JPH08226396A - Scroll comprssor - Google Patents

Abstract

PURPOSE: To provide a scroll compressor which has a good sealing property between high- and low-pressure chambers. CONSTITUTION: A diaphragm 16, which forms a high-pressure chamber 23 between it and the end face plate 13 of a closed container 1 in which is provided a fixed scroll 3 that together with an orbiting scroll 2 forms a compression chamber 14, and which forms a low-pressure chamber 24 between it and the fixed scroll 3, is provided. A sealing material 18 one end face of which overlaps with the edge of an opening 17 in the diaphragm 16 on the side of the low- pressure chamber 24 and the other end of which is opposed to the step 15 of the fixed scroll 3 is provided, and a seal ring 21 made of an elastic material is provided between the fixed scroll 3 and the sealing material 18. The seal ring 21 is placed in contact with the side face of the third step 15 of the fixed scroll 3 while having a diameter greater than the diameter of the portion where the diaphragm 16 overlaps with the sealing material 18. Therefore, the required sealing property can be secured easily even when the accuracy of the associated members of the sealing material 18 or the like is low.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor provided with an orbiting scroll and a fixed scroll and used as a compressor such as a refrigerator and an air conditioner.

[0002]

2. Description of the Related Art FIG. 14 shows, for example, JP-A-63-8008.
FIG. 15 is a longitudinal sectional view of a conventional scroll compressor shown in Japanese Patent Publication No. 8; FIG. 15 is an enlarged view of a main part of FIG. 14; and FIGS. 16 to 18 are views corresponding to FIG. 15 for explaining the assembly accuracy of the scroll compressor. . In the figure, (1) is a closed container, (2) is an orbiting scroll provided with a spiral portion and is placed in the closed container (1), (3) is a fixed scroll, and the end of the closed container (1) A spiral portion is provided near the portion and has a spiral direction opposite to the spiral portion of the orbiting scroll (2), and is combined with the spiral portion of the orbiting scroll (2) to form a compression chamber.

(4) is a leaf spring provided in the closed container (1)
A mounting plate that supports the fixed scroll (3) through (5), (6)
14 is a piston configured on the upper surface of the fixed scroll (3) in FIG. 14, and (7) is a piston configured on the end surface of the closed container (1).
The cylinder fitted in (6), (8) is arranged in the groove on the outer circumference of the piston (6), and is slidably provided between the fitting parts of the piston (6) and the cylinder (7). It is a sealing material.

(9) is a high-pressure space formed by the piston (6) and the cylinder (7). (10) is a low-pressure space formed in the closed container (1) and separated from the high-pressure space (9) by the sealing material (8). Reference numeral (11) is an electric motor provided in the closed container (1) and having a crankshaft (12) for driving the orbiting scroll (2).

The conventional scroll compressor is constructed as described above, and the oscillating scroll (2) is driven by energizing the electric motor (11), and the oscillating scroll (2) and the fixed scroll (3) are respectively Gas is pressure-fed from the low-pressure space (10) to the high-pressure space (9) by the relative movement of the swirl part.

The fixed scroll (3) is elastically supported in the closed container (1) through the leaf spring (5) and the mounting plate (4).
On the other hand, fixed scroll by high pressure gas in high pressure space (9)
(3) is pressed downward in FIG. 14 so that the fixed scroll (3) and the orbiting scroll (2) do not separate from each other during operation.

Further, the high pressure space (9) and the low pressure space (10) are separated by a seal material (8) slidably provided between the fitting portions of the piston (6) and the cylinder (7). There is. Therefore, even if the fixed scroll (3) is displaced in the direction along the length of the crankshaft (12), the downward pressing force of the fixed scroll (3) by the high-pressure gas in the high-pressure space (9) does not change, and is always a predetermined value. The pressing force of is applied.

[0008]

In the conventional scroll compressor as described above, the piston (6) and the cylinder (7) are
Are slidable with respect to each other, and the high pressure space (9) and the low pressure space (10) are sealed by a seal material (8). Therefore, it is necessary to assemble the piston (6) and the cylinder (7) to each other with a high degree of coaxiality, that is, the degree of coaxiality A shown in FIG. Therefore, it is necessary to assemble the coaxiality of the piston (6) and the opening of the mounting plate (4), that is, the coaxiality B shown in FIG. 17, with high accuracy.

For this reason, it is necessary to increase the manufacturing accuracy of both the piston (6) and the mounting plate (4) as a single body and the assembly accuracy of the both. Also, it is necessary to assemble the mounting plate (4) and the closed container (1) and the coaxiality of the closed container (1) and the cylinder (7), that is, the coaxiality C shown in FIG. 18 with high precision. For this purpose, it is necessary to increase the manufacturing accuracy of each of the mounting plate (4), the closed container (1) and the cylinder (7) as a single body, and the assembly accuracy between the three.

In such a structure, in order to improve the coaxiality between the related members, the manufacturing precision of each of the related members is improved,
Moreover, it is necessary to assemble the related members to each other with a required accuracy. However, there has been a problem that the improvement of these precisions requires a complicated procedure and a great deal of cost. Further, when the accuracy of the coaxiality of the related member is low, the degree of sealing between the piston (6) and the cylinder (7) is reduced. Therefore, there is a problem that the high-pressure gas leaks from the high-pressure space (9) to the low-pressure space (10) and the required performance of the scroll compressor cannot be obtained.

In addition, the seal material is provided in the groove on the outer periphery of the piston (6).
In order to insert (8), it is conceivable that a sealing surface (8) made of a hard material is provided with a split surface, or the sealing material (8) is made of an elastic material such as an O-ring. However, although the sealing material (8) made of a hard material is excellent in assembling property and slidability, it is likely to leak due to the split surface. In addition, elastic sealing material
In the case of (8), leakage is reduced but slidability is deteriorated.
Also, the leakage between the piston (6) and the cylinder (7) is an important factor that determines the performance of the scroll compressor.
If it gets worse, the discharge temperature rises and operation becomes impossible.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a scroll compressor having a simple structure and a good sealing property between a high pressure chamber and a low pressure chamber.

[0013]

In a scroll compressor according to the present invention, an orbiting scroll provided with a spiral portion and arranged in a closed container, and an end face plate of the closed container provided in the closed container. Between the scroll scroll and the orbiting scroll, and the spiral scroll of the orbiting scroll in the opposite direction to that of the scroll scroll is combined with the scroll of the orbiting scroll to form a compression chamber. An electric motor provided with a crankshaft for driving the orbiting scroll, and a high pressure chamber formed between the end face plate and the end face plate provided in the closed container to form a high pressure chamber, A partition plate forming a low-pressure chamber and a through hole are provided between the partition plate and the low-pressure chamber side.The end face of one side overlaps the opening edge of the partition plate and the other side faces the stepped portion of the fixed scroll. Was placed And Lumpur body, one side is disposed between the fixed scroll and the seal body is in contact with the side surface of the seal body,
The other side is provided with a seal ring made of an elastic material, which is disposed in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body.

Further, in the scroll compressor according to the present invention, the orbiting scroll provided with the spiral portion and arranged in the closed container, and the end face plate of the closed container and the orbiting scroll provided in the closed container. And a fixed scroll that forms a compression chamber by combining the spiral part of the orbiting scroll with the spiral part in the opposite direction to the spiral part of the orbiting scroll, and a fixed scroll that is provided in a closed container. A motor having a crankshaft for driving the dynamic scroll, a high pressure chamber is formed between the end face plate and the end face plate, which is provided between the end face plate and the fixed scroll provided in the closed container, and a low pressure chamber between the fixed scroll and the end face plate. And the partition plate that forms a through hole and is arranged on the low-pressure chamber side.The end surface of one side overlaps the opening edge of the partition plate, and the other side faces the stepped portion of the fixed scroll and approaches the partition plate. The cone Is disposed between the seal body having the outer surface formed of and the fixed scroll and the seal body, one side is in contact with the outer surface of the seal body, and the other side is larger than the diameter dimension of the overlapping portion between the partition plate and the seal body. A seal ring made of an elastic material is provided so as to be in contact with the side surface of the fixed scroll step portion due to its diameter.

Further, in the scroll compressor according to the present invention, the orbiting scroll provided with the spiral portion and arranged in the closed container, and the end face plate of the closed container and the orbiting scroll provided in the closed container. And a fixed scroll that forms a compression chamber by combining the spiral part of the orbiting scroll with the spiral part in the opposite direction to the spiral part of the orbiting scroll, and a fixed scroll that is provided in a closed container. A motor having a crankshaft for driving the dynamic scroll, a high pressure chamber is formed between the end face plate and the end face plate, which is provided between the end face plate and the fixed scroll provided in the closed container, and a low pressure chamber between the fixed scroll and the end face plate. And the partition plate that forms a through hole and is arranged on the low-pressure chamber side.The end surface of one side overlaps the opening edge of the partition plate, and the other side faces the stepped portion of the fixed scroll and approaches the partition plate. The cone Is disposed between the seal body having the outer surface formed of and the fixed scroll and the seal body, one side is in contact with the outer surface of the seal body, and the other side is larger than the diameter dimension of the overlapping portion between the partition plate and the seal body. A seal ring made of an elastic material, which is provided in contact with the side surface of the fixed scroll step portion according to the diameter dimension, and an elastic member arranged between the seal ring and the fixed scroll are provided.

Further, in the scroll compressor according to the present invention, the orbiting scroll provided with the spiral portion and arranged in the closed container, and the end face plate of the closed container and the orbiting scroll provided in the closed container. And a fixed scroll that forms a compression chamber by combining the spiral part of the orbiting scroll with the spiral part in the opposite direction to the spiral part of the orbiting scroll, and a fixed scroll that is provided in a closed container. A motor having a crankshaft for driving the dynamic scroll, a high pressure chamber is formed between the end face plate and the end face plate, which is provided between the end face plate and the fixed scroll provided in the closed container, and a low pressure chamber between the fixed scroll and the end face plate. And a partition plate that forms a through hole and is arranged on the low-pressure chamber side. The end surface of one side overlaps the opening edge of the partition plate and the conical surface on the other side of which the swing scroll side of the fixed scroll spreads. From Located between the fixed scroll and the seal body and the seal body with the inner surface facing the stepped portion, one side is in contact with the inner surface of the seal body, and the other side is the diameter of the overlapping point between the partition plate and the seal body. A seal ring made of an elastic material is provided so as to contact the surface of the fixed scroll step portion with a diameter dimension larger than the dimension.

Further, in the scroll compressor according to the present invention, the orbiting scroll provided with the spiral portion and arranged in the closed container, and the end face plate of the closed container and the orbiting scroll provided in the closed container. And a fixed scroll that forms a compression chamber by combining the spiral part of the orbiting scroll with the spiral part in the opposite direction to the spiral part of the orbiting scroll, and a fixed scroll that is provided in a closed container. A motor having a crankshaft for driving the dynamic scroll, a high pressure chamber is formed between the end face plate and the end face plate, which is provided between the end face plate and the fixed scroll provided in the closed container, and a low pressure chamber between the fixed scroll and the end face plate. And the partition plate that forms a through hole and is arranged on the low-pressure chamber side.The end surface of one side overlaps the opening edge of the partition plate, and the other side faces the stepped portion of the fixed scroll and approaches the partition plate. The cone With the outer surface is formed consisting,
A seal body having a flange portion formed so as to project outward from the outer surface and having an outer edge portion facing the upper surface of the step portion of the fixed scroll, and is disposed between the fixed scroll and the seal body, and one side is the outer surface of the seal body. On the other side, a seal ring made of an elastic material is provided on the other side so as to be in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body.

Further, in the scroll compressor according to the present invention, the orbiting scroll provided with the spiral portion and arranged in the closed container, and the end face plate of the closed container and the orbiting scroll provided in the closed container. And a fixed scroll that forms a compression chamber by combining the spiral part of the orbiting scroll with the spiral part in the opposite direction to the spiral part of the orbiting scroll, and a fixed scroll that is provided in a closed container. A motor having a crankshaft for driving the dynamic scroll, a high pressure chamber is formed between the end face plate and the end face plate, which is provided between the end face plate and the fixed scroll provided in the closed container, and a low pressure chamber between the fixed scroll and the end face plate. And the partition plate that forms a through hole and is arranged on the low-pressure chamber side.The end surface of one side overlaps the opening edge of the partition plate, and the other side faces the stepped portion of the fixed scroll and approaches the partition plate. The cone With the outer surface is formed consisting,
A seal body having a flange portion projecting outward from the outer surface and having an outer edge portion facing the stepped portion inner surface of the fixed scroll, and arranged between the fixed scroll and the seal body, one side being the outer surface of the seal body. On the other side, a seal ring made of an elastic material is provided on the other side so as to be in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body.

Further, in the scroll compressor according to the present invention, the orbiting scroll provided with the spiral portion and arranged in the closed container, and the end face plate of the closed container and the orbiting scroll provided in the closed container. And a fixed scroll that forms a compression chamber by combining the spiral part of the orbiting scroll with the spiral part in the opposite direction to the spiral part of the orbiting scroll, and a fixed scroll that is provided in a closed container. A motor having a crankshaft for driving the dynamic scroll, a high pressure chamber is formed between the end face plate and the end face plate, which is provided between the end face plate and the fixed scroll provided in the closed container, and a low pressure chamber between the fixed scroll and the end face plate. And a partition plate that forms a through hole and is arranged on the low-pressure chamber side, the end surface of one side overlaps the opening edge of the partition plate, and the other side is arranged to face the stepped portion of the fixed scroll. With seal body Placed between the fixed scroll and the seal body, one side is in contact with the side surface of the seal body, and the other side is in contact with the side surface of the fixed scroll stepped portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body. A seal ring made of an elastic material is provided, and a discharge valve that is arranged corresponding to the through hole of the seal body and is closed by the pressure on the high pressure chamber side is provided.

[0020]

In the scroll compressor configured as described above, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the seal plate is displaced by the displacement of the partition plate. In addition, the seal ring elastically deforms and follows, so that the sealing performance of the seal body and the seal ring is maintained.

Further, in the scroll compressor constructed as described above, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate causes the sealing member to move. Is displaced and follows.
Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained.

Further, in the scroll compressor configured as described above, when the fixed scroll is displaced to an abnormally high pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate causes the sealing member to move. Is displaced and follows.
Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. Further, the seal ring is pressed toward the partition plate by the elastic member between the seal ring and the fixed scroll.

Further, in the scroll compressor constructed as described above, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate causes the sealing member to move. Is displaced and follows.
Further, the seal ring having the inner surface of the conical surface where the oscillating scroll side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained.

Further, in the scroll compressor constructed as described above, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate causes the sealing member to move. Is displaced and follows.
Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. In addition, the flange portion that is formed so as to project outward from the outer surface formed of the conical surface of the seal body and faces the upper surface of the step portion of the fixed scroll prevents deviation of the seal ring caused by thermal deformation or the like.

Further, in the scroll compressor constructed as described above, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate causes the sealing member to move. Is displaced and follows.
Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. Further, the flange portion that is formed so as to project outward from the outer surface formed of the conical surface of the seal body and faces the inner surface of the step portion of the fixed scroll prevents deviation displacement of the seal ring caused by thermal deformation or the like.

Further, in the scroll compressor configured as described above, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate causes the sealing member to move. Is displaced, and the seal ring is elastically deformed and follows, so that the sealing performance by the seal body and the seal ring is maintained. Further, the discharge valve provided corresponding to the through hole of the seal body is closed when the scroll compressor is stopped, and the high pressure chamber is maintained in a high pressure state.

[0027]

【Example】

Example 1. 1 to 3 are views showing an embodiment of the present invention, FIG. 1 is a vertical sectional view, FIG. 2 is an enlarged view schematically showing a scroll portion of FIG. 1, and FIG. 3 is a partition plate in FIG. It is a corresponding figure explaining the sealing state of a seal body. In the figure,
(1) is a closed container provided with an end face plate (13), (2) is an orbiting scroll provided with a spiral portion and is placed in the closed container (1), (3) is a fixed scroll, a closed container (1) A spiral part is provided near the end of the orbiting scroll (2) in the opposite winding direction to the spiral part of the orbiting scroll (2). 14) is formed.

(6) is a piston constituted by forming a step portion (15) on the upper surface of the fixed scroll (3) in FIG. 1, and (16) is provided in the closed container (1) and fixed scroll (3 ) And end plate
A partition plate arranged between (13) and having an opening (17) at the center. (18) is a seal body provided with a through hole (19), the upper surface of the flange portion (20) on one side is superposed on the lower edge of the opening (17) of the partition plate (16), and the like. The piston is on the side
The side surface of the piston (6) faces the inner surface of the step (15) of the piston (6).

Reference numeral (21) is a seal ring made of an elastic material such as a synthetic resin material interposed between the piston (6) and the seal body (18), and the outside is the inner surface of the stepped portion (15) of the piston (6). And is provided in contact with the outer surface of the seal body (18) facing the stepped portion (15) of the piston (6). Reference numeral (22) is a valve cover arranged above the seal body (18), and (23) is a high-pressure chamber formed by the partition plate (16), the seal body (18) and the end plate (13).

(24) is a high pressure chamber formed in the closed container (1)
It is a low-pressure chamber separated by (23), the seal body (18) and the seal ring (21). Reference numeral (11) is an electric motor provided in the closed container (1) and having a crankshaft (12) for driving the orbiting scroll (2).

In the scroll compressor configured as described above, the orbiting scroll (2) is driven by energizing the electric motor (11), and each of the orbiting scroll (2) and the fixed scroll (3) is driven. Gas is pressure-fed from the low-pressure chamber (24) to the high-pressure chamber (23) by the relative movement of the spiral portion.

Even if the fixed scroll (3) is displaced in the direction along the axis of the crankshaft (12) due to abnormally high pressure in the compression chamber (14) due to liquid compression or the like, the seal ring (21) and the seal body (18) )
Also, the high and low pressure seal is secured without being separated from the partition plate (16). This allows for fixed scrolls (3) during operation
And the orbiting scroll (2) do not separate from each other. Further, as shown in FIG. 2, the partition plate (16) and the seal body (18)
The diameter of the sealing surface of is φA, and the piston (6) step (15)
And the diameter of the sealing surface of the seal ring (21) is φB,
The seal body (18) and the seal ring (21) are formed in the relationship of φB> φA.

Therefore, when the fixed scroll (3) is displaced in the direction along the axis of the crankshaft (12) due to abnormally high pressure in the compression chamber (14) due to liquid compression or the like, the fixed scroll (3) is in contact with the partition plate (16). Thus, the seal body (18) is displaced, and the seal ring (21) is elastically deformed with respect to the displacement of the partition plate (16). This allows partition boards
The seal body (18) and the seal ring (21) correspond to the displacement of (16). Therefore, even when the partition plate (16) is displaced due to the pressure change in the high pressure chamber (23), the tightness between the high pressure chamber (23) and the low pressure chamber (24) can be maintained.

The partition plate (16) and the seal surface of the seal body (18) are formed by overlapping each other on a plane orthogonal to the axis of the crankshaft (12). For this reason, the partition plate
Even when the coaxiality between the opening (17) of the (16) and the seal body (18) is bad such as the coaxiality D shown in FIG. 3, the seal body (18) is the partition plate.
Since it is pressed against the (16) and comes into contact with it, the hermeticity can be easily maintained. Further, since the seal ring (21) is made of an elastic material, it is elastically deformed following the displacement of the seal body (18).

As a result, the partition plate (16), the seal body (18),
Even if the manufacturing accuracy of the related members such as the piston (6) and the stepped portion (15) and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. In this way, with a simple structure that can be easily manufactured, the partition plate can be changed by the pressure change of the high pressure chamber (23).
Even if the (16) is displaced, the hermeticity between the high pressure chamber (23) and the low pressure chamber (24) can be maintained. Therefore, it is possible to manufacture a scroll compressor having a required compression performance with high productivity and at low cost.

Example 2. FIG. 4 is a view showing another embodiment of the present invention, which corresponds to FIG. 2 described above, and a scroll compressor is configured in the same manner as the embodiment shown in FIGS. In the figure, the same symbols as in FIG.
Is an outer surface formed of a conical surface formed on the lower side of the flange portion (20) of the seal body (18) and spreading upward. (21) is the piston
A seal ring made of an elastic material such as a synthetic resin material, which is interposed between the seal (6) and the seal body (18), and the step (1) of the piston (6) is on the outside.
5) The inner surface is in contact with the inner surface, and the inner surface is in contact with the outer surface (25) of the piston (6) of the seal body (18).

Also in the embodiment of FIG. 4, the orbiting scroll (2) is driven by urging the electric motor (11),
Gas is pressure-fed from the low-pressure chamber (24) to the high-pressure chamber (23) by the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3).

Then, the piston (6) of the fixed scroll (3), the partition plate (16) and the seal body (1
8) and the seal ring (21) are arranged. Therefore, although detailed description is omitted, it is obvious that the same operation as that of the embodiment of FIGS. 1 to 3 can be obtained in the embodiment of FIG.

Further, in the embodiment of FIG. 4, the outer surface (25) of the seal body (18) and the corresponding surface of the seal ring (21) with the outer surface (25) are formed by a conical surface whose upper side expands. For this reason,
When the compression chamber (14) becomes abnormally high pressure due to liquid compression, etc., and the fixed scroll (3) is displaced in the direction along the axis of the crankshaft (12), a wedge action due to the conical surface is produced in proportion to the pressing force. The sealing action between the seal body (18) and the seal ring (21) becomes stronger. Therefore, it is possible to obtain a more stable sealing action between the high pressure chamber (23) and the low pressure chamber (24).

Example 3. FIG. 5 is also a view corresponding to FIG. 4 described above showing another embodiment of the present invention, and the scroll compressor is configured in the same manner as the embodiment of FIGS. 1 to 3 described above except FIG. In the figure, the same symbols as in FIG. 4 indicate the corresponding parts, and (26)
Is the underside of the seal ring (21) and the fixed scroll (3) piston (6)
An annular elastic member provided between the upper surfaces of the parts, the radial cross section of which is formed in an arc shape with the lower side opened.

Also in the embodiment of FIG. 5, the orbiting scroll (2) is driven by urging the electric motor (11),
Gas is pressure-fed from the low-pressure chamber (24) to the high-pressure chamber (23) by the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3).

The piston (6) of the fixed scroll (3), the partition plate (16), the seal body (18) and the seal ring (21) are arranged as in the embodiment of FIGS. 1 to 3 and FIG. Has been done. Therefore, although detailed description is omitted, it is apparent that the embodiment of FIG. 5 can also obtain the same operation as the embodiment of FIGS. 1 to 3 and FIG.

In the embodiment of FIG. 5, the elastic member (26) is provided between the lower surface of the seal ring (21) and the upper surface of the fixed scroll (3) piston (6). Therefore, the seal ring (21) is pressed upward by the elastic member (26), and the partition plate (while the pressure difference between the high pressure chamber (23) and the low pressure chamber (24) is generated when the scroll compressor is started ( It is possible to avoid a lack of hermeticity between 16) and the seal body (18).

As a result, a stable sealing property between the partition plate (16) and the seal body (18) can be obtained, start-up failure due to insufficient sealing property can be prevented, and a scroll compressor with high operational reliability can be obtained. You can The elastic member (26) in FIG.
General wave washers and disc springs can be used and can be easily commercialized.

Example 4. FIG. 6 is also a view corresponding to FIG. 2 showing another embodiment of the present invention, and the scroll compressor is configured similarly to the embodiment of FIGS. 1 to 3 except for FIG. In the figure, the same symbols as in FIG. 2 indicate the corresponding parts, and (15)
Is a stepped portion formed on the upper part of the piston (6) and formed of a conical surface whose lower side expands. (21) is piston (6) and seal body
A seal ring made of an elastic material such as a synthetic resin material interposed between (18), the outer side of which is in contact with the inner surface of the flange portion (20) of the seal body (18) and the inner side of which is the stepped portion of the piston (6). It is provided in contact with the conical surface of (15).

Also in the embodiment shown in FIG. 6, the orbiting scroll (2) is driven by urging the electric motor (11),
Gas is pressure-fed from the low-pressure chamber (24) to the high-pressure chamber (23) by the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3).

As in the embodiment shown in FIGS. 1 to 3, the piston (6) of the fixed scroll (3), the partition plate (16) and the seal body (1
8) and the seal ring (21) are arranged. Therefore, although detailed description is omitted, it is apparent that the same operation as that of the embodiment of FIGS. 1 to 3 can be obtained in the embodiment of FIG.

In the embodiment of FIG. 6, the stepped portion (15) of the piston (6) and the corresponding surface of the seal ring (21) with the stepped portion (15) are formed by a conical surface whose lower side expands. There is. Therefore, when the compression chamber (14) becomes abnormally high pressure due to liquid compression or the like, and the fixed scroll (3) is displaced in the direction along the axis of the crankshaft (12), the wedge action by the conical surface is proportional to the pressing force. Accordingly, the sealing action between the seal body (18) and the seal ring (21) becomes stronger. Therefore, it is possible to obtain a more stable sealing action between the high pressure chamber (23) and the low pressure chamber (24).

Example 5. FIG. 7 is also a view corresponding to FIG. 4 described above showing another embodiment of the present invention, and the scroll compressor is configured similarly to the embodiments of FIGS. 1 to 3 described above except FIG. 7. In the figure, the same symbols as in FIG. 4 indicate the corresponding parts, and (20)
Is a flange portion formed on the lower part of the seal body (18) so as to project outward from the outer surface (25) consisting of a conical surface with an upwardly widened surface, the outer edge of which is the step of the fixed scroll (3) piston (6). It is provided so as to face the upper surface of the portion (15).

Also in the embodiment of FIG. 7, the orbiting scroll (2) is driven by urging the electric motor (11),
Gas is pressure-fed from the low-pressure chamber (24) to the high-pressure chamber (23) by the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3).

1 to 3 and the embodiment of FIG. 4, the piston (6) of the fixed scroll (3), the partition plate (16), the seal body (18) and the seal ring (21) are arranged. Has been done. Therefore, although detailed description is omitted, it is clear that the embodiment of FIG. 7 can also obtain the same operation as the embodiment of FIGS. 1 to 3 and FIG.

Further, in the embodiment shown in FIG. 7, the flange portion (20) of the seal body (18) is formed so as to project outward from the outer surface (25) formed of a conical surface on the lower side of which the upper side expands. ,
The outer edge portion is arranged to face the upper surface of the stepped portion (15) of the fixed scroll (3) piston (6). For this reason, in the seal ring (21) made of a fluororesin or the like having good slidability, the deviation of the seal ring (21) from the predetermined position caused by thermal deformation, pressure deformation, creep deformation, etc.
It can be prevented by the upper end of the stepped portion (15) between the piston (6) and the piston (6).

As a result, the seal ring (21) made of a fluororesin or the like having good slidability is fixed to the fixed scroll (3).
It is possible to prevent a failure caused by deviation from between the piston (6) and the seal body (18).

Example 6. FIG. 8 is also a view corresponding to FIG. 4 described above showing another embodiment of the present invention, and the scroll compressor is configured in the same manner as the embodiment shown in FIGS. In the figure, the same symbols as in FIG. 4 indicate the corresponding parts, and (20)
Is a flange portion formed on the lower part of the seal body (18) so as to project outward from the outer surface (25) consisting of a conical surface with an upwardly widened surface, the outer edge of which is the step of the fixed scroll (3) piston (6). It is retired from the inner surface of the part (15).

Reference numeral (21) is a seal ring made of an elastic material such as a synthetic resin material interposed between the piston (6) and the seal body (18), and the outside is the stepped portion (15) of the piston (6). It is arranged at a position in contact with the inner surface and lower than the upper end of the step portion (15), and the inner side is provided in contact with the outer surface (25) which is a conical surface where the upper side of the seal body (18) expands.

Also in the embodiment shown in FIG. 8, the orbiting scroll (2) is driven by urging the electric motor (11),
Gas is pressure-fed from the low-pressure chamber (24) to the high-pressure chamber (23) by the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3).

1 to 3 and the piston (6) of the fixed scroll (3), the partition plate (16), the seal body (18) and the seal ring (21) are arranged as in the embodiment of FIG. Has been done. Therefore, although detailed description is omitted, it is clear that the embodiment of FIG. 8 can also obtain the same operation as the embodiment of FIGS. 1 to 3 and FIG.

Further, in the embodiment shown in FIG. 8, the seal ring (21) is arranged at a position lower than the upper end of the stepped portion (15) of the piston (6). Therefore, in the seal ring (21) made of fluororesin or the like having good slidability, the seal ring (21) caused by thermal deformation, pressure deformation, creep deformation, etc.
The deviation from the predetermined position beyond the upper end of the stepped portion (15) of the piston (6) is prevented by the flange portion (20) of the seal body (18).

As a result, the seal ring (21) made of fluororesin or the like having good slidability is fixed to the fixed scroll (3).
It is possible to prevent a failure caused by deviation from between the piston (6) and the seal body (18).

Example 7. 9 to 11 are views showing another embodiment of the present invention, in which FIG. 9 corresponds to FIG.
11 and FIG. 11 are views for explaining the operating condition of the discharge valve in FIG. 9, respectively, and the scroll compressor is configured in the same manner as the embodiment of FIGS. 1 to 3 and FIG. 4 except for FIG. In the figure, the same symbols as those in FIG. 4 indicate the corresponding parts, and (27)
Is a recess provided on the surface of the seal body (18) facing the fixed scroll (3), and (28) is a discharge valve that is arranged in the recess (27) and faces the convex portion of the fixed scroll (3). is there.

Also in the embodiment shown in FIGS. 9 to 11, the electric motor is used.
The orbiting scroll (2) is driven by urging the (11). Then, due to the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3), the low pressure chamber (2
Gas is pumped from the 4) to the high pressure chamber (23).

1 to 3 and the piston (6) of the fixed scroll (3), the partition plate (16), the seal body (18) and the seal ring (21) are arranged as in the embodiment of FIG. Is also a seal body
(18) A surface of the outer surface (25) corresponding to the seal ring (21) is formed by a conical surface whose upper side expands. Therefore, although detailed description is omitted, in the embodiments of FIGS.
It is obvious that the same effect as the embodiment of FIGS. 3 and 4 can be obtained.

In the embodiment shown in FIGS. 9 to 11, the discharge valve (28) between the seal body (18) and the fixed scroll (3) is closed by the pressure in the high pressure chamber (23) when the scroll compressor is stopped. To do. Therefore, even when the scroll compressor is stopped, the pressure in the high pressure chamber (23) is kept the same as during operation. Therefore, when the scroll compressor restarts, the high pressure chamber (2
3) Energy loss for increasing pressure, that is, ON
-OFF loss can be reduced.

Further, in the embodiment shown in FIGS. 9 to 11, the discharge valve (28) is arranged in the recess (27) provided on the surface of the seal body (18) facing the fixed scroll (3). The valve cover (22) described later is unnecessary. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced.

Further, in the embodiment of FIGS. 9 to 11, the discharge valve (28) is opened and closed once for each rotation of the scroll compressor, but the discharge valve (28) is opened only when the scroll compressor is stopped. Even if the discharge valve (28) functions as a check valve, it is possible to reduce the energy loss due to the pressure increase in the high pressure chamber (23) when the scroll compressor is restarted. it can.

When the scroll compressor is stopped, the outlet of the compression chamber (14) is closed by the discharge valve (28). Therefore, even if the pressure inside the compression chamber (14) becomes an intermediate pressure, the space surrounded by the seal body (18) and the fixed scroll (3) is maintained in a high pressure state. Further, the seal body (18) remains pressed by the partition plate (16), the high pressure chamber (23) becomes high pressure, and the low pressure chamber (24).
Are held at low pressure respectively.

Example 8. 12 and 13 are views showing another embodiment of the present invention. FIG. 12 is a schematic view showing the scroll portion of FIG.
12 is a diagram for explaining the operating condition of the discharge valve in FIG. 12, and the scroll compressor is configured in the same manner as the above-described embodiment of FIGS. 1 to 3 except for FIGS. 12 and 13. In the drawings, the same reference numerals as those in FIGS. 1 to 3 indicate corresponding parts, and (28) is a discharge valve arranged in a valve cover (22) arranged above the seal body (18). ) It is arranged so as to face the upper convex portion.

Also in the embodiment shown in FIGS. 12 and 13, the orbiting scroll (2) is urged by urging the electric motor (11).
Is driven. Then, gas is pressure-fed from the low pressure chamber (24) to the high pressure chamber (23) by the relative movement of the spiral portions of the orbiting scroll (2) and the fixed scroll (3).

Then, the piston (6) of the fixed scroll (3), the partition plate (16), the seal body (1
8) and the seal ring (21) are arranged. Therefore, although detailed description is omitted, it is apparent that the same effects as those of the embodiments of FIGS. 1 to 3 can be obtained in the embodiments of FIGS. 12 and 13.

Further, in the embodiment of FIGS. 12 and 13, the discharge valve (28) inside the valve cover (22) on the upper surface of the seal body (18).
Is blocked when the scroll compressor is stopped. This allows
When the compression chamber (14) has an intermediate pressure, the pressure in the low pressure chamber (24) surrounded by the seal body (18) and the fixed scroll (3) also becomes an intermediate pressure.

When the compression chamber (14) becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll (3) is displaced in the direction along the axis of the crankshaft (12), the high pressure gas flows into the low pressure space for a short period of time. Over time, the high pressure space and the low pressure space become balanced intermediate pressures. Therefore, also in the embodiment of FIGS. 12 and 13, the same operation as that of the embodiment of FIGS. 9 to 11 can be obtained.

[0072]

As described above, according to the present invention, the fixed scroll which is arranged in the closed container and is combined with the orbiting scroll to form the compression chamber, and the fixed scroll is arranged between the end plate and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. A seal body that overlaps with the edge portion and the other side is arranged to face the stepped portion of the fixed scroll, and is arranged between the fixed scroll and the seal body so that one side is in contact with the side surface of the seal body and the other side is the above. A seal ring made of an elastic material is provided so as to be in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body.

As a result, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the partition plate is displaced to displace the seal body and elastically deform the seal ring. Then, the sealing performance of the seal body and the seal ring is maintained. As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, as described above, the present invention is arranged between the fixed scroll arranged in the closed container and combined with the orbiting scroll to form the compression chamber, and between the end plate of the closed container and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. A seal body that overlaps the edge of the part and has an outer surface that is a conical surface that faces the stepped portion of the fixed scroll and that expands toward the partition plate on the other side, and is disposed between the fixed scroll and the seal body. In contact with the side surface of the seal body, the other side was provided with a seal ring made of an elastic material arranged in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body. It is a thing.

As a result, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate follows the displacement of the seal body. Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, the outer surface of the seal body and the corresponding surface of the seal ring with the outer surface are formed by a conical surface whose side closer to the partition plate expands. Therefore, when the partition plate is pressed toward the fixed scroll side due to the pressure increase in the high-pressure chamber, the sealing action between the seal body and the seal ring becomes stronger with a wedge action by the conical surface in proportion to the pressing force. . Therefore, there is an effect of further stabilizing the hermeticity maintaining action between the high pressure chamber and the low pressure chamber.

Further, as described above, the present invention is arranged between the fixed scroll arranged in the closed container and combined with the orbiting scroll to form the compression chamber, and between the end plate of the closed container and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. A seal body that overlaps the edge of the part and has an outer surface that is a conical surface that faces the stepped portion of the fixed scroll and that expands toward the partition plate on the other side, and is disposed between the fixed scroll and the seal body. A seal ring made of an elastic material, which is in contact with the side surface of the seal body and is in contact with the side surface of the fixed scroll step portion on the other side by a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body, and this seal Ring and fixed It is provided with a resilient member disposed between the crawl.

As a result, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate follows the displacement of the seal body. Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. Further, the seal ring is pressed toward the partition plate by the elastic member between the seal ring and the fixed scroll. As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, the outer surface of the seal body and the corresponding surface of the seal ring with this outer surface are formed by a conical surface whose side closer to the partition plate expands. Therefore, when the partition plate is pressed toward the fixed scroll side due to the pressure increase in the high-pressure chamber, the sealing action between the seal body and the seal ring becomes stronger with a wedge action by the conical surface in proportion to the pressing force. . Therefore, there is an effect of further stabilizing the hermeticity maintaining action between the high pressure chamber and the low pressure chamber.

Further, the seal ring is pressed toward the partition plate by the elastic member between the seal ring and the fixed scroll.
For this reason, it is possible to avoid insufficient sealing performance between the partition plate and the seal body before the pressure difference between the high pressure chamber and the low pressure chamber is established when the scroll compressor is started. Therefore, there is an effect that a stable sealing property between the partition plate and the seal body is obtained, a start-up failure due to insufficient sealing property is prevented, and a scroll compressor having high operation reliability is obtained.

As described above, the present invention is arranged between the fixed scroll arranged in the closed container and combined with the orbiting scroll to form the compression chamber, and between the end plate of the closed container and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. It is arranged between the fixed scroll and the seal body, and the seal body having an inner surface facing the stepped portion formed by a conical surface that overlaps with the edge of the part and spreads the swing scroll side of the fixed scroll on the other side. One side was in contact with the inner surface of the seal body, and the other side was provided with a seal ring made of an elastic material arranged in contact with the fixed scroll step portion surface with a diameter dimension larger than the diameter dimension of the partition plate and the sealing body. Thing .

As a result, when the compression chamber has an abnormally high pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate follows the displacement of the seal body. Further, the seal ring having the inner surface of the conical surface where the oscillating scroll side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained.
As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, the stepped portion of the fixed scroll and the inner surface of the seal ring facing the stepped portion are formed by the conical surface where the oscillating scroll side is widened. Therefore, when the partition plate is pressed toward the fixed scroll side due to the pressure increase in the high-pressure chamber, the sealing action between the seal body and the seal ring becomes stronger with a wedge action by the conical surface in proportion to the pressing force. . Therefore, there is an effect of further stabilizing the hermeticity maintaining action between the high pressure chamber and the low pressure chamber.

Further, as described above, the present invention is arranged between the fixed scroll arranged in the closed container and combined with the orbiting scroll to form the compression chamber, and between the end plate of the closed container and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. An outer surface is formed on the other side that is a conical surface that overlaps the edge of the fixed scroll and that faces the stepped portion of the fixed scroll and spreads toward the partition plate. Between the fixed scroll and the seal body, which has a flange part facing the upper surface of the step part of the, and one side is in contact with the outer surface of the seal body, and the other side is the diameter of the overlapping point between the partition plate and the seal body. From dimensions It is provided with a a sealing ring made of arranged elastic material in contact with the fixed scroll step portion side by larger diameter.

As a result, when the compression chamber becomes abnormally high in pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate follows the displacement of the seal body. Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, the outer surface of the seal body and the corresponding surface of the seal ring with the outer surface are formed by a conical surface whose side closer to the partition plate expands. Therefore, when the partition plate is pressed toward the fixed scroll side due to the pressure increase in the high-pressure chamber, the sealing action between the seal body and the seal ring becomes stronger with a wedge action by the conical surface in proportion to the pressing force. . Therefore, there is an effect of further stabilizing the hermeticity maintaining action between the high pressure chamber and the low pressure chamber.

Further, the flange portion which is formed so as to project outward from the outer surface formed of the conical surface of the seal body and faces the upper surface of the step portion of the fixed scroll prevents deviation of the seal ring caused by thermal deformation or the like. For this reason, there is an effect that the failure caused by the seal ring made of a fluororesin or the like having good slidability deviating from between the fixed scroll and the seal body is prevented.

Further, as described above, the present invention is arranged between the fixed scroll arranged in the closed container and combined with the orbiting scroll to form the compression chamber, and between the end plate of the closed container and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. An outer surface is formed on the other side that is a conical surface that overlaps the edge of the fixed scroll and that faces the stepped portion of the fixed scroll and spreads toward the partition plate. Located between the fixed scroll and the seal body and the seal body having a flange portion facing the inner surface of the step portion, one side is in contact with the outer surface of the seal body, and the other side is the diameter of the overlapping point between the partition plate and the seal body. From dimensions It is provided with a a sealing ring made of arranged elastic material in contact with the fixed scroll step portion side by larger diameter.

As a result, when the compression chamber has an abnormally high pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the displacement of the partition plate follows the displacement of the seal body. Further, the seal ring having the outer surface formed of the conical surface where the partition plate side spreads is elastically deformed and follows, and the sealing performance by the seal body and the seal ring is maintained. As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, the outer surface of the seal body and the corresponding surface of the seal ring with this outer surface are formed by a conical surface whose side closer to the partition plate expands. Therefore, when the partition plate is pressed toward the fixed scroll side due to the pressure increase in the high-pressure chamber, the sealing action between the seal body and the seal ring becomes stronger with a wedge action by the conical surface in proportion to the pressing force. . Therefore, there is an effect of further stabilizing the hermeticity maintaining action between the high pressure chamber and the low pressure chamber.

Further, the flange portion, which is formed so as to project outward from the outer surface formed of the conical surface of the seal body and faces the inner surface of the step portion of the fixed scroll, prevents deviation of the seal ring caused by thermal deformation or the like. For this reason, there is an effect that the failure caused by the seal ring made of a fluororesin or the like having good slidability deviating from between the fixed scroll and the seal body is prevented.

Further, as described above, the present invention is arranged between the fixed scroll arranged in the closed container and combined with the orbiting scroll to form the compression chamber, and between the end plate of the closed container and the fixed scroll. A partition plate that forms a high-pressure chamber with the end face plate and a low-pressure chamber with the fixed scroll, and a through hole is provided on the low-pressure chamber side, and the partition plate is opened by one end face. It is placed between the fixed scroll and the seal body and the other side is in contact with the side surface of the seal body and the other side is a partition A seal ring made of an elastic material provided in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the plate and the seal body, and the high pressure chamber arranged corresponding to the through hole of the seal body. Closed due to side pressure It is provided with a and a discharge valve for.

As a result, when the compression chamber has an abnormally high pressure due to liquid compression or the like and the fixed scroll is displaced in the direction along the axis of the crankshaft, the partition body is displaced, the seal body is displaced, and the seal ring is elastically deformed. And the airtightness is maintained by the seal body and the seal ring. As a result, even if the manufacturing precision of the related members such as the partition plate, the seal body, and the fixed scroll and the assembly accuracy of the related members are low, the required sealing performance can be easily obtained. Therefore, there is an effect of facilitating the manufacture of the scroll compressor capable of maintaining the hermeticity between the high pressure chamber and the low pressure chamber when the pressure of the high pressure chamber changes.

Further, the discharge valve provided corresponding to the through hole of the seal body and closed by the pressure on the high pressure chamber side is closed when the scroll compressor is stopped, and the high pressure chamber is maintained in a high pressure state. As a result, even when the scroll compressor is stopped, the pressure in the high pressure chamber is kept the same as during operation. Therefore, there is an effect of reducing energy loss for increasing the pressure of the high pressure chamber when the scroll compressor is restarted.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view schematically showing a scroll portion of FIG.

3 is a view corresponding to FIG. 2 for explaining a sealed state of a partition plate and a seal body in FIG. 2.

FIG. 4 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 5 is a view corresponding to FIG. 4 showing a third embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 2 showing a fourth embodiment of the present invention.

FIG. 7 is a view corresponding to FIG. 4 showing a fifth embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 4 showing a sixth embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 4 showing a seventh embodiment of the present invention.

FIG. 10 is a diagram for explaining an operating state of the discharge valve in FIG.

FIG. 11 is a diagram for explaining another operation state of the discharge valve in FIG.

FIG. 12 is a view showing an eighth embodiment of the present invention and is a corresponding view schematically and enlarged showing the scroll portion of FIG. 1.

FIG. 13 is a view for explaining the operating condition of the discharge valve in FIG.

FIG. 14 is a vertical cross-sectional view of a conventional scroll compressor.

FIG. 15 is an enlarged view of a main part of FIG.

FIG. 16 is a diagram for explaining the assembly accuracy of the scroll compressor.
5 equivalent figure.

FIG. 17 is a view corresponding to FIG. 15 illustrating another assembly precision of the scroll compressor.

FIG. 18 is a view corresponding to FIG. 15 illustrating another assembly precision of the scroll compressor.

[Explanation of symbols]

1 closed container, 2 orbiting scroll, 3 fixed scroll, 11 electric motor, 12 crank shaft, 13 end face plate,
14 compression chambers, 15 step portions, 16 partition plates, 17 openings, 18 seal bodies, 19 through holes, 20 flange portions, 21 seal rings, 23 high pressure chambers, 24 low pressure chambers, 2
5 outer surface, 26 elastic members, 27 discharge valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Suzuki 3-18-1, Ogashi, Shizuoka City Mitsubishi Electric Corporation Shizuoka Manufacturing (72) Inventor Shoji Hagiwara 3-18-1, Oka Shizuoka Mitsubishi Electric Corporation Shizuoka Plant (72) Inventor Takeshi Fushiki 3-18-1, Oga, Shizuoka City Mitsubishi Electric Co., Ltd.Shizuoka Plant (72) Inventor Koichi Sato 3-18-1, Oga, Shizuoka City Mitsubishi Electric Co., Ltd. Shizuoka Plant

Claims (7)

[Claims] 1. An orbiting scroll provided with a spiral portion and arranged in a closed container; and an orbiting scroll provided in the closed container and arranged between an end face plate of the closed container and the orbiting scroll. A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber.The end surface of one side overlaps the opening edge portion of the partition plate, and the other side faces the stepped portion of the fixed scroll. Placed Of the base body and the fixed scroll and the seal body, one side of which is in contact with the side surface of the seal body, and the other side of which has a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body. And a seal ring made of an elastic material provided in contact with the side surface of the fixed scroll step portion. 2. An orbiting scroll provided with a spiral portion and arranged in a closed container, and an inside of the closed container, which is arranged between an end face plate of the closed container and the orbiting scroll. A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber. The end face of one side overlaps the edge of the opening of the partition plate, and the other side faces the stepped portion of the fixed scroll. Close to the partition plate above A seal body having an outer surface formed of a conical surface that spreads, and is disposed between the fixed scroll and the seal body so that one side is in contact with the outer surface of the seal body and the other side is the partition plate and the seal body. A scroll compressor provided with a seal ring made of an elastic material, which is provided in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion. 3. An orbiting scroll provided with a spiral portion and arranged in a closed container, and an orbiting scroll provided in the closed container and arranged between an end face plate of the closed container and the orbiting scroll. A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll that is provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber. The end face of one side overlaps the edge of the opening of the partition plate, and the other side faces the stepped portion of the fixed scroll. Close to the partition plate above A seal body having an outer surface formed of a conical surface that spreads, and is disposed between the fixed scroll and the seal body so that one side is in contact with the outer surface of the seal body and the other side is the partition plate and the seal body. A seal ring made of an elastic material provided in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of
A scroll compressor including the seal ring and an elastic member provided between the fixed scroll. 4. An orbiting scroll provided with a spiral portion and arranged in an airtight container; an orbiting scroll provided in the airtight container, arranged between an end face plate of the airtight container and the orbiting scroll; A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber. The end face on one side overlaps with the edge of the opening of the partition plate, and on the other side, the orbiting scroll of the fixed scroll. Widening A seal body having an inner surface facing a stepped portion formed of a conical surface, and the fixed scroll and the seal body are disposed between the one side and the inner surface of the seal body, and the other side is the partition plate. A scroll compressor comprising: a seal ring made of an elastic material, which is provided in contact with the fixed scroll step portion surface by a diameter dimension larger than a diameter dimension of a portion where the seal body overlaps. 5. An orbiting scroll provided with a spiral portion and arranged in an airtight container; an orbiting scroll provided in the airtight container, arranged between an end face plate of the airtight container and the orbiting scroll; A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber. The end face of one side overlaps the edge of the opening of the partition plate, and the other side faces the stepped portion of the fixed scroll. Close to the partition plate above And a fixed scroll and a seal body having an outer surface formed of a conical surface which spreads and having a flange portion projecting outward from the outer surface and having an outer edge portion facing the upper surface of the step portion of the fixed scroll. Is arranged between the body and one side is in contact with the outer surface of the seal body, and the other side is in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body. A scroll compressor provided with a seal ring made of elastic material. 6. An orbiting scroll provided with a spiral portion and arranged in a closed container, and an orbiting scroll provided in the closed container and arranged between an end face plate of the closed container and the orbiting scroll, A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber. The end face of one side overlaps the edge of the opening of the partition plate, and the other side faces the stepped portion of the fixed scroll. Close to the partition plate above And a fixed scroll and a seal body having an outer surface formed of a conical surface which spreads and having a flange portion projecting outward from the outer surface and having an outer edge portion facing the stepped portion inner surface of the fixed scroll. Is arranged between the body and one side is in contact with the outer surface of the seal body, and the other side is in contact with the side surface of the fixed scroll step portion with a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body. A scroll compressor provided with a seal ring made of elastic material. 7. An orbiting scroll provided with a spiral portion and arranged in an airtight container; an orbiting scroll provided in the airtight container, arranged between an end face plate of the airtight container and the orbiting scroll; A fixed scroll that forms a compression chamber by combining a spiral part of a spiral direction opposite to the spiral part of the orbiting scroll with the spiral part of the orbiting scroll; and a fixed scroll provided in the hermetic container to drive the orbiting scroll. Which has a crankshaft, and which is provided in the closed container and is disposed between the end plate and the fixed scroll to form a high pressure chamber between the end plate and the low pressure between the fixed scroll and the fixed scroll. A partition plate that forms a chamber and a through hole is provided and is arranged on the side of the low-pressure chamber.The end surface of one side overlaps the opening edge portion of the partition plate, and the other side faces the stepped portion of the fixed scroll. Placed Of the base body and the fixed scroll and the seal body, one side of which is in contact with the side surface of the seal body, and the other side of which has a diameter dimension larger than the diameter dimension of the overlapping portion of the partition plate and the seal body. A seal ring made of an elastic material provided in contact with the side surface of the fixed scroll step portion, and a discharge valve provided corresponding to the through hole of the seal body and closed by the pressure on the high pressure chamber side. Scroll compressor.