CN216922442U - Valve plate assembly, pump body device and diaphragm pump - Google Patents

Abstract

The embodiment of the utility model relates to a gas-liquid conveying device, in particular to a valve plate assembly, a pump body device and a diaphragm pump; the valve plate assembly includes: a plate pack and an outlet seal; the plate group is provided with a first mounting side and a second mounting side along a preset linear direction, the plate group is provided with a suction channel which can be passed by a gas medium or a liquid medium, and the suction channel is provided with a first inlet exposed to the first mounting side and a first outlet exposed to the second mounting side; the outlet seal is arranged at the second mounting side of the plate package; the outlet sealing pieces are movable along a preset linear direction and are used for opening or closing a first outlet of the suction channel; the first outlet and the first inlet of the suction channel are arranged in a staggered mode. Compared with the prior art, can also reduce the produced noise of diaphragm pump during operation when not influencing gaseous medium or liquid medium trafficability characteristic, and then improve user's use impression.

Description

Valve plate assembly, pump body device and diaphragm pump

Technical Field

The embodiment of the utility model relates to a gas-liquid conveying device of a hand washing machine, in particular to a valve plate assembly, a pump body device and a diaphragm pump.

Background

The hand sanitizer is a washing device frequently used in daily life of people and is usually placed in a kitchen, a toilet and the like. The cleaning composition is typically stored in a container that is pressed out by pressing a pressing device provided at the top of the container. In washing hands, the pressed liquid soap is usually applied to the part to be washed, the two parts are repeatedly kneaded until the liquid soap foams, and then the liquid soap is washed clean by tap water.

The diaphragm pump, which is also called a control pump as a device for generating foam in the hand washing machine, is operated by power to change the flow of fluid by receiving a control signal output by a regulating control unit of the hand washing machine. Diaphragm pumps are known as positive displacement pumps which rely primarily on the back and forth movement of a diaphragm to change the volume of a chamber to draw in and expel a liquid or gas. Generally, the diaphragm pump comprises a transmission part, a compression part and a conveying part, wherein the transmission part is a driving mechanism for driving a diaphragm to swing back and forth, and the transmission form of the driving mechanism comprises mechanical transmission, hydraulic transmission, pneumatic transmission and the like; the compression part mainly comprises a diaphragm drive and a diaphragm, and the suction and the discharge of liquid and/or gas are realized through the reciprocating movement of the diaphragm on the diaphragm.

In the process of sucking the medium by the diaphragm pump, the diaphragm is required to be blown in one direction by the aid of the diaphragm, so that negative pressure is generated on the sealing element arranged on the outlet side of the liquid inlet channel or the gas inlet channel by the diaphragm, the sealing element can leave the outlet side of the liquid inlet channel or the gas inlet channel under the negative pressure, the outlet side can be opened by the sealing element, and the liquid inlet channel or the gas inlet channel can suck the liquid medium or the gas medium. However, the inventor finds that, in the process of sucking the medium in the liquid inlet channel or the air inlet channel, due to the influence of the negative pressure of the medium, the flow speed of the medium entering the liquid inlet channel or the air inlet channel is generally fast, and the impulse force is large, so that the medium often directly impacts the sealing member in the process of passing through the liquid inlet channel or the air inlet channel, and the diaphragm pump generates large noise due to the impact when in work, thereby affecting the use feeling of a user.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to design a valve plate assembly, a pump body device and a diaphragm pump, which can effectively reduce the noise generated by the diaphragm pump during working.

In order to achieve the above object, an embodiment of the present invention provides a valve plate assembly, characterized by comprising:

the plate group is provided with a first mounting side and a second mounting side opposite to the first mounting side along a preset linear direction; the plate pack is provided with at least one suction channel through which a gaseous or liquid medium can pass, the suction channel having a first inlet exposed to the first mounting side, a first outlet exposed to the second mounting side;

at least one outlet seal provided at the second mounting side of the plate pack; the number of the outlet sealing pieces is the same as that of the suction channels and only corresponds to that of the suction channels; each outlet seal is movable relative to the plate pack for opening or closing the first outlet of a single correspondingly arranged suction channel;

wherein the first outlet of the suction passage is staggered from the first inlet.

In addition, an embodiment of the present invention also provides a pump body device, including:

a valve plate assembly as described above;

a pressure assembly for applying a positive or negative pressure to the outlet seal;

wherein the outlet seal opens the first outlet of the suction channel when the pressure assembly applies a negative pressure to the outlet seal; the outlet seal closes the first outlet of the suction passage when the pressure assembly applies a positive pressure to the outlet seal.

In addition, an embodiment of the present invention also provides a diaphragm pump, including:

the pump body device as described above;

and the driving component is connected with the pressure component and is used for driving the pressure component to enable the pressure component to generate positive pressure or negative pressure.

Compared with the prior art, the embodiment of the utility model has the advantages that the first inlet and the first outlet of the suction channel of the plate group are arranged in a staggered manner, so that the length of the suction channel is prolonged, the speed of a liquid medium or a gas medium passing through the suction channel is effectively reduced, and when the liquid medium or the gas medium enters the suction channel, the impact force on the outlet sealing member caused by the liquid medium or the gas medium passing through the suction channel is reduced due to the reduction of the flow speed of the medium, so that the noise generated by the diaphragm pump during working can be reduced while the passing property of the gas medium or the liquid medium is not influenced, and the use feeling of a user is improved.

Additionally, the valve plate assembly further comprises:

a support plate disposed at the second mounting side of the plate pack; the supporting plate is provided with at least one first through hole which can be passed through by gas medium or liquid medium, the number of the first through holes is the same as that of the suction channels, the first through holes are arranged only correspondingly, and each first through hole is communicated with the suction channel which is arranged only correspondingly;

and one outlet sealing element is arranged in each first through hole, and each outlet sealing element is elastically connected with the supporting plate.

Further, the plate pack comprises: the bottom plate is opposite to the supporting plate, and the middle plate is arranged between the bottom plate and the supporting plate;

wherein the suction passage includes: the first channel is arranged on the bottom plate, the second channel is arranged on the middle plate, and the third channel is communicated with the first channel and the second channel, one side, far away from the middle plate, of the first channel is the first inlet, and one side, far away from the bottom plate, of the second channel is the first outlet.

In addition, the first passage is formed by the first inlet extending vertically in the direction of the middle plate, and the second passage is formed by the first outlet extending vertically in the direction of the bottom plate;

the third passage is provided on a side of the bottom plate opposite to the middle plate or on a side of the middle plate opposite to the bottom plate, the third passage has a medium entrance end communicating with the first passage and a medium exit end communicating with the second passage, and the medium entrance end and the medium exit end are disposed opposite to each other.

In addition, the third passages are perpendicular to the first and second passages, respectively.

In addition, a medium guide groove is formed in a side of the bottom plate away from the middle plate, the medium guide groove is communicated with the first inlet of at least one first passage, and the valve plate assembly further comprises:

the medium guide plate is arranged on one side of the bottom plate, which is far away from the middle plate; the medium guide plate is provided with a medium inlet hole along the preset straight line direction, and the medium inlet hole is communicated with any part of the medium guide groove.

In addition, the suction passage is provided with a plurality of suction passages, at least one suction passage is an air inlet passage for gas medium to pass through, and at least one suction passage is an inlet passage for liquid medium to pass through.

The plate package is further provided with at least one discharge channel through which a gaseous or liquid medium can pass, the discharge channel having a second inlet exposed to the second mounting side, a second outlet exposed to the first mounting side;

the valve plate assembly further includes: at least one inlet seal arranged at the second mounting side of the plate pack, the number of inlet seals being the same as the number of discharge channels and being arranged exclusively in correspondence; each inlet seal is movable relative to the plate pack for opening or closing the second inlet of a single correspondingly arranged discharge channel;

wherein the pressure assembly is further configured to apply a positive or negative pressure to the inlet seal, the inlet seal closing the second inlet of the discharge passage when the pressure assembly applies a negative pressure to the inlet seal; the inlet seal opens the second outlet of the discharge passage when the pressure assembly applies a positive pressure to the outlet seal.

Additionally, the pressure assembly includes:

at least one bladder for applying a positive pressure or a negative pressure to at least one of said outlet seals and at least one of said inlet seals, said bladder further being adapted to squeeze or stretch in said pre-set linear direction;

wherein the bladder is for applying a negative pressure to the outlet seal and the inlet seal, respectively, when stretched, and for applying a negative pressure when squeezed;

the bladder is further adapted to apply a positive pressure to the outlet seal and the inlet seal, respectively, upon squeezing.

Drawings

FIG. 1 is a schematic view of the assembly of a valve plate assembly when a third passageway is provided in a base plate according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the valve plate assembly when the third passageway is formed in the middle plate according to the first embodiment of the present invention;

FIG. 3 is a schematic view of a side of the bottom plate away from the middle plate according to the first embodiment of the present invention;

FIG. 4 is a schematic view showing a medium introducing plate provided on a side of a bottom plate away from an intermediate plate according to a first embodiment of the present invention;

FIG. 5 is a schematic view of a support plate coupled to an inlet seal and an outlet seal, respectively, in a second embodiment of the present invention;

FIG. 6 is a schematic view of a valve plate assembly with the addition of a valve plate according to a second embodiment of the present invention;

fig. 7 is a schematic view of a side of the bottom plate opposite to the middle plate in the second embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view of FIG. 7;

FIG. 9 is a pump body assembly according to a second embodiment of the present invention;

fig. 10 is a schematic axial view of a diaphragm pump according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

Example one

A first embodiment of the present invention relates to a valve plate assembly 1, as shown in fig. 1 and 2, including: a plate pack 11 and at least one outlet seal 12.

Wherein, as shown in fig. 1, the plate pack 11 has a first mounting side 111 and a second mounting side 112 opposite to the first mounting side 111 along a predetermined linear direction, and the plate pack 11 is provided with at least one suction channel 113 through which a gaseous medium or a liquid medium can pass, the suction channel 113 having a first inlet 1131 exposed to the first mounting side 111 and a first outlet 1132 exposed to the second mounting side 112.

In addition, in the present embodiment, as shown in fig. 1 and 2, each outlet seal 12 is provided on the second mounting side 112 of the plate group 11, and the number of the outlet seals 12 is the same as and corresponds one-to-one to the number of the suction passages 113. Each outlet seal 12 is movable relative to the plate package for opening or closing a first outlet 1132 of a single correspondingly arranged suction channel 113. Also, as shown in fig. 1 and 2, the first outlet 1132 of each suction passage 113 is disposed to be offset from the first inlet 1131.

As can be seen from the above, since the first inlet 1131 and the first outlet 1132 of the suction channel 113 of the plate set 11 are staggered, the length of the suction channel 113 is extended, so as to effectively slow down the speed of the liquid medium or the gaseous medium when passing through the suction channel 113, and when the liquid medium or the gaseous medium enters the suction channel 113, due to the reduction of the medium flow rate, the impact force on the outlet sealing member 12 when the liquid medium or the gaseous medium passes through the suction channel 113 is reduced, therefore, the noise generated during the operation of the diaphragm pump can be reduced while the passing performance of the gaseous medium or the liquid medium is not affected, and the use experience of the user is improved.

Specifically, in the present embodiment, as shown in fig. 1 and 2, the valve plate assembly 1 of the present embodiment further includes: a support plate 13, the support plate 13 being arranged at the second mounting side 112 of the plate package 11, while the support plate 13 is provided with at least one first through hole 131 through which a gaseous medium or a liquid medium can pass, and the first through holes 131 are in the same number as the suction channels 113 and are arranged uniquely corresponding thereto, each first through hole 131 communicating with a uniquely correspondingly arranged suction channel 113. Meanwhile, one outlet seal 12 is provided in each of the first passing holes 131, and each of the outlet seals 12 is elastically connected to the support plate 13.

It will thus be seen that by providing the support plate 13 at the second mounting side 112 of the plate package 11 and, at the same time, providing the support plate 13 with a plurality of first through holes 131 which are in communication with the respective suction channels 113, respectively, an elastic connection of the outlet seal 12 to the support plate 13 can be achieved through the respective first through holes 131, so that the respective outlet seal 12 is movable relative to the plate package. For example, in some embodiments, the outlet seal 12 is a resilient plate, and each resilient plate can receive a positive or negative pressure applied by the pressure assembly of the diaphragm pump when in use, and can move toward the second mounting side 112 when under the positive pressure applied by the pressure assembly, such that the resilient plate can close the first outlet 1132 of the suction channel 113, and can move away from the second mounting side 112 when under the negative pressure applied by the pressure assembly, such that the resilient plate can open the first outlet 1132 of the suction channel 113. In the present embodiment, the outlet seal 12 is described by taking only an elastic piece as an example, but other elastic members may be used for the outlet seal 12 in actual use, and the type of the outlet seal 12 is not particularly limited in the present embodiment. Furthermore, it should be noted that, when the outlet seal 12 is provided, the outlet seal 12 may be provided at a side of the first passing hole 131 opposite to the plate group 11, so that the outlet seal 12 is firmly attached to the plate group 11 when the outlet seal is subjected to a positive pressure, thereby ensuring the sealing performance of the first outlet 1132 of the suction passage 113 at this time.

Note that, in the present embodiment, as shown in fig. 1 and 2, the plate group 11 includes: a bottom plate 114 opposed to the support plate 13, and an intermediate plate 115 disposed between the bottom plate 114 and the support plate 13. In addition, the suction passage 113 includes: the first channel 1133 is disposed on the bottom plate 114, the second channel 1134 is disposed on the middle plate 115, and the third channel 1135 is used to connect the first channel 1133 and the second channel 1134, wherein the side of the first channel 1133 away from the middle plate 115 is a first inlet 1131, and the side of the second channel 1134 away from the bottom plate 114 is a first outlet 1132.

In order to offset the first outlet 1132 from the first inlet 1131, as shown in fig. 1 and 2, the first passage 1133 is formed by the first inlet 1131 extending vertically in the direction of the middle plate 115, the second passage 1134 is formed by the first outlet 1132 extending vertically in the direction of the bottom plate 114, and the third passage 1135 is provided on the side of the bottom plate 114 opposite to the middle plate 115. Meanwhile, the third passage 1135 has a medium entrance end 11351 communicating with the first passage 1133, a medium exit end 11352 communicating with the second passage 1134, and the medium entrance end 11351 and the medium exit end 11352 are disposed opposite to each other. It is therefore apparent that the first passages 1133 and the second passages 1134 may be staggered from each other by the third passages 1135, so that the first inlets 1131 and the first outlets 1132 may be staggered on the plate group 11, and therefore, after the gaseous medium or the liquid medium is sucked into the first passages 1133 from the first inlets 1131, as shown in fig. 1 and fig. 2, the resistance of the liquid medium or the gaseous medium during flowing may be increased by the third passages 1135, so as to reduce the flow velocity of the liquid medium or the gaseous medium during passing through the second passages 1134, and further reduce the impact force of the liquid medium or the gaseous medium on the outlet seals 12, so that the noise of the working pump during working may be reduced.

Preferably, when the third channel 1135 is provided, the third channel 1135 is perpendicular to the first channel 1133 and the second channel 1134, that is, the third channel 1135 is formed by extending from the medium inlet end 11351 to the medium outlet end 11352 in the horizontal direction, so that when the liquid medium or the gas medium enters the third channel 1135 from the first channel 1133, the flow resistance of the liquid medium or the gas medium passing through the third channel 1135 can be further increased. In addition, although the third passage 1135 is provided only on the side of the bottom plate 114 with respect to the intermediate plate 115 in the present embodiment, in actual use, the third passage 1135 may be provided on the side of the intermediate plate 115 with respect to the bottom plate 114 as shown in fig. 2, and the position where the third passage 1135 is provided is not particularly limited in the present embodiment.

Meanwhile, when the suction passages 113 in the present embodiment are provided in plural, in some embodiments, at least one of the suction passages 113 may be used as a gas inlet passage for passing a gaseous medium, and at least another one of the suction passages 113 may be used as a liquid inlet passage for passing a liquid medium, so that the valve plate assembly 1 of the present embodiment can simultaneously realize the transportation of the gaseous medium and the liquid medium.

In addition, it should be noted that, in the present embodiment, as shown in fig. 3, a medium guide groove 1141 is provided on a side of the bottom plate 114 away from the intermediate plate 115, and the medium guide groove 1141 communicates with the first inlet 1131 of the at least one first passage 1133. As shown in fig. 4, the valve plate assembly 1 of the present embodiment further includes: the medium guide plate 14 is disposed on one side of the bottom plate 114 away from the middle plate 115, the medium guide plate 14 is disposed with medium inlet holes 141 along a predetermined linear direction, the medium inlet holes 141 are communicated with any part of the medium guide groove 1141, and the supplied liquid medium or gas medium can be divided by the cooperation of the medium inlet holes 141 and the medium guide groove 1141, so as to meet the supply requirement of the liquid medium and the gas medium when the valve plate assembly 1 has a plurality of suction channels 113.

Example two

A second embodiment of the present invention relates to a pump body device, as shown in fig. 9, including: the valve plate assembly 1 according to the first embodiment, further comprising: a pressure assembly 2. Also, as shown in connection with FIG. 5, the pressure assembly 2 is used to apply either a positive or negative pressure to the outlet seal 12. In actual use, when the pressure assembly 2 applies a negative pressure to the outlet seal 12, the outlet seal 12 opens the first outlet 1132 of the suction channel 113. And when the pressure assembly 2 applies a positive pressure to the outlet seal 12, the outlet seal 12 closes the first outlet 1132 of the suction passage 113.

Further, as a preferable mode, as shown in fig. 7, in the present embodiment, the plate group 11 of the valve plate assembly 1 is further provided with at least one discharge passage 116 through which a gaseous medium or a liquid medium can pass, and, as shown in connection with fig. 8, the discharge passage 116 has a second inlet 1161 exposed to the second mounting side 112, and a second outlet 1162 exposed to the first mounting side 111. It is thus clear that, by providing the outlet channel 116 in the plate package 11, the liquid medium and the gaseous medium, after passing through the intake channel 113 of the plate package 11, can be pumped out again under the positive pressure of the pressure assembly 2 from the second inlet 1161 into the outlet channel 116, and finally the liquid medium or the gaseous medium can be transported through the outlet channel 116.

Meanwhile, in order to be able to open or close the second inlet 1161 of the discharge passage 116, in the present embodiment, as shown in fig. 5, 7 and 8, the valve plate assembly 1 further includes: at least one inlet seal 15 provided at the second mounting side 112 of the plate package 11, and the number of inlet seals 15 is the same as the number of discharge channels 116 and is provided exclusively correspondingly, each inlet seal 15 is movable relative to the plate package 1 for opening or closing the second inlet 1161 of the discharge channel 116 provided exclusively correspondingly. Also, in practice, the pressure assembly 2 is also used to apply a positive or negative pressure to the inlet seal 15, with the inlet seal 15 closing the second inlet 1161 of the exhaust passageway 116 when the pressure assembly 2 applies a negative pressure to the inlet seal 15 and the inlet seal 15 opening the second inlet 1161 of the exhaust passageway 116 when the pressure assembly 2 applies a positive pressure to the outlet seal 15. In order to enable the inlet seals 15 to be able to close and open the second inlets 1161 under positive and negative pressures, as shown in fig. 5, the support plate 13 is provided with a second through hole 132 corresponding to each second inlet 1161, and one inlet seal 15 is provided in each second through hole 132, and at the same time, each inlet seal 15 is also elastically connected to the support plate 13, so that each inlet seal 15 is movable relative to the plate pack 1, and, as shown in fig. 6, the valve plate assembly 1 further includes: and a valve plate 16 disposed on a side of the support plate 13 remote from the intermediate plate, the valve plate 16 being provided with a liquid outlet hole 161 corresponding to each first through hole 131 and a liquid inlet hole 162 corresponding to each second through hole 132 and communicating with each second through hole 132, respectively, and the inlet seal 15 is disposed on a side of the second through hole 132 opposite to the valve plate 16 as much as possible when the inlet seal 15 is disposed, so that the inlet seal 15 can be pushed open when receiving a positive pressure from the pressure assembly 2 to open the second inlet 1161 of the discharge passage 116, and the seal 15 can be pushed against the valve plate 16 to close the second inlet 1161 of the discharge passage 116 when receiving a negative pressure.

Further, it is worth mentioning that, in order to enable the pressure assembly 2 to have a positive or negative pressure, respectively, towards the outlet seal 12 and the inlet seal 15, as shown in fig. 6, 7 and 9, the pressure assembly 2 in the present embodiment comprises: at least one capsule 21, and the capsule 21 is disposed on a side of the valve plate 16 away from the support plate 13 and covers at least one liquid outlet hole 161 and liquid inlet hole 162 at the same time, so that the capsule 21 can apply positive pressure or negative pressure to the outlet seal 12 and the inlet seal 15 through the liquid outlet hole 161 and liquid inlet hole 162 at the same time, respectively, and in addition, the capsule 21 is also used for pressing or stretching in a predetermined linear direction. And, when the capsule 21 is stretched, the capsule 21 may apply a negative pressure to the outlet seal 12 through the liquid outlet holes 161, and simultaneously apply a negative pressure through the liquid inlet holes 16 and the inlet seal 15, so that the gas or liquid medium at this time may be sucked into the capsule 21 through the suction channel 113. When capsule 21 is being squeezed, capsule 21 may apply a positive pressure to outlet seal 12 via exit openings 161 and simultaneously to inlet seal 15 via inlet openings 16, so that the now gaseous or liquid medium may be pumped out via discharge channel 116.

EXAMPLE III

A third embodiment of the present invention relates to a diaphragm pump, as shown in fig. 10, including: the pump body arrangement and drive assembly 3 according to the second embodiment. Wherein, the driving component 3 is connected with the pressure component 2 and used for driving the pressure component to enable the pressure component to generate positive pressure or negative pressure.

Specifically, in the present embodiment, as shown in fig. 10, the drive unit 3 includes: the balance wheel 31, the motor 32, an eccentric wheel 33 connected with a main shaft of the motor 32, and a transmission shaft 34 connected with the eccentric wheel 33, wherein the motor 32 can drive the eccentric wheel 34 to rotate through the main shaft, and further drive the transmission shaft 34 to perform circular motion around the axial direction of the main shaft of the motor 32. In addition, balance 31 includes: a balance body 311, a swing arm 312 connected to the balance body 311, the swing arm 312 is also connected to the capsule 21, and a drive shaft 34 is inserted obliquely to the top of the balance body 311. Therefore, when the transmission shaft 34 performs a circular motion in the axial direction around the main shaft of the motor 32, the balance body 311 may oscillate along a predetermined arc track under the circular motion of the transmission shaft 34, so that the swing arm 312 may press and stretch the capsule 21 under the oscillation of the balance body 311, so that the capsule 21 may apply a positive pressure or a negative pressure to the outlet seal 12 and the inlet seal 15, thereby achieving suction and pumping of the gas medium or the liquid medium by the valve plate assembly 1.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.

Claims (10)

1. A valve plate assembly, comprising:

the plate group is provided with a first mounting side and a second mounting side opposite to the first mounting side along a preset linear direction; the plate pack is provided with at least one suction channel through which a gaseous or liquid medium can pass, the suction channel having a first inlet exposed to the first mounting side, a first outlet exposed to the second mounting side;

at least one outlet seal provided at the second mounting side of the plate pack; the number of the outlet sealing pieces is the same as that of the suction channels and corresponds to that of the suction channels one by one; each outlet seal is movable relative to the plate pack for opening or closing the first outlet of a single correspondingly arranged suction channel;

wherein the first outlet of the suction passage is staggered from the first inlet.

2. The valve plate assembly of claim 1, further comprising:

a support plate disposed at the second mounting side of the plate pack; the supporting plate is provided with at least one first through hole which can be passed through by gas medium or liquid medium, the number of the first through holes is the same as that of the suction channels, the first through holes are arranged only correspondingly, and each first through hole is communicated with the suction channel which is arranged only correspondingly;

and each outlet sealing piece is arranged in each first through hole and is elastically connected with the supporting plate.

3. The valve plate assembly of claim 2, wherein the plate pack comprises: the bottom plate is opposite to the supporting plate, and the middle plate is arranged between the bottom plate and the supporting plate;

wherein the suction passage includes: the first channel is arranged on the bottom plate, the second channel is arranged on the middle plate, and the third channel is communicated with the first channel and the second channel, one side, far away from the middle plate, of the first channel is the first inlet, and one side, far away from the bottom plate, of the second channel is the first outlet.

4. The valve plate assembly of claim 3, wherein the first passageway is formed by the first inlet extending vertically in a direction toward the intermediate plate, and the second passageway is formed by the first outlet extending vertically in a direction toward the bottom plate;

the third passage is arranged on one side of the bottom plate opposite to the middle plate or on one side of the middle plate opposite to the bottom plate, the third passage is provided with a medium inlet end communicated with the first passage and a medium outlet end communicated with the second passage, and the medium inlet end and the medium outlet end are arranged opposite to each other;

the third passages are perpendicular to the first and second passages, respectively.

5. The valve plate assembly of claim 4, wherein a side of said base plate remote from said intermediate plate is provided with a media guide channel in communication with said first inlet of at least one of said first passages, said valve plate assembly further comprising:

the medium guide plate is arranged on one side of the bottom plate, which is far away from the middle plate; the medium guide plate is provided with a medium inlet hole along the preset linear direction, and the medium inlet hole is communicated with any part of the medium guide groove.

6. A valve plate assembly according to any one of claims 1 to 5, wherein said suction passage is provided in a plurality, and at least one of said suction passages is a suction passage for the passage of a gaseous medium, and at least one of said suction passages is a feed passage for the passage of a liquid medium.

7. A pump body apparatus, comprising:

the valve plate assembly of any one of claims 1-6;

a pressure assembly for applying a positive or negative pressure to the outlet seal;

wherein the outlet seal opens the first outlet of the suction channel when the pressure assembly applies a negative pressure to the outlet seal; the outlet seal closes the first outlet of the suction passage when the pressure assembly applies a positive pressure to the outlet seal.

8. The pump body arrangement according to claim 7, characterized in that the plate package is further provided with at least one discharge channel for the passage of a gaseous or liquid medium, the discharge channel having a second inlet opening exposed to the second mounting side, a second outlet opening exposed to the first mounting side;

the valve plate assembly further includes: at least one inlet seal arranged at the second mounting side of the plate pack, the number of inlet seals being the same as the number of discharge channels and being arranged exclusively in correspondence; each inlet seal is movable relative to the plate pack for opening or closing the second inlet of a single correspondingly arranged discharge channel;

wherein the pressure assembly is further configured to apply a positive or negative pressure to the inlet seal, the inlet seal closing the second inlet of the discharge passage when the pressure assembly applies a negative pressure to the inlet seal; the inlet seal opens the second outlet of the discharge passage when the pressure assembly applies a positive pressure to the outlet seal.

9. The pump body apparatus of claim 8, wherein the pressure assembly comprises:

at least one bladder for applying a positive pressure or a negative pressure to at least one of said outlet seals and at least one of said inlet seals, said bladder further being adapted to squeeze or stretch in said pre-set linear direction;

wherein the bladder is adapted to apply a negative pressure to the outlet seal and the inlet seal, respectively, when stretched, and is further adapted to apply a negative pressure when squeezed;

the bladder is further adapted to apply a positive pressure to the outlet seal and the inlet seal, respectively, upon squeezing.

10. A diaphragm pump, comprising:

the pump body arrangement according to any one of claims 7-9;

and the driving assembly is connected with the pressure assembly and is used for driving the pressure assembly to enable the pressure assembly to generate positive pressure or negative pressure.

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