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This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 28378-2012 Minimum allowable values of water efficiency and water efficiency grades for showers and the following main technical changes have been made with respect to GB 28378-2012:
——the scope of standard is modified;
——some terms and definitions are modified;
——the basic requirements are modified;
——the spray force requirements are added;
——the index of water efficiency grade for shower is modified;
——the index of uniformity of flow is modified.
This standard was proposed by the Standardization Administration of the People’s Republic of China and the Department of Resource Conservation and Environmental Protection of the National Development and Reform Commission of the People's Republic of China.
This standard is under the jurisdiction of the Standardization Administration of the People’s Republic of China.
This standard was firstly issued in April, 2012 and is revised for the first time.
Minimum allowable values of water efficiency and water efficiency grades for showers
1 Scope
This standard specifies the water efficiency grade, technical requirements and test methods for shower.
This standard is applicable to the water efficiency evaluation of showers (including shower head or its combinations) used in sanitary facilities such as lavatories (restrooms, bathrooms) and shower rooms installed in buildings with nominal pressure (static pressure) not greater than 1.0 MPa and medium temperature of 4℃~90℃.
It is not applicable to the shower with heating apparatus and with constant temperature.
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 33733 Terminology and classification for the kitchen and sanitary ware fittings
3 Terms and definitions
For the purposes of this document, the terms and definitions established in GB/T 33733 and the following apply.
3.1
uniformity of flow
ΔF
the difference between the highest average flow and the lowest average flow of the hand-held shower head under different test pressures
3.2
minimum allowable values of water efficiency for showers
the maximum allowable flow of the shower under the test conditions specified in the standard
3.3
evaluating values of water conservation for showers
the maximum allowable flow of water-conservation shower under the test conditions specified in the standard
Note: The evaluating values of water conservation is a requirement for evaluating the water-conservation shower.
3.4
spray force
P
the impact force in case of spraying of the hand-held shower head under the test conditions specified in the standard
4 Water efficiency grades for showers
4.1 The water efficiency for showers is classified into 3 grades, with Grade 3 representing the lowest one.
4.2 The flow of all showers shall meet those specified in Table 1.
4.3 If the hand-held shower head is equipped with multiple water outlet modes, the flow of each water outlet mode shall be tested separately, and the water efficiency grade of the maximum flow is taken as the water efficiency for the shower.
4.4 If the fixed shower head is equipped with multiple water outlet functions, the flow of each water outlet function shall be tested separately, and the water efficiency grade of the maximum flow is taken as the water efficiency grade for the shower.
Table 1 Index of water efficiency grade for shower In L/min
Type Flow
Grade 1 Grade 2 Grade 3
Hand-held shower head ≤4.5 ≤6.0 ≤7.5
Fixed shower head ≤9.0
5 Technical requirements
5.1 Basic requirements
Showers shall meet the requirements of the standard prescribed expressly.
5.2 Spray force
As tested by Annex A, the average spray force of hand-held shower head shall not be less than 0.85 N.
Note: If the shower head is equipped with multiple water outlet modes, the maximum average spray force shall be taken.
5.3 Uniformity of flow
As tested by Annex A, the uniformity of maximum outlet flow of hand-held shower head shall not be greater than 4.0 L/min.
5.4 Minimum allowable values of water efficiency for showers
The minimum allowable values are Grade 3 of the water efficiency grade.
5.5 Evaluating values of water conservation for showers
The evaluating values are Grade 2 of the water efficiency grade.
6 Test methods
The test methods for spray force, flow and uniformity of flow shall be carried out according to Annex A.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Water efficiency grades for showers 5 Technical requirements 6 Test methods Annex A (Normative) Test methods
ICS 91.060 Y 71 中华人民共和国国家标准 GB 28378—2019 代替GB 28378—2012 淋浴器水效限定值及水效等级 Minimum allowable values of water efficiency and water efficiency grades for showers 2019-12-31发布 2020-07-01实施 国家市场监督管理总局 国家标准化管理委员会 发布 前言 本标准按照GB/T 1.1—2009给出的规则起草。 本标准代替GB 28378—2012《淋浴器用水效率限定值及用水效率等级》,与GB 28378—2012相比,主要技术变化如下: ——修改了标准的范围; ——修改了部分术语和定义; ——修改了基本要求; ——增加了喷射力要求; ——修改了淋浴器水效等级指标; ——修改了流量均匀性指标。 本标准由国家标准化管理委员会、中华人民共和国国家发展和改革委员会资源节约和环境保护司提出。 本标准由国家标准化管理委员会归口。 本标准于2012年4月首次发布,本次为第一次修订。 淋浴器水效限定值及水效等级 1 范围 本标准规定了淋浴器的水效等级、技术要求和试验方法。 本标准适用于安装在建筑物内的冷、热水供水管路末端,公称压力(静压)不大于1.0 MPa,介质温度为4℃~90℃条件下的盥洗室(洗手间、浴室)、淋浴房等卫生设施上使用的淋浴器(含花洒或花洒组合)的水效评价。 本标准不适用于自带加热装置的淋浴器和恒温淋浴器。 2规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。 GB/T 33733厨卫五金产品术语与分类 3术语和定义 GB/T 33733界定的以及下列术语和定义适用于本文件。 3.1 流量均匀性uniformity of flow ΔF 在不同试验压力下,淋浴器手持式花洒的最高平均流量与最低平均流量之差。 3.2 淋浴器水效限定值minimum allowable values of water efficiency for showers 在标准规定的试验条件下,淋浴器所允许的最大流量。 3.3 淋浴器节水评价值evaluating values of water conservation for showers 在标准规定的试验条件下,节水型淋浴器所允许的最大流量。 注:节水评价值是评价节水型淋浴器的规定要求。 3.4 喷射力 spray force P 在标准规定的试验条件下,淋浴器手持式花洒喷射时所达到的冲击力。 4淋浴器水效等级 4.1 淋浴器水效等级分为3级,其中3级水效最低。 4.2各等级淋浴器的流量应符合表1的规定。 4.3手持式花洒若其所带花洒有多种出水方式时,分别试验每种出水方式的流量,以最大流量所达到的水效等级作为该淋浴器的水效等级。 4.4 固定式花洒若其所带花洒有多种出水使用功能时,分别试验每种出水使用功能的流量,以最大流量所达到的水效等级作为该淋浴器的水效等级。 表1 淋浴器水效等级指标 单位升每分 类型 流量 1级 2级 3级 手持式花洒 ≤4.5 ≤6.0 ≤7.5 固定式花洒 ≤9.0