Detail of GB/T 38048.4-2024

Introduction of GB/T 38048.4-2024

GB/T 38048.4-2024 Surface cleaning appliances - Part 4: Cordless dry vacuum cleaners for household or similar use - Methods for measuring the performance 1 Scope This document is applicable to measurements of the performance of cordless dry vacuum cleaners for household use or under conditions similar to those in households. The results obtained under this document are intended to be comparable to the results obtained under GB/T 38048.2-2021 for mains-connected vacuums. The purpose of this document is to specify essential performance characteristics of cordless dry vacuum cleaners which are of interest to users and to describe methods for measuring these characteristics. Note 1: Owing to the influence of environmental conditions, variations in time, origin of test materials and proficiency of the operator, most of the described test methods give more reliable results when applied to comparative testing of a number of appliances at the same time, in the same laboratory and by the same operator. Note 2: This document is not intended for mains-operated vacuum cleaners or cleaning robots. Note 3: Cordless handheld vacuums are excluded, except for 5.7.2 and 5.8. For safety requirements, reference is made to IEC 60335-1 and IEC 60335-2-2. A recommendation on information for the consumer at the point of sale is given in Annex B of GB/T 38048.2-2021. 2 Normative references Clause 2 of GB/T 38048.2-2021 applies with the following addition: GB/T 35758-2017, Household electrical appliances - Measurement of standby power GB/T 38048.2-2021, Surface cleaning appliances - Part 2: Dry vacuum cleaners for household or similar use - Methods for measuring the performance 3 Terms and definitions Clause 3 of GB/T 38048.2-2021 applies with following additions. 3.101 cordless dry vacuum cleaner dry vacuum cleaner that is not mains-operated Note: The term "cordless" is equivalent to "battery-operated" throughout the document. 3.102 fully charged point during charging when, according to the manufacturer's instructions, by indicator or time period, the product does not need to be charged anymore (see 4.6.1 01 for specific charging instructions) 3.103 fully discharged point in use when the manufacturer's instructions state the product is fully discharged or the vacuum motor stops spinning, whichever comes first 3.104 charging time time required to fully charge a cordless dry vacuum cleaner from a fully discharged condition 3.105 replacement battery battery that is identical in type, fit and performance to the battery supplied with the cordless product, and is changeable without tools 3.106 runtime effective cleaning time provided by a cordless dry vacuum cleaner from a fully charged condition as per 3.102 until the vacuum has dropped to less than 40 % of initial suction performance or when the vacuum is fully discharged as per 3.103, whichever comes first 4 General conditions for testing Clause 4 of GB/T 38048.2-2021 applies with the following modifications. 4.3 Voltage and frequency Replace the content of GB/T 38048.2-2021 with the following: Unless otherwise stated, charging for measurements shall be carried out at rated voltage with a tolerance of ±1 % and, if applicable, at rated frequency. Cordless dry vacuum cleaner chargers not marked with rated frequency shall be powered at either (50 ± 1 ) Hz or (60 ± 1 ) Hz with a total harmonic distortion < 3 %, as is common in the country of use. All charging should occur at the nominal system voltage of the country concerned. 4.4 Running-in of dry vacuum cleaner Replace the heading and content of GB/T 38048.2-2021 with the following: 4.4 Running-in of cordless dry vacuum cleaner Prior to the first test (and following preparations in line with the manufacturer's instructions) on a new cordless dry vacuum cleaner, it shall be fully charged in accordance with the manufacturer's instructions and then discharged by running with unrestricted air flow. The sequence shall be repeated one more time with an interval of at least 30 min after each discharge. No operation shall be carried out during this waiting time. For active nozzles during discharge, the agitation device shall be running but not in contact with the floor. Prior to conducting any series of tests, the age, condition, and history of the product shall be recorded. 4.4.101 Preparation of battery Any unused Li-ion battery shall be fully charged and fully discharged once prior to conducting the first test on a cordless dry vacuum cleaner. All other battery chemistry/technology types shall be fully charged and fully discharged three times prior to conducting the first test on a cordless dry vacuum cleaner. Fully charged and fully discharged conditions are defined in 3.102 and 3.103, respectively. Note: It is understood that some cordless vacuums do not allow discharge below a certain energy level for battery protection. 4.6 Operation of the dry vacuum cleaner Subclause 4.6 of GB/T 38048.2-2021 applies with the following addition to the end of the subclause: For declaration and compliance purposes, related tests for a given cleaning task shall be conducted with the same cordless dry vacuum cleaner setting, cleaning head and cleaning head setting. These settings shall be reported. Related tests are: ——tests measuring the dust removal from carpet, the energy consumption for cleaning a carpet, runtime on carpet, and the noise level on carpet; ——tests measuring the dust removal from hard floor with crevices and the energy consumption for cleaning a hard floor with crevices, runtime on hard floor, and the noise level on hard floor. 4.6.101 Charging of the cordless dry vacuum cleaner All testing performed on cordless dry vacuum cleaners is to be non-invasive. Only the battery(-ies) provided with the product, and replacement battery(-ies) as per 3.105, shall be used to power the vacuum. Each test is started with a fully charged sample, as per 3.102. The manufacturer's charging unit, module, or docking system that is provided with the specific cordless dry vacuum cleaner under test, shall be used for recharging the battery to a fully charged state. The charging time could be 24 h in length or longer, as determined by the items below. Proceed in the following order until a charging duration is determined.

Contents of GB/T 38048.4-2024