Basic knowledge about PTC ceramic heating element


Release time:

2022-05-31

The ceramic heating element is a high-energy heater with uniform heat distribution, and a metal alloy with excellent thermal conductivity to ensure uniform hot surface temperature and eliminate cold hot spots of the equipment. There are two types of ceramic heaters, namely PTC ceramic heaters and MCH ceramic heaters. The materials used in these two products are completely different, but the finished products are similar to ceramics, so they are collectively referred to as 'ceramic heating elements '.

The PTC ceramic heating element is composed of PTC ceramic heating element and aluminum tube. It is composed of galvanized outer pressure plate, stainless steel corrugated spring sheet, galvanized inner pressure plate, single-layer aluminum radiator, ptc heating plate, double-layer aluminum radiator, nickel-plated copper electrode The terminal and pps high temperature plastic electrode sheath are composed. Due to the use of U-shaped corrugated fins, the product improves the heat dissipation rate, combines the advantages of bonding and machinery, and fully considers various thermal and electrical phenomena during the operation of ptc heating elements. PTC ceramic heating element has strong binding force, excellent thermal conductivity and heat dissipation performance, high efficiency, safety and reliability. This PTC heater has the advantages of low thermal resistance and high heat exchange efficiency, and is an electric heater with automatic constant temperature and power saving. One of its outstanding features is its safety performance, that is, when the fan fails to stop running, the power of the PTC heater will automatically drop sharply due to insufficient heat dissipation. At this time, the surface temperature of the heater will be maintained at about the Curie temperature (generally about 250 °), thus avoiding the "red" phenomenon on the surface of the electric heating tube.

The advantages of PTC ceramic heating element: 1. PTC thermal ceramic heating element has the special functions of constant temperature, temperature regulation and self-control. When an AC or DC voltage is applied to the PTC element, its resistivity is very low and the temperature rises rapidly below the Curie point. Once the Curie point is exceeded, the resistivity suddenly becomes larger, so that the current drops to a stable value, and the purpose of automatic temperature control and constant temperature is achieved. No additional temperature control circuit device is required, and the PTC element can be adjusted by formula according to different temperature requirements. 2, non-burning, safe and reliable. PTC element is not red when heated, unknown fire (resistance wire is red, there is open fire), not easy to burn. When the temperature around the PTC element exceeds the limit, its power will automatically drop to the equilibrium value without causing a combustion hazard. 3. Longevity. The PTC element itself is an oxide ceramic with long service life, no disadvantages of high-temperature oxidation of nickel-chromium wire, and no fragile phenomena such as glass quartz tubes.

The PTC ceramic heating element can be used normally under low pressure and high pressure. The low-voltage PTC element is suitable for various low-pressure heaters, instrument low temperature compensation, and various automotive heaters. PTC element is suitable for heating the following electrical equipment: dry shoe machine, hot melt glue gun, rice cooker, electric boots, electric mosquito repellent, steam comb, steam generator, humidifier, curling iron, vending machine, air curtain machine, hand warmer, dry tea machine, beauty salon, baby bottle thermostat, heater, etc.