CN220541410U - Single-stage subcritical carbon dioxide multi-split air conditioning system - Google Patents
Single-stage subcritical carbon dioxide multi-split air conditioning system Download PDFInfo
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- CN220541410U CN220541410U CN202322042597.3U CN202322042597U CN220541410U CN 220541410 U CN220541410 U CN 220541410U CN 202322042597 U CN202322042597 U CN 202322042597U CN 220541410 U CN220541410 U CN 220541410U
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 48
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 48
- 238000004378 air conditioning Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000001704 evaporation Methods 0.000 claims abstract description 32
- 230000008020 evaporation Effects 0.000 claims abstract description 32
- 239000003507 refrigerant Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 230000002457 bidirectional effect Effects 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000005057 refrigeration Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000005338 heat storage Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 23
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009182 swimming Effects 0.000 description 15
- 238000005265 energy consumption Methods 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a single-stage subcritical carbon dioxide multi-split air-conditioning cooling and heating system which comprises a compressor, a two-way evaporation heat exchanger, a liquid storage device, a four-way reversing valve, a liquid flow pipe and a gas flow pipe, wherein four interfaces of the four-way reversing valve are respectively connected with an air suction end of the compressor, an air discharge end of the compressor, the two-way evaporation heat exchanger and the gas flow pipe, the two-way evaporation heat exchanger is connected with the liquid storage device, the liquid storage device is connected with the liquid flow pipe, and a tail end component is respectively connected with the liquid flow pipe and the gas flow pipe. The beneficial effects are as follows: the multi-split cooling and heating system can realize multiple working modes of cooling and heating switching, partial tail end cooling and partial tail end heating in one set of system, improves the diversity of the overall operation condition of the multi-split cooling and heating system under the condition of not adding a complex refrigerant switching pipeline, and solves various cooling and heating requirements of one building complex through one set of system. Further improves the efficiency of the system, greatly reduces the power consumption, and really realizes energy conservation and environmental protection.
Description
Technical Field
The utility model relates to the field of air conditioners, in particular to a single-stage subcritical carbon dioxide multi-split air cooling and heating system.
Background
The climate change is dealt with, the carbon emission is reduced, and the building industry is becoming a dominant force. Statistics show that the building energy consumption accounts for about 1/3 of the energy consumption of the whole society, the reduction of the energy consumption of the part can obviously improve the whole energy consumption condition of the society, and meanwhile, the energy saving and emission reduction effects and the environmental protection are very obvious. The energy consumption of air conditioners is a considerable proportion of the energy consumption of buildings. The traditional multi-split central air conditioner is overlapped with a freon refrigerating system and a water circulating system, and the temperature is regulated by using water circulation, so that people are working on a method and a technology for solving the problem of freon pollution due to the defects of large freon density, large viscosity and small pressure difference, and approaches for solving the problem of environmental pollution mainly comprise limiting and disabling, substitute development and harmless treatment of freon. Along with the continuous enhancement of the attention of the international society to the aspects of energy conservation, emission reduction and environmental protection, the elimination step of the Freon refrigerant is also accelerated, and carbon dioxide is used as a safe and environment-friendly refrigerant, so that the refrigerant has wide application prospect and considerable economic value. However, the carbon dioxide refrigerant has the inherent characteristic of high critical pressure, so that the popularization and application of the carbon dioxide refrigeration system are limited.
In conclusion, the utility model provides a single-stage subcritical carbon dioxide multi-on-line cooling and heating system which takes carbon dioxide as a circulating working medium, is energy-saving and environment-friendly and has high efficiency, and is an innovative and research machine.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a single-stage subcritical carbon dioxide multi-split air-conditioning system which takes carbon dioxide as a circulating working medium, is energy-saving and environment-friendly and has high efficiency.
The utility model provides a single-stage subcritical carbon dioxide multi-split air conditioning system, which has the technical scheme that:
the single-stage subcritical carbon dioxide multi-split air-conditioning system comprises a compressor, a bidirectional evaporation heat exchanger, a liquid reservoir, a four-way reversing valve, a liquid flow pipe and a gas flow pipe, wherein four interfaces of the four-way reversing valve are respectively connected with an air suction end of the compressor, an air discharge end of the compressor, the bidirectional evaporation heat exchanger and the gas flow pipe, the bidirectional evaporation heat exchanger is connected with the liquid reservoir, the liquid reservoir is connected with the liquid flow pipe, and a tail end component is respectively connected with the liquid flow pipe and the gas flow pipe; in a refrigeration mode, the four-way reversing valve conducts the exhaust end of the compressor with the bidirectional evaporation heat exchanger, and conducts the suction end of the carbon dioxide compressor with the gas flow pipe; in the heating mode, the four-way reversing valve conducts the exhaust end of the compressor with the gas flow pipe, and conducts the air suction end of the carbon dioxide compressor with the bidirectional evaporation heat exchanger.
Further, the compressor, the bidirectional evaporation heat exchanger, the liquid storage device and the tail end of the cold and hot system form a carbon dioxide single-stage circulation system, and the carbon dioxide single-stage circulation system runs below the critical point of the condensation temperature.
Further, a regulating valve is arranged on a pipeline between the bidirectional evaporation heat exchanger and the liquid storage device.
Further, a life hot water tank is arranged on a pipeline between the compressor and the four-way reversing valve, regulating valves are arranged at the inlet end and the outlet end of the life hot water tank, and a thermometer is arranged at the outlet end.
Further, the bidirectional evaporation heat exchanger comprises a closed shell, a centrifugal fan, a heat exchange tube group and an atomization spray head, wherein the centrifugal fan is arranged on one side of the closed shell, the atomization spray head and the heat exchange tube group are arranged in the closed shell, the centrifugal fan is used for sucking water vapor or air in the closed shell, the water vapor or air in the closed shell exchanges heat with a refrigerant flowing in the heat exchange tube group, an electric roller shutter is arranged on one side of the closed shell, and the opening or closing of the electric roller shutter is used for switching a heating state or a refrigerating state of the heat exchanger.
Further, the atomizing nozzle is connected with a high-pressure water pipe; the centrifugal fan is a backward inclined centrifugal fan; one side of the rolling curtain is provided with a grid plate.
Further, the tail end assembly comprises a fan coil, the inlet and outlet ends of the fan coil are respectively connected with the liquid flow pipe and the gas flow pipe, thermometers are arranged on inlet and outlet pipelines of the fan coil, and a regulating valve is arranged on one pipeline.
Further, the tail end assembly comprises a floor heater, an inlet end and an outlet end of the floor heater are respectively connected with the liquid flow pipe and the gas flow pipe, regulating valves are arranged on inlet and outlet pipelines of the floor heater, and a one-way valve and a thermometer are arranged at an outlet end of the floor heater.
Further, the floor heating is a parallel multi-row pipeline arranged in a plurality of rooms, the floor heating pipe comprises an air supply pipe, a liquid return pipe and a plurality of branch pipes, the branch pipes are outwards bent for a plurality of circles continuously and are coiled in the floor, the floor comprises a concrete slab, a reflecting layer, a steel wire mesh sheet, a heat storage layer and a floor brick layer which are paved in sequence, and the branch pipes are fixed on the steel wire mesh sheet through clamping rings and are abutted with the coil pipe layer.
Further, the tail end assembly comprises a cold accumulation heat accumulator, the inlet and outlet ends of the cold accumulation heat accumulator are respectively connected with the liquid runner pipe and the gas runner pipe, and the inlet and outlet pipelines of the cold accumulation heat accumulator are respectively provided with a thermometer and a regulating valve.
The implementation of the utility model comprises the following technical effects:
according to the single-stage subcritical carbon dioxide multi-split cooling and heating system, through arranging the liquid flow pipe, the gas flow pipe and the four-way reversing valve and improving the connection modes of the bidirectional evaporation heat exchanger, the compressor, the liquid flow pipe, the gas flow pipe and the four-way reversing valve, the tail end heating component or the tail end refrigerating component is connected with the liquid flow pipe and the gas flow pipe, multiple working modes of refrigerating and heating switching, partial tail end refrigerating and partial tail end heating in one set of system can be realized, the diversity of the overall operation condition of the multi-split cooling and heating system is improved under the condition that a complex refrigerant switching pipeline is not added, different requirements of different people on comfort of body feeling are met, and the cooling and heating requirements of different tail ends are met, namely, various cooling and heating requirements of one building complex are met through one set of system. Further improves the efficiency of the system, greatly reduces the power consumption, and really realizes energy conservation and environmental protection. Furthermore, components such as a cold and heat accumulator (such as a cold and heat accumulation swimming pool) and the like can be arranged to ensure the high-efficiency and safe operation of the system.
Drawings
Fig. 1 is a schematic diagram of a refrigeration state of a single-stage subcritical carbon dioxide multi-split cooling and heating system according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a heating state of a single-stage subcritical carbon dioxide multi-split air conditioning system according to an embodiment of the present utility model.
Fig. 3 is a schematic diagram of a bi-directional evaporative heat exchanger.
In the figure: 1. a bi-directional evaporative heat exchanger; 100. a closed housing; 101. a centrifugal fan; 102. a heat exchange tube group; 103. an atomizing nozzle; 104. electric roller shutter; 105. a grid plate; 2. a compressor; 3. a liquid flow pipe; 4. a gas flow pipe; 5. a four-way reversing valve; 6. a reservoir; 7. a regulating valve; 8. a thermometer; 9. a one-way valve; 10. a domestic hot water tank; 11. a fan coil; 12. floor heating; 13. a cold and heat accumulator.
Detailed Description
The utility model will now be described in detail with reference to the following examples and the accompanying drawings, it being pointed out that the examples described are intended only to facilitate an understanding of the utility model and are not intended to be limiting in any way.
Referring to fig. 1 and 2, the single-stage subcritical carbon dioxide multi-split air-conditioning system provided by the embodiment comprises a compressor 2, a bidirectional evaporation heat exchanger 1, a liquid storage device 6, a four-way reversing valve 5, a liquid flow pipe 3 and a gas flow pipe 4, wherein four interfaces of the four-way reversing valve 5 are respectively connected with an air suction end of the compressor 2, an air discharge end of the compressor 2, the bidirectional evaporation heat exchanger 1 and the gas flow pipe 4, the bidirectional evaporation heat exchanger 1 is connected with the liquid storage device 6, the liquid storage device 6 is connected with the liquid flow pipe 3, and terminal components are respectively connected with the liquid flow pipe 3 and the gas flow pipe 4; referring to fig. 1, in the refrigeration mode, the four-way reversing valve 5 connects the exhaust end of the compressor 2 with the bi-directional evaporation heat exchanger 1, and connects the suction end of the carbon dioxide compressor 2 with the gas flow pipe 4; referring to fig. 2, in the heating mode, the four-way reversing valve 5 connects the exhaust end of the compressor 2 to the gas flow pipe 4, and connects the suction end of the carbon dioxide compressor 2 to the bi-directional evaporative heat exchanger 1. The compressor 2, the bidirectional evaporation heat exchanger 1, the liquid storage device 6 and the tail end of the cold and hot system form a carbon dioxide single-stage circulation system, and the carbon dioxide single-stage circulation system runs below the critical point (subcritical) of the condensation temperature. The embodiment uses carbon dioxide medium as the refrigerating medium of the cold and hot system, and uses carbon dioxide as the circulating working medium, thereby having the advantages of large pressure difference, good fluidity, small density and trans-critical phase change, and being more obvious in effect when being used for high-rise buildings. The meaning of single stage is distinguished from a cascade system in that only carbon dioxide medium is used for circulation without cascade. The cold and hot system of this embodiment uses carbon dioxide as the working medium, can be for higher floor cooling or heating in vertical height, can circulate farther distance in the floor of plane use, can drive more indoor set work.
According to the single-stage subcritical carbon dioxide multi-split cooling and heating system, through arranging the liquid flow pipe 3, the gas flow pipe 4 and the four-way reversing valve 5 and improving the connection mode of the bidirectional evaporation heat exchanger 1 and the compressor 2 and the liquid flow pipe 3, the gas flow pipe 4 and the four-way reversing valve 5, the tail end heating component or the tail end refrigerating component is connected with the liquid flow pipe 3 and the gas flow pipe 4, various working modes of refrigerating and heating switching, partial tail end refrigerating and partial tail end heating in one set of system can be realized, the diversity of the overall operation condition of the multi-split cooling and heating system is improved under the condition that a complex refrigerant switching pipeline is not added, different requirements of different crowds on comfort are met, and the cooling and heating requirements of different tail ends are met, namely, the various cooling and heating requirements of one building complex are met through one set of system. Further improves the efficiency of the system, greatly reduces the power consumption, and really realizes energy conservation and environmental protection. Further, components such as a cold and heat accumulator 13 (such as a cold and heat accumulating swimming pool) can be arranged to ensure the efficient and safe operation of the system.
Referring to fig. 1, a regulating valve 7 is arranged on a pipeline between the bi-directional evaporation heat exchanger 1 and the liquid storage device 6. The domestic hot water tank 10 is arranged on a pipeline between the compressor 2 and the four-way reversing valve 5, the regulating valve 7 is arranged at the inlet end and the outlet end of the domestic hot water tank 10, and the thermometer 8 is arranged at the outlet end. When the central air conditioner needs to refrigerate, the hot water supply device can cool the carbon dioxide hot gas, so that the heat exchange efficiency of the heat exchanger is increased, domestic hot water can be simultaneously taken, the refrigeration pressure of the refrigeration system is reduced, and the energy is saved. By this arrangement, it is possible to ensure a sufficient domestic hot water supply.
A bidirectional evaporative heat exchanger refers to one device capable of switching between a cooling mode and a heating mode or a combination of a separate cooling component and a separate heating component. Referring to fig. 3, preferably, the bidirectional evaporation heat exchanger 1 includes a closed casing 100, a centrifugal fan 101, a heat exchange tube set 102 and an atomizer 103, where the centrifugal fan 101 is disposed on one side of the closed casing 100, the atomizer 103 and the heat exchange tube set 102 are disposed in the closed casing 100, the centrifugal fan 101 is used to suck water vapor or air in the closed casing 100, the water vapor or air in the closed casing 100 exchanges heat with a refrigerant flowing in the heat exchange tube set 102, an electric roller shutter 104 is disposed on one side of the closed casing 100, and opening or closing of the electric roller shutter 104 is used to switch a heating state or a cooling state of the heat exchanger. By arranging the electric roller blind 104 and matching with the flowing direction of the refrigerant, the switching of the heating state or the refrigerating state can be completed by using one set of equipment, and the equipment cost and the system complexity are reduced. The atomizing nozzle 103 is connected with a high-pressure water pipe, and the atomizing nozzle 103 is used for generating atomized water; the centrifugal fan 101 is a backward inclined centrifugal fan 101; a grid plate 105 is provided on one side of the roller blind. During refrigeration (such as summer), the electric roller shutter 104 is closed to prevent air from entering, high-pressure atomized water runs, and the bidirectional evaporation heat exchanger 1 is used as a flash evaporation condenser; after the electric roller shutter 104 is closed, the centrifugal fan 101 continuously discharges water vapor in the closed shell 100 out of the closed shell 100, a needed negative pressure environment is formed in the accommodating cavity, atomized water generated by the atomizing nozzle 103 exchanges heat with high-temperature refrigerant in the heat exchange tube group 102 in the negative pressure environment of the accommodating cavity, the water vapor is quickly flashed, the water mist is changed into steam, heat is absorbed, the environmental temperature in the closed shell 100 is reduced, and the refrigerant is liquefied and condensed. When heating (such as winter), the electric roller shutter 104 is retracted to intake air, the high-pressure atomized water is closed, and the bidirectional evaporation heat exchanger 1 is used as an evaporator; after the electric roller shutter 104 is opened, the outside air exchanges heat with the low-temperature refrigerant in the heat exchange tube group 102, and the refrigerant is gasified and evaporated. In the refrigeration mode, the bi-directional evaporation heat exchanger 1 does not circulate and recycle the water vapor after heat exchange, and is directly discharged to the atmosphere. When the closed shell 100 is used for refrigerating, heat exchange is carried out in the closed shell, air is hardly supplied, and when the external temperature and the external humidity are high, the heat exchange effect is not affected by the external temperature and the external humidity.
Referring to fig. 1 and 2, the tail end assembly comprises a fan coil 11, inlet and outlet ends of the fan coil 11 are respectively connected with a liquid flow pipe 3 and a gas flow pipe 4, thermometers 8 are arranged on inlet and outlet pipelines of the fan coil 11, and a regulating valve 7 is arranged on one pipeline. The thermometer 8 is used for feeding back temperature and adjusting refrigerating capacity or heating capacity. The cooling state is opposite to the heating state in the flow direction of the refrigerant, as indicated by arrows in fig. 1 and 2. The tail end assembly comprises a floor heating device 12, an inlet end and an outlet end of the floor heating device 12 are respectively connected with the liquid runner pipe 3 and the gas runner pipe 4, regulating valves 7 are arranged on inlet and outlet pipelines of the floor heating device 12, and a one-way valve 9 and a thermometer 8 are arranged at the outlet end. The check valve 9 can avoid liquid refrigerant from flowing back, and the thermometer 8 is used for feeding back temperature and adjusting heating quantity. When the system is in a refrigerating state, the regulating valve 7 is closed, and the floor heating 12 does not work. The floor heating 12 is a parallel multi-row pipeline arranged in a plurality of rooms, the floor heating 12 comprises an air supply pipe, a liquid return pipe and a plurality of branch pipes, the branch pipes are outwards bent for a plurality of circles and are coiled in the floor, the floor comprises a concrete slab, a reflecting layer, a steel wire net sheet, a heat storage layer and a ground brick layer which are sequentially paved, the branch pipes are fixed on the steel wire net sheet through clamping rings and are abutted to the coil pipe layer, the reflecting layer is specifically made of aluminum foil or an extrusion molding heat insulation board with the aluminum foil, and the aluminum foil transmits heat radiated by the branch pipes to the upper end of the reflecting layer in a reflecting mode, so that uniform heat conduction is realized. The heat accumulating layer is formed by mixing cobblestones, sand and cement, the cobblestones have good heat conducting performance, the appearance is smooth and has no edges and corners, and the heat accumulating layer is beneficial to protecting the branch pipes while fully transferring heat. Carbon dioxide is adopted as a medium to conduct heat transfer to the ground, carbon dioxide has good heat conductivity, in the heat transfer process, carbon dioxide enters the branch pipe from the air supply pipe in a gaseous form, the temperature is reduced and converted into liquid after heat exchange with the floor in the branch pipe, and the liquid flows out of the liquid return pipe.
Referring to fig. 1, the end assembly comprises a cold and heat accumulator 13, inlet and outlet ends of the cold and heat accumulator 13 are respectively connected with a liquid runner pipe 3 and a gas runner pipe 4, and inlet and outlet pipelines of the cold and heat accumulator 13 are respectively provided with a thermometer 8 and a regulating valve 7. The cold and heat accumulator 13 can be a swimming pool, and the system can heat the water in the swimming pool to a temperature suitable for swimming; the swimming pool is used as a condenser to discharge the heat of the room when the cooling capacity requirement of the room is large and the system does not meet the use requirement; when the heat required by the room is large and the system does not meet the use requirement, the swimming pool is used as an evaporator, and heat is extracted from the swimming pool to be supplied to the room. The cold and hot system can be used for preparing domestic hot water in a multi-purpose way; further, the cold-storage heat accumulator 13 plays an important balance role in the cold-hot system, the cold-storage heat accumulator 13 can be a swimming pool, the advantages of great latent heat of water are utilized to store heat and store cold, the swimming pool is economical and convenient, a required temperature range can be set, when the heat of the cold-hot system is surplus, the heat of the cold-hot system is supplemented into the swimming pool to heat the swimming pool, and when the cold of the cold-hot system is surplus, the cold of the cold-hot system is supplemented into the swimming pool to cool the swimming pool; according to the requirements of the cold and hot system, the cold and heat can be taken out from the swimming pool for use. The efficient operation of the cold and hot system can be ensured, the rich cold and the rich heat are not wasted, and the cold and the heat are obtained according to the requirement. Night valley electricity can be fully utilized, and impact on a local power grid is reduced.
In this embodiment, the regulator valve may be a solenoid valve or an electronic expansion valve.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (10)
1. The utility model provides a cold and hot system of many online of single-stage subcritical carbon dioxide, includes compressor, two-way evaporation heat exchanger, reservoir, cross switching-over valve, liquid runner pipe and gas runner pipe, its characterized in that: four interfaces of the four-way reversing valve are respectively connected with a compressor suction end, a compressor exhaust end, a bidirectional evaporation heat exchanger and a gas runner pipe, the bidirectional evaporation heat exchanger is connected with a liquid reservoir, the liquid reservoir is connected with a liquid runner pipe, and a tail end component is respectively connected with the liquid runner pipe and the gas runner pipe; in a refrigeration mode, the four-way reversing valve conducts the exhaust end of the compressor with the bidirectional evaporation heat exchanger, and conducts the suction end of the carbon dioxide compressor with the gas flow pipe; in the heating mode, the four-way reversing valve conducts the exhaust end of the compressor with the gas flow pipe, and conducts the air suction end of the carbon dioxide compressor with the bidirectional evaporation heat exchanger.
2. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: the compressor, the bidirectional evaporation heat exchanger, the liquid accumulator and the tail end of the cold and hot system form a carbon dioxide single-stage circulating system, and the carbon dioxide single-stage circulating system operates below a critical point of condensation temperature.
3. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: and a regulating valve is arranged on a pipeline between the bidirectional evaporation heat exchanger and the liquid storage device.
4. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: the domestic hot water tank is arranged on a pipeline between the compressor and the four-way reversing valve, the inlet end and the outlet end of the domestic hot water tank are provided with regulating valves, and the outlet end is provided with a thermometer.
5. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: the bidirectional evaporation heat exchanger comprises a closed shell, a centrifugal fan, a heat exchange tube group and an atomization spray head, wherein the centrifugal fan is arranged on one side of the closed shell, the atomization spray head and the heat exchange tube group are arranged in the closed shell, the centrifugal fan is used for sucking water vapor or air in the closed shell, the water vapor or air in the closed shell exchanges heat with a refrigerant flowing in the heat exchange tube group, an electric roller shutter is arranged on one side of the closed shell, and the opening or closing of the electric roller shutter is used for switching the heating state or the refrigerating state of the heat exchanger.
6. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 5, wherein: the atomizing nozzle is connected with the high-pressure water pipe; the centrifugal fan is a backward inclined centrifugal fan; one side of the rolling curtain is provided with a grid plate.
7. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: the tail end assembly comprises a fan coil, the inlet and outlet ends of the fan coil are respectively connected with the liquid flow pipe and the gas flow pipe, the inlet and outlet pipelines of the fan coil are respectively provided with a thermometer, and one pipeline is provided with a regulating valve.
8. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: the tail end assembly comprises a floor heater, an inlet and outlet end of the floor heater is respectively connected with the liquid flow pipe and the gas flow pipe, regulating valves are arranged on inlet and outlet pipelines of the floor heater, and a one-way valve and a thermometer are arranged at an outlet end of the floor heater.
9. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 8, wherein: the floor heating is a parallel multi-row pipeline arranged in a plurality of rooms, the floor heating pipe comprises an air supply pipe, a liquid return pipe and a plurality of branch pipes, the branch pipes are outwards bent for a plurality of circles continuously and are coiled in the floor, the floor comprises a concrete slab, a reflecting layer, a steel wire net sheet, a heat storage layer and a floor brick layer which are paved in sequence, and the branch pipes are fixed on the steel wire net sheet through clamping rings and are abutted with the coil pipe layer.
10. The single-stage subcritical carbon dioxide multi-split air conditioning system of claim 1, wherein: the tail end assembly comprises a cold and heat accumulator, the inlet and outlet ends of the cold and heat accumulator are respectively connected with the liquid runner pipe and the gas runner pipe, and the inlet and outlet pipelines of the cold and heat accumulator are respectively provided with a thermometer and a regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322042597.3U CN220541410U (en) | 2023-08-01 | 2023-08-01 | Single-stage subcritical carbon dioxide multi-split air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322042597.3U CN220541410U (en) | 2023-08-01 | 2023-08-01 | Single-stage subcritical carbon dioxide multi-split air conditioning system |
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| Publication Number | Publication Date |
|---|---|
| CN220541410U true CN220541410U (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322042597.3U Active CN220541410U (en) | 2023-08-01 | 2023-08-01 | Single-stage subcritical carbon dioxide multi-split air conditioning system |
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| Country | Link |
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| CN (1) | CN220541410U (en) |
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2023
- 2023-08-01 CN CN202322042597.3U patent/CN220541410U/en active Active
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