This document specifies the terms and definitions, product classification and model designation, materials and construction, performance requirements, test methods, inspection rules, marking, warning and instructions for installation and use, packaging, transport and storage in connection with household and commercial gas-fired clothes dryers.
This document is applicable to household gas-fired clothes dryers with a nominal heat input not exceeding 15 kW and a single load drying capacity not exceeding 25 kg, and commercial gas-fired clothes dryers with a nominal heat input not exceeding 100 kW and a single load drying capacity not exceeding 150 kg, which use city gas to dry clothes, textiles, and similar items, and exhaust moisture to the outdoors.
This document is not applicable to gas-fired clothes dryers for industrial use.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging—Pictorial marking for handling of goods
GB/T 2828.1 Sampling procedures for inspection by attributes—Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 4706.1-2024 Safety of household and similar electrical appliances—Part 1: General requirements
GB/T 5013.1 Rubber insulated cables of rated voltages up to and including 450/750 V—Part 1: General requirements
GB/T 5023.1 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V—Part 1: General requirements
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 1: Parallel internal and taper external threads
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2: Taper internal and external threads
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
GB/T 12113-2023 Methods of measurement of touch current and protective conductor current
GB/T 13611 Classification and basic characteristics of city gas
GB/T 16411 Universal test methods of gas burning appliances for domestic use
GB/T 16842 Protection of persons and equipment by enclosures—Probe for verification
GB/T 17626.2-2018 Electromagnetic compatibility—Testing and measurement techniques—Electrostatic discharge immunity test
GB/T 17626.4-2018 Electromagnetic compatibility—Testing and measurement techniques—Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility—Testing and measurement techniques—Surge immunity test
GB/T 17626.6 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.11 Electromagnetic compatibility—Testing and measurement techniques—Part 11: Voltage dips, short interruptions and voltage variations immunity tests for equipment with input current up to 16A per phase
GB/T 17627 High-voltage test techniques for low-voltage equipment—Definitions, test and procedure requirements, test equipment
GB/T 20292-2019 Methods for measuring the performance of tumble dryers for household use
GB/T 23658 Elastomeric seals—Material requirement for seals used in pipes and fittings carrying gaseous fuels and hydricarbon fluid
GB 35848-2024 Commercial gas-burning appliance
GB/T 37499 Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Automatic and semi-automatic valves
GB/T 38603 Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Electronic controller
GB/T 38756 Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Ignition unit
GB/T 39493 Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Pressure regulators
GB/T 45384 Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Pneumatic gas/air ratio pressure regulator
CJ/T 157-2017 Hotplate of lacquered toughened glass for gas appliance
IEC 60456: 2024 Washing machines for household use—Methods for measuring the performance
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 16411, GB/T 38603 and GB/T 20292 as well as the following apply.
3.1
gas-fired clothes dryer
dryer
appliance that uses a fan to send/introduce mixture of the flue gas from gas combustion and air into the drum to dry tumbling fabrics
3.2
exhaust pipe
pipe and its components connected to the dryer that exhausts the flue gas from combustion and the moisture generated during the drying process to the outdoors
3.3
drying thermal efficiency
η
heat effectively utilized by the dryer as a percentage of the heat released by the complete combustion of the gas (calculated based on the lower heating value)
3.4
rated capacity
maximum mass of specific fabrics dried using a specific program, expressed in kg, as declared by the manufacturer
[Source: GB/T 20292-2019, 3.1.18]
3.5
test load
fabric load used for the test
[Source: GB/T 20292-2019, 3.1.6]
3.6
moisture content
difference between the mass of the test load and the adjusted mass of the test load, expressed as a percentage of the adjusted mass of the test load
[Source: GB/T 20292-2019, 3.1.21]
3.7
initial moisture content
moisture content of the test load before the test is conducted
[Source: GB/T 20292-2019, 3.1.22]
3.8
degree of dryness
k
ratio of the mass of the test load to that when the test load is removed from the dryer after a standard drying program
4 Product classification and model designation
4.1 Product classification
4.1.1 Classified by use: household gas-fired clothes dryer (J), and commercial gas-fired clothes dryer (S).
4.1.2 Classified by gas category: manufactured gas-fired clothes dryer (R), natural gas-fired clothes dryer (T), and liquefied petroleum gas-fired clothes dryer (Y).
4.2 Model designation
Model designation of a dryer is shown below:
Example: A natural gas-fired household clothes dryer with a rated capacity of 6 kg is represented as: JRGT6.
5 Materials and construction
5.1 Materials
5.1.1 General requirements
5.1.1.1 The materials of the dryer shall be capable of withstanding the expected mechanical, chemical, and thermal effects during normal use.
5.1.1.2 Metal materials that come into contact with combustion products shall be corrosion-resistant or treated for corrosion resistance and capable of withstanding the thermal effects of combustion products.
5.1.1.3 The materials of non-metal exhaust pipes that come into contact with the mixture of combustion products and moisture in the exhaust system shall be corrosion-resistant and flame-retardant and capable of withstanding the thermal effects during exhaust; metal materials shall be capable of withstanding the corrosion during the air exhausting process and meet the relevant chemical corrosion resistance requirements.
5.1.1.4 The shell of the combustion chamber shall be made of metal materials.
5.1.1.5 Heat retention or insulation materials shall be flame-retardant.
5.1.1.6 Solder shall not contain hexavalent chromium.
5.1.1.7 The materials of the dryer shall not contain asbestos.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Product classification and model designation 4.1 Product classification 4.2 Model designation 5 Materials and construction 5.1 Materials 5.2 Construction 6 Performance requirements 7 Test methods 7.1 Test conditions 7.2 Appearance inspection 7.3 Tightness test of gas system 7.4 Heat input accuracy test 7.5 Combustion condition test 7.6 Ignition performance test 7.7 Pilot ignition capacity test 7.8 Gas pressurizer test 7.9 Temperature rise test 7.10 Test for safety protection device/function 7.11 Vibration resistance test 7.12 Test for drying thermal efficiency 7.13 Test for degree of dryness 7.14 Door durability test 7.15 Test for the performance of glass materials 7.16 Exhaust temperature limit test 7.17 Electrical safety test 7.18 Test for electromagnetic compatibility safety 8 Inspection rules 8.1 End-of-manufacturing inspection 8.2 Type inspection 9 Marking, warning and instructions for installation and use 9.1 Marking 9.2 Warning 9.3 Instructions for installation and use 10 Packaging, transport and storage 10.1 Packaging 10.2 Transport 10.3 Storage Annex A (Informative) Clauses/subclauses of this document that support the basic requirements of GB 16914-2023 Annex B (Normative) Electrical safety Annex C (Normative) Safety of electromagnetic compatibility Bibliography
