JP2003097744A - Directional control device for airflow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a directional control device for air flow capable of controlling deformation due to contraction after forming and preventing air leak to other than an airflow outlet part to which air supply is expected. SOLUTION: This device is constituted of a rotor 71 having an airflow inlet part R0 in the rotation shaft direction and an airflow outlet part R1 communicated with the airflow inlet part R0 in the circumferential direction, a housing 72 rotatably containing the rotor 71 and having an airflow inlet part H0 in the rotation shaft direction and plural airflow outlet parts H1-H5 in the circumferential direction and a motor rotating/driving the rotor 71 such that the airflow outlet part R1 is communicated with any one of the airflow outlet parts of the housing 71. Outer peripheral side of the rotor contacting inner peripheral side of the housing 72 is formed with thin-walled.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is used, for example, in a water treatment system having a plurality of tanks for storing and purifying wastewater containing crushed food waste from a disposer of a sink, and the like. The present invention relates to an air flow path switching device that switches a flow path of air required for processing (aeration and precipitation promotion) in a tank and transfer (air lift) between tanks.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 2000-
In the water treatment system disclosed in Japanese Patent No. 588 (C02F 3/12), the air supply means (blower, etc., hereinafter, blower) is switched to one air inflow port into which air sent from the air supply means flows. An air flow path switching means having a plurality of controllable air outlets is connected to supply air to each tank and a single blower is sufficient.

For example, FIG. 6 is a system configuration diagram showing an example of a water treatment system for purifying wastewater from a disposer and discharging it to sewer.
It is used by switching to one flow path. The pipe shown by the solid line shows the flow of liquid (solid-liquid mixed liquid), and the pipe shown by the broken line shows the flow of air.

In this water treatment system, waste water containing crushed food waste from a disposer (not shown) is temporarily stored in the flow rate adjusting tank 10, and the precipitate is introduced into the solid-liquid separation device 20 by the air lift pipe 11. Separated into solid and liquid,
The liquid content is returned to the flow rate adjusting tank 10, and the solid content is put into a composting (composting) device 30 and composted by a decomposition treatment of organic substances by microorganisms. Further, the supernatant of the flow rate adjusting tank 10 is transferred to the aeration tank 40 by the air lift pipe 12 and decomposes organic components by microorganisms by aeration processing. Then, the supernatant of the aeration tank 40 is allowed to naturally flow down to the precipitation separation tank 50 communicating at the top to precipitate sludge,
The supernatant is discharged to the sewer, and the sludge that has settled is returned to the first-stage flow rate adjusting tank 10 by the air lift pipe 51.

In this water treatment system, one blower 60
The air from the blower 60 is supplied to the flow rate adjusting tank 10, the aeration tank 40, and the precipitation separation tank 50 via an air flow path switching device 70 that switches the air flow to each flow path.

Further, the air flow path switching device 70 has an air inlet R0 in the direction of the rotation axis, and a rotor 71 having an air outlet R1 in the circumferential direction which communicates with the air inlet R0.
This rotor 71 is rotatably accommodated, has an air inlet H0 in its rotation axis direction, and has a housing 72 having six air outlets H1 to H6 in the circumferential direction, and an air outlet of the rotor 71. R1 is composed of a motor (not shown) that is rotationally driven so as to communicate with any of the air outlets H1 to H6 of the housing 72.

Air pipes 81 to 8 indicated by broken lines are provided at the air outlets H1 to H6 of the air flow path switching device 70, respectively.
6 is connected, the tip of the air pipe 81 is connected to the bottom of the aeration tank 40, the air diffuser 81a is connected, the tip of the air pipe 82 is connected to the lower portion of the air lift pipe 12 for air-lifting the supernatant of the flow rate adjusting tank 10, The tip of the air pipe 83 is connected to the lower portion of the air lift pipe 11 for air-lifting the sediment of the flow rate adjusting tank 10, the tip of the air pipe 84 is connected to the lower portion of the air lift pipe 51 for air-lifting the sediment of the precipitation separation tank 50, and the air pipe 85. Of the air pipe 86 is connected to the lower portion of the flow rate adjusting tank 10 and is connected to the air diffuser pipe 85a. The tip of the air pipe 86 is connected to the lower portion of the precipitation separation tank 50 and is connected to the air diffuser pipe 86a.

Of the air pipes 81 to 86, the air pipes 81a, 85a, 86a are connected to the air pipe 81,
A check valve 90 is attached to each of 85 and 86 in the middle thereof.

Although not shown in the drawing, a control section including a microcomputer for controlling the entire water treatment system and an operation display section for displaying the status of various operations and abnormalities are provided. The blower 60 and the air flow path switching device 70 are also controlled by the control unit.

As the air flow path switching device 70, for example, a device having a structure shown in FIG. 7 has already been proposed by the applicant of the present application (Japanese Patent Application No. 2000-384686).

In this air flow path switching device 70, the inner surface of a housing 72 is formed into a substantially mortar shape, and a rotor 71 is provided.
Is formed in a substantially frame shape corresponding to the inner surface shape of the housing 72. That is, the angle formed by the substantially mortar-shaped inner sloped surface 72b of the housing 72 and the angle formed by the substantially frame-shaped side sloped surface 71b of the rotor 71 are formed to be the same. Inner slope 72b of the housing 72
In the rotor 71, openings reaching the air outlets H1 to H5 (only H2 and H5 are shown in the figure) are formed at equal intervals.
On the side slope 71b of the air outlet R1 corresponding to the opening.
Are formed. Air inlet H0 of housing 72
Is provided in the housing lid 72c that covers the substantially mortar-shaped upper opening, and the rotor 7 is placed in the substantially mortar-shaped space of the housing 72.
After 1 is stored, it is structured to be covered with a lid 72c.

Further, respective diameters of the rotor 71 are set so that the rotary shaft 71d of the rotor 71 loosely penetrates a through hole 72d formed in the bottom of the housing 72.

Further, in order to connect the rotating shaft 71d of the rotor 71 and the motor shaft 73a with a universal joint structure in which the rotor 71 is movable in the motor shaft direction (thrust direction), the motor 73 has a cross motor shaft. 73e is provided, and the cross shaft 71d of the rotor 71 is provided with a cross groove 71e into which the cross motor shaft 73e is fitted.
Is formed deeper than the height of the cross motor shaft 73e so that no load is applied to the cross motor shaft 73e.

Further, a positioning rotary plate 75 is attached to the rotary shaft 71d of the rotor 71, and positioning holes (positioning holes are provided at the periphery of the positioning rotary plate 75 at intervals corresponding to the air outlets H1 to H5). (Not shown) is formed, and one of the positioning holes is formed so as to be distinguishable from the other for recognizing the current position. In addition, so as to be positioned above and below the peripheral edge of the positioning rotary plate 75,
A photo sensor 76 is attached, and the photo sensor 76 and the positioning rotary plate 75 are configured so that the air outlet R1 of the rotor 71 can be positioned at any of the air outlets H1 to H5 of the housing 72. ing.

The air flow path switching device 70 receives the air from the blower 60 at the air inlet H0 of the housing lid 72c, passes through the rotor 71, and then the air outlet of the housing 72 selected by the rotor 71. It is configured to be discharged to either. At this time, air pressure is applied to the rotor 71, and the rotor 71 is pushed downward, so that the side sloped surface 71 b of the rotor 71 becomes the inner sloped surface 72 of the housing 72.
It is pressed against b to prevent air leakage.

The air blown from the blower 60 is heated by the blower 60, so that the heated air is blown from the blower 60 to the air flow path switching device 70. Here, when the air taken in by the blower 60 contains a large amount of water (for example, in the case where the blower 60 takes in the air from the outside of the water treatment device, it is humid outside in rainy weather, and In the case of a configuration in which the air is taken in from the inside, water vapor generated from each tank inside the apparatus) and air from the blower 60 become hot and humid.

When this hot and humid air flows into the air flow path switching device 70 at room temperature, the temperature difference causes the gap between the rotor 71 and the housing lid 72c and the side sloped surface 71b of the rotor 71.
If dew condensation water is generated between the inner sloped surface 72b of the housing 72 and the like, and the water droplet w flows down and adheres to the photosensor 76, the motor 73, etc., which are electrical components directly below, the malfunction of the air flow path switching device 70 will occur. In addition to failure, the rotor 71 may be in close contact with the housing 72 due to the surface tension effect of water, and the air passage may not be switched.

Further, in the above structure, since the blower 60 and the air flow path switching device 70 are directly connected, the blower 60
The noise (including low-frequency vibration sound) generated by the above-mentioned noise propagates to each pipe via the air flow path switching device 70, and causes the noise of the entire water treatment device. In order to prevent this noise, if soundproof measures are taken for each pipe, the number of parts for soundproof measures increases, the installation space becomes large, the water treatment device becomes large, and the cost also increases.

Therefore, the applicant of the present application has newly proposed a device as shown in FIG. 8 which is provided with measures against dew condensation and soundproofing in order to solve the above-mentioned problems (Japanese Patent Application No. 200-200).
1-85127)

Here, first, the motor 73, the photosensor 76, etc., which are electric parts of the air flow switching device 70, are arranged above the rotor 71 and the housing 72. That is, the air flow path switching device 70 shown in FIG.
The arrangement is such that the top and bottom of the figure are reversed. Even with this configuration, when the blower 60 shown in FIG. 6 is operated and air supply starts, the rotor 71 is rotated by the air pressure of the air supply.
Levitates upwards against gravity, resulting in housing 7
The side sloped surface 71b of the rotor 71 is pressed against the inner sloped surface 72b of No. 2 to prevent air leakage.

The blower 60 and the air flow path switching device 7
Between 0, a large-capacity cylindrical heat exchange chamber 100 having both a heat exchange function and a sound deadening function is provided, and its bottom surface 101
Is integrated with the upper wall surface of the electric component chamber 78 of the air flow path switching device 70. In this heat exchange chamber 100,
Between the inlet 102 and the outlet 103 of the air from the blower 60, a heat exchange plate 104 is formed so as to be alternately communicated so that the contact area with the inflow air becomes large.

The bottom surface 101 of the heat exchange chamber 100 is an inclined surface that descends toward the discharge port 103, and the heat exchange plate 104 also has its open end side inclined toward the discharge port 103 so that condensed water can be removed. It collects and guides to the storage part 120 through the piping 110 extended downward from the discharge port 103. In addition, the water drain valve 1 is provided in the storage section 120.
30 is provided and is configured to be drained to any tank of the water treatment device. The pipe 110 branches horizontally from the middle and is connected to an air inlet H0 formed in a housing lid 72c of the air flow switching device 70.

In the above structure, the air blown from the blower 60 passes through the heat exchange chamber 100, is then sent to the air inlet H0 of the air flow path switching device 70, passes through the rotor 71, and then passes through the rotor 71. The air is discharged to one of the air outlets of the selected housing 72 (in the figure, the air outlet H5).

With such a structure, under conditions where dew condensation is likely to occur, for example, when the water treatment device is installed outdoors in winter, the heat exchange chamber 100 and the air flow path switching device 70.
When the ambient temperature in which is installed is low, the hot and humid air sent from the blower 60 is cooled while passing through the heat exchange chamber 100, and excess moisture is condensed when it becomes room temperature and humid air. Then, it is collected in the storage part 120 by the inclined bottom surface 101 of the heat exchange chamber 100.

Further, since the electric component chamber 78 of the air flow switching device 70 is adjacent to the heat exchange chamber 100 with one wall in between, the heat is directly transmitted from the heat exchange chamber 100 to be warmed. As a result, the temperature of the air from the blower 60 decreases while passing through the heat exchange chamber 100, and the air around the time of entering the air flow path switching device 70 is the air flow path switching device 70, its electrical component chamber 78, Eventually, the temperature becomes almost the same as that of the motor 73 and the photo sensor 76, and as a result, the air flow path switching device 70
No condensation occurs inside.

Further, some cause (air flow path switching device 7
Even if dew condensation water occurs in the housing 72 of the air flow path switching device 70 due to the fact that 0 is not sufficiently warmed, etc., it does not reach the electric component chamber 78 on the upper side thereof and is shown in FIG. Thus, the water droplet w is the air inlet H of the air flow path switching device 70.
It is returned to the 0 side and is also sent to the storage section 120.

The storage section 120 is provided with a manual drain valve 130 for periodically discharging the accumulated water. When the valve 130 is opened, the water is drained to any tank in the water treatment device. Therefore, it is possible to prevent the condensed water from being discharged to the outside.

The valve 130 should be set so that it does not overlap with the time for supplying air to each tank, and it should be operated automatically so that it can be opened and drained periodically when the blower 60 is stopped. Therefore, it is possible to automate so as not to affect the control of the water treatment system.

Further, the heat exchange chamber 100 is provided with a blower 60.
Since it is formed in a structure that also has a muffler effect to muffle the noise (including low-frequency vibration noise), it can be muffled before entering the air flow path switching device 70, and as a result, extends from the air flow path switching device 70. Since it is not necessary to attach a soundproofing device to each pipe, soundproofing measures can be simplified, the required installation space for parts can be reduced, and the water treatment device can be downsized.
Furthermore, a cost reduction effect can be obtained.

[0030]

There is no problem when the rotor 71 as described above is manufactured by cutting, but if it is molded with resin using a mold for mass production, etc.,
The resin heated at the time of molding contracts when the temperature returns to room temperature, and as shown in FIG. 9 (a), it does not have the original shape of the chain double-dashed line, and a so-called sink mark is generated to form the side slope 71b. Etc. will be transformed into a hollow shape. When this rotor 71 is incorporated into the housing 72, as shown in FIG. 9B, the side sloped surface 71 b of the rotor 71 and the inner sloped surface 72 of the housing 72.
Since a gap is created between the air outlet b and part b, a part of the air supplied from the air inlet H0 of the housing 72 flows to the route indicated by the dotted arrow, etc. Air leakage to other than will occur.

Therefore, the present invention has been made in order to solve such a problem, and it is possible to suppress deformation due to contraction after molding and prevent air leakage to a portion other than the air outflow portion to be fed. An object is to provide a flow path switching device.

[0032]

In order to achieve the above-mentioned object, the present invention has an air inflow portion in the rotation axis direction, and an air outflow portion communicating with this air inflow portion in the circumferential direction. A rotor having the rotor, a housing rotatably accommodating the rotor, having an air inflow portion in the rotation axis direction and having a plurality of air outflow portions in the circumferential direction, and the rotor having the air outflow portion. Is a motor that is rotationally driven so as to communicate with any of the air outflow portions of the housing, and the outer peripheral side of the rotor that is in contact with the inner peripheral side of the housing is thinly formed. .

Specifically, the rotor is formed in a substantially umbrella shape, and the inner surface shape of the housing corresponds to the outer surface shape of the rotor.

Further, the angle formed by the side slope of the rotor is set larger than the angle formed by the inner slope of the housing.

In addition, it is characterized in that the thickness of the side slope of the rotor is set to be smaller in the larger diameter portion.

The rotor is formed of a flexible material.

Further, the invention is characterized in that the inner peripheral side of the housing is formed thin.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 and FIG. 2 are configuration diagrams showing a main part of an embodiment of the present invention, and the same reference numerals as those in the above-mentioned drawings indicate the same or corresponding parts.

In the present embodiment, the rotor 71 of the air flow switching device 70 is formed into a substantially umbrella shape so that the rotor 71
The wall thickness t1 is reduced. Also for that,
The tube-shaped portion that is the air inlet R0 of the conventional rotor 71 and is provided as the rotary shaft of the conventional rotor 71 is eliminated, and as an alternative thereto, a substantially downward projection from the umbrella-shaped top surface is provided. A Y-shaped rib 71g is provided, and the diameter d of the circumscribing circle c shown by the two-dot chain line in FIG. 2C in the substantially Y-shaped rib 71g is set to be the same as the outer diameter of the conventional tubular portion. It is a thing.

That is, the above-described shrinkage due to shrinkage after molding occurs where the wall thickness is large. Therefore, the rotor 71
2A to 2C are formed into a substantially umbrella shape, the thickness t1 of the rotor 71 becomes thin, so that the rotor 71
There is no sink mark on the side slope 71b due to shrinkage after molding.

Since the conventional tube-shaped portion is left, FIG.
As shown in FIG. 7, it is conceivable that the side sloped surface 71b excluding the communication passage portion extending from the tube-shaped air inlet R0 to the air outlet R1 is formed thin, but when formed in this way, the upper side of the air outlet R1 is formed. Since the portion 71h and the like cannot be thinned, the side slope 71 on the side where the air outlet R1 is formed
Since b does not have the shape of the chain double-dashed line which should be the original shape, it is not possible to sufficiently prevent air leakage to other than the air outflow port to which air is to be supplied.

Therefore, FIGS. 2A to 2C of the present embodiment.
When assembled as shown in FIG. 1, when assembled as shown in FIG. 1, as shown in FIG. 1C, the substantially Y-shaped rib 71g can be seen through the air inlet H0 of the housing lid 72c, and other than the rib 71g. The shaded area, which is a region, functions as the air inlet R0 of the rotor 71. Further, the lower end side of the rotor 71 is rotatably positioned by a bearing portion 72g formed at an upper end of the air inlet H0 of the housing lid 7c with a tip portion of the substantially Y-shaped rib 71g.

In the air flow path switching device 70 assembled as shown in FIG. 1, the air blown from the blower 60 described above is formed in the housing lid 72c at the air inlet H0.
Since it passes through between the ribs of the substantially Y-shaped rib 71g that functions as the air inlet R0 of the rotor 71 and the side slope 71b of the rotor 71 and the inner slope 72b of the housing 72 are pressed by air pressure, There is no air leakage, and the air is discharged from any one (here, H5) of the air outlets of the housing 72 with which the air outlet R1 of the rotor 71 coincides.

In the present embodiment, the housing 72 side shown in FIG. 1 is also formed to be thin for the same reason as the sink of the rotor 71 described above. As will be described later, if the rotor 71 is made of a flexible material such as an elastomer (synthetic rubber or the like), the housing 71 side can be used as it is, but the housing 72 side can be used as in the present embodiment. Also, by molding so that the wall thickness becomes thin, air leakage can be reliably prevented regardless of the molding material of the rotor 71.

The rotating shaft 71d on the upper side of the rotor 71, which is connected to the drive shaft of the motor 73 by a universal joint structure, has a rectangular shape although the problem of air leakage does not occur even if sink marks occur. Since the fitting groove 71i deforms like a drum, a lightening portion 71j is formed around the fitting groove 71i to prevent this.

FIGS. 4 and 5 are main-part configuration diagrams showing another embodiment of the present invention, and the same reference numerals as those in the above-mentioned embodiment denote the same or corresponding portions.

In this embodiment, as shown in FIG.
As shown in (b), the side slope 71b of the rotor 71 is formed so that the angle β formed by the side slope 71b is larger than the angle α formed by the inner slope 72b of the housing 72, and the side slope 71b of the rotor 71 has a large diameter portion. The wall thickness t2 is made thinner toward the lower side to facilitate deformation, and the wall thickness t3 of the small diameter portion (root portion) is also formed to be thin so that it can be deformed by air pressure.

When these are assembled as shown in FIG. 5A, even if the molding material of the rotor 71 is hard (for example, plastomer such as plastic), when air is sent from the air inlet H0 of the housing 72, Figure 5 by air pressure
As shown in (b), the rotor 71 is deformed, and the side sloped surface 71b is pressed against the inner sloped surface 72b of the housing 72.

That is, when no air is sent,
As shown in (a), the large-diameter portion of the side slant surface 71b of the rotor 71 is in contact with the inner slant surface 72b of the housing 72, and the other portions are separated. When air is fed, first, the thinnest large-diameter portion in contact is deformed, and as the rotor 71 rises, the portion gradually deformed toward the smaller-diameter portion moves, and finally, the minimum-diameter portion. The deformation progresses to the state shown in FIG. 5B, and the side sloped surface 71b of the rotor 71 is changed to the housing 71.
Elastically and smoothly adheres to the inner slope 72b. As a result, it is possible to more surely prevent air leakage to other than the air outlet to be supplied.

Then, when the air supply is completed, the weight of the rotor 71 and the elasticity of the side sloped surface 71b cause a change from FIG. 5 (b) to FIG.
Since it is returned to the state of (a), the side slope 71 of the rotor 71 is
It is possible to prevent the motor (not shown) from being overloaded by being rotationally driven to switch the air passage while b is in close contact with the inner sloped surface 72b of the housing 71.

By the way, the action described in each of the above-described embodiments is more likely to occur if the rotor 71 is made of a flexible material such as an elastomer (synthetic rubber) so as to be easily deformed by air pressure. As a result, the airtightness is improved, and thus the air leakage prevention performance of the air flow path switching device is further improved.

[0053]

As described above, according to the present invention, a rotor having an air inflow portion in the rotation axis direction and an air outflow portion in the circumferential direction which communicates with the air inflow portion, and the rotor. A housing that is rotatably housed, has an air inflow portion in the direction of its rotation axis, and has a plurality of air outflow portions in the circumferential direction; and an air outflow portion of the rotor whose air outflow portion is one of the housings. A rotor that is driven to rotate so as to communicate with the housing, and the outer peripheral side of the rotor that is in contact with the inner peripheral side of the housing is thinly molded, so that deformation due to contraction of the rotor after molding is suppressed, and It is possible to prevent air leaks to areas other than the air outflow portion to be worried about.

Specifically, it can be realized by forming the rotor into a substantially umbrella shape and matching the inner surface shape of the housing with the outer surface shape of the rotor.

Further, by setting the angle formed by the side slope of the rotor larger than the angle formed by the inner slope of the housing, the side slope of the rotor is deformed by air pressure during air supply, and the inner slope of the housing is formed. Since they are elastically adhered to each other, it is possible to more reliably prevent air leakage to other than the air outflow port to which air is desired to be sent.

In addition, by setting the wall thickness of the side slope of the rotor so that it becomes thinner at the larger diameter portion, when air is fed, first, the thinnest large diameter portion is deformed and then gradually reduced. Since the part that deforms toward the side moves, the side slope of the rotor smoothly comes into close contact with the inner slope of the housing.

Further, by molding the rotor with a soft material, it is easily deformed by air pressure and the degree of sealing is improved, so that the air leakage prevention performance of the air flow path switching device is further improved.

Further, since the inner peripheral side of the housing is thinly formed, deformation of the housing due to shrinkage after molding can be suppressed, so that air leakage is surely prevented regardless of the molding material of the rotor. be able to.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram of an embodiment of the present invention, in which FIG.
Is a top view, (b) is a longitudinal sectional view, (c) is an arrow Y of (b).
The figure which shows the principal part seen from the direction.

FIG. 2 is a diagram showing a single rotor of the above embodiment, (a)
Is a top view, (b) is a vertical sectional view, and (c) is a bottom view.

FIG. 3 is a vertical cross-sectional view of a rotor in which a side slope is formed thin while leaving a tube-shaped portion that forms an air inlet and a rotation axis in a conventional rotor.

FIG. 4 is a main part configuration diagram showing another embodiment of the present invention,
(A) is a vertical sectional view of the housing alone, (b) is a vertical sectional view of the rotor alone

5 is a vertical cross-sectional view after assembling the housing and the rotor shown in FIG. 4, where (a) shows a state when air is not fed, and (b) shows a state when air is fed. There is.

FIG. 6 is a diagram showing an example of a water treatment system to which the air flow path switching device according to the present invention is applied, in which (a) is a system configuration diagram and (b) is a cross section showing a conventional example of the air flow path switching device. Face view.

FIG. 7 is a vertical cross-sectional view showing an example of an air flow path switching device used in the water treatment system as described above.

8A and 8B are views showing an example of an air flow path switching device that is similarly provided with measures against dew condensation, where FIG. 8A is a top view and FIG. 8B is FIG.
6A is a vertical cross-sectional view for explaining a case where dew condensation occurs for some reason.

9A and 9B are views for explaining the problems of the conventional example, in which FIG. 9A is a vertical cross-sectional view of a single rotor having shrinkage due to shrinkage after molding, and FIG. 9B is an air flow path incorporating the rotor. The longitudinal cross-sectional view of a switching device.

[Explanation of symbols]

10 Flow rate adjustment tank 20 Solid-liquid separator 30 Composting device 40 aeration tank 50 sedimentation tank 60 blower 70 Air flow path switching device 71 rotor 71b side slope 71g Rib that is almost Y-shaped 72 housing 72b inner slope 72c housing lid 72g bearing R0, H0 air inlet R1, H1 to H6 air outlet 73 motor 75 Positioning rotary plate 76 photo sensor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshihiro Tamura             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Yoshihiro Tanimoto             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Keiichi Fujimoto             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Kozo Akamatsu             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3H067 AA12 AA22 AA38 CC02 CC25                       CC38 DD03 DD12 DD32 EA05                       EA24 FF17 GG03 GG27

Claims (6)

[Claims] 1. A rotor having an air inflow portion in the rotation axis direction and an air outflow portion in the circumferential direction which communicates with the air inflow portion, and a rotor rotatably accommodating the rotor. With a plurality of air outlets in the circumferential direction, and a motor for rotating the rotor so that the air outlets of the rotor communicate with any of the air outlets of the housing. And an outer peripheral side of the rotor, which is in contact with an inner peripheral side of the housing, is thinly formed. 2. The air flow path switching device according to claim 1, wherein the rotor is formed into a substantially umbrella shape, and an inner surface shape of the housing is made to correspond to an outer surface shape of the rotor. 3. The air flow path switching device according to claim 2, wherein the angle formed by the side slope of the rotor is set to be larger than the angle formed by the inner slope of the housing. 4. The air flow path switching device according to claim 3, wherein the wall thickness of the side slope of the rotor is set to be smaller in the larger diameter portion. 5. The air flow path switching device according to claim 1, wherein the rotor is made of a flexible material. 6. The air flow path switching device according to claim 1, wherein the inner peripheral side of the housing is formed thin.