JP2016160788A - Open type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open type compressor capable of using existing piping as it is.SOLUTION: An open type compressor is equipped with a housing which stores a scroll compression mechanism and is formed with a suction port 25 and a discharge port 24 on the outer peripheral surface; and a discharge side joint portion 26 attached to the discharge port 24 and capable of attaching/detaching outflow piping. The discharge side joint portion 26 is formed with a first outflow channel 26a communicating the outflow piping and the discharge port 24 inside, and an axis Y in which the first outflow channel 26a extends is disposed at a position offset from a discharging direction axis of the discharge port 24 to which the discharge side joint portion 26 is attached.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an open type compressor applicable to a compressor, a pump, an expander, and the like.

2. Description of the Related Art Conventionally, there is known an open type compressor in which one end portion of a drive shaft that is rotatably supported inside a housing via a bearing is protruded to the outside of the housing and is driven by receiving power from the outside (for example, Patent Documents 1 and 2).
The open-type compressor has a suction side joint portion (fitting) connected to an inflow pipe through which fluid flows and a discharge side joint portion (fitting) connected to an outflow pipe through which fluid flows. The suction side joint portion and the discharge side joint portion are attached to a mounting seat surface formed in the housing.

Japanese Utility Model Publication No.59-123679 Japanese Utility Model Publication No. 60-32581

  When replacing an existing open type compressor with a new open type compressor, the inflow piping and outflow piping attached to the existing open type compressor are replaced with the suction side joint and discharge side joint of the new open type compressor. By installing, existing inflow piping and outflow piping can be used as they are.

  However, when the positions of the fluid suction port and the discharge port formed in the housing of the new open compressor are different from those of the existing open compressor, the connection position of the pipe and the connection position of the joint portion are different. The new open type compressor cannot be directly connected to the existing piping.

  The present invention has been made in view of such circumstances, and even when the position of the inlet or outlet of the fluid formed in the housing does not correspond to the connection position of the existing piping. An object of the present invention is to provide an open type compressor that can use existing piping as it is.

In order to solve the above-described problems, the open type compressor of the present invention employs the following means.
The open type compressor according to the first aspect of the present invention is driven by a drive shaft and compresses a fluid flowing from a suction port and discharges the fluid from the discharge port. A housing formed with a suction port and a discharge port; and a joint portion that is attached to the suction port or the discharge port and that is detachable from a pipe that circulates fluid. The joint section includes the pipe and the suction port. A flow path communicating with the opening or the discharge port is formed inside, and an axis extending from the flow path is offset from a suction direction axis of the suction port to which the joint portion is attached or a discharge direction axis of the discharge port It is arranged at the position.

According to the open type compressor of the first aspect of the present invention, the fluid suction port and the discharge port are formed on the outer peripheral surface of the housing, and the joint portion is attached to the suction port or the discharge port. A flow path is formed inside the joint portion.
The axis extending from the flow path is disposed at a position offset from the suction direction axis of the suction port to which the joint portion is attached or the discharge direction axis of the discharge port.

  Since the axis extending from the flow path is arranged at a position offset from the suction direction axis of the suction port to which the joint portion is attached or the discharge direction axis of the discharge port, the position offset from the suction port or the discharge port is the same as the flow path. Can be attached to the joint portion using the existing piping as it is.

  Thus, according to the open type compressor of the first aspect of the present invention, the position of the fluid suction port or discharge port formed in the housing does not correspond to the connection position of the existing pipe. However, it is possible to provide an open type compressor that can use the existing piping as it is.

In the open-type compressor according to the first aspect of the present invention, the flow path includes a first flow path connected to the pipe, and a second flow path that connects the first flow path and the suction port or the discharge port. The flow path may be formed inside.
By doing in this way, between the piping and the suction port or the discharge port, using the first flow channel connected to the piping and the second flow channel that communicates the first flow channel with the suction port or the discharge port. Can circulate the fluid.

In the open type compressor having the above-described configuration, an axis extending from the flow path arranged at a position offset from the suction direction axis of the suction port to which the joint portion is attached or from the discharge direction axis of the discharge port is extended. May be an axis extending from the first flow path. In this case, the first flow path may extend along the axis along which the drive shaft extends.
In this way, the axis extending from the first flow path connected to the pipe is offset from the suction direction axis of the suction port or the discharge direction axis of the discharge port, and the connection position of the existing pipe is Can be matched.

In the open type compressor configured as described above, a closed space is formed between the inner peripheral surface of the joint portion and the outer peripheral surface of the housing, and the suction direction axis of the suction port to which the joint portion is attached. The axis extending from the flow path arranged on the line or at a position offset from the discharge direction axis of the discharge port may be an axis extending from the second flow path. In this case, an axis extending from the second flow path may be arranged in a direction along the suction direction axis of the suction port or in a direction along the discharge direction axis of the discharge port.
By doing so, an axis extending from the second flow path that connects the first flow path and the suction port or the discharge port is offset from the suction direction axis of the suction port or the discharge direction axis of the discharge port. It can be made to correspond with the connection position of the existing piping.

In the open-type compressor having the above configuration, the joint portion includes a first joint member in which the first flow path is formed, and a second joint member in which the second flow path is formed. The first joint member and the second joint member may be joined.
By doing so, even if the position of the suction port or the discharge port of the fluid formed in the housing does not correspond to the connection position of the existing pipe, the first joint member is positioned at an appropriate position. It is possible to join the two joint members and use the existing piping as it is. In addition, since the first joint member and the second joint member are separate, the joint portion can be manufactured more easily than in the case where these members are formed with a single member.

In the open type compressor of the first aspect of the present invention, the joint portion has a pair of through holes into which a pair of fastening bolts are inserted, and the mounting seat surface protruding from the outer peripheral surface of the housing includes A pair of fastening holes to be fastened with a pair of fastening bolts are formed, and the mounting seat surface may have an annular shape centering on the suction port or the discharge port in plan view.
By doing in this way, even if the attachment angle of the joint portion with respect to the center position of the suction port or the discharge port formed in the housing does not correspond to the existing piping, the mounting seat surface formed in an annular shape By newly forming a pair of fastening holes, the mounting angle corresponding to the existing piping can be obtained.

In the open-type compressor according to the first aspect of the present invention, the outer peripheral surface in which the suction port and the discharge port are formed extends in a circumferential direction around an axis extending with the drive shaft. Also good.
By doing in this way, the suction port and discharge port formed in the outer peripheral surface extended in the circumferential direction around the axis line in which the drive shaft extends can be connected to the existing piping.

  According to the present invention, even if the position of the suction port or the discharge port for the fluid formed in the housing does not correspond to the connection position of the existing piping, the existing piping can be used as it is. An open type compressor can be provided.

It is a longitudinal section showing an open type compressor of a 1st embodiment of the present invention. It is a top view which shows the discharge side attachment seat surface and suction | inhalation side attachment seat surface of FIG. It is a top view which shows the discharge side joint part and suction | inhalation side joint part of FIG. It is an AA arrow sectional view showing a discharge side joint part and a suction side joint part of Drawing 1. It is a BB arrow sectional view showing the discharge side joint part and suction side joint part of Drawing 4. It is a longitudinal cross-sectional view which shows the discharge side joint part and suction | inhalation side joint part of the open type compressor of 2nd Embodiment of this invention. It is a top view which shows the discharge side attachment seat surface and suction | inhalation side attachment seat surface of the open type compressor of 3rd Embodiment of this invention.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1, the open scroll compressor (open compressor) 1 includes a cylindrical housing 2 extending in the circumferential direction around the axis X. The housing 2 is opened at the front end side and sealed at the rear end side, and the front housing 3 is fastened and fixed to the opening at the front end side with a bolt 4 to form a sealed space therein. The scroll compression mechanism 5 and the drive shaft 6 are housed inside.

  As shown in FIG. 1, a discharge-side mounting seat surface 2a is formed on the outer peripheral surface of the housing 2, and a discharge-side joint portion 26 is attached to the discharge-side mounting seat surface 2a. A suction side attachment seat surface 2b is formed on the outer peripheral surface of the housing 2, and a suction side joint portion 27 is attached to the suction side attachment seat surface 2b.

  The circumferential position around the axis X where the suction side mounting seat surface 2b and the suction side joint portion 27 are arranged is the circumferential position around the axis X where the discharge side mounting seat surface 2a and the discharge side joint portion 26 are arranged. Is different. Therefore, in FIG. 1, the suction side mounting seat surface 2b and the suction side joint portion 27 are indicated by broken lines.

FIG. 2 is a plan view showing the discharge side mounting seat surface 2a and the suction side mounting seat surface 2b. In FIG. 2, the code | symbol corresponding to the suction | inhalation side attachment seat surface 2b is shown by the parenthesis writing.
As shown in FIG. 2, the discharge side mounting seat surface 2a to which the discharge side joint portion 26 is attached has a discharge port 24 for discharging fluid from the inside of the housing 2 to the discharge side joint portion 26, and a pair of fastening bolts described later. A fastening hole 2c to which 28 is fastened is formed.
As shown in parentheses in FIG. 2, a suction side mounting seat surface 2 b to which the suction side joint portion 27 is attached has a suction port 25 through which fluid flows from the suction side joint portion 27 into the housing 2, and a pair described later. The fastening hole 2d to which the fastening bolt 29 is fastened is formed.

  As shown in FIG. 1, the drive shaft 6 is rotatably supported by the front housing 3 via a main bearing 7 and a sub bearing 8. A pulley (not shown) is rotatably installed on the front end of the drive shaft 6 projecting from the front housing 3 through the lip seal 9 to the outer periphery of the front housing 3 via a bearing (not shown). ) Are connected via an electromagnetic clutch (not shown). As described above, the drive shaft 6 receives power from the outside that drives the pulley via the electromagnetic clutch, and rotates about the axis X shown in FIG.

  A crank pin 13 that is eccentric by a predetermined dimension is integrally provided at the rear end of the drive shaft 6. Further, the rear end of the drive shaft 6 is connected to a turning scroll 16 of the scroll compression mechanism 5 described later and a known driven crank mechanism 14 including a drive bush whose variable turning radius is variable.

The scroll compression mechanism 5 is driven by the drive shaft 6 and compresses the fluid (refrigerant gas) flowing from the suction port 25 formed in the housing 2 and discharges it from the discharge port 24 formed in the housing 2. .
The scroll compression mechanism 5 forms a pair of compression chambers 17 between the scrolls 15 and 16 by meshing the pair of fixed scrolls 15 and the orbiting scroll 16 with a phase difference of 180 degrees. The fluid (refrigerant gas) is compressed by moving from the position to the center position while gradually reducing the volume.

The fixed scroll 15 includes a discharge port 18 that discharges compressed gas at a central portion, and is fixedly installed on the bottom wall surface of the housing 2 via a bolt 19. In addition, the orbiting scroll 16 is connected to the crank pin 13 of the drive shaft 6 via a driven crank mechanism 14 so that the orbiting scroll 16 can be revolved and driven on a thrust bearing surface of the front housing 3 via a known rotation prevention mechanism (not shown). It is supported.
An O-ring 21 is provided on the outer periphery of the end plate 15 </ b> A of the fixed scroll 15. By bringing the O-ring 21 into close contact with the inner peripheral surface of the housing 2, the internal space of the housing 2 is partitioned into a discharge chamber 22 and a suction chamber 23.

The discharge chamber 22 communicates with the discharge port 18 so that fluid (compressed refrigerant gas) from the compression chamber 17 is discharged. The fluid discharged to the discharge port 18 is discharged from the discharge port 24 formed in the housing 2 to the refrigeration cycle side via the discharge side joint portion 26.
The suction chamber 23 communicates with a suction port 25 formed in the housing 2, and low-pressure fluid that has circulated through the refrigeration cycle is sucked from the suction port 25 through the suction side joint portion 27 and compressed through the suction chamber 23. A fluid is sucked into the chamber 17.

  In addition, the pair of fixed scroll 15 and orbiting scroll 16 are configured such that spiral wraps 15B and 16B are erected on end plates 15A and 16A, respectively. A pair of compression chambers 17 partitioned by the end plates 15A and 16A and the spiral wraps 15B and 16B are formed between the scrolls 15 and 16 symmetrically with respect to the scroll center. Further, the orbiting scroll 16 is driven to smoothly revolve around the fixed scroll 15.

  As shown in FIG. 1, the compression chamber 17 has a height in the axial direction higher than the height on the outer peripheral side of the spiral wraps 15B and 16B. As a result, when the compression chamber 17 moves from the outer peripheral side to the central side while reducing the volume and compresses the fluid, it can be compressed in both the circumferential direction and the wrap height direction of the spiral wraps 15B and 16B. A simple scroll compression mechanism 5 is configured.

Next, the discharge side joint part 26 and the suction side joint part 27 will be described in detail with reference to FIGS.
3 to 5 show the discharge side joint portion 26 and the suction side joint portion 27. In FIGS. 3 to 5, reference numerals corresponding to the suction side joint portions 27 are shown in parentheses.

(Discharge side joint)
The discharge-side joint portion 26 shown in FIG. 3 is a member that is attached to the discharge port 24 (discharge-side mounting seat surface 2a) of the housing 2 and that can attach and detach the outflow pipe 30 through which fluid flows. The discharge side joint part 26 is formed of a metal material (for example, brass which is an alloy of copper and zinc).

As shown in the cross-sectional view of FIG. 4, the discharge side joint portion 26 has a pair of through holes 26e. A pair of fastening bolts 28 shown in FIG. 3 is inserted into each of the pair of through holes 26e, and fastened to the pair of fastening holes 2c of the discharge side mounting seat surface 2a shown in FIG.
Although four fastening holes 2c are shown in FIG. 2, a pair of fastening bolts 28 are fastened to a pair of upper and lower fastening holes 2c. The pair of left and right fastening holes 2c are used when the attachment angle of the discharge side joint portion 26 is varied by 90 degrees.

As shown in FIG. 3, the end of the outflow pipe 30 on the discharge side joint portion 26 side has a flare shape that gradually expands toward the tip. On the other hand, the end of the discharge side joint portion 26 on the outflow pipe 30 side has a tapered shape that gradually decreases toward the tip.
As shown in FIG. 3, the discharge-side joint portion 26 and the outflow pipe 30 have an internal thread formed on the inner peripheral surface of the connection nut 30 a in a state where the ends are in contact with each other on the outer peripheral surface of the discharge-side joint portion 26. It connects by fastening to the formed external thread.

  As shown in FIGS. 4 and 5, a first outflow passage 26 a (first passage) and a second outflow passage 26 b (second passage) are formed in the discharge side joint portion 26. Yes. The first outflow passage 26 a is a passage that extends along an axis Y parallel to the axis X and is connected to the outflow pipe 30. The second outflow passage 26b is a passage that extends along an axis R (discharge direction axis) orthogonal to the axis X of the housing 2 and guides the fluid discharged from the discharge port 24 to the first outflow passage 26a.

As shown in FIG. 3, in the circumferential direction Z around the axis X, the center position C2 of the outflow pipe 30 coinciding with the axis Y (second axis) is offset from the center position C1 of the discharge port 24 by a distance L1.
Then, as shown in FIG. 4, with respect to the center position C1 of the discharge port 24 in the circumferential direction Z so as to coincide with the center position C2 of the outflow pipe 30 offset from the center position C1 of the discharge port 24 in the circumferential direction Z. Thus, the center position C2 of the first outflow passage 26a is offset. Thus, the axis line Y in which the first outflow passage 26a extends is arranged at a position offset from the discharge port 24 to which the discharge side joint portion 26 is attached.
Therefore, it is possible to connect the existing outflow pipe 30 to the discharge side joint portion 26 and to distribute the fluid discharged from the discharge port 24 to the outflow pipe 30.

As shown in FIGS. 4 and 5, the discharge-side joint portion 26 includes a first discharge-side joint member 26c (first joint member) in which a first outflow passage 26a is formed, and a second outflow passage 26b. Has a second discharge-side joint member 26d (second joint member) formed inside. The first discharge side joint member 26c and the second discharge side joint member 26d are joined by brazing welding using a brazing material (for example, silver brazing, copper brazing, brass brazing).
As shown in FIGS. 4 and 5, the discharge-side joint portion 26 has a service valve 26f for adding a fluid (refrigerant gas) to the second outflow passage 26b.

(Suction side joint)
The suction side joint portion 27 shown in FIG. 3 is a member that is attached to the suction port 25 (suction side mounting seat surface 2b) of the housing 2 and that can attach and detach the inflow piping 31 through which fluid flows. The suction side joint portion 27 is formed of a metal material (for example, brass which is an alloy of copper and zinc).

As shown in the cross-sectional view of FIG. 4, the suction side joint portion 27 has a pair of through holes 27e. A pair of fastening bolts 29 shown in FIG. 3 is inserted into each of the pair of through holes 27e, and fastened to the pair of fastening holes 2d of the suction side mounting seat surface 2b shown in FIG.
Although four fastening holes 2d are shown in FIG. 2, a pair of fastening bolts 29 are fastened to a pair of upper and lower fastening holes 2d. The pair of left and right fastening holes 2d are used when the attachment angle of the suction side joint portion 27 is varied by 90 degrees.

As shown in FIG. 3, the end of the inflow pipe 31 on the suction side joint 27 side has a flare shape that gradually expands toward the tip. On the other hand, the end of the suction side joint 27 on the inflow pipe 31 side has a tapered shape that gradually decreases toward the tip.
As shown in FIG. 3, the suction side joint portion 27 and the inflow pipe 31 have an internal thread formed on the inner peripheral surface of the connection nut 31 a in a state where the ends are in contact with each other on the outer peripheral surface of the suction side joint portion 27. It connects by fastening to the formed external thread.

  As shown in FIGS. 4 and 5, a first inflow channel 27 a (first channel) and a second inflow channel 27 b (second channel) are formed inside the suction side joint portion 27. Yes. The first inflow channel 27 a is a channel that extends along an axis Y parallel to the axis X and is connected to the inflow pipe 31. The second inflow channel 27 b is a channel that extends along an axis R (suction direction axis) orthogonal to the axis X of the housing 2 and guides the fluid that flows in from the first inflow channel 27 a to the suction port 25.

Further, as shown in FIG. 3, in the circumferential direction Z around the axis X, the center position C4 of the inflow pipe 31 that coincides with the axis Y (second axis) is offset from the center position C3 of the suction port 25 by a distance L2. Yes.
Then, as shown in FIG. 4, with respect to the center position C3 of the suction port 25 in the circumferential direction Z so as to coincide with the center position C4 of the inflow pipe 31 offset from the center position C3 of the suction port 25 in the circumferential direction Z. Thus, the center position C4 of the first inflow channel 27a is offset. As described above, the axis Y in which the first inflow channel 27a extends is disposed at a position offset from the suction port 25 to which the suction side joint portion 27 is attached.
Therefore, the existing inflow pipe 31 can be connected to the suction side joint portion 27 and the fluid flowing in from the inflow pipe 31 can be circulated to the suction port 25.

As shown in FIGS. 4 and 5, the suction side joint portion 27 includes a first suction side joint member 27c (first joint member) in which a first inflow passage 27a is formed, and a second inflow passage 27b. Has a second suction side joint member 27d (second joint member) formed inside. The first suction side joint member 27c and the second suction side joint member 27d are joined by brazing welding using a brazing material (for example, silver brazing, copper brazing, brass brazing).
As shown in FIGS. 4 and 5, the suction side joint portion 27 has a service valve 27 f for adding a fluid (refrigerant gas) to the second inflow channel 27 b.

The operation and effect of the open compressor 1 of the present embodiment described above will be described.
According to the open type compressor 1 of the present embodiment, the fluid suction port 25 and the discharge port 24 are formed on the outer peripheral surface of the housing 2 extending in the circumferential direction around the axis X, and the suction side joint portion 27 is formed in each. And the discharge side joint part 26 is attached. A first inflow passage 27 a extending along an axis Y parallel to the axis X is formed inside the suction side joint 27, and the discharge side joint 26 extends along an axis Y parallel to the axis X. A first outflow channel 26a is formed.

Since the axis Y is arranged at a position offset from the discharge port 24 attached to the discharge side joint portion 26, the existing outflow whose center position in the circumferential direction is offset from the discharge port 24 is the same as the first outflow channel 26a. The pipe 30 can be used as it is and connected to the discharge side joint portion 26.
Further, since the axis Y is disposed at a position offset from the suction port 25 attached to the suction side joint portion 27, the existing center position in the circumferential direction is offset from the suction port 25 in the same manner as the first inflow channel 27a. The inflow pipe 31 can be used as it is and connected to the suction side joint portion 27.

  As described above, according to the open type compressor 1 of the present embodiment, the circumferential positions of the suction port 25 and the discharge port 24 of the fluid formed in the housing 2 are connected to the existing inflow piping 31 and the outflow piping 30. Even if it does not correspond to the position, it is possible to provide the open compressor 1 that can use the existing inflow pipe 31 and outflow pipe 30 as they are.

Further, according to the open type compressor 1 of the present embodiment, the suction side joint portion 27 includes the first suction side joint member 27c in which the first inflow passage 27a is formed and the second inflow passage 27b. And a second suction side joint member 27d formed inside, which are joined by brazing welding.
By doing so, even if the position of the fluid suction port 25 formed in the housing 2 does not correspond to the connection position of the existing inflow pipe 31, the first suction side joint member 27 c is appropriately selected. By joining the second suction side joint member 27d at the position, the existing inflow pipe 31 can be used as it is. Further, since the first suction side joint member 27c and the second suction side joint member 27d are separate bodies, the suction side joint portion 27 can be manufactured more easily than when these are formed by a single member. can do.

Moreover, according to the open type compressor 1 of this embodiment, the discharge side joint part 26 has the 1st discharge side joint member 26c in which the 1st outflow channel 26a was formed inside, and the 2nd outflow channel 26b. A second discharge-side joint member 26d formed inside is joined by brazing welding.
By doing in this way, even if the position of the fluid discharge port 24 formed in the housing 2 does not correspond to the connection position of the existing outflow pipe 30, the first discharge-side joint member 26 c is appropriately selected. By joining the second discharge side joint member 26d at the position, the existing outflow pipe 30 can be used as it is. In addition, since the first discharge side joint member 26c and the second discharge side joint member 26d are separated, the discharge side joint portion 26 can be manufactured more easily than when these members are formed with a single member. can do.

In the present embodiment, the first inflow channel 27a with respect to the center position C2 of the first outflow channel 26a with respect to the center position C1 of the discharge port 24 in the circumferential direction Z and the center position C3 of the suction port 25 with respect to the circumferential direction Z. The center position C4 is offset in each case, but other modes may be used.
Either the center position C2 of the first outflow passage 26a with respect to the center position C1 of the discharge port 24 in the circumferential direction Z or the center position C4 of the first inflow passage 27a with respect to the center position C3 of the suction port 25 in the circumferential direction Z May be offset.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 5, the open-type compressor of the first embodiment matches the center position of the second outflow passage 26b with the center position of the discharge port 24 in the axis Y direction parallel to the axis X, and the axis line The center position of the second inflow channel 27b is made to coincide with the center position of the suction port 25 in the Y direction.

  On the other hand, in the present embodiment, as shown in FIG. 6, the center position C6 of the second outflow passage 26b is offset with respect to the center position C5 of the discharge port 24 in the axis Y direction, and the suction port 25 in the axis Y direction. The center position C8 of the second inflow channel 27b is offset with respect to the center position C7.

FIG. 6 shows the discharge side joint portion 26 ′ and the suction side joint portion 27 ′ of the present embodiment. In FIG. 6, reference numerals corresponding to the suction side joint portions 27 ′ are shown in parentheses.
In addition, about the structure similar to the discharge side coupling part 26 and the suction side coupling part 27 of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Discharge side joint)
As shown in FIG. 6, a cover member 26 f is provided at the bottom of the discharge side joint portion 26 ′. The cover member 26g is attached to the protruding portion 2e formed on the outer peripheral surface of the housing 2 by fastening bolts 32. A discharge-side closed space S <b> 1 is formed between the inner peripheral surface (bottom surface) of the discharge-side joint portion 26 ′ and the outer peripheral surface of the housing 2.

  The discharge side joint portion 26 ′ extends in the first outflow passage 26 a connected to the outflow pipe 30, the axis R direction orthogonal to the axis X (second axis direction; suction direction axis), and from the discharge port 24 to the discharge side. A second outflow channel 26b that guides the fluid discharged to the closed space S1 to the first outflow channel 26a is formed inside.

As shown in FIG. 6, the center position C6 of the second outflow passage 26b with respect to the center position C5 of the discharge port 24 in the axis Y direction parallel to the axis X is offset by a distance L3. As described above, the axis R in which the second outflow passage 26b extends is disposed at a position offset from the discharge port 24 to which the discharge side joint portion 26 ′ is attached.
Therefore, even when the position of the end portion of the existing outflow pipe 30 in the axis Y direction does not correspond to the position of the discharge port 24, the existing outflow pipe 30 is connected to the discharge side joint portion 26 ′, The fluid discharged from the outlet 24 can be circulated to the outflow pipe 30.

(Suction side joint)
As shown in FIG. 6, a cover member 27g is provided at the bottom of the suction side joint portion 27 ′. The cover member 27g is attached to a protruding portion 2f formed on the outer peripheral surface of the housing 2 by fastening bolts 33. A suction side closed space S <b> 2 is formed between the inner peripheral surface (bottom surface) of the suction side joint portion 27 ′ and the outer peripheral surface of the housing 2.

The suction side joint portion 27 ′ extends in the direction of the axis R perpendicular to the first inflow passage 27a connected to the inflow pipe 31 and the axis X, and flows the fluid that has flowed in from the first inflow passage 27a into the suction side closed space S2. A second inflow channel 27b for guiding is formed inside.
As shown in FIG. 6, the center position C8 of the second inflow passage 27b with respect to the center position C7 of the suction port 25 in the axis Y direction parallel to the axis X is offset by a distance L4. As described above, the axis R in which the second inflow channel 27b extends is disposed at a position offset from the suction port 25 to which the suction side joint portion 27 ′ is attached.
Therefore, even if the position of the end portion of the existing inflow pipe 31 in the direction of the axis Y does not correspond to the position of the suction port 25, the existing inflow pipe 31 is connected to the suction side joint portion 27 ′, and the inflow The fluid flowing from the pipe 31 can be circulated to the suction port 25.

As described above, according to the open type compressor 1 of the present embodiment, the axis R from which the second outflow passage 26b extends is disposed at a position offset from the discharge port 24 to which the discharge side joint portion 26 is attached. ing. Therefore, the existing outflow pipe 30 arranged at a position offset from the discharge port 24 in the axis X direction can be used as it is and connected to the discharge side joint portion 26.
In addition, the axis R in which the second inflow channel 27b extends is disposed at a position offset from the suction port 25 to which the suction side joint portion 27 is attached. Therefore, the existing inflow piping 31 arranged at a position offset in the axis X direction from the suction port 25 can be used as it is and connected to the suction side joint portion 27.

  As described above, according to the open type compressor of the present embodiment, the positions of the suction port 25 and the discharge port 24 of the fluid formed in the housing 2 in the direction of the axis line X are connected to the existing inflow pipe 31 and the outflow pipe 30. Even if it does not correspond to the position, it is possible to provide an open type compressor that can use the existing inflow pipe 31 and outflow pipe 30 as they are.

In the present embodiment, the center position C6 of the second outflow passage 26b with respect to the center position C5 of the discharge port 24 in the axis Y direction is offset, and the second position with respect to the center position C7 of the suction port 25 in the axis Y direction. Although the center position C8 of the inflow channel 27b is offset, other modes may be used.
Either the center position C6 of the second outflow channel 26b with respect to the center position C5 of the discharge port 24 in the axis Y direction or the center position C8 of the second inflow channel 27b with respect to the center position C7 of the suction port 25 in the axis Y direction One may be offset.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 2, the open type compressor 1 of the first embodiment has four fastening holes in the shape of the discharge side mounting seat surface 2 a and the suction side mounting seat surface 2 b formed in the housing 2 in plan view. It was a substantially cross shape formed.
On the other hand, in the open type compressor of the present embodiment, as shown in FIG. 7, the plan view of the discharge side mounting seat surface 2a ′ and the suction side mounting seat surface 2b ′ formed in the housing 2 is the discharge port 24 and It has an annular shape around the suction port 25.

  As shown in FIG. 7, a pair of fastening holes 2 c ′ are formed in the discharge side mounting seat surface 2 a ′ formed in the housing 2 as indicated by a solid line. Similarly, a pair of fastening holes 2 c ′ are formed in the discharge side mounting seat surface 2 a ′ formed in the housing 2 as indicated by a solid line.

When the outflow pipe 30 is disposed at the position shown in FIG. 7, when the fastening bolts 28 shown in FIG. 3 are fastened to the pair of fastening holes 2 c ′ shown by solid lines in FIG. The attachment angle of the discharge side joint portion 26 with respect to the center position does not correspond to the existing outflow pipe 30.
On the other hand, if a pair of fastening holes are newly formed at positions indicated by broken lines in FIG. 7, the mounting angle of the discharge side joint portion 26 with respect to the center position of the discharge port 24 formed in the housing 2 corresponds to the existing outflow pipe 30. To be.

  As described above, according to the open type compressor of the present embodiment, when the mounting angle of the discharge side joint portion 26 with respect to the center position of the discharge port 24 formed in the housing 2 does not correspond to the existing outflow pipe 30. Even if it exists, it can be set as the attachment angle corresponding to the existing outflow piping 30 by forming a pair of fastening hole newly in discharge side attachment seat surface 2a 'formed in an annular | circular shape.

  In addition, as shown in FIG. 7, a pair of fastening holes 2 d ′ are formed in the suction side mounting seat surface 2 b ′ formed in the housing 2 as indicated by a solid line. Similarly, a pair of fastening holes 2d 'is formed in the suction side mounting seat surface 2b' formed in the housing 2 as shown by a solid line.

When the inflow piping 31 is arranged at the position shown in FIG. 7, when the fastening bolts 29 shown in FIG. 3 are fastened to the pair of fastening holes 2 d ′ shown by solid lines in FIG. The attachment angle of the suction side joint portion 27 with respect to the center position does not correspond to the existing inflow pipe 31.
On the other hand, if a pair of fastening holes are newly formed at positions indicated by broken lines in FIG. 7, the attachment angle of the suction side joint portion 27 with respect to the center position of the suction port 25 formed in the housing 2 corresponds to the existing inflow pipe 31. To be.

  As described above, according to the open type compressor of the present embodiment, when the mounting angle of the suction side joint portion 27 with respect to the center position of the suction port 25 formed in the housing 2 does not correspond to the existing inflow pipe 31. Even if it exists, it can be set as the attachment angle corresponding to the existing inflow piping 31 by forming a pair of fastening hole newly in the suction | inhalation side attachment seat surface 2b 'formed in an annular | circular shape.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably.

DESCRIPTION OF SYMBOLS 1 Open type compressor 2 Housing 2a, 2a 'Discharge side mounting seat surface 2b, 2b' Suction side mounting seat surface 2c, 2c ', 2d, 2d' Fastening hole 2e, 2f Protrusion part 5 Scroll compression mechanism 6 Drive shaft 7 Main Bearing 8 Sub-bearing 9 Lip seal 24 Discharge port 25 Suction port 26, 26 'Discharge side joint portion 26a First outflow channel (first channel)
26b Second outlet channel (second channel)
26c 1st discharge side coupling member (1st coupling member)
26d 2nd discharge side coupling member (2nd coupling member)
26g Cover members 27 and 27 ′ Suction side joint portion 27a First inflow channel (first channel)
27b Second inflow channel (second channel)
27c First suction side joint member (first joint member)
27d Second suction side joint member (second joint member)
27 g Cover member 30 Outflow pipe 31 Inflow pipe R Axis (discharge direction axis; suction direction axis)
S1 Discharge side closed space S2 Suction side closed space X Axis line Y Axis line Z Circumferential direction

Claims (9)

A compression mechanism that is driven by the drive shaft and compresses the fluid flowing from the suction port and discharges it from the discharge port;
A housing in which the compression mechanism is accommodated and the suction port and the discharge port are formed on an outer peripheral surface;
A fitting part attached to the suction port or the discharge port and detachable from a pipe for circulating a fluid;
In the joint portion, a flow path that connects the pipe and the suction port or the discharge port is formed inside,
The open-type compressor in which the axis extending from the flow path is disposed at a position offset from the suction direction axis of the suction port to which the joint portion is attached or the discharge direction axis of the discharge port.   The flow path is characterized in that a first flow path connected to the pipe and a second flow path for communicating the first flow path with the suction port or the discharge port are formed inside. The open type compressor according to claim 1.   An axis extending from the flow path disposed at a position offset from the suction direction axis of the suction port to which the joint portion is attached or from the discharge direction axis of the discharge port is an axis from which the first flow path extends. The open type compressor according to claim 2, wherein A closed space is formed between the inner peripheral surface of the joint portion and the outer peripheral surface of the housing,
An axis extending from the flow path disposed at a position offset from the suction direction axis of the suction port to which the joint portion is attached or from the discharge direction axis of the discharge port is an axis from which the second flow path extends. The open type compressor according to claim 2, wherein The joint portion includes a first joint member in which the first flow path is formed, and a second joint member in which the second flow path is formed,
The open type compressor according to any one of claims 2 to 4, wherein the first joint member and the second joint member are joined. The joint portion has a pair of through holes into which a pair of fastening bolts are inserted,
A mounting seat surface protruding from the outer peripheral surface of the housing is formed with a pair of fastening holes to be fastened with the pair of fastening bolts.
The open type compressor according to any one of claims 1 to 5, wherein the mounting seat surface has an annular shape centering on the suction port or the discharge port in plan view.   The open type compressor according to claim 3, wherein an axis along which the first flow path extends is a direction along an axis along which the drive shaft extends.   5. The open mold according to claim 4, wherein an axis extending from the second flow path is disposed in a direction along the suction direction axis of the suction port or in a direction along the discharge direction axis of the discharge port. Compressor.   The open type compressor according to any one of claims 1 to 7, wherein the outer peripheral surface in which the suction port and the discharge port are formed extends in a circumferential direction around an axis line on which the drive shaft extends. .

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