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Repair and maintenance of vehicle air conditioning
Contents
I. Compressors: automobile air conditioning absorbs instantaneous expansion from r134a compression...
1. Incomplete air-conditioning systems with particulate impurities inhaled by compressors
3. Compressor operating at excessive temperatures, lack of oil or long operating hours, with severe wear and tear
2. If a car air conditioning system
Three, check the straps. Car belts are 376n+50n.
Ii. Condensers and evaporaters: they are metal thins in convected pipes
1. Condensers and evaporaters are required to clean up exterior stains frequently
The condenser leaks are generally visible from the outside
3. Leakages in condensers and evaporation units generally pass through air-container tests (filling tests)
Iii. Erosion valves and cavities
Iv. Liquid dryers
1. Hand-held liquids have two head to take over the temperature, which must be replaced with a greater temperature difference
2. The system must be replaced in case of congestion or must be replaced due to a longer breakdown period
V. Air-conditioning connections
Integrated maintenance of air conditioning:
1. Selection of refrigerants of better quality, appropriate quantity of refrigerants added
The air conditioner will be open regularly
Three, 22 degrees c is the best
Four, "blow" can't fly air conditioning immediately
Turn off the air conditioner before you turn it off
1. Status and outlook of automobile air conditioning compressor maintenance operations 20.
2. Automobile air conditioning structures and repairs: the mechanical industry social
3. Automobile air conditioning applications and repairs, summer cloud publishing house: mechanical industry publication social
Text
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Summary: whether or not the car air conditioning system is functioning is related to the comfort of the owner, the economy, the economy and the economy of the car
Safety. This paper analyses the reasons for the breakdown in the structure of the car air conditioner and proposes the vehicle air conditioner guarantee
Methods of maintenance, reduction of failure rates, extension of the useful life of air conditioners
Keywords: keywords: automobile ac compressor evaporating valves dry device
In the hot summer, air conditioning became a necessity for cars
The widespread use of new technologies has made air conditioning more necessary to the care and maintenance of the owner to make it normal
Work, provide a comfortable environment。
Automobile air-conditioning systems include two major components of cycle systems and electrical control
Less likely problems and simple maintenance, not addressed here
By compressor, condenser, evaporater, expansion valve, liquid dryer, pipe, condenser
Fans, gliders, etc.... Here are selected components with more malfunctions to highlight。
I. Compressors: car air conditioners use r134a to compress the instantaneous expansion of suction
Refrigeration based on the collection of large amounts of thermal energy. Pass
The process, the purpose of the refrigerant dissipation. Heart
It's dirty, it's a power source for the functioning of the intra-routine medium。
The most vulnerable part of the compressor is the axle seals (also oil seals)
The temperature is high, the axle seal is leaky
The axle seal is bound to leak when the oil tracks。
The main causes of the compressor damage were:
1. Incomplete air-conditioning systems with particulate impurities inhaled by compressors; 2
(b) excess of refrigerant or lubricant, resulting in “liquidation” of compressor damage
3. Compressor operating at excessive temperatures, lack of oil or excessive operating time, with severe wear and tear
The machine's electromagnetic ionifiers slide and the temperature is too high; 5; the compressor's power is too small and pressured
(b) the manufacturing quality of the condensed machines is deficient
Maintenance of compressors: 1. Operating compressors every two weeks after the decommissioning of air conditioners
Minutes。
2. If a refrigerated oil spill is detected in the car air conditioner system, it should be repaired in a timely manner and as required
Van garrett's car-specific refrigerated oil
There's no leak in the area。
Three, check the belt. Car belt is 376n+50n
38kg+5kg)
In use, the driver can flip the belt by hand, if the belt turns 90 degrees
The tension is almost normal。
Other organiser
Ii. Condensers and evaporaters: they are metal thinners in convected pipes, using the outside world
A device for thermal exchange of air and materials within the pipe
It's liquid. Evaporaters, unlike condensers, are refrigerants that absorb heat from liquid to gas
Places. The most common malfunctions are dirty jams and leaks
The compressed air blows over and over again until it's clean and smooth。
Maintenance of condensers and evapotors:
1. Condensers and evaporaters must always clean up the exterior and be careful that the heat wings do not fall or
Damage, ensure heat transfer。
2. Leaks from the condensers are generally visible on the outside, such as scratches and breakage, and seepage from the leak site
Oil trails, etc. The leak of the evaporationer is hidden in the evaporation box because of low pressure and the external surface is exposed
It's not easy to find。
3. Leakages in condensers and evaporation units generally pass through air-container tests (filling tests)
At that time, the evaporation unit's surface was very low and was exposed in large quantities without frost or ice。
Iii. Erosion valves and cavities
The swelling valves and perforation tubes are current-saving devices for the rac system, and the cooling effect on air conditioning
The fruit has a direct and critical function
Automatically regulate the flow and pressure into the evaporation unit to match the evaporation temperature。
Maintenance of expansion valves or perforated tubes: drying agents (silicate) in liquid dryers when the system is dirty
Cracks, which are easily formed at narrow passages with high-pressant flow of coolant into expansion valves or cavities
Blockage, resulting in an abnormal supply, and the system is not functioning properly
Repeated rinse and dry with nitrogen or dry compressed air before refilling。
Iv. Liquid dryers
The liquid dryer is a storage refrigerant and a absorber of moisture and impurities. It's both leaked
Refrigerant supplements; filters the impurities mixed in the refrigerant
Silicon glue, absorbs moisture. Under normal conditions, the glass lenses of the liquid dryer are clear, as follows:
Foams in the form of insufficient refrigerants; no movement in the form of no refrigerants or excess refrigerants; small quantities of bubbles
The flow of beads is the right kind of cooling dose. For paste liquids, indicate that the system is dirty or stored
Too much oil。
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It's common for liquid dryers to accumulate too much dirty material and plug and pressure switches to fail.
The liquid dry filter shall be replaced if:
1. Hand-held liquids have two head to take over the temperature, which must be replaced with a greater temperature difference
2. The system must be replaced in case of congestion or must be replaced due to a longer breakdown period。
V. Air-conditioning connections
Change of metal card to hand-held pipe if the air conditioner connection is broken or the interior is dirty
Rotate left and right, and you'll be able to move. Soft
The more loose, the larger... The rubber seals and the gas cores of the links should be intact
The pipes should be clean and clean。
Integrated maintenance of air conditioning:
1. Select the quantity of refrigerants of better quality to be added。
Air conditioners are to be activated on a regular basis so that air conditioners compressors and sealing systems are maintained. Status
And, in general, it's 10 minutes to recycle the refrigerant and prevent oak
The ageing of the glue hoses... Preferably weekly or semi-monthly。
Three, 22 degrees c is the most appropriate
At about 25 degrees celsius if there's an old man or a child in the car
More appropriate。
4. "sunshine" vehicles cannot operate air conditioning immediately
Open all the windows and doors, get the heat out of the car and turn on the air conditioning until it's cold
When the air comes out, close the window and open the inner circle。
Turn off the air conditioner before it shuts down
Wet, causing fungus to breed in air conditioners, causing air conditioners to smell
The air conditioner will be off in a minute。
Car-friendly air conditioning is about caring for one's health, starting with the correct use of air conditioning
The second is to do routine maintenance, which will help to extend the life of the air conditioners and bring you more
The joy of driving so much makes you feel high-tech charm。
