KR20150048536A - Refrigerant suction apparatus of swash plate type compressor - Google Patents

Abstract

SUMMARY OF THE INVENTION It is a technical object of the present invention to provide a refrigerant suction device for a swash plate type compressor capable of increasing the amount of refrigerant compressed per unit stroke to improve the coefficient of performance of the compressor by improving the volume efficiency. To this end, the refrigerant suction apparatus of the swash plate type compressor of the present invention is a swash plate type refrigerant suction apparatus including a block body having a cylinder bore and a shaft hole formed therein, driving axle; A communication hole formed in the drive shaft to communicate the hollow portion with the shaft bore; A through hole formed in the block body and passing through the gap between the shaft hole and the cylinder bore; And a forced inflow member provided at an end of the drive shaft for forcibly introducing the refrigerant into the hollow portion while the drive shaft rotates.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigerant suction apparatus for a swash plate type compressor,

The present invention relates to a swash plate compressor used for automotive air conditioning and the like.

2. Description of the Related Art Generally, a swash plate type compressor is widely used as a compressor of an air conditioner for an automobile. A swash plate is installed on a shaft to rotate a shaft to convert a swash plate rotational motion into a reciprocating motion of a piston, And compression.

4, the swash plate type compressor 10 disclosed in Korean Patent No. 10-0840915 is provided with a pair of cylinder blocks 11 and 12, a front cylinder A front housing 13 (housing construction body) bonded to the block 11 and a rear housing 14 (housing construction body) joined to the rear side (right side in FIG. 4) cylinder block 12. The front side valve port forming body 15 is interposed between the front cylinder block 11 and the front housing 13 and between the rear cylinder block 12 and the rear housing 14 Side valve port forming body 19 is interposed.

In particular, the refrigerant suction process disclosed in the conventional swash plate type compressor 10 is as follows.

When the rear cylinder bore 29 is in the intake stroke (i.e., the stroke in which the double-headed piston 30 moves from the right side to the left side in Fig. 4), the suction passage 70 communicates with the conduction passage 42 . Therefore, the refrigerant in the swash plate chamber 25 is introduced into the annular groove portion 51 from all the suction recess portions 61 by the pressure difference caused by the lowering of the double-headed piston 30, and introduced into the annular groove portion 51 The refrigerant is sucked into the conduction passage 42 through the suction passage 70. As a result, the refrigerant is sucked into the cylinder bore 28.

However, since the conventional swash plate type compressor has a technical structure in which the refrigerant flows into the cylinder bore 28 due to the pressure difference caused by the descent of the piston 30, there is a limit in introducing the suction refrigerant into the cylinder bore 28.

1. Korean Patent No. 10-0840915 (Registered Date: June 18, 2008)

An object of the present invention is to provide a refrigerant suction apparatus for a swash plate type compressor capable of increasing the amount of refrigerant compressed per unit stroke to improve the coefficient of performance of the compressor by improving the volume efficiency.

In order to achieve the above object, a refrigerant suction device of a swash plate type compressor according to an embodiment of the present invention is a refrigerant suction device for a swash plate type compressor including a block body having a cylinder bore and a shaft hole formed therein, A drive shaft having a hollow portion therein; A communication hole formed in the drive shaft to communicate the hollow portion with the shaft bore; A through hole formed in the block body and passing through the gap between the shaft hole and the cylinder bore; And a forced inflow member provided at an end of the drive shaft for forcibly introducing the refrigerant into the hollow portion while the drive shaft rotates.

The forced inlet member comprising: a forced inlet body having an interior space; A tubular mounting portion formed at one end of the forced air inlet body and mounted on an end of the driving shaft so as to communicate with the hollow portion; A forced inflow hole formed around the forced inflow body; And a coolant catching blade protruding from the periphery of the forced-entry body and formed adjacent to the forced-entry hole.

The forced inflow body may have a cylindrical shape and the refrigerant catching vane may be inclined gradually toward the end of the drive shaft so as to have a concave shape in a direction opposite to the rotating direction of the drive shaft have.

The forced inflow hole may be formed in a recessed portion formed between the refrigerant trapping blade and the forced inflow body.

The forced inflow hole may be formed long in the longitudinal direction of the forced inflow body.

For example, the mounting portion may be coupled to the end portion of the driving shaft.

As another example, a screw thread may be formed on the mounting portion, and a screw groove may be formed on the end of the driving shaft to be engaged with the screw thread, and the mounting portion may be screwed to the end portion of the driving shaft.

As described above, the refrigerant suction device of the swash plate compressor according to the embodiment of the present invention can have the following effects.

According to the embodiment of the present invention, since the drive shaft having the hollow portion, the communication hole, the through hole and the forced introduction member are included, the pressure difference due to the descent of the piston and the forced introduction of the refrigerant by the upper forced introduction member, The amount of refrigerant to be compressed is increased, and the coefficient of performance of the compressor can be improved by improving the volume efficiency.

1 is a cross-sectional view schematically showing a swash plate compressor according to an embodiment of the present invention.
Fig. 2 is a perspective view showing a forced inflow member of the swash plate compressor of Fig. 1;
3 is a cross-sectional view schematically showing one example of engagement between the mounting portion and the drive shaft
4 is a cross-sectional view schematically showing a conventional swash plate type compressor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a cross-sectional view schematically showing a swash plate compressor according to an embodiment of the present invention.

1, a refrigerant suction apparatus for a swash plate compressor according to an embodiment of the present invention includes a block body 100 having a cylinder bore 101 and a shaft hole 102 formed therein, The refrigerant suction device includes a drive shaft (200), a communication hole (300), a through hole (400), and a forced inlet member (500).

The drive shaft 200 is rotatably provided in the shaft hole 102 and has a hollow portion 201 therein. Particularly, the hollow portion 201 serves as a passage through which the refrigerant flows. Further, the swash plate 210 is fixed to the drive shaft 200. Here, the swash plate 210 is fixed to the drive shaft 200 and rotated together with the drive shaft 200 to move the piston 220 in the left and right direction. In particular, the swash plate 210 is rotatably supported by the block body 100 by a thrust bearing (not shown)

The communication hole 300 is formed in the drive shaft 200 to communicate the hollow portion 201 of the drive shaft 200 with the shaft hole 102. In particular, the communication hole 300 serves as a passage for guiding the refrigerant introduced into the hollow portion 201 to the shaft hole 102 side.

The through hole 400 is formed in the block body 100 and penetrates between the shaft hole 102 and the cylinder bore 101. In particular, the through hole 400 serves as a passage for guiding the refrigerant guided to the shaft hole 102 to the cylinder bore 101.

The forced inlet member 500 is provided at an end of the drive shaft 200 to force the refrigerant into the hollow portion 201 while the drive shaft 200 is rotated.

Hereinafter, the forced inflow member 500 will be described in more detail with reference to FIGS. 2 and 3. FIG.

Fig. 2 is a perspective view showing a forced inflow member of the swash plate compressor of Fig. 1, and Fig. 3 is a cross-sectional view schematically showing one example of a coupling between a mounting portion and a drive shaft

The forced inlet member 500 may include a forced inlet body 510, a mounting portion 520, a forced inlet hole 530, and a coolant catch vane 540, as shown in FIG. 2 .

The forced inflow body 510 has a shape having an inner space (511 in FIGS. 1 and 2). In particular, the forced inlet body 510 may have a hollow cylindrical shape with both ends clogged.

The mounting portion 520 is formed at one end of the forced inflow body 510 and has a tubular shape to be mounted on the end of the driving shaft 200 to communicate with the hollow portion 201. That is, the mounting portion 520 serves to connect the drive shaft 200 and the forced air inlet body 510, and to connect the hollow portion 201 of the drive shaft 200 and the inner space 511 of the forced air inlet body 510 It plays a role.

Particularly, in order to engage the drive shaft 200 and the forced inflow body 510, for example, the mount 520 may be forcedly coupled to the end of the drive shaft 200 and, as another example, (1520) may be screwed to the end of the drive shaft (1200). Although not shown in the figure, the outer diameter of the mounting portion 520 may be designed to be larger than the inner diameter of the end portion of the drive shaft 200, as shown in FIG. 3, a screw thread 1521 may be formed on the outer circumferential surface of the mounting portion 1520, and a screw groove (not shown) may be formed on the inner circumferential surface of the end portion of the drive shaft 1200 1201 may be formed on the substrate.

A forced air inlet 530 is formed around the forced air inlet body 510. In particular, the forced inlet hole 530 may be formed in the recessed portion formed between the refrigerant catching blade 540 and the forced inlet body 510, as shown in FIG. Therefore, while the forced inflow member 500 is rotated together with the drive shaft 200, the refrigerant in the refrigerant catch vane 540 can be captured and can be rapidly introduced into the forced air inlet 530. Further, in order to increase the inflow amount of the refrigerant, the forced inflow hole 530 may be formed long in the longitudinal direction of the forced inflow body 510.

The coolant catching blade 540 may be formed around the forced inflow body 510 and adjacent to the forced inflow hole 530. 2, the refrigerant catching vane 540 may have a concave shape in a direction opposite to the rotating direction of the driving shaft 200. In this case, The driving shaft 200 may be tilted in a direction in which the driving shaft 200 rotates. Therefore, while the forced inflow member 500 is rotated together with the drive shaft 200, the refrigerant can be smoothly captured through the recessed shape of the refrigerant catching vane 540. Further, a plurality of such refrigerant catching blades may be formed, and the refrigerant catching blades may be formed at equal intervals around the forced inlet body 510 to match the rotational balance.

Hereinafter, referring to FIG. 1 again, a process of forcibly introducing the refrigerant by the refrigerant suction device of the swash plate type compressor according to the embodiment of the present invention will be described.

As shown in FIG. 1, when the driving shaft 200 is rotated, the forced inflow member 500 is rotated together with the driving shaft 200. During this rotation, the refrigerant trapped by the refrigerant trapping blade 540 of the forced inlet member 500 flows directly into the forced inlet hole 530 and moves to the hollow portion 201 of the drive shaft 200. The refrigerant of the hollow portion 201 thus moved flows into the cylinder bore 101 through the communication hole 300 and the through hole 400 in order.

In addition, when the driving shaft 200 is rotated, the swash plate 210 is rotated together with the pressure difference due to the descent of the piston 220, and the refrigerant flows into the cylinder bore 101.

As described above, the refrigerant suction device of the swash plate type compressor according to the embodiment of the present invention can have the following effects.

According to an embodiment of the present invention, since the driving shaft 200 having the hollow portion 201, the communication hole 300, the through hole 400, and the forced inlet member 500 are included, The amount of refrigerant compressed per unit stroke is increased by the forced introduction of the refrigerant by the upper forced introduction member 500 and the like, so that the coefficient of performance of the compressor through the improvement of the volumetric efficiency can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: Block body 101: Cylinder border
102: shaft yoke 200: drive shaft
201: hollow part 210: swash plate
220: Piston 300: Communicating ball
400: Through hole 500: Forced inlet member
510: forced inflow body 511: inner space
520: mounting portion 530: forced inlet ball
540: Refrigerant capture blade

Claims (7)

1. A refrigerant suction device for a swash plate compressor comprising a block body having a cylinder bore and a bore formed therein,
A drive shaft rotatably mounted on the shaft yoke and having a hollow portion therein;
A communication hole formed in the drive shaft to communicate the hollow portion with the shaft bore;
A through hole formed in the block body and passing through the gap between the shaft hole and the cylinder bore; And
A forced inflow member provided at an end of the drive shaft for forcibly introducing the refrigerant into the hollow portion while the drive shaft is rotating;
And a refrigerant suction device for sucking refrigerant in the swash plate type compressor. The method of claim 1,
The forced entry member
A forced inlet body having an internal space;
A tubular mounting portion formed at one end of the forced air inlet body and mounted on an end of the driving shaft so as to communicate with the hollow portion;
A forced inflow hole formed around the forced inflow body; And
And a refrigerant trapping blade protruding from the forced inlet body and formed adjacent to the forced inlet hole. 3. The method of claim 2,
The forced inflow body has a cylindrical shape,
Wherein the refrigerant catching vane is inclined gradually toward the end of the driving shaft in a direction in which the driving shaft rotates so that the refrigerant catching vane has a concave shape in a direction opposite to the rotating direction of the driving shaft. 4. The method of claim 3,
Wherein the forced inflow hole is formed in a concave portion formed between the refrigerant capturing blade and the forced inflow body. 5. The method of claim 4,
Wherein the forced inlet hole is elongated in the longitudinal direction of the forced inlet body. 3. The method of claim 2,
Wherein the mounting portion is coupled to the end portion of the drive shaft. 3. The method of claim 2,
The mounting portion is formed with a thread,
A screw groove coupled to the screw thread is formed at an end of the drive shaft,
And the mounting portion is screwed to the end of the drive shaft.

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