Water purifying and drinking machine and water purifying and drinking machine control method

Abstract

The invention relates to a water purifying and drinking machine and a water purifying and drinking machine control method. Wherein the water purification module comprises a filter element, a water inlet pipeline and a concentrated water pipeline, the water inlet pipeline is provided with a flow regulating valve and a booster pump, and the concentrated water pipeline is provided with a normally open channel and an adjustable channel; according to the refrigeration module, a compressor, a condenser, a throttling valve and an evaporator form a circulation loop, the evaporator exchanges heat with pure water, and the condenser exchanges heat with concentrated water; the control module is connected with the flow regulating valve and the booster pump and controls and switches at least two heat exchange modes, and in the first heat exchange mode, the water inlet valve is opened, and the adjustable channel is closed; in the second heat exchange mode, the water inlet valve and the adjustable channel are opened, and the booster pump is closed; and the third heat exchange mode is fully opened, and the water flow of the three heat exchange modes is gradually reduced. The water purifying and drinking machine and the water purifying and drinking machine control method provided by the invention are high in refrigeration efficiency, strong in adaptability and capable of reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, and in particular to water purifiers and water purifier control methods. Background Technology

[0002] A water purifier is a device that integrates water purification and water supply functions. It filters tap water or other water sources through a built-in filter and provides direct drinking water at different temperatures. Water purifiers can directly filter tap water, making water quality controllable, improving the safety and convenience of drinking water, and meeting more diverse water needs.

[0003] Water purifiers typically produce cold water by lowering the water temperature through a built-in refrigeration module. For example, a built-in compressor uses refrigerant circulation to cool the water through an evaporator to obtain cold water.

[0004] In related technologies, the water circuit of the water purification module is used to exchange heat with the refrigerant in the condenser. However, there is a problem that the heat exchange capacity of the water circuit of the water purification module for the refrigerant does not match the heat exchange requirements of the condenser. Summary of the Invention

[0005] The first technical problem solved by this invention is to provide a water purifier that helps to precisely match the heat exchange capacity of the water purification module with the heat exchange requirements of the condenser.

[0006] The second technical problem solved by this invention is to provide a water purifier control method that can effectively meet the heat exchange requirements of the condenser.

[0007] The third technical problem solved by this invention is to provide a water purifier control method that can effectively meet the heat exchange requirements of the condenser.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A water purifier, comprising:

[0010] A water purification module includes a first filter element and an inlet pipe connected to the inlet of the first filter element. The first filter element is also provided with a pure water outlet and a concentrated water outlet. The concentrated water outlet is connected to a concentrated water pipe. The inlet pipe is provided with an inlet flow regulating valve and a booster pump. The concentrated water pipe is provided with a normally open channel and an adjustable channel.

[0011] The refrigeration module includes a compressor, a condenser, a throttling valve, and an evaporator connected in sequence to form a circulation loop; wherein the evaporator exchanges heat with the pure water flowing out of the pure water outlet, and the condenser exchanges heat with the concentrated water in the concentrated water pipeline;

[0012] A control module, electrically connected to the inlet flow regulating valve, the adjustable channel, and the booster pump, is used to control the water purifier to switch heat exchange modes. The heat exchange modes include at least two of a first heat exchange mode, a second heat exchange mode, and a third heat exchange mode. In the first heat exchange mode, the control module controls the inlet flow regulating valve to open and the adjustable channel to close. In the second heat exchange mode, the control module controls both the inlet flow regulating valve and the adjustable channel to open, and the booster pump to close. In the third heat exchange mode, the inlet flow regulating valve, the adjustable channel, and the booster pump are all open. The water flow rates of the first, second, and third heat exchange modes are ordered from largest to smallest as: third heat exchange mode, second heat exchange mode, first heat exchange mode.

[0013] The water purifier of the present invention offers the following advantages compared to the prior art: In the refrigeration module, the evaporator directly exchanges heat with pure water, ensuring efficient transfer of cooling capacity to the pure water. The condenser directly exchanges heat with the concentrated water in the concentrated water pipeline, utilizing the concentrated water as a heat dissipation medium in the refrigeration cycle. This improves the comprehensive utilization rate of water resources, achieves efficient heat dissipation, reduces the condensing temperature and pressure of the condenser, thereby improving the compressor's working efficiency, reducing the energy consumption of the refrigeration system, and further enhancing the cooling effect. Furthermore, by setting at least two of the first, second, and third heat exchange modes, the control module can dynamically match the water flow rate in the concentrated water pipeline with the heat exchange demand of the condenser by switching between different heat exchange modes. When the heat exchange demand is low, using the low-flow-rate heat exchange mode can reduce water consumption, avoiding energy waste from long-term full-load operation of the system and significantly improving energy efficiency. When the heat exchange demand is high, switching to the high-flow-rate heat exchange mode ensures that the water in the concentrated water pipeline quickly removes more condensing heat, preventing the condenser from overheating and causing a decrease in refrigeration efficiency.

[0014] In one embodiment,

[0015] It also includes a first pure water tank, which has a first pure water tank inlet and a first pure water tank outlet. The first pure water tank inlet and the pure water outlet are connected via a pure water pipeline. The evaporator is located inside the first pure water tank to cool the water in the first pure water tank. The first pure water tank outlet is used to provide cold water to the user; or

[0016] It also includes an ice-making chamber, which is provided with an ice-making chamber water inlet and an ice-making chamber ice outlet. The ice-making chamber water inlet is connected to the pure water outlet through a pure water pipeline. The evaporator is located inside the ice-making chamber to cool the water in the ice-making chamber to form ice cubes. The ice-making chamber ice outlet is used to provide ice cubes to users.

[0017] In one embodiment, a second pure water tank is also included. The second pure water tank is provided with a second pure water tank inlet and a second pure water tank outlet. The second pure water tank inlet is connected to the pure water outlet through a pure water pipeline. A portion of the condenser is disposed in the pure water tank. The second pure water tank outlet is used to discharge the water that has been heat-exchanged by the condenser.

[0018] In one embodiment, a heating module is also included, comprising an instant hot water pump and a heater connected in sequence, wherein the inlet of the instant hot water pump is connected to the outlet of the second pure water tank, and the outlet of the heater is used to provide hot water to the user.

[0019] In one embodiment, a concentrate flow regulating valve is provided on the concentrate pipeline, and the valve body of the concentrate flow regulating valve has a concentrate orifice and a main flow channel.

[0020] The valve core of the concentrate flow regulating valve is used to regulate the opening and closing of the main flow channel so that the main flow channel serves as the adjustable channel.

[0021] The concentrate orifice serves as the normally open channel, allowing concentrate to flow when the main channel is closed.

[0022] The second technical problem mentioned above is solved by the following technical solution:

[0023] A method for controlling a water purifier, used to control a water purifier as described in any of the above embodiments, comprising:

[0024] When the cooling function is activated, the current heat exchange requirement of the condenser is obtained, and a heat exchange mode that matches the water flow rate with the current heat exchange requirement is selected.

[0025] The water purifier control method of this invention offers the following advantages compared to prior art: It can select a heat exchange mode with an appropriate water flow rate based on the current heat exchange demand of the condenser. When the current heat exchange demand of the condenser is low, a mode with a smaller water flow rate is selected to maintain basic heat dissipation and avoid unnecessary energy consumption. When the current heat exchange demand of the condenser is high, the refrigerant temperature generated by the condenser is high, and a mode with a larger water flow rate is selected. This increases the water flow rate in the concentrated water pipe to enhance heat exchange with the condenser, quickly removing heat and preventing problems such as increased condensing pressure and decreased compressor efficiency due to insufficient heat dissipation. This ensures the refrigeration system always operates in a high-efficiency range, improving the overall energy efficiency ratio. The above water purifier control method can adapt to different scenarios' water volume and cooling speed requirements while reducing the system's total energy consumption.

[0026] The third technical problem mentioned above is solved by the following technical solution:

[0027] A method for controlling a water purifier, used to control a water purifier as described in any of the above embodiments, wherein the heat exchange mode includes at least a first heat exchange mode, and the method includes:

[0028] When both the water purification and cooling functions are activated, select the first heat exchange mode to operate.

[0029] When the water production function is not activated but the cooling function is activated, the current heat exchange demand of the condenser is obtained, and a heat exchange mode that matches the water flow rate with the current heat exchange demand is selected.

[0030] The beneficial effects of the water purifier control method described in this invention compared to the prior art are as follows:

[0031] When both water purification and cooling functions are activated simultaneously, the control method consistently selects the first heat exchange mode. This prioritizes ensuring the filtration efficiency of the filter cartridge and the stability of pure water production. In this mode, the adjustable channel is closed, and concentrated water is delivered only through the normally open channel, minimizing the water flow. This reduces interference from the concentrated water on the water inlet pressure of the purification module and utilizes the limited concentrated water to provide basic heat dissipation for the condenser. The low flow rate of concentrated water also reduces water waste during the water purification process. When only the cooling function is activated, the control method flexibly adjusts the flow rate by acquiring the current heat exchange requirements of the condenser. It can freely select the second or third heat exchange mode based on the cooling load, allowing the cooling system to operate independently and efficiently. This water purifier control method can adapt to different scenarios' water volume and cooling speed requirements while reducing overall system energy consumption.

[0032] In one embodiment, obtaining the current heat exchange demand of the condenser involves obtaining the current operating current of the compressor, which is used to characterize the current heat exchange demand of the condenser; if the current operating current is high, the current heat exchange demand is high; if the current operating current is low, the current heat exchange demand is low.

[0033] In one embodiment, the water purifier further includes a second pure water tank, which is provided with a second pure water tank inlet. The second pure water tank inlet and the pure water outlet are connected through a pure water pipeline. A portion of the condenser is disposed in the pure water tank.

[0034] The current heat exchange requirement of the condenser is obtained by obtaining the current water temperature of the second pure water tank. The current water temperature of the second pure water tank is used to characterize the current heat exchange requirement of the condenser. If the current water temperature is high, the current heat exchange requirement is high; if the current water temperature is low, the current heat exchange requirement is low.

[0035] In one embodiment, obtaining the current heat exchange requirement of the condenser involves obtaining the amount of cooling water carried in the user command. The amount of cooling water is used to characterize the current heat exchange requirement of the condenser. If the amount of cooling water is high, the current heat exchange requirement is high; if the amount of cooling water is low, the current heat exchange requirement is low. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the pipeline structure of a water purifier provided in an embodiment of the present invention.

[0038] To make the above and other objects, features, advantages and embodiments of the present invention more apparent and understandable, the appended symbols are explained as follows:

[0039] 11. First water outlet; 12. Second water outlet; 13. Third water outlet; 100. First pure water tank; 110. First pure water tank inlet; 120. First pure water tank outlet; 130. First liquid level sensor; 140. First temperature sensor; 200. Second pure water tank; 210. Second pure water tank inlet; 220. Second pure water tank outlet; 230. Second liquid level sensor; 240. Second temperature sensor; 310. Inlet pipe; 311. Pure water outlet; 312. Concentrate outlet; 320. Inlet flow regulating valve; 33. 0. Booster pump; 340. First filter element; 350. Concentrate pipeline; 360. Concentrate flow regulating valve; 370. Three-way valve; 380. Second filter element; 390. Pure water pipeline; 410. Compressor; 411. Compressor inlet; 412. Compressor outlet; 420. Heat exchanger; 421. Heat exchange coil; 430. Throttling valve; 440. Evaporator; 450. Dryer; 460. Cold water outlet pump; 510. Instant hot water pump; 520. Check valve; 530. Flow sensor; 540. Heater; 550. Third temperature sensor. Detailed Implementation

[0040] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] Figure 1 This is a schematic diagram of the piping structure of a water purifier according to an embodiment of the present invention. (See attached diagram.) Figure 1 An embodiment of the present invention provides a water purifier, comprising:

[0047] A water purification module includes a first filter element 340 and an inlet pipe 310 connected to the inlet of the first filter element 340. The first filter element 340 is also provided with a pure water outlet 311 and a concentrated water outlet 312. The concentrated water outlet 312 is connected to a concentrated water pipe 350. The inlet pipe 310 is provided with an inlet flow regulating valve 320 and a booster pump 330. The concentrated water pipe 350 is provided with a normally open channel and an adjustable channel.

[0048] The refrigeration module includes a compressor 410, a condenser, a throttle valve 430, and an evaporator 440 connected in sequence to form a circulation loop; wherein the evaporator 440 exchanges heat with the pure water flowing out of the pure water outlet 311, and the condenser exchanges heat with the concentrated water in the concentrated water pipeline 350.

[0049] A control module, electrically connected to the inlet flow regulating valve 320, the adjustable channel, and the booster pump 330, is used to control the water purifier to switch heat exchange modes. The heat exchange modes include at least two of a first heat exchange mode, a second heat exchange mode, and a third heat exchange mode. In the first heat exchange mode, the control module controls the inlet flow regulating valve 320 to open and the adjustable channel to close. In the second heat exchange mode, the control module controls both the inlet flow regulating valve 320 and the adjustable channel to open, and the booster pump 330 to close. In the third heat exchange mode, the inlet flow regulating valve 320, the adjustable channel, and the booster pump 330 are all open. The water flow rates of the first, second, and third heat exchange modes are ordered from largest to smallest as: third heat exchange mode, second heat exchange mode, first heat exchange mode.

[0050] The inlet water pipe 310 is used to input raw water into the water purification module. The water purification module purifies the raw water to obtain pure water through the first filter element 340. The first filter element 340 can be a reverse osmosis membrane (RO membrane) filter element. The raw water can be tap water or other water sources. Concentrated water refers to the by-product of the purification process. When the first filter element 340 is a reverse osmosis membrane filter element, most of the salts and organic matter are trapped when the raw water passes through the semi-permeable membrane, remaining in the non-permeable water, resulting in an increased impurity concentration in this part of the water, which becomes concentrated water. The inlet water flow regulating valve 320 is used to adjust the flow rate of raw water entering the water purification module. The heat exchanger 420 is connected to the pure water pipe 390 and the concentrated water pipe 350 for heat exchange. On the one hand, it can use the concentrated water and high-temperature and high-pressure refrigerant to preheat the pure water. On the other hand, the concentrated water and pure water also have a cooling effect on the refrigerant, which can reduce the temperature of the refrigerant entering the throttling valve 430 and improve the efficiency of the refrigeration module. The inlet flow regulating valve 320 is electrically connected to the control module. The control module can adjust the valve's on / off state or opening degree according to preset parameters, operating modes, or in response to input commands. This allows the control module to adjust parameters such as the flow rate and pressure of the raw water to control the heat exchanger 420's heat exchange effect, thus meeting different cooling requirements. A booster pump 330 is used to adjust the pressure of the raw water entering the water purification module. The control module can adjust the flow rate and pressure of the raw water by adjusting the speed and other operating parameters of the booster pump 330 to meet different heat exchange requirements. When the water purification function is not activated, due to water pressure, if the inlet pipe 310 is opened, tap water will flow directly out of the concentrated water outlet 312 after entering the water purification module. The pure water outlet 311 and the concentrated water outlet 312 are used to discharge the pure water and concentrated water produced by the first filter element 340, respectively. A normally open channel refers to a channel that remains open and is used to discharge concentrated water when the water production function is activated. An adjustable channel refers to a channel whose opening and / or flow rate can be adjusted. The total flow rate of the concentrated water pipeline 350 can be controlled through the adjustable channel. By adjusting the opening of the adjustable channel, the ratio and flow rate of concentrated water and raw water in the concentrated water pipeline 350 can be adjusted.The water purifier's heat exchange modes are used to prepare water or make ice at temperatures below a preset temperature. The first and second heat exchange modes correspond to the conventional heat exchange mode and the water-cooling mode, respectively. When the air and raw water temperatures are low, the heat exchanger 420 requires less heat. In this case, cooling the refrigerant in the heat exchanger 420 with pure water and a small amount of concentrated water is sufficient to meet the cooling demand. Therefore, the inlet flow regulating valve 320 is opened to allow the water purification module to normally produce pure water and raw water, while the concentrated water flows out from the normally open channel at a smaller flow rate. When the air and / or raw water temperatures are high, the conventional heat exchange mode cannot meet the rapid cooling demand, requiring an increase in the heat exchanger 420's heat exchange capacity and cooling capacity. In terms of heat exchange efficiency, the inlet water flow regulating valve 320 and the adjustable channel are opened to increase the raw water flow rate. At this time, the water flowing out through the concentrate flow regulating valve 360 ​​is a mixture of raw water and concentrate. Compared with the water flowing out through the concentrate orifice, the temperature is lower and the flow rate and velocity are also greater, thereby improving the heat exchange efficiency of the heat exchanger 420 and realizing the rapid preparation of cold water. When it is necessary to quickly prepare cold water or ice, the inlet water flow regulating valve 320, the adjustable channel and the booster pump 330 are all opened by switching to the third heat exchange mode. At this time, the flow rate and velocity of raw water, pure water and concentrate are increased, which can further promote the heat dissipation of the condenser and meet higher heat exchange requirements.

[0051] In the aforementioned water purifier, the evaporator 440 directly exchanges heat with pure water in the refrigeration module, ensuring efficient transfer of cooling capacity to the pure water. The condenser directly exchanges heat with the concentrated water in the concentrated water pipeline 350, using the concentrated water as a heat dissipation medium in the refrigeration cycle. This improves the comprehensive utilization rate of water resources, achieves efficient heat dissipation, reduces the condensing temperature and pressure of the condenser, thereby improving the working efficiency of the compressor 410, reducing the energy consumption of the refrigeration system, and further enhancing the cooling effect. Furthermore, by setting at least two of the first, second, and third heat exchange modes, the control module can dynamically match the water flow rate and inlet flow rate of the concentrated water pipeline with the heat exchange demand of the condenser by switching between different heat exchange modes. When the heat exchange demand is low, using the heat exchange mode with a small water flow rate can reduce water consumption, avoid energy waste from long-term full-load operation of the system, and significantly improve energy efficiency. When the heat exchange demand is high, switching to the heat exchange mode with a large water flow rate ensures that the water in the concentrated water pipeline quickly removes more condensation heat, preventing the condenser from overheating and causing a decrease in refrigeration efficiency.

[0052] In one embodiment, it further includes at least one pure water tank, which is connected to the water purification module via the pure water pipeline 390. The heat exchanger 420 includes a heat exchange coil 421, which is at least partially disposed in one of the pure water tanks. The second inlet of the heat exchanger 420 is connected to the concentrate outlet 312, and the second outlet of the heat exchanger 420 is connected to the concentrate pipeline 350. The pure water tank may include a first pure water tank 100 and a second pure water tank 200. The first pure water tank 100 and the second pure water tank 200 are used to output cold water and hot water, respectively. The first pure water tank 100 includes a first pure water tank inlet 110 and a first pure water outlet 311. The second pure water tank 200 includes a second pure water tank inlet 210 and a second pure water outlet 311. The first pure water tank inlet 110 and the second pure water tank inlet 210 are both connected to the pure water outlet 311 of the water purification module. The first pure water tank outlet 120 is connected to the first water outlet 11 of the water purifier, and the second pure water tank outlet 220 is connected to the second water outlet 12 of the water purifier. The pure water outlet 311 of the water purification module may include a first pure water outlet 311 and a second pure water outlet 311, which are respectively connected to the first pure water tank inlet 110 and the second pure water tank inlet 210. Alternatively, they can be connected to the first pure water tank inlet 110 and the second pure water tank inlet 210 via a three-way valve 370. When using the three-way valve 370, it has one inlet and two outlets. It can also be connected to the third outlet 13 of the water purifier via a pipe or valve. The connection or disconnection of the passage between the water purification module and the first pure water tank 100 or the second pure water tank 200 can be controlled by opening and closing the outlets. Placing part or all of the heat exchange coil 421 inside one of the pure water tanks can increase the heat exchange area between the heat exchange coil 421 and the pure water, thereby improving heat exchange efficiency.

[0053] In one exemplary embodiment, the system further includes a first pure water tank 100, which has a first pure water tank inlet and a first pure water tank outlet 120. The first pure water tank inlet is connected to the pure water outlet 311 via a pure water pipeline 390. The evaporator 440 is located inside the first pure water tank 100 to cool the water in the first pure water tank 100. The first pure water tank outlet 120 is used to provide cold water to the user. Alternatively, the system further includes an ice-making chamber, which has an ice-making chamber inlet and an ice-making chamber outlet. The ice-making chamber inlet is connected to the pure water outlet 311 via a pure water pipeline 390. The evaporator 440 is located inside the ice-making chamber to cool the water in the ice-making chamber to form ice cubes. The ice-making chamber outlet is used to provide ice cubes to the user. The evaporator 440 directly cools the water in the pure water tank, allowing users to obtain pre-set cold water without waiting for the cooling process. This is especially suitable for peak water usage scenarios, enhancing convenience. The evaporator 440 also makes and stores ice, providing on-demand ice for cooling drinks. Because ice has a higher cold storage density than cold water, it can meet more intensive cooling needs. The evaporator 440, placed in the water tank or ice-making chamber, ensures a more uniform temperature throughout the tank of water or ice through continuous heat exchange, preventing localized temperature fluctuations and ensuring stable outlet water temperature.

[0054] In an exemplary embodiment, a second pure water tank is further included. The second pure water tank is provided with a second pure water tank inlet 210 and a second pure water tank outlet 220. The second pure water tank inlet 210 is connected to the pure water outlet 311 through a pure water pipeline 390. A portion of the condenser is disposed in the pure water tank, and the second pure water tank outlet 220 is used to discharge the water after heat exchange by the condenser. By placing the condenser portion in the second pure water tank, the pure water is preheated using the heat of condensation. The heated pure water can be directly output as warm water, reducing subsequent heating energy consumption. It can also reduce the heat dissipation load of the refrigeration system and improve the efficiency of the compressor 410. While the evaporator 440 produces cold water, the condenser simultaneously heats the water in the second pure water tank. The heating and cooling functions complement each other, maximizing energy utilization and effectively reducing energy consumption.

[0055] In one exemplary embodiment, a heating module is also included, comprising an instant hot water pump 510 and a heater 540 connected in sequence. The inlet of the instant hot water pump 510 is connected to the outlet 220 of the second pure water tank, and the outlet of the heater 540 is used to provide hot water to the user. The instant hot water pump 510 can draw preheated water from the second pure water tank and rapidly heat it to the boiling point via the heater 540, eliminating the need to wait for the entire tank to heat up, significantly increasing the speed of hot water production, reducing waiting time, and improving ease of use.

[0056] In an exemplary embodiment, the heating module includes an instant hot water pump 510, a check valve 520, a flow sensor 530, and a heater 540 connected in sequence. The inlet of the instant hot water pump 510 is connected to the pure water outlet 311. The heating module is connected to the outlet of the second pure water tank 200 and can heat the pure water flowing out of the second pure water tank 200 to prepare hot water. By controlling the rotation speed of the instant hot water pump 510, the residence time of the water flow in the heater 540 can be controlled, thereby controlling the heating efficiency. Since the pressure at the outlet of the pump is higher than the pressure inside the pure water tank, the check valve 520 prevents the heated water from flowing back into the pure water tank. A third temperature sensor 550 can also be installed downstream of the heater 540 to collect the outlet temperature of the hot water.

[0057] In an exemplary embodiment, a concentrate flow regulating valve 360 ​​is provided on the concentrate pipeline 350. The valve body of the concentrate flow regulating valve 360 ​​has a concentrate orifice and a main flow channel. The valve core of the concentrate flow regulating valve 360 ​​is used to regulate the opening and closing of the main flow channel so that the main flow channel becomes the adjustable channel. The concentrate orifice serves as the normally open channel, allowing concentrate to flow when the main flow channel is closed. The normally open concentrate orifice always allows a small amount of concentrate to pass through, ensuring a continuous water flow to flush the RO membrane surface, preventing salt deposition and membrane scaling. Even in low-flow mode, it can maintain a minimum concentrate flow rate, ensuring the normal operating environment of the membrane. The adjustable channel, as the main flow channel, dynamically opens according to the water purification demand. In high-flow mode, it increases concentrate discharge, reducing the osmotic pressure on both sides of the RO membrane and improving water production efficiency. In some embodiments, the concentrate flow regulating valve 360 ​​can be a CNKB Kobo concentrate solenoid valve, model FPD-360M32ZD.

[0058] In one exemplary embodiment, a dryer 450 is provided between the outlet of the evaporator 440 and the inlet 411 of the compressor. By providing the dryer 450, moisture and impurities in the refrigerant can be removed, ensuring stable operation of the refrigeration system and guaranteeing refrigeration efficiency.

[0059] In an exemplary embodiment, a second filter element 380 is disposed upstream of the inlet flow regulating valve 320, and a scale inhibitor is disposed inside the second filter element 380. The second filter element 380 can be a pretreatment filter element, such as a PP cotton filter element, a granular activated carbon filter element, or a compressed activated carbon filter element. The scale inhibitor can be disposed in the second filter element 380 by means of a built-in slow-release scale inhibitor module or a composite filter element structure. The scale inhibitor can be a food-grade scale inhibitor such as an acrylic copolymer. By adding a scale inhibitor to the second filter element 380, scale formation can be inhibited, and the service life of the first filter element 340 can be extended.

[0060] In an exemplary embodiment, level sensors are installed in the first pure water tank 100 and the second pure water tank 200, and the level sensors are electrically connected to the control module. The level sensors may include a first level sensor 130 installed in the first pure water tank 100 and a second level sensor 230 installed in the second pure water tank 200. The level sensors are used to monitor the water level and feed back signals to the control module to achieve functions such as automatic water replenishment and overflow prevention. Float-type, photoelectric, capacitive, or pressure-type level sensors can be selected according to actual needs.

[0061] In an exemplary embodiment, a first temperature sensor 140 and a second temperature sensor 240 for collecting the internal water temperature are respectively provided in the first pure water tank 100 and the second pure water tank 200.

[0062] In one exemplary embodiment, a water purifier is provided, the overall structure of which consists of three parts: a water purification module, a refrigeration module and a heating module. The heat exchanger 420 module in the water purification module and the refrigeration module are associated, and the heat exchanger 420 module is water-cooled by the purified water path to increase the refrigeration efficiency.

[0063] The water purification module consists of a pretreatment filter element, an inlet solenoid valve (valve 1), a booster pump 330, a reverse osmosis filter element, a pure water dual-outlet solenoid valve (valve 3), a concentrated water solenoid valve (valve 2), and a pressure switch.

[0064] The refrigeration module comprises a compressor 410, a hot water exchange tank module, a chilled water tank module, a throttle valve 430, a dryer 450, and a chilled water outlet pump 460. The hot water exchange tank module further includes a hot water exchange tank, a coil heat exchanger 420, a pure water temperature sensor, and a hot water exchange tank level sensor. Part of the coil heat exchanger 420's coil is located inside the hot water exchange tank, while another part is outside the tank, in close contact with the concentrated water flow from the purified water module for water-cooled heat exchange. The chilled water tank module comprises a chilled water tank, a chilled water temperature sensor, a chilled water evaporator 440, and a chilled water tank level float.

[0065] The instant heating module consists of an instant water pump 510, a check valve 520, a flow sensor 530, a heater 540, and a water outlet. When the cooling module is running, the heat from the heat exchanger 420 can preheat the pure water in the hot water tank to a certain extent, which increases the hot water flow rate.

[0066] Tap water first undergoes initial filtration through a pretreatment filter cartridge, then passes through an inlet solenoid valve. After passing through the inlet valve, it enters a booster pump 330 to pressurize the water flow. After pressurization, it passes through a reverse osmosis filter cartridge. At this point, some water molecules pass through the reverse osmosis membrane, becoming filtered pure water, while the remaining water and impurities that cannot pass through the membrane are discharged from the concentrate end. The concentrate outlet is connected to the water circuit of heat exchanger 420 for water cooling and heat exchange before being discharged. After the pure water from the reverse osmosis filter cartridge, it passes through a one-inlet, two-outlet solenoid valve to input pure water into a heat exchange pure water tank and a cooling pure water tank, respectively. The water in the cooling pure water tank can be refrigerated to output ice water or made into ice through an ice-making structure. The water in the heat exchange pure water tank can be processed into hot water through an instant heating module. A room temperature pure water outlet can also be added after the filter cartridge outlet, with the water circuit controlled by a pressure switch.

[0067] The concentrate solenoid valve for water purifiers is a specialized solenoid valve for reverse osmosis water purification equipment, combining a concentrate proportioner and a flushing solenoid valve in the water purification circuit. It adds a concentrate orifice to a conventional solenoid valve, allowing a certain amount of water to pass through even when the valve body is closed, achieving the effect of a concentrate proportioner. When open, it functions as a flushing valve, allowing tap water to flow quickly through the membrane. Furthermore, the amount of water passing through the concentrate orifice is related to the overall reverse osmosis membrane flux; theoretically, the higher the flux of the reverse osmosis membrane, the greater the concentrate flow rate. Therefore, the orifice diameter of the concentrate solenoid valve is not fixed and must be selected based on the membrane flux.

[0068] In one exemplary embodiment, a water purifier control method is provided for controlling a water purifier as described in any of the above embodiments, comprising:

[0069] When the cooling function is activated, the current heat exchange requirement of the condenser is obtained, and a heat exchange mode that matches the water flow rate with the current heat exchange requirement is selected.

[0070] The heat exchange demand of the condenser can be quantified by calculating the condensing load. Using the above method, a heat exchange mode with an appropriate water flow rate can be selected based on the current heat exchange demand of the condenser. When the current heat exchange demand of the condenser is low, a mode with a lower water flow rate is selected to maintain basic heat dissipation and avoid unnecessary energy consumption. When the current heat exchange demand of the condenser is high, the refrigerant temperature produced by the condenser is high, and a mode with a higher water flow rate is selected. This increases the water flow rate in the concentrate pipe to enhance heat exchange with the condenser, quickly removing heat and preventing problems such as increased condensing pressure and decreased compressor efficiency due to insufficient heat dissipation. This ensures the refrigeration system always operates in a high-efficiency range, improving the overall energy efficiency ratio. The above water purifier control method can adapt to different scenarios' water volume and cooling speed requirements while reducing the system's total energy consumption.

[0071] In one exemplary embodiment, a water purifier control method is provided for controlling a water purifier as described in any of the above embodiments, wherein the heat exchange mode includes at least a first heat exchange mode, and the method includes:

[0072] When both the water purification and cooling functions are activated, select the first heat exchange mode to operate.

[0073] When the water production function is not activated but the cooling function is activated, the current heat exchange demand of the condenser is obtained, and a heat exchange mode that matches the water flow rate with the current heat exchange demand is selected.

[0074] The above water purifier control method, when both water purification and cooling functions are activated simultaneously, consistently selects the first heat exchange mode. This prioritizes ensuring the filtration efficiency of the filter cartridge and the stability of pure water production. In this mode, the adjustable channel is closed, and concentrated water is delivered only through the normally open channel, minimizing the water flow. This reduces interference from the concentrated water on the water inlet pressure of the purification module and provides basic heat dissipation for the condenser. The low flow rate also reduces water waste during the water purification process. When only the cooling function is activated, the control method flexibly adjusts the flow rate by acquiring the current heat exchange demand of the condenser. It can freely select the second or third heat exchange mode based on the cooling load, allowing the cooling system to operate independently and efficiently. This water purifier control method can adapt to different water volume and cooling speed requirements while reducing overall system energy consumption.

[0075] In an exemplary embodiment, obtaining the current heat exchange demand of the condenser involves obtaining the current operating current of the compressor 410. The current operating current of the compressor 410 is used to characterize the current heat exchange demand of the condenser; if the current operating current is high, the current heat exchange demand is high; if the current operating current is low, the current heat exchange demand is low. The operating current of the compressor 410 directly reflects its motor power consumption. When the heat exchange demand of the condenser increases, the current of the compressor 410 increases synchronously. By collecting the operating current of the compressor 410, the heat exchange demand of the condenser can be obtained intuitively and reliably, thereby facilitating rapid adjustment of the heat exchange mode to adapt to the heat exchange demand and reducing energy consumption.

[0076] In an exemplary embodiment, the water purifier further includes a second pure water tank, which has a second pure water tank inlet 210. The second pure water tank inlet 210 is connected to the pure water outlet 311 via a pure water pipeline 390. A portion of the condenser is disposed in the pure water tank. Obtaining the current heat exchange demand of the condenser involves obtaining the current water temperature of the second pure water tank. The current water temperature of the second pure water tank is used to characterize the current heat exchange demand of the condenser. If the current water temperature is high, the current heat exchange demand is high; if the current water temperature is low, the current heat exchange demand is low. When the condenser's heat exchange demand is high, it releases more heat to the second pure water tank, causing the water temperature to rise. When the heat exchange demand is low, the released heat decreases, and the water temperature decreases. By measuring the water temperature of the second pure water tank to determine the heat exchange demand, the heat exchange demand can be more closely approximated to the actual heat exchange effect. Furthermore, the water temperature change is gradual and predictable, and as a control signal, it can reduce system false triggering and improve reliability.

[0077] In one exemplary embodiment, obtaining the current heat exchange demand of the condenser involves obtaining the amount of cooling water carried in the user command. The amount of cooling water is used to characterize the current heat exchange demand of the condenser; if the amount of cooling water is high, the current heat exchange demand is high; if the amount of cooling water is low, the current heat exchange demand is low. By characterizing the heat exchange demand through the amount of cooling water, the required heat exchange intensity can be accurately calculated based on the amount of cooling water, avoiding over-cooling and thus reducing energy consumption.

[0078] In an exemplary embodiment, the method further includes: acquiring a first liquid level in the first pure water tank 100 or a second liquid level in the second pure water tank 200; outputting a fault warning signal when the first liquid level or the second liquid level is lower than or equal to a preset protection liquid level threshold; outputting a water shortage warning signal, starting the water purification module, and opening the valve between the water purification module and the first pure water tank 100 or the second pure water tank 200 when the first liquid level or the second liquid level is equal to or higher than a preset full water threshold; and closing the water purification module and the valve between the water purification module and the first pure water tank 100 or the second pure water tank 200 when the first liquid level or the second liquid level is equal to or higher than a preset full water threshold. Controlling the operation of the water purification module based on the liquid level of the pure water tank can avoid damage to components such as the RO membrane filter and water pump in the event of a water shortage, and avoid waste or equipment damage caused by overflow. It can also reduce the ineffective operating time of the water purification module and reduce energy consumption.

[0079] In one exemplary embodiment, a water purifier control method is provided, comprising:

[0080] In response to the first heat exchange mode switching command, the first internal temperature of the first pure water tank 100 is obtained, and when the first internal temperature is greater than the preset cooling start temperature threshold, the cooling module is started.

[0081] The second internal temperature of the second pure water tank and / or the operating current of the compressor 410 are obtained. When the second internal temperature is higher than the first temperature threshold and / or the operating current is greater than the preset first current threshold, a first control signal is generated.

[0082] In response to the first control signal, the inlet flow regulating valve 320 is opened;

[0083] In response to a second heat exchange mode switching command, or when the first internal temperature is higher than a second temperature threshold and / or the operating current is greater than a preset second current threshold, a second control signal is generated.

[0084] In response to the second control signal, the inlet flow regulating valve 320 and the concentrate flow regulating valve 360 ​​are opened;

[0085] In response to a third heat exchange mode switching command, a third control signal is generated; wherein, the third heat exchange mode switching signal includes an ice-making command or a rapid cooling command;

[0086] In response to the third control signal, the inlet flow regulating valve 320, the concentrate flow regulating valve 360, and the booster pump 330 installed on the inlet pipeline 310 are turned on.

[0087] The above-mentioned water purifier control method can control the start and stop of the refrigeration module, the opening and closing of the inlet water flow regulating valve 320 and the concentrate flow regulating valve 360, and the booster pump 330 according to the user's input instructions or preset conditions. By controlling the inlet water flow, inlet water pressure and concentrate flow, the cooling effect of the heat exchanger 420 can be controlled, thereby adjusting the cooling effect of the water purifier according to actual needs or load conditions, improving cooling efficiency and reducing the overall energy consumption of the water purifier.

[0088] In scenarios requiring ice making or rapid cooling, such as concentrated ice use in summer, the load on the refrigeration module increases further. By turning on the booster pump 330, the system pressure can be increased, the flow rate of pure water and concentrated water can be accelerated, and the heat exchange efficiency of the heat exchanger 420 can be improved. Combined with the efficient operation of the compressor 410, the water temperature in the pure water tank can be reduced in a short time to meet the user's need for immediate access to ice water.

[0089] In one exemplary embodiment, a water purifier control method is provided for controlling a water purifier as described in any of the above embodiments, comprising:

[0090] Cooling control method: The cooling module is switched on and off via a temperature sensor inside the cooling water tank. The cooling and start-up temperatures are set within the program. When the temperature sensor detects that the cooling temperature has been reached, the cooling function is turned off; when the temperature sensor detects that the temperature is higher than the start-up temperature, the cooling function is turned on. Additionally, the following three cooling and heat exchange modes are available to meet cooling needs in various environments:

[0091] Normal heat exchange mode: When the cooling function is turned on, the heat exchanger 420 is first heated by pure water from the hot water tank. The temperature sensor of the hot water tank monitors the water temperature in the tank in real time. When the water temperature in the temperature-controlled heat exchanger exceeds 45℃ or when the compressor 410 current is detected to be too high, the water inlet valve (valve 1) of the purified water module is opened to cool the heat exchanger 420 with a small flow of water (the concentrated water solenoid valve (valve 2) is a small-hole solenoid valve, and a small flow of water can pass through even when it is closed, see appendix for details) to ensure the cooling effect.

[0092] Water-cooled heat exchange mode: In areas with high temperatures, the conventional heat exchange mode may not meet the user's need for rapid cooling. In this case, the water-cooled heat exchange mode can be switched on. Simultaneously, the inlet solenoid valve (valve 1) and the concentrate solenoid valve (valve 2) of the water purification module are opened to allow a large flow of tap water to perform water-cooled heat exchange on the heat exchanger 420. The switching condition is that the water temperature in the hot water tank reaches 55℃ or the compressor 410 current is continuously detected to be too high. The water-cooled heat exchange mode can also be manually switched on, which can quickly produce low-temperature chilled water.

[0093] High-power water-cooled heat exchange mode: When users have a strong cooling demand, such as needing to make ice or produce cold water more quickly, the water purification module opens the inlet valve (valve 1) and the concentrate valve (valve 2), while the booster pump 330 participates in the cooling work, increasing the water flow rate and enabling the heat exchanger 420 to complete heat exchange more quickly. This mode can only be activated when making ice or when the user manually switches it.

[0094] Water replenishment and dispensing control methods: Liquid level sensors are installed in both the hot water tank and the cooling water tank. These sensors have three levels: low, high, and protection. The priority is set according to the program: 1. If the protection level signal is detected, the water production function is shut off and a float malfunction is indicated; 2. If the float does not detect a signal for 5 consecutive seconds at the high level, the water production function is activated until a high level signal is detected, at which point water production stops; 3. If a low level signal is detected, a water shortage is indicated and no water can be dispensed, while the water production function is activated. Once the water production function is activated, the solenoid valve corresponding to the water tank direction will open and begin producing water.

[0095] The relationship between the water production mode and the heat exchange mode is as follows:

[0096] When the water production function is turned on, the cooling and heat exchange methods cannot be switched, and only the regular heat exchange mode can be used. If the water cooling or high-power water cooling mode is manually set in advance, the mode will be switched after the water is replenished.

[0097] When using the powerful water cooling and water cooling mode for cooling, if the water level in the cold water tank is not detected as low, the cooling task will be completed first before water is added. If a low water level is detected, the system will switch to the normal mode to add water before switching back to the previously set mode.

[0098] Heat exchanger 420 can preheat the pure water in the pure water tank, increasing the outlet water flow of the instant heating module.

[0099] Pretreatment filter cartridges can be equipped with scale inhibitors to prevent scale buildup after the water-cooled water flows through the heat exchange coil 421, which could lead to blockage of the heat exchange coil 421 and affect the equipment's cooling performance.

[0100] The filter cartridge flushing mode can flush the coil at the same time, reducing the risk of coil clogging.

[0101] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A water purifier, characterized in that, include: The water purification module includes a first filter element (340) and an inlet pipe (310) connected to the inlet of the first filter element (340). The first filter element (340) is also provided with a pure water outlet (311) and a concentrated water outlet (312). The concentrated water outlet (312) is connected to a concentrated water pipe (350). The inlet pipe (310) is provided with an inlet flow regulating valve (320) and a booster pump (330). The concentrated water pipe (350) is provided with a normally open channel and an adjustable channel. The refrigeration module includes a compressor (410), a condenser (420), a throttle valve (430), and an evaporator (440) connected in sequence to form a circulation loop; wherein the evaporator (440) exchanges heat with the pure water flowing out of the pure water outlet (311), and the condenser (420) exchanges heat with the concentrated water in the concentrated water pipeline (350); A control module is electrically connected to the inlet flow regulating valve (320), the adjustable channel, and the booster pump (330), and is used to control the water purifier to switch heat exchange modes; wherein the heat exchange modes include at least two of a first heat exchange mode, a second heat exchange mode, and a third heat exchange mode; in the first heat exchange mode, the control module controls the inlet flow regulating valve (320) to open and the adjustable channel to close; in the second heat exchange mode, the control module controls both the inlet flow regulating valve (320) and the adjustable channel to open and the booster pump (330) to close; in the third heat exchange mode, the inlet flow regulating valve (320), the adjustable channel, and the booster pump (330) are all open; wherein the water flow rates of the first heat exchange mode, the second heat exchange mode, and the third heat exchange mode are ordered from largest to smallest as the third heat exchange mode, the second heat exchange mode, and the first heat exchange mode.

2. The water purifier according to claim 1, characterized in that, It also includes a first pure water tank (100), which has a first pure water tank inlet (110) and a first pure water tank outlet (120). The first pure water tank inlet (110) is connected to the pure water outlet (311) through a pure water pipeline (390). The evaporator (440) is located inside the first pure water tank (100) to cool the water in the first pure water tank (100). The first pure water tank outlet (120) is used to provide cold water to the user; or It also includes an ice-making chamber, which is provided with an ice-making chamber water inlet and an ice-making chamber ice outlet. The ice-making chamber water inlet is connected to the pure water outlet (311) through a pure water pipeline (390). The evaporator (440) is located inside the ice-making chamber to cool the water in the ice-making chamber to form ice cubes. The ice-making chamber ice outlet is used to provide ice cubes to users.

3. The water purifier according to claim 2, characterized in that, It also includes a second pure water tank (200), which is provided with a second pure water tank inlet (210) and a second pure water tank outlet (220). The second pure water tank inlet (210) is connected to the pure water outlet (311) through a pure water pipeline (390). A portion of the condenser (420) is disposed in the pure water tank. The second pure water tank outlet (220) is used to discharge the water that has been heat-exchanged by the condenser (420).

4. The water purifier according to claim 3, characterized in that, It also includes a heating module, which includes an instant hot water pump (510) and a heater (540) connected in sequence. The inlet of the instant hot water pump (510) is connected to the outlet (220) of the second pure water tank, and the outlet of the heater (540) is used to provide hot water to the user.

5. The water purifier according to claim 1, characterized in that, The concentrate pipeline (350) is equipped with a concentrate flow regulating valve (360), and the valve body of the concentrate flow regulating valve (360) has a concentrate hole and a main flow channel. The valve core of the concentrate flow regulating valve (360) is used to regulate the opening and closing of the main flow channel so that the main flow channel serves as the adjustable channel. The concentrate orifice serves as the normally open channel, allowing concentrate to flow when the main channel is closed.

6. A method for controlling a water purifier, characterized in that, The method for controlling the water purifier as described in claim 1 includes: When the cooling function is started, the current heat exchange demand of the condenser (420) is obtained, and a heat exchange mode that matches the water flow rate with the current heat exchange demand is selected.

7. A method for controlling a water purifier, characterized in that, For controlling the water purifier as described in claim 1, wherein the heat exchange mode includes at least a first heat exchange mode, the method includes: When both the water purification and cooling functions are activated, select the first heat exchange mode to operate. When the water production function is not activated and the cooling function is activated, the current heat exchange demand of the condenser (420) is obtained, and a heat exchange mode that matches the water flow rate with the current heat exchange demand is selected.

8. The water purifier control method according to claim 6 or 7, characterized in that, The current heat exchange requirement of the condenser (420) is obtained by obtaining the current operating current of the compressor (410), and the current operating current of the compressor (410) is used to characterize the current heat exchange requirement of the condenser (420); if the current operating current is high, then the current heat exchange requirement is high. If the current operating current is low, then the current heat exchange demand is low.

9. The water purifier control method according to claim 6 or 7, characterized in that, The water purifier also includes a second pure water tank (200), which is provided with a second pure water tank inlet (210). The second pure water tank inlet (210) is connected to the pure water outlet (311) through a pure water pipeline (390). A portion of the condenser (420) is disposed in the pure water tank. The current heat exchange requirement of the condenser (420) is obtained by obtaining the current water temperature of the second pure water tank (200), and the current water temperature of the second pure water tank (200) is used to characterize the current heat exchange requirement of the condenser (420). If the current water temperature is high, then the current heat exchange demand is high; if the current water temperature is low, then the current heat exchange demand is low.

10. The water purifier control method according to claim 6 or 7, characterized in that, The current heat exchange requirement of the condenser (420) is obtained by obtaining the amount of cooling water carried in the user command. The amount of cooling water is used to characterize the current heat exchange requirement of the condenser (420). If the amount of cooling water is large, the current heat exchange requirement is high. If the amount of cooling water is low, then the current heat exchange demand is low.

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