Water pump protection waterway system

Abstract

The utility model discloses a water pump protection waterway system which comprises a water inlet end, a front filter element, a water pump, a reverse osmosis membrane filter element, a water outlet end and a wastewater collecting device which are communicated in sequence, wherein a first low-voltage switch is arranged on the water inlet side of the front filter element, and a second low-voltage switch is arranged on the water outlet side of the front filter element; a first high-pressure switch is arranged on the water inlet side of the reverse osmosis membrane filter element, a second high-pressure switch is arranged on the water outlet side of the reverse osmosis membrane filter element, and the disconnection pressure value of the first high-pressure switch is larger than that of the second high-pressure switch; the wastewater outlet end of the reverse osmosis membrane filter element is connected with the water inlet side of the wastewater collecting device. The water pump protection waterway system can ensure that the water pump operates in a normal working condition range, and the service life of the water pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a water pump protection water circuit system. Background Technique

[0002] In the application of water purifiers, the pump is one of the core components in the reverse osmosis system. How to ensure that the pump operates within the normal operating range is very crucial. Water interruption and blockage of the filter element after the pump can both make the water pump operate under non-rated conditions, and idling or overloading the pump will significantly reduce the pump life.

[0003] Water interruption can cause the water purifier to fail to produce water normally. Some of the reasons for water interruption may be blockage of the pre-filter in the system. During troubleshooting, it is often necessary to remove the pre-filter to make a judgment. In addition, the prior art is to install a low-pressure switch at the water inlet end of the water purifier. If water is interrupted, the low-pressure switch is triggered and the pump stops producing water. But in fact, blockage of the pre-filter in the system will also cause water interruption, and the water purifier has no water output or very little water output. This will lead to misjudgment. More seriously, the pump will idle for a long time, seriously affecting the pump life.

[0004] In addition, the design of a water purifier system needs to balance two important parameters: the pressure after the pump and the water flow rate of the system. When the pressure after the pump is high, the water production of the RO module is large, and the water flow rate of the system is large. However, a high pressure after the pump will bring a series of negative problems, ultimately posing challenges to the overall cost, the pressure resistance of pipe fittings, and the pump life, etc.

[0005] The disclosure of the above background technical content is only used to assist in understanding the concept and technical solution of the utility model, and it does not necessarily belong to the prior art of this application, nor will it necessarily give technical guidance; without clear evidence that the above content was publicly available before the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of this application. Content of the Utility Model

[0006] The purpose of the utility model is to provide a water pump protection water circuit system, which can ensure that the pump operates within the normal operating range and improve the service life of the pump.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A water pump protection water circuit system includes a water inlet end, a pre-filter, a water pump, a reverse osmosis membrane filter element, a water outlet end, and a waste water collection device that are connected in sequence; wherein, a first low-pressure switch is arranged on the water inlet side of the pre-filter, and a second low-pressure switch is arranged on the water outlet side of the pre-filter;

[0009] A first high-pressure switch is provided on the water inlet side of the reverse osmosis membrane filter element, and a second high-pressure switch is provided on the water outlet side of the reverse osmosis membrane filter element. The opening pressure value of the first high-pressure switch is greater than the opening pressure value of the second high-pressure switch;

[0010] The waste water outlet end of the reverse osmosis membrane filter element is connected to the water inlet side of the waste water collection device.

[0011] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the closing pressure value of the first low-pressure switch is not less than the opening pressure value of the second low-pressure switch.

[0012] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, a first one-way valve is further included. The water inlet side of the first one-way valve is connected to the water outlet side of the reverse osmosis membrane filter element, and the water outlet side of the first one-way valve is connected to the water outlet end;

[0013] The second high-pressure switch is arranged on the water path between the water outlet side of the first one-way valve and the water outlet end.

[0014] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, a relief valve is further included. The water inlet side of the relief valve is connected to the water outlet side of the water pump and the water inlet side of the reverse osmosis membrane filter element, and the water outlet side of the relief valve is connected to the water inlet side of the waste water collection device.

[0015] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the relief valve opens when the pressure value on the water outlet side of the water pump is not less than a first pressure value, and closes when the pressure value on the water outlet side of the water pump is less than the first pressure value;

[0016] The first pressure value is greater than the opening pressure value of the second low-pressure switch.

[0017] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, a solenoid valve and a pressure sensor are further included. The pressure sensor is configured to detect the water pressure of the water path connecting the water pump and the reverse osmosis membrane filter element;

[0018] The water inlet side of the solenoid valve is connected to the water outlet side of the water pump and the water inlet side of the reverse osmosis membrane filter element, and the water outlet side of the solenoid valve is connected to the water inlet side of the waste water collection device.

[0019] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, a flow meter is further included. The flow meter is arranged on the water path between the second high-pressure switch and the water outlet end.

[0020] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, it further includes a TDS sensor, and the TDS sensor is disposed between the first low-pressure switch and the pre-filter.

[0021] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, it further includes a mixing water circuit. The water outlet side of the pre-filter and the water outlet side of the reverse osmosis membrane filter are combined into the water inlet end of the mixing water circuit, and a second one-way valve is disposed between the water inlet end and the water outlet end of the mixing water circuit.

[0022] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the water inlet side of the pre-filter is connected to the water inlet end of the mixing water circuit.

[0023] The beneficial effects brought by the technical solutions provided by the present utility model are as follows:

[0024] a. By arranging low-pressure switches before and after the pre-filter in the system, whether the pre-filter is blocked before or after, the first low-pressure switch and the second low-pressure switch can be timely and correspondingly triggered to disconnect, avoiding the long-term idling of the water pump and improving the service life of the water pump.

[0025] b. By arranging high-pressure switches before and after the reverse osmosis membrane filter, replacing the existing technology that only makes a proper match between the water pump and the load after the pump according to the pressure after the reverse osmosis membrane filter, and there is no control over the pressure after the water pump, the safety hazard problem of no control over the pressure after the water pump can be solved.

[0026] c. By combining an overflow valve or a solenoid valve and a pressure sensor, the water circuit between the water outlet side of the water pump and the water inlet side of the reverse osmosis membrane filter is connected to the waste water collection device to form a bypass water circuit for further protecting the water pump, which can further protect the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 FIG. 27 is a schematic structural diagram of a first water pump protection water circuit system provided for an exemplary embodiment of the present utility model;

[0029] Figure 2 FIG. 31 is a schematic structural diagram of a second water pump protection water circuit system provided for an exemplary embodiment of the present utility model;

[0030] Figure 3 The structural schematic diagram of the third water pump protection water circuit system provided for an exemplary embodiment of the present utility model;

[0031] Figure 4 The structural schematic diagram of the fourth water pump protection water circuit system provided for an exemplary embodiment of the present utility model.

[0032] Wherein, the reference numerals include: 11 - water inlet end, 12 - water outlet end, 2 - pre-filter, 3 - water pump, 4 - reverse osmosis membrane filter element, 5 - waste water collection device, 61 - first low pressure switch, 62 - second low pressure switch, 71 - first high pressure switch, 72 - second high pressure switch, 81 - first one-way valve, 82 - second one-way valve, 91 - overflow valve, 92 - solenoid valve, 93 - pressure sensor, 94 - flowmeter. Detailed implementation manners

[0033] In order to enable those skilled in the art of the present technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0035] In an embodiment of the present utility model, a [specific content] is provided. Refer to Figure 1, including a water inlet end 11, a pre-filter 2, a water pump 3, a reverse osmosis membrane filter element 4, a water outlet end 12, and a waste water collection device 5 that are connected in sequence; wherein, a first low-pressure switch 61 is arranged on the water inlet side of the pre-filter 2, and a second low-pressure switch 62 is arranged on the water outlet side of the pre-filter 2. Preferably, the cut-off pressure value of the first low-pressure switch 61 is not less than the cut-off pressure value of the second low-pressure switch 62. All the pre-filters 2 and the reverse osmosis membrane filter elements 4 can be multiple filter elements connected in parallel.

[0036] A first high-pressure switch 71 is arranged on the water inlet side of the reverse osmosis membrane filter element 4, a second high-pressure switch 72 is arranged on the water outlet side of the reverse osmosis membrane filter element 4, and the cut-off pressure value of the first high-pressure switch 71 is greater than the cut-off pressure value of the second high-pressure switch 72. The waste water outlet end of the reverse osmosis membrane filter element 4 is connected to the water inlet side of the waste water collection device 5.

[0037] In the prior art, usually a low-pressure switch is installed at the water inlet end of a water circuit system such as a water purifier. If the water supply is cut off, the low-pressure switch is triggered and the water pump stops making water. But in fact, the blockage of the pre-filter in the system will also cause the water supply to be cut off, and the water purifier will have no water output or very little water output. This will lead to misjudgment. More seriously, the water pump will run idly for a long time, seriously affecting the life of the water pump.

[0038] In this application, by arranging low-pressure switches before and after the pre-filter 2 in the system, when the first low-pressure switch 61 is disconnected and triggered, at this time, regardless of whether the second low-pressure switch 62 is disconnected and triggered, the system determines that the disconnection of the first low-pressure switch 61 is effective, and the specific reason can be determined by checking for water cut-off or blockage of the pre-filter outside the system. When the first low-pressure switch 61 is not disconnected and triggered, and the second low-pressure switch 62 is disconnected and triggered, the system determines that the second low-pressure switch 62 is effective, and whether the pre-filter in the system is blocked can be checked. Avoiding the long-term idling of the water pump can improve the life of the water pump.

[0039] In addition, currently in the industry, it is generally to make a proper match between the water pump and the load after the pump according to the pressure after the reverse osmosis membrane filter element (RO membrane), control the pressure after the pump within a certain range, and then use a high-pressure switch or a pressure sensor to control the start and stop of the pump. When the high-pressure switch is disconnected and triggered or the pressure sensor is higher than a certain value, the water pump stops running. When the pressure value drops to the value at which the high-pressure switch is connected and triggered or the pressure sensor is lower than a certain value, the water pump starts running. However, in fact, using the pressure after the RO membrane to control the start and stop of the water pump has no control over the pressure after the water pump, and there are still potential safety hazards for the safe operation of the water pump.

[0040] In this embodiment, the start and stop of the pump are controlled by two high-voltage switches together. When the water outlet is opened, after the pressures at the first high-voltage switch 71 and the second high-voltage switch 72 are lower than their closing pressure values (for example, the water pressure is lower than 5 PSI), the two high-voltage switches are closed and the pump starts. Among them, the opening pressure value of the first high-voltage switch 71 is greater than the opening pressure value of the second high-voltage switch 72, and the opening pressure values of the first high-voltage switch 71 and the second high-voltage switch 72 are both greater than the closing pressure value. For example, the second high-voltage switch 72 is opened when the water pressure is 70 PSI, and the first high-voltage switch 71 is opened when the water pressure is 120 PSI. When any one of the two high-voltage switches is open, the water pump 3 stops working. Only when the two high-voltage switches are closed simultaneously can the water pump 3 work properly. The above two high-voltage switches can also be replaced by pressure sensors.

[0041] In one embodiment of the present utility model, referring to Figure 1 , the water circuit system further includes a first one-way valve 81. The water inlet side of the first one-way valve 81 is connected to the water outlet side of the reverse osmosis membrane filter element 4, and the water outlet side of the first one-way valve 81 is connected to the water outlet end 12; the second high-voltage switch 72 is arranged on the water path between the water outlet side of the first one-way valve 81 and the water outlet end 12.

[0042] In one embodiment of the present utility model, referring to Figure 2 , it further includes an overflow valve 91. The water inlet side of the overflow valve 91 is connected to the water outlet side of the water pump 3 and the water inlet side of the reverse osmosis membrane filter element 4, and the water outlet side of the overflow valve 91 is connected to the water inlet side of the waste water collection device 5.

[0043] The overflow valve 91 is opened when the pressure value on the water outlet side of the water pump 3 is not less than the first pressure value, and is closed when the pressure value on the water outlet side of the water pump 3 is less than the first pressure value; the first pressure value is greater than the opening pressure value of the second low-voltage switch 62.

[0044] Specifically, when the water outlet is opened, after the pressure at the second high-voltage switch 72 is lower than P1, the second high-voltage switch 72 is closed and the water pump 3 starts. When the water outlet is closed, after the pressure at the second high-voltage switch 72 is higher than P2, the second high-voltage switch 72 is opened and the water pump stops. When the pressure behind the water pump exceeds P3, the overflow valve is opened, and when the pressure behind the water pump is lower than P3, the overflow valve is closed. Wherein P1 < P2 < P3.

[0045] In another embodiment of the present utility model, referring to Figure 3 , an electromagnetic valve 92 and a pressure sensor 93 are used to replace the overflow valve 91 in the above embodiment. Referring to Figure 3, the pressure sensor 93 is configured to detect the water pressure in the waterway connecting the water pump 3 and the reverse osmosis membrane filter element 4; the water inlet side of the solenoid valve 92 is connected to the water outlet side of the water pump 3 and the water inlet side of the reverse osmosis membrane filter element 4, and the water outlet side of the solenoid valve 92 is connected to the water inlet side of the waste water collection device 5. In practical applications, when the pressure sensor 93 detects that the water pressure in its waterway is higher than a certain pressure value, the solenoid valve 92 is turned on, and this waterway is connected to the waste water collection device 5.

[0046] In the above embodiment, the combination of the overflow valve 91, the solenoid valve 92 and the pressure sensor 93 serves as a post-installation protection valve for the water pump. Its function is that after the water pressure in the waterway exceeds a certain value, the protection valve opens, and a part of the water flows into the waste water collection device 5 through the bypass branch, so that the pressure after the water pump can be ensured not to exceed a certain value, improving the protection performance of the water pump.

[0047] It should be noted that the water pump protection waterway system of any one of the above embodiments can also be a mixed water system, and branches can be respectively led out from before the pre-filter element, after the pre-filter element, and after the water pump, and merged with the water outlet side branch of the reverse osmosis water filter element into two-way mixed water.

[0048] In an embodiment of the present invention, see Figure 4 , it further includes a mixed water waterway. The water outlet side of the pre-filter element 2 and the water outlet side of the reverse osmosis membrane filter element 4 are combined into the water inlet end of the mixed water waterway, and a second one-way valve 82 is provided between the water inlet end and the water outlet end of the mixed water waterway. In this embodiment, the water inlet side of the pre-filter element can also be connected to the water inlet end of the mixed water waterway, that is, the three waterways before the pre-filter element, after the pre-filter element, and after the reverse osmosis membrane filter element are combined to form the mixed water waterway.

[0049] In addition, the water pump protection waterway system of any one of the above embodiments can also be increased with a pressure regulating unit, such as a pressure reducing valve, a needle valve, etc. A sensor unit can also be added, such as a flow meter, a TDS sensor, a pressure sensor, etc.

[0050] Such as Figure 3 As shown, the flow meter 94 is arranged on the waterway between the second high-pressure switch 72 and the water outlet end 12. The number of TDS sensors can be one or more. Specifically, the TDS sensor can be arranged between the first low-pressure switch 61 and the pre-filter element 2 to detect the water quality of the waterway after the pre-filter element 2; the TDS sensor can also be arranged on the water outlet side of the reverse osmosis membrane filter element 4 to detect the water quality of the waterway on the water outlet side of the reverse osmosis membrane filter element 4.

[0051] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0052] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A water pump protection waterway system, characterized in that: It comprises a water inlet (11), a pre-filter element (2), a water pump (3), a reverse osmosis membrane filter element (4), a water outlet (12) and a wastewater collection device (5) which are connected in sequence; wherein a first low-pressure switch (61) is provided on the water inlet side of the pre-filter element (2), and a second low-pressure switch (62) is provided on the water outlet side of the pre-filter element (2); A first high-pressure switch (71) is provided on the water inlet side of the reverse osmosis membrane filter element (4), and a second high-pressure switch (72) is provided on the water outlet side of the reverse osmosis membrane filter element (4), wherein the disconnection pressure value of the first high-pressure switch (71) is greater than the disconnection pressure value of the second high-pressure switch (72); The wastewater outlet end of the reverse osmosis membrane filter element (4) is connected to the water inlet side of the wastewater collection device (5).

2. The water pump protection waterway system according to claim 1, characterized in that: The cut-off pressure value of the first low-pressure switch (61) is not less than the disconnection pressure value of the second low-pressure switch (62).

3. The water pump protection waterway system according to claim 1, characterized in that: It also includes a first one-way valve (81), wherein the water inlet side of the first one-way valve (81) is connected to the water outlet side of the reverse osmosis membrane filter element (4), and the water outlet side of the first one-way valve (81) is connected to the water outlet end (12); The second high-pressure switch (72) is arranged on the water path between the water outlet side of the first one-way valve (81) and the water outlet end (12).

4. The water pump protection waterway system according to claim 1, characterized in that: It also includes an overflow valve (91), the water inlet side of the overflow valve (91) is connected to the water outlet side of the water pump (3) and the water inlet side of the reverse osmosis membrane filter element (4), and the water outlet side of the overflow valve (91) is connected to the water inlet side of the wastewater collection device (5).

5. The water pump protection waterway system according to claim 4, characterized in that: The overflow valve (91) opens when the pressure value on the water outlet side of the water pump (3) is not less than a first pressure value, and closes when the pressure value on the water outlet side of the water pump (3) is less than the first pressure value; The first pressure value is greater than a disconnection pressure value of the second low-pressure switch (62).

6. The water pump protection waterway system according to claim 1, characterized in that: It also includes a solenoid valve (92) and a pressure sensor (93), wherein the pressure sensor (93) is configured to detect the water pressure of the water path connecting the water pump (3) and the reverse osmosis membrane filter element (4); The water inlet side of the solenoid valve (92) is connected to the water outlet side of the water pump (3) and the water inlet side of the reverse osmosis membrane filter element (4), and the water outlet side of the solenoid valve (92) is connected to the water inlet side of the wastewater collection device (5).

7. The water pump protection waterway system according to claim 1, characterized in that: It also includes a flow meter (94), which is arranged on the water path between the second high-pressure switch (72) and the water outlet (12).

8. The water pump protection waterway system according to claim 1, characterized in that: It also includes a TDS sensor, which is arranged between the first low-pressure switch (61) and the pre-filter element (2).

9. The water pump protection waterway system according to claim 1, characterized in that: It also includes a mixed water circuit, wherein the water outlet side of the pre-filter element (2) and the water outlet side of the reverse osmosis membrane filter element (4) are combined to form the water inlet end of the mixed water circuit, and a second one-way valve (82) is provided between the water inlet end and the water outlet end of the mixed water circuit.

10. The water pump protection waterway system according to claim 9, characterized in that: The water inlet side of the pre-filter is connected to the water inlet end of the mixed water channel.

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