CN219976620U - Cold accumulation air conditioning system and air conditioner - Google Patents
Cold accumulation air conditioning system and air conditioner Download PDFInfo
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- CN219976620U CN219976620U CN202321386383.1U CN202321386383U CN219976620U CN 219976620 U CN219976620 U CN 219976620U CN 202321386383 U CN202321386383 U CN 202321386383U CN 219976620 U CN219976620 U CN 219976620U
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- 238000009825 accumulation Methods 0.000 title claims abstract description 176
- 238000004378 air conditioning Methods 0.000 title claims abstract description 77
- 239000003507 refrigerant Substances 0.000 claims abstract description 75
- 238000005057 refrigeration Methods 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 abstract description 13
- 230000008020 evaporation Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a cold accumulation air conditioning system and an air conditioner, wherein the cold accumulation air conditioning system comprises: the main circulation loop comprises a compressor, an outdoor heat exchanger and an indoor heat exchange device which are sequentially connected; the cold accumulation device can be connected with the indoor heat exchange device in parallel or in series; the adjusting tank has a gas-liquid separation function, participates in refrigerant circulation when the cold accumulation device is connected with the indoor heat exchange device in series for cold accumulation, and is used for providing liquid refrigerant for the cold accumulation device. The indoor heat exchange device and the cold accumulation device can realize two different evaporation temperatures so as to meet the operation when the indoor heat exchange device and the cold accumulation device have refrigeration requirements and cold accumulation requirements at the same time, and achieve the effect of high-efficiency refrigeration and cold accumulation.
Description
Technical Field
The utility model relates to the technical field of cold accumulation air conditioners, in particular to a cold accumulation air conditioning system and an air conditioner.
Background
The cold accumulation air conditioning system generally comprises a refrigerating device and a cold accumulation device, wherein the refrigerating device utilizes low valley point refrigeration at night to store cold energy in the form of cold water or solidified phase change material, and the stored cold energy is partially or completely utilized to supply cold to the air conditioning system in peak load time so as to achieve the purposes of reducing the installation capacity of the refrigerating device, reducing the running cost and reducing peak load and valley load.
The cold accumulation air conditioning system in the prior art has various forms, takes an ice accumulation air conditioning system with double evaporators as an example, uses a three-way valve and an ejector to enable an ice accumulation device to be connected in the air conditioning system, and starts ice accumulation until ice accumulation is completed while maintaining indoor constant temperature when an air conditioner and ice making working condition are operated, namely the air conditioning system can realize refrigeration and cold accumulation simultaneously, however, the indoor heat exchanger needs to keep the evaporating temperature of about 13 ℃ for comfort, and the evaporating temperature of below 0 ℃ needs to be kept in the cold accumulator for ice making, so that the difference between the two is large, but the reasonable distribution of a refrigerant in the two evaporators cannot be ensured only by the three-way valve, and high-efficiency refrigeration cold accumulation is difficult to realize.
Disclosure of Invention
In order to solve the defect that the existing cold accumulation air conditioning system is difficult to consider the refrigeration requirement and the cold accumulation requirement, the utility model provides the cold accumulation air conditioning system and the air conditioner, the cold accumulation state of the cold accumulation device can be flexibly switched, and the indoor heat exchange device and the cold accumulation device can realize two different evaporation temperatures so as to meet the operation when the refrigeration requirement and the cold accumulation requirement are met at the same time, and the effect of high-efficiency refrigeration and cold accumulation is achieved.
The utility model adopts the technical proposal that the cold accumulation air conditioning system is designed and comprises:
the main circulation loop comprises a compressor, an outdoor heat exchanger and an indoor heat exchange device which are sequentially connected;
the cold accumulation device can be connected with the indoor heat exchange device in parallel or in series;
the adjusting tank has a gas-liquid separation function, participates in refrigerant circulation when the cold accumulation device is connected with the indoor heat exchange device in series for cold accumulation, and is used for providing liquid refrigerant for the cold accumulation device.
Further, the indoor heat exchange device comprises an indoor heat exchanger and an indoor throttle valve arranged at the refrigerating inlet side of the indoor heat exchanger, and is arranged on an indoor pipeline positioned in the main circulation loop; the cold accumulation device comprises a cold accumulator and a cold accumulation throttle valve arranged at the cold accumulation inlet side of the cold accumulator, and is arranged on a cold accumulation pipeline connected with the indoor pipeline in parallel; the adjusting tank is arranged on an adjusting pipeline connected in series between the refrigerating outlet side of the indoor heat exchanger and the cold accumulation throttle valve; wherein, the inlet and outlet branch of each pipeline is provided with a control valve for adjusting the on-off state so as to switch the running mode of the cold accumulation air conditioning system.
Further, the operation mode of the cold accumulation air conditioning system includes at least one of a normal air conditioning mode, a single cold accumulation mode, a first refrigeration and cold accumulation mode, and a second refrigeration and cold accumulation mode;
when the cold accumulation air conditioning system is in the conventional air conditioning mode, the inlet and outlet branches of the cold accumulation pipeline and the inlet and outlet branches of the adjusting pipeline are both turned off, and only the indoor heat exchange device participates in the refrigerant circulation of the main circulation loop;
and/or when the cold accumulation air conditioning system is in the independent cold accumulation mode, the inlet and outlet branches of the indoor pipeline and the inlet and outlet branches of the adjusting pipeline are both shut off, and only the cold accumulation device participates in the refrigeration cycle of the main circulation loop;
and/or when the cold accumulation air conditioning system is in the first refrigeration and cold accumulation mode, the inlet and outlet branches of the adjusting pipeline are turned off, and the cold accumulation device and the indoor heat exchange device are connected in parallel to participate in the refrigeration cycle of the main circulation loop;
and/or when the cold accumulation air conditioning system is in the second refrigeration and cold accumulation mode, the inlet and outlet branches of the adjusting pipeline are turned off, the indoor heat exchange device, the adjusting tank and the cold accumulation device are sequentially connected in series to participate in the refrigeration cycle of the main circulation loop, and the indoor heat exchange device is positioned at the upstream of the adjusting tank.
Further, the main circulation loop also comprises a four-way valve for switching the flow direction of the refrigerant, and four ports of the four-way valve are respectively connected with the exhaust side of the compressor, the suction side of the compressor, the refrigeration inlet side of the outdoor heat exchanger and the refrigeration outlet side of the indoor heat exchanger;
the conventional air conditioning mode includes a separate cooling mode and a separate heating mode; when the cold accumulation air conditioning system is in an independent refrigeration mode, the indoor heat exchanger participates in the refrigeration cycle of the main circulation loop; when the cold accumulation air conditioning system is in an independent heating mode, the indoor heat exchanger participates in the heating cycle of the main circulation loop.
Further, a cold release pipeline with an adjustable on-off state is further connected between the cold accumulator and the indoor heat exchanger, the cold release pipeline comprises a cold release inlet branch and a cold release outlet branch, one end of the cold release inlet branch is connected to the cold accumulation inlet side of the cold accumulation throttle valve, the other end of the cold release outlet branch is connected to the cold accumulation outlet side of the cold accumulator, and the other end of the cold release outlet branch is connected to the cold accumulation outlet side of the cold accumulation throttle valve.
In some embodiments, the cool-releasing inlet branch is provided with a control valve for adjusting the on-off state, and the cool-releasing outlet branch is provided with a one-way valve which only allows the refrigerant to flow to the refrigerating inlet side of the indoor throttle valve.
Further, the operation mode of the cold accumulation air conditioning system further comprises a cold release mode; when the cold accumulation air conditioning system is in a cold release mode, the inlet and outlet branches of the adjusting pipeline are turned off, the cold accumulator and the indoor heat exchange device are connected in series to participate in the refrigeration cycle of the main circulation loop, and the cold accumulator is positioned at the upstream of the indoor heat exchange device.
Further, the compressor has a make-up port, and the gas outlet of the surge tank is connected to the make-up port through a first make-up outlet branch.
Further, the main circulation loop further comprises a gas-liquid separator, the gas-liquid separator is connected between the refrigerating outlet side of the indoor heat exchange device and the air suction side of the compressor, the air outlet of the adjusting tank is connected to the inlet of the gas-liquid separator through a second air supplementing outlet branch, and the second air supplementing outlet branch is provided with an air supplementing throttle valve.
The utility model also provides an air conditioner, which adopts the cold accumulation air conditioning system.
Compared with the prior art, the utility model has the following beneficial effects:
1. two different evaporating temperatures can be realized in the indoor heat exchanger and the cold accumulator so as to meet the operation when the indoor heat exchanger and the cold accumulator have refrigeration requirements and cold accumulation requirements at the same time;
2. the cold accumulation air conditioning system has different operation modes and can be flexibly switched according to actual use requirements.
Drawings
The utility model is described in detail below with reference to examples and figures, wherein:
FIG. 1 is a schematic diagram of the connection of a cold storage air conditioning system of the present utility model;
FIG. 2 is a schematic diagram of the refrigerant flow in the single cooling mode according to the present utility model;
FIG. 3 is a schematic diagram of the flow of refrigerant in the single cold accumulation mode according to the present utility model;
FIG. 4 is a schematic diagram of the flow direction of the refrigerant in the first cooling and cold accumulation mode according to the present utility model;
FIG. 5 is a schematic diagram of the flow direction of the refrigerant in the second cooling and cold accumulation mode according to the present utility model;
FIG. 6 is a schematic diagram illustrating the flow of refrigerant in the cool release mode according to the present utility model;
FIG. 7 is a schematic diagram of the flow direction of the refrigerant in the heating mode according to the present utility model;
reference numerals illustrate: 1. a compressor; 2. a four-way valve; 3. an outdoor heat exchanger; 4. an outdoor throttle valve; 5. supercooling throttle valve; 6. a subcooler; 7. an air supplementing throttle valve; 8. a gas-liquid separator; 9. a supercooling control valve; 10. a first indoor control valve; 11. a first cold accumulation control valve; 12. a cool release control valve; 13. a second cold accumulation control valve; 14. a cold accumulation throttle valve; 15. a regenerator; 16. a second regulation control valve; 17. a one-way valve; 18. an indoor throttle valve; 19. an indoor heat exchanger; 20. a first regulation control valve; 21. an adjustment tank; 22. and a second indoor control valve.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, the cold-storage air conditioning system according to the present utility model includes a main circulation circuit, a cold-storage device, and an adjustment tank, wherein the main circulation circuit includes a compressor 1, an outdoor heat exchanger 3, an indoor heat exchanger, and the like, which are sequentially connected, the indoor heat exchanger generally includes an indoor heat exchanger 19 and an indoor throttle valve 18, the indoor throttle valve 18 is installed on a cooling inlet side of the indoor heat exchanger 19, the cold-storage device generally includes a cold storage device 15 and a cold-storage throttle valve 14, and the cold-storage throttle valve 14 is installed on a cold-storage inlet side of the cold storage device 15.
The cold accumulation device can be connected in parallel or in series with the indoor heat exchange device, so that independent cold accumulation or cold accumulation is realized when the indoor heat exchange device refrigerates, the adjusting tank 21 has a gas-liquid separation function, the adjusting tank 21 is provided with an inlet, a liquid outlet and a gas outlet, pipelines where the inlet and the liquid outlet are located extend to the bottom of the adjusting tank 21, the inlet and the liquid outlet are located at the bottom of the adjusting tank 21, and the gas outlet is located at the upper part of the adjusting tank 21, so that the liquid refrigerant is sent out from the liquid outlet and the gaseous refrigerant is sent out from the gas outlet.
When the cold accumulation device is connected in parallel with the indoor heat exchange device to accumulate cold, the adjusting tank 21 is disconnected with the cold accumulation device and the indoor heat exchange device, and part of refrigerant flowing out of the outdoor heat exchanger 3 enters the cold accumulation device and the other part of refrigerant enters the indoor heat exchange device; when the cold accumulation device is connected in series with the indoor heat exchange device to accumulate cold, the adjusting tank 21 is connected between the cold accumulation device and the indoor heat exchange device, specifically, receives the refrigerant output by the indoor heat exchange device and provides the liquid refrigerant to the cold accumulation device, so that two different evaporation temperatures are realized in the indoor heat exchanger 19 and the cold accumulator 15 to meet the efficient operation when the refrigeration requirement and the cold accumulation requirement are met at the same time.
The main circulation loop is provided with an outdoor pipeline and an indoor pipeline, the outdoor pipeline is usually the pipeline where the compressor 1 and the outdoor heat exchanger 3 are located, the indoor pipeline is usually the pipeline where the indoor heat exchange device is located, the indoor pipeline is connected between the refrigeration outlet side of the outdoor heat exchanger 3 and the air suction side of the compressor 1, the connection relation of the cold accumulation device, the adjusting tank 21 and the indoor heat exchange device is switched through the pipeline, the pipeline structure can be designed according to actual requirements, and the serial-parallel connection of the cold accumulation device and the indoor heat exchange device can be adjusted.
Taking one possible scheme provided by the utility model as an example, the cold accumulation device is arranged on a cold accumulation pipeline, the cold accumulation pipeline and the indoor pipeline are arranged in parallel, namely, the cold accumulation device is connected between the refrigeration outlet side of the outdoor heat exchanger 3 and the air suction side of the compressor 1 through the cold accumulation pipeline, the adjusting tank 21 is arranged on an adjusting pipeline, and the adjusting pipeline is connected between the refrigeration outlet side of the indoor heat exchanger 19 and the cold accumulation throttle valve 14 in series. Each pipeline is provided with an inlet branch and an outlet branch, the refrigerating inlet branch of the indoor pipeline is connected with the refrigerating inlet side of the indoor throttle valve 18 and the refrigerating outlet side of the outdoor heat exchanger 3, the refrigerating outlet branch of the indoor pipeline is connected with the refrigerating outlet side of the indoor heat exchanger 19 and the air suction side of the compressor 1, the inlet branch of the cold storage pipeline is connected with the cold storage inlet side of the cold storage throttle valve 14 and the refrigerating outlet side of the outdoor heat exchanger 3, the outlet branch of the cold storage pipeline is connected with the cold storage outlet side of the cold storage device 15 and the air suction side of the compressor 1, the inlet branch of the adjusting pipeline is connected with the refrigerating outlet side of the indoor heat exchanger 19 and the inlet of the adjusting tank 21, the outlet branch of the adjusting pipeline and the inlet and outlet branch of the adjusting pipeline are respectively provided with a control valve, and the on-off state of the branch where the indoor pipeline, the cold storage pipeline and the inlet and the outlet branch of the adjusting pipeline are regulated by the control valves so as to switch the running modes of the cold storage air conditioning system.
Based on the serial-parallel relationship between the cold accumulation device and the indoor heat exchange device, the cold accumulation air conditioning system can operate in any one of a conventional air conditioning mode, a single cold accumulation mode, a first refrigeration simultaneous cold accumulation mode and a second refrigeration simultaneous cold accumulation mode, and in practical application, the conventional air conditioning mode and at least one other mode can be selectively designed in the cold accumulation air conditioning system, for example, the operation mode of the cold accumulation air conditioning system can only comprise the conventional air conditioning mode, the first refrigeration simultaneous cold accumulation mode and the second refrigeration simultaneous cold accumulation mode, and the operation mode of the cold accumulation air conditioning system can only comprise the conventional air conditioning mode, the single cold accumulation mode, the first refrigeration simultaneous cold accumulation mode and the second refrigeration simultaneous cold accumulation mode.
When the cold accumulation air conditioning system is in a conventional air conditioning mode, an inlet and outlet branch of the indoor pipeline is connected, an inlet and outlet branch of the cold accumulation pipeline and an inlet and outlet branch of the adjusting pipeline are all disconnected, only the indoor heat exchanger 19 participates in the refrigerant circulation of the main circulation loop, the refrigerant flowing out of the outdoor heat exchanger 3 is all sent to the indoor throttle valve 18, the refrigerant enters the indoor heat exchanger 19 after being throttled, the indoor heat exchanger 19 provides cold energy for the indoor, and the refrigerant flowing out of the indoor heat exchanger 19 is then sent back to the air suction side of the compressor 1;
when the cold accumulation air conditioning system is in a single cold accumulation mode, the inlet and outlet branches of the indoor pipeline and the inlet and outlet branches of the adjusting pipeline are both turned off, the inlet and outlet branches of the cold accumulation pipeline are turned on, only the cold accumulator 15 participates in the refrigeration cycle of the main circulation loop, the refrigerant flowing out of the outdoor heat exchanger 3 is all sent to the cold accumulation throttle valve 14, the refrigerant enters the cold accumulator 15 after being throttled, cold accumulation medium of the cold accumulator 15 absorbs cold energy of the refrigerant to store cold, and the refrigerant flowing out of the cold accumulator 15 is then sent back to the suction side of the compressor 1;
when the cold accumulation air conditioning system is in a first refrigeration and cold accumulation mode, an inlet and outlet branch of an indoor pipeline and an inlet and outlet branch of a cold accumulation pipeline are connected, an inlet and outlet branch of an adjusting pipeline is disconnected, the cold accumulator 15 and the indoor heat exchanger 19 are connected in parallel to participate in the refrigeration cycle of a main circulation loop, a part of refrigerant flowing out of the outdoor heat exchanger 3 is sent to an indoor throttle valve 18, the refrigerant enters the indoor heat exchanger 19 after being throttled, cold energy is provided for the indoor through the indoor heat exchanger 19, another part of refrigerant flowing out of the outdoor heat exchanger 3 is sent to the cold accumulation throttle valve 14, the refrigerant enters the cold accumulator 15 after being throttled, cold energy of the refrigerant is absorbed by a cold accumulation medium of the cold accumulator 15 to be accumulated, and the refrigerant flowing out of the indoor heat exchanger 19 and the cold accumulator 15 is returned to the air suction side of the compressor 1 after being converged;
when the cold accumulation air conditioning system is in the second refrigeration and cold accumulation mode, the refrigeration outlet branch of the indoor pipeline and the inlet branch of the cold accumulation pipeline are both turned off, the refrigeration inlet branch of the indoor pipeline is turned on, the outlet branch of the cold accumulation pipeline is turned on, the inlet and outlet branch of the adjusting pipeline is turned on, the indoor heat exchanger 19, the adjusting tank 21 and the cold accumulator 15 are sequentially connected in series to participate in the refrigeration cycle of the main circulation loop, the refrigerant flowing out of the outdoor heat exchanger 3 is all sent to the indoor throttle valve 18, the refrigerant enters the indoor heat exchanger 19 after being throttled, the cold energy is provided for the indoor through the indoor heat exchanger 19, the refrigerant flowing out of the indoor heat exchanger 19 is all sent to the adjusting tank 21, the liquid refrigerant is provided for the cold accumulation throttle valve 14 through the liquid outlet of the adjusting tank 21, the refrigerant enters the cold accumulator 15 after being throttled, the cold energy of the cold accumulation medium of the cold accumulator 15 absorbs the cold energy of the refrigerant for cold accumulation, and the refrigerant flowing out of the cold accumulator 15 is then sent back to the air suction side of the compressor 1.
It should be understood that the conventional air conditioning mode is determined according to the refrigerant circulation direction of the air conditioning system, and generally includes a separate cooling mode, that is, the refrigerant circulates in the main circulation loop.
As shown in fig. 1, in order to enable the cold storage air conditioning system to meet more usage demands, in some embodiments of the present utility model, the main circulation loop further includes a four-way valve 2 for switching the flow direction of the refrigerant, and four ports of the four-way valve 2 are respectively connected to the discharge side of the compressor 1, the suction side of the compressor 1, the refrigeration inlet side of the outdoor heat exchanger 3, and the refrigeration outlet side of the indoor heat exchanger 19. In this embodiment, the conventional air conditioning mode includes a single cooling mode and a single heating mode, and when the cool storage air conditioning system is in the single cooling mode, the indoor heat exchanger 19 participates in the cooling cycle of the main circulation loop; when the cold storage air conditioning system is in the individual heating mode, the indoor heat exchanger 19 participates in the heating cycle of the main circulation loop, and it should be understood that, in the heating cycle, the above-mentioned refrigerating inlet branch of the indoor pipeline corresponds to the heating outlet branch, which connects the heating outlet side of the indoor throttle 18 with the heating inlet side of the outdoor heat exchanger 3, and the above-mentioned refrigerating outlet branch of the indoor pipeline corresponds to the heating inlet branch, which connects the heating inlet side of the indoor heat exchanger 19 with the exhaust side of the compressor 1.
In the preferred embodiment of the present utility model, a cold release pipeline capable of adjusting the on-off state is further connected between the regenerator 15 and the indoor heat exchanger 19, the cold release pipeline comprises a cold release inlet branch and a cold release outlet branch, one end of the cold release inlet branch is connected to the cold storage inlet side of the cold storage throttle valve 14, the other end of the cold release outlet branch is connected to the cold storage outlet side of the regenerator 15, and one end of the cold release outlet branch is connected to the cold storage outlet side of the cold storage throttle valve 14, and the other end of the cold release outlet branch is connected to the refrigeration inlet side of the indoor throttle valve 18.
It should be understood that the on-off state of the cold release pipeline is regulated by the control valve, that is, the control valve is installed at both the cold release inlet branch and the cold release outlet branch, but the preferred scheme is that the check valve 17 is installed at the cold release outlet branch instead of the control valve, the check valve 17 only allows the refrigerant to flow to the refrigerating inlet side of the indoor throttle valve 18, when the indoor inlet branch of the indoor pipeline is connected, the pressure of one end of the cold release outlet branch connected to the refrigerating inlet side of the indoor throttle valve 18 is higher, the refrigerant cannot flow from the low pressure end to the high pressure end, and the flow direction from the high pressure end to the low pressure end is blocked at the check valve 17, which is equivalent to the fact that the cold release outlet branch is turned off, compared with the control valve, the check valve 17 can realize the same on-off switching function, the cost of the check valve 17 is lower, and the control logic is simpler.
Based on the cold release pipeline, the running mode of the cold accumulation air conditioning system also comprises a cold release mode; when the cold accumulation air conditioning system is in a cold release mode, the inlet and outlet branches of the adjusting pipeline are turned off, the cold accumulator 15 and the indoor heat exchanger 19 are connected in series to participate in the refrigeration cycle of the main circulation loop, the cold accumulator 15 is positioned at the upstream of the indoor heat exchange device, the refrigerant output by the outdoor heat exchanger 3 is directly sent to the cold accumulator 15 for supercooling without passing through the cold accumulation throttle valve 14, and the refrigerant flowing out of the cold accumulator 15 enters the indoor heat exchanger 19 through the indoor throttle valve 18 and is sent to the air suction side of the compressor 1.
As shown in fig. 1, in the preferred embodiment of the present utility model, the compressor 1 has a gas-compensating port, including but not limited to an enthalpy-injection compressor or a two-stage compressor, and the compressor 1 is capable of performing a primary compression of a refrigerant, and then mixing with the refrigerant entering the gas-compensating port, and performing a secondary compression. The gas outlet of the adjusting tank 21 is connected to the gas supplementing port through a first gas supplementing outlet branch, when the adjusting tank 21 is connected in series with the indoor heat exchange device for cold accumulation, the refrigerant is circulated, and after the refrigerant sent out by the indoor heat exchange device is subjected to gas-liquid separation by the adjusting tank 21, the gaseous refrigerant enters the gas supplementing port of the compressor 1 through the first gas supplementing outlet branch, so that the functions of enthalpy increasing and compression ratio reducing are achieved.
Based on this preferred embodiment, the main circulation loop further comprises a gas-liquid separator 8, the gas-liquid separator 8 being connected between the refrigeration outlet side of the indoor heat exchange device and the suction side of the compressor 1, the gas outlet of the adjustment tank 21 being connected to the inlet of the gas-liquid separator 8 through a second gas-supplementing outlet branch, the second gas-supplementing outlet branch being fitted with a gas-supplementing throttle valve 7, the gas supplementing amount being adjusted by the gas-supplementing throttle valve 7. Namely, the gaseous refrigerant of the adjusting tank is output in two paths, the opening degree of the air supplementing throttle valve 7 is increased, the gaseous refrigerant entering the air supplementing port is reduced when the opening degree of the air supplementing throttle valve 7 is reduced, and the gaseous refrigerant entering the air supplementing port is increased.
In some embodiments of the present utility model, the main circulation loop further comprises a subcooler 6, wherein a main path of the subcooler 6 is connected between a refrigeration outlet side of the outdoor heat exchanger 3 and a refrigeration inlet side of the indoor heat exchange device, and a secondary path of the subcooler 6 is connected between the refrigeration outlet side of the outdoor heat exchanger 3 and an inlet of the gas-liquid separator 8, and the subcooling degree of the refrigerant is improved through the subcooler 6.
In order to facilitate understanding of the various modes of operation of the present utility model, the refrigerant flow and valve state of each mode will be described in detail.
Wherein, outdoor choke valve 4 is installed to outdoor heat exchanger's refrigeration outlet side, and cold-storage choke valve 14 is installed to cold-storage inlet side of cold-storage, and indoor choke valve 18 is installed to indoor heat exchanger's refrigeration inlet side, and first indoor control valve 10 is installed to indoor pipeline's refrigeration inlet branch road, and first cold-storage control valve 11 is installed to cold-storage pipeline's inlet branch road, and cold-release control valve 12 is installed to cold-release inlet branch road, and second cold-storage control valve 13 is installed to cold-storage pipeline's outlet branch road, and second indoor control valve 22 is installed to indoor pipeline's refrigeration outlet branch road, and first adjustment control valve 20 is installed to the inlet branch road of adjustment pipeline, and second adjustment control valve 16 is installed to the outlet branch road of adjustment pipeline.
Individual cooling mode
As shown in fig. 2, in the individual cooling mode, only the indoor heat exchanger is turned on to cool the indoor environment, and the regenerator is not turned on. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 3 through the four-way valve 2 to be condensed, enters the indoor throttle valve 18 through the first indoor control valve 10 to be throttled, evaporates and cools in the indoor heat exchanger 19, and returns to the gas-liquid separator 8 and the compressor 1 through the second indoor control valve 22 and the four-way valve 2.
Single cold accumulation mode
As shown in fig. 3, in the single cold storage mode, only the cold storage device is turned on to store cold, and the indoor heat exchanger is not turned on. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 3 through the four-way valve 2 to be condensed, enters the cold accumulation throttle valve 15 through the first cold accumulation control valve 11 to be throttled, enters the cold accumulation device 15 to be evaporated, transfers the cold energy to the cold accumulation device 15 to store the cold energy, and then returns to the gas-liquid separator 8 and the compressor 1 through the second cold accumulation control valve 13.
First refrigeration and cold accumulation mode
As shown in fig. 4, in the first cooling and cold accumulation mode, the indoor heat exchanger and the cold accumulator are connected in parallel, and the cold amount is accumulated in the cold accumulator while cooling is performed using the indoor heat exchanger. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 3 through the four-way valve 2 to be condensed, is divided into two parts, and one part enters the cold accumulation throttle valve 14 through the first cold accumulation control valve 11 to be throttled, then enters the cold accumulator 15 to be evaporated, and transmits cold energy to the cold accumulator 15 to store cold energy, and then returns to the gas-liquid separator 8 and the compressor 1 through the second cold accumulation control valve 13. The other part of refrigerant enters the indoor throttle valve 18 for throttling through the first indoor control valve 10, evaporates and refrigerates in the indoor heat exchanger 19, is converged with the first part of refrigerant through the second indoor control valve 22 and the four-way valve 2, and returns to the gas-liquid separator 8 and the compressor 1.
For the first refrigeration and cold accumulation mode, the cold accumulator is cooling hot water just after cold accumulation is started, and the freezing degree is not reached, at this time, the evaporation temperature required to be provided is not very low (for example, the water temperature is 30 ℃ at this time, the cold accumulator needs to be cooled by flowing a refrigerant of about 20 ℃, and then the required evaporation temperature, namely, the target evaporation temperature is 20 ℃), and is not much different from or even higher than the target evaporation temperature required by a common refrigeration inner machine.
Second refrigeration and cold accumulation mode
As shown in fig. 5, in the second simultaneous cooling and cold storage mode, the indoor heat exchanger and the cold storage device are connected in series, and the cold storage device stores the cold while cooling with the indoor heat exchanger. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 3 through the four-way valve 2 to be condensed, enters the indoor throttle valve 18 through the first indoor control valve 10 to be throttled, evaporates and refrigerates in the indoor heat exchanger 19, enters the adjusting tank 21 through the first adjusting control valve 20 to be subjected to gas-liquid separation, enters the cold accumulation throttle valve 14 through the second adjusting control valve 16 to be throttled, evaporates in the cold accumulator 15, stores cold accumulation amount of the cold accumulation medium, and returns to the gas-liquid separator 8 and the compressor 1 through the second cold accumulation control valve 13 and the four-way valve 2. The gaseous refrigerant in the adjusting tank 21 enters the air supply port of the compressor 1, and is mixed with the refrigerant subjected to primary compression to perform secondary compression, thereby playing roles of enthalpy increase and compression ratio reduction.
For the second refrigeration and cold accumulation mode, the evaporation temperature required by the cold accumulator is low (for example, the water temperature is reduced to 2 ℃, and the cold medium at about-5 ℃ is required to be provided for cooling the cold accumulator), so that the evaporation temperature is obviously lower than the evaporation temperature required by the refrigeration inner machine.
Cold releasing mode
As shown in fig. 6, in the cool release mode, the regenerator releases the stored cool energy and supplies the cool energy to the indoor heat exchanger to perform cooling. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 3 through the four-way valve 2 to be condensed, passes through the first cold accumulation control valve 11 and the cold release control valve 12, is further supercooled in the cold accumulation device 15, enters the indoor throttle valve 18 through the one-way valve 17 to throttle after the refrigerating capacity is improved, is evaporated in the indoor heat exchanger 19 to perform refrigeration, and is converged with the first part of refrigerant through the second indoor control valve 22 and the four-way valve 2 to return to the gas-liquid separator 8 and the compressor 1. For the cold release mode, cold is generally stored in the low electricity price and released in the peak electricity price so as to reduce the running electricity cost.
Heating mode
As shown in fig. 7, in the heating mode, only the indoor heat exchanger heats, and the regenerator is not turned on. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the indoor heat exchanger 19 through the four-way valve 2 through the second indoor control valve 22, is condensed and heated, throttled by the outdoor throttle valve 4 through the indoor throttle valve 18 and the first indoor control valve 10, evaporated in the outdoor heat exchanger 3, and returned to the gas-liquid separator 8 and the compressor 1 through the four-way valve 2.
The utility model also provides an air conditioner with the cold accumulation air conditioning system, and the operation mode and control logic of the air conditioner are described in detail above.
It is noted that the above-mentioned terms are used merely to describe specific embodiments, and are not intended to limit exemplary embodiments according to the present utility model. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or groups thereof. The order of execution of the operations, steps, and the like in the apparatuses and methods shown in the specification and the drawings may be any order as long as the order is not particularly limited, and the output of the preceding process is not used in the following process. The use of ordinal-like terms for descriptive convenience does not necessarily imply that they are necessarily implemented in such order.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A cold storage air conditioning system, comprising:
the main circulation loop comprises a compressor, an outdoor heat exchanger and an indoor heat exchange device which are sequentially connected;
a cold storage device which can be connected in parallel or in series with the indoor heat exchange device;
the adjusting tank has a gas-liquid separation function, participates in refrigerant circulation when the cold accumulation device is connected with the indoor heat exchange device in series for cold accumulation, and is used for providing liquid refrigerant for the cold accumulation device.
2. The cold-storage air conditioning system according to claim 1, wherein the indoor heat exchange device includes an indoor heat exchanger and an indoor throttle valve provided at a refrigerating inlet side of the indoor heat exchanger, the indoor heat exchange device being installed on an indoor pipe located in the main circulation loop;
the cold accumulation device comprises a cold accumulator and a cold accumulation throttle valve arranged at the cold accumulation inlet side of the cold accumulator, and is arranged on a cold accumulation pipeline connected with the indoor pipeline in parallel;
the adjusting tank is arranged on an adjusting pipeline connected in series between the refrigerating outlet side of the indoor heat exchanger and the cold accumulation throttle valve;
wherein, the inlet and outlet branch of each pipeline is provided with a control valve for adjusting the on-off state so as to switch the running mode of the cold accumulation air conditioning system.
3. The cold storage air conditioning system of claim 2, wherein the operating modes of the cold storage air conditioning system include at least one of a normal air conditioning mode, a single cold storage mode, a first simultaneous cooling and cold storage mode, and a second simultaneous cooling and cold storage mode;
when the cold accumulation air conditioning system is in the conventional air conditioning mode, an inlet and outlet branch of the cold accumulation pipeline and an inlet and outlet branch of the adjusting pipeline are both turned off, and only the indoor heat exchange device participates in refrigerant circulation of the main circulation loop;
and/or when the cold accumulation air conditioning system is in the independent cold accumulation mode, the inlet and outlet branches of the indoor pipeline and the inlet and outlet branches of the adjusting pipeline are both shut off, and only the cold accumulation device participates in the refrigeration cycle of the main circulation loop;
and/or when the cold accumulation air conditioning system is in the first refrigeration and cold accumulation mode, the inlet and outlet branches of the adjusting pipeline are turned off, and the cold accumulation device and the indoor heat exchange device are connected in parallel to participate in the refrigeration cycle of the main circulation loop;
and/or when the cold accumulation air conditioning system is in the second refrigeration and cold accumulation mode, the inlet and outlet branches of the adjusting pipeline are turned off, the indoor heat exchange device, the adjusting tank and the cold accumulation device are sequentially connected in series to participate in the refrigeration cycle of the main circulation loop, and the indoor heat exchange device is positioned at the upstream of the adjusting tank.
4. The cold-storage air conditioning system according to claim 3, wherein the main circulation circuit further comprises a four-way valve for switching a flow direction of a refrigerant, four ports of the four-way valve being connected to a discharge side of the compressor, a suction side of the compressor, a cooling inlet side of the outdoor heat exchanger, and a cooling outlet side of the indoor heat exchanger, respectively;
the conventional air conditioning mode includes an individual cooling mode and an individual heating mode; when the cold accumulation air conditioning system is in the independent refrigeration mode, the indoor heat exchange device participates in the refrigeration cycle of the main circulation loop; when the cold accumulation air conditioning system is in the independent heating mode, the indoor heat exchange device participates in the heating cycle of the main circulation loop.
5. The cold-storage air-conditioning system according to claim 2, wherein a cold-releasing pipeline with adjustable on-off state is further connected between the cold storage device and the indoor heat exchanger, the cold-releasing pipeline comprises a cold-releasing inlet branch and a cold-releasing outlet branch, one end of the cold-releasing inlet branch is connected to the cold-storage inlet side of the cold-storage throttle valve, the other end of the cold-releasing outlet branch is connected to the cold-storage outlet side of the cold-storage throttle valve, and the other end of the cold-releasing outlet branch is connected to the refrigerating inlet side of the indoor throttle valve.
6. The cold accumulation air conditioning system as claimed in claim 5, wherein the cold release inlet branch is installed with a control valve for adjusting on-off state, and the cold release outlet branch is installed with a check valve allowing only refrigerant to flow to a refrigerating inlet side of the indoor throttle valve.
7. The cold storage air conditioning system of claim 5, wherein the operational mode of the cold storage air conditioning system further comprises a cool release mode;
when the cold accumulation air conditioning system is in the cold release mode, an inlet and outlet branch of the adjusting pipeline is turned off, the cold accumulator and the indoor heat exchange device are connected in series to participate in the refrigeration cycle of the main circulation loop, and the cold accumulator is positioned at the upstream of the indoor heat exchange device.
8. The cold storage air conditioning system according to any of claims 1 to 7, wherein the compressor has a make-up port, the air outlet of the trim tank being connected to the make-up port by a first make-up air outlet branch.
9. The cold storage air conditioning system according to claim 8, wherein the main circulation loop further comprises a gas-liquid separator connected between a refrigeration outlet side of the indoor heat exchange device and a suction side of the compressor, the air outlet of the surge tank being connected to an inlet of the gas-liquid separator through a second air-make-up outlet branch, the second air-make-up outlet branch being fitted with an air-make-up throttle valve.
10. An air conditioner characterized in that the air conditioner employs the cold accumulation air conditioning system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321386383.1U CN219976620U (en) | 2023-06-02 | 2023-06-02 | Cold accumulation air conditioning system and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321386383.1U CN219976620U (en) | 2023-06-02 | 2023-06-02 | Cold accumulation air conditioning system and air conditioner |
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| Publication Number | Publication Date |
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| CN219976620U true CN219976620U (en) | 2023-11-07 |
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| CN202321386383.1U Active CN219976620U (en) | 2023-06-02 | 2023-06-02 | Cold accumulation air conditioning system and air conditioner |
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| Country | Link |
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| CN (1) | CN219976620U (en) |
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2023
- 2023-06-02 CN CN202321386383.1U patent/CN219976620U/en active Active
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