CN105004090A - Multi-split air-conditioning system and supercooling and enhanced vapor injection method thereof - Google Patents
Multi-split air-conditioning system and supercooling and enhanced vapor injection method thereof Download PDFInfo
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- CN105004090A CN105004090A CN201510406118.9A CN201510406118A CN105004090A CN 105004090 A CN105004090 A CN 105004090A CN 201510406118 A CN201510406118 A CN 201510406118A CN 105004090 A CN105004090 A CN 105004090A
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- cross valve
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
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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)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a multi-split air-conditioning system and a supercooling and enhanced vapor injection method thereof. The multi-split air-conditioning system comprises a compressor, an outdoor side heat exchanger, an indoor unit heat exchanger, a gas-liquid separator, an intermediate heat exchanger, a first four-way valve and a second four-way valve which are connected through pipelines. As the second four-way valve, a first branch circuit and the intermediate heat exchanger are arranged in the multi-split air-conditioning system, during cooling operation, the intermediate heat exchanger serves as a subcooler, a cooling medium flows in different directions through adjustment by the first branch circuit and the second four-way valve after passing through the intermediate heat exchanger, and accordingly, the cooling medium of the first branch circuit cools down a main-circuit cooling medium to achieve the supercooling purpose; and during heating operation, the intermediate heat exchanger serves as an economizer, the cooling medium passes through the first branch circuit and the second four-way valve after passing through the indoor unit heat exchanger, and then is sprayed into a medium-pressure cavity of the compressor through a jet orifice to supply a medium-pressure gaseous cooling medium for the compressor. The structure is simple and the supercooling and enhanced vapor injection purposes are better achieved.
Description
Technical field
The present invention relates to a kind of method that multi-online air-conditioning system and this system cross cold-peace air injection enthalpy-increasing, belong to steam compression type refrigeration field of air conditioning.
Background technology
Multi-online air-conditioning system has higher EER, and cold (heat) amount is directly carried by refrigerant, reduces heat exchange link, is applicable to various varying duty place.For multi-online air-conditioning system, before entering evaporimeter to prevent refrigerant, there is shwoot, usually can increase a supercooling apparatus at off-premises station, increase degree of supercooling, when making refrigerant enter indoor set throttle part, be in supercooled state.
For vapour compression refrigeration system, cross refrigerating capacity and the coefficient of performance that SAPMAC method can improve kind of refrigeration cycle, the excessively cold method of current realization has a lot, as excessively cold in condenser, subcooler is crossed cold etc., in air-conditioning refrigeration system, by the impact of coolant temperature, the mistake of condenser to refrigerant is cold limited in one's ability, and general under-cooling degree is all less.
Simultaneously in order to promote multi-online air-conditioning system heating effect at low ambient temperatures, the mode of many employings two-stage compression improves heating capacity, compressor with air injection enthalpy-increasing quite with a two-stage compression system, the effect improving heating effect can be reached equally, at present, with the multi-online air-conditioning system of air injection enthalpy-increasing, an economizer generally all to be used to obtain the gaseous coolant of intermediate pressure, for the gas jet of air injection enthalpy-increasing compressor.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that multi-online air-conditioning system and this multi-online air-conditioning system cross cold-peace air injection enthalpy-increasing, overcoming in prior art in process of refrigerastion subcooler crosses cold limited in one's ability and gaseous coolant that is that all adopt an economizer to improve intermediate pressure in heating operations realizes air injection enthalpy-increasing to refrigerant, complex structure and the higher defect of cost.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of multi-online air-conditioning system, comprise compressor, outdoor heat exchanger, the indoor set heat exchanger by pipeline communication, also comprise gas-liquid separator, Intermediate Heat Exchanger, the first cross valve and the second cross valve
Described compressor comprises refrigerant exit, jet and gas returning port; Described first cross valve comprises a1 port, b1 port, c1 port and d1 port; Described second cross valve comprises a2 port, b2 port, c2 port and d2 port; Described refrigerant exit is communicated with described a1 port by pipeline, and described jet is communicated with described a2 port by pipeline;
The top of described gas-liquid separator and described gas returning port, by pipeline communication, are communicated with described c1 port and c2 port by pipeline bottom it respectively; Described outdoor heat exchanger one side ports is communicated with described b1 port by pipeline, and the pipeline that its opposite side port is communicated with is communicated with a side ports of described indoor set heat exchanger through described Intermediate Heat Exchanger; Pipeline between described Intermediate Heat Exchanger and a side ports of described indoor set heat exchanger is connected with the first branch pipe(tube), described first branch pipe(tube) is communicated with described d2 port through described Intermediate Heat Exchanger; The opposite side port of described indoor set heat exchanger is communicated with described d1 port by pipeline; Described b2 port is by the second branch pipe(tube) and the pipeline communication between described refrigerant exit and described a1 port.
When above-mentioned described first cross valve powers on, a1 port and the conducting of b2 port, c1 port and the conducting of d1 port; During described first cross valve power down, a1 port and the conducting of d1 port, b1 port and the conducting of c1 port; When described second cross valve powers on, a2 port and the conducting of d2 port, b2 port and the conducting of c2 port; During described second cross valve power down, a2 port and the conducting of b2 port, c2 port and the conducting of d2 port.
The invention has the beneficial effects as follows: owing to being provided with the second cross valve and the first branch road, Intermediate Heat Exchanger in multi-online air-conditioning system, when refrigerating operaton, Intermediate Heat Exchanger serves as the effect of subcooler, refrigerant after Intermediate Heat Exchanger by the first branch road and the second cross valve regulate the various flows of refrigerant to, the refrigerant of the first branch road is cooled main road refrigerant by Intermediate Heat Exchanger, realized cold object; When heating operation, Intermediate Heat Exchanger serves as economizer, refrigerant is by passing through the first branch road and the second cross valve after indoor set heat exchanger, being sprayed in compressor by jet presses in chamber again, for compressor provides the gaseous coolant of intermediate pressure, this system architecture is simple and can realize the object that cold-peace increases enthalpy preferably.
On the basis of technique scheme, the present invention can also do following improvement.
The present invention's a kind of multi-online air-conditioning system described above, further, the pipeline between described outdoor heat exchanger opposite side port and described Intermediate Heat Exchanger is provided with the first electronic throttle parts; Pipeline before described first branch pipe(tube) penetrates Intermediate Heat Exchanger is provided with the second electronic throttle parts.
The present invention's a kind of multi-online air-conditioning system described above, further, the pipeline between described first branch pipe(tube) and a side ports of described indoor set heat exchanger is provided with off-premises station liquid side stop valve; Off-premises station gas side stop valve is provided with between the opposite side port of described indoor set heat exchanger and described d1 port; Described second branch pipe(tube) is provided with the check valve only flowing to compressor direction; Described compressor is the compressor with air injection enthalpy-increasing.
The present invention also provides a kind of described multi-online air-conditioning system to cross the method for cold-peace air injection enthalpy-increasing, during described multi-online air-conditioning system refrigerating operaton, first cross valve powers on, second cross valve power down, after refrigerant compresses in compressor, through first cross valve be communicated with a1 port and b2 port successively by outdoor heat exchanger and Intermediate Heat Exchanger after be divided into two-way, wherein, indoor set heat exchanger is passed through successively in one tunnel, the d1 port that first cross valve is communicated with and c1 port enter gas-liquid separator, gas returning port is entered through gas-liquid separator, another road is successively by entering gas-liquid separator through the first branch pipe(tube) of Intermediate Heat Exchanger and the d2 port of the second cross valve and c2 port, gas returning port is entered through gas-liquid separator, complete a kind of refrigeration cycle,
During described multi-online air-conditioning system heating operation, first cross valve power down, second cross valve powers on, after refrigerant compresses in compressor, through first cross valve be communicated with a1 port and d1 port by indoor set heat exchanger after be divided into two-way, wherein Intermediate Heat Exchanger is passed through successively in a road, the b1 port that outdoor heat exchanger and the first cross valve are communicated with and c1 port enter gas-liquid separator, gas returning port is entered through gas-liquid separator, chamber is pressed by being sprayed in compressor by described jet through the first branch pipe(tube) of Intermediate Heat Exchanger and the d2 port of the second cross valve and a2 port successively in another road.
The present invention, owing to being provided with the second cross valve and the first branch pipe(tube) can improve specific refrigerating effect and coefficient of refrigerating performance, improves degree of supercooling.The compressor of band air injection enthalpy-increasing of the present invention is equivalent to a two-stage compression system, the effect improving heating effect can be reached equally, in above-mentioned heating operations, the flow direction that second cross valve and the first branch pipe(tube) change refrigerant can provide the gaseous coolant of intermediate pressure, for the gas jet of compressor for compressor.
Accompanying drawing explanation
Fig. 1 is a kind of multi-online air-conditioning system principle schematic of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1, compressor, 2, off-premises station gas side stop valve, the 3, first cross valve, 4, outdoor heat exchanger, the 5, first electronic throttle parts, the 6, second cross valve, 7, gas-liquid separator, 8, check valve, the 9, second electronic throttle parts, 10, Intermediate Heat Exchanger, 11, off-premises station liquid side stop valve, 12, indoor set heat exchanger, the 13, first bye-pass, the 14, second branch pipe(tube).
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of multi-online air-conditioning system, comprise compressor 1, outdoor heat exchanger 4, the indoor set heat exchanger 12 by pipeline communication, also comprise gas-liquid separator 7, Intermediate Heat Exchanger 10, first cross valve 3 and the second cross valve 6, particularly, described compressor is the compressor with air injection enthalpy-increasing.
Described compressor 1 comprises refrigerant exit 101, jet 102 and gas returning port 103; Described first cross valve 3 comprises a1 port, b1 port, c1 port and d1 port; Described second cross valve 6 comprises a2 port, b2 port, c2 port and d2 port; Described refrigerant exit 11 is communicated with described a1 port by pipeline, and described jet 102 is communicated with described a2 port by pipeline;
The top of described gas-liquid separator 7 and described gas returning port 103, by pipeline communication, are communicated with described c1 port and c2 port by pipeline bottom it respectively; Described outdoor heat exchanger 4 one side ports is communicated with described b1 port by pipeline, and the pipeline that its opposite side port is communicated with is communicated with a side ports of described indoor set heat exchanger 12 through described Intermediate Heat Exchanger 10; Pipeline between described Intermediate Heat Exchanger 10 and a side ports of described indoor set heat exchanger 12 is connected with the first branch pipe(tube) 13, described first branch pipe(tube) 13 is communicated with described d2 port through described Intermediate Heat Exchanger 10; The opposite side port of described indoor set heat exchanger 12 is communicated with described d1 port by pipeline; Described b2 port is by the second branch pipe(tube) 14 and the pipeline communication between described refrigerant exit 11 and described a1 port.
When above-mentioned described first cross valve 3 powers on, a1 port and the conducting of b2 port, c1 port and the conducting of d1 port; During described first cross valve 3 power down, a1 port and the conducting of d1 port, b1 port and the conducting of c1 port; When described second cross valve 6 powers on, a2 port and the conducting of d2 port, b2 port and the conducting of c2 port; During described second cross valve 6 power down, a2 port and the conducting of b2 port, c2 port and the conducting of d2 port.
A kind of multi-online air-conditioning system of the present invention, in certain embodiments, the pipeline between outdoor heat exchanger 4 opposite side port and Intermediate Heat Exchanger 10 is provided with the first electronic throttle parts 5; Pipeline before first branch pipe(tube) 13 penetrates Intermediate Heat Exchanger 10 is provided with the second electronic throttle parts 9.
A kind of multi-online air-conditioning system of the present invention, in other specific embodiments, the pipeline between described first branch pipe(tube) 13 and a side ports of described indoor set heat exchanger 12 is provided with off-premises station liquid side stop valve 11; Off-premises station gas side stop valve 2 is provided with between the opposite side port of described indoor set heat exchanger 12 and described d1 port; Described second branch pipe(tube) 14 is provided with the check valve 8 only flowing to compressor direction.
Particularly, during above-mentioned multi-online air-conditioning system refrigerating operaton, first cross valve 3 powers on, second cross valve 6 power down, after refrigerant compresses in compressor, the a1 port be communicated with through the first cross valve 3 and b2 port are successively by outdoor heat exchanger 4, two-way is divided into after first electronic throttle parts 5 and Intermediate Heat Exchanger 10, wherein, one tunnel is successively by off-premises station liquid side stop valve 11, indoor set heat exchanger 12, off-premises station gas side stop valve 2, the d1 port that first cross valve is communicated with and c1 port enter gas-liquid separator 7, gas returning port 103 is entered through gas-liquid separator 6, another road enters gas-liquid separator 7 by the second electronic throttle parts 9 and through the first branch pipe(tube) 13 of Intermediate Heat Exchanger 10 and the d2 port of the second cross valve and c2 port successively, gas returning port 103 is entered through gas-liquid separator 7, complete a kind of refrigeration cycle.
Multi-online air-conditioning system refrigerating operaton process, above-mentioned Intermediate Heat Exchanger 10 serves as subcooler, cools main line refrigerant, realizes cold object.
During described multi-online air-conditioning system heating operation, first cross valve power down, second cross valve powers on, after refrigerant compresses in compressor, successively by a1 port and the d1 port of the first cross valve 3 connection, off-premises station gas side stop valve 2, two-way is divided into after indoor set heat exchanger 12 and off-premises station liquid side stop valve 11, wherein a road is successively by Intermediate Heat Exchanger 10, first electronic throttle parts 5, the b1 port that outdoor heat exchanger 4 and the first cross valve are communicated with and c1 port enter gas-liquid separator 7, gas returning port 103 is entered through gas-liquid separator 7, another road is successively by the second electronic throttle parts 9, to be sprayed in compressor by described jet 102 through the first branch pipe(tube) 13 of Intermediate Heat Exchanger 10 and the d2 port of the second cross valve and a2 port and press chamber, complete and once heat circulation.
Multi-online air-conditioning system heating process, above-mentioned Intermediate Heat Exchanger 10 serves as economizer, for compressor air injection enthalpy-increasing provides the gaseous coolant of intermediate pressure.
In describing the invention, it is to be appreciated that unless otherwise clearly defined and limited, the term such as term " installation ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, can be removably connect, or integral; Can be mechanical connection, can be directly be connected; " connection " can be rotate to be communicated with, and also can be direct connection, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a multi-online air-conditioning system, comprise compressor (1), outdoor heat exchanger (4), the indoor set heat exchanger (12) by pipeline communication, it is characterized in that, also comprise gas-liquid separator (7), Intermediate Heat Exchanger (10), the first cross valve (3) and the second cross valve (6)
Described compressor (1) comprises refrigerant exit (101), jet (102) and gas returning port (103); Described first cross valve (3) comprises a1 port, b1 port, c1 port and d1 port; Described second cross valve (6) comprises a2 port, b2 port, c2 port and d2 port; Described refrigerant exit (101) is communicated with described a1 port by pipeline, and described jet (102) is communicated with described a2 port by pipeline;
The top of described gas-liquid separator (7) and described gas returning port (103), by pipeline communication, are communicated with described c1 port and c2 port by pipeline bottom it respectively; Described outdoor heat exchanger (4) side ports is communicated with described b1 port by pipeline, and the pipeline that its opposite side port is communicated with is communicated with a side ports of described indoor set heat exchanger (12) through described Intermediate Heat Exchanger (10); Pipeline between one side ports of described Intermediate Heat Exchanger (10) and described indoor set heat exchanger (12) is connected with the first branch pipe(tube) (13), described first branch pipe(tube) (13) is communicated with described d2 port through described Intermediate Heat Exchanger (10); The opposite side port of described indoor set heat exchanger (12) is communicated with described d1 port by pipeline; Described b2 port is by the second branch pipe(tube) (14) and the pipeline communication between described refrigerant exit (102) and described a1 port.
2. a kind of multi-online air-conditioning system according to claim 1, it is characterized in that, the pipeline between described outdoor heat exchanger (4) opposite side port and described Intermediate Heat Exchanger (10) is provided with the first electronic throttle parts (5).
3. a kind of multi-online air-conditioning system according to claim 2, it is characterized in that, described first branch pipe(tube) (13) penetrates the front pipeline of Intermediate Heat Exchanger (10) and is provided with the second electronic throttle parts (9).
4. a kind of multi-online air-conditioning system according to any one of claims 1 to 3, it is characterized in that, the pipeline between a side ports of described first branch pipe(tube) (13) and described indoor set heat exchanger (12) is provided with off-premises station liquid side stop valve (11).
5. a kind of multi-online air-conditioning system according to any one of claim 5, is characterized in that, is provided with off-premises station gas side stop valve (2) between the opposite side port of described indoor set heat exchanger (13) and described d1 port.
6. a kind of multi-online air-conditioning system according to claim 6, it is characterized in that, described second branch pipe(tube) (14) is provided with the check valve (8) only flowing to compressor direction.
7. a kind of multi-online air-conditioning system according to any one of claims 1 to 3, is characterized in that, when described first cross valve (3) powers on, and a1 port and the conducting of b2 port, c1 port and the conducting of d1 port; During described first cross valve (3) power down, a1 port and the conducting of d1 port, b1 port and the conducting of c1 port; When described second cross valve (6) powers on, a2 port and the conducting of d2 port, b2 port and the conducting of c2 port; During described second cross valve (6) power down, a2 port and the conducting of b2 port, c2 port and the conducting of d2 port.
8. a kind of multi-online air-conditioning system according to any one of claims 1 to 3, is characterized in that, described compressor (1) is for having the compressor of air injection enthalpy-increasing.
9. the multi-online air-conditioning system described in any one of claim 1 to 8 crosses a method for cold-peace air injection enthalpy-increasing, it is characterized in that,
During described multi-online air-conditioning system refrigerating operaton, first cross valve (3) powers on, second cross valve (4) power down, after refrigerant compresses in compressor, the a1 port be communicated with through the first cross valve (3) and b2 port successively by outdoor heat exchanger (4) and Intermediate Heat Exchanger (10) after be divided into two-way, wherein a road is successively by indoor set heat exchanger (12), d1 port and the c1 port of the first cross valve connection (3) enter gas-liquid separator (7), described gas returning port (103) is entered through gas-liquid separator (7), another road is successively by entering gas-liquid separator (7) through first branch pipe(tube) (13) of Intermediate Heat Exchanger (10) and the d2 port of the second cross valve (6) and c2 port, described gas returning port (103) is entered through gas-liquid separator (7), complete a kind of refrigeration cycle,
During described multi-online air-conditioning system heating operation, first cross valve (3) power down, second cross valve (6) powers on, after refrigerant compresses in compressor, the a1 port be communicated with through the first cross valve (3) and d1 port by indoor set heat exchanger (12) after be divided into two-way, wherein a road is successively by Intermediate Heat Exchanger (10), the b1 port that outdoor heat exchanger (4) and the first cross valve (3) are communicated with and c1 port enter gas-liquid separator (7), described gas returning port (103) is entered through gas-liquid separator (7), another road is successively by spraying into the middle pressure chamber of compressor (1) through first branch pipe(tube) (13) of Intermediate Heat Exchanger (10) and the d2 port of the second cross valve (6) and a2 port by described jet (102).
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| CN105716311A (en) * | 2016-02-29 | 2016-06-29 | 珠海格力电器股份有限公司 | Multi-split air conditioning device and system, method for refrigerating and heating and control method for system |
| CN106196721A (en) * | 2016-07-04 | 2016-12-07 | 珠海格力电器股份有限公司 | A kind of spray enthalpy compressor air-conditioning system and control method thereof |
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| CN109099610A (en) * | 2018-09-07 | 2018-12-28 | 青岛海信日立空调***有限公司 | Refrigeration system, air conditioner and the air-conditioner control method of Gas-supplying enthalpy-increasing |
| CN109386909A (en) * | 2018-10-22 | 2019-02-26 | 广东美的暖通设备有限公司 | Outdoor unit, method for controlling oil return and air conditioner |
| CN109682105A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN109945544A (en) * | 2019-03-12 | 2019-06-28 | 天津大学 | A kind of air injection enthalpy-increasing CO2Three backheat chiller-heat pumps/refrigeration system |
| CN112443899A (en) * | 2019-09-04 | 2021-03-05 | 广东美的制冷设备有限公司 | Air conditioning system and control method thereof |
| WO2021082331A1 (en) * | 2019-10-28 | 2021-05-06 | 广东美的制冷设备有限公司 | Air conditioner |
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