Dual-circuit air-conditioning system

Abstract

The invention discloses a dual-circuit air-conditioning system which comprises a compression refrigeration circuit and a heat exchange circuit. The compression refrigeration circuit and the heat exchange circuit share an outdoor heat exchanger, an outdoor fan, an indoor heat exchanger and an indoor fan; both the outdoor heat exchanger and the indoor heat exchanger exchange heat through three fluids and respectively comprise a refrigerant pipeline, a water or anti-freezing solution pipeline and a fin; the compression refrigeration circuit is a closed loop which consists of a compressor, the refrigerant pipeline of the indoor heat exchanger, an expansion device and the refrigerant pipeline of the outdoor heat exchanger; and the heat exchange circuit is the closed loop which consists of a pump, the water or anti-freezing solution pipeline of the outdoor heat exchanger and the water or anti-freezing solution pipeline of the indoor heat exchanger. The dual-circuit air-conditioning system disclosed by the invention has high energy efficiency ratio and an energy storage function, can realize free cooling, can utilize energies at two sides of a hot pump system simultaneously, can give consideration to various cold and heat resources and can perform effective coupling with solar energy, waste heat and the like, and has the advantages of good heating effect, energy conservation, high efficiency, flexibility, convenience, low cost and good economical efficiency.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a dual-circuit air conditioning system. Background technique [0002] Conventional air conditioning systems use air or liquid (water or refrigerated liquid) as the cold and heat source. Water or refrigerated liquid generally comes from cooling towers, or is cooled or heated by sea / river water or ground sources. However, it is generally impossible to take into account that both air and liquid are cold and heat sources at the same time, that is, only one cold and heat source, either air or liquid, is used. [0003] Conventional air-conditioning systems use water or refrigerant to heat indoor air, but generally only use one type of refrigerant, namely water or refrigerant, to process indoor air, and cannot take into account both methods at the same time. [0004] Conventional compression-based refrigeration and air-conditioning systems generally cannot utilize the energy on b...

AI Technical Summary

Problems solved by technology

However, it is generally not possible to take into account that both air and liquid are cold and heat sources at the same time, that is, only one kind of cold and heat source is used, either air or liquid

[0003] Conventional air conditioning systems use water or refrigerant to heat indoor air, but generally only use one type of refrigerant, that is, water or refrigerant to treat indoor air, and cannot take into account both methods at the same time

[0004] Conventional compression-based refrigeration and air-conditioning systems generally cannot use the energy on both sides of the compression refrigeration cycle at the same time, that is, use its heat and cooling capacity at the same time

[0005] Conventional air conditioning systems based on compression refrigeration, especially air source systems, generally cannot be well coupled with other cold and heat sources, such as solar energy

[0006] Conventional air-conditioning systems based on compression refrigeration generally cannot effectively achieve free cooling, such as direct use of outdoor cold air without compressor startup to achieve indoor cooling

[0007] Conventional air-conditioning systems based on compression refrigeration generally cannot achieve energy storage through efficient and simple storage of cooling and heat

[0008] Conventional air source heat pump system, when the outdoor temperature is low, the heating process is often interrupted by the defrosting process due to the problem of frosting, resulting in poor heating effect

[0009] The conventional air source refrigeration system uses air as the cold source, which has a high condensation temperature and high energy consumption. However, the evaporative cooling condenser is inconvenient to use because it cannot be compatible with the existing air source condenser.

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