I want to change an energy-saving air conditioner recently. Do you have any good recommendations? Who can talk about it?

This is the170th article by the home yeast division.

In the hot summer, it's too hot to die. Everyone depends on air conditioning to "extend life". For the southern region without heating, air conditioning can also give people warmth in winter.

So Andy has always been curious about how ancient people survived without air conditioning.

Air conditioning is a routine product of many families, so what is the knowledge about the choice of air conditioning? Andy will share it today ~

How can air conditioning be cold?

Some people will find that the air conditioner at home is not very cold sometimes. Maybe you were hit at one of the following points.

1, the ceiling should not block the air inlet.

The operation mode of air conditioner is probably:

The air conditioner blows out cold air → the cold air is mixed with indoor air, and the hot air rises → the hot air is sucked in by the air return port, and then cooled → the air outlet continues to blow out cold air (continuously circulating until it reaches the set temperature).

If the return air space is insufficient, or there is a shelter at the air outlet, such as the ceiling, then the cold air just blown out can be sucked in by the return air quickly, making the body mistakenly think that the indoor temperature has dropped low enough and will not send out cold air again.

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Therefore, there should be enough space in front and above the air conditioner, at least 5cm away from the ceiling and at least 45cm away from the ceiling (preferably nothing), so as to ensure the effect of return air and facilitate the disassembly and cleaning of the filter screen in the future.

2. It should be installed on the long side wall.

When installing air conditioners, many decorators see which wall is close to the outdoor unit and where the cables are convenient. In fact, it should be installed on the long side wall (the middle position is better) to cool the space in a shorter time and save more electricity.

If it is installed on the short side, the space is easy to be half hot and half cold, especially in the long and narrow space.

Take chestnuts for example. Suppose the set temperature is 27℃, the living room has reached this temperature, but the dining room is still 3 1℃. Because the air conditioner can't feel the hot air in the restaurant, it will automatically determine that the indoor temperature has reached 27℃ and slow down the running speed, which will naturally make people feel cold.

Of course, in theory, other factors should be considered when installing, such as whether the wind will blow people and whether the length of copper pipes needed will exceed the length of free installation (generally, the hanging machine is 3m, and the cabinet machine is 4m).

If the space is not large, the air conditioner can still cool down with a little effort, but if it is a large space (especially a long space), it needs careful consideration.

3. The closer the indoor unit is to the outdoor unit, the better.

The shorter the distance between the indoor unit and the outdoor unit, the less turns in the middle of the pipeline, and the better the refrigeration effect will be. It's better to be within 3m, 5m is ok, and it's better not to exceed 10m.

Copper tube is used to connect indoor unit and outdoor unit and transport refrigerant. If the copper tube is crushed, it is easy to cause the air conditioner not to be cold. If the bending degree of copper tube is not serious, you can ask a professional company to repair it. If it cannot be repaired, it can only be replaced.

4, outdoor cooling space should be enough.

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The outdoor unit should not only reserve a certain space above and in front of the indoor unit, but also have heat dissipation space.

It is better to be more than 50cm away from the wall, because the heat dissipation and ventilation are not good, the compressor efficiency will become lower when the air conditioner is running, which will affect the refrigeration effect and increase the power consumption.

5. Choose the right number of people.

The number of air conditioners indicates the cooling capacity, which is generally considered from the aspects of floor height, room size, orientation and floor.

* If it is a family in the west or on the top floor, it is best to add 0.5~ 1 horse. (The above picture is for reference only)

Household air conditioners are mainly divided into hanging machines and cabinets. Generally, 1.5 horses and below shall be hung up, and more than 2 horses shall be used in the cabinet.

On Constant Frequency and Frequency Conversion

Frequency conversion air conditioner is to add a frequency converter which can be used to adjust the running speed of compressor on the basis of fixed frequency air conditioner, so that the cooling capacity or heating capacity of air conditioner can be changed, the temperature control is more accurate and the noise is less.

Therefore, the price and maintenance cost of inverter air conditioner will be higher than that of fixed frequency air conditioner.

In addition, some businesses use frequency conversion to attract consumers with more energy-saving gimmicks than fixed frequency, but Andy wants to say that it doesn't necessarily depend on the specific situation.

At the beginning of operation, because the indoor temperature does not reach the set value, the inverter air conditioner will run at the maximum power (this process is also quite power-consuming), and will slow down after reaching the set value, so the power consumption has high and low values;

When the fixed frequency compressor reaches the set temperature, it will turn off the compressor, and the power consumption will be lower than that of the variable frequency compressor.

Only when the set temperature is not much different from the indoor temperature, and the service time is more than 6 hours, the inverter air conditioner can achieve the effect of saving electricity.

Ps: Because the compressor of constant frequency air conditioner will generate a great instantaneous current when it starts and stops, frequent start and stop will do some harm to the life of the compressor.

Central air conditioning and ordinary air conditioning

Let's take a look at the comparison between the two.

Andy's advice on what to buy is:

For families with few rooms, few households, or no plans to make suspended ceilings and a small budget (installing 1-4 air conditioners), the installation layout of split machines and cabinets can be considered;

On the contrary, families with large space, many rooms or more attention to decoration can consider central air conditioning, which is more cost-effective

Other places that need attention.

1, the electric fan is definitely a good helper to make the indoor cold air distribute more evenly and cool down faster.

2, once again remind, air conditioning is best not to blow directly at people, which is easy to cause migraine or rheumatism.

After the air conditioner is installed, test it first to see if the refrigerant is leaking or not cold enough. At this time, if there is a problem, it is more convenient to maintain it.

4. If the air conditioner is installed on the light steel wall, a 18mm multi-layer board should be added after hanging, because the sealing boards on both sides of the light steel wall are mostly gypsum boards, and the bearing capacity is not enough, so the air conditioner may fall down.