JP3058629U - Seal device for scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor sealing device which is easy to manufacture and has a high sealing effect. An orbiting scroll, a fixed scroll, and an isolation block are provided. A seal ring and an elastic component are installed between the fixed scroll and the isolation block, and the seal ring and the elastic component are disposed at an upper end portion of a discharge port of the fixed scroll. When the compressor starts, the upper and lower parts of the seal ring are low pressure,
The seal ring is urged upward by the elasticity of the elastic component to form a high pressure in the compression chamber, and the high pressure formed in the compression chamber pushes the seal ring upward, thereby sealing at high pressure and low pressure. It is characterized by achieving the effect.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a kind of seal device for a scroll compressor, and more particularly, to a device having a seal device which can be manufactured at low cost between a fixed scroll and an isolation block of a scroll compressor.

[0002]

[Prior art]

 A scroll compressor has a plurality of hermetically sealed spaces formed by one fixed scroll and one orbiting scroll meshing with each other, and the volume of the hermetically sealed space is gradually reduced from the outer edge toward the center. The working principle of this is shown in FIG. 1 and FIG. The orbiting scroll 1 orbits relative to the fixed scroll 2, compresses the low-pressure working fluid a by entering through the suction port b, and further causes the working fluid a to move toward the center of the fixed scroll 2 by continuous orbiting of the orbiting scroll 1. A high pressure state is discharged from the discharge port c provided in the vicinity, and the discharge is completed, thereby completing the compression stroke of the working fluid.

FIG. 3 shows a kind of conventional scroll compressor. This scroll compressor includes a orbiting scroll 1, a fixed scroll 2 and an isolation block 3, and the isolation block 3 is provided on the fixed scroll 2 to form a compression chamber in the fixed scroll 2 and the orbiting scroll 1. In order to prevent the working fluid from leaking, a seal member 5 is provided between the neck portion extending from the upper end of the fixed scroll 2 and the perforation 4 of the isolation block 3. This structure has the following disadvantages. First, the perforation 4 of the isolation block 3 needs to be well aligned with the center of the frame 6, the orbiting scroll 1, and the fixed scroll 2, making the production and assembly difficult and relatively expensive. became. Secondly, since the perforations 4 of the isolation block 3 are very long, it is difficult to form them by pressure, and they must be formed by forging or casting.

[0004]

[Problem to be Solved by the Invention] The present invention has an object to provide a kind of sealing device for a scroll compressor, which uses a sealing structure composed of a sealing ring and an elastic component to form an isolation block. Eliminates the need to center perforations with orbiting scrolls, fixed scrolls and frames, reduces manufacturing and assembly difficulties, lowers manufacturing costs, and reduces the need for drilling of isolation blocks. And reduce manufacturing costs.

[0005]

[Means for Solving the Problems]

 The invention of claim 1 comprises a fixed scroll 11, an orbiting scroll 10, and an isolation block 12, which has a fixed scroll wrap 21 having a spiral shape and a discharge port in the center, and the orbiting scroll 10 is orbited. A plurality of compression chambers are formed between the fixed scroll 11 and the scroll wrap 20. The low-pressure working fluid sucked into the compression chamber from the suction port through the suction port is driven by external force and driven to revolve. Compressed by orbit and compressed to a high-pressure state and discharged from the discharge port of the fixed scroll 11, the isolation block 12 is housed in a case 22 of the scroll compressor, and the case 22 is partitioned into a high-pressure housing chamber and a low-pressure housing chamber. In the scroll compressor in which the isolation block 12 is provided with a perforation 26 communicating with the high-pressure storage chamber and the low-pressure storage chamber, A seal ring 24 and an elastic component 25 are provided between the scroll 11 and the isolation block 12, and the seal ring 24 and the elastic component 25 are provided at an upper end portion of the discharge port of the fixed scroll 11, and the elastic component 25 is attached to the seal ring. 24, the seal ring 24 is pushed upward by the elasticity of the elastic part 25, which is advantageous for forming a high pressure in the compression chamber, and the seal ring 24 is pushed upward by the high-pressure gas formed in the compression chamber. In this way, the seal device of the scroll compressor is configured to perform sealing at high pressure and low pressure.

According to a second aspect of the present invention, there is provided a scroll compressor sealing device according to the first aspect, wherein the seal ring 24 is made of a metal material.

According to a third aspect of the present invention, there is provided a seal device for a scroll compressor according to the first aspect, wherein one seal member 27 can be provided on an outer wall of the seal ring 24.

[0008]

[Embodiment of the invention]

 The seal device of the scroll compressor according to the present invention includes an orbiting scroll, a fixed scroll and an isolation block, a seal ring and an elastic component are installed between the fixed scroll and the isolation block, and the seal ring and the elastic component are discharged from the fixed scroll. It is located at the upper end of the outlet, and the elastic part is located below the seal ring.When the compressor starts, both the top and bottom of the seal ring are at low pressure, and the seal ring is turned upward by the elasticity of the elastic part. It is energized and is advantageous for forming a high pressure in the compression chamber.When a high pressure is formed in the compression chamber, the seal ring is pushed upward by the high pressure of the compression chamber, and responds to the pressure change in the compression chamber. A sealing effect is achieved. The present invention makes use of the seal structure consisting of the seal ring and elastic parts, eliminating the need to center the perforation of the isolation block with the orbiting scroll, fixed scroll and frame, reducing the difficulty of manufacturing and assembly. The manufacturing cost is also reduced by reducing the manufacturing cost and shortening the perforation of the isolation block so that the isolation block can be easily manufactured by pressure molding.

[0009]

【Example】

 As shown in FIGS. 4 and 5, the scroll compressor to which the present invention is applied includes a rotary scroll 10, a fixed scroll 11, an isolation block 12, an Oldham ring 13, a frame 14, a crankshaft 15, a motor rotor 16 and A motor stator 17 is provided, the crankshaft 15 and the motor rotor 16 are connected and fixed, and a fitting wheel 18 is provided on the upper part of the crankshaft 15. After power is supplied to the motor, the motor rotor 16 rotates the crankshaft 15 together. A fitting wheel 18 on the upper part of the crankshaft 15 is transmitted to the orbiting scroll 10 to perform an eccentric rotation with respect to the center of the motor rotor 16. An Oldham ring 13 is provided on an upper part of the frame 14, and the orbiting scroll is provided. Ring 10 can revolve the orbiting scroll 10 only when driven by external force. The orbiting scroll 10 is tightly pressed onto the frame 14 by the fixed scroll 11, and the fixed scroll 11 is fixed on the frame 14 by the driven stopper piece 19, and is fixed by the driven stopper piece 19. The orbiting scroll 10 and the fixed scroll 11 are provided with a orbiting scroll wrap 20 and a fixed scroll wrap 21, respectively, and a plurality of compression chambers are formed therebetween. The interior of the case 22 is fixed to the high-pressure storage chamber and the low-pressure storage chamber by the isolation block 12, and one perforation 26 is provided in the middle of the isolation block 12 so that these two storage chambers are connected to each other. They are communicating. After the low-pressure working fluid is sucked into the compression chamber from the suction port b, the working fluid pressed by the continuous revolution of the orbiting scroll 10 is discharged from the discharge port c penetrating through the center of the fixed scroll 11, and then the case The high-pressure working fluid is discharged from the compressor 22 through the air outlet pipe 23.

According to the present invention, a seal ring 24 and an elastic part 26, for example, a spring made of a metal material are installed between the fixed scroll 11 and the isolation block 12. The orbiting scroll 10 is disposed at the upper end of the discharge port c of the fixed scroll 11, the elastic component 25 is disposed below the seal ring 24, and the seal ring 24 is perforated at the bottom of the isolation block 12 by the elasticity of the elastic component 25. 26, one sealing member 27 is provided on the outer wall of the seal ring 24. When the compressor starts up, the upper and lower portions of the seal ring 24 are both at low pressure, and the seal ring 24 is urged upward by the small elasticity of the elastic part 25 to generate high pressure in the compression chamber. Advantageously, when a high pressure builds up in the compression chamber, the seal ring 24 is pushed upward by the high pressure in the compression chamber, thus achieving a sealing effect at high or low pressure.

[0011]

[Effect of the invention]

 The present invention eliminates the need to align the center of the perforation 26 of the isolation block 12 with the centers of the orbiting scroll 10, the fixed scroll 11 and the frame 14 by using the sealing structure constituted by the seal ring 24 and the elastic part 25. The manufacturing cost is also reduced by reducing the difficulty of manufacturing and assembling, reducing the manufacturing cost, and enabling the isolation block 12 to be easily manufactured by pressure molding by making the perforation 26 of the isolation block 12 shorter. I have.

As described above, the present invention has improved the drawbacks of the conventional scroll compressor, and can be said to be a very novel, inventive and practical device.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the operation principle of a known scroll compressor.

FIG. 2 is a diagram illustrating the operation principle of a known scroll compressor.

FIG. 3 is a cross-sectional view of a known scroll compressor.

FIG. 4 is a cross-sectional view of the scroll compressor according to the present invention.

FIG. 5 is a sectional view of the seal device of the scroll compressor according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Orbiting scroll 11 Fixed scroll 12 Isolation block 13 Oldham ring 14 Frame 15 Crankshaft 16 Motor rotor 17 Motor stator 18 Fitting wheel 19 Follower stopper 20 Orbiting scroll wrap 21 Fixed scroll wrap 22 Case 23 Outlet pipe 24 Seal ring 25 Elastic parts 26 Perforated hole 27 Seal member 1 orbiting scroll 2 fixed scroll 3 isolation block 4 perforation 5 seal member 6 frame a working fluid b suction port c discharge port

Claims (3)

[Utility model registration claims] 1. Fixed scroll 11, orbiting scroll 1
0 and an isolation block 12, the fixed scroll 11
Is provided with a spiral fixed scroll wrap 21 and a discharge port in the center, and the orbiting scroll 10 is provided with a orbiting scroll wrap 20 and forms a plurality of compression chambers with the fixed scroll 11 to be driven by an external force. The low-pressure working fluid sucked into the compression chamber from the suction port without revolving due to the revolving motion is compressed by the continuous revolving and is discharged to the high pressure state from the discharge port of the fixed scroll 11, and the isolated block 12
Are housed in a case 22 of the scroll compressor, divide the inside of the case 22 into a high-pressure housing chamber and a low-pressure housing chamber, and form a perforation 2 in the isolation block 12 communicating with the high-pressure housing chamber and the low-pressure housing chamber.
6, a seal ring 24 and an elastic component 25 are provided between the fixed scroll 11 and the isolation block 12, and the seal ring 24 and the elastic component 25 are provided at the upper end of the discharge port of the fixed scroll 11. The elastic part 25 is provided on the
And the seal ring 24 is pushed upward by the elasticity of the elastic part 25 to favor the formation of high pressure in the compression chamber,
The seal ring 24 is formed by the high pressure gas formed in the compression chamber.
A sealing device for a scroll compressor, which is configured to perform sealing at high pressure and low pressure by being pushed upward. 2. The scroll compressor according to claim 1, wherein the seal ring is made of a metal material. 3. The seal device for a scroll compressor according to claim 1, wherein one seal member 27 can be provided on an outer wall of the seal ring 24.