Refrigerant leakage control method and device, air conditioner and computer readable storage medium

Abstract

Embodiments of the present application provide a refrigerant leakage control method and device, an air conditioner and a computer readable storage medium, which are used for controlling an air conditioner. The air conditioner comprises a fresh air module. The refrigerant leakage control method comprises: determining whether refrigerant leakage occurs; in response to determining that refrigerant leakage occurs, performing the following leakage handling operation: controlling the air conditioner to perform a refrigerant recovery action to recover refrigerant in the air conditioner to an outdoor side; and in response to determining that a fresh air operation condition is met, controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a refrigerant leakage control method and device, an air conditioner and a computer readable storage medium. BACKGROUND

[0002] In the related art, new environmentally friendly refrigerants such as hydrocarbon refrigerants are increasingly used in air conditioners due to their good energy-saving and environmentally friendly properties. Common types include R290, R32, R487, etc. However, such new environmentally friendly refrigerants have high flammability and pose a significant safety risk. Air conditioners in the related art have a high risk of leakage, which can easily lead to leakage of flammable refrigerants on the indoor side. Moreover, there is no timely and reliable disposal after the leakage of flammable refrigerants, which seriously threatens the safety of people and property in the indoor environment. SUMMARY

[0003] The embodiments of the present application provide a refrigerant leakage control method and device, an air conditioner and a computer readable storage medium, which can timely handle refrigerant leakage and ensure the safety of people and property in the indoor environment.

[0004] In a first aspect, the embodiments of the present application provide a refrigerant leakage control method for controlling an air conditioner, the air conditioner comprising a fresh air module, the refrigerant leakage control method comprising: determining whether refrigerant leakage occurs; in response to determining that refrigerant leakage occurs, performing the following leakage disposal operation: controlling the air conditioner to perform a refrigerant recovery action to recover refrigerant in the air conditioner to the outdoor side; and in response to determining that a fresh air operation condition is met, controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module.

[0005] In some embodiments, controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module comprises: in response to determining that the fresh air module is a first fresh air module, controlling the fresh air module to inhale outdoor fresh air, the first fresh air module having no indoor dirty air inlet; in response to determining that the fresh air module is a second fresh air module, controlling the fresh air module to alternately exhaust indoor dirty air and inhale outdoor fresh air, the fresh air module having an indoor dirty air inlet and an outdoor exhaust outlet that are in communication with each other, the fresh air module exhausting indoor dirty air having a positive correlation with indoor refrigerant concentration, and the fresh air module inhaling outdoor fresh air having a negative correlation with indoor refrigerant concentration; and in response to determining that the fresh air module is a third fresh air module, controlling the fresh air module to synchronously exhaust indoor dirty air and inhale outdoor fresh air, the indoor dirty air inlet and the outdoor exhaust outlet being in communication, the third fresh air module having an indoor dirty air inlet, an outdoor fresh air inlet and an outdoor exhaust outlet, the outdoor fresh air inlet being isolated from the indoor dirty air inlet and the outdoor exhaust outlet, respectively.

[0006] In some embodiments, the air conditioner comprises an indoor air sweeping mechanism and an indoor air fan, and the leakage handling operation comprises: controlling the indoor air fan to operate at a preset rotating speed, and controlling the indoor air sweeping mechanism to sweep air at preset air sweeping parameters.

[0007] In some embodiments, the refrigerant in the air conditioner is a flammable refrigerant; the leakage handling operation comprises: determining whether combustion occurs in an indoor environment; in response to determining that combustion occurs in the indoor environment, determining that the fresh air operation condition is not satisfied; in response to determining that combustion does not occur in the indoor environment, determining that the fresh air operation condition is satisfied.

[0008] In some embodiments, determining whether refrigerant leakage occurs comprises: determining whether a preset leakage condition is satisfied, the preset leakage condition comprising any one of the following conditions: the indoor refrigerant concentration is greater than a preset concentration, the compressor discharge pressure is less than a preset discharge pressure, and the refrigerant leakage ratio is greater than a preset leakage ratio; in response to determining that the preset leakage condition is satisfied, determining that refrigerant leakage occurs; in response to determining that the preset leakage condition is not satisfied, determining that refrigerant leakage does not occur.

[0009] In some embodiments, the preset leakage condition comprises that the refrigerant leakage ratio is greater than a preset leakage ratio; determining whether the preset leakage condition is satisfied comprises: determining the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner according to a prediction model; determining the refrigerant leakage ratio according to the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner; determining whether the refrigerant leakage ratio is greater than the preset leakage ratio; in response to determining that the refrigerant leakage ratio is greater than the preset leakage ratio, determining that the preset leakage condition is satisfied.

[0010] In some embodiments, the refrigerant leakage control method comprises: in response to determining that refrigerant leakage does not occur and receiving a shutdown instruction, controlling the air conditioner to perform the refrigerant recovery action.

[0011] In some embodiments, the refrigerant recovery action comprises: in response to the air conditioner being in a heating mode, performing the following operations: controlling the compressor to stop and controlling the electronic expansion valve to operate at a maximum opening degree; after the electronic expansion valve operates at the maximum opening degree for a first preset time, controlling the electronic expansion valve to close; in response to the air conditioner being in a cooling mode, controlling the electronic expansion valve to close and controlling the compressor to stop immediately or to stop after a delay.

[0012] In a second aspect, the embodiments of the present application provide a refrigerant leakage control device, comprising: a leakage judgment circuit configured to determine whether refrigerant leakage occurs; a leakage processing circuit configured to, in response to determining that refrigerant leakage occurs, perform the following leakage handling operation: controlling the air conditioner to perform a refrigerant recovery action to recover refrigerant in the air conditioner to an outdoor side; and in response to determining that a fresh air operation condition is satisfied, controlling a fresh air module to perform a corresponding fresh air mode according to a type of the fresh air module.

[0013] In a third aspect, the embodiments of the present application provide an air conditioner, comprising: a fresh air module; a memory, which stores a computer program; and a processor, which executes the computer program to implement the refrigerant leakage control method according to any one of the above embodiments.

[0014] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program is loaded by a processor to execute the steps of the refrigerant leakage control method described above.

[0015] The refrigerant leakage control method provided by the embodiments of the present application can, when determining that refrigerant leakage occurs, recover the refrigerant in the air conditioner to the outdoor side through refrigerant recovery action, avoid further refrigerant leakage in the indoor side, and control the fresh air module to execute a corresponding fresh air mode according to the type of the fresh air module when the fresh air operation condition is met, so as to utilize the fresh air function of the fresh air module to the greatest extent and at least utilize outdoor fresh air to reduce the indoor refrigerant concentration, thereby ensuring the personal and property safety of the indoor environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a flowchart of the refrigerant leakage control method provided by some embodiments of the present application;

[0018] Figure 2 is a partial flowchart of the refrigerant leakage control method provided by some embodiments of the present application;

[0019] Figure 3 is another partial flowchart of the refrigerant leakage control method provided by some embodiments of the present application;

[0020] Figure 4 is another partial flowchart of the refrigerant leakage control method provided by some embodiments of the present application;

[0021] Figure 5 is another partial flowchart of the refrigerant leakage control method provided by some embodiments of the present application;

[0022] Figure 6 is another partial flowchart of the refrigerant leakage control method provided by some embodiments of the present application;

[0023] Figure 7is another partial flow chart of the refrigerant leakage control method provided by some embodiments of the present application;

[0024] Figure 8 is a structure diagram of a prediction model of the refrigerant leakage control method provided by some embodiments of the present application;

[0025] Figure 9 is a structure diagram of an air conditioner provided by some embodiments of the present application.

[0026] Main element symbol explanation:

[0027] 1-air conditioner, 10-processor, 20-memory. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0031] The use of "adapted for" or "configured for" in the present application means open and inclusive language that does not exclude devices adapted for or configured for performing additional tasks or steps. In addition, the use of "based on" means open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or values beyond those stated in practice.

[0032] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. Details are set forth in the following description for purpose of explanation. It should be appreciated that one of ordinary skill in the art would realize that the application can be practiced without the use of these specific details. In other instances, well known structures and processes are not elaborated as details of such structures and processes can be found in other sources. Thus, the present application is not intended to be limited by the embodiments shown, but is to be accorded with the full scope consistent with the principles and features disclosed herein.

[0033] As shown in Figure 1 In a first aspect, embodiments of the present application provide a refrigerant leakage control method for controlling an air conditioner 1; the air conditioner 1 includes a fresh air module that can at least suck outdoor fresh air into an indoor environment. The refrigerant leakage control method includes S10-S20, which can timely handle refrigerant leakage to ensure the safety of persons and property in the indoor environment.

[0034] S10: Determine whether refrigerant leakage occurs. The specific determination method for refrigerant leakage can be determined according to actual needs, which can be determined by detecting, for example, a refrigerant concentration detection device, or estimated by, for example, a refrigerant leakage estimation algorithm, and the embodiments of the present application do not limit this.

[0035] S20: In response to determining that refrigerant leakage occurs, the following leakage handling operations such as S21-S22 are performed.

[0036] S21: Control the air conditioner 1 to perform a refrigerant recovery action to recover the refrigerant in the air conditioner 1 to the outdoor side. When the air conditioner 1 performs the refrigerant recovery action, the air conditioner 1 temporarily stops refrigeration and heating, and the refrigerant stops circulating and flowing to be recovered to the outdoor side. In this way, all or at least most of the refrigerant is recovered and stored on the outdoor side, and almost no refrigerant remains on the indoor side or only a small amount of refrigerant within a safe range remains on the indoor side, avoiding further refrigerant leakage on the indoor side.

[0037] S22: in response to determining that the fresh air operation condition is met, controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module, so as to reduce the indoor refrigerant concentration. The specific manner of determining whether the fresh air operation condition is met can be determined according to actual needs, and the embodiments of the present application do not limit this. Here, due to the different types, the fresh air functions of the fresh air modules are also different, so that the fresh air modes performed by the fresh air modules of different types are also different. For example, some fresh air modules only have the function of inhaling outdoor fresh air, but do not have the function of discharging indoor dirty air to the outdoor environment, so the fresh air mode performed by the fresh air module of this type can be controlled to be inhaling outdoor fresh air. For another example, some fresh air modules have the functions of inhaling outdoor fresh air and discharging indoor dirty air, but cannot perform the functions of inhaling outdoor fresh air and discharging indoor dirty air at the same time, but can perform the functions of inhaling outdoor fresh air and discharging indoor dirty air at different times, so the fresh air mode performed by the fresh air module of this type can be controlled to be alternately discharging indoor dirty air and inhaling outdoor fresh air. For another example, some fresh air modules have the functions of inhaling outdoor fresh air and discharging indoor dirty air, and can perform the functions of inhaling outdoor fresh air and discharging indoor dirty air at the same time, so the fresh air mode performed by the fresh air module of this type can be controlled to be simultaneously discharging indoor dirty air and inhaling outdoor fresh air.

[0038] Compared with the related art, the refrigerant leakage control method provided by the embodiments of the present application can, when it is determined that refrigerant leakage occurs, on the one hand, recover the refrigerant in the air conditioner 1 to the outdoor side through the refrigerant recovery action, so as to avoid further refrigerant leakage in the indoor side, and on the other hand, when the fresh air operation condition is met, control the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module, so as to utilize the fresh air function of the fresh air module to the greatest extent, and at least utilize the outdoor fresh air to reduce the indoor refrigerant concentration, thereby ensuring the safety of persons and property in the indoor environment.

[0039] In some embodiments, the type of the fresh air module can be a first fresh air module, a second fresh air module or a third fresh air module. The first fresh air module has an outdoor fresh air inlet but does not have an indoor dirty air inlet, so that the first fresh air module can only inhale outdoor fresh air but cannot discharge indoor dirty air; the second fresh air module has an indoor dirty air inlet and an outdoor exhaust outlet that are in communication with each other, and can inhale outdoor fresh air and discharge indoor dirty air through the outdoor exhaust outlet at different times, but cannot inhale outdoor fresh air and discharge indoor dirty air at the same time; the third fresh air module has an indoor dirty air inlet, an outdoor fresh air inlet and an outdoor exhaust outlet, the outdoor fresh air inlet is isolated from the indoor dirty air inlet and the outdoor exhaust outlet, and the indoor dirty air inlet and the outdoor exhaust outlet are in communication, so that on the one hand, the third fresh air module can inhale outdoor fresh air through the outdoor fresh air inlet, and on the other hand, the third fresh air module can discharge indoor dirty air to the outdoor environment through the indoor dirty air inlet and the outdoor exhaust outlet, so that the third fresh air module can inhale outdoor fresh air and discharge indoor dirty air at the same time. As shown in FIG. 2, S22 can include S221-S223. Figure 2

[0040] ​S221: In response to determining that the fresh air module is the first fresh air module, controlling the fresh air module to inhale outdoor fresh air.

[0041] S222: In response to determining that the fresh air module is the second fresh air module, controlling the fresh air module to alternately exhaust indoor dirty air and inhale outdoor fresh air. In other words, the fresh air module can be alternately switched between exhausting indoor dirty air and inhaling outdoor fresh air, and the time interval between the fresh air module entering the exhaust of indoor dirty air and switching to the inhale of outdoor fresh air is the operation time of the fresh air module for exhausting indoor dirty air, and the time interval between the fresh air module entering the inhale of outdoor fresh air and switching to the exhaust of indoor dirty air is the operation time of the fresh air module for inhaling outdoor fresh air. Here, the operation time of the fresh air module for exhausting indoor dirty air and the operation time of the fresh air module for inhaling outdoor fresh air can be determined according to actual needs, which is not limited in the embodiments of the present application.

[0042] In some examples, the operation time of the fresh air module for exhausting indoor dirty air can be set to be positively correlated with the indoor refrigerant concentration, and the operation time of the fresh air module for inhaling outdoor fresh air can be set to be negatively correlated with the indoor refrigerant concentration. In other words, if the indoor refrigerant concentration is high, the operation time of the fresh air module for exhausting indoor dirty air is long, and the operation time of the fresh air module for inhaling outdoor fresh air is short, so that at least most of the leaked refrigerant can be quickly exhausted to the outdoor environment in a short time; on the contrary, if the indoor refrigerant concentration is low and within the refrigerant leakage range, the operation time of the fresh air module for exhausting indoor dirty air is short, and the operation time of the fresh air module for inhaling outdoor fresh air is long.

[0043] For example, the operation time of the fresh air module for exhausting indoor dirty air and the indoor refrigerant concentration can have a corresponding calculation equation, and the operation time of the fresh air module for inhaling outdoor fresh air and the indoor refrigerant concentration can have a corresponding calculation equation, so that the operation time of the fresh air module for exhausting indoor dirty air and the operation time of the fresh air module for inhaling outdoor fresh air directly change with the numerical value change of the indoor refrigerant concentration.

[0044] For example, a plurality of continuously distributed refrigerant concentration intervals can be established in advance, and different operation times for exhausting indoor dirty air and inhaling outdoor fresh air are set for each refrigerant concentration interval. For a refrigerant concentration interval with a large numerical value, the operation time for exhausting indoor dirty air set for the refrigerant concentration interval has a large numerical value, and the operation time for inhaling outdoor fresh air set for the refrigerant concentration interval has a small numerical value; for a refrigerant concentration interval with a small numerical value, the operation time for exhausting indoor dirty air set for the refrigerant concentration interval has a small numerical value, and the operation time for inhaling outdoor fresh air set for the refrigerant concentration interval has a large numerical value.

[0045] For example, at least three refrigerant concentration intervals can be set. The at least three refrigerant concentration intervals are respectively a first refrigerant concentration interval less than or equal to a first concentration threshold, a second refrigerant concentration interval greater than the first concentration threshold and less than or equal to a second concentration threshold, and a third refrigerant concentration interval greater than the second concentration threshold. The first concentration threshold is less than the second concentration threshold. For example, the operation time of the fresh air module for discharging indoor dirty air corresponding to the first refrigerant concentration interval, the operation time of the fresh air module for discharging indoor dirty air corresponding to the second refrigerant concentration interval, and the operation time of the fresh air module for discharging indoor dirty air corresponding to the third refrigerant concentration interval are sequentially increased, so that the operation time of the fresh air module for discharging indoor dirty air and the indoor refrigerant concentration are in a positive correlation; the operation time of the fresh air module for inhaling outdoor fresh air corresponding to the first refrigerant concentration interval, the operation time of the fresh air module for inhaling outdoor fresh air corresponding to the second refrigerant concentration interval, and the operation time of the fresh air module for inhaling outdoor fresh air corresponding to the third refrigerant concentration interval are sequentially decreased, so that the operation time of the fresh air module for inhaling outdoor fresh air and the indoor refrigerant concentration are in a negative correlation.

[0046] S223: In response to determining that the fresh air module is the third fresh air module, controlling the fresh air module to simultaneously discharge indoor dirty air and inhale outdoor fresh air.

[0047] By setting S221-S223, the fresh air function of the fresh air module can be used to the greatest extent according to the type of the fresh air module, so as to at least use outdoor fresh air to reduce the indoor refrigerant concentration, and when the fresh air module has an exhaust function, the indoor dirty air is discharged to the outdoor environment at different times or simultaneously, so as to quickly reduce the refrigerant concentration of the indoor environment, thereby ensuring the safety of persons and property in the indoor environment.

[0048] In some embodiments, the air conditioner 1 can include an indoor air sweeping mechanism and an indoor fan, the indoor fan can be arranged in the indoor air duct, and the indoor air sweeping mechanism can be arranged at the indoor air outlet. In some examples, the indoor air sweeping mechanism can include an air sweeping blade. Figure 3 As shown, the leakage handling operation in S20 can include S23.

[0049] S23: Control the indoor fan to operate at a preset rotating speed, and control the indoor air sweeping mechanism to sweep air at a preset air sweeping parameter. Here, the specific value of the preset rotating speed can be preset according to actual needs, for example, it can be the maximum rotating speed or other preferred rotating speed of the indoor fan, and the present application embodiment does not limit this. Here, the preset air sweeping parameter can include at least one of the air sweeping angle, the air sweeping rotating speed and the like; the specific value of the preset air sweeping parameter can be preset according to actual needs, for example, it can be the maximum air sweeping angle, the maximum air sweeping rotating speed and the like, and the present application embodiment does not limit this.

[0050] By setting S23, the indoor return air and the outdoor fresh air sucked in by the outdoor fresh air module can be sucked into the indoor air duct together and blown to the indoor air outlet, and then the indoor air sweeping mechanism is used for rapid air sweeping to blow the mixed air containing outdoor fresh air to more areas in the indoor environment and accelerate the flow and diffusion of indoor air, thereby avoiding the leakage of refrigerant gathering in a small area and rapidly reducing the refrigerant concentration in the indoor environment.

[0051] In some embodiments, the refrigerant in the air conditioner 1 can be a flammable refrigerant. As shown in the figure, the leakage handling operation in S20 can include S2021-S2023 to determine whether the fresh air operation condition is met. Figure 4

[0052] S2021: Determine whether the indoor environment is on fire. As an example, whether the indoor environment is on fire can be determined by measuring in real time by a smoke sensor arranged on the indoor side of the air conditioner 1 or a smoke sensor arranged in the indoor environment.

[0053] S2022: In response to determining that the indoor environment is on fire, it is determined that the fresh air operation condition is not met. If the fresh air module has not been opened at this time, the fresh air module can be controlled not to be opened, or the fresh air module with the exhaust function can be controlled to only open the function of exhausting indoor dirty air but not to open the function of sucking outdoor fresh air, so as to avoid increasing the circulation of indoor oxygen and reducing the risk of fire retardation. If the fresh air module is in the fresh air mode at this time, the fresh air module can be controlled to stop sucking outdoor fresh air, for example, the fresh air module can be controlled to stop, or the fresh air module with the exhaust function can be controlled to only open the function of exhausting indoor dirty air but close the function of sucking outdoor fresh air, so as to avoid increasing the circulation of indoor oxygen and reducing the risk of fire retardation.

[0054] S2023: In response to determining that the indoor environment is not on fire, it is determined that the fresh air operation condition is met. If the fresh air module has not been opened at this time, the fresh air module can be controlled to be opened and execute the corresponding fresh air mode; if the fresh air module is in the fresh air mode at this time, the fresh air module can be controlled to continue to execute the corresponding fresh air mode.

[0055] Here, S2021-S2023 can be executed before or after S22, and the present application embodiment does not limit this. By setting S2021-S2023, the combustion risk can be judged before the fresh air mode is opened and / or during the operation of the fresh air module, so as to timely prevent the fresh air mode from being opened or quickly close the fresh air mode when the combustion risk occurs, avoid aggravating the combustion risk, and improve the indoor safety.

[0056] As shown in the figure, in some embodiments, S10 can include S11-S13. Figure 5

[0057] ​​S11: determining whether a preset leakage condition is met. Here, the preset leakage condition can include any one of the following conditions: the indoor refrigerant concentration is greater than a preset concentration, the compressor discharge pressure is less than a preset discharge pressure, and the refrigerant leakage ratio is greater than a preset leakage ratio. As long as any one of the conditions is met, it can be determined that the preset leakage condition is met. Here, the preset concentration, the preset discharge pressure, and the preset leakage ratio can be determined according to actual needs, and embodiments of the present application do not limit the same.

[0058] S12: in response to determining that the preset leakage condition is met, determining that refrigerant leakage occurs. For example, if the indoor refrigerant concentration is greater than the preset concentration, it can be determined that the preset leakage condition is met, and thus it can be determined that refrigerant leakage occurs. For another example, if the compressor discharge pressure is less than the preset discharge pressure, it can be determined that the preset leakage condition is met, and thus it can be determined that refrigerant leakage occurs. For still another example, if the refrigerant leakage ratio is greater than the preset leakage ratio, it can be determined that the preset leakage condition is met, and thus it can be determined that refrigerant leakage occurs.

[0059] S13: in response to determining that the preset leakage condition is not met, determining that refrigerant leakage does not occur.

[0060] In some examples, the preset leakage condition can include that the refrigerant leakage ratio is greater than the preset leakage ratio. As shown in FIG. 1, S11 can include S111-S114. Figure 6

[0061] S111: determining the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner 1 according to a prediction model.

[0062] Here, the prediction model can be pre-set in the control system of the air conditioner 1, and one or more of, for example, an indoor temperature, an indoor humidity / outdoor humidity, an outdoor temperature, and one or more of, for example, a compressor operating frequency, a compressor discharge temperature, an indoor coil temperature, and an outdoor coil temperature can be taken as input variables of the prediction model, and the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner 1 can be taken as at least two output variables of the prediction model. After determining the actual values of the input variables, the actual values can be input into the prediction model, so as to obtain the calculated values of the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner 1.

[0063] For example, the prediction model can be a mathematical model, and the input variables and the output variables of the prediction model can be determined according to the mathematical model. Figure 8 ​As shown, the exemplary prediction model can be an artificial neural network prediction model. The input layer of the artificial neural network prediction model can include indoor temperature, indoor humidity / outdoor humidity, outdoor temperature, compressor operating frequency, compressor discharge temperature, indoor coil temperature, and outdoor coil temperature, and the output layer of the artificial neural network prediction model can include standard discharge pressure of the compressor and estimated refrigerant amount of the air conditioner 1. Before use, historical operating data such as indoor temperature, indoor humidity / outdoor humidity, outdoor temperature, compressor operating frequency, compressor discharge temperature, indoor coil temperature, and outdoor coil temperature can be used as sample data to train the model based on the artificial neural network to obtain the artificial neural network prediction model.

[0064] S112: Determine the refrigerant leakage ratio based on the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner 1. Here, the calculation method for determining the refrigerant leakage ratio based on the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner 1 can be determined according to actual needs, which is not limited by the embodiments of the present application. Exemplarily, the refrigerant leakage ratio can be determined by the following calculation formula:

[0065]

[0066] wherein c0 is the refrigerant leakage ratio, c1 is an empirical coefficient, b 实际排气压力 is the measured value of the compressor discharge pressure, which can be measured by a pressure sensor arranged at the compressor discharge port, b 标准排气压力 is the standard discharge pressure of the compressor, which can be determined by the prediction model of S111, L 预估冷媒量 is the estimated refrigerant amount of the air conditioner 1, which can be determined by the prediction model of S111, L 标准冷媒量 is the standard refrigerant amount of the air conditioner 1.

[0067] S113: Determine whether the refrigerant leakage ratio is greater than the preset leakage ratio. Here, the preset leakage ratio can be pre-set in the control system of the air conditioner 1, which is used as a threshold for determining whether refrigerant leakage occurs.

[0068] S114: In response to determining that the refrigerant leakage ratio is greater than the preset leakage ratio, determine that the preset leakage condition is met.

[0069] By setting S111-S114, whether refrigerant leakage occurs can be more accurately determined, so that leakage disposal operation can be performed in time when refrigerant leakage occurs.

[0070] In some embodiments, the refrigerant leakage control method can include S40.

[0071] S40: In response to determining that no refrigerant leak has occurred and receiving a shutdown command, control the air conditioner 1 to perform a refrigerant recovery operation. Here, the specific steps of the refrigerant recovery operation in S40 can be the same as those in S21. Thus, when no refrigerant leak has occurred, if it is necessary to shut down the air conditioner 1, the refrigerant can be recovered to the outdoor side through the refrigerant recovery operation. This ensures that all or at least most of the refrigerant is recovered and stored on the outdoor side, leaving almost no refrigerant on the indoor side or only a small amount within a safe range, reducing the risk of refrigerant leakage hazards on the indoor side.

[0072] like Figure 7 As shown, in some embodiments, the refrigerant recovery action in S21 or S40 may include S204 to S205.

[0073] S204: In response to the air conditioner 1 being in heating mode, the following operations are performed as in S2041 to S2042.

[0074] S2041: Controls the compressor to stop and controls the electronic expansion valve to operate at its maximum opening. During this process, the reversing valve in air conditioner 1 does not reverse, ensuring that the refrigerant flow direction in air conditioner 1 remains consistent with the flow direction corresponding to the heating mode. During this process, the compressor no longer discharges gas, and the refrigerant remaining on the indoor side flows from the indoor heat exchanger to the outdoor heat exchanger through the electronic expansion valve, allowing all or at least most of the refrigerant to be recovered and stored on the outdoor side. Because the electronic expansion valve operates at its maximum opening, the refrigerant can be quickly recovered to the outdoor side.

[0075] S2042: After the electronic expansion valve has been operating at its maximum opening for a first preset time, the electronic expansion valve is controlled to close. Here, the first preset time can be pre-set in the control system of the air conditioner 1. After the electronic expansion valve has been operating at its maximum opening for the first preset time, it can be assumed that all or at least most of the refrigerant has been recovered to the outdoor side. Even if a small amount of refrigerant remains on the indoor side, this small amount is within a safe range and will not cause leakage hazards on the indoor side. At this time, the electronic expansion valve can be controlled to close to, for example, its minimum opening of zero, so that the exchange between the outdoor and indoor sides is cut off, and no more refrigerant exchange occurs, or only a very slight refrigerant exchange occurs, thereby ensuring the safety of the indoor environment.

[0076] S205: In response to the air conditioner 1 being in cooling mode, control the electronic expansion valve to close and control the compressor to stop immediately or stop after a delay. Here, upon receiving a stop command, the electronic expansion valve can be controlled to close immediately to, for example, the minimum opening of zero, and the compressor will stop immediately, using the residual pressure difference to recover most of the refrigerant to the outdoor side; or, the compressor can be controlled to stop after a delay, using the pressure provided by the compressor to recover all or most of the refrigerant to the outdoor side.

[0077] In a second aspect, the embodiments of the present application provide a refrigerant leakage control device, comprising: a leakage judgment circuit configured to determine whether a refrigerant leakage occurs; and a leakage processing circuit configured to, in response to a determination that the refrigerant leakage occurs, perform the following leakage handling operation: control the air conditioner 1 to perform a refrigerant recovery action to recover the refrigerant in the air conditioner 1 to an outdoor side; and control the fresh air module to perform a corresponding fresh air mode according to a type of the fresh air module to reduce an indoor refrigerant concentration.

[0078] As shown in Figure 9 In a third aspect, the embodiments of the present application provide an air conditioner 1, which comprises a fresh air module, a memory and a processor. The memory stores a computer program, and the computer program is executed by the processor to implement the refrigerant leakage control method provided in any of the above embodiments.

[0079] The type of the fresh air module can be determined according to actual needs, and one of the above-mentioned first fresh air module, second fresh air module and third fresh air module can be used, and a corresponding fresh air mode is set.

[0080] The processor 10 is connected to the memory 20 and can perform various actions and processes according to the program stored in the memory 20. Specifically, the processor 10 can be an integrated circuit chip with signal processing capability. The processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a ready-to-program gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, and can be of X86 architecture or ARM architecture.

[0081] The memory 20 can be volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory can be read only memory (ROM), programmable read only memory (PROM), erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as external cache. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SynchBurst Dynamic Random Access Memory (SLDRAM), and Direct Rambus Dynamic Random Access Memory (DRRAM). Note that the memory 20 of the methods described herein is intended to include, without being limited to, these and any other suitable types of memory.

[0082] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program. The computer program is loaded by a processor 10 to execute the steps in the control method of any of the above embodiments.

[0083] By way of example, and not limitation, such computer-readable storage media can include volatile memory, non-volatile memory, flash memory, or memoiy cards, etc. It should be noted that the computer-readable storage media expressed herein can include, but are not limited to, the following: a magnetic storage device (e.g., hard disk, floppy disk, or tape), an optical storage device (e.g., compact disc (CD), a digital versatile disc (DVD), etc.), a smart card, and a flash memory device (e.g., EPROM, card, stick, or key drive, etc.). The various computer-readable storage media described herein can represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage media" can include, without being limited to, a wireless channel and various other media capable of storing, containing, and / or carrying instruction(s) and / or data.

[0084] The above describes in detail a refrigerant leakage control method, device, air conditioner and computer readable storage medium provided by the embodiments of the present application. The principles and implementation manners of the present application are described by using specific examples in this paper. The above embodiment is only used to help understand the method and core idea of the present application. Meanwhile, according to the idea of the present application, the specific implementation manner and application range will be changed by those skilled in the art. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A refrigerant leakage control method characterized by comprising: The application relates to a refrigerant leakage control method for controlling an air conditioner, wherein the air conditioner comprises a fresh air module. Determining whether refrigerant leakage occurs; In response to determining that refrigerant leakage occurs, performing the following leakage handling operation: Controlling the air conditioner to perform a refrigerant recovery action to recover refrigerant in the air conditioner to an outdoor side; In response to determining that a fresh air operation condition is met, controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module; Controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module, comprising: In response to determining that the fresh air module is a first fresh air module, controlling the first fresh air module to suck in outdoor fresh air, wherein the first fresh air module does not have an indoor dirty air inlet; In response to determining that the fresh air module is a second fresh air module, controlling the second fresh air module to alternately discharge indoor dirty air and suck in outdoor fresh air, wherein the second fresh air module has an indoor dirty air inlet and an outdoor exhaust air outlet that are in communication with each other; In response to determining that the fresh air module is a third fresh air module, controlling the third fresh air module to synchronously discharge indoor dirty air and suck in outdoor fresh air, wherein the indoor dirty air inlet and the outdoor exhaust air outlet are in communication, the third fresh air module has an indoor dirty air inlet, an outdoor fresh air inlet and an outdoor exhaust air outlet, and the outdoor fresh air inlet is isolated from the indoor dirty air inlet and the outdoor exhaust air outlet, respectively.

2. The refrigerant leakage control method according to claim 1, characterized by, When the second fresh air module is controlled to alternately discharge indoor dirty air and suck in outdoor fresh air, the operation time of the second fresh air module for discharging indoor dirty air is positively correlated with the indoor refrigerant concentration, and the operation time of the second fresh air module for sucking in outdoor fresh air is negatively correlated with the indoor refrigerant concentration.

3. The refrigerant leakage control method according to claim 1, characterized by, The air conditioner comprises an indoor air sweeping mechanism and an indoor air fan; and the leakage handling operation comprises: Controlling the indoor air fan to operate at a preset rotating speed and controlling the indoor air sweeping mechanism to sweep air according to preset air sweeping parameters.

4. The refrigerant leakage control method according to claim 1, characterized by The refrigerant in the air conditioner is combustible refrigerant; and the leakage handling operation comprises: Determining whether combustion occurs in an indoor environment; In response to determining that combustion occurs in the indoor environment, determining that the fresh air operation condition is not met; In response to determining that combustion does not occur in the indoor environment, determining that the fresh air operation condition is met.

5. The refrigerant leakage control method according to claim 1, characterized by Determining whether refrigerant leakage occurs, comprising: Determining whether a preset leakage condition is met, wherein the preset leakage condition comprises any one of the following conditions: the indoor refrigerant concentration is greater than a preset concentration, the compressor discharge pressure is less than a preset discharge pressure, and the refrigerant leakage ratio is greater than a preset leakage ratio; In response to determining that the preset leakage condition is met, determining that refrigerant leakage occurs; In response to determining that the preset leakage condition is not met, determining that refrigerant leakage does not occur.

6. The refrigerant leakage control method according to claim 5, characterized by The preset leakage condition comprises that the refrigerant leakage ratio is greater than a preset leakage ratio; and determining whether the preset leakage condition is met, comprising: Determining the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner according to a prediction model; Determining the refrigerant leakage ratio according to the standard discharge pressure of the compressor and the estimated refrigerant amount of the air conditioner; Determining whether the refrigerant leakage ratio is greater than a preset leakage ratio; In response to determining that the refrigerant leakage ratio is greater than a preset leakage ratio, determining that the preset leakage condition is met.

7. The refrigerant leakage control method according to claim 1, characterized by, Comprising: In response to determining that no refrigerant leakage occurs and receiving a shutdown instruction, the air conditioner is controlled to perform the refrigerant recovery action.

8. The refrigerant leakage control method according to claim 1 or 7, characterized by, The refrigerant recovery action includes: In response to the air conditioner being in a heating mode, the following operations are performed: The compressor is controlled to stop, and the electronic expansion valve is controlled to run at a maximum opening; After the electronic expansion valve runs at the maximum opening for a first preset time, the electronic expansion valve is controlled to close; In response to the air conditioner being in a cooling mode, the electronic expansion valve is controlled to close, and the compressor is controlled to stop immediately or with a delay.

9. A refrigerant leakage control device characterized by comprising: For controlling an air conditioner, the air conditioner includes a fresh air module, and the refrigerant leakage control device includes: A leakage judgment circuit configured to determine whether refrigerant leakage occurs; A leakage processing circuit configured to, in response to determining that refrigerant leakage occurs, perform the following leakage disposal operation: The air conditioner is controlled to perform a refrigerant recovery action to recover refrigerant in the air conditioner to an outdoor side; In response to determining that a fresh air operation condition is met, the fresh air module is controlled to perform a corresponding fresh air mode according to the type of the fresh air module; Controlling the fresh air module to perform a corresponding fresh air mode according to the type of the fresh air module includes: In response to determining that the fresh air module is a first fresh air module, the first fresh air module is controlled to suck in outdoor fresh air, and the first fresh air module does not have an indoor dirty air inlet; In response to determining that the fresh air module is a second fresh air module, the second fresh air module is controlled to alternately exhaust indoor dirty air and suck in outdoor fresh air, and the second fresh air module has an indoor dirty air inlet and an outdoor exhaust outlet that are in communication with each other; In response to determining that the fresh air module is a third fresh air module, the third fresh air module is controlled to synchronously exhaust indoor dirty air and suck in outdoor fresh air, and the indoor dirty air inlet and the outdoor exhaust outlet are in communication, the third fresh air module has an indoor dirty air inlet, an outdoor fresh air inlet, and an outdoor exhaust outlet, and the outdoor fresh air inlet is isolated from the indoor dirty air inlet and the outdoor exhaust outlet, respectively.

10. An air conditioner characterized by comprising: Comprise: A fresh air module; A memory storing a computer program; A processor, the computer program being executed by the processor to implement the refrigerant leakage control method according to any one of claims 1 to 8.

11. A computer readable storage medium, characterized in that, A computer program is stored thereon, and the computer program is loaded by a processor to perform the steps in the refrigerant leakage control method according to any one of claims 1 to 8.

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