JP2007327437A - Scroll compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable scroll compressor capable of coping with different arrangement of such as a delivery port part. <P>SOLUTION: This scroll compressor 1 has a rear case 11 and a scroll compression mechanism 5 having a fixed scroll 21 fixed and supported in the rear case 11 and a turning scroll 23 meshed with the fixed scroll 21, forming a plurality of compression spaces P and performing revolving turning motion. The rear case 11 has respectively a first delivery boss part 45 and a second delivery boss part 47 capable of processing delivery holes 53 and 55 in a plurality of places communicable with a delivery space 43. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a scroll compressor.

In the scroll compressor, a fixed scroll and a turning scroll are combined inside a housing, and the orbiting scroll revolves with respect to the fixed scroll to suck, compress, and discharge fluid.
Therefore, the housing is provided with a suction port portion that sucks fluid from the outside and a discharge port portion that discharges fluid to the outside.
On the other hand, the scroll compressor may be required to change the arrangement of the suction port portion and the discharge port portion depending on the situation of use. Conventionally, it corresponds as an arrangement according to the request.
Further, for example, as disclosed in Patent Document 1 and Patent Document 2, some devices have been devised so as to respond by changing a part of the housing.

JP 60-108649 A JP 2006-29111 A

  However, the conventional ones including Patent Document 1 and Patent Document 2 need to be a housing in which the arrangement of the suction port portion or the discharge port portion is different for every request, whether partially or as a whole. There was a problem that the sharing rate decreased, the mass production effect could not be exhibited, and the manufacturing cost increased.

  An object of this invention is to provide the scroll compressor which can respond to different arrangement | positionings, such as a discharge outlet part, and can be manufactured cheaply in view of the said problem.

In order to solve the above problems, the present invention employs the following means.
That is, a scroll compressor according to the present invention includes a housing, a fixed scroll fixedly supported in the housing, and a compression scroll having a revolving orbiting motion engaged with the fixed scroll and forming a plurality of compression chambers. A scroll compressor having a mechanism, wherein the housing is provided with boss portions capable of processing communication holes at a plurality of locations where the housing can communicate with a predetermined space portion inside. And

As described above, the housing is provided with the boss portions capable of processing the communication holes at a plurality of locations where the housing can communicate with a predetermined space portion inside, so that it is necessary for arrangement among the plurality of boss portions. A communication hole can be machined in a boss portion at various locations to allow communication between a predetermined internal space and the outside. That is, the housing can be shared by a plurality of types of scroll compressors in which the predetermined space portion inside and the position of the communication hole differ from the outside.
For this reason, for example, it is possible to reduce the manufacturing cost of the housing because it can produce mass production effects such as inventory management, reduction of design cost and production man-hours, etc., because it is only necessary to manufacture a mold with a large proportion of the cost. The manufacture of the scroll compressor can be made inexpensive.

Moreover, in the said invention, it is suitable for the said communicating hole processed into the said boss | hub part to be each turned to a different direction.
In this way, the housing can be shared by a wider variety of types of scroll compressors, so that a mass production effect can be further exhibited.

Moreover, in the said invention, it is suitable for the discharge space which receives the compressed fluid discharged from the said compression mechanism.
In this way, since the housing can be shared by a plurality of types of scroll compressors having different arrangements of the discharge ports for discharging the compressed fluid from the discharge space to the outside, a mass production effect can be exhibited.

Moreover, in the said invention, it is suitable for the suction space which supplies a to-be-compressed fluid to the said compression mechanism.
In this way, since the housing can be shared by a plurality of types of scroll compressors having different arrangements of the suction port for sucking the fluid to be compressed into the suction space from the outside, a mass production effect can be exhibited.

According to the present invention, since the housing is provided with the boss portions capable of processing the communication holes at a plurality of locations where the housing can communicate with the predetermined internal space portion, the internal predetermined space portion communicates with the outside. A plurality of types of scroll compressors having different hole positions can share a housing.
For this reason, since the mass production effect can be exhibited, the manufacturing cost of the housing can be reduced, and the manufacturing of the scroll compressor can be made inexpensive.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a cross-sectional view illustrating a configuration of a scroll compressor 1 according to the present embodiment. 2 is a front view showing the rear case 11, FIG. 3 is a view as viewed in A in FIG. 2, FIG. 4 is a view as viewed in B in FIG. 2, and FIG.
The scroll compressor 1 includes a housing 3, a scroll compression mechanism (compression mechanism) 5, a rotation prevention unit 7, and a crankshaft 9.

As shown in FIG. 1, the housing 3 is a sealed container in which a scroll compression mechanism 5 and the like are arranged.
The housing 3 is provided with a rear case 11 constituting a rear (upper side in FIG. 1) and a front case 13 constituting a front (lower side in FIG. 1) part.
The rear case 11 has a hollow substantially dome shape, and is made of, for example, an aluminum alloy by casting.
The front case 13 has a shape in which a hollow cylinder and a truncated cone are combined. For example, the front case 13 is made of an aluminum alloy and formed by casting.

At the front portion of the rear case 11, four rear attachment portions 15 protrude from the circumferential direction at substantially equal intervals. At the rear part of the cylindrical part of the front case 13, a front mounting part 17 is provided to project at a position corresponding to the rear mounting part 15.
The rear case 11 and the front case 13 are joined together by fastening the rear attachment portion 15 and the front attachment portion 17 with bolts 19 to form a sealed space (suction space) M therein.

The scroll compression mechanism 5 includes a fixed scroll 21 and a turning scroll 23.
The fixed scroll 21 includes a fixed end plate 25 and a spiral fixed spiral body 27 standing on the front surface thereof.
On the rear side of the fixed end plate 25, there are formed a concave portion 29 that is recessed forward in the central portion and a rear end surface 31 that surrounds the concave portion 29 in an annular shape.

The rear end surface 31 is abutted against an end surface 33 provided in an annular shape on the front surface of the rear case 11, and a plurality of locations (three locations in the present embodiment) are joined by bolts 35, whereby the fixed scroll 21 is fixed to the rear case 11. It is fixedly attached to.
At this time, since the rear case 11 and the fixed scroll 21 are sealed from the sealed space M by the seal 37 over the entire length on the outer peripheral side, the discharge chamber 39 is formed by the hollow portion of the fixed scroll 21 and the concave portion 29 of the fixed end plate 25. It is formed.
A compressed fluid discharge port 41 is formed at a substantially central portion of the concave portion 29 of the fixed end plate 25. The discharge port 41 is opened and closed by a discharge valve (not shown) attached to the rear surface of the fixed end plate 25 and discharges the compressed fluid into the discharge chamber 39.

A discharge space (space portion) 43 communicating with the discharge chamber 39 is formed near one rear mounting portion 15 of the rear case 11.
A first discharge boss portion (boss portion) 45 and a second discharge boss portion (boss portion) 47 extending in directions substantially orthogonal to each other with the rear attachment portion 15 interposed therebetween are provided.
The first discharge boss portion 45 and the second discharge boss portion 47 each have a height that exceeds the longitudinal length of the discharge space 43 in the front-rear direction (vertical direction in FIG. 1, paper direction in FIG. 2). Has a bowl shape. The first discharge boss portion 45 and the second discharge boss portion 47 are provided with a first tall portion 49 and a second tall portion 51 having high heights at outer end portions.

A discharge hole (communication hole) 53 extending from the outer end portion of the first tall portion 49 to the discharge space 43 is excavated in the first discharge boss portion 45.
The discharge hole 53 constitutes a discharge port portion that supplies the compressed fluid discharged from the scroll compression mechanism 5 to the outside.
A discharge hole (communication hole) 55 extending from the outer end portion of the second tall portion 51 to the discharge space 43 can be excavated in the second discharge boss portion 47 as necessary.
The discharge hole 53 or the discharge hole 55 is selected according to the position where the discharge port portion is required when the scroll compressor 1 is used, and the selected one is excavated.

A suction boss portion (boss portion) 57 is provided at the front end portion of the cylindrical portion of the front case 13.
The suction boss portion 57 is excavated with a suction port portion (communication hole) 59 that communicates with the sealed space M and introduces a fluid to be compressed into the sealed space M from the outside.
In the present embodiment, the suction boss portion 57 is provided at only one location, but may be provided at a plurality of locations so that the suction port portion 59 is selectively excavated.

The orbiting scroll 23 includes an orbiting end plate 61 and a spiral orbiting spiral body 63 standing on the rear surface thereof.
The orbiting scroll 23 is installed so that the orbiting spiral body 63 meshes with the fixed spiral body 27.
The fixed scroll 21 and the orbiting scroll 23 are point-symmetric with respect to the centers of the fixed spiral body 27 and the orbiting spiral body 63 by being engaged with each other with a phase difference of 180 degrees while being eccentric from each other by a predetermined distance. Compression chambers P serving as sealed spaces are formed at a plurality of locations having the positional relationship.
At the center of the front surface of the swivel end plate 61 (lower surface center in FIG. 1), a hollow cylindrical swivel boss 65 is provided so as to protrude forward.

The orbiting scroll 23 is supported on the front case 13 so as to be able to make a revolving orbiting movement with respect to the fixed scroll 21.
The rotation prevention unit 7 includes a plurality of rings 67 and a plurality of pins 69.
Each ring 67 is provided in a plurality of ring holes 71 provided on the outer peripheral side of the front end face of the orbiting end plate 61 and at a substantially equal interval from the center of the orbiting scroll 23 on the circumference of a predetermined radius. It is press-fitted or loosely fitted.

The number of pins 69 is the same as that of the ring 67, and each pin 69 is inserted into the rear end surface of the truncated cone portion of the front case 13 so as to protrude into the corresponding ring 67.
The orbiting scroll 23 is engaged with the front case 13 when the pin 69 is loosely inserted into the ring 67, and is prevented from rotating when revolving. At this time, the pin 69 rotates in the same direction as the revolution direction of the orbiting scroll 23 along the inner peripheral surface of the ring 67.
A known Oldham ring mechanism may be used as the rotation prevention unit 67.

The crankshaft 9 is arranged so as to extend in the front-rear direction, and a large-diameter shaft portion 73 provided on the rear side can rotate to the front case 13 via a main bearing 75 and a small-diameter shaft portion on the front side can rotate via a sub-bearing 77. It is supported by.
A lip seal 79 formed of a mechanical seal is provided between the main bearing 75 and the sub-bearing 77 of the crankshaft 9 so as to hermetically seal the interior of the front case 13 and the atmosphere.
The front end portion of the crankshaft 9 protruding from the front case 13 is configured to be rotated by driving means such as an engine or a motor (not shown).

A crank chamber 81 in which the turning boss 65 is fitted with a margin is provided at the center of the rear side of the front case 13.
On the rear side of the large-diameter shaft portion 73 of the crankshaft 9, an eccentric shaft 83 whose axis is eccentric is provided so as to be positioned in the hollow portion of the turning boss 65.
A balance weight 85 is provided around the eccentric shaft 83. The balance weight 85 is disposed in the crank chamber 81 so as to cover around the eccentric shaft 83 and the front end portion extends in a direction opposite to the eccentric direction (left direction in FIG. 1) of the eccentric shaft 83 (right direction in FIG. 1). The large-diameter shaft portion 73 is fixedly attached.

An eccentric bush 87 is rotatably fitted in the hollow portion of the swivel boss 65 through a bearing 89 so as to cover the cylindrical balance weight 85 positioned in the swivel boss 65.
The center line of the eccentric bush 87 is eccentric with respect to the center line of the crankshaft 9.
The eccentric bush 87 has a function of transmitting the rotational driving force of the crankshaft 9 to the orbiting scroll 23 and driving the orbiting scroll 23 to revolve.

The compression operation of the scroll compressor configured as described above will be described.
A rotational driving force from an engine, an electric motor, or the like (not shown) is transmitted to the crankshaft 9, and this rotational driving force is turned by the scroll compression mechanism 5 via the eccentric shaft 83, the balance weight 85, the eccentric bush 87, and the turning boss 65. It is transmitted to the scroll 23.
The orbiting scroll 23 is prevented from rotating by the rotation preventing unit 7 and is driven to perform a revolving orbiting motion on a circular orbit having a revolution orbiting radius as a radius.

When the orbiting scroll 23 is driven to revolve, the fluid enters the sealed space M of the housing 3 through the suction port 59 and is sucked into the compression chamber P of the scroll compression mechanism 5.
Then, as the volume of the compression chamber P decreases due to the revolving orbiting motion of the orbiting scroll 23, the fluid reaches the central compression chamber P while being compressed.
The compressed fluid that reaches the central compression chamber P is discharged from the discharge port 41 to the discharge chamber 39.
The compressed fluid discharged into the discharge chamber 39 passes through the discharge hole 43 via the communicating discharge space 43 and is used as the compressed fluid. For example, if the compressed fluid is a refrigerant of an air conditioner, it is sent to the radiator. Supplied.

At this time, the balance weight 85 is rotated by the eccentric shaft 83 of the crankshaft 9 in a state that is approximately 180 degrees out of phase with the revolving orbiting motion of the orbiting scroll 23. Therefore, the centrifugal force acting on the orbiting scroll 23 is canceled by the balance weight 85, and the dynamic imbalance is reduced.
Further, since the orbiting scroll 23 revolves while the balance weight 85 rotates, the tip of the balance weight 85 disposed in the crank chamber 81 relatively rotates in the crank chamber 81.

Next, manufacture of this scroll compressor 1 is demonstrated.
The rear case 11, the front case 13, the fixed scroll 21 and the orbiting scroll 23 are each formed by casting using an aluminum alloy.
At this time, the rear case 11 constituting the housing 3 is cast in a state where the first discharge boss portion 45 and the second discharge boss portion 47 are solid, that is, the discharge holes 53 and 55 are not excavated.
Either the first discharge boss portion 45 or the second discharge boss portion 47 that is oriented in a necessary direction where the scroll compressor 1 is used is selected, and the selected first discharge boss portion 45 or second discharge boss portion is selected. A discharge hole 53 or a discharge hole 55 is excavated in 47.

That is, one rear case 11 can cope with two types of scroll compressors 1 having different directions and positions of the discharge holes 53 and 55 communicating from the discharge space 43 to the outside. In other words, the rear case 11 can be shared by two types of scroll compressors 1 having different directions and positions of the discharge holes 53 and 55.
For this reason, in manufacturing the rear case 11 corresponding to the two types of scroll compressors 1, for example, it is only necessary to manufacture a mold having a large proportion of the cost, such as inventory management, design cost, and production man-hours. Since the mass production effect such as reduction can be exhibited, the manufacturing cost of the rear case 11 can be reduced, and the scroll compressor 1 can be manufactured at a lower cost.

In the present embodiment, the boss portions for forming the discharge holes are provided at two positions sandwiching the rear attachment portion 15. However, for example, the discharge space 43 is provided at a position away from the rear attachment portion 15, and the boss portion is provided. You may make it provide in three places in addition to the position of the rear attachment part 15 of FIG.
Further, the discharge space 43 may be made large, for example, to extend over the entire circumference, so that more bosses may be installed in many directions.
Further, the directions may be the same and the positions may be different.

In the present embodiment, the front case 13 constituting the housing 3 is provided with only one suction boss portion 57, but it may be provided at a plurality of locations that can communicate with the sealed space M.
In this case, the scroll compressor 1 having the suction port portions 59 having different directions and positions can be handled by the single front case 13, so that a mass production effect is exhibited in manufacturing the front case 13. be able to.

  Further, in the present embodiment, the discharge port portion is provided in the rear case 11 and the suction port portion 59 is provided in the front case 13, but the discharge port portion and the suction port portion are either the rear case 11 or the front case 13. And at least one of the discharge port portion and the suction port portion may be processed in plural.

It is sectional drawing which shows the whole schematic structure of the scroll compressor concerning one Embodiment of this invention. It is a front view which shows the rear case concerning one Embodiment of this invention. It is A view of FIG. FIG. 3 is a B view of FIG. 2. It is XX sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scroll compressor 3 Housing 5 Scroll compression mechanism 11 Rear case 13 Front case 21 Fixed scroll 23 Orbiting scroll 43 Discharge space 45 First discharge boss part 47 Second discharge boss part 53, 55 Discharge hole M Sealed space P Compression chamber

Claims (4)

A housing;
A fixed scroll that is fixedly supported in the housing, and a compression mechanism that is engaged with the fixed scroll and has a revolving orbiting motion by forming a plurality of compression chambers;
A scroll compressor comprising:
The scroll compressor is characterized in that the housing is provided with boss portions capable of processing communication holes at a plurality of locations where the housing can communicate with a predetermined internal space.   The scroll compressor according to claim 1, wherein the communication holes processed in the boss portion are directed in different directions.   The scroll compressor according to claim 1, wherein the space portion is a discharge space that receives the compressed fluid discharged from the compression mechanism. The scroll compressor according to any one of claims 1 to 3, wherein the space portion is a suction space that supplies a fluid to be compressed to the compression mechanism.

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