U.S. patent application number 15/763844 was filed with the patent office on 2018-10-04 for centrifugl pump.
The applicant listed for this patent is FOSHAN WEILING WASHER MOTOR MANUFACTURING CO., LTD.. Invention is credited to Chuang CHI, Wenhai GU, Changzhong SHI, Qiuhong WU.
Application Number | 20180283399 15/763844 |
Document ID | / |
Family ID | 54797354 |
Filed Date | 2018-10-04 |
United States Patent
Application |
20180283399 |
Kind Code |
A1 |
GU; Wenhai ; et al. |
October 4, 2018 |
CENTRIFUGL PUMP
Abstract
A centrifugal pump (100) comprises a pump housing (1), a heating
device (22), a flow guide member (3) and an impeller (4). The pump
housing (1) is provided with a heating chamber (11) and a pump
chamber (12) in communication with the heating chamber (11)
therein. The pump housing (1) is provided with an inlet (130) in
communication with the heating chamber (11) and an outlet (140) in
communication with the pump chamber (12). The heating device (22)
is disposed on the pump housing (1). The flow guide member (3) is
disposed within the heating chamber (11). The flow guide member (3)
defines spreading channels guiding fluids entering through the
inlet (130) to spread outwards along a radial direction of the
heating device (22) and converging channels guiding the spread
fluids to converge inwards along the radial direction of the
heating device (22) to the pump chamber (12) in the heating chamber
(11). The impeller (4) is disposed within the pump chamber (12) and
guides the fluids converged in the pump chamber (12) to the outlet
(140). The centrifugal pump structure is compact and small-sized,
thus having a high space utilization rate and also good hydraulic
performance.
Inventors: |
GU; Wenhai; (Foshan, CN)
; WU; Qiuhong; (Foshan, CN) ; SHI; Changzhong;
(Foshan, CN) ; CHI; Chuang; (Foshan, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FOSHAN WEILING WASHER MOTOR MANUFACTURING CO., LTD. |
Foshan |
|
CN |
|
|
Family ID: |
54797354 |
Appl. No.: |
15/763844 |
Filed: |
December 3, 2015 |
PCT Filed: |
December 3, 2015 |
PCT NO: |
PCT/CN2015/096349 |
371 Date: |
March 28, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04D 29/58 20130101;
F04D 29/08 20130101; F04D 29/426 20130101; F04D 29/588 20130101;
F04D 29/42 20130101; F04D 29/5866 20130101; F04D 29/4273 20130101;
F04D 29/44 20130101; F04D 29/445 20130101 |
International
Class: |
F04D 29/58 20060101
F04D029/58; F04D 29/44 20060101 F04D029/44; F04D 29/08 20060101
F04D029/08 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 29, 2015 |
CN |
201510640802.3 |
Claims
1. A centrifugal pump, comprising: a pump housing, internally
defining a heating chamber and a pump chamber in communication with
the heating chamber, and provided with an inlet in communication
with the heating chamber and an outlet in communication with the
pump chamber; a heating device, provided on the pump housing; a
flow guide member, provided in the heating chamber and defining a
spreading channel and a converging channel in the heating chamber,
the spreading channel being configured to guide fluid entering
through the inlet to spread outwards along a radial direction of
the heating device, and the converging channel being configured to
guide the spread fluid to converge inwards along the radial
direction of the heating device to the pump chamber; and an
impeller, provided in the pump chamber and configured to guide the
fluid converged in the pump chamber to the outlet.
2. The centrifugal pump according to claim 1, wherein the spreading
channel guides the fluid entering through the inlet to spread
spirally outwards along the radial direction of the heating device,
and the converging channel guides the spread fluid to converge
spirally inwards along the radial direction of the heating device
to the pump chamber.
3. The centrifugal pump according to claim 1, wherein the flow
guide member comprises: a separating plate; a plurality of spiral
vanes provided at a side of the separating plate facing the heating
device, and defining the spreading channel at the side of the
separating plate facing the heating device; and a plurality of
reverse spiral vanes provided at another side of the separating
plate facing the pump chamber, and defining the converging channel
at the another side of the separating plate facing the pump
chamber.
4. The centrifugal pump according to claim 3, wherein a first of
the spiral vanes and the reverse spiral vanes are shifted clockwise
from inside to outside along a radial direction of the separating
plate, whereas a second of the spiral vanes and the reverse spiral
vanes are shifted counterclockwise from inside to outside along the
radial direction of the separating plate.
5. The centrifugal pump according to claim 3, wherein the plurality
of reverse spiral vanes are connected to a bottom wall of the
heating chamber, the plurality of spiral vanes are connected to the
separating plate, and the separating plate is supported on the
plurality of reverse spiral vanes.
6. The centrifugal pump according to claim 5, wherein the plurality
of reverse spiral vanes are integrally formed on the pump housing,
and the plurality of spiral vanes are integrally formed on the
separating plate.
7. The centrifugal pump according to claim 5, wherein the
separating plate is provided with a positioning hole, the reverse
spiral vane is provided with a positioning column, and the
positioning column is fitted in the positioning hole.
8. The centrifugal pump according to claim 7, wherein a plurality
of positioning columns are provided and disposed to inner ends of
corresponding reverse spiral vanes, a plurality of positioning
holes are provided and spaced along a circumferential direction of
the separating plate, and the plurality of positioning columns are
fitted in the plurality of positioning holes respectively.
9. The centrifugal pump according to claim 3, wherein the plurality
of reverse spiral vanes and the plurality of spiral vanes are
connected to the separating plate, and the plurality of reverse
spiral vanes are supported on a bottom wall of the heating
chamber.
10. The centrifugal pump according to claim 9, wherein the
plurality of reverse spiral vanes, the plurality of spiral vanes
and the separating plate are integrally formed.
11. The centrifugal pump according to claim 3, wherein the pump
housing has an inlet pipe extending into the heating chamber, the
inlet is provided in the inlet pipe, inner ends of the spiral vanes
are provided with engaging notches, and an end of the inlet pipe
that extends into the heating chamber is fitted in the engaging
notches of the plurality of spiral vanes.
12. The centrifugal pump according to claim 3, wherein a side
surface of the separating plate facing the heating device is
provided with a flow guide block in a center of the side surface,
and the flow guide block is configured to guide the fluid entering
through the inlet to the plurality of spiral vanes.
13. The centrifugal pump according to claim 12, wherein the flow
guide block is conical, and a vertex of the flow guide block is
rounded off
14. The centrifugal pump according to claim 3, wherein an outer
peripheral edge of the separating plate is more adjacent to the
heating device compared with that the outer peripheral edge of the
separating plate is adjacent to the pump chamber, and a center of
the separating plate is more adjacent to the pump chamber compared
with that the center of the separating plate is adjacent to the
heating device.
15. The centrifugal pump according to claim 1, wherein a central
axis of the inlet, a central axis of the pump housing, a central
axis of the heating device, a central axis of the flow guide
member, and a central axis of the impeller coincide with each
other; the heating chamber and the pump chamber are communicated at
the central axis of the pump housing; the outlet is provided in an
outer peripheral wall of the pump housing, and a central axis of
the outlet is tangent to the outer peripheral wall of the pump
housing.
16. The centrifugal pump according to claim 1, wherein the pump
housing comprises: a housing body, the heating chamber and the pump
chamber being defined in the housing body, and the outlet being
provided in the housing body; a casing body, detachably mounted to
the housing body and pressing the heating device to an upper end of
the housing body; and an inlet pipe, the inlet pipe being provided
on the casing body, and the inlet being provided in the inlet
pipe.
17. The centrifugal pump according to claim 1, wherein the heating
device is configured as an annular heating plate having a central
through hole, and a position of the central through hole
corresponds to a position of the inlet in a vertical direction.
18. The centrifugal pump according to claim 17, wherein at least
one of an upper surface and an outer peripheral surface of the
heating device is provided with a resistance coating.
19. The centrifugal pump according to claim 17, wherein a seal ring
is provided between an inner peripheral edge of the heating device
and the pump housing for sealing, and another seal ring is provided
between an outer peripheral edge of the heating device and the pump
housing for sealing, and a thermal insulation member is provided
between the inner peripheral edge and/or the outer peripheral edge
of the heating device and the corresponding seal ring.
20. The centrifugal pump according to claim 1, further comprising:
a terminal box, provided on the heating device; and a wiring
terminal, provided in the terminal box, electrically coupled with
the heating device, and exposed out of the pump housing.
Description
FIELD
[0001] The present disclosure relates to a field of pumping
technology, more particularly to a centrifugal pump.
BACKGROUND
[0002] In the related art, a heating device and a pumping device
are usually provided in a case of fluids to be heated and then
pumped, which makes an apparatus have complex structure, large
volume and low space utilization rate. Thus, an apparatus where a
heating device is completely or partially buried in a pump housing
to combine the heating device with a pumping device emerges, but
the heater can only be machined into a regular circle, such that
the pump housing cannot be designed in a spiral shape, and
hydraulic performance is poor.
SUMMARY
[0003] The present disclosure seeks to solve at least one of the
problems existing in the related art. For this reason, the present
disclosure provides a centrifugal pump that has a simple structure,
good hydraulic performance and high heating efficiency.
[0004] The centrifugal pump according to embodiments of the present
disclosure includes: a pump housing, internally defining a heating
chamber and a pump chamber in communication with the heating
chamber, and provided with an inlet in communication with the
heating chamber and an outlet in communication with the pump
chamber; a heating device, provided on the pump housing; a flow
guide member, provided in the heating chamber and defining a
spreading channel and a converging channel in the heating chamber,
the spreading channel being configured to guide fluid entering
through the inlet to spread outwards along a radial direction of
the heating device, and a the converging channel being configured
to guide the spread fluid to converge inwards along the radial
direction of the heating device to the pump chamber; and an
impeller, provided within the pump chamber and configured to guide
the fluid converged in the pump chamber to the outlet.
[0005] For the centrifugal pump according to embodiments of the
present disclosure, the structure of the centrifugal pump is
compact, and the volume thereof is small, thereby improving a space
utilization rate. Meanwhile, since the heating device does not
interfere with the shape design of the pump housing surrounding the
impeller, the pump housing surrounding the impeller can be designed
in a spiral shape, so as to achieve good hydraulic performance.
Additionally, the loss due to curves of the fluid entering via the
inlet is reduced, and the fluid can be sufficiently heated by the
heating device, so as to improve the heating efficiency of the
fluid.
[0006] According to some embodiments of the present disclosure, the
spreading channel guides the fluid entering through the inlet to
spread spirally outwards along the radial direction of the heating
device, and the converging channel guides the spread fluid to
converge spirally inwards along the radial direction of the heating
device to the pump chamber.
[0007] According to some embodiments of the present disclosure, the
flow guide member includes: a separating plate; a plurality of
spiral vanes provided at a side of the separating plate facing the
heating device, and defining the spreading channel at the side of
the separating plate facing the heating device; and a plurality of
reverse spiral vanes provided at another side of the separating
plate facing the pump chamber, and defining the converging channel
at the another side of the separating plate facing the pump
chamber.
[0008] According to some further embodiments of the present
disclosure, one kind of the spiral vanes and the reverse spiral
vanes is shifted clockwise from inside to outside along a radial
direction of the separating plate, while the other one thereof is
shifted counterclockwise from inside to outside along the radial
direction of the separating plate.
[0009] According to some embodiments of the present disclosure, the
plurality of reverse spiral vanes are connected to a bottom wall of
the heating chamber, the plurality of spiral vanes are connected to
the separating plate, and the separating plate is supported on the
plurality of reverse spiral vanes.
[0010] In one embodiment, the plurality of reverse spiral vanes are
integrally formed on the pump housing, and the plurality of spiral
vanes are integrally formed on the separating plate.
[0011] In one embodiment, the separating plate is provided with a
positioning hole, the reverse spiral vane is provided with a
positioning column, and the positioning column is fitted in the
positioning hole.
[0012] In one embodiment, a plurality of positioning columns are
provided and disposed to inner ends of corresponding reverse spiral
vanes, a plurality of positioning holes are provided and spaced
along a circumferential direction of the separating plate, and the
plurality of positioning columns are fitted in the plurality of
positioning holes respectively.
[0013] In some other embodiments of the present disclosure, the
plurality of reverse spiral vanes and the plurality of spiral vanes
are connected to the separating plate, and the plurality of reverse
spiral vanes are supported on a bottom wall of the heating
chamber.
[0014] Further, the plurality of reverse spiral vanes, the
plurality of spiral vanes and the separating plate are integrally
formed.
[0015] In one embodiment of the present disclosure, the pump
housing has an inlet pipe extending into the heating chamber, the
inlet is provided in the inlet pipe, inner ends of the spiral vanes
are provided with engaging notches, and an end of the inlet pipe
that extends into the heating chamber is fitted in the engaging
notches of the plurality of spiral vanes.
[0016] In an embodiment of the present disclosure, a side surface
of the separating plate facing the heating device is provided with
a flow guide block in a center of the side surface, and the flow
guide block is configured to guide the fluid entering through the
inlet to the plurality of spiral vanes.
[0017] Further, the flow guide block is conical, and a vertex of
the flow guide block is rounded off.
[0018] In some embodiments of the present disclosure, an outer
peripheral edge of the separating plate is more adjacent to the
heating device compared with that the outer peripheral edge of the
separating plate is adjacent to the pump chamber, and a center of
the separating plate is more adjacent to the pump chamber compared
with that the center of the separating plate is adjacent to the
heating device.
[0019] According to some embodiments of the present disclosure, a
central axis of the inlet, a central axis of the pump housing, a
central axis of the heating device, a central axis of the flow
guide member, and a central axis of the impeller coincide with each
other; the heating chamber and the pump chamber are communicated at
the central axis of the pump housing; the outlet is provided in an
outer peripheral wall of the pump housing, and a central axis of
the outlet is tangent to the outer peripheral wall of the pump
housing.
[0020] According to some embodiments of the present disclosure, the
pump housing includes: a housing body, the heating chamber and the
pump chamber being defined in the housing body, and the outlet
being provided in the housing body; a casing body, detachably
mounted to the housing body and pressing the heating device to an
upper end of the housing body; and an inlet pipe, the inlet pipe
being provided on the casing body, and the inlet being provided in
the inlet pipe.
[0021] According to some embodiments of the present disclosure, the
heating device is configured as an annular heating plate having a
central through hole, and a position of the central through hole
corresponds to a position of the inlet in a vertical direction.
[0022] According to some embodiments of the present disclosure, at
least one of an upper surface and an outer peripheral surface of
the heating device is provided with a resistance coating.
[0023] According to some embodiments of the present disclosure, a
seal ring is provided between an inner peripheral edge of the
heating device and the pump housing for sealing, and another seal
ring is provided between an outer peripheral edge of the heating
device and the pump housing for sealing, and a thermal insulation
member is provided between the inner peripheral edge and/or the
outer peripheral edge of the heating device and the corresponding
seal ring.
[0024] According to some embodiments of the present disclosure, the
centrifugal pump further includes: a terminal box, provided on the
heating device; and a wiring terminal, provided in the terminal
box, electrically coupled with the heating device, and exposed out
of the pump housing.
[0025] Additional aspects and advantages of embodiments of present
disclosure will be given in part in the following descriptions,
become apparent in part from the following descriptions, or be
learned from the practice of the embodiments of the present
disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0026] FIG. 1 is an exploded view of a centrifugal pump according
to an embodiment of the present disclosure.
[0027] FIG. 2 is a perspective view of a centrifugal pump according
to an embodiment of the present disclosure.
[0028] FIG. 3 is a front view of a centrifugal pump according to an
embodiment of the present disclosure.
[0029] FIG. 4 is a sectional view taken along line A-A in FIG.
3.
[0030] FIG. 5 is a left view of a centrifugal pump according to an
embodiment of the present disclosure.
[0031] FIG. 6 is a top view of a centrifugal pump according to an
embodiment of the present disclosure.
[0032] FIG. 7 is a perspective view of a separating plate and
spiral vanes of a flow guide member of a centrifugal pump according
to an embodiment of the present disclosure.
[0033] FIG. 8 is a front view of a separating plate and spiral
vanes of a flow guide member of a centrifugal pump according to an
embodiment of the present disclosure.
[0034] FIG. 9 is a top view of a separating plate and spiral vanes
of a flow guide member of a centrifugal pump according to an
embodiment of the present disclosure.
[0035] FIG. 10 is an exploded view of a centrifugal pump according
to another embodiment of the present disclosure.
[0036] FIG. 11 is a perspective view of a flow guide member of a
centrifugal pump according to another embodiment of the present
disclosure.
[0037] FIG. 12 is a front view of a flow guide member of a
centrifugal pump according to another embodiment of the present
disclosure.
[0038] FIG. 13 is a top view of a flow guide member of a
centrifugal pump according to another embodiment of the present
disclosure.
[0039] FIG. 14 is a sectional view of a pump heater according to a
first embodiment of the present disclosure.
[0040] FIG. 15 is a perspective view of a casing of the pump heater
according to the first embodiment of the present disclosure.
[0041] FIG. 16 is a perspective view at a heating plate of the pump
heater according to the first embodiment of the present
disclosure.
[0042] FIG. 17 is a perspective view of a pump heater according to
a second embodiment of the present disclosure.
[0043] FIG. 18 is a sectional view of the pump heater according to
the second embodiment of the present disclosure.
REFERENCE NUMERALS
[0044] centrifugal pump 100,
[0045] pump housing 1, heating chamber 11, pump chamber 12, inlet
pipe 13, inlet 130, housing body 14, outlet 140,
[0046] pump heater 200, casing 21, casing body 211, heating device
22, upper space 201, lower space 202,
[0047] flow guide member 3, separating plate 31, positioning hole
310, flow guide block 311, spiral vane 32, engaging notch 320,
reverse spiral vane 33, positioning column 331, impeller 4,
[0048] seal ring 5, first seal ring 51, second seal ring 52,
thermal insulation member 6, first thermal insulation member 61,
second thermal insulation member 62, wiring terminal 7, terminal
box 8.
DETAILED DESCRIPTION
[0049] Embodiments of the present disclosure will be described in
detail and examples of the embodiments will be illustrated in the
drawings, where same or similar reference numerals are used to
indicate same or similar members or members with same or similar
functions. The embodiments described herein with reference to
drawings are explanatory, and used to generally understand the
present disclosure. The embodiments shall not be construed to limit
the present disclosure.
[0050] A centrifugal pump 100 according to embodiments of the
present disclosure will be described with reference to FIGS. 1 to
13, and the centrifugal pump 100 is suitable for various
applications, such as fluid transportation, cooling systems and
domestic appliances, and has advantages of a compact structure, a
small volume, and good hydraulic performance.
[0051] As shown in FIGS. 1 to 13, the centrifugal pump 100
according to embodiments of the present disclosure includes a pump
housing 1, a heating device 22, a flow guide member 3 and an
impeller 4.
[0052] In one embodiment, the pump housing 1 internally defines a
heating chamber 11 and a pump chamber 12 in communication with the
heating chamber 11, and the pump housing 1 is provided with an
inlet 130 in communication with the heating chamber 11 and an
outlet 140 in communication with the pump chamber 140. The heating
device 22 is disposed on the pump housing 1 and has at least a part
located in the heating chamber 11. For example, a lower surface of
the heating device 22 is formed as a top wall of the heating
chamber 11, such that fluid in the heating chamber 11 can be heated
by the heating device 22. In one embodiment, the heating device 22
is annular and employs a thick-film resistor for heating, thereby
achieving high heating efficiency. The flow guide member 3 is
disposed within the heating chamber 11, and the flow guide member 3
defines a spreading channel and a converging channel in the heating
chamber 11, in which the spreading channel guides the fluid
entering through the inlet 130 to spread spirally outwards along a
radial direction of the heating device 22, while the converging
channel guides the spread fluid to converge spirally inwards along
the radial direction of the heating device 22 to the pump chamber
12. The impeller 4 is disposed within the pump chamber 12 and
guides the fluid converged in the pump chamber 12 to the outlet
140.
[0053] A heating and pumping process in the centrifugal pump 100
according to embodiments of the present disclosure will be
described with reference to the drawings.
[0054] The fluid flows along the spreading channel after entering
the heating chamber 11 via the inlet 130, and at this time, the
flow of the fluid spreads from inside to outside along the radial
direction of the heating device 22. Afterwards, the fluid spread by
the spreading channel flows into the converging channel, and at
this time, the flow of the fluid converges from outside to inside
along the radial direction of the heating device 22. In such a way,
resistance due to curves to the fluid flow and the resulting fluid
loss due to curves are reduced; and since the fluid spreads
outwards along the radial direction of the heating device 22, the
fluid can flow through the lower surface of the heating device 22
and get full contact with the heating device 22, enlarging a heated
area of the fluid, and finally, the heated fluid converges into the
pump chamber 12 and then flows to the outlet 140 under the guidance
of the impeller 4.
[0055] For the centrifugal pump 100 according to the embodiments of
the present disclosure, by providing the heating device 22 within
the heating chamber 11 and providing the impeller 4 within the pump
chamber 12, a heating function and a pumping function are
integrated, and the centrifugal pump 100 has the compact structure
and the small volume, improving a space utilization rate of the
centrifugal pump 100. Furthermore, the flow guide member 3 enables
the heating device 22 not to interfere with a shape design of the
pump housing 1 surrounding the impeller 4, that is, the pump
housing 1 surrounding the impeller 4 can be designed in a spiral
shape to enhance the hydraulic performance of the centrifugal pump
100. Additionally, the flow guide member 3 is employed, not only
the fluid loss due to curves is reduced, but also the fluid can be
heated by the heating device 22 sufficiently, so as to enhance the
heating efficiency for the fluid.
[0056] In an embodiment shown in FIGS. 1 and 4, the spreading
channel can guide the fluid entering via the inlet to spread
spirally outwards along the radial direction of the heating device
22, and the converging channel can guide the spread fluid to
converge spirally inwards along the radial direction of the heating
device 22 to the pump chamber 12. In other words, the spreading
channel can be formed as a spiral spreading channel, and the
converging channel can be formed as a spiral converging channel, so
as to further reduce the fluid loss due to curves, and make the
fluid flow through the lower surface of the heating device 22 more
fully, thereby further improving the heating efficiency of the
centrifugal pump 100.
[0057] As shown in FIG. 1 and FIGS. 10-12, according to some
embodiments of the present disclosure, the flow guide member 3 can
include a separating plate 31, a plurality of spiral vanes 32 and a
plurality of reverse spiral vanes 33. The plurality of spiral vanes
32 are disposed at a side of the separating plate 31 facing the
heating device 22 (e.g. an upper side of the separating plate 31
illustrated in the drawings), and the plurality of spiral vanes 32
define the spreading channel at the upper side of the separating
plate 31. The plurality of reverse spiral vanes 33 are disposed at
another side of the separating plate 31 facing the pump chamber 12
(e.g. a lower side of the separating plate 31 illustrated in the
drawings), and the plurality of reverse spiral vanes 33 define the
converging channel at the lower side of the separating plate 31.
Thus, the entering fluid via the inlet 130 spreads spirally
outwards along the radial direction of the heating device 22 under
the guidance of the spreading channel, and the spread fluid flows
into the converging channel individually, thereby further enhancing
the heating efficiency of the fluid.
[0058] In a further embodiment of the present disclosure, one kind
of the spiral vanes 32 and the reverse spiral vanes 33 can be
shifted clockwise outwards from inside to outside along a radial
direction of the separating plate 31, and the other one thereof can
be shifted counterclockwise from inside to outside along the radial
direction of the separating plate 31, such that the fluid can
spread spirally from inside to outside under the guidance of the
spreading channel and converge spirally from outside to inside
under the guidance of the converging channel, and the spread fluid
has a reduced loss due to curves at a junction of the spreading
channel and the converging channel. For example, as illustrated in
FIG. 1, the spiral vanes 32 can be shifted clockwise from inside to
outside along the radial direction of the separating plate 31, and
the reverse spiral vanes 33 can be shifted counterclockwise from
inside to outside along the radial direction of the separating
plate 31. Certainly, it is also possible that the spiral vanes 32
are shifted counterclockwise from inside to outside along the
radial direction of the separating plate 31, and the reverse spiral
vanes 33 are shifted clockwise from inside to outside along the
radial direction of the separating plate 31.
[0059] As illustrated in FIGS. 1, 4, 7 and 9, in some embodiments
of the present disclosure, the plurality of reverse spiral vanes 33
can be connected to a bottom wall of the heating chamber 11, the
plurality of spiral vanes 32 can be connected to the separating
plate 31, and the separating plate 31 is supported on the plurality
of reverse spiral vanes 33, that is, the flow guide member 3 has a
split structure, such that the flow guide member 3 can be mounted
and positioned in the heating chamber 11.
[0060] In one embodiment, as illustrated in FIG. 1, the plurality
of reverse spiral vanes 33 can be integrally formed on the pump
housing 1, and the plurality of spiral vanes 32 are integrally
formed on the separating plate 31, so as to further simplify the
structure of the centrifugal pump 100 and shorten an assembly
process of the flow guide member 3.
[0061] In one embodiment, as illustrated in FIG. 1 and FIGS. 7-9,
the separating plate 31 can define a positioning hole 310, the
reverse spiral vane 33 can be provided with a positioning column
331, and the positioning column 331 is fitted in the positioning
hole 310, such that the separating plate 31 can be firmly supported
on the reverse spiral vane 33. For example, as illustrated in the
drawings, the positioning column 331 can be formed in the shape of
a substantially rectangular parallelepiped, while the positioning
hole 310 can be formed as a substantially rectangular hole, so as
to facilitate the processing. Certainly, the positioning column 331
can also be a long cylinder, and the positioning hole 310 can be
formed as a circular hole, which will not be particularly defined,
as long as the positioning column 331 and the positioning hole 310
can be fitted together.
[0062] As preferred, a plurality of positioning columns 331 can be
provided and disposed to respective inner ends of corresponding
reverse spiral vanes 33, a plurality of positioning holes 310 can
be provided and spaced along a circumferential direction of the
separating plate 31, and the plurality of positioning columns 331
are fitted in the plurality of positioning holes 310 respectively,
so that the connection between the separating plate 31 and the
reverse spiral vane 33 is firmer. For example, as illustrated in
FIG. 1, only one of two adjacent reverse spiral vanes 33 is
provided with the positioning column 331, that is, the two adjacent
positioning columns 331 are spaced apart by one reverse spiral vane
33 without the positioning column 331. The plurality of positioning
holes 310 corresponding to the plurality of positioning columns 331
are distributed and spaced along the circumferential direction of
the separating plate 31, so as to facilitate the connection between
the separating plate 31 and the reverse spiral vane 33.
[0063] In some other embodiments as shown in FIGS. 10-13, the
plurality of reverse spiral vanes 33 and the plurality of spiral
vanes 32 are connected to the separating plate 31, and the
plurality of reverse spiral vanes 33 are supported on the bottom
wall of the heating chamber 11, that is, the flow guide member 3 is
an integral piece, thereby facilitating the assembly of the flow
guide member 3. In one embodiment, as illustrated in FIG. 11, the
plurality of reverse spiral vanes 33, the plurality of spiral vanes
32, and the separating plate 31 can be integrally formed, so as to
simplify a production process of the flow guide member 3 and
improve assembly efficiency of the centrifugal pump 100.
[0064] As illustrated in FIGS. 1 to 6, in one embodiment of the
present disclosure, the pump housing 1 has an inlet pipe 13 with
the inlet 130 provided in the inlet pipe 13, a lower end of the
inlet pipe 13 extends into the heating chamber 11, an inner end of
the spiral vane 32 is provided with an engaging notch 320, and the
lower end of the inlet pipe 13 is fitted in the engaging notches
320 of the plurality of spiral vanes 32. For example, as
illustrated in FIG. 7, the engaging notch 320 can run through an
inner end face of the spiral vane 32, such that the inlet pipe 13
can be fitted in the engaging notches 320 of the plurality of
spiral vanes 32 more stably.
[0065] In embodiments shown in FIGS. 1, 4, 7 and 10-11, a side
surface of the separating plate 31 facing the heating device 22 (an
upper surface of the separating plate 31 as shown in the drawings)
can be provided with a flow guide block 311 in a center of the side
surface, such that the fluid entering through the inlet 130 can
flow to the plurality of spiral vanes 32 under the guidance of the
flow guide block 311. In one embodiment, the flow guide block 311
can be conical, and a vertex of the flow guide block 311 is rounded
off, such the fluid can be dispersed around the flow guide block
311 when falling onto the vertex of the flow guide block 311, and
hence the fluid can flow into the spreading channel smoothly.
[0066] In some embodiments of the present disclosure, an outer
peripheral edge of the separating plate 31 is more adjacent to the
heating device 22 compared with that the outer peripheral edge of
the separating plate 31 is adjacent to the pump chamber 12, and a
center of the separating plate 31 is more adjacent to the pump
chamber 12 compared with that the center of the separating plate 31
is adjacent to the heating device 22, that is, the separating plate
31 is funnel-shaped. For example, as illustrated in FIGS. 4, 8 and
12, the separating plate 31 is recessed downwards and inwards along
the radial direction, the outer peripheral edge of the separating
plate 31 is located above the center of the separating plate 31,
and a longitudinal section of the separating plate 31 forms a
substantially tapered face, such that the fluid can be fully heated
by the heating device 22, thereby further enhancing the heating
efficiency of the fluid. Certainly, it could be understood that the
separating plate 31 can also extend along a horizontal direction,
such that the separating plate 31 has a simple structure and is
easy to produce and process.
[0067] As illustrated in FIG. 4, according to some embodiments of
the present disclosure, a central axis of the inlet 130, a central
axis of the pump housing 1, a central axis of the heating device
22, a central axis of the flow guide member 3 and a central axis of
the impeller 4 are oriented along an up-and-down direction and
coincide with each other. The heating chamber 11 is located above
the pump chamber 12, and the heating chamber 11 and the pump
chamber 12 are communicated at the central axis of the pump housing
1. Therefore, the structure of the centrifugal pump 100 is
simplified, the volume thereof is reduced, and the hydraulic
performance thereof is excelled. Referring to FIG. 6, the outlet
140 can be provided in an outer peripheral wall of the pump housing
1, a central axis of the outlet 140 is tangent to the outer
peripheral wall of the pump housing 1, and in such a case the pump
housing 1 surrounding the impeller 4 is designed in a spiral shape,
thereby further improving the hydraulic performance of the
centrifugal pump 100.
[0068] According to some embodiments of the present disclosure, the
pump housing 1 can include a housing body 14, a casing body 211,
and an inlet pipe 13. The heating chamber 11 and the pump chamber
12 are defined in the housing body 14, and the outlet 140 is
provided in the housing body 14. The casing body 211 is detachably
mounted to the housing body 14 and presses the heating device 22 to
an upper end of the housing body 14. The inlet pipe 13 is provided
on the casing body 211, and the inlet 130 is provided in the inlet
pipe 13. In such a way, various components of the centrifugal pump
100 can be assembled and disassembled conveniently. For example, as
illustrated in FIGS. 1-4 and FIG. 10, the heating device 22 is
located at the upper end of the housing body 14, the casing body
211 is pressed on an upper surface of the heating device 22, and
the heating chamber 11 is located above the pump chamber 12, such
that the fluid flows into the pump chamber 12 under the action of
gravity after heated by the heating device 22. It could be
understood that the casing body 211 can be structurally fitted with
the housing body 14, or can be connected with the housing body 14
by means of a fastener.
[0069] The centrifugal pump 100 according to one embodiment of the
present disclosure will be described with reference to FIGS. 1-9,
and it could be understood that the following description is only
explanatory and is not constructed to limit the present
disclosure.
[0070] As illustrated in FIGS. 1-9, the centrifugal pump 100
according the embodiment of the present disclosure includes the
pump housing 1, the heating device 22, the flow guide member 3 and
the impeller 4.
[0071] In one embodiment, the pump housing 1 includes the housing
body 14, the casing body 211 and the inlet pipe 13. The heating
chamber 11 and the pump chamber 12 are defined within the housing
body 14, the heating chamber 11 is located above the pump chamber
12, and the heating chamber 11 and the pump chamber 12 are
communicated at a central axis of the housing body 14. The casing
body 211 is provided with the inlet pipe 13, the inlet 130 is
defined in the inlet pipe 13, and the lower end of the inlet pipe
13 extends into the heating chamber 11. An outer peripheral wall of
the housing body 14 is provided with the outlet 140 in
communication with the pump chamber 12, and the central axis of the
outlet 140 is tangent to the outer peripheral wall of the housing
body 14.
[0072] As illustrated in FIG. 4, the heating device 22 is pressed
to the upper end of the housing body 14 by the casing body 211, the
lower surface of the heating device 22 is formed as the top wall of
the heating chamber 11, and a seal ring 5 is provided between the
heating device 22 and the housing body 14 for sealing, and another
seal ring is provided between the housing body 14 and the casing
body 211 for sealing. The flow guide member 3 is disposed within
the heating chamber 11 and located below the heating device 22, and
the flow guide member 3 includes the separating plate 31, a
plurality of spiral vanes 32 and a plurality of reverse spiral
vanes 33. As illustrated in FIGS. 4 and 8, the separating plate 31
is recessed downwards and inwards along the radial direction, the
outer peripheral edge of the separating plate 31 is located above
the center of the separating plate 31, a plurality of positioning
holes 310 are provided and spaced along the circumferential
direction of the separating plate 31, a conical guide flow block
311 is provided at the center of the upper surface of the
separating plate 31, and the vertex of the flow guide block 311 is
rounded off.
[0073] As illustrated in FIGS. 4 and 7, the plurality of spiral
vanes 32 are provided on the upper side of the separating plate 31
and integrally formed with the separating plate 31. The spiral
vanes 32 are shifted clockwise from inside to outside along the
radial direction of the separating plate 31 and define the
spreading channel in the upper side of the separating plate 31. The
inner ends of the spiral vanes 32 are provided with the engaging
notches 320, and the lower end of the inlet pipe 13 is fitted in
the engaging notches 320 of the plurality of spiral vanes 32. Thus,
the inlet pipe 13 is fitted with the flow guide member 3.
[0074] As illustrated in FIGS. 1 and 4, the plurality of reverse
spiral vanes 33 are provided to the lower side of the separating
plate 31 and integrally formed with the housing body 14. The
reverse spiral vanes 33 are shifted counterclockwise from inside to
outside along the radial direction of the separating plate 31 and
define the converging channel in the lower side of the separating
plate 31. Only one of two adjacent reverse spiral vanes 33 is
provided with the positioning column 331, and a plurality of
positioning columns 331 are fitted in a plurality of positioning
holes 310 correspondingly. Thus, the separating plate 31 is
supported on the plurality of reverse spiral vanes 33, and hence
the flow guide member 3 is mounted on the housing body 14.
[0075] As illustrated in FIG. 4, the impeller 4 is disposed within
the pump chamber 12, the fluid converging in the pump chamber 12
flows to the outlet 140 under the guidance of the impeller 4, and
the housing body 14 surrounding the impeller 4 has a spiral shape.
The central axis of the inlet 130, the central axis of the housing
body 14, the central axis of the heating device 22, the central
axis of the flow guide member 3, and the central axis of the
impeller 4 coincide with each other.
[0076] For the centrifugal pump 100 according to the embodiment of
the present disclosure, by providing the heating device 22 within
the heating chamber 11 and providing the impeller 4 within the pump
chamber 12, the structure of the centrifugal pump 100 is compact
and the volume thereof is small, achieving an increased space
utilization rate thereof. Meanwhile, the pump housing 1 surrounding
the impeller 4 is designed in the spiral shape, thereby enhancing
the hydraulic performance of the centrifugal pump 100.
Additionally, the flow guide member 3 is used to reduce the fluid
loss due to curves, and the fluid can flow through the lower
surface of the heating device 22 and make sufficient contact with
the heating device 22, such that an outer diameter of the heating
device 22 can match an outer diameter of the pump housing 1 to
improve the heating efficiency of the fluid and reduce an axial
size of the centrifugal pump 100.
[0077] The centrifugal pump 100 according to another embodiment of
the present disclosure will be described with reference to FIGS.
2-6 and FIGS. 10-13, and it could be understood that the following
description is only explanatory and is not constructed to limit the
present disclosure.
[0078] As illustrated in FIGS. 2-6 and FIGS. 10-13, the centrifugal
pump 100 according the embodiment of the present disclosure
includes the pump housing 1, the heating device 22, the flow guide
member 3 and the impeller 4.
[0079] In one embodiment, the pump housing 1 includes the housing
body 14, the casing body 211 and the inlet pipe 13. The heating
chamber 11 and the pump chamber 12 are defined within the housing
body 14, the heating chamber 11 is located above the pump chamber
12, and the heating chamber 11 and the pump chamber 12 are
communicated at the central axis of the housing body 14. The casing
body 211 is provided with the inlet pipe 13, the inlet 130 is
defined in the inlet pipe 13, and the lower end of the inlet pipe
13 extends into the heating chamber 11. The outer peripheral wall
of the housing body 14 is provided with the outlet 140 in
communication with the pump chamber 12, and the central axis of the
outlet 140 is tangent to the outer peripheral wall of the housing
body 14.
[0080] As illustrated in FIG. 4, the heating device 22 is pressed
to the upper end of the housing body 14 by the casing body 211, the
lower surface of the heating device 22 is formed as the top wall of
the heating chamber 11, and the seal ring 5 is provided between the
heating device 22 and the housing body 14 for sealing, and also
provided between the housing body 14 and the casing body 211 for
sealing. The flow guide member 3 is integrally formed and disposed
within the heating chamber 11, and is located below the heating
device 22. The flow guide member 3 includes the separating plate
31, a plurality of spiral vanes 32 and a plurality of reverse
spiral vanes 33. As illustrated in FIGS. 4 and 12, the separating
plate 31 is recessed downwards and inwards along the radial
direction, the outer peripheral edge of the separating plate 31 is
located above the center of the separating plate 31, a plurality of
positioning holes 310 are provided and spaced along the
circumferential direction of the separating plate 31, a conical
guide flow block 311 is provided at the center of the upper surface
of the separating plate 31, and the vertex of the flow guide block
311 is rounded off.
[0081] As illustrated in FIGS. 4 and 11, the plurality of spiral
vanes 32 are disposed at the upper side of the separating plate 31.
The spiral vanes 32 is are shifted clockwise outwards from inside
to outside along the radial direction of the separating plate 31
and define the spreading channel on the upper side of the
separating plate 31, and the lower end of the inlet pipe 13 is
fitted in the engaging notches 320 of the plurality of spiral vanes
32. Thus, the inlet pipe 13 is fitted with the flow guide member
3.
[0082] As illustrated in FIGS. 10 and 12, the plurality of reverse
spiral vanes 33 are disposed at the lower side of the separating
plate 31. The reverse spiral vanes 33 are shifted counterclockwise
from inside to outside along the radial direction of the separating
plate 31 and define the converging channel in the lower side of the
separating plate 31, and the plurality of reverse spiral vanes 33
are supported on the housing body 14. Thus, the flow guide member 3
is supported on the housing body 14.
[0083] As illustrated in FIGS. 4-6, the impeller 4 is disposed
within the pump chamber 12, the fluid converging in the pump
chamber 12 flows to the outlet 140 under the guidance of the
impeller 4, and the housing body 14 surrounding the impeller 4 has
a spiral shape. The central axis of the inlet 130, the central axis
of the housing body 14, the central axis of the heating device 22,
the central axis of the flow guide member 3, and the central axis
of the impeller 4 coincide with each other, and the heating chamber
11 is communicated with the pump chamber 12 at the central axis of
the housing body 14.
[0084] For the centrifugal pump 100 according to the embodiment of
the present disclosure, by providing the heating device 22 within
the heating chamber 11 and providing the impeller 4 within the pump
chamber 12, the structure of the centrifugal pump 100 is compact
and the volume thereof is small, achieving an increased space
utilization rate thereof. Meanwhile, the pump housing 1 surrounding
the impeller 4 is designed in the spiral shape, thereby enhancing
the hydraulic performance of the centrifugal pump 100.
Additionally, with the spreading channel defined by the plurality
of spiral vanes 32 and the converging channel defined by the
plurality of reverse spiral vanes 33, the fluid flows along a
relatively large turning radius, reducing the fluid loss due to
curve, and the separating plate 31 is recessed downwards and
inwards along the radial direction, improving the heating
efficiency for the fluid.
[0085] A pump heater 200 for the centrifugal pump 100 according to
embodiments of the present disclosure will be described with
reference to FIGS. 1 to 18. The pump heater 200 has advantages of
high space utilization rate and high heating efficiency, and will
not interfere with pumping efficiency. The pump heater 200 can be
applied to a pumping and heating device, such as a centrifugal
pump.
[0086] As illustrated in FIGS. 1-18, the pump heater 200 according
to embodiments of the present disclosure includes a casing 21 and
the heating device 22.
[0087] The casing 21 is provided with the inlet 130, the heating
device 22 is disposed below the casing 21 and avoids the inlet 130,
for example, the heating device 22 surrounds the inlet 130. The
inlet 130 communicates an upper space 201 of the casing 21 with a
lower space 202 of the heating device 22, and the fluid enters the
casing 21 via the inlet 130 and flows to the lower space 202 of the
heating device 22 to be heated by the heating device 22.
[0088] For the pump heater 200 according to embodiments of the
present disclosure, by providing the heating device 22 below the
casing 21 and by employing the heating device 22 to heat the fluid
that flows to its lower space 202, the heated area of the fluid is
enlarged, and space can be utilized sufficiently. Meanwhile, since
the heating device 22 avoids the inlet 130, the heating device 22
will not produce hydraulic resistance to the fluid and avoids
affecting the pumping efficiency.
[0089] In conclusion, the pump heater 200 according to embodiments
of the present disclosure has high space utilization rate and high
heating efficiency, and will not affect the pumping efficiency.
[0090] According to some embodiments of the present disclosure, at
least one of the upper surface and an outer peripheral surface of
the heating device 22 is provided with a resistance coating, i.e.
at least one of surfaces of the heating device 22 not in contact
with the fluid to be heated is provided with the resistance
coating. For example, the upper surface of the heating device 22 is
coated with the resistance coating, and heat is transferred to the
lower surface of the heating device 22 and heats the fluid in the
lower space 202. Certainly, the upper surface and the outer
peripheral surface of the heating device 22 can be both coated with
the resistance coating. In one embodiment, the resistance coating
can be a thick-film resistor.
[0091] As illustrated in FIGS. 1, 4, 10, 14, 16 and 18, in some
embodiments, the heating device 22 can be an annular heating plate
with a central through hole, and the position of the central
through hole corresponds to that of the inlet 130 in a vertical
direction. For example, a central axis of the central through hole
and the central axis of the inlet 130 both extend along the
vertical direction and coincide with each other, and a diameter of
the central through hole is larger than or equal to a diameter of
the inlet 130, such that the heating device 22 will not produce
hydraulic resistance to the fluid at the inlet 130.
[0092] In one embodiment, as illustrated in FIGS. 1, 2, 4, 6, 10,
14, and 16-18, the heating device 22 can be a ring-shaped heating
plate, so as to further improve the space utilization rate and the
heating efficiency.
[0093] In some embodiments shown by FIGS. 14 and 18, an inner
peripheral edge and an outer peripheral edge of the heating device
22 can be sealed from the casing 21 respectively to avoid fluid
leakage. In one embodiment, the inner peripheral edge and the outer
peripheral edge of the heating device 22 can be sealed from the
casing 21 by means of the seal ring 5 respectively. For example,
the inner peripheral edge of the heating device 22 is sealed from
the casing 21 by means of a first seal ring 5, while the outer
peripheral edge of the heating device 22 is sealed from the casing
21 by means of a second seal ring 5.
[0094] In one embodiment, a thermal insulation member 6 can be
provided between the inner peripheral edge and/or the outer
peripheral edge of the heating device 22 and the corresponding seal
ring 5, such that the seal ring 5 is prevented from contacting the
heating device 22 directly, mitigating the impact of the heat
generated by the heating device 22 on the seal ring 5. The thermal
insulation member 6 can be provided between the inner peripheral
edge of the heating device 22 and the corresponding seal ring 5, or
the thermal insulation member 6 can be provided between the outer
peripheral edge of the heating device 22 and the corresponding seal
ring 5. Certainly, the thermal insulation members 6 can be provided
between the inner peripheral edge and the outer peripheral edge of
the heating device 22 and their corresponding seal rings 5 at the
same time. For example, a first thermal insulation member 61
extending along a circumferential direction of the inner peripheral
edge is welded to the inner peripheral edge of the heating device
22, and a second thermal insulation member 62 extending along a
circumferential direction of the outer peripheral edge is welded to
the outer peripheral edge of the heating device 22. The first
thermal insulation member 61 is located between the inner
peripheral edge of the heating device 22 and the first seal ring
51, and the first seal ring 51 seals a gap between the first
thermal insulation member 61 and the casing 21. The second thermal
insulation member 62 is located between the outer peripheral edge
of the heating device 22 and the second seal ring 52, and the
second seal ring 52 seals a gap between the second thermal
insulation member 62 and the casing 21.
[0095] As illustrated in FIGS. 1, 2, 6, 10, and 14-16, in some
embodiments of the present disclosure, the pump heater 200 can
further include a wiring terminal 7, and the wiring terminal 7 is
electrically coupled with the heating device 22 and exposed out of
the casing 21 to supply power to the heating device 22. Further, as
illustrated in FIGS. 1-3, 5, 6, 10, and 14-16, the heating device
22 can be provided with a terminal box 8, and the wiring terminal 7
is disposed in the terminal box 8 to protect the wiring terminal 7,
so as to improve electrical safety.
[0096] In some embodiments illustrated in FIGS. 1-6, 10, 14, 15, 17
and 18, the casing 21 can be constituted by the casing body 211 and
the inlet pipe 13 together, the heating device 22 is disposed below
the casing body 211, the inlet pipe 13 is disposed on the casing
body 211, and the inlet 130 is defined in the inlet pipe 13. Thus,
the fluid flows to the lower space 202 of the heating device 22
under the guidance of the inlet pipe 13, with confronting little
hydraulic resistance.
[0097] The pump heater 200 according to a first embodiment of the
present disclosure will be described in detail with reference to
FIGS. 14-16, and it could be understood that the following
description is only explanatory and is not constructed to limit the
present disclosure.
[0098] As illustrated in FIGS. 14-16, the pump heater 200 according
to the embodiment of the present disclosure includes the casing 21,
the heating device 22 and the wiring terminal 7.
[0099] In one embodiment, the casing 21 includes the casing body
211 and the inlet pipe 13. The heating device 22 is mounted to a
lower surface of the casing body 211 and is provided with the
terminal box 8. The terminal box 8 is exposed out of the casing
body 211, and the wiring terminal 7 is mounted in the terminal box
8 and electrically connected with the heating device 22. The inlet
pipe 13 is integrally formed on the casing body 211 and has the
inlet 130, and the inlet 130 communicates the upper space 201 of
the casing body 211 with the lower space 202 of the heating device
22. The heating device 22 is a ring-shaped heating plate having a
central through hole and applied with a thick-film resistor on its
outer surface, the position of the central through hole
corresponding corresponds to the position of the inlet 130 in the
vertical direction.
[0100] The first thermal insulation member 61 extending along the
circumferential direction of the inner peripheral edge is welded to
the inner peripheral edge of the heating device 22, and the second
thermal insulation member 62 extending along the circumferential
direction of the outer peripheral edge is welded to the outer
peripheral edge of the heating device 22. A section of the first
thermal insulation member 61 in a vertical plane is substantially
L- shaped, and the first thermal insulation member 61 is sealed
from the casing body 211 by means of the first seal ring 51. A
section of the second thermal insulation member 62 in the vertical
plane is substantially Z-shaped, and the second thermal insulation
member 62 is sealed from the casing body 211 by means of the second
seal ring 52.
[0101] For the pump heater 200 according to the embodiment of the
present disclosure, by mounting the heating device 22 below the
casing body 211 and making the heating device 22 avoid the inlet
130, and coating the outer surface of the heating device 22 with
the thick- film resistor, not only the space utilization rate and
the heating efficiency of the pump heater 200 are enhanced, but
also the pumping efficiency can be ensured.
[0102] The pump heater 200 according to a second embodiment of the
present disclosure will be described in detail with reference to
FIGS. 17 and 18, and it could be understood that the following
description is only explanatory and is not constructed to limit the
present disclosure.
[0103] As illustrated in FIGS. 17 and 18, the pump heater 200
according to the embodiment of the present disclosure includes the
casing 21 and the heating device 22.
[0104] In one embodiment, the casing 21 includes the casing body
211 and the inlet pipe 13. The heating device 22 is mounted to the
lower surface of the casing body 211. The inlet pipe 13 is
integrally formed on the casing body 211 and has the inlet 130, the
inlet 130 communicates the upper space 201 of the casing body 211
with the lower space 202 of the heating device 22, and the lower
end of the inlet pipe 13 extends into the lower space 202. The
heating device 22 is an annular heating plate having a central
through hole and coated with a thick-film resistor on its outer
surface, the position of the central through hole corresponds to
the position of the inlet 130 in the vertical direction. The inner
peripheral edge of the heating device 22 is sealed from the casing
body 211 and from the inlet pipe 13 by means of the first seal ring
51, while the outer peripheral edge of the heating device 22 is
sealed from the casing body 211 by means of the second seal ring
52.
[0105] The centrifugal pump 100 according to one embodiment of the
present disclosure will be described in detail with reference to
FIGS. 1-9, and the centrifugal pump 100 is suitable for various
applications, such as fluid transportation, cooling systems and
domestic appliances, and has advantages of the compact structure,
small volume, high heating efficiency and good pumping performance.
It could be understood that the following description is only
explanatory and is not constructed to limit the present
disclosure.
[0106] As illustrated in FIGS. 1-9, the centrifugal pump 100
according to the embodiment of the present disclosure includes the
housing body 14, the pump heater 200, the flow guide member 3 and
the impeller 4.
[0107] In one embodiment, the pump heater 200 includes the casing
21, the heating device 22 and the wiring terminal 7. The casing 21
includes the casing body 211 and the inlet pipe 13. The heating
device 22 is mounted to the lower surface of the casing body 211
and is provided with the terminal box 8. The terminal box 8 is
exposed out of the casing body 211, and the wiring terminal 7 is
mounted in the terminal box 8 and electrically connected with the
heating device 22. The inlet pipe 13 is mounted on the casing body
211 and has the inlet 130. The inlet 130 communicates the upper
space 201 of the casing body 211 with the lower space 202 of the
heating device 22. The heating device 22 is an annular heating
plate having a central through hole and coated with a thick-film
resistor on its outer surface, the position of the central through
hole corresponds to the position of the inlet 130 in the vertical
direction.
[0108] The housing body 14, the casing body 211 and the inlet pipe
13 constitute the pump housing 1 of the centrifugal pump 100. The
heating chamber 11 and the pump chamber 12 are defined in the
housing body 14, the heating chamber 11 is located above the pump
chamber 12, the heating chamber 11 and the pump chamber 12 are
communicated at the central axis of the housing body 14, and the
heating chamber 11 and the pump chamber 12 are located below the
heating device 22. The heating chamber 11 is in communication with
the inlet 130, the lower end of the inlet pipe 13 extends into the
heating chamber 11, the outer peripheral wall of the housing body
14 defines the outlet 140 in communication with the pump chamber
12, and the central axis of the outlet 140 is tangent to the outer
peripheral wall of the housing body 14.
[0109] As illustrated in FIG. 4, the heating device 22 is pressed
to the upper end of the housing body 14 by the casing body 211, and
the lower surface of the heating device 22 is formed as the top
wall of the heating chamber 11. The first seal ring 51 is used for
sealing the inner peripheral edge of the heating device 22 from an
outer peripheral surface of the inlet pipe 13 by means of the first
seal ring 51, while the second seal ring 52 is used to for sealing
the outer peripheral edge of the heating device 22 from the housing
body 14 and sealing the housing body 14 from the casing body 211.
The flow guide member 3 is disposed within the heating chamber 11
and located below the heating device 22, and the flow guide member
3 includes the separating plate 31, a plurality of spiral vanes 32
and a plurality of reverse spiral vanes 33. As illustrated in FIGS.
4 and 8, the separating plate 31 is recessed downwards and inwards
along the radial direction, the outer peripheral edge of the
separating plate 31 is located above the center of the separating
plate 31, a plurality of positioning holes 310 are provided and
spaced along the circumferential direction of the separating plate
31, a conical guide flow block 311 is provided at the center of the
upper surface of the separating plate 31, and the vertex of the
flow guide block 311 is rounded off.
[0110] As illustrated in FIGS. 4 and 7, the plurality of spiral
vanes 32 are provided on the upper side of the separating plate 31
and integrally formed with the separating plate 31. The spiral
vanes 32 are shifted clockwise outwards from inside to outside
along the radial direction of the separating plate 31 and defines
the spreading channel in the upper side of the separating plate 31.
The inner ends of the spiral vanes 32 are provided with the
engaging notches 320, and the lower end of the inlet pipe 13 is
fitted in the engaging notches 320 of the plurality of spiral vanes
32. Thus, the inlet pipe 13 is fitted with the flow guide member
3.
[0111] As illustrated in FIGS. 1 and 4, the plurality of reverse
spiral vanes 33 are provided to the lower side of the separating
plate 31 and integrally formed with the housing body 14. The
reverse spiral vanes 33 are shifted counterclockwise from inside to
outside along the radial direction of the separating plate 31 and
define the converging channel in the lower side of the separating
plate 31. Only one of two adjacent reverse spiral vanes 33 is
provided with the positioning column 331, and a plurality of
positioning columns 331 are fitted in a plurality of positioning
holes 310 correspondingly. Thus, the separating plate 31 is
supported on the plurality of reverse spiral vanes 33, and hence
the flow guide member 3 is mounted on the housing body 14.
[0112] As illustrated in FIG. 4, the impeller 4 is disposed within
the pump chamber 12, the fluid converging in the pump chamber 12
flows to the outlet 140 under the guidance of the impeller 4, and
the housing body 14 surrounding the impeller 4 has a spiral shape.
The central axis of the inlet 130, the central axis of the housing
body 14, the central axis of the central through hole of the
heating device 22, the central axis of the flow guide member 3, and
the central axis of the impeller 4 coincide with each other.
[0113] A heating and pumping process of the centrifugal pump 100
according to embodiments of the present disclosure will be
described with reference to the drawings.
[0114] The fluid flows along the spreading channel after entering
the heating chamber 11 via the inlet 130, and at this time, the
flow of the fluid spreads from inside to outside along the radial
direction of the heating device 22. Afterwards, the fluid spread by
the spreading channel flows into the converging channel, and at
this time, the flow of the fluid converges from outside to inside
along the radial direction of the heating device 22. In such a way,
resistance due to curves to the fluid flow and the resulting fluid
loss due to curves are reduced; and since the fluid spreads
outwards along the radial direction of the heating device 22, the
fluid can flow through the lower surface of the heating device 22
and get full contact with the heating device 22, enlarging a heated
area of the fluid, and finally, the heated fluid converges into the
pump chamber 12 and then flows to the outlet 140 under the guidance
of the impeller 4.
[0115] Since the centrifugal pump 100 according to embodiments of
the present disclosure employs the above pump heater 200, the
centrifugal pump 100 has the compact structure, small volume and
improved space utilization rate. Meanwhile, the heating device 22
is provided in a manner of avoiding the inlet 130, so the hydraulic
resistance to the fluid will not be increased, and the pump housing
1 surrounding the impeller 4 is designed in the spiral shape,
thereby enhancing the pumping performance of the centrifugal pump
100. Additionally, the flow guide member 3 is employed, not only
the fluid loss due to curves is reduced, but also the fluid can
flow through the lower surface of the heating device 22 and contact
with the heating device 22 sufficiently, such that the outer
diameter of the heating device 22 can match the outer diameter of
the pump housing 1 to improve the heating efficiency for the fluid
and reduce the axial size of the centrifugal pump 100.
[0116] The centrifugal pump 100 according to another embodiment of
the present disclosure will be described with reference to FIGS.
2-6 and FIGS. 10-13, and it could be understood that the following
description is only explanatory and is not constructed to limit the
present disclosure.
[0117] As illustrated in FIGS. 2-6 and FIGS. 10-13, the centrifugal
pump 100 according the embodiment of the present disclosure
includes the housing body 14, the pump heater 200, the flow guide
member 3 and the impeller 4.
[0118] In one embodiment, the pump heater 200 includes the casing
21, the heating device 22 and the wiring terminal 7. The casing 21
includes the casing body 211 and the inlet pipe 13. The heating
device 22 is mounted to the lower surface of the casing body 211
and is provided with the terminal box 8. The terminal box 8 is
exposed out of the casing body 211, and the wiring terminal 7 is
mounted in the terminal box 8 and electrically coupled with the
heating device 22. The inlet pipe 13 is mounted on the casing body
211 and has the inlet 130. The inlet 130 communicates the upper
space 201 of the casing body 211 with the lower space 202 of the
heating device 22. The heating device 22 is an annular heating
plate having a central through hole and coated with a thick-film
resistor on its outer surface, the position of the central through
hole corresponds to the position of the inlet 130 in the vertical
direction.
[0119] The housing body 14, the casing body 211 and the inlet pipe
13 constitute the pump housing 1 of the centrifugal pump 100. The
heating chamber 11 and the pump chamber 12 are defined in the
housing body 14, the heating chamber 11 is located above the pump
chamber 12, the heating chamber 11 and the pump chamber 12 are
communicated at the central axis of the housing body 14, and the
heating chamber 11 and the pump chamber 12 are located below the
heating device 22. The heating chamber 11 is in communication with
the inlet 130, the lower end of the inlet pipe 13 extends into the
heating chamber 11, the outer peripheral wall of the housing body
14 defines the outlet 140 in communication with the pump chamber
12, and the central axis of the outlet 140 is tangent to the outer
peripheral wall of the housing body 14.
[0120] As illustrated in FIG. 4, the heating device 22 is pressed
to the upper end of the housing body 14 by the casing body 211, and
the lower surface of the heating device 22 is formed as the top
wall of the heating chamber 11. The first seal ring 51 is used for
sealing the inner peripheral edge of the heating device 22 from an
outer peripheral face of the inlet pipe 13, while the second seal
ring 52 is used for sealing the outer peripheral edge of the
heating device 22 from the housing body 14 and sealing the housing
body 14 from the casing body 211. The flow guide member 3 is
integrally formed and disposed within the heating chamber 11, and
is located below the heating device 22. The flow guide member 3
includes the separating plate 31, a plurality of spiral vanes 32
and a plurality of reverse spiral vanes 33. As illustrated in FIGS.
4 and 12, the separating plate 31 is recessed downwards and inwards
along the radial direction, the outer peripheral edge of the
separating plate 31 is located above the center of the separating
plate 31, a plurality of positioning holes 310 are provided and
spaced along the circumferential direction of the separating plate
31, a conical guide flow block 311 is provided at the center of the
upper surface of the separating plate 31, and the vertex of the
flow guide block 311 is rounded off.
[0121] As illustrated in FIGS. 4 and 11, the plurality of spiral
vanes 32 are disposed at the upper side of the separating plate 31.
The spiral vanes 32 are shifted clockwise outwards along the radial
direction of the separating plate 31 and define the spreading
channel in the upper side of the separating plate 31. The lower end
of the inlet pipe 13 is fitted in the engaging notches 320 of the
plurality of spiral vanes 32. Thus, the inlet pipe 13 is fitted
with the flow guide member 3.
[0122] As illustrated in FIGS. 10 and 12, the plurality of reverse
spiral vanes 33 are disposed at the lower side of the separating
plate 31. The reverse spiral vanes 33 are shifted counterclockwise
outwards along the radial direction of the separating plate 31 and
define the converging channel in the lower side of the separating
plate 31. The plurality of reverse spiral vanes 33 are supported on
the housing body 14. Thus, the flow guide member 3 is supported on
the housing body 14.
[0123] As illustrated in FIGS. 4-6, the impeller 4 is disposed
within the pump chamber 12, the fluid converging in the pump
chamber 12 flows to the outlet 140 under the guidance of the
impeller 4, and the housing body 14 surrounding the impeller 4 has
a spiral shape. The central axis of the inlet 130, the central axis
of the housing body 14, the central axis of the central through
hole of the heating device 22, the central axis of the flow guide
member 3, and the central axis of the impeller 4 coincide with each
other.
[0124] Since the centrifugal pump 100 according to embodiments of
the present disclosure employs the above pump heater 200, the
centrifugal pump 100 has the compact structure, small volume and
improved space utilization rate. Meanwhile, the heating device 22
is provided in a manner of avoiding the inlet 130, so the hydraulic
resistance to the fluid will not be increased, and the pump housing
1 surrounding the impeller 4 is designed in the spiral shape,
thereby enhancing the pumping performance of the centrifugal pump
100. Additionally, with the spreading channel defined by the
plurality of spiral vanes 32 and the converging channel defined by
the plurality of reverse spiral vanes 33, the fluid flows along a
relatively large turning radius, reducing the fluid loss, and the
separating plate 31 is recessed downwards and inwards along the
radial direction, improving the heating efficiency of the
fluid.
[0125] In the specification, it is to be understood that terms such
as "central," "upper," "lower," "horizontal," "top," "bottom,"
"inner," "outer," "clockwise," "counterclockwise," "axial,"
"radial" and "circumferential" 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
of the present disclosure and do not indicate or imply that the
device or element referred to may have a particular orientation or
may be constructed or operated in a particular orientation. Thus,
these terms cannot be constructed to limit the present disclosure.
In the description of the present disclosure, the term "a plurality
of" means two or more than two, unless specified otherwise.
[0126] In the present disclosure, unless specified or limited
otherwise, the terms "mounted," "connected," "coupled" and the like
are used broadly, and may be, for example, fixed connections,
detachable connections, or integral connections; may also be
mechanical or electrical connections; may also be direct
connections or indirect connections via intervening structures; may
also be inner communications of two elements.
[0127] Reference throughout this specification to "a further
embodiment," "some embodiments," "one embodiment," 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 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.
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