Efficient use of air conditioners

Let me start with four nonsense statements, including the previous one. The following is the text.

Efficient use of air conditioners

In the age when air conditioners were widely used in cities, air conditioners were needed. There are many discussions about air conditioners, such as effects, health, and energy saving.
What do we know about air conditioners and air conditioners?

How to save energy when using air conditioners may be a very interesting question.

Before talking about specific solutions, we should pave the way.

1. How do we heat the data?

Summer, hot. What we really need is to "feel" Cool, rather than lowering the ambient temperature.

We know that the normal body surface temperature is less than 37 ℃, the body will continuously produce heat, people need to heat to maintain the body temperature balance. The greater the difference between temperature and ambient temperature, the better the heat dissipation effect (such as winter ^-^ ). In addition, humidity is also an important factor affecting people's feelings. When the weather is hot, the higher the humidity, the hotter the people feel at the same temperature. This is because our sweat glands will emit sweat, which will evaporate on the surface of our body and take away considerable heat, which is not good if the humidity is high.

Of course, when the environment temperature is low, we will almost feel cool. In general, there is a temperature difference, there is heat transfer (nonsense ). It is usually suggested that the air conditioner temperature is set to 26 ~ 28 ℃ is suitable, that is, the indoor temperature is 26 ~ We feel comfortable at 28 ℃.

Furthermore, the wind can also make us feel cooler. Acceleration of air flow is more conducive to air heat exchange, take away the heat of our body; the wind can also accelerate the evaporation of sweat, faster take away the heat of our body. However, the premise is that the temperature of the air in the big environment cannot be too high, otherwise the effect will not be good, or even when it is too hot, the wind will make people more uncomfortable.

My personal feeling is that when the ambient temperature is 29 ℃ or even 30 ℃ and the relative humidity is not very high, it will not feel hot without activity.

In the hot days, we can stay in the cooler room for summer. The sky is getting hotter and hotter, and the house has become like a steamer. We need to let the house go down, so we have to sacrifice our commonly used household appliances --Air ConditionerGreat gods are playing.

We can use this image to reduce the temperature in the house:

Indoor A and outdoor B are two small and one small pools. A small channel is connected at the bottom of the pool. The water on one side of the high water level slowly flows to the lower side.

We are a creature living at the bottom of Pool A. The water pressure must be kept within a certain range to enjoy a comfortable life.

Assuming that the current water level of A is 30, we think it is a bit high. We hope that the water level of A is kept at 26. If the water level of B is at 35, this process is not that easy, a continuous flow of water from a needs to be pumped to B.

This pump is equivalent to an air conditioner.

2. How does the air conditioner work? 1. Working Principle

The specific principles are described in more detail in various online articles.

General Household air conditioners, two large blocks, outdoor units, and indoor units. In summer, the main task of the indoor unit is to blow the required "Cold Energy" into the room with a fan, and the outdoor unit releases "hot energy" to the outside. (Here, cold and hot energy refers to the manifestation of Temperature Difference)

However, if you want to allow the "hot energy" of the low-temperature side to go outdoors, the "cold energy" of the high-temperature outdoor areas cannot go indoors under natural conditions, therefore, some gases that are easy to compress and liquefied are used as refrigerant. The gas is compressed into a liquid, which will release heat. The liquid is decompressed and evaporated, which will absorb heat.

With this process, the refrigerant is compressed in the compressor of the outdoor unit, and then the heat is sent out through the heat sink, and then enters the indoor unit through capillary decompression, which flows through the heat sink to absorb heat, here, we can use a heat sink that blows through the air to reduce the temperature in the room. The refrigerant that absorbs heat then flows to the outside, so that the cycle.

In addition, when hot air is cold, water vapor in the air will condense. The heat sink of the indoor unit is very cold. When the wind blows, it will "sweat. This is the source of air-conditioning dripping water.

This is probably the case, just like the refrigerator.

2. Other problems

There is another problem. Use the remote controlThe temperature set by the air conditionerWhat effect?

For traditional air conditioners, there are usually temperature measuring devices (Advanced and remote controls) in the indoor air conditioners to monitor the indoor temperature. Of course, due to the location of the Temperature Monitor, it is not accurate. In the cooling mode, when the detected room temperature is lower than the set temperature, the external compressor of the air conditioner stops working and only keeps the internal unitAir SupplyStatus; when the room temperature is higher than a specified temperature range, resume operation. That is to say,No matter what the temperature is set, as long as the external machine is working, there is no difference in the wind from the air conditioner.

Now we haveInverter Air ConditionerInitially, this concept means that the compressor can change the operating speed by changing the current frequency to achieve different operating power. But now it actually refers to the compressor can change the operating speed. In this way, you can run at a higher power as needed, and quickly perform cooling (heating). When the temperature is close to the set temperature, the compressor can slow down the speed, reduce the power, and keep the room temperature. That isThe power of the compressor is changed based on the temperature difference between the room temperature and the Set temperature.This reduces the number of start times of the compressor and saves power.

NowDC Frequency ConversionAndAC frequency conversionThe two concepts refer to the original article address.

According to the working principle, inverter air conditioners can be divided into two types: AC inverter and DC Variable Speed. The polarity of the two electrodes of the DC circuit is fixed, and the current has only one flow direction. There is no alternating current, and there is no frequency at all. What is frequency conversion? The DC Speed Control Technology adopted is far better than the frequency modulation technology, and the DC speed change is the correct method. The simple difference between a DC Variable Speed air conditioner and a variable frequency air conditioner: The DC Variable Speed only goes through one voltage conversion, so the energy loss is less than the frequency modulation variable speed. In addition, because the rotor of the DC motor is permanent magnet, it saves the rotor current consumption of the three-phase AC asynchronous motor. Therefore, the power factor from the power supply of the power grid to the motor is higher than that of the Frequency Modulation Speed Control Mode, saving a certain amount of energy.

It's almost done.

3. How can I use air conditioners to save energy? 1. the simplest and most effective method is-no

Ah ......

2. Adjust the temperature appropriately to reduce the air conditioner working time.

As it is common to say, air conditioners in office spaces are set to temperatures of 26 to 26 ~ 27 ℃ is enough. Below 26 ℃, I guess you will feel cool when you sit there. Isn't that a waste.

The air conditioner in the home is usually set to 28 ~ 29 deg C will not feel hot, if you go to bed at 30 deg C is OK (don't say you want to cover the quilt ......). If a person stays in the air-conditioner on the road, I think you may not be hot when setting the air-conditioner to 31 ℃.

Because the specific circumstances are different, it is of course the best to find the appropriate temperature for each room, different locations, and different things.

Certainly,If the rated power of an air conditioner is sufficient for a cooling environment, setting the temperature to 16 ℃ is definitely not a good choice,In any aspect.

3. Use strong winds whenever possible (Guess)

This impact may not be too big, but it still has an impact. Why is it windy? When the outdoor unit is working, the cold internal unit heat sink is quietly there. The larger the air flow, the more conducive to heat sink absorption, the more obvious the heat dissipation effect.(It may also be almost unaffected. If the indoor heat dissipation is insufficient, the low temperature refrigerant will reduce the working burden of the compressor .)

4. Used with a fan

As mentioned above, people feel cool. One is the ambient temperature and humidity, and the other is the air flow. For example, the temperature in the room is about 28 ℃, and it feels a bit hot. If you can blow a fan at this time, it will feel cooler, even if you don't move there, it will be a bit cooler. That is to say,Let the flow of air help you emit heat faster. In addition, the fan is preferred for cooling of air conditioners.

If you pay attention to it, you should note that the power of the fan is relativeOutdoor Unit of the air conditionerFor example, none of the headers can be reached. (Usually dozens of Watts)

5. Others unrelated to Air Conditioners

Currently, you can think of the following points:

• Avoid sunlight: If trees are outside, the room will surely be much cooler. (The mountains and tigers are full of walls? Haha, what about multiple functions ~)
• Reduce air circulation and outdoor air circulation: It is good to keep the low-temperature air in the room honestly. (Take note of the ventilation)
• Pay attention to the wall and glass: All things will heat conduction, and the walls and doors and windows of the house are always balancing the temperature difference between the room and the outside, the heat dissipation efficiency of ordinary glass is much higher than that of walls. Double Glass is a good choice, and double windows are also good. Of course, there is a balcony and the balcony door is closed, the same effect can be achieved.
• Pull the curtain: reduce sunlight into the house, but also reduce other forms of heat radiation into the house, and the space between the curtain and the window, is also a good temperature buffer. The large double floor-to-ceiling windows always have some effect, and the layer on the outside is white and better.
• Electric Appliances with less heat dissipation are always good, especially for cooking. Compared with natural gas stoves and electric furnaces, the Induction Cooker is better and the microwave oven is better. At the same time, it should be noted that the smoke hood will also take out the indoor cooling air.
• Others: What else? You can add ~

Many of these contents have a fatal impact. If you want to save energy, pay more attention to them.

4. Irrelevant cooling and related warming

Now, summer is over, and winter is over. Just outside, the snow float ............

In winter, there are more options for heating equipment, such as heating lights, heating fans, and heaters. Oh, by the way, there are air conditioners.

Which of the following is power-saving?

Obviously, the power used for heating lights is not 100% converted into thermal energy, with a certain proportion of light. air conditioners are even worse, and how much energy is wasted on the mechanical operation of compressors, and refrigerant transmission, even worse; the highest must be an electric heater, almost 100% of the power is converted into heat.

It's that simple.

Yes? Well, borrow the example of the above pool (not appropriate ):

The current situation is: equivalent to the pool A in the house, equivalent to the outdoor pool B, the water level of A is low, but the water level of B is lower, a's water level cannot be raised by the natural flow of water. Use a water pump, right. Wait, isn't the efficiency of the pumping machine 100%? Well, we can use close to 100%. We use hydrogen and oxygen to make water ~ Well, we have made hydrogen and oxygen and synthesized water by some means. Expensive?

Well, what's the problem? Oh, sorry, I forgot to mention an important indicator of the air conditioner --Performance-to-Performance Ratio.

The performance ratio of air conditioners must be greater than 1. That is to say, with a power of 1kW/h, a refrigerating capacity greater than 1kW/h will be generated ). At present, the air-conditioning performance ratio is mostly 3.0 +. Oh, my God! Isn't this a violation of conservation of energy? How can this problem be achieved?

Oh, let's review the working principle of the air conditioner. The purpose of the air conditioner itself is not to make heat (cold volume? Joke), transfer heat. The heat in the house is carried out in summer, and the outdoor heat is carried in winter because of the need for energy.We moved the energy from the low-energy side to the high-energy side. The air conditioner is just a porter. The energy consumption of air conditioners is the energy consumption for handling.The compressor efficiency must be less than 1. So, don't forget,Air conditioners are used, and outdoor environments are victims.

Vividly speaking, tank trucks transport fuel for one vehicle and consume fuel for themselves. The fuel consumption ratio is the energy efficiency ratio.

That is to say,If the outdoor temperature is not too low, the heating efficiency of the air conditioner is definitely higher than the direct heating efficiency.

That's all.

Ending split line

PS1: The first time I wrote such an article, there are many problems.

PS2: The first time I tried HTML-level formatting, I'm exhausted ......

PS3: the typographical style is piratedMaybe.(Access requires technical means ).

PS4: The reference content is the results of Google. I cannot remember them. I will pay attention to them in the future ......

Ps5: Really time-consuming ......

Ps6: No ......