Temperature fuse, also known as thermal fuse, is a new type of electrical overheat protection element. This kind of element is usually installed in the electrical apparatus which is easy to generate heat. When the temperature exceeds the abnormal temperature, the temperature fuse will automatically fuse, cut off the power supply and prevent the electric appliance from causing fire. In recent years, most of the household electrical appliances with heating as the main function, such as electric rice cooker, electric charge bucket and electric stove, have been installed with temperature fuse, which can cut off the power supply in time in case of internal failure of the machine parts, prevent further damage to the electrical appliances, and put an end to the fire caused by this. Temperature fuse and we are familiar with the fuse, it is usually only used as a power path in the circuit, in use if it does not exceed its rated value, it will not fuse, no effect on the circuit. Only when the electric appliance breaks down and produces abnormal temperature, it will fuse and cut off the power supply circuit. This is different from fuse fuse, which is due to the heat generated when the circuit exceeds the rated current.
Temperature fuse has the characteristics of accurate fusing temperature, high voltage resistance, small size and low cost. The rated temperature value and rated current value are marked on the shell of the temperature fuse, so it is easy to identify and use. It can be widely used in electrical equipment, electric heating equipment and practical electrical appliances, etc. for overheat protection. Temperature fuse has the following parameters:
① Rated temperature: sometimes also known as operating temperature or fusing temperature. It refers to the temperature rising to the fusing temperature at the speed of 1 ℃ per minute without load.
② Fusing accuracy: refers to the difference between the actual fusing temperature and the rated temperature of the temperature fuse.
③ Rated current and rated voltage: the nominal current and voltage of general temperature fuse have certain margin, usually 5A and 250V.
The temperature fuse is a kind of one-time protective element. Its effect depends not only on the performance of the component itself, but also on how to select and install the temperature fuse correctly. When the temperature fuse is used, it is usually connected in series in the circuit. Therefore, when selecting the temperature fuse, its rated current value must be greater than the current used in the circuit. The current passing through the temperature fuse is not allowed to exceed the specified rated current value. Before selecting the rated temperature of the temperature fuse, it is necessary to know and measure the temperature difference between the temperature to be protected and the temperature at the position where the plant fuse is installed. In addition, the length of fusing time and ventilation are also closely related to the selection of rated temperature of temperature fuse.
In the national clean heating "coal to electricity" initiative, more and more families use electric heating, how to save energy has become a concern of many people. In addition to building insulation, temperature control is one of the key to energy saving. Some users who have installed electric heating always turn on the thermostat when they need it and turn it off when they go out, thinking that this will save electricity. In fact, it will not only save energy but also consume more energy. So how to use the thermostat to achieve real energy saving?
Misunderstanding 1. Instant energy saving?
Turn on the thermostat when necessary and turn it off when going out, which will consume energy. Electric heating system is a low temperature operation system. It has good heat storage property. It takes a certain time to make the room temperature reach the set temperature after the system is turned on, but the indoor temperature will not drop rapidly after the system is turned off. It also takes a long time for the temperature to rise again when it is opened again. Frequent switching not only can not save energy, but also increase the operating cost of heating system.
In a room that is not commonly used, the temperature can be lowered by a few degrees by the temperature controller. When leaving the room for a long time, the temperature of the temperature controller can be reduced by a few degrees. In the case of long-term absence of people or leaving for a long time, the system can be turned off. However, it should be noted that if there is equipment in the room that is afraid of freezing damage, it is also necessary to open it to a certain temperature to prevent the equipment or pipeline from freezing and cracking.
Mistake 2. The higher the set temperature of the thermostat, the faster the temperature rise?
Some users feel that the room temperature is low and they need to heat up quickly to set the temperature of the thermostat to the highest. This practice is also wrong.
The heating time of room temperature depends on the indoor and outdoor temperature difference and the installed power per unit area of the room. When the installation power and the indoor and outdoor temperature difference are fixed, no matter how many degrees are set, the time for the room to rise to the temperature you need is the same.
If the room is now 16 degrees and you want to make the room temperature rise to 18 degrees, in this case, setting the room temperature to 18 degrees or 20 degrees, 25 degrees is the same as heating to 18 degrees.
Set as many degrees as you need, or use an intelligent thermostat, which can automatically calculate the opening time of the thermostat in advance.
Temperature fuse, also known as thermal fuse, is a new type of electrical overheat protection element. This kind of element is usually installed in the electrical apparatus which is easy to generate heat. When the temperature exceeds the abnormal temperature, the temperature fuse will automatically fuse, cut off the power supply and prevent the electric appliance from causing fire.
Although the fuse is also a kind of metal wire, it is different from ordinary copper wire and iron wire. It is soft and is made of lead, antimony or low melting point alloys such as lead and tin. It has high resistivity, low melting point and is naturally afraid of heat. Due to the thermal effect of the current, as long as the current passing through the fuse exceeds the rated current of the fuse and reaches the fusing current, the fuse will fuse rapidly and automatically disconnect the circuit and power supply. In this way, the strong current can no longer enter the user's home, so as to prevent the instruments, appliances or wires connected in the circuit from burning out due to the strong current. The fuse is broken and can't be replaced by copper wire or iron wire. If the fuse is replaced by copper wire or iron wire, because of their high melting point, even if the strong current passes through, it will not melt, so it can not cut off the current automatically and can not play a role of safety. It is very dangerous. In addition, when installing the fuse, you must pay attention to choose the appropriate thickness. There are many specifications of fuse, usually expressed by its rated current. For the fuse of the same material, the larger the section diameter, the larger the allowable rated current. Therefore, the total current through the circuit must be slightly greater than the rated current of the circuit. In this way, not only can the fuse work normally, but also can ensure that the fuse can quickly fuse and cut off the circuit when encountering excessive current. If the rated current of the fuse is too large, it will not fuse when there is too strong current passing through the circuit, and it will not play the role of insurance, which is no different from connecting steel wire and iron wire; if the rated current is too small, then in the normal power consumption, the fuse will also blow, causing power failure.
1、 There are various installation methods
1. In the panel of some electrical equipment, we can see the fuse holder product, such as speaker, massage chair and other electrical equipment. This product is often installed in some small household appliances and some industrial machinery, and it is often installed through some leads.
2. Using PCB products and some fuse clips, using this device in these household appliances can ensure the safety of these appliances in the process of use, and avoid the occurrence of short circuit or excessive total power and other accidents.
3. This product is often used in the car, and the way to use it is similar to several ways installed on small household appliances, which can ensure the safety of the car in the process of driving
2、 Choose the right one for installation
When fuse is used in different equipment, the type of fuse required is also different, which makes people choose different types of fuse holder. Now there are many types of products on the market. Different types of products can be selected according to the size of the fuse, and different types of products can be selected according to the material. At present, the products are also divided into environmental protection type and non environmental protection type. Therefore, people in the choice of this product, must choose the appropriate model, in order to ensure that the fuse can be better installed, and to ensure that the fuse has a good use effect.
Fuse holder is now widely used in life, in the purchase must be based on the specific situation, choose the appropriate product type, so as to ensure better use.