U.S. patent application number 15/782250 was filed with the patent office on 2018-11-08 for diaphragm pump.
The applicant listed for this patent is XIAMEN KOGE MICRO TECH CO., LTD.. Invention is credited to Chih Chang.
Application Number | 20180320681 15/782250 |
Document ID | / |
Family ID | 64014575 |
Filed Date | 2018-11-08 |
United States Patent
Application |
20180320681 |
Kind Code |
A1 |
Chang; Chih |
November 8, 2018 |
DIAPHRAGM PUMP
Abstract
A diaphragm pump including: a pump body including an upper
cover, a valve seat and a cylinder body connected in sequence. The
valve seat has a water inlet hole and a water outlet hole. The
upper cover and the valve seat define a water inlet cavity and a
water outlet cavity independent from each other. The water inlet
hole communicates with the water inlet cavity while the water
outlet hole communicates with the water outlet cavity. A mounting
base is provided to a bottom of the water outlet cavity, and a
plurality of spaced first position-limiting members are formed at a
top of the water outlet cavity and extend downwards. A water inlet
valve block is provided to a bottom surface of the valve seat to
open or close the water inlet hole. A diaphragm assembly controls
opening or closure of the water outlet hole.
Inventors: |
Chang; Chih; (Fujian,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
XIAMEN KOGE MICRO TECH CO., LTD. |
Fujian |
|
CN |
|
|
Family ID: |
64014575 |
Appl. No.: |
15/782250 |
Filed: |
October 12, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04B 43/026 20130101;
F04B 53/16 20130101; F04B 43/04 20130101; F04B 9/045 20130101; F04B
49/065 20130101; F04B 43/0054 20130101; F04B 43/043 20130101; F04B
2203/0209 20130101 |
International
Class: |
F04B 43/04 20060101
F04B043/04; F04B 43/00 20060101 F04B043/00; F04B 53/16 20060101
F04B053/16 |
Foreign Application Data
Date |
Code |
Application Number |
May 5, 2017 |
CN |
201720497206.9 |
Aug 30, 2017 |
CN |
201721097409.5 |
Aug 30, 2017 |
CN |
201721097501.1 |
Aug 30, 2017 |
CN |
201721098388.9 |
Aug 30, 2017 |
CN |
201721098389.3 |
Aug 30, 2017 |
CN |
201721098390.6 |
Claims
1. A diaphragm pump, comprising: a pump body comprising an upper
cover, a valve seat and a cylinder body connected in sequence, the
valve seat having a water inlet hole and a water outlet hole, the
upper cover and the valve seat defining a water inlet cavity and a
water outlet cavity independent from each other, the water inlet
hole being in communication with the water inlet cavity while the
water outlet hole being in communication with the water outlet
cavity, a mounting base being provided to a bottom of the water
outlet cavity, and a plurality of spaced first position-limiting
members being formed at a top of the water outlet cavity and
extending downwards; a water inlet valve block provided to a bottom
surface of the valve seat to open or close the water inlet hole; a
diaphragm assembly mounted to the mounting base to control opening
or closure of the water outlet hole, and comprising a plurality of
water outlet valve blocks arranged opposite to the plurality of
first position-limiting members; a piston assembly connected to a
bottom of the valve seat, and comprising a capsule body having a
capsule cavity, the capsule cavity being communicated with the
water inlet cavity and the water outlet cavity through the water
inlet hole and the water outlet hole respectively; a connecting rod
assembly driving the capsule body to swing up and down between an
upper movement dead point and a lower movement dead point to
squeeze or stretch the capsule cavity so as to realize a function
of pumping fluid, the connecting rod assembly comprising: a
connecting rod connected with the capsule body, a steel shaft
having an upper end connected with a connecting hole, and an
eccentric wheel connected with a lower end of the steel shaft; a
driving assembly comprising: a base seat connected to the pump body
to define a chamber and an electric motor having an electric motor
shaft connected with the eccentric wheel.
2. The diaphragm pump according to claim 1, wherein the diaphragm
assembly comprises a positioning plate having an upper surface and
a lower surface both configured as flat surfaces, and the
positioning plate comprises: a central positioning plate; and
positioning strips connected to a circumferential edge of the
central positioning plate and extends along a radial direction of
the central positioning plate, wherein the water outlet valve block
is connected to the circumferential edge of the central positioning
plate and extends along the radial direction of the central
positioning plate, and a distance between an upper surface of the
water outlet valve block and the upper surface of the positioning
plate is identical to a distance between a lower surface of the
water outlet valve block and the lower surface of the positioning
plate, the water outlet valve block being located between two
positioning strips.
3. The diaphragm pump according to claim 2, wherein the mounting
base has a mounting groove matching the positioning plate in shape,
and the mounting groove comprises: a central groove in which the
central positioning plate is snapped; branch grooves distributed in
a circumferential direction of the central groove and communicated
with the central groove, the positioning strip being snapped in the
branch groove, a second position-limiting member being provided to
the top of the water outlet cavity, and a lower end of the second
position-limiting member being in contact with an upper surface of
the positioning strip.
4. The diaphragm pump according to claim 3, wherein a distance
between an upper surface of the branch groove and the lower end of
the second position-limiting member is smaller than a thickness of
the positioning strip.
5. The diaphragm pump according to claim 3, wherein the central
groove is provided with a first positioning column, and the central
positioning plate is provided with a first positioning hole fitted
with the first positioning column.
6. The diaphragm pump according to claim 3, wherein a rib is
provided along a peripheral edge of the mounting groove.
7. The diaphragm pump according to claim 6, wherein an end of the
branch groove away from the central groove is provided with a
baffle, and an upper surface of the baffle is higher than an upper
surface of the rib.
8. The diaphragm pump according to claim 6, wherein the bottom of
the water outlet cavity is provided with a support stand having a
through hole in communication with the water outlet hole, and the
support stand is connected to the rib at a circumferential edge of
the central groove.
9. The diaphragm pump according to claim 8, wherein a diaphragm
part is provided between the water outlet valve block and the
central positioning plate, and an arc groove is formed at a
position where a peripheral edge of the diaphragm part is connected
with the positioning strip.
10. The diaphragm pump according to claim 9, wherein a connecting
bridge is provided between the support stand and the rib, and the
connecting bridge is disposed opposite to the diaphragm part.
11. The diaphragm pump according to claim 2, wherein the
positioning strips are equally spaced and distributed along the
circumferential edge of the central groove, and the water outlet
valve block and two adjacent positioning strips are spaced from
each other.
12. The diaphragm pump according to claim 1, wherein the upper
cover constructs a downwardly open cavity structure, and an upper
annular partition plate is provided to a bottom surface of the
upper cover; the valve seat constructs an upwardly open cavity
structure, and a lower annular partition plate corresponding to the
upper annular partition plate is provided to a top surface of the
valve seat.
13. The diaphragm pump according to claim 1, wherein a bottom
surface of the cylinder body extends downwards to form a stopping
member, and a lower end face of the stopping member is opposite to
and spaced at a predetermined distance from a central position in a
top surface of the connecting rod.
14. The diaphragm pump according to claim 1, wherein the capsule
body comprises: a plurality of capsule cavities open upwards; a
panel located between the valve seat and the cylinder body and
connected to respective upper outer circumferential edges of the
plurality of capsule cavities, so as to connect the plurality of
capsule cavities into a whole; a mounting column connected to a
bottom of the capsule cavity, the connecting rod being provided
with a second mounting hole fitted with the mounting column.
15. The diaphragm pump according to claim 14, wherein the capsule
cavity comprises: a thin-walled part having a bottom surface
connected with an upper end of the mounting column; and a
thick-walled part having a lower end whose circumferential edge is
connected with a circumferential edge of an upper end of the
thin-walled part, and an upper end whose circumferential edge is
connected with a bottom surface of the panel.
16. The diaphragm pump according to claim 15, wherein a wall
thickness of the thick-walled part is larger than that of the
thin-walled part.
17. The diaphragm pump according to claim 14, wherein a second
positioning column is provided to a top surface of the cylinder
body and extends upwards, and the panel is provided with a second
positioning hole fitted with the second positioning column.
18. The diaphragm pump according to claim 17, wherein the second
positioning column is in interference fit with the second
positioning hole.
19. The diaphragm pump according to claim 1, wherein the cylinder
body is provided with a first mounting hole, and the capsule body
is snapped into the first mounting hole and immobilized relative to
the first mounting hole.
20. The diaphragm pump according to claim 1, wherein a columnar
boss is provided to the bottom surface of the valve seat and
extends downwards, the columnar boss has the water inlet hole
penetrating through the bottom and top surfaces of the valve seat,
and a circumferential wall of the columnar boss extends obliquely
from up to down to form a first inclined surface.
21. The diaphragm pump according to claim 20, wherein an upper
inner circumferential edge of the capsule cavity extends obliquely
from up to down to form a second inclined surface, the first
inclined surface being closely fitted with the second inclined
surface.
22. The diaphragm pump according to claim 20, wherein the columnar
boss has a third positioning hole configured to immobilize the
water inlet valve block, and a plurality of water inlet holes are
defined in a circumferential direction of the third positioning
hole.
23. The diaphragm pump according to claim 22, wherein the water
inlet valve block comprises: a valve membrane covering the water
inlet hole; and a third positioning column having a first end
connected to the valve membrane and a second end upwardly extending
through the third positioning hole.
24. The diaphragm pump according to claim 23, wherein the first end
of the third positioning column forms an anti-rotation flange, and
the third positioning hole has a position-limiting groove fitted
with the anti-rotation flange.
25. The diaphragm pump according to claim 23, wherein the second
end of the third positioning column has a position-limiting
protrusion, and the position-limiting protrusion abuts against the
top surface of the valve seat.
26. The diaphragm pump according to claim 20, wherein the columnar
boss has an avoidance notch, and an inlet end of the water outlet
hole is arranged opposite to the avoidance notch.
27. The diaphragm pump according to claim 20, wherein three
columnar bosses are provided to the bottom surface of the valve
seat, and the three columnar bosses constitute an equilateral
triangle.
28. The diaphragm pump according to claim 1, wherein the connecting
rod comprises: a rod body having a first end of the rod body
provided with the connecting hole extending along an axial
direction of the rod body, a circumferential face of the connecting
hole being provided with a plurality of heat radiating grooves, and
the plurality of heat radiating grooves extending along an axial
direction of the connecting hole; and a mounting plate connected to
a second end of the rod body, a plurality of connecting arms being
spaced along a circumferential direction of the mounting plate, the
mounting plate having a plurality of material-reducing holes formed
by recessing a top surface of the mounting plate downwardly, the
plurality of connecting arms obliquely extending downwards and
outwards from a central position in the mounting plate, a free end
of each connecting arm being provided with a mounting protrusion,
and a lower end face of the mounting protrusion being lower than a
lower end face of the connecting arm.
29. The diaphragm pump according to claim 28, wherein a reinforcing
rib is provided between an outer circumferential surface of the
mounting protrusion and an outer circumferential surface of the rod
body, and the reinforcing rib extends upwards to be connected to a
bottom surface of the mounting plate.
30. The diaphragm pump according to claim 1, further comprising: a
photoelectric shielding sheet integrally formed with the eccentric
wheel and rotating synchronously with the eccentric wheel and the
electric motor shaft; and a photoelectric sensor provided to the
base seat and cooperating with the photoelectric shielding sheet so
as to detect a rotational speed of the electric motor shaft and
send a detection signal to an electric motor controller, the
electric motor controller being configured to adjust the rotational
speed of the electric motor shaft of the electric motor according
to the detection signal.
31. The diaphragm pump according to claim 30, wherein the
photoelectric shielding sheet extends outwards along a radial
direction of the eccentric wheel.
32. The diaphragm pump according to claim 30, wherein the
photoelectric shielding sheet comprises: a positioning portion
provided to an upper surface of the eccentric wheel; and a
shielding portion connected to the positioning portion and
extending radially outwards.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to and benefits of Chinese
Patent Application Serial No. 201720497206.9, filed with the State
Intellectual Property Office of P. R. China on May 5, 2017, Chinese
Patent Application Serial No. 201721098389.3, filed with the State
Intellectual Property Office of P. R. China on Aug. 30, 2017,
Chinese Patent Application Serial No. 201721098388.9, filed with
the State Intellectual Property Office of P. R. China on Aug. 30,
2017, Chinese Patent Application Serial No. 201721098390.6, filed
with the State Intellectual Property Office of P. R. China on Aug.
30, 2017, Chinese Patent Application Serial No. 201721097501.1,
filed with the State Intellectual Property Office of P. R. China on
Aug. 30, 2017, and Chinese Patent Application Serial No.
201721097409.5, filed with the State Intellectual Property Office
of P. R. China on Aug. 30, 2017, the entire content of which are
incorporated herein by reference.
FIELD
[0002] The present disclosure relates to a technical field of
pumps, and more particularly to a diaphragm pump.
BACKGROUND
[0003] A micro water pump in the related art has unstable water
flow and low efficiency.
SUMMARY
[0004] Embodiments of the present disclosure seek to solve at least
one of the problems existing in the related art to at least some
extent.
[0005] Accordingly, the present disclosure provides a diaphragm
pump that has stable flow.
[0006] The diaphragm pump according to embodiments of the present
disclosure includes: a pump body including an upper cover, a valve
seat and a cylinder body connected in sequence, the valve seat
having a water inlet hole and a water outlet hole, the upper cover
and the valve seat defining a water inlet cavity and a water outlet
cavity independent from each other, the water inlet hole being in
communication with the water inlet cavity while the water outlet
hole being in communication with the water outlet cavity, a
mounting base being provided to a bottom of the water outlet
cavity, and a plurality of spaced first position-limiting members
being formed at a top of the water outlet cavity and extending
downwards; a water inlet valve block provided to a bottom surface
of the valve seat to open or close the water inlet hole; a
diaphragm assembly mounted to the mounting base to control opening
or closure of the water outlet hole, and including a plurality of
water outlet valve blocks arranged opposite to the plurality of
first position-limiting members; a piston assembly connected to a
bottom of the valve seat, and including a capsule body having a
capsule cavity, the capsule cavity being communicated with the
water inlet cavity and the water outlet cavity through the water
inlet hole and the water outlet hole respectively; a connecting rod
assembly driving the capsule body to swing up and down between an
upper movement dead point and a lower movement dead point to
squeeze or stretch the capsule cavity so as to realize a function
of pumping fluid, the connecting rod assembly including: a
connecting rod connected with the capsule body, a steel shaft
having an upper end connected with a connecting hole, and an
eccentric wheel connected with a lower end of the steel shaft; a
driving assembly including: a base seat connected to the pump body
to define a chamber and an electric motor having an electric motor
shaft connected with the eccentric wheel.
[0007] In the diaphragm pump according to embodiments of the
present disclosure, since the plurality of spaced first
position-limiting members are formed at the top of the water outlet
cavity and extend downwards, a degree of openness of the water
outlet valve block can be limited by the first position-limiting
members, and an output flow of the diaphragm pump keeps stable.
[0008] In addition, the diaphragm pump according to embodiments of
the present disclosure can further include the following additional
technical features.
[0009] According to some embodiments of the present disclosure, the
diaphragm assembly includes a positioning plate having an upper
surface and a lower surface both configured as flat surfaces. The
positioning plate includes: a central positioning plate; and
positioning strips connected to a circumferential edge of the
central positioning plate and extends along a radial direction of
the central positioning plate. The water outlet valve block is
connected to the circumferential edge of the central positioning
plate and extends along the radial direction of the central
positioning plate, and a distance between an upper surface of the
water outlet valve block and the upper surface of the positioning
plate is identical to a distance between a lower surface of the
water outlet valve block and the lower surface of the positioning
plate, the water outlet valve block being located between two
positioning strips.
[0010] According to some embodiments of the present disclosure, the
mounting base has a mounting groove matching the positioning plate
in shape. Moreover, the mounting groove includes: a central groove
in which the central positioning plate is snapped; branch grooves
distributed in a circumferential direction of the central groove
and communicated with the central groove, the positioning strip
being snapped in the branch groove, a second position-limiting
member being provided to the top of the water outlet cavity, and a
lower end of the second position-limiting member being in contact
with an upper surface of the positioning strip.
[0011] According to some embodiments of the present disclosure, a
distance between an upper surface of the branch groove and the
lower end of the second position-limiting member is smaller than a
thickness of the positioning strip.
[0012] According to some embodiments of the present disclosure, the
central groove is provided with a first positioning column, and the
central positioning plate is provided with a first positioning hole
fitted with the first positioning column.
[0013] According to some embodiments of the present disclosure, a
rib is provided along a peripheral edge of the mounting groove.
[0014] According to some embodiments of the present disclosure, an
end of the branch groove away from the central groove is provided
with a baffle, and an upper surface of the baffle is higher than an
upper surface of the rib.
[0015] According to some embodiments of the present disclosure, the
bottom of the water outlet cavity is provided with a support stand
having a through hole in communication with the water outlet hole,
and the support stand is connected to the rib at a circumferential
edge of the central groove.
[0016] According to some embodiments of the present disclosure, a
diaphragm part is provided between the water outlet valve block and
the central positioning plate, and an arc groove is formed at a
position where a peripheral edge of the diaphragm part is connected
with the positioning strip.
[0017] According to some embodiments of the present disclosure, a
connecting bridge is provided between the support stand and the
rib, and the connecting bridge is disposed opposite to the
diaphragm part.
[0018] According to some embodiments of the present disclosure, the
positioning strips are equally spaced and distributed along the
circumferential edge of the central groove, and the water outlet
valve block and two adjacent positioning strips are spaced from
each other.
[0019] According to some embodiments of the present disclosure, the
upper cover constructs a downwardly open cavity structure, and an
upper annular partition plate is provided to a bottom surface of
the upper cover; the valve seat constructs an upwardly open cavity
structure, and a lower annular partition plate corresponding to the
upper annular partition plate is provided to a top surface of the
valve seat.
[0020] According to some embodiments of the present disclosure, a
bottom surface of the cylinder body extends downwards to form a
stopping member, and a lower end face of the stopping member is
opposite to and spaced at a predetermined distance from a central
position in a top surface of the connecting rod.
[0021] According to some embodiments of the present disclosure, the
capsule body includes: a plurality of capsule cavities opened
upwards; a panel located between the valve seat and the cylinder
body and connected to respective upper outer circumferential edges
of the plurality of capsule cavities, so as to connect the
plurality of capsule cavities into a whole; a mounting column
connected to a bottom of the capsule cavity, the connecting rod
being provided with a second mounting hole fitted with the mounting
column.
[0022] According to some embodiments of the present disclosure, the
capsule cavity includes: a thin-walled part having a bottom surface
connected with an upper end of the mounting column; and a
thick-walled part having a lower end whose circumferential edge is
connected with a circumferential edge of an upper end of the
thin-walled part, and an upper end whose circumferential edge is
connected with a bottom surface of the panel.
[0023] According to some embodiments of the present disclosure, a
wall thickness of the thick-walled part is larger than that of the
thin-walled part.
[0024] According to some embodiments of the present disclosure, a
second positioning column is provided to a top surface of the
cylinder body and extends upwards, and the panel is provided with a
second positioning hole fitted with the second positioning
column.
[0025] According to some embodiments of the present disclosure, the
second positioning column is in interference fit with the second
positioning hole.
[0026] According to some embodiments of the present disclosure, the
cylinder body is provided with a first mounting hole, and the
capsule body is snapped into the first mounting hole and
immobilized relative to the first mounting hole.
[0027] According to some embodiments of the present disclosure, a
columnar boss is provided to the bottom surface of the valve seat
and extends downwards, the columnar boss has the water inlet hole
penetrating through the bottom and top surfaces of the valve seat,
and a circumferential wall of the columnar boss extends obliquely
from up to down to form a first inclined surface.
[0028] According to some embodiments of the present disclosure, an
upper inner circumferential edge of the capsule cavity extends
obliquely from up to down to form a second inclined surface, the
first inclined surface being closely fitted with the second
inclined surface.
[0029] According to some embodiments of the present disclosure, the
columnar boss has a third positioning hole configured to immobilize
the water inlet valve block, and a plurality of water inlet holes
are defined in a circumferential direction of the third positioning
hole.
[0030] According to some embodiments of the present disclosure, the
water inlet valve block includes: a valve membrane covering the
water inlet hole; and a third positioning column having a first end
connected to the valve membrane and a second end upwardly extending
through the third positioning hole.
[0031] According to some embodiments of the present disclosure, the
first end of the third positioning column forms an anti-rotation
flange, and the third positioning hole has a position-limiting
groove fitted with the anti-rotation flange.
[0032] According to some embodiments of the present disclosure, the
second end of the third positioning column has a position-limiting
protrusion, and the position-limiting protrusion abuts against the
top surface of the valve seat.
[0033] According to some embodiments of the present disclosure, the
columnar boss has an avoidance notch, and an inlet end of the water
outlet hole is arranged opposite to the avoidance notch.
[0034] According to some embodiments of the present disclosure,
three columnar bosses are provided to the bottom surface of the
valve seat, and the three columnar bosses constitute an equilateral
triangle.
[0035] According to some embodiments of the present disclosure, the
connecting rod includes: a rod body having a first end of the rod
body provided with the connecting hole extending along an axial
direction of the rod body, a circumferential face of the connecting
hole being provided with a plurality of heat radiating grooves, and
the plurality of heat radiating grooves extending along an axial
direction of the connecting hole; and a mounting plate connected to
a second end of the rod body, a plurality of connecting arms being
spaced along a circumferential direction of the mounting plate, the
mounting plate having a plurality of material-reducing holes formed
by recessing a top surface of the mounting plate downwardly, the
plurality of connecting arms obliquely extending downwards and
outwards from a central position in the mounting plate, a free end
of each connecting arm being provided with a mounting protrusion,
and a lower end face of the mounting protrusion being lower than a
lower end face of the connecting arm.
[0036] According to some embodiments of the present disclosure, a
reinforcing rib is provided between an outer circumferential
surface of the mounting protrusion and an outer circumferential
surface of the rod body, and the reinforcing rib extends upwards to
be connected to a bottom surface of the mounting plate.
[0037] According to some embodiments of the present disclosure, the
diaphragm pump further includes: a photoelectric shielding sheet
integrally formed with the eccentric wheel and rotating
synchronously with the eccentric wheel and the electric motor
shaft; and a photoelectric sensor provided to the base seat and
cooperating with the photoelectric shielding sheet so as to detect
a rotational speed of the electric motor shaft and send a detection
signal to an electric motor controller, the electric motor
controller being configured to adjust the rotational speed of the
electric motor shaft of the electric motor according to the
detection signal.
[0038] According to some embodiments of the present disclosure, the
photoelectric shielding sheet extends outwards along a radial
direction of the eccentric wheel.
[0039] According to some embodiments of the present disclosure, the
photoelectric shielding sheet includes: a positioning portion
provided to an upper surface of the eccentric wheel; and a
shielding portion connected to the positioning portion and
extending radially outwards.
BRIEF DESCRIPTION OF THE DRAWINGS
[0040] These and other aspects and advantages of embodiments of the
present disclosure will become apparent and more readily
appreciated from the following descriptions made with reference to
the drawings, in which:
[0041] FIG. 1 is a partially sectional view of a diaphragm pump
according to an embodiment of the present disclosure;
[0042] FIG. 2 is an exploded view of a diaphragm pump according to
an embodiment of the present disclosure;
[0043] FIG. 3 is a partially sectional view of a diaphragm pump
according to an embodiment of the present disclosure;
[0044] FIG. 4 is a perspective view of an upper cover according to
an embodiment of the present disclosure;
[0045] FIG. 5 is a bottom view of an upper cover according to an
embodiment of the present disclosure;
[0046] FIG. 6 is a perspective view of a valve seat according to an
embodiment of the present disclosure;
[0047] FIG. 7 is a perspective view of a diaphragm assembly
according to an embodiment of the present disclosure;
[0048] FIG. 8 is a perspective view of a diaphragm assembly mounted
to a valve seat according to an embodiment of the present
disclosure;
[0049] FIG. 9 is a top view of a diaphragm assembly mounted to a
valve seat according to an embodiment of the present
disclosure;
[0050] FIG. 10 is a perspective view of a cylinder body according
to an embodiment of the present disclosure;
[0051] FIG. 11 is a perspective view of a cylinder body according
to an embodiment of the present disclosure;
[0052] FIG. 12 is a perspective view of a capsule body according to
an embodiment of the present disclosure;
[0053] FIG. 13 is a perspective view of a capsule body according to
an embodiment of the present disclosure;
[0054] FIG. 14 is a perspective view of a valve seat according to
an embodiment of the present disclosure;
[0055] FIG. 15 is a sectional view taken along line A-A of FIG. 14
according to an embodiment of the present disclosure;
[0056] FIG. 16 is a perspective view of a valve seat according to
an embodiment of the present disclosure;
[0057] FIG. 17 is a perspective view of a water inlet valve block
according to an embodiment of the present disclosure;
[0058] FIG. 18 is a perspective view of a connecting rod according
to an embodiment of the present disclosure;
[0059] FIG. 19 is a bottom view of a connecting rod according to an
embodiment of the present disclosure;
[0060] FIG. 20 is a sectional view taken along line B-B of FIG. 19
according to an embodiment of the present disclosure;
[0061] FIG. 21 is a perspective view of a connecting rod assembly
according to an embodiment of the present disclosure;
[0062] FIG. 22 is a bottom view of a connecting rod assembly
according to an embodiment of the present disclosure;
[0063] FIG. 23 is a sectional view taken along line C-C of FIG. 22
according to an embodiment of the present disclosure;
[0064] FIG. 24 is an assembly view of a photoelectric sensor, a
printed circuit board and a lead wire connector according to an
embodiment of the present disclosure;
[0065] FIG. 25 is a perspective view of a lead wire according to an
embodiment of the present disclosure.
REFERENCE NUMERALS
[0066] diaphragm pump 100,
[0067] driving assembly 10, base seat 11, electric motor 12,
electric motor shaft 121,
[0068] pump body 20, [0069] cavity 21, water outlet cavity 211,
water inlet cavity 212, [0070] upper cover 22, first
position-limiting member 221, second position-limiting member 222,
upper annular partition plate 223, water inlet pipe 224, water
outlet pipe 225, [0071] valve seat 23, mounting base 230, first
positioning column 2303, rib 2304, support stand 231, lower annular
partition plate 232, mounting groove 233, central groove 2331,
branch groove 2332, baffle 2333, connecting bridge 234, water
outlet hole 235, water inlet hole 236, columnar boss 237, first
inclined surface 2370, third positioning hole 2371,
position-limiting groove 2372, avoidance notch 2373, [0072]
cylinder body 24, stopping member 241, second positioning column
242, first mounting hole 243, [0073] diaphragm assembly 25, water
outlet valve block 251, positioning plate 252, central positioning
plate 2521, positioning strip 2522, first positioning hole 253,
diaphragm part 254, [0074] water inlet valve block 26, valve
membrane 261, third positioning column 262, anti-rotation flange
263, position-limiting protrusion 264, [0075] chamber 27, [0076]
connecting rod assembly 30; connecting rod 31, second mounting hole
311, rod body 312, connecting hole 3121, heat radiating groove
3122, mounting plate 313, material-reducing hole 3131, connecting
arm 314, mounting protrusion 3141, reinforcing rib 315, [0077]
steel shaft 32, [0078] eccentric wheel 33, eccentric hole 331,
[0079] photoelectric shielding sheet 40, inclined hole 41,
[0080] photoelectric sensor 50,
[0081] printed circuit board 70, lead wire connector 71, lead wire
jack 711,
[0082] lead wire 80, lead wire plug 81,
[0083] piston assembly 90, capsule body 91, panel 911, second
positioning hole 9110, capsule cavity 912, second inclined surface
9120, thick-walled part 913, thin-walled part 914, mounting column
915.
DETAILED DESCRIPTION
[0084] Reference will be made in detail to embodiments of the
present disclosure. The same or similar elements and the elements
having same or similar functions are denoted by like reference
numerals throughout the descriptions. The embodiments described
herein with reference to drawings are explanatory, illustrative,
and used to generally understand the present disclosure rather than
construed to limit the present disclosure.
[0085] A diaphragm pump 100 according to embodiments of the present
disclosure will be described in below with reference to FIGS. 1-25.
The diaphragm pump 100 can be widely used in technical fields of
medical equipment and home appliances. For example, the diaphragm
pump 100 may be applied in a coffee machine or a juicer, and water
is pumped to the coffee machine or the juicer through the diaphragm
pump 100. For another example, the diaphragm pump 100 may also be
applied in a sphygmomanometer, a car seat or a massage chair, and
the sphygmomanometer, the car seat or the massage chair may be
inflated or deflated through the diaphragm pump 100. It could be
understood that, the above description is just illustrative, and is
not a limit to the protection scope of the present disclosure.
[0086] The diaphragm pump 100 according to embodiments of the
present disclosure, as shown in FIGS. 1, 2 and 3, can generally
include a pump body 20, a water inlet valve block 26, a diaphragm
assembly 25, a piston assembly 90, a connecting rod assembly 30 and
a driving assembly 10. The driving assembly 10 can include a base
seat 11 and an electric motor 12 provided to the base seat 11.
[0087] The pump body 20 includes an upper cover 22, a valve seat 23
and a cylinder body 24 which are connected in sequence. The valve
seat 23 is provided with a water inlet hole 236 and a water outlet
hole 235. The upper cover 22 and the valve seat 23 define a water
inlet cavity 212 and a water outlet cavity 211 independent from
each other, the water inlet hole 236 is in communication with the
water inlet cavity 212, and the water outlet hole 235 is in
communication with the water outlet cavity 211. A bottom of the
water outlet cavity 211 is provided with a mounting base 230. As
shown in FIG. 4, a plurality of first position-limiting members 221
spaced from each other are formed at a top of the water outlet
cavity 211 and extend downwards.
[0088] The water inlet valve block 26 is provided to a bottom
surface of the valve seat 23 to open or close the water inlet hole
236. The diaphragm assembly 25 is mounted to the mounting base 230
to control opening or closure of the water outlet hole 235. The
diaphragm assembly 25 includes a plurality of water outlet valve
blocks 251 arranged opposite to the plurality of first
position-limiting members 221.
[0089] The piston assembly 90 is connected to a bottom of the valve
seat 23, and includes a capsule body 91 having a capsule cavity
912. The capsule cavity 912 is communicated with the water inlet
cavity 212 and the water outlet cavity 211 through the water inlet
hole 236 and the water outlet hole 235 respectively.
[0090] The connecting rod assembly 30 drives the capsule body 91 to
swing up and down between an upper movement dead point and a lower
movement dead point to squeeze or stretch the capsule cavity 912 to
realize a function of pumping fluid. The connecting rod assembly 30
includes a connecting rod 31, a steel shaft 32 and an eccentric
wheel 33. The connecting rod 31 is connected with the capsule body
91, and the steel shaft 32 has an upper end connected with a
connecting hole 3121 and a lower end connected with the eccentric
wheel 33. The driving assembly 10 includes the base seat 11 and the
electric motor 12, the pump body 20 is connected to the base seat
11 to define a chamber 27, and the electric motor 12 has an
electric motor shaft 121 that is connected with the eccentric wheel
33.
[0091] Specifically, as shown in FIGS. 1, 2 and 3, the pump body 20
can include the upper cover 22, the valve seat 23 and the cylinder
body 24 which are connected in sequence. The upper cover 22
includes a water inlet pipe 224 having a water inlet and a water
outlet pipe 225 having a water outlet. The valve seat 23 is
provided with a plurality of groups of water outlet holes 235 and a
plurality of groups of water inlet holes 236. The water inlet valve
block 26 for opening or closing the water inlet hole 236 is
provided at a position on a lower surface of the valve seat 23
corresponding to each group of water inlet holes 236, and for
example is an umbrella-shaped valve. The diaphragm assembly 25 for
opening or closing the water outlet hole 235 is provided at a
position on an upper surface of the valve seat 23 corresponding to
the water outlet hole 235.
[0092] As shown in FIGS. 10, 11, 12 and 13, the cylinder body 24 is
connected between the valve seat 23 and the base seat 11, and the
cylinder body 24 is provided with a plurality of first mounting
holes 243. The piston assembly 90 for pumping the fluid is mounted
to the cylinder body 24. The piston assembly 90 has a plurality of
capsule bodies 91 and a panel 911 for connecting the plurality of
capsule bodies 91. Each capsule body 91 falls into the first
mounting hole 243. Each capsule body 91 includes the capsule cavity
912 and a mounting column 915. An upper end of the capsule cavity
912 is open, and the panel 911 and a circumferential edge of the
upper end of each capsule cavity 912 are connected and formed
integrally. A lower end of the capsule cavity 912 is connected with
an upper end of the mounting column 915. Each capsule cavity 912
runs through the first mounting hole 243 and is closely provided to
an upper surface of the cylinder body 24 by the panel 911. The
valve seat 23 is pressed on the panel 911 so that the piston
assembly 90 is clamped between the valve seat 23 and the base seat
11.
[0093] The upper cover 22 and the valve seat 23 may be snap-fitted
together, the valve seat 23 and the cylinder body 24 being
snap-fitted together as well as the cylinder body 24 and the base
seat 11 being snap-fitted together, and then all of them may be
connected into a whole by a plurality of clamps. The pump body 20
may be configured as a square frame or a cylindrical frame.
[0094] As shown in FIGS. 1, 3 and 13, the connecting rod assembly
30 is connected with the electric motor shaft 121 of the electric
motor 12 and the mounting column 915 separately, such that during
rotation of the electric motor 12, the connecting rod assembly 30
drives the capsule body 91 to swing up and down, thereby
compressing and expanding the capsule cavity 912 to perform a
process of pumping the fluid. In the diaphragm pump 100, during the
opening or closure of the water outlet valve block 251, the first
position-limiting member 221 limits a degree of openness of the
water outlet valve block 251, that is, upon an upper surface of the
water outlet valve block 251 touches a lower end face of the first
position-limiting member 221, the first position-limiting member
221 will prevent the water outlet valve block 251 from continuing
moving upwards, such that the degree of openness of the water
outlet valve block 251 remains constant, and hence an output flow
of the diaphragm pump 100 remains constant. Furthermore, the first
position-limiting member 221 solves a problem that the water outlet
valve block 251 opens upwards excessively and cannot be
restored.
[0095] Therefore, in the diaphragm pump 100 according to
embodiments of the present disclosure, since the plurality of
spaced first position-limiting members 221 are formed at the top of
the water outlet cavity 211 and extend downwards, the degree of
openness of the water outlet valve block 251 can be limited by the
first position-limiting members 221, and the output flow of the
diaphragm pump 100 keeps stable.
[0096] In some embodiments of the present disclosure, referring to
FIGS. 6 and 7, the diaphragm assembly 25 includes a positioning
plate 252. The positioning plate 252 includes a central positioning
plate 2521 and a positioning strip 2522, and the positioning strip
2522 is connected to a circumferential edge of the central
positioning plate 2521 and extends along a radial direction of the
central positioning plate 2521. The water outlet valve block 251 is
connected to the circumferential edge of the central positioning
plate 2521 and extends along the radial direction of the central
positioning plate 2521, and the water outlet valve block 251 is
located between two positioning strips 2522. The plurality of water
outlet valve blocks 251 are integrated and provided to the
positioning plate 252, so as to facilitate processing and molding
of the diaphragm assembly 25 and reduce production costs.
[0097] In an optional embodiment, upper and lower surfaces of the
diaphragm assembly 25 can be configured as flat surfaces, such that
it is unnecessary to distinguish which direction the diaphragm
assembly 25 is mounted to the mounting base 230, thereby improving
mounting efficiency.
[0098] In some embodiments of the present disclosure, as shown in
FIG. 6, the mounting base 230 has a mounting groove 233, and the
mounting groove 233 includes a central groove 2331 and branch
grooves 2332. The central positioning plate 2521 is snapped in the
central groove 2331, the branch grooves 2332 are distributed in a
circumferential direction of the central groove 2331 and
communicated with the central groove 2331, and the positioning
strip 2522 is snapped in the branch groove 2332. The top of the
water outlet cavity 211 is provided with a second position-limiting
member 222, and a lower end of the second position-limiting member
222 is in contact with an upper surface of the positioning strip
2522.
[0099] As shown in FIG. 4, the second position-limiting member 222
is provided at the top of the water outlet cavity 211, and the
lower end of the second position-limiting member 222 is in contact
with the upper surface of the positioning strip 2522. That is, the
positioning strip 2522 of the diaphragm assembly 25 is defined in
the branch groove 2332, displacement of the positioning strip 2522
in the circumferential direction is restricted by the branch groove
2332, and displacement of the positioning strip 2522 in an
up-and-down direction is restricted by the second position-limiting
member 222. Thus, the diaphragm assembly 25 can be mounted and
positioned on the mounting base 230 effectively, and displacement
of the diaphragm assembly 25 can be avoided to enable the diaphragm
pump 100 to pump the fluid normally.
[0100] In some optional embodiments, a distance between an upper
surface of the branch groove 2332 and the lower end of the second
position-limiting member 222 is smaller than a thickness of the
positioning strip 2522. That is, when the diaphragm assembly 25 is
assembled to the mounting base 230, the second position-limiting
member 222 can be pressed against and limit the upper surface of
the positioning strip 2522, i.e. when the second position-limiting
member 222 acts on the upper surface of the positioning strip 2522,
the positioning strip 2522 is compressed slightly, and hence the
displacement of the positioning strip 2522 in the up-and-down
direction is defined effectively.
[0101] Certainly, it could be understood that the lower end of the
second position-limiting member 222 may not apply a pre-pressure to
the upper surface of the positioning strip 2522, i.e. the lower end
of the second position-limiting member 222 is fitted with the upper
surface of the positioning strip 2522 with zero compression.
[0102] In some embodiments, as shown in FIG. 6, the central groove
2331 is provided with a first positioning column 2303, and the
central positioning plate 2521 is provided with a first positioning
hole 253 fitted with the first positioning column 2303. The fitting
between the first positioning column 2303 and the first positioning
hole 253 serves as an initial positioning and provides a basis for
the subsequent installation of the diaphragm assembly 25.
[0103] In some specific embodiments, as shown in FIGS. 6 and 8, a
rib 2304 is provided along a peripheral edge of the mounting groove
233. The rib 2304 extends upwards to define an accommodating space
for the diaphragm assembly 25, thereby effectively limiting a
degree of freedom of the diaphragm assembly 25 in the
circumferential direction.
[0104] In a specific embodiment, as shown in FIGS. 6 and 8, an end
of the branch groove 2332 away from the central groove 2331 is
provided with a baffle 2333, and an upper surface of the baffle
2333 is higher than an upper surface of the rib 2304. The central
positioning plate 2521 is snapped in the central groove 2331, and
the positioning strip 2522 is snapped in the branch groove
2332.
[0105] During the installation of the diaphragm assembly 25, the
central positioning plate 2521 can be first pressed in the central
groove 2331, and then the positioning strip 2522 is pressed into
the branch groove 2332. Since the end of the branch groove 2332 is
provided with the baffle 2333 higher than the rib 2304, it is
possible to prevent the positioning strip 2522 from moving along a
circumferential direction of the central positioning plate 2521 and
enhance stability of the installation of the diaphragm assembly 25,
such that the water outlet valve block 251 and the water outlet
hole 235 are accurately fitted to effectively control the opening
and closure of the water outlet hole 235.
[0106] In some other optional embodiments, as shown in FIG. 6, the
bottom of the water outlet cavity 211 is provided with a support
stand 231 having a through hole in communication with the water
outlet hole 235, and the support stand 231 is connected to the rib
2304 at a circumferential edge of the central groove 2331. Thus,
after the diaphragm assembly 25 is assembled to the mounting base
230, the water outlet valve block 251 is supported on an upper
surface of the support stand 231 to enable the water outlet valve
block 251 to close an upper opening of the water outlet hole
235.
[0107] In a specific embodiment of the present disclosure, as shown
in FIGS. 7, 8 and 9, the positioning strips 2522 are equally spaced
and distributed along the circumferential edge of the central
groove 2331, and the water outlet valve block 251 and two adjacent
positioning strips 2522 are spaced from each other. Specifically,
the diaphragm assembly 25 is positioned on the valve seat 23, in
which the water outlet valve block 251 is arranged corresponding to
the support stand 231 of the water outlet hole 235. When the
diaphragm pump 100 operates to drain water, water flows through the
water outlet hole 235, under the water pressure, the water outlet
valve block 251 covering the water outlet hole 235 is opened, and
the water flows into the water outlet cavity 211. It could be
understood that a thickness of the water outlet valve block 251 is
smaller than the thickness of the positioning strip 2522, and a
raised height of the support stand 231 makes the upper surface of
the support stand 231 just in contact with a lower surface of the
water outlet valve block 251, which ensures sealing
performance.
[0108] In an optional embodiment, referring to FIGS. 7, 8 and 9, a
diaphragm part 254 is provided between the water outlet valve block
251 and the central positioning plate 2521, and an arc groove is
formed at a position where a peripheral edge of the diaphragm part
254 is connected with the positioning strip 2522. It could be
understood that the diaphragm part 254 is thinner than the water
outlet valve block 251, and in a certain range, the thinner
diaphragm part 254 has better elasticity and fatigue durability,
thereby prolonging its service life, and is more sensitive to
pressure, thereby enabling the diaphragm pump 100 to control the
flow precisely.
[0109] In some embodiments of the present disclosure, as shown in
FIG. 3 in combination with FIGS. 4 and 5, the upper cover 22
constructs a downwardly open cavity structure, and an upper annular
partition plate 223 is provided to a bottom surface of the upper
cover 22; the valve seat 23 constructs an upwardly open cavity
structure, and a lower annular partition plate 232 corresponding to
the upper annular partition plate 223 is provided to a top surface
of the valve seat 23.
[0110] Specifically, a bottom of the upper cover 22 is recessed
upwards to form a first groove, and the first groove is divided
into an upper outer groove and an upper inner groove by the upper
annular partition plate 223. An upper surface of the valve seat 23
is recessed downwards to form a second groove corresponding to the
first groove, and the second groove is divided into a lower outer
groove and a lower inner groove by the lower annular partition
plate 232 corresponding to the upper annular partition plate 223.
The upper cover 22 is mounted to the valve seat 23 in a sealing
manner, and the water inlet cavity 212 located outside and the
water outlet cavity 211 located inside are partitioned by the upper
annular partition plate 223 and the lower annular partition plate
232, in which the water inlet cavity 212 is communicated with the
water inlet, and the water outlet cavity 211 is communicated with
the water outlet. That is, the upper annular partition plate 223 of
the upper cover 22 and the lower annular partition plate 232 of the
valve seat 23 are snap-fitted, such that a cavity 21 between the
upper cover 22 and the valve seat 23 is divided into two.
[0111] In some embodiments of the present disclosure, as shown in
FIGS. 1, 2 and 3, the bottom of the water outlet cavity 211 is
provided with the mounting base 230. The diaphragm assembly 25 is
mounted to the mounting base 230, so as to control the opening and
closure of the water outlet hole 235. In other words, the water
outlet cavity 211 is in communication with the water outlet hole
235, and when the capsule cavity 912 is compressed, the water inlet
valve block 26 closes the water inlet hole 236 while the diaphragm
assembly 25 opens the water outlet hole 235, such that the fluid in
the capsule cavity 912 enters the water outlet cavity 211 through
the water outlet hole 235; when the capsule cavity 912 is stretched
and expanded, the water inlet valve block 26 opens the water inlet
hole 236 while the diaphragm assembly 25 closes the water outlet
hole 235, such that the fluid in the water inlet cavity 212 enters
the capsule cavity 912.
[0112] As shown in FIG. 7, the diaphragm assembly 25 includes the
positioning plate 252 and the plurality of water outlet valve
blocks 251. Upper and lower surfaces of the positioning plate 252
are configured as flat surfaces. The water outlet valve block 251
is connected to a peripheral edge of the positioning plate 252 and
extends towards a radial direction of the positioning plate 252. A
distance between the upper surface of the water outlet valve block
251 and the upper surface of the positioning plate 252 is identical
to a distance between the lower surface of the water outlet valve
block 251 and the lower surface of the positioning plate 252.
[0113] In other words, the upper surface and the lower surface of
the diaphragm assembly 25 are symmetrically disposed relative to a
central plane in an up-and-down direction of the diaphragm assembly
25, such that an operator does not need to distinguish front and
back sides when the diaphragm assembly 25 is mounted, thereby
improving the mounting efficiency and reducing the production cost
of the diaphragm pump 100.
[0114] In some optional embodiments, as shown in FIGS. 6, 7, 8 and
9, the mounting base 230 is provided with the mounting groove 233
fitted with the positioning plate 252. For example, the upper
surface of the valve seat 23 is recessed downwards to form the
mounting groove 233 configured to mount and match with the
positioning plate 252, or the upper surface of the valve seat 23
extends upwards to form the mounting groove 233 configured to mount
and match with the positioning plate 252. Thus, the positioning
plate 252 is reliably positioned on the valve seat 23.
[0115] In an optional embodiment of the present disclosure,
referring to FIG. 6, a connecting bridge 234 is provided between
the support stand 231 and the rib 2304, and the connecting bridge
234 is disposed opposite to the diaphragm part 254. An upper
surface of the connecting bridge 234 is flush with the upper
surface of the support stand, such that when the water outlet valve
block 251 is opened upwards, the diaphragm part 254 moves downwards
correspondingly, and since the presence of the connecting bridge
234 serving as a support, the diaphragm part 254 is prevented from
swinging downwards excessively.
[0116] In some embodiments of the present disclosure, referring to
FIGS. 1 and 3, the piston assembly 90 is connected to the bottom of
the valve seat 23 and includes the capsule body 91 having the
capsule cavity 912. The capsule cavity 912 is communicated with the
water inlet cavity 212 and the water outlet cavity 211 through the
water inlet hole 236 and the water outlet hole 235 respectively. A
bottom surface of the cylinder body 24 extends downwards to form a
stopping member 241.
[0117] The connecting rod assembly 30 drives the capsule body 91 to
swing up and down between the upper movement dead point and the
lower movement dead point to squeeze or stretch the capsule cavity
912 to realize the function of pumping the fluid. The connecting
rod assembly 30 includes the connecting rod 31, and the connecting
rod 31 is connected with the capsule body 91. A lower end face of
the stopping member 241 is opposite to and spaced at a
predetermined distance from a central position in a top surface of
the connecting rod 31.
[0118] Specifically, the connecting rod assembly 30 drives the
capsule body 91 to move; when the capsule cavity 912 is compressed
by the connecting rod assembly 30, the water inlet valve block 26
closes the water inlet hole 236 while the diaphragm assembly 25
opens the water outlet hole 235, such that the fluid in the capsule
cavity 912 enters the water outlet cavity 211 through the water
outlet hole 235; when the capsule cavity 912 is stretched and
expanded by the connecting rod assembly 30, the water inlet valve
block 26 opens the water inlet hole 236 while the diaphragm
assembly 25 closes the water outlet hole 235, such that the fluid
in the water inlet cavity 212 enters the capsule cavity 912 through
the water inlet hole 236.
[0119] During the movement of the connecting rod 31 in the
up-and-down direction, due to the presence of the stopping member
241, it is possible to effectively avoid a phenomenon of unstable
flow caused by an upward drifting of the connecting rod 31 when the
connecting rod 31 drives the capsule body 91 to move, and hence a
purpose of precise control over the flow is also achieved.
[0120] For example, the lower end face of the stopping member 241
is spaced apart from the central position in the top surface of the
connecting rod 31 at a distance of 0.1-0.4 mm. That is, the
distance of upward movement of the connecting rod 31 ranges from
0.1 mm to 0.4 mm. That is, the connecting rod 31 squeezes the
capsule cavity 912 upwards at an extent of 0.1-0.4 mm. In other
words, the top surface of the connecting rod 31 is always spaced
from the lower end face of the stopping member 241 at a certain
distance, in which the lower end face of the stopping member 241
represents an upper movement dead point of the connecting rod 31,
and upon the connecting rod 31 touches the lower end face of the
stopping member 241, the connecting rod 31 is restricted from
continuing moving upwards, such that it is possible to ensure that
the amount of compression of the capsule cavity 912 compressed or
stretched by the connecting rod 31 is substantially constant every
time, thereby stabilizing the flow of the diaphragm pump 100.
[0121] In some embodiments of the present disclosure, referring to
FIGS. 12 and 13, the capsule body 91 includes the plurality of
capsule cavities 912, the panel 911 and the mounting column 915.
The plurality of capsule cavities 912 are open upwards. The panel
911 is connected to respective upper edges of the plurality of
capsule cavities 912, such that the plurality of capsule cavities
912 are connected into a whole. The fact that the panel 911
connects the capsule cavities 912 into a whole makes the processing
simple and the mounting efficient, and saves both time and
labor.
[0122] Since the capsule body 91 is frequently squeezed and
stretched, the plurality of capsule cavities 912 of the capsule
body 91 which are integrally molded are associated with each other,
which renders high fatigue durability to the capsule body 91.
[0123] The mounting column 915 is mounted to a bottom of the
capsule cavity 912, and the connecting rod 31 is provided with a
second mounting hole 311 fitted with the mounting column 915. The
mounting column 915 passes through the second mounting hole 311 to
be connected with the connecting rod 31, in which a radial
dimension of the mounting column 915 is greater than a radial
dimension of the second mounting hole 311, such that the connecting
rod 31 during the movement will drive the capsule body 91 to
realize stretch or compression of the capsule body 91.
[0124] In some embodiments of the present disclosure, referring to
FIG. 13, the capsule cavity 912 includes a thin-walled part 914 and
a thick-walled part 913. The upper end of the mounting column 915
is connected with a bottom surface of the thin-walled part 914. A
circumferential edge of a lower end of the thick-walled part 913 is
connected with a circumferential edge of an upper end of the
thin-walled part 914, and a circumferential edge of an upper end of
the thick-walled part 913 is connected with a bottom surface of the
panel 911. It could be understood that due to the connection
between the thin-walled part 914 and the mounting column 915, the
mounting column 915 will drive the thin-walled part 914 to move, in
which case the thin-walled part 914 is required to have good
elasticity and stretchability to achieve the stretch and
compression of the capsule body 91. It is known to all that in a
certain range, a relatively thin object has better elasticity, so
the part connected with the mounting column 915 is designed as the
thin-walled part 914. On the contrary, the upper end of the
thick-walled part 913 is connected with the panel 911, and the
thick-walled part 913 is required to support the capsule cavity
912. Thus, the thick-walled part 913 not only plays a stabilizing
and positioning role, but also ensures that the thick-walled part
913 will not exhibit a phenomenon of distortion or even
displacement during operation of the diaphragm pump 100.
[0125] In some optional embodiments, a wall thickness of the
thick-walled part 913 is larger than that of the thin-walled part
914. The lower end of the thick-walled part 913 is connected with
the upper end of the thin-walled part 914, so the difference in
wall thickness between the thick-walled part 913 and the
thin-walled part 914 should not be too large. For example, when the
difference is 0.2 mm, smooth transition between the thick-walled
part 913 and the thin-walled part 914 can be attained. Thus, the
capsule cavity 912 can have better stability and maintain good
deformability, and hence the diaphragm pump 100 can have a stable
output flow.
[0126] In a specific embodiment of the present disclosure, the
cylinder body 24 has the first mounting hole 243, and the capsule
body 91 is snapped into the first mounting hole 243 and immobilized
relative to the first mounting hole 243.
[0127] In some other optional embodiments of the present
disclosure, as shown in FIG. 10, a second positioning column 242 is
provided to a top surface of the cylinder body 24 and extends
upwards, and the panel 911 is provided with a second positioning
hole 9110 fitted with the second positioning column 242.
[0128] In a specific embodiment of the present disclosure, a radial
dimension of the second positioning column 242 is greater than that
of the second positioning hole 9110.
[0129] In other words, the thick-walled part 913 is in interference
fit with the first mounting hole 243, such that the capsule body 91
will not rotate in a circumferential direction of the first
mounting hole 243 but have a stable mutual positional relationship.
In addition, the second positioning column 242 of the cylinder body
24 passes through the second positioning hole 9110 to be connected
with the capsule body 91, and hence the capsule body 91 will not be
displaced. The interference fit between the second positioning
column 242 and the second positioning hole 9110 ensures stable
connection between the capsule body 91 and the cylinder body
24.
[0130] In some embodiments of the present disclosure, as shown in
FIGS. 1, 2, 3 and 15, the diaphragm pump 100 includes the pump body
20, the piston assembly 90, the water inlet valve block 26 and the
diaphragm assembly 25. The pump body 20 includes the upper cover
22, the valve seat 23 and the cylinder body 24 which are connected
in sequence. The valve seat 23 has the water outlet hole 235, and a
columnar boss 237 is provided to the bottom surface of the valve
seat 23 and extends downwards. The columnar boss 237 has the water
inlet hole 236 penetrating through the bottom and top surfaces of
the valve seat 23. A circumferential wall of the columnar boss 237
extends obliquely from up to down to form a first inclined surface
2370.
[0131] The upper cover 22 and the valve seat 23 construct the water
inlet cavity 212 located outside and the water outlet cavity 211
located inside, the water inlet cavity 212 is communicated with the
capsule cavity 912 through the water inlet hole 236, and the water
outlet cavity 211 is communicated with the capsule cavity 912
through the water outlet hole 235. The water inlet valve block 26
is provided to a bottom surface of the columnar boss 237 to open or
close the water inlet hole 236, and the diaphragm assembly 25 is
provided to the top surface of the valve seat 23 to open or close
the water outlet hole 235.
[0132] As shown in FIG. 12, the piston assembly 90 includes the
capsule body 91 and the panel 911. The capsule body 91 has the
capsule cavity 912 open upwards, and an upper inner circumferential
edge of the capsule cavity 912 extends obliquely from up to down to
form a second inclined surface 9120. The first inclined surface
2370 is closely fitted with the second inclined surface 9120. The
panel 911 is connected to an upper outer circumferential edge of
the capsule cavity 912 and located between the valve seat 23 and
the cylinder body 24.
[0133] Specifically, the upper cover 22 and the valve seat 23 are
fitted to define the water inlet cavity 212 and the water outlet
cavity 211. The connecting rod assembly 30 drives the capsule body
91 to move; when the capsule cavity 912 is compressed by the
connecting rod assembly 30, the water inlet valve block 26 closes
the water inlet hole 236 while the diaphragm assembly 25 opens the
water outlet hole 235, such that the fluid in the capsule cavity
912 enters the water outlet cavity 211 through the water outlet
hole 235; when the capsule cavity 912 is stretched and expanded by
the connecting rod assembly 30, the water inlet valve block 26
opens the water inlet hole 236 while the diaphragm assembly 25
closes the water outlet hole 235, such that the fluid in the water
inlet cavity 212 enters the capsule cavity 912 through the water
inlet hole 236.
[0134] When the valve seat 23 is fastened over the cylinder body
24, as shown in FIGS. 12, 14, 15 and 16, the first inclined surface
2370 of the columnar boss 237 of the valve seat 23 is fitted with
the second inclined surface 9120 of the piston assembly 90
seamlessly. When the connecting rod assembly 30 compresses the
capsule body 91, a small space is defined between the capsule body
91 and the bottom of the valve seat 23, i.e. a compression space of
the capsule cavity 912 is constant, which ensures that the
diaphragm pump 100 can produce sufficient pressure for each
compression, thereby improving working efficiency of the diaphragm
pump 100, and stabilizing the output flow of the diaphragm pump
100.
[0135] Therefore, in the diaphragm pump 100 according to the
present disclosure, since the columnar boss 237 is provided to the
bottom surface of the valve seat 23 and extends downwards, the
circumferential wall of the columnar boss 237 extends obliquely
from up to down to form the first inclined surface 2370, and the
upper inner circumferential edge of the capsule cavity 912 extends
obliquely from up to down to form the second inclined surface 9120,
in which the first inclined surface 2370 is closely fitted with the
second inclined surface 9120, the diaphragm pump 100 can compress
the fluid effectively and its working efficiency can be
improved.
[0136] In some embodiments of the present disclosure, referring to
FIGS. 14, 15 and 16, the columnar boss 237 has a third positioning
hole 2371 configured to immobilize the water inlet valve block 26,
and a plurality of water inlet holes 236 are defined in a
circumferential direction of the third positioning hole 2371.
[0137] In an optional embodiment, as shown in FIG. 17, the water
inlet valve block 26 includes a valve membrane 261 and a third
positioning column 262. The valve membrane 261 covers the water
inlet hole 236, and the third positioning column 262 has a first
end connected to the valve membrane 261 and a second end upwardly
extending through the third positioning hole 2371.
[0138] The third positioning column 262 at an upper end of the
water inlet valve block 26 is disposed through the third
positioning hole 2371, such that the water inlet valve block 26 is
fixedly mounted to the valve seat 23, in which case the valve
membrane 261 at a lower end of the water inlet valve block 26
closes the water inlet hole 236. When the connecting rod assembly
30 stretches the capsule body 91, the water inlet valve block 26
opens the water inlet hole 236 and the fluid is sucked into the
capsule cavity 912. When the diaphragm pump 100 operates, the
plurality of small water inlet holes 236 effectively disperse the
fluid in the water inlet cavity 212, restraining the production of
a turbulent flow, and hence the diaphragm pump 100 can output the
flow rate stably.
[0139] In an optional embodiment, as shown in FIGS. 15 and 17, the
first end of the third positioning column 262 forms an
anti-rotation flange 263, and the third positioning hole 2371 has a
position-limiting groove 2372 fitted with the anti-rotation flange
263. The anti-rotation flange 263 of the water inlet valve block 26
is fitted with the position-limiting groove 2372 of the third
positioning hole 2371 to limit a degree of freedom of the water
inlet valve block 26 in the circumferential direction, such that
the water inlet valve block 26 cannot rotate in the circumferential
direction.
[0140] In another optional embodiment, as shown in FIGS. 3, 16 and
17, the second end of the third positioning column 262 is provided
with a position-limiting protrusion 264, and the position-limiting
protrusion 264 abuts against the top surface of the valve seat 23.
That is, an outer diameter of the position-limiting protrusion 264
is larger than an inner diameter of the third positioning hole
2371, and after the third positioning column 262 passes through the
third positioning hole 2371, a bottom of the position-limiting
protrusion 264 abuts against the top surface of the valve seat 23.
In other words, the water inlet valve block 26 is clamped to the
valve seat 23. A degree of freedom of the water inlet valve block
26 in an axial direction is limited, and the water inlet valve
block 26 cannot be disengaged from the valve seat 23 in the axial
direction. The water inlet valve block 26 is made of a material
having deformability, for example, rubber, such that the
position-limiting protrusion 264 can passes through the third
positioning hole 2371 smoothly after squeezed and deformed.
[0141] In some embodiments of the present disclosure, as shown in
FIG. 14, the columnar boss 237 has an avoidance notch 2373, and an
inlet end of the water outlet hole 235 is arranged opposite to the
avoidance notch 2373. That is, an inlet end face of the water
outlet hole 235 is not in the same plane as an outlet end face of
an outlet end of the water inlet hole 236, so it is ensured that a
water inlet passage and a water outlet passage are effectively
separated.
[0142] In some optional embodiments, as shown in FIGS. 14 and 16,
three columnar bosses 237 are provided to the bottom surface of the
valve seat 23, and constitute an equilateral triangle. Certainly,
it could be understood that the position and number of the columnar
boss 237 is determined based on the position and number of the
capsule cavity 912. Embodiments of the present disclosure are only
explanatory. For example, the number of the columnar bosses 237 can
be set to four, and four columnar bosses 237 constitute a square or
other shapes. The regular arrangement of the columnar bosses 237
allows the valve seat 23 to be processed simply and reduces
material costs.
[0143] In some embodiments of the present disclosure, the
connecting rod assembly 30 for the diaphragm pump 100 includes the
connecting rod 31 and the steel shaft 32, as shown in FIGS. 2, 18,
21 and 23. The connecting rod 31 includes a rod body 312 and a
mounting plate 313. A first end of the rod body 312 is provided
with the connecting hole 3121 extending along an axial direction of
the rod body 312, and the mounting plate 313 is connected to a
second end of the rod body 312. A plurality of connecting arms 314
are spaced along a circumferential direction of the mounting plate
313, and the mounting plate 313 has a plurality of
material-reducing holes 3131. The steel shaft 32 is connected with
the connecting hole 3121.
[0144] Specifically, as shown in FIG. 23, the steel shaft 32 has
the lower end connected with the driving assembly 10 and the upper
end inserted into the connecting hole 3121. An inner diameter D of
the connecting hole 3121 is adapted to a diameter of the steel
shaft 32. For example, the inner diameter D of the connecting hole
3121 can be 1.52 mm. Certainly, the embodiments of the present
disclosure are only explanatory, and the inner diameter D can be
set to other values in the light of practical situations. The
driving assembly 10 drives the steel shaft 32 to rotate, the
plurality of connecting arms 314 are connected to the mounting
column 915 respectively, and the steel shaft 32 drives the
connecting rod 31 to rotate, such that the stretch and compression
of the capsule body 91 by the connecting rod assembly 30 are
realized.
[0145] The inventor finds in practice that since the mounting plate
313 is provided with the connecting hole 3121 in the center, during
a molding process of the connecting rod 31, shrinkage or
insufficient molding may occur to the periphery of the connecting
hole 3121 due to unevenness in thickness, resulting in generation
of air bubbles. In order to solve this problem, the plurality of
material-reducing holes 3131 are provided around the connecting
hole 3121, correspondingly, a loose core is additionally provided
to a mold, and an exhaust passage keeps unobstructed to exhaust
most of the air generated by uneven shrinkage out of the mold, such
that the air bubbles generated during the molding process of the
connecting rod 31 can be reduced.
[0146] For the connecting rod assembly 30 of the diaphragm pump 100
according to the present disclosure, by providing the plurality of
material-reducing holes 3131 in the mounting plate 313, it is
possible to reduce the air bubbles generated during the molding
process of the connecting rod 31 and prolong service life of the
connecting rod 31.
[0147] In some embodiments of the present disclosure, as shown in
FIGS. 18 and 20, the material-reducing hole 3131 is formed by
recessing a top surface of the mounting plate 313 downwardly. The
inventor notes that during the molding process, an upper part of
the connecting rod 31 is finally cooled, and if the
material-reducing hole 3131 is provided in a lower part, the air
cannot be exhausted when liquid metal is solidified and shrunk,
which likewise results in the air bubbles due to an excessive wall
thickness difference. Thus, the material-reducing hole 3131 is
provided in the upper part instead of the lower part.
[0148] In some embodiments, as shown in FIG. 20, the plurality of
connecting arms 314 obliquely extend downwards and outwards from
the central position in the mounting plate 313. In other words, the
connecting arms 314 are not in the same plane, and for example, an
included angle C may be 8 degrees. Certainly, the embodiments of
the present disclosure are only explanatory, and the included angle
C between the connecting arm 314 and the horizontal plane can be
set according to practical situations.
[0149] For example, the connecting rod includes three connecting
arms 314. Since the connecting rod 31 compresses or stretches
different capsule bodies 91 at the same time, the steel shaft 32 is
configured as an eccentric shaft, and correspondingly, the
connecting arms 314 are inclined downwards, such that no matter
which position the steel shaft 32 rotates to, one of the connecting
arms 314 stretches the capsule body 91, another connecting arm 314
compresses the capsule body 91, and the remaining capsule body 91
is either stretched or compressed, thereby realizing water intake
and drainage processes of the diaphragm pump 100. Certainly, the
embodiments of the present disclosure are only explanatory, and for
example, four or more connecting arms 314 can be provided.
[0150] In some other embodiments, referring to FIGS. 19, 21, 22 and
23, a plurality of heat radiating grooves 3122 are provided to a
circumferential face of the connecting hole 3121, and the plurality
of heat radiating grooves 3122 extend along an axial direction of
the connecting hole 3121. During the rotation of the connecting rod
assembly 30, the steel shaft 32 rubs against the connecting rod 31,
generating a lot of heat, and if the heat cannot be discharged in
time, abrasion of the connecting rod assembly 30 will be
aggravated, resulting in failure of the diaphragm pump 100. By
providing the plurality of heat radiating grooves 3122 in a
circumferential direction of the connecting hole 3121, the heat
generated by friction between the steel shaft 32 and the connecting
rod 31 can be discharged in time through the heat radiating grooves
3122, thereby prolonging a process of disabling the connecting rod
assembly 30 due to abrasion and extending service life of the
connecting rod assembly 30.
[0151] In some embodiments of the present disclosure, referring to
FIGS. 18, 20 and 21, a free end of each connecting arm 314 is
provided with a mounting protrusion 3141, and a lower end face of
the mounting protrusion 3141 is lower than a lower end face of the
connecting arm 314. The second mounting hole 311 is provided in the
center of the mounting protrusion 3141, the mounting column 915 of
the capsule body 91 passes through the second mounting hole 311 to
be connected with the connecting rod 31, and an axial dimension of
the second mounting hole 311 matches an axial dimension of the
mounting column 915.
[0152] In some optional embodiments, as shown in FIG. 21, a
reinforcing rib 315 is provided between an outer circumferential
surface of the mounting protrusion 3141 and an outer
circumferential surface of the rod body 312, and the reinforcing
rib 315 extends upwards to be connected to a bottom surface of the
mounting plate 313. Since the lower end face of the mounting
protrusion 3141 is lower than that of the connecting arm 314, a
protruding surface of the mounting protrusion 3141 is too large,
and a connecting surface of the mounting protrusion 3141 itself can
only withstand a limited load. In view of this, the reinforcing rib
315 is additionally provided to a common surface to which the
mounting protrusion 3141 and the rod body 312 are both
perpendicular, so as to enhance strength of a joint surface.
[0153] In some embodiments, as shown in FIGS. 1 and 3, the
connecting rod assembly 30 is provided within the chamber 27. The
connecting rod assembly 30 includes the eccentric wheel 33, the
connecting rod 31 and the steel shaft 32. The eccentric wheel 33 is
provided with an inclined eccentric hole 331 in an axial direction
of the eccentric wheel 33, and the eccentric wheel 33 is connected
with the electric motor shaft 121 of the electric motor 12.
[0154] As shown in FIG. 2, a photoelectric shielding sheet 40 is
integrally formed with the eccentric wheel 33, that is, the
photoelectric shielding sheet 40 and the eccentric wheel 33 are
configured as a whole and are inseparable. Thus, a manufacturing
process of the eccentric wheel 33 can be simplified, reducing
assembly steps, and the photoelectric shielding sheet 40 is
prevented from shaking or even dropping.
[0155] In an optional embodiment, as shown in FIG. 2, the
photoelectric shielding sheet 40 is integrally formed with the
eccentric wheel 33 and rotates synchronously with the eccentric
wheel 33, in which the photoelectric shielding sheet 40 is disposed
to an upper surface of the eccentric wheel 33. The photoelectric
shielding sheet 40 can be provided with an inclined hole 41
corresponding to the eccentric hole 331 of the eccentric wheel 33.
The lower end of the steel shaft 32 is inserted into the inclined
hole 41 and the eccentric hole 331, while the upper end of the
steel shaft 32 is connected with the connecting rod 31.
[0156] A photoelectric sensor 50 is provided to the base seat 11,
and the photoelectric sensor 50 cooperates with the photoelectric
shielding sheet 40, so as to detect a rotational speed of the
electric motor shaft 121 and send a detection signal to an electric
motor controller. The electric motor controller is configured to
adjust the rotational speed of the electric motor shaft 121 of the
electric motor 12 according to the detection signal.
[0157] As shown in FIG. 1 and FIG. 2, the photoelectric sensor 50
is disposed in the chamber 27, and the photoelectric sensor 50 is
provided with a through groove throughout along a rotating piece of
the photoelectric shielding sheet 40. The photoelectric shielding
sheet 40 passes through the through groove when rotating, so as to
detect the rotational speed of the electric motor shaft 121 and
send the detection signal to the electric motor controller, such
that the electric motor controller precisely controls the
rotational speed of the electric motor shaft 121.
[0158] In the diaphragm pump 100 according to embodiments of the
present disclosure, by forming the photoelectric shielding sheet 40
integrally with the eccentric wheel 33, the stability of the
photoelectric shielding sheet 40 during rotation is improved, and
the working noise and production cost of the diaphragm pump 100 is
reduced.
[0159] In an optional embodiment, as shown in FIG. 2, the
photoelectric shielding sheet 40 extends outwards along a radial
direction of the eccentric wheel 33. The photoelectric sensor 50 is
provided to an inner wall face of the base seat 11, and an opening
of the through groove faces the inside. Thus, during the rotation
of the eccentric wheel 33, the photoelectric shielding sheet 40 can
extend into the through groove to play a role of shielding
light.
[0160] In an optional embodiment, as shown in FIG. 1 and FIG. 2,
the photoelectric shielding sheet 40 includes a positioning portion
and a shielding portion. The positioning portion is provided to the
upper surface of the eccentric wheel 33, and the shielding portion
is connected to the positioning portion and extends radially
outwards. The shielding portion can be configured as a fan shape,
but it could be understood that the shape of the shielding portion
is not limited and instead can be configured as other shapes in the
light of practical situations. Thus, in the through groove of the
photoelectric sensor 50, light can be effectively shielded by the
shielding portion, so that the photoelectric sensor 50 can detect
the rotational speed of the electric motor shaft 121
accurately.
[0161] In some further embodiments of the present disclosure, as
shown in FIGS. 24 and 25, the diaphragm pump 100 further includes a
printed circuit board 70. The printed circuit board 70 is provided
to the base seat 11 and connected with the photoelectric sensor 50.
The printed circuit board 70 is provided with a lead wire connector
71, and a lead wire 80 is electrically connected to the printed
circuit board 70 through the lead wire connector 71. One of the
lead wire 80 and the lead wire connector 71 is provided with a lead
wire plug 81, while the other one of the lead wire 80 and the lead
wire connector 71 is provided with a lead wire jack 711, the lead
wire plug 81 being plugged into the lead wire jack 711.
[0162] The lead wire plug 81 may be provided to the lead wire 80.
At the same time, the lead wire jack 711 is provided to the lead
wire connector 71. By plugging the lead wire plug 81 of the lead
wire 80 in the lead wire jack 711 of the lead wire connector 71 to
complete the connection between the lead wire 80 and the lead wire
connector 71, the electrical connection between the lead wire 80
and the printed circuit board 70 can be implemented, such that the
lead wire 80 can transmit electric currents and signals to the
photoelectric sensor 50 to ensure the normal operation of the
diaphragm pump 100. When the lead wire 80 needs to be disassembled
due to maintenance or other reasons, the lead wire 80 can be
removed from the lead wire connector 71 directly. Thus, by
providing the lead wire connector 71 to the printed circuit board
70, the connection and disassembly between the lead wire 80 and the
printed circuit board 70 is convenient, and the cost is low.
[0163] Certainly, the lead wire plug 81 can be provided to the lead
wire connector 71, and at the time the lead wire jack 711 is
provided to the lead wire 80. By plugging the lead wire plug 81 of
the lead wire connector 71 in the lead wire jack 711 of the lead
wire 80, it is also convenient for the connection and disassembly
between the lead wire 80 and the printed circuit board 70, and the
cost of the diaphragm pump 100 is low.
[0164] For the diaphragm pump 100 according to embodiments of the
present disclosure, the precise control over the flow of the
diaphragm pump may be achieved; and by providing the lead wire
connector 71 to the printed circuit board 70 and by plugging the
lead wire plug 81 provided to one of the lead wire 80 and the lead
wire connector 71 into the lead wire jack 7111 provided to the
other one of the lead wire 80 and the lead wire connector 71, it is
convenient for the connection and disassembly between the lead wire
80 and the printed circuit board 70, and the cost is low.
[0165] Other constructions of the diaphragm pump 100 according to
embodiments of the present disclosure are well known to those
skilled in the art and will not be elaborated herein.
[0166] In the specification, it is to be understood that terms such
as "upper," "lower," "bottom," "inner," "outer," should be
construed to refer to the orientation as then described or as shown
in the drawings under discussion. These relative terms are for
convenience of description and do not require that the present
invention be constructed or operated in a particular orientation,
thus these relative terms should not be construed as a limit to the
present disclosure. In the present invention, unless specified or
limited otherwise, a structure in which a first feature is "on" or
"below" a second feature may include an embodiment in which the
first feature is in direct contact with the second feature, and may
also include an embodiment in which the first feature and the
second feature are not in direct contact with each other, but are
contacted via an additional feature formed therebetween.
Furthermore, a first feature "on," "above," or "on top of" a second
feature may include an embodiment in which the first feature is
right or obliquely "on," "above," or "on top of" the second
feature, or just means that the first feature is at a height higher
than that of the second feature; while a first feature "below,"
"under," or "on bottom of" a second feature may include an
embodiment in which the first feature is right or obliquely
"below," "under," or "on bottom of" the second feature, or just
means that the first feature is at a height lower than that of the
second feature.
[0167] Reference throughout this specification to "an embodiment,"
"some embodiments," "an example," "a specific example," or "some
examples" means that a particular feature, structure, material, or
characteristic described in connection with the embodiment or
example is included in at least one embodiment or example of the
present disclosure. Thus, the appearances of the phrases such as
"in some embodiments," "in one embodiment", "in an embodiment", "in
another example," "in an example," "in a specific example," or "in
some examples," in various places throughout this specification are
not necessarily referring to the same embodiment or example of the
present disclosure. Furthermore, the particular features,
structures, materials, or characteristics may be combined in any
suitable manner in one or more embodiments or examples.
[0168] Although explanatory embodiments have been shown and
described, it would be appreciated by those skilled in the art that
the above embodiments cannot be construed to limit the present
disclosure, and changes, modifications, alternatives and variants
can be made in the embodiments without departing from spirit,
principles and scope of the present disclosure.
* * * * *