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

Abstract

The application discloses an air conditioner control method and device, an air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application determines whether the spray enthalpy function needs to be started when the air conditioner is in a refrigeration mode; when it is determined that the spray enthalpy function needs to be started, the spray enthalpy electromagnetic valve is started, and the auxiliary road outlet temperature and the auxiliary road inlet temperature of an economizer are obtained; and the current opening degree of the spray enthalpy electronic expansion valve is controlled according to the auxiliary road outlet temperature and the auxiliary road inlet temperature. By adopting the jet enthalpy increasing system, the current opening degree of the spray enthalpy electronic expansion valve is adjusted in combination with the control logic, so that the refrigeration capacity of the system can be further improved without changing the specifications of the heat exchanger and the compressor, the rotating speed of the outdoor fan and the frequency of the compressor.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner control method, device, air conditioner, and storage medium. Background Technology

[0002] As outdoor temperatures gradually rise in summer, and air conditioner outdoor units are often forced to be installed in grilles due to installation constraints, both factors reduce the heat exchange capacity of the outdoor unit during cooling operation, thus significantly reducing cooling performance. Current technologies generally address this issue by: increasing the outdoor unit fan speed to increase the outdoor unit's heat transfer coefficient; increasing the compressor's operating frequency to increase the refrigerant circulation volume per unit time; and increasing the size of the outdoor unit's heat exchanger or using a larger displacement compressor to improve capacity.

[0003] However, the above methods have the problem that forcibly increasing the outdoor unit's fan speed will lead to increased fan noise during actual operation, affecting the user experience. While increasing the compressor's operating frequency can improve high-temperature cooling capacity to some extent, forcibly increasing the frequency under high-temperature conditions will result in higher system pressure and higher exhaust temperature, thus affecting the compressor's reliability. Increasing the size of the outdoor unit's heat exchanger or using a larger displacement compressor, besides increasing the overall material cost and increasing the size of the outdoor unit, thus limiting installation scenarios, will also limit the energy-saving effect under low-load operation in non-high-temperature conditions.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide an air conditioner control method, device, air conditioner, and storage medium, aiming to solve the technical problems of existing technologies that generate negative effects such as fan noise, reduced compressor reliability, and high cost and difficulty in installation in order to improve performance.

[0006] To achieve the above objectives, the present invention provides an air conditioner control method, wherein the air conditioner includes: an economizer, an electronic expansion valve for enthalpy injection, and an enthalpy injection solenoid valve. The inlet of the economizer is connected to the electronic expansion valve for enthalpy injection, the outlet of the economizer is connected to one end of the solenoid valve for enthalpy injection, and the other end of the solenoid valve for enthalpy injection is connected to the injection port of the compressor. The air conditioner control method includes:

[0007] When the air conditioner is in cooling mode, determine whether the spray enthalpy function needs to be turned on.

[0008] When it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained; and

[0009] The current opening degree of the injection enthalpy electronic expansion valve is controlled based on the auxiliary road outlet temperature and the auxiliary road inlet temperature.

[0010] Optionally, controlling the current opening degree of the injection enthalpy electronic expansion valve based on the auxiliary road outlet temperature and the auxiliary road inlet temperature includes:

[0011] Determine if this is the first time the spray enthalpy function has been activated;

[0012] If so, the current opening of the electronic expansion valve is adjusted to the preset opening, and the duration for which the current opening of the electronic expansion valve is maintained at the preset opening is recorded.

[0013] When the duration reaches a preset duration, the auxiliary circuit superheat is determined based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature; and

[0014] When the superheat of the auxiliary circuit is between the first superheat and the second superheat, the electronic expansion valve for injecting enthalpy is controlled to remain at its current opening, where the first superheat is less than the second superheat.

[0015] Optionally, the method further includes:

[0016] When the superheat of the auxiliary circuit is less than the first superheat, the current opening of the enthalpy electronic expansion valve is reduced according to a preset adjustment frequency and a preset reduction amplitude.

[0017] Optionally, the method further includes:

[0018] When the superheat of the auxiliary circuit is greater than the second superheat, the current opening of the enthalpy-injected electronic expansion valve is compared with the first opening and the second opening, respectively, and the first opening is less than the second opening; and

[0019] The current opening degree is adjusted based on the comparison results.

[0020] Optionally, adjusting the current opening degree based on the comparison result includes:

[0021] When the current opening degree is less than the first opening degree, the current opening degree is increased according to a preset adjustment frequency and a first increase.

[0022] When the current opening degree is between the first opening degree and the second opening degree, the current opening degree is increased according to a preset adjustment frequency and a second increment; and

[0023] When the current opening degree is greater than the second opening degree, the current opening degree is increased according to a preset adjustment frequency and a third increase, wherein the first increase is greater than the second increase and the second increase is greater than the third increase.

[0024] Optionally, determining whether the spray enthalpy function needs to be activated includes:

[0025] Obtain the current operating frequency of the compressor;

[0026] If the current operating frequency is less than the preset operating frequency, it is determined that the enthalpy injection function will not be activated.

[0027] When the current operating frequency is greater than or equal to the preset operating frequency, the current outdoor ambient temperature is obtained; and

[0028] Determine whether to activate the enthalpy injection function based on the current outdoor ambient temperature.

[0029] Optionally, determining whether to activate the enthalpy spraying function based on the current outdoor ambient temperature includes:

[0030] When the current outdoor ambient temperature is greater than or equal to the preset temperature, the current compressor discharge temperature is obtained;

[0031] When the current compressor exhaust temperature is lower than the exhaust temperature threshold, it is determined that the enthalpy injection function will not be activated.

[0032] When the current compressor exhaust temperature is greater than or equal to the exhaust temperature threshold, the enthalpy injection function is activated.

[0033] When the current outdoor ambient temperature is lower than the preset temperature, the subcooling degree of the air conditioner is obtained;

[0034] When the supercooling degree is less than the supercooling threshold, the enthalpy injection function is activated; and

[0035] When the supercooling degree is greater than or equal to the supercooling threshold, it is determined that the enthalpy injection function will not be activated.

[0036] Furthermore, to achieve the above objectives, the present invention also proposes an air conditioner control device, wherein the air conditioner includes: an economizer, an electronic expansion valve for enthalpy injection, and an enthalpy injection solenoid valve. The inlet of the economizer is connected to the electronic expansion valve for enthalpy injection, the outlet of the economizer is connected to one end of the solenoid valve for enthalpy injection, and the other end of the solenoid valve for enthalpy injection is connected to the injection port of the compressor. The air conditioner control device includes:

[0037] The judgment module is used to determine whether the spray enthalpy function needs to be turned on when the air conditioner is in cooling mode.

[0038] The acquisition module is used to activate the enthalpy injection solenoid valve and acquire the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer when it is determined that the enthalpy injection function needs to be activated; and

[0039] The control module is used to control the current opening degree of the injection enthalpy electronic expansion valve based on the auxiliary road outlet temperature and the auxiliary road inlet temperature.

[0040] Furthermore, to achieve the above objectives, the present invention also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and an air conditioner control program stored in the memory and running on the processor, the air conditioner control program being configured to implement the air conditioner control method as described above.

[0041] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing an air conditioner control program, which, when executed by a processor, implements the air conditioner control method as described above.

[0042] This invention determines whether the enthalpy injection function needs to be activated when the air conditioner is in cooling mode; when it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained; and the current opening degree of the enthalpy injection electronic expansion valve is controlled according to the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature. By adopting an enthalpy injection system and combining control logic to adjust the current opening degree of the enthalpy injection electronic expansion valve, the cooling capacity of the system can be further improved without changing the specifications of the heat exchanger and compressor, the outdoor fan speed, and the compressor frequency. Attached Figure Description

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

[0044] Figure 2 This is a flowchart illustrating the first embodiment of the air conditioner control method of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of an air conditioner in one embodiment of the air conditioner control method of the present invention;

[0046] Figure 4 This is a flowchart illustrating the second embodiment of the air conditioner control method of the present invention;

[0047] Figure 5 This is a flowchart illustrating the third embodiment of the air conditioner control method of the present invention;

[0048] Figure 6 This is a structural block diagram of the first embodiment of the air conditioner control device of the present invention.

[0049] Explanation of icon numbers:

[0050] label name label name 1 Condenser 6 Auxiliary road inlet temperature sensor 2 Evaporator 7 Electronic expansion valve for injection enthalpy 3 Throttling components 8 Subcooled liquid line temperature sensor 4 Injection enthalpy solenoid valve 9 Economic instruments 5 Auxiliary road outlet temperature sensor

[0051] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0053] Reference Figure 1 , Figure 1 This is a schematic diagram of the air conditioner structure in the hardware operating environment involved in the embodiments of the present invention.

[0054] 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. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0055] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the air conditioner and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0056] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and an air conditioner control program.

[0057] exist Figure 1 In the air conditioner shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the air conditioner of the present invention can be set in the air conditioner, and the air conditioner calls the air conditioner control program stored in the memory 1005 through the processor 1001 and executes the air conditioner control method provided in the embodiment of the present invention.

[0058] This invention provides an air conditioner control method, referring to... Figure 2 , Figure 2This is a flowchart illustrating the first embodiment of an air conditioner control method according to the present invention.

[0059] In this embodiment, the air conditioner control method includes the following steps:

[0060] Step S10: When the air conditioner is in cooling mode, determine whether the spray enthalpy function needs to be turned on.

[0061] In this embodiment, the executing entity can be the air conditioner, which has functions such as data processing, data communication, and program execution. The air conditioner can be a controller inside the air conditioner. Of course, other devices with similar functions can also be used, and this embodiment does not limit this. For ease of explanation, this embodiment uses an air conditioner as an example.

[0062] It should be noted that with the gradual increase in outdoor ambient temperature during the summer, and the fact that air conditioner outdoor units are often forced to be installed in grilles due to their location, the heat exchange capacity on the outdoor side of the air conditioner deteriorates under cooling conditions, thus significantly reducing cooling efficiency. Current technologies generally address this issue by: increasing the outdoor unit fan speed to increase the outdoor unit's heat exchange coefficient; increasing the compressor's operating frequency to increase the refrigerant circulation volume per unit time; and increasing the size of the outdoor unit's heat exchanger or using a larger displacement compressor to improve capacity. However, these methods have drawbacks. Forcibly increasing the outdoor unit fan speed leads to increased fan noise during actual operation, affecting the user experience. While increasing the compressor's operating frequency can improve high-temperature cooling capacity to some extent, forcibly increasing the frequency under high-temperature conditions can lead to higher system pressure and higher exhaust temperature, thus affecting compressor reliability. Increasing the size of the outdoor unit's heat exchanger or using a larger displacement compressor, besides increasing the overall material cost and limiting installation options due to the larger outdoor unit size, also limits energy-saving performance under low-load operation conditions (not high-temperature conditions).

[0063] To address the aforementioned technical issues, this embodiment determines whether the enthalpy injection function needs to be activated when the air conditioner is in cooling mode. If it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained. Furthermore, the current opening degree of the enthalpy injection electronic expansion valve is controlled based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature. By employing an enthalpy injection system and combining it with control logic to adjust the current opening degree of the enthalpy injection electronic expansion valve, the cooling capacity of the system can be further improved without changing the specifications of the heat exchanger and compressor, the outdoor fan speed, and the compressor frequency. Specifically, this can be achieved as follows.

[0064] In this specific implementation, an air conditioner is first proposed, and the specific structure of the air conditioner is as follows: Figure 3As shown, the air conditioner in this embodiment includes a condenser 1, an evaporator 2, a throttling component 3, an enthalpy injection solenoid valve 4, an auxiliary circuit outlet temperature sensor 5, an auxiliary circuit inlet temperature sensor 6, an enthalpy injection electronic expansion valve 7, a subcooled liquid pipe temperature sensor 8, and an economizer 9. Figure 3 The diagram shown is only a partial flow path diagram of the air conditioner; the compressor and other components are not shown in the flow path diagram. The inlet of the economizer 9 is connected to the electronic expansion valve 5, the outlet of the economizer 9 is connected to one end of the solenoid valve 4, and the other end of the solenoid valve 4 is connected to the compressor's injection port. This solution can further increase the subcooling of the system by using a vapor injection enthalpy enhancement system and its control logic, thereby further increasing the enthalpy difference on the evaporator side and improving the system's cooling capacity, without increasing the outdoor unit fan speed and compressor frequency, or increasing the size of the outdoor unit heat exchanger and compressor displacement. It also adds exhaust temperature control to prevent excessively high exhaust temperatures during high-temperature cooling. In addition, it adds auxiliary circuit superheat control to ensure that the refrigerant returning to the compressor's enthalpy injection port has a certain superheat, thus avoiding liquid return and ensuring compressor reliability. When adjusting the electronic expansion valve, different opening adjustment rates are applied according to the current opening degree, ensuring rapid attainment of auxiliary circuit superheat while significantly reducing the risk of liquid return in the auxiliary circuit.

[0065] In this specific implementation, the focus is on improving the cooling capacity of the air conditioner. Therefore, before executing the relevant controls, it is necessary to first detect whether the air conditioner is in cooling mode. If the air conditioner is in cooling mode, then it is further determined whether the enthalpy injection function needs to be activated. Specifically, in this embodiment, the determination of whether the enthalpy injection function needs to be activated can be based on the compressor's operating frequency, outdoor ambient temperature, compressor exhaust temperature, and the subcooling degree of the air conditioning system.

[0066] Step S20: When it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is activated, and the auxiliary outlet temperature and auxiliary inlet temperature of the economizer are obtained.

[0067] In specific implementation, after determining that the injection enthalpy function needs to be activated, this embodiment will first activate the injection enthalpy solenoid valve, and then obtain the auxiliary outlet temperature and auxiliary inlet temperature of the economizer by setting temperature sensors at the auxiliary outlet and inlet respectively.

[0068] Step S30: Control the current opening degree of the injection enthalpy electronic expansion valve according to the auxiliary road outlet temperature and the auxiliary road inlet temperature.

[0069] In practical implementation, after activating the enthalpy injection function, this embodiment requires further adjustment of the current opening degree of the enthalpy injection electronic expansion valve related to the enthalpy injection function to regulate the overall cooling capacity of the air conditioner. Specifically, in this embodiment, the auxiliary circuit superheat can be calculated based on the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature obtained above, and then the current opening degree of the enthalpy injection electronic expansion valve can be adjusted based on the auxiliary circuit superheat.

[0070] This embodiment determines whether the enthalpy injection function needs to be activated when the air conditioner is in cooling mode. If it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained. The current opening degree of the enthalpy injection electronic expansion valve is controlled according to the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature. By adopting an enthalpy injection system and combining control logic to adjust the current opening degree of the enthalpy injection electronic expansion valve, the cooling capacity of the system can be further improved without changing the specifications of the heat exchanger and compressor, the outdoor fan speed, and the compressor frequency.

[0071] refer to Figure 4 , Figure 4 This is a flowchart illustrating a second embodiment of an air conditioner control method according to the present invention.

[0072] Based on the first embodiment described above, in the air conditioner control method of this embodiment, step S30 specifically includes:

[0073] Step S301: Determine whether this is the first time the spray enthalpy function has been activated.

[0074] In specific implementation, before adjusting the current opening of the electronic expansion valve for enthalpy injection, that is, after activating the enthalpy injection function, it is necessary to first determine whether this activation of the enthalpy injection function is the first activation. The first activation is based on whether the enthalpy injection function has been activated during the entire cycle of the compressor from start to stop.

[0075] Step S302: If yes, adjust the current opening of the enthalpy electronic expansion valve to a preset opening and record the duration for which the current opening of the enthalpy electronic expansion valve is maintained at the preset opening.

[0076] In practice, if the enthalpy injection function has already been activated, that is, if it is not the first time the enthalpy injection function has been activated, the opening of the enthalpy injection electronic expansion valve has already been adjusted when the enthalpy injection function was activated last time. Therefore, if it is not the first time the enthalpy injection function has been activated, the adjustment in this embodiment is based on the current opening of the enthalpy injection electronic expansion valve.

[0077] Furthermore, if it is the first time the enthalpy injection function is activated, in order to ensure that the adjustment is based on the same standard, in this case, the current opening of the enthalpy injection electronic expansion valve will be adjusted to the preset opening, and then the enthalpy injection electronic expansion valve will be controlled to maintain the preset opening for a period of time. The preset opening can be set according to actual needs, and this embodiment does not impose any restrictions on it.

[0078] Step S303: When the duration reaches the preset duration, determine the superheat of the auxiliary circuit based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature.

[0079] In practice, the preset duration can be set to 30 seconds. That is, after the electronic expansion valve maintains the preset opening for 30 seconds, the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature are further obtained. The auxiliary circuit superheat can be calculated based on the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature. For example, the auxiliary circuit superheat can be the auxiliary circuit outlet temperature minus the auxiliary circuit inlet temperature.

[0080] Step S304: When the superheat of the auxiliary circuit is between the first superheat and the second superheat, control the electronic expansion valve of the injection enthalpy to maintain the current opening.

[0081] In this embodiment, after obtaining the auxiliary circuit superheat, it is necessary to compare the auxiliary circuit superheat with the first superheat and the second superheat, respectively, wherein the first superheat is less than the second superheat. Specifically, when the auxiliary circuit superheat is between the first superheat and the second superheat, in this case, the enthalpy injection electronic expansion valve is controlled to maintain its current opening without adjustment. If the auxiliary circuit superheat is less than the first superheat, in this case, the current opening of the enthalpy injection electronic expansion valve is reduced according to a preset adjustment frequency and a preset reduction amount, for example, the current opening of the enthalpy injection electronic expansion valve is reduced by B1 every 5 seconds.

[0082] Furthermore, if the auxiliary circuit superheat is greater than the second superheat, this embodiment requires further comparison of the current opening of the enthalpy-injected electronic expansion valve with the first and second openings, where the first opening is less than the second opening. Specifically, when the current opening is less than the first opening, the current opening is increased according to a preset adjustment frequency and a first increment, for example, increasing the current opening of the enthalpy-injected electronic expansion valve by C1 every 5 seconds. When the current opening is between the first and second openings, the current opening is increased according to a preset adjustment frequency and a second increment, for example, increasing the current opening of the enthalpy-injected electronic expansion valve by C2 every 5 seconds. When the current opening is greater than the second opening, the current opening is increased according to a preset adjustment frequency and a third increment, for example, increasing the current opening of the enthalpy-injected electronic expansion valve by C3 every 5 seconds. It should be emphasized that when the current opening of the enthalpy-injected electronic expansion valve is at a small opening, the opening needs to be opened quickly to rapidly reduce the auxiliary circuit superheat. When the current opening of the electronic expansion valve is large, to prevent excessive opening and subsequent liquid return in the auxiliary circuit, the increase in opening is correspondingly smaller. Therefore, the first increase is greater than the second increase, and the second increase is greater than the third increase. The preset adjustment frequency, preset reduction, first increase, second increase, and third increase can all be set according to actual needs. After each opening adjustment, the magnitude of the superheat in the auxiliary circuit needs to be reassessed.

[0083] This embodiment adjusts the current opening of the electronic expansion valve to a preset opening when the enthalpy injection function is first activated, and controls the electronic expansion valve to maintain the preset opening for a preset time. After the preset time is reached, the superheat of the auxiliary circuit is determined based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature. If the superheat of the auxiliary circuit is between the first superheat and the second superheat, the electronic expansion valve is controlled to maintain its current opening. If the superheat of the auxiliary circuit is less than the first superheat, the current opening of the electronic expansion valve is reduced according to a preset adjustment frequency and a preset reduction amount. If the superheat in the auxiliary circuit is greater than the second superheat, the current opening of the electronic expansion valve is compared with the first and second openings respectively. Based on the comparison results, the current opening is increased according to a preset adjustment frequency and different increments. This ensures that the refrigerant returning to the compressor enthalpy port from the auxiliary circuit has a certain superheat, thereby avoiding liquid return and ensuring the reliability of the compressor. Furthermore, when adjusting the electronic expansion valve, different opening adjustment rates are applied according to the current opening, which not only ensures that the superheat of the auxiliary circuit is reached quickly but also greatly reduces the risk of liquid return from the auxiliary circuit.

[0084] refer to Figure 5 , Figure 5 This is a flowchart illustrating a third embodiment of an air conditioner control method according to the present invention.

[0085] Based on the first embodiment described above, in the air conditioner control method of this embodiment, step S10 specifically includes:

[0086] Step S101: Obtain the current operating frequency of the compressor.

[0087] Step S102: When the current operating frequency is less than the preset operating frequency, it is determined that the enthalpy injection function will not be turned on.

[0088] In this embodiment, after the outdoor unit starts the cooling mode, it is necessary to first obtain the current operating frequency of the compressor. If the current operating frequency is less than the preset operating frequency, it is determined that the enthalpy injection function does not need to be turned on.

[0089] Step S103: When the current operating frequency is greater than or equal to the preset operating frequency, the current outdoor ambient temperature is obtained.

[0090] In practice, if the current operating frequency is greater than or equal to the preset operating frequency, the current outdoor ambient temperature is then obtained.

[0091] Step S104: Determine whether to activate the spray enthalpy function based on the current outdoor ambient temperature.

[0092] In specific implementation, after obtaining the current outdoor ambient temperature, this embodiment compares the current outdoor ambient temperature with a preset temperature. If the current outdoor ambient temperature is greater than or equal to the preset temperature, the current compressor exhaust temperature is then obtained. If the current compressor exhaust temperature is less than the exhaust temperature threshold, it is determined that the enthalpy injection function does not need to be activated. If the current compressor exhaust temperature is greater than or equal to the exhaust temperature threshold, it is determined that the enthalpy injection function needs to be activated.

[0093] Furthermore, if the current outdoor ambient temperature is lower than the preset temperature, the subcooling degree of the air conditioner is obtained. The subcooling degree of the air conditioner can be obtained by subtracting the temperature of the subcooled liquid pipe at the main outlet of the economizer from the saturation temperature corresponding to the exhaust pressure. If the subcooling degree is less than the subcooling degree threshold, it is determined that the enthalpy injection function needs to be turned on. If the subcooling degree is greater than or equal to the subcooling degree threshold, it is determined that the enthalpy injection function does not need to be turned on.

[0094] This embodiment obtains the current operating frequency of the compressor. When the current operating frequency is less than a preset operating frequency, it determines that the enthalpy injection function is not activated. When the current operating frequency is greater than or equal to the preset operating frequency, it obtains the current outdoor ambient temperature. When the current outdoor ambient temperature is greater than or equal to the preset temperature, it obtains the current compressor discharge temperature. When the current compressor discharge temperature is less than a discharge temperature threshold, it determines that the enthalpy injection function is not activated. When the current compressor discharge temperature is greater than or equal to the discharge temperature threshold, it determines that the enthalpy injection function is activated. When the current outdoor ambient temperature is less than the preset temperature, it obtains the subcooling degree of the air conditioner. When the subcooling degree is less than a subcooling degree threshold, it determines that the enthalpy injection function is activated. When the subcooling degree is greater than or equal to the subcooling degree threshold, it determines that the enthalpy injection function is not activated. By making the above judgments, the timing of enthalpy injection function activation can be more accurate and reasonable, thereby improving the cooling capacity of the system.

[0095] Furthermore, this embodiment of the invention also proposes a storage medium storing an air conditioner control program, which, when executed by a processor, implements the steps of the air conditioner control method described above.

[0096] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0097] Reference Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the air conditioner control device of the present invention.

[0098] like Figure 6 As shown, the air conditioner control device proposed in this embodiment of the invention includes:

[0099] The judgment module 10 is used to determine whether the spray enthalpy function needs to be turned on when the air conditioner is in cooling mode.

[0100] In this embodiment, the executing entity can be the air conditioner, which has functions such as data processing, data communication, and program execution. The air conditioner can be a controller inside the air conditioner. Of course, other devices with similar functions can also be used, and this embodiment does not limit this. For ease of explanation, this embodiment uses an air conditioner as an example.

[0101] It should be noted that with the gradual increase in outdoor ambient temperature during the summer, and the fact that air conditioner outdoor units are often forced to be installed in grilles due to their location, the heat exchange capacity on the outdoor side of the air conditioner deteriorates under cooling conditions, thus significantly reducing cooling efficiency. Current technologies generally address this issue by: increasing the outdoor unit fan speed to increase the outdoor unit's heat exchange coefficient; increasing the compressor's operating frequency to increase the refrigerant circulation volume per unit time; and increasing the size of the outdoor unit's heat exchanger or using a larger displacement compressor to improve capacity. However, these methods have drawbacks. Forcibly increasing the outdoor unit fan speed leads to increased fan noise during actual operation, affecting the user experience. While increasing the compressor's operating frequency can improve high-temperature cooling capacity to some extent, forcibly increasing the frequency under high-temperature conditions can lead to higher system pressure and higher exhaust temperature, thus affecting compressor reliability. Increasing the size of the outdoor unit's heat exchanger or using a larger displacement compressor, besides increasing the overall material cost and limiting installation options due to the larger outdoor unit size, also limits energy-saving performance under low-load operation conditions (not high-temperature conditions).

[0102] To address the aforementioned technical issues, this embodiment determines whether the enthalpy injection function needs to be activated when the air conditioner is in cooling mode. If it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained. Furthermore, the current opening degree of the enthalpy injection electronic expansion valve is controlled based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature. By employing an enthalpy injection system and combining it with control logic to adjust the current opening degree of the enthalpy injection electronic expansion valve, the cooling capacity of the system can be further improved without changing the specifications of the heat exchanger and compressor, the outdoor fan speed, and the compressor frequency. Specifically, this can be achieved as follows.

[0103] In this specific implementation, an air conditioner is first proposed, and the specific structure of the air conditioner is as follows: Figure 3 As shown, the air conditioner in this embodiment includes a condenser 1, an evaporator 2, a throttling component 3, an enthalpy injection solenoid valve 4, an auxiliary circuit outlet temperature sensor 5, an auxiliary circuit inlet temperature sensor 6, an enthalpy injection electronic expansion valve 7, a subcooled liquid pipe temperature sensor 8, and an economizer 9. Figure 3The diagram shown is only a partial flow path diagram of the air conditioner; the compressor and other components are not shown in the flow path diagram. The inlet of the economizer 9 is connected to the electronic expansion valve 5, the outlet of the economizer 9 is connected to one end of the solenoid valve 4, and the other end of the solenoid valve 4 is connected to the compressor's injection port. This solution can further increase the subcooling of the system by using a vapor injection enthalpy enhancement system and its control logic, thereby further increasing the enthalpy difference on the evaporator side and improving the system's cooling capacity, without increasing the outdoor unit fan speed and compressor frequency, or increasing the size of the outdoor unit heat exchanger and compressor displacement. It also adds exhaust temperature control to prevent excessively high exhaust temperatures during high-temperature cooling. In addition, it adds auxiliary circuit superheat control to ensure that the refrigerant returning to the compressor's enthalpy injection port has a certain superheat, thus avoiding liquid return and ensuring compressor reliability. When adjusting the electronic expansion valve, different opening adjustment rates are applied according to the current opening degree, ensuring rapid attainment of auxiliary circuit superheat while significantly reducing the risk of liquid return in the auxiliary circuit.

[0104] In this specific implementation, the focus is on improving the cooling capacity of the air conditioner. Therefore, before executing the relevant controls, it is necessary to first detect whether the air conditioner is in cooling mode. If the air conditioner is in cooling mode, then it is further determined whether the enthalpy injection function needs to be activated. Specifically, in this embodiment, the determination of whether the enthalpy injection function needs to be activated can be based on the compressor's operating frequency, outdoor ambient temperature, compressor exhaust temperature, and the subcooling degree of the air conditioning system.

[0105] The acquisition module 20 is used to open the enthalpy injection solenoid valve when it is determined that the enthalpy injection function needs to be activated, and to acquire the auxiliary outlet temperature and auxiliary inlet temperature of the economizer.

[0106] In specific implementation, after determining that the injection enthalpy function needs to be activated, this embodiment will first activate the injection enthalpy solenoid valve, and then obtain the auxiliary outlet temperature and auxiliary inlet temperature of the economizer by setting temperature sensors at the auxiliary outlet and inlet respectively.

[0107] The control module 30 is used to control the current opening degree of the injection enthalpy electronic expansion valve according to the auxiliary road outlet temperature and the auxiliary road inlet temperature.

[0108] In practical implementation, after activating the enthalpy injection function, this embodiment requires further adjustment of the current opening degree of the enthalpy injection electronic expansion valve related to the enthalpy injection function to regulate the overall cooling capacity of the air conditioner. Specifically, in this embodiment, the auxiliary circuit superheat can be calculated based on the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature obtained above, and then the current opening degree of the enthalpy injection electronic expansion valve can be adjusted based on the auxiliary circuit superheat.

[0109] This embodiment determines whether the enthalpy injection function needs to be activated when the air conditioner is in cooling mode. If it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained. The current opening degree of the enthalpy injection electronic expansion valve is controlled according to the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature. By adopting an enthalpy injection system and combining control logic to adjust the current opening degree of the enthalpy injection electronic expansion valve, the cooling capacity of the system can be further improved without changing the specifications of the heat exchanger and compressor, the outdoor fan speed, and the compressor frequency.

[0110] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0111] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0112] In addition, for technical details not described in detail in this embodiment, please refer to the air conditioner control method provided in any embodiment of the present invention, which will not be repeated here.

[0113] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0114] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0115] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. 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. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0116] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

[0117] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

Claims

1. An air conditioner control method, characterized in that, The air conditioner includes: an economizer, an electronic expansion valve for enthalpy injection, and an enthalpy injection solenoid valve. The inlet of the economizer is connected to the electronic expansion valve for enthalpy injection, the outlet of the economizer is connected to one end of the solenoid valve for enthalpy injection, and the other end of the solenoid valve for enthalpy injection is connected to the injection port of the compressor. The air conditioner control method includes: When the air conditioner is in cooling mode, it is determined whether the enthalpy injection function needs to be turned on. The determination is based on the compressor's operating frequency, outdoor ambient temperature, compressor discharge temperature, and the air conditioner's subcooling degree. When it is determined that the enthalpy injection function needs to be activated, the enthalpy injection solenoid valve is opened, and the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer are obtained; and Controlling the current opening of the electronic expansion valve based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature includes: determining whether the enthalpy injection function is being activated for the first time; if so, adjusting the current opening of the electronic expansion valve to a preset opening and recording the duration for which the current opening of the electronic expansion valve is maintained at the preset opening; when the duration reaches the preset duration, determining the auxiliary circuit superheat based on the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature; when the auxiliary circuit superheat is between a first superheat and a second superheat, controlling the electronic expansion valve to maintain its current opening, wherein the first superheat is less than the second superheat.

2. The air conditioner control method as described in claim 1, characterized in that, The method further includes: When the superheat of the auxiliary circuit is less than the first superheat, the current opening of the enthalpy electronic expansion valve is reduced according to a preset adjustment frequency and a preset reduction amplitude.

3. The air conditioner control method as described in claim 1, characterized in that, The method further includes: When the superheat of the auxiliary circuit is greater than the second superheat, the current opening of the enthalpy-injected electronic expansion valve is compared with the first opening and the second opening, respectively, and the first opening is less than the second opening; and The current opening degree is adjusted based on the comparison results.

4. The air conditioner control method as described in claim 3, characterized in that, The adjustment of the current opening degree based on the comparison result includes: When the current opening degree is less than the first opening degree, the current opening degree is increased according to a preset adjustment frequency and a first increase. When the current opening degree is between the first opening degree and the second opening degree, the current opening degree is increased according to a preset adjustment frequency and a second increment; and When the current opening degree is greater than the second opening degree, the current opening degree is increased according to a preset adjustment frequency and a third increase, wherein the first increase is greater than the second increase and the second increase is greater than the third increase.

5. The air conditioner control method as described in claim 1, characterized in that, The determination of whether the spray enthalpy function needs to be activated includes: Obtain the current operating frequency of the compressor; If the current operating frequency is less than the preset operating frequency, it is determined that the enthalpy injection function will not be activated. When the current operating frequency is greater than or equal to the preset operating frequency, the current outdoor ambient temperature is obtained; and Determine whether to activate the enthalpy injection function based on the current outdoor ambient temperature.

6. The air conditioner control method as described in claim 5, characterized in that, The step of determining whether to activate the enthalpy spraying function based on the current outdoor ambient temperature includes: When the current outdoor ambient temperature is greater than or equal to the preset temperature, the current compressor discharge temperature is obtained; When the current compressor exhaust temperature is lower than the exhaust temperature threshold, it is determined that the enthalpy injection function will not be activated. When the current compressor exhaust temperature is greater than or equal to the exhaust temperature threshold, the enthalpy injection function is activated. When the current outdoor ambient temperature is lower than the preset temperature, the subcooling degree of the air conditioner is obtained; When the supercooling degree is less than the supercooling threshold, the enthalpy injection function is activated; and When the supercooling degree is greater than or equal to the supercooling threshold, it is determined that the enthalpy injection function will not be activated.

7. An air conditioner control device, characterized in that, The air conditioner includes: an economizer, an electronic expansion valve for enthalpy injection, and an enthalpy injection solenoid valve. The inlet of the economizer is connected to the electronic expansion valve for enthalpy injection, the outlet of the economizer is connected to one end of the solenoid valve for enthalpy injection, and the other end of the solenoid valve for enthalpy injection is connected to the injection port of the compressor. The air conditioner control device includes: The judgment module is used to determine whether the enthalpy injection function needs to be turned on when the air conditioner is in cooling mode. The determination is based on the compressor's operating frequency, outdoor ambient temperature, compressor discharge temperature, and the air conditioner's subcooling degree. The acquisition module is used to activate the enthalpy injection solenoid valve and acquire the auxiliary circuit outlet temperature and auxiliary circuit inlet temperature of the economizer when it is determined that the enthalpy injection function needs to be activated; and The control module is used to control the current opening degree of the enthalpy-injecting electronic expansion valve according to the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature, including: determining whether it is the first time the enthalpy-injecting function is activated; if so, adjusting the current opening degree of the enthalpy-injecting electronic expansion valve to a preset opening degree, and recording the duration for which the current opening degree of the enthalpy-injecting electronic expansion valve is maintained at the preset opening degree; when the duration reaches the preset duration, determining the auxiliary circuit superheat degree according to the auxiliary circuit outlet temperature and the auxiliary circuit inlet temperature; when the auxiliary circuit superheat degree is between a first superheat degree and a second superheat degree, controlling the enthalpy-injecting electronic expansion valve to maintain the current opening degree, wherein the first superheat degree is less than the second superheat degree.

8. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and an air conditioner control program stored in the memory and running on the processor, the air conditioner control program being configured to implement the air conditioner control method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores an air conditioner control program, which, when executed by a processor, implements the air conditioner control method as described in any one of claims 1 to 6.

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