JP4123876B2 - Centrifugal blower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centrifugal blower provided in a ventilation passage with a functional unit that acts on passing air, and is effective when applied to an air cleaner for a vehicle or a blower of a ceiling-embedded air conditioner.
[0002]
[Prior art]
As a conventional technique, like a vehicle air cleaner described in Japanese Patent Application Laid-Open No. 2002-46463, air passing through a ventilation path from a centrifugal multiblade fan (hereinafter abbreviated as a fan) to a blower outlet is used. There is an air blower provided with a functional unit that provides an action. In the above publication, the functional unit includes a filter carrying a photocatalyst and a light source for irradiating ultraviolet light.
[0003]
FIG. 7 is a schematic front view of such a conventional air purifier 100. 111 is a fan, 112 is a motor, 113 is a casing, 122 and 123 are filters in which a dustproof filter and a photocatalytic filter are combined. , 124 is an ultraviolet lamp, and 125 is a power supply portion thereof.
[0004]
[Problems to be solved by the invention]
When the functional unit that acts on the passing air is provided in the air passage, the functional unit is disposed in the main flow of the wind flow so as to act more effectively. Also in the example of FIG. 7, the filters 122 and 123 are disposed in the wind flow, and the ultraviolet lamp 124 (and the power supply portion 125) irradiates the ultraviolet light well on the entire surfaces of the filters 122 and 123, and therefore is disposed in the main stream of the wind flow. is doing.
[0005]
However, the functional unit is not only the part that must be placed in the wind flow. For example, in the above example, the power supply part 125 blocks the wind flow, thereby increasing the pressure loss and reducing the air volume. There is a problem that noise such as sound is also generated. However, separating the power supply part and placing it outside the ventilation path inevitably increases the size of the outer shape, which makes it difficult to fit in a limited space. However, there is a problem that the cost is increased in terms of assembly and the appearance is also deteriorated.
[0006]
The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to provide a centrifugal function that does not impair the air blowing performance and does not generate noise when the functional unit is arranged in the ventilation path. It is to provide an air blower.
[0007]
[Means for Solving the Problems]
To achieve the above object, employing the technical means described below. That is, in the first aspect of the present invention, the centrifugal apparatus has a large number of blades (111a) around the rotation shaft (112a) and blows out the air sucked in from the axial direction of the rotation shaft (112a). Casing (113) having a multi-blade fan (111) and a centrifugal multi-blade fan (111) and having a blow-out opening (114) for blowing out air, and a blow-out opening from the fan (111) of the casing (113) In the centrifugal blower provided with the functional unit (120) that acts on the passing air in the ventilation path to (114),
In the dead space of the wind flow generated by the nose portion (113c) of the scroll shape (113a) formed in the casing (113), at least one of the power supply unit (125) and the control circuit unit of the functional unit (120). It is characterized by arranging two .
[0008]
In the casing (113), a scroll shape (113a) in which an air flow path is wound is formed on the outer diameter side of the fan (111), and the main flow of air blown near the center of the air outlet (114). In some cases, a nose portion (113c) protruding inward of the casing (113) is formed at the rear end of the scroll shape (113a) so that the dead space of the wind flow generated by the nose portion (113c) is formed. We focused on and used it.
As a result, the air blowing performance is not impaired when the functional unit (120) is disposed in the ventilation path, and noise such as wind noise is not generated since the power source portion (125) is not easily hit by the wind. It can be set as a centrifugal blower (110). In addition, since the functional unit (120) can be accommodated in the ventilation path as it is, the outer shape can be reduced to a neat box shape, and the mountability to a vehicle or the like is excellent.
As described above, when the wind flow is in the main flow, the wind flow is blocked, so that the pressure loss is increased to reduce the air volume, and the present invention is effectively applied to a portion where noise such as wind noise is generated.
However, if the position is outside the main flow of the wind flow in the ventilation path, avoid a decrease in the air volume even if it is not an obvious wind flow dead space other than the wind flow dead space caused by the nose portion (113c). The effect of preventing the generation of noise is sufficiently obtained.
[0012]
The invention according to claim 2 is characterized in that the casing (113) has a plurality of outlets (114). This is because it is effective for a multi-directional blower such as the two-way blower vehicle air cleaner shown in the embodiment.
[0013]
In the invention described in claim 3 , the functional unit (120) is any one of a photocatalyst unit having an ultraviolet light source, a negative ion generation unit, a fragrance generation unit, an ozone deodorization unit, and a plasma deodorization unit. . As described above, the functional unit (120) is effective when the present invention is applied to an apparatus that acts on air passing therethrough.
[0014]
The Chi Scenery, reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in embodiments described later.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the blower according to the present invention is applied to a vehicle air purifier that purifies vehicle interior air, and FIG. 1 shows a state in which the air purifier 100 is assembled to a rear package tray 200 of the vehicle. FIG. 2 is a front view of the vehicle air cleaner 100. FIG.
[0016]
The air purifier 100 according to the present embodiment is started or stopped by an output signal of a smoke sensor (not shown) for detecting the degree of dirt or a manual switch (not shown) operated by a passenger. During operation, as shown in FIG. Air is introduced into the interior from an inlet 101 provided at a substantially central portion of the air cleaner 100, and the purified air is blown out from the outlet 102 into the vehicle interior.
[0017]
Next, the blower 110 according to the present embodiment will be described. 3 is a plan view (BB in FIG. 4) of the blower 110 according to the present embodiment, and FIG. 4 is a sectional view taken along the line AA in FIG. 111 has a number of blades (blades) 111a around the rotating shaft 112a, and a centrifugal multiblade fan (hereinafter abbreviated as a fan) that blows out air sucked in from the axial direction of the rotating shaft 112a. In this embodiment, a rear blade fan (turbo fan) having a fan exit angle of the blade 111a larger than 90 ° is employed.
[0018]
As shown in FIG. 3, the fan 111 is housed in a casing 113 made of resin (in this embodiment, polypropylene), and the casing 113 has a plurality of outlets 114 that blow out air (this In the embodiment, two) are formed. Further, a photocatalytic unit 120 for purifying air is disposed on the outlet 114 side of the casing 113 as a functional unit that acts on the air blown out from the fan 111.
[0019]
Then, on the outer diameter side of the fan 111 in the casing 113, the winding angle of the air flow path that starts from approximately the middle of the casing width and rotates approximately 180 ° to the vicinity of the center of the air outlet 114 on the opposite side. The scroll shape 113a having a small width is formed on both sides in the inner width direction of the casing 113. Therefore, nose portions 113b and 113c projecting inward of the casing 113 are formed before and after the scroll shape 113a.
[0020]
In the present embodiment, the inner space of the nose portions 113b and 113c is used as the fastening portion 113d of the upper and lower casings 113, and the casing 113 has a clean box shape.
[0021]
Incidentally, in FIG. 4, reference numeral 115 denotes a suction port that guides air introduced from the introduction port 101 into the casing 113, and air sucked from the suction port is placed on the inner diameter side of the fan 111 at the inner diameter edge of the suction port 115. A bell mouth 113e for guiding is integrally formed with the casing 113. Reference numeral 112 denotes an electric motor (driving means) that drives the fan 111, and the operation of the air cleaner 100 is controlled by ON-OFF control of the electric motor.
[0022]
Next, the photocatalytic unit 120 in this embodiment will be described. FIG. 5 is an exploded perspective view showing the configuration of the photocatalyst unit 120 according to this embodiment of the present invention, and FIG. 6 is a schematic sectional view of the photocatalyst unit 120 of FIG. Between the case 121, there are a dustproof filter 122 for removing dust and tobacco smoke in the air, a photocatalytic filter 123 for decomposing and removing odorous components in the air, and an ultraviolet lamp 124 for activating the photocatalyst. It is stored as shown in the figure.
[0023]
The ultraviolet lamp 124 is a surface light source so as not to obstruct ventilation as much as possible. The case 121 is made of a material that blocks radio noise from the ultraviolet lamp 124, and both sides are shield nets 126 that are air permeable. A power source portion 125 for supplying power to the ultraviolet lamp 124 is attached to one end of the filter portions in the longitudinal direction to constitute the photocatalyst unit 120, so that it can be easily detached from the casing 113.
[0024]
Next, features of the present embodiment will be described. A power supply portion 125 that does not require ventilation is disposed in the functional unit 120 at a position outside the main flow of the wind flow in the ventilation path. As a result, the centrifugal blower 110 does not impair the air blowing performance in disposing the functional unit 120 in the ventilation path, and does not generate wind noise or the like since the wind does not easily hit the power supply portion 125 or the like. It can be. In addition, since the functional unit 120 can be accommodated in the ventilation path as it is, the outer shape can be reduced to a neat box shape, and is excellent in mountability to a vehicle or the like.
[0025]
The position deviated from the main flow of the wind flow in the ventilation path uses a dead space of the wind flow generated by the nose portion 113c of the scroll shape 113a formed in the casing 113.
[0026]
This is because a scroll shape 113 a in which an air flow path is wound is formed on the outer diameter side of the fan 111 in the casing 113, and the rear end of the scroll shape 113 a so that the main flow of air blows to the vicinity of the center of the air outlet 114. In this case, a nose portion 113c protruding inward of the casing 113 may be formed, and this embodiment focuses on the dead space of the wind flow generated by the nose portion 113c.
[0027]
However, if the position is out of the main flow of the wind flow in the ventilation path, it is possible to avoid a decrease in the air volume or noise even if it is not an obvious dead space of the wind flow other than the dead space of the wind flow caused by the nose portion 113c. The effect of preventing the occurrence of is sufficiently obtained.
[0028]
Further, the casing 113 has a plurality of air outlets 114. This is effective for a multi-directional blower such as the two-way blower air cleaner shown in the present embodiment. The functional unit 120 may be any one of a negative ion generation unit, a fragrance generation unit, an ozone deodorization unit, and a plasma deodorization unit in addition to the photocatalyst unit of the present embodiment. Thus, the functional unit 120 is effective when the present invention is applied to an apparatus that acts on the passing air.
[0029]
The parts that do not require ventilation are the power supply unit 125 and the control circuit unit of these functional units 120. As described above, when the wind flow is in the main flow, the wind flow is blocked, so that the pressure loss is increased to reduce the air volume, and the present invention is effectively applied to a portion where noise such as wind noise is generated.
[0030]
(Other embodiments)
In the above-described embodiment, there are two air outlets 114 of the blower 110. However, the present invention is not limited to this, and the present invention can also be applied to one having three or more air outlets. In the above-described embodiment, the blower according to the present invention is applied to the vehicle air cleaner. However, the present invention is not limited to this and is also applied to other devices such as a ceiling-embedded air conditioner. be able to.
[0031]
In the above-described embodiment, the backward blade fan having a fan outlet angle larger than 90 ° is used. However, a forward blade fan having a fan outlet angle of 90 ° or less may be used.
[Brief description of the drawings]
FIG. 1 is a perspective view of an interior of a vehicle equipped with an air cleaner using a blower according to an embodiment of the present invention.
FIG. 2 is a plan view of an air cleaner using a blower according to an embodiment of the present invention.
FIG. 3 is a plan sectional view of the blower according to the embodiment of the present invention.
4 is a cross-sectional view taken along the line AA in FIG. 3;
FIG. 5 is an exploded perspective view showing a configuration of a photocatalyst unit according to the embodiment of the present invention.
6 is a schematic cross-sectional view of the photocatalytic unit of FIG.
FIG. 7 is a schematic front view of an air cleaner according to a conventional technique.
[Explanation of symbols]
111 Centrifugal multiblade fan 111a Blade 112a Rotating shaft 113 Casing 113a Scroll shape 113c Nose portion 114 Air outlet 120 Photocatalyst unit (functional unit)
125 Power supply

Claims (3)

A centrifugal multiblade fan (111) having a large number of blades (111a) around the rotating shaft (112a), and blowing out the air sucked in from the axial direction of the rotating shaft (112a) toward the outside of the diameter;
A casing (113) that houses the centrifugal multi-blade fan (111) and has an air outlet (114) for blowing out air;
In the centrifugal blower provided with a functional unit (120) that acts on the passing air in the ventilation path from the fan (111) to the air outlet (114) of the casing (113),
In the dead space of the wind flow generated by the nose portion (113c) of the scroll shape (113a) formed in the casing (113), at least one of the power supply unit (125) and the control circuit unit of the functional unit (120) Centrifugal blower characterized in that one of them is arranged. Prior Symbol casing (113), centrifugal blower according to claim 1, wherein the outlet (114) is characterized in that there are a plurality. Wherein the functional unit (120), according to claim 1 or 2, characterized in that any one of the photocatalytic unit negative ion generating unit fragrant odor generating unit ozone deodorizing unit plasma deodorizing unit having an ultraviolet light source Centrifugal blower.

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