Monitoring system and monitoring method of air conditioning refrigerant recovery and filling device

Abstract

The invention provides a monitoring system of an air conditioning refrigerant recovery and filling device. A first electromagnetic valve for controlling connection and disconnection of a low-pressure pipe is arranged at the position of the low-pressure pipe of the air conditioning refrigerant recovery and filling device, a second electromagnetic valve for controlling connection and disconnection of a high-pressure pipe is arranged at the position of the high-pressure pipe of the air conditioning refrigerant recovery and filling device, and a relay respectively connected with the first electromagnetic valve and the second electromagnetic valve is used for controlling opening and closing of the first electromagnetic valve and the second electromagnetic valve and generating corresponding relay signals. A weighing device is arranged at the bottom of a working tank of the air conditioning refrigerant recovery and filling device and used for monitoring weight of refrigerant in the working tank in real time and generating corresponding weight monitoring signals. A control device respectively and electrically connected with the relay and the weighing device is used for receiving and recording the relay signals and the weight monitoring signals when the air conditioning refrigerant recovery and filling device is operated and comparing the received signals with a standard monitoring signal set in advance to generate a monitoring report.

Description

technical field [0001] The invention relates to the field of air conditioning system maintenance, in particular to a monitoring system and a monitoring method for monitoring the operation of refrigerant recovery and filling equipment. Background technique [0002] In the specific maintenance and refrigerant filling process of air-conditioning and refrigeration systems (such as automotive air-conditioning and refrigeration systems), basic operations such as refrigerant discharge or recovery, vacuuming and filling are inseparable. When repairing the air-conditioning system, it is often necessary to disassemble the air-conditioning system. At this time, it is necessary to recover or discharge the refrigerant in the system. After confirming that there is no leakage in the system, the air conditioning system can be filled quantitatively. [0003] The country has clear laws and regulations that stipulate the operating requirements of refrigerant filling and recycling machines (ac...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a monitoring system and monitoring method for air-conditioning refrigerant recovery and filling equipment, which can automatically record the user's control process through various sensors and electronic signal feedback, and compare it with the requirements of the specified standard process specifications , form an operation monitoring report, thereby standardizing the operation of the refrigerant recovery and filling machine, and at the same time provide a low-cost and remote supervision implementation plan for third-party supervision, and solve the problem that the operation of the refrigerant recovery and filling machine in the prior art cannot be effectively supervised The problem

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