Natural defrosting low-temperature evaporation system and control method thereof

Abstract

The invention provides a natural defrosting low-temperature evaporation system. The natural defrosting low-temperature evaporation system comprises a first evaporator, a second evaporator, a compressor, a condenser, an expansion valve, and a fan, wherein the compressor, the condenser and the expansion valve sequentially communicate with one another, refrigerant outlets of the first evaporator andthe second evaporator are connected in parallel to an inlet of the compressor, and refrigerant inlets of the first evaporator and the second evaporator are connected in parallel to an outlet of the expansion valve; solenoid valves are arranged at the refrigerant inlets of the first evaporator and the second evaporator separately, the fan can blow air to the first evaporator and the second evaporator, and air valves are arranged on the front sides of the first evaporator and the second evaporator separately. The natural defrosting low-temperature evaporation system performs rotation work and natural defrosting through the two evaporators, the heat exchange amount of the natural defrosting low-temperature evaporation system cannot be affected during defrosting, and the failure rate is low.

Description

technical field [0001] The invention relates to the technical field of low-temperature evaporation systems, in particular to a low-temperature evaporation system for natural defrosting and a control method thereof. Background technique [0002] At present, in low-temperature air conditioners and low-temperature heat pump systems, four-way valves are used to switch heat pumps or hot gas bypasses to defrost the evaporator, and four-way valves are prone to failure when switching defrosts frequently, and hot gas bypass defrosts will cause Seriously affect the cooling capacity or heating capacity of the unit. [0003] It can be seen that the prior art needs to be improved and enhanced. Contents of the invention [0004] In view of the deficiencies of the prior art above, the purpose of the present invention is to provide a natural defrosting low-temperature evaporation system and its control method, through two evaporators to perform alternate work and natural defrosting, whic...

AI Technical Summary

Problems solved by technology

[0002] At present, in low-temperature air conditioners and low-temperature heat pump systems, four-way valves are used to switch heat pumps or hot gas bypasses to defrost the evaporator, and four-way valves are prone to failure when switching defrosts frequently, and hot gas bypass defrosts will cause Seriously affect the cooling capacity or heating capacity of the unit

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