A multi-purpose pump and a hot water purification system composed thereof

Abstract

The present invention discloses a multi-purpose pump and a hot water purification system composed of the same, including a pump head body, wherein the pump head body is provided with a first water inlet channel and a second water inlet channel, a pressure chamber, and a water outlet channel which are mutually conductive, wherein the first water inlet channel and the water outlet channel are connected to the water inlet and the water outlet, respectively, and further comprising a negative pressure valve seat, wherein a vacuum chamber is provided in the negative pressure valve seat, and the pump head body is further provided with a water inlet chamber, wherein the vacuum chamber is connected to the water inlet chamber via a fourth water inlet channel, wherein the water inlet chamber is connected to the pressure chamber via a one-way water flow control structure, and wherein a reflux chamber and a reflux outlet which is conductive to the reflux chamber are further provided in the pump head body, wherein the water channel connecting the second water inlet channel, the vacuum chamber, and the reflux chamber is provided with a first water sealing convex ring and a second water sealing convex ring, and a water cut-off assembly which controls the sealing or conductiveness of the water channel at the two water sealing convex rings. This solution is used to simplify the water channel structure of a pure water machine and reduce costs while ensuring the control of the purified water flow rate, and at the same time, excess water can be refluxed for secondary filtration to ensure the normal operation of the entire system.

Description

Technical Field

[0001] The present invention relates to the field of fluid technology, in particular to a multi-purpose pump and a clean hot water system composed thereof. Background Art

[0002] With economic development, water resources are deteriorating in many areas, with increasing shortages and pollution, raising the question of drinking water safety for urban residents. To address the secondary contamination of urban tap water and the presence of harmful substances in tap water due to source water contamination, more and more household water purifiers using reverse osmosis membranes as their core filtration units are entering the market. Existing household water purifiers utilize reverse osmosis membranes as their core filtration units. After multi-stage pretreatment and pressurization of tap water before entering the reverse osmosis membrane unit, the resulting purified water fully meets the drinking water standards of developed countries.

[0003] At present, in general pure water machine systems, the general configuration is to directly connect the pipeline to the heating unit, and the purified water enters the heating unit directly through the pump for heating. However, the water flow entering the heating unit is uncontrolled, resulting in poor heating effect. It is often necessary to add some flow control valves to adjust the water intake. However, this increases the complexity of the water channel structure and its cost. In addition, the excess water in the pump cannot flow back, and the system cannot operate normally. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-purpose pump and a pure hot water system composed of the same, which is used to simplify the water path structure of the pure water machine and reduce costs while ensuring the control of the pure water flow rate. At the same time, the excess water can be refluxed for secondary filtration to ensure the normal operation of the entire system.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] A multi-purpose pump comprises a pump head body, wherein the pump head body is provided with a first water inlet channel and a second water inlet channel, a boosting chamber and a water outlet chamber which are mutually connected, the first water inlet channel and the water outlet chamber are connected with the water inlet and the water outlet respectively, and further comprises a negative pressure valve seat, wherein a vacuum chamber is provided in the negative pressure valve seat, and a water inlet chamber is further provided in the pump head body, the vacuum chamber is connected with the water inlet chamber through a fourth water inlet channel, and the water inlet chamber is connected with the boosting chamber through a one-way water flow control structure, a reflux chamber and a reflux outlet which is connected with the reflux chamber are further provided in the pump head body, and the water path connecting the second water inlet channel, the vacuum chamber and the reflux chamber is constituted with a first water sealing convex ring and a second water sealing convex ring and a water-cutting assembly which controls the sealing or conduction of the water path at the two water sealing convex rings.

[0007] Some related components of the existing water supply pumps only have the function of cutting off the water flow, and do not have the function of adjusting the output flow under the condition of a pressurized water source. Only when used in conjunction with the flow control valve can the water flow regulation function be achieved. This complicates the structure of the water channel. At the same time, excess water cannot flow back and will accumulate in the pump for a long time. This solution sets a vacuum chamber connected to the fourth flow channel in the negative pressure valve seat. When the multi-purpose pump is not working, the water-cutting component controls the sealing of the water channel at the first water-sealing convex ring and the second water-sealing convex ring. When the multi-purpose pump is working, the air in the vacuum chamber is sucked away to form a certain degree of vacuum. At this time, the water-cutting component controls the conduction of the water channel at the first water-sealing convex ring and the second water-sealing convex ring. Most of the water enters the vacuum chamber and is discharged from the water outlet, and a small amount of water enters the reflux chamber. , and is transported to other waterways by the reflux outlet. The flow rate after conduction is related to the vacuum degree in the vacuum chamber. The higher the vacuum degree, the greater the flow rate after conduction, and the smaller the vacuum degree, the smaller the flow rate after conduction. Adjusting the working voltage (power) of the multi-purpose pump can adjust the vacuum degree in the vacuum chamber when the multi-purpose pump is working. Therefore, the structural design of this scheme is adopted, and its output flow rate can be adjusted by adjusting the working voltage of the multi-purpose pump. In this way, the multi-purpose pump not only has a water cut-off function, but also can adjust the output flow rate. There is no need to install other flow control components on the waterway, and it can achieve the time flow control function, simplify the structure of the system, save costs, and at the same time, the excess water inside will flow back, and will no longer accumulate in the pump to form pressure, thereby ensuring the normal operation of the entire system.

[0008] Preferably, the water cut-off assembly includes a control rod, A return spring, a sensing diaphragm, and a peripheral seal of the sensing diaphragm are fixed between the negative pressure valve seat and the valve cover. The sensing diaphragm and the valve cover form an atmospheric cavity, and the valve cover is provided with an atmospheric hole. The first water-sealing convex ring is provided at the middle position of the control rod, and the second water-sealing convex ring is provided at the downward extending end of the control rod. The side wall of the control rod is provided with a flow limiting groove located above the first water-sealing convex ring, and a water flow groove concave between the first water-sealing convex ring and the second water-sealing convex ring. A supporting collar is provided on the outer side of the water flow groove, which is clamped between the negative pressure valve seat and the pump head body. The supporting collar is provided with a third water flow channel connected to the second water inlet flow channel. The third water inlet flow channel is connected to the water flow groove. One end of the control rod is connected to a pressure plate located on the bottom surface of the sensing diaphragm, and the other end extends to the reflux chamber. One end of the return spring acts on the pressure plate, and the other end acts on the inner wall of the vacuum chamber. The control rod controls the water path between the water flow groove and the reflux chamber, and between the flow limiting groove and the vacuum chamber under the combined action of the air pressure in the atmospheric chamber, the pressure in the vacuum chamber, and the return spring.

[0009] Preferably, a first sealing ring is provided around the periphery of the first water-sealing convex ring to seal the third water inlet channel. The first sealing ring is tightly disposed within the groove formed between the support collar and the negative pressure valve seat. The first sealing ring enhances the sealing effect at the first water-sealing convex ring, thereby preventing water from entering the vacuum chamber when the multi-purpose pump is not operating, thereby enhancing the sealing performance.

[0010] Preferably, a second sealing ring is provided around the second water sealing convex ring to seal the third water inlet channel. The second sealing ring is tightly disposed within the groove formed between the support collar and the pump head body. The second sealing ring provides a better sealing effect at the second water sealing convex ring, thereby preventing water from entering the reflux chamber when the multi-purpose pump is not operating, thereby enhancing sealing performance.

[0011] Preferably, the pump head body and the negative pressure valve seat are detachably connected by fastening screws, and a positioning ring composed of the pump head body is provided on the pump head body. The positioning ring is located on the outside of the first water inlet channel, and a third sealing ring is pressed in the groove formed between the positioning ring and the negative pressure valve seat, thereby enhancing the sealing performance of the connection between the pump head body and the negative pressure valve seat.

[0012] Preferably, a fourth sealing ring is sleeved on the outer side of the fourth water inlet channel, and the fourth sealing ring is sealingly arranged between the pump head body and the negative pressure valve seat body, further enhancing the sealing performance between the pump head body and the negative pressure valve seat.

[0013] Preferably, the boost chamber is connected to the water outlet chamber through a one-way water flow control structure.

[0014] A clean hot water system composed of the above-mentioned multi-purpose pump includes a heating unit, a reverse osmosis membrane group, and a pre-treatment filter element. The water outlet of the heating unit is connected to a hot and cold water tap, and a control component is provided on the hot and cold water tap. The water inlet of the hot and cold water tap is connected to a first one-way joint. The water inlet of the pre-treatment filter element is connected to a pressure reducing valve. The water outlet of the pre-treatment filter element is connected to a first solenoid valve and a booster pump. The water outlet of the booster pump is connected to the water inlet of the reverse osmosis membrane group. The clean water outlet of the reverse osmosis membrane group is connected to the water inlet of the first one-way joint. The concentrated water outlet is connected to the backwash solenoid valve. The water inlet end is connected to the water outlet of the multi-purpose pump, the water inlet of the multi-purpose pump is connected to the water outlet end of the first one-way joint, the reflux outlet of the multi-purpose pump is connected to the second one-way joint, the water outlet end of the second one-way joint is connected to the water outlet end of the pretreatment filter element, the control component is a first electric control component, and the start and stop of the multi-purpose pump are controlled by the first electric control component. The multi-purpose pump can control the water inlet flow entering the heating unit, thereby better controlling the water temperature after heating to meet the requirements. At the same time, excess water can flow back to the reverse osmosis membrane group for secondary filtration, so that the residual water in the multi-purpose pump will not accumulate, thereby ensuring the normal operation of the whole machine.

[0015] Preferably, a high-pressure switch and a cold water faucet are provided on the water path between the first one-way joint and the reverse osmosis membrane group. The control component is a knob, and cold water is directly discharged from the cold water faucet. When the knob is turned, the multi-purpose pump starts working, and the clean water is pumped from the water outlet of the multi-purpose pump to the heating unit for heating, and then discharged from the faucet. The multi-purpose pump can well control the amount of water entering the heating unit without installing a flow control valve, and can ensure that the heated water temperature meets the standard under a certain heating power, thereby simplifying the water path structure and saving construction costs.

[0016] Preferably, the water outlet end of the first one-way joint is also connected to a second solenoid valve, which is connected to the hot and cold water taps. The control component is a second electrical control component, which is provided with a cold water button, a hot water button, and a stop button. When the cold water button is pressed, the multi-purpose pump is in a stopped working state, and the clean water will not be heated by the heating unit, but will flow out directly from the hot and cold water taps; when the hot water button is pressed, the multi-purpose pump starts working, and the clean water is pumped from the water outlet of the multi-purpose pump to the heating unit for heating, and then discharged from the hot and cold water taps. The multi-purpose pump can well control the amount of water entering the heating unit without installing a flow control valve, and can ensure that the heated water temperature meets the standard under a certain heating power, thereby simplifying the water channel structure and saving construction costs.

[0017] The present invention has the beneficial effects:

[0018] 1. When the multi-purpose pump of this scheme is not working, the water cut-off component has the function of cutting off the water; when the multi-purpose pump is working, the output flow of the multi-purpose pump can be adjusted by adjusting the working voltage (power) of the multi-purpose pump. There is no need to add extra flow control valves to control the flow, which simplifies the water channel structure of the entire system and saves construction costs. At the same time, the excess water in the multi-purpose pump flows back to the reverse osmosis membrane group through the reflux outlet for secondary filtration, and no more accumulation and pressure buildup in the pump is guaranteed, thus ensuring the normal operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of Examples 1-4 of this scheme;

[0020] Figure 2 This is a schematic diagram of the structure of Examples 1-4 of this scheme;

[0021] Figure 3 This is a schematic diagram of the structure of Examples 1-4 of this scheme;

[0022] Figure 4 This is a schematic diagram of the structure of Examples 1-4 of this scheme;

[0023] Figure 5 This is a schematic structural diagram of Example 5 of this solution;

[0024] Figure 6 This is a schematic structural diagram of Example 6 of this solution;

[0025] Figure 7 This is a structural diagram of Example 7 of this scheme.

[0026] Figure numerals: 01-water inlet, 02-reflux chamber, 03-first water inlet channel, 04-positioning collar, 05-second water inlet channel, 06-third water inlet channel, 07-atmospheric cavity, 08-water trough, 09-flow limiting groove, 10-valve cover, 11-air hole, 12-control rod, 13-reset spring, 14-first sealing ring, 15-pressure plate, 16-vacuum chamber, 17-third sealing ring, 18-support collar, 19-second sealing ring, 20-pump head body, 21-negative pressure valve seat, 22-second water sealing convex ring, 23-first water sealing convex ring, 24-fourth water inlet channel, 25 -Fourth sealing ring, 26-sealing water ring, 27-water inlet chamber, 28-water outlet, 29-sensing diaphragm, 30-reflux outlet, 31-pressure reducing valve, 32-first solenoid valve, 33-boosting pump, 34-second one-way connector, 35-multi-purpose pump, 36-heating unit, 37-second electric control unit, 38-second solenoid valve, 39-first one-way connector, 40-reverse osmosis membrane group, 41-flushing solenoid valve, 42-pretreatment filter element, 43-first electric control unit, 44-cold water faucet, 45-high pressure switch, 46-boosting chamber, 47-water outlet chamber, 48-fastening screw, 49-knob. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "having," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0030] Example 1

[0031] A multi-purpose pump includes a pump head body 20, in which a first water inlet channel 03 and a second water inlet channel 05, a boosting chamber 46 and a water outlet chamber 47 that are interconnected are provided. The first water inlet channel 03 and the water outlet chamber 47 are connected to the water inlet 01 and the water outlet 28 respectively. The pump also includes a negative pressure valve seat 21, in which a vacuum chamber 16 is provided. A water inlet chamber 27 is also provided in the pump head body 20. The vacuum chamber 16 is connected to the water inlet chamber 27 through a fourth water inlet channel 24, and the water inlet chamber 27 is connected to the boosting chamber 46 through a one-way water flow control structure. A reflux chamber 02 and a reflux outlet 30 that is connected to the reflux chamber 02 are also provided in the pump head body 20. The water path connecting the second water inlet channel 05 and the vacuum chamber 16 and the reflux chamber 02 is composed of a first water sealing convex ring 23 and a second water sealing convex ring 22 and a water-cutting component that controls the sealing or conduction of the water path at the two water sealing convex rings.

[0032] This embodiment is applicable to pressurized or non-pressurized water sources. When the multi-purpose pump 35 is not working, the water cut-off component controls the water channel sealing at the first water sealing convex ring 23 and the second water sealing convex ring 22. When the multi-purpose pump 35 is working, the air in the vacuum chamber 16 is sucked away to form a certain vacuum degree. At this time, the water cut-off component controls the water channel at the first water sealing convex ring 23 and the second water sealing convex ring 22 to be connected. Most of the water enters the vacuum chamber 16 and is discharged from the water outlet 28. A small amount of water enters the reflux chamber 02 and is transported to other water channels by the reflux outlet 30. The flow rate after connection is related to the vacuum degree in the vacuum chamber 16. The higher the vacuum degree, the higher the flow rate after connection. The larger the value, the smaller the vacuum degree, and the smaller the flow rate after conduction. Adjusting the working voltage (power) of the multi-purpose pump 35 can adjust the vacuum degree in the vacuum chamber 16 when the multi-purpose pump 35 is working. Therefore, the structural design of this scheme is adopted. By adjusting the working voltage of the multi-purpose pump 35, its output flow rate can be adjusted. In this way, the multi-purpose pump 35 not only has a water cut-off function, but also can adjust the output flow rate. There is no need to install other flow control components on the water path, and it can achieve the time flow control function, simplify the structure of the system, save costs, and at the same time, the excess water inside will flow back and will no longer accumulate in the pump to form pressure, thereby ensuring the normal operation of the entire system.

[0033] Example 2

[0034] The water cut-off assembly includes a control rod 12, a return spring 13, and a sensing diaphragm 29. The periphery of the sensing diaphragm 29 is sealed and fixed between the negative pressure valve seat 21 and the valve cover 10. The sensing diaphragm 29 and the valve cover 10 form an atmospheric cavity 07, and the valve cover 10 is provided with an atmospheric hole 11; the first water sealing convex ring 23 is provided in the middle of the control rod 12, the second water sealing convex ring 22 is provided at the downward extending end of the control rod 12, the side wall of the control rod 12 is provided with a flow limiting groove 09 located above the first water sealing convex ring 23, and a concave water groove 08 located between the first water sealing convex ring 23 and the second water sealing convex ring 22. The outer side of the water groove 08 is provided with a clamping connection between the negative pressure valve seat 21 and the pump head body 20 The supporting collar 12 is provided with a third water inlet channel 06 which is connected to the second water inlet channel 05. The third water inlet channel 06 is connected to the water channel 08. One end of the control rod 12 is connected to the pressure plate 15 located on the bottom surface of the sensing diaphragm 29, and the other end extends to the reflux chamber 02; one end of the return spring 13 acts on the pressure plate 15, and the other end acts on the inner wall of the vacuum chamber 16. The control rod 12 controls the water path between the water channel 08 and the reflux chamber 02, and between the flow limiting groove 09 and the vacuum chamber 16 to be connected or blocked under the joint action of the air pressure in the atmospheric chamber 07, the pressure in the vacuum chamber 16, and the return spring 13.

[0035] A first sealing ring 14 is provided around the periphery of the first water-sealing convex ring 23, forming a seal connection with the third water inlet channel 06. The first sealing ring 14 is tightly seated within the groove formed between the support collar 18 and the negative pressure valve seat 21. The first sealing ring 14 enhances the sealing effect at the first water-sealing convex ring 23. Thus, when the multi-purpose pump 35 is not operating, water is less likely to enter the vacuum chamber 16, thereby enhancing the sealing performance.

[0036] A second sealing ring 19 is provided around the second water-sealing protrusion 22, forming a seal connection with the third water inlet passage 06. The second sealing ring 19 is compressed within the groove formed between the support collar 18 and the pump head body 20. The second sealing ring 19 enhances the sealing effect of the second water-sealing protrusion 22. This prevents water from entering the reflux chamber 02 when the multi-purpose pump 35 is not operating, thereby enhancing the sealing performance.

[0037] The working principle of this embodiment is as follows: when the multi-purpose pump 35 is not working, the sum of the pressure in the vacuum chamber 16 and the elastic force of the return spring 13 acting on the sensing diaphragm 29 is greater than the force of the air pressure in the atmospheric chamber 07 on the sensing diaphragm 29, and the control rod 12 will not move up and down, so that the first water sealing convex ring 23 and the first sealing ring 14, the second water sealing convex ring 22 and the second sealing ring 19 work together to seal the water path between the flow limiting groove 09 and the third water inlet channel 06, the water groove 08 and the reflux chamber 02; when the multi-purpose pump 35 is working, the air in the vacuum chamber 16 is sucked away to form a certain vacuum degree. At this time, the sum of the pressure in the vacuum chamber 16 and the elastic force of the return spring 13 acting on the sensing diaphragm 29 is less than Due to the force of the air pressure in the atmospheric cavity 07 on the sensing diaphragm 29, the control rod 12 moves downward (in the direction of the reflux chamber 02) under the combined action of the above forces. The side wall of the control rod 12 is provided with a flow limiting groove 09 located above the first water sealing convex ring 23, and the downward extending end of the control rod 12 is provided with a water groove 08. The water groove 08 is located between the two water sealing convex rings, and the water groove 08 is connected to the third water inlet channel 06. When the first water sealing convex ring 23 just passes over the first sealing ring 14 and the second water sealing convex ring 22 just passes over the second sealing ring 19, the control rod 12 continues to move downward. At this time, the third water inlet channel 06 is connected to the vacuum chamber 16 through the flow limiting groove 09, and the water groove 08 is connected to the reflux chamber 02. When the flow-limiting groove 09 of the control rod 12 has just moved down to the third water inlet channel 06, the flow channel of the third water inlet channel 06 connected to the vacuum chamber 16 through the flow-limiting groove 09 is smaller, and the flow rate pumped out by the multi-purpose pump 35 will be smaller. If the control rod 12 continues to move downward, the part of the control rod 12 with the flow-limiting groove 09 moves down a longer distance into the third flow channel, then the flow channel area of ​​the third flow channel connected to the vacuum chamber 16 through the flow-limiting groove 09 will increase, and the flow rate pumped out by the multi-purpose pump 35 will increase. At this time, the third flow channel is connected to the vacuum chamber 16 through the water groove 08. The area of ​​the flow channel connected to the reflux chamber 02 is reduced, and the amount of reflux water will be reduced. Therefore, by adjusting the working voltage (power) of the multi-purpose pump 35, the size of the vacuum in the vacuum chamber 16 can be adjusted, and then the distance that the control rod 12 moves downward can be adjusted to adjust the output flow of the multi-purpose pump 35. There is no need to add a flow control valve to the system water path, which simplifies the system water path components, simplifies the process, saves construction costs, and at the same time, the excess water can be refluxed for secondary filtration to avoid the accumulation of residual water, thereby ensuring the normal operation of the entire system.

[0038] Example 3

[0039] The pump head body 20 and the negative pressure valve seat 21 are detachably connected by fastening screws 48. The pump head body 20 is provided with a positioning ring 04 composed of the main body of the pump head body 20. The positioning ring 04 is located on the outside of the first water inlet channel 03. The third sealing ring 17 is pressed in the groove formed between the positioning ring 04 and the negative pressure valve seat 21, thereby enhancing the sealing performance of the connection between the pump head body 20 and the negative pressure valve seat 21.

[0040] Example 4

[0041] A fourth sealing ring 25 is sleeved on the outer side of the fourth water inlet channel 24 . The fourth sealing ring 25 is sealingly arranged between the pump head body 20 and the negative pressure valve seat 21 , further enhancing the sealing performance between the pump head body 20 and the negative pressure valve seat 21 .

[0042] The boost chamber 46 is connected to the water outlet chamber 47 via a one-way water flow control structure.

[0043] Example 5

[0044] A clean hot water system composed of the above-mentioned multi-purpose pump includes a heating unit 36, a reverse osmosis membrane group 40, and a pre-treatment filter element 42. The water outlet of the heating unit 36 ​​is connected to a hot and cold water tap, and a control component is provided on the hot and cold water tap. The water inlet of the hot and cold water tap is connected to a first one-way joint 39, the water inlet of the pre-treatment filter element 42 is connected to a pressure reducing valve 31, the water outlet of the pre-treatment filter element 42 is connected to a first solenoid valve 32 and a booster pump 33, the water outlet of the booster pump 33 is connected to the water inlet of the reverse osmosis membrane group 40, the clean water outlet of the reverse osmosis membrane group 40 is connected to the water inlet of the first one-way joint 39, the concentrated water outlet is connected to the backwash solenoid valve 41, and the inlet of the heating unit 36 ​​is connected to the water inlet of the first one-way joint 39. The water end is connected to the water outlet 28 of the multi-purpose pump 35, the water inlet 01 of the multi-purpose pump 35 is connected to the water outlet end of the first one-way joint 39, the reflux outlet 30 of the multi-purpose pump 35 is connected to the second one-way joint 34, the water outlet end of the second one-way joint 34 is connected to the water outlet end of the pretreatment filter element 42, and the control component is the first electric control component 43. The start and stop of the multi-purpose pump 35 is controlled by the first electric control component 43. The multi-purpose pump 35 can control the water inlet flow entering the heating unit 36, so as to better control the water temperature after heating to meet the requirements. At the same time, the excess water can flow back to the reverse osmosis membrane group 40 for secondary filtration, so that the residual water in the multi-purpose pump 35 will not accumulate, thereby ensuring the normal operation of the whole machine.

[0045] Example 6

[0046] Different from the above embodiment, in this embodiment, a high-pressure switch 45 and a cold water tap 44 are provided on the water path between the first one-way joint 39 and the reverse osmosis membrane group 40. The control member is a knob 49, and cold water is directly discharged from the cold water tap 44. When the knob 49 is turned, the multi-purpose pump 35 starts working, and the clean water is pumped from the water outlet 28 of the multi-purpose pump 35 to the heating unit 36 ​​for heating, and then discharged from the faucet. The multi-purpose pump 35 can well control the water inlet into the heating unit 36 ​​without installing a flow control valve, and can ensure that the heated water temperature meets the standard under a certain heating power, thereby simplifying the water path structure and saving the cost.

[0047] Example 7

[0048] Different from the above embodiment, in this embodiment, a second solenoid valve 38 is further connected to the water outlet end of the first one-way joint 39, and the second solenoid valve 38 is connected to the hot and cold taps. The control component is a second electric control unit 37, and the second electric control unit 37 is provided with a cold water button, a hot water button, and a stop button. When the cold water button is pressed, the multi-purpose pump 35 is in a stopped working state, and the clean water will not be heated by the heating unit 36, but will flow out directly from the hot and cold taps; when the hot water button is pressed, the multi-purpose pump 35 starts working, and the clean water is pumped from the water outlet 28 of the multi-purpose pump 35 to the heating unit 36 ​​for heating, and then discharged from the hot and cold taps. The multi-purpose pump 35 can well control the water inlet into the heating unit 36 ​​without installing a flow control valve, and can ensure that the heated water temperature meets the standard under a certain heating power, thereby simplifying the water channel structure and saving construction cost.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A clean hot water system, comprising a heating unit (36), a reverse osmosis membrane group (40), and a pre-treatment filter element (42), wherein the water outlet of the heating unit (36) is connected to a hot and cold water tap, a control component is provided on the hot and cold water tap, the water inlet of the hot and cold water tap is connected to a first one-way joint (39), the water inlet of the pre-treatment filter element (42) is connected to a pressure reducing valve (31), the water outlet of the pre-treatment filter element (42) is connected to a first solenoid valve (32) and a booster pump (33), the water outlet of the booster pump (33) is connected to the water inlet of the reverse osmosis membrane group (40), the clean water outlet of the reverse osmosis membrane group (40) is connected to the water inlet of the first one-way joint (39), and the concentrated water outlet is connected to the backwash solenoid valve (41), characterized in that: The water inlet of the heating unit (36) is connected to the water outlet (28) of the multi-purpose pump (35), the water inlet (01) of the multi-purpose pump (35) is connected to the water outlet of the first one-way joint (39), the reflux outlet (30) of the multi-purpose pump (35) is connected to the second one-way joint (34), the water outlet of the second one-way joint (34) is connected to the water outlet of the pre-treatment filter element (42), and the control component is a first electric control component (43); The multi-purpose pump (35) includes a pump head body (20), wherein the pump head body (20) is provided with a first water inlet channel (03) and a second water inlet channel (05) that are in communication with each other, a pressure boosting chamber (46), and a water outlet chamber (47), wherein the pressure boosting chamber (46) is connected to the water outlet chamber (47) via a one-way water flow control structure, and the first water inlet channel (03) and the water outlet chamber (47) are connected to the water inlet (01) and the water outlet (28) respectively. The multi-purpose pump (35) is characterized in that it further includes a negative pressure valve seat (21), wherein the negative pressure valve seat (21) is provided with a vacuum chamber (16), and the pump head body (20) is further provided with The water inlet chamber (27) and the vacuum chamber (16) are connected to the water inlet chamber (27) through the fourth water inlet channel (24), and the water inlet chamber (27) is connected to the boosting chamber (46) through a one-way water flow control structure. The pump head body (20) is further provided with a reflux chamber (02) and a reflux outlet (30) connected to the reflux chamber (02). The water path connecting the second water inlet channel (05) with the vacuum chamber (16) and the reflux chamber (02) is provided with a first water sealing convex ring (23) and a second water sealing convex ring (22) and a water cut-off component for controlling the sealing or conduction of the water path at the two water sealing convex rings. The water cut-off assembly comprises a control rod (12), a return spring (13), and a sensing diaphragm (29). The sensing diaphragm (29) is sealed and fixed between the negative pressure valve seat (21) and the valve cover (10). The sensing diaphragm (29) and the valve cover (10) form an air chamber (07), and the valve cover (10) is provided with an air hole (11). The first water sealing convex ring (23) is provided at the middle position of the control rod (12), the second water sealing convex ring (22) is provided at the downward extension end of the control rod (12), the side wall of the control rod (12) is provided with a flow limiting groove (09) located above the first water sealing convex ring (23), and a water passing groove (08) concave between the first water sealing convex ring (23) and the second water sealing convex ring (22), and the outer side of the water passing groove (08) is provided with a clamping member connected between the negative pressure valve seat (21) and the pump head body (20). A supporting collar (18) is provided on the supporting collar (18), and a third water inlet channel (06) is provided on the supporting collar (18) and is communicated with the second water inlet channel (05). The third water inlet channel (06) is communicated with the water trough (08). One end of the control rod (12) is connected to the pressure plate (15) located on the bottom surface of the sensing diaphragm (29), and the other end extends to the reflux chamber (02). One end of the return spring (13) acts on the pressure plate (15), and the other end acts on the inner wall of the vacuum chamber (16). The control rod (12) controls the water passage between the water trough (08) and the reflux chamber (02), and between the flow limiting groove (09) and the vacuum chamber (16) under the combined action of the air pressure in the atmospheric chamber (07), the pressure in the vacuum chamber (16), and the return spring (13). The pump head body (20) and the negative pressure valve seat (21) are detachably connected via a fastening screw (48). The pump head body (20) is provided with a positioning collar (04) formed by the main body of the pump head body (20). The positioning collar (04) is located outside the first water inlet channel (03). A third sealing ring (17) is pressed tightly into a groove formed between the positioning collar (04) and the negative pressure valve seat (21).

2. A clean hot water system according to claim 1, characterized in that: A high-pressure switch (45) and a cold water tap (44) are provided on the water path between the first one-way joint (39) and the reverse osmosis membrane group (40), and the control element is a knob (49).

3. A clean hot water system according to claim 1, characterized in that: The water outlet end of the first one-way joint (39) is also connected to a second solenoid valve (38), the second solenoid valve (38) is connected to the hot and cold water taps, and the control component is a second electric control component (37).

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