It is best to buy air conditioners by frequency conversion or fixed frequency. People turn on air conditioners in summer, and people who want to buy air conditioners are very confused about whether it is better to buy such air conditioners. Then, come with me to see if it is better to buy a variable frequency or fixed frequency air conditioner.
Is it better to buy an air conditioner with frequency conversion or fixed frequency? 1 What is a fixed frequency air conditioner?
Constant frequency air conditioning means that when the indoor temperature reaches our set air conditioning temperature, it will stop working. When the room temperature drops, the fixed-frequency air conditioner will start to work again, so there will be on-off-on-off phenomenon when it is used, and people will feel uncomfortable because of the large temperature difference.
What is inverter air conditioning?
Inverter air conditioner is an upgraded version of fixed frequency air conditioner. An inverter is added to the air conditioner. When the indoor temperature reaches the set air conditioning temperature, it will run at low frequency and will not be turned off, that is, it will always be on. This is the saying that electricity is used once a night. Moreover, the inverter air conditioner can be started normally at low temperature and low pressure, and there is no temperature difference, so people are very comfortable.
It stands to reason that the fixed frequency air conditioner is on and off, and it is not used in the middle, so it should save more electricity! Why do inverter air conditioners save electricity? Air conditioning experts tell us that the power consumption when turning on the air conditioner is higher than that already used, so the power consumption will be higher. But is this really the case? Actually, it is not. Only if it is used continuously for more than 6 hours, the inverter air conditioner will save electricity than the fixed frequency air conditioner.
However, inverter air conditioners are expensive, faulty and particularly prone to breakdown. According to statistics, the failure rate of inverter air conditioners is much higher than that of fixed-frequency products of the same brand. Because the inverter air conditioner keeps running and frequency conversion, the service life of components is seriously affected. For example, when a person runs, the fixed frequency means running for a while and then taking a rest, and the inverted frequency means running and jogging all the time, which is easy to go wrong. Moreover, the internal parts of the inverter air conditioner are all high-tech and maintenance.
So, we don't have to worry about buying fixed frequency or variable frequency. If the family conditions are good and comfort is pursued, buy inverter air conditioners. If it is based on the principle of saving money, you must buy a fixed-frequency air conditioner. Compared with buying a variable frequency air conditioner, we can buy two fixed frequency air conditioners, and the fixed frequency air conditioners will not break down for more than ten years.
Note: Air conditioners are divided into indoor units and outdoor units. Indoor units can only be placed indoors, and outdoor units can only be placed outdoors.
Mother was afraid that thieves would steal the air conditioner and move in without authorization. She almost fainted from the heat! Hui hurried home and saw this scene in distress situation.
Is it better to buy a variable frequency air conditioner or a fixed frequency air conditioner? 2 The difference between variable frequency air conditioner and fixed frequency air conditioner.
Before understanding the difference between variable frequency air conditioning and fixed frequency air conditioning, let's first understand the principle of general air conditioning. Freon is a commonly used refrigerant in air conditioners. Freon releases a lot of heat when it changes from gas to liquid, and absorbs a lot of heat when it changes from liquid to gas. The air conditioner is designed according to this. The overall principle of air conditioning is the same. What's the difference between variable frequency air conditioner and fixed frequency air conditioner?
Does inverter air conditioner save electricity?
Let's calculate the cost of air conditioning first. For example, the air conditioner is used for three months a year, 30 days a month, and runs for 8 hours on average every day. The cooling operation time is 960 hours, and the average power of the air conditioner is 2000W W W. During the cooling period, the total power consumption of the fixed-speed five-stage air conditioner (EER = 2,6) is 1920 degrees. If you use the current Shanghai standard five-level inverter air conditioner (EER=3), you can save a lot of money if you use it for a long time.
Why do inverter air conditioners need to be evacuated?
1. Exhaust the air and nitrogen in the pipeline to achieve a vacuum state.
2. Vacuum drying can eliminate water in the system.
At one atmospheric pressure, the boiling point of water is 100℃, but with the increase of vacuum degree, the boiling point decreases rapidly. If the boiling point drops below the ambient temperature, the water in the pipeline will evaporate. When the vacuum degree is 0.05kg/cm and the absolute pressure is 0.05kg/cm. When the gauge pressure is-1kgf/cm2, the water in the system can be completely evaporated. If there is moisture in the system, chemical reactions that affect the refrigeration cycle system will occur, such as refrigerant oxidation, electrical insulation damage, refrigeration oil dilution and so on, which will damage the compressor.
How to choose a suitable vacuum pump?
A suitable vacuum pump must be selected before vacuumizing. The selected vacuum pump is small, and the vacuumizing time is too long, which can not meet the vacuum requirement. The vacuum pump selected requires that the vacuum degree of the system can reach Okg/cm after vacuumizing. (Gauge pressure is-1kg/cm2). The following are two factors that determine the performance of vacuum pump:
1, select the pump that is expected to reach the vacuum degree (i.e. gauge pressure -0 1MPa);
2. The required displacement is large (above 40l/min).
Vacuum steps of variable frequency air conditioner
1. After the leak detection is qualified, discharge nitrogen and connect the pressure gauge connector to the large and small valves of the outdoor unit. Connect the vacuum pump to the fluorine injection nozzle, and at the same time vacuum high and low pressure. Turn on the vacuum pump and turn on the "L0" and "H 1" knobs;
2. After the vacuum degree reaches -0 and 1MPa(- 1kgf/cm2), continue pumping for 0, 5- 1 and 0 hours, then turn off the "VH" knob at the high pressure end and the "VL" knob at the low pressure end to stop the vacuum pump;
3. Connect the hose connected to the vacuum pump to the refrigerant charging tank, exhaust the air in the hose, open the "VL" knob at the low pressure end, and charge the refrigerant into the system pipeline. When the pressure reaches 0 and Okgf/cm2, turn off the "VL" knob at the low pressure end;
4. Reconnect the hose connected to the refrigerant charging tank to the vacuum pump, turn on the vacuum pump, turn on the "VH" knob at the high-pressure end, and then turn on the "VL" knob at the low-pressure end to pump air at the low-pressure end until the vacuum degree reaches 0, 1 MPa (gauge pressure-1kgf/cm2).
If the vacuum degree reaches -0, 1MPa (gauge pressure) or lower, after vacuumizing, turn off the vacuum pump and leave it at 1 hour, and then check whether the vacuum degree changes. If there are changes, there are loopholes. Leaks should be checked and repaired.
Is it better to hang the air conditioner on the wall or stand in the closet?
According to the style, air conditioning can be divided into stand-alone (window machine), wall-mounted air conditioning, cabinet air conditioning and embedded air conditioning patio air conditioning.
1, single machine (window machine): mainly used for refrigeration, with small air supply, suitable for small rooms, low price and high noise.
2. Wall-mounted air conditioner: effective air supply distance (7 meters), low noise and high energy efficiency, and some models have electric auxiliary heating. Mainly suitable for bedrooms, study rooms, offices and other places with high requirements for environmental noise.
3. Cabinet air conditioner: effective air supply distance (15m), high power, and most models have electric auxiliary heating, which consumes a lot of electricity; Mainly suitable for living rooms, conference rooms, entertainment centers and other places.
4. Embedded type (patio type): namely, ceiling suction machine. The main body of the indoor unit is hidden in the ceiling and does not occupy the space of the activity area; In addition, the internal machine adopts air outlet from all sides, which has uniform air outlet and wide effective use range.
Which way is the best for air conditioning, refrigeration and heating?
Air conditioning can be divided into single cooling air conditioning, cold and warm air conditioning and electric auxiliary heating air conditioning according to performance.
1, single cooling air conditioner: mainly used for refrigeration, with small air supply, suitable for small rooms, low price and high noise.
2, heating and cooling air conditioning: not only has the function of refrigeration and dehumidification, but also can be heated by heat pump.
3. Electric auxiliary heating air conditioner: widely used in split air conditioners to enhance the heating effect, with poor working efficiency and high power consumption.
Have you made a decision through the above understanding? But no matter what kind of air conditioner you buy, the quality must be guaranteed first. As for the choice of air-conditioning brands, you can refer to the top ten air-conditioning brand information provided by the IT Encyclopedia of Pacific Computer Network:
Gree Gree, an iconic brand in the air-conditioning industry, is an energy-saving and environmental-friendly refrigeration equipment engineering technology research center, with G-Matrik DC frequency conversion technology, and Zhuhai Gree Electric Co., Ltd.
Haier Haier, founded in 1984, is the world's leading overall solution provider for household appliances, one of the top 500 Chinese enterprises, and Haier Group, a household appliance enterprise group that started with the production of refrigerators.
198 1 Midea started as a world-class white goods manufacturer and brand, a fortune 500 enterprise, a large comprehensive enterprise group, a listed company and Midea Group Co., Ltd..
Hisense Hisense, founded in 1969, is a large domestic white goods manufacturer, a super-large electronic information industry group involved in the fields of household appliances/communication/information/real estate, and Hisense Group.
Chigo Chigo, founded in 1994, is a high-tech enterprise with a huge and complete air-conditioning industrial chain in China. Guangdong chigo air conditioning Co., Ltd. launched the service of "free replacement of spare parts for life" earlier.
Daikin Daikin, 1924 was founded in Japan, a large multinational enterprise, one of the top ten brands of central air conditioning, and a leading Japanese brand, Daikin (China) Investment Co., Ltd.
Panasonic Panasonic, 19 18 is a world-renowned consumer electronics brand in Japan, involving many fields such as home appliances, digital audio-visual electronics, office products and aviation, and a world-renowned comprehensive electronic technology enterprise group.
Kelon, 1984, is a listed company specializing in R&D/ manufacturing/marketing and service in the field of white goods such as refrigerators. It is a subsidiary of Hisense Group and Hisense Kelon Electric Co., Ltd..
AUX Aux, 1986, one of the top ten air-conditioning brands, is a high-tech enterprise dedicated to modern manufacturing such as intelligent power equipment/household appliances and modern service such as real estate/medical health/finance. Aux group limited
Mitsubishi Mitsubishi, founded in 192 1, a fortune 500 company, is committed to the research and development of cutting-edge technology and professional knowledge, mitsubishi electric (China) Co., Ltd.
The top ten air-conditioning brands are well-known air-conditioning brands in the market, which are leading in the industry, advanced in technology and excellent in quality, not to mention. Consumers are advised to buy.
Is it better to buy a variable frequency air conditioner or a fixed frequency air conditioner? 3 Advantages of variable frequency air conditioning
1, comfortable
Comfort is the biggest advantage of inverter air conditioner. This will start with the working logic of frequency conversion air conditioner and fixed frequency air conditioner: for fixed frequency air conditioner, it will be cooled as soon as it is turned on. When the indoor temperature drops to the set temperature, the air conditioner will stop cooling (shut down). The constant frequency air conditioner will not continue to cool until the indoor temperature rises again.
For inverter air conditioners, it is also fully cooled just after starting. But when the indoor temperature drops to the set temperature, the air conditioner will change the cooling frequency-continue to cool, but produce a small amount of cold air to maintain the indoor temperature.
One is to stop and go, and the other is to continue walking slowly. For people who are indoors, it must be the latter that provides more comfort. Fixed-frequency air conditioner will blow out very cold wind when cooling, which makes people feel very cold. When the fixed-frequency air conditioner is turned off, the indoor temperature will rise rapidly, resulting in great changes in the indoor temperature.
2. Save electricity
The start and stop of air conditioner refers to the operation and stop of compressor (compressor is installed on external air conditioner). At the moment when the compressor is started, it will generate a lot of current and consume a lot of electric energy-to put it bluntly, it is very power-consuming.
The compressor of inverter air conditioner will only start once when it is started, and then it will not generate starting current. Therefore, compared with the frequent start and stop of fixed-frequency air conditioners, variable-frequency air conditioners will save more electricity when working.
So if you have a strong sense of environmental protection, or have a high pursuit of comfort (such as bedroom use), I suggest you choose inverter air conditioning.
Advantages of fixed frequency air conditioning
1, save money
Inverter air conditioner saves electricity, but it doesn't mean saving money. First of all, the price is different. On the premise of the same quality and parameters, the price of inverter air conditioner will be nearly 1000 yuan more expensive than that of fixed frequency air conditioner. Inverter air conditioners do save electricity, but how long will it take 1000 yuan of electricity? If you use air conditioning for three months every year and use it for eight hours every day for three months, it will take about 8 to 10 years. However, it is a question whether the current air conditioning quality can be used for 8 years.
Secondly, the later maintenance cost is relatively high, taking fluoride as an example (isn't the air conditioner "short of fluoride" at every turn). The refrigerant of fixed frequency air conditioner is generally R22 model, and the variable frequency air conditioner is generally R32 or R40 1a model. The former is nearly half cheaper than the latter.
2. Life span
Under the same quality, the life of fixed frequency air conditioner is longer. This is easy to understand. Inverter air conditioners have more functions and need more equipment. Relatively speaking, the frequency of failure is higher. Many fixed-frequency air conditioners have never experienced maintenance in their whole lives, but few variable-frequency air conditioners.