Heat pipes are commonly used components in home appliances. Most of them are randomly tested, and there are few certifications (there are certifications, such as the VDE certificate in the picture below). Heating tubes are used in many occasions, and the parameters of the whole machine are different; and there may be different connections in series or parallel inside. Sometimes heating tube suppliers have to supply multiple customers, and sometimes they want to be versatile and suitable for different Market, which brings difficulties to the identification of heating tubes.
How to identify the heating tube randomly tested?
Trademark or manufacturer's name: It can be marked or not. If you want to bid, it needs to be consistent with the specification;
Model: It can be marked or not. If you want to bid, it needs to be consistent with the CDF of the whole machine;
Heating pipe
Voltage frequency parameters: can be marked or not marked. If it is marked, it is recommended to mark 50/60Hz, anyway, the heating tube is not sensitive to frequency; rarely see the marked;
Power parameters: can be marked or not marked. It is best not to mark, because it is difficult to unify. For example, sometimes the whole machine will be marked with 1000W, and sometimes it will be marked with 900-1100W according to the needs, and it must be matched with the voltage. Both power and voltage indicators are the hardest hit areas.
Voltage parameters: can be marked or not marked. Voltage parameters are rather annoying, because the rated voltages of many products are set by the complete machine manufacturers, and the rated voltages are different for different markets. For example, products going to Europe may have 230V, 220-240V, 220-230V, 230-240V Wait. If you want to bid, I think you need to mark the voltage that the heating tube actually bears in the product. If the heating tube bears 220-240V like the whole machine, it is marked as 220-240V. If two heating tubes are connected in series and bear 220-240V, they are labeled 110-120V; if the voltage parameters are marked, they also need to be consistent with CDF;
One of the principles that need to be emphasized for the label is that if there is a label on the heating tube, the physical product, the specification and the labels or parameters on the CDF must be completely consistent. For many factories that are not very standardized, it is not surprising that they have to coordinate a lot of data to be consistent and frequent confusion. However, the specific electrical parameters and technical requirements must be clearly written in the specifications. The specific identification of the heating tube needs to be based on the actual situation. This article is only from the perspective of certification and is for reference only.