This standard specifies types and basic parameters, technical requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of dehumidifiers.
This document applies to dehumidifiers with a vapor compression refrigeration cycle driven by an electric motor.
This document does not apply to fresh air dehumidifiers.
2 Normative references
The following normative 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 2423.17 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ka: Salt mist
GB/T 2423.55 Environmental testing - Part 2: Test methods - Test Eh: Hammer tests
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 2894-2008 Safety signs and guideline for the use
GB/T 3241 Electroacoustics - Octave-band and fractional-octave-band filters
GB/T 3767-2016 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for an essentially free field over a reflecting plane
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB 4343.1-2018 Electromagnetic compatibility requirements for household appliances, electric tools and similar apparatus - Part 1: Emission
GB/T 4343.2 Electromagnetic compatibility requirements for household appliances, electric tools and similar apparatus - Part 2: Immunity
GB 4706.1-2005 Household and similar electrical appliances - Safety - Part 1: General requirements
GB 4706.32-2012 Household and similar electrical appliances - Safety - Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
GB/T 5226.1-2019 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements
GB/T6388 Transport package shipping mark
GB 6882 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms
GB/T 9237 Refrigerating systems and heat pumps - Safety and environmental requirements
GB/T 9286-2021 Paints and varnishes - Cross-cut test
GB/T 16842-2016 Protection of persons and equipment by enclosures - Probe for verification
GB 17625.1-2022 Electromagnetic compatibility - Limits - Part 1: Limits for harmonic current emissions (equipment input current ≤16 A per phase)
GB/T 17625.8 Electromagnetic compatibility - Limits - Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤75 A per phase
GB/T 17758 Unitary air conditioners
GB/T 18801-2022 Air cleaner
GB 21551.3-2010 Antibacterial and cleaning function for household and similar electrical appliances - Particular requirements of air cleaner
GB/T26572 Requirements of concentration limits for certain restricted substances in electrical and electronic products
JB/T 7249 Refrigeration and air conditioning apparatus - Terminology
JB/T 10359-2013 Environmental technical requirements for plastics of outdoor units of air conditioners
3 Terms and definitions
For the purpose of this document, the terms and definitions given in JB/T 7249 and the following apply.
3.1
dehumidifier
device for removing moisture from air or reducing the moisture content of air
3.2
comfort dehumidifier
dehumidifier used to meet the requirements of comfortable environment in human activity spaces
3.3
process dehumidifier
dehumidifiers used in process and production processes and occasions with special dehumidification requirements
3.4
dehumidification capacity
DC
amount of water removed by the dehumidifier per unit time under the specified standard working conditions or specific working conditions
Note 1: The unit is kilograms per hour (kg/h) or liters per day (L/d).
Note 2: The nominal dehumidification capacity of the dehumidifier is expressed in DCR.
3.5
dehumidification consumption power
DP
total input power of the dehumidifier during dehumidification operation under the specified standard working conditions or specific working conditions
Note: The unit is kilowatts (kW).
…
4 Types and basic parameters
4.1 Types
4.1.1 The dehumidifiers are classified by the applicable return air temperature range:
a) Type A (18 °C-35 °C);
b) Type B (5 °C-35 °C);
c) Type C (customized).
Note: Return air includes return air mixed with fresh air.
4.1.2 Dehumidifiers are classified by the use purpose:
a) comfort type (Type S);
b) process type (Type G).
Note: Comfort dehumidifiers and process dehumidifiers are represented by AS, BG, etc. depending on return air temperature types.
4.1.3 Dehumidifiers are classified by condensation method:
a) air-cooled type;
b) water-cooled type;
c) combined type.
4.1.4 Dehumidifiers are classified by functions:
a) temperature rise type;
b) temperature drop type;
c) temperature regulation type.
4.1.5 Dehumidifiers are classified by structure:
a) monolithic type;
b) split type.
4.1.6 Dehumidifiers are classified by air supply mode:
a) direct blowing type;
b) air duct type.
4.1.7 Dehumidifiers are classified by capacity regulation mode:
a) single capacity type;
b) non-single capacity type.
Note: Refer to GB/T17758-2023 for the concepts of single capacity type and non-single capacity type.
Contents 1 Scope 2 Normative references 3 Terms and definitions 4 Types and basic parameters 4.1 Types 4.2 Models 4.3 Basic parameters 5 Technical requirements 5.1 General 5.2 Appearance 5.3 Test run 5.4 Sealing performance of refrigeration system 5.5 Dehumidification performance under nominal working condition 5.6 Dehumidification performance under high temperature condition 5.7 Maximum loaded operation 5.8 Dehumidification operation at low temperature 5.9 Removal of condensation and condensate 5.10 Insulation performance under water overflow condition 5.11 Limitation of heat exchange 5.12 Power failure protection 5.13 Security requirements 5.14 Electromagnetic compatibility 5.15 Noise 5.16 Standby power 5.17 Mechanical properties of caster wheel 5.18 Weatherability 5.19 Clean air delivery rate 6 Test methods 6.1 Test conditions 6.2 Installation requirements 6.3 Data processing 6.4 Test run test 6.5 Test for sealing performance of refrigeration system 6.6 Test for dehumidification performance under nominal working condition 6.7 Test for dehumidification performance under high temperature condition 6.8 Test for maximum loaded operation 6.9 Test for dehumidification operation at low temperature 6.10 Test for removal of condensation and condensate 6.11 Dielectric test under water overflow condition 6.12 Test for limitation of heat exchange 6.13 Test for power failure protection 6.14 Safety test 6.15 Electromagnetic compatibility test 6.16 Noise test 6.17 Standby power test 6.18 Test for mechanical properties of caster wheel 6.19 Weatherability test 6.20 Test for clean air delivery rate 6.21 Test for eliminating rate 7 Inspection rules 7.1 End-of-manufacturing inspection 7.2 Sampling inspection 7.3 Type inspection 8 Marking, packaging, transportation and storage 8.1 Marking 8.2 Packaging 8.3 Transportation and storage Annex A (Normative) Test method for dehumidification performance A.1 General A.2 Test procedure A.3 Calculation of test results Annex B (Normative) Test method for dehumidifiers noise B.1 Test site B.2 Measuring instrument B.3 Installation and operating conditions B.4 Designated noise measuring points B.5 Measurement method Annex C (Normative) Methods for correcting the dehumidification consumption power of a dehumidifier with static pressure C.1 General C.2 The fan input power of a dehumidifier with a connected air duct Bibliography Figure 1 Obstacles Figure 2 Obstacle arrangement Figure B.1 The measuring point positions of the dehumidifier installed on the ceiling with a static pressure less than or equal to 12 Pa Figure B.2 The measuring point positions of the dehumidifier installed on the ceiling with a static pressure greater than 12 Pa (return air from the side) Figure B.3 The measuring point positions of the dehumidifier installed on the ceiling with a static pressure greater than 12 Pa (return air from the bottom) Figure B.4 The measuring point positions of the dehumidifier installed on the floor with a static pressure of 0 Pa Figure B.5 The measuring point positions of the dehumidifier installed on the floor with a static pressure greater than 0 Pa and with top air outlet Figure B.6 The measuring point positions of the dehumidifier installed on the floor with a static pressure greater than 0 Pa and with side air outlet Figure B.7 The measuring point positions of the dehumidifier with non-fixed installation Figure B.8 The measuring point positions of the wall-mounted dehumidifier Figure B.9 The measuring point positions of the embedded dehumidifier with four-way air outlet Figure B.10 The measuring point positions of the dehumidifier with side air outlet Figure B.11 The measuring point positions of the dehumidifier with top air outlet Table 1 Normal working ambient temperature conditions Table 2 Test conditions Table 3 Limits of dehumidification capacity per consumption power Table 4 Maximum voltage drop of protective earthing circuit Table 5 Noise limits (sound pressure level) Table 6 Types and accuracy of instruments Table 7 Allowable deviations of test conditions Table 8 Inspection items Table 9 Contents of nameplate
