There are two types of common hand warmers: an electrode type with two metal rods; an electric wire type with a large coil or tube inside

When you buy a soft hand warmer, you can easily identify the type of hand warmer by touching it.

As the weather gets colder, various kinds of hand warmers on the market are beginning to become popular. In recent days, CCTV has specially produced a live service reminder program for the electrode-type hand warmers that people often use to explode wounds. A survey by the reporter found that electrode-type hand warmers in the Zhengzhou market are still selling. For dazzling hand warmers, how to identify and use?

event

The hand warmer explosion has been "again again and again"

Recently, Zhengzhou citizen Ms. He suddenly spent 30 yuan in the market to buy the Hand Po when it was suddenly exploded.

Ms. Ho said that the hand warmers she bought at first were hot and convenient. But convenience does not mean safety. Ms. Ho said that one night before yesterday, her hand warmer suddenly exploded when he was heating up, and the room was filled with a pungent smell. “Scared to death, fortunately there was no use at that time.” The explosion was not accidental. Ms. He purchased the hand warmer bags, except for the product name, but no information on the origin, manufacturer, and parameters. Moreover, Ms. He’s encounter is not an example.

In December 2012, a junior high school girl from a college in Nanjing thanked her with a serious scald because of a sudden explosion of the hand warmers.

In January 2012, Ms. Wang purchased a hand warmer that exploded on heating and scorched her home's electric plug. Fortunately, no one was injured.

In November 2011, when Ms. Li watched TV in Shandong, the warm hand pouch on her leg exploded and liquid splashed on her thighs, causing serious burns on the inside of her thighs.

Regulations

Electrode hand warmer is forbidden to sell

In recent years, with the frequent explosion of the hand warmer Baobao, the state has made detailed provisions on hand warmers.

As early as in 2009, the General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) was responsible for the weight bearing, temperature rise, power failure, and degree of sealing of Hand Warmers in the “Special Requirements for Safely Stored Electric Hand Warmers for Household and Similar Electrical Appliances”. Made specific provisions.

According to media reports, the operating principle of Hand Warmers is to heat the internal electrolyte through the heating element, and the heating element is divided into two types, the electrode type and the electric heating type. Electrode hand warmers are not allowed to meet the national standards, easy to leakage, there is a risk of bursting, production and sales are banned.

In this regard, relevant persons from Zhengzhou City Bureau of Industry and Commerce Railway Station said that they have already sampled the hand warmers sold on the market, and they will be sent for inspection. If they do not meet the national standards, they will be investigated.

"Businesses also do not know which products are compliant and which are not compliant." The source said that at present, they are also increasing publicity and guidance for merchants selling Hand Warmers.

Visits

Electrode hand warmers market hot

Yesterday afternoon, the reporter visited Zhengzhou Zhongzhou Shopping Mall, Wanbo Commodity Market, Zhongtian Mall Small Commodity Market and street retail stores, and found that the hand warmer sold on the market, in addition to color, flower shape, and size, the core is a charging jack The "little beggars".

In Fuzhou Street, the owner said that the warming hand warmers are all the same and do not have to look at the instructions. “You see which flower shape you like, whether it is big or small.” The reporter noted that the price of these hand warmers ranges from 10 yuan to 50 yuan.

The reporter randomly purchased a section, cut and found that there are two metal probes, and there is no test report on the packaging, the specific address of the manufacturer and other information.

Reporters found in Jingdong Mall, Taobao, Dangdang and other e-commerce platforms that the electrode-type hand warmers are still on sale. However, there is a hydropower separation heating hand warmer in the product description to remind: "There is a serious security risk."

Industry claims

The Wei boss, who represents many hand warmer brands in Zhengzhou, said that the products of these small factories have no test reports, and the regular products are about 10 yuan more expensive than the general ones. “The packaging looks good, and the skin can be removed and washed.”

Wei boss said that the current hand warmer temperature control technology has matured, "previously temperature control is 90 degrees Celsius, the temperature is high, and now are generally seventy to eighty degrees Celsius, as long as the temperature control settings are no problem, nothing."

He also stated that the hand warmers in the market are almost all "electrode type", and all of them are filled with a conductive solution. After the power is turned on, the metal probe can heat the solution.

doubt

1. Why is the electrode type dangerous?

According to Guo Guofu, a factory technician from Guangzhou Hand Warmer, there are two positive and negative electrodes in the electrode hand warmers. After energization, the solution is in a charged state and heating begins. Since the current is not constant, it is difficult to control the amount of heat generated. If the calorific value increases sharply, the liquid boils and the liquid pressure increases, causing the bag to expand and explode.

2. Why is the heating wire type safer ?

According to Guo’s introduction, when the electric wire type hand warmer is charged, the electric current heats the arc-shaped tube through the electric heating wire, and the heat of the arc-shaped tube is transmitted to the liquid in the bag. As long as the arc tube does not leak electricity, even if the hand warmer breaks, the exuded liquid will not be charged.

remind

How to choose and use correctly

1. When you buy an electric hand warmer, it is best to look at the outer packaging of the product and the related instructions. Some directly indicate whether it is an electrode type or an electric wire type, and some are not indicated. Do not purchase products that are not even the production site or the manual. ;

2. If it is a soft hand warmer, it is necessary to touch the heating element by hand. If there are two metal rods in the feeling, it can be basically determined as an electrode type hand warmer;

3. If you touch the bag with a large plastic coil or U-shaped, arc-shaped pipe, it is a hot wire warm hand Po.

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