1. Is it true that shoveling ice into the refrigerator at will can easily lead to explosion? Why did the ice shovel in the refrigerator explode?
Let's start with the conclusion. It is true that shoveling ice into the refrigerator at will can easily lead to explosion. If you want to know the cause of the refrigerator failure explosion, you must first know its principle. R22, a commonly used refrigerant in refrigerators, was not flammable and explosive at first, but it was gradually eliminated due to poor environmental protection, and refrigerators on the market were rarely used. There are more R32 and R600a refrigerants, both of which are flammable and explosive. Usually, they are just sealed in the refrigeration tube, which will have no effect when used, but it is different when we deice the refrigerator.
When using shovels, knives and small scrapers to deice the refrigerator, the ice cubes are condensed and compacted, and it needs to be shoveled with greater strength. If you accidentally shovel into the refrigeration pipe, the coolant will leak and will be in a closed space when encountering electric sparks. It's really dangerous, and the explosion of the refrigerator is also the reason.
If sharp objects such as scissors and kitchen knives are used to poke the ice in the refrigerator, it may puncture the pipeline, leading to the leakage of difluoromethane or other flammable and explosive gases, reaching the explosive limit concentration.
In the case of concentrated explosives and explosions, electric sparks on the cutting line or sparks between sharp objects and metal pipes will cause explosions.
Someone has done an experiment: after scraping the ice off the inner layer of the refrigerator with a sharp knife, put an electronic lighter in the refrigerator to simulate the electric spark in the refrigerator. As expected, the refrigerator exploded violently at once (don't imitate it)
We speculate that the owner of the ice cream shop mentioned in the news may be because the refrigerator in the store is large and there are a lot of ice cubes, and he accidentally used a sharp weapon to violently deice, which led to an accidental explosion and a tragedy.
Second, how to safely deice the refrigerator?
First of all, you can look at the compressor behind the refrigerator, which says the model of refrigerant. If R32 is written as difluoromethane, then you need to be careful. In addition, R600a refrigerant is also very common. Its chemical name is isobutane, which can be understood as a component of natural gas, flammable and explosive. The first step in deicing the refrigerator is to cut off the power supply.
1. Use special deicing tools.
When we buy a refrigerator, we always attach a small plastic shovel to deice it. It's not so sharp that it won't puncture the refrigerator box, so it's safer to use it to deice the refrigerator. The refrigerator deicing tool is a special deicing tool, which is very convenient to use. This method is more suitable for the situation that the ice is not frozen at all and still frosts. Be careful not to tilt like a wrench when shoveling, because drawers and refrigerators are made of plastic, and it is easy to poke a hole.
Specific steps: cut off the power supply of the refrigerator and wait for the internal temperature of the refrigerator to rise; Open the refrigerator door, take out the drawers and compartments and clean them separately; Wipe the frosty place with a towel several times; When the temperature inside the refrigerator rises to a certain degree, remove the ice by deicing, put the deicing tool at the frozen place, gently push it, and then scrape the ice with the deicing tool. Note: Do not deice the refrigerator without a deicing shovel, otherwise it will damage the refrigerator.
↑ The sign on the refrigerator: Don't deice with sharp objects, use the attached plastic shovel, but many people may have lost this small plastic shovel. You can try the following methods.
2. Use hot water for deicing.
This is also the method that most families will choose. The main operation mode is to pull out all the drawers in the refrigerator and freezer after power failure. Then, you can dip some hot water in the ice with a towel and let it melt quickly. Hot towel ice is a good way. When implementing, you can wipe the inside of the refrigerator with warm water to accelerate the melting of ice, but because of the low temperature, remember to wear gloves when deicing.
Or directly put a pot of hot water in the refrigerator and close the refrigerator door, and melt the ice cubes with hot steam, and the effect is quite good. When it is found that the refrigerator at home needs defrosting, you can put a pot of boiling water in the freezer and use the hot air of boiling water to defrost. /kloc-After 0/0 to 20 minutes, the frost in the freezer began to melt and fall off. If the frost is too thick, you can change another pot of boiling water. However, it should be noted that if there is no metal evaporation plate at the top of the freezer, the basin filled with boiling water should be covered with a cover to avoid deformation of the plastic inner wall at low temperature.
In addition, you can also spray hot water with a sprayer. When you find that the refrigerator at home can't completely deice itself and the ice layer is thick, you can use a sprayer to spray hot water to eliminate it. Because the sprayer can spray small parts, no matter how thick the ice is, this method can quickly remove it.
3. Blowing deicing method
The hair dryer at home can be used not only to blow hair, but also to remove ice from the refrigerator. Because it takes a long time to defrost the refrigerator every time, if you open the freezer of the refrigerator and blow hot air directly into it with a hair dryer, the ice can be removed quickly. When the power of the refrigerator is turned off, you can use an electric fan or a hair dryer to blow in the direction of the refrigerator, and use the hair dryer to reduce the moisture in the refrigerator, thus dissolving the frost. Or blow the refrigerator with a hair dryer and defrost it at high temperature. It should be noted that the temperature should not be too high. Blow evenly and control the temperature.
4. Use salt water for deicing
Salt water can react with ice, snow or ice. As long as it is sprinkled on it, it will melt quickly in a short time. This is because the densities of the two substances are different, and salt water can catalyze the density degradation of ice cubes into liquids. The operation method is also very simple. You can use the watering can at home to spray some salt water, and it will take effect in five minutes. Pay attention to the water after ice disinfection, and be sure to clean it in time, otherwise it will block the drain of the refrigerator or touch other places.
Step 5 adjust the temperature
Generally, the temperature is adjusted between 3 and 4 degrees, so it is not easy to freeze. This phenomenon may occur if the temperature is not within this range. If it's not the temperature, check whether the food stored in the refrigerator is too hot. Avoid putting overheated food in the refrigerator. Hot air will cause a lot of condensed water, which will indirectly produce this phenomenon. If these two problems are eliminated, it may be caused by the damage of thermostat.
If you accidentally poke the box of the refrigerator during deicing or normal use, you should first cut off the power supply of the refrigerator and open the window for ventilation. People should evacuate quickly, call for repair after evacuation, or directly scrap the refrigerator. Some netizens said that the explosion caused by car body damage may also occur on air conditioners. Indeed, many refrigerants used in air conditioning are R32. However, the air conditioner is hung in a high place, and non-professionals rarely touch it, so it is relatively safe.
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Matters needing attention in deicing refrigerator
1, the food in the freezer should leave a certain gap. Never lean food against the back wall of the refrigerated liner.
2. Try to reduce the number and time of opening the refrigerator. Don't forget to check whether the door is closed after first frost to prevent air leakage.
3. In summer, due to the high ambient humidity, the freezing speed inside the refrigerator is faster. Generally speaking, the freezing chamber pipes and drawers of refrigerators are cleaned once a month. When deicing, please use the deicing shovel equipped with the refrigerator. If there is no deicing shovel, plastic devices can be used instead of sharp metal devices to prevent damage to the lining or pipeline. It is suggested to melt ice naturally or add a basin of hot water or use a fan to help melt ice, because the plastic part is too strong and will damage the pipeline. In winter, the deicing time can be appropriately extended, and the refrigerator can be cleaned when deicing.
The above are some methods and precautions about how to safely deice the refrigerator. Everyone must pay attention to their own safety. In fact, there are many ways to deice the refrigerator, but the most important thing is the daily maintenance of the refrigerator. There is no doubt that there will be more frost when there is too much water in the refrigerator. Therefore, don't put food that is still steaming in the refrigerator. At the same time, apply some vegetable oil and plastic film to the freezer regularly to facilitate the next cleaning. Finally, don't open the refrigerator door frequently.