From the perspective of horsepower and energy efficiency ratio, central air conditioners should be selected like this!

From the perspective of horsepower and energy efficiency ratio, central air conditioners should be selected like this!

The choice of central air conditioner for decoration has become a market trend. How to choose a suitable central air conditioner, choose a duct machine or a multi-line group? Does the higher the energy efficiency ratio save electricity? Cooler tells you how to buy central air conditioners, what is the horsepower and energy efficiency ratio?

Central Air Conditioning: Duct Machine VS Multi-line

　　The duct machine is a one-for-one format. One host is equipped with one indoor unit, and the number of installations can be selected according to needs. The air duct machine has a large air outlet and higher distance from the ground, which is more comfortable and cost-effective than split machines. The air duct machine is affordable and belongs to the "civilian machine" in the central air conditioner, suitable for ordinary families.

　　 Multi-line is a one-to-N, one outdoor host with multiple indoor units. The use of DC frequency conversion technology is more energy-efficient and avoids affecting the overall appearance of the house. In addition, an outdoor unit is also convenient for after-sales management such as maintenance and repair. Compared with the applicable models of the same area air duct machine, the price of multi-line group is slightly higher. Two important reference indicators when purchasing an air conditioner are the cooling capacity and energy efficiency ratio of the air conditioner.

　　 air duct machine and multi-line are hidden in the ceiling, which saves space and does not damage the overall decoration effect of the room. It is more fashionable and beautiful than split air conditioners! Regardless of whether it is a duct machine or a multi-line, there is little difference in appearance, and each has its own merits. However, the copper pipe of the air duct machine is taken separately, and the ceiling will increase accordingly, and the copper pipe of the multi-connection is one to the end, which is taken according to the ceiling situation.

　　Knowledge point 1: The relationship between the number of horses and the indoor area

The horsepower of the air conditioner refers to the cooling capacity of the air conditioner. The horsepower of the air conditioner is about two thousand five hundred watts for one horse, and this wattage is suitable for use in a room of 12 square meters, and the two horses are Five kilowatts, suitable for a house of about 25 square meters.

　　 General households can calculate the cooling capacity of the air conditioner based on the size of the room and the sealing and heat preservation conditions, floor, orientation, height and other factors, and the cooling capacity per square meter is 150~220W. Generally speaking, the cooling capacity of 1 horse is roughly 2324W.

　　 How to choose the number of air conditioners and the corresponding area?

　　 The number of air conditioners on the market has a great relationship with the cooling area of ​​the air conditioner. Under normal circumstances, the cooling capacity of 1 horse is about 2 kilocalories, which means that 2 kilocalories multiplied by 1.162 equals 2324w.

　　Using Normally, the cooling capacity required per square meter for an ordinary family bedroom is 115~145W, and the cooling capacity required per square meter for the living room and dining room is 145~175W. If the room is well insulated and sealed, it can take a small value if it does not face the sun. On the contrary, take a large value. When the floor height is higher, it should be increased appropriately.

　　 bedroom

　　15㎡: 130*15=1950 (W), because there is no air conditioner with corresponding cooling capacity, choose 1 horse nearby;

　　25㎡: 130*25=3250(W), choose 1.5 horses.

living room

　　30㎡: 160*30=4800(W), choose 2 horses;

　　40㎡: 160*40=6400(W), choose 2.5 horses;

　　45㎡: 160*45=7200(W), choose 3 horses.

　　Knowledge point 2: Energy efficiency labeling of air conditioners

　　 The energy efficiency ratio (EER) of the air conditioner represents the cooling capacity per unit power of the air conditioner. The higher the EER value, the more heat is absorbed by the air conditioner or the compressor consumes less electricity, that is, the less electricity is spent to get a cooler effect.

　　 Many consumers think that split air conditioners are more economical and energy-efficient. In fact, there is a misunderstanding. In terms of energy efficiency ratio, the energy efficiency ratio of central air conditioners is often higher and more energy-efficient than split air conditioners. The energy efficiency ratio of general household split air conditioners is around 2.3~3.6, while the central air conditioner can reach above 6.0, which far exceeds the level of ordinary air conditioners such as cabinet type and split type. Simply put, when the cooling capacity is the same, the use of central air conditioners is more energy-efficient than split air conditioners. Take Hitachi's central air conditioner as an example. Its IPLV (ie, the comprehensive energy efficiency ratio of a single chiller under standard operating conditions under partial load operation) is as high as 6.35, which shows the energy saving effect.

　　Knowledge point 3: Principle of power saving of inverter air conditioner

Compared with the fixed frequency central air conditioner, the frequency conversion central air conditioner has a faster cooling speed. The frequency conversion air conditioner is put into operation at a higher frequency and power, and reaches the set temperature in a short time (usually 1/2 of the fixed frequency air conditioner). Adjust to low frequency operation.

The compressor of inverter air conditioner does not turn on frequently, maintains a stable working condition, has low noise, and has a longer service life, and long-term low-speed operation of the inverter air conditioner can save power consumption and save energy by 10%-45% than ordinary air conditioners.

　　The central air conditioner can be installed hidden, saving indoor space area; stable performance, humanized air outlet design ensures uniform indoor temperature distribution and more comfortable body feeling. Household central air conditioners have high comprehensive energy efficiency ratio, high efficiency and energy saving, and will surely lead the trend of future home decoration!