Scroll compressor

Abstract

To provide a scroll compressor exhibiting improved silence characteristics.SOLUTION: A scroll compressor 100 of the present invention includes a fixed scroll 1 having a first spiral blade 5 on a lower surface of a fixed baseboard 4, a floating scroll 2 having a second spiral blade 7 on an upper surface of a movable baseboard 6, and a support frame 3 joined with the fixed baseboard 4. An eccentric drive mechanism 104 for revolving the floating scroll 2 and a linear guide 106T for regulating the floating scroll 2 so as not to rotate are arranged inside the support frame 3, and a lower surface of the movable baseboard 6 and an upper surface of the linear guide 106T do not come into contact with each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a scroll compressor for improving quiet characteristics.

Background Art

[0002] As shown in FIG. 12, a conventional scroll compressor 500 is configured by meshing a first spiral blade 505 provided on the lower surface of a fixed substrate 504 of a fixed scroll 501 with a second spiral blade 507 provided on the upper surface of a movable substrate 506 of a floating scroll 502. The fixed scroll 501 and the floating scroll 502 are held by a support frame 503 so that the floating scroll 502 is in a movable state. Due to the revolution of the floating scroll 502, the compression chamber 508 formed between the spiral blades of both scrolls moves while decreasing in volume, thereby compressing the gas.

[0003] Inside the support frame 503, an eccentric drive mechanism 604 for revolving the floating scroll 502 and a linear guide portion 606T (anti-rotation mechanism) for restricting the floating scroll 502 from rotating are arranged. The eccentric drive mechanism 604 is configured by connecting between an eccentric shaft 528 provided on a pedestal portion 515 of the support frame 503 and the movable substrate 506 via the linear guide portion 606T.

[0004] Specifically, a linear guide portion 606T that is loosely fitted in a drive hole 519 formed in the pedestal portion 515 hangs integrally from the lower surface of the movable substrate 506. The linear guide portion 606T has a rectangular frame-shaped intermediate frame body 606. The intermediate frame body 606 includes a pair of opposing first wall portions (not shown) and a pair of opposing wall portions 606b that oppose each other along a direction orthogonal to this. A first linear guide is provided on the outer surface of the first wall portion, and a second linear guide 661b is provided on the inner surface of the pair of opposing second wall portions 606b.

Prior Art Documents

Patent Documents

[0005] Patent Document 1 Japanese Patent Application Laid-Open No. 2018-35708 Summary of the Invention Problems to be Solved by the Invention

[0006] In the scroll compressor 500 of Patent Document 1, since the upper surface of the linear guide portion 606T (intermediate frame 606) loosely fitted in the drive hole 519 formed in the pedestal portion 515 is in contact with the lower surface of the floating scroll 502, when the floating scroll 502 revolves, the intermediate frame 606 may vibrate. As a result, the vibration of the scroll compressor 500 increases, and there is a problem that the quietness characteristics of the scroll compressor 500 deteriorate.

[0007] Focusing on the above problems, an object of the present invention is to provide a scroll compressor with improved quietness characteristics. Means for Solving the Problems

[0008] In order to achieve the above object, the present invention takes the following means.

[0009] That is, the scroll compressor of the present invention includes a fixed scroll having a configuration in which a first spiral blade is provided on the lower surface of a fixed substrate, a floating scroll having a configuration in which a second spiral blade is provided on the upper surface of a movable substrate, and a support frame coupled to the fixed substrate. Inside the support frame, an eccentric drive mechanism for revolving the floating scroll and a linear guide portion for restricting the floating scroll from rotating are arranged, and the lower surface of the movable substrate and the upper surface of the linear guide portion are configured not to contact each other.

[0010] With this configuration, since the lower surface of the movable substrate and the upper surface of the linear guide portion are configured not to contact each other, when the floating scroll revolves, it is possible to prevent the linear guide portion from vibrating by contacting the floating scroll. Thereby, the vibration of the scroll compressor can be suppressed, and the quietness characteristics of the scroll compressor can be improved.

[0011] In this case, it is preferable that the support frame has a partition wall interposed between the lower surface of the movable substrate and the upper surface of the linear guide portion.

[0012] With this configuration, it is possible to ensure that the lower surface of the movable substrate and the upper surface of the linear guide portion do not come into contact with each other.

[0013] In this case, the movable substrate is disposed in a scroll accommodation hole formed in the support frame. When the movable substrate moves within the scroll accommodation hole and the end face of the movable substrate approaches the wall surface of the scroll accommodation hole, the gas between the end face of the movable substrate in the advancing direction of the movable substrate and the wall surface of the scroll accommodation hole preferably passes through the gap between the lower surface of the movable substrate and the upper surface of the linear guide portion and flows toward the space between the end face of the movable substrate on the opposite side of the advancing direction of the movable substrate and the wall surface of the scroll accommodation hole.

[0014] With this configuration, even when the movable substrate of the floating scroll moves within the scroll accommodation hole and the end face of the movable substrate approaches the wall surface of the scroll accommodation hole, the gas in the space between the end face of the movable substrate in the advancing direction of the movable substrate and the wall surface of the scroll accommodation hole flows toward the space between the end face of the movable substrate on the opposite side of the advancing direction of the movable substrate and the wall surface of the scroll accommodation hole through the gap between the lower surface of the movable substrate and the upper surface of the linear guide portion. Therefore, even when the movable substrate of the floating scroll moves within the scroll accommodation hole, it is possible to prevent the gas from being compressed between the end face of the movable substrate and the wall surface of the scroll accommodation hole. Thereby, it is possible to suppress the large vibration of the scroll compressor and improve the quietness characteristics.

[0015] In this case, a seal portion is provided between the pedestal portion of the support frame and the vicinity of the peripheral edge of the lower surface of the movable substrate. The seal portion is constituted by an O-ring seal, and it is preferable that an annular plate-like member is disposed between the lower surface of the movable substrate and the O-ring seal.

[0016] With such a configuration, it is possible to prevent wear of the O-ring seal and reduce the sliding resistance.

Advantages of the Invention

[0017] According to the present invention described above, it is possible to provide a scroll compressor with improved quiet characteristics.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Best Mode for Carrying Out the Invention

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] FIG. 1 is a cross-sectional perspective view showing a scroll compressor 100 in the present embodiment. FIG. 2 is a cross-sectional view of the scroll compressor 100 in FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2.

[0021] As shown in FIGS. 1 and 2, the scroll compressor 100 of the present embodiment has a structure in which a fixed scroll 1 made of, for example, an aluminum alloy and a floating scroll 2 which is a turning scroll also made of an aluminum alloy are combined and held by a support frame 3 also made of an aluminum alloy.

[0022] The fixed scroll 1 is configured by providing a first spiral blade 5 on the lower surface of a fixed substrate 4, and the floating scroll 2 is configured by providing a protruding second spiral blade 7 on the upper surface of a movable substrate 6. The first and second spiral blades 5 and 7 have a planar shape that can be relatively movably fitted as shown in FIG. 3. The outer peripheral end of the first spiral blade 5 is connected to a cylindrical outer peripheral wall 5a that surrounds the first spiral blade 5, and a spiral closed space is formed. The mutual arrangement of the floating scroll 2 and the fixed scroll 1 is set so that the second spiral blade 7 is engaged in this spiral closed space. By engaging the first spiral blade 5 and the second spiral blade 7, a compression chamber 8 is formed in the spiral closed space. As the floating scroll 2 revolves, the compression chamber 8 moves while reducing its volume, and the gas in the compression chamber 8 is compressed.

[0023] In the compression chamber 8 at the center of the fixed scroll 1, a discharge path vertical portion 9 extending vertically upward through the fixed substrate 4 is open. The discharge path vertical portion 9 communicates with a discharge path horizontal portion 10 extending horizontally through the fixed substrate 4. The discharge path horizontal portion 10 is open at the peripheral edge of the fixed substrate 4, and a discharge port 11 is provided. From the discharge port 11, the gas compressed in the compression chamber 8 is supplied to the outside.

[0024] Although shown only in Fig. 3, an intake path vertical portion 12 extending vertically upward through the fixed substrate 4 is open at the outer peripheral end of the spiral closed space formed by the first spiral blade 5 and the cylindrical outer peripheral wall 5a. The intake path vertical portion 12 communicates with an intake path horizontal portion 13 extending horizontally through the fixed substrate 4. The intake path horizontal portion 13 is open at the peripheral edge of the fixed substrate 4, and an intake port 14 is provided. To the intake port 14, a gas to be compressed, for example, air, is supplied.

[0025] In the middle of the spiral closed space, an intermediate pressure extraction path vertical portion 101 communicating with a predetermined position of the compression chamber 8 set between the intake path vertical portion 12 and the discharge path vertical portion 9 is open. To this intermediate pressure extraction path vertical portion 101, an intermediate pressure extraction path horizontal portion 102 extending horizontally through the fixed substrate 4 is communicated. The intermediate pressure extraction path horizontal portion 102 is open at the peripheral edge of the fixed substrate 4, and an intermediate pressure extraction port 103 is provided.

[0026] The support frame 3 shown in Figs. 1 and 2 has a pedestal portion 15 and an upper cylindrical portion 16 extending above the pedestal portion 15. The pedestal portion 15 of the support frame 3 is supported by a lower cylindrical portion 17 disposed below it. The floating scroll 2 is held on the pedestal portion 15 via an eccentric drive mechanism 104 to be rotatable inside the upper cylindrical portion 16, and the upper end portion of the upper cylindrical portion 16 is coupled to the fixed substrate 4.

[0027] The inside of the upper cylindrical portion 16 forms a cylindrical scroll accommodation hole 18, and at the upper part of the scroll accommodation hole 18, a cylindrical outer peripheral wall 5a protruding downward from the fixed substrate 4 of the fixed scroll 1 is fitted.

[0028] As shown in FIGS. 1 and 5, an upwardly open annular groove 151a is formed on the upper surface of the pedestal portion 15 inside the scroll receiving hole 18, and an O-ring seal 151 is embedded therein to form a seal portion. Inside the seal portion, a partition wall 50 that projects horizontally inward in the radial direction is provided. The partition wall 50 is a plate-like member having a predetermined thickness, and an opening 50a is formed in the central portion thereof.

[0029] As shown in FIGS. 1 and 5, a rectangular drive hole 19 is provided below the partition wall 50 of the pedestal portion 15. The drive hole 19 includes a pair of first inner walls 19a at one opposing position and a pair of second inner walls 19b at the other opposing position. An eccentric shaft 28 integrally provided at the upper end of the drive shaft 105 is disposed in the drive hole 19.

[0030] As shown in FIGS. 2 and 7, a back pressure introduction path vertical portion 20 extending vertically downward opens at the peripheral edge of the pedestal portion 15. The back pressure introduction path vertical portion 20 communicates with a back pressure introduction path horizontal portion 21 extending horizontally in the pedestal portion 15. The back pressure introduction path horizontal portion 21 opens at the peripheral edge of the pedestal portion 15, and a back pressure introduction port 22 is provided. The back pressure introduction port 22 is connected to the intermediate pressure extraction port 103 of the fixed scroll 1 described above via an external flow path 103a, thereby forming a back pressure introduction mechanism, and the pressure of the gas in the compression process in the compression chamber 8 is introduced into a pressure chamber 23 described later.

[0031] As shown in FIG. 7, the upper surface 15x of the pedestal portion 15 inside the O-ring seal 151 is slightly lower than the upper surface 15y of the peripheral edge portion of the pedestal portion 15, and a gap δ is provided between the lower surface of the movable substrate 6 and the upper surface of the pedestal portion 15, forming the pressure chamber 23. The above-described back pressure introduction path vertical portion 20 opens into the pressure chamber 23.

[0032] Outside the O-ring seal 151 surrounding the pressure chamber 23, an oil lubrication mechanism shown in FIG. 7 is provided. This oil lubrication mechanism connects an oil introduction path vertical portion 152a that opens to the upper surface 15y of the peripheral edge of the pedestal portion 15 and an oil introduction path horizontal portion 152b that extends horizontally in the pedestal portion 15. The oil introduction path horizontal portion 152b opens to the peripheral edge of the pedestal portion 15 and is provided with an oil introduction port 152c. At a position facing the outer peripheral end surface of the movable substrate 6 on the inner circumference of the upper cylindrical portion 16 constituting the support frame 3, an oil discharge path horizontal portion (not shown) opens. This oil discharge path extends horizontally and opens to the peripheral edge of the pedestal portion 15 and is provided with an oil discharge port (not shown). The oil discharge port is connected to the oil introduction port 152c and an oil circulation path (not shown).

[0033] As shown in FIGS. 4 and 6, the eccentric drive mechanism 104 is configured by connecting between an eccentric shaft 105 provided on the pedestal portion 15 and the movable substrate 6 via an anti-rotation mechanism. Specifically, the anti-rotation mechanism includes a linear guide portion 106T disposed in a drive hole 19 provided in the pedestal portion 15 and an eccentric shaft connecting member 108 that integrally hangs down from the lower surface of the movable substrate 6. The eccentric shaft connecting member 108 is fitted into the linear guide portion 106T.

[0034] The linear guide portion 106T has an intermediate frame body 106 into which the eccentric shaft connecting member 108 is fitted. The intermediate frame body 106 includes a pair of opposed first wall portions 106a and a pair of opposed wall portions 106b that face each other along a direction orthogonal thereto. A first linear guide 161a is provided on the outer surface of the first wall portion 106a, and a second linear guide 161b is provided on the inner surface of the pair of opposed second wall portions 106b.

[0035] As shown in FIG. 8, each of the linear guides 161a and 161b has a minute roller 161y disposed in each opening 161x of a thin frame 161 having a ladder shape. The minute roller 106y is axially attached to the frame 161 about an axis orthogonal to the arrangement direction of the openings 106x, and is detachably attached to the corresponding wall portions 106a and 106b of the intermediate frame body 106 under an appropriate engagement structure. Grease is applied to the axially attached portion of the minute roller 161y.

[0036] The eccentric shaft connecting member 108 in the shape of a rectangular block into which the intermediate frame body 106 is fitted includes a pair of opposed first wall portions 108a and a pair of opposed wall portions 108b opposed along a direction orthogonal thereto.

[0037] As shown in FIG. 4, on the inner circumference of the intermediate frame body 106, the eccentric shaft connecting member 108 is mounted such that its first outer wall 108a faces the first wall portion 106a of the intermediate frame body 106, and its second outer wall 108b faces the second wall portion 106b of the intermediate frame body 106. Specifically, the first outer wall 108a is loosely fitted to the first wall portion 106a of the intermediate frame body 106, and the second outer wall 108b is closely mounted to the second wall portion 106b of the intermediate frame body 106 via the second linear guide 161b. The eccentric shaft connecting member 108 has a bearing 107 for mounting an eccentric shaft 28 on its inner circumference.

[0038] Then, the intermediate frame body 106 is mounted with respect to the drive hole 19 such that the first inner wall 19a faces the first wall portion 106a and the second inner wall 19b faces the second wall portion 106b. Specifically, the first wall portion 106a is closely mounted to the first inner wall 19a via the first linear guide 161a, and the second wall portion 106b is loosely fitted to the second inner wall 19b.

[0039] When the intermediate frame 106 of the linear guide portion 106T is connected to the eccentric shaft 28 via the eccentric shaft connecting member 108 by the eccentric drive mechanism 104 configured as described above, the intermediate frame 106 can move in the X direction along the first linear guide 161a with respect to the pedestal 15 as shown in FIGS. 6(a) to (d) (particularly FIGS. 6(a) and (c)). The eccentric shaft connecting member 108 can move in the Y direction along the second linear guide 161b with respect to the intermediate frame 106 as shown in FIGS. 6(a) to (d) (particularly FIGS. 6(b) and (d)). By combining these operations, the eccentric shaft connecting member 108 can freely move in the X-Y plane without rotating with respect to the pedestal 15. When the axis of the drive shaft 15 is Ta and the axis of the eccentric shaft 28 is Tb, when the eccentric shaft 28 rotates around the axis AT of the drive shaft 15, accordingly, the eccentric shaft connecting member 108 can revolve without rotating the floating scroll 2 while following the rotation of the eccentric shaft 28.

[0040] As shown in FIG. 1, a bearing 171 for supporting the drive shaft 15 is arranged on the support member 3a, and the lower end of the drive shaft 15 is connected to a motor output shaft 180 protruding from the motor box.

[0041] The operation of the scroll compressor 100 having the above configuration is as follows. That is, the rotation of the motor output shaft 180 is transmitted to the eccentric shaft 28 via the drive shaft 105, and the axis Tb of the eccentric shaft 28 orbits around the axis Ta of the drive shaft 105. As a result, the eccentric shaft connecting member 108 attached to the eccentric shaft 28 via the bearing 107 follows the axis Tb of the eccentric shaft 28 and revolves around the axis Ta of the drive shaft 105 in the drive hole 19 without rotating via the second linear guide 161b, the frame-like member 106, and the first linear guide 161a. As a result, the floating scroll 2 integrated with the eccentric shaft connecting member 108 also revolves without rotating, and due to this revolving motion, gas is compressed in the compression chamber 8 based on the action of the well-known scroll compressor 100.

[0042] The compressed high-pressure gas is supplied to the outside from the discharge port 11, and a part of the gas in the compression process in the compression chamber 8 is supplied to the pressure chamber 23 through the intermediate pressure extraction port 103 and the back pressure introduction port 22, and the pressure in the pressure chamber 23 rises. Due to the pressure in the pressure chamber 23, a biasing force acting toward the fixed scroll 1 acts on the floating scroll 2. Also, a force based on the pressure in the compression chamber 8 acts on the floating scroll 2 in a direction away from the fixed scroll 1. Therefore, according to the balance of both forces, the relative position of the floating scroll 2 with respect to the pedestal portion 15 is determined, and the floating scroll 2 is supported in a floating state.

[0043] Here, when the scroll compressor 100 is started, the gas in the compression chamber 8 moves to the pressure chamber 23 through the intermediate pressure extraction port 103 and the back pressure introduction port 22. However, when it enters the steady state, the movement of the gas almost stops and only pressure transmission occurs, and the loss of the compressed gas becomes negligible. And since the gas pressure in the compression process takes an extremely stable value if the rotation speed of the motor output shaft 180 does not change, compared with the case where a part of the compressed gas discharged from the discharge port 11 is pressure-adjusted by a regulator and guided to the back pressure introduction port 22, the torque and thus the compression ratio also become stable. Also, the intermediate pressure to be used can be freely set by where to open the intermediate pressure extraction path vertical portion 101 along the compression direction, and moreover, if the intermediate pressure extraction path vertical portion 101 is processed at the same position, it becomes possible to mass-produce the scroll compressor 100 with the same back pressure with high accuracy.

[0044] The structure of the support frame 3 of the scroll compressor 100 of the present embodiment will be described with reference to FIG. 9. FIG. 9(a) is a perspective view when the support frame 3 is viewed from an upper oblique direction, and FIG. 9(b) is a perspective view when the support frame 3 is viewed from a lower oblique direction.

[0045] As described above, the support frame 3 has a pedestal portion 15 and an upper cylindrical portion 16 extending upward therefrom. As shown in FIG. 9(a), a cylindrical scroll accommodation hole 18 is formed inside the upper cylindrical portion 16 of the support frame 3. An upwardly open annular groove 151a is formed on the upper surface of the pedestal portion 15 inside the scroll accommodation hole 18, and an O-ring seal 151 is embedded therein. Inside the seal portion, a partition wall 50 that projects horizontally inward in the radial direction is provided. Below the partition wall 50 of the pedestal portion 15, as shown in FIG. 9(b), a rectangular drive hole 19 is provided. The drive hole 19 includes a pair of first inner walls 19a at one opposing position and a pair of second inner walls 19b at the other opposing position.

[0046] When assembling the scroll compressor 100 of the present embodiment, as shown in FIG. 10, after the O-ring seal 151 is embedded in the annular groove 151a of the upper cylindrical portion 16 from above the support frame 3, the floating scroll 2 is disposed in the scroll accommodation hole 18 of the upper cylindrical portion 16 from above the support frame 3. Further, the linear guide portion 106T is disposed in the drive hole 19 of the pedestal portion 15 from below the support frame 3. At this time, the linear guide portion 106T is fitted to the eccentric shaft connecting member 108 of the floating scroll 2.

[0047] Thereby, the lower surface of the movable substrate 6 of the floating scroll 2 contacts the upper surface of the partition wall 50 of the pedestal portion 15. Further, the upper surface of the linear guide portion 106T (intermediate frame body 106) contacts the lower surface of the partition wall 50 of the pedestal portion 15. Therefore, the partition wall 50 of the pedestal portion 15 is disposed between the lower surface of the movable substrate 6 of the floating scroll 2 and the upper surface of the linear guide portion 106T (intermediate frame body 106). Thus, the lower surface of the movable substrate 6 of the floating scroll 2 and the upper surface of the linear guide portion 106T (intermediate frame body 106) are configured not to contact each other.

[0048] In a conventional scroll compressor 500, when the movable substrate 506 of the floating scroll 502 moves within the scroll housing hole 518, the end face of the movable substrate 506 approaches the wall surface of the scroll housing hole 518 in its traveling direction. Then, in the conventional scroll compressor 500, since the lower surface of the movable substrate 506 is in contact with the upper surface of the linear guide portion 606T, the gas between the end face of the movable substrate 506 and the wall surface of the scroll housing hole 518 cannot flow out to the outside. Therefore, the gas is compressed between the end face of the movable substrate 506 and the wall surface of the scroll housing hole 518. As a result, the conventional scroll compressor 500 vibrates greatly and the quietness characteristics deteriorate.

[0049] On the other hand, in the scroll compressor 100 of the present embodiment, the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T are not in contact. Therefore, even when the movable substrate 6 of the floating scroll 2 moves within the scroll housing hole 18 and the end face of the movable substrate 6 approaches the wall surface of the scroll housing hole 18, the gas in the space between the end face of the movable substrate 6 in the traveling direction of the movable substrate 6 and the wall surface of the scroll housing hole 18 flows through the gap between the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T to the space between the end face of the movable substrate 6 on the side opposite to the traveling direction of the movable substrate 6 and the wall surface of the scroll housing hole 18. Therefore, even when the movable substrate 6 of the floating scroll 2 moves within the scroll housing hole 18, it is possible to prevent the gas from being compressed between the end face of the movable substrate 6 and the wall surface of the scroll housing hole 18. As a result, it is possible to suppress the scroll compressor 100 of the present embodiment from vibrating greatly and improve the quietness characteristics.

[0050] As described above, the scroll compressor 100 of the present embodiment includes a fixed scroll 1 having a configuration in which a first spiral blade 5 is provided on the lower surface of a fixed substrate 4, a floating scroll 2 having a configuration in which a second spiral blade 7 is provided on the upper surface of a movable substrate 6, and a support frame 3 coupled to the fixed substrate 4. Inside the support frame 3, an eccentric drive mechanism 104 for revolving the floating scroll 2 and a linear guide portion 106T for restricting the floating scroll 2 from rotating are arranged, and the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T are configured not to contact each other.

[0051] With this configuration, since the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T are configured not to contact each other, when the floating scroll 2 revolves, it is possible to prevent the linear guide portion 106T from vibrating by contacting the floating scroll 2. Thereby, the vibration of the scroll compressor 100 can be suppressed, and the quietness characteristics of the scroll compressor 100 can be improved.

[0052] In the scroll compressor 100 of the present embodiment, the support frame 3 has a partition wall 50 interposed between the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T.

[0053] With this configuration, it is possible to surely configure the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T not to contact each other.

[0054] In the scroll compressor 100 of the present embodiment, the movable substrate 6 is disposed in a scroll accommodation hole 18 formed in the support frame 3. When the movable substrate 6 moves in the scroll accommodation hole 18 and the end surface of the movable substrate 6 approaches the wall surface of the scroll accommodation hole 18, the gas between the end surface of the movable substrate 6 in the advancing direction of the movable substrate 6 and the wall surface of the scroll accommodation hole 18 passes through the gap between the lower surface of the movable substrate 6 and the upper surface of the linear guide portion 106T and flows toward the space between the end surface of the movable substrate 6 on the side opposite to the advancing direction of the movable substrate 6 and the wall surface of the scroll accommodation hole 18.

[0055] With such a configuration, even when the movable substrate 6 of the floating scroll 2 moves within the scroll accommodation hole 18, it is possible to prevent gas from being compressed between the end face of the movable substrate 6 and the wall surface of the scroll accommodation hole 18. Thereby, it is possible to suppress large vibrations of the scroll compressor 100 and improve the quietness characteristics.

[0056] As described above, although one embodiment of the present invention has been described, the specific configuration of each part is not limited to the above-described embodiment only, and various modifications are possible without departing from the spirit of the present invention.

[0057] For example, in the above embodiment, by disposing the partition wall 50 of the pedestal portion 15 between the lower surface of the movable substrate 6 of the floating scroll 2 and the upper surface of the linear guide portion 106T, the lower surface of the movable substrate 6 of the floating scroll 2 and the upper surface of the linear guide portion 106T (intermediate frame 106) are configured not to contact each other, but it is not limited thereto. In the present invention, the same effect can be obtained as long as the lower surface of the movable substrate 6 of the floating scroll 2 and the upper surface of the linear guide portion 106T (intermediate frame 106) are configured not to contact each other.

[0058] In the above embodiment, a part of the gas in the compression process in the compression chamber 8 is supplied to the pressure chamber 23 via the intermediate pressure extraction port 103 and the back pressure introduction port 22, and a biasing force acting on the floating scroll 2 toward the fixed scroll 1 acts, but it is not limited thereto. The present invention is also applicable to a scroll compressor in which a biasing force acting on the floating scroll 2 toward the fixed scroll 1 does not act by a part of the gas in the compression process in the compression chamber 8.

[0059] In the above embodiment, the movable substrate 6 of the floating scroll 2 is arranged to contact the O-ring seal 151 embedded in the annular groove 151a formed on the upper surface of the pedestal portion 15, but it is not limited thereto. For example, an annular plate-like member 160 may be disposed between the movable substrate 6 of the floating scroll 2 and the O-ring seal 151 as shown in FIG. 11. The annular plate-like member 160 is, for example, a member made of metal. In this case, it is possible to prevent wear of the O-ring seal and reduce the sliding resistance.

[0060] In the above embodiment, the pressure chamber is sealed by arranging the O-ring seal 151 embedded in the annular groove 151a formed on the upper surface of the pedestal portion 15, but the present invention is not limited thereto. For example, two annular grooves may be formed on the upper surface of the pedestal portion 15, and the pressure chamber may be sealed by arranging two O-ring seals embedded in the two annular grooves respectively.

Explanation of reference numerals

[0061] 1... Fixed scroll 2... Floating scroll 3... Support frame 4... Fixed substrate 5... First spiral blade 6... Movable substrate 7... Second spiral blade 8... Compression chamber 15... Pedestal portion 18... Scroll accommodation hole 23... Pressure chamber 104... Eccentric drive mechanism 105... Eccentric shaft 106T... Linear guide portion 106... Intermediate frame body 108... Eccentric shaft connecting member 161a... First linear guide 161b... Second linear guide 100... Scroll compressor

Claims

1. A fixed scroll having a configuration in which a first scroll vane is provided on the lower surface of a fixed substrate, A floating scroll having a configuration in which a second scroll vane is provided on the upper surface of a movable substrate, A support frame coupled to the fixed substrate, Inside the support frame, An eccentric drive mechanism for revolving the floating scroll, A linear guide portion for restricting the floating scroll from rotating is arranged, A scroll compressor, characterized in that the lower surface of the movable substrate and the upper surface of the linear guide portion are configured not to contact each other.

2. The scroll compressor according to claim 1, characterized in that the support frame has a partition wall interposed between the lower surface of the movable substrate and the upper surface of the linear guide portion.

3. The movable substrate is arranged in a scroll accommodation hole formed in the support frame, When the movable substrate moves in the scroll accommodation hole and the end face of the movable substrate approaches the wall surface of the scroll accommodation hole, the gas between the end face of the movable substrate in the advancing direction of the movable substrate and the wall surface of the scroll accommodation hole passes through the gap between the lower surface of the movable substrate and the upper surface of the linear guide portion and flows toward the space between the end face of the movable substrate on the side opposite to the advancing direction of the movable substrate and the wall surface of the scroll accommodation hole. The scroll compressor according to claim 1 or 2, characterized in that it does so.

4. A seal portion is provided between the pedestal portion of the support frame and the vicinity of the peripheral edge of the lower surface of the movable substrate, The seal portion is constituted by an O-ring seal, The scroll compressor according to claim 1 or 2, characterized in that an annular plate-like member is arranged between the lower surface of the movable substrate and the O-ring seal.

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