In recent years, our fellow citizens neizbalovannym faced with such an abundance of modern household appliances and building materials, that many a head went round. But if a microwave oven, Vidic and other hot tub with whirlpool, we still somehow figured out that air conditioning is still causing a lot of questions. However, it is not surprising: in recent years has been written about him so much tales that fit and get confused. Therefore, it is time to clarify this issue. So what is the air conditioner, how it works, and what problems can solve? Where did this miracle? The date of the invention is considered to be the air conditioner in 1902, when an American engineer Willis Carrier created an unprecedented first device to one of New York publishing houses. By design, it really was air conditioning, but his primary goal was not to create a pleasant coolness to employees, and the fight against humidity, which is good compromise print quality. However, as the transformation of the wild capitalism that we are unsuccessfully trying to build today, even air conditioning - and he turned his face to the man. The first tentative steps in this direction have been made only in the mid-twenties, when the air conditioning system has appeared in a department store in Detroit. However, in those years, the air conditioning was a rarity, cost is expensive, and usually designed specifically for the particular building. Direct descendants of these units are the modern central air conditioning system, are still used as a coolant water or brine water.
Saturday, October 29, 2011
Friday, October 28, 2011
Air Conditioners: Myths and Realities
In recent years, our fellow citizens neizbalovannym faced with such an abundance of modern household appliances and building materials, that many a head went round. But if a microwave oven, Vidic and other hot tub with whirlpool, we still somehow figured out that air conditioning is still causing a lot of questions. However, it is not surprising: in recent years has been written about him so much tales that fit and get confused. Therefore, it is time to clarify this issue. So what is the air conditioner, how it works, and what problems can solve? Where did this miracle? The date of the invention is considered to be the air conditioner in 1902, when an American engineer Willis Carrier created an unprecedented first device to one of New York publishing houses. By design, it really was air conditioning, but his primary goal was not to create a pleasant coolness to employees, and the fight against humidity, which is good compromise print quality. However, as the transformation of the wild capitalism that we are unsuccessfully trying to build today, even air conditioning - and he turned his face to the man. The first tentative steps in this direction have been made only in the mid-twenties, when the air conditioning system has appeared in a department store in Detroit. However, in those years, the air conditioning was a rarity, cost is expensive, and usually designed specifically for the particular building. Direct descendants of these units are the modern central air conditioning system, are still used as a coolant water or brine water.
Types of air conditioners. Differences between the types
Types of air conditioners Ranked Among the domestic air conditioners are two basic types: monoblock air conditioner (window or mobile) and an air conditioner split type system. Window air conditioners - in the recent past, the most common type of air conditioners in our country (series LC). Now almost all foreign companies producing air conditioners offer window models from 1.5 to 5 kW. The simplest of these can only cool air is more expensive - have a heating mode and a remote control. The main disadvantage of window air conditioner is increased (compared with split-system) noise and the need for installation in the window opening. Advantage - low price. Portable air-conditioners - a kind of one-piece air-conditioners. Superficially looks like a small cupboard on wheels. Such conditioners do not require special installation, you only need to take a flexible hose (duct) with a diameter of 15 centimeters and a length of 1-2 meters on the street through the window or hole in the wall. Through this tube is removed the hot air. Lack of mobile air-conditioner - increased noise and high price, comparable to the value of a good split-system. Split-system. This air conditioner consists of indoor and outdoor units, which are connected with electric wire and copper tubes with refrigerant. With this design the most noisy and cumbersome part of the air conditioner compressor is moved outward. Indoor unit can be placed in almost any place home or office. All modern split systems are equipped with remote control (RC) with LCD display.
Foam insulation ducts
The main purpose of technical air conditioning systems is to achieve a comfortable temperature for humans. You must fulfill the following conditions: the air must be cleaned, repaired odors and toxic substances, air must be heated or cooled, humidity should be raised or lowered. Inside the building there should be no loss of energy in the air distribution system. In addition to reducing energy losses, it is important that at a temperature below the dew point at facilities not formed condensate. For more comfort the people inside the building other sounds that occur within the system must also be suppressed or absorbed. Why preference should be insulated with closed cell foam? When to reduce heat exchange with the cold air ducts with a temperature below ambient temperature, thermal insulation is applied, it is on both sides exposed to constant pressure of water vapor. Partial pressure difference from one edge of the insulating material can be calculated using standard physical formula, and then the obtained data can be correlated with the amount of water vapor within the insulation material. Since water vapor tends to penetrate into the material, it reaches a level where the surface temperature is below the dew point and condensation will begin with all the consequences. Best resistance to water vapor have a closed-cell structure, since each cell of these materials is an effective insulation system. The higher the quality of the material, the greater the insulating effect and, accordingly, more equipment life, lower costs for preventive maintenance, and generally fewer problems at the consumer.
Thursday, October 27, 2011
Air purifier - air purifier
Air Purifier - a device that is designed to remove the air of dust particles, lint, microorganisms, smoke, etc. The new models are equipped with additional function of humidification. The scientists found that the content of harmful substances in indoor air often exceed outdoor air pollution is 4-6 times dirtier and 8-10 times more toxic than outdoor. During the day, we breathe in up to 15-16 kg of air - etonamnogo more than the amount eaten of water. And even on the assumption that the impurities in the air do not exceed the MCL, per night, each person consumes 15 to 100 mg of harmful substances. Air from the destination and speed of treatment are classified as: - domestic - commercial - Semi - industrial. Air consists of two main components: the fan and filter set collected in a single package. Often use several types of filters for air purifiers, in connection with which attained the highest degree of purification. Filters for air purifiers 1. Pre-filters - mechanical filters. This is the most common types of filters, delay the dust particles, mikroorganizmovbolshih size by mechanical means. The problem of mechanical filter - protection of subsequent filter elements air cleaner from premature wear. Such a filter in the design of the air cleaner to clean by washing with water, prosushivaetsyai set back in the air cleaner. 2. Photocatalytic filter - the new filter dlyabytovogo air cleaner. The operating principle of an air purifier with photocatalytic filter is decomposition and oxidation of odors, toxic contaminants and organic compounds to the neutral components of clean air at the surface of the photocatalyst under UV light.
Fresh air
If you breathe in horrible, you can move away to another world much earlier than the allotted time. Air "cocktail" of most major cities in excess contains sulfur dioxide, carbon monoxide, various lead compounds and heavy metals, and just ordinary dust. Danger fraught with many construction materials, of which the following construction of the house - they can become a source of radon and asbestos. In addition, detergents, cleansers and other household chemicals are also not ideal in terms of ecology, as a supplier of ammonia, hydrogen sulfide and other toxic substances. That is why the vast majority of residential and office buildings provided the ventilation system. However, over time, dust, airborne dust and vapors are deposited on the surface of the duct, creating a breeding ground for bacteria and impeding the work of the ventilation system. If air movement is due to a natural draft, the result will be a gradual reduction of inflow and exhaust, even to complete blockage of the ventilation duct. The time saves only the fact that some ducts made in the building performance, have a decent section. The situation is worse in systems with artificial inducement, in other words, equipped with a fan. Air capacity of such systems is much higher, and therefore clogging the system is much faster. In addition, "crystallization point" of dust are different components and assemblies such as fans, heat exchangers, humidifiers, valves, and the lattice. The problem here is overgrown with all sorts of rubbish duct has one very nasty side.
Central air conditioning system
Called central air conditioning system serving a few or one large room. Various types of central air conditioners: the type PACKAGED, sectional, self-contained, multizone central air-conditioning. Consider some of them. PACKAGED type air conditioners air conditioning systems such as PACKAGED from the indoor unit cabinet type (sometimes called columns) are used to treat the air in large rooms (concert and conference rooms, shops, restaurants, manufacturing facilities, computer rooms, waiting rooms, ticket halls). By way of feeding the treated air installation of this type are divided into air-conditioning, feeding processed air pressure in the ducts of the ventilation system and air conditioning, feeding processed air directly into the amount of serviced premises. Multizone central air-conditioning in the early 80-ies a number of leading in the field of air conditioning companies (Daikin. HITACHI. Mitsubishi Electric, Mitsubishi Heavy Industries, Matsushita (Panasonic / National), and others) have developed a new product in a comfortable air-conditioning - the so-called system Variable refrigerant flow (VRF), or multizone system successfully combines the advantages of autonomous local and central air conditioning systems. Treatment of air in the room is served by the indoor unit, similar in technical capabilities and consumer qualities of the indoor unit of household or a semi-split systems. Group of indoor units (various types and capacities) is attached to the outdoor unit system of insulated copper piping.
Wednesday, October 26, 2011
Exhaust system
To your house ventilated, good builders have provided exhaust air grille located in the kitchen, bathroom and latrine. However, over time, such a system cluttered with dust, debris, matted poplar fluff, pigeon feathers and droppings. Situation can be corrected if the air to drive by a fan. In this case, normal ventilation is sufficient, even remaining in the duct lumen. In order to understand how cluttered the ventilation system in your home and what fans want, it is enough to bring a candle outlet in the kitchen, toilet and bathroom. If the flame is deflected in the direction of the lattice, hence, the thrust is and can do simple fan. If the candle does not react to the proximity of air vent need to "centrifugal" fan, which creates a higher pressure. It is worth the pleasure two or three times, but if the duct thoroughly beaten all good things, the standard "axial" fan just does not help. However, the other extreme, too harmful. If you organize a very intense beam, exhaust lattice neighbors on top turn in the supply, and through them you will also receive a spoiled air entraining years kopivshuyusya in the ventilation system dust. Even if the neighbors you do not care, do not forget that they too can make you "podlyanku. For example, plug into the duct vents below its old quilted jacket. In this case, your ventilation system is just a "choke" or start pumping air from the bottom to neighbors (if they have no glass). In every apartment has at least three places where the presence of the fan will not be superfluous.