CN104654691A - Air conditioner and refrigerant control system and method thereof - Google Patents
Air conditioner and refrigerant control system and method thereof Download PDFInfo
- Publication number
- CN104654691A CN104654691A CN201510096166.2A CN201510096166A CN104654691A CN 104654691 A CN104654691 A CN 104654691A CN 201510096166 A CN201510096166 A CN 201510096166A CN 104654691 A CN104654691 A CN 104654691A
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- temperature
- compressor
- delivery temperature
- superheat
- control system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a refrigerant control system and a method. The refrigerant control system comprises an acquisition device, a calculating device and an electronic expansion valve, wherein the acquisition device is used for acquiring discharge temperature, suction temperature, high-pressured pressure and low-pressured pressure; the calculating device is used for calculating discharge superheat, target suction superheat and actual suction superheat, judging whether the actual suction superheat is higher than the target suction superheat or not, and sending a judgment result to the electronic expansion valve; the electronic expansion valve is used for increasing refrigerant flux when the actual suction superheat is higher than the target suction superheat, and reducing the refrigerant flux when the actual suction superheat is lower than the target suction superheat. According to the refrigerant control system provided by the invention, the acquisition and the calculation of the temperature and the pressure are utilized, so that the refrigerant volume flowing into a compressor can be ensured to be within a controlled range, and engine oil of the compressor can be prevented from being diluted by more refrigerant, and the safe and stable operation of the system is ensured. The invention also discloses an air conditioner comprising the refrigerant control system.
Description
Technical field
The present invention relates to air-conditioning equipment application, particularly relate to a kind of refrigerant control system and method.The invention still further relates to a kind of air-conditioning comprising above-mentioned refrigerant control system.
Background technology
In air-conditioning refrigeration system, refrigerant is referred to constantly circulation and is realized the operation material of refrigeration by the state change of self, refrigerant is cold-producing medium again, cold-producing medium absorbs the heat of cooled medium (water or air etc.) and vaporizes in evaporimeter, transfers heat to surrounding air or water and condensation within the condenser.
But, existing VRF air conditioning connecting leg is more and more longer, in order to ensure cooling or heating effect, the refrigerant that extra punching note is more is needed when outdoor unit connecting leg is longer, when outdoor unit operation heating and defrosting operating mode, if can not effectively control the coolant quantity getting back to compressor, the cooled dilution agent of compressor oil is there is after outdoor unit will be caused to have removed frost, then when compressor exhaust temperature rises there is the phenomenon of violent boiling in compressor oil sump, and then cause cooled dose of the compressor oil diluted to be taken away, the lubrication that compressor shaft does not obtain machine oil there will be heavy wear, compressor damage is caused time serious.
Therefore, how effectively controlling the coolant quantity getting back to compressor, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of refrigerant control system and method, this refrigerant control system effectively can control cold medium flux, avoids too much refrigerant to flow in compressor the machine oil taken away in compressor, causes the wear-out failure of compressor.Another object of the present invention is to provide a kind of air-conditioning comprising above-mentioned refrigerant control system.
For solving the problems of the technologies described above, the invention provides following technical scheme:
A kind of refrigerant control system, for controlling the coolant quantity flowing into compressor, comprises acquisition device, calculation element and electric expansion valve;
Described acquisition device, for obtaining the delivery temperature of described compressor, suction temperature, high-pressure and low pressure;
Described calculation element, discharge superheat is calculated for the described delivery temperature that obtains according to described acquisition device and described high-pressure, target suction superheat is calculated according to described discharge superheat, actual suction superheat is calculated according to the described suction temperature obtained and described low pressure, judged result also for judging that whether actual suction superheat is higher than target suction superheat, and is sent to described electric expansion valve by described calculation element;
Described electric expansion valve, controls cold medium flux for the judged result according to described calculation element, when actual suction superheat is higher than target suction superheat, increases cold medium flux, when actual suction superheat is lower than target suction superheat, reduces cold medium flux.
Preferably, described acquisition device comprises:
For obtaining the exhaust gas temperature sensor of described delivery temperature;
For obtaining the suction temperature sensor of described suction temperature;
For obtaining the high pressure sensor of described high-pressure;
For obtaining the low pressure sensor of described low pressure.
Preferably, described exhaust gas temperature sensor comprises the first exhaust gas temperature sensor for obtaining the first delivery temperature and the second exhaust gas temperature sensor for obtaining the second delivery temperature, gets the higher value of described first delivery temperature and described second delivery temperature as delivery temperature.
Preferably, above-mentioned refrigerant control system also comprises the ball valve for preventing described refrigerant from flowing out described refrigerant control system.
Present invention also offers a kind of refrigerant control method, for controlling the coolant quantity flowing into compressor, it is characterized in that, comprise the steps:
Obtain the delivery temperature of described compressor, suction temperature, high-pressure and low pressure;
Calculate discharge superheat according to the described delivery temperature obtained and described high-pressure, and calculate target suction superheat according to described discharge superheat;
Actual suction superheat is calculated according to the described suction temperature obtained and described low pressure;
Judge that whether actual suction superheat is higher than target suction superheat, if so, then increases cold medium flux, if not, then reduces cold medium flux.
Preferably, the step calculating described discharge superheat according to described delivery temperature and described high-pressure is specially:
Calculate high pressure saturation temperature according to described high-pressure, utilize described delivery temperature to deduct described high pressure saturation temperature and calculate described discharge superheat.
Preferably, the delivery temperature obtaining described compressor comprises the first delivery temperature and the second delivery temperature that obtain described compressor, judge whether the first delivery temperature is greater than the second delivery temperature, if, then use the first delivery temperature as delivery temperature, if not, then use the second delivery temperature as delivery temperature.The present invention also provides a kind of air-conditioning, comprises the refrigerant control system described in above-mentioned any one.
A kind of air-conditioning, comprises the refrigerant control system described in above-mentioned any one.
Preferably, above-mentioned air-conditioning also comprises heat exchanger and the reversal valve that is connected with heat exchanger and the gs-oil separator be connected with described reversal valve and gas-liquid separator, described high pressure sensor is between described reversal valve and described gs-oil separator, and described low pressure sensor is between described reversal valve and described gas-liquid separator.
Preferably, described compressor comprises the first compressor in parallel and the second compressor, and described first exhaust gas temperature sensor is connected with described first compressor, and described second exhaust gas temperature sensor is connected with described second compressor.
Refrigerant control system provided by the present invention, comprises acquisition device, calculation element and electric expansion valve, and described acquisition device is for obtaining the delivery temperature of described compressor, suction temperature, high-pressure and low pressure; Calculation element is used for the described delivery temperature that obtains according to described acquisition device and described high-pressure calculates discharge superheat, target suction superheat is calculated according to described discharge superheat, actual suction superheat is calculated according to the described suction temperature obtained and described low pressure, judged result also for judging that whether actual suction superheat is higher than target suction superheat, and is sent to electric expansion valve by described calculation element; Electric expansion valve is used for controlling cold medium flux according to the judged result of described calculation element, when actual suction superheat is higher than target suction superheat, increases cold medium flux, when actual suction superheat is lower than target suction superheat, reduces cold medium flux.This refrigerant control system utilizes acquisition and the calculating of temperature and pressure, can ensure that the coolant quantity flowing into compressor is in a controlled scope, control the coolant quantity getting back to compressor, avoid compressor oil to be diluted by more refrigerant, ensure the safe and stable operation of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of detailed description of the invention of refrigerant control system provided by the present invention;
Fig. 2 is the flow chart of a kind of detailed description of the invention of refrigerant control method provided by the present invention.
Detailed description of the invention
Core of the present invention is to provide a kind of refrigerant control system and method, and this refrigerant control system effectively can control cold medium flux, avoids too much refrigerant to flow in compressor the machine oil taken away in compressor, causes the wear-out failure of compressor.Another core of the present invention is to provide a kind of air-conditioning comprising above-mentioned refrigerant control system.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of detailed description of the invention of refrigerant control system provided by the present invention.
In this embodiment, refrigerant control system comprises acquisition device, calculation element and electric expansion valve 3, and acquisition device is for obtaining the delivery temperature of compressor 1, suction temperature, high-pressure and low pressure; Calculation element be used for according to acquisition device obtain delivery temperature and high-pressure calculate discharge superheat, target suction superheat is calculated according to discharge superheat, actual suction superheat is calculated according to the suction temperature obtained and low pressure, judged result also for judging that whether actual suction superheat is higher than target suction superheat, and is sent to electric expansion valve 3 by calculation element; Electric expansion valve 3 controls cold medium flux for the judged result according to calculation element, when actual suction superheat is higher than target suction superheat, increases cold medium flux, when actual suction superheat is lower than target suction superheat, reduces cold medium flux.This refrigerant control system utilizes acquisition and the calculating of temperature and pressure, can ensure that the coolant quantity flowing into compressor 1 is in a controlled scope, control the coolant quantity getting back to compressor 1, avoid compressor 1 machine oil to be diluted by more refrigerant, ensure the safe and stable operation of system.
Further, acquisition device can comprise the exhaust gas temperature sensor 4 for obtaining delivery temperature, for obtaining the suction temperature sensor 5 of suction temperature, for obtaining the high pressure sensor 6 of high-pressure and the low pressure sensor 7 for obtaining low pressure.Four kinds of dissimilar sensors, obtain the delivery temperature of compressor 1, suction temperature, high-pressure and low pressure respectively, and send the information of acquisition to calculation element, calculation element utilizes said temperature and pressure information to calculate target suction superheat and actual suction superheat, after electric expansion valve 3 pairs of target suction superheat and actual suction superheat compare, the flow of adjustment refrigerant, improves the accuracy of the coolant quantity flowing into compressor 1.
Further, when compressor 1 comprises the first compressor and the second compressor (as frequency-changeable compressor and constant speed compressor), exhaust gas temperature sensor 4 can comprise the first exhaust gas temperature sensor of the first delivery temperature for obtaining the first compressor and the second exhaust gas temperature sensor for the second delivery temperature of obtaining the second compressor, gets the higher value of the first delivery temperature and the second delivery temperature as delivery temperature.Certainly, the number of compressor 1 can be multiple, corresponding, and the number of exhaust gas temperature sensor 4 is identical with the number of compressor 1, and gets maximum temperature that multiple exhaust gas temperature sensor 4 obtains as delivery temperature.
More specifically, in order to avoid before compressor 1 with other equipment connections, refrigerant flows out compressor 1, and this refrigerant control system can also comprise ball valve 9, and the number of ball valve 9 is generally two, lays respectively at the two ends of the connecting leg for placing refrigerant.
Except above-mentioned refrigerant control system, present invention also offers a kind of refrigerant control method, for controlling the coolant quantity flowing into compressor 1.
As shown in Figure 2, Fig. 2 is the flow chart of a kind of detailed description of the invention of refrigerant control method provided by the present invention.
The refrigerant control method provided in this embodiment comprises the steps:
Obtain the delivery temperature of compressor, suction temperature, high-pressure and low pressure;
Calculate discharge superheat according to the delivery temperature obtained and high-pressure, and calculate target suction superheat according to discharge superheat;
Actual suction superheat is calculated according to the suction temperature obtained and low pressure;
Judge that whether actual suction superheat is higher than target suction superheat, if so, then increases cold medium flux, if not, then reduces cold medium flux.
Above-mentioned refrigerant control method is by obtaining the delivery temperature of compressor, suction temperature, high-pressure and low pressure, and calculate target suction superheat and actual suction superheat by said temperature and pressure information, by judging the size of target suction superheat and actual suction superheat, carry out the control of cold medium flux.The flow of refrigerant is passed through digital translation by this refrigerant control method, make determination methods more accurate, can effectively avoid after compressor of air conditioner runs heating and defrosting operating mode, the inflow compressor that refrigerant is too much, the machine oil in compressor is caused to be diluted by refrigerant, further avoid when compressor exhaust temperature rises, there is the phenomenon of violent boiling in compressor oil sump, the compressor oil diluted is avoided to be taken away by refrigerant, ensure that compressor shaft has enough oil lubricatings, improve the service life of compressor.
Further, the step calculating discharge superheat according to delivery temperature and high-pressure is specially, and calculates high pressure saturation temperature according to high-pressure, utilizes delivery temperature to deduct high pressure saturation temperature and calculates discharge superheat.
In addition, when the number of compressor is two, the delivery temperature obtaining compressor comprises the first delivery temperature and the second delivery temperature that obtain compressor, judge whether the first delivery temperature is greater than the second delivery temperature, if, then use the first delivery temperature as delivery temperature, if not, then use the second delivery temperature as delivery temperature.
Certainly, the number of compressor can be multiple, corresponding, the parameter of the delivery temperature of the compressor of acquisition is identical with the number of compressor, and the maximum temperature got in multiple delivery temperature is as delivery temperature.
Except above-mentioned refrigerant control system and method, present invention also offers a kind of air-conditioning comprising above-mentioned refrigerant control system, above-mentioned air-conditioning also comprises heat exchanger 2 and the reversal valve 8 that is connected with heat exchanger 2 and the gs-oil separator 10 be connected with reversal valve 8 and gas-liquid separator 11, high pressure sensor 6 is between reversal valve 8 and gs-oil separator 10, and low pressure sensor 7 is between reversal valve 8 and gas-liquid separator 11.
Other Each part of air-conditioning provided by the present invention please refer to prior art, repeat no more herein.
Above refrigerant control system provided by the present invention and method are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a refrigerant control system, for controlling the coolant quantity flowing into compressor, is characterized in that, comprise acquisition device, calculation element and electric expansion valve;
Described acquisition device, for obtaining the delivery temperature of described compressor, suction temperature, high-pressure and low pressure;
Described calculation element, discharge superheat is calculated for the described delivery temperature that obtains according to described acquisition device and described high-pressure, target suction superheat is calculated according to described discharge superheat, actual suction superheat is calculated according to the described suction temperature obtained and described low pressure, judged result also for judging that whether actual suction superheat is higher than target suction superheat, and is sent to described electric expansion valve by described calculation element;
Described electric expansion valve, controls cold medium flux for the judged result according to described calculation element, when actual suction superheat is higher than target suction superheat, increases cold medium flux, when actual suction superheat is lower than target suction superheat, reduces cold medium flux.
2. refrigerant control system according to claim 1, is characterized in that, described acquisition device comprises:
For obtaining the exhaust gas temperature sensor of described delivery temperature;
For obtaining the suction temperature sensor of described suction temperature;
For obtaining the high pressure sensor of described high-pressure;
For obtaining the low pressure sensor of described low pressure.
3. refrigerant control system according to claim 2, it is characterized in that, described exhaust gas temperature sensor comprises the first exhaust gas temperature sensor for obtaining the first delivery temperature and the second exhaust gas temperature sensor for obtaining the second delivery temperature, gets the higher value of described first delivery temperature and described second delivery temperature as delivery temperature.
4. refrigerant control system according to claim 3, is characterized in that, also comprises the ball valve for preventing described refrigerant from flowing out described refrigerant control system.
5. a refrigerant control method, for controlling the coolant quantity flowing into compressor, is characterized in that, comprise the steps:
Obtain the delivery temperature of described compressor, suction temperature, high-pressure and low pressure;
Calculate discharge superheat according to the described delivery temperature obtained and described high-pressure, and calculate target suction superheat according to described discharge superheat;
Actual suction superheat is calculated according to the described suction temperature obtained and described low pressure;
Judge that whether actual suction superheat is higher than target suction superheat, if so, then increases cold medium flux, if not, then reduces cold medium flux.
6. refrigerant control method according to claim 5, is characterized in that, the step calculating described discharge superheat according to described delivery temperature and described high-pressure is specially:
Calculate high pressure saturation temperature according to described high-pressure, utilize described delivery temperature to deduct described high pressure saturation temperature and calculate described discharge superheat.
7. refrigerant control method according to claim 6, it is characterized in that, the delivery temperature obtaining described compressor comprises the first delivery temperature and the second delivery temperature that obtain described compressor, judge whether the first delivery temperature is greater than the second delivery temperature, if, then use the first delivery temperature as delivery temperature, if not, then use the second delivery temperature as delivery temperature.
8. an air-conditioning, comprises refrigerant control system, it is characterized in that, described refrigerant control system is the refrigerant control system described in Claims 1-4 any one.
9. air-conditioning according to claim 8, it is characterized in that, the reversal valve also comprising heat exchanger and be connected with heat exchanger and the gs-oil separator be connected with described reversal valve and gas-liquid separator, described high pressure sensor is between described reversal valve and described gs-oil separator, and described low pressure sensor is between described reversal valve and described gas-liquid separator.
10. air-conditioning according to claim 9, it is characterized in that, described compressor comprises the first compressor in parallel and the second compressor, and described first exhaust gas temperature sensor is connected with described first compressor, and described second exhaust gas temperature sensor is connected with described second compressor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510096166.2A CN104654691A (en) | 2015-03-04 | 2015-03-04 | Air conditioner and refrigerant control system and method thereof |
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| CN201510096166.2A CN104654691A (en) | 2015-03-04 | 2015-03-04 | Air conditioner and refrigerant control system and method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352827A (en) * | 2016-08-04 | 2017-01-25 | 珠海格力电器股份有限公司 | Detection device and method for detecting installation head and air-conditioning system control method |
| CN106482303A (en) * | 2016-11-25 | 2017-03-08 | 广州华凌制冷设备有限公司 | A kind of air-conditioner and its refrigeration control method |
| CN106766442A (en) * | 2016-11-16 | 2017-05-31 | 海信（山东）空调有限公司 | A kind of acquisition methods of the reliable degree of superheat, control method and device and air-conditioning |
| CN106871476A (en) * | 2017-02-17 | 2017-06-20 | 珠海格力电器股份有限公司 | The control method and device of a kind of net for air-source heat pump units and its electric expansion valve |
| CN109282422A (en) * | 2018-08-30 | 2019-01-29 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method and air conditioner |
| CN110513818A (en) * | 2019-08-29 | 2019-11-29 | Tcl空调器(中山)有限公司 | A kind of air conditioner refrigerating or heat-production control method, air-conditioning and storage medium |
| CN111023435A (en) * | 2019-12-30 | 2020-04-17 | Tcl空调器(中山)有限公司 | Control method and system for expansion valve of air conditioner and air conditioner |
| CN111201411A (en) * | 2017-10-12 | 2020-05-26 | 大金工业株式会社 | Refrigerating device |
| CN113339943A (en) * | 2021-05-10 | 2021-09-03 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner control device, air conditioner system and computer readable storage medium |
| CN114198827A (en) * | 2021-11-15 | 2022-03-18 | 青岛海尔空调电子有限公司 | Target exhaust superheat degree detection method and device, storage medium and air conditioner |
| CN114370717A (en) * | 2021-12-30 | 2022-04-19 | 中山长虹电器有限公司 | Heat exchange system, control method thereof and air conditioner |
| CN115451623A (en) * | 2022-08-31 | 2022-12-09 | 青岛海尔空调电子有限公司 | Pressure adjusting method and device of air conditioner and fixed-frequency air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106352827A (en) * | 2016-08-04 | 2017-01-25 | 珠海格力电器股份有限公司 | Detection device and method for detecting installation head and air-conditioning system control method |
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| CN106766442A (en) * | 2016-11-16 | 2017-05-31 | 海信（山东）空调有限公司 | A kind of acquisition methods of the reliable degree of superheat, control method and device and air-conditioning |
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| CN106482303B (en) * | 2016-11-25 | 2022-05-17 | 广州华凌制冷设备有限公司 | Air conditioner and refrigeration control method thereof |
| CN106871476A (en) * | 2017-02-17 | 2017-06-20 | 珠海格力电器股份有限公司 | The control method and device of a kind of net for air-source heat pump units and its electric expansion valve |
| CN106871476B (en) * | 2017-02-17 | 2019-08-16 | 珠海格力电器股份有限公司 | The control method and device of a kind of net for air-source heat pump units and its electric expansion valve |
| CN111201411B (en) * | 2017-10-12 | 2021-11-30 | 大金工业株式会社 | Refrigerating device |
| CN111201411A (en) * | 2017-10-12 | 2020-05-26 | 大金工业株式会社 | Refrigerating device |
| CN109282422A (en) * | 2018-08-30 | 2019-01-29 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method and air conditioner |
| CN110513818B (en) * | 2019-08-29 | 2021-08-24 | Tcl空调器(中山)有限公司 | Air conditioner refrigeration or heating control method, air conditioner and storage medium |
| CN110513818A (en) * | 2019-08-29 | 2019-11-29 | Tcl空调器(中山)有限公司 | A kind of air conditioner refrigerating or heat-production control method, air-conditioning and storage medium |
| CN111023435B (en) * | 2019-12-30 | 2021-09-28 | Tcl空调器(中山)有限公司 | Control method and system for expansion valve of air conditioner and air conditioner |
| CN111023435A (en) * | 2019-12-30 | 2020-04-17 | Tcl空调器(中山)有限公司 | Control method and system for expansion valve of air conditioner and air conditioner |
| CN113339943A (en) * | 2021-05-10 | 2021-09-03 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner control device, air conditioner system and computer readable storage medium |
| CN113339943B (en) * | 2021-05-10 | 2023-01-20 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner control device, air conditioner system and computer readable storage medium |
| CN114198827A (en) * | 2021-11-15 | 2022-03-18 | 青岛海尔空调电子有限公司 | Target exhaust superheat degree detection method and device, storage medium and air conditioner |
| CN114198827B (en) * | 2021-11-15 | 2024-02-23 | 青岛海尔空调电子有限公司 | Target exhaust superheat detection method and device, storage medium and air conditioner |
| CN114370717A (en) * | 2021-12-30 | 2022-04-19 | 中山长虹电器有限公司 | Heat exchange system, control method thereof and air conditioner |
| CN115451623A (en) * | 2022-08-31 | 2022-12-09 | 青岛海尔空调电子有限公司 | Pressure adjusting method and device of air conditioner and fixed-frequency air conditioner |
| CN115451623B (en) * | 2022-08-31 | 2024-02-20 | 青岛海尔空调电子有限公司 | Pressure regulating method and device for air conditioner and fixed-frequency air conditioner |
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Application publication date: 20150527 |