Some air conditioner manufacturers say that air conditioners only consume one kilowatt hour of electricity per night. Fake

Some air conditioner manufacturers say that air conditioners only consume one kilowatt hour of electricity per night.

The electricity price in most cities in China is basically only about 70 to 80 cents. The power saving is so great that it is simply outrageous.

The kilowatt-hours on the energy consumption sign posted on the air conditioner is what we commonly call one kilowatt hour of electricity. A one-horsepower air conditioner has a cooling capacity of 2600W, level 3 energy efficiency, and a cooling input power of 790 watts. This air conditioner consumes approximately 0.79 kilowatt-hours of electricity for one hour of operation.

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If that night is calculated as 8 hours, it will consume 6.3 kilowatt-hours of electricity, even if I can make some compromises. It is not always cooling. If the cooling is stopped for 10 minutes and stopped for 10 minutes, 3.1 kilowatt-hours of electricity will be consumed that night. To ensure the approximate usage pattern of one kilowatt-hour of electricity per night, it should be that there are only 10 minutes of cooling in an hour and the remaining 50 minutes. closed state.

From this point of view, it is unlikely that one kilowatt hour of electricity per night is possible.

If you carefully examine the promotion of one kilowatt-hour of electricity per night, you will find that it also needs to meet three prerequisites at the same time.

The first is to turn on the energy-saving mode of the air conditioner, and the second is to set the temperature of the air conditioner to 26 degrees Celsius. The third most critical thing is that the outdoor temperature cannot exceed 28 degrees Celsius, and it must be in a very small room.

So let’s assume that a small room has only one exterior wall and one small window. When the outdoor temperature is 28 degrees Celsius, there are no other electrical appliances in use in the room, and there is only one person, who must be sleeping. The humidity of the air should be lower than 30%.

In such an environment, it is really possible to consume only one kilowatt hour of electricity for 8 hours, but such usage scenarios do not exist in reality.

However, some people really took it seriously and tested the air conditioner at the Institute of Metrology. Take a look at how much energy the air conditioner consumes for cooling under different conditions?

The general situation is this: In a normal building, there is a bedroom with one person sleeping in it, and the outdoor temperature is set at 30 degrees Celsius. Set the indoor temperature to 30 degrees Celsius, which is more realistic. Under such cooling conditions, at least two kilowatt hours of electricity are used a night, and the air conditioner used is an inverter air conditioner that costs close to 5,000 yuan per horsepower.

When the outdoor temperature is 28 degrees, it is actually not hot. It is already very comfortable to sleep with the window open. And the air humidity in summer is mostly around 75%.

In addition, in a small room like this, a person will exhale more moisture when sleeping, causing the air humidity to continue to increase. The heat generated by a person when he is calm is equivalent to a 70-watt heat source. Just to offset the 70 watts of heat, 0.56 degrees of electricity has been consumed in 8 hours, leaving only 0.44 degrees. Therefore, under normal circumstances, it is really impossible to generate electricity per night.

However, the refrigerator we use daily can really be left on 24 hours a day and only consumes one kilowatt hour of electricity.

That is because it has a thick insulation layer. As long as we can achieve absolute thermal insulation, even if it only provides extremely low cooling power, just like the slogan says it only consumes one kilowatt hour of electricity a month, this is possible.

In the same way, imagine that your home faces north and has a large living room of 80 square meters. During the decoration, part of the exterior wall was specially knocked off and a large floor-to-ceiling window was built.

This living room is like a warm vegetable greenhouse in the summer. A 4-horsepower standing air conditioner is definitely too much, so I can only find a way to buy that kind of heat-insulating glass.

So compared to the TV promotion every night, it is very successful from the perspective of advertising.

So among so many air conditioner brands, I only remember this sentence until now.

Now that we have figured out the exaggerated elements in advertising, we also understand how much exaggeration it is. In this way, when buying an air conditioner, we can know it in our mind.