Method for detecting abnormality of refrigerating capacity of automobile air conditioner

Abstract

The invention discloses a method for detecting abnormality of refrigerating capacity of an automobile air conditioner. The implementation steps are as follows: when a system is activated, sequentially judging whether the system is activated within the limit time after cold start of an automobile, judging whether the temperature of the environment outside the automobile allows to open a compressor, and judging whether the automobile is in an idle state; and detecting the automobile air conditioner if all conditions are met, judging the running abnormality or running faults, and displaying the running state and the fault information of the automobile air conditioner. The method can be used to detect the abnormality of the refrigerating capacity of the automobile air conditioner, and the fault information can be displayed, so that a user is reminded of overhauling an air conditioner system, and the operation of the automobile air conditioner with faults is avoided, as a result, the service life of each part of a refrigerating system is prolonged.

Description

technical field [0001] The invention relates to a method for detecting the abnormality of the refrigeration capacity of an automobile air conditioner. Background technique [0002] For automotive air conditioning, the controller is the only interface for human-computer interaction between passengers in the car and the air conditioning system. The air conditioning controller panel of the existing car air conditioner usually has Auto, A / C (compressor switch control), temperature setting, wind speed adjustment, air outlet mode setting, internal and external circulation setting, defrosting, seat heating, etc. The knob or button is used to control the running state of the car air conditioner. In addition, some air conditioner controller panels also have display screens, indicator lights, etc., which are used to display information such as the switch status of the compressor, the gear position of the blower, and the air outlet mode. [0003] Since the automobile air conditioner ...

AI Technical Summary

Problems solved by technology

[0003] Since the automobile air conditioner is installed on a moving vehicle, it has to withstand severe and frequent vibrations and shocks, so the automobile air conditioner is prone to refrigerant leakage; if the vehicle is used in harsh weather conditions, the surface of the condenser is prone to dirty clogging

Leakage of refrigerant, dirty blockage on the surface of the condenser, dirty blockage of the refrigerant pipeline, ice blockage, etc. will cause the cooling capacity of the air conditioning system to decline

[0004] However, in the existing automotive air-conditioning controllers, when the air-conditioning system has abnormal problems such as lack of refrigerant and the surface of the condenser is dirty and the cooling capacity drops, the controller panel will not display the corresponding information, and it is difficult for users to find out the problem in time.

Especially in the spring and autumn seasons, the requirements for the cooling capacity in the car are relatively low. Even if the cooling capacity of the car air conditioner is insufficient due to the above-mentioned problems, the user will not be able to detect the abnormality of the car air conditioner in time.

Since the abnormality of the car air conditioner cannot be found in time, it will cause the car air conditioner to run with faults for a long time, thereby shortening the service life of the components of the car air conditioner

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