CN109424547B - A kind of oil temperature heating tape control method and air conditioner - Google Patents
A kind of oil temperature heating tape control method and air conditioner Download PDFInfo
- Publication number
- CN109424547B CN109424547B CN201710752347.5A CN201710752347A CN109424547B CN 109424547 B CN109424547 B CN 109424547B CN 201710752347 A CN201710752347 A CN 201710752347A CN 109424547 B CN109424547 B CN 109424547B
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- temperature
- heating tape
- environment temperature
- preset
- oil
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of oil temperature heating tape control method and device, the control method includes: to detect delivery temperature Tp, outdoor environment temperature Tw, the indoor environment temperature Tn of exhaust pipe；Judge whether the difference of Tw and Tn is less than preset temperature T1, and whether the difference of Tp and Tw is less than preset temperature T2；When meeting Tw-Tn < T1 and Tp-Tw < T2, controls the oil temperature heating tape and be powered；In oil temperature heating tape is powered, Tp, Tw, Tn are continued to test；Judge whether Tw-Tn >=T3 or Tp-Tw >=T4；When meeting Tw-Tn >=T3 or Tp-Tw >=T4, then the oil temperature heating tape power-off is controlled, a regulation process is completed.It is realized by above-mentioned control method and is opened on demand, reduce the unnecessary electric energy loss of air conditioner, reduce its standby power, improve energy saving, and then extend the service life of oil temperature heating tape.
Description
Technical field
The present invention relates to air conditioner technical fields, are specifically related to a kind of oil temperature heating tape control method and air conditioner.
Background technique
The air conditioner of the prior art, is possible to a large amount of refrigerants occur after the compressor long period out of service to be collected at
Motor spindle is compressed, when compressor start, compressor will suck large amount of liquid refrigerant and generate hydraulic compression, additionally, due to a large amount of cold
Matchmaker also results in lubricating oil in compression motor spindle and is diluted, and causes compressor lubrication bad.Hydraulic compression and insufficient lubrication can all be made
At compressor injury, therefore in order to avoid the refrigerant aggregation of bottom when compressor shutdown, generally all increase oil in compression motor spindle
Warm heating tape.When compressor is out of service, oil temperature heating tape obtain it is electric, to compression motor spindle heat, prevent liquid refrigerants
It is gathered in compression motor spindle.
Conventional oil temperature heating tape control method is as follows at present:
When compressor start, oil temperature heating tape is closed, and when compressor is closed, oil temperature heating tape is opened.
The above method has the following problems:
1, compressor has just closed and in latter section of long period, compressor temperature certain temperature higher than outdoor environment temperature
When, liquid refrigerants will not be collected at compression motor spindle, and opening oil temperature heating tape at this time leads to energy waste；
2, when outdoor temperature is crossed higher than room temperature, liquid refrigerants, which can gather machine indoors, will not be collected at compressor bottom
Portion, opening oil temperature heating tape at this time leads to energy waste；
3, when compressor is heated to certain temperature higher than outdoor environment temperature by oil temperature heating tape, liquid refrigerants will not be
Compression motor spindle gathers, and opening oil temperature heating tape at this time leads to energy waste；
4, oil temperature heating tape service life is greatly decreased, and after air conditioner uses 2~3 years, oil temperature heating tape may fail,
It is then turned on after leading to the compressor shutdown long period, the phenomenon that hydraulic compression machine and lubricating oil dilution occurs, compressor is caused to shift to an earlier date
Damage.
In view of this, the present invention is specifically proposed.
Summary of the invention
The present invention provides a kind of oil temperature heating tape control methods, after closing by compressor, detect delivery temperature, outdoor
Environment temperature, indoor environment problem control the unlatching of oil temperature heating tape by the difference between them, realize and open on demand,
Under the premise of meeting the not hydrops requirement of compression motor spindle, reduces the unnecessary electric energy loss of air conditioner, reduce its standby function
Rate improves its energy saving, and then extends the service life of oil temperature heating tape.
To achieve the above object, the invention adopts the following technical scheme:
A kind of oil temperature heating tape control method, the oil temperature heating tape control method include:
S1: the delivery temperature Tp, outdoor environment temperature Tw, indoor environment temperature Tn of compressor exhaust pipe are detected；
S2: judge whether the outdoor environment temperature Tw and the difference of the indoor environment temperature Tn are less than preset temperature
T1, and whether the difference of the delivery temperature Tp of the compressor exhaust pipe and outdoor environment temperature Tw is less than preset temperature
T2, if so, S3 is thened follow the steps, if not, thening follow the steps S1；
S3: it controls the oil temperature heating tape and is powered；
S4: in the oil temperature heating tape is powered, the delivery temperature Tp of the compressor exhaust pipe, the room are continued to test
External environment temperature Tw, the indoor environment temperature Tn；
S5: judge whether the difference of the outdoor environment temperature Tw and indoor environment temperature Tn is more than or equal to default temperature
It is pre- whether the difference of the delivery temperature Tp and the outdoor environment temperature Tw of degree T3 or the compressor exhaust pipe are more than or equal to
If temperature T4, if so, S6 is thened follow the steps, if not, thening follow the steps S4；
S6: the oil temperature heating tape power-off is controlled, the oil temperature heating tape once electrification/power-off regulation process is completed.
Further, the preset temperature T3 is greater than the preset temperature T1, and the preset temperature T4 is greater than the default temperature
Spend T2.
Further, the outdoor environment temperature Tw can be replaced with outdoor coil temperature, the indoor environment temperature Tn
It can be replaced with indoor coil pipe.
A kind of oil temperature heating tape control device, oil temperature heating tape control device include:
Detection module, for detecting delivery temperature Tp, the outdoor environment temperature Tw, indoor environment temperature of compressor exhaust pipe
Tn；Judgment module, for judging the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn, the compressor air-discharging
The difference of the delivery temperature Tp of pipe and the outdoor environment temperature Tw export judging result compared with preset temperature size；
Control module is less than preset temperature for the difference as the outdoor environment temperature Tw and indoor environment temperature Tn
T1, and the difference of the delivery temperature Tp of the compressor exhaust pipe and the outdoor environment temperature Tw be less than preset temperature T2 when, control
The oil temperature heating tape is made to be powered；It is preset when the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn are more than or equal to
When temperature T3 or the difference of the delivery temperature Tp of the compressor exhaust pipe and outdoor environment temperature Tw is more than or equal to default
When temperature T4, the oil temperature heating tape power-off is controlled；
Preferably, the preset temperature T3 is greater than the preset temperature T1, and the preset temperature T4 is greater than the default temperature
Spend T2.
Further, the outdoor environment temperature Tw can be replaced with outdoor coil temperature, the indoor environment temperature Tn
It can be replaced with indoor coil pipe.
The present invention also provides a kind of air conditioner, the air conditioner includes above-mentioned oil temperature heating tape control device.
Beneficial effects of the present invention:
1, by detecting delivery temperature Tp, outdoor environment temperature Tw, the indoor environment temperature Tn of compressor exhaust pipe, pass through
Certain rule is known that when the compressor is shut down, the position of air conditioner hydrops；
2, according to the temperature of detection determine compression motor spindle there is hydrops when, in time to oil temperature heating tape be powered, will accumulate
Liquid is evaporated, and avoids compression motor spindle hydrops；
3, when compressing the evaporation completion of motor spindle hydrops, oil temperature heating tape is powered off in time, it is energy saving, extend oil temperature and adds
The service life in the torrid zone and the service life of compressor.
Detailed description of the invention
Fig. 1 is the flow chart of oil temperature heating tape of the present invention control method；
Fig. 2 is the structural block diagram of oil temperature heating tape of the present invention control device.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
With reference to the accompanying drawings come describe the oil temperature heating tape control method proposed according to embodiments of the present invention, control device with
And air conditioner.
Fig. 1 is the flow chart of oil temperature heating tape of the present invention control method；As shown in Figure 1, the oil temperature heating tape control method
The following steps are included:
S1: the delivery temperature Tp, outdoor environment temperature Tw, indoor environment temperature Tn of compressor exhaust pipe are detected；
S2: judge whether the outdoor environment temperature Tw and the difference of the indoor environment temperature Tn are less than preset temperature
T1, and whether the difference of the delivery temperature Tp of the compressor exhaust pipe and outdoor environment temperature Tw is less than preset temperature
T2, if so, S3 is thened follow the steps, if not, thening follow the steps S1；
S3: it controls the oil temperature heating tape and is powered；
S4: in the oil temperature heating tape is powered, the delivery temperature Tp of the compressor exhaust pipe, the room are continued to test
External environment temperature Tw, the indoor environment temperature Tn；
S5: judge whether the difference of the outdoor environment temperature Tw and indoor environment temperature Tn is more than or equal to default temperature
It is pre- whether the difference of the delivery temperature Tp and the outdoor environment temperature Tw of degree T3 or the compressor exhaust pipe are more than or equal to
If temperature T4, if so, S6 is thened follow the steps, if not, thening follow the steps S4；
S6: the oil temperature heating tape power-off is controlled, the oil temperature heating tape once electrification/power-off regulation process is completed.
By above step it is found that when compressor is closed, and oil temperature heating tape is opened not in time, detect the compression first
The delivery temperature Tp of machine exhaust pipe, the outdoor environment temperature Tw, the indoor environment temperature Tn, when the outdoor environment temperature
When Tw is higher than the indoor environment temperature Tn certain value, i.e., the difference of described outdoor environment temperature Tw and the indoor environment temperature Tn
When greater than the preset temperature, liquid refrigerants be will accumulate in indoor evaporator, will not be gathered in compression motor spindle；When the pressure
When the delivery temperature Tp of contracting machine exhaust pipe is higher than the outdoor environment temperature Tw certain value, i.e., the exhaust of the described compressor exhaust pipe
When the difference of temperature Tp and the outdoor environment temperature Tw are greater than the preset temperature, liquid refrigerants will accumulate in condenser, gas-liquid
In the components such as separator, compression motor spindle will not be gathered in；When illustrating that oil temperature heating tape is without heat treatment at this time, liquid is cold
Matchmaker will not be gathered in compression motor spindle, therefore control oil temperature heating tape and be in close state, and reduce unnecessary electric energy loss, drop
The standby power of low air conditioner improves its energy saving.Only as the outdoor environment temperature Tw and the indoor environment temperature Tn
Difference be less than the preset temperature T1, and the difference of the delivery temperature Tp of the compressor exhaust pipe and the outdoor environment temperature Tw
When less than the preset temperature T2, liquid refrigerants starts to be gathered in compression motor spindle, to prevent liquid refrigerants to be gathered in pressure
Contracting motor spindle, therefore control oil temperature heating tape and be powered.After oil temperature heating tape is powered, the exhaust of the compressor exhaust pipe is continued to test
Temperature Tp, the outdoor environment temperature Tw, the indoor environment temperature Tn, as the outdoor environment temperature Tw and the indoor ring
The difference of border temperature Tn be more than or equal to the preset temperature T3 when or the compressor exhaust pipe delivery temperature Tp and the room
When the difference of external environment temperature Tw is more than or equal to the preset temperature T4, then the oil temperature heating tape power-off is controlled, the oil is completed
Warm heating tape once electrification/power-off regulation process, the liquid refrigerants for compressing motor spindle at this time all evaporate completely.It can be seen that
It is in due course power on/off that oil temperature heating tape is realized by the above method, under the premise of guaranteeing to compress motor spindle not hydrops, is reduced
The unnecessary electric energy loss of air conditioner, reduces its standby power, improves its energy saving, solve problem of the prior art.
It should be noted that the preset temperature T1 can be 3-10 DEG C, the preset temperature T2 is 10-20 DEG C, described
Preset temperature T3 can be 5-10 DEG C, and the preset temperature T4 is 15-25 DEG C.Specifically, the preset temperature T1 is 3 DEG C, institute
Stating preset temperature T2 is 10 DEG C, and the preset temperature T3 is 5 DEG C, and the preset temperature T4 is 20 DEG C, detects the compressor row
The delivery temperature Tp of tracheae, the outdoor environment temperature Tw, the indoor environment temperature Tn, as the outdoor environment temperature Tw-
Indoor environment temperature Tn < 3 DEG C, and outdoor environment temperature Tw < 10 DEG C described in the delivery temperature Tp- of the compressor exhaust pipe
When, it controls the oil temperature heating tape and is powered, begin to warm up.In the galvanization of the oil temperature heating tape, when meeting the outdoor ring
Outdoor environment temperature described in the delivery temperature Tp- of indoor environment temperature Tn >=5 DEG C described in the temperature Tw- of border or the compressor exhaust pipe
When spending Tw >=20 DEG C, the oil temperature heating tape power-off is controlled, stops heating, completes the oil temperature heating tape once electrification/power-off
Regulation process.The above process after completing once electrification/power-off regulation process, can continue to test the compressor with circulating repetition
The delivery temperature Tp of exhaust pipe, the outdoor environment temperature Tw, the indoor environment temperature Tn, carry out the oil temperature heating tape
Power on/off processing.
Preferably, T3-T1=2-8 DEG C, T4-T2=4-10 DEG C, the galvanization of the oil temperature heating tape is reasonably controlled,
Avoid compression motor spindle hydrops.
In practical applications, it can be used for reflecting the concrete kind of the outdoor environment temperature Tw, the indoor environment temperature Tn
There are many types, such as the outdoor environment temperature Tw outdoor coil temperature, the indoor environment temperature Tn indoor coil temperature
Degree is substituted.
Based on the same inventive concept, a kind of oil temperature heating tape control device and its air-conditioning are additionally provided in the embodiment of the present invention
Device, as described in the following examples.The principle and its control method phase solved the problems, such as due to oil temperature heating tape control device
Seemingly, therefore the implementation of oil temperature heating tape control device may refer to the implementation of oil temperature heating tape control method, repeat
Place repeats no more.Used below, the software and/or hardware of predetermined function may be implemented in term " unit " or " module "
Combination.Although device described in following embodiment is preferably realized with software, hardware or software and hardware
The realization of combination is also that may and be contemplated.Fig. 2 is the structural block diagram of oil temperature heating tape of the present invention control device, such as Fig. 2 institute
Show, the control device includes: detection module 1, judgment module 2, control module 3.
Detection module 1, for detecting the delivery temperature Tp, outdoor environment temperature Tw, indoor environment temperature of compressor exhaust pipe
Spend Tn；Judgment module 2, for judging the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn, the compressor
The difference of the delivery temperature Tp of exhaust pipe and the outdoor environment temperature Tw export judging result compared with preset temperature size；
Control module 3 is less than default temperature for the difference as the outdoor environment temperature Tw and indoor environment temperature Tn
T1 is spent, and when the difference of the delivery temperature Tp of the compressor exhaust pipe and the outdoor environment temperature Tw are less than preset temperature T2,
The oil temperature heating tape is controlled to be powered；When the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn are more than or equal in advance
If when temperature T3 or the difference of the delivery temperature Tp of the compressor exhaust pipe and outdoor environment temperature Tw is more than or equal in advance
If when temperature T4, controlling the oil temperature heating tape power-off；
Specifically, the preset temperature T1 is 3 DEG C, the preset temperature T2 is 10 DEG C, and the preset temperature T3 is 5 DEG C,
The preset temperature T4 is 20 DEG C, detects the delivery temperature Tp, described of the compressor exhaust pipe by the detection module 1 first
Outdoor environment temperature Tw, the indoor environment temperature Tn；It is calculated by the judgment module 2 and judges the outdoor environment temperature
Whether the difference of Tw and the indoor environment temperature Tn are less than the preset temperature T1, and the delivery temperature of the compressor exhaust pipe
Whether the difference of the Tp and outdoor environment temperature Tw is less than the preset temperature T2.If it is, sending a control signal to institute
Control module 3 is stated, the control module 3 controls the oil temperature heating tape and is powered；It is described in the galvanization of the oil temperature heating tape
Detection module 1 continues to test the delivery temperature Tp of the compressor exhaust pipe, the outdoor environment temperature Tw, the indoor environment
Temperature Tn calculates by the judgment module 2 and judges the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn
Whether the delivery temperature Tp and the outdoor environment temperature of the preset temperature T3 or the compressor exhaust pipe are more than or equal to
Whether the difference of Tw is more than or equal to the preset temperature T4.If meeting one of above-mentioned condition, send a control signal to described
Control module 3, the control module 3 control the oil temperature heating tape power-off；In air-conditioning use process repeatedly, institute is completed
The power on/off process of oil temperature heating tape is stated, to realize the protection to compressor.
The embodiments of the present invention also provide a kind of air conditioners comprising the control device of above-mentioned oil temperature heating tape.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of oil temperature heating tape control method, it is characterised in that: the oil temperature heating tape control method includes:
S1: delivery temperature Tp, outdoor environment temperature Tw, the indoor environment temperature Tn of compressor exhaust pipe are detected respectively；
S2: judging whether the outdoor environment temperature Tw and the difference of the indoor environment temperature Tn are less than preset temperature T1, and
Whether the difference of the delivery temperature Tp of the compressor exhaust pipe and outdoor environment temperature Tw is less than preset temperature T2, if
It is to then follow the steps S3, if not, thening follow the steps S1；
S3: it controls the oil temperature heating tape and is powered；
S4: in the oil temperature heating tape is powered, delivery temperature Tp, the outdoor ring of the compressor exhaust pipe are continued to test
Border temperature Tw, the indoor environment temperature Tn；
S5: judge whether the outdoor environment temperature Tw and the difference of the indoor environment temperature Tn are more than or equal to preset temperature
It is default whether the difference of the delivery temperature Tp of the T3 or the compressor exhaust pipe and outdoor environment temperature Tw is more than or equal to
Temperature T4, if so, S6 is thened follow the steps, if not, thening follow the steps S4；
S6: the oil temperature heating tape power-off is controlled, the oil temperature heating tape once electrification/power-off regulation process is completed.
2. control method according to claim 1, it is characterised in that: the preset temperature T3 is greater than the preset temperature
T1, the preset temperature T4 are greater than the preset temperature T2.
3. control method according to claim 1, it is characterised in that: the outdoor environment temperature Tw outdoor coil temperature
It replaces, the indoor environment temperature Tn replaces with indoor coil pipe.
4. a kind of oil temperature heating tape control device, it is characterised in that: oil temperature heating tape control device includes:
Detection module (1), for detecting delivery temperature Tp, the outdoor environment temperature Tw, indoor environment temperature of compressor exhaust pipe
Tn；Judgment module (2), for judging the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn, the compressor
The difference of the delivery temperature Tp of exhaust pipe and the outdoor environment temperature Tw export judging result compared with preset temperature size；
Control module (3) is less than preset temperature for the difference as the outdoor environment temperature Tw and indoor environment temperature Tn
T1, and the difference of the delivery temperature Tp of the compressor exhaust pipe and the outdoor environment temperature Tw be less than preset temperature T2 when, control
The oil temperature heating tape is made to be powered；It is preset when the difference of the outdoor environment temperature Tw and the indoor environment temperature Tn are more than or equal to
When temperature T3 or the difference of the delivery temperature Tp of the compressor exhaust pipe and outdoor environment temperature Tw is more than or equal to default
When temperature T4, the oil temperature heating tape power-off is controlled.
5. a kind of oil temperature heating tape control device according to claim 4, it is characterised in that: the preset temperature T3 is greater than institute
Preset temperature T1 is stated, the preset temperature T4 is greater than the preset temperature T2.
6. a kind of oil temperature heating tape control device according to claim 4, it is characterised in that: the outdoor environment temperature Tw can
To be replaced with outdoor coil temperature, the indoor environment temperature Tn can be replaced with indoor coil pipe.
7. a kind of air conditioner, it is characterised in that: the air conditioner includes such as the described in any item oil temperature heating of claim 4-6
Band control device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710752347.5A CN109424547B (en) | 2017-08-28 | 2017-08-28 | A kind of oil temperature heating tape control method and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710752347.5A CN109424547B (en) | 2017-08-28 | 2017-08-28 | A kind of oil temperature heating tape control method and air conditioner |
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| CN109424547B true CN109424547B (en) | 2019-11-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219794A (en) * | 2019-06-28 | 2019-09-10 | 广东志高暖通设备股份有限公司 | A kind of crankcase heating tape control method of compressor |
| CN110440412B (en) * | 2019-08-14 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Control method and control system for electric heating belt of compressor and air conditioner |
| CN113531803A (en) * | 2021-06-22 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method and device for preheating heat insulation cotton of air conditioner, air conditioner and air conditioning system |
| CN114322371B (en) * | 2021-12-30 | 2024-05-14 | 苏州英维克温控技术有限公司 | Control method and system of electric heating device |
| WO2023178870A1 (en) * | 2022-03-24 | 2023-09-28 | 广东美的制冷设备有限公司 | Air conditioning system, control device and method therefor, and computer storage medium |
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| CN101749223A (en) * | 2009-10-31 | 2010-06-23 | 宁波奥克斯电气有限公司 | Method for controlling temperature of lubricating oil of compressor with low pressure chamber |
| CN202056969U (en) * | 2011-04-06 | 2011-11-30 | 广东机电职业技术学院 | Air conditioner structure capable of improving low-temperature heating performance |
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| US4066869A (en) * | 1974-12-06 | 1978-01-03 | Carrier Corporation | Compressor lubricating oil heater control |
| CN101749223A (en) * | 2009-10-31 | 2010-06-23 | 宁波奥克斯电气有限公司 | Method for controlling temperature of lubricating oil of compressor with low pressure chamber |
| CN202056969U (en) * | 2011-04-06 | 2011-11-30 | 广东机电职业技术学院 | Air conditioner structure capable of improving low-temperature heating performance |
| CN105570987A (en) * | 2015-12-31 | 2016-05-11 | 广东美的制冷设备有限公司 | Air conditioning system and oil blockage treatment method and treatment device of air conditioning system |
| CN107024046A (en) * | 2017-03-27 | 2017-08-08 | 广东美的制冷设备有限公司 | A kind of air-conditioner control method and air conditioner |
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| CN109424547A (en) | 2019-03-05 |
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