Water purifier temperature control method and device

Abstract

The invention discloses a water purifier temperature control method and device, and solves the problems of complex structure and long refrigeration time in ice making of existing water purification equipment, low heat dissipation efficiency due to adoption of a semiconductor refrigeration sheet, and bacterium breeding due to need of water storage in an ice container, and the problems of low heat dissipation efficiency, slow cooling speed, low energy consumption and the like due to the fact that difference of multiple temperatures is not considered in temperature control. And the energy consumption is high. The method comprises: acquiring a target temperature, and setting a working mode according to the target temperature; in the water outlet stage, the temperature of the purified water cooling plate is collected in real time, and the purified water flow when the purified water outlet temperature reaches the target temperature in the full-power working state of the refrigeration module is calculated; and controlling water discharge according to the purified water flow obtained by calculation. The real-time output of ice water of the water purifier is realized, the water purifier can discharge water at different temperatures through a temperature control method, an ice liner structure is not needed for water storage, the occupied space of the ice liner is reduced, and bacterium breeding is avoided. Different working modes are set according to the target temperature, and multi-temperature temperature control and energy saving are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purifiers, and in particular to a temperature control method and device for a water purifier. Background Art

[0002] At present, most of the household and commercial water purification equipment outputs hot water, and there are few devices that directly output ice water. The cooling methods of water purification equipment include compressor cooling water and semiconductor cooling water. Among them, the cooling efficiency of compressor cooling water is higher than that of semiconductor cooling water. Under the same power consumption, the cooling capacity of the compressor is 2~3 times that of the semiconductor cooling method. Therefore, compressor cooling is generally used in semi-direct drinking machines, but its first cooling water time also takes 20-30 minutes, and it does not realize the real direct drinking function; the semiconductor cooling method has a simple structure and high reliability, but the cooling capacity is less than the compressor cooling under the same power consumption, so it is generally necessary to use ice tanks to store cold water. Users drink stored ice water, which may cause problems such as bacterial growth. In addition, the cooling process of water purification equipment generally does not take into account the difference in cooling target temperature. The same cooling working process is used, and the cooling and heat dissipation control is not reasonably set. There are problems such as low heat dissipation efficiency, insufficient cooling capacity, slow cooling speed, and high energy consumption. Summary of the invention

[0003] The present invention mainly solves the problems that the existing water purification equipment has complex ice-making structure, long refrigeration time, low heat dissipation efficiency when using semiconductor refrigeration plates, bacteria breeding when storing water in ice tanks, and temperature control does not take into account the difference in multiple temperatures, resulting in low heat dissipation efficiency, slow cooling speed and high energy consumption. A water purifier temperature control method and device are provided.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions: A water purifier temperature control method, characterized in that: Get the target temperature and set the working mode according to the target temperature; During the water outlet stage, the temperature of the purified water cooling plate is collected in real time, and the purified water flow rate is calculated when the purified water outlet temperature reaches the target temperature when the refrigeration module is working at full power; The water outlet is controlled according to the calculated clean water flow rate.

[0005] The present invention realizes the real-time output of ice water for household and commercial water purifiers, and realizes the water purifier to output water at different temperatures through the temperature control method, without the need for a compressor refrigeration system, solving the problem of long first refrigeration time of compressors and semiconductor air-cooled types, and accurately controls the outlet temperature of the purified water to reach the target temperature through the calculation of the purified water flow rate, and adjusts the purified water temperature by real-time temperature control, so as to achieve the purpose of drinking ice water at any time. The present invention does not require an ice tank structure for water storage, reduces the space occupied by the ice tank and avoids bacterial growth. Different working modes are set according to the target temperature, realizing multi-temperature control and energy saving.

[0006] As a preferred solution, the purified water outlet temperature is set to three ranges, and the range in which the target temperature is located is determined, and different working modes are used for each range.

[0007] This solution divides the outlet temperature of purified water into three temperature ranges, and performs different working modes according to the temperature range of the target temperature. As a preferred solution, the three temperature ranges are set as the first temperature range, [12, 20) °C, the second temperature range, [8, 12) °C, and the third temperature range, less than 8 °C. The temperature ranges mentioned above are only preferred solutions and are not limited to the above temperature ranges. The different working modes are as follows: the first working mode, in the water outlet stage of the water purifier, the refrigeration module works, and only the wastewater needs to flow through the wastewater water cooling plate for heat dissipation, and the cooling fan does not need to be started. The second working mode, in the water outlet stage of the water purifier, the refrigeration module works, the wastewater flows through the wastewater water cooling plate for heat dissipation, and the cooling fan is started to dissipate heat together. The third working mode, in the non-outlet stage, pre-temperature adjustment is performed, and the water outlet stage is entered to keep the refrigeration module working, so as to cool the purified water to the target temperature faster, the wastewater flows through the wastewater water cooling plate for heat dissipation, and the cooling fan is controlled to work together for heat dissipation. The present invention selects and controls the heat dissipation and pre-temperature adjustment of the heat dissipation fan according to the target temperature in different temperature ranges, thereby achieving good heat dissipation and temperature reduction and reducing energy consumption.

[0008] As a preferred solution, three ranges are set in order from high to low according to the temperature. When the target temperature is in the first temperature range, the cooling module starts to work in the water outlet stage, and the wastewater flows through the wastewater cooling plate for heat dissipation; When the target temperature is in the second temperature range, the cooling module starts to work in the water outlet stage, and the wastewater flows through the wastewater cooling plate and controls the cooling fan to work together to dissipate heat; When the target is in the third temperature range, pre-temperature adjustment is performed in the non-water outlet stage, and the water outlet stage is entered to keep the refrigeration module working. The wastewater flows through the wastewater cooling plate and controls the cooling fan to work together for heat dissipation.

[0009] This solution divides the temperature into three temperature ranges from high to low, for example, the first temperature range is [12,20)℃, the second temperature range is [8,12)℃, and the third temperature range is less than 8℃. The first temperature range is higher, and it is easier and faster for refrigeration to reach the target temperature. The refrigeration module only needs to work during the water outlet stage, and the heat dissipation component only needs to use wastewater to flow through the wastewater water cooling plate for heat dissipation, and there is no need to start the heat dissipation fan. The second temperature range is relatively low, and it is still relatively easy and fast for refrigeration to reach the target temperature. It also only needs to work during the water outlet stage, and the wastewater flows through the wastewater water cooling plate and controls the heat dissipation fan to work together for heat dissipation. The third temperature is lower, and pre-temperature adjustment is required during the non-water outlet stage. The refrigeration module works to store cold in the cold storage module and cools the temperature to a lower pre-temperature. When entering the water outlet stage, the refrigeration module continues to work and combines the cold capacity of the cold storage module to cool the clean water together, which can quickly cool the clean water to the target temperature.

[0010] As a preferred solution, the calculation of the clean water flow rate when the clean water outlet temperature reaches the target temperature when the refrigeration module is in full power working state includes: The first coefficient and the second coefficient are set, the first coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate and the heat exchange area, and the second coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate, the heat exchange area and the normal temperature of the net water; The temperature of the purified water cooling plate is collected in real time, and the purified water flow rate is calculated based on the equation relationship between the product of the first coefficient and the target temperature and the second coefficient and the purified water cooling plate temperature.

[0011] This solution collects the temperature of the water purification cooling plate in real time, and solves the water purification flow rate in the current water purification cooling plate temperature collection cycle based on the relationship between the water purification cooling plate temperature and the target temperature. And by calculating the water purification flow rate in real time, the water purification flow rate is dynamically adjusted in real time to keep the water purification outlet temperature at the target temperature. The relationship between the water purification cooling plate temperature and the target temperature is expressed as follows: T i =K*T s +a Where K is the first coefficient, a is the second coefficient, K=(4.2 / hA)Q m +0.5 a=(0.5-(4.2 / hA)Q m +0.5)T c Among them, T s is the target temperature, T i is the standard temperature of the clean water cooling plate when the target temperature is reached, h is the convection heat transfer coefficient of the clean water cooling plate, A is the heat transfer area of ​​the clean water cooling plate, T cis the normal temperature of the purified water, which is 25°C, to represent the temperature of the water without treatment, Q m is the clean water flow rate, which is the mass flow rate and is affected by the filter element of the water purification module. The range is 0~1.5L / min. 4.2 is the specific heat capacity of water, the unit is J / g. 0.5 is the coefficient after the formula is simplified, and the value range is 0.42~0.6, and the typical value is 0.5.

[0012] As a preferred solution, a preheating temperature is set, and in the non-water-out stage, the refrigeration module works, and the cooling fan is controlled to work to cool the cold storage module to the preheating temperature and maintain stability.

[0013] When the target temperature is in the third temperature range, preheating treatment is required. According to the third temperature range, the preheating temperature is generally set to -20℃-5℃. The preheating temperature should be lower than the target temperature. A mapping relationship table between the target temperature and the preheating temperature can be set in advance, and the corresponding preheating temperature can be selected according to the target temperature for preheating operation.

[0014] As a preferred solution, the outlet temperature of purified water is obtained in real time and compared with the target temperature. When the outlet temperature of purified water is not equal to the target temperature, and the outlet temperature of purified water is greater than the target temperature, the pressure of the purified water module is increased, and the wastewater ratio is adjusted until the outlet temperature of purified water is consistent with the target temperature. The pressure adjustment is stopped, and purified water is output at the current wastewater ratio. Purified water of the target temperature is obtained after passing through the purified water cooling plate; When the purified water outlet temperature is not equal to the target temperature, and the purified water outlet temperature is lower than the target temperature, reduce the pressure of the purified water module and adjust the waste water ratio until the purified water outlet temperature is consistent with the target temperature. Stop the pressure adjustment and output purified water at the current waste water ratio. After passing through the purified water cooling plate, the purified water at the target temperature is obtained.

[0015] This solution compares the outlet temperature of purified water with the target temperature. If they are not equal, it means that the temperature of the purified water cooling plate under the current purified water flow rate cannot adjust the outlet temperature of purified water to the target temperature. By adjusting the pressure of the purified water module, that is, adjusting the wastewater ratio, that is, adjusting the purified water flow rate, the pressure is adjusted until the outlet temperature of purified water of the cooling plate is equal to the target temperature. When the outlet temperature of purified water is higher than the target temperature, the purified water flow rate is reduced by lowering the pressure of the purified water module, and when the purified water temperature is lower than the target temperature, the purified water flow rate is increased by increasing the pressure of the purified water module. After stopping the pressure adjustment, the purified water is output at the current wastewater ratio. After the temperature of the purified water is adjusted by the temperature of the purified water cooling plate to reach the target temperature, it flows into the user's water container and the user can drink it directly. In addition, the wastewater flows into the wastewater cooling plate, takes away the heat, and is discharged into the drainage pipe through the drain port.

[0016] As a preferred solution, a sterilization mode is also included, including the following steps: In the non-water-out stage, the refrigeration module is controlled to heat the purified water cooling plate to the sterilization temperature, the water outlet switch is turned on, the water flowing through the purified water cooling plate is heated and discharged, and the normal working mode is restored after the sterilization mode ends.

[0017] The water purifier of this solution can also use the heating function of the refrigeration module to achieve sterilization at any time during the non-water discharge stage, avoiding the inconvenience and incomplete sterilization problems of traditional cold tank and compressor water purifiers. In order to avoid the problem of large-scale bacterial growth in the cold water in the water cooling plate of the water purifier, users can set it to timed sterilization according to their preferences, start the heating function of the refrigeration module at the set time, heat the temperature of the water purification water cooling plate to the sterilization temperature to achieve high-temperature sterilization. The sterilization temperature is a pre-set temperature, and the device turns on the water outlet switch. The water in the water purification module is filtered to form clean water that flows into the water purification water cooling plate. The cooling mode heats the clean water flowing through, and the high-temperature clean water flushes the water purification water cooling plate, pats away the dirt and discharges it. After the sterilization mode, the water purifier resumes its normal working mode.

[0018] A water purifier temperature control device comprises a water purification module, a refrigeration module, a heat dissipation module and a control module. The refrigeration module comprises a water purification cooling plate and a semiconductor cooling plate. The water purification cooling plate is arranged at the cold end of the semiconductor cooling plate, and a cold storage module is arranged on the water purification cooling plate. The heat dissipation module comprises a wastewater cooling plate, which is arranged at the hot end of the semiconductor refrigeration plate, and a radiator and a cooling fan are arranged on the other side of the wastewater cooling plate; The control module is respectively connected with the semiconductor cooling sheet and the cooling fan control; The water purification module is connected to the input end of the clean water cooling plate through a clean water pipe, and is connected to the input end of the waste water cooling plate through a waste water pipe.

[0019] Normal temperature water is stored in the water purification module, which also includes a filter assembly. After filtering the water through the filter assembly, two paths are output, one path is clean water and the other path is waste water. The clean water is connected to the clean water water cooling plate through the clean water pipe, and the waste water is connected to the waste water water cooling plate through the waste water pipe, wherein a water outlet valve is provided on the clean water pipe to control the outlet of the clean water. The refrigeration module is used to refrigerate the clean water input to the clean water water cooling plate. The control module is used to control the operation of the refrigeration module and control the refrigeration so that the output clean water is at the set target temperature. The specific refrigeration module uses a water cooling plate for heat exchange. The water cooling plate is preferably made of aluminum, and other materials with good thermal conductivity such as copper can also be used. The surface of the aluminum parts is coated with a food-grade coating, which has better thermal conductivity than stainless steel materials and solves the food-grade requirements of clean water. The clean water is passed into the clean water cooling plate, and a semiconductor refrigeration sheet is provided on the cold end of the clean water cooling plate to cool the water cooling plate. The heat dissipation module dissipates the heat of the semiconductor refrigeration plate. A wastewater cooling plate is set on the hot end of the semiconductor refrigeration plate. The wastewater flowing through it takes away the heat. A radiator is set on the wastewater cooling plate. A cooling fan is set on the radiator. The cooling fan dissipates the heat of the wastewater cooling plate. A composite heat dissipation method is adopted, and the heat dissipation efficiency is high. The cold storage module is tightly attached to the water purification cooling plate. Water or other filling materials with strong energy storage are used inside the cold storage module. When the water purifier does not produce water, cold storage can be performed. In order to further reduce the loss of cold, insulation materials are all attached to the cold end surface of the semiconductor refrigeration plate. The output end of the water purification cooling plate is connected to the water outlet, and the output end of the wastewater cooling plate is connected to the drain.

[0020] As a preferred solution, a first temperature sensor is provided on the purified water cooling plate, and a second temperature sensor is provided on the output end of the purified water cooling plate.

[0021] In this solution, the first temperature sensor is set in the middle of the water purification cooling plate to detect the temperature of the water purification cooling plate, and the second temperature sensor is set at the output end of the water purification cooling plate to detect the outlet water temperature of the water purification cooling plate. The detected temperature is sent to the control module for refrigeration control.

[0022] As a preferred solution, the clean water cooling plate and the waste water cooling plate include an internal cavity, in which a number of staggered partitions are arranged, the partitions divide the cavity into a circuitous channel, the input and output ends of the cooling plate are respectively arranged at both ends of the channel, and a plurality of heat exchange modules are arranged in the channel, and the heat exchange modules include a plurality of fins arranged along the water flow direction of the channel.

[0023] The clean water cooling plate has the same structure as the waste water cooling plate, both of which adopt a plate-like structure. A number of staggered partitions are arranged in the cavity. The partitions divide the cavity into a circuitous channel, which increases the heat exchange path, and multiple heat exchange modules are arranged on the channel. The heat exchange module is a plurality of fins arranged along the water flow direction. The upper and lower ends of the fins are respectively connected to the inner surface of the water cooling plate, and microchannels for water flow are formed between the fins. Multiple fins increase the heat exchange area and improve the heat exchange efficiency.

[0024] Therefore, the advantages of the present invention are: it realizes the real-time output of ice water for household and commercial water purifiers, and the water purifier can output water at different temperatures through the temperature control method. No compressor refrigeration system is required, which solves the problem of long initial refrigeration time of compressors and semiconductor air-cooled types, and by calculating the purified water flow rate, the purified water outlet temperature is accurately controlled to reach the target temperature, and the purified water temperature is adjusted by real-time temperature control to achieve the purpose of drinking ice water at any time. No ice tank structure is required for water storage, which reduces the space occupied by the ice tank and avoids bacterial growth. Different working modes are set according to the target temperature to achieve multi-temperature control and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the device of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the water cooling plate in the present invention.

[0027] Figure 3 It is a schematic flow chart of the method of the present invention.

[0028] 1- water purification module 2- refrigeration module 3- heat dissipation module 4- control module 21- semiconductor refrigeration plate 22- water purification water cooling plate 23- cold storage module 31- wastewater water cooling plate 32- radiator 33- cooling fan 51- partition 52- channel 53- fin. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0030] Embodiment 1: This embodiment provides a temperature control method for a water purifier, wherein the water purifier includes a refrigeration module 2 and a heat dissipation module 3, wherein the refrigeration module includes a semiconductor refrigeration sheet and a purified water cooling plate disposed at the cold end of the semiconductor refrigeration sheet, and the heat dissipation module includes a wastewater cooling plate disposed at the hot end of the semiconductor refrigeration sheet, a radiator disposed on the wastewater cooling plate, and a heat dissipation fan. Figure 3 As shown, the method comprises the following steps: S1. Get the target temperature and set the working mode according to the target temperature.

[0031] Specifically, the outlet water temperature is set to three ranges, and the range in which the target temperature is located is determined, and different working modes are used for each range.

[0032] In this embodiment, the purified water outlet temperature is set into three levels from high to low, which are respectively recorded as the first temperature range, the second temperature range and the third temperature range. As an example of this embodiment, the first temperature range is set to 12~20℃, recorded as [12,20)℃, the second temperature range is set to 8~12℃, recorded as [8,12)℃, and the third temperature range is set to less than 8℃. The temperature range setting is not limited to the above settings and can be set according to needs. For example, if the ice water temperature is required to be lower, the overall temperature range can be adjusted lower.

[0033] Different working modes are set according to different temperature ranges, and the first working mode, the second working mode and the third working mode are respectively set according to the above corresponding three temperature ranges. The specific first working mode is that the refrigeration module starts working during the water outlet stage of the water purifier. It only needs the wastewater to flow through the wastewater water cooling plate for heat dissipation, and the cooling fan does not need to be started. The first working mode corresponds to the first temperature range. The first temperature range is higher, and it is easier and faster for the refrigeration to reach the target temperature. The refrigeration module only needs to work during the water outlet stage, and the heat is dissipated through the wastewater water cooling plate, and there is no need to turn on the cooling fan. The second working mode is that the refrigeration module works during the water outlet stage of the water purifier, and the wastewater flows through the wastewater water cooling plate for heat dissipation, and the cooling fan is started to dissipate heat together. The second working mode corresponds to the second temperature range. The second temperature range is relatively low, but it is still relatively easy and fast for the refrigeration to reach the target temperature. It also only needs to work during the water outlet stage, and the wastewater flows through the wastewater water cooling plate and controls the cooling fan to work together for heat dissipation. The third working mode is to perform pre-temperature adjustment in the non-water outlet stage, enter the water outlet stage, keep the refrigeration module working, and the waste water flows through the waste water cooling plate to dissipate heat, while controlling the cooling fan to work together to dissipate heat.

[0034] The pre-temperature adjustment of the third working mode specifically includes setting the pre-temperature. In the non-water-out stage, the refrigeration module works, controls the cooling fan to work, cools down the cold storage module, reduces it to the pre-temperature and maintains stability. For pre-temperature treatment, the pre-temperature is generally set to -20℃-5℃ according to the third temperature range. The pre-temperature should be lower than the target temperature. The mapping relationship table between the target temperature and the pre-temperature can be pre-set, and the corresponding pre-temperature is selected according to the target temperature for pre-temperature operation. The third working mode corresponds to the third temperature range. The third temperature is relatively low, and pre-temperature adjustment is required in the non-water-out stage. The refrigeration module works to store cold in the cold storage module and cools the temperature to a lower pre-temperature. When entering the water-out stage, the refrigeration module continues to work and combines the cold capacity of the cold storage module to cool the clean water, which can quickly cool the clean water to the target temperature.

[0035] By obtaining the target water outlet temperature set by the water purifier, the process of setting the working mode according to the target temperature includes: determining in which temperature range the target temperature falls, When the target temperature is in the first temperature range, the cooling module starts to work in the water outlet stage, and the wastewater flows through the wastewater cooling plate for heat dissipation; When the target temperature is in the second temperature range, the cooling module starts to work in the water outlet stage, and the wastewater flows through the wastewater cooling plate and controls the cooling fan to work together to dissipate heat; When the target is in the third temperature range, pre-temperature adjustment is performed in the non-water outlet stage, and the water outlet stage is entered to keep the refrigeration module working. The wastewater flows through the wastewater cooling plate and controls the cooling fan to work together for heat dissipation.

[0036] S2. Collect the temperature of the purified water cooling plate in real time during the water outlet phase, and calculate the purified water flow rate when the purified water outlet temperature reaches the target temperature when the refrigeration module is working at full power; including: The first coefficient and the second coefficient are set, the first coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate and the heat exchange area, and the second coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate, the heat exchange area and the normal temperature of the net water; The temperature of the purified water cooling plate is collected in real time, and the purified water flow rate is calculated based on the equation relationship between the product of the first coefficient and the target temperature and the second coefficient and the purified water cooling plate temperature.

[0037] By collecting the temperature of the water purification cold plate in real time and according to the relationship between the water purification cold plate temperature and the target temperature, the water purification flow rate in the current water purification cold plate temperature collection cycle is solved, and the water purification outlet is controlled by the water purification flow rate. As the temperature of the water purification cold plate changes, the water purification flow rate is continuously adjusted to keep the water purification outlet temperature at the target temperature. The temperature change of the water purification cold plate starts from the temperature when the refrigeration module starts to work. Taking normal temperature as an example, the refrigeration temperature is gradually cooled to the standard temperature through the refrigeration module. In this process, the water purification flow rate is adjusted, and the water purification outlet speed changes from slow to fast, and then the speed is maintained. The speed is linear, and the change in water outlet speed will not affect the user experience.

[0038] The relationship between the temperature of the clean water cooling plate and the target temperature is expressed as follows: T i =K*T s +a Where K is the first coefficient, a is the second coefficient, K=(4.2 / hA)Q m +0.5 a=(0.5-(4.2 / hA)Q m +0.5)T c Among them, Ts is the target temperature, T i is the standard temperature of the clean water cooling plate when the target temperature is reached, h is the convection heat transfer coefficient of the clean water cooling plate, A is the heat transfer area of ​​the clean water cooling plate, T c is the normal temperature of the purified water, which is 25°C, to represent the temperature of the water without treatment, Q m is the clean water flow rate, which is the mass flow rate and is affected by the filter element of the water purification module. The range is 0~1.5L / min. 4.2 is the specific heat capacity of water, the unit is J / g. 0.5 is the coefficient after the formula is simplified, and the value range is 0.42~0.6, and the typical value is 0.5.

[0039] S3. Control the water outlet of the water purifier according to the calculated purified water flow rate.

[0040] The water purifier also includes a sterilization mode, which is used in the non-water discharge stage and directly uses the heating function of the refrigeration module to achieve sterilization at any time. The sterilization mode specifically includes the following processes: In the non-water-out stage, the refrigeration module is controlled to heat the purified water cooling plate to the sterilization temperature, the water outlet switch is turned on, the water flowing through the purified water cooling plate is heated and discharged, and the normal working mode is restored after the sterilization mode ends.

[0041] The water purifier can also use the refrigeration module heating function to achieve sterilization at any time during the non-water discharge stage, avoiding the inconvenience and incomplete sterilization problems of traditional cold tank and compressor water purifiers. In order to avoid the problem of large-scale bacterial growth in the cold water of the water purifier water cooling plate, users can set it to timed sterilization according to their preferences, start the refrigeration module heating function at the set time, heat the water purification water cooling plate temperature to the sterilization temperature to achieve high-temperature sterilization. The sterilization temperature is a pre-set temperature, and the device turns on the water outlet switch. The water in the water purification module is filtered to form clean water that flows into the water purification water cooling plate. The cooling mode heats the clean water flowing through, and the high-temperature clean water flushes the water purification water cooling plate, pats away the dirt and discharges it. After the sterilization mode, the water purifier resumes its normal working mode.

[0042] This embodiment also discloses a water purifier temperature control device, comprising: Water purification module 1, outputs purified water and waste water after filtering; Refrigeration module 2, refrigerating the purified water passing through; Heat dissipation module 3, dissipating heat from the refrigeration module; Control module 4 obtains the target temperature and sets the working mode according to the target temperature; collects the temperature of the purified water cooling plate in real time during the water outlet stage, calculates the purified water flow rate when the purified water outlet temperature reaches the target temperature when the refrigeration module is working at full power; and controls the water outlet according to the calculated purified water flow rate.

[0043] like Figure 1As shown, the refrigeration module includes a clean water cooling plate 22 and a semiconductor cooling plate 21, the clean water cooling plate is arranged at the cold end of the semiconductor cooling plate, and a cold storage module 23 is arranged on the clean water cooling plate. The heat dissipation module includes a waste water cooling plate 31, the waste water cooling plate is arranged at the hot end of the semiconductor cooling plate, and a radiator 32 and a cooling fan 33 are arranged on the other side of the waste water cooling plate. The clean water module is connected to the clean water cooling plate input end through a clean water pipe, connected to the waste water cooling plate input end through a waste water pipe, the clean water cooling plate output end is connected to the water outlet, and the waste water cooling plate output end is connected to the drain. Normal temperature water is stored in the clean water module, and the clean water module includes a filter assembly, which outputs two ways after filtering the water through the filter assembly, one way is clean water, and the other way is waste water. The clean water is connected to the clean water cooling plate through the clean water pipe, and the waste water is connected to the waste water cooling plate through the waste water pipe, wherein a water outlet valve is arranged on the clean water pipe to control the clean water outlet. The refrigeration module is used to cool the clean water input to the water purification water cooling plate. It uses a water cooling plate for heat exchange. The water cooling plate is preferably made of aluminum, and other materials with good thermal conductivity such as copper can also be used. The surface of the aluminum parts is coated with food grade coating, which has better thermal conductivity than stainless steel materials and meets the food grade requirements of clean water. Clean water is passed into the water purification water cooling plate, and a semiconductor cooling plate is set on the cold end of the water purification water cooling plate to cool the water cooling plate. The heat dissipation module dissipates the heat of the semiconductor cooling plate. A wastewater water cooling plate is set on the hot end of the semiconductor cooling plate, and the heat is taken away by the wastewater flowing through. A radiator is set on the wastewater water cooling plate, and a cooling fan is set on the radiator. The cooling fan dissipates the heat of the wastewater water cooling plate, adopts composite heat dissipation, and has high heat dissipation efficiency. The cold storage module is closely attached to the water purification water cooling plate. The inside of the cold storage module uses water or other filling materials with strong energy storage. When the water purifier does not produce water, it can store cold. In order to further reduce the loss of cold, the cold end surface of the semiconductor cooling plate is all covered with insulation materials. A first temperature sensor is provided on the water purification cooling plate, and a second temperature sensor is provided on the output end of the water purification cooling plate. The first temperature sensor is provided in the middle of the water purification cooling plate to detect the temperature of the water purification cooling plate, and the second temperature sensor is provided on the output end of the water purification cooling plate to detect the outlet water temperature of the water purification cooling plate. The outlet water temperature of the water purification cooling plate is different from the temperature of the water purification cooling plate. The detected temperature is sent to the control module.

[0044] like Figure 2As shown, the clean water cooling plate and the waste water cooling plate include an internal cavity, in which a number of staggered partitions 51 are arranged, the partitions divide the cavity to form a circuitous channel 52, the water cooling plate input end and the output end are respectively arranged at both ends of the channel, and a plurality of heat exchange modules are arranged in the channel, and the heat exchange module includes a plurality of fins 53 arranged along the water flow direction of the channel. The clean water cooling plate has the same structure as the waste water cooling plate, a number of staggered partitions are arranged in the cavity, the partitions divide the cavity to form a circuitous channel, increase the heat exchange path, and a plurality of heat exchange modules are arranged on the channel, the heat exchange module is a plurality of fins arranged along the water flow direction, the upper and lower ends of the fins are respectively connected to the inner surface of the water cooling plate, and a microchannel for water flow is formed between the fins, and a plurality of fins increase the heat exchange area and improve the heat exchange efficiency.

[0045] Embodiment 2: This embodiment provides a second implementation method of a water purifier temperature control method. Figure 3 As shown, the following steps are included: S1. Get the target temperature and set the working mode according to the target temperature.

[0046] S2. Collect the temperature of the purified water cooling plate in real time during the water outlet phase, and calculate the purified water flow rate when the purified water outlet temperature reaches the target temperature when the refrigeration module is working at full power; S3. Obtain the outlet temperature of purified water in real time, compare the outlet temperature of purified water with the target temperature, and if the target temperature is not reached, adjust the pressure of the water purification module until the outlet temperature of purified water reaches the target temperature; S4. Control the water output of the water purifier according to the purified water flow rate.

[0047] In this embodiment, step S3 also calibrates the purified water outlet temperature, which specifically includes: Get the purified water outlet temperature in real time and set the purified water outlet temperature T o With the target temperature T s Compare, When the outlet temperature of purified water is not equal to the target temperature, and the outlet temperature of purified water is greater than the target temperature, the pressure of the purified water module is increased, and the wastewater ratio is adjusted until the outlet temperature of purified water is consistent with the target temperature. The pressure adjustment is stopped, and purified water is output at the current wastewater ratio. Purified water of the target temperature is obtained after passing through the purified water cooling plate; When the purified water outlet temperature is not equal to the target temperature, and the purified water outlet temperature is lower than the target temperature, reduce the pressure of the purified water module and adjust the waste water ratio until the purified water outlet temperature is consistent with the target temperature. Stop the pressure adjustment and output purified water at the current waste water ratio. After passing through the purified water cooling plate, the purified water at the target temperature is obtained.

[0048] This step is carried out between two changes in the clean water flow rate. Calibration is performed when the difference between the inlet and outlet water temperatures and the target temperature is large. Generally, slight temperature differences do not need to be calibrated. By comparing the clean water outlet temperature with the target temperature, or comparing it with the temperature range where the target temperature is located, if they are not equal, it means that the temperature of the clean water cooling plate under the current clean water flow cannot adjust the clean water outlet temperature to the target temperature. By adjusting the pressure of the clean water module, that is, adjusting the wastewater ratio, that is, adjusting the clean water flow, the pressure is adjusted until the clean water outlet temperature of the water cooling plate is equal to the target temperature. When the clean water outlet temperature is higher than the target temperature, the clean water flow rate is reduced by reducing the pressure of the clean water module, and when the clean water temperature is lower than the target temperature, the clean water flow rate is increased by increasing the pressure of the clean water module. After stopping the pressure adjustment, the clean water is output at the current wastewater ratio. After the clean water reaches the target temperature after the temperature adjustment of the clean water cooling plate, it flows into the user's water container, and the user can drink it directly. In addition, the wastewater flows into the wastewater cooling plate, takes away the heat, and is discharged to the drainage pipe through the drain port.

[0049] The other steps of this embodiment are the same as those of Embodiment 1, and are as follows: Specifically, step S1 is to set the outlet water temperature to three ranges, determine the range in which the target temperature is located, and operate in different working modes respectively.

[0050] In this embodiment, the purified water outlet temperature is set into three levels from high to low, which are respectively recorded as the first temperature range, the second temperature range and the third temperature range. As an example of this embodiment, the first temperature range is set to 12~20℃, recorded as [12,20)℃, the second temperature range is set to 8~12℃, recorded as [8,12)℃, and the third temperature range is set to less than 8℃. The temperature range setting is not limited to the above settings and can be set according to needs. For example, if the ice water temperature is required to be lower, the overall temperature range can be adjusted lower.

[0051] Different working modes are set according to different temperature ranges, and the first working mode, the second working mode and the third working mode are respectively set according to the above corresponding three temperature ranges. The specific first working mode is that the refrigeration module starts working during the water outlet stage of the water purifier. It only needs the wastewater to flow through the wastewater water cooling plate for heat dissipation, and the cooling fan does not need to be started. The first working mode corresponds to the first temperature range. The first temperature range is higher, and it is easier and faster for the refrigeration to reach the target temperature. The refrigeration module only needs to work during the water outlet stage, and the heat is dissipated through the wastewater water cooling plate, and there is no need to turn on the cooling fan. The second working mode is that the refrigeration module works during the water outlet stage of the water purifier, and the wastewater flows through the wastewater water cooling plate for heat dissipation, and the cooling fan is started to dissipate heat together. The second working mode corresponds to the second temperature range. The second temperature range is relatively low, but it is still relatively easy and fast for the refrigeration to reach the target temperature. It also only needs to work during the water outlet stage, and the wastewater flows through the wastewater water cooling plate and controls the cooling fan to work together for heat dissipation. The third working mode is to perform pre-temperature adjustment in the non-water outlet stage, enter the water outlet stage, keep the refrigeration module working, and the waste water flows through the waste water cooling plate to dissipate heat, while controlling the cooling fan to work together to dissipate heat.

[0052] The pre-temperature adjustment of the third working mode specifically includes setting the pre-temperature. In the non-water-out stage, the refrigeration module works, controls the cooling fan to work, cools down the cold storage module, reduces it to the pre-temperature and maintains stability. For pre-temperature treatment, the pre-temperature is generally set to -20℃-5℃ according to the third temperature range. The pre-temperature should be lower than the target temperature. The mapping relationship table between the target temperature and the pre-temperature can be pre-set, and the corresponding pre-temperature is selected according to the target temperature for pre-temperature operation. The third working mode corresponds to the third temperature range. The third temperature is relatively low, and pre-temperature adjustment is required in the non-water-out stage. The refrigeration module works to store cold in the cold storage module and cools the temperature to a lower pre-temperature. When entering the water-out stage, the refrigeration module continues to work and combines the cold capacity of the cold storage module to cool the clean water, which can quickly cool the clean water to the target temperature.

[0053] By obtaining the target water outlet temperature set by the water purifier, the process of setting the working mode according to the target temperature includes: determining in which temperature range the target temperature falls, When the target temperature is within the first temperature range, the first working mode is performed; When the target temperature is within the second temperature range, the second working mode is performed; When the target is in the third temperature range, the third working mode is performed.

[0054] Step S2 specifically includes setting a first coefficient and a second coefficient, wherein the first coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate and the heat exchange area, and the second coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate, the heat exchange area and the normal temperature of the net water; The temperature of the purified water cooling plate is collected in real time, and the purified water flow rate is calculated based on the equation relationship between the product of the first coefficient and the target temperature and the second coefficient and the purified water cooling plate temperature.

[0055] The relationship between the temperature of the clean water cooling plate and the target temperature is expressed as follows: T i =K*T s +a Where K is the first coefficient, a is the second coefficient, K=(4.2 / hA)Q m +0.5 a=(0.5-(4.2 / hA)Q m +0.5)T c Among them, T s is the target temperature, T i is the standard temperature of the clean water cooling plate when the target temperature is reached, h is the convection heat transfer coefficient of the clean water cooling plate, A is the heat transfer area of ​​the clean water cooling plate, T c is the normal temperature of the purified water, which is 25°C, to represent the temperature of the water without treatment, Q m is the clean water flow rate, which is the mass flow rate and is affected by the filter element of the water purification module. The range is 0~1.5L / min. 4.2 is the specific heat capacity of water, the unit is J / g. 0.5 is the coefficient after the formula is simplified, and the value range is 0.42~0.6, and the typical value is 0.5.

[0056] The water purifier also includes a sterilization mode, which is used in the non-water discharge stage and directly uses the heating function of the refrigeration module to achieve sterilization at any time. The sterilization mode specifically includes the following processes: In the non-water-out stage, the refrigeration module is controlled to heat the purified water cooling plate to the sterilization temperature, the water outlet switch is turned on, the water flowing through the purified water cooling plate is heated and discharged, and the normal working mode is restored after the sterilization mode ends.

[0057] The water purifier can also use the refrigeration module heating function to achieve sterilization at any time during the non-water discharge stage, avoiding the inconvenience and incomplete sterilization problems of traditional cold tank and compressor water purifiers. In order to avoid the problem of large-scale bacterial growth in the cold water of the water purifier water cooling plate, users can set it to timed sterilization according to their preferences, start the refrigeration module heating function at the set time, heat the water purification water cooling plate temperature to the sterilization temperature to achieve high-temperature sterilization. The sterilization temperature is a pre-set temperature, and the device turns on the water outlet switch. The water in the water purification module is filtered to form clean water that flows into the water purification water cooling plate. The cooling mode heats the clean water flowing through, and the high-temperature clean water flushes the water purification water cooling plate, pats away the dirt and discharges it. After the sterilization mode, the water purifier resumes its normal working mode.

[0058] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0059] Although the terms such as water purification module, refrigeration module, heat dissipation module, control module, semiconductor refrigeration sheet, water purification cooling plate, etc. are frequently used in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A water purifier temperature control method, characterized in that: include Get the target temperature and set the working mode according to the target temperature; During the water outlet phase, the temperature of the purified water cooling plate (22) is collected in real time, and the purified water flow rate is calculated when the purified water outlet temperature reaches the target temperature when the refrigeration module (2) is operating at full power; The water outlet is controlled according to the calculated clean water flow rate.

2. A water purifier temperature control method according to claim 1, characterized in that Set the purified water outlet temperature to three ranges, determine the target temperature range, and work in different working modes.

3. A water purifier temperature control method according to claim 2, characterized in that: Set three ranges from high to low according to the temperature. When the target temperature is within the first temperature range, the refrigeration module starts to work in the water outlet phase, and wastewater flows through the wastewater cooling plate (31) for heat dissipation; When the target temperature is within the second temperature range, the refrigeration module starts to work in the water outlet phase, and wastewater flows through the wastewater cooling plate (31) and controls the cooling fan (33) to work together to dissipate heat; When the target is in the third temperature range, pre-temperature adjustment is performed in the non-water outlet phase, and the water outlet phase is entered to keep the refrigeration module working, and wastewater flows through the wastewater cooling plate (31) and controls the cooling fan (33) to work together to dissipate heat.

4. A water purifier temperature control method according to claim 1, characterized in that The calculation of the clean water flow rate when the clean water outlet temperature reaches the target temperature when the refrigeration module is in full power working state includes: The first coefficient and the second coefficient are set, the first coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate and the heat exchange area, and the second coefficient is calculated based on the net water flow rate, the convection heat transfer coefficient of the net water cooling plate, the heat exchange area and the normal temperature of the net water; The temperature of the purified water cooling plate is collected in real time, and the purified water flow rate is calculated based on the equation relationship between the product of the first coefficient and the target temperature and the second coefficient and the purified water cooling plate temperature.

5. A water purifier temperature control method according to claim 3, characterized in that The pre-temperature adjustment comprises: The preheating temperature is set, and in the non-water discharge stage, the refrigeration module (2) operates, and the cooling fan (33) is controlled to operate, so as to cool the cold storage module (23) to the preheating temperature and maintain stability.

6. A water purifier temperature control method according to any one of claims 1 to 5, characterized in that The water outlet stage also includes the steps of correcting the outlet temperature of the purified water, including: Get the purified water outlet temperature in real time and compare it with the target temperature. When the outlet temperature of purified water is not equal to the target temperature, and the outlet temperature of purified water is greater than the target temperature, the pressure of the purified water module is increased, and the wastewater ratio is adjusted until the outlet temperature of purified water is consistent with the target temperature. The pressure adjustment is stopped, and purified water is output at the current wastewater ratio. Purified water of the target temperature is obtained after passing through the purified water cooling plate; When the purified water outlet temperature is not equal to the target temperature, and the purified water outlet temperature is lower than the target temperature, reduce the pressure of the purified water module and adjust the waste water ratio until the purified water outlet temperature is consistent with the target temperature. Stop the pressure adjustment and output purified water at the current waste water ratio. After passing through the purified water cooling plate, the purified water at the target temperature is obtained.

7. A water purifier temperature control method according to any one of claims 1 to 5, characterized in that Also included is a sterilization mode, which includes the following steps: In the non-water discharge stage, the refrigeration module (2) is controlled to heat the purified water cooling plate to the sterilization temperature, the water discharge switch is turned on, the water flowing through the purified water cooling plate is heated and discharged, and the normal working mode is restored after the sterilization mode ends.

8. A temperature control device for a water purifier, implementing the method described in any one of claims 1 to 7, characterized in that: It comprises a water purification module (1), a refrigeration module (2), a heat dissipation module (3) and a control module (4). A refrigeration module, comprising a water purification cooling plate (22) and a semiconductor cooling plate (21), wherein the water purification cooling plate is arranged at a cold end of the semiconductor cooling plate, and a cold storage module (23) is arranged on the water purification cooling plate; A heat dissipation module, comprising a wastewater cooling plate (31), the wastewater cooling plate being arranged at the hot end of the semiconductor cooling plate (21), and a radiator (32) and a heat dissipation fan (33) being arranged on the other side of the wastewater cooling plate; A control module is respectively connected to the semiconductor cooling sheet (21) and the cooling fan (33); The water purification module is connected to the input end of the clean water cooling plate (22) via a clean water pipe, and is connected to the input end of the waste water cooling plate (31) via a waste water pipe.

9. A water purifier temperature control device according to claim 8, characterized in that A first temperature sensor is arranged on the purified water cooling plate, and a second temperature sensor is arranged on the output end of the purified water cooling plate.

10. A water purifier temperature control device according to claim 8 or 9, characterized in that The clean water cooling plate (22) and the waste water cooling plate (31) comprise an internal cavity, in which a plurality of staggered partitions (51) are arranged, the partitions dividing the cavity to form a circuitous channel (52), the water cooling plate input end and output end are respectively arranged at two ends of the channel, a plurality of heat exchange modules are arranged in the channel, and the heat exchange modules comprise a plurality of fins (53) arranged along the water flow direction of the channel.

Images