JP2015224836A - Electric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric device that is equipped with an air blowing device and can restrain dust from adhering to a blowoff part of the air blowing device.SOLUTION: In an electric device, an air blowing device 2 is housed in a device body 1. The air blowing device 2 comprises a fan 11 and a scroll-shaped casing 7 that houses the fan 11. The casing 7 consists of a spiral scroll part 8 and a cylindrical blowoff part 9 connected to the scroll part 8. An ion generation device 12 that generates plus ions and minus ions is installed near a tongue part tip 10a of the casing on an inner wall 9a1 of the blowoff part 9.

Description

  The present invention relates to an electric device including a blower having a scroll-structure casing.

  Conventionally, as a blower device mounted on an electric device having a blower function, specifically, as shown in Patent Document 1 and Patent Document 2, a centrifugal fan having a scroll-shaped casing such as a sirocco fan or a turbofan is used. It is used a lot. As shown in the above-mentioned patent document, the centrifugal fan includes a spiral scroll part and a cylindrical blowing part connected to the scroll part, and air taken into the scroll part is supplied from the blowing part. The structure is blown out.

JP 2003-120972 A JP 2009-18221 A

  By the way, if the air blower mounted in the said electric equipment is operated, friction will arise between the air which passes the inside of a casing, and a casing, and a casing will be charged. As a result, there is a problem that dust floating in the air adheres and accumulates on the charged casing and is not preferable for hygiene.

  Then, in view of the above, an object of the present invention is to provide an electrical device that can suppress the adhesion of dust to the blowing portion of the blower.

  In order to achieve the above object, in the present invention, an electric device in which a blower is housed in a device body, the blower including a fan and a scroll-shaped casing for housing the fan, The casing is composed of a spiral scroll portion and a cylindrical blow-out portion provided continuously to the scroll portion, and positive ions and negative ions are provided on the inner wall of the blow-off portion in the vicinity of the front end of the tongue portion of the casing. The ion generator which generate | occur | produces is provided.

  According to the above configuration, since the ion generating device for generating positive ions and negative ions is provided in the blowing part, it is possible to electrically neutralize dust in the air and the inner wall of the casing, and the inner wall of the blowing part due to static electricity. It is possible to suppress the adhesion of dust to the surface. In the above-mentioned Patent Documents 1 and 2, an ion generator is installed in the blowout part. However, this ion generator only generates negative ions, and the dust in the air and the casing of the blowout part It is impossible to electrically neutralize (discharge) the charge.

  Furthermore, in this invention, the ion generator is arrange | positioned in the vicinity of the tongue part front-end | tip of a casing by the inner wall of a blowing part. That is, in the scroll-shaped casing, the speed of the air flowing through the blow-out portion is not uniform, and the wind speed decreases as it approaches the tongue portion of the casing when viewed in the direction orthogonal to the blowing direction. Therefore, among the inner walls of the blowing part, dust is more likely to accumulate on the inner wall part closer to the casing tongue as viewed in the direction perpendicular to the blowing direction.

  Therefore, as in the above-described configuration, the tip of the tongue portion of the casing that is located upstream of the blowing direction on the side where dust is likely to accumulate (the side closer to the casing tongue when viewed in the direction orthogonal to the blowing direction) on the inner wall of the blowing portion By installing the ion generating device in the vicinity of, dust adhesion can be effectively suppressed in all regions from the upstream side to the downstream side in the blowing direction of the inner wall on the side where dust is likely to accumulate.

  As described above, the electric device of the present invention is equipped with a blower, and an ion generator that generates positive ions and negative ions is provided in the vicinity of the tongue tip of the casing on the inner wall of the blowout portion of the blower. It is possible to effectively suppress the adhesion of dust to the blowing portion of the device.

The side view which shows the air cleaner of this invention AA sectional view of FIG. Partial enlarged view of FIG.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an air purifier will be described as an example of an electric device equipped with a blower having a scroll-shaped casing. FIG. 1 shows a side view of an air purifier according to the present invention, and FIG. 2 shows a cross-sectional view taken along the line AA of FIG.

  As shown in FIGS. 1 and 2, in the air cleaner of the present embodiment, a blower 2 is accommodated in an apparatus main body 1. The apparatus main body 1 is provided with an air inlet 3 and an air outlet 4, and an air passage 5 (indicated by a broken line arrow in the figure) extending from the air inlet 3 to the air outlet 4 is formed. The ventilation path 5 is provided with a filter 6 and a blower 2 in that order from the upstream side in the blowing direction (the direction of the broken line arrow in the figure). The air outlet 4 is composed of a rear outlet 4a provided on the upper rear side of the device body 1 and a front outlet 4b provided on the upper front side of the device body 1, and most of the air flows from the rear outlet 4a. A part of the air is blown out from the front outlet 4b.

  The blower 2 has a scroll-shaped (spiral) casing 7. The casing 7 includes a spiral scroll portion 8 and a rectangular tube-shaped blowout portion 9 provided continuously to the scroll portion. In the casing 7, a tongue portion 10 is formed at the boundary between the scroll portion 8 and the blowing portion 9.

  In the scroll unit 8, a sirocco fan 11 is accommodated as a centrifugal fan. The blowing part 9 is arranged from the scroll part 8 toward the rear outlet 4a, that is, from the scroll part 8 toward the rear upper side. The blowout portion 9 is formed as a widened portion 9a having a transverse cross-sectional shape formed in a rectangular shape, and the width on the left and right gradually widens from the tongue portion 10 to the middle of the rear blowout port 4a. The downstream side of the widened portion has a constant width. It reaches the rear outlet 4a as the constant width portion 9b.

  Accordingly, of the left and right side walls of the casing in the widened portion 9a, the casing side wall 9a1 on the side where the tongue portion 10 is formed is separated from the casing side wall 9a2 facing the side wall 9a1 as it goes downstream in the blowing direction. It is formed so as to be inclined. The blowout part 9 is branched at a constant width part 9b, and a passage having a smaller cross-sectional area than a passage reaching the rear blowout port 4a is connected to the front blowout port 4b. Thereby, most of the air sent out from the scroll unit 8 is blown out from the rear outlet 4a, and part of the air is blown out from the front outlet 4b.

FIG. 3 is a partially enlarged view of FIG. In the present invention, an ion generator 12 that generates positive ions and negative ions is provided in the vicinity of the tongue tip 10a. Thereby, the following effects are produced. In the figure, the direction and speed of the air flowing through the blowing portion 9 are indicated by the direction and length of the solid arrow. The longer the length of the arrow, the higher the air flow speed (wind speed).

  As shown in the figure, in the blower 2 having the scroll-shaped casing 7, the speed of the air flowing through the blow-out portion 9 is not uniform, and the wind speed is closer to the tongue portion 10 of the casing 7 when viewed in the direction orthogonal to the blower direction. Becomes smaller. Accordingly, among the inner wall of the blowout portion 9, in the region R (the region surrounded by the two-dot chain line in the figure) closer to the casing tongue as viewed in the direction orthogonal to the blowing direction, the inner wall of the casing is once charged with static electricity. When the dust is adsorbed by this, it is difficult to blow out the dust completely with only the momentum of the air passing through the region R, and as a result, the dust tends to accumulate.

  Therefore, by providing the ion generator 12 in the vicinity of the tongue tip 10a as described above, sufficient concentrations of positive ions and negative ions can be supplied to the entire region R. And it becomes possible to neutralize the inner wall of a casing centering on the dust in the air and the area | region R, and the adsorption | suction of the dust to the inner wall of the blowing part by static electricity can be suppressed effectively.

  The vicinity of the tongue tip 10a is preferably within 7 cm from the tongue tip 10a, and more preferably within 4 cm. Thereby, positive ions and negative ions can be supplied from a position close to the tongue tip 10a. In addition, although the installation position of an ion generator is so preferable that it is near the tongue part front end 10a, if it considers an installation space or a wind noise by an ion generator, etc., it is realistic about 1 cm apart.

Further, the wall of the blowing part 9 on which the ion generating device 12 is provided may be the front wall or the rear wall of the blowing part 9, but is provided on the casing side wall 9a1 provided continuously from the tongue tip 10a of the casing on the downstream side in the blowing direction. Is preferred. As a result, sufficient concentrations of positive ions and negative ions can be supplied to the surface of the casing side wall 9a1 where the wind speed is the slowest to neutralize the casing side wall 9a1 and dust.

  Further, when the blow-out portion 9 is disposed upward from the scroll portion 8 as in the present embodiment, the casing side wall 9a1 on the side where the tongue portion 10 is formed is formed as an upward inclined surface. The Therefore, when the operation of the air purifier (electric device) is stopped, dust in the air settles down due to gravity and accumulates on the casing side wall 9a1.

  Even in such a case, the ion generator 12 is installed on the casing side wall 9a1 and in the vicinity of the tongue tip 10a of the casing, so that the dust accumulated on the casing side wall 9a1 can be caused by the air passing through the blowout part 9. Can be easily blown away.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

(Second Embodiment)
In the present embodiment, an air cleaner has been described as an electric device on which a blower is mounted. However, the present invention is not limited thereto. For example, in addition to an air cleaner, an ion generator, a dehumidifier, a humidifier, a blower, or an air conditioner. Etc.

(Third embodiment)
In the present embodiment, the air outlet is branched to provide two air outlets, but it is needless to say that one air outlet can be provided. Furthermore, in this embodiment, although the fixed width part is formed in the downstream of the blowing part, it is good also as only a wide part without forming a fixed width part.

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Air blower 3 Air suction inlet 4 Air blower outlet 5 Ventilation path 6 Filter 7 Casing 8 Scroll part 9 Blowout part 10 Tongue part 11 Sirocco fan 12 Ion generator

Claims (4)

  An electric device in which a blower is housed in a device body, wherein the blower includes a fan and a scroll-shaped casing that houses the fan, and the casing includes a spiral scroll portion and the scroll An ion generating device for generating positive ions and negative ions is provided in the vicinity of the tongue tip of the casing on the inner wall of the blowing portion. Features electrical equipment.   The electric device according to claim 1, wherein the ion generation device is provided on a casing side wall that is provided continuously from a front end of a tongue portion of the casing to a downstream side in a blowing direction.   The electric device according to claim 1, wherein the blow-out portion is disposed upward from the scroll portion.   The electrical device according to claim 1, 2, or 3, wherein the electrical device is any one of an ion generator, an air cleaner, a dehumidifier, a humidifier, a blower, and an air conditioner.

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