Gas transfer device

Abstract

A gas transmission device, comprising: a housing, comprising a shell and a top cover, the shell being provided with an air inlet end, an air outlet end and a receiving groove; a valve body, comprising an air outlet plate, a valve piece and a first plate piece, the air outlet plate having a plurality of air outlet holes, the first plate piece having a plurality of first through holes, the valve piece having a plurality of valve holes, the valve holes being arranged in a staggered manner with the first through holes and being arranged in a corresponding manner with the air outlet holes; an actuating body, comprising a second plate piece, a frame and an actuating assembly, being arranged in a stacked manner on the valve body; the frame being arranged in a stacked manner on the second plate piece, and the actuating assembly being in a rectangular shape and being arranged in a stacked manner on the frame; thereby, when the actuating body is driven, the first through holes and the valve holes are arranged in a staggered manner, when the airflow is forward, the valve body operates to open the flow path, and when the airflow is reverse, the valve body operates to close the flow path.

Description

TECHNICAL FIELD

[0001] The present application relates to a gas transmission device, in particular, a large flow gas transmission device.

BACKGROUND

[0002] Currently, in various fields, whether it is medicine, computer technology, printing, energy and other industries, products are developing towards miniaturization and micro-miniaturization. The pump used to transport fluid is a key component of products such as micropumps, nebulizers, inkjet heads, and industrial printing devices. Therefore, how to break through the technical bottleneck by innovative structure is an important content for development.

[0003] With the rapid development of technology, the application of fluid transmission devices is becoming more and more diversified. For example, industrial applications, biomedical applications, healthcare, electronic heat dissipation, and even the recent popular wearable devices can all be seen. It can be seen that traditional pumps have gradually shown a trend towards miniaturization and maximization of flow.

[0004] However, the main structure design of the current gas transmission device towards the trend of maximization of flow is to prevent backflow and produce one-way flow. Therefore, how to produce a large flow gas transmission device is the main problem of the present application.

SUMMARY

[0005] The main purpose of the present application is to provide a gas transmission device, in which the outflow plate, valve plate, first plate, second plate and square actuating assembly are sequentially stacked and applied. The valve body is composed of the valve plate, the first plate and the second plate structure. When the gas flow is positive, the valve body acts in the way of opening the flow path. When the gas flow is reversed, the valve body acts in the way of closing the flow path. In this way, backflow is prevented, one-way gas flow is produced, and a large flow gas transmission device is formed.

[0006] A broad embodiment of this case is a gas transmission device, comprising: a housing, including a shell and a top cover, the shell having an inlet end, an outlet end and a receiving groove, the receiving groove communicating with the inlet end and the outlet end, and the top cover covering the receiving groove; a valve body, including an outlet plate, a valve plate and a first plate sequentially stacked in the receiving groove, the valve plate being located between the outlet plate and the first plate, wherein the outlet plate has multiple outlet holes, the first plate has multiple first through holes, the valve plate has multiple valve holes, and the valve holes are offset from the first through holes, the valve holes corresponding to the outlet holes. The actuator comprises a second plate, a frame, and an actuating component, wherein the second plate is stacked on the valve body and the thickness of the second plate is greater than the thickness of the first plate, and the second plate has a plurality of second through holes corresponding to the first through holes; the frame is stacked on the second plate, and the actuating component is rectangular in shape and stacked on the frame; thereby, when the actuator is driven, it is misaligned between the first through hole and the valve hole, so that when the airflow is in the forward direction, the valve body opens the flow path, and when the airflow is in the reverse direction, the valve body closes the flow path. [Attached Image Description]

[0007] Figure 1A This is a schematic diagram of the appearance of the gas transmission device in this case.

[0008] Figure 1B This is an exploded view of the gas transmission device in this case.

[0009] Figure 2A This is a plan view of the gas transmission device in this case, taken from a top-down perspective.

[0010] Figure 2B In accordance with Figure 2A A schematic diagram of the cross section as seen from the AA section line.

[0011] Figure 2C In accordance with Figure 2A A schematic diagram of the cross-section as seen from the BB section line.

[0012] Figure 2D In accordance with Figure 2C A schematic diagram of a partial cross-section as seen in reference numeral C.

[0013] Figures 3A to 3C and Figures 4A to 4B This is a schematic diagram of the operation of the gas transmission device in this case.

[0014] Figure 5 This is a schematic diagram of another embodiment of the gas transmission device in this case.

[0015] [Symbol Explanation]

[0016] 100: Gas transmission device

[0017] 1: Outer shell

[0018] 11: Shell

[0019] 111: Intake end

[0020] 112: Air outlet end

[0021] 113: Receiving slot

[0022] 114: Positioning Protrusion

[0023] 12: Top Cover

[0024] 2: Valve body

[0025] 20: Positioning hole

[0026] 21: Vent panel

[0027] 211: Vent

[0028] 212: concave part

[0029] 23: First Slab

[0030] 231: First through hole

[0031] 22: Valve plate

[0032] 221: Valve port

[0033] 3: Actuator

[0034] 31: Second plate

[0035] 311: Second through hole

[0036] 32: Framework

[0037] 321: Pin

[0038] 322: Intake chamber

[0039] 33: Actuation component

[0040] 331: Air intake plate

[0041] 3311: Air intake

[0042] 3312: Actuation Zone

[0043] 3313: Fixed Area

[0044] 332: Piezoelectric element

[0045] 333: Insulating frame

[0046] 334: Conductive framework

[0047] 3341: electrode

[0048] 3342: pin

[0049] 335: buffer sheet

[0050] A-A: section line

[0051] B-B: section line

[0052] C: reference numeral

[0053] d2: hole diameter of air outlet hole

[0054] d4: hole diameter of valve hole

[0055] G: interval

DETAILED DESCRIPTION

[0056] Some typical embodiments embodying features and advantages of the present application will be described in detail in the following description. It should be understood that the application can be varied in many ways and that the description and drawings are to be considered in a descriptive sense and not as a limitation on the scope of the application.

[0057] The present application provides a gas transmission device 100, please refer to Figure 1A 、 Figure 1B and Figure 2A , the gas transmission device 100 includes a shell 1, a valve body 2 and a driving body 3.

[0058] The shell 1 described above includes a shell body 11 and a top cover 12, the shell body 11 is a square box body, has an air inlet end 111, an air outlet end 112, a containing groove 113 and a plurality of positioning convex columns 114, the air inlet end 111 and the air outlet end 112 are respectively located at two opposite side walls of the shell body 11, and are communicated with the containing groove 113, the plurality of positioning convex columns 114 are located in the containing groove 113, in the embodiment, the positioning convex columns 114 are 4, which are respectively arranged at four corners of the containing groove 113, but not limited to this, and the top cover 12 is fixed to the shell body 11 and covers the containing groove 113.

[0059] As Figure 1A 、 Figure 1B and Figures 2A to 2DAs shown, the valve body 2 comprises an air outlet plate 21, a valve sheet 22, and a first plate member 23 which are sequentially stacked in the accommodating groove 113, and the valve sheet 22 is located between the air outlet plate 21 and the first plate member 23. The air outlet plate 21, the valve sheet 22, and the first plate member 23 are provided with positioning holes 20 corresponding to the positions of the positioning protrusions 114, respectively. Thus, the positioning holes 20 of the air outlet plate 21, the valve sheet 22, and the first plate member 23 are fitted into the positioning protrusions 114 of the housing 11, so as to position the valve body 2, thereby preventing backflow and generating unidirectional flow. In the present embodiment, the air outlet plate 21 and the first plate member 23 are metal plates, and the valve sheet 22 is a flexible film with a thickness of about 0.4-0.6 microns (μm), preferably 0.5 microns (μm). In the present embodiment, the valve sheet 22 is preferably a polyimide film, but is not limited thereto.

[0060] The air outlet plate 21 has a plurality of air outlet holes 211, the first plate member 23 has a plurality of first through holes 231, and the valve sheet 22 has a plurality of valve holes 221. The positions of the valve holes 221 are offset from the positions of the first through holes 231, so that the valve sheet 22 can close the first through holes 231. The positions of the valve holes 221 correspond to the positions of the air outlet holes 211, and the diameters d4 of the valve holes 221 are greater than or equal to the diameters d2 of the air outlet holes 211. Thus, the diameters of the air outlet holes 211 are designed to allow a large flow of air to pass through the valve holes 221 and then quickly exit through the air outlet holes 211 when the valve body 2 opens the flow path. The air outlet plate 21 has a recess 212 formed by a surface depression with a depth, and the valve sheet 22 covers the air outlet plate 21, so that the valve sheet 22 and the recess 212 of the air outlet plate 21 maintain a spacing G. The ratio between the spacing G and the thickness of the air outlet plate 21 is between 1:2 and 2:3, i.e. about 40-70 microns (μm), and is preferably 60 microns (μm) in the present embodiment. Thus, the valve body 2 is designed such that, when the valve sheet 22 is biased toward the first plate member 23, the valve sheet 22 can close the first through holes 231, and the valve body 2 operates in a closed flow path mode (as shown in Figure 3B When the valve sheet 22 is biased toward the air outlet plate 21, the valve sheet 22 can vibrate the air flow in the spacing G, and the air flow (indicated by the arrow) passes through the valve holes 221 and then quickly exits through the air outlet holes 211, and the valve body 2 operates in an open flow path mode (as shown in Figure 3C Thus, the valve body 2 is designed to prevent backflow and generate unidirectional flow control with a large flow rate.

[0061] Further, the actuating body 3 comprises a second plate member 31, a frame 32, and an actuating assembly 33. The second plate member 31 is fixed to the first plate member 23, and the thickness of the second plate member 31 is greater than that of the first plate member 23. The second plate member 31 has a plurality of second through holes 311, the number, position, and diameter of which correspond to those of the first through holes 231. In this embodiment, the diameter of the second through holes 311 is the same as that of the first through holes 231. The frame 32 has a pin 321 for connecting a wire electrically. In this embodiment, the second plate member 31 is a metal plate.

[0062] The frame 32 is arranged on the second plate member 31, and the actuating assembly 33 is arranged on the frame 32. The actuating assembly 33 comprises an air inlet plate 331, a piezoelectric sheet 332, an insulating frame 333, and a conductive frame 334.

[0063] The air inlet plate 331 has a plurality of air inlet holes 3311 arranged in a shape on the plane of the air inlet plate 331. In this embodiment, the air inlet holes 3311 are arranged in a square shape. The air inlet plate 331 defines an actuating area 3312 and a fixed area 3313 by the shape of the arrangement of the air inlet holes 3311. The actuating area 3312 is surrounded by the air inlet holes 3311, and the fixed area 3313 is located outside the air inlet holes 3311. The air inlet holes 3311 are tapered to improve the air inlet efficiency and prevent backflow of the gas. The number of the air inlet holes 3311 is even, for example, 48 or 52, but is not limited thereto. In addition, the shape of the arrangement of the air inlet holes 3311 can be rectangular, square, circular, or the like.

[0064] The piezoelectric sheet 332 is square-shaped and arranged in the actuating area 3312 of the air inlet plate 331. The piezoelectric sheet 332 corresponds to the actuating area 3312 of the air inlet plate 331. In this embodiment, when the air inlet holes 3311 are arranged in a square shape, the actuating area 3312 is defined as a square shape, and the piezoelectric sheet 332 is also square-shaped. As described above, the shape of the arrangement of the air inlet holes 3311 can be rectangular, square, circular, or the like. The shape of the actuating area 3312 changes according to the arrangement of the air inlet holes 3311, and the piezoelectric sheet 332 corresponds to the shape of the actuating area 3312.

[0065] The insulating frame 333 is disposed on the fixed area 3313 of the air inlet plate 331, and the conductive frame 334 is disposed on the insulating frame 333. The conductive frame 334 has an electrode 3341 and a pin 3342. The electrode 3341 is electrically connected to the piezoelectric sheet 332, and the pin 3342 is externally connected to a wire. The air inlet plate 331 itself is also made of conductive material and is electrically connected to the piezoelectric sheet 332. The pin 321 of the frame 32 is connected to another wire, thereby completing the driving circuit of the actuating assembly 33. Thus, the gas transmission device 100 can transmit driving signals through two wires. One wire is transmitted to the piezoelectric sheet 332 through the pin 3342 of the conductive frame 334 and the electrode 3341. The other wire is transmitted to the piezoelectric sheet 332 through the pin 321 of the frame 32, the contact between the frame 32 and the air inlet plate 331, the contact between the air inlet plate 331 and the piezoelectric sheet 332, and the contact between the piezoelectric sheet 332 and the piezoelectric sheet 332. The piezoelectric sheet 332 receives the driving signals (driving voltage and driving frequency) and deforms, thereby driving the actuating assembly 33 to move up and down (as shown in Figures 3B to 3C

[0066] The shape of the actuating assembly 33 is rectangular. In the specific embodiment, the shape of the actuating assembly 33 is square. Thus, the actuating assembly 33 has a square appearance design under the same device peripheral size. The air inlet plate 331, the piezoelectric sheet 332, the insulating frame 333, and the conductive frame 334 are also square. Compared with the traditional circular actuating assembly design, the square actuating assembly design has the advantage of power saving. The comparison of power consumption is shown in Table 1.

[0067] Table 1

[0068] Actuation assembly configuration Operating frequency Consumed power Square (10 mm side length) 18 kHz 1.1W Circular (10 mm diameter) 28 kHz 1.5W Square (9 mm side length) 22 kHz 1.3W Circular (9 mm diameter) 34 kHz 2W Square (8 mm side length) 27 kHz 1.5W Circular (8 mm diameter) 42 kHz 2.5W

[0069] Thus, the actuating assembly 33 is a capacitive load operating at a resonance frequency. The power consumption increases with the increase of the frequency. However, the resonance frequency of the square actuating assembly 33 is significantly lower than that of the circular actuating assembly. Thus, the relative power consumption is also significantly lower. That is, the square actuating assembly 33 has the advantage of power saving compared with the traditional circular actuating assembly design.

[0070] Referring to Figure 1A , Figure 1B , Figures 2A to 2D , Figures 3A to 3C and Figures 4A to 4B ​As shown, the above-mentioned air outlet plate 21, valve piece 22, first plate member 23, second plate member 31 and actuating assembly 33 are sequentially stacked in the accommodating groove 113 of the housing 11 of the shell 1, and then are fixed to the housing 11 by the top cover 12 to form the gas transmission device 100, and the actuating assembly 33 is sequentially stacked and fixed to the frame 32 by the air inlet plate 331, piezoelectric sheet 332, insulating frame 333 and conductive frame 334, and an air inlet chamber 322 is formed between the actuating assembly 33, frame 32 and second plate member 31; in addition, the first through hole 231 of the first plate member 23 and the second through hole 311 of the second plate member 31 are both located below the vertical projection area of the actuating area 3312 of the air inlet plate 331, and vertically correspond to the actuating area 3312.

[0071] In the specific embodiments of the present application, as shown in Figures 3A to 3C When the piezoelectric sheet 332 receives a driving signal (driving voltage and driving frequency), it converts electrical energy into mechanical energy through the inverse piezoelectric effect, controls the deformation amount of the piezoelectric sheet 332 according to the size of the driving voltage, and controls the deformation frequency of the piezoelectric sheet 332 by operating the driving frequency, and the deformation of the piezoelectric sheet 332 drives the actuating assembly 33 to start transmitting gas.

[0072] As shown in Figure 3B When the piezoelectric sheet 332 receives a driving signal, it starts to deform and drives the air inlet plate 331 to bend upwards, at this time the volume of the air inlet chamber 322 becomes larger and a negative pressure is formed, so that the valve piece 22 is attracted upwards and closes the first through hole 231 of the first plate member 23, at this time as shown in Figure 4A The gas on the air inlet end 111 side of the shell 11 is sucked into the actuating assembly 33 to enter the air inlet chamber 322; as shown in Figure 3C When the piezoelectric sheet 332 receives a driving signal, it starts to deform and drives the air inlet plate 331 to bend upwards, at this time the volume of the air inlet chamber 322 becomes larger and a negative pressure is formed, so that the valve piece 22 is attracted upwards and closes the first through hole 231 of the first plate member 23, at this time as shown in Figure 4B When the piezoelectric sheet 332 receives a driving signal, it starts to deform and drives the air inlet plate 331 to bend upwards, at this time the volume of the air inlet chamber 322 becomes larger and a negative pressure is formed, so that the valve piece 22 is attracted upwards and closes the first through hole 231 of the first plate member 23, at this time as shown in Figure 3BAs shown, when the piezoelectric sheet 332 drives the air inlet plate 331 to bend upward, the volume of the air inlet chamber 322 increases, and a negative pressure state is formed in the air inlet chamber 322, causing the valve sheet 22 to close the first through hole 231, so as to prevent the gas from flowing back to the air inlet chamber 322 through the valve hole 221 and the first through hole 231 and the second through hole 311, and when the gas in the accommodating groove 113 enters the air inlet chamber 322, the gas pressure in the accommodating groove 113 will be lower than the gas pressure outside the gas transmission device 100, and the gas outside the gas transmission device 100 will enter the accommodating groove 113 through the air inlet end 111 (as shown in Figure 4A When the piezoelectric sheet 332 receives a driving signal again to deform and drive the actuating assembly 33 to displace downward, the gas in the air inlet chamber 322 will be downwardly guided and finally discharged from the air outlet end 112, and the foregoing steps can be continuously performed by the driving signal, so as to quickly guide the gas from the air inlet end 111 to the air outlet end 112, thereby achieving a large flow rate.

[0073] Please refer to Figure 5 As shown, in another embodiment, the gas transmission device 100 can further include a buffer sheet 335 arranged between the piezoelectric sheet 332 and the air inlet plate 331, for adjusting the resonance frequency between the piezoelectric sheet 332 and the air inlet plate 331.

[0074] The total flow rate of the valve body 2 composed of the air outlet plate 21, the valve sheet 22 and the first plate 23 can be designed according to the diameter or number of the air outlet hole 211, the valve hole 221 and the first through hole 231, please refer to Table 2 shown below, the relationship table of the diameter and number of the air outlet hole 211 and the number of the valve hole 221 and the first through hole 231, so as to achieve the best effect of the large flow rate of the gas transmission device 100.

[0075] Table 2

[0076]

[0077] Furthermore, in the specific embodiments of the present case, the valve body 2 composed of the air outlet plate 21, the valve sheet 22, and the first plate member 23 is designed with the valve sheet 22 being a flexible thin film with a thickness of about 0.4-0.6 micrometers (μm), and the distance G between the valve sheet 22 and the recess 212 of the air outlet plate 21 being about 40-70 micrometers (μm), so that the piezoelectric sheet 332 of the actuating assembly 33 is maintained at an operating frequency of 20-22 kilohertz (kHZ), and preferably at an operating frequency of 21 kilohertz (kHZ), to maintain an oscillation of a pressure difference of 30 micrometers (μm) wavelength, and to match the 0.5 micrometers (μm) valve sheet 22 arranged in the recess 212 of the air outlet plate 21 with the distance G of 40-70 micrometers (μm) between them, so that the oscillation in the distance G forms a unidirectional flow preventing backflow of a sparse-dense wave, thereby affecting the maximum flow, and minimizing the pressure drop caused by the air flow through the valve body, which is important for maximizing the valve performance.

[0078] In summary, the gas transmission device provided in the present case is applied by sequentially stacking the air outlet plate, the valve sheet, the first plate member, the second plate member, and the square actuating assembly, and uses the valve body composed of the valve sheet, the first plate member, and the second plate member, with the first through hole, the valve hole, and the air outlet hole being located in the actuating area surrounded by the air inlet hole, so that when the piezoelectric sheet drives the air inlet plate, the gas can be quickly directed downward, and the misalignment between the first through hole and the valve hole can prevent backflow of the gas, and the structure has a large flow and prevents backflow of the gas, and when the air flow is in the forward direction, the valve body acts in the open flow path mode, and when the air flow is in the reverse direction, the valve body acts in the closed flow path mode, thereby preventing backflow and generating unidirectional air flow, which can improve the gas transmission amount and greatly improve the gas flow, and the gas transmission device with a large flow is constructed, which is very useful for industrial applications.

[0079] The present case can be modified by those skilled in the art, but it should not deviate from the scope of protection desired in the attached application for a patent.

Claims

1. A gas transmission device, comprising: An outer casing includes a housing and a top cover. The housing has an air inlet, an air outlet and a receiving groove. The receiving groove communicates with the air inlet and the air outlet, and the top cover covers the receiving groove. A valve body includes an air outlet plate, a valve plate, and a first plate that are stacked sequentially in the receiving groove. The valve plate is located between the air outlet plate and the first plate. The valve plate has a thickness of 0.4 to 0.5 micrometers. The air outlet plate has a plurality of air outlet holes, the first plate has a plurality of first through holes, and the valve plate has a plurality of valve holes. The valve holes are offset from the first through holes and are corresponding to the air outlet holes. The vent plate has a recess formed by a surface depression to a certain depth, and the valve plate covers the vent plate such that the valve plate and the recess of the vent plate maintain a distance of 40-70 micrometers; and An actuating body includes a second plate, a frame, and an actuating assembly. The second plate is stacked on the valve body and has multiple second through holes corresponding to the first through holes. The frame is stacked on the second plate, and the actuating assembly, which is rectangular in shape, is stacked on the frame. The actuation component includes: An air intake plate has multiple air intake holes. An actuating area and a fixed area are defined on the plane of the air intake plate by the position of the air intake holes. The actuating area is surrounded by the air intake holes, and the fixed area is the outer periphery of the air intake holes. A piezoelectric element is disposed in the actuation area of ​​the air intake plate; An insulating frame is disposed in the fixed area of ​​the air intake plate; and A conductive frame is disposed on the insulating frame; The first through hole, the valve hole, and the air outlet are located in the actuation area surrounded by the air inlet. When the piezoelectric sheet drives the air inlet plate, the valve body is misaligned with the first through hole and the valve hole. When the airflow is in the forward direction, the valve body opens the flow path. When the airflow is in the reverse direction, the valve body closes the flow path. The piezoelectric element is maintained at a working frequency of 20-22 kHz, causing the valve plate to oscillate within this spacing to form a unidirectional flow of a rarefaction wave, thus preventing backflow.

2. The gas transmission device as described in claim 1, characterized in that, The receiving groove is provided with multiple positioning protrusions, and the air outlet plate, the valve plate, and the first plate are respectively provided with a positioning hole corresponding to the positioning protrusion. The positioning holes of the air outlet plate, the valve plate, and the first plate are fitted into the positioning protrusions to form the valve body.

3. The gas transmission device as described in claim 1, characterized in that, The ratio between the spacing and the thickness of the vent plate is between 1:2 and 2:

3.

4. The gas transmission device as described in claim 1, characterized in that, The spacing is 60 micrometers.

5. The gas transmission device as described in claim 1, characterized in that, The valve plate is a polyimide film.

6. The gas transmission device as claimed in claim 1, characterized in that, The diameter of the valve orifice is greater than or equal to the diameter of the air outlet orifice.

7. The gas transmission device as claimed in claim 1, characterized in that, The diameter of the first through hole is the same as the diameter of the second through hole.

8. The gas transmission device as claimed in claim 1, characterized in that, The air intake is tapered.

9. The gas transmission device as claimed in claim 1, characterized in that, The number of air intake holes is even.

10. The gas transmission device as claimed in claim 9, characterized in that, There are 48 air intake holes.

11. The gas transmission device as claimed in claim 9, characterized in that, There are 52 air intake holes.

12. The gas transmission device as claimed in claim 1, characterized in that, The air intake holes are arranged in a rectangular, square, or circular shape on the air intake plate plane.

13. The gas transmission device as claimed in claim 1, characterized in that, The actuation area is square, and the piezoelectric element is square.

14. The gas transmission device as claimed in claim 1, characterized in that, It also includes a buffer sheet disposed between the air intake plate and the piezoelectric sheet.

15. The gas transmission device as claimed in claim 1, characterized in that, The vent plate, the first plate, and the second plate are all metal plates.

16. The gas transmission device as claimed in claim 1, characterized in that, The piezoelectric element of the actuation component is maintained at an operating frequency of 21 kHz.

17. The gas transmission device as claimed in claim 1, characterized in that, The diameter of the vent is 100 micrometers or 200 micrometers, the number of vents is 49, the number of valve holes is 24, and the number of first through holes is 20.

18. The gas transmission device as claimed in claim 1, characterized in that, The vent has a diameter of 300 micrometers or 400 micrometers, there are 36 vents, there are 18 valve holes, and there are 18 first through holes.

19. The gas transmission device as claimed in claim 1, characterized in that, The diameter of the vent is 500 micrometers, the number of vents is 25, the number of valve holes is 12, and the number of first through holes is 12.

20. The gas transmission device as claimed in claim 1, characterized in that, The vent has a diameter of 600 micrometers, 700 micrometers, or 800 micrometers, and there are 25 vents, 12 valve holes, and 10 first through holes.

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