Internal structure of cartridge heater with thermocouple

In the cartridge heater, a cartridge heater with a thermocouple is bred in the hope of detecting the temperature at certain points. Carridge heater with a thermocouple is used to detect temperature by adding a K or J thermocouple into it, but the position of the thermocouple is different, so the temperature position of the thermocouple is different.

1. bottom grounding type

The thermocouple is placed at the bottom of the tube and communicated with the shell of the electric heating tube. Because the temperature measuring node at the bottom can be in close contact with the mold, the temperature sensing speed is fast, and the process structure is suitable for all sizes of electric heat pipe.

2. pipe bottom non grounding type
The temperature sensing speed is slower than the contact structure at the bottom of the tube, and is often used as reference temperature.

3. tube intermediate grounding type
It is suitable for measuring the inner temperature of an electric heating pipe with a length of more than 80 mm, and plays an over-temperature monitoring role.

4. tube intermediate non grounding type

It is suitable for measuring the temperature of the inner wall of the shell of the electric heat pipe, which is longer than 80 mm. It is widely used as a reference for the temperature of the shell of the electric heat pipe.

immersion water heater

immersion water heater (flanged heater) as the name implies is the electric heater immersed in the liquid for heating, the main characteristics of the electric heater immersed in the liquid, the energy emitted by the electric heater are absorbed by the liquid heater, so energy efficiency is very high, coupled with small size, easy to control and other advantages, is widely used in petroleum. Chemical and metallurgical fields.

The company provides customized design and manufacturing of immersion water heater (flanged heater). Users can specify the shape, parameters, material and other requirements of the use of scenarios. Our company will customize more suitable heating products according to customer needs.

ds18b20 temperature sensor pack up for shipment to customers.

I always feel happy at work, though the weather in Shenzhen is not very good today.

One hundred DS18B20 temperature sensor pack up for shipment to customers.

We are Shenzhen Vsec Electronics Co., Ltd. We specialize in DS18B20 temperature sensor and other temperature sensors, including various resistors, power, wire and size.

If you have any need, you can contact us anytime.

how does a silicone heater work

The silicone heate plate is generally divided into two kinds, 220V and 380V, and the current is 1.5A. silicone heater sheet (SCS), that is, silicone rubber heater sheet (heating sheet), also known as silicone rubber heater gasket / electric heating film / electric hot strip /electric heating sheet, oil drum heater / heating belt / heating plate and so on, are called different. It is made up of two glass fiber cloth and silicon rubber glass fiber cloth made of double chip silicon bonding. Because it is a thin sheet product (the normal thickness is 1.5mm), it has good flexibility and can be completely in close contact with the heated object. It is flexible, easy to get close to the heater, and the shape can be changed to design heating, so that the heat can be transferred to any desired place.

Vsec Elec. - Silicone heater

Silicone heater delivery of our company

Silicone heater delivery of our company

How to design die cartridge heater?

When heating metal modules, plastic molds, or hot runners with a high-power mold cartridge heater, we usually insert it into a machined hole. However, the outer diameter of the cartridge heater and the clearance between the mounting holes have a direct impact on the service life of the cartridge heater. The gap is too big, the mold cartridge heater cooling effect is poor, the life is short; the gap is too small, the mold cartridge heater replacement is very difficult, encounter such a problem, what should wedo?

These lection of mounting hole size of cartridge heater is closely related to the heat density of heater. The temperature produced by different heat densities is different, and the expansion degree of casing is also different. Therefore, it is necessary to combine the relationship between the two to make a suitable mounting hole size.

Firstly, we determine the operating temperature of the heated object. Secondly, we select the heater suitable for size and power, and calculate its thermal density.

Thirdly, combined with the heat density and the temperature curve, we find the corresponding gap parameters.

Finally, according to the data found, choose the intermediate value to determine the final data.

(Example)Choose a 10 mm diameter mold cartridge heater, the size of the heater is 9.93 + 0.03 mm, we choose 10 m + 0.02 mm installation aperture, mold temperature 300 degrees, the maximum heat density of the electric heat pipe? What is the maximum power of an electric heating tube with a length of 200mm?

(1)By calculating the known data, we can get that the maximum gap between the installation hole and the electric heat pipe is 10.02-9.90=0.12mm. From the data point of view, the maximum heat density of the corresponding heater is 25W/cm2.

(2)According to the parameters mentioned above, the effective heating length of the 200 mm electric heat pipe can be calculated as 180 mm, and the maximum density is 25W/cm2. The maximum power can be obtained by the following formula: electric heat pipe power = thermal density *heating length * electric heat pipe diameter * 3.1416 = 25 * 18 * 3.1416= 1413W.

Points for attention in design of die cartridge heater

For the mold cartridge heater, the most important thing is to ensure that the heat generated by the heating rod can be transferred to the heating medium in time, reducing the temperature of the material inside the heating rod, so as to effectively improve the service life of the mold cartridge heater.

(1)The gap between the outer diameter of cartridge heater and its insertion aperture should be reduced as far as possible. Usually the gap between them is less than 0.1 mm. For example, the heating rod with 10diameter should be the aperture with 10.1 diameter.

(2)When machining mounting holes, the coaxiality and tolerance should be effectively guaranteed, such as using reamers and other tools to dress the machining.

(3)The mold cartridge heater should be installed before cleaning the residue left in the processing, such as organic oil and other residues, after heating will be carbonized, thus affecting the ability of heat conduction.

(4)There will be no problem in the use of the design voltage, the actual power can be calculated according to the following formula:

[use voltage / design voltage] * [use voltage / design voltage] * design power = power used.

An electric heat pipe with a rated voltage and power of 230V 500W and a voltage of 220V has a power of 418.6W, about 84% of the rated power.

 cartridge heater design

how to check a cartridge heater？

Carridge heater is simply a kind of conductive heating elements in electrical appliances, is an important member of the category of electric heating elements. Moreover, most electrical appliances need to use cartridge heaters, and they can't work properly without a cartridge heater. So cartridge heater is an indispensable part of the electric heating element.

Cartridge heater generally we can judge their professionalism and reliability through their manufacturability. The quality of electrical products is the most interesting issue. What are the differences in the quality of cartridge heaters made of different materials: cartridge heaters convert electrical energy into kinetic energy, which brings about the kinetic energy of machines. If the quality is not enough, then it will not lead to the normal work of the machine, thereby reducing efficiency.

Briefly speaking, what should be paid attention to when using cartridge heater: the voltage at work should not be greater than its rated voltage; the relative temperature of air should not be greater than 95%; the components of cartridge heater should be placed in a dry place; the cartridge heater should be positioned and fixed; the effective heating zone must be completely immersed in liquid or metal solids In the cartridge heater outlet end magnesium oxide powder, in the use of places to avoid contaminants and water infiltration, prevent accidents.