Air conditioner control method, device and system, air conditioner equipment and storage medium

Abstract

The embodiment of the invention relates to an air conditioner control method, device and system, air conditioner equipment and a storage medium. The method comprises the steps that the working mode and working parameters of an air conditioner are obtained; determining a control strategy for a plurality of four-way valves, a plurality of control valves and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters; and according to the control strategy, the multiple four-way valves, the multiple control valves and the multiple throttling components are controlled, so that the connection states of the multiple heat exchangers in the control system are switched through the control strategy, or defrosting control is conducted on the multiple heat exchangers through the control strategy. A higher refrigerating effect can be achieved by switching the connecting state of the heat exchanger, or defrosting control of the heat exchanger is optimized, and efficient heating operation of the unit is ensured. Therefore, flow paths of the control system can be increased by adjusting the four-way valve, the control valve and the throttling component, so that the working efficiency of the air conditioner in different working modes is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of air conditioning technology, and in particular, to an air conditioning control method, device, system, air conditioning equipment, and storage medium. Background Art

[0002] In the control scenario of the outdoor heat exchanger of the air conditioner, solenoid valves are usually set between some liquid collecting pipes, some gas collecting pipes, and the heat exchanger flow path, and the parallel or series form of the heat exchange flow path is realized by changing the on and off of the solenoid valves. This method fails to take into account the rotation defrosting of the outdoor heat exchanger in the heating mode, fails to maximize the function of the heat exchanger under the series-parallel flow path, and fails to maximize the cooling capacity and defrosting capacity under different operating loads.

[0003] Therefore, the existing control method of the air conditioner heat exchanger adopts a single flow path in the cooling mode, which cannot maximize the condensation effect of the outdoor heat exchanger, resulting in the problem of limited cooling capacity. In the heating mode, the single flow path defrosting cannot achieve the effect of continuous indoor heating to improve indoor comfort. Therefore, how to increase the flow path of the air conditioning control system in different working modes to improve the working efficiency of the air conditioner. Summary of the invention

[0004] In view of this, in order to solve the above-mentioned technical problems or part of the technical problems, the embodiments of the present invention provide an air conditioning control method, device, system, air conditioning equipment and storage medium.

[0005] In a first aspect, an embodiment of the present invention provides an air conditioning control method, comprising:

[0006] Obtaining the working mode and working parameters of the air conditioner;

[0007] Determining a control strategy for a plurality of four-way valves, a plurality of control valves, and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters;

[0008] According to the control strategy, the multiple four-way valves, the multiple control valves and the multiple throttling components are controlled so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on the multiple heat exchangers through the control strategy.

[0009] In a possible implementation, when the working mode is a cooling mode and the working parameter is a load state of the air conditioner, determining a control strategy for a plurality of four-way valves, a plurality of control valves, and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameter includes:

[0010] When the load state is high load, determining the first control strategy, wherein the first control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in parallel;

[0011] When the load state is low load, the second control strategy is determined, and the second control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in series.

[0012] In a possible implementation, when the control strategy is the first strategy, controlling the plurality of four-way valves, the plurality of control valves, and the plurality of throttling components according to the control strategy includes:

[0013] The coil of the first four-way valve of the control system is powered off, and the D end and the C end of the first four-way valve are connected, and the E end and the S end are connected;

[0014] The coils of the second four-way valve and the third four-way valve of the control system are both energized, and the D end and the S end of the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0015] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0016] In a possible implementation, when the control strategy is the second strategy, controlling the plurality of four-way valves, the plurality of control valves, and the plurality of throttling components according to the control strategy includes:

[0017] The coils of the first four-way valve and the third four-way valve of the control system are powered off, and the D end and the C end of the first four-way valve and the third four-way valve are connected, and the E end and the S end are connected;

[0018] The coil of the second four-way valve of the control system is energized, and the D end and the S end of the second four-way valve are connected, and the C end and the E end are connected;

[0019] The first control valve of the control system is closed, the second control valve is opened, the first throttle component is closed, and the second throttle component is opened.

[0020] In a possible implementation, when the working mode is a heating mode and the working parameter is the ambient temperature of the outdoor environment where the air conditioner is currently located, determining the control strategy for multiple four-way valves, multiple control valves, and multiple throttling components in the control system of the air conditioner according to the working mode and the working parameter includes:

[0021] When the ambient temperature is greater than or equal to a first threshold, determining that the control strategy is a third strategy, wherein the third strategy is used to perform heating control on the air conditioner through the control system when the air conditioner is not frosted;

[0022] When the ambient temperature is less than a first threshold and greater than or equal to a second threshold, or the ambient temperature is less than a third threshold, the control strategy is determined to be a fourth strategy, and the fourth strategy is used to perform defrosting control on the plurality of heat exchangers of the control system according to a defrosting priority, the defrosting priority is negatively correlated with the pipe temperature of the heat exchanger, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold;

[0023] When the ambient temperature is less than the second threshold and greater than or equal to the third threshold, the control strategy is determined to be the first strategy.

[0024] In a possible implementation, when the control strategy is the third strategy, controlling the plurality of four-way valves, the plurality of control valves, and the plurality of throttling components according to the control strategy includes:

[0025] The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0026] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0027] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0028] In a possible implementation manner, when the control strategy is the fourth strategy, controlling the plurality of four-way valves, the plurality of control valves, and the plurality of throttling components according to the control strategy includes:

[0029] When the pipe temperature of the second heat exchanger reaches the target temperature first, determining that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger;

[0030] The coils of the first four-way valve, the second four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve, the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0031] Controlling the first control valve of the control system to close, the second control valve to open, and the first throttling component and the second throttling component to open;

[0032] or, when the pipe temperature of the first heat exchanger reaches the target temperature first, determining that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger;

[0033] The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0034] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0035] The first control valve of the control system is controlled to be open, the second control valve is closed, and the first throttle component and the second throttle component are opened.

[0036] In a possible implementation, the method further includes:

[0037] When the ambient temperature is within different threshold ranges within a preset time period, obtaining the duration that the ambient temperature is within each threshold range;

[0038] The control strategy is determined according to the ratio of each of the durations to the preset time period.

[0039] In a second aspect, an embodiment of the present invention provides an air conditioning control device, comprising:

[0040] An acquisition module, used to acquire the working mode and working parameters of the air conditioner;

[0041] A determination module, for determining a control strategy for a plurality of four-way valves, a plurality of control valves and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters;

[0042] A control module is used to control the multiple four-way valves, the multiple control valves and the multiple throttling components according to the control strategy, so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrost control on the multiple heat exchangers through the control strategy.

[0043] In a third aspect, an embodiment of the present invention provides an air conditioning control system, which is used to implement the air conditioning control method described in the first aspect, the system comprising: a gas-liquid separator, a compressor, three four-way valves, two throttling components, two outdoor heat exchangers, two control valves, a liquid pipe connecting pipe and a gas pipe connecting pipe, the four-way valve, the throttling component and the control valve are used to receive a control signal, and the control signal is used to control the four-way valve, the throttling component and the control valve according to a control strategy;

[0044] The outlet pipe end of the gas-liquid separator is connected to the suction side pipeline of the compressor, and the inlet pipe end is connected to the E end of the first four-way valve and the E end of the second four-way valve;

[0045] The compressor exhaust side pipeline is connected to the D end of the first four-way valve and the D end of the third four-way valve respectively;

[0046] The S end of the third four-way valve is connected to the D end of the second four-way valve, the E end is connected to the liquid collecting end of the first heat exchanger, and the C end is connected to the liquid pipe connecting pipe through the first throttling component;

[0047] The S end of the first four-way valve is connected to the gas pipe connecting pipe, and the C end is connected to the gas collecting end of the first heat exchanger through the second control valve;

[0048] The S end of the second four-way valve is connected to the gas collecting end of the second heat exchanger, and the C end is connected to the gas collecting end of the first heat exchanger through the first control valve;

[0049] The liquid collecting end of the second heat exchanger is connected to the liquid pipe connecting pipe through a second throttling component.

[0050] In a fourth aspect, an embodiment of the present invention provides an air conditioning device, comprising: a processor and a memory, wherein the processor is used to execute an air conditioning control program stored in the memory to implement the air conditioning control method described in any one of the first aspects above.

[0051] In a fifth aspect, an embodiment of the present invention provides a storage medium, wherein the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the air conditioning control method described in any one of the first aspects above.

[0052] The air conditioning control scheme provided by the embodiment of the present invention obtains the working mode and working parameters of the air conditioner; determines the control strategy for multiple four-way valves, multiple control valves and multiple throttling components in the control system of the air conditioner according to the working mode and the working parameters; controls the multiple four-way valves, multiple control valves and multiple throttling components according to the control strategy, so as to switch the connection status of multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on multiple heat exchangers through the control strategy. The four-way valves, control valves and throttling components in the air conditioning control system can be adjusted according to the current different working modes and working parameters of the air conditioner, so as to achieve a higher cooling effect by switching the connection status of the heat exchanger, or optimize the defrosting control of the heat exchanger to ensure efficient heating operation of the unit. In this way, the control system flow path can be increased by adjusting the four-way valves, control valves and throttling components to improve the working efficiency of the air conditioner under different working modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of an air conditioning control system provided by an embodiment of the present invention;

[0054] Figure 2 A schematic flow chart of an air conditioning control method provided by an embodiment of the present invention;

[0055] Figure 3 A schematic flow chart of another air conditioning control method provided by an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of the structure of an air conditioning control device provided by an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the structure of an air conditioning device provided by an embodiment of the present invention;

[0058] Figure 6 A schematic diagram of a first air conditioning control flow path provided by an embodiment of the present invention;

[0059] Figure 7 A schematic diagram of a second air conditioning control flow path provided by an embodiment of the present invention;

[0060] Figure 8 A schematic diagram of a third air conditioning control flow path provided by an embodiment of the present invention;

[0061] Fig. 9 A schematic diagram of a fourth air conditioning control flow path provided by an embodiment of the present invention;

[0062] Fig.10 A fifth air conditioning control flow path schematic diagram provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] To facilitate understanding of the embodiments of the present invention, specific embodiments will be further explained below in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present invention.

[0065] Figure 1 A schematic diagram of the structure of an air conditioning control system provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the system specifically includes:

[0066] Gas-liquid separator 1; compressor 2; three four-way valves: the first four-way valve 301, the second four-way valve 302, and the third four-way valve 303; two throttling components: the first throttling component 401 and the second throttling component 402; two outdoor heat exchangers: the first heat exchanger 501 and the second heat exchanger 502; two control valves: the first control valve 601 and the second control valve 602; a liquid pipe connecting pipe 7 and a gas pipe connecting pipe 8. The four-way valve, the throttling component and the control valve are used to receive control signals, and the control signals are used to control the on-off and connecting ports of the four-way valve, control the on-off of the throttling component, and control the refrigerant flow rate that can pass through the control valve according to the control strategy.

[0067] The outlet pipe end of the gas-liquid separator is connected to the suction side pipeline of the compressor, and the inlet pipe end is connected to the E end of the first four-way valve and the E end of the second four-way valve;

[0068] The compressor exhaust side pipeline is connected to the D end of the first four-way valve and the D end of the third four-way valve respectively;

[0069] The S end of the third four-way valve is connected to the D end of the second four-way valve, the E end is connected to the liquid collecting end of the first heat exchanger, and the C end is connected to the liquid pipe connecting pipe through the first throttling component;

[0070] The S end of the first four-way valve is connected to the gas pipe connecting pipe, and the C end is connected to the gas collecting end of the first heat exchanger through the second control valve;

[0071] The S end of the second four-way valve is connected to the gas collecting end of the second heat exchanger, and the C end is connected to the gas collecting end of the first heat exchanger through the first control valve;

[0072] The liquid collecting end of the second heat exchanger is connected to the liquid pipe connecting pipe through a second throttling component.

[0073] In this embodiment, the first throttling component 401 is used as a refrigerant flow control component of the outdoor first heat exchanger 501, and is connected to the outdoor first heat exchanger 501 through the third four-way valve 303, so as to control the flow and also control the on-off to realize the switching of the refrigeration series and parallel flow paths. The second throttling component 402 is used as a refrigerant flow control component of the outdoor second heat exchanger 502, and is directly connected to the outdoor second heat exchanger 502. Based on the outdoor second heat exchanger, the switching of the parallel and series flow paths of the outdoor first heat exchanger and the outdoor second heat exchanger in the cooling mode is realized by switching the valve components, which can be applied to the flow path switching control in multi-load scenarios to achieve more efficient cooling; in the heating mode, different flow paths can be switched for defrosting according to the degree of frost to ensure efficient heating operation of the unit.

[0074] Figure 2A flow chart of an air conditioning control method provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the method specifically includes:

[0075] S11. Obtaining the working mode and working parameters of the air conditioner.

[0076] The air conditioning control method provided by the embodiment of the present invention is applied to Figure 1 In the air-conditioning control system, the executing body can be the main control unit in the air-conditioning equipment (for example, CPU, etc.). The main control unit can generate a control strategy according to the current working mode and working parameters of the air-conditioning, and control and adjust multiple four-way valves, multiple control valves and multiple throttling components in the air-conditioning control system through the control strategy.

[0077] In this embodiment, the working modes of the air conditioner include a heating mode and a cooling mode. In the cooling mode, the working parameter may be the load state of the air conditioner, and in the heating mode, the working parameter may be the ambient temperature of the current operating environment of the air conditioner.

[0078] S12. Determine a control strategy for a plurality of four-way valves, a plurality of control valves, and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters.

[0079] S13. Control the multiple four-way valves, the multiple control valves and the multiple throttling components according to the control strategy, so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on the multiple heat exchangers through the control strategy.

[0080] In this embodiment, steps S12 and S13 are described uniformly. When the working mode is the cooling mode, it is determined whether the current load state is a high load state. The determination method can be to determine the user demand load by the rated cooling capacity of the indoor unit that is turned on and has the required capacity. When the user demand load ≥ the rated cooling capacity of the outdoor unit* When the system is determined to be in a high-load state, the current control strategy is to adjust multiple four-way valves, multiple control valves and multiple throttling components in the control system so that the connection state of the two heat exchangers in the control system is a parallel flow path; otherwise, the system is determined to be in a low-load state, and the current control strategy is to adjust multiple four-way valves, multiple control valves and multiple throttling components in the control system so that the connection state of the two heat exchangers in the control system is a series flow path. is the capacity requirement coefficient, which is usually taken as 75%.

[0081] When the working mode is the heating mode, the threshold range of the current ambient temperature is determined, and whether the current heat exchanger is frosted and defrosted, as well as the frosting state (for example, heavy frosting, light frosting) are determined according to the threshold range. The corresponding control strategy can be determined according to the threshold range of the current ambient temperature. Specifically, when there is no frost at present, the control strategy is to adjust multiple four-way valves, multiple control valves and multiple throttling components in the control system so that the control system maintains a normal heating operation flow path. When frosting is currently occurring, it is determined whether the current state is heavy frosting or light frosting according to the threshold range, and the corresponding control strategy is determined according to the judgment result to adjust multiple four-way valves, multiple control valves and multiple throttling components in the control system so that the control system generates different defrosting flow paths to achieve defrosting control of multiple heat exchangers.

[0082] The air conditioning control method provided by the embodiment of the present invention obtains the working mode and working parameters of the air conditioner; determines the control strategy for multiple four-way valves, multiple control valves and multiple throttling components in the control system of the air conditioner according to the working mode and the working parameters; controls the multiple four-way valves, multiple control valves and multiple throttling components according to the control strategy, so as to switch the connection status of multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on multiple heat exchangers through the control strategy. The four-way valves, control valves and throttling components in the air conditioning control system can be adjusted according to the current different working modes and working parameters of the air conditioner, so as to achieve a higher cooling effect by switching the connection status of the heat exchanger, or optimize the defrosting control of the heat exchanger to ensure efficient heating operation of the unit. In this way, the control system flow path can be increased by adjusting the four-way valves, control valves and throttling components to improve the working efficiency of the air conditioner under different working modes.

[0083] Figure 3 A flow chart of another air conditioning control method provided by an embodiment of the present invention is shown as follows: Figure 3 As shown, the method specifically includes:

[0084] S21. Obtain the working mode and working parameters of the air conditioner.

[0085] In this embodiment, similar to step S11, the specific Figure 1 For the sake of brevity, the relevant content will not be elaborated here.

[0086] S22. When the working mode is the cooling mode and the load state is high load, a first control strategy is determined. The first control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in parallel.

[0087] S23, the coil of the first four-way valve of the control system loses power, the D end and the C end of the first four-way valve are connected, and the E end and the S end are connected; the coils of the second four-way valve and the third four-way valve of the control system are both energized, the D end and the S end of the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected; the first control valve of the control system is closed, the second control valve is opened, and the first throttling component and the second throttling component are opened.

[0088] In this embodiment, steps S22 and S23 are described uniformly. To meet the requirements of efficient cooling under different operating loads, two flow paths can be switched in the cooling mode. When the load is high, the control system uses the parallel flow path of the cooling mode. When the load is low or medium, the control system uses the series flow path of the cooling mode. When the load is high, the control strategy is determined to be the first strategy.

[0089] Further, such as Figure 6 FIG. 1 is a schematic diagram of a first air conditioning control flow path provided by an embodiment of the present invention. Figure 6 It is the parallel flow path of the heat exchanger in cooling mode. In this flow path, the coil of the first four-way valve is powered off, the D end is connected to the C end, and the E end is connected to the S end; the coils of the second four-way valve and the third four-way valve are powered, the D end is connected to the S end, and the C end is connected to the E end. The second control valve is open, and the first control valve is closed. The first throttling component is open, and the second throttling component is open. The gaseous refrigerant returned from the indoor unit returns to the gas-liquid separator through the gas pipe connecting pipe for gas-liquid separation, and then enters the compressor for compression. The high-temperature and high-pressure refrigerant is divided into two paths. One path passes through the DC end of the first four-way valve and the second control valve to enter the outdoor first heat exchanger for condensation. The condensed refrigerant enters the CE end of the third four-way valve through the first throttling component and returns to the liquid pipe connecting pipe; the other path passes through the DS end of the third four-way valve to the DS end of the second four-way valve and enters the outdoor second heat exchanger for condensation. The condensed refrigerant returns to the liquid pipe connecting pipe through the second throttling component. At this time, both refrigerants merge at the liquid pipe connection pipe and enter the indoor side. This can achieve the control of the two heat exchangers to form parallel flow paths under high load conditions in the cooling mode, thereby improving the cooling efficiency.

[0090] S24. When the load state is low load, determine the second control strategy, the second strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in series.

[0091] S25, the coils of the first four-way valve and the third four-way valve of the control system are powered off, the D end and the C end of the first four-way valve and the third four-way valve are connected, and the E end and the S end are connected; the coil of the second four-way valve of the control system is powered on, the D end and the S end of the second four-way valve are connected, and the C end and the E end are connected; the first control valve of the control system is closed, the second control valve is opened, the first throttling component is closed, and the second throttling component is opened.

[0092] In this embodiment, steps S24 and S25 are described uniformly, as follows: Figure 7 FIG. 1 is a schematic diagram of a second air conditioning control flow path provided by an embodiment of the present invention. Figure 7 It is the series flow path of the heat exchanger in the cooling mode. When the load state is low load, the second control strategy is determined to generate a series flow path of the heat exchanger for the control system in the cooling mode. In this flow path, the coils of the 1st four-way valve and the 3rd four-way valve are powered off, the D end is connected to the C end, and the E end is connected to the S end; the coil of the 2nd four-way valve is powered on, the D end is connected to the S end, and the C end is connected to the E end. The 2nd control valve is opened and the 1st control valve is closed. The 1st throttling component is closed and the 2nd throttling component is opened. The gaseous refrigerant returned from the indoor unit returns to the gas-liquid separator through the gas pipe connecting pipe for gas-liquid separation, and then the gaseous refrigerant enters the compressor for compression. The high-temperature and high-pressure refrigerant passes through the DC end of the 1st four-way valve and the 2nd control valve into the outdoor 1st heat exchanger for primary condensation. The condensed refrigerant enters the SE end of the 3rd four-way valve, and then enters the outdoor 2nd heat exchanger through the DS end of the 2nd four-way valve for secondary condensation. The condensed refrigerant returns to the liquid pipe connecting pipe through the second throttling component, and then enters the indoor side to achieve refrigeration. In this way, the two heat exchangers can be controlled to form a series flow path under low load conditions in the cooling mode, thereby improving the cooling efficiency.

[0093] S26. When the working mode is the heating mode and the ambient temperature is greater than or equal to the first threshold, the control strategy is determined to be the third strategy, and the third strategy is used to control the heating of the air conditioner through the control system when the air conditioner is not frosted.

[0094] S27, the coils of the first four-way valve and the third four-way valve of the control system are energized, the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected; the coil of the second four-way valve of the control system is de-energized, the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected; the first control valve of the control system is closed, the second control valve is opened, and the first throttling component and the second throttling component are opened.

[0095] In this embodiment, steps S26 and S27 are described uniformly, and the outdoor ambient temperature Te in the heating mode is detected. The first threshold is Ta. When Te≥Ta, it can be determined that the control strategy is the third strategy, that is, there is no frost on the outdoor heat exchanger, and the control system adopts the heating operation flow path to achieve normal heating control of the air conditioner.

[0096] like Figure 8The third air conditioning control flow path schematic diagram provided by the embodiment of the present invention is shown. In this flow path, the first four-way valve and the third four-way valve coil are energized, the D end is connected to the S end, and the C end is connected to the E end; the second four-way valve coil is powered off, the D end is connected to the C end, and the S end is connected to the E end. The second control valve is opened and the first control valve is closed. The first throttling component is opened and the second throttling component is opened. The liquid refrigerant returned from the indoor unit is divided into two paths through the liquid pipe connecting pipe. One path enters the CE end of the third four-way valve through the first throttling component, and then returns to the outdoor first heat exchanger for evaporation. The evaporated low-pressure gaseous refrigerant enters the CE end of the first four-way valve through the second control valve, and then returns to the inlet pipe of the gas-liquid separator. The other path enters the outdoor second heat exchanger for evaporation through the second throttling component. The evaporated low-pressure gaseous refrigerant enters the SE end of the second four-way valve and returns to the inlet pipe of the gas-liquid separator. The two refrigerants merge at the inlet of the gas-liquid separator, enter the compressor through the gas-liquid separator, and the high-pressure refrigerant compressed by the compressor enters the gas pipe connecting pipe through the DS end of the first four-way valve, and then enters the indoor side to achieve heating. In this way, the heating efficiency can be improved by switching the heating flow path.

[0097] S28. When the ambient temperature is less than the first threshold and greater than or equal to the second threshold, or the ambient temperature is less than the third threshold, the control strategy is determined to be the fourth strategy. The fourth strategy is used to perform defrost control on the multiple heat exchangers of the control system according to the defrost priority. The defrost priority is negatively correlated with the pipe temperature of the heat exchanger. The first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

[0098] In this embodiment, when Te<Ta, the outdoor heat exchanger may be frosted. The defrosting flow path is determined in combination with the outdoor working conditions and the attenuation degree, specifically including: light frosting and heavy frosting. The following is the light frosting situation:

[0099] The second threshold is Tb, and the third threshold is Tc. If Tb≤Te<Ta, or Te<Tc, this interval is a lightly frosted area of ​​the outdoor heat exchanger, and the control strategy is determined to be the fourth strategy. The fourth strategy is used to control the defrosting of multiple heat exchangers in the control system according to the defrosting priority. Rotational defrosting can be used for the two outdoor heat exchangers. The defrosting priority is determined by detecting the pipe temperatures of the heat exchangers of the two outdoor heat exchangers. The heat exchanger whose pipe temperature reaches the preset defrosting temperature threshold A the fastest is defrosted first. After the defrosting of the heat exchanger is completed, the other heat exchanger is defrosted. When the second heat exchanger is defrosted, it is restored to Figure 8 The heating flow path is used for normal heating control. This cycle runs. During the defrosting period, the indoor unit fan runs and the indoor unit continues to heat. Among them, Tc<Tb<Ta.

[0100] S29. When the pipeline temperature of the second heat exchanger reaches the target temperature first, it is determined that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger; the coils of the first four-way valve, the second four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve, the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected; the first control valve of the control system is closed, the second control valve is opened, and the first throttling component and the second throttling component are opened.

[0101] S30. When the pipeline temperature of the first heat exchanger reaches the target temperature first, it is determined that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger; the coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected; the coil of the second four-way valve of the control system is de-energized, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected; the first control valve of the control system is opened, the second control valve is closed, and the first throttling component and the second throttling component are opened.

[0102] In this embodiment, steps S29-S30 are described uniformly, and a target temperature for determining the defrosting priority is preset. When the pipe temperature of the second heat exchanger reaches the target temperature first, it is determined that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger, and the second heat exchanger is defrosted first. Fig. 9 FIG. 4 is a schematic diagram of a fourth air conditioning control flow path provided by an embodiment of the present invention. Fig. 9 Characterizes the flow path of continuous heating of the air conditioner and the need to defrost the second heat exchanger first. In this flow path, the coils of the 1st four-way valve, the 2nd four-way valve, and the 3rd four-way valve are energized, the D end is connected to the S end, and the C end is connected to the E end; the 2nd control valve is opened and the 1st control valve is closed. The 1st throttling component is opened and the 2nd throttling component is opened. The high-pressure and high-temperature refrigerant compressed by the compressor is divided into two paths. One path enters the gas pipe connecting pipe through the DS end of the 1st four-way valve, enters the indoor side for heating, and realizes the effect of continuous heating of the indoor unit in the defrosting state; the other path passes through the DS end of the 3rd four-way valve and the DS end of the 2nd four-way valve in turn, and enters the outdoor second heat exchanger for defrosting. The liquid refrigerant after condensation in the indoor side and the outdoor second heat exchanger converges at the liquid pipe connection pipe, enters the CE end of the third four-way valve through the first throttling component, and enters the outdoor first heat exchanger for evaporation. The evaporated low-pressure and low-temperature refrigerant enters the CE end of the first four-way valve through the second control valve and returns to the gas-liquid separator. The separated gaseous refrigerant enters the compressor for compression, and the cycle continues. Priority defrosting control of the second heat exchanger is achieved.

[0103] When the pipe temperature of the first heat exchanger reaches the target temperature first, it is determined that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger, and the first heat exchanger is defrosted first. Fig.10FIG. 1 is a schematic diagram of a fifth air conditioning control flow path provided by an embodiment of the present invention. Fig.10 Characterizes the flow path of continuous heating of the air conditioner and the need to defrost the first heat exchanger first. In this flow path, the first four-way valve and the third four-way valve coil are energized, and the D end is connected to the S end, and the C end is connected to the E end; the second four-way valve coil is de-energized, and the D end is connected to the C end, and the S end is connected to the E end. The second control valve is closed and the first control valve is opened. The first throttling component is opened and the second throttling component is opened. The high-pressure and high-temperature refrigerant compressed by the compressor is divided into two paths. One path enters the gas pipe connecting pipe through the DS end of the first four-way valve and enters the indoor side for heating, achieving the effect of continuous heating of the indoor unit in the defrosting state; the other path enters the outdoor first heat exchanger through the DS end of the third four-way valve, the DC end of the second four-way valve, and the first control valve in turn for defrosting. The defrosted liquid refrigerant then enters the liquid pipe connecting pipe through the CE end of the third four-way valve and the first throttling component, and merges with the liquid refrigerant from the indoor side. The combined refrigerant enters the outdoor second heat exchanger through the second throttling component for evaporation. The evaporated refrigerant enters the SE end of the second four-way valve and returns to the gas-liquid separator. The separated gaseous refrigerant enters the compressor for compression, and the cycle is repeated to achieve priority defrosting control of the first heat exchanger. In this way, the defrosting priority can be determined according to the pipeline temperature of the two heat exchangers to achieve defrosting control of different heat exchangers and improve defrosting efficiency.

[0104] In one possible implementation, the following is a severe frosting condition:

[0105] If Tc≤Te<Tb, this interval is the heavy frosting area of ​​the outdoor heat exchanger, and the rotation defrosting cannot be performed quickly. Therefore, when it is detected that the temperature of the defrost pipeline of any outdoor heat exchanger reaches the preset defrost threshold B, the conventional defrost flow path is used, that is, the two heat exchangers are defrosted at the same time. Figure 6 The flow control process is similar to S23. For details, please refer to Figure 1 Related to S23, that is, when the ambient temperature is less than the second threshold and greater than or equal to the third threshold, the control strategy is determined to be the first strategy. After defrosting is completed, the heating flow path is restored, and the cycle is repeated. During this period, the indoor fan stops running and the indoor unit stops heating.

[0106] In this embodiment Figure 6-Figure 10 The red line represents high-pressure and high-temperature refrigerant; the blue line represents medium-pressure and medium-temperature refrigerant; and the green line represents low-pressure and low-temperature refrigerant.

[0107] In a possible implementation, when the ambient temperature is within different threshold ranges within a preset time period, the duration that the ambient temperature is within each threshold range is obtained; and a control strategy is determined based on a ratio of each duration to the preset time period.

[0108] Specifically, if in the process of judging whether to enter defrosting, the interval of Te jumps between the above-mentioned different thresholds, the total length of time that Te is in the threshold interval is calculated in this process. When the time proportion of Te in the light frosting area is ≥ total time * □1, it is processed according to the defrosting flow path of the light frosting area; when the time proportion of Te in the light frosting area is < total time * □2, it is processed according to the defrosting flow path of the heavy frosting area; when the total time * □2 ≤ the time proportion of Te in the light frosting area is < total time * □1, if all the heavy frosting areas are located behind the light frosting areas, they are processed according to the defrosting flow path of the heavy frosting areas, otherwise they are processed according to the defrosting flow path of the light frosting areas. Among them, 100%> η1> η2> 50%. In this way, the current control strategy can be accurately determined according to the length of time that the ambient temperature is in different threshold ranges, avoiding the situation of repeated switching of control strategies, and realizing precise control of air conditioner defrosting.

[0109] The air conditioning control method provided in the embodiment of the present invention can realize the switching of different flow paths by controlling the four-way valve, the control valve and the throttling component. In the cooling mode, the outdoor heat exchanger can be connected in series and in parallel according to the operating load requirements, which is suitable for flow path switching in multi-load scenarios to achieve more efficient cooling. When running in the heating mode, different flow paths are used for defrosting according to the degree of frost. In the lightly frosted area, the outdoor heat exchanger is rotated for defrosting and the indoor continuous heating flow path is used; the heavy frosted area is conventionally defrosted. Ensure the efficient heating operation of the unit. Improve the overall working efficiency of the air conditioner and avoid the use of a single flow path.

[0110] Figure 4 A schematic diagram of the structure of an air conditioning control device provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the device specifically includes:

[0111] An acquisition module 41 is used to acquire the working mode and working parameters of the air conditioner;

[0112] A determination module 42, for determining a control strategy for a plurality of four-way valves, a plurality of control valves and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters;

[0113] The control module 43 is used to control the multiple four-way valves, the multiple control valves and the multiple throttling components according to the control strategy, so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrost control on the multiple heat exchangers through the control strategy.

[0114] In a possible implementation manner, the determination module is specifically used to determine the first control strategy when the load state is high load, and the first control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in parallel;

[0115] When the load state is low load, the second control strategy is determined, and the second control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in series.

[0116] In a possible implementation, the control module is specifically used to control the coil of the first four-way valve of the control system to be powered off, and the D end and the C end of the first four-way valve are connected, and the E end and the S end are connected;

[0117] The coils of the second four-way valve and the third four-way valve of the control system are both energized, and the D end and the S end of the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0118] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0119] In a possible implementation, the control module is specifically used to control the coils of the first four-way valve and the third four-way valve of the control system to be powered off, and the D end and the C end of the first four-way valve and the third four-way valve are connected, and the E end and the S end are connected;

[0120] The coil of the second four-way valve of the control system is energized, and the D end and the S end of the second four-way valve are connected, and the C end and the E end are connected;

[0121] The first control valve of the control system is closed, the second control valve is opened, the first throttle component is closed, and the second throttle component is opened.

[0122] In a possible implementation manner, the determination module is specifically configured to determine that the control strategy is a third strategy when the ambient temperature is greater than or equal to a first threshold, and the third strategy is configured to perform heating control on the air conditioner through the control system when the air conditioner is not frosted;

[0123] When the ambient temperature is less than a first threshold and greater than or equal to a second threshold, or the ambient temperature is less than a third threshold, the control strategy is determined to be a fourth strategy, and the fourth strategy is used to perform defrosting control on the plurality of heat exchangers of the control system according to a defrosting priority, the defrosting priority is negatively correlated with the pipe temperature of the heat exchanger, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold;

[0124] When the ambient temperature is less than the second threshold and greater than or equal to the third threshold, the control strategy is determined to be the first strategy.

[0125] In a possible implementation, the control module is specifically used to control the coils of the first four-way valve and the third four-way valve of the control system to be energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0126] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0127] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0128] In a possible implementation manner, the control module is specifically configured to determine that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger when the pipe temperature of the second heat exchanger reaches the target temperature first;

[0129] The coils of the first four-way valve, the second four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve, the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0130] Controlling the first control valve of the control system to close, the second control valve to open, and the first throttling component and the second throttling component to open;

[0131] or, when the pipe temperature of the first heat exchanger reaches the target temperature first, determining that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger;

[0132] The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0133] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0134] The first control valve of the control system is controlled to be open, the second control valve is closed, and the first throttle component and the second throttle component are opened.

[0135] In a possible implementation manner, the acquisition module is further configured to, when the ambient temperature is within different threshold ranges within a preset time period, acquire a duration during which the ambient temperature is within each threshold range;

[0136] The determination module is further used to determine the control strategy according to the ratio of each of the durations to the preset time period.

[0137] The air conditioning control device provided in this embodiment can be as follows Figure 4 The device shown in FIG. 1 may perform the following steps: Figure 2-3 All steps of the air conditioning control method in order to achieve Figure 2-3 For details, please refer to Figure 2-3 For the sake of brevity, the relevant description is not repeated here.

[0138] Figure 5 A schematic diagram of the structure of an air conditioning device provided by an embodiment of the present invention, Figure 5 The air conditioning device 500 shown includes: at least one processor 501, a memory 502, at least one network interface 504 and other user interfaces 503. The various components in the air conditioning device 500 are coupled together via a bus system 505. It is understood that the bus system 505 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 505 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system 505 is not shown in FIG. Figure 5 Various buses are labeled as bus system 505 .

[0139] The user interface 503 may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touch pad, or a touch screen).

[0140] It can be understood that the memory 502 in the embodiment of the present invention can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct RAM bus random access memory (DRRAM). The memory 502 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0141] In some implementations, the memory 502 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 5021 and an application program 5022 .

[0142] The operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 5022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present invention can be included in the application 5022.

[0143] In the embodiment of the present invention, by calling the program or instruction stored in the memory 502, specifically, the program or instruction stored in the application 5022, the processor 501 is used to execute the method steps provided by each method embodiment, for example, including:

[0144] Obtaining the working mode and working parameters of the air conditioner;

[0145] Determining a control strategy for a plurality of four-way valves, a plurality of control valves, and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters;

[0146] According to the control strategy, the multiple four-way valves, the multiple control valves and the multiple throttling components are controlled so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on the multiple heat exchangers through the control strategy.

[0147] In a possible implementation, when the load state is high load, the control strategy first strategy is determined, and the first strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in parallel;

[0148] When the load state is low load, the second control strategy is determined, and the second control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in series.

[0149] In a possible implementation manner, the coil of the first four-way valve of the control system is powered off, and the D end and the C end of the first four-way valve are connected, and the E end and the S end are connected;

[0150] The coils of the second four-way valve and the third four-way valve of the control system are both energized, and the D end and the S end of the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0151] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0152] In a possible implementation manner, the coils of the first four-way valve and the third four-way valve of the control system are powered off, and the D end and the C end of the first four-way valve and the third four-way valve are connected, and the E end and the S end are connected;

[0153] The coil of the second four-way valve of the control system is energized, and the D end and the S end of the second four-way valve are connected, and the C end and the E end are connected;

[0154] The first control valve of the control system is closed, the second control valve is opened, the first throttle component is closed, and the second throttle component is opened.

[0155] In a possible implementation, when the ambient temperature is greater than or equal to a first threshold, the control strategy is determined to be a third strategy, and the third strategy is used to perform heating control on the air conditioner through the control system when the air conditioner is not frosted;

[0156] When the ambient temperature is less than a first threshold and greater than or equal to a second threshold, or the ambient temperature is less than a third threshold, the control strategy is determined to be a fourth strategy, and the fourth strategy is used to perform defrosting control on the plurality of heat exchangers of the control system according to a defrosting priority, the defrosting priority is negatively correlated with the pipe temperature of the heat exchanger, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold;

[0157] When the ambient temperature is less than the second threshold and greater than or equal to the third threshold, the control strategy is determined to be the first strategy.

[0158] In a possible implementation manner, the coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0159] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0160] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0161] In a possible implementation, when the pipe temperature of the second heat exchanger reaches the target temperature first, it is determined that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger;

[0162] The coils of the first four-way valve, the second four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve, the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0163] Controlling the first control valve of the control system to close, the second control valve to open, and the first throttling component and the second throttling component to open;

[0164] or, when the pipe temperature of the first heat exchanger reaches the target temperature first, determining that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger;

[0165] The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0166] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0167] The first control valve of the control system is controlled to be open, the second control valve is closed, and the first throttle component and the second throttle component are opened.

[0168] In a possible implementation, when the ambient temperature is within different threshold ranges within a preset time period, the duration for which the ambient temperature is within each threshold range is acquired;

[0169] The control strategy is determined according to the ratio of each of the durations to the preset time period.

[0170] The method disclosed in the above embodiment of the present invention can be applied to the processor 501, or implemented by the processor 501. The processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 501 or the instruction in the form of software. The above processor 501 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor to execute, or the hardware and software units in the decoding processor can be executed. The software unit can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and completes the steps of the above method in combination with its hardware.

[0171] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0172] For software implementation, the technology described herein can be implemented by a unit that performs the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0173] The air conditioning device provided in this embodiment can be Figure 5 The air conditioning equipment shown in FIG. Figure 2-3 All steps of the air conditioning control method in order to achieve Figure 2-3 For details, please refer to Figure 2-3 For the sake of brevity, the relevant description is not repeated here.

[0174] The embodiment of the present invention also provides a storage medium (computer-readable storage medium). The storage medium here stores one or more programs. The storage medium may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include a combination of the above-mentioned types of memory.

[0175] When one or more programs in the storage medium can be executed by one or more processors, the automatic pattern making method executed on the device side can be implemented.

[0176] The processor is used to execute the air conditioning control program stored in the memory to implement the following steps of the air conditioning control method executed on the device side:

[0177] Obtaining the working mode and working parameters of the air conditioner;

[0178] Determining a control strategy for a plurality of four-way valves, a plurality of control valves, and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters;

[0179] According to the control strategy, the multiple four-way valves, the multiple control valves and the multiple throttling components are controlled so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on the multiple heat exchangers through the control strategy.

[0180] In a possible implementation, when the load state is high load, the control strategy first strategy is determined, and the first strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in parallel;

[0181] When the load state is low load, the second control strategy is determined, and the second control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in series.

[0182] In a possible implementation manner, the coil of the first four-way valve of the control system is powered off, and the D end and the C end of the first four-way valve are connected, and the E end and the S end are connected;

[0183] The coils of the second four-way valve and the third four-way valve of the control system are both energized, and the D end and the S end of the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0184] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0185] In a possible implementation manner, the coils of the first four-way valve and the third four-way valve of the control system are powered off, and the D end and the C end of the first four-way valve and the third four-way valve are connected, and the E end and the S end are connected;

[0186] The coil of the second four-way valve of the control system is energized, and the D end and the S end of the second four-way valve are connected, and the C end and the E end are connected;

[0187] The first control valve of the control system is closed, the second control valve is opened, the first throttle component is closed, and the second throttle component is opened.

[0188] In a possible implementation, when the ambient temperature is greater than or equal to a first threshold, the control strategy is determined to be a third strategy, and the third strategy is used to perform heating control on the air conditioner through the control system when the air conditioner is not frosted;

[0189] When the ambient temperature is less than a first threshold and greater than or equal to a second threshold, or the ambient temperature is less than a third threshold, the control strategy is determined to be a fourth strategy, and the fourth strategy is used to perform defrosting control on the plurality of heat exchangers of the control system according to a defrosting priority, the defrosting priority is negatively correlated with the pipe temperature of the heat exchanger, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold;

[0190] When the ambient temperature is less than the second threshold and greater than or equal to the third threshold, the control strategy is determined to be the first strategy.

[0191] In a possible implementation manner, the coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0192] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0193] The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

[0194] In a possible implementation, when the pipe temperature of the second heat exchanger reaches the target temperature first, it is determined that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger;

[0195] The coils of the first four-way valve, the second four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve, the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0196] Controlling the first control valve of the control system to close, the second control valve to open, and the first throttling component and the second throttling component to open;

[0197] or, when the pipe temperature of the first heat exchanger reaches the target temperature first, determining that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger;

[0198] The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected;

[0199] The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected;

[0200] The first control valve of the control system is controlled to be open, the second control valve is closed, and the first throttle component and the second throttle component are opened.

[0201] In a possible implementation, when the ambient temperature is within different threshold ranges within a preset time period, the duration for which the ambient temperature is within each threshold range is acquired;

[0202] The control strategy is determined according to the ratio of each of the durations to the preset time period.

[0203] The professionals should further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0204] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0205] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air conditioning control method, characterized in that: include: Obtaining the working mode and working parameters of the air conditioner; Determining a control strategy for a plurality of four-way valves, a plurality of control valves, and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters; According to the control strategy, the multiple four-way valves, the multiple control valves and the multiple throttling components are controlled so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrosting control on the multiple heat exchangers through the control strategy.

2. The method according to claim 1, characterized in that: When the working mode is a cooling mode and the working parameter is a load state of the air conditioner, determining a control strategy for a plurality of four-way valves, a plurality of control valves and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameter includes: When the load state is high load, determining the first control strategy, wherein the first control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in parallel; When the load state is low load, the second control strategy is determined, and the second control strategy is used to control the first heat exchanger and the second heat exchanger in the control system to be connected in series.

3. The method according to claim 2, characterized in that When the control strategy is the first strategy, controlling the plurality of four-way valves, the plurality of control valves and the plurality of throttling components according to the control strategy includes: The coil of the first four-way valve of the control system is powered off, and the D end and the C end of the first four-way valve are connected, and the E end and the S end are connected; The coils of the second four-way valve and the third four-way valve of the control system are both energized, and the D end and the S end of the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected; The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

4. The method according to claim 2, characterized in that: When the control strategy is the second strategy, controlling the plurality of four-way valves, the plurality of control valves and the plurality of throttling components according to the control strategy includes: The coils of the first four-way valve and the third four-way valve of the control system are powered off, and the D end and the C end of the first four-way valve and the third four-way valve are connected, and the E end and the S end are connected; The coil of the second four-way valve of the control system is energized, and the D end and the S end of the second four-way valve are connected, and the C end and the E end are connected; The first control valve of the control system is closed, the second control valve is opened, the first throttle component is closed, and the second throttle component is opened.

5. The method according to claim 2, characterized in that: When the working mode is a heating mode and the working parameter is the ambient temperature of the outdoor environment where the air conditioner is currently located, the control strategy for multiple four-way valves, multiple control valves and multiple throttling components in the control system of the air conditioner is determined according to the working mode and the working parameter, including: When the ambient temperature is greater than or equal to a first threshold, determining that the control strategy is a third strategy, wherein the third strategy is used to perform heating control on the air conditioner through the control system when the air conditioner is not frosted; When the ambient temperature is less than a first threshold and greater than or equal to a second threshold, or the ambient temperature is less than a third threshold, the control strategy is determined to be a fourth strategy, and the fourth strategy is used to perform defrosting control on the plurality of heat exchangers of the control system according to a defrosting priority, the defrosting priority is negatively correlated with the pipe temperature of the heat exchanger, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold; When the ambient temperature is less than the second threshold and greater than or equal to the third threshold, the control strategy is determined to be the first strategy.

6. The method according to claim 5, characterized in that When the control strategy is the third strategy, controlling the plurality of four-way valves, the plurality of control valves and the plurality of throttling components according to the control strategy includes: The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected; The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected; The first control valve controlling the control system is closed, the second control valve is opened, and the first throttle component and the second throttle component are opened.

7. The method according to claim 5, characterized in that When the control strategy is the fourth strategy, controlling the plurality of four-way valves, the plurality of control valves and the plurality of throttling components according to the control strategy includes: When the pipe temperature of the second heat exchanger reaches the target temperature first, determining that the defrosting priority of the second heat exchanger is higher than that of the first heat exchanger; The coils of the first four-way valve, the second four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve, the second four-way valve and the third four-way valve are connected, and the C end and the E end are connected; Controlling the first control valve of the control system to close, the second control valve to open, and the first throttling component and the second throttling component to open; or, when the pipe temperature of the first heat exchanger reaches the target temperature first, determining that the defrosting priority of the first heat exchanger is higher than that of the second heat exchanger; The coils of the first four-way valve and the third four-way valve of the control system are energized, and the D end and the S end of the first four-way valve and the third four-way valve are connected, and the C end and the E end are connected; The coil of the second four-way valve of the control system is powered off, and the D end and the C end of the second four-way valve are connected, and the S end and the E end are connected; The first control valve of the control system is controlled to be open, the second control valve is closed, and the first throttle component and the second throttle component are opened.

8. The method according to claim 5, characterized in that The method further comprises: When the ambient temperature is within different threshold ranges within a preset time period, obtaining the duration that the ambient temperature is within each threshold range; The control strategy is determined according to the ratio of each of the durations to the preset time period.

9. An air conditioning control device, characterized in that: include: An acquisition module, used to acquire the working mode and working parameters of the air conditioner; A determination module, for determining a control strategy for a plurality of four-way valves, a plurality of control valves and a plurality of throttling components in a control system of the air conditioner according to the working mode and the working parameters; A control module is used to control the multiple four-way valves, the multiple control valves and the multiple throttling components according to the control strategy, so as to switch the connection status of the multiple heat exchangers in the control system through the control strategy, or to perform defrost control on the multiple heat exchangers through the control strategy.

10. An air conditioning control system, characterized in that: Used to implement the air conditioning control method according to claim 1, the system comprises: a gas-liquid separator, a compressor, three four-way valves, two throttling components, two outdoor heat exchangers, two control valves, a liquid pipe connecting pipe and a gas pipe connecting pipe, the four-way valve, the throttling component and the control valve are used to receive a control signal, and the control signal is used to control the four-way valve, the throttling component and the control valve according to a control strategy; The outlet pipe end of the gas-liquid separator is connected to the suction side pipeline of the compressor, and the inlet pipe end is connected to the E end of the first four-way valve and the E end of the second four-way valve; The compressor exhaust side pipeline is connected to the D end of the first four-way valve and the D end of the third four-way valve respectively; The S end of the third four-way valve is connected to the D end of the second four-way valve, the E end is connected to the liquid collecting end of the first heat exchanger, and the C end is connected to the liquid pipe connecting pipe through the first throttling component; The S end of the first four-way valve is connected to the gas pipe connecting pipe, and the C end is connected to the gas collecting end of the first heat exchanger through the second control valve; The S end of the second four-way valve is connected to the gas collecting end of the second heat exchanger, and the C end is connected to the gas collecting end of the first heat exchanger through the first control valve; The liquid collecting end of the second heat exchanger is connected to the liquid pipe connecting pipe through a second throttling component.

11. An air conditioning device, characterized in that: include: A processor and a memory, wherein the processor is used to execute an air conditioning control program stored in the memory to implement the air conditioning control method according to any one of claims 1 to 8.

12. A storage medium, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the air conditioning control method according to any one of claims 1 to 8.

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