How Do I Choose Between Air Conditioning Companies?

Air conditioner is Air Conditioner. It refers to the equipment that adjusts and controls the temperature, humidity, flow rate and other parameters of the ambient air in the building or structure by artificial means.

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There are many types of home air conditioners, including wall-mounted air conditioners, stand-type air conditioners, window air conditioners, and ceiling air conditioners. .

There are four types of home air conditioners:

Wall - mounted air conditioner

The structure of the air conditioner includes:

Air conditioners are divided into single-cooled air conditioners and dual-purpose air-conditioning air conditioners. The working principle is the same. Most of the refrigerants used in air conditioners were Freon. The characteristic of Freon is: When changing from gaseous state to liquid state, it releases a lot of heat. When changing from a liquid state to a gaseous state, a large amount of heat is absorbed. (That is, first absorb heat and gasify, then liquefy and release heat) The air conditioner is designed based on this principle.

The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and then sends it to the condenser (outdoor unit) to dissipate heat and become a liquid refrigerant at normal temperature and pressure.

Then to the capillary and into

Air conditioner transfer is a professional air conditioning technology job. The seemingly simple air conditioner transfer work has different operation results in the hands of different air conditioner transfer personnel. When it is necessary to move the air conditioner, try to choose the company authorized by the manufacturer for the air conditioner. Otherwise, it will cause damage to the air conditioner if you spend extra money. Air conditioner transfer is divided into two steps: disassembly and installation.

One,

The output cooling capacity (heat) of the selected air conditioner should correspond to the use area. Due to the differences in the conditions of the rooms and the regional climate and the plans for extreme weather, you should buy large air conditioners but not small ones.

There are many factors that will affect the heating effect of air conditioners. Among them are the most important items such as floors, sun exposure, west windows, and apartment types. So how to accurately calculate the air conditioning power required for a room?

First set the cooling capacity required per square meter to 150W;

If one of the top floor and the west is occupied, it is calculated as 200W per square meter;

If there are west windows or both the top floor and the west, at least 250W per square meter;

It has a west window and a top floor, at least 300W per square meter;

There can only be more and more, or the fixed speed machine will not stop or the frequency converter will always run at full speed until the protection starts, resulting in that the room air temperature cannot be adjusted; refer to the table below for the area selection

Room size suitable for air conditioning (cooling)

10 machines below ^{2 and} 23 machines (smaller one)

10M ² -14M ² 26 machines (larger)

14M ² -18M ² 32 machines (smaller one and a half)

16M ² -20M ² 35 machine (plus one and a half)

20M ² -32M ² 50 machines (positive two)

30M ² -45M ² 61 machine (two and a half)

45M ² -55M ² 75 machines (big three horses)

Choice of air conditioning type

Constant speed and frequency conversion

Domestic air conditioners are divided into variable frequency and fixed speed. The ability of the same number of air conditioners to adjust the indoor temperature, the frequency conversion air conditioner is greater than the fixed speed air conditioner. Inverter air conditioners are relatively cost-effective and use more energy. In addition, the variable frequency air conditioner can achieve accurate temperature control and prevent "air conditioning disease" in certain procedures.

1. The electricity cost of fixed speed air conditioner:

The startup current of the fixed-speed air conditioner is several times the rated current, and the constant-speed air conditioner frequently starts and stops during operation, which consumes electricity.

The constant speed air conditioner keeps heating at the rated high power during operation. After the room temperature rises to the air conditioner set temperature plus 1 degree, the air conditioner stops. After the air conditioner is shut down, when the room temperature drops to the air conditioner set temperature minus 1 degree, the air conditioner starts again, and so on. The same goes for refrigeration.

The constant-speed air conditioner has insufficient heating capacity in winter, with electric auxiliary heating elements, and the energy efficiency ratio is only 1. The electric auxiliary heating power of the fixed-speed air conditioner is 1 to 2 kW, which consumes electricity.

2. Power saving of inverter air conditioner:

The start-up of the inverter air conditioner is a soft start, no impact current, and no waste of electricity.

Inverter air conditioner is warmed up at high frequency during operation. When the room temperature reaches the air conditioner set temperature, the air conditioner will run at low frequency and keep warm without stopping. The power consumption for continuous low frequency operation is only one third of the rated power, or even one quarter. The same goes for refrigeration.

Inverter air conditioners do not have electric auxiliary heating elements that consume much electricity.

In summary, the continuous low-frequency operation of the inverter air conditioner does not have frequent inrush current, nor does it have the high-power operation for a long time like the fixed-speed air conditioner. There is no electric auxiliary heating element that consumes electricity. Speed air-conditioning energy saving.

Cooling settings

From the perspective of the summer air-conditioning start-up index, 30-33 ° C is a grade 4, 70% of people need to be turned on; 33-35 ° C is a grade 5, and 90% of people need to be turned on. After turning on the air conditioner, pay attention to adjusting the indoor and outdoor temperature difference. The room temperature should be set at about 24 -18 , and the indoor and outdoor temperature difference should not exceed 7 .

If the outdoor temperature is 32 degrees, the indoor air conditioner is generally 25 degrees.

When the air conditioner is cooling, the set temperature is about 26-28 ° C. In this case, not only the human body feels more comfortable, but it is also conducive to energy saving. When the air conditioner is cooling, do not set too low temperature. When the room temperature is adjusted to 26-27 degrees, its cooling load can be reduced by more than 8%. Experiments show that under normal conditions, the room temperature is maintained at 28-29 degrees and the humidity is maintained at 50-60%. People do not feel hot or sweaty, which is a comfort range. When a person sleeps, their metabolism decreases by 30-50%. The air conditioner can be set to the sleep switch. Setting the temperature 1 degree higher can save 10% of electricity.

Heating settings

The optimal temperature setting for winter air-conditioning temperature is 20 ° C. Moderate indoor temperature is not only good for your health, but also avoids overloading the air conditioner. When heating, just use a low windshield and switch to a medium windshield after half an hour. For those who like to increase the indoor temperature, please be careful not to set the temperature to the extreme 30 that the air conditioner can withstand in winter, otherwise it will cause the air conditioner to start or stop frequently, increase the power consumption, and even damage the air conditioner compression in severe cases. machine. Since the heating flow is lighter than air, it is easy to float above the entire enclosed room. When using a wall-mounted air conditioner, it is best to adjust the air outlet to a downward angle to save power.

Set attention

The setting of the air-conditioning temperature must be kept within a reasonable temperature range, that is, 26 ° C to 28 ° C in summer and 18 ° C to 20 ° C in winter. The temperature of the air conditioner should not be too different between indoor and outdoor. Generally, it is suitable to be 5 10 . If the temperature difference is too large, it will easily suffer from colds and other diseases when it goes through sudden changes in temperature when entering and leaving.

Air-conditioning installation location

Generally, the installation location of the air conditioner should avoid heat sources, and hot air removal and noise interference should not affect neighbors. The installation height of the outdoor unit should be lower than the indoor unit, which is conducive to the circulation of refrigeration oil. The outdoor unit should be installed without short circuit of hot air, so as not to affect heat dissipation: the installation location should be convenient for maintenance, easy to drain and not affect pedestrians passing by, avoid or stay away from high voltage lines, places with radiation and flammable and explosive places. There should be no obstruction in front of the indoor unit installation, and the jet distance of cold air (or hot air) should be guaranteed to make the indoor temperature more uniform.

Air conditioning maintenance

Maintenance before starting

Generally, the household air conditioner will be shut down and deactivated until September, and will not be switched on until May to June of the following year, and will be deactivated for more than half a year. Therefore, a comprehensive "diagnosis" must be done before the air conditioner is turned on. Check whether the air conditioner has any "defects". According to the results of the inspection, under the guidance of professional and technical personnel, do a good job of maintenance and cleaning. This maintenance and cleaning should be in place. Including the casing, body and filter of the outdoor unit and indoor unit, and then start a trial operation to observe the cooling speed and effect.

Maintenance during startup

After the air conditioner is turned on, the environmental conditions, climatic conditions, hours of startup, surrounding dust, air cleanliness, and whether the room is clean and many other factors determine the number of maintenance during the air conditioner startup. The environmental conditions are not good, the weather is hot, the air conditioner is outdated, the air conditioner is turned on for a long time, and the number of maintenance during the startup of the air conditioner is increased, usually once every one and a half months. If the environmental conditions are good, the air conditioner is relatively new, there is little dust in the air, the air conditioner is turned on reasonably, and it is used alternately with the electric fan, the maintenance period can be appropriately extended, from 1-2 times when the air conditioner is turned on to when it is turned off. Maintenance should be careful and careful, leaving no dead ends. Meet the specifications, improve the cooling speed, cooling effect, achieve energy saving, fresh and comfortable.

Maintenance after shutdown

The weather turns warm, the air conditioner turns on, the weather turns cool, and the air conditioner turns off. This is a perennial law. Note that the outdoor unit and indoor unit should be thoroughly inspected before the air conditioner is turned off. Maintenance, maintenance, and cleaning must be fastened one by one, and they cannot be disconnected. The leaky links should be fastened and strictly inspected. After completing the above steps, put the air conditioner hood on to prevent dust pollution and prevent dripping and water ingress of the air conditioner. Keep it clean and prepare it for reuse in the coming year. This will clean, save energy, and extend the life of your air conditioning equipment. For well-known brands of high-quality split machines, cabinets should be protected to give full play to energy-saving effects.

Air conditioning maintenance during normal hours

1. Remove debris from the vents to ensure proper ventilation. Observe whether the outdoor rack is loose or not, and clean the outdoor ventilation grille for foreign objects. At the same time, keep the vents unobstructed.

2. The surface of indoor and outdoor heat exchangers is cleaned to improve the efficiency of the heat exchanger. When cleaning the indoor heat exchanger, you should carefully remove the panel, scrub it with a soft rag, and use a small brush to gently scrub the heat exchanger of the internal machine, so as to achieve the purpose of removing harmful accumulation of dust and multiplying bacteria. But note that because the heat sink is a very thin aluminum material, it is easy to deform after being stressed, so be careful to brush it.

3 Clean the dust on the filter. When cleaning the filter, first cut off the power and then open the air intake grill; remove the filter, clean the filter with water or a vacuum cleaner, the temperature of the water should not exceed 40 degrees, wash with a hot wet cloth or neutral detergent, and then wipe with a dry cloth Clean the filter without using pesticides or other chemical detergents.

4 Clean dirt and build-up in the drainage part. The drainage part is easy to deposit dirt, and it must be thoroughly disinfected regularly to ensure smooth drainage and prevent bacteria from multiplying.

5. Check other. Including power supply lines, plug boards, switches; check the condition of consumables such as wind deflectors, sterilization and dehumidification, photocatalyst and other components to ensure that the air conditioner is in good condition and no abnormality.

Air conditioning maintenance during special hours

During the seasons with moderate temperatures from March to May and September to November, people generally leave the air conditioners in a non-working state. In the season when the air conditioner is not used, the power of the air conditioner should be disconnected first, but it is best to keep the amount of power on once a month to prevent the internal oil from condensing if it is not used for a long time. At the same time, in order to ensure the long-term high-speed operation of the air conditioner and the extension of the use mission, attention must be paid to the proper maintenance of the air conditioner when the air conditioner is suspended and started to be used.

1. After using season. Before the air conditioner is suspended, set the air conditioner to the ventilation state in sunny days, and turn it on for about half a day to completely dry the inside of the air conditioner. At the same time, the dust filter, indoor unit and outdoor unit should be cleaned.

2. Before the season begins. Check the air inlets and outlets of indoor and outdoor units for obstructions, so as not to reduce the working efficiency of the air conditioner; install a dust filter to avoid damage to the machine or cause failure due to dust entering the machine; use a dry cloth to clean the remote control. Do not use glass cleaner or a cloth containing chemicals. After cleaning, load two new batteries of the same type.

Air conditioning cleaning method

The cleaning of the air conditioner should include three parts:

First, the air-conditioning body shell and exposed parts, easily contaminated parts;

Second, filter cleaning is the most important part of the core;

Third, the condenser and evaporator parts are relatively rare. They are combined with maintenance, which is equivalent to cleaning a small system. It is a relatively large "surgery". Older air conditioners or "special price machines" and "inferior machines" often appear. Most of the first-class air conditioners have no cleaning and maintenance value and will not be described in detail.

With regard to the cleaning of the air conditioner body shell and the corresponding parts, as long as a little soap powder and detergent are added to the water, or a special air conditioner cleaning solution can clean a considerable part of the air conditioner, which meets the requirements of cleaning operations.

As for the key part of household air conditioning cleaning, cleaning the filter, first open the air conditioner indoor unit cover, remove the filter, brush with a clean filter brush, clean most of the dirt attached to the filter, and then soak it In a solution containing special-effect air conditioner cleaning solution or homemade cleaning solution or a mixture of dishwashing liquid and soap powder, soaking time is 10-20 minutes, depending on the dirtyness of the filter. After soaking, gently brush the filter with a bottle brush. Let each filter hole be clear and transparent, without any traces of dirty plugging, and then wipe dry with a special cleaning cloth. Check that it is intact. After installing the filter to the body, check whether the operation is normal. If it is normal, you can sign for acceptance, and the cleaning work is over.

Cleaning of domestic air conditioners is beneficial to improve the cooling efficiency; it is beneficial to improve the cooling effect, to extend the life of domestic air conditioners and equipment, to improve the energy saving effect, and to help users' health.

Many years of practice in the air conditioning industry have proven that it is best to clean the air conditioner 2-3 times a year. It is usually reasonable to clean the air conditioner before turning it on, once in the middle of turning on the air conditioner, and once when the air conditioning is turned off. Sometimes when the air conditioner is turned off, after a major clean-up of maintenance, maintenance, cleaning and other processes, the air conditioner is put on the hood. When the air conditioner is turned on in the next year, it will be relatively clean and the filter screen will be clean. Cleaning twice, the effect is very good, saving labor and costs, reducing operating costs, without affecting the cooling effect.

Air conditioning considerations

1. The power supply voltage must not fluctuate too much (± 10% fluctuation is allowed), and the air conditioner should be powered by a dedicated line, using a single-phase three-hole socket, and the plug must be inserted to the end.

2. The housing of the indoor unit should be cleaned frequently. Generally, it can be wiped clean with a clean dry cloth or with a neutral detergent. It is absolutely not allowed to rinse directly with water. If it is wiped with a cloth, it should be performed after power failure.

3, the indoor temperature can not be adjusted too low, otherwise it is not good for the human body, and the set temperature should be adjusted appropriately.

4. If the indoor temperature is too high, you can lower the set temperature appropriately.

5. Effective use of the timer can achieve both energy saving and comfortable effects.

6, the air-conditioned room should not be too many people, overcrowded, otherwise the cooling capacity will be insufficient and the temperature will be difficult to drop;

7, the doors and windows of the room should not be opened and closed frequently, personnel should not enter and exit frequently to avoid the loss of air-conditioning;

8. The glass windows must be closed tightly and tightly, and double white curtains should be hung inside to reflect a part of the light and heat penetrated;

9, the window can be opened briefly during indoor ventilation, the window opening time generally does not exceed 10 minutes;

10. The air filter should be cleaned regularly, otherwise the air flow will be blocked, causing insufficient air volume and rising room temperature;

Clean air conditioner

11, adjust the temperature during sleep, the air conditioner can automatically adjust the sleep temperature;

12. The outdoor unit should be installed securely to reduce vibration and noise. There must be enough space in front of the suction and exhaust ports of the condenser to facilitate ventilation. If the wind is blocked, the increase in condensation pressure will cause shutdown.

13, there should be no obstacles in front of the indoor unit, otherwise it will affect the wind;

14, when the air conditioner is running, it can quickly reduce the temperature. The selector switch can be adjusted to the high-speed position. After the temperature drops, it can be adjusted to the low-speed position.

15, the window type air conditioner can use the ventilation switch for ventilation, but the ventilation time does not exceed 15 minutes;

16. Too much dust accumulation on the outdoor radiator of the air conditioner will reduce the efficiency. The outdoor radiator should be regularly checked and cleaned (after power outage, it can be blown off with compressed air);

17. The outdoor unit of the split air conditioner cannot be inserted with sticks or objects, otherwise the fan will be stuck or damaged;

18. When you feel that the air conditioner is not used ideally, you should consult the instruction manual, analyze whether it is caused by improper use, and correct it after finding out the reason;

19. If you can't handle it by yourself after finding the fault, you can find a professional maintenance technician in the original installation department to solve it, or contact the local service personnel of the brand company. You can't repair it yourself or find a non-professional for maintenance

20. Unplug the power supply when the air conditioner is not in use;

21. The air conditioner must be restarted after three minutes after shutdown to protect the compressor;

22. The air conditioner with remote control (should not be placed at the children's easy access) should not be operated as a toy by children in order to avoid damage to the machine.

A new type of air conditioner that can continuously adjust the frequency or speed of the compressor within a certain range, can change the flow rate of the refrigerant, and exerts the ability to best match the environmental conditions, and automatically adjusts the output. The inverter air conditioner uses digital signal processing and analog control combined with artificial intelligence control. Compared with ordinary air conditioners, inverter air conditioners have the advantages of rapid and powerful cooling and heating, high efficiency and energy saving, comfortable and reliable, intelligent defrosting, large dehumidification, ultra-quiet, and wide voltage operation.

Air conditioning fault judgment

Common failure phenomena

• Dirty and ice blocks in the refrigeration system; air filters are blocked; air inlets and outlets are blocked by obstacles.

• The windings of the motor, the windings of the fan motor, the solenoid valve coil, the relay coil and the contacts were burned.

• Fans jam, bearings of moving parts jam, etc.

Failure judgment method

The basic methods for judging the common faults of domestic air conditioners are: see, listen, touch, measure and analyze.

1. Look : Carefully observe the working conditions of each component of the air conditioner, focusing on the three parts of the refrigeration system, electrical system, and wind system to determine whether they are working properly.

• Refrigerator oil). You can also use a clean soft cloth or soft paper to wipe the welded joint of the pipe and the joint, and observe whether there is oil stain to determine whether there is a leak.

2. Listen : power on and listen to whether the air conditioner compressor running sound is normal, whether there is abnormal sound, whether there is noise in the fan operation, whether the noise is too loud, etc. During operation, the air conditioner has slight vibration and low noise under normal conditions, generally below 50DB. If vibration and noise are excessive, the possible causes are:

• Foam plastic mats, etc., can increase the vibration and noise of the air conditioner during operation. This is especially noticeable when starting and stopping.

• If the chassis collides, the axis of the fan moves, and the blades will lose their balance. If there is a foreign object in the fan, the blades will collide with it.

3 Touch : Touch the relevant parts of the air conditioner with your hands to feel the hot and cold, chattering, etc., to help judge the nature and location of the fault. Under normal circumstances, the temperature of the condenser gradually decreases from top to bottom, and the temperature in the lower part is slightly higher than the ambient temperature. If the entire condenser is not hot or the upper part is slightly warm, or if it is hot, but the temperature of the two adjacent pipes is significantly different, it is abnormal. Evaporator Under normal circumstances, placing your fingers soaked in water on the surface of the evaporator will feel cold and sticky. The capillary at the dryer and outlet should have a warm feeling under normal conditions (slightly higher than the ambient temperature, which is basically the same as the temperature of the pipe at the end of the condenser). Etc. are not normal. The suction pipe at a distance of 200mm from the compressor should, under normal circumstances, be about the same as the ambient temperature.

4 Measurement : In order to accurately determine the nature and location of the fault, instruments and meters are often used to check and measure the performance parameters and status of the air conditioner. If you use a leak detector to check whether there is refrigerant leakage; use a multimeter to measure the power supply voltage, the current to ground and the running current of each terminal meet the requirements, and the air conditioner controlled by the computer should also measure whether the potential at each control point is normal.

5. Analysis : Most of the results obtained through the above-mentioned inspection methods can only reflect a certain local state. The various parts of the air conditioner are related to each other and affect each other. There may be multiple causes for a failure phenomenon, and multiple failures for one cause. Therefore, a comprehensive comparative analysis of local factors is required to comprehensively and accurately determine the nature and location of the fault.