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GB 40876-2021: Minimum allowable values of energy efficiency and energy efficiency grades for commercial induction cookers Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
GB 40876-2021: Minimum allowable values of energy efficiency and energy efficiency grades for commercial induction cookers---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/GB40876-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.010 CCS F 01 Minimum allowable values of energy efficiency and energy efficiency grades for commercial induction cookers ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: NOVEMBER 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Energy efficiency grades ... 5 5 Technical requirements ... 5 6 Test and calculation methods ... 5 7 Implementation of the standard ... 7 Appendix A (Normative) Requirements for test pots ... 8 Appendix B (Normative) Test method of thermal efficiency ... 11 Minimum allowable values of energy efficiency and energy efficiency grades for commercial induction cookers1 ScopeThis document specifies the energy efficiency grades and technical requirements, test and calculation methods, and the implementation of standards for commercial induction cookers (hereinafter referred to as "induction cookers"). This document applies to induction cookers with single or multiple heating units, where the rated power of a single heating unit shall not exceed 35 kW and the rated voltage shall not exceed 450 V. This document does not apply to household induction cookers, induction cookers intended to be used under special environmental conditions (such as corrosive environments or environments prone to explosions), outdoor induction cookers, etc.2 Normative referencesThe contents of the following documents constitute the indispensable clauses of this document through normative references in the text. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document. GB 4706.52, Household and similar electrical appliances - Safety - Particular requirements for commercial electric cooking ranges ovens hobs and hob elements3 Terms and definitionsTerms and definitions determined by GB 4706.52, and the following ones are applicable to this document. 3.1Appendix B(Normative) Test method of thermal efficiency The test method of thermal efficiency is as follows: a) Under the test conditions specified in 6.1, place the induction cooker at the laboratory ambient temperature for at least 2 h; b) For the non-integrated flat stove, a standard pot in accordance with A.1 and a standard lid in accordance with A.2 can be used for testing. The standard pot shall be a matching port of the smallest specification to cover the heating area; the mass of the pot m2, and the mass of the lid m3 shall be measured; c) For the non-integrated concave stove, the manufacturer's standard pot and the standard lid of A.3 can be used for testing. The test pot shall be a matching pot of the smallest specification to cover the heating area; the mass of the pot m2, and the mass of the lid m3 shall be measured; d) For the integrated stove, use the manufacturer's standard pot and the standard lid of A.3 for testing; the mass of the pot m2 and the mass of the lid m3 shall be measured; e) Fill the pot with 70% of its volume of water; record the mass as m1; the water temperature is 15 °C ±1 °C; f) Place the matching pot with water in the center of the product heating unit; cover it; g) Put the temperature measuring probe into the center of the pot from the lid hole; when the measuring point is 10 mm away from the pot bottom, read the reading t1 of the temperature measuring instrument; h) Start the induction cooker and quickly adjust it to the maximum rated power; i) When the temperature rise of the water is close to 75 K, turn off the induction cooker; record the consumed electric energy E; read the highest temperature reading t2 after 1 min; calculate the thermal efficiency according to Formula (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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