U.S. patent application number 17/314197 was filed with the patent office on 2021-11-25 for fluid transportation actuator.
This patent application is currently assigned to Microjet Technology Co., Ltd.. The applicant listed for this patent is Microjet Technology Co., Ltd.. Invention is credited to Shih-Chang Chen, Yung-Lung Han, Chi-Feng Huang, Jyun-Yi Jhang, Yang Ku, Jia-Yu Liao, Yi-Ting Lu, Hao-Jan Mou, Chun-Lung Tseng.
Application Number | 20210363984 17/314197 |
Document ID | / |
Family ID | 1000005624086 |
Filed Date | 2021-11-25 |
United States Patent
Application |
20210363984 |
Kind Code |
A1 |
Mou; Hao-Jan ; et
al. |
November 25, 2021 |
FLUID TRANSPORTATION ACTUATOR
Abstract
A fluid transportation actuator is disclosed and includes a
silencing jet orifice plate, a chamber frame, an actuator, an
insulation frame and a conductive frame. The silencing jet orifice
plate includes a silencing plate, a suspension plate and a central
aperture. The suspension plate is permitted to undergo a bending
vibration. The central aperture is formed on a center of the
suspension plate. The silencing plate is disposed and fixed in the
central aperture disposed at the center of the suspension plate.
The chamber frame is stacked on the suspension plate. The actuator
is stacked on the chamber frame. The actuator generates the bending
vibration in a reciprocating manner as a voltage is applied
thereto. The actuator includes a piezoelectric-thin-plate pin. The
insulation frame is stacked on the actuator. The conductive frame
is stacked on the insulation frame and includes a conductive-frame
pin.
Inventors: |
Mou; Hao-Jan; (Hsinchu,
TW) ; Jhang; Jyun-Yi; (Hsinchu, TW) ; Tseng;
Chun-Lung; (Hsinchu, TW) ; Chen; Shih-Chang;
(Hsinchu, TW) ; Liao; Jia-Yu; (Hsinchu, TW)
; Huang; Chi-Feng; (Hsinchu, TW) ; Han;
Yung-Lung; (Hsinchu, TW) ; Ku; Yang; (Hsinchu,
TW) ; Lu; Yi-Ting; (Hsinchu, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Microjet Technology Co., Ltd. |
Hsinchu |
|
TW |
|
|
Assignee: |
Microjet Technology Co.,
Ltd.
Hsinchu
TW
|
Family ID: |
1000005624086 |
Appl. No.: |
17/314197 |
Filed: |
May 7, 2021 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F15D 1/025 20130101;
F04B 43/046 20130101 |
International
Class: |
F04B 43/04 20060101
F04B043/04; F15D 1/02 20060101 F15D001/02 |
Foreign Application Data
Date |
Code |
Application Number |
May 19, 2020 |
TW |
109116602 |
Claims
1. A fluid transportation actuator, comprising: a silencing jet
orifice plate, comprising; a silencing plate; a suspension plate
permitted to undergo a bending vibration; and a central aperture
formed on a center of the suspension plate, wherein the silencing
plate is disposed and fixed on the central aperture disposed at the
center of the suspension plate; a chamber frame carried and stacked
on the suspension plate; an actuator carried and stacked on the
chamber frame, wherein the actuator generates the bending vibration
in a reciprocating manner as a voltage is applied thereto; an
insulation frame carried and stacked on the actuator; and a
conductive frame carried and stacked on the insulation frame, and
comprising a conductive-frame pin, wherein a resonance chamber is
collaboratively defined by the actuator, the chamber frame and the
silencing jet orifice plate, wherein when the silencing jet plate
orifice is driven by the actuator in resonance, the suspension
plate of the silencing jet orifice plate is vibrated and displaced
in the reciprocating manner, so as to achieve fluid
transportation.
2. The fluid transportation actuator according to claim 1, wherein
the actuator comprises: a piezoelectric thin plate carried and
stacked on the chamber frame; a piezoelectric thick plate carried
and stacked on the piezoelectric thin plate; and a piezoelectric
element is carried and stacked on the piezoelectric thick plate,
wherein the piezoelectric element drives the piezoelectric thin
plate and the piezoelectric thick plate as the voltage applied, and
generates the bending vibration in the reciprocating manner.
3. The fluid transportation actuator according to claim 2, wherein
the piezoelectric thin plate and the piezoelectric thick plate are
made of two metals having different thermal expansion coefficients,
two different flexibilities and two different rigidities, and both
are not stainless steel.
4. The fluid transportation actuator according to claim 3, wherein
the piezoelectric thin plate has at least one first side length and
at least one second side length, and the length of the at least one
first side length and the length of the at least one second side
length are the same; wherein the piezoelectric thick plate has at
least one third side length and at least one fourth side length,
and the length of the at least one third side length and the length
of the at least one fourth side length are the same; wherein the
piezoelectric element has at least one fifth side length and at
least one sixth side length, and the length of the at least one
fifth side length and the length of the at least one sixth side
length are the same.
5. The fluid transportation actuator according to claim 4, wherein
the length of the at least one first side length is greater than
the length of the at least one third side length, the length of the
at least one first side length is greater than the length of the at
least one fifth side length, and the length of the at least one
third side length is greater than or equal to the length of the at
least one fifth side.
6. The fluid transportation actuator according to claim 5, wherein
a ratio of the length of the at least one fifth side length to the
length of the at least one third side length is in a range of 1:1
to 1:1.5.
7. The fluid transportation actuator according to claim 5, wherein
the length of the at least one first side length and the length of
the at least one second side length range from 5.0 mm to 16.0
mm.
8. The fluid transportation actuator according to claim 5, wherein
the length of the at least one third side length and the length of
the at least one fourth side length range from 3.5 mm to 9.5
mm.
9. The fluid transportation actuator according to claim 5, wherein
the length of the at least one fifth side length and the length of
the at least one sixth side length range from 2.95 mm to 9.0
mm.
10. The fluid transportation actuator according to claim 3, wherein
the piezoelectric thin plate comprises at least one
piezoelectric-thin-plate corner, the at least one
piezoelectric-thin-plate corner is a rounded corner, and the
rounded corner has a radius less than 2.0 mm, wherein the
piezoelectric thin plate comprises at least another
piezoelectric-thin-plate corner, which is a non-rounded corner.
11. The fluid transportation actuator according to claim 3, wherein
the piezoelectric thick plate comprises at least one
piezoelectric-thick-plate corner, the at least one
piezoelectric-thick-plate corner is a rounded corner, and the
rounded corner has a radius less than 2.0 mm.
12. The fluid transportation actuator according to claim 11,
wherein the piezoelectric thick plate has a
piezoelectric-thick-plate thickness, and the
piezoelectric-thick-plate thickness ranges from 0.05 mm to 0.5
mm.
13. The fluid transportation actuator according to claim 3, wherein
the piezoelectric element comprises four piezoelectric-element
corners, and the four piezoelectric-element corners are square
corners.
14. The fluid transportation actuator according to claim 13,
wherein the piezoelectric thin plate has a piezoelectric-thin-plate
thickness, and the piezoelectric-thin-plate thickness ranges from
0.05 mm to 0.2 mm.
Description
FIELD OF THE INVENTION
[0001] The present disclosure relates to a fluid transportation
actuator, and more particularly to a fluid transportation actuator
assembled and combined with different metal materials.
BACKGROUND OF THE INVENTION
[0002] In the prior art, fluid transportation actuators are mainly
constructed by stacking conventional mechanical components, and
each mechanical component is miniaturized or thinned to achieve the
goal of miniaturization and thinning of the overall device.
However, while the conventional mechanical components are
miniaturized, it is not easy to control the dimensional accuracy,
and the assembly accuracy is also difficult to control. It results
in different product yields and even unstable fluid flow rates. In
addition, while the mechanical components are miniaturized, the
single-material fluid transportation actuator has the problem of
insufficient structural toughness during being driven and easy to
result in the problems of interference and unrecognizable of the
driving point.
[0003] Furthermore, in the conventional fluid transportation
actuator, the output fluid cannot be converged effectively or the
element size is too small results in insufficient fluid propulsion
force. It leads to the problem of insufficient amount of fluid
transportation.
SUMMARY OF THE INVENTION
[0004] An object of the present disclosure is to provide a fluid
transportation actuator. In accordance with an aspect of the
present disclosure, the fluid transportation actuator includes a
silencing jet orifice plate, a chamber frame, an actuator, an
insulation frame and a conductive frame. The silencing jet orifice
plate includes a silencing plate, a suspension plate and a central
aperture. The suspension plate is permitted to undergo a bending
vibration. The central aperture is formed on a center of the
suspension plate. The silencing plate is disposed and fixed on the
central aperture disposed at the center of the suspension plate.
The chamber frame is carried and stacked on the suspension plate.
The actuator is carried and stacked on the chamber frame. The
actuator generates the bending vibration in a reciprocating manner
as a voltage is applied thereto, and includes a
piezoelectric-thin-plate pin. The insulation frame is carried and
stacked on the actuator. The conductive frame is carried and
stacked on the insulation frame, and includes a conductive-frame
pin. A resonance chamber is collaboratively defined by the
actuator, the chamber frame and the silencing jet orifice plate.
When the silencing jet orifice plate is driven by the actuator in
resonance, the suspension plate of the silencing jet orifice plate
is vibrated and displaced in the reciprocating manner, so as to
achieve fluid transportation.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The above contents of the present disclosure will become
more readily apparent to those ordinarily skilled in the art after
reviewing the following detailed description and accompanying
drawings, in which:
[0006] FIG. 1 is a perspective exploded view illustrating a fluid
transportation actuator according to an embodiment of the present
disclosure and taken from a first perspective;
[0007] FIG. 2 is a perspective exploded view illustrating the fluid
transportation actuator according to the embodiment of the present
disclosure and taken from a second perspective;
[0008] FIG. 3 is a top view illustrating the fluid transportation
actuator according to the embodiment of the present disclosure;
[0009] FIG. 4 is a bottom view illustrating the fluid
transportation actuator according to the embodiment of the present
disclosure;
[0010] FIG. 5 is a schematic diagram showing the dimensions of the
fluid transportation actuator shown in FIG. 3;
[0011] FIG. 6 is a schematic diagram showing the four corners of
the fluid transportation actuator shown in FIG. 3;
[0012] FIG. 7 is a cross-sectional view illustrating the fluid
transportation actuator along the dash line AA; and
[0013] FIG. 8 is a schematic exploded view showing the respective
dimensions of the fluid transportation actuator shown in FIG.
6.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0014] The present disclosure will now be described more
specifically with reference to the following embodiments. It is to
be noted that the following descriptions of preferred embodiments
of this disclosure are presented herein for purpose of illustration
and description only. It is not intended to be exhaustive or to be
limited to the precise form disclosed.
[0015] In all the accompanying drawings of the present disclosure,
if corner's orientations (M, N, O, P) or edge's orientations (W, X,
Y, Z) are marked on at the lower left, it is to define the
orientations of the fluid transportation actuator, so as to define
the described corner or the described edge accurately.
[0016] A fluid transportation actuator is provided in the present
disclosure. Please refer to FIGS. 1 and 2. In the embodiment, the
fluid transportation actuator 21 includes a silencing jet orifice
plate 211, a chamber frame 212, an actuator 213, an insulation
frame 214 and a conductive frame 215. The silencing jet orifice
plate 211 includes a silencing plate 211a, a suspension plate 211b
and a central aperture 211c. The suspension plate 211b is permitted
to undergo a bending vibration. The central aperture 211c is formed
on a center of the suspension plate 211b. The silencing plate 211a
is disposed and fixed on the central aperture 211c formed at the
center of the suspension plate 211b. The chamber frame 212 is
carried and stacked on the suspension plate 211b. The actuator 213
is carried and stacked on the chamber frame 212. The actuator 213
generates the bending vibration in a reciprocating manner as a
voltage is applied thereto, and includes a piezoelectric-thin-plate
pin 213e. The insulation frame 214 is carried and stacked on the
actuator 213. The conductive frame 215 is carried and stacked on
the insulation frame 214, and includes a conductive-frame pin 215e.
A resonance chamber is collaboratively defined by the actuator 213,
the chamber frame 212 and the silencing jet orifice plate 211. When
the silencing jet orifice plate 211 is driven by the actuator 213
in resonance, the suspension plate 211b of the silencing jet
orifice plate 211 is vibrated and displaced in the reciprocating
manner, so as to achieve fluid transportation. In the embodiment,
the actuator 213 includes a piezoelectric thin plate 213a, a
piezoelectric thick plate 213b and a piezoelectric element 213c.
The piezoelectric thin plate 213a is carried and stacked on the
chamber frame 212. Preferably but not exclusively, the
piezoelectric-thin-plate pin 213e is a protrusion of the
piezoelectric thin plate 213a. The piezoelectric thick plate 213b
is carried and stacked on the piezoelectric thin plate 213a. The
piezoelectric element 213c is carried and stacked on the
piezoelectric thick plate 213b. When the voltage is applied to the
piezoelectric element 213c, the piezoelectric thin plate 213a and
the piezoelectric thick plate 213b are driven to generate the
bending vibration in the reciprocating manner.
[0017] In the embodiment, the fluid transportation actuator 21
includes the silencing jet orifice plate 211, the chamber frame
212, the actuator 213, the insulation frame 214 and the conductive
frame 215, which are sequentially stacked. The silencing jet
orifice plate 211 includes a silencing plate 211a, a suspension
plate 211b and a central aperture 211c. The suspension plate 211b
has four piezoelectric-thin-plate corners (R1M, R1N, R1O and R1P).
When the suspension plate 211b is driven by electricity, it is
permitted to undergo a bending vibration. The central aperture 211c
is formed on a center of the suspension plate 211b. The silencing
plate 211a is disposed adjacent to and above the central aperture
211c disposed at the center of the suspension plate 211b. The
chamber frame 212 has four chamber-frame corners (R2M, R2N, R2O and
R2P). The chamber frame 212 is carried and stacked on the
suspension plate 211b. The actuator 213 is carried and stacked on
the chamber frame 212. In the embodiment, the actuator 213 includes
a piezoelectric thin plate 213a, a piezoelectric thick plate 213b
and a piezoelectric element 213c. When a voltage is applied to the
actuator 213, the actuator 213 generates the bending vibration in a
reciprocating manner. The actuator 213 further includes a
piezoelectric-thin-plate pin 213e. Preferably but not exclusively,
the piezoelectric-thin-plate pin 213e is a protrusion of the
piezoelectric thin plate 213a for receiving the applied voltage.
The piezoelectric thin plate 213a is carried and stacked on the
chamber frame 212. The piezoelectric thick plate 213b is carried
and stacked on the piezoelectric thin plate 213a. The piezoelectric
element 213c is carried and stacked on the piezoelectric thick
plate 213b. When the voltage is applied to the piezoelectric
element 213c, the piezoelectric thin plate 213a and the
piezoelectric thick plate 213b are driven to generate bending
vibration in the reciprocating manner. In the embodiment, the
insulation frame 214 has four insulation-frame corners (R4M, R4N,
R4O and R4P). The insulation frame 214 is carried and stacked on
the actuator 213. Preferably but not exclusively, the insulation
frame 214 is carried and stacked on the piezoelectric thin plate
213a of the actuator 213. The conductive frame 215 is carried and
stacked on the insulation frame 214, and includes a
conductive-frame pin 215e. Preferably but not exclusively, the
conductive-frame pin 215e is a protrusion of the conductive frame
215 for receiving the applied voltage. In the embodiment, a
resonance chamber is collaboratively defined by the actuator 213,
the chamber frame 212 and the silencing jet orifice plate 211. When
the silencing jet orifice plate 211 is driven by the actuator 213
in resonance, the suspension plate 211b of the silencing jet
orifice plate 211 is vibrated and displaced in the reciprocating
manner, so as to achieve fluid transportation.
[0018] In the fluid transportation actuator 21 of the present
disclosure, the piezoelectric thin plate 213a and the piezoelectric
thick plate 213b are made of two metals having different thermal
expansion coefficients, two different flexibilities and two
different rigidities, and both are not stainless steel.
[0019] Notably, the piezoelectric thin plate 213a and the
piezoelectric thick plate 213b are made of two metals having
different thermal expansion coefficients. The actuator 213 made of
metal materials having different thermal expansion coefficients can
avoid to generate two adjacent resonance frequencies, so as to
prevent the driving frequency offset result from the adjacent
resonance frequencies. At the same time, the impedance (resistance
and reactance) of the actuator 213 is reduced, so as to achieve
effective electric driving and improve the working efficiency of
the actuator 213. Moreover, comparing to the actuators made of a
single material (such as stainless steel) in the prior art, when
the micro-blower actuator of a single material is driven, the
structural strength and toughness thereof is insufficient, and it
is susceptible to interference. In the embodiment, the material of
the piezoelectric thin plate 213a or the piezoelectric thick plate
213b is phosphor bronze. In another embodiment, the materials of
the piezoelectric thin plate 213a and the piezoelectric thick plate
213b are both phosphor bronzes, but each phosphor bronze has
different chemical composition, respectively. It is understandable
that the two phosphor bronzes with different chemical compositions
have different thermal expansion coefficients, different
flexibilities and different rigidities.
[0020] Please refer to FIGS. 3 and 4, which are the views
illustrating the assembly shown in FIGS. 1 and 2. Moreover, please
refer to FIG. 5, which is a schematic diagram showing the
dimensions of the fluid transportation actuator shown in FIG. 3. In
the fluid transportation actuator 21 of the present disclosure, the
piezoelectric thin plate 213a has at least one first side length
L3aWY and at least one second side length L3aXZ. Preferably but not
exclusively, the length of the at least one first side length L3aWY
and the length of the at least one second side length L3aXZ are the
same. The piezoelectric thick plate 213b has at least one third
side length L3bWY and at least one fourth side length L3bXZ.
Preferably but not exclusively, the length of the at least one
third side length L3bWY and the length of the at least one fourth
side length L3bXZ are the same. The piezoelectric element 213c has
at least one fifth side length L3cWY and at least one sixth side
length L3cXZ. Preferably but not exclusively, the length of the at
least one fifth side length L3cWY and the length of the at least
one sixth side length L3cXZ are the same.
[0021] In the embodiment, the piezoelectric thin plate 213a has
four side lengths, which are two first side lengths L3aWY and two
second side lengths L3aXZ, respectively. Notably, the piezoelectric
thin plate 213a may be square, but not limited thereto. In other
embodiments, the piezoelectric thin plate 213a may be ring-shaped,
circular, rectangular or polygonal. In the embodiment, the
piezoelectric thick plate 213b has four side lengths, which are two
third side lengths L3bWY and two fourth side lengths L3bXZ,
respectively. Notably, the piezoelectric thick plate 213b may be
square, but the present disclosure is not limited thereto. In other
embodiments, the piezoelectric thick plate 213b may be ring-shaped,
circular, rectangular or polygonal. In the embodiment, the
piezoelectric element 213c has four side lengths, which are two
fifth side lengths L3cWY and two sixth side lengths L3cXZ,
respectively. Notably, the piezoelectric element 213c may be
square, but not limited thereto. In other embodiments, the
piezoelectric element 213c may be ring-shaped, circular,
rectangular or polygonal. In the embodiment, the conductive frame
215 excluding the protrusion (Namely, the conductive-frame pin 215e
is excluded) has four side lengths, which are two ninth side
lengths LSWYB and two eighth side lengths LSXZ, respectively.
Notably, the conductive frame 215 has the longest side length,
which includes the protrusion and is a seventh side length
L5WYA.
[0022] Please refer to FIG. 6, which shows the four corners of the
fluid transportation actuator shown in FIG. 3. In the fluid
transportation actuator 21 of the present disclosure, the
piezoelectric thin plate 213a includes at least one
piezoelectric-thin-plate corner (R3aN, R3aO or R3aP). Preferably
but not exclusively, the at least one piezoelectric-thin-plate
conner (R3aN, R3aO or R3aP) is a rounded corner, and the rounded
corner has a radius less then 2.0 mm. In the embodiment, the
piezoelectric thin plate 213a includes at least another
piezoelectric-thin-plate corner (R3aM), which is a non-rounded
corner. In the fluid transportation actuator 21 of the present
disclosure, the piezoelectric thick plate 213b includes at least
one piezoelectric-thick-plate corner (R3bM, R3bN, R3bO or R3bP),
the at least one piezoelectric-thick-plate corner (R3bM, R3bN, R3bO
or R3bP) is a rounded corner, and the rounded corner has a radius
less than 2.0 mm. In the fluid transportation actuator 21 of the
present disclosure, the piezoelectric element 213c includes four
piezoelectric-element corners (R3cM, R3cN, R3cO and R3cP), and the
four piezoelectric-element corners (R3cM, R3cN, R3cO and R3cP) are
square corners.
[0023] In the embodiment, the piezoelectric element 213c has four
corners, which are the piezoelectric-element corner R3cM, the
piezoelectric-element corner R3cN, the piezoelectric-element corner
R3cO and the piezoelectric-element corner R3 cP, respectively. All
four corners of the piezoelectric element 213c are square corners.
Notably, the four corners of the piezoelectric element 213c are
adjustable according to the practical requirements. For example,
part or all of the corners of the piezoelectric element 213c can be
changed into square corners, bevel corners (single-edge corners) or
polygonal corners. In the embodiment, the piezoelectric thick plate
213b has four corners, which are the piezoelectric-thick-plate
corner R3bM, the piezoelectric-thick-plate corner R3bN, the
piezoelectric-thick-plate corner R3bO and the
piezoelectric-thick-plate corner R3bP, respectively. All four
corners of the piezoelectric thick plate 213b are rounded corners,
and the rounded corner has a radius less than 2.0 min. Notably, the
four corners of the piezoelectric thick plate 213b are adjustable
according to the practical requirements. For example, part or all
of the corners of the piezoelectric thick plate 213b can be changed
into square corners, bevel corners (single-edge corners) or
polygonal corners. In the embodiment, the piezoelectric thin plate
213a has four corners, which are the piezoelectric-thin-plate
corner R3aM, the piezoelectric-thin-plate corner R3aN, the
piezoelectric-thin-plate corner R3aO and the
piezoelectric-thin-plate corner R3aP. Notably, the
piezoelectric-thin-plate corner R3aM of the piezoelectric thin
plate 213a is a bevel corner. The piezoelectric-thin-plate conner
R3aN, the piezoelectric-thin-plate conner R3aO and the
piezoelectric-thin-plate corner R3aP of the piezoelectric thin
plate 213a are rounded corners, and the rounded corner has a radius
less then 2.0 mm. The four corners of the piezoelectric thin plate
213a are adjustable according to the practical requirements. For
example, part or all of the corners of the piezoelectric thin plate
213a can be changed into rounded corners, bevel corners
(single-edge corners) or polygonal corners. In the embodiment, the
conductive frame 215 has four corners, which are the
conductive-frame corner RSM, the conductive-frame corner RSN, the
conductive-frame corner R50 and the conductive-frame corner RSP,
respectively. Notably, the conductive-frame corner R5M of the
conductive frame 215 is a bevel corner. The conductive-frame corner
RSN, the conductive-frame corner R50 and the conductive-frame
corner R5P of the conductive frame 215 are rounded corners, and the
rounded corner has a radius less then 2.0 mm. The four corners of
the conductive frame 215 are adjustable according to the practical
requirements. For example, part or all of the corners of the
conductive frame 215 can be changed into rounded corners, bevel
corners (single-edge corners) or polygonal corners.
[0024] Please refer to FIG. 7, which is a cross-sectional view
taken along the dash line AA in FIG. 6. Please refer to FIG. 8,
which shows the respective dimensions of the piezoelectric thin
plate 213a, the piezoelectric thick plate 213b and the
piezoelectric element 213c in FIG. 6. In the fluid transportation
actuator 21 of the present disclosure, the length of the first side
length L3aWY is greater than the length of the third side length
L3bWY. The length of the first side length L3aWY is greater than
the length of the fifth side length L3cWY. The length of the third
side length L3bWY is greater than or equal to the length of the
fifth side L3cWY. In the fluid transportation actuator 21 of the
present disclosure, the length of the first side length L3aWY and
the length of the second side length L3aXZ range from 5.0 mm to
16.0 mm. In the fluid transportation actuator 21 of the present
disclosure, the length of the third side length L3bWY and the
length of the fourth side length L3bXZ range from 3.5 mm to 9.5 mm.
In the fluid transportation actuator 21 of the present disclosure,
the length of the fifth side length L3cWY and the length of the
sixth side length L3cXZ range from 2.95 mm to 9.0 mm.
[0025] In the embodiment, the length of the first side length L3aWY
of the piezoelectric thin plate 213a is greater than the length of
the third side length L3bWY of the piezoelectric thick 213b. The
length of the first side length L3aWY of the piezoelectric thin
plate 213a is greater than or equal to the length of the fifth side
length L3cWY of the piezoelectric element 213c. Notably, preferably
but not exclusively, in the embodiment, the length of the first
side length L3aWY and the length of the second side length L3aXZ of
the piezoelectric thin plate 213a are the same, the length of the
third side length L3bWY and the length of the fourth side length
L3bXZ of the piezoelectric thick plate 213b are the same, the
length of the fifth side length L3cWY and the length of the sixth
side length L3cXZ of the piezoelectric element 213c are the same,
and the length of the ninth side length LSWYB and the length of the
eighth side length LSXZ of the conductive frame 215 are the same,
but not limited thereto. In other embodiments, the length of the
first side length L3aWY and the length of the second side length
L3aXZ of the piezoelectric thin plate 213a are different, the
length of the third side length L3bWY and the length of the fourth
side length L3bXZ of the piezoelectric thick plate 213b are
different, the length of the fifth side length L3cWY and the length
of the sixth side length L3cXZ of the piezoelectric element 213c
are different, and the length of the ninth side length L5WYB and
the length of the eighth side length L5XZ of the conductive frame
215 are different. Preferably but not exclusively, the length of
the third side length L3bWY and the length of the fourth side
length L3bXZ of the piezoelectric thick plate 213b are 8.40 mm.
Preferably but not exclusively, the length of the first side length
L3aWY and the length of the second side length L3aXZ of the
piezoelectric thin plate 213a are 12.80 mm. Preferably but not
exclusively, the length of the seventh side length L5WYA is 15.20
mm, but not limited thereto. In other embodiments, the lengths of
the first side length L3aWY, the second side length L3aXZ, the
third side length L3bWY, the fourth side length L3bXZ, the fifth
side length L3cWY, the sixth side length L3cXZ, the seventh side
length L5WYA, the eighth side length L5XZ and the ninth side length
L5WYB are adjustable according to the practical requirements.
[0026] In the fluid transportation actuator 21 of the present
disclosure, a ratio of the length of the fifth side length L3cWY to
the length of the third side length L3bWY is in a range of 1:1 to
1:1.5. Namely, the length of the fifth side length L3cWY of the
piezoelectric element 213c is less than or equal to the length of
the third side length L3bWY of the piezoelectric thick plate
213b.
[0027] In the fluid transportation actuator 21 of the present
disclosure, the piezoelectric thick plate 213b has a
piezoelectric-thick-plate thickness T3b, and the
piezoelectric-thick-plate thickness T3b ranges from 0.05 mm to 0.5
mm. In the fluid transportation actuator 21 of the present
disclosure, the piezoelectric thin plate 213a has a
piezoelectric-thin-plate thickness T3a, and the
piezoelectric-thin-plate thickness T3a ranges from 0.05 mm to 0.2
mm. The thickness of the actuator 213 is a combination of the
piezoelectric-thin-plate thickness T3a of the piezoelectric thin
plate 213a, the piezoelectric-thick-plate thickness T3b of the
piezoelectric thick plate 213b and the piezoelectric-element
thickness T3c of the piezoelectric element 213c. Preferably but not
exclusively, the piezoelectric-thick-plate thickness T3b ranges
from 0.05 to 0.5 mm, the piezoelectric-thin-plate thickness T3a
ranges from 0.05 to 0.2, and the piezoelectric-thick-plate
thickness T3b is thicker than the piezoelectric-thin-plate
thickness T3a.
[0028] In summary, the present disclosure provides a fluid
transportation actuator. Through the design of the piezoelectric
thin plate and piezoelectric thick plate of the actuator made of
metals with different thermal expansion coefficients, different
flexibilities and different rigidities, the driving impedance of
the conventional single-material fluid transportation actuator is
improved. It prevents the driving frequency from offset result from
the adjacent resonance frequencies. The structural strength and
toughness is enhanced by utilizing the material of phosphor bronze.
Moreover, with the design of the rounded corners in the
piezoelectric thick plate, the physical damage to the piezoelectric
thin plate is also reduced.
[0029] While the disclosure has been described in terms of what is
presently considered to be the most practical and preferred
embodiments, it is to be understood that the disclosure needs not
be limited to the disclosed embodiments. On the contrary, it is
intended to cover various modifications and similar arrangements
included within the spirit and scope of the appended claims which
are to be accorded with the broadest interpretation so as to
encompass all such modifications and similar structures.
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