GB/T 7725-2022 English PDF (GBT7725-2022)

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GB/T 7725-2022: Room air conditioner
GB/T 7725-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.30
CCS Y 61
Replacing GB/T 7725-2004
Room air conditioner
房间空气调节器
(ISO 5151:2017, Non-ducted air conditioners and heat pumps - Testing
and rating for performance, NEQ)
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions, symbols ... 7
4 Product classification ... 24
5 Technical requirements ... 27
6 Tests ... 33
7 Inspection rules ... 51
8 Marks, packaging, transportation and storage ... 56
Annex A (normative) Multi-split room air conditioners ... 60
Annex B (normative) Calculation of seasonal energy consumption efficiency of room
air conditioners ... 66
Annex C (informative) Occurrence time of each temperature calculated based on the
meteorological data of a typical city (taking Nanjing as an example) ... 95
Annex D (normative) Tests and calculation methods for cooling capacity and heating
capacity ... 97
Annex E (informative) Measuring instruments ... 120
Annex F (informative) Air volume measurement ... 123
Annex G (informative) Cooling condensed water measurement ... 130
Annex H (informative) Diagram of heating capacity test procedure in D.4 ... 131
Annex I (normative) Measurement of noise ... 136
Annex J (normative) Standby power test ... 143
Annex K (informative) Grading of some performances ... 144
Annex L (informative) Test method for temperature control fluctuation ... 147
Annex M (informative) Refrigerant enthalpy method ... 149
Annex N (informative) Enthalpy method of outdoor side air ... 152
Annex O (informative) Verification test method for indoor side calorimeters ... 156
Annex P (informative) Verification test method for outdoor side calorimeters ... 158
Annex Q (informative) Verification test method for balance calorimeter ... 160
Bibliography ... 161
Room air conditioner
1 Scope
This document specifies the terms and definitions, product classification, technical
requirements, tests, inspection rules, marks, packaging, transportation and storage for
room air conditioners.
This document applies to household and similar free-supply room air conditioners
(hereinafter referred to as air conditioners) that use air-cooled or water-cooled
condensers, fully enclosed motor-compressors, and whose rated cooling capacity is
below 14000W for the purpose of creating a comfortable indoor environment), as well
as ducted air conditioners whose rated cooling capacity is less than 8kW and external
static pressure is less than 25Pa.
This document does not apply to the following products and systems:
- portable air conditioners;
- individual components that cannot form a complete cooling system;
- air conditioners using absorption cooling cycle;
- other ducted air conditioners.
2 Normative references
The following referenced documents are indispensable for the application 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 and storage marks
GB/T 1766, Paints and varnishes - Rating schemes of degradation of coats (ISO
4628:2003, NEQ)
GB/T 2423.3, Environmental testing - Part 2: Testing method - Test Cab: Damp heat,
steady state (GB/T 2423.3-2016, IEC 60068-2-78:2012, IDT)
GB/T 2423.17, Environmental testing for electric and electronic products - Part 2:
Test method - Test Ka: Salt mist (GB/T 2423.17-2008, IEC 60068-2-11:1981, IDT)
GB/T 2828.1, Sampling procedures for inspection by attributes - Part 1: Sampling
3.1.2 heat pump
A cooling system that heats up the indoor air by converting the flow direction of the
refrigerant in the cooling system, absorbing heat from the low temperature outdoor air
and releasing heat to the room.
NOTE: Air conditioners with heat pump heating capabilities are called heat pump air conditioners.
3.1.3 supplementary electrical heating devices
An electric heating device used with a heat pump for heating.
3.1.4 cooling capacity
The sum of the heat removed from the room per unit time when the air conditioner is
in cooling operation under any given working conditions and conditions.
NOTE: The unit is watts (W). The rated value of cooling capacity includes rated cooling capacity,
rated intermediate cooling capacity, rated maximum cooling capacity and rated minimum cooling
capacity. Among them, the rated intermediate cooling capacity is within the range of 50% of the
rated cooling capacity ± 100W.
3.1.5 cooling power input
The power consumed by the air conditioner during the cooling capacity test.
NOTE: The unit is watts (W). The rated value of cooling power input includes rated cooling power
input and rated intermediate cooling power input.
3.1.6 heating capacity
When the air conditioner is in heating operation under any given working conditions
and conditions, the sum of the heat sent into the room per unit time.
NOTE 1: The unit is watts (W). The rated value of heating capacity includes rated heating capacity,
rated intermediate heating capacity, rated maximum heating capacity, rated minimum heating
capacity and rated low temperature heating capacity. Among them, the rated intermediate heating
capacity is within the range of 50% of the rated heating capacity ±100W.
NOTE 2: The heating capacity is only the heating capacity of the heat pump, not including the
heating capacity of the supplementary electric heating device.
3.1.7 heating power input
The power consumed by the air conditioner during the heating capacity test.
NOTE: The unit is watts (W). The rated value of heating power input includes rated heating power
input, rated intermediate heating power input and rated low temperature heating power input.
3.1.8 effective power input
The average electric power input into the air conditioner within the specified time,
including:
a) the power input at which the compressor operates;
b) the power input of the electric heating device used only for defrosting;
c) the power input to all control and safety devices;
d) the power input to heat exchange conveyors (fans, pumps, etc.).
NOTE: The unit is watts (W). The power input of the supplementary heating device is not included.
3.1.9 energy efficiency ratio; EER
Under any given working condition and specified conditions, when the air conditioner
is in cooling operation, the ratio of cooling capacity to effective power input.
NOTE: The unit is watts per watt (W/W).
3.1.10 coefficient of performance; COP
Under any given working condition and specified conditions, when the air conditioner
is in heating operation, the ratio of the heating capacity to the effective power input.
NOTE: The unit is watts per watt (W/W).
3.1.11 standard air
Dry air at 20°C and at a standard barometric pressure of 101.325 kPa, having a mass
density of 1.204 kg/m3.
3.1.12 indoor discharge air-flow
The air volume sent by the indoor unit of the air conditioner to the room or air supply
area per unit time when the ventilation and exhaust doors of the air conditioner for the
exchange of indoor and outdoor air are completely closed (if any) and operated under
specified conditions.
NOTE: The unit is cubic meter per second (m3/s) or cubic meter per ...