Refrigeration control method and water purifier

Abstract

The invention discloses a refrigeration control method and a water purifier, and belongs to the technical field of household appliances. The refrigeration control unit judges whether the first detection water temperature in the cold tank is larger than or equal to the first preset temperature within the continuous first preset time or not, if yes, the compressor is started, and refrigeration operation is started; in the refrigeration process, the control unit determines the second detection water temperature in the cold tank in real time; judging whether the second detection water temperature is smaller than or equal to a second preset temperature within continuous second preset time, if yes, closing the compressor, and stopping refrigeration operation; the first detection water temperature and the second detection water temperature are determined by comprehensively judging temperature detection values transmitted by a plurality of temperature sensors arranged in the cold tank through the control unit. The freezing phenomenon of the cold tank in the refrigeration process can be effectively prevented, the refrigeration speed is increased, and energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a refrigeration control method and a water purifier. Background Art

[0002] Water purifiers are one of the common equipment in modern enterprises and households. Most of the popular water purifiers in the market have refrigeration functions. Among them, water purifiers using compressor refrigeration are particularly suitable for occasions with a large number of people drinking water because of their fast refrigeration speed.

[0003] During the refrigeration process, the existing water purifier cold tank is prone to stratification due to the large temperature difference of the water in the cold tank. Even in the later stage of the refrigeration process, some areas in the cold tank have not reached the target temperature, but ice has already formed in some local areas.

[0004] On the one hand, ice formation will make the outlet water temperature of the water purifier unstable, affecting the user experience. In severe cases of ice formation, the inlet and outlet of the cold tank will freeze, resulting in the inability to drain water; the cold tank will crack due to low temperature; as the ice layer continues to thicken, the insulation effect of the ice layer prevents the cold from being transferred to the water, resulting in the water temperature not being able to drop, the compressor not stopping, and wasting a lot of electricity; due to the large on-off ratio of the compressor, the water purifier has insufficient cooling capacity and excessive energy consumption.

[0005] In order to prevent the cold tank from freezing during the refrigeration process, the prior art usually adopts a water circulation method. For example, patent publication number CN107906835A discloses a method for improving the refrigeration efficiency of a water dispenser and a water dispenser. In this application, when drinking water enters the cold tank and is refrigerated, at least within a set time before the outlet water temperature is reached, the drinking water to be refrigerated in the cold tank is allowed to flow continuously, and the flow rate is higher than the minimum water flow rate that can freeze the drinking water to be refrigerated, so as to inhibit the freezing of the cold tank. However, this method of suppressing freezing by water circulation is not effective in implementation, and freezing still occurs in some cases, and the energy consumption is relatively high.

[0006] Patent publication number CN107661018A discloses a refrigeration device and a water dispenser. The application sets the evaporator on the outer wall of the medium storage box, and sets an antifreeze layer on the inner wall of the medium storage box at a position corresponding to the evaporator. By setting the antifreeze layer, it is ensured that the refrigeration device will not freeze when obtaining low-temperature drinking water. However, the method of setting an antifreeze layer, which prevents freezing by adding additional structures, will increase the manufacturing cost of the water dispenser and increase the volume of the corresponding structure to a certain extent.

[0007] Patent publication number CN101245966A, the control unit of the water dispenser receives the cold water temperature signal from the cold water temperature sensor, and compares the cold water temperature value obtained from the cold water temperature signal with the critical temperature value of cold water freezing. When the cold water temperature value is lower than the critical temperature value of cold water freezing, the control unit obtains a specific comparison result, and controls the compressor to stop according to the comparison result to ensure that the cold water will not freeze. However, the judgment rule set in this application is relatively simple. If the temperature sensor has a deviation from the actual temperature due to resistance drift and other reasons, it may still cause freezing during the operation of the water dispenser. Summary of the invention

[0008] 1. Technical problem to be solved by the invention

[0009] The present invention provides a refrigeration control method and a water purifier, so as to effectively prevent the cold tank from freezing during the refrigeration process while meeting the refrigeration demand of the water purifier, thereby accelerating the refrigeration speed and saving energy consumption.

[0010] 2. Technical solution

[0011] In order to achieve the above object, the technical solution provided by the present invention is:

[0012] A refrigeration control method of the present invention,

[0013] The refrigeration control unit determines whether the first detected water temperature in the cold tank is greater than or equal to the first preset temperature within a continuous first preset time, and if so, starts the compressor to enter refrigeration operation;

[0014] During the refrigeration process, the control unit determines the second detected water temperature in the cold tank in real time;

[0015] and determining whether the second detected water temperature is less than or equal to the second preset temperature within a continuous second preset time, and if so, shutting down the compressor and stopping the refrigeration operation;

[0016] The first detected water temperature and the second detected water temperature are determined by the control unit through comprehensive evaluation of temperature detection values ​​transmitted by at least two temperature sensors arranged in the cold tank.

[0017] Furthermore, the refrigeration control unit respectively receives the first detection temperature transmitted by the first temperature sensor and the second detection temperature transmitted by the second temperature sensor, and comprehensively evaluates the first detection temperature and the second detection temperature to determine the first detection water temperature or the second detection water temperature; the first temperature sensor and the second temperature sensor are arranged in the cold tank, and the straight-line distance between the first temperature sensor and the second temperature sensor is less than 1 cm.

[0018] Furthermore, if the control unit determines that the first detection temperature and the second detection temperature are both greater than or equal to the third preset temperature and less than or equal to the fourth preset temperature;

[0019] The control unit then continues to compare the first detected temperature with the second detected temperature, and uses the smaller detected temperature value as the first detected water temperature or the second detected water temperature.

[0020] Furthermore, if the control unit determines that one of the first detection temperature and the second detection temperature is greater than or equal to the third preset temperature and less than or equal to the fourth preset temperature;

[0021] The control unit then uses the detected temperature value that meets the above conditions as the first detected water temperature or the second detected water temperature.

[0022] Furthermore, if the control unit determines that the first detection temperature and the second detection temperature are both lower than the third preset temperature, or higher than the fourth preset temperature;

[0023] The control unit then reports a fault and alerts the user.

[0024] Furthermore, during the refrigeration process, if the control unit determines that the first detection temperature and the second detection temperature are both greater than or equal to the first preset temperature and less than or equal to the fourth preset temperature, but the compressor operation time has exceeded the third preset time, the control unit turns off the compressor, stops the refrigeration operation, and reports a fault to alert the user.

[0025] Furthermore, when the control unit determines that the first detected temperature and the second detected temperature are both lower than the first preset temperature and higher than or equal to the third preset temperature, the control unit does not start the compressor for cooling.

[0026] Furthermore, after the compressor stops running and ends the refrigeration process, the control unit records the compressor stop time. If it is determined that the compressor stop time exceeds the fourth preset time, and one of the first detection temperature and the second detection temperature is lower than the first preset temperature and greater than or equal to the third preset temperature; the control unit regards the temperature sensor whose detection temperature value meets the said conditions as an abnormal sensor and shields it.

[0027] Furthermore, during the refrigeration process, the control unit detects the water temperature in the cold tank according to the second detection temperature;

[0028] When it is determined that the second detected water temperature is less than or equal to the fifth preset temperature, the circulation pump is turned on to circulate the water in the cold tank;

[0029] If the second detected water temperature is less than or equal to the fifth preset temperature and greater than the sixth preset temperature, the circulating pump is kept turned on for the fifth preset time and stopped for the sixth preset time, and the sixth preset time is 2-3 times of the fifth preset time;

[0030] If the second detected water temperature is less than or equal to the sixth preset temperature and greater than the seventh preset temperature, the circulation pump remains turned on for the seventh preset time and stops for the eighth preset time, and the seventh preset time is 1-2 times of the eighth preset time;

[0031] When the second detected water temperature is less than or equal to the seventh preset temperature and greater than the second preset temperature range, the circulating pump remains turned on and continues to work for a ninth preset time after the compressor stops.

[0032] A water purifier of the present invention has a refrigeration control unit comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the refrigeration control method is implemented when the computer program is executed by the processor.

[0033] 3. Beneficial effects

[0034] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0035] (1) A refrigeration control method of the present invention is to centrally set two temperature sensors in a certain area in the cold tank of the water purifier, and determine the temperature standard for turning on and off the refrigeration of the water purifier by comprehensively evaluating the temperature values ​​detected in real time by the two temperature sensors. The refrigeration is turned on only when the temperature detection values ​​of the two temperature sensors reach the first preset temperature, and the refrigeration is turned off when the temperature detection value of one temperature sensor is lower than the second preset temperature. This refrigeration mechanism can effectively prevent the cold tank from freezing during the refrigeration process.

[0036] (2) The present invention formulates a refrigeration strategy based on the temperature value detected by the temperature sensor to prevent the occurrence of icing. Compared with the prior art, the energy consumption and cost are significantly reduced, and two-way temperature signals are transmitted in real time for analysis by the control unit. Even if the temperature sensor has an open circuit, a short circuit, or resistance drift, the control unit can quickly judge and identify it, so as to avoid sensor failure or inaccurate sensor detection accuracy, or the deviation between the temperature detected by the sensor and the actual temperature, which may cause the entire machine to refrigerate and malfunction.

[0037] (3) During the refrigeration process, the present invention further formulates an operation strategy for the circulation pump. The scientific operation of the circulation pump can promote the heat transfer of water in different areas of the cold tank, accelerate the overall cooling rate of the water in the cold tank, improve the refrigeration efficiency, and further avoid the occurrence of freezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of an embodiment of a refrigeration control unit of a water purifier in the present invention;

[0039] Figure 2It is a flow chart of the refrigeration control method of the water purifier in the present invention;

[0040] Figure 3 It is a schematic diagram of a flow chart of an embodiment of determining the first detected water temperature and the second detected water temperature in the present invention;

[0041] Figure 4 It is a schematic diagram of a flow chart of another embodiment of determining the first detected water temperature and the second detected water temperature in the present invention;

[0042] Figure 5 It is a schematic diagram of a flow chart of a control unit in the present invention reporting a fault based on the first detected temperature and the second detected temperature;

[0043] Figure 6 It is a flow chart of the compressor running overtime fault reporting in the present invention;

[0044] Figure 7 It is a schematic diagram of the flow chart of the control unit not starting refrigeration in the present invention;

[0045] Figure 8 It is a schematic diagram of the process of judging the temperature sensor failure in the present invention;

[0046] Fig. 9 It is a schematic diagram of the flow chart of controlling the operation of the circulation pump in the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that in the embodiments of the present invention, there are descriptions involving "first", "second", etc., which are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] Example 1

[0050] Combination Figure 1, the refrigeration unit of the water purifier mainly includes a refrigeration control unit, a cold tank, a compressor, a circulating pump and a fan. The output end of the control unit is connected to the compressor, the circulating pump and the fan to control the operation of the compressor, the circulating pump and the fan. This embodiment is designed to detect the temperature of the liquid in the cold tank by two temperature sensors in the cold tank, that is, a first temperature sensor and a second temperature sensor are set in the cold tank. The refrigeration control unit receives the first detection temperature T1 transmitted by the first temperature sensor and the second detection temperature T2 transmitted by the second temperature sensor respectively. In order to ensure that the temperature readings of the two temperature sensors are close, the two temperature sensors are centrally installed in a certain position in the cold tank in this embodiment, and the straight-line distance between the first temperature sensor and the second temperature sensor needs to be less than 1 cm. At the same time, a water level sensor is also set in the cold tank in this embodiment. The water level sensor is used to judge the water level of the liquid in the cold tank. If the control unit receives the signal transmitted by the water level sensor and judges that the liquid water level in the cold tank reaches a low water level, the control unit will control the water replenishment solenoid valve to open to replenish water for the cold tank. The refrigeration control method of this embodiment needs to be performed when the control unit detects a high water level.

[0051] It is worth noting that the refrigeration unit of the water purifier needs to detect the temperature of the liquid at all times during use to control the operation of the refrigeration compressor. Therefore, the temperature sensor is an indispensable component. However, in order to prevent the occurrence of freezing, most existing designs use water circulation to keep the drinking water to be refrigerated flowing to inhibit the freezing of the cold tank. Alternatively, an antifreeze layer structure is added to prevent freezing, but the above solutions obviously do not have advantages in terms of energy consumption and cost.

[0052] Although existing technical solutions basically use temperature sensors to monitor the temperature of the liquid in the cold tank of the water purifier, few people think of formulating a refrigeration strategy based on the temperature value detected by the temperature sensor. According to the change of the temperature of the liquid in the cold tank, the operation of the compressor is adjusted and controlled at any time to avoid the compressor from refrigerating for a long time, so that the temperature of the liquid in the cold tank is kept above the freezing point to prevent ice from forming. However, formulating a refrigeration strategy based on the temperature value detected by the temperature sensor only requires changing the control program burned into the control unit. This method of preventing refrigeration and freezing through program control undoubtedly has significant advantages in terms of energy consumption and cost.

[0053] However, during the use of the temperature sensor, it is easy to cause the temperature sensor to open circuit, short circuit and resistance drift due to abnormal defects such as loose welding and package cracking, resulting in incorrect detection temperature. Especially when the temperature sensor has resistance drift, since the resistance drift of the temperature sensor is very random, the corresponding feedback temperature signal of the temperature sensor after the resistance drift is inconsistent with the actual temperature, but it may still be within the normal detection range. At this time, it is difficult to determine whether the detected temperature value fed back by the temperature sensor is accurate, low or high. If the detected temperature value is inaccurate, it may cause the compressor to continue to run and refrigeration to continue, then the freezing phenomenon is inevitable. For example, the patent CN101245966A cited in the background technology compares the cold water temperature value detected by the temperature sensor with the critical temperature value of cold water freezing, and controls the compressor to stop according to the comparison result to ensure that the cold water will not freeze. In this scheme, when the temperature detected by the temperature sensor deviates from the actual temperature due to resistance drift and other reasons, it is very likely that refrigeration will continue and ice will occur.

[0054] Combination Figure 2 The refrigeration control mechanism of this embodiment is specifically introduced below:

[0055] The refrigeration control unit receives the first detected temperature T1 transmitted by the first temperature sensor and the second detected temperature T2 transmitted by the second temperature sensor in real time, and the refrigeration control unit makes a comprehensive evaluation of the first detected temperature T1 and the second detected temperature T2 to determine in real time which temperature detection value is used as the first detected water temperature T w1 Or the second detected water temperature T w2 .

[0056] Before turning on the refrigeration, if the refrigeration control unit determines the first detected water temperature T in the cold tank in real time, w1 In the continuous first preset time s1, the temperature is greater than or equal to the first preset temperature T y1 , the compressor is started and the refrigeration operation begins; the first preset temperature T y1 It can be set according to actual needs, such as setting it to 10℃.

[0057] During the refrigeration process, the control unit determines the second detected water temperature T in the cold tank in real time. w2 ;

[0058] And determine the second detected water temperature T w2 In the continuous second preset time s2, whether the temperature is less than or equal to the second preset temperature T y2 If so, the compressor is turned off and the refrigeration operation is stopped; the second preset temperature T y2 It can also be set according to actual needs, such as setting it to 5℃.

[0059] The refrigeration control method designed in this embodiment is to centrally set two temperature sensors in a certain area in the cold tank of the water purifier. The control unit determines in real time which of the two temperature sensors has a more reliable detected temperature value, and uses the detected temperature value and the set first preset temperature T y1 , the second preset temperature T y2 By making comparisons, the start and stop timing of the compressor can be determined. Even if the temperature sensor is open-circuited, short-circuited, or has resistance drift, which causes a deviation between the temperature detected by the sensor and the actual temperature, this can be avoided through the designed selection mechanism, so that the entire machine's refrigeration operation will not fail due to sensor failure or inaccurate sensor detection accuracy.

[0060] It is worth noting that, under the refrigeration mechanism of the present invention, the first detected water temperature T w1 , Second detection water temperature T w2 It is not limited to the comprehensive evaluation of the temperature detection values ​​transmitted by the two temperature sensors set in the cold tank. It is also possible to set more than two temperature sensors. Considering the complexity of the control program and the implementation cost, it is more appropriate to set two temperature sensors. At the same time, those skilled in the art should be able to understand that the refrigeration control method of the present invention is not limited to water purifier equipment, but is also applicable to other equipment with refrigeration function such as refrigerators.

[0061] Example 2

[0062] See also Figure 3 - Figure 5 A refrigeration control method of this embodiment further sets:

[0063] If the control unit determines that the first detection temperature T1 and the second detection temperature T2 are both greater than or equal to the third preset temperature T y3 , and is less than or equal to the fourth preset temperature T y4 ;

[0064] The control unit continues to compare the first detected temperature T1 with the second detected temperature T2, and takes the smaller detected temperature value as the first detected water temperature T w1 Or the second detected water temperature T w2 .

[0065] If the control unit determines that one of the first detection temperature T1 and the second detection temperature T2 is greater than or equal to the third preset temperature T y3 , and is less than or equal to the fourth preset temperature T y4 ;

[0066] The control unit then uses the detected temperature value that meets the above conditions as the first detected water temperature T w1 Or the second detected water temperature T w2 .

[0067] If the control unit determines that the first detection temperature T1 and the second detection temperature T2 are both lower than the third preset temperature T y3 , or greater than the fourth preset temperature T y4 ;

[0068] The control unit then reports a fault and alerts the user.

[0069] The third preset temperature T y3 , the fourth preset temperature T y4 Set according to actual conditions, such as the third preset temperature T y3 Set to -10℃, the fourth preset temperature T y4 Set to 50°C. In this embodiment, the third preset temperature T y3 , the fourth preset temperature T y4 To determine whether the temperature sensor is open circuit, short circuit or has a large resistance deviation. When the detection values ​​of the two temperature sensors are both above the third preset temperature T y3 , the fourth preset temperature T y4 The refrigeration is turned on only when the temperature detection values ​​of the two temperature sensors reach the first preset temperature. The refrigeration is turned off when the temperature detection value of one temperature sensor is lower than the second preset temperature.

[0070] By using the refrigeration mechanism of the present invention, when a temperature sensor resistance drift occurs and the drift temperature is greater than the first preset temperature, the water purifier operates due to the temperature sensor with a lower reference temperature detection value. When the temperature value of the low-temperature temperature sensor reaches the set first preset temperature, the refrigeration is turned on, and when it reaches the set second preset temperature, the refrigeration is turned off. At this time, the normal operation of the water purifier can also be guaranteed.

[0071] When a temperature sensor resistance drifts and the drift temperature is less than the first preset temperature, one of the temperature sensors cannot reach the first preset temperature, the water purifier will not start cooling, and the water purifier will operate at room temperature, and there will be no safety risks. It can be seen that the refrigeration mechanism of the present invention avoids the situation where the program has no determined reference point due to the resistance and temperature deviation of the two temperature sensors.

[0072] Example 3

[0073] Combination Figure 6 , this embodiment further sets the following cooling rules:

[0074] During the cooling process, if the control unit determines that the first detection temperature T1 and the second detection temperature T2 are both greater than or equal to the first preset temperature T y1 , and is less than or equal to the fourth preset temperature T y4, but the compressor running time has exceeded the third preset time s3, the control unit shuts down the compressor, stops the refrigeration operation, and reports a fault to remind the user. The third preset time s3 is the compressor refrigeration time under normal circumstances plus a single maximum refrigeration time set by the margin. This embodiment determines whether the single maximum refrigeration time has been exceeded by detecting the compressor running time. If exceeded, the compressor is immediately shut down and refrigeration is stopped. This can ensure that the water purifier will not have serious problems and safety risks.

[0075] Example 4

[0076] Combination Figure 7 , this embodiment further sets the following cooling rules:

[0077] The control unit determines that the first detection temperature T1 and the second detection temperature T2 are both lower than the first preset temperature T y1 , and is greater than or equal to the third preset temperature T y3 , the control unit does not start the compressor cooling.

[0078] In this way, when the temperatures of the two temperature sensors are both below the first preset temperature and within the normal detection range, the water purifier will not start cooling and will not cause any safety risks. At the same time, if the user has an obvious feeling that the water purifier is not cooling when using it, he or she can contact after-sales service for maintenance.

[0079] Example 5

[0080] Combination Figure 8 , this embodiment further sets the following cooling rules:

[0081] After the compressor stops running and ends the refrigeration process, the control unit records the compressor stop time. If it is determined that the compressor stop time exceeds the fourth preset time s4, and one of the first detection temperature T1 and the second detection temperature T2 is less than the first preset temperature T y1 , and is greater than or equal to the third preset temperature T y3 ; then the control unit regards the temperature sensor whose detected temperature value meets the said condition as an abnormal sensor and shields it.

[0082] This is an identification mechanism for identifying temperature sensor resistance drift and less than the refrigeration temperature. In two refrigeration cycles, the compressor stop time can usually be understood as the cold tank refrigeration insulation time. The fourth preset time s4 is an abnormal insulation time set. Usually, the compressor stop time (i.e., normal insulation time) in two refrigeration cycles will be shorter than the fourth preset time s4. If the compressor stop time has exceeded the fourth preset time s4, but there is still a temperature sensor detection temperature value lower than the first preset temperature T y1(The probability of two temperature sensors having resistance drift at the same time is low), then the temperature sensor is most likely an abnormal temperature sensor. The control unit can be set to shield the temperature sensor in the program setting, and only refer to the other temperature sensor in the future to ensure the normal operation of the water purifier.

[0083] Example 6

[0084] Combination Fig. 9 In order to ensure that the water purifier has a better cooling effect, this embodiment further formulates an operation strategy of the circulation pump. The scientific operation of the circulation pump can promote the heat transfer of water in different areas of the cold tank, accelerate the overall cooling speed of the water in the cold tank, improve the cooling efficiency, and further avoid the occurrence of freezing.

[0085] During the refrigeration process, the control unit detects the second water temperature T in the cold tank. w2 ; Second detection water temperature T w2 The control unit also makes a comprehensive assessment of the temperature detection values ​​transmitted by the two temperature sensors installed in the cold tank.

[0086] Determine the second detected water temperature T w2 Less than or equal to the fifth preset temperature T y5 When the circulating pump is turned on, the water in the cold tank circulates; the fifth preset temperature T y5 Set according to actual needs, such as setting it to 14℃.

[0087] The second test water temperature T w2 Less than or equal to the fifth preset temperature T y5 , and is greater than the sixth preset temperature T y6 In the interval, the circulation pump is kept on for the fifth preset time s5 and stopped for the sixth preset time s6, and the sixth preset time s6 is 2-3 times of the fifth preset time s5; the sixth preset temperature T y6 The fifth preset time s5 and the sixth preset time s6 are set according to actual needs, such as being set to 10°C, 1 minute and 3 minutes.

[0088] The second test water temperature T w2 Less than or equal to the sixth preset temperature T y6 , and is greater than the seventh preset temperature T y7 In the interval, the circulation pump is kept on for the seventh preset time s7 and stopped for the eighth preset time s8, and the seventh preset time s7 is 1-2 times of the eighth preset time s8; the seventh preset temperature T y7 The seventh preset time s7 and the eighth preset time s8 are set according to actual needs, such as being set to 6°C, 2 minutes and 1 minute.

[0089] The second water temperature T w2Less than or equal to the seventh preset temperature T y7 , and is greater than the second preset temperature T y2 In the interval, the circulating pump remains turned on and continues to work for a ninth preset time s9 after the compressor stops. The ninth preset time s9 is set according to actual needs, such as being set to 1 minute.

[0090] Example 7

[0091] A water purifier of the present invention has a refrigeration control unit comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the refrigeration control method described in Examples 1 to 6 when executed by the processor.

[0092] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A refrigeration control method, characterized in that: The refrigeration control unit determines whether the first detected water temperature in the cold tank is greater than or equal to the first preset temperature within a continuous first preset time, and if so, starts the compressor to enter refrigeration operation; During the refrigeration process, the control unit determines the second detected water temperature in the cold tank in real time; and determining whether the second detected water temperature is less than or equal to the second preset temperature within a continuous second preset time, and if so, shutting down the compressor and stopping the refrigeration operation; The first detected water temperature and the second detected water temperature are determined by the control unit through comprehensive evaluation of temperature detection values ​​transmitted by at least two temperature sensors arranged in the cold tank.

2. A refrigeration control method according to claim 1, characterized in that: The refrigeration control unit receives the first detection temperature transmitted by the first temperature sensor and the second detection temperature transmitted by the second temperature sensor respectively, and comprehensively evaluates the first detection temperature and the second detection temperature to determine the first detection water temperature or the second detection water temperature; the first temperature sensor and the second temperature sensor are arranged in the cold tank, and the straight-line distance between the first temperature sensor and the second temperature sensor is less than 1 cm.

3. A refrigeration control method according to claim 2, characterized in that: If the control unit determines that the first detection temperature and the second detection temperature are both greater than or equal to the third preset temperature and less than or equal to the fourth preset temperature; The control unit then continues to compare the first detected temperature with the second detected temperature, and uses the smaller detected temperature value as the first detected water temperature or the second detected water temperature.

4. A refrigeration control method according to claim 2, characterized in that: If the control unit determines that one of the first detection temperature and the second detection temperature is greater than or equal to the third preset temperature and less than or equal to the fourth preset temperature; The control unit then uses the detected temperature value that meets the above conditions as the first detected water temperature or the second detected water temperature.

5. A refrigeration control method according to claim 2, characterized in that: If the control unit determines that the first detection temperature and the second detection temperature are both lower than the third preset temperature, or higher than the fourth preset temperature; The control unit then reports a fault and alerts the user.

6. A refrigeration control method according to any one of claims 3 to 5, characterized in that: During the refrigeration process, if the control unit determines that the first detection temperature and the second detection temperature are both greater than or equal to the first preset temperature and less than or equal to the fourth preset temperature, but the compressor running time has exceeded the third preset time, the control unit turns off the compressor, stops the refrigeration operation, and reports a fault to alert the user.

7. A refrigeration control method according to any one of claims 3 to 5, characterized in that: The control unit determines that the first detection temperature and the second detection temperature are both lower than the first preset temperature and greater than or equal to the third preset temperature, and the control unit does not start the compressor for cooling.

8. A refrigeration control method according to any one of claims 3 to 5, characterized in that: After the compressor stops running and ends the refrigeration process, the control unit records the compressor stop time. If it is determined that the compressor stop time exceeds the fourth preset time, and one of the first detection temperature and the second detection temperature is lower than the first preset temperature and greater than or equal to the third preset temperature; the control unit regards the temperature sensor whose detection temperature value meets the said conditions as an abnormal sensor and shields it.

9. A refrigeration control method according to any one of claims 1 to 5, characterized in that: During the refrigeration process, the control unit detects the water temperature in the cold tank according to the second temperature; When it is determined that the second detected water temperature is less than or equal to the fifth preset temperature, the circulation pump is turned on to circulate the water in the cold tank; If the second detected water temperature is less than or equal to the fifth preset temperature and greater than the sixth preset temperature, the circulating pump is kept turned on for the fifth preset time and stopped for the sixth preset time, and the sixth preset time is 2-3 times of the fifth preset time; If the second detected water temperature is less than or equal to the sixth preset temperature and greater than the seventh preset temperature, the circulation pump remains turned on for the seventh preset time and stops for the eighth preset time, and the seventh preset time is 1-2 times of the eighth preset time; When the second detected water temperature is less than or equal to the seventh preset temperature and greater than the second preset temperature range, the circulating pump remains turned on and continues to work for a ninth preset time after the compressor stops.

10. A water purifier, characterized in that: The refrigeration control unit of the water purifier includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the refrigeration control method according to any one of claims 1 to 9 when executed by the processor.

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