Anti-freezing method and device and related equipment

Abstract

The invention relates to an anti-freezing method, device and related equipment, and relates to the technical field of antifreezing, according to the method, device and related equipment, during anti-freezing protection, logic judgment of detection system parameters is added, and the temperature of an inner pipe of a current evaporator and the temperature of an inner pipe of a first evaporator are judged; the real operation state of the equipment is judged by distinguishing different conditions, so that an anti-freezing protection program is triggered, and the problem that an evaporator is frozen and cannot be melted is avoided; meanwhile, a logic judgment formula is set through system parameter changes, so that the situation that the evaporator is frozen due to the difference, which cannot be recognized by naked eyes, of liquid separation assembly welding or liquid separation head part abnormity of the evaporator of the air conditioner is reduced, the after-sales complaint rate is greatly reduced, and reliable and normal operation of the air conditioner is ensured; and the compressor reliability life is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of antifreeze technology, and in particular to an antifreeze method, device and related equipment. Background Art

[0002] Currently, many processes in the manufacturing industry rely on manual production and testing of instruments and equipment, especially in the physical manufacturing industry. For example, large household appliances such as air conditioners, refrigerators, and washing machines are commonly used and indispensable in the home. Manual production is bound to have differences in individual components and component assembly. The accumulation of these differences may cause the entire machine to fail to meet the design requirements under certain operating conditions. However, manual inspection and control may be difficult to identify, so that abnormal problems may occur in actual use, resulting in after-sales complaints; for example, household air conditioner models, the indoor and outdoor units are combined to achieve the appropriate cooling and heating temperatures required by users. The indoor evaporator and outdoor condenser heat exchange equipment of the air conditioner are all assembled manually. If there are differences, they will not meet the design requirements, which is easy to cause after-sales feedback, especially for indoor units. For example, the existing air conditioner evaporator has uneven evaporator diversion due to deviations in the welding of the evaporator liquid separation components or abnormal parts of the liquid separation head, which causes the system refrigerant to flow unevenly, causing some flow paths of the evaporator to overheat. If the inner pipe temperature is in the flow path with biased overheating, the inner pipe temperature is always difficult to reach the anti-freezing protection condition, while the evaporator frosts due to the strong cooling effect of other flow paths. If the evaporator ice does not melt after running for too long, the problem of ice not melting on the evaporator will occur. The problem of evaporator frosting not melting has become a major problem that customers are concerned about. It needs to be forced to shut down to slowly defrost, and if the water is not drained in time after defrosting, the indoor unit will leak, giving people a very bad user experience.

[0003] In order to prevent freezing, the related art usually controls the refrigeration operation to enter shutdown protection when the evaporator is frosted by detecting whether the inner tube temperature reaches the preset anti-freeze protection temperature. However, due to the differences in actual production and use of equipment, the inner tube temperature detection cannot fully reflect the actual operating status of each flow path of the evaporator, resulting in poor anti-freeze effect of anti-freeze protection.

[0004] Therefore, how to improve the accuracy and antifreeze effect of antifreeze protection has become a technical problem to be solved urgently in the prior art.

[0005] Usually, the problem of evaporator icing is determined by detecting the outlet air temperature and the inlet air speed. However, this method mainly relies on increasing the speed of the internal fan to alleviate the evaporator icing problem when icing occurs. The sudden increase in air volume causes great discomfort to the human body. Moreover, the antifreeze effect of this antifreeze method is poor. Summary of the invention

[0006] In view of this, an object of the present invention is to provide an antifreeze method, device and related equipment to overcome the problem that the current antifreeze protection has a poor antifreeze effect.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions:

[0008] In one aspect, a method for preventing freezing includes:

[0009] After the target device runs for a first preset time, the first operating parameter and the first state parameter of the target device are obtained; wherein the first state parameter includes the first evaporator inner tube temperature and the first condenser outer tube temperature;

[0010] When the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature, the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference is judged, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device; wherein the first heat exchange temperature difference is the difference between the first condenser outer tube temperature and the first evaporator inner tube temperature; the current heat exchange temperature difference is the difference between the current condenser outer tube temperature and the current evaporator inner tube temperature;

[0011] When the current evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, it is determined whether the current operating parameter is the same as the first operating parameter, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device.

[0012] Optionally, judging the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference, determining the operating state of the target device according to the judging result, and triggering the anti-freezing protection program according to the operating state of the target device, includes:

[0013] If the current heat exchange temperature difference is less than or equal to the first heat exchange temperature difference, the operating state of the target device is determined by the relationship between the current condenser outer tube temperature and the first condenser outer tube temperature; or, the operating state of the target device is determined by the relationship between the current compressor exhaust temperature and the first compressor exhaust temperature.

[0014] Optionally, determining the operating state of the target device by the magnitude relationship between the current condenser outer tube temperature and the first condenser outer tube temperature; or determining the operating state of the target device by the magnitude relationship between the current compressor exhaust temperature and the first compressor exhaust temperature includes:

[0015] If the current condenser outer tube temperature is lower than the first condenser outer tube temperature, or the current compressor exhaust temperature is lower than the first compressor exhaust temperature, then when the evaporator inner tube temperature after the second preset time is higher than the evaporator inner tube temperature before the second preset time, it is determined that the operating state of the target device is abnormal, triggering the anti-freeze protection program.

[0016] Optionally, also include:

[0017] When the evaporator inner tube temperature after the second preset time is less than or equal to the evaporator inner tube temperature before the second preset time, the internal fan speed is increased and the operating frequency is reduced. After running for the third preset time, the current evaporator inner tube temperature is updated. If the updated current second evaporator inner tube temperature is greater than the first evaporator inner tube temperature, the anti-freeze protection program is triggered.

[0018] Optionally, also include:

[0019] If the updated current second evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, determine whether the condenser outer tube temperature or the compressor exhaust temperature is the same as the evaporator inner tube temperature change trend. If any trend is different, it triggers the anti-freeze protection program.

[0020] Optionally, increasing the rotation speed of the internal fan includes: increasing the rotation speed of the internal fan based on one gear as a standard.

[0021] Optionally, it also includes: if the current heat exchange temperature difference is greater than the first heat exchange temperature difference, maintaining the current operation.

[0022] Optionally, judging whether the current operating parameter is the same as the first operating parameter, determining the operating state of the target device according to the judging result, and triggering the anti-freezing protection program according to the operating state of the target device includes:

[0023] If any one of the current operating parameters is different from the first operating parameter, the temperature of the inner tube of the evaporator after the fourth preset running time is obtained, and the difference between the temperature of the inner tube of the evaporator after the fourth preset running time and the temperature of the inner tube of the evaporator after the fourth preset running time is determined, and the anti-freeze protection program is triggered according to the determination result.

[0024] Optionally, the determining of the difference between the temperature of the inner tube of the evaporator after the fourth preset time and the temperature of the inner tube of the evaporator after the fourth preset time, and triggering the anti-freezing protection program according to the determination result, includes:

[0025] If the temperature of the inner tube of the evaporator after the fourth preset time period is greater than the temperature of the inner tube of the evaporator after the fourth preset time period, the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference is judged again, and the operating status of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating status of the target device.

[0026] In yet another aspect, an antifreeze device comprises:

[0027] An acquisition module, used to acquire a first operating parameter and a first state parameter of the target device after the target device runs for a first preset time; wherein the first state parameter includes a first evaporator inner tube temperature and a first condenser outer tube temperature;

[0028] A processing module, used for judging the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference when the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature, and determining the operation state of the target device according to the judgment result, and triggering the anti-freeze protection program according to the operation state of the target device; wherein the first heat exchange temperature difference is the difference between the first condenser outer tube temperature and the first evaporator inner tube temperature; and the current heat exchange temperature difference is the difference between the current condenser outer tube temperature and the current evaporator inner tube temperature;

[0029] When the current evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, it is determined whether the current operating parameter is the same as the first operating parameter, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device.

[0030] In another aspect, an anti-freezing device includes a processor and a memory, wherein the processor is connected to the memory:

[0031] Wherein, the processor is used to call and execute the program stored in the memory;

[0032] The memory is used to store the program, and the program is at least used to execute any one of the anti-freezing methods described above.

[0033] In yet another aspect, a temperature control device comprises the above anti-freezing device.

[0034] Optionally, the temperature control device includes an air conditioner.

[0035] The technical solution provided by the embodiment of the present invention has at least the following beneficial effects:

[0036] When performing anti-freeze protection, a logical judgment of the detection system parameters is added. By judging the current evaporator inner tube temperature and the first evaporator inner tube temperature, different situations are distinguished to judge the actual operating status of the equipment, thereby triggering the anti-freeze protection program to avoid the problem of the evaporator freezing. At the same time, by setting the logical judgment formula through system parameter changes, the occurrence of evaporator dead ice caused by the welding of the evaporator dispensing component or the abnormal parts of the dispensing head of the air conditioner evaporator, which cannot be identified by the naked eye, is reduced. The rate of after-sales complaints is greatly reduced, and the reliable and normal operation of the air conditioner is ensured, and the reliability and life of the compressor are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic flow chart of an anti-freezing method provided by one embodiment of the present invention;

[0039] Figure 2 It is a flow chart of another anti-freezing method provided by an embodiment of the present invention;

[0040] Figure 3 is a structural schematic diagram of another anti-freezing device provided by an embodiment of the present invention;

[0041] Figure 4 It is a structural schematic diagram of another anti-freezing device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0043] As described in the background technology, the existing air conditioner evaporator has uneven evaporator diversion due to deviations in the welding of the evaporator liquid separation components or abnormalities in the liquid separation head parts, which causes the system refrigerant to flow in a biased manner, causing uneven evaporator diversion, and overheating of the evaporator in some flow paths. If the inner tube temperature is in the flow path with biased flow and overheating, it is difficult for the inner tube temperature to reach the anti-freeze protection condition, while the refrigeration of other flow paths is strong, resulting in evaporator frost. If the evaporator is running for too long, the ice will not melt. The problem of evaporator frost not melting has become a major problem for customers. It needs to be forced to shut down to slowly defrost. If the water is not drained in time after defrosting, the internal unit will leak, giving people a very bad user experience.

[0044] In order to prevent freezing, the related art usually controls the refrigeration operation to enter shutdown protection when the evaporator is frosted by detecting whether the inner tube temperature reaches the preset anti-freeze protection temperature. However, due to the differences in actual production and use of equipment, the inner tube temperature detection cannot fully reflect the actual operating status of each flow path of the evaporator, resulting in poor anti-freeze effect of anti-freeze protection.

[0045] Based on this, the embodiments of the present invention provide an anti-freezing method, device and related equipment. When performing anti-freezing protection, a logical judgment of the detection system parameters is added. By judging the current temperature of the inner tube of the evaporator and the temperature of the inner tube of the first evaporator, different situations are distinguished to judge the actual operating status of the equipment, thereby triggering the anti-freezing protection program to avoid the problem of the evaporator freezing and not melting. At the same time, by setting a logical judgment formula through system parameter changes, the occurrence of evaporator dead ice caused by differences that cannot be identified by the naked eye such as welding of the evaporator liquid dispensing component or abnormal parts of the liquid dispensing head of the air conditioner evaporator is reduced, thereby greatly reducing the after-sales complaint rate, ensuring the reliable and normal operation of the air conditioner, and improving the reliability and life of the compressor.

[0046] Figure 1 is a flowchart of an anti-freezing method provided by an embodiment of the present invention, please refer to Figure 1 , this embodiment may include the following steps:

[0047] Step S11, obtaining a first operating parameter and a first state parameter of the target device after the target device has been running for a first preset time.

[0048] The target device may be any device with a temperature control function, for example, the target device may be an air conditioner. After the air conditioner is turned on for cooling, the operating parameters are detected: frequency f, internal fan speed pr 内 , external fan speed pr 外 ; State parameters: evaporator internal tube temperature Tn, condenser external tube temperature Tw, compressor exhaust temperature Tp.

[0049] The first operating parameters include a first operating frequency f1, a first internal fan speed pr 内1 , the first external fan speed pr 外1 The first state parameters include the first evaporator inner tube temperature Tn1, the first condenser outer tube temperature Tw1, and the first compressor exhaust temperature Tp1.

[0050] For example, in this embodiment, the first preset time can be set to 15 minutes. Of course, other time can be set according to the needs. When the air conditioner is turned on for cooling, it generally reaches a stable state in 15 minutes. At this time, the state parameters of the air conditioning system are relatively constant. In non-abnormal situations, the change trend of the system state parameters should be consistent. The operating parameters and state parameters at this time are detected and recorded as f1, pr 内1 ,pr 外1 , Tn1, Tw1, Tp1, and calculate the heat exchange temperature difference △T=Tw1-Tn1 as a constant value. By comparing the subsequent operating parameters of the air conditioner with the parameters recorded in 15 minutes, it is determined whether the air conditioner is in a normal state.

[0051] Step S12, when the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature Tn1, judge the size of the current heat exchange temperature difference and the first heat exchange temperature difference, and determine the operating state of the air conditioner according to the judgment result, and trigger the anti-freeze protection program according to the operating state of the air conditioner; wherein, the first heat exchange temperature difference is the difference between the first condenser outer tube temperature Tw1 and the first evaporator inner tube temperature Tn1; the current heat exchange temperature difference is the difference between the current condenser outer tube temperature Tw and the current evaporator inner tube temperature Tn.

[0052] When Tn>Tn1, it means that after reaching a relatively stable state, the inner pipe temperature still rises, which is inconsistent with the theory. Analysis shows that there is a possibility of bias flow. The operating status of the air conditioner is determined by judging the size of Tw-Tn and △T, and the freezing protection program is triggered according to the operating status.

[0053] Step S13: when the current evaporator inner tube temperature Tn is less than or equal to the first evaporator inner tube temperature Tn1, determine whether the current operating parameter is the same as the first operating parameter, determine the operating state of the air conditioner according to the determination result, and trigger the anti-freeze protection program according to the operating state of the air conditioner.

[0054] When Tn≤Tn1, it means that the inner pipe temperature is continuously decreasing. At this time, verify the operating parameter frequency f, inner fan speed prinside, outer fan speed proutside parameters and the size of the parameters recorded at 15 minutes to see whether the decrease in inner pipe temperature is caused by the change of this parameter, and trigger the anti-freeze protection program according to the judgment result.

[0055] It can be understood that the technical solution provided in the embodiment of the present invention adds a logical judgment of the detection system parameters when performing anti-freeze protection. By judging the current temperature of the inner tube of the evaporator and the temperature of the inner tube of the first evaporator, different situations are distinguished to judge the actual operating status of the equipment, thereby triggering the anti-freeze protection program to avoid the problem of the evaporator freezing and not melting. At the same time, by setting the logical judgment formula through the change of system parameters, the occurrence of evaporator dead ice caused by the welding of the evaporator liquid dispensing component or the abnormal parts of the liquid dispensing head of the air-conditioning evaporator, which cannot be identified by the naked eye, is reduced, thereby greatly reducing the after-sales complaint rate, ensuring the reliable and normal operation of the air conditioner, and improving the reliability and life of the compressor.

[0056] Figure 2 It is a schematic diagram of a judgment flow of another anti-freezing method provided by an embodiment of the present invention.

[0057] See also Figure 2It can be seen that in an embodiment of the present invention, after obtaining the first preset operation time of the target device, the first operation parameter and the first state parameter of the target device, when the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature Tn1, in some embodiments, it also includes: if the current heat exchange temperature difference is greater than the first heat exchange temperature difference, maintain the current operation.

[0058] Tw-Tn>△T, which means that although the internal pipe temperature has increased, it is an increase in the overall parameters of the air-conditioning system, and there is no sudden change. The trend of system parameter changes is consistent, and the current operation is maintained.

[0059] In some embodiments, the determining of the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference, and determining the operating state of the air conditioner according to the determination result, and triggering the anti-freeze protection program according to the operating state of the air conditioner include:

[0060] If the current heat exchange temperature difference is less than or equal to the first heat exchange temperature difference, the operating state of the air conditioner is determined by the relationship between the current condenser outer tube temperature and the first condenser outer tube temperature; or, the operating state of the air conditioner is determined by the relationship between the current compressor exhaust temperature and the first compressor exhaust temperature.

[0061] When Tw-Tn≤△T, it means that the inner tube temperature rises, and the outer tube temperature changes inconsistently with the inner tube temperature. There is a hidden danger of system refrigerant deviation that may cause this phenomenon. Then continue to judge the size of Tw and Tw1, Tp and Tp1, and make status judgment through Tw and Tw1, or Tp and Tp1.

[0062] In some embodiments, determining the operating state of the air conditioner by the magnitude relationship between the current condenser outer tube temperature and the first condenser outer tube temperature; or determining the operating state of the air conditioner by the magnitude relationship between the current compressor exhaust temperature and the first compressor exhaust temperature includes:

[0063] If the current condenser outer tube temperature is lower than the first condenser outer tube temperature, or the current compressor exhaust temperature is lower than the first compressor exhaust temperature, then when the evaporator inner tube temperature after the second preset time is higher than the evaporator inner tube temperature before the second preset time, it is determined that the air conditioner operating state is abnormal, triggering the anti-freeze protection program.

[0064] If Tw≥Tw1 or Tp≥Tp1, it means that due to the differences in different air-conditioning systems, the 15-minute recorded data has not reached a relative steady state. While the inner pipe temperature rises, the exhaust and outer pipe temperatures also rise synchronously. The change trends of the system state parameters are the same, and the air conditioner can continue to operate as it is.

[0065] If Tw<Tw1 or Tp<Tp1, it means that the inner tube temperature is rising, while the outer tube temperature and exhaust temperature are decreasing. The change trend of the system state parameters is inconsistent. Continue to judge whether the inner tube temperature is still rising. If it is rising, it is judged that the refrigeration operation is abnormal. The temperature of the non-inner tube temperature area of ​​the evaporator is much lower than that of the inner tube temperature position, which affects the exhaust temperature of the whole machine and the lower outer tube temperature. This is caused by the bias flow or uneven diversion of the evaporator of the internal machine. It is necessary to enter the anti-freeze protection shutdown in time to avoid thick frost or even ice in the evaporator in the non-inner tube temperature area. Among them, the second preset time length can be 1 minute, 2 minutes, 3 minutes, etc., which is used to judge the change trend.

[0066] In some embodiments, it also includes:

[0067] When the evaporator inner tube temperature after the second preset time is less than or equal to the evaporator inner tube temperature before the second preset time, the internal fan speed is increased and the operating frequency is reduced. After running for the third preset time, the current evaporator inner tube temperature is updated. If the updated current second evaporator inner tube temperature is greater than the first evaporator inner tube temperature, the anti-freeze protection program is triggered.

[0068] In some embodiments, increasing the rotation speed of the internal fan includes: increasing the rotation speed of the internal fan based on one gear as a standard.

[0069] If the inner tube temperature does not continue to rise, the inner tube temperature detection temperature may be biased, which can be verified by increasing the inner fan speed (one gear) and reducing the operating frequency, running for a third preset time (for example, 3 minutes), and then judging the inner tube temperature Tn at this time and the inner tube temperature Tn1 recorded at 15 minutes, so as to trigger the anti-freeze protection program according to the comparison result. If Tn>Tn1, it means that slowing down the refrigeration effect can no longer solve the evaporator frosting situation, and it is necessary to enter the anti-freeze shutdown protection in time.

[0070] In some embodiments, it also includes:

[0071] If the updated current second evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, determine whether the condenser outer tube temperature or the compressor exhaust temperature is the same as the evaporator inner tube temperature change trend. If any trend is different, it triggers the anti-freeze protection program.

[0072] If Tn≤Tn1, it means that the evaporator bias can be alleviated, and then judge the size of Tw and Tw1, Tp and Tp1 to see whether they are the same as the changing trend of the inner pipe temperature. If the changing trend is the same, it means that the evaporator refrigerant bias has been alleviated by adjusting the operating parameters, and you can continue to operate according to this parameter to ensure the cooling demand. If the changing trend of the outer pipe temperature or exhaust gas is different from the inner pipe temperature, it means that adjusting the operating parameters can no longer alleviate the bias. Continuing to operate will only aggravate the evaporator bias and frosting. It is necessary to enter the anti-freeze protection in time to ensure the normal operation of the air conditioner.

[0073] In some embodiments, the determining whether the current operating parameter is the same as the first operating parameter, determining the operating state of the air conditioner according to the determination result, and triggering the anti-freeze protection program according to the operating state of the air conditioner includes:

[0074] If any one of the current operating parameters is different from the first operating parameter, the temperature of the inner tube of the evaporator after the fourth preset running time is obtained, and the difference between the temperature of the inner tube of the evaporator after the fourth preset running time and the temperature of the inner tube of the evaporator after the fourth preset running time is determined, and the anti-freeze protection program is triggered according to the determination result.

[0075] In some embodiments, the determining of the difference between the temperature of the inner tube of the evaporator after the fourth preset time and the temperature of the inner tube of the evaporator after the fourth preset time, and triggering the anti-freeze protection program according to the determination result, includes:

[0076] If the temperature of the inner tube of the evaporator after the fourth preset time is greater than the temperature of the inner tube of the evaporator after the fourth preset time, the current heat exchange temperature difference and the first heat exchange temperature difference are judged again, and the operating status of the air conditioner is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating status of the air conditioner.

[0077] When Tn≤Tn1, it means that the internal pipe temperature is continuously decreasing. At this time, verify the operating parameters frequency f and internal fan speed pr 内 , external fan speed pr 外 Record the size of the parameter at 15 minutes to see whether the decrease in inner tube temperature is caused by the change of this parameter.

[0078] If f、pr 内 ,pr 外 With f1, pr 内1 ,pr 外1 The same indicates that the change in non-operating parameters causes the change in the internal pipe temperature. The 15-minute recorded data may be a non-stable state parameter. It is in normal cooling state and operates as it is.

[0079] If f、pr 内 ,pr 外 With f1, pr 内1 ,pr外1 If any of the data is different, it means that the change of the internal pipe temperature is affected by the change of the actual operating parameters and is inconsistent with the stable setting parameters, so reassign f=f1, pr 内 =pr 内1 pr=pr 外1 , after re-running for the fourth preset time (for example, 3 minutes), re-detect the size of Tn and Tn1 to determine whether Tn≤Tn1 is established. If established, it means that it is not affected by the operating parameters., Same as the above phenomenon, the refrigeration is in normal state and operates normally. If not established, it means that it is affected by the operating parameters. According to the above method, continue to monitor the size of the temperature difference between the outer pipe temperature and the inner pipe temperature to determine whether the air conditioner is abnormal, that is, re-circulate and execute to determine the size of the current heat exchange temperature difference and the first heat exchange temperature difference, and determine the operating state of the target device according to the judgment result, and trigger the anti-freeze protection program according to the operating state of the target device.

[0080] It can be understood that, by adopting the technical solution provided in this embodiment, when performing anti-freeze protection, a logical judgment of the detection system parameters is added. By judging the current temperature of the inner tube of the evaporator and the temperature of the inner tube of the first evaporator, different situations are distinguished to judge the actual operating status of the equipment, thereby triggering the anti-freeze protection program to avoid the problem of the evaporator freezing. At the same time, by setting the logical judgment formula through the change of system parameters, the occurrence of evaporator dead ice caused by the welding of the evaporator dispensing component or the abnormal parts of the dispensing head of the air conditioner evaporator, which cannot be identified by the naked eye, is reduced, thereby greatly reducing the after-sales complaint rate, ensuring the reliable and normal operation of the air conditioner, and improving the reliability and life of the compressor.

[0081] Based on a general inventive concept, the present invention also provides an anti-freezing device for implementing the above method embodiment.

[0082] Figure 3 is a schematic diagram of the structure of another anti-freezing device provided by an embodiment of the present invention, see Figure 3 , the device provided in this embodiment includes:

[0083] An acquisition module 31 is used to acquire a first operating parameter and a first state parameter of the target device after the target device runs for a first preset time; wherein the first state parameter includes a first evaporator inner tube temperature and a first condenser outer tube temperature;

[0084] The processing module 32 is used to judge the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference when the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature, and determine the operating state of the target device according to the judgment result, and trigger the anti-freeze protection program according to the operating state of the target device; wherein the first heat exchange temperature difference is the difference between the first condenser outer tube temperature and the first evaporator inner tube temperature; the current heat exchange temperature difference is the difference between the current condenser outer tube temperature and the current evaporator inner tube temperature;

[0085] When the current evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, it is determined whether the current operating parameter is the same as the first operating parameter, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device.

[0086] In some embodiments, the processing module is specifically used to determine the operating state of the target device by the relationship between the current condenser outer tube temperature and the first condenser outer tube temperature if the current heat exchange temperature difference is less than or equal to the first heat exchange temperature difference; or, determine the operating state of the target device by the relationship between the current compressor exhaust temperature and the first compressor exhaust temperature.

[0087] In some embodiments, the processing module is specifically used to determine that the operating state of the target device is abnormal and trigger entry into the anti-freeze protection program if the current condenser outer tube temperature is lower than the first condenser outer tube temperature, or the current compressor exhaust temperature is lower than the first compressor exhaust temperature, and the evaporator inner tube temperature after a second preset time period is higher than the evaporator inner tube temperature before the second preset time period.

[0088] In some embodiments, the processing module is also specifically used to increase the internal fan speed and reduce the operating frequency when the evaporator inner tube temperature after a second preset time is less than or equal to the evaporator inner tube temperature before the second preset time, and update the current evaporator inner tube temperature after running for a third preset time. If the updated current second evaporator inner tube temperature is greater than the first evaporator inner tube temperature, it triggers the anti-freeze protection program.

[0089] In some embodiments, the processing module is also used to determine whether the condenser outer tube temperature or the compressor exhaust temperature is the same as the evaporator inner tube temperature change trend if the updated current second evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature. If any of the trends is different, it triggers the anti-freeze protection program.

[0090] In some embodiments, the processing module is further configured to maintain the current operation if the current heat exchange temperature difference is greater than the first heat exchange temperature difference.

[0091] In some embodiments, the processing module is specifically used to obtain the temperature of the inner tube of the evaporator after the fourth preset time of operation if any one of the current operating parameters is different from the first operating parameter, and to judge the size of the temperature of the inner tube of the evaporator after the fourth preset time and the temperature of the inner tube of the evaporator after the fourth preset time, and trigger the anti-freeze protection program according to the judgment result.

[0092] In some embodiments, the processing module is specifically used to again determine the size of the current heat exchange temperature difference and the first heat exchange temperature difference if the temperature of the inner tube of the evaporator after a fourth preset time period is greater than the temperature of the inner tube of the evaporator after a fourth preset time period, and determine the operating status of the target device according to the judgment result, and trigger the anti-freeze protection program according to the operating status of the target device.

[0093] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0094] Based on a general inventive concept, an embodiment of the present invention further provides an anti-freezing device.

[0095] Figure 4 is a structural schematic diagram of another anti-freezing device provided by an embodiment of the present invention, see Figure 4 , the anti-freezing device provided by the embodiment of the present invention includes a processor connected to a memory:

[0096] The processor 41 is used to call and execute the program stored in the memory;

[0097] The memory 42 is used to store the program, and the program is at least used to execute any one of the above-mentioned anti-freezing methods.

[0098] The specific implementation scheme of the anti-freezing device provided in the embodiments of the present application can refer to the implementation scheme of the anti-freezing device method in any of the above embodiments, which will not be repeated here.

[0099] In an embodiment of the present invention, a temperature control device is also provided, comprising the above-mentioned anti-freezing device.

[0100] Optionally, the temperature control device includes an air conditioner.

[0101] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0102] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0103] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0104] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0105] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0106] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0107] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0108] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0109] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An antifreeze method, characterized in that: include: After the target device runs for a first preset time, the first operating parameter and the first state parameter of the target device are obtained; wherein the first state parameter includes the first evaporator inner tube temperature and the first condenser outer tube temperature; When the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature, the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference is judged, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device; wherein the first heat exchange temperature difference is the difference between the first condenser outer tube temperature and the first evaporator inner tube temperature; the current heat exchange temperature difference is the difference between the current condenser outer tube temperature and the current evaporator inner tube temperature; When the current evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, it is determined whether the current operating parameter is the same as the first operating parameter, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device.

2. The method according to claim 1, characterized in that The determining of the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference, and determining the operating state of the target device according to the determination result, and triggering the anti-freezing protection program according to the operating state of the target device, includes: If the current heat exchange temperature difference is less than or equal to the first heat exchange temperature difference, the operating state of the target device is determined by the relationship between the current condenser outer tube temperature and the first condenser outer tube temperature; or, the operating state of the target device is determined by the relationship between the current compressor exhaust temperature and the first compressor exhaust temperature.

3. The method according to claim 2, characterized in that The step of determining the operating state of the target device by the magnitude relationship between the current condenser outer tube temperature and the first condenser outer tube temperature; or determining the operating state of the target device by the magnitude relationship between the current compressor exhaust temperature and the first compressor exhaust temperature includes: If the current condenser outer tube temperature is lower than the first condenser outer tube temperature, or the current compressor exhaust temperature is lower than the first compressor exhaust temperature, then when the evaporator inner tube temperature after the second preset time is higher than the evaporator inner tube temperature before the second preset time, it is determined that the operating state of the target device is abnormal, triggering the anti-freeze protection program.

4. The method according to claim 3, characterized in that Also includes: When the evaporator inner tube temperature after the second preset time is less than or equal to the evaporator inner tube temperature before the second preset time, the internal fan speed is increased and the operating frequency is reduced. After running for the third preset time, the current evaporator inner tube temperature is updated. If the updated current second evaporator inner tube temperature is greater than the first evaporator inner tube temperature, the anti-freeze protection program is triggered.

5. The method according to claim 4, characterized in that Also includes: If the updated current second evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, determine whether the condenser outer tube temperature or the compressor exhaust temperature is the same as the evaporator inner tube temperature change trend. If any trend is different, it triggers the anti-freeze protection program.

6. The method according to claim 4, characterized in that Increasing the rotation speed of the internal fan includes: increasing the rotation speed of the internal fan based on one gear as a standard.

7. The method according to claim 1, characterized in that Also includes: If the current heat exchange temperature difference is greater than the first heat exchange temperature difference, the current operation is maintained.

8. The method according to claim 1, characterized in that The determining whether the current operating parameter is the same as the first operating parameter, determining the operating state of the target device according to the determination result, and triggering the anti-freezing protection program according to the operating state of the target device includes: If any one of the current operating parameters is different from the first operating parameter, the temperature of the inner tube of the evaporator after the fourth preset running time is obtained, and the difference between the temperature of the inner tube of the evaporator after the fourth preset running time and the temperature of the inner tube of the evaporator after the fourth preset running time is determined, and the anti-freeze protection program is triggered according to the determination result.

9. The method according to claim 8, characterized in that The determining of the difference between the temperature of the inner tube of the evaporator after the fourth preset time and the temperature of the inner tube of the evaporator after the fourth preset time, and triggering the anti-freezing protection program according to the determination result, includes: If the temperature of the inner tube of the evaporator after the fourth preset time period is greater than the temperature of the inner tube of the evaporator after the fourth preset time period, the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference is judged again, and the operating status of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating status of the target device.

10. An anti-freezing device, characterized in that: include: An acquisition module, used to acquire a first operating parameter and a first state parameter of the target device after the target device runs for a first preset time; wherein the first state parameter includes a first evaporator inner tube temperature and a first condenser outer tube temperature; A processing module, used for judging the magnitude of the current heat exchange temperature difference and the first heat exchange temperature difference when the current evaporator inner tube temperature Tn is greater than the first evaporator inner tube temperature, and determining the operation state of the target device according to the judgment result, and triggering the anti-freeze protection program according to the operation state of the target device; wherein the first heat exchange temperature difference is the difference between the first condenser outer tube temperature and the first evaporator inner tube temperature; and the current heat exchange temperature difference is the difference between the current condenser outer tube temperature and the current evaporator inner tube temperature; When the current evaporator inner tube temperature is less than or equal to the first evaporator inner tube temperature, it is determined whether the current operating parameter is the same as the first operating parameter, and the operating state of the target device is determined according to the judgment result, and the anti-freeze protection program is triggered according to the operating state of the target device.

11. An anti-freezing device, characterized in that: The invention comprises a processor and a memory, wherein the processor is connected to the memory: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store the program, and the program is at least used to execute the anti-freezing method according to any one of claims 1 to 9.

12. A temperature control device, characterized in that: Comprising the anti-freezing device as claimed in claim 11.

13. The temperature control device according to claim 12, characterized in that: The temperature control device includes an air conditioner.

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