On January 13, 2011, the approval meeting for the washing machine parts industry standard "Technical Requirements for Washing Machine Inlet Valve" and "Technical Requirements for Washing Machine Drain Pump" was held in Shenzhen, Guangdong. At the meeting, Lu Jianguo, secretary general of the National Committee for Standardization of Cleaning Committees for Household Appliances Standardization Technical Committee, revealed that the two standards after the approval will be submitted to the Ministry of Industry and Information Technology for approval. It is expected to be officially implemented from the end of 2011 to the beginning of 2012.
It is understood that these two standards are the first standards set by the washing machine industry for parts and components. Although it is a recommended industry standard and the requirements are not particularly strict, the implementation of these two standards is of great significance to the washing machine industry.
Relatively loose
The washing machine inlet valve and drain pump are the main and special parts of the washing machine, which are closely related to the water intake, drainage and working performance of the washing machine. The technical requirements of the washing machine inlet valve and the technical requirements of the washing machine drain pump for the washing machine inlet valve And the definition, classification, technical requirements and test methods of the drainage pump are specified. The person in charge of a famous washing machine company privately told the "Electric Appliance" reporter: "This standard is not high in terms of technical requirements. This is mainly due to the overall development level of the industry. For companies like us, the procurement of parts and components The standard will be higher."
The reporter saw in the preparation of the two standards that the standard drafting working group of "Technical Requirements for Washing Machine Inlet Valve" and "Technical Requirements for Washing Machine Drain Pump" was established in early April 2010. Among them, the members of the drafting working group of "Technical Requirements for Washing Machine Inlet Valve" include China Household Electric Appliance Research Institute, Hefei Rongshida Sanyo Electric Co., Ltd., Ningbo Xinle Electric Co., Ltd., Zhejiang Kebo Electric Co., Ltd., Wuxi Little Swan Ltd. and Jinhua Hongchang Electric Co., Ltd., etc. In November 2010, a total of 25 copies of the standards were issued and a total of 24 opinions and suggestions were collected. The members of the Standard Drafting Working Group of "Technical Requirements for Washing Machine Drain Pumps" include China Household Electric Appliance Research Institute, Ningbo Haoguan Electric Co., Ltd., Hefei Rongshida Sanyo Electric Co., Ltd., Ningbo Xinle Electric Co., Ltd. and Wuxi Little Swan Co., Ltd. In November 2010, a total of 25 copies of the standards were issued and a total of 22 opinions and suggestions were collected.
"Electric Appliance" reporter saw in the standard review draft, "Technical Requirements for Washing Machine Inlet Valve" proposed flow characteristics, water pressure resistance, high and low temperature resistance, noise and vibration test, self-locking overload, mechanical strength of the casing, free fall and resistance Technical requirements such as burst pressure and test conditions and methods. The standard considers that the inlet water pressure range of the inlet valve is relatively large, and the flow characteristics of the inlet valve of the washing machine and the water pressure resistance are evaluated in stages according to the inlet pressure range. The technical requirements for the inlet valve of the washing machine stipulate that the flow characteristics of the inlet valve should meet the requirements of Table 1. The water pressure resistance of the inlet valve should meet the requirements of Table 2. The flow rate fluctuation range of the constant current valve at rated voltage and rated water pressure should be within ±15% of the rated value. In addition, the standard for the inlet valve noise limit is: after the inlet valve is tested, its A-weighted upgrade power noise value should be no more than 45dB (A); the valve body interface strength is defined as: valve body thread interface Should be able to withstand 2Nm torque test, the interface should not be cracked after the test, the valve body thread interface up and down, left and right should be able to withstand 50N, time (10 ± 1) s force, the valve body without damage and deformation after the test.
In the "Technical Requirements for Washing Machine Drain Pumps", the technical methods, test methods and calculation formulas for volume flow, lift, maximum efficiency, trouble-free running time, sealing, hot and cold water test, temperature rise and inter-turn pressure are proposed. . The standard considers that the power range of the drainage pump is relatively large, and the efficiency of the washing pump of the washing machine is segmented according to the input power.
"Technical Requirements for Washing Machine Drain Pumps" states that the efficiency of the drainage pump during normal operation at rated voltage shall not be less than the value specified in Table 3. In addition, the standard also stipulates that when the drain pump is working normally under the rated voltage, the volume flow fluctuation range should be within ±6% of the rated value; when the drain pump is working normally under the rated voltage, the head fluctuation range should be ±6 of the rated value. Less than %.
The standard requirements for trouble-free running time and turn-to-turn voltage are: the rated failure of the drain pump should be no less than 1000h; the motor winding of the drain pump should be able to withstand the impact voltage test of insulation 1800V, 0.5μs. The test voltage waveform was not severely distorted and the voltage (peak) was 1800V. In addition, the standard requires that the A-weighted sound power level noise of the drain pump should be no more than 60dB (A).
Nor does the normative role
"The formulation of these two component standards is not to delineate the industry threshold, but to regulate the production of component companies through a unified approach." Lu Jianguo admits that the previous washing machine standards were more focused on the whole machine, parts and components. There is no uniform standard, and parts companies are produced according to their own enterprise standards and procurement specifications of the whole machine. In this process, disputes often occur between the whole machine and the parts and components enterprises. The implementation of these two standards will be Provide the necessary guidelines for resolving these contradictions and disputes.
The standard preparation instructions also state that as the main component of the water intake of the washing machine, the quality level of the inlet valve is directly related to the quality of the washing machine. The technical requirements of the "washing water inlet valve technical requirements" and "washing machine drainage pump technical requirements" are designed to improve the technical level and professional level of the washing machine professional parts production and supporting industry, and at the same time ensure the overall quality of the washing machine.
It is understood that the development of China's washing machine manufacturing industry is huge. The annual demand for special water inlet valves and drainage pumps for washing machines exceeds 10 million sets. However, the manufacturing plants for washing water inlet valves and drainage pumps are mainly small and medium-sized enterprises. . "The implementation of this standard will play an active role in the process of intensive production and supply conversion in the future." A person in charge of the washing machine company told reporters.
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