JPH04279783A - Scroll compressor - Google Patents

Abstract

PURPOSE:To guide refrigerant to an inlet port provided for a regulating member which is rotating monolithically with a first scroll by means of a refrigerant guide member. CONSTITUTION:A refrigerant guide member 41 fitted onto the lower periphery of a regulating member 24 is formed into a tapered shape in such a way that its opening section 42 is smaller than that of an installation section 43. And the refrigerant guide member is mounted therein, so that the opening section 42 is coaxial with a drive shaft 17. The opening section 42 is rotated over the same orbit, so that refrigerant which comes in to a hollow chamber 11 from a suction pipe 44, is apt to flow in the inside of the refrigerant guide member 41.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a scroll compressor that performs compression by rotating both scrolls in the same direction.

0002

2. Description of the Related Art A conventional scroll compressor is constructed as shown in, for example, Japanese Patent Publication No. 1-35196. Here, a conventional example will be explained with reference to this publication. In FIG. 4, the conventional example shown in this figure includes a housing 50, a discharge chamber 51, a first scroll 52 which is a driving scroll housed inside the housing 50, and a second scroll which is a driven scroll. 53,
A rotating shaft 54 that is a driving shaft integrated with the first scroll 52
, a rotating shaft 5 that is a driven shaft integrated with the second scroll 53
5. The first scroll 5 is driven by the electric motor 56 and the sliding ring 57, which are the driving sources for the first and second scrolls 52 and 53.
2 end plate 58 and the first housing member 5 opposite thereto.
9, a sealed space 66 formed between the end plate 63 of the second scroll 53 and the inner wall 65 of the second housing 64 opposite thereto by the sliding ring 62, and a lubrication system. It is equipped with a road.

The housing 50 is constructed by combining first and second housing members 59 and 64, as shown in FIG. A gas suction port 67 is formed on the side of the second housing 64, and an end cover 70 having an oil supply hole 69 is attached to the end of the cylindrical portion 68.

As shown in FIG. 4, the discharge chamber 51 is connected to a first housing member 59, and a gas outlet 71 is formed in the side of the discharge chamber. An end cover 73 is attached to the end.

The first scroll 52 has an end plate 58 and a wrap 74. On the other hand, the second scroll 53 includes an end plate 63, a wrap 75, and a peripheral edge 7 provided on the end plate 63.
6. The end plate 58 of the first scroll 52 has a flange 77 provided on the peripheral edge 76 facing the outer edge. The second scroll 53 is provided with a compression space 78 inside a peripheral portion 76, and a gas inlet 78 is provided in the peripheral portion 76.
9 is provided. The wraps 74 and 75 are formed in a spiral shape consisting of an involute or a similar curve, and are interlocked with each other. The end plates 58 and 63 are provided with gas holes 80 and 81 for introducing gas pressure from the compression space 78 into the sealed spaces 61 and 66. moreover,
The end plate 58 of the first scroll 52 and the second scroll 5
An Oldham joint 82 is incorporated between the flange 77 of No. 3 and the second scroll 53 is driven in the same direction as the first scroll 52 is driven.
A second scroll 53 is drivingly connected to the scroll 52 so as not to rotate.

The rotating shaft 54 of the first scroll 52 and the second
The rotating shaft 55 of the scroll 53 is mounted with centers O and P eccentrically spaced apart from each other by a distance ε. A wrap 74 is provided on the end plate 58 side half of the rotating shaft 54 of the first scroll 52.
, 75 from the compression space 78 formed between the discharge chamber 5
A gas discharge port 83 communicating with 1 is provided. Further, the rotation shaft 54 of the first scroll 52 is supported by a bearing 84 provided in the boss portion of the first housing member 59 and a bearing 85 provided in the cylindrical portion 72 of the discharge chamber 51, and is It is designed to be able to rotate at a fixed position value and is directly connected to an electric motor 56.

[0007] In the scroll compressor of this structure, the first
The second scrolls 52 and 53 are rotated in the same direction to compress the refrigerant in the compression space 78, and the first and second scrolls 52 and 53 are rotated in the same direction.
The vibration during compression operation of No. 2,53 is reduced, allowing the scroll compressor to be used for high speed operation.

[0008]

However, in the conventional scroll compressor, the suction port 79 for introducing gas into the compression space 78 is provided at the peripheral edge 76 of the second scroll 53 rotating at high speed. Gas that has flowed into the housing 50 through the suction port 67 of the housing 64 of No. 2 becomes difficult to flow to the suction port 79, reducing the refrigerating ability, and furthermore, the space between the suction port 79 and the suction port 67 is insufficient. However, there were problems such as the scroll compressor becoming larger.

[0009] This invention solves the above problems.
The object of the present invention is to provide a scroll compressor in which a refrigerant guide member is provided around a suction port that supplies refrigerant to a compression space, and the refrigerant can be sucked even when the suction port rotates.

0010

[Means for Solving the Problems] This invention houses an electric element and a scroll compression element in a closed container, and connects the scroll compression element to the electric element by erecting a spiral wrap on an end plate. a first scroll having an axis;
having an axis eccentric to the center of the axis of the first scroll;
a second scroll having a spiral wrap erected on an end plate that faces and engages with the first scroll; a main frame having a main bearing that pivotally supports the shaft of the first scroll; A plurality of compressed spaces formed by an auxiliary frame having an auxiliary bearing that pivotally supports the shaft of the scroll, and a first scroll and a second scroll housed in a hollow chamber formed inside the auxiliary frame and the main frame. and an Oldham joint that rotates and swings these scrolls in the same direction so that the scrolls are gradually contracted from the outside to the inside to perform compression, and the scroll part in the hollow chamber is configured to have suction into the hollow chamber. In a scroll compressor provided with an inlet for introducing refrigerant flowing from a pipe into a compression space, the scroll portion in the hollow chamber of the scroll compression element has an opening concentric with the other shaft around one axis, and A refrigerant guide member is attached to cover the suction port provided in the scroll part.

[0011]Furthermore, the present invention has an opening in the scroll portion in the hollow chamber of the scroll compression element around one shaft and concentric with the other shaft, and a refrigerant guide member that covers the suction port provided in the scroll portion. The refrigerant guide member is mounted to face the opening of the suction pipe.

0012

[Operation] This invention is configured as described above, so that
The opening of the refrigerant guide member attached to the scroll part so as to cover the rotating suction port rotates on the same orbit,
The refrigerant flowing into the hollow chamber from the suction pipe is guided to the suction port via the refrigerant guide member.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on the embodiments shown in FIGS. 1 to 3.

Reference numeral 1 denotes a closed container, in which an electric element 2 is housed on the upper side, and a scroll compression element 3 is housed on the lower side. The electric element 2 is composed of a stator 4 and a rotor 5 disposed inside the stator. An air gap 6 is formed between the stator 4 and the rotor 5.

Reference numeral 7 denotes a main frame, and a main bearing 8 is provided at the center of this frame. Reference numeral 9 denotes an auxiliary frame mounted in pressure contact with the inner wall of the closed container 1, and this auxiliary frame has a main bearing 8 of the main frame 7 and an eccentric auxiliary bearing 10.
is provided. The main frame 7 and the auxiliary frame 9 are fixed with bolts 12 so as to form a hollow chamber 11 inside.

The scroll compression element 3 is composed of a first scroll 13 driven by the electric element 2 and a second scroll 14 rotated in the same direction as the first scroll. The first scroll 13 includes a disk-shaped end plate 15 , a spiral wrap 16 made of an involute curved line erected on one side of the end plate, and a spiral wrap 16 formed of an involute-shaped curved line erected on one side of the end plate 15 .
The drive shaft 17 is inserted into and fixed to the rotor 5 so as to protrude from the center of the other surface of the rotor 5 . The first scroll 13 constitutes a driving scroll. Second
The scroll 14 includes a disk-shaped end plate 18, a spiral wrap 19 made of an involute curved line erected on one side of the end plate, and a driven shaft protruding from the center of the other side of the end plate 18. It consists of 20. And the second
The scroll 14 constitutes a driven scroll.

The first scroll 13 has a drive shaft 17 supported by the main bearing 8 of the main frame 7, and the second scroll 14
The driven shaft 20 is pivotally supported by the auxiliary bearing 10 of the auxiliary frame 9, and the wraps 16 and 19 of both scrolls 13 and 14 face each other in the hollow chamber 11 and engage with each other to form a plurality of compression spaces 21 inside. I'm trying to form it.

The drive shaft 17 is provided with a discharge hole 23 for discharging the refrigerant compressed in the compression space 21 into the space 22 between the electric element 2 and the scroll compression element 3 in the closed container 1.

Reference numeral 24 denotes a regulating member for regulating the movement of the second scroll 14 in the axial direction, and this regulating member contacts the end plate 18 of the second scroll 14 and is fixed to the first scroll 13 with bolts 25. There is. The regulating member 24 is provided with a protruding annular wall 27 that holds a ball bearing 26 that contacts the outer periphery of the auxiliary bearing 10 . Reference numeral 28 denotes a plate that is attached to the lower part of the regulating member 24 and also serves to prevent the ball bearing 26 from coming off, and this plate forms a sealing surface that will be described later.

Reference numeral 29 denotes an Oldham joint provided between the first scroll 13 and the second scroll 14. The first key 3 is fitted into the first key groove 31 provided on the outer periphery of the mirror plate 15.
2, and a second key 34 that is fitted into a second key groove 33 provided on the outer periphery of the end plate of the second scroll 14. And the Oldham joint 29 has a key 32,
34 in the keyways 31 and 33, the first scroll 13 and the second scroll 14 are rotated in the same direction and oscillated relative to each other.

35 is the main frame 7 and the first scroll 1
A sealing material 36 is provided between the auxiliary frame 9 and the plate 28, and these sealing materials use the high pressure gas in the space 22 as back pressure.

37 is the driven shaft 20 of the second scroll 14
This eccentric bushing is provided between the auxiliary bearing 10 and the auxiliary bearing 10, and the eccentric bushing is formed by eccentrically forming an outer circumferential circle that fits into the auxiliary bearing 10 and an inner circumferential circle that fits the driven shaft 20. The eccentric bush 37 is provided with a protrusion 38 formed by a pin. Further, this protrusion is loosely inserted into a recess 39 provided in the auxiliary frame 9. The movement of the eccentric bush 37 in the rotational direction is restricted by inserting the protrusion 38 into the recess 39.

Reference numeral 40 denotes a suction port provided in the regulating member 24, and this suction port is provided downward to connect the compression space 21 and the hollow chamber 1.
It communicates with 1.

Reference numeral 41 designates the regulating member 2 so as to cover the suction port 40.
4 is an annular refrigerant guide member attached to the outer periphery of the lower part of the refrigerant guide member. ing. This opening forms a gap with the outer periphery of the annular wall 27 of the regulating member 24, and is formed concentrically with the center of the drive shaft 17.

44 is a suction pipe, and this suction pipe is connected to the hollow chamber 11.
It opens at the bottom inside. The opening of the suction pipe 44 faces the refrigerant guide member 41. 45 is a discharge pipe, and this discharge pipe is provided at the upper part of the closed container 1.

In the scroll compressor thus constructed, when the electric element 2 is rotated, its rotational force is transmitted to the first scroll 13 via the drive shaft 17. The rotational force transmitted to the first scroll is transmitted to the second scroll 14 via the Oldham joint 29, and the second scroll is rotated in the same direction as the first scroll 13 while being relatively oscillated. It's moving. And the first
The second scroll 14 rotates at a position eccentric to the center of the driven shaft 20 with respect to the center of the drive shaft 17 of the scroll 13. Therefore, the first scroll 13 and the second scroll 14 gradually reduce the compressed space 21 formed by these scrolls from the outside to the inside,
The refrigerant that flows into the hollow chamber 11 from the suction pipe 44 and flows into the suction port 40 from the opening 42 of the rotating refrigerant guide member 41 flows into the outer compression space 21 and is compressed. This compressed refrigerant is discharged into the space 22 from the discharge hole 23 provided in the drive shaft 17 of the first scroll 13, passes through the air gap 6 of the electric element 2, and is discharged from the discharge pipe 45 to the outside of the closed container 1. be done.

The eccentric bush 37 provided between the auxiliary bearing 10 and the driven shaft 20 is caused by the gas load acting within the compression space 21 and the frictional force caused by the rotation of the driven shaft 20 to cause the protrusion 3 to move.
8 and the recess 39 within a regulated range. Therefore, the eccentric bush 37 changes the amount of eccentricity of the second scroll 14 with respect to the first scroll 13, so that the wrap 19 of the second scroll becomes the wrap 1 of the first scroll 13.
6, move both scrolls 13, 14 in the direction of contacting them.
The wraps 16 and 19 are brought into contact with each other.

The opening 42 of the refrigerant guide member 41 provides a gap with the outer periphery of the annular wall 26 of the regulating member 24 and is formed concentrically with the center of the drive shaft 17, so that the rotation of the regulating member 24 causes the refrigerant guide member to close. 41 rotates on the same orbit, so that the refrigerant that has flowed into the hollow chamber 11 from the suction pipe 44 can easily flow into the refrigerant guide member 41. Furthermore, since the refrigerant guide member 41 is formed in a tapered shape so that the opening 42 is smaller than the mounting portion 43, the refrigerant flowing into the inside through the opening 42 swirls along the inner wall of the refrigerant guide member 41. This makes it easier for the refrigerant to flow into the suction port 40 provided on the outer periphery of the regulating member 24.

By providing the suction pipe 44 facing the refrigerant guide member 41 to which the mounting portion 43 is attached to the lower outer periphery of the regulating member 24, the rotation orbits of the outer peripheries of the first scroll 13 and the second scroll 14 are adjusted. It is brought close to the inner wall of the hollow chamber 11 formed by the main frame 7 and the auxiliary frame 9, so that the scroll compression element 3 can be miniaturized.

[0030]

As described above, according to the present invention, the scroll portion in the hollow chamber of the scroll compression element has an opening concentric with the other shaft around one shaft, and a suction hole provided in the scroll portion. Since the refrigerant guide member that covers the opening is attached, the opening of the refrigerant guide member rotates on the same orbit, making it easier for refrigerant to flow into this opening, allowing refrigerant to be supplied to the rotating suction port. This is how it was done. Moreover, by providing the refrigerant guide member opposite to the opening of the suction pipe, the refrigerant that has flowed into the hollow chamber directly flows into the opening, reducing the amount of refrigerant stagnant in the hollow chamber and improving the refrigerating capacity. It has been made possible to do so.

[Brief explanation of the drawing]

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

FIG. 2 is an enlarged sectional view of a main part of the scroll compression element of the present invention.

FIG. 3 is a sectional view showing a refrigerant guide member of the present invention.

FIG. 4 is a sectional view of a conventional scroll compressor.

[Explanation of symbols]

1　Airtight container 2　Electric element 3 Scroll compression element 7 Main frame 8 Main bearing 9 Auxiliary frame 10 Auxiliary bearing 11 Hollow chamber 13 First scroll 14 Second scroll 15, 18　End plate 16, 19 lap 17 Drive shaft 20 Driven axis 21 Compressed space 24 Regulation member 29 Oldham joint 40 Inlet 41 Refrigerant guide member 42 Opening 44 Suction pipe

Claims (3)

[Claims] Claim 1: A first scroll having an electric element and a scroll compression element housed in a closed container, the scroll compression element having a shaft connected to the electric element with a spiral wrap erected on an end plate. a second scroll having an axis eccentric to the center of the axis of the first scroll and having a spiral wrap erected on an end plate that faces and engages with the first scroll; a main frame having a main bearing that pivotally supports the shaft of the second scroll; an auxiliary frame having an auxiliary bearing that pivotally supports the shaft of the second scroll; and a hollow chamber formed inside the auxiliary frame and the main frame. These scrolls are rotated and oscillated in the same direction so that the plurality of compression spaces formed by the first scroll and the second scroll are compressed gradually from the outside to the inside. In the scroll compressor, the scroll part in the hollow chamber is provided with a suction port that guides the refrigerant flowing from the suction pipe into the compression space into the compression space. The scroll part has an opening around one axis concentric with the other axis,
A scroll compressor characterized in that a refrigerant guide member is attached to cover a suction port provided in the scroll portion. 2. A first scroll having an electric element and a scroll compression element housed in an airtight container, the scroll compression element having a shaft connected to the electric element with a spiral wrap erected on an end plate. a second scroll having an axis eccentric to the center of the axis of the first scroll and having a spiral wrap erected on an end plate that faces and engages with the first scroll; a main frame having a main bearing that pivotally supports the shaft of the second scroll; an auxiliary frame having an auxiliary bearing that pivotally supports the shaft of the second scroll; and a hollow chamber formed inside the auxiliary frame and the main frame. These scrolls are rotated and oscillated in the same direction so that the plurality of compression spaces formed by the first scroll and the second scroll are compressed gradually from the outside to the inside. It is composed of an Oldham joint and a regulating member that is fixed to one of the two scrolls and regulates the movement of the other scroll in the axial direction, and the scroll part in the hollow chamber has a suction pipe connected to the hollow chamber. In a scroll compressor that is provided with an inlet that guides refrigerant that has flowed into a compression space, the scroll portion in the hollow chamber of the scroll compression element has an opening around one axis and concentric with the other axis, and
A scroll compressor characterized in that a refrigerant guide member is attached to cover an inlet provided in the scroll portion, and the refrigerant guide member is opposed to an opening of the refrigerant guide member. 3. The scroll compressor according to claim 2, wherein the refrigerant guide member is formed into a cup shape such that the diameter on the opening side is smaller than the diameter on the mounting side of the scroll portion.