Method for controlling leakage of flammable refrigerant, control device, and air conditioner

Abstract

The application provides a combustible refrigerant leakage control method, a control device and an air conditioner. The combustible refrigerant leakage control method comprises the following steps: receiving a start-up instruction for controlling the start-up of the air conditioner, acquiring an indoor environment temperature and an outdoor environment temperature, and acquiring an actual saturation temperature corresponding to at least one of a low-pressure pressure and a high-pressure pressure of a compressor; determining a standard saturation temperature according to the indoor environment temperature and the outdoor environment temperature; generating an execution logic according to the actual saturation temperature and the standard saturation temperature, and controlling the operation of the compressor according to the execution logic. The combustible refrigerant leakage control method, the control device and the air conditioner provided by the application can avoid the safety risks such as fire or explosion of the air conditioner caused by the leakage of the combustible refrigerant, improve the safety use coefficient of the air conditioner, reduce or even avoid the safety hazards caused by the leakage of the combustible refrigerant, and ensure the personal safety of users.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and in particular to a method, control device, and air conditioner for controlling the leakage of flammable refrigerant. Background Technology

[0002] In related technologies, flammable or low-flammability refrigerants are gradually coming into view and entering households. However, flammable refrigerants such as R32 / R290 pose a certain risk of leakage during operation. If their concentration reaches a certain range and an ignition source is added, it can easily cause a fire or explosion, thereby posing a threat to personal safety.

[0003] Currently, ordinary air conditioners can identify the concentration of refrigerant leaks using a concentration detector. However, this method is costly and prone to sensor malfunctions, which can lead to a waste of resources, especially when the refrigerant leak is not significant. Summary of the Invention

[0004] This invention provides a method, device, and air conditioner for controlling the leakage of flammable refrigerant, in order to overcome the deficiencies in the prior art and achieve the following technical effects: avoiding safety risks such as fire or explosion caused by air conditioner leakage of flammable refrigerant, improving the safety coefficient of air conditioner, reducing or even avoiding safety hazards caused by flammable refrigerant leakage, and ensuring the personal safety of users.

[0005] A method for controlling the leakage of a flammable refrigerant according to a first aspect embodiment of the present invention includes:

[0006] Upon receiving the start command to control the air conditioner to turn on, the system obtains the indoor ambient temperature, the outdoor ambient temperature, and the actual saturation temperature corresponding to at least one of the compressor's low-pressure and high-pressure.

[0007] The standard saturation temperature is determined based on the indoor ambient temperature and the outdoor ambient temperature.

[0008] The execution logic is generated based on the actual saturation temperature and the standard saturation temperature, and the operation of the compressor is controlled based on the execution logic.

[0009] According to an embodiment of the present invention, the step of generating execution logic based on the actual saturation temperature and the standard saturation temperature, and controlling the operation of the compressor according to the execution logic, specifically includes:

[0010] If the difference between the actual saturation temperature and the standard saturation temperature does not exceed the set warning threshold, the compressor is controlled to start.

[0011] If the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold, the air conditioner is controlled to perform a leakage protection operation, and the compressor is controlled to start after the leakage protection operation is completed.

[0012] According to one embodiment of the present invention, the leakage protection operation includes:

[0013] The fresh air system, which is linked to the air conditioning system, is activated.

[0014] According to one embodiment of the present invention, the leakage protection operation includes:

[0015] Control the indoor and / or outdoor fans of the air conditioner to turn on and run for a set duration.

[0016] According to one embodiment of the present invention, in the step of controlling the indoor fan and / or outdoor fan of the air conditioner to turn on and run for a set period of time:

[0017] If it is determined that the indoor fan and / or outdoor fan are turned on, the speed of the indoor fan and / or outdoor fan is adjusted according to the difference between the actual saturation temperature and the standard saturation temperature.

[0018] The difference between the actual saturation temperature and the standard saturation temperature is positively correlated with the rotational speed of the indoor fan and / or the outdoor fan.

[0019] According to one embodiment of the present invention, in the step of controlling the indoor fan and / or outdoor fan of the air conditioner to turn on and run for a set period of time:

[0020] The indoor fan and / or outdoor fan are controlled to start at the lowest speed, and the set duration is determined based on the difference between the actual saturation temperature and the standard saturation temperature.

[0021] The difference between the actual saturation temperature and the standard saturation temperature is positively correlated with the set duration.

[0022] According to one embodiment of the present invention, the step of determining the standard saturation temperature based on the indoor ambient temperature and the outdoor ambient temperature specifically includes:

[0023] Based on the fact that the absolute value of the difference between the indoor ambient temperature and the outdoor ambient temperature does not exceed a set difference, the standard saturation temperature is determined as the first set temperature, and the first set temperature is equal to the outdoor ambient temperature.

[0024] The standard saturation temperature is determined as the second set temperature based on the absolute value of the difference between the indoor ambient temperature Tai and the outdoor ambient temperature Tao, which exceeds the set difference value. The second set temperature is: α×Tao+β×Tai, where α and β are constants.

[0025] According to an embodiment of the present invention, the step of controlling the air conditioner to perform a leakage protection operation based on the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold, and controlling the compressor to start after the leakage protection operation is completed, specifically includes:

[0026] If the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold, the air conditioner is controlled to send an alarm message to the user and obtain the control command issued by the user.

[0027] If the control command is determined to be a shutdown command, then the air conditioner is shut down.

[0028] If the control command is determined to be to continue starting, the air conditioner is controlled to perform the leakage protection operation until the difference between the actual saturation temperature and the standard saturation temperature is less than or equal to the set warning threshold, and then the compressor is controlled to start.

[0029] According to an embodiment of the present invention, the step of controlling the air conditioner to perform a leakage protection operation based on the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold, and controlling the compressor to start after the leakage protection operation is completed, specifically includes:

[0030] The detection concentration of the leaked refrigerant is obtained based on the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold.

[0031] If the detected concentration of the leaked refrigerant is greater than the set concentration, the air conditioner will be shut down.

[0032] If the detected concentration of the leaked refrigerant is determined to be less than or equal to the set concentration, the air conditioner is controlled to perform the leak protection operation, and the compressor is controlled to start after the leak protection operation is completed.

[0033] A leak control device for a flammable refrigerant according to a second aspect embodiment of the present invention includes:

[0034] The acquisition module is used to receive the start command for controlling the air conditioner to start, acquire the indoor ambient temperature and the outdoor ambient temperature, and the actual saturation temperature corresponding to at least one of the low pressure and high pressure of the compressor.

[0035] The first control module is used to determine the standard saturation temperature based on the indoor ambient temperature and the outdoor ambient temperature.

[0036] The second control module is used to generate execution logic based on the actual saturation temperature and the standard saturation temperature, and to control the operation of the compressor based on the execution logic.

[0037] An air conditioner according to a third aspect embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements a method for controlling the leakage of flammable refrigerant as described in a first aspect embodiment of the present invention.

[0038] This invention proposes a method for controlling the leakage of flammable refrigerant. Before the air conditioner is turned on, parameters such as indoor ambient temperature, outdoor ambient temperature, and the actual saturation temperature corresponding to high pressure and / or low pressure are acquired. By analyzing the relationship between these parameters, it is determined whether there is a flammable refrigerant leakage problem inside the air conditioner. If a refrigerant leakage problem is determined, the method avoids the safety risks such as fire or explosion caused by the air conditioner due to flammable refrigerant leakage by controlling the compressor to remain off and controlling the indoor and outdoor fans to start to reduce the concentration of leaked refrigerant, thereby improving the safety factor of the air conditioner, reducing or even avoiding the safety hazards caused by flammable refrigerant leakage, and ensuring the personal safety of users.

[0039] Furthermore, the control method of the present invention can determine whether the air conditioner has a refrigerant leakage problem by acquiring and analyzing the above parameters. Compared with the solutions in related technologies, it eliminates the need for the installation of a concentration detector, reduces costs, simplifies the structure, and eliminates concerns about the failure of the concentration detector, resulting in more stable control. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a flowchart illustrating the method for controlling the leakage of flammable refrigerant provided by the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of the flammable refrigerant leakage control device provided by the present invention;

[0043] Figure 3 This is a structural schematic diagram of the air conditioner provided by the present invention;

[0044] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention.

[0045] Figure label:

[0046] 1. Compressor; 2. Four-way valve; 3. Condenser; 4. Electronic expansion valve; 5. Evaporator; 6. Outdoor fan; 7. Indoor fan; 8. Outdoor temperature sensor; 9. Indoor temperature sensor; 10. High-pressure sensor; 11. Low-pressure sensor; 110. Acquisition module; 120. First control module; 130. Second control module. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0048] The following description, with reference to the accompanying drawings, outlines the method, control device, and air conditioner for controlling the leakage of flammable refrigerant proposed in this invention. Before providing a detailed description of the embodiments of this invention, the overall application scenario is first described. The method, control device, electronic device, and computer-readable storage medium for controlling the leakage of flammable refrigerant according to the embodiments of this invention can be applied locally to air conditioners, to cloud platforms in the Internet field, or to other types of cloud platforms in the Internet field, or to third-party devices. These third-party devices may include various types such as mobile phones, tablets, laptops, in-vehicle computers, and other smart terminals.

[0049] The following description uses only the leakage control method of flammable refrigerant applicable to air conditioners as an example. It should be understood that the control method of this embodiment can also be applied to cloud platforms and third-party devices.

[0050] like Figure 1 As shown, a method for controlling the leakage of flammable refrigerant according to a first aspect embodiment of the present invention includes:

[0051] Step S1: Receive the start command to control the air conditioner to start, and obtain the indoor ambient temperature and outdoor ambient temperature, as well as the actual saturation temperature corresponding to at least one of the low pressure and high pressure of compressor 1.

[0052] Step S2: Determine the standard saturation temperature based on the indoor and outdoor ambient temperatures;

[0053] Step S3: Generate execution logic based on the actual saturation temperature and the standard saturation temperature, and control the operation of compressor 1 according to the execution logic.

[0054] The method for controlling the leakage of flammable refrigerant according to embodiments of the present invention is applicable to electrical appliances such as air conditioning systems or heat pump water heater systems that utilize flammable refrigerant for refrigeration and heating cycles. Taking the application of the method for controlling the leakage of flammable refrigerant in an air conditioning system as an example, ... Figure 3 As shown, when the air conditioner receives a cooling command, the air conditioner compressor 1 starts, and the refrigerant flows through the four-way valve 2 to the outdoor unit condenser 3. After being throttled by the electronic expansion valve 4, it enters the indoor unit evaporator 5, and then enters the compressor 1 through the four-way valve 2, thus completing a complete cooling cycle.

[0055] Based on the above air conditioning structure, the specific working principle of the flammable refrigerant leakage control method proposed in this invention is as follows: Since the system pressure (i.e., high pressure and low pressure) will have a stable state before the unit starts, it is possible to determine whether there is a refrigerant leakage fault in the air conditioner by detecting whether this stable state is normal.

[0056] Specifically, before the unit starts running, the indoor and outdoor ambient temperatures are detected, and the high-pressure and low-pressure pressures at both ends of the compressor 1 are collected respectively. Since the high-pressure saturation temperature corresponding to the high-pressure pressure and the low-pressure saturation temperature corresponding to the low-pressure pressure are equal under normal shutdown conditions, and the high-pressure saturation temperature and the low-pressure saturation temperature are respectively related to the indoor and outdoor ambient temperatures under normal shutdown conditions, the control method of the present invention uses the relationship between the above parameters to determine whether the refrigerant in the system is leaking, and then controls the compressor 1 to start or continue to shut down.

[0057] Based on the above working principle, the specific working process of the leakage control method of the present invention is as follows: After the user issues a control command to turn on the air conditioner, the controller receives the command to turn on the air conditioner. After receiving the command, the controller obtains the indoor ambient temperature based on the detection result of the indoor temperature sensor 9 and the outdoor ambient temperature based on the detection result of the outdoor temperature sensor 8. Furthermore, the controller will also obtain at least one of the low pressure and high pressure of the compressor 1, and determine the low pressure saturation temperature corresponding to the low pressure and / or the high pressure saturation temperature corresponding to the high pressure based on the low pressure and / or the high pressure saturation temperature.

[0058] Subsequently, the controller will analyze and judge the indoor and outdoor ambient temperatures to obtain the standard saturation temperature corresponding to different situations and scenarios. It can be understood that under the normal shutdown state of the air conditioner (that is, the state in which the air conditioner has not leaked refrigerant), the low-pressure saturation temperature and the high-pressure saturation temperature (collectively referred to as the actual saturation temperature) are usually equal, and the actual saturation temperature satisfies a certain relationship with the indoor and outdoor ambient temperatures. That is, the actual saturation temperature satisfies a certain relationship with the standard saturation temperature obtained in step S2. Therefore, in step S3, the controller will analyze and compare the actual saturation temperature and the standard saturation temperature to determine whether they meet the standard relationship under the normal shutdown state. If they do not meet the standard relationship, it proves that there is a problem of flammable refrigerant leakage inside the air conditioner. At this time, the air conditioner can avoid the safety risks of fire or explosion caused by flammable refrigerant leakage by controlling the compressor 1 to continue to shut down and controlling the indoor and outdoor fans to start to reduce the concentration of leaked refrigerant. This will improve the safety factor of the air conditioner, reduce or even avoid the safety hazards caused by flammable refrigerant leakage, and ensure the personal safety of users.

[0059] The compressor 1 is equipped with a low-pressure sensor 11 at its intake port and a high-pressure sensor 10 at its exhaust port. The low-pressure sensor 11 is used to detect the low-pressure, and the high-pressure sensor 10 is used to detect the high-pressure. The controller can obtain the low-pressure saturation temperature corresponding to the low-pressure and / or the high-pressure saturation temperature corresponding to the high-pressure (collectively referred to as the actual saturation temperature) based on the pressure-saturation temperature lookup table.

[0060] In related technologies, flammable or low-flammability refrigerants are gradually coming into view and entering households. However, flammable refrigerants such as R32 / R290 pose a certain risk of leakage during operation. If their concentration reaches a certain range and an ignition source is added, it can easily cause a fire or explosion, thereby posing a threat to personal safety.

[0061] Currently, ordinary air conditioners can identify the concentration of refrigerant leaks using a concentration detector. However, this method is costly and prone to sensor malfunctions, which can lead to a waste of resources, especially when the refrigerant leak is not significant.

[0062] To address the technical deficiencies in the aforementioned related technologies, this invention proposes a method for controlling the leakage of flammable refrigerant. Before the air conditioner is turned on, parameters such as indoor ambient temperature, outdoor ambient temperature, and the actual saturation temperature corresponding to high pressure and / or low pressure are acquired. By analyzing the relationship between these parameters, it is determined whether there is a flammable refrigerant leak inside the air conditioner. If a refrigerant leak is confirmed, the method avoids the safety risks of fire or explosion caused by the leaking refrigerant by controlling the compressor 1 to remain off and controlling the indoor and outdoor fans to start to reduce the concentration of leaked refrigerant. This improves the safety factor of the air conditioner, reduces or even avoids the safety hazards caused by flammable refrigerant leaks, and ensures the personal safety of users.

[0063] Furthermore, the control method of the present invention can determine whether the air conditioner has a refrigerant leakage problem by acquiring and analyzing the above parameters. Compared with the solutions in related technologies, it eliminates the need for the installation of a concentration detector, reduces costs, simplifies the structure, and eliminates concerns about the failure of the concentration detector, resulting in more stable control.

[0064] According to some embodiments of the present invention, the step of determining the standard saturation temperature based on indoor ambient temperature and outdoor ambient temperature specifically includes:

[0065] Based on the fact that the absolute value of the difference between the indoor ambient temperature and the outdoor ambient temperature does not exceed the set difference, the standard saturation temperature is determined as the first set temperature, and the first set temperature is equal to the outdoor ambient temperature.

[0066] If the absolute value of the difference between the indoor and outdoor ambient temperatures exceeds a set difference, the standard saturation temperature is determined as the second set temperature. The second set temperature = α * outdoor ambient temperature + β * indoor ambient temperature, where α and β are constants.

[0067] It can be understood that under normal shutdown conditions, i.e., when the air conditioner does not leak refrigerant, the high-pressure saturation temperature Pd_t corresponding to the high-pressure Pd, the low-pressure saturation temperature Ps_t corresponding to the low-pressure Ps, the indoor ambient temperature Tai, and the outdoor ambient temperature Tao satisfy the following relationship:

[0068] Under normal circumstances, if the difference between Tao and Tai is not significant, i.e., |Tao-Tai|≤5℃, then Pd_t=Ps_t=Tao.

[0069] If the difference between Tao and Tai is large, i.e. |Tao-Tai|>5℃, then Pd_t=Ps_t=α*Tao+β*Tai, where α and β are constants, generally set to 1.

[0070] In this embodiment, if the absolute value of the difference between the indoor ambient temperature and the outdoor ambient temperature exceeds a set difference (e.g., 5°C), the standard saturation temperature is α*Tao+β*Tai; if the absolute value of the difference between the indoor ambient temperature and the outdoor ambient temperature does not exceed the set difference (e.g., 5°C), the standard saturation temperature is Tao.

[0071] It should be noted that the above-mentioned difference can be set according to actual needs, and the present invention does not impose any special limitation on the specific size of the difference.

[0072] According to some embodiments of the present invention, the steps of generating execution logic based on the actual saturation temperature and the standard saturation temperature, and controlling the operation of compressor 1 according to the execution logic, specifically include:

[0073] If the difference between the actual saturation temperature and the standard saturation temperature does not exceed the set warning threshold, control compressor 1 to start.

[0074] If the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold, the air conditioner is controlled to perform a leakage protection operation, and the compressor 1 is controlled to start after the leakage protection operation is completed.

[0075] It is understandable that if the difference between the actual saturation temperature and the standard saturation temperature is small, that is, it does not exceed the set warning threshold, it proves that there is no leak of flammable refrigerant inside the air conditioner, or the amount of flammable refrigerant leaked inside the air conditioner is very small and does not affect the normal use of the air conditioner. At this time, the controller can directly control the compressor 1 to start, and there is no need to worry about the various safety risks caused by refrigerant leakage.

[0076] If the difference between the actual saturation temperature and the standard saturation temperature is large, that is, exceeding the set warning threshold, it proves that a flammable refrigerant leak has occurred inside the air conditioner, and the amount of flammable refrigerant leaked is also large. At this time, compressor 1 will not be turned on. The air conditioner will perform a leak protection operation to deal with the leaked flammable refrigerant inside the air conditioner. Only after the treatment is completed will compressor 1 be turned on for normal operation. In this way, the leak protection operation can deal with the leaked flammable refrigerant, avoid safety accidents caused by excessive leakage of flammable refrigerant, and ensure the safety of users.

[0077] In one embodiment of the present invention, the leakage protection operation includes: controlling the start of a fresh air system linked to the air conditioner.

[0078] In this way, by using the fresh air system to introduce fresh air to dilute the concentration of the flammable refrigerant leaking into the air conditioner, the leaked refrigerant can be treated, avoiding safety accidents caused by excessively high concentrations of leaked refrigerant. It can be understood that when the concentration of the leaked flammable refrigerant is diluted to a certain level, that is, after the fresh air system has been running for a certain period of time, compressor 1 can be directly turned on to work normally. At this time, the concentration of the leaked refrigerant is very low, and there is no need to worry about safety hazards such as fire or explosion.

[0079] In another embodiment of the present invention, the leakage protection operation includes: controlling the indoor fan 7 and / or the outdoor fan 6 of the air conditioner to turn on and run for a set period of time.

[0080] In this way, the airflow of the indoor fan 7 and / or the outdoor fan 6 is used to accelerate the diffusion of the leaked refrigerant, thereby treating the leaked refrigerant and quickly reducing the concentration of the leaked flammable refrigerant. It can be understood that after the indoor fan 7 and / or the outdoor fan 6 are turned on and run for a set period of time, the compressor 1 can be turned on directly to work normally. At this time, the concentration of the leaked refrigerant is very low, and there is no need to worry about the occurrence of safety hazards such as fire and explosion.

[0081] For example, upon receiving the power-on command, the indoor and outdoor units communicate and obtain Pd_t and Ps_t. When Pd_t and Ps_t do not exceed the alarm threshold, the indoor and outdoor unit fans run for 45 seconds, and then the unit startup and operation procedures are executed normally until the end.

[0082] According to some embodiments of the present invention, in the step of controlling the indoor fan 7 and / or the outdoor fan 6 of the air conditioner to turn on and run for a set period of time:

[0083] If the indoor fan 7 and / or the outdoor fan 6 are turned on, adjust the speed of the indoor fan 7 and / or the outdoor fan 6 according to the difference between the actual saturation temperature and the standard saturation temperature.

[0084] The difference between the actual saturation temperature and the standard saturation temperature is positively correlated with the rotational speed of the indoor fan 7 and / or the outdoor fan 6.

[0085] It is understandable that the difference between the actual saturation temperature and the standard saturation temperature can indirectly reflect the leakage amount of flammable refrigerant in the air conditioner. That is, the larger the difference, the greater the leakage amount of flammable refrigerant in the air conditioner. In order to accelerate the diffusion of flammable refrigerant, the controller will adjust the speed of the indoor fan 7 and / or the outdoor fan 6 accordingly to increase the speed so that the current speed can match the current leakage amount of refrigerant. In this way, the set duration of the operation of the indoor fan 7 and / or the outdoor fan 6 can be stabilized at a certain standard value, and the control is more stable and precise.

[0086] According to other embodiments of the present invention, in the step of controlling the indoor fan 7 and / or the outdoor fan 6 of the air conditioner to turn on and run for a set period of time:

[0087] Control the indoor fan 7 and / or the outdoor fan 6 to start at the lowest speed, and determine the set duration based on the difference between the actual saturation temperature and the standard saturation temperature.

[0088] The difference between the actual saturation temperature and the standard saturation temperature is positively correlated with the set duration.

[0089] It is understandable that the difference between the actual saturation temperature and the standard saturation temperature can indirectly reflect the amount of flammable refrigerant leakage in the air conditioner. That is, the larger the difference, the larger the amount of flammable refrigerant leakage in the air conditioner. Therefore, in order to achieve complete diffusion of the leaked flammable refrigerant, with the indoor fan 7 and / or outdoor fan 6 operating at a constant speed, the larger the amount of flammable refrigerant leakage, the longer the set time for the fan operation should be. This ensures the complete diffusion of the leaked refrigerant and avoids safety hazards such as fire and explosion caused by insufficient refrigerant diffusion.

[0090] According to some embodiments of the present invention, the steps of controlling the air conditioner to perform a leakage protection operation based on the difference between the actual saturation temperature and the standard saturation temperature exceeding a set warning threshold, and controlling the compressor 1 to start after the leakage protection operation is completed, specifically include:

[0091] If the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold, the air conditioner is controlled to send an alarm message to the user and to obtain the control command issued by the user.

[0092] If the control command is determined to be a stop, then the air conditioner will be stopped.

[0093] If the control command is determined to be to continue starting, the air conditioner will be controlled to perform leakage protection operation until the difference between the actual saturation temperature and the standard saturation temperature is less than or equal to the set warning threshold, and then the compressor 1 will be controlled to start.

[0094] In this embodiment, when the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold, to prevent false alarms caused by environmental factors, the alarm information is further sent to the user, allowing them to decide whether to shut down the unit. If the user requests a shutdown of the cooling system, the unit is shut down directly. If the user requests continued operation, the indoor and outdoor fans are forcibly turned on for 90 seconds. During this time, the unit does not start, and the system pressure changes further after the fans are forcibly turned on, after which system pressure monitoring continues. If the startup conditions are met, the unit is started.

[0095] According to other embodiments of the present invention, the steps of controlling the air conditioner to perform a leakage protection operation based on the difference between the actual saturation temperature and the standard saturation temperature exceeding a set warning threshold, and controlling the compressor 1 to start after the leakage protection operation is completed, specifically include:

[0096] The detection concentration of the leaked refrigerant is obtained based on the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold.

[0097] If the detected concentration of leaked refrigerant is greater than the set concentration, the air conditioner will be shut down.

[0098] If the detected concentration of the leaking refrigerant is less than or equal to the set concentration, the air conditioner is controlled to perform a leak protection operation, and the compressor 1 is controlled to start after the leak protection operation is completed.

[0099] In this embodiment, when the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold, to prevent false alarms caused by environmental factors, the concentration of leaked refrigerant will be further measured. If the concentration of leaked refrigerant is greater than the set concentration, the unit will be shut down directly. If the concentration of leaked refrigerant is less than or equal to the set concentration, the indoor and outdoor fans will be forcibly turned on for 90 seconds. During this time, the unit will not start, and the system pressure will change further after the fans are forcibly turned on, and then the system pressure will continue to be monitored. If the start-up conditions are met, the unit will start up.

[0100] The leakage control device for flammable refrigerant provided by the present invention will be described below. The leakage control device for flammable refrigerant described below can be referred to in correspondence with the leakage control method for flammable refrigerant described above.

[0101] like Figure 2 As shown, a leak control device for a flammable refrigerant according to a second aspect embodiment of the present invention includes:

[0102] The acquisition module 110 is used to receive the start command for controlling the air conditioner to start, acquire the indoor ambient temperature and the outdoor ambient temperature, and the actual saturation temperature corresponding to at least one of the low pressure and high pressure of the compressor 1.

[0103] The first control module 120 is used to determine the standard saturation temperature based on the indoor and outdoor ambient temperatures.

[0104] The second control module 130 is used to generate execution logic based on the actual saturation temperature and the standard saturation temperature, and to control the operation of the compressor 1 according to the execution logic.

[0105] An air conditioner according to a third aspect embodiment of the present invention includes an indoor unit, an outdoor unit, and a leak control device for a flammable refrigerant as described in a second aspect embodiment of the present invention.

[0106] like Figure 3 As shown, according to some embodiments of the present invention, the air conditioner includes a condenser 3, a four-way valve 2, a compressor 1, an evaporator 5, and an electronic expansion valve 4 connected by refrigerant piping.

[0107] The compressor 1 has a low-pressure sensor 11 at its suction port, a high-pressure sensor 10 at its discharge port, an outdoor temperature sensor 8 inside the outdoor unit, and an indoor temperature sensor 9 inside the indoor unit.

[0108] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4 As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions in the memory 830 to execute a method for controlling the leakage of flammable refrigerant, including: receiving a start-up command to control the air conditioner to start; acquiring the indoor ambient temperature and the outdoor ambient temperature, as well as the actual saturation temperature corresponding to at least one of the low-pressure and high-pressure of the compressor 1; determining a standard saturation temperature based on the indoor ambient temperature and the outdoor ambient temperature; generating execution logic based on the actual saturation temperature and the standard saturation temperature; and controlling the operation of the compressor 1 according to the execution logic.

[0109] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute a method for controlling the leakage of flammable refrigerant, including: receiving a start-up command to control the air conditioner to start; acquiring the indoor ambient temperature and the outdoor ambient temperature, as well as the actual saturation temperature corresponding to at least one of the low-pressure and high-pressure of the compressor 1; determining a standard saturation temperature based on the indoor ambient temperature and the outdoor ambient temperature; generating execution logic based on the actual saturation temperature and the standard saturation temperature; and controlling the operation of the compressor 1 according to the execution logic.

[0111] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a method for controlling the leakage of a flammable refrigerant, comprising: receiving a start-up command to control the air conditioner to start; acquiring an indoor ambient temperature and an outdoor ambient temperature, as well as an actual saturation temperature corresponding to at least one of the low-pressure and high-pressure of the compressor 1; determining a standard saturation temperature based on the indoor ambient temperature and the outdoor ambient temperature; generating execution logic based on the actual saturation temperature and the standard saturation temperature; and controlling the operation of the compressor 1 according to the execution logic.

[0112] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0113] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leakage control method of a flammable refrigerant, characterized by, The method comprises the following steps: receiving a start instruction for starting the air conditioner, obtaining an indoor environment temperature and an outdoor environment temperature, and an actual saturation temperature corresponding to at least one of a low-pressure pressure and a high-pressure pressure of a compressor; determining a standard saturation temperature according to the indoor environment temperature and the outdoor environment temperature; generating an execution logic according to the actual saturation temperature and the standard saturation temperature, and controlling the operation of the compressor according to the execution logic; the step of generating the execution logic according to the actual saturation temperature and the standard saturation temperature, and controlling the operation of the compressor according to the execution logic, specifically comprises: controlling the compressor to start according to that the difference between the actual saturation temperature and the standard saturation temperature does not exceed a set warning threshold value; controlling the air conditioner to perform a leakage protection operation according to that the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold value, and controlling the compressor to start after the leakage protection operation is completed; the step of determining the standard saturation temperature according to the indoor environment temperature and the outdoor environment temperature, specifically comprises: determining the standard saturation temperature as a first set temperature according to that the absolute value of the difference between the indoor environment temperature and the outdoor environment temperature does not exceed a set difference value, the first set temperature being equal to the outdoor environment temperature; determining the standard saturation temperature as a second set temperature according to that the absolute value of the difference between the indoor environment temperature Tai and the outdoor environment temperature Tao exceeds the set difference value, the second set temperature being: α × Tao + β × Tai, α and β being constants.

2. The flammable refrigerant leakage control method according to claim 1, characterized by, the leakage protection operation comprises: controlling a fresh air system associated with the air conditioner to start.

3. The flammable refrigerant leakage control method according to claim 1, characterized by, the leakage protection operation comprises: controlling an indoor fan and / or an outdoor fan of the air conditioner to start and run for a set time length.

4. The flammable refrigerant leakage control method according to claim 3, characterized by, in the step of controlling the indoor fan and / or the outdoor fan of the air conditioner to start and run for the set time length: determining that the indoor fan and / or the outdoor fan is started, and adjusting the rotating speed of the indoor fan and / or the outdoor fan according to the difference between the actual saturation temperature and the standard saturation temperature; wherein the difference between the actual saturation temperature and the standard saturation temperature is positively correlated with the rotating speed of the indoor fan and / or the outdoor fan.

5. The flammable refrigerant leakage control method according to claim 3, characterized by, in the step of controlling the indoor fan and / or the outdoor fan of the air conditioner to start and run for the set time length: controlling the indoor fan and / or the outdoor fan to start at a minimum rotating speed, and determining the set time length according to the difference between the actual saturation temperature and the standard saturation temperature; wherein the difference between the actual saturation temperature and the standard saturation temperature is positively correlated with the set time length.

6. The flammable refrigerant leak control method according to any one of claims 1 to 5, characterized by, the step of controlling the air conditioner to perform the leakage protection operation according to that the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold value, and controlling the compressor to start after the leakage protection operation is completed, specifically comprises: controlling the air conditioner to send an alarm information to a user according to that the difference between the actual saturation temperature and the standard saturation temperature exceeds the set warning threshold value, and obtaining a control instruction issued by the user. determining that the control instruction is to stop, and controlling the air conditioner to stop; determining that the control instruction is to continue starting, and controlling the air conditioner to perform the leakage protection operation until a difference between the actual saturation temperature and the standard saturation temperature is less than or equal to the set warning threshold, and controlling the compressor to start.

7. The flammable refrigerant leak control method according to any one of claims 1 to 5, characterized by, The step of controlling the air conditioner to perform the leakage protection operation according to the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold, and controlling the compressor to start after the leakage protection operation is completed, specifically comprises: According to the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold, the detection concentration of the leaked refrigerant is obtained. determining that the detection concentration of the leaked refrigerant is greater than the set concentration, and controlling the air conditioner to stop; determining that the detection concentration of the leaked refrigerant is less than or equal to the set concentration, and controlling the air conditioner to perform the leakage protection operation, and controlling the compressor to start after the leakage protection operation is completed.

8. A combustible refrigerant leakage control device characterized by comprising: comprises: The acquisition module is configured to receive a starting instruction for starting the air conditioner, and acquire an indoor environment temperature and an outdoor environment temperature, and an actual saturation temperature corresponding to at least one of a low-pressure pressure and a high-pressure pressure of the compressor. The first control module is configured to determine a standard saturation temperature according to the indoor environment temperature and the outdoor environment temperature. The second control module is configured to generate an execution logic according to the actual saturation temperature and the standard saturation temperature, and control the operation of the compressor according to the execution logic. The step of generating the execution logic according to the actual saturation temperature and the standard saturation temperature, and controlling the operation of the compressor according to the execution logic, specifically comprises: controlling the compressor to start according to the difference between the actual saturation temperature and the standard saturation temperature not exceeding the set warning threshold; controlling the air conditioner to perform the leakage protection operation according to the difference between the actual saturation temperature and the standard saturation temperature exceeding the set warning threshold, and controlling the compressor to start after the leakage protection operation is completed. The step of determining the standard saturation temperature according to the indoor environment temperature and the outdoor environment temperature, specifically comprises: determining the standard saturation temperature as a first set temperature according to an absolute value of a difference between the indoor environment temperature and the outdoor environment temperature not exceeding a set difference value, the first set temperature being equal to the outdoor environment temperature; determining the standard saturation temperature as a second set temperature according to the absolute value of the difference between the indoor environment temperature Tai and the outdoor environment temperature Tao exceeding the set difference value, the second set temperature being: α×Tao+β×Tai, α and β being constants.

9. An air conditioner comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to implement the leakage control method of the flammable refrigerant according to any one of claims 1 to 7.

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