Discharging part structure for compressor

TECHNICAL FIELD

The present invention relates to a compressor having a Z-plate corresponding to a rotary compressor, and particularly, to a discharging part structure of a compressor, in which a fluid compressed in a cylinder is discharged outside the cylinder.

BACKGROUND ART

Generally, a compressor is a device for converting mechanical energy into compression energy of a compression fluid, and a refrigerating compressor is largely classified into a reciprocating compressor, a scroll compressor, a centrifugal compressor, and a rotary compressor by compression methods.

The present applicant has developed a compressor having a Z-plate with a novel concept, which can be classified into the rotary compressor (hereinafter, will be called as ‘Z’-compressor), and filed an application for the invention to the Korean Industrial Patent Office (Application No. 10-1999-42381, Application date: Oct. 1, 1999), which has been disclosed in May 7, 2001 with a Patent Laid-open publication number 2001-35687.

FIGS. 1

,

2

A,

2

B, and

3

illustrate a Z-compressor filed by the present applicant, wherein the Z-compressor includes a motor unit mounted at an inner side of a hermetic container

10

for generating a driving force, and a compression unit mounted at a bottom portion of the motor unit for receiving the driving force and compressing gas.

The motor unit includes a stator S fixed at an inner side of the hermetic container

10

, and a rotator R rotatably engaged to an inner side of the stator S.

Also, the compression unit includes a cylinder assembly D having an inner space V and provided with a suction flow path f

1

and a discharge flow path f

2

connected to the inner space V to be fixed to the hermitic container

10

, and a rotary axis

20

engaged to the motor unit by being inserted to a center of the inner space V of the cylinder assembly D.

The cylinder assembly D includes a cylinder

30

fixed to an inner circumference wall of the hermetic container

10

by being provided with a through hole

31

of a cylindrical shape therein, and upper and lower bearings

40

and

50

respectively engaged to upper and lower portions of the cylinder

30

to form the inner space V with the cylinder

30

and having the rotary axis

20

penetrating therein.

The suction flow path f

1

of the cylinder assembly D is composed of a suction hole formed to be connected to the through hole

31

at an outer circumference of the cylinder

30

. Also, the discharge flow path f

2

of the cylinder assembly D includes an opening

32

penetrated as an axis direction so as to have a predetermined width and a depth at one side of the cylinder

30

, and first and second discharge holes

33

and

34

respectively formed at a frontal wall of the opening

32

of the cylinder

30

to be connected to the through hole

31

.

At this time, the first and second discharge holes

33

and

34

are respectively formed in parallel in an axial direction with a predetermined interval.

A Z-plate

60

is provided to divide the inner space V of the cylinder assembly D into first and second spaces V

1

and V

2

. The Z-plate

60

is formed at the rotary axis

20

as a unit so as to be located at the inner space V of the cylinder assembly D. Also, vanes

70

elastically supported to be always contacted to both sides of the Z-plate

60

and moving for converting the first and second spaces V

1

and V

2

into a suction region and a compression region, respectively, are penetrated to the upper bearing

40

and the lower bearing

50

of the cylinder assembly D, respectively, and engaged thereto.

The vanes

70

are located at upper and lower portions of the Z-plate

60

, that is, they have a same phase when the cylinder assembly D is seen at a horizontal view. At this time, the vanes

70

are respectively inserted to the vane slots

41

and

51

formed in the upper bearing

40

and the lower bearing

50

of the cylinder assembly D.

The Z-plate

60

is formed as a circular shape having a predetermined thickness, and when seen at a lateral side, the Z-plate is composed of an upper convex curved surface portion r

1

having a convex side, a lower concave curved surface portion r

2

having a concave side, and a connection curved surface portion r

3

for connecting the r

1

and r

2

. That is, the Z-plate

60

is a curved surface of a sine wave, wherein the convex curved surface portion r

1

and the concave curved surface portion r

2

are located with an angle of 180° each other.

Also, as shown in

FIGS. 2A and 2B

, an open/close means

80

is engaged to the cylinder assembly D for opening/closing the discharge flow path f

2

and discharging gas compressed in the compression region of the first and second spaces V

1

and V

2

. A suction pipe

90

is engaged to the suction flow path f

1

of the cylinder assembly.

The open/close means

80

includes a first discharge valve

81

engaged to a frontal wall of the cylinder opening

32

of the cylinder assembly D by an engaging bolt B for opening/closing the first discharge hole

33

, and a second discharge valve

82

engaged to a frontal wall of the cylinder opening

32

of the cylinder assembly D by an engaging bolt B for opening/closing the second discharge hole

34

.

Oil is filled at a bottom surface of the hermetic container

10

, an oil flow path

21

is formed at an inner side of the rotary axis

20

, and an oil feeder (not shown) is mounted at an inner side of the oil flow path

21

of the rotary axis

20

(Refer to FIG.

1

).

A reference numeral

100

denotes an elasticity supporting means,

110

denotes a muffler and

99

denotes a discharge pipe.

Operations of the conventional Z-compressor will be explained.

First, if a power is applied to drive the motor unit, the rotary axis

20

rotates by receiving a driving force of the motor unit and the Z-plate

60

of the rotary axis

20

rotates at the inner space V of the cylinder assembly D.

As shown in

FIG. 4

, if an end portion of the convex curved surface portion r

1

of the Z-plate

60

is located at a position a

1

of the vanes

70

corresponding to the first and second spaces V

1

and V

2

, gas compressed in the first space V

1

is discharged to the first discharge hole

33

by an operation of the first discharge valve

81

. If the discharge is completed, suction of the gas into the suction region is completed, gas is sucked to the suction region from the second space V

2

, and gas compression starts at the compression region. At this time, the second discharge hole

34

is closed by the second discharge valve

82

.

Subsequently, the Z-plate

60

rotates, as shown in

FIG. 5

, if an end portion of the concave curved surface portion r

2

of the Z-plate

60

is located at the position a

1

of the vanes

70

corresponding to the first and second spaces V

1

and V

2

, gas is sucked to the suction region from the first space V

1

, and gas compression starts at the compression region under a state that the first discharge hole

33

is closed by the first discharge valve

81

. Then, gas discharge to the second discharge hole

34

in the second space V

2

by opening the second discharge valve

82

is completed and gas suction into the suction region is completed.

That is, whenever the Z-plate

60

rotates one time, gas is sucked, compressed, and discharged in the first and second spaces V

1

and V

2

, which is repeated.

Also, refrigerant gas in high temperature and high pressure discharged through the first and second discharge holes

33

and

34

is exhausted through the cylinder opening

32

of the cylinder assembly D, passes inside of the hermetic container

10

, and discharged at an outer side of the hermetic container

10

.

As the rotary axis

20

rotates, the oil filled at a bottom surface of the hermetic container

10

is fed by an oil feeder engaged to the rotary axis

20

, sucked through the oil flow path

21

of the rotary axis

20

, and supplied to a component in which a sliding takes place. The oil supplied to the component returns to the hermetic container

10

again.

However, in the conventional Z-compressor, as the Z-plate

60

rotates, gas in high temperature and high pressure compressed in the first and second spaces V

1

and V

2

of the cylinder assembly, respectively, is discharged through the first and second discharge holes

33

and

34

alternately and repeatedly. During said process, oil supplied to the inner space V of the cylinder assembly is mixed with the refrigerant gas and discharged, and the refrigerant gas in high temperature and high pressure mixed with the oil circulates a refrigerating cycle through the discharge pipe

99

. According to this, the oil discharged with the refrigerant gas is accumulated at an inner side of the refrigerating cycle, thereby lowering a refrigerating efficiency. Besides, since oil is deficient at the inner side of the hermetic container

10

, a performance of the compressor is lowered.

Also, as shown in

FIG. 6

, the refrigerant gas in high temperature and high pressure discharged through the first and second discharge holes

33

and

34

collides to the hermetic container

10

facing the first and second discharge holes

33

and

34

and shakes the hermetic container

10

, thereby generating vibration noise.

Also, as shown in

FIG. 2B

, the open/close means

80

for opening/closing the first and second discharge holes

33

and

34

is composed of the first discharge valve

81

, the second discharge valve

82

, and first and second engaging bolts B for fixing and engaging the first and second discharge valves

81

and

82

respectively, thereby having many components. According to this, fabricating processes are increased, so that a fabrication productivity is lowered and a fabrication cost is enhanced.

DISCLOSURE OF THE INVENTION

Therefore, it is an object of the present invention to provide a discharge part structure of a compressor which minimizes oil mixed to refrigerant gas and discharged through a discharge pipe when refrigerant gas in high temperature and high pressure compressed and discharged in the first and second spaces in the cylinder assembly is discharged through the discharge pipe as a Z-plate rotates by receiving a driving force of a motor unit.

It is another object of the present invention to provide a discharge part structure of a compressor which minimizes vibration noise when refrigerant gas in high temperature and high pressure compressed and discharged in the first and second spaces in the cylinder assembly is discharged through the discharge pipe as a Z-plate rotates by receiving a driving force of a motor unit.

It is another object of the present invention to provide a discharge part structure of a compressor which simplifies a construction of a discharge valve and its construction components.

To achieve these objects, there is provided a discharge part structure of a compressor comprising a hermetic container; a cylinder assembly fixed to an inner side of the hermetic container and having a suction flow path and a discharge flow path; a Z-plate in the cylinder assembly for dividing an inner space into a plurality of compression spaces and for making a fluid be sucked, compressed, and discharged by being rotated by a motor unit; and vanes contacted to both sides of the Z-plate for dividing the respective compression spaces into a suction region and a compression region by reciprocation, wherein an oil filtering space having a predetermined volume is formed at an outer side of the discharge flow path of the cylinder assembly, and a discharge hole is formed at a means for forming the oil filtering space so as to discharge a fluid which passed through the oil filtering space to an inner side of the hermetic container.

The oil filtering space is provided with an opening groove having a predetermined depth to be connected to the discharge flow path at one side of an outer circumference wall of the cylinder assembly, thereby having a predetermined volume with an inner circumference surface of the hermetic container.

The opening groove of the oil filtering space is covered with a cover member.

The discharge flow path is formed with first and second discharge holes connected to the oil filtering space from respective compression spaces. Also, a means for opening/closing the first and second discharge holes includes a valve body portion fixed at a lateral side of the cylinder assembly by one engaging bolt, and first and second open/close arm portions extended from the valve body portion respectively for opening/closing the first and second discharge holes.

To achieve these objects, there is provided a discharge part structure of a compressor comprising a cylinder assembly having a suction flow path and a discharge flow path; a Z-plate in the cylinder assembly for dividing an inner space into a plurality of compression spaces and for making a fluid be sucked, compressed, and discharged by being rotated by a motor unit; and vanes contacted to both sides of the Z-plate for dividing the respective compression spaces into a suction region and a compression region by reciprocation, wherein a mounting recess is formed at an outer side of the cylinder assembly to be connected to the discharge flow path, a cover member is engaged to the mounting recess so as to form a buffering space connected to the discharge flow path, and a discharge hole for exhausting a fluid is formed to the cover member.

To achieve these objects, there is provided a discharge part structure of a compressor comprising a cylinder assembly having a suction flow path and a discharge flow path; and a Z-plate in the cylinder assembly for dividing an inner space into a plurality of compression spaces and for making a fluid be sucked, compressed, and discharged by being rotated by a motor unit, wherein the discharge flow path is formed with first and second discharge holes connected to an outer side of the cylinder assembly from the respective spaces, and a means for opening/closing the first and second discharge holes includes a valve body portion fixed at a lateral side of the cylinder assembly, and first and second open/close arm portions extended from the valve body portion respectively for opening/closing the first and second discharge holes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1

is a longitudinal sectional view showing a Z-compressor in accordance with the conventional art;

FIG. 2A

is a cross-sectional view showing a conventional Z-compressor;

FIG. 2B

is a front view of a discharge valve;

FIG. 3

is a cut perspective view showing a compression unit of a conventional Z-compressor;

FIGS. 4 and 5

are cross-sectional views respectively showing operation processes of the compression unit of a conventional Z-compressor;

FIG. 6

is a schematic sectional view taken along Z—Z line of

FIG. 5

;

FIG. 7

is a longitudinal sectional view showing a Z-compressor having a discharge part structure according to the present invention;

FIG. 8

is a cross-sectional view showing a Z-compressor having a discharge part structure according to an embodiment of the present invention;

FIG. 9

is a view seen from Y—Y line of

FIG. 8

;

FIG. 10

is a view seen from X—X line of

FIG. 8

;

FIG. 11

is a partial cut perspective view showing a compression unit according to one embodiment of the present invention;

FIG. 12

is a sectional view showing a discharge operation state according to one embodiment of the present invention;

FIG. 13A

is a cross-sectional view of a Z-compressor having a discharge part structure according to another embodiment of the present invention;

FIG. 13B

is a front view of a discharge valve;

FIG. 14

is a partial cut perspective view showing a compression unit according to another embodiment of the present invention.

FIG. 15

is a disassembled perspective view showing a discharge part structure according to another embodiment of the present invention;

FIG. 16

is a disassembled perspective view showing a discharge part structure according to a variation of the another embodiment of the present invention;

FIG. 17

is a sectional view showing an operation state of a discharge part structure according to another embodiment of the present invention;

FIG. 18

is a cross-sectional view showing a Z-compressor having a discharge part structure according to another embodiment of the present invention;

FIG. 19

is a front view showing a discharge valve of

FIG. 18

; and

FIG. 20

is a partial cut perspective view showing a compression unit according to another embodiment of the present invention.

MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS

Hereinafter, preferred embodiments of a discharge part structure of a compressor according to the present invention will be explained with reference to attached drawings.

FIGS. 7

to

12

illustrate a Z-compressor according to one embodiment of the present invention, wherein the same constructions with those of the conventional art will be endowed the same reference numerals.

A Z-compressor according to the present invention includes a motor unit mounted at an inner side of a hermetic container

10

for generating a driving force and a compression unit mounted at a bottom portion of the motor unit for receiving the driving force and compressing gas.

The motor unit includes a stator S fixed at an inner side of the hermetic container

10

, and a rotator R rotatably engaged to an inner side of the stator S.

Also, the compression unit includes a cylinder assembly having an inner space V and provided with a suction flow path f

1

and a discharge flow path f

2

connected to the inner space V to be fixed to the hermetic container

10

, and a rotary axis

20

engaged to the motor unit by being inserted to a center of the inner space V of the cylinder assembly D.

The cylinder assembly D includes a cylinder

30

fixed to an inner circumference wall of the hermetic container

10

by being provided with a through hole

31

of a cylindrical shape therein, and upper and lower bearings

40

and

50

respectively engaged to upper and lower portions of the cylinder

30

to form the inner space V with the cylinder

30

and provided with the rotary axis

20

penetrating therein.

The suction flow path f

1

of the cylinder assembly is composed of a suction hole formed to be connected to the through hole

31

at an outer circumference of the cylinder

30

.

Also, the discharge flow path f

2

of the cylinder assembly includes first and second discharge holes

33

and

34

for respectively connecting an inner circumference wall of the through hole and an outer wall of the cylinder at one side of the cylinder

30

.

At this time, the first and second discharge holes

33

and

34

are respectively formed in parallel in an axial direction with a predetermined interval. Also, an opening groove

36

having a predetermined area and depth is formed at the outer circumference wall of the cylinder assembly

30

to be connected to the discharge flow path f

2

.

At this time, formed is an oil filtering space Q having a predetermined volume between the cylinder opening groove

36

of the cylinder assembly and an inner circumference surface of the hermetic container

10

contacted with the cylinder outer circumference wall of the cylinder assembly.

Also, a discharge hole

42

for discharging the gas which passed through the oil filtering space Q into the hermetic container

10

is formed at one side of the cylinder

30

of the cylinder assembly, and an oil exhausting hole

37

for exhausting oil filled at the oil filtering space Q is formed at the cylinder

30

of the cylinder assembly.

The discharge hole

42

of the cylinder assembly is preferably formed through one side of the cylinder

30

constituting the cylinder assembly D and the upper bearing

40

engaged to the cylinder

30

. Also, the discharge hole

42

is formed towards the axis direction of the cylinder assembly D. The cylinder oil exhausting hole

37

is formed towards a lower surface of the hermetic container

10

.

A Z-plate

60

for dividing the inner space of the cylinder assembly D into first and second spaces V

1

and V

2

is formed to the rotary axis

20

as a unit so as to locate the Z-plate

60

at the inner space V of the cylinder assembly. Also, vanes

70

which move for converting the first and second spaces V

1

and V

2

into a suction region and a compression region respectively as the Z-plate

60

rotates is elastically supported to always be contact to both sides of the Z-plate

60

and inserted to the upper and lower bearings

40

and

50

of the cylinder assembly D.

The vanes

70

are located at upper and lower portions of the Z-plate

60

, that is, they have a same phase when the cylinder assembly D is seen at a horizontal view. Also, the vanes

70

are respectively inserted to vane slots

41

and

51

formed at the upper and lower bearings

40

and

50

of the cylinder assembly D.

The Z-plate

60

is formed as a circle shape having a predetermined thickness, and when seen at a lateral side, the Z-plate is composed of an upper convex curved surface portion r

1

having a convex side, a lower concave curved surface portion r

2

having a concave side, and a connection curved surface portion r

3

for connecting the r

1

and r

2

. That is, the Z-plate

60

is a curved surface of a sine wave, wherein the convex curved surface portion r

1

and the concave curved surface portion r

2

are located with an angle of 180° each other.

Also, an open/close means

80

is engaged to the cylinder assembly D for opening/closing the discharge flow path f

2

and discharging gas compressed in the compression region of the first and second spaces V

1

and V

2

. A suction pipe

90

is engaged to the suction flow path f

1

of the cylinder assembly.

The open/close means

80

includes a first discharge valve

81

engaged to a frontal wall of the cylinder opening

36

of the cylinder assembly by an engaging bolt B for opening/closing the first discharge hole

33

, and a second discharge valve

82

engaged to a frontal wall of the cylinder opening

36

of the cylinder assembly D by an engaging bolt B for opening/closing the second discharge hole

34

.

Oil is filled at a bottom surface of the hermetic container

10

, an oil flow path

21

is formed at an inner side of the rotary axis

20

, and an oil feeder (not shown) is mounted at an inner side of the oil flow path

21

of the rotary axis

20

.

A reference numeral

100

denotes an elasticity supporting means,

110

denotes a muffler and

99

denotes a discharge pipe.

Operations of the discharge part structure of the Z-compressor according to one embodiment of the present invention will be explained.

First, if a power is applied to drive the motor unit M, the rotary axis

20

rotates by receiving a driving force of the motor unit M and the Z-plate

60

of the rotary axis

20

rotates at the inner space V of the cylinder assembly D.

If an end portion of the convex curved surface portion r

1

of the Z-plate

60

is located at a position of the vanes

70

corresponding to the first and second spaces V

1

and V

2

, gas compressed in the first space V

1

is discharged to the first discharge hole

33

by an operation of the first discharge valve

81

. If the discharge is completed, suction of the gas into the suction region is completed, gas is sucked to the suction region from the second space V

2

, and gas compression starts at the compression region. At this time, the second discharge hole

34

is closed by the second discharge valve

82

.

Subsequently, as the Z-plate

60

rotates, if an end portion of the concave curved surface portion r

2

of the Z-plate

60

is located at the position of the vanes

70

corresponding to the first and second spaces V

1

and V

2

, gas is sucked to the suction region from the first space V

1

, and gas compression starts at the compression region under a state that the first discharge hole

33

is closed by the first discharge valve

81

. Then, gas discharge to the second discharge hole

34

in the second space V

2

by opening the second discharge valve

82

is completed and gas suction into the suction region is completed.

That is, whenever the Z-plate

60

rotates one time, gas is respectively sucked, compressed, and discharged in the first and second spaces V

1

and V

2

.

Also, as shown in

FIG. 12

, refrigerant gas in high temperature and high pressure discharged through the first and second discharge holes

33

and

34

is exhausted to an inner side of the hermetic container

10

via the cylinder opening

36

of the cylinder assembly D and the oil filtering space Q, the space Q formed by an inner circumference surface of the hermetic container

10

facing the cylinder opening

36

. Then, the gas exhausted to the inner side of the hermetic container

10

is discharged at an outer side of the hermetic container

10

through the discharge pipe

99

.

As the rotary axis

20

rotates, the oil filled at a bottom surface of the hermetic container

10

is fed by an oil feeder engaged to the rotary axis

20

, sucked through the oil flow path

21

of the rotary axis

20

, and supplied to a component in which a sliding takes place. The oil supplied to the component returns to the hermetic container

10

again.

In the meantime, gas in high temperature and high pressure compressed in the first and second spaces V

1

and V

2

of the cylinder assembly is mixed with oil supplied to the inner space V of the cylinder assembly and discharged with the oil. The oil discharged with the refrigerant gas collides to an inner wall of the oil filtering space Q, filtered, and filled at a bottom surface of the oil filtering space Q in a process of passing the oil filtering space Q. The oil filled at the oil filtering space Q returns to a bottom surface of the hermetic container

10

through the oil exhausting hole

37

.

Accordingly, the refrigerant gas discharged to the discharge pipe

99

through the discharge hole

42

and the inside of the hermetic container

10

via the oil filtering space Q has the minimum amount of mixture with oil.

FIGS. 13A

to

17

illustrate a Z-compressor having a discharge part structure of another embodiment according to the present invention, wherein the same parts with the construction of the aforementioned embodiment will be endowed with the same reference numerals and detailed explanations will be omitted.

Referring to

FIG. 13A

, the suction flow path f

1

of the cylinder assembly is composed of a suction hole formed to be connected to the through hole

31

at an outer circumference of the cylinder

30

.

Also, the discharge flow path f

2

of the cylinder assembly includes first and second discharge holes

33

and

34

formed to penetrate an inner circumference surface and an outer circumference surface of the cylinder

30

. The first and second through holes

33

and

34

are formed on a same line towards upper and lower directions of the cylinder

30

.

Also, as shown in

FIG. 15

, a mounting recess

135

is formed at one side of the cylinder

30

to be connected to the discharge flow path f

2

, a cover member

120

formed with a predetermined shape and having a discharge hole

121

at one side thereof is engaged to the mounting recess. At this time, formed is a buffering space C having a predetermined volume by an outer surface wall of the mounting recess

135

and an inner surface wall of the cover member

120

. The buffering space C is connected to the discharge hole

121

.

The mounting recess

135

of the cylinder assembly D is formed to have a predetermined width and a depth through the outer circumference surface of the cylinder

30

and one side surface, that is, a surface of a side to which the upper bearing

40

is engaged. The cover member

120

has the discharge hole

121

formed to penetrate therein at one side of the body lateral portion

122

of an ‘L’ shape having a width corresponding to that of the mounting recess

135

and a predetermined thickness.

In the cover member

120

, a part where the discharge hole

121

is formed is located at a side where the upper bearing

40

is located, and the other side is located at an outer circumference surface of the cylinder

30

. The part located at the outer circumference surface of the cylinder

30

is preferably located more inwardly than the outer circumference surface of the cylinder

30

.

When the cover member

120

is engaged to the cylinder mounting recess

135

of the cylinder assembly D, a step portion

136

is provided at one side of the mounting recess

135

and a step portion

123

connected with the cylinder step portion

136

is provided at one side of the cover member

120

. At this time, the step portion

123

of the cover member

120

is connected to the step portion

136

of the cylinder by a screw

130

.

As another modification example of the mounting recess

135

of the cylinder assembly D and the cover member

120

engaged to the mounting recess

135

, as shown in

FIG. 16

, the mounting recess

135

of the cylinder assembly D is formed at one side of the cylinder

30

with a predetermined width in a longitudinal direction of the cylinder

30

. Also, the cover member

120

is provided with the discharge hole

121

at one side between both sides of the body lateral portion

122

′ of ‘U’ shape having a width corresponding to that of the mounting recess

135

.

A height of the cover member (as illustrated) is formed to correspond a thickness of the cylinder

30

.

Also, an open/close means

80

for discharging gas compressed in the compression regions V

1

b

and V

2

b

of the first and second spaces V

1

and V

2

is engaged to the cylinder mounting recess

135

of the cylinder assembly D by respectively opening and closing the discharge flow path f

2

of the cylinder assembly D, that is, that first and second discharge holes

33

and

34

.

The open/close means

80

includes the first discharge valve

81

for opening and closing the first discharge hole

33

, the engaging bolt B for engaging the first discharge valve

81

, a second discharge valve

82

for opening and closing the second discharge hole

34

, and the engaging bolt B for engaging the second discharge valve

82

.

In the Z-compressor having a discharge part structure of another embodiment according to the present invention, as the Z-pate

60

rotates one time, gas is sucked, compressed, and discharged respectively at the first and second spaces V

1

and V

2

. As shown in

FIG. 17

, the refrigerant gas in high temperature and high pressure discharged through the first and second discharge holes

33

and

34

passes the buffering space C formed by the cylinder mounting recess

135

and the cover member

120

and is exhausted to an inner side of the hermetic container

10

through the discharge hole

121

formed at the cover member

120

. Then, the gas is discharged to an outer side of the hermetic container

10

through a discharge pipe (not shown) engaged to the hermetic container

10

.

Accordingly, since the refrigerant gas respectively compressed at the first and second spaces V

1

and V

2

of the cylinder assembly is discharged through the first and second discharge holes

33

and

34

and is exhausted to an inner side of the hermetic container

10

through the buffering space C formed by the cover member

120

and the cylinder mounting recess

135

, the refrigerant gas in high temperature and high pressure discharged through the first and second discharge holes

33

and

34

does not directly collide to the hermetic container

10

to which the cylinder assembly

0

is engaged. Therefore, prevented is that the refrigerant gas in high temperature and high pressure collides to the hermetic container

10

and shakes the hermetic container

10

.

In the meantime, the buffering space C formed by the cover member

120

and the cylinder mounting recess

135

also plays a role of the oil filtering space Q of the aforementioned embodiment according to the present invention.

FIGS. 18

to

20

illustrate the Z-compressor having a discharge part structure of another embodiment according to the present invention, wherein the same parts with the construction of the aforementioned embodiment will be endowed the same reference numerals and detailed explanations will be omitted.

As shown in

FIGS. 18

,

19

, and

20

, an open/close means

200

for discharging gas compressed at the compression region V

1

b

and V

2

b

of the first and second spaces V

1

and V

2

is engaged to a front surface wall of the cylinder opening

32

of the cylinder assembly D by respectively opening and closing the discharge flow path f

2

of the cylinder, assembly D, that is, the first and second discharge holes

33

and

34

.

The open/close means

200

includes a multi open/close type discharge valve

220

having two open/close arms

222

and

223

, and one engaging bolt

230

for engaging the open/close type discharge valve

220

to the cylinder assembly D.

The multi open/close type discharge valve

220

includes a valve body portion

221

having a predetermined shape of a thin plate and provided with a screw hole

224

therein, a first open/close arm portion

222

extended to have a predetermined area at one side of the valve body portion

221

, and a second open/close arm portion

223

extended to have a predetermined area of a thin plate at one side of the valve body portion

221

. The first and second open/close arm portions

222

and

223

are formed in parallel each other.

The first open/close arm portion

222

includes an arm

222

a

extended from the valve body portion

221

with a predetermined width and a length, and a circular shape portion

222

b

extended as a circular shape with an outer diameter larger than an inner diameter of the first discharge hole

33

.

The second open/close arm portion

223

includes an arm

223

a

extended from the valve body portion

221

with a predetermined width and a length, and a circular shape portion

223

b

extended as a circular shape with an outer diameter larger than an inner diameter of the second discharge hole

34

.

The front surface wall of the cylinder opening

32

of the cylinder assembly D is formed as a plane surface, and provided with a screw thread hole

236

at one side thereof. The screw thread hole

236

is located to a lateral portion of the first and second discharge holes

33

and

34

.

When the multi open/close type discharge valve

220

is engaged to the front surface wall of the cylinder opening

32

of the cylinder assembly D, the screw hole

224

of the valve unit is unified to the screw thread hole

236

, and the first and second open/close arm portions

222

and

223

are located to close the first and second open/close holes

33

and

34

. At this time, the screw hole

224

of the valve body portion is engaged to the screw thread hole

236

by the engaging bolt

230

.

Operations of another embodiment according to the present invention will be explained.

As the Z-plate

60

rotates at the inner space V of the cylinder assembly D, if an end portion of the convex curved surface portion r

1

of the Z-plate

60

is located at a position of the vanes

70

corresponding to the first and second spaces V

1

and V

2

, gas compressed in the first space V

1

is discharged to the first discharge hole

33

by an operation of the first open/close arm portion

222

. Then, if the discharge is completed, suction of the gas into the suction region V

1

a

is completed, gas is sucked to the suction region V

2

a

from the second space V

2

, and gas compression starts at the compression region V

2

b

. At this time, the second discharge hole

34

is closed by the second open/close arm portion

223

of the multi open/close type discharge valve.

Subsequently, as the Z-plate

60

rotates, if an end portion of the concave curved surface portion r

2

of the Z-plate

60

is located at the position of the vanes

70

corresponding to the first and second spaces V

1

and V

2

, gas is sucked to the suction region V

1

a

from the first space V

1

, and gas compression starts at the compression region V

1

b

under a state that the first discharge hole

33

is closed by the first open/close arm portion

222

of the multi open/close type discharge valve. Then, gas discharge is completed as the second open/close arm portion

223

of the multi open/close type discharge valve opens the second discharge hole

34

in the second space. V

2

. Then, gas suction into the suction region V

2

b

is completed.

That is, whenever the Z-plate

60

rotates one time, gas is sucked, compressed, and discharged in the first and second spaces V

1

and V

2

, which is repeated to compress the gas.

Also, the multi open/close type discharge valve

220

open and close the first and second discharge holes

33

and

34

to discharge gas as the first and second open/close arm portions

222

and

223

are alternately bent and straightened by gas respectively compressed at the first and second spaces V

1

and V

2

of the inner space V of the cylinder assembly as the Z-plate

60

rotates.

Accordingly, since the discharge flow path, that is, the first and second discharge holes

33

and

34

for discharging gas compressed at the first and second spaces V

1

and V

2

, is opened and closed by the multi open/close type discharge valve

220

, and the multi open/close type discharge valve

220

is engaged by one engaging bolt

230

, construction components are simple and a number of fabricating processes are reduced.

In the discharge part structure of the compressor according to the present invention, the refrigerant gas discharged at the first and second spaces of the cylinder assembly, passing an inner portion of the hermetic container, and exhausted through the discharge pipe is mixed with the minimum amount of oil to be discharged outside the hermetic container. According to this, an efficiency lowering of a cycle resulted from that oil is introduced to a refrigerating cycle including the compressor and accumulated is prevented, and oil deficiency in the hermetic container of the compressor is prevented to enhance a reliability.

Also, in the present invention, refrigerant gas in high temperature and high pressure compressed at the first and second spaces of the inner space of the cylinder assembly and discharge through the first and second discharge holes as the Z-plate rotates does not collide to the hermetic container but smoothly flows, thereby minimizing vibration noise at the time of discharging the refrigerant gas in high temperature and high pressure and then enhancing a reliability of the compressor.

Besides, in the present invention, since constructions for discharging gas compressed and the construction components are simplified and a number of a fabricating processes is reduced, a fabricating cost is reduced and a fabricating productivity is enhanced.

Number	Name	Date	Kind
3652191	King et al.	Mar 1972	A
3994638	Garland et al.	Nov 1976	A
4093408	Yamaguchi	Jun 1978	A
4596519	Tuckey	Jun 1986	A
5310326	Gui et al.	May 1994	A

Discharging part structure for compressor

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

US Classifications

Field of Search

US

International Classifications

Abstract

Description

Claims

PCT Information

US Referenced Citations (5)

Foreign Referenced Citations (1)