JP2021137808A - Oil separator - Google Patents

Abstract

To provide an oil separator that facilitates attachment work thereof regardless of a vehicle type.SOLUTION: An oil separator comprises: a body 10 provided with an intake port 16 into which compressed air flows, and an exhaust port 17 from which clean air is expelled; a filter part accommodating a filter for separating compressed air into gas and liquid; and a drain bowl attached to the body 10 and covering the filter part together with the body 10, and impounding drain liquid separated from compressed air. The oil separator is provided with three intake ports 16. The intake ports 16 are provided on three of the four side walls of the body 10 so as to be openable. The exhaust port 17 is provided on the one of the four side walls of the body 10, which has no intake port 16.SELECTED DRAWING: Figure 3

Description

The present invention relates to an oil separator that separates oil contained in air that has passed through an apparatus from air.

Vehicles such as trucks, buses, and construction machinery use compressed air sent from a compressor directly connected to the engine to control systems such as brakes and suspensions. This compressed air contains moisture contained in the atmosphere and oil that lubricates the inside of the compressor. If compressed air containing water or oil enters each system, it causes rust and swelling of rubber members (O-rings, etc.), which causes malfunction. Therefore, an air dryer for removing water and oil in the compressed air is provided downstream of the compressor.

The air dryer is provided with a desiccant for removing water and a filter for capturing oil. This air dryer has a dehumidifying action of removing the moisture in the compressed air sent from the compressor and a regenerating action of discharging the moisture adsorbed by the desiccant to the outside.

Since the air discharged from the air dryer during the regeneration of the desiccant contains oil as well as water, an oil separator may be provided at the drain outlet of the air dryer in consideration of the environmental load (see, for example, Patent Document 1). .. This oil separator includes a colliding material in the housing that the air containing water and oil collides with, and causes the air to collide with the colliding material to separate the water and oil contained in the air. The separated oil is collected in the oil separator, and the clean air from which the oil has been removed is released to the outside.

Japanese Unexamined Patent Publication No. 2014-091059

By the way, in the oil separator described in Patent Document 1, when the position of the exhaust port is determined, the position of the intake port is also determined. On the other hand, the position of the air dryer to be connected to the intake port differs depending on the vehicle to be installed. For this reason, depending on the position of the connection target such as the air dryer, the connection hose connected to the intake port is routed and attached, and the installation work of the connection hose between the connection target and the oil separator and the installation work of the oil separator on the vehicle are complicated. There is.

It should be noted that these problems are generally common not only to the oil separator connected to the air dryer mounted on the vehicle but also to the oil separator attached to other mounting targets.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an oil separator in which an oil separator can be easily attached regardless of the type of vehicle.

Hereinafter, means for solving the above problems and their actions and effects will be described.
The oil separator that solves the above problems includes a body provided with an intake port into which compressed air flows in, an exhaust port in which clean air is discharged, a filter unit containing a filter for separating compressed air into gas and liquid, and the above. It is attached to the body, covers the filter portion together with the body, includes a drain reservoir portion for storing the drain liquid separated from the compressed air, is provided with at least two intake ports, and each of the intake ports is provided on the body. The gist is that the exhaust port is provided so as to be openable, and the exhaust port is provided in a portion of the body where the intake port is not provided.

According to the above configuration, at least two intake ports are provided on the body, and exhaust ports are provided on the body in a portion where the intake port is not provided. Therefore, the connection hose with the connection target can be connected to the intake port which is easy to attach according to the position of the connection target which differs depending on the type of the attachment target. Therefore, the oil separator can be easily attached regardless of the type of attachment target.

For the oil separator, at least three intake ports are provided, the intake ports are provided so as to be openable on three of the four sides of the side wall of the body, and the exhaust ports are open on three sides of the side wall of the body. It is preferable that the intake port is provided on one side that is not provided.

According to the above configuration, the intake ports are provided on three of the four sides of the side wall of the body, and the exhaust ports are provided on the other of the four sides of the side wall of the body. Therefore, the position of the intake port with respect to the exhaust port can be selected from three of the four sides on the side wall of the body, and the distance between the intake ports can be set large, so that the oil separator can be easily attached. ..

It is preferable that the oil separator is provided with a mounting member having a mounting portion that is rotatably attached to the body and a fixing portion that is fixed to the mounting target of the oil separator.

According to the above configuration, since the body is rotatable at the mounting portion of the mounting member, the position of the exhaust port can be selected by rotating the body with respect to the mounting member, and the position of the intake port can be selected from three directions. can do.

Regarding the oil separator, the body includes one of a female screw and a male screw screwed into the female screw, and the drain reservoir portion includes either one of the female screw and the male screw. It is preferable that the body and the drain reservoir are fixed by the female screw and the male screw.

According to the above configuration, the body and the drain reservoir are fixed by the female screw and the male screw. Therefore, the drain reservoir can be easily attached to and detached from the body by rotating the drain reservoir in the screw direction.

It is preferable that the oil separator is provided with a guide portion that extends from the portion where the male screw is provided and guides the male screw when it is screwed with the female screw.
According to the above configuration, since the guide portion is provided at the tip of the male screw portion, the guide portion contacts the female screw portion before the tip of the male screw portion contacts the tip of the female screw portion. Therefore, the position of the male screw with respect to the female screw can be easily adjusted, and the drain reservoir can be easily attached to the body.

For the oil separator, the length of the guide portion is preferably set to be larger than the length of the female screw.
According to the above configuration, the length of the guide portion is set to be larger than the length of the female screw. Therefore, the guide portion contacts the entire female screw portion before the tip of the male screw portion contacts the tip of the female screw portion. Therefore, the male screw starts screwing with respect to the female screw while the guide portion is in contact with the entire female screw, so that the guide function can be enhanced.

According to the present invention, the oil separator can be easily attached regardless of the type of vehicle.

The block diagram which shows the schematic structure of the compressed air drying system to which an oil separator is applied in one Embodiment of an oil separator. The perspective view which shows the structure of the oil separator of the same embodiment. 3-3 cross-sectional view showing the structure of the body of the oil separator of the same embodiment. 4-4 cross-sectional view showing the structure of the oil separator of the same embodiment. The exploded sectional view which shows the structure of the oil separator of the same embodiment. The enlarged view which shows the structure of the male screw part and the female screw part of the oil separator of the same embodiment. The enlarged view which shows the structure of the male screw part and the female screw part of the oil separator of the same embodiment. The figure which shows the modification of the guide part provided in the male screw part of an oil separator.

Hereinafter, an embodiment in which the oil separator is applied to a compressed air drying system mounted on a vehicle will be described with reference to FIGS. 1 to 7.
As shown in FIG. 1, a compressed air drying system for removing oil and water in the compressed air sent from the compressor 1 is provided downstream of the compressor 1. The compressed air drying system is provided with an air dryer 2 that removes oil and water from the compressed air. A desiccant 2a is provided in the air dryer 2. The air dryer 2 has a load operation in which compressed air is passed through the desiccant 2a to remove water and oil, and an unload operation in which the desiccant 2a is regenerated by discharging the water and oil trapped in the desiccant 2a to the outside. And do. The air dryer 2 sends dry compressed air, which is air obtained by removing oil and moisture from compressed air by road operation, to the system tank 6. The system tank 6 supplies compressed air to each system such as a brake and a suspension. When the pressure of the system tank 6 reaches a predetermined value, the exhaust valve 2b of the air dryer 2 is opened and the unload operation is performed. When the exhaust valve 2b is opened, the dry compressed air is supplied from the system tank 6 to the air dryer 2, and the dry compressed air flowing into the air dryer 2 flows in the direction opposite to the road operation. As a result, the water and oil trapped in the desiccant 2a are removed. The removed water and oil are discharged from the drain discharge port 2c of the air dryer 2 together with the air. The air discharged from the air dryer 2 is called purge air.

The compressed air drying system is provided with a first oil mist separator 7 and a second oil mist separator 8 for removing oil mist in compressed air. The two oil mist separators 7 and 8 are provided between the compressor 1 and the air dryer 2. The first oil mist separator 7 is provided upstream of the second oil mist separator 8 on the compressor 1 side. A check valve 9 for preventing backflow from the second oil mist separator 8 to the first oil mist separator 7 is provided between the first oil mist separator 7 and the second oil mist separator 8. A check valve 9 for preventing backflow from the air dryer 2 to the second oil mist separator 8 is provided between the second oil mist separator 8 and the air dryer 2.

The oil mist separator 7 has a filter 7a, and captures the oil mist contained in the compressed air sent from the compressor 1 by passing the compressed air through the filter 7a. The oil mist separator 7 is provided with a regeneration tank (not shown) for storing compressed air for regeneration, and when the pressure of the regeneration tank due to the compressed air supplied from the system tank 6 reaches a predetermined value, the oil mist separator 7 is exotic. The strike valve 7b is opened, and dry compressed air is supplied to the oil mist separator 7 from the regeneration tank. As a result, the oil mist trapped in the filter 7a is removed. The removed oil mist is discharged together with air from the drain discharge port 7c of the oil mist separator 7. The air discharged from the oil mist separator 7 is called purge air.

Further, the oil mist separator 8 has a filter 8a, and captures the oil mist contained in the compressed air sent from the compressor 1 by passing the compressed air through the filter 8a. The oil mist separator 8 is provided with a regeneration tank (not shown) for storing compressed air for regeneration, and when the pressure of the regeneration tank due to the compressed air supplied from the system tank 6 reaches a predetermined value, the oil mist separator 8 The exhaust valve 8b is opened, and dry compressed air is supplied to the oil mist separator 8 from the regeneration tank. As a result, the oil mist trapped in the filter 8a is removed. The removed oil mist is discharged together with air from the drain discharge port 8c of the oil mist separator 8. The air discharged from the oil mist separator 8 is called purge air.

Further, in the compressed air drying system, the oil separator 5 is connected to the drain discharge port 7c of the oil mist separator 7, the drain discharge port 8c of the oil mist separator 8, and the drain discharge port 2c of the air dryer 2. The oil separator 5 is connected to the first oil mist separator 7 via a connection hose 7d connected to the drain discharge port 7c of the first oil mist separator 7. Further, the oil separator 5 is connected to the second oil mist separator 8 via a connection hose 8d connected to the drain discharge port 8c of the second oil mist separator 8. Further, the oil separator 5 is connected to the air dryer 2 via a connection hose 2d connected to the drain discharge port 2c of the air dryer 2.

The oil separator 5 separates compressed air containing oil and water into gas and liquid, and discharges the separated clean air from the discharge port 5c. Further, the oil separator 5 stores a drain liquid which is a liquid containing oil and water separated from the compressed air in the housing 5a.

Next, the oil separator 5 will be described in detail with reference to FIGS. 2 to 7.
As shown in FIG. 2, the housing 5a of the oil separator 5 includes a cylindrical body 10 and a drain bowl 30 which is a drain reservoir attached to the body 10. A mounting member 70 for mounting on the vehicle to be mounted is mounted on the outer periphery of the body 10. A mounting groove 15 for mounting the mounting member 70 is provided on the outer periphery of the body 10. The mounting member 70 has a mounting portion 71 that is rotatably attached to the body 10 and a fixing portion 76 that is fixed to the vehicle. The mounting portion 71 has an annular portion 72 formed in an annular shape and a tightening portion 73 for tightening the annular portion 72 with a bolt 74 and a nut 75. The fixing portion 76 is fixed to the vehicle by a bolt (not shown). Therefore, the position of the body 10 can be changed by 360 ° in the mounting portion 71.

As shown in FIG. 3, the body 10 includes three intake ports 16 and one exhaust port 17. The intake port 16 is provided so as to be openable on three of the four sides of the side wall of the body 10. Here, the "four sides" are the directions of each range of 90 °, which is obtained by dividing 360 ° into four parts. Each intake port 16 may be provided at any position within each range. In the present embodiment, since the two oil mist separators 7 and 8 and the one air dryer 2 are connected, all three intake ports 16 are open. Then, to the connection hose 7d connected to the drain discharge port 7c of the first oil mist separator 7, the connection hose 8d connected to the drain discharge port 8c of the second oil mist separator 8, and the drain discharge port 2c of the air dryer 2. The connecting hose 2d to be connected is connected to each intake port 16. The optimum connection destination for the connection hoses 7d, 8d, and 2d is selected from the intake ports 16.

The exhaust port 17 is provided on one of the four sides of the side wall of the body 10 where the intake port 16 is not provided. The exhaust port 17 is provided with an exhaust port 5c.
As shown in FIG. 4, one end of the body 10 is closed and the other end has an opening 11. A female screw 12 is provided on the inner peripheral surface of the body 10 on the opening 11 side.

The drain bowl 30 is formed in a cylindrical shape. One end of the drain bowl 30 has a bottom. The drain bowl 30 has an opening 31 at the other end. Inside the drain bowl 30, a storage unit 32, which is a space for storing the drain liquid, is provided. A male screw 33 is provided on the outer peripheral surface of the opening 31 of the drain bowl 30. The drain bowl 30 is fixed to the body 10 by screwing the female screw 12 of the body 10 and the male screw 33 of the drain bowl 30. The oil separator 5 is fixed to the vehicle side with the body 10 arranged upward in the vertical direction and the drain bowl 30 arranged downward in the vertical direction, and stores the drain liquid in the drain bowl 30. The stored drain liquid is discarded by removing the drain bowl 30 from the body 10.

A filter portion 40 is fixed to the bottom of the body 10. The filter unit 40 includes a filter case 41, a filter 42 housed inside the filter case 41, and a filter lid 43.

An annular protrusion 13 is provided inside the body 10 and at the center of the bottom portion in the radial direction. A female screw 14 is provided on the inner peripheral surface of the annular protrusion 13. Further, the filter case 41 is formed in a cylindrical shape. A ceiling portion 53 is provided at one end of the filter case 41. An opening 54 is provided at the other end of the filter case 41. An annular protrusion 51 projecting to the outside of the filter case 41 is provided at the central portion of the ceiling portion 53 in the radial direction. A male screw 52 is provided on the outer peripheral surface of the annular protrusion 51. The filter portion 40 is fixed to the body 10 by screwing the female screw 14 of the body 10 and the male screw 52 of the filter case 41.

A plurality of first ventilation holes 56 are formed in the peripheral wall portion 55 of the filter case 41. The peripheral wall portion 55 is formed with a plurality of rows of first vent holes 56 formed along the circumferential direction. A filter outlet 57 is provided at the center of the ceiling portion 53 and surrounded by the annular protrusion 51. The filter outlet 57 has a plurality of second vents 58 that communicate the inside and the outside of the filter case 41.

The filter lid 43 is provided so as to close the opening of the filter case 41. A plurality of discharge holes 44 are formed in the filter lid 43. The filter 42 is housed in a space formed by the filter case 41 and the filter lid 43. The filter 42 has a large number of pores through which compressed air passes. The filter 42 is, for example, a sponge (urethane foam) having a large number of bubbles, a metal material such as a metal wire or a metal foil molded and having a large number of pores (crushed aluminum), glass fiber, or the like. Consists of.

The compressed air that has flowed into the filter 42 from the first ventilation hole 56 of the filter case 41 collides with the filter 42 to separate gas and liquid. The drain liquid separated by the filter 42 flows downward in the vertical direction in the filter 42 due to gravity, and falls into the storage unit 32 through the discharge hole 44. Further, the clean air separated by the filter 42 is discharged from the filter unit 40 through the second ventilation hole 58 of the filter outlet 57.

Further, the intake port 16 of the body 10 is connected to the air dryer 2 via a connection hose 2d (see FIG. 1). The intake port 16 is connected to a first passage 18 extending toward the opening 11 side of the body 10.

The first passage 18 is connected to the storage portion 32 of the drain bowl 30. The first passage 18 and the storage portion 32 of the drain bowl 30 function as a first expansion chamber 34 in which the compressed air flowing in through the intake port 16 expands. As the compressed air expands in the first expansion chamber 34, the oil and water in the compressed air tend to aggregate.

The exhaust port 17 of the body 10 discharges clean air separated by gas and liquid by the filter unit 40 to the outside. The exhaust port 17 is connected to the second passage 19. The second passage 19 is formed in a substantially L shape. The second passage 19 functions as a second expansion chamber 23. The space in the front stage of the filter case 41 is the first expansion chamber 34, and the space in the subsequent stage is the second expansion chamber 23, but the space inside the filter case 41 is also the first expansion chamber 34 and the second expansion chamber 23. Although the expansion effect is lower than that of the other, it has a function of expanding the compressed air by passing through the first ventilation hole 56.

Next, assembling the body 10, the filter unit 40, and the drain bowl 30 will be described with reference to FIGS. 5 to 7.
First, the filter portion 40 is attached to the body 10 by screwing the male screw 52 of the filter portion 40 into the female screw 14 of the body 10. Subsequently, the drain bowl 30 is attached to the body 10 by screwing the male screw 33 of the drain bowl 30 into the female screw 12 of the body 10.

When replacing the filter 42, the drain bowl 30 is removed from the body 10, and the filter portion 40 is further removed from the body 10. Then, the filter lid 43 is removed from the filter case 41, and the filter 42 is replaced. The filter unit 40 itself may be replaced.

Here, the assembly of the body 10 and the drain bowl 30 will be described in detail.
As shown in FIGS. 6 and 7, a guide portion 35 extending from the portion of the drain bowl 30 where the male screw 33 is provided is provided at the tip of the portion where the male screw 33 is provided. Therefore, before the tip of the male screw 33 portion of the drain bowl 30 contacts the tip of the female screw 12 portion of the body 10, the guide portion 35 contacts the female screw 12 portion of the body 10 to reach the body 10. On the other hand, the drain bowl 30 can be guided.

The outer peripheral corner portion 35a of the tip portion 35 of the guide portion 35 is chamfered at an angle θ. Therefore, it is possible to reduce the catch when the guide portion 35 comes into contact with the female screw 12 of the body 10.
Further, the axial length A of the guide portion 35 is set to be larger than the axial length B of the female screw 12 of the body 10. Therefore, the guide portion 35 comes into contact with the entire portion of the female screw 12 of the body 10 before the tip of the male screw 33 portion of the drain bowl 30 contacts the tip of the female screw 12 portion of the body 10. That is, while the guide portion 35 is in contact with the entire female screw 12 of the body 10, the male screw 33 of the drain bowl 30 starts screwing with respect to the female screw 12 of the body 10, so that the guide function can be enhanced. can.

Next, the attachment of the oil separator 5 to the vehicle will be described with reference to FIG. First, the mounting member 70 is mounted on the outer periphery of the body 10 of the oil separator 5 in a rotatable state. Then, by rotating the body 10 with respect to the mounting member 70, the position of the exhaust port 17 provided on the body 10 with respect to the mounting member 70 is selected. Thereby, the position of the exhaust port 17 with respect to the vehicle to which the mounting member 70 is fixed can be selected. The mounting member 70 attached to the body 10 is fixed to the vehicle by inserting a bolt through the fixing portion 76.

Subsequently, the connecting hose 7d of the first oil mist separator 7, the connecting hose 8d of the second oil mist separator 8, and the air dryer 2 are connected to the three intake ports 16 provided in the body 10 of the oil separator 5 fixed to the vehicle. Select a position where the connection hose 2d can be easily attached and connect each.

Next, the operation of the oil separator 5 will be described with reference to FIG.
When the exhaust valve 2b of the air dryer 2 is opened and the unloading operation is performed, the drain liquid containing oil and water is sent to the oil separator 5 together with the compressed air. When the exhaust valves 7b and 8b of the oil mist separators 7 and 8 are opened, the drain liquid containing the oil mist is sent to the oil separator 5 via the connecting hoses 7d, 8d and 2d together with the compressed air. The drain liquid contained in the compressed air is mist-like or liquid. Compressed air containing the drain liquid flows into the oil separator 5 from each intake port 16.

The compressed air expands by flowing into the first expansion chamber 34 from the three intake ports 16. The pressure of the compressed air expanded in the first expansion chamber 34 is maintained at a value larger than that of the atmospheric pressure. The expanded compressed air flows into the filter portion 40 through the first ventilation hole 56 of the filter case 41. The compressed air that has flowed into the filter unit 40 passes through the filter 42 while repeating collisions with the wall surface of the pores and collisions (friction) between the compressed airs in the pores. As a result, the compressed air is separated into a drain liquid and clean air from which the drain liquid has been removed. The separated liquid drain liquid falls into the storage unit 32. The separated clean air goes to the filter outlet 57. The clean air is compressed by passing through the second ventilation hole 58 of the filter outlet 57, and then expands in the second expansion chamber 23 (second passage 19). The clean air that has passed through the second passage 19 is discharged to the outside from the exhaust port 17.

As described above, the oil separator 5 can select the direction of the exhaust port 17 with respect to the vehicle, and further selects one from the three intake ports 16 that makes it easy to attach the connecting hoses 7d, 8d, and 2d. be able to. Therefore, the oil separator 5 can be easily attached regardless of the type of vehicle.

As described above, according to the present embodiment, the following effects can be obtained.
(1) Three intake ports 16 are provided on the side walls of the body 10, and exhaust ports 17 are provided on the side walls of the body where the intake ports 16 are not provided. Therefore, the connection hoses 7d, 8d, and 2d for the oil mist separators 7 and 8 and the air dryer 2 are connected to the intake port 16 which is easy to attach according to the positions of the oil mist separators 7 and 8 and the air dryer 2 which differ depending on the type of vehicle. be able to. Therefore, the oil separator 5 can be easily attached regardless of the type of vehicle.

(2) The intake port 16 is provided on three of the four sides of the side wall of the body 10, and the exhaust port 17 is provided on the other of the four sides of the side wall of the body 10. Therefore, the position of the intake port 16 with respect to the exhaust port 17 can be selected from three of the four sides on the side wall of the body 10, and the distance between the intake ports 16 can be set large, so that the oil separator 5 can be attached. The work is easy.

(3) Since the body 10 is rotatable in the mounting portion 71 of the mounting member 70, the body 10 can be rotated with respect to the mounting member 70 to select the position of the exhaust port 17, and further, the position of the intake port 16 can be selected. Can be selected from three sides.

(4) The body 10 and the drain bowl 30 are fixed by the female screw 12 and the male screw 33. Therefore, the drain bowl can be easily attached to and detached from the body 10 by rotating the drain bowl 30 with respect to the body 10 in the screw direction.

(5) Since the guide portion 35 is provided at the tip of the male screw 33 portion, the guide portion 35 contacts the female screw 12 portion before the tip of the male screw 33 portion contacts the tip of the female screw 12 portion. do. Therefore, the position of the male screw 33 with respect to the female screw 12 can be easily adjusted, and the drain bowl 30 can be easily attached to the body 10.

(6) The axial length A of the guide portion 35 is set to be larger than the axial length B of the female screw 12 of the body 10. Therefore, while the guide portion 35 is in contact with the entire female screw 12 of the body 10, the male screw 33 of the drain bowl 30 starts screwing with respect to the female screw 12 of the body 10, so that the guide function is enhanced. Can be done.

In addition, the said embodiment can also be carried out in the following embodiment which modified this as appropriate.
In the above embodiment, the tip outer peripheral corner portion 35a of the guide portion 35 is chamfered at an angle θ, but as shown in FIG. 8, the tip outer peripheral corner portion 35a of the guide portion 35 may be chamfered with a rounded radius R.

-In the above embodiment, the female screw 12 is provided on the body 10 and the male screw 33 is provided on the drain bowl 30, but the drain bowl 30 is attached to the outer periphery of the body 10 so that the male screw is attached to the body 10 and the female is attached to the drain bowl 30. A screw may be provided. In this case, a guide portion is provided at the tip of the portion of the body 10 where the male screw is provided.

In the above embodiment, the length A of the guide portion 35 of the drain bowl 30 is set to be larger than the axial length B of the female screw 12 of the body 10. However, if the guide function can be obtained by the presence of the guide portion 35, the length A of the guide portion 35 may be set to be the same as or smaller than the axial length B of the female screw 12 of the body 10. ..

-In the above embodiment, the drain bowl 30 is provided with the guide portion 35, but if the guide function is not required, the guide portion 35 may be omitted.
-In the above embodiment, the mounting member 70 is attached to the body 10 and the oil separator 5 is fixed to the vehicle, but the body 10 of the oil separator 5 may be directly fixed to the vehicle.

-The drain bowl 30 of the oil separator 5 of the above embodiment may be provided with a drain discharge port for draining the drain liquid stored in the storage unit 32.
-In the above embodiment, three intake ports 16 are provided on the side wall of the body 10, but four or more intake ports may be provided on three of the four sides. That is, when four or more intake ports are provided, a plurality of intake ports are provided on any of the four sides. In this way, four or more connecting hoses can be connected to the oil separator while selecting the optimum intake port position.

-In the above embodiment, the compressed air drying system including two oil mist separators 7 and 8 and one air dryer 2 is used, but the compressed air drying system including one oil mist separator and one air dryer 2 is provided. It may be a system. In this case, the connection hose of the oil mist separator and the connection hose of the air dryer 2 are connected by selecting the intake port 16 at the optimum position of the oil separator 5. Since two intake ports 16 are selected and used out of the three intake ports 16, the remaining one intake port 16 is closed by fitting a closing member (not shown).

-In the above embodiment, the intake port 16 is provided at a position within each range of 90 ° obtained by dividing 360 ° into four on the side wall of the body 10, but the distance between the intake ports 16 may be an arbitrary angle.

-In the above embodiment, all the intake ports 16 are provided on the side wall of the body 10, but at least one intake port 16 may be provided on the upper wall of the body 10.
Further, if it is not necessary to remove the oil mist upstream of the air dryer 2, a compressed air drying system including one air dryer 2 may be used. In this case, the connection hose of the air dryer 2 is connected by selecting the intake port 16 at the optimum position of the oil separator 5. Since one of the three intake ports 16 is selected and used, the remaining two intake ports 16 are closed by fitting a closing member (not shown).

-In the above embodiment, the filter unit 40 may have a configuration other than the filter 42 made of the above-mentioned material as long as it has a configuration capable of gas-liquid separation in the compressed air. For example, the filter case 41 may be provided with a baffle plate, or may be configured to separate gas and liquid by colliding compressed air with the baffle plate.

-In the above embodiment, the oil contained in the air sent from the compressor 1 is removed by the oil separator 5, but the oil contained in the gas sent from the device other than the compressor may be removed by the oil separator.

-In the above embodiment and other embodiments, the oil separator 5 is applied to a compressed air drying system mounted on a vehicle, but any system having a function of separating air (gas) containing oil into gas and liquid can be used. It may be applied to other systems. For example, the oil separator may be applied to a moving body other than a vehicle such as a train, a ship, or an aircraft. Further, the oil separator may be applied to a system operated by utilizing the air pressure provided other than the moving body.

1 ... Compressor, 2 ... Air dryer, 2a ... Drying agent, 2b ... Exost valve, 2c ... Drain discharge port, 2d ... Connection hose, 5 ... Oil separator, 5a ... Housing, 5c ... Discharge port, 6 ... System tank, 7 ... 1st oil mist separator, 8 ... 2nd oil mist separator, 7a, 8a ... filter, 7b, 8b ... Exost valve, 7c, 8c ... Drain outlet, 7d, 8d ... Connection hose, 9 ... Check valve 10, 10 ... body, 11 ... opening, 12 ... female screw, 13 ... annular protrusion, 14 ... female screw, 15 ... mounting groove, 16 ... intake port, 17 ... exhaust port, 18 ... first passage, 19 ... first 2 passages, 23 ... 2nd expansion chamber, 30 ... drain bowl, 31 ... opening, 32 ... storage part, 33 ... male screw, 34 ... 1st expansion chamber, 35 ... guide part, 35a ... tip outer peripheral corner, 40 ... Filter part, 41 ... Filter case, 42 ... Filter, 43 ... Filter lid, 44 ... Discharge hole, 51 ... Circular protrusion, 52 ... Bolt screw, 53 ... Ceiling part, 54 ... Opening, 55 ... Peripheral wall part, 56 ... 1st vent, 57 ... Filter outlet, 58 ... 2nd vent, 70 ... Mounting member, 71 ... Mounting part, 72 ... Ring part, 73 ... Tightening part, 74 ... Bolt, 75 ... Nut, 76 ... Fixed part.

Claims (6)

A body provided with an intake port into which compressed air flows in and an exhaust port in which clean air is discharged.
A filter unit that houses a filter that separates compressed air into gas and liquid,
It is attached to the body, covers the filter portion together with the body, and includes a drain reservoir portion for storing the drain liquid separated from the compressed air.
At least two intake ports are provided.
The intake port is provided in the body so as to be openable.
The exhaust port is an oil separator provided in a portion of the body where the intake port is not provided. At least three intake ports are provided.
The intake port is provided so as to be openable on three of the four sides of the side wall of the body.
The oil separator according to claim 1, wherein the exhaust port is provided on one of the four sides of the side wall of the body where the intake port is not provided. The oil separator according to claim 1 or 2, further comprising a mounting member having a mounting portion that is rotatably mounted on the body and a fixing portion that is fixed to the mounting target of the oil separator. The body comprises either a female screw or a male screw that is screwed onto the female screw.
The drain reservoir includes either the female screw or the male screw, whichever is the other.
The oil separator according to any one of claims 1 to 3, wherein the body and the drain reservoir are fixed by the female screw and the male screw. The oil separator according to claim 4, wherein a guide portion for guiding the male screw when extending from a portion provided with the male screw and screwing with the female screw is provided. The oil separator according to claim 5, wherein the length of the guide portion is set to be larger than the length of the female screw.

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