CN111811036A - Dehumidification and reheating multi-connected air conditioning system and control method thereof - Google Patents
Dehumidification and reheating multi-connected air conditioning system and control method thereof Download PDFInfo
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- CN111811036A CN111811036A CN202010707917.0A CN202010707917A CN111811036A CN 111811036 A CN111811036 A CN 111811036A CN 202010707917 A CN202010707917 A CN 202010707917A CN 111811036 A CN111811036 A CN 111811036A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
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- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a dehumidification and reheating multi-connected air conditioning system and a control method thereof, wherein the dehumidification and reheating multi-connected air conditioning system comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a refrigerant circulating system consisting of a compressor, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a gas-liquid separator, a gas pipe stop valve and a liquid pipe stop valve; the indoor unit comprises an indoor heat exchanger I and an indoor heat exchanger II; the left end of the indoor heat exchanger II is connected to the two ends of the indoor heat exchanger I through an electronic expansion valve I and an electronic expansion valve II respectively; the left end of the indoor heat exchanger I is also connected with the liquid pipe stop valve; the right end of the indoor heat exchanger II is connected with the air pipe stop valve; the indoor heat exchanger I and the indoor heat exchanger II are transversely arranged in parallel. The invention can reasonably distribute the refrigerant quantity of different heat exchangers under the environment with different requirements, so that the multi-connected air-conditioning system can be freely switched among different modes, and the controllability is improved.
Description
Technical Field
The invention relates to an air conditioning system and a control method thereof, in particular to a multi-connected air conditioning system, and specifically relates to a dehumidification and reheating multi-connected air conditioning system and a control method thereof.
Background
The traditional air conditioning system reduces the circulating air volume of the indoor unit, so that the temperature of the evaporator is reduced to quickly dehumidify, and the air outlet temperature is reduced by the reduction of the air volume while dehumidifying. When in plum rainy season, the temperature is not high but the humidity is higher, and the traditional air conditioning system is adopted for dehumidification, so that the following disadvantages are caused:
a. the air outlet temperature is low and the rib is stabbed due to cold, so that the comfort of the human body is poor;
b. the indoor environment temperature is reduced while dehumidification is carried out, and the environment comfortable state cannot be achieved.
In the existing condensation reheating temperature rising system, circulating air must be cooled and dehumidified through a dehumidifying heat exchanger, and then reheated and raised in temperature through a reheating heat exchanger. However, in a high-temperature and high-humidity environment, only temperature reduction and dehumidification are needed, and reheating and temperature rise are not needed, so that the existing condensation reheating and temperature rise system is difficult to meet the requirement.
Therefore, improvements are needed to accommodate the use requirements in different environments.
Disclosure of Invention
The invention aims to provide a dehumidification and reheating multi-connected air conditioning system and a control method thereof, which can reasonably distribute the refrigerant quantity of different heat exchangers in the environment with different requirements, so that the multi-connected air conditioning system can be freely switched among dehumidification cooling, dehumidification and reheating modes, and the controllability of the system is greatly improved.
The technical scheme of the invention is as follows:
a dehumidification reheating multi-connected air conditioning system comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a refrigerant circulating system consisting of a compressor, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a gas-liquid separator, a gas pipe stop valve and a liquid pipe stop valve; the indoor unit comprises an indoor heat exchanger I and an indoor heat exchanger II; the left end of the indoor heat exchanger II is connected to the two ends of the indoor heat exchanger I through an electronic expansion valve I and an electronic expansion valve II respectively; the left end of the indoor heat exchanger I is also connected with the liquid pipe stop valve; the right end of the indoor heat exchanger II is connected with the air pipe stop valve; the indoor heat exchanger I and the indoor heat exchanger II are transversely arranged in parallel; the indoor units are connected in parallel.
Further, a fan I is arranged in the outdoor unit; the fan I is adjacent to the outdoor heat exchanger.
Further, a fan II is arranged in the indoor unit and is close to the indoor heat exchanger II.
A control method of a dehumidification and reheating multi-connected air conditioning system comprises the following steps:
1) when dehumidification and cooling are carried out, the outdoor unit operates in a refrigeration mode, and the outdoor electronic expansion valve is completely opened without throttling; closing the electronic expansion valve I; the electronic expansion valve II plays a throttling role;
2) when the dehumidification and reheating operation is carried out, the outdoor unit operates in a refrigeration mode, and the outdoor electronic expansion valve is completely opened without throttling; the electronic expansion valve II is closed, and the electronic expansion valve I plays a throttling role;
3) when the outdoor unit operates in a heating mode during heating operation, the outdoor electronic expansion valve plays a throttling role; and closing the electronic expansion valve II, and opening the electronic expansion valve I to a proper opening degree without throttling.
The invention has the beneficial effects that:
the multi-split air conditioning system has the advantages of reasonable design, simple structure and convenient control, and can reasonably distribute the refrigerant quantity of different heat exchangers under the environment with different requirements, so that the multi-split air conditioning system can be freely switched among dehumidification cooling, dehumidification reheating and heating modes, and the controllability of the system is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention.
FIG. 2 is a schematic diagram of the system in the dehumidification cooling mode.
FIG. 3 is a schematic diagram of the system in the dehumidification and reheat mode of the present invention.
FIG. 4 is a schematic diagram of the system of the present invention in a heating mode.
Wherein: 100-an outdoor unit; 101-a compressor; 102-a four-way valve; 103-outdoor heat exchanger; 104-outdoor electronic expansion valve; 105-liquid pipe shut-off valve; 106-gas pipe stop valve; 107-gas-liquid separator; 108-a fan I; 109-an oil separator; 200-indoor unit; 201-electronic expansion valve I; 202-electronic expansion valve II; 203-indoor heat exchanger I; 204-indoor heat exchanger II; 205-fan II; 200B-a conventional indoor unit; 206-indoor electronic expansion valve; 207-indoor heat exchanger; 208-fan III. The arrows indicate the coolant flow direction.
Detailed Description
The invention is further described below with reference to the figures and examples. The descriptions of "left", "right", "inner", "outer", etc. herein are provided for convenience only and are not intended to limit the structure.
As shown in fig. 1.
A dehumidification and reheating multi-connected air conditioning system comprises an outdoor unit 100 and an indoor unit 200.
The outdoor unit comprises a refrigerant circulating system consisting of a compressor 101, an oil separator 109, a four-way valve 102, an outdoor heat exchanger 103, an outdoor electronic expansion valve 104, a gas-liquid separator 107, a gas pipe stop valve 106 and a liquid pipe stop valve 105, and specifically comprises the following components: the exhaust port of the compressor 101 is connected with the four-way valve 102 after passing through the oil separator 109; the four-way valve 102 is connected to the suction port of the compressor 101 after passing through a gas-liquid separator 107; the four-way valve 102 is also connected with an outdoor heat exchanger 103 and a gas pipe stop valve 106; the outdoor heat exchanger 103 is also connected to a liquid pipe stop valve 105 after passing through an outdoor electronic expansion valve 104. The outdoor unit 100 further includes a fan I108; the fan I108 is adjacent to the outdoor heat exchanger 103, and can promote heat exchange between the outdoor heat exchanger and air.
The indoor unit 200 comprises an indoor heat exchanger I203 and an indoor heat exchanger II 204; the left end of the indoor heat exchanger II204 is divided into two paths, one path is connected to the right end of the indoor heat exchanger I203 after passing through an electronic expansion valve I201, and the other path is connected to the left end of the indoor heat exchanger I203 after passing through an electronic expansion valve II 202. The left end of the indoor heat exchanger I203 is also connected with the liquid pipe stop valve 105; the right end of the indoor heat exchanger II204 is connected with the air pipe stop valve 106; the indoor heat exchanger I203 and the indoor heat exchanger II204 are arranged in parallel in the transverse direction, and the fan II205 is arranged on the outer side of the indoor heat exchanger II204, so that indoor air sequentially passes through the indoor heat exchanger II204 and the indoor heat exchanger I203, and the dehumidification and reheating functions are realized.
The indoor units 200 may be multiple and connected in parallel to meet the use requirements of different environments.
The present invention can also connect the conventional indoor unit 200B in parallel to the system. The conventional indoor unit 200B includes an indoor heat exchanger 207 and an indoor electronic expansion valve 206. One end of the indoor heat exchanger 207 is connected to the air pipe stop valve 106, and the other end of the indoor heat exchanger is connected to the liquid pipe stop valve 105 after passing through the indoor electronic expansion valve 206, so that the system can realize conventional refrigeration and heating functions. And a fan III208 is arranged on one side of the indoor heat exchanger 207, so that the heat exchange efficiency is improved.
The invention discloses a control method of a dehumidification and reheating multi-connected air conditioning system, which comprises the following steps:
1) during dehumidification and cooling operation, as shown in fig. 2, the outdoor unit operates in a cooling mode, and the outdoor electronic expansion valve is fully opened without throttling; closing the electronic expansion valve I; the electronic expansion valve II plays a throttling role. At the moment, high-temperature and high-pressure refrigerants discharged by the compressor are guided into the outdoor heat exchanger through the four-way valve to be condensed and radiated, the formed high-pressure and medium-temperature refrigerants enter the indoor unit, are throttled by the electronic expansion valve II and then enter the indoor heat exchanger II to be evaporated and absorbed, and indoor air is rapidly dehumidified and cooled. Then, the evaporated refrigerant flows back to the outdoor unit through the air pipe, flows into the gas-liquid separator through the four-way valve, and flows back to the compressor after gas-liquid separation, so that circulation is completed. During the period, the indoor heat exchanger I does not participate in the work.
2) During dehumidification and reheating operation, as shown in fig. 3, the outdoor unit operates in a cooling mode, and the outdoor electronic expansion valve is fully opened without throttling; and closing the electronic expansion valve II, and throttling the electronic expansion valve I. At this time, the high-temperature and high-pressure refrigerant discharged by the compressor is guided into the outdoor heat exchanger through the four-way valve to be condensed and radiated, the formed high-pressure and medium-temperature refrigerant enters the indoor unit, and is continuously condensed and radiated when passing through the indoor heat exchanger I, so that the temperature of the ambient air is increased. And then enters an indoor heat exchanger II for evaporation and heat absorption after being throttled by an electronic expansion valve I, so that the surrounding air is dehumidified and cooled. Then, the evaporated refrigerant flows through the air pipe to the outdoor unit, then flows into the gas-liquid separator through the four-way valve, and then flows back to the compressor after gas-liquid separation, so that the circulation is completed. Under the effect of fan II, the indoor air passes through indoor heat exchanger II earlier, passes through indoor heat exchanger I again, makes the air after the dehumidification cooling obtain reheating.
3) During heating operation, as shown in fig. 4, the outdoor unit operates in a heating mode, and the outdoor electronic expansion valve performs a throttling function; and closing the electronic expansion valve II, and opening the electronic expansion valve I to a proper opening degree without throttling. At this time, the high-temperature and high-pressure refrigerant discharged by the compressor is guided into the indoor unit through the four-way valve, and then sequentially passes through the indoor heat exchanger II and the indoor heat exchanger I to be condensed and radiated, so that the temperature of the ambient air is increased. Then flows back to the outdoor machine through a liquid pipe, is evaporated in an outdoor heat exchanger after being throttled by an outdoor electronic expansion valve, then enters a gas-liquid separator through a four-way valve, and flows back to a compressor after gas-liquid separation, so that the circulation is completed. The electronic expansion valve I can adjust the refrigerant quantity of different indoor units by adjusting the opening degree of the electronic expansion valve I, and the use requirements of different environments are fully met.
When a conventional indoor unit is connected to the system, as shown in fig. 2 and 4, the operation process of the conventional indoor unit is as follows:
in the cooling mode, the indoor electronic expansion valve plays a throttling role. At this time, the high-temperature and high-pressure refrigerant discharged by the compressor is guided into the outdoor heat exchanger through the four-way valve to be condensed and radiated, the formed high-pressure and medium-temperature refrigerant enters the conventional indoor unit, and is throttled by the indoor electronic expansion valve, and then is evaporated and absorbed in the indoor heat exchanger, so that the ambient air is cooled. Then, the air flows back to the outdoor unit through the air pipe, and flows back to the compressor through the four-way valve and the gas-liquid separator to complete the circulation.
In the heating mode, the indoor electronic expansion valve is fully opened, and throttling is not performed. At this time, the high-temperature and high-pressure refrigerant discharged by the compressor is guided into the conventional indoor unit through the four-way valve, and is condensed and radiated through the indoor heat exchanger, so that the temperature of the ambient air is increased. Then flows back to the outdoor machine through a liquid pipe, is evaporated in an outdoor heat exchanger after being throttled by an outdoor electronic expansion valve, then enters a gas-liquid separator through a four-way valve, and flows back to a compressor after gas-liquid separation, so that the circulation is completed.
The invention can reasonably distribute the refrigerant quantity of different heat exchangers under the environment with different requirements, so that the multi-connected air-conditioning system can be freely switched among dehumidification cooling, dehumidification reheating and heating modes, and the controllability of the system is greatly improved. And the air conditioner can be compatible with the conventional indoor unit, and fully meets the market requirements.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (4)
1. A dehumidification reheating multi-connected air conditioning system comprises an outdoor unit and an indoor unit, and is characterized in that: the outdoor unit comprises a refrigerant circulating system consisting of a compressor, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a gas-liquid separator, a gas pipe stop valve and a liquid pipe stop valve; the indoor unit comprises an indoor heat exchanger I and an indoor heat exchanger II; the left end of the indoor heat exchanger II is connected to the two ends of the indoor heat exchanger I through an electronic expansion valve I and an electronic expansion valve II respectively; the left end of the indoor heat exchanger I is also connected with the liquid pipe stop valve; the right end of the indoor heat exchanger II is connected with the air pipe stop valve; the indoor heat exchanger I and the indoor heat exchanger II are transversely arranged in parallel; the indoor units are connected in parallel.
2. The dehumidification-reheat, multi-connected air conditioning system as claimed in claim 1, wherein: a fan I is arranged in the outdoor unit; the fan I is adjacent to the outdoor heat exchanger.
3. The dehumidification-reheat, multi-connected air conditioning system as claimed in claim 1, wherein: a fan II is arranged in the indoor unit and is close to the indoor heat exchanger II.
4. A control method of a dehumidification and reheating multi-connected air conditioning system is characterized by comprising the following steps: the method comprises the following steps:
1) when dehumidification and cooling are carried out, the outdoor unit operates in a refrigeration mode, and the outdoor electronic expansion valve is opened without throttling; closing the electronic expansion valve I; the electronic expansion valve II plays a throttling role;
2) when the dehumidification and reheating operation is carried out, the outdoor unit operates in a refrigeration mode, and the outdoor electronic expansion valve is opened without throttling; the electronic expansion valve II is closed, and the electronic expansion valve I plays a throttling role;
3) when the outdoor unit operates in a heating mode during heating operation, the outdoor electronic expansion valve plays a throttling role; and closing the electronic expansion valve II, opening the electronic expansion valve I and not throttling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707917.0A CN111811036A (en) | 2020-07-22 | 2020-07-22 | Dehumidification and reheating multi-connected air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707917.0A CN111811036A (en) | 2020-07-22 | 2020-07-22 | Dehumidification and reheating multi-connected air conditioning system and control method thereof |
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| CN111811036A true CN111811036A (en) | 2020-10-23 |
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| CN202010707917.0A Pending CN111811036A (en) | 2020-07-22 | 2020-07-22 | Dehumidification and reheating multi-connected air conditioning system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361474A (en) * | 2020-11-17 | 2021-02-12 | 南京天加环境科技有限公司 | Novel dehumidification and reheating multi-connected air conditioning system and control method thereof |
| CN112555982A (en) * | 2021-01-04 | 2021-03-26 | 南京天加环境科技有限公司 | Temperature and humidity double-control air conditioning system |
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| CN202166171U (en) * | 2011-06-24 | 2012-03-14 | 大连三洋压缩机有限公司 | Composite dehumidification air-conditioning system |
| CN105352042A (en) * | 2015-11-27 | 2016-02-24 | 深圳创维空调科技有限公司 | Air conditioner indoor unit and air conditioner |
| CN106091176A (en) * | 2016-06-16 | 2016-11-09 | 珠海格力电器股份有限公司 | Dehumidifier/air-conditioning system and air conditioning control method |
| CN106556067A (en) * | 2016-11-30 | 2017-04-05 | 广东美的暖通设备有限公司 | The indoor set component of two control multi-connected machines and the two control multi-connected machines with which |
| CN110925871A (en) * | 2018-09-15 | 2020-03-27 | 陈俐 | Self-balancing constant temperature dehumidification air conditioning system |
-
2020
- 2020-07-22 CN CN202010707917.0A patent/CN111811036A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202166171U (en) * | 2011-06-24 | 2012-03-14 | 大连三洋压缩机有限公司 | Composite dehumidification air-conditioning system |
| CN105352042A (en) * | 2015-11-27 | 2016-02-24 | 深圳创维空调科技有限公司 | Air conditioner indoor unit and air conditioner |
| CN106091176A (en) * | 2016-06-16 | 2016-11-09 | 珠海格力电器股份有限公司 | Dehumidifier/air-conditioning system and air conditioning control method |
| CN106556067A (en) * | 2016-11-30 | 2017-04-05 | 广东美的暖通设备有限公司 | The indoor set component of two control multi-connected machines and the two control multi-connected machines with which |
| CN110925871A (en) * | 2018-09-15 | 2020-03-27 | 陈俐 | Self-balancing constant temperature dehumidification air conditioning system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361474A (en) * | 2020-11-17 | 2021-02-12 | 南京天加环境科技有限公司 | Novel dehumidification and reheating multi-connected air conditioning system and control method thereof |
| CN112555982A (en) * | 2021-01-04 | 2021-03-26 | 南京天加环境科技有限公司 | Temperature and humidity double-control air conditioning system |
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Application publication date: 20201023 |