What is the difference between a temperature fuse and a temperature switch

Thermal fuses are irreversible, and after the temperature is exceeded, the fuse blows and cannot be recovered, which is usually used for protection.

The temperature switch is reversible, after reaching the preset temperature, the switch acts, and after the temperature drops, it returns to the original state, which is usually used for control.

The types of thermal fuses are: 1. Organic type thermal fuse: it is composed of movable contacts, meltable and elastic posture springs.

2. Porcelain tubular spike temperature fuse: This type of fuse is named because it is made of insulated porcelain tube. 3. Square shell type thermal fuse:

These fuses use a special resin that is wrapped around a fusible alloy wire, which is then connected to the fuse's current.

Thermal fuses can sense overheating caused by abnormal operation of electrical and electronic products, thereby cutting off the circuit to avoid fire. Commonly used in: hair dryer, electric iron, rice cooker, electric stove, transformer, motor, water dispenser, coffee pot, etc., the thermal fuse can not be used again after operation, only once at the fusing temperature.

The working principle of the organic type thermal fuse: before the thermal fuse leak excitation is activated, the current flows from the left lead to the movable contact, and through the metal case to the right lead. When the outside temperature reaches a predetermined temperature, the organics melt and the compression spring becomes loose.

That is, the spring expands and the movable contact is separated from the left lead. The circuit is opened and the current is cut off from the movable contact and the left lead.

The working principle of porcelain tubular thermal fuse: when the ambient temperature rises, the specific resin mixture begins to liquefy, and when the melting point is reached, with the help of the resin mixture (increasing the surface tension of the melted alloy), the molten alloy quickly shrinks into a ball with the two ends of the lead as the center under the action of surface tension, thereby cutting off the circuit. Working principle of square shell type thermal fuse:

When the temperature around the thermal fuse rises to its operating temperature, its fusible alloy melts and shrinks into a ball under the action of surface tension and the help of special resin, which is attached to the ends of the two pins. In this way, the circuit is cut off.

The fuses used in various circuits are very different from each other, and it is most reliable to replace the fuse with high and low voltage circuit breakers in strong electricity.

According to the requirements of the circuit can be set different and the corresponding protection level, the old knife switch with different diameters of lead wire or copper wire and aluminum sheet to make the fuse, of course, not as good as the excellent and reliable air switch.

Of course, there are glass tubes or ceramic tubes made of wires of different diameters connected to the fuse for quick-melting insurance, with corresponding specifications, such as MA level to tens of amperes, and the replacement principle of the specific fuse in the emergency situation cannot exceed the original capacity.

Thermal protector and thermal fuse are both folk names. There are two official names: thermostat:

Disconnect the circuit at the set temperature point, and after the temperature drops, the rock oak search circuit is turned on. The advantage is that it can be reset, but the disadvantage is that it is not ruled out of the cause of the abnormality and it is turned on, which is prone to uncontrolled ignition; Thermal fuse: The scientific name is thermal fuse (refer to GB9816, IEC60691, UL60191), which is a temperature fuse that is disconnected when the temperature reaches the set temperature point, and needs to be replaced with the same specification (same temperature, current, existing current, voltage and existing voltage) after rough troubleshooting.

Thermal fuses are over-thermally protected, so the first layer is easy to understand: something that heats up.

Rice cooker, iron, air conditioner, coffee maker, toaster, kettle, water heater, soy milk maker,。。 All have to be heated.

Motor protection, something that uses a motor. Because the motor will heat up during the rotation, (the motor will have a risk of stalling, and it will heat up.) It can also cause excessive current, but there are other ways to avoid this) This is like a blender.

Lighting protection (large stage lampstands, etc.) has a lot of heat, and this heating has nothing to do with excessive current (ancillary caused by the conversion of electrical energy to light energy).

It will not be used on TV, although a short circuit will also heat up, and a short circuit will cause excessive current in the first place, so a cheaper current fuse can solve the problem.

Some temperature-sensitive electrical appliances such as rice cookers, induction cookers, water heaters, and electric fans generally have temperature fuses on them, and some circuit boards will have temperature fuse resistors, such as the use of temperature fuse resistors on TV circuit boards.

First of all, it is not excluded that it is caused by excessive instantaneous current, you can try it in the replacement one, if it is okay, then it will be fine, if it is still burned out, then you have to take a multimeter to measure whether there is a short circuit! Specific home appliances are different from home appliances, but generally start with electricity first!

Copper wire can replace the fuse, but it is not safe, and you can also use the copper wire reasonably according to the power of your electrical appliances.

If the temperature insurance in the rice cooker is broken, you can change to a higher temperature insurance, or you can give it directly. Temperature insurance is generally of little use.

There is no way to replace, if the electrical appliance is on fire, the consequences can be imagined, the thermal fuse is to play this role, usually has no effect, the key time plays a big role.

If it's broken, find a manufacturer to replace it, don't replace it with anything, because I am a thermal fuse manufacturer, and I know that there is no harm in using a thermal fuse. Thank you.

The main function of a hot fuse is to protect the circuit. Once the temperature of the electrical equipment exceeds the rated temperature of the fuse itself, it will automatically melt and break, effectively preventing the danger caused by overheating. The following will introduce you to the types of hot fuses and their correct usage.

1。Organic thermal fuses, which are mainly composed of movable contacts, fusible and springs.

2。Porcelain tubular thermal fuse, mainly made of insulated porcelain tube.

A square-case-type thermal fuse that wraps a fusible alloy wire in resin and is then connected to the fuse current.

1。Thermal fuses must be used reasonably within the specified parameters and must comply with the specifications of the fuse type itself.

2。During the actual installation, in order to avoid transferring stress to the fuse, such as the letter fuse, be sure to pay attention to the displacement and vibration of other accessories.

3。Once the fuse is installed, ensure that the ambient temperature does not exceed its maximum operating temperature after the fuse is blown out.

4。If the humidity or liquid content of the internal equipment exceeds 95, it is best not to use a thermal tank fuse.

5。It is recommended to install two thermal fuses with different fuse temperatures at the same time to deal with various emergencies. Slag file.

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