KR20030006298A - Air conditioning system for reducing slugging noise of compressor - Google Patents

Abstract

PURPOSE: An air-conditioner system for reducing slugging noise of compressor is provided to eliminate slugging noise of the compressor. CONSTITUTION: A liquefied refrigerant inflow preventing muffler(11) is installed between an evaporator and a compressor. The liquefied refrigerant inflow preventing muffler includes a first pipe(11a) connected with the evaporator and inserted deeply into an inside thereof and a second pipe(11b) connected with the compressor inserted more shallowly than the first pipe. Liquefied refrigerant is collected in the muffler through the first pipe but is prevented from flowing into the second pipe.

Description

Air conditioning system for reducing slugging noise of compressor

The present invention relates to an air conditioning system of a motor vehicle, and more particularly, to an air conditioning system for reducing sludge noise of a compressor caused by a liquid flowing into a compressor.

Typically, an air conditioner in a vehicle simultaneously adjusts the temperature (heating and cooling), humidity (humidification or humidity), cleanliness (filtration) and dispersion (circulation) of air in an enclosed space, such as in a vehicle, depending on the purpose of the space in the vehicle. The air conditioner of the vehicle includes a cooling device and a heating device (when a heater is included). The air conditioner lowers the air temperature and humidity in the car, and the heating device increases the temperature and humidity in the car.

1 schematically shows the configuration of a typical automobile air conditioner. The air conditioner is composed of a refrigerant compressor 1, a condenser 2, a receiver 3, a receiver dryer, an expansion valve 4, an evaporator and a heater unit 5, and a condenser fan 6. The air conditioner of an automobile operates on the same operating principle as a conventional steam compressed refrigerator. That is, the refrigerant compressor 1 is operated by an engine in the case of a passenger car, and when the switch 10 is turned on, an electromagnetic clutch (not shown) connected to the switch 10, the condenser fan 6, the receiver 3 The high pressure sensor 13 and the low pressure sensor 14 installed in) are operated. By the on operation of the switch 10, the electromagnetic clutch 12 connects the compressor 1 to the engine of the automobile, and the compressor 1 receives the power of the engine to compress the refrigerant into a high-pressure gas state.

The refrigerant compressed to a high-pressure gas is sent to the condenser 2 through a pipe connected to the compressor 1. The refrigerant is condensed into a high pressure liquid in the condenser 2 and sent to the receiver 3. In the receiver 3, the refrigerant is dehumidified, and the pressure is sensed by the high pressure sensor 13 and the low pressure sensor 14. The high pressure sensor 13 detects the high pressure refrigerant pressure coming from the condenser 6 into the receiver 3, and the low pressure sensor 14 measures the pressure of the refrigerant sent from the receiver 3 to the expansion valve 4. Detect. The pressure signal sensed by the sensors 13 and 14 is input to the ECU.

The refrigerant maintained at a constant pressure through the receiver 3 is sent to the expansion valve 4, and the refrigerant passes through the expansion valve 4 to form a low-temperature, low-pressure liquid and is installed in the vehicle. Is sent to (5).

The refrigerant entering the evaporator and the heater unit 5 is sensed by a temperature sensor (not shown). The refrigerant is converted into a low pressure gas state while passing through the evaporator and heater unit 5, and the surrounding hot air blown by the condenser fan 6 passes through the evaporator and heater unit 5, while the evaporator and heater It is cooled by heat exchange with the refrigerant in the unit 5 and sent to the vehicle by an evaporator fan. The refrigerant enters a low pressure gas state while passing through the evaporator and the heater unit 5 and is sent to the compressor 1 for continuous circulation in the air conditioner.

On the other hand, the saturated water contained in the air is condensed and humidified in the evaporator and the heater unit 5, and the condensed water condensed on the surface of the evaporator and the heater unit 5 is a drip tray (located below the evaporator and the heater unit 5). Collected and discharged outside the vehicle through a hose (not shown) connected to the drip tray.

However, in the conventional air conditioning system of the above-described vehicle, when the vehicle is parked for a long time, the refrigerant of the evaporator moves to the compressor by day and night crossover, so that the liquid refrigerant is formed in the compressor, so that the initial structure of the air conditioning system is At the same time, there was a problem that sludge noise occurs in the compressor.

In order to prevent the occurrence of sludge noise in such a compressor, a method using a check valve has emerged, but there is a problem of causing waste of foreign currency because accurate control is not made and it depends on imports.

It is therefore an object of the present invention to provide an air conditioning system that can eliminate sludge noise in a compressor in a simple manner.

1 schematically shows an air conditioning system of a typical vehicle.

2 is a schematic diagram of an air conditioning system for reducing sludge noise of a compressor according to the present invention;

3 is a cross-sectional view schematically showing the interior of the liquid refrigerant prevention muffler used in the air conditioning system for reducing the sludge noise of the compressor shown in FIG.

(Explanation of symbols for the main parts of the drawing)

1: compressor 2: condenser

3: receiver 5: evaporator or evaporator and heater unit

11: Muffler for preventing liquid refrigerant inflow

An object as described above includes a compressor for compressing a refrigerant into a high pressure gas state; A receiver for removing moisture in the refrigerant compressed by the compressor; A condenser for condensing the compressed refrigerant from the compressor and discharging hot air; An evaporator for converting the refrigerant condensed in the condenser into a low pressure gas state, and cooling an ambient air heated by the condenser; In a vehicle air conditioning system including a heater for heating external air, a liquid refrigerant inflow prevention muffler is provided between the evaporator and the compressor, and the liquid refrigerant inflow prevention muffler has a first pipe connected to the evaporator. A pipe inserted deeply and connected to the compressor can be achieved by an air conditioning system according to the invention, characterized in that the pipe is inserted shallower than the first pipe.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a schematic diagram of an air conditioning system for reducing sludge noise of a compressor according to the present invention, and FIG. 3 is a schematic view of an interior of a liquid refrigerant prevention muffler used in an air conditioning system for reducing sludge noise of a compressor shown in FIG. 2. It is shown in cross section.

As shown in Figures 1 and 2, the air conditioning system for reducing sludge noise of the compressor according to the present invention has a muffler (11) for preventing the introduction of liquid refrigerant in the refrigerant path line between the evaporator (5) and the compressor (1) Is provided. In the liquid refrigerant inflow prevention muffler 11, two pipes 11a and 11b are inserted therein so that the liquid refrigerant flowing from the evaporator 5 is collected at the lower end of the muffler 11.

The first pipe 11a connected to the refrigerant path line connected to the evaporator 5 among the two pipes 11a and 11b is inserted into the depth of the muffler 11 and connected to the refrigerant path line connected to the compressor 1. The second pipe 11b is inserted shallower than the first pipe 1a.

Therefore, when the air conditioning system is activated, the air conditioning system is normally operated, and when the vehicle is parked for a long time, the liquid refrigerant is inside the muffler 11 through the first pipe 11a inserted into the inner depth of the muffler 11. The liquid refrigerant collected in the muffler 11 is shallowly inserted into the muffler 11 by the second pipe 1b connected to the refrigerant path line of the compressor 1 so that the liquid refrigerant flows into the compressor 1. Can be prevented. In addition, since the liquid refrigerant collects in the muffler 11 even during normal operation, the liquid compression of the compressor 1 can be prevented.

According to the air conditioning system according to the present invention having the structure as described above, the sludge noise in the compressor can be removed by a simple method.

Claims (1)

A compressor for compressing the refrigerant into a high pressure gas state; A receiver for removing moisture in the refrigerant compressed by the compressor; A condenser for condensing the compressed refrigerant from the compressor and discharging hot air; An evaporator for converting the refrigerant condensed in the condenser into a low pressure gas state, and cooling an ambient air heated by the condenser; In the air conditioning system of a vehicle comprising a heater for heating the outside air, A liquid refrigerant inflow prevention muffler is provided between the evaporator and the compressor, and the liquid refrigerant inflow prevention muffler has a first pipe connected to the evaporator more deeply inserted therein, and the pipe connected to the compressor is shallower than the first pipe. Air conditioning system, characterized in that it is inserted.