It's the first time to buy an air conditioner. What should I pay attention to when buying air conditioners? I don't know. How to buy it?

It's hot, and everyone is thinking about buying air conditioners. Here, I would like to share with you some precautions before buying, and then add: 1. Floor location: whether it is on the top floor (if it is on the top floor, it will be easy to absorb sunlight in summer). PS: If you choose the air conditioner on the top floor, you should choose a bigger one on the original basis. Two: room layout: whether the window is directly illuminated by solar energy in the afternoon (solar heat, ultraviolet light in the afternoon). Are there many indoor corners? PS: If it is exposed to the sun and there are too many corners, you should also choose a bigger one. Three: people: how many people are there in the family, more children or more old people? PS: It mainly analyzes the flow of people at home. Air conditioning, refrigeration and heating need to be considered when the flow of people is large. 4: Air-conditioning usable area (popular version):12m2 = small 1 (23 machines)16m2 = 1 (25, 26 machines) within 20-23m2 =1.5ma (. Within 40-50 square meters =3 horses (70 is suitable for users with simple conditions, such as five: how to choose air conditioners: choose air conditioners that are larger than the small ones (the big error here is about half a p, which is equivalent to 12 square meters). I needed to buy a smaller 1P, but I lived on the top floor. Then I should at least buy1p. In addition, the factors that affect the required cooling capacity of a room include not only the size of the room, but also the orientation of doors and windows, external walls, the number of people living, electrical equipment and so on. Six: air conditioning accessories: pipeline: the original packaging of air conditioning hanging machine is about 3 meters, and the cabinet machine is about 4 meters. (There is one meter more pipeline in mitsubishi electric, that is, 4 meters for hanging machine and 5 meters for cabinet machine). Bracket: At present, there is no bracket for manufacturers to distribute goods, some are distributed in small shops, and sometimes supermarkets need to spend money to buy them. (The original in mitsubishi electric includes the original bracket, and individual models of Haier include the bracket). Seven: Air conditioning installation conditions are usually very important. Air conditioning is a semi-finished product, and some conditions need to be paid extra. Three points for quality and seven points for installation. Therefore, understanding the installation conditions of air conditioners will also save a lot of time and reduce unnecessary troubles when we buy. 1. bracket (except for some models of Mitsubishi and Haier): If your community has air-conditioned spaces, you don't need brackets. If you need to hang an external machine on the wall, you need to buy it. Depending on the situation, holidays will also be limited distribution. 2. Pipes: You have to buy all the pipes except the original packaging. 3. Installation of outdoor unit: Whether the outdoor unit can go out from this floor. Some friends have anti-theft nets hanging on their windows, which are welded to death, so the outdoor machine can't be taken out, so they need to lift the machine from upstairs. Causing crane fees. 4. Wall hole: As far as we know, there is no free one-time hole-forming (that is, professional punching machine). It's all made of free impact drills. This is very important. More than two cabinets have been pulled out. These are some basic things of air conditioning, and some things still depend on personal preferences. I'm so tired, I'm going to eat! Remind consumers to pay attention to the following matters when purchasing and using air-conditioning products, and try to solve disputes as little as possible. Tip 1: Avoid the rush hour. The peak consumption of air conditioners is mainly concentrated in July and August, during which businesses are often in a passive working state. Compared with strong sales, transport vehicles and installers are far from satisfied, which easily leads to untimely installation and lagging after-sales service. Consumers are advised to avoid the peak purchase period as much as possible and make preparations early. Tip 2: Avoid conceptual confusion and pursue new products in the fashionable air-conditioning market. Health air conditioning has various concepts such as photocatalyst, cold catalyst, oxygen bar, negative ion and nanometer. It is understood that all "healthy air conditioners" have not passed the testing of national authorities except light wave air conditioners, and various concepts and functions promoted by manufacturers are also lacking in moisture. When purchasing, consumers should comprehensively consider the cost performance of products, and can't spend money to buy back a bunch of "fancy" functions in pursuit of fashion. Tip 3: Check the cooling capacity of three important performance indicators: it is an important basis for consumers to buy air-conditioning products, and the cooling capacity is too small to achieve the predetermined cooling effect; Excessive cooling capacity will cause waste of resources. According to the national standard, the measured value of refrigeration capacity should not be less than 95% of the rated value. Energy efficiency ratio: refers to the ratio of cooling capacity to effective input power of air conditioner during refrigeration operation. This value reflects the energy-saving situation of air-conditioning products. The greater the energy efficiency ratio, the smaller the power consumption, and the less the power consumption. Noise: Noise generated by air conditioning operation. Excessive noise will seriously affect consumers' lives. Tip 4: Check the certification mark. At present, there are two kinds of compulsory certification marks for air-conditioning products: one is "3C mark", which is issued by CNCA; The second is "energy efficiency label", which contains five levels of energy efficiency ratio * * *, with the highest being 1 level and the lowest being 5 levels. Consumers should pay attention to these two signs when purchasing air conditioners, and should not be influenced by other certifications. Tip 5: Install the air conditioner according to the instructions. There are corresponding technical specifications. Consumers must not choose the installation location or replace accessories at will in pursuit of environmental beautification. Before installation, check whether your power supply, voltage and leakage protector can meet the requirements, and try to avoid places where flammable gas leaks, artificial strong electricity and magnetic fields directly act. After installation, check carefully. Finally, the trial operation is carried out according to the requirements of the instruction manual. Tip 6: Adjust the set temperature of air conditioner correctly. At ordinary times, in the state of rest, sleep and other less activities, the room temperature is around 25℃, and the human body feels comfortable. Setting the temperature too low will not only make people feel cold, but also easily lead to frequent start and stop of the compressor and shorten the service life of the air conditioner. Tip 7: cleaning and checking the air conditioner regularly and removing the filter screen of the indoor unit regularly can effectively improve the dust removal effect of the air conditioner and improve the ambient air quality. Regular cleaning of outdoor heat sink can effectively improve its heat transfer coefficient and efficiency, and improve the working efficiency of air conditioning. Regular inspection of the air conditioner by professionals, timely replacement of aging parts and replenishment of refrigerant can prevent the aging parts from harming the machine and human body and keep the air conditioner in good working condition. Tip 8: The national three guarantees protect the legitimate rights and interests of consumers. Air conditioning is a three-package commodity stipulated by the state. The whole machine is guaranteed for one year, and the main components (including compressor, fan motor and thermostat) are guaranteed for three years. If the whole air conditioner has a performance failure within 7 days from the date of purchase, consumers can request a full refund. In case of performance failure within 15 days, consumers can ask for depreciation, return or maintenance. If the air conditioner can't be used normally after two repairs within the three-guarantee period, consumers can request a return or replacement according to the maintenance records. The precautions for buying air conditioners should first be decided according to the size, orientation, height and number of people living in the room. In a sunny and poorly ventilated room, the power of the machine should be appropriately increased. Generally speaking, 1 air conditioner is suitable for 12 square meters, 1.5 air conditioner is suitable for 18 square meters, 2 air conditioner is suitable for 28 square meters, 2.5 air conditioner is suitable for 40 square meters, 3 air conditioners are suitable for 50 square meters and 5 air conditioners are suitable for 70 square meters. How to determine the cooling capacity Many people are concerned about how to choose the cooling capacity of air conditioners when purchasing them, but they don't know how to determine the names 1, 1.5, 1, 1.5. In fact, it is very vague to describe the output refrigeration capacity of air conditioning with the concept of horse. "Horse" originally refers to the output power of compressor motor. 1 The output power of the air-conditioning compressor motor is 735W W. As far as the current market is concerned, 1 set actually refers to air conditioners with an output of about 2,500 W, 1.5 sets refers to air conditioners with an output of about 3,500 W, and 2 sets refer to air conditioners with an output of about 5000W W. Note that here, 2,500 W and 3,500 W. For a specific room, how much cooling capacity should I choose per square meter? Many people want to know an accurate calculation formula. In fact, there is not such a recognized, acceptable and simple calculation formula and method at present. Even if there is a formula, it is inconvenient for users to calculate by themselves because there are too many correction parameters. Moreover, the use conditions of the room are not static, and there are too many factors that affect the cooling (heating) effect. If it can meet the cooling requirements, it may not be enough for heating in winter. So at present, it is generally based on experience. A comprehensive and safe recommendation is: 1 machine fit 14 square meter room; 1.5 horse fit 18 square meters room; Two machines are suitable for a room of about 30 square meters. Second, how to consider when determining the brand? As far as the brands on the market are concerned, after competition in recent years, the survival of the fittest. Anyone who still occupies a certain share in the market today basically has its reasons and conditions for survival. As far as technology is concerned, whether it is introduction or joint venture, everyone is neck and neck. Who is better than who, that is a kind of commercial propaganda. As far as I know, many brands have been tested again and again, and everyone is aware of the seriousness and risks of the market. So everyone knows the importance of advanced technology, the necessity of service in place, the advantage of low price and the urgency of pattern renovation. Therefore, consumers don't have to make great efforts to distinguish which is definitely better than which, nor should they follow their feelings and promotional advertisements, but should decide what kind of air conditioner to buy according to their own needs. Of course, this does not mean that the brand is not important. On the contrary, I strongly recommend that you buy domestic famous brand products. After so many years of fierce market competition, domestic refrigerators and air conditioners can compete with imported famous brands in quality and performance, and are superior to imported products in after-sales service. Third, buying window machines, cabinets or hanging different types of air conditioners has its own characteristics. You can't simply say which is good and which is not. According to your own room situation, economic ability and objective needs. Generally speaking, window machines are cheap and easy to install and use, but they are noisy. The hanging machine is not limited by the installation position, and it is easier to match with interior decoration, which is beautiful, quiet, expensive and troublesome to install. Generally, only one room can be cooled. The cabinet machine has high power and strong wind force, which is suitable for large-area rooms and can adjust the temperature of multiple rooms. However, compared with the split wall-mounted air conditioner, it is more expensive and occupies indoor area. Third, air conditioning should be cold and warm, and air conditioning should be selected as needed. There are two kinds of air conditioners: cold air conditioners and warm air conditioners. How to choose and decide as a family? Generally speaking, the southern region is not cold in winter and does not need heating, so you can choose single-cooling air conditioning. In the northern region, many houses have central heating measures in winter, and the heating function of air conditioners is idle most of the time. But it is precisely because of central heating that most cities stopped heating in March 15. If there is no warming or cold wave at this time, the heating function of air conditioner is essential. At this time, heating and cooling air conditioning can play a role, and the specific choice should consider the situation suitable for their respective regions and families. Fourth, the poor heating capacity of heat pump air conditioning and its countermeasures. Heat pump air conditioner is a common cold and warm air conditioner widely purchased and used at present. Because there is no central heating facility in the south, heating in the north sometimes provides and cuts off heating for a limited time regardless of the actual weather, which makes consumers who can't resist the torture of cold weather have to use the heating function of cold and warm air conditioners. However, to the disappointment of many consumers, I don't need to know, but I was shocked when I used it. The heating effect of heat pump air conditioner is so poor that they deeply sigh that it is not easy to love you. In fact, this is limited by the capacity of the air conditioner itself. 1, the hotter, the less hot. In fact, the energy decays too fast. After the air conditioning heating operation is started, consumers always feel that the room with air conditioning on is not hot, and the air blown from the air outlet of the indoor unit is even less hot. The air outlet temperature of the machine with good performance is 40℃ ~ 45℃; The difference can only be between 30℃ and 35℃. A 1。 Air conditioning can raise the temperature of a 15 square meter room to 16℃ ~ 17℃, which is quite good. The key problem is that the heating output capacity of heat pump air conditioner will decrease with the decrease of outside air temperature, and the attenuation range is relatively large. Obviously, with this heating output capacity, the temperature of the room can't rise, and there is no doubt that the heating effect is not good. 2. Due to the wrong defrosting setting, the room is hot first and then cold. Defrosting of heat pump air conditioner is inevitable during heating operation. Because every defrosting will stop the indoor unit from heating, the duration and frequency of defrosting will directly affect the temperature in the air-conditioned room. Many consumers report that the temperature of air-conditioned rooms is high and low, giving people the feeling of being hot and cold for a while. 3. Consumers' Countermeasures Before buying air conditioners, consumers must find out whether the heating function of heat pump air conditioners is necessary and essential for your daily life. Since the working temperature of heat pump air conditioner is between -5℃ and 42℃, if the outdoor temperature in the area where you live is lower than -5℃ in winter, the heat pump air conditioner will go on strike, so before there is no major technological breakthrough in heat pump air conditioner at present, you should carefully choose ordinary heat pump air conditioner. You might as well choose frequency conversion air conditioner, or air conditioner with auxiliary heating and other auxiliary heating appliances as your winter heating means. It must be noted that the stationmaster's air conditioner is not good at heating, because it is just a simple electric heating air conditioner. 5. Treat healthy air conditioning correctly. Although they are comfortable in air-conditioned rooms, if they don't breathe often, they will have unpleasant feelings such as heavy smell and poor air freshness. Excessive temperature difference between indoor and outdoor can also make people catch a cold. All these reflect that improper use of air conditioners can indeed lead to diseases, but can healthy air conditioners make you sit back and relax? Not necessarily! The health air conditioner designed for the purpose of improving air quality, no matter what form of air filtering device or negative ion generating device is installed on the ordinary air conditioner, is only a wish of the manufacturer. So, first of all, there is no scientific conclusion about how much harmful substances in the air can be absorbed by some form of air filtration device. Even if it has some effect, it should be said that it is valid. It is impossible to be "healthy forever". If frequent replacement of filter materials will increase the use cost, it is better to simply add an air purifier. Whether consumers can complete the regular replacement of air filtration devices by themselves remains to be considered. Secondly, although there is no objection that negative ions are beneficial to human health, there is a concept of effective concentration (the concentration of health care and treatment itself is not the same) and the requirement of effective distance (the farther the release port is from people's breathing, the weaker the effect), which no manufacturer can explain clearly. If the medicine does not reach the dose, it is equal to eating it for free. No matter how thick the concentration is, releasing a little negative ion at will can't give people health. As for photocatalyst, is its effect as magical as commercial propaganda? How much energy does it absorb and decompose harmful substances? After a long time, once there is dust on the contact medium, photosynthesis will also be lost, so how can consumers solve it themselves? The opinion in the industry is that healthy air conditioning cannot create health, but scientific and correct use of air conditioning is still a reliable and effective means to ensure health: 1 use air conditioning moderately; 2. The indoor and outdoor temperature difference is moderate; 3. Open the window for ventilation in time; 4 Suitable outdoor activities. Otherwise, it will not only be unhealthy, but even harmful to the body. Speaking of health, consumers can't be half awake and half drunk. 6. The indoor unit of air conditioner should not be too small. The indoor unit of household split air conditioner has become a member of the bedroom, so the decoration requirements (appearance and shape) are much more critical. In order to cater to the taste of air-conditioning consumers, some manufacturers of split air-conditioning have used their brains to change the shape of indoor units, minimize the volume and create different visual effects. Simply emphasizing small, quantitative change eventually leads to qualitative change. Because the indoor air duct is narrow and the circulating air volume is small, the heating speed is slow, and the circulating air volume in a certain area is small, which makes the room temperature uniformity worse and the heating effect is poor. Even if the air conditioner is on, a room will produce two obvious temperature zones. Standing under the air outlet of the indoor unit, your head will be blown hot, but you feel the need to wear more clothes when you leave a little distance. At the same time, the noise caused by vibration is also large, especially for indoor units of variable frequency air conditioners. When the operating frequency of the compressor changes to a high level, the noise transmitted from the outdoor unit to the indoor unit through the pipeline is limited, even without adjustment means. Seven, carefully choose the window air conditioner without drainage? In the refrigeration process of window air conditioner, there will be condensed water on the evaporator, which will drip out of the machine. If the water pipe is improperly installed and introduced into the sewer, the water will drop and drift at will, which will indeed lead to accusations from neighbors and passers-by. In order to help air-conditioning consumers solve this problem, some air-conditioning manufacturers concentrate the condensed water on the evaporator of window air-conditioning in the sink at the bottom of the casing, then take it out of the sink, splash it on the condenser through the water-throwing blades on the condenser blades, and use the heat of the condenser to evaporate, which can also improve the condensation conditions. This method is not only desirable, but also feasible in theoretical derivation. But when it comes to practical application, it becomes invalid, even in the opposite direction. The problem lies in our poor air quality and too much dust, which is a national condition. Splash the condensed water mixed with dust and sediment onto the condenser. When water evaporates, only dust and sediment remain on the condenser. Over time, putting a coat on the condenser has affected its condensation effect, which is only one aspect of the problem. The other side of the problem is that the dust, silt and other dirt accumulated on the condenser are not the "pure" and "kind" idle generation. The trace acid and alkali substances they contain will accelerate the corrosion of aluminum fins of the condenser, thus further affecting the condensation effect, damaging the condenser and shortening the service life of the air conditioner. Moreover, some window air conditioners that do not discharge condensed water sometimes produce disturbing splash and splash sound during refrigeration operation. Especially in the dead of night, this sound is intertwined with the sound of compressor operation and air circulation, playing a midnight trio. Myth 1: Buy a new machine if you want to buy it. Promotion quotation: Since it is a new air conditioner, just buy the latest one. You deserve what you pay. Expensive ones are definitely better to use. Although the technological innovation of air conditioning is endless, it is actually only peripheral technology for air conditioning, and its basic technology is very stable, that is, to realize the most basic and extreme function-refrigeration, and so is the demand of most consumers for air conditioning. The performance of air conditioners will decrease with the extension of service time. There is really no need to buy air conditioners like buying clothes. Consumer Reminder: Generally speaking, during the New Year's Day every year, new air-conditioning products launched by manufacturers begin to go on the market, which is the most expensive time of the year. However, in the peak season of May and June, a large number of goods in the manufacturer's inventory are on sale, and consumers can find air conditioners with higher cost performance at this time. Myth 2: Low energy efficiency ratio will be eliminated next year. Promotion quotation: look at the "energy efficiency ratio" sign on the air conditioner. By next year, the current secondary energy efficiency will become the lowest index, so it will be eliminated. Air conditioning does have an energy efficiency ratio, which is an important concept to measure its quality. According to the national energy efficiency standards, the energy efficiency ratio of air conditioners is divided into five grades, and the 1 grade is 3.4, which is the highest energy efficiency; Level 5 is 2.6, with the lowest energy efficiency. With the intensification of market competition and the country's emphasis on the development of energy-saving products, the "minimum energy efficiency ratio" of air conditioners will indeed increase gradually, but it depends on many factors such as the market and consumers, and it is unrealistic to "eliminate it next year". In addition, consumers need to be clear that the "energy efficiency ratio" is only an initial value, and the real energy saving should focus on "long-term energy saving". According to reports, at present, the way for air-conditioning enterprises to improve the energy efficiency ratio is mostly "small horse-drawn cart" design, which will shorten the life of compressors, so consumers should also consider many aspects when choosing. Consumer reminder: the higher the energy efficiency ratio, the more money you save, which involves the measurement between product cost and power saving. Considering the investment and income comprehensively, it is sometimes more cost-effective to choose an air conditioner with an energy efficiency ratio of 2 or 3. Myth 3: Any frequency conversion can save electricity. Promotion Quotations: It is better to buy a variable frequency air conditioner now, which saves electricity and is worth spending more money. "Frequency conversion air conditioner" can save electricity, but consumers must distinguish between "DC frequency conversion" and "AC frequency conversion" when purchasing. The efficiency of DC inverter compressor is 10% to 30% higher than that of AC inverter compressor, and the noise can also be reduced by 5 to 10 dB, which really saves electricity. Consumer Reminder: The price of DC inverter air conditioner is much higher, and compared with fixed frequency air conditioner, AC inverter air conditioner has achieved the characteristics of "fast cooling and constant temperature", and consumers can choose according to their own needs. Myth # 4: The cheapest promotion quotation for purchasing a machine in a hypermarket: Of course, you have to come to a chain hypermarket to buy an air conditioner. We guarantee that this is the lowest price in the city. At present, home appliance chain stores are becoming a powerful sales channel for home appliances, and often claim that their products are "the cheapest". Price is the biggest killer of a business and the ultimate embodiment of its profit, so it is often passive and unpredictable. Anxious consumers are often unable to "shop around". At this time, you can check the model prices of various brands of air conditioners through the internet, so that it is not easy for merchants to take advantage of the price. Consumer reminder: In fact, large-scale chain appliance stores have increasingly turned to win by word of mouth and service. Due to the rising operating costs, it is impossible to give consumers a lot of price space. And many air-conditioning shops on the street are actually good choices. Most of these stores are franchisees of a certain brand, with lower cost and more bargaining space for consumers. Smart consumers might as well have a try. Field experience is essential. Many manufacturers have a prototype demonstration at the purchase site, which allows you to reconfirm the product quality by observing the prototype. For businesses that do not provide live demonstrations, consumers should boldly ask for live experience. 1. Observe whether the shell is complete and smooth. 2. Whether the evaporator condenser is neatly arranged, loose and inverted. 3. If you buy a tow-two air conditioner, you must make sure that there are several compressors. There should be only one compressor for one trailer and two trailers. If there are three compressors, the power consumption and sound will be much higher. 4. When starting the machine, pay attention to whether the indoor unit and outdoor unit are working normally, and whether there is abnormal sound or parts rubbing sound. 5. Switch the running state and test again. 6. Touch your body with your hands to see if there is anything unusual. 7. When buying imported products, you should distinguish the place of origin, manufacturer and various import procedures. 8. Recognize the barnyard grass, trademark, factory name and address of the goods. Users' rights and interests should be clear, and after-sales service should be improved according to the Consumer Protection Law. Consumers have the right to get due service and commitment, such as: within 7 days from the date of sale, if there is a performance failure, consumers can choose to return, exchange or repair; If the product performance is unqualified within/0/5 days from the date of sale, consumers can choose to exchange or repair it. Generally speaking, services include: 1. Pre-sales consultation: provide the information you need, know your needs in detail, recommend suitable products, answer questions, including door-to-door design and provide installation plans. 2. Free home delivery after sale (free fare in the city). 3. Free installation in the city. 4. The whole machine is guaranteed for one and a half years, and the compressor is guaranteed for three years (now many enterprises have exceeded this requirement: the whole machine is guaranteed for three years and the compressor is guaranteed for five years). 5.24-hour service in place. 6, regular visits, air conditioning maintenance. 7. Professional maintenance team and convenient maintenance points. common sense