An independent fresh air unit with air energy heat pump heat recovery and humidification function

Abstract

The invention discloses an independent fresh air unit of an air energy heat pump with heat recovering and humidifying function, and relates to a heat recovering fresh air treatment device. The fresh air unit comprises a fresh air channel, an air exhausting channel, a bypass ventilation channel, an outdoor air channel, a compressor and a heat exchanger, wherein wherein the fresh air channel is arranged in a box body and used for indoor air supply, the air exhausting channel is used for indoor air return, the bypass ventilation channel is used for indoor air supply in a transition season, namelysummer, and the outdoor air channel is used for supplying a cold and heat source to the outside air of the room; a fresh air fan, a filter, a first heat exchanger, a second heat exchanger and a wet film humidifier are arranged in the fresh air channel along the direction of indoor fresh air supplying; the second heat exchanger and the wet film humidifier are arranged at an air inlet of the indoorfresh air; the compressor is connected to the second heat exchanger, the first heat exchanger and a third heat exchanger through a four-way reversing valve in a series mode; and the heat exchangers are further connected to a water supplementing pipeline, and a humidifying water circulating pipeline is connected between the heat exchangers and the air pipe wet film humidifier. According to the independent fresh air unit of the air energy heat pump with the heat recovering and humidifying function, the fresh air unit can be used for cold regions, the heat recovering efficiency is high, and theindoor comfort level can be effectively improved.

Description

technical field [0001] The invention relates to a heat recovery fresh air treatment device, in particular to an independent fresh air unit with an air energy heat pump heat recovery and humidification function used in severe cold regions. It belongs to the technical field of air energy heat pumps. Background technique [0002] my country's buildings should meet the requirements of energy saving, and passive ultra-low energy consumption buildings have emerged. In particular, the airtightness of various public buildings has been greatly improved. In order to prevent the emergence of sick buildings, the introduction of outdoor fresh air needs to be solved urgently. In terms of regions, the existing technology also has the following limitations: [0003] 1. In severe cold and cold areas, the winter climate is special, the outdoor temperature is low, the cold air temperature can reach as low as -30°C or even lower, and the outdoor wind speed can reach up to 9m / s. Simple and unorg...

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Problems solved by technology

[0003] 1. In severe cold and cold areas, the winter climate is special, the outdoor temperature is low, the cold air temperature can reach as low as -30°C or even lower, and the outdoor wind speed can reach up to 9m / s. Simple and unorganized introduction of outdoor fresh air from the window will cause indoor comfort. This will lead to serious energy waste and seriously violate the energy-saving requirements

[0004] 2. In recent years, the proportion of days with good outdoor air has dropped sharply. If the building introduces outdoor fresh air in an unorganized manner, the fresh air will be introduced directly without treatment, which will instead introduce new pollution sources and aggravate indoor air pollution. Air Quality Requirements

[0005] 3. The existing independent fresh air system generally uses electric heating in winter, which has high energy consumption, extremely unreasonable energy consumption, and high operating costs. The unit can only operate in winter, and has no humidification function, and no cooling function in summer

[0006] 4. Existing fresh air fans generally do not have a humidification function, and the air humidity in severe cold regions is extremely low in winter, which seriously affects the indoor comfort under the same temperature conditions

[0007] 5. Fresh air units used together with centralized or semi-centralized air conditioners are usually not equipped with heat recovery devices, and due to the addition of fresh air, the heating and cooling systems of air conditioning units become complicated, which not only increases building energy consumption, but also complicates the system, which is not worth the candle

[0008] 6. Going further, a small number of fresh air fans are equipped with heat recovery devices, but whether they use heat exchangers or full heat recovery wheels, the heat recovery efficiency is very low, and the exhaust heat cannot be recovered to a greater extent, and the heat exchangers have exchange The contradiction between the material of the thermal core and the heat exchange efficiency, and the problem of complex structure in the total heat recovery

[0009] 7. For severe cold and cold areas, if the heat recovery device of the ordinary heat recovery fresh air unit adopts a metal heat exchanger to achieve higher heat exchange efficiency, due to the low temperature of the outdoor fresh air, frosting of the heat exchanger will inevitably occur; in order to avoid If a paper core heat exchanger is used for frosting, the heat exchange efficiency will be greatly reduced, and the heat recovery value will not be high

[0010] To sum up, buildings in severe cold and cold regions urgently need to introduce fresh, healthy fresh air that meets the indoor comfort requirements of indoor air quality, but none of the fresh air systems or fresh air treatment equipment currently on the market can meet the special requirements of severe cold and cold regions

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