CN114543255A - Oil return control method and device, multi-split air conditioning system and storage medium - Google Patents
Oil return control method and device, multi-split air conditioning system and storage medium Download PDFInfo
- Publication number
- CN114543255A CN114543255A CN202111603841.8A CN202111603841A CN114543255A CN 114543255 A CN114543255 A CN 114543255A CN 202111603841 A CN202111603841 A CN 202111603841A CN 114543255 A CN114543255 A CN 114543255A
- Authority
- CN
- China
- Prior art keywords
- oil return
- oil
- conditioning system
- compressor
- split air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 239000003921 oil Substances 0.000 claims description 283
- 239000007788 liquid Substances 0.000 claims description 39
- 238000013486 operation strategy Methods 0.000 claims description 29
- 239000010705 motor oil Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 12
- 238000004891 communication Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000346 nonvolatile oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
-
- 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
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/03—Oil level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of air conditioners and discloses an oil return control method. The oil return control method is particularly applied to a multi-split air conditioning system, and the multi-split air conditioning system comprises an oil level detection device; the method specifically comprises the steps of obtaining oil quantity information measured by an oil level detection device; acquiring the running state information of a plurality of indoor units under the condition that the oil amount information indicates that the compressor is in an oil shortage state; determining a target oil return scheme according to the running condition information of the indoor units; and controlling the multi-split air conditioning system to execute a target oil return scheme. The method comprises the steps that whether oil is in shortage in a compressor body of the multi-split air-conditioning system is determined through an oil level detection device, and a target oil return scheme executed by the multi-split air-conditioning system is determined according to operation condition information of a plurality of indoor units in an oil shortage state; therefore, the oil return operation frequency of the multi-split air conditioning system is reduced, and the influence of noise on users in the oil return operation process is reduced. The application also discloses an oil return control device, a multi-split air conditioning system and a storage medium.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an oil return control method and device, a multi-split air conditioning system and a storage medium.
Background
In recent years, as the living standard of people is improved, the requirement on the comfort level of the indoor environment is higher and higher, and the multi-split air conditioning system is favored by people. Generally, a multi-split air conditioning system includes an outdoor unit and a plurality of indoor units; the outdoor heat exchanger and the compressor are arranged in the outdoor unit. The indoor units are generally installed in different rooms to adjust the ambient temperature in the rooms.
Since the plurality of indoor units are used to adjust the ambient temperatures of different rooms, the operating states of the plurality of indoor units are often different. In the oil return control of the existing multi-split air conditioning system, a fixed oil return period is set, and after the system runs for a preset time, the multi-split air conditioning system is controlled to perform one oil return operation. When the oil return operation is performed, no matter what operation state each of the plurality of indoor units is in, even if one of the indoor units is in a stopped state at that time, the electronic expansion valve associated therewith is controlled to operate in accordance with the oil return operation, and thus, a user in a room in which an indoor unit that is not in use is located is also affected by noise.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the process of executing the oil return control mode, frequent oil return of the multi-split air-conditioning system can be caused, the noise is generated, and poor use experience of the multi-split air-conditioning system is brought to users.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides an oil return control method and device, a multi-split air conditioning system and a storage medium, so as to change the triggering logic of oil return operation, reduce the oil return frequency of the multi-split air conditioning system, reduce the influence of noise on a user in the oil return operation process, and improve the use experience of the user.
In some embodiments, the oil return control method is applied to a multi-split air conditioning system, and the oil return control method includes:
in some embodiments, the oil level detection device is a float assembly disposed within the compressor; determining oil quantity information by: acquiring detection information of the floater assembly, wherein the detection information comprises liquid level data of engine oil in the compressor; determining that the oil quantity information indicates that the compressor is in an oil shortage state under the condition that the liquid level data is less than or equal to a preset reference liquid level; and under the condition that the liquid level data is greater than the preset reference liquid level, determining that the oil quantity information indicates that the compressor is in an oil-shortage-free state.
In some embodiments, the predetermined reference level has a height that is lower than a height of a suction port of the compressor.
In some embodiments, the operation condition information of the plurality of indoor units includes the number of indoor units in an operation state among the plurality of indoor units; determining a target oil return scheme according to the running condition information of the indoor units, wherein the target oil return scheme comprises the following steps: acquiring current load information of indoor units in running states; determining the current load proportion of the current operating load of the multi-split air-conditioning system occupying the full load according to the current load information of the indoor units in the operating states; and determining an oil return operation strategy of the target oil return scheme according to the current load proportion of the multi-split air-conditioning system.
In some embodiments, determining an oil return operation strategy of a target oil return scheme according to a current load proportion of the multi-split air conditioning system includes: acquiring the current operating frequency of the compressor; and determining an oil return operation strategy of the target oil return scheme according to the current load proportion of the multi-split air-conditioning system and the current operation frequency of the compressor.
In some embodiments, determining an oil return operation strategy of a target oil return scheme according to a current load proportion of the multi-split air conditioning system and a current operation frequency of the compressor includes: acquiring an oil return information base, wherein the oil return information base comprises a plurality of operating frequencies of the multi-split air-conditioning system and oil return operation strategies corresponding to the multi-split air-conditioning system under different operating frequencies and operating states with different load proportions; the oil return operation strategy comprises oil return opening degrees of electronic expansion valves corresponding to a plurality of indoor units in the multi-split air conditioning system respectively and operation parameters of oil return operation; and determining an oil return operation strategy which is matched with the current operation frequency of the compressor and accords with the target oil return scheme of the current load proportion from the oil return information base.
In some embodiments, the oil return control device is applied to a multi-split air conditioning system, and the oil return control device includes a processor and a memory storing program instructions, wherein the processor executes the oil return control method when executing the program instructions.
In some embodiments, the multi-split air conditioning system includes a compressor disposed at an outdoor side and a plurality of indoor units, and further includes an oil level detection device for detecting oil amount information of oil pressurized in the compressor and an oil return control device as described above.
In some embodiments, the oil level detection device includes a float assembly disposed within the cavity of the compressor and configured to detect level data of oil pressurized within the compressor.
In some embodiments, the storage medium stores program instructions, and the program instructions, when executed, perform the oil return control method as described above.
The oil return control method and device, the multi-split air conditioning system and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
the method comprises the steps that an oil level detection device is arranged in a compressor, whether the multi-split air-conditioning system is lack of oil in the compressor body under the current operation condition is determined through the oil level detection device, and a target oil return scheme for the multi-split air-conditioning system to execute is determined according to the operation condition information of a plurality of indoor units under the oil lack state of the compressor body. Therefore, the periodic oil return control logic of the multi-split air conditioning system is changed, whether the compressor body is lack of oil or not is determined, and whether oil return operation is performed or not is determined according to the running condition information of the indoor units; therefore, the oil return operation frequency of the multi-split air-conditioning system is reduced, the influence of noise in the oil return operation process on a user is reduced, and the use experience of the user on the multi-split air-conditioning system is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic view of a compressor according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an oil return control method according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of another oil return control method provided by an embodiment of the disclosure;
fig. 4 is a schematic diagram of another oil return control method provided by the embodiment of the disclosure;
fig. 5 is a schematic diagram of another oil return control method provided by the embodiment of the disclosure;
fig. 6 is a schematic diagram of an oil return control device according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
In the embodiment of the disclosure, the multi-split air conditioning system comprises a compressor arranged on the outdoor side and a plurality of indoor units, and further comprises an oil level detection device, wherein the oil level detection device is used for detecting oil quantity information of engine oil in the compressor.
Alternatively, as shown in fig. 1, the oil level detection device may include a float assembly 220 disposed within the cavity of the compressor 200, the float assembly 220 being configured to detect level data of oil pressurized within the compressor 200. Wherein, a reference liquid level line is further disposed in the cavity of the compressor 200.
Optionally, the reference level line within the cavity of the compressor 200 is located below the suction port 210 of the compressor 200. When the position of the float assembly 220 is lowered to or below the reference liquid level line, it indicates that the compressor 200 is in an oil-starvation state at this time; at this time, in order to more accurately judge whether the multi-split air conditioning system is in an oil shortage state, the operation state information of the indoor units needs to be further acquired. Conversely, when the position of the float assembly 220 is above the reference liquid level line, it means that there is no oil shortage in the compressor 200, and no oil return operation is required.
Alternatively, the reference level line may be a preset position located below the suction port 210 of the compressor.
Therefore, through the structural improvement on the oil level detection in the compressor 200, the preposed judgment on whether the compressor 200 body is lack of oil is added, and the judgment precision on whether the multi-connected air-conditioning system is lack of oil is improved, so that the current situation of frequent oil return of the multi-connected air-conditioning system is improved.
Referring to fig. 2, an embodiment of the present disclosure provides an oil return control method, which is applied to a multi-split air conditioning system, and the oil return control method includes:
and S01, the multi-split air conditioning system acquires oil amount information measured by the oil level detection device.
And S02, acquiring the running state information of the indoor units by the multi-split air conditioning system when the oil amount information indicates that the compressor is in an oil shortage state.
And S03, determining a target oil return scheme by the multi-split air conditioning system according to the running condition information of the indoor units.
And S04, controlling the multi-split air conditioner system to execute a target oil return scheme.
By adopting the oil return control method provided by the embodiment of the disclosure, an oil level detection device can be arranged in the compressor, whether the multi-split air-conditioning system is lack of oil in the compressor body under the current operation condition is determined through the oil level detection device, and a target oil return scheme executed by the multi-split air-conditioning system is determined according to the operation condition information of a plurality of indoor units under the oil lack condition of the compressor body. Therefore, the regular oil return control logic of the multi-split air conditioning system is changed, whether the compressor body is lack of oil is determined firstly, and whether oil return operation is performed is determined according to the running condition information of the indoor units; therefore, the oil return operation frequency of the multi-split air-conditioning system is reduced, the influence of noise in the oil return operation process on a user is reduced, and the use experience of the user on the multi-split air-conditioning system is improved.
In some embodiments, the oil return control method for the multi-split air conditioning system comprises the following steps: acquiring oil quantity information measured by an oil level detection device; acquiring the running state information of a plurality of indoor units under the condition that the oil amount information indicates that the compressor is in an oil shortage state; determining a target oil return scheme according to the running condition information of the indoor units; and controlling the multi-split air conditioning system to execute a target oil return scheme.
Optionally, the executing body for executing the above steps may be a multi-split air conditioning system. Specifically, the multi-split air conditioning system acquires oil quantity information measured by an oil level detection device; under the condition that the oil quantity information indicates that the compressor is in an oil shortage state, the multi-split air-conditioning system acquires the running condition information of the indoor units; the multi-split air conditioning system determines a target oil return scheme according to the running condition information of the indoor units; and controlling the multi-split air conditioning system to execute a target oil return scheme.
Optionally, after the multi-split air conditioning system obtains the information of the oil amount measured by the oil level detection device, the oil return control method may further include: and determining whether the body of the compressor in the multi-split air conditioning system is in an oil shortage state or not according to the detection data of the oil level detection device.
Thus, whether the body of the compressor is lack of oil or not is determined through the detection data of the oil level detection device, and whether the body of the compressor is lack of oil or not can be preliminarily determined for the multi-split air conditioning system. If the fact that the body of the compressor is not in oil shortage is determined, whether the whole multi-split air conditioning system is in oil shortage or not does not need to be further judged, and corresponding oil return operation is not needed. However, if it is determined that the body of the compressor is in an oil shortage state, in order to perform a further accurate determination, it is necessary to determine whether the oil return operation needs to be performed in the multi-split air conditioning system in combination with the operation conditions of the plurality of indoor units.
Optionally, the oil level detection device is a float assembly disposed within the compressor; determining oil quantity information by: acquiring detection information of the floater assembly, wherein the detection information comprises liquid level data of engine oil in the compressor; determining that the oil quantity information indicates that the compressor is in an oil shortage state under the condition that the liquid level data is less than or equal to the preset reference liquid level; and under the condition that the liquid level data is greater than the preset reference liquid level, determining that the oil quantity information indicates that the compressor is in an oil-shortage-free state.
Wherein, the height of the preset reference liquid level is lower than that of a suction port of the compressor. The selection of the preset reference level is not particularly limited as long as it is slightly lower than the suction port of the compressor. In particular, the preset reference level may be in line with a level of a reference level line within the cavity of the compressor. That is, the liquid level data is less than or equal to the preset reference liquid level, indicating that the position of the float assembly is lowered to or below the reference liquid level line, at which time it may be determined that the body of the compressor is in an oil starved state. The liquid level data is larger than a preset reference liquid level, the position of the floater assembly is higher than the reference liquid level line, and at the moment, the body of the compressor can be determined to be in an oil-shortage-free state.
The body of the compressor is not in oil shortage, so that the multi-online air conditioning system is not in an oil shortage state, and the oil return operation can be omitted. And as it is determined that the body of the compressor is lack of oil, it cannot be directly determined whether the multi-split air-conditioning system has the condition of oil leakage of the compressor due to refrigerant leakage, the operation conditions of the indoor units need to be further judged, and then an oil return strategy corresponding to a target oil return scheme which needs to be executed by the multi-split air-conditioning system is determined. Therefore, the oil return frequency of the multi-split air-conditioning system can be reduced to a certain extent, and the accuracy of judging whether the multi-split air-conditioning system is lack of oil is improved.
With reference to fig. 3, an embodiment of the present disclosure provides another oil return control method, including:
and S11, the multi-split air conditioning system acquires the liquid level data of the compressor internal pressure engine oil detected by the floater assembly.
And S12, under the condition that the liquid level data is larger than the preset reference liquid level, the multi-split air-conditioning system determines that the oil quantity information indicates that the compressor is in an oil shortage state.
And S13, the multi-split air conditioning system does not perform oil return operation, and acquires the liquid level data of the compressor internal pressure engine oil detected by the float assembly again after a preset time interval.
In this way, the floater assembly is arranged in the compressor, whether the body of the compressor is lack of oil under the current operation condition of the multi-split air-conditioning system is determined through the floater assembly, and if the body of the compressor is determined to be in a state of not lack of oil, the multi-split air-conditioning system can be controlled not to perform oil return operation within a preset time period. By the preposed judging step of judging whether the body of the compressor is lack of oil or not, under the condition that the body of the compressor is determined not to be lack of oil, the oil return operation is not executed; the oil return operation frequency of the multi-split air conditioning system is effectively reduced, the oil return operation frequency is reduced, the occurrence frequency of noise generated in the oil return operation process can be reduced to a certain extent, the frequency that a user in a room without an indoor unit is disturbed by the noise is reduced, and therefore the use experience of the user on the multi-split air conditioning system is improved.
Optionally, the operation condition information of the plurality of indoor units includes the number of indoor units in an operation state among the plurality of indoor units; determining a target oil return scheme according to the running condition information of the indoor units, wherein the target oil return scheme comprises the following steps: acquiring current load information of indoor units in running states; determining the current load proportion of the current operating load of the multi-split air-conditioning system occupying the full load according to the current load information of the indoor units in the operating states; and determining an oil return operation strategy of the target oil return scheme according to the current load proportion of the multi-split air-conditioning system.
In practical application, a starting instruction of the multi-split air conditioning system is responded, liquid level data detected by the floater component is acquired for the first time after the compressor runs for the first preset time, and whether the body of the compressor is lack of oil is judged for the first time according to the liquid level data. If the body of the compressor is determined not to be lack of oil, the liquid level data detected by the floater assembly can be acquired again after a second preset time interval, so that whether the body of the compressor is lack of oil or not can be judged again.
Under the condition that the body of the compressor is determined to be in the oil shortage state according to the liquid level data detected by the floater component, the starting number of the indoor units and the current load ratio of the current operation load of the indoor units in the starting state to the full load of the multi-split air-conditioning system are obtained, and the multi-split air-conditioning system is controlled to execute an oil return operation strategy corresponding to the current load ratio.
The oil return operation strategy may include an oil return opening degree of an electronic expansion valve corresponding to each of the plurality of indoor units, an operation frequency of the compressor when the oil return operation is performed, and an execution frequency of the oil return operation. The frequency of performing the oil returning operation may be how often the oil returning operation is performed every long time in a case where the body of the compressor is always in the oil shortage state.
With reference to fig. 4, an embodiment of the present disclosure provides another oil return control method, including:
and S11, the multi-split air conditioning system acquires the liquid level data of the compressor internal pressure engine oil detected by the floater assembly.
And S21, determining that the oil quantity information indicates that the compressor is in an oil shortage state under the condition that the liquid level data is less than or equal to the preset reference liquid level.
And S22, the multi-split air conditioning system acquires the current load information of the indoor units in the running state.
And S23, determining the current load proportion of the current operating load of the multi-split air-conditioning system occupying the full load according to the current load information of the indoor units in the operating states.
And S24, determining an oil return operation strategy of the target oil return scheme by the multi-split air conditioning system according to the current load proportion of the multi-split air conditioning system.
Therefore, the floater component is arranged in the compressor, whether the body of the compressor of the multi-split air-conditioning system is in an oil shortage state under the current operation condition is determined through the floater component, and a target oil return scheme for the multi-split air-conditioning system to execute is determined according to the operation condition information of the indoor units when the body of the compressor is determined to be in the oil shortage state. The control logic of the periodic oil return of the multi-split air-conditioning system is improved, the judgment precision of whether the multi-split air-conditioning system is lack of oil is improved through the pre-judgment step of whether the body of the compressor is lack of oil, and an oil return operation strategy matched with the current operation state is performed only when the multi-split air-conditioning system is determined to be possibly in the oil lack state; the oil return operation frequency of the multi-split air conditioning system can be effectively reduced, the oil return operation frequency can be reduced to a certain extent, the occurrence frequency of noise generated in the oil return operation process is reduced, and the frequency that a user in a room without an indoor unit is disturbed by the noise is reduced, so that the use experience of the user on the multi-split air conditioning system is improved.
Optionally, determining an oil return operation strategy of the target oil return scheme according to the current load proportion of the multi-split air conditioning system includes: acquiring the current operating frequency of the compressor; and determining an oil return operation strategy of the target oil return scheme according to the current load proportion of the multi-split air-conditioning system and the current operation frequency of the compressor.
Optionally, determining an oil return operation strategy of the target oil return scheme according to the current load proportion of the multi-split air conditioning system and the current operating frequency of the compressor, where the oil return operation strategy includes: acquiring an oil return information base, wherein the oil return information base comprises a plurality of operating frequencies of the multi-split air-conditioning system and oil return operation strategies corresponding to the multi-split air-conditioning system under different operating frequencies and operating states with different load proportions; the oil return operation strategy comprises oil return opening degrees of electronic expansion valves corresponding to a plurality of indoor units in the multi-split air conditioning system respectively and operation parameters of oil return operation; and determining an oil return operation strategy which is matched with the current operation frequency of the compressor and accords with the target oil return scheme of the current load proportion from the oil return information base.
In practical application, taking the example of determining that the load proportion of the multi-split air conditioning system is 50% in the current operating state, at this time, the corresponding relationship between the operating frequency of the compressor matched with the load proportion of 50% and the oil return operating frequency is determined from the oil return information base. For example, when the operation frequency is in a range of less than 30Hz, the corresponding oil return operation frequency is 3 hours to perform one oil return operation; when the operation frequency is in the range of less than 60Hz and more than or equal to 30Hz, carrying out oil return operation once when the corresponding oil return operation frequency is 6 hours; when the operation frequency is in the range of more than or equal to 60Hz, the corresponding oil return operation frequency is 12 hours, and one oil return operation is carried out. Therefore, under the condition that the body of the compressor is determined to be in the oil shortage state, the multi-split air-conditioning system can determine the oil return operation frequency of the target oil return scheme which is matched with the current operation frequency of the compressor and accords with the current load proportion according to the current load proportion and the current operation frequency of the compressor.
With reference to fig. 5, an embodiment of the present disclosure provides another oil return control method, including:
and S31, acquiring the current operating frequency of the compressor by the multi-split air conditioning system.
And S32, determining an oil return operation strategy of the target oil return scheme by the multi-split air-conditioning system according to the current load proportion of the multi-split air-conditioning system and the current operation frequency of the compressor.
Therefore, through the step of determining the oil return operation strategy, the multi-split air conditioning system can be controlled to execute the oil return operation strategy matched with the current operation state under the condition that the body of the compressor is in the oil shortage state, so that a better oil return effect is realized.
As shown in fig. 6, an oil return control device according to an embodiment of the present disclosure includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call the logic instructions in the memory 101 to execute the oil return control method of the above embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the functional application and data processing by executing the program instructions/modules stored in the memory 101, that is, implements the oil return control method in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the present disclosure provides a multi-split air conditioning system, including a compressor disposed at an outdoor side and a plurality of indoor units, and with reference to the schematic structural diagram of the compressor shown in fig. 1, the multi-split air conditioning system further includes an oil level detection device for detecting oil amount information of engine oil in the compressor 200, and the above oil return control device.
By adopting the multi-split air conditioning system provided by the embodiment of the disclosure, an oil level detection device can be arranged in the compressor 200, whether the multi-split air conditioning system is lack of oil in the compressor 200 body under the current operation condition is determined through the oil level detection device, and a target oil return scheme for the multi-split air conditioning system to execute is determined according to the operation condition information of the indoor units when the compressor 200 body is in the oil lack state. Therefore, the regular oil return control logic of the multi-split air conditioning system is changed, whether the compressor 200 is lack of oil is determined firstly, and whether oil return operation is performed is determined according to the running condition information of the indoor units; therefore, the oil return operation frequency of the multi-split air-conditioning system is reduced, the influence of noise in the oil return operation process on a user is reduced, and the use experience of the user on the multi-split air-conditioning system is improved.
Optionally, in conjunction with the schematic structural diagram of the compressor shown in fig. 1, the oil level detection device includes a float assembly 220 disposed in the cavity of the compressor 200, and the float assembly 220 is configured to detect level data of oil pressurized in the compressor 200.
A reference liquid level line is further disposed in the cavity of the compressor 200, and the reference liquid level line is located below the suction port 210 of the compressor 200. The reference level line may be a predetermined position below the suction port 210 of the compressor.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the oil return control method.
An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the oil return control method.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. The oil return control method is applied to a multi-split air conditioning system, wherein the multi-split air conditioning system comprises a compressor and a plurality of indoor units, the compressor is arranged on the outdoor side, and the multi-split air conditioning system is characterized by further comprising an oil level detection device, and the oil level detection device is used for detecting oil quantity information of engine oil in the compressor; the oil return control method comprises the following steps:
acquiring oil quantity information measured by the oil level detection device;
acquiring running state information of a plurality of indoor units under the condition that the oil amount information indicates that the compressor is in an oil shortage state;
determining a target oil return scheme according to the running condition information of the indoor units;
and controlling the multi-split air conditioning system to execute a target oil return scheme.
2. The oil return control method according to claim 1, wherein the oil level detection device is a float assembly provided in the compressor; determining the oil quantity information by:
acquiring detection information of the floater assembly, wherein the detection information comprises liquid level data of engine oil pressurized in the compressor;
determining that the oil quantity information indicates that the compressor is in an oil shortage state under the condition that the liquid level data is less than or equal to a preset reference liquid level;
and under the condition that the liquid level data is larger than a preset reference liquid level, determining that the oil quantity information represents that the compressor is in an oil shortage-free state.
3. The oil return control method according to claim 2,
the height of the preset reference liquid level is lower than that of a suction port of the compressor.
4. The oil return control method according to claim 1, 2, or 3, wherein the operation condition information of the plurality of indoor units includes the number of indoor units in an operation state among the plurality of indoor units;
the determining a target oil return scheme according to the operation condition information of the indoor units comprises the following steps:
acquiring current load information of indoor units in running states;
determining the current load proportion of the current operating load of the multi-split air-conditioning system occupying the full load according to the current load information of the indoor units in the operating states;
and determining an oil return operation strategy of a target oil return scheme according to the current load proportion of the multi-split air-conditioning system.
5. The oil return control method according to claim 4, wherein the determining an oil return operation strategy of a target oil return scheme according to the current load proportion of the multi-split air conditioning system comprises:
acquiring the current operating frequency of the compressor;
and determining an oil return operation strategy of a target oil return scheme according to the current load proportion of the multi-split air-conditioning system and the current operation frequency of the compressor.
6. The oil return control method according to claim 5, wherein the determining an oil return operation strategy of a target oil return scheme according to the current load proportion of the multi-split air conditioning system and the current operating frequency of the compressor comprises:
acquiring an oil return information base, wherein the oil return information base comprises a plurality of operating frequencies of the multi-split air-conditioning system and oil return operation strategies corresponding to the multi-split air-conditioning system under different operating frequencies and operating states with different load proportions; the oil return operation strategy comprises oil return opening degrees of electronic expansion valves corresponding to a plurality of indoor units in the multi-split air conditioning system respectively and operation parameters of oil return operation;
and determining an oil return operation strategy which is matched with the current operation frequency of the compressor and accords with a target oil return scheme of the current load proportion from the oil return information base.
7. An oil return control device applied to a multi-split air conditioning system, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the oil return control method according to any one of claims 1 to 6 when executing the program instructions.
8. The utility model provides a many online air conditioning system, is including setting up in outdoor side's compressor and a plurality of indoor sets, its characterized in that, many online air conditioning system still includes:
an oil level detection device configured to detect oil amount information of oil pressurized in the compressor;
the oil return control device of claim 7.
9. The multi-split air conditioning system as claimed in claim 8, wherein the oil level detecting device comprises:
a float assembly disposed within a cavity of the compressor, the float assembly configured to detect level data of engine oil pressurized within the compressor.
10. A storage medium storing program instructions, wherein the program instructions, when executed, perform the oil return control method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111603841.8A CN114543255A (en) | 2021-12-24 | 2021-12-24 | Oil return control method and device, multi-split air conditioning system and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111603841.8A CN114543255A (en) | 2021-12-24 | 2021-12-24 | Oil return control method and device, multi-split air conditioning system and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114543255A true CN114543255A (en) | 2022-05-27 |
Family
ID=81669100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111603841.8A Pending CN114543255A (en) | 2021-12-24 | 2021-12-24 | Oil return control method and device, multi-split air conditioning system and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114543255A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135973A (en) * | 2021-11-15 | 2022-03-04 | 珠海格力电器股份有限公司 | Multi-split air conditioner control method and device and multi-split air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010175189A (en) * | 2009-01-30 | 2010-08-12 | Daikin Ind Ltd | Air conditioner |
| CN107218741A (en) * | 2017-05-11 | 2017-09-29 | 青岛海尔空调电子有限公司 | A kind of multiple on-line system method for controlling oil return |
| CN110296546A (en) * | 2019-07-04 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | Method for controlling oil return, oil return control device and the air conditioner of multi-gang air-conditioner device |
| CN110360777A (en) * | 2018-04-09 | 2019-10-22 | 珠海格力电器股份有限公司 | Control method of refrigerant circulating system |
| CN111006352A (en) * | 2019-11-05 | 2020-04-14 | 宁波奥克斯电气股份有限公司 | Control method and control device of variable frequency air conditioner, storage medium and air conditioner |
| WO2021012769A1 (en) * | 2019-07-24 | 2021-01-28 | 南京天加环境科技有限公司 | Oil return control method for multi-split air conditioner |
| CN113669852A (en) * | 2020-04-30 | 2021-11-19 | 广东美的制冷设备有限公司 | Air conditioner, oil return control method of multi-split air conditioning system and storage medium |
-
2021
- 2021-12-24 CN CN202111603841.8A patent/CN114543255A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010175189A (en) * | 2009-01-30 | 2010-08-12 | Daikin Ind Ltd | Air conditioner |
| CN107218741A (en) * | 2017-05-11 | 2017-09-29 | 青岛海尔空调电子有限公司 | A kind of multiple on-line system method for controlling oil return |
| CN110360777A (en) * | 2018-04-09 | 2019-10-22 | 珠海格力电器股份有限公司 | Control method of refrigerant circulating system |
| CN110296546A (en) * | 2019-07-04 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | Method for controlling oil return, oil return control device and the air conditioner of multi-gang air-conditioner device |
| WO2021012769A1 (en) * | 2019-07-24 | 2021-01-28 | 南京天加环境科技有限公司 | Oil return control method for multi-split air conditioner |
| CN111006352A (en) * | 2019-11-05 | 2020-04-14 | 宁波奥克斯电气股份有限公司 | Control method and control device of variable frequency air conditioner, storage medium and air conditioner |
| CN113669852A (en) * | 2020-04-30 | 2021-11-19 | 广东美的制冷设备有限公司 | Air conditioner, oil return control method of multi-split air conditioning system and storage medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135973A (en) * | 2021-11-15 | 2022-03-04 | 珠海格力电器股份有限公司 | Multi-split air conditioner control method and device and multi-split air conditioner |
| CN114135973B (en) * | 2021-11-15 | 2023-02-03 | 珠海格力电器股份有限公司 | Multi-split air conditioner control method and device and multi-split air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112984721B (en) | Control method and device for air conditioner and air conditioner | |
| CN112880126A (en) | Method and device for detecting refrigerant quantity of refrigerating system and air conditioner | |
| EP3828473A1 (en) | Refrigerant flow control method and device for air conditioner and computer storage medium | |
| CN115111816A (en) | Method and device for detecting electronic expansion valve and storage medium | |
| CN114543255A (en) | Oil return control method and device, multi-split air conditioning system and storage medium | |
| CN115111718A (en) | Method and device for controlling air conditioner, air conditioner and storage medium | |
| CN114608128A (en) | Method and device for controlling temperature of air conditioner chip, air conditioner and storage medium | |
| CN113834184B (en) | Control method and device for air conditioner and server | |
| CN113339970B (en) | Method and device for detecting indoor temperature and intelligent air conditioner | |
| CN113357763B (en) | Method and device for detecting indoor temperature and intelligent air conditioner | |
| CN113357765B (en) | Method and device for detecting indoor temperature and intelligent air conditioner | |
| CN113465108A (en) | Control method and device for temperature compensation of air conditioner internal unit and air conditioner | |
| WO2024021670A1 (en) | Method and apparatus for controlling opening of expansion valve, air conditioner, and storage medium | |
| CN112178802B (en) | Method and device for determining installation position of air conditioner outdoor unit and air conditioner | |
| CN112050367A (en) | Control method and control device for defrosting of air conditioner and air conditioner | |
| CN116182369A (en) | Method and device for controlling air outlet temperature of air conditioner, air conditioner and storage medium | |
| CN115585547A (en) | Method and device for controlling dehumidifier, dehumidifier and storage medium | |
| CN114608145A (en) | Control method and control device for air conditioner, air conditioner and storage medium | |
| CN114646122A (en) | Method and device for controlling temperature of air conditioner, air conditioner and storage medium | |
| CN113357760A (en) | Method and device for detecting indoor temperature and intelligent air conditioner | |
| CN114383293B (en) | Method and device for controlling air conditioner, air conditioner and storage medium | |
| CN115183383B (en) | Method and device for controlling air conditioning system, air conditioning system and storage medium | |
| CN118729519A (en) | Control method and control device for air conditioner, air conditioner and storage medium | |
| CN113091213B (en) | Method and device for defrosting of air conditioner and air conditioner | |
| CN112628966A (en) | Control method and device for air conditioner and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |