On October 31, at the October regular press conference held by the General Administration of Quality Supervision, Inspection and Quarantine, Hu Yu, deputy director of the National Gas Appliance Quality Supervision and Inspection Center, combined with the national inspection results of the national gas stove product quality in 2013, the domestic gas stove The hazards caused by the unqualified test items of the products, as well as the purchase and use points, were accepted by reporters.

According to reports, household gas stove products belong to the first batch of products that implement the "Product Quality Supervision and Inspection Implementation Regulations" (hereinafter referred to as "Implementation Specifications"), and their test items include air tightness, heat load deviation, main fire measurement and conversion heat load, 17 projects such as carbon monoxide concentration and thermal efficiency in dry flue gas, these items are mandatory in the national standard GB 16410-2007 "Household Gas Cooker".

Hu Yu said that the "Implementation Code" is divided into two categories according to the degree of importance, A is said to be extremely important, and B is important. If the product has a Class A project that is unqualified, it is seriously unqualified. If the product has a Class B project, it is generally unqualified. Class A projects are indicators directly related to personal and property safety, including 10 items such as air tightness and carbon monoxide concentration; Class B projects are technical performance parameters of product work, including 7 items such as heat load and thermal efficiency.

In 2013, the results of the national supervision of household gas stove product quality showed that the airtightness, the temperature rise of the part that the hand must touch during operation, the structural requirements of the flameout protection device, and the valve closing time of the flameout protection device were unqualified. Hu Yu said: "In combination with the previous supervision and spot checks, we found that the main unqualified items of household gas stoves include: air tightness, heat load deviation, carbon monoxide concentration in dry flue gas, thermal efficiency, flameout protection device requirements, and operation must be Projects such as temperature rise and gas pipelines in contact should attract extensive attention."

“Unqualified items in the inspection may pose a serious threat to the safety of the user's life and property.” Hu Yu said: “For example, air tightness is the most important safety indicator for gas appliance products. If this item fails. There will be gas leakage, which will lead to vicious accidents such as poisoning, fire and explosion. The main cause of such problems is the poor quality of gas pipeline system parts and the low level of product assembly process." In addition, heat load, The concentration of carbon monoxide in the dry flue gas, the thermal efficiency, the flameout protection device, the temperature rise of the part that the hand must touch during operation, and the pass or fail of the gas pipe are also important indicators for measuring the quality of the gas stove.

Hu Yu pointed out that the heat load is an important indicator for the release of heat in gas appliances. The unqualified heat load deviation found in the spot check is mostly negative deviation, which is typical of small charge and large, unable to meet the user's needs, gas nozzle processing Poor precision and deliberate deception of consumers are the main reasons for the failure of heat load project detection; the concentration of carbon monoxide in dry flue gas is also an important indicator to determine the combustion conditions of products. Gas combustion will produce a certain concentration of harmful gases of carbon monoxide, which is absorbed by the human body. Excessive carbon monoxide can cause coma or even death. Therefore, the carbon monoxide emission concentration of the product is strictly limited; the thermal efficiency is an indicator reflecting the high and low utilization rate of the product, and is also an indicator for each enterprise to compete for improvement. The product with unsatisfactory thermal efficiency will be due to the structure of the product combustion system and the pot support component. The design is unreasonable and wastes.

Consumers may unexpectedly turn off the fire when using gas stoves daily. If the flameout protection device fails, gas leakage may occur, causing a fire, explosion or poisoning. "The flameout protection device refers to the device that can automatically shut off the gas passage when the flame is unexpectedly turned off. The national standard requires that the flameout protection device be installed, and the closing time is not more than 60 seconds. At present, the general closing time of domestic gas stoves in China is more than ten seconds. Hu Yu told the reporter that the temperature of the part that the hand must touch should be paid attention to during the operation. If the item is unqualified, the consumer is easily burned and the knob is easily damaged. In addition, the gas pipeline is prone to air leakage, and many gas accidents occurred in the past are caused by air leakage at the connection between the air inlet connector and the gas hose. “Overall, these unqualified projects have a certain connection with the use of inferior materials and cut corners.”

In the face of the huge use of household gas stoves in China, Hu Yu put forward some suggestions on the purchase, use and maintenance of products: in the purchase of products, we must first pay attention to the problem of gas source to ensure that the selected products are actually used by ourselves. The gas source is consistent, and there should be a clear gas source mark on the product packaging box. At the same time, you should choose desktop or embedded products in combination with the installation and your actual needs. You can also choose products with different eye counts such as monocular, binocular or multi-eye according to daily usage habits. From the panel material point of view, the advantages of each material are different: stainless steel panels have good durability, steel plate spray and tempered glass panels are easy to clean, and ceramic panels are rich in color and strength. It is worth noting that consumers should pay special attention to whether the stove has a flameout protection device when purchasing, and do not neglect safety because of the low price.

In the use and maintenance of gas stoves, Hu Yu suggested that you must carefully read the instructions before use, focusing on the safety precautions, especially pay attention to the use of the product air conditioning plate, so that the burning flame is clear and close to light blue The color state, which not only helps to reduce carbon monoxide emissions, but also improves thermal efficiency and reduces gas consumption.

Regular cleaning of the fire cover will keep the cooker in an optimal state of combustion, but it will be restored to the correct installation state after cleaning. Assembly errors can lead to danger. Hu Yu reminded consumers that they should regularly check whether the connection of the gas pipe joint is stable and regularly replace the hose used in connection with the cooker. In particular, it is necessary to note that the domestic gas stove product has a default period of 8 years. For products that are overdue, pay attention to safety and should be inspected or replaced by professionals. Reporter Wang Yuan

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