366 batches
There are 53 batches failed
This time, 366 batches of gas appliances (household gas rapid water heaters, household gas cookers) produced by 275 companies in 7 cities (regions) including Guangzhou, Shenzhen, Foshan, Dongguan, Zhongshan, Jiangmen and Shunde were inspected. Batches, undisclosed product discovery rate was 14.5%.
This inspection has verified the power supply operation safety, control devices and safety devices for domestic gas rapid water heaters, as well as the types, signs, and packaging of fuels for a total of 54 projects.
The unqualified items include the use of gas types, signs, packaging, manuals, use functions, airtightness, thermal load deviation, dry flue gas carbon monoxide concentration, temperature rise, flameout protection devices, thermal efficiency, hot water yield, electrical performance projects .
Choose stove 6 attention
The Provincial Bureau of Quality Supervision reminded consumers that when purchasing gas appliances, it is necessary to pay attention to the purchase of gas sources, structure, and product quality, and to replace them before the use of household gas appliances expires.
1. Each gas appliance corresponds to a gas source. The gas appliance must be used in the same way as the gas source it is used for. The use of an incorrect gas source can cause the combustion of the gas appliance to deteriorate and it may not even work.
2. According to home requirements, according to the installation method to determine the need to purchase the structure of gas appliances, such as gas stoves have embedded and desktop stove points, but also consider the size of heating power to meet the requirements.
3. When purchasing an embedded stove, be sure to check whether the flameout protection device is installed. Do not buy the flameout protection device. Do not buy the stove because the stove of the embedded stove is installed in a sealed kitchen cabinet. Once an accident occurs, it will turn off. Gas leaks cause the gas to accumulate in the mounting cabinet. When the leaked gas reaches a certain concentration, it can easily cause deflagration and ignition. At the same time, it is also necessary to check whether the function of the flameout protection device of the embedded stove is normal.
4. Priority should be given to the selection of products of well-known enterprises with large scale, good product quality and good service quality. Due to advanced equipment, complete detection means, and high management level, large companies have stable product quality, reliable performance, and excellent after-sales service.
5. Gas appliances purchased should carefully check the completeness of accessories such as packing boxes, nameplates and manuals; then check the surface quality, processing technology and cooperation, etc.; more importantly, check whether the airtightness of the gas appliances purchased is good , If possible, check if the combustion has any abnormalities such as tempering, yellow flame, and detached flame.
6. The service life of household gas appliances under normal conditions of use is generally 8 years, and should be replaced promptly after expiration.
Advantages of EPON:
EPON adopts a point-to-multipoint structure and passive optical fiber transmission mode to provide multiple services on Ethernet. EPON technology integrates low-cost, high-bandwidth Ethernet equipment and low-cost optical fiber network technology. Compared with other access technologies, it has unique advantages, which are mainly reflected in the following aspects.
Good compatibility: EPON uses Ethernet technology, which is by far the most successful and mature LAN technology, and it can be said to be the mainstream of user LAN technology. Because EPON is only based on the existing IEEE 802.3 protocol, and realizes the transmission of Ethernet frames in the user access network through minor modifications and additions, EPON is basically compatible with Ethernet technology. Using Ethernet as the access network has low cost and good versatility, avoids complicated transmission protocols and format conversion, high efficiency, and simple management.
Low construction and maintenance costs: The EPON system significantly reduces the number of optical fibers, optical transceiver modules, and central office equipment. As the cost of optoelectronic devices continues to decrease, EPON`s per-line equipment access cost is comparable to ADSL and CM, especially the current price of optical fiber is lower than that of cable. These conditions have become the basis for the development of FTTH. At the same time, the foundation of EPON is Ethernet, and related components and equipment of Ethernet are the lowest in price. Using EPON as the access network has low cost and good versatility, eliminating the need for IP data transmission protocol and format conversion. High efficiency and simple management. In addition, there are only passive optical components such as optical fiber and optical splitter between the central office (OLT) and the user (ONU). There is no need to rent a computer room, no power supply, and no active equipment maintenance personnel. Therefore, it can effectively save operation and maintenance. cost.
High bandwidth: EPON can currently provide a downlink transmission rate of 1. 25 Gb/s, a single-wavelength uplink rate of 125 Mb/s, and can be upgraded to 1 GB/s with the development of Ethernet technology. This is much higher than the current access methods, which can meet the bandwidth requirements of various services such as broadband Internet access, video on demand, online games, video phones, and digital high-definition televisions, and fully meet the bandwidth requirements of access network customers. And it can easily and flexibly allocate bandwidth dynamically according to changes in user requirements, which can be used as the user's ultimate access method.
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Shenzhen GL-COM Technology CO.,LTD. , https://www.szglcom.com