What is central air conditioning? Central air conditioning working principle
Many people are familiar with central air-conditioning, even if they do not have central air-conditioning, they must have been used, because most commercial houses and public houses basically use central air-conditioning for indoor temperature control, and some middle- and high-end home users will also choose central air-conditioning. But home users mainly choose small central air conditioners, which we often call home central air conditioners. In fact, the working principle of central air conditioning in home is the same as that of central air conditioning, except that central air conditioning is a kind of miniaturization of central air conditioning. There is not much difference in function and use effect. Let's take a look at what is the central air conditioning, the details of the working principle of central air conditioning! Home central air-conditioning air conditioners were first popular in Europe and the United States, and its most prominent feature is the living environment where "beauty and function" coexist. Compared with the traditional split-unit and cabinet air conditioners, home central air-conditioning air conditioners have the development momentum of latecomers. More and more home users have abandoned split air conditioners in the renovation of new homes, using home central air conditioners. Central air conditioning working principle - cold / hot water unit The outdoor unit cools (cools or heats) the cold (hot) medium water, and then the cooled (hot) water after the cooling is sent by the water pump to the fan coil unit installed indoors, and the fan coil unit takes place in place. The method of returning air exchanges heat with indoor air to achieve the purpose of indoor air treatment. The central air conditioner of the fixed frequency cold water machine or the frequency conversion hot and cold water machine is the reduction of the large central air conditioner. The condenser is changed from water cooling to air cooling, and the hot water is sent to the fan coil by the water pump. The introduction of fresh air, manhole, ceiling condensate discharge, noise index and multi-connection are the same, but the hot and cold water pipes are added; due to the large temperature difference, the sealing problem is prominent, and the water leakage has a great damage to the decoration. In addition, large central air-conditioning evaporators are regularly cleaned and pickled. There is no good policy for domestic hot and cold water machines. The efficiency of long-term use of cold heat exchangers will be greatly reduced. If combined with a central water treatment system, the above difficulties can be overcome. Air conditioners are used in separate rooms. In other rooms, the fan coils have hot and cold water pipes flowing through them, which also generates energy consumption. It is more popular to use electromagnetic water valves to close the waterways. In addition to the cost factors, the local water flow rate is too high. The problem of noise. During heating, the outdoor unit absorbs the refrigerant vapor from the condenser and compresses it to deliver vapor refrigerant to each indoor unit. Each indoor unit is placed on the ceiling by means of installation. The air is sucked through the air return port, heat exchange is performed, and the air is sent back to the room by the local air return air from the air supply port. During cooling, the outdoor unit absorbs the refrigerant vapor from the indoor unit and compresses and condenses it to deliver liquid refrigerant to each indoor unit. The unit is controlled by a microcomputer in the energy regulation mode, and the variable frequency compressor of the outdoor unit automatically adjusts the working state of the compressor according to the change of the indoor cold and heat load to meet the requirements of the indoor cold and heat load. Among them, there are 1 or 2 inverter compressors or 1 fixed-frequency compressor, and there is radio frequency interference on the circuit, which has an impact on the computer. The introduction of the new air into the ceiling is the same as that of the condensate and the multi-connection. The design of the branch of the fluorine tube is reasonable. One machine is shared between the upper and lower layers. The pipeline requirements are higher, and it is easier to have the end internal effect when fully opened. Poor situation. Fixed-frequency multi-connection type: The split air conditioner is concentrated into one outdoor unit, and there are three compressors in one to three. The refrigerant system is independent; the wall-mounted indoor unit is changed into a hidden type; the introduction of fresh air is difficult. A variant of the air conditioner, the noise of the fan in the bedroom is increased by 7 to 14 decibels from low to high, up to 50 decibels, and each bedroom needs to be increased by more than 1.2 m in length, 0.6 m in width and 0.3 m in height. Manholes; each internal machine requires a condensate drain line. A fixed-frequency outdoor unit, a fixed-frequency indoor unit, sends hot and cold air to each room through the air duct, which can easily introduce outdoor fresh air; it is easier to concentrate on the air, such as humidification, and is a cheap machine. The design is reasonable. The noise of each room is only increased by 1 to 3 decibels. The bedroom does not need to be suspended. Each room can be controlled above the temperature set by the main thermostat to control the temperature. It can have a certain proportion of energy transfer to achieve energy saving. And speed up the effect of air conditioning heat and cold. During heating, the outdoor unit absorbs the refrigerant vapor from the condenser and then delivers the vapor refrigerant to each indoor unit after being compressed. The indoor unit draws in air through the return air outlet disposed on the ceiling, performs heat exchange, and then is sent into the indoor installation. The air ducts (channels) in the ceiling of each room are transported to the indoor rooms through the diffusers on the air outlets. During cooling, the outdoor refrigeration unit absorbs the refrigerant vapor from the indoor unit and compresses and condenses it to deliver liquid refrigerant to each indoor unit. A new damper and exhaust damper are designed on the air duct (road), and the air can be replaced at a certain ratio to ensure the quality of the indoor air. The working principle of central air conditioning is actually similar to that of traditional air conditioners. It consists of four parts: compressor, condenser, throttle valve and evaporator. As long as we master the functions and principles of these four parts, we can Grasping the structure and operation mode of the entire air-conditioning system, the function and installation of the entire air-conditioning system will be clear to the chest. The above is a detailed answer to the working principle of the central air-conditioning, if you want to know more about the exciting content, Please continue to pay attention to our selection manual section! More related wonderful reading: Water-cooled central air conditioning working principle water-cooled central air-conditioning cleaning What is the principle of central air conditioning? Detailed explanation of the working principle of central air conditioning What is central air conditioning? 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