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Continuous heating phase change energy storage cascade air source heat pump system and operation method

An air source heat pump and phase change energy storage technology, applied in lighting and heating equipment, damage protection, fluid circulation arrangements, etc., can solve the problems of no heating, poor indoor comfort, long defrosting time, etc., to improve thermal comfort temperature, increase the defrosting speed, and ensure the effect of room temperature

Inactive Publication Date: 2017-01-25
UNIV OF SHANGHAI FOR SCI & TECH
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  • Description
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Problems solved by technology

[0003] The present invention aims at the problems of no indoor heating, long defrosting time, and poor indoor comfort during the defrosting process of the existing cascaded air source heat pump system, and proposes a continuous heating phase change energy storage cascade air source heat pump System and operation method, cascade air source heat pump system capable of normal defrosting and continuous heating

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  • Continuous heating phase change energy storage cascade air source heat pump system and operation method

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Embodiment Construction

[0013] like figure 1 The schematic diagram of the continuous heating phase change energy storage cascade air source heat pump system is shown. The system includes a low-temperature compressor 1, a high-temperature compressor 2, a four-way reversing valve 3, an indoor unit 4, an outdoor unit 5, and a second Electronic expansion valve 6, first electronic expansion valve 7, second gas-liquid separator 8, first gas-liquid separator 9, evaporation condenser 10, phase change heat accumulator 11, solenoid valve F1, solenoid valve F2, solenoid valve F3, solenoid valve F4, solenoid valve F5, solenoid valve F6, solenoid valve F7, solenoid valve F8, solenoid valve F9, solenoid valve F10, solenoid valve F11, solenoid valve F12. The system includes two parts, a low-temperature stage cycle and a high-temperature stage cycle.

[0014] For the low-temperature stage: the output end of the low-temperature stage compressor 1 is connected to the first port of the four-way reversing valve 3, and ...

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Abstract

The invention relates to a continuous heating phase change energy storage cascade air source heat pump system and its operation method. The cascade air source heat pump technology is combined with the phase change energy storage technology, and the phase change heat storage is used as the defrosting and cooling system. The low-level heat source for indoor heating ensures the stability and reliability of the defrosting operation of the cascade air source heat pump. The variable heat accumulator provides enough heat during the defrosting process, which can increase the defrosting speed; since the heat pump stores heat during high-efficiency operation, when defrosting is required, the stored heat is used for defrosting and heating, realizing The time-space transfer of energy improves the overall operating efficiency of the unit.

Description

technical field [0001] The invention relates to a heat supply system, in particular to a continuous heat supply phase change energy storage cascade air source heat pump system and an operating method. Background technique [0002] When the air source heat pump unit is used in the low temperature environment in winter in the northern region, the heating capacity will drop sharply, the exhaust temperature will exceed the limit, and the compressor will stop for protection and other problems. The cascade air source heat pump can achieve the purpose of improving the low temperature adaptability of the air source heat pump and improving its low temperature heating performance. Like conventional air source heat pumps, when the surface temperature of the outdoor unit is lower than the air dew point and lower than the freezing point during the heating operation of the cascade air source heat pump, frosting will occur. Many cities in northern my country have low-temperature and high-...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/10F25B41/04F25B47/02F25B41/20
Inventor 曲明璐王坛王瑾
Owner UNIV OF SHANGHAI FOR SCI & TECH
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