Fresh air ventilator and method and device for preventing-cold-air control of fresh air ventilator

Abstract

The invention discloses a fresh air ventilator and a method and device for preventing-cold-air control of the fresh air ventilator. The method comprises the following steps that in the process of switching the fresh air ventilator from a heating mode to a refrigeration mode, the set temperature and the air supply temperature of the fresh air ventilator and the middle temperature of an indoor heat exchanger of the fresh air ventilator are obtained in real time; the current air outlet speed and the set air speed of the fresh air ventilator are obtained; and according to the set temperature, the air supply temperature, the middle temperature of the indoor heat exchanger, the current air outlet speed and the set air speed, the air outlet speed of the fresh air ventilator is adjusted. According to the method, the adjusting time of the air outlet speed can be shortened, the frequency of starting and stopping of the ventilator is reduced, and accordingly the effect of preventing cold air is greatly improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, and in particular to a cold wind prevention control method for a fresh fan, a non-transitory computer-readable storage medium, a cold wind prevention control device for a fresh fan, and a fresh fan. Background technique [0002] When the fresh air fan is running in defrost mode during heating, or in the oil return mode when the heating is switched to cooling mode, etc., the fresh air fan can generally be controlled to enter the anti-cold wind operation state to prevent cold wind from blowing out. [0003] At present, most of the relevant anti-cold wind control schemes for fresh air fans follow the scheme of conventional air-conditioning internal units. Specifically, according to the temperature value detected by the temperature sensor arranged in the middle of the current indoor heat exchanger, the start-stop and windshield switching control of the indoor fan can be performed. However, ...

AI Technical Summary

Problems solved by technology

However, the following problems will occur when the above scheme is adopted: 1) when the fan is turned off, the temperature value detected by the temperature sensor in the middle will rise rapidly, which is very easy to turn on the anti-cold fan; running, will cause the temperature value detected by the middle temperature sensor to decrease rapidly, so that the fan will re-enter the off state

This will cause the fan to start and stop frequently; 2) After the fan is turned on and the temperature of the air supply is detected to be above 37°C for 10 minutes, the temperature value detected by the temperature sensor in the middle is still low, which makes the fan maintain at a low speed for a long time Running state, resulting in too long windshield switching time

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