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Does central air conditioner consume more electricity than ordinary air conditioner?

Does central air conditioner consume more electricity than ordinary air conditioner?

2022-09-26

With the continuous upgrading of people's consumption levels, people have higher and higher requirements for the comfort of their living environment. In order to create a comfortable home environment for their families, more and more users use household central air-conditioning. Now the central air conditioner has taken off the "noble" hat, and ordinary families can also afford to buy and use it. However, there are also many users who are very worried about the electric charge of the central air conditioner and have the mentality of "affordability, not affordability". Are central air conditioners really more power-consuming than ordinary air conditioners?

Technical Advantages of Central Air Conditioning

The energy efficiency ratio is one of the indicators to measure the power consumption of air conditioners. The energy efficiency ratio of central air conditioners is generally higher than that of ordinary air conditioners. Central air conditioners pay more attention to frequency conversion technology in terms of compressor technology (indoor units also have frequency conversion). When air conditioners are running, outdoor units output cooling capacity and heat according to the actual needs of indoor units, and adjust the actual output power of outdoor units through the change of compression speed, so as to achieve the matching of indoor cooling capacity and heat load. Central air conditioners are not always in the state of the full load operation.

When the temperature difference between inside and outside the room is relatively large, when the central air conditioner has just been turned on, the outdoor opportunities will operate at high frequency with high power, so that the room can quickly reach the set temperature. In a short time, the power consumption is relatively large. However, after working for a period of time, the room temperature will enter a constant temperature state. At this time, the compressor will enter a variable-frequency low-speed operation mode, and the power consumption will also be reduced to the minimum while keeping the indoor temperature constant. Under the same power, Variable frequency air conditioners save more power than constant frequency air conditioners.

Mistaken Ideas of Central Air Conditioning Power Consumption

Many people understand that an indoor unit of the central air conditioner should be operated at full load, so they worry that the electric charge of the central air conditioner will be very high. In fact, the central air conditioner has a minimum output power of 15% - 30% (different brands of central air conditioners have differences), so there is no need to worry about the high load operation of the central air conditioner caused by only one indoor unit. Moreover, each indoor unit of the central air conditioner can be adjusted and operated independently. The air conditioners in each space can operate without interfering with each other. The outdoor unit matches the best power output with the opening state of the indoor unit.

In terms of initial investment, the central air conditioner is higher than the ordinary split air conditioner. However, in households where the air conditioner is used frequently, the number of indoor units of the central air conditioner is large and the use frequency is high. When the number of indoor units is large, the energy consumption of the central air conditioner is far lower than that of many ordinary split air conditioners. In the long run, the use cost of the central air conditioner will be lower.

Common energy-saving methods of central air-conditioning

Set reasonable temperature

All air conditioners have temperature setting intervals, usually between 16 ℃ and 30 ℃. If the difference between the indoor set temperature and the ambient temperature is greater, the energy consumption of the air conditioner will be greater, and the comfort of the human body will also be affected. In summer, the air conditioner is generally set between 26 ℃ and 28 ℃. At this time, the temperature difference between the air conditioner and the ambient temperature is small, and the comfort of the human body is relatively high. If the temperature is set lower, the energy consumption will increase when the temperature difference with the ambient temperature increases. Of course, the comfort of the human body will decrease when the temperature is set to 30 ℃. In winter, the air conditioner is generally set between 18 ℃ and 22 ℃. At this time, the temperature difference between the temperature and the ambient temperature is small, and the comfort of the human body can be guaranteed. If the temperature is set higher, the energy consumption will increase when the temperature difference with the ambient temperature becomes larger, because the energy consumption needs to increase by 5% - 15% for every 1 ℃ rise in temperature, and the heating capacity of the air conditioner will be affected when the temperature difference is set higher.

Select the right model of air conditioner

There are many types of outdoor units and indoor units of the central air conditioner, but the power cannot be too large or too small. If the power is too large, the effect of the air conditioner will be better. The energy consumption of the air conditioner will become higher when the horse pulls the car, and the initial purchase cost will also increase; If the power is too small, the effect of the air conditioner will become worse. The small horse pulling the cart will make the air conditioner unable to achieve the effect and continue to work, resulting in excessive energy consumption of the air conditioner. Only by selecting the correct air conditioner power model, the air conditioner can not only play a high efficiency but also save energy in use.

Good usage habits

Each indoor unit of air conditioner has a control system, which can be switched on and off independently. However, the air conditioner must not be turned on and off in the process of use. It seems that there is no power consumption after the air conditioner is turned off, which has the effect of saving energy. However, the short shutdown time of the air conditioner leads to a large change in the heat of the room. When the air conditioner is turned on again, it requires longer time and more output power to restore the temperature effect of the room. Such frequent starting not only does not have the effect of saving electricity and energy, Instead, it consumes more energy. Of course, the air conditioner can be turned on and off at the same time. If there is no one in the room for a long time, you still need to turn off the air conditioner to save electricity.

Do a good job of building thermal insulation

The air conditioner is usually used in a relatively closed space, which can ensure the air conditioning effect of the room on the one hand and can be more energy-saving on the other hand. When the air conditioner is turned on in the room, the air in the room will slowly be affected by the air conditioner rising and cooling down. At this time, if the window is opened, the indoor cold air and hot air will be affected by the outdoor air temperature, which will lead to a large indoor temperature fluctuation, resulting in a poor air conditioning effect. In addition, the airtightness of the room will also lead to the poor use effect of the air conditioner. If the quality of the glass used is poor, and the gap between the doors and windows is too large, it will lead to the poor thermal insulation of the building and increase the energy consumption of the air conditioner.

Summary

To sum up, the energy efficiency ratio of the central air conditioner is very high. With the support of frequency conversion technology, it has room for independent control and controllable starting power. Under the same housing conditions and the same operating time, the power consumption of the central air conditioner is not higher than that of the ordinary split air conditioner. Moreover, the central air conditioner has the advantages of high comfort, good aesthetics, low noise value, stable system, low failure rate, and long service life. The central air conditioner is not the "electric tiger" that everyone imagines. In order to achieve a better energy-saving effect, the central air conditioner should set a reasonable temperature, select the right model, maintain good use habits, and do a good job of building thermal insulation.

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