Electric heaters have a thermostat, many people do not understand this, here we look at the notes on the thermostat, what is the principle of bimetallic temperature control.
First, the principle of the thermostat
1. When the temperature of the object to be controlled changes in the temperature-sensitive part of the thermostat so that the mass of the corresponding thermal expansion and contraction of the physical phenomenon of the mass (mass volume changes), and the temperature-sensitive part of the membrane box connected together to produce expansion or contraction.
Use: Mainly used in the home appliance industry (showers, drum-type washing machines, heaters), electric equipment (stainless steel automatic water boiler, embedded electric oven, electric fryer, food machinery, medical equipment), refrigeration industry (kitchen freezers, preservation of fresh cabinets, cold storage, ice machines, fish ponds, cold drinks machines, heating machines) and other temperature control with.
2. Technical three numbers:
1, electrical performance: 16 (3) A-250V ~ 10 (1.8) A-400V
2, the disconnecting temperature: according to the user's requirements, the temperature design range (-35 ° C ~ +320 ° C)
3, the product life: & gt; 100,000 times
4, Electrical Strength: AC2000V/1min
5, Normal Insulation Resistance: ≥ 100MΩ
Second, the attention of the thermostat
1, the user must be based on the characteristics of their own products, the temperature required to control, the ordering model and specifications.
2, thermostat installation, the temperature sensing tube as much as possible the whole branch close to the surface of the temperature control, in order to achieve the purpose of accurate temperature control.
3, the installation of the temperature sensing tube can not be deformed, so as not to affect its performance.
4, do not make the conductive gas or conductive material into the thermostat or contaminate the surface of the thermostat so as not to affect the electrical insulation properties.
5, mounting bracket M4 machine wire should not be too long, otherwise it will destroy the performance of the thermostat.
6, the switch box is electrical ceramic parts to be held lightly to avoid damage.
7, capillary bending radius can not be less than 5mm.
Third, the principle of bimetallic temperature control
The temperature switch is based on the temperature of the object to be controlled to determine the on/off switch; according to the principle of action is divided into: bimetallic, pressure and thermal ferrite type. About bimetal temperature switch: all kinds of metal have the characteristics of thermal expansion and contraction, and different metals with the temperature change of the coefficient of expansion is not the same,
bimetal temperature switch is based on this principle to work, bimetal by the upper layer of "high manganese alloy§ and the lower layer of "Yin steel§ composition. The expansion coefficient of the former is dozens of times the latter, respectively, known as the "active layer§ and" passive layer§, at normal temperatures under the copper sheet and the spring sheet contacts A and B contacts are connected to contact, the entire circuit in the on state. When the temperature rises, the active layer expansion than the passive layer, bimetal downward bending, the temperature rises to a certain level, the circuit is broken. Cooling to a certain extent bimetal recovery, the circuit is on.The above is the introduction of this article, I believe that after you have read it also have a simple understanding of this, if necessary, you can also continue to focus on one home network, to learn more information.