EMBEDDED VENTILATION FAN

BACKGROUND
1. Technical Field

The present disclosure relates to an embedded ventilation fan.

2. Description of the Related Art

In an embedded ventilation fan of the related art, a configuration in which a decorative panel (design louver) is provided on a lower surface of a housing is known.

CITATION LIST
Patent Literature

PTL 1: Unexamined Japanese Patent Publication No. 2013-245870

SUMMARY

In such an embedded ventilation fan of the related art, there is a configuration in which a spring is inserted into a predetermined fixing portion as a method for attaching the decorative panel to the housing, but there is a problem that it is difficult to accurately align the decorative panel only by fixing the spring.

Therefore, the present disclosure solves the above-described problem of the related art, and an object of the present disclosure is to provide an embedded ventilation fan to which a decorative panel can be accurately attached.

Then, in order to achieve this object, an embedded ventilation fan according to an aspect of the present disclosure includes a housing, a decorative panel, an inner lid, and an air supply blower. The housing includes a side surface, an upper surface, and a lower surface, the decorative panel is provided on the lower surface, and includes a front surface, a rear surface, an air supply slit opening, a remaining region, and a light transmission portion. The inner lid is provided on the lower surface between the housing and the decorative panel, and the inner lid includes a display unit having a light emitting portion, and a first fitted portion, an air supply passage through which air is blown from an outside of a room into the room by the air supply blower is provided. The front surface is a surface opposite to the rear surface, the air supply slit opening is connected to the air supply passage, the remaining region is a region other than the air supply slit opening in the decorative panel, the rear surface includes a first fitting portion in the remaining region, the light transmission portion is a portion that transmits light emitted from the light emitting portion, and the light emitting portion is positioned directly above the light transmission portion by fitting the first fitting portion and the first fitted portion to each other.

According to the present disclosure, it is possible to provide the embedded ventilation fan to which the decorative panel can be accurately attached.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating an embedded ventilation fan according to a first exemplary embodiment;

FIG. 2 is a perspective view illustrating an inside of a housing;

FIG. 3 is a perspective view illustrating the housing and an inner lid;

FIG. 4 is a front view of the inside of the housing as viewed from below;

FIG. 5 is a perspective view illustrating the housing;

FIG. 6 is a perspective view illustrating an installation state of the embedded ventilation fan;

FIG. 7 is a diagram illustrating a portion near an adapter set;

FIG. 8 is a sectional perspective view illustrating an air supply blower or an air exhaust blower;

FIG. 9 is a perspective view illustrating a rear surface of a decorative panel;

FIG. 10 is an enlarged perspective view illustrating an example of a first fitting portion and a first fitted portion;

FIG. 11 is an enlarged perspective view illustrating another example of the first fitting portion and the first fitted portion; and

FIG. 12 is a sectional perspective view illustrating an example of a light transmission portion of the decorative panel.

DETAILED DESCRIPTIONS

Hereinafter, an exemplary embodiment of the present disclosure will be described with reference to the drawings.

First Exemplary Embodiment

First, a basic configuration of embedded ventilation fan 1 will be described.

As illustrated in FIGS. 1, 2, and 3, embedded ventilation fan 1 includes housing 2, adapter set 3, and air supply blower 7.

Housing 2 has first side surface 2a, second side surface 2b, third side surface 2c, adapter installation surface 2d, lower surface 2e, and upper surface 2f, which will be described later.

Adapter set 3 includes air supply adapter 3a, air exhaust adapter 3b, air exhaust shutter 3c, and adapter support portion 3d. Adapter set 3 is provided on adapter installation surface 2d.

Air supply blower 7 includes air supply casing 7a, air supply impeller 7b, air supply motor support plate 7c, air supply motor 7d, and air supply rotation shaft 7e, which will be described later.

Decorative panel 4 is provided on lower surface 2e of housing 2. Decorative panel 4 has air supply slit opening 4a, air supply slit 4b, air exhaust slit openings 4c, and air exhaust slits 4d. Decorative panel 4 has front surface 61a facing a space of a room.

Air exhaust slit openings 4c include first air exhaust slit opening 4c1, second air exhaust slit opening 4c2, and third air exhaust slit opening 4c3.

Metal fitting 5 is a component for embeddably providing housing 2 on a building ceiling or a building wall surface.

Metal fitting guide 6 is a component for preventing metal fitting 5 from falling off from housing 2. Metal fitting guide 6 is fixed to first side surface 2a and adapter installation surface 2d by using a fixing method such as a screw.

Metal fitting 5 and metal fitting guide 6 are attached to housing 2 substantially horizontally and substantially coaxially with each other, for example. Here, the term “substantially horizontally” includes an angle inclined within ±100 from a horizontal direction. The term “substantially coaxially” also includes an angle inclined within +10° from the same axis.

Screw hole 19 is a hole for connecting housing 2 and a beam provided on the building ceiling or the building wall surface with a screw.

Inner lid opening 8b is provided on lower surface 2e of housing 2. Inner lid 8 is provided to cover a part or the whole of inner lid opening 8b.

Connection member 9b is a member that forms an air passage near air supply blow-out port 9 of inner lid 8. Connection member 9b connects air supply blower 7 and air supply blow-out port 9.

Inner lid 8 has air supply blow-out port 9 and air exhaust suction port 28. Air supply blow-out port 9 is formed by, for example, a space surrounded by inner air supply blowing unit 68.

Control board 10 that controls an operation of embedded ventilation fan 1 is provided, for example, on inner lid 8.

Display unit 11 that displays a state of embedded ventilation fan 1 is provided, for example, on inner lid 8.

Inner lid 8 includes first spring engagement portion 26 and second spring engagement portion 27.

As illustrated in FIG. 4, embedded ventilation fan 1 includes air exhaust blower 12. Air exhaust blower 12 includes air exhaust casing 12a, air exhaust impeller 12b, air exhaust motor support plate 12c, air exhaust motor 12d, and air exhaust rotation shaft 12e, which will be described later.

Air supply side heat insulating plate 17 is provided between first side surface 2a and air supply motor support plate 7c. Air supply side heat insulating plate 17 is a plate that insulates heat between air supply passage 21 and housing 2. Air supply side heat insulating plate 17 is made of, for example, expanded polystyrene having excellent heat insulating performance. A thickness of air supply side heat insulating plate 17 is preferably equal to or more than 5 mm, and more preferably equal to or more than 10 mm.

Air exhaust side heat insulating plate 18 is provided between second side surface 2b and air exhaust motor support plate 12c. Air exhaust side heat insulating plate 18 is a plate that insulates heat between air exhaust passage 22 and housing 2. When air exhaust side heat insulating plate 18 is not provided, there is a possibility that the heat of air exhaust passage 22 is transferred to the room via housing 2. Air exhaust side heat insulating plate 18 is made of, for example, expanded polystyrene having excellent heat insulating performance. A thickness of air exhaust side heat insulating plate 18 is preferably equal to or more than 5 mm, and more preferably equal to or more than 10 mm.

Air supply passage 21 through which air is blown from an outside of the room into the room by air supply blower 7 is formed.

Air exhaust passage 22 through which air is blown from an inside of the room to the outside of the room by air exhaust blower 12 is formed.

Heat exchange element 15 is provided at a position where air supply passage 21 and air exhaust passage 22 cross each other. Heat exchange element 15 is disposed, for example, between air supply blower 7 and adapter set 3. Heat exchange element 15 is provided, for example, just above or directly above air exhaust suction port 28. Heat exchange element 15 is provided, for example, between air exhaust blower 12 and third side surface 2c.

Air passes through air supply adapter 3a, air supply filter 13, heat exchange element 15, air supply blower 7, air supply blow-out port 9, and air supply slit opening 4a in this order in air supply passage 21.

Air passes through air exhaust slit openings 4c, air exhaust suction port 28, air exhaust filter 14, heat exchange element 15, air exhaust blower 12, and air exhaust adapter 3b in this order in air exhaust passage 22.

As illustrated in FIG. 5, a surface facing lower surface 2e of housing 2 is upper surface 2f.

Power supply connection box 16 that houses a power supply cord is provided, for example, on first side surface 2a. Power supply connection box 16 may be, for example, near control board 10 inside housing 2.

As illustrated in FIG. 6, housing 2 of embedded ventilation fan 1 is embedded in a wall surface of the room or the like in an orientation in which decorative panel 4 provided on lower surface 2e faces downward. The wall surface mainly refers to a ceiling, but also includes the side walls of the room other than the ceiling. In this case, lower surface 2e does not face downward. At the time of installation, decorative panel 4 is exposed from the wall surface.

In the present disclosure, the “lower surface” indicates, for example, a position where embedded ventilation fan 1 faces downward in a scene in FIG. 6. In a scene where embedded ventilation fan 1 is provided on the wall surface other than the ceiling, the “lower surface” includes a case where embedded ventilation fan 1 does not face downward (in a direction in which gravity acts). However, the “lower surface” broadly means a position corresponding to this position. The same applies to “upper surface”, “directly below”, “directly above”, “up direction”, “down direction”, and the like.

As illustrated in FIG. 7, air supply damper 51 is provided near air supply adapter 3a.

As illustrated in FIG. 8, air supply blower 7 and air exhaust blower 12 may have similar configurations. Air supply impeller 7b is provided in air supply casing 7a. Air supply motor 7d is connected to air supply impeller 7b via air supply rotation shaft 7e. Air supply motor support plate 7c supports air supply motor 7d. Air supply motor support plate 7c faces first side surface 2a.

Air supply blower 7 is disposed inside housing 2 in a state where an axial direction of air supply rotation shaft 7e is substantially in the horizontal direction. Here, the term “substantially horizontally” includes an angle inclined within ±10° from a horizontal direction.

Air exhaust impeller 12b is provided in air exhaust casing 12a. Air exhaust motor 12d is connected to air exhaust impeller 12b via air exhaust rotation shaft 12e. Air exhaust motor support plate 12c supports air exhaust motor 12d. Air exhaust motor support plate 12c faces second side surface 2b.

Air exhaust blower 12 is disposed inside housing 2 in a state where an axial direction of air exhaust rotation shaft 12e is substantially in the horizontal direction.

As illustrated in FIG. 9, decorative panel 4 includes first spring 24 and second spring 25. First spring 24 is engaged with first spring engagement portion 26 (see FIG. 3). Second spring 25 is engaged with second spring engagement portion 27 (see FIG. 3).

Decorative panel 4 includes outer frame 47, reinforcing portion 48, and end portion 49. Outer frame 47 is an outer frame portion of decorative panel 4 on rear surface 61b. Reinforcing portion 48 reinforces outer frame 47. End portion 49 is a portion of an end present further outside outer frame 47.

Rear surface 61b may have outer air supply blowing unit 69 protruding toward the inside of housing 2. Outer air supply blowing unit 69 is connected to inner air supply blowing unit 68 of FIG. 3. At the time of connection, outer air supply blowing unit 69 is located outside air supply blowing unit 68. As a result, leakage of air flowing through air supply passage 21 to the outside of air supply passage 21 can be suppressed.

A characteristic configuration of the present exemplary embodiment will be described.

As illustrated in FIG. 3, inner lid 8 includes display unit 11 having light emitting portion 70 and includes first fitted portion 71.

Inner lid 8 may have second fitted portion 72. First fitted portion 71 and/or second fitted portion 72 have, for example, a recess shape.

Display unit 11 displays the state of embedded ventilation fan 1 by light emitting portion 70. For example, display unit 11 displays a replacement time of air supply filter 13 or displays a failure of air supply damper 51.

As illustrated in FIG. 9, decorative panel 4 includes rear surface 61b, remaining region 73, and light transmission portion 76.

Rear surface 61b is a surface facing inner lid 8. Rear surface 61b is a surface opposite to front surface 61a (see FIG. 1).

That is, remaining region 73 is a region other than air supply slit openings 4a and is a region other than air exhaust slit opening 4c in decorative panel 4.

Light transmission portion 76 is a portion that transmits light emitted from light emitting portion 70. For example, light transmission portion 76 is a hole penetrating decorative panel 4.

Rear surface 61b has first fitting portion 74 in remaining region 73. Rear surface 61b may have second fitting portion 75 in remaining region 73.

First fitting portion 74 has, for example, a protrusion shape protruding toward the inside of housing 2. First fitting portion 74 is fitted to first fitted portion 71, and thus, decorative panel 4 can be accurately attached to inner lid 8. As a result, light emitting portion 70 can be positioned directly above light transmission portion 76.

In a case where inner lid 8 has second fitted portion 72, second fitting portion 75 is fitted to second fitted portion 72. In this case, decorative panel 4 can be attached to inner lid 8 with higher accuracy.

In a case where first fitted portion 71, second fitted portion 72, first fitting portion 74, and second fitting portion 75 are not provided, decorative panel 4 is attached to inner lid 8 only by engaging first spring 24 with first spring engagement portion 26 and engaging second spring 25 with second spring engagement portion 27.

As described above, in a case where decorative panel 4 is attached to inner lid 8 only by the engagement of the springs, variation in a position of decorative panel 4 after attachment becomes large. As a result, it is difficult to accurately align decorative panel 4 and inner lid 8.

In a case where light emitting portion 70 is displaced from directly above light transmission portion 76, a part or all of light rays emitted from light emitting portion 70 is blocked by decorative panel 4. As a result, there is a possibility that a user is not be able to visually recognize the state of display unit 11.

On the other hand, in embedded ventilation fan 1 of the present exemplary embodiment, decorative panel 4 can be accurately attached to inner lid 8 by fitting first fitting portion 74 into first fitted portion 71.

For example, as illustrated in FIG. 10, first fitting portion 74 is fitted to first fitted portion 71 by bringing decorative panel 4 close to inner lid 8 in a direction of an arrow. As a result, positions of decorative panel 4 and inner lid 8 can be accurately aligned. As a result, light emitting portion 70 can be positioned directly above light transmission portion 76. Thus, the light emitted from light emitting portion 70 reaches an indoor side as designed. As described above, since the display by the light transmitted through decorative panel 4 can be performed more reliably, the user can sufficiently visually recognize the state of display unit 11.

In addition, two or more fitting structures may be provided. That is, second fitted portion 72 may be added to inner lid 8, and second fitting portion 75 may be added to remaining region 73. As a result, it is possible to suppress positional displacement caused by rotation of decorative panel 4 about a vertical direction (arrow direction in FIG. 10). In particular, in this configuration, a distance between first fitted portion 71 and second fitted portion 72 and a distance between first fitting portion 74 and second fitting portion 75 are increased, and thus, alignment accuracy can be enhanced.

In addition, as illustrated in FIG. 11, first fitted portion 71 may be formed around light emitting portion 70, and first fitting portion 74 may be formed around light transmission portion 76. With this configuration, it is possible to directly align light emitting portion 70 and light transmission portion 76. Thus, an alignment effect can be maximized.

In addition, although first fitting portion 74 and/or second fitting portion 75 have a protrusion shape protruding toward the inside of the housing and corresponding first fitted portion 71 and/or second fitted portion 72 have a recess shape, the present disclosure is not limited thereto. For example, even though first fitting portion 74 and/or second fitting portion 75 are formed in a recess shape and first fitted portion 71 and/or second fitted portion 72 are formed in a protrusion shape, both (the fitting portion and the fitted portion) can be fitted.

FIG. 11 is an example of the configuration. First fitted portion 71 having the protrusion shape is provided around light emitting portion 70 near display unit 11. Then, first fitting portion 74 having a recess shape corresponding to first fitted portion 71 is provided in decorative panel 4. Even with such a configuration, since fitting can be performed, alignment accuracy can be enhanced.

In addition, light transmission portion 76 may be a hole that transmits 100% of light, but may be other holes.

For example, as illustrated in FIG. 12, light from light emitting portion 70 can be transmitted by forming thin portion 76a (thin shape) thinner than surrounding remaining region 73 without forming a hole as light transmission portion 76.

In this case, although a transmittance of light transmission portion 76 is not 100%, it is possible to transmit light to such an extent that the user can visually recognize the light.

When light transmission portion 76 has a thin shape, it is not always possible to visually recognize light transmission portion 76 on front surface 61a of decorative panel 4 in FIG. 1. The user may be able to visually recognize light transmission portion 76 and/or light emitting portion 70 only by light emitting portion 70 emitting light.

In addition, in a case where light transmission portion 76 is formed as a hole, light transmission portion 76 (hole) can be visually recognized on front surface 61a of decorative panel 4 in FIG. 1.

In addition, second fitted portion 72 can have a shape similar to first fitted portion 71, and second fitting portion 75 can have a shape similar to first fitting portion 74. As described above, similarly to first fitting portion 74 is fitted to the first fitted portion 71, second fitting portion 75 can be fitted to second fitted portion 72.

In addition, in the present exemplary embodiment, although air exhaust blower 12 is disposed, at least air supply blower 7 may be disposed somewhere, and air exhaust blower 12 may not be necessarily provided.

Further, in embedded ventilation fan 1 of the present exemplary embodiment, air exhaust blower 12 and heat exchange element 15 are not essential components, and the air exhaust air passage may not be formed in housing 2 as long as first fitting portion 74 and first fitted portion 71 are fitted to each other.

In addition, although inner lid 8 is provided on lower surface 2e of housing 2 as a separate member from housing 2, inner lid 8 may have another configuration. For example, inner lid 8 may be provided on lower surface 2e integrally with housing 2.

In addition, the entire region other than the opening portions in decorative panel 4 can be considered as remaining region 73 (remaining area). That is, remaining region 73 is a region other than air exhaust slit openings 4c and a region other than air supply slit opening 4a in decorative panel 4. As described above, remaining region 73 refers to the entire region of decorative panel 4 other than the opening portions (air exhaust slit openings 4c and air supply slit opening 4a).

Hereinafter, the present exemplary embodiment will be supplemented.

Embedded ventilation fan 1 according to an aspect of the present disclosure includes housing 2, decorative panel 4, inner lid 8, and air supply blower 7. Housing 2 includes side surfaces (first side surface 2a, second side surface 2b, third side surface 2c, and adapter installation surface 2d), upper surface 2f, and lower surface 2e. Decorative panel 4 is provided on lower surface 2e, and includes front surface 61a, rear surface 61b, air supply slit opening 4a, remaining region 73, and light transmission portion 76. Inner lid 8 is provided on lower surface 2e between housing 2 and decorative panel 4. Inner lid 8 includes display unit 11 having light emitting portion 70, and first fitted portion 71. Air supply passage 21 through which air is blown from an outside of a room into the room by air supply blower 7 is formed. Front surface 61a is a surface opposite to rear surface 61b, air supply slit opening 4a is connected to air supply passage 21, and remaining region 73 is a region other than air supply slit opening 4a in decorative panel 4. Rear surface 61b includes first fitting portion 74 in remaining region 73, light transmission portion 76 is a portion that transmits light emitted from light emitting portion 70, and light emitting portion 70 is positioned directly above light transmission portion 76 by fitting first fitting portion 74 and first fitted portion 71 to each other.

According to this configuration, decorative panel 4 and inner lid 8 can be more accurately aligned by fitting. Thus, light emitting portion 70 can be accurately disposed directly above light transmission portion 76.

In addition, inner lid 8 may include second fitted portion 72, rear surface 61b may include second fitting portion 75 in remaining region 73, and light emitting portion 70 may be positioned directly above light transmission portion 76 by fitting second fitting portion 75 and second fitted portion 72.

According to this configuration, it is possible to suppress the rotation of decorative panel 4 about a vertical axis (axis parallel to the arrow direction in FIG. 10) by fitting at two locations. Thus, the effect of arranging light emitting portion 70 directly above light transmission portion 76 can be further enhanced.

In addition, first fitted portion 71 may be formed around light emitting portion 70, and first fitting portion 74 may be formed around light transmission portion 76.

According to this configuration, the alignment between light emitting portion 70 and light transmission portion 76 is directly performed. Thus, light emitting portion 70 can be more accurately disposed directly above light transmission portion 76.

In addition, light transmission portion 76 may be a hole.

According to this configuration, light directly reaches the indoor side when light emitting portion 70 is turned on. Thus, the user can easily visually recognize the light of light emitting portion 70.

In addition, light transmission portion 76 may have a thin shape thinner than the remaining region surrounding the light transmission portion.

According to this configuration, in a case where light emitting portion 70 is not turned on, light transmission portion 76 is hardly visible on front surface 61a. Thus, designability of decorative panel 4 can be further improved.

Although the embedded ventilation fan according to the present disclosure has been described based on the first exemplary embodiment, the present disclosure is not limited to the first exemplary embodiment. Configurations in which various variations conceived by those skilled in the art are applied to the first exemplary embodiments, and configurations established by combining components of different exemplary embodiments also fall within the scope of the present disclosure without departing from the gist of the present disclosure.

The embedded ventilation fan according to the present disclosure is useful as an embedded ventilation fan embedded in a wall surface such as a ceiling, a heat exchange ventilation device, or the like.

EMBEDDED VENTILATION FAN

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