Air conditioner performance

A. What factors should consumers consider when buying an air conditioner?

Consumers should consider the following factors comprehensively when choosing an air conditioner: brand, dealer, product technology level, air conditioner performance indicators, relevant certifications, and price. In other words, first compare, then select, and finally check.

Choosing a brand: A brand is a symbol of a company and its technology, product quality, and reputation. Choosing a brand is essentially choosing a company, quality, and reputation.

Choosing a Distributor: Selecting a good distributor when shopping for air conditioners in a mall will provide consumers with dual protection of their interests. This is because the installation and maintenance of air conditioners are mostly carried out by the distributor. The technical level of the distributor’s installation and maintenance is very important. Air conditioners produced by companies are only semi-finished products and require professional installation and adjustment to function properly. The quality of installation plays a crucial role in ensuring the overall product quality.

Looking at product technology, even products from the same brand can have certain technical differences. Generally speaking, well-known air conditioner brands offer three levels of air conditioning products: those with mature technology, those with imported technology, and those with unique added value.

Look at performance indicators. Generally, you can gauge the advancement of performance by looking at the indicators. Check the energy efficiency ratio: the higher the ratio, the better the technical performance and the more energy-saving it is to use.

Check for national certification. As a household appliance, air conditioners must pass the national household appliance product safety certification. Consumers should never buy air conditioners without the national appliance safety certification mark just to save money, otherwise they may risk electric leakage, fire, and personal safety hazards.

Comparing Prices: Comparing prices is only meaningful for consumers after evaluating the top five factors of each brand.
Precautions for Using Air Conditioners

The optimal temperature for using an air-conditioned room should be as close as possible to a person’s comfort level. From a health perspective, the temperature difference between indoors and outdoors should not be too large when using air conditioning. Generally, a difference of 8 degrees Celsius is appropriate, and it is best not to exceed 10 degrees Celsius to avoid symptoms such as catching a cold due to sudden changes between hot and cold environments when entering or leaving the room.

1. In rooms where air conditioning is used, the air quality can easily deteriorate over time due to prolonged closure, which can significantly affect a person’s health. Therefore, doors and windows should be opened regularly to refresh the indoor air and avoid health risks caused by long-term oxygen deficiency.

2. Due to the dehumidifying effect of air conditioners, using air conditioners in summer can easily make indoor air too dry. Being in an overly dry environment for a long time can also make people susceptible to illness. Therefore, except in cases of rainy weather when the air humidity is relatively high, or in areas where the air is naturally humid (such as coastal regions), water should be regularly sprayed on the floor or other suitable places indoors to increase indoor air humidity.

3. When using an air conditioner in the summer, the indoor unit should be set to blow air in a nearly horizontal direction, while in the winter, it should blow air slightly downward. This helps to balance the temperature throughout the room as much as possible and can also reduce unnecessary energy loss to some extent.

B. Several Issues to Pay Attention to When Choosing an Air Conditioner
First, you should decide based on the room size, orientation, floor level, and number of residents. In rooms with morning sunlight or poor ventilation, it is advisable to appropriately increase the unit’s capacity.

Matching Room Size with Air Conditioner Capacity
One horsepower = 750W. For household air conditioners, ‘hp’ refers to input power. Converting to the output power commonly used in our country, 1 ‘hp’ is equivalent to 2200W–2600W. Therefore, using ‘hp’ as a measurement is still rather rough, which gives rise to terms like ‘big 1 hp’ or ‘small 1 hp.’ Generally, 1 ‘hp’ refers to a cooling capacity of 2300–2500W, with an approximate input power of around 800W. 4500W–5100W can be called 2 hp, and 3200W–3600W can be called 1.5 hp. ‘Hp’ is a unit based on cooling capacity. The factors that determine the size of the air conditioner needed include room area, ceiling height, insulation, whether it is on the top floor, and exposure to west-facing sunlight, among others.

Air conditioners suitable for a 10 square meter room: 1 HP;
Air conditioners suitable for a 15 square meter room: 1-1.5 HP;
Air conditioners suitable for a 20 square meter room: 1.5 HP;
Air conditioners suitable for a 30 square meter room: 2-2.5 HP;
Air conditioners suitable for a 40 square meter room: 2.5-3 HP;
Air conditioners suitable for a 50 square meter room: 3.5-4 HP;
Air conditioners suitable for a 70 square meter room: 5-6 HP;

When the living space is relatively large, you can choose two 3-horsepower air conditioners or two 5-horsepower units. You also need to consider the home’s ventilation; if the environment is well-sealed, you might opt for units with slightly lower horsepower. Additionally, you should take into account the home’s electrical voltage and other factors, so it’s best to consult a professional air conditioning technician.

Secondly, it is necessary to determine which domestic and international official technical evaluation authorities have certified the product’s quality. Finally, the product’s quality should be assessed based on the materials used. Many manufacturers have demo units on-site, allowing you to observe the demo units and reconfirm the product’s quality.

Proper Use of Air Conditioners
1. Be careful not to frequently turn the air conditioner on and off, and avoid frequent, continuous switching between different modes. This prevents the compressor from repeatedly starting in a short period of time. This is especially important for window air conditioners, where it is strictly prohibited to restart the compressor within three minutes after it has been turned off.

2. Indoor temperature should be set reasonably, not too low (in summer) or too high (in winter).
3. When using an air conditioner in summer, the indoor unit should blow air in a nearly horizontal direction. In winter, it should blow air slightly downward. This helps to balance the temperature throughout the room and can also reduce unnecessary energy loss to some extent.

Pay attention to improving the air conditioner’s efficiency

1. Operate the air conditioner as close to standard conditions as possible.
2. Regularly clean the air filters and screens, and periodically remove dust from the evaporator and condenser.
3. Reduce heat loss in air-conditioned rooms and ensure proper insulation.

Take care of the air conditioner to extend its lifespan
1. Perform regular maintenance to ensure the air conditioner is operating properly
2. Do not frequently turn the air conditioner on and off manually during use to ensure the compressor starts efficiently. This is especially important for window air conditioners, where restarting the compressor within three minutes of shutdown is strictly prohibited

3. Ensure power quality. Power voltage that is too high or too low can damage the compressor. In areas with unstable voltage, it is advisable to use an automatic voltage regulator.

4. When the air conditioner is operating in cooling mode, if the outdoor ambient temperature is too high, approaching or exceeding 43°C, it will cause the compressor to run under severe overload. Frequent operation under such conditions can greatly damage the compressor and even burn out the motor inside the compressor.