CN111811035A - Dehumidification and reheating unit type air conditioning system and control method thereof - Google Patents
Dehumidification and reheating unit type air conditioning system and control method thereof Download PDFInfo
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- CN111811035A CN111811035A CN202010707913.2A CN202010707913A CN111811035A CN 111811035 A CN111811035 A CN 111811035A CN 202010707913 A CN202010707913 A CN 202010707913A CN 111811035 A CN111811035 A CN 111811035A
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- heat exchanger
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
-
- 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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- 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 unit type air conditioning system, which comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a refrigerant circulating system consisting of a compressor, a four-way valve, an outdoor heat exchanger and a gas-liquid separator; the indoor unit comprises an indoor first heat exchanger and an indoor second heat exchanger; the first end of the indoor second heat exchanger is connected to an air pipe of the outdoor unit through an air pipe stop valve, and the second end of the indoor second heat exchanger is connected to the first end and the second end of the indoor first heat exchanger through a pipeline I and a pipeline II respectively; the pipeline I and the pipeline II are respectively provided with a first throttling part and a second throttling part; the second end of the indoor first heat exchanger is connected with a liquid pipe of the outdoor unit through a liquid pipe stop valve; the indoor first heat exchanger and the indoor second heat exchanger are transversely arranged in parallel. The invention can freely switch the unit type air conditioning system among dehumidification cooling, dehumidification reheating and heating modes, thereby greatly improving the controllability of the system.
Description
Technical Field
The invention relates to an air conditioning system and a control method thereof, in particular to a unit type air conditioning system, and specifically relates to a dehumidification and reheating unit type 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 unit type 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 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 and reheating unit type air conditioning system comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a refrigerant circulating system consisting of a compressor, a four-way valve, an outdoor heat exchanger and a gas-liquid separator; the indoor unit comprises an indoor first heat exchanger and an indoor second heat exchanger; the first end of the indoor second heat exchanger is connected to an air pipe of the outdoor unit through an air pipe stop valve, and the second end of the indoor second heat exchanger is connected to the first end and the second end of the indoor first heat exchanger through a pipeline I and a pipeline II respectively; the pipeline I and the pipeline II are respectively provided with a first throttling part and a second throttling part; the second end of the indoor first heat exchanger is connected with a liquid pipe of the outdoor unit through a liquid pipe stop valve; the indoor first heat exchanger and the indoor second heat exchanger are transversely arranged in parallel.
Further, a fan I is arranged in the outdoor unit; the fan I is adjacent to the outdoor heat exchanger.
Furthermore, a fan II is arranged in the indoor unit and is close to the indoor second heat exchanger.
Further, the first throttling component and the second throttling component are both electronic expansion valves.
A control method of a dehumidification and reheating multi-connected air conditioning system comprises the following steps:
1) when the dehumidification and cooling operation is carried out, the four-way valve is closed, so that the outdoor heat exchanger is condensed to dissipate heat; meanwhile, the first throttling part is closed, and the second throttling part is opened for throttling and depressurizing, so that the indoor heat exchanger II is evaporated and absorbs heat;
2) when the dehumidification and reheating operation is carried out, the four-way valve is closed, so that the outdoor heat exchanger is condensed to dissipate heat; meanwhile, the first throttling component is opened for throttling and depressurizing, and the second throttling component is closed, so that the refrigerant is condensed by the indoor first heat exchanger for heat dissipation and then evaporated by the indoor second heat exchanger for heat absorption;
3) when the heating operation is performed, the four-way valve is opened, so that the indoor second heat exchanger is condensed to dissipate heat; meanwhile, the first throttling part is closed, and the second throttling part is opened to throttle and reduce pressure, so that the outdoor heat exchanger is evaporated to absorb heat.
The invention has the beneficial effects that:
the invention has reasonable design, simple structure and convenient control, can reasonably distribute the refrigerant quantity of different heat exchangers under the environment with different requirements, ensures that the unit type air-conditioning system can be freely switched among dehumidification cooling, dehumidification reheating and heating modes, and greatly improves the controllability of the system.
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: 1-a compressor; 2-a four-way valve; 3-an outdoor heat exchanger; 4-indoor first heat exchanger; 5-indoor second heat exchanger; 6-a first throttling element; 7-a second throttling member; 8-a gas-liquid separator; 9-liquid pipe stop valve; 10-gas pipe stop valve; 11-a fan I; 12-blower II. The arrows indicate the coolant flow direction.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1.
A unit type air conditioning system for dehumidification and reheating comprises an outdoor unit and an indoor unit.
The outdoor unit comprises a refrigerant circulating system consisting of a compressor 1, a four-way valve 2, an outdoor heat exchanger 3 and a gas-liquid separator 8, and specifically comprises the following components: the exhaust port and the suction port of the compressor 1 are respectively connected with the four-way valve 2 and the gas-liquid separator 8; the four-way valve 2 is also simultaneously connected with an air pipe stop valve 10, an outdoor heat exchanger 3 and a gas-liquid separator 8; the outdoor heat exchanger 3 is also connected with a liquid pipe stop valve 9. Meanwhile, a fan I11 is arranged beside the outdoor heat exchanger 3 so as to improve the heat exchange efficiency.
The indoor unit comprises an indoor first heat exchanger 4 and an indoor second heat exchanger 5. A first end of the indoor second heat exchanger 5 is connected to an air pipe of the outdoor unit through an air pipe stop valve 10, and a second end of the indoor second heat exchanger is connected to a first end and a second end of the indoor first heat exchanger 4 through a pipeline I and a pipeline II, respectively. And the pipeline I and the pipeline II are respectively provided with a first throttling part 6 and a second throttling part 7. The second end of the indoor first heat exchanger 4 is connected with a liquid pipe of the outdoor unit through a liquid pipe stop valve 9; the indoor first heat exchanger 4 and the indoor second heat exchanger 5 are arranged in parallel in the transverse direction, and a fan II12 is arranged beside the indoor second heat exchanger 5, so that air can sequentially flow through the indoor second heat exchanger 5 and the indoor first heat exchanger 4, and the dehumidification and reheating functions are realized.
The first throttling component 6 and the second throttling component 7 are electronic expansion valves, and throttling or on-off functions can be achieved.
The invention discloses a control method of a dehumidification and reheating multi-connected air conditioning system, which comprises the following steps:
1) when the dehumidification cooling operation is performed, as shown in fig. 2, the four-way valve is closed; the first throttling element is closed; the second throttling component is opened to play the role of throttling and reducing pressure.
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 for condensation and heat dissipation, are throttled and depressurized through the second throttling component, and then enter the indoor second heat exchanger for evaporation and heat absorption, so that indoor air is quickly dehumidified and cooled; then, the refrigerant flows back to the outdoor unit through the air pipe, and flows back to the compressor after passing through the four-way valve and the gas-liquid separator, so that the circulation is completed. Wherein the indoor first heat exchanger does not participate in the operation.
2) When the dehumidification and reheating operation is performed, as shown in fig. 3, the four-way valve is closed; the first throttling component is opened to play a role in throttling and reducing pressure; the second throttling member is closed.
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 for condensation and heat dissipation, then further condensed and heat dissipation is carried out through the indoor first heat exchanger, and then the refrigerants enter the indoor second heat exchanger for evaporation and heat absorption after being throttled and reduced in pressure by the first throttling component, so that the indoor air is dehumidified and cooled; then, the refrigerant flows back to the outdoor unit through the air pipe, and flows back to the compressor after passing through the four-way valve and the gas-liquid separator, so that the refrigerant circulation is completed. Under fan II's effect, the room air carries out the heat transfer with indoor second heat exchanger earlier, realizes the dehumidification cooling, carries out the heat transfer with indoor first heat exchanger again, makes the temperature rise, realizes the reheat effect of dehumidification.
3) During heating operation, as shown in fig. 4, the four-way valve is opened; the first throttling element is closed; the second throttling component is opened to play the role of throttling and reducing pressure.
At the moment, high-temperature and high-pressure refrigerants discharged by the compressor are guided into the indoor second heat exchanger through the four-way valve to be condensed and radiated, and then enter the outdoor heat exchanger to be evaporated and absorb heat after being throttled and reduced in pressure by the second throttling part; then, the refrigerant flows back to the compressor after passing through the four-way valve and the gas-liquid separator, and the refrigerant circulation is completed. Meanwhile, the indoor first heat exchanger does not participate in the work. The refrigerant is condensed and dissipated in the indoor second heat exchanger to heat and raise the temperature of the indoor air, so that the heating effect is realized.
The invention can reasonably distribute the refrigerant quantity of different heat exchangers under the environment with different requirements, so that the unit type air-conditioning system can be freely switched among dehumidification cooling, dehumidification reheating and heating modes, and the controllability of the system is greatly improved.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (5)
1. A unit type air conditioning system for dehumidification and reheating 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, a four-way valve, an outdoor heat exchanger and a gas-liquid separator; the indoor unit comprises an indoor first heat exchanger and an indoor second heat exchanger; the first end of the indoor second heat exchanger is connected to an air pipe of the outdoor unit through an air pipe stop valve, and the second end of the indoor second heat exchanger is connected to the first end and the second end of the indoor first heat exchanger through a pipeline I and a pipeline II respectively; the pipeline I and the pipeline II are respectively provided with a first throttling part and a second throttling part; the second end of the indoor first heat exchanger is connected with a liquid pipe of the outdoor unit through a liquid pipe stop valve; the indoor first heat exchanger and the indoor second heat exchanger are transversely arranged in parallel.
2. The dehumidification-reheat unit 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 unit air conditioning system as claimed in claim 1, wherein: and a fan II is arranged in the indoor unit and is close to the indoor second heat exchanger.
4. The dehumidification-reheat unit air conditioning system as claimed in claim 1, wherein: the first throttling component and the second throttling component are both electronic expansion valves.
5. 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 the dehumidification and cooling operation is carried out, the four-way valve is closed, so that the outdoor heat exchanger is condensed to dissipate heat; meanwhile, the first throttling part is closed, and the second throttling part is opened for throttling and depressurizing, so that the indoor heat exchanger II is evaporated and absorbs heat;
2) when the dehumidification and reheating operation is carried out, the four-way valve is closed, so that the outdoor heat exchanger is condensed to dissipate heat; meanwhile, the first throttling component is opened for throttling and depressurizing, and the second throttling component is closed, so that the refrigerant is condensed by the indoor first heat exchanger for heat dissipation and then evaporated by the indoor second heat exchanger for heat absorption;
3) when the heating operation is performed, the four-way valve is opened, so that the indoor second heat exchanger is condensed to dissipate heat; meanwhile, the first throttling part is closed, and the second throttling part is opened to throttle and reduce pressure, so that the outdoor heat exchanger is evaporated to absorb heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707913.2A CN111811035A (en) | 2020-07-22 | 2020-07-22 | Dehumidification and reheating unit type air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707913.2A CN111811035A (en) | 2020-07-22 | 2020-07-22 | Dehumidification and reheating unit type air conditioning system and control method thereof |
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| CN111811035A true CN111811035A (en) | 2020-10-23 |
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| CN202010707913.2A Pending CN111811035A (en) | 2020-07-22 | 2020-07-22 | Dehumidification and reheating unit type air conditioning system and control method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228977A (en) * | 2020-11-18 | 2021-01-15 | 珠海格力电器股份有限公司 | Heat pump system, control method and device thereof, air conditioning equipment and storage medium |
| CN112229002A (en) * | 2020-10-26 | 2021-01-15 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN112556233A (en) * | 2020-12-22 | 2021-03-26 | 珠海格力电器股份有限公司 | Heat pump system, control method and control device thereof, air conditioning equipment and storage medium |
| CN113405178A (en) * | 2021-06-29 | 2021-09-17 | 海信（广东）空调有限公司 | Air conditioning system and control method thereof |
| CN114001414A (en) * | 2021-11-02 | 2022-02-01 | 上海亨艺环境科技有限公司 | Direct-expansion type heat pump dehumidification reheating device |
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| CN111237857A (en) * | 2020-03-05 | 2020-06-05 | 中国扬子集团滁州扬子空调器有限公司 | Air conditioner dehumidification method and system capable of keeping constant temperature |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229002A (en) * | 2020-10-26 | 2021-01-15 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN112228977A (en) * | 2020-11-18 | 2021-01-15 | 珠海格力电器股份有限公司 | Heat pump system, control method and device thereof, air conditioning equipment and storage medium |
| WO2022105605A1 (en) * | 2020-11-18 | 2022-05-27 | 珠海格力电器股份有限公司 | Heat pump system, control method therefor and apparatus thereof, and air conditioning device, and storage medium |
| CN112228977B (en) * | 2020-11-18 | 2024-04-30 | 珠海格力电器股份有限公司 | Heat pump system, control method and device thereof, air conditioning equipment and storage medium |
| CN112556233A (en) * | 2020-12-22 | 2021-03-26 | 珠海格力电器股份有限公司 | Heat pump system, control method and control device thereof, air conditioning equipment and storage medium |
| CN112556233B (en) * | 2020-12-22 | 2024-03-15 | 珠海格力电器股份有限公司 | Heat pump system, control method and control device thereof, air conditioning equipment and storage medium |
| CN113405178A (en) * | 2021-06-29 | 2021-09-17 | 海信（广东）空调有限公司 | Air conditioning system and control method thereof |
| CN113405178B (en) * | 2021-06-29 | 2022-10-14 | 海信（广东）空调有限公司 | Air conditioning system and control method thereof |
| CN114001414A (en) * | 2021-11-02 | 2022-02-01 | 上海亨艺环境科技有限公司 | Direct-expansion type heat pump dehumidification reheating device |
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Application publication date: 20201023 |