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

Abstract

The embodiment of the invention provides a refrigerant leakage control method and device, an air conditioner and a computer readable storage medium, the refrigerant leakage control method and device are used for controlling the air conditioner, the air conditioner comprises a fresh air module, and the refrigerant leakage control method comprises the steps that whether refrigerant leakage occurs or not is determined; in response to determining that refrigerant leakage occurs, the following leakage disposal operations are carried out: the air conditioner is controlled to execute a refrigerant recovery action, so that a refrigerant in the air conditioner is recovered to the outdoor side; and in response to determining that the fresh air operation condition is met, the fresh air module is controlled to execute 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, and in particular to a refrigerant leakage control method, device, air conditioner and computer-readable storage medium. Background Art

[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 environmental protection characteristics. Common types include R290, R32, R487, etc. However, such new environmentally friendly refrigerants are highly flammable and pose a great safety risk. The air conditioners in the related art have a great leakage hazard, which can easily cause the flammable refrigerant to leak indoors, and after the flammable refrigerant leaks, it cannot be handled promptly and reliably, which seriously threatens the personal and property safety of the indoor environment. Summary of the invention

[0003] The embodiments of the present application provide a refrigerant leakage control method, device, air conditioner and computer-readable storage medium, which can promptly handle refrigerant leakage after it occurs, thereby ensuring the personal and property safety of the indoor environment.

[0004] In a first aspect, an embodiment of the present application provides a refrigerant leakage control method for controlling an air conditioner, wherein the air conditioner includes a fresh air module, and the refrigerant leakage control method includes: determining whether a refrigerant leakage occurs; in response to determining that a refrigerant leakage occurs, performing the following leakage handling operations: controlling the air conditioner to execute a refrigerant recovery action to recover the refrigerant in the air conditioner to the outdoor side; in response to determining that the fresh air operation conditions are met, controlling the fresh air module to execute a corresponding fresh air mode according to the type of the fresh air module.

[0005] In some embodiments, the fresh air module is controlled to execute a corresponding fresh air mode according to the type of the fresh air module, including: 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, and the first fresh air module does not have an indoor polluted air inlet; in response to determining that the fresh air module is a second fresh air module, controlling the fresh air module to alternately discharge indoor polluted air and inhale outdoor fresh air, the operating time of the fresh air module to discharge indoor polluted air is positively correlated with the indoor refrigerant concentration, and the operating time of the fresh air module to inhale outdoor fresh air is negatively correlated with the indoor refrigerant concentration, and the second fresh air module has an indoor polluted air inlet and an outdoor exhaust outlet that are interconnected; in response to determining that the fresh air module is a third fresh air module, controlling the fresh air module to synchronously discharge indoor polluted air and inhale outdoor fresh air, the indoor polluted air inlet is connected to the outdoor exhaust outlet, and the third fresh air module has an indoor polluted air inlet, an outdoor fresh air inlet and an outdoor exhaust outlet, and the outdoor fresh air inlet is isolated from the indoor polluted air inlet and the outdoor exhaust outlet, respectively.

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

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

[0008] In some embodiments, determining whether a refrigerant leakage has occurred includes: determining whether a preset leakage condition is met, the preset leakage condition including any one of the following conditions: the indoor refrigerant concentration is greater than a preset concentration, the compressor exhaust pressure is less than a preset exhaust 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 a refrigerant leakage has occurred; in response to determining that the preset leakage condition is not met, determining that a refrigerant leakage has not occurred.

[0009] In some embodiments, the preset leakage condition includes a refrigerant leakage ratio greater than a preset leakage ratio; determining whether the preset leakage condition is met includes: determining a standard exhaust pressure of the compressor and an estimated refrigerant quantity of the air conditioner according to a prediction model; determining the refrigerant leakage ratio according to the standard exhaust pressure of the compressor and the estimated refrigerant quantity 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 the preset leakage ratio, determining that the preset leakage condition is met.

[0010] In some embodiments, the refrigerant leakage control method includes: in response to determining that no refrigerant leakage has occurred and receiving a shutdown instruction, controlling the air conditioner to perform the refrigerant recovery action.

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

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

[0013] In a third aspect, an embodiment of the present application provides an air conditioner, comprising: a fresh air module; a memory storing a computer program; and a processor, wherein the computer program, when executed by the processor, implements the refrigerant leakage control method as described in any of the above embodiments.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is loaded by a processor to execute the steps in the refrigerant leakage control method described above.

[0015] The refrigerant leakage control method provided in the embodiment of the present application can, when determining that a refrigerant leakage has occurred, on the one hand recover the refrigerant in the air conditioner to the outdoor side through the refrigerant recovery action to avoid further leakage of the refrigerant on the indoor side; on the other hand, when the fresh air operating conditions are met, the fresh air module can be controlled to execute the corresponding fresh air mode according to the type of the fresh air module, so as to maximize the use of the fresh air function of the fresh air module, at least use the outdoor fresh air to reduce the indoor refrigerant concentration, thereby ensuring the personal and property safety of the indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

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

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

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

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

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

[0022] Figure 6 is another partial flow chart 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 structural diagram of a prediction model of a refrigerant leakage control method provided in some embodiments of the present application;

[0025] Fig. 9 This is a structural diagram of an air conditioner provided in some embodiments of the present application.

[0026] Description of main component symbols:

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

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

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

[0031] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be 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 the stated values ​​in practice.

[0032] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0033] like Figure 1 As shown, in the first aspect, the embodiment of the present application provides a refrigerant leakage control method for controlling an air conditioner 1; such an air conditioner 1 includes a fresh air module, which can at least draw outdoor fresh air into the indoor environment. The refrigerant leakage control method includes S10 to S20, and can promptly handle the refrigerant leakage after it occurs to ensure the personal and property safety of the indoor environment.

[0034] S10: Determine whether refrigerant leakage occurs. The specific judgment method for refrigerant leakage can be determined according to actual needs, such as by detecting and determining by a refrigerant concentration detection device, or by estimating and determining by a refrigerant leakage estimation algorithm, etc., which is not limited in the present embodiment.

[0035] S20: In response to determining that a refrigerant leak has occurred, the following leakage handling operations such as S21 to 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 cooling and heating, and the refrigerant stops circulating and is 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, thereby preventing further leakage of the refrigerant on the indoor side.

[0037] S22: In response to determining that the fresh air operation conditions are met, the fresh air module is controlled to execute a corresponding fresh air mode according to the type of the fresh air module to reduce the indoor refrigerant concentration. The specific method for determining whether the fresh air operation conditions are met can be determined according to actual needs, and the embodiments of the present application are not limited to this. Here, due to different types, the fresh air functions of the fresh air modules are also different, so that the fresh air modules executed by different types of fresh air modules 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 polluted air to the outdoor environment. In this case, the fresh air mode executed by this type of fresh air modules can be controlled to inhale outdoor fresh air; for another example, some fresh air modules have the function of both inhaling outdoor fresh air and discharging indoor polluted air, but cannot perform the functions of inhaling outdoor fresh air and discharging indoor polluted air at the same time but can only perform the functions of inhaling outdoor fresh air and discharging indoor polluted air in a time-sharing manner. In this case, the fresh air mode executed by this type of fresh air modules can be controlled to alternately discharge indoor polluted air and inhale outdoor fresh air; for another example, some fresh air modules have the function of both inhaling outdoor fresh air and discharging indoor polluted air, and can perform the functions of inhaling outdoor fresh air and discharging indoor polluted air at the same time. In this case, the fresh air mode executed by this type of fresh air modules can be controlled to discharge indoor polluted air and inhale outdoor fresh air at the same time.

[0038] Compared with the related art, the refrigerant leakage control method provided in the embodiment of the present application can, when determining that a refrigerant leakage has occurred, on the one hand, recover the refrigerant in the air conditioner 1 to the outdoor side through the refrigerant recovery action to avoid further leakage of the refrigerant on the indoor side; on the other hand, when the fresh air operating conditions are met, the fresh air module can be controlled to execute the corresponding fresh air mode according to the type of the fresh air module, so as to maximize the use of the fresh air function of the fresh air module, at least use the outdoor fresh air to reduce the indoor refrigerant concentration, thereby ensuring the personal and property safety of the indoor environment.

[0039] In some embodiments, the type of the fresh air module may 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 polluted air inlet, so that the first fresh air module can only inhale outdoor fresh air but cannot discharge indoor polluted air; the second fresh air module has an indoor polluted air inlet and an outdoor exhaust outlet that are interconnected, and can inhale outdoor fresh air and discharge indoor polluted air through the outdoor exhaust outlet in a time-sharing manner, but cannot inhale outdoor fresh air and discharge indoor polluted air at the same time; the third fresh air module has an indoor polluted air inlet, an outdoor fresh air inlet, and an outdoor exhaust outlet, and the outdoor fresh air inlet is isolated from the indoor polluted air inlet and the outdoor exhaust outlet, respectively, and the indoor polluted air inlet is connected to the outdoor exhaust outlet, so that on the one hand, outdoor fresh air can be inhaled through the outdoor fresh air inlet, and on the other hand, indoor polluted air can be discharged to the outdoor environment through the indoor polluted air inlet and the outdoor exhaust outlet, so that the third fresh air module can inhale outdoor fresh air and discharge indoor polluted air at the same time. Figure 2 As shown, S22 may include S221 to S223.

[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, control the fresh air module to alternately discharge indoor polluted air and inhale outdoor fresh air. In other words, the fresh air module can alternately switch between discharging indoor polluted air and inhaling outdoor fresh air. The time interval between the fresh air module entering to discharge indoor polluted air and switching to inhaling outdoor fresh air is the running time of the fresh air module discharging indoor polluted air, and the time interval between the fresh air module entering to inhale outdoor fresh air and switching to discharging indoor polluted air is the running time of the fresh air module inhaling outdoor fresh air. Here, the running time of the fresh air module discharging indoor polluted air and the running time of inhaling outdoor fresh air can be determined according to actual needs, and the embodiments of the present application are not limited to this.

[0042] In some examples, the operation time of the fresh air module to discharge indoor polluted air can be set to be positively correlated with the indoor refrigerant concentration, while the operation time of the fresh air module to inhale 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 to discharge indoor polluted air is longer, while the operation time of the fresh air module to inhale outdoor fresh air is shorter, so as to quickly discharge at least most of the leaked refrigerant to the outdoor environment in a shorter 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 to discharge indoor polluted air is shorter, while the operation time of the fresh air module to inhale outdoor fresh air is longer.

[0043] Exemplarily, the operating time of the fresh air module discharging indoor polluted air and the indoor refrigerant concentration may have corresponding calculation equations, and the operating time of the fresh air module inhaling outdoor fresh air and the indoor refrigerant concentration may have corresponding calculation equations, so that the operating time of the fresh air module discharging indoor polluted air and the operating time of inhaling outdoor fresh air directly change with the numerical changes of the indoor refrigerant concentration.

[0044] As another example, several continuously distributed refrigerant concentration intervals may be pre-established, and each refrigerant concentration interval corresponds to a different operating time for discharging indoor dirty air and operating time for inhaling outdoor fresh air. For a refrigerant concentration interval with a larger value, the corresponding operating time for discharging indoor dirty air is larger, and the corresponding operating time for inhaling outdoor fresh air is smaller; for a refrigerant concentration interval with a smaller value, the corresponding operating time for discharging indoor dirty air is smaller, and the corresponding operating time for inhaling outdoor fresh air is larger.

[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. Among them, the first concentration threshold is less than the second concentration threshold. Exemplarily, the operation time of discharging indoor polluted air corresponding to the first refrigerant concentration interval, the operation time of discharging indoor polluted air corresponding to the second refrigerant concentration interval, and the operation time of discharging indoor polluted air corresponding to the third refrigerant concentration interval increase successively, so that the operation time of the fresh air module discharging indoor polluted air is positively correlated with the indoor refrigerant concentration; the operation time of inhaling outdoor fresh air corresponding to the first refrigerant concentration interval, the operation time of inhaling outdoor fresh air corresponding to the second refrigerant concentration interval, and the operation time of inhaling outdoor fresh air corresponding to the third refrigerant concentration interval decrease successively, so that the operation time of the fresh air module inhaling outdoor fresh air is negatively correlated with the indoor refrigerant concentration.

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

[0047] By setting S221~S223, the fresh air function of the fresh air module can be utilized to the maximum extent according to the type of the fresh air module, so as to at least utilize the outdoor fresh air to reduce the indoor refrigerant concentration, and when the exhaust function is provided, the indoor polluted air can be discharged to the outdoor environment in a time-sharing or simultaneous manner, so as to reduce the refrigerant concentration of the indoor environment as quickly as possible, thereby ensuring the personal and property safety of the indoor environment.

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

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

[0050] By setting S23, the indoor fan can be used to suck the indoor return air and the outdoor fresh air sucked into the fresh air module into the indoor air duct and blow them to the indoor air outlet, and then the indoor sweeping mechanism can be used to quickly sweep the air to blow the mixed air containing the 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 from gathering in a smaller area and quickly reducing the refrigerant concentration in the indoor environment.

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

[0052] S2021: Determine whether combustion occurs in the indoor environment. For example, a smoke sensor disposed on the indoor side of the air conditioner 1 or a smoke sensor disposed in the indoor environment may be used to measure and determine whether combustion occurs in the indoor environment in real time.

[0053] S2022: In response to determining that combustion has occurred in the indoor environment, it is determined that the fresh air operation conditions are not met. If the fresh air module has not been turned on at this time, the fresh air module can be controlled not to be turned on, or the fresh air module with exhaust function can be controlled to only turn on the function of exhausting indoor polluted air, but not turn on the function of inhaling outdoor fresh air, so as to avoid increasing indoor oxygen circulation and reduce the risk of flame retardancy. If the fresh air module is in the fresh air mode at this time, the fresh air module can be controlled to stop inhaling outdoor fresh air. For example, the fresh air module can be controlled to shut down, or the fresh air module with exhaust function can be controlled to only turn on the function of exhausting indoor polluted air, but turn off the function of inhaling outdoor fresh air, so as to avoid increasing indoor oxygen circulation and reduce the risk of flame retardancy.

[0054] S2023: In response to determining that no combustion occurs in the indoor environment, it is determined that the fresh air operation condition is met. If the fresh air module is not turned on at this time, the fresh air module can be controlled to turn on 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 embodiment of the present application does not limit this. By setting S2021-S2023, the combustion risk judgment can be performed before turning on the fresh air mode and / or during the operation of the fresh air module, so as to prevent the fresh air mode from being turned on or quickly turn off the fresh air mode when a combustion risk occurs, so as to avoid aggravating the combustion risk and improve indoor safety.

[0056] like Figure 5 As shown, in some embodiments, S10 may include S11-S13.

[0057] S11: Determine whether the preset leakage condition is met. Here, the preset leakage condition may include any one of the following conditions: the indoor refrigerant concentration is greater than the preset concentration, the compressor exhaust pressure is less than the preset exhaust pressure, and the refrigerant leakage ratio is greater than the 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, preset exhaust pressure, and preset leakage ratio can be determined according to actual needs, and the embodiments of the present application are not limited to this.

[0058] S12: In response to determining that the preset leakage condition is satisfied, determining that a refrigerant leakage occurs. Exemplarily, if the indoor refrigerant concentration is greater than the preset concentration, it can be determined that the preset leakage condition is satisfied, and then it can be determined that a refrigerant leakage occurs; another exemplary embodiment, if the compressor exhaust pressure is less than the preset exhaust pressure, it can be determined that the preset leakage condition is satisfied, and then it can be determined that a refrigerant leakage occurs; another exemplary embodiment, if the refrigerant leakage ratio is greater than the preset leakage ratio, it can be determined that the preset leakage condition is satisfied, and then it can be determined that a refrigerant leakage occurs.

[0059] S13: In response to determining that the preset leakage condition is not satisfied, determining that no refrigerant leakage occurs.

[0060] In some examples, the preset leakage condition may include a refrigerant leakage ratio greater than a preset leakage ratio. Figure 6 As shown, S11 may include S111 to S114.

[0061] S111: Determine the standard exhaust pressure of the compressor and the estimated refrigerant amount of the air conditioner 1 according to the 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 the environmental parameters such as indoor temperature, indoor humidity / outdoor humidity, outdoor temperature and the operating parameters such as compressor operating frequency, compressor exhaust temperature, indoor coil temperature, outdoor coil temperature can be used as input variables of the prediction model, and the standard exhaust pressure of the compressor and the estimated refrigerant amount of the air conditioner 1 can be used 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 to obtain the calculated values ​​of the standard exhaust pressure of the compressor and the estimated refrigerant amount of the air conditioner 1.

[0063] like Figure 8As shown, illustratively, the 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 exhaust temperature, indoor coil temperature and outdoor coil temperature, and the output layer of the artificial neural network prediction model can include the standard exhaust pressure of the compressor and the 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 exhaust temperature, indoor coil temperature and outdoor coil temperature can be used as sample data, and the artificial neural network prediction model can be obtained by model training based on the artificial neural network.

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

[0065]

[0066] Among them, c0 is the refrigerant leakage ratio, c1 is the empirical coefficient, b 实际排气压力 is the measured value of the compressor exhaust pressure, which can be measured by the pressure sensor installed at the compressor exhaust port. 标准排气压力 is the standard exhaust 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 It is the standard refrigerant quantity of the model to which air conditioner 1 belongs.

[0067] S113: Determine whether the refrigerant leakage ratio is greater than a preset leakage ratio. Here, the preset leakage ratio may be pre-set in the control system of the air conditioner 1 and 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, determining that a preset leakage condition is satisfied.

[0069] By setting S111 to S114, it is possible to more accurately determine whether a refrigerant leakage occurs, so that leakage disposal operations can be performed in a timely manner when a refrigerant leakage occurs.

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

[0071] S40: In response to determining that no refrigerant leakage has occurred and receiving a shutdown command, the air conditioner 1 is controlled to perform a refrigerant recovery action. Here, the refrigerant recovery operation in S40 may be the same as the specific steps of the refrigerant recovery operation in S21. In this way, when no refrigerant leakage has occurred, if it is necessary to control the air conditioner 1 to shut down, the refrigerant can be recovered to the outdoor side through the refrigerant recovery operation, so that all or at least most of the refrigerant is recovered and stored on the outdoor side, almost no refrigerant remains on the indoor side or only a small amount of refrigerant within a safe range remains on the indoor side, 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 the heating mode, the following operations are performed, such as S2041 to S2042.

[0074] S2041: Control the compressor to stop, and control the electronic expansion valve to operate at the maximum opening. During this process, the reversing valve in the air conditioner 1 does not reverse, so that the flow direction of the refrigerant in the air conditioner 1 remains in the flow direction corresponding to the heating mode. During this process, the compressor no longer exhausts to the outside, and the refrigerant remaining on the indoor side flows from the indoor heat exchanger to the outdoor heat exchanger through the electronic expansion valve, so that all or at least most of the refrigerant is recovered and stored on the outdoor side. Since the electronic expansion valve operates at the maximum opening, the refrigerant can be quickly recovered to the outdoor side.

[0075] S2042: After the electronic expansion valve runs at the maximum opening for the first preset time, the electronic expansion valve is controlled to close. Here, the first preset time can be preset in the control system of the air conditioner 1. After the electronic expansion valve runs at the maximum opening for the first preset time, it can be considered that all or at least most of the refrigerant has been recovered to the outdoor side. Even if there is still a small amount of refrigerant remaining on the indoor side, the small amount of refrigerant is already 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, and the electronic expansion valve can be closed to a minimum opening of, for example, zero, so that the outdoor side and the indoor side are cut off and no 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 the cooling mode, the electronic expansion valve is controlled to close, and the compressor is controlled to shut down immediately or delay shutting down. Here, after receiving the shutdown command, the electronic expansion valve can be controlled to close immediately to a minimum opening such as zero, and the compressor is shut down immediately, and most of the refrigerant is recovered to the outdoor side by using the residual pressure difference; or, the compressor can be controlled to delay shutting down, and all or most of the refrigerant is recovered to the outdoor side by using the pressure provided by the compressor.

[0077] In the second aspect, an embodiment of the present application provides a refrigerant leakage control device, including: a leakage judgment circuit, configured to determine whether a refrigerant leakage occurs; a leakage processing circuit, configured to perform the following leakage handling operations in response to determining that a refrigerant leakage occurs: controlling the air conditioner 1 to perform a refrigerant recovery action to recover the refrigerant in the air conditioner 1 to the outdoor side; controlling the fresh air module to execute a corresponding fresh air mode according to the type of the fresh air module to reduce the indoor refrigerant concentration.

[0078] like Fig. 9 As shown, in a third aspect, an embodiment of the present application provides an air conditioner 1, which includes a fresh air module, a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, a refrigerant leakage control method as provided in any of the above embodiments is implemented.

[0079] The type of the fresh air module can be determined according to actual needs. For example, one of the first fresh air module, the second fresh air module and the third fresh air module mentioned above can be used, and a corresponding fresh air mode can be 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 capabilities. The above-mentioned processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can be an X86 architecture or an ARM architecture.

[0081] The memory 20 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but 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 (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronously linked dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). It should be noted that the memory 20 of the method described herein is intended to include, but is not limited to, these and any other suitable types of memory.

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

[0083] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks or key drives, etc.). The various computer-readable storage media described in the embodiments of the present application may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0084] The above is a detailed introduction to a refrigerant leakage control method, device, air conditioner and computer-readable storage medium provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A refrigerant leakage control method, characterized in that: Used to control an air conditioner, the air conditioner includes a fresh air module, and the refrigerant leakage control method includes: Determine if a refrigerant leak has occurred; In response to determining that a refrigerant leak has occurred, the following leak handling operations are performed: Controlling the air conditioner to perform a refrigerant recovery action to recover the refrigerant in the air conditioner to the outdoor side; In response to determining that the fresh air operation condition is met, the fresh air module is controlled to execute a corresponding fresh air mode according to the type of the fresh air module.

2. The refrigerant leakage control method according to claim 1, characterized in that: Controlling the fresh air module to execute 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, controlling the fresh air module to inhale outdoor fresh air, the first fresh air module not having an indoor polluted air inlet; In response to determining that the fresh air module is the second fresh air module, controlling the fresh air module to alternately discharge indoor polluted air and inhale outdoor fresh air, the operation time of the fresh air module discharging indoor polluted air is positively correlated with the indoor refrigerant concentration, the operation time of the fresh air module inhaling outdoor fresh air is negatively correlated with the indoor refrigerant concentration, and the second fresh air module has an indoor polluted air inlet and an outdoor air outlet that are interconnected; In response to determining that the fresh air module is the third fresh air module, the fresh air module is controlled to synchronously discharge indoor polluted air and inhale outdoor fresh air, the indoor polluted air inlet and the outdoor exhaust outlet are connected, and the third fresh air module has an indoor polluted air inlet, an outdoor fresh air inlet and an outdoor exhaust outlet, and the outdoor fresh air inlet is isolated from the indoor polluted air inlet and the outdoor exhaust outlet, respectively.

3. The refrigerant leakage control method according to claim 1, characterized in that: The air conditioner includes an indoor air sweeping mechanism and an indoor fan; the leakage handling operation includes: The indoor fan is controlled to run at a preset speed, and the indoor air sweeping mechanism is controlled to sweep air at preset air sweeping parameters.

4. The refrigerant leakage control method according to claim 1, characterized in that: The refrigerant in the air conditioner is a flammable refrigerant; the leakage treatment operation includes: Determine whether combustion occurs in the indoor environment; In response to determining that combustion occurs in the indoor environment, determining that a fresh air operation condition is not met; In response to determining that combustion does not occur in the indoor environment, it is determined that fresh air operation conditions are met.

5. The refrigerant leakage control method according to claim 1, characterized in that: Determine if a refrigerant leak has occurred, including: Determine whether a preset leakage condition is met, wherein the preset leakage condition includes any one of the following conditions: indoor refrigerant concentration is greater than a preset concentration, compressor exhaust pressure is less than a preset exhaust pressure, and refrigerant leakage ratio is greater than a preset leakage ratio; In response to determining that a preset leakage condition is satisfied, determining that a refrigerant leakage occurs; In response to determining that the preset leakage condition is not satisfied, it is determined that no refrigerant leakage has occurred.

6. The refrigerant leakage control method according to claim 5, characterized in that: The preset leakage condition includes that the refrigerant leakage ratio is greater than the preset leakage ratio; determining whether the preset leakage condition is met includes: Determining a standard exhaust pressure of the compressor and an estimated refrigerant quantity of the air conditioner according to a prediction model; determining a refrigerant leakage ratio according to a standard exhaust pressure of the compressor and an estimated refrigerant quantity 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, it is determined that a preset leakage condition is satisfied.

7. The refrigerant leakage control method according to claim 1, characterized in that: include: 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 in that: The refrigerant recovery operation includes: In response to the air conditioner being in heating mode, the following operations are performed: Control the compressor to stop and control the electronic expansion valve to operate at the maximum opening; After the electronic expansion valve operates at the maximum opening for a first preset time, controlling the electronic expansion valve to close; In response to the air conditioner being in cooling mode, the electronic expansion valve is controlled to be closed, and the compressor is controlled to be stopped immediately or with a delayed stop.

9. A refrigerant leakage control device, characterized in that: Used to control an air conditioner, the air conditioner includes a fresh air module, and the refrigerant leakage control device includes: a leakage determination circuit configured to determine whether a refrigerant leakage occurs; The leakage processing circuit is configured to perform the following leakage processing operations in response to determining that a refrigerant leakage occurs: Controlling the air conditioner to perform a refrigerant recovery action to recover the refrigerant in the air conditioner to the outdoor side; In response to determining that the fresh air operation condition is met, the fresh air module is controlled to execute a corresponding fresh air mode according to the type of the fresh air module.

10. An air conditioner, characterized in that: include: Fresh air module; a memory storing a computer program; A processor, wherein when the computer program is executed by the processor, the refrigerant leakage control method according to any one of claims 1 to 8 is implemented.

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 execute the steps in the refrigerant leakage control method according to any one of claims 1 to 8.

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