A new diaphragm pump

Abstract

This invention discloses a novel diaphragm pump, comprising: a booster pump head, a pump head, and a motor. The motor is a dual-output shaft motor, wherein one output shaft is drivenly connected to the booster pump head, and the other output shaft is drivenly connected to the pump head. The pump head includes a pump body, a diaphragm boosting mechanism, and an overflow device. The pump body has an inlet chamber and an outlet chamber. The pump body also has a first outlet communicating with the outlet chamber and an inlet communicating with the inlet chamber. The first outlet is connected to a first one-way valve, and the inlet is connected to a filter element. The diaphragm boosting mechanism is located between the inlet chamber and the outlet chamber. This invention maintains the fluidity of the water inside the pump, effectively disperses and reduces the temperature of the diaphragm during operation, thereby ensuring that the diaphragm inside the pump remains stable and reliable under high-temperature environments, extending the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the technical field of water purifiers, and more particularly to a novel diaphragm pump. Background Technology

[0002] With the improvement of living standards, water safety has become an increasingly important concern for people, and the use of water purifiers has become more and more common. In some small-flow water purification systems, municipal water is typically pressurized by a booster pump, filtered through a filtration system, and then stored in a water storage device. When water is needed, a pump quickly draws water from the storage device and dispenses it from the tap to avoid waiting for users due to excessive filtration time. The above system requires one booster pump to pressurize the filtration system and another pump to draw water from the storage device. These two pumps have different technical requirements due to different application scenarios. At the same time, the use of two pumps makes the water system more complex and increases costs.

[0003] A dual-head pump assembly is also used in water purification systems. Its booster pump head and water pump head share a set of drive motors. When the system outlet is closed, the outlet of the water pump head is blocked in this scenario. The high temperature caused by the continuous circulation of water inside the pump damages the pump seal and leads to water leakage. Summary of the Invention

[0004] In view of the aforementioned problems with existing pump assemblies, the aim is to provide a novel diaphragm pump.

[0005] The specific technical solution is as follows:

[0006] A novel diaphragm pump includes: a booster pump head, a water pump head, and a motor, wherein the motor is a dual-output shaft motor, wherein one output shaft is drivenly connected to the booster pump head, and the other output shaft is drivenly connected to the water pump head;

[0007] The water pump head includes:

[0008] The pump body has an inlet chamber and an outlet chamber. The pump body also has a first outlet that communicates with the outlet chamber and an inlet that communicates with the inlet chamber. The first outlet is connected to the first check valve, and the inlet is connected to the filter element.

[0009] A diaphragm pressurization mechanism is provided between the water inlet chamber and the water outlet chamber, and is used to pressurize the purified water in the water inlet chamber and then input it into the water outlet chamber.

[0010] The pump body also has a second outlet that communicates with the water inlet chamber, and the second outlet is connected to the water storage device.

[0011] The pump body is provided with an overflow device, which includes an overflow chamber disposed within the pump body. The bottom of the overflow chamber has a first through hole communicating with the inlet chamber and a second through hole communicating with the outlet chamber. A sealing plate is slidably disposed within the overflow chamber. An elastic element is disposed between the sealing plate and the top of the overflow chamber, so that the sealing plate seals the first through hole and the second through hole. When the hydraulic pressure in the outlet chamber is greater than the elastic force of the elastic element, the sealing plate slides upward and releases the seal on the first through hole and the second through hole, so that the clean water in the outlet chamber flows sequentially through the second through hole, the overflow chamber, and the first through hole into the inlet chamber.

[0012] As a further improvement and optimization of this solution, the elastic element is a spring, with one end of the spring abutting against the sealing plate and the other end abutting against the top of the overflow cavity.

[0013] As a further improvement and optimization of this solution, the sealing plate and the overflow cavity form a sealed sliding fit.

[0014] As a further improvement and optimization of this solution, the diaphragm pressurization mechanism includes at least one diaphragm groove disposed at the bottom of the pump body;

[0015] Also includes:

[0016] A diaphragm sheet is provided, which seals and covers the opening of the diaphragm groove and forms a diaphragm cavity with the diaphragm groove. A second one-way valve is provided between the water inlet cavity and the diaphragm cavity, and a third one-way valve is provided between the diaphragm cavity and the water outlet cavity.

[0017] A plunger is connected to the diaphragm and is operably reciprocating longitudinally. When the plunger moves downward, a negative pressure is formed in the diaphragm cavity, and the second one-way valve opens to allow water in the inlet cavity to flow unidirectionally into the diaphragm cavity. When the plunger moves upward, a positive pressure is formed in the diaphragm cavity, and the third one-way valve opens to allow water in the diaphragm cavity to flow unidirectionally into the outlet cavity.

[0018] As a further improvement and optimization of this solution, the water inlet chamber is arranged around the periphery of the water outlet chamber, and multiple diaphragm grooves are provided and are equally spaced along the circumference; wherein, the diaphragm sheet is provided at the opening of multiple diaphragm grooves and respectively seals and cooperates with the opening of several diaphragm grooves.

[0019] The diaphragm pressurization mechanism further includes:

[0020] A support plate is mounted on the pump body and located at the bottom of the diaphragm to support the diaphragm. The support plate has a plurality of openings that match the diaphragm grooves. The plunger is connected to the diaphragm at the plurality of openings by a plurality of connectors.

[0021] As a further improvement and optimization of this solution, the plunger is connected to one of the output shafts of the motor via a cam structure, and the motor drives the plunger to reciprocate longitudinally via the cam structure.

[0022] The positive effects of the above technical solution compared with the existing technology are:

[0023] (1) In the present invention, the first outlet of the pump head is blocked. In this mode, although the diaphragm continues to reciprocate, if the external water source does not enter the pump body to participate in the circulation, the internal water will only circulate on its own, which will cause the water temperature to rise sharply due to the repeated compression of the diaphragm, which will lead to high temperature deformation, damage or even leakage of the diaphragm. To solve this problem, a second outlet is added. This design allows some of the water in the pump to be discharged through the second outlet, while introducing new water to mix, maintain the fluidity of the water in the pump, effectively disperse and reduce the temperature of the diaphragm when it is working, thereby ensuring that the diaphragm in the pump remains stable and reliable in a high temperature environment and extending the service life of the equipment.

[0024] (2) In this invention, when the first outlet of the pump head is blocked, the water in the outlet chamber cannot be discharged from the first outlet. The pressure in the outlet chamber continues to increase. When the pressure reaches the preset pressure of the elastic element, the blocking plate is pushed open. The water flows into the water chamber through the second through hole, the overflow chamber, and the first through hole in sequence, and is discharged from the second outlet along with another part of the water. This allows some of the clean water to be discharged through the outlet chamber, effectively avoiding the sealing failure and leakage caused by the internal circulation of water in the chamber, which causes the diaphragm 566 to become too hot due to continuous reciprocating motion. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a water purifier system using a novel diaphragm pump according to the present invention;

[0026] Figure 2 This is a cross-sectional view of the pump head of a water purifier system using a novel diaphragm pump according to the present invention.

[0027] Figure 3 This is a schematic diagram of the overflow device of the pump head of a water purifier system using a novel diaphragm pump according to the present invention.

[0028] Figure 4 This is a schematic diagram of the pump head of a water purifier system using a novel diaphragm pump according to the present invention.

[0029] In the attached diagram: 1. Inlet solenoid valve; 2. Pre-filter; 3. Booster pump head; 4. Filter cartridge; 5. Pump head; 6. First check valve; 7. Post-filter; 8. High-pressure switch; 9. Outlet valve; 10. Water storage device; 20. Water level controller; 30. Motor; 41. Concentrate solenoid valve; 51. Inlet chamber; 52. Outlet chamber; 53. First outlet; 54. Inlet; 55. Overflow device; 56. Isolation 57. Membrane pressurization mechanism; 58. Second outlet; 59. Pump body; 50. Overflow chamber; 51. Sealing plate; 52. Elastic element; 53. Second through hole; 54. First through hole; 555. Second check valve; 566. Diaphragm chamber; 57. Third check valve; 58. Support plate; 59. Cam structure; 50. Diaphragm sheet; 51. Plunger; 52. Opening; 53. Connector. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0031] Figure 1 This is a schematic diagram of a water purifier system using a novel diaphragm pump according to the present invention. Figure 2 This is a cross-sectional view of the pump head of a water purifier system using a novel diaphragm pump according to the present invention. Figure 3 This is a schematic diagram of the overflow device of the pump head of a water purifier system using a novel diaphragm pump according to the present invention. Figure 4 This is a schematic diagram of the pump head of a water purifier system using a novel diaphragm pump according to the present invention. Figures 1 to 4 The diagram illustrates a preferred embodiment of a water purifier system using a novel diaphragm pump, comprising: an inlet solenoid valve 1, a pre-filter 2, a booster pump head 3, a filter element 4, a pump head 5, a first check valve 6, a post-filter 7, a high-pressure switch 8, and an outlet valve 9, connected in sequence; it also includes: a motor 30 and a water storage device 10. The motor 30 is a dual-output shaft motor 30, wherein one output shaft is drivenly connected to the booster pump head 3 and the other output shaft is drivenly connected to the pump head 5. The pump head 5 is connected to the water storage device 10. When the outlet valve 9 is closed, the pump head 5 is used to transport the purified water filtered by the filter element 4 to the water storage device 10 for storage. When the outlet valve 9 is open, the pump head 5 is used to transport the purified water stored in the water storage device 10 and / or the purified water filtered by the filter element 4 to the post-filter 7.

[0032] In this embodiment, the water inlet system uses a dual-output shaft motor 30 to simultaneously drive a booster pump head 3 and a water pump head 5. The two pump heads have different technical parameters and functions, which can achieve the dual function of pressurizing the filter element assembly and quickly pumping water from the water storage device 10. At the same time, it has great advantages in terms of cost, water circuit complexity, and volume.

[0033] In this embodiment, when the outlet valve 9 is closed, the pump head 5 can deliver the purified water filtered by the filter element 4 into the water storage device 10 for storage, thus avoiding the high temperature caused by the continuous circulation of water inside the pump head 5, which could damage the seal of the pump head 5 and lead to leakage.

[0034] Furthermore, in a preferred embodiment, the pump head 5 includes a pump body 58 and a diaphragm pressurization mechanism 56. The pump body 58 has an inlet chamber 51 and an outlet chamber 52. The pump body 58 also has a first outlet 53 communicating with the outlet chamber 52 and an inlet 54 communicating with the inlet chamber 51. The first outlet 53 is connected to a first one-way valve 6, and the inlet 54 is connected to a filter element 4. The diaphragm pressurization mechanism 56 is located between the inlet chamber 51 and the outlet chamber 52, and is used to pressurize the purified water in the inlet chamber 51 and input it into the outlet chamber 52. The pump body 58 also has a second outlet 57 communicating with the inlet chamber 51, and the second outlet 57 is connected to the water storage device 10. The pump body 58 is provided with an overflow device 55, which includes... The overflow chamber 551 inside the pump body 58 has a first through hole 555 communicating with the inlet chamber 51 and a second through hole 554 communicating with the outlet chamber 52 at its bottom. A sealing plate 552 is slidably provided inside the overflow chamber 551. An elastic element 553 is provided between the sealing plate 552 and the top of the overflow chamber 551 so that the sealing plate 552 can block the first through hole 555 and the second through hole 554. When the hydraulic pressure in the outlet chamber 52 is greater than the elastic force of the elastic element 553, the sealing plate 552 slides upward and releases the blockage of the first through hole 555 and the second through hole 554, so that the clean water in the outlet chamber 52 flows into the inlet chamber 51 in sequence through the second through hole 554, the overflow chamber 551, and the first through hole 555.

[0035] In this embodiment, when the outlet valve 9 is closed, there is no need for pressurization and synchronous operation with the pump head 5. The first outlet 53 of the pump head 5 is blocked. In this mode, although the diaphragm 566 continues to reciprocate, if the external water source does not enter the pump body 58 to participate in the circulation, the internal water will only circulate on its own, causing the water temperature to rise sharply due to the repeated compression of the diaphragm 566. This can lead to high-temperature deformation, damage, or even leakage of the diaphragm 566. To solve this problem, a second outlet 57 is added. This design allows some of the water in the pump to be discharged through the second outlet 57, while introducing new water to mix with it, maintaining the fluidity of the water in the pump, effectively dispersing and reducing the temperature of the diaphragm 566 during operation, thereby ensuring that the diaphragm 566 in the pump remains stable and reliable in high-temperature environments and extending the service life of the equipment.

[0036] Specifically, when the first outlet 53 of the pump head 5 is blocked, the water in the outlet chamber 52 cannot be discharged from the first outlet 53, and the pressure in the outlet chamber 52 continues to increase. When the pressure reaches the preset pressure of the elastic element 553, the sealing plate 552 is pushed open, and the water flows into the water chamber 51 through the second through hole 554, the overflow chamber 551, and the first through hole 555 in sequence. Together with another part of the water, it is discharged from the second outlet 57, allowing some of the clean water to be discharged through the outlet chamber 52. This effectively avoids the diaphragm 566 from overheating due to continuous reciprocating motion caused by the internal circulation of water in the chamber, which could lead to sealing failure and leakage.

[0037] Furthermore, as a preferred embodiment, the elastic element 553 is a spring, with one end of the spring abutting against the sealing plate 552 and the other end abutting against the top of the overflow cavity 551.

[0038] Furthermore, as a preferred embodiment, the sealing plate 552 and the overflow cavity 551 form a sealed sliding fit.

[0039] Furthermore, in a preferred embodiment, the diaphragm pressurization mechanism 56 includes at least one diaphragm groove disposed at the bottom of the pump body 58; it also includes: a diaphragm sheet 566 and a plunger 567. The diaphragm sheet 566 seals and covers the opening of the diaphragm groove, forming a diaphragm cavity 562 between the diaphragm groove and the diaphragm cavity. A second one-way valve 561 is provided between the inlet chamber 51 and the diaphragm cavity 562, and a third one-way valve 563 is provided between the diaphragm cavity 562 and the outlet chamber 52. The plunger 567 is connected to the diaphragm sheet 566 and can be operably reciprocated longitudinally. When the plunger 567 moves downward, a negative pressure is formed in the diaphragm cavity 562, and the second one-way valve 561 opens to allow water in the inlet chamber 51 to flow unidirectionally into the diaphragm cavity 562. When the plunger 567 moves upward, a positive pressure is formed in the diaphragm cavity 562, and the third one-way valve 563 opens to allow water in the diaphragm cavity 562 to flow unidirectionally into the outlet chamber 52.

[0040] In this embodiment, when the plunger 567 retracts backward, the diaphragm 566 moves backward synchronously, causing the volume of the diaphragm cavity 562 to increase and form a negative pressure. At this time, under the action of external water pressure, the second one-way valve 561 automatically opens, allowing water to flow from the inlet cavity 51 into the diaphragm cavity 562. Conversely, when the plunger 567 expands forward, it pushes the diaphragm 566 forward, compressing the space of the diaphragm cavity 562 and generating a positive pressure, causing the second one-way valve 561 to close and the third one-way valve 563 to open, so that water with a certain pressure is pushed to the outlet cavity 52 and finally discharged from the first outlet 53, realizing the pressurization function. In particular, since the second outlet 57 is connected to the inlet cavity 51, water can be drawn from the second outlet 57 synchronously during operation, forming a cyclic operation mode, effectively completing the continuous process of pumping and pressurizing.

[0041] Furthermore, in a preferred embodiment, the inlet chamber 51 is arranged around the periphery of the outlet chamber 52, and multiple diaphragm grooves are provided and are equally spaced along the circumference; wherein, the diaphragm sheet 566 is provided at the opening of the multiple diaphragm grooves and respectively seals and cooperates with the opening of the multiple diaphragm grooves.

[0042] The diaphragm pressurization mechanism 56 also includes a support plate 564, which is mounted on the pump body 58 and located at the bottom of the diaphragm 566 for supporting the diaphragm 566. The support plate 564 has multiple openings 5641 that match the diaphragm grooves. The plunger 567 is connected to the diaphragm 566 at the multiple openings 5641 through multiple connectors 5671.

[0043] Furthermore, in a preferred embodiment, the plunger 567 is connected to the output shaft of the motor 30 via a cam structure 565, and the motor 30 drives the plunger 567 to reciprocate longitudinally via the cam structure 565.

[0044] Even better, the structure of the booster pump head 3 is roughly the same as that of the water pump head 5, except that the booster pump head 3 does not have an overflow device 55 and a second outlet 57.

[0045] Furthermore, as a preferred embodiment, the water storage device 10 is also provided with a water level controller 20, which is connected to the water inlet solenoid valve 1 and the motor 30 for detecting the water level in the water storage device 10 so as to open or close the water inlet solenoid valve 1 and start or stop the motor 30.

[0046] Furthermore, as a preferred embodiment, a concentrated water solenoid valve 41 is also connected to the filter element 4.

[0047] Water storage procedure:

[0048] During the water storage stage, municipal tap water first enters the system through the inlet solenoid valve 1, then flows through the pre-filter 2 for preliminary filtration. The purified water enters the booster pump head 3, and after being pressurized in the pump head, it enters the filter element 4 for further purification. During this process, concentrated water (i.e. wastewater containing more impurities) is discharged from the system through the concentrated water solenoid valve 41.

[0049] The purified water then enters the pump head 5. Since the outlet valve 9 is closed, the purified water cannot be directly discharged through the first outlet 53. At this time, the purified water is divided: part of it passes directly through the inlet chamber 51 of the pump head 5 and enters the water storage device 10 through the second outlet 57 for storage; the other part enters the outlet chamber 52 through the diaphragm pressurization. As the pressure in the outlet chamber 52 gradually increases, when it reaches the preset pressure value of the elastic element 553, the sealing plate 552 is pushed open, allowing water to flow into the inlet chamber 51 through the second through hole 554, the overflow chamber 551, and the first through hole 555 in sequence, and finally enters the water storage device 10 through the second outlet 57. This design effectively avoids the problem of the diaphragm 566 overheating due to water circulation in the pump, protecting the sealing performance of the diaphragm 566 and preventing leakage.

[0050] The water storage device 10 is equipped with a water level controller 20. Once the water level reaches the high level, the controller sends a full water signal and then closes the water inlet solenoid valve 1 and the motor 30, so that the system enters the standby state.

[0051] Water dispensing procedure:

[0052] When water is needed, the outlet valve 9 is opened, causing the high-pressure switch 8 to conduct due to pressure loss, which in turn triggers the inlet solenoid valve 1 to open and the motor 30 to work. Similar to the water storage procedure, after the tap water is filtered and pressurized, it enters the pump head 5. Since the second outlet 57 is connected to the inlet chamber 51, under the pressure of the diaphragm, the pump head can simultaneously draw fresh purified water from the filter element 4 and the stored purified water in the water storage device 10. This purified water then passes through the first one-way valve 6, the post-filter element 7, the high-pressure switch 8 and the outlet valve 9, and is finally discharged from the purified water outlet, realizing a large flow of purified water supply.

[0053] If the outlet valve 9 is closed during use, the high-pressure switch 8 will disconnect due to increased pressure. At this time, if the water level in the water storage device 10 is not high, the water level controller 20 will send a water shortage signal, and the water purifier will automatically restart the water storage program to replenish the water. Conversely, if the water storage device 10 is full, the system will continue to remain in standby mode, waiting for the next water dispensing command.

[0054] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel diaphragm pump, characterized in that, include: The system includes a booster pump head, a filter element, a water pump head, a first check valve, a motor, and a water storage device. The motor is a dual-output shaft motor, wherein one output shaft is drivenly connected to the booster pump head, and the other output shaft is drivenly connected to the water pump head. The water pump head includes: The pump body has an inlet chamber and an outlet chamber. The pump body also has a first outlet that communicates with the outlet chamber and an inlet that communicates with the inlet chamber. The first outlet is connected to the first check valve, and the inlet is connected to the filter element. A diaphragm pressurization mechanism is provided between the water inlet chamber and the water outlet chamber, and is used to pressurize the purified water in the water inlet chamber and then input it into the water outlet chamber. The pump body also has a second outlet that communicates with the water inlet chamber, and the second outlet is connected to the water storage device. The pump body is provided with an overflow device, which includes an overflow chamber disposed within the pump body. The bottom of the overflow chamber has a first through hole communicating with the inlet chamber and a second through hole communicating with the outlet chamber. A sealing plate is slidably disposed within the overflow chamber. An elastic element is disposed between the sealing plate and the top of the overflow chamber, so that the sealing plate seals the first through hole and the second through hole. When the hydraulic pressure in the outlet chamber is greater than the elastic force of the elastic element, the sealing plate slides upward and releases the seal on the first through hole and the second through hole, so that the clean water in the outlet chamber flows sequentially through the second through hole, the overflow chamber, and the first through hole to the inlet chamber, and enters the water storage device through the second outlet.

2. The novel diaphragm pump according to claim 1, characterized in that, The elastic element is a spring, with one end of the spring abutting against the sealing plate and the other end abutting against the top of the overflow cavity.

3. The novel diaphragm pump according to claim 1, characterized in that, The sealing plate and the overflow cavity form a sealed sliding fit.

4. The novel diaphragm pump according to claim 1, characterized in that, The diaphragm pressurization mechanism includes at least one diaphragm groove disposed at the bottom of the pump body; Also includes: A diaphragm sheet is provided, which seals and covers the opening of the diaphragm groove and forms a diaphragm cavity with the diaphragm groove. A second one-way valve is provided between the water inlet cavity and the diaphragm cavity, and a third one-way valve is provided between the diaphragm cavity and the water outlet cavity. A plunger is connected to the diaphragm and is operably reciprocating longitudinally. When the plunger moves downward, a negative pressure is formed in the diaphragm cavity, and the second one-way valve opens to allow water in the inlet cavity to flow unidirectionally into the diaphragm cavity. When the plunger moves upward, a positive pressure is formed in the diaphragm cavity, and the third one-way valve opens to allow water in the diaphragm cavity to flow unidirectionally into the outlet cavity.

5. The novel diaphragm pump according to claim 4, characterized in that, The inlet chamber is arranged around the periphery of the outlet chamber, and multiple diaphragm grooves are provided and are equally spaced along the circumference; wherein, the diaphragm sheet is provided at the opening of multiple diaphragm grooves and respectively seals and cooperates with the opening of several diaphragm grooves. The diaphragm pressurization mechanism further includes: A support plate is mounted on the pump body and located at the bottom of the diaphragm to support the diaphragm. The support plate has a plurality of openings that match the diaphragm grooves. The plunger is connected to the diaphragm at the plurality of openings by a plurality of connectors.

6. The novel diaphragm pump according to claim 5, characterized in that, The plunger is connected to one of the output shafts of the motor via a cam structure, and the motor drives the plunger to reciprocate longitudinally via the cam structure.

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