Cold accumulation type hot air defrosting refrigerating system and heat accumulation type hot air defrosting heat pump system

Abstract

The invention discloses a cold accumulation type hot air defrosting refrigerating system and a heat accumulation type hot air defrosting heat pump system. The refrigerating system comprises a refrigerating loop. The refrigerating loop is at least formed by sequential communicating of a compressor, a condenser, a throttling device and an evaporator in series. A defrosting loop for defrosting of the evaporator and a cold accumulation evaporator are further arranged. The defrosting loop is at least formed by sequential communicating of the compressor, the evaporator, the throttling device and the cold accumulation evaporator in series. The refrigerating system can achieve stable, rapid and thorough defrosting, meanwhile, the cooling capacity obtained during defrosting can be recycled, the total running efficiency of the system is improved accordingly, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of refrigeration or heat pumps, in particular to a cold storage type hot gas defrosting refrigeration system and a heat storage type hot gas defrosting heat pump system. Background technique [0002] In order to ensure the normal operation of the direct evaporative air cooler, when the surface is frosted, it must be defrosted in time. The defrosting methods mainly include water flushing, electric defrosting and hot gas defrosting, among which hot gas defrosting is the most commonly used. Hot gas defrosting can be divided into reverse defrosting and hot gas bypass defrosting according to different defrosting methods of refrigeration or heat pump systems. Taking the household air conditioner as an example, reverse defrosting means that the heat pump system controls the reversing of the four-way reversing valve under the heating condition, so that the system can operate under the cooling condition to remove the frost on...

AI Technical Summary

Problems solved by technology

[0003] Among the defrosting methods of heat pumps, hot gas defrosting is easy to implement and more energy-saving, and has been widely used. In particular, reverse defrosting is more energy-saving than hot gas bypass defrosting. However, reverse defrosting is used in household air conditioners. When the low pressure is too low, the defrosting time will be long and the effect will be poor. When it is applied to the heat pump water heater, the temperature of the hot water produced will decrease and the system efficiency will decrease during defrosting.

[0004] Among the defrosting methods of the refrigeration system, the reverse defrosting is also relatively energy-saving, but the cooling capacity produced by the reverse defrosting is often wasted

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