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

Abstract

The present invention relates to the technical field of air conditioners, and discloses an air conditioner control method, device, air conditioner and storage medium. After the air conditioner is turned on and operated for a period of time, the gas phase side valve is controlled to open, so that the air conditioner is switched to a phase separation refrigeration mode. In the phase separation refrigeration mode, a gaseous low-temperature refrigerant can be separated by a gas-liquid separation device, and the gaseous low-temperature refrigerant is controlled to reach a heat exchanger. The refrigerant at the condenser outlet is heat-exchanged again by the gaseous low-temperature refrigerant and the heat exchanger, thereby increasing the supercooling of the refrigerant at the condenser outlet to increase the cooling capacity of the air conditioner. Compared with the existing method of increasing the evaporator and condenser, the solution of the present invention adopts phase separation technology, which can not only improve the cooling capacity, but also does not require too much increase in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner control method and device, an air conditioner, and a storage medium. Background Art

[0002] The existing large-capacity, high-efficiency air conditioners can only improve their cooling capacity by increasing the size of the evaporator and condenser. However, increasing the size of the evaporator and condenser has the problem of high cost.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present invention is to provide an air conditioner control method, device, air conditioner and storage medium, aiming to solve the technical problem of high cost in improving the refrigeration capacity of air conditioners in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides a method for controlling an air conditioner, wherein the air conditioner includes a compressor, a condenser, and a heat exchanger connected in sequence, and further includes a gas-liquid separation device, wherein the outlet of the heat exchanger is connected to the inlet of the gas-liquid separation device, the gas phase outlet of the gas-liquid separation device is connected to another inlet of the heat exchanger, and a gas phase side valve is provided between the gas phase outlet of the gas-liquid separation device and the other inlet of the heat exchanger;

[0006] The air conditioner control method comprises the following steps:

[0007] When the air conditioner is turned on for a first preset time, the gas phase side valve is opened to enter the phase separation refrigeration mode;

[0008] Controlling the gaseous low-temperature refrigerant separated by the gas-liquid separation device to pass through the gas phase side valve to reach the heat exchanger;

[0009] The gaseous low-temperature refrigerant is controlled to exchange heat with the refrigerant at the condenser outlet through the heat exchanger to increase the supercooling degree of the refrigerant at the condenser outlet.

[0010] Optionally, the air conditioner further includes an evaporator and a first pressure detection device, the liquid phase outlet of the gas-liquid separation device is connected to the evaporator, the evaporator is connected to the compressor, and the first pressure detection device is provided on the pipeline between the evaporator and the compressor;

[0011] When the air conditioner is turned on for the first preset time, before the gas phase side valve is opened, the method further includes:

[0012] During the second preset time after the air conditioner is turned on, the gas phase side valve is controlled to be closed and the air conditioner operates in a normal cooling mode;

[0013] determining a target time period according to the second preset time and the first preset time, and obtaining an average pressure corresponding to the first pressure detection device within the target time period;

[0014] determining an initial opening according to the average pressure;

[0015] Correspondingly, when the air conditioner is turned on for the first preset time, the gas phase side valve is opened, including:

[0016] When the air conditioner is turned on for a first preset time, the gas phase side valve is opened according to the initial opening degree.

[0017] Optionally, the air conditioner further comprises a second pressure detection device, which is provided on the pipeline between the gas phase outlet of the gas-liquid separation device and the gas phase side valve;

[0018] After controlling the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger, the method further includes:

[0019] Obtaining a first current pressure corresponding to the first pressure detection device and a second current pressure corresponding to the second pressure detection device;

[0020] calculating a current pressure difference according to the first current pressure and the second current pressure;

[0021] Determining whether the current pressure difference is less than a preset pressure value;

[0022] If the current pressure difference is not less than a preset pressure value, comparing the first current pressure with the second current pressure;

[0023] Determine the target opening according to the comparison result and the current opening;

[0024] The opening of the gas phase side valve is adjusted according to the target opening.

[0025] Optionally, determining the target opening according to the comparison result and the current opening includes:

[0026] If the comparison result shows that the first current pressure is less than the second current pressure, determining the target opening according to the first preset constant and the current opening;

[0027] If the comparison result shows that the first current pressure is greater than or equal to the second current pressure, the target opening is determined according to the second preset constant and the current opening.

[0028] Optionally, after adjusting the opening of the gas phase side valve according to the target opening, the method further includes:

[0029] After the gas phase side valve maintains the target opening for a third preset time, the process returns to the step of obtaining the first current pressure corresponding to the first pressure detection device and the second current pressure corresponding to the second pressure detection device.

[0030] Optionally, after determining whether the current pressure difference is less than a preset pressure value, the method further includes:

[0031] If the current pressure difference is less than the preset pressure value, the current opening of the gas phase side valve is kept unchanged;

[0032] After the gas phase side valve maintains the current opening for a fourth preset time, the process returns to the step of obtaining the first current pressure corresponding to the first pressure detection device and the second current pressure corresponding to the second pressure detection device.

[0033] Optionally, after controlling the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger, the method further includes:

[0034] Controlling the gaseous refrigerant after passing through the heat exchanger to merge with the refrigerant at the evaporator outlet to obtain a merged refrigerant;

[0035] The refrigerant after control and confluence returns to the compressor through the return pipe.

[0036] In addition, to achieve the above-mentioned object, the present invention further provides an air conditioner control device, the air conditioner control device comprising:

[0037] The phase separation refrigeration module is used to open the gas phase side valve when the air conditioner is turned on for a first preset time to enter the phase separation refrigeration mode;

[0038] A refrigerant control module, used to control the gaseous low-temperature refrigerant separated by the gas-liquid separation device to reach the heat exchanger through the gas phase side valve;

[0039] The refrigeration enhancement module is used to control the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger to improve the supercooling degree of the refrigerant at the condenser outlet.

[0040] In addition, to achieve the above-mentioned purpose, the present invention also proposes an air conditioner, which includes a compressor, a condenser and a heat exchanger connected in sequence, and the air conditioner also includes a gas-liquid separation device, the outlet of the heat exchanger is connected to the inlet of the gas-liquid separation device, the gas phase outlet of the gas-liquid separation device is connected to the other inlet of the heat exchanger, and a gas phase side valve is arranged between the gas phase outlet of the gas-liquid separation device and the other inlet of the heat exchanger; the air conditioner also includes: a memory, a processor and an air conditioner control program stored on the memory and runnable on the processor, and when the air conditioner control program is executed by the processor, the air conditioner control method as described above is implemented.

[0041] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the air conditioner control method described above is implemented.

[0042] In the air conditioner control method proposed in the present invention, after the air conditioner is turned on and runs for a period of time, the gas phase side valve is controlled to open, so that the air conditioner is switched to the phase separation refrigeration mode. In the phase separation refrigeration mode, the gaseous low-temperature refrigerant can be separated by the gas-liquid separation equipment, and the gaseous low-temperature refrigerant is controlled to reach the heat exchanger. The refrigerant at the condenser outlet is heat-exchanged again through the gaseous low-temperature refrigerant and the heat exchanger, thereby increasing the supercooling of the refrigerant at the condenser outlet to increase the cooling capacity of the air conditioner. Compared with the existing method of increasing the evaporator and condenser, this scheme adopts phase separation technology, which can not only improve the refrigeration capacity, but also does not require too much increase in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic diagram of the structure of an air conditioner in the hardware operating environment involved in the embodiment of the present invention;

[0044] Figure 2 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention;

[0045] Figure 3 A schematic diagram of an air conditioning system according to a first embodiment of an air conditioner control method of the present invention;

[0046] Figure 4 1. It is a flow chart of a second embodiment of the air conditioner control method of the present invention;

[0047] Figure 5 1. It is a flow chart of a third embodiment of the air conditioner control method of the present invention;

[0048] Figure 6 This is a schematic diagram of the overall process control of the first embodiment of the air conditioner control method of the present invention;

[0049] Figure 7 FIG. 1 is a functional module diagram of a first embodiment of an air conditioner control device according to the present invention.

[0050] Description of Figure Numbers:

[0051] Label name Label name 1 compressor 2 Condenser 3 heat exchanger 4 Gas phase side valve 5 Refrigeration valves 6 Gas-liquid separation equipment 7 evaporator 8 Second pressure detection device 9 First pressure detection device

[0052] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] Reference Figure 1 , Figure 1 This is a schematic diagram of the air conditioner structure of the hardware operating environment involved in the embodiment of the present invention.

[0055] like Figure 1 As shown, the air conditioner may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a button, and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) or a stable memory (non-volatile memory), such as a disk storage. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0056] Those skilled in the art will understand that Figure 1 The equipment structure shown in the figure does not constitute a limitation on the air conditioner, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0057] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module and an air conditioner control program.

[0058] exist Figure 1 In the air conditioner shown, the network interface 1004 is mainly used to connect to the external network and communicate data with other network devices; the user interface 1003 is mainly used to connect to the user device and communicate data with the user device; the device of the present invention calls the air conditioner control program stored in the memory 1005 through the processor 1001, and executes the air conditioner control method provided by the embodiment of the present invention.

[0059] Based on the above hardware structure, an embodiment of the air conditioner control method of the present invention is proposed.

[0060] Reference Figure 2 , Figure 2 FIG. 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention.

[0061] In a first embodiment, the air conditioner includes a compressor, a condenser, and a heat exchanger connected in sequence, and further includes a gas-liquid separation device, wherein the outlet of the heat exchanger is connected to the inlet of the gas-liquid separation device, the gas phase outlet of the gas-liquid separation device is connected to another inlet of the heat exchanger, and a gas phase side valve is provided between the gas phase outlet of the gas-liquid separation device and the other inlet of the heat exchanger;

[0062] The air conditioner control method comprises the following steps:

[0063] Step S10 , when the air conditioner is turned on for a first preset time, the gas phase side valve is opened to enter a phase separation cooling mode.

[0064] It should be noted that the execution subject of this embodiment may be an air conditioner, such as a cabinet air conditioner, a wall-mounted air conditioner, a central air conditioner, or other types of air conditioners, and this embodiment does not limit this.

[0065] It should be noted that the gas-liquid separation device in this embodiment may be a gas-liquid separator, or any device that can achieve the same or similar functions, and this embodiment is not limited thereto. The heat exchanger in this embodiment may be a plate heat exchanger, or any device that can achieve the same or similar functions, and this embodiment is not limited thereto. The gas-phase side valve in this embodiment may be a solenoid valve, or any device that can achieve the same or similar functions, and this embodiment is not limited thereto.

[0066] It should be understood that Figure 3 As shown, Figure 3 Schematic diagram of an air conditioning system. The air conditioner in this embodiment may include a compressor 1, a condenser 2, and a heat exchanger 3. The outlet of the compressor 1 may be connected to the inlet of the condenser 2, which in turn may be connected to the inlet of the heat exchanger 3. The outlet of the heat exchanger 3 may be connected to the inlet of the gas-liquid separation device 6. Furthermore, a refrigeration valve 5 may be provided between the outlet of the heat exchanger 3 and the gas-liquid separation device 6.

[0067] It is understood that since the gas-liquid separation device can separate the refrigerant into gas and liquid, the gas-liquid separation device 6 is provided with one inlet and two outlets, the other outlets being a gas phase outlet and a liquid phase outlet. The gaseous refrigerant separated by the gas-liquid separation device 6 can flow out from the gas phase outlet, and the liquid refrigerant separated by the gas-liquid separation device 6 can flow out from the liquid phase outlet.

[0068] It is understood that the gas phase outlet of the gas-liquid separation device 6 can be connected to the other inlet of the heat exchanger 3, and the other outlet of the heat exchanger 3 can be connected to the inlet of the compressor. A gas phase side valve 4 can also be provided between the gas phase outlet of the gas-liquid separation device 6 and the other inlet of the heat exchanger 3. Specifically, the liquid phase outlet of the gas-liquid separation device 6 can be connected to the inlet of the evaporator 7, and the outlet of the evaporator 7 can be connected to the inlet of the compressor.

[0069] It is understood that the cooling mode of the air conditioner in this embodiment may include a normal cooling mode and a phase separation cooling mode. When the air conditioner is operating in the normal cooling mode, the cooling valve 5 can be controlled to open and the gas phase side valve 4 can be closed, and normal cooling operation is performed at this time. When the air conditioner is operating in the phase separation cooling mode, the cooling valve 5 can be controlled to open and the gas phase side valve 4 can also be opened. At this time, the gaseous low-temperature refrigerant separated by the gas-liquid separation device 6 and the heat exchanger 3 are used to re-exchange heat with the refrigerant at the condenser outlet after heat exchange in the condenser, thereby increasing the subcooling degree of the refrigerant to achieve a better cooling effect.

[0070] It should be noted that the second preset time and parameter n can be preset. For example, the second preset time can be set to 3 minutes, or other values. This embodiment does not limit this. In this embodiment, 3 minutes is used as an example for description. The first preset time can be calculated based on the second preset time and parameter n. For example, when the second preset time is 3 minutes, the first preset time can be calculated as 3+n minutes. This embodiment does not limit the specific value of parameter n.

[0071] It can be understood that when the air conditioner is just turned on for cooling, the air conditioner is controlled to enter the normal cooling mode. When the air conditioner is turned on for the first preset time, that is, when the air conditioner is turned on for cooling for 3+n min, the gas phase side valve is controlled to open to switch the normal cooling mode to the phase separation cooling mode.

[0072] Step S20: Control the gaseous low-temperature refrigerant separated by the gas-liquid separation device to reach the heat exchanger through the gas-phase side valve.

[0073] It should be understood that in the phase separation refrigeration mode, the gas-liquid separation equipment can be controlled to perform gas-liquid separation on the refrigerant to obtain the separated gaseous low-temperature refrigerant, and then the separated gaseous low-temperature refrigerant is controlled to flow out from the gas phase outlet corresponding to the gas-liquid separation equipment, and is conducted to the heat exchanger through the gas phase side valve 4 and flows into the other inlet of the heat exchanger.

[0074] Step S30: Control the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger to increase the supercooling degree of the refrigerant at the condenser outlet.

[0075] It can be understood that the refrigerant discharged from the compressor is converted into condenser outlet refrigerant after heat exchange in the condenser. The condenser outlet refrigerant flows into the inlet of the heat exchanger, and the gaseous low-temperature refrigerant separated by the gas-liquid separation equipment flows into the other inlet of the heat exchanger. Therefore, the condenser outlet refrigerant after heat exchange in the condenser can be heat-exchanged again by the gaseous low-temperature refrigerant in the heat exchanger, thereby improving the supercooling of the condenser outlet refrigerant and obtaining the condenser outlet refrigerant with improved supercooling. By exchanging heat with the indoor return air through the evaporator through the condenser outlet refrigerant with improved supercooling, a better cooling effect can be achieved.

[0076] It can be understood that this solution does not require the enlargement of the condenser and evaporator, and does not increase the cost too much. This solution adopts phase separation technology, which can greatly improve the energy efficiency of the air conditioner. The gaseous refrigerant separated by the gas-liquid separation equipment is used in the heat exchanger to increase the refrigerant supercooling, which can further improve the refrigeration capacity.

[0077] It should be understood that Figure 3 As shown, after the gaseous low-temperature refrigerant is controlled to enter the heat exchanger for heat exchange, the gaseous refrigerant after heat exchange through the heat exchanger and the evaporator outlet refrigerant after heat exchange through the evaporator are merged, and the refrigerant after the gaseous refrigerant and the evaporator outlet refrigerant are transmitted to the return air pipe and enter the compressor through the return air pipe.

[0078] In this embodiment, after the air conditioner is turned on and runs for a period of time, the gas phase side valve is controlled to open, so that the air conditioner is switched to the phase separation refrigeration mode. In the phase separation refrigeration mode, the gaseous low-temperature refrigerant can be separated by the gas-liquid separation equipment, and the gaseous low-temperature refrigerant is controlled to reach the heat exchanger. The refrigerant at the condenser outlet is heat-exchanged again through the gaseous low-temperature refrigerant and the heat exchanger, thereby increasing the supercooling of the refrigerant at the condenser outlet to increase the cooling capacity of the air conditioner. Compared with the existing method of increasing the evaporator and condenser, this solution adopts phase separation technology, which can not only improve the refrigeration capacity, but also does not require too much increase in cost.

[0079] In one embodiment, if Figure 4 As shown, a second embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment, wherein the air conditioner further includes an evaporator and a first pressure detection device, the liquid phase outlet of the gas-liquid separation device is connected to the evaporator, the evaporator is connected to the compressor, and the first pressure detection device is provided on the pipeline between the evaporator and the compressor;

[0080] Before step S10, the method further includes:

[0081] Step S01: During the second preset time after the air conditioner is turned on, the gas phase side valve is controlled to be closed, and the air conditioner operates in a normal cooling mode.

[0082] It should be noted that Figure 3 As shown, the air conditioner in this embodiment may further include an evaporator 7 and a first pressure detection device 9 .

[0083] The liquid phase outlet of the gas-liquid separation device 6 can be connected to the inlet of the evaporator 7, and the outlet of the evaporator 7 can be connected to the inlet of the compressor. The first pressure detection device 9 can be arranged on the pipeline between the evaporator 7 and the compressor 1. This embodiment does not limit the specific location of the first pressure detection device 9. It can be arranged on the pipeline between the evaporator 7 and the compressor 1. This embodiment does not limit this.

[0084] It should be understood that the gas-phase side valve can be closed within the second preset time when the air conditioner is in the cooling mode. For example, if the second preset time is 3 minutes, the gas-phase side valve can be locked within 3 minutes of the air conditioner being in the cooling mode. When the gas-phase side valve is closed, the gaseous low-temperature refrigerant separated by the gas-liquid separation device cannot increase the subcooling degree of the refrigerant at the condenser outlet, and the air conditioner is controlled to operate in normal cooling mode and perform normal cooling operations.

[0085] Step S02: determining a target time period according to the second preset time and the first preset time, and obtaining an average pressure corresponding to the first pressure detection device within the target time period.

[0086] It should be noted that a target time period can be calculated based on the second preset time and the first preset time. During the target time period, pressure detection is performed by the first pressure detection device to obtain pressure parameters, and then the average pressure is calculated based on the pressure parameters and the target time period. The target time period can be the time between the end time of the second preset time and the start time of the first preset time.

[0087] In a specific implementation, for example, when the second preset time is 3 minutes and the first preset time is 3+n minutes, the target time period can be determined to be from the 3rd minute to the 3rd+nth minute. During this period, the return air pressure can be detected by the first pressure detection device to obtain pressure parameters, and then the average pressure can be calculated. For example, when the parameter n is 1, the second preset time is 3 minutes, and the first preset time is 4 minutes, the target time period can be determined to be from the 3rd minute to the 4th minute. During this period, the return air pressure can be detected by the first pressure detection device to obtain pressure parameters, and then the average pressure P_ave_valve9 can be calculated.

[0088] Step S03: determining an initial opening degree according to the average pressure.

[0089] It should be understood that after the average pressure is determined, the initial opening of the gas phase side valve can be determined based on the average pressure. Specifically, the initial opening can be determined based on the average pressure using the following formula:

[0090] LR4_0=LR_min+(LR_max-LR_min) / (P_ave_valve9-P_min)*(P_max-P_min);

[0091] Wherein, LR4_0 is the initial opening, P_ave_valve9 is the average pressure, P_max is the maximum pressure, P_min is the minimum pressure, LR_max is the maximum opening, and LR_min is the minimum opening. P_max, P_min, LR_max, and LR_min are all preset parameters. The air conditioner can be pre-tested for operating conditions and the values ​​of these parameters can be determined based on the test results. Other methods can also be used to determine the values ​​of these parameters based on actual conditions, and this embodiment does not impose any limitations on this.

[0092] Accordingly, the step S10 includes:

[0093] Step S101 , when the air conditioner is turned on for a first preset time, the gas phase side valve is opened according to the initial opening degree.

[0094] It is understandable that after determining the initial opening, when the air conditioner's cooling operation time reaches a first preset time, the gas phase side valve can be opened according to the calculated initial opening to adjust the opening of the gas phase side valve to the initial opening.

[0095] In this embodiment, when the air conditioner is just turned on for cooling, the gas phase side valve is closed and operates in normal cooling mode. Between the end of the second preset time and the start of the first preset time, the average pressure of the return air is detected by the first pressure detection device, and the initial opening of the gas phase side valve is calculated based on the average pressure. When the cooling start-up time of the air conditioner reaches the first preset time, the gas phase side valve is opened according to the initial opening control to switch the air conditioner to the phase separation cooling mode. The initial opening of the gas phase side valve is determined by the average pressure, so that precise control can be achieved.

[0096] In one embodiment, if Figure 5 As shown, a third embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment or the second embodiment. In this embodiment, the description is based on the first embodiment. The air conditioner further includes a second pressure detection device, which is provided on the pipeline between the gas phase outlet of the gas-liquid separation device and the gas phase side valve;

[0097] After step S30, the method further includes:

[0098] Step S401: Acquire a first current pressure corresponding to the first pressure detection device and a second current pressure corresponding to the second pressure detection device.

[0099] It should be noted that Figure 3 As shown, the air conditioner in this embodiment may further include a second pressure detection device 8.

[0100] Among them, the second pressure detection device 8 can be set on the pipeline between the gas phase outlet of the gas-liquid separation equipment 6 and the gas phase side valve 4. This embodiment does not limit the specific position of the second pressure detection device 8, as long as it is set on the pipeline between the gas phase outlet of the gas-liquid separation equipment 6 and the gas phase side valve 4.

[0101] For example, the second pressure detection device 8 can be set in the middle position of the pipeline between the gas phase outlet of the gas-liquid separation equipment 6 and the gas phase side valve 4; the second pressure detection device 8 can also be set on the pipeline between the gas phase outlet of the gas-liquid separation equipment 6 and the gas phase side valve 4, close to the gas-liquid separation equipment 6; the second pressure detection device 8 can also be set on the pipeline between the gas phase outlet of the gas-liquid separation equipment 6 and the gas phase side valve 4, close to the gas phase side valve 4. This embodiment does not impose any restrictions on this.

[0102] It should be noted that the first pressure detection device and the second pressure detection device can be pressure detection devices of the same model or different models, as long as they can realize pressure detection. This embodiment does not impose any restrictions on this.

[0103] It should be understood that after the air conditioner is controlled to switch to the phase separation cooling mode, pressure detection can be performed by the first pressure detection device and the second pressure detection device respectively to obtain the first pressure parameter and the second pressure parameter.

[0104] It is understood that the first current pressure can be determined based on the first pressure parameter of the first pressure detection device, and the second current pressure can be determined based on the second pressure parameter of the second pressure detection device. The first current pressure can be represented by P_9, and the second current pressure can be represented by P_8.

[0105] It can be understood that the first pressure detection device detects the pressure on the return air side, and the second pressure detection device detects the pressure on the gas side of the gas-liquid separation equipment, that is, the first current pressure is the current pressure on the return air side, and the second current pressure is the current pressure on the gas side of the gas-liquid separation equipment.

[0106] Step S402: Calculate a current pressure difference according to the first current pressure and the second current pressure.

[0107] It is understandable that after obtaining the first current pressure and the second current pressure, the current pressure difference can be determined based on the first current pressure and the second current pressure. Specifically, the current pressure difference can be obtained by subtracting the second current pressure difference from the first current pressure difference.

[0108] It is understandable that the current pressure difference can be calculated according to the first current pressure and the second current pressure using the following formula:

[0109] ΔP=P_8-P_9;

[0110] Wherein, ΔP is the current pressure difference, P_8 is the second current pressure, and P_9 is the first current pressure.

[0111] Step S403: determine whether the current pressure difference is less than a preset pressure value.

[0112] It should be noted that the preset pressure value P0 can be set in advance and can be set according to actual conditions. This embodiment does not limit the specific value of the preset pressure value P0.

[0113] It should be understood that after determining the current pressure difference ΔP, the current pressure difference ΔP may be compared with a preset pressure value P0 to determine whether the current pressure difference ΔP is less than the preset pressure value P0.

[0114] Step S404: If the current pressure difference is not less than a preset pressure value, the first current pressure is compared with the second current pressure.

[0115] It should be understood that if the current pressure difference ΔP is not less than the preset pressure value P0, that is, ΔP≥P0, the pressures of P_8 and P_9 can be compared, that is, the first current pressure P_9 and the second current pressure P_8 are compared to obtain a comparison result.

[0116] Step S405: determining the target opening according to the comparison result and the current opening.

[0117] It should be understood that the target opening can be determined by different strategies according to different comparison results, and the gas phase side valve 4 can be adjusted according to the target opening to reduce the pressure difference between the return gas side pressure and the gas side pressure of the gas-liquid separation equipment.

[0118] It should be noted that the first preset constant and the second preset constant can be preset. For example, the first preset constant can be set to 0.95 and the second preset constant can be set to 1.05. They can also be set to other values ​​according to actual conditions, which is not limited in this embodiment.

[0119] It can be understood that if the comparison result is that the first current pressure P_9 is less than the second current pressure P_8, that is, P_9<P_8, it means that the opening of the gas phase side valve 4 needs to be reduced. The current opening of the gas phase side valve 4 can be obtained, and then the target opening is calculated based on the first preset constant and the current opening of the gas phase side valve 4.

[0120] The target opening can be calculated according to the first preset constant and the current opening of the gas phase side valve using the following formula:

[0121] LR4_n+1=0.95*LR4_n;

[0122] Wherein, LR4_n+1 is the target opening, LR4_n is the current opening, and 0.95 is the first preset constant.

[0123] It can be understood that if the comparison result is that the first current pressure P_9 is greater than or equal to the second current pressure P_8, that is, P_9 ≥ P_8, it means that the opening of the gas phase side valve 4 needs to be increased. The current opening of the gas phase side valve 4 can be obtained, and then the target opening is calculated based on the second preset constant and the current opening of the gas phase side valve 4.

[0124] The target opening can be calculated according to the second preset constant and the current opening of the gas phase side valve using the following formula:

[0125] LR4_n+1=1.05*LR4_n;

[0126] Among them, LR4_n+1 is the target opening, LR4_n is the current opening, and 1.05 is the second preset constant.

[0127] Step S406: adjusting the opening of the gas phase side valve according to the target opening.

[0128] It should be noted that the third preset time may be preset. For example, the third preset time may be set to 1 minute, which is not limited in this embodiment.

[0129] It is understood that after calculating the target opening corresponding to the gas-phase side valve 4, the opening of the gas-phase side valve 4 can be adjusted according to the target opening so that the opening of the gas-phase side valve 4 is adjusted to the target opening. Furthermore, when the gas-phase side valve 4 maintains operation at the target opening for a third preset time, that is, when the gas-phase side valve 4 maintains operation at the target opening for 1 minute, the first current pressure and the second current pressure are again obtained, and the current pressure difference between the first current pressure and the second current pressure is calculated. Subsequent detection operations are performed, and the cycle continues until the current pressure difference ΔP is less than the preset pressure value P0, that is, ΔP < P0.

[0130] It should be noted that the fourth preset time can be set in advance. For example, the fourth preset time can be set to 20 min, and this embodiment does not limit this.

[0131] It can be understood that if the current pressure difference ΔP is less than the preset pressure value P0, that is, ΔP < P0, it means that the opening of the gas-phase side valve 4 does not need to be adjusted currently. The current opening of the gas-phase side valve 4 can be controlled to remain unchanged, and the gas-phase side valve 4 is maintained to operate at the current opening for the fourth preset time. That is, when the gas-phase side valve 4 is maintained to operate at the current opening for 20 min, the first current pressure and the second current pressure are obtained again, the current pressure difference between the first current pressure and the second current pressure is calculated, and subsequent detection operations are performed, and the cycle continues.

[0132] In specific implementation, as Figure 6 shown Figure 6 is the overall process control schematic diagram, and the control logic is as follows:

[0133] 1. The gas-phase side valve 4 is locked within 3 min after the air conditioner is started and operates in the normal refrigeration mode.

[0134] 2. Record the average pressure P_ave_valve9 of the return air (the first pressure detection device 9) from the 3rd min to the 3 + n min.

[0135] 3. Calculate the initial opening LR4_0 of the gas-phase side valve 4 through the average pressure P_ave_valve9.

[0136] 4. Starting from the 3 + n min, open the gas-phase side valve 4 at the opening of LR4_0 and enter the phase separation refrigeration mode. The gaseous low-temperature refrigerant separated by the vapor-liquid separation device 6 passes through the heat exchanger 3 to increase the subcooling degree of the refrigerant at the outlet of the condenser; after the gaseous refrigerant passes through the heat exchanger, it converges with the refrigerant at the outlet of the evaporator and returns to the compressor through the return air pipe.

[0137] 5. The pressure difference ΔP between the gaseous side and the return air side of the vapor-liquid separation device is ΔP = P_8 - P_9, and it is judged whether the calculated ΔP is less than the preset pressure value P0.

[0138] 6. If ΔP > P0, then compare the pressures of P_8 and P_9.

[0139] 7. a. If P_9 < P_8, then LR4_n+1 = 0.95 * LR4_n;

[0140] If P_9 ≥ P_8, then LR4_n+1 = 1.05 * LR4_n;

[0141] 8. Repeat steps 5 - 7 until ΔP < P0;

[0142] 9. If ΔP < P0, then run in this state for 20 minutes and record P_8 and P_9 again, calculate ΔP, and compare ΔP with P0;

[0143] 10. This program is executed continuously during system operation for cyclic detection.

[0144] In this embodiment, the current pressure difference is determined by comparing the first current pressure detected by the first pressure detection device with the second current pressure detected by the second pressure detection device. The target opening is then adjusted based on this current pressure difference. This pressure feedback controls the gas flow rate, achieving precise control and avoiding control lag. Furthermore, pressure feedback ensures that the return air side is entirely filled with gaseous refrigerant, preventing compressor liquid hammer caused by liquid return and improving system reliability.

[0145] In addition, an embodiment of the present invention further provides a storage medium on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the steps of the air conditioner control method described above are implemented.

[0146] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0147] In addition, refer to Figure 7 The embodiment of the present invention further provides an air conditioner control device, the air conditioner control device comprising:

[0148] The phase separation refrigeration module 10 is used to open the gas phase side valve when the air conditioner is turned on for a first preset time to enter the phase separation refrigeration mode.

[0149] It should be noted that the gas-liquid separation device in this embodiment may be a gas-liquid separator, or any device that can achieve the same or similar functions, and this embodiment is not limited thereto. The heat exchanger in this embodiment may be a plate heat exchanger, or any device that can achieve the same or similar functions, and this embodiment is not limited thereto. The gas-phase side valve in this embodiment may be a solenoid valve, or any device that can achieve the same or similar functions, and this embodiment is not limited thereto.

[0150] It should be understood that Figure 3 As shown, Figure 3 Schematic diagram of an air conditioning system. The air conditioner in this embodiment may include a compressor 1, a condenser 2, and a heat exchanger 3. The outlet of the compressor 1 may be connected to the inlet of the condenser 2, which in turn may be connected to the inlet of the heat exchanger 3. The outlet of the heat exchanger 3 may be connected to the inlet of the gas-liquid separation device 6. Furthermore, a refrigeration valve 5 may be provided between the outlet of the heat exchanger 3 and the gas-liquid separation device 6.

[0151] It is understood that since the gas-liquid separation device can separate the refrigerant into gas and liquid, the gas-liquid separation device 6 is provided with one inlet and two outlets, the other outlets being a gas phase outlet and a liquid phase outlet. The gaseous refrigerant separated by the gas-liquid separation device 6 can flow out from the gas phase outlet, and the liquid refrigerant separated by the gas-liquid separation device 6 can flow out from the liquid phase outlet.

[0152] It is understood that the gas phase outlet of the gas-liquid separation device 6 can be connected to the other inlet of the heat exchanger 3, and the other outlet of the heat exchanger 3 can be connected to the inlet of the compressor. A gas phase side valve 4 can also be provided between the gas phase outlet of the gas-liquid separation device 6 and the other inlet of the heat exchanger 3. Specifically, the liquid phase outlet of the gas-liquid separation device 6 can be connected to the inlet of the evaporator 7, and the outlet of the evaporator 7 can be connected to the inlet of the compressor.

[0153] It is understood that the cooling mode of the air conditioner in this embodiment may include a normal cooling mode and a phase separation cooling mode. When the air conditioner is operating in the normal cooling mode, the cooling valve 5 can be controlled to open and the gas phase side valve 4 can be closed, and normal cooling operation is performed at this time. When the air conditioner is operating in the phase separation cooling mode, the cooling valve 5 can be controlled to open and the gas phase side valve 4 can also be opened. At this time, the gaseous low-temperature refrigerant separated by the gas-liquid separation device 6 and the heat exchanger 3 are used to re-exchange heat with the refrigerant at the condenser outlet after heat exchange in the condenser, thereby increasing the subcooling degree of the refrigerant to achieve a better cooling effect.

[0154] It should be noted that the second preset time and parameter n can be preset. For example, the second preset time can be set to 3 minutes, or other values. This embodiment does not limit this. In this embodiment, 3 minutes is used as an example for description. The first preset time can be calculated based on the second preset time and parameter n. For example, when the second preset time is 3 minutes, the first preset time can be calculated as 3+n minutes. This embodiment does not limit the specific value of parameter n.

[0155] It can be understood that when the air conditioner is just turned on for cooling, the air conditioner is controlled to enter the normal cooling mode. When the air conditioner is turned on for the first preset time, that is, when the air conditioner is turned on for cooling for 3+n min, the gas phase side valve is controlled to open to switch the normal cooling mode to the phase separation cooling mode.

[0156] The refrigerant control module 20 is used to control the gaseous low-temperature refrigerant separated by the gas-liquid separation device to reach the heat exchanger through the gas-phase side valve.

[0157] It should be understood that in the phase separation refrigeration mode, the gas-liquid separation equipment can be controlled to perform gas-liquid separation on the refrigerant to obtain the separated gaseous low-temperature refrigerant, and then the separated gaseous low-temperature refrigerant is controlled to flow out from the gas phase outlet corresponding to the gas-liquid separation equipment, and is conducted to the heat exchanger through the gas phase side valve 4 and flows into the other inlet of the heat exchanger.

[0158] The refrigeration enhancement module 30 is used to control the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger, so as to improve the supercooling degree of the refrigerant at the condenser outlet.

[0159] It can be understood that the refrigerant discharged from the compressor is converted into condenser outlet refrigerant after heat exchange in the condenser. The condenser outlet refrigerant flows into the inlet of the heat exchanger, and the gaseous low-temperature refrigerant separated by the gas-liquid separation equipment flows into the other inlet of the heat exchanger. Therefore, the condenser outlet refrigerant after heat exchange in the condenser can be heat-exchanged again by the gaseous low-temperature refrigerant in the heat exchanger, thereby improving the supercooling of the condenser outlet refrigerant and obtaining the condenser outlet refrigerant with improved supercooling. By exchanging heat with the indoor return air through the evaporator through the condenser outlet refrigerant with improved supercooling, a better cooling effect can be achieved.

[0160] It can be understood that this solution does not require the enlargement of the condenser and evaporator, and does not increase the cost too much. This solution adopts phase separation technology, which can greatly improve the energy efficiency of the air conditioner. The gaseous refrigerant separated by the gas-liquid separation equipment is used in the heat exchanger to increase the refrigerant supercooling, which can further improve the refrigeration capacity.

[0161] It should be understood that Figure 3 As shown, after the gaseous low-temperature refrigerant is controlled to enter the heat exchanger for heat exchange, the gaseous refrigerant after heat exchange through the heat exchanger and the evaporator outlet refrigerant after heat exchange through the evaporator are merged, and the refrigerant after the gaseous refrigerant and the evaporator outlet refrigerant are transmitted to the return air pipe and enter the compressor through the return air pipe.

[0162] In this embodiment, after the air conditioner is turned on and runs for a period of time, the gas phase side valve is controlled to open, so that the air conditioner is switched to the phase separation refrigeration mode. In the phase separation refrigeration mode, the gaseous low-temperature refrigerant can be separated by the gas-liquid separation equipment, and the gaseous low-temperature refrigerant is controlled to reach the heat exchanger. The refrigerant at the condenser outlet is heat-exchanged again through the gaseous low-temperature refrigerant and the heat exchanger, thereby increasing the supercooling of the refrigerant at the condenser outlet to increase the cooling capacity of the air conditioner. Compared with the existing method of increasing the evaporator and condenser, this solution adopts phase separation technology, which can not only improve the refrigeration capacity, but also does not require too much increase in cost.

[0163] For other embodiments or specific implementation methods of the air conditioner control device of the present invention, reference may be made to the above-mentioned method embodiments, which will not be described in detail here.

[0164] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0165] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0166] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling an intelligent device (which can be a mobile phone, computer, air conditioner, or network air conditioner, etc.) to execute the methods described in each embodiment of the present invention.

[0167] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes a compressor, a condenser, and a heat exchanger connected in sequence, and further includes a gas-liquid separation device, the outlet of the heat exchanger is connected to the inlet of the gas-liquid separation device, the gas phase outlet of the gas-liquid separation device is connected to the other inlet of the heat exchanger, and a gas phase side valve is provided between the gas phase outlet of the gas-liquid separation device and the other inlet of the heat exchanger; The air conditioner control method comprises the following steps: When the air conditioner is turned on for a first preset time, the gas phase side valve is opened to enter the phase separation refrigeration mode; Controlling the gaseous low-temperature refrigerant separated by the gas-liquid separation device to reach the heat exchanger through the gas phase side valve; and Controlling the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger to increase the supercooling degree of the refrigerant at the condenser outlet; The air conditioner further includes an evaporator and a first pressure detection device, the liquid phase outlet of the gas-liquid separation device is connected to the evaporator, the evaporator is connected to the compressor, and the first pressure detection device is provided on the pipeline between the evaporator and the compressor; When the air conditioner is turned on for the first preset time, before the gas phase side valve is opened, the method further includes: During the second preset time after the air conditioner is turned on, the gas phase side valve is controlled to be closed and the air conditioner operates in a normal cooling mode; determining a target time period according to the second preset time and the first preset time, and obtaining an average pressure corresponding to the first pressure detection device within the target time period; and determining an initial opening according to the average pressure; Correspondingly, when the air conditioner is turned on for the first preset time, the gas phase side valve is opened, including: When the air conditioner is turned on for a first preset time, the gas phase side valve is opened according to the initial opening degree.

2. The air conditioner control method according to claim 1, wherein: The air conditioner further comprises a second pressure detection device, which is arranged on the pipeline between the gas phase outlet of the gas-liquid separation device and the gas phase side valve; After controlling the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger, the method further includes: Acquire a first current pressure corresponding to the first pressure detection device and a second current pressure corresponding to the second pressure detection device; calculating a current pressure difference according to the first current pressure and the second current pressure; Determining whether the current pressure difference is less than a preset pressure value; If the current pressure difference is not less than a preset pressure value, comparing the first current pressure with the second current pressure; Determine the target opening degree based on the comparison result and the current opening degree; and The opening of the gas phase side valve is adjusted according to the target opening.

3. The air conditioner control method according to claim 2, wherein: Determining the target opening according to the comparison result and the current opening includes: If the comparison result shows that the first current pressure is less than the second current pressure, determining a target opening according to a first preset constant and the current opening; and If the comparison result shows that the first current pressure is greater than or equal to the second current pressure, the target opening is determined according to the second preset constant and the current opening.

4. The air conditioner control method according to claim 2, wherein: After adjusting the opening of the gas phase side valve according to the target opening, the method further includes: After the gas phase side valve maintains the target opening for a third preset time, the process returns to the step of obtaining the first current pressure corresponding to the first pressure detection device and the second current pressure corresponding to the second pressure detection device.

5. The air conditioner control method according to claim 2, wherein: After determining whether the current pressure difference is less than the preset pressure value, the method further includes: If the current pressure difference is less than the preset pressure value, the current opening of the gas phase side valve is kept unchanged; and After the gas phase side valve maintains the current opening for a fourth preset time, the process returns to the step of obtaining the first current pressure corresponding to the first pressure detection device and the second current pressure corresponding to the second pressure detection device.

6. The air conditioner control method according to claim 1, wherein: After controlling the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger, the method further includes: Controlling the gaseous refrigerant after passing through the heat exchanger to merge with the refrigerant at the evaporator outlet to obtain a merged refrigerant; and The refrigerant after control and confluence returns to the compressor through the return pipe.

7. An air conditioner control device, characterized in that: The air conditioner control device comprises: The phase separation refrigeration module is used to open the gas phase side valve when the air conditioner is turned on for a first preset time to enter the phase separation refrigeration mode; A refrigerant control module, used to control the gaseous low-temperature refrigerant separated by the gas-liquid separation device to reach the heat exchanger through the gas phase side valve; A refrigeration enhancement module, configured to control the gaseous low-temperature refrigerant to exchange heat with the refrigerant at the condenser outlet through the heat exchanger, so as to increase the supercooling degree of the refrigerant at the condenser outlet; The phase separation refrigeration module is also used to control the gas phase side valve to close and operate in normal refrigeration mode within the second preset time when the air conditioner is turned on; determine the target time period based on the second preset time and the first preset time, and obtain the average pressure corresponding to the first pressure detection device within the target time period; and determine the initial opening based on the average pressure; when the air conditioner is turned on for the first preset time, open the gas phase side valve according to the initial opening.

8. An air conditioner, characterized in that: The air conditioner includes a compressor, a condenser, and a heat exchanger connected in sequence, and further includes a gas-liquid separation device, the outlet of the heat exchanger is connected to the inlet of the gas-liquid separation device, the gas phase outlet of the gas-liquid separation device is connected to the other inlet of the heat exchanger, and a gas phase side valve is provided between the gas phase outlet of the gas-liquid separation device and the other inlet of the heat exchanger; The air conditioner further comprises: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program implements the air conditioner control method according to any one of claims 1 to 6 when executed by the processor.

9. A storage medium, characterized in that: The storage medium stores an air conditioner control program, and when the air conditioner control program is executed by the processor, the air conditioner control method according to any one of claims 1 to 6 is implemented.

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