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A frost-free refrigerant double-cycle fresh air air conditioning unit

A fresh air conditioner and refrigerant technology, applied in refrigerators, refrigeration components, compressors with reversible cycles, etc., can solve problems such as insufficient cooling capacity and insufficient heating supply, and achieve the effects of improving energy efficiency and flexible operation strategies

Active Publication Date: 2019-12-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat pump type exhaust air heat recovery fresh air air conditioner unit has many advantages such as high heat recovery efficiency, wide range of adaptability to temperature differences, health and sanitation, etc., but because it only uses exhaust air as the only cold / heat source, there is insufficient cooling capacity in summer, and low temperature conditions in winter Insufficient Heating Bottleneck

Method used

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  • A frost-free refrigerant double-cycle fresh air air conditioning unit
  • A frost-free refrigerant double-cycle fresh air air conditioning unit
  • A frost-free refrigerant double-cycle fresh air air conditioning unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A frost-free refrigerant double-cycle fresh air air conditioning unit, such as figure 1 As shown, it includes an air source heat pump circulation unit, a heat recovery heat pump circulation unit, an air supply air duct 21 and an exhaust air duct 24 .

[0036] Among them, the air source heat pump cycle unit includes air source heat pump cycle compressor 1, air source heat pump cycle four-way reversing valve 3, outdoor heat exchanger 5, outdoor fan 6, air source heat pump cycle throttling device 7 and the first air supply Coil 8. The heat recovery heat pump cycle unit includes a heat recovery cycle compressor 2 , a heat recovery cycle four-way reversing valve 4 , a heat recovery coil 9 , a heat recovery cycle throttling device 10 and a second air supply coil 11 .

[0037]Wherein, the heat recovery coil 9 has an air channel and a refrigerant channel, and the air channel of the heat recovery coil 9 communicates with the exhaust air channel 24 . The refrigerant channel of ...

Embodiment 2

[0054] A frost-free refrigerant double-cycle fresh air air conditioning unit (including air supply, dehumidification and reheating function), such as figure 2 As shown, the main structure is compared with the embodiment 1, and the reheating coil 14, the reheating regulating valve 15 and the necessary refrigerant connecting pipes are added to the heat recovery heat pump circulation unit.

[0055] The connection method is: the first interface of the heat recovery cycle four-way reversing valve 4 communicates with the exhaust port of the heat recovery cycle compressor 2 through the refrigerant connecting pipe 48, and the second interface of the heat recovery cycle four-way reversing valve 4 , refrigerant connecting pipe 47, refrigerant connecting pipe 46, refrigerant channel of heat recovery coil 9, refrigerant connecting pipe 45, refrigerant connecting pipe 44, heat recovery cycle throttling device 10, refrigerant connecting pipe 43, the second The refrigerant channel of the se...

Embodiment 3

[0060] A frost-free refrigerant double-cycle fresh air air conditioning unit, such as image 3 shown. Compared with Embodiment 1, only the relative positions of the first air supply coil 8 and the second air supply coil 11 in the air supply duct 21 are changed, so that fresh air first passes through the second air supply coil 11 and then passes through The first air supply coil 8. Therefore, in this embodiment, the air supply duct 21 is sequentially connected to the fresh air outlet 22 , the air channel of the second air supply coil 11 , the air channel of the first air supply coil 8 , the air supply fan 12 and the air supply port 23 .

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Abstract

The invention relates to a frost-free refrigerant double-cycle fresh air air conditioner unit, an air source heat pump cycle compressor, an air source heat pump cycle four-way reversing valve, a refrigerant channel of an outdoor heat exchanger, an air source heat pump cycle throttling device, The refrigerant channel of the first air supply coil forms the refrigerant circulation loop of the air source heat pump circulation unit; the heat recovery cycle compressor, the heat recovery cycle four-way reversing valve, the refrigerant channel of the heat recovery coil, and the heat recovery cycle section The air flow device and the refrigerant channel of the second air supply coil form the refrigerant circulation loop of the heat recovery heat pump cycle unit; the air channel of the first air supply coil and the air channel of the second air supply coil are connected to the air supply channel , the air channel of the heat recovery coil is connected to the exhaust air channel. The invention enables the unit to have two different evaporation temperatures through two refrigerant cycles, and can absorb heat from indoor exhaust air and ambient air respectively, and solves the problem of frosting of conventional heat recovery heat exchangers.

Description

technical field [0001] The invention relates to a vapor compression heat pump type fresh air air conditioner unit, in particular to a frost-free refrigerant double cycle fresh air air conditioner unit. Background technique [0002] In recent years, under the background of smog, indoor air quality has been paid more and more attention. The fresh air air conditioning unit is an important part of the room air conditioning system. On the one hand, it can send filtered fresh outdoor air into the room to replace the dirty air; . [0003] At present, the most common fresh air treatment equipment on the market is the air source heat pump type fresh air air conditioner unit, but in cold regions, there is still a technical problem of frosting on the outdoor heat exchanger for unit heating. Frosting occurs when the temperature of the outer surface of the outdoor heat exchanger is lower than 0°C and lower than the air dew point temperature. Studies have shown that frost on the outdoo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B13/00F25B41/06F25B31/00F25B41/31F25B41/34F25B41/37
CPCF25B13/00F25B31/00F25B41/30F25B41/31Y02B30/52
Inventor 曹祥张春路
Owner TONGJI UNIV
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