CN110857809A - Air conditioner and oil return control method thereof - Google Patents
Air conditioner and oil return control method thereof Download PDFInfo
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- CN110857809A CN110857809A CN201810975978.8A CN201810975978A CN110857809A CN 110857809 A CN110857809 A CN 110857809A CN 201810975978 A CN201810975978 A CN 201810975978A CN 110857809 A CN110857809 A CN 110857809A
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- air conditioner
- oil return
- return operation
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/67—Switching between heating and cooling modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
Abstract
The invention relates to the field of air conditioners, and aims to solve the problem of return oil deposition of lubricating oil of a compressor in a pipeline in the conventional air conditioner. To this end, the invention provides an air conditioner and an oil return control method thereof, wherein the oil return control method of the air conditioner comprises the following steps: acquiring the time length of the air conditioner running in a refrigeration mode; and under the condition that the time length reaches a first preset time length, switching the air conditioner to an oil return operation link. Since the cooling mode is a main scene for the generation of the oil return deposition problem of the air conditioner, the oil return deposition problem can be solved in time by processing the oil return deposition problem of the air conditioner with the accumulated time of the air conditioner in the cooling mode as a reference.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioner and an oil return control method thereof.
Background
During operation of the air conditioner, most of the lubricant oil of the compressor carried out by the refrigerant returns to the compressor along with the refrigerant, but a small part of the lubricant oil may be carried into the machine body (such as a pipeline of an evaporator) along with the refrigerant from the exhaust pipe opening. When the air conditioner operates in a cooling mode, the temperature of the evaporator is relatively low, so that the viscosity of the oil is increased, and at the moment, the lubricating oil of the compressor is not easy to return to the compressor and is easy to remain in the pipeline of the evaporator, and particularly, the phenomenon that the lubricating oil remains in the pipeline of the evaporator when the compressor operates at a low frequency is more obvious. And the lubricating oil deposit that the refrigerant was taken out can lead to the compressor because the operation lacks oil and the phenomenon that is worn and torn or even burns out in the pipeline, and in addition, lubricating oil deposit also can lead to the heat exchange efficiency greatly reduced of evaporimeter in the pipeline of evaporimeter, influences heat transfer effect.
As an improvement, there is a method of introducing oil back into the pipeline by adding an oil return bend, etc. to guide the oil back to the compressor along with the refrigerant. However, although the above-described oil return is promoted to some extent by the structural optimization, the problem of oil return deposition in the piping is not fundamentally solved.
Accordingly, there is a need in the art for a new oil return control method that addresses the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem of oil return deposition in a pipeline of lubricating oil of a compressor in the existing air conditioner, in one aspect, the present invention provides an oil return control method for an air conditioner, the method including: acquiring the time length of the air conditioner running in a refrigeration mode; and under the condition that the time length reaches a first preset time length, switching the air conditioner to an oil return operation link.
When the air conditioner runs under the condition of the refrigeration mode for a long time, the temperature of the refrigerant in the evaporator is lower, and the lubricating viscosity is increased, so that oil return is more difficult, and the problem of oil return deposition of lubricating oil in a pipeline is more obvious. Therefore, the oil return problem of the compressor can be effectively treated by determining whether to start the oil return operation link by taking the time length of the air conditioner in the refrigeration mode as a reference. Such as, but not limited to, a single cooling time when the air conditioner is in the cooling mode, or an accumulated cooling time period within a set time interval. Taking the accumulated cooling time as an example, for different seasons, regions, and other factors, the corresponding preset time may be set to be the same or different.
In a preferred technical scheme of the method, the time length is the accumulated time length of the air conditioner running in the refrigeration mode between two adjacent oil return operation links.
The accumulated time of the refrigeration mode can accurately reflect the oil return requirement, and the oil return requirement can be more accurately reflected by clearing the running time in the refrigeration mode before the last oil return running link. The accumulated time length can be detected and calculated in real time, and can also be periodically settled. The former is more accurate and the latter reduces the operating load. For example, the first preset time period is usually within a range of 10-15 h. If the air conditioner is in the condition of long-term low-frequency operation (for example, below 40 hz) of the compressor in a use scene, the first preset time length can be set to 10h, and if the operation frequency of the compressor is higher or medium, the first preset time length can be properly lengthened but not too long, and if the first preset time length is more than 15h, the air conditioner cannot timely treat the problem of oil return deposition, so that the overall performance of the air conditioner is affected. For example, the first preset time is 10 hours, and assuming that the cumulative time detected during the starting is 9.5 hours and the starting is in the refrigeration mode, the former is detected and calculated in real time, so that the air conditioner is switched to an oil return operation link for oil return deposition treatment after the starting is performed for half an hour. The latter is a settlement mode of detecting the air conditioner once only at the starting, so that the accumulated time length of the latter is based on the accumulated time length detected at the starting time of the time being 9.5h, and the oil return deposition treatment is not carried out in the whole running process.
In addition, the accumulated time corresponding to each oil return operation link can be recorded and stored, so that subsequent analysis can be facilitated. If the deviation exists, the oil return operation parameters of the oil return operation link can be correspondingly corrected. For example, as the service life of the air conditioner is increased, the operation time of the oil return operation link is properly prolonged or repeated oil return operation is adopted.
In a preferred technical solution of the above method, the step of "switching the air conditioner to the oil return operation link" further includes: making the air conditioner in a heating mode; and switching the air conditioner to an oil return operation parameter corresponding to the oil return operation link.
In the heating mode, the temperature of the refrigerant in the evaporator is increased, so that the viscosity of the lubricating oil deposited in the evaporator pipe group is greatly reduced, and the lubricating oil can return to the compressor along with the refrigerant more easily. And the switching of the cooling/heating mode belongs to the existing function of the air conditioner, so that no additional component is needed, such as an auxiliary heating component specially configured for solving the problem of return oil deposition, and the like.
In a preferred technical solution of the above method, the air conditioner includes an outdoor unit and an indoor unit, the outdoor unit and the indoor unit are respectively provided with an outdoor motor and an indoor motor, and the step of switching the air conditioner to an oil return operation parameter corresponding to the oil return operation mode includes: switching the frequency of the compressor to an oil return operation frequency; stopping the outdoor motor and the indoor motor; and the oil return running frequency is not less than the preset frequency.
Through the setting, the heat of the air conditioner can be concentrated on solving the problem of oil return deposition under the condition that the heat is not conveyed to the indoor environment, and the treatment efficiency of the oil return deposition problem is improved. And on the basis of the heating mode of the air conditioner, the compressor is operated at a higher frequency, so that the flow of the refrigerant can be effectively promoted, the flow speed of the refrigerant is accelerated, and the problem of deposited oil return is maximally promoted to be solved. The oil return operation frequency can be directly set under the condition that the oil return operation frequency is not less than the preset frequency, or a higher preset frequency can be set, and then the oil return operation frequency is determined according to the preset frequency. The preset frequency may be determined according to a large amount of historical data, experimental data, experience of the inventor, and the like, for example, the oil return operation frequency is about 80% of the rated frequency of the compressor.
In a preferred technical solution of the above method, the outdoor unit includes an outdoor heat exchanger, the indoor unit includes an indoor heat exchanger, the compressor, the outdoor heat exchanger, and the indoor heat exchanger form a closed loop, a throttle valve is disposed on the closed loop, an air deflector is disposed at an air outlet of the indoor unit, and the step of "switching the air conditioner to an oil return operation parameter corresponding to the oil return operation mode" further includes: keeping the throttle valve at the set opening degree continuously; and/or to maintain the deflector in a set orientation.
The constant throttle opening ensures heat stability in the evaporator. Because the motor is in a halt state temporarily (outdoor and indoor) when the problem of return oil deposition is solved, treated fresh air does not need to be provided for the indoor environment, and the air deflector does not need to rotate continuously like in a cooling/heating mode, so that the air deflector is in a fixed position, for example, the position of the air deflector is adjusted to the minimum opening.
In a preferred embodiment of the above method, before, simultaneously with, or after the step of "switching the air conditioner to the oil return operation link", the method includes: and recording the previous operation mode of the air conditioner before switching to the oil return operation link.
In a preferred technical solution of the above method, after the step of "switching the air conditioner to the oil return operation link", the method includes: judging whether the condition for enabling the air conditioner to exit the oil return operation link is met or not; and under the condition that the condition is met, the air conditioner is caused to exit an oil return operation link.
In a preferred technical solution of the above method, at the same time or after the step of "causing the air conditioner to exit the oil return operation link", the method includes: and enabling the air conditioner to operate according to the prior operation mode.
In consideration of the overall performance of the air conditioner, the air conditioner needs to be switched to an oil outlet operation link in time. After the air conditioner exits the oil return operation link, the air conditioner is directly switched to the prior operation mode, so that the use experience of a user is guaranteed on the basis of effectively solving the problem of oil return deposition of the air conditioner.
In a preferred technical solution of the above method, "when the condition is satisfied, the air conditioner is caused to exit the oil return operation link" the method includes: and after the air conditioner is switched to the oil return control link for a second preset time, the air conditioner is made to exit the oil return operation link.
The second preset time length is required to ensure that the return oil deposition can be effectively processed on one hand, and on the other hand, the processing of the return oil deposition is required to be ensured to influence the user experience as little as possible, namely, the air conditioner can be switched back to the previous operation mode as soon as possible. For example, the second preset time period is usually within the range of 5-6 min. Preferably, the second preset time length, the heating mode and the oil return operation frequency are combined and matched more scientifically and reasonably, and requirements of oil return deposition treatment and user experience can be better met.
The invention also provides an air conditioner which comprises a controller, wherein the controller is used for executing the oil return control method of the air conditioner in any one of the above aspects.
It should be noted that, the air conditioner has all the technical effects of the oil return control method described above, and details are not described again.
Drawings
An oil return control method of an air conditioner according to the present invention will be described with reference to the accompanying drawings in conjunction with a wall-mounted air conditioner. In the drawings:
fig. 1 is a flow chart illustrating an oil return control method of an air conditioner according to the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. Any changes which come within the scope of the invention are intended to be covered by the following claims without departing from the principles of the invention. For example, although the oil return control method of the air conditioner is described by taking a wall-mounted air conditioner as an example, the oil return control method of the present invention is also suitable for a floor type air conditioner, a ceiling type air conditioner, and the like. For another example, although both T1 and T2 are fixed values in the present embodiment, it is obvious that this is only an example, and those skilled in the art can adjust the values as needed to suit specific applications, such as shortening T1, lengthening T2, etc. as the service time of the air conditioner increases.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, procedures, components, and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention. The wall-mounted air conditioner comprises an outdoor unit and an indoor unit, wherein an outdoor heat exchanger (generally called an evaporator), an outdoor motor, an outdoor fan and a compressor are mainly arranged in a casing of the outdoor unit, a heat dissipation grating is arranged on the casing, for example, in the case of heating, the outdoor motor rotates to drive the outdoor fan to rotate, and after the cold energy of the outdoor heat exchanger is transferred to air, the air carrying the cold energy is discharged out of the outdoor environment through negative pressure generated by the outdoor fan. The indoor heat exchanger, the outdoor heat exchanger and the compressor are connected through pipelines to form a closed loop, and air conditioning is realized through circulation of a refrigerant in the pipelines. The closed loop is provided with a throttle valve to realize the adjustment of the refrigerant (refrigerant). The indoor unit has air inlet and outlet, and fresh air from indoor environment is fed via the air inlet to the indoor space and treated before being delivered via the air outlet. An air deflector is arranged at the air outlet to adjust the air supply amount and the air supply direction. For example, the air deflector may be a single plate or a louvered structure of a plurality of plates.
After filling the oil circuit of the compressor with lubricating oil, it may appear as refrigerant entering the line and depositing anywhere in the closed loop, as in the line of the evaporator mentioned in the background. And the deposition of the lubricating oil in the piping may cause problems of oil shortage of the compressor and reduction of heat exchange efficiency of the evaporator. To this end, the air conditioner of the present invention is further provided with a controller, and the controller is mainly used for executing the following oil return control method of the air conditioner. The oil return control method is mainly used for solving the problem of oil return deposition. If the controller can be a separate control module or a sub-module integrated on the existing control module of the air conditioner, the skilled person can flexibly adjust the controller according to the actual situation.
Referring to fig. 1, fig. 1 is a flow chart illustrating an oil return control method of an air conditioner according to the present invention. As shown in fig. 1, the oil return control method of the air conditioner of the present invention mainly includes the following steps:
s10, determining the accumulated time length of the air conditioner running in the cooling mode;
s20, judging whether the accumulated time length is larger than or equal to a preset time length T1, if T1 is a constant, if yes, returning to S10, and if not, turning to S30;
s30, judging whether the current operation mode of the air conditioner is a heating mode, if so, directly switching to S40, and if not, switching to the heating mode and then switching to S40;
and S40, starting an oil return operation link, wherein the oil return operation link is started by mainly configuring oil return operation parameters corresponding to the oil return operation link for the air conditioner, and the oil return operation parameters mainly comprise: keeping the compressor at a high oil return operation frequency, stopping the operation of the motors (indoor and outdoor), adjusting the air deflector to a minimum opening degree, and adjusting the throttle valve to a fixed opening degree, such as 70%;
s50, judging whether the time of the air conditioner entering the oil return operation link is longer than the preset time length T2, if not, continuing to operate S50; if yes, go to S60;
and S60, exiting the oil return operation link, and switching the air conditioner to the previous operation mode before entering the oil return operation link. Obviously, the mode can be switched to other modes or the shutdown and restart can be selected according to actual requirements.
It should be noted that the heating mode in S30 is mainly to reverse the refrigerant cycle, and S40 includes the step of adjusting (indoor, outdoor) motors, etc., so S30 and S40 can be performed in synchronization with each other or in a reversed order. For example, the air conditioner is first switched to a heating mode, if the heating mode is a preset operation parameter, then the preset operation parameter is properly adjusted by using the oil return operation parameter as a standard, if the rotation speed of the (indoor, outdoor) motor in the preset operation parameter is adjusted to zero.
In a preferred scheme of the invention, the problem of return oil deposition of the air conditioner is solved by taking the accumulated time length of the air conditioner in the cooling mode as a reference. Since the cooling mode is the main scene of the air conditioner for the problem of oil return deposition, such judgment can solve the problem of oil return deposition in time. Meanwhile, in the oil return operation link, the air conditioner is kept in a refrigeration mode, and a higher operation frequency is set for the compressor, so that on one hand, the viscosity of lubricating oil deposited in an evaporator pipeline is reduced due to the temperature rise of a refrigerant in the evaporator, and on the other hand, the flow speed of the refrigerant in a closed loop is accelerated due to the high-frequency operation of the compressor. Thus, the reduced viscosity lubricant plus the fast flowing carrier carrying the lubricant makes it easier for the lubricant to return to the compressor with the refrigerant.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. An oil return control method of an air conditioner, the method comprising:
acquiring the time length of the air conditioner running in a refrigeration mode;
and under the condition that the time length reaches a first preset time length, switching the air conditioner to an oil return operation link.
2. The method of claim 1, wherein the duration is an accumulated duration of operation of the air conditioner in the cooling mode between two adjacent oil return operation links.
3. The method of claim 2, wherein the step of switching the air conditioner to the return operation link further comprises:
making the air conditioner in a heating mode; and is
And switching the air conditioner to an oil return operation parameter corresponding to the oil return operation link.
4. The method of claim 3, wherein the air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit and the indoor unit are respectively provided with an outdoor motor and an indoor motor, and the step of switching the air conditioner to the oil-return operation parameter corresponding to the oil-return operation mode comprises the steps of:
switching the frequency of the compressor to an oil return operation frequency;
stopping the outdoor motor and the indoor motor;
and the oil return running frequency is not less than the preset frequency.
5. The method of claim 4, wherein the outdoor unit comprises an outdoor heat exchanger, the indoor unit comprises an indoor heat exchanger, the compressor, the outdoor heat exchanger and the indoor heat exchanger form a closed loop, a throttle valve is arranged on the closed loop, a wind deflector is arranged at an air outlet of the indoor unit, and the step of switching the air conditioner to an oil return operation parameter corresponding to the oil return operation mode further comprises:
keeping the throttle valve at the set opening degree continuously; and/or
And enabling the air deflector to be continuously positioned at a set orientation.
6. The method according to any one of claims 3 to 5, wherein before, simultaneously with or after the step of switching the air conditioner to the oil return operation link, the method comprises:
and recording the previous operation mode of the air conditioner before switching to the oil return operation link.
7. The method of claim 6, wherein after the step of switching the air conditioner to the return run link, the method comprises:
judging whether the condition for enabling the air conditioner to exit the oil return operation link is met or not;
and under the condition that the condition is met, the air conditioner is caused to exit an oil return operation link.
8. The method of claim 7, wherein, concurrently with or after the step of removing the air conditioner from the return run mode, the method comprises:
and enabling the air conditioner to operate according to the prior operation mode.
9. The method of claim 7, wherein causing the air conditioner to exit an oil return operation link if the condition is satisfied comprises:
and after the air conditioner is switched to the oil return control link for a second preset time, the air conditioner is made to exit the oil return operation link.
10. An air conditioner characterized by comprising a controller for executing the oil return control method of the air conditioner according to any one of claims 1 to 9.
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| CN201810975978.8A CN110857809A (en) | 2018-08-24 | 2018-08-24 | Air conditioner and oil return control method thereof |
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| CN201810975978.8A CN110857809A (en) | 2018-08-24 | 2018-08-24 | Air conditioner and oil return control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984867A (en) * | 2021-03-30 | 2021-06-18 | 宁波奥克斯电气股份有限公司 | Air conditioner heating oil return control method and device and air conditioner |
| CN113483454A (en) * | 2021-07-15 | 2021-10-08 | 青岛海尔空调器有限总公司 | Method for recovering oil stain in pipe of indoor unit |
| CN114198859A (en) * | 2021-12-10 | 2022-03-18 | 珠海格力电器股份有限公司 | Compressor oil return control method and air conditioner |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7832220B1 (en) * | 2003-01-14 | 2010-11-16 | Earth To Air Systems, Llc | Deep well direct expansion heating and cooling system |
| CN104089380A (en) * | 2014-07-31 | 2014-10-08 | 广东志高空调有限公司 | Ultralow-temperature air conditioner refrigeration method and device |
| CN106642771A (en) * | 2016-11-29 | 2017-05-10 | 珠海格力电器股份有限公司 | Oil return control method and device of refrigeration house multi-connected unit and refrigeration house multi-connected unit |
| CN107490224A (en) * | 2017-09-22 | 2017-12-19 | Tcl空调器(中山)有限公司 | The control method of heat-exchange system and heat-exchange system |
| CN108224850A (en) * | 2017-12-29 | 2018-06-29 | 广东美的制冷设备有限公司 | Method for controlling oil return, device, air conditioner and computer readable storage medium |
| CN108351131A (en) * | 2015-09-24 | 2018-07-31 | 开利公司 | Control the system and method that the oil stream in refrigeration system is moved |
-
2018
- 2018-08-24 CN CN201810975978.8A patent/CN110857809A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7832220B1 (en) * | 2003-01-14 | 2010-11-16 | Earth To Air Systems, Llc | Deep well direct expansion heating and cooling system |
| CN104089380A (en) * | 2014-07-31 | 2014-10-08 | 广东志高空调有限公司 | Ultralow-temperature air conditioner refrigeration method and device |
| CN108351131A (en) * | 2015-09-24 | 2018-07-31 | 开利公司 | Control the system and method that the oil stream in refrigeration system is moved |
| CN106642771A (en) * | 2016-11-29 | 2017-05-10 | 珠海格力电器股份有限公司 | Oil return control method and device of refrigeration house multi-connected unit and refrigeration house multi-connected unit |
| CN107490224A (en) * | 2017-09-22 | 2017-12-19 | Tcl空调器(中山)有限公司 | The control method of heat-exchange system and heat-exchange system |
| CN108224850A (en) * | 2017-12-29 | 2018-06-29 | 广东美的制冷设备有限公司 | Method for controlling oil return, device, air conditioner and computer readable storage medium |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984867B (en) * | 2021-03-30 | 2022-08-09 | 宁波奥克斯电气股份有限公司 | Air conditioner heating oil return control method and device and air conditioner |
| CN112984867A (en) * | 2021-03-30 | 2021-06-18 | 宁波奥克斯电气股份有限公司 | Air conditioner heating oil return control method and device and air conditioner |
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