Air conditioning is air conditioning, also called air conditioning. It refers to the process of adjusting and controlling the temperature, humidity, cleanliness, speed and other parameters of the ambient air in the building/structure by manual means. Generally, it includes cold source/heat source equipment, cold and hot medium transmission and distribution system, terminal device and other auxiliary equipment. It mainly includes water pump, fan and pipeline system. The terminal equipment is responsible for using the cold heat from transmission and distribution to specially treat the air to make the air parameters of the target environment meet the requirements.

trend

Future development

With the improvement of construction industry, industrial and commercial facilities and people's quality of life, people's demand for household central air-conditioning products is increasing day by day, and the demand range and level are also different.

central air-conditioning

It also presents a complex and diverse development trend. Compared with the domestic air-conditioning market, domestic central air-conditioning is still in the market introduction period, in a steady upward trend, and the market potential is huge.

In recent ten years, China's refrigeration and air conditioning industry has developed vigorously, with an average annual growth rate of 20%, even reaching 30% in some years and some products. The domestic central air-conditioning market presents the following three characteristics:

High-speed demand growth

The rapid development of central air-conditioning industry in China in recent ten years has largely benefited from the great development of real estate industry. 1999 the annual investment in fixed assets increased by 7% compared with the same period 1998. Among all the growth, real estate investment has the largest growth rate, with an average growth rate of about 18%, which is much higher than other fixed assets investment. Taking 1998 as an example, China's annual completed area reached17.09 million square meters, including 477 million square meters of urban housing and 433 million square meters of public buildings. The increase of real estate investment scale, especially the increase of office buildings and commercial buildings, will inevitably lead to the rapid growth of the total demand for central air-conditioning products.

Expand the scope of demand

The market demand of central air-conditioning industry has obvious regional characteristics, which is greatly influenced by local purchasing power, climate conditions and people's consumption concepts. pass by

Home central air-conditioned room.

China's domestic market itself has a large climate span, covering cold zone, temperate zone and tropical zone from north to south, so the overall demand for central air conditioning shows a downward trend from southeast to northwest. It can be seen that North China and East China, represented by Beijing and Shanghai, as political and cultural centers and radiation areas, mainly invest in office buildings, and the central air-conditioning market is concentrated here; Guangdong, represented by Guangzhou and Shenzhen, takes trade management as its regional feature, and real estate investment is mainly in commercial buildings. With the help of the "municipality directly under the central government" effect, the scale of real estate investment in Chongqing has risen rapidly, especially for commercial users. Therefore, the application of central air conditioning in Guangdong, Chongqing and other regions is mainly concentrated in commercial buildings. With the rapid development of local economy, the regional market demand for central air-conditioning products will grow steadily. At the same time, the demand for central air conditioning in office buildings, hotels, commercial centers, cultural and entertainment centers, national defense, scientific research, laboratories, hospitals, special industrial production enterprises and facilities in various regions will develop in an all-round way.

Diversification of demand levels

With the improvement of living standards of Chinese residents, the places where central air-conditioning products are used will undergo new changes and begin to expand to the lower limit of product use area. The introduction of domestic central air conditioning meets the needs of high-density residential and villa residents. Because this kind of products combines the advantages of home air conditioning and central air conditioning, it saves the outdoor unit and beautifies the community environment; At the same time, because of its good economic performance, it can reduce environmental pollution and will have great development in the future central air-conditioning market.

development direction

Humanization of design

The design of home central air conditioning adopts various air supply modes, and different schemes can be made according to the specific situation of room type to enhance the comfort of human body. The same space temperature difference 1℃, will not get "air conditioning disease". Choose one-sided air outlet or four-sided air outlet, and the design of home central air conditioning can also meet the needs of the current house according to the difference of apartment type, season and regional scope.

Fashionable appearance

Household central air conditioning can implement all-round solutions from design to installation according to users' needs and preferences. The system adopts hidden installation mode, which is more in line with fashion style and can better cooperate with high-grade interior decoration. At the same time, due to the reasonable placement of outdoor units, the overall appearance of the building will not be destroyed.

Energy consumption, energy saving, environmental protection and low carbonization

The household central air conditioner adopts modular host, which automatically adjusts the cooling capacity according to the setting. The reasonable way is to install air conditioners in the daytime living quarters and the nighttime living quarters respectively, and control the rooms in different areas, and operate independently indoors to adjust the air in each area respectively. According to the actual load, the heating and cooling costs are directly converted into electricity charges, saving energy and operating costs, and saving electricity by 30% compared with household air conditioners.

Excellent quality

The household central air conditioner has the advantages of reliable operation, extremely low failure rate and minimal maintenance, and its service life is twice that of ordinary household air conditioners, reaching 15 -20 years. Household central air conditioners are of high quality and more durable than ordinary air conditioners. It is also more comfortable to use. Household central air conditioning adopts the installation method of separating the main unit from the indoor unit. The design of air supply and return system is reasonable and the noise is extremely low, which ensures a quiet home environment. So that the indoor air distribution is more reasonable. Therefore, the indoor temperature is uniform, with small fluctuation, which brings higher comfort to people.

Central air conditioning is to connect a host computer with multiple terminal devices through air pipes or refrigerant pipes to control different rooms and realize indoor air conditioning scheme.

Engineering drawing of household central air conditioning

Equipment. Using duct air supply mode, a host computer can control many different rooms, introduce fresh air, and prevent the occurrence of air conditioning diseases. The most prominent feature of home central air conditioning is the comfortable living environment. Secondly, from the aesthetic point of view and the best use of space, the use of home central air conditioning makes indoor decoration more flexible and easier to achieve various decorative effects. Even if you don't like the original decoration and redecorate it, the original central air conditioning system can be in harmony with the new decoration as long as it is slightly modified. Therefore, domestic central air conditioning is called a one-step choice that never lags behind. Household central air conditioning (or household central air conditioning, unit adjustable central air conditioning) refers to air conditioning that generates cold (hot) sources through outdoor machines and then supplies cold (hot) to each room. Which belongs to a (small) commercial air conditioner. Household central air conditioning is divided into air system and water system. The air system consists of outdoor unit, indoor main unit, air supply pipeline, air outlets in each room and regulating valves. The water system consists of outdoor unit, water pipeline, circulating water pump and indoor terminal (fan coil unit, exposed equipment, etc.). ).

Home central air conditioning has high technical content, excellent performance such as independent billing and power failure compensation. Through ingenious design and installation, it is the development trend and destination at home and abroad to realize the harmonious unity of beauty, elegance, comfort and hygiene.

Compared with ordinary split air conditioners, domestic central air conditioners have incomparable advantages (in terms of energy saving, the basic energy efficiency of DC frequency conversion of domestic central air conditioners is above the national level, and the energy efficiency ratio of concealed air duct machines is basically above the second level). Their internal machines have more than a dozen styles, such as ceiling embedded, card-type, concealed floor-standing and so on. Each style has many corresponding models and hundreds of air supply methods to choose from. This provides users with many choices. There are also many decoration schemes that match the interior decoration for users to choose, which can really meet the individual needs of users.

Product feature editing

Four seasons management

The refrigeration unit runs in summer to realize the cooling capacity adjustment; In winter, the cooler can be used together with the heat source to realize heating in winter.

Home central air-conditioned room.

. In spring and autumn, fresh air can be used to supply air directly, and one device can be used for multiple purposes. Energy-saving, comfortable and good.

Good comfort

The design of central air conditioning is adopted, with large air supply, few outdoor units, low noise, small air supply humidity difference and uniform room temperature. Different from split air conditioning, there is only one air supply mode. Home central air conditioning can realize a variety of air supply modes, and different schemes can be formulated according to the specific situation of room type to improve human comfort. The wind speed and temperature of air supply are very suitable for people, so that people will not get "air conditioning disease". At the same time, reduce the indoor air humidity, achieve the best matching of temperature and humidity, and increase comfort.

Good hygiene requirements

Central air conditioning can reasonably supplement fresh air, cooperate with the exhaust of kitchen and bathroom, ensure the freshness and hygiene of indoor air, and can also ventilate all the year round to meet the health requirements of human body. Split air conditioner does not have the above functions, and can only simply heat and cool.

central air-conditioning

Beautiful appearance

According to users' needs and preferences, we can implement comprehensive solutions from design to installation. The system adopts concealed installation mode, which can cooperate with high-grade interior decoration. At the same time, due to the reasonable placement of outdoor units, the overall appearance of the building will not be destroyed.

Energy efficient

The most advanced DC frequency conversion technology is adopted, and the refrigerant flow is automatically adjusted by solenoid valve to control the refrigeration capacity.

Quiet operation

The installation method of separating the main machine from the indoor machine is adopted, and the design of the return air system is reasonable, the number of outdoor machines is small, and the noise is extremely low, thus ensuring a quiet home environment.

Flexible and convenient

According to the needs of users, one device can provide cold air for two environments in a switching mode. The system host is equivalent to a small central air conditioner, which can be installed in a hidden place such as a balcony or storage room, and can meet the cold and hot needs of multiple rooms at the same time. Intelligent controllers are installed in the equipment room of each room, which can be controlled independently, and the temperature can be adjusted and started and stopped at will.

Heating operation adapts to local conditions.

You can use hot water for central heating, or you can install a small wall-mounted gas water heater as energy. Hot water coil heating is more practical in winter. Heat pump air conditioner can be used for heating. When the heat is insufficient, use gas water heater and hot water coil for heating.

useful

Reliable operation, extremely low failure rate, convenient maintenance, repair and cleaning, and its service life is twice that of household air conditioners, reaching 20 -50 years.

conservation of energy

With the improvement of housing conditions, how to configure air conditioning has become a headache for many families. If every room is equipped with an air conditioner, it will not only affect the beauty of the house, but also consume a lot of electricity when several air conditioners are used together. Compared with ordinary split air conditioners, domestic central air conditioners solve the above problems well and have many advantages that ordinary split air conditioners cannot achieve.

High comfort

Household central air conditioner realizes the air conditioning of all room spaces as a whole, and overcomes the shortcomings of split wall-hung and cabinet air conditioner in local treatment of room division and uneven air flow, so as to make the air distribution in the room more reasonable. Household central air conditioning can realize uniform indoor temperature with small fluctuation, which brings people higher comfort.

Fresh and healthy

Home central air conditioner is equipped with fresh air device, which can keep indoor air fresh by introducing fresh air, effectively improve indoor air quality and avoid the trouble of "air conditioning disease".

Beautiful and elegant

Home central air conditioning can be designed and installed skillfully to achieve harmony and unity with the overall decoration. The main machine is placed in the hidden place of the balcony, and there are many options for the installation of the indoor machine. According to the preference of house decoration, you can choose side air supply or down air supply, and use the ceiling to place the indoor unit in the ceiling. Compared with the split wall-mounted air conditioner, the refrigerant connecting pipe is exposed indoors, and the home central air conditioner will not affect the indoor decoration style. When you enjoy the cool breeze brought by air conditioning, you can't see the messy indoor connecting pipes. There is no outdoor machine that affects the appearance of the building.

trend

Home central air conditioning has been widely used in apartments, family houses, villas and other buildings in Europe, America, Singapore, Japan, China, China, Hongkong and Taiwan Province Province of China. According to statistics, 72% of households in the United States have air conditioners, of which 48% are small central air conditioners, and 24% are window machines and split machines. In China, 90% of household air conditioners are ordinary household air conditioners. With the continuous improvement of people's living standards and unremitting pursuit of quality of life, home central air conditioning will become the mainstream of China market.

Limited editing

Home central air conditioning has the nine advantages listed above, but it also has its own limitations:

Design and installation

Due to the characteristics of household central air conditioning, many matters must be determined before decoration. During the decoration process, the position of central air conditioning should match the decoration style, and the necessary installation position should be reserved for central air conditioning. Harmonious combination with home decoration itself, only in this way can we achieve the expected decorative effect.

Installation step

Installation method and steps of household central air conditioner

Home central air conditioning is different from other traditional household appliances. In fact, central air conditioning is only a semi-finished product. After equipment and materials are purchased, system design, installation and debugging are required. These processes are no less than equipment selection. It can be said that the installation quality of central air conditioning determines the overall effect of central air conditioning. The installation of household central air conditioner lies in the handling of details, which needs to be coordinated with decoration to achieve the effect of paying equal attention to function and beauty.

The installation of central air conditioning must be prepared before decoration, the installation position of internal machines must be determined in advance, and the required strong electric wires must be pre-arranged. General plumbers can arrange construction and installation after entering the site. Household central air conditioning is divided into three installation methods:

First installation (contact for installation when water and electricity enter the site): ① Hoist the indoor unit of central air conditioner and wrap it to prevent dust and impurities from entering; ② Installation of exhaust pipe: refrigerant pipe, condensate pipe and signal line.

Second installation (24 hours after the first installation) ① Hoist the outdoor unit of the central air conditioner; ② Add refrigerant, test the central air conditioning system, and measure the size and position of the tuyere.

Install the tuyere for the third installation (after the second installation or the next day), and finally run the equipment for testing.

A good horse should be saddled, and the preparation of relevant information can not be ignored. Many installation links are due to problems with auxiliary materials, which finally affect the overall use effect. There are five key auxiliary materials that need our special attention:

Selection of auxiliary materials for installation of household central air conditioning

① Refrigerant copper tube: The refrigerant operation of central air conditioning directly determines the use effect, so the quality of refrigerant copper tube is very important. The pressure in the tube of traditional R22 refrigerant (Freon) is generally about 20kg, while the pressure in the tube of new refrigerant R4 10 reaches 36kg. Therefore, the central air conditioner using new refrigerant needs to choose better quality refrigerant copper tube.

② Copper tube insulation: The operation of refrigerant directly determines the use effect, and copper tube insulation cannot be ignored. The two brands with relatively high market share are Hongtai and Huamei, and the wall thickness of insulation pipes of both brands has reached a certain standard, which can effectively play the role of insulation and is trustworthy.

③ Condensed water pipe: The condensed water pipe is hidden in the ceiling and will be closed at last. Although its quality will not affect the effect of air conditioning, once it leaks, it must be repaired by removing part or all of the ceiling or even knocking on the wall to pry the floor (brick), and the consequences are very serious. Generally, the condensation pipe is made of Wuhan Liansu PVC water pipe, and the sewer pipe can also be used, and the upper pipe is more effective.

4 tuyere: small parts are often ignored by many consumers, but this part has a great influence on the interior decoration effect. There are two common tuyeres: one is ABS tuyere and the other is aluminum alloy tuyere. Both tuyeres have their own advantages and disadvantages. ABS tuyere is made of ABS engineering material, which is not easy to condense. However, the material has a certain coefficient of thermal expansion and contraction, and it may squeak during use, and the tuyere may arch slightly when the temperature is low in winter. After long-term use, the tuyere will turn yellow and it is not easy to clean. Aluminum alloy tuyere, the advantage is not easy to deform, not easy to change color. However, due to the very fast heat transfer speed of aluminum alloy, it is easy to condense in summer. Will produce serious water droplets. The two tuyeres have their own characteristics, and you can choose according to your own needs.

⑤ Signal wire: The signal wire is not expensive, and generally the signal wire with shielding layer is used, so there is basically no problem.

power requirement

Household central air-conditioning needs a large power load, and the owners of ordinary old-fashioned houses should focus on whether the circuit load in their homes is sufficient before buying household central air-conditioning.

Maintenance editor

Family maintenance

As the "lung" of modern architecture, central air conditioning system bears the heavy responsibility of creating and maintaining a warm indoor air environment. If the work is not good, it will not only cause poor air conditioning effect, but also cause problems such as high energy consumption and many equipment failures. Among them, the maintenance of central air conditioning is the most important part.

The fundamental purpose of home central air conditioning maintenance

Meeting application requirements is the main purpose of system operation management and maintenance. For an enterprise, all the work done by the operation and management of the central air-conditioning system, from top management to guidance and staff, should be clearly intertwined, all in order to meet the use requirements, reduce operating costs and extend service life. That is, the most economical cost is exchanged for the highest comprehensive efficiency and the greatest economic benefit is obtained.

Maintenance of household central air conditioning to reduce operating cost

In addition to labor costs, operating costs mainly include energy consumption and maintenance costs; According to statistics, the annual operating cost of machines that are maintained in time according to the requirements of manufacturers will be reduced by 10%-20%. For example, suppose the electricity consumption of air conditioning is 100KW, the cooling season is 4 months, the heating season is 3 months, the average daily running time is 10 hour, and the annual running cost is 100KW× 10 hour/day× 30 days/month× July/year. If calculated according to the commercial electricity charge 1.2 yuan/kwh, the annual operating cost is 252,000 yuan, which can reduce the operating cost by 25,000-50,000 yuan/year.

Maintenance of household central air conditioning and extension of service life.

The service life of central air-conditioning piping system, control system and terminal installation is relatively short, which directly affects the depreciation period of equipment and the investment of renewal funds. Therefore, the service life should at least reach the expected service life, and it is better to exceed it, so that the renewal funds can be invested later, thus reducing the whole operating cost. According to statistics, we should be good at maintaining the unified life of the central air-conditioning system for a long time, and be good at machines that are not in place or not in place for 2-5 years.

As a systematic project, central air conditioning has a large one-time investment and many types of equipment, and its operation, maintenance, maintenance and overhaul are indispensable. As a leading expert in indoor heating environment in China, the main service object of warm 100 network central air conditioning system is people. The primary task of central air-conditioning system maintenance and supporting is people-oriented, ensuring the requirements of indoor air environment and achieving the best heating and cooling effect.