Water purifier

Abstract

The water purifier is provided with a main water inlet, a main water outlet and a water outlet and further comprises a central filter element, a water inlet electromagnetic valve, a cold container and a heat absorption water tank, the central filter element is provided with a raw water opening, a purified water opening and a concentrated water opening, the raw water opening is connected to the main water inlet through a raw water pipeline, and the purified water opening is connected to the main water outlet; the cold container comprises a cold water cavity and a refrigeration assembly, a water inlet of the cold water cavity is connected to the purified water port through a water supplementing pipeline, a water outlet of the cold water cavity is connected to the main water outlet through a cold water pipeline, and the cold end of the refrigeration assembly can exchange heat with the cold water cavity. A water inlet of the heat absorption water tank is connected to the concentrated water port through a first concentrated water pipeline, a water outlet of the heat absorption water tank is connected to the drainage port through a second concentrated water pipeline, and the hot end of the refrigeration assembly can exchange heat with the heat absorption water tank. Concentrated water is used for water-cooling heat dissipation, the heat dissipation efficiency is improved, and when the water purifier does not produce water, the concentrated water in the heat absorption water tank can be continuously used for refrigeration.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a water purifier. Background Technology

[0002] With the development of the times, people have increasingly higher requirements for drinking water quality, and water purifiers have been widely recognized and purchased. Water purifiers can purify tap water or water in storage tanks to provide users with high-quality clean water. Water purifiers on the market include countertop water purifiers, under-sink water purifiers, and built-in water purifiers. Water purifiers can be placed on countertops or embedded in cabinets, sideboards, or other storage spaces. Built-in water purifiers, because they do not take up countertop space, have become a popular choice.

[0003] Water purifiers that can provide cold water have an internal cooling system. This cooling system needs to dissipate heat during the cooling process, so these types of water purifiers usually also have a high-powered fan to provide sufficient airflow for heat dissipation.

[0004] Water purifiers that use air cooling typically produce more noise when cooling. For built-in water purifiers, which are installed in relatively enclosed spaces, good ventilation may be difficult to achieve. This causes heat to accumulate inside and around the water purifier, affecting its cooling effect. Utility Model Content

[0005] To at least partially address the problems existing in the prior art, some embodiments of this utility model provide a water purifier having a main water inlet, a main water outlet, and a drain outlet, and also including a central filter element having a raw water inlet, a purified water inlet, and a concentrated water inlet. The raw water inlet is connected to the main water inlet via a raw water pipeline, and the purified water inlet is connected to the main water outlet. An inlet solenoid valve is connected in series on the raw water pipeline. A cold tank includes a cold water chamber and a refrigeration component. The inlet of the cold water chamber is connected to the purified water inlet via a water supply pipeline, and the outlet of the cold water chamber is connected to the main water outlet via a cold water pipeline. The cold end of the refrigeration component is capable of heat exchange with the cold water chamber. A hot water tank has its inlet connected to a concentrated water outlet via a first concentrated water pipeline, and its outlet connected to the drain outlet via a second concentrated water pipeline. The hot end of the refrigeration component is capable of heat exchange with the hot water tank. In summary, the above embodiments not only utilize unwanted concentrated water for water cooling, improving heat dissipation efficiency and reducing noise, but also are unaffected by air circulation, resulting in better cooling performance for the water purifier. Simultaneously, the concentrated water can be temporarily stored in the hot water tank, allowing for continued cooling even when the water purifier is not producing water. During water purification, the discharged concentrated water continuously discharges the warmer concentrated water from the hot water tank.

[0006] For example, the water purifier also includes a wastewater ratio solenoid valve connected in series on the first concentrate pipeline. The rapidly discharged raw water can also replace the concentrate in the hot water tank and flush the hot water tank, thereby replacing the concentrate with cooler raw water when the water temperature in the hot water tank is high. Connecting the wastewater ratio solenoid valve in series on the first concentrate pipeline ensures that the pipeline downstream of the wastewater ratio solenoid valve is not under pressure, thus eliminating the need for the hot water tank to be constructed as a pressure-bearing structure.

[0007] For example, the water purifier also includes a wastewater ratio solenoid valve connected in series on the second concentrate pipeline. The rapidly discharged raw water can also replace the concentrate in the hot water tank and flush the hot water tank, thereby replacing the concentrate in the hot water tank with the cooler raw water when the water temperature in the hot water tank is high.

[0008] For example, the hot end of the cooling component includes a heat sink, at least a portion of which extends into the water tank. This increases the contact area between the heat sink and the water, enhancing the heat dissipation effect.

[0009] For example, the inlet of the hot water tank is located at its bottom, and the outlet is located at its top. This ensures that the hot water tank is completely filled with sufficient concentrated water, preventing air bubbles from accumulating. Furthermore, the second concentrated water pipeline does not require a valve for control. During water purification, the concentrated water discharged from the concentrated water outlet continuously enters the hot water tank, pushing out the warmer concentrated water at the top of the tank. This warmer concentrated water can then be discharged through the drain outlet.

[0010] For example, the water purifier also includes a first temperature sensor for detecting the water temperature in the cold water chamber; and a controller, wherein the first temperature sensor and the wastewater ratio solenoid valve are electrically connected to the controller, wherein the controller is used to enter a water exchange mode when the rate of decrease in water temperature in the cold water chamber is less than a preset threshold. In the water exchange mode, the controller controls the wastewater ratio solenoid valve and the inlet solenoid valve to open. The controller can determine whether the water temperature in the hot water tank is too high and affects the operation of the cooling components by using a preset threshold, thereby entering the water exchange mode. After the inlet solenoid valve and the wastewater ratio solenoid valve are opened, under the water pressure of tap water, raw water can enter the hot water tank with less resistance, replacing the concentrated water in the hot water tank with raw water.

[0011] For example, the water purifier further includes: a second temperature sensor for detecting the water temperature in the hot water tank; and a controller, wherein the second temperature sensor and the wastewater ratio solenoid valve are both electrically connected to the controller, and the controller is used to enter a water exchange mode when the water temperature in the hot water tank is higher than a preset temperature, and in the water exchange mode, control the opening of the wastewater ratio solenoid valve and the inlet solenoid valve. Thus, when the water temperature in the hot water tank is too high, the concentrated water in the hot water tank can be discharged or completely replaced by the pressure of the tap water.

[0012] For example, the water purifier also includes a booster pump connected in series on the raw water pipeline; the controller is also used to control the booster pump to shut down in water exchange mode. Optionally, when the booster pump is not working, it can generate a certain resistance to the water flow, thereby preventing a large amount of tap water from flowing out of the concentrate outlet quickly, which is equivalent to a certain flow limiting effect. The raw water after flow limiting can meet the requirement of replacing the water in the hot water tank with water at a lower temperature. When the wastewater ratio solenoid valve is open, almost all the raw water that has not been boosted by the booster pump reaches the concentrate outlet of the central filter element to replace the water in the hot water tank. This can reduce the noise of the water purifier in water exchange mode and reduce energy consumption.

[0013] For example, the water purifier also includes a purified water tank, which is connected in series on the water supply pipe and is positioned above the cold water chamber. When a user needs to draw water, the purified water tank can supply the product. This reduces the number of times the inlet solenoid valve and booster pump need to be started and stopped, extending the lifespan of the water purifier. The purified water tank can also store purified water produced by the central filter when the user is not drawing water, to meet the user's high-flow-rate water needs. Water in the purified water tank can be replenished to the cold water chamber by gravity. The cold water chamber does not require a water level detection component and can automatically fill, preventing dry cooling due to low water levels (corresponding to dry burning of the heating module), and simplifying the control logic.

[0014] For example, the water purifier also includes a water pump and a heating module. The outlet of the purified water tank is connected to the main outlet via a hot water pipe, and the water pump and heating module are connected in series on the hot water pipe. Thus, the water purifier can provide hot water to the user. The water pump can pump water to a height above the water level in the purified water tank, effectively increasing the water flow rate and improving the user experience. Optionally, the water pump can control the flow rate, ensuring that the water dispenser provides the user with a more accurate temperature when the user expects a higher temperature, preventing excessive water flow that results in insufficient heating and a lower outlet temperature.

[0015] For example, the water purifier also includes a pre-filter cartridge, which is connected in series in the raw water pipeline. It is located before the central filter cartridge and is used to perform preliminary filtration on the water entering the central filter cartridge to extend the service life of the central filter cartridge.

[0016] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0017] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings,

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

[0020] Figure 2 Here is a water circuit diagram for a water purifier according to another exemplary embodiment of the present invention;

[0021] Figure 3 This is a water circuit diagram of a water purifier according to another exemplary embodiment of the present invention.

[0022] The above figures include the following reference numerals:

[0023] 10. Main water inlet; 20. Main water outlet; 30. Drain outlet; 110. Central filter element; 111. Raw water inlet; 112. Clean water inlet; 113. Concentrate inlet; 120. Pre-filter element; 200. Raw water pipeline; 210. Booster pump; 220. Inlet solenoid valve; 300. Cold water tank; 310. Cold water chamber; 320. Heat sink; 400. Cold water pipeline; 410. Cold water pump; 5 00. Hot water tank; 510. Inlet of hot water tank; 520. Outlet of hot water tank; 610. First concentrated water pipeline; 620. Second concentrated water pipeline; 630. Wastewater ratio solenoid valve; 640. Check valve; 710. First temperature sensor; 720. Second temperature sensor; 800. Purified water tank; 900. Hot water pipeline; 910. Water pump; 920. Heating module. Detailed Implementation

[0024] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0025] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0026] This utility model provides a water purifier. The water purifier according to an embodiment of this utility model will be described in detail below with reference to the accompanying drawings. Figure 1 As shown, the water purifier has a main inlet 10, a main outlet 20, and a drain outlet 30. The main inlet 10 is used to obtain raw water, such as water from a municipal tap. The water purifier also includes a central filter cartridge 110, which has a raw water inlet 111, a purified water inlet 112, and a concentrated water inlet 113. The raw water inlet 111 is connected to the main inlet 10 via a raw water pipe 200. The purified water inlet 112 is connected to the main outlet 20 to provide the user with purified water filtered by the central filter cartridge 110. The concentrated water inlet 113 is connected to the drain outlet 30, which can be connected to the outside environment to discharge the concentrated water produced by the central filter cartridge 110. Specifically, for example, the drain outlet 30 can be connected to a drain pipe, which can be connected to a sewer or a container for collecting the concentrated water. The user can use the concentrated water in the container for various purposes as needed. The user can reuse the collected concentrated water to save water.

[0027] The central filter element 110 may include reverse osmosis filters, nanofiltration filters, etc. These central filter elements 110 typically require a certain pressure to operate. Although the central filter element 110 can only output purified water at a rated flow rate under rated raw water pressure, this does not mean that it cannot produce purified water under pressures lower than the rated raw water pressure. Generally, the lower limit of municipal tap water pressure is considered to be 0.1 MPa, and the upper limit is no higher than 0.4 MPa. Taking a typical tap water pressure of 0.2-0.3 MPa as an example, this pressure is lower than the pressure that the booster pump 210 can provide (0.6-0.7 MPa). Therefore, under the action of tap water pressure, the central filter element 110 can output purified water at a flow rate of approximately one-third of the rated flow rate. In some embodiments, the water purifier may include a booster pump 210, which can pressurize the raw water to meet the operating pressure of the central filter element 110. In other embodiments, the water purifier may not include a booster pump 210.

[0028] The water purifier may also include a cold tank 300, which may include a cold water chamber 310 (not shown) disposed therein. Optionally, the cold water chamber 310 may have a shape substantially the same as the main body of the cold tank 300, being cubic in shape. Optionally, the cold tank 300 may have tortuous pipes formed inside, and the cold water chamber 310 may have an inner cavity formed by the pipes, thereby increasing the inner surface area of ​​the cold water chamber 310. The cold tank 300 may also include a refrigeration component, which may include a compressor-type refrigeration component, a semiconductor refrigeration component, or other existing or future refrigeration components. Regardless of the type of refrigeration component, heat is generated during the refrigeration process, causing one part of the refrigeration component to form a hot end and the other part to form a cold end. The cold end of the refrigeration component can exchange heat with the cold water chamber 310, thereby cooling the water in the cold water chamber 310. The water inlet of the cold water chamber 310 can be connected to the purified water outlet 112 through a water supply pipe, so that water can be directly supplied from the central filter element 110 when the cold water chamber 310 is short of water. The inlet of the cold water chamber 310 is connected to the main outlet 20 via a cold water pipe 400 through the outlet of the cold water chamber 310. As shown in the figure, a cold water pump 410 can also be installed on the cold water pipe 400. Thus, the water dispenser can provide users with cold water at a temperature below room temperature.

[0029] The water purifier may also include a hot water tank 500. The inlet 510 of the hot water tank 500 is connected to a concentrated water outlet 113 via a first concentrated water pipe 610, and the outlet 520 of the hot water tank 500 is connected to a drain outlet 30 via a second concentrated water pipe 620. Thus, the concentrated water discharged from the concentrated water outlet 113 can be temporarily stored in the hot water tank 500. Optionally, a check valve 640 may be provided on the first concentrated water pipe 610 to prevent concentrated water from flowing back to the central filter element 110. The hot end of the refrigeration component can exchange heat with the hot water tank 500. For refrigeration components using compressor refrigeration with a refrigerant circulation pipe, optionally, the heat dissipation section of the refrigerant circulation pipe (i.e., the aforementioned hot end) can extend into the hot water tank 500. Optionally, the hot water tank 500 can be made of a thermally conductive material, and its surface may have protruding fins; the heat dissipation section of the refrigerant circulation pipe can be embedded in the gaps between these fins. Optionally, the heat dissipation section of the refrigerant circulation pipeline can be connected to the heat-absorbing water tank 500 made of thermally conductive material by means of brazing or other methods. For refrigeration components using semiconductor refrigerators, since semiconductor refrigerators are typically constructed as plates, they have flat heating and cooling ends. A cooling fin can be attached to the cold end, comprising a substrate attached to the flat surface of the cold end of the semiconductor refrigerator and fins extending from the substrate into the cold water chamber 310, thereby increasing the contact area between the cooling fin and the water. Optionally, the hot end of the refrigeration component can include a heat sink 320, at least a portion of which extends into the heat-absorbing water tank 500. Specifically, for example, the heat sink 320 can include a substrate attached to the flat surface of the hot end of the semiconductor refrigerator and fins extending from the substrate into the heat-absorbing water tank 500, thereby increasing the contact area between the heat sink 320 and the water and enhancing the heat dissipation effect. Optionally, the heat sink 320 can also include heat-conducting elements such as heat pipes. Alternatively, the hot water tank 500 can also be constructed from a thermally conductive material as a tank with a flat surface, the flat surface of which is attached to the hot end. For the attachment between the aforementioned flat surfaces, thermally conductive silicone grease or thermally conductive adhesive can also be filled between the two surfaces.

[0030] In summary, the above embodiments not only utilize unwanted concentrated water for water cooling, improving heat dissipation efficiency, but also reduce noise and are unaffected by air circulation, resulting in better cooling performance for the water purifier. Simultaneously, the concentrated water can be temporarily stored in the hot water tank 500, allowing for continued cooling even when the water purifier is not producing water. During water purification, the discharged concentrated water continuously discharges the higher-temperature concentrated water from the hot water tank 500.

[0031] For example, the water purifier may include an inlet solenoid valve 220, which is connected in series on the raw water pipeline 200. The inlet solenoid valve 220 can prevent water from flowing out of the main outlet 20 and the drain outlet 30 under the pressure of municipal tap water when the water purifier is not working.

[0032] like Figure 2 As shown, exemplarily, the water purifier may also include a purified water tank 800, which is connected in series on the water supply pipeline. The purified water tank 800 can store a large amount of purified water produced by the central filter element 110, and can provide the product to the user when they need to draw water. This reduces the number of times the inlet solenoid valve 220 and the booster pump 210 are started and stopped, extending the service life of the water purifier. The water purifier may use a low-flow central filter element 110 (daily water production less than 400 gallons), and the purified water tank 800 can store purified water produced by the central filter element 110 when the user is not drawing water, to meet the user's high-flow-rate water needs. The purified water tank 800 may be higher than the cold water chamber 310. Therefore, the water in the purified water tank 800 can be replenished to the cold water chamber 310 under the action of gravity. The cold water chamber 310 does not need to be equipped with a water level detection component and can be automatically filled. There will be no dry cooling due to low water level (corresponding to dry burning of the heating module 920). The control logic is also simpler.

[0033] For example, the outlet of the purified water tank 800 can be connected to the main outlet 20 via a hot water pipe 900. The water purifier may also include a heating module 920, which is connected in series on the hot water pipe 900. The heating module 920 may include, but is not limited to, existing or future heating elements such as thick-film heating elements, hot water tanks, and electromagnetic heaters. Thus, the water purifier can provide hot water to the user. The water purifier may also include a water pump 910, which can also be connected in series on the hot water pipe 900. Optionally, the water pump 910 can be located upstream of the heating module 920, so that it is not affected by the hot water from the heating module 920 during operation. The water pump 910 can pump water to a height above the liquid level in the purified water tank 800, effectively increasing the water flow rate and improving the user experience. Optionally, the water pump 910 can control the flow rate, enabling the water dispenser to provide the user with more accurate hot water temperature when the user expects a higher temperature, avoiding excessive water flow that results in insufficient heating and a lower outlet temperature.

[0034] For example, the water purifier may also include a pre-filter 120, which is connected in series in the raw water pipeline 200. The pre-filter 120 may include one of PP cotton, activated carbon, non-woven fabric, etc., or any two or more of them combined into a filter element. It is located before the central filter 110 and is used to perform preliminary filtration on the water entering the central filter 110 to extend the service life of the central filter 110.

[0035] Under pressure, purified water passes through the central filter element 110. The ratio of purified water to the remaining concentrated water that does not pass through the central filter element 110 is the wastewater ratio. The wastewater ratio can be limited by, for example, a wastewater ratio valve. Exemplarily, the water purifier also includes a wastewater ratio solenoid valve 630 connected in series on the first concentrated water line 610. The wastewater ratio solenoid valve 630 includes a valve core with a small orifice, which can function as a wastewater ratio valve. When the wastewater ratio solenoid valve 630 is closed, it maintains the pressure required for the central filter element 110 to operate and allows a certain flow rate of concentrated water to pass through it. When the wastewater ratio solenoid valve 630 is open, raw water can quickly pass through it from a path other than the wastewater ratio valve, thereby flushing the central filter element 110. The rapidly discharged raw water can also replace the concentrated water in the hot water tank 500 and flush the tank, thus replacing the concentrated water with cooler raw water when the water temperature in the tank is high. Optionally, the wastewater ratio solenoid valve 630 can be opened periodically to flush the hot water tank 500, preventing the concentrated water from accumulating for a long time and breeding bacteria, or causing a large amount of salt to accumulate and form scale in the tank due to heat and gravity. Connecting the wastewater ratio solenoid valve 630 in series with the first concentrated water pipe 610 ensures that the pipe downstream of the wastewater ratio solenoid valve 630 is not under pressure, thus eliminating the need for the hot water tank 500 to be constructed as a pressure-bearing structure. Of course, as... Figure 3 As shown, this application also does not exclude embodiments in which the wastewater ratio solenoid valve 630 is connected in series with the second concentrate pipeline 620, and the hot water tank 500 is able to withstand pressure.

[0036] When the wastewater ratio solenoid valve 630 is open, almost all of the raw water pumped by the booster pump 210 is discharged through the wastewater ratio solenoid valve 630. Therefore, it can be assumed that as long as the wastewater ratio solenoid valve 630 is open, the water output from the concentrate port 113 of the central filter element 110 is the raw water.

[0037] For example, the inlet 510 of the hot water tank 500 is located at its bottom, and the outlet 520 of the hot water tank 500 is located at its top. This ensures that the hot water tank 500 is completely filled after sufficient concentrated water enters, preventing the accumulation of air bubbles. Furthermore, the second concentrated water pipeline 620 does not require a valve for control. During water purification, the concentrated water discharged from the concentrated water outlet 113 can continuously enter the hot water tank 500, pushing out the higher-temperature concentrated water in the upper part of the hot water tank 500. This higher-temperature concentrated water can then be discharged through the drain outlet 30.

[0038] Exemplarily, the water purifier may further include a first temperature sensor 710 for detecting the water temperature within the cold water chamber 310. The first temperature sensor 710 may include any existing or future temperature sensor, such as a thermocouple, platinum resistance thermometer, semiconductor thermistor, or infrared temperature sensor, and may be installed inside or outside the cold water chamber 310 accordingly. The water purifier may also include a controller, with the first temperature sensor 710 electrically connected to the controller. The controller may control the cooling component to operate or stop operating based on the cold water temperature within the cold water chamber 310. Specifically, when the cold water temperature is higher than the desired water intake temperature, the controller may control the cooling component to operate, thereby ensuring that the cold water supplied to the user meets the desired water intake temperature as much as possible. When the cold water temperature is not higher than the desired water intake temperature, the controller may also control the cooling component to stop operating to reduce energy consumption.

[0039] The controller can be built using electronic components such as comparators, registers, and digital logic circuits, or implemented using processor chips such as microcontrollers, microprocessors, programmable logic controllers (PLCs), digital signal processors (DSPs), field-programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and application-specific integrated circuits (ASICs) and their peripheral circuits.

[0040] The wastewater ratio solenoid valve 630 can also be electrically connected to the controller. The controller is used to enter a water exchange mode when the rate of temperature decrease in the cold water chamber 310 is less than a preset threshold. In the water exchange mode, the controller controls the wastewater ratio solenoid valve 630 and the inlet solenoid valve 220 to open. As mentioned above, when the water temperature in the hot water tank 500 is too high and it is difficult to provide good heat dissipation, the working efficiency of the refrigeration components decreases, and the rate of temperature decrease in the cold water chamber 310 decreases. The preset threshold can be the rate of temperature decrease in the cold water chamber 310 when the temperature of the hot water tank 500 meets the requirements. Specifically, when the temperature of the hot water tank 500 remains constant, the lower the water temperature in the cold water chamber 310, the lower the rate of temperature decrease in the cold water chamber 310. Therefore, even under normal working conditions, the rate of temperature decrease in the cold water chamber 310 is not constant. Optionally, the preset threshold can be the minimum rate of temperature decrease under normal working conditions. Optionally, the preset threshold can have a functional relationship with the current water temperature in the cold water chamber 310; the lower the current water temperature in the cold water chamber 310, the smaller the preset threshold. In summary, the controller can determine whether the water temperature in the hot water tank 500 is too high and affecting the operation of the cooling components by setting a preset threshold, thereby entering the water exchange mode. After the inlet solenoid valve 220 and the wastewater ratio solenoid valve 630 are opened, raw water can enter the hot water tank 500 with relatively low resistance under the tap water pressure, replacing the concentrated water in the hot water tank 500 with raw water. Optionally, if the water purifier includes a booster pump 210, the booster pump 210 can also be turned on to further increase the flow rate of raw water. Optionally, the inlet solenoid valve 220 and the wastewater ratio valve can be opened for a short time, so that only part of the concentrated water in the hot water tank 500 is replaced with raw water, only lowering the temperature of the hot water tank 500. Optionally, the inlet solenoid valve 220 and the wastewater ratio valve can be opened for a longer time, completely replacing the concentrated water in the hot water tank 500 with raw water. Optionally, the raw water can also be used to flush the hot water tank 500.

[0041] Exemplarily, the water purifier may also include a second temperature sensor 720 for detecting the water temperature inside the hot water tank 500. The second temperature sensor 720 may also include any existing or future temperature sensor. The second temperature sensor 720 is electrically connected to the controller. The controller may also be used to enter a water exchange mode when the water temperature in the hot water tank 500 is higher than a preset temperature, and in the water exchange mode, control the opening of the wastewater ratio solenoid valve 630 and the inlet solenoid valve 220. The preset temperature can be determined experimentally. When the water temperature in the hot water tank 500 is higher than the preset temperature, it will affect the cooling efficiency of the cooling components, causing the user to wait longer. Therefore, when the water temperature in the hot water tank 500 is too high, the concentrated water in the hot water tank 500 can be partially discharged or completely replaced by the pressure of the tap water.

[0042] For example, the water purifier may also include a booster pump 210 connected in series with the raw water pipeline 200. As described above, the booster pump 210 ensures that the raw water pressure meets the working pressure of the central filter element 110, thereby efficiently producing purified water. The controller is also used to control the booster pump 210 to shut down in water exchange mode. Optionally, when the booster pump 210 is not working, it can generate a certain resistance to the water flow, thereby preventing a large amount of tap water from flowing out of the concentrate outlet rapidly, which is equivalent to a certain flow restriction effect. The raw water after flow restriction can meet the requirement of replacing the water in the hot water tank 500 with water at a lower temperature. When the wastewater ratio solenoid valve 630 is open, almost all the raw water that has not been boosted by the booster pump reaches the concentrate outlet 113 of the central filter element to exchange the water in the hot water tank 500. This can reduce the noise of the water purifier in water exchange mode and reduce energy consumption.

[0043] In the description of this utility model, it should be understood that the directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" indicate the orientation or positional relationship, which are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0044] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application 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 where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water purifier having a total water inlet, a total water outlet, and a drain, characterized by, The water purifier comprises: a central filter having a raw water inlet, a purified water outlet and a concentrated water outlet, the raw water inlet being connected to the total water inlet via a raw water pipeline, the purified water outlet being connected to the total water outlet; a cold water tank comprising a cold water cavity and a refrigeration assembly, a water inlet of the cold water cavity being connected to the purified water outlet via a make-up water pipeline, a water outlet of the cold water cavity being connected to the total water outlet via a cold water pipeline, the refrigeration assembly comprising a cold end and a hot end, wherein the cold end of the refrigeration assembly is in heat exchange with the cold water cavity; and a heat absorption water tank, a water inlet of the heat absorption water tank being connected to the concentrated water outlet via a first concentrated water pipeline, a water outlet of the heat absorption water tank being connected to the drain outlet via a second concentrated water pipeline, the hot end of the refrigeration assembly being in heat exchange with the heat absorption water tank.

2. The water purifier according to claim 1, characterized in that, The water purifier further comprises a waste water ratio solenoid valve arranged in series on the first concentrated water pipeline and / or the second concentrated water pipeline.

3. The water purifier according to claim 1, wherein The hot end of the refrigeration assembly comprises a heat dissipation fin, at least a portion of the heat dissipation fin extending into the heat absorption water tank.

4. The water purifier according to claim 1, wherein The water inlet of the heat absorption water tank is located at the bottom of the heat absorption water tank, and the water outlet of the heat absorption water tank is located at the top of the heat absorption water tank.

5. The water purifier according to claim 2, wherein The water purifier further comprises: a first temperature sensor for detecting the temperature of water in the cold water cavity; a water inlet solenoid valve arranged in series on the raw water pipeline; and a controller, the first temperature sensor and the waste water ratio solenoid valve being electrically connected to the controller, wherein: the controller is configured to enter a water replacement mode when the temperature reduction rate of water in the cold water cavity is less than a preset threshold, and in the water replacement mode, the controller controls the waste water ratio solenoid valve and the water inlet solenoid valve to be opened.

6. The water purifier according to claim 2, wherein The water purifier further comprises: a second temperature sensor for detecting the temperature of water in the heat absorption water tank; a water inlet solenoid valve arranged in series on the raw water pipeline; and a controller, the second temperature sensor and the waste water ratio solenoid valve being electrically connected to the controller, wherein: the controller is configured to enter a water replacement mode when the temperature of water in the heat absorption water tank is higher than a preset temperature, and in the water replacement mode, the controller controls the waste water ratio solenoid valve and the water inlet solenoid valve to be opened.

7. The water purifier according to claim 5 or 6, characterized in that The water purifier further comprises a booster pump arranged in series on the raw water pipeline; the controller is further configured to control the booster pump to be closed in the water replacement mode.

8. The water purifier according to claim 1, wherein The water purifier further comprises a purified water tank arranged in series on the make-up water pipeline, the purified water tank being higher than the cold water cavity.

9. The water purifier according to claim 8, characterized in that, The water purifier further comprises a water pump and a heating module, a water outlet of the purified water tank being connected to the total water outlet via a hot water pipeline, the water pump and the heating module being arranged in series on the hot water pipeline.

10. The water purifier according to claim 1, characterized in that, The water purifier further comprises a front filter arranged in series on the raw water pipeline.

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