JPH07103156A - Scroll compressor - Google Patents

Abstract

PURPOSE:To rationalize the suction of gas in eliminating any go-round motion of gas from a suction side hole to the backside of an end plate by closing an outer opening of this end plate in the suction side hole, in a scroll compressor where the suction side hole is installed in the end plate of a driven side scroll. CONSTITUTION:A motor driving element 2 and a scroll compressing element 3 are housed in a hermetically sealed vessel 1. By the way, this scroll compressing element 3 consists of two scrolls 4 and 5 at both driving and driven sides, and these scrolls are supported by both main and auxiliary frames 6 and 7. In addition, an axial movement of this driven side scroll 5 is regulated by a regulating member 8. Further both these scrolls 4 and 5 are rotated in the same direction by an Oldham's coupling 9. In succession, a suction side hole 23 to be interconnected to an inlet port 24 is installed in an end plate 13 of the driven side scroll 5. In this case, thickness of this end plate 13 is increased, and a partition part 30 is left behind in an interval between the suction side hole 23 and a step part 27, while a closing plug 31 is fitted in an outer opening end of the suction side hole 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor for rotating both scrolls in the same direction for compression.

[0002]

2. Description of the Related Art A scroll compressor accommodates an electric element and a scroll compression element in a hermetic container, and the scroll compression element has a plurality of elements obtained by meshing a driving scroll and a driven scroll. There is a configuration in which gas is sent to the compression space and compressed by the rotation of both scrolls to be sent out as high-pressure gas from the compression space having a reduced volume.

As shown in FIG. 3, reference numeral 1 designates a closed container in which an electric element 2 and a scroll compression element 3 are housed. The scroll compression element 3 includes a first scroll 4 on the driving side, a second scroll 5 on the driven side, a main frame 6 that supports the first scroll 4, an auxiliary frame 7 that supports the second scroll 5, A restricting member 8 fixed to the first scroll 4 for restricting the axial movement of the second scroll 4, and an Oldham coupling 9 for rotating the first scroll 4 and the second scroll 5 in the same direction. Is equipped with.

The first scroll 4 is provided with a spiral wrap 11 on the lower surface of the end plate 10, and a drive shaft 12 pivotally supported by the main frame 6 from the upper surface of the end plate 10.
Stands up and is connected to the electric element 2. Second
The scroll 5 is provided with a spiral wrap 14 that meshes with the wrap 11 on the upper surface of the mirror plate 13, and a driven shaft 15 eccentric to the drive shaft 12 and pivotally supported by the auxiliary frame 7 from the lower surface of the mirror plate 13. It extends downward.

The above scrolls 4 and 5 are engaged with each other in a hollow chamber 16 composed of a main frame 6 and an auxiliary frame 7. Then, of the scrolls in which the wraps 11 and 14 are engaged with each other, as shown in the drawing, the regulating member 8 arranged on the back side of the end plate 13 of the second scroll 5 is fixed to the first scroll 4, and The second scroll 5 is prevented from moving in the axial direction.
The Oldham's joint 9 is arranged between the end plate 13 and the regulating member 8. The Oldham's joint 9 allows the plurality of compression spaces 17 formed by the wraps 11 and 14 to engage with each other from the outside to the inside. The scrolls 4 and 5 are rotated in the same direction while gradually reducing and compressing.

A suction port 1 is provided on the lower side of the closed container 1.
8, the discharge port 19 is arranged on the upper side, and the gas (refrigerant) that has entered from the suction port 18 is sent from the second scroll 5 side to the outer compression space 17, and the central side of this compression space 17 The pressure is increased due to the shift to and reduction in the pressure, the gas is sent out above the closed container 1 through the first scroll 4 side, and is discharged from the discharge port 19 to the outside of the container.

As described above, the scrolls 4 and 5 are formed with passages for passing gas. In the first scroll 4, a gas passage 20 penetrates through the drive shaft 12 in the longitudinal direction thereof, and a check valve 21 is arranged on the upper end side thereof. In the second scroll 5, the driven shaft 1
5, a gas passage 22 is provided with the lower end opened, and a suction lateral hole 23 is provided from the outer peripheral end of the end plate 13 to communicate with the gas passage 22. The suction port 24, which is open at the upper outer peripheral side, communicates. Further, an empty chamber 25 is located below the driven shaft 15, and an intake port 18 is connected to the empty chamber 25. As a result, the intake port 18, the empty chamber 25, the gas passage 22, and the suction lateral hole 2 are provided.
3, the gas is supplied to the compression space 17 through the suction port 24.

As described above, an Oldham coupling is provided to rotate both scrolls, whose rotation centers are eccentric, in the same direction so as to reduce the compression space. The transmission of rotational force using this Oldham coupling is performed. To configure
As shown in the figure, a step portion 27 for accommodating the annular portion 26 of the Oldham coupling 9 so as to be movable in a plane is formed over the outer periphery of the rear surface of the end plate 13 and has an annular shape. Slide grooves 29 for slidably (radially) accommodating the claws 28 projecting upward and downward from the required portions of the portion 26 are provided at the corresponding portions of the end plate 13 and the regulating member 8.

[0009]

The position of the Oldham's joint is not set only between the end plate of the second scroll and the regulating member below it as described above, but rather the first scroll and the second scroll. It may be set between the end plates so as to directly connect the scroll. In this way, the position of the Oldham coupling differs between the case where the drive scroll and the driven scroll are directly connected to each other on the outer circumference of the wrap and the case where the driven scroll is indirectly connected via the restriction member. In the former case, the shape of the end plate is not restricted, but the outer radius of the wrap is restricted.

Therefore, the above-described structure is the latter with a restricting member interposed, and a degree of freedom is obtained in the outer radius of the wrap. However, a step is formed on the outer peripheral edge of the rear surface of the end plate 13 to form a motion space for the Oldham coupling. Therefore, as described above, the step portion 2 is formed on the outer peripheral edge of the rear surface of the end plate 13.
7 is located.

Then, as shown in FIG.
7 and the suction lateral hole 23 overlap, and the suction lateral hole 23 cannot be opened only at the suction port 24, and the suction lateral hole 23 is opened to the back space of the end plate 13 and the supplied gas and oil are There is a problem that the compressed space cannot be efficiently guided.

In view of the above-mentioned circumstances, the present invention has an object to prevent gas from sneaking into the rear side of the end plate from the suction lateral hole, and the gas is properly sent out from the suction lateral hole to the suction port on the upper surface of the end plate. The purpose is to do so.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and accommodates an electric element and a scroll compression element, and the scroll compression element is provided upright with a spiral wrap on an end plate. And a first scroll having a shaft connected to the electric element, and a spiral wrap having a shaft eccentric to the center of the shaft of the first scroll and facing and engaging with the first scroll. A second scroll vertically installed, a main frame that axially supports the shaft of the first scroll, an auxiliary frame that axially supports the shaft of the second scroll, and a hollow formed by the auxiliary frame and the main frame. Of the first scroll and the second scroll housed in the room, the first scroll is fixed to the first scroll and is located on the back side of the end plate of the second scroll, so that the second scroll can be moved in the axial direction. Regulation And a second scroll, which is positioned between the restriction member and the end plate of the second scroll and configured to include an Oldham coupling that rotates the first scroll and the second scroll in the same direction. In the end plate of
In a scroll compressor provided with a suction lateral hole extending radially from the outer peripheral end of the end plate and communicating with a suction port on the end plate, an opening on the outer peripheral end side of the end plate of the suction lateral hole is closed. A scroll compressor is provided to solve the above problems.

[0014]

In the present invention, since the opening on the outer peripheral end side of the suction horizontal hole provided in the end plate of the second scroll is closed, the suction horizontal hole is separated from the space on the outer side or the back side of the end plate. The gas passing through the suction lateral holes does not enter the space on the outer side or the back side of the end plate.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. The same parts as those of the conventional example shown in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 shows a first embodiment. In this embodiment, the thickness of the end plate 13 is slightly increased, and the partition 30 is left between the suction lateral hole 23 and the step 27 so that the suction lateral hole 23 and the step 27 do not overlap each other. A closing plug 31 is fitted to the open end of the suction lateral hole 23 on the outer peripheral side of the end plate, and the partition 3
0 and the closing plug 31 close the outer peripheral side opening of the suction lateral hole 23.

Since the suction lateral hole 23 does not overlap the stepped portion 27 in this manner, the gas passing through the suction lateral hole 23 is directly delivered to the suction port 24.

In the above-mentioned embodiment, the thickness of the end plate 13 of the second scroll 5 is slightly increased. However, the increase in the end plate thickness increases the overturning moment and the end seal at the upper end of the lap is poor. Could be.

In such a case, the structure shown in FIG. 2 can be used. FIG. 2 shows a second embodiment in which a step portion 27 corresponding to the annular portion 26 of the Oldham coupling 9 is provided on the upper surface of the regulating member 8. Then, the annular portion 26 is arranged on the step portion 27 provided on the regulating member 8 so that the upper surface of the regulating member 8 and the upper surface of the annular portion 26 are flush with each other.

On the other hand, the suction lateral hole 23 has no portion that overlaps with the step portion 27, the portion corresponding to the step portion 27 on the regulating member 8 side serves as the partition portion 30, and the open end has the closing plug 3
1 is installed. In the regulation member 8, the slide groove 29 for slidably accommodating the claw 28 of the Oldham coupling 9 is located further below the stepped portion 27, which increases the thickness of the regulation member 8. However, this does not increase the overturning moment of the second scroll 5.

By doing so, similarly to the above-described embodiment, the opening on the outer peripheral end side of the suction lateral hole 23 is closed so that the suction lateral hole 23 does not overlap the step portion 27 and the gas passing through the suction lateral hole 23 is directly Suction port 24
Will be sent to.

[0022]

The present invention is based on the configuration described above. By closing the opening on the outer peripheral end side of the suction lateral hole in this way, the suction lateral hole and the stepped portion do not overlap with each other, and the gas and oil passing through the suction lateral hole are properly delivered to the suction port and enter the compression space. As described above, it has an extremely excellent practical effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a scroll compressor according to the present invention.

FIG. 2 is an explanatory diagram showing another embodiment.

FIG. 3 is an explanatory diagram showing a conventional example.

[Explanation of Codes] 1 ... Airtight container 4 ... First scroll 5 ... Second scroll 8 ... Restricting member 9 ... Oldham coupling 10, 13 ... End plate 11, 14 ... Wrap 20, 22 ... Gas passage 23 ... Suction lateral hole 24 ... Suction port 26 ... Annular shaped portion 27 ... Step portion 28 ... Claw 29 ... Slide groove 30 ... Partition portion 31 ... Closing plug

Claims (2)

[Claims] 1. A first scroll having an electric element and a scroll compression element, the scroll compression element having a shaft connected to the electric element by a spiral wrap standing on a mirror plate, and the first scroll. It has an axis that is eccentric with the center of the scroll axis of 1.
A second scroll in which a spiral wrap that faces each other with respect to the first scroll is erected on the end plate, a main frame that pivotally supports the shaft of the first scroll, and a shaft that supports the shaft of the second scroll. Of the first scroll and the second scroll accommodated in the hollow chamber formed by the auxiliary frame and the main frame, the back surface of the end plate of the second scroll fixed to the first scroll. Located between the first scroll and the second scroll, and a regulation member that regulates the movement of the second scroll in the axial direction, and a first scroll and a second scroll that are located between the regulation member and the end plate of the second scroll. And an Oldham coupling that rotates in the same direction, and a suction lateral hole is provided in the end plate of the second scroll, the suction lateral hole extending radially from the outer peripheral end of the end plate and communicating with the suction port on the end plate. In roll compactor, scroll compressor, characterized in that closes the opening of the end plate outer peripheral end of the said suction lateral hole. 2. A step portion corresponding to the annular portion of the Oldham coupling is provided in the regulating member, and the annular portion of the Oldham joint is arranged in the groove portion of the regulating member so that the upper surface of the regulating member and the Oldham joint are 2. The upper surface of the annular portion is flush with the upper surface of the annular portion.
Scroll compressor described in.