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Daikin FVXS25F Floor Standing Inverter
2007-10-30 22:33:00
The FVXS50F incorporates dual air discharge for superior heating comfort and a programme dry dehumidification function, and operates in temperatures between -15 and 46 degrees.Features:24-Hour On/Off TimerThe timer can be preset to start and stop the air conditioner at any time within a 24 hour period. Once the times are set, the air conditioner can be operated for a period by simply pressing the ON or OFF timer buttons.Anti-CorrosionThe special anti-corrosion coating on the outdoor unit heat exchanger ensures greater resistance to salt damage and atmospheric pollution.Auto Fan SpeedTo reduce operating noise, the fan speed is automatically controlled by the microprocessor to suit the thermostat setting and room temperature.Automatic OperationFor unattended year round comfort, this function allows the unit to automatically switch between heating and cooling modes as required.Auto-RestartThe unit memorises the operation mode, air flow setting, temperature and timing settings so that, ...
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Daikin FTYN25D
2007-10-29 22:24:00
The FTYN25D has automatic restart after power failure and program dry dehumidification function. A Daikin Split System will air condition one room or an area of your home. Discreet wall-mounted models, compact floor consoles and versatile floor and ceiling units are all part of the Daikin range.Create perfect conditions all year round with Daikin reverse cycle split system air conditioners.Features:Power-Airflow Dual FlapsThis unique system directs warm air to the floor in winter and cool air upwards in summer for maximum efficiency and comfort. The large flap governs airflow direction while the small flap (or diffuser) swings, producing fine air currents that help circulate the air around the room.Wide Angle LourvesWide angle lourves with their innovative curved design, provide air flow coverage to effectively cool/heat, no matter where the indoor unit is placed in the room.Vertical Auto-Swing (up and down)The small flap in the indoor unit automatically swings up for finely tuned a...
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Daikin FTXG25E
2007-10-29 22:14:00
The FTXG25E air conditioner is stylish, slim and compact, quiet and clean, and cools in outdoor temperatures of up to 46 degrees. It is available in Mat Crystal White or Mat Crystal Silver to suit any decor.Features:Wide Angle LourvesWide angle lourves with their innovative curved design, provide air flow coverage to effectively cool/heat, no matter where the indoor unit is placed in the room.Vertical Auto-Swing (up and down)The small flap in the indoor unit automatically swings up for finely tuned adjustments of the air current. When the unit is switched off the louvre closes automatically.Horizontal Auto-Swing (left and right)The wide-angle louvres automatically direct horizontal airflow to achieve a uniform temperature throughout the room.3-D AirflowCombines Vertical and Horizontal Auto Swing to circulate cool/warm air to the corners of large spaces.Comfortable ModeThe new flap changes the delivery angle to horizontal for cooling and vertical for heating operation, to prevent co...
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Daikin split system tapes of air conditioner
2007-10-29 22:10:00
Wall mounted designsDaikin's wall-mounted split system air conditioners are an exceptional choice for those wanting a neat unit that blends unobtrusively with its surroundings.The same advanced technology that makes the Daikin indoor unit so compact also makes it powerful, yet extremely quiet, and kind on energy costs.The pleasing design of the units also has functional appeal. The smooth surface of the flat panel models can be wiped clean and the flat panel easily removed for more thorough cleaning.Daikin's air purifying filters and innovative air flow systems ensure that fresh, conditioned air flows to every corner of the room.Floor standing unitsDaikin's floor-standing split system air conditioners are compact and ideal for those wanting to position their unit at ground level.They can even be semi-recessed into the wall. The units use either top, or top and bottom discharges with wide-angle louvres and top discharge auto-swing to efficiently distribute air right across the who...
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Daikin Technology
2007-10-29 22:06:00
Daikin's advanced technology includes many innovative and patented features that are designed to make our units quieter, more energy efficient, and easier to control.An easy-to-operate remote control and programmable settings help to ensure the temperature in your home is just they way you like it, when you like it.Daikin's Inverter DifferenceDaikin Inverter air conditioners are more powerful, however, they are also more energy efficient than conventional, non-inverter models. Conventional air conditioners operate at a fixed speed, delivering a fixed amount of cooling and heating. While trying to maintain a set temperature they operate on a ‘stop/start’ principle.A Daikin Inverter has a more advanced technology that operates differently. It works like the accelerator of a car, gently increasing or decreasing power. It reaches the desired temperature quicker and steadily maintains it without wild fluctuations. That means uninterrupted comfort and significant savings on running ...
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Air conditioning applications
2007-09-23 23:04:00
Air conditioning engineers broadly divide air conditioning applications into comfort and process. Comfort applications aim to provide an indoor environment that remains relatively constant in a range preferred by humans despite changes in external weather conditions or in internal heat loads. The highest performance for tasks performed by people seated in an office is expected to occur at 72°F (22.2 °C) Performance is expected to degrade about 1% for every 2 °F change in room temperature. The highest performance for tasks performed while standing is expected to occur at slightly lower temperatures. The highest performance for tasks performed by larger people is expected to occur at slightly lower temperatures. The highest performance for tasks performed by smaller people is expected to occur at slightly higher temperatures. Although generally accepted, some dispute that thermal comfort enhances worker productivity, as is described in the Hawthorne effect. Comfort air conditioning...
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Portable air conditioners
2007-09-23 23:04:00
A portable air conditioner or portable A/C is an air conditioner on wheels that can be easily transported inside a home or office. They are currently available with capacities of about 6,000 to 60,000 BTU/h (1800 to 18 000 watts output) and with and without electric resistance heaters. Portable air conditioners come in two forms, split and hose: Air-cooled portable air conditioners are compressor-based refrigerant systems that use air to exchange heat, similar to a car or typical household air conditioner. These systems remove heat and water from indoor air, add heat to outside air, and discharge water to outside air, a tank, or a drain. Split systems have separate indoor and outdoor units connected by flexible pipes, similar to permanently-installed units. (Split systems may be portable or permanently installed.) Dual-hose portable systems discharge heat by drawing air from outside through one duct (hose), heating it, and returning it outside through another duct. Single-hose porta...
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History of air conditioners
2007-09-23 23:04:00
While moving heat via machinery to provide air conditioning is a relatively modern invention, the cooling of buildings is not. The ancient Egyptians were known to circulate aqueduct water through the walls of certain houses to cool them. As this sort of water usage was expensive, generally only the wealthy could afford such a luxury. Medieval Persia had buildings that used cisterns and wind towers to cool buildings during the hot season: cisterns (large open pools in a central courtyards, not underground tanks) collected rain water; wind towers had windows that could catch wind and internal vanes to direct the airflow down into the building, usually over the cistern and out through a downwind cooling tower. Cistern water evaporated, cooling the air in the building. In 1820, British scientist and inventor Michael Faraday discovered that compressing and liquefying ammonia could chill air when the liquefied ammonia was allowed to evaporate. In 1842, Florida physician Dr. John Gorrie us...
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Mini-split air conditioners
2007-09-23 23:03:00
Ductless mini-split air conditioners combine some traits of central air conditioning systems with some traits of window or through-the-wall units. They were invented as an alternative to window air conditioners for buildings where the cool-air distribution ducts of a central air conditioning system could not be installed or would be prohibitively expensive to install. An outside unit including the compressor is mounted on an exterior wall of the building, and an inside unit including the evaporator is mounted high on an interior wall, or on or in the ceiling, of the room to be cooled. They are connected refrigerant tubing, condensate drain, and control wires through a hole drilled in the room's exterior wall. An outdoor unit can be connected to one, two or multiple indoor units depending on design. Like window air conditioners, a ductless mini-split system requires no air ducts throughout the building and allows separate "zones" in the building to have independent temperature contr...
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Central Air Conditioners
2007-09-23 23:02:00
Central air conditioners circulate cool air through a system of supply and return ducts. Supply ducts and registers (i.e., openings in the walls, floors, or ceilings covered by grills) carry cooled air from the air conditioner to the home. This cooled air becomes warmer as it circulates through the home; then it flows back to the central air conditioner through return ducts and registers. Air conditioners help to dehumidify the incoming air, but in extremely humid climates or in cases where the air conditioner is oversized, it may not achieve a low humidity. Running a dehumidifier in your air conditioned home will increase your energy use, both for the dehumidifier itself and because the air conditioner will require more energy to cool your house. A preferable alternative is a dehumidifying heat pipe, which can be added as a retrofit to most existing systems. Types of Central Air Conditioner s A central air conditioner is either a split-system unit or a packaged unit. In a split-s...
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Home air conditioning systems
2007-09-23 23:01:00
Residential air conditioning is ubiquitous in Japan, South Korea, Taiwan, Singapore and Hong Kong, especially in the latter two due to most of the population living in small high-rise flats in warm climates. In this area, with soaring summer temperatures and a high standard of living, air conditioning is considered a necessity and not a luxury. Air conditioners are usually window or split types, the latter being more modern and expensive. It is also increasing in popularity with the change of lifestyle in other tropical Asian nations such as India, Indonesia, Malaysia, and the Philippines. In North America, home air conditioning is more prevalent in the South, Midwest, East Coast, the Great Lakes States and South-Eastern Canada, (Southern Ontario, and Southern Quebec), in most parts of which it has reached the ubiquity it enjoys in East Asia. Central air systems are most common in the United States, and are virtually standard in all new dwellings in most states. Older houses and bui...
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Car air conditioning system
2007-09-23 22:58:00
Since the advent of the automotive air conditioning system in the 1940's, many things have undergone extensive change. Improvements, such as computerized automatic temperature control (which allow you to set the desired temperature and have the system adjust automatically) and improvements to overall durability, have added complexity to today's modern air conditioning system. Unfortunately, the days of "do-it-yourself" repair to these systems, is almost a thing of the past. To add to the complications, we now have tough environmental regulations that govern the very simplest of tasks, such as recharging the system with refrigerant R12 commonly referred to as Freon® (Freon is the trade name for the refrigerant R-12, that was manufactured by DuPont). Extensive scientific studies have proven the damaging effects of this refrigerant to our ozone layer, and its manufacture has been banned by the U.S. and many other countries that have joined together to sign the Montreal Protocol, a ...
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Refrigerants
2007-09-23 22:57:00
"Freon" is a trade name for a family of haloalkane refrigerants manufactured by DuPont and other companies. These refrigerants were commonly used due to their superior stability and safety properties: they were not flammable nor obviously toxic. as were the fluids they replaced. Unfortunately, evidence has accumulated that these chlorine-bearing refrigerants reach the upper atmosphere when they escape. The chemistry is poorly understood, but the general consensus seems to be that CFCs break up in the stratosphere due to UV-radiation, releasing their chlorine atoms. These chlorine atoms act as catalysts in the breakdown of ozone, which does severe damage to the ozone layer that shields the Earth's surface from the Sun's strong UV radiation. The chlorine will remain active as a catalyst until and unless it binds with another particle, forming a stable molecule. CFC refrigerants in common but receding usage include R-11 and R-12. Newer and more environmentally-safe refrigerants inclu...
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Compression refrigeration cycle
2007-09-23 22:57:00
In the vapor-compression refrigeration cycle, heat is transferred from a lower temperature source to a higher temperature heat sink. Heat naturally flows in the opposite direction, and due to the second law of thermodynamics work is required to move heat from cold to hot. A food refrigerator or freezer works in much the same way; it moves heat out of the interior into the room in which it stands. This most common refrigeration cycle uses an electric motor to drive a compressor. In an automobile the compressor is usually driven by a belt connected to a pulley on the engine's crankshaft, with both using electric motors for air circulation. Since evaporation occurs when heat is absorbed, and condensation occurs when heat is released, air conditioners are designed to use a compressor to cause pressure changes between two compartments, and actively pump a refrigerant around. A refrigerant is pumped into the low pressure compartment (the evaporator coil), where, despite the low temperatu...
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Air filters
2007-09-23 22:56:00
There are four main types of mechanical air filter media: paper, foam, synthetics, and cotton. Air filters are found in most all forced-air heating, ventilation, and air conditioning systems. The efficacy of the air filters in such systems significantly affects the Indoor Air Quality. The United States Department of Energy advises that "[Air] Filtration should have a Minimum Efficiency Reporting Value (MERV) of 13 as determined by ASHRAE 5.2.2-1999." There are a variety of different types of HVAC filters available. Many are inexpensive and not very efficient. Some options are panel, pleated, electrostatic, HEPA, electronic and media. ASHRAE recommends (MERV 6 or higher) air filters to lower the amounts of pollen, mold and dust that reaches the wet evaporator coils in air conditioning systems. Wet coils contaminated with high levels of pollen and dust can allow mold colonies to grow. Polyester and/or glass fibres are commonly used to make web formations used for air filtration. Both ...
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Humidity control
2007-09-23 22:52:00
Refrigeration air conditioning equipment usually reduces the humidity of the air processed by the system. The relatively cold (below the dewpoint) evaporator coil condenses water vapor from the processed air, (much like an ice cold drink will condense water on the outside of a glass), sending the water to a drain and removing water vapor from the cooled space and lowering the relative humidity. Since humans perspire to provide natural cooling by the evaporation of perspiration from the skin, drier air (up to a point) improves the comfort provided. The comfort air conditioner is designed to create a 40% to 60% relative humidity in the occupied space. In food retailing establishments large open chiller cabinets act as highly effective air dehumidifying units. Some air conditioning units dry the air without cooling it, and are better classified as dehumidifiers. They work like a normal air conditioner, except that a heat exchanger is placed between the intake and exhaust. In combinatio...
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Energy use
2007-09-23 22:52:00
It should be noted that in a thermodynamically closed system, any energy input into the system that is being maintained at a set temperature (which is a standard mode of operation for modern air conditioners) requires that the energy removal rate from the air conditioner increase . This increase has the effect that for each unit of energy input into the system (say to power a lightbulb in the closed system) requires the air conditioner to remove that energy. In order to do that the air conditioner must increase its consumption by the inverse of its efficiency times the input unit of energy. As an example presume that inside the closed system a 100 watt light bulb is activated, and the air conditioner has an efficiency of 200%. The air conditioner's energy consumption will increase by 50 watts to compensate for this, thus making the 100 W light bulb utilise a total of 150 W of energy. Note that it is typical for air conditioners to operate at "efficiencies" of significantly greater ...
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ASHRAE
2007-09-23 22:50:00
American Society of Heating, Refrigerating, and Air-Conditioning Engineers ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) is an organization devoted to the advancement of indoor-environment-control technology in the heating, ventilation, and air conditioning (HVAC) industry. ASHRAE was founded in 1894 to serve as a source of technical standards and guidelines. Since that time, it has grown into an international society that offers educational information, courses, seminars, career guidance, and publications. The organization also promotes a code of ethics for HVAC professionals and provides for liaison with the general public.