JP6239340B2 - Blower - Google Patents

Description

  The present invention relates to a blower that delivers a fluid such as high-temperature (low-temperature) air or gas.

  For example, in various manufacturing factories such as a food factory, a casting factory, and a vehicle factory, a blower that sends high temperature (low temperature) air to a processing chamber and uniformly agitates and circulates the processing chamber is used.

  As one type of the blower, a motor, an impeller connected to the tip of the rotation shaft of the motor and rotating, a casing that houses the impeller, and a support leg that is disposed on the back of the casing and supports the motor There is a blower provided. In this blower, high-temperature air is sucked in from the suction port at the center of the front of the casing, passes through the impeller in the radial direction, is sent out from the discharge port on the side of the casing into the processing chamber, and the processing chamber is stirred with high-temperature air.・ Circulated.

  In a blower that sends out high-temperature air, the impeller and the casing become hot due to contact with the high-temperature air, and the high heat of the impeller is transmitted to the motor through the rotating shaft of the motor, or the high heat of the casing causes the support leg to The motor may be damaged by high heat due to being transmitted to the motor case through the motor.

  Therefore, in order to protect the motor from high heat, for example, in the blower of Patent Document 1, a cooling fan is provided on the rotating shaft of the motor, and the support legs are provided with heat insulating rings and heat radiating rings alternately arranged. It is disclosed to use a heat radiating rod.

  In the blower disclosed in Patent Document 1, a rotating shaft through which high heat of the impeller is transmitted is cooled by a cooling fan, and heat transfer to the motor is avoided through the rotating shaft. Further, high heat from the casing is insulated and dissipated by the heat insulating heat dissipating rod (support leg), and heat transfer to the motor case is avoided through the heat insulating heat dissipating rod (support leg).

  In addition, for example, in a refrigerator provided with a control device that controls the rotational speed by adjusting the voltage applied to the fan motor, the internal fan and the machine room fan are fixed to the rotation shaft of each fan motor with a spring. There is. As a result, the fan is prevented from falling off the rotating shaft of the fan motor due to deterioration over time, ice adhering to the surrounding area, or the biting of foreign matter.

  As a technical document related to this, there is an abnormality detection device for a refrigerator disclosed in Patent Document 2. In this apparatus, since the abnormality detection operation for operating the notification means is executed, a temporary change due to the influence of the ambient temperature or the like is eliminated, and the drop-off of the fan from the fan motor is accurately detected and determined, and notification is given by the notification means. Structure.

JP 2007-247568 A Japanese Patent Laid-Open No. 11-101547

  The blower described in Patent Document 1 includes several heat insulating heat dissipating bars (support legs) disposed so as to surround the rotating shaft of the motor, a current plate provided on the heat insulating heat dissipating bar, and the current plate This is a structure provided with a cooling means by a further extended portion and cooling the rotating shaft and the like. Therefore, the cooling effect of the rotating shaft can be expected. However, it is thought that the extension part of a baffle plate may sometimes get in the way. In some cases, the installation location may be limited. Further, Patent Document 2 is an apparatus based on post-processing that executes an abnormality detection operation, and is not a structure that avoids the occurrence of an abnormality in advance, but is considered to be a subsequent response.

  In view of the above, an object of the present invention is to provide a blower that can improve heat dissipation and prevent heat storage in advance while reducing the size of the device and simplifying the structure of the device (for example, support legs). And

In order to achieve the above object, the blower according to the present invention is:
A motor,
An impeller provided on a rotating shaft of the motor;
A plurality of support legs that are provided around the rotary shaft at intervals and support the motor;
Together with the rotary shaft is inserted, and has an opening to allow the flow of air, said plurality of support legs regulations Ru is supported between the plates,
A cooling fan provided on the rotating shaft and provided at a position closer to the impeller than the regulating plate;
An extending wall portion extending toward the cooling fan, which is provided at an end portion of the restriction plate,
Is provided.

A motor control device for driving and controlling the motor;
And a support member that supports the motor control device so that the motor control device is positioned at the other end opposite to the one end on the impeller side of the motor.

  A first attachment portion formed at an end of the support leg on the motor side and attached to a supported portion of the motor; and a second attachment portion formed at an end of the support member on the motor side. Further, it may be fastened and fixed to the supported portion of the motor.

  With the rubber member interposed between the supported portion of the motor and the first mounting portion, and between the supported portion of the motor and the second mounting portion, the first mounting portion and the The second attachment portion may be fastened and fixed to the supported portion of the motor.

  A cover member may be provided that is connected to the support leg portion, surrounds the support leg portion, and overlaps the cooling fan in a direction perpendicular to the rotation axis.

  ADVANTAGE OF THE INVENTION According to this invention, heat dissipation can be improved, size reduction of an apparatus and simplification of the structure of an apparatus (for example, support leg part), and the blower which aims at heat storage prevention in advance can be provided.

It is a front view which shows an example of the use condition of the air blower which concerns on embodiment of this invention. (A), (b) is the bottom view and left view of the air blower which concern on embodiment of this invention. (A)-(c) is a front view of a blower, a right view, and a top view. (A), (b) is a bottom view and a left side view of a blower motor of a blower, and (c) is a view showing that a supporting leg and a supporting member are screwed to a supported portion of the motor via a rubber member. . (A), (b) is the top view and side view of a control board clamped between four support leg parts. (A)-(c) is the sectional view on the AA line of a cooling fan, a top view, and a front view. It is an enlarged view of the air blower of use condition. It is a partially broken sectional view of the air blower of a modification. (A), (b) is a side view of the control board of a modification.

  Hereinafter, a blower 10 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the blower 10 according to the present embodiment is used to send high-temperature air to a processing chamber 1 (for example, a defroster) and to stir and circulate the inside of the processing chamber 1 with high-temperature air. In addition, you may use the air blower 10 for low temperature air stirring after a high temperature process.

  A generation chamber 2 that generates high-temperature air is connected to the upper portion of the processing chamber 1. A blower 10 is mounted on the top of the generation chamber 2. Hot air in the generation chamber 2 is sent to the processing chamber 1 through the blower 10.

  Specifically, the blower 10 is attached to the base plate 3 that can be attached to and detached from the upper opening 2 a of the generation chamber 2. In a state where the base plate 3 is mounted in the upper opening 2 a of the generation chamber 2, the impeller 30 of the blower 10 is located inside the generation chamber 2. Moreover, for example, an electric heater 4 is disposed as a heat source at a location near the outer periphery of the impeller 30 in the base plate 3.

  High-temperature air generated by the electric heater 4 is agitated by the impeller 30 and circulates inside the generation chamber 2 as a circulation path R1. When the inside of the generation chamber 2 is filled with high-temperature air having a predetermined temperature (for example, 200 degrees), the connection port 5 to the processing chamber 1 (for example, a defroster) on the lower side of the generation chamber 2 is opened. And the high temperature air of the production | generation chamber 2 is sent out to the process chamber 1 by the air blower 10, and the inside of the process chamber 1 is stirred with high temperature air, and circulates like the circulation path R2. Thereby, the process (for example, thawing | decompression process) by high temperature air is performed to the target object (for example, to-be-thawed object) in the process chamber 1. FIG.

  The configuration of the blower 10 will be described. As shown in FIG. 2, the blower 10 drives and controls the motor 20, the impeller 30 connected to the distal end side of the rotating shaft 21 of the motor 20, the support leg 40 that supports the motor 20, and the motor 20. And a motor control device 50.

  As shown in FIG. 2A, the blower 10 is, for example, a centrifugal blower, and when the impeller 30 is rotated in the counterclockwise direction CCW, a circular suction port 34 formed on the front surface of the blower 10. This is a structure in which high temperature air is sucked in (in the direction of arrow A) and high temperature air is sent out from the radial (arrow B direction) discharge port 36.

  2 and 3, the impeller 30 is juxtaposed in the rotational direction between the front body 31 located on the front side, the rear plate 32 located on the rear side, and the front body 31 and the rear plate 32. And a plurality of (for example, 11) blades 33. The front body 31, the rear plate 32, and the blades 33 are metal members such as an aluminum alloy, for example.

  The front body 31 has a reverse trumpet-shaped portion 31b (reverse bell mouth shape) in which a central suction port 34 protrudes forward of the circular plate 31a. Hot air is sucked from the suction port 34 of the reverse trumpet portion 31b.

  As shown in FIG. 2 (b), the rear plate 32 is formed to protrude forward from a circular plate-shaped disc body 32a and a central portion of the disc body 32a, and the rotating shaft 21 of the motor 20 is fixed. And a cylindrical shaft support 32b.

  As shown in FIGS. 4A and 4B, a key convex portion 21 a that protrudes from the peripheral surface of the rotating shaft 21 and is long in the axial direction is formed on the distal end side of the rotating shaft 21 of the motor 20. A keyway 32d is formed in the fitting hole 32c (see FIG. 2B) formed in the shaft support portion 32b of the rear plate 32. As shown in FIG. 2B, the key convex portion 21a of the rotating shaft 21 is inserted into the key groove 32d of the fitting hole 32c provided in the shaft support portion 32b of the rear plate 32, and the rotating shaft 21 is connected to the rear plate. 32 (for example, a set screw is fixed).

  The fixing to the rear plate 32 of the rotating shaft 21 may be other methods such as press-fit fixing, fitting fixing, adhesive fixing, and welding fixing.

  As shown in FIG. 2A, both end portions of each blade 33 are coupled (for example, crimped) between the front body 31 and the rear plate 32. Each blade 33 is bent in the rotation direction and has a structure in which the discharge port 36 is formed along the rotation direction so that the sucked high-temperature air is blown out from the discharge port 36.

  Specifically, as shown in FIGS. 2A and 3C, the front body 31 and the rear plate 32 have a plurality of rectangular hole portions 35 formed along the blades 33. As shown in FIG. 2A, a protruding piece 33a is formed at the end of the blade 33 on the front body 31 side. The protruding piece 33a is inserted into the hole 35 of the front body 31, and as shown by a two-dot chain line in FIG. Moreover, although not shown in figure, the protrusion piece 33a is formed also in the edge part by the side of the rear surface board 32 of the blade | wing 33. FIG. The protruding piece 33a is inserted into the hole 35 of the rear plate 32, bent by caulking, and each blade 33 is coupled to the rear plate 32.

  As shown in FIG. 1, the motor 20 is supported on the base plate 3 by four support legs 40 attached to a plurality of locations (for example, four locations) on the outer periphery thereof. The shaft plate 6 is supported by a shaft seal device 6 such as a packing or gasket disposed on the base plate 3.

  Specifically, the main body frame 22 of the motor 20 is a metal (for example, cast iron) member formed in a substantially cylindrical shape. Supported portions 23 are formed to protrude at a plurality of locations (for example, 4 locations) on the outer periphery of the main body frame 22. A support leg portion 40 that supports the motor 20 is attached to each supported portion 23.

  The support leg 40 uses, for example, an elongated plate made of metal such as aluminum. As shown in FIG. 5, the support leg portion 40 is composed of a bent portion 41 in which both ends in the longitudinal direction thereof are bent in different directions, and an elongated plate-shaped main body portion 42 positioned between the two bent portions 41. The By forming the bent portion 41 by bending as described above, the heat radiation effect is improved by increasing the contact area or surface area, the strength of the main body 42 (support leg 40) is increased, and the main body 42 is thinned. Etc. can be achieved.

  As shown in FIGS. 2 to 4, the bent portion 41 on the upper side of the support leg 40 is attached to the supported portion 23 of the motor 20. The main body 42 of the support leg 40 is located at a distance from the periphery of the rotating shaft 21 of the motor 20 (is provided on the rotating shaft 21). Further, the lower bent portion 41 of the support leg portion 40 is attached to the base plate 3 as shown in FIG.

  Further, as shown in FIGS. 2 to 4, a restriction plate 60 is supported (for example, sandwiched) between the four support legs 40. The restriction plate 60 is a metal member such as an aluminum alloy, for example. Specifically, as shown in FIG. 5, a rectangular hole 43 that is long in the short-side direction, for example, is formed on the side of the support leg 40 near the impeller 30 of the main body 42. Further, at the four corners of the regulation plate 60, rectangular projections 61 that can be inserted into the rectangular holes 43 of the support legs 40 are formed to project. As shown in FIG. 5A, the protrusion 61 of the restriction plate 60 is inserted into the rectangular hole 43 of the support leg 40, and the distal end side of the protrusion 61 is expanded and deformed in the longitudinal direction of the rectangular hole 43, for example. Then, the restriction plate 60 is coupled (caulking) to the support leg 40.

  As shown in FIG. 5, the restriction plate 60 has a circular opening 62 into which the rotating shaft 21 of the motor 20 is inserted and is larger than the diameter of the rotating shaft 21. The opening space between the opening 62 and the rotating shaft 21 is a suction port through which air is sucked by rotation of the cooling fan 70 described below, and has a structure that allows air flow. That is, the restriction plate 60 has a role of controlling the air flow. As will be described in detail later, the restricting plate 60 sucks the upper air from the opening 62 and restricts the air flow so as to hit the lower cooling fan 70 and the extending wall 63.

  Further, as shown in FIGS. 2 to 4, a cooling fan 70 is attached to the rotating shaft 21 of the motor 20. The cooling fan 70 is a metal member such as an aluminum alloy, for example.

  As shown in FIG. 7, the cooling fan 70 is in the support leg portion 40 of the rotating shaft 21 and is preferably located slightly away from the base plate 3 on the impeller 30 side. The cooling fan 70 is provided between the regulation plate 60 and the base plate 3 and is attached to the rotating shaft 21.

  As shown in FIG. 6, the cooling fan 70 is formed with a disc body 71 and an insertion hole 72 that protrudes from a central portion of the disc body 71 on the motor 20 side and into which the rotating shaft 21 of the motor 20 is inserted. The projecting shaft portion 73, a plurality of (for example, six) blade portions 74 extending radially from the projecting shaft portion 73 and connected to the side surface of the motor 20 of the disc body 71, and the outer periphery of the projecting shaft portion 73 A female screw hole 75 penetrating from the surface toward the insertion hole 72 and having a female screw formed on the inner periphery thereof. A set screw 76 (for example, a hexagon socket set screw) indicated by a two-dot chain line in FIG. 6A is screwed into the female screw hole 75 of the protruding shaft portion 73, and the tip of the set screw 76 is inserted into the insertion hole 72. The cooling fan 70 is fixed to the rotating shaft 21 by tightening the set screw 76 until it is pressed against the rotating shaft 21.

  Furthermore, as shown in FIGS. 5 and 7, the restriction plate 60 has an extending wall portion 63 that extends toward the cooling fan 70. The extending wall portion 63 is refracted toward the cooling fan 70 so as to overlap the cooling fan 70 in a side view of the motor 20 (in a direction orthogonal to the rotation shaft 21). Specifically, the extending wall portion 63 has a positional relationship in which, for example, substantially the upper half of the blade portion 74 of the cooling fan 70 overlaps in the height direction (the axial length direction of the rotating shaft 21) in a side view of the motor 20. ing.

  Returning to FIG. 1, for example, a cable 51 from a control unit (not shown) of the generation chamber 2 is connected to the motor control device 50. A power supply voltage and a control signal are output to the motor control device 50 via the cable 51. A control unit (not shown) of the generation chamber 2 controls temperature and the like. In addition, the motor control device 50 and the motor 20 are connected by a cable 52, and the motor 20 is driven and controlled by the motor control device 50.

  As shown in FIG. 1, the motor control device 50 is supported by the support member 80 on the upper end of the motor 20 (the other end opposite to the one on the impeller 30 side of the motor 20). 2B and 3B, the support member 80 has a cono shape when viewed from the side, and a pair of cono that has a substantially rectangular shape when viewed from the bottom as shown in FIG. 3A. It is a bracket.

  As shown in FIGS. 3B and 3C, the attachment portion 81 on one side (the side close to the motor control device 50) of the support member 80 is screwed to the lower end side of the motor control device 50. Further, as shown in FIGS. 3B and 4B, the mounting portion 82 on the other side of the support member 80 (the side closer to the impeller 30) and the bent portion on the motor 20 side of the support leg 40. 41 is fastened to the supported portion 23 of the motor 20 together.

  Specifically, as shown in FIGS. 4B and 4C, the supported portion 23 of the motor 20 is formed to protrude from the outer periphery of the motor 20 and has a substantially U shape from the distal end side toward the proximal end side. A cutout portion 24 that is cut out is formed. A rubber member 90 is mounted on the supported portion 23 of the motor 20 as shown in FIG.

  As shown in FIG. 4C, the rubber member 90 is an elastic member formed in a substantially dumbbell shape, for example. Specifically, the rubber member 90 is formed by connecting a pair of disk-shaped bodies 91 having an opening at the center by a hollow shaft portion 92 at the center, and having the same size as the opening of the disk-shaped body 91 in the axial direction of the hollow shaft portion 92. This is a shape (substantially dumbbell shape) in which the cavity is formed penetrating in the axial direction. The rubber member 90 has such a size that the hollow shaft portion 92 can be inserted into the cutout portion 24 of the supported portion 23, and is attached to the cutout portion 24 of the supported portion 23.

  As shown in FIGS. 4B and 4C, the hollow shaft portion 92 of the rubber member 90 is inserted into the cutout portion 24 of the supported portion 23. An attachment portion 82 on the other side of the support member 80 (side closer to the impeller 30) is positioned above the rubber member 90. The bent portion 41 of the support leg 40 on the motor 20 side is positioned below the rubber member 90. The screw 83 is inserted into the screw hole 82a of the mounting portion 82 of the support member 80, the hollow shaft portion 92 of the rubber member 90, and the screw hole 41a of the bent portion 41 of the support leg 40 on the motor 20 side. The nut 84 is stopped at the front end side of.

  That is, between the supported portion 23 of the motor 20 and the bent portion 41 on the motor 20 side of the support leg 40, and on the other side of the supported portion 23 of the motor 20 and the support member 80 (side closer to the impeller 30). With the rubber member 90 interposed between the attachment portions 82, the support leg portion 40 and the support member 80 are coupled to the supported portion 23 of the motor 20 by a fastener (screw 83 and nut 84). Tightened and fixed.

  The screw 83 and the nut 84 (see FIG. 4B) are made of, for example, stainless steel, have low thermal conductivity, and the heat from the support leg 40 is transmitted to the support member 80 via the screw 83. Reduced. Further, the rubber member 90 has a low thermal conductivity, so that heat from the support leg 40 is reduced from being transmitted to the main body frame 22 and the support member 80 of the motor 20 via the rubber member 90.

  Here, the flow of wind and the cooling by the cooling fan 70 will be described with reference to FIG. The cooling fan 70 is rotated by the rotation of the rotating shaft 21 of the motor 20. As the cooling fan 70 rotates, the air on the motor 20 side of the regulating plate 60 is sucked into the opening 62 as indicated by an arrow a. The sucked air cools the rotating shaft 21 of the motor 20 and then is sent out in the radial direction of the cooling fan 70 as shown by the arrow b, hits the extending wall portion 63, and the regulation plate 60 is also actively cooled. In addition, the support leg 40 connected to the restriction plate 60 is also cooled. Further, the air directed to the base plate 3 by hitting the extending wall portion 63 is sent in the radial direction along the surface of the base plate 3 as indicated by an arrow c, and the base plate 3 is also cooled.

  As described above, in the blower 10 according to the present embodiment, since the end portion of the restriction plate 60 is the extended wall portion 63 extending to the cooling fan 70 side, the end portion of the restriction plate 60 is the plate surface direction. Therefore, the apparatus can be miniaturized and a heat radiation area can be secured. Further, the restriction plate 60 can be actively cooled by applying the wind from the cooling fan 70 to the extending wall portion 63.

  Further, the extending wall portion 63 of the regulating plate 60 extends toward the cooling fan 70 so as to overlap the cooling fan 70 in a side view of the motor 20 (in a direction orthogonal to the rotation shaft 21). For this reason, the wind from the cooling fan 70 strikes the extending wall 63 of the regulating plate 60 to which a part of the high heat transmitted from the impeller 30 to the support leg 40 is guided. The restriction plate 60 can be cooled, and the heat dissipation of the support leg 40 can be enhanced. Furthermore, the wind from the cooling fan 70 is sent to the impeller 30 side by the extending wall portion 63, and the base plate 3 to which the end portion of the support leg 40 on the impeller 30 side is attached can be cooled.

  Specifically, the impeller 30 rises to near the high temperature air by contacting the high temperature air (for example, about 150 to 200 degrees) in the generation chamber 2 shown in FIG. Even in a situation where high heat from the impeller 30 is transmitted to the rotating shaft 21, the cooling fan 70 can desirably cool the rotating shaft 21 to approximately 40 degrees close to the outside air temperature. Further, even when high heat from the base plate 3 of the generation chamber 2 is transmitted to the support leg 40, the wind from the cooling fan 70 hits the regulation plate 60 and / or the extension wall 63, The restricting plate 60 and / or the extending wall portion 63 is actively cooled to improve the heat dissipation of the support leg portion 40, and the wind from the cooling fan 70 is blown onto the base plate 3 by the extending wall portion 63. Therefore, the support leg 40 can be desirably cooled to about 40 degrees close to the outside air temperature.

  Since the heat dissipation of the rotating shaft 21 and / or the support leg 40 is improved, it is not necessary to equip a separate heat dissipation member or heat insulation member, which can contribute to simplification of the structure and reduction in the number of parts. Note that the extension wall 63 of the regulation plate 60 increases the strength of the regulation plate 60 itself, increases the rigidity of the support leg 40 and contributes to the thinning of the material, etc., and provides a separate auxiliary support plate. It can be made unnecessary. Further, the extending wall portion 63 can also conceal the cooling fan 70 and can also function as a protector.

  Further, a support member 80 is provided to support the motor control device 50 so that the motor control device 50 is positioned at the other end opposite to the one end on the impeller 30 side of the motor 20. That is, the motor control device 50 is disposed at the other end of the motor 20 farther from the impeller 30. Therefore, the motor control device 50 can be arranged away from the heat source, and adverse effects due to heat can be reduced.

  Further, since the bent portion 41 on the upper side of the support leg 40 and the attachment portion 82 of the support member 80 are fastened and fixed to the supported portion 23 of the motor 20, the supported portion 23 of the motor 20 to which the support leg 40 is attached. In addition, the attachment portion 82 of the support member 80 can be attached, the supported portion 23 of the motor 20 can be effectively used, and the fasteners such as screws can be reduced.

  Further, a rubber member 90 is interposed between the supported portion 23 of the motor 20 and the bent portion 41 on the upper side of the support leg portion 40 and between the supported portion 23 of the motor 20 and the mounting portion 82 of the support member 80. Therefore, heat transfer can be suppressed by the rubber member 90, and shock and vibration can be absorbed.

  Moreover, the impeller 30 can be assembled by caulking. Specifically, the protruding piece 33a of the blade 33 can be assembled by inserting into the hole 35 of the front body 31 and the hole 35 of the rear plate 32 and crimping (bending). Therefore, it is only necessary to caulk the projecting piece 33a of the blade 33, and it can be easily assembled as compared with the assembly by welding, and the troublesomeness associated with the work of the welding machine can be eliminated and the cost can be reduced. In addition, quality can be improved without occurrence of distortion or the like.

  In addition, in this embodiment, when the inside of the production | generation chamber 2 is filled with high temperature air, the connection port 5 to the process chamber 1 will be opened, but it is not restricted to this. For example, before the electric heater 4 is energized, at the start of energization, immediately after energization, etc., before the interior of the generation chamber 2 is filled with high-temperature air, the connection port 5 to the processing chamber 1 is opened, and the high-temperature air in the generation chamber 2 is discharged into the processing chamber. 1 may be transmitted.

  In the present embodiment, when the processing chamber 1 and the generation chamber 2 can be connected and separated, the blower 10 is disposed in the generation chamber 2 so that the impeller 30 is located inside the generation chamber 2. However, the present invention is not limited to this. For example, in the single device configuration of the processing chamber 1, the blower 10 may be disposed in the processing chamber 1 so that the impeller 30 is positioned in the processing chamber 1.

  In the present embodiment, one or more blowers 10 are arranged in the generation chamber 2. In the single apparatus configuration of the processing chamber 1, one or a plurality of blowers 10 are arranged in the processing chamber 1.

  Moreover, in this embodiment, although members, such as the impeller 30, the control board 60, and the cooling fan 70, are metal (for example, aluminum alloy) members, it is not restricted to this. For example, you may form with metal materials (for example, carbon steel, forged steel, cast iron, etc.) other than an aluminum alloy, and if the material differs for each member (for example, the front body 31, the rear surface board 32, the blade | wing 33, etc.). May be configured.

  Moreover, although the main body frame 22 is formed with cast iron, it is not restricted to this. For example, you may form with metal materials (for example, stainless steel, carbon steel, forged steel, aluminum alloy etc.) other than cast iron.

  Moreover, although the support leg part 40 is formed with the aluminum alloy, it is not restricted to this. For example, you may form with metal materials (for example, carbon steel, forged steel, cast iron etc.) other than stainless steel. Further, the support leg 40 may be formed of stainless steel having a lower thermal conductivity than aluminum alloy or the like. In this case, heat transfer to the main body frame 22 of the motor 20 can be reduced.

  In the present embodiment, the front body 31 of the impeller 30 is shaped like an inverted bell mouth, and the suction port 34 is formed on the protruding tip side, but this is not limitative.

  In the present embodiment, the blade 33 of the impeller 30 is a backward blade, but may be a forward blade or a radial blade. Further, the protruding piece 33a of the blade 33 is inserted into the hole 35 of the front body 31 and the hole 35 of the rear plate 32, and is bent by so-called caulking. Other caulking processes include, for example, twisting, Caulking such as crushing may be used. Also, the blade 33 can be fixed to the front body 31 or the rear plate 32 by a method other than caulking, for example, various fastening methods such as fastening with a fastener such as a screw, fitting with a fitting portion, adhesion with an adhesive, and welding. It may be adopted.

  Moreover, this embodiment is good also as 10 A of air blowers provided with the casing 37 which accommodates the impeller 30, as shown in FIG. The casing 37 is, for example, a metal (for example, aluminum alloy) member. High-temperature gas (for example, high-temperature air) is sucked from the suction port 34 formed on the front side of the casing 37, and high-temperature gas is discharged from the discharge port 38 formed at the outer peripheral portion of the casing 37.

  In FIG. 8, a fan guard 100 made of, for example, a net-like metal (for example, aluminum alloy) is attached to the suction port 34 and the discharge port 38. The mounting of the fan guard 100 is free.

  Further, as shown in FIG. 7, the extending wall portion 63 of the restricting plate 60 overlaps substantially in the upper half of the height direction of the blade portion 74 of the cooling fan 70 (the axial length direction of the rotating shaft 21). However, it is not limited to this. For example, the extending wall portion 63 may overlap at least a part of the cooling fan 70 in the side view of the motor 20 or may overlap the entire cooling fan 70.

  In addition, as shown in FIG. 8, the blower 10 according to the present embodiment includes a cover member 110 that surrounds the cooling fan 70 in a side view of the motor 20 (in a direction orthogonal to the rotation shaft 21 of the motor 20). It is good. As shown in FIG. 9, the cover member 110 is a metal member such as an aluminum alloy, for example, has a box shape with an opening on the casing 37 side, and has a plurality of air holes 111 formed therein.

  In the blower 10 </ b> A, the cover member 110 overlaps the cooling fan 70 when viewed in a direction orthogonal to the rotation shaft 21, so that a part of the high heat is guided from the impeller 30 to the cover member 110, and is sent to the cover member 110 from the cooling fan 70. It is possible to cool by applying the wind of the above, and the heat dissipation of the rotating shaft 21 can be enhanced.

  In addition, you may make it provide the cover member 110 in the air blower 10 shown in FIG.

  Further, in the present embodiment, as shown in FIG. 5, the protrusions 61 at the four corners of the restriction plate 60 are inserted into the rectangular holes 43 of the support leg portion 40 and crimped, but the present invention is not limited thereto. For example, as shown in FIG. 9A, at the four corners of the restriction plate 60, bent portions 65 that are bent toward the impeller 30 are provided, and the bent portions 65 are fastened to the support leg portion 40 with screws 66 or the like. It is good also as the surface contact part 67 which is fastened with a tool and the surface which opposes the support leg part 40 of the bending part 65 surface-contacts the support leg part 40.

  In this case, since the surface contact portion 67 of the regulation plate 60 abuts the support leg portion 40 in a wide range, the heat from the support leg portion 40 is easily transmitted to the regulation plate 60, and the heat dissipation of the support leg portion 40 is improved. Further improvement can be achieved. Further, the bent portion 65 of the regulating plate 60 may be bent toward the motor 20 as shown by a two-dot chain line in FIG.

  Further, as shown in FIG. 9B, the extending wall portion 63 of the regulation plate 60 may include an extended portion 63 a that is expanded so that the lateral end thereof is in contact with or close to the support leg portion 40. . In this case, it is possible to eliminate or further reduce the gap between the extending wall portion 63 and the support leg portion 40 of the regulating plate 60, and all or almost all of the air sent radially from the cooling fan 70 is used as the base plate. 3 can be sent out radially along the surface 3, and the amount of wind passing through the gap between the extending wall portion 63 and the support leg 40 can be reduced by being short-cut on the shortcut st and sucked into the opening 62.

  Moreover, in this embodiment, the example which stirs and circulates the inside of the process chamber 1 (for example, defroster) with high temperature air is shown as an example of use of the air blowers 10 and 10A. However, the target of attachment of the blowers 10 and 10A is not limited to this. For example, the blowers 10 and 10A can be attached to various manufacturing factories such as a food factory, a casting factory, and a vehicle factory, and used for ventilation of the factory.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention, and do not limit the scope of the present invention.

10, 10A Blower 20 Motor 21 Rotating shaft 30 Impeller 40 Support leg portion 41 Bending portion (first mounting portion)
DESCRIPTION OF SYMBOLS 50 Motor control apparatus 60 Control board 62 Opening part 63 Extension wall part 70 Cooling fan 80 Support member 82 Attachment part (2nd attachment part)
90 Rubber member 110 Cover member

Claims (5)

A motor,
An impeller provided on a rotating shaft of the motor;
A plurality of support legs that are provided around the rotary shaft at intervals and support the motor;
Together with the rotary shaft is inserted, and has an opening to allow the flow of air, said plurality of support legs regulations Ru is supported between the plates,
A cooling fan provided on the rotating shaft and provided at a position closer to the impeller than the regulating plate;
An extending wall portion extending toward the cooling fan, which is provided at an end portion of the restriction plate,
A blower characterized by comprising: A motor control device for driving and controlling the motor;
A support member that supports the motor control device so that the motor control device is positioned at the other end opposite to the one end on the impeller side of the motor;
The blower according to claim 1, comprising: A first attachment portion formed at an end of the support leg on the motor side and attached to a supported portion of the motor; and a second attachment portion formed at an end of the support member on the motor side. , Fasten together to the supported part of the motor,
The blower according to claim 2. With the rubber member interposed between the supported portion of the motor and the first mounting portion, and between the supported portion of the motor and the second mounting portion, the first mounting portion and the Fixing the second mounting portion together with the supported portion of the motor;
The blower according to claim 3. A cover member that is connected to the support leg and surrounds the support leg and overlaps the cooling fan in a direction perpendicular to the rotation axis;
The blower according to any one of claims 1 to 4, wherein the blower is provided.

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