Conditioner and heating control method thereof

Abstract

The invention provides an air conditioner and a heating control method thereof. Besides a refrigerant main loop of a compressor, a reversing valve, an indoor heat exchanger, a throttling device and anoutdoor heat exchanger connected in series, a bypass defrosting loop is additionally added, one end of the bypass defrosting loop is connected to the position between the compressor and the reversingvalve, and the other end of the bypass defrosting loop is connected to the position between the throttling device and the outdoor heat exchanger; and a controller is additionally arranged, so that when the air conditioner is in a heating mode and defrosting operation is started, the bypass valve is opened, part of refrigerant discharged by the compressor is directly discharged to the outdoor heatexchanger through the bypass defrosting loop, and the proportion of the refrigerant passing through the bypass defrosting loop to the refrigerant discharged by the compressor is adjusted according tothe temperature of a coil pipe of the outdoor heat exchanger. According to the air conditioner and the heating control method thereof, defrosting can be carried out during continuous heating operation without switching to a refrigeration mode, and therefore heat is not absorbed from a room; and the refrigerant flow of the refrigerant main loop and the bypass defrosting loop is controlled, so thatoutdoor defrosting can be guaranteed, and the indoor heating effect can be ensured.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioner and a heating control method thereof. Background technique [0002] With the development of the economy and the continuous improvement of living standards, users have higher and higher requirements for the heating capacity and heating comfort of air conditioners. However, in a low temperature environment, due to the drop of the ambient temperature, the evaporation pressure of the air conditioner also decreases, and the evaporation temperature decreases simultaneously, so that the compressor suction specific volume increases, the refrigerant flow rate decreases, and the effective volume of the compressor cannot be fully utilized. As a result, the heating capacity is greatly attenuated, and the heating energy efficiency ratio is also reduced. [0003] Moreover, when the outdoor ambient temperature and humidity reach a certain level, frost will form on t...

AI Technical Summary

Problems solved by technology

However, in a low temperature environment, due to the drop of the ambient temperature, the evaporation pressure of the air conditioner also decreases, and the evaporation temperature decreases simultaneously, so that the compressor suction specific volume increases, the refrigerant flow rate decreases, and the effective volume of the compressor cannot be fully utilized. As a result, the heating capacity is greatly attenuated, and the heating energy efficiency ratio is also reduced.

[0003] Moreover, when the outdoor ambient temperature and humidity reach a certain level, frost will form on the surface of the outdoor heat exchanger, further reducing the heating capacity. Currently, the air conditioner will enter cooling operation when defrosting, and the indoor heat exchanger will absorb heating capacity from the room, rapidly reducing the heating capacity. Room temperature affects user heating experience

Images