JP6498174B2 - Air dryer regenerator - Google Patents

Description

  The present invention relates to an air dryer regeneration device, and more particularly to an air dryer regeneration device used in a compressed air system provided in a vehicle such as a truck or a bus.

  2. Description of the Related Art Conventionally, an air dryer that separates removed components such as moisture and oil contained in compressed air compressed by a vehicle compressor is known. Patent Document 1 discloses an exhaust mist trapping device for an air dryer device that discharges and stores the removed components separated by the air dryer by the regeneration processing (purge processing) of the air dryer using purge air formed from compressed air. It is disclosed.

  This apparatus attaches a catch container to a discharge port of a purge air path through which purge air flows, and collects a removed component discharged from the air dryer during the regeneration process. Further, an adsorbent that adsorbs the removed component is disposed at the bottom of the catch container. This prevents compressed air removal components from dripping onto the ground, etc. during the regeneration process of the air dryer, and concentrates dirt (such as ground) in places where food-related or other clean environments are required ( It is said that the occurrence of oil dripping or oil stain can be prevented.

JP 2014-148902 A

  In Patent Document 1, it is necessary to periodically replace the adsorbent that has adsorbed the removed component, and the removed component accumulated in the catch container must be periodically discarded, and the catch container must also be cleaned periodically. In addition, it is assumed that the catch container is attached only when the vehicle enters the clean environment. In this case, the catch container is attached and detached. Further, a complicated attachment structure for attaching the catch container to the discharge port is necessary so that the catch container does not fall off when the vehicle is traveling.

  As described above, when the catch container or the adsorbent is used for collecting the removed components discharged during the regeneration process of the air dryer, the maintainability of the vehicle is remarkably deteriorated, and the mounting space for the catch container must be secured in the vehicle. Moreover, since the catch container and its attachment parts are required, the weight of the vehicle increases.

  The present invention has been made to solve at least a part of such problems. The object of the present invention is to improve the maintainability of the vehicle, not to require a vehicle mounting space, and to reduce the size of the vehicle. An object of the present invention is to provide an air dryer regenerator capable of promoting weight reduction and capable of preventing the occurrence of intensive dirt in a place where a clean environment is required.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

(1) An air dryer regeneration device according to this application example is provided in an air dryer that separates removed components contained in compressed air compressed by a vehicle compressor, and the removed components separated by purge air formed from compressed air are supplied to the vehicle. A regenerator that regenerates the air dryer by discharging the air to the outside of the vehicle, and includes a purge air path having a discharge port through which purge air is sent out of the vehicle, and a capturing unit that is provided in the discharge port and captures a removed component. The removal component captured by the capturing unit is discharged out of the vehicle by the collision of purge air to the capturing unit. As a result, there is no need to provide a catch container provided with an adsorbent that adsorbs the removal component and its attachment mechanism as in the prior art, and there is no need to perform replacement of the adsorbent, cleaning work of the catch container, or desorption work. .

Further, in the air dryer regenerator according to the application example, the removed component captured by the capturing unit is misted by the collision of the purge air and discharged out of the vehicle. This prevents compressed air removal components from dripping onto the ground, etc. during the regeneration process of the air dryer, and concentrates dirt (such as ground) in places where food-related or other clean environments are required ( Occurrence of oil dripping and oil stains can be prevented.

( 2 ) In the air dryer regenerating apparatus according to the application example, the capturing unit is provided on the flexible cylinder and the lower end or the inner wall surface of the cylinder, and is directed to the outside of the vehicle along the inner wall surface. And a projecting piece that forms a recess that opens to face the purge air flow. Thereby, it is possible to reliably discharge downward while rectifying the removed component captured by the dent and misted by the purge air. Accordingly, since the removed component that is once misted and discharged is less likely to scatter around, it is possible to reliably prevent the mist-like removed component from adhering to and dropping on the peripheral parts of the vehicle.

( 3 ) In the air dryer regenerator according to the application example, the projecting piece has an annular shape along the circumferential direction of the cylindrical body. In this case, the removed component can be reliably captured over the entire inner periphery of the capturing unit.

( 4 ) In the air dryer regenerator according to the application example, the cylinder-shaped cross section of the cylindrical body has a U-shaped cross-section in the recess forming surface of the projecting piece. By forming the U-shaped dent, it is possible to slightly reduce the ventilation resistance when the purge air collides with the dent, so that the purge air can be smoothly discharged from the capturing portion.

( 5 ) In the air dryer regenerator according to the application example, the concave surface of the projecting piece has a V-shaped cross section in the cylinder length direction of the cylinder. In this case, since the collision force of the purge air against the dent can be made slightly larger than when the U-shaped dent is formed, further refinement of the removal component can be promoted.

( 6 ) In the air dryer regenerator according to the application example, the projecting piece includes a bent portion obtained by bending the lower end portion of the cylindrical body toward the inner wall surface. As a result, the purge air that has been decelerated as much as possible at the lower end of the capture portion can be efficiently misted and discharged out of the vehicle by collision with the recess.

( 7 ) In the air dryer regenerator according to the application example, the cylindrical body has a diameter-expanded portion that gradually increases in diameter toward the lower end portion, and the bent portion includes the lower end portion of the enlarged-diameter portion. It has a bag-like dent bent on the wall surface side. By forming the enlarged diameter portion, the purge air can be flowed so as to peel from the inner wall surface immediately before the purge air collides with the recess. Therefore, it becomes possible to make the purge air collide only with the removed component accumulated in the recess without hindering the flow of the removed component passing through the inner wall surface more reliably.

  According to the air dryer regenerator of the present invention using the application example, a clean environment is required while improving the maintainability of the vehicle, requiring no vehicle mounting space, and facilitating the reduction in size and weight of the vehicle. It is possible to prevent the occurrence of intensive soiling in the place where the operation is performed.

It is a schematic block diagram of the compressed air system provided with the reproducing | regenerating apparatus of the air dryer which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the cover of FIG. It is a top view of the cover of FIG. In FIG. 2, it is a figure which shows the capture | acquisition state of the removal component at the time of the regeneration process of an air dryer. FIG. 2 is a diagram showing a mist formation state of removed components during the next regeneration process of the air dryer of FIG. It is a longitudinal cross-sectional view of the cover which concerns on the modification of this invention. It is a longitudinal cross-sectional view of the cover which concerns on another modification of this invention. It is a longitudinal cross-sectional view of the cover which concerns on another modification of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a compressed air system including an air dryer regenerator according to an embodiment of the present invention. The compressed air system 1 is provided in a vehicle such as a truck or a bus, for example.

  The compressed air system 1 is driven by an engine, takes in external air, compresses it, and generates a compressed air, such as a piston type compressor 2, and the compressed air generated by the compressor 2 is introduced, and the oil and moisture contained in the compressed air The air dryer 4 which isolate | separates and removes removal components, such as these, and the air tank 6 which stores the compressed air from which the removal components were removed by the air dryer 4 are provided.

  The compressor 2, the air dryer 4, and the air tank 6 are sequentially connected through a compressed air path 8. The compressed air stored in the air tank 6 is supplied to a drive mechanism 10 such as an air brake or an air suspension of the vehicle and used as a drive source of the drive mechanism 10.

  The air dryer 4 is attached to a floor plate at the rear of a bus or a truck, for example. The air dryer 4 includes a dryer body 12, a silencer 14, and a cover (capturing part) 16. The dryer body 12 includes an oil filter, a desiccant, and the like, and a purge chamber and a drying chamber are partitioned.

  A purge air path 18 extending from the air tank 6 is connected to the dryer body 12. The purge air path 18 is formed from the inside of the dryer body 12 to the silencer 14. In the purge air path 18, a pressure regulator 22 and a purge valve 20 disposed inside the dryer body 12 are provided in order from the air tank 6 side.

  The pressure regulator 22 opens and closes the purge valve 20 based on the pressure of the compressed air in the air tank 6. A signal air path 24 is connected to the compressor 2 via the pressure regulator 22 from the air tank 6. The pressure regulator 22 controls the operation of the compressor 2 based on the pressure of the compressed air in the air tank 6.

  The silencer 14 is connected to a purge air discharge port in the dryer main body 12, and forms a discharge port 26 of the purge air path 18 in this embodiment. The silencer 14 performs noise reduction when discharging the removed component together with the purge air to the outside of the vehicle during the regeneration process of the air dryer 4.

  Hereinafter, the purification process of the compressed air in the air dryer 4 will be described. First, when compressed air from the compressor 2 is introduced into the dryer main body 12 of the air dryer 4, it is cooled in the purge chamber, and oil and moisture are stored in the bottom of the chamber. The compressed air then passes through the oil filter, where small oil droplets and dust are removed. The compressed air is then dehumidified in contact with the desiccant to produce dry and purified compressed air. The generated compressed air is stored in the air tank 6 via the compressed air path 8.

  On the other hand, the regeneration process of the oil filter and the desiccant in the air dryer 4 is performed as follows. First, when the pressure of compressed air in the air tank 6 reaches the upper limit, the pressure of signal air from the pressure regulator 22 acts on the compressor 2 via the signal air path 24, and the compressor 2 enters an unloaded (no load) state. Idle.

  At this time, the purge air having the same pressure as the signal air acts on the purge valve 20 of the air dryer 4 via the purge air path 18 to open the purge valve 20, and the interior of the dryer body 12 is opened to the atmosphere via the silencer 14 and the cover 16. To do. Since this pressure release is abruptly performed, the oil filter is washed by backwashing, the moisture contained in the desiccant is recovered, and the oil and moisture accumulated at the bottom of the purge chamber are also passed through the silencer 14 and the cover 16. Released into the atmosphere. Thus, the regeneration process of the air dryer 4 is completed.

  As described above, the air dryer 4 according to the present embodiment includes the regenerator 28 that regenerates the air dryer 4 by discharging the removed components separated by the dryer main body 12 by the purge air formed from the compressed air to the outside of the vehicle. The regenerator 28 includes the above-described purge air path 18, purge valve 20, pressure regulator 22, silencer 14, cover 16, and the like.

  On the other hand, when compressed air is used in the drive mechanism 10 and the pressure in the air tank 6 is lowered to the lower limit, this pressure drop is transmitted to the compressor 2 through the signal air path 24 by the operation of the pressure regulator 22, and the compressor 2 is loaded again. It becomes a state. The purge valve 20 is closed by the operation of the pressure regulator 22, and the compressed air is purified again.

  Here, in the regenerator 28 of the air dryer 4 according to the present embodiment, the pressure drop is transmitted to the compressor 2 via the signal air path 24. However, the present invention is not limited to this, and the pressure drop may be transmitted to the compressor 2 by an electric signal or the like from a pressure sensor (not shown) provided in the air tank 6 separately.

  FIG. 2 is a longitudinal sectional view of the cover 16, and FIG. 3 is a top view of the cover 16. The cover 16 has a cylindrical body molded from an elastic material such as resin or rubber having flexibility, that is, a hose shape. A plurality of locking portions 30 that are concave or convex are formed on the inner wall surface 16 b of the cover 16 at the upper end portion 16 a of the cover 16. The cover 16 is attached to the silencer 14 by the locking portions 30 being locked to corresponding concave and convex locked portions 32 formed at the upper part of the side surface 14 a of the silencer 14. Note that the method of attaching the cover 16 is limited to the above form as long as the cover 16 is attached around the discharge port 26 so that the purge air discharged from the discharge port 26 collides with the inner wall surface 16b of the cover 16. It is not something.

  On the lower side of the side surface 14 a of the silencer 14, a plurality of purge air discharge ports 34 are formed in a slit shape. That is, in the present embodiment, the vicinity of the discharge ports 34 of the silencer 14 forms the discharge port 26 of the purge air path 18 described above, and the cover 16 is attached to the discharge port 26 of the purge air path 18.

  The cover 16 is slightly enlarged in the vicinity of the discharge port 34 and is separated from the discharge port 34, and thereby the purge air discharged from the discharge port 34, that is, the discharge port 26 of the purge air path 18, is opened to the atmosphere. A flow path is secured. The cover 16 is slightly reduced in diameter toward the lower end portion 16c.

  Here, the cover 16 has a function of preventing the removal component discharged from the discharge port 26 during the regeneration process of the air dryer 4 from being scattered and attached to parts around the vehicle. Further, the cover 16 of the present embodiment further captures the removed component discharged from the discharge port 26 during the regeneration process, and discharges the once-removed removed component to the outside of the vehicle by the collision of the purge air during the next regeneration process. It also has a function to do.

  Specifically, the cover 16 includes a bent portion (projection piece) 36 in which the lower end portion 16c is bent toward the inner wall surface 16b. The bent portion 36 forms a recess 38 that opens in a direction opposite to the flow of purge air from the discharge port 26 toward the lower opening 16d of the cover 16 indicated by an arrow in FIG. Further, as is apparent from the flow of purge air in FIG. 2, the recess 38 is disposed along the inner wall surface 16 b of the cover 16 at the lower opening 16 d, that is, at a position where the purge air that flows toward the outside of the vehicle is blocked. .

  In the case of this embodiment, the bent portion 36 is formed over the entire circumference of the cover 16 and has an annular shape along the circumferential direction of the cover 16. As is clear from FIG. 2, the formation surface 38 a of the recess 38 has a U-shaped cross section in the cylinder length direction of the cover 16 (that is, a cross section when viewed in FIG. 2).

  FIG. 4 is a diagram illustrating a captured state of the removed component in the cover 16 during the regeneration process of the air dryer 4. The purge air indicated by the arrow discharged from the discharge port 34 of the silencer 14, that is, the discharge port 26 of the purge air path 18, first collides with the inner wall surface 16b of the cover 16, and the removal component 40 contained in the purge air adheres to the inner wall surface 16b. .

  The removal component 40 attached to the inner wall surface 16 b flows down through the inner wall surface 16 b of the cover 16 and is temporarily stored in the recess 38. The recess 38 has a volume capable of storing the removal component 40 discharged from the discharge port 26 in at least one regeneration process. In addition, the cylinder length and shape of the cover 16 are such that the flowing purge air does not hinder the flow of the removal component 40 on the inner wall surface 16b and the storage of the removal component 40 in the recess 38.

  FIG. 5 is a diagram showing a discharge state of the removal component 40 in the cover 16 during the next regeneration process of the air dryer 4 to the outside of the vehicle. In the next regeneration process of FIG. 4, purge air flows along the inner wall surface 16 b of the cover 16 as indicated by an arrow in FIG. 5, and the purge air collides toward the recess 38. Due to the impact force at the time of the collision of the purge air, the removal component 40 stored in the recess 38 in the regeneration process of FIG. 4 is discharged out of the vehicle.

  When the removal component 40 is discharged out of the vehicle, at least part of the removal component 40 is adjusted by adjusting the purge air pressure, the shape of the cover 16, the shape of the discharge port 26, etc. May be made into a fine mist and discharged out of the vehicle. As a result, it is possible to more reliably prevent the occurrence of intensive dirt in a place where a clean environment is required.

  In addition, the cylinder length and shape of the cover 16 consider that purge air collides suitably with the dent 38 in which the removal component 40 was stored. Further, since the U-shaped recess 38 is formed, the ventilation resistance when the purge air collides with the recess 38 can be slightly reduced, so that the purge air can be smoothly discharged from the cover 16. .

  As described above, the regenerator 28 of the air dryer 4 according to the present embodiment includes the cover 16 described above, so that the purge component collided with the dent 38 during the next regeneration process of the removed component captured by the dent 38 formed in the cover 16. Can be made mist and discharged out of the vehicle. That is, the cover 16 has not only the original function of the cover 16 for preventing the scattering of the removed components during the regeneration process of the air dryer 4, but also the function of capturing the removed components during the regeneration process, and further, It also has a function of discharging outside the vehicle during the regeneration process.

  As a result, there is no need to provide a catch container provided with an adsorbent that adsorbs the removal component and its attachment mechanism as in the prior art, and there is no need to perform replacement of the adsorbent, cleaning work of the catch container, or desorption work. . Therefore, the maintenance of the vehicle is improved, the vehicle mounting space is not required, the vehicle can be reduced in size and weight, and the occurrence of intensive contamination in a place where a clean environment is required is prevented. Can do.

  Although the description of the embodiment of the regenerator 28 of the air dryer 4 according to the present invention is finished above, the embodiment is not limited to the above embodiment.

  For example, the flow of the removal component 40 on the inner wall surface 16b and the storage of the removal component 40 in the recess 38 are not disturbed, and the purge air preferably collides with the recess 38 in which the removal component is stored, the shape of the cover 16; Various positions, shapes, and formation ranges of the recesses 38 in the cover 16 can be assumed.

  Specifically, as shown in FIG. 6, by forming the bent portion 36, a recess having a forming surface 42 a in which the cross section in the cylinder length direction of the cover 16 (that is, the cross section when viewed in FIG. 6) is V-shaped. 42 may be formed. In this case, since the collision force of the purge air against the recess 42 can be slightly increased as compared with the case where the U-shaped recess 38 is formed as shown in FIG. 5, further refinement of the removal component can be promoted.

  Further, when the pressure of the purge air introduced into the regenerator 28 is large, or when the amount of the removed component generated in one regeneration process is large, as shown in FIG. Then, the cylinder length of the cover 16 may be increased, and the volume of the recess 38 may be increased.

  Further, as shown in FIG. 7, the cover 16 may be formed with an enlarged diameter portion 44 that gradually increases in diameter toward the lower end portion 16 c. Further, the bent portion 36 may be curved to form a bag-like recess 46 in which the lower end portion 44a of the enlarged diameter portion 44 is bent toward the inner wall surface 16b. In this case, the volume of the recess 42 can be further increased.

  In addition, the formation of the enlarged diameter portion 44 allows the purge air to flow so as to peel from the inner wall surface 16 b immediately before the purge air collides with the recess 42. Therefore, it becomes possible to make the purge air collide only with the removed component accumulated in the recess 42 without hindering the flow of the removed component passing through the inner wall surface 16b.

  In the present embodiment, the bent portion 36 is formed at the lower end portion 16 c of the cover 16. As a result, the purge air that has been decelerated as much as possible at the lower end 16c of the cover 16 can be efficiently misted by the collision with the recess 38 and discharged out of the vehicle.

  However, as shown in FIG. 8, instead of forming the bent portion 36 at the lower end portion 16c of the cover 16, a protruding piece 48 may be formed over the entire circumference of the inner wall surface 16b. The projecting piece 48 blocks the purge air flowing along the inner wall surface 16b and forms a recess 50 that opens to face the purge air flow. In this case, the rectifying part 52 can be formed on the lower end part 16 c side with respect to the recess 50 of the cover 16. As a result, the removed component captured by the recess 50 and misted by the purge air can be reliably discharged downward while rectifying. Accordingly, since the removed component that is once misted and discharged is less likely to scatter around, it is possible to reliably prevent the mist-like removed component from adhering to and dropping on the peripheral parts of the vehicle.

  Further, the bent portion 36 that forms each of the recesses 38, 42, and 46 described above and the projecting piece 48 that forms the recess 50 form an annular shape along the circumferential direction of the cover 16. In this case, the removed component can be reliably captured over the entire inner periphery of the cover 16. However, the present invention is not limited to this, and it may be provided partially in the circumferential direction of the cover 16 or may be provided at a plurality of different positions in the tube length direction of the cover 16.

  In the case of the air dryer 4 that does not have the silencer 14, the purge air discharge port in the dryer body 12 becomes the discharge port 26 of the purge air path 18. Therefore, in this case, the cover 16 may be attached to the outlet of the dryer body 12.

  Further, in the regenerator 28 of the air dryer 4 according to the present embodiment, the description has been made using the form in which the air tank 6 and the pressure regulator 22 are separated from the air dryer 4. However, the regenerator 28 of the air dryer 4 according to the present invention is not limited to such a form, and the air tank 6 and / or the pressure regulator 22 may be integrated with the air dryer main body.

2 Compressor 4 Air dryer 16 Cover (capturing part)
16c Lower end portion 16b Inner wall surface 18 Purge air path 26 Discharge port 28 Reproduction device 36 Bending portion (projection piece)
38, 42, 46, 50 Recess 38a Forming surface 42a Forming surface 44 Expanded portion 48 Projection piece

Claims (7)

Provided in an air dryer that separates removed components contained in compressed air compressed by a vehicle compressor, and the air dryer is regenerated by discharging the separated removed components out of the vehicle by purge air formed from the compressed air. A playback device that
A purge air path having a discharge port through which the purge air is sent out of the vehicle;
A capture unit provided at the discharge port and capturing the removed component;
The removal component captured by the capture unit is discharged out of the vehicle by the collision of the purge air to the capture unit, and the removal component captured by the capture unit is misted by the collision of the purge air and is removed from the vehicle. An air dryer regenerator that is discharged . The capturing part is
A flexible cylinder;
A projecting piece provided on a lower end portion or an inner wall surface of the cylindrical body, which blocks the purge air flowing toward the outside of the vehicle along the inner wall surface, and forms a dent that opens against the purge air flow. The regenerator for an air dryer according to claim 1, comprising: The air dryer regeneration device according to claim 2 , wherein the protruding piece forms an annular shape along a circumferential direction of the cylindrical body. 4. The air dryer regenerating apparatus according to claim 3 , wherein a cylindrical surface section of the cylindrical body has a U-shape on a surface where the concave portion of the projecting piece is formed. 5. 4. The air dryer regeneration device according to claim 3 , wherein a surface of the projecting portion of the projecting piece having a concave shape is V-shaped. The protrusion is the lower end of the cylindrical body made of bent portion by bending the inner wall surface side, the reproducing apparatus of the air dryer according to claim 4 or 5. The cylindrical body has a diameter-expanded portion that gradually expands toward the lower end,
The said bending part is a reproducing | regenerating apparatus of the air dryer of Claim 6 which has the said bag-shaped dent which bent the lower end part of the said enlarged diameter part to the said inner wall surface side.

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