GB/T 21145-2023Mechanical transport refrigeration units (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document replaces GB/T 21145-2007 "Refrigeration Units for Transport". Compared with GB/T 21145-2007, except for structural adjustment and In addition to editorial changes, the main technical changes are as follows.

a) Increase the scope of application (see Chapter 1);

b) The definitions of "cooling capacity", "compressor driving power", "auxiliary power consumption" and "total input power" have been added (see 3.3~3.6);

c) Changed the independent and non-independent classification (see 4.1.4, 4.4 of the 2007 edition);

d) The classification methods of refrigerated type and refrigerated type are added (see 4.1.6);

e) Increase the basic parameters and model of the unit (see 4.2, 4.3);

f) Changed the working condition parameter conditions of the refrigeration unit for transportation, and gave the nominal working conditions of the unit according to the applicable temperature range of the unit. Environmental conditions (see 4.2.3, 6.1.2 of the 2007 edition);

g) The technical requirements and test methods for start-up operation and maximum load continuous operation have been added (see 5.6.6, 5.6.7, 6.3.6 and 6.3.7);

h) Increase the performance coefficient requirements of electric drive units (see 5.6.11);

i) The electric strength test of the unit has been changed (see 6.3.11, 6.3.8.1 of the 2007 edition);

j) Added the requirements for the use of flammable refrigerants (see 8.1);

k) Changed the cooling capacity test method for single-temperature zone units, and added the cooling capacity test method for multi-temperature zone units (see Appendix A, Appendix A of the 2007 edition);

l) When the unit conducts related tests, the reading tolerance requirements of the parameters of the test conditions are changed (see Table A.1 of Appendix A, the 2007 edition Table 3 of 6.1.3);

m) The vibration test method has been changed (see Appendix B, Appendix B of the 2007 edition).

1 Scope

This document specifies the types, basic parameters, technical requirements, test methods, and inspection specifications of refrigeration units for transportation (hereinafter referred to as "units"). Rules, signs, packaging, transportation and storage, etc.

This document applies to vehicles, trains, engine-driven or electric (electric motor) driven transport refrigeration units.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 191 Packaging, storage and transportation icon marks

GB/T 1771 Determination of neutral salt spray resistance of paints and varnishes

GB 2894-2008 Safety Signs and Guidelines for Their Use

GB 4706.1-2005 Safety of Household and Similar Electrical Appliances Part 1: General Requirements

GB 4706.32-2012 Special requirements for the safety of heat pumps, air conditioners and dehumidifiers for household and similar electrical appliances

GB 5226.1 Safety of machinery and electrical machinery and electrical equipment - Part 1: General technical requirements

GB 5296.1 Instructions for use of consumer products - Part 1: General

GB/T 5773 Performance test method for positive displacement refrigerant compressors

GB/T 6388 Transport packaging receipt and delivery marks

GB/T 9237 Refrigeration system and heat pump safety and environmental requirements

GB/T 13306 Signage

GB/T 20651.1 Safety of reciprocating internal combustion engines Part 1: Compression ignition engines

JB/T 4330-1999 Determination of Noise of Refrigeration and Air Conditioning Equipment

JB/T 7249 Terminology for Refrigeration and Air Conditioning Equipment

3 Terms and Definitions

The following terms and definitions defined in JB/T 7249 apply to this document.