GB/T 42395.1-2023 PDF EnglishUS$200.00 · In stock · Download in 9 seconds
GB/T 42395.1-2023: Ergonomics - Sound quality limits and test methods for household appliance noise - Part 1: Refrigerator Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 42395.1-2023: Ergonomics - Sound quality limits and test methods for household appliance noise - Part 1: Refrigerator---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT42395.1-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 13.180 CCS A 25 Ergonomics - Sound quality limits and test methods for household appliance noise - Part 1: Refrigerator ISSUED ON: MARCH 17, 2023 IMPLEMENTED ON: OCTOBER 1, 2023 Issued by: State Administration for Market Regulation; Standardization Administration of the PRC. Table of ContentsForeword ... 3 Introduction ... 4 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 5 4 Sound quality limit requirements for noise ... 6 5 Test methods ... 7 Ergonomics - Sound quality limits and test methods for household appliance noise - Part 1: Refrigerator1 ScopeThis document gives the sound quality limit requirements and test methods for refrigerator noise. This document applies to household refrigerators. This document does not apply to commercial refrigerators.2 Normative referencesThe contents of the following documents, through normative references in this text, constitute indispensable provisions of this document. Among them, for dated references, only the edition corresponding to that date applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 4214.1-2017 Test method for noise of household and similar electrical appliances - General requirements GB/T 6882-2016 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 ISO 532-2:2017 Acoustics - Methods for calculating loudness - Part 2: Moore- Glasberg method3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Sound quality The suitability of sound for a specific technical goal or task connotation. 3.2 Loudness Note: If the refrigerator does not have the defrosting function, it only needs to meet the condition a).5 Test methods5.1 Test acoustic environment The sound quality test of refrigerator noise shall be carried out in a hemi-anechoic room. The background noise shall meet the requirements in 5.2 of GB/T 6882-2016. 5.2 Measuring instruments Measuring instruments shall comply with the requirements in Clause 5 of GB/T 4214.1- 2017. 5.3 Test conditions 5.3.1 Sample machine location and installation Place the sample machine at the geometric center of the ground of the test site; adjust the foot to the lowest level of noise generation. Movable parts (such as food racks or ice trays) in the sample machine need to be fastened in an appropriate way, to avoid additional noise caused by excited vibrations. An acoustic reflector shall be provided at the rear of the sample machine. The acoustic reflector shall meet the following requirements: - The reflector is (10±5)mm from the rear of the sample machine; is perpendicular to the ground; see Figure 1; - The size of the reflector shall be larger than the projected size of the rear of the sample machine; - The sound absorption coefficient of the reflector shall be less than 0.06. 5.3.2 Operating conditions The sample machine shall be run with no load. All doors (or covers) shall be closed. The thermostat shall be set as follows: - Refrigerator: 5 °C; - Freezer: -22 °C; - Other function rooms: System default temperature. 5.3.3 Environmental conditions The climatic conditions of the test environment shall meet the following requirements: - Temperature: 20 °C~26 °C; - Relative humidity: 30%~70%; - Atmospheric pressure: 86 kPa~106 kPa. 5.3.4 Test conditions 5.3.4.1 Daily operation mode After the sample machine is equipped according to the requirements of 5.3.1 and 5.3.2 AND operated for at least 16 h, it is tested in a stable operation period. During the test, if the temperature in the refrigerator reaches the temperature set by the thermostat AND the machine stops, the test shall be interrupted at this time. After the compressor restarts for 2 min, the test shall be carried out again. Note: If the sample machine is equipped with a user-operable controller, within a certain period of time, it can control the temperature change of the sample machine; such as the switch of functions such as quick cooling, quick freezing, and holidays; so it is in an off state. 5.3.4.2 Defrost mode After the sample machine is equipped according to the preset conditions of use AND has been running for at least 16 h, turn on the defrost mode. During the recovery period after defrosting, start the test 5 min after the compressor is started. 5.3.5 Microphone position Place the microphone at the center of the front of the sample machine; 500 mm from the refrigerator and 1500 mm from the ground; as shown in Figure 1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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