[PConline Tips] Frequently appearing explosions in the movie often lead people to see blood shots, but the plot in the movie is full of exaggeration and artistic elements. If the explosion happens in real life, it will definitely bring about major losses. . But do you know that? It is not just sulphur explosives that will cause explosions. In fact, if some home appliances in our lives are used improperly, they will become a home-sized time bomb!
Pressure cooker
Pressure cooker explosion
Speaking of appliances that will explode, I immediately think of pressure cookers. There has been news on the explosion of the pressure cooker on the Internet. Therefore, every time I use the pressure cooker at my grandma's home, I will be careful and careful, for fear that the next second will be a "BOOM!
The principle of the autoclave is actually very simple, because the boiling point of water is affected by the pressure. The higher the pressure, the higher the boiling point. Conversely, the lower the pressure, the lower the boiling point. For example, in a place where the atmospheric pressure is less than 1 unit like a plateau or mountain, the water temperature will be boiling when the temperature is less than 100 degrees. Therefore, many dishes are not cooked properly with ordinary pots. The pressure cooker is based on this principle. The water is tightly sealed in the pot. The water vapor generated when the water is heated will not be eliminated in time, but will remain in the pot. The pressure inside the pressure cooker will be higher than 1 atmosphere. The boiling point of water will be higher than 100 degrees Celsius. In such a high-temperature and high-pressure environment, not only can cooking speed be accelerated, but it can also make food more crunchy.
Pressure cooker explosion reason?
So why does the pressure cooker explode? Just as balloons and tires can't inflate them without limit, pressure cookers can withstand the same pressure levels. When the pressure in the pan exceeds the design limit, it will explode like a balloon.
In general, high-pressure cookers provide dual insurances for the air outlet valve and the safety valve. Only when both of them fail, the high-temperature steam cannot be discharged before the explosion is caused.
How to prevent pressure cooker explosion?
1, carefully check the safety valve before use and the pot body has no obvious cracks or deformation;
2, food should not exceed four-fifths of the total capacity, preferably about two-thirds;
3, when the lid is attached, be sure to cover the upper and lower lids. When cooking, steam is discharged from the exhaust hole and then the upper limit pressure valve is added;
4, when the pressure limiting valve discharges more gas, louder, pay attention to reduce heating;
5, before opening the cover must wait for the pressure to be completely removed to open the cover, can not force the handle to open the cover.
Microwave oven
Microwave explosion
For a family working in the city, microwave ovens heat food fast, it is an artifact! However, if the microwave oven is used improperly, it will become a time bomb in the home. I remember a news from the previous period left a deep impression on the author. One user used a microwave oven to heat the eggs and the microwave oven exploded.
Microwave ovens use microwaves to radiate into food. Polar molecules such as water, fat, protein, and sugar in food absorb microwaves and rapidly oscillate, which in turn produces a phenomenon similar to frictional heat, which raises the temperature of the water. Therefore, the temperature of the food will also Rapid rise.
Why does a microwave oven explode?
The microwave oven itself does not explode. Usually the explosion is caused by heating the food in the microwave oven. For example, sealed cans, sealed foods, sealed plastic bag-packed foods, complete shell eggs, and full-shelled chestnuts This may be due to the expansion of heated water molecules in the microwave oven, which causes the gas to break through the outer packaging and explode.
How to prevent microwave explosion?
1. Use wide mouth containers when heating liquid foods. Do not heat foods such as sealed cans, eggs, grapes, whole chestnuts, sealed milk boxes, etc.
2. Do not use metal utensils for heating: Because the metal utensils such as iron, aluminum, stainless steel, enamel, and tin foil are placed in the furnace, the microwave oven will generate electric sparks and reflect microwaves when heated, which will not only damage the furnace but also Unfamiliar with food, serious and easy to cause fire.
3, remember to use microwave ovens to fry food, due to high temperature oil splashes will lead to open flame. If accidentally causing a fire in the furnace, do not open the door, but should first turn off the power, wait until the fire goes out and then open the door to cool down.
washing machine
Washing machine explosion
For many users, the washing machine is not related to the explosion. In fact, the general household washing machine has no explosive condition whether it is a pulsator or a roller, but if the user adds a fuse to it, Then, the washing machine will become a blockbuster!
The pulsator washing machine rotates the pulsator wheel driven by the motor through the belt, and the clothes and water and the detergent are rotated clockwise and counterclockwise as the pulsator rotates. The purpose of the tumbling mixing is to keep the stains and detergents in the clothes. React well and let the stains fall off by the action of kinetic energy.
The drum washing machine rotates the drum through a deceleration sheave. Through continuous rotation, the clothes in the drum are rotated up to the highest point, and then fall down, and the laundry can be washed by the mechanical action of constant drop and beat.
Why does the washing machine explode?
From the point of view of the structure and components, the washing machine itself does not seem to have any explosion conditions and there are no flammable or explosive substances. The cause of the explosion of the washing machine is the user washing clothes and drying it. When a user blows clothes with poor ventilation such as down coats and sweaters are prone to static electricity, they are prone to explosion.
When the user spins down the down jacket, the down jacket that had previously been saturated with water will rapidly expand due to high speed drying, and will be filled with air. At this time, the waterproof coated down jacket plus water adheres to the surface of the clothing and the gas will be difficult to discharge. . As the space in the washing machine is continuously filled, explosions are likely to occur when the critical point is reached. Secondly, materials that are prone to static electricity, such as down jackets and sweaters, are prone to static electricity during the drying process, and they are also prone to explosion when they repel large amounts of heat.
How to prevent the explosion of the washing machine?
1, before using the washing machine, carefully read the instructions, according to the use of the washing machine instructions for use, especially for risky slogans must be carefully checked, according to the process operation;
2. Before cleaning the clothes, the contents of the clothes pocket should be cleaned to prevent explosions such as lighters and other inflammable and explosive objects from entering the washing machine.
3, for the down jacket, sweaters and other clothing when cleaning, try to avoid the use of drying function, if you want to dry, it is best to place the clothes in advance in the net bag and then dry.
water heater
Electric water heater explosion
The accidents we often hear about electric water heaters are mostly electric leakage accidents. However, in addition to electric leakage, electric water heaters may cause danger to users. In addition, explosions can occur when certain conditions are met, so people have to pay attention!
Electric water heaters are heated and unheated by turning on and off the thermostat. The general concept of heat preservation is short-term heating. When heating, the rated power of the water heater is still used. After the circuit is turned on, if the water temperature is lower than 50°C (the critical temperature set by most brands), the thermostat is automatically turned on and the water heater starts heating. The water temperature reaches the preset temperature of the water heater (most brands are 75°C～85°C) When the thermostat is disconnected, the heater stops heating.
Why does an electric water heater explode?
In order to prevent explosion caused by excessive temperature, electric water heaters have set up three lines of defense: thermostats, overheating protectors and one-way valves. If the thermostat is broken, the overheat protector will automatically trip and shut off when the temperature is too high. If the first two items are all broken, the one-way valve will discharge the vapor from it. Electric water heaters and boilers have certain similarities. The most likely boiler explosions are excessively high temperatures that generate large amounts of steam. Therefore, once both protectors are damaged, a large number of steam exhausts will cause the water heaters to explode.
How to prevent the electric water heater from exploding?
1. The first use after the first use or maintenance cleaning must first fill the water heater and then turn on the power;
2. The power supply wire used by the water heater must meet the request of the rated current value of the water heater;
3, power outlet must have a solid ground wire;
4, no wet hands to pull the power plug, long-term use should unplug the power plug;
5, the peace valve must not adjust its pressure relief pressure;
6. If you want to connect and drain the safety valve at the pressure relief port, the discharge pipe must face down, and stick to the atmosphere;
7. In the winter, if the water heater is not used for a long time, the water in the tank should be drained to prevent the ice from damaging the tank. Note that the power must be cut off after the exhaustion.
8, the maximum temperature of the water heater up to 75 °C above the initial use of water, should first test the water temperature, so as not to burn.
The full text of the summary: The danger is on the side, the correct use and prevention will have a great chance to escape the disaster. The author hopes that everyone can check in the use of electrical appliances to find the hidden time bombs in time so that appliances can really serve your life instead of causing trouble for your life.
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