CN107883600B - One-driving-two air conditioning system - Google Patents
One-driving-two air conditioning system Download PDFInfo
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- CN107883600B CN107883600B CN201610874773.1A CN201610874773A CN107883600B CN 107883600 B CN107883600 B CN 107883600B CN 201610874773 A CN201610874773 A CN 201610874773A CN 107883600 B CN107883600 B CN 107883600B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000005057 refrigeration Methods 0.000 claims abstract description 19
- 239000003507 refrigerant Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 230000005494 condensation Effects 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type 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
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a one-to-two air conditioning system, which comprises an outdoor unit device, a first indoor unit device and a second indoor unit device; the outdoor unit device comprises a double-cylinder compressor, a first liquid reservoir, a second liquid reservoir, a first throttling mechanism, a second throttling mechanism, a water-cooling type outdoor heat exchanger and an air-cooling type outdoor heat exchanger; the first indoor unit device comprises a first indoor heat exchanger, and the second indoor unit device comprises a second indoor heat exchanger; the air conditioning system comprises a refrigeration circulation system and a full-load heating circulation system; compared with the air conditioning system in the prior art, the one-to-two air conditioning system provided by the invention has the advantages that the condenser adopts the water-cooling type outdoor heat exchanger under the refrigeration working condition, the heat on the condensation side can be recovered, the heated water can be used for domestic water, and the energy utilization rate is effectively improved.
Description
Technical Field
The invention belongs to the field of air conditioning systems, and relates to a one-to-two air conditioning system.
Background
In the existing air-cooled heat pump air conditioning system, the heat at the condenser side cannot be generally recycled, and the phenomenon of energy waste exists. In the existing one-to-two air conditioning system using the double-evaporation temperature compressor, a low GWP (Global Warming Potential ) refrigerant such as R32 or a mixture thereof is generally adopted, and the heat of the condensation side is effectively recovered by utilizing the characteristic that the exhaust temperature is higher, so that the system is used for domestic hot water, and the energy utilization rate is effectively improved.
However, in the existing one-to-two air conditioning system, when the indoor side is partially loaded in the heating condition, one indoor unit is operated, and when the other indoor unit is closed, the refrigerant firstly enters the indoor unit, so that the refrigerant or the refrigerating oil is easily accumulated in the indoor unit, the oil return of the system is poor, and meanwhile, one cylinder of the SSLC compressor is in a no-load operation state, and the long-term operation is unfavorable for the reliability of the compressor.
Disclosure of Invention
In order to solve the technical problems, the invention provides a one-to-two air conditioning system, which comprises an outdoor unit device, a first indoor unit device and a second indoor unit device; the outdoor unit device comprises a double-cylinder compressor, a first liquid reservoir, a second liquid reservoir, a first throttling mechanism, a second throttling mechanism, a water-cooling type outdoor heat exchanger and an air-cooling type outdoor heat exchanger; the first indoor unit device comprises a first indoor heat exchanger, and the second indoor unit device comprises a second indoor heat exchanger; the air conditioning system comprises a refrigeration circulation system and a full-load heating circulation system; the exhaust side of the double-cylinder compressor is provided with a first exhaust branch and a second exhaust branch, and the air inlet side is provided with a first air inlet and a second air inlet; in the refrigeration cycle system, a first exhaust branch and a second exhaust branch of the double-cylinder compressor are respectively connected with one end of the water-cooling type outdoor heat exchanger, the other end of the water-cooling type outdoor heat exchanger is sequentially connected with the first throttling mechanism, the first indoor heat exchanger and the first liquid reservoir in series to be connected with a first air inlet of the double-cylinder compressor, and the other end of the water-cooling type outdoor heat exchanger is sequentially connected with the second throttling mechanism, the second indoor heat exchanger and the second liquid reservoir in series to be connected with a second air inlet of the double-cylinder compressor; in the full-load heating circulation system, a first exhaust branch of the double-cylinder compressor is sequentially connected with the first indoor heat exchanger and a first throttling mechanism in series, is connected to the air-cooled outdoor heat exchanger, and is connected to a first air inlet of the double-cylinder compressor through the first liquid reservoir; the second exhaust branch of the double-cylinder compressor is sequentially connected in series with the second indoor heat exchanger and the second throttling mechanism to be connected to the air-cooled outdoor heat exchanger, and then is connected to the second air inlet of the double-cylinder compressor through the second liquid reservoir.
Preferably, the air conditioning system further comprises a part-load heating circulation system, wherein in the part-load heating circulation system, a first exhaust branch of the double-cylinder compressor is sequentially connected with the water-cooled outdoor heat exchanger and the first throttling mechanism in series, and then is connected to a first air inlet of the double-cylinder compressor through the first liquid reservoir; the second exhaust branch of the double-cylinder compressor is sequentially connected in series with the second indoor heat exchanger and the second throttling mechanism to be connected to the air-cooled outdoor heat exchanger, and then is connected to the second air inlet of the double-cylinder compressor through the second liquid reservoir.
Preferably, the outdoor unit apparatus further includes two four-way reversing valves, wherein a first four-way reversing valve is disposed on the first exhaust branch, and a second four-way reversing valve is disposed on the second exhaust branch; in the refrigeration cycle system, the first four-way reversing valve communicates the first exhaust branch with the water-cooled outdoor heat exchanger and communicates the first indoor heat exchanger with the first reservoir; the second four-way reversing valve is communicated with the second exhaust branch and the water-cooling type outdoor heat exchanger, and is communicated with the second indoor heat exchanger and the second liquid reservoir; in the full-load heating circulation system, the first four-way reversing valve is communicated with the first exhaust branch and the first indoor heat exchanger, and is communicated with an air-cooled outdoor heat exchanger and a first liquid reservoir; the second four-way reversing valve is communicated with the second exhaust branch and the second indoor heat exchanger, and is communicated with the air-cooled outdoor heat exchanger and the second liquid reservoir.
Preferably, the air conditioning system further comprises a heating circulation system with partial load; in the heating circulation system with partial load, a first exhaust branch of the double-cylinder compressor is sequentially connected with the water-cooling type outdoor heat exchanger and a first throttling mechanism in series, and is connected to the air-cooling type outdoor heat exchanger and then connected to a first air inlet of the double-cylinder compressor through the first liquid reservoir; the second exhaust branch of the double-cylinder compressor is sequentially connected with the second indoor heat exchanger and the second throttling mechanism in series, is connected to the air-cooled outdoor heat exchanger, and is connected to a second air inlet of the double-cylinder compressor through the second liquid reservoir; in the heating circulation system with partial load, the first four-way reversing valve is communicated with the first exhaust branch and the water-cooling type outdoor heat exchanger, and is communicated with the air-cooling type outdoor heat exchanger and a first liquid reservoir; the second four-way reversing valve is communicated with the second exhaust branch and the second indoor heat exchanger, and is communicated with the air-cooled outdoor heat exchanger and the second liquid reservoir.
Preferably, a first valve and a second valve are respectively arranged at two ends of the air-cooled outdoor heat exchanger, a third valve is arranged at one end of the water-cooled outdoor heat exchanger, which is connected with the first four-way reversing valve, two branches are arranged at the other end of the water-cooled outdoor heat exchanger, one branch is provided with a fourth valve, and the other branch is provided with a seventh valve; one end of the first indoor heat exchanger connected with the first four-way reversing valve is provided with a fifth valve, and the other end of the first indoor heat exchanger is provided with a sixth valve; in the refrigeration cycle system, the first four-way reversing valve and the second four-way reversing valve are connected to the water-cooled outdoor heat exchanger through the third valve and then to the fourth valve, and then the two valves are divided into two paths, wherein one path is connected with the first throttling mechanism, and the other path is connected with the second throttling mechanism; the first throttle mechanism is connected to the first indoor heat exchanger through the sixth valve, and the first indoor heat exchanger is connected to the first four-way reversing valve through the fifth valve; in the full-load heating cycle system, the first four-way reversing valve is connected to the first indoor heat exchanger through the fifth valve, and the first indoor heat exchanger is connected to the first throttle mechanism through a sixth valve; the first throttling mechanism and the second throttling mechanism are respectively connected to the air-cooled outdoor heat exchanger through the second valve, then to the first valve and then divided into two paths, and are respectively connected to the first four-way reversing valve and the second four-way reversing valve; in the heating circulation system with partial load, the first four-way reversing valve is connected to the water-cooled outdoor heat exchanger through the third valve and then connected to the first throttling mechanism through the seventh valve; the first throttle mechanism and the second throttle mechanism are respectively connected to the air-cooled outdoor heat exchanger through the second valve, then to the first valve, and then divided into two paths, and respectively connected to the first four-way reversing valve and the second four-way reversing valve.
Preferably, the first to seventh valves are manual valves or solenoid valves.
Preferably, the water-cooled outdoor heat exchanger is a sleeve-type or plate-type heat exchanger; the air-cooled outdoor heat exchanger is a tube-fin heat exchanger.
Preferably, the first throttling mechanism is a first electronic expansion valve or a capillary tube; the second throttling mechanism is a second electronic expansion valve or a capillary tube.
Preferably, the refrigerant is a low GWP refrigerant.
Preferably, the double-cylinder compressor has a first cylinder corresponding to the first air inlet and a second cylinder corresponding to the second air inlet, and the working volume of the first cylinder is larger than the working volume of the second cylinder.
Compared with the air conditioning system in the prior art, the one-to-two air conditioning system provided by the invention has the advantages that the condenser adopts the water-cooling type outdoor heat exchanger under the refrigeration working condition, the heat on the condensation side can be recovered, the heated water can be used for domestic water, and the energy utilization rate is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a one-to-two air conditioning system according to embodiment 1 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
Example 1
As shown in fig. 1, the one-to-two air conditioning system of the present embodiment includes an outdoor unit apparatus 1, a first indoor unit apparatus 20, and a second indoor unit apparatus 30.
The outdoor unit air conditioner 1 includes a twin-tub compressor 11, a first accumulator 12, a second accumulator 13, a first throttle mechanism 14, a second throttle mechanism 15, a water-cooled outdoor heat exchanger 16, and an air-cooled outdoor heat exchanger 17.
The first indoor unit arrangement 20 includes a first indoor heat exchanger 21; the second indoor unit 30 includes a second indoor heat exchanger 31.
The one-to-two air conditioning system of the present embodiment includes a refrigeration cycle system and a full load heating cycle system.
As shown in fig. 1, the two-cylinder compressor 11 has a first exhaust branch 11A and a second exhaust branch 11B on the exhaust side and a first intake port 11C and a second intake port 11D on the intake side. The first intake port 11C communicates with a first cylinder (not shown) and the second intake port 11D communicates with a second cylinder (not shown).
In the refrigeration cycle, a first exhaust branch 11A and a second exhaust branch 11B of the twin-tub compressor 11 are respectively connected with one end of a water-cooled outdoor heat exchanger 16, the other end of the water-cooled outdoor heat exchanger 16 is sequentially connected in series with a first throttle mechanism 14, a first indoor heat exchanger 21 and a first accumulator 12 to be connected to a first air intake 11C of the twin-tub compressor 11, and the other end of the water-cooled outdoor heat exchanger 16 is sequentially connected in series with a second throttle mechanism 15, a second indoor heat exchanger 22 and a second accumulator 13 to be connected to a second air intake 11D of the twin-tub compressor 11;
in the full-load heating circulation system, a first exhaust branch 11A of the double-cylinder compressor 11 is sequentially connected with a first indoor heat exchanger 21 and a first throttling mechanism 14 in series, is connected to an air-cooled outdoor heat exchanger 17, and is connected to a first air inlet 11C of the double-cylinder compressor 11 through a first liquid reservoir 12; the second exhaust branch 11B of the twin-tub compressor 11 is connected in series with the second indoor heat exchanger 22 and the second throttle mechanism 15 in turn to the air-cooled outdoor heat exchanger 17, and is connected to the second intake port 11D of the twin-tub compressor 11 through the second accumulator 13.
By adopting the one-to-two air conditioning system of the embodiment, the condenser adopts the water-cooling type outdoor heat exchanger 16 under the refrigeration working condition, so that the heat of the condensation side can be recovered, and the heated water can be used for domestic water, thereby effectively improving the energy utilization rate.
Preferably, the one-to-two air conditioning system of the present embodiment further includes a heating cycle system of partial load.
In the heating circulation system with partial load, a first exhaust branch 11A of the double-cylinder compressor 11 is connected with a water-cooling type outdoor heat exchanger 16 and a first throttling mechanism 14 in series in sequence, is connected with an air-cooling type outdoor heat exchanger 17, and is connected with a first air inlet 11C of the double-cylinder compressor 11 through a first liquid reservoir 12; the second exhaust branch 11B of the twin-tub compressor 11 is connected in series with the second indoor heat exchanger 22 and the second throttle mechanism 15 in turn to the air-cooled outdoor heat exchanger 17, and is connected to the second intake port 11D of the twin-tub compressor 11 through the second accumulator 13.
By adopting the one-to-two air conditioning system of the embodiment, under the heating condition of partial load, on one hand, the water-cooled outdoor heat exchanger 16 can be used as a condenser, and can still recover heat of a condensing side for supplementing domestic hot water, and on the other hand, the two indoor units are ensured to be closed for one operation, the normal operation of the two cylinders of the double-cylinder compressor 11 is realized, the oil return condition of the double-cylinder compressor is ensured, the refrigerant aggregation of the indoor units is not caused, and the reliability of the double-cylinder compressor is ensured.
As shown in fig. 1, in the present embodiment, the outdoor unit apparatus 1 further includes two four-way directional valves, wherein a first four-way directional valve 18 is disposed on the first exhaust branch 11A, and a second four-way directional valve 19 is disposed on the second exhaust branch 11B.
In the refrigeration cycle, the first four-way reversing valve 18 communicates the first exhaust branch 11A with the water-cooled outdoor heat exchanger 16, and communicates the first indoor heat exchanger 21 with the first reservoir 12; the second four-way reversing valve 19 communicates the second exhaust branch 11B with the water-cooled outdoor heat exchanger 16, and communicates the second indoor heat exchanger 22 with the second reservoir 13.
In the full-load heating cycle system, the first four-way reversing valve 18 communicates the first exhaust branch 11A with the first indoor heat exchanger 21, and communicates the air-cooled outdoor heat exchanger 16 with the first reservoir 12; the second four-way reversing valve 19 communicates the second exhaust branch 11B with the second indoor heat exchanger 22, and communicates the air-cooled outdoor heat exchanger 17 with the second reservoir 13.
In the heating cycle system of the partial load, the first four-way reversing valve 18 communicates the first exhaust branch 11A with the water-cooled outdoor heat exchanger 16, and communicates the air-cooled outdoor heat exchanger 17 with the first reservoir 12; the second four-way reversing valve 19 communicates the second exhaust branch 11B with the second indoor heat exchanger 22, and communicates the air-cooled outdoor heat exchanger 17 with the second reservoir 13.
As shown in fig. 1, in the present embodiment, both ends of the air-cooled outdoor heat exchanger 17 are provided with a first valve 41 and a second valve 42, respectively; one end of the water-cooled outdoor heat exchanger 16 connected with the first four-way reversing valve 18 is provided with a third valve 43, the other end is provided with two branches, one branch is provided with a fourth valve 44, and the other branch is provided with a seventh valve 47; the first indoor heat exchanger 21 has a fifth valve 45 at one end connected to the first four-way reversing valve 18 and a sixth valve 46 at the other end.
In the refrigeration cycle, the first, second and seventh valves 41, 42 and 47 are closed, and the third, fourth, fifth and sixth valves 43, 44, 45 and 46 are opened.
In the refrigeration cycle system, the first four-way reversing valve 18 and the second four-way reversing valve 19 are connected to the water-cooled outdoor heat exchanger 16 through the third valve 43, then to the fourth valve 44, and then divided into two paths, wherein one path is connected with the first throttling mechanism 14, and the other path is connected with the second throttling mechanism 15; the first throttle mechanism 14 is connected to the first indoor heat exchanger 21 through a sixth valve 46, and the first indoor heat exchanger 21 is connected to the first four-way reversing valve 18 through a fifth valve 45.
In the one-to-two air conditioning system of the embodiment, the circulation process of the refrigerant is as follows under the refrigeration condition: the refrigerant is discharged after being compressed in the double-cylinder compressor 11, one path of the refrigerant enters the first exhaust branch 11A and then enters the first four-way reversing valve 18, and the other path of the refrigerant enters the second exhaust branch 11B and then enters the second four-way reversing valve 19; the two paths are respectively discharged from the first four-way reversing valve 18 and the second four-way reversing valve 19, are converged, enter the water-cooled outdoor heat exchanger 16 (i.e. condenser) through the third valve 43, pass through the fourth valve 44, and are divided into two paths; one path of the air enters the first throttling mechanism 14, enters the first indoor heat exchanger 21 (namely an evaporator) through the sixth valve 46, enters the first liquid storage 12 through the fifth valve 45 and the first four-way reversing valve 18, and finally enters the first cylinder of the double-cylinder compressor 11 through the first air inlet 11C for compression; after being discharged from the fourth valve 44, the other path enters the second throttling mechanism 15, then enters the second indoor heat exchanger 22 (namely an evaporator), then enters the second liquid storage 13 through the second four-way reversing valve 19, and finally enters the second cylinder of the double-cylinder compressor 11 through the second air inlet 11D for compression.
In the full load heating cycle system, the first, second, fifth and sixth valves 41, 42, 45 and 46 are opened, and the third, fourth and seventh valves 43, 44 and 47 are closed.
In the full-load heating cycle system, the first four-way reversing valve 18 is connected to the first indoor heat exchanger 21 through the fifth valve 45, and the first indoor heat exchanger 21 is connected to the first throttle mechanism 14 through the sixth valve 46; the first throttle mechanism 14 and the second throttle mechanism 15 are each connected to the air-cooled outdoor heat exchanger 17 through a second valve 42, to a first valve 41, and then divided into two paths, which are connected to the first four-way reversing valve 18 and the second four-way reversing valve 19, respectively.
In the one-to-two air conditioning system of the present embodiment, in the full-load heating condition, the circulation process of the refrigerant is as follows: the refrigerant is discharged after being compressed in the double-cylinder compressor 11, one path of the refrigerant enters the first exhaust branch 11A, then enters the first indoor heat exchanger 21 (namely a condenser through the first four-way reversing valve 18 and the fifth valve 45, and the flow direction of the refrigerant is opposite to that of the refrigerating process), and then enters the first throttling mechanism 14 through the sixth valve 46; the other path enters a second exhaust branch 11B, then enters a second indoor heat exchanger 22 (i.e. a condenser) through a second four-way reversing valve 19, and then enters a second throttling mechanism 15; the two paths of refrigerant are discharged from the first throttle mechanism 14 and the second throttle mechanism 15, are converged, enter the air-cooled outdoor heat exchanger 17 (i.e., evaporator) through the second valve 42, pass through the first valve 41, and are split into two paths; one path enters the first liquid storage device 12 through the first four-way reversing valve 18, and finally enters the first cylinder of the double-cylinder compressor 11 through the first air inlet 11C for compression; the other path enters the second liquid storage device 13 through the second four-way reversing valve 19, and finally enters the second cylinder of the double-cylinder compressor 11 through the second air inlet 11D for compression.
In the heating cycle system of the partial load, the first, second, third and seventh valves 41, 42, 43 and 47 are opened, and the fourth, fifth and sixth valves 44, 45 and 46 are closed.
In the heating cycle system of the partial load, the first four-way switching valve 18 is connected to the water-cooled outdoor heat exchanger 16 through the third valve 43, and is further connected to the first throttle mechanism 14 through the seventh valve 47; the first throttle mechanism 14 and the second throttle mechanism 15 are each connected to the air-cooled outdoor heat exchanger 17 through a second valve 42; and after passing through the first valve 41, the valve is divided into two paths and connected to the first four-way reversing valve 18 and the second four-way reversing valve 19 respectively.
In the one-to-two air conditioning system of the present embodiment, in the heating condition of the partial load, the circulation process of the refrigerant is as follows: the refrigerant is discharged after being compressed in the double-cylinder compressor 11, one path of the refrigerant enters the first exhaust branch 11A, then enters the first four-way reversing valve 18, enters the water-cooled outdoor heat exchanger 16 (namely a condenser) through the third valve 43, and then enters the first throttling mechanism 14 through the seventh valve 47; the other path enters a second exhaust branch 11B, then enters a second indoor heat exchanger 22 (i.e. a condenser) through a second four-way reversing valve 19, and then enters a second throttling mechanism 15; the two paths of refrigerant are discharged from the first throttle mechanism 14 and the second throttle mechanism 15, are converged, enter the air-cooled outdoor heat exchanger 17 (i.e., evaporator) through the second valve 42, pass through the first valve 41, and are split into two paths; one path enters the first liquid storage device 12 through the first four-way reversing valve 18, and finally enters the first cylinder of the double-cylinder compressor 11 through the first air inlet 11C for compression; the other path enters the second liquid storage device 13 through the second four-way reversing valve 19, and finally enters the second cylinder of the double-cylinder compressor 11 through the second air inlet 11D for compression.
In a preferred embodiment of the present invention, the first to seventh valves 41 to 47 may employ a hand valve or a solenoid valve. In the present embodiment, solenoid valves are used for the first to seventh valves 41 to 47.
In a preferred embodiment of the present invention, the water-cooled outdoor heat exchanger 16 may be a double pipe or plate heat exchanger. In the present embodiment, a double pipe heat exchanger is employed. Water circulation, such as the "backwater" and "water supply" marks shown in fig. 1, may be provided on the surface of the water-cooled outdoor heat exchanger 16, and heat on the condensing side may be recovered for the replenishment of domestic hot water.
In a preferred embodiment of the present invention, the air-cooled outdoor heat exchanger 17 is a tube-fin heat exchanger. The air-cooled outdoor heat exchanger 17 is used as an evaporator, and a tube-fin heat exchanger is adopted to facilitate heat dissipation.
In this embodiment, the first throttle mechanism 14 is a first electronic expansion valve 14, and the second throttle mechanism 15 is a second electronic expansion valve 15; in other embodiments, the first throttling mechanism and the second throttling mechanism may be other devices or a combination of devices with throttling functions, such as a capillary tube.
In a preferred embodiment of the present invention, the twin-cylinder compressor 11 has a first cylinder (not shown) corresponding to the first intake port 11C and a second cylinder (not shown) corresponding to the second intake port 11D; i.e. the first cylinder communicates with the first reservoir 12 through the first air inlet 11C and the second cylinder communicates with the second reservoir 13 through the second air inlet 11D; the first cylinder and the second cylinder can be set to different working volume ratios according to the proportion of the outdoor load and the indoor load, so that the control of different evaporation temperatures of the two indoor heat exchangers is better realized.
In the present embodiment, the working volume of the first cylinder is larger than the working volume of the second cylinder, and therefore, the evaporation temperature of the first indoor heat exchanger 21 is higher than the evaporation temperature of the second indoor heat exchanger 31 under the cooling condition; that is, the first indoor heat exchanger 21 is a high-temperature evaporator, and the second indoor heat exchanger 31 is a low-temperature evaporator; specifically, the high temperature evaporator 21 is a heat exchanger with high evaporation temperature, mainly bears sensible heat load, and is also called as a sensible heat evaporator under a refrigeration condition; the low temperature evaporator 31 is a low evaporation temperature heat exchanger, and mainly bears a latent heat load, and is also called a latent heat evaporator in a cooling condition.
Of course, it is also possible to interchange. In another alternative embodiment of the invention, the working volume of the first cylinder may also be smaller than the working volume of the second cylinder; that is, the first indoor heat exchanger 21 is a low-temperature evaporator, and the second indoor heat exchanger 31 is a high-temperature evaporator.
In the present embodiment, the first throttle mechanism (first electronic expansion valve) 14 and the second throttle mechanism (second electronic expansion valve 15) can respectively regulate the flow rates of the refrigerant entering the first indoor heat exchanger 21 and the second indoor heat exchanger 31, and at the same time, the air volumes of the first indoor unit device 20 and the second indoor unit device 30 can be appropriately regulated, so that two different evaporation temperatures are realized, for example, the evaporation temperatures of the two evaporators can be set to 18 ℃ and 8 ℃ respectively, and heat exchange and air circulation are realized by respective fans.
In a preferred embodiment of the present invention, the refrigerant is a low GWP refrigerant. More preferably, a low GWP refrigerant of R32 or mixtures thereof may be employed. By utilizing the characteristic of high exhaust temperature of the low GWP refrigerant, the heat of the condensing side can be effectively recovered through the water-cooling type outdoor heat exchanger 16, so that the low GWP refrigerant is used for domestic hot water, and the energy utilization rate is effectively improved.
In summary, the invention can make hot water by utilizing the unoperated indoor machine, thereby not only avoiding the condition of oil accumulation of the indoor machine, but also ensuring that the double cylinders of the compressor are in a loaded state, thereby ensuring the reliability of the compressor.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. A one-to-two air conditioning system, characterized by: the air conditioning system comprises an outdoor unit device, a first indoor unit device and a second indoor unit device;
the outdoor unit device comprises a double-cylinder compressor, a first liquid storage device, a second liquid storage device, a first throttling mechanism, a second throttling mechanism, a water-cooling type outdoor heat exchanger, an air-cooling type outdoor heat exchanger and two four-way reversing valves;
the first indoor unit device comprises a first indoor heat exchanger, and the second indoor unit device comprises a second indoor heat exchanger;
the air conditioning system comprises a refrigeration circulation system and a full-load heating circulation system;
the exhaust side of the double-cylinder compressor is provided with a first exhaust branch and a second exhaust branch, the air inlet side of the double-cylinder compressor is provided with a first air inlet and a second air inlet, the first four-way reversing valve is arranged on the first exhaust branch, and the second four-way reversing valve is arranged on the second exhaust branch;
in the refrigeration cycle system, a first exhaust branch and a second exhaust branch of the double-cylinder compressor are respectively connected with one end of the water-cooling type outdoor heat exchanger, the other end of the water-cooling type outdoor heat exchanger is sequentially connected with the first throttling mechanism, the first indoor heat exchanger and the first liquid reservoir in series to be connected with a first air inlet of the double-cylinder compressor, and the other end of the water-cooling type outdoor heat exchanger is sequentially connected with the second throttling mechanism, the second indoor heat exchanger and the second liquid reservoir in series to be connected with a second air inlet of the double-cylinder compressor;
in the full-load heating circulation system, a first exhaust branch of the double-cylinder compressor is sequentially connected with the first indoor heat exchanger and a first throttling mechanism in series, is connected to the air-cooled outdoor heat exchanger, and is connected to a first air inlet of the double-cylinder compressor through the first liquid reservoir; the second exhaust branch of the double-cylinder compressor is sequentially connected with the second indoor heat exchanger and the second throttling mechanism in series, is connected to the air-cooled outdoor heat exchanger, and is connected to a second air inlet of the double-cylinder compressor through the second liquid reservoir;
the air conditioning system further comprises a partial load heating circulation system, wherein in the partial load heating circulation system, a first exhaust branch of the double-cylinder compressor is sequentially connected in series with the water-cooling type outdoor heat exchanger and a first throttling mechanism, and is connected to the air-cooling type outdoor heat exchanger and then connected to a first air inlet of the double-cylinder compressor through the first liquid reservoir; the second exhaust branch of the double-cylinder compressor is sequentially connected with the second indoor heat exchanger and the second throttling mechanism in series, is connected to the air-cooled outdoor heat exchanger, and is connected to a second air inlet of the double-cylinder compressor through the second liquid reservoir;
the refrigerant in the air conditioning system is R32 or a mixture thereof.
2. A one-to-two air conditioning system as defined in claim 1, wherein:
in the refrigeration cycle system, the first four-way reversing valve communicates the first exhaust branch with the water-cooled outdoor heat exchanger and communicates the first indoor heat exchanger with the first reservoir; the second four-way reversing valve is communicated with the second exhaust branch and the water-cooling type outdoor heat exchanger, and is communicated with the second indoor heat exchanger and the second liquid reservoir;
in the full-load heating circulation system, the first four-way reversing valve is communicated with the first exhaust branch and the first indoor heat exchanger, and is communicated with an air-cooled outdoor heat exchanger and a first liquid reservoir; the second four-way reversing valve is communicated with the second exhaust branch and the second indoor heat exchanger, and is communicated with the air-cooled outdoor heat exchanger and the second liquid reservoir.
3. A one-to-two air conditioning system as defined in claim 2, wherein:
in the heating circulation system with partial load, the first four-way reversing valve is communicated with the first exhaust branch and the water-cooling type outdoor heat exchanger, and is communicated with the air-cooling type outdoor heat exchanger and a first liquid reservoir; the second four-way reversing valve is communicated with the second exhaust branch and the second indoor heat exchanger, and is communicated with the air-cooled outdoor heat exchanger and the second liquid reservoir.
4. A one-to-two air conditioning system as defined in claim 3, wherein:
the two ends of the air-cooled outdoor heat exchanger are respectively provided with a first valve and a second valve,
one end of the water-cooling type outdoor heat exchanger connected with the first four-way reversing valve is provided with a third valve, the other end of the water-cooling type outdoor heat exchanger is provided with two branches, one branch is provided with a fourth valve, and the other branch is provided with a seventh valve;
one end of the first indoor heat exchanger connected with the first four-way reversing valve is provided with a fifth valve, and the other end of the first indoor heat exchanger is provided with a sixth valve;
in the refrigeration cycle system, the first four-way reversing valve and the second four-way reversing valve are connected to the water-cooled outdoor heat exchanger through the third valve and then to the fourth valve, and then the two valves are divided into two paths, wherein one path is connected with the first throttling mechanism, and the other path is connected with the second throttling mechanism; the first throttle mechanism is connected to the first indoor heat exchanger through the sixth valve, and the first indoor heat exchanger is connected to the first four-way reversing valve through the fifth valve;
in the full-load heating cycle system, the first four-way reversing valve is connected to the first indoor heat exchanger through the fifth valve, and the first indoor heat exchanger is connected to the first throttle mechanism through a sixth valve; the first throttling mechanism and the second throttling mechanism are respectively connected to the air-cooled outdoor heat exchanger through the second valve, then to the first valve and then divided into two paths, and are respectively connected to the first four-way reversing valve and the second four-way reversing valve;
in the heating circulation system with partial load, the first four-way reversing valve is connected to the water-cooled outdoor heat exchanger through the third valve and then connected to the first throttling mechanism through the seventh valve; the first throttle mechanism and the second throttle mechanism are respectively connected to the air-cooled outdoor heat exchanger through the second valve, then to the first valve, and then divided into two paths, and respectively connected to the first four-way reversing valve and the second four-way reversing valve.
5. A one-to-two air conditioning system as defined in claim 4, wherein:
the first to seventh valves are manual valves or electromagnetic valves.
6. A one-to-two air conditioning system as claimed in any one of claims 1 to 5, wherein:
the water-cooling type outdoor heat exchanger is a sleeve type or plate type heat exchanger;
the air-cooled outdoor heat exchanger is a tube-fin heat exchanger.
7. A one-to-two air conditioning system as claimed in any one of claims 1 to 5, wherein:
the first throttling mechanism is a first electronic expansion valve or a capillary tube;
the second throttling mechanism is a second electronic expansion valve or a capillary tube.
8. A one-to-two air conditioning system as claimed in any one of claims 1 to 5, wherein:
the double-cylinder compressor is provided with a first cylinder corresponding to the first air inlet and a second cylinder corresponding to the second air inlet, and the working volume of the first cylinder is larger than that of the second cylinder.
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| CN112212427A (en) * | 2019-07-12 | 2021-01-12 | 上海海立电器有限公司 | Air conditioning system integrating refrigeration, heating and water heating and control method thereof |
| CN112781128B (en) * | 2019-11-01 | 2022-07-12 | 上海海立电器有限公司 | Air conditioning system and control method thereof |
| CN111288676B (en) * | 2020-02-14 | 2021-11-02 | 特灵空调系统(中国)有限公司 | Water chilling unit |
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