Method, device, air conditioner and storage medium for preventing high-temperature decomposition of refrigerant

Abstract

The present application relates to the technical field of smart home appliances, and discloses a method for preventing high-temperature decomposition of refrigerant, comprising: obtaining a mapping relationship between the equipment parameters of an air conditioner and the maximum refrigerant temperature inside a compressor; obtaining the actual equipment parameters of the air conditioner during the operation of the compressor; and adjusting the operating parameters of the air conditioner according to the actual equipment parameters and the mapping relationship to prevent the maximum refrigerant temperature inside the compressor from reaching a temperature threshold. The actual condition of the refrigerant temperature inside the compressor can be determined according to the actual equipment parameters of the air conditioner, so that the operating parameters of the compressor can be adjusted in time to prevent the maximum refrigerant temperature inside the compressor from reaching the temperature threshold, causing the refrigerant to decompose due to heat. This process can be implemented during the normal operation of the air conditioner, without adding a stabilizer to the refrigerant, and will not affect the refrigeration performance of the air conditioner. The present application also discloses a device for preventing high-temperature decomposition of refrigerant, an air conditioner, and a storage medium.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, for example, to a method, device, air conditioner and storage medium for preventing refrigerant decomposition. Background Art

[0002] The refrigerant in the air conditioner is an important part of the air conditioner to achieve the control of the ambient temperature. With the continuous development of air conditioning technology, the types of refrigerants are constantly changing. People are constantly looking for environmentally friendly, efficient and energy-saving refrigerants for air conditioners. Among them, the ODP (ozone depletion potential) and GWP (Global Warming Potential) of R161 (fluoranylethane) refrigerant are much lower than those of R22 (chlorodifluoromethane, Freon-22) refrigerant. At the same time, its light haze corresponding value is much lower than that of hydrocarbon refrigerants, and its comprehensive environmental performance is better than that of R22 refrigerants and hydrocarbon refrigerants. In addition, compared with the R22 refrigeration system, the refrigerant charge can be reduced by about 45% and the mass flow rate can be reduced by about 30%. Therefore, R161 refrigerant can be used as a long-term alternative to R22 refrigerant and has good development prospects. However, the stability of R161 refrigerant is relatively weak. When adding conventional compressor lubricant, it will decompose at about 170℃; when in contact with common metals in refrigeration systems such as stainless steel or copper, it will decompose at 200℃. The decomposition of R161 will affect the quality of the compressor lubricant, thus affecting the accuracy of the compressor operation.

[0003] At present, the R161 refrigerant is often prevented from decomposing under heat by improving the R161 refrigerant additive. In the related art, a compressor refrigeration oil is provided, which makes the performance of the R161 refrigerant stable under high temperature environment by adding a stabilizer to maintain the stability of the refrigerant to the mineral oil, so that the compressor using the R161 refrigerant tends to operate stably and normally, thereby improving the reliability of such compressors.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Although the addition of stabilizers can improve the stability of the air conditioner compressor operation, the addition of stabilizers will affect the refrigeration performance of the air conditioner to a certain extent.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the scope of protection of these embodiments. Instead, it serves as a preamble to the detailed description that follows.

[0008] Embodiments of the present disclosure provide a method, a device, an air conditioner, and a storage medium for preventing high-temperature decomposition of a refrigerant, so as to avoid high-temperature decomposition of the refrigerant without affecting the refrigeration performance of the air conditioner, thereby improving the stability of the compressor operation.

[0009] In some embodiments, the method includes: obtaining a mapping relationship between the device parameters of the air conditioner and the highest refrigerant temperature inside the compressor; during the operation of the compressor, obtaining the actual device parameters of the air conditioner; and adjusting the operation parameters of the air conditioner according to the actual device parameters and the mapping relationship to prevent the highest refrigerant temperature inside the compressor from reaching a temperature threshold.

[0010] Optionally, obtaining the mapping relationship between the device parameters of the air conditioner and the highest refrigerant temperature inside the compressor includes: simulating the operation of the compressor through a simulation model to obtain a first mapping relationship; where the first mapping relationship is the mapping relationship between the compressor frequency, the compressor temperature parameter, the compressor pressure parameter, the refrigerant flow rate, and the target temperature and the highest refrigerant temperature; monitoring the actual operation of the air conditioner to obtain a second mapping relationship; where the second mapping relationship is the mapping relationship between the compressor frequency, the heat exchanger temperature, the opening degree of the electronic expansion valve, and the compressor temperature parameter, the compressor pressure parameter, the target temperature, and the refrigerant flow rate; and determining the mapping relationship between the device parameters of the air conditioner and the highest refrigerant temperature inside the compressor according to the first mapping relationship and the second mapping relationship; where the device parameters include: the compressor frequency, the compressor temperature parameter, and the opening degree of the electronic expansion valve.

[0011] Optionally, after obtaining the first mapping relationship and obtaining the second mapping relationship, it further includes: under the same operating conditions, determining a first target temperature according to the first mapping relationship, and determining a second target temperature according to the second mapping relationship; calculating the temperature difference between the first target temperature and the second target temperature; and in the case where the temperature difference reaches a temperature difference threshold, correcting the simulation model and re-determining the first mapping relationship.

[0012] Optionally, adjusting the operation parameters of the air conditioner according to the actual device parameters and the mapping relationship includes: determining the value range of each device parameter in the case where the highest refrigerant temperature inside the compressor reaches the temperature threshold according to the mapping relationship; and in the case where the actual device parameters are within the value range, adjusting the operation parameters of the air conditioner to make the value of the experimental device parameters tend to be away from the value range.

[0013] Optionally, the equipment parameters include: compressor operating parameters, compressor frequency, target temperature, heat exchanger temperature and electronic expansion valve opening; wherein the target temperature is the temperature of a target position inside the compressor.

[0014] Optionally, adjusting the operating parameters of the air conditioner includes: adjusting the compressor frequency and / or the opening of the electronic expansion valve of the air conditioner.

[0015] In some embodiments, the device includes: a processing module configured to obtain a mapping relationship between equipment parameters in the air conditioner and the maximum refrigerant temperature inside the compressor; a detection module configured to obtain actual equipment parameters of the air conditioner during the operation of the compressor; and a control module to adjust the operating parameters of the air conditioner according to the actual equipment parameters and the mapping relationship to avoid the maximum refrigerant temperature inside the compressor reaching a temperature threshold.

[0016] In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for preventing high-temperature decomposition of the refrigerant when running the program instructions.

[0017] In some embodiments, the air conditioner includes: an air conditioner body; the above-mentioned device for preventing high-temperature decomposition of the refrigerant is installed on the air conditioner body.

[0018] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for preventing high-temperature decomposition of the refrigerant is executed.

[0019] The method, device, air conditioner and storage medium for preventing high-temperature decomposition of refrigerant provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] First, the mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor is determined. During the actual operation of the air conditioner, the actual equipment parameters of the air conditioner are detected. And the operating parameters of the air conditioner are adjusted according to the real-time actual equipment parameters and the mapping relationship. In this way, the actual situation of the refrigerant temperature in the compressor can be determined according to the actual equipment parameters of the air conditioner, so that the operating parameters of the compressor can be adjusted in time to avoid the maximum refrigerant temperature in the compressor reaching the temperature threshold, causing the refrigerant to decompose due to heat. This process can be achieved during the normal operation of the air conditioner, without adding stabilizers to the refrigerant, and will not affect the refrigeration performance of the air conditioner. It is achieved that the refrigerant is prevented from being decomposed by high temperature without affecting the refrigeration performance of the air conditioner, thereby improving the stability of the compressor operation.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of a method for preventing high-temperature decomposition of a refrigerant provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of another method for preventing high-temperature decomposition of a refrigerant provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic diagram of another method for preventing high-temperature decomposition of a refrigerant provided by an embodiment of the present disclosure;

[0027] Figure 5-1 is an example diagram of device parameters provided by an embodiment of the present disclosure;

[0028] Figure 5-2 is an example diagram of another device parameter provided by an embodiment of the present disclosure;

[0029] Figure 6 is a schematic diagram of a device for preventing high-temperature decomposition of a refrigerant provided by an embodiment of the present disclosure;

[0030] Figure 7 is a schematic diagram of another device for preventing high-temperature decomposition of a refrigerant provided in an embodiment of the present disclosure;

[0031] Figure 8 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0033] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0037] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0038] In the embodiments of the present disclosure, smart home appliances refer to home appliances that are formed by introducing microprocessors, sensor technology, and network communication technology into home appliances. They have the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process of smart home appliances often relies on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips. For example, smart home appliances can be connected to electronic devices to enable users to remotely control and manage the smart home appliances.

[0039] In the disclosed embodiments, the terminal device refers to an electronic device with a wireless connection function. The terminal device can communicate with the above-mentioned smart home appliances by connecting to the Internet, or can communicate with the above-mentioned smart home appliances directly through Bluetooth, WiFi, etc. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a vehicle-mounted device built into a hover car, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, etc., or any combination thereof, wherein wearable devices include, for example: smart watches, smart bracelets, pedometers, etc.

[0040] Combination Figure 1 As shown, the embodiment of the present disclosure provides an air conditioner, including a compressor 10, a heat exchanger and a throttling device 30. Among them, the heat exchanger includes an evaporator and a condenser. The compressor 10, the evaporator 20, the throttling device 30, and the condenser 40 are connected in sequence through connecting pipes, and finally return to the compressor to form a refrigerant circulation loop.

[0041] The air conditioner also includes a plurality of temperature detection devices.

[0042] Optionally, the temperature detection device includes: a first temperature detection device, disposed at the exhaust port 101 of the compressor, configured to detect the compressor exhaust port temperature Td. A second temperature detection device, disposed at the return air port 102 of the compressor, configured to detect the compressor return air port temperature Ts. A third temperature detection device, disposed in a position close to the built-in motor in the compressor cylinder, configured to detect the target temperature Tm. A fourth temperature sensor, disposed at the condenser, configured to detect the condenser temperature, more specifically, the condenser temperature may be the condenser middle temperature Tc. A fifth temperature sensor, disposed at the evaporator, configured to detect the evaporator temperature, more specifically, the evaporator temperature may be the evaporator middle temperature Te.

[0043] The air conditioner also includes a pressure sensor.

[0044] Optionally, the pressure sensor includes: a first pressure sensor, disposed at the compressor exhaust port, configured to detect the compressor exhaust pressure Pd; and a second pressure sensor, disposed at the compressor return port, configured to detect the compressor return port pressure Ps.

[0045] The air conditioner also includes a flow meter, which is arranged in the refrigerant circulation circuit and is configured to detect the refrigerant flow M used by the system.

[0046] Combination Figure 2 As shown, the present disclosure embodiment discloses a method for preventing high-temperature decomposition of a refrigerant, which is applied to Figure 1 The air conditioner shown in the figure, the method for preventing the refrigerant from high temperature decomposition comprises:

[0047] S201, the processor obtains a mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor.

[0048] S202, during the operation of the compressor, the processor obtains actual equipment parameters of the air conditioner.

[0049] S203: The processor adjusts the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship to prevent the maximum refrigerant temperature inside the compressor from reaching a temperature threshold.

[0050] The method for preventing high-temperature decomposition of refrigerant provided by the embodiment of the present disclosure is first determined to determine the mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor. During the actual operation of the air conditioner, the actual equipment parameters of the air conditioner are detected. And the operating parameters of the air conditioner are adjusted according to the real-time actual equipment parameters and the mapping relationship. In this way, the actual situation of the refrigerant temperature in the compressor can be determined according to the actual equipment parameters of the air conditioner, so that the operating parameters of the compressor can be adjusted in time to avoid the maximum refrigerant temperature in the compressor reaching the temperature threshold, causing the refrigerant to decompose due to heat. This process can be achieved during the normal operation of the air conditioner, without adding a stabilizer to the refrigerant, and will not affect the refrigeration performance of the air conditioner. It is achieved that the refrigerant is prevented from being decomposed by high temperature without affecting the refrigeration performance of the air conditioner, thereby improving the stability of the compressor operation.

[0051] Optionally, the equipment parameters include: compressor operating parameters, compressor frequency, target temperature, heat exchanger temperature and electronic expansion valve opening. The target temperature is the temperature of the target position inside the compressor. The compressor operating parameters include: compressor temperature parameters and compressor pressure parameters. More specifically, the compressor temperature parameters include the compressor return air port temperature and the compressor exhaust port temperature. The compressor pressure parameters include the compressor exhaust port pressure and the compressor return air port pressure. The heat exchanger temperature includes the evaporator temperature and the condenser temperature. More specifically, the evaporator temperature includes the middle temperature of the evaporator, and the condenser temperature includes the middle temperature of the condenser. Setting the equipment parameters in this way can characterize the operation of the air conditioner in detail, and the corresponding maximum refrigerant temperature inside the compressor is unique.

[0052] Correspondingly, the actual device parameters are device parameters during the actual operation of the air conditioner.

[0053] In common air conditioners, compressor operating parameters, compressor frequency, heat exchanger temperature and electronic expansion valve opening are all conventional feedback data, so there is no need to add new sensors. Only sensors for detecting the target temperature are needed. The structure of the air conditioner has been slightly changed, and the implementation cost of the solution is relatively low.

[0054] Optionally, the temperature threshold is set to be lower than the temperature at which the refrigerant decomposes when heated. For example, R161 refrigerant will begin to decompose when heated at 170°C, and accordingly, the temperature threshold is set to be lower than 170°C. Specifically, the temperature threshold can be set to 150°C. In this way, it can be avoided that during the adjustment of the operating parameters, the refrigerant has been decomposed by heat, thereby interfering with the decomposition products that affect the operation of the compressor.

[0055] Combination Figure 3 As shown, the embodiment of the present disclosure provides another method for preventing the refrigerant from being decomposed by heat, comprising:

[0056] S301, the processor simulates the operation of the compressor through the simulation model to obtain a first mapping relationship, wherein the first mapping relationship is a mapping relationship between the compressor frequency, the compressor temperature parameter, the compressor pressure parameter, the refrigerant flow rate and the target temperature and the maximum refrigerant temperature.

[0057] S302, the processor obtains a second mapping relationship by monitoring the actual operation of the air conditioner, wherein the second mapping relationship is a mapping relationship between the compressor frequency, the heat exchanger temperature, the electronic expansion valve opening, the compressor temperature parameter, the compressor pressure parameter, the target temperature, and the refrigerant flow rate.

[0058] S303: The processor determines a mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor according to the first mapping relationship and the second mapping relationship.

[0059] S304: During the operation of the compressor, the processor obtains actual equipment parameters of the air conditioner.

[0060] S305: The processor adjusts the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship to prevent the maximum refrigerant temperature inside the compressor from reaching a temperature threshold.

[0061] Optionally, the processor simulates the operation of the compressor through a simulation model to obtain a first mapping relationship including: simulating the compressor operating frequency F, compressor exhaust port temperature Td, compressor return air port temperature Ts, compressor exhaust pressure Pd, compressor return air port pressure Ps and refrigerant flow M, obtaining the target temperature Tm and the maximum refrigerant temperature Tmax inside the compressor, and establishing a first mapping relationship.

[0062] Optionally, the processor obtains a second mapping relationship by monitoring the actual operation of the air conditioner, including: at different compressor frequencies F, corresponding to multiple groups of evaporator middle temperatures Te, condenser middle temperatures Tc and electronic expansion valve openings N, detecting the target temperature Tm, compressor exhaust port temperature Td, compressor return air port temperature Ts, compressor exhaust pressure Pd and compressor return air port pressure Ps, and establishing a second mapping relationship.

[0063] Optionally, the processor determines the mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor according to the first mapping relationship and the second mapping relationship, including: comparing the data groups in the first mapping relationship and the second mapping relationship to obtain the compressor operating frequency F, the middle temperature Te of the evaporator, the middle temperature Tc of the condenser, and the opening N of the electronic expansion valve, and detecting the mapping relationship between the target temperature Tm, the compressor exhaust port temperature Td, the compressor return air port temperature Ts and the maximum refrigerant temperature Tmax. More specifically, corresponding to a set of target temperatures Tm, compressor exhaust port temperature Td, compressor return air port temperature Ts, and compressor operating frequency F, the maximum refrigerant temperature Tmax is retrieved according to the first mapping relationship. Corresponding to the same set of target temperatures Tm, compressor exhaust port temperature Td, and compressor return air port temperature Ts, the middle temperature Te of the evaporator and the middle temperature Tc of the condenser are retrieved according to the second mapping relationship. In this way, the mapping relationship between the equipment parameters and the maximum refrigerant temperature can be obtained.

[0064] Optionally, after the processor obtains the first mapping relationship and obtains the second mapping relationship, it also includes: under the same operating conditions, the processor determines the first target temperature according to the first mapping relationship, and determines the second target temperature according to the second mapping relationship. The processor calculates the temperature difference between the first target temperature and the second target temperature. When the temperature reaches the temperature difference threshold, the simulation model is corrected and the first mapping relationship is re-determined. Taking into account that there is a certain error between the data obtained by the simulation and the experimental data, it is necessary to verify the experimental results of the simulation to determine the accuracy. Under the same operating conditions, the target temperature obtained by the simulation is compared with the target temperature obtained by the actual detection. If the temperature difference between the two is large, it means that the error of the simulation is large, and adjustment and optimization are required to simulate an accurate mapping relationship, thereby ensuring the accuracy of the maximum refrigerant temperature.

[0065] Optionally, the temperature difference between the first target temperature and the second target temperature can be reflected as an absolute value of the difference between the first target temperature and the second target temperature. In this way, the calculation process is simplified while accurately reflecting the error of the target temperature.

[0066] Optionally, the temperature difference threshold may determine 5% of the second target temperature.

[0067] Optionally, when the temperature difference is greater than the temperature difference threshold, correcting the simulation model includes: optimizing the finite element model mesh size and boundary layer thickness so that the y+ value of the model is ≤3 or ≥30, or adjusting the model surface roughness setting. And / or, calculating the referenced state equation adjustment to adapt to different state equations. And / or, adjusting boundary conditions, such as adjusting the velocity inlet, pressure outlet, etc. In the case where there is a large error in the data of the simulation model, it means that the simulation model has a setting error. The above-mentioned adjustment process can optimize the setting of the simulation model, thereby reducing the error and obtaining a more accurate mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor.

[0068] Combination Figure 4 As shown, the embodiment of the present disclosure provides another method for preventing high-temperature decomposition of a refrigerant, comprising:

[0069] S401, the processor obtains a mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor.

[0070] S402: During the operation of the compressor, the processor obtains actual equipment parameters of the air conditioner.

[0071] S403: The processor determines, based on the mapping relationship, the value ranges of various device parameters when the maximum refrigerant temperature inside the compressor reaches a temperature threshold.

[0072] S404: When the actual device parameter is within the value range, the processor adjusts the operating parameter of the air conditioner so that the value of the experimental device parameter tends to be away from the value range.

[0073] When the highest refrigerant temperature inside the compressor reaches the temperature threshold, the value range of each device parameter can be obtained. Some values ​​in the value range are shown in Table 1.

[0074] Table 1:

[0075] Serial number F Td Ts Tc Te Tm N 1 F1 Td1 Ts1 Tc1 Te1 Tm1 N1 2 F2 Td2 Ts2 Tc2 Te2 Tm2 N2 3 F3 Td3 Ts3 Tc3 Te3 Tm3 N3 … … … … … … … … n Fn Tdn Tsn Tcn Ten Tmn N

[0076] The data in Table 1 correspond to the region A in Figure 5 by expressing the changes of the equipment parameters in the form of a data curve. That is, when the state point of the actual equipment parameters of the air conditioner belongs to region A, the highest refrigerant temperature inside the compressor reaches the temperature threshold and needs to be adjusted.

[0077] Optionally, the processor adjusting the operating parameters of the air conditioner includes: the processor adjusting the compressor frequency and / or the opening of the electronic expansion valve of the air conditioner. In this way, adjusting the compressor frequency or adjusting the opening of the electronic expansion valve can cause changes in other device parameters and cause changes in the maximum refrigerant temperature inside the compressor.

[0078] Here combined Figure 5-1 and Figure 5-2 As shown, the specific process of the processor adjusting the operating parameters of the air conditioner so that the values ​​of the experimental equipment parameters tend to be far away from the value range is further explained: the processor determines according to the mapping relationship that when the equipment parameters are in area A, the maximum refrigerant temperature inside the compressor reaches the temperature threshold. Therefore, the operating parameters of the air conditioner should be adjusted so that the actual equipment parameters of the air conditioner tend to be far away from the area A. In this way, the maximum refrigerant temperature inside the compressor corresponding to the actual equipment parameters will be less than the temperature threshold, effectively avoiding the refrigerant from being decomposed by high temperature.

[0079] Further, area A is divided into four areas: A1, A2, A3, and A4. The specific adjustment strategy of the operating parameters can be set as follows: when the actual device parameters are in area A1, increase the opening of the electronic expansion valve, and / or increase the frequency of the compressor. When the actual device parameters are in area A2, increase the opening of the electronic expansion valve, and / or reduce the frequency of the compressor. When the actual device parameters are in area A3, reduce the opening of the electronic expansion valve, and / or reduce the frequency of the compressor. When the actual device parameters are in area A4, reduce the opening of the electronic expansion valve, and / or increase the frequency of the compressor. In this way, adjusting the opening of the electronic expansion valve and the frequency of the compressor can cause changes in other device parameters, so that each device parameter is away from the value range, thereby reducing the corresponding maximum refrigerant temperature inside the compressor, thereby avoiding thermal decomposition of the refrigerant.

[0080] Combination Figure 6 As shown, the embodiment of the present disclosure provides a device 200 for preventing high-temperature decomposition of refrigerant, including a processing module 61, a detection module 62 and a control module 63. Among them, the processing module 61 is configured to obtain a mapping relationship between the device parameters in the air conditioner and the maximum refrigerant temperature inside the compressor. The detection module 62 is configured to obtain the actual device parameters of the air conditioner during the operation of the compressor. The control module 63 adjusts the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship to prevent the maximum refrigerant temperature inside the compressor from reaching the temperature threshold.

[0081] The device for preventing high-temperature decomposition of refrigerant provided by the embodiment of the present disclosure is used to first determine the mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor. During the actual operation of the air conditioner, the actual equipment parameters of the air conditioner are detected. And the operating parameters of the air conditioner are adjusted according to the real-time actual equipment parameters and the mapping relationship. In this way, the actual situation of the refrigerant temperature in the compressor can be determined according to the actual equipment parameters of the air conditioner, so that the operating parameters of the compressor can be adjusted in time to avoid the maximum refrigerant temperature in the compressor reaching the temperature threshold, causing the refrigerant to decompose due to heat. This process can be achieved during the normal operation of the air conditioner, without adding a stabilizer to the refrigerant, and will not affect the refrigeration performance of the air conditioner. It is achieved that the refrigerant is prevented from being decomposed by high temperature without affecting the refrigeration performance of the air conditioner, thereby improving the stability of the compressor operation.

[0082] Combination Figure 7 As shown, the embodiment of the present disclosure provides a device 300 for preventing high-temperature decomposition of a refrigerant, including a processor 70 and a memory 71. Optionally, the device may also include a communication interface 72 and a bus 73. The processor 70, the communication interface 72, and the memory 71 may communicate with each other through the bus 73. The communication interface 72 may be used for information transmission. The processor 70 may call the logic instructions in the memory 71 to execute the method for preventing high-temperature decomposition of a refrigerant in the above embodiment.

[0083] In addition, the logic instructions in the above-mentioned memory 71 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0084] The memory 71 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 70 executes the function application and data processing by running the program instructions / modules stored in the memory 71, that is, the method for preventing the high temperature decomposition of the refrigerant in the above embodiment is implemented.

[0085] The memory 71 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 71 may include a high-speed random access memory and may also include a non-volatile memory.

[0086] Combination Figure 8As shown, an embodiment of the present disclosure provides an air conditioner 100, including: an air conditioner body, and the above-mentioned device 200 (300) for preventing high-temperature decomposition of refrigerant. The device 200 (300) for preventing high-temperature decomposition of refrigerant is installed on the air conditioner body. The installation relationship described here is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections or signal transmission connections. It can be understood by those skilled in the art that the device 200 (300) for preventing high-temperature decomposition of refrigerant can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0087] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for preventing high-temperature decomposition of a refrigerant.

[0088] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0089] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0090] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0091] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0092] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0093] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for preventing high temperature decomposition of a refrigerant, It is characterized in that include: Obtaining a mapping relationship between the equipment parameters of the air conditioner and the maximum refrigerant temperature inside the compressor; During the operation of the compressor, the actual equipment parameters of the air conditioner are obtained; adjusting the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship to prevent the maximum refrigerant temperature inside the compressor from reaching a temperature threshold; Wherein, the step of obtaining a mapping relationship between a device parameter in the air conditioner and a maximum refrigerant temperature inside the compressor includes: The operation of the compressor is simulated by the simulation model to obtain a first mapping relationship; wherein the first mapping relationship is a mapping relationship between the compressor frequency, the compressor temperature parameter, the compressor pressure parameter, the refrigerant flow rate and the target temperature and the maximum refrigerant temperature; By monitoring the actual operation of the air conditioner, a second mapping relationship is obtained; wherein the second mapping relationship is a mapping relationship between the compressor frequency, the heat exchanger temperature, the electronic expansion valve opening and the compressor temperature parameter, the compressor pressure parameter, the target temperature, and the refrigerant flow rate; Determine a mapping relationship between the equipment parameter of the air conditioner and the maximum refrigerant temperature inside the compressor according to the first mapping relationship and the second mapping relationship; The method of adjusting the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship includes: determining the value range of each device parameter when the maximum refrigerant temperature inside the compressor reaches the temperature threshold according to the mapping relationship; when the actual device parameter is within the value range, adjusting the operating parameters of the air conditioner so that the value of the actual device parameter tends to move away from the value range; the device parameters include compressor temperature parameters, compressor pressure parameters, compressor frequency, target temperature, heat exchanger temperature and electronic expansion valve opening; wherein the target temperature is the temperature of a target position inside the compressor.

2. The method according to claim 1, It is characterized in that The obtaining of the first mapping relationship and the obtaining of the second mapping relationship further includes: Under the same operating conditions, determining a first target temperature according to the first mapping relationship, and determining a second target temperature according to the second mapping relationship; calculating a temperature difference between the first target temperature and the second target temperature; When the temperature difference reaches a temperature difference threshold, the simulation model is corrected and the first mapping relationship is re-determined.

3. The method according to claim 1, It is characterized in that The operating parameters of the air conditioner are adjusted as follows: Adjust the compressor frequency and / or electronic expansion valve opening of the air conditioner.

4. A device for preventing high temperature decomposition of refrigerant, It is characterized in that include: A processing module configured to obtain a mapping relationship between a device parameter in the air conditioner and a maximum refrigerant temperature inside the compressor; The detection module is configured to obtain actual equipment parameters of the air conditioner during the operation of the compressor; A control module, adjusting the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship to prevent the maximum refrigerant temperature inside the compressor from reaching a temperature threshold; Wherein, the step of obtaining a mapping relationship between a device parameter in the air conditioner and a maximum refrigerant temperature inside the compressor includes: The operation of the compressor is simulated by the simulation model to obtain a first mapping relationship; wherein the first mapping relationship is a mapping relationship between the compressor frequency, the compressor temperature parameter, the compressor pressure parameter, the refrigerant flow rate and the target temperature and the maximum refrigerant temperature; By monitoring the actual operation of the air conditioner, a second mapping relationship is obtained; wherein the second mapping relationship is a mapping relationship between the compressor frequency, the heat exchanger temperature, the electronic expansion valve opening and the compressor temperature parameter, the compressor pressure parameter, the target temperature, and the refrigerant flow rate; Determine a mapping relationship between the equipment parameter of the air conditioner and the maximum refrigerant temperature inside the compressor according to the first mapping relationship and the second mapping relationship; The method of adjusting the operating parameters of the air conditioner according to the actual device parameters and the mapping relationship includes: determining the value range of each device parameter when the maximum refrigerant temperature inside the compressor reaches the temperature threshold according to the mapping relationship; when the actual device parameter is within the value range, adjusting the operating parameters of the air conditioner so that the value of the actual device parameter tends to move away from the value range; the device parameters include compressor temperature parameters, compressor pressure parameters, compressor frequency, target temperature, heat exchanger temperature and electronic expansion valve opening; wherein the target temperature is the temperature of a target position inside the compressor.

5. A device for preventing high-temperature decomposition of a refrigerant, comprising a processor and a memory storing program instructions, It is characterized in that The processor is configured to execute the method for preventing high-temperature decomposition of a refrigerant as claimed in any one of claims 1 to 3 when running the program instructions.

6. An air conditioner, It is characterized in that include: Air conditioner body; The device for preventing high-temperature decomposition of refrigerant as described in claim 4 or 5 is installed on the air conditioner body.

7. A storage medium storing program instructions, It is characterized in that When the program instructions are executed, the method for preventing high-temperature decomposition of a refrigerant as claimed in any one of claims 1 to 3 is executed.

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