The electric water heater thermostat is an important part of the electric water heater, which is mainly used to control the water temperature of the water heater.
First, the working principle
Electric water heater temperature controller usually adopts bimetal as temperature sensing element. A bimetallic sheet is made of two metal sheets with different thermal expansion coefficients. When the water temperature changes, the bimetal sheet will bend and deform due to the temperature change.
When the water temperature rises to the set temperature, the bimetal sheet deforms to a certain extent, triggering the mechanical mechanism inside the thermostat to disconnect the contact, thus cutting off the power supply of the heating element and stopping heating. When the water temperature drops, the bimetal sheet gradually returns to its original state, and the contact will be closed at a certain temperature, re-connecting the power supply of the heating element, and heating begins. This continuous cycle keeps the water temperature of the water heater within the set temperature range.
Ii. Types
Mechanical temperature controller:
Simple structure, low cost. The temperature is set by turning the knob, and there are usually several fixed temperature gears to choose from.
The reliability is high, but the temperature control precision is relatively low.
Electronic temperature controller:
Electronic components and sensors are used to detect the water temperature and precise temperature control is achieved through a microprocessor.
It can achieve more accurate temperature setting and display, and some also have timing, reservation and other functions.
The price is relatively high, but the function is more powerful.
Three, the role
Temperature control: Ensure that the water temperature of the water heater is always maintained within the range set by the user to meet the different needs of use.
Safety protection: When the water temperature is too high or fails, the thermostat will automatically cut off the power supply to prevent the water heater from overheating damage or safety accidents.
4. Precautions
Correct installation: When installing the thermostat, ensure that the temperature sensor is in close contact with the water heater liner to accurately sense the water temperature. At the same time, wiring should be correct in accordance with the instructions to ensure the normal operation of the thermostat.
Regular inspection: Check the working status of the thermostat regularly. If the temperature control is found to be inaccurate or faulty, it should be repaired or replaced in time.
Avoid collision: During use, avoid collision with the thermostat so as not to damage the internal components.
Cleaning and maintenance: Keep the surface of the thermostat clean to avoid dust and dirt affecting its heat dissipation and normal operation.
In short, the electric water heater thermostat plays a vital role in the normal operation and safe use of the electric water heater. When choosing and using an electric water heater, users should pay attention to the performance and quality of the thermostat to ensure the use effect and safety of the water heater.
