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Heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas

A fresh air conditioner and heat recovery technology, applied in the direction of heating and cooling combination, refrigerator, refrigeration components, etc., can solve the problem of frosting of exhaust air heat exchanger, exhaust air heat exchanger (the evaporator is prone to frost, affecting the unit) Heating capacity and normal operation and other issues, to achieve high cooling and heating efficiency, remarkable energy-saving effect, remarkable effect of heating performance

Inactive Publication Date: 2016-09-21
NANTONG HUAXIN CENT AIR CONDITIONER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the traditional heat pump heat recovery device is used in severe winter regions, the exhaust air heat exchanger (evaporator) is prone to frost, which affects the heating capacity and normal operation of the unit.
Numerical simulation shows that if the supply air temperature is set at 20°C, when the outdoor environment is lower than -10°C, frosting of the exhaust air heat exchanger will be inevitable

Method used

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  • Heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas
  • Heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A heat pump type exhaust air heat recovery fresh air air conditioning unit suitable for severe cold regions has two working conditions of cooling and heating, and its specific working process is as follows.

[0023] Under cooling conditions, the air supply heat exchanger 1 acts as an evaporator, the exhaust air heat exchanger 2 acts as a condenser, the four-way reversing valve 4 connects the refrigerant connecting pipe 9, the first three-way reversing valve 11 and the second The three-way reversing valve 12 communicates with the air passage 20, and the defrosting electric heater 17 does not start. Refrigerant cycle: compressor 3®refrigerant connecting pipe 9®four-way reversing valve 4®refrigerant connecting pipe 9—exhaust air heat exchanger 2—refrigerant connecting pipe 9—throttling device 5—refrigeration Agent connecting pipe 9—air supply heat exchanger 1—refrigerant connecting pipe 9—four-way reversing valve 4—refrigerant connecting pipe 9—compressor 3. After the fre...

Embodiment 2

[0026] A heat pump type exhaust air heat recovery fresh air air conditioning unit with reheat function suitable for severe cold areas, the structure and process are as follows figure 2 shown. On the basis of Example 1, a reheat coil 6, a reheat solenoid valve 7, and a reheat flow regulating valve 8 are added, and necessary refrigerant connecting pipes are added, and a dehumidification and reheating working condition is added functionally. The dehumidification working condition is based on the cooling working condition, and the reheat solenoid valve 7 and the reheat flow regulating valve 8 are opened. After the fresh air is cooled and dehumidified in the air supply heat exchanger 1, the dry bulb temperature is raised through the reheating coil 6 to ensure the comfort of the air supply. The dehumidification condition is suitable for spring and autumn, when the temperature is suitable but the humidity is high.

[0027]Compared with Embodiment 1, Embodiment 2 adds a second fres...

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Abstract

The invention discloses a heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas. The heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas comprises a supply air heat exchanger, an exhaust air heat exchanger, a compressor, a four-way reversing valve, a throttling gear, a refrigerant connection pipe, a fresh air port, a first three-way reversing valve, a second three-way reversing valve, an air supply fan, an air supply outlet, an air return inlet, an air exhaust fan, a defrosting electric heater, an air-air plate heat exchanger, an exhaust outlet and an air flue. A traditional heat pump type exhaust air heat recovery fresh air conditioning unit is improved, outdoor low-temperature air is deeply preheated through outlet air (larger than 0 DEG C) of the exhaust air heat exchanger, the air inlet temperature of the supply air heat exchanger is increased to be more than minus 10 DEG C, the load of a heat pump system is reduced, the exhaust air heat exchanger is prevented from frosting, and the application range of the heat pump type exhaust air heat recovery fresh air conditioning unit can be enlarged greatly to the minus 30 DEG C outdoor environment temperature.

Description

technical field [0001] The invention relates to an air-conditioning unit suitable for severe cold regions at -30°C, in particular to a heat pump type exhaust heat recovery fresh air air-conditioning unit suitable for severe cold regions. Background technique [0002] With the continuous improvement of people's requirements for indoor air quality, the use of fresh air air conditioning units is becoming more and more extensive. The fresh air air conditioner unit is an effective air purification equipment. On the one hand, the indoor dirty air is discharged outside, and on the other hand, the fresh outdoor air is filtered and heat-humidified, and then input into the room. However, if the exhaust air heat recovery technology is not used, the heat and humidity treatment of fresh air will consume a lot of energy. [0003] The heat pump exhaust air heat recovery fresh air air conditioning unit that has emerged in recent years is a new type of active exhaust heat recovery technolog...

Claims

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Application Information

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IPC IPC(8): F25B29/00F25B47/02
CPCF25B29/003F25B47/022F25B29/00Y02P80/15
Inventor 俞越张春路曹祥
Owner NANTONG HUAXIN CENT AIR CONDITIONER
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