Evaporator dedusting and defrosting system of air source heat pump

Abstract

The invention discloses an evaporator dedusting and defrosting system of an air source heat pump. The system comprises a bracket, an upper shaft, a lower shaft, two hollow lifting pipes, a lifting motor, a rotary motor and an air heater and is characterized in that the upper shaft and the lower shaft are fixed on the bracket; upper chain wheels are arranged at two ends of the upper shaft; lower chain wheels are fixed at two ends of the lower shaft; the upper chain wheels and the lower chain wheels carry out transmission through chains; the lifting pipes are fixed on the chains; bristles are fixed on the outer surfaces of the lifting pipes; vent holes are uniformly formed in the outer surfaces of the lifting pipes; air outlets of the air heater communicate with inner cavities of the lifting pipes via a breather pipe; and the lifting motor drives the lower shaft to rotate to drive a chain transmission system to drive the bristles to sweep the surfaces of a coil and fins in a reciprocating manner, and a draught fan is adopted for blowing dust to ensure that an evaporator has excellent heat exchanging efficiency during working. Hot gas sprayed out of the vent holes in the lifting pipes also can be utilized to defrost and deice the surfaces of the coil and the fins, so that the heat exchanging efficiency of the evaporator in frost weather is improved, and energy consumption of the air source heat pump is further reduced.

Description

technical field [0001] The present invention relates to an air source heat pump evaporator dust removal and frost removal system, more specifically, to an air source heat pump evaporator dust removal and frost removal system which utilizes bristles and cold air to remove dust and hot air to remove frost. Background technique [0002] The air source heat pump is composed of compressor, evaporator, condenser, liquid storage tank, expansion valve and other devices. The medium circulates in the system under the action of the compressor. The working principle is: the liquid medium absorbs the air in the evaporator The heat energy is converted into a gaseous state; then, the medium passes through the compressor to complete the pressure increase of the gaseous state, and enters the condenser to transfer its own high-temperature heat to the circulating water, and at the same time it is transformed into a liquid, and then enters the evaporator again through the expansion valve In ord...

AI Technical Summary

Problems solved by technology

The working efficiency of the air source heat pump is greatly affected by external environmental factors. Since the pipeline of the evaporator is exposed to the external environment, the surface of the coil and fins is easy to be covered with dust after long-term use, which makes the medium in the evaporator tube and the outside air The heat exchange efficiency is reduced, which increases the energy consumption of the air source heat pump

Moreover, in the cold winter, the surface of the coil and fins is prone to frost or ice. Due to the blocking effect of the frost on the air, the working efficiency of the air source heat pump is greatly reduced. The existing deicing principle is to use the heat in the water tank to The energy of water is used for defrosting, and the defrosting efficiency is relatively low

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