CN220705899U - Diaphragm pump - Google Patents

Abstract

A diaphragm pump is provided that includes a first diaphragm, a second diaphragm, a first flow path, and a second flow path. The first diaphragm encloses at least a portion of the first chamber and the second diaphragm encloses at least a portion of the second chamber. The first flow path communicates with the first chamber and the outside of the diaphragm pump, and the second flow path communicates with the second chamber and the outside of the diaphragm pump. The second flow path and the first flow path are independent and separate from each other. Wherein expansion and contraction of the first diaphragm is used to effect flow of the first fluid in the first flow path and expansion and contraction of the second diaphragm is used to effect flow of the second fluid in the second flow path. In this way, one diaphragm pump can simultaneously pump a plurality of different media.

Description

Diaphragm pump

Technical Field

The present application relates to the field of pumps, and more particularly to a diaphragm pump.

Background

In the case of partial liquid detection, the detection reagent and the sample to be detected need to be exchanged periodically. The exchange process needs to ensure that the detection reagent does not contact the sample to be detected. Therefore, two motors are required to drive the two pump heads respectively, so that the detection reagent and the sample to be detected are exchanged respectively. However, the two motors occupy a large space, which is disadvantageous for miniaturization of the inspection apparatus.

For example, chinese patent No. CN217976538U discloses a micro diaphragm pump. The motor drives the eccentric block to rotate, and the eccentric block drives the swing frame to continuously compress and stretch the leather cup. When the leather cup is stretched, water in the water inlet pipe enters the outer runner. When the leather cup is compressed, water in the outer runner is extruded through the water outlet pipe.

Disclosure of Invention

The present application has been made in view of the state of the art described above. It is an object of the present application to provide a membrane pump that is capable of pumping a plurality of different media simultaneously in a manner independent of each other.

In order to achieve the above object, the present application adopts the following technical solutions.

The present application provides a diaphragm pump comprising: a first diaphragm enclosing at least a portion of the first chamber; a second diaphragm enclosing at least a portion of the second chamber; a first flow path that communicates the first chamber and the outside of the diaphragm pump; and a second flow path communicating the second chamber and an outside of the diaphragm pump, the second flow path and the first flow path being independent and separated from each other, wherein expansion and contraction of the first diaphragm is used to achieve a flow of a first fluid in the first flow path, and expansion and contraction of the second diaphragm is used to achieve a flow of a second fluid in the second flow path.

In an alternative scheme, still include drive assembly, drive assembly includes rocking handle, eccentric wheel and motor, the rocking handle includes first arm, second arm and drive shaft portion, first arm with the second arm is followed the drive shaft portion extends to the radial outside of drive shaft portion, first arm with first diaphragm is connected, second arm with the second diaphragm is connected, the eccentric wheel with the motor is anti-torque to be connected, the eccentric hole has been seted up to the eccentric wheel, the central axis of eccentric hole with the axis of rotation of eccentric wheel forms certain angle, the drive shaft portion stretches into the eccentric hole makes the rocking handle with the eccentric wheel rotates to be connected.

In another alternative, the number of the first diaphragms is plural, the plurality of the first diaphragms is uniformly arranged in the circumferential direction of the rotation axis, and/or the number of the second diaphragms is plural, the plurality of the second diaphragms is uniformly arranged in the circumferential direction of the rotation axis.

In another alternative, the number of the first diaphragms is plural, the plurality of the first diaphragms are arranged adjacent to each other in the circumferential direction of the rotation axis, and/or the number of the second diaphragms is plural, the plurality of the second diaphragms are arranged adjacent to each other in the circumferential direction of the rotation axis.

In another alternative, the first diaphragm is integrally formed with the second diaphragm.

In another alternative, the maximum volume of the first chamber is not equal to the maximum volume of the second chamber.

In another alternative, the first flow path includes a first input section and a first output section, an input end of the first input section is in communication with an exterior of the diaphragm pump, an output end of the first input section is in communication with the first chamber, an input end of the first output section is in communication with the first chamber, an output end of the first output section is in communication with an exterior of the diaphragm pump, the second flow path includes a second input section and a second output section, an input end of the second input section is in communication with the exterior of the diaphragm pump, an output end of the second input section is in communication with the second chamber, an input end of the second output section is in communication with the second chamber, and an output end of the second output section is in communication with the exterior of the diaphragm pump.

In another alternative, the valve assembly further comprises a valve seat, a first input diaphragm, a first output diaphragm, a second input diaphragm and a second output diaphragm, wherein the valve seat is provided with a first input communication hole, a first output communication hole, a second input communication hole and a second output communication hole, the path of the first input section passes through the first input communication hole, the first input diaphragm covers the first input communication hole so that the first input communication hole is conducted unidirectionally, the path of the first output section passes through the first output communication hole, the first output diaphragm covers the first output communication hole so that the first output communication hole is conducted unidirectionally, the path of the second input section passes through the second input communication hole, the second input diaphragm covers the second input communication hole so that the second input communication hole is conducted unidirectionally, the path of the second output section passes through the second output communication hole, and the second output diaphragm covers the first output communication hole so that the first output communication hole is conducted unidirectionally.

In another alternative scheme, the pump cover and the valve seat are enclosed to form a first input bin, a first output bin, a second input bin and a second output bin, the pump cover is provided with a first input hole, a first output hole, a second input hole and a second output hole, the path of the first input section passes through the first input bin and the first input hole, the path of the first output section passes through the first output bin and the first output hole, the path of the second input section passes through the second input bin and the second input hole, and the path of the second output section passes through the second output bin and the second output hole.

In another alternative, the pump further comprises a gasket, the pump cover is provided with a partition wall, the valve seat is provided with a partition groove corresponding to the partition wall, the gasket is clamped by the pump cover and the valve seat, the partition wall abuts against the gasket, and at least one part of the gasket is located inside the partition groove.

By adopting the technical scheme, the first flow path can be communicated with the first chamber and the outside of the diaphragm pump, and the diaphragm pump can pump the first medium through the first flow path. The second flow path may communicate the second chamber with an exterior of the diaphragm pump, and the diaphragm pump may pump a second medium different from the first medium through the second flow path. The first flow path is isolated from the second flow path, so that the first medium is not contacted with the second medium all the time in the pumping process, one diaphragm pump can pump a plurality of different mediums at the same time, and the detection equipment with the diaphragm pump can have smaller volume.

Drawings

Fig. 1 shows an exploded view of a diaphragm pump according to a first embodiment of the present application.

Fig. 2 shows a front view of the pump cap of the diaphragm pump of fig. 1.

Fig. 3 shows a rear view of the pump cap of the diaphragm pump of fig. 1.

Fig. 4 shows a perspective view of the crank of the diaphragm pump of fig. 1.

Fig. 5 shows a cross-sectional view of the eccentric in fig. 1.

Fig. 6 shows a front view of a diaphragm body of a diaphragm pump according to a second embodiment of the present application.

Fig. 7 shows a front view of a pump cap of a diaphragm pump according to a second embodiment of the present application.

Fig. 8 shows a rear view of the pump cap of fig. 7.

Fig. 9 shows a perspective view of a valve seat according to a second embodiment of the present application.

Fig. 10 shows a perspective view of a gasket according to a second embodiment of the present application.

Description of the reference numerals

1, a pump cover; 1a first input aperture; 1b a first output aperture; 1c a second input aperture; 1d a second output aperture; 1e dividing walls; 1f, stand columns; 1g of a first input bin; 1h, a first output bin; 1i a second input bin; 1j a second output bin;

2, a gasket;

3 a valve assembly; 31 valve seat; 31a first input mounting portion; 31b a first output mounting section; 31c a first input communication hole; 31d a first output communication hole; 31e a second input mounting portion; 31f a second output mounting section; 31g of a second input communication hole; 31h a second output communication hole; 31i dividing grooves; 31j pad mounting portion; 32 a first input diaphragm; 33 a first output diaphragm; 34 a second input diaphragm; a second output diaphragm 35;

4 a diaphragm assembly; a 41 diaphragm body; 41a first membrane; 41b a second membrane; 41c a first chamber; 41d a second chamber; 42 a septum housing;

5 a drive assembly; 51 crank; 51a first arm; 51b second arm portion; 51c connecting holes; 51d a transmission shaft portion; 52 eccentric wheel; 52a central aperture; 52b eccentric holes;

and 6, a pump seat.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.

In this application, unless otherwise specified, "torsionally connected" refers to a connection capable of transmitting torque.

(first embodiment)

Fig. 1 to 5 show a diaphragm pump according to a first embodiment of the present application, which may comprise a pump cover 1, a gasket 2, a valve assembly 3, a diaphragm assembly 4, a drive assembly 5 and a pump seat 6.

Referring to fig. 2 and 3, the pump cover 1 may be provided with a first input hole 1a, a first output hole 1b, a second input hole 1c, a second output hole 1d, a partition wall 1e, and a column 1f. Specifically, the first input hole 1a, the first output hole 1b, the second input hole 1c, and the second output hole 1d may penetrate the pump cover 1. The partition wall 1e and the two columns 1f may be provided on one side of the pump cover 1 (the side of the pump cover 1 facing the gasket 2) and extend toward the valve seat 31.

The valve assembly 3 may include a valve seat 31, a first input diaphragm 32, a first output diaphragm 33, a second input diaphragm 34, and a second output diaphragm 35. Specifically, the valve seat 31 may be provided with a first input mounting portion 31a, a first output mounting portion 31b, a first input communication hole 31c, a first output communication hole 31d, a second input mounting portion 31e, a second output mounting portion 31f, a second input communication hole 31g, a second output communication hole 31h, and a partition groove 31i. The two first input mounting portions 31a may be through holes penetrating the valve seat 31, and a plurality of first input communication holes 31c may be provided radially outward of each first input mounting portion 31a. The first output mounting portion 31b may be located at one side of the valve seat 31 (the side of the valve seat 31 facing the pump cover 1) and protrude toward the pump cover 1, and two through first output communication holes 31d may be provided beside the first output mounting portion 31b. The valve seat may have a symmetry axis extending in a radial direction thereof, and the second input mounting portion 31e, the second output mounting portion 31f, the second input communication hole 31g, and the second output communication hole 31h may be arranged symmetrically with respect to the symmetry axis with respect to the first input mounting portion 31a, the first output mounting portion 31b, the first input communication hole 31c, and the first output communication hole 31d. The partition groove 31i may be located at one side of the valve seat 31, and may have a shape corresponding to the partition wall 1 e.

The two first input diaphragms 32 may be mounted to the two first input mounting portions 31a, respectively. A portion of each first input diaphragm 32 may be inserted into the first input mounting portion 31a, and another portion of each first input diaphragm 32 may be located at the other side of the valve seat 31 (the side of the valve seat 31 facing the diaphragm assembly 4) and cover the first input communication hole 31c such that the first input communication hole 31c is unidirectionally conducted. The first output diaphragm 33 may be mounted to the first output mounting portion 31b. A portion of the first output diaphragm 33 may be fitted around the first output mounting portion 31b, and another portion of the first output diaphragm 33 may be located at one side of the valve seat 31 and cover the first output communication hole 31d such that the first output communication hole 31d is unidirectionally conducted. Accordingly, the second input diaphragm 34 and the second output diaphragm 35 may be mounted to the second input mounting portion 31e and the second output mounting portion 31f, respectively, in the same manner.

The gasket 2 may be attached to the valve seat 31, and the pump cover 1 and the valve seat 31 may clamp the gasket 2. The partition wall 1e may partially press the gasket 2 into the partition groove 31i so that the partition wall 1e and the partition groove 31i are hermetically connected. The gasket 2 may be provided with a plurality of through holes, and the first input communication hole 31c, the first output communication hole 31d, the second input communication hole 31g, and the second output communication hole 31h may be exposed from the through holes in the gasket 2. The two stand columns 1f may abut against the first output diaphragm 33 and the second output diaphragm 35, respectively, so that the stand columns 1f and the first output mount 31b may clamp the first output diaphragm 33, and the stand columns 1f and the second output mount 31f may clamp the second output diaphragm 35. In this way, the first output diaphragm 33 is less likely to fall off the first output mounting portion 31b, and the second output diaphragm 35 is less likely to fall off the second output mounting portion 31f. The partition wall 1e and the partition groove 31i may partition the space enclosed by the pump cover 1 and the valve seat 31 into a first input chamber 1g, a first output chamber 1h, a second input chamber 1i, and a second output chamber 1j isolated from each other. Among them, the first input bin 1g may communicate with the first input hole 1a and the first input communication hole 31c, and the first output bin 1h may communicate with the first output hole 1b and the first output communication hole 31d. The second input bin 1i may communicate with the second input hole 1c and the second input communication hole 31g, and the second output bin 1j may communicate with the second output hole 1d and the second output communication hole 31 h.

The diaphragm assembly 4 may include a diaphragm body 41 and a diaphragm seat 42. Specifically, the diaphragm body 41 may include a first diaphragm 41a and a second diaphragm 41b formed as one body, i.e., the first diaphragm 41a and the second diaphragm 41b are part of the diaphragm body 41, and the first diaphragm 41a and the second diaphragm 41b may be bowl-shaped and recessed toward the pump seat 6. The two first diaphragms 41a and the two second diaphragms 41b may be arranged at intervals in the circumferential direction of the diaphragm body 41. Wherein the two first diaphragms 41a may be adjacently disposed, and the two second diaphragms 41b may be adjacently disposed. Adjacent diaphragms may be offset by 90 °, and the distance between each diaphragm and the central axis of the diaphragm body 41 is equal. The diaphragm seat 42 may be provided with four through holes, which may correspond to the first and second diaphragms 41a and 41 b. The diaphragm body 41 may be mounted on one side of the diaphragm seat 42 (the side of the diaphragm seat 42 facing the valve seat 31), and the two first diaphragms 41a and the two second diaphragms 41b may respectively extend into four through holes in the diaphragm seat 42.

The valve seat 31 may be snapped onto the diaphragm seat 42 and a portion of the diaphragm body 41 may be located between the valve seat 31 and the diaphragm seat 42. The valve seat 31 and the diaphragm seat 42 may clamp a portion of the diaphragm body 41 such that the valve seat 31 is sealingly connected to the diaphragm body 41. The valve seat 31 and the first diaphragm 41a may enclose a first chamber 41c, and the first chamber 41c may communicate with the first input communication hole 31c and the first output communication hole 31d. The valve seat 31 and the second diaphragm 41b may enclose a second chamber 41d, and the second chamber 41d may communicate with the second input communication hole 31g and the second output communication hole 31 h.

The drive assembly 5 may include a crank 51, an eccentric 52, and a motor (not shown). Specifically, referring to fig. 4, the rocker may include a first arm portion 51a, a second arm portion 51b, a connection hole 51c, and a transmission shaft portion 51d. Wherein the two first arm portions 51a and the two second arm portions 51b may extend radially outward of the transmission shaft portion 51d from the transmission shaft portion 51d. The first arm portion 51a and the second arm portion 51b may be arranged at intervals in the circumferential direction of the transmission shaft portion 51d. The two first arm portions 51a may be adjacently disposed, the two second arm portions 51b may be adjacently disposed, and the adjacent arm portions may be staggered by 90 °. The connection hole 51c may be opened at free ends of the first arm portion 51a and the second arm portion 51 b. The first arm portion 51a and the second arm portion 51b may be curvedly extended such that a face of the rocking handle 51 facing the diaphragm seat 42 is formed into a curved face. The top portions of the two first diaphragms 41a may be inserted into the connection holes 51c of the two first arm portions 51a, respectively, and the top portions of the two second diaphragms 41b may be inserted into the connection holes 51c of the two second arm portions 51b, respectively, so that the diaphragm body 41 is fixed to the crank 51.

Referring to fig. 5, the eccentric 52 may be provided with a center hole 52a and an eccentric hole 52b. Wherein the central axis of the central hole 52a may coincide with the rotation axis of the eccentric 52, and the rotation axis of the eccentric 52 may coincide with the central axis of the diaphragm body 41. The eccentric hole 52b may be offset from the central hole 52a, and the central axis of the eccentric hole 52b may form an angle with the central axis of the eccentric 52. The rotation shaft of the motor may be inserted into the center hole 52a and connected to the eccentric 52 in a rotationally fixed manner, and the transmission shaft portion 51d may be inserted into the eccentric hole 52b and rotatable relative to the eccentric 52.

The crank 51 and eccentric 52 may be housed inside the pump seat 6. The motor may be located outside the pump seat 6 and mounted to the pump seat 6, and a rotation shaft of the motor may extend into the inside of the pump seat 6. The pump seat 6 may be threadedly coupled to the pump cover 1 by fasteners which may sequentially pass through the pump cover 1, the valve seat 31 and the diaphragm seat 42, so that the pump cover 1 and the pump seat 6 can clamp the gasket 2, the valve seat 31, the diaphragm body 41 and the diaphragm seat 42.

In operation of the motor, the rocker arm 51 can oscillate under the guidance of the eccentric 52, so that each of the two first chambers 41c and the two second chambers 41d can be periodically expanded and contracted. Taking a first chamber 41c as an example, a detection reagent (an example of a first fluid) may enter the first input cartridge 1g from the first input aperture 1a when the first chamber 41c is in an expanded state. At this time, the first input diaphragm 32 is opened and the first output diaphragm 33 is closed, and the detection reagent may pass through the first input communication hole 31c into the first chamber 41c. When the first chamber 41c is in the contracted state, the first input diaphragm 32 is closed and the second output diaphragm 35 is opened. At this time, the detection reagent in the first chamber 41c may enter the first output chamber 1h through the first output communication hole 31d, and the detection reagent entering the first output chamber 1h may exit the diaphragm pump through the first output hole 1b. In this way, the first input hole 1a, the first input chamber 1g, the first input communication hole 31c, the first chamber 41c, the first output communication hole 31d, the first output chamber 1h, and the first output hole 1b may form a first flow path. Wherein the first input hole 1a, the first input bin 1g and the first input communication hole 31c form a first input section, and the first output communication hole 31d, the first output bin 1h and the first output hole 1b form a first output section. The first flow path may communicate the first chamber 41c with the outside of the diaphragm pump, and the diaphragm pump may pump the detection reagent through the first flow path.

Accordingly, the second input hole 1c, the second input chamber 1i, the second input communication hole 31g, the second chamber 41d, the second output communication hole 31h, the second output chamber 1j, and the second output hole 1d may form a second flow path. Wherein the second input hole 1c, the second input bin 1i, and the second input communication hole 31g may form a second input section, and the second output communication hole 31h, the second output bin 1j, and the second output hole 1d may form a second output section. The second flow path may communicate the second chamber 41d with the outside of the diaphragm pump, which may pump the sample to be measured (an example of the second fluid) through the second flow path.

Thus, the first flow path and the second flow path are independent and separated from each other, so that the detection reagent is not contacted with the detected sample all the time in the pumping process, one diaphragm pump can pump two different mediums at the same time, and the detection equipment with the diaphragm pump can have smaller volume.

Further, the maximum volume of the first chamber 41c may be different from the maximum volume of the second chamber 41 d. For example, the maximum volume of each first chamber 41c may be smaller than the maximum volume of each second chamber 41 d. The maximum volumes of the two first chambers 41c may be equal, and the maximum volumes of the two second chambers 41d may be equal. Thus, the flow rate of the detection reagent can be smaller than the flow rate of the sample to be detected, and the diaphragm pump can pump two mediums while making the flow rates of the two mediums different.

(second embodiment)

The diaphragm pump according to the second embodiment of the present application is a modification of the first embodiment, and for the same or similar features as those of the first embodiment, the same reference numerals are used in the present embodiment, and detailed description of these features is omitted.

In the second embodiment, referring to fig. 6, the two first diaphragms 41a may be uniformly arranged in the circumferential direction of the diaphragm member such that the two first diaphragms 41a are oppositely arranged with respect to the central axis of the diaphragm member. Accordingly, the two second diaphragms 41b may also be uniformly arranged in the circumferential direction of the diaphragm member. Taking two first diaphragms 41a as an example, when one first chamber 41c is in an expanded state, the other first chamber 41c may be in a contracted state. Accordingly, the two second chambers 41d may have the same variation law as the two first chambers 41 d. In this way, the diaphragm pump can have a relatively smooth pumping pressure.

Referring to fig. 7 to 9, the partition wall 1e on the pump cover 1 and the partition groove 31i on the valve seat 31 may be adapted to the diaphragm body 41. Specifically, referring to fig. 7 to 8, the first input bin 1g, the first output bin 1h, and the second output bin 1j may be nested inside the second input bin 1i, and the first output bin 1h may be nested inside the first input bin 1g. The second output bin 1j may be disposed to intersect the first input bin 1g and the first output bin 1h and be offset in the thickness direction of the pump cover 1 (the direction perpendicular to the paper surface in fig. 8) such that the first flow path and the second flow path are formed in a substantially overpass shape, the first flow path and the second flow path not interfering with each other. Accordingly, referring to fig. 9, the partition groove 31i may have a shape corresponding to the partition wall 1 e.

Referring to fig. 9 and 10, the first output diaphragm 33 and the second output diaphragm 35 may be formed integrally with the gasket 2. Specifically, the two first output diaphragms 33 and the two second output diaphragms 35 may be arranged to intersect. A U-shaped gap may be provided between the first and second output diaphragms 33, 35 and the gasket 2 so that the first and second output diaphragms 33, 35 can be opened. One side of the valve seat 31 may be provided with a protruding gasket mounting portion 31j, and the gasket 2 may be fitted around the gasket mounting portion 31j.

The present application has at least the following advantages.

(i) The first flow path may communicate the first chamber 41c with the outside of the diaphragm pump, and the diaphragm pump may pump the detection reagent through the first flow path. The second flow path may communicate the second chamber 41d with the outside of the diaphragm pump, and the diaphragm pump may pump the sample to be measured through the second flow path. The first flow path and the second flow path are independent and separated, so that the detection reagent is not contacted with the detected sample all the time in the pumping process, one diaphragm pump can pump two different mediums at the same time, and the detection equipment with the diaphragm pump can have smaller volume.

(ii) The maximum volume of the first chamber 41c may be different from the maximum volume of the second chamber 41d, and the diaphragm pump is capable of pumping two media while making the flow rates of the two media different.

(iii) The first diaphragm 41a and the second diaphragm 41b may be uniformly arranged in the circumferential direction of the rotation axis of the eccentric 52, so that the diaphragm pump can have a relatively smooth pumping pressure.

It should be understood that the above-described embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above-described embodiments without departing from the scope of the present application.

It should be understood that the number of first diaphragms 41a and the number of second diaphragms 41b are not limited to two. For example, the number of the first diaphragms 41a and the number of the second diaphragms 41b may be one or more. Preferably, the number of the first diaphragms 41a and the number of the second diaphragms 41b may be one to four. The number of first diaphragms 41a is not limited to be equal to the number of second diaphragms 41 b. For example, the number of first diaphragms 41a may be different from the number of second diaphragms 41b, so that the diaphragm pump can pump two media while the flow rates of the two media are different. The first and second diaphragms 41a and 41b are not limited to being formed as one body, and the first and second diaphragms 41a and 41b may be independent of each other.

It should be appreciated that the first and second diaphragms 41a, 41b are not limited to being driven by the crank 51, eccentric 52, and motor. For example, the first membrane 41a and the second membrane 41b may also be driven by pneumatic elements.

It should be understood that the valve assembly 3 may be replaced by a plurality of check valves independent of each other.

It should be understood that the first input bin 1g, the first output bin 1h, the second input bin 1i and the second output bin 1j are not limited to the arrangement shown in the above-described embodiments. For example, in the second embodiment, the second output bin 1j is not limited to being offset from the first input bin 1g and the first output bin 1h in the thickness direction of the pump cover 1. The partition wall 1e enclosing the second output bin 1j may extend in a meandering manner such that the second output bin 1j is in the same plane as the first input bin 1g and the first output bin 1 h. The first input bin 1g, the first output bin 1h, the second input bin 1i and the second output bin 1j are not necessary. For example, the first input hole 1a may communicate with the first input communication hole 31c through a pipe.

It should be understood that the diaphragm pump is not limited to pumping two media, but may also pump three or more media. For example, the diaphragm pump may further include a third diaphragm other than the first diaphragm 41a and the second diaphragm 41 b.

Claims (10)

1. A diaphragm pump, comprising:

a first diaphragm enclosing at least a portion of the first chamber;

a second diaphragm enclosing at least a portion of the second chamber;

a first flow path that communicates the first chamber and the outside of the diaphragm pump; and

a second flow path communicating the second chamber and the outside of the diaphragm pump, the second flow path and the first flow path being independent and separate from each other, wherein

Expansion and contraction of the first diaphragm is used to effect flow of a first fluid in the first flow path and expansion and contraction of the second diaphragm is used to effect flow of a second fluid in the second flow path.

2. The diaphragm pump of claim 1, further comprising a drive assembly including a crank, an eccentric, and a motor, the crank including a first arm portion, a second arm portion, and a drive shaft portion, the first arm portion and the second arm portion extending radially outward from the drive shaft portion, the first arm portion being connected to the first diaphragm, the second arm portion being connected to the second diaphragm, the eccentric being torsionally connected to the motor, the eccentric having an eccentric aperture, a central axis of the eccentric aperture forming an angle with a rotational axis of the eccentric, the drive shaft portion extending into the eccentric aperture such that the crank is rotationally connected to the eccentric.

3. A diaphragm pump as claimed in claim 2, wherein,

the number of the first diaphragms is plural, the plural first diaphragms are uniformly arranged in the circumferential direction of the rotation axis, and/or

The number of the second diaphragms is plural, and the plural second diaphragms are uniformly arranged in the circumferential direction of the rotation axis.

4. A diaphragm pump as claimed in claim 2, wherein,

the number of the first diaphragms is plural, the plural first diaphragms are arranged adjacent to each other in the circumferential direction of the rotation axis, and/or

The number of the second diaphragms is plural, and the plural second diaphragms are arranged adjacent to each other in the circumferential direction of the rotation axis.

5. The diaphragm pump of any of claims 1-4 where the first diaphragm is integrally formed with the second diaphragm.

6. The diaphragm pump of any of claims 1-4 wherein the maximum volume of the first chamber is unequal to the maximum volume of the second chamber.

7. A diaphragm pump as claimed in any one of claims 1 to 4,

the first flow path comprises a first input section and a first output section, wherein the input end of the first input section is communicated with the outside of the diaphragm pump, the output end of the first input section is communicated with the first cavity, the input end of the first output section is communicated with the first cavity, the output end of the first output section is communicated with the outside of the diaphragm pump,

the second flow path comprises a second input section and a second output section, wherein the input end of the second input section is communicated with the outside of the diaphragm pump, the output end of the second input section is communicated with the second cavity, the input end of the second output section is communicated with the second cavity, and the output end of the second output section is communicated with the outside of the diaphragm pump.

8. The diaphragm pump of claim 7, wherein,

the valve assembly comprises a valve seat, a first input diaphragm, a first output diaphragm, a second input diaphragm and a second output diaphragm, wherein the valve seat is provided with a first input communication hole, a first output communication hole, a second input communication hole and a second output communication hole,

the path of the first input section passes through the first input communication hole, the first input diaphragm covers the first input communication hole, so that the first input communication hole is conducted unidirectionally,

the path of the first output section passes through the first output communication hole, the first output diaphragm covers the first output communication hole, so that the first output communication hole is conducted unidirectionally,

the path of the second input section passes through the second input communication hole, the second input diaphragm covers the second input communication hole, so that the second input communication hole is conducted unidirectionally,

the path of the second output section passes through the second output communication hole, and the second output membrane covers the first output communication hole, so that the first output communication hole is conducted unidirectionally.

9. The diaphragm pump of claim 8 further comprising a pump cap enclosing with the valve seat a first input chamber, a first output chamber, a second input chamber, and a second output chamber, the pump cap defining a first input aperture, a first output aperture, a second input aperture, and a second output aperture, the path of the first input section passing through the first input chamber and the first input aperture, the path of the first output section passing through the first output chamber and the first output aperture, the path of the second input section passing through the second input chamber and the second input aperture, the path of the second output section passing through the second output chamber and the second output aperture.

10. The diaphragm pump of claim 9 further comprising a spacer, the pump cap being provided with a dividing wall, the valve seat being provided with a dividing groove corresponding to the dividing wall, the pump cap and the valve seat sandwiching the spacer, the dividing wall abutting the spacer, at least a portion of the spacer being located inside the dividing groove.