Maintenance of rice cookers Before maintaining rice cookers, it is necessary to know the structure of various rice cookers in order to find problems. What is the structure of the direct-heating rice cooker? What is the structure of indirect heating rice cooker?
Direct-heating electric rice cooker structure
The direct-heating electric rice cooker is mainly composed of an inner pot, a shell, a pot cover, a heating plate, an automatic switch and a heat preservation device, and the bottom of the inner pot is completely in contact with the heating plate. After the heating plate is electrified and heated, the heat is directly transferred to the inner pot to save time and electricity.
Indirect heating type electric rice cooker structure
Indirect heating rice cooker is mainly composed of an inner pot, an outer pot, a rice container, a pot cover, a shell, a heating plate, an automatic switch and a heat preservation device. Compared with the direct-heating rice cooker, it has an outer pot. When in use, the water in the inner pot is heated to generate steam, and the steam spreads to the rice in the outer pot, and then the rice is steamed. The biggest feature is that it is evenly heated and will not burn, so many people will buy this pot to use.
But no matter what kind of pot you buy, you should pay more attention when using it to avoid frequent failures. Because once a fault occurs, it is necessary to find a professional to repair it at home, which is a waste of time and affects the cooking efficiency. Attention should also be paid to asking the cause of the failure during maintenance, otherwise it will be easy to be fooled.
How to repair the power supply when the light of the rice cooker goes out? The electric heating plate can still be heated, but the indicator light is not on, which is generally a problem with the indicator light or the circuit. You can open the bottom cover of the rice cooker to check it, find out the reason, and then carry out targeted maintenance. The following are the inspection and maintenance methods, quick marking:
1. Check the indicator light bulb for damage. If it is broken, replace it with a light bulb of the same specification, which is usually sold in hardware stores.
2. Check whether the current-limiting resistor connected in series with the indicator lamp is damaged, weld the resistance, and measure the current-limiting resistance with a multimeter. The normal value is 100 kiloohm. If it is damaged, replace the resistor of the same specification.
3. If the indicator wire is loose or welded, find out the loose or welded part, reconnect the wire, and continue to use it if there is no abnormality.
How to repair the rice cooker if it is not hot? The indicator light was repaired, and when I turned on the power supply, I found that the indicator light was on, but the cooker was not hot. The fault is usually due to the burning or poor contact of the electric heating element, or the circuit is not connected. What if the rice cooker is not hot?
1. The electric heating element is damaged. It can be measured with a multimeter. If it is damaged, it is necessary to replace the electric heating element of the same specification. If the electric heating element is embedded in the electric heating plate by burning and casting, it is only necessary to replace the electric heating plate together.
2. Poor contact of automatic switch or insulator: Normally, the contact looks closed, but due to long-term use, the contact is burnt out, resulting in poor contact. When it is not serious, polish it with emery cloth to make it smooth. In severe cases, contacts or phosphor bronze sheets or bimetals must be replaced.
How to jump the button when the rice is not cooked? When cooking, you may also encounter such a situation, and the automatic switch will jump when the rice is not cooked. Usually, you need to do some tests to find out the reason. Then what will cause the switch to jump before the meal is cooked? How to repair this fault?
1, check whether the contact moves forward due to high voltage. If the power supply voltage in this area is often too high, use a voltage stabilizer to stabilize the voltage before using the rice cooker.
2. Whether there is too little water in the pot of indirect heating rice cooker. There is too little water and steam, and there is no water before the rice is steamed, which causes the automatic switch button to jump. The correct way is to add water to the inner pot in proportion.
3. Whether there is too little water in the pot of the direct-heating rice cooker. The rice has not absorbed enough water, and the temperature at the bottom of the inner pot has reached the temperature value of automatic shutdown, so it is necessary to increase the water amount appropriately.
4. The bottom of the inner pot is deformed, resulting in poor heat conduction. The correct way is to reshape the inner pot to make it in good contact with the electric heating plate. If it can't be reshaped, you can replace the inner pot with the same size.
5. When using the bimetallic automatic switch, the automatic point is too low, and the adjusting screw can be adjusted appropriately. The method is to loosen it counterclockwise twice to increase the bending distance of the bimetal.
6. When using the ceramic ferromagnetic automatic switch, a new switch must be replaced. If necessary, consider checking other components together.
What if the rice cooker can't keep warm? During the use, I found that the rice cooker could not keep warm. There may be something wrong with the insulation circuit, which needs to be repaired in time. The insulation circuit of the rice cooker is damaged. How should I fix it?
1. When the independent thermal insulation electric heating element is damaged and the thermal insulation function cannot be realized, the thermal insulation electric heating element with the same specification should be replaced.
2. The contact of insulator is damaged due to fatigue, which leads to poor contact and can not be opened and closed normally. At this point, the contacts should be replaced.
3. The contact of the insulator is damaged. If it is not serious, it can be polished with emery cloth to keep it smooth. If it is serious, it is necessary to replace the contact or replace it together with the contact piece.
4. The bimetal of the thermal insulator is damaged, so the contact cannot be contacted. Bimetal or the whole insulator should be replaced.