T/CAS 748-2023 Car air conditioning refrigerant self-refilling device
T/CAS 748-2023 Car air conditioning refrigerant self-refilling device
Basic Information
Scope
Main technical content: 1. Scope This standard specifies the basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage for DIY filling devices for automotive air conditioning refrigerants. This standard applies to DIY filling devices for automotive air conditioning refrigerants. Note: Hereinafter, the device is referred to as the "filling device". 2. Normative references The following documents are essential for the application of this document. For dated reference documents, only the version dated at the time of reference applies to this document. For undated reference documents, the latest version (including all amendment sheets) applies to this document. - GB/T 1226—2017: General Pressure Gauges - GB/T 2828.1—2012: Counting Sampling Inspection Procedures—Part 1: Batch Inspection Sampling Plans Based on Acceptable Quality Limits (AQL) - GB/T 4857.5: Packaging—Transport Packages—Drop Test Methods - GB/T 7528: Rubber and Plastic Hoses and Hose Assemblies—Terminology - GB/T 9575—2013: Rubber and Plastic Hoses—Hose Specifications and Maximum/Minimum Internal Diameters and Cutting Length Tolerances - GB/T 20025.2—2005: Rubber and Plastic Hoses and Hose Assemblies for Automotive Air Conditioning—Resistance to Refrigerant R-134a 3.1 DIY Filling Device for Automotive Air Conditioning Refrigerant A device with connectors, hoses, pressure gauges, and valves, capable of being tightly connected to a refrigerant tank for adding refrigerant to automotive air conditioning systems. Note 1: When insufficient refrigerant in the automotive air conditioning system affects its cooling effect, the filling device is used to self-refill the refrigerant without needing to first remove the remaining refrigerant from the system. Note 2: Operating steps: 1. Open the automotive engine hood. 2. Start the car and set the air conditioning temperature to the lowest setting and the airflow to the maxi