JP4028872B2 - Exhaust device for motor assembly and vacuum cleaner including the same - Google Patents

Description

  The present invention relates to an exhaust device and a cleaner of a motor assembly, and more particularly to an exhaust device that exhausts air discharged from the motor assembly and a cleaner including the exhaust device.

  In general, a vacuum cleaner sucks external dust and debris into the dust collection chamber by the suction force generated by driving a drive motor installed in the drive chamber of the main body. High power motors with high RPM are used. As a result, a large noise is generated when the motor is driven. Therefore, the vacuum cleaner requires a sound insulation structure that blocks generated noise.

  FIG. 8 is a diagram showing the structure of a conventional vacuum cleaner, and shows the structure of the vacuum cleaner disclosed in Korean Patent Publication (Publication No. 1998-0775351).

  The schematic configuration is as follows. In the vacuum cleaner 200 including the dust collection chamber 203 in which the dust collection bag 201 is accommodated and the drive chamber 207 to which the drive motor 205 that provides suction force is mounted, the front of the drive motor 205 is interposed with a dustproof member 209 interposed therebetween. The front cover body 211 surrounding one side and one side are fixed to the front cover body 211, the first chamber 213 surrounding the rear of the drive motor 205, and the one side fixed to the first chamber 213 and outside the first chamber 213 The third chamber 217 is formed so as to have a predetermined separation space from the first chamber 213, and air is sent from the first chamber 213 through the first communication pipe 215, the first chamber 213, and The first chamber 213 is sandwiched between the third chambers 217 so as to maintain a predetermined distance from each chamber. Characterized in that it comprises a second chamber 223 having an exhaust hole 221 for discharging the third driving chamber 207 from the chamber 217 is transmitted to the air through the second communicating pipe 219 is isolated from.

  FIG. 9 is a view showing the structure of a conventional vacuum cleaner according to another embodiment, and shows the structure of the vacuum cleaner disclosed in Korean Patent Publication (Publication No. 10-2004-80092).

  If the schematic structure is seen, in order to reduce the noise which generate | occur | produces by the drive of the fan motor 241, the motor case body 230 which consists of the front case body 231 and the rear case body 233 is formed. The main purpose of the motor case body 230 is to reduce the noise of the cleaner 300 and is formed so as to completely surround the fan motor 241.

  As described above, the conventional vacuum cleaner adopts a form that surrounds the fan motor in order to reduce the noise. As an example, in Korean Patent Publication (Publication No. 1998-075301), the first to third In the Korean Patent Publication (publication number: 10-2004-80092), a configuration in which front and rear case bodies are provided is adopted.

  In this way, the member surrounding the fan motor is usually made of a flame retardant material polypropylene in consideration of sound insulation and fire safety.

  However, if polypropylene is used in this way, it is suitable from the viewpoint of fire safety, but there is a disadvantage that it does not reach the expected level from the aspect of noise reduction.

  The present invention has been made to solve the above-described problems, and a first object thereof is to improve the sound insulation effect by improving the material and structure of the housing surrounding the drive motor. An object of the present invention is to provide an exhaust device for an assembly.

  A second object of the present invention is to provide a vacuum cleaner in which the above-described exhaust device is applied to a vacuum cleaner and noise due to air flow is reduced.

In order to achieve the above-described object, an exhaust apparatus for a motor assembly according to the present invention generates a suction force and surrounds the motor assembly in which an air discharge port is formed, and is discharged from the air discharge port. A motor housing in which a discharge port through which air is discharged is formed, and a sound insulating plate made of a porous material provided on a discharge flow path formed by the motor housing, the motor housing being at least partially porous The sound insulating portion is made of a material, and is configured such that at least a part of the air discharged from the air discharge port passes through the sound insulating portion.

  Further, the sound insulation plate is made of low density porous plastic, the sound insulation portion is made of high density porous plastic, and the other part of the motor housing excluding the sound insulation portion is made of high strength plastic. It is more preferable to produce by. According to the present invention, it is possible to significantly reduce noise caused by the air discharged through the sound insulating portion and the sound insulating plate.

  As an example, the sound insulating plate may be provided at a discharge port of the motor housing on the discharge flow path.

  As another embodiment, the flow path is configured to include an internal flow path formed inside the motor housing and an external flow path formed outside, and the internal flow path is formed in a spiral shape. The motor assembly exhaust device of the present invention can be configured such that the air discharged from the air discharge port of the motor assembly is spirally discharged.

  Here, the motor housing preferably includes an inner channel wall and an outer channel wall that form the channel, and at least a part of the inner channel wall is formed of a porous material. Is made of a low-density porous material, the inner flow path wall of the motor housing is formed of a high-density porous material, and other parts of the motor housing excluding the inner flow path wall are made of high strength More preferably, it is made of plastic.

  An object of the present invention is to provide a brush assembly in which a vacuum cleaner body having a dust collection chamber and a motor chamber defined therein, and a suction port that communicates with the dust collection chamber and into which external air containing dust flows is formed. A solid body, a motor assembly that is provided in the motor chamber and generates suction force, and has an air discharge port; and a discharge port that surrounds the motor assembly and discharges air discharged from the air discharge port. A motor housing formed and a sound insulating plate made of a porous material provided on a discharge flow path formed by the motor housing, the motor housing comprising at least a part of a sound insulating portion made of a porous material, At least a part of the air discharged from the air discharge port is also achieved by a vacuum cleaner that passes through the sound insulating portion.

  Further, the sound insulating plate of the vacuum cleaner can be provided at the discharge port of the motor housing on the discharge flow path, and the sound insulating plate is made of low density porous plastic, and the sound insulating portion has a high density. The other part of the motor housing made of porous plastic and excluding the sound insulation part is preferably made of high-strength plastic.

  The motor housing, the sound insulation plate, and the sound insulation portion are preferably made of a flame retardant material.

  The exhaust device according to the present invention described above has the advantage that the sound insulation effect is maximized by forming the motor housing from a porous material and providing a sound insulation plate made of a porous material on the flow path.

  Moreover, the flow noise by the air discharged | emitted from the motor chamber of a cleaner can be reduced efficiently.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. An exhaust device for a motor assembly that generates a suction force can be used not only for a vacuum cleaner but also for various devices that require a suction force. However, in the following, for convenience of explanation, a vacuum cleaner to which a motor assembly exhaust device is applied will be described as a representative example.

  FIG. 1 is a perspective view schematically showing a cleaner according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view schematically showing a configuration of an exhaust device applied to the cleaner shown in FIG. FIG. 3 is a partially cutaway perspective view showing the structure of the exhaust device for a vacuum cleaner according to an embodiment of the present invention with a partially cutaway view.

  In this embodiment, a canister type vacuum cleaner is described. However, the exhaust device and the vacuum cleaner of the motor assembly of the present invention are not limited to a canister type, but various types such as an upright type vacuum cleaner and a stick type vacuum cleaner. It can be applied to a type of vacuum cleaner.

  Referring to FIGS. 1 to 3, the cleaner 20 includes a cleaner body 28, a brush assembly 22, a motor assembly exhaust device 29, an extension tube 24, and a flexible hose 26.

  The cleaner body 28 has a dust collection chamber 1 and a motor chamber 3, and an exhaust port 5 through which air is discharged is provided on the rear side. The brush assembly 22 communicates with the dust collecting chamber 1 of the cleaner body 28 via the extension pipe 24 and the flexible hose 26, and a suction port (not shown) for sucking external air containing dust is formed. ing.

  The exhaust device 29 of the motor assembly 30 includes a motor assembly 30, a motor housing 50, and a sound insulating plate 61. The motor assembly 30 is provided inside the motor chamber 3, the motor housing 50 surrounds the motor assembly 30, and the sound insulating plate 61 is provided on the discharge flow path P.

  The motor assembly 30 includes an impeller 31, generates power for rotating the impeller 31 to evacuate, an air suction port 35a is formed on the tip side, and an air suction port 35a is formed on the rear side surface. Is formed. The impeller 31 is an axial flow type impeller in which a fluid mainly flows in the direction of the drive shaft 36.

The motor housing 50 has a shape substantially corresponding to the appearance of the motor housing 30, is formed larger than the motor assembly 30, and has a flow path P that guides the air discharged from the air discharge port 35b of the motor assembly 30 to the outside of the cleaner. Form. The discharge channel P is divided into an internal channel P1 and an external channel P2. Further, the internal flow path P1 and the external flow path P2 are communicated, and a discharge port 51 forming a part of the flow path P is formed in the lower part of the motor housing 50 along the rotation direction of the drive shaft 36.

  Furthermore, a sound insulating plate 61 is provided along the discharge port 51 and on the external flow path P2 formed between the outer surface of the motor housing 50 and the cleaner body 10. Here, the sound insulating plate 61 is made of a porous material and allows air to pass therethrough. When the air passes through the sound insulating plate 61 made of a porous material, the flow length of the air becomes long, and as a result, there is an effect that noise is reduced. For example, a plastic material may be used as the porous material, and a low-density porous plastic material may be used.

  A sound insulation portion 53 made of a porous material is formed on the upper portion of the motor housing 50 in the direction opposite to the portion where the discharge port 51 is formed. A part of the air discharged from the discharge port 35b of the motor assembly 30 is discharged to the sound insulating portion 53 made of a porous material, so that even if the discharged air flowing through the discharge flow path P is somewhat stagnated by the sound insulating plate 61. The overall amount of exhaust air can be easily maintained. Referring to FIG. 2, air is exhausted along the solid arrow (A direction) through the sound insulation plate 61, and the remaining air that could not be exhausted through the sound insulation plate 61 is along the broken arrow (B direction). Part of the air is exhausted through the sound insulation part 53.

  At this time, the sound insulation part 53 is preferably made of a porous plastic material having a higher density than the sound insulation plate 61. In addition, it is preferable that the amount of air exhausted through the discharge port 51 and the sound insulation unit 53 is substantially the same.

  Here, the entire motor housing 50 can be made of a porous plastic material. However, since the porous plastic has a relatively very weak strength, a part of the motor housing 50 as shown in FIG. It is preferable to provide a sound insulating portion 53 made of only a porous material, and the remaining portion is made of a high-strength plastic such as polypropylene.

  In other words, the porous plastic is obtained by uniformly mixing a fine powder of magnesium and iron and high-density polyethylene, and then manufacturing this into a porous form.

  In the configuration described above, it is preferable that the sound insulating plate 61, the sound insulating portion 53, and the motor housing 50 use a flame retardant material in preparation for overheating of the drive motor 33.

  FIG. 4 is a cross-sectional view schematically showing the configuration of the exhaust device 29 ′ of the motor assembly 30 according to another embodiment of the present invention, and the entire flow comprising the internal flow path P1 ′ and the external flow path P2 ′. The internal flow path P1 ′ of the motor housing 100 in the path P ′ is formed in a spiral shape. FIG. 5 is an overall perspective view showing the configuration of the exhaust device applied to FIG.

  4 and 5, the motor chamber 3 is provided with a motor assembly 30 and a motor housing 100 that protects the motor assembly 30. Here, the motor assembly 30 has the same structure as that shown in FIGS. 2 and 3. Therefore, the same reference numerals are given to the same parts as those shown in FIGS. 2 and 3, and details thereof are omitted. . 2, 3 and FIGS. 4 and 5 are different from each other in a motor housing 100 which guides the air discharged from the air discharge port 35b in a spiral shape and discharges it to the outside.

  The motor housing 100 includes an upper casing 110 and a lower casing 130. Inside the upper and lower casings 110 and 130, an impeller 31 and an impeller accommodating chambers 111 and 131 of the motor assembly 30 and a motor accommodating chamber 113 and 133 are defined.

  The front and rear support portions of the lower casing 130 of the motor housing 100 are provided with interval holding portions 136 a and 136 b that hold a predetermined interval H from the bottom of the cleaner body 10, and are exhausted through the motor housing 100. Air passes through the exhaust port 5 provided on the rear side of the main body 10.

  6 is a cross-sectional view taken along line I-I ′ of FIG. 5, and FIG. 7 is a partially cut-away cross-sectional view showing a part of the side where the impeller of FIG. 4 is provided.

  Referring to FIGS. 6 and 7, the motor housing 100 includes the partition walls 115, 117, and the spiral inner flow path P 1 ′ so that the air discharged through the air discharge port 35 b of the motor assembly 30 is guided spirally. 135. At this time, a sound insulating plate 150 is provided between the channel partition walls 115 and 117 so as to be substantially upright with respect to the channel partition walls 115 and 117. The sound insulating plate 150 is made of low density porous plastic.

  On the other hand, in order to compensate for the shortage of the exhaust area due to the provision of the sound insulating plate 150 on the internal flow path P1 ′, the inner flow path wall 115 adjacent to the motor assembly 30 (see FIG. 4) has a high-density porosity. Made of plastic material.

  With such a configuration, the air discharged from the air discharge port 35b of the motor assembly 30 is guided through the flow path partition walls 115, 117, and 135, flows in a spiral shape (in the direction of arrow D), and passes through the sound insulation plate 150. Noise is reduced. On the other hand, if the internal pressure of the motor housing 100 increases due to a lack of exhaust area due to the sound insulation plate 150, the remaining air that could not pass through the sound insulation plate 150 from the high-density porous flow path partition 115 in the direction of arrow E. Will be discharged along.

  The remaining part of the motor housing 100 excluding the inner flow path partition 115 is made of a high-strength plastic such as a polypropylene material in order to maintain strength.

  Similarly, the motor housing 100 that forms the flow path partition walls 115, 117, and 135 including the above-described sound insulating plate 150 is also preferably made of a flame-retardant material in preparation for an overheated state due to high-speed rotation of the drive motor 33.

It is a perspective view which shows roughly the external appearance of the cleaner of this invention. It is sectional drawing which shows schematically the structure regarding the exhaust apparatus of the motor housing by one Example of this invention. 1 is a partially cutaway perspective view showing a partially cutaway configuration of a vacuum cleaner exhaust apparatus according to an embodiment of the present invention. FIG. 6 is a vertical sectional view schematically showing the configuration of an exhaust device for a vacuum cleaner according to another embodiment of the present invention, and showing the configuration of the exhaust device of the vacuum cleaner to which a motor housing having a spiral channel structure is applied. It is. FIG. 5 is an overall perspective view showing a configuration of an exhaust device applied to FIG. 4. FIG. 6 is a cross-sectional view taken along the line I-I ′ of FIG. 5. FIG. 5 is a partially cut-away sectional view showing a part of a portion where the impeller of FIG. 4 is provided. It is the figure which showed the structure of the conventional vacuum cleaner, Comprising: The structure of the vacuum cleaner disclosed by the Korean patent publication | presentation gazette (publication number patent number 1998-0775351) is shown. It is the figure which showed the structure of the vacuum cleaner by other examples of the past, Comprising: The structure of the vacuum cleaner disclosed by the Korean patent publication gazette (publication number 10-2004-80092) is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust collection chamber 3 Drive chamber 5 Exhaust port 10 Main body 30 Motor assembly 31 Impeller 33 Drive motor 35 Motor housing 35a Air suction port 35b Air discharge port 50, 100 Motor housing 51 Discharge port 53 Sound insulation part 61, 150 Sound insulation plate 115 Inside Channel partition 117, 135 Channel partition

Claims (12)

A motor assembly that generates a suction force and has an air outlet;
Enclosure the motor assembly, and the air discharge opening from the motor housing outlet air is discharged is formed to be discharged, and sound insulation plate of a porous material provided in the discharge flow path formed by the motor housing Including
An exhaust apparatus for a motor assembly , wherein the motor housing is at least partly composed of a sound insulation part made of a porous material, and at least part of the air discharged from the air discharge port passes through the sound insulation part . The sound insulation plate is made of low density porous plastic, the sound insulation part is made of high density porous plastic, and the other parts of the motor housing except the sound insulation part are made of high strength plastic. The exhaust device for a motor assembly according to claim 1 , wherein the exhaust device is a motor assembly. 3. The motor assembly exhaust device according to claim 2 , wherein an air amount passing through the sound insulating plate and an air amount passing through the sound insulating portion are substantially the same. The exhaust device for a motor assembly according to claim 1 , wherein the sound insulating plate is provided at a discharge port of the motor housing on the discharge flow path. The sound insulation plate is made of low density porous plastic, the sound insulation part is made of high density porous plastic, and the other parts of the motor housing except the sound insulation part are made of high strength plastic. The exhaust apparatus for a motor assembly according to claim 4 , wherein the exhaust apparatus is a motor assembly. The flow path includes an internal flow path formed inside the motor housing and an external flow path formed outside, and the internal flow path is formed in a spiral shape and is discharged from an air discharge port of the motor assembly. The motor assembly exhaust device according to claim 1 , wherein the air to be discharged is spirally discharged. The motor housing, according to claim 6 which includes an inner channel wall and the outer channel wall, at least a portion of the inner channel wall, characterized in that it is formed of a porous material that forms the flow path Motor assembly exhaust system. The sound insulating plate is made of a low-density porous material, the inner flow path wall of the motor housing is formed of a high-density porous material, and other parts of the motor housing excluding the inner flow path wall are The exhaust device for a motor assembly according to claim 7 , wherein the exhaust device is made of high-strength plastic. A vacuum cleaner body in which a dust collection chamber and a motor chamber are defined;
A brush assembly that communicates with the dust collection chamber and has a suction port through which external air containing dust flows; and
A motor assembly that is provided in the motor chamber to generate a suction force and is provided with an air discharge port;
A motor housing that surrounds the motor assembly and has a discharge port for discharging air discharged from the air discharge port; and a sound insulating plate made of a porous material provided on a discharge flow path formed by the motor housing; ,
Including
The motor housing includes at least a part made of a sound insulating part made of a porous material, and at least a part of the air discharged from the air discharge port passes through the sound insulating part. The vacuum cleaner according to claim 9 , wherein the sound insulating plate is provided at a discharge port of the motor housing on the discharge flow path. The sound insulation plate is made of low density porous plastic, the sound insulation part is made of high density porous plastic, and the other parts of the motor housing except the sound insulation part are made of high strength plastic. The vacuum cleaner according to claim 9 or 10 , wherein the vacuum cleaner is provided. The vacuum cleaner according to claim 11 , wherein the amount of air passing through the sound insulating plate and the amount of air passing through the sound insulating portion are substantially the same.

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