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GB/T 18835-2025: Grain chillers
Status: Valid
GB/T 18835: Evolution and historical versions
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| GB/T 18835-2025 | English | 439 |
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Grain chillers
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| GB/T 18835-2002 | English | 469 |
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Basic data | Standard ID | GB/T 18835-2025 (GB/T18835-2025) | | Description (Translated English) | Grain chillers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J73 | | Classification of International Standard | 27.200 | | Word Count Estimation | 22,268 | | Date of Issue | 2025-10-05 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 18835-2002 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 18835-2025: Grain chillers---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Standards of the People's Republic of China
ICS 27.200CCS J 73
Grain cooler
Released on October 5, 2025
Implemented on 2026-05-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Replaces GB/T 18835-2002
Table of contents
Foreword ... III
1.Scope...1
2 Normative references...1
3.Terms and Definitions...1
4.Types and Basic Parameters...2
5.Technical Requirements...5
6.Test methods...9
7 Inspection Rules...12
8.Marking, Packaging, Transport and Storage...13
Figure 1.Graphic symbol for grounding...8
Table 1.Test Operating Conditions for Bulk Grain Cooler (Fresh Air Type)...3
Table 2 Test Operating Conditions for Bulk Grain Cooler (Return Air Type) ...3
Table 3 Test Operating Conditions for Packaging Grain Cooler...4
Table 4.Test Operating Conditions for Bulk Grain Flour Cooler...4
Table 5.Cooling Energy Efficiency Ratio and Unit Power Airflow Limits for Bulk Grain Coolers (Fresh Air Type)...6
Table 6 Cooling Energy Efficiency Ratio and Unit Power Airflow Limits for Bulk Grain Coolers (Return Air Type)... 6
Table 7 Refrigeration Energy Efficiency Ratio Limits for Packaged Grain Coolers and Bulk Grain Flour Coolers...7
Table 8 Maximum voltage drop for protective grounding circuit continuity...8
Table 9 Types and Accuracy of Instruments and Meters...9
Table 10.Test Operating Condition Tolerances for Grain Coolers (Average Variation) ...9
Table 11.Test Operating Condition Tolerances for Grain Cooler (Maximum Variation)... 10
Table 12 Inspection Items...13
Foreword
This document conforms to GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting is scheduled.
This document supersedes GB/T 18835-2002 "Grain Coolers". Compared with GB/T 18835-2002, the only differences are structural adjustments and editorial changes.
Aside from the modifications, the main technical changes are as follows.
a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.2002 edition);
b) The term "air enthalpy difference method" and its definition have been removed (see 3.7 of the.2002 edition).
c) Added a classification of grain cooler types (see 4.1);
d) The basic parameters of the grain cooler were changed, the test conditions were modified, and water-cooled and evaporative cooling unit types were added.
The basic parameters for bulk grain coolers, packaged grain coolers, and bulk grain flour coolers have been added (see 4.3,.2002 edition).
(6.1.2)
e) The general requirements and component requirements for grain coolers have been changed (see 5.1, 5.1 and 5.2 in the.2002 edition).
f) The requirements for commissioning have been changed (see 5.3, 5.3.2 of the.2002 edition).
g) The requirements and test methods for cooling energy efficiency ratio have been changed (see 5.7, 6.2.6, 5.3.6, 6.3.3 and 6.3.4 in the.2002 edition).
h) The requirements and test methods for air volume per unit power have been changed (see 5.8, 6.2.4 and 6.2.6, and 5.3.7 and 6.3.4 in the.2002 edition).
(and 6.3.5);
i) The requirements and test methods for maximum operating cooling have been changed (see 5.10 and 6.2.9, 5.3.9 and 6.3.6 in the.2002 edition).
j) Requirements and test methods for cryogenic refrigeration operation have been added (see 5.12 and 6.2.10);
k) Added requirements and test methods for water-side pressure loss (see 5.13 and 6.2.11);
l) The noise requirements have been changed (see 5.14, 5.3.11 in the.2002 edition).
m) The requirements and test methods for insulation resistance, electrical strength, grounding devices, and protection against electric shock have been changed (see 5.17~5.20 and m).
6.2.16~6.2.19 (5.1.10 in the.2002 edition).
n) The requirements and test methods for the water spray test have been removed (see 5.1.10 and 6.3.11 in the.2002 edition).
o) The test methods for airflow and cooling capacity of grain coolers have been removed (see Appendix A of the.2002 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Refrigeration and Air Conditioning Equipment (SAC/TC 238).
This document was drafted by. Hefei General Machinery & Electrical Products Testing Institute Co., Ltd., Jiangsu Yongsheng Air Conditioning Co., Ltd., and Wuxi COFCO Engineering & Technology Co., Ltd.
Limited Liability Company, Zhejiang Qingfeng Environmental Protection Co., Ltd., Guangdong Jirong Air Conditioning Co., Ltd., Beijing Guomao Dongfu Engineering Technology Co., Ltd.
Binglun Environmental Technology Co., Ltd., Qingdao Hisense Hitachi Air Conditioning Systems Co., Ltd., Nanjing Normal University, Chongqing University, Chongqing Urban Science and Technology
Technical colleges, Sinomach General Machinery Technology Co., Ltd., and Hefei General Machinery Research Institute Co., Ltd.
The main drafters of this document are. Xie Hongxi, Dai Yadong, Dai Yajun, Wen Suzhen, Wu Jiesheng, Yang Dongping, Xu Shuwu, Zhang Wenqiang, and Zhang Zhongbin.
Lu Jun, Liu Yuxi, Zan Shichao, Rong Ye, Zhao Chen, Cheng Liquan, Hu Yiqing, Kong Xiaoming.
This document was first published in.2002, and this is its first revision.
Grain cooler
1 Scope
This document specifies the types and basic parameters, technical requirements, inspection rules, and procedures for marking, packaging, transportation, and storage of grain coolers.
The requirements of the paper are described, along with the corresponding experimental methods.
This document applies to cooling equipment that provides a cold source for the low-temperature storage of grains.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 191 Pictorial Symbols for Packaging and Storage
GB/T 2423.17 Environmental testing – Part 2.Test methods – Test Ka. Salt spray
GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1.Sampling Schemes Retrieved by Acceptable Quality Limit (AQL) for Lot-by-Lot Inspection
GB/T 4208 Degrees of protection provided by enclosures (IP codes)
GB/T 4706.1-2024 Safety of household and similar electrical appliances - Part 1.General requirements
GB/T 6388 Shipping and receiving marks for transport packaging
GB/T 9237 Safety and Environmental Requirements for Refrigeration Systems and Heat Pumps
GB/T 9286 Paints and varnishes - Cross-cut test
GB/T 13306 Nameplates
GB 17440 Safety Specification for Dust Explosion Prevention in Grain Processing and Storage Systems
GB/T 17758-2023 Unitary Air Conditioners
GB/T 18430.1-2024 Vapor compression cycle chiller (heat pump) units - Part 1.Chilled water for industrial or commercial and similar uses
Water (heat pump) unit
JB/T 4330-1999 Determination of noise from refrigeration and air conditioning equipment
JB/T 7249 Terminology for Refrigeration and Air Conditioning Equipment
3 Terms and Definitions
The terms and definitions defined in JB/T 7249 and the following terms and definitions apply to this document.
3.1
Equipment used for low-temperature storage of grain and for providing grain warehouses with air at a certain temperature and humidity.
Note. This mainly includes the refrigeration system, air supply and purification devices, and some also include humidity control and air volume regulation devices.
3.2
A grain cooler used to cool and dehumidify grain silos that are stored at low temperatures in the form of raw grain piles.
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