Water Purifier

Abstract

The utility model provides a water purifier, which has a raw water inlet, a water intake and a drain outlet. The water purifier includes a booster pump, a filter device and a wastewater combination valve. The water inlet of the booster pump is connected to the raw water inlet. The filter device includes a raw water inlet, a clean water outlet and a concentrated water outlet. The water outlet of the booster pump is connected to the raw water inlet of the filter device, and the clean water outlet of the filter device is connected to the water intake. The wastewater combination valve is arranged in series between the concentrated water outlet and the drain outlet of the filter device. The wastewater combination valve includes a wastewater solenoid valve and a wastewater ratio valve, and the wastewater ratio valve is arranged on the wastewater solenoid valve or connected in parallel with the wastewater solenoid valve. Among them, the wastewater solenoid valve is opened when the booster pump stops working. Opening the wastewater solenoid valve can quickly release the pressure in the filter device through the wastewater solenoid valve, so as to prevent the concentrated water from slowly flowing out of the drain outlet of the water purifier after the user finishes taking water, and avoid the water purifier from generating noise for a long time and continuously after the water purifier stops working.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a water purifier. Background Art

[0002] As people's quality of life continues to improve, water purifiers have become common household appliances. Water purifiers can usually be connected to municipal tap water and provide purified water to users. Water purifiers filter out harmful bacteria, viruses, heavy metals and other substances, which are more beneficial to health.

[0003] Some water purifiers on the market use reverse osmosis membrane filters. Reverse osmosis membrane filters are a process that uses a pressure higher than the osmotic pressure as a driving force, and utilizes the selective permeability of the selective membrane that can only pass water but not solutes to separate water molecules from solutes in the water body. In order to achieve the pressure required for reverse osmosis, water purifiers using reverse osmosis membrane filters often need to be equipped with a booster pump for boosting pressure. The membrane pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in the water. In addition, the reverse osmosis membrane filter will directly discharge the filtered impurities out of the water purifier in the form of concentrated water.

[0004] However, in actual application, after the user has finished taking water, the concentrated water outlet of the water purifier still slowly flows out concentrated water for a long time. The continuous outflow of concentrated water will continue to generate noise, and the user experience is poor. Utility Model Content

[0005] In order to at least partially solve the problems existing in the prior art, the utility model provides a water purifier having a raw water inlet, a water intake and a drain outlet. The water purifier includes a booster pump, a filter device and a wastewater combination valve. The water inlet of the booster pump is connected to the raw water inlet. The filter device includes a raw water inlet, a clean water outlet and a concentrated water outlet. The water outlet of the booster pump is connected to the raw water inlet of the filter device, and the clean water outlet of the filter device is connected to the water intake. The wastewater combination valve is arranged in series between the concentrated water outlet and the drain outlet of the filter device. The wastewater combination valve includes a wastewater solenoid valve and a wastewater ratio valve, and the wastewater ratio valve is arranged on the wastewater solenoid valve or in parallel with the wastewater solenoid valve. Among them, the wastewater solenoid valve is opened when the booster pump stops working.

[0006] In the solution of the present application, after the water purifier stops making water, that is, the booster pump stops working, the wastewater solenoid valve is opened, for example, for a few seconds. In this way, the pressure in the filter device can be quickly released through the wastewater solenoid valve, preventing the concentrated water from slowly flowing out of the drain outlet of the water purifier after the user has finished taking water, and avoiding the long-term and continuous noise generation after the water purifier stops. In addition, timely releasing the pressure in the filter device can also avoid the problem that after the booster pump stops working, the pressure causes the clean water outlet of the filter device to leak.

[0007] Exemplarily, the water purifier further includes a controller, which is electrically connected to the wastewater solenoid valve, and the controller is used to control the wastewater solenoid valve to open when the booster pump stops working. By controlling the wastewater solenoid valve through the controller, additional logic for controlling the opening and closing of the wastewater solenoid valve can be set.

[0008] Exemplarily, the wastewater solenoid valve is a normally closed solenoid valve, and the controller is also used to start accumulating time when the wastewater solenoid valve is opened, and control the wastewater solenoid valve to close when the accumulated time reaches a preset threshold. The wastewater solenoid valve will continue to consume power when it is open, and the coil will heat up. The controller can start timing when the wastewater solenoid valve is opened, and control the wastewater solenoid valve to close when the accumulated time reaches a preset time threshold. In this way, no power consumption or heat generation will continue, extending the service life of the wastewater solenoid valve and the circuit that controls its opening.

[0009] Exemplarily, the water purifier also includes a water inlet solenoid valve, which is connected between the water inlet of the booster pump and the raw water inlet. The controller is also used to control the water inlet solenoid valve to close when the booster pump stops working. When the filter device uses a filter element such as a reverse osmosis filter element or a nanofiltration filter element, since such a filter element has a concentrated water outlet, even when the booster pump is turned off, tap water will pass through the booster pump and be discharged from the concentrated water outlet of the filter device. The controller can control the water inlet solenoid valve to close when the booster pump stops working, thereby cutting off the water source. Such a setting can avoid the waste of resources caused by the raw water flowing out of the drain when the water purifier is not working.

[0010] Exemplarily, the water purifier also includes a hot water pipeline, which is connected between the clean water outlet and the water inlet of the filter device. A flow meter and a heating module are provided on the hot water pipeline. The flow meter is used to detect the flow in the hot water pipeline. The controller is used to control the heating module to stop working when the flow is zero. When the water purifier stops making water, that is, when the booster pump stops working, the water flow in the hot water pipeline will not stop immediately because there is still water pressure in the filter device. At this time, the flow meter can also detect water flow information. The controller controls the heating module to continue working, so that the water passing through the heating module after the booster pump stops working will also be heated by the heating module, ensuring that the temperature of the hot water flowing out of the water inlet can still meet the user's requirements. In addition, it can also prevent the heating module from continuing to heat the pure water after the pure water in the hot water pipeline stops flowing, generating high-temperature water vapor or even dry burning, damaging the hot water pipeline and the components located on the hot water pipeline.

[0011] Exemplarily, the heating module includes a flow control pump disposed on the hot water pipeline and a heating body for heating the hot water pipeline. In this way, the flow control pump can adjust the water flow through the hot water pipeline, thereby making the water temperature at the water intake reach the target water intake temperature.

[0012] Exemplarily, a zero-pressure valve located upstream of the flow meter is also provided on the hot water pipeline. The zero-pressure valve provided upstream of the flow control pump can provide a stable water inlet pressure for the flow control pump, thereby ensuring the stability of the water intake flow and the hot water temperature at the water intake. The present application can also protect the zero-pressure valve by controlling the wastewater solenoid valve to open when the booster pump stops working to release the pressure in the filter device.

[0013] Exemplarily, the water purifier further includes a reflux pipeline, the water inlet of the reflux pipeline is connected to the inlet of the hot water pipeline, the outlet of the water flow pipeline is connected to the inlet of the booster pump, and a check valve is arranged on the reflux pipeline. When the water flow at the purified water outlet of the filter device is greater than the water output pumped by the flow control pump, the excess purified water is returned to the upstream of the booster pump to participate in water production again. By releasing the excess purified water, the pipeline and the water channel components thereon can be protected and the service life can be extended.

[0014] Exemplarily, the water purifier also includes a normal temperature water pipeline, which is connected between the purified water outlet and the water inlet of the filter device. A water outlet solenoid valve is provided on the normal temperature water pipeline, and the water outlet solenoid valve is closed when the booster pump stops working. The normal temperature water pipeline directly uses the pressure in the filter device to transport normal temperature water to the water inlet, which makes the waterway simpler and more efficient, and saves energy. A water outlet solenoid valve can be provided on the normal temperature water pipeline, and the water outlet solenoid valve can be closed when the booster pump stops working. This prevents the user from continuing to leak water from the water inlet due to the pressure in the filter device after receiving the normal temperature water.

[0015] Exemplarily, the water purifier further includes a pre-filter. The water inlet of the pre-filter is connected to the raw water inlet, and the water outlet of the pre-filter is connected to the water inlet of the booster pump. Through the pre-treatment of the pre-filter, the burden of the filter device can be effectively reduced, the overall filtering efficiency can be improved, and the booster pump and the filter device can be protected, extending their service life. The provision of a pre-filter can also reduce the frequent maintenance of the booster pump and the filter device due to poor raw water quality, thereby reducing the user's maintenance costs.

[0016] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0017] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,

[0019] Figure 1 A water circuit diagram of a water purifier according to an exemplary embodiment of the present application is shown;

[0020] The above drawings include the following reference numerals:

[0021] 100, water purifier; 101, raw water inlet; 102, water intake; 103, drain outlet; 1041, hot water pipeline; 1042, normal temperature water pipeline; 105, wastewater pipeline; 106, reflux pipeline; 110, booster pump; 120, filter device; 121, raw water inlet; 122, purified water outlet; 123, concentrated water outlet; 130, check valve; 140, wastewater combination valve; 150, water inlet solenoid valve; 160, pre-filter element; 170, water outlet solenoid valve; 180, zero pressure valve; 190, flow meter; 200, heating module; 210, flow control pump; 220, heating body. DETAILED DESCRIPTION

[0022] In the following description, a large number of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only illustrates preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

[0023] The present application provides a water purifier 100. Figure 1 As shown, the water purifier 100 has a raw water inlet 101, a water intake 102 and a drain 103. The water purifier 100 may also include a booster pump 110, a filter device 120 and a wastewater combination valve 140. The water inlet of the booster pump 110 is connected to the raw water inlet 101, and the raw water can be pressurized. The filter device 120 may include a raw water inlet 121, a clean water outlet 122 and a concentrated water outlet 123, the water outlet of the booster pump 110 is connected to the raw water inlet 121 of the filter device 120, and the concentrated water outlet 123 of the filter device 120 is connected to the drain 103 through the wastewater pipeline 105. Thus, the pressurized raw water can be filtered by the filter device 120, the generated clean water can be discharged from the clean water outlet 122, and the generated concentrated water can be discharged to the outside of the water purifier 100 through the concentrated water outlet 123, the wastewater pipeline 105 and the drain 103 in sequence.

[0024] Exemplarily, the filtering device 120 adapted to the booster pump 110 may include one or more of a nanofiltration filter element and a reverse osmosis filter element. These filter elements will produce a certain proportion of concentrated water when working, and the concentrated water can be discharged from the drain port 103.

[0025] Exemplarily, the wastewater combination valve 140 can be arranged on the wastewater pipeline 105, so that the wastewater combination valve 140 is arranged in series between the concentrated water outlet 123 and the drain outlet 103 of the filter device 120. The wastewater combination valve 140 may include a wastewater solenoid valve and a wastewater ratio valve. The wastewater ratio valve can allow the concentrated water of the filter device 120 to be discharged in a certain proportion during the production of purified water, so that the pressure in the filter device 120 can be maintained to ensure normal water production, and the impurities in the raw water can be discharged in time through the wastewater ratio valve to extend the service life of the filter device 120. Optionally, the wastewater solenoid valve and the wastewater ratio valve can be connected in parallel to each other. Optionally, the wastewater ratio valve and the wastewater solenoid valve can also be integrated together, for example, a water hole can be provided on the valve core of the wastewater solenoid valve or any other suitable position, and the water hole forms the wastewater ratio valve. When the valve core of the wastewater solenoid valve is open, wastewater can pass through the wastewater solenoid valve at a large flow rate; when the valve core of the wastewater solenoid valve is closed, wastewater can only be discharged through the water hole, thereby limiting the flow rate of wastewater. This integrated wastewater ratio valve and wastewater solenoid valve has a more compact structure and higher reliability.

[0026] The inventors found that when the booster pump 110 stops working, if the wastewater solenoid valve is in a closed state, the pressure in the filter device 120 will be gradually and slowly released through the wastewater ratio valve. This will cause the drain port 103 of the water purifier 100 to continue to slowly flow out concentrated water after the user has finished taking water, and this will last for a long time, typically about ten minutes. The continuous outflow of concentrated water will continue to generate noise, and the user experience is poor.

[0027] For example, reference Figure 1 , the booster pump 110 of the water purifier 100 stops working, and the wastewater solenoid valve can be opened. After opening the wastewater solenoid valve, the pressure accumulated in the filter device 120 when the booster pump 110 is working can be quickly released through the wastewater pipeline 105, so as to avoid the problem of slow drainage of the wastewater pipeline 105 for a long time due to the slow release through the wastewater ratio valve. In the scheme of the present application, the wastewater solenoid valve is opened after the water purifier 100 stops making water, that is, the booster pump 110 stops working, for example, for a few seconds. In this way, the pressure in the filter device 120 can be quickly released through the wastewater solenoid valve, avoiding the long-term and continuous noise generation after the water purifier 100 is stopped. In addition, timely releasing the pressure in the filter device 120 can also avoid the problem that the pressure causes the clean water outlet 122 of the filter device 120 to leak after the booster pump 110 stops working.

[0028] After the booster pump 110 of the water purifier 100 stops working, the wastewater solenoid valve can be opened in a variety of ways. For example, after the user stops taking water, the wastewater solenoid valve can be manually opened to release the pressure in the filter device 120.

[0029] In order to reduce the burden on users, illustratively, a normally open wastewater solenoid valve can be provided, which is closed when powered on and opened when powered off. Thus, the wastewater solenoid valve can be connected in series with the booster pump 110 to the power supply. When the user stops taking water, it is usually necessary to operate the water purifier or the faucet, or to select the water intake amount when taking water to determine the time to stop taking water, that is, the closing of the booster pump 110 is a must for the user. The advantage of connecting the wastewater solenoid valve and the booster pump 110 in series to the power supply is that the wastewater solenoid valve can be operated while operating the booster pump 110. Specifically, when the booster pump 110 is working, the booster pump 110 and the wastewater solenoid valve are both connected to the power supply, so the wastewater solenoid valve is closed, and the water purifier 100 can make water normally; when the booster pump 110 stops working, the booster pump 110 and the wastewater solenoid valve are both disconnected from the power supply, so the wastewater solenoid valve is opened. Such an arrangement can ensure that when the booster pump 110 stops working, the pressure in the filter device 120 can be released through the wastewater pipeline 105.

[0030] Exemplarily, the water purifier 100 may further include a controller. The controller may be constructed using electronic components such as a timer, a comparator, a register, a digital logic circuit, or may be implemented using a processor chip such as a single chip microcomputer, a microprocessor, a programmable logic controller (PLC), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic array (PLA), an application specific integrated circuit (ASIC), and its peripheral circuits.

[0031] Exemplarily, the controller is electrically connected to the wastewater solenoid valve, and the controller is used to control the wastewater solenoid valve to open when the booster pump 110 stops working. By controlling the wastewater solenoid valve through the controller, the logic for controlling the opening and closing of the wastewater solenoid valve can be additionally set. For example, after the water purifier 100 has been working for a long time, the filter device 120 needs to be rinsed, and the concentrated water solenoid valve can be opened. At this time, the booster pump 110 starts working, and the raw water can pass through the filter device 120 at a large flow rate and be discharged from the water purifier 100 from the opened concentrated water solenoid valve. At this time, the large flow of raw water can remove impurities deposited in the filter device 120, thereby extending the service life of the filter device 120.

[0032] By way of example, the wastewater solenoid valve currently used is usually a normally closed solenoid valve, which is opened when powered on to allow a larger water flow to pass through. The wastewater solenoid valve will continue to consume electrical energy when it is open, and the coil will generate heat. In order to extend the service life of the wastewater solenoid valve and the circuit that controls its opening, while reducing energy consumption, the controller can start timing when the wastewater solenoid valve is opened, and control the wastewater solenoid valve to close when the accumulated time reaches a preset time threshold. By way of example, the wastewater solenoid valve can be opened for 3-5 seconds. In other words, the above-mentioned preset time threshold can be set to 3-5 seconds. After that, the wastewater solenoid valve is closed, and will not continue to consume electrical energy or generate heat, thereby extending the service life of the wastewater solenoid valve and the circuit that controls its opening.

[0033] For example, reference Figure 1 , the water purifier 100 may also include a water inlet solenoid valve 150, which is connected between the water inlet of the boost pump 110 and the raw water inlet 101. The controller is also used to control the water inlet solenoid valve 150 to close when the boost pump 110 stops working. The water inlet solenoid valve 150 is connected in series between the raw water inlet 101 and the filter device 120. The raw water inlet 101 can be connected to municipal tap water, which has a certain pressure. When the filter device 120 uses a filter element such as a reverse osmosis filter element or a nanofiltration filter element, since such a filter element has a concentrated water outlet 123, even when the boost pump 110 is turned off, tap water will pass through the boost pump 110 and be discharged from the concentrated water outlet 123 of the filter device 120. The controller can control the water inlet solenoid valve 150 to close when the boost pump 110 stops working, thereby cutting off the water source. Such a setting can avoid the waste of resources when the water purifier 100 is not working, when the raw water flows out from the drain 103.

[0034] For example, reference Figure 1The water purifier 100 may also include a hot water pipeline 1041, which may be connected between the clean water outlet 122 of the filter device 120 and the water intake 102. A flow meter 190 and a heating module 200 may be provided on the hot water pipeline 1041. The flow meter 190 may include any suitable flow meter such as a differential pressure flow meter, a rotor flow meter or an electromagnetic flow meter. The flow meter 190 is used to detect the flow in the hot water pipeline 1041. The heating module 200 is used to heat the water in the hot water pipeline 1041. Exemplarily and not restrictively, the heating module 200 may be an instant heating type. The heating module 200 may be a thick film heating body formed on the outer wall of the hot water pipeline 1041. When the water flows through the pipeline section where the thick film heating body is located through high power, rapid heating within 1-3 seconds is achieved, water can be continuously discharged, and temperature control is relatively accurate. Optionally, the heating module 200 may also include a hot tank, in which hot water may be stored, thereby providing a large amount of hot water to the user in a short time with relatively small power. Preferably, the controller may perform feedback regulation on the heating power of the heating module 200 and / or the water flow rate flowing through the heating module 200 according to the flow rate of the hot water pipeline 1041 detected by the flow meter 190, thereby controlling the temperature of the hot water produced by the heating module 200 to achieve the purpose of precise temperature control. Exemplarily, the controller is used to control the heating module 200 to stop working when the flow rate is zero. When the water purifier 100 stops making water, that is, when the booster pump 110 stops working, the water flow in the hot water pipeline 1041 will not stop immediately due to the water pressure still existing in the filter device 120. At this time, the flow meter 190 can also detect the water flow information. The controller controls the heating module 200 to continue working, so that the water passing through the heating module 200 after the booster pump 110 stops working will also be heated by the heating module 200, ensuring that the temperature of the hot water flowing out of the water inlet 102 can still meet the user's requirements. In addition, it can also prevent the heating module 200 from continuing to heat the pure water after the pure water in the hot water pipe 1041 stops flowing, generating high-temperature steam or even dry burning, thereby damaging the hot water pipe 1041 and components located on the hot water pipe 1041.

[0035] For example, reference Figure 1 , the heating module 200 includes a flow control pump 210 arranged on the hot water pipeline 1041 and a heating body 220 for heating the hot water pipeline 1041. The flow control pump 210 can adjust the water flow rate it pumps. Exemplarily, the flow control pump 210 can be a diaphragm pump, and the water flow rate it pumps is positively correlated with the voltage it receives. Since the flow control pump 210 may have consistency differences, the length of time the water purifier 100 is used may also affect the flow accuracy of the flow control pump 210. Therefore, the controller can also be used based on the flow information detected by the flow meter 190 to implement closed-loop control of the flow control pump 210 to improve the flow accuracy.

[0036] Exemplarily, the controller can be used to control the working time of the flow control pump 210 based on the flow information so that the water intake at the water intake 102 reaches the target water intake. The water purifier 100 can obtain the user's target water intake, and the controller can control the flow control pump 210 to pump clean water at a suitable flow rate based on the target water intake, such as at a rated flow rate, and obtain flow information. The controller can obtain flow information in real time, obtain flow information only once, or obtain flow information every time interval (for example, 1 second). According to the flow information, the controller controls the flow control pump 210 to pump clean water at the current flow rate until the time required to reach the target water intake; or adjusts the flow of the flow control pump 210 and the working time of the flow control pump 210 at the same time, so that the amount of water reaching the water intake 102 reaches the target water intake. Exemplarily and not restrictively, it may take time for the flow of the flow control pump 210 to reach stability. The controller can wait for a certain period of time after the flow control pump 210 starts working, and then calculate the working time of the flow control pump 210 according to the flow information, and appropriately compensate the working time to ensure the accuracy of the target water intake. In another exemplary embodiment, the flow meter 190 obtains flow information in real time, and the controller calculates the water volume based on the real-time flow information to control the target water intake, thereby providing the user with normal temperature water or hot water of the target water intake.

[0037] Exemplarily, the controller can also be used to control the pumping flow of the flow control pump 210 and / or the power of the heating pipe based on the flow information, so that the water temperature at the water inlet 102 reaches the target water intake temperature. When the power of the heating body 220 is determined, the water flow through the heating body 220 is negatively correlated with the water outlet temperature of the heating body 220. By controlling the flow control pump 210, the flow of the purified water to be heated can be controlled, thereby coordinating with the power of the heating body 220 to ensure that the output water temperature reaches the target water intake temperature.

[0038] For example, reference Figure 1 , a zero-pressure valve 180 located upstream of the flow meter 190 may also be provided on the hot water pipeline 1041. When the water inlet pressure of the flow control pump 210 fluctuates, the accuracy of its flow control may be reduced. When the heating module 200 is instant heating, the temperature of the hot water may also be unstable. Therefore, the zero-pressure valve 180 provided upstream of the flow control pump 210 can provide a stable water inlet pressure for the flow control pump 210, ensuring the stability of the flow rate of the water intake 102 and the temperature of the hot water at the water intake 102. The present application can also protect the zero-pressure valve 180 by controlling the wastewater solenoid valve to open to release the pressure in the filter device 120 when the booster pump 110 stops working. Specifically, if the pressure in the filter device 120 is high and maintained for a long time, it will cause the clean water outlet 122 of the filter device 120 to also have a high pressure, and this pressure will affect the zero-pressure valve 180.

[0039] As described above, the booster pump 110 of the water purifier 100 stops working, the wastewater solenoid valve is opened, and the concentrated water accumulated in the wastewater pipeline 105 can be quickly discharged. At the same time, the water pressure in the filter device 120 can be released through the wastewater pipeline 105, protecting the zero pressure valve 180.

[0040] Exemplarily, for a water purifier 100 in which the heating module 200 is an instantaneous type, due to the power limitation of the heating module 200, when a user needs to use hot water at a higher temperature, the heating module 200 requires a smaller water flow rate pumped by the flow control pump 210 to heat the water to the temperature required by the user. The water production capacity of the filter device 120 is generally determined by the pumping water pressure of the booster pump 110 and the performance of the filter device 120 itself. In order to meet the operating pressure of the filter device 120, the pumping water pressure of the booster pump 110 generally does not change. Therefore, the water production capacity of the filter device 120 generally does not change. Therefore, when the water flow rate required by the heating module 200 is relatively small, high pressure may accumulate between the clean water outlet 122 of the filter device 120 and the zero-pressure valve 180 (if any) or between the clean water outlet 122 and the flow control pump 210. Continuous high pressure may cause the pipeline to rupture and damage the water path components on the pipeline. Reference Figure 1 For this purpose, a return pipe 106 can be provided between the clean water outlet 122 of the filter device 120 and the water inlet of the booster pump 110, and a check valve 130 is provided on the return pipe 106, so that when the water flow at the clean water outlet 122 of the filter device 120 is greater than the water output pumped by the flow control pump 210, the excess clean water is returned to the upstream of the booster pump 110 to participate in water production again. By releasing the excess clean water, the pipeline and the water channel components thereon can be protected and their service life can be extended.

[0041] For example, reference Figure 1, the water purifier 100 may also include a normal temperature water pipeline 1042 connected between the clean water outlet 122 of the filter device 120 and the water inlet 102. The normal temperature water pipeline 1042 can be connected in parallel with the hot water pipeline 1041, so that the normal temperature water is delivered to the water inlet 102 according to the needs of the user for use by the user. The normal temperature water pipeline 1042 directly uses the pressure in the filter device 120 to transport the normal temperature water to the water inlet 102, and the waterway is simpler and more efficient, while saving energy. The normal temperature water pipeline 1042 may be provided with a water outlet solenoid valve 170, and the water outlet solenoid valve 170 may be closed when the booster pump 110 stops working. Prevent the user from receiving the normal temperature water after the normal temperature water is completed, because there is still pressure in the filter device 120, causing the water to continue to leak from the water inlet 102. Of course, the hot water pipeline 1041 can also be used to directly deliver the unheated clean water to the water inlet 102. Specifically, when the user needs normal temperature water, the controller can control the heating body 220 not to work, and use the flow control pump 210 to pump water to the water intake 102. The hot water pipeline 1041 is used to provide normal temperature water to the user, making the water purifier 100 simpler and more compact.

[0042] For example, reference Figure 1 , the water purifier 100 may also include a pre-filter 160. The water inlet of the pre-filter 160 is connected to the raw water inlet 101, and the water outlet of the pre-filter 160 is connected to the water inlet of the booster pump 110. The pre-filter 160 can remove various impurities and pollutants in the water, such as suspended particles, colloids, organic matter, etc., and provide better water inlet conditions for the booster pump 110 and the filter device 120. Through the pretreatment of the pre-filter 160, the burden of the filter device 120 can be effectively reduced, the overall filtering efficiency can be improved, and the booster pump 110 and the filter device 120 can be protected to extend their service life. The provision of the pre-filter 160 can also reduce the frequent maintenance of the booster pump 110 and the filter device 120 due to poor raw water quality, thereby reducing the user's maintenance costs.

[0043] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0047] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A water purifier having a raw water inlet, a water intake and a drain outlet, characterized in that: The water purifier also includes: A booster pump, wherein the water inlet of the booster pump is connected to the raw water inlet; A filter device, the filter device comprising a raw water inlet, a clean water outlet and a concentrated water outlet, the water outlet of the booster pump is connected to the raw water inlet of the filter device, and the clean water outlet of the filter device is connected to the water intake; A wastewater combination valve, the wastewater combination valve is arranged in series between the concentrated water outlet and the drain outlet of the filtering device, the wastewater combination valve includes a wastewater solenoid valve and a wastewater ratio valve, the wastewater ratio valve is arranged on the wastewater solenoid valve or connected in parallel with the wastewater solenoid valve, wherein the wastewater solenoid valve opens when the booster pump stops working.

2. The water purifier according to claim 1, characterized in that: The water purifier further comprises a controller, which is electrically connected to the wastewater solenoid valve, and is used for controlling the wastewater solenoid valve to open when the booster pump stops working.

3. The water purifier according to claim 2, characterized in that: The wastewater solenoid valve is a normally closed solenoid valve, and the controller is further used to start accumulating time when the wastewater solenoid valve is opened, and to control the wastewater solenoid valve to close when the accumulated time reaches a preset threshold.

4. The water purifier according to claim 2, characterized in that: The water purifier also includes: A water inlet solenoid valve, the water inlet solenoid valve is connected between the water inlet of the booster pump and the raw water inlet, The controller is also used to control the water inlet solenoid valve to close when the booster pump stops working.

5. The water purifier according to claim 2, characterized in that: The water purifier also includes: A hot water pipeline, the hot water pipeline is connected between the purified water outlet and the water intake of the filtering device, a flow meter and a heating module are arranged on the hot water pipeline, the flow meter is used to detect the flow in the hot water pipeline, The controller is used for controlling the heating module to stop working when the flow rate is zero.

6. The water purifier according to claim 5, characterized in that: The heating module comprises: A flow control pump disposed on the hot water pipeline; and A heating body is used to heat the hot water pipeline.

7. The water purifier according to claim 6, characterized in that: The hot water pipeline is also provided with a zero pressure valve located upstream of the flow meter.

8. The water purifier according to claim 5, characterized in that: The water purifier also includes: A reflux pipeline, the water inlet of the reflux pipeline is connected to the inlet of the hot water pipeline, the outlet of the reflux pipeline is connected to the inlet of the booster pump, and a check valve is arranged on the reflux pipeline.

9. The water purifier according to claim 1, characterized in that: The water purifier also includes: A normal temperature water pipeline is connected between the clean water outlet and the water intake of the filtering device. A water outlet solenoid valve is provided on the normal temperature water pipeline, and the water outlet solenoid valve is closed when the booster pump stops working.

10. The water purifier according to claim 1, characterized in that: The water purifier further comprises a pre-filter element, a water inlet of the pre-filter element is connected to the raw water inlet, and a water outlet of the pre-filter element is connected to the water inlet of the booster pump.

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