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    Knowledge of air conditioner and air duct system

    Knowledge of air conditioner and air duct system First, the air-conditioning heat exchanger is divided into evaporator and condenser 　　 Copper tube type: smooth tube, internally threaded tube, trapezoidal internally threaded tube Fin type: hydrophilic, ordinary (off-white, blue, gold) aluminum foil thickness is generally 0.115 and 0.110, 0.105mm, 0.100mm, also divided into hydrophilic aluminum foil and non-hydrophilic aluminum foil (common aluminum foil), the sheet type Flat sheet, punched sheet, corrugated sheet, etc. 　　 1. Evaporator 　　 Split machine evaporator is generally 2 rows, divided into 2 fold, 3 fold and 4 fold. The evaporator of the cabinet machine and the window machine is similar, there is no folding, there are generally 2 or 3 rows, the structure is relatively simple, but the flow path is more complicated; 　　 The evaporator is mostly hydrophilic slit aluminum foil, which is conducive to drainage and heat exchange and prevents alumina (white powder) from blowing out. 　　 2. Condenser 　　Condensers are divided into two types: air-cooled and water-cooled. Air-cooled condensers are used in household air conditioners; 　　The condenser in the picture is an air-cooled cascade condenser with long U-tubes and aluminum foil in series; 　　 3. Common faults of the two devices 　　 1) Leakage: Including welding port leakage and internal leakage 　　 2) Blockage: local throttling and noise 　　 3) Odor: new machine odor and old machine odor 　　 Second, fan, air duct 　　 1. Basic functions 　　Strengthen the function of condenser and evaporator. Force the air to flow through the heat exchanger to accelerate the heat exchange. 1) Cross-flow wind wheel: a radial inlet, a certain wind pressure is formed by rotating and discharged through the radial direction; the blade area is small and the number is large; the air output is uniform and the noise is low; usually used in the sub Wall-mounted indoor unit; 2) Centrifugal wind wheel: an axial air inlet, which forms a certain wind pressure by rotation and is discharged through the radial direction; the blade area is small and the number is large; the air output is uniform and the noise is low; usually used in the cabinet Indoor unit 3) Axial-flow blade: an axial air inlet, a certain wind pressure formed by rotation and discharged through the axial direction; the blade area is large and the number is small, and the noise is relatively large; usually used in split hanging Wall, floor to outdoor unit. 　　 2. Fault judgment of wind turbine blades 　　 1) Appearance: through direct observation or gently turning the blades of the wind wheel to check whether the blade is broken, whitish, loose assembly, etc. can be directly determined to replace or repair; 2) In terms of wind noise and air volume when the air conditioner is turned on: when the air conditioner is turned on, the wind sound is unusually harsh, the wind turbine blades shake, the whole machine vibrates, there is no wind or the air volume is too small, etc. may be caused by the quality problems of the wind turbine blades , Consider replacing or repairing. 　　 3. Throttling mechanism (capillary tube, expansion valve) 　　 Throttle device has capillary tube, electronic expansion valve, thermal expansion valve; 　　 1. Most of the conventional machines use capillaries, and some of the inverters use electronic expansion valves; 　　 2. The capillary tube controls the flow rate of refrigerant with inner diameter and length shape, thus providing pressure difference; 　　 3. The capillary is as follows: ∮2.5×1.5×1000mm; 　　 4. The capillary tube also has the functions of shunt, bypass, oil return, pressure transmission, etc.;

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    Knowledge of air conditioner and air duct system

    06/14/2020

    Knowledge of air conditioner and air duct system

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    06/14/2020

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    06/14/2020

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    Danfoss and Abena donate more than one million yuan of protective materials to support Chinese fight against New Coronary Pneumonia

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    Before replacing the compressor, remember to do 10 things first, remember ~~

    06/14/2020

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