CN113280489B - Multi-split air conditioner control method, multi-split air conditioner and computer storage medium - Google Patents
Multi-split air conditioner control method, multi-split air conditioner and computer storage medium Download PDFInfo
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- CN113280489B CN113280489B CN202110606936.9A CN202110606936A CN113280489B CN 113280489 B CN113280489 B CN 113280489B CN 202110606936 A CN202110606936 A CN 202110606936A CN 113280489 B CN113280489 B CN 113280489B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004378 air conditioning Methods 0.000 claims abstract description 19
- 230000000875 corresponding effect Effects 0.000 claims description 59
- 230000009471 action Effects 0.000 claims description 12
- 230000002596 correlated effect Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 42
- 239000003921 oil Substances 0.000 description 121
- 230000035807 sensation Effects 0.000 description 31
- 230000007613 environmental effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000013021 overheating Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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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
Abstract
The invention discloses a control method of a multi-split air conditioner, which comprises the following steps: when an oil return starting condition is met, a first indoor unit which is not in a no-wind-sense mode in the multi-split air-conditioning unit is obtained; acquiring a target opening degree of a first electronic expansion valve of a first indoor unit; and adjusting the first electronic expansion valve to a target opening degree to perform oil return, wherein the target opening degree is larger than a first preset opening degree corresponding to the no-wind-sense mode. According to the invention, when the multi-connected unit needs oil return, the indoor unit which is not in a non-wind sense state is adjusted to be in a larger opening degree, so that main oil return is carried out through the indoor unit which is not in the non-wind sense state, thus, even if the opening degree of the multi-connected unit is still smaller, the oil return is less or no oil return exists, the integral oil return effect of the multi-connected unit can be ensured, meanwhile, the non-wind sense effect of the multi-connected unit is better, and the user comfort of the acting space of the non-wind sense indoor unit during oil return of the multi-connected unit is improved.
Description
Technical Field
The present invention relates to the field of multi-split air conditioner technologies, and in particular, to a control method of a multi-split air conditioner, and a computer storage medium.
Background
When the indoor units of the multi-split air conditioner are in the no-wind-feeling mode, if the multi-split air conditioner has an oil return requirement, the opening degree of the electronic expansion valve of the indoor unit required by the no-wind-feeling mode is usually small, and the opening degree of the electronic expansion valve of the indoor unit required by the oil return is usually large, so that the multi-split air conditioner exits the no-wind-feeling mode at present to perform oil return control on each indoor unit of the multi-split air conditioner, and re-enters the no-wind-feeling mode after the oil return is finished, so that the user comfort during oil return of the multi-split air conditioner is greatly reduced.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a control method of a multi-split air conditioner, the multi-split air conditioner and a computer storage medium, aiming at improving the user comfort of the acting space of the non-wind-sensing indoor unit when the multi-split air conditioner returns oil.
In order to achieve the above object, the present invention provides a control method of a multi-split air conditioner, including the steps of:
when an oil return starting condition is met, a first indoor unit which is not in a no-wind-sense mode in the multi-split air-conditioning unit is obtained;
acquiring a target opening degree of a first electronic expansion valve of the first indoor unit;
and adjusting the first electronic expansion valve to the target opening degree to perform oil return, wherein the target opening degree is larger than a first preset opening degree corresponding to the no-wind-sense mode.
Optionally, the step of obtaining the target opening degree of the first electronic expansion valve of the first indoor unit includes:
acquiring the number of second indoor units in a no-wind-sense mode in the multi-split air conditioner;
determining the ratio of the number to the total number of indoor units of the multi-split air conditioner;
and acquiring a target opening corresponding to the ratio, wherein the target opening is positively correlated with the ratio.
Optionally, after the step of acquiring the first indoor unit not in the no-wind-sensation mode in the multi-split air-conditioning system, the method further includes:
and maintaining the opening degree of a second electronic expansion valve of a second indoor unit in a no-wind-sense mode in the multi-split air-conditioning system unchanged.
Optionally, after the step of acquiring the first indoor unit not in the no-wind-sensation mode in the multi-split air-conditioning system, the method further includes:
and increasing the opening degree of a second electronic expansion valve of a second indoor unit in a no-wind-sense mode in the multi-split air-conditioning system, wherein the increased opening degree of the second electronic expansion valve is greater than the first preset opening degree and smaller than a second preset opening degree corresponding to an oil return mode, and the target opening degree is greater than the second preset opening degree.
Optionally, after the step of acquiring the first indoor unit not in the no-wind-sensation mode in the multi-split air-conditioning unit when the oil return starting condition is met, the method for controlling the multi-split air-conditioning unit further includes:
when a first indoor unit which is not in a no-wind mode is acquired, executing the step of acquiring the target opening degree of a first electronic expansion valve of the first indoor unit;
and when the first indoor unit which is not in the no-wind-sensation mode is not obtained, increasing the opening degree of a second electronic expansion valve of a second indoor unit in the no-wind-sensation mode in the multi-split air-conditioning system, wherein the increased opening degree of the second electronic expansion valve is larger than the first preset opening degree and smaller than a second preset opening degree corresponding to the oil return mode.
Optionally, the step of increasing the opening degree of a second electronic expansion valve of a second indoor unit in the multi-split air-conditioning system in the no-wind-sensation mode includes:
acquiring heat exchange parameters corresponding to the second indoor unit, wherein the heat exchange parameters comprise at least one of a fan windshield of the second indoor unit, a deflection angle of an air deflector of the second indoor unit, and ambient temperature and ambient humidity in an action space of the second indoor unit;
determining an opening degree increase value according to the heat exchange parameters, wherein the opening degree increase value is smaller than the difference value between the second preset opening degree and the first preset opening degree;
and increasing the opening degree of the second electronic expansion valve according to the opening degree increase value.
Optionally, the control method of the multi-split air conditioner further includes:
and maintaining the deflection angles of a fan windshield and an air deflector of a second indoor unit in a no-wind-sense mode in the multi-split air conditioner unchanged.
In addition, to achieve the above object, the present invention also provides a multi-split air conditioner, including: the control program of the multi-split air conditioner comprises a memory, a processor and a control program of the multi-split air conditioner, wherein the control program of the multi-split air conditioner is stored on the memory and can run on the processor, and when being executed by the processor, the control program of the multi-split air conditioner realizes the steps of the control method of the multi-split air conditioner.
In order to achieve the above object, the present invention further provides a computer storage medium having a control program of a multi-split air conditioner stored thereon, wherein the control program of the multi-split air conditioner realizes the steps of the control method of the multi-split air conditioner as described above when executed by a processor.
According to the control method of the multi-split air conditioner, the multi-split air conditioner and the computer storage medium provided by the embodiment of the invention, when an oil return starting condition is met, a first indoor unit which is not in a no-wind-sensation mode in the multi-split air conditioner is obtained, a target opening degree of a first electronic expansion valve of the first indoor unit is obtained, and the first electronic expansion valve is adjusted to the target opening degree to carry out oil return, wherein the target opening degree is larger than a first preset opening degree corresponding to the no-wind-sensation mode. According to the invention, when the multi-connected unit needs oil return, the indoor unit which is not in a non-wind sense state is adjusted to be in a larger opening degree, so that main oil return is carried out through the indoor unit which is not in the non-wind sense state, thus, even if the opening degree of the multi-connected unit is still smaller, the oil return is less or no oil return exists, the integral oil return effect of the multi-connected unit can be ensured, meanwhile, the non-wind sense effect of the multi-connected unit is better, and the user comfort of the acting space of the non-wind sense indoor unit during oil return of the multi-connected unit is improved.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a control method of multiple online units according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a control method of multiple on-line units according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating a control method of multiple on-line units according to yet another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a control method of multiple online units according to another embodiment of the present invention;
fig. 6 is a flowchart illustrating a control method of multiple online systems according to an exemplary embodiment of the present invention.
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
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a solution, when the multi-connected unit needs oil return, the indoor unit which is not in a non-wind sense is adjusted to be in a larger opening degree, and main oil return is carried out through the indoor unit which is not in the non-wind sense, so that even if the opening degree of the non-wind sense indoor unit is still smaller, the oil return is less or no oil return exists, the integral oil return effect of the multi-connected unit can be ensured, meanwhile, the non-wind sense effect of the non-wind sense indoor unit is also better, and the user comfort of the acting space of the non-wind sense indoor unit during oil return of the multi-connected unit is improved.
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 embodiment of the invention is a multi-split telephone.
As shown in fig. 1, the terminal may include: a processor 1001, e.g. a CPU, a communication bus 1002, a user interface 1003, a memory 1004. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may comprise a Display screen (Display), an input unit such as keys, and the optional user interface 1003 may also comprise a standard wired interface, a wireless interface. The memory 1004 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1004 may alternatively be a storage device separate from the processor 1001.
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.
As shown in fig. 1, the memory 1004, which is a kind of computer storage medium, may include therein a user interface module and a control program of a multi-split air conditioner.
In the terminal shown in fig. 1, the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the control program of the multi-split air conditioner stored in the memory 1004 and perform the following operations:
when an oil return starting condition is met, a first indoor unit which is not in a no-wind-sense mode in the multi-split air-conditioning unit is obtained;
acquiring a target opening degree of a first electronic expansion valve of a first indoor unit;
and adjusting the first electronic expansion valve to a target opening degree to perform oil return, wherein the target opening degree is larger than a first preset opening degree corresponding to the no-wind-sense mode.
Referring to fig. 2, in an embodiment, a method for controlling multiple online systems includes the following steps:
step S10, when the oil return starting condition is met, acquiring a first indoor unit which is not in a no-wind-sense mode in the multi-split air-conditioning system;
in this embodiment, when the multi-split air conditioning system is in operation, part of the lubricant oil in the compressor will be discharged out of the compressor along with the refrigerant gas, and enter the condenser, the piping and the evaporator, and only if the discharged lubricant oil is brought back to the compressor, the dynamic balance of the oil in the system can be maintained, and it is ensured that the compressor is fully lubricated without overheating and burnout is avoided, and the process from discharging to returning to the compressor is called as oil return. When the preset oil return starting condition is met, the residual lubricating oil in the compressor of the multi-split air conditioner is less, and the oil return requirement exists, so that the first indoor unit which does not run and has no wind sensation can be obtained in the multiple indoor units of the multi-split air conditioner, and the purpose of oil return is achieved by adjusting the opening degree of the electronic expansion valve of the first indoor unit.
Optionally, if there are a plurality of first indoor units that are not in a calm state at the same time, the opening degree of the electronic expansion valves of the plurality of first indoor units may be adjusted at the same time or sequentially. When the indoor unit is in a closed or standby state, the indoor unit also belongs to the first indoor unit which is not in the no-wind-sense mode, and oil return can be realized by adjusting the opening degree of the electronic expansion valve of the indoor unit.
Optionally, the oil return starting condition may include that the operating frequency of the compressor of the multi-split air conditioner meets a preset condition, specifically, when the operating frequency of the compressor is less than the preset frequency, timing is started, and when the duration of the operating frequency of the compressor being less than the preset frequency is longer than a first preset duration, it is determined that the operating frequency of the compressor meets the preset condition, where when the operating frequency of the compressor is less than the preset frequency, it indicates that oil return power of the compressor may be insufficient, and when the duration of the operating frequency of the compressor being less than the preset frequency is longer than the first preset duration, it indicates that dynamic balance of the lubricating oil of the multi-split air conditioner may be broken.
Alternatively, the oil return on condition may include that the compressor of the multi-split air conditioner is continuously operated for a time period longer than a preset time period, so as to ensure that the oil quantity of the lubricating oil in the compressor is sufficient through a periodic oil return action.
Optionally, the multi-split air conditioner includes a plurality of indoor units and an outdoor unit, the refrigerant pipeline of each indoor unit is provided with an electronic expansion valve, and the electronic expansion valve is configured to adjust a flow rate of a refrigerant flowing through the corresponding refrigerant pipeline, so as to change a heat exchange capacity of the corresponding indoor unit. The plurality of indoor units may be in at least one of a plurality of preset modes to implement functions corresponding to the preset modes, where the plurality of preset modes include a no-wind-sensation mode, a normal cooling mode, a normal heating mode, a power mode, and the like, which are not limited herein.
Step S20, acquiring a target opening degree of a first electronic expansion valve of the first indoor unit;
and step S30, adjusting the first electronic expansion valve to the target opening degree for oil return, wherein the target opening degree is larger than a first preset opening degree corresponding to the no-wind-sense mode.
In this embodiment, after determining that the first indoor unit without a wind sensation is not operated, the valve opening of the first electronic expansion valve provided in at least one first indoor unit is adjusted to a target opening, and the oil return resistance generated by the corresponding first electronic expansion valve is reduced by adjusting the valve opening, so as to achieve an oil return effect. The target opening degree can be larger than a first preset opening degree corresponding to the no-wind-sensation mode, so that the oil return resistance of the first indoor unit is ensured to be smaller than the oil return resistance of the second indoor unit running with or without wind sensation, namely the target opening degree is larger than the opening degree of a second electronic expansion valve arranged on the second indoor unit corresponding to the no-wind-sensation mode.
Alternatively, in order to achieve the no-wind effect, the first preset opening degree is generally small, but the opening degree of the second electronic expansion valve provided in the second indoor unit operating in the no-wind mode is set to be smaller than or equal to the first preset opening degree, so that the corresponding second indoor unit achieves the no-wind effect, therefore, when the valve opening degree of the first electronic expansion valve is adjusted to the target opening degree, the oil return amount of the first indoor unit not operating in the no-wind mode is ensured to be larger than that of the second indoor unit operating in the no-wind mode, so that the first indoor unit not operating in the no-wind mode is taken as a main object of oil return, and the second indoor unit operating in the no-wind mode is taken as a secondary object of oil return or a non-oil return object.
Alternatively, the opening degree of the first electronic expansion valve set in the first indoor unit without operating the no-wind-sensation mode may already be larger or in a closed state, and when the opening degree value of the first electronic expansion valve is adjusted, the actual opening degree of the first electronic expansion valve may be increased or decreased, or the opening degree of the first electronic expansion valve may be maintained unchanged, so as to achieve the purpose that the adjusted opening degree of the first electronic expansion valve is larger than the first preset opening degree corresponding to the no-wind-sensation mode.
Alternatively, when a plurality of first indoor units not operated with or without a wind sensation exist at the same time, the target opening degrees corresponding to the respective first indoor units may be the same or different, and are not limited herein.
Alternatively, the control of the first indoor unit not operated with or without a wind sensation is mainly based on the oil return effect, and the second indoor unit operated with or without a wind sensation is mainly based on the wind sensation, so that the opening degree of the second electronic expansion valve provided in the second indoor unit in a wind-free state can be maintained unchanged, or the opening degree of the second electronic expansion valve provided in the second indoor unit in a wind-free state can be increased to a certain extent, and a certain wind-free effect can be ensured.
Optionally, when a preset oil return starting condition is met, the deflection angles of the damper and the air deflector of the heat exchange fan arranged in the second indoor unit running in the multi-split air conditioner without wind sensation can be kept unchanged, so that the fan damper and the air deflector deflection angle arranged in the second indoor unit are always controlled according to a wind sensation free mode, and the wind sensation free effect of the second indoor unit is kept as much as possible.
In the technical scheme disclosed in the embodiment, when the multi-split air conditioner needs oil return, the indoor unit which is not in the non-wind sense is adjusted to a larger opening degree, and main oil return is performed through the indoor unit which is not in the non-wind sense, so that even if the opening degree of the non-wind sense indoor unit is smaller, the oil return is less or no oil return exists, the integral oil return effect of the multi-split air conditioner can be ensured, meanwhile, the non-wind sense effect of the non-wind sense indoor unit is better, and the user comfort of the acting space of the non-wind sense indoor unit during oil return of the multi-split air conditioner is improved.
In another embodiment, as shown in fig. 3, on the basis of the embodiment shown in fig. 2, the step S20 includes:
step S21, acquiring the number of second indoor units in a no-wind-sense mode in the multi-split air conditioner;
step S22, determining the ratio of the number to the total number of the indoor units of the multi-split air conditioner;
in this embodiment, when the target opening degree corresponding to the first indoor unit is obtained, the number of the second indoor units running without a wind sensation can be counted, and then the ratio of the number of the second indoor units in the wind sensation mode to the total number of the indoor units in the multi-split air conditioner is calculated, that is, the occupation ratio of the indoor units in the wind sensation mode is determined. It can be understood that the occupation ratio of the indoor units in the no-wind-sense mode represents the degree of influence of the second indoor unit, which cannot give priority to the oil return effect, on the oil return effect, that is, the degree of the oil return effect that the second indoor unit cannot provide.
Step S23, obtaining a target opening degree corresponding to the ratio, where the target opening degree is positively correlated with the ratio.
In this embodiment, the multi-split air conditioner is preset with a plurality of corresponding relationships between different ratios and different target opening degrees, and the ratios in the corresponding relationships correspond to the target opening degrees one to one. When the target opening degree is obtained, the valve opening degree may be directly adjusted to a target opening degree corresponding to the ratio, specifically, when the opening degree of the first electronic expansion valve is greater than the target opening degree, the valve opening degree may be decreased to the target opening degree, when the opening degree of the first electronic expansion valve is less than the target opening degree, the valve opening degree may be increased to the target opening degree, and when the opening degree of the first electronic expansion valve is equal to the target opening degree, the valve opening degree of the first electronic expansion valve may be maintained unchanged.
Optionally, the target opening degree is in positive correlation with the ratio, that is, when the ratio is larger, the target opening degree is larger, so as to increase the oil return effect of the first indoor unit through opening degree adjustment of the first electronic expansion valve, so as to correspondingly compensate the oil return effect that cannot be provided by the second indoor unit, and when the oil return that cannot be provided by the second indoor unit is larger, the increased oil return of the first indoor unit is larger, thereby ensuring the overall oil return effect of the multi-split air conditioner.
Optionally, in a correspondence relationship between a plurality of different ratios preset by the multi-split air conditioner and different target opening degrees, each target opening degree is greater than a first preset opening degree of the no-wind-sensation mode, so as to ensure that oil return of a first indoor unit which does not run with no wind sensation is greater than oil return of a second indoor unit which does not run with no wind sensation.
In the technical scheme disclosed in this embodiment, a ratio of the number of the indoor units running the second indoor unit without wind sensation to the total number of the indoor units is obtained, and an opening degree corresponding to the ratio is obtained, so as to correspondingly adjust the first electronic expansion valve, and correspondingly compensate an oil return effect which cannot be provided by the second indoor unit in the wind sensation mode by using an oil return effect brought by oil return adjustment of the first electronic expansion valve, thereby ensuring an overall oil return effect of the multi-split air conditioner, and also considering the wind sensation-free effect of the second indoor unit in the wind sensation mode, and improving user comfort of an action space where the second indoor unit is located.
In yet another embodiment, as shown in fig. 4, on the basis of the embodiment shown in any one of fig. 2 to fig. 3, after the step S10, the method further includes:
step S40, increasing an opening degree of a second electronic expansion valve of the second indoor unit in the mostly online mode, where the increased opening degree of the second electronic expansion valve is greater than a first preset opening degree and smaller than a second preset opening degree corresponding to the oil return mode, and the adjusted opening degree of the first electronic expansion valve is greater than the second preset opening degree.
In this embodiment, when the oil return opening condition is satisfied and the oil return is ensured by adjusting the first electronic expansion valve, the valve opening of the second electronic expansion valve provided in the second indoor unit operating in the multi-split air conditioner with the no-wind-sensation mode may be maintained unchanged, so as to maintain the no-wind-sensation effect required by the second indoor unit on the premise of achieving the multi-split air conditioner oil return effect. Of course, on the premise of meeting the preset oil return opening condition and realizing oil return by adjusting the first electronic expansion valve, the opening degree of the second electronic expansion valve in the second indoor unit with or without wind feeling can be increased, so as to carry out auxiliary oil return on the premise of achieving the effect of no wind sensation of the second indoor unit to a certain degree, therefore, in order to achieve the no-wind effect of the working space of the second indoor unit and the oil return of the second indoor unit, the increased valve opening degree of the second electronic expansion valve needs to be greater than the first preset opening degree corresponding to the no-wind mode, meanwhile, the opening degree of the second electronic expansion valve after being increased needs to be smaller than a second preset opening degree corresponding to the oil return mode, and the target opening degree is larger than a second preset opening degree corresponding to the oil return mode, so that the oil return of the first indoor unit is further improved on the basis of the conventional oil return effect, and the overall oil return effect of the multi-split air-conditioning unit is ensured.
Optionally, the multi-split air conditioner is prestored with a second preset opening degree associated with the oil return mode, and during conventional oil return control of the multi-split air conditioner, the opening degrees of the electronic expansion valves of the indoor units of the multi-split air conditioner are all adjusted to the second preset opening degree, so as to achieve a conventional oil return effect.
Optionally, in the multi-split air conditioner, if a plurality of second indoor units operating with or without a wind sensation exist at the same time, the opening degree adjustment of the second electronic expansion valve in each second indoor unit may be the same or different, and it may be ensured that the increased opening degree of the second electronic expansion valve is smaller than the second preset opening degree corresponding to the oil return mode and larger than the second preset opening degree corresponding to the oil return mode.
Optionally, when the opening degree of the second electronic expansion valve is increased, the heat exchange parameter corresponding to the second indoor unit may be obtained, an opening degree increase value corresponding to the heat exchange parameter is calculated, and then the opening degree of the second electronic expansion valve is correspondingly increased according to the opening degree increase value. The opening degree increasing value is smaller than the opening degree difference value of the second preset opening degree corresponding to the oil return mode and the first preset opening degree corresponding to the no-wind-sense mode, so that the opening degree of the second electronic expansion valve after being increased is ensured to be smaller than the second preset opening degree corresponding to the oil return mode. The heat exchange parameters can comprise air supply parameters of the second indoor unit and/or environmental parameters of an action space where the second indoor unit is located, the air supply parameters comprise a windshield of a fan corresponding to the second indoor unit and/or a deflection angle of an air deflector corresponding to the second indoor unit, and the environmental parameters comprise ambient temperature and/or ambient humidity.
In the technical scheme disclosed in this embodiment, when the oil return opening condition is satisfied, and the oil return effect is achieved by the first electronic expansion valve in the first indoor unit that is not operated with no wind sensation, the opening degree of the second electronic expansion valve arranged in the second indoor unit that is in the no wind sensation mode in the majority of indoor units can be increased, so that auxiliary oil return is performed while the no wind sensation effect of the second indoor unit is ensured to a certain extent, the no wind sensation effect of the second indoor unit is maintained while the overall oil return effect of the multi-split air conditioner is ensured, and the user comfort of the action space of the second indoor unit is improved.
In yet another embodiment, as shown in fig. 5, on the basis of the embodiment shown in any one of fig. 2 to fig. 4, after the step S10, the method further includes:
and step S50, when the first indoor unit not in the no-wind-sensation mode is not acquired, increasing the opening degree of the second electronic expansion valve of the second indoor unit in the no-wind-sensation mode in the majority of the online units, wherein the increased opening degree of the second electronic expansion valve is larger than the first preset opening degree and smaller than the second preset opening degree corresponding to the oil return mode.
In this embodiment, when the oil return opening condition is satisfied and the first indoor unit that does not operate with or without a wind sensation is acquired, any one of three situations may occur: all the indoor units are not in the no-wind-feeling mode, all the indoor units are in the no-wind-feeling mode, part of the indoor units are in the no-wind-feeling mode, and part of the indoor units are not in the no-wind-feeling mode. If all the indoor units are not in the no-wind-sense mode, oil return can be carried out on the multi-split air conditioner according to conventional oil return control, if part of the indoor units are in the no-wind-sense mode, if part of the indoor units are not in the absence of wind sensation, the multi-split air conditioner is controlled according to any one of the embodiments of fig. 2 to 4, if all the indoor units are in operation with or without wind sensation, that is, when the first indoor unit which is not operated with or without the wind sensation is not obtained, the opening degree of the second electronic expansion valve provided in each second indoor unit which is operated with or without the wind sensation mode in the majority of the indoor units is increased, so that the valve opening degree of the second electronic expansion valve after being increased is larger than a first preset opening degree corresponding to the no-wind-sense mode and is simultaneously smaller than a second preset opening degree corresponding to the oil return mode, the second indoor unit can return oil to a certain degree, the non-wind-sense effect of the second indoor unit to a certain degree is guaranteed, and the oil return effect of the multi-split air conditioner and the user comfort of the second indoor unit are both considered. And the target opening degree is larger than the second preset opening degree so as to ensure the integral oil return effect of the multi-split air-conditioning unit.
Optionally, when the opening degree of the second electronic expansion valve is increased, the heat exchange parameter corresponding to the second indoor unit may be obtained, an opening degree increase value corresponding to the heat exchange parameter is calculated, and then the valve opening degree of the second electronic expansion valve is increased according to the opening degree increase value. The opening degree increasing value is smaller than the opening degree difference value of the second preset opening degree corresponding to the oil return mode and the first preset opening degree corresponding to the no-wind-sense mode, so that the opening degree of the second electronic expansion valve after being increased is ensured to be smaller than the second preset opening degree corresponding to the oil return mode. The heat exchange parameters can comprise air supply parameters of the second indoor unit and/or environmental parameters of an action space where the second indoor unit is located, the air supply parameters comprise a windshield of a fan corresponding to the second indoor unit and/or a deflection angle of an air deflector corresponding to the second indoor unit, and the environmental parameters comprise ambient temperature and/or ambient humidity.
Optionally, the opening degree increase value is in a positive correlation with a windshield of a fan corresponding to the second indoor unit and a deflection angle of an air deflector corresponding to the second indoor unit, and when the deflection angle of the windshield corresponding to the fan in the second indoor unit and/or the deflection angle of the air deflector corresponding to the second indoor unit is larger, the no-wind-sensation effect of the second indoor unit is worse, which indicates that the requirement of a user corresponding to the second indoor unit on the no-wind-sensation effect is lower, so that the opening degree increase value is larger, so that the opening degree adjustment of the second electronic expansion valve arranged in the second indoor unit is more biased to return oil rather than no wind sensation. Similarly, the opening degree increase value is in positive correlation with the ambient temperature of the action space where the second indoor unit is located, and when the ambient temperature is higher, the required refrigerating capacity of the second indoor unit is higher, so that the opening degree increase value is higher, the refrigerating capacity of the second indoor unit is improved, and the user comfort of the action space where the second indoor unit is located is ensured. The opening degree increasing value is in negative correlation with the environmental humidity of the action space where the second indoor unit is located, and when the environmental humidity is higher, the opening degree increasing value is smaller, so that the situation that the refrigerating capacity of the second indoor unit is too high to reduce the environmental humidity is avoided, and the user comfort of the action space where the second indoor unit is located is ensured.
In the technical scheme disclosed in this embodiment, when a preset oil return opening condition is met, if all indoor units of the multi-split air conditioner are in no-wind-sense operation, the valve opening degree of the electronic expansion valve of each indoor unit can be increased, and the increased opening degree of the second electronic expansion valve is larger than a first preset opening degree corresponding to a no-wind-sense mode and smaller than a second preset opening degree corresponding to an oil return mode, so that the oil return effect of the multi-split air conditioner is ensured and the user comfort of an action space where the second indoor unit is located is also taken into account.
In an exemplary illustration, as shown in fig. 6, a control method of an air conditioner based on the embodiment shown in any one of fig. 2 to 5 is as follows:
when the preset oil return starting condition is met, the multi-split air conditioner can be operated partially without wind feeling, completely without wind feeling or completely without wind feeling.
(1) And for all non-windless operation of the internal machine, directly controlling operation according to conventional oil return: all the internal machine electronic expansion valves are adjusted to the oil return opening degree, and the compressors are adjusted to the preset oil return frequency;
(2) for the internal machine, partial operation and total operation are possible without wind feeling, and in order to ensure the effect of no wind feeling, the following control mode is adopted:
the running state of the internal machine without wind sense is not changed, namely the opening of the electronic expansion valve is not changed, and the opening of the wind shield of the fan and the opening of all wind guide mechanisms are not changed; other internal machine electronic expansion valves in the system are adjusted to a target opening, and the target opening is positively correlated with the number or the proportion of the internal machines which are opened without wind sensation; the compressor is raised to a preset oil return frequency; until the condition of returning oil and exiting is met, the frequency of the compressor is recovered, the non-wind-sensing indoor unit is continuously maintained unchanged, and the opening degrees of other indoor units are recovered;
(3) no wind sense is generated when the internal machine is completely started: the opening degree of all the internal machine electronic expansion valves is increased, the opening degree increase value is determined by the corresponding indoor environment temperature value, the indoor environment humidity value, the fan windshield and the opening degree of the air guide mechanism of the internal machine, the opening degree increase value is positively correlated with the fan windshield, positively correlated with the opening degree of the air guide mechanism, positively correlated with the indoor environment temperature value and negatively correlated with the indoor environment humidity value; the fan windshields and the air guide structures of all the internal machines are kept unchanged, the compressor is adjusted to a preset oil return frequency until an oil return exit condition is met, the frequency of the compressor is recovered, and the opening degree of each internal machine is recovered.
In the exemplary description, most users who start the indoor units with the no-wind-sensation function have higher requirements on comfort, while the conventional multi-split air-return scheme has priority on reliability and does not consider the influence on comfort during oil return, the exemplary description maintains the no-wind-sensation function while realizing oil return through the control logic so as to ensure the reliability and comfort of the multi-split air-conditioner and reduce the influence of oil return on the no-wind-sensation function.
In addition, an embodiment of the present invention further provides a multi-split air conditioner, where the multi-split air conditioner includes: the control program of the multi-split air conditioner is stored on the memory and can run on the processor, and when being executed by the processor, the control program of the multi-split air conditioner realizes the steps of the control method of the multi-split air conditioner according to the above embodiments.
In addition, an embodiment of the present invention further provides a computer storage medium, where a control program of a multi-split air conditioner is stored on the computer storage medium, and when the control program of the multi-split air conditioner is executed by a processor, the steps of the control method of the multi-split air conditioner according to the above embodiments are implemented.
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 solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., 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 (8)
1. A control method of a multi-split air conditioner is characterized by comprising the following steps:
when an oil return starting condition is met, a first indoor unit which is not in a no-wind-sense mode in the multi-split air-conditioning unit is obtained;
when the first indoor unit which is not in the no-wind mode is obtained, obtaining a target opening degree of a first electronic expansion valve of the first indoor unit;
adjusting the first electronic expansion valve to the target opening degree to perform oil return, wherein the target opening degree is larger than a first preset opening degree corresponding to the no-wind-sense mode;
and when the first indoor unit which is not in the no-wind-sensation mode is not obtained, increasing the opening degree of a second electronic expansion valve of a second indoor unit which is in the no-wind-sensation mode in the multi-split air-conditioning system, wherein the increased opening degree of the second electronic expansion valve is larger than the first preset opening degree and smaller than a second preset opening degree corresponding to the oil return mode.
2. The method of claim 1, wherein the step of obtaining the target opening degree of the first electronic expansion valve of the first indoor unit comprises:
acquiring the number of second indoor units in a no-wind-sense mode in the multi-split air conditioner;
determining the ratio of the number to the total number of indoor units of the multi-split air conditioner;
and acquiring a target opening corresponding to the ratio, wherein the target opening is positively correlated with the ratio.
3. The method for controlling a multi-split air conditioner according to claim 1, wherein after the step of obtaining the first indoor unit of the multi-split air conditioner that is not in the no-wind-sensation mode, the method further comprises:
and maintaining the opening degree of a second electronic expansion valve of a second indoor unit in a no-wind-sense mode in the multi-split air-conditioning system unchanged.
4. The method as claimed in claim 1, wherein after the step of obtaining the first indoor unit of the multi-split air conditioner not in the no-wind-sensation mode, the method further comprises:
and increasing the opening degree of a second electronic expansion valve of a second indoor unit in a no-wind-sense mode in the multi-split air-conditioning system, wherein the increased opening degree of the second electronic expansion valve is greater than the first preset opening degree and smaller than a second preset opening degree corresponding to an oil return mode, and the target opening degree is greater than the second preset opening degree.
5. The control method of the multi-split air conditioner as claimed in claim 1 or 4, wherein the step of increasing the opening degree of the second electronic expansion valve of the second indoor unit in the no-wind mode in the multi-split air conditioner comprises:
acquiring heat exchange parameters corresponding to the second indoor unit, wherein the heat exchange parameters comprise at least one of a fan windshield of the second indoor unit, a deflection angle of an air deflector of the second indoor unit, and ambient temperature and ambient humidity in an action space of the second indoor unit;
determining an opening degree increase value according to the heat exchange parameters, wherein the opening degree increase value is smaller than the difference value between the second preset opening degree and the first preset opening degree;
and increasing the opening degree of the second electronic expansion valve according to the opening degree increase value.
6. The control method of the multi-split air conditioner according to any one of claims 1 to 4, further comprising:
and maintaining the deflection angles of a fan windshield and an air deflector of a second indoor unit in a no-wind-sense mode in the multi-split air conditioner unchanged.
7. A multi-split air conditioner, comprising: memory, a processor and a control program of a multi-split air conditioner stored on the memory and operable on the processor, the control program of the multi-split air conditioner implementing the steps of the control method of the multi-split air conditioner according to any one of claims 1 to 6 when executed by the processor.
8. A computer storage medium, characterized in that the computer storage medium stores thereon a control program of a multi-split air conditioner, the control program of the multi-split air conditioner realizing the steps of the control method of the multi-split air conditioner according to any one of claims 1 to 6 when being executed by a processor.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003287312A (en) * | 2002-03-27 | 2003-10-10 | Mitsubishi Electric Corp | Device and method for controlling expansion valve of multi-room type air-conditioner |
| JP2011174687A (en) * | 2010-02-25 | 2011-09-08 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| CN108870807A (en) * | 2018-03-21 | 2018-11-23 | 青岛海信日立空调系统有限公司 | The method for controlling oil return and device of multi-line system, computer storage medium |
| CN109780689A (en) * | 2019-01-31 | 2019-05-21 | 广东美的制冷设备有限公司 | Control method, air conditioner and the computer readable storage medium of air conditioner |
| CN109945564A (en) * | 2019-03-22 | 2019-06-28 | 广东美的制冷设备有限公司 | The oil return method and oil return apparatus of multi-line system and its compressor |
-
2021
- 2021-05-31 CN CN202110606936.9A patent/CN113280489B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003287312A (en) * | 2002-03-27 | 2003-10-10 | Mitsubishi Electric Corp | Device and method for controlling expansion valve of multi-room type air-conditioner |
| JP2011174687A (en) * | 2010-02-25 | 2011-09-08 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| CN108870807A (en) * | 2018-03-21 | 2018-11-23 | 青岛海信日立空调系统有限公司 | The method for controlling oil return and device of multi-line system, computer storage medium |
| CN109780689A (en) * | 2019-01-31 | 2019-05-21 | 广东美的制冷设备有限公司 | Control method, air conditioner and the computer readable storage medium of air conditioner |
| CN109945564A (en) * | 2019-03-22 | 2019-06-28 | 广东美的制冷设备有限公司 | The oil return method and oil return apparatus of multi-line system and its compressor |
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