seabet io

        It is not to use the instrument and instrument，Only eyes (see)、Ear (Listening)、Nose (Wen)、Hand (Dial、Twisted and touching) and the necessary tools to apply an appearance inspection of the air -conditioning system，Find the cause of damage or failure。This method of inspection is very simple，It is very effective for the failure of the air -conditioning of the vehicle's air conditioner。

(1) See
First observe various switches on the air conditioner、button、knob、Whether the fuse is in the correct position or is there or not to loosen (refers to the fuse, etc.)。

① Watch whether the surface of the condenser is clean

The surface of the condenser is attached with soil or debris，It will affect the refrigeration effect。If you are too dirty，Should clean it with water in time。When cleaning the condenser，Be careful，Do not touch its wings and deformation。Otherwise, seabet ioit will affect the cold effect，Then the seabet iotemperature of the refrigerant flowing through the expansion valve rises and makes the refrigeration system's refrigeration effect worse。

A intuitive check of the capacity of the capacity of the expansion valve。In normal times, the capillary tube should be firmly clamped and tied to the exit of the evaporator with insulating cloth or paste the special bag，Some capillary pipes accurately insert in the jack of the refrigeration pipeline，and cover it with temperature oil。If there is an abnormality if it is found，It should be restored to its original state in time。

② Whether there is oil stains in the connection parts

Inspect all the connections of the air conditioning refrigeration system，See if there are oil stains。Anyone who has oil and oil，

All shows that there is a leakage of refrigerant here。To confirm the diagnosis，can be further used by electronic leakage or other leaks to confirm。

When confirmed that the refrigerant is leaked，You can tighten the nut at this connection，or redo the pipeline horn mouth and install a sealing ring，To prevent chronic leakage from leaking, the refrigeration dose in the system gradually decreases。

From a large number of maintenance examples，In addition to the pipeline connection, it is prone to leakage，Compressor shaft seal、Sealing pads of the front and rear cover、The probability of leakage from the maintenance valve and other parts is higher，Therefore, these parts are also the focus of intuitive inspection。

③ Watch the condition of each hose

A large amount of rubber pipes use the automobile air conditioner system，Not only is it easy to arrange the installation of air -conditioning pipelines，and it can be suitable

When reducing the vibration of the air -conditioning pipeline。But due to driving bumps，High -pressure pipeline high pressure、High temperature，Low temperature and other factors such as low pressure pipe roads，Caused an aging pipe、Bubble、Crack、wear leakage and other phenomena。

So，Once the rubber tube is found to be damaged, replace it in time，When the rubber tube bumps with the engine，It is also necessary to separate it in time，and use certain measures to fix it。When the rubber tube is through the metal plate,，Be sure to install a protective cover，and fix the protective cover，To prevent metal cutting tube。

④ Watch the condition of the inside refrigerant in the vision mirror

Observe the humidity of the refrigerant can be checked by the visual liquid lens:

Blue -normal state.

Red -The humidity is saturated。If it is red，The refrigerant in the system should be slowly exhausted，Replace the dry tank，Then add the refrigerant。

Observe the flow of the inside refrigerant of the vision lens as shown in Figure 8-1，You can confirm whether the amount of refrigerant in the refrigeration system is sufficient，To confirm whether the system is leaked。

Preparation: Wipe clean the vision lens，Start the engine，and stabilize its speed at about 1500r/min，A/C switch after 1min，The wind turbine is placed at the highest wind speed gear，The air conditioner is set at the maximum cooling position，Make the air -conditioning system work about 5 minutes to restore the idle operation of the car。

The condition seabet loginof the refrigerant in the visual liquid lens usually has the following seabet apptypes，The specific analysis is as follows:

(A) Clear and transparent bubble，I can’t see the flow of liquid。

This phenomenon may have seabet iothe following reasons.

l Excessive refrigeration dose

At this time, touch the compressor with both hands、exhaust pipe port，It is found that the temperature difference between the two is very obvious，and the high -voltage side is hot，There is frost on the low pressure side，The temperature of the air outlet will be about 3 ℃ ～ 5 ℃。Place the air conditioner at the maximum wind speed、Maximum refrigeration and suddenly increase the throttle or increase the cooling effect of the condenser (use wind cooling、Water cooling) or stop air -conditioning operation，After waiting about 45s，Observing the inside of the visual fluid lens is still clearly passing the airless bubble flow，Explain that there are too many refrigeration doses in the system (such as the pressure of the system with pressure to measure the pressure of the system will exceed the normal value)。For this，Should let the extra refrigeration dose in time，To avoid the rupture of the pipe，Refrusting performance is reduced，Rise of energy consumption。

l A moderate amount of refrigerant

Compare at this time when there are too many refrigeration doses of the system，High -voltage side is not hot，The temperature of the outlet is low。If the air conditioner is placed at the maximum wind speed、Maximum refrigeration and suddenly increase the throttle or increase the cooling effect of the condenser (use wind cooling、Water cooling) or stop air -conditioning operation，After waiting about 45s，Observing the liquid lens is clear and there are a little bubbles to produce，When the pressure of the system is used to measure the pressure，The pressure values ​​are within the normal range。

l Refrigerator full leak

When the refrigerant in the system is leaked，If you touch the entry of the compressor with your hand、When the exhaust pipeline，I will find that there is no temperature difference，Air conditioning outlet is not cold。The engine should be turned off immediately for this，to avoid burning the compressor。All leaks of the refrigerant，Should find the cause and exclude the fault。

(B) Occasionally bubbles

Occasionally or slow bubbles flowing in the visual mirror is: the refrigeration dose in the system is slightly insufficient or the desiccant of the refrigeration system is saturated，It may also be mixed with water in the refrigeration system。It can be further distinguished by observing whether the expansion valve is frosting.。

l If the expansion valve is not frosty

This phenomenon shows insufficient refrigeration dose。If the inspection system has a leakage,

Reason;。

l If the expansion valve is frosting

At this time，Sometimes the colorful desiccant can be seen in the vision mirror，

Explanation is that the refrigerant in the refrigeration system contains moisture，Dry bottle should be replaced immediately，After confirming that there is no problem，can be put into use。

(C) There are a large number of bubbles or foam

This situation indicates that the refrigeration dose in the system is seriously insufficient，and a large amount of air and moisture infiltrated in the system。For this，Copy refrigeration system for leakage treatment，Reinstall the vacuum after confirming that there is no error，Inject lubricating oil and sufficient refrigerant according to regulations。

(d) striped oil stains or black oil foam

The reason for this phenomenon is seabet iothe following reasons.

l Excessive frozen lubricant

At this time，seabet myIf the compressor is checked、There are obvious temperature differences in the exhaust pipeline，And will

The compressor stops running、The rest of the air conditioner is running，Clean oil stains in the liquid mirror，It means that the system's refrigeration dose is slightly less、But too much frozen lubricant。For this，Some frozen lubricants should be released from the system，Add an appropriate amount of refrigerant。

l Frozen lubricant deterioration

The typical feature of this reason is，Compressor in、There are obvious

temperature difference，When the compressor stops run、The rest of the air conditioner is running，The oil stain left on the visual liquid mirror glass is black or there are other debris，Explain that the frozen lubricating oil in the system deteriorates or contaminated。For this kind of failure，After a thorough cleaning of the refrigeration system，Re -changing new frozen lubricant and refrigerant。

indicate:

White turbid: The compressor lubricating oil and refrigerant are faint milky white。

There are bubbles and white turbid: The refrigerant of the gas and the separated compressed engine oil are mixed together, which is a faint milky white and contains bubbles。

The above project is from the observation window visionStandard。Due to the influence of external gas conditions, it is also difficult to judge by the observation window.，So please confirm the pressure changes of the high -voltage side at the same time (if you fill it out，Will rise sharply)。

⑤ Watch the frost of low -voltage circuits

Check the low -voltage loop frost of the refrigeration system，The surface frost is normal，Otherwise, it is abnormal。

⑥ Watch the condition of the electromagnetic coil

Check whether the electromagnetic coil of the compressor can combine the compressor rotation shaft and rotate，No abnormal sound is normal。

⑦ Watch the evaporator's water seepage

Observing the evaporator's water seepage is performed at about 8 minutes of the air conditioner，There is a water from the evaporator to pick up the water disk

is normal.

(2) Ear hearing

Listening to the running air conditioner in the ear is abnormal sound。When the compressor is running normally，It will come out with light and crispy and uniform valve sheet jumping sound。If there is noise，It may be the aging of electromagnetic coils，Insufficient suction，Noise caused by slipping after power -powered，It may also be a clutch chip wear caused by too much ambassador clutch to slide，You can use the gap between the clutch to prevent slipping。

When I heard that there are more severe accidents in the body，This situation can be determined that this situation is mostly caused by insufficient lubricating oil or broken oil in the compressed machine。

Is there any liquid sound of the compressor。If there is a liquid shot or a phenomenon of the cylinder，It may be too much refrigerant or too much expansion valve，Should release refrigerant or adjust the expansion valve。In addition，It may be damaged inside the compressor。

Air conditioning and belt、Fan、Flames and other abnormal sounds，Careful check and deal with it in maintenance。

(3) Hand touch (dial, twist, pull)

High pressure seabet iopipe roads are hotter，If there is a significant temperature difference or an inlet and export Seabetof imports somewhere，Explain that there is a blockage here。Feel the intake pipe and exhaust pipe of the compressor with your hands，There should be obvious temperature difference，The former is cool，The latter is hot。Feel the temperature of the condenser into the pipe and discharge pipe with your hands，The temperature at the entrance of the condenser is about 70 ° C，The temperature of the export tube is about 50 ° C。The temperature of the upper part of the condenser is higher than the lower temperature。

Because the low pressure pipeline is cooler，High pressure seabet iopipe roads are hotter，Therefore, if the high pressure tube road is checked、There is no significant temperature difference in the low pressure pipeline，Explain that the refrigeration system does not work or system leaks，Refrigerator serious insufficiency。

Light -dial, lightly pull all kinds of electrical lines, driveBeltDisk, determine whether its contact is firm and good.

The connection of the hand -twisted air -conditioning refrigeration hose should be firm.

The cause of the air -conditioning refrigeration system failure by touching the air conditioning refrigeration system is valid and simple，As long as you continue to accumulate the practical experience of the feel，You can quickly find the faulty area or component (part)。

 How do you think of this, let's leave a message below everyone to comment together

Click to read??"Secret" of the voltage of the battery battery for you!

Some materials are from the Internet, if there are infringement and deletion