Popularly speaking, what is the difference between heating 24℃ and cooling 24℃

Popularly speaking, what is the difference between heating 24℃ and cooling 24℃ Everyday use of air conditioners must have this experience: in the summer, the air conditioner is used for cooling. Setting the temperature to 24°C makes the room very cool, and in the winter, using the air conditioner to heat the same setting of 24°C will feel very warm in the house. Then the question is coming, the same is 24 ℃, why do summer and winter feel diametrically opposite? First, explain why setting the air conditioner at 24°C can achieve both cooling and heating. This is actually determined by the temperature control of the air conditioner (including cooling and heating) and the temperature measurement mechanism. The air conditioner has two heating modes: cooling and heating. The settable temperature range is generally 16-30℃. At the same temperature, although both the cooling mode and the heating mode can be selected, they may not always operate normally, mainly depending on the ambient temperature. After the air conditioner is turned on, the temperature sensor of the indoor unit will first detect the indoor temperature, and then compare the detected actual temperature with the set temperature. For example, if the air conditioner is set at 24°C and the indoor temperature is lower than 24°C, the air conditioner can operate normally when the heating mode is turned on, but it cannot operate normally if the cooling mode is turned on. Back to the question at the beginning of the article, at the same temperature, air conditioning cooling in summer and heating in winter have a completely different feeling. This is due to the illusion of somatosensory temperature caused by the temperature difference. Let’s take a simple example to illustrate: There are three glasses of water, the water temperature of which is 60 ℃, 30 ℃ and 5 ℃ respectively. Does the 30 ℃ water feel cold or hot? Not necessarily! If you put your hand in 60℃ water for a while and then put it in 30℃ water, it will feel very cold; but if you put your hand in 5℃ water for a while and then put it in 30℃ water, it will feel very hot. Therefore, it is the existence of temperature difference that makes people feel hot and cold. The human body cannot accurately sense the temperature, but it can feel the change in temperature difference, thereby producing cold and hot feelings. Understand this truth, the problem of air conditioning temperature will be solved. In summer, the indoor temperature is generally above 28℃, the air conditioning cooling is set to 24℃, which is lower than the ambient temperature, which makes people feel cool; the indoor temperature without central heating in winter is generally below 10℃, and the air conditioning heating is set to 24℃, which is lower than the ambient temperature It is much higher and makes you feel warm. In addition, many friends confuse the "set temperature" of the air conditioner with the "outlet temperature" and think that if it is set to 24°C, the outlet temperature of the air conditioner is 24°C. In fact, the set temperature ≠ the outlet temperature. The set temperature is the temperature value that the air conditioner will eventually reach the room through cooling or heating; the outlet temperature is the actual temperature value at the air outlet during the cooling or heating process of the air conditioner. Turn on the cooling mode of the air conditioner and set it to 24°C. The temperature of the air conditioner outlet is generally below 15°C. Select the heating mode and set it to 24°C. At this time, the temperature of the air conditioner outlet is about 40-50°C. It can be seen that the air outlet temperature during cooling is much lower than the set temperature, while the air outlet temperature during heating is much higher than the set temperature. But whether it is cooling or heating, it will eventually make the room reach the set temperature.

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