Diaphragm pump and fluid pumping method thereof

Abstract

The present application discloses a diaphragm pump and a fluid pumping method thereof. The diaphragm pump comprises a driving device and a pump body device arranged on the driving device. The pump body device comprises a diaphragm, a flow control unit and a pump body unit. The diaphragm has a plurality of diaphragm spaces with variable volumes. The flow control unit has a plurality of first flow control channels and a plurality of second flow control channels which can be opened and closed respectively. The diaphragm and the pump body unit are assembled on the bottom side and the top side of the flow control unit respectively. The pump body unit comprises a pump shell and a piston. The pump shell has an inlet channel, an outlet channel, a distribution cavity connected to the inlet channel, a piston cavity surrounded by the distribution cavity and a balance channel connected to both. The piston is movably arranged in the piston cavity to divide the piston cavity into a balance cavity and a converging cavity. The balance cavity is connected to the distribution cavity through the balance channel. The converging cavity can be connected to a piston channel of the piston. The piston channel and the outlet channel are connected. The piston moves up and down to allow or prevent the converging cavity and the piston channel to be connected.

Description

TECHNICAL FIELD

[0001] The present invention relates to a fluid pump, in particular to a diaphragm pump and a fluid pumping method thereof. BACKGROUND

[0002] A diaphragm pump is a device capable of continuously pumping fluid, which has a fluid inlet and a fluid outlet. In operation, the diaphragm pump is capable of continuously forming negative pressure at the fluid inlet to suck fluid and continuously forming positive pressure at the fluid outlet to discharge fluid, thus achieving the effect of continuously pumping fluid. The diaphragm pump has a wide range of applications in daily life, for example, a water purifier needs to be equipped with a diaphragm pump to pump water in a water tank for users to drink. The existing diaphragm pump has the defects of complex structure and poor reliability, and needs to be improved. SUMMARY

[0003] One object of the present invention is to provide a diaphragm pump and a fluid pumping method thereof, wherein a pump body unit of the diaphragm pump controls the passage of fluid by moving the piston up and down, so that the diaphragm pump has higher reliability.

[0004] One object of the present invention is to provide a diaphragm pump and a fluid pumping method thereof, wherein the pump body unit forms a balance chamber and a convergence chamber on opposite sides of the piston. Although the volume of the balance chamber and the volume of the convergence chamber change with the movement of the piston, in the diaphragm pump of the present invention, the fluid pressure of the balance chamber and the fluid pressure of the convergence chamber are always balanced, so that a smaller thrust can move the piston up and down to improve the reliability of the diaphragm pump.

[0005] One object of the present invention is to provide a diaphragm pump and a fluid pumping method thereof, wherein the pump body unit can reduce the resistance of the piston when it is pushed up by providing the balance chamber, thereby reducing the requirement for driving force of a driving device of the diaphragm pump.

[0006] One object of the present invention is to provide a diaphragm pump and a fluid pumping method thereof, wherein the pump body unit provides the balance chamber, so that after the diaphragm pump finishes pumping fluid, a reset element provided in the balance chamber can quickly and reliably push the piston to the initial position to avoid the problem of water leakage of the diaphragm pump. At the same time, the diaphragm pump reduces the requirement for the thrust that the reset element can provide.

[0007] An object of the present application is to provide a diaphragm pump and a fluid pumping method thereof, in which a seal ring is provided between a circumferential wall of a piston and an inner wall of a pump housing, and the seal ring is able to roll with respect to the piston when the piston is pushed to move up and down, so as to reduce a resistance of the piston when being pushed to move up and down while ensuring a sealing property of the diaphragm pump, thereby a smaller resistance is able to push the piston to move up and down, and the reliability of the diaphragm pump is improved.

[0008] An object of the present application is to provide a diaphragm pump and a fluid pumping method thereof, in which a guide post is provided in a pump body unit, and the guide post is used to guide a moving direction of a piston, so that the piston is able to reliably block a fluid passage after the diaphragm pump finishes pumping a fluid, thereby a problem of water leakage of the diaphragm pump is avoided.

[0009] According to an aspect of the present application, a diaphragm pump is provided, which includes a driving device and a pump body device, in which the pump body device includes:

[0010] a diaphragm having a plurality of diaphragm spaces and being drivably connected to the driving device;

[0011] a flow control unit having a plurality of first flow control passages and a plurality of second flow control passages, each of the first flow control passages and each of the second flow control passages is able to be opened and closed, respectively, in which the diaphragm is assembled to a bottom side of the flow control unit; and

[0012] a pump body unit being assembled to a top side of the flow control unit, in which the pump body unit further includes a pump housing, a piston, and a reset element, in which the pump housing has an inlet passage, an outlet passage, a distribution cavity communicated with the inlet passage, a piston cavity surrounded by the distribution cavity, and at least one balance passage communicated with the distribution cavity and the piston cavity, the piston has a piston passage, the piston is movably arranged in the piston cavity in a manner that the piston passage is communicated with the outlet passage, so as to divide the piston cavity into a balance cavity and a converging cavity, the balance cavity is communicated with the distribution cavity through the balance passage, the reset element is arranged in the balance cavity, opposite ends of the reset element are respectively abutted against the pump housing and the piston, so as to have a tendency to restore the piston to an initial position after the piston is moved in the piston cavity of the pump housing, the piston allows or prevents the converging cavity and the piston passage to be communicated in a manner of moving up and down, the first flow control passages of the flow control unit are arranged to be able to communicate the diaphragm spaces of the diaphragm and the distribution cavity of the pump housing, and the second flow control passages of the flow control unit are arranged to be able to communicate the diaphragm spaces of the diaphragm and the converging cavity of the pump housing.

[0013] According to one embodiment of the present application, the flow control unit comprises a flow control plate, at least one first flow control valve and at least one second flow control valve, wherein the first flow control passage and the second flow control passage are formed in the flow control plate, the diaphragm and the pump housing are respectively assembled at the bottom and the top of the flow control plate, the first flow control valve is deformedly arranged at the bottom of the flow control plate in correspondence with the diaphragm space of the diaphragm, the first flow control valve opens or closes the first flow control passage by deforming, the second flow control valve is deformedly arranged at the top of the flow control plate in correspondence with the converging cavity of the pump housing, the second flow control valve opens or closes the second flow control passage by deforming, and the bottom surface of the piston can be attached to or separated from the second flow control valve.

[0014] According to one embodiment of the present application, the flow control unit comprises a plurality of the first flow control valves, each of the first flow control valves is arranged to shield the first flow control passage of a portion of the flow control unit by the edge of the first flow control valve.

[0015] According to one embodiment of the present application, the flow control plate has a first mounting hole, the first flow control valve comprises a first valve sheet with a deformable edge and a first mounting column integrally extended outward from the middle of the first valve sheet, the first mounting column is mounted in the first mounting hole of the flow control plate, and from a top view, the maximum distance from the inner wall of the flow control plate for forming the first flow control passage to the central axis of the first mounting hole is less than the minimum distance from the edge of the first valve sheet to the central axis of the first mounting column, so as to allow the edge of the first flow control valve to shield the first flow control passage of the flow control unit.

[0016] According to one embodiment of the present application, the flow control unit comprises one second flow control valve, the second flow control valve is arranged to shield all the second flow control passages of the flow control unit by the edge of the second flow control valve.

[0017] According to one embodiment of the present application, the flow control plate has a second mounting hole, the second flow control valve comprises a second valve sheet with a deformable edge and a second mounting column integrally extended outward from the middle of the second valve sheet, the second mounting column is mounted in the second mounting hole of the flow control plate, and from a top view, the maximum distance from the inner wall of the flow control plate for forming the second flow control passage to the central axis of the second mounting hole is less than the minimum distance from the edge of the second valve sheet to the central axis of the second mounting column, so as to allow the edge of the second flow control valve to shield the second flow control passage of the flow control unit.

[0018] According to one embodiment of the present application, the pump body unit further comprises a sealing ring rollably disposed between the circumferential wall of the piston and the inner wall of the pump housing.

[0019] According to one embodiment of the present application, the circumferential wall of the piston is provided with a piston groove having a height dimension greater than a thickness dimension of the sealing ring to allow the sealing ring to roll within the piston groove of the piston.

[0020] According to one embodiment of the present application, the pump body unit comprises a guide post having a post passage, the guide post integrally extending upward from the piston with the post passage and the piston passage in communication, wherein a top end of the guide post is configured to be movably inserted into the outlet passage of the pump housing.

[0021] According to one embodiment of the present application, the pump body unit comprises a guide post having a post passage, the guide post integrally extending downward from the pump housing with the post passage and the outlet passage in communication, wherein a bottom end of the guide post is configured to be movably inserted into the piston passage of the piston.

[0022] According to another aspect of the present application, the present application further provides a diaphragm pump comprising a driving device and a pump body device, wherein the pump body device comprises:

[0023] a diaphragm having a plurality of diaphragm spaces and being drivably connected to the driving device;

[0024] a flow control unit having a plurality of first flow control passages and a plurality of second flow control passages, each of the first flow control passages and each of the second flow control passages being capable of being opened and closed, respectively, wherein the diaphragm is assembled to a bottom side of the flow control unit; and

[0025] A pump body unit is assembled on the top side of the flow control unit, wherein the pump body unit further comprises a pump housing, a partition ring, a guide column, a piston, and a reset element, and has at least one balance channel and at least one fluid channel, wherein the pump housing has an inlet channel, an outlet channel, and a housing space, wherein the partition ring is arranged in the housing space of the pump housing to divide the housing space into a distribution cavity and a piston cavity, and the inlet channel is communicated with the distribution cavity, wherein the guide column has a column space, and the guide column extends from the pump housing to the piston cavity in a manner that the column space is communicated with the outlet channel, wherein the piston is movably arranged in the piston cavity in a manner that the piston is sleeved on the guide column to divide the piston cavity into a balance cavity and a convergence cavity, the balance cavity is communicated with the distribution cavity through the balance channel, and the convergence cavity is communicated with the column channel through the fluid channel, wherein the reset element is arranged in the balance cavity, and opposite ends of the reset element abut against the pump housing and the piston respectively, so that the piston has a tendency to return to an initial position after the piston moves in the piston cavity, and the piston opens or closes the fluid channel in an up-down manner, wherein the first flow control channel of the flow control unit is arranged to be capable of being communicated with the diaphragm space of the diaphragm and the distribution cavity of the pump housing, and the second flow control channel of the flow control unit is arranged to be capable of being communicated with the diaphragm space of the diaphragm and the convergence cavity of the pump housing.

[0026] According to an embodiment of the present application, the flow control unit comprises a flow control plate, at least one first flow control valve, and at least one second flow control valve, wherein the first flow control channel and the second flow control channel are formed in the flow control plate, the diaphragm is assembled on the bottom of the flow control plate, the pump housing and the partition ring are arranged on the top of the flow control plate, wherein the first flow control valve is deformably arranged on the bottom of the flow control plate in a manner that the first flow control valve corresponds to the diaphragm space of the diaphragm, and the first flow control valve opens or closes the first flow control channel by deforming, wherein the second flow control valve is deformably arranged on the top of the flow control plate in a manner that the second flow control valve corresponds to the convergence cavity of the pump housing, and the second flow control valve opens or closes the second flow control channel by deforming.

[0027] According to an embodiment of the present application, the flow control unit comprises a plurality of the first flow control valves, and each of the first flow control valves is arranged to shield the first flow control channel of a part of the flow control unit by the edge of the first flow control valve.

[0028] According to an embodiment of the present application, the flow control unit comprises one second flow control valve, and the second flow control valve is arranged to shield all the second flow control channels of the flow control unit by the edge of the second flow control valve.

[0029] According to one embodiment of the present application, the balance passage of the pump body unit is formed in the partition ring body; or the balance passage of the pump body unit is formed between the partition ring body and the pump shell.

[0030] According to one embodiment of the present application, the fluid passage of the pump body unit is formed in the guide column; or the fluid passage of the pump body unit is formed between the guide column and the flow control unit.

[0031] According to another aspect of the present application, the present application further provides a fluid pumping method of a diaphragm pump, wherein the fluid pumping method comprises the following steps:

[0032] (a) increasing the volume of a diaphragm space of a diaphragm to allow fluid, which is replenished to a distribution cavity of a pump shell through an inlet passage of the pump shell, to open a first flow control passage of a flow control unit, so that the fluid is allowed to enter the diaphragm space of the diaphragm through the first flow control passage of the flow control unit;

[0033] (b) decreasing the volume of the diaphragm space of the diaphragm to allow the fluid, which enters the diaphragm space of the diaphragm, to close the first flow control passage of the flow control unit and open a second flow control passage of the flow control unit, so that the fluid enters a converging cavity of the pump shell through the second flow control passage of the flow control unit; and

[0034] (c) the fluid, which enters the converging cavity of the pump shell, drives a piston to move in a direction away from the flow control unit to allow the converging cavity and a piston passage to be communicated, so that the fluid, which enters the converging cavity of the pump shell, is sequentially pumped out through the piston passage of the piston and an outlet passage of the pump shell.

[0035] According to one embodiment of the present application, in the step (c), the piston and the pump shell compress a reset element to make the reset element accumulate elastic potential energy by elastic deformation, and when the pushing force of the fluid, which enters the converging cavity of the pump shell, disappears, the reset element pushes the piston in a direction close to the flow control unit in the process of returning to the original state to prevent the converging cavity and the piston passage from being communicated by the piston.

[0036] According to one embodiment of the present application, in the step (c), a sealing ring, which is held between the peripheral wall of the piston and the inner wall of the pump shell, is allowed to roll.

[0037] According to one embodiment of the present application, in the step (a), fluid supplemented to the distribution chamber of the pump housing drives the edge of a first flow control valve of the flow control unit to deform towards the direction away from the bottom surface of a flow control plate, to open the first flow control passage of the flow control unit.

[0038] According to one embodiment of the present application, in the step (b), fluid entering the diaphragm space of the diaphragm drives the edge of a second flow control valve of the flow control unit to deform towards the direction away from the top surface of a flow control plate, to open the second flow control passage of the flow control unit.

[0039] According to one embodiment of the present application, in the step (b), fluid entering the diaphragm space of the diaphragm drives the edge of the first flow control valve of the flow control unit to deform towards the direction close to the bottom surface of the flow control plate, to close the first flow control passage of the flow control unit, and drives the edge of the second flow control valve of the flow control unit to deform towards the direction away from the top surface of the flow control plate, to open the second flow control passage of the flow control unit. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a perspective view of a diaphragm pump according to a preferred embodiment of the present application.

[0041] Figure 2 is an exploded view of the diaphragm pump according to the above preferred embodiment of the present application.

[0042] Figure 3A and Figure 3B are perspective views of different views of a pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0043] Figure 4A and Figure 4B are exploded views of different views of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0044] Figure 5 is a perspective view of a partial structure of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0045] Figure 6 is a plan view of a partial position of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0046] Figures 7A to 7C are working process views of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0047] Figure 8 is a partial position plan view of a schematic diagram of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0048] Figures 9A to 9C are schematic diagrams of working processes of the above variant example of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application, respectively.

[0049] Figure 10 is a partial position plan view of a schematic diagram of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application.

[0050] Figure 11 is a partial position plan view of a schematic diagram of the pump body device of the diaphragm pump according to the above preferred embodiment of the present application. DETAILED DESCRIPTION

[0051] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The application is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising" or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

[0052] Also, in the disclosure of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms cannot be understood as limiting the present application; secondly, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as limiting the number.

[0053] Reference Signs List Figures 1 to 7C, a diaphragm pump according to a preferred embodiment of the present application will be disclosed and described in the following, wherein the diaphragm pump comprises a pump body device 100 and a driving device 200, the pump body device 100 is arranged at the driving device 200 to be driven by the driving device 200.

[0054] In detail, reference is made to the accompanying drawings that show a preferred embodiment of the present application, in which: Figures 3A to 7C , the pump body device 100 comprises a flow control unit 10, a pump body unit 20 and a diaphragm 30.

[0055] The flow control unit 10 has a plurality of first flow control channels 101 and a plurality of second flow control channels 102, each of the first flow control channels 101 and each of the second flow control channels 102 can be opened and closed respectively. When the first flow control channel 101 is opened, the first flow control channel 101 is allowed to communicate the top side and the bottom side of the flow control unit 10, when the first flow control channel 101 is closed, the first flow control channel 101 is prevented from communicating the top side and the bottom side of the flow control unit 10. Correspondingly, when the second flow control channel 102 is opened, the second flow control channel 102 is allowed to communicate the top side and the bottom side of the flow control unit 10, when the second flow control channel 102 is closed, the second flow control channel 102 is prevented from communicating the top side and the bottom side of the flow control unit 10.

[0056] The pump body unit 20 further comprises a pump housing 21, a piston 22, and a reset element 23. The pump housing 21 has an inlet channel 211, an outlet channel 212, a distribution cavity 213, a piston cavity 214, and at least one balance channel 215, the inlet channel 211 is communicated with the distribution cavity 213, the distribution cavity 213 surrounds the piston cavity 214, and the balance channel 215 is communicated with the distribution cavity 213 and the piston cavity 214. The piston 22 has a piston channel 221, and the piston 22 is arranged in the piston cavity 214 of the pump housing 21 in a manner that the piston channel 221 is communicated with the outlet channel 212 of the pump housing 21, so that the piston cavity 214 of the pump housing 21 is divided by the piston 22 into a balance cavity 2141 and a converging cavity 2142, i.e., the balance cavity 2141 and the converging cavity 2142 of the pump housing 21 are formed on opposite sides of the piston 22, and the balance channel 215 of the pump housing 21 is communicated with the distribution cavity 213 and the balance cavity 2141, wherein the piston 22 allows or prevents the converging cavity 2142 of the pump housing 21 and the piston channel 221 of the piston 22 to be communicated by moving up and down. The reset element 23 is arranged in the balance cavity 2141 of the pump housing 21, and opposite ends of the reset element 23 abut against the pump housing 21 and the piston 22 respectively, so as to have a tendency to push the piston 22 back to the original position after the piston 21 is pushed to move in the piston cavity 214 of the pump housing 21. The pump body unit 20 is assembled on the top side of the flow control unit 10, and the first flow control channel 101 of the flow control unit 10 is arranged to be communicated with the distribution cavity 213 of the pump housing 21, and the second flow control channel 102 of the flow control unit 10 is arranged to be communicated with the converging cavity 2142 of the pump housing 21.

[0057] The diaphragm 30 has a plurality of diaphragm spaces 31, and the diaphragm 30 is assembled on the bottom side of the flow control unit 10, and the first flow control channel 101 and the second flow control channel 102 of the flow control unit 10 are arranged to be communicated with the diaphragm spaces 31 of the diaphragm 30 respectively.

[0058] In other words, when the first flow control passage 101 of the flow control unit 10 is opened, the first flow control passage 101 is allowed to communicate the distribution cavity 213 of the pump housing 21 and the diaphragm space 31 of the diaphragm 30, and when the first flow control passage 101 of the flow control unit 10 is closed, the first flow control passage 101 is prevented from communicating the distribution cavity 213 of the pump housing 21 and the diaphragm space 31 of the diaphragm 30. Correspondingly, when the second flow control passage 102 of the flow control unit 10 is opened, the second flow control passage 102 is allowed to communicate the diaphragm space 31 of the diaphragm 30 and the converging cavity 2142 of the pump housing 21, and when the second flow control passage 102 of the flow control unit 10 is closed, the second flow control passage 102 is prevented from communicating the diaphragm space 31 of the diaphragm 30 and the converging cavity 2142 of the pump housing 21.

[0059] The diaphragm 30 is drivingly connected to the driving device 200, so that the diaphragm 30 is driven by the driving device 200 to make the volume of the diaphragm space 31 of the diaphragm 30 variable, and the diaphragm pump realizes the pumping of fluid by continuously changing the volume of the diaphragm space 31 of the diaphragm 30.

[0060] Specifically, when the diaphragm pump is in a non-working state, the volume of the diaphragm space 31 of the diaphragm 30 remains unchanged, the first flow control passage 101 of the flow control unit 10 is closed to prevent the distribution cavity 213 of the pump housing 21 and the diaphragm space 31 of the diaphragm 30 from communicating, and the second flow control passage 102 of the flow control unit 10 is closed to prevent the diaphragm space 31 of the diaphragm 30 and the converging cavity 2142 of the pump housing 21 from communicating, at this time, the reset element 23 makes the piston 22 be kept in a position preventing the converging cavity 2142 of the pump housing 21 and the piston passage 221 of the piston 22 from communicating.

[0061] When the diaphragm 30 is in working condition, the volume of the diaphragm space 31 of the diaphragm 30 is increased and decreased alternately. When the volume of the diaphragm space 31 of the diaphragm 30 is increased, the fluid supplemented to the distribution chamber 213 of the pump housing 21 through the inlet channel 211 of the pump housing 21 opens the first control flow channel 101 of the control flow unit 10, so that the fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 from the distribution chamber 213 of the pump housing 21 through the first control flow channel 101 of the control flow unit 10. When the volume of the diaphragm space 31 of the diaphragm 30 is decreased, the fluid entering the diaphragm space 31 of the diaphragm 30 closes the first control flow channel 101 of the control flow unit 10 and opens the second control flow channel 102 of the control flow unit 10, so that the fluid is prevented from flowing back to the distribution chamber 213 of the pump housing 21 through the first control flow channel 101 of the control flow unit 10 and is allowed to enter the converging chamber 2142 of the pump housing 21 through the second control flow channel 102 of the control flow unit 10. The fluid entering the converging chamber 2142 of the pump housing 21 pushes the piston 22 to move in a direction away from the control flow unit 10, so as to allow the converging chamber 2142 of the pump housing 21 and the piston channel 221 of the piston 22 to communicate with each other, and thus the fluid entering the converging chamber 2142 of the pump housing 21 is allowed to be pumped out through the piston channel 221 of the piston 22 and the outlet channel 212 of the pump housing 21 in sequence. It can be understood that when the fluid entering the converging chamber 2142 of the pump housing 21 pushes the piston 22 in a direction away from the control flow unit 10, the pump housing 21 and the piston 22 press the reset element 23 to make it elastically deformed to accumulate elastic potential energy. When the volume of the diaphragm space 31 of the diaphragm 30 is increased again, the fluid entering the converging chamber 2142 of the pump housing 21 closes the second control flow channel 102 of the control flow unit 10, the fluid supplemented to the distribution chamber 213 of the pump housing 21 through the inlet channel 211 of the pump housing 21 opens the first control flow channel 101 of the control flow unit 10, so that the fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 from the distribution chamber 213 of the pump housing 21 through the first control flow channel 101 of the control flow unit 10 again. This process is repeated, so that the diaphragm pump can continuously pump fluid.

[0062] When the diaphragm switches from the working state to the non-working state, the reset element 23 pushes the piston 22 to move towards the direction of the flow control unit 10 in the process of returning to the initial state to prevent the converging cavity 2142 of the pump shell 21 and the piston channel 221 of the piston 22 from being connected, at this time, the volume of the diaphragm space 31 of the diaphragm 30 remains unchanged, the first flow control channel 101 of the flow control unit 10 is closed to prevent the distribution cavity 213 of the pump shell 21 and the diaphragm space 31 of the diaphragm 30 from being connected, and the second flow control channel 102 of the flow control unit 10 is closed to prevent the diaphragm space 31 of the diaphragm 30 and the converging cavity 2142 of the pump shell 21 from being connected.

[0063] Now turning to the drawings Figures 7A to 7C The pump shell 21 of the pump body unit 20 forms the balancing cavity 2141 and the converging cavity 2142 on the opposite sides of the piston 22, although the volumes of the balancing cavity 2141 and the converging cavity 2142 of the pump shell 21 change with the movement of the piston 22, in the diaphragm pump of the present application, the pressure of the balancing cavity 2141 and the pressure of the converging cavity 2142 of the pump shell 21 are always balanced, so that a smaller pushing force can push the piston 22 to move up and down, to reduce the requirement of the driving force of the driving device 200 for the diaphragm pump and the requirement of the pushing force that the reset element 23 can provide, and to improve the reliability of the diaphragm pump. Moreover, after the diaphragm pump finishes pumping fluid, the reset element 23 can quickly and reliably push the piston 22 to return to the initial position to avoid the problem of water leakage of the diaphragm pump.

[0064] It is worth mentioning that the manner in which the diaphragm 30 is drivingly connected to the driving device 200 is not limited in the diaphragm pump of the present application, as long as the driving device 200 can drive the diaphragm 30 to change the volume of the diaphragm space 31 of the diaphragm 30.

[0065] Specifically, turning to the drawings Figure 2The diaphragm 30 includes a connecting portion 32, a plurality of deformable cup-shaped portions 33, and a plurality of driven arms 34. Each of the cup-shaped portions 33 is integrally extended downward from the connecting portion 32. Each of the driven arms 34 is integrally extended downward from a bottom of each of the cup-shaped portions 33. The diaphragm space 31 of the diaphragm 30 is formed in the cup-shaped portions 33. That is, the connecting portion 32, each of the cup-shaped portions 33, and each of the driven arms 34 of the diaphragm 30 are integrally formed, for example, by injection molding of silicone or rubber. The connecting portion 32 of the diaphragm 30 is assembled to the flow control unit 10. At least one of the first flow control passages 101 and at least one of the second flow control passages 102 of the flow control unit 10 are arranged corresponding to the same one of the cup-shaped portions 33 of the diaphragm 30, so as to allow at least one of the first flow control passages 101 and at least one of the second flow control passages 102 of the flow control unit 10 to be arranged to be able to communicate with the same one of the diaphragm spaces 31 of the diaphragm 30.

[0066] The driving device 200 includes a driving motor 2001 and a swinging portion 2002 which is drivingly mounted to an output shaft of the driving motor 2001. The swinging portion 2002 has a plurality of swinging arms 20021. Each of the driven arms 34 of the diaphragm 30 is drivingly connected to each of the swinging arms 20021 of the swinging portion 2002. When the driving motor 2001 drives the swinging portion 2002 to swing, each of the swinging arms 20021 of the swinging portion 2002 drives each of the driven arms 34 of the diaphragm 30 to swing, so as to change a shape of each of the cup-shaped portions 33 of the diaphragm 30, and increase or decrease a volume of each of the diaphragm spaces 31 of the diaphragm 30.

[0067] Preferably, the driving device 200 further includes an assembly ring 2003 which is assembled to a top end of the driving motor 2001 and surrounds an outside of the swinging portion 2002 so that the swinging portion 2002 is visually invisible. The pump body device 100 is assembled to the assembly ring 2003.

[0068] With continued reference to the drawings Figures 4A to 6 The flow control unit 10 includes a flow control plate 11, at least one first flow control valve 12, and at least one second flow control valve 13. The first flow control passages 101 and the second flow control passages 102 of the flow control unit 10 are formed in the flow control plate 11.

[0069] The diaphragm 30 is assembled on the bottom of the flow control plate 11, and at least one of the first flow control passages 101 and at least one of the second flow control passages 102 of the flow control unit 10 correspond to one of the diaphragm spaces 31 of the diaphragm 30, respectively, to allow the opened first flow control passage 101 and the opened second flow control passage 102 to communicate with the diaphragm space 31 of the diaphragm 30. For example, the diaphragm 30 can be assembled on the bottom of the flow control plate 11 in a manner that the top surface of the connecting portion 32 is attached to the bottom surface of the flow control plate 11, to ensure the sealing of the assembly position of the diaphragm 30 and the flow control plate 11.

[0070] The pump housing 21 is assembled on the top of the flow control plate 11, and each of the second flow control passages 102 of the flow control unit 10 corresponds to the converging cavity 2142 of the pump housing 21, respectively, to allow the opened second flow control passage 102 to communicate with the converging cavity 2142 of the pump housing 21. In some embodiments of the diaphragm pump of the present application, the pump housing 21 can be directly assembled on the top of the flow control plate 11, while in other embodiments of the diaphragm pump of the present application, the pump housing 21 can be indirectly assembled on the top of the flow control plate 11 through a sealing gasket 40. Figures 1 to 7C In this specific example of the diaphragm pump of the present application shown in the drawings, the pump body device 100 further comprises a sealing gasket 40, the sealing gasket 40 has a plurality of first gasket passages 41 and a second gasket passage 42, the sealing gasket 40 is assembled between the flow control plate 11 and the pump housing 21 in a manner that the first gasket passages 41 correspond to and communicate with the first flow control passages 101 and the second gasket passage 42 correspond to and communicate with the second flow control passages 42, to ensure the sealing of the assembly position of the pump housing 21 and the flow control plate 11.

[0071] The first flow control valve 12 is deformedly arranged on the bottom of the flow control plate 11 in a manner that it corresponds to the diaphragm space 31 of the diaphragm 30, and the first flow control valve 12 opens or closes the first flow control passage 101 of the flow control unit 10 by deforming. Preferably, the number of the first flow control valve 12 is plural, and each of the first flow control valve 12 is arranged to shield a part of the first flow control passage 101 of the flow control portion 10 by the edge of the first flow control valve 12.

[0072] Specifically, the flow control plate 11 has a first mounting hole 111, wherein the first flow control valve 12 comprises a first valve sheet 121 with a deformable edge and a first mounting column 122 integrally extending outward from the middle of the first valve sheet 121, the first mounting column 122 is mounted in the first mounting hole 111 of the flow control plate 11 to set the first flow control valve 12 on the flow control plate 11, and from the perspective of the top view, the maximum distance from the inner wall of the flow control plate 11 for forming the first flow control channel 101 to the central axis of the first mounting hole 111 is less than the minimum distance from the edge of the first valve sheet 121 to the central axis of the first mounting column 122, so as to allow the edge of the first flow control valve 12 to block the first flow control channel 101 of the flow control unit 10.

[0073] More specifically, when the edge of the first valve sheet 121 of the first flow control valve 12 is not deformed, the first valve sheet 121 is attached to the bottom surface of the flow control plate 11 in a manner of blocking the first flow control channel 101 of the flow control unit 10, at this time, the first flow control channel 101 of the flow control unit 10 is closed. When the first valve sheet 121 of the first flow control valve 12 is driven to deform in a direction away from the bottom surface of the flow control plate 11, a gap is formed between the first valve sheet 121 and the bottom surface of the flow control plate 11 to open the first flow control channel 101 of the flow control unit 10.

[0074] The second flow control valve 13 is deformably arranged on the top of the flow control plate 11 in a manner corresponding to the converging cavity 2142 of the pump shell 21, and the second flow control valve 13 opens or closes the second flow control channel 102 of the flow control unit 10 by deforming. Preferably, the number of the second flow control valve 13 is one, and the second flow control valve 13 is arranged in a manner that the edge of the second flow control valve 13 blocks all the second flow control channels 102 of the flow control unit 10.

[0075] Specifically, the flow control plate 11 has a second mounting hole 112, wherein the second flow control valve 13 comprises a second valve sheet 131 with a deformable edge and a second mounting column 132 integrally extending outward from the middle of the second valve sheet 131, the second mounting column 132 is mounted in the second mounting hole 112 of the flow control plate 11 to set the second flow control valve 13 on the flow control plate 11, and from the perspective of the top view, the maximum distance from the inner wall of the flow control plate 11 for forming the second flow control channel 102 to the central axis of the second mounting hole 112 is less than the minimum distance from the edge of the second valve sheet 131 to the central axis of the second mounting column 132, so as to allow the edge of the second flow control valve 13 to block the second flow control channel 102 of the flow control unit 10.

[0076] More specifically, when the edge of the second valve plate 131 of the second flow control valve 13 is not deformed, the second valve plate 131 is attached to the top surface of the flow control plate 11 in a manner of blocking the second flow control passage 102 of the flow control unit 10, at this time, the second flow control passage 102 of the flow control unit 10 is closed. When the second valve plate 131 of the second flow control valve 13 is driven to be deformed towards the direction away from the top surface of the flow control plate 11, a gap is generated between the second valve plate 131 and the top surface of the flow control plate 11 to open the second flow control passage 102 of the flow control unit 10.

[0077] Preferably, referring to the accompanying drawings Figures 6 to 7C , the bottom surface of the piston 22 is arranged to be able to attach to or away from the second flow control valve 13, wherein when the bottom surface of the piston 22 is attached to the second flow control valve 13, the piston 22 prevents the converging cavity 2142 of the pump shell 21 and the piston passage 221 of the piston 22 from being connected, and when the bottom surface of the piston 22 is away from the second flow control valve 13, the piston 22 allows the converging cavity 2142 of the pump shell 21 and the piston passage 221 of the piston 22 to be connected.

[0078] Continuing to refer to the accompanying drawings Figures 3A to 7C , the pump body unit 20 further comprises a sealing ring 24, the sealing ring 24 is arranged to be rollable between the peripheral wall of the piston 22 and the inner wall of the pump shell 21, wherein when the piston 22 is pushed to move up and down, the sealing ring 24 can roll relative to the piston 22 to reduce the resistance of the piston 22 when being pushed up and down while ensuring the sealing of the diaphragm pump, so that smaller resistance can push the piston 22 to move up and down, thereby reducing the requirement of the driving force of the driving device 200 on the diaphragm pump and reducing the requirement of the pushing force that the reset element 23 can provide, and improving the reliability of the diaphragm pump. And after the diaphragm pump finishes pumping fluid, the reset element 23 can quickly and reliably push the piston 22 to return to the initial position to avoid the problem of water leakage of the diaphragm pump.

[0079] Now turn to the accompanying drawings Figures 6 to 7C, the peripheral wall of the piston 22 is provided with a piston groove 222, the height dimension of the piston groove 222 is greater than the thickness dimension of the sealing ring 24, so that when the piston 22 is pushed to move up and down, the sealing ring 24 can roll relative to the piston 22 in the piston groove 222 of the piston 22, and avoid the sealing ring 24 from being separated from the piston 22. In other words, by rollably arranging the sealing ring 24 in the piston groove 222 of the piston 22, the sealing ring 24 can be reliably retained between the piston 22 and the pump shell 21 to ensure the reliability of the diaphragm pump.

[0080] With reference to the accompanying drawings Figures 4A to 7C , the pump body unit 20 further comprises a guide column 25, the guide column 25 integrally extends upward from the piston 22 with a column passage 251, the column passage 251 and the piston passage 221 of the piston 22 are in communication, and the top end of the guide column 25 is arranged to be movably inserted into the outlet passage 212 of the pump shell 21. In other words, the piston 22 and the guide column 25 of the pump body unit 20 are an integral structure.

[0081] When the piston 22 is pushed to move upward by the water entering the converging cavity 2142 of the pump shell 21, the guide column 25 moves upward in the outlet passage 212 of the pump shell 21, and when the piston 22 is pushed to move downward by the reset element 23, the guide column 25 moves downward in the outlet passage 212 of the pump shell 21, that is, the pump shell 21 and the guide column 25 cooperate to guide the moving direction of the piston 22, so that after the diaphragm pump finishes pumping fluid, the piston 22 can reliably block the passage of fluid to avoid the problem of water leakage of the diaphragm pump.

[0082] With reference to the accompanying drawings Figures 1 to 7C , the pump shell 21 comprises an outer shell 216 and an inner shell 217 embedded in the inside of the outer shell 216, the inlet passage 211 and the outlet passage 212 are formed in the outer shell 216, for example, the inlet passage 211 and the outlet passage 212 can be formed at the top end of the outer shell 216, the distribution cavity 213 is formed between the outer shell 216 and the inner shell 217, and the piston cavity 214 and the balance passage 215 are formed in the inner shell 217. Further, the pump shell 21 comprises a first sealing ring 218, the first sealing ring 218 is arranged between the outer shell 216 and the inner shell 217 in a sleeved manner to prevent the fluid entering the distribution cavity 213 of the pump shell 21 from leaking between the outer shell 216 and the inner shell 217, thereby improving the sealing performance of the diaphragm pump.

[0083] Furthermore, the pump body assembly 100 includes a second sealing ring 50, which is disposed between the guide post 25 and the inner shell 217 in such a way that it is fitted onto the guide post 25, so as to prevent fluid entering the balance chamber 2141 of the pump housing 21 from leaking between the guide post 25 and the inner shell 217, thereby improving the sealing performance of the diaphragm pump.

[0084] Preferably, the second sealing ring 50 is rotatably disposed between the guide post 25 and the inner shell 217. When the piston 22 is pushed up and down, the second sealing ring 50 can roll relative to the guide post 25 to ensure the sealing performance of the diaphragm pump while reducing the resistance of the piston 22 when pushed up and down. This allows for lower resistance in pushing the piston 22 up and down, reducing the driving force requirements of the diaphragm pump on the drive device 200 and the thrust requirements of the reset element 23, and improving the reliability of the diaphragm pump. Furthermore, after the diaphragm pump finishes pumping fluid, the reset element 23 can quickly and reliably push the piston 22 back to its initial position to prevent leakage from the diaphragm pump.

[0085] Appendix Figures 7A to 7C The process of the diaphragm pump pumping fluid is illustrated.

[0086] Reference Appendix Figure 7A When the diaphragm pump is not in operation, the volume of the diaphragm space 31 of the diaphragm 30 remains unchanged. The edge of the first flow control valve 12 of the flow control unit 10 is attached to the bottom surface of the flow control plate 11 to close the first flow control channel 101, thereby preventing the distribution chamber 213 of the pump housing 21 from communicating with the diaphragm space 31 of the diaphragm 30. The edge of the second flow control valve 13 of the flow control unit 10 is attached to the top surface of the flow control plate 11 to close the second flow control channel 102, thereby preventing the diaphragm space 31 of the diaphragm 30 from communicating with the converging chamber 2142 of the pump housing 21. At this time, the reset element 23 causes the bottom surface of the piston 22 to be attached to the second flow control valve 13, thereby preventing the converging chamber 2142 of the pump housing 21 from communicating with the piston channel 221 of the piston 22.

[0087] Reference Appendix Figure 7BWhen the volume of the diaphragm space 31 of the diaphragm 30 increases, the pressure in the diaphragm space 31 of the diaphragm 30 is less than the pressure in the distribution chamber 213 and the converging chamber 2142 of the pump housing 21. The fluid in the converging chamber 2142 of the pump housing 21 keeps the edge of the second valve plate 131 of the second flow control valve 13 in contact with the top surface of the flow control plate 11, thereby closing the second flow control channel 102 of the flow control unit 10. At the same time, the fluid flows through the inlet of the pump housing 21... The fluid supplied to the distribution chamber 213 via channel 211 pushes the edge of the first valve plate 121 of the first flow control valve 12 to deform toward the bottom surface of the flow control plate 11, thereby creating a gap between the edge of the first valve plate 121 and the bottom surface of the flow control plate 11 and opening the first flow control channel 101 of the flow control unit 10. As a result, fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 from the distribution chamber 213 of the pump housing 21 through the first flow control channel 101 of the flow control unit 10.

[0088] Reference Appendix Figure 7C When the volume of the diaphragm space 31 of the diaphragm 30 decreases, the pressure in the diaphragm space 31 of the diaphragm 30 is greater than the pressure in the distribution chamber 213 and the converging chamber 2142 of the pump housing 21. The fluid in the diaphragm space 31 of the diaphragm 30 causes the edge of the first valve plate 121 of the first flow control valve 12 to deform toward the bottom surface of the flow control plate 11, so that the edge of the first valve plate 121 returns to the state of adhering to the bottom surface of the flow control plate 11, thereby preventing the first control of the flow control unit 10 from being activated. The fluid in the diaphragm space 31 of the diaphragm 30 causes the edge of the second valve plate 131 of the second flow control valve 13 to deform away from the top surface of the flow control plate 11, thereby creating a gap between the edge of the second valve plate 131 and the top surface of the flow control plate 11 and opening the second flow control channel 102 of the flow control unit 10. As a result, fluid is allowed to enter the converging chamber 2142 of the pump housing 21 from the diaphragm space 31 of the diaphragm 30 through the second flow control channel 102 of the flow control unit 10.

[0089] After the fluid enters the converging cavity 2142 of the pump housing 21 from the diaphragm space 31 of the diaphragm 30 through the second flow control passage 102 of the flow control unit 10, the upward pushing force of the fluid in the converging cavity 2142 of the pump housing 21 on the piston 22 is greater than the downward pushing force of the reset element 23 on the piston 22, so that the piston 22 moves toward the direction away from the second flow control valve 13 to allow the converging cavity 2142 of the pump housing 21 and the piston passage 221 of the piston 22 to communicate with each other, and the fluid entering the converging cavity 2142 of the pump housing 21 is allowed to be pumped out through the piston passage 221 of the piston 22 and the outlet passage 212 of the pump housing 21 in sequence. During the upward movement of the guide column 25 driven by the piston 22, the sealing ring 24 rolls relative to the piston 22, and the second sealing ring 50 rolls relative to the guide column 25, so as to reduce the resistance of the piston 22 when being pushed up and down while ensuring the sealing of the diaphragm pump, thereby reducing the driving force required by the diaphragm pump for the driving device 200 and the pushing force required by the reset element 23, and improving the reliability of the diaphragm pump. Moreover, after the diaphragm pump finishes pumping fluid, the reset element 23 can quickly and reliably push the piston 22 back to the initial position to avoid the problem of water leakage of the diaphragm pump.

[0090] According to another aspect of the present application, the present application further provides a fluid pumping method of the diaphragm pump, wherein the fluid pumping method comprises the following steps:

[0091] (a) increasing the volume of the diaphragm space 31 of the diaphragm 30 to allow the fluid supplemented to the distribution cavity 213 of the pump housing 21 through the inlet passage 211 of the pump housing 21 to open the first flow control passage 101 of the flow control unit 10, so that the fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 through the first flow control passage 101 of the flow control unit 10;

[0092] (b) reducing the volume of the diaphragm space 31 of the diaphragm 30 to allow the fluid entering the diaphragm space 31 of the diaphragm 30 to close the first flow control passage 101 of the flow control unit 10 and open the second flow control passage 102 of the flow control unit 10, so that the fluid enters the converging cavity 2142 of the pump housing 21 through the second flow control passage 102 of the flow control unit 10; and

[0093] (c) fluid entering the converging chamber 2142 of the pump housing 21 drives the piston 22 to move towards the direction away from the flow control unit 10, so as to allow the converging chamber 2142 and the piston passage 221 to be communicated, and thus the fluid entering the converging chamber 2142 of the pump housing 21 is sequentially pumped out through the piston passage 221 of the piston 22 and the outlet passage 212 of the pump housing 21.

[0094] Fig. 2 shows a sectional view of the diaphragm pump of Fig. 1. Figures 8 to 9C Fig. 3 shows a sectional view of another embodiment of the diaphragm pump of the present application. Figures 1 to 7C Fig. 4 shows a sectional view of another embodiment of the diaphragm pump of the present application. Figures 8 to 9C In this specific embodiment of the diaphragm pump shown in Fig. 4, the balancing passage 215 of the pump housing 21 is formed between the outer shell 216 and the inner shell 217, and the second sealing ring 50 is arranged between the guide post 25 and the outer shell 216 in a manner of being sleeved on the guide post 25, so as to prevent the fluid entering the balancing chamber 2141 of the pump housing 21 from leaking through the space between the guide post 25 and the outer shell 216, and thus the sealing performance of the diaphragm pump is improved.

[0095] Fig. 5 shows a sectional view of the diaphragm pump of Fig. 4. Figures 9A to 9C Fig. 6 shows a process of pumping fluid by the diaphragm pump of Fig. 4.

[0096] Fig. 7 shows a sectional view of another embodiment of the diaphragm pump of the present application. Figure 9A When the diaphragm pump is in a non-working state, the volume of the diaphragm space 31 of the diaphragm 30 remains unchanged, the edge of the first flow control valve 12 of the flow control unit 10 is attached to the bottom surface of the flow control plate 11 to close the first flow control passage 101, so as to prevent the distribution chamber 213 of the pump housing 21 and the diaphragm space 31 of the diaphragm 30 from being communicated, the edge of the second flow control valve 13 of the flow control unit 10 is attached to the top surface of the flow control plate 11 to close the second flow control passage 102, so as to prevent the diaphragm space 31 of the diaphragm 30 and the converging chamber 2142 of the pump housing 21 from being communicated, and at this time, the reset element 23 makes the bottom surface of the piston 22 attached to the second flow control valve 13, so as to prevent the converging chamber 2142 of the pump housing 21 and the piston passage 221 of the piston 22 from being communicated.

[0097] Fig. 8 shows a sectional view of another embodiment of the diaphragm pump of the present application. Figure 9BWhen the volume of the diaphragm space 31 of the diaphragm 30 is increased, the pressure of the diaphragm space 31 of the diaphragm 30 is less than the pressure of the distribution cavity 213 and the converging cavity 2142 of the pump housing 21, the fluid in the converging cavity 2142 of the pump housing 21 keeps the edge of the second valve plate 131 of the second flow control valve 13 in a state of adhering to the top surface of the flow control plate 11 to close the second flow control passage 102 of the flow control unit 10, at the same time, the fluid supplemented to the distribution cavity 213 through the inlet passage 211 of the pump housing 21 pushes the edge of the first valve plate 121 of the first flow control valve 12 to deform towards the direction away from the bottom surface of the flow control plate 11 to generate a gap between the edge of the first valve plate 121 and the bottom surface of the flow control plate 11 to open the first flow control passage 101 of the flow control unit 10, so that the fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 from the distribution cavity 213 of the pump housing 21 through the first flow control passage 101 of the flow control unit 10.

[0098] Reference is made to the accompanying drawings that show by way of example Figure 9C When the volume of the diaphragm space 31 of the diaphragm 30 is decreased, the pressure of the diaphragm space 31 of the diaphragm 30 is greater than the pressure of the distribution cavity 213 and the converging cavity 2142 of the pump housing 21, the fluid of the diaphragm space 31 of the diaphragm 30 makes the edge of the first valve plate 121 of the first flow control valve 12 deform towards the direction close to the bottom surface of the flow control plate 11 to make the edge of the first valve plate 121 restore to the state of adhering to the bottom surface of the flow control plate 11 to avoid the first flow control passage 101 of the flow control unit 10, at the same time, the fluid of the diaphragm space 31 of the diaphragm 30 makes the edge of the second valve plate 131 of the second flow control valve 13 deform towards the direction away from the top surface of the flow control plate 11 to generate a gap between the edge of the second valve plate 131 and the top surface of the flow control plate 11 to open the second flow control passage 102 of the flow control unit 10, so that the fluid is allowed to enter the converging cavity 2142 of the pump housing 21 from the diaphragm space 31 of the diaphragm 30 through the second flow control passage 102 of the flow control unit 10.

[0099] After the fluid enters the converging cavity 2142 of the pump housing 21 from the diaphragm space 31 of the diaphragm 30 through the second flow control passage 102 of the flow control unit 10, the upward pushing force of the fluid in the converging cavity 2142 of the pump housing 21 on the piston 22 is greater than the downward pushing force of the reset element 23 on the piston 22, so that the piston 22 moves toward the direction away from the second flow control valve 13 to allow the converging cavity 2142 of the pump housing 21 and the piston passage 221 of the piston 22 to be communicated, and the fluid entering the converging cavity 2142 of the pump housing 21 is allowed to be pumped out through the piston passage 221 of the piston 22 and the outlet passage 212 of the pump housing 21 in sequence. During the upward movement of the guide column 25 driven by the piston 22, the sealing ring 25 rolls relative to the piston 22, and the second sealing ring 50 rolls relative to the guide column 25, so as to reduce the resistance of the piston 22 when being pushed up and down while ensuring the sealing of the diaphragm pump, thereby reducing the driving force required by the diaphragm pump for the driving device 200 and the pushing force required by the reset element 23, and improving the reliability of the diaphragm pump. After the diaphragm pump finishes pumping fluid, the reset element 23 can quickly and reliably push the piston 22 back to the initial position to avoid the problem of water leakage of the diaphragm pump.

[0100] attached drawings Figure 10 Another variant of the diaphragm pump according to the above preferred embodiment of the present application is shown in the attached drawings Figures 8 to 9C The difference between the diaphragm pump shown in the attached drawings Figure 10 In this specific example of the diaphragm pump shown in the attached drawings, the guide column 25 extends downward from the pump housing 21 in a manner that the cylinder passage 251 and the outlet passage 212 of the pump housing 21 are communicated, and the bottom end of the guide column 25 is arranged to be movably inserted into the piston passage 221 of the piston 22, wherein the guide column 25 can guide the movement direction of the piston 22, so that after the diaphragm pump finishes pumping fluid, the piston 22 can reliably block the fluid passage to avoid the problem of water leakage of the diaphragm pump.

[0101] attached drawings Figure 11 Another variant of the diaphragm pump according to the above preferred embodiment of the present application is shown in the attached drawings Figures 1 to 7CThe difference between the diaphragm pump shown and the pump body unit 20 of the pump body device 100 is that the pump body unit 20 comprises a pump shell 21A, a piston 22A, a reset element 23A, a guide column 25A, and a partition ring 26A, and the pump body unit 20 has at least one balance channel 215A and at least one fluid channel 218A.

[0102] The pump shell 21A has an inlet channel 211A, an outlet channel 212A, and a shell space 219A. The partition ring 26A is arranged in the shell space 219A of the pump shell 21A to divide the shell space 219A into a distribution cavity 213A and a piston cavity 214A, and the inlet channel 211A is communicated with the distribution cavity 213A. The guide column 25A has a column space 251A, and the guide column 25A extends from the pump shell 21A to the piston cavity 214A in a manner that the column space 251A is communicated with the outlet channel 212A of the pump shell 21A. The piston 22A is movably arranged in the piston cavity 214A of the pump shell 21A in a manner that the piston 22A is sleeved on the guide column 25A to divide the piston cavity 214A into a balance cavity 2141A and a converging cavity 2142A, the balance cavity 2141A is communicated with the distribution cavity 213A through the balance channel 215A, and the converging cavity 2142A is communicated with the column space 251A of the guide column 25A through the fluid channel 218A. The reset element 23A is arranged in the balance cavity 2141A of the pump shell 21A, and the opposite ends of the reset element 23A abut against the pump shell 21A and the piston 22A, respectively, so that the piston 22A has a tendency to return to the original position after being pushed to move in the piston cavity 214A of the pump shell 21A, and the piston 22A opens or closes the fluid channel 218A in an up-down movement. The pump body unit 20 is assembled on the top side of the flow control unit 10, and the first flow control channel 101 of the flow control unit 10 is arranged to be communicated with the distribution cavity 213A of the pump shell 21A, and the second flow control unit 102 of the flow control unit 10 is arranged to be communicated with the converging cavity 2142A of the pump shell 21A.

[0103] The balance channel 215A of the pump body unit 20 can be formed in the partition ring 26A, or between the pump shell 21A and the partition ring 26A. The fluid channel 218A of the pump body unit 20 can be formed in the guide column 25A, or between the guide column 25A and the flow control unit 10.

[0104] The diaphragm 30 has a plurality of diaphragm spaces 31, wherein the diaphragm 30 is assembled at the bottom side of the flow control unit 10, and the first flow control passage 101 and the second flow control passage 102 of the flow control unit 10 are respectively provided to be able to communicate with the diaphragm spaces 31 of the diaphragm 30.

[0105] In other words, when the first flow control passage 101 of the flow control unit 10 is opened, the first flow control passage 101 is allowed to communicate the distribution cavity 213A of the pump housing 21A and the diaphragm spaces 31 of the diaphragm 30, and when the first flow control passage 101 of the flow control unit 10 is closed, the first flow control passage 101 is prevented from communicating the distribution cavity 213A of the pump housing 21A and the diaphragm spaces 31 of the diaphragm 30. Accordingly, when the second flow control passage 102 of the flow control unit 10 is opened, the second flow control passage 102 is allowed to communicate the diaphragm spaces 31 of the diaphragm 30 and the convergence cavity 2142A of the pump housing 21A, and when the second flow control passage 102 of the flow control unit 10 is closed, the second flow control passage 102 is prevented from communicating the diaphragm spaces 31 of the diaphragm 30 and the convergence cavity 2142A of the pump housing 21A.

[0106] Specifically, when the diaphragm pump is in a non-working state, the volume of the diaphragm spaces 31 of the diaphragm 30 remains unchanged, the first flow control passage 101 of the flow control unit 10 is closed to prevent the distribution cavity 213A of the pump housing 21A and the diaphragm spaces 31 of the diaphragm 30 from communicating, and the second flow control passage 102 of the flow control unit 10 is closed to prevent the diaphragm spaces 31 of the diaphragm 30 and the convergence cavity 2142A of the pump housing 21A from communicating, at this time, the reset element 23A causes the piston 22A to be kept in a position closing the fluid passage 218A.

[0107] When the diaphragm 30 is in operation, the volume of the diaphragm space 31 of the diaphragm 30 is increased and decreased alternately. When the volume of the diaphragm space 31 of the diaphragm 30 is increased, the fluid supplemented to the distribution chamber 213A of the pump housing 21A through the inlet channel 211A of the pump housing 21A opens the first control flow channel 101 of the control flow unit 10, so that the fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 from the distribution chamber 213A of the pump housing 21A through the first control flow channel 101 of the control flow unit 10. When the volume of the diaphragm space 31 of the diaphragm 30 is decreased, the fluid entering the diaphragm space 31 of the diaphragm 30 closes the first control flow channel 101 of the control flow unit 10 and opens the second control flow channel 102 of the control flow unit 10, so that the fluid is prevented from flowing back to the distribution chamber 213A of the pump housing 21A through the first control flow channel 101 of the control flow unit 10 and is allowed to enter the converging chamber 2142A of the pump housing 21A through the second control flow channel 102 of the control flow unit 10. The fluid entering the converging chamber 2142A of the pump housing 21A pushes the piston 22A to move in a direction away from the control flow unit 10 to open the fluid channel 218A, so as to allow the converging chamber 2142A of the pump housing 21A to communicate with the column space 251A of the guide column 25A through the fluid channel 218A, and thus the fluid entering the converging chamber 2142A of the pump housing 21A is allowed to be pumped out through the column channel 251A of the guide column 25A and the outlet channel 212A of the pump housing 21A in sequence. It can be understood that when the fluid entering the converging chamber 2142A of the pump housing 21A pushes the piston 22A in a direction away from the control flow unit 10, the pump housing 21A and the piston 22A press the reset element 23A to make it elastically deformed to accumulate elastic potential energy. When the volume of the diaphragm space 31 of the diaphragm 30 is increased again, the fluid entering the converging chamber 2142A of the pump housing 21A closes the second control flow channel 102 of the control flow unit 10, the fluid supplemented to the distribution chamber 213A of the pump housing 21A through the inlet channel 211A of the pump housing 21A opens the first control flow channel 101 of the control flow unit 10, so that the fluid is allowed to enter the diaphragm space 31 of the diaphragm 30 from the distribution chamber 213A of the pump housing 21A through the first control flow channel 101 of the control flow unit 10 again. This process is repeated, so that the diaphragm pump can continuously pump fluid.

[0108] When the diaphragm switches from the working state to the non-working state, the reset element 23A pushes the piston 22A to move towards the direction of the flow control unit 10 in the process of returning to the initial state to close the fluid passage 218A, so as to prevent the converging cavity 2142A of the pump shell 21A and the piston passage 221A of the piston 22A from being communicated, at this time, the volume of the diaphragm space 31 of the diaphragm 30 remains unchanged, the first flow control passage 101 of the flow control unit 10 is closed to prevent the dispensing cavity 213A of the pump shell 21A and the diaphragm space 31 of the diaphragm 30 from being communicated, and the second flow control passage 102 of the flow control unit 10 is closed to prevent the diaphragm space 31 of the diaphragm 30 and the converging cavity 2142A of the pump shell 21A from being communicated.

[0109] It should be understood by those skilled in the art that the above description and the embodiments of the present application shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application has been shown and explained in the embodiments, and the embodiments of the present application can be any modification or modification without departing from the principle.

Claims

1. A diaphragm pump, characterized in that, It includes a drive unit and a pump body assembly, wherein the pump body assembly includes: A diaphragm having multiple diaphragm spaces and being drivably connected to the drive device; A flow control unit having a plurality of first flow control channels and a plurality of second flow control channels, each of the first flow control channels and each of the second flow control channels being respectively capable of being opened and closed, wherein a diaphragm is fitted onto the bottom side of the flow control unit; and A pump body unit is mounted on the top side of the flow control unit. The pump body unit further includes a pump housing, a piston, and a reset element. The pump housing has an inlet channel, an outlet channel, a distribution chamber communicating with the inlet channel, a piston chamber surrounded by the distribution chamber, and at least one balancing channel communicating with the distribution chamber and the piston chamber. The piston has a piston channel and is movably disposed in the piston chamber such that the piston channel and the outlet channel are connected, thereby separating the piston chamber into a balancing chamber and a converging chamber. The balancing chamber is connected to the outlet channel via the balancing channel. The distribution chamber, wherein the reset element is disposed in the balance chamber, the opposite ends of the reset element abut against the pump housing and the piston respectively, so as to have a tendency to return the piston to its initial position after the piston moves in the piston chamber of the pump housing, the piston allowing or preventing the converging chamber and the piston channel from communicating in a vertical movement, wherein the first flow control channel of the flow control unit is configured to communicate the diaphragm space of the diaphragm and the distribution chamber of the pump housing, and the second flow control channel of the flow control unit is configured to communicate the diaphragm space of the diaphragm and the converging chamber of the pump housing; The flow control unit includes a flow control plate, at least one first flow control valve, and at least one second flow control valve. The first flow control channel and the second flow control channel are respectively formed on the flow control plate. The diaphragm and the pump housing are respectively assembled on the bottom and top of the flow control plate. The first flow control valve is deformably disposed on the bottom of the flow control plate in a manner corresponding to the diaphragm space of the diaphragm. The first flow control valve opens or closes the first flow control channel by deforming. The second flow control valve is deformably disposed on the top of the flow control plate in a manner corresponding to the converging cavity of the pump housing. The second flow control valve opens or closes the second flow control channel by deforming. The bottom surface of the piston can be attached to or separated from the second flow control valve.

2. The diaphragm pump of claim 1, wherein the flow control unit comprises a plurality of the first flow control valves, each of the first flow control valves being configured such that a portion of the first flow control channel of the flow control unit is obscured by the edge of the first flow control valve.

3. The diaphragm pump of claim 2, wherein the flow control plate has a first mounting hole, wherein the first flow control valve includes a first valve plate with deformable edges and a first mounting post integrally extending outward from the center of the first valve plate, the first mounting post being mounted in the first mounting hole of the flow control plate, wherein, from a top view, the maximum distance from the inner wall of the flow control plate forming the first flow control channel to the central axis of the first mounting hole is less than the minimum distance from the edge of the first valve plate to the central axis of the first mounting post, so as to allow the edge of the first flow control valve to obscure the first flow control channel of the flow control unit.

4. The diaphragm pump according to claim 1, wherein the flow control unit includes a second flow control valve, the second flow control valve being configured to block all the second flow control channels of the flow control unit by the edge of the second flow control valve.

5. The diaphragm pump of claim 4, wherein the flow control plate has a second mounting hole, wherein the second flow control valve includes a second valve plate with deformable edges and a second mounting post integrally extending outward from the center of the second valve plate, the second mounting post being mounted in the second mounting hole of the flow control plate, wherein, from a top view, the maximum distance from the inner wall of the flow control plate forming the second flow control channel to the central axis of the second mounting hole is less than the minimum distance from the edge of the second valve plate to the central axis of the second mounting post, so as to allow the edge of the second flow control valve to obscure the second flow control channel of the flow control unit.

6. The diaphragm pump according to claim 1, wherein the pump body unit further includes a sealing ring which is rotatably disposed between the peripheral wall of the piston and the inner wall of the pump housing.

7. The diaphragm pump according to claim 6, wherein the peripheral wall of the piston is provided with a piston groove, the height of which is greater than the thickness of the sealing ring, so as to allow the sealing ring to roll within the piston groove of the piston.

8. The diaphragm pump according to any one of claims 1 to 7, wherein the pump body unit includes a guide post having a column channel, the guide post extending integrally upward from the piston in a manner communicating with the column channel and the piston channel, wherein the top end of the guide post is provided to be movably inserted into the outlet channel of the pump housing.

9. The diaphragm pump according to any one of claims 1 to 7, wherein the pump body unit includes a guide post having a column channel, the guide post extending integrally downward from the pump housing in a manner connecting the column channel and the outlet channel, wherein the bottom end of the guide post is provided with a piston channel movably inserted into the piston.

10. A diaphragm pump, characterized in that, It includes a drive unit and a pump body assembly, wherein the pump body assembly includes: A diaphragm having multiple diaphragm spaces and being drivably connected to the drive device; A flow control unit having a plurality of first flow control channels and a plurality of second flow control channels, each of the first flow control channels and each of the second flow control channels being respectively capable of being opened and closed, wherein a diaphragm is fitted onto the bottom side of the flow control unit; and A pump body unit is mounted on the top side of the flow control unit. The pump body unit further includes a pump housing, a partition ring, a guide post, a piston, and a reset element, and has at least one balancing channel and at least one fluid channel. The pump housing has an inlet channel, an outlet channel, and a housing space. The partition ring is disposed in the housing space of the pump housing to separate the housing space into a distribution chamber and a piston chamber. The inlet channel communicates with the distribution chamber. The guide post has a cylindrical space and extends from the pump housing to the piston chamber in a manner that connects the cylindrical space and the outlet channel. The piston is movably disposed in the piston chamber by being fitted onto the guide post to separate the... The piston chamber comprises a balancing chamber and a converging chamber. The balancing chamber is connected to the distribution chamber via the balancing channel, and the converging chamber is connected to the column channel of the guide column via the fluid channel. A reset element is disposed in the balancing chamber, with its opposite ends abutting against the pump housing and the piston, respectively, to tend to return the piston to its initial position after the piston moves within the piston chamber. The piston opens or closes the fluid channel by moving up and down. The first flow control channel of the flow control unit is configured to connect the diaphragm space of the diaphragm and the distribution chamber of the pump housing, and the second flow control channel of the flow control unit is configured to connect the diaphragm space of the diaphragm and the converging chamber of the pump housing. The flow control unit includes a flow control plate, at least one first flow control valve, and at least one second flow control valve. The first flow control channel and the second flow control channel are formed in the flow control plate. The diaphragm is assembled at the bottom of the flow control plate. The pump housing and the partition ring are disposed at the top of the flow control plate. The first flow control valve is deformably disposed at the bottom of the flow control plate in a manner corresponding to the diaphragm space of the diaphragm. The first flow control valve opens or closes the first flow control channel by deforming. The second flow control valve is deformably disposed at the top of the flow control plate in a manner corresponding to the converging cavity of the pump housing. The second flow control valve opens or closes the second flow control channel by deforming.

11. The diaphragm pump of claim 10, wherein the flow control unit includes a plurality of the first flow control valves, each of the first flow control valves being configured such that a portion of the first flow control channel of the flow control unit is obscured by an edge of the first flow control valve.

12. The diaphragm pump of claim 10, wherein the flow control unit includes a second flow control valve, the second flow control valve being configured to block all the second flow control channels of the flow control unit by the edge of the second flow control valve.

13. The diaphragm pump according to any one of claims 10 to 12, wherein the balancing channel of the pump body unit is formed in the partition ring; or the balancing channel of the pump body unit is formed between the partition ring and the pump casing.

14. The diaphragm pump according to any one of claims 10 to 12, wherein the fluid passage of the pump body unit is formed on the guide post; or the fluid passage of the pump body unit is formed between the guide post and the flow control unit.

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