Control method and device of air conditioner and air conditioner

Abstract

The application provides a control method and device of an air conditioner and the air conditioner; the method comprises the following steps: if the outdoor environment temperature meets a preset temperature range, the exhaust temperature is not less than a preset exhaust temperature threshold value, and the duration reaches a second duration, the air conditioner is controlled to perform a high-temperature control action; in the high-temperature control action, the indoor fan is controlled to operate at a low wind speed for a second duration; if the exhaust temperature is not less than the preset exhaust temperature threshold value and the duration reaches the second duration, the second electromagnetic valve is controlled to be closed, the first electromagnetic valve and the electric heating are controlled to be opened and operated until the exhaust temperature is less than the preset exhaust temperature threshold value and the duration reaches the second duration, the second electromagnetic valve is controlled to be opened, the first electromagnetic valve is controlled to be closed, and the electric heating is controlled to stop operating; and the air conditioner is controlled to continue refrigeration operation, so that the high-temperature control action alleviates the frequent shutdown of the air conditioner during high-temperature refrigeration, prolongs the service life of the air conditioner, and improves the air conditioning comfort of the user.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to control methods, devices and air conditioners for air conditioners. Background Technology

[0002] Currently, when an air conditioner is cooling in extremely high outdoor temperatures, the controller's protection mechanism will automatically shut down the system based on the excessively high indoor temperature. However, if the shutdown temperature is low, in some high-temperature environments, this will cause the air conditioner to frequently shut down. This not only easily shortens the overall lifespan of the air conditioner but also causes it to require a longer protection period before it can be turned on normally, thus reducing the user's cooling experience. Therefore, how to control the cooling operation of air conditioners in high-temperature environments to avoid frequent shutdown protection is an urgent problem to be solved. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a control method, device and air conditioner for air conditioners to alleviate the above problems, not only extending the service life of the air conditioner, but also avoiding the problem of the air conditioner being shut down for a long time due to frequent shutdowns and reducing the user's cooling experience, thereby improving the user's air conditioning comfort.

[0004] In a first aspect, embodiments of the present invention provide a control method for an air conditioner. The air conditioner includes a compressor, an indoor fan, a four-way valve, and a condenser. Two parallel branches are provided between the four-way valve and the condenser. One branch is equipped with a first solenoid valve and an electric heater, and the other branch is equipped with a second solenoid valve. The method includes: when the air conditioner is running stably in cooling mode for a first duration, real-time detection of the outdoor ambient temperature and the compressor's exhaust temperature; wherein, during cooling operation, the second solenoid valve is open, and both the first solenoid valve and the electric heater are closed; if the outdoor ambient temperature meets a preset temperature range, and the exhaust temperature is not less than a preset exhaust temperature threshold, and the duration reaches a certain threshold... The system operates for two durations, controlling the air conditioner to perform high-temperature control actions. A preset exhaust temperature threshold is used to characterize the difference between the compressor's maximum exhaust temperature and a preset margin. During the high-temperature control action, the indoor fan is controlled to run at low speed for a second duration, continuously monitoring the exhaust temperature. If the exhaust temperature is not lower than the preset exhaust temperature threshold, and the duration reaches the second duration, the second solenoid valve is closed, and the first solenoid valve and electric heater are turned on, until the exhaust temperature is lower than the preset exhaust temperature threshold, and the duration reaches the second duration. Then, the second solenoid valve is opened, the first solenoid valve is closed, the electric heater stops operating, and the air conditioner continues cooling operation.

[0005] The aforementioned air conditioner control method determines whether to activate the high-temperature control action during air conditioner cooling operation based on the outdoor ambient temperature and exhaust temperature. This high-temperature control action alleviates the frequent shutdowns of the air conditioner during high-temperature cooling, thereby not only extending the service life of the air conditioner but also avoiding the problem of prolonged air conditioner downtime caused by frequent shutdowns, which reduces the user's cooling experience and ultimately improves the user's air conditioning comfort.

[0006] Preferably, the preset temperature range includes a first temperature threshold and a second temperature threshold, and the first temperature threshold is less than the second temperature threshold; the method further includes: if the outdoor ambient temperature is greater than the second temperature threshold and the duration reaches a second duration, then control the second solenoid valve to close, the first solenoid valve and the electric heater to start operating, and when the operating duration reaches a third duration, control the air conditioner to trip.

[0007] Preferably, the above method further includes: when the air conditioner trips, obtaining the oil temperature of the compressor and the trip duration of the air conditioner; if the oil temperature is not greater than a preset oil temperature threshold and the trip duration reaches the fourth duration, controlling the air conditioner to resume cooling operation.

[0008] Preferably, the above method further includes: if the outdoor ambient temperature is less than a first temperature threshold, controlling the air conditioner to continue cooling operation.

[0009] Preferably, the above method further includes: in the high temperature control action, if the exhaust temperature is not less than the preset exhaust temperature threshold and the duration has not reached the second duration, then the indoor fan is controlled to continue to operate at the low speed until the duration reaches the second duration.

[0010] Preferably, the above method further includes: if the air conditioner receives a mode control command, determining whether the second solenoid valve is open and whether the first solenoid valve and the electric heater are both closed; wherein, the mode control command includes: a shutdown control command or a mode switching command; if both are true, controlling the air conditioner to operate according to the mode control command.

[0011] Preferably, the above method further includes: if the second solenoid valve is not open, and / or the first solenoid valve is not closed, and / or the electric heating is not turned off, controlling the second solenoid valve to open, and both the first solenoid valve and the electric heating are turned off, and controlling the air conditioner to operate according to the mode control command.

[0012] Secondly, embodiments of the present invention also provide a control device for an air conditioner, the air conditioner including a compressor, an indoor fan, a four-way valve, and a condenser, wherein two parallel branches are provided between the four-way valve and the condenser, one branch is provided with a first solenoid valve and an electric heater, and the other branch is provided with a second solenoid valve; the device includes:

[0013] The temperature detection module is used to detect the outdoor ambient temperature and the compressor exhaust temperature in real time when the air conditioner is running stably in cooling mode for the first period of time. During cooling operation, the second solenoid valve is open, while the first solenoid valve and the electric heater are closed.

[0014] The temperature judgment module is used to control the air conditioner to perform high-temperature control action if the outdoor ambient temperature meets the preset temperature range, the exhaust temperature is not less than the preset exhaust temperature threshold, and the duration reaches the second duration; wherein, the preset exhaust temperature threshold is used to characterize the difference between the compressor's limit exhaust temperature and the preset margin.

[0015] The action execution module is used to control the indoor fan to run at low speed for a second duration during high-temperature control actions, and continuously monitor the exhaust temperature. If the exhaust temperature is not lower than the preset exhaust temperature threshold and the duration reaches the second duration, the module controls the second solenoid valve to close and controls the first solenoid valve and electric heater to start running until the exhaust temperature is lower than the preset exhaust temperature threshold and the duration reaches the second duration. Then, the module controls the second solenoid valve to open, the first solenoid valve to close, the electric heater to stop running, and the air conditioner to continue cooling.

[0016] Thirdly, embodiments of the present invention also provide an air conditioner, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the control method for the air conditioner described in the first aspect.

[0017] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the air conditioner control method described in the first aspect.

[0018] The embodiments of the present invention bring the following beneficial effects:

[0019] This invention provides a control method, device, and air conditioner for an air conditioner. When the air conditioner is running stably in cooling mode for a first duration, the outdoor ambient temperature and the compressor's exhaust temperature are monitored in real time. If the outdoor ambient temperature meets a preset temperature range, and the exhaust temperature is not less than a preset exhaust temperature threshold, and the duration reaches a second duration, the air conditioner is controlled to perform a high-temperature control action. During the high-temperature control action, the indoor fan is controlled to run at a low speed for a second duration, and the exhaust temperature is continuously monitored. If the exhaust temperature is not less than the preset exhaust temperature threshold, and the duration reaches the second duration, the second solenoid valve is controlled to close, and the first solenoid valve and the electric heater are controlled to start operating until the exhaust temperature is less than the preset exhaust temperature threshold, and the duration reaches the second duration. Then, the second solenoid valve is controlled to open, the first solenoid valve is controlled to close, the electric heater stops operating, and the air conditioner continues to run in cooling mode. The above control method determines whether to activate the high-temperature control action during the cooling operation of the air conditioner based on the outdoor ambient temperature and exhaust temperature. This high-temperature control action alleviates the frequent shutdown of the air conditioner during high-temperature cooling, thereby not only extending the service life of the air conditioner but also avoiding the problem of prolonged air conditioner downtime caused by frequent shutdowns, which reduces the user's cooling experience and ultimately improves the user's air conditioning comfort.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention;

[0024] Figure 2 A flowchart of a control method for an air conditioner provided in an embodiment of the present invention;

[0025] Figure 3 A control flowchart for an air conditioner's execution mode control command provided in an embodiment of the present invention;

[0026] Figure 4 A flowchart of another air conditioner control method provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of a control device for an air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0030] Example 1:

[0031] This invention provides a control method for an air conditioner, wherein, as shown in the embodiments of the present invention... Figure 1 As shown, the air conditioner includes, but is not limited to, a compressor 11, an indoor fan 12, a four-way valve 13, a condenser 14, an evaporator 15, a gas-liquid separator 16, and an outdoor fan 17. In practical applications, the first port of the four-way valve 13 is connected to the compressor 11, the second port of the four-way valve 13 is connected to the evaporator 15, the third port of the four-way valve 13 is connected to the gas-liquid separator 16, and the fourth port of the four-way valve 13 is connected to the condenser 14. A throttling assembly 181 and a filter 182 are also provided between the evaporator 15 and the condenser 14.

[0032] In addition, two parallel branches are provided between the four-way valve 13 and the condenser 14. One branch is provided with a first solenoid valve 191, an electric heater 192 and a diffuser tube 193, and the other branch is provided with a second solenoid valve 194. Furthermore, an outer ring temperature sensor 195 is provided on the condenser 14, and an exhaust temperature sensor 196 is provided at the exhaust port of the compressor 11. The specific structure of the air conditioner can be referred to the existing air conditioner. The embodiments of the present invention will not be described in detail here.

[0033] Based on the above-described air conditioner, embodiments of the present invention provide a control method for the air conditioner, such as... Figure 2 As shown, the method includes the following steps:

[0034] Step S202: When the air conditioner is running stably in cooling mode for a first period of time, the outdoor ambient temperature and the compressor exhaust temperature are monitored in real time; wherein, during cooling operation, the second solenoid valve is open, and the first solenoid valve and the electric heater are both closed.

[0035] Specifically, when the air conditioner is turned on and operates in cooling mode, the second solenoid valve 194 opens, while the first solenoid valve 191 and the electric heater 192 are both closed until the air conditioner operates stably in cooling mode for a first duration t1. Here, the value of t1 ranges from 10 min to 20 min, preferably 10 min. The controller of the air conditioner triggers the outer loop temperature sensor 195 and the exhaust temperature sensor 196 to work, and acquires the outdoor ambient temperature Tw detected in real time by the outer loop temperature sensor 195 and the exhaust temperature Tp detected in real time by the exhaust temperature sensor 196. Here, the outdoor ambient temperature Tw and the exhaust temperature Tp are real-time values, so as to determine in time whether to activate the high-temperature control action during the cooling operation of the air conditioner based on the outdoor ambient temperature Tw and the exhaust temperature Tp, to prevent the air conditioner from frequently shutting down in high-temperature environments, thereby ensuring the user's cooling comfort.

[0036] Step S204: If the outdoor ambient temperature meets the preset temperature range, and the exhaust temperature is not less than the preset exhaust temperature threshold, and the duration reaches the second duration, control the air conditioner to perform high temperature control action.

[0037] After obtaining the outdoor ambient temperature Tw and exhaust temperature Tp in real time, it is necessary to determine whether to activate the high-temperature control action during the air conditioner's cooling operation based on these two temperatures. Specifically, if the outdoor ambient temperature Tw meets the preset temperature range, and the exhaust temperature Tp is not less than the preset exhaust temperature threshold, and the duration reaches the second duration t2 (i.e., within any consecutive t2, the outdoor ambient temperature Tw meets the preset temperature range, and the exhaust temperature Tp is not less than the preset exhaust temperature threshold), then the air conditioner is controlled to perform the high-temperature control action. This prevents the air conditioner from frequently shutting down during cooling operation in high-temperature environments, thus avoiding the problem of prolonged air conditioner shutdown and reduced user cooling experience caused by frequent shutdowns, thereby improving user air conditioning comfort.

[0038] Among them, the preset exhaust temperature threshold is used to characterize the ultimate exhaust temperature T of compressor 11. JX The difference between the preset margin ΔT and the preset exhaust temperature threshold is T. JX -△T; In practical applications, T JX The value range of ΔT is 115℃~120℃, preferably 115℃, and the value range of ΔT is 5℃~10℃, preferably 5℃. Furthermore, the value range of the second duration t2 is 30s~60s, preferably 30s, specifically T... JX The values ​​of ΔT and t2 can be set according to the actual situation.

[0039] In step S206, during the high-temperature control action, the indoor fan is controlled to run at low speed for a second duration, and the exhaust temperature is continuously monitored. If the exhaust temperature is not less than the preset exhaust temperature threshold and the duration reaches the second duration, the second solenoid valve is controlled to close, and the first solenoid valve and electric heater are controlled to start running until the exhaust temperature is less than the preset exhaust temperature threshold and the duration reaches the second duration. Then, the second solenoid valve is controlled to open, the first solenoid valve is controlled to close, the electric heater stops running, and the air conditioner continues to run in cooling mode.

[0040] Specifically, in the high-temperature control operation, when the second solenoid valve 194 is closed and the first solenoid valve 191 and the electric heater 192 are opened, the pressure is increased by the diffuser 193 and the enthalpy is increased by the electric heater 192, so that the refrigerant reaching the condenser 14 is at a higher temperature and pressure, thereby increasing the actual condensing temperature of the condenser 14.

[0041] In addition, by increasing the actual condensing temperature of the condenser 14, the compressor 11 does not need to operate at an excessively high frequency, which relatively reduces the load on the compressor 11. This lowers the discharge temperature and pressure required by the compressor 11, thereby indirectly increasing the cooling limit temperature of the air conditioner by reducing the load on the compressor 11 to achieve the required cooling capacity of the air conditioning system. This avoids frequent shutdowns of the air conditioner under high-temperature cooling conditions and ensures the user's air conditioning comfort.

[0042] For example, if compressor 11 needs to operate at 110Hz to meet the intake pressure and temperature of condenser 14, compressor 11 only needs to operate at 100Hz. For an outdoor ambient temperature of 50℃, compressor 11 operates at 80Hz; for an outdoor ambient temperature of 55℃, compressor 11 needs to operate at 90Hz to meet the air conditioner's capacity requirements (the air conditioner will increase its frequency based on the difference between the outdoor and ambient temperatures). In this embodiment of the invention, during high-temperature control, the second solenoid valve 194 is closed, and the first solenoid valve 191 and electric heater 192 are opened. At this time, the pressure is increased by the diffuser 193, and the enthalpy is increased by the electric heater 192, thereby raising the actual condensing temperature of condenser 14. In this case, compressor 11 only needs to operate at 80Hz to meet the requirements, thus reducing the compressor's load. Specifically, increasing both the condensing temperature and pressure does not cause other problems, because increasing the intake pressure and temperature of condenser 14 is to reduce the load on compressor 11; the overall increase is relatively small.

[0043] In one embodiment, the preset temperature range includes a first temperature threshold and a second temperature threshold, and the first temperature threshold is less than the second temperature threshold; here, the first temperature threshold is preferably 48°C, and the second temperature threshold is preferably 60°C. The specific first temperature threshold and the second temperature threshold can be adaptively adjusted according to the actual situation.

[0044] Specifically, when the outdoor ambient temperature does not meet the preset temperature range [48℃, 60℃], the method also includes the following two scenarios:

[0045] (1) If the outdoor ambient temperature is greater than the second temperature threshold and the duration reaches the second duration, the second solenoid valve is closed, the first solenoid valve and the electric heater are turned on, and when the running time reaches the third duration, the air conditioner is shut down.

[0046] When the outdoor ambient temperature exceeds the second temperature threshold (Tw > 60℃) and remains so for t2, the temperature is determined to be too high, and the air conditioner needs to be shut down for protection. The existing practice is to directly shut down the air conditioner to protect it. However, in this embodiment of the invention, the second solenoid valve 194 is first closed, the first solenoid valve 191 and the electric heater 192 are turned on, and when the running time reaches the third duration t3 (t3 is preferably 5s), the air conditioner is then controlled to trip, thereby buffering the shutdown of the air conditioner to prevent it from shutting down too quickly.

[0047] In addition, the method also includes: when the air conditioner trips, obtaining the oil temperature of the compressor and the trip duration of the air conditioner; if the oil temperature is not greater than the preset oil temperature threshold and the trip duration reaches the fourth duration, controlling the air conditioner to resume cooling operation.

[0048] Specifically, the air conditioner also includes an oil temperature sensor for detecting the oil temperature T. 油温 When the air conditioner shuts down for protection, the controller also obtains the compressor oil temperature T. 油温 And the duration of the air conditioner's shutdown (t) 跳机 When the oil temperature T 油温 ≤Preset oil temperature threshold (preferably 60℃), and t 跳机 When the time interval ≥ 4 (preferably 10 minutes) is reached, the air conditioner resumes cooling operation. The oil temperature sensor can be located inside the compressor or in other locations, depending on the specific situation.

[0049] Therefore, when the outdoor ambient temperature is too high, the air conditioner is controlled to shut down (i.e., trip) for protection. During shutdown, the second solenoid valve 194 is closed, the first solenoid valve 191 and the electric heater 192 are turned on and run, and t3 is run to buffer the shutdown and avoid the shutdown being too fast. After the air conditioner stops, the air conditioner is controlled to resume cooling operation according to the trip duration and oil temperature, which avoids the air conditioner from shutting down for a long time and reducing the user's cooling experience, thereby improving the user's air conditioning comfort.

[0050] (2) If the outdoor ambient temperature is less than the first temperature threshold, control the air conditioner to continue cooling operation.

[0051] Specifically, when the outdoor ambient temperature is less than the first temperature threshold, i.e., Tw < 48℃, it is determined that the outdoor ambient temperature is low and there is no need for high temperature control. Therefore, the air conditioner is controlled to continue cooling to meet the user's cooling needs, thereby ensuring the user's air conditioning comfort.

[0052] Therefore, for the detected outdoor ambient temperature Tw and exhaust temperature Tp, ① if Tw < 48℃, the air conditioner will continue to operate in cooling mode to meet the user's cooling needs; ② if Tw > 60℃, and this temperature remains constant for t2, the air conditioner will trip in a buffer mode, and when T... 油温 ≤60℃, and t 跳机 When the time is ≥10 minutes, the air conditioner is controlled to resume cooling operation, thus not only realizing the air conditioner's trip protection but also ensuring the user's cooling needs; ③ When Tw∈[48℃, 60℃], and Tp≥T JX -△t, and continue for t2, control the air conditioner to enter high temperature control mode to alleviate the frequent shutdown of the air conditioner when cooling at high temperature, avoid the problem of the air conditioner being shut down for a long time due to frequent shutdown and reduce the user's cooling experience, thereby improving the user's air conditioning comfort.

[0053] It should be noted that for cases where Tw < 48℃, since the air conditioner is not in a high-temperature cooling state, it can be directly controlled to continue cooling operation without considering the exhaust temperature Tp. Furthermore, for cases where Tw > 60℃, because the outdoor ambient temperature is too high, the air conditioner needs to be shut down for protection. Considering that the higher Tw is, the higher the exhaust temperature Tp is, Tp must satisfy Tp ≥ T JX -△t, so there is no need to judge Tp at this time.

[0054] In one embodiment, the method further includes: during the high-temperature control action, if the exhaust temperature is not less than a preset exhaust temperature threshold and the duration has not reached a second duration, then the indoor fan is controlled to continue operating at a low fan speed until the duration reaches the second duration. That is, during the high-temperature control action, while the indoor fan is operating at a low fan speed, the exhaust temperature Tp is continuously monitored; if Tp ≥ T...JX -△t, but not for t2, then control the indoor fan to continue running at low speed until the duration reaches the second duration.

[0055] It should be noted that if the indoor fan has high, medium and low speed settings, then during high temperature control, the indoor fan will be controlled to run at the low speed setting. If the indoor fan has multiple speed settings that are adjusted according to a percentage, then when the indoor fan is controlled to run at the low speed setting, it means that the indoor fan is controlled to run at the lowest speed setting corresponding to the smallest percentage.

[0056] In one embodiment, the method further includes: if the air conditioner receives a mode control command, determining whether the second solenoid valve is open and whether both the first solenoid valve and the electric heater are closed; wherein the mode control command includes a shutdown control command or a mode switching command; if both are true, controlling the air conditioner to operate according to the mode control command. Conversely, if the second solenoid valve is not open, and / or the first solenoid valve is not closed, and / or the electric heater is not closed, controlling the second solenoid valve to open, and both the first solenoid valve and the electric heater to close, and controlling the air conditioner to operate according to the mode control command.

[0057] Specifically, such as Figure 3 As shown, during the operation of the air conditioner in high-temperature control mode or cooling mode, if the controller receives a mode control command from the air conditioner remote control or mobile device (such as a mobile phone), this mode control command can be a shutdown control command or a mode switching command. Here, the mode switching command is used to control the air conditioner to switch to other operating modes, such as fan mode. At this time, the controller first determines whether the second solenoid valve 194 is open and whether the first solenoid valve 191 and the electric heater 192 are both closed. If both are open, the controller controls the air conditioner to operate according to the mode control command, such as shutting down or switching to other operating modes. If neither is open, the controller first controls the second solenoid valve 194 to open and the first solenoid valve 191 and the electric heater 192 to close, and then controls the air conditioner to operate according to the mode control command.

[0058] In summary, the air conditioner control method provided in this embodiment of the invention determines whether to activate the high-temperature control action during the air conditioner's cooling operation by detecting the outdoor ambient temperature and exhaust temperature. This high-temperature control action alleviates the frequent shutdown of the air conditioner during high-temperature cooling, thereby not only extending the service life of the air conditioner but also avoiding the problem of prolonged air conditioner shutdown and reduced user cooling experience caused by frequent shutdowns, thus improving the user's air conditioning comfort.

[0059] Example 2:

[0060] Based on the above method embodiments, this invention also provides another control method for an air conditioner, such as... Figure 4As shown, the method includes the following procedures:

[0061] (1) Turn on the air conditioner in cooling mode;

[0062] (2) Set state operation, that is, the air conditioner operates stably in the cooling state;

[0063] (3) After the system has been running stably for t1, the outdoor ambient temperature Tw and the compressor exhaust temperature Tp are continuously monitored during t2; where Tw and Tp are real-time values.

[0064] (4) If Tw∈[48℃, 60℃] and Tp≥T JX -Δt, and continue for t2, then the high temperature control action is initiated; in practical applications, high temperature control is generally not required below 48℃, while above 60℃ it is too severe and generally requires direct shutdown to protect the unit.

[0065] In the high-temperature control action, the indoor fan is reduced to the lowest setting and runs for t2; Tp is continuously monitored, and if Tp ≥ T for t2 consecutive times... JX -△t, then enter (5), if not satisfied, the indoor fan continues to operate at the lowest speed.

[0066] Furthermore, if Tw∈[48℃, 60℃] is not satisfied, and Tp≥T JX -△t, if it lasts for t2, then it is determined whether the outdoor ambient temperature is too high. If it meets the condition Tw>60℃ for t2, then the second solenoid valve is closed, the first solenoid valve and the electric heater are opened, and the air conditioning system runs for 5 seconds before shutting down, so as to prevent the shutdown from being too fast through the shutdown buffer. Also, when the compressor oil temperature is ≤60℃ and the shutdown time is ≥t1, the air conditioner resumes cooling operation and returns to (2). In other cases, the air conditioner is controlled to continue cooling operation.

[0067] (5) Control the second solenoid valve to close, and control the first solenoid valve and electric heater to start operation; if Tp < T JX -△t, maintain t2, then enter (6); otherwise, continue to control the second solenoid valve to close, and control the first solenoid valve and electric heating to run;

[0068] (6) Control the second solenoid valve to open and the first solenoid valve to close, and the electric heating will stop running;

[0069] (7) Control the air conditioner to continue cooling operation and return to (2).

[0070] Therefore, the air conditioner control method provided in this embodiment of the invention determines whether to activate the high-temperature control action during the air conditioner's cooling operation based on the outdoor ambient temperature and exhaust temperature. The high-temperature control action alleviates the frequent shutdown of the air conditioner during high-temperature cooling, thereby not only extending the service life of the air conditioner, but also avoiding the problem of prolonged air conditioner shutdown and reduced user cooling experience caused by frequent shutdowns. This expands the application scenarios of the air conditioner and improves the user's air conditioning comfort.

[0071] Example 3:

[0072] Corresponding to the above method embodiments, this invention also provides a control device for an air conditioner. The air conditioner includes a compressor, an indoor fan, a four-way valve, and a condenser. Two parallel branches are provided between the four-way valve and the condenser. One branch is provided with a first solenoid valve and an electric heater, and the other branch is provided with a second solenoid valve.

[0073] like Figure 5 As shown, the device includes: a temperature detection module 51, a temperature judgment module 52, and an action execution module 53; the functions of each module are as follows:

[0074] Temperature detection module 51 is used to detect the outdoor ambient temperature and the compressor exhaust temperature in real time when the air conditioner is running stably in cooling mode for the first time. During cooling operation, the second solenoid valve is open, while the first solenoid valve and the electric heater are closed.

[0075] The temperature judgment module 52 is used to control the air conditioner to perform a high-temperature control action if the outdoor ambient temperature meets the preset temperature range, the exhaust temperature is not less than the preset exhaust temperature threshold, and the duration reaches the second duration; wherein, the preset exhaust temperature threshold is used to characterize the difference between the compressor's limit exhaust temperature and the preset margin.

[0076] The action execution module 53 is used to control the indoor fan to run at a low speed for a second duration during the high temperature control action, and continuously monitor the exhaust temperature. If the exhaust temperature is not less than the preset exhaust temperature threshold and the duration reaches the second duration, the second solenoid valve is closed, and the first solenoid valve and the electric heater are turned on and running until the exhaust temperature is less than the preset exhaust temperature threshold and the duration reaches the second duration. Then, the second solenoid valve is opened, the first solenoid valve is closed, the electric heater stops running, and the air conditioner continues to run in cooling mode.

[0077] The air conditioner control device provided in this embodiment of the invention determines whether to activate the high-temperature control action during the air conditioner's cooling operation based on the outdoor ambient temperature and exhaust temperature. The high-temperature control action alleviates the frequent shutdown of the air conditioner during high-temperature cooling, thereby not only extending the service life of the air conditioner, but also avoiding the problem of prolonged air conditioner shutdown and reduced user cooling experience caused by frequent shutdowns, thus improving the user's air conditioning comfort.

[0078] Preferably, the preset temperature range includes a first temperature threshold and a second temperature threshold, and the first temperature threshold is less than the second temperature threshold; the device further includes: if the outdoor ambient temperature is greater than the second temperature threshold and the duration reaches a second duration, then controlling the second solenoid valve to close, the first solenoid valve and the electric heater to start operating, and controlling the air conditioner to trip when the operating time reaches a third duration.

[0079] Preferably, the above-mentioned device further includes: when the air conditioner trips, acquiring the oil temperature of the compressor and the trip duration of the air conditioner; if the oil temperature is not greater than a preset oil temperature threshold and the trip duration reaches the fourth duration, controlling the air conditioner to resume cooling operation.

[0080] Preferably, the above-mentioned device further includes: if the outdoor ambient temperature is less than a first temperature threshold, controlling the air conditioner to continue cooling operation.

[0081] Preferably, the above-mentioned device further includes: during the high-temperature control operation, if the exhaust temperature is not less than the preset exhaust temperature threshold and the duration has not reached the second duration, then the indoor fan is controlled to continue operating at a low speed until the duration reaches the second duration.

[0082] Preferably, the above-mentioned device further includes: if the air conditioner receives a mode control command, determining whether the second solenoid valve is open and whether the first solenoid valve and the electric heater are both closed; wherein, the mode control command includes: a shutdown control command or a mode switching command; if both are true, controlling the air conditioner to operate according to the mode control command.

[0083] Preferably, the above-mentioned device further includes: if the second solenoid valve is not open, and / or the first solenoid valve is not closed, and / or the electric heating is not turned off, controlling the second solenoid valve to open, and both the first solenoid valve and the electric heating are turned off, and controlling the air conditioner to operate according to the mode control command.

[0084] The control device for an air conditioner provided in this embodiment of the invention has the same technical features as the control method for an air conditioner provided in the above embodiments, so it can also solve the same technical problems and achieve the same technical effects.

[0085] This invention also provides an air conditioner, including a processor and a memory. The memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the control method of the air conditioner described above.

[0086] This embodiment also provides a machine-readable storage medium storing machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions cause the processor to implement the above-described control method for the air conditioner.

[0087] The air conditioner control method, apparatus, and air conditioner computer program product provided in the embodiments of the present invention include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0088] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0089] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0090] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0091] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0092] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A control method for an air conditioner, the air conditioner comprising a compressor, an indoor fan, a four-way valve, and a condenser, wherein two parallel branches are provided between the four-way valve and the condenser, one branch being provided with a first solenoid valve and an electric heater, and the other branch being provided with a second solenoid valve; characterized in that, The method includes: When the air conditioner is running stably in cooling mode for a first period of time, the outdoor ambient temperature and the exhaust temperature of the compressor are monitored in real time; wherein, during cooling operation, the second solenoid valve is open, and the first solenoid valve and the electric heater are both closed; If the outdoor ambient temperature meets the preset temperature range, and the exhaust temperature is not less than the preset exhaust temperature threshold, and the duration reaches the second duration, the air conditioner is controlled to perform a high temperature control action; wherein, the preset exhaust temperature threshold is used to characterize the difference between the compressor's limit exhaust temperature and the preset margin. In the high-temperature control action, the indoor fan is controlled to run at low speed for the second duration, and the exhaust temperature is continuously monitored. If the exhaust temperature is not less than the preset exhaust temperature threshold and the duration reaches the second duration, the second solenoid valve is controlled to close, and the first solenoid valve and the electric heater are controlled to start running until the exhaust temperature is less than the preset exhaust temperature threshold and the duration reaches the second duration. Then, the second solenoid valve is controlled to open, the first solenoid valve is controlled to close, the electric heater stops running, and the air conditioner is controlled to continue cooling operation.

2. The method according to claim 1, characterized in that, The preset temperature range includes a first temperature threshold and a second temperature threshold, wherein the first temperature threshold is less than the second temperature threshold; the method further includes: If the outdoor ambient temperature is greater than the second temperature threshold and the duration reaches the second duration, the second solenoid valve is controlled to close, the first solenoid valve and the electric heater are turned on, and when the running time reaches the third duration, the air conditioner is controlled to shut down.

3. The method according to claim 2, characterized in that, The method further includes: When the air conditioner trips, the oil temperature of the compressor and the trip duration of the air conditioner are obtained; If the oil temperature is not greater than the preset oil temperature threshold, and the trip duration reaches the fourth duration, control the air conditioner to resume cooling operation.

4. The method according to claim 2, characterized in that, The method further includes: If the outdoor ambient temperature is lower than the first temperature threshold, the air conditioner is controlled to continue cooling operation.

5. The method according to claim 1, characterized in that, The method further includes: In the high-temperature control action, if the exhaust temperature is not less than the preset exhaust temperature threshold and the duration has not reached the second duration, the indoor fan is controlled to continue operating at the low fan speed until the duration reaches the second duration.

6. The method according to claim 1, characterized in that, The method further includes: If the air conditioner receives a mode control command, it determines whether the second solenoid valve is open, and whether the first solenoid valve and the electric heater are both closed; wherein, the mode control command includes: a power-off control command or a mode switching command; If both are true, control the air conditioner to operate according to the mode control command.

7. The method according to claim 6, characterized in that, The method further includes: If the second solenoid valve is not open, and / or the first solenoid valve is not closed, and / or the electric heater is not turned off, the second solenoid valve is controlled to open, and both the first solenoid valve and the electric heater are turned off, and the air conditioner is controlled to operate according to the mode control command.

8. A control device for an air conditioner, the air conditioner comprising a compressor, an indoor fan, a four-way valve, and a condenser, wherein two parallel branches are provided between the four-way valve and the condenser, one branch being provided with a first solenoid valve and an electric heater, and the other branch being provided with a second solenoid valve; characterized in that, The device includes: The temperature detection module is used to detect the outdoor ambient temperature and the exhaust temperature of the compressor in real time when the air conditioner is running stably in cooling mode for a first period of time; wherein, during cooling operation, the second solenoid valve is open, and the first solenoid valve and the electric heater are both closed; The temperature judgment module is used to control the air conditioner to perform a high-temperature control action if the outdoor ambient temperature meets the preset temperature range, the exhaust temperature is not less than the preset exhaust temperature threshold, and the duration reaches a second duration; wherein, the preset exhaust temperature threshold is used to characterize the difference between the compressor's limit exhaust temperature and the preset margin. The action execution module is used to control the indoor fan to run at a low speed for the second duration during the high temperature control action, and continuously monitor the exhaust temperature. If the exhaust temperature is not less than the preset exhaust temperature threshold and the duration reaches the second duration, the module controls the second solenoid valve to close and controls the first solenoid valve and the electric heater to start running until the exhaust temperature is less than the preset exhaust temperature threshold and the duration reaches the second duration. Then, the module controls the second solenoid valve to open, the first solenoid valve to close, the electric heater to stop running, and the air conditioner to continue cooling operation.

9. An air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the control method for the air conditioner according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, performs the steps of the control method for the air conditioner according to any one of claims 1-7.

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