Heat pump air conditioning system suitable for full-year working conditions and operating method thereof

Abstract

The invention discloses a heat pump air conditioning system suitable for full-year working conditions and an operating method thereof. The system comprises a compressor, dehumidification heat exchangers, a compensation heat exchanger, a high-pressure liquid storage tank, a thermal expansion valve, a four-way reversing valve, a three-way valve, a three-way air valve and a fan; the system is provided with two dehumidification heat exchangers for serving as an evaporator and a condenser in a refrigerating system; and the system is provided with the compensation heat exchanger after the dehumidification heat exchangers for performing the heating or cooling compensation on air to achieve precise control of an air supply temperature. The system can realize the functions of cooling dehumidification, cooling humidification, heating dehumidification and heating humidification through switching of various valve states, and is suitable for the full-year working conditions. The system has such advantages as high adaptability, energy conservation, environmental protection and compact parts.

Description

technical field [0001] The invention relates to the field of refrigeration and air conditioning, in particular to a heat pump air conditioning system suitable for year-round working conditions and an operating method thereof. Background technique [0002] The traditional heat pump air-conditioning system uses the method of simultaneous processing of air latent heat and sensible heat. In summer, it is necessary to reduce the temperature of the processed air to the dew point and then perform reheat compensation, resulting in high energy consumption of the energy-consuming system and surface coolers or evaporators. Mold is easy to grow on the surface; in winter conditions, it is impossible to humidify the room, resulting in poor thermal comfort. At the same time, traditional heat pump air conditioners are not suitable for high temperature and low humidity and low temperature and high humidity conditions in transitional seasons. [0003] Through the retrieval of the existing pu...

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Problems solved by technology

[0002] The traditional heat pump air-conditioning system uses the method of simultaneous processing of air latent heat and sensible heat. In summer, it is necessary to reduce the temperature of the processed air to the dew point and then perform reheat compensation, resulting in high energy consumption of the energy-consuming system and surface coolers or evaporators. Mold is easy to grow on the surface; in winter conditions, it is impossible to humidify the room, resulting in poor thermal comfort

At the same time, traditional heat pump air conditioners are not suitable for high temperature and low humidity and low temperature and high humidity conditions in transitional seasons

[0003] Through the retrieval of the existing published technologies, it is found that the current heat pump air-conditioning system cannot be applied to the year-round working conditions and realize the independent treatment of sensible heat and latent heat at the same time

For example, the Chinese patent application number 20160428215.2 "Dehumidification air-conditioning system and air-conditioning control method" is equipped with two indoor heat exchangers and corresponding bypass circuits, so that the system can be applied to low-temperature and high-humidity environments, but it is still not applicable to year-round working conditions and there is no Independent treatment of sensible heat and latent heat

For example, the Chinese patent application number 200810200429.X "Ground source heat pump air conditioning system based on independent control of temperature and humidity" handles the latent heat load through the dehumidification wheel, and uses the cooling coil to handle the sensible heat load, but it is only suitable for high temperature and high humidity conditions

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