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The results of the latest dishwasher product quality supervision and random inspection released by the State Administration of Market Supervision show that 4 of the 20 batches of samples samples sampled are unqualified, and the unqualified discovery rate is 20%. Among them, there are two batches of unqualified samples for grounding measures projects.
20% of the 20 batches of samples failed the test
Two batches of grounding measures failed
A dishwasher is a machine that uses chemical, mechanical, thermal and electrical methods to wash, rinse and dry tableware such as dishes, plates, glassware, knives and forks and cooking utensils.
According to the different installation methods, it can be divided into cabinet type, embedded, desktop and sink type, but the working principle is mostly the same: put the dishes that need to be washed such as dishes and chopsticks into the tray in the dishwasher, add detergent; when starting the electrical washing, the water sprayed by the spray arm can be multi-directional, high temperature and high pressure to clean the tableware.
The reporter learned that the 20 batches of dishwasher samples sampled by the state this time are all from the e-commerce platform. The 16 items that the national sampling focused on testing according to the national mandatory standards are closely related to the safety performance of the samples. Among them, the grounding measure project is particularly important. However, this label is called the sample produced by Henan Hongyunlai Electric Appliance Co., Ltd. and is not implemented in accordance with national standards.
Weikai Detection Technology Co., Ltd. BathIng Apparatus Engineering Department Director Lau Dewen: "When we checked the prototype structure, we found that the heating plate did not have any grounding protection, but according to the standard, the easily accessible metal of this type of appliance should be permanently and reliably connected to the grounding terminal inside the appliance, if the heating plate leaks, the electricity can not flow away from the protective ground, it can only flow from the human body, which will cause the consumer to be electrocuted." ”
Four batches of sample plug residual voltage tests failed
In this supervision and random inspection, all 4 batches of samples were unqualified, and the plug residual voltage test did not meet the requirements of the national standard.
Shi Lili, engineer of the bath apparatus engineering department of Weikai Detection Technology Co., Ltd., said: "Because the circuit in the dishwasher product may have a capacitor, the capacitor is an energy storage device, it may discharge between the pins of the plug. Consumers who touch a plug that has just been unplugged may pose a risk of electric shock. Light will be startled by the pain of electric shocks, heavy will be serious risk of skin burns caused by electric shocks. ”
According to the inspectors, the so-called capacitor is a component that can store charge, it is also one of the most commonly used electronic components of home appliances, and the power stored in the capacitor may also be discharged externally through the metal insert on the power supply cord plug. Therefore, in order to protect the personal safety of consumers, the national standard clearly stipulates in the structural project that the residual voltage between any two plugs of the plug shall not exceed 34 volts.
However, the reporter saw in the testing agency that this standard is called the sample produced by Ningbo Dezhao Kitchenware Co., Ltd., and during the test, the residual electric cup of the plug far exceeds the national standard limit.
Shi Lili, engineer of bath equipment engineering department of Weikai Detection Technology Co., Ltd.: We connected it to a voltage of 220 volts. When disconnected from the peak of the voltage, one second after the disconnection, the voltage between its inserts is 250 volts, which is greater than the standard limit of 34 volts, which does not meet the requirements of the standard.
Dishwasher sewage may be siphoned back into the water pipe
According to the inspector, the water supply pipe of the dishwasher is usually directly connected to the water pipe, in the process of use, once the tap water suddenly encounters water stoppage, the pressure in the water pipe becomes negative pressure, and the water in the dishwasher may enter the water pipe, causing pollution. In the process of this test, unqualified products in this regard were also found.
Shi Lili, engineer of the bath equipment engineering department of Weikai Detection Technology Co., Ltd., said: "Because the water in the dishwasher may contain oil stains, detergents, food residues, etc., if it is poured into the water pipe, it will cause tap water pollution and bring risks to drinking water hygiene." ”
In order to ensure the safety of drinking water, the national standard stipulates that the structure of the dishwasher product connected to the water source should be able to prevent the phenomenon of inverted siphon from causing non-drinking water to enter the water source. However, the reporter saw in the testing agency that during the experiment, the sample produced by this label, which was called Henan Hongyunlai Electrical Appliance Co., Ltd., did not meet this requirement.
Shi Lili, engineer of the bath equipment engineering department of Weikai Testing Technology Co., Ltd., said: "According to the provisions of the standard, we use a dry water pipe to connect the equipment with the dishwasher products, and then add the water to the dishwasher and add water to the critical water level. Separately power the inlet valve to simulate the failure of the inlet valve. Set the vacuum value of the equipment to 65 kPa, start the equipment, according to the requirements, the water enters the container, the water can not be sucked out, obviously this product is not qualified. ”