CN111219818B - Air conditioning system, air conditioner and control method of air conditioner - Google Patents
Air conditioning system, air conditioner and control method of air conditioner Download PDFInfo
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- CN111219818B CN111219818B CN202010050836.8A CN202010050836A CN111219818B CN 111219818 B CN111219818 B CN 111219818B CN 202010050836 A CN202010050836 A CN 202010050836A CN 111219818 B CN111219818 B CN 111219818B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 230000001276 controlling effect Effects 0.000 claims abstract description 6
- 239000003507 refrigerant Substances 0.000 abstract description 24
- 238000010257 thawing Methods 0.000 abstract description 15
- 238000005057 refrigeration Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
- 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
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioning system, an air conditioner and a control method of the air conditioner. The air conditioning system comprises a compressor, a condenser, a first current limiting device and an evaporator which are connected in sequence; the air conditioning system also comprises a second current limiting device and a pressure sensor; the second current limiting device and the first current limiting device are connected between the condenser and the evaporator in parallel; the pressure sensor is used to detect the internal pressure of the evaporator. The air conditioner comprises an air conditioning system, and the control method of the air conditioner comprises the steps of acquiring a real-time internal pressure value through a pressure sensor; and regulating and controlling the opening of the second current limiting device according to the real-time internal pressure value. When the system detects the real-time internal pressure value of the evaporator through the pressure sensor and judges that the real-time internal pressures of the evaporator within a period of time are all lower than a threshold value, the system opens the second current-limiting device to a preset opening degree, at the moment, a high-temperature and high-pressure refrigerant flows to the evaporator from the condenser, the internal pressure and the temperature of the evaporator gradually rise, defrosting is achieved, and meanwhile the air conditioning system is still in a refrigerating state when defrosting is conducted.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system, an air conditioner and a control method of the air conditioner.
Background
An existing air conditioner is provided with an air conditioning system, and the air conditioning system comprises a compressor, a condenser, an expansion valve and an evaporator which are sequentially connected. After the air conditioning system runs for a certain time, because the temperature of the evaporator is low, the heat exchange pipe of the condenser is frosted, the heat exchange capacity of the evaporator is gradually reduced, the fixed refrigerant flow cannot be completely evaporated, the heat exchange efficiency is reduced, and the air conditioning effect is reduced.
The existing air conditioning system changes the flow direction of a refrigerant by adding a four-way valve, but the air conditioning system does not have refrigeration capacity during reversing operation, so that the refrigeration effect is influenced, and the comfort of a user is reduced.
Disclosure of Invention
A first object of the present invention is to provide an air conditioning system that realizes a defrosting function while maintaining a cooling state.
A second object of the present invention is to provide an air conditioner that realizes a defrosting function by maintaining a cooling state.
A third object of the present invention is to provide a control method of an air conditioner that realizes a defrosting function while maintaining a cooling state.
The air conditioning system provided by the first object of the invention comprises a compressor, a condenser, a first current limiting device and an evaporator which are connected in sequence; the air conditioning system also comprises a second current limiting device and a pressure sensor; the second current limiting device and the first current limiting device are connected between the condenser and the evaporator in parallel; the pressure sensor is used for detecting a real-time internal pressure value of the evaporator; and the second current limiting device regulates and controls the opening according to the real-time internal pressure value.
According to the scheme, when the system detects the real-time internal pressure value of the evaporator through the pressure sensor and judges that the real-time internal pressure of the evaporator within a period of time is lower than the threshold value, the system opens the second current limiting device to the preset opening degree, at the moment, a high-temperature and high-pressure refrigerant flows to the evaporator from the condenser, the internal pressure and the temperature of the evaporator gradually rise, defrosting is achieved, and meanwhile the air conditioning system is still in a refrigerating state when defrosting is conducted.
In a further aspect, the second flow restriction device is an electronic expansion valve.
As can be seen, this arrangement ensures controllability of the air pressure and temperature of the refrigerant flowing out of the electronic expansion valve.
The air conditioning system further comprises a one-way valve, and the first flow limiting device and the one-way valve are connected between the condenser and the evaporator in series.
Therefore, the arrangement can prevent the refrigerant flowing out of the second flow limiting device from flowing back to the pipeline where the first flow limiting device is located.
In a further aspect, the first flow restriction device is a capillary tube or an electronic expansion valve.
The air conditioner provided by the second object of the invention comprises an air conditioning system, and the air conditioning system adopts the air conditioning system.
In a third aspect of the present invention, a control method for an air conditioner is provided, where the air conditioner includes: acquiring a real-time internal pressure value through a pressure sensor; and regulating and controlling the opening of the second current limiting device according to the real-time internal pressure value.
According to the scheme, when the system detects the real-time internal pressure of the evaporator through the pressure sensor and judges that the real-time internal pressure of the evaporator within a period of time is lower than the threshold value, the system opens the second current limiting device to the preset opening degree, at the moment, a high-temperature and high-pressure refrigerant flows to the evaporator from the condenser, the internal pressure and the temperature of the evaporator gradually rise, and therefore defrosting is achieved, and meanwhile the air conditioning system is still in a refrigerating state when defrosting is carried out.
The step of regulating the opening degree of the second current limiting device according to the real-time internal pressure value comprises a first judgment step of judging whether the real-time internal pressure value is lower than a first internal pressure threshold value, and if so, executing a first regulation step of regulating the opening degree of the second current limiting device from the initial opening degree to the first opening degree.
And if so, executing the second regulating step to regulate the opening degree of the second current limiting device to a second opening degree, wherein the second opening degree is smaller than the first opening degree.
And after the second regulating step, a third judging step is further included, whether the real-time internal pressure value is lower than the first internal pressure threshold value is judged, if so, the first regulating step is executed, and if not, the opening degree of the second current limiting device is regulated to the initial opening degree.
As can be seen from the above, this arrangement enables the internal pressure of the evaporator to be maintained between two preset internal pressure thresholds, i.e. the temperature of the evaporator can also be maintained within a relatively fixed range, and the evaporator is not frosted and gradually frosted in this mode; when the second current limiting device is at the second opening degree and the real-time internal pressure value of the evaporator is above the first internal pressure threshold value, the defrosting is successful, and meanwhile, the frosting is not generated any more, the second current limiting device can be regulated to the initial opening degree, so that the refrigeration mode is operated in the original set mode, and the refrigeration effect is ensured.
The step of regulating the opening degree of the second current limiting device according to the real-time internal pressure value comprises regulating the opening degree of the second current limiting device according to a plurality of real-time internal pressure values obtained within a preset time length.
Therefore, the setting can control the adjusting frequency of the opening degree of the second current limiting device according to actual requirements, the defrosting effect is guaranteed, the system operation amount is reduced, and meanwhile the second current limiting device is protected.
The method further comprises the step of judging whether the running time of the air conditioning system reaches a preset value or not before the step of acquiring the real-time internal pressure value through the pressure sensor, and if so, acquiring the real-time internal pressure value through the pressure sensor.
Therefore, in a period of time when the air conditioner starts the refrigeration mode to work, although the refrigerant in the evaporator is low-temperature and low-pressure, the frosting phenomenon does not occur, and at the moment, the defrosting function is not carried out to preferentially improve the refrigeration effect.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention.
Fig. 2 is a block diagram of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
Air conditioning system embodiment
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an air conditioning system according to the present invention. The air conditioner provided by the invention comprises an air conditioning system, wherein the air conditioning system comprises a compressor 1, a condenser 2, a first flow limiting device 31, a second flow limiting device 32, an evaporator 4, a pressure sensor 5, a one-way valve 6, an axial flow fan 71, a centrifugal fan 72, a first nozzle 81, a second nozzle 82, a high-pressure switch 83 and a low-pressure switch 84. The compressor 1 is a horizontal compressor, the first flow limiting device 31 is a capillary tube or an electronic expansion valve, and the second flow limiting device 32 is an electronic expansion valve.
The compressor 1, the first nozzle 81, the high pressure switch 83, the condenser 2, the first flow limiting device 31, the check valve 6, the evaporator 4, the low pressure switch 84, and the second nozzle 82 are sequentially turned on by a piping assembly. A first pipeline 91 and a second pipeline 92 are connected in parallel between the condenser 2 and the evaporator 4, the first flow restriction device 31 and the check valve 6 are connected in series on the first pipeline 91, and the second flow restriction device 32 is connected on the second pipeline 92. The pressure sensor 5 detects the internal pressure of the evaporator 4. The axial flow fan 71 is disposed adjacent to the condenser 2 in the air conditioning outdoor unit, and the centrifugal fan 72 is disposed adjacent to the evaporator 4 in the air conditioning indoor unit.
When the air conditioning system operates, high-temperature and high-pressure gaseous refrigerant is ejected from the high-pressure end of the compressor 1 and reaches the condenser 2, the high-temperature and high-pressure gaseous refrigerant passes through the heat exchange tube of the condenser 2 and is cooled by the axial flow fan 71 to be changed into high-temperature and high-pressure liquid refrigerant, then the refrigerant reaches the evaporator 4 through the first pipeline 91 or the second pipeline 92, the refrigerant passing through the first flow limiting device 31 is changed into low-temperature and low-pressure refrigerant, and the temperature and the air pressure of the refrigerant passing through the second flow limiting device 31 are higher than those of the refrigerant passing through the first flow limiting device 31; the refrigerant passes through the heat exchange tube of the evaporator 4, is changed from a liquid state to a gas state, and enters the low-pressure inlet of the compressor 1 in a low-pressure gas state.
Control method embodiment of air conditioner
Referring to fig. 1 and 2, fig. 2 is a block diagram of a control method of an air conditioner according to an embodiment of the present invention. The control method of the air conditioner provided by the invention is a refrigerant flow distribution method for realizing defrosting of the evaporator 4 in the refrigeration mode of the air conditioner. First, the system performs step S1, receives the command and controls the air conditioner to operate in the cooling mode S1. Subsequently, step S2 is executed to determine whether the air conditioner operation time period reaches n1 minutes. The purpose of firstly judging whether the running time reaches the preset value is that the evaporator 4 has no frosting problem until a period of time after entering the refrigeration mode, defrosting treatment is not needed, and the refrigerant in the evaporator 4 needs to be kept at low temperature and low pressure in the period of time to achieve the maximum refrigeration effect.
When the judgment result of the step S2 is yes, the system performs a step S3 to acquire real-time internal pressure values S3 of a plurality of consecutive time nodes at a fixed time frequency by the pressure sensor 5. Then the system executes a first judgment step S4 to judge whether the real-time internal pressure values within a preset time period n2 minutes are all smaller than a preset first internal pressure threshold value, if not, the system returns to the step S3, if yes, the system executes a first regulation step S5 to regulate the opening degree of the second flow limiting device 32 from the initial opening degree to the first opening degree. The first opening degree is greater than the initial opening degree, which may be 0, i.e., the second current limiting device 32 blocks. And when the second current limiting device 32 is adjusted to the first opening degree, it should satisfy
When the opening degree of the second flow restriction device 32 is controlled to the first opening degree, the high-temperature and high-pressure refrigerant flowing out of the condenser 2 flows into the second pipeline 92 to reach the second flow restriction device 32 and passes through the second flow restriction device 32, and the pressure and temperature of the refrigerant flowing out of the second flow restriction device 32 should be higher than those of the refrigerant flowing out of the first flow restriction device 31, so that the internal pressure value of the evaporator 4 is increased.
Subsequently, the system executes a second determination step S6, and determines that the plurality of real-time internal pressure values within the preset time period n3 minutes are greater than the first internal pressure threshold value and less than the second internal pressure threshold value, if not, the first regulation step S5 is continuously executed, the second flow limiting device 32 is maintained at the first opening degree, if yes, the second regulation step S7 is executed, and the opening degree of the second flow limiting device 32 is regulated from the first opening degree to the second opening degree, and the second opening degree is less than the first opening degree. At this time, the pressure and temperature of the refrigerant discharged through the second flow restriction device 32 are both decreased, and the internal pressure and temperature of the evaporator 4 are also decreased.
Then, the system continuously performs a third judgment step S8, and judges whether the real-time internal pressure values within a preset time period n2 minutes are all smaller than a preset first internal pressure threshold value, if yes, the system returns to the first regulation step S5, the opening degree of the second flow limiting device 32 is regulated from the second opening degree to the first opening degree, and if not, the system performs a step S9, the opening degree regulation of the second flow limiting device 32 is the initial opening degree, namely, the system returns to the original set operation refrigeration mode.
Under the loop of the first regulation step S5, the second determination step S6, the second regulation step S7, and the third determination step S8, the internal pressure value of the evaporator 4 may be controlled between the first internal pressure threshold and the second internal pressure threshold, thereby maintaining the cooling effect while achieving defrosting at the most suitable temperature. When the determination result of the third determination step S8 is yes, that is, it indicates that the second flow restrictor 32 is at the second opening, the internal pressure value of the evaporator 4 can also be maintained above the first internal pressure threshold, and thus, the heat exchange efficiency of the refrigerant in the heat exchange tube increases, and more heat is absorbed from the outside to raise the temperature and pressure, that is, it indicates that the evaporator 4 has been successfully defrosted, and the heat exchange efficiency of the evaporator 4 returns to the normal value and absorbs heat from the outside, and returns to a good heat exchange effect, that is, a cooling effect.
In other embodiments of the air conditioner control method, during the first, second and third determining steps, more than half of the plurality of real-time internal pressure values within a preset time period are selected to be compared with a preset internal pressure threshold, and if the first determining step is performed, more than half of the plurality of real-time internal pressure values obtained within a preset time period n2 minutes are smaller than the first internal pressure threshold, the determination result of the first determining step is yes.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.
Claims (5)
1. The control method of the air conditioner is characterized in that:
the air conditioner comprises an air conditioning system, wherein the air conditioning system comprises a compressor, a condenser, a first current limiting device and an evaporator which are sequentially connected;
the air conditioning system further comprises a second current limiting device and a pressure sensor;
the second current limiting device and the first current limiting device are connected between the condenser and the evaporator in parallel;
the pressure sensor is used for detecting a real-time internal pressure value of the evaporator;
the second current limiting device regulates and controls the opening according to the real-time internal pressure value;
the air conditioning system further comprises a one-way valve, and the first flow limiting device and the one-way valve are connected in series between the condenser and the evaporator;
the control method comprises the following steps:
acquiring a real-time internal pressure value through the pressure sensor;
regulating and controlling the opening of the second current limiting device according to the real-time internal pressure value;
the step of regulating and controlling the opening of the second current limiting device according to the real-time internal pressure value comprises the following steps:
a first judgment step of judging whether the real-time internal pressure value is lower than a first internal pressure threshold value, if so, executing a first regulation step of regulating the opening degree of the second current limiting device from an initial opening degree to a first opening degree;
after the first regulating step, a second judging step is further included, whether the real-time internal pressure value is larger than the first internal pressure threshold value and smaller than a second internal pressure threshold value is judged, if yes, the second regulating step is executed, the opening degree of the second current limiting device is regulated to a second opening degree, and the second opening degree is smaller than the first opening degree;
and after the second regulation and control step, a third judgment step is further included, whether the real-time internal pressure value is lower than the first internal pressure threshold value or not is judged, if yes, the first regulation and control step is executed, and if not, the opening degree of the second current limiting device is regulated and controlled to the initial opening degree.
2. The control method of an air conditioner according to claim 1, wherein:
the second flow limiting device is an electronic expansion valve.
3. The control method of an air conditioner according to claim 1, wherein:
the first current limiting device is a capillary tube or an electronic expansion valve.
4. The control method according to any one of claims 1 to 3, characterized in that:
the step of regulating and controlling the opening of the second current limiting device according to the real-time internal pressure value comprises the following steps:
and regulating and controlling the opening of the second current limiting device according to a plurality of real-time internal pressure values obtained within a preset time length.
5. The control method according to any one of claims 1 to 3, characterized in that:
before the step of obtaining the real-time internal pressure value through the pressure sensor, the method further comprises the following steps:
and judging whether the operation time of the air conditioning system reaches a preset value, if so, acquiring a real-time internal pressure value through the pressure sensor.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002089980A (en) * | 2000-09-20 | 2002-03-27 | Fujitsu General Ltd | Air conditioner |
| KR20060089435A (en) * | 2005-02-04 | 2006-08-09 | 엘지전자 주식회사 | Air-conditioning type air conditioner that can improve heating capacity during defrosting operation, outdoor unit and defrosting operation method used |
| KR20100110423A (en) * | 2009-04-03 | 2010-10-13 | 엘지전자 주식회사 | Air conditioner and control method thereof |
| JP5595140B2 (en) * | 2010-06-24 | 2014-09-24 | 三菱重工業株式会社 | Heat pump type hot water supply / air conditioner |
| CN205448435U (en) * | 2016-03-15 | 2016-08-10 | 广东美的制冷设备有限公司 | Can be to air conditioner of condenser defrosting |
| CN106482391A (en) * | 2016-11-02 | 2017-03-08 | 广东志高暖通设备股份有限公司 | A kind of air-conditioning equipment and its reducing pressure by regulating flow control device |
| CN206989510U (en) * | 2017-05-10 | 2018-02-09 | 青岛海尔空调器有限总公司 | A kind of air-conditioner defroster and air conditioner |
| CN207035539U (en) * | 2015-01-29 | 2018-02-23 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN108826724A (en) * | 2018-04-10 | 2018-11-16 | 珠海格力电器股份有限公司 | Refrigerating unit, refrigerating equipment and refrigerating unit control method |
| CN109323477A (en) * | 2018-09-11 | 2019-02-12 | 西安交通大学 | A transcritical CO2 heat pump system based on a precooler and a control method for a two-way valve in the water circuit |
| CN110260467A (en) * | 2019-05-28 | 2019-09-20 | 青岛海尔空调电子有限公司 | Air conditioner and its antifreeze protection control method and control device |
| CN110500714A (en) * | 2019-07-16 | 2019-11-26 | 珠海格力电器股份有限公司 | Air conditioning system and anti-freezing method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896682B (en) * | 2015-06-30 | 2017-12-08 | 广东美的暖通设备有限公司 | Warm and humid double-cotrolled type multiple on-line system and its control method |
| JP6319334B2 (en) * | 2016-01-15 | 2018-05-09 | ダイキン工業株式会社 | Refrigeration equipment |
| CN108344115B (en) * | 2018-02-07 | 2020-10-20 | 广东美的暖通设备有限公司 | Control method of air cooling unit, air cooling unit and storage medium |
-
2020
- 2020-01-17 CN CN202010050836.8A patent/CN111219818B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002089980A (en) * | 2000-09-20 | 2002-03-27 | Fujitsu General Ltd | Air conditioner |
| KR20060089435A (en) * | 2005-02-04 | 2006-08-09 | 엘지전자 주식회사 | Air-conditioning type air conditioner that can improve heating capacity during defrosting operation, outdoor unit and defrosting operation method used |
| KR20100110423A (en) * | 2009-04-03 | 2010-10-13 | 엘지전자 주식회사 | Air conditioner and control method thereof |
| JP5595140B2 (en) * | 2010-06-24 | 2014-09-24 | 三菱重工業株式会社 | Heat pump type hot water supply / air conditioner |
| CN207035539U (en) * | 2015-01-29 | 2018-02-23 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN205448435U (en) * | 2016-03-15 | 2016-08-10 | 广东美的制冷设备有限公司 | Can be to air conditioner of condenser defrosting |
| CN106482391A (en) * | 2016-11-02 | 2017-03-08 | 广东志高暖通设备股份有限公司 | A kind of air-conditioning equipment and its reducing pressure by regulating flow control device |
| CN206989510U (en) * | 2017-05-10 | 2018-02-09 | 青岛海尔空调器有限总公司 | A kind of air-conditioner defroster and air conditioner |
| CN108826724A (en) * | 2018-04-10 | 2018-11-16 | 珠海格力电器股份有限公司 | Refrigerating unit, refrigerating equipment and refrigerating unit control method |
| CN109323477A (en) * | 2018-09-11 | 2019-02-12 | 西安交通大学 | A transcritical CO2 heat pump system based on a precooler and a control method for a two-way valve in the water circuit |
| CN110260467A (en) * | 2019-05-28 | 2019-09-20 | 青岛海尔空调电子有限公司 | Air conditioner and its antifreeze protection control method and control device |
| CN110500714A (en) * | 2019-07-16 | 2019-11-26 | 珠海格力电器股份有限公司 | Air conditioning system and anti-freezing method thereof |
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