Air conditioner heating unit and heating control method thereof

Abstract

The invention relates to an air conditioner heating unit, in particular to an air conditioner heating unit and a heating control method thereof. According to the air conditioner heating unit and the heating control method of thereof, the air inlet side of an evaporator is provided with a lubricating oil heat exchange pipe to serve as a cooler for compressor lubricating oil, forced convection of air sucked by a draught fan of the evaporator is given to the air inlet side of the evaporator to be used for cooling the compressor lubricating oil, and the air inlet temperature of the evaporator is increased. According to the technical scheme, a lubricating oil heat exchange pipe set is arranged below the evaporator, a high-pressure gas defrosting valve is arranged between a condenser and the evaporator, electromagnetic valves or electric valves are adopted as a refrigerating system defrosting switching valve and a lubricating oil cooling switching valve, microcomputer automatic control can be achieved through the arrangement of a temperature sensor and a pressure sensor, defrosting and oil temperature control over the air cooled heat pump air conditioner unit can be more accurate, and the running efficiency of heating of the unit is better improved.

Description

technical field [0001] The invention relates to an air-conditioning and heating unit, in particular to an air-conditioning and heating unit and a heating control method thereof. Background technique [0002] Technical background of air conditioning and heating units [0003] For heating in winter, there are mainly coal-fired, natural gas, electric heating and air source heating units. The coal-fired heating method brings serious harm to the environment, which is already within the limits of the government; although natural gas is known as clean energy, in fact, the gas emitted to the ambient atmosphere during its combustion process is not consistent with the gas composition contained in the ambient atmosphere. Strictly speaking, it is not a clean energy, but there are no fine particles in the coal combustion process, and the cost of use is relatively high; the way of heating by electric heating should belong to a complex energy mode. In theory, a 1Kw electric heater can onl...

AI Technical Summary

Problems solved by technology

[0008] It can be seen that there are three major defects in this defrosting method: first, when the indoor temperature does not reach the required heating temperature, the air-conditioning unit will turn to the reverse operation to defrost, so continuous heating operation cannot be realized, and the room Second, once the air conditioner unit enters the defrosting operation, it will inevitably reduce the temperature of the heat transfer medium, resulting in unnecessary energy loss; third, any kind of compressor has its maximum allowable limit evaporation temperature, especially when When the temperature of the heat transfer medium reaches above 25°C, if reverse defrosting is used, then the compressor will run beyond its limit, which will affect the service life of the compressor

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