CN111141074A - Air conditioner control method and device, air conditioner and storage medium - Google Patents

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

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Publication number
CN111141074A
CN111141074A CN202010009873.4A CN202010009873A CN111141074A CN 111141074 A CN111141074 A CN 111141074A CN 202010009873 A CN202010009873 A CN 202010009873A CN 111141074 A CN111141074 A CN 111141074A
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China
Prior art keywords
opening degree
expansion valve
electronic expansion
air conditioner
oil return
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Granted
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CN202010009873.4A
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CN111141074B (en
Inventor
王猛
刘潘
刘合心
黄春
陈华
邓赛峰
余超群
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/16Lubrication
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2106Temperatures of fresh outdoor air

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a control method and a control device of an air conditioner, the air conditioner and a storage medium, and relates to the technical field of air conditioners, wherein the control method comprises the following steps: when an instruction of operating in an oil return mode is received, acquiring the current outdoor real-time environment temperature and the opening degree of the indoor electronic expansion valve; controlling a lower limit value of the running frequency of the compressor when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature; and controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve. Compared with the prior art, the invention can return oil without reversing when the air conditioner heats in winter, prevent the oil return heat supply of the indoor unit of the air conditioner from suspending and improve the comfort level of users.

Description

Air conditioner control method and device, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner, the air conditioner and a storage medium.
Background
In the prior art, the oil return problem of a compressor is always a difficult problem to be overcome in the air conditioning industry. When the air conditioning system operates, lubricating oil in the compressor can be taken out of the compressor along with the flowing of the refrigerant and is accumulated in the two devices, so that the heat exchange effect of the evaporator and the condenser is poor, and the heat exchange effect and the system performance are seriously influenced. Especially for a multi-split system, because the number of the indoor units is large, the opening degree of the electronic expansion valve of each indoor unit is different, and much lubricating oil is gathered in the indoor units. Meanwhile, the compressor runs under the condition of lack of lubricating oil, so that the abrasion of the compressor can be caused, and the service life of the compressor is shortened. At present, the most common oil return method in the heating mode is reversing by a four-way reversing valve, the heating mode is switched into the cooling mode to return oil, and at the moment, the air conditioner stops heating, so that the comfort of a user is seriously influenced.
Disclosure of Invention
The invention solves the problem that the oil return method of the existing air conditioner in the heating mode is the reversing of a four-way reversing valve, the heating mode is changed into the cooling mode to return oil, and the air conditioner stops heating at the moment, thus seriously influencing the comfort of users.
In order to solve the above problems, the present invention provides a control method of an air conditioner, comprising, when receiving an instruction to operate in an oil return mode, obtaining a current outdoor real-time environment temperature and an opening degree of an indoor electronic expansion valve; controlling a lower limit value of the running frequency of the compressor when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature; and controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve.
Thus, by receiving an oil return mode operation instruction; acquiring the current outdoor real-time environment temperature and the opening degree of the indoor electronic expansion valve; and then through improving the lower limit value of the compressor operating frequency and the opening degree of the electronic expansion valve of the indoor unit, non-reversing oil return during the heating in winter of the multi-connected unit is realized, and the oil return heat supply pause of the indoor unit of the air conditioner is prevented, so that the comfort level of a user is improved.
Further, the current outdoor real-time environment temperature is determined; the lower limit value of the compressor running frequency when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature control comprises the following steps:
determining a lower limit value of the running frequency of the compressor in the oil return mode of the air conditioner by the following formula:
F1=Min{F2,F2+a*(T2-T1)};
wherein: f1The lower limit value of the running frequency of the compressor in the oil return mode; f2The frequency of the oil return of the compressor under the normal operation mode of the air conditioner is set; t is1The current outdoor real-time environment temperature; t is2The outdoor ambient temperature in the normal operation mode of the air conditioner in winter; and a is the coefficient of the difference between the outdoor environment temperature in the normal operation mode of the air conditioner in winter and the current outdoor real-time environment temperature.
Therefore, the lower limit correction value of the operating frequency of the compressor is pre-judged according to the fitting formula of the ambient temperature and the frequency, and the noise increase caused by the overhigh frequency increasing of the compressor is prevented.
Further, the controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve includes:
and when the opening degree of the indoor electronic expansion valve is smaller than a first preset opening degree of the electronic expansion valve, controlling the opening degree of the indoor electronic expansion valve to be adjusted to the maximum opening degree.
Therefore, the opening degree of the indoor electronic expansion valve is smaller than the first preset opening degree of the electronic expansion valve, which indicates that the oil accumulation amount is large, the indoor electronic expansion valve needs to be fully opened to return oil, and the oil return rate is accelerated.
Further, the controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve further comprises:
and when the opening degree of the indoor electronic expansion valve is larger than the first preset opening degree of the electronic expansion valve and smaller than the second preset opening degree of the electronic expansion valve, controlling the opening degree of the indoor electronic expansion valve to increase by M steps.
Therefore, the opening degree of the indoor electronic expansion valve is larger than the first preset opening degree of the electronic expansion valve and smaller than the second preset opening degree of the electronic expansion valve, which indicates that the oil accumulation phenomenon exists in the indoor unit, and the opening degree of the indoor electronic expansion valve needs to be increased in order to prevent more oil accumulation.
Further, the controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve further comprises:
and when the opening degree of the indoor electronic expansion valve is greater than a second preset opening degree of the electronic expansion valve, controlling the opening degree of the indoor electronic expansion valve to be kept unchanged.
Therefore, the opening degree of the indoor electronic expansion valve is larger than the second preset opening degree of the electronic expansion valve, which shows that the oil storage amount of the indoor unit of the air conditioner is small, and the opening degree of the indoor electronic expansion valve is unchanged.
And further controlling the opening degree of an electronic expansion valve of the outdoor unit of the air conditioner to be adjusted to the maximum opening degree while controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve.
Therefore, the opening degree of the electronic expansion valve of the outdoor unit is fully opened, the flow speed of the refrigerant can be increased, and the purpose of oil return is improved. Therefore, the oil return is not reversed under the heating condition, the indoor unit is prevented from suspending heating in the oil return process, and the comfort level of a user is reduced.
The preset time further includes initializing the operation frequency of the compressor, the opening degree of the indoor electronic expansion valve and the opening degree of the electronic expansion valve of the air conditioner outdoor unit after the air conditioner oil return mode exits.
Therefore, normal operation can be guaranteed when the computer is normally started next time.
Compared with the prior art, the control method of the air conditioner has the advantages that the control method of the air conditioner can return oil without reversing when the air conditioner heats in winter, the oil return heat supply of the indoor unit of the air conditioner is prevented from being suspended, and the comfort level of a user is improved.
In order to solve the above technical problems, the present invention also provides a control device of an air conditioner, comprising,
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current outdoor real-time environment temperature and the opening degree of an indoor electronic expansion valve when receiving an instruction of operating in an oil return mode;
the control unit is used for controlling a lower limit value of the running frequency of the compressor when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature;
the control unit is also used for controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve.
Therefore, an oil return mode operation instruction is obtained through the obtaining unit, and the current outdoor real-time environment temperature and the opening degree of the indoor electronic expansion valve are obtained through the obtaining unit; and then the control unit controls the lower limit value of the running frequency of the compressor and the opening of the electronic expansion valve of the indoor unit to realize non-reversing oil return during heating in winter of the multi-split air conditioner, so that the oil return heat supply pause of the indoor unit of the air conditioner is prevented, and the comfort level of users is improved.
The advantages of the control device of the air conditioner of the invention relative to the prior art are the same as the advantages of the control method of the air conditioner relative to the prior art, and are not repeated herein.
In order to solve the technical problem, the present invention further provides an air conditioner, including a computer readable storage medium storing a computer program and a processor, where the computer program is read and executed by the processor to implement the control method of the air conditioner.
Thereby, a computer readable storage medium and a processor storing a computer program, the computer program being read and executed by the processor, by receiving an oil return mode operation instruction and by obtaining a current outdoor real-time ambient temperature and an opening degree of the indoor electronic expansion valve; and then the lower limit value of the running frequency of the compressor and the opening of the electronic expansion valve of the indoor unit are improved, non-reversing oil return during heating in winter of the multi-split air conditioner is realized, and the oil return heat supply pause of the indoor unit of the air conditioner is prevented, so that the comfort level of a user is improved.
Other advantages of the air conditioner of the present invention over the prior art are the same as those of the control method of the air conditioner over the prior art, and are not described herein again.
In order to solve the technical problem, the present invention further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is read and executed by a processor, the control method of the air conditioner is implemented.
The advantages of the computer-readable storage medium of the present invention over the prior art are the same as the advantages of the control method of the air conditioner over the prior art, and are not described herein again.
Drawings
Fig. 1 is a first flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a step S3 of a control method of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
When the multi-split system operates in a heating mode, because the air suction pipe of the compressor is thick, the four-way reversing valve is reversed, the flow velocity of refrigerant entering the internal machine is reduced, and oil accumulation is caused. Thus, the oil return mode is entered.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. The description of the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Throughout this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 to 3, an embodiment of the present invention provides a method for controlling an air conditioner, including the following steps:
s1, when an instruction of operating in an oil return mode is received, acquiring the current outdoor real-time environment temperature and the opening degree of the indoor electronic expansion valve; therefore, the air conditioner enters an oil return mode, timing is started, and the system needs to complete the oil return mode within a set time.
The running time of the oil return mode is preset time t; through the preset time t, after the preset time t is reached, the system automatically exits the oil return mode, and therefore automatic control is achieved.
The invention controls the oil return to be finished by the preset time t, preferably, the range of the preset time t is as follows: 10-20min, and preferably, the preset time t is 20 min. And after the oil return mode is carried out for 20min, the system exits the oil return mode. If the time of the oil return mode is too long, the oil return is already finished, so that the energy waste of the system and the service life of the compressor are easily caused; if the time of the oil return mode is too short, the oil return is not completely returned to the compressor, and the heating effect is affected. It should be noted that the preset time t of the present invention is a preferable time range of the embodiment, and the amount of the lubricating oil and the quality of the lubricating oil are different due to different types and sizes of the air conditioners, so the preset time t can be set according to the actual situation.
S2, controlling a lower limit value of the running frequency of the compressor when the compressor runs in an oil return mode according to the current outdoor real-time environment temperature;
some embodiments, including in particular,
determining a lower limit value of the running frequency of the compressor in the oil return mode of the air conditioner by the following formula:
F1=Min{F2,F2+a*(T2-T1)};
wherein: f1The lower limit value of the running frequency of the compressor in the oil return mode; f2The required oil return frequency of the compressor in the normal operation mode is obtained; t is1For the current outdoor real-time ambient temperature;T2The outdoor ambient temperature in the normal operation mode in winter; and a is the coefficient of the difference between the outdoor environment temperature in the normal operation mode of the air conditioner in winter and the current outdoor real-time environment temperature.
In terms of the correction of the operating frequency of the compressor, the outdoor ambient temperature affects the frequency increasing range of the compressor. When the ambient temperature increases, the viscosity of the lubricating oil is reduced, the increasing frequency of the compressor does not need to be too high, and oil return can be realized while the noise is prevented from increasing; when the ambient temperature is lowered, the viscosity of the lubricating oil increases, and the frequency-raising range of the compressor can be increased appropriately.
Required oil return frequency F of compressor in normal operation mode2The range of (A) is as follows: 30-50HZ, wherein different air conditioning systems, different refrigerants or different loads are required, and the required oil return frequency F of the compressor in the normal operation mode is required2The values of the air conditioner are different and need to be determined according to specific air conditioner models; t2 is the winter environmental temperature under standard working condition, which is the outdoor environmental temperature T under the winter normal operation mode specified by the national standard2It was 7 ℃. a, during system development and debugging, simulating different outdoor environment temperatures, testing the best oil return effect when the running frequency of the compressor is at the moment, and then obtaining a variable a; preferably, the variable a has a value range of: 2-10. It should be noted that, for different air conditioning systems, different refrigerants or different loads, the value of the variable a needs to be determined according to the specific air conditioning model.
The lower limit correction value of the running frequency of the compressor is obtained according to the ambient temperature for prejudgment, and noise increase caused by overhigh frequency increase is prevented.
S3, controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve; prevent the too big valve aperture, the liquid that causes is returned seriously. The invention realizes non-reversing oil return during heating in winter by improving the lower limit value of the running frequency of the compressor and the opening degree of the electronic expansion valve of the indoor unit, prevents the oil return heat supply of the indoor unit of the air conditioner from suspending, and thus improves the comfort level of users.
In the aspect of correcting the opening of the electronic expansion valve of the indoor unit, the opening of all the indoor unit valves of the multi-split air conditioner is monitored firstly. When the opening of an internal machine valve of the multi-split air conditioner is large, the flow rate of the refrigerant is high, the internal machine is not easy to store oil, the opening of the valve is not required to be too large in an oil return mode, and the phenomena of overlarge opening and compressor liquid impact are prevented; when the opening of an internal machine valve of the multi-split air conditioner is small, the flow rate of the refrigerant is low, the internal machine is easy to accumulate oil, especially when the flow rate of the closed internal machine is low, the oil accumulation is more serious, and therefore the opening of the valve needs to be increased in an oil return mode. Therefore, the opening degree of the electronic expansion valve of the internal machine in the oil return process is corrected according to the opening degree of the original internal machine valve.
In some specific embodiments, as shown in fig. 2, step S3 specifically includes:
s31 opening degree B of indoor electronic expansion valveOriginal source< first preset opening degree B of electronic expansion valve1When the oil is accumulated, the indoor electronic expansion valve needs to be opened fully to return oil, so that the oil return rate is increased; opening degree B of indoor electronic expansion valveOriginal sourceTo the maximum.
S32, first preset opening degree B of electronic expansion valve1Opening degree B of electronic expansion valve in roomOriginal source< second preset opening degree B of electronic expansion valve2In order to prevent oil accumulation in the indoor unit, the opening of the indoor electronic expansion valve needs to be increased. Opening degree B of indoor electronic expansion valveOriginal sourceAnd increasing the step M. Preferably, the range value of M is 80-120 steps; preferably, M is: and (5) 100 steps. And the oil return is finished within the preset time of the oil return mode.
S33 opening degree B of indoor electronic expansion valveOriginal sourceSecond preset opening degree B of electronic expansion valve2When the oil storage amount of the indoor unit of the air conditioner is small, the opening degree B of the indoor electronic expansion valveOriginal sourceRemain unchanged.
Preferably, the opening degree B of the first preset electronic expansion valve1Comprises the following steps: 100 steps; second preset opening degree B of electronic expansion valve2Comprises the following steps: and (5) 300 steps. The opening of the electronic expansion valve is too large, so that the liquid return is serious and the compressor is damaged; if the opening of the electronic expansion valve is too small, the oil return effect is not good, and the indoor heating effect is affected.
The different inner machines of the multi-split air conditioner are all provided with inner machine valves, the valve opening degree of one inner machine is more than 300 steps, the valve opening degree of the inner machine is kept unchanged, the different inner machines act differently, and each inner machine is independently judged and controlled and is not mutually related.
And S4, controlling the opening degree of the electronic expansion valve of the outdoor unit to be adjusted to the maximum opening degree.
Therefore, the electronic expansion valve of the outdoor unit is fully opened, the flow rate of the refrigerant can be increased, and the purpose of oil return is improved. Therefore, the oil return is not reversed under the heating condition, the indoor unit is prevented from suspending heating in the oil return process, and the comfort level of a user is reduced.
Preferably, when the operating frequency of the compressor and the opening degree of the indoor electronic expansion valve are increased, the electronic expansion valve of the outdoor unit can be opened at the same time, so that the flow rate of the refrigerant in the system is increased immediately, and oil return is accelerated.
And S5, initializing the operation frequency of the compressor, the opening of the indoor electronic expansion valve and the opening of the electronic expansion valve of the outdoor unit of the air conditioner after the air conditioner oil return mode exits. The normal operation can be guaranteed when the computer is normally started next time.
According to the control method of the air conditioner, the non-reversing oil return during the heating in winter of the multi-connected air conditioner is realized by improving the operating frequency of the compressor, the opening degree of the electronic expansion valve of the indoor unit and the opening degree of the electronic expansion of the outdoor unit, the oil return heat supply pause of the indoor unit of the air conditioner is prevented, and the comfort level of a user is improved.
Another embodiment of the present invention provides a control apparatus of an air conditioner, including,
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current outdoor real-time environment temperature and the opening degree of an indoor electronic expansion valve when receiving an instruction of operating in an oil return mode;
the control unit is used for controlling the lower limit value of the running frequency of the compressor when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature;
the control unit is also used for controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve.
Acquiring an oil return mode operation instruction through an acquisition unit, and acquiring the current outdoor real-time environment temperature and the opening degree of the indoor electronic expansion valve through the acquisition unit; and then the control unit controls the lower limit value of the running frequency of the compressor and the opening of the electronic expansion valve of the indoor unit to realize non-reversing oil return during heating in winter of the multi-split air conditioner, so that the oil return heat supply pause of the indoor unit of the air conditioner is prevented, and the comfort level of users is improved.
The advantages of the control device of the air conditioner of the invention relative to the prior art are the same as the advantages of the control method of the air conditioner relative to the prior art, and are not repeated herein.
Another embodiment of the present invention also provides an air conditioner including a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method of the air conditioner as described above.
Thereby, a computer readable storage medium and a processor storing a computer program, the computer program being read and executed by the processor, by receiving an oil return mode operation instruction and by obtaining a current outdoor real-time ambient temperature and an opening degree of the indoor electronic expansion valve; and then the lower limit value of the running frequency of the compressor and the opening of the electronic expansion valve of the indoor unit are improved, non-reversing oil return during heating in winter of the multi-split air conditioner is realized, and the oil return heat supply pause of the indoor unit of the air conditioner is prevented, so that the comfort level of a user is improved.
Other advantages of the air conditioner of the present invention over the prior art are the same as those of the control method of the air conditioner over the prior art, and are not described herein again.
The present invention also provides a computer-readable storage medium storing a computer program, which when read and executed by a processor, implements the control method of the air conditioner as described above.
The advantages of the computer-readable storage medium in this embodiment over the prior art are the same as the advantages of the control method of the air conditioner over the prior art, and are not described herein again.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A control method of an air conditioner, comprising:
when an instruction of operating in an oil return mode is received, acquiring the current outdoor real-time environment temperature and the opening degree of the indoor electronic expansion valve;
controlling a lower limit value of the running frequency of the compressor when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature;
and controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve.
2. The method as claimed in claim 1, wherein the controlling the lower limit value of the operating frequency of the compressor operating in the oil return mode according to the current outdoor real-time ambient temperature comprises:
determining a lower limit value of the running frequency of the compressor in the oil return mode of the air conditioner by the following formula:
F1=Min{F2,F2+a*(T2-T1)};
wherein: f1The lower limit value of the running frequency of the compressor in the oil return mode; f2The frequency of the oil return of the compressor under the normal operation mode of the air conditioner is set; t is1The current outdoor real-time environment temperature; t is2The outdoor ambient temperature in the normal operation mode of the air conditioner in winter; and a is the coefficient of the difference between the outdoor environment temperature in the normal operation mode of the air conditioner in winter and the current outdoor real-time environment temperature.
3. The control method of an air conditioner according to claim 1, wherein said controlling the opening degree of the indoor electronic expansion valve according to a preset opening degree of the electronic expansion valve comprises:
and when the opening degree of the indoor electronic expansion valve is smaller than a first preset opening degree of the electronic expansion valve, controlling the opening degree of the indoor electronic expansion valve to be adjusted to the maximum opening degree.
4. The control method of an air conditioner according to claim 1, wherein said controlling the opening degree of the indoor electronic expansion valve according to a preset opening degree of the electronic expansion valve further comprises:
and when the opening degree of the indoor electronic expansion valve is larger than a first preset opening degree of the electronic expansion valve and smaller than a second preset opening degree of the electronic expansion valve, controlling the opening degree of the indoor electronic expansion valve to increase by M steps.
5. The control method of an air conditioner according to claim 1, wherein said controlling the opening degree of the indoor electronic expansion valve according to a preset opening degree of the electronic expansion valve, further comprises:
and when the opening degree of the indoor electronic expansion valve is greater than a second preset opening degree of the electronic expansion valve, controlling the opening degree of the indoor electronic expansion valve to be kept unchanged.
6. The method of claim 1, wherein the opening degree of the electronic expansion valve of the outdoor unit of the air conditioner is controlled to a maximum opening degree while the opening degree of the indoor electronic expansion valve is controlled according to a preset opening degree of the electronic expansion valve.
7. The method of claim 6, further comprising initializing the operation frequency of the compressor, the opening degree of the indoor electronic expansion valve, and the opening degree of the electronic expansion valve of the outdoor unit of the air conditioner after the oil return mode of the air conditioner is exited.
8. A control apparatus of an air conditioner, comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current outdoor real-time environment temperature and the opening degree of an indoor electronic expansion valve when receiving an instruction of operating in an oil return mode;
the control unit is used for controlling a lower limit value of the running frequency of the compressor when the compressor runs in the oil return mode according to the current outdoor real-time environment temperature;
the control unit is also used for controlling the opening degree of the indoor electronic expansion valve according to the preset opening degree of the electronic expansion valve.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the control method of the air conditioner according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 7.
CN202010009873.4A 2020-01-06 2020-01-06 Air conditioner control method and device, air conditioner and storage medium Active CN111141074B (en)

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CN111141074B CN111141074B (en) 2022-06-24

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CN113531846A (en) * 2021-07-20 2021-10-22 广东美的制冷设备有限公司 Oil return control method and device of multi-split air conditioner and storage medium
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CN113719963A (en) * 2020-05-25 2021-11-30 青岛海尔空调电子有限公司 Oil return control method of multi-split air conditioning system
CN113719963B (en) * 2020-05-25 2022-12-27 青岛海尔空调电子有限公司 Oil return control method of multi-split air conditioning system
WO2021233343A1 (en) * 2020-08-28 2021-11-25 青岛海尔空调电子有限公司 Oil return control method for multi-split air-conditioning system
CN112648722A (en) * 2020-12-23 2021-04-13 青岛海尔空调器有限总公司 Control method and device for air conditioner, electronic equipment and storage medium
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