JPH0518620U - Air cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the noise level that is essential for the use of air purifiers. [Structure] A sound absorbing material is provided only behind the blower fan in parallel with the back surface of the blower fan.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is an air purifier that has an opening as an air intake vent on the front surface and an air blower fan on the extension of the vent, and aims to reduce the noise value essential for use. Regarding air purifiers.

[0002]

[Prior Art]

 Conventionally, in an air purifier, wind noise generated by rotation of a blower fan propagates to the outside through an opening. This propagating sound is composed of a direct sound generated by the fan and a reflected sound generated by repeated collisions with the surroundings. In general, the method of reducing the noise level of an air purifier is often based on research on the blade shape of a blower fan and the shape of a blower guide. Another simple method is to install a sound absorbing material inside the air duct system.

[0003]

[Problems to be solved by the device]

 By the way, the method based on the research on the shape of the air blower fan blade and the shape of the air blower guide requires a great deal of time and a huge development cost before the effect is exhibited. In addition, the method of installing the sound absorbing material in the air duct system needs to be installed everywhere in the air duct system, and an increase in product cost is inevitable.

An object of the present invention is to provide an air purifier having a simple structure, easy to manufacture, and a large soundproof effect in order to solve the above problems.

[0005]

[Means for Solving the Problems]

 For this reason, according to a number of researches and experiments conducted by the inventors of the present invention, in order to know the relationship between the place where the sound absorbing material is installed and the noise value, the sound absorbing material is installed on the entire inner surface of the air purifier where ventilation is performed. The sound absorbing material was sequentially removed, and the noise value of each was measured. As a result, it was found that the noise value was almost the same when the sound absorbing material was installed on the entire inner surface of the ventilation and when it was installed only on the back surface of the blower fan.

Therefore, in order to achieve the above object, the present invention provides an air purifier in which an opening serving as an air intake vent is provided on the front surface, and an air blower fan is provided on an extension of the vent. In addition, the air cleaner is characterized in that a sound absorbing material is provided only behind the blower fan in parallel with the back surface of the blower fan.

[0007]

[Action]

 By adopting the air purifier of the present invention, the sound absorbing material is provided only behind the blower fan in parallel with the back surface of the blower fan, so that the structure is simple, its manufacture is easy, and its noise value is low. And the soundproofing effect is improved.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a ceiling-embedded air cleaner according to an embodiment of the present invention, and FIG. 2 is a plan sectional view of FIG. 1 and 2, a ceiling-embedded air cleaner 1 is attached to a mounting hole provided in a ceiling plate 3 and has a front plate 5 provided with an opening (opening grille) 7 as a ventilation opening for ventilation. And a storage box 9 mounted behind the front plate 5. A filter 11 provided behind the opening grill 7, a blower guide 13 for guiding the air passing through the filter 11, a blower fan 15, a fan motor 17 and a blower fan 15 are provided in the housing box 9. A sound absorbing material 19 provided in parallel with the back surface of the is accommodated.

By driving the fan motor 17, the blower fan 15 rotates, and the wind noise generated by this rotation propagates to the outside through the opening grill 7. This propagating sound is composed of the direct sound generated by the fan and the reflected sound generated by repeated collisions with the surroundings. In particular, the sound generated by the collision finally collides with the back surface of the blower fan 15 while repeating the collision at various places, and the sound of the vertical component propagates from the opening grill 7 to the blower fan 15. Is what comes.

Therefore, by installing the sound absorbing material 19 only behind the blower fan 15 in parallel with the back surface of the blower fan 15, it becomes possible to absorb the reflected sound, and as a result, the noise value is reduced. It is reduced and the soundproof effect is achieved.

Next, FIG. 3 is a front view of a floor-standing air cleaner according to another embodiment of the present invention, and FIG. 4 is a side sectional view of FIG. 3 and 4, a floor-standing (stand-mounted) type air cleaner 21 includes an opening grill 25 serving as a suction ventilation opening and an opening grill 27 serving as a ventilation ventilation opening that opens above the opening grill 25. The front plate 23 is provided with a housing box 29 mounted behind the front plate 23. Inside the storage box 29, a filter 31 provided behind the opening grill 25, a fan 33 for sucking and introducing air through the filter 31, a fan motor 35, and a rear surface of the fan 33 are parallel to each other. The sound absorbing material 37, which is installed only behind the blower fan 33, is housed therein. In addition, 39 and 41 are operation switches and their display lamps.

The sound absorbing material 37 absorbs the reflected sound that is generated, reduces the resulting noise value, and achieves a soundproofing effect, similar to the sound absorbing material 19 of FIG.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other modes by making appropriate design changes.

[0015]

[Effect of the device]

 As is clear from the above description, the air purifier of the present invention effectively eliminates the problems of the conventional technology by providing the sound absorbing material only behind the blower fan in parallel with the rear face of the blower fan. Solved, its structure is simple, its manufacture is easy, its noise level is lowered, and its soundproofing effect is improved.

[Brief description of drawings]

FIG. 1 is a front view of a ceiling-embedded air cleaner according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a front view of a floor-standing air cleaner according to another embodiment of the present invention.

FIG. 4 is a side sectional view of FIG.

[Explanation of symbols]

 1 Ceiling-embedded air purifier 5,23 Front plate 7,25,27 Opening grill 9,29 Housing box 15,33 Blower fan 19,37 Sound absorbing material 21 Floor-standing air purifier

Claims (1)

[Scope of utility model registration request] 1. An air purifier in which an opening is provided on the front surface as an air intake ventilation opening, and a blower fan is provided on an extension of the ventilation opening, the back surface of the blower fan only behind the blower fan. An air purifier characterized by being provided with a sound absorbing material in parallel with.