切勿將熱的食物放入冰箱?

Love your bowl of piping hot stew, now head to the fridge to chill the rest? stop! You may need to wait for it to cool to room temperature before placing it in the refrigerator. To get all our kitchen tasks done quickly, we often keep food that is still warm in the refrigerator. Did you know this could actually be dangerous for you and your family?

The purpose of freezing is essentially to prevent food from losing its nutritional content and keep it fresh and free from contamination for a longer period of time. Whether freezing, heating or refrigeration, it's best to use caution. If you put hot food or hot liquids in the refrigerator right away, you may lose its nutritional value and may make your refrigerator run extra hard. However, it is okay to put lukewarm food in the refrigerator. Wait until it comes to room temperature at least before refrigerating.

Hot food should be brought to room temperature because salmonella can easily spoil food in the refrigerator if left in the refrigerator (piping hot). Additionally, placing hot food in the refrigerator can cause the food to spoil. If you place other perishable foods (eggs, vegetables and meat) in the refrigerator, the likelihood of them becoming contaminated increases.

However, you should not wait longer than a certain amount of time. Hot food should not be left out for more than two hours, as bacteria can begin to multiply after this time. If you want to wait, refrigerate within two hours. Always ideal for storing all perishable foods milk, vegetables, meat and delicatessen to avoid spoilage. If you are storing cooked food, do so within 2 hours of cooking. Cooling faster also helps, break food into smaller portions so they cool faster and can be frozen faster to avoid contamination.

Wrap food in airtight containers or aluminum foil to maintain the food's moisture content. This also prevents odors from different foods from mixing while keeping bacteria out. Frozen food can be kept for up to about 2-3 months, but check the color, smell and taste of the food to see if it is ready to eat.

Another common myth about putting hot food in the refrigerator is that it's harmful to your body. Your device may affect the temperature of the food around it. Well, with newer appliances, you don’t have to worry too much, the refrigerator thermostat will ensure that your appliances don’t get damaged by regulating the temperature and humidity. However, if you have an older model, you may choose to take some precautions, such as storing hot foods in airtight containers, which can help avoid condensation and freezing.

Tips to make sure before refrigerating hot food

  • If you must put hot food in the refrigerator, try not to place hot food in a deep container. They take longer to cool, place them in a shallow container so they can cool easier. You can then place these very shallow containers in the refrigerator, which will also ensure faster cooling.
  • Divide food into smaller portions. Put them into smaller containers
  • You can also quickly cool food in an ice-water bath before refrigerating it.
  • You can also leave it on the counter to cool until the steam stops.
  • Cover hot liquids to be chilled. If left uncovered, they can release moisture, making the compressor work harder than it should.

As a general rule of thumb, it is always recommended to place containers (whether hot or mild) wisely, paying attention to the space between them to ensure better air circulation and optimal cooling. Make sure you don't leave food out for more than two hours, as bacteria can start to grow quickly.

Why is it a bad idea to put hot food in the refrigerator?

In many refrigerator instructions, it is said not to put hot food in the refrigerator as this will affect the functionality of the refrigerator in the long run. Storing hot food puts additional stress on the refrigerator machinery and should be avoided.

However, there are other reasons besides the health of your refrigerator, specifically the health of the food inside it. Placing hot food inside will raise the temperature inside, making the contents hotter. Therefore, the refrigerator compressor has to work harder to keep the internal temperature where you want it.

Now, the ambient air is warming, but think about how this is actually happening. We have all read about the second law of thermodynamics, which says that heat moves from a place with a higher temperature to a place with a lower temperature. This is what convection does.

convection

Convection is a mode of heat transfer that occurs in freely moving states such as liquids and gases. When a hot liquid or gas heats up, it becomes lighter and rises, while cooler air replaces it below.

condensation

Secondly, when we put something hot into the refrigerator, the temperature difference between the two systems can cause condensation. These droplets can end up on the back wall of the refrigerator, where they can freeze food that comes in contact with them. In addition, condensation will increase the moisture in the refrigerator environment, which is not conducive to food preservation.

The entire process of heat transfer through convection and condensation into the form of droplets resembles a very important natural process.

Rain is caused by evaporation and condensation, and we see a small version of this natural process taking place when we put warm food in the refrigerator.

When we put hot food in the refrigerator, due to the combined process of convection and condensation, the internal environment of the refrigerator becomes unfavorable for preservation and the optimal functionality is reduced due to the increase in temperature and humidity inside the refrigerator.

If I need to store hot food in the refrigerator urgently

One way to prevent your refrigerator from getting too hot during an emergency like this is to divide food into smaller portions. Leaving some space around the food so that cold air can flow around it will speed up the cooling process and prevent too many negative effects of placing hot food in the refrigerator.

Review

All comments are moderated before being published

HealthyPIG Magazine

View all
牛肉與腸道微生態:人體點樣反應?

牛肉與腸道微生態:人體點樣反應?

牛肉進入身體之後會發生咩事? 食牛肉之後,身體會進入「高蛋白消化模式」: 胃部階段:胃酸(pH約2)與胃蛋白酶一齊將牛肉蛋白質分解成小分子胺基酸鏈。此時釋放「胃泌素(gastrin)」促進更多酸及酶分泌。 小腸階段:十二指腸接收食糜後,胰臟釋出胰蛋白酶、脂肪酶,肝臟釋出膽汁乳化脂肪。 ...
從嗜睡症、慢脈搏到米諾地爾 (Minoxidil) 的全身動力學

從嗜睡症、慢脈搏到米諾地爾 (Minoxidil) 的全身動力學

當身體進入「慢模式」——嗜睡症與自律神經的連結 嗜睡症(Narcolepsy)是一種大腦覺醒系統的紊亂,患者在日間容易突然進入睡眠狀態。但其實,嗜睡症不止影響「睡眠」,還會影響全身的 自律神經系統 (Autonomic Nervous System)。 自律神經負責調節: 心跳快慢(交感與...
降血壓,唔一定靠藥!了解身體機制,從生活開始調節

降血壓,唔一定靠藥!了解身體機制,從生活開始調節

高血壓唔係「年紀大」嘅專利,愈來愈多年輕人都有血壓偏高。其實,血壓高並非只係「壓力大」咁簡單,而係整個身體系統出問題:心臟、血管、腎臟、神經、荷爾蒙都有份參與。

原糖 vs 紅糖 vs 白糖:哪一種更健康?

原糖 vs 紅糖 vs 白糖:哪一種更健康?

日常生活中,我們常見的糖有「原糖」、「紅糖」與「白糖」。三者外觀、味道甚至用途都略有不同,但在營養與健康層面上又有幾大差異。本文將帶你深入了解它們的製作方式、特性與對身體的影響。

籃球係有氧運動嗎?— 一文睇清有氧同無氧運動嘅分別、好處同平衡之道

籃球係有氧運動嗎?— 一文睇清有氧同無氧運動嘅分別、好處同平衡之道

籃球係全球最受歡迎嘅運動之一,無論係街場隨意投籃、定係正式比賽,都可以幫助身體活動。但你有冇諗過,籃球到底屬於「有氧運動」定「無氧運動」?兩者又有咩分別?點樣玩先至最有益身體?

本文會同你用簡單角度拆解「有氧」同「無氧」嘅概念,並講解籃球點樣同時結合兩者,最後再分享點樣令你嘅籃球運動更健康、更有效。

男士禿頭對策:了解雄性禿與5%米諾地爾(Minoxidil)生髮原理

男士禿頭對策:了解雄性禿與5%米諾地爾(Minoxidil)生髮原理

雄性禿是什麼?為何只在頭頂出現? 好多男士年過25歲開始發現頂部頭髮越來越稀疏,但前額線卻似乎仍然正常,這情況其實非常典型。這種情況稱為 雄性禿 (Androgenetic Alopecia),是男性最常見的脫髮原因之一。 主要成因來自兩方面: 遺傳基因:如果父母其中一方有禿頭問題,後代的...
發現死老鼠點處理?

發現死老鼠點處理?

喺屋企、後花園、廚房甚至車房發現一隻「死老鼠」唔係罕見事,但好多屋主第一時間會「嚇親」或者「即刻掃走」。其實咁樣反而危險!
死鼠可能帶有漢他病毒、鈎端螺旋體病、沙門氏菌等病原體,一旦處理唔當,吸入塵埃或者接觸體液,都可能感染疾病。以下教你一套澳洲、香港、台灣都適用嘅安全清理步驟。

老鼠與大鼠的衛生影響:對人體與家居健康的真正威脅

老鼠與大鼠的衛生影響:對人體與家居健康的真正威脅

「老鼠」同「大鼠」雖然都屬於齧齒類,但牠哋對人類健康嘅影響有明顯分別。本文會詳細講解牠哋嘅衛生差異、疾病傳播途徑、同預防方法

無人機醫療配送:低空經濟下的香港新契機

無人機醫療配送:低空經濟下的香港新契機

  無人機醫療配送:低空經濟下的香港新契機 —— 從健康、醫療金融到商業模式的全球比較與啟示 在香港「低空經濟」監管沙盒下,無人機由數碼港跨海至長洲醫院,約 12 公里航線僅需 18–20 分鐘,相比傳統 45–65 分鐘大幅提速。本文聚焦醫療價值、醫療金融回報與商...