A phase change heat storage, refrigerant subcooling heat exchange device and an air conditioning system using the same

Abstract

The invention discloses a phase change heat storage, refrigerant subcooling heat exchange device and an air conditioning system using the same, wherein the heat exchange device includes a shell, a first coil and a second coil arranged in the shell, and a filling Phase change heat storage medium inside the shell. The air conditioning system includes an outdoor unit and an indoor unit, the indoor unit includes at least one indoor unit, the outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor throttling device and a four-way valve, and the indoor unit includes an indoor heat exchanger device and indoor throttling device, wherein, the two ends of the first coil communicate with the outdoor throttling device and the indoor throttling device respectively; one end of the second coil communicates with the outdoor throttling device, and the other end communicates with the The intake port of the compressor is connected. It realizes the secondary subcooling of the refrigerant in the refrigeration process by using one device at the same time, and realizes parallel heat storage and series waste heat recovery in the heating process; and the heat in the heat accumulator is used in the defrosting process without causing indoor decrease in temperature.

Description

technical field [0001] The invention relates to the technical field of air-conditioning refrigerant supercooling and defrosting, in particular to a phase-change heat storage and refrigerant supercooling heat exchange device and an air-conditioning system using the same. Background technique [0002] When the air conditioner is cooling, when the outdoor temperature is too high, the refrigerant coming out of the outdoor heat exchanger is insufficient in subcooling, and the refrigerant in the liquid pipe will flash, resulting in poor cooling effect; when the air conditioner is heating, when When the outdoor temperature is too low, frosting occurs on the outdoor heat exchanger. The traditional air conditioner defrosting operation uses a four-way valve to switch to a refrigeration refrigerant circuit. It will absorb the heat in the room, causing large fluctuations in the room temperature and reducing the comfort of use. [0003] In order to solve the problem of refrigerant flash...

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Problems solved by technology

[0004] In order to solve the problem of indoor temperature drop caused by defrosting, a heat accumulator is designed on the air conditioning system. The heat accumulator can store heat through auxiliary electric heating or high-temperature refrigerant on the side of the compressor when the indoor mechanism is heating. When defrosting, heat is taken from the accumulator for defrosting

[0005] In the existing technology, there are few air-conditioning systems with two functions at the same time. Even if the air-conditioning system needs to have the secondary sub-cooling function and the defrosting function at the same time, it is necessary to add a sub-cooling device and a defrosting function to the existing air-conditioning system. Heat accumulator, this will make the structure of the air conditioning system more complicated, the volume will become larger, and it will lead to an increase in production costs

Moreover, the existing air conditioning system will absorb the heat in the room during defrosting. The best solution is to require the air conditioner to have the function of secondary subcooling of the refrigerant. Heat storage and defrosting do not need to absorb heat in the room, but the existing air conditioning system , not only the system design and control are complex and costly, but also the problem of heat absorption in the room during defrosting, which reduces user satisfaction

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