Does it take time to add refrigerant to a car air conditioner?

First of all, it is necessary to determine whether there is any remaining refrigerant in the system, and if not, it is necessary to vacuum it from the new system and detect leaks. Vacuum must be evacuated at the same time as the high and low pressure interface, if there is still residual refrigerant in the system, it is necessary to eliminate whether there is leakage, the leakage point of the general automobile air conditioner is mostly at the interface and the rubber and aluminum tube pressure joint, with nitrogen pressure and soapy water can be found, the sealing rubber ring of the interface can be solved, pay attention to the type of refrigerant and the corresponding sealing ring when replacing, generally speaking, the automobile refrigeration system can not be completely sealed, under normal circumstances, the refrigerant will generally leak about 3 years, and the refrigerant can be added after the above problems are eliminated. When adding refrigerant, run the engine, turn on the air conditioner, add refrigerant from the low-pressure interface of the system, and check the leak again after adding. If the refrigerant is added after vacuuming, the compressor of some air conditioning systems will not run in the state of no refrigerant, and the compressor will run when the refrigerant is added to a certain Chengdu, which should be paid attention to in maintenance

There is also refrigerant in the system pipeline, but the refrigerant is added, and there is no need to vacuum, as long as it is filled from the low-pressure side pin valve in the running state of the air conditioner.

If the refrigerant in the system pipeline leaks, it is necessary to vacuum the vacuum pump first, and then fill the standard amount of new refrigerant after the negative pressure is qualified.

It is best to check for leaks before filling refrigerant, and fill leaks if there are leaks.

Adding refrigerant is mainly divided into the following four steps: (1) Before adding condensate to the automobile air conditioner, it needs to be vacuumed with a vacuum pump for 30 minutes. Be sure to open the R134A cylinder with the bottle mouth facing downwards in a state of no leakage and absolute vacuum inside, loosen the hose joint in the middle of the pressure gauge, drain the air in this section of the hose, open the manual valve on the high pressure side, and pour liquid refrigerant into the high pressure side.

2) When the pressure of the high-pressure gauge or low-pressure gauge reaches equilibrium and will not continue to rise, close the manual valve on the high-pressure side, let the mouth of the R134A cylinder go up, and stop for more than five minutes. (3) Start the air conditioner, open the manual valve on the low-pressure side, and pour gaseous refrigerant from the low-pressure side, and it is strictly forbidden to pour liquid refrigerant from the low-pressure side. At this time, the engine speed should be maintained at 800-1200rpm.

4) After adding the specified amount of refrigerant, observe whether there are bubbles through the sight glass, if there are no bubbles and no excess refrigerant, then then adjust the engine speed to 2000r min, and the air volume of the blower is turned on to the highest gear. The pressure on the low-pressure side in the system should be, and the pressure on the high-pressure side should be. The refrigerant of air conditioning is actually the working medium of the refrigeration cycle, which uses the phase change of the refrigerant to transfer heat, that is, the refrigerant absorbs heat when it vaporizes in the evaporator, and releases heat when it condenses in the condenser.

At present, there are more than 80 substances that can be used as refrigerants, and the most commonly used are ammonia, freons, water and a few hydrocarbons.

1.A car air conditioner DIY filling supplement tube.

2.A bottle of R134A refrigerant 250 grams is fine.

3.Now let's start to test the pressure on the car: first rotate the thimble in the end of the DIY refill bottle opener counterclockwise to the very top, screw the refrigerant bottle into the bottle opener, and screw it tight.

4.To find the low-voltage interface, there is generally a small blue or black hat on the left end of the hood, and there is an L on the top of the hat, and the small hat is screwed down.

5.Start the car engine and turn on the AC switch of the air conditioner, turn on the blower to the maximum, wait for three minutes, and then connect the DIY pipe call interface to the low-voltage end of the car air conditioner.

After the tube is connected to the low-pressure interface, the DIY pipe pressure gauge will have a scale indication instantly. At this time, the DIY pipe is connected with the air conditioning system, look at the pressure scale on the pressure gauge, you can know the pressure in the system, under what pressure to fill it? At this time, there is a knowledge note!

The pressure in the automobile's blank rubber adjustment system changes according to the change in the temperature of the external environment. In the figure below, the Fahrenheit temperature and the air conditioning system pressure are compared to confirm that the pressure in the system is high and low, and if the system pressure is high, it means that the refrigerant in the system is more than normal, otherwise the refrigerant should be supplemented. If the outside temperature is 30 degrees, the pressure in the air conditioning system should be around 45 psi, and less than 45 psi should be supplemented with refrigerant.

Split machines have external interfaces, which in many cases are supplemented with part of the refrigerant. In the process of refrigerant purification, the basic method of judging the charge is to observe the cooling or condensation of the evaporator fins. Start the air conditioner, observe while filling, and stop filling when the surface of the evaporator is all cold or condensation.

Otherwise, it will be excessive. Of course, when the evaporator is first turned on, the heat transfer temperature difference of the evaporator is large, and the refrigerant vaporization speed is fast, and the circulation volume is larger. When the room temperature drops, the heat transfer temperature difference of the evaporator is smaller, and the refrigerant circulation volume will be smaller.

There is no need to worry about this, there is a vapor-liquid separator on the air conditioning compressor, and a small amount of excess refrigerant will be stored in the vapor-liquid separator after the room temperature is low, which has no impact on the compressor and system work. The filling volume can only be based on the circulating volume when the machine is just turned on and cooled down.

Refrigerant, also known as refrigeration working fluid, is the working medium of the refrigeration cycle, which uses the phase change of the refrigerant to transfer heat to Wookison, which is both endothermic when the refrigerant is vaporized in the evaporator and exothermic when it condenses in the condenser. Do you know the method of adding refrigerant to automobile air conditioner?

1. Install the manifold pressure gauge, connect one end of the green hose to the middle of the pressure gauge, and connect the other end cavity to the vacuum pump, and then carry out vacuum extraction operation.

2. Install the refrigerant tank.

3. Fill the refrigerant from the high edge pressure side: when the engine is not working, open the valve on the high pressure side and add the refrigerant until the low pressure gauge reaches about 098 MPa, after filling, close the valve.

4. Check the air leakage and use the electronic leak detector to detect the air leakage of the system.

5. Fill the refrigerant from the low-pressure side: after closing the valve on the high-pressure side, start the engine and run the air conditioner, open the manifold pressure gauge, and add the specified amount of refrigerant.

6. When replacing the filling tank, close the valves on both sides of the high and low pressure; After replacement, open the air drive valve to release air from the hose (green) in the middle and the manifold pressure gauge.

7. Check the refrigerant filling amount according to the pressure display of the manifold pressure gauge. When the refrigerant dosing volume reaches the specified amount, the pressure of the manifold pressure gauge should also reach the specified value.

CRR intercooled warm reminder: now there are many counterfeiting methods that are difficult to prevent, everyone should not be greedy for small bargains, must buy well-known big brands, in order to avoid potential inferior refrigerants and compressors contact and damage to the compressor.

Hello, loosen the valve core of the fluorine port of the car air conditioner, and you can drain the original cold beat key medium and drain the rock. The spool is loosened to a slightly smaller extent to prevent the refrigerant from being discharged too quickly and losing too much refrigerant oil.

Loosen the valve core of the car air conditioner by adding fluoride and leakage, and the original refrigerant can be discharged.

The degree of loosening of the valve core is slightly smaller to prevent the refrigerant from being discharged too quickly and losing too much cold morning oil.

Loosen the valve core of the car air conditioner with fluorine, and the original refrigerant can be discharged.

The degree of loosening of the valve core is slightly smaller, so as to prevent the refrigerant from being discharged too quickly and losing too much refrigeration oil.

The purpose of fluoride is to replace the refrigerant, and the vacuum pump should be used to vacuum close the valve to maintain negative pressure, and the weight of the refrigerant should be weighed by an electronic scale after passing the new refrigerant filling.

Connect it with a pressure gauge, turn on the switch and let it go.

Automobile air conditioner release refrigerant step method.

When repairing the car air conditioner, sometimes we need to release the refrigerant of the car air conditioning system from the refrigeration system, and release the refrigerant group lead from the refrigeration system.

The specific method of the agent is as follows:

1) Close the manual high and low pressure valves on the manifold pressure gauge, and connect the high and low pressure hoses to the high and low pressure maintenance valves of the compressor respectively, and connect the middle hose.

The free end is placed on a clean, soft cloth.

2) Slowly open the manual high-pressure valve to let the refrigerant be discharged from the soft cloth in the middle, the valve [ ] can not be opened too much, otherwise the refrigeration oil in the compressor will follow.

Refrigerant outflow.

3) When the pressure gauge reading drops to below, slowly open the manual low-pressure valve to let the refrigerant flow out from the high and low sides.

4) Observe the pressure gauge reading, as the pressure drops, gradually open the manual high and low pressure valve until the low pressure gauge reads to zero.

Just put it off at the fluoride port, the fluoride port has a core like a gas elimination, and if you press it directly, the refrigerant inside will be emittedBe careful not to frostbite your hands

Hello, there are two main ways to add refrigerant to an air conditioner. 1. Filling refrigerant at the high-pressure end: 1. After the system is vacuumed, close the high-pressure and low-pressure manual valves on the manifold pressure gauge.

2. Connect one end of the middle hose with the joint of the refrigerant tank injection valve. 3. After opening the refrigerant tank, unscrew the nut at one end of the manifold pressure gauge hose to let the gas overflow for a while, and then tighten the nut. 4. Open the manual valve on the high-pressure side to the fully open position to make the refrigerant tank stand upside down.

5. Then inject the specified amount of refrigerant from the high-pressure side. When filling, do not open the pressure countering manual valve on the manifold pressure gauge to prevent hydraulic shock. 2. Filling refrigerant at the low-pressure end:

1. Connect the manifold pressure gauge with the compressor and refrigerant tank first. 2. After opening the refrigerant tank, loosen the nut at one end of the manifold pressure gauge hose, and tighten the nut when you hear the sound of steam flowing. 3. Open the low-pressure manual valve to make the refrigerant enter the refrigeration system, and close the low-pressure manual valve when the pressure value of the system reaches it.

4. After that, start the car engine, turn on the air conditioner, and adjust the blower and temperature control switch to the maximum. 5. Open the manual valve on the manifold pressure gauge to let the refrigerant continue to enter the refrigeration system until it is filled to the specified amount. Generally, you have to go to the 4S shop or repair shop to refuel, you need to use professional tools, let them help add it will be better, after the filling amount is full, you can turn on the engine to open the air to adjust the temperature, air conditioning refrigerant is commonly known as refrigerant in the repair shop, is a liquid that can be refrigerated.

If you have the conditions, try to go to the 4S store to add, it will be better, this is generally less to add, generally not less, usually check it more when you maintain it.

Loosen the valve core of the fluorine port of the automobile air conditioner to discharge the original refrigerant.

The spool is loosened to a slightly smaller extent to prevent the refrigerant from being discharged too quickly and losing too much refrigerant oil.

The purpose of fluoride addition is to replace the refrigerant, and the vacuum pump should be used to vacuum close the valve to maintain negative pressure, and the weight of the refrigerant should be weighed with an electronic scale for new refrigerant filling after qualification.

The car air conditioner has a special port for adding refrigerant, and the tube that can be added to the refrigerant can be connected and then discharged!

Summary. Hello, I'm glad to answer for you: I'm here to help you find out, <> want.

When adding fluoridation to the air conditioner, it is required that the inside must be in a vacuum state, otherwise air will be mixed in during the fluoridation process, which will affect the refrigeration effect and the service life of the compressor. Because fluorine is a very important medium in the air conditioning system, if the content is low, the cooling effect of the air conditioner will be worse, if there is no at all, it will not be able to refrigerate. ”

Dear This question is from me, it takes a little time to type, please wait patiently Hello, I'm happy to answer for you: I want to help you find it here, <> want. When adding fluoride to the air conditioner, it is required that the inside must be in a vacuum state, otherwise the air fiber will be mixed into the fluoridation process, which will affect the cooling effect of the silver vertical jujube front, and may affect the service life of the compressor.

Because fluorine is a very important medium in the air conditioning system, if the content is low, the cooling effect of the air conditioner will be worse, if there is no at all, it will not be able to refrigerate. ”