A method, apparatus, air conditioner, and storage medium for charging refrigerant in an air conditioner.

Abstract

This invention discloses a method, apparatus, air conditioner, and storage medium for refrigerant charging in an air conditioner. The method includes: detecting the current refrigerant mass flow rate of the air conditioner; obtaining a preset standard refrigerant mass flow rate of the air conditioner and determining whether the air conditioner needs refrigerant charging based on the preset standard refrigerant mass flow rate and the current refrigerant mass flow rate; if the air conditioner needs refrigerant charging, controlling the valve of the refrigerant storage tank to open for refrigerant charging. By implementing the method of this invention, automatic refrigerant replenishment for air conditioners can be achieved, reducing the required labor and time costs and improving user comfort.

Description

TECHNICAL FIELD

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

[0002] With the continuous development of industry, the proportion of air conditioners in daily life is gradually increasing. Air conditioners achieve refrigeration or heating through refrigerants, but in the process of use, certain refrigerant loss is inevitable. If the refrigerant loss reaches a certain degree, it will affect the refrigeration or heating effect of the air conditioner, thereby affecting the user's experience. Usually, artificial is used to release the refrigerant of the air conditioner and re-fill sufficient refrigerant, which leads to waste of remaining refrigerant and easy pollution, and high time and labor costs in the maintenance process. SUMMARY

[0003] The present application provides an air conditioner refrigerant charging method, device, air conditioner and storage medium, which aims to realize automatic addition of air conditioner refrigerant and reduce the required labor and time costs.

[0004] In a first aspect, the present application provides an air conditioner refrigerant charging method, which includes detecting the current refrigerant mass flow of the air conditioner; obtaining a preset standard refrigerant mass flow of the air conditioner and determining whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow; and if the air conditioner needs to be charged with refrigerant, opening the valve of the refrigerant reserve tank to charge the refrigerant.

[0005] In a second aspect, the present application also provides an air conditioner refrigerant charging device, which includes a detection unit for detecting the current refrigerant mass flow of the air conditioner; a judgment unit for obtaining a preset standard refrigerant mass flow of the air conditioner and determining whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow; and a control unit for opening the valve of the refrigerant reserve tank to charge the refrigerant if the air conditioner needs to be charged with refrigerant.

[0006] In a third aspect, the present application also provides an air conditioner, which includes a memory and a processor, the memory having a computer program stored thereon, and the processor implementing the above method when executing the computer program.

[0007] In a fourth aspect, the present application also provides a computer readable storage medium, which stores a computer program, the computer program including program instructions, and the program instructions being executable by a processor to implement the above method.

[0008] The embodiment of the present application provides a refrigerant charging method and device of an air conditioner, the air conditioner and a storage medium. The method comprises the following steps: detecting a current refrigerant mass flow of the air conditioner; obtaining a preset standard refrigerant mass flow of the air conditioner and judging whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow; and if the air conditioner needs to be charged with refrigerant, opening a valve of a refrigerant storage tank to charge the refrigerant. The embodiment of the present application judges whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow, and if the air conditioner needs to be charged with refrigerant, the refrigerant in the refrigerant storage tank is added to the air conditioner, so that the automatic addition of the refrigerant of the air conditioner is realized, the required labor and time cost are reduced, and the user comfort is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of 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 some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0010] Figure 1 The air conditioner refrigerant charging scene schematic diagram provided by the embodiment of the present application is shown in the figure.

[0011] Figure 2 The air conditioner refrigerant charging flowchart provided by the embodiment of the present application is shown in the figure.

[0012] Figure 3 The air conditioner refrigerant charging sub-flowchart provided by the embodiment of the present application is shown in the figure.

[0013] Figure 4 The air conditioner refrigerant charging sub-flowchart provided by the embodiment of the present application is shown in the figure.

[0014] Figure 5 The air conditioner refrigerant charging sub-flowchart provided by the embodiment of the present application is shown in the figure.

[0015] Figure 6 The air conditioner refrigerant charging sub-flowchart provided by the embodiment of the present application is shown in the figure.

[0016] Figure 7 The logic diagram of the air conditioner refrigerant charging provided by the embodiment of the present application is shown in the figure.

[0017] Figure 8 The schematic block diagram of the air conditioner refrigerant charging device provided by the embodiment of the present application is shown in the figure.

[0018] Figure 9 The schematic block diagram of the air conditioner provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0019] 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0020] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0021] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0023] Please refer to Figure 1 , Figure 1 The air conditioner refrigerant charging scene schematic diagram provided by the embodiments of the present application. The air conditioner refrigerant charging method in the embodiments can be applied to an air conditioner. By setting a mass flow meter and a refrigerant reserve tank, the air conditioner with refrigerant loss in daily use or air conditioner disassembly and reinstallation can be automatically charged with refrigerant. If the refrigerant is charged according to the traditional method, the refrigerant will be wasted and polluted. By using the method, the automatic addition of air conditioner refrigerant can be realized, and the required labor and time cost can be reduced.

[0024] The embodiments of the present application provide an air conditioner, which comprises an evaporator, a condenser, a compressor and a throttling device. The evaporator, the compressor, the condenser and the throttling device are connected in sequence to form a refrigerant circulation loop. The air conditioner further comprises a mass flow meter and a refrigerant reserve tank. The mass flow meter is arranged between the condenser and the throttling device, and the refrigerant reserve tank is connected to the refrigerant circulation loop.

[0025] Specifically, the refrigerant reserve tank is a container for storing refrigerant to be charged. Since the refrigerant cannot be exposed to sunlight or be close to a heating appliance during storage, the refrigerant reserve tank can be arranged near a small valve connection pipe or near a condenser. The refrigerant reserve amount in the refrigerant reserve tank can be provided according to a certain proportion of the total refrigerant amount required by the air conditioner, which is not limited herein. The mass flow meter is used to detect the mass flow of the refrigerant of the air conditioner. The mass flow meter is an instrument for measuring the mass flow of a substance and is suitable for measuring the flow of gas and liquid. The mass flow meter can accurately measure the flow without being affected by temperature, pressure, density and viscosity, because it measures the flow by measuring the mass of the refrigerant, rather than obtaining flow data by measuring volume or speed. In order to detect the mass flow of the refrigerant in real time, the mass flow meter is arranged between the condenser outlet and the throttling device in the refrigeration direction, and the refrigerant is in a liquid state at this position, which facilitates the mass flow meter to detect the mass flow of the refrigerant. After the air conditioner is first charged with refrigerant, the refrigerant in the air conditioner is sufficient, so the valve of the refrigerant reserve tank is closed, and the refrigerant in the refrigerant reserve tank does not participate in refrigeration, until the refrigerant in the air conditioner is lost and needs to be charged. According to the system instruction, the valve of the refrigerant reserve tank is controlled to be opened, and a certain amount of refrigerant can be supplemented into the air conditioner by arranging a pressure pump or relying on gravity. By arranging the mass flow meter between the condenser and the throttling device, the mass flow of the refrigerant in the air conditioner can be detected in real time. By connecting the refrigerant reserve tank in the refrigerant circulation loop, the refrigerant can be reserved, which facilitates automatic addition of refrigerant when the air conditioner lacks refrigerant, and avoids the cost of on-site maintenance.

[0026] Figure 2 is a schematic diagram of the refrigerant charging process of the air conditioner provided by the embodiment of the present application. As shown in the figure, the method comprises the following steps S110-S130.

[0027] S110, detecting the current refrigerant mass flow of the air conditioner.

[0028] In this embodiment, the current refrigerant mass flow is the refrigerant mass flow under the current refrigerant amount of the air conditioner. The mass flow of the refrigerant is the actual refrigeration capacity divided by the enthalpy difference of the refrigerant at the inlet and outlet of the evaporator, which is irrelevant to the wind speed, temperature and other factors of the current air conditioner operation, and is only related to the mass of the refrigerant. The current refrigerant mass flow of the air conditioner can be directly obtained by the mass flow meter. When the air conditioner is started and operated, the air conditioner automatically enters the refrigerant detection mode and automatically detects the current refrigerant mass flow by the mass flow meter. By detecting and recording the current refrigerant mass flow of the air conditioner, the state of the refrigerant amount in the current air conditioner can be detected in real time, which facilitates understanding whether the refrigerant is sufficient.

[0029] S120, obtaining a preset standard refrigerant mass flow of the air conditioner and determining whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow.

[0030] In the embodiment, the preset standard refrigerant mass flow is the mass flow of refrigerant in the state of sufficient refrigerant of the air conditioner. By obtaining the standard refrigerant mass flow in the state of sufficient refrigerant, the standard refrigerant mass flow can be used as a reference to determine whether the current refrigerant is sufficient. Since the refrigerant mass flow is only related to the mass of the refrigerant, if the current refrigerant mass flow is not less than the standard refrigerant mass flow, it can be determined that the refrigerant amount of the air conditioner is not reduced, and if the current refrigerant mass flow is less than the standard refrigerant mass flow, it can be determined that the refrigerant amount of the air conditioner is reduced, and when the refrigerant is reduced, the refrigerant needs to be charged. By obtaining the preset standard refrigerant mass flow in the state of sufficient refrigerant, whether the refrigerant of the air conditioner is sufficient and whether the refrigerant needs to be charged can be determined according to the preset standard refrigerant mass flow and the current refrigerant mass flow.

[0031] In an embodiment, as shown in FIG. 1, the step S120 further includes steps S121-S122. Figure 3

[0032] S121, detecting initial refrigerant mass flows at multiple refrigerant outlet positions of the condenser when the air conditioner is in the state of sufficient refrigerant and operates according to a preset operating condition;

[0033] S122, determining the preset standard refrigerant mass flow according to the multiple initial refrigerant mass flows.

[0034] ​In the embodiment, the preset operating condition is a fixed operating condition, and specifically, the preset operating condition can be a fixed operating frequency, a fixed opening degree, and a fixed time. For example, when the refrigerant is sufficient, the opening degree of the air conditioner is set to 26 degrees, the air speed is set to the first gear, and the flow rate of each point at a certain time is recorded at random three positions of the condenser outlet within 5 minutes. At this time, the flow rate is the initial refrigerant flow rate. According to a plurality of initial refrigerant flow rates, the preset standard refrigerant flow rate can be determined. Specifically, when the mass flow rate is obtained, the mass flow rate will be stable in a range, for example, the mass flow rates at the random three positions of the condenser outlet are a1-a1, a2-a2, and a3-a3. The final average value of the three positions can be calculated by obtaining the average value of the mass flow rate at each position, and the final average value obtained is used as the preset standard refrigerant flow rate. Alternatively, the upper limit average value of a1-a1, a2-a2, and a3-a3 is used as the preset standard refrigerant flow rate, that is, (b1+b2+b3) / 3, or the lower limit average value of a1-a1, a2-a2, and a3-a3 is obtained as the preset standard refrigerant flow rate. Regardless of how the preset standard refrigerant flow rate is determined, the final preset standard refrigerant flow rate will be between (a1+a2+a3) / 3 and (b1+b2+b3) / 3, so that the deviation of the preset standard refrigerant flow rate is within a reasonable range.

[0035] In the embodiment, the preset standard refrigerant flow rate is determined according to the number of refrigerant outlets and the lower limit values of a plurality of initial refrigerant flow rates, wherein each initial refrigerant flow rate includes an upper limit value and a lower limit value. That is, in the embodiment, the preset standard refrigerant flow rate is determined according to the lower limit value of each initial refrigerant flow rate. For example, when the mass flow rates at the random three positions of the condenser outlet are a1-a1, a2-a2, and a3-a3, the preset standard refrigerant flow rate is (a1+a2+a3) / 3. By detecting the initial refrigerant flow rate at the refrigerant outlet position of the condenser when the refrigerant is sufficient and operating according to the preset operating condition, and determining the preset standard refrigerant flow rate according to a plurality of initial refrigerant flow rates, other interference conditions can be excluded, and the standard refrigerant flow rate obtained due to external factors can be avoided.

[0036] In an embodiment, as shown in Figure 4 The step S120 further includes steps S123-S125.

[0037] S123, determining whether the current refrigerant flow rate is less than the preset standard refrigerant flow rate;

[0038] S124, if the current refrigerant mass flow rate is less than the preset standard refrigerant mass flow rate, determining whether the current refrigerant mass flow rate is less than a preset refrigerant leakage value, wherein the preset refrigerant leakage value is determined by the preset standard refrigerant mass flow rate;

[0039] S125, if the current refrigerant mass flow rate is less than the preset refrigerant leakage value, determining that the air conditioner needs to be charged with refrigerant.

[0040] In the embodiment, the preset refrigerant leakage value is the mass flow rate of the refrigerant amount after slight reduction, and the heat exchange efficiency of the preset refrigerant leakage value is reduced, but does not affect the user experience. The preset refrigerant leakage value is determined by the preset standard refrigerant mass flow rate. For example, if the preset standard refrigerant mass flow rate is (a1+a2+a3) / 3, the preset refrigerant leakage value can be 90% (a1+a2+a3) / 3 or 95% (a1+a2+a3) / 3, and the preset refrigerant leakage value is within the range that does not affect the user experience. Determine whether the current refrigerant mass flow rate is less than the preset standard refrigerant mass flow rate. Since the preset standard refrigerant mass flow rate is the lower limit value of the plurality of initial refrigerant flow rates, if the current refrigerant mass flow rate is greater than the preset standard refrigerant mass flow rate, it indicates that the refrigerant is basically reduced at this time, and does not affect heat exchange. At this time, it is not necessary to add refrigerant, and the refrigerant charging device does not need to be started, and the air conditioner exits the refrigerant detection mode. If the current refrigerant mass flow rate is less than the preset standard refrigerant mass flow rate, determine whether the current refrigerant mass flow rate is less than the preset refrigerant leakage value. If it is less than the preset refrigerant leakage value, it indicates that the current refrigerant has a slight reduction, but does not affect the user experience. At this time, the air conditioner also exits the refrigerant detection mode. If the current refrigerant mass flow rate is less than the preset refrigerant leakage value, it indicates that the refrigerant leaks, and the remaining refrigerant amount is lower than the refrigerant amount required for normal refrigeration. Determine that the air conditioner needs to be charged with refrigerant. At this time, the compressor of the air conditioner stops running, the fan also stops running, and the refrigerant charging device is started to supplement refrigerant to the air conditioner. By determining whether the current refrigerant mass flow rate is less than the preset refrigerant leakage value, it is determined whether the refrigerant remaining in the air conditioner is sufficient for normal use. If the refrigerant is less than the preset refrigerant leakage value, it indicates that the air conditioner needs to be charged with refrigerant.

[0041] S130, if the air conditioner needs to be charged with refrigerant, control the valve of the refrigerant storage tank to be opened to charge refrigerant.

[0042] In the embodiment, if the air conditioner needs to be filled with refrigerant, the compressor stops, the refrigerant stops circulating, and the fan stops working, so as to avoid adding refrigerant during the operation of the air conditioner and causing the air conditioner to malfunction, and the refrigerant filling device is started, that is, the valve of the refrigerant storage tank is opened. After being opened, the refrigerant in the refrigerant storage tank can be filled into the air conditioner through the pressure pump, or the refrigerant storage tank can be placed upside down, and the refrigerant in the refrigerant storage tank can be filled into the air conditioner through gravity. By opening the valve of the refrigerant storage tank, the refrigerant can be automatically filled into the air conditioner, the automatic addition of the refrigerant of the air conditioner is realized, and the labor and time cost required is reduced.

[0043] In an embodiment, as shown in Figure 5 The step S130 further includes steps S131-S132.

[0044] S131, determining a refrigerant filling amount according to the current refrigerant mass flow, the total refrigerant amount of the air conditioner, and the preset standard refrigerant mass flow;

[0045] S132, controlling the valve of the refrigerant storage tank to be opened to fill refrigerant according to the refrigerant filling amount.

[0046] In the embodiment, the refrigerant filling amount is the amount of refrigerant that needs to be supplemented, and the refrigerant filling amount is determined according to the current refrigerant mass flow, the total refrigerant amount of the air conditioner, and the preset standard refrigerant mass flow. Specifically, the total refrigerant amount is represented by G, the current refrigerant mass flow is represented by q, the refrigerant filling amount is represented by d, and the preset standard refrigerant mass flow is (a1+a2+a3) / 3. The preset formula for obtaining d is:

[0047] d = (1-q / [(a1+a2+a3) / 3])*G (1)

[0048] The refrigerant filling amount is obtained by the preset formula, that is, the amount of refrigerant that needs to be filled into the air conditioner can be known. The valve of the refrigerant storage tank is controlled to be opened to fill refrigerant according to the required refrigerant filling amount, so as to realize the automatic filling of the refrigerant of the air conditioner, and avoid the pollution and waste caused by the selection of discharging the refrigerant in the air conditioner and refilling sufficient refrigerant in the traditional method due to the inability to estimate the actual content of the refrigerant in the air conditioner.

[0049] In an embodiment, as shown in Figure 6 The step S130 further includes steps S1321-S1323.

[0050] S1321, determining a target residual refrigerant amount according to the obtained storage refrigerant amount of the refrigerant storage tank and the refrigerant filling amount;

[0051] S1322, control the valve of the refrigerant reserve tank to open and detect the current remaining refrigerant amount of the refrigerant reserve tank in real time;

[0052] S1323, when the current remaining refrigerant amount is less than or equal to the target remaining refrigerant amount, control the valve of the refrigerant reserve tank to close.

[0053] In the embodiment, the target remaining refrigerant amount is the weight of the refrigerant reserve tank after the refrigerant charging amount is reduced, and the target remaining refrigerant amount is determined according to the obtained refrigerant reserve amount and the refrigerant charging amount of the refrigerant reserve tank. Specifically, a preset formula for obtaining the target remaining refrigerant amount is:

[0054] m=M-(1-q / [(a1+a2+a3) / 3])*G (2)

[0055] wherein M is the refrigerant amount reserved by the refrigerant reserve tank, m is the target remaining refrigerant amount, and (1-q / [(a1+a2+a3) / 3])*G is the refrigerant charging amount. After the target remaining refrigerant amount is determined, the valve of the refrigerant reserve tank is controlled to open, and the current remaining refrigerant amount of the refrigerant reserve tank is detected in real time by the gravity sensing device pre-set in the refrigerant reserve tank. If the current remaining refrigerant amount is greater than the target remaining refrigerant amount, it means that the refrigerant is not charged to the air conditioner in sufficient amount, and the refrigerant in the air conditioner does not reach the sufficient state, and the refrigerant charging is still continued. If the current remaining refrigerant amount is less than or equal to the target remaining refrigerant amount, it means that the refrigerant has been charged to the air conditioner in sufficient amount, and the refrigerant charging is completed. The valve of the refrigerant reserve tank can be controlled to close, the compressor is restarted to operate, the unit exits the refrigerant detection mode, and enters the normal air conditioning working state. By judging whether the current remaining refrigerant amount is less than or equal to the target remaining refrigerant amount, whether the refrigerant charging is completed is determined, automatic refrigerant charging and adding sufficient refrigerant are realized, the labor and time cost are greatly reduced, and waste is avoided.

[0056] In order to further understand the refrigerant charging process of the embodiment of the application, the following is described through specific examples:

[0057] When the air conditioner is turned on, the air conditioner automatically enters a refrigerant charging detection mode, detects the current refrigerant mass flow rate in the air conditioner at the current time, and compares the current refrigerant mass flow rate with a preset standard refrigerant mass flow rate. If the current refrigerant mass flow rate is less than the preset standard refrigerant mass flow rate, it is determined whether the current refrigerant mass flow rate is greater than or equal to a preset refrigerant leakage value, wherein the preset refrigerant leakage value is determined by the preset standard refrigerant mass flow rate, for example, the preset refrigerant leakage value can be set to 90% of the preset standard refrigerant mass flow rate. If the current refrigerant mass flow rate is less than the preset refrigerant leakage value, it is determined that the air conditioner needs to be charged with refrigerant. At this time, the compressor stops, the fan also stops working, the refrigerant charging device is started, the valve of the refrigerant storage tank is controlled to be opened, the refrigerant in the refrigerant storage tank is charged into the air conditioner, and the process is repeated until the remaining amount of refrigerant in the refrigerant storage tank is less than or equal to the target remaining refrigerant amount, which represents that the refrigerant charging in the air conditioner is completed. At this time, the air conditioner exits the refrigerant charging mode, the valve of the refrigerant storage tank is closed, and the air conditioner operates normally. If the current refrigerant mass flow rate is greater than or equal to the preset refrigerant leakage value, it represents that the air conditioner does not need to be charged with refrigerant, and the refrigerant charging mode does not need to be started. The air conditioner operates normally. Through the present application, automatic supplement of air conditioner refrigerant can be realized, and labor and time cost can be reduced.

[0058] Figure 8 is a schematic block diagram of an air conditioner refrigerant charging device 200 provided by an embodiment of the present application. As shown in Figure 8 corresponding to the above air conditioner refrigerant charging method, the present application also provides an air conditioner refrigerant supplement device. The air conditioner refrigerant charging device includes an air conditioner refrigerant charging unit for performing the above air conditioner refrigerant charging unit, and the device can be configured in the air conditioner. Specifically, please refer to Figure 8 , the air conditioner refrigerant charging device includes a detection unit 210, a judgment unit 220, and a control unit 230.

[0059] The detection unit 210 is configured to detect the current refrigerant mass flow rate of the air conditioner.

[0060] The judgment unit 220 is configured to obtain the preset standard refrigerant mass flow rate of the air conditioner and determine whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow rate and the current refrigerant mass flow rate.

[0061] In an embodiment, the judgment unit 220 includes a first detection unit, a first determination unit, and a second determination unit.

[0062] The first detection unit is configured to detect the initial refrigerant mass flow rate at the plurality of refrigerant outlet positions of the condenser when the air conditioner is in a refrigerant sufficient state and operates according to a preset operating condition.

[0063] a first determining unit configured to determine the preset standard refrigerant mass flow rate according to a plurality of the initial refrigerant mass flow rates;

[0064] a second determining unit configured to determine the preset standard refrigerant mass flow rate according to a number of refrigerant outlets and lower limit values of the initial refrigerant mass flow rates, wherein each of the initial refrigerant mass flow rates comprises an upper limit value and a lower limit value.

[0065] In an embodiment, the judging unit 220 further comprises a first judging unit, a second judging unit and a charging unit.

[0066] the first judging unit is configured to judge whether the current refrigerant mass flow rate is less than a preset standard refrigerant mass flow rate;

[0067] the second judging unit is configured to judge whether the current refrigerant mass flow rate is less than a preset refrigerant leakage value if the current refrigerant mass flow rate is less than the preset standard refrigerant mass flow rate, wherein the preset refrigerant leakage value is determined by the preset standard refrigerant mass flow rate;

[0068] the charging unit is configured to determine that the air conditioner needs to be charged with refrigerant if the current refrigerant mass flow rate is less than the preset refrigerant leakage value.

[0069] a control unit 230 configured to control a valve of a refrigerant reserve tank to be opened to charge refrigerant if the air conditioner needs to be charged with refrigerant.

[0070] In an embodiment, the control unit 230 comprises a third determining unit and an opening unit.

[0071] the third determining unit is configured to determine a refrigerant charging amount according to the current refrigerant mass flow rate, a total refrigerant amount of the air conditioner and the preset standard refrigerant mass flow rate;

[0072] the opening unit is configured to control the valve of the refrigerant reserve tank to be opened to charge refrigerant according to the refrigerant charging amount.

[0073] In an embodiment, the opening unit comprises a fourth determining unit, a remaining unit and a closing unit.

[0074] the fourth determining unit is configured to determine a target remaining refrigerant amount according to the obtained reserve refrigerant amount of the refrigerant reserve tank and the refrigerant charging amount;

[0075] the remaining unit is configured to control the valve of the refrigerant reserve tank to be opened and detect a current remaining refrigerant amount of the refrigerant reserve tank in real time;

[0076] A closing unit is configured to control the valve of the refrigerant reserve tank to be closed when the current remaining refrigerant amount is less than or equal to the target remaining refrigerant amount.

[0077] It should be noted that the specific implementation process of the air conditioner refrigerant charging device 200 and each unit can be clearly understood by those skilled in the art, and can refer to the corresponding description in the foregoing method embodiments. For the convenience and brevity of description, it will not be repeated here.

[0078] The air conditioner refrigerant charging device can be realized in the form of a computer program, which can run on an air conditioner as shown in the accompanying drawings. Figure 9

[0079] Please refer to Figure 9 , Figure 9 is a schematic block diagram of an air conditioner provided by an embodiment of the present application.

[0080] Refer to Figure 9 , the air conditioner 500 includes a processor 502, a memory, and a network interface 505 connected through a system bus 501, wherein the memory can include a non-volatile storage medium 503 and an internal memory 504.

[0081] The non-volatile storage medium 503 can store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions which, when executed, can cause the processor 502 to perform an air conditioner refrigerant charging method.

[0082] The processor 502 is configured to provide computing and control capabilities to support the operation of the entire air conditioner 500.

[0083] The internal memory 504 provides an environment for the execution of the computer program 5032 in the non-volatile storage medium 503, which, when executed by the processor 502, can cause the processor 502 to perform an air conditioner refrigerant charging method.

[0084] The network interface 505 is configured to communicate with other devices over a network. Those skilled in the art can understand that Figure 9 The structure shown in the accompanying drawings is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the air conditioner 500 to which the scheme of the present application is applied. The specific air conditioner 500 can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0085] The processor 502 is configured to run the computer program 5032 stored in the memory to implement the steps of the method.

[0086] ​It should be understood that, in the embodiments of the present application, the processor 502 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0087] It can be understood by those skilled in the art that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program includes program instructions, and the computer program can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the above-mentioned embodiments.

[0088] Therefore, the present application also provides a storage medium. The storage medium can be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. The program instructions are executed by a processor to make the processor execute the steps of the above-mentioned method.

[0089] The storage medium can be a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk, and various computer-readable storage media that can store program codes.

[0090] It can be understood by those skilled in the art that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0091] In several embodiments provided by the present application, it should be understood that the disclosed apparatus and method can be implemented in other manners. For example, the embodiments of the apparatus described above are merely schematic. For example, the division of the units is merely a logical function division. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In this way, the inventive idea can be implemented.

[0092] The steps in the method embodiments of the present application can be adjusted, combined and deleted in sequence according to actual needs. The units in the apparatus embodiments of the present application can be combined, divided and deleted according to actual needs. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0093] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing an air conditioner (which can be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application.

[0094] The above description is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any modification or replacement within the technical range disclosed by the present application can be easily thought by those skilled in the art, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air conditioner refrigerant charging method characterized by comprising: The method comprises the following steps: detecting a current refrigerant mass flow of the air conditioner; acquiring a preset standard refrigerant mass flow of the air conditioner and determining whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow; if the air conditioner needs to be charged with refrigerant, opening a valve of a refrigerant reserve tank to charge the refrigerant; the step of acquiring the preset standard refrigerant mass flow of the air conditioner comprises: when the air conditioner is in a refrigerant sufficient state and operates according to a preset operating condition, detecting initial refrigerant mass flows at multiple refrigerant outlet positions of a condenser; determining the preset standard refrigerant mass flow according to the multiple initial refrigerant mass flows comprises: determining the preset standard refrigerant mass flow according to the number of the multiple refrigerant outlets and the lower limit value of the multiple initial refrigerant mass flows, wherein each of the multiple initial refrigerant mass flows comprises an upper limit value and a lower limit value; the step of opening the valve of the refrigerant reserve tank to charge the refrigerant comprises: determining a refrigerant charging amount according to the current refrigerant mass flow, the total refrigerant amount of the air conditioner and the preset standard refrigerant mass flow; the step of determining whether the air conditioner needs to be charged with refrigerant comprises: determining whether the current refrigerant mass flow is less than the preset standard refrigerant mass flow; if the current refrigerant mass flow is less than the preset standard refrigerant mass flow, determining whether the current refrigerant mass flow is less than a preset refrigerant leakage value, wherein the preset refrigerant leakage value is determined by the preset standard refrigerant mass flow; if the current refrigerant mass flow is less than the preset refrigerant leakage value, determining that the air conditioner needs to be charged with refrigerant.

2. The method of claim 1, wherein, the step of opening the valve of the refrigerant reserve tank to charge the refrigerant comprises: determining a refrigerant charging amount according to the current refrigerant mass flow, the total refrigerant amount of the air conditioner and the preset standard refrigerant mass flow; opening the valve of the refrigerant reserve tank to charge the refrigerant according to the refrigerant charging amount.

3. The method of claim 2, wherein, the step of opening the valve of the refrigerant reserve tank to charge the refrigerant according to the refrigerant charging amount comprises: determining a target residual refrigerant amount according to the acquired reserve refrigerant amount of the refrigerant reserve tank and the refrigerant charging amount; opening the valve of the refrigerant reserve tank and detecting a current residual refrigerant amount of the refrigerant reserve tank in real time; when the current residual refrigerant amount is less than or equal to the target residual refrigerant amount, closing the valve of the refrigerant reserve tank.

4. An air conditioner refrigerant charging device characterized by comprising: The method comprises the following steps: a detection unit configured to detect a current refrigerant mass flow of the air conditioner; a determination unit configured to acquire a preset standard refrigerant mass flow of the air conditioner and determine whether the air conditioner needs to be charged with refrigerant according to the preset standard refrigerant mass flow and the current refrigerant mass flow; a control unit configured to, if the air conditioner needs to be charged with refrigerant, open a valve of a refrigerant reserve tank to charge the refrigerant; the determination unit comprises: a first detection unit configured to, when the air conditioner is in a refrigerant sufficient state and operates according to a preset operating condition, detect initial refrigerant mass flows at multiple refrigerant outlet positions of a condenser; The first determining unit is configured to determine the preset standard refrigerant mass flow rate according to a plurality of initial refrigerant mass flow rates; The second determining unit is configured to determine the preset standard refrigerant mass flow rate according to a number of refrigerant outlets and lower limit values of the plurality of initial refrigerant mass flow rates, wherein each of the initial refrigerant mass flow rates comprises an upper limit value and a lower limit value; The judging unit further comprises: The first judging unit is configured to judge whether the current refrigerant mass flow rate is less than a preset standard refrigerant mass flow rate; The second judging unit is configured to, if the current refrigerant mass flow rate is less than the preset standard refrigerant mass flow rate, judge whether the current refrigerant mass flow rate is less than a preset refrigerant leakage value, wherein the preset refrigerant leakage value is determined by the preset standard refrigerant mass flow rate; The charging unit is configured to, if the current refrigerant mass flow rate is less than the preset refrigerant leakage value, determine that the air conditioner needs to be charged with refrigerant.

5. An air conditioner characterized by comprising: The air conditioner comprises a memory and a processor, the memory has a computer program stored thereon, and the processor implements the method according to any one of claims 1-3 when executing the computer program.

6. A storage medium, characterized by The storage medium has a computer program stored thereon, the computer program comprises program instructions, and the program instructions can implement the method according to any one of claims 1-3 when executed by a processor.

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