Today, let’s talk about the steam oven heating tube, which is the most directly related to the steam oven. After all, the main function of the steam oven is to steam and bake, and to judge how good or bad a steam oven is, the key still depends on the performance of the heating tube.
First of all, what is a oven heating tube?
The oven heating tube is a seamless metal tube (carbon steel tube, titanium tube, stainless steel tube, copper tube) into the electric heating wire, the gap part is filled with good thermal conductivity and insulation of MgO powder after the tube is condensed, and then processed into various shapes required by users.
The stove heating tube has the characteristics of fast thermal response, high temperature control precision and high comprehensive thermal efficiency. High heating temperature means that the heater design maximum task temperature can reach 850℃. Medium outlet temperature average, high temperature control precision.
What about the heating tube of the steam oven?
Generally speaking, the steam oven has three sets of heating tubes, which are upper and lower plus the back heating tube, and the full range of food baking is carried out by the fan on the back.
Heater material
The heating tube of the steam oven is mainly made of stainless steel and quartz tube.
Quartz heating tube is a special process of opalescent quartz glass tube, with resistance material as a heater, because opalescent quartz glass can absorb almost all of the visible light and near-infrared light from the heating wire radiation, and can convert it into far infrared radiation.
Advantages: fast heating, good thermal stability
Disadvantages: easy to be brittle, not easy to reprocess, not accurate temperature control,
This type of heating tube is mainly suitable for relatively small ovens.
Now the mainstream steam oven heating tube material on the market is stainless steel. Mainly 301s stainless steel and 840 stainless steel.
The stainless steel heating tube is used to heat the fluid by forced convection.
Advantages: corrosion resistance, not easy to rust, good heat resistance, safety, strong plasticity
The difference between the quality of stainless steel electric heating pipe material is mainly the difference in nickel content. Nickel is an excellent corrosion resistant material, and the corrosion resistance and process properties of stainless steel can be improved after the combination of chromium in stainless steel. The nickel content of 310S and 840 stainless steel pipes reaches 20%, which is an excellent material with strong acid and alkali resistance and high temperature resistance in heating pipes.
In fact, 301s stainless steel is more suitable for steaming oven than 840 stainless steel, corrosion resistance is stronger, and there is no need to worry about steam rust and perforation rust for a long time in water, which is the most suitable baking tube for steaming oven.
Some businesses use 840 stainless steel, and then use the banner of “medical grade” and “professional oven tube” to fool consumers. Indeed, 840 stainless steel is used for professional ovens, but the oven is not equal to the steam oven, can not be secretly changed concept, said here the steam oven with 840 stainless steel heating tube is easy to be corroded by steam.
Heater position
The position of the oven heating tube is mainly divided into hidden heating tube and exposed heating tube.
The hidden heating tube can make the inner cavity of the oven more beautiful and reduce the risk of corrosion of the heating tube. However, because the heating tube is hidden under the stainless steel chassis, and the stainless steel chassis can not withstand too high a temperature, resulting in the upper limit of the direct heating temperature at the bottom of the baking time between 150-160 degrees, so there is often a situation that the food is not cooked. And the heating should be carried out through the chassis, the stainless steel chassis needs to be heated first, and the food is heated again, so the time is not exposed.
The exposed heating tube is that the heating tube is directly exposed to the bottom of the inner cavity, although it looks a little unattractive. However, there is no need to pass through any medium, the heating tube directly heats the food, and the cooking efficiency is higher. You may be worried that it is not easy to clean the inner cavity of the steam oven, but the heating tube can be folded up and can be easily cleaned
After introducing so much, do not fall into the pit again ~ When purchasing the steam oven, you should also distinguish the heat pipe, after all, it plays an important role in the cooking effect of the steam oven.
Post time: Jul-13-2024