A bidirectional diaphragm pump

Abstract

The application discloses a bidirectional diaphragm pump, comprising a pump one and a pump two, wherein the pump one and the pump two are respectively provided with a first booster cavity and a second booster cavity, the pump one and the pump two are connected in airtight mode with a pump head body and a support frame, the pump head body is provided with a first water port, a second water port and a first water outlet cavity, the support frame is provided with a second water outlet cavity, the first water port and the second water port are respectively connected with the first booster cavity and the second booster cavity, the first booster cavity and the second booster cavity are respectively connected with the first water outlet cavity and the second water outlet cavity, a water sealing sleeve ring one is formed on a water channel connected with the first water outlet cavity and the second water port, a water sealing sleeve ring two is formed on a water channel connected with the second water outlet cavity and the first water port, and a flow control assembly for alternately controlling the water sealing sleeve ring one and the water sealing sleeve ring two to seal or conduct the water channel is arranged between the first water outlet cavity and the second water outlet cavity. The application does not need to increase additional accessories on the water channel, the corresponding pipeline design is simpler, the cost is controlled, and the applicability is stronger.

Description

Technical Field

[0001] This invention relates to the field of fluid transport technology, and more specifically to a bidirectional diaphragm pump. Background Technology

[0002] Diaphragm pumps are widely used in our daily lives. Diaphragm pumps have a simple structure. Currently, diaphragm pumps mainly rely on a motor to drive an eccentric component to rotate. The eccentric component drives a pusher to swing. The pusher is connected to the pressure-sensitive diaphragm that forms the pressurization chamber. This allows the volume of the pressurization chamber to be expanded or squeezed, thus drawing water in or pumping it out.

[0003] Diaphragm pumps are often used in conjunction with heating units in drinking water systems to pump hot water from the heating unit to the faucet. However, when the faucet is turned off, the water in the water path between the diaphragm pump and the faucet remains stagnant for a long time, and its temperature drops to room temperature. As a result, when the faucet is turned on again, some room temperature water will come out first, and then the hot water will come out, which is a poor user experience. Therefore, existing technologies add additional components to the water path between the diaphragm pump and the faucet, and use circuit control to deliver room temperature water to the heating unit, so that there is no excess water in the water path between the diaphragm pump and the faucet. However, this design increases the number of components in the entire drinking water system, makes the piping design more complex, increases the cost accordingly, and has poor applicability. Summary of the Invention

[0004] The purpose of this invention is to provide a bidirectional diaphragm pump to solve the problems in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A bidirectional diaphragm pump includes a pump 1 and a pump 2. Pump 1 and pump 2 are respectively provided with a first pressurization chamber and a second pressurization chamber. Pump 1 and pump 2 are connected in a sealed manner by a suitable pump head body and a support frame. The pump head body is provided with a first water inlet, a second water inlet, and a first water outlet chamber. The support frame is provided with a second water outlet chamber. The first water inlet and the second water inlet are respectively connected to the first pressurization chamber and the second pressurization chamber through an inlet one-way valve and an inlet one-way diaphragm. The first pressurization chamber and the second pressurization chamber are respectively connected to the first water outlet chamber and the second water inlet through an outlet one-way valve and an outlet one-way diaphragm. A water sealing ring 1 is formed on the water path connecting the first water outlet chamber and the second water inlet. A water sealing ring 2 is formed on the water path connecting the second water outlet chamber and the first water inlet. A flow control component is provided on the water path between the first water outlet chamber and the second water outlet chamber to alternately control the sealing or opening of the water path at the water sealing ring 1 and the water sealing ring 2.

[0007] Optionally, the flow control assembly includes a pressure sensing element and a return spring. The pressure sensing element and the support frame form a third water outlet chamber that communicates with the first water inlet. The return spring is located in the third water outlet chamber, with one end acting on the pressure sensing element and the other end acting on the support frame. Under the combined action of the pressure in the first water outlet chamber, the pressure in the second water outlet chamber, the third water outlet chamber, and the return spring, the pressure sensing element constitutes a flow control assembly that alternately controls the sealing or opening of the water passages at the first and second sealing rings.

[0008] Optionally, the pressure-sensing component includes a pressure-sensing diaphragm and a flow-blocking plug. The flow-blocking plug has a flow-limiting groove on its side wall. The pressure-sensing diaphragm is disposed around the flow-blocking plug and is integrally formed with the flow-blocking plug. The pressure-sensing diaphragm is circumferentially sealed and pressed between the support frame and the pump head body. The pressure-sensing diaphragm is circumferentially provided with a first flow channel and a second flow channel that connect to the first water inlet and the second water inlet, respectively. The two ends of the flow-blocking plug are slidably connected to the pump head body and the support frame, respectively. Under the combined action of the pressure in the first water outlet chamber, the pressure in the second water outlet chamber, and the return spring, the flow-blocking plug moves up and down with the pressure-sensing diaphragm to alternately control the sealing or opening of the water passages at the first and second sealing rings.

[0009] Optionally, the second water outlet cavity is located in the middle of the support frame, and the middle of the support frame is provided with an upward extension section. The extension section is provided with a first water passage hole that communicates with the second water outlet cavity. The sealing sleeve is provided with a second water passage hole that communicates with the second water outlet cavity and the third water outlet cavity. The support frame is provided with a third water passage hole that communicates with the third water outlet cavity and the first water outlet.

[0010] Optionally, the pump head body is provided with a first water inlet chamber that communicates with the first water inlet, and the support frame is provided with a second water inlet chamber that communicates with the second water inlet.

[0011] Optionally, the pump includes a first partition, a first support sleeve, a first eccentric assembly, and a first pressurizing diaphragm forming a first pressurizing chamber. The lower end of the first eccentric assembly is connected to a first motor. The first pressurizing diaphragm is circumferentially pressed and sealed between the first partition and the first support sleeve. The middle part of the first pressurizing diaphragm is pressed against the first partition by a pressure block in the middle of the first support sleeve. A first high-pressure chamber is formed between the first partition and the support frame. The pump head body is provided with a fourth water passage hole that connects the first water outlet chamber and the first high-pressure chamber. The first partition is also provided with an inlet one-way valve. The inlet one-way valve is provided with a first water inlet hole located on the first partition, and the outlet one-way valve is provided with a first water outlet hole located on the first partition.

[0012] Optionally, a rotating magnetic assembly for transmitting power is provided between the first eccentric assembly and the first motor. The rotating magnetic assembly includes a bracket, a driving magnetic ring, a driven magnetic ring, and a rotating shaft. The bracket is circumferentially pressed between the first support sleeve and the first motor. The middle part of the bracket is concave downward to form a continuous primary cavity and a secondary cavity. An eccentric seat is provided in the primary cavity. The eccentric seat is rotatably connected to the rotating shaft. The rotating shaft is connected to the first eccentric assembly. The driven magnetic ring is sleeved on the eccentric seat. A rotating seat connected to the output shaft of the first motor is provided below the secondary cavity. The driving magnetic ring is sleeved on the rotating seat. The driving magnetic ring corresponds to the driven magnetic ring.

[0013] Optionally, a first sealing ring is pressed between the first partition and the pump head body, and a second sealing ring is pressed between the first partition and the pump head body in the circumferential direction.

[0014] Optionally, the second pump includes a second partition, a second support sleeve, a second eccentric assembly, and a second pressurizing diaphragm constituting the second pressurizing chamber. The upper end of the second eccentric assembly is connected to a second motor. The second pressurizing diaphragm is circumferentially pressed and sealed between the second partition and the second support sleeve. The middle part of the second pressurizing diaphragm is pressed against the second partition by a pressure block. The second partition is provided with an inlet unidirectional diaphragm and an outlet unidirectional diaphragm pressed between the second partition and the support frame. The inlet unidirectional diaphragm and the outlet unidirectional diaphragm are respectively provided with a second inlet hole and a second outlet hole.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. In this invention, two diaphragm pumps are combined to form a bidirectional diaphragm pump. The bidirectional diaphragm pump has two inlets: a first inlet for water intake and a second inlet for water return. Pump 1 operates first, drawing water from the source tank into the first pressurization chamber through the first inlet, and then pumping it to the first outlet chamber. The flow control component then controls the water in the first outlet chamber to enter the second inlet, where it is heated and delivered to the faucet. When the faucet is closed, pump 1 stops operating, and pump 2 starts, drawing water from the faucet tip into the second pressurization chamber through the second inlet, and then pumping it to the second outlet chamber. The flow control component then controls the water in the second outlet chamber to enter the third outlet chamber and deliver it to the first inlet, returning to the source tank. This ensures that there is no excess water in the water path between the second inlet and the faucet. When the bidirectional diaphragm pump pumps hot water to the faucet, there will be no initial portion of room temperature water, resulting in a better user experience. Furthermore, no additional accessories are needed in the water path between the second inlet and the faucet, simplifying the piping design, controlling costs, and enhancing applicability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Reference numerals: 01-First water inlet, 02-Fourth water passage, 03-First water outlet chamber, 04-First flow channel, 05-Pressure-sensing diaphragm, 06-Third water passage, 07-Third water outlet chamber, 08-Second water passage, 09-First water passage, 10-Second outer shell, 11-Second eccentric assembly, 12-Second motor, 13-Second pressurizing diaphragm, 14-Pressure block, 15-Second partition plate, 16-Second water outlet, 17-One-way water outlet diaphragm, 18-Second pressurizing chamber, 19-Second water inlet, 20-One-way water inlet diaphragm, 21-Second water inlet chamber, 22-Support frame, 23-Reset spring, 24-Flow blocking plug, 25-Sealing ring one, 26-Second water outlet chamber, 27-Second flow channel, 2 8-Second water inlet, 29-Flow limiting groove, 30-Pump head body, 31-First sealing ring, 32-Second sealing ring, 33-First high-pressure chamber, 34-First support sleeve, 35-First partition plate, 36-First outer shell, 37-First motor, 38-First eccentric assembly, 39-First pressurizing diaphragm, 40-First pressurizing chamber, 41-First water outlet, 42-Water outlet one-way valve, 43-Water inlet one-way valve, 44-First water inlet, 45-First water inlet chamber, 46-Rotating seat, 47-Drive magnetic ring, 48-Driven magnetic ring, 49-Eccentric seat, 50-Second high-pressure chamber, 51-Bracket, 52-First-stage concave cavity, 53-Second-stage concave cavity, 54-Second sealing ring, 55-Second support sleeve. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1

[0024] A bidirectional diaphragm pump includes a pump one and a pump two. Pump one and pump two are respectively provided with a first pressurization chamber 40 and a second pressurization chamber 18. A suitable pump head body 30 and a support frame 22 are hermetically connected between pump one and pump two. Pump head body 30 is provided with a first water inlet 01, a second water inlet 28, and a first water outlet chamber 03. Support frame 22 is provided with a second water outlet chamber 26. The first water inlet 01 and the second water inlet 28 are respectively connected to the first pressurization chamber 40 and the second pressurization chamber 18 through an inlet one-way valve 43 and an inlet one-way diaphragm 20, respectively. The booster chamber 40 and the second booster chamber 18 are respectively connected to the first outlet chamber 03 and the second outlet chamber 26 through the outlet one-way valve 42 and the outlet one-way diaphragm 17. A water sealing ring 1 25 is formed on the water path connecting the first outlet chamber 03 and the second water outlet 28, and a water sealing ring 2 54 is formed on the water path connecting the second outlet chamber 26 and the first water outlet 01. A flow control component is provided on the water path between the first outlet chamber 03 and the second outlet chamber 26 to alternately control the sealing or opening of the water path at the water sealing ring 1 25 and the water sealing ring 2 54.

[0025] In this embodiment, as Figure 1 and 2As shown, this bidirectional diaphragm pump can be used with source water accessories or heating units. In this embodiment, it is used with a heating unit as an example. The bidirectional diaphragm pump consists of pump one and pump two. The two pumps are sealed together by a support frame 22 and a pump head body 30. Both pump one and pump two are diaphragm pumps. Pump one is located below pump two. The pump head body 30 has a first water inlet 01, a second water inlet 28, and a first water outlet chamber 03. The first water outlet chamber 03 and the first water inlet 01 are connected by an inlet one-way valve 43 and an outlet one-way valve 42. The support frame 22 is sealed above the pump head body 30. The unit has a second water outlet chamber 26 formed by its own mechanism. The second water outlet chamber 26 is directly connected to the first water outlet 01. The second water outlet chamber 26 and the second water outlet 28 are connected by a water inlet one-way diaphragm 20 and a water outlet one-way diaphragm 17. A water sealing ring 1 25 is formed on the water path connecting the first water outlet chamber 03 and the second water outlet 28. A water sealing ring 24 is formed on the water path connecting the second water outlet chamber 26 and the first water outlet 01. A flow control component is provided on the water path between the first water outlet chamber 03 and the second water outlet chamber 26 to alternately control the sealing or opening of the water path at the water sealing ring 1 25 and the water sealing ring 2 54.

[0026] During operation, taking the first water inlet 01 as the water inlet and the second water inlet 28 as the water return as an example, the first water inlet 01 is connected to the source water tank (not shown in the figure) in the drinking water system. The source water tank, taking the heating unit as an example, is used to receive hot water, and the second water inlet 28 is used to connect to the faucet (not shown in the figure). Pump 1 operates first. At this time, the water passage at the sealing ring 2 (54) is closed, and the hot water at the first water inlet (01) cannot enter the second outlet chamber (26). Pump 1 draws the hot water from the heating unit from the first water inlet (01) and through the inlet check valve (43) into the first pressurization chamber (40). The first pressurization chamber (40) compresses the hot water and pumps it through the outlet check valve (42) to the first outlet chamber (03). Then, the flow control component controls the water passage at the sealing ring 25 to open, allowing the hot water in the first outlet chamber (03) to enter the second water inlet (28) and be delivered to the faucet. When the faucet is closed, Pump 1 stops, and Pump 2 starts operating. At this time, the water passage at the sealing ring 25 is closed, drawing water between the second water inlet (28) and the faucet from the second water inlet (28) and through the inlet check diaphragm (20) into the second pressurization chamber (18). The second pressurization chamber (18) compresses the water and pumps it through the outlet check diaphragm (17) to the second outlet chamber (26). Then, the flow control component controls the water passage at the sealing ring 25 to open, allowing the hot water in the first outlet chamber (03) to enter the second water inlet (28) and be delivered to the faucet. The water circuit at the sealing ring 54 of the component is connected, and the hot water in the second outlet chamber 26 enters the third outlet chamber 07 and is transported to the first water inlet 01, returning to the heating unit. In this way, pump one and pump two operate alternately, so that there is no excess water in the water circuit between the second water inlet 28 and the faucet, and no stagnant water is formed. The next time the faucet is turned on, the bidirectional diaphragm pump directly pumps the hot water from the heating unit to the faucet, without first releasing a portion of room temperature water. When the source water fitting is connected to the first water inlet 01, it becomes a direct pumping of clean source water to the faucet, so that the water coming out after the faucet has been closed for a long time will not be stagnant water, resulting in a better user experience. It also avoids adding extra fittings (such as solenoid valves, water pumps, tees, etc.) to the water circuit between the second water inlet 28 and the faucet, and correspondingly avoids designing complex pipelines to accommodate fittings, thus controlling costs and making it highly applicable.

[0027] Furthermore, the flow control component includes a pressure sensing element and a return spring 23. The pressure sensing element and the support frame 22 form a third water outlet cavity 07 that is connected to the first water outlet 01. The return spring 23 is located in the third water outlet cavity 07, with one end acting on the pressure sensing element and the other end acting on the support frame 22. Under the combined action of the pressure in the first water outlet cavity 03, the pressure in the second water outlet cavity 26, the third water outlet cavity 07, and the return spring 23, the pressure sensing element constitutes a flow control component that alternately controls the sealing or opening of the water passage at the sealing ring 1 25 and the sealing ring 2 54.

[0028] Specifically, the flow control assembly mainly includes a pressure sensor and a return spring 23. The pressure sensor is circumferentially pressed between the pump head body 30 and the support frame 22, and simultaneously provides a sealing function for the assembly between the pump head body 30 and the support frame 22. The middle part of the pressure sensor and the support frame 22 form a third water outlet chamber 07, and the middle part of the pressure sensor and the inner wall of the pump head body 30 form a first water outlet chamber 03. The return spring 23 is located in the third water outlet chamber 07, with one end acting on the pressure sensor and the other end acting on the inner wall of the support frame 22. When the pump is working, the water pressure in the first water outlet chamber 03 overcomes the elastic force of the return spring 23 and the pressure in the third water outlet chamber 07, pushing the pressure sensor upward, thus opening the water passage at the sealing ring 25 and closing the water passage at the sealing ring 54. The pump then opens the first water outlet chamber 03. Water is transported through the sealing ring 25 to the second outlet 28, allowing hot water to be dispensed when the faucet is turned on. When the faucet is closed, pump 1 stops and pump 2 starts working. The hot water at the second outlet 28 is drawn into the second pressurization chamber 18 and then pumped to the second outlet chamber 26. The internal pressure of the second outlet chamber 26, combined with the return spring 23, overcomes the internal pressure of the first outlet chamber 03, pressing the pressure sensing element downwards. This connects the water passage at the sealing ring 54 and closes the water passage at the sealing ring 25. The water in the second outlet chamber 26 enters the third outlet chamber 07 and is then transported to the first outlet 01, returning to the heating unit. This ensures that there is no excess water between the second outlet 28 and the faucet, so that when the faucet is turned on next time, there will be no unheated water.

[0029] Furthermore, the pressure-sensing component includes a pressure-sensing diaphragm 05 and a flow-blocking plug 24. The flow-blocking plug 24 has a flow-limiting groove 29 on its side wall. The pressure-sensing diaphragm 05 is disposed around the flow-blocking plug 24 and is integrally formed with the flow-blocking plug 24. The pressure-sensing diaphragm 05 is circumferentially sealed and pressed between the support frame 22 and the pump head body 30. The pressure-sensing diaphragm 05 is circumferentially provided with a first flow channel 04 and a second flow channel 27 that connect to the first water inlet 01 and the second water inlet 28, respectively. The two ends of the flow-blocking plug 24 are slidably connected to the pump head body 30 and the support frame 22, respectively. Under the combined action of the pressure in the first water outlet chamber 03, the pressure in the second water outlet chamber 26, and the return spring 23, the flow-blocking plug 24 moves up and down with the pressure-sensing diaphragm 05 to alternately control the water passage sealing or conduction at the sealing ring 1 25 and the sealing ring 2 54.

[0030] Specifically, the pressure-sensing component is actually composed of a pressure-sensing diaphragm 05 and a flow-blocking plug 24. The flow-blocking plug 24 is a rubber column. The pressure-sensing diaphragm 05 is integrally formed around the flow-blocking plug 24. The pressure-sensing diaphragm 05 is circumferentially pressed and sealed between the pump head body 30 and the support frame 22. The pressure-sensing diaphragm 05 is also provided with a first flow channel 04 and a second flow channel 27 in its circumferential direction. The first flow channel 04 connects to the first water inlet 01 and the third water outlet chamber 07. The second flow channel 27 connects to the second water inlet 28. The upper end of the flow-blocking plug 24 is slidably sleeved in the second water outlet chamber 26 within the pump head body 30. A sliding cavity is provided that connects to the second water inlet 28. The lower end of the flow-blocking plug 24 is slidably sleeved in this sliding cavity. A flow-limiting groove 29 is provided on the side of the lower end of the flow-blocking plug 24. When the pump is working, the water pressure in the first outlet chamber 03 overcomes the elastic force of the return spring 23 and the pressure in the third outlet chamber 07, pushing the pressure-sensing diaphragm 05 upward. The flow-blocking plug 24 moves upward along with it, causing the pressure-sensing diaphragm 05 to disengage from the sealing ring 25. When the upper end of the flow-limiting groove 29 exceeds the top of the sealing ring 25, the water passage at the sealing ring 25 is connected, and the sealing ring... When the water passage at point 54 of ring 2 is closed, pump 1 transports the water in the first outlet chamber 03 through the sealing ring 25 and the flow-limiting groove 29 to the sliding chamber, and then flows to the second outlet 28. Hot water can be dispensed when the faucet is turned on. The more the upper end of the flow-limiting groove 29 extends beyond the top of the sealing ring 25, the more water flows from the faucet, and vice versa. After the faucet is closed, pump 2 starts working, and the hot water at the second outlet 28 is drawn into the second pressurization chamber 18, and then pumped to the second outlet chamber 26. The internal pressure of the second outlet chamber 26, combined with the return spring 23, overcomes the first... The pressure inside the water outlet chamber 03 pushes the pressure-sensing diaphragm 05 downward, thus connecting the water passage at the sealing ring 24. The pressure-sensing diaphragm 05 drives the flow-blocking plug 24 to move downward, pressing the pressure-sensing diaphragm 05 tightly against the water outlet of the sealing ring 25, thus sealing the water passage at the sealing ring 25. The water in the second water outlet chamber 26 enters the third water outlet chamber 07 and is then transported to the first water outlet 01, returning to the heating unit. This ensures that there is no excess water between the second water outlet 28 and the faucet, so that when the faucet is turned on next time, there will be no unheated water.

[0031] Furthermore, the second water outlet chamber 26 is located in the middle of the support frame 22. The support frame 22 has an upward extension section in the middle, and the extension section has a first water passage hole 09 that communicates with the second water outlet chamber 26. The sealing ring 54 has a second water passage hole 08 that communicates with the second water outlet chamber 26 and the third water outlet chamber 07. The support frame 22 has a third water passage hole 06 that communicates with the third water outlet chamber 07 and the first water outlet 01.

[0032] Specifically, an upward extension section is provided in the middle of the support frame 22. The one-way diaphragm 17 is pressed against the upper end of the extension section. The extension section is provided with a first water passage hole 09 that connects to the second water outlet chamber 26. A second water passage hole 08 is provided on the lower side wall of the sealing ring 24. When the flow block 24 is not moved upward, the second water passage hole 08 connects the water passage between the second water outlet chamber 26 and the third water outlet chamber 07. After the flow block 24 moves upward until the upper end of the flow block 24 exceeds the first water passage hole 09, the water passage between the second water outlet chamber 26 and the third water outlet chamber 07 is closed, that is, the water passage at the sealing ring 24 is closed. A third water passage hole 06 is provided on the inner wall of the support frame 22 (the side wall of the third water outlet chamber 07) that connects the third water outlet chamber 07 and the first water outlet 01. The water in the third water outlet chamber 07 directly returns to the first water outlet 01 through the third water passage hole 06 and the first flow channel 04.

[0033] Furthermore, the pump head body 30 is provided with a first water inlet chamber 45 that communicates with the first water inlet 01, and the support frame 22 is provided with a second water inlet chamber 21 that communicates with the second water inlet 28.

[0034] Specifically, the first water inlet chamber 45 is used to connect to the first water outlet 01 and transport water to the first pressurization chamber 40, while the second water inlet chamber 21 is used to return the water from the second water outlet 28 to the second pressurization chamber 18.

[0035] Furthermore, the pump includes a first partition plate 35, a first support sleeve 34, a first eccentric assembly 38, and a first pressurizing diaphragm 39 constituting a first pressurizing chamber 40. The lower end of the first eccentric assembly 38 is connected to a first motor 37. The first pressurizing diaphragm 39 is circumferentially pressed and sealed between the first partition plate 35 and the first support sleeve 34. The middle part of the first pressurizing diaphragm 39 is pressed onto the first partition plate 35 by a pressure block 14. A first high-pressure chamber 33 is formed between the first partition plate 35 and the support frame 22. A fourth water passage hole 02 is provided inside the pump head body 30 to connect the first water outlet chamber 03 and the first high-pressure chamber 33. The first partition plate 35 is also provided with an inlet one-way valve 43. The inlet one-way valve 43 is provided with a first water inlet hole 44 located on the first partition plate 35. The outlet one-way valve 42 is provided with a first water outlet hole 41 located on the first partition plate 35.

[0036] Furthermore, a rotating magnetic assembly for transmitting power is provided between the first eccentric component 38 and the first motor 37. The rotating magnetic assembly includes a bracket 51, a driving magnetic ring 47, a driven magnetic ring 48, and a rotating shaft. The bracket 51 is circumferentially pressed between the first support sleeve 34 and the first motor 37. The middle part of the bracket 51 is concave downward to form a continuous primary cavity 52 and a secondary cavity 53. An eccentric seat 49 is provided in the primary cavity 52. ​​The eccentric seat 49 is rotatably connected to the rotating shaft. The rotating shaft is connected to the first eccentric component 38. The driven magnetic ring 48 is sleeved on the eccentric seat 49. A rotating seat 46 connected to the output shaft of the first motor 37 is provided below the secondary cavity 53. The driving magnetic ring 47 is sleeved on the rotating seat 46. The driving magnetic ring 47 corresponds to the driven magnetic ring 48.

[0037] Specifically, pump 1 adopts a rotary magnetic diaphragm pump, which is an existing type of diaphragm pump. The first eccentric component 38 inside is also a commonly used component in existing diaphragm pumps. The bracket 51 is circumferentially adapted and sealed between the first support sleeve 34 and the first outer shell 36. The bracket 51 is an irregular structure with a downward recess in its middle position to form two concave cavities. The two concave cavities are distributed in a stepped manner. The size of the first-level concave cavity 52 is larger than the size of the second-level concave cavity 53. The eccentric seat 49 is installed in the first-level concave cavity 52. ​​The lower center of the eccentric seat 49 is connected to a rotating shaft. A driven magnetic ring 48 is sleeved on the outside of the eccentric seat 49. There is a gap between the side wall of the driven magnetic ring 48 and the inner wall of the first-level concave cavity 52. ​​The first eccentric component 38 is connected to the eccentric position on the eccentric seat 49. The first eccentric component 38 is a commonly used component in diaphragm pumps and belongs to existing technology. The rotation of the eccentric seat 49 causes the first eccentric component to rotate, thereby pulling and squeezing the first pressurizing chamber 40, so that the first pressurizing chamber 40 can achieve the function of water intake and pumping. A rotating seat 46 is provided below the secondary cavity 53. The rotating seat 46 has a U-shaped structure, which wraps around the outside of the secondary cavity 53 but does not contact the side wall of the secondary cavity 53. The lower end of the rotating seat 46 is fixedly connected to the output shaft of the first motor 37. A driving magnetic ring 47 is sleeved on the outside of the rotating seat 46. When the first motor 37 is activated, it drives the rotating seat 46 and the driving magnetic ring 47 to rotate synchronously. The driven magnetic ring 48 has the opposite polarity to the driving magnetic ring 47, so the rotation of the driving magnetic ring 47 can drive the driven magnetic ring 48 to rotate. The driven magnetic ring 48 is fixed on the bias. On the core seat 49, the eccentric seat 49 is driven to rotate, and the eccentric seat 49 in turn drives the first eccentric component 38 to rotate, thereby achieving the effect of pulling and squeezing the pressurizing chamber. In this solution, the bracket 51 is used to completely isolate the first motor 37 from the water channel structure above. The output shaft of the first motor 37 does not need to be directly connected to the second eccentric component 11, so that water above the bracket 51 cannot enter the first motor 37 below. This greatly reduces the risk of water entering the motor, which is beneficial to protecting the first motor 37 and extending its service life.

[0038] Furthermore, a first sealing ring 31 is pressed between the first partition 35 and the pump head body 30, and a second sealing ring 32 is pressed between the first partition 35 and the pump head body 30 in the circumferential direction.

[0039] Specifically, the first sealing ring 31 is used to improve the sealing performance between the upper end of the first partition 35 and the pump head body 30, and to prevent the water passage between the first water inlet chamber 45 and the first high pressure chamber 33 from being connected. The second sealing ring 32 is used to improve the sealing performance between the first partition 35 and the pump head body 30 in the circumferential direction, and to prevent water leakage.

[0040] Furthermore, the second pump includes a second partition plate 15, a second support sleeve 55, a second eccentric assembly 11, and a second pressurizing diaphragm 13 constituting the second pressurizing chamber 18. The upper end of the second eccentric assembly 11 is connected to a second motor 12. The second pressurizing diaphragm 13 is circumferentially pressed and sealed between the second partition plate 15 and the second support sleeve 55. The middle part of the second pressurizing diaphragm 13 is pressed onto the second partition plate 15 by a pressure block 14. The second partition plate 15 is provided with an inlet one-way diaphragm 20 and an outlet one-way diaphragm 17 pressed between the second partition plate 15 and the support frame 22. The inlet one-way diaphragm 20 and the outlet one-way diaphragm 17 are respectively provided with a second inlet hole 19 and a second outlet hole 16.

[0041] Specifically, the second pump in this embodiment is a conventional diaphragm pump. The second eccentric component 11 has the same structure and working principle as the first eccentric component 38. The second motor 12 drives the second eccentric component 11 to rotate eccentrically, thereby pulling or squeezing the cavity of the second pressurizing chamber 18, thereby drawing water from the second inlet chamber 21 into the second pressurizing chamber 18 and pumping it into the second high-pressure chamber 50. Finally, it enters the first outlet chamber 03 through the first water passage 09.

[0042] The working principle of this invention is as follows: the first inlet 01 of the bidirectional diaphragm pump is connected to the heating unit of the drinking water system (an existing component in the drinking water system), and the second inlet 28 is connected to the faucet. When the faucet is turned on, the pump starts to work. The first motor 37 drives the first eccentric component 38 to rotate eccentrically, pulling the first pressurization chamber 40, increasing its volume, and drawing hot water from the first inlet 01 into the first inlet chamber 45. The hot water then enters the first pressurization chamber 40 through the first inlet hole 44 and the inlet one-way valve 43. The eccentric rotation of the first eccentric component 38 compresses the first pressurization chamber 40, pumping the hot water in the first pressurization chamber 40 through the first outlet hole 41 and the outlet one-way valve 42 to the first high-pressure chamber 33, and then through the fourth water passage hole 02 into the first outlet chamber 03. The water pressure in the first outlet chamber 03 overcomes the reset. The elastic force of spring 23 and the pressure inside the third water outlet chamber 07 push the pressure-sensing diaphragm 05 upward, and the flow-blocking plug 24 moves upward along with it, causing the pressure-sensing diaphragm 05 to disengage from the sealing ring 25. When the upper end of the flow-limiting groove 29 exceeds the top of the sealing ring 25, the water passage at the sealing ring 25 is connected. The upward movement of the flow-blocking plug 24 causes the upper end of the flow-blocking plug 24 to seal the second water passage 08, and the water passage at the sealing ring 24 is closed. At this time, hot water cannot enter the second water outlet chamber 26 through the third water outlet chamber 07. Pump 1 transports the water in the first water outlet chamber 03 through the sealing ring 25 and the flow-limiting groove 29 to the sliding chamber, and then flows to the second water outlet 28. Hot water can be released when the faucet is turned on. The more the upper end of the flow-limiting groove 29 exceeds the top of the sealing ring 25, the more water flows out of the faucet, and vice versa.After the faucet is turned off, pump two starts working. The second motor 12 drives the second eccentric component 11 to rotate eccentrically, pulling the second pressurizing chamber 18 and increasing its internal volume. This causes the hot water at the second water outlet 28 to be drawn into the second pressurizing chamber 18 through the second flow channel 27, the second water inlet chamber 21, the second water inlet hole 19, and the inlet one-way diaphragm 20. When the second pressurizing chamber 18 is squeezed, its internal volume decreases. Then, the hot water in the second pressurizing chamber 18 is pumped to the second high-pressure chamber 50 through the second water outlet hole 16 and the outlet one-way diaphragm 17, and then enters the second water outlet chamber 26 through the first water passage hole 09. The internal pressure of the second water outlet chamber 26, combined with the return spring 23, overcomes the internal pressure of the first water outlet chamber 03, pressing the pressure-sensing diaphragm 05 downward. The flow-blocking plug 24 moves downward accordingly, releasing the seal on the second water passage hole 08. The second water outlet chamber 26 is connected to the third water outlet chamber 07, thus opening the water passage at the sealing ring 24. When the circuit is connected, the pressure-sensing diaphragm 05 moves the flow-blocking plug 24 downwards, pressing the pressure-sensing diaphragm 05 against the water inlet of the sealing ring 25. This seals the water passage at the sealing ring 25, preventing water from the second water inlet 28 from flowing from the sealing ring 25 into the first outlet chamber 03. The water in the second outlet chamber 26 enters the third outlet chamber 07, then passes through the third water passage 06 and the first flow channel 04 before being transported back to the first water inlet 01, returning to the heating unit. This ensures that there is no excess water between the second water inlet 28 and the faucet, so that when the faucet is turned on next time, there will be no unheated water. This alternating connection and closure of the water passages at the sealing rings 25 and 254 eliminates the need for additional components to achieve the return of residual hot water between the second water inlet 28 and the faucet, reducing piping design, lowering costs, and increasing applicability.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A bidirectional diaphragm pump, comprising a pump one and a pump two, wherein a first pressurizing chamber (40) and a second pressurizing chamber (18) are respectively provided in the pump one and pump two, characterized in that, Pump 1 and Pump 2 are connected in a sealed manner by a suitable pump head body (30) and a support frame (22). The pump head body (30) is provided with a first water inlet (01), a second water inlet (28), and a first water outlet chamber (03). The support frame (22) is provided with a second water outlet chamber (26). The first water inlet (01) and the second water inlet (28) are respectively connected to the first pressurization chamber (40) and the second pressurization chamber (18) through the inlet one-way valve (43) and the inlet one-way diaphragm (20). The first pressurization chamber (40) and the second pressurization chamber (18) are respectively connected through the water outlet. One-way valve disc (42) and outlet one-way diaphragm (17) are connected to the first outlet chamber (03) and the second outlet chamber (26). A sealing ring one (25) is formed on the water path connecting the first outlet chamber (03) and the second water outlet (28). A sealing ring two (54) is formed on the water path connecting the second outlet chamber (26) and the first water outlet (01). A flow control component is provided on the water path between the first outlet chamber (03) and the second outlet chamber (26) to alternately control the sealing or opening of the water path at the sealing ring one (25) and the sealing ring two (54). The flow control component includes a pressure sensing element and a return spring (23). The pressure sensing element and the support frame (22) form a third water outlet chamber (07) that is connected to the first water outlet (01). The return spring (23) is located in the third water outlet chamber (07), with one end acting on the pressure sensing element and the other end acting on the support frame (22). The pressure sensing element, under the combined action of the pressure in the first water outlet chamber (03), the pressure in the second water outlet chamber (26), the pressure in the third water outlet chamber (07), and the return spring (23), constitutes a flow control component that alternately controls the sealing or opening of the water passage at the first sealing ring (25) and the second sealing ring (54). The pressure-sensing component includes a pressure-sensing diaphragm (05) and a flow-blocking plug (24). The flow-blocking plug (24) has a flow-limiting groove (29) on its side wall. The pressure-sensing diaphragm (05) is arranged around the flow-blocking plug (24) and is integrally formed with the flow-blocking plug (24). The pressure-sensing diaphragm (05) is circumferentially sealed and pressed between the support frame (22) and the pump head body (30). The pressure-sensing diaphragm (05) is circumferentially provided with a first flow channel (04) and a second flow channel (27) that connect to the first water inlet (01) and the second water inlet (28). The two ends of the flow-blocking plug (24) are slidably connected to the pump head body (30) and the support frame (22), respectively. Under the combined action of the pressure in the first water outlet chamber (03), the pressure in the second water outlet chamber (26) and the return spring (23), the flow-blocking plug (24) moves up and down with the pressure-sensing diaphragm (05) to alternately control the water passage sealing or conduction at the first sealing ring (25) and the second sealing ring (54).

2. The bidirectional diaphragm pump according to claim 1, characterized in that, The second water outlet cavity (26) is located in the middle of the support frame (22). The support frame (22) has an upward extension section in the middle. The extension section has a first water passage hole (09) that connects to the second water outlet cavity (26). The sealing ring (54) has a second water passage hole (08) that connects to the second water outlet cavity (26) and the third water outlet cavity (07). The support frame (22) has a third water passage hole (06) that connects to the third water outlet cavity (07) and the first water outlet (01).

3. A bidirectional diaphragm pump according to claim 1, characterized in that, The pump head body (30) is provided with a first water inlet chamber (45) that is connected to the first water inlet (01), and the support frame (22) is provided with a second water inlet chamber (21) that is connected to the second water inlet (28).

4. A bidirectional diaphragm pump according to claim 1, characterized in that, The pump includes a first partition (35), a first support sleeve (34), a first eccentric assembly (38), and a first pressurizing diaphragm (39) constituting a first pressurizing chamber (40). The lower end of the first eccentric assembly (38) is connected to a first motor (37). The first pressurizing diaphragm (39) is circumferentially pressed and sealed between the first partition (35) and the first support sleeve (34). The middle part of the first pressurizing diaphragm (39) is pressed against the first partition (35) by a pressure block (14) in the middle of the first support sleeve (34). Above, a first high-pressure chamber (33) is formed between the first partition (35) and the support frame (22). The pump head body (30) is provided with a fourth water passage (02) that connects the first water outlet chamber (03) and the first high-pressure chamber (33). The first partition (35) is also provided with an inlet one-way valve (43). The inlet one-way valve (43) is provided with a first water inlet hole (44) located on the first partition (35). The outlet one-way valve (42) is provided with a first water outlet hole (41) located on the first partition (35).

5. A bidirectional diaphragm pump according to claim 4, characterized in that, A rotating magnetic assembly for transmitting power is provided between the first eccentric assembly (38) and the first motor (37). The rotating magnetic assembly includes a bracket (51), a driving magnetic ring (47), a driven magnetic ring (48), and a rotating shaft. The bracket (51) is circumferentially pressed between the first support sleeve (34) and the first motor (37). The middle part of the bracket (51) is concave downward to form a continuous primary cavity (52) and a secondary cavity (53). An eccentric seat (49) is provided in the primary cavity (52). The eccentric seat (49) is rotatably connected to the rotating shaft. The rotating shaft is connected to the first eccentric assembly (38). The driven magnetic ring (48) is sleeved on the eccentric seat (49). A rotating seat (46) connected to the output shaft of the first motor (37) is provided below the secondary cavity (53). The driving magnetic ring (47) is sleeved on the rotating seat (46). The driving magnetic ring (47) corresponds to the driven magnetic ring (48).

6. A bidirectional diaphragm pump according to claim 4, characterized in that, A first sealing ring (31) is pressed between the first partition (35) and the pump head body (30), and a second sealing ring (32) is pressed between the first partition (35) and the pump head body (30) in the circumferential direction.

7. A bidirectional diaphragm pump according to claim 1, characterized in that, The second pump includes a second partition (15), a second support sleeve (55), a second eccentric assembly (11), and a second pressurizing diaphragm (13) constituting the second pressurizing chamber (18). The upper end of the second eccentric assembly (11) is connected to a second motor (12). The second pressurizing diaphragm (13) is circumferentially pressed and sealed between the second partition (15) and the second support sleeve (55). The middle part of the second pressurizing diaphragm (13) is pressed onto the second partition (15) by a pressure block (14). The second partition (15) is provided with an inlet one-way diaphragm (20), and an outlet one-way diaphragm (17) is pressed between the second partition (15) and the support frame (22). The inlet one-way diaphragm (20) and the outlet one-way diaphragm (17) are respectively provided with a second inlet hole (19) and a second outlet hole (16).

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