JP2012115795A - Dust collector equipped with silencer having work exhaust cooling function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector which can inexpensively cool work exhaust with a simple composition.SOLUTION: The dust collector uses a cooling wind introduction type blower motor and is equipped with a silencer for reducing an exhaust sound. In the dust collector, cooling wind exhaust and the work exhaust are introduced into the silencer and mixed in the silencer to decrease the temperature of the work exhaust.

Description

  The present invention relates to a dust collector equipped with a silencer having a work wind exhaust cooling function. More specifically, the present invention relates to a dust collector equipped with a silencer that cools the work air exhaust by mixing the motor cooling air exhaust and the work air exhaust.

  2. Description of the Related Art Conventionally, a dust collector that uses a blower motor to suck dust-containing air is known as a dust collector that separates dust and air from the dust-containing air using a filter in the dust collector. In such a dust collector, clean air from which dust has been removed by a filter passes through the blower motor and is discharged out of the dust collector as work wind exhaust.

  Blower motors used in this type of dust collector are mainly divided into two types depending on the motor cooling method. One is a type in which work-style exhaust is directly used for cooling a motor, which is a so-called direct type. The other is a type in which air for cooling the motor is introduced separately from the work wind, thereby cooling the motor, so-called bypass type or tangential type. In the former type of blower motor, unless a certain amount of operation air is secured, there is a risk that the work air exhaust for cooling the motor is insufficient and the motor is heated. Therefore, when there is a possibility of operating the dust collector with a low air volume, the latter type of blower motor (referred to as “cooling air introduction type” in this specification) is often used.

  When using a blower motor of the cooling air introduction type, since the cooling air is taken in separately from the work air, there is no concern that the motor will be heated even if the continuous operation is performed with a low air volume. However, in this case, in order to prevent the motor from being affected by the heat of the work wind, it is necessary to provide a partition so that the work wind does not touch the motor. For this reason, when the cooling air introduction type blower motor is used, two types of exhaust air of cooling air exhaust and work air exhaust are generated, and are usually exhausted separately. Here, when the operation time of the dust collector becomes longer, there is a problem that the temperature of the work wind exhaust gradually rises and when the operator touches it, it feels hot and very uncomfortable.

  In order to solve such a problem, it is only necessary to lower the intake air temperature and the exhaust gas temperature of the dust collector. Various methods for cooling the intake air and exhaust gas of the dust collector are conventionally known.

  For example, the dust collector of Patent Document 1 includes a cooling unit that is provided in a path from the intake unit to the exhaust unit and cools the gas flowing through the path, and the cooling unit includes a heat collection unit and a heat dissipation unit. Has been. The heat collecting part is composed of a plurality of plate-like members (for example, aluminum plates having good thermal conductivity) that are long in the air flow direction, and the heat radiating part is connected to a radiator for cooling water or the like. As the liquid circulates inside, the heat transferred from the heat collecting part is radiated.

  Patent Document 2 discloses a method in which a spray cooling mechanism is provided in a duct connecting a combustion chamber and a dust collector, and spray water is sprayed on the exhaust gas by the spray cooling mechanism, thereby cooling the exhaust gas.

  However, each of the above methods requires a dedicated device for cooling the exhaust or intake air, and the device is of a complicated configuration. For this reason, these devices are expensive, and cannot be employed in small general-purpose dust collectors having a low unit price, for example.

JP 2006-167502 A JP 2009-162408 A

  This invention is made | formed in view of the above situation, The objective is to provide the dust collector which can cool work wind exhaust_gas | exhaustion cheaply with a simple structure.

  In order to achieve the above object, the present invention provides a dust collector using a cooling air introduction type blower motor, comprising a silencer for reducing exhaust noise, and cooling air exhaust and work wind in the silencer. Provided is a dust collector characterized in that exhaust air is taken in and the temperature of the work air exhaust is lowered by mixing the cooling air exhaust and the work air exhaust in the silencer. By adopting such a configuration, it is possible to cool the work-style exhaust gas at a low cost with a simple configuration. That is, providing the silencer with a function as a work wind cooling device eliminates the need for a device used only for cooling the work wind and, of course, also has a silencing effect, and is extremely economical.

  Further, the present invention may be a dust collector in which the silencer has a box shape and has one or more partition plates therein. With such a configuration, turbulent flow is generated in the work air exhaust and cooling air exhaust passing through the silencer, and the work air exhaust and cooling air exhaust can be mixed more effectively. The cooling efficiency can be increased. Moreover, since a duct bending sound absorption effect is produced by such a configuration, the noise reduction effect can be further enhanced.

  The present invention may also be a dust collector characterized in that the partition plate has a height of 50 to 90% of the height of the outer box forming the box shape. By adopting such a configuration, work air exhaust and cooling air exhaust can be mixed more efficiently, and the noise reduction effect can also be enhanced.

  Moreover, the present invention may be a dust collector characterized in that the number of the partition plates is 1 to 5. With such a configuration, since the resistance in the silencer does not become excessive, the flow of the cooling air exhaust can be appropriately maintained, and the blower motor can be efficiently cooled.

  Further, the present invention provides a dust collector characterized in that the control base is cooled by the cooling air by disposing the control base between the cooling air intake port for cooling the blower motor and the blower motor. Also good. By adopting such a configuration, there is no need to provide a dedicated fan or the like for cooling the control board, which is more economical.

  As described above, the present invention can reduce the temperature of work-style exhaust air with a simple structure at low cost and with high efficiency, and also exhibits a high noise reduction effect.

It is front sectional drawing of the dust collector of this invention.

  Hereinafter, a dust collector equipped with a silencer having a work wind exhaust cooling function according to the present invention will be described in detail with reference to FIG. As shown in FIG. 1, the dust collector of the present invention includes a dust collecting filter 2, a cooling air introduction type blower motor 3 composed of a motor part 3a and a fan part 3b, a control base 4 having radiating fins 4a, and the collector. It comprises a housing 1 that houses the dust filter 2, the blower motor 3, and the control base 4, and a silencer 9 that is fixed to the housing 1. The housing 1 houses a dust collecting filter 2, a work wind introduction chamber 5 into which work wind is introduced from a work wind introduction port 5 a, and a fan portion 3 a of a cooling air introduction type blower motor 3. A work air exhaust chamber 6 in which work air is exhausted from the exhaust port 6a, a motor part 3b of the cooling air introduction type blower motor 3, and a cooling air exhaust chamber 7 in which the cooling air is exhausted from the cooling air exhaust port 7a; The control board 4 is housed and partitioned by a partition into a cooling air introduction chamber 8 into which cooling air is introduced from a cooling air introduction port 8a.

  Next, the silencer 9 will be described. The silencer 9 includes an outer box 9a having a substantially rectangular parallelepiped shape, and a partition plate 9b that is suspended or erected in the inner space of the outer box 9a. The inner space of the outer box 9a is the work-style exhaust port. 6a and the cooling air exhaust port 7a are fixed to the housing 1 so as to communicate with the work air exhaust chamber 6 and the cooling air exhaust chamber 7, respectively.

  As shown in FIG. 1, the silencer 9 uses two partition plates 9b in this embodiment, but is not limited to this. For example, 1 to 5 partition plates may be used. it can. This is because if the number of partition plates is too large, the resistance when cooling air exhaust and work air exhaust passes through the silencer becomes excessive, and the blower motor cannot be cooled sufficiently. By setting it to -5 sheets, the blower motor can be sufficiently cooled while exhibiting a silencing effect. In addition, when using a plurality of partition plates 9b, each partition plate is vertically or vertically installed in the outer box 9a, and the partition plates that are vertically installed and the partition plates that are vertically installed are alternately arranged. (As shown in FIG. 1, in the present embodiment, the first partition plate is suspended and the second partition plate is erected).

  Further, the partition plate 9b of the present embodiment has the same width as the outer box 9a, and the height is 75% of the height of the outer box 9a. However, the height of the partition plate is not limited to this, and may be included in the range of 50 to 90% of the height of the outer box. By setting the height of the partition plate in this way, the silencer 9 can sufficiently perform mixing of the cooling air exhaust and the work air exhaust while exhibiting a sufficient silencing effect.

Furthermore, a sound absorbing material may be used for the silencer 9 of the present invention in order to further enhance the silencing effect. Here, as the sound absorbing material, commonly used materials such as glass wool and urethane foam can be used and are not particularly limited. In this embodiment, urethane foam having a thickness of 5 mm is adhered to the inner side of the outer box 9a and the partition plate 9b.

  Next, the operation of the dust collector of the present invention will be described. The dust collector of the present invention introduces dust-collected air containing dust, that is, work air, into the work air introduction chamber 5 from the suction pipe 10 through the work air introduction port 5 a by operating the blower motor 3. .

  When the work wind flowing into the work wind introduction chamber 5 passes through the dust collection filter 2, dust contained therein is collected by the dust collection filter 2 and becomes clean air. In this embodiment, a pleated filter is used as the dust collecting filter. The work air that has become clean air passes through the fan portion 3b of the blower motor 3, and is exhausted from the work air exhaust port 6a into the silencer 9a as work air exhaust. The work air exhaust chamber 6 that houses the fan portion 3b and the cooling air exhaust chamber 7 that houses the motor portion 3a are partitioned by a partition so that the work air exhaust does not touch the motor portion 3a of the blower motor 3. Thereby, it can prevent that the motor part 3a receives to the influence of the heat | fever of work style exhaust.

  On the other hand, cooling air for cooling the motor part 3a of the blower motor 3 is introduced from the outside of the dust collector through the cooling air introduction port 8a. The introduced cooling air passes through the control board 4 having the radiation fins 4a and is introduced into the motor unit 3a. After cooling the motor unit 3a, the cooling air is exhausted from the cooling air exhaust port 7a into the silencer 9a.

  In this embodiment, the control base 4 includes a base for controlling the blower motor 3, a base for controlling other functions of the dust collector, and a power supply unit. By disposing the control board 4 having the radiation fins 4a in the passage of the cooling air as in this embodiment, the control board 4 can be cooled by the cooling air for the blower motor. It is economical because it is not necessary to provide a device.

  The work wind exhaust and the cooling wind exhaust exhausted into the silencer 9 are mixed when passing through the silencer 9, thereby lowering the temperature of the work wind exhaust and exhausting it outside the dust collector. As described above, since the partition plate 9b is provided in the silencer 9 in the present embodiment, the silencing effect due to the duct bending sound absorption effect generated by bending the air flow, and the mixing generated by generating the turbulent flow by bending the air flow. An effect can be generated, and exhaust noise can be effectively reduced and work air exhaust and cooling air exhaust can be mixed.

  Below, the comparative data of a present Example and the dust collector (comparative example) which removed only the silencer 9 from the dust collector of a present Example are shown (Table 1 and Table 2). Table 1 shows comparison data regarding the exhaust temperature, and Table 2 shows comparison data regarding the noise value.

  The work air exhaust and the cooling air exhaust in Table 1 indicate the temperatures immediately after being exhausted from the blower motor, and “after passing through the silencer” in the example indicates the temperature at the outlet of the silencer. As can be seen from Table 1, in the embodiment, the work air exhausted at 65 ° C. is cooled to 45 ° C. after passing through the silencer, that is, when exhausted outside the dust collector. On the other hand, in the comparative example, the work air exhaust at 63 ° C. is exhausted as it is outside the dust collector. From this comparison data, it can be seen that the dust collector of the present invention can reliably cool the work wind exhaust.

  The noise value (dB) in Table 2 is obtained by measuring the noise value at a point 1 m away from the dust collector body. From Table 2, it can be seen that the noise value of this example is lower than that of the comparative example at all locations, and the dust collector of the present invention can reliably reduce the exhaust noise.

  As described above, the present invention has a simple configuration and can reduce the temperature of the work-style exhaust to such an extent that the operator does not feel uncomfortable, and can also reduce the exhaust noise, thereby improving the work environment. It contributes.

  While typical embodiments of the present invention have been described above, the present invention is not necessarily limited thereto, and various alternative embodiments can be made by those skilled in the art without departing from the scope of the appended claims. And it is possible to find modifications.

DESCRIPTION OF SYMBOLS 1 Housing 2 Filter for dust collection 3 Cooling air introduction type blower motor 4 Control board 5a Work air introduction port 6a Work air exhaust port 7a Cooling air exhaust port 8a Cooling air introduction port 9 Silencer 9b Partition plate

Claims (5)

A dust collector using a cooling air introduction type blower motor, comprising a silencer for reducing exhaust noise, taking in cooling air exhaust and work air exhaust into the silencer, and cooling air exhaust in the silencer A dust collector characterized in that the temperature of the work wind exhaust is lowered by mixing the work wind exhaust.   The dust collector according to claim 1, wherein the silencer has a box shape and has one or more partition plates therein.   The dust collector according to claim 2, wherein the height of the partition plate is 50 to 90% of the height of the outer box forming the box shape. The dust collector according to claim 2 or 3, wherein the number of the partition plates is 1 to 5. 5. The control board is cooled by the cooling air by disposing a control board between a cooling air intake port for cooling the blower motor and the blower motor. Dust collector.