KR20020000966A - Intake hole structure of cylinder part in swash plate type compressor - Google Patents

Abstract

PURPOSE: A suction hole structure is provided to reduce the noise caused due to the compression of liquid refrigerant and prevent burning of the compressor by preventing the liquid refrigerant from entering the cylinder. CONSTITUTION: A swash plate compressor includes a front housing where a front cylinder(100) is incorporated; a rear housing where a rear cylinder is incorporated; and a valve unit installed between cylinders and housings. When the front or rear cylinder is divided into upper and lower sections, the cylinder has suction holes(102a,102b,102c) formed an axial direction so as to suck the low temperature low pressure gaseous refrigerant introduced through a suction port and a suction passage formed at the housings of the compressor. The suction holes(102b,102c) formed in the lower section have sizes to be covered by a coupling member(60) so as to maintain an air tight state.

Description

Suction plate structure of swash plate compressor {INTAKE HOLE STRUCTURE OF CYLINDER PART IN SWASH PLATE TYPE COMPRESSOR}

The present invention relates to a cylinder suction hole structure of a swash plate compressor, and more particularly to a structure of a suction hole formed in a cylinder part of a compressor such that gaseous refrigerant passing through an evaporator and oil for smoothly driving the compressor flow into the cylinder. It relates to a cylinder suction hole structure of a swash plate type compressor to improve the liquid refrigerant from entering the cylinder.

In general, the vehicle receives the external heat as it is through the glass as it is, and has a closed space, and has a cooling device that cools the interior of the vehicle in a hot summer or the like.

1 is a schematic configuration diagram of a vehicle cooling apparatus. As shown in FIG. 1, a vehicle cooling apparatus includes a compressor (2) for adiabatic compression of low-temperature low-pressure gaseous refrigerant to be discharged into a high-temperature high-pressure gaseous refrigerant, and the compressor. (2) An expansion valve for condensing the high-temperature, high-pressure gas refrigerant discharged from the condenser (4) to a saturated state by heat exchange, and the refrigerant liquefied from the condenser (4) to low-saturated wet steam state (6) and a main component including an evaporator (8) which evaporates the refrigerant conveyed from the expansion valve (6) by heat exchange to produce a saturated vapor state and sends it to the compressor (2).

Compressor 2, which is an essential component of such a cooling device, is selectively supplied with the power of an engine (not shown) transmitted through a pulley by an intermittent action of an electromagnetic clutch (not shown) and supplied from the evaporator 8. A device for compressing a refrigerant to be sent to the condenser (4). In particular, the swash plate compressor (2) of the compressor selectively selects the power of the engine through a hub and a disk assembly (not shown) by the intermittent action of the electromagnetic clutch. The disk-shaped swash plate 32 which is received and is fixed to the drive shaft 30 receiving the power of the engine rotates together with the drive shaft 30 in accordance with the rotation of the drive shaft 30, and by the rotation of the swash plate 32. A plurality of pistons 34 coupled by placing the shoe along the circumference of the swash plate 32 are linearly reciprocated inside the plurality of bores 222 and 262 formed in the cylinders 22 and 26 to inhale, compress and discharge the refrigerant gas. To The.

Figure 2 is an exploded perspective view of such a swash plate compressor, Figure 3 is a cross-sectional view of the combination of Figure 2, as shown, the swash plate compressor (2) is a front housing 24 with a built-in front cylinder 22 and And a rear housing 28 coupled with the front housing 24 and having a rear cylinder 26 embedded therein.

The front and rear cylinders 22 and 26 have a plurality of bores 222 and 262 formed in an annular shape therein, and the pistons 34 extend across the corresponding bores 222 and 262 of the front and rear cylinders 22 and 26. These pistons 34 are coupled along the outer circumference of the swash plate 32 which is affixed to the drive shaft 30.

Accordingly, the pistons 34 linearly reciprocate in the bores 222 and 262 of the front and rear cylinders 22 and 26 by the swash plate 32 that rotates according to the rotation of the drive shaft 30.

The gasket 362, the discharge valve 364, the valve plate 366 and the suction between the front housing 24 and the front cylinder 22 and between the rear housing 28 and the rear cylinder 28 are respectively. A valve assembly 36 with a valve 368 is installed. In addition, a suction passage 46 and a discharge passage 48 are formed on the inner surfaces of the front and rear housings 24 and 28 to correspond to the discharge port of the discharge valve 364 and the suction port of the suction valve 368, respectively. The suction passage 46 and the discharge passage 48 of the rear housings 24 and 28 are connected to each other through suction holes 50a, 50b and 50c formed in the front and rear cylinders 22 and 26 so that the front cylinder 22 The suction and compression of the refrigerant may be performed according to the movement of the piston 34 in the bore 262 of the rear cylinder 26 as well as the bore 222.

In addition, a muffler having a suction port 42 and a discharge port 44 in communication with the suction passage 46 and the discharge passage 48 of the front and rear housings 24 and 28 is formed on an upper portion of the outer circumferential surface of the rear housing 28. 40) is installed.

Therefore, the low-temperature low-pressure gas phase refrigerant passing through the evaporator 8 passes through the front and rear housings 24 and 28 through the suction port 42 formed on the outer circumferential surface of the rear housing 28 during the suction stroke of the compressor piston 34. Flows into the suction bore 46 of the cylinder and flows into the cylinder bores 222 and 262 through the suction holes 50a, 50b and 50c of the front and rear cylinders 22 and 26 connected to the suction passage 46, and the piston In the compression stroke of the 34, the compressed refrigerant is discharged into the discharge passages 48 of the front and rear housings 24 and 28, and then through the discharge port 44 of the rear housing 26 to the condenser 4 side. Discharged.

4 and 5 illustrate a suction hole structure of the front cylinder, and the suction hole of the rear cylinder 26 coupled to the front cylinder 22 is also formed in the same shape as the suction hole of the front cylinder 22. In describing the front cylinder 22 as an example, the rear cylinder 26 is also applicable.

As shown in FIG. 4, the suction holes 50a, 50b and 50c of the front cylinder 22 are formed at three positions between the cylinder bores 222, and the suction holes 50a, 50b and 50c are formed. Through the coupling member 60 is penetrated through and fixed to the front, rear cylinders (22, 26).

That is, the coupling having the head 62 from the suction holes 50a, 50b, 50c side of the front or rear cylinders 22, 26 with the front and rear cylinders 22, 26 facing each other in a straight line. By penetrating and inserting the member 60 into the housing of the other side, the front and rear cylinders 22 and 26 are fixedly coupled to the housing.

The suction holes 50a, 50b and 50c of the front and rear cylinders 22 and 26 are gaseous refrigerant discharged from the evaporator 8 side through the suction port 42 and the suction passage 46 into the cylinder bores 222 and 262. The coupling member 60 penetrates and is inserted while being a passage for inflow. Thus, the gaseous refrigerant smoothly flows in the state in which the coupling member 60 penetrates and is inserted into the suction holes 50a, 50b, and 50c. The inner surface of the coupling member 60 may be larger than that of the head 62, and the trapezoidal shape may be formed in a substantially trapezoidal shape to enable suction of the gaseous refrigerant.

Meanwhile, the suction port 42 of the rear housing 28, the suction passage 46 of the front and rear housings 24 and 28, and the suction holes 50a, 50b and 50c of the front and rear cylinders 22 and 26. When the gaseous refrigerant is introduced into the cylinder bores 222 and 262 through), lubricating oil for smoothly driving the compressor 2 is introduced at the same time.

However, a vehicle having such a compressor operates in a variety of environments, and when a vehicle is operated in a season or region where temperature fluctuates severely, the refrigerant in the pipeline between the compressor and the heat exchanger may change into a liquid phase and flow into the compressor. Can be.

In particular, the liquid refrigerant is more likely to be introduced into the cylinder bore through the lower suction hole of the front and rear cylinders because the liquid refrigerant is laid in the lower layer because the weight thereof is slightly larger than that of the gas phase refrigerant.

Since the liquid refrigerant is an incompressible fluid state, a noise such as hammering in the compressor is generated when the compressor is driven, and as the liquid refrigerant is not compressed, the compaction of the compressor and a slimming of the electronic clutch are caused. .

Accordingly, the present invention has been made in order to solve the above problems, the suction hole located in the lower side of the suction hole through which the refrigerant and oil flows in the cylinder of the swash plate compressor is airtight in the state that the coupling member is penetrated, inserted It is formed to be small so as to prevent the liquid refrigerant from flowing into the cylinder of the compressor to prevent noise caused by the liquid compression, and to provide a cylinder suction hole structure of the swash plate type compressor to prevent the compaction of the compressor and the slim phenomenon of the electronic clutch. The purpose is.

1 is a view showing a schematic configuration of a conventional automotive cooling device.

Figure 2 is an exploded perspective view of a conventional swash plate compressor.

3 is a cross-sectional view of the combination of FIG.

Figure 4 is a front view showing a cylinder of the conventional swash plate compressor.

5 is a front view showing a cylinder of the swash plate compressor according to the present invention.

Figure 6 is a front view showing a cylinder of the swash plate compressor according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

2: compressor 24: front housing

28: rear housing 46: suction passage

48: discharge passage 60: coupling member

100,100 ': Cylinder 102a, 102a': Upper side suction hole

102b, 102c: Lower suction hole

The present invention for achieving the above object, the suction port and the suction formed in the housing of the swash plate compressor when the swash plate compressor is divided into the front and rear cylinders up and down on the basis of the fixed state, mounted on the vehicle It is characterized in that the suction hole formed in the lower side of the suction hole formed in the axial direction in the front and rear cylinders to cover the inner surface of the head of the coupling member so as to be airtight so that the low-temperature low-pressure gas phase refrigerant introduced into the passage.

In addition, the present invention, when the swash plate type compressor is divided into the front and rear cylinders up and down on the basis of the state mounted on the vehicle, the suction hole formed in the upper side is a gaseous phase that is not sucked into the suction hole in the lower side In order to compensate for the suction performance of the refrigerant is characterized by consisting of an expanded structure.

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

5 is a view showing a cylinder suction hole structure of the swash plate compressor according to the present invention.

As shown in the drawing, when the compressor divides the cylinder 100 of the compressor up and down based on the state in which the compressor is mounted on the vehicle, the suction holes 102b and 102c positioned at the lower portion thereof are provided with the coupling member 60. It is formed in a size that is kept airtight in the penetrated and inserted state.

In the figure, reference numeral '62' indicates the head of the coupling member.

Therefore, when the front and rear cylinders are fixed and coupled to the front and rear housings by penetrating and inserting the coupling member 60 into the lower suction holes 102b and 102c of the cylinder 100, the lower suction holes are provided. Since the inlet and the outlet sides of the 102b and 102c are blocked by the coupling member 60 and the airtightness is maintained, the refrigerant and the oil introduced through the suction port and the suction passage of the compressor are suction holes 102a of the upper side of the cylinder 100. It is introduced into the cylinder 100 through only).

In this case, when the liquid refrigerant remaining in the conduit flows into the compressor housing through the suction port and the suction passage, the liquid refrigerant has a predetermined weight, so that the liquid refrigerant sinks to the lower side, and further, the lower suction hole of the cylinder 100. The bars 102b and 102c are blocked by the coupling member 60 to prevent liquid refrigerant from flowing into the cylinder 100.

Of course, the above described the front cylinder 100 as an example, but the rear cylinder coupled to the front cylinder 100 has the same configuration.

On the other hand, Figure 6 shows another embodiment of the present invention, in order to prevent the flow of liquid refrigerant into the cylinder in the above embodiment by reducing the suction hole of the lower side of the cylinder to restrict the flow of oil and gas refrigerant and oil In order to prevent the smooth performance of the compressor from being exhibited, as shown in the drawing, the upper suction hole 102a 'of the cylinder 100' is expanded so that the suction performance of the refrigerant and oil is compensated.

As described above, according to the structure of the cylinder suction hole of the swash plate compressor of the present invention, the low-temperature low-pressure gas phase refrigerant through the evaporator and the oil for smoothly driving the compressor are forward and backward through the suction port and the suction passage. When flowing into the cylinder through the suction hole of the cylinder, the relatively heavy liquid refrigerant sinks down. Only the gaseous refrigerant flows into the cylinder through the connecting passage on the upper side, and the liquid refrigerant is prevented from entering the cylinder. Therefore, not only the noise due to the liquid refrigerant compression is reduced, but also the squeezing of the compressor and the slim phenomenon of the electronic clutch are prevented.

Claims (2)

A front housing in which a front cylinder having a plurality of bores is built, a rear cylinder having a plurality of bores, and a rear housing having a suction port and a discharge port formed on an outer circumferential surface thereof, and installed between each cylinder and the housing. Compressing the low-temperature low-pressure gaseous refrigerant discharged from the evaporator to a high-temperature high-pressure gaseous refrigerant comprising a valve unit, the suction and discharge passages are formed on the inner surface of the front and rear housings in communication with the suction port and discharge port The front and rear cylinders have a suction hole communicating with the suction passage in the axial direction, and the air conditioning apparatus for a vehicle having a structure in which a coupling member having a head passes through and is inserted into the suction holes of the respective cylinders. In swash plate compressor, When the swash plate-type compressor is divided into the front and rear cylinders up and down on the basis of the state of mounting and fixed to the vehicle, the suction hole formed in the lower side is covered with a coupling member and formed to be airtight. The cylinder suction hole structure of the swash plate type compressor. The method of claim 1, When the compressor divides the front and rear cylinders up and down on the basis of the fixed state of the vehicle, the suction hole formed in the upper side of the compressor compensates the suction performance of the gaseous refrigerant that cannot be sucked into the suction hole in the lower side. Cylinder portion suction hole structure of the swash plate type compressor, characterized in that the expansion is formed in order to form.