CN110375411B - Air conditioner starting control method, air conditioner and storage medium - Google Patents
Air conditioner starting control method, air conditioner and storage medium Download PDFInfo
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- CN110375411B CN110375411B CN201910647875.3A CN201910647875A CN110375411B CN 110375411 B CN110375411 B CN 110375411B CN 201910647875 A CN201910647875 A CN 201910647875A CN 110375411 B CN110375411 B CN 110375411B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention discloses an air conditioner starting control method, an air conditioner and a storage medium, wherein the method comprises the following steps: acquiring a first environment temperature, a second environment temperature, a compressor exhaust temperature and a set temperature input by a user; and operating a preset three-stage low-temperature starting mode according to the first environment temperature, the second environment temperature, the exhaust temperature of the compressor and the set temperature so as to accelerate the return of the refrigeration oil to the compressor and/or reduce the outflow of the refrigeration oil from the compressor. Under the condition that the air conditioner is started at a low temperature, the refrigerating oil in the unit is effectively returned to the compressor through the mode, and therefore the running reliability of the air conditioner is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner starting control method, an air conditioner and a storage medium.
Background
With the progress of air conditioning technology, people pay more attention to household central air conditioners day by day, and a multi-connected air conditioner is taken as one of the central air conditioners and brings the public sight.
The multi-connected air conditioner has low energy consumption in operation, has a unique enhanced vapor injection technology, and is free in combination arrangement; therefore, compared with the traditional central air conditioner, the multi-connected air conditioner has the advantages of lower operation cost, higher operation reliability and easier installation. For the above reasons, more and more users prefer the multi-connected air conditioner.
However, the viscosity of the refrigerant oil is reduced in the low temperature environment, so when the multi-split air conditioner is started in the low temperature environment, the refrigerant oil in the unit is more easily discharged together with the gaseous refrigerant, which easily causes the oil shortage of the compressor, and in the severe cases, even causes the burning of the compressor.
Disclosure of Invention
The invention mainly aims to provide an air conditioner starting control method, an air conditioner and a storage medium, and aims to solve the technical problem that a compressor is short of refrigeration oil when the air conditioner is started at a low temperature.
In order to achieve the purpose, the invention provides an air conditioner starting control method, which comprises the following steps:
acquiring an ambient temperature, a set temperature and a compressor exhaust temperature;
and operating a preset low-temperature starting mode according to the environment temperature, the exhaust temperature of the compressor and the set temperature so as to accelerate the return of the refrigeration oil to the compressor and/or reduce the outflow of the refrigeration oil from the compressor.
Optionally, the three-stage cold start mode includes one or more of a first stage cold start mode, a second stage cold start mode, and a third stage cold start mode, and the ambient temperature includes a first ambient temperature and a second ambient temperature:
the step of operating a preset three-level low-temperature start mode according to the ambient temperature, the set temperature and the compressor discharge temperature comprises:
when the first environment temperature and the compressor exhaust temperature meet a first preset condition, operating the first-stage low-temperature starting mode for starting a throttle switch additionally arranged in a backflow auxiliary path;
when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition, operating the second-stage low-temperature starting mode for adjusting the opening degree of the electronic expansion valve of the indoor unit;
and determining a target operation frequency of the compressor from a plurality of preset target operation frequencies according to the set temperature and the second environment temperature, and operating the third-stage low-temperature starting mode for controlling the frequency increase of the compressor when the target operation frequency and the first environment temperature meet a third preset condition.
Optionally, when the first ambient temperature and the compressor discharge temperature satisfy a first preset condition, the step of operating the first-stage low-temperature start mode for turning on a throttle switch additionally arranged in a return auxiliary circuit includes:
when the first environment temperature and the compressor exhaust temperature are both smaller than a first preset temperature, determining that the first environment temperature and the compressor exhaust temperature meet a first preset condition, and controlling the throttle switch to be opened for a preset throttling duration.
Optionally, when the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition, the step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit includes:
obtaining a capacity requirement according to the difference value between the set temperature and the second ambient temperature;
and when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition according to the capacity requirement and the first environment temperature, operating the second-stage low-temperature starting mode for adjusting the opening degree of the electronic expansion valve of the indoor unit.
Optionally, when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition according to the capacity requirement and the first ambient temperature, the step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit includes:
when the capacity requirement is larger than 0, judging whether the first environment temperature is larger than a second preset temperature or not;
if the first environment temperature is less than or equal to a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a first preset opening;
and if the first environment temperature is higher than a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a second preset opening, wherein the second preset opening is smaller than the first preset opening.
Optionally, when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition according to the capacity requirement and the first ambient temperature, the step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit includes:
when the capacity requirement is less than or equal to 0, judging whether the first environment temperature is greater than a second preset temperature;
if the first environmental temperature is less than or equal to a second preset temperature, adjusting the electronic expansion valve of the indoor unit to open a preset conduction time at a third preset opening degree;
and if the first environment temperature is higher than the second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a fourth preset opening, wherein the fourth preset opening is smaller than the third preset opening.
Optionally, when the target operating frequency and the first ambient temperature satisfy a third preset condition, the step of operating the third-stage cold start mode for controlling the compressor frequency increase includes:
when the target operation frequency is greater than a first preset frequency and the first environment temperature is less than the first preset temperature, determining that the target operation frequency and the first environment temperature meet a third preset condition, controlling a compressor to operate at the first preset frequency for a first time period, then increasing the frequency, and detecting the frequency of the increased compressor in real time;
when the frequency of the compressor after the frequency increase is detected to be a second preset frequency, controlling the compressor to operate for a second time at the second preset frequency and then increasing the frequency, and returning to the step: detecting the frequency of the compressor after the frequency boosting in real time, wherein the second preset frequency is greater than the first preset frequency;
when the frequency of the compressor after the frequency increase is detected to be a third preset frequency, controlling the compressor to operate for a third time at the third preset frequency and then increasing the frequency, and returning to the step: detecting the frequency of the compressor after the frequency rise in real time, wherein the third preset frequency is greater than the second preset frequency;
when the frequency of the compressor after the frequency increase is detected to be a fourth preset frequency, controlling the compressor to operate for a fourth time at the fourth preset frequency and then increasing the frequency, and returning to the step: and detecting the frequency of the boosted compressor in real time, wherein the fourth preset frequency is greater than the third preset frequency.
Optionally, the air conditioner further comprises a pressure sensor, and the following steps are performed while the step of operating the third-stage low-temperature start mode for controlling the compressor frequency raising is executed:
detecting the exhaust pressure and the suction pressure of the compressor through a pressure sensor;
when the exhaust pressure is greater than the first preset pressure or the exhaust temperature of the compressor is greater than a third preset temperature, the third-stage low-temperature starting mode is exited, and the frequency of the compressor is reduced;
when the suction pressure is less than or equal to a second preset pressure, exiting the third-stage low-temperature starting mode, prohibiting the compressor from increasing the frequency, and monitoring the suction pressure of the compressor in real time, wherein the second preset pressure is lower than the first preset pressure;
and when the monitored suction pressure is less than a third preset pressure, controlling the compressor to reduce a preset frequency value at preset time intervals until the suction pressure is less than or equal to a second preset pressure, wherein the third preset pressure is lower than the second preset pressure.
Further, to achieve the above object, the present invention also provides an air conditioner including: the air conditioner starting control method comprises a memory, a processor and an air conditioner starting control program which is stored on the memory and can run on the processor, wherein the air conditioner starting control program realizes the steps of the air conditioner starting control method when being executed by the processor.
Further, to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon an air conditioner start-up control program, which when executed by a processor, implements the steps of the air conditioner start-up control method as described above.
The invention provides an air conditioner starting control method, an air conditioner and a storage medium, wherein the method comprises the steps of obtaining an ambient temperature, a set temperature and a compressor exhaust temperature; and operating a preset low-temperature starting mode according to the environment temperature, the exhaust temperature of the compressor and the set temperature so as to accelerate the return of the refrigeration oil to the compressor and/or reduce the outflow of the refrigeration oil from the compressor. Wherein set up tertiary low temperature starting mode, can accelerate cooling oil return to the compressor, and/or reduce the cooling oil and flow out from the compressor, consequently make the effectual oil return of the refrigeration oil in the unit to the compressor from source and feedback both ends to avoid causing the compressor to lack oil.
Drawings
FIG. 1 is a schematic diagram of an air conditioning architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an embodiment of a method for controlling the start-up of an air conditioner according to the present invention;
FIG. 3 is a schematic structural diagram of a multi-connected air conditioning system according to the present invention;
fig. 4 is a detailed schematic view of the process of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy the second preset condition according to the capacity requirement and the first ambient temperature;
fig. 5 is a flowchart illustrating a further step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy the second preset condition according to the capacity requirement and the first ambient temperature.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the invention is an air conditioner which can be a multi-connected air conditioner and other terminal equipment with a storage function.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Wi-Fi module, and the like, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 mainly includes an input unit such as a keyboard including a wireless keyboard and a wired keyboard, and is used to connect to the client and perform data communication with the client; and the processor 1001 may be configured to call the air conditioner start-up control program stored in the memory 1005, and perform the following operations:
acquiring an ambient temperature, a set temperature and a compressor exhaust temperature;
and operating a preset low-temperature starting mode according to the environment temperature, the exhaust temperature of the compressor and the set temperature so as to accelerate the return of the refrigeration oil to the compressor and/or reduce the outflow of the refrigeration oil from the compressor.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
when the first environment temperature and the compressor exhaust temperature meet a first preset condition, operating the first-stage low-temperature starting mode for starting a throttle switch additionally arranged in a backflow auxiliary path;
when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition, operating the second-stage low-temperature starting mode for adjusting the opening degree of the electronic expansion valve of the indoor unit;
and determining a target operation frequency of the compressor from a plurality of preset target operation frequencies according to the set temperature and the second environment temperature, and operating the third-stage low-temperature starting mode for controlling the frequency increase of the compressor when the target operation frequency and the first environment temperature meet a third preset condition.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
when the first environment temperature and the compressor exhaust temperature are both smaller than a first preset temperature, determining that the first environment temperature and the compressor exhaust temperature meet a first preset condition, and controlling the throttle switch to be opened for a preset throttling duration.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
obtaining a capacity requirement according to the difference value between the set temperature and the second ambient temperature;
and when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition according to the capacity requirement and the first environment temperature, operating the second-stage low-temperature starting mode for adjusting the opening degree of the electronic expansion valve of the indoor unit.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
when the capacity requirement is larger than 0, judging whether the first environment temperature is larger than a second preset temperature or not;
if the first environment temperature is less than or equal to a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a first preset opening;
and if the first environment temperature is higher than a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a second preset opening, wherein the second preset opening is smaller than the first preset opening.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
when the capacity requirement is less than or equal to 0, judging whether the first environment temperature is greater than a second preset temperature;
if the first environmental temperature is less than or equal to a second preset temperature, adjusting the electronic expansion valve of the indoor unit to open a preset conduction time at a third preset opening degree;
and if the first environment temperature is higher than the second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a fourth preset opening, wherein the fourth preset opening is smaller than the third preset opening.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
when the target operation frequency is greater than a first preset frequency and the first environment temperature is less than the first preset temperature, determining that the target operation frequency and the first environment temperature meet a third preset condition, controlling a compressor to operate at the first preset frequency for a first time period, then increasing the frequency, and detecting the frequency of the increased compressor in real time;
when the frequency of the compressor after the frequency increase is detected to be a second preset frequency, controlling the compressor to operate for a second time at the second preset frequency and then increasing the frequency, and returning to the step: detecting the frequency of the compressor after the frequency boosting in real time, wherein the second preset frequency is greater than the first preset frequency;
when the frequency of the compressor after the frequency increase is detected to be a third preset frequency, controlling the compressor to operate for a third time at the third preset frequency and then increasing the frequency, and returning to the step: detecting the frequency of the compressor after the frequency rise in real time, wherein the third preset frequency is greater than the second preset frequency;
when the frequency of the compressor after the frequency increase is detected to be a fourth preset frequency, controlling the compressor to operate for a fourth time at the fourth preset frequency and then increasing the frequency, and returning to the step: and detecting the frequency of the boosted compressor in real time, wherein the fourth preset frequency is greater than the third preset frequency.
Further, the processor 1001 may call the air conditioner start control program stored in the memory 1005, and also perform the following operations:
detecting the exhaust pressure and the suction pressure of the compressor through a pressure sensor;
when the exhaust pressure is greater than the first preset pressure or the exhaust temperature of the compressor is greater than a third preset temperature, the third-stage low-temperature starting mode is exited, and the frequency of the compressor is reduced;
when the suction pressure is less than or equal to a second preset pressure, exiting the third-stage low-temperature starting mode, prohibiting the compressor from increasing the frequency, and monitoring the suction pressure of the compressor in real time, wherein the second preset pressure is lower than the first preset pressure;
and when the monitored suction pressure is less than a third preset pressure, controlling the compressor to reduce a preset frequency value at preset time intervals until the suction pressure is less than or equal to a second preset pressure, wherein the third preset pressure is lower than the second preset pressure.
The specific embodiment of the air conditioner is basically the same as the embodiments of the air conditioner starting control method described below, and the details are not described herein.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of an air conditioner start control method according to the present invention, and the air conditioner start control method provided in this embodiment includes the following steps:
step S10, obtaining the environment temperature, the setting temperature and the compressor exhaust temperature;
for the purpose of elaborating the scheme, the method is applied to a multi-connected air conditioner and the multi-connected air conditioner operates in a heating mode. The multi-split air conditioner according to the present embodiment has a structure as shown in fig. 3, and includes a compressor 1, an oil separator 2, a four-way valve 3, a steam pipe stop valve 4, an indoor unit 5, a liquid pipe stop valve 6, an outdoor conducting part 7, an outdoor unit heat exchanger 8, a gas-liquid separator 9, a capillary tube 10, a throttling part 11, a main capillary tube 12, an indoor unit capillary tube 13, and an indoor unit electronic expansion valve 14. Wherein, an outlet of an oil return pipe of the oil separator 2 is connected with an oil return flow path, and a first port a is formed at the connection part; the oil return flow path is divided into two parts at the second port b to form a main return path and an auxiliary return path; the oil return main path comprises a filter and a main path capillary tube 12, is connected with the air suction pipe of the compressor, and forms a third port c at the connection part; the oil return auxiliary path comprises a filter and auxiliary path capillary tube 10 and a throttling part 11, and is connected with the compressor air suction pipe, and a fourth port d is formed at the connection position.
In this embodiment, a temperature sensor is preset, and preferably, the temperature sensor can measure at least an indoor ambient temperature, i.e., a temperature of an environment where the indoor unit is located, an outdoor ambient temperature, i.e., a temperature of an environment where the outdoor unit is located, and a compressor discharge temperature of the compressor, and acquire a set temperature thereof according to an operation of a user.
And step S20, operating a preset low-temperature starting mode according to the environment temperature, the exhaust temperature of the compressor and the set temperature, so that the frozen oil is returned to the compressor in an accelerating way and/or the outflow of the frozen oil is reduced by the compressor.
In this embodiment, three-stage low-temperature start modes are preset, and the three-stage low-temperature start modes are first-stage low-temperature start modes respectively used for starting a throttle switch additionally arranged in a backflow auxiliary circuit; a second-stage low-temperature starting mode for adjusting the opening of the electronic expansion valve of the indoor unit; a third stage cold start mode for controlling compressor up-conversion. Different low-temperature starting modes are operated according to the ambient temperature, the exhaust temperature of the compressor and the set temperature, so that the refrigerating oil is returned to the compressor in an accelerating mode and/or the outflow of the refrigerating oil of the compressor is reduced.
The embodiment provides an air conditioner starting control method, which comprises the steps of obtaining an ambient temperature, a compressor exhaust temperature and a set temperature; and operating a preset low-temperature starting mode according to the ambient temperature, the exhaust temperature of the compressor and the set temperature so as to return the refrigeration oil to the compressor. Under the condition of low-temperature starting of the air conditioner, the oil return of the cooling oil to the compressor can be accelerated and/or the outflow of the cooling oil from the compressor is reduced by a preset three-stage low-temperature starting mode, so that the refrigerating oil in the unit can be effectively returned to the compressor, and the running reliability of the air conditioner is improved.
Further, the low-temperature start mode comprises one or more of a first stage low-temperature start mode, a second stage low-temperature start mode and a third stage low-temperature start mode, and the ambient temperature comprises a first ambient temperature and a second ambient temperature:
the step of operating a preset three-level low-temperature starting mode according to the first ambient temperature, the second ambient temperature, the compressor exhaust temperature and the set temperature comprises the following steps of:
step S21, when the first ambient temperature and the compressor discharge temperature satisfy a first preset condition, operating the first-stage low-temperature start mode for turning on a throttle switch additionally provided in a return flow auxiliary path;
step S22, when the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition, operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit;
step S23, determining a target operating frequency of the compressor from a plurality of preset target operating frequencies according to the set temperature and the second ambient temperature, and operating the third-stage low-temperature start mode for controlling the frequency increase of the compressor when the target operating frequency and the first ambient temperature satisfy a third preset condition.
It should be understood that the first ambient temperature in this embodiment is the outdoor ambient temperature and the second ambient temperature is the indoor ambient temperature. After the air conditioner is started, when a first environment temperature and the exhaust temperature of the compressor meet a first preset condition, a first-stage low-temperature starting mode is operated, specifically, the first-stage low-temperature starting mode is mainly used for accelerating oil return of the compressor in a mode of opening a newly-added throttle switch in a backflow auxiliary circuit.
After the air conditioner is started, the set temperature input by a user through a remote controller or other remote control equipment is obtained, and when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition, a second-stage low-temperature starting mode is operated, specifically, the second-stage low-temperature starting mode is mainly used for accelerating oil return of the compressor in a mode of adjusting the opening degree of an electronic expansion valve of the indoor unit. It should be understood that, as can be seen from fig. 3, the opening degree of the electronic expansion valve of the indoor unit affects the oil return of the compressor, and as the opening degree of the electronic expansion valve of the indoor unit increases, the higher the flow rate of the refrigerant, the larger the opening degree of the electronic expansion valve of the indoor unit is, the more favorable the oil return of the system is because the refrigerant is easy to dissolve together; when the opening degree of the electronic expansion valve of the indoor unit is too small, the flow rate of the refrigerant is too low, and the refrigerant and the refrigeration oil are accumulated in the heat exchanger of the indoor unit, which is very unfavorable for oil return of the system.
In this embodiment, a plurality of preset target operating frequencies are preset, after the set temperature input by the user is obtained, the target operating frequency of the compressor is determined according to the set temperature and the second ambient temperature, and then the frequency of the compressor is controlled to be increased according to the target operating frequency and the first ambient temperature, so that the discharge of the refrigerant oil is reduced on the premise that the compressor has an expected heating effect.
Further, when the first ambient temperature and the compressor discharge temperature satisfy a first preset condition, the step of operating the first-stage low-temperature start mode for turning on a throttle switch additionally arranged in a return auxiliary circuit includes:
step S211, when the first environment temperature and the compressor exhaust temperature are both smaller than a first preset temperature, determining that the first environment temperature and the compressor exhaust temperature meet a first preset condition, and controlling the throttle switch to be turned on for a preset throttle duration.
The oil return flow path in this embodiment includes an oil return main path and an oil return auxiliary path, and after the air conditioner is turned on, the oil return main path is always kept in a conduction state, and when the throttling component is turned on, the oil return auxiliary path is controlled to be turned on, and when the throttling component is turned off, the oil return auxiliary path is controlled to be turned off.
The first ambient temperature is detected by a temperature sensor on the outdoor unit, and the discharge temperature of the compressor is detected by a temperature sensor installed on the compressor. After the air conditioning system is started, when the first environment temperature and the compressor exhaust temperature are both less than a first preset temperature, it is indicated that the compressor may be in a just-started state at this time, or in other states requiring high-intensity work, as the work intensity increases, the oil discharge amount of the compressor also increases, at this time, the throttle component is controlled to be started for a preset throttle duration, preferably, the preset throttle duration is 10 minutes, that is, under the condition that the first environment temperature and the compressor exhaust temperature are both less than the first preset temperature, the oil return auxiliary circuit is turned off after being turned on for 10 minutes. In addition, when the first environment temperature and/or the exhaust temperature of the compressor is greater than or equal to the first preset temperature, the throttling component is controlled to be closed, so that in the air conditioning system, the refrigeration oil intelligently flows back to the compressor through the oil return main circuit.
According to the embodiment, the conduction of the throttling part is controlled through the first environment temperature detected by the temperature sensor and the exhaust temperature of the compressor, so that the refrigeration oil separated from the oil separator returns to the compressor, and the phenomenon of oil shortage of the compressor caused by the fact that the oil discharge amount of the compressor is greater than the oil return amount is avoided.
Further, when the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition, the step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit includes:
step S221, obtaining a capacity requirement according to a difference value between the set temperature and the second ambient temperature;
step S222, when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition according to the capacity requirement and the first ambient temperature, operating the second-stage low-temperature start mode for adjusting an opening degree of an electronic expansion valve of an indoor unit.
It should be understood that the capacity requirement in this embodiment is a capacity requirement of the air conditioning indoor unit, and the capacity requirement of the air conditioning indoor unit is obtained according to the current working mode of the air conditioner after the set temperature input by the user and the second ambient temperature detected by the temperature sensor are obtained. For the air conditioner in the refrigeration mode, if the second environment temperature is higher than the set temperature, the capacity requirement is higher than 0, and if the second environment temperature is lower than the set temperature, the capacity requirement is lower than 0; for the air conditioner in the heating mode, if the second ambient temperature is greater than the set temperature, the capacity requirement is less than 0, and if the second ambient temperature is less than the set temperature, the capacity requirement is greater than 0. After the capacity requirement is obtained, when the set temperature, the second environment temperature and the first environment temperature are determined to meet a second preset condition according to the determined capacity requirement and the first environment temperature, a preset second-stage low-temperature starting mode is operated, and the opening degree of a conducting part is reasonably controlled, so that the refrigeration oil circulation of the air conditioning system is controlled, and the oil shortage phenomenon of the compressor is avoided.
Further, referring to fig. 4, fig. 4 is a flowchart illustrating a step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition according to the capacity requirement and the first ambient temperature, and the step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy the second preset condition according to the capacity requirement and the first ambient temperature includes:
step S2221, when the capacity requirement is greater than 0, judging whether the first environment temperature is greater than a second preset temperature;
step S2222, if the first environment temperature is less than or equal to a second preset temperature, adjusting the minimum opening degree of the electronic expansion valve of the indoor unit to a first preset opening degree;
step S2223, if the first ambient temperature is greater than a second preset temperature, adjusting the minimum opening degree of the electronic expansion valve of the indoor unit to a second preset opening degree, wherein the second preset opening degree is smaller than the first preset opening degree.
Further, referring to fig. 5, fig. 5 is a flowchart illustrating a step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition according to the capacity requirement and the first ambient temperature, and the step of operating the second-stage low-temperature start mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy the second preset condition according to the capacity requirement and the first ambient temperature includes:
step S2224, when the capacity requirement is less than or equal to 0, judging whether the first environment temperature is greater than a second preset temperature;
step S2225, if the first environment temperature is less than or equal to a second preset temperature, adjusting the electronic expansion valve of the indoor unit to open for a preset conduction time at a third preset opening degree;
step S2226, if the first ambient temperature is greater than the second preset temperature, adjusting the minimum opening degree of the electronic expansion valve of the indoor unit to a fourth preset opening degree, wherein the fourth preset opening degree is less than the third preset opening degree.
It should be understood that, in a multi-connected air conditioning system, including a set of outdoor units and a plurality of sets of indoor units, the capacity requirement of the outdoor unit is equal to the sum of the capacity requirements of all the indoor units, when the capacity requirement of the outdoor unit is greater than 0, the outdoor unit is opened, but there is inevitably a case that the capacity requirement of the outdoor unit is greater than 0 and is in an open state, and some of the indoor units are in a closed state when the capacity requirement of some indoor units is less than 0, that is, during the operation of the multi-connected air conditioning system, even if the outdoor unit is in an open state, there may be an.
In this embodiment, the second temperature is preset, and when the capacity requirement of the air conditioning indoor unit is greater than 0, it indicates that the current indoor unit is turned on, and the first ambient temperature and the second preset temperature are determined. If the first environment temperature is less than or equal to a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a first preset opening; and if the first environment temperature is higher than a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a second preset opening, wherein the second preset opening is smaller than the first preset opening, preferably, the second preset temperature is-12 degrees, the first preset opening is 300pls, and the second preset opening is 140 pls. It is easy to find that the lower the first environment temperature is, the more the refrigerating oil is discharged from the compressor, and in order to prevent the oil shortage, the opening degree of the electronic expansion valve of the indoor unit is adjusted to be high, so as to facilitate the oil return of the compressor.
When the capacity requirement of the indoor unit of the air conditioner is less than or equal to 0, the outdoor unit and the whole air conditioning system are in working states at the moment, but the indoor unit of the air conditioner is not opened currently, and if the first environmental temperature is less than or equal to a second preset temperature, the electronic expansion valve of the indoor unit is adjusted to be opened for a preset conduction time at a third preset opening degree; and if the first environment temperature is higher than the second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to a fourth preset opening, wherein the fourth preset opening is smaller than a third preset opening, preferably, the preset conduction time is 8 minutes, the third preset opening is 220pls, and the fourth preset opening is 60 pls.
In the embodiment, through the mode, the minimum opening degree of the electronic expansion valve of the indoor unit is set according to the actual working condition of the indoor unit of the air conditioner, so that the circulation quantity of the refrigerant is ensured, the refrigerant and the refrigeration oil accumulated in the heat exchanger of the indoor unit are circulated, and the oil shortage of the compressor in a low-temperature starting state is avoided.
Further, the step of operating the third-stage cold start mode for controlling the compressor boost frequency when the target operating frequency and the first ambient temperature satisfy a third preset condition includes:
step S231, when the target operation frequency is greater than a first preset frequency and the first environment temperature is less than the first preset temperature, determining that the target operation frequency and the first environment temperature meet a third preset condition, controlling the compressor to operate at the first preset frequency for a first time period, then increasing the frequency, and detecting the frequency of the compressor after increasing the frequency in real time;
step S232, when it is detected that the frequency of the compressor after frequency boosting is the second preset frequency, controlling the compressor to operate at the second preset frequency for the second duration and then frequency boosting, and returning to the step: detecting the frequency of the compressor after the frequency boosting in real time, wherein the second preset frequency is greater than the first preset frequency;
step S233, when detecting that the frequency of the compressor after frequency boosting is the third preset frequency, controlling the compressor to operate at the third preset frequency for the third duration and then frequency boosting, and returning to the step: detecting the frequency of the compressor after the frequency rise in real time, wherein the third preset frequency is greater than the second preset frequency;
step S234, when the frequency of the compressor is detected to be a fourth preset frequency after the frequency boost, controlling the compressor to operate at the fourth preset frequency for a fourth duration and then boost the frequency, and returning to the step: and detecting the frequency of the boosted compressor in real time, wherein the fourth preset frequency is greater than the third preset frequency.
Further, the step of operating the third stage cold start mode for controlling compressor up-conversion is performed simultaneously with the steps of:
step S24, detecting the discharge pressure and the suction pressure of the compressor through a pressure sensor;
step S25, when the exhaust pressure is higher than the first preset pressure or the exhaust temperature of the compressor is higher than the third preset temperature, the third-stage low-temperature starting mode is exited, and the frequency of the compressor is reduced;
step S26, when the suction pressure is less than or equal to a second preset pressure, exiting the third-stage low-temperature starting mode, prohibiting the compressor from raising the frequency, and monitoring the suction pressure of the compressor in real time, wherein the second preset pressure is lower than the first preset pressure;
and step S27, when the monitored suction pressure is less than a third preset pressure, controlling the compressor to reduce a preset frequency value at intervals of preset time until the suction pressure is less than or equal to the second preset pressure, wherein the third preset pressure is lower than the second preset pressure.
In this embodiment, a first frequency is preset, and after the target operating frequency of the compressor is obtained, if the target operating frequency is greater than the first preset frequency and the first ambient temperature is less than the first preset temperature, the compressor is controlled to increase the frequency according to the following logic:
in the frequency boosting process of the compressor, when the frequency of the compressor reaches a first preset frequency, controlling the compressor to operate at the first preset frequency for a first time period and then boosting the frequency; when the frequency of the compressor after the frequency increase reaches a second preset frequency, controlling the compressor to operate at the second preset frequency for a second time period and then increasing the frequency; when the frequency of the compressor after the frequency increase reaches a third preset frequency, controlling the compressor to operate at the third preset frequency for a third time period and then increasing the frequency; when the frequency of the compressor after frequency boosting reaches a fourth preset frequency, the compressor is controlled to operate at the fourth preset frequency for a fourth time period and then frequency boosting is performed, and it is easy to understand that the fourth preset frequency is greater than the third preset frequency, the third preset frequency is greater than the second preset frequency, and the second preset frequency is greater than the first preset frequency. As a preferred embodiment, the first preset frequency is set to be 50rps (revaluations per second), the second preset frequency is 60rps, the third preset frequency is 70rps, and the fourth preset frequency is 80rps, and accordingly, the first preset time period is preferably 1 minute, the second preset time period is preferably 2 minutes, the third preset time period is preferably 3 minutes, and the fourth preset time period is preferably 4 minutes. Particularly, in order to achieve better oil return effect, the frequency increasing speed of the compressor is controlled to be less than 2rps per second in the frequency increasing process of the compressor.
In the frequency rising process of the compressor, if the frequency rising of the compressor is too fast, the oil discharge amount of the compressor is easily larger than the oil return amount, and the oil shortage of the compressor is caused; if the frequency of the compressor is too low, a good heating effect cannot be achieved. The embodiment controls the frequency increasing amplitude of each stage of the compressor, so that the compressor controls the circulation of the refrigeration oil on the premise of meeting the expected heating effect, and the oil shortage of the compressor is avoided.
Referring to fig. 3, in the present embodiment, a suction pressure sensor is disposed in a pipeline between the gas-liquid separator 9 and the four-way valve 3, and the suction pressure sensor is used for detecting a suction pressure of the compressor, that is, a system low pressure; a discharge pressure sensor for detecting a discharge pressure of the compressor, that is, a system high pressure is provided in a pipe between the oil separator 2 and the four-way valve 3.
And when the discharge pressure is greater than the first preset pressure, preferably the first preset pressure is 3Mpa, or the compressor discharge temperature of the compressor is greater than the third preset temperature, preferably the third preset temperature is 100 ℃, controlling the compressor to exit the third-stage low-temperature starting mode.
When the suction pressure is less than or equal to a second preset pressure, forbidding the compressor to increase the frequency, and monitoring the suction pressure of the compressor in real time, wherein the second preset pressure is lower than the first preset pressure; when the suction pressure is lower than the third preset pressure, the compressor is controlled to reduce the frequency at a preset frequency reduction frequency, preferably, the compressor is controlled to reduce the frequency by 5rps every 40 seconds, it is easily understood that the second preset pressure should be lower than the first preset pressure, optionally, the first preset pressure is 0.12Mpa (megaPascals) and the second preset pressure is 0.08Mpa, during the compressor frequency reduction process at the preset frequency reduction frequency, the suction pressure of the compressor is monitored in real time, and the compressor is prohibited from reducing the frequency until the suction pressure is less than or equal to the second preset pressure. The actual running frequency of the compressor is reasonably controlled, so that the phenomenon that the refrigerant oil cannot return to an outdoor unit in time after being discharged to cause oil shortage of the compressor is avoided.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where an air conditioner start control program is stored on the computer-readable storage medium, and when the air conditioner start control program is executed by a processor, the air conditioner start control program implements the operation of the air conditioner start control method as described above.
The specific embodiment of the computer-readable storage medium of the present invention is substantially the same as the embodiments of the air conditioner start control method described above, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An air conditioner starting control method is characterized by comprising the following steps:
acquiring an ambient temperature, a set temperature and a compressor exhaust temperature;
the ambient temperature comprises a first ambient temperature and a second ambient temperature;
the step of operating a preset low temperature start mode according to the ambient temperature, the set temperature and the compressor discharge temperature comprises:
when the first environment temperature and the compressor exhaust temperature meet a first preset condition, operating a first-stage low-temperature starting mode for starting a throttle switch additionally arranged in a backflow auxiliary path;
when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition, operating a second-stage low-temperature starting mode for adjusting the opening degree of an electronic expansion valve of the indoor unit;
according to the set temperature and the second environment temperature, the target operation frequency of the compressor is determined from a plurality of preset target operation frequencies, and when the target operation frequency and the first environment temperature meet a third preset condition, a third-stage low-temperature starting mode used for controlling the frequency rise of the compressor is operated, so that the frozen oil is returned to the compressor in an accelerating mode and/or the frozen oil outflow of the compressor is reduced, wherein the first environment temperature is the outdoor environment temperature, and the second environment temperature is the indoor environment temperature.
2. The air conditioner start-up control method as set forth in claim 1, wherein the step of operating the first-stage low-temperature start mode for turning on a throttle switch added in a return auxiliary circuit when the first ambient temperature and the compressor discharge temperature satisfy a first preset condition comprises:
when the first environment temperature and the compressor exhaust temperature are both smaller than a first preset temperature, determining that the first environment temperature and the compressor exhaust temperature meet a first preset condition, and controlling the throttle switch to be opened for a preset throttling duration.
3. The start-up control method of an air conditioner according to claim 1, wherein the step of operating the second-stage low-temperature start-up mode for adjusting the opening degree of the electronic expansion valve of the indoor unit when the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition comprises:
obtaining a capacity requirement according to the difference value between the set temperature and the second ambient temperature;
and when the set temperature, the second environment temperature and the first environment temperature meet a second preset condition according to the capacity requirement and the first environment temperature, operating the second-stage low-temperature starting mode for adjusting the opening degree of the electronic expansion valve of the indoor unit.
4. The air conditioner start-up control method as set forth in claim 3, wherein the step of operating the second-stage low-temperature start-up mode for adjusting the opening degree of the indoor unit electronic expansion valve when it is determined that the set temperature, the second ambient temperature and the first ambient temperature satisfy a second preset condition based on the capacity demand and the first ambient temperature comprises:
when the capacity requirement is larger than 0, judging whether the first environment temperature is larger than a second preset temperature or not;
if the first environment temperature is less than or equal to a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a first preset opening;
and if the first environment temperature is higher than a second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a second preset opening, wherein the second preset opening is smaller than the first preset opening.
5. The air conditioner start-up control method as claimed in claim 3 or 4, wherein the step of operating the second-stage low-temperature start-up mode for adjusting the opening degree of the indoor unit electronic expansion valve when it is determined that the set temperature, the second ambient temperature, and the first ambient temperature satisfy a second preset condition according to the capacity demand and the first ambient temperature includes:
when the capacity requirement is less than or equal to 0, judging whether the first environment temperature is greater than a second preset temperature;
if the first environmental temperature is less than or equal to a second preset temperature, adjusting the electronic expansion valve of the indoor unit to open a preset conduction time at a third preset opening degree;
and if the first environment temperature is higher than the second preset temperature, adjusting the minimum opening of the electronic expansion valve of the indoor unit to be a fourth preset opening, wherein the fourth preset opening is smaller than the third preset opening.
6. The air conditioner start-up control method as set forth in claim 1, wherein the step of operating the third-stage cold start mode for controlling the up-conversion of the compressor when the target operation frequency and the first ambient temperature satisfy a third preset condition comprises:
when the target operation frequency is greater than a first preset frequency and the first environment temperature is less than the first preset temperature, determining that the target operation frequency and the first environment temperature meet a third preset condition, controlling a compressor to operate at the first preset frequency for a first time period, then increasing the frequency, and detecting the frequency of the increased compressor in real time;
when the frequency of the compressor after the frequency increase is detected to be a second preset frequency, controlling the compressor to operate for a second time at the second preset frequency and then increasing the frequency, and returning to the step: detecting the frequency of the compressor after the frequency boosting in real time, wherein the second preset frequency is greater than the first preset frequency;
when the frequency of the compressor after the frequency increase is detected to be a third preset frequency, controlling the compressor to operate for a third time at the third preset frequency and then increasing the frequency, and returning to the step: detecting the frequency of the compressor after the frequency rise in real time, wherein the third preset frequency is greater than the second preset frequency;
and when the frequency of the compressor after the frequency increase is detected to be a fourth preset frequency, controlling the compressor to operate for a fourth time at the fourth preset frequency, wherein the fourth preset frequency is greater than the third preset frequency.
7. The air conditioner start-up control method as set forth in claim 6, wherein said air conditioner further comprises a pressure sensor, and said step of operating said third stage cold start mode for controlling compressor up-conversion is simultaneously performed with the steps of:
detecting the exhaust pressure and the suction pressure of the compressor through a pressure sensor;
when the exhaust pressure is greater than the first preset pressure or the exhaust temperature of the compressor is greater than a third preset temperature, the third-stage low-temperature starting mode is exited, and the frequency of the compressor is reduced;
when the suction pressure is less than or equal to a second preset pressure, exiting the third-stage low-temperature starting mode, prohibiting the compressor from increasing the frequency, and monitoring the suction pressure of the compressor in real time, wherein the second preset pressure is lower than the first preset pressure;
and when the monitored suction pressure is less than a third preset pressure, controlling the compressor to reduce a preset frequency value at preset time intervals until the suction pressure is less than or equal to a second preset pressure, wherein the third preset pressure is lower than the second preset pressure.
8. An air conditioner, characterized in that the air conditioner comprises: compressor, indoor unit and outdoor unit, memory, processor and air conditioner start-up control program stored on the memory and operable on the processor, the air conditioner start-up control program being configured to implement the steps of the air conditioner start-up control method of any one of claims 1 to 7.
9. A storage medium having stored thereon an air-conditioning start-up control program which, when executed by a processor, implements the steps of the air-conditioning start-up control method according to any one of claims 1 to 7.
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| CN111141075B (en) * | 2020-01-06 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN111561768B (en) * | 2020-05-06 | 2021-12-14 | 广东美的暖通设备有限公司 | Operation control method of air conditioner, air conditioner and readable storage medium |
| CN111669083B (en) * | 2020-06-17 | 2022-03-25 | 北京经纬恒润科技股份有限公司 | Low-temperature starting method and device for oil pump motor |
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