Valve control method, controller, air conditioner and computer readable storage medium

Abstract

Embodiments of the present application provide a valve control method, a controller, an air conditioner and a computer readable storage medium, wherein the valve control method is used to control a cut-off valve of a servo mechanism, the cut-off valve is used to be arranged in a refrigerant pipeline between an outdoor unit and an indoor unit; the valve control method comprises: obtaining a power requirement state of the outdoor unit; when the power requirement state changes, adjusting a switching state of a compressor; after the compressor is controlled to maintain the adjusted switching state for a target time length, adjusting a power supply state of the cut-off valve. Since the cut-off valve is controlled only after the compressor maintains the adjusted switching state for the target time length in the embodiments of the present application, it is ensured that the suction and discharge pressure difference can reach the pressure difference requirement of the cut-off valve action after the target time length, thereby reducing the problem that the cut-off valve cannot act, and improving the reliability of the cut-off valve in realizing the conduction and cut-off functions.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to a valve control method, a controller, an air conditioner, and a computer-readable storage medium. Background Technology

[0002] In related technologies, with increasing emphasis on environmental protection, environmentally friendly refrigerants are becoming the future trend in refrigeration. However, environmentally friendly refrigerants are generally flammable, and preventing leaks of flammable refrigerants is a key technology for their application. To ensure the safe use of flammable refrigerants, leaks must be stopped at the outdoor unit, and the outdoor unit must remain closed when powered off. Therefore, a new type of servo-mechanism shut-off valve has emerged on the market, capable of stopping refrigerant leaks at the outdoor unit. The servo-mechanism shut-off valve operates by using the pressure difference between the intake and exhaust gases to actuate the valve body. Since the pressure difference cannot be guaranteed, the shut-off valve may fail to operate, thus failing to achieve its opening and closing functions. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a valve control method, controller, air conditioner, and computer-readable storage medium, aiming to improve the reliability of a shut-off valve in achieving its opening and shut-off functions.

[0004] In a first aspect, embodiments of this application provide a valve control method for controlling a shut-off valve of a servo mechanism, the shut-off valve being used in a refrigerant pipeline installed between an outdoor unit and an indoor unit; the valve control method includes:

[0005] Obtain the energy demand status of the outdoor unit;

[0006] When the energy demand state changes, adjust the on / off state of the compressor;

[0007] After the compressor is kept in the adjusted on / off state for the target duration, the power supply state of the shut-off valve is adjusted.

[0008] According to some embodiments of this application, the target duration is obtained through the following steps:

[0009] Obtain the energy demand change type and outdoor ambient temperature of the outdoor unit;

[0010] The target duration is determined based on the energy demand change type and the outdoor ambient temperature.

[0011] According to some embodiments of this application, determining the target duration based on the energy demand change type and the outdoor ambient temperature includes:

[0012] The energy demand change type is determined to be a change from no energy demand to energy demand;

[0013] When the outdoor ambient temperature is greater than the first preset temperature, the target duration is set to the first duration;

[0014] When the outdoor ambient temperature is less than or equal to the first preset temperature, the target duration is set to a second duration, wherein the second duration is longer than the first duration.

[0015] According to some embodiments of this application, determining the target duration based on the energy demand change type and the outdoor ambient temperature includes:

[0016] The energy demand change type is determined to be a change from having energy demand to having no energy demand;

[0017] When the outdoor ambient temperature is greater than the second preset temperature, the target duration is set to the third duration;

[0018] When the outdoor ambient temperature is less than or equal to the second preset temperature, the target duration is set to a fourth duration, wherein the fourth duration is less than the third duration.

[0019] According to some embodiments of this application, adjusting the on / off state of the compressor includes one of the following:

[0020] When the energy demand state changes from no energy demand to energy demand, the compressor is controlled to start;

[0021] When the energy demand state changes from having energy demand to having no energy demand, the compressor is controlled to stop.

[0022] According to some embodiments of this application, after the compressor is started, the valve control method further includes:

[0023] When the energy demand state changes from no energy demand to heating energy demand, the four-way valve is controlled to switch and maintain the target duration.

[0024] According to some embodiments of this application, adjusting the power supply state of the shut-off valve includes one of the following:

[0025] When the energy demand state changes from no energy demand to energy demand, power is supplied to the shut-off valve to drive the shut-off valve to open;

[0026] When the energy demand state changes from having energy demand to having no energy demand, the power to the shut-off valve is cut off to drive the shut-off valve to close.

[0027] Secondly, embodiments of this application also provide a controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the valve control method as described in the first aspect above when running the computer program.

[0028] Thirdly, embodiments of this application provide an air conditioner, including the controller described in the second aspect above.

[0029] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for performing the valve control method as described in the first aspect above.

[0030] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: The valve control method of the embodiments of this application is used to control the shut-off valve of the servo mechanism, which is used in the refrigerant pipeline between the outdoor unit and the indoor unit; wherein, the valve control method includes the following steps: obtaining the energy demand status of the outdoor unit; when the energy demand status changes, adjusting the on / off state of the compressor; controlling the compressor to maintain the adjusted on / off state for a target duration, and then adjusting the power supply status of the shut-off valve. Since the embodiments of this application control the shut-off valve only after maintaining the adjusted on / off state of the compressor for a target duration, it ensures that the suction and discharge pressure difference can reach the pressure difference requirement for the shut-off valve to operate after the target duration, thereby reducing the problem of the shut-off valve failing to operate and improving the reliability of the shut-off valve in realizing the conduction and shut-off functions.

[0031] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0032] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0033] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of this application;

[0034] Figure 2 This is a flowchart of a valve control method provided in one embodiment of this application;

[0035] Figure 3 This is a flowchart of a valve control method provided in another embodiment of this application;

[0036] Figure 4 This is a flowchart of a valve control method provided in another embodiment of this application;

[0037] Figure 5 This is a flowchart of a valve control method provided in another embodiment of this application;

[0038] Figure 6 This is a flowchart of a valve control method provided in another embodiment of this application;

[0039] Figure 7 This is a flowchart of a valve control method provided in another embodiment of this application;

[0040] Figure 8 This is a flowchart of a valve control method provided in another embodiment of this application;

[0041] Figure 9 This is a flowchart of a valve control method provided in another embodiment of this application;

[0042] Figure 10 This is a flowchart of a valve control method provided in another embodiment of this application;

[0043] Figure 11 This is a schematic diagram of a controller for performing a valve control method according to an embodiment of this application. Detailed Implementation

[0044] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0045] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0047] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0048] In some cases, as environmental protection gains increasing attention, environmentally friendly refrigerants will become the future trend in refrigeration. However, these refrigerants are generally flammable, and preventing their leakage is a key technology for their application. To ensure the safe use of flammable refrigerants, leaks must be stopped at the outdoor unit, and this unit must remain closed when power is off. Therefore, a new type of shut-off valve with a servo mechanism has emerged, capable of stopping refrigerant flow at the outdoor unit. However, this servo mechanism shut-off valve operates by using the pressure difference between the intake and exhaust gases to actuate the valve body. Since the pressure difference cannot be guaranteed, the shut-off valve may fail to operate, thus preventing the valve from performing its opening and closing functions.

[0049] Based on the above, this application proposes a valve control method, a controller, an air conditioner, and a computer-readable storage medium, aiming to improve the reliability of shut-off valves in achieving their opening and shut-off functions.

[0050] The various embodiments of the air conditioner of this application will be further described below with reference to the accompanying drawings.

[0051] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of this application.

[0052] In one embodiment, the air conditioner of this application includes, but is not limited to, an outdoor unit, an indoor unit 170, and a shut-off valve 140, wherein the outdoor unit and the indoor unit 170 are connected by a refrigerant pipeline, and the shut-off valve 140 is installed on the refrigerant pipeline.

[0053] It should be noted that the structure of the aforementioned shut-off valve 140 is a servo mechanism, and its specific working principle is as follows: a small valve is electrically controlled, and the small valve is forcibly controlled to open and close through a coil; the small valve leads the intake and exhaust air to the two ends of the large valve respectively, and the large valve is pushed by relying on the pressure difference between the intake and exhaust air.

[0054] In another embodiment, the outdoor unit includes, but is not limited to, a compressor 110, an outdoor heat exchanger 130, and an outdoor fan, while the indoor unit 170 includes, but is not limited to, an indoor heat exchanger and an indoor fan. The compressor 110, the outdoor heat exchanger 130, and the indoor heat exchanger form a refrigerant circulation loop.

[0055] It should be noted that, regarding the installation location of the aforementioned shut-off valve 140, in order to lock the refrigerant in the outdoor unit, the shut-off valve 140 needs to be installed at both ends of the outdoor unit, that is, at least two shut-off valves 140 are required. One shut-off valve 140 is installed on the refrigerant line between the outdoor heat exchanger 130 and the indoor heat exchanger, and the other shut-off valve 140 is installed on the refrigerant line between the indoor heat exchanger and the compressor 110.

[0056] In another embodiment, the outdoor unit also includes, but is not limited to, a four-way valve 120 and a gas-liquid separator 180. The four-way valve 120 has four ports: the first port is connected to the exhaust port of the compressor 110, the second port is connected to the outdoor heat exchanger 130, the third port is connected to the return port of the compressor 110 through the gas-liquid separator 180, and the fourth port is connected to the indoor unit 170 through a refrigerant pipeline.

[0057] In another embodiment, the air conditioner of this application embodiment also includes, but is not limited to, an electronic expansion valve 150 and a shut-off valve 160, wherein the electronic expansion valve 150 and the shut-off valve 160 are disposed on the refrigerant pipeline between the outdoor heat exchanger 130 and the indoor heat exchanger.

[0058] Based on the hardware structure of the air conditioner in the above embodiments, the following presents various embodiments of the valve control method of this application.

[0059] like Figure 2 As shown, Figure 2 This is a flowchart of a valve control method provided in one embodiment of this application; the valve control method is used to control the shut-off valve of a servo mechanism, and may include, but is not limited to, steps S210, S220 and S230.

[0060] Step S210: Obtain the energy demand status of the outdoor unit;

[0061] Step S220: When the energy demand state changes, adjust the on / off state of the compressor;

[0062] Step S230: After the compressor is kept in the adjusted on / off state for the target duration, adjust the power supply state of the shut-off valve.

[0063] In one embodiment, firstly, the energy demand status of the outdoor unit is acquired in real time, and it is determined whether the energy demand status of the outdoor unit has changed; then, if the energy demand status of the outdoor unit changes, the switching status of the compressor and the power supply status of the shut-off valve need to be adjusted. The adjustment process is as follows: first, the switching status of the compressor is adjusted, and after maintaining the adjusted switching status of the compressor for a period of time, the power supply status of the shut-off valve is adjusted.

[0064] It is worth noting that, since the embodiments of this application control the shut-off valve only after maintaining the compressor in the adjusted on / off state for the target duration, the suction and discharge pressure difference can reach the pressure difference requirement for the shut-off valve to operate after the target duration, thereby reducing the problem of the shut-off valve failing to operate and improving the reliability of the shut-off valve in realizing the conduction and shut-off functions.

[0065] It should be noted that the energy demand state mentioned above can be a state with no energy demand, a state with cooling energy demand, or a state with heating energy demand. This application embodiment does not specifically limit the type of the energy demand state mentioned above.

[0066] Additionally, it should be noted that the aforementioned change type of energy demand state can refer to a change from no energy demand state to a cooling energy demand state, a change from no energy demand state to a heating energy demand state, a change from a cooling energy demand state to a no energy demand state, or a change from a heating energy demand state to a no energy demand state. This application embodiment does not specifically limit the aforementioned change type of energy demand state.

[0067] It is understood that the above-mentioned compressor switching state can refer to the on state or the off state. This application embodiment does not specifically limit the type of the compressor switching state.

[0068] In addition, it is understood that the power supply state of the aforementioned shut-off valve can refer to either the energized state or the de-energized state. This application embodiment does not specifically limit the type of power supply state of the aforementioned shut-off valve.

[0069] Additionally, it should be noted that the target duration mentioned above can be a pre-set fixed duration or a duration determined based on the actual operating status of the air conditioner. This application embodiment does not specifically limit the method of obtaining the target duration.

[0070] In addition, such as Figure 3 As shown, Figure 3 This is a flowchart of a valve control method provided in another embodiment of this application; the process of obtaining the target duration may include, but is not limited to, steps S310 and S320.

[0071] Step S310: Obtain the energy demand change type of the outdoor unit and the outdoor ambient temperature;

[0072] Step S320: Determine the target duration based on the type of energy demand change and the outdoor ambient temperature.

[0073] In one embodiment, when the target duration is determined based on the actual operating status of the air conditioner, the process of obtaining the target duration can be as follows: First, the energy demand change type of the outdoor unit can be obtained, and the outdoor ambient temperature can be detected by a temperature sensor; then, the specific target duration will be determined based on the energy demand change type and the outdoor ambient temperature.

[0074] It should be noted that the target duration mentioned above can refer to a numerical value or a time period, and this application embodiment does not specifically limit it.

[0075] It should be noted that the determination of the target duration based on the type of energy demand change and the outdoor ambient temperature in step S320 above may include, but is not limited to, the following: Figure 4 or Figure 5 The two implementation scenarios are as follows:

[0076] like Figure 4 As shown, Figure 4 This is a flowchart of a valve control method provided in another embodiment of this application; regarding the above step S320, it may include, but is not limited to, steps S410, S420 and S430.

[0077] Step S410: Determine the type of energy demand change from no energy demand to energy demand;

[0078] Step S420: When the outdoor ambient temperature is greater than the first preset temperature, set the target duration to the first duration;

[0079] Step S430: When the outdoor ambient temperature is less than or equal to the first preset temperature, the target duration is set to the second duration, wherein the second duration is greater than the first duration.

[0080] In one embodiment, regarding the process of obtaining the target duration, if the energy demand change type of the air conditioner changes from no energy demand to energy demand, that is, from a state of no energy demand to a state of cooling energy demand or from a state of no energy demand to a state of heating energy demand, then, in this embodiment of the application, the outdoor ambient temperature is compared with a first preset temperature. If the outdoor ambient temperature is greater than the first preset temperature, then the first duration is taken as the target duration; if the outdoor ambient temperature is less than or equal to the first preset temperature, then the second duration is taken as the target duration, wherein the value of the first duration is less than the value of the second duration.

[0081] In other words, when the air conditioner changes from having no energy demand to having energy demand, if the outdoor ambient temperature is high, the target duration should be set to a smaller value; if the outdoor ambient temperature is low, the target duration should be set to a larger value.

[0082] It is understood that the aforementioned first preset temperature can be a pre-set temperature, and the embodiments of this application do not specifically limit the value of the aforementioned first preset temperature.

[0083] In another embodiment, the first preset temperature corresponding to the change of the air conditioner from no energy demand to cooling energy demand is lower than the first preset temperature corresponding to the change of the air conditioner from no energy demand to heating energy demand.

[0084] In another embodiment, the first time for the air conditioner to switch from no energy demand to cooling energy demand is greater than the first time for the air conditioner to switch from no energy demand to heating energy demand.

[0085] In another embodiment, the second time period corresponding to the air conditioner changing from no energy demand to cooling energy demand is greater than the second time period corresponding to the air conditioner changing from no energy demand to heating energy demand.

[0086] like Figure 5 As shown, Figure 5 This is a flowchart of a valve control method provided in another embodiment of this application; regarding the above step S320, it may include, but is not limited to, steps S510, S520 and S530.

[0087] Step S510: Determine the type of energy demand change from having energy demand to having no energy demand;

[0088] Step S520: When the outdoor ambient temperature is greater than the second preset temperature, set the target duration to the third duration;

[0089] Step S530: When the outdoor ambient temperature is less than or equal to the second preset temperature, the target duration is set to the fourth duration, wherein the fourth duration is less than the third duration.

[0090] In one embodiment, regarding the process of obtaining the target duration, if the energy demand change type of the air conditioner changes from having energy demand to having no energy demand, that is, from cooling energy demand state to having no energy demand state or from heating energy demand state to having no energy demand state, then, this embodiment of the application will compare the outdoor ambient temperature and the second preset temperature. If the outdoor ambient temperature is greater than the second preset temperature, then the third duration will be used as the target duration; if the outdoor ambient temperature is less than or equal to the second preset temperature, then the fourth duration will be used as the target duration, wherein the value of the third duration must be greater than the value of the fourth duration.

[0091] In other words, when the air conditioner changes from having energy demand to having no energy demand, if the outdoor ambient temperature is high, the target duration should be set to a larger value; if the outdoor ambient temperature is low, the target duration should be set to a smaller value.

[0092] It is understood that the aforementioned second preset temperature can be a pre-set temperature, and the embodiments of this application do not specifically limit the value of the aforementioned second preset temperature.

[0093] In another embodiment, the second preset temperature corresponding to the change from cooling energy demand to no energy demand of the air conditioner is higher than the second preset temperature corresponding to the change from heating energy demand to no energy demand of the air conditioner.

[0094] In another embodiment, the third time period corresponding to the change from cooling energy demand to no energy demand of the air conditioner is longer than the third time period corresponding to the change from heating energy demand to no energy demand of the air conditioner.

[0095] In another embodiment, the fourth time period corresponding to the change from cooling energy demand to no energy demand of the air conditioner is longer than the fourth time period corresponding to the change from heating energy demand to no energy demand of the air conditioner.

[0096] It should be noted that adjusting the compressor's on / off state in step S220 above may include, but is not limited to, the following: Figure 6 or Figure 7 The two implementation scenarios are as follows:

[0097] like Figure 6 As shown, Figure 6 This is a flowchart of a valve control method provided in another embodiment of this application; regarding the adjustment of the compressor's on / off state in step S220 above, it may include, but is not limited to, steps S610 and S620.

[0098] Step S610: When the energy demand state changes from no energy demand to energy demand;

[0099] Step S620: Control the compressor to start.

[0100] like Figure 7 As shown, Figure 7 This is a flowchart of a valve control method provided in another embodiment of this application; regarding the adjustment of the compressor's on / off state in step S220 above, it may include, but is not limited to, steps S710 and S720.

[0101] Step S710: When the energy demand state changes from having energy demand to having no energy demand;

[0102] Step S720: Control the compressor to stop.

[0103] In one embodiment, if the energy demand change type of the air conditioner changes from no energy demand to energy demand, then the compressor can be turned on; if the energy demand change type of the air conditioner changes from energy demand to no energy demand, then the compressor can be turned off.

[0104] In addition, such as Figure 8 As shown, Figure 8 This is a flowchart of a valve control method provided in another embodiment of this application; the valve control method in this application may also include, but is not limited to, steps S810 and S820.

[0105] Step S810: Control the compressor to start;

[0106] Step S820: When the energy demand state changes from no energy demand to heating energy demand, control the four-way valve to switch and maintain the target duration.

[0107] In one embodiment, based on the above Figure 7 and Figure 8 The procedure involves the following steps: after starting the compressor, if the air conditioner is currently switching to heating mode, then the four-way valve needs to be switched to change the direction of refrigerant flow. Only after the four-way valve has switched to the desired position for the specified duration should the power supply to the shut-off valve be adjusted.

[0108] It should be noted that the adjustment of the power supply status of the shut-off valve in step S230 above may include, but is not limited to, the following: Figure 9 or Figure 10 The two implementation scenarios are as follows:

[0109] like Figure 9 As shown, Figure 9 This is a flowchart of a valve control method provided in another embodiment of this application; regarding the adjustment of the power supply state of the shut-off valve in step S230 above, it may include, but is not limited to, steps S910 and S920.

[0110] Step S910: When the energy demand state changes from no energy demand to energy demand;

[0111] Step S920: Power the shut-off valve to drive it to open.

[0112] like Figure 10 As shown, Figure 10 This is a flowchart of a valve control method provided in another embodiment of this application; regarding the adjustment of the power supply state of the shut-off valve in step S230 above, it may include, but is not limited to, steps S1010 and S1020.

[0113] Step S1010: When the energy demand state changes from having energy demand to having no energy demand;

[0114] Step S1020: De-energize the shut-off valve to drive it to close.

[0115] In one embodiment, based on the above Figure 9 and Figure 10The method involves the following steps: If the outdoor unit changes from no refrigerant demand to refrigerant demand, it indicates that the compressor needs to run, i.e., refrigerant flow is required. In this embodiment, the shut-off valve will be powered on, and the shut-off valve will respond and open upon being energized. If the outdoor unit changes from refrigerant demand to no refrigerant demand, it indicates that the compressor needs to stop, i.e., refrigerant flow is not required. In order to lock some refrigerant in the outdoor unit to prevent refrigerant leakage into the indoor environment, the shut-off valve will be de-energized, and the shut-off valve will respond and close upon being de-energized.

[0116] Based on the valve control methods of the above embodiments, the overall embodiments of the valve control method of this application are presented below.

[0117] In one embodiment, the energizing conditions for the two-way shut-off valve are as follows:

[0118] 1.1 When the outdoor unit goes from having no cooling demand to requiring cooling (including the first start-up of the outdoor unit, or the restart of the outdoor unit after all indoor units have reached their temperature and shut down):

[0119] ①When the outdoor ambient temperature T4 is greater than a, the compressor starts after time t1;

[0120] ②When the outdoor ambient temperature T4 is less than or equal to a, the compressor starts after time t2;

[0121] The value of a can be in the range of 0-25℃, where a can be 20℃; the value of t1 can be in the range of 0-15 seconds, where t1 can be 10 seconds; the value of t2 can be in the range of 5-25 seconds, where t2 can be 15 seconds; in addition, t1 < t2 must be satisfied.

[0122] Based on the above control conditions, on the one hand, the pressure difference is established after the compressor starts to ensure successful switching, and on the other hand, the noise problem caused by excessive switching pressure difference needs to be controlled. Therefore, the temperature range is divided according to the outdoor ambient temperature to ensure that the two-way shut-off valve can switch normally, while suppressing switching noise.

[0123] 1.2 When the outdoor unit changes from having no energy demand to having heating demand:

[0124] ①When the outdoor ambient temperature T4 is greater than b, the compressor starts and the four-way valve reverses after starting, time t3;

[0125] ②When the outdoor ambient temperature T4 is less than or equal to b, the time t4 is after the compressor starts and the four-way valve reverses.

[0126] The value of b can be in the range of -5 to 10℃, where b can be 0℃; the value of t3 can be in the range of 0 to 10 seconds, where t3 can be 5 seconds; the value of t4 can be in the range of 5 to 25 seconds, where t4 can be 10 seconds; in addition, t3 must be less than t4.

[0127] Based on the above control conditions, on the one hand, the pressure difference is established after the compressor starts to ensure successful switching, and on the other hand, the noise problem caused by excessive switching pressure difference needs to be controlled. Therefore, the temperature range is divided according to the outdoor ambient temperature to ensure that the two-way shut-off valve can switch normally, while suppressing switching noise.

[0128] It should be noted that the sequence of operation for each component is as follows: the compressor starts, the four-way valve reverses after a period of time, and then the two-way shut-off valve reverses after another period of time. Both the four-way valve and the two-way shut-off valve require a pressure difference between the high and low pressures to operate. However, the compressor's suction and discharge flows directly when the four-way valve is pushed, which may result in a short period without a pressure difference. The priority shut-off valve, being in the closed state, more easily establishes a suction and discharge pressure difference, resulting in better rapid heating of the indoor unit compared to the entire time the two-way valve is pushed.

[0129] In another embodiment, the power-off conditions for the two-way shut-off valve are as follows:

[0130] 2.1 Outdoor unit time from cooling demand to no cooling (compressor from operation to shutdown; because the compressor is not running, the two-way valve cannot be closed when the power is cut off, and it cannot be guaranteed to close at any time when the power is cut off. It is necessary to cut off the power to the two-way valve and recover the combustible refrigerant to the outdoor unit every time the compressor is turned off):

[0131] ①When the outdoor ambient temperature T4 is greater than c, the compressor shuts down after time t5.

[0132] ②When the outdoor ambient temperature T4 is less than or equal to c, the compressor shuts down after time t6.

[0133] The value of c can be in the range of 0-25℃, where c can be 20℃; the value of t5 can be in the range of 10-60 seconds, where t5 can be 30 seconds; the value of t6 can be in the range of 5-25 seconds, where t6 can be 15 seconds; in addition, t6 must be less than t5.

[0134] Based on the above control conditions, on the one hand, after the compressor stops, the pressure difference will balance the high and low pressures for a period of time to ensure successful reversal. On the other hand, the noise problem caused by excessive reversal pressure difference needs to be controlled. Therefore, after the compressor stops, the two-way shut-off valve is closed after maintaining the pressure difference for a period of time.

[0135] 2.2 Time required for the outdoor unit to go from heating demand to no heating:

[0136] ① When the outdoor ambient temperature T4 is greater than d, the compressor shuts down after time t7.

[0137] ②When the outdoor ambient temperature T4 is less than or equal to d, the compressor shuts down after time t8.

[0138] The value of d can be -5 to 10℃, where d can be 0℃; the value of t7 can be 0 to 60 seconds, where t7 can be 15 seconds; the value of t8 can be 0 to 30 seconds, where t8 can be 10 seconds; in addition, t8 must be less than t7.

[0139] Based on the above control conditions, on the one hand, after the compressor stops, the pressure difference will balance the high and low pressures for a period of time to ensure successful reversal. On the other hand, the noise problem caused by excessive reversal pressure difference needs to be controlled. Therefore, after the compressor stops, the two-way shut-off valve is closed after maintaining the pressure difference for a period of time.

[0140] Additionally, it should be noted that during the heating season, if the heating system is not working, the four-way valve does not need to be closed and should generally remain powered on.

[0141] The valve control methods based on the above embodiments include, but are not limited to, the following technical effects: 1. The embodiments of this application can ensure that, in the case of a sudden power outage at any time, the two-way shut-off valve of an air conditioner containing flammable refrigerant remains in a closed state, and most of the refrigerant remains in the outdoor unit. 2. Even if refrigerant leakage occurs during a power outage, the leakage amount can be controlled within a reasonable level.

[0142] Based on the valve control methods of the above embodiments, the following presents various embodiments of the controller and computer-readable storage medium of this application.

[0143] like Figure 11 As shown, Figure 11 This is a schematic diagram of the structure of a controller for performing a valve control method according to an embodiment of this application. The controller 200 implemented in this application includes: a processor 210, a memory 220, and a computer program stored in the memory 220 and executable on the processor 210, wherein... Figure 11 The example uses a processor 210 and a memory 220.

[0144] The processor 210 and the memory 220 can be connected via a bus or other means. Figure 11 Taking the example of a connection between China and Israel via a bus.

[0145] Memory 220, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 220 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 220 may optionally include remotely located memories 220 relative to processor 210, which can be connected to controller 200 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0146] Those skilled in the art will understand that Figure 11 The device structure shown does not constitute a limitation on the controller 200 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0147] exist Figure 11 In the controller 200 shown, the processor 210 can be used to call the control program stored in the memory 220 to implement the valve control method described above. Specifically, the non-transient software program and instructions required to implement the valve control method of the above embodiment are stored in the memory 220, and when executed by the processor 210, the valve control method of the above embodiment is executed.

[0148] It is worth noting that, since the controller 200 of this application embodiment can execute the valve control method of any of the above embodiments, the specific implementation method and technical effect of the controller 200 of this application embodiment can refer to the specific implementation method and technical effect of the valve control method of any of the above embodiments.

[0149] Furthermore, one embodiment of this application provides a computer-readable storage medium storing computer-executable instructions for performing the valve control method described above. Exemplarily, the above-described method is executed... Figures 2 to 10 The methods and steps in the text.

[0150] It is worth noting that, since the computer-readable storage medium of this application embodiment can execute the valve control method of any of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of this application embodiment can be referred to the specific implementation and technical effects of the valve control method of any of the above embodiments.

[0151] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0152] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A valve control method, characterized in that, A shut-off valve for controlling the servo mechanism, the shut-off valve being used in the refrigerant pipeline between the outdoor unit and the indoor unit; the valve control method includes: Obtain the energy demand status of the outdoor unit; When the energy demand state changes, adjust the on / off state of the compressor; After the compressor is kept in the adjusted on / off state for the target duration, the power supply state of the shut-off valve is adjusted. The target duration is obtained through the following steps: Obtain the energy demand change type and outdoor ambient temperature of the outdoor unit; The target duration is determined based on the energy demand change type and the outdoor ambient temperature.

2. The valve control method according to claim 1, characterized in that, The step of determining the target duration based on the energy demand change type and the outdoor ambient temperature includes: The energy demand change type is determined to be a change from no energy demand to energy demand; When the outdoor ambient temperature is greater than the first preset temperature, the target duration is set to the first duration; When the outdoor ambient temperature is less than or equal to the first preset temperature, the target duration is set to a second duration, wherein the second duration is longer than the first duration.

3. The valve control method according to claim 1, characterized in that, The step of determining the target duration based on the energy demand change type and the outdoor ambient temperature includes: The energy demand change type is determined to be a change from having energy demand to having no energy demand; When the outdoor ambient temperature is greater than the second preset temperature, the target duration is set to the third duration; When the outdoor ambient temperature is less than or equal to the second preset temperature, the target duration is set to a fourth duration, wherein the fourth duration is less than the third duration.

4. The valve control method according to claim 1, characterized in that, Adjusting the on / off state of the compressor includes one of the following: When the energy demand state changes from no energy demand to energy demand, the compressor is controlled to start; When the energy demand state changes from having energy demand to having no energy demand, the compressor is controlled to stop.

5. The valve control method according to claim 4, characterized in that, After the compressor is started, the valve control method further includes: When the energy demand state changes from no energy demand to heating energy demand, the four-way valve is controlled to switch and maintain the target duration.

6. The valve control method according to claim 1, characterized in that, Adjusting the power supply status of the shut-off valve includes one of the following: When the energy demand state changes from no energy demand to energy demand, power is supplied to the shut-off valve to drive the shut-off valve to open; When the energy demand state changes from having energy demand to having no energy demand, the power to the shut-off valve is cut off to drive the shut-off valve to close.

7. A controller, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs the valve control method as described in any one of claims 1 to 6.

8. An air conditioner, characterized in that, Includes the controller as described in claim 7.

9. A computer-readable storage medium, characterized in that: The device stores computer-executable instructions for performing the valve control method as described in any one of claims 1 to 6.

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