Air conditioner and fault detection and handling method for subcooled pipe bundle of air conditioner

Abstract

The invention provides a fault detection and handling method for a subcooled pipe bundle of an air conditioner. According to the fault detection and handling method, whether the time required for stabilizing the exhaust temperature is shorter than a first preset time or not is judged in the heating process of the air conditioner, and if the time required for stabilizing the exhaust temperature isshorter than the first preset time, it can be basically determined that a one-way valve breaks down. For further ensuring that the one-way valve breaks down, the stabilized exhaust temperature is compared with the theoretical minimum exhaust temperature value through a main control device, and when the current exhaust temperature is lower than the theoretical minimum exhaust temperature value, itcan be sure that the one-way valve breaks down. According to the fault detection and handling method for the subcooled pipe bundle of the air conditioner, whether the one-way valve in the subcooled pipe bundle breaks down or not can be accurately determined by detecting the time for stabilizing the exhaust temperature of a compressor and the relation between the stabilized exhaust temperature andthe theoretical minimum exhaust temperature value, in this way, a fault can be handled in time, and the situation that the heating effect of the air conditioner is affected by the fault of the one-wayvalve is prevented.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a fault detection and processing method for an air conditioner and its supercooled tube group. Background technique [0002] During the use of the heat pump air conditioner, sometimes the one-way valve in the subcooling tube group fails and cannot work normally. Specifically, it means that the spool of the one-way valve cannot be reset, and the refrigerant opening cannot be closed normally. As a result, the auxiliary capillary in the supercooling tube group cannot play a throttling role during heating, which hinders the heat exchange of the refrigerant, seriously affects the heating effect of the air conditioner, and greatly reduces the user experience effect. [0003] This fault generally occurs in new air conditioners, because the parts in the supercooled tube group are not sufficiently worn in, and the valve core will be jammed and cannot be reset. This problem will basically n...

AI Technical Summary

Problems solved by technology

If the fault is handled properly, the subcooling tube group will return to normal. If the fault is not discovered and repaired in time, it may cause permanent damage to the check valve.

In addition, since this fault does not affect the operation of the air conditioner and occurs at a relatively low frequency, it is not easy to find out. However, this fault does affect the performance of the air conditioner, the heating effect and the user experience. Therefore, how to detect and solve such problems early is crucial important

Images