JP2006220105A - Scroll compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor enabling the manufacture of a binding member at low cost and the easy assembling of the compressor. <P>SOLUTION: This scroll compressor comprises an enclosed container 1 and a compressor assembly 5 formed of at least a compressing element 2, a drive element 3, and a support element 4. When a plurality of tightening members 6 are fixedly tightened to the compressor assembly 5, they are positioned and tightened so that the side faces of the tightening members are brought into contact with the inner side of the enclosed container. Since the tightening members 6 and the inside of the enclosed container need not be machined accurately, the compressor with low noise can be manufactured at low cost. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a hermetic scroll compressor for gas compression.

10 to 12 are diagrams relating to, for example, a conventional scroll compressor disclosed in Patent Document 1 below, in which 1 is a sealed container, 2 is a compression element composed of a fixed scroll, a swing scroll, and the like. Is an electric motor and a driving element constituted by parts such as a main shaft for transmitting the driving force of the electric motor, 4 is a supporting element constituted by parts such as a frame for supporting parts such as the main shaft, and 5 is a compression element 2 and a driving element 3 A compressor assembly 6 </ b> A constituted by the support element 4 is a cup-shaped coupling member that couples the hermetic container 1 and the compressor assembly 5. The coupling member 6A has a plurality of integrally formed side wall portions 6a and a bottom portion 6b. Bolt holes 7 are provided at four equally spaced positions on the bottom portion 6b, and a plurality of strip-shaped notches 6c are provided on the side wall portions. 6a is provided. The bottom 6b of the coupling member 6A is sandwiched between the compression element 2 and the drive element 3 and is fixed via a through bolt 8. Furthermore, the side wall 6a of the cup-shaped coupling member 6A and the sealed container 1 are coupled by welding or the like.

The operation of this conventional scroll compressor will be briefly described, and the driving force generated by the drive element 3 is transmitted to the compression element 2 to perform the compression operation to compress the working fluid. Further, noise generated when the compression operation is performed by the compression element 2 is transmitted to the sealed container 1 through the coupling member 6A. In this conventional scroll compressor, the transmitted noise is attenuated by the elasticity of the coupling member 6A, and the noise radiated outward from the sealed container 1 is reduced.

When the compression action is performed, a contact sound between components in the compression element 2 or a fluid sound is generated, which is a source of operation noise. Here, the resonance frequency composed of the mass and elasticity of the compressor assembly 5 including the compression element 2, the drive element 3 and the support element 4 is set lower than the noise frequency generated in the compression element 2, and the compressor assembly 5 is transferred to the sealed container 1. Attenuates transmitted noise.

Japanese Patent Laid-Open No. 11-13654 (FIG. 1)

The conventional scroll compressor is configured as described above, and the cup-shaped coupling member 6A is formed by a press or the like, and it is difficult to form the side surface of the coupling member 6A in a circular shape. As shown in FIG. 12, a gap d and a torsion f of the side wall 6a are generated between the side wall 6a and the inner surface of the sealed container 1, which makes it difficult to fix the sealed container 1 and the coupling member 6A. there were. For example, when the sealed container 1 and the coupling member 6A are fixed by welding, there is a problem that welded spatter enters the sealed container 1 from the gap d between the two. Further, if the outer periphery of the coupling member 6A is larger than the inner diameter of the sealed container 1, it becomes difficult to insert the coupling member 6A into the sealed container 1 and there is a problem that the assembling work is hindered.

In order to solve this problem, it is necessary to ensure the processing accuracy of the outer peripheral surface of the side wall 6a of the coupling member 6A and the inner peripheral surface of the sealed container 1, and it is necessary to manage the shape and dimensions by machining or the like. Man-hours and costs were required to secure it.

The present invention has been developed in view of the above-mentioned problems, and its purpose is to solve the above-mentioned problems, to manufacture a coupling member at low cost, and to easily assemble a compressor. Is to provide.

The invention according to claim 1 is a scroll compressor comprising a sealed container, a compressor assembly provided in the sealed container, and a coupling member for connecting the compressor assembly to the sealed container. Are connected to the above-mentioned sealed container via a plurality of L-shaped or substantially L-shaped coupling members.

The invention according to claim 2 is a sealed container, a compression element constituted by parts such as a fixed scroll and an orbiting scroll, a drive element constituted by parts such as an electric motor and a main shaft for transmitting driving force of the electric motor, A first frame that supports components such as the main shaft, and a support element that is provided on a side facing the first frame across the electric motor, and is configured by components such as a second frame that supports the main shaft, and at least A scroll compressor including a compressor assembly integrally formed by the compression element, the driving element, and the support element, wherein the compressor assembly and the sealed container are supported via a coupling member. And a plurality of L-shaped or substantially L-shaped coupling members, and the coupling member is coupled to the compressor assembly. Machine assembly and is obtained by connecting the above closed container.

According to a third aspect of the present invention, in the configuration of the scroll compressor according to the first or second aspect, the plurality of coupling members are arranged apart from each other in the inner circumferential direction of the sealed container and abut against the inner surface of the sealed container, respectively. Are combined.

As described above, according to the present invention, since the coupling member is not formed in a cup-shaped integral shape as in the prior art, but formed in a plurality of L-shapes or substantially L-shapes, each coupling member can be positioned and assembled. In addition, when connecting to the sealed container, there is no gap between the inner surface of the sealed container and each coupling member can be easily and reliably fixed to the sealed container.

Further, according to the present invention, since a plurality of coupling members can be positioned and assembled, there is no gap between the sealed container and the coupling member, and when the sealed container and the coupling member are fixed by welding. The conventional problem that welding spatter penetrates into the sealed container from between the two can be solved. Further, since the coupling member is L-shaped or substantially L-shaped, it is difficult to insert into the sealed container as in the case of the conventional cup-shaped coupling member, which hinders assembly work. It does not occur at all, and the assembly work can proceed smoothly.

Further, according to the present invention, the plurality of coupling members can be divided and arranged in the circumferential direction, and the outer circumferential surface of each coupling member can be positioned and assembled so as to abut against the inner circumferential surface of the sealed container. There is no need to process the inner peripheral surface of the hermetic container with high accuracy, and a compressor with low noise can be obtained at low cost.

Embodiment 1 FIG.
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a simplified cross-sectional view showing a scroll compressor according to the present invention. In FIG. 1, 1 is a sealed container, 2 is a compression element constituted by a fixed scroll 2a and a swinging scroll 2b, and 3 is an electric motor 3a. And a driving element 4 constituted by parts such as a main shaft 3b for transmitting the driving force of the electric motor 3a, and a side 4 facing the first frame 4a across the first frame 4a supporting the parts such as the main shaft 3b and the electric motor 3a. Is provided with a support element constituted by parts such as a second frame 4b that supports the main shaft 3b, 5 is a compressor assembly constituted by the compression element 2, the drive element 3 and the support element 4, and 6 is a sealed container 1 Is a connecting member that connects the compressor assembly 5 and the compressor assembly 5 and is fixed to the compressor assembly 5 by bolting or the like.

FIG. 2 is a perspective view of the coupling member according to the present invention. The coupling member 6 of FIG. 2 is formed by bending a rectangular spring material having an appropriate thickness and length into an L shape or a substantially L shape. The part 6a and the bottom part 6b are integrally formed, the bolt hole 7 is formed in the bottom part 6b, and the side wall part 6a is curved so as to be in contact with the inner surface 1a of the sealed container 1. If the coupling member 6 is too thick, the noise attenuation effect is reduced, and if it is too thin, the support strength is weakened. Therefore, the coupling member 6 is formed of a spring material having an appropriate thickness.

In the scroll compressor according to the present invention, four coupling members 6 are used as shown in FIG. As shown in FIG. 1, the bottom portion 6 b of each coupling member 6 is sandwiched between the first frame 4 a of the compressor assembly 5 and the drive element 3, and the through bolt 8 passes through the support element 4 from the support element 4 side. It is fixed by screwing into the screw hole 4c of the first frame 4a through the hole 4c, the through hole 3c of the drive element 3, and the bolt hole 7 of the coupling member 6.

When the compressor assembly 5 is fixed to the inner surface 1a of the hermetic container 1, the coupling members 6 are arranged at equal intervals in the circumferential direction of the hermetic container 1, and the compressor assembly is formed with the through bolts 8 as described above. 5, the outer side surface 6 c of the side wall portion 6 a of each coupling member 6 is positioned so as to contact the inner surface 1 a of the sealed container 1, and the coupling member 6 is coupled and fixed to the compressor assembly 5 with a bolt 8. It is what I did.

Furthermore, the inner surface 1a of the sealed container 1 and each coupling member 6 are coupled by spot welding or the like, so that the compressor assembly 5 is supported inside the sealed container 1 via a plurality of coupling members 6.

The coupling member 6 sets the elastic modulus by adjusting the width, length and thickness so as to obtain a noise attenuation effect.

Further, in the coupling member 6 of the example shown in FIG. 4, the bolt hole 7 for bolt fastening is molded into an ellipse so that the position adjustment of the coupling member 6 is easy.

FIG. 5 shows the position adjustment of the coupling member 6 in the radial direction and the position adjustment in the rotation direction. The position adjustment can be easily performed by using a positioning jig.

Further, as shown in FIG. 6, for example, when assembling the compressor assembly 5, the jig 9 as shown in FIG. 7 is used to position the compressor assembly 5 and the coupling member 6, and after the fastening, the jig 9 is removed. Thereafter, the sealed container 1 and the coupling member 6 may be fixed by welding or the like.

FIG. 8 shows another example of the coupling member 6, which is a substantially L-shaped coupling member 6 having a joint surface having substantially the same curvature as the inner surface 1 a side of the sealed container 1 (see FIG. 1). 10, the gap between the inner surface 1a side of the sealed container 1 and the joint surface 10 of the coupling member 6 can be reduced. Thus, if the outer periphery of the coupling member 6 is configured with substantially the same curvature as the inner surface 1a side of the sealed container 1, the gap between the sealed container 1 and the sealed container 1 can be further reduced, and spatter intrusion during welding can be prevented.

Further, the elastic modulus can be adjusted by adjusting the width and length of the coupling member 6, and the resonance frequency consisting of the mass of the compressor assembly 5 and the elasticity of the elastic member can be adjusted. By arbitrarily adjusting the resonance frequency, it is possible to arbitrarily set the attenuation characteristic of the noise transmitted from the compressor assembly 5 to the sealed container.

When the scroll compressor according to the present invention is operated, it is transmitted to the compression element 2 by the driving force generated by the driving element 3 to perform the compression operation and compress the working fluid. Noise generated when the compression operation is performed by the compression element 2 is transmitted to the sealed container 1 through each coupling member 6. Here, the transmitted noise is attenuated by the elasticity of each coupling member 6, and the noise emitted to the outside from the sealed container 1 is reduced.

In the configuration of the scroll compressor according to the present invention, the compressor assembly 5 is positioned and assembled so that the outer surface 6 c of the side wall portion 6 a of the plurality of coupling members 6 contacts the inner surface 1 a of the sealed container 1. Therefore, the scroll compressor can be easily assembled regardless of the accuracy of the coupling member 6.

Further, in the processing and formation of the coupling member 6, as compared with the processing and formation of the conventional coupling member 6 </ b> A (see FIG. 11), perfect circle grinding is not required, and the manufacturing cost can be reduced. Furthermore, gaps are formed between the coupling members 6 that are spaced apart in the circumferential direction of the sealed container 1, and these gaps penetrate in the vertical direction. The inside is easily cooled.

Further, as shown in FIG. 9, a bottom bolt 6b of the coupling member 6 is sandwiched between the first frame 4a and the electric motor 3a, and the second frame 4b, the electric motor 3 and the first frame 4a are fastened with a through bolt 8. If the coupling member 6 is also fastened, it can be simply configured without increasing the number of parts.

In the scroll compressor according to the present invention, the number of coupling members 6 is not limited to four, and may be more or less than four as long as it is plural.

It is a longitudinal cross-sectional view of the scroll compressor by Embodiment 1 of this invention. It is a perspective view of the coupling member concerning this invention. It is a cross-sectional view at the time of providing the coupling member concerning this invention in the airtight container. It is a perspective view of the coupling member of the other example concerning this invention. It is a top view in the case of the positioning adjustment of the coupling member concerning this invention. It is a fragmentary longitudinal cross-sectional view which positions the coupling member concerning this invention using a jig. It is the perspective view which notched some jigs of one example. It is a perspective view of the coupling member of another example concerning this invention. It is a longitudinal cross-sectional view in the case of fastening together the coupling member concerning this invention with a through bolt. It is sectional drawing of the scroll compressor of a prior art example. It is a perspective view of the coupling member of a prior art example. It is a cross-sectional view at the time of providing the coupling member of a prior art example in an airtight container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container, 1a inner surface, 2 Compression element, 2a Fixed scroll, 2b Rocking scroll, 3 Drive element, 3a Electric motor, 3b Main shaft, 4 Support element, 4a First frame, 4b Second frame, 5 Compressor assembly , 6 coupling members, 8 through bolts.

Claims (3)

In a scroll compressor comprising a hermetic container, a compressor assembly provided in the hermetic container, and a coupling member for connecting the compressor assembly to the hermetic container, the compressor assembly is attached to the hermetic container in an L-shape. A scroll compressor characterized in that it is connected via a plurality of coupling members that are shaped like or substantially L-shaped. It supports a sealed container, a compression element constituted by parts such as a fixed scroll and an orbiting scroll, a drive element constituted by parts such as an electric motor and a main shaft for transmitting the driving force of the electric motor, and the parts such as the main shaft. A support element that is provided on a side facing the first frame with the first frame and the electric motor interposed therebetween, and is configured by parts such as a second frame that supports the main shaft; and at least the compression element, the drive element, and A scroll compressor comprising a compressor assembly integrally formed by the support element, wherein the compressor assembly and the sealed container are supported via a coupling member, wherein the sealed container and the L-shaped or substantially L-shaped A plurality of coupling members having a shape, and coupling the coupling member to the compressor assembly. Scroll compressor according to claim configuration linked and. The scroll compressor according to claim 1 or 2, wherein a plurality of coupling members are arranged apart from each other in the inner circumferential direction of the sealed container and are brought into contact with each other and coupled to the inner surface of the sealed container.

Images