JP3283737B2 - Bathroom ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan for a bathroom provided on a ceiling of a bathroom unit.

[0002]

2. Description of the Related Art In recent years, bathroom ventilators for exhausting humid air in a bathroom have become widespread in order to prevent water droplets from adhering to walls of the bathroom due to smoke generated in the bathroom and to prevent mold from occurring. The demand for efficient ventilation is increasing.

[0003] A conventional general ventilation fan for a bathroom only exhausts the air in the bathroom, so that the corner of the bathroom dries slowly and mold is liable to occur, and air enters through the gusset of the bathroom door. There was a drawback that when driving while taking a bath, it was cold.

In order to improve this point, Japanese Utility Model Publication No. 47-2
As described in Japanese Patent Application Publication No. 1578, there is a case in which an air flow is generated so that the outside air sucked by the exhaust gas flows along the wall surface, thereby generating an air current in the entire bathroom, speeding up drying, and not feeling cool air during bathing. .

[0005] Further, there has been an apparatus in which an air flow is generated along a wall surface by forcibly performing intake as in Japanese Patent Application Laid-Open No. 7-149773. The configuration will be described below with reference to FIG.

As shown in the figure, an exhaust case 103 is protruded into the bathroom unit 101 through the ceiling surface 102 of the bathroom unit 101, and a flange 104 extending outward in the horizontal direction from the outer periphery of the lower end of the exhaust case 103. , An exhaust port 105 is formed on the lower surface of the exhaust case 103, an opening 106 is formed on a side surface of the exhaust case 103, and an exhaust duct 107 communicating with the opening 106 is provided. Is provided with an exhaust fan 108. Also, the air supply duct 109 is connected to the air supply case 110 so that the air supply fan 109 can supply air to the air supply case 110.

With the above configuration, the air supplied by the supply fan 109 passes through the supply case 110,
A flange 104 extending horizontally outward from a lower end outer periphery of the exhaust case 103 and a ceiling surface 102 of the bathroom unit 101
Flows along the ceiling surface 102 from the gap between the ceiling unit and the ceiling, and airflow is generated along the surfaces of the ceiling and the wall. As a result, ventilation and drying of the entire bathroom unit 101 are promoted, the occurrence of mold can be reduced, and The state can always be kept good.

[0008]

In such a conventional structure, the flange 104 extending horizontally outward from the lower end of the exhaust case 103 is directly attached to the outer periphery of the lower end of the exhaust case 103. Depending on the construction method,
When the exhaust case 103 is mounted above its original position, the gap size between the flange 104 and the ceiling surface 102 of the bathroom unit 101 changes, and the cross-sectional area of the air supply port decreases, thereby increasing the pressure loss. There was a problem that a regular supply air volume could not be secured.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is a first object of the present invention to provide a ventilation fan for a bathroom which can secure a constant supply air volume and a constant air velocity even when the mounting state of the main body is changed by a construction method. It is the purpose of.

A second object is to enable a louver to be easily arranged at a predetermined position on the ceiling surface of the bathroom unit.

A third object is to promote drying in the bathroom unit.

[0012]

In order to achieve the above-mentioned first object, a bathroom ventilator according to the present invention has a box-like shape with an open lower surface, and has an air supply port and an exhaust port on the side surface. ,
A main body inserted and installed in the opening of the ceiling surface of the bathroom unit, an air supply duct for forcibly supplying air to the air supply port, and an air intake through a lower opening in the main body and exhaust to an exhaust port A centrifugal force type blower arranged so as to form an air supply passage communicating with the air supply port, and a centrifugal force type blower communicates with a blower suction opening formed in a spiral casing of the centrifugal force type blower. A connection duct provided on the lower surface of the casing, and a superimposed portion that overlaps the lower periphery of the connection duct, has a bowl shape that covers the lower surface of the main body, and the connection duct is formed at a central portion where the overlap portion is formed. A louver having a louver suction port communicating with the louver, and a louver provided with a louver discharge port which is communicated with the air supply flow path and is discharged in a substantially horizontal direction on four sides, and the louver is connected to the louver through a superposed portion. Provided in the duct so that it can move up and down Configuration to.

Further, in order to achieve the second object, a second
Means formed a connection duct such that the overlapping portion side of the connection duct provided in communication with the blower suction port disposed in the main body at a position eccentric from the center position of the main body is disposed about the main body position. Configuration.

In order to achieve the third object,
Means has a configuration in which at least the connection duct of the connection duct and the overlapping portion, which is in contact with the air supply flow from the air supply flow path, has a circular cross section.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, there is provided a ceiling unit in which a mounting surface of a main body and a peripheral end surface of a louver come into contact with each other depending on a thickness of a ceiling material provided on a ceiling surface of a bathroom unit. Even if the size of the louver is changed, the peripheral end surface of the louver can be reliably brought into contact with the ceiling surface by moving the louver up and down through the overlapping portion, so that the opening from which the supply air flow is discharged is always kept constant, Constant supply air volume,
Wind speed can be secured.

Further, since the center of the main body and the louver are formed in the same position by the configuration of the second means, when the louver is to be disposed at a predetermined position on the ceiling surface, the opening into which the main body is inserted is formed. It is only necessary to form the louvers at the same center position, and it is easy to dispose the louvers at predetermined positions.

Further, according to the configuration of the third means, the supply air supplied from the air supply passage flows along the circular peripheral surface of the connection duct and is discharged into the bathroom unit from the discharge ports provided on the four circumferences of the louver. Thus, the air flow quickly flows through the entire bathroom unit, and drying in the bathroom unit is promoted.

Hereinafter, a first embodiment of the present invention will be described with reference to FIG. As shown in the figure, an air supply port 1 and an exhaust port 2 are provided on the side surface in a box shape with an open lower surface, and inserted into the opening formed by the ventilation fan mounting wooden frame 5 on the ceiling surface 4 of the bathroom unit 3 for installation. The air supply port 1 is provided with an air supply duct 8 through which a supply air flow is forcibly sent from an air supply blower (not shown) via a duct connection port 7. Is provided with an exhaust duct 10 for exhausting the exhaust flow through the duct connection port 9.

In addition, a centrifugal blower 12 is disposed in the main body 6 so that air is sucked in from an opening on the lower surface and exhausted to the exhaust port 2 and an air supply passage 11 communicating with the air inlet 1 is formed. And the spiral casing 13 of the centrifugal blower 12
The connection duct 1 is attached to the lower surface of the casing 13 through the mounting boss 15 so as to communicate with the blower suction port 14 formed in
6 is provided.

Further, a louver suction portion for communicating with the connection duct 16 is provided in a central portion where the overlap portion 17 is formed in a bowl shape covering the lower surface of the main body 6 and is overlapped on the outer periphery below the connection duct 16. A louver 20 is formed by providing a louver discharge port 19 on the peripheral wall so as to have a port 18 and communicate with the air supply flow path 11 on four sides and discharge in a substantially horizontal direction.

The louver 20 is attached to the main body 6 by a well-known attachment means (not shown) by a spring which can be opened outward.

In the above configuration, when the centrifugal blower 12 and the air supply blower are operated, the moist air in the bathroom unit 3 is passed by the centrifugal blower 12 from the louver inlet 18 through the connection duct 16 to the blower. Suction port 14
The air is sucked into the centrifugal blower 12 and exhausted from the exhaust port 2 through the exhaust duct 10.

On the other hand, the air supply flow forcedly sent into the air supply duct 8 by the air supply blower is supplied from the air supply port 1 to the air supply passage 11.
And is sent from the air supply passage 11 to the louver discharge port 19 of the louver 20, discharged along the ceiling surface 4 of the bathroom unit 3, and dried outside air is supplied into the bathroom unit 3, and simultaneous supply and exhaust ventilation is performed. Thereby, the interior of the bathroom unit 3 is dried.

As shown in the figure, when the main body 6 is directly mounted on the ventilation fan mounting frame 5, the ceiling surface 4 with which the peripheral end surface of the louver 20 abuts is the thickness of the ceiling material forming the ceiling surface 4. In such a case, the louver 20 is attached by moving the louver 20 so that the peripheral end surface of the louver 20 is in contact with the ceiling surface 4 via the overlapping portion 17.

As described above, according to the bathroom ventilating fan of the first embodiment of the present invention, the louver 20 is connected to the blower inlet 14 of the centrifugal blower 12 and is provided with the connection duct 16.
The louver 20 can be moved up and down even if a step occurs between the mounting surface of the main body 6 and the ceiling surface 4 where the peripheral end surface of the louver 20 abuts on the outer periphery of the louver 20 through the overlapping portion 17. As a result, the peripheral end surface of the louver 20 can be brought into contact with the ceiling surface 4, and the supply air flow is constantly discharged from the louver discharge port 19 having a fixed size, so that a stable supply air volume and wind speed can be obtained. The supply duct and the exhaust stream are prevented from being mixed with each other by the connection duct 16 and the overlapping portion 17, so that the ventilation can be efficiently performed.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, the casing 13 provided in the centrifugal blower 12 housed in the main body 6 has a spiral shape, so that the center position A of the blower suction port 14 is
And the louver 20 connected to the connection duct 16 provided in communication with the blower suction port 14 is eccentrically attached to the main body 6.

Therefore, the connection duct 16A is connected so that the center position C of the connection duct 16A, which is provided in communication with the blower suction port 14, on the side of the overlapping portion 17 coincides with the center position B of the main body 6.
To form

In the above configuration, when the louver 20 is connected to the connection duct 16A via the overlapping portion 17, the louver 2
The center position of 0 matches the center position of the main body 6.

As described above, according to the bathroom ventilation fan of the second embodiment of the present invention, the center position B of the main body 6 always coincides with the center position D of the louver 20, so that the ceiling surface 4 of the bathroom unit 3
When the installation position of the louver 20 provided in is determined,
If an opening for inserting the main body 6 is provided on the ceiling surface 4 with the installation position as the center, the center position B of the main body 6 and the center position D of the louver 20 match, and the louver is located at a predetermined position where the installation position is determined. In addition to being able to easily dispose the louver 20, the louver 20 cannot be mounted in an eccentric state, so that a design effect can be obtained.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the drawing, at least the connection duct 16B of the connection duct 16B and the overlapping portion 17 with which the air supply flow from the air supply flow path 11 comes into contact has a circular cross section.

With the above configuration, the supply air forcedly supplied to the air supply passage 11 flows along the circular surface of the connection duct 16B in the connection duct 16B while the louver 2
The outside air is dispersed from the louver discharge ports 19 provided on the four circumferences of 0 and is diffused in all directions, and the dried outside air is diffused into the bathroom unit 3. The wet air in the bathroom unit 3 is exhausted by the centrifugal blower 12. The interior of the bathroom unit 3 is dried.

As described above, according to the bathroom ventilation fan of the third embodiment of the present invention, the supply air flows along the circular surface of the connection duct 16B and is dispersed from the louver discharge ports 19 provided on the four circumferences of the louver 20. Since the air is discharged, the dried outside air is widely diffused into the bathroom unit 3, and the drying of the bathroom unit 3 is promoted.

[0035]

As is apparent from the above embodiment, according to the present invention, an air supply port and an exhaust port are provided on the side in a box shape having an open lower surface, and inserted into the opening on the ceiling surface of the bathroom unit. A main body to be installed, an air supply duct for forcibly sending an air supply flow to the air supply port, and an air supply flow that sucks air from an opening on a lower surface into the main body, exhausts the air to an exhaust port, and communicates with the air supply port. A centrifugal blower disposed so as to form a path, a connection duct provided on the lower surface of the casing so as to communicate with a blower suction opening formed in a spiral casing of the centrifugal blower, and the connection duct It has a polymerization part that overlaps on the lower outer periphery of it, is a bowl shape that covers the lower surface of the main body, has a louver suction port that communicates with the connection duct at the center where the polymerization part is formed, and has four circumferences Communicates with the air supply flow path and discharges almost horizontally A louver provided with a louver discharge port is provided, and the louver is provided to be freely movable up and down in the connection duct via the overlapping portion, so that even if the mounting state of the main body changes depending on the construction method, a constant supply air volume, It is possible to supply a ventilation fan for a bathroom that can secure the wind speed and shorten the drying time of the bathroom unit.

Further, the connection duct is formed such that the overlapping portion side of the connection duct provided in communication with the blower inlet disposed in the main body at a position eccentric from the center position of the main body is disposed at the center of the main body. Therefore, the louver can be easily arranged at a predetermined position on the ceiling surface, and the louver suction port can be set at the center of the louver, so that the design can be improved.

In addition, since the cross-sectional shape of at least the connection duct of the connection duct and the overlapping portion, which is in contact with the air supply flow from the air supply flow path, is formed circular, the air supply flow follows the circular shape of the connection duct and is diffused around the circumference. Thus, the drying of the bathroom unit is promoted.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an installation state of a bathroom ventilation fan according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a bathroom ventilation fan according to the second embodiment.

FIG. 3 is a bottom view of the bathroom ventilation fan according to the second embodiment with a louver removed.

FIG. 4 is a sectional view showing an installation state of a bathroom ventilation fan according to the third embodiment.

FIG. 5 is a lower cross-sectional view showing a part of a flow of an air supply flow of the bathroom ventilation fan according to the third embodiment.

FIG. 6 is a cross-sectional view showing an installation state of a conventional bathroom ventilation fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air supply port 2 Exhaust port 3 Bathroom unit 4 Ceiling surface 6 Main body 8 Air supply duct 11 Air supply flow path 12 Centrifugal-type blower 13 Casing 14 Inlet for blower 16 Connection duct 16A Connection duct 16B Connection duct 17 Overlap section 18 For louver Suction port 19 Louver discharge port 20 Louver

Claims (3)

(57) [Claims] 1. A main body which is provided in a box shape with a lower surface opened and provided with an air supply port and an air discharge port on a side surface thereof and inserted into an opening of a ceiling surface of a bathroom unit, and forcibly supplies air to the air supply port. An air supply duct, and a centrifugal force type blower arranged to form an air supply passage communicating with the air supply port while taking in air from an opening on a lower surface in the main body and exhausting the air to an exhaust port. The centrifugal-type blower has a connection duct provided on the lower surface of the casing so as to communicate with a blower suction opening formed in a spiral casing of the spiral casing, and a polymerization portion that overlaps on a lower outer periphery of the connection duct. In a bowl shape that covers the lower surface, the central portion where the overlapping portion is formed has a louver suction port that communicates with the connection duct, and communicates with the air supply flow path on four sides, and is discharged in a substantially horizontal direction. Louvers with louver discharge ports A ventilation fan for a bathroom, wherein the louver is vertically movable in the connection duct via a superposition unit. 2. A connection portion of a connection duct provided in communication with a blower suction port provided at a position eccentric from the center position of the main body in the main body so that the overlapping portion side is provided around the center position of the main body. The bathroom ventilator according to claim 1, wherein a duct is formed. 3. The bathroom ventilating fan according to claim 1, wherein at least the connecting duct of the connecting duct and the overlapping portion, which is in contact with the air supply flow from the air supply passage, has a circular cross section.