Classification of main components:
1. According to the medium used to bear indoor heat and humidity load, it can be divided into:
1. Total air system 2. Full water system 3. Air-water system. cooling system
2. According to the concentration of air treatment equipment, it can be divided into:
1. Centralized 2. Semicentralized
3. According to the source of air to be treated, it can be divided into:
1. closed type 2. Dc type 3. Mixed type (primary return air and secondary return air)
The main equipment consists of air conditioning host (cold and heat source) and air cabinet fan coil unit. [Edit this paragraph] Central air conditioning installation, home central air conditioning purchase installation five steps.
Step 1: Determine the host model.
First of all, we should consider the area and orientation of the house to see if there are large glass windows, so as to calculate the maximum simultaneous use coefficient of air conditioning. Generally speaking, in the ordinary home environment, the cooling capacity required for actual use is often not all rooms are cold.
The amount of synthesis is lower than the latter, and the former only needs to reach about 60% to 70% of the latter. This can save investment and avoid unnecessary waste. The actual cooling capacity of the room can be calculated by the following formula:
Actual cooling area = building area × building utility rate ×65% (excluding non-cooling areas such as kitchen and toilet).
Actual required cooling capacity = actual cooling area × cooling capacity per unit area
Note: The refrigerating capacity per unit area depends on the specific situation, and it is generally 100 150 W/m2 for domestic use. If the room faces south, the floor is high, or there is a large area of glass wall, it can be appropriately increased to about 170 200 watts/square meter.
Step 2: Determine the indoor unit and tuyere.
Determine the model according to the actual cooling capacity. Only one indoor unit or air outlet is needed for each room or hall. If the living room is large or rectangular, you can add an indoor unit or tuyere. The requirement of about one horse per 12 square meter shall prevail.
Step 3: Determine the air conditioning layout:
1, the location of the main engine should be well ventilated and heat-dissipated, which is convenient for maintenance. At the same time, the location should be hidden as far as possible to avoid affecting the appearance of the house and the indoor noise;
2. The location of the indoor unit should match the layout of the indoor decoration, which is generally hidden in the ceiling or the top of the high cabinet. Generally, indoor machines are ultra-thin and can only be placed at a height of about 25 cm. Pay attention to good return air during installation to make indoor air circulate and ensure air conditioning effect and air quality;
3. Pipeline layout: the refrigerant pipeline of the water chiller is relatively thin, so it is easy to hide even if the insulation layer is wrapped outside; The pipeline needs full thermal insulation, and the pipe fittings, valves and fittings in contact with the pipeline should be wrapped in thermal insulation to prevent the leakage of condensed water; Generally, PP R pipe, PVC U pipe or aluminum-plastic composite pipe is selected as the pipe material, which can ensure no damage for 50 years. All condensed water is concentrated or hidden nearby;
4. The indoor machine can be equipped with negative ion generator and purification and dust removal device according to the user's requirements, so as to further improve the indoor air quality.
Step 4: Choose the product that suits the price.
The price of domestic central air conditioner is around 300 350 yuan/m2. Brand, model and users' own needs, such as choosing inverter and non-inverter air conditioners, cooling or single cooling, will lead to price differences.
Step 5: Select the service.
Compared with ordinary split air conditioners, domestic central air conditioners are actually a "semi-finished product" because they have to cooperate with indoor decoration. The service of home central air conditioning includes not only after-sales service, but also pre-sales consultation, scheme design, installation and construction. It can be said that the design, installation and construction are as important as the host equipment to make a home central air conditioning system run normally.
Therefore, when purchasing home central air conditioners, users must choose enterprises with good service and good reputation to protect their own interests.
Three indexes of air conditioning quality
Refrigeration (heat), energy efficiency ratio and noise are the three most critical indicators to measure the quality of air conditioning.
Refrigeration (heat) quantity
The legal unit of measurement is W (Watt), which is the heat taken away from the enclosed space by the air conditioner during the unit cooling (heating) operation time.
According to national standards, the actual refrigeration capacity of air conditioners should not be less than 95% of the rated refrigeration capacity.
Energy efficiency ratio
Also known as performance coefficient, it refers to the ratio of refrigeration capacity to refrigeration power of air conditioner during refrigeration operation, and the unit is w/w.
According to the national standard, the standard value of energy efficiency ratio of 2500W air conditioner is 2.65; The standard value of energy efficiency ratio of 2500W to 4500W air conditioners is 2.70.
noise
The noise generated by air conditioning operation is mainly generated by internal evaporator and external condenser.
According to the national regulations, the noise of indoor units and outdoor units of air conditioners with refrigeration capacity below 2000W shall not be greater than 45 dB, and the noise of indoor units and outdoor units of split air conditioners shall not be greater than 48 dB and 58 dB respectively.
Eight Points for Attention in Choosing Home Central Air Conditioning
Choose according to your own needs. Owners must pay attention to the following points when choosing home central air conditioning:
First of all, according to your own room structure, choose the appropriate home central air conditioning.
Second, according to the matching power supply of 220V or 380V in the house, choose home central air conditioning.
Third, according to the purpose and function of the room, choose the energy control of household central air conditioning.
Fourth, pay attention to the brand of household central air conditioning units. A company should choose a manufacturer with a production base, so that the service can be guaranteed.
Five, the design and installation of home central air conditioning, we must consider the effect of home decoration, so as to achieve beautiful coordination.
Six, the design and distribution of household central air conditioning system, must have air conditioning professionals to check.
Seven, the installation personnel must undergo professional training, approved by the manufacturer, before construction operation.
Eight, the installation of supporting materials must have a quality certificate, performance test report, to ensure the stability of quality.
Five Skills of Choosing Home Central Air Conditioner
1. Different from the installation method of ordinary air conditioners, the design and installation of small central air conditioners must be carried out through the ceiling (even the ceiling of the bathroom) or put into the closet before room decoration, so that the owner can't be seen in the room, and the overall pattern is more concise and beautiful. It is best to install this design project during the construction process, otherwise it will affect the later decoration.
2. General household central air conditioning has no fresh air system. Even the air heat pump can only achieve 15% fresh air replacement. If you want to achieve better results, you need to add a fresh air system. For example, Beijing Sunshine 100 International Apartment is going to add fresh air system in addition to its central air conditioning system.
3. The outdoor environment of home central air conditioner may produce certain noise, but it is not very loud, so it is best to install it on the balcony far away from the bedroom.
4. The outdoor opportunity balcony covers an area of about 1 m2.
5. The service life of general household central air conditioner is about 15 years, and the owner needs to pay for replacement.
10 factors of purchasing household central air conditioning.
1, select. Choose a home market where consumers are satisfied or the after-sales service is reliable.
2. Go shopping. For goods of the same style and brand, quality, price and service should be considered comprehensively.
3. Function selection. When purchasing a central air conditioner, we should consider the functions of the air conditioning system, such as heating, adding ventilation and humidification functions, filtering and dust removal functions, and adding fresh air pen sterilization functions.
4. Decoration. Because the home central air conditioner is installed first and the decoration work is behind, the decoration scheme must be determined when installing the home central air conditioner. On the basis of ensuring the effect of air conditioning, it is necessary to determine the installation position and air duct direction of the indoor unit of air conditioning. The indoor unit is generally installed in the local ceiling outside the corridor, and the air duct can be concealed by the local ceiling, and then the size and position of the exposed air supply outlet and air return outlet can be determined.
Step 5 heat up. Generally speaking, it is not recommended to put heating and air conditioning together in single-family houses. There are two reasons: first, continuous heating should be maintained throughout the heating period, and the use of air conditioning system functions requires that power and water should not be cut off, otherwise the system will stop. Even if no one lives, it is necessary to ensure low-level heating to prevent indoor freezing; Second, a household heating requires higher equipment. Once a fault occurs, it is required to be eliminated as soon as possible. Only users or property departments have the ability to maintain, can we ensure uninterrupted heating. Therefore, the best situation is to provide heating or hot water uniformly by the property, so as to ensure uninterrupted and avoid adverse consequences.
6. Installation authorization. In order to ensure the installation quality and future use effect, only the company authorized by the manufacturer has the right to install the corresponding household central air conditioning system. Pay special attention to system warranty and host warranty are not the same thing. Air-conditioning manufacturers guarantee the performance of air-conditioning machines, and the system effect is guaranteed through correct design and installation.
7. System acceptance. The function of the system is 30% in rational design, 20% in the quality of air conditioning units and 50% in the quality of installation. Because the units are mostly concealed, the system acceptance must be carried out after installation to ensure the use effect.
8. After installation, don't forget to ask for warranty.
9. Invoices and contracts must indicate the brand, specification, quantity, price and amount of household central air conditioning.
10, know the name, address, contact person and telephone number of the organizer and manufacturer, so as to solve the quality problem in time.
Common sense of central air conditioning installation
(1) choose large machines over small ones, thinking that the number of air conditioners can be reduced with a small population and few rooms, which is incorrect.
② The outdoor unit must be placed in a well-ventilated place. If the ventilation is not smooth, the air conditioning capacity will be greatly affected.
(3) indoor machine generally don't put in the bathroom or the top of the kitchen. If it must be placed, it is necessary to make a good return air plan, and do not put it in the bathroom or kitchen return air outlet.
(4) The indoor machine should be provided with a passage to ensure future maintenance.
⑤ Location of the air supply outlet Select the location of the air supply outlet to make the wind energy circulate in the air-conditioned area.
⑥ The size of the air supply outlet shall ensure a certain air supply outlet size. Too many air outlets will affect the air conditioning effect.
How to choose a house with home central air conditioning is becoming more and more spacious and decorated more and more exquisitely? With the increasing demand for beautiful indoor environment, household appliances have become a part of family decoration. The defects of single style and heavy appearance of ordinary air conditioners are exposed at once, which can no longer meet people's diversified needs. While ordinary air conditioners are left out in the cold, home central air conditioners are gradually accepted by the public because they can match the home style well and achieve beautiful and harmonious effects. In view of the hot sale of household central air conditioners in the market, experts remind consumers that the choice of central air conditioners should be tailored to their own house structure and expected decoration effect. The layout of some houses is not suitable for installing central air conditioning. If installed blindly, it will not only affect the use effect, but also cause unnecessary troubles such as rework.
How to choose air conditioning according to the room system? Residential buildings with a floor height of less than 2.7 meters and a total area of less than 100 square meters are not suitable for installing central air conditioning. If the height of the house is less than 2.7 meters, the height will be less than 2.4 meters after installing central air conditioning, and people will feel "top-heavy" in it, which will affect the living comfort. Therefore, it is best not to choose central air conditioning for houses below 2.7 meters. Even if central air conditioning is installed, it is necessary to adopt the method of local ceiling to avoid large-scale oppression. Household central air conditioning also has certain requirements for housing area. If the total area of the house is less than 100 square meter, it is not cost-effective. In this case, ordinary air conditioning is a wise choice. In addition, pay attention to the placement of outdoor units. Outdoor units generally need 0.6 to 1 m3 of space. If there is not enough outdoor space, it will bring a series of problems to installation and use.
A house that is really suitable for installing domestic central air conditioning needs to meet the following two basic conditions: first, the house should be high enough with a floor height of at least 2.7 meters; Secondly, the area should be large enough, with a total area of 100 square meter. Because there are many kinds of home central air conditioners on the market now, even if the room meets the above standards, it should be selected according to the specific situation. At present, there are several kinds of household central air conditioners in the market, such as water pipe type, air pipe type and frequency conversion multi-connection type. Among them, the water-tube household central air conditioner is the miniaturization and localization of central air conditioner, and its working principle is the same as that of large central air conditioner. It can choose different temperatures according to the actual situation of each room, and the comfort is quite high. Known as "real household central air conditioning", the most representative is the water pipe household central air conditioning. This kind of central air conditioning is mainly suitable for duplex houses, villas and other large-area houses with a total area of more than 200 square meters. In terms of comfort, the air duct household central air conditioner is worse than the water pipe household central air conditioner, and the height of the house is higher because the air duct is thicker and the ceiling needs to be thickened. Generally speaking, a house with a floor height of at least 3 meters but a small total area is more suitable for air duct household central air conditioning. Frequency conversion multi-family central air conditioner consumes a lot of energy and has poor comfort, but it can also be used as a more economical and reasonable choice for some families because of its low price. This multi-connected household central air conditioner is usually suitable for rooms with a total area of only 100 square meters.
The rise of the home center makes the living room more beautiful. While paying attention to the coordination of indoor environment, consumers should remember to choose the most suitable central air conditioner according to the building structure in order to achieve the best use effect. Some well-known manufacturers, such as Tsinghua Tongfang, have begun to "tailor-made" the most suitable air conditioning system scheme for users according to different needs of consumers, and professional installation makes the effect more secure. Starting from the actual demand, coupled with the all-round professional services of well-known brands, it is no longer far away for consumers to enjoy the "star-rated" indoor environment brought by household central air conditioning.