Air conditioner based on pipeline blocking self-diagnosis method

Abstract

The invention discloses an air conditioner based on a pipeline blocking self-diagnosis method. Existing hardware facilities, such as an indoor environment temperature sensor and an indoor coil pipe temperature sensor, of an air conditioner are mainly utilized for collecting, analyzing and processing data by adding control logic. According to the air conditioner, the aims that in the first-time power-on trial run process after installation of the air conditioner, pipeline blocking faults generated by product manufacturing or pipeline blocking faults generated by installation are automatically eliminated in advance, and damage of long-time run with the faults to a compressor and other core valuable components is avoided are mainly achieved. The method has the beneficial effects of being simple, reliable, low in cost and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of control in air-conditioning and refrigeration engineering, and is mainly applicable to equipment-cooling air-conditioners, especially split-type air-conditioners in which a compressor is installed in an indoor unit. Background technique [0002] Since the indoor ambient temperature is relatively stable, in order to improve the reliability of the air conditioner, the compressor is designed in the indoor unit. As a result, during the production of this type of indoor unit, the standard machine cannot be connected to the ordinary production line, and the compressor is turned on for trial operation. In order to check whether the air conditioner is normal. [0003] For air conditioners with compressors in the room, if the compressor is turned on for trial operation during production, the refrigerant cannot be recovered, so it needs to be re-evacuated and refilled with refrigerant. Only functional checks are c...

AI Technical Summary

Problems solved by technology

Others in the refrigeration system, such as high-pressure switches and low-pressure switches, which are welded together, may be inserted too deep and cause pipeline blockage

In addition, during installation, it often happens that image 3 When the shut-off valve 9 of the indoor unit or outdoor unit in the air conditioner is not opened, the air conditioner is powered on and started to run. At this time, because the shut-off valve 9 is closed, the refrigerant cannot circulate and the pipeline is blocked.

When the ambient temperature is low, this kind of refrigerant pipeline system blockage occurs, and it is impossible to artificially distinguish whether the air conditioning system is normal according to the routine installation and trial operation

Therefore, it is necessary to rely on the automatic judgment of the control system, otherwise, if the pipeline system is blocked, the air conditioner will continue to stop at high pressure or low pressure or the compressor will be overheated, and the long-term operation with faults will eventually cause damage to the compressor

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