Heat exchanger for external unit, anti-high temperature control device, control method and air conditioner

Abstract

The invention provides a heat exchanger for an external unit, a high temperature prevention control device, a control method and an air conditioner, and relates to the technical field of air conditioning. The heat exchanger for an external unit at least includes a first heat exchange area and a second heat exchange area, and also includes Heater inlet pipe, first shunt pipe and second shunt pipe; both ends of the first shunt pipe are respectively connected to the inlet pipe of the heat exchanger and the inlet pipe of the first heat exchange area, and the two ends of the second shunt pipe are respectively connected to the heat exchanger The heat exchanger of the external unit further includes a throttling device, and the throttling device is suitable for throttling the refrigerant entering the first heat exchanging area through the first branch pipe. The invention divides the heat exchanger of the external unit into two parts, and throttling a certain part of the heat exchanger through a throttling device to adjust the heat exchange effect of the heat exchanger, so as to avoid the indoor temperature fluctuation caused by the drastic fluctuation of the load of the unit Problems such as poor heating effect; and pressure protection caused by high temperature failure or built-in overload protection of the compressor.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an external unit heat exchanger, a high temperature prevention control device, a control method and an air conditioner. Background technique [0002] The air conditioner has a heating function. However, heating when the external ambient temperature is high will cause the compressor discharge pressure and discharge temperature to be too high. At this time, the air conditioning system needs to be de-loaded to reduce the compressor The exhaust pressure and temperature of the air conditioner can be controlled to ensure the normal operation of the air conditioner unit and ensure the reliability of the unit. [0003] In the prior art, in order to solve the problem of high exhaust pressure and exhaust temperature, the temperature of the indoor pipe temperature is detected during heating. When the temperature of the indoor pipe temperature is high, the air conditioner unit enter...

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Problems solved by technology

[0004] In the above high temperature protection process, after the external fan is turned on again, the heat exchange effect is improved, and the exhaust temperature and exhaust pressure rise rapidly, so it enters the high temperature protection mode again, and the external fan is frequently started and stopped, resulting in indoor air temperature and indoor working conditions. Fluctuations affect the heating effect; in addition, when the external fan is turned off, the heat exchange effect cannot be reduced quickly, even when the external ambient temperature is high, there will be high temperature protection failure in the case of natural wind, start the pressure protection or the built-in compressor Overload protection, causing the air conditioner to stop

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