Friends who are satisfied with the air conditioner at home and are fully installed can skip to the last two sections of the article, expecting you to gain new skills in saving money and maintaining air conditioners!
First, the basic knowledge about air conditioning (newcomers must see)
Basic working principle of air conditioning
Refrigeration (heating) principle: Gas refrigerant is pressurized by compressor to become high temperature and high pressure gas, which enters the condenser of outdoor unit (indoor unit), condenses, liquefies and releases heat to become liquid, and releases heat to the atmosphere (indoor unit) at the same time. After the liquid refrigerant is decompressed by the throttling device, it enters the evaporator of the indoor unit (outdoor unit), evaporates, gasifies, absorbs heat, becomes gas, and absorbs the heat of indoor (outdoor) air at the same time, thus achieving the purpose of reducing (increasing) the indoor temperature. The refrigerant turned into gas enters the compressor again and starts the next cycle.
Interpretation of air-conditioning commodity number
I believe that when many people buy air conditioners, it is very confusing to see a row of alphanumeric combinations behind the air conditioner product number. In fact, this string of characters has shown a lot of information, but it can be deciphered with a password.
Send the password book and take it:
The model looks complicated, but it looks good when taken apart.
Take a chestnut "kfr-35gw/bpeya1+1"and open it:
K stands for air conditioning, F stands for split air conditioning, R stands for heat pump type, 35 stands for refrigeration capacity of 3500W, G stands for wall-mounted indoor unit, W stands for outdoor unit, Bp stands for frequency conversion, and other symbols should be the code names of this brand series.
Is it not too difficult to interpret the wall-mounted split cold and warm frequency conversion air conditioner as 3600W W cooling capacity? You can also find any air conditioner model and test it yourself.
Second, the main parameters of purchasing air conditioners
Frequency conversion and fixed frequency
Take refrigeration in summer as an example.
The principle of constant frequency air conditioning is to adjust the indoor temperature through switches. When the temperature reaches the set value, the host will automatically shut down. The indoor low temperature will gradually rise due to the influence of the environment, and the air conditioner will automatically turn on again after rising for a period of time.
The principle of variable frequency air conditioning is that when the indoor temperature reaches the set temperature, the main engine automatically switches to low speed operation, thus keeping the indoor temperature at the set value.
The difference between the two principles is generally reflected in the price. The price of the same series of inverter air conditioners is generally higher than that of fixed-frequency air conditioners, but the energy consumption of the same number of people is generally much less than that of fixed-frequency air conditioners.
Energy efficiency index
At present, the new energy efficiency grades are divided into 1, 2 and 3.
In a word, 1 grade has the best energy-saving effect, grade 2 has a certain energy-saving effect, and grade 3 is the lowest level of product standards.
The lower the energy consumption, the more conducive to energy conservation and environmental protection. When choosing air conditioners, it is recommended that you give priority to household appliances that are more energy-saving and environmentally friendly.
Air conditioning capacity
The number of air conditioners refers to the input power of air conditioner pressing line, fan motor and electronic control part. Generally speaking, the number of people who buy air conditioners can be determined according to the indoor space where air conditioners are installed, as shown in the following table:
The number of air conditioners should be selected according to the size of the space. For example, if the indoor room is 20 square meters, you can buy air conditioners of 1.5 or above, and 1.5 is the most suitable air conditioner. If there are too many passengers, the cost of buying air conditioners will increase accordingly, increasing expenses; Too few people, like a small horse-drawn cart.
refrigerating output
Refrigeration capacity refers to the total heat taken away from the enclosed space, room or area in unit time when the air-conditioned refrigerator is running. In short, the maximum indoor cooling rate is directly proportional to the cooling capacity. If you want to quickly cool down indoors, it is more appropriate to choose an air conditioner with a relatively large refrigeration capacity.
Third, the use of air conditioning to save money tips
1. The air conditioning temperature should not be too low in summer. The most suitable room temperature in summer is 26℃, and the temperature difference between indoor and outdoor should not exceed 10℃ to prevent physical discomfort caused by going out. At the same time, the ambient temperature is around 26℃, which is what the human body needs. From the perspective of energy saving and emission reduction, the air conditioning temperature of 26℃ is the most economical!
2. The power consumption of air conditioner is mainly the power consumption of compressor. As long as the air conditioner is turned on for refrigeration, the compressor will start working. Whether the air conditioner is set at 1 or 10, whether it is 18℃ or 28℃, the power consumption of the compressor is the same when the expected temperature is not reached. Therefore, the most economical way to use the air conditioner is to quickly cool down to 26℃ at the maximum wind speed and the minimum temperature, and then turn the air conditioner back to a small wind and maintain it at 26℃;
3. The use of air conditioning can't be switched on and off frequently. Frequent switching of air conditioners leads to frequent starting of the compressor, which consumes the most electricity and damages the compressor to some extent. Generally, air conditioners are related to machine delay devices, and the delay is about 3 minutes. It can be turned on immediately after shutdown, but it takes 3 minutes for normal operation. For air conditioners without delay, it is not allowed to start immediately after shutdown, and it is necessary to wait for 3 minutes before restarting the air conditioner, otherwise it may lead to excessive starting current, blown fuse and even burned compressor motor;
4. General air conditioners have preset energy saving. After the air conditioner is turned off, it will continue to blow for a period of time until the generated cold air (warm air) is blown out. Therefore, when you go out at a certain time, you can turn off the air conditioner about 5 minutes in advance;
If you want to cool the air conditioner in summer, you'd better let the wind face upwards, but it's the opposite in winter. Make full use of the physical characteristics of cold air flowing downwards and hot air flowing upwards to make the air communicate naturally;
6. When the cabinet air conditioner is used and placed, it is necessary to ensure that there are no sundries in the air inlet and outlet, such as sofas, curtains and cabinets. Otherwise, it will affect the cooling effect and become power-consuming;
7. Regularly clean the air-conditioning filter screen and radiator to prevent dirt from adhering. The adhesion of dirt will reduce the efficiency of air outlet and heat dissipation, and increase the power consumption of air conditioner in the same phase.
Four, the daily maintenance and maintenance of air conditioning
Proper maintenance of air conditioners is conducive to prolonging their service life, saving electricity and reducing maintenance costs, so it is necessary to carry out routine maintenance work regularly.
Daily maintenance of air conditioner
1. Clean the air filter frequently, usually once every 2 ~ 3 weeks. The specific steps are as follows:
(1) Disconnect the power supply, open the panel and take out the air filter;
(2) Clean the air filter. Clean the air filter under tap water. Because the filter element is made of plastic frame and polyester yarn, it cannot be cleaned with hot water above 40℃ to prevent the filter element from shrinking and deforming.
(3) After cleaning, drain the water on the filter screen, do not expose to the sun, insert the air conditioner, and close the panel.
2. Always clean the outer surface of the indoor air conditioner;
Please be sure to clean the internal radiator of the air conditioner.
Some air conditioners have self-cleaning function. The principle is roughly to use the condensed water droplets on the evaporator to dissolve the dust in water and then flush it into the drainage pipe. Let the dirty water be discharged outdoors, and then dry the evaporator to prevent the growth of bacteria.
For air conditioners without self-cleaning function, it is best to manually clean them regularly. The specific steps are as follows:
(1) Disconnect the power supply, open the panel, pull out the air filter, and expose the heat sink;
(2) Use reliable brand air conditioner cleaner to spray evenly on the heat sink. If there is too much dirt, wipe it off with a wet rag or clean it with a little water;
(3) Replace the air filter, close the panel and let it stand for 10 minute;
(4) Turn on the air conditioner, and the sewage will be automatically discharged from the drainage pipe.
Start-up and maintenance of air conditioner after long-term non-use
As far as the north is concerned, air conditioners usually turn off and stop using after they start heating at the end of 10, and will not be used again until April and May of the following year, and the intermediate stop time is as long as 5-6 months.
After shutdown, do a good job of maintenance and cleaning, and cover the air conditioner. Be sure to do a comprehensive inspection before re-enabling, and conduct maintenance and cleaning again if necessary. For those who live in the building, please leave the cleaning and maintenance of the outdoor unit to professionals. If you disassemble the main mechanical parts of the air conditioner yourself, the warranty may be affected.
Other warm tips
1. Don't blow the air conditioner outlet at people for a long time, or you will catch a cold and get sick;
2. The air conditioning temperature should not be too low in summer, and the indoor and outdoor temperature difference should not exceed 10℃ to prevent physical discomfort caused by going out;
3. Pay attention to the little friends with babies at home! The most suitable temperature of the air-conditioned room where the baby is located is 28℃, but it should be noted that the baby's temperature regulation function is not perfect and it is easier to change with the environment. It is best not to let the baby rely too much on air conditioning!
In fact, the selection and maintenance of air conditioners is not difficult. After reading several key factors in choosing air conditioners, you can easily determine which one to buy and what maintenance work you need to do.
Welcome friends to discuss those things about the purchase and maintenance of air conditioners!
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