Scroll type fluid machine

Abstract

The invention provides a scroll fluid machine capable of improving workability of connection between a discharge tube of a fixed scroll member and a discharge pipe or a joint. A scroll compressor is provided with: a fixed scroll member (11) having an end plate (17), a scroll coil (18), a cooling fin (19), and a discharge cylinder (20); an orbiting scroll member (12) having an end plate (25) and a wrap (26); a drive shaft (13) that rotates the orbiting scroll member (12) with respect to the fixed scroll member (11); and a fixed cover (24) attached to the tip side of the cooling fins (19) of the fixed scroll member (11). A discharge cylinder (20) of the fixed scroll member (11) extends from an end plate (17) of the fixed scroll member (11) across an inner surface of a fixed cover (24).

Description

Technical Field

[0001] The present invention relates to a scroll type fluid machine. Background Art

[0002] Patent document 1 discloses a scroll compressor as one of scroll fluid machines. The scroll compressor has a fixed scroll component, a rotating scroll component, and a drive shaft that rotates the rotating scroll component relative to the fixed scroll component. The fixed scroll component has an end plate and a spiral vortex ring that is integrally formed with the end plate and is erected on one side of the end plate. The rotating scroll component has an end plate and a spiral vortex ring that is integrally formed with the end plate and is erected on one side of the end plate in a manner opposite to the fixed scroll component.

[0003] A plurality of working chambers are formed between the vortex of the fixed scroll component and the vortex of the orbiting scroll component. As the orbiting scroll component rotates, each working chamber moves and its volume decreases, thereby compressing the gas.

[0004] The fixed scroll component also has a discharge tube that is integrally formed with the end plate and is erected on the opposite side of the end plate. The discharge tube of the fixed scroll component has, for example, an internal threaded portion that is screwed into the external threaded portion of the discharge pipe and is connected to the discharge pipe. The discharge tube of the fixed scroll component and the discharge pipe connected thereto discharge the gas compressed by the above-mentioned working chamber.

[0005] The fixed scroll component also has a plurality of cooling fins integrally formed with the end plate and erected on the opposite side of the end plate. A fixed cover is installed on the front end side of the plurality of cooling fins, and cooling air flows in a flow path formed by the plurality of cooling fins and the fixed cover. Thus, the fixed scroll component is cooled.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2006-017013 Summary of the invention

[0009] Technical problem to be solved by the invention

[0010] The discharge tube of the fixed scroll component of Patent Document 1 has a lower height than the cooling fins arranged around it, and does not extend to the inner surface of the fixed cover or go over the inner surface. Therefore, if the fixed cover is not removed, the connection state of the discharge tube of the fixed scroll component and the discharge pipe cannot be visually confirmed, and the operation of connecting them is not easy. In the process of increasing demand for labor saving, a structure that is easier to maintain is required.

[0011] The present invention has been made in view of the above circumstances, and one of the objects thereof is to improve the workability of connecting the discharge cylinder of the fixed scroll component and the discharge pipe or the joint.

[0012] Technical solutions to solve problems

[0013] In order to solve the above-mentioned problems, the structure described in the scope of the application claims is used. The present invention includes multiple technical solutions for solving the above-mentioned problems. As an example, a scroll fluid machinery includes: a fixed scroll component, which has an end plate, a scroll-shaped vortex ring formed integrally with the end plate and upright on one side of the end plate, and a plurality of cooling fins formed integrally with the end plate and upright on the opposite side of the end plate; a rotating scroll component, which has an end plate, a scroll-shaped vortex ring formed integrally with the end plate and upright on one side of the end plate in a manner opposite to the fixed scroll component; a driving force that causes the rotating scroll component to rotate relative to the fixed scroll component. A moving shaft; and a fixed cover installed on the front end side of the plurality of cooling fins of the fixed scroll component, using a plurality of working chambers formed between the vortex of the fixed scroll component and the vortex of the rotating scroll component to change the pressure of the gas, the fixed scroll component also having a discharge tube, which is integrally formed with the end plate and uprightly arranged on the opposite side of the end plate, to discharge the gas whose pressure is changed by the working chamber, the discharge tube of the fixed scroll component extends from the end plate of the fixed scroll component to the inner surface of the fixed cover or extends in a manner that exceeds the inner surface.

[0014] Effects of the Invention

[0015] According to the present invention, it is possible to improve the workability of connecting the discharge cylinder of the fixed scroll component and the discharge pipe or the joint.

[0016] In addition, problems, structures, and effects other than those described above will become clear from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view showing the structure of a scroll compressor according to the first embodiment to which the present invention is applied.

[0018] Figure 2 It is a cross-sectional view showing the structure of a scroll compressor according to a first embodiment to which the present invention is applied.

[0019] Figure 3 It is a side view showing the structure of a fixed scroll component and a fixed cover in a first embodiment to which the present invention is applied.

[0020] Figure 4 It is a rear view showing the structure of a fixed scroll component in the first embodiment to which the present invention is applied.

[0021] Figure 5It is a side view showing the structure of a fixed scroll component and a fixed cover in a second embodiment to which the present invention is applied.

[0022] Figure 6 It is a rear view showing the structure of a fixed scroll component in a second embodiment to which the present invention is applied.

[0023] Figure 7 It is a partially enlarged cross-sectional view showing the structure of a fixed scroll component and a fixed cover in a second embodiment to which the present invention is applied. DETAILED DESCRIPTION

[0024] use Figure 1~Figure 4 A first embodiment to which the present invention is applied will be described.

[0025] Figure 1 It is a side view showing the structure of the scroll compressor according to the present embodiment. Figure 2 It is a cross-sectional view showing the structure of the scroll compressor according to the present embodiment. Figure 3 It is a side view showing the structure of the fixed scroll component and the fixed cover in this embodiment. Figure 4 It is a rear view showing the structure of the fixed scroll component in the present embodiment, and shows a state in which the fixed cover is removed.

[0026] The scroll compressor of this embodiment includes a housing 10, a fixed scroll component 11, a rotating scroll component 12, a drive shaft 13, a cooling fan 14, and a duct 15. The fixed scroll component 11 is connected to the opening side ( Figure 1 and Figure 2 The rotating scroll component 12 is housed in the housing 10. The drive shaft 13 is rotatably supported by a bearing 16 in the housing 10. The cooling fan 14 rotates together with the drive shaft 13 to generate cooling air. Only a portion of the duct 15 is shown in the figure, and the cooling air generated by the cooling fan 14 is led out.

[0027] The fixed scroll component 11 includes a substantially circular end plate 17 and a Figure 1 and Figure 2 The spiral vortex 18 is vertically arranged on the left side of the end plate 17, and the spiral vortex 18 is vertically arranged on the left side of the end plate 17. Figure 1~Figure 3 The fixed scroll component 11 is a casting made of, for example, an aluminum alloy, and the end plate 17, the vortex ring 18, the cooling fins 19 and the discharge tube 20 are integrally formed.

[0028] A suction flow path 21 is formed in the radially outer portion of the end plate 17 of the fixed scroll component 11, and a suction filter 22 is connected to the suction flow path 21. A communication hole communicating with the interior of the discharge tube 20 is formed in the radially central portion of the end plate 17 of the fixed scroll component 11. The internal thread portion of the discharge tube 20 of the fixed scroll component 11 is screwed with the external thread portion of the discharge pipe 23 made of, for example, an iron alloy, whereby the discharge tube 20 of the fixed scroll component 11 is connected to the discharge pipe 23.

[0029] A fixed cover 24 is attached to the front end side of the cooling fins 19 of the fixed scroll component 11, and the cooling air from the duct 15 flows through a flow path formed by the cooling fins 19 and the fixed cover 24. Thus, the fixed scroll component 11 is cooled.

[0030] The orbiting scroll component 12 includes: a substantially circular end plate 25; a vertically disposed side surface of the end plate 25 in a manner opposite to the fixed scroll component 11 ( Figure 1 and Figure 2 and a spiral vortex 26 disposed upright on the opposite side of the end plate 25 ( Figure 1 and Figure 2 The left side of the rotating scroll component 12 has a plurality of cooling fins 27. In addition, the rotating scroll component 12 is, for example, a casting made of an aluminum alloy, and the end plate 25, the vortex ring 26 and the cooling fins 27 are integrally formed.

[0031] A plate 28 is attached to the front end side of the cooling fin 27 of the orbiting scroll component 12, and the cooling air from the duct 15 flows through a flow path formed by the cooling fin 27 and the plate 28. Thus, the orbiting scroll component 12 is cooled.

[0032] On one end side of the drive shaft 13 ( Figure 1 and Figure 2 A crank portion 29 is provided on the right side of the plate 28. The crank portion 29 is eccentric from the center of the drive shaft 13 and is connected to the boss portion of the plate 28 via a rotary bearing 30.

[0033] The other end side of the drive shaft 13 ( Figure 1 and Figure 2 The left side of the housing 10 protrudes to the outside of the housing 10, and a pulley 31 is provided. A belt (not shown) is stretched between a pulley (not shown) provided on the rotating shaft (not shown) of the motor and the pulley 31. As a result, the rotational force of the motor is transmitted to rotate the drive shaft 13, and the rotating scroll component 12 rotates relative to the fixed scroll component 11. In addition, a rotation prevention mechanism for preventing the rotating scroll component 12 from rotating is provided in the housing 10.

[0034] A plurality of working chambers are formed between the vortex 18 of the fixed scroll component 11 and the vortex 26 of the rotating scroll component 12. Each working chamber moves from the outside to the inside in the direction in which the vortex extends (in other words, in a manner close to the radial center of the fixed scroll component 11) as the rotating scroll component 12 rotates, and performs an intake stroke, a compression stroke, and a discharge stroke in sequence. The working chamber of the intake stroke inhales gas (for example, air) via the intake flow path 21 and the intake filter 22 of the fixed scroll component 11. The working chamber of the compression stroke compresses the gas (in other words, changes the pressure of the gas). The working chamber of the discharge stroke discharges the compressed gas (in other words, the gas after the pressure change) via the discharge cylinder 20 and the discharge pipe 23 of the fixed scroll component 11.

[0035] As a feature of the present embodiment, the discharge tube 20 of the fixed scroll component 11 extends from the end plate 17 of the fixed scroll component 11 in a manner that passes over the inner surface (and outer surface) of the fixed cover 24. Thus, even without removing the fixed cover 24, the connection state of the discharge tube 20 of the fixed scroll component 11 and the discharge pipe 23 can be visually confirmed, and the operation of connecting them can be easily performed. As a result, it is possible to prevent the discharge tube 20 of the fixed scroll component 11 from being poorly connected to the discharge pipe 23 and prevent damage to the discharge tube 20 of the fixed scroll component 11.

[0036] In addition, if the thermal conductivity of the discharge tube 20 of the fixed scroll component 11 is higher than that of the discharge pipe 23, compared with the case where the discharge tube 20 of the fixed scroll component 11 does not extend to the fixed cover 24 (in other words, a part of the discharge pipe 23 exists on the inner side of the fixed cover 24), the compressed air just discharged from the connecting hole of the end plate 17 of the fixed scroll component 11 can be efficiently cooled by cooling air.

[0037] In the first embodiment, the discharge cylinder 20 and the discharge pipe 23 of the fixed scroll component 11 are directly connected to each other, but the present invention is not limited to this. Figure 5 As shown, the discharge tube 20 of the fixed scroll component 11 can also be connected to the discharge pipe via the joint 32. If detailed, for example, on one side of the joint 32 ( Figure 5 Then, for example, using a wrench that holds the joint 32, tighten the other side of the joint 32 ( Figure 5 The external threaded portion of the discharge tube 20 is screwed into the internal threaded portion of the discharge tube 20. Thus, unlike the case where a pipe clamp is used to hold the discharge tube, the discharge tube can be connected without damaging the discharge tube. In addition, the pipe clamp is difficult to operate and has low workability, whereas the connection can be performed using a wrench that is easy to operate, and workability is improved.

[0038] use Figure 5~Figure 7A second embodiment to which the present invention is applied will be described. In this embodiment, the same reference numerals are given to the same parts as those in the first embodiment, and the description thereof will be omitted as appropriate.

[0039] Figure 5 It is a side view showing the structure of the fixed scroll component and the fixed cover in this embodiment. Figure 6 It is a rear view showing the structure of the fixed scroll component in the present embodiment, and shows a state in which the fixed cover is removed. Figure 7 It is a partially enlarged cross-sectional view showing the structure of the fixed scroll component and the fixed cover in the present embodiment.

[0040] As in the first embodiment, the discharge tube 20 of the fixed scroll component 11 extends from the end plate 17 of the fixed scroll component 11 in a manner that passes over the inner surface (and outer surface) of the fixed cover 24. Thus, even without removing the fixed cover 24, the connection state of the discharge tube 20 of the fixed scroll component 11 and the joint 32 can be visually confirmed, and the operation of connecting them can be easily performed. As a result, it is possible to prevent the discharge tube 20 of the fixed scroll component 11 from being poorly connected to the joint 32 and to prevent damage to the discharge tube 20 of the fixed scroll component 11.

[0041] The fixed scroll component 11 also has a plurality of (six in this embodiment) ribs 33 formed on the outer peripheral side of the discharge tube 20 and extending in the axial direction of the discharge tube 20 so as to form a gap with the fixed cover 24. This can improve the strength of the discharge tube 20 of the fixed scroll component 11. In addition, since the heat transfer area is increased, the compressed air just discharged can be cooled more efficiently by the cooling wind.

[0042] An annular sealing member 34 is disposed in the gap between the fixed cover 24 and the plurality of ribs 33 and on the outer peripheral side of the discharge tube 20. The sealing member 34 closes the through hole 35 of the fixed cover 24 through which the discharge tube 20 of the fixed scroll component 11 passes, and prevents cooling air from leaking from the through hole 35. Thus, the cooling performance of the fixed scroll component 11 can be ensured.

[0043] In addition, in the first and second embodiments, the case where the discharge tube 20 of the fixed scroll component 11 extends from the end plate 17 of the fixed scroll component 11 in a manner that passes over the inner surface (and outer surface) of the fixed cover 24 is described as an example, but the present invention is not limited to this. The discharge tube 20 of the fixed scroll component 11 may also extend from the end plate 17 of the fixed scroll component 11 to the inner surface of the fixed cover 24 (in other words, it may also extend in a manner that does not pass over the inner surface of the fixed cover 24). Alternatively, the discharge tube 20 of the fixed scroll component 11 may also extend from the end plate 17 of the fixed scroll component 11 to the outer surface of the fixed cover 24 (in other words, it may also extend in a manner that does not pass over the outer surface of the fixed cover 24). In these modified examples, it is also possible to obtain effects substantially the same as those of the above-mentioned embodiments.

[0044] In addition, the above description is given by taking the case where the present invention is applied to a scroll compressor as one of the scroll fluid machines as an example, but the invention is not limited thereto and can also be applied to other scroll fluid machines (specifically, scroll vacuum pumps, scroll expanders, etc.).

[0045] Description of Reference Numerals

[0046] 11 ... a fixed scroll component, 12 ... a rotating scroll component, 13 ... a driving shaft, 17 ... an end plate, 18 ... a vortex ring, 19 ... a cooling fin, 20 ... a discharge cylinder, 23 ... a discharge pipe, 24 ... a fixed cover, 25 ... an end plate, 26 ... a vortex ring, 32 ... a joint, 33 ... a rib, 34 ... a sealing component.

Claims

1. A scroll fluid machine, characterized in that: include: a fixed scroll component having an end plate, a spiral scroll formed integrally with the end plate and erected on one surface of the end plate, and a plurality of cooling fins formed integrally with the end plate and erected on an opposite surface of the end plate; an orbiting scroll component including an end plate, and a spiral wrap formed integrally with the end plate and erected on one side of the end plate so as to face the fixed scroll component; a drive shaft for rotating the orbiting scroll component relative to the fixed scroll component; and a fixed cover mounted on the front end side of the plurality of cooling fins of the fixed scroll component, The pressure of the gas is changed by using a plurality of working chambers formed between the vortex of the fixed scroll component and the vortex of the orbiting scroll component, The fixed scroll component further includes a discharge tube, which is integrally formed with the end plate and is provided upright on the opposite surface of the end plate, and discharges the gas whose pressure is changed by the working chamber. The discharge tube of the fixed scroll component extends from the end plate of the fixed scroll component to the inner surface of the fixed cover or extends over the inner surface.

2. The scroll fluid machine according to claim 1, characterized in that: The fixed scroll component has a plurality of ribs formed on an outer peripheral side of the discharge tube and extending in the axial direction of the discharge tube so as to form a gap with the fixed cover.

3. The scroll fluid machine according to claim 2, characterized in that: An annular sealing member is disposed in a gap between the fixed cover and the plurality of ribs and on the outer peripheral side of the discharge tube.

4. The scroll fluid machine according to claim 1, characterized in that: The heat conductivity of the discharge tube of the fixed scroll component is higher than the heat conductivity of a discharge pipe or a joint connected to the discharge tube.

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