Хорошо ли иметь дополнительный электрический обогрев для кондиционера? Каковы плюсы и минусы?
Nowadays, many air conditioners have the "electric auxiliary heating" function. We can see on the button of the air conditioner remote control. After clicking, the electric auxiliary heating function will be turned on; in addition, after we turn on the heating mode, when the indoor and outdoor temperature difference If it is larger, the electric auxiliary heating function will also be automatically turned on. When the outdoor temperature is low, the heating effect of general air conditioners will become very poor. Most brands will choose to use electric auxiliary heating, which can not only control the production cost, but also achieve the heating effect required by the state.
Before explaining "electric auxiliary heating", let's first understand the heating principle of air conditioners. Air conditioning generally depends on the power of the compressor in terms of cooling and heating, which are inseparable from the compressor, refrigerant (refrigerant), and heat exchanger (evaporator, condenser) of the air conditioner.
When the compressor is running, the refrigerant (refrigerant) flows in the air-conditioning pipeline, and under the action of the compressor, it continuously changes its form (liquid state, gaseous state), absorbs and releases heat continuously in the process, and then exchanges heat through the heat exchanger, which is understandable. for "heat transfer".
However, when the air conditioner is refrigerating, the refrigerant (refrigerant) runs in the forward direction, absorbing heat indoors, dissipating heat outdoors, and transporting the high temperature in the room to the outdoors; while the air conditioner is heating, the refrigerant (refrigerant) runs in the reverse direction. The outdoor heat is absorbed, the indoor heat is dissipated, and the outdoor high temperature is transported indoors.
What exactly is "electric heating"?
The electric auxiliary heating function of the air conditioner is actually adding a semiconductor heating ceramic near the air outlet - you can understand this ceramic as fast heating, electric heating, etc. In short, it is a simple device that directly converts electrical energy into thermal energy.
The air from the air conditioner passes through this heating device, and it is hot when it is blown out - just like a hair dryer that emits hot air.
What are the advantages and disadvantages of electric auxiliary heating?
For merchants, the cost of adding ceramic heating elements is not high, and there is almost no technical content. Therefore, the air conditioner with the electric auxiliary heating function can effectively save the manufacturing cost of the business air conditioner.
Also, in cold weather, the heating capacity of the air conditioner decreases. Because in winter, the temperature difference between indoor and outdoor is large, and the outdoor temperature even reaches below 0 degree . The air conditioner needs to absorb heat outdoors and then dissipate heat indoors, and the process will be very slow; another reason is that when the air conditioner is heating, There will be a defrosting process. The defrosting process occurs on the heat exchanger of the outdoor unit. Without defrosting, the outdoor unit cannot continue to absorb heat, and the defrosting speed will also reduce the efficiency due to the low outdoor temperature.
Therefore, air conditioners with electric auxiliary heating function will heat up faster during heating, and even in winter, they can have good heating efficiency, which is also the biggest advantage of air conditioners with electric auxiliary heating.
However, in terms of shortcomings, under the electric auxiliary heating function, the heating method of the air conditioner is very rough. Simply raising the temperature of the air will not increase the humidity, which will also cause the indoor air to become very dry, giving us a comfortable feeling. The degree is not high.
Moreover, the thermal energy conversion efficiency of this ceramic heating element is not high, and the heating ratio is very poor. Compared with the air conditioning heating PTC, the heating energy efficiency is very poor, only 1/3 to 1/4 of the thermal efficiency of the air conditioning heating. Therefore, from the perspective of energy efficiency, PTC electric auxiliary heating is very unnecessary.
Is it good to have electric auxiliary heating for the air conditioner?
Some people say that air conditioners with "electric auxiliary heat" are not good, is it true? Actually, there is some truth to this statement. Air conditioning and refrigeration is the duty, but heating is the ability. The reason why the air conditioner is equipped with "electric auxiliary heat" is to make up for the lack of heating capacity of the air conditioner. A good air conditioner has excellent heating capacity, and there is no need to rely on this function to make up for it.
If the compressor manufacturing technology is excellent, even in a low temperature environment, it can rely on the superior performance of the compressor to achieve heating; the air conditioner with electric auxiliary heating function is often to reduce the cost and cover up the shortcomings of its own compressor technology.
Therefore, the heating and cooling air conditioner with the function of "electric auxiliary heating" is definitely not as good as the cooling and heating type air conditioner without the function of "electric auxiliary heating", which at least shows that there is a certain gap between the manufacturing cost and technology of the two. Because of this, heating and cooling air conditioners without "electric auxiliary heating" function are more expensive.
Should I buy an air conditioner or electric heating?
As mentioned above, air conditioners without "electric auxiliary heating" function are more expensive. If we need to use air conditioners for heating for a long time, and if the economic budget is sufficient and the pursuit of life is relatively high, it is preferred not to have "electric auxiliary heating" function. The air conditioner is more comfortable and saves electricity.
If you pursue cost-effectiveness and do not need to use air conditioners for heating for a long time, it is enough to choose an air conditioner with an "electric auxiliary heating" function. Anyway, the heating demand of the air conditioner is small, the heating function is not commonly used, and the electricity bill will not cost much.
