TW202138677A - Thin gas transportation device - Google Patents

Abstract

A thin gas transportation device is disclosed and includes a bottom plate, an air pump and a top cover. The bottom plate includes a first bottom surface, a second bottom surface, an accommodation groove, an air outlet groove, a fixing portion, a ventilation hole, a bead, an air inlet pipe and an air outlet pipe. The first bottom surface is concaved to form the accommodation groove, and the accommodation groove includes an accommodation bottom surface. The accommodation bottom surface is concaved to form the gas outlet groove, and the gas outlet groove includes a gas outlet passage. The fixing portion is disposed around the accommodation groove. The ventilation hole is located in the fixing portion and includes an air inlet end and an air ventilation end. The air ventilation end is in communication with the accommodation groove, and the ventilation hole is gradually tapered from the ventilation end to the air inlet end. The bead is disposed in the ventilation hole. The air inlet pipe is in communication with the air inlet end of the ventilation hole. The air outlet pipe is in communication with air outlet passage of the air outlet groove. The air pump is disposed on the accommodation bottom plate of the accommodation groove and seals the air outlet groove. The top cover is fixed on the fixing portion and seals the accommodation groove. The diameter of the bead is set in a range between the diameters of the ventilation end and the air inlet end.

Description

Thin gas transmission device

This case is about a thin gas transmission device, especially a thin gas transmission device that can avoid gas backflow.

With the rapid development of technology, the application of gas delivery devices has become more and more diversified. For example, industrial applications, biomedical applications, medical care, electronic heat dissipation, etc., even the recently popular wearable devices can be seen in its shadow. Traditional pumps have gradually become smaller and larger flow rates.

After the current thin gas transmission device inflates an airbag, when the inflation is completed and the thin gas transmission device stops operating, the phenomenon of gas backflow often occurs, which makes the airbag pressure insufficient, so how to stop the thin gas transmission device , Avoiding gas backflow is a problem that needs to be solved at present.

The main purpose of this case is to provide a thin gas transmission device, which utilizes the tapered vent hole to be equipped with locking beads to achieve the effect of prohibiting gas backflow.

A broad implementation aspect of this case is a thin gas transmission device, including: a bottom plate having: a first bottom surface; a second bottom surface opposite to the first bottom surface; The bottom surface is recessed and is provided with a receiving bottom surface; an air outlet groove is recessed and formed from the receiving bottom surface and is provided with an air outlet channel; a positioning portion protrudes from the first bottom surface and surrounds the receiving groove; and a vent hole, Located at the fixed part, it has an air inlet end and a vent end, the vent end communicates with the accommodating groove, wherein the vent hole gradually shrinks from the vent end to the air inlet end; a locking bead is accommodated in the accommodating groove Vent hole; an air inlet pipe connected to the inlet end of the vent hole; and an air outlet pipe connected to the air outlet channel of the air outlet groove; a gas pump arranged in the accommodating groove of the accommodating groove The bottom surface covers the air outlet groove; and a top cover fixed on the positioning portion and covers the containing groove, wherein the diameter of the locking ball is between the diameter of the vent end and the diameter of the inlet end.

Some typical embodiments embodying the features and advantages of this case will be described in detail in the following description. It should be understood that this case can have various changes in different aspects, all of which do not depart from the scope of the case, and the descriptions and diagrams therein are essentially for illustrative purposes, rather than limiting the case.

Please refer to Figure 1A and Figure 1B. This case provides a thin gas transmission device 100, which includes a bottom plate 1, a gas pump 2 and a top cover 3. The gas pump 2 is housed in the bottom plate 1, and the top cover 3 is fixed on the bottom plate 1.

Please refer to Figures 2A and 2B, the bottom plate 1 includes a first bottom surface 11, a second bottom surface 12, a receiving groove 13, an air outlet groove 14, a positioning portion 15, a vent hole 16, a The locking ball 17, an air inlet pipe 18, an air outlet pipe 19, the first side wall 1a, the second side wall 1b, the third side wall 1c and the fourth side wall 1d, the first bottom surface 11 and the second bottom surface 12 are two opposite to each other The accommodating groove 13 is recessed from the first bottom surface 11 and has a accommodating bottom surface 131. The air outlet groove 14 is recessed from the accommodating bottom surface 131. The air outlet groove 14 has a side wall 141 and an air outlet channel 142. The channel 142 is located on the side wall 141, the positioning portion 15 is square, protruding from the first bottom surface 11 and arranged around the containing groove 13, and the vent hole 16 is located on the positioning portion 15 and has an air inlet end 161 and a vent end 162 The vent end 162 is connected to the accommodating groove 13, the air inlet pipe 18 extends outward from the first side wall 1a, and is connected to the air inlet end 161 of the vent hole 16, and the outlet pipe 19 extends from the third side wall 1c of the first side wall 1a. It extends outside and communicates with the air outlet channel 142 of the air outlet groove 14, wherein the air inlet pipe 18 and the air outlet pipe 19 are arranged in a staggered manner; it is worth noting that the air inlet pipe 18 and the air outlet pipe 19 can also be arranged on the second side wall 1b or The fourth side wall 1d is not limited to this.

As mentioned above, the locking bead 17 is a round bead, the vent hole 16 is a round through hole, and the diameter of the locking bead 17 is between the diameter of the vent end 162 of the vent hole 16 and the diameter of the inlet end 161; the lock bead The diameter of 17 may be between 0.5 mm and 1 mm. In one embodiment, the diameter of the lock ball 17 is 0.8 mm, and the lock ball 17 may be a steel ball.

The vent hole 16 is tapered from the vent end 162 to the intake end 161, and is accommodated in the locking bead 17. The inclination angle of the conical vent hole 16 is between 10 degrees and 14 degrees, and is in a range of 10 degrees to 14 degrees. In the embodiment, the inclination angle is 12 degrees, wherein the diameter of the inlet end 161 is 0.68 mm, and the diameter of the vent end 162 is 1.2 mm.

As shown in Fig. 1, the gas pump 2 is disposed on the accommodating bottom surface 131 of the accommodating groove 13 and covers the gas outlet groove 14. Please refer to Figs. 3A and 3B again. The gas pump 2 includes an inlet plate 21, a The resonant sheet 22, a piezoelectric actuator 23, a first insulating sheet 24, a conductive sheet 25, and a second insulating sheet 26 are stacked and assembled in sequence. The inlet plate 21 has at least one inlet hole 21a, at least one busbar groove 21b, and a busbar chamber 21c. The inlet hole 21a is for introducing gas, and the inlet hole 21a corresponds to the busbar groove 21b, and the busbar groove 21b Confluence to the confluence chamber 21c, so that the gas introduced by the inlet hole 21a can be converged into the confluence chamber 21c. In this embodiment, the number of inlet holes 21a and busbar grooves 21b is the same, and the number of inlet holes 21a and busbar grooves 21b is 4 respectively, which is not limited to this. The 4 inlet holes 21a respectively penetrate through There are four busbar grooves 21b, and the four busbar grooves 21b converge to the confluence chamber 21c.

Please refer to Figure 3A, Figure 3B and Figure 4A, the above-mentioned resonant sheet 22 is assembled on the inlet plate 21 by bonding, and the resonant sheet 22 has a hollow hole 22a, a movable portion 22b, and A fixed part 22c, the hollow hole 22a is located at the center of the resonance plate 22 and corresponds to the confluence chamber 21c of the inlet plate 21, and the movable part 22b is arranged around the hollow hole 22a and is opposite to the confluence chamber 21c, The fixing portion 22c is disposed on the outer peripheral edge portion of the resonant sheet 22 and adhered to the inlet plate 21.

Please continue to refer to FIGS. 3A, 3B, and 4A. As shown in FIGS. 3A, 3B, and 4A, the above-mentioned piezoelectric actuator 23 is joined to the resonant plate 22 and arranged corresponding to the resonant plate 22, and includes a suspension plate 23a and an outer frame 23b. , At least one bracket 23c, one piezoelectric element 23d, at least one gap 23e and one convex portion 23f. Among them, the suspension board 23a is a square shape. The reason why the suspension board 23a adopts a square shape is that compared with the design of a circular suspension board, the structure of the square suspension board 23a obviously has the advantage of saving electricity, because it is operated at the resonance frequency. For capacitive loads, the power consumption will increase as the frequency rises, and since the resonance frequency of the side-length square suspension plate 23a is significantly lower than that of the circular suspension plate, its relative power consumption is also significantly lower, which is the case used in this case The suspension board 23a with a square design has the advantage of power saving; the outer frame 23b is arranged around the outer side of the suspension board 23a; at least one bracket 23c is connected between the suspension board 23a and the outer frame 23b to provide elastic support for the suspension board 23a Supporting force; and a piezoelectric element 23d has a side length that is less than or equal to the side length of a suspension plate 23a of the suspension plate 23a, and the piezoelectric element 23d is attached to a surface of the suspension plate 23a for applying voltage To drive the suspension plate 23a to bend and vibrate; and at least one gap 23e is formed between the suspension plate 23a, the outer frame 23b and the bracket 23c for gas to pass through; the convex part 23f is arranged on the surface of the suspension plate 23a where the piezoelectric element 23d is attached On the opposite surface of the piezo element 23d, in this embodiment, the convex portion 23f can be formed on the opposite surface of the surface to which the piezoelectric element 23d is attached through the suspension plate 23a by an etching process. A convex structure.

Please continue to refer to Figure 3A, Figure 3B and Figure 4A, the above-mentioned inlet plate 21, resonance sheet 22, piezoelectric actuator 23, first insulating sheet 24, conductive sheet 25 and second insulating sheet 26 Stacked in sequence, where a cavity space 27 is formed between the suspension plate 23a of the piezoelectric actuator 23 and the resonant plate 22, and the cavity space 27 can be used in the outer frame of the resonant plate 22 and the piezoelectric actuator 23 The gap between 23b is filled with a material, such as conductive glue, but not limited to this, so that a certain depth can be maintained between the resonance sheet 22 and a surface of the suspension plate 23a to form a cavity space 27, which can then be guided The gas flows more quickly, and because the suspension plate 23a and the resonance plate 22 are kept at an appropriate distance, the contact interference with each other is reduced, and the noise generation can be reduced. Of course, in another embodiment, the piezoelectric actuator 23 can also be used The height of the outer frame 23b is increased to reduce the thickness of the conductive glue filled in the gap between the resonant sheet 22 and the outer frame 23b of the piezoelectric actuator 23, so that the overall structure of the gas pump 2 is assembled without heat due to the filling material of the conductive glue. The pressure temperature and the cooling temperature are indirectly affected, so as to prevent the filling material of the conductive adhesive from affecting the actual spacing of the cavity space 27 after molding due to thermal expansion and contraction, but it is not limited to this. In addition, the chamber space 27 will affect the transmission effect of the gas pump 2, so maintaining a fixed chamber space 27 is very important for the gas pump 2 to provide stable transmission efficiency.

In order to understand the output operation mode of the gas transmission provided by the gas pump 2, please continue to refer to Figures 4B to 4D. Please refer to Figure 4B first. After the piezoelectric element 23d of the piezoelectric actuator 23 is applied with a driving voltage The deformation causes the suspension plate 23a to move downward. At this time, the volume of the chamber space 27 increases, and a negative pressure is formed in the chamber space 27, and the gas in the confluence chamber 21c is drawn into the chamber space 27, and the resonance plate 22 is synchronously displaced downward under the influence of the resonance principle, which increases the volume of the confluence chamber 21c, and the gas in the confluence chamber 21c enters the chamber space 27, resulting in a negative pressure in the confluence chamber 21c. , And then suck the gas into the confluence chamber 21c through the inlet hole 21a and the busbar groove 21b; please refer to Figure 4C again, the piezoelectric element 23d drives the suspension plate 23a to move upward, compressing the chamber space 27, the same, resonance The sheet 22 is displaced upward by the levitation plate 23a due to resonance, forcing the gas in the chamber space 27 to be simultaneously pushed down and transmitted downward through the gap 23e to achieve the effect of transmitting the gas; finally, please refer to Figure 4D, when the levitation plate 23a When returning to the original position, the resonant plate 22 is still displaced downward due to inertia. At this time, the resonant plate 22 will move the gas in the compression chamber space 27 to the gap 23e, and increase the volume in the confluence chamber 21c, so that the gas can be Continuously pass through the inlet hole 21a and the busbar groove 21b to converge in the converging chamber 21c. By continuously repeating the gas pump 2 as shown in Figures 4C to 4E above, the gas pump 2 provides gas transmission operation steps, so that the gas pump 2 can The gas continuously enters the flow channel formed by the inlet plate 21 and the resonance plate 22 from the inlet hole 21a to generate a pressure gradient, and then is transmitted downward through the gap 23e to make the gas flow at a high speed to achieve the actuation operation of the gas pump 2 to transmit the gas output.

Figure 5A is the AA cross-sectional view of 1A, and Figure 5B is the BB cross-sectional view of 1A. Please refer to Figure 5A. When the gas pump 2 is activated, the gas in the accommodating tank 13 is drawn downwards. Transported to the air outlet groove 14, at this time the accommodating groove 13 presents a negative pressure state, the gas outside the thin gas transmission device 100 will enter from the air inlet pipe 18 of the bottom plate 1, and push up the locking bead 17 located in the vent hole 16 , The blocking ball 17 is separated from the inlet end 161 of the vent hole 16, and the gas can enter the vent hole 16 from the inlet pipe 18 through the inlet end 161, and because the diameter of the vent end 162 is larger than the diameter of the blocking ball 17, the lock The bead 17 cannot close the vent port 162, so that the gas will enter the accommodating tank 13 through the vent port 162 and continue to be transported to the gas outlet groove 14; please refer to Figure 5B again, after the gas is guided to the gas outlet groove 14, it passes through the gas outlet The passage 142 enters the gas outlet pipe 19 and is discharged from the gas outlet pipe 19 to complete the process of gas delivery.

Please review Figure 5C again. At the moment when the gas pump 2 stops operating, the gas pressure in the accommodating tank 13 is higher than the gas pressure outside the thin gas transmission device 100, causing the gas to be guided from the accommodating tank 13 to the vent 16 , And push the blocking ball 17 located at the vent end 162 to the inlet end 161. Since the diameter of the blocking ball 17 is larger than the diameter of the inlet end 161, when the blocking ball 17 is pushed to the inlet end 161, it will close the inlet At the end 161, the stop gas passes through the inlet end 161 to achieve the effect of preventing the gas from flowing backward.

Please refer to FIGS. 1B and 5C again. The positioning portion 15 of the bottom plate 1 has at least one fixing hole 151. In this embodiment, the number of fixing holes 151 is three, but it is not limited to this. The top cover 3 There is at least one fixing post 31, the number and positions of the fixing posts 31 are corresponding to the fixing holes 151, and are respectively penetrated into the corresponding fixing holes 151 for positioning and fixing.

To sum up, the thin gas transmission device provided in this case, through the setting of blocking beads in the conical vent hole, when the gas pump is operating, the blocking beads are guided to the venting end through the air pressure, so that the gas outside the micro gas transmission device can be It enters from the intake end. When the gas pump stops operating, the lock bead is guided to the intake end by air pressure, and the intake end is closed to prevent the gas from flowing back through the intake pipe, which is extremely industrially applicable.

This case can be modified in many ways by those who are familiar with this technology, but none of them deviates from the protection of the scope of the patent application.

100: Thin gas transmission device 1: bottom plate 11: The first bottom surface 12: second bottom surface 13: accommodating slot 131: Hold the bottom 14: Vent slot 141: side wall 142: Exhaust Channel 15: Positioning department 151: fixed hole 16: vent 161: intake end 162: Vent End 17: Locking bead 18: intake pipe 19: Exhaust pipe 1a: first side wall 1b: second side wall 1c: third side wall 1d: Fourth side wall 2: Gas pump 21: Inflow plate 21a: Inlet hole 21b: Busbar slot 21c: Confluence chamber 22: Resonance film 22a: Hollow hole 22b: movable part 22c: Fixed part 23: Piezo Actuator 23a: Suspension board 23b: Outer frame 23c: bracket 23d: Piezoelectric element 23e: gap 23f: Convex 24: The first insulating sheet 25: conductive sheet 26: second insulating sheet 27: Chamber space 3: top cover 31: fixed column A-A, B-B: Section line

Figure 1A is a three-dimensional schematic diagram of the thin gas transmission device of this project. Figure 1B is an exploded schematic diagram of the thin gas transmission device in this case. Figure 2A is a three-dimensional schematic diagram of the bottom plate of the project. Figure 2B is an upside-down view of the bottom plate of the project. Figure 3A is an exploded schematic diagram of the gas pump in this case. Figure 3B is an exploded schematic diagram of the gas pump of the present case from another angle. Figure 4A is a schematic cross-sectional view of the gas pump in this case. Figures 4B to 4D are schematic diagrams of the operation of the gas pump in this case. Figures 5A and 5B are schematic diagrams of the air flow of the thin gas transmission device of the present invention. Figure 5C is a schematic diagram of the thin gas transmission device in this case to avoid gas backflow.

100: Thin gas transmission device

1: bottom plate

11: The first bottom surface

13: accommodating slot

131: Hold the bottom

14: Vent slot

15: Positioning department

151: fixed hole

16: vent

17: Locking bead

18: intake pipe

19: Exhaust pipe

2: Gas pump

3: top cover

31: fixed column

Claims (8)

A thin gas transmission device, including: A base plate with: A first bottom surface; A second bottom surface opposite to the first bottom surface; An accommodating groove formed recessed from the first bottom surface and provided with an accommodating bottom surface; An air outlet groove is formed recessed from the bottom surface of the containing, and is provided with an air outlet channel; A positioning portion protruding from the first bottom surface and surrounding the accommodating groove; A vent hole located at the positioning part, having an air inlet end and a vent end, the vent end communicates with the accommodating groove, wherein the vent hole is tapered from the vent end to the air inlet end; A locking bead is accommodated in the vent hole; An air inlet pipe communicating with the air inlet end of the vent hole; and An air outlet pipe communicates with the air outlet channel of the air outlet groove; A gas pump arranged on the accommodating bottom surface of the accommodating groove and covering the gas outlet groove; and A top cover fixed on the positioning part and covering the accommodating groove; Wherein, the diameter of the blocking bead is between the diameter of the vent end and the diameter of the inlet end. The thin gas transmission device according to claim 1, wherein the diameter of the blocking bead is between 0.5 mm and 1 mm. The thin gas transmission device according to claim 2, wherein the diameter of the blocking bead is 0.8 mm. The thin gas transmission device according to claim 1, wherein the locking ball is a steel ball. The thin gas transmission device according to claim 1, wherein the positioning portion has at least one fixing hole, and the top cover has at least one fixing post passing through the at least one fixing hole. The thin gas transmission device according to claim 1, wherein the gas pump has: An inlet plate has at least one inlet hole, at least one busbar groove and a bus chamber, wherein the inlet hole is provided for introducing a gas, the inlet hole correspondingly penetrates the busbar groove, and the busbar groove Converge to the confluence chamber, so that the gas introduced by the inlet hole converges into the confluence chamber; A resonance sheet is joined to the inlet plate and has a hollow hole, a movable part and a fixed part. The hollow hole is located at the center of the resonance sheet and corresponds to the confluence chamber of the inlet plate, and the The movable part is arranged around the hollow hole and the area opposite to the confluence chamber, and the fixed part is arranged on the outer peripheral part of the resonant sheet to be adhered to the inlet plate; and A piezoelectric actuator joined to the resonant sheet and arranged corresponding to the resonant sheet; Wherein, there is a cavity space between the resonant plate and the piezoelectric actuator, so that when the piezoelectric actuator is driven, the gas is introduced from the inlet hole of the inlet plate and flows through the confluence The row grooves are collected into the confluence chamber, and then flow through the hollow hole of the resonant plate, and the piezoelectric actuator and the movable part of the resonant plate resonate to transmit the gas. The thin gas transmission device according to claim 6, wherein the piezoelectric actuator comprises: A suspension board, with a square shape, can bend and vibrate; An outer frame arranged around the outer side of the suspension board; At least one bracket is connected between the suspension board and the outer frame to provide elastic support for the suspension board; and A piezoelectric element has a side length, the side length is less than or equal to the side length of a suspension plate of the suspension plate, and the piezoelectric element is attached to a surface of the suspension plate for applying a voltage to drive the suspension plate Flexural vibration. The thin gas transmission device according to claim 7, wherein the gas pump further includes a first insulating sheet, a conductive sheet, and a second insulating sheet, wherein the inlet plate, the resonance sheet, and the piezoelectric actuator , The first insulating sheet, the conductive sheet and the second insulating sheet are stacked and assembled in sequence.

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