JP2005351205A - Low noise device for blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein an issue is frequently posed by noise from a blower having a structure in which a spiral casing is provided with a discharge port through which air sucked through a suction port is exhausted in an approximate 90° direction, especially by noise from operation of a car washer at night, in regard to a car washer and a blower situated at a factory. <P>SOLUTION: In a low noise device for a blower surrounding the blower formed that an impeller is situated in a casing having the suction port and the discharge port, the low noise device consists of a first and a second sound absorbing wall which are situated at a proper distance, the first sound absorbing wall is provided with a suction opening and a discharge opening, a suction passage is formed between the first and second sound absorbing walls, and the noise of a whole of the casing and the suction opening of the first sound absorbing wall can be prevented from the generation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a low-noise device for a car wash machine and a blower installed in a factory.

  Conventionally, in a car wash machine and a blower deployed in a factory, the noise is a problem in a blower having a discharge casing that exhausts air sucked from a suction port in a direction approximately 90 degrees into a spiral casing. In many cases. And in the car wash machine of the gas station which uses this kind of air blower, solution of the noise problem is considered necessary. The reason is that this gas station is installed in the vicinity of the house, the operation regulation of car wash machines becomes a problem, or the 24-hour business of gas stations tends to increase in recent years. There are some things.

  And as a prior literature regarding this noise countermeasure, since the following (1) and literature (2) are mentioned, the outline is explained. Document (1) is “Low Noise Blower in Car Wash Machine” disclosed in Japanese Utility Model Publication No. 62-52065. The configuration is a configuration in which a sound absorbing material is provided at the suction port of the blower so as to face the suction port with an appropriate distance from the suction port, and is intended to reduce noise due to the suction sound of air. However, this device is a part of noise countermeasures (soundproofing or sound absorption), such as a sound absorbing material attached to the spiral casing itself or a sound absorbing material attached to the suction port, and is not a so-called noise prevention device for the entire casing. Therefore, the soundproofing effect is not always sufficient. For example, the noise problem of a car wash machine has not been solved in a night measure or a situation where a house is built near a gas station. Reference (2) is a “casing” disclosed in Japanese Patent Application Laid-Open No. 2003-139095. The structure is composed of a scroll casing (housing) and a sound absorbing material (outer body) made of a soft member provided in the scroll casing, and the sound absorbing (soundproofing) effect is achieved through the sound absorbing material. The strength of the casing is intended to achieve the strength as a casing. The present invention is suitable for a structure in which a casing forms a part of a vehicle as a part of the vehicle. However, it is not a problem in situations where outside air and / or moisture contact and scatter, such as a car wash machine, or a lack of structural strength, etc., when placed alone in a factory. There are improvements such as becoming.

Japanese Utility Model Sho 62-52065

JP2003-139095

  In the above references (1) and (2), a soundproofing effect can be expected. However, in the document (1), some noise in the casing is prevented, and some technical problems to be structurally improved remain in order to achieve sound insulation of the entire blower. Further, in Document (2), since the casing is composed of a soft member, there is a problem in strength, and it is considered that the casing may be limited to use in a specific field.

  In addition, the present applicant intends to improve the prior art including the above references (1) and (2), and has already been submitted as “low noise device for blower” in Japanese Patent Application No. 2004-136120.

  In view of the above, it is an object of the present invention to provide a low-noise device for a blower that is practically satisfactory and that achieves sound insulation of the entire blower as quickly as possible. In addition to preventing this noise, it is intended to secure the amount of suction required by the blower, to avoid deterioration of the function of the blower, and to secure the amount of blown air.

  The invention of claim 1 is intended to provide a low-noise device for a blower that is practically satisfactory and that achieves sound insulation as quickly as possible for the entire blower. In addition to preventing this noise, it is intended to secure the amount of suction required by the blower, to avoid deterioration of the function of the blower, and to secure the amount of blown air. Furthermore, by ensuring the flow of air (wind) surrounding the casing to achieve a soundproofing effect (sound absorbing effect), and by providing a sound absorbing means for improving the sound absorption of the first sound absorbing wall on the inner wall body, It is intended to further improve the soundproofing effect.

Claim 1 is a low noise device for a blower that provides an impeller in a casing having a suction port and a discharge port, and surrounds the blower provided with a motor for driving the impeller in the casing,
The low noise device includes a first sound absorbing wall disposed so as to have an appropriate distance from the casing, and a second sound absorbing wall provided on the motor side provided to be spaced from the first sound absorbing wall. The first sound absorbing wall includes a suction opening and a discharge opening that open to the suction port and the discharge port, and the first sound absorbing wall includes a hard inner and outer wall body, and an inner and outer wall body. The space between the first and second sound absorbing walls is formed of an enclosed sound absorbing material, and an opening area substantially corresponding to an exhaust area from the discharge port is formed, and the first and second sound absorbing walls are formed on the inner wall body. A low-noise device for a blower characterized in that a sound-absorbing means for improving the sound absorption of the two sound-absorbing walls is provided.

  The inventions of claims 2 to 5 are intended to achieve the object of claim 1 and to provide an optimal inner wall body for achieving the object.

  A second aspect of the present invention is a low noise device for a blower in which the sound absorbing means according to the first aspect is a hole provided in the inner wall body.

  According to a third aspect of the present invention, the sound absorbing means according to the first aspect is a low noise device for a blower which is a hole with a burring provided in an inner wall body.

  According to a fourth aspect of the present invention, the sound absorbing means according to the first aspect is a low noise device for a blower which is a flocked body provided on the inner wall.

  According to a fifth aspect of the present invention, the sound absorbing means according to the first aspect is a low noise apparatus for a blower having a structure of an inner wall body of a mesh.

  The invention of claim 6 is intended to achieve the object of claim 1 and to provide a suction opening of the first sound absorbing wall that is optimal for achieving this object.

  A sixth aspect of the present invention is a low noise device for a blower in which the suction opening of the first sound absorbing wall according to the first aspect is configured to open so as to surround the motor of the blower.

  The invention of claim 7 is intended to achieve the object of claim 1 and to provide a sound-absorbing material optimal for achieving this object.

  A seventh aspect of the present invention is a low noise device for a blower in which the sound absorbing material according to the first aspect is a sound absorbing and sound insulating material.

  The invention of claim 8 is intended to achieve the object of claim 1 and to provide a first sound-absorbing wall that is optimal for achieving this object.

  An eighth aspect of the present invention is a low noise device for a blower configured such that the first sound absorbing wall according to the first aspect is a sound absorbing and sound insulating wall.

The invention of claim 1 is a low noise device for a blower that surrounds a blower in which an impeller is provided in a casing having a suction port and a discharge port, and a motor that drives the impeller is provided in the casing.
The low noise device is formed of a first sound absorbing wall disposed so as to have an appropriate interval between the casing and a second sound absorbing wall provided on the motor side provided so as to be spaced from the first sound absorbing wall. The first sound absorbing wall includes a suction opening and a discharge opening that open to the suction opening and the discharge opening, and the first sound absorbing wall includes a hard inner and outer wall body and a sound absorbing material surrounded by the inner and outer wall bodies. In addition, the interval provided in the first and second sound absorbing walls forms an opening area that substantially corresponds to the exhaust area from the discharge port, and the sound absorption that controls the sound absorption of the first and second sound absorbing walls on the inner wall body It is a low noise device for a blower provided with means.

  Therefore, claim 1 is characterized in that it can provide a low noise device for a blower that is practically satisfactory and can achieve a sound insulation of the entire blower as quickly as possible. In addition to this noise prevention, there are practical benefits such as ensuring the amount of suction required by the blower, avoiding deterioration of the function of the blower, and ensuring the amount of blown air. Furthermore, by providing a sound absorbing means that can achieve a soundproofing effect (sound absorbing effect) by securing the flow of air (wind) surrounding the casing, and is provided on the inner wall body to improve the sound absorption of the first sound absorbing wall, There is a feature that the soundproofing effect can be further improved.

  The invention according to claim 2 is a low noise device for a blower in which the sound absorbing means according to claim 1 is a hole provided in the inner wall body.

  The invention according to claim 3 is a low noise device for a blower in which the sound absorbing means according to claim 1 is a hole with a burring provided in the inner wall body.

  According to a fourth aspect of the present invention, there is provided a low noise device for a blower in which the sound absorbing means according to the first aspect is a flocked body provided on the inner wall.

  According to a fifth aspect of the present invention, there is provided a low noise apparatus for a blower in which the sound absorbing means according to the first aspect has a structure of a mesh inner wall.

  Accordingly, claims 2 to 5 have the characteristics that the object of claim 1 can be achieved, and an inner wall body optimal for achieving the object can be provided.

  The invention of claim 6 is a low noise device for a blower in which the suction opening of the first sound absorbing wall according to claim 1 is opened so as to surround the motor of the blower.

  Accordingly, the sixth aspect is characterized in that the object of the first aspect can be achieved, and the suction opening of the first sound absorbing wall that is optimal for achieving the object can be provided.

  The invention according to claim 7 is a low noise device for a blower in which the sound absorbing material according to claim 1 is a sound absorbing and sound insulating material.

  Accordingly, the seventh aspect is characterized in that the object of the first aspect can be achieved and a sound-absorbing material optimal for achieving the object can be provided.

  The invention according to claim 8 is a low noise device for a blower in which the first sound absorbing wall according to claim 1 is a sound absorbing and sound insulating wall.

  Therefore, claim 8 is characterized in that the object of claim 1 can be achieved and that the first sound-absorbing wall optimal for achieving this object can be provided.

  Hereinafter, embodiments (forms) of the present invention will be described.

  Reference numeral 1 denotes a casing of the blower A. The spiral casing 1 is provided with a suction port 2 and a discharge port 3, and air from the suction port 2 is exhausted to the outside through the discharge port 3. The casing 1 is provided with an impeller 4 and a motor 5 for driving the impeller 4 is provided in the casing 1, and the impeller 4 is rotated by driving the motor 5, Enable exhaust. This blower A is a normal form. For example, when the motor 5 is an external fan system, a system in which the impeller 4 is directly connected to the shaft of the motor 5 is adopted, thereby simplifying the overall structure and saving the number of parts. Or the external structure is made compact and the cooling effect of the motor 5 is intended. However, the outer fan method and / or the method in which the impeller 4 is directly connected to the shaft of the motor 5 is an example and is not limited. Note that the motor can be employed even when it is fully closed (not shown).

  And the 1st sound absorption wall B for air blowers which surround this air blower A is provided. In this example, the first sound absorbing wall B is provided in the casing 1 of the blower A at an appropriate interval. The first sound absorbing wall B forms a suction opening 6 and a discharge opening 7 that open along the suction port 2 and the discharge port 3. In the illustrated example, the suction opening 6 is provided on the back surface 1a (the side on which the motor 5 is provided) of the casing 1 and the structure facing the suction port 2 is adopted. For example, from the suction port 2 and / or the suction opening 6 With the sucked air, the noise generated around the casing 1 is surely caught, and the structure is such that noise does not leak outside the first sound absorbing wall B. Preferably, the suction opening 6 surrounds the motor 5 and a passage 50 is provided around the motor 5 as in the first example of FIGS. 1 to 3, and the motor 5 is cooled as described above. While improving, durability is improved and damage to the lubrication part is avoided.

  A second sound absorbing wall C is formed so as to surround the suction opening 6 and the suction opening side of the first sound absorbing wall B, and a suction passage 51 is formed between the first sound absorbing wall B and the second sound absorbing wall C. . And it is the structure which makes the suction amount of this suction passage 51 and the discharge amount of the discharge opening 7 substantially the same, and ensures the effect | action of this air blower A, efficiency improvement of the noise absorption, etc. The second sound absorbing wall C is ideally configured on the first sound absorbing wall B via a support means (not shown), but is not limited thereto.

  As shown in FIG. 4, the first and second sound absorbing walls B and C are made of hard inner and outer wall bodies 8 and 9, and a sound absorbing material 10 and / or a sound insulating material surrounded by the inner and outer wall bodies 8 and 9. 100. A sound absorbing means D for improving sound absorption is provided on all or part of the inner wall body 8. As shown in FIGS. 6-1 to 6-5, the sound absorbing means D includes a convex portion 11 (there is also an outer wall body 9), a hole 12, a protrusion 13, and a hole with a burring (not shown). Although not shown, meshes, flocking, etc. are provided individually or in combination. Then, the noise caused by the collision between the intake air and the motor 5 or the vibration of the motor 5 itself is absorbed by a part of the first sound absorbing wall B and the second sound absorbing wall C. At the time of absorption, the sound absorbing means D plays a major role.

  It is desirable that the suction opening 6 of the first sound absorbing wall B has a wraparound shape on the inside, and the wrapping portion 600 is designed to catch noise and / or prevent diffusion (guard). That is, the noise generated mainly by the back surface 1a of the casing 1 and the first and second sound absorbing walls B and C is guarded by the wrapping portion 600, and the noise prevention is expanded.

  7, 8, and 10 show second to fourth examples. The sound absorbing material 10 is partially or entirely around the casing 1 (for example, the back surface 1 a, the suction port 2, etc. where the noise is severe). In addition, it is a configuration in which the sound insulating material 100 is provided. Desirably, the combination with the first sound absorbing wall B is intended to prevent noise almost completely. FIGS. 8 to 9-2 show the third and fourth examples in which the second sound absorbing wall C is formed in a plate shape, and although not shown, the bent portion (wraparound portion) is omitted to reduce the size. In addition, the amount of suction will be increased while reducing costs. Further, the fourth example of FIG. 11 is a compromise structure of the examples of FIG. 1, FIG. 7 and FIG. 8, and has features such as being able to deal with each feature, installation location, and enhancing versatility. In the fifth example of FIG. 12, the suction opening 6 is formed in the back surface 1 a of the casing 1, air is sucked from the back surface 1 a, and the suction port 2 is formed via a bypass passage 52 (formed around the casing 1). It is the structure which leads. In this example, since the suction opening 6 of the first sound absorbing wall B is formed on the back surface 1 a of the casing 1, the second sound absorbing wall C is provided on the back surface 1 a of the casing 1. A suction passage 51 is formed between the first sound absorbing wall B and the second sound absorbing wall C. In addition, the configuration of the second sound absorbing wall C, the mode of use thereof, the air flow in this example, and the features such as noise prevention are all in accordance with the above-described examples.

  E is a car wash machine E, and this car wash machine E has a portal-shaped moving frame 20, nozzles 21, and wheels 22, as shown in FIG. In the figure, reference numeral 23 denotes a rail provided on the floor.

  In addition, the arrow in a figure shows the flow of air.

Sectional drawing seen from the suction inlet which showed the 1st example of this invention Side view of FIG. Sectional view in plan view of FIG. Expanded sectional view of the first and second sound absorbing walls The expansion perspective view of the 2nd sound absorption wall in the 1st example of Drawing 1 Expanded sectional view showing a second example of the first sound absorbing wall and / or the second sound absorbing wall An enlarged front view showing a third example of the first sound absorbing wall and / or the second sound absorbing wall Expanded sectional view showing a fourth example of the first sound absorbing wall and / or the second sound absorbing wall The expanded sectional view which showed the 5th example of the 1st sound absorption wall and / or the 2nd sound absorption wall An enlarged front view showing a sixth example of the first sound absorbing wall and / or the second sound absorbing wall Sectional drawing seen from the suction inlet which showed the 2nd example of this invention Sectional drawing seen from the suction inlet which showed the 3rd example of this invention The expanded sectional view of the 2nd sound absorption wall in the 3rd example of Drawing 8 9-1 is an enlarged cross-sectional view partially missing the main part of FIG. Sectional drawing seen from the suction inlet which showed the 4th example of this invention The expanded sectional view of the 2nd sound absorption wall in the 4th example of Drawing 10 Sectional drawing seen from the suction inlet which showed the 5th example of this invention Schematic diagram of the car wash machine with the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 1a Back 2 Suction port 3 Discharge port 4 Impeller 5 Motor 50 Passage 51 Suction passage 52 Detour passage 6 Suction opening 600 Circulation part 7 Discharge opening 8 Inner wall body 9 Outer wall body 10 Sound absorption material 100 Sound insulation material 11 Protrusion part 12 Hole 13 ridge 20 moving frame 21 nozzle 22 wheel 23 rail A blower B first sound absorbing wall C second sound absorbing wall D sound absorbing means E car wash machine

Claims (8)

A low noise apparatus for a blower that provides an impeller in a casing having a suction port and a discharge port, and surrounds the blower provided with a motor that drives the impeller in the casing,
The low noise device includes a first sound absorbing wall disposed so as to have an appropriate distance from the casing, and a second sound absorbing wall provided on the motor side provided to be spaced from the first sound absorbing wall. The first sound absorbing wall includes a suction opening and a discharge opening that open to the suction port and the discharge port, and the first sound absorbing wall includes a hard inner and outer wall body, and an inner and outer wall body. The space between the first and second sound absorbing walls is formed of an enclosed sound absorbing material, and an opening area substantially corresponding to an exhaust area from the discharge port is formed, and the first and second sound absorbing walls are formed on the inner wall body. A low noise device for a blower, characterized in that a sound absorbing means for improving sound absorption of the two sound absorbing walls is provided.   The sound absorbing means according to claim 1 is a low noise device for a blower which is a hole provided in an inner wall body.   The low noise device for a blower, wherein the sound absorbing means according to claim 1 is a hole with a burring provided in an inner wall.   The sound absorbing means according to claim 1 is a low noise device for a blower which is a flocked body provided on an inner wall.   The sound absorbing means according to claim 1 is a low noise device for a blower in which the structure of the inner wall body is a mesh.   A low noise device for a blower, wherein the suction opening of the first sound absorbing wall according to claim 1 is an opening surrounding a motor of the blower.   A low noise device for a blower, wherein the sound absorbing material according to claim 1 is configured to be a sound absorbing and sound insulating material.   The low noise device for a blower, wherein the first sound absorbing wall according to claim 1 is configured to be a sound absorbing and sound insulating wall.

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