WO2015159559A1

WO2015159559A1 - Oil separator

Info

Publication number: WO2015159559A1
Application number: PCT/JP2015/050314
Authority: WO
Inventors: 貴司森山; 村上　泰城
Original assignee: 三菱電機株式会社
Priority date: 2014-04-16
Filing date: 2015-01-08
Publication date: 2015-10-22
Also published as: JP5868557B1; JPWO2015159559A1

Abstract

An oil separator (1) equipped with: a container (2) having a cylindrical inner wall surface; an inflow pipe (6), which is connected to the container (2) along the tangential direction of the inner wall surface of the container (2), and through which a fluid mixture of gas and oil flows into the container (2); a gas outflow pipe (7) through which gas in the container (2) flows to the outside; and an oil outflow pipe (8) through which oil in the container (2) flows to the outside. The inflow pipe (6) has a pipe wall (6a), and partition walls (6b) or grooves (6c) provided in the flow path inside the pipe wall (6a). An open portion (13), where the pipe wall (6a) is opened on the central-axis side of the inner wall surface of the container (2), is provided at the downstream end (14) of the inflow pipe (6) positioned in the interior of the container (2), and at the open portion (13) the partition walls (6b) or the grooves (6c) are exposed on the central-axis side of the inner wall surface of the container (2).

Description

Oil separator

The present invention relates to an oil separator.

Patent Document 1 discloses an oil separation means having an oil separation space inside so that oil can be separated from the oil mixed refrigerant, one end connected to the compressor, and the other end connected to the oil separation means. A discharge pipe that guides the discharged oil-mixed refrigerant to the oil separation means, and a discharge pipe formed so that at least a part of the oil particles contained in the refrigerant that passes through the discharge pipe flows into the oil separation means in the form of oil droplets. And an oil separator having a formed droplet forming portion.

JP 2006-322701 A

In the oil separator described in Patent Document 1, a circular pipe is used as a discharge pipe for guiding the oil mixed refrigerant discharged from the compressor to the oil separation means. For this reason, the oil flowing through the pipe wall on the inner peripheral side of the oil separation space in the discharge pipe is released at a position away from the inner wall surface of the oil separation space at the downstream end of the discharge pipe in the oil separation space. As a result, oil droplets having a small diameter are difficult to reach the inner wall surface of the oil separation space due to centrifugal force, and flow out to the outside together with the refrigerant. Therefore, there has been a problem that the oil separation efficiency is lowered.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an oil separator that can improve oil separation efficiency.

An oil separator according to the present invention includes a container having a cylindrical inner wall surface and an inflow that is connected to the container along a tangential direction of the inner wall surface and flows a mixed fluid mixed with gas and oil into the container. A pipe, a gas outflow pipe connected to the upper part of the container and flowing out the gas in the container to the outside, and an oil outflow pipe connected to the lower part of the container and flowing out the oil in the container to the outside. The inflow pipe has a pipe wall and a partition wall or a groove provided in a flow path in the pipe wall, and on the downstream end side of the inflow pipe located inside the container An opening portion is provided in which the tube wall on the central axis side of the inner wall surface is opened, and in the opening portion, the partition wall or the groove is exposed on the central axis side of the inner wall surface. is there.

According to the present invention, since the partition wall or the groove is provided in the inside of the inflow pipe, it becomes easy for oil to flow together and generation of small oil droplets that are difficult to centrifuge can be suppressed. Furthermore, since an open portion is provided on the downstream end side of the inflow pipe with the partition wall or groove exposed to the center axis side of the inner wall surface of the container, the oil flowing into the container from the inflow pipe becomes small oil droplets. Scattering can be suppressed. Therefore, according to the present invention, oil separation efficiency can be improved.

It is a perspective view which shows schematic structure of the oil separator 1 which concerns on Embodiment 1 of this invention. It is a perspective sectional view which notched a part of oil separator 1 concerning Embodiment 1 of the present invention. It is sectional drawing which shows an example of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 1 of this invention, and shows the cross section (a) of the piping part 11, and the cross section (b) of the open part 13 collectively. FIG. It is sectional drawing which shows another example of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 1 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. 3 is a cross-sectional view showing a configuration in which a joint portion between an inflow pipe 6 and a shell 3 is cut perpendicularly to the central axis of the shell 3 in the oil separator 1 according to Embodiment 1 of the present invention. FIG. It is a perspective view which shows the structure of the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the modification of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 1 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. It is sectional drawing which shows the modification of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 1 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. 6 is a cross-sectional view showing a configuration in which a joint portion between an inflow pipe 6 and a shell 3 in an oil separator 1 according to Embodiment 2 of the present invention is cut perpendicularly to the central axis of the shell 3. FIG. It is sectional drawing which shows the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 2 of this invention, and is a figure which shows the cross section (a) of the piping part 11, and the cross section (b) of the open part 13 collectively. is there. 6 is a cross-sectional view showing a configuration in which a joint portion between an inflow pipe 6 and a shell 3 in an oil separator 1 according to Embodiment 3 of the present invention is cut perpendicularly to the central axis of the shell 3. FIG. It is sectional drawing which shows the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 3 of this invention, and is a figure which shows the cross section (a) of the piping part 11, and the cross section (b) of the open part 13 collectively. is there. It is a perspective view which shows the structure of the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 4 of this invention. 7 is a cross-sectional view showing a configuration in which a joint portion between an inflow pipe 6 and a shell 3 in an oil separator 1 according to Embodiment 4 of the present invention is cut perpendicularly to the central axis of the shell 3. FIG. It is sectional drawing which shows the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 4 of this invention, and is a figure which shows the cross section (a) of the piping part 11, and the cross section (b) of the open part 13 collectively. is there. It is a perspective view which shows the structure of the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 5 of this invention. It is sectional drawing which shows an example of a structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 5 of this invention, and shows the cross section (a) of the piping part 11, and the cross section (b) of the open part 13 collectively. FIG. It is sectional drawing which shows another example of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 5 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. It is sectional drawing which shows the modification of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 5 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. It is sectional drawing which shows the modification of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 5 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. It is a perspective view which shows the structure of the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 6 of this invention. It is sectional drawing which shows the structure which cut | disconnected the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 6 of this invention perpendicularly | vertically with respect to the central axis of the shell 3. FIG. It is a perspective view which shows the structure of the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 7 of this invention. It is sectional drawing which shows the structure which cut | disconnected the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 7 of this invention perpendicularly | vertically with respect to the central axis of the shell 3. FIG. It is sectional drawing which shows the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 7 of this invention, the cross section (a) of the piping part 11, the cross section (b) of the pipe wall spacing part 23, and the open part 13 It is a figure which shows a cross section (c) collectively. FIG. 9 is a cross-sectional view showing a configuration in which a joint portion between an inflow pipe 6 and a shell 3 in an oil separator 1 according to a modification of Embodiment 7 of the present invention is cut perpendicularly to the central axis of the shell 3. It is sectional drawing which shows the structure of the inflow pipe 6 in the oil separator 1 which concerns on the modification of Embodiment 7 of this invention, the cross section (a) of the piping part 11, the cross section (b) of the pipe wall separation part 23, and open | release It is a figure which shows the cross section (c) of the part 13 collectively. It is a perspective view which shows the structure of the junction part of the inflow pipe 6 and the shell 3 in the oil separator 1 which concerns on Embodiment 8 of this invention. It is sectional drawing which shows the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 8 of this invention, and is a figure which shows the cross section (a) of the piping part 11, and the cross section (b) of the open part 13 collectively. is there. It is sectional drawing which shows the modification of the structure of the inflow pipe 6 in the oil separator 1 which concerns on Embodiment 8 of this invention, and combines the cross section (a) of the piping part 11, and the cross section (b) of the open part 13. FIG. It is sectional drawing which shows another modification of the structure of the inflow tube 6 in the oil separator 1 which concerns on Embodiment 8 of this invention, and the cross section (a) of the piping part 11 and the cross section (b) of the open part 13 are shown. It is a figure shown collectively.

Embodiment 1 FIG.
An oil separator according to Embodiment 1 of the present invention will be described. The oil separator 1 (cyclonic oil separator) according to the present embodiment is one of components of a refrigeration cycle used in, for example, an air conditioner, a refrigerator, a refrigerator, a vending machine, a water heater, and the like. It is. For example, the oil separator 1 is connected to the discharge side of the compressor in the refrigeration cycle, and has a function of separating oil contained in the refrigerant gas discharged from the compressor. The oil separated from the refrigerant gas by the oil separator 1 is returned to the suction side of the compressor through an oil return pipe.

FIG. 1 is a perspective view showing a schematic configuration of an oil separator 1 according to the present embodiment. FIG. 2 is a perspective cross-sectional view in which a part of the oil separator 1 according to the present embodiment (shell 3, upper end plate 4, lower end plate 5) is cut away. In the following drawings including FIG. 1 and FIG. 2, the dimensional relationship and shape of each component may differ from the actual ones. Moreover, the positional relationship (for example, up-down relationship etc.) between each structural member in a specification is a thing when installing the oil separator 1 in the state which can be used in principle.

As shown in FIGS. 1 and 2, the oil separator 1 has a container 2. The container 2 is provided in a cylindrical shell 3 whose inner wall has a circular cross section, an upper end plate 4 provided on the upper portion (the upper end in the axial direction) of the shell 3, and a lower portion (the lower end in the axial direction) of the shell 3. A lower end plate 5. In this example, the shell 3 has a cylindrical shape having a central axis in the vertical direction (for example, vertical vertical direction), the upper end plate 4 has a flat plate shape, and the lower end plate 5. Has a conical taper shape with a diameter reduced downward. The container 2 has a configuration in which the shell 3, the upper end plate 4 and the lower end plate 5 are joined together to be integrated.

The inflow pipe 6 is connected above the outer wall of the shell 3 along the tangential direction (for example, horizontal tangential direction) of the shell 3 (container 2). A gas outflow pipe 7 having a diameter smaller than that of the shell 3 is connected to the upper end plate 4 so as to be coaxial with the shell 3. An oil outflow pipe 8 having a diameter smaller than that of the shell 3 is connected to the lower end plate 5 so as to be coaxial with the shell 3.

As will be described later, the inflow pipe 6 of the present example has a tube wall having a flat or elliptical cross-sectional shape, and a partition wall or a groove provided in a flow path in the tube wall. The major axis in the cross section of the inflow pipe 6 is arranged along the inner wall surface of the shell 3 so as to be parallel to the central axis of the shell 3. The inflow pipe 6 is provided on the downstream end side of the pipe portion 11 provided in the section from the outside to the inside of the container 2 and the inflow pipe 6 located inside the container 2, and is provided on the central axis side of the shell 3. And an open portion 13 in which the tube wall is opened. In the open portion 13, the partition wall or groove is exposed on the central axis side of the shell 3.

The lower end (upstream end) of the gas outflow pipe 7 passes through the upper end plate 4 and is located on the central axis of the inner wall surface of the shell 3. Of the gas outflow pipe 7, the outer wall surface of at least the portion located inside the container 2 has a cylindrical shape. The space in the container 2 formed between the inner wall surface of the shell 3 located above the lower end portion of the gas outflow pipe 7 and the outer wall surface of the gas outflow pipe 7 is gas and oil flowing in from the inflow pipe 6. Is a revolving part 9 that revolves along the inner wall surface of the shell 3. A space surrounded by the inner wall surface of the shell 3 located below the lower end portion of the gas outflow pipe 7 (a space below the swivel portion 9) is a swivel opening portion 10.

A mixed fluid in which gas and oil are mixed (for example, high-pressure gas refrigerant discharged from the compressor) flows into the inflow pipe 6 from the outside. The mixed fluid that has flowed into the inflow pipe 6 flows through the inflow pipe 6 and is released to the swivel portion 9 that is a space in the container 2 at the downstream end of the inflow pipe 6 located in the container 2. In the swivel unit 9, the gas and oil of the mixed fluid flow downward while swirling the swivel unit 9 around the gas outflow pipe 7. While the gas and oil are swirling in the swivel unit 9, the oil having a relatively large specific gravity moves to the radially outer side of the swivel shaft (inner wall surface side of the shell 3) by centrifugal force. When the oil that has moved radially outward reaches the inner wall surface of the shell 3, the oil flows along the inner wall surface. The oil flows along the inner wall surface of the shell 3 even when the oil reaches the swivel opening 10 below the swivel unit 9. On the other hand, the gas flows through the space in the swivel unit 9 and then reaches the space in the swivel release unit 10. Part of the oil that has not reached the inner wall surface of the shell 3 in the swivel unit 9 reaches the inner wall surface of the shell 3 or the lower end plate 5 in the swirl opening unit 10 due to the centrifugal force and gravity due to the remaining swirl motion. The remaining oil gathers together with the gas at the lower end of the gas outflow pipe 7, flows upward in the gas outflow pipe 7, and flows out to the outside. The oil that flows along the inner wall surface of the shell 3 in the swivel opening 10 flows on the inner wall surface as it is due to gravity and reaches the lower end plate 5. The oil that has reached the lower end plate 5 flows down the tapered surface of the lower end plate 5 together with the oil that has reached the lower end plate 5 directly from the space of the swivel opening 10 and collects at the upper end of the oil outflow pipe 8. These oils flow in the oil outflow pipe 8 downward as they are and flow out to the outside.

As described above, the mixed fluid of gas and oil that flows into the container 2 of the oil separator 1 from the inflow pipe 6 includes the gas that flows out from the gas outflow pipe 7 and the oil that flows out from the oil outflow pipe 8 to the outside. And separated. The greater the amount of oil flowing out of the gas outflow pipe 7 together with the gas, the lower the oil separation efficiency. The oil present as oil droplets in the swivel unit 9 or the swirl opening unit 10 is less likely to be separated from the gas because the smaller the oil droplet, the less affected by centrifugal force and gravity.

FIG. 3 is a cross-sectional view showing an example of the configuration of the inflow pipe 6 in the present embodiment, and is a view showing both the cross section (a) of the pipe portion 11 and the cross section (b) of the open portion 13. In the cross section shown in FIG. 3 (for example, a cross section perpendicular to the pipe axis direction (main flow direction)), the major axis a and the minor axis b of the inflow pipe 6 are defined so that a> b. As shown in FIG. 3, the inflow pipe 6 of this example includes a pipe wall 6a having a flat or elliptical cross-sectional shape, and a partition wall 6b provided in a flow path in the pipe wall 6a. Yes. In this example, a plurality of flat partition walls 6b parallel to the minor axis b direction and the tube axis direction are arranged in parallel in the major axis a direction. The flow path inside the inflow pipe 6 is partitioned into a plurality of spaces (flow paths) by the partition wall 6b. The cross-sectional shape of the inflow pipe 6 in the piping part 11 is uniform with respect to the pipe axis direction. Moreover, the cross-sectional shape of the inflow pipe 6 in the open part 13 is uniform with respect to the pipe axis direction. Comparing the cross section of the piping part 11 shown in FIG. 3A with the cross section of the open part 13 shown in FIG. 3B, the pipe part 11 is provided with the pipe wall 6a on the entire outer periphery. On the other hand, the open portion 13 is not provided with a pipe wall 6a corresponding to a half circumference which is the left side (the central axis side of the shell 3) in the drawing with respect to the long axis a. Except for this point, the inflow pipe 6 has the same cross-sectional shape in the pipe portion 11 and the open portion 13. Thereby, in the open part 13, the pipe line provided with the partition wall 6 b is exposed to the center axis side of the shell 3.

FIG. 4 is a cross-sectional view showing another example of the configuration of the inflow pipe 6 in the present embodiment, and is a view showing a cross section (a) of the pipe portion 11 and a cross section (b) of the open portion 13 together. . As shown in FIG. 4, the inflow pipe 6 of this example includes a pipe wall 6a having a flat or elliptical cross-sectional shape, and a plurality of grooves 6c provided on the inner wall surface of the pipe wall 6a. Yes. Each of the grooves 6c has a rectangular cross-sectional shape. In this example, since the groove 6c extends parallel to the pipe axis direction, the cross-sectional shape of the inflow pipe 6 in each of the pipe portion 11 and the open portion 13 is uniform with respect to the pipe axis direction. Comparing the cross section of the pipe part 11 shown in FIG. 4A and the cross section of the open part 13 shown in FIG. 4B, the pipe part 6 is provided with the pipe wall 6a on the entire outer periphery. On the other hand, the open portion 13 is not provided with a pipe wall 6a corresponding to a half circumference which is the left side (the central axis side of the shell 3) in the drawing with respect to the long axis a. Except for this point, the inflow pipe 6 has the same cross-sectional shape in the pipe portion 11 and the open portion 13. Thereby, in the open part 13, the conduit provided with the groove 6 c is exposed to the center axis side of the shell 3.

As shown in FIGS. 3 and 4, the inflow pipe 6 provided with the partition wall 6b or the groove 6c has a larger surface area on the inner wall surface than the smooth pipe without the partition wall and the groove. As the surface area of the inner wall surface increases, the shearing force acting in the direction of stopping the flow received by the oil from the inner wall surface increases. For this reason, when the surface area of an inner wall surface becomes large, the flow velocity of the oil which flows along an inner wall surface will fall. As the flow velocity decreases, the oil tends to flow together. In particular, in a pipe line where the distance between inner wall surfaces such as corners is short, oil tends to flow together due to the effect of capillary force. When oil flows together, the generation of small oil droplets that are difficult to centrifuge is suppressed.

FIG. 5 is a cross-sectional view showing a configuration in which a joint portion between the inflow pipe 6 and the shell 3 is cut perpendicularly to the central axis of the shell 3. FIG. 6 is a perspective view showing a configuration of a joint portion between the inflow pipe 6 and the shell 3. As shown in FIGS. 5 and 6, the inflow pipe 6 and the shell 3 are configured such that the long axis a (not shown in FIGS. 5 and 6) of the inflow pipe 6 is parallel to the central axis of the shell 3. b is connected so as to be perpendicular to the central axis of the shell 3. The inflow pipe 6 is connected along the tangential direction of the inner wall surface of the shell 3. The outer wall of the downstream end 14 of the inflow pipe 6 is in contact with the inner wall surface of the shell 3. Since the short axis b of the inflow pipe 6 is arranged perpendicularly to the central axis of the shell 3, the oil swirls in the inflow pipe 6 at a position closer to the inner wall surface of the shell 3 than the circular pipe having the same flow rate in the pipe. It is easy to open to the part 9. The oil released to the swivel unit 9 at a position close to the inner wall surface of the shell 3 is likely to reach the inner wall surface of the shell 3 because the radial movement distance due to centrifugal force is shortened. Therefore, the oil separation efficiency is improved.

The inflow pipe 6 is provided on the downstream end 14 side of the inflow pipe 6 located inside the container 2 and the pipe portion 11 provided in a section extending from the outside to the inside of the container 2 and a part of the inside of the container 2. And an open portion 13 in which the tube wall 6a on the center axis side (gas outflow pipe 7 side) of the shell 3 is opened. In the open portion 13, the partition wall 6 b (or groove 6 c) is exposed on the center axis side of the shell 3. In the pipe part end part 12 which becomes a boundary between the pipe part 11 and the open part 13, the inner wall surface of the pipe line in the pipe part 11 and the inner wall surface of the pipe line in the open part 13 are continuously connected. Yes. Thereby, in the state where the mixed fluid in which gas and oil are mixed flows in the inflow pipe 6, the oil flowing along the inner wall surface such as the partition wall 6b and the groove 6c in the pipe portion 11 is After passing through the pipe end 12, the pipe flows through the open portion 13 along the inner wall surface. A part of the oil flowing along the inner wall surface of the partition wall 6b on the side opened by the opening portion 13 (the central axis side of the shell 3) is not It merges with the oil flowing through the opening 13 along the inner wall surface and flows together. Of the oil flowing along the inner wall surface of the partition wall 6b on the side opened by the opening portion 13, the oil that has not merged with the other oil at the pipe portion end portion 12 is scattered in the gas flow. Since the gas flow opened to the swivel unit 9 in the vessel 2 at the pipe end 12 is faster than the gas flow in the space on the central axis side of the shell 3, a strong shearing force is generated due to the speed difference. As a result, the gas flow in the space on the central axis side of the shell 3 is drawn to the inner wall surface side of the shell 3, so that the gas flow released to the swivel portion 9 at the pipe portion end 12 is applied to the inner wall surface of the opening portion 13. It can be held along. Therefore, the oil scattered in the gas flow can easily merge with the oil flowing along the inner wall surface of the open portion 13.

As the gas flow along the open portion 13 proceeds downstream, the flow velocity gradually decreases due to the shear force due to the speed difference from the gas flow in the space on the central axis side of the shell 3. For this reason, the oil flowing along the inner wall surface of the opening 13 has a reduced shearing force from the gas flow and a reduced flow velocity. By storing the mass flow rate, the oil flowing along the inner wall surface of the open portion 13 becomes thicker as the flow velocity becomes lower and flows together. The oil that flows together along the inner wall surface of the opening portion 13 is released to the turning portion 9 at the downstream end 14 of the opening portion 13. When the oil is opened to the swivel unit 9 at the downstream end 14, the shearing force received from the gas flow is weakened, so that it is difficult for the oil to scatter as small oil droplets. Further, since the oil is collected and the weight is increased and the centrifugal force is strongly received, it becomes easy to reach the inner wall surface of the shell 3 at the turning portion 9. Thereby, the separation efficiency of oil improves.

If the opening part 13 is not provided, the oil is opened directly to the swivel part 9 from the downstream end of the pipe part 11, so that a large flow rate difference occurs between the oil and the surrounding gas flow. For this reason, since the shear force which oil receives from a gas flow becomes strong, oil becomes easy to be divided into small oil droplets. Also, since there is a difference in the surrounding gas flow velocity, the shearing force received by the oil from the surroundings varies and disturbance occurs, so that the oil is easily separated into small oil droplets. Moreover, in the open part 13, the oil whose flow velocity fell and the layer became thick can be received by the partition wall 6b or the groove | channel 6c, and can be collected. For this reason, if the opening part 13 is not provided, the oil spreads around and easily scatters.

As the length of the open portion 13 in the tube axis direction is longer, the difference in flow rate between the oil and the gas flow is reduced, and the section where the oil is collected becomes longer, so that a higher effect can be obtained. Moreover, in the open part 13, since oil gathers and an oil film becomes thick as it goes downstream, it is necessary to ensure the height of the partition wall 6b or the depth of the groove | channel 6c for catching oil. Accordingly, a configuration in which the height of the partition wall 6b is gradually reduced after opening, or a configuration in which the depth of the groove 6c is gradually shallowed after opening (for example, the downstream end of the pipe portion 11 is set to the tube axis direction). A sufficient effect cannot be obtained with a configuration in which the taper is cut obliquely and has a tapered shape.

7 and 8 are cross-sectional views showing modified examples of the configuration of the inflow pipe 6, and are both a cross-section (a) of the pipe portion 11 and a cross-section (b) of the open portion 13. In the example shown in FIG. 7, the cross sections of the plurality of spaces partitioned by the partition wall 6b are each circular. In the example shown in FIG. 8, the cross-sectional shape of the groove 6 c is a triangular shape, and the inner wall surface of the conduit of the inflow pipe 6 is a straight wave shape. The inner wall surface of the pipe line of the inflow pipe 6 may have a curved wave shape. The same effects as described above can be obtained by the configuration shown in FIGS.

Embodiment 2. FIG.
An oil separator according to Embodiment 2 of the present invention will be described. FIG. 9 is a cross-sectional view showing a configuration in which the joint portion between the inflow pipe 6 and the shell 3 in the present embodiment is cut perpendicularly to the central axis of the shell 3. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the first embodiment, the configuration in which the inflow pipe 6 is integrated is illustrated. However, the inflow pipe 6 in the present embodiment has a configuration in which two grooved plates are combined so that the grooves face each other. .

As shown in FIG. 9, the inflow pipe 6 in the present embodiment has a configuration in which two grooved plates (inner peripheral side grooved plate 15 and outer peripheral side grooved plate 16) are combined and joined. At the joint between the inflow pipe 6 and the shell 3, the inner circumferential grooved plate 15 is disposed on the center axis side of the shell 3, and the outer circumferential grooved plate 16 is disposed on the inner wall surface side of the shell 3. The length in the tube axis direction of the inner circumferential grooved plate 15 is shorter than the length in the tube axis direction of the outer circumferential grooved plate 16. Using the difference in length between the inner circumferential grooved plate 15 and the outer circumferential grooved plate 16, only the piping part 11 provided with the inner circumferential grooved plate 15 and the outer circumferential grooved plate 16 and the outer circumferential grooved plate 16 were provided. An opening 13 is formed.

FIG. 10 is a cross-sectional view showing the configuration of the inflow pipe 6 in the present embodiment, and is a view showing the cross section (a) of the pipe portion 11 and the cross section (b) of the open portion 13 together. As shown in FIG. 10, the inner circumferential grooved plate 15 and the outer circumferential grooved plate 16 are joined by a plane parallel to the major axis a direction and the tube axis direction of the inflow pipe 6. In this example, the inner peripheral grooved plate 15 and the outer peripheral grooved plate 16 have the same cross-sectional shape. The structure of the piping part 11 of the inflow pipe 6 after joining is the same as the structure of the piping part 11 of the inflow pipe 6 shown in FIG. Moreover, the structure of the open part 13 of the inflow pipe 6 after joining is the inflow shown in FIG. 3B except that the height of the partition wall 6b is reduced (in this example, the height is halved). The configuration is the same as that of the open portion 13 of the tube 6. The height of the partition wall 6 b in the open part 13 is constant in the section from the pipe part end 12 to the downstream end 14.

When manufacturing the inflow pipe 6 of Embodiment 1, it is necessary to mold the piping part 11 and the open part 13 in one member, respectively. On the other hand, the inflow pipe 6 of the present embodiment can be manufactured by combining the inner peripheral grooved plate 15 and the outer peripheral grooved plate 16 that can be easily molded. Therefore, according to the present embodiment, in addition to obtaining the same effect as that of the first embodiment, the effect of facilitating the manufacture of the inflow pipe 6 is also obtained.

Embodiment 3 FIG.
An oil separator according to Embodiment 3 of the present invention will be described. FIG. 11 is a cross-sectional view showing a configuration in which the joint portion between the inflow pipe 6 and the shell 3 in the present embodiment is cut perpendicularly to the central axis of the shell 3. FIG. 12 is a cross-sectional view showing the configuration of the inflow pipe 6 in the present embodiment, and is a view showing both the cross section (a) of the pipe portion 11 and the cross section (b) of the open portion 13. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 11 and 12, the inflow pipe 6 in the present embodiment includes an outer pipe 17 that forms an outer wall (pipe wall) and has a flat or elliptical cross-sectional shape, and is disposed inside the outer pipe 17. The grooved plate 18 is provided. The length of the outer tube 17 in the tube axis direction is shorter than the length of the grooved plate 18 in the tube axis direction. Using the difference in length between the outer tube 17 and the grooved plate 18, the piping part 11 having the outer tube 17 and the grooved plate 18 and the opening part 13 having only the grooved plate 18 are formed. Yes.

The grooved plate 18 of this example was erected along the short axis b direction on the bottom surface part 18a and the bottom surface part 18a having a cross-sectional shape extending in the long axis a direction along the inner wall surface of the outer peripheral tube 17. A plurality of wall portions 18b. The wall portion 18b functions as a partition wall that partitions the flow path in the inflow pipe 6 into a plurality of spaces. A groove is formed between the adjacent wall portions 18b. Further, the bottom surface portion 18 a constitutes a tube wall of the inflow tube 6 together with the outer peripheral tube 17.

In the configuration of the present embodiment, since the outer periphery of the portion of the inflow pipe 6 located outside the container 2 is covered with the outer peripheral pipe 17, the sealing process of the joint portion between the constituent members of the inflow pipe 6 is not required. Therefore, manufacture of the inflow pipe 6 becomes easy.

Here, similarly to the configuration of the second embodiment, two grooved plates (for example, the inner circumferential grooved plate 15 and the outer circumferential grooved plate 16) may be combined, and the outer side may be covered with the outer circumferential tube 17. . Also in this structure, since the outer periphery of the part located outside the container 2 in the inflow pipe 6 is covered with the outer peripheral pipe 17, a sealing process is not required for the joint portion between the two grooved plates. Therefore, in addition to obtaining the same effect as in the second embodiment, the effect of facilitating the manufacture of the inflow pipe 6 is also obtained.

Embodiment 4 FIG.
An oil separator according to Embodiment 4 of the present invention will be described. FIG. 13 is a perspective view showing a configuration of a joint portion between the inflow pipe 6 and the shell 3 in the present embodiment. FIG. 14 is a cross-sectional view showing a configuration in which the joint portion between the inflow pipe 6 and the shell 3 in this embodiment is cut perpendicularly to the central axis of the shell 3. FIG. 15 is a cross-sectional view showing the configuration of the inflow pipe 6 in the present embodiment, and is a view showing both the cross section (a) of the pipe portion 11 and the cross section (b) of the open portion 13. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 13 to 15, the inflow pipe 6 in the present embodiment includes an outer pipe 17 that forms an outer wall (pipe wall) and has a flat or elliptical cross-sectional shape, and is disposed inside the outer pipe 17. Partition plate 19 (grooved plate). The partition plate 19 is formed in a linear wave shape (triangular wave shape), and extends in the major axis a direction of the inflow pipe 6 as a whole. The corners (the tops of the waves) of the partition plate 19 are, for example, acute angles, and are alternately in contact with the two inner wall surfaces of the outer peripheral pipe 17 facing each other across the partition plate 19. The partition plate 19 may be formed in a curved wave shape. The partition plate 19 functions as a partition wall that partitions the flow path in the inflow pipe 6 into a plurality of spaces, and the inside of the corner also functions as a groove. The length of the outer peripheral tube 17 in the tube axis direction is shorter than the length of the partition plate 19 in the tube axis direction. Using the difference in length between the outer peripheral tube 17 and the partition plate 19, the pipe portion 11 including the outer peripheral tube 17 and the partition plate 19 and the open portion 13 including only the partition plate 19 are formed. In the present embodiment, in the open portion 13, the partition plate 19 (partition wall) is exposed not only on the central axis side of the shell 3 but also on the inner wall surface side of the shell 3.

In the open portion 13 of the inflow pipe 6, the flow path is divided on both sides of the partition plate 19, so that the flow path of the open portion 13 exists not only on the central axis side of the shell 3 but also on the inner wall surface side of the shell 3. become. Since the open space of the flow path on the inner wall surface side of the shell 3 in the open portion 13 is narrow, it is difficult for gas and oil to flow. As a result, most of the gas and oil concentrate in the flow path on the central axis side of the shell 3. For this reason, the flow rate of the gas is reduced in the flow path on the inner wall surface side of the shell 3, so that the oil easily flows along the corner (groove). The oil that has flowed through the flow path on the inner wall surface side of the shell 3 is released to the inner wall surface side of the shell 3 at the downstream end 14. The oil scattered in the gas flow in the flow path on the inner wall surface side of the shell 3 immediately reaches the inner wall surface of the shell 3 because the distance from the inner wall surface of the shell 3 is short. On the other hand, in the flow path on the central axis side of the shell 3, the oil separation efficiency is improved by the same action as in the first embodiment. As a result, the present embodiment can provide substantially the same effect as in the first embodiment.

The partition plate 19 is covered with the outer peripheral pipe 17 in the pipe portion 11, and both surfaces of the partition plate 19 are inside the container 2 in the open portion 13. For this reason, since the partition plate 19 is hard to receive the stress by a static pressure difference, it can be comprised with a thin board. By configuring the partition plate 19 with a thin plate, the reduction in the flow passage cross-sectional area of the inflow pipe 6 due to the thickness of the partition plate 19 is reduced. Therefore, the number of folding of the partition plate 19 is increased and the inner wall area of the inflow pipe 6 is increased. Can be increased. By increasing the inner wall area of the inflow pipe 6, the flow rate of oil flowing along the inner wall surface can be increased and the oil can be collected and released into the container 2, so that the oil separation efficiency is improved.

In this example, the downstream end 14 of the partition plate 19 is in contact with the inner wall surface of the shell 3 in the open portion 13. Thereby, since the flow path on the central axis side of the shell 3 in the partition plate 19 and the inner wall surface of the shell 3 can be brought into contact with each other at an angle close to parallel, the oil flowing through the flow path of the shell 3 at the downstream end 14 When moving to the inner wall surface, the oil is less likely to be scattered due to the disturbance due to the sudden bending of the flow path. Further, the oil flowing through the flow path on the inner wall surface side of the shell 3 in the partition plate 19 is less likely to be disturbed in the flow because the flow in the direction other than the main flow is reduced. In addition, since the distance between the flow path and the inner wall surface of the shell 3 is reduced, the oil flowing through the flow path easily reaches the inner wall surface of the shell 3.

Embodiment 5 FIG.
An oil separator according to Embodiment 5 of the present invention will be described. FIG. 16 is a perspective view showing a configuration of a joint portion between the inflow pipe 6 and the shell 3 in the present embodiment. FIG. 17 is a cross-sectional view showing an example of the configuration of the inflow pipe 6 in the present embodiment, and is a view showing both the cross section (a) of the pipe portion 11 and the cross section (b) of the open portion 13. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 16 and 17, the inflow pipe 6 of the present embodiment has a configuration in which a plurality of circular pipes 20 are arranged in parallel in one direction (a direction parallel to the central axis of the shell 3). And has a flat cross-sectional shape as a whole. The open portion 13 has a structure in which the semicircular portion on the central axis side of the shell 3 is removed in each of the plurality of circular tubes 20 and the semicircular portion 20a on the inner wall surface side of the shell 3 remains. In the open part 13, the semicircular parts 20 a are closely contacted or joined together without any gaps, so that a whole oil receiving tray is obtained. Even if oil is collected in each semicircular portion 20a and the oil film becomes thick, and oil overflows from the semicircular portion 20a, it merges with the oil in the adjacent semicircular portion 20a due to surface tension and flows to the downstream end 14 collectively. become.

FIG. 18 is a cross-sectional view showing another example of the configuration of the inflow pipe 6 in the present embodiment, and is a view showing a cross section (a) of the pipe portion 11 and a cross section (b) of the open portion 13 together. . As shown in FIG. 18, the inflow pipe 6 of the present example has a configuration in which a plurality of square tubes 21 are joined in parallel in one direction (a direction parallel to the central axis of the shell 3). As a flat cross-sectional shape. The open portion 13 has a structure in which one side of the central axis side of the shell 3 is removed from each of the plurality of square tubes 21 and the U-shaped portion 21a formed by the other three sides remains.

The same effects as those of the first embodiment can be obtained by the configuration of the present embodiment shown in FIGS. The inflow pipe 6 is configured by using a circular pipe 20 and a square pipe 21 that are relatively easily available and inexpensive mass-produced products. Thereby, since an effect is acquired without using a flat tube or an elliptical tube, the manufacturing cost of the inflow pipe 6 and the oil separator 1 can be reduced.

19 and 20 are cross-sectional views showing a modification of the configuration of the inflow pipe 6 in the present embodiment, and are a view showing a cross-section (a) of the pipe portion 11 and a cross-section (b) of the open portion 13 together. It is. The inflow pipe 6 shown in FIG. 19 has a configuration in which a plurality of circular pipes 20 arranged in one direction are arranged inside an outer peripheral pipe 17 having a flat cross-sectional shape. The open portion 13 has a structure in which a portion on the central axis side of the shell 3 is removed from each of the outer peripheral tube 17 and the plurality of circular tubes 20. The inflow pipe 6 shown in FIG. 20 has a U-shaped portion 21a in which one side of the square tube (one side on the central axis side of the shell 3) is removed inside the outer pipe 17 having a flat (rectangular) cross-sectional shape. , A plurality of components arranged in parallel in one direction. The piping part 11 of the inflow pipe 6 includes an outer peripheral pipe 17 and a plurality of U-shaped parts 21a, and the open part 13 of the inflow pipe 6 includes only a plurality of U-shaped parts 21a.

19 and FIG. 20 is a combination of the present embodiment and the third embodiment. In these modified examples, the outer pipes 20 or the outer sides of the U-shaped portions 21a of the plurality of square tubes are covered with the outer peripheral pipe 17, thereby joining the pipes (the circular pipes 20 or the U-shaped parts 21a). Processing, joining processing of the shell 3 and the inflow pipe 6, and sealing processing of the inflow pipe 6 are facilitated.

Embodiment 6 FIG.
An oil separator according to Embodiment 6 of the present invention will be described. FIG. 21 is a perspective view showing a configuration of a joint portion between the inflow pipe 6 and the shell 3 in the present embodiment. FIG. 22 is a cross-sectional view showing a configuration in which the joint portion between the inflow pipe 6 and the shell 3 in this embodiment is cut perpendicularly to the central axis of the shell 3. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 21 and 22, in the present embodiment, the open part 13 from the pipe part end 12 to the downstream end 14 is joined to the inner wall surface of the shell 3 (container 2), or the shell 3. It is molded integrally with the inner wall surface. That is, in the present embodiment, a plurality of partition walls 22 are formed in a part of the inner wall surface of the shell 3 in the circumferential direction. Each partition wall 22 is formed in an arc shape along the inner wall surface of the shell 3. In the inflow pipe 6, the wall surface of the partition wall 6 b formed inside the inflow pipe 6 (pipe portion 11) and the wall surface of the partition wall 22 formed in the inner wall surface of the shell 3 are continuously connected to each other. Are joined together. In the open part 13, the partition wall 22 formed continuously from the pipe line in the inflow pipe 6 is exposed to the central axis side of the inner wall surface of the shell 3. When a plurality of grooves 6 c are provided in the inflow pipe 6, a plurality of grooves corresponding to the grooves 6 c may be provided on the inner wall surface of the shell 3. In this case, the inflow pipe 6 is joined so that the wall surface of the groove 6 c formed inside the inflow pipe 6 and the wall surface of the groove formed on the inner wall surface of the shell 3 are continuously connected to each other. .

According to the present embodiment, since the length of the open portion 13 can be easily increased, a gas flow flowing along the open portion 13, a gas flow flowing on the central axis side of the inner wall surface of the shell 3, The section for decreasing the speed difference can be lengthened. Therefore, the flow velocity of the oil flowing along the inner wall surface at the downstream end 14 of the opening portion 13 decreases and flows together, and the shear force received when the oil is released to the swiveling portion 9 is weakened. The amount of oil can be reduced. Therefore, the oil separation efficiency can be improved. Moreover, since the open part 13 of this example is formed in circular arc shape, the gas and oil which flow through the open part 13 receive centrifugal force similarly to the turning part 9. Therefore, the amount of oil flowing along the inner wall surface of the open portion 13 can be increased, and the oil separation efficiency can be improved.

Here, when the groove corresponding to the groove 6 c is provided on the inner wall surface of the shell 3, the depth of the groove on the inner wall surface of the shell 3 is gradually decreased toward the downstream end 14 of the opening portion 13. The groove may disappear at the downstream end 14. Thereby, the bottom face of the groove and the inner wall surface of the shell 3 can be continuously connected. If the oil flowing along the inner wall surface of the shell 3 has a step or a discontinuous surface, the flow is disturbed due to the drift and is likely to be scattered. As described above, by continuously connecting the bottom surface of the groove and the inner wall surface of the shell 3, it is possible to prevent the oil from being scattered, so that the oil separation efficiency can be improved.

Embodiment 7 FIG.
An oil separator according to Embodiment 7 of the present invention will be described. FIG. 23 is a perspective view showing a configuration of a joint portion between the inflow pipe 6 and the shell 3 in the present embodiment. FIG. 24 is a cross-sectional view showing a configuration in which the joint portion between the inflow pipe 6 and the shell 3 in the present embodiment is cut perpendicularly to the central axis of the shell 3. FIG. 25 is a cross-sectional view showing the configuration of the inflow pipe 6 in the present embodiment. The cross section (a) of the pipe portion 11, the cross section (b) of the pipe wall spacing portion 23, and the cross section (c) of the open portion 13. FIG. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 23 and 24, the inflow pipe 6 in the present embodiment has a pipe wall separating portion 23 provided in a section from the outside to the inside of the container 2 (shell 3). The pipe wall separation part 23 is located between the pipe part 11 and the open part 13 in the pipe axis direction of the inflow pipe 6. That is, the piping part 11 is located outside the shell 3, and the opening part 13 is located inside the shell 3.

As shown in FIGS. 25A and 25C, the piping part 11 and the opening part 13 have the same cross-sectional shape as the piping part 11 and the opening part 13 shown in FIGS. 3A and 3B. ing. As shown in FIG. 25 (b), the tube wall separation portion 23 has a configuration in which a separation wall 24 located on the center axis side of the shell 3 and opened by the opening portion 13 is separated from the partition wall 6 b. Here, the separation wall 24 is a part of the tube wall 6 a, and the separation wall 24 in this example is a half-circular tube wall 6 a located on the center axis side of the shell 3. The inner wall surface of the separation wall 24 is a smooth surface without a groove. Grooves continuously connected to the tube wall 6a and the partition wall 6b of the piping part 11 are formed in the tube wall 6a facing the separation wall 24. As shown in FIGS. 23 to 25, the pipe wall spacing portion 23 is expanded in the minor axis b direction (the spacing wall 24 side) with respect to the piping portion 11. Thereby, the length of the short axis c in the pipe wall separation | separation part 23 is expanded rather than the short axis b in the piping part 11 (a> c> b).

FIG. 26 is a cross-sectional view showing a configuration in which a joint portion between the inflow pipe 6 and the shell 3 is cut perpendicularly to the central axis of the shell 3 in a modification of the present embodiment. FIG. 27 is a cross-sectional view showing the configuration of the inflow pipe 6 in this modification, and shows a cross section (a) of the pipe part 11, a cross section (b) of the pipe wall separating part 23, and a cross section (c) of the open part 13. It is a figure shown collectively. The inflow pipe 6 shown in FIGS. 26 and 27 has a pipe wall separating portion 23 located between the pipe portion 11 and the open portion 13 in the pipe axis direction, like the inflow pipe 6 shown in FIGS. Have.

As shown in FIGS. 27 (a) and (c), the piping part 11 and the opening part 13 have the same cross-sectional shape as the piping part 11 and the opening part 13 shown in FIGS. 10 (a) and 10 (b). ing. As shown in FIG. 27 (b), the tube wall separating portion 23 is located on the center axis side of the shell 3, and a separating wall 24 (for example, a tube wall 6 a for a half circumference) opened by the opening portion 13 is a partition wall 6 b. It has the structure spaced apart from. In the present modification, the tube wall separation portion 23 is not expanded with respect to the piping portion 11. The height of the partition wall 6b at the pipe wall separation portion 23 is shortened in the minor axis b direction with respect to the partition wall 6b at the pipe portion 11. Thereby, the pipe wall separation part 23 has a configuration in which the separation wall 24 (for example, the pipe wall 6a for a half circumference) opened by the opening part 13 is separated from the partition wall 6b. Even in the configuration of this modification, the tube wall separation portion 23 can be formed between the piping portion 11 and the opening portion 13 in the same manner as the configuration shown in FIGS.

The oil in the inflow pipe 6 is close to the wall (the pipe wall 6a or the partition wall 6b) in the inflow pipe 6 due to the effects of inertial force, viscous force and surface tension, and tends to flow in a region where the flow is slow. For this reason, the oil in the tube wall separation portion 23 is along the opposite side of the separation wall 24 in which the gap between the walls is narrowed by forming a groove rather than the separation wall 24 side which is a smooth surface. Easy to flow. Therefore, in the pipe wall separation part 23, the oil flowing along the separation wall 24 decreases and the oil flowing along the facing side of the separation wall 24 increases as it goes downstream. When the pipe wall separation part 23 does not exist, the oil flowing along the pipe wall surface located on the center axis side of the shell 3 is not collected in the pipe wall 6a of the open part 13 at the pipe part end part 12 as it is. It will scatter to the turning part 9. On the other hand, in this embodiment, since the amount of oil flowing along the separation wall 24 located on the center axis side of the shell 3 can be reduced, the amount of oil scattered on the swivel unit 9 can be reduced. . Therefore, according to the present embodiment, the oil separation efficiency can be improved.

Embodiment 8 FIG.
An oil separator according to Embodiment 8 of the present invention will be described. FIG. 28 is a perspective view illustrating a configuration of a joint portion between the inflow pipe 6 and the shell 3 in the present embodiment. FIG. 29 is a cross-sectional view showing the configuration of the inflow pipe 6 in the present embodiment, and is a view showing the cross section (a) of the pipe portion 11 and the cross section (b) of the open portion 13 together. In addition, about the component which has the same function and effect | action as

Embodiment

1, 3, 4 etc., the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 28 and FIG. 29, the inflow pipe 6 in the present embodiment is not a flat or elliptical pipe but a circular pipe. Specifically, the inflow pipe 6 includes a pipe wall 6a having a circular cross-sectional shape and a partition wall 6b provided in a flow path in the pipe wall 6a. In this example, a plurality of flat partition walls 6b parallel to the tube axis direction are parallel to each other. Comparing the cross section of the piping part 11 shown in FIG. 29 (a) with the cross section of the open part 13 shown in FIG. 29 (b), the pipe part 6 is provided with the pipe wall 6a on the entire outer periphery. On the other hand, the open portion 13 is not provided with a pipe wall 6a corresponding to a half circumference on the left side (the central axis side of the shell 3) in the drawing. Except for this point, the inflow pipe 6 has the same cross-sectional shape in the pipe portion 11 and the open portion 13. Thereby, in the open part 13 located in the shell 3, the pipe line provided with the partition wall 6b is exposed to the center axis side of the shell 3.

FIG. 30 is a cross-sectional view showing a modified example of the configuration of the inflow pipe 6 in the present embodiment, and is a view showing a cross section (a) of the pipe portion 11 and a cross section (b) of the open portion 13 together. As shown in FIG. 30, the inflow pipe 6 of this modification includes an outer pipe 17 that forms an outer wall (pipe wall) and has a circular cross-sectional shape, and a grooved plate 18 that is disposed inside the outer pipe 17. ,have. That is, the inflow pipe 6 of this modification has the same configuration as the inflow pipe 6 of the third embodiment shown in FIGS. 11 and 12 except that the cross-sectional shape is circular. The length of the outer tube 17 in the tube axis direction is shorter than the length of the grooved plate 18 in the tube axis direction. Using the difference in length between the outer tube 17 and the grooved plate 18, the piping part 11 having the outer tube 17 and the grooved plate 18 and the opening part 13 having only the grooved plate 18 are formed. Yes. In the open portion 13 located in the shell 3, the grooved plate 18 is exposed to the center axis side of the shell 3.

FIG. 31 is a cross-sectional view showing another modified example of the configuration of the inflow pipe 6 in the present embodiment, and shows a cross-section (a) of the pipe portion 11 and a cross-section (b) of the open portion 13 together. is there. As shown in FIG. 31, the inflow pipe 6 of the present modification includes an outer pipe 17 that forms an outer wall (pipe wall) and has a circular cross-sectional shape, and a partition plate 19 (groove) disposed inside the outer pipe 17. Board). That is, the inflow pipe 6 of this modification has the same configuration as the inflow pipe 6 of the fourth embodiment shown in FIGS. 14 and 15 except that the cross-sectional shape is circular. The length of the outer peripheral tube 17 in the tube axis direction is shorter than the length of the partition plate 19 in the tube axis direction. Using the difference in length between the outer peripheral tube 17 and the partition plate 19, the pipe portion 11 including the outer peripheral tube 17 and the partition plate 19 and the open portion 13 including only the partition plate 19 are formed. In the opening part 13 located in the shell 3, the partition plate 19 is exposed to the center axis side of the shell 3.

As described above, the inflow pipe 6 in the present embodiment has a configuration in which the cross-sectional shape of the inflow pipe 6 in the third and fourth embodiments is changed from a flat shape or an elliptical shape to a circular shape. In addition, in the inflow pipe 6 in the present embodiment, the cross-sectional shape of the inflow pipe 6 in the embodiments other than the third and fourth embodiments (for example, the first, second, and fifth to seventh embodiments) is changed to a circular shape. You may have a structure.

In the present embodiment, compared to the configuration in which the inflow pipe 6 has a flat or elliptical cross-sectional shape, oil is less likely to be opened at a position near the inner wall surface of the shell 3 at the downstream end 14 of the inflow pipe 6. The oil separation efficiency may be slightly reduced. However, in the present embodiment, since the open portion 13 where the grooved plate 18 or the partition plate 19 is exposed on the central axis side of the shell 3 is provided on the downstream end 14 side of the inflow tube 6, It is possible to suppress the oil flowing into the shell 3 from being scattered as small oil droplets. Therefore, according to this Embodiment, compared with the structure described in patent document 1, for example, the separation efficiency of oil can be improved.

Further, according to the present embodiment, since the processing is facilitated by making the inflow pipe 6 into a circular pipe, the productivity of the inflow pipe 6 and the oil separator 1 can be improved.

Furthermore, since the strength of the inflow pipe 6 can be increased by using the inflow pipe 6 as a circular pipe, the deformation of the inflow pipe 6 can be made difficult even if the pressure inside the oil separator 1 becomes higher. Therefore, according to the present embodiment, the pressure resistance of the inflow pipe 6 and the oil separator 1 can be improved.

As described above, the oil separator 1 according to Embodiments 1 to 8 described above is disposed in the container 2 along the tangential direction of the container 2 (shell 3) having a cylindrical inner wall surface and the inner wall surface of the container 2. An inflow pipe 6 for connecting a mixed fluid in which gas and oil are mixed into the container 2, a gas outflow pipe 7 for connecting the gas in the container 2 to the outside, connected to the upper part of the container 2, and the container 2 An oil outflow pipe 8 connected to the lower part and allowing oil in the container 2 to flow out to the outside. The inflow pipe 6 includes a pipe wall 6a and a partition wall 6b or a groove provided in a flow path in the pipe wall 6a. 6c, and on the downstream end 14 side of the inflow pipe 6 located inside the container 2, an opening portion 13 in which the tube wall 6a on the central axis side of the inner wall surface of the container 2 is opened is provided. In the open part 13, the partition wall 6 b or the groove 6 c is exposed on the central axis side of the inner wall surface of the container 2. That.

According to this configuration, since the partition wall 6b or the groove 6c is provided in the inside of the inflow pipe 6, it becomes easy for oil to flow together and generation of small oil droplets that are difficult to centrifuge can be suppressed. Furthermore, the downstream end 14 side of the inflow pipe 6 is provided with an open portion 13 in which the partition wall 6b or the groove 6c is exposed on the central axis side of the inner wall surface of the container 2, so that the inflow pipe 6 enters the container 2. It can suppress that the oil which flowed in is scattered as a small oil droplet. Therefore, the oil separation efficiency can be improved. Moreover, the oil separation efficiency in the oil separator 1 is improved, so that an appropriate amount of oil can be held in the compressor of the refrigeration cycle. For this reason, the lifetime improvement and energy saving of a compressor are realizable.

Further, in the oil separator 1 according to the above embodiment, the inflow pipe 6 has a configuration in which two grooved plates (for example, the inner circumferential grooved plate 15 and the outer circumferential grooved plate 16) are joined.

According to this configuration, since the inflow tube 6 can be configured using a plate having a uniform cross-sectional shape in the tube axis direction, the manufacturing process is facilitated.

In the oil separator 1 according to the above embodiment, the inflow pipe 6 includes the outer peripheral pipe 17 constituting the pipe wall 6a, and the partition plate 19 or the grooved plate 18 disposed inside the outer peripheral pipe 17. It is what you have.

According to this configuration, since the sealing process is not required at the joint between the outer peripheral tube 17 and the partition plate 19 or the grooved plate 18, the manufacturing process of the inflow tube 6 is facilitated.

Further, in the oil separator 1 according to the above embodiment, the partition plate 19 has a linear or curved wavy cross-sectional shape.

According to this configuration, since the partition plate 19 can be configured with a thin member, the surface area inside the inflow pipe 6 can be easily increased. Thereby, the separation efficiency of the oil can be further improved, and the manufacturing process of the inflow pipe 6 is facilitated.

Further, in the oil separator 1 according to the above-described embodiment, the inflow pipe 6 has a configuration in which a plurality of pipes (for example, a circular pipe or a square pipe) arranged in parallel in one direction are joined.

According to this configuration, the inflow pipe 6 can be configured with an inexpensive member.

In addition, in the oil separator 1 according to the above-described embodiment, the inflow pipe 6 includes the outer pipe 17 constituting the pipe wall 6a and a plurality of pipes (for example, circles) arranged inside the outer pipe 17 and arranged in parallel in one direction. Tube or square tube).

Further, in the oil separator 1 according to the above embodiment, in the open portion 13, the partition wall 22 or the groove is provided on the inner wall surface of the container 2, and the partition wall 22 or the groove provided on the inner wall surface of the container 2. And the partition wall 6b or the groove | channel 6c provided in the flow path in the pipe wall 6a is connected continuously. In the oil separator 1 according to the above embodiment, the partition wall 22 or the groove provided on the inner wall surface of the container 2 is provided in an arc shape along the inner wall surface of the container 2.

According to this configuration, since the length of the open portion 13 can be easily increased, it is possible to further suppress the oil from being scattered as small oil droplets and improve the oil separation efficiency.

Further, in the oil separator 1 according to the above embodiment, the tube wall 6a has a flat or elliptical cross-sectional shape, and the long axis a in the cross section of the inflow tube 6 is the inner wall surface of the container 2. It is arranged parallel to the central axis.

According to this configuration, since the pipe wall 6a of the inflow pipe 6 has a flat or elliptical cross-sectional shape, the oil is easily opened at a position close to the inner wall surface of the container 2, so that the oil can be more reliably supplied to the container. 2 can be reached. Moreover, since the pipe wall 6a of the inflow pipe 6 has a flat or elliptical cross-sectional shape, the diameter of the container 2 of the oil separator 1 can be reduced.

Further, in the oil separator 1 according to the above embodiment, the tube wall 6a has a circular cross-sectional shape.

According to this configuration, the productivity and pressure resistance of the inflow pipe 6 and the oil separator 1 can be improved.

Further, in the oil separator 1 according to the above-described embodiment, the inflow pipe 6 has a partition wall 6b, and the inflow pipe 6 includes a pipe wall separating portion 23 positioned on the upstream side of the open portion 13, and And a pipe part 11 located upstream of the pipe wall separation part 23. In the pipe part 11, the flow path in the pipe wall 6a is partitioned by a partition wall 6b. The tube wall 6a (in this example, the separation wall 24) located on the center axis side of the inner wall surface of the container 2 is separated from the partition wall 6b.

According to this configuration, since the amount of oil flowing along the separation wall 24 located on the center axis side of the shell 3 can be reduced, the amount of oil scattered on the swivel unit 9 can be reduced. Therefore, the oil separation efficiency can be improved.

The above embodiments and modifications can be implemented in combination with each other.

1 oil separator, 2 container, 3 shell, 4 upper end plate, 5 lower end plate, 6 inflow tube, 6a tube wall, 6b partition wall, 6c groove, 7 gas outflow tube, 8 oil outflow tube, 9 swivel unit, 10 swivel Open part, 11 Piping part, 12 Piping part end, 13 Opening part, 14 Downstream end, 15 Inner peripheral grooved plate, 16 Outer peripheral side grooved plate, 17 Outer peripheral pipe, 18 Grooved plate, 18a Bottom surface part, 18b Wall part , 19 partition plate, 20 circular tube, 20a semicircular part, 21 square tube, 21a U-shaped part, 22 partition wall, 23 tube wall separation part, 24 separation wall, a long axis, b, c short axis.

Claims

A container having a cylindrical inner wall surface;
An inflow pipe connected to the container along a tangential direction of the inner wall surface, for allowing a mixed fluid mixed with gas and oil to flow into the container;
A gas outflow pipe connected to an upper portion of the container and configured to flow out the gas in the container to the outside;
An oil outflow pipe connected to the lower part of the container and allowing the oil in the container to flow out to the outside;
With
The inflow pipe has a pipe wall and a partition wall or a groove provided in a flow path in the pipe wall,
On the downstream end side of the inflow pipe located inside the container, an open portion in which the pipe wall on the central axis side of the inner wall surface is opened is provided,
In the open part, the partition wall or the groove is exposed to the central axis side of the inner wall surface.
The oil separator according to claim 1, wherein the inflow pipe has a configuration in which two grooved plates are joined.
The oil separator according to claim 1, wherein the inflow pipe includes an outer peripheral pipe constituting the pipe wall, and a partition plate or a grooved plate disposed inside the outer peripheral pipe.
The oil separator according to claim 3, wherein the partition plate has a linear or curved wavy cross-sectional shape.
The oil separator according to claim 1, wherein the inflow pipe has a configuration in which a plurality of pipes arranged in parallel in one direction are joined.
2. The oil separator according to claim 1, wherein the inflow pipe has an outer peripheral pipe constituting the pipe wall and a plurality of pipes arranged in the outer peripheral pipe and arranged in parallel in one direction.
In the open portion, the partition wall or the groove is provided in the inner wall surface,
The partition wall or the groove provided in the inner wall surface and the partition wall or the groove provided in the flow path in the tube wall are continuously connected. The oil separator according to any one of the above.
The oil separator according to claim 7, wherein the partition wall or the groove provided on the inner wall surface is provided in an arc shape along the inner wall surface.
The tube wall has a flat or elliptical cross-sectional shape,
The oil separator according to any one of claims 1 to 8, wherein a major axis in a cross section of the inflow pipe is disposed in parallel to a central axis of the inner wall surface.
The oil separator according to any one of claims 1 to 8, wherein the pipe wall has a circular cross-sectional shape.
The inflow pipe has the partition wall;
The inflow pipe is provided with a pipe wall separation part located upstream of the open part, and a pipe part located upstream of the pipe wall separation part,
In the piping section, the flow path in the tube wall is partitioned by the partition wall,
The oil separator according to any one of claims 1 to 10, wherein the tube wall located on a central axis side of the inner wall surface is separated from the partition wall at the tube wall separating portion.