CN219828998U - Constant temperature and humidity air conditioning unit based on air source heat pump - Google Patents
Constant temperature and humidity air conditioning unit based on air source heat pump Download PDFInfo
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- CN219828998U CN219828998U CN202320338001.1U CN202320338001U CN219828998U CN 219828998 U CN219828998 U CN 219828998U CN 202320338001 U CN202320338001 U CN 202320338001U CN 219828998 U CN219828998 U CN 219828998U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 12
- 238000005338 heat storage Methods 0.000 claims abstract description 24
- 238000003303 reheating Methods 0.000 claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 238000004146 energy storage Methods 0.000 claims description 2
- 238000010257 thawing Methods 0.000 abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 238000007791 dehumidification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model relates to a constant temperature and humidity air conditioning unit based on an air source heat pump, which comprises a compressor, a four-way reversing valve, an electronic expansion valve, an indoor air heat exchanger, an indoor air reheating heat exchanger and a heat storage device, wherein an air inlet and an air outlet of the compressor are connected with the four-way reversing valve, one end of the four-way reversing valve is connected with one end of an outdoor air heat exchanger and one end of the indoor air reheating heat exchanger through a refrigerant pipe and an electromagnetic valve respectively, the other end of the four-way reversing valve is connected with one end of the indoor air heat exchanger and one end of the heat storage device through the refrigerant pipe and the electromagnetic valve respectively, and the other end of the outdoor air heat exchanger is connected with the other end of the indoor air heat exchanger and the other end of the heat storage device through the electronic expansion valve after being connected with the other end of the indoor air heat exchanger. The utility model can not only promote the defrosting speed, reduce the energy consumption of defrosting, but also lighten the fluctuation of indoor air temperature during defrosting; and the condensation heat can be recycled, so that the energy consumption for electrically reheating the indoor air is reduced.
Description
Technical Field
The utility model belongs to the field of building refrigeration air conditioners, and relates to a constant temperature and humidity air conditioning unit based on an air source heat pump.
Background
The air source heat pump technology is widely applied to the field of building refrigeration and air conditioning, can simultaneously give consideration to cooling and heating, and is an energy-saving and environment-friendly technology. However, the air source heat pump air conditioner can face the problem of frosting of the outdoor heat exchanger when heating in winter, especially in cold and humid areas, and the wide application of the air source heat pump is severely restricted.
The constant temperature and humidity air conditioner is a technological air conditioner, is generally applied to areas needing to strictly control indoor temperature and humidity for a long time such as a collection warehouse, a file warehouse and the like in civil buildings, and is also widely applied to the industrial fields of electronic manufacturing, medical treatment and health, biopharmaceuticals and the like. Because the temperature and the humidity of the indoor air need to be accurately controlled, the indoor air needs to be reheated after being subjected to primary cooling and dehumidification through the indoor air heat exchanger under the cold supply working condition, so that the aims of accurately controlling the relative humidity, reducing the air supply temperature difference and avoiding frequent start and stop of the compressor are fulfilled.
Under the heating condition in winter, defrosting is needed when the outdoor heat exchanger is severely frosted, and when the conventional constant temperature and humidity air conditioner is frosted, heat is needed to be absorbed from the room through the indoor air heat exchanger, so that the indoor air temperature and humidity cannot be normally maintained during the defrosting, and meanwhile, the electric heater can generate larger energy consumption. Under the cooling working condition in summer, in order to accurately control the indoor temperature and humidity, a conventional constant temperature and humidity air conditioner is generally provided with an electric heater behind an indoor heat exchanger to reheat the cooled and dehumidified air.
Disclosure of Invention
The utility model provides a constant temperature and humidity air conditioning unit based on an air source heat pump, which can avoid directly taking heat from indoor air when an outdoor air heat exchanger is frosted seriously and needs defrosting, reduce the fluctuation of indoor air temperature during defrosting, and reduce defrosting time and energy consumption.
The technical scheme provided by the utility model is as follows: the constant temperature and humidity air conditioning unit based on the air source heat pump comprises an indoor unit and an outdoor air heat exchanger, wherein the indoor unit comprises a compressor, a four-way reversing valve, an electronic expansion valve, an indoor air heat exchanger, an indoor air reheating heat exchanger and a heat storage device, an air inlet and an air outlet of the compressor are respectively connected with the four-way reversing valve, one end of the four-way reversing valve is respectively connected with one end of the outdoor air heat exchanger and one end of the indoor air reheating heat exchanger through a refrigerant pipe and an electromagnetic valve, the other end of the four-way reversing valve is respectively connected with one end of the indoor air heat exchanger and one end of the heat storage device through the refrigerant pipe and the electromagnetic valve, and the other end of the outdoor air heat exchanger is connected with the other end of the indoor air heat exchanger and the other end of the heat storage device through the electronic expansion valve after being connected with the other end of the indoor air reheating heat exchanger.
The indoor unit is provided with the electric heater and the electric humidifier, and the indoor reheating heat exchanger is arranged between the electric heater and the electric humidifier.
The heat storage device adopts a phase-change energy storage heat exchanger.
The utility model comprehensively utilizes the heat storage device and the indoor air reheating heat exchanger on the basis of a conventional constant temperature and humidity air conditioning unit. When the outdoor air heat exchanger frosts seriously and needs defrosting, heat in the heat storage device can be utilized preferentially through reverse circulation, so that heat is prevented from being directly taken from indoor air, fluctuation of indoor air temperature during defrosting is reduced, defrosting time and energy consumption are reduced, and indoor temperature and humidity are controlled accurately. Under the cooling working condition, when the summer air needs reheating after dehumidification, the electromagnetic valve of the indoor air reheating heat exchanger can be controlled to recycle condensation heat, and the electromagnetic valve is used for reheating supercooled air after cooling and dehumidification so as to achieve a set air supply state point. Therefore, the energy consumption of electric reheating of indoor air after dehumidification can be greatly reduced while the indoor temperature and humidity are ensured to be accurately controlled.
Drawings
Fig. 1 is a schematic diagram of the indoor unit of the constant temperature and humidity air conditioner.
FIG. 2 is a schematic diagram of the heating operation of the present utility model.
FIG. 3 is a schematic diagram of the defrosting operation of the present utility model.
FIG. 4 is a schematic diagram of the cooling operation of the present utility model.
Description of the embodiments
Referring to fig. 1-4, the indoor unit comprises an indoor unit and an outdoor air heat exchanger 5, the indoor unit comprises a compressor 1, a four-way reversing valve 2, an electronic expansion valve 3, an indoor air heat exchanger 4, an indoor air reheating heat exchanger 6 and a heat storage device 7, an air inlet and an air outlet of the compressor 1 are respectively connected with the four-way reversing valve 2, one end of the four-way reversing valve 2 is respectively connected with one end of the outdoor air heat exchanger 5 and one end of the indoor air reheating heat exchanger 6 through a refrigerant pipe and an electromagnetic valve, the other end of the four-way reversing valve 2 is respectively connected with one end of the indoor air heat exchanger 4 and one end of the heat storage device 7 through the refrigerant pipe and the electromagnetic valve, and the other end of the outdoor air heat exchanger 5 is connected with the other end of the indoor air reheating heat exchanger 6 through the electronic expansion valve 3 and the other end of the indoor air heat exchanger 4 and the other end of the heat storage device 7. The indoor unit is provided with an electric heater and an electric humidifier, and the indoor reheating heat exchanger is arranged between the electric heater and the electric humidifier.
As shown in fig. 1, a heat storage device 7 and an indoor air reheating heat exchanger 6 are additionally arranged on one side of an indoor unit; as shown in fig. 2 to 4, the heat storage device 7 is connected in parallel with the indoor unit heat exchanger 4, and the indoor air reheat heat exchanger 6 is connected in parallel with the outdoor air heat exchanger 5. The four-way reversing valve 2 is switched to change the flow passage of the refrigerant, so as to change the flow direction of the refrigerant, and the functions of the indoor unit and the outdoor unit of the air conditioning system in winter and summer are converted. The working principle under each working condition is as follows:
1) Winter heating condition
As shown in fig. 2, during normal heat supply, the solenoid valves 8, 9, 11 in front of the indoor air heat exchanger 4, the outdoor air heat exchanger 5, and the heat storage device 7 are opened, and the solenoid valve 10 in front of the indoor air reheat heat exchanger 6 is kept closed.
When the heat supply working condition is running, the outlet of the compressor 1 discharges high-temperature and high-pressure refrigerant gas according to the refrigerant flow direction 12 through the four-way reversing valve 2, the high-temperature and high-pressure refrigerant gas enters the indoor air heat exchanger 4 and the heat storage device 7 to be condensed and released, the heat is throttled by the electronic expansion valve 3, and the heat is evaporated and absorbed in the outdoor air heat exchanger 5 and then enters the compressor 1, so that the heat supply cycle is formed.
The indoor air is heated and humidified by the indoor air inlet, the indoor air heat exchanger 4 and the electric humidifier 15, and then is sent into the room by the fan 13 through the indoor air outlet. When the indoor air heat exchanger 4 is insufficient in heat supply, the electric heater 14 is started to supplement heating.
2) Defrosting working condition in winter
As shown in fig. 3, after the outdoor air heat exchanger is operated for a period of time under the heating condition, if frosting occurs, the heat exchange efficiency is reduced, the refrigerant system automatically starts the reverse circulation to start defrosting according to the refrigerant flow direction 12, at this time, the indoor air heat exchanger 4 stops working, the electric heater 14 starts to operate, the electromagnetic valves 9 and 11 in front of the outdoor air heat exchanger 5 and the heat storage device 7 are opened, and the electromagnetic valves 8 and 10 in front of the indoor air heat exchanger 4 and the indoor air reheat heat exchanger 6 are kept closed.
When the system is in defrosting operation, the compressor 1 is opened for reverse circulation through the four-way reversing valve 2, high-temperature and high-pressure refrigerant gas is discharged from the outlet of the compressor 1, enters the outdoor air heat exchanger 5 for condensation and heat release, is throttled by the electronic expansion valve 3, and enters the compressor 1 after evaporation and heat absorption in the heat storage device 7 to form defrosting circulation.
3) Working condition of cooling in summer
As shown in fig. 4, when the cooling operation is performed, the heat storage device 7 is stopped, the electromagnetic valve 9, the electromagnetic valve 8, and the electromagnetic valve 10 in front of the outdoor air heat exchanger 5, the indoor air heat exchanger 4, and the indoor air reheat heat exchanger 6 are opened, and the electromagnetic valve 11 in front of the heat storage device 7 is kept closed.
The outlet of the compressor 1 discharges high-temperature and high-pressure refrigerant gas according to the refrigerant flow direction 12, the high-temperature and high-pressure refrigerant gas respectively enters the outdoor air heat exchanger 5 and the indoor air reheating heat exchanger 6 to be condensed and released, the high-temperature and high-pressure refrigerant gas is throttled by the electronic expansion valve 3, and the high-temperature and high-pressure refrigerant gas enters the compressor 1 after being evaporated and absorbed in the indoor air heat exchanger 4 to form a cooling circulation.
The indoor air enters the indoor air heat exchanger 4 through the indoor air inlet to cool and dehumidify, and then is heated to an air supply state point by the indoor air reheating heat exchanger 6, and is sent into the room through the indoor air outlet by the fan 13, and the electric heater 14 can finely adjust the air supply temperature.
Claims (3)
1. The utility model provides a constant temperature and humidity air conditioning unit based on air source heat pump, includes indoor set and outdoor air heat exchanger, its characterized in that: the indoor unit comprises a compressor, a four-way reversing valve, an electronic expansion valve, an indoor air heat exchanger, an indoor air reheating heat exchanger and a heat storage device, wherein an air inlet and an air outlet of the compressor are connected with the four-way reversing valve, one end of the four-way reversing valve is connected with one end of the outdoor air heat exchanger and one end of the indoor air reheating heat exchanger through a refrigerant pipe and an electromagnetic valve respectively, the other end of the four-way reversing valve is connected with one end of the indoor air heat exchanger and one end of the heat storage device through the refrigerant pipe and the electromagnetic valve respectively, and the other end of the outdoor air heat exchanger is connected with the other end of the indoor air reheating heat exchanger through the electronic expansion valve and the other end of the heat storage device after being connected.
2. The air source heat pump-based constant temperature and humidity air conditioning unit according to claim 1, wherein: the indoor unit is provided with an electric heater and an electric humidifier, and the indoor reheating heat exchanger is arranged between the electric heater and the electric humidifier.
3. The air source heat pump-based constant temperature and humidity air conditioning unit according to claim 1 or 2, wherein: the heat storage device is a phase-change energy storage heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320338001.1U CN219828998U (en) | 2023-02-28 | 2023-02-28 | Constant temperature and humidity air conditioning unit based on air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320338001.1U CN219828998U (en) | 2023-02-28 | 2023-02-28 | Constant temperature and humidity air conditioning unit based on air source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219828998U true CN219828998U (en) | 2023-10-13 |
Family
ID=88279291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320338001.1U Active CN219828998U (en) | 2023-02-28 | 2023-02-28 | Constant temperature and humidity air conditioning unit based on air source heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219828998U (en) |
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2023
- 2023-02-28 CN CN202320338001.1U patent/CN219828998U/en active Active
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