- Q & A -
frequently asked questions
What are the precautions for the air duct heater?
1. Although the electric heater is equipped with a thermal protector, which can automatically cut off the power supply, it can only be used when there is wind in the air duct, so it is necessary to avoid the unexpected situation of the heater. Before heating, all relevant components shall be checked to ensure normal operation of the fan before putting the electric heater into use, thus eliminating the possibility of ultra-high temperature of dry burning without wind. It is recommended to control the heater jointly with the fan.
2. The power supply voltage and the electric heater voltage must be equal, and the main power supply of the electric heater shall be provided separately. The electric heater must be connected to the control circuit correctly before it can be put into use.
3. Although the electric heater has a variety of protection devices, all the terminals shall be checked before use to see if they are firm. Grounding measures shall be taken to ensure safety.
4. The air inlet end of the electric heater shall be equipped with a filter screen, and the filter screen shall be cleaned regularly to avoid all kinds of foreign matters entering and damaging the electric heating pipe or affecting the service life and heat dissipation performance of the heating pipe.
How to maintain the air duct heater?
1. The air duct heater, especially the control part, is a precision instrument, which should be handled with care during transportation. It is strictly prohibited to impact or hit.
2. The cylinder part shall be properly hoisted to avoid deformation and damage of internal heating elements. The air duct heater and control cabinet shall be placed in the warehouse, and it is strictly prohibited to get wet.
How to calculate the power of pipeline heater?
The power calculation of pipeline heater is applicable to the power calculation of all fluid heaters. First of all, we need to know the media, flow (or total mass), temperature rise parameters, which can be obtained through communication with customers.
The calculation formula is: w = cm △ T / 863
C: Specific heat of medium (kcal / kg ℃) m is the mass of medium (kg); △ t is the temperature rise (degree)
Give an example:
1. If the heating medium of the customer is water, the flow rate is 2 cubic meters per hour, and the temperature is from 20 ℃ to 80 ℃. The specific heat of water is 1kcal / kg ℃
2. If the heating medium of the customer is water and the total weight is 2 cubic meters, heat the water temperature from 20 ℃ to 80 ℃ in one hour. So their power is the same, which means they heat two cubic meters of water in one hour. Still water can be heated to a specified temperature for a specified period of time. Like two hours. So the power is only half of the original. If it's half an hour, it's twice the original power.
The above example shows the power calculation of water flowing in the pipeline and still water (such as water tank). For the calculation of heater power of other media, as long as the specific heat of the media and the parameters of power calculation mentioned above, we can calculate the power required by the heater. Of course, we should consider margin in practical application. Appropriate coefficient can be put, such as power * 1.2.
Where can pipe heaters be used? What is the maximum heating temperature?
The pipe heater can be used in almost any situation. Its main function is to prevent freezing, condensation and other aspects of heating. It is not only dedicated to industry, such as outdoor water, steam pipeline, oil pipeline, but also for household products, such as electric faucet. It is a kind of through heating device with wide application. Due to different technical and technological requirements, industrial heaters need different temperatures, probably between tens and hundreds of degrees Celsius. For domestic heaters, the temperature range is relatively centralized, and the maximum temperature is basically below 60 degrees Celsius, which is too high to cause burns.