Quick relief valve assembly and integrated diaphragm pump for its application

Abstract

The invention discloses a quick pressure relief valve assembly, which is installed under the upper cover of a pump and includes an air outlet diaphragm, an air release diaphragm and a diaphragm pressure plate; the air outlet diaphragm forms a tympanic membrane, and the top of the tympanic membrane has a first center piece for corresponding to the pressure relief hole of the upper cover; the diaphragm pressure plate covers the tympanic membrane of the air outlet diaphragm, and the top of the diaphragm pressure plate is provided with a center hole for the first center piece to be exposed; the air release diaphragm is fixed on the top of the diaphragm pressure plate, and the air release diaphragm has a second center piece for corresponding to the pressure relief hole of the upper cover, and the second center piece corresponds to the first center piece through the center hole of the diaphragm pressure plate, and the upper surface area of ​​the second center piece is smaller than the lower surface area of ​​the first center piece, and the air release diaphragm, the diaphragm pressure plate and the tympanic membrane form a normal pressure cavity connected to the atmosphere. A diaphragm pump using the quick pressure relief valve assembly is also disclosed. The invention uses the pressure difference between the first and second center pieces of gas to control the opening and closing of the pressure relief hole, replacing the traditional technology that simply relies on gas pressure control, and realizes quick air release and stable inflation.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm pumps, and in particular to a quick pressure relief valve assembly structure and an integrated diaphragm pump using the quick pressure relief valve assembly. Background Art

[0002] In medical blood pressure monitors, especially step-up blood pressure monitors, an air pump and a normally closed solenoid valve are normally used. When the inflation reaches a certain pressure value, the solenoid valve is powered on to open and release the pressure. In order to reduce costs, the solenoid valve is omitted, but the function is integrated into the air pump. Some industry insiders have specially developed an integrated pump that can achieve rapid pressure relief.

[0003] For example: CN201510505369.2 and CN201821850946.7, see Figure 1 and Figure 2 When the pump body is inflated, the gas blown out of the airbag enters the air outlet cavity 700, and the gas first enters an intermediate air chamber 100 through an air inlet hole 800, and then is divided to both sides by the intermediate air chamber 100. A part of the gas acts on the deflation valve 200, so that the deflation valve 200 can be lifted up and the pressure relief port 300 can be blocked during inflation, and the other part acts on the one-way valve 400, so that the one-way valve 400 is opened, and the gas is discharged from the air outlet 500 to achieve inflation; when deflation, the one-way valve 400 is closed, and the gas enters the top air chamber 600 from the air outlet 500. Because the intermediate air chamber 100 is provided with a pressure reduction channel 910 or 920 connected to the atmosphere, a pressure difference is formed between the top air chamber 600 and the intermediate air chamber 100, and the pressure relief valve 200 is pressed downward, the pressure relief port 300 is opened, and the gas is discharged from the pressure relief port 300 to achieve deflation.

[0004] A careful analysis of these quick pressure relief structures reveals that they all have the following problems: the upper and lower areas of these deflation valves 200 are basically the same. When inflating, the pressure relief port 300 is blocked by the pressure difference (pressure difference) between the middle air chamber 100 and the top air chamber 600, that is, the inflation pressure must be large enough to push the deflation valve 200 upward to block the pressure relief port 300. When the inflation starts, the gas enters the middle air chamber 100 and is first diverted. The pressure acting on the deflation valve 200 is relatively small, and the pressure difference between the middle air chamber 100 and the top air chamber 600 is also small, so that the deflation valve 200 cannot quickly block the pressure relief port 300. At the same time, after the gas enters the middle air chamber 100, when inflating through the one-way valve 400, because the pressure relief port 300 is not blocked in time, inflation and deflation occur at the same time, making inflation unstable and slow.

[0005] Moreover, the original intention of designing the pressure-reducing channels 910 and 920 on these pump bodies is that when the air pump is inflating, the air leakage generated is not enough to affect the speed of inflation; when the air pump is powered off and stops inflating, the intermediate air chamber 100 can be quickly reduced to atmospheric pressure because the pressure-reducing channel 910 or 920 is connected to the atmosphere, so that the air relief valve 200 can quickly open the pressure relief port 300 under the action of the pressure difference, thereby accelerating the pressure relief. However, Figure 1 The pressure reducing channels 910 are two through holes directly opened on the diaphragm positioning plate 930 of the air relief valve 200. Figure 2 The pressure reduction channel 920 is a groove directly opened on the diaphragm positioning plate 930 of the relief valve 200. Such pressure reduction channels 910 and 920 are always in a completely open state, and the channel cross-sectional area is difficult to control and cannot be made small enough. In fact, the ventilation volume cannot be adjusted and controlled, and the pressure reduction speed cannot be controlled. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a quick pressure relief valve assembly and an integrated diaphragm pump using the quick pressure relief valve assembly, which can not only achieve quick deflation but also stable inflation.

[0007] In order to achieve the above object, the solution of the present invention is:

[0008] The quick pressure relief valve assembly is installed in the air path below the upper cover of the pump, and includes an air outlet diaphragm, an air release diaphragm and a diaphragm pressure plate; the air outlet diaphragm forms a tympanic membrane, and the top of the tympanic membrane has a first center piece for corresponding to the pressure relief hole of the upper cover; the diaphragm pressure plate covers the tympanic membrane of the air outlet diaphragm, and the top of the diaphragm pressure plate is provided with a center hole for exposing the first center piece; the air release diaphragm is fixed on the top of the diaphragm pressure plate, and the air release diaphragm has a second center piece for corresponding to the pressure relief hole of the upper cover, and the second center piece corresponds to the first center piece (fitting or not fitting) through the center hole of the diaphragm pressure plate, and the upper surface area of ​​the second center piece is smaller than the lower surface area of ​​the first center piece, and a normal pressure cavity is formed between the air release diaphragm, the diaphragm pressure plate and the tympanic membrane and connected to the atmosphere.

[0009] The air outlet diaphragm forms a normal pressure pore outside the eardrum to communicate with the atmosphere, and the bottom of the diaphragm pressure plate forms a first normal pressure channel to connect the normal pressure cavity and the normal pressure pore, so that the normal pressure cavity is connected to the atmosphere through the first normal pressure channel and the normal pressure pore.

[0010] The bottom of the diaphragm pressing plate forms a pressing edge, which is pressed tightly on the air outlet diaphragm at the root of the eardrum.

[0011] An annular positioning groove is formed on the top of the diaphragm pressing plate, corresponding to the annular pressure wall in the upper cover; a notch is provided on the annular pressure wall near the air outlet of the upper cover for air flow to pass through; an annular positioning strip is correspondingly formed around the periphery of the air-deflating diaphragm; the annular positioning strip of the air-deflating diaphragm is arranged in the annular positioning groove of the diaphragm pressing plate; the annular pressure wall of the upper cover is pressed tightly against the annular positioning strip of the air-deflating diaphragm, so that the air-deflating diaphragm is fixed on the top of the diaphragm pressing plate.

[0012] The air outlet diaphragm forms a one-way air outlet valve sheet outside the eardrum.

[0013] An integrated diaphragm pump is assembled in sequence on the airbag seat of the airbag with a diaphragm positioning plate, the above-mentioned quick pressure relief valve assembly and an upper cover; an air inlet hole is provided on the diaphragm positioning plate corresponding to the eardrum of the air outlet diaphragm in the above-mentioned quick pressure relief valve assembly, and the air inlet hole directly or indirectly connects the eardrum with the airbag; a first air flow channel is formed between the air outlet diaphragm and the diaphragm positioning plate and is connected to the eardrum, a one-way air outlet valve sheet is provided on the outlet of the first air flow channel, and the first air flow channel is connected to the atmosphere through a pressure reducing microchannel; a second air flow channel is formed between the air relief diaphragm, the diaphragm pressure plate, the air outlet diaphragm, the one-way air outlet valve sheet and the upper cover and is connected to the air outlet hole and the pressure relief hole of the upper cover.

[0014] There are two airbags, the air inlet of the diaphragm positioning plate is directly or indirectly connected to one airbag, and the air outlet of the other airbag is directly connected to the outside atmosphere.

[0015] A valve seat is assembled between the airbag seat and the diaphragm positioning plate of the airbag, and an air outlet valve is installed on the valve seat at a position corresponding to the airbag. A third air flow channel is formed between the valve seat and the diaphragm positioning plate. The air inlet hole of the diaphragm positioning plate is connected to the third air flow channel and the inside of the eardrum. The eardrum is indirectly connected to the airbag through the air inlet hole of the diaphragm positioning plate, the third air flow channel and the valve seat.

[0016] The one-way air outlet valve sheet is an umbrella-shaped valve or other forms, or the one-way air outlet valve sheet is integrally formed outside the eardrum of the air outlet diaphragm, such as in the shape of a small human head or the form of the one-way valve 400 of CN201510505369.2.

[0017] The air inlet hole of the diaphragm positioning plate is provided with a one-way air inlet valve, which is an umbrella-shaped valve or other forms, or the one-way air inlet valve is integrally formed below the tympanic membrane of the air outlet diaphragm, such as in the shape of a small human head.

[0018] The air outlet diaphragm forms a normal-pressure air hole outside the eardrum, and a second normal-pressure channel is opened on the diaphragm positioning plate to connect the normal-pressure air hole of the air outlet diaphragm with the atmosphere. A first normal-pressure channel is formed at the bottom of the diaphragm pressure plate to connect the normal-pressure cavity and the normal-pressure air hole, so that the normal-pressure cavity is connected to the atmosphere through the first normal-pressure channel, the normal-pressure air hole, and the second normal-pressure channel.

[0019] A pressure-reducing microchannel is formed between the air outlet diaphragm and the diaphragm positioning plate to connect the first airflow channel with the atmosphere. Specifically, the pressure-reducing microchannel can be formed by a depression on the upper surface of the diaphragm positioning plate. Alternatively, a conical hole that is larger at the top and smaller at the bottom is formed on the diaphragm positioning plate, and a steel ball is loaded into the conical hole. The upper end of the conical hole is connected to the first airflow channel, and the lower end of the conical hole is connected to the side guide groove on the lower surface of the diaphragm positioning plate. The side guide groove is connected to the atmosphere. The conical hole, the gap between the conical hole and the steel ball, and the side guide groove constitute the pressure-reducing microchannel. The lower surface of the air outlet diaphragm corresponds to the conical hole of the diaphragm positioning plate to form a pressing block, and the pressing block is pressed on the steel ball to position the steel ball.

[0020] The first air flow channel between the air outlet diaphragm and the diaphragm positioning plate is formed by a depression on the upper surface of the diaphragm positioning plate. One end of the first air flow channel is located below the eardrum and the other end is located below the eardrum.

[0021] A diaphragm mounting groove is formed on the upper surface of the diaphragm positioning plate, and the air outlet diaphragm is arranged in the diaphragm mounting groove. A pressing edge is formed on the lower surface of the upper cover corresponding to the edge of the air outlet diaphragm. The air outlet diaphragm is positioned and assembled in the diaphragm mounting groove by means of the tight fit between the pressing edge and the edge of the air outlet diaphragm.

[0022] A clamping column and a clamping groove which cooperate with each other are formed between the diaphragm positioning plate and the upper cover, and the diaphragm positioning plate and the upper cover are positioned and assembled together by means of the clamping column and the clamping groove.

[0023] The upper cover forms a pressure relief boss at the edge of the pressure relief hole.

[0024] The upper cover is provided with an anti-fouling block for easy assembly.

[0025] After adopting the above scheme, the present invention changes the way of controlling the switch of the pressure relief hole, comprehensively considers the size of the air pressure (pressure) and the size of the effective area, and uses the pressure difference between the gas acting on the lower surface of the first center piece and the upper surface of the second center piece to control the opening and closing of the pressure relief hole, replacing the traditional technology that simply relies on air pressure (pressure) control. Because the lower surface area of ​​the first center piece is larger than the upper surface area of ​​the second center piece, when just inflated, although the gas acts on the first center piece and the second center piece with only a small air pressure difference (pressure difference), a large pressure difference can still be obtained on the first center piece and the second center piece. The pressure of the inflated gas acting on the first center piece is much greater than the pressure of the second center piece. Such a large pressure difference pushes the first center piece to quickly lift the second center piece upward, thereby quickly blocking the pressure relief hole. No leakage will occur when continuing to inflate, and the inflation is more stable and the inflation speed is increased. When inflation stops, because the pressure-reducing microchannel reduces the air pressure on the lower surface of the first center piece to atmospheric pressure, the air pressure acting on the upper surface of the second center piece is significantly greater than the air pressure acting on the lower surface of the first center piece, which is sufficient to separate the second center piece from the pressure relief hole, and the gas is discharged from the pressure relief hole, thereby achieving the purpose of rapid pressure relief.

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of CN201510505369.2;

[0028] Figure 2 It is a structural diagram of CN201821850946.7;

[0029] Figure 3 is an exploded top view of a quick pressure relief valve assembly combined with an upper cover and a diaphragm positioning plate according to a first embodiment of the present invention;

[0030] Figure 4 It is an exploded bottom view of a quick pressure relief valve assembly combined with an upper cover and a diaphragm positioning plate according to a first embodiment of the present invention;

[0031] Figure 5 is a top view of the air outlet diaphragm of Example 1;

[0032] Figure 6 is a cross-sectional view of the air outlet diaphragm of the first embodiment;

[0033] Figure 7 is a top view of the deflated diaphragm of Example 1;

[0034] Figure 8 is a cross-sectional view of the deflated diaphragm of Example 1;

[0035] Fig. 9 is a top view of the diaphragm pressure plate of Example 1;

[0036] Fig.10 is a bottom view of the diaphragm pressing plate of the first embodiment;

[0037] Fig.11 is a cross-sectional view of a diaphragm pressure plate of Example 1;

[0038] Fig.12 is a top view of the diaphragm positioning plate of the first embodiment;

[0039] Fig.13 is a cross-sectional view of a diaphragm positioning plate of Embodiment 1;

[0040] Fig.14 is a top view of the upper cover of the first embodiment;

[0041] Fig.15 is a bottom view of the upper cover of the first embodiment;

[0042] Fig.16 is a cross-sectional view of the upper cover of the first embodiment;

[0043] Fig.17It is a combined cross-sectional view of the first embodiment of the integrated diaphragm pump of the present invention;

[0044] Fig.18 is an exploded top view of the first embodiment of the integrated diaphragm pump of the present invention;

[0045] Fig.19 is an exploded bottom view of the first embodiment of the integrated diaphragm pump of the present invention;

[0046] Fig. 20 is an exploded top view of a quick pressure relief valve assembly combined with an upper cover and a diaphragm positioning plate according to a second embodiment of the present invention;

[0047] Fig.21 is an exploded bottom view of a quick pressure relief valve assembly combined with an upper cover and a diaphragm positioning plate according to a second embodiment of the present invention;

[0048] Fig. 22 is a top view of the diaphragm positioning plate of the second embodiment;

[0049] Fig.23 is a cross-sectional view of the diaphragm positioning plate of the second embodiment;

[0050] Fig.24 is a cross-sectional view of the cooperation between the diaphragm positioning plate and the air outlet diaphragm of the second embodiment;

[0051] Fig.25 is a bottom view of the upper cover of the second embodiment;

[0052] Fig.26 is an exploded top view of a second embodiment of the integrated diaphragm pump of the present invention;

[0053] Fig. 27 It is an exploded bottom view of the second embodiment of the integrated diaphragm pump of the present invention;

[0054] Fig.28 It is a combined cross-sectional view of the third embodiment of the integrated diaphragm pump of the present invention;

[0055] Fig.29 It is a schematic diagram of the force exerted by gas on the outlet diaphragm and the exhaust diaphragm during use.

[0056] Description of symbols

[0057] The middle air chamber 100, the air relief valve 200, the pressure relief port 300, the one-way valve 400, the air outlet 500, the top air chamber 600, the air outlet cavity 700, the air inlet 800, the pressure reduction channels 910 and 920, and the diaphragm positioning plate 930;

[0058] Upper cover 1, pressure relief hole 11, air outlet 12, annular pressure wall 13, notch 14, slot 15, pressure relief boss 16, foolproof block 17, pressure edge 18;

[0059] The deflated diaphragm 2, the second center piece 21, the annular positioning strip 22;

[0060] Diaphragm pressure plate 3, central hole 31, pressure edge 32, annular positioning groove 33, first normal pressure channel 34;

[0061] An air outlet diaphragm 4, a first central plate 41, a tympanic membrane 42, a one-way air inlet valve plate 43, a one-way air outlet valve plate 44, a normal pressure air hole 45, and a pressing block 46;

[0062] Diaphragm positioning plate 5, air inlet hole 51, second normal pressure channel 52, pressure reduction microchannel 53, tapered hole 54, steel ball 55, side guide groove 56, clamping column 57, diaphragm installation groove 58, guide groove 59;

[0063] Airbag seat 6, airbag 61, valve seat 62, air outlet valve 63;

[0064] Motor 7, eccentric wheel 71, drive shaft 72, support frame 73;

[0065] Base 8;

[0066] The first air flow channel A, the second air flow channel B, the normal pressure chamber C, and the third air flow channel D. DETAILED DESCRIPTION

[0067] It should be noted that the directions or positional relationships indicated by "upper", "lower", "inner", "outer" and the like described herein are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0068] See also Figures 3 to 29As shown, the quick pressure relief valve assembly disclosed in the present invention is located in the gas outlet area of ​​the pump and installed in the gas path below the upper cover 1 of the pump, and includes a gas outlet diaphragm 4, a gas relief diaphragm 2 and a diaphragm pressing plate 3. The gas outlet diaphragm 4 forms a tympanic membrane 42, and the top of the tympanic membrane 42 has a first center piece 41, and the first center piece 41 corresponds to the pressure relief hole 11 of the upper cover 1. The diaphragm pressing plate 3 covers the tympanic membrane 42 of the gas outlet diaphragm 4, and the top of the diaphragm pressing plate 3 opens a center hole 31, and the first center piece 41 of the gas outlet diaphragm 4 is exposed from the center hole 31. The venting diaphragm 2 is fixed on the top of the diaphragm pressing plate 3. The venting diaphragm 2 has a second center piece 21 corresponding to the pressure relief hole 11 of the upper cover 1. The second center piece 21 passes through the center hole 31 of the diaphragm pressing plate 3 and corresponds to the first center piece 41 of the outlet diaphragm 4 (the two can fit together in a natural state, or leave a gap without fitting). The best way is that the lower surface of the second center piece 21 fits together with the upper surface of the first center piece 41, and the upper surface area of ​​the second center piece 21 is smaller than the lower surface area of ​​the first center piece 41. The venting diaphragm 2, the diaphragm pressing plate 3 and the tympanic membrane 42 form a normal pressure cavity C that is connected to the atmosphere.

[0069] The quick pressure relief valve assembly of the present invention is applied to an air pump, which can be Figure 17-19 , Figure 26-28 The structure shown can also be Figure 1-2 The existing structure shown can also be other air pump structures suitable for installing the quick pressure relief valve assembly of the present invention. Before the gas is pumped out from the upper cover 1, it first passes through the quick pressure relief valve assembly located in the gas outlet area of ​​the pump. When the air pump is powered on and starts to inflate, the air pressure difference (pressure difference) of the gas acting on the first center piece 41 and the second center piece 21 is small, but because the lower surface area of ​​the first center piece 41 is larger than the upper surface area of ​​the second center piece 21, the pressure acting on the upper surface of the second center piece 21 is significantly smaller than the pressure on the lower surface of the first center piece 41, that is, a large pressure difference can still be obtained on the first center piece 41 and the second center piece 21. Under the action of the pressure difference, the first center piece 41 quickly pushes the second center piece 21 upward, and the second center piece 21 quickly closes the pressure relief hole 11, so as to quickly block the pressure relief hole 11, and no leakage will occur when continuing to inflate, the inflation is more stable, and the inflation speed is increased. When inflation stops, the air pressure acting on the upper surface of the second center piece 21 is significantly greater than the air pressure acting on the lower surface of the first center piece 41, which is sufficient to separate the second center piece 21 from the pressure relief hole 11, and the gas is discharged from the pressure relief hole 11, thereby achieving the purpose of rapid pressure relief.

[0070] For the pressure analysis of the first center piece 41 and the second center piece 21, see Fig.29 As shown, the diameter of the first center piece 41 is D2, and the gas pressure it receives is P2. The diameter of the second center piece 21 is D1, and the gas pressure it receives is P1. Thus, the pressure difference between the first center piece 41 and the second center piece 21 is ΣF=π(P2*D22 -P1*D1 2 ) / 4, the present invention uses the pressure difference to achieve the closing of the pressure relief hole 11. Among them, the optimal value of D2 / D1 is 1.6, that is, the ratio of the lower surface area of ​​the first center piece 41 to the upper surface area of ​​the second center piece 21 is 1.6 2 , when P2-P1=2kPa, the pressure difference test list under different air pressures is as follows.

[0071]

[0072]

[0073] The method of realizing the communication between the normal pressure chamber C and the atmosphere of the present invention can be as shown in the figure, but is not limited to the structure shown in the figure. As shown in the figure, the outlet diaphragm 4 forms a normal pressure pore 45 outside the tympanic membrane 42 to communicate with the atmosphere. Correspondingly, the bottom of the diaphragm pressure plate 3 forms a first normal pressure channel 34 to communicate the normal pressure chamber C with the normal pressure pore 45, so that the normal pressure chamber C is connected to the atmosphere through the first normal pressure channel 34 and the normal pressure pore 45. The present invention can also use other structures to communicate the normal pressure chamber C with the atmosphere.

[0074] The optimized design of the present invention is: the bottom of the diaphragm pressing plate 3 forms a pressing edge 32, and the pressing edge 32 can be pressed more tightly on the outlet diaphragm 4 at the root of the tympanic membrane 42 to ensure the air tightness between the diaphragm pressing plate 3 and the outlet diaphragm 4. The top of the diaphragm pressing plate 3 forms an annular positioning groove 33, and the upper cover 1 forms an annular pressing wall 13 correspondingly. The annular pressing wall 13 is provided with a notch 14 for air flow to pass through near the air outlet 12 of the upper cover 1, and the periphery of the air-release diaphragm 2 forms an annular positioning strip 22 correspondingly. The annular positioning strip 22 of the air-release diaphragm 2 is arranged in the annular positioning groove 33 of the diaphragm pressing plate 3, and the annular pressing wall 13 of the upper cover 1 is pressed tightly on the annular positioning strip 22 of the air-release diaphragm 2, so that the air-release diaphragm 2 is fixed on the top of the diaphragm pressing plate 3 to ensure the air tightness between the diaphragm pressing plate 3 and the air-release diaphragm 2. In this way, it can be ensured that the normal pressure chamber C is separated from the second air flow channel B.

[0075] The integrated diaphragm pump structure of the present invention is the application of the quick pressure relief valve assembly. Since the quick pressure relief valve assembly is installed in the gas outlet area of ​​the pump, the specific structures of the gas outlet areas of different pumps are not completely the same. Accordingly, the assembly forms of the quick pressure relief valve assembly are not completely the same. Therefore, the applied diaphragm pump structure will also appear in various forms. Several specific embodiments are listed below for illustration, but the integrated diaphragm pump structure of the present invention is not limited to the following embodiments.

[0076] The integrated diaphragm pump structures of the first and second embodiments are as follows: Figure 17-19 and Figure 26-27As shown, there are motor 7, base 8, eccentric wheel 71, drive shaft 72, support frame 73, airbag 61, airbag seat 6, diaphragm positioning plate 5, the above-mentioned quick pressure relief valve assembly and upper cover 1. Motor 7 is installed on base 8, and airbag seat 6 is assembled on base 8. There can be two airbags 61, which are installed on airbag seat 6. The bottom of airbag 61 is connected to support frame 73. Motor 7 drives airbag 61 to move and inflate through eccentric wheel 71, drive shaft 72 and support frame 73. The structure of driving airbag 61 to inflate in the diaphragm pump structure is prior art, and the improvement is that diaphragm positioning plate 5, the above-mentioned quick pressure relief valve assembly and upper cover 1 are assembled on airbag seat 6 in sequence. An air inlet hole 51 is opened on the diaphragm positioning plate 5 corresponding to the tympanic membrane 4 of the air outlet diaphragm 4, and the air inlet hole 51 directly connects the tympanic membrane 42 with the airbag 61. A first airflow channel A is formed between the air outlet diaphragm 4 and the diaphragm positioning plate 5 and is connected to the tympanic membrane 42. A one-way air outlet valve plate 44 is provided at the outlet of the first airflow channel A. The first airflow channel A is connected to the atmosphere through a pressure-reducing microchannel 53. A second airflow channel B is formed between the air release diaphragm 2, the diaphragm pressure plate 3, the air outlet diaphragm 4, the one-way air outlet valve plate 44 and the upper cover 1. The second airflow channel B is connected to the air outlet hole 12 and the pressure relief hole 11 of the upper cover 1. Because the flow output requirement of this air pump is small, the output flow of a single airbag 61 can meet the requirement. Therefore, the air inlet hole 51 of the diaphragm positioning plate 5 can be directly connected to only one airbag 61, and the air outlet of the other airbag 61 is directly connected to the outside atmosphere through the guide groove 59 (or other channels) at the bottom of the diaphragm positioning plate 5. When the integrated diaphragm pumps of the first and second embodiments are working, the airflow is directly pumped from one airbag 61 through the air inlet 51 of the diaphragm positioning plate 5 and the quick pressure relief valve assembly, and then through the air outlet 12 of the upper cover 1. The air inlet and air outlet of the other airbag 61 are connected to the outside atmosphere. The purpose of using two airbags 61 is to ensure the force balance of the left and right airbags 61 when working.

[0077] The specific air path of the integrated diaphragm pump of the first and second embodiments is that the gas comes out from the air bag 61, passes through the air inlet hole 51 of the diaphragm positioning plate 5 and the one-way air inlet valve plate 43 of the air outlet diaphragm 4, enters the eardrum 42 of the air outlet diaphragm 4, and then passes through the first air flow channel A and the one-way air outlet valve plate 44 to enter the second air flow channel B. After entering the second air flow channel B, part of the gas is discharged from the air outlet hole 12 of the upper cover 1 for inflation, and the other part is discharged from the pressure relief hole 11. At this time, the air pressure in the second air flow channel B is less than or equal to The air pressure in the first airflow channel A and the eardrum 42 is less than that in the second center sheet 21, but the upper surface area of ​​the second center sheet 21 is smaller than the lower surface area of ​​the first center sheet 41, and the pressure acting on the upper surface of the second center sheet 21 is less than that on the lower surface of the first center sheet 41. Under the action of the pressure difference, the first center sheet 41 quickly pushes the second center sheet 21 upward, and the second center sheet 21 quickly closes the pressure relief hole 11. Then, all the gas in the second airflow channel B is discharged from the air outlet 12 of the upper cover 1, so as to achieve rapid and stable inflation. When inflation stops, the first airflow channel A is connected to the atmosphere through the pressure reduction microchannel 53 and the pressure is reduced to atmospheric pressure. The air pressure in the second airflow channel B is greater than the air pressure in the first airflow channel A and the eardrum 42, which is sufficient to disengage the second center sheet 21 from the pressure relief hole 11, and the gas in the second airflow channel B is discharged from the pressure relief hole 11, so as to achieve the purpose of rapid pressure relief.

[0078] The structure of the integrated diaphragm pump of the third embodiment is as follows: Fig.28As shown, it has a motor 7, a base 8, an eccentric wheel 71, a drive shaft 72, a support frame 73, an airbag 61, an airbag seat 6, a valve seat 62, an air outlet valve 63, a diaphragm positioning plate 5, the above-mentioned quick pressure relief valve assembly and an upper cover 1. The motor 7 is installed on the base 8, and the airbag seat 6 is assembled on the base 8. There can be two airbags 61, and the airbag 61 is installed on the airbag seat 6. The bottom of the airbag 61 is connected to the support frame 73. The motor 7 drives the airbag 61 to move and inflate through the eccentric wheel 71, the drive shaft 72 and the support frame 73. The improvement is that the valve seat 62, the diaphragm positioning plate 5, the above-mentioned quick pressure relief valve assembly and the upper cover 1 are assembled on the airbag seat 6 in sequence. The difference between the third embodiment and the first and second embodiments is that the valve seat 62 is assembled between the airbag seat 6 and the diaphragm positioning plate 5 of the airbag 61. An outlet valve 63 is installed on the valve seat 62 at a position corresponding to the airbag 61, and a third airflow channel D is formed between the valve seat 62 and the diaphragm positioning plate 5. An air inlet hole 51 is provided on the diaphragm positioning plate 5 corresponding to the eardrum 42 of the outlet diaphragm 4, and the air inlet hole 51 is connected to the third airflow channel D and the inside of the eardrum 42. The air inlet hole 51 indirectly connects the eardrum 42 with the airbag 61 through the third airflow channel D and the outlet valve 63. A first airflow channel A is formed between the outlet diaphragm 4 and the diaphragm positioning plate 5 and is connected to the inside of the eardrum 42. A one-way outlet valve plate 44 is provided at the outlet of the first airflow channel A. The first airflow channel A is connected to the atmosphere through the pressure-reducing microchannel 53. A second airflow channel B is formed between the deflation diaphragm 2, the diaphragm pressure plate 3, the outlet diaphragm 4, the one-way outlet valve plate 44 and the upper cover 1, and the second airflow channel B is connected to the air outlet hole 12 and the pressure relief hole 11 of the upper cover 1. When the integrated diaphragm pump of the third embodiment is working, the airflow comes out of the airbag 61, firstly gathers in the third airflow channel D, and then passes through the air inlet 51 of the diaphragm positioning plate 5 and the quick pressure relief valve assembly to pump air from the air outlet 12 of the upper cover 1. The air path after passing through the air inlet 51 is the same as that of the integrated diaphragm pumps of the first and second embodiments, and will not be described in detail here. Because the valve seat 62 and the air outlet valve 63 are added, the third embodiment is different from the second embodiment in this respect. Figure 1 and Figure 2 The prior art is similar to that shown in the figure. Therefore, the quick pressure relief valve assembly of the present invention is suitable for Figure 1 and Figure 2 An improvement of the existing diaphragm pump is shown.

[0079] In the integrated diaphragm pumps of embodiments one to three, a one-way air outlet valve sheet 44 is provided at the outlet of the first air flow channel A. The one-way air outlet valve sheet 44 can be integrally formed outside the tympanic membrane 42 of the air outlet diaphragm 4, and is in the shape of a small human head as shown in the figure, or it can be in the form of the one-way valve 400 of CN201510505369.2, or it can be separately formed from the air outlet diaphragm 4 to be an umbrella-shaped valve or other forms. In the integrated diaphragm pumps of embodiments one to three, a one-way air inlet valve sheet 43 can be provided on the air inlet hole 51 of the diaphragm positioning plate 5, and the one-way air inlet valve sheet 43 can be integrally formed inside and below the tympanic membrane 42 of the air outlet diaphragm 4, and is in the shape of a small human head as shown in the figure of the present invention, or it can be separately formed from the air outlet diaphragm 4 to be an umbrella-shaped valve or other forms, and of course it can also be as shown in the figure of the present invention. Figure 1 and Figure 2 As shown, the one-way air intake valve is not provided and the air intake hole 51 is left open.

[0080] In the integrated diaphragm pump, in order to realize the communication between the normal pressure chamber C and the atmosphere, as shown in Examples 1 and 2, the air outlet diaphragm 4 can form a normal pressure air hole 45 outside the eardrum 42, and correspondingly, a second normal pressure channel 52 is opened on the diaphragm positioning plate 5 to connect the normal pressure air hole 45 of the air outlet diaphragm 4 with the atmosphere, and a first normal pressure channel 34 is formed at the bottom of the diaphragm pressure plate 3 to connect the normal pressure chamber C and the normal pressure air hole 45, so that the normal pressure chamber C is connected to the atmosphere through the first normal pressure channel 34, the normal pressure air hole 45, and the second normal pressure channel 52.

[0081] The pressure reduction microchannel 53 of the present invention can be as shown in the figure, but is not limited to the structure shown in the figure. A pressure reduction microchannel 53 is formed between the air outlet diaphragm 4 and the diaphragm positioning plate 5 to connect the first airflow channel A with the atmosphere. The function of the pressure reduction microchannel 53 is that when the air pump is inflating, the micro-leakage generated is not enough to affect the inflation speed; when the air pump is powered off and stops inflating, the air pressure in the first airflow channel A continues to drop through the pressure reduction microchannel 53 until it drops to atmospheric pressure. In this way, the pressure in the second airflow channel B is much greater than the pressure in the first airflow channel A and the tympanic membrane 42, forming a pressure difference. The pressure difference causes the second center piece 21 to quickly push the first center piece 41 downward, and the second center piece 21 is separated from the pressure relief hole 11. The air pressure in the second airflow channel B is discharged from the pressure relief hole 11, thereby accelerating the pressure relief. Specifically, it can be as follows Fig.12 As shown in FIG. 5 , the upper surface of the diaphragm positioning plate 5 is recessed to form a pressure-reducing microchannel 53. Alternatively, as shown in FIG. Figure 22-24 As shown in the figure, a tapered hole 54 with a larger top and a smaller bottom is formed on the diaphragm positioning plate 5, a steel ball 55 is loaded into the tapered hole 54, the upper end of the tapered hole 54 is connected to the first air flow channel A, and the lower end of the tapered hole 54 is connected to the side guide groove 56 on the lower surface of the diaphragm positioning plate 5, and the side guide groove 56 is connected to the atmosphere. The tapered hole 54, the gap between the tapered hole 54 and the steel ball 55, and the side guide groove 56 constitute a pressure reduction microchannel instead of Fig.12In the decompression microchannel 53 shown, the lower surface of the outlet diaphragm 4 corresponds to the tapered hole 54 of the diaphragm positioning plate 5 to form a pressing block 46, and the pressing block 46 presses on the steel ball 55 to assemble and position the steel ball 55. Because the gap between the tapered hole 54 and the steel ball 55 can be adjusted by the surface roughness, the cross-sectional area of ​​the channel can be controlled and can be made small enough. In fact, the ventilation volume is easy to adjust and control, and the decompression speed can also be controlled. Of course, the present invention can also use a decompression microchannel 53 with other structures to connect the first airflow channel A to the atmosphere.

[0082] The structure of the first air flow channel A formed in the present invention can be as shown in the figure, but is not limited to the structure shown in the figure. The first air flow channel A between the air outlet diaphragm 4 and the diaphragm positioning plate 5 is formed by a depression on the upper surface of the diaphragm positioning plate 5, and one end of the first air flow channel A is located below the eardrum 42 and the other end is located below the outside of the eardrum 42.

[0083] Optimally, the assembly structure of the diaphragm positioning plate 5 and the upper cover 1 of the present invention can be specifically as shown in the figure but is not limited to the structure shown in the figure, and a mutually matching clamping column 57 and a clamping groove 15 are formed between the diaphragm positioning plate 5 and the upper cover 1, and the diaphragm positioning plate 5 and the upper cover 1 are positioned and assembled together with the help of the clamping column 57 and the clamping groove 15. When actually used in a pump, the upper cover 1, the diaphragm positioning plate 5 and other components can be positioned and assembled together with the help of long screws.

[0084] Optimally, the bottom surface of the upper cover 1 of the present invention also forms a pressure relief boss 16 at the edge of the pressure relief hole 12, and the pressure relief boss 16 and the second center piece 21 are closely fitted during the inflation process to achieve the shutoff function. The upper cover 1 can also be provided with an anti-fool block 17, Fig.15 and Fig.25 The position of the foolproof block 17 shown is slightly different. The foolproof block 17 can facilitate the assembly between the upper cover 1 and other components such as the air outlet diaphragm 4, the air release diaphragm 2 and the diaphragm pressure plate 3.

[0085] Optimally, a diaphragm mounting groove 58 is formed on the upper surface of the diaphragm positioning plate 5 of the present invention, and the air outlet diaphragm 4 is arranged in the diaphragm mounting groove 58. The lower surface of the upper cover 1 forms a pressing edge 18 corresponding to the edge of the air outlet diaphragm 4. The air outlet diaphragm 4 is positioned and assembled in the diaphragm mounting groove 58 by means of the pressing fit between the pressing edge 18 and the edge of the air outlet diaphragm 4. This structure can better ensure the fit between the air outlet diaphragm 4 and the diaphragm positioning plate 5, and ensure the effectiveness of the first airflow channel A, the one-way air inlet valve plate 43, the one-way air outlet valve plate 44, and the pressure reduction microchannel 53.

[0086] The above description is only a specific embodiment of the present invention and is not intended to limit the protection scope of the present invention. It should be noted that equivalent changes made by those skilled in the art based on the design ideas of this case after reading this specification all fall within the protection scope of this case.

Claims

1. A quick pressure relief valve assembly, characterized in that: It is installed in the air path below the upper cover of the pump, and includes an air outlet diaphragm, an air relief diaphragm and a diaphragm pressing plate; the air outlet diaphragm forms a tympanic membrane, and the top of the tympanic membrane has a first center piece for corresponding to the pressure relief hole of the upper cover; the diaphragm pressing plate covers the tympanic membrane of the air outlet diaphragm, and the top of the diaphragm pressing plate is provided with a center hole for exposing the first center piece; the air relief diaphragm is fixed on the top of the diaphragm pressing plate, and the air relief diaphragm has a second center piece for corresponding to the pressure relief hole of the upper cover, and the second center piece corresponds to the first center piece through the center hole of the diaphragm pressing plate, and the upper surface area of ​​the second center piece is smaller than the lower surface area of ​​the first center piece, and a normal pressure cavity is formed between the air relief diaphragm, the diaphragm pressing plate and the tympanic membrane and is connected to the atmosphere.

2. The quick pressure relief valve assembly according to claim 1, characterized in that: The first center piece and the second center piece are attached together or not attached together in a natural state.

3. The quick pressure relief valve assembly according to claim 1, characterized in that: The air outlet diaphragm forms a normal pressure pore outside the eardrum to communicate with the atmosphere, and the bottom of the diaphragm pressure plate forms a first normal pressure channel to connect the normal pressure cavity and the normal pressure pore, so that the normal pressure cavity is connected to the atmosphere through the first normal pressure channel and the normal pressure pore.

4. The quick pressure relief valve assembly according to claim 1, characterized in that: The bottom of the diaphragm pressing plate forms a pressing edge, which is pressed tightly on the air outlet diaphragm at the root of the eardrum.

5. The quick pressure relief valve assembly according to claim 1, characterized in that: An annular positioning groove is formed on the top of the diaphragm pressing plate, corresponding to the annular pressure wall in the upper cover; a notch is provided on the annular pressure wall near the air outlet of the upper cover for air flow to pass through; an annular positioning strip is correspondingly formed around the periphery of the air-deflating diaphragm; the annular positioning strip of the air-deflating diaphragm is arranged in the annular positioning groove of the diaphragm pressing plate; the annular pressure wall of the upper cover is pressed tightly against the annular positioning strip of the air-deflating diaphragm, so that the air-deflating diaphragm is fixed on the top of the diaphragm pressing plate.

6. The quick pressure relief valve assembly according to claim 1, characterized in that: The air outlet diaphragm forms a one-way air outlet valve sheet outside the eardrum.

7. Integrated diaphragm pump, characterized by: A diaphragm positioning plate, a quick pressure relief valve assembly as described in claim 1 and an upper cover are assembled in sequence on the airbag seat of the airbag; an air inlet hole is provided on the diaphragm positioning plate corresponding to the eardrum of the air outlet diaphragm in the above-mentioned quick pressure relief valve assembly, and the air inlet hole directly or indirectly connects the eardrum with the airbag; a first air flow channel is formed between the air outlet diaphragm and the diaphragm positioning plate and connected to the eardrum, a one-way air outlet valve sheet is provided on the outlet of the first air flow channel, and the first air flow channel is connected to the atmosphere through a pressure reducing microchannel; a second air flow channel is formed between the air relief diaphragm, the diaphragm pressure plate, the air outlet diaphragm, the one-way air outlet valve sheet and the upper cover to connect the air outlet hole and the pressure relief hole of the upper cover.

8. The integrated diaphragm pump according to claim 7, characterized in that: There are two airbags, and the air inlet hole of the diaphragm positioning plate is directly or indirectly connected to one airbag, and the air outlet of the other airbag is directly connected to the outside atmosphere; or, a valve seat is assembled between the airbag seat and the diaphragm positioning plate of the airbag, and an air outlet valve is installed on the valve seat at a position corresponding to the airbag, and a third airflow channel is formed between the valve seat and the diaphragm positioning plate, and the air inlet hole of the diaphragm positioning plate is connected to the third airflow channel and the inside of the eardrum, and the eardrum is indirectly connected to the airbag through the air inlet hole of the diaphragm positioning plate, the third airflow channel and the valve seat.

9. The integrated diaphragm pump according to claim 7, characterized in that: The one-way air outlet valve sheet is an umbrella-shaped valve, or the one-way air outlet valve sheet is integrally formed outside the eardrum of the air outlet diaphragm.

10. The integrated diaphragm pump according to claim 7, characterized in that: A one-way air intake valve is provided on the air intake hole of the diaphragm positioning plate; the one-way air intake valve is an umbrella-shaped valve, or the one-way air intake valve is integrally formed inside and below the tympanic membrane of the air outlet diaphragm.

11. The integrated diaphragm pump according to claim 7, characterized in that: The air outlet diaphragm forms a normal-pressure air hole outside the eardrum, and a second normal-pressure channel is opened on the diaphragm positioning plate to connect the normal-pressure air hole of the air outlet diaphragm with the atmosphere. A first normal-pressure channel is formed at the bottom of the diaphragm pressure plate to connect the normal-pressure cavity and the normal-pressure air hole, so that the normal-pressure cavity is connected to the atmosphere through the first normal-pressure channel, the normal-pressure air hole, and the second normal-pressure channel.

12. The integrated diaphragm pump according to claim 7, characterized in that: A pressure reduction microchannel is formed between the air outlet diaphragm and the diaphragm positioning plate to connect the first air flow channel with the atmosphere.

13. The integrated diaphragm pump according to claim 12, characterized in that: A pressure-reducing microchannel is formed by a depression on the upper surface of the diaphragm positioning plate; or, a conical hole which is larger at the top and smaller at the bottom is formed on the diaphragm positioning plate, a steel ball is loaded into the conical hole, the upper end of the conical hole is connected to the first air flow channel, the lower end of the conical hole is connected to the side guide groove on the lower surface of the diaphragm positioning plate, the side guide groove is connected to the atmosphere, the conical hole, the gap between the conical hole and the steel ball, and the side guide groove constitute the pressure-reducing microchannel, the lower surface of the air outlet diaphragm corresponds to the conical hole of the diaphragm positioning plate to form a pressing block, and the pressing block is pressed on the steel ball to position the steel ball.

14. The integrated diaphragm pump according to claim 7, characterized in that: The first air flow channel between the air outlet diaphragm and the diaphragm positioning plate is formed by a depression on the upper surface of the diaphragm positioning plate. One end of the first air flow channel is located below the eardrum and the other end is located below the eardrum.

15. The integrated diaphragm pump according to claim 7, characterized in that: A diaphragm mounting groove is formed on the upper surface of the diaphragm positioning plate, and the air outlet diaphragm is arranged in the diaphragm mounting groove. A pressing edge is formed on the lower surface of the upper cover corresponding to the edge of the air outlet diaphragm. The air outlet diaphragm is positioned and assembled in the diaphragm mounting groove by means of the tight fit between the pressing edge and the edge of the air outlet diaphragm.

16. The integrated diaphragm pump according to claim 7, characterized in that: A clamping column and a clamping groove which cooperate with each other are formed between the diaphragm positioning plate and the upper cover, and the diaphragm positioning plate and the upper cover are positioned and assembled together by means of the clamping column and the clamping groove.

17. The integrated diaphragm pump according to claim 7, characterized in that: The upper cover forms a pressure relief boss at the edge of the pressure relief hole.

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