What is the difference between different air conditioning compressors? Why does a compressor with a

The power of different air conditioning compressors and other aspects are different. Let's take a look at a few knowledge points about air conditioning compressors.

The first knowledge point: the power of different air conditioning compressors can be considered proportional.

The emission is multiplied by the rotational speed, which is determined by the combination of the emission and the rotational speed.

The second knowledge point: the so-called energy efficiency ratio of air conditioners or compressors.

That is, COP, when the compressor is refrigerated or heated, it is not directly refrigerated or heated, but to carry the heat, so if its compressor power is two kilowatts, it can actually carry the heat and cooling capacity, which can reach four kilowatts or six kilowatts, and the vehicle is basically this range, which is the concept of COP.

The third knowledge point: air conditioning compressors can be roughly divided into three types.

The first is a vortex automotive air conditioning compressor.

This is an air conditioning compressor with a constant displacement, but because its rotation is driven by the engine, it has a clutch.

It starts to rotate with the engine, although the displacement is fixed, but the speed changes, so its power has also changed. But the change is uncontrolled, it is according to the engine or the car's working conditions, not according to the demand for cooling and heating, so as long as the car is driven faster, then the power of the air conditioner will increase, and the fuel consumption will increase accordingly.

The second is the piston automobile air conditioning compressor, which is a variable displacement air conditioning compressor, and can also be made into a fixed displacement air conditioning compressor. Put the displacement of the car.

change, then the power consumption can be reduced. Early displacement changes can be made into two orders, 50 percent and 100 percent, which can reduce power consumption by half. Now good technology can be reduced to 5% to 100% of the range of variation, so that the power consumption can be greatly reduced, and it can be more energy-saving and fuel-efficient.

The third type is the air conditioning compressor for electric vehicles. For a high-pressure electric compressor, it can be like all the inverter air conditioners in the home.

Similarly, the power is regulated by adjusting the speed of the motor. This can also be done to control its power consumption.

This is the reason why the compressor with a fixed displacement consumes oil, and the variable displacement and frequency conversion can save fuel.

Different compressors have different performance, different oil consumption, different power, different manufacturing costs, the more powerful the compressor, the better the refrigeration effect, because this compressor needs to burn oil all the time to maintain operation, so it is more fuel-intensive.

The effect of the compressor is different, the power of the compressor is not the same, the compression function of the compressor is different, and the fuel consumption of the compressor is different. Because a fixed-displacement compressor has a fixed displacement during compression, more oil is used to achieve the same displacement.

The size of the compressor of different air conditioners is different, the energy consumption is also different, the cold air generated is different, the use method is different, and the compressor with a fixed displacement needs to run stably for a long time, so it consumes more oil.

The automotive air conditioning compressor is the heart of the automotive air conditioning and refrigeration system, which plays the role of compressing and transporting refrigerants.

The compressor has two important functions:

1.Creates low-pressure conditions within the system. (Makes the gaseous refrigerant coming out of the evaporator enter the compressor) 2The gaseous refrigerant is compressed from low pressure to high pressure and the temperature is raised.

What is the difference between a constant displacement and a variable displacement air conditioning compressor:

The so-called displacement is the total volume of the space through which the piston does reciprocating motion in the piston cylinder.

1. The dismantling of the exhaust volume of the fixed displacement air conditioning compressor is proportionally increased with the increase of the engine speed, which cannot automatically change the power output according to the demand of refrigeration, and has a greater impact on the engine fuel consumption. Its control is generally achieved by collecting the temperature signal of the air outlet of the vapor combustion engine, and when the temperature reaches the set temperature, the air conditioning compressor stops working; When the temperature rises, the compressor starts working. The constant displacement compressor is also controlled by the pressure of the air conditioning system, and when the pressure in the pipeline is too high, the compressor stops working.

2. The variable displacement air conditioning compressor can automatically adjust the power output according to the set temperature. The air conditioning control system does not collect the temperature signal of the air outlet of the evaporator, but controls the compression ratio of the compressor according to the pressure change signal in the air conditioning line, so as to automatically adjust the temperature of the air outlet.

In the whole process of refrigeration, the air conditioning compressor is always working, and the adjustment of refrigeration intensity is completely controlled by the pressure regulating valve installed inside the compressor. When the pressure at the high-pressure end of the air conditioning line is too high, the pressure regulating valve shortens the piston stroke in the compressor to reduce the compression ratio, which will reduce the refrigeration intensity. When the pressure at the high-pressure end drops to a certain level and the pressure at the low-pressure end rises to a certain level, the pressure regulating valve increases the piston stroke to increase the refrigeration intensity.

Advantages and disadvantages of constant displacement compressors: 1) The disadvantages of fixed displacement compressors are that when the working conditions change, the opening of the expansion valve fluctuates periodically, resulting in the first temperature fluctuation of the outlet air. The clutch is controlled by a thermostat to prevent frost formation in the evaporator, which can cause fluctuations in the operating conditions of the air condition.

The periodic engagement of the clutch has an impact on the power of the car, affecting the driving stability of the vehicle and increasing the noise. 2) The advantages of variable displacement compressor are that the suction and exhaust pressure and working hunger of the continuously variable displacement compressor are average, the power consumption is small, and the evaporator does not frost. The working change is stable and has little impact on the engine.

Advantages and disadvantages of constant displacement compressors: 1) Disadvantages of fixed displacement compressors When the working conditions change, the opening of the expansion valve fluctuates periodically, resulting in fluctuations in the temperature of the outlet air; Use the rotten first thermostat to control the clutch to prevent the evaporator from frosting, and then slip to cause fluctuations in the working conditions of the air condition; The periodic engagement of the clutch has an impact on the power of the car, affecting the driving stability of the vehicle and increasing the noise. 2) Advantages of variable displacement compression machine: The suction and exhaust pressure and working torque of the continuously variable displacement compressor fluctuate, the average power consumption, the evaporator does not frost, the working change is stable, and the impact on the engine is small.

1. There will be one more valve on the surface of the variable displacement compressor.

2. After the variable displacement compressor turns on the air conditioner to shout, he has been rotating and working, and will not stop with the electromagnetic clutch, if there is no electric balance dust magnetic clutch, he is a variable displacement compressor.

3. You can use the computer to read the data stream to read the data of the duty cycle, if there is a number of stations to the empty ratio, it means that this is a variable displacement compressor.

When the variable displacement compressor works at full displacement, there is no difference from the low pressure of the fixed displacement compressor. When the variable displacement compressor works with a small displacement, the low pressure of the compressor is maintained at the set pressure, which is higher than the low pressure of the fixed displacement compressor.

There is a difference.

Constant displacement compressor: under different working conditions (temperature, speed, mode), the displacement remains the same, therefore, the low pressure changes greatly. At high temperatures, idling, up to 3 bar. Low temperature, high speed, lower than depending on the temperature control) is carried out defrost protection, repeated fluctuations.

Variable displacement compressor: When the suction pressure is higher, the compressor always operates with a large displacement. When the displacement is abundant and the low pressure is lower, the displacement is reduced so that the low pressure is kept nearby.

Only when (in rare cases) the minimum displacement, usually 10% of the maximum displacement, is still low pressure will drop, cut off the compressor defrosting protection.

The pressure-regulated variable displacement compressor is a continuous variable capacity air conditioning compressor used in Volkswagen series cars. The working stroke of the piston of this compressor can be changed according to the ratio of high and low pressure pressure. The change of piston stroke directly affects the compression ratio of the compressor, so as to adjust the output power of the refrigerant, change the refrigeration efficiency, and save fuel consumption to a certain extent.

Under normal working conditions, the compressor is in continuous operation and does not clutch action. The inclination of the rotating swash plate determines the stroke of the piston. The inclination of the swash plate depends on the pressure in the chamber, the pressure at the top and bottom of the piston, and the spring force before and after the swash plate.

The pressure in the chamber depends on the high and low pressure on both sides of the regulating valve and the size of the throttling pipe. Variable displacement compressors have the advantage of automatic adjustment.