Double-head pump and table type water purifier

Abstract

The double-head pump has the advantages that an RO water inlet end is additionally arranged on a top cover of a water suction pump head, and the RO water inlet end is communicated with an RO membrane water outlet, so that purified water prepared by an RO membrane and purified water in a purified water container enter a water inlet cavity synchronously, and the water outlet flow of a water outlet terminal is increased; a pressure relief structure is additionally arranged on a fluid chamber of the water suction pump head, the water suction pump head works synchronously under the condition that a water outlet terminal closes the booster pump head and continues to work, and when purified water is pressurized by the booster structure of the water suction pump head to reach rated pressure, a pressure relief pipeline is communicated and returns to a water inlet cavity, and at the moment, the RO water inlet end has pressure output by the booster pump head; the water passing end of the container is free of pressure, purified water flows into the purified water container from the water passing end of the container, internal water circulation in the water suction pump head is avoided, the high-temperature condition is avoided, the use safety of the double-head pump and the table type water purifier is guaranteed, after the purified water container is full of the purified water, the pressure switch is switched off, and the double-head pump, the booster pump head and the water suction pump head stop working.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps for water purifiers, in particular to a double-head pump and a desktop water purifier. Background Art

[0002] With the increasing attention paid to health, water purifiers play an increasingly important role in users' daily lives. In the original water purification system, due to the different working conditions of filtering water and conveying water, two separate diaphragm pumps are generally used for work, one is a booster pump and the other is a water pump. The opening and closing of each pump is controlled by their respective motors to complete the water flow delivery. Among them, the booster pump for water production is the core power component of the water purifier. Its main function is to increase the water inlet pressure to the pressure required by the water purification filter element (RO membrane) and ensure a certain stable flow rate; the water pump for water supply is used to extract the pure water in the water purification bag and transport it to the water outlet terminal.

[0003] The defect of the above-mentioned water purification treatment system is that it is composed of two pumps and two sets of electronic control systems, which brings about a waste of system resources, and also makes the entire water purification treatment system huge and the system cost is high. If the existing double-head pump is used, due to the use of one motor, the two pump heads must work at the same time after the motor is started, and the two pump heads also stop conveying the medium at the same time after the motor is turned off. However, due to the different conveying times and flow rates of the two media, interference phenomena will occur in the pipeline, making it difficult to complete different functions, not only failing to meet the needs of the system, but also causing system disorder. Among them, the most pressing problem to be solved is that when the tap of the water outlet terminal is closed and the booster pump needs to work again, according to the structure of the existing double-head pump, the pump head will also work at the same time to extract pure water, causing the water circulation pressure inside the pump head fluid chamber to increase and form a continuous high temperature, and the high temperature state will cause the components to deform and seal failure and other undesirable conditions to occur, resulting in the pump head being unsafe, which needs to be improved. Utility Model Content

[0004] A technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide a fully usable double-head pump and a desktop water purifier.

[0005] The technical solution adopted by this dual-head pump to solve the technical problem is as follows: A dual-head pump includes a pump body, a water extraction pump head and a booster pump head respectively arranged at both ends of the pump body. On the top cover of the water extraction pump head, there is a container water passing end for communicating with a water purification container and a water outlet end for communicating with a water outlet terminal. A boosting structure is arranged between the container water passing end and the water outlet end. The container water passing end is communicated with the water inlet cavity of the boosting structure, and the water outlet end is communicated with the water outlet cavity of the boosting structure; on the top cover of the water extraction pump head, there is also an RO water inlet end for communicating with the RO membrane water outlet, and the RO water inlet end is communicated with the water inlet cavity of the boosting structure; a pressure relief structure is also arranged on the fluid chamber of the water extraction pump head. A pressure relief pipeline is formed between the pressure relief structure and the water outlet cavity and the water inlet cavity of the boosting structure, and when the pressure in the water outlet cavity reaches the rated pressure, the pressure relief pipeline is communicated.

[0006] Compared with the related technology, the dual-head pump of this application has the following advantages: An RO water inlet end is added to the top cover of the water extraction pump head. The RO water inlet end is communicated with the RO membrane water outlet, so that the purified water produced by the RO membrane and the purified water in the water purification container enter the water inlet cavity synchronously, increasing the water outlet flow of the water outlet terminal; at the same time, a pressure relief structure is also added to the fluid chamber of the water extraction pump head. When the water outlet terminal is closed and the booster pump head continues to work, the water extraction pump head also works synchronously. When the purified water passes through the boosting structure of the water extraction pump head and is boosted to the rated pressure, the pressure relief pipeline is communicated and returns to the water inlet cavity. At this time, the purified water at the RO water inlet end is pushed by the pressure of the booster pump head, while the purified water conveyed by the container water passing end has no pressure support. The purified water at the RO water inlet end and the purified water in the boosting structure flow into the water purification container from the container water passing end, avoiding the internal water circulation in the water extraction pump head, so that the high-temperature situation will not occur, ensuring the use safety of the dual-head pump and the tabletop water purifier. After the water purification container is filled with purified water, the pressure switch turns off the power supply of the dual-head pump, and the booster pump head and the water extraction pump head stop working.

[0007] Preferably, the pressure relief structure includes a nested hole and a pressure relief valve; the outer hole of the nested hole is communicated with the water outlet cavity, and the inner hole of the nested hole is communicated with the water inlet cavity; the elastic valve core of the pressure relief valve covers the port of the nested hole to block the communication between the outer hole and the inner hole, and when the pressure in the water outlet cavity reaches the rated pressure, the elastic valve core is disengaged from the port of the nested hole to communicate the outer hole and the inner hole.

[0008] Preferably, the pressure relief valve further includes a small top cover, an upper spring seat, a pressure relief spring and a lower spring seat; the small top cover is fixed to the valve seat on the top cover of the water extraction pump head and presses the elastic valve core. The upper spring seat is plugged at the top of the spring groove in the small top cover. The lower spring seat is plugged at the bottom of the spring groove in the small top cover and is slidably matched with the spring groove. The lower spring seat abuts against the elastic valve core, and the pressure relief spring abuts between the upper spring seat and the lower spring seat.

[0009] As an improvement, a threaded hole is provided at the top of the small top cover, and a pressure regulating screw is screwed into the threaded hole. The bottom end of the pressure regulating screw abuts against the upper spring seat. By adjusting the position of the upper spring seat in the spring groove of the small top cover, the axial compression distance of the pressure relief spring is adjusted, that is, the rated pressure of the pressure relief structure is adjusted, and the water output flow of the water outlet terminal can be adjusted.

[0010] As an improvement, a groove is provided at the bottom of the lower spring seat, and a convex block is provided at the upper end of the elastic valve core. The convex block is inserted into the groove. It is used to facilitate the assembly of the lower spring seat and the elastic valve core, so as to calibrate the installation position of the elastic valve core in the valve cavity and ensure the sealing effect.

[0011] The technical solution adopted by this tabletop water purifier to solve the technical problem is: a tabletop water purifier adopts the double-head pump as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a perspective view of the double-head pump of the present utility model.

[0013] Figure 2 is a top perspective view of the top cover of the present utility model.

[0014] Figure 3 is a bottom perspective view of the top cover of the present utility model.

[0015] Figure 4 is a schematic cross-sectional view of the present utility model.

[0016] Figure 5 is Figure 4 an enlarged schematic view of part A of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust it according to needs to adapt to specific application scenarios.

[0018] This embodiment is a double-head pump for a tabletop water purifier, as Figures 1 to 5As shown in the figure, it includes a pump body 1, a motor 2, a booster pump head 3 and a water extraction pump head 4 respectively arranged at both ends of the pump body 1. On the top cover 40 of the water extraction pump head 4, there are a container water inlet end 41 for communicating with a water purification container and a water outlet end 42 for communicating with a water outlet terminal. A pressurizing structure is arranged between the container water inlet end 41 and the water outlet end 42. The container water inlet end 41 is communicated with the water inlet cavity 431 of the pressurizing structure, and the water outlet end 42 is communicated with the water outlet cavity 432 of the pressurizing structure. On the top cover of the water extraction pump head 4, there is also an RO water inlet end 44 for communicating with the RO membrane water outlet, and the RO water inlet end 44 is communicated with the water inlet cavity 431 of the pressurizing structure. A pressure relief structure is also arranged on the fluid chamber 43 of the water extraction pump head 4. The pressure relief structure forms a pressure relief pipeline between the water outlet cavity 432 and the water inlet cavity 431 of the pressurizing structure, and the pressure relief pipeline is communicated when the pressure in the water outlet cavity 432 reaches a certain pressure.

[0019] Specifically, the pressure relief structure includes a nested hole 46 and a pressure relief valve. The outer hole 461 of the nested hole 46 can be called a pressure relief cavity, and the outer hole 461 is communicated with the water outlet cavity 432. The inner hole 462 of the nested hole 46 can be called a pressure relief hole, and the inner hole 462 is communicated with the water inlet cavity 431. The body of the elastic valve core 455 of the pressure relief valve is in a circular plate shape. The elastic valve core 455 covers the upper end port of the nested hole 46 to block the communication between the outer hole 461 and the inner hole 462, and when the pressure in the water outlet cavity 432 reaches the rated pressure, the elastic valve core 455 is disengaged from the port of the nested hole 46 so that the outer hole 461 is communicated with the inner hole 462. At this time, the elastic valve core 455 and the nested hole 46 still maintain a sealed connection.

[0020] In this embodiment, the pressure relief valve further includes a small top cover 451, an upper spring seat 452, a pressure relief spring 453 and a lower spring seat 454. The small top cover 451 is fixed to the valve seat on the top cover 40 of the water extraction pump head 4 and presses the elastic valve core 455. The upper spring seat 452 is plugged into the top of the spring groove in the small top cover 451. The lower spring seat 454 is plugged into the bottom of the spring groove in the small top cover 451 and is in sliding fit with the spring groove. The lower spring seat 454 abuts against the elastic valve core 455, and the pressure relief spring 453 abuts between the upper spring seat 452 and the lower spring seat 454.

[0021] As an improvement, a threaded hole is provided at the top of the small top cover 451, and an adjusting rod (not shown in the figure) is screwed into the threaded hole. The bottom end of the adjusting rod abuts against the upper spring seat 452.

[0022] As an improvement, a groove (not marked in the figure) is provided at the bottom of the lower spring seat 454, and a convex block (not marked in the figure) is provided at the upper end of the elastic valve core 455. The convex block is inserted into the groove.

[0023] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A double-headed pump, comprising a pump body and a water extraction pump head and a booster pump head respectively arranged at both ends of the pump body. A container water passing end for communicating with a water purification container and a water outlet end for communicating with a water outlet terminal are provided on the top cover of the water extraction pump head. A boosting structure is arranged between the container water passing end and the water outlet end. The container water passing end is communicated with the water inlet cavity of the boosting structure, and the water outlet end is communicated with the water outlet cavity of the boosting structure; it is characterized in that, The top cover of the water pump head is also provided with an RO water inlet end for communicating with the water outlet of the RO membrane, and the RO water inlet end is communicated with the water inlet cavity of the pressurizing structure; a pressure relief structure is also provided on the fluid chamber of the water pump head, and a pressure relief pipeline is formed between the pressure relief structure and the water outlet cavity and the water inlet cavity of the pressurizing structure, and the pressure relief pipeline is communicated when the pressure in the water outlet cavity reaches the rated pressure.

2. The double-headed pump according to claim 1, characterized in that, The pressure relief structure includes a nested hole and a pressure relief valve; the outer hole of the nested hole is communicated with the water outlet cavity, and the inner hole of the nested hole is communicated with the water inlet cavity; the elastic valve core of the pressure relief valve covers the port of the nested hole to block the communication between the outer hole and the inner hole, and the elastic valve core is disengaged from the port of the nested hole to communicate the outer hole and the inner hole when the pressure in the water outlet cavity reaches the rated pressure.

3. The double-headed pump according to claim 2, wherein The pressure relief valve further includes a small top cover, an upper spring seat, a pressure relief spring and a lower spring seat; the small top cover is fixed to the valve seat on the top cover of the water pump head and presses the elastic valve core, the upper spring seat is plugged at the top of the spring groove in the small top cover, the lower spring seat is plugged at the bottom of the spring groove in the small top cover and is slidably matched with the spring groove, the lower spring seat abuts against the elastic valve core, and the pressure relief spring abuts between the upper spring seat and the lower spring seat.

4. The double-headed pump according to claim 3, characterized in that, The top of the small top cover is provided with a threaded hole, and an adjusting rod is screwed in the threaded hole, and the bottom end of the adjusting rod abuts against the upper spring seat.

5. The double-headed pump according to claim 3, characterized in that, The bottom of the lower spring seat is provided with a groove, and the upper end of the elastic valve core is provided with a convex block, and the convex block is inserted into the groove.

6. A desktop water purifier, characterized in that, It includes a double-headed pump according to any one of claims 1 to 5.

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