CN108105919A - A kind of frequency-conversion air-conditioning system and its control method of dry cooling condition refrigeration - Google Patents
A kind of frequency-conversion air-conditioning system and its control method of dry cooling condition refrigeration Download PDFInfo
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- CN108105919A CN108105919A CN201810064377.1A CN201810064377A CN108105919A CN 108105919 A CN108105919 A CN 108105919A CN 201810064377 A CN201810064377 A CN 201810064377A CN 108105919 A CN108105919 A CN 108105919A
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- evaporating temperature
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 50
- 238000001816 cooling Methods 0.000 title claims abstract description 42
- 238000004378 air conditioning Methods 0.000 title claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims abstract description 69
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A kind of frequency-conversion air-conditioning system and its control method of dry cooling condition refrigeration,It is related to air-conditioning technical field,Its structure includes wind turbine,Compressor,Evaporator,Expansion valve,Condenser,Hot gas bypass valve,For obtaining the sensor of evaporating temperature,Air temperature sensor,Air humidity sensor,Controller,The input terminal of the output termination condenser of compressor,The input terminal of the output termination expansion valve of condenser,The input terminal of the output termination evaporator of expansion valve,The input terminal of the output termination compressor of evaporator,The controlled end of compressor,Air humidity sensor,Air temperature sensor,It is connected respectively with controller for obtaining the sensor of evaporating temperature and wind turbine,And it is controlled by it,Sensor for obtaining evaporating temperature is placed in evaporator,Hot gas bypass valve is mounted on the pipeline between compressor outlet and expansion valve outlet,Compressor is the frequency-changeable compressor for the output for being capable of step-less adjustment refrigerating capacity,Wind turbine is the adjustable speed wind turbine for being capable of stepless wind volume adjusting output,Hot gas bypass valve is electronic type regulating flow quantity valve.
Description
Technical field
The present invention relates to air-conditioning technical field, frequency-conversion air-conditioning system and its control more particularly to a kind of dry cooling condition refrigeration
Method.
Background technology
The refrigeration of air conditioner in machine room needs high sensible heat ratio design, uncontrollable yet with the evaporating temperature of air-conditioning, is difficult to realize
High sensible heat ratio, if room humidity is higher, sensible heat ratio smaller while generating condensate, also consumes unnecessary cold, passively
Dehumidifying excessively will also put into humidifier humidifies, and unnecessary humidification dehumidifying energy consumption is caused to be lost repeatedly, is behaved not energy saving.
At present, in order to improve sensible heat ratio, existing technical solution is usually using the small enthalpy difference principle of Wind Volume, increases computer room
The design air flow of air-conditioning, improves evaporating temperature as far as possible, and so as to improve sensible heat ratio, which at most can only also put forward sensible heat ratio
Height is to 0.9 or so, the energy consumption of unnecessary humidification dehumidifying for passively dehumidifying and generating can not be avoided completely, and can significantly be increased
Fan energy consumption is added, has reduced unit eer, but also unit operation noise bigger.
The content of the invention
A kind of frequency conversion sky of dry cooling condition refrigeration is provided it is an object of the invention to avoid shortcoming of the prior art
Adjusting system and its control method, the frequency-conversion air-conditioning system and its control method of dry cooling condition refrigeration can improve refrigeration system efficiency
Than effectively inhibiting noise.
The purpose of the present invention is achieved through the following technical solutions：
A kind of frequency-conversion air-conditioning system of dry cooling condition refrigeration is provided, including wind turbine, compressor, evaporator, expansion valve, condensation
Device, hot gas bypass valve, for obtaining the sensor of evaporating temperature, air temperature sensor, air humidity sensor, controller,
The input terminal of the output termination condenser of compressor, the input terminal of the output termination expansion valve of condenser, expansion valve
Output termination evaporator input terminal, the input terminal of the output termination compressor of evaporator, controlled end, the air of compressor be wet
Degree sensor, air temperature sensor are connected for obtaining the sensor of evaporating temperature and wind turbine with controller respectively, and by it
Control,
Sensor for obtaining evaporating temperature is placed in evaporator, and hot gas bypass valve is mounted on compressor outlet and expansion
On pipeline between valve outlet, compressor is variable conpacitance compressor, and wind turbine is the adjustable speed wind for being capable of stepless wind volume adjusting output
Machine, hot gas bypass valve are electronic type regulating flow quantity valve.
Wherein, for obtain the sensor of evaporating temperature be mounted on evaporator heat exchange fin surface.
Wherein, air temperature sensor and air humidity sensor are installed in the inlet side of evaporator.
Wherein, hot gas bypass valve is electronic type regulating flow quantity valve.
A kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration of the present invention, is turned by compressor frequency and wind turbine
Speed and the joint of hot gas bypass valve three, which are adjusted, realizes that dry cooling conditions of the evaporating temperature Tc higher than dew-point temperature Td is run.
Specifically, the detection air inlet dry-bulb temperature Ti of air and relative humidity Hi, and the dew point of air is calculated accordingly
Temperature Td when dew-point temperature Td is in default scope, initially enters refrigeration mode, refrigeration mode have normal refrigerating mode and
Two kinds of refrigeration mode under the too low protection of evaporating temperature.
Wherein, under normal refrigerating mode, wind turbine and compressor adjust rotating speed and frequency, hot-gas bypass all in accordance with cooling load
Valve remains turned-off；Under refrigeration mode under the too low protection of evaporating temperature, evaporator is obtained for obtaining the sensor of evaporating temperature
Evaporating temperature Tc, wind turbine, compressor, hot gas bypass valve are adjusted according to evaporating temperature Tc so that evaporating temperature Tc is not low
In dew-point temperature Td,.
When detecting evaporating temperature Tc<During the dew-point temperature Td+ lower limit temperature difference, system enters under the too low protection of evaporating temperature
Refrigeration mode；When detecting evaporating temperature Tc >=dew-point temperature Td+ upper limit temperature difference, system is exited under the too low protection of evaporating temperature
Refrigeration mode, revert to normal refrigerating mode.
Under refrigeration mode under the too low protection of evaporating temperature, system first steps up turning for wind turbine with certain speed-raising rate
Speed rises evaporating temperature Tc；Before rotation speed of fan is not up to 100% rotating speed, compressor keeps adjusting frequency according to cooling load
Rate, hot gas bypass valve remain turned-off.
Under refrigeration mode under the too low protection of evaporating temperature, if rotation speed of fan has reached 100% rotating speed, wind turbine is kept
Rotating speed 100% is constant, starts to reduce compressor frequency with certain frequency reducing rate, evaporating temperature Tc is made to increase；When compressor frequency
When rate is not up to minimum frequency, hot gas bypass valve remains turned-off,
If rotation speed of fan has reached 100% rotating speed and compressor frequency has reached minimum frequency, rotation speed of fan is kept
100% and compressor minimum frequency it is constant, open hot gas bypass valve simultaneously increases opening for hot gas bypass valve with certain valve opening rate
Degree,
If rotation speed of fan has reached 100% rotating speed, compressor frequency has reached minimum frequency and hot gas bypass valve is opened
Degree reaches 100%, then keeps rotation speed of fan 100%, compressor minimum frequency and hot-gas bypass valve opening 100% constant.
Beneficial effects of the present invention：The frequency-conversion air-conditioning system of the present invention, by compressor frequency and rotation speed of fan and
The joint of hot gas bypass valve three is adjusted, and can cause air conditioner in machine room in cooling mode, and evaporating temperature is consistently higher than return air sky
Gas dew-point temperature realizes dry cooling condition refrigerating operaton, and energy is anti-when the unnecessary humidification of passively dehumidifying generation can be avoided to dehumidify
Multiple loss, evaporating temperature is in higher level and may be such that compressor power consumption reduction, and can reduce the energy consumption of wind turbine, improves refrigeration
Systematic energy efficiency ratio effectively inhibits noise.Meanwhile evaporator dry cooling condition is run, full aluminium micro-channel heat exchanger can be used in heat exchanger,
Copper material is saved while improving heat exchange property, reduces cost.
Description of the drawings
Invention is described further using attached drawing, but the embodiment in attached drawing does not form any limitation of the invention,
For those of ordinary skill in the art, without creative efforts, can also it be obtained according to the following drawings
Its attached drawing.
Fig. 1 is a kind of frequency-conversion air-conditioning system of dry cooling condition refrigeration of the present invention and its structure diagram of control method.
Include in figure：
Wind turbine 1, compressor 2, evaporator 3, expansion valve 4, condenser 5, hot gas bypass valve 6, for obtaining evaporating temperature
Sensor 7, air temperature sensor 8, air humidity sensor 9, controller 10.
Specific embodiment
The invention will be further described with the following Examples.
The frequency-conversion air-conditioning system of a kind of dry cooling condition refrigeration of the present embodiment, as shown in Figure 1, including wind turbine 1, compressor 2, steaming
Hair device 3, expansion valve 4, condenser 5, hot gas bypass valve 6, for obtain the sensor 7 of evaporating temperature, air temperature sensor 8,
Air humidity sensor 9, controller 10,
The input terminal of the output termination condenser 5 of compressor 2, the input terminal of the output termination expansion valve 4 of condenser 5 are swollen
Swollen valve 4 output termination evaporator 3 input terminal, evaporator 3 output termination compressor 2 input terminal, compressor 2 it is controlled
End, air humidity sensor 9, air temperature sensor 8, for obtain the sensor 7 of evaporating temperature and wind turbine 1 respectively with control
Device 10 connects, and is controlled by it,
Sensor 7 for obtaining evaporating temperature is placed in evaporator 3, can be the evaporating temperature for directly obtaining temperature
Sensor or first detection pressure calculates the evaporating pressure sensor of temperature again, hot gas bypass valve 6 is mounted on compressor 2
On pipeline between outlet and the outlet of expansion valve 4, compressor 2 is variable conpacitance compressor, it is preferred that compressor 2 is can be stepless
The frequency-changeable compressor 2 of the output of refrigerating capacity is adjusted, wind turbine 1 is to be capable of the adjustable speed wind turbine 1 that stepless wind volume adjusting exports, by hot gas
Port valve 6 is electronic type regulating flow quantity valve.
It wherein, can be preferably for obtaining the heat exchange fin surface that the sensor 7 of evaporating temperature is mounted on evaporator 3
Obtain the temperature of evaporator 3.
Wherein, air temperature sensor 8 and air humidity sensor 9 are installed in the inlet side of evaporator 3, are respectively used to
Detect from closing the passage of heat or the big air-conditioning of computer room come, without conditioned air temperature, humidity.
A kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration of the present embodiment, passes through 2 frequency of compressor and wind
The joint of 6 three of 1 rotating speed of machine and hot gas bypass valve, which is adjusted, realizes that dry cooling conditions of the evaporating temperature Tc higher than dew-point temperature Td is run.
Specifically, the detection air inlet dry-bulb temperature Ti of air and relative humidity Hi, and the dew point of air is calculated accordingly
Temperature Td as dew-point temperature Td in default scope (generally 10~15 DEG C), initially enters refrigeration mode, refrigeration mode tool
There is two kinds of refrigeration mode under normal refrigerating mode and the too low protection of evaporating temperature.
Wherein, under normal refrigerating mode, wind turbine 1 and compressor 2 adjust rotating speed and frequency all in accordance with cooling load, by hot gas
Port valve 6 remains turned-off；Under refrigeration mode under the too low protection of evaporating temperature, steamed for obtaining the sensor 7 of evaporating temperature and obtaining
The evaporating temperature Tc of device 3 is sent out, wind turbine 1, compressor 2, hot gas bypass valve 6 are adjusted according to evaporating temperature Tc so that evaporation temperature
It spends Tc and is not less than dew-point temperature Td so that evaporator 3 realizes complete dry cooling condition operation.
When detecting evaporating temperature Tc<The dew-point temperature Td+ lower limits temperature difference (such as 0.5 DEG C) when, system enters evaporating temperature mistake
Refrigeration mode under low protection；When detecting the evaporating temperature Tc >=dew-point temperature Td+ upper limits temperature difference (such as 2 DEG C), system exits
Refrigeration mode under the too low protection of evaporating temperature, reverts to normal refrigerating mode.
Under refrigeration mode under the too low protection of evaporating temperature, system is first progressively carried with certain speed-raising rate (such as 1%/s)
The rotating speed of high wind turbine 1 rises evaporating temperature Tc；Before 1 rotating speed of wind turbine is not up to 100% rotating speed, compressor 2 is kept according to system
Refrigeration duty adjusts frequency, and hot gas bypass valve 6 remains turned-off.
Under refrigeration mode under the too low protection of evaporating temperature, if 1 rotating speed of wind turbine has reached 100% rotating speed, wind is kept
1 rotating speed 100% of machine is constant, starts to reduce 2 frequency of compressor with certain frequency reducing rate (such as 1Hz/s), make on evaporating temperature Tc
It rises；When 2 frequency of compressor is not up to minimum frequency, hot gas bypass valve 6 remains turned-off,
If 1 rotating speed of wind turbine has reached 100% rotating speed and 2 frequency of compressor has reached minimum frequency, wind turbine 1 is kept
Rotating speed 100% and 2 minimum frequency of compressor are constant, open hot gas bypass valve 6 and are increased with certain valve opening rate (such as 1%/s)
The aperture of hot gas bypass valve 6,
If 1 rotating speed of wind turbine has reached 100% rotating speed, 2 frequency of compressor has reached minimum frequency and hot gas bypass valve 6
Aperture reach 100%, then keep 1 rotating speed 100% of wind turbine, 2 minimum frequency of compressor and 6 aperture 100% of hot gas bypass valve not
Become.
The frequency-conversion air-conditioning system of the present embodiment, by 6 three of compressor frequency and rotation speed of fan and hot gas bypass valve
Joint adjust, can cause air conditioner in machine room in cooling mode, evaporating temperature is consistently higher than return air dew-point temperature, realize
Dry cooling condition refrigerating operaton, the loss repeatedly of energy, evaporating temperature when the unnecessary humidification of passively dehumidifying generation can be avoided to dehumidify
2 lower power consumption of compressor is may be such that in higher level, and can reduce the energy consumption of wind turbine 1, improves refrigeration system Energy Efficiency Ratio, has
Effect inhibits noise.Meanwhile 3 dry cooling condition of evaporator is run, full aluminium micro-channel heat exchanger can be used in heat exchanger, is improving heat exchange property
While save copper material, reduce cost.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of scope is protected, although being explained in detail with reference to preferred embodiment to the present invention, those of ordinary skill in the art should
Work as understanding, technical scheme can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and scope.
Claims (10)
1. a kind of frequency-conversion air-conditioning system of dry cooling condition refrigeration, it is characterised in that：Including wind turbine, compressor, evaporator, expansion valve,
Condenser, hot gas bypass valve, for obtaining the sensor of evaporating temperature, air temperature sensor, air humidity sensor, control
Device,
Compressor output termination condenser input terminal, condenser output termination expansion valve input terminal, expansion valve it is defeated
Go out to terminate the input terminal of evaporator, the input terminal of the output termination compressor of evaporator, the controlled end of compressor, air humidity pass
Sensor, air temperature sensor are connected respectively with controller for obtaining the sensor of evaporating temperature and wind turbine, and are controlled by it
System, the sensor for obtaining evaporating temperature are placed in evaporator, and hot gas bypass valve is mounted on compressor outlet and expansion valve goes out
On pipeline between mouthful, compressor is variable conpacitance compressor, and wind turbine is the adjustable speed wind turbine for being capable of stepless wind volume adjusting output.
2. a kind of frequency-conversion air-conditioning system of dry cooling condition refrigeration as described in claim 1, it is characterised in that：For obtaining evaporation temperature
The sensor of degree is mounted on the heat exchange fin surface of evaporator.
3. a kind of frequency-conversion air-conditioning system of dry cooling condition refrigeration as described in claim 1, it is characterised in that：Air temperature sensor
The inlet side of evaporator is installed in air humidity sensor.
4. a kind of frequency-conversion air-conditioning system of dry cooling condition refrigeration as described in claim 1, it is characterised in that：Hot gas bypass valve is electricity
Minor regulating flow quantity valve.
5. a kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration described in claim 1 in cooling mode, special
Sign is：It is adjusted by the joint of compressor frequency and rotation speed of fan and hot gas bypass valve three and realizes that evaporating temperature Tc is higher than
The dry cooling condition operation of dew-point temperature Td.
6. a kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration described in claim 5 in cooling mode, special
Sign is：The detection air inlet dry-bulb temperature Ti of air and relative humidity Hi, and the dew-point temperature Td of air is calculated accordingly, when
Dew-point temperature Td initially enters refrigeration mode in default scope, and refrigeration mode has normal refrigerating mode and evaporating temperature
Two kinds of refrigeration mode under too low protection.
7. a kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration described in claim 6 in cooling mode, special
Sign is：Under normal refrigerating mode, wind turbine and compressor adjust rotating speed and frequency all in accordance with cooling load, and hot gas bypass valve is kept
It closes；Under refrigeration mode under the too low protection of evaporating temperature, for obtaining the evaporation that the sensor of evaporating temperature obtains evaporator
Temperature Tc, wind turbine, compressor, hot gas bypass valve are adjusted according to evaporating temperature Tc so that evaporating temperature Tc is not less than dew point
Temperature Td.
8. a kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration described in claim 6 in cooling mode, special
Sign is：When detecting evaporating temperature Tc<During the dew-point temperature Td+ lower limit temperature difference, system enters under the too low protection of evaporating temperature
Refrigeration mode；When detecting evaporating temperature Tc >=dew-point temperature Td+ upper limit temperature difference, system is exited under the too low protection of evaporating temperature
Refrigeration mode, revert to normal refrigerating mode.
9. a kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration described in claim 6 in cooling mode, special
Sign is：Under refrigeration mode under the too low protection of evaporating temperature, system first steps up turning for wind turbine with certain speed-raising rate
Speed rises evaporating temperature Tc；Before rotation speed of fan is not up to 100% rotating speed, compressor keeps adjusting frequency according to cooling load
Rate, hot gas bypass valve remain turned-off.
10. a kind of control method of the frequency-conversion air-conditioning system of dry cooling condition refrigeration described in claim 6 in cooling mode, special
Sign is：Under refrigeration mode under the too low protection of evaporating temperature, if rotation speed of fan has reached 100% rotating speed, wind turbine is kept
Rotating speed 100% is constant, starts to reduce compressor frequency with certain frequency reducing rate, evaporating temperature Tc is made to increase；When compressor frequency
When rate is not up to minimum frequency, hot gas bypass valve remains turned-off,
If rotation speed of fan has reached 100% rotating speed and compressor frequency has reached minimum frequency, rotation speed of fan is kept
100% and compressor minimum frequency it is constant, open hot gas bypass valve simultaneously increases opening for hot gas bypass valve with certain valve opening rate
Degree,
If rotation speed of fan has reached 100% rotating speed, compressor frequency has reached minimum frequency and the aperture of hot gas bypass valve reaches
To 100%, then keep rotation speed of fan 100%, compressor minimum frequency and hot-gas bypass valve opening 100% constant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810064377.1A CN108105919B (en) | 2018-01-23 | 2018-01-23 | Variable frequency air conditioner system for dry working condition refrigeration and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064377.1A CN108105919B (en) | 2018-01-23 | 2018-01-23 | Variable frequency air conditioner system for dry working condition refrigeration and control method thereof |
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| CN108105919B CN108105919B (en) | 2024-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855255A (en) * | 2019-02-20 | 2019-06-07 | 广东英维克技术有限公司 | Control method and system of air conditioner and air conditioner |
| CN110440411A (en) * | 2019-08-08 | 2019-11-12 | 珠海格力电器股份有限公司 | Refrigerant flow direction control method and device for improving unit reliability and unit |
| CN110454944A (en) * | 2019-08-26 | 2019-11-15 | 重庆美的通用制冷设备有限公司 | Control method, device and the air conditioner of air conditioner |
| CN110836440A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Control method for inhibiting frosting of air conditioner |
| CN112775715A (en) * | 2020-12-22 | 2021-05-11 | 珠海格力智能装备有限公司 | Cooling device and cooling control method |
| CN113661943A (en) * | 2021-09-03 | 2021-11-19 | 龙川纽恩泰新能源科技发展有限公司 | Air energy incubator system and control method |
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