A heat pump type air-cooled air conditioner sub-area functional defrosting system

Abstract

The invention relates to an area-separated and functionalized defrosting system of a heat pump type air cooled air conditioner. The defrosting system comprises an indoor heat exchanger (3), a compressor (7), an outdoor heat exchanger, an electronic expansion valve (9), a stop valve (10) and an outdoor draught fan (5). Area-separated and functionalized establishment is carried out on the outdoor heat exchanger, and the whole outdoor heat exchanger is formed by two or more than two functionalized heat exchangers. An outdoor auxiliary heat exchanger plays roles in anti-frost, periodical defrosting, auxiliary heating and evaporation and the like in winter in the heating process, and an outdoor main heat exchanger plays a role in absorbing heat on the outdoor air side to carry out indoor heating. The air conditioner can achieve indoor continuous heating during a defrosting period. The area-separated and functionalized defrosting system can ensure normal running of the heat pump type air cooled air conditioner through adoption of an outdoor exchanger area-separated and functionalized auxiliary heating and evaporation mode even if the air conditioner is in a severe cold area with microthermal climate and can meet heating requirements of the air conditioners in a cold area in winter. Compared with a traditional defrosting method, the area-separated and functionalized defrosting system has the advantages of being remarkable in energy conservation, universality and self-adaptability.

Description

technical field [0001] The invention relates to an anti-defrosting system of an air conditioner in the field of energy utilization, in particular to a subregional functional defrosting system of a heat pump type air-cooled air conditioner. Background technique [0002] Using heat pump type air-cooled air conditioners to heat buildings is one of the most widely used heating technologies at present. The increase of the thermal resistance of the heater causes the heating performance of the air conditioner to drop sharply, and in severe cases, the air conditioner cannot operate normally. Therefore, when the frost layer of the outdoor heat exchanger reaches a certain thickness, defrosting operation must be carried out. At present, the most commonly used defrosting method for heat pump air-cooled air conditioners is to use a four-way reversing valve to temporarily switch the outdoor heat exchanger from the original evaporator working mode to the condenser working mode, and use the...

AI Technical Summary

Problems solved by technology

However, this method needs to add a dedicated compressor waste heat recovery fan and heat pipe components to the outdoor heat exchanger. On the one hand, the structure of the air conditioner is complicated, on the other hand, the manufacturing cost is increased, and during the periodical double-effect defrosting period in winter, there are still The problem of shutting off the heat supply to the room

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