JPH0746342Y2 - Dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dehumidifier installed in an air circuit of a vehicle or the like.

[Conventional technology]

Generally, in vehicles such as automobiles, compressed air is used for various purposes, but this compressed air contains water vapor sucked from the atmosphere, and this water vapor is condensed into water in the air circuit. This causes corrosion of the air circuit components, malfunction, and malfunction due to freezing.

Therefore, conventionally, in such an air circuit, a dehumidifier is provided to remove moisture in the air in the circuit.

As a conventional dehumidifier of this type, a granular adsorbent (drying agent)
Is housed in a dehumidifying cylinder under the pressure of a spring, and the dehumidifying cylinder is housed in a housing and provided in the air circuit.

In such a conventional dehumidifier, the dehumidifying cylinder has a function as a container for the adsorbent, a function as a passage for the compressed air, a strength to withstand a spring force pressing the adsorbent, and a strength to withstand vibrations received from the vehicle. Must be a thing. For this reason, the dehumidifying cylinder is made of metal, synthetic resin, or the like, and is housed inside the housing. Then, the compressed air from the positive displacement air compressor is blown into the air passage formed between the housing and the dehumidifying cylinder from the inlet provided in the housing body of the dehumidifier, and from the bottom of the dehumidifying cylinder to the dehumidifying cylinder. Will be introduced to.

[Problems to be solved by the device]

However, in such a dehumidifier, the compressed air from the positive displacement air compressor pulsates, so the compressed air is injected from the inlet of the housing body of the dehumidifier into the air passage between the housing and the dehumidifying cylinder. The present inventor has revealed that there is a problem that abnormal noise is generated by resonating in the air passage.

An object of the present invention is to provide a dehumidifier capable of preventing the generation of abnormal noise.

[Means for Solving the Problems]

In the dehumidifier according to the present invention, a dehumidifying cylinder (24) containing a granular adsorbent (41) is installed in the housing (10),
An air passage (28) is formed between the dehumidifying cylinder (24) and the housing (10), and the inlet (14) of the housing (10) is opened so as to communicate with the air passage (28). In the dehumidifier having a fine and complicated air passage in the air passage (28), the air passage (2
The sound deadening member (42) for damping the pulsation of the air injected into the air passage (28) to prevent resonance in the air passage (28) is provided so as to face the inlet (14). Characterize.

Further, in the dehumidifier according to the present invention, a dehumidifying cylinder (24) containing a granular adsorbent (41) is installed in the housing (10), and the dehumidifying cylinder (24) and the housing (10) are separated from each other. An air passage (28) is formed between them, an inlet (14) is opened in the housing (10) so as to communicate with the air passage (28), and an inlet () inside the air passage (28) is formed. In a dehumidifier in which a fine air passage member (29) having a fine air passage is provided in a portion distant from the air passage (28) to the downstream side, the air passage (28) is introduced into the air passage (28). ) Is guided to the fine air passage member (29) to prevent resonance in the air passage (28) due to pulsation of air injected from the inlet (14) into the air passage (28). The guide member (43, 45) has the upstream side facing the inlet (14) and the downstream side is the fine The gas passage member (2
9) is installed to face the guide member (43, 4).
5) is characterized in that the opening area of the air outlets (44, 46) is gradually increased with increasing distance from the inlet (14).

[Action]

According to the above-mentioned first means, the pulsation of the air injected from the inlet (14) into the air passage (28) is damped by the muffling member (42), so resonance in the air passage (28) is prevented. The generation of abnormal noise due to the resonance phenomenon is prevented.

According to the above-mentioned second means, the air blown into the air passage (28) from the inlet (14) is not discharged into the air passage (28), but the guide member (43, 45) allows the fine air to flow. Since the air is guided directly to the passage member (29), the resonance phenomenon in the cavity of the air passage (28) is prevented, and the generation of abnormal noise due to the resonance phenomenon is prevented.

〔Example〕

FIG. 1 is a vertical sectional view showing an embodiment of the dehumidifier according to the present invention, showing a case where the dehumidifier according to the present invention is provided in an air brake circuit of a vehicle.

In the present embodiment, the air brake circuit is a positive displacement air compressor (hereinafter may be referred to as a compressor).
1, a main air tank 2, a brake valve 3, a brake actuator 4, a pressure governor 5, a check valve 6 and a dehumidifier 7.

The dehumidifier 7 includes a substantially cylindrical main body 11 having an open upper surface and a closed lower surface, and a lid 12 detachably attached to the upper opening of the main body 11, and the lid 12 is bolted to the main body 11. Hollow body housing 10 by fastening via the like (not shown)
Is configured. On the housing 10, a regenerating air tank 13 having a closed upper surface and having a cylindrical shape is detachably fitted to the lid body 12 so as to be continuously provided, and the tank 13 is fastened to the main body 11 together with the lid body 12. The main body 11 has an inlet 14 connected to the discharge port of the compressor 1, a control port 15 connected to the pressure governor 5, and an exhaust port 16 communicating with the atmosphere. The lid 12 is provided with a check valve 18 and an air tank 13 for regeneration.
An outlet 17 communicating with the regenerating air tank 13 and a throttle port 19 directly communicating with the regeneration air tank 13 with a slight passage. The regeneration air tank 13 is provided with an outlet 20 that communicates with the main tank 2 via the check valve 6.

A control piston 21 is slidably fitted in the lower portion of the main body 11 in the vertical direction, and the control port 15 is connected to the upper surface of the piston 21. A valve body 22 is connected to the piston 21, and the valve body 22 is connected to the inside of the main body 11 and the exhaust port 16
The valve port 23 formed between and is opened and closed.

A dehumidifying cylinder 24 having an outer diameter smaller than the inner diameter of the main body 11 is concentrically fitted inside the main body 11, and the upper end of the dehumidifying cylinder 24 is fitted to the lid 12. On the bottom surface of the dehumidifying cylinder 24, a filter 25 formed in a substantially donut shape is concentrically arranged via a pressing plate 26. A cylindrical portion 27 is formed at the center of the bottom of the dehumidifying cylinder 24 so as to hang from the bottom surface of the dehumidifying cylinder 24, and the tip end side of the cylindrical portion 27 is fitted to the inner wall of the housing 10. An air passage 28 is formed between the outer circumference of the dehumidifying cylinder 24 and the inner circumference of the housing 10, and a wire net 29 as a fine air passage member having a fine air passage is attached in the middle of the air passage 28. There is. A small hole 30 is formed in the cylindrical portion 27, and the air introduced from the inlet 14 is an air passage 28,
It is adapted to be introduced into the dehumidifying cylinder 24 through the small hole 30. A pressing plate 31 is placed on the filter 25, and a bottom plate 32 is placed on the upper surface of the pressing plate 31. A plurality of small holes 32a are formed in the bottom plate 32, and the air passing through the filter 25 is introduced into the dehumidifying cylinder 24 through the small holes 32a.

In the dehumidifying cylinder 24, a top plate 33 and partition plates 34, 35, 36, 37 are separated from each other and arranged substantially parallel to the horizontal axis, and the outer peripheral surface of each plate can be attached to and detached from the inner wall surface of the dehumidifying cylinder 24 Supported by. A large number of ventilation holes 33a are formed over the entire surface of the top plate 33, and the top plate 33 is pressed vertically downward by the spring force of the spring 40. The partition plate 35 is formed with a plurality of vent holes 35a communicating with the central region in the dehumidifying cylinder 24,
The partition plates 34, 36 are formed with a plurality of vent holes 34a, 36a which communicate with the peripheral region in the dehumidifying cylinder 24. That is, the partition plate 35 is configured as the first partition plate, and the partition plates 34 and 36 are the second partition plates.
It is configured as a partition plate. And the second partition plate 34,
36 and the first partition plate 35 are alternately arranged apart from each other. A plurality of vent holes 37a are formed over the entire surface of the partition plate 37 arranged on the bottom side of the dehumidifying cylinder 24. A granular adsorbent 41 is housed between each partition plate and the top plate 33.

In this embodiment, the air passage 28 is provided with a sound deadening member 42 made of a material that forms a fine air flow path such as a fine wire mesh, a steel wool aggregate, or a porous member.
It is laid out so as to be opposed to 14.

Next, the operation will be described.

First, as the compressed air supply process, the compressed air sent from the compressor 1 enters the inlet 14 of the dehumidifier 7. The inflowing air reaches the inside of the dehumidifying cylinder 24 from the small hole 30 at the bottom of the dehumidifying cylinder 24 through the air passage 28 formed between the main body 11 and the dehumidifying cylinder 24, and passes through the filter 25. During this passage, the air is filtered for water drops, oil, dust and the like.

The air filtered by the filter 25 reaches the region of the adsorbent 41 through the group of small holes 32a and the vent holes 37a, and reaches the regeneration air tank 13 from the outlet 17 while passing through the group of adsorbents. At this time, the air that has passed through the vent holes 37a passes through the vent holes 36a, 35a, 34a, and 33a, respectively, and is guided to the outlet 17. That is, the dehumidifying cylinder
It reaches the outlet 17 while alternately passing through the peripheral region in 24 and the central region in the dehumidifying cylinder 24. Therefore, an air passage is formed in all regions of the dehumidifying cylinder 24, and the air reaches all the adsorbents 41 in the dehumidifying cylinder 24 while reaching the outlet 17. As a result, the humidity of the air introduced into the dehumidifying cylinder 24 is adsorbed and captured by the adsorbent 41 and dehumidified.

The dry air in the regeneration tank 13 is stored in the main tank 2 from the outlet 20 through the check valve 6. The air in the main tank 2 is sent to the brake actuator 4 at any time when the brake valve 3 is operated, so that the brake operation is executed.

When the internal pressure of the main tank 2 becomes equal to or higher than the set value, the pressure governor 5 operates to unload the compressor 1 and apply the indicated pressure to the control port 15 of the dehumidifier 7. Due to this applied pressure, the piston 21 is lowered, and the valve body 22 is opened to open the valve port 23. Valve 23
When is opened, the inside of the main body 11 communicates with the atmosphere, so that the compressed air in the regeneration tank 13 gradually flows into the main body 11 through the throttle port 19.

This inflowing air flows through the vent holes 33a, 34a, 35a, 36a, 37a adsorbent 4
1, backflow through the small hole 32a, the filter 25, the small hole 30, the valve port 23, and the exhaust port 16 and discharge the air to the atmosphere. Also at this time, the inflowing air alternately flows in the peripheral region in the dehumidifying cylinder 24 and the central region in the dehumidifying cylinder 24, and an air passage is formed in all the regions in the dehumidifying cylinder 24. All adsorbents 41 in contact with the inflowing air are dried and regenerated, and pass through the filter 25 to remove traps, regenerate the filter and release pollutants to the atmosphere.

By the way, in the case of the conventional example in which the muffling member 42 is not provided in the inlet 14 of the air passage 28 formed between the housing 10 and the dehumidifying cylinder 24, the pulsating compressed air is introduced from the positive displacement air compressor 1. When injected into the air passage 28, the pulsation of the compressed air resonates in the air passage 28, which causes abnormal noise.

However, in the present embodiment, since the muffling member 42 is provided at the inlet 14 of the air passage 28, no abnormal noise is generated even if compressed air having pulsation is blown into the inlet.

That is, when the pulsating compressed air supplied from the positive displacement air compressor 1 is injected into the air passage 28 from the inlet 14, it collides with the sound deadening member 42, so that the sound deadening member 42 damps the pulsation. As a result, the resonant sound source is eliminated, and the generation of abnormal noise is prevented.

Further, by the compressed air colliding with the sound deadening member 42,
Since the oil mist and water contained in the compressed air are collected, the efficiency of discharging the oil mist and water is improved.

FIG. 2 is a longitudinal sectional view of an essential part showing another embodiment of the present invention, FIG. 3 is a partially omitted exploded perspective view thereof, and FIG. 4 is a partially omitted transverse sectional view thereof.

The second embodiment is different from the first embodiment in that a guide member 43 is connected to the entrance 14 instead of the sound deadening member 42.

That is, the guide member 43 is formed into a pipe shape by using a copper-based material, an iron-based material, or a synthetic resin, and is formed into a circular ring shape with a part cut out. It is laid at a position on the inlet 14 side of the wire net 29 in the air passage 28 formed between the housing 10 and the dehumidifying cylinder 24. One end of this guide member 43 is fluidly connected to the inlet 14, and a plurality of outlets 44 are provided in the middle of the guide member 43.
Are arranged at intervals in the circumferential direction and are opened so as to face the wire net 29. Each of the outlets 44 is configured such that the opening area thereof gradually increases as the distance from the inlet 14 increases. That is, when the opening area is adjusted by the diameter of the air outlet 44, the diameter of the air outlet 44 becomes larger as the distance from the inlet 14 increases. Further, when the opening area is adjusted by the arrangement density of the outlets 44,
The arrangement density of the outlets 44 increases as the distance from the inlet 14 increases.

In the second embodiment, when the positive displacement pulsating compressed air is blown into the inlet 14, the compressed air is guided by the guide member 43 and blown out from the group of outlets 44 and collided with the wire net 29. It Since the pulsation of the compressed air is attenuated by the wire net 29, the sound source of resonance is eliminated, and as a result, generation of abnormal noise is prevented.

FIG. 5 is a bottom view showing a modified example of the guide member, FIGS. 6 and 7 are sectional views taken along the line VI-VI of FIG. 5, and FIG.
FIG. 7 is a cross-sectional view taken along the line VII.

The guide member 45 has a blow-out port 46 formed in the shape of a series of circular arc holes in the circumferential direction, and the blow-out port 46 is formed so that the opening width W thereof gradually increases as the distance from the connection side to the inlet 14 increases. ing. The action of the guide member 45 is similar to that of the second embodiment.

The present invention is not limited to the above embodiment,
It goes without saying that various polarizations are possible without departing from the spirit of the invention.

For example, in the above-mentioned embodiment, the one used for the vehicle air brake circuit is described, but it can be applied to all dehumidifiers used for other air circuits.

[Effect of device]

As described above, according to the present invention, since the pulsation of the compressed air from the positive displacement air compressor is configured to be attenuated, the generation of abnormal noise can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of an essential part showing another embodiment of the present invention, FIG. 3 is a partially omitted exploded perspective view thereof, and FIG. 4 is a partially omitted transverse sectional view thereof. FIG. 5 is a bottom view showing a modified example of the guide member, FIGS. 6 and 7 are sectional views taken along the line VI-VI of FIG. 5, and FIG.
FIG. 7 is a cross-sectional view taken along the line VII. 1 ... Positive displacement air compressor, 7 ... Dehumidifier, 10 ...
Housing, 11 …… Main body, 13 …… Air tank for reproduction, 14
…… Inlet, 15 …… Control port, 16 …… Exhaust port,
17 …… outlet, 21 …… control piston, 22 …… valve body, 24 …… dehumidifying cylinder, 25 …… filter, 32 …… bottom plate, 33…
… Top plate, 35 …… First partition plate, 35a …… Center vent hole group, 3
4, 36 …… Second partition plate, 34a, 36a …… Ventilation hole group around the periphery, 4
1 …… Adsorbent, 42 …… Muffling member, 43, 45 …… Guide member, 4
4, 46 ... Outlet.

Claims (2)

[Scope of utility model registration request] 1. A dehumidifying cylinder (2) containing a granular adsorbent (41).
4) is installed in the housing (10), an air passage (28) is formed between the dehumidifying cylinder (24) and the housing (10), and the housing (10) has an inlet (1).
The dehumidifier in which 4) is opened so as to communicate with the air passageway (28), wherein the air passageway (28) has a fine and complicated air passageway from the inlet (14) to the air passageway (28). A sound deadening member (42) for damping the pulsation of the injected air to prevent resonance in the air passageway (28) is provided so as to face the inlet (14). Dehumidifier. 2. A dehumidifying cylinder (2) containing a granular adsorbent (41).
4) is installed in the housing (10), an air passage (28) is formed between the dehumidifying cylinder (24) and the housing (10), and the housing (10) has an inlet (1).
The fine air passage member (4) is opened so as to communicate with the air passage (28), and further has a fine air passage in a portion of the air passage (28) which is located downstream from the inlet (14). In the dehumidifier in which the air passage (28) is provided, the air passage (28) is introduced into the air passage (28) from the inlet (14).
For guiding the air injected into the fine air passage member (29) to prevent resonance in the air passage (28) due to the pulsation of the air injected into the air passage (28) from the inlet (14) The upstream side of the members (43, 45) faces the inlet (14) and the downstream side of the members (43, 45) faces the fine air passage member (29). The guide members (43, 45) have their outlets. A dehumidifier characterized in that an opening area of (44, 46) is gradually increased with increasing distance from the inlet (14).