【 Weak current College 】 small central air-conditioning installation problems---Power By 【 China power house network 】

In recent years, with economic development, the improvement of living standards, being a luxury apartments, small office buildings, villas, House, Penthouse, small size (about a few hundred square meters or so) demanding architectural type. Air conditioning industry urgently needs a product, to the advantage of both together. Some companies see this market, launched the small central air conditioning system. The system has inherited the central air conditioning system with good results and flexible arrangement of household air conditioners and highly intelligent features. From the cost, the small central air than traditional air conditioning cheap 30%-50%. Currently on the market of small central air-conditioning mainly has following several: a, household gas-fired air conditioning air-conditioning started in the 1930s in Sweden, it uses the low grade of gas to energy, energy-saving effect is remarkable. Over the past 10 years, due to the growing problem of energy, power shortages, United States, Switzerland, Germany, Japan's air conditioning industry has developed a number of excellent energy-saving effect is very significant conditioner. Common conditioner has three forms: lithium bromide absorption, ammonia absorption and gas heat pump. Currently on the market to lithium bromide absorption gas air conditioning, usually by means of gas-fired air conditioning LIBR absorption of ammonia gas-fired air conditioning system, air conditioning and gas gas heat pump applications. As China's energy structure changes, natural gas in total energy consumption in proportion to the growing use of air conditioning can simultaneously address consumption in summer too small and too concentrated power, the problem of insufficient power supply. Achieve reductions of peak power, energy balance. With gas prices much lower than the price of gas from the implementation of the strategy, the development of gas-fired air conditioning and bright future. Need to make is that the gas-fired air conditioning refrigeration cycle low thermal coefficient, some constraints on their development. On this issue, to be further development and research. Second, air source heat pump air heat pump is the main form of conditioning, in room rooms, penthouse floor structure, small villas in the broader application, its forms are the three major: (1), type of household air-source heat pump, central air conditioning blowers group produce thermal (cold) wind, like road into the room, compared to other household air conditioning system, which means less investment, and the introduction of fresh air, can realize the indoor and outdoor air circulation, no difference in each room, you can improve the indoor air of ecological housing environment and thermal environment of effective technical means, but building storey need meet wind pipe layout requirements. (2), air-cooled heat pump, Central produce thermal (cold) water, to the air conditioning terminal devices (such as fan coil units, air supply unit, etc.) in the way convenient control and Terminal number matching flexible, construction area of relatively large occasions also applies. But the presence of condensation water discharges and water leakage problems, cost relative to the other two air-source heat pump system is relatively high. (3), the central air conditioner VRV frequency, that is, the current market often referred to as "a few" air conditioning. It is a fluorine, en direct cooling and heating with heat pumps and air conditioning, a desk with several indoor and outdoor unit, each room separately control. Its advantage is that the system is simple, and there is no architectural layers high. Its disadvantage is not easy to leak detection, refrigerant volume decrease occurs, but find no fault in leak location, you can only rely on the continuous supply of refrigerant to maintain the normal operation of the air-conditioning system. 3, water source heat pump water source heat pump is in fact used for the whole building or large living area, etc. Here, we do it is because the air conditioning system to host distributed to each of the air-conditioned area, making it possible to reach extension adjustable, not one or two of use and to start the whole system, resulting in a waste of energy, and a separate kWh meter with users connected burden on the user's own cost. Water source heat pump system mainly two kinds of system: closed-loop water source heat water air conditioning system (central heat stations dispersed all household water source heat pump unit) and the central water-source heat pump hot water system (large water-source heat pump chiller plus indoor air blower plate Tube). Water source heat pump system is electric powered, water as a source of cold (heat). Compared with the air-source heat pumps, high performance coefficient, and is not affected by the outdoor temperature, more suitable for the northern region. The disadvantage is the high initial investment. Currently on the market than the applicable water source heat pump system is a closed loop water water-source heat pump system, it is a double tube closed water systems, parallel connection residential buildings located in each household's water source heat pump unit, summer end unit with circulating water to cool, winter away from heat circulating water. Indoor air flows through the turbine room side of the heat exchanger (summer-winter-evaporator, condenser), like tube system into the main room with air conditioning and heating. The system is installed in a room thermostat for unit commitment and adjust the room temperature, and a separate measurement. Closed water loop without insulation, all lines are almost all in the building, and the circulating water temperature is moderate, not in the pipe surface condensation or substantial loss of heat. 4. heat pump systems utilize the regenerative properties of the soil, advantage buried in the soil of heat pipes for heating and heat exchange, winter, cooling in summer. Its characteristics are placed at will, does not occupy the surface of the external space, take full advantage of the natural low grade heat, energy saving and environmental protection. Its disadvantage is involved hydrogeologic, shall collaborate; higher initial investment system; can cause soil heat to the building as both have a certain influence. The system currently used in small villas. On the small central air-conditioning installation, there is no dedicated standard, mainly with reference to the large central air conditioning and air conditioner installed the corresponding specification. The wind pipes, water pipes can reference a large central air conditioning refrigerant piping is installed, you can reference the household air-conditioning installation; indoor air layout reference large central air conditioner, while outdoor machines installed then you can reference the household air-conditioning installation. In addition, in the small central air conditioner is installed, there are several points to the problem:
1. small central air-conditioning of indoor unit is generally installed in the ceiling, in determining their install location, you should be aware of: (1) indoor installation location near cannot have power (such as electric heaters, gas stoves, etc.) and the steam source, etc. (2) blow out of the air flow through the human activities should be the main plants, no obstructions in the vicinity of the exhaust outlet. (3) host to distance TV, audio, etc. to avoid a meters above the mutual interference.

(4) the air inlet around do not prevent the inhalation of air in placing obstaclesObstructions. (5) away from heat and gas supply Department. (6) at both ends and should leave room for the above. (7) don't get close to high-frequency equipment, high power wireless devices, so as not to interfere with the normal working air conditioning. 2. in determining the small central air outdoor machine installation location, you should be aware of: (1) small central air outdoor machine is generally higher than the domestic split-type air-conditioning, outdoor machine should be installed in the ground or be able to host its weight on the roof, as a result of conditions necessary to take measures to secure fixed (some larger unit cannot mount). (2) to avoid installation in places where combustible gas leak. (3) to keep the air flowing around the outdoor unit, should be left around a certain space. (4) avoid sunshine directly, if necessary with a sun visor, but does not impede ventilation. (5) select the outlet no obstructions. 3. when the installation should be close coordination of the decoration project. Small central air-conditioning at installation time, particularly in the residential installation, the use of each room, decorated in different styles, such as: ceiling height, materials, lighting, such as the layout. During the installation of a small central air-conditioning before must conscientiously to distinguish between the use of the rooms feature, combined with decoration requirements determine how to air from downward and feed back or side of air, and then determine the style of the diffusers. In a outlet lifting units and installation, to acquire all the room ceiling height and material practices, choice of appropriate installation, so you can make new air conditioning system to comply with the safe, practical, aesthetic requirements. To sum up, although the small central air conditioning in our short history, and some of the technology has not matured, but it's there, after all, fill the air conditioning field, it makes small construction and residential customers can enjoy a higher quality of modern air conditioning, also allows existing air-conditioning industry become diversification, both from a technical or market prospects, the small central air conditioning are also huge space for development. As a construction enterprise, you must grasp the development direction of the market, constantly mastering new technologies and new techniques in order to be in a competitive market.
Editorial: Shin Bo Hun