JP2019205536A - mixer - Google Patents

Abstract

To provide a mixer capable of decreasing noise while including a cooling structure with a cooling fan.SOLUTION: A mixer 1 includes: a body part 20 which has a motor 22 having a driving shaft 22d, a motor case 23 storing the motor 22, a body case 21 storing the motor case 23, and a cooling fan 26 attached to the driving shaft 22d in the motor case 23; and a container part 10 which is connected to the body part 20. The body part 20 is formed with an air intake path IR for taking air from the outer part of the body part 20 to the motor case 23, and an exhaust air path ER for exhausting air from the motor case 23 to the outer part of the body part 20, and there is provided a partition wall part 24a for sectioning the exhaust air path ER into at least two or more partial exhaust air paths, and formed with an exhaust air hole 24f as a communication hole for communicating the first exhaust air path ER1 and the second exhaust air path ER2.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a technique of a mixer, and more particularly to a structure for reducing the noise of a mixer.

  In recent years, with the change of lifestyle and housing environment, there is an increasing need for noise reduction of home appliances. The cooking mixer used at home is a device that rotates the cutter blade placed in the cup by the rotational force of the motor and crushes the ingredients etc. put in the cup. Various sounds are generated, such as noise, fan wind noise for cooling the motor, and impact sound between the food and the cup.

  A conventional mixer employs a configuration in which air is introduced into a housing containing a motor by a cooling fan to cool the motor, and a configuration in which intake and exhaust holes are formed in the housing is common. is there. An example of a mixer having a cooling structure with a cooling fan is disclosed in Patent Document 1. From the exhaust hole, motor operation noise, cooling fan wind noise, and the like leak to the outside along with exhaust, so the noise generated by the mixer during operation is higher than that of other home appliances.

Japanese Utility Model Publication No. 50-59381

  The present invention has been made in view of such a current problem, and an object of the present invention is to provide a mixer that is quiet while having a cooling structure with a cooling fan.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the mixer according to the present invention includes a motor having a rotation shaft, a motor case that houses the motor, a main body case that houses the motor case, and a cooling fan attached to the rotation shaft in the motor case. A main body part, and a container part connected to the main body part, wherein the main body part includes an intake path for taking air into the motor case from the outside of the main body part, and the motor case. A mixer in which an exhaust path for exhausting air to the outside of the main body is formed, the exhaust path being divided into at least two partial exhaust paths, and further, the two or more partial sections A partition wall having a communication hole for communicating a simple exhaust path is provided.

  Moreover, the mixer which concerns on this invention WHEREIN: The said partial exhaust passage adjacent to each other divided by the said partition part is adjacent to the rotation radial direction of the said rotating shaft.

  In the mixer according to the present invention, an elastic member is interposed between the motor case and the partition wall.

  Moreover, the mixer which concerns on this invention WHEREIN: The said elastic member comprises a part of said exhaust path.

  In the mixer according to the present invention, the motor case includes a cylindrical cylindrical portion, a bottom portion fitted to one end portion in the cylindrical axial direction of the cylindrical portion, and the other end portion in the cylindrical axial direction of the cylindrical portion. And a lid portion fitted on the outer side.

  In the mixer according to the present invention, the opening direction of the exhaust hole, which is an opening to the outside of the main body portion of the exhaust path, is inclined with respect to the axial direction of the rotating shaft and the direction orthogonal to the axial direction. Is.

  As effects of the present invention, the following effects can be obtained.

  According to the mixer of the present invention, in a mixer having a cooling structure with a cooling fan, the exhaust path in the apparatus is made longer and the number of places where the flow direction changes in the exhaust path is further increased, so that air vibrations in the exhaust path By increasing the attenuation amount of the sound propagated by the noise, the noise emitted from the mixer can be reduced.

  Moreover, according to the mixer which concerns on this invention, the exhaust path in an apparatus can be made longer.

  Further, according to the mixer of the present invention, the elastic member absorbs the vibration of the motor case, which is a cause of sound generation, and the air exhausted from the motor case collides with the elastic member, so that the sound propagated by the air vibration is generated. By attenuating, the noise emitted from the mixer can be further reduced.

  Moreover, according to the mixer which concerns on this invention, noise reduction can be achieved, maintaining an apparatus compact by reducing a noise using an exhaust_gas | exhaustion path | route.

  Moreover, according to the mixer which concerns on this invention, the rigidity of a motor case is improved and a noise can be reduced more by reducing the vibration of a motor case.

  Further, according to the mixer according to the present invention, the sound emitted from the exhaust hole is suppressed from being amplified by reflection with the installation surface of the mixer, and the sound emitted from the exhaust hole is prevented from directly reaching the user. can do.

The front view which shows the whole structure of the mixer which concerns on one Embodiment of this invention. 1 is a front cross-sectional view showing the overall configuration of a mixer according to an embodiment of the present invention. The bottom view which shows the whole structure of the mixer which concerns on one Embodiment of this invention. The perspective assembly drawing of a main-body part. The front view assembly drawing of a main-body part. Side surface explanatory drawing of the intake path and exhaust path in a main-body part. Explanatory drawing of the bottom face of the intake path and exhaust path in a main-body part.

  Next, embodiments of the invention will be described. In the following description, the vertical direction of the mixer is defined as indicated by arrows in FIGS. 1, 3, 4, 5, and 6.

(Overall structure of the mixer)
A mixer 1 shown in FIGS. 1 to 3 is an embodiment of the mixer according to the present invention, and includes a container portion 10 and a main body portion 20.
The container part 10 is a container-like part that can contain a cooked product (foodstuffs such as fruits and vegetables) by the mixer 1, and is disposed above the main body part 20.
The main body 20 is a part that detachably supports the container part 10 and is a part that serves as a means for driving the container part 10 and is used in a state of being arranged on a horizontal surface such as a tabletop.

(Container part)
As shown in FIGS. 1 and 2, the container part 10 includes a cup 11, a container base 12, and a blade part 13.
The cup 11 is a cup-shaped part that can accommodate a cooked product, and includes a side peripheral part 11a that is a substantially cylindrical part and a bottom part 11b that continues from the lower end of the side peripheral part 11a. The cup 11 has a hole 11c formed at the center of the substantially circular bottom 11b in plan view. Further, on the inner surface of the side peripheral portion 11a of the cup 11, a rib portion 11d that is a convex portion that protrudes inward in the radial direction of the cup 11 from the bottom portion 11b to the side peripheral portion 11a is formed. The rib portion 11d has a shape in which the height and width from the inner surface of the side circumferential portion 11a are reduced as the distance from the bottom portion 11b increases. Further, the formation direction of the rib portion 11d is inclined with respect to the axis of the cup 11 in a side view. Furthermore, the cup 11 is provided with a handle portion 11e protruding from the outer peripheral surface, and an upper end opening for feeding the food is configured to be opened and closed by a lid portion 11f.

  The container base 12 is a part for connecting the container part 10 to the main body part 20 and has a substantially cylindrical outer shape. Inside the cylinder, a support part 12a having a support surface perpendicular to the axial direction is provided. Is formed. In addition, the container base 12 has a hole 12b formed at the center of a substantially circular support portion 12a in plan view.

  The blade portion 13 includes a cutter blade 14, a bearing case 15, a driven shaft 16, and an upper coupling 17. The blade portion 13 is a portion that rotatably supports the cutter blade 14 that rotates inside the cup 11.

  The bearing case 15 is a portion that rotatably supports the driven shaft 16 and is formed on a substantially cylindrical base portion 15a corresponding to the inner diameter of the hole portion 11c of the cup 11 and the central axis of the base portion 15a. Further, a substantially cylindrical bearing portion 15b and a flange portion 15c projecting radially outward from the base portion 15a are provided.

  The driven shaft 16 is rotatably supported on the central axis of the bearing case 15 via the bearing member 15d in the bearing portion 15b. A cutter blade 14 is fixed to the upper end portion of the driven shaft 16, and an upper coupling 17 is fixed to the lower end portion of the driven shaft 16.

  A female screw 12c corresponding to the male screw 11g formed at the lower end of the cup 11 is formed on the inner periphery of the upper end of the container base 12, and the female screw 12c and the male screw 11g are screwed together so that the cup 11 and the container stand 12 can be integrated. On the support portion 12a of the container base 12, an upward convex positioning portion 12d for positioning the blade portion 13 is formed.

  When the cup 11 and the container base 12 are screwed together, the blade part 13 is positioned and positioned on the support part 12a of the container base 12 by the positioning part 12d, and the base part 15a of the bearing case 15 is placed in the cup. 11, the flange portion 15 c is narrowed by the bottom portion 11 b and the support portion 12 a of the cup 11. Thereby, the cup 11, the container stand 12, and the blade part 13 are integrated. A packing 18 is interposed between the cup 11 and the blade portion 13.

(Main body)
As shown in FIGS. 1 to 5, the main body portion 20 is a portion that supports the container portion 10 from below, and includes a drive mechanism that drives the blade portion 13 of the container portion 10. A motor 22, a motor case 23, and a muffler case 24 are provided.

  The main body case 21 is a hollow cylindrical housing that constitutes the outer shell of the main body portion 20, the upper end portion 21a is sealed in a lid shape, and the lower end portion 21b is open. A plurality of claw-shaped positioning portions 21c protruding upward are formed on the upper end portion 21a. A hole 21d is formed on the cylindrical axis of the upper end 21a. The main body case 21 has a space in which the motor case 23 and the muffler case 24 can be accommodated. The main body case 21 includes a layer made of a sound absorbing material in the outer shell. As the sound absorbing material, for example, a material made of a metal mesh layer such as aluminum and having a large number of bubble portions in the layer can be used.

  The motor 22 is a drive source that drives the blade portion 13 of the container portion 10, and a core 22b, a rotor 22c, a drive shaft 22d, and the like are assembled to the motor bracket 22a. The motor 22 is a so-called double-axis motor, and a drive shaft 22d protrudes on both sides in the axial direction across the core 22b and the rotor 22c. The motor 22 is supplied with power by inserting a plug 40 into a household outlet (not shown), and by operating a switch 41 disposed on the outer peripheral surface of the main body 20, the motor 22 is turned on and off and mode selection ( The rotation speed can be changed). The wiring of the plug 40 connected to the motor 22 is configured to be wound and unwound by a reel (not shown) disposed in the main body case 21.

  A lower coupling 25 is fixed to the upper end of the drive shaft 22d of the motor 22. The lower coupling 25 is a member that is engaged with the upper coupling 17 of the blade portion 13. A cooling fan 26 for cooling the motor 22 is fixed to the lower end of the drive shaft 22 d of the motor 22.

  The motor 22 and the cooling fan 26 are accommodated in the motor case 23. The motor 22 is housed inside the main body case 21 in a state where the motor case 23 is housed in the muffling case 24.

  The motor case 23 is a hollow cylindrical casing that covers the motor 22, and includes a cylindrical portion 23a, a bottom portion 23b, and a lid portion 23c. An intake hole 23d is formed on the center of the bottom 23b that is substantially circular in plan view. That is, in the motor case 23, the upper end portion of the cylindrical portion 23a is sealed by the lid portion 23c, and the lower end portion of the cylindrical portion 23a is opened by an intake hole 23d formed in the bottom portion 23b.

That is, the motor case 23 in the mixer 1 is externally attached to the cylindrical portion 23a having a cylindrical shape, a bottom portion 23b fitted to one end portion in the cylindrical axis direction of the cylindrical portion 23a, and the other end portion in the cylindrical axis direction of the cylindrical portion 23a. And a lid portion 23c to be fitted. According to such a configuration, the rigidity of the motor case 23 is improved, and the noise emitted from the mixer 1 can be further reduced by reducing the vibration of the motor case 23.
A plurality of exhaust holes 23f penetrating in the radial direction are formed in a fitting portion between the cylindrical portion 23a and the lid portion 23c. The interior and the exterior of the motor case 23 communicate with each other through the exhaust hole 23f.

  The motor 22 is suspended inside the motor case 23 by fixing the motor bracket 22a to the lid portion 23c of the motor case 23 with screws. The motor 22 is disposed in the motor case 23 in a posture in which the axis of the drive shaft 22d is aligned with the cylinder axis of the cylindrical portion 23a.

  The muffler case 24 is a hollow cylindrical housing that can accommodate the motor case 23, and a support that constitutes a cylindrical partition wall portion 24a and a support surface perpendicular to the cylindrical axis of the partition wall portion 24a in the partition wall portion 24a. A portion 24b is provided. Moreover, the muffling case 24 includes a folded portion 24c that is a portion where the lower end portion is folded substantially outward. The folded portion 24 c is in contact with the lower end portion 21 b of the main body case 21 disposed so as to cover the muffling case 24, and constitutes an outer shell of the main body portion 20 together with the main body case 21. An exhaust hole 27 that communicates the inside and the outside of the main body case 21 is formed in the folded portion 24c. The exhaust holes 27 are long hole-shaped holes, and a plurality (12 in this embodiment) are formed at equal intervals in the circumferential direction. In addition, the support portion 24b of the silencer case 24 is formed with intake holes 24d and 24e penetrating in the cylindrical axis direction. The air intake hole 24d is a circular hole portion formed at the center of the support portion 24b that is circular in plan view, and the air intake holes 24e are elongated hole portions formed at regular intervals around the air intake hole 24d. It is.

  The motor case 23 and the muffling case 24 are both hollow cylindrical, and the muffling case 24 has a size that is slightly larger than the motor case 23 so that the motor case 23 can be inserted into the muffling case 24. It is configured. The motor case 23 is disposed in the sound deadening case 24 so that the axial end surface on the bottom 23b side faces the support 24b of the sound deadening case 24, and between the bottom 23b and the support 24b, A spring member 28 is interposed for absorbing vibration. By adopting a structure in which the motor case 23 is supported via an elastic body (spring member 28), the drive shaft 22d of the motor 22 and the driven shaft 16 of the blade portion 13 can be aligned, and the drive shaft 22d and the driven shaft are driven. Generation of vibration due to the misalignment of the shaft 16 can be suppressed. Since such vibration also causes noise generation, the generation of noise from the motor case 23 can be suppressed by suppressing the generation of vibration.

  A concave portion 23e is formed in the circumferential direction on the outer peripheral portion of the motor case 23, and an O-ring 29 is fitted into the concave portion 23e. The motor case 23 is inserted into the muffling case 24, and an O-ring 29 that is an elastic member is interposed between the motor case 23 and the muffling case 24. In the present embodiment, the configuration in which the O-ring 29 is interposed between the motor case 23 and the muffling case 24 is exemplified as the elastic member, but a configuration using another form of elastic member may be used. A rubber member may be wound, or a gap may be filled with a sponge member. Furthermore, in the present embodiment, the configuration in which the O-ring 29 is disposed in the upper space between the motor case 23 and the muffling case 24 is exemplified. However, the arrangement position of the elastic member blocks the exhaust (completely sealed). It may be a place that does not stop), and may be arranged in a plurality of places.

  Further, the main body portion 20 includes a hood portion 30 below the silencer case 24. On the side surface of the hood portion 30, there is formed a notch portion 20 a that is an opening portion for drawing air into the hood portion 30 and an opening portion for inserting and removing the plug 40 and its wiring. The main body 20 includes a plurality of leg portions 31 at the lower end of the hood portion 30.

(Intake route)
As shown in FIGS. 6 and 7, the mixer 1 is configured such that air can be introduced into the hood portion 30 from a cutout portion 30 a formed on the side surface of the hood portion 30. In addition, a gap substantially equal to the height of the leg portion 31 is secured at the lower end of the main body portion 20 between the installation surface of the main body portion 20 and the hood portion 30, and the hood portion 30 also has a clearance from this gap. Air can be introduced into the interior space. The space in the hood portion 30 serving as the intake path IR communicates with the intake holes 24d and 24e formed in the support portion 24b of the silencer case 24, and the hood portion is caused by the action of negative pressure generated below the cooling fan 26. Air can be sucked into the sound deadening case 24 from the inside through the air intake holes 24d and 24e.

  In the main body 20, the air introduced into the muffler case 24 through the intake holes 24 d and 24 e by the cooling fan 26 is further introduced into the motor case 23 through the intake holes 23 d formed in the bottom 23 b. That is, the main body portion 20 includes an intake path IR that extends from the gap at the lower end of the hood portion 30 to the inside of the motor case 23 through the intake holes 24 d and 24 e and the intake holes 23 d. Note that the diameter of the air intake hole 23d of the motor case 23 is preferably larger than the half of the fan outer diameter of the cooling fan 26.

(Exhaust route)
The air introduced into the motor case 23 is exhausted from the plurality of exhaust holes 23 f formed in the upper portion of the cylindrical portion 23 a and the lid portion 23 c by the action of positive pressure generated above the cooling fan 26, and the muffler case 24. Is introduced into the space between the motor case 23 and the motor case 23. The air introduced from the lower intake hole 23d of the motor case 23 flows around the motor 22 that is a heat generating element from the lower side to the upper side and is exhausted from the exhaust hole 23f without stagnation, thereby efficiently cooling the motor 22. It is used for that.

  The air introduced into the silencer case 24 is exhausted from the plurality of exhaust holes 24 f formed below the silencer case 24 by the action of the cooling fan 26, and enters the space between the main body case 21 and the silencer case 24. It is introduced and finally exhausted from the exhaust hole 27 to the outside of the main body 20. That is, the main body portion 20 includes an exhaust path ER that extends from the inside of the motor case 23 to the outside of the main body case 21 through the exhaust holes 23f, the exhaust holes 24f, and the exhaust holes 27.

  Here, in the main body part 20, the exhaust path ER is divided into at least two partial exhaust paths ER by the partition wall part 24 a of the silencer case 24. In the present embodiment, the exhaust path ER is divided into two sections by the partition wall 24a, a first exhaust path ER1 that is a part of the exhaust path ER and a second exhaust path ER2 that is also a part of the exhaust path ER. The first exhaust path ER1 and the second exhaust path ER2 are configured to communicate with each other through the exhaust hole 24f serving as a communication hole. The first exhaust path ER1 is an exhaust path ER using a space formed between the motor case 23 and the muffler case 24, and is a path from the exhaust hole 23f to the exhaust hole 24f. The second exhaust path ER2 is an exhaust path ER that uses a space formed between the muffling case 24 and the main body case 21, and is a path from the exhaust hole 24f to the exhaust hole 27.

  Here, the first exhaust path ER1 and the second exhaust path ER2 shown in the present embodiment are adjacent to each other across the partition wall 24a, and are adjacent to each other in the rotational radius direction of the drive shaft 22d. In the configuration in which the first exhaust path ER1 and the second exhaust path ER2 are adjacent to each other in the rotational radius direction of the drive shaft 22d with the partition wall 24a interposed therebetween, the lengths of the first exhaust path ER1 and the second exhaust path ER2 are as follows. The axial length of the motor case 23 can be easily secured.

  The first exhaust path ER1 and the second exhaust path ER2 may be configured such that the exhaust path ER is adjacent in the axial direction of the drive shaft 22d, but in order to ensure a longer exhaust path ER, the first exhaust path ER It is advantageous to make ER1 and the second exhaust path ER2 adjacent to each other in the rotational radius direction of the drive shaft 22d.

  In the exhaust path ER, the air exhausted from the exhaust hole 23f flows along the first exhaust path ER1, reaches the exhaust hole 24f, and the air exhausted from the exhaust hole 24f flows along the second exhaust path ER2, Finally, the air is exhausted from the exhaust hole 27. If the partition wall 24a does not exist in the main body 20, the air exhausted from the exhaust hole 23f flows downward in the space between the motor case 23 and the main body case 21, and is smoothly exhausted from the exhaust hole 27 as it is. Thus, the length of the exhaust path ER is substantially equal to that of the first exhaust path ER1. In the main body 20, the exhaust path ER is divided into a first exhaust path ER1 and a second exhaust path ER2, so that a longer exhaust path ER is generally secured by the length of the first exhaust path ER1.

  The air exhausted from the exhaust hole 24f flows in a substantially upward and downward direction, and the air that flows substantially upward from the exhaust hole 24f in the main body case 21 finally flows after bypassing the upper space in the main body case 21. Therefore, the air is exhausted from the exhaust hole 27. For this reason, in the main body 20, the amount of sound attenuation in the middle of the exhaust path ER is increased by increasing the length of the exhaust path ER.

  That is, the mixer 1 according to one embodiment of the present invention includes a motor 22 having a drive shaft 22d that is a rotating shaft, a motor case 23 that houses the motor 22, a main body case 21 that houses the motor case 23, and a motor case. 23, a main body 20 having a cooling fan 26 attached to the drive shaft 22 d in the main body 23, and a container 10 connected to the main body 20. In the main body 20, a motor is provided from outside the main body 20. An intake path IR for sucking air into the case 23 and an exhaust path ER for exhausting air from the motor case 23 to the outside of the main body 20 are formed, and at least two exhaust paths ER are formed. It is a communication hole that divides the above-described partial exhaust paths and further connects the first exhaust path ER1 and the second exhaust path ER2, which are two or more partial exhaust paths ER. Those with a partition wall 24a pores 24f is formed. According to such a configuration, in the mixer 1 having the cooling structure by the cooling fan 26, the noise propagation path in the main body 20 can be made longer, and the noise can be reduced by attenuating the noise. it can. In the present embodiment, the case where the exhaust path ER is divided into two sections of the first exhaust path ER1 and the second exhaust path ER2 by the partition wall 24a is illustrated, but for example, the sound deadening case 24 and the main body case 21 are divided. A partition wall may be further added between the two and the exhaust path ER may be divided into three or more sections.

  In the mixer 1, the first exhaust path ER1 and the second exhaust path ER2, which are partial exhaust paths ER adjacent to each other divided by the partition wall 24a, are adjacent to each other in the rotational radius direction of the drive shaft 22d. . According to such a configuration, the exhaust path ER can be made longer, and thereby noise emitted from the mixer 1 can be further attenuated.

  Further, when the air exhausted from the main body 20 passes through the exhaust hole 23f, the exhaust hole 24f, and the exhaust hole 27 in the exhaust path ER, the flow direction is changed at least three times. The sound propagated by the air vibration is attenuated when the air flow direction is changed and collides with the wall surface. The main body 20 is configured to change the direction in which the sound advances by changing the arrangement of the exhaust holes 23f, 24f, and 27 in the axial direction so that the frequency of collision with the wall surface is increased. It is possible to further reduce the sound. Further, the exhaust holes 23f, 24f, and 27 may be arranged at positions where the phases around the axes are different, so that the direction in which the sound travels is changed more times.

  In the main body 20, an O-ring 29 that is an elastic member is disposed inside the first exhaust path ER <b> 1, and a part of the first exhaust path ER <b> 1 is configured by the O-ring 29. For this reason, in the main body 20, a part of the air flowing through the first exhaust path ER <b> 1 can be brought into contact with the O-ring 29, and the sound propagated by the air vibration and the vibration generated by the rotation of the motor 22 are The sound is further attenuated by absorbing the sound.

  That is, in the mixer 1, an O-ring 29 that is an elastic member is interposed between the motor case 23 and the partition wall 24a. According to such a configuration, the vibration of the motor case 23 is absorbed by the O-ring 29 which is an elastic member, and the air exhausted from the motor case 23 is collided with the O-ring 29 so that the sound propagated by the air vibration is generated. By attenuating, the noise emitted from the mixer 1 can be further reduced.

  Further, the O-ring 29 of the mixer 1 constitutes a part of the exhaust path ER. According to such a configuration, noise can be reduced using the exhaust path ER, and it is not necessary to provide a separate silencing mechanism. Therefore, the quietness of the mixer 1 can be maintained while keeping the main body 20 compact. Can be achieved.

  Further, the exhaust hole 27 is opened in a direction inclined with respect to the axial direction of the drive shaft 22d and the direction orthogonal to the drive shaft 22d. That is, since the exhaust hole 27 is formed in the main body portion 20 in such a direction that the sound emitted from the exhaust hole 27 does not reach the user directly, it is configured such that the user can feel the noise reduction.

  That is, in the mixer 1 according to the embodiment of the present invention, the opening direction of the exhaust hole 27 that is an opening to the outside of the main body portion 20 of the exhaust path ER is the axial direction of the drive shaft 22d and the direction orthogonal to the axial direction. It is inclined with respect to it. For example, when the exhaust hole 27 is directed in the axial direction of the drive shaft 22d (that is, vertically downward), the sound is reflected on the installation surface of the mixer 1 to amplify the noise. It is possible to suppress the sound amplification effect due to the sound. Further, when the exhaust hole 27 is directed in a direction orthogonal to the drive shaft 22d (that is, in the horizontal direction), the noise of the mixer 1 directly reaches the user's ear, and the user feels a loud sound. By tilting, it is possible to suppress the noise from reaching the user's ear directly, and to make the user feel that the noise has been reduced.

  Further, the main body portion 20 may be configured such that a sound absorbing material is further disposed in the middle of the exhaust path ER, and for example, may be configured such that a sheet-like sound absorbing material is wound around the outer peripheral surface of the sound deadening case 24. And when a sound absorbing material is arranged inside the main body case 21, the sound that leaks through the main body case 21 due to the sound absorbing material can be reduced, so that the thickness of the members constituting the main body case 21 can be reduced. Thus, the main body case 21 can be made compact.

(Food part)
The hood portion 30 protrudes between the intake holes 24d and 24e that are openings to the outside of the intake path IR and the exhaust holes 27 that are openings to the outside of the exhaust path ER in the rotational radius direction of the drive shaft 22d of the motor 22. It is the part which was done. The hood portion 30 constitutes a wall that blocks the hot air exhausted from the exhaust hole 27 from entering the intake holes 24d and 24e again.
As described above, in the mixer 1, it is possible to suppress the air exhausted from the exhaust hole 27 from being directly sucked into the intake holes 24 d and 24 e, so that the cooling performance of the motor 22 can be ensured and the mixer 1 can be silenced. be able to.

(Confirmation result of noise reduction)
The effect of reducing the loudness was confirmed with respect to the mixer 1 according to an embodiment of the present invention. Unlike the noise value (dB), the “sound volume (loudness)” is a sensory amount representing the intensity of sound felt by human hearing, and how the user feels the sound of the mixer 1. Evaluation was performed from the viewpoint.

  The mixer 1 includes a muffler case 24 (partition wall 24 a) and an O-ring 29. Moreover, in the mixer 1, the motor case 23 is comprised by the cylindrical part 23a, the bottom part 23b, and the cover part 23c, and is set as the structure which raised the rigidity of the case. By adopting such a configuration, it was confirmed that the sound volume (loudness) was reduced by about 5 (one) compared to the conventional configuration without the silencing case 24 (partition wall 24a). It has been confirmed that the mixer 1 has a configuration that can be surely felt for the user to be quiet.

DESCRIPTION OF SYMBOLS 1 Mixer 10 Container part 20 Main body part 21 Main body case 22 Motor 22d Drive shaft (rotary shaft)
23 Motor case 23a Cylindrical part 23b Bottom part 23c Lid part 24 Silencer case 24a Partition part 24f Exhaust hole (communication hole)
26 Cooling fan 27 Exhaust hole 29 O-ring (elastic member)
IR intake path ER exhaust path ER1 first exhaust path ER2 second exhaust path

Claims (6)

A motor having a rotating shaft;
A motor case for housing the motor;
A body case for housing the motor case;
A cooling fan attached to the rotating shaft in the motor case;
A main body having
A container portion connected to the body portion;
With
In the main body part, a mixer is formed in which an intake path for sucking air into the motor case from the outside of the main body part and an exhaust path for exhausting air from the motor case to the outside of the main body part are formed. And
Partitioning the exhaust path into at least two partial exhaust paths, and further comprising a partition wall formed with a communication hole communicating the two or more partial exhaust paths.
A mixer characterized by that. The partial exhaust paths adjacent to each other defined by the partition walls are
Adjacent to the rotational radius direction of the rotating shaft,
The mixer according to claim 1. An elastic member is interposed between the motor case and the partition wall,
The mixer according to claim 1 or 2, characterized by the above-mentioned. The elastic member constitutes a part of the exhaust path,
The mixer according to claim 3. The motor case is
A cylindrical cylindrical part, a bottom part fitted to one end part in the cylindrical axial direction of the cylindrical part, and a lid part fitted to the other end part in the cylindrical axial direction of the cylindrical part,
The mixer as described in any one of Claims 1-4 characterized by the above-mentioned. The opening direction of the exhaust hole, which is an opening to the outside of the main body portion of the exhaust path,
Inclined with respect to the axial direction of the rotating shaft and the direction perpendicular to the axial direction,
The mixer according to any one of claims 1 to 5, characterized in that:

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