What is the best way to keep food in the refrigerator?

The temperature of the freezer should be adjusted to about-18 degrees, and the temperature of the freezer should be between 4 and 8 degrees. It depends on the kind of food to be preserved. Different kinds of food have different optimal storage temperatures.

In addition, higher temperature can effectively save electricity, and lower temperature is relatively beneficial to food preservation, but the power consumption is relatively high.

Attachment: the best storage temperature of various foods.

First, the preservation of fruits.

1, the optimum fresh-keeping temperature of fruits.

★ Apple: The suitable cold storage temperature is-1℃ ~+ 1℃, the humidity is 85% ~ 90%, and the storage period is 2-7 days.

★ Pear: Suitable cold storage temperature is-1℃ ~+ 1.5℃, humidity is 85% ~ 90%, and storage period is 1-6 days.

★ Watermelon: The suitable cold storage temperature is 2℃ ~ 4℃, the humidity is 75% ~ 85%, and the storage period is 7- 10 day.

★ Cherry: Suitable cold storage temperature is 0.5℃ ~ 1℃, humidity is about 80%, and storage period is 7-2 1 day.

★ Coconut: The suitable cold storage temperature is -4.5℃ ~-3℃, the humidity is about 75%, and the storage period is 8- 12 days.

★ Grape: The suitable cold storage temperature is-1℃ ~ 3℃, the humidity is 85% ~ 90%, and the storage period is 1-4 days.

★ Strawberry: The suitable cold storage temperature is -0.5℃ ~ 1.5℃, the humidity is 75% ~ 85%, and the storage period is 7- 10 day.

★ Oranges: Suitable cold storage temperature is 0℃ ~ 65438 0℃, humidity is 80% ~ 90%, and storage period is 50-70 days.

★ Pineapple: The suitable cold storage temperature is 4℃ ~ 12℃, the humidity is 85% ~ 90%, and the storage period is 14-20 days.

2. Fruits not suitable for cold storage

Many fruits are not suitable for refrigerator storage, especially tropical fruits such as mango, litchi and banana. Mango is afraid of cold. Once in the refrigerator, black spots began to appear a few days later. When litchi is stored at 0℃ for one day, the peel will turn black and the pulp will turn sour. Bananas are prone to blackening, rot and even mildew when placed below 12℃.

In addition to tropical fruits, persimmon and other berry fruits will lose their fragrance at low temperature and their skins will deteriorate. None of these fruits is suitable for cold storage.

Second, the preservation of vegetables.

1, the most suitable temperature for vegetable preservation.

★ Green pepper: The suitable cold storage temperature is 7℃ ~ 10℃, the humidity is 85% ~ 90%, and the storage period is 10-20 days.

★ Cauliflower: Suitable cold storage temperature 1℃ ~ 2℃, humidity 80% ~ 90%, storage period 14-20 days.

★ Potato: The suitable cold storage temperature is -3℃ ~ 6℃, the humidity is 85% ~ 90%, and the storage period is 6- 10 day.

★ Onion: The suitable cold storage temperature is-1℃ ~ 0℃, the humidity is 80% ~ 85%, and the storage period is 3-7 days.

★ Cabbage: The suitable cold storage temperature is-1℃ ~ 0℃, the humidity is 80% ~ 90%, and the storage period is 10- 15 days.

★ Celery: The suitable cold storage temperature is-1℃ ~ 0℃, the humidity is 80% ~ 90%, and the storage period is 7- 10 days.

★ Cucumber: The suitable cold storage temperature is 7℃ ~ 10℃, the humidity is 85% ~ 90%, and the storage period is 5-7 days.

★ Eggplant: Suitable cold storage temperature is 7℃ ~ 10℃, humidity is 80% ~ 90%, and storage period is 10- 15 days.

2. Vegetables that are not suitable for the refrigerator

After some vegetables are put into the refrigerator, they can not only keep fresh, but also cause cell damage, loss of nutrients such as vitamin C, and even more prone to spoilage.

If beans are stored in the refrigerator, they will greatly affect the taste, so they should be stored indoors to avoid sunlight; Pumpkin is suitable for storage above 10℃, but it will soon become soft, sticky and lose its flavor in the refrigerator. Tomato is suitable for storage above 10℃. Soft rot or cracking is easy to occur after cold storage, and black spots are easy to appear on the surface. After a long time, it will rot and rot.

Although these vegetables are best stored at room temperature, the air humidity at home is generally not very high, about 60%, which is very unfavorable for storing vegetables. Therefore, even if you don't put it in the refrigerator, you still need to seal it with a clean fresh-keeping bag or put it in a sealed container to prevent the vegetables from losing water.

Third, the preservation of meat food.

1, the optimum fresh-keeping temperature of meat food.

★ Fresh meat: The suitable cold storage temperature is 0℃ ~ 1℃, the humidity is 80% ~ 85%, and the storage period is 8- 10 day.

★ Frozen meat: The suitable cold storage temperature is-14℃ ~- 18℃, the humidity is 85% ~ 90%, and the storage period is 15-30 days.

★ Fresh fish: The suitable cold storage temperature is-1℃ ~ 5℃, the humidity is 90% ~ 95%, and the storage period is 7- 10 day.

★ Frozen fish: The suitable cold storage temperature is -7℃ ~- 10℃, the humidity is 90% ~ 95%, and the storage period is 15-30 days.

★ Shrimp: The suitable cold storage temperature is -7℃ ~- 10℃, the humidity is 80% ~ 85%, and the storage period is 10 ~ 15 days.

★ Eggs: Suitable cold storage temperature is-1℃ ~ 1℃, humidity is 80% ~ 90%, and storage period is 8- 12 days.

2. Meat is not suitable for storage after thawing.

When frozen meat and fish are frozen, their cells have been destroyed due to the crystallization of water. Once thawed, destroyed tissues and cells will exude a lot of nutrients and become nutrients for bacterial reproduction.

The experiment showed that the spoilage rate of frozen yellow croaker was faster 1 times than that of fresh yellow croaker when it was stored at 30℃ for 6 hours. After thawing, the number of bacteria increased by about 2 times when the yolk was stored at 65438 08℃ for 2 hours. After standing for 8 hours, the number of bacteria increased by 50 times.

Nowadays, urbanites are busy with work and have little time to go shopping in supermarkets. Many people choose to buy food for a week or even a month, and put it in the refrigerator when they go shopping. After a few days, they find that many foods are rotten and inedible, which has caused great waste. So, don't mistakenly think that the food you buy will be fine in the refrigerator. It is good to know some common sense of food preservation.

Four, the most easily preserved food types in the refrigerator at different temperatures.

According to the principle of high temperature rising and low temperature falling, we can infer that the temperature inside the refrigerator is different whether it is the freezing room or the refrigerating room. For example, the top floor temperature of the refrigerator is the highest and the bottom floor temperature is the lowest, and the internal temperature of the refrigerator will be relatively low, especially at the evaporator on the back wall, while the temperature near the refrigerator door is higher. We can reasonably store different foods according to different temperatures in the refrigerator.

1, refrigeration room from top to bottom

★ 10℃- red wine, pepper, yam and tea;

★9℃- eggplant, pumpkin, bitter gourd and citrus;

★8℃- Watermelon and cosmetics;

★7℃- celery, loofah and beans;

★6℃- cucumber, edible fungi and leek (cucumber will be soaked in water when it is put into 0℃);

★5℃- lettuce, bean sprouts and tofu (fresh tofu is not suitable for Fang Chen, so it is best to eat it on the same day);

★4℃- cakes, apples, cauliflower and potatoes;

★3℃- beans, drinks, fruit juice, milk;

★2℃- cheese products, fermented beans, spinach, pears, carrots;

★ 1℃- fresh eggs, peaches, grapes, strawberries, apples, etc.

2, replace the greenhouse and freezer:

★0- Various ready-to-eat foods;

★-3℃- cooked food, fish for 2 days, beef 10 days, mutton for 25 days;

★-7℃- Beef, pork and mutton can be shredded without thawing;

★- 10℃- The ice cream tastes soft;

★- 15℃- fish can be stored for 20 days, beef, mutton and pork can be stored for 150 days;

★- 18℃- beef can be stored for 180 days, fish can be stored for 25 days, and mutton and pork can be stored for 150 days.

Five, the best storage temperature of food

☆ The best cold storage temperature of fresh fish is minus 3 degrees.

☆ Meat can be stored for one week at 2℃ to 5℃.

☆ Barreled beer and bottled beer should be stored at 0 to 5 degrees, and bottled mature beer should be stored at 10 to 25 degrees.

☆ The optimum temperature for fresh milk refrigeration is 2℃ to 4℃.

☆ Tea stored at -20℃ to 10℃ can prevent the quality from deteriorating for a long time and keep the vitamins from being destroyed.

☆ The optimum temperature for storing alcohol is 5℃ to 20℃.

☆ The optimum temperature for grain storage is 8- 15℃, which can prevent insects from growing in grain.

☆ The optimum temperature of frozen fish: below minus 3 degrees. At this temperature, the fish is not easy to deteriorate and the flavor can be preserved.

☆ The optimum temperature for storing eggs is below 15℃, and eggs are not easy to deteriorate.

☆ The optimum temperature for storing potatoes is 2-4 degrees. If the temperature is too high, it will sprout and affect eating.

Six, the refrigerator to store food matters needing attention

1, hot food should not be put into the refrigerator immediately, which will affect the cold preservation of other foods, increase the workload of the compressor and increase the power consumption of the refrigerator.

2. The food stored in the refrigerator should not be too full or too tight, and there should be a gap to facilitate cold air convection. Whether it is a direct-cooled refrigerator or an air-cooled refrigerator, if there is no hot and cold air in the box for heat exchange, the refrigerator may never stop, which not only wastes electricity, but also affects the service life of the refrigerator. It is best to put two-thirds of food, too much will affect the temperature conduction and balance, too little will accelerate the loss of cold air, if there is too little food, you can put empty beverage bottles in a standby position to reduce the loss of cold air.

3. The freezing room of direct cooling refrigerator must be defrosted regularly, because the existence of frost layer will affect the transfer efficiency of cold energy, and the refrigerator can not reach the set temperature. This will bring a great load to the refrigerator. Under normal circumstances, if the frost exceeds 6-8 mm, it is necessary to defrost it in time. In order to prevent the inside of the refrigerator from frosting too quickly, it is suggested that all the food in the freezer should be covered with fresh-keeping bags to prevent moisture from evaporating and frosting.

4. Thawed meat and fish should be eaten as soon as possible and should not be stored in the refrigerator again. If stored again, meat, fish, etc. will restore the vitality of bacteria and enzymes, which may produce toxic histamine substances and bring food safety hazards.

5. Bottled liquid drinks should not be put into the freezer to avoid freezing and cracking the packaging bottles. It should be stored in a refrigerated room, and the optimum storage temperature is about 4℃.

6, refrigerator crisper is conducive to food preservation, eat the rest of the food must be put into the crisper before it can be stored in the refrigerator, otherwise it will easily deteriorate and cause cross-contamination.