The change of hot water temperature can be controlled by the temperature sensor. If the temperature rises, the methane chloride or Freon 12 temperature sensing agent gas filled in the temperature sensing package will expand with the temperature rise, diffuse to the expansion capsule, push the lever, disconnect the microswitch contact, cut off the power supply of the heater, and gradually cool the water temperature; When the water temperature drops to a certain value, the temperature sensing agent gas in the temperature sensing package and expansion capsule shrinks, the lever returns to its original position, the microswitch is closed again, the heater power is connected, and the heater starts to work. This repeated action can achieve the goal of constant temperature.
Instant type Intelligent thermostatic water heater It is heated and unheated through the on-off of the temperature controller. The common concept of heat preservation is short time heating. When heating, the rated power of the water heater is still used. After the circuit is connected, if the water temperature is lower than 50 ℃ (the critical temperature set by most brands), the thermostat will automatically connect and the water heater will start heating. When the water temperature reaches the preset temperature of the water heater (75 ℃~85 ℃ for most brands), the thermostat will disconnect and the water heater will stop heating.
The so-called thermal insulation is completely completed by the thermal insulation layer of the water heater. As the water temperature drops from time to time until it is below 50 ℃, the water heater starts heating again. This cycle completes the so-called heat preservation. When the heat preservation lamp is used, the water heater does not consume electricity, which is close to the theoretical zero power and zero power consumption. When heating, the water heater uses the rated power. To understand the uniform power consumption of water heater during heat preservation, look at the national specifications. The approximate value is that even without a drop of hot water, the power consumption of the water heater for "insulation" is about 2 degrees Celsius/24 hours.
With the progress of science and technology, many water heaters begin to have constant temperature function Electric water heater How is the temperature controlled? It is known that electronic temperature controller, bimetallic temperature controller and capillary temperature controller are commonly used in water storage electric water heater. Next, Zhongshan Wanmite Electric Appliance Co., Ltd. will introduce the working principle of the bimetallic chip temperature controller and capillary temperature controller of the instant intelligent thermostatic water heater in detail.
1. Capillary temperature controller. The temperature sensor of the capillary type temperature controller is made of a steel tube with a diameter of 3-6mm, and is connected to the expansion capsule by the capillary and the lever. One end of the lever is fixed, and the other end is in contact with the microswitch.
2. Bimetal chip temperature controller. The bimetallic sheet in the temperature controller is composed of two metal materials with different thermal expansion coefficients. It can be used as both a temperature sensing probe and an executor of actions. The bimetallic strip will bend with the increase of temperature, which will destroy the balance of the bow spring in the action strip, the contact will quickly jump off, cut off the circuit, and the heater will stop working; When the temperature decreases, the bending of the bimetallic sheet becomes smaller. Under the balanced elastic force of the bow spring, the contacts quickly connect, close the circuit, and the heater continues to work.
