JP2000220587A - Scroll type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a protrusion rate of a relief valve mechanism, and form a device in a compact size by arranging a pressure relief valve mechanism on an end plate part of a housing, and constituting a valve constituting member in such a way that a seal member is held, and a shuttle valve member moved together with the seal member is arranged. SOLUTION: A protrusion 16f protruded toward an end plate part 101a of a rear housing 101 in a delivery chamber 19 is formed on an end plate part 16as of a fixed scroll 16 in a scroll compressor, and a valve attaching part 101f protruded from an inner wall surface of the end plate part 101a toward the end plate part 16a of the fixed scroll 16 is formed on the end plate part 101a of the rear housing 101. A housing part 101g is formed on the valve attaching part 101f. When a valve function parts of a pressure relief valve mechanism, that is, pressure in a delivery chamber 19 attains a predetermined pressure or more, a shuttle valve member 54 and a seal member 53 which are moved in a right direction against a spring 56 and for blowing out delivery gas from a blowout hole 101n, are housed in the housing part 101g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor, and more particularly, to a scroll compressor having a pressure relief valve.

[0002]

2. Description of the Related Art In a conventional scroll type compressor, a pair of spiral bodies are engaged with each other at an angle, and a relative circular motion (only a revolving motion) is given to a closed space formed between the two spiral bodies in a center direction. This is a positive displacement type fluid compression apparatus in which the volume is reduced while moving to a position where the compressed fluid is discharged from the center.

A conventional scroll compressor is shown in FIG.
As shown in FIG. 1, a housing 10 constituting an outer shell is provided. The housing 10 has a rear housing 101 formed of a large-diameter, bottomed cylindrical body (cup shape), and a front housing 100. Front housing 100
Has a large-diameter cylindrical portion 103 and a small-diameter cylindrical portion 105 fixed to the open end of the rear housing 101.

[0004] The rear housing 101 and the front housing 100 are arranged with the same central axis. A shaft 11 is arranged on the center axis X of the housing 10. The shaft 11 extends through the small-diameter cylindrical portion 105 of the front housing 100 into the housing 10.
The shaft 11 has a small-diameter portion 11a surrounded by a small-diameter cylindrical portion 105 of the front housing 100, and a large-diameter portion 11b surrounded by a large-diameter cylindrical portion 103 of the front housing 100.
And

A drive pin 12 extending parallel to the axis X is eccentrically fixed to the end of the large diameter portion 11b. The large diameter portion 11b of the shaft 11 has a large diameter portion 11b of the front housing 100 via a ball bearing 13.
The small diameter portion 11a is rotatably supported by the small diameter cylindrical portion 105 of the front housing 100 via the ball bearing 14.

[0006] An electromagnetic clutch 15 is disposed on the small-diameter cylindrical portion 105 radially outward. The electromagnetic clutch 15
It has a pulley 15a connected to an external drive source via a V-shaped belt (not shown) and a rotation transmission plate 15c fixed to an end of the small diameter portion 11a. . The shaft 11 is driven to rotate by a drive source.

In the rear housing 101, a fixed scroll 16 is provided. The fixed scroll 16 includes a disc-shaped end plate portion 16a which is disposed concentrically with the axis X and fits into the rear housing 101, and a spiral body 16b formed on one surface of the end plate portion 16a. I have. The fixed scroll 16 has legs 16 formed on the other surface of the end plate portion 16a.
c. The fixed scroll 16 has a leg 16c.
Are fixed to the rear housing 101 by bolts 17 in a state of contacting the end plate portion 101a of the rear housing 101. The internal space of the rear housing 101 is partitioned into a suction chamber 18 and a discharge chamber 19 by an end plate 16 a of the fixed scroll 16.

Further, a movable scroll 20 is arranged in the rear housing 101 adjacent to the fixed scroll 16. The movable scroll 20 has a disk-shaped end plate portion 20a.
And a spiral body 2 formed on one surface of the end plate portion 20a.
0b and an annular boss 20c formed on the other surface of the end plate portion 20a.

Therefore, the pressure in the space on the movable scroll 20 side in the rear housing 101 within the end plate portion 16a becomes the suction pressure. The space surrounding the fixed scroll 16 and the movable scroll 16 is a suction chamber 18. The rear housing 101 is provided with a suction hole (suction port) 18 a communicating with the suction chamber 18 and a discharge hole (discharge port) 19 a communicating with the discharge chamber 19. The suction hole 18a and the discharge hole 19a are sealed by bolts 18m and 19m.

A discharge hole 16d is provided at the center of the end plate 16a.
Are formed. A valve 30 for opening and closing the discharge hole 16 d and a valve retainer 31 for regulating the operation of the valve 30 are provided on the end plate 16 a by bolts 32.
It is fixed to the one.

At the center of the end plate portion 101a of the rear housing 101 facing the discharge hole 16d of the end plate portion 16a of the fixed scroll 16, as shown in FIGS. A valve mounting portion 101c is formed from the inner wall surface of the plate portion 101a to the end plate portion 16b side. A mounting hole 101d penetrating in the axial direction of the shaft 11 is formed in the valve mounting portion 101c. The mounting hole 101d penetrates from the discharge chamber 19 side to the outside of the bottom plate 101a.

The mounting hole 101d is a screw hole for fixing the pressure relief valve 50 with a screw. The pressure relief valve 50 is attached to the valve attachment part 101c. As shown in detail in FIG. 13, the pressure relief valve 50 includes a valve outer member 51 and a housing hole 51a formed in the valve outer member 51 in an axial direction so as to coincide with an axis of the mounting hole 101d. It has a valve function component incorporated in the accommodation hole 51a.

The valve outer shell 51 has a first cylindrical part 51b constituting substantially half of the axial direction of the housing hole 51a, and a second cylindrical part 51c connected to the first cylindrical part 51b.
And a closed end plate portion 51d formed so as to close the housing hole 51a at one end of the housing hole 51a, and a small-diameter through hole 51e formed in a central portion of the closed end plate portion 51d. I have.

A mounting hole 10 is provided on the outer peripheral surface of the first cylindrical portion 51b.
A screw portion 51f to be screwed with the screw portion 1d is formed, and an outer peripheral surface of the second cylindrical portion 51c has a nut shape for screwing the first cylindrical portion 51b and the screw portion 51f. .

The valve function component includes a seal member 53 that contacts the closed end plate portion 51d and moves in the axial direction so as to open and close the through hole 51e. It has a shuttle valve member 54 that moves slightly in the axial direction, a cover plate 55 fixed to the end of the second tubular portion 51c, and a spring 56 interposed between the cover plate 55 and the shuttle valve member 54. ing.

The spring 56 is connected to the shuttle valve member 54.
Of the shuttle valve member 54 and the seal member 53 in the direction of the cover plate 55 when the pressure of the discharge chamber 19 becomes equal to or higher than a predetermined pressure. Then, the discharge gas (refrigerant gas) passes through a gap between the inner wall surface of the first cylindrical portion 51b and the outer peripheral surface of the shuttle valve member 54, and is discharged from the second cylindrical portion 51c to the outside. The cover plate 55 is provided with a vent hole 55a at a central portion thereof to allow the refrigerant gas to escape to the outside, and a peripheral portion of the cover plate 55 is formed by an edge surface 51g on the opening end side of the second cylindrical portion 51c. Tightened and fixed.

Attachment of the pressure relief valve 50 to the end plate portion 101a of the rear housing 101 is performed by a screw portion 51f formed on the pressure relief valve 50. For this reason, the rear housing 10
The end plate portion 101a is provided with a pressure relief valve 5
0 is formed to be thick, and the screw 5
The fitting amount for fitting 1f is secured.

The second cylindrical portion 51c protrudes outside the end plate portion 101a of the rear housing 101. Further, the seal between the pressure relief valve 50 and the end plate portion 101a of the rear housing 101 is formed by an O-ring 5
7 (see FIG. 12).

The center axis Y of the end plate 20a of the orbiting scroll 20 is eccentric from the axis X by a distance rs. The spiral 20b of the movable scroll 20 meshes with the spiral 16b of the fixed scroll 16 with a phase difference of 180 degrees. A thick disk-shaped eccentric bush 21 disposed concentrically with the end plate portion 20a is provided on the boss 20c with a needle bearing 22.
And is rotatably fitted in through the. The eccentric bush 21 is formed with an eccentric through hole 21a extending parallel to the axis X.

A counterweight 23 extending in the radial direction is fixed to the eccentric bush 21. The through hole 21a of the eccentric bush 21 is a large diameter portion 11b of the shaft 11.
Is slidably accommodated therein.
The pin 21b formed on the eccentric bush 21 is
One large diameter portion 11b is fitted into a hole slightly larger in diameter than the pin 21b formed at the end.

Further, a donut plate-shaped front housing-side race (lace member) 24 fixed to the end of the large-diameter cylindrical portion 103 of the front housing 100, and a donut plate fixed to the end plate portion 20 a of the movable scroll 20. A movable scroll-side race (lace member) 25 and a plurality of balls 26 interposed between the front housing-side race 24 and the movable scroll-side race 25 at intervals in the circumferential direction to prevent the movable scroll from rotating. A ball coupling is configured.

In the scroll compressor having the above-described structure, the ball 26 is pressed against the front housing race 24 and the movable scroll side race 25 with the revolution of the movable scroll 20, and the revolving radius rs of the movable scroll 20 is determined. It can smoothly roll by drawing a circular orbit with approximately the same radius. As a result, the movable scroll 20 is connected to the front housing 100 and, consequently, the fixed scroll 16.
Revolve while maintaining a predetermined angular relationship with respect to.

In the conventional scroll type compressor, the pressure relief valve 50 itself is treated as one of the completed parts, and a process of assembling the compressor with the housing 10 is provided. Usually, after the housing 10 is assembled, the pressure relief valve 50 is attached to the end plate portion 101a of the rear housing 101. Therefore, a gap between the housing 10 and the pressure relief valve 50 is sealed by the O-ring 57.

[0024]

However, in the conventional scroll type compressor, the pressure relief valve 50 itself is treated as one of the finished parts. Since the relief valve 50 is attached to the housing 10, there is a problem that it cannot be inexpensive.

Usually, the pressure relief valve 50 is attached to the end plate portion 101a of the rear housing 101 after the housing 10 is assembled.
The gap between the housing 10 and the pressure relief valve 50 must be sealed by an O-ring 57, which also contributes to an increase in the number of steps.

Further, since the pressure relief valve 50 and the end plate portion 101a of the rear housing 101 are fixed by screw connection, male and female screws are formed in the first cylindrical portion 51b and the mounting hole 101d of the valve mounting portion 101c. In addition, since a nut-shaped portion is formed in the second cylindrical portion 51c, there is a problem that the processing is troublesome.

Further, since the second cylindrical portion 51c protrudes largely outside the end plate portion 101a of the rear housing 101, the space is restricted when the compressor is mounted at a limited predetermined position of the vehicle, for example. Problem.

Further, the pressure relief valve 50
Is a valve outer member 5 for incorporating a valve functional part.
1 and the need for the O-ring 57 for sealing, there is a problem that the number of parts increases.

It is therefore an object of the present invention to provide a scroll compressor in which the amount of protrusion of the pressure relief valve can be reduced and the overall shape can be reduced.

Another object of the present invention is to provide a scroll type compressor which can reduce the number of parts forming the pressure relief valve, and is excellent in assemblability and economy.

Still another object of the present invention is to provide a scroll compressor capable of improving the sealing performance of a portion where a pressure relief valve is mounted.

[0032]

According to the present invention, there is provided a housing including a housing, a fixed scroll fixed to the housing in the housing, and a movable scroll revolving by driving a shaft in the housing. The fixed scroll has a fixed end plate facing the end plate of the housing, and a spiral body provided on the end plate, and the movable scroll faces the fixed end plate. A movable end plate portion, and a spiral provided on the movable end plate, wherein the pair of spirals are engaged with each other at an angle in the housing, and the inside of the housing is In the axial direction of the shaft, the fixed-side end plate portion serves as a discharge chamber surrounded by the end plate portion of the housing and the fixed-side end plate portion, and a suction chamber formed on the movable scroll side. The revolving motion is given relative to the scroll of the movable scroll to reduce the volume on the suction chamber side while moving the closed space formed between the pair of scrolls toward the center. In a scroll compressor that discharges a compressed fluid from a central portion to the discharge chamber side, an end plate portion of the housing discharges a discharge gas to the outside of the housing when the discharge chamber has a predetermined pressure or higher. A pressure relief valve mechanism, the pressure relief valve mechanism includes a housing formed in an end plate of the housing, a gas introduction passage communicating from the housing to the discharge chamber, A gas blow-out hole communicating with the outside, and a valve component incorporated in the housing portion, wherein the valve component moves to open and close the gas introduction passage. A scroll type having a member, a shuttle valve member that holds the seal member and moves together with the seal member, and a spring that urges the shuttle valve member toward the gas introduction path. A compressor is obtained.

Further, according to the present invention, there is provided a housing, a fixed scroll fixed to the housing within the housing, and a movable scroll which revolves by driving a shaft in the housing, wherein the fixed scroll includes a housing. A movable end facing the fixed end plate portion, the movable scroll having a fixed end plate portion facing the end plate portion, and a scroll provided on the end plate portion. A plate portion and a spiral body provided on the end plate portion, wherein the pair of spiral bodies are engaged with each other at an angle in the housing, and the inside of the housing is the fixed side in the axial direction of the shaft. A discharge chamber surrounded by the end plate portion and the fixed-side end plate portion of the housing and a suction chamber formed on the movable scroll side. The revolving motion is given relative to the scroll scroll, and while the closed space formed between the pair of scrolls is moved in the center direction, the volume is reduced on the suction chamber side to compress the compressed fluid from the center. In the scroll compressor that discharges to the discharge chamber side, the fixed-side end plate has a pressure relief valve mechanism that discharges discharge gas to the outside of the housing when the pressure of the discharge chamber becomes a predetermined pressure or more. The pressure relief valve mechanism includes a housing formed in the fixed-side end plate, a gas introduction passage communicating from the housing to the discharge chamber, and a gas communicating from the housing to the outside of the housing. A valve member having a blow-out hole and a valve component incorporated in the housing portion, the valve component holding a seal member that moves to open and close the gas introduction path, and holds the seal member A shuttle valve member which moves together with the sealing member Te, scroll compressor, characterized in that a spring which biases the shuttle valve member to the gas introducing path side is obtained.

[0034]

In the scroll compressor according to the present invention, when the shuttle valve member and the seal member move when the pressure in the discharge chamber becomes equal to or higher than a predetermined pressure, the spring is compressed,
When the space between the lid member and the seal member is opened, the discharge gas (refrigerant gas) passes through the gap between the inner wall surface of the mounting hole and the outer peripheral surface of the shuttle valve member, and blows the refrigerant gas out of the rear housing. The processing of the mounting hole and the wall of the housing is performed collectively when the housing is processed.
Further, since the processing of the wall and the blowout hole is performed when the housing is processed, the processing accompanying the formation of the wall and the blowout hole is also performed at the same time as the processing of the housing.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a scroll type compressor according to the present invention will be described with reference to the drawings. Since the scroll compressor has substantially the same configuration as the conventional scroll compressor except for the portion constituting the pressure relief valve described with reference to FIG. 10 to FIG. The description of the same components will be omitted.

Referring to FIGS. 1 to 3, fixed scroll 16 has legs 16c (see FIG. 2) formed on the other surface of end plate 16a, similarly to the configuration shown in FIG. The housing 101 is fixed to the rear housing 101 by bolts 17 in a state of contacting the end plate portion 101a.

Further, the end plate portion 16 of the fixed scroll 16
a, the end plate 1 of the rear housing 101 in the discharge chamber 19;
A protruding portion 16f protruding toward 01a is formed. On the end plate portion 101a of the rear housing 101, a valve mounting portion 101f protruding from the inner wall surface of the end plate portion 101a toward the end plate portion 16a of the fixed scroll 16 is formed.

An accommodating portion 101g penetrating in parallel with the axial direction of the axis X is formed in the valve mounting portion 101f. The housing portion 101g penetrates from the discharge chamber 19 side to the outside of the end plate portion 101a of the rear housing 101, and the housing portion 101g communicates with an opening on the other end side of the protruding portion 16f. A valve function component is incorporated in the housing 101g.

Projecting portion 16f and valve mounting portion 101f
Have their respective end surfaces in contact with each other. Projection 1
6f, a communication hole 16g formed in a radial direction with respect to the axis X and further in parallel with the axis direction of the axis X,
A flow path is formed by 01g. The communication hole 16g has an opening at one end on a part of the peripheral surface of the protrusion 16f, and has an opening at the other end in contact with the distal end surface of the valve mounting portion 101f.

As shown in FIG. 3, the valve functional parts are as follows.
A lid member 40 formed in a plate shape from the tip end side of the valve mounting portion 101f, a seal member 53 that comes into contact with the lid member 40 and slightly moves in the axial direction, and a seal that holds the seal member 53 and seals the same. A shuttle valve member 54 that slightly moves in the axial direction together with the member 53;
101m slightly protruding radially from the inner wall surface
And a spring 56 interposed between the shuttle valve member 54 and the wall 101m. Here, a pressure relief valve mechanism is configured by the valve mounting portion 101f and the valve functional component.

Note that a blowout hole 101n is formed in the center of the wall 101m. The wall portion 101m serves to urge the spring 56 and the shuttle valve member 54 toward the lid member 40. The characteristics of the valve are spring 56
Is determined by the urging force and the diameter of the blowout hole 101n of the wall 101m. However, since the processing of the wall 101m and the blowout hole 101n is performed when the housing 10 is processed, the processing management accompanying the formation of the wall 101m and the blowout hole 101n is performed. Are collectively performed in the processing of the housing 10.

The lid member 40 has a small hole 40 in the center.
a, and a tapered portion 40b is formed on the opposite side of the plate surface following the hole 40a. The sealing member 53
The tapered portion 4 of the lid member 40 is made of a rubber material.
A surface facing the periphery of Ob is an annular groove 53a. The lid member 40 is fixed to a fixing groove 101p formed on the distal end surface of the valve mounting portion 101f and larger in the radial direction than the housing portion 101g. On one end surface of the shuttle valve member 54, a fitting groove 54a for fitting the seal member 53 is formed, and the seal member 53 is pressed into the fitting groove 54a.

To attach the valve function component to the housing 101g, first insert the spring 56 until it hits the wall 101m, and then insert the shuttle valve member 54 and the seal member 53 into the housing 101g. When the lid member 40 is fixed to the fixing groove 101p, the assembly is completed.

In the above-described pressure relief valve mechanism, when the pressure in the discharge chamber 19 becomes equal to or higher than the predetermined pressure, the shuttle valve member 54 and the seal member 53 are connected to the wall 10.
When the spring 56 is moved in the direction of 1 m, the spring 56 is compressed, and when the space between the lid member 40 and the seal member 54 is opened, the gap between the inner wall surface of the housing portion 101g and the outer circumferential surface of the shuttle valve member 54 is discharged. (Gas), and the refrigerant gas can be blown out of the rear housing 101a from the blowout hole 101n.

FIG. 4 shows a second embodiment of the pressure relief valve mechanism. Note that the second embodiment shows a modification of the pressure relief valve mechanism of the first embodiment. Therefore, the same parts as those in FIG. 1 and FIG.

Referring to FIG. 4, a housing portion 1 penetrating in parallel with the axial direction of axis X is provided in valve mounting portion 101f.
01 g are formed. The accommodation portion 101g penetrates from the discharge chamber 19 side shown in FIG. 1 to the outside of the bottom plate 101a, and the accommodation portion 101g communicates with the opening at the other end of the protruding portion 16f shown in FIG. The diameter of the housing portion 101g is slightly larger on the other end side of the protruding portion 16f than on the discharge chamber 19 side.

The distal end surface of the valve mounting portion 101f has a wall 10 protruding in the radial direction so as to close the housing 101g.
1r is formed. In the central part of the wall 101m,
A small diameter gas introduction hole 101s for introducing a discharge gas (refrigerant gas) is formed.
Following 1s, a tapered portion 101t is formed on the opposite side of the plate surface.

As shown in FIG. 3, the housing portion 101g includes a sealing member 53, a shuttle valve member 54, a lid member 60 fixed to the valve mounting portion 101f, and a shuttle valve member as valve function parts. 54 and a spring 56 interposed between the lid member 60. A blowout hole 60 a is formed in a central portion of the lid member 60. Here, a pressure relief valve mechanism is configured by the valve mounting portion 101f and the valve functional component.

The lid member 60 is fixed to a fixing groove 101v formed at the other end of the 101g. Housing 1
01g and the blowout hole 101n are processed in the housing 1
Since machining is performed when machining 0, machining management is performed collectively in machining the housing 10.

In order to incorporate the valve function component into the housing 101g, first, insert the shuttle valve member 54 and the seal member 53 until the seal member 53 abuts against the wall 101r, and insert the spring 56 into the housing 101g. When the lid member 60 is fixed to the fixing groove 101v, the assembly is completed.

In the above-described pressure relief valve mechanism, when the pressure in the discharge chamber 19 exceeds a predetermined pressure, the shuttle valve member 54 and the seal
When moving in the direction of 1r, the spring 56 is compressed, and when the space between the wall portion 101r and the seal member 54 is opened, the gap between the inner wall surface of the housing portion 101g and the outer circumferential surface of the shuttle valve member 54 is discharged. (Gas), and the refrigerant gas can be blown out of the rear housing 101a from the blowout hole 60a.

In the first and second embodiments,
The valve mounting part 101f is formed so that the valve function component is built in the housing part 101g. As a third embodiment, as shown in FIG. 5, an end plate part 101a is provided.
It is also possible to incorporate a valve function component within the thickness dimension of.

In the first embodiment, the lid member 4
0 on the distal end surface of the valve mounting portion 101f and the housing portion 101
g, a fixing groove 101 formed in a radial direction larger than g.
Although it is fixed to p, the lid member 40 can be omitted.

FIGS. 6 and 7 show a fourth embodiment of the pressure relief valve mechanism in the scroll compressor according to the present invention. Note that the fourth embodiment shows a modification of the pressure relief valve mechanism of the first embodiment. Therefore, FIGS. 1 and 2
The same parts as those described above are denoted by the same reference numerals, and description thereof will be omitted except for the main parts of the present invention.

Referring to FIG. 6 and FIG. 7, in the fourth embodiment, a valve function component is built in a protruding portion (valve mounting portion) 16f of the fixed end plate portion 16a.
The protruding portion 16f is formed with a bottomed housing portion 116g that is long in the radial direction from a part of the peripheral surface of the protruding portion 16f.
The housing portion 11g is provided as a valve function component in the housing portion 116g.
6g, a cover member 40 fixed to the opening edge portion, a seal member 53 abutting on the cover member 40 and slightly moving in the axial direction, and a seal member 53 holding the seal member 53 and holding the seal member 53.
A shuttle valve member 54 that moves slightly in the axial direction with the shaft member, and a spring 56 interposed between the shuttle valve member 54 and the inner bottom surface of the housing 116g are incorporated. Here, a pressure relief valve mechanism is configured by the protrusion 16f and the valve function component. The lid member 40 is fixed to a fixing groove 101k formed in a radial direction larger than the housing portion 116g.

The housing portion 116g is formed to be long in the direction intersecting with the shaft 11, and the valve component is accommodated in the protruding portion 16f in the direction intersecting with the shaft 11.

A communicating hole 16s is formed in the protruding portion 16f in parallel with the axis X. Communication hole 16g
Has an opening on one end side at the tip end surface of the protruding portion 16f and penetrates into the housing portion 116g. An additional communication hole 101 penetrating through the protruding portion 101f in parallel with the axial direction of the axis X.
z is formed. The housing 116g communicates with an opening at the other end of the protrusion 16f. In addition, the accommodation part 116g,
A passage is constituted by the communication hole 16g and the additional communication hole 101z. Note that the valve function component is the same component as in the first embodiment, and a description thereof will be omitted.

In order to incorporate the valve function component into the housing portion 101g, first, the spring 56 is inserted until it hits the inner bottom surface of the housing portion 116g.
4 and the sealing member 53 are inserted into the accommodation portion 101g, and finally, the lid member 40 is fixed to the fixing groove 101k, whereby the assembly is completed.

In the above-described pressure relief valve mechanism, when the pressure in the discharge chamber 19 becomes equal to or higher than a predetermined pressure, the shuttle valve member 54 and the seal member 53 are connected to the housing 1.
When moving in the direction of 16 g, the spring 56 is compressed,
The space between the lid member 40 and the seal member 54 is opened. Then, the inner wall surface of the housing portion 116g and the shuttle valve member 54
The discharge gas (refrigerant gas) passes through the gap between the
The refrigerant gas can be blown out of the rear housing 101a from the communication hole 16s and the additional communication hole 101z.

Although the characteristics of the valve are determined by the diameter of the spring 56 and the diameter of the communication hole 16s, the communication hole 16s is formed when the housing 10 is machined.
The processing management accompanying the formation of s is integrated into the processing of the housing 10.

FIG. 8 shows a fifth embodiment of the pressure relief valve mechanism in the scroll compressor according to the present invention. Note that the fifth embodiment shows a modification of the pressure relief valve mechanism of the fourth embodiment.

In the pressure relief valve mechanism according to the fifth embodiment, a housing 116g is formed in the protruding portion 16f so as to have a long dimension parallel to the axial direction of the axis X, and a valve mechanism component is housed in the housing 116g. Have been. The housing 116g, the communication hole 16g, and the additional communication hole 10
1z forms a flow path.

FIG. 9 shows a sixth embodiment of the pressure relief valve mechanism in the scroll compressor according to the present invention. Note that the sixth embodiment shows a modification of the pressure relief valve mechanism of the fifth embodiment.

In the sixth embodiment, the lid member 40 is fixed to the fixing groove 101p formed on the distal end surface of the projection 16f and larger in the radial direction than the housing 101g.

[0065]

As described above, according to the scroll compressor of the present invention, a space for incorporating the pressure relief valve mechanism is secured in either the end plate of the housing or the end plate of the fixed scroll. Therefore, the entire compressor can be made smaller than before without the pressure relief valve mechanism protruding largely out of the housing, and the surrounding space can be used effectively.

Further, since the number of parts constituting the pressure relief valve mechanism can be reduced as compared with the conventional compressor, the number of parts can be reduced and a scroll type compressor excellent in assemblability can be provided.

Further, since the housing containing the pressure relief valve mechanism can be collectively formed when processing the housing, it is possible to provide a scroll compressor which is easy to process and excellent in economy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a scroll compressor according to the present invention.

FIG. 2 is an enlarged longitudinal sectional view showing a part of a housing incorporating the pressure relief valve mechanism shown in FIG.

FIG. 3 is a perspective view showing a component configuration of the pressure relief valve mechanism shown in FIG.

FIG. 4 is a longitudinal sectional view showing a pressure relief valve according to a second embodiment of the present invention, in which a part of a housing having a built-in mechanism is enlarged.

FIG. 5 is a longitudinal sectional view showing a third embodiment of the scroll compressor of the present invention, in which a pressure relief valve is partially enlarged in a housing having a built-in mechanism and a fixed scroll.

FIG. 6 is a longitudinal sectional view showing a fourth embodiment of the scroll compressor according to the present invention.

7 is an enlarged longitudinal sectional view showing a part of a pressure relief valve shown in FIG. 6, an end plate having a built-in mechanism, a housing, and a fixed scroll.

FIG. 8 is a longitudinal sectional view showing a fifth embodiment of the scroll compressor according to the present invention, in which a pressure relief valve is partially enlarged, showing an end plate having a built-in mechanism, a housing, and a part of a fixed scroll. is there.

FIG. 9 is a vertical sectional view showing a pressure relief valve according to a sixth embodiment of the present invention, in which a pressure relief valve is partially enlarged with an end plate having a built-in mechanism, a housing, and a part of a fixed scroll. is there.

FIG. 10 is a longitudinal sectional view showing a conventional scroll compressor.

11 is a side view of the pressure relief valve shown in FIG. 10 when viewed from the right side in FIG. 1;

12 is an enlarged longitudinal sectional view showing a part of a housing to which the pressure relief valve shown in FIG. 10 is attached.

FIG. 13 is an enlarged longitudinal sectional view of the pressure relief valve shown in FIG. 10;

[Explanation of symbols]

 Reference Signs List 10 housing 11 shaft 11a small-diameter cylindrical portion 11b large-diameter cylindrical portion 16 fixed scroll 16b, 20b, spiral body 16f projecting portion 18 suction chamber 18a suction hole 19 discharge chamber 20 movable scroll 40, 60 lid member 53 seal member 54 shuttle valve member 56 Spring 100 Front housing 101 Rear housing 101f Valve mounting portion 101g, 116g Storage portion 101m, 101r Wall portion 101n Blow-out hole 101s Gas introduction hole 101z Additional communication hole

Claims (10)

[Claims] 1. A housing comprising: a housing; a fixed scroll fixed to the housing in the housing; and a movable scroll revolving in the housing by driving a shaft in the housing, wherein the fixed scroll faces an end plate of the housing. A movable end plate portion facing the fixed end plate portion; and a movable end plate portion having a spiral body provided on the end plate portion. A pair of spirals provided in the end plate portion of the shaft, wherein the pair of spirals are engaged with each other at an angle in the housing, and the inside of the housing is the fixed-side end in the axial direction of the shaft. A plate section is partitioned into a discharge chamber surrounded by the end plate section and the fixed end plate section of the housing and a suction chamber formed on the movable scroll side,
The revolving motion is given to the spiral body of the orbiting scroll relatively, and the closed space formed between the pair of spiral bodies is moved toward the center while the volume is reduced on the suction chamber side and compressed from the center. In a scroll compressor that discharges fluid to the discharge chamber side, an end plate portion of the housing has a pressure relief valve mechanism that discharges discharge gas to the outside of the housing when the discharge chamber has a predetermined pressure or higher. The pressure relief valve mechanism has a housing formed in an end plate portion of the housing, a gas introduction passage communicating from the housing to the discharge chamber, and communicating from the housing to the outside of the housing. A gas blow-out hole, and a valve component housed in the housing portion, wherein the valve component moves to open and close the gas introduction path; A scroll compressor comprising: a shuttle valve member that holds a scroll member and moves together with the seal member; and a spring that urges the shuttle valve member toward the gas introduction path. 2. The scroll compressor according to claim 1, wherein the end plate portion of the housing has a valve mounting portion protruding toward the discharge chamber, and the housing portion is provided with the axis in the valve mounting portion. Wherein the valve component is housed in the housing in the axial direction. 3. The scroll-type compressor according to claim 1, wherein the housing portion includes a wall portion having a through hole formed on one of the gas introduction path side and the gas blowout hole side, and the valve component. A scroll type compressor comprising: a lid member having a through hole provided on the other side of the gas introduction path side and the gas blowout hole side so as to be closed after being housed in the housing section. 4. The scroll-type compressor according to claim 1, wherein the fixed-side end plate has a valve mounting portion having a front end surface in contact with the housing portion. A scroll type compressor, wherein the valve mounting portion has a communication hole communicating between the housing portion and the discharge chamber, and the communication hole and the housing portion form a flow path of the discharge gas. 5. A housing comprising: a housing; a fixed scroll fixed to the housing in the housing; and a movable scroll revolving in the housing by driving a shaft in the housing, wherein the fixed scroll faces an end plate of the housing. A movable end plate portion facing the fixed end plate portion and a movable end plate portion having a spiral body provided on the end plate portion. And a pair of spiral bodies provided in the housing, wherein the pair of spiral bodies are engaged with each other at an angle in the housing, and the inside of the housing is formed by the fixed side end plate in the axial direction of the shaft. A discharge chamber surrounded by the end plate portion and the fixed end plate portion of the housing and a suction chamber formed on the movable scroll side are partitioned, and a spiral body of the movable scroll is formed. Giving the relative orbital motion, the closed space formed between the pair of spiral bodies is moved toward the center while reducing the volume at the suction chamber side to discharge the compressed fluid from the center to the discharge chamber side. In the scroll type compressor, the fixed-side end plate portion has a pressure relief valve mechanism that discharges discharge gas to the outside of the housing when the discharge chamber has a predetermined pressure or higher. A valve mechanism, a housing portion formed in the fixed-side end plate portion, a gas introduction passage communicating from the housing portion to the discharge chamber, a gas blowing hole communicating from the housing portion to the outside of the housing, A valve component built in the housing portion, the valve component moving to open and close the gas introduction path, and the seal member holding the seal member and A scroll type compressor comprising: a shuttle valve member that moves to the main part; and a spring that urges the shuttle valve member toward the gas introduction path. 6. The scroll compressor according to claim 5, wherein the fixed end plate has a valve mounting portion projecting toward the discharge chamber, and the valve mounting portion includes the housing portion. A scroll compressor formed in an axial direction, wherein the valve component is accommodated in the axial direction in the valve mounting portion. 7. The scroll compressor according to claim 5, wherein the fixed-side end plate has a valve mounting portion projecting toward the discharge chamber, and the valve mounting portion includes the housing portion. A scroll type compressor formed in a direction crossing a shaft, wherein the valve component is housed in the valve mounting portion in a direction crossing the shaft. 8. The scroll type compressor according to claim 5, wherein said housing portion has a through-hole so as to be closed after said valve component is housed in said housing portion. A scroll compressor comprising: 9. The scroll-type compressor according to claim 5, wherein the fixed-side end plate has a valve mounting portion having a front end surface in contact with an end plate of the housing. Wherein the valve mounting portion has a communication hole communicating between the housing portion and the discharge chamber, and the communication hole and the housing portion form a flow path of the discharge gas, wherein the scroll-type compression is provided. Machine. 10. The scroll compressor according to claim 5, wherein the end plate of the housing has an additional communication hole communicating with the housing. Type compressor.