JP7115026B2 - blower - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air blower installed in a bathroom or the like for blowing out air or warm air corresponding to room temperature into the room.

Conventionally, air blowers have been proposed that are installed on the ceiling of a bathroom or the like, blow out warm air or air corresponding to the room temperature into the room, and achieve functions such as heating the room and drying objects to be dried in the room. . Many of such blowers have the function of ventilating indoor air to the outside, and are called bathroom ventilating/drying/heating machines.

A bathroom ventilation/drying/heating machine is provided with a centrifugal fan having a multi-blade impeller, and the impeller is rotationally driven to generate a desired air flow. In such a bathroom ventilating, drying and heating machine, a technology has been proposed that includes a flow dividing member called a flow dividing damper that divides the flow into an air path for blowing the air sucked from the bathroom into the bathroom and an air path for exhausting the air to the outside.

In a bathroom ventilation/drying/heating machine provided with such a flow dividing member, a technology has been proposed in which a flow rectifying member for rectifying the flow of air is provided in the flow dividing member (see, for example, Patent Document 1). Also, a technique has been proposed in which a fan case is provided with a member for rectifying the flow of air (see, for example, Patent Document 2).

Furthermore, in order to improve blade efficiency, a technique has been proposed in which an impeller is provided with ailerons (see, for example, Patent Document 3).

Japanese Patent No. 5263350 Japanese Patent No. 5538622 Japanese Unexamined Patent Application Publication No. 2006-17037

Conventionally, when a bathroom ventilating/drying/heating machine is driven while a person is in the bathroom, such as during bathing, there is a problem that the operating noise is loud. In a bathroom ventilation/drying/heating machine that uses a centrifugal fan, the air passage that is narrowed by the tongue is widened toward the air outlet. is the source of Even with a configuration in which a rectifying member for rectifying the flow of air is provided in the flow dividing member, it was not possible to sufficiently suppress the occurrence of turbulence caused by the air flowing into the air path widened from the tongue.

In addition, increasing the rotation speed of the impeller in order to compensate for the decrease in the air volume due to the generation of turbulence has also been a source of noise.

Furthermore, although the air drawn from the bathroom passes through the filter, there is a possibility that dust and the like that cannot be captured by the filter will adhere to the impeller. If dust or the like adheres to the impeller, ventilation resistance increases, and there is a possibility that the air volume will decrease. In order to suppress the decrease in the air volume, it is necessary to increase the rotation speed of the impeller, which becomes a source of noise.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air blower capable of suppressing the generation of sound.

In order to solve the above-mentioned problems, the present invention provides a blower fan that draws in air and blows it out, a circulation outlet through which the air blown out by the blower fan passes, and a ventilation blower through which the air blown out by the blower fan passes. and an outlet, and a flow dividing member that is displaced by a rotational movement around an axis that intersects the flow of the air blown by the blower fan and divides the air blown by the blower fan into the circulation outlet and the ventilation outlet. The blower fan includes an impeller that is rotationally driven and a case that rectifies the flow of air generated by the impeller, and the case rectifies the flow of air along the circumferential direction of the impeller a first air passage forming portion for rectifying the flow of air along the tangential direction of the impeller; and a first air passage forming portion and a second air passage forming portion. A tongue portion formed therebetween and an air passage width expanding portion for widening an air passage through which air passes from the tongue portion to match the circulation outlet, and the flow dividing member includes an outlet opening/closing portion for opening and closing the circulation outlet. In addition, an inflow regulating portion that regulates the flow of air that spreads in the direction along the axis on the upstream side with respect to the flow of air blown out by the blower fan, and the outlet opening/closing portion is on one side facing the circulation outlet. has a concave shape, the inflow restricting portion is configured in a planar shape protruding from one surface of the outlet opening/closing portion toward the tip of the outlet opening/closing portion from the shaft side , and the flow dividing member is the inflow restricting portion A flow dividing guide surface is formed on one surface of the outlet opening and closing portion, which is a non-formed portion, and the flow dividing member has a width in the direction along the axis of the flow dividing guide surface, which is upstream of the air flow blown out by the blower fan. The air blower is adjusted to the length between the tongue portion and the second air passage forming portion on the side, and is adjusted to the width of the circulation outlet on the downstream side with respect to the flow of air blown out by the blower fan. .

In the present invention, the air diverted to the circulation outlet by the flow dividing member is suppressed from spreading in the direction along the axis of the flow dividing member.

In the present invention, the occurrence of turbulence in the air flow split by the flow splitting member is suppressed, and the generation of noise is suppressed. Moreover, a predetermined air volume can be secured without increasing the rotation speed of the impeller, and an increase in noise accompanying an increase in the rotation speed of the impeller can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows an example of the bathroom ventilating-drying-heating machine of this Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows an example of the bathroom ventilating-drying-heating machine of this Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows an example of the bathroom ventilating-drying-heating machine of this Embodiment. 1 is a configuration diagram showing an installation example of a bathroom ventilating, drying and heating machine according to the present embodiment; FIG. 1 is a configuration diagram showing an installation example of a bathroom ventilating, drying and heating machine according to the present embodiment; FIG. 1 is a perspective view showing an example of a branch damper according to an embodiment; FIG. FIG. 2 is a plan view showing an example of a branch damper according to the present embodiment; FIG. 2 is a cross-sectional view showing an example of a branch damper according to the present embodiment; FIG. 2 is a cross-sectional view showing an example of a branch damper according to the present embodiment; FIG. 2 is a cross-sectional view showing an example of a branch damper according to the present embodiment; FIG. 2 is a cross-sectional view showing an example of a branch damper according to the present embodiment; It is a top view which shows an example of the impeller of this Embodiment. It is a sectional side view showing an example of an impeller of this embodiment. FIG. 4 is a plan view showing a detailed example of the shape of the blades of the embodiment; BRIEF DESCRIPTION OF THE DRAWINGS It is an exploded perspective view which shows an example of the bathroom ventilating-drying-heating machine of this Embodiment. FIG. 4 is an explanatory diagram showing the operation of the branch damper in the bathroom ventilation, drying and heating machine of the present embodiment; FIG. 4 is an explanatory diagram showing the operation of the branch damper in the bathroom ventilation, drying and heating machine of the present embodiment; FIG. 4 is an explanatory diagram showing the operation of the branch damper in the bathroom ventilation, drying and heating machine of the present embodiment; FIG. 2 is an explanatory diagram showing the flow of air in the bathroom in the bathroom ventilation/drying/heating machine of the present embodiment; FIG. 2 is an explanatory diagram showing the flow of air in the bathroom in the bathroom ventilation/drying/heating machine of the present embodiment; FIG. 4 is an explanatory diagram showing the flow of air;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a bathroom ventilating/drying/heating machine as an air blower of the present invention will be described with reference to the drawings.

<Configuration Example of Bathroom Ventilation, Drying, and Heating Machine of this Embodiment>
1 to 3 are configuration diagrams showing an example of a bathroom ventilation/drying/heating machine according to the present embodiment, FIG. 1 is a side view showing the internal configuration of the bathroom ventilation/drying/heating machine, and FIG. 2 is a plan view showing the internal configuration of the machine; FIG. Also, FIG. 3 is a plan view of a state in which the front panel is attached. Further, FIGS. 4A and 4B are configuration diagrams showing installation examples of the bathroom ventilation, drying, and heating machine according to the present embodiment.

Explaining the outline of the bathroom ventilation drying heater 1A of the present embodiment, the bathroom ventilation drying heating machine 1A includes a circulation ventilation fan 2A that sucks and blows out air, a main body 3A provided with the circulation ventilation fan 2A, and a main body It has a front panel 4A attached to 3A and a heater 5A for heating the air blown out by the circulation ventilation fan 2A. The bathroom ventilating/drying/heating machine 1A is mounted on the ceiling of the bathroom 100 where the main body 3A is installed, with the front panel 4A exposed. The bathroom ventilating/drying/heating machine 1A has the lower side on which the front panel 4A is attached.

The details of the bathroom ventilation, drying and heating machine 1A will be described below. The circulation ventilation fan 2A is an example of a blower fan composed of a centrifugal fan, and includes a multi-bladed impeller 25A and a circulation ventilation fan motor that drives the impeller 25A. 26A and a circulation ventilation fan case 27A that forms an air passage. The impeller 25A is driven by the circulation ventilation fan motor 26A to rotate, thereby generating a flow of air that is blown out in the centrifugal direction from the inside of the impeller 25A to the outer peripheral side.

The circulation ventilation fan 2A is provided with a circulation ventilation suction port 20A through which air is drawn in on the lower surface of a circulation ventilation fan case 27A. The circulation ventilation inlet 20A is configured by providing a circular opening called a bell mouth below along the rotation axis of the impeller 25A. The circulating ventilation fan case 27A is an example of a case portion, and is composed of a first air passage forming portion 27A11 formed of a substantially circular portion along the outer periphery of the impeller 25A and a portion along the tangential direction of the impeller 25A. A second air passage forming portion 27A12 is provided. A tongue portion 27A1 is formed between the first air passage forming portion 27A11 and the second air passage forming portion 27A12.

The first air passage forming portion 27A11 rectifies the flow of air along the circumferential direction of the impeller 25A. The second air passage forming portion 27A12 rectifies the flow of air along the tangential direction of the impeller 25A. As a result, the circulation ventilation fan case 27A rectifies the air blown out in the centrifugal direction of the impeller 25A to generate a flow of air blown out along the tangential direction of the impeller 25A.

The circulation ventilation fan 2A is configured such that the rotation axis of the impeller 25A is arranged in the vertical direction while the bathroom ventilation/drying/heating machine 1A is installed on the ceiling of the bathroom 100. FIG.

As a result, the circulation ventilation fan 2A has a blowing air path 28A that blows out the air sucked from the circulation ventilation suction port 20A below along the rotating shaft of the impeller 25A in the tangential direction of the impeller 25A, and the circulation ventilation fan case 27A. Formed by

The circulation ventilation fan 2A blows out air heated by driving the heater 5A or air corresponding to the temperature in the bathroom 100 by not driving the heater 5A to the lower surface of the circulation ventilation fan case 27A. A first outlet 21A is provided.

Further, the circulation ventilation fan 2A is provided with a second outlet 22A from which the air that agitates the inside of the bathroom 100 is blown out from the lower surface of the circulation ventilation fan case 27A. Further, the circulation ventilation fan 2A is provided with a ventilation outlet 23A for blowing air out of the room on the side surface of the circulation ventilation fan case 27A.

The first air outlet 21A is an example of a circulation air outlet. The ventilation fan case 27A has a substantially rectangular opening whose long side intersects the air blowing direction.

The second air outlet 22A is an example of a circulation outlet. It is composed of a substantially rectangular opening with a long side of . The second air outlet 22A is provided on the lower surface of the air outlet 28A on the side opposite to the circulation ventilation inlet 20A with respect to the first air outlet 21A.

In the main body 3A, the direction that intersects the air blowing direction of the circulation ventilation fan case 27A and is along the long sides of the first air outlet 21A and the second air outlet 22A is referred to as the width direction. Also, in the blowing air passage 28A, the direction crossing the air blowing direction of the circulation ventilation fan case 27A and along the long sides of the first blowing port 21A and the second blowing port 22A is referred to as the width direction. .

The first air outlet 21A and the second air outlet 22A have longer sides longer than the length between the second air passage forming portion 27A12 and the tongue portion 27A1. It can be adjusted to the length in the width direction.

The blow-out air passage 28A is widened toward the portion where the first blow-out port 21A and the second blow-out port 22A are provided with respect to the portion where the tongue portion 27A1 is provided. 280A is formed in which the width of the air passage is adjusted to the length in the long side direction of .

Further, the width of the air outlet 28A is narrowed at a portion where the ventilation outlet 23A is provided, and a ventilation air duct forming frame portion 281A communicating with the ventilation outlet 23A is formed. Furthermore, the blowing air passage 28A has an expanded air passage height in which the height of the air passage is widened toward the portion where the first air outlet 21A and the second air outlet 22A are provided with respect to the portion where the tongue portion 27A1 is provided. A portion 282A is formed.

The first air outlet 21A and the second air outlet 22A are composed of an air passage forming frame 50A attached to the lower surface of the circulation ventilation fan case 27A. The first air outlet 21A and the second air outlet 22A are partitioned by a partition member 51A provided in the air passage forming frame 50A, and serve as a circulating air outlet air passage through which the air blown out from the first air outlet 21A passes. , an agitated air blowing air passage through which the air blown from the second blowing port 22A passes is formed.

The body portion 3A includes a body chassis 30A that constitutes the circulation ventilation fan case 27A, and a metal case 31A that covers the body chassis 30A. The body chassis 30A is made of a resin material, and is integrally composed of a circulation ventilation fan case 27A covered with a metal case 31A and a flange portion 32A projecting outward from the peripheral edge of the lower end of the body portion 3A. Further, the ventilation air passage forming frame portion 281A is integrally formed with the main body chassis 30A so as to protrude from the ventilation outlet 23A into the air outlet 28A.

A lower cover 33A is attached to the lower surface of the main body chassis 30A. The circulation ventilation fan 2A is provided with a circulation ventilation suction port 20A and an air passage high expansion portion 282A in the lower cover 33A.

The metal case 31A has an opening facing the ventilation outlet 23A of the circulation ventilation fan 2A, and an exhaust duct joint 34A communicating with the ventilation outlet 23A is attached to the side surface.

A front panel 4A is attached to the lower surface of the main body 3A of the bathroom ventilating/drying/heating machine 1A. The front panel 4A has an opening at the bottom facing the circulation ventilation intake 20A of the circulation ventilation fan 2A to form an intake grille 40A.

The front panel 4A has a first outlet grille 41A formed by opening the lower surface facing the first outlet 21A of the circulation ventilation fan 2A, and the lower surface facing the second outlet 22A. It opens to form a second outlet grill 42A.

The first outlet grille 41A is formed of a rectangular opening that is elongated in the lateral direction, which is the direction along one side of the main body 3A. The second outlet grille 42A is, like the first outlet grille 41A, a rectangular opening that is elongated in the lateral direction along one side of the main body 3A. Configured.

The first outlet grille 41A is provided with a current plate so that the air is blown out along the longitudinal direction. The second outlet grille 42A blows air toward the outside of the main body portion 3A, which is the side opposite to the first outlet grille 41A, along the lateral direction parallel to the first outlet grille 41A. A rectifying plate is provided so as to

The heater 5A is an example of a heating member, and in this example, is composed of a PTC heater, is attached to the air passage forming frame 50A, and is provided at the first outlet 21A. When the heater 5A is driven and energized, the heater 5A is heated to heat the air passing through the first air outlet 21A, and hot air is blown out from the first air outlet 21A. The first air outlet 21A and the second air outlet 22A are partitioned by a partition member 51A, and the air blown from the second air outlet 22A does not pass through the heater 5A.

The bathroom ventilating, drying and heating machine 1A is provided with a flow dividing damper 6A that divides the flow of air between the first air outlet 21A, the second air outlet 22A, and the ventilation outlet 23A. The flow dividing damper 6A is an example of a flow dividing member, and a driving force of a damper motor (not shown) is transmitted to rotate around a shaft 60A to connect the first outlet 21A, the second outlet 22A, and the ventilation outlet 23A. Open/close operation is performed.

The flow dividing damper 6A is provided with a rotating shaft 60A above a partition member 51A that partitions the first outlet 21A and the second outlet 22A at a predetermined distance. In the circulating ventilation fan 2A, a gap formed between the shaft 60A and the partition member 51A constitutes a second outlet inflow portion 24A that communicates the outlet air path 28A and the second outlet 22A. The axis 60A intersects in a direction substantially perpendicular to the airflow.

The flow dividing damper 6A includes a first outlet opening/closing section 61A that opens and closes the first outlet 21A, and a second outlet opening/closing section 62A that opens and closes the second outlet 22A and the second outlet inlet section 24A. Prepare. Further, the flow dividing damper 6A is provided with a backflow prevention portion 63A that is in contact with the wall surface of the second blowout port 22A to maintain airtightness on the tip end side of the second blowout port opening/closing portion 62A.

The flow dividing damper 6A has a first outlet opening/closing portion 61A that extends upstream from the shaft 60A in the direction of air flow. The first outlet opening/closing part 61A is an example of an outlet opening/closing part. In addition, the flow dividing damper 6A has a second outlet opening/closing portion 62A that extends downstream from the shaft 60A in the direction of air flow.

In the flow dividing damper 6A, the lower surface 64A, which is one surface of the first outlet opening/closing portion 61A that divides the air flow toward the first outlet 21A, is formed as a concave surface along the air flow direction. In addition, in the flow dividing damper 6A, the upper surface 65A, which is the other surface of the first outlet opening/closing portion 61A that divides the air flow toward the ventilation outlet 23A, is configured with a convex surface matching the shape of the lower surface 64A.

The flow dividing damper 6A rotates around the shaft 60A, and the first outlet opening/closing portion 61A is displaced in the direction to open and close the first outlet 21A. Further, the flow dividing damper 6A rotates about the shaft 60A, and the second outlet opening/closing part 62A is displaced in the direction to open and close the second outlet 22A and the second outlet inlet part 24A.

When the flow dividing damper 6A is displaced in the direction of opening the first outlet 21A and closing the ventilation outlet 23A, it rotates about the shaft 60A, and the tip 610A of the first outlet opening/closing part 61A is raised. move in the direction

By moving the tip 610A of the first outlet opening/closing portion 61A to a predetermined position in the upward direction, the flow dividing damper 6A moves the tip 610A of the first outlet opening/closing portion 61A and one surface of the main chassis 30A. A predetermined airtightness is maintained with the upper inner surface 270A of a certain circulation ventilation fan case 27A. The position of the flow dividing damper 6A where a predetermined airtightness is maintained between the tip 610A of the first outlet opening/closing portion 61A and the upper inner surface 270A of the circulation ventilation fan case 27A is referred to as the circulation position.

In this example, as shown by the solid line in FIG. 1, the tip 610A of the first outlet opening/closing portion 61A and the upper inner surface 270A of the circulation ventilation fan case 27A are brought into contact with each other, thereby opening and closing the first outlet. A predetermined airtightness is maintained between the tip 610A of the portion 61A and the upper inner surface 270A of the circulation ventilation fan case 27A.

Further, when the flow dividing damper 6A closes the first outlet 21A and displaces in the direction of opening the ventilation outlet 23A, it rotates around the shaft 60A and rotates the tip 610A of the first outlet opening/closing part 61A. moves downward.

By moving the tip 610A of the first outlet opening/closing portion 61A downward to a predetermined position, the flow dividing damper 6A moves the tip 610A of the first outlet opening/closing portion 61A and the other surface of the main body chassis 30A. A predetermined airtightness is maintained with the inner surface 330A of the lower cover 33A. A position of the flow dividing damper 6A in which a predetermined airtightness is maintained between the tip 610A of the first outlet opening/closing portion 61A and the inner surface 330A of the lower cover 33A is referred to as a ventilation position.

In this example, as indicated by the dashed line in FIG. 1, the tip 610A of the first outlet opening/closing portion 61A and the inner surface 330A of the lower cover 33A are brought into contact with each other, thereby opening the first outlet opening/closing portion 61A. A predetermined airtightness is maintained between the tip 610A and the inner surface 330A of the lower cover 33A.

Further, the flow dividing damper 6A rotates around the shaft 60A when the first outlet opening/closing portion 61A is displaced in the direction to open both the first outlet 21A and the ventilation outlet 23A. As indicated by the dashed line in , the tip 610A of the first outlet opening/closing portion 61A is positioned between the upper inner surface 270A of the circulation ventilation fan case 27A and the inner surface 330A of the lower cover 33A.

A state in which the tip 610A of the first outlet opening/closing portion 61A is positioned between the upper inner surface 270A of the circulation ventilation fan case 27A and the inner surface 330A of the lower cover 33A is referred to as the circulation ventilation position of the flow dividing damper 6A.

When the flow dividing damper 6A moves to the circulation position, the first outlet opening/closing part 61A opens the first outlet 21A. Further, the first outlet opening/closing part 61A partitions the air outlet 28A, and the first outlet opening/closing part 61A closes the ventilation outlet 23A.

Further, in the flow dividing damper 6A, the first outlet opening/closing portion 61A and the second outlet opening/closing portion 62A are integrally displaced, and in the circulation position, the second outlet opening/closing portion 62A is displaced by the second outlet inflow portion. Closing 24A closes the air passage from blowout air passage 28A to second air outlet 22A.

Here, the ventilating air path forming frame portion 281A has a portion facing the first air outlet opening/closing portion 61A of the flow dividing damper 6A in the circulation position, and has a shape along the upper surface 65A of the first air outlet opening/closing portion 61A. Open your mouth. As a result, when the flow dividing damper 6A moves to the circulation position, the air passage from the ventilation outlet 23A to the second outlet 22A is closed. As a result, the first air outlet 21A is opened, the second air outlet 22A and the ventilation outlet 23A are closed, and a circulation air passage communicating from the circulation ventilation inlet 20A to the first outlet 21A is formed. .

When the flow dividing damper 6A moves to the ventilation position, the first outlet opening/closing part 61A closes the first outlet 21A. Also, the first outlet opening/closing section 61A is retracted from the air outlet passage 28A, and the first outlet opening/closing section 61A opens the ventilation outlet 23A.

Further, in the ventilation position, the flow dividing damper 6A has a backflow preventing portion 63A of the second outlet opening/closing portion 62A in contact with the wall surface of the second outlet opening/closing portion 62A, and the second outlet opening/closing portion 62A is in contact with the second outlet. Close outlet 22A. As a result, the ventilation outlet 23A is opened, the first outlet 21A and the second outlet 22A are closed, and a ventilation air passage is formed.

On the other hand, when the flow dividing damper 6A is moved to the circulation ventilation position, the first outlet opening/closing part 61A is positioned near the middle of the outlet air passage 28A in the vertical direction, and the first outlet 21A and the ventilation outlet 23A are positioned. open both.

When the flow dividing damper 6A moves to the circulation ventilation position, a ventilation air passage is formed along the upper surface 65A of the first air outlet opening/closing portion 61A to communicate from the air outlet 28A to the ventilation outlet 23A. Further, the second outlet opening/closing portion 62A opens the second outlet 22A, thereby communicating from the outlet air path 28A to the second outlet 22A along the upper surface 65A of the first outlet opening/closing portion 61A. A circulation air passage is formed.

Further, when the flow dividing damper 6A moves to the circulating ventilation position, the second outlet opening/closing portion 62A opens the second outlet inlet portion 24A, and the blown air flows along the lower surface 64A of the first outlet opening/closing portion 61A. A circulation air passage is formed that communicates from the passage 28A to both the first outlet 21A and the second outlet 22A. As a result, both the first air outlet 21A, the second air outlet 22A, and the ventilation outlet 23A are opened to form both a circulating air path and a ventilation air path.

Therefore, in the bathroom ventilation drying heater 1A, one circulation ventilation fan 2A sucks air in the bathroom 100, blows the sucked air into the bathroom 100, discharges the sucked air to the outside, and sucks the air. part of the air is blown into the bathroom 100 and the rest is exhausted to the outside.

Further, in the bathroom ventilating/drying/heating machine 1A, one branch damper 6A opens and closes the first outlet 21A, the second outlet 22A, and the ventilation outlet 23A.

5A is a perspective view showing an example of the branch damper of the present embodiment, FIG. 5B is a plan view showing an example of the branch damper of the present embodiment, and FIGS. 5C, 5D, 5E and 5F are the It is a sectional view showing an example of a shunt damper of an embodiment. Here, FIG. 5C is an AA cross-sectional view of the shunt damper shown in FIG. 5B, FIG. 5D is a BB cross-sectional view of the shunt damper shown in FIG. 5B, and FIG. 5E is a C-C of the shunt damper shown in FIG. FIG. 5F is a sectional view taken along line DD of the shunt damper shown in FIG. 5B.

The flow dividing damper 6A includes an inflow restricting portion 66A that restricts the flow of air in the air passage width expanding portion 280A. The inflow restricting portion 66A is provided on the lower surface 64A of the first outlet opening/closing portion 61A. The lower surface 64A of the first outlet opening/closing portion 61A is concave, and the inflow restricting portion 66A is configured in a substantially flat shape protruding from the concave surface.

The flow dividing damper 6A has a flow dividing guide surface 67A that guides the air divided to the first blowing port 21A on the lower surface 64A of the non-formed portion where the inflow restricting portion 66A is not provided in the first blowing port opening/closing portion 61A. is configured.

In the flow dividing damper 6A, the width LB of the flow dividing guide surface 67A is approximately equal to the length between the tongue portion 27A1 and the second air passage forming portion 27A12 on the tip 610A side of the first outlet opening/closing portion 61A. , the shaft 60A side is configured to have a width approximately equal to that of the first outlet 21A.

For this reason, the inflow restricting portion 66A is configured such that the width LC of the inflow restricting portion 66A narrows from the tip 610A of the first outlet opening/closing portion 61A toward the shaft 60A. On the tip 610A side of the first outlet opening/closing portion 61A, which is on the upstream side, the flow of air that spreads in the direction along the axis 60A is restricted.

FIG. 6A is a plan view showing an example of the impeller of the present embodiment, and FIG. 6B is a side sectional view showing the example of the impeller of the present embodiment. The impeller 25A includes a multi-blade blade portion 250A and a blade support portion 251A provided with the blade portion 250A. The blade portion 250A has a predetermined height along the rotation axis direction of the impeller 25A, a predetermined width along the radial direction of the impeller 25A, and a width in the rotation direction of the impeller 25A indicated by arrow F. A plurality of blades 252A inclined forward are provided.

The blade portion 250A has a configuration in which a plurality of blades 252A are erected on one side of the blade support portion 251A along the rotation axis direction of the impeller 25A, and extend in the circumferential direction along the outer periphery of the blade support portion 251A. configured in parallel with

The blade support portion 251A is configured in a convex shape into which a motor case 260A covering the circulation ventilation fan motor 26A shown in FIG. 1 is inserted. The blade support portion 251A has an air inflow hole 253A through which air passes.

The air inflow holes 253A are configured by arranging a plurality of openings passing through the blade support portion 251A in parallel in the circumferential direction of the impeller 25A. The air inflow hole 253A has a downstream side portion 254A with respect to the rotation direction of the impeller 25A indicated by the arrow F, which is inclined in a predetermined direction with respect to the direction of air flow. In this example, the side portion 254A of the air inlet hole 253A is inclined in such a direction that the radially outer side recedes with respect to the radially inner side. In the air inflow hole 253A, the side portion 255A on the upstream side with respect to the rotational direction of the impeller 25A is similarly inclined in a direction in which the outer side retreats from the inner side in the radial direction.

In the blade support portion 251A, the side portion 254A of the air inflow hole 253A is the upstream side portion with respect to the rotational direction of the impeller 25A, and the side portion 255A of the adjacent air inflow hole 253A is the side portion of the impeller 25A. It becomes a side portion on the downstream side with respect to the rotation direction.

As a result, the impeller 25A also tilts in a direction in which the outer side of the impeller support portion 251A is retreated from the inner side in the radial direction, and the side portion on the upstream side and the side portion on the downstream side with respect to the rotation direction of the impeller 25A extend substantially in parallel, the opening area necessary for cooling the circulation ventilation fan motor 26A is ensured.

FIG. 7 is a plan view showing a detailed example of the blade shape of this embodiment. In specifying the shape of the blade 252A, the inlet angle of the blade 252A is β1, the outlet angle of the blade 252A is β2, the inner diameter of the blade 252A is D1, and the outer diameter of the blade 252A is D2. Also, the angle of inclination of the blade 252A from the center line OL is called θ, the length of the blade 252A is _L , and the thickness of the blade 252A is t.

The inlet angle β1 of the blade 252A is the angle between the tangent line C11 of the first imaginary circle C1 defined by the inner diameter D1 of the blade 252A and the blade 252A in the vicinity of the inner diameter. The exit angle β2 of the blade 252A is the angle between the tangent line C12 of the second imaginary circle C2 defined by the outer diameter D2 of the blade 252A and the blade 252A in the vicinity of the outer diameter.

The blade 252A preferably has an entrance angle β1 of 60° or more and 80° or less and an exit angle β2 of 130° or more and 150° or less. In addition, the outer diameter D2 of the blade 252A assumed in the bathroom ventilation drying heater 1A is about 150 mm or more and 200 mm or less, the length L of the blade 252A is about 10 mm or more and 20 mm or less, and the thickness t of the blade 252A is about 1 mm or more and 2 mm or less. is. Further, the inclination angle θ of blade 252A is preferably −5° or more and 30° or less.

FIG. 8 is an exploded perspective view showing an example of the bathroom ventilation/drying/heating machine of the present embodiment. The bathroom ventilating/drying/heating machine 1A includes a terminal block 8A to which a power line (not shown) is connected from the outside. The terminal block 8A is provided at one end of the terminal block support portion 80A, and the other end of the terminal block support portion 80A is rotatably supported by the main body portion 3A via a shaft 81A.

The terminal block 8A is provided with a grip portion 82A on a terminal block support portion 80A, and the orientation of the terminal block 8A can be changed from the other side of the main body portion 3A to one side by operating from one side of the main body portion 3A. be able to. This facilitates the operation of changing the orientation of the terminal block 8A after the main body 3A is installed.

The bathroom ventilating/drying/heating machine 1A includes a terminal block cover 83A that covers the terminal block 8A and the terminal block support portion 80A. The terminal block cover 83A is attached to the upper surface of the metal case 31A and is made of metal. A portion of the terminal block cover 83A facing the shaft 81A of the terminal block support portion 80A is sealed with a sealing member (not shown) to prevent entry of moisture or the like.

The bathroom ventilating/drying/heating machine 1A includes a substrate 9A on which a driving portion of the circulation ventilation fan motor 26A is mounted, a substrate cover 90A covering the periphery of the substrate 9A, and a substrate chassis 91A covering the lower surface of the substrate 9A. The substrate 9A is attached to the main chassis 30A via the substrate chassis 91A. The board chassis 91A is made of metal.

The board cover 90A is made of flame-retardant resin and has a shape that covers the side of the board 9A. The substrate cover 90A includes wiring guides 92A that hold and guide wiring (not shown) along the outer periphery. The substrate cover 90A also includes a wall portion 93A that covers the periphery of the shaft 81A of the terminal block support portion 80A. The terminal block 8A has a structure in which the terminal block support portion 80A is rotatable about the shaft 81A, and it is necessary to provide an opening in the metal case 31A to allow the rotation of the terminal block support portion 80A. Therefore, by providing the board cover 90A with the wall portion 93A that covers the periphery of the shaft 81A of the terminal block support portion 80A, the intrusion of moisture, dust, etc. into the metal case 31A is suppressed.

<Installation example of the bathroom ventilation drying heater of the present embodiment>
Next, an installation example of the bathroom ventilating/drying/heating machine 1A of the present embodiment will be described with reference to each drawing.

The bathroom ventilation/drying/heating machine 1A is installed on the ceiling panel 101 of the bathroom 100, as shown in FIGS. 4A and 4B. The ceiling panel 101 of the bathroom 100 is formed with an opening to which the main body 3A of the bathroom ventilation/drying/heating machine 1A is attached. It is attached to the ceiling panel 101 in such a manner that it is fixed to the reinforcing member provided.

The bathroom ventilating, drying and heating machine 1A has a front panel 4A attached to the lower surface of the main body 3A. It is arranged facing the inside of the bathroom 100 .

A bathroom ventilating/drying/heating machine 1A installed on a ceiling panel 101 of a bathroom 100 has an exhaust duct 102 attached to an exhaust duct joint 34A of a main body 3A. The exhaust duct 102 is connected to an outdoor grill 102a attached to the outer wall of the building (not shown) in which the bathroom 100 is installed.

The bathroom 100 includes a bathtub 103 and a washing area 104. - 特許庁The bathtub 103 is generally rectangular, and the bathtub 103 and the washing area 104 are arranged along the width direction of the bathtub 103 .

A bathroom 100 has a laundry pipe 105 as a clothes drying member above a bathtub 103 . Laundry pipe 105 extends along the longitudinal direction of bathtub 103 and is attached between walls 106a and 106b of bathroom 100 facing each other.

Note that the number of laundry pipes 105 installed in the bathroom 100 is about one or two, and this example shows an example in which one laundry pipe 105 is arranged. Further, the clothes drying member is not limited to a pipe-shaped member, and may be a string-shaped member or other member as long as it can dry the articles to be dried such as laundry.

The bathroom ventilating/drying/heating machine 1A is installed above the bathtub 103 so that the longitudinal directions of the first outlet grill 41A and the second outlet grill 42A are perpendicular to the longitudinal direction of the laundry pipe 105. be done.

As a result, in the bathroom ventilation/drying/heating machine 1A, the air blown out from the first outlet grille 41A spreads mainly in the direction perpendicular to the laundry pipe 105. As shown in FIG. On the other hand, the air blown out from the second outlet grille 42A is directed to the wall surface 106a of the bathroom 100 on the side where the second outlet grille 42A is provided.

<Example of operation of the bathroom ventilation/drying/heating machine of the present embodiment>
9 to 11 are explanatory diagrams showing the operation of the shunt damper in the bathroom ventilation, drying and heating machine of the present embodiment, and FIGS. Next, an operation example of the bathroom ventilating, drying and heating machine 1A according to the present embodiment will be described with reference to the explanatory diagrams showing the flow.

In the heating operation mode, the bathroom ventilation/drying/heating machine 1A sets the shunt damper 6A to the circulation position shown in FIG. 9, energizes the heater 5A, and drives the circulation ventilation fan motor 26A to rotate the impeller 25A.

In the bathroom ventilation/drying/heating machine 1A, the air in the bathroom 100 is sucked into the circulation ventilation suction port 20A from the suction port grill 40A of the front panel 4A by rotating the impeller 25A.

In the heating operation mode, since the shunt damper 6A is in the circulation position, substantially all of the air in the bathroom 100 sucked from the circulation ventilation suction port 20A flows to the first air outlet 21A. In the heating operation mode, the air flowing through the first air outlet 21A is heated by the heater 5A, and warm air is blown out from the first air outlet grille 41A of the front panel 4A.

In the heating operation mode, since the shunt damper 6A is in the circulation position, the air in the bathroom 100 is not ventilated. As a result, in the heating operation mode, the air in the bathroom 100 is circulated while hot air is blown out from the first outlet grill 41A, so that the temperature in the bathroom 100 can be raised to a temperature suitable for bathing. can.

Further, when the flow dividing damper 6A is in the circulation position, the ventilation outlet 23A as well as the second outlet inflow part 24A are blocked, so that the air that does not pass through the heater 5A is not blown out from the second outlet 22A. As a result, even in the heating operation mode executed during bathing, the air that has not been warmed by the heater 5A is not blown out, and the bather does not feel cold.

Furthermore, when the flow dividing damper 6A is in the circulation position, the ventilation air passage forming frame portion 281A communicating with the ventilation outlet 23A is blocked by the flow dividing damper 6A, so that the outside air flows back into the bathroom 100 from the second outlet 22A. can prevent you from doing it.

FIG. 13 is an explanatory diagram showing the flow of air. Next, the effects of the flow division damper 6A of this embodiment will be explained. When the flow dividing damper 6A moves to the circulation position, the lower surface 64A of the first outlet opening/closing portion 61A faces the circulation air passage. In the flow dividing damper 6A, a flow dividing guide surface 67A provided on a lower surface 64A of the first outlet opening/closing portion 61A is configured by a concave surface along the direction of air flow, and an inflow restricting portion 66A extends from the flow dividing guide surface 67A. It is configured in a shape protruding toward the circulating air passage.

The inflow restricting portion 66A is configured in such a shape that the width of the inflow restricting portion 66A narrows from the tip 610A of the first outlet opening/closing portion 61A toward the shaft 60A, and the width of the branch flow guide surface 67A On the tip 610A side of the first outlet opening/closing part 61A, the width is about the same as the length between the tongue part 27A1 and the second air passage forming part 27A12, and on the shaft 60A side, it is equivalent to the first outlet 21A. It is configured to have a width of about

13 passing between the second air passage forming portion 27A12 and the tongue portion 27A1 is widened by the branch guide surface 67A, as indicated by arrows W2L and W2R. Air passes through the entire width direction of the first outlet 21A, and an increase in ventilation resistance is suppressed. Further, the volume of the air passage width expanding portion 280A is reduced by the inflow restricting portion 66A, and the air becomes difficult to flow in the air passage width expanding portion 280A other than the portion where the first air outlet 21A is provided. Air passing between the air passage forming portion 27A12 and the tongue portion 27A1 is suppressed by the inflow restricting portion 66A from becoming turbulent in the air passage widening portion 280A, as indicated by the dashed arrow W3 in FIG. . Furthermore, the flow of air passing between the second air passage forming portion 27A12 and the tongue portion 27A1 is also widened by the air passage height enlarging portion 282A, thereby suppressing an increase in ventilation resistance.

Therefore, a predetermined air volume can be secured without increasing the rotation speed of the circulation ventilation fan motor 26A, and an increase in noise caused by increasing the rotation speed of the circulation ventilation fan motor 26A can be suppressed. The sound volume can be reduced by about 0.2 dB to 0.3 dB as compared with a configuration having a conventional shunt damper without the inflow restricting portion 66A.

Explaining other operation modes of the bathroom ventilation/drying/heating machine 1A, in the ventilation operation mode, the bathroom ventilation/drying/heating machine 1A sets the branch damper 6A to the ventilation position shown in FIG. The motor 26A is driven to rotate the impeller 25A.

In the bathroom ventilation/drying/heating machine 1A, the air in the bathroom 100 is sucked into the circulation ventilation suction port 20A from the suction port grill 40A of the front panel 4A by rotating the impeller 25A.

In the ventilation operation mode, since the shunt damper 6A is in the ventilation position, the first air outlet 21A and the second air outlet 22A are blocked, and substantially all of the air in the bathroom 100 sucked from the circulation ventilation inlet 20A is It flows to the ventilation outlet 23A and is exhausted to the outside. Therefore, in the ventilation operation mode, the steam and humidity in the bathroom 100 can be discharged to suppress dew condensation and the like, thereby suppressing the growth of mold.

In the drying operation mode, the bathroom ventilating/drying/heating machine 1A sets the shunt damper 6A to the circulation ventilation position shown in FIG. 11, drives the circulation ventilation fan motor 26A to rotate the impeller 25A, and energizes the heater 5A.

In the bathroom ventilation/drying/heating machine 1A, when the impeller 25A rotates, the air in the bathroom 100 is sucked into the circulation ventilation suction port 20A from the suction port grill 40A of the front panel 4A.

In the dry operation mode, since the branch damper 6A is in the circulation ventilation position, the circulation ventilation passage 28A communicates with the circulation ventilation inlet 20A to the first outlet 21A and the second outlet 22A. Both of the ventilation air passages communicating from the ventilation inlet 20A to the ventilation outlet 23A are formed.

As a result, part of the air RA in the bathroom 100 sucked from the circulation ventilation inlet 20A by the rotation of the impeller 25A flows to the first outlet 21A and the second outlet 22A. Further, the rest of the air in the bathroom 100 sucked from the circulation ventilation inlet 20A flows to the ventilation outlet 23A, passes through the exhaust duct 102, and is discharged to the outside as the exhaust EA from the outdoor grill 102a.

In the dry operation mode, the air flowing through the first air outlet 21A is heated by the heater 5A, and warm air HA is blown out from the first air outlet grille 41A of the front panel 4A. Since the air flowing through the second outlet 22A does not pass through the heater 5A, the air A corresponding to the room temperature is blown out from the second outlet grille 42A of the front panel 4A.

In the bathroom ventilating/drying/heating machine 1A, the air blown out from the first outlet grille 41A spreads in the longitudinal direction of the laundry pipe 105 and in the direction orthogonal to the laundry pipe 105.

However, since the bathroom ventilation drying heater 1A is arranged such that the longitudinal direction of the first outlet grille 41A is orthogonal to the laundry pipe 105, the air blown out from the first outlet grille 41A is mainly It spreads in a direction perpendicular to the laundry pipe 105 .

Therefore, the articles to be dried such as clothes hung on the laundry pipe 105 in the vicinity directly below the first outlet grille 41A are exposed to warm air in the entire width direction. On the other hand, the warm air blown out from the first outlet grille 41A directly blows onto the material to be dried hung on the laundry pipe 105 at a position away from directly below the first outlet grille 41A. Hard to hit.

In the bathroom ventilation/drying/heating machine 1A, the air A blown out from the second outlet grille 42A is directed to the wall surface 106a of the bathroom 100 on the side where the second outlet grille 42A is provided with respect to the first outlet grille 41A. directed to.

As a result, as shown in FIG. 12A, the air A blown out from the second outlet grille 42A in the drying mode hits one wall surface 106a of the bathroom 100, and flows along the wall surface 106a as indicated by the arrow A1. flow downwards. The air flowing downward along the wall surface 106a flows mainly toward the other wall surface 106b in the vicinity of the lower layer of the bathroom 100 as indicated by arrow A2.

In the bathroom ventilation/drying/heating machine 1A, the air RA sucked from the inlet grille 40A is used to generate a flow that circulates the air in the bathroom 100. Therefore, the air flowing near the lower layer of the bathroom 100 toward the other wall surface 106b. flows upward along the wall surface 106b as indicated by an arrow A3 and is sucked through the inlet grille 40A.

Thus, in the bathroom ventilating/drying/heating machine 1A, the air blown out from the second outlet grille 42A is directed downward along one wall surface 106a of the bathroom 100, and near the lower layer of the bathroom 100, the other wall surface 106b. , and upward along the other wall surface 106b.

The air blown out from the first outlet grille 41A of the bathroom ventilation, drying and heating machine 1A in the dry operation mode is warm air heated by the heater 5A, and the relative humidity is lowered. It is lighter than the air blown out from 42A.

Therefore, the air blown out from the second outlet grille 42A, which is heavier than the air blown out from the first outlet grille 41A, flows to the lower layer of the bathroom 100 and stirs the air throughout the bathroom 100. It can generate wind currents.

As a result, the hot air blown out from the first outlet grille 41A is hard to hit directly, even near the material to be dried hung on the laundry pipe 105 at a position away from directly below the first outlet grille 41A. Air currents can be generated.

Further, when the flow dividing damper 6A moves to the circulation ventilation position, the second outlet opening/closing portion 62A opens the second outlet opening/closing portion 22A, thereby blowing air along the upper surface 65A of the first outlet opening/closing portion 61A. A circulation air passage is formed that communicates from the passage 28A to the second outlet 22A.

Furthermore, when the flow dividing damper 6A moves to the circulating ventilation position, the second outlet opening/closing portion 62A opens the second outlet inflow portion 24A, and along the lower surface 64A of the first outlet opening/closing portion 61A, A circulation air passage is formed that communicates with both the first air outlet 21A and the second air outlet 22A from the air outlet 28A.

As a result, the air flowing along the upper surface 65A and the air flowing along the lower surface 64A of the first air outlet opening/closing portion 61A of the flow dividing damper 6A are blown out from the second air outlet 22A, and the wind speed can be increased. .

Further, even when the flow dividing damper 6A is moved to the circulation ventilation position, the flow of air passing between the second air passage forming portion 27A12 and the tongue portion 27A1 is widened by the flow dividing guide surface 67A, and the first air outlet is opened. Air passes through the entire width direction of 21A, and an increase in ventilation resistance is suppressed. In addition, the inflow restricting portion 66A prevents the air passing between the second air passage forming portion 27A12 and the tongue portion 27A1 from becoming turbulent in the air passage widening portion 280A.

Therefore, the air blown out from the second air outlet 22A can also have a predetermined air volume and air velocity without increasing the rotation speed of the circulation ventilation fan motor 26A. It is possible to suppress the increase in sound accompanying raising.

In the circulation ventilation operation mode, the bathroom ventilation drying heater 1A sets the branch damper 6A to the circulation ventilation position shown in FIG. 11, deactivates the heater 5A, and drives the circulation ventilation fan motor 26A to rotate the impeller 25A. Here, in the drying operation mode and the circulation ventilation operation mode described above, the opening of the branch damper 6A is adjusted to the ventilation outlet 23A so that the ventilation air volume, which is the air volume exhausted to the outside, is larger in the circulation ventilation operation mode. may be changed to a position where the opening of is widened.

In the bathroom ventilation/drying/heating machine 1A, the air in the bathroom 100 is sucked into the circulation ventilation suction port 20A from the suction port grill 40A of the front panel 4A by rotating the impeller 25A.

In the circulatory ventilation operation mode, since the shunt damper 6A is in the circulatory ventilation position, part of the air in the bathroom 100 sucked from the circulatory ventilation suction port 20A is directed to the first outlet 21A and the second outlet 22A. flow. Further, the rest of the air in the bathroom 100 sucked from the circulation ventilation inlet 20A flows to the ventilation outlet 23A and is exhausted to the outside.

In the circulating ventilation operation mode, since the heater 5A is not driven, the air CA corresponding to the room temperature is blown out from the first outlet grille 41A of the front panel 4A. Since the air flowing through the second outlet 22A does not pass through the heater 5A, the air A corresponding to the room temperature is blown out from the second outlet grille 42A of the front panel 4A.

In the bathroom ventilation drying heater 1A, as shown in FIG. 12B, even in the circulation ventilation operation mode, the air blown from the second outlet grill 42A is directed downward along one wall surface 106a of the bathroom 100, and the bathroom It is possible to generate an air flow near the lower layer of 100 toward the other wall surface 106b and upward along the other wall surface 106b.

As a result, even in the circulation ventilation operation mode, it is possible to generate a flow of air that agitates the air throughout the bathroom 100, and in the bathroom 100, the air blown out from the first outlet grille 41A is directly It can create airflow even in hard-to-reach places.

Therefore, the drying time for each wall surface, floor surface, etc. of the bathroom 100 can be shortened. In addition, since part of the air in the bathroom 100 is ventilated to the outside, moisture and the like can be discharged, and drying of the wall surfaces, floor surfaces, and the like of the bathroom 100 can be accelerated.

It should be noted that a configuration may be adopted in which part of the air flowing in the direction of the second outlet 22A is allowed to flow toward the inner surface of the front panel 4A. Retention can be suppressed.

Next, the effect of impeller 25A of this embodiment is explained. The impeller 25A has a blade support portion 251A formed in a recessed shape for receiving a motor case 260A covering the circulation ventilation fan motor 26A, and has blades 252A erected along the outer periphery of the blade support portion 251A.

In this way, since the blade support portion 251A is positioned inside the upper portion of the blade 252A supported by the blade support portion 251A, it is difficult for air to flow through the upper portion of the blade 252A, and the air passes through the blade support portion 251A. In a configuration in which no air inflow holes are provided, air does not pass through the entire height direction of the vane 252A, and ventilation resistance increases.

On the other hand, by providing an air inflow hole through which air can pass in the blade support portion 251A, the air can pass through the entire height direction of the blade 252A, thereby reducing ventilation resistance. However, in the conventional configuration in which the downstream side of the air inflow hole is substantially orthogonal to the direction of air flow with respect to the rotation direction of the impeller, Airflow resistance increases when exposed to air. In addition, so-called wind noise and pulsating noise are derived from the increase in ventilation resistance.

Therefore, in the impeller 25A of the present embodiment, as shown in FIG. 6A, the side portion 254A on the downstream side of the air inflow hole 253A is oriented in the direction of air flow with respect to the rotation direction of the impeller 25A indicated by the arrow F. tilts in a predetermined direction with respect to In this example, the radially outer side is inclined in a retreating direction with respect to the radially inner side. As a result, when the impeller 25A rotates, the air is prevented from concentrating on the side portion 254A on the downstream side of the air inlet hole 253A, and an increase in ventilation resistance is suppressed. Also, the air passes between the blades 252A over the entire height direction of the blades 252A. Furthermore, wind noise and pulsating noise are suppressed. Then, the air volume can be secured without increasing the rotational speed of the impeller 25A, the generation of noise can be suppressed, and the air passing through the air inflow hole 253A can easily flow, improving the cooling capacity of the circulation ventilation fan motor 26A. .

Next, the effects of the shape of the blade 252A will be described. In the bathroom ventilation/drying/heating machine 1A, the air sucked into the circulation ventilation fan 2A from the circulation ventilation inlet 20A passes through the filter. However, there is a possibility that dust or the like that cannot be captured by the filter will adhere to the blades 252A of the impeller 25A. When dust or the like adheres to the blades, the centrifugal force caused by the rotation of the impeller may cause the dust to separate and the clumps of dust to fall from the outlet. In addition, if dust or the like adheres to the blades, the ventilation resistance of the air passing between the blades increases, and there is a possibility that the air volume will decrease. In order to suppress the decrease in the air volume, it is necessary to increase the rotation speed of the impeller, which increases the noise.

Therefore, the blades 252A of the impeller 25A preferably have an inlet angle β1 of 60° or more and 80° or less and an outlet angle β2 of 130° or more and 150° or less. When the entrance angle β1 and the exit angle β2 are within the ranges described above, adhesion of dust to the blades 252A is suppressed. Compared to a configuration using a conventional impeller with an inlet angle β1 of 90° and an outlet angle β2 of 160°, if the amount of dust adhering to the blades of the conventional impeller is 100%, the amount of dust adhered is It can be reduced to about 30% to 70%.

In this way, since the adhesion of dust or the like to the blades 252A can be reduced, it is possible to prevent dust from accumulating and becoming a clump of dust, and the clump of dust is prevented from falling from the outlet. In addition, since the amount of dust adhering to the blades 252A can be reduced, it is possible to suppress an increase in the weight of the impeller 25A due to accumulation of dust and the deviation of the center of gravity of the impeller 25A. can suppress the generation of vibration and sound. Furthermore, an increase in the ventilation resistance of the air passing between the blades 252A is suppressed, the air volume can be secured without increasing the rotation speed of the impeller 25A, and the generation of noise can be suppressed.

Further, when the inlet angle β1 and the outlet angle β2 are within the ranges described above, a predetermined air volume can be secured without increasing the rotation speed of the circulation ventilation fan motor 26A, and the rotation speed of the circulation ventilation fan motor 26A is increased. It is possible to suppress the generation of sound accompanying this.

1A: bathroom ventilation drying heater (blower), 2A: circulation ventilation fan (blowing fan), 20A: circulation ventilation suction port (suction port), 21A: first outlet (circulation air outlet), 22A... second air outlet (circulation outlet), 23A... ventilation outlet, 25A... impeller, 250A... blade portion, 251A... blade support portion, 252A ... vane 253A ... air inflow hole 254A ... side portion 255A ... side portion 26A ... circulation ventilation fan motor 260A ... motor case 27A ... circulation ventilation fan Case (case portion) 27A1 Tongue portion 27A11 First air passage forming portion 27A12 Second air passage forming portion 270A Inner surface 28 Outlet air passage , 280A... Air passage width expanding portion, 281A... Ventilation air passage forming frame portion, 282A... Air passage height expanding portion, 3A... Main body portion, 30A... Main body chassis, 31A... Metal case 32A Flange portion 33A Lower cover 330A Inner surface 4A Front panel 40A Inlet grill 41A First outlet grill 42A . . . Second outlet grill 5A .. Heater 6A . , 62A... second outlet opening/closing part, 63A... backflow prevention part, 64A... lower surface (one surface), 65A... upper surface, 66A... inflow restricting part, 67A... Branch flow guide surface, 610A...tip, 100...bathroom

Claims (2)

A blower fan that draws in air and blows it out,
a circulation outlet through which the air blown into the room by the blower fan passes;
a ventilation outlet through which the air blown out by the blower fan passes;
A flow dividing member that is displaced by a rotational movement around an axis that intersects the flow of the air blown by the blower fan, and divides the air blown by the blower fan into the circulation outlet and the ventilation outlet. and
The blower fan
An impeller that is rotationally driven and a case that rectifies the flow of air generated by the impeller,
The case part is
a first air passage forming portion for straightening the air flow along the circumferential direction of the impeller; a second air passage forming portion for straightening the air flow along the tangential direction of the impeller; a tongue portion formed between a first air passage forming portion and the second air passage forming portion; and an air passage width expanding portion that widens an air passage through which air passes from the tongue portion to match the circulation outlet. and
The flow dividing member includes an air outlet opening/closing part that opens and closes the circulation air outlet, and is upstream of the air flow blown out by the blower fan and regulates the flow of air that spreads in the direction along the axis. Equipped with a regulatory department,
The outlet opening/closing part has a concave surface facing the circulation outlet,
The inflow restricting portion is formed in a planar shape protruding from the one surface of the outlet opening/closing portion toward the tip of the outlet opening/closing portion from the shaft side ,
The flow dividing member has a flow dividing guide surface formed by the one surface of the outlet opening/closing portion, which is a portion where the inflow restricting portion is not formed,
In the flow dividing member, the width of the flow dividing guide surface in the direction along the axis is on the upstream side with respect to the flow of air blown out by the blower fan, and is between the tongue portion and the second air passage forming portion. and the width of the circulation outlet on the downstream side with respect to the flow of air blown by the blower fan . The flow dividing member has a shape in which the width of the inflow restricting portion narrows from the upstream side with respect to the flow of air blown out by the blower fan toward the downstream side with respect to the flow of air blown out by the blower fan. Item 1. The blower device according to item 1.

Images