Air blower

Abstract

To provide an air blower having an inexpensive air blowing guide part that can be easily manufactured and installed in a casing.SOLUTION: An air conditioner 1 includes: a fan rotor 8 rotating about a rotating center; and a casing 3 that accommodates the fan rotor 8 and releasing air taken into inside by using rotational centrifugal force of the fan rotor 8. The casing includes an air blowing guide part for guiding the air released from the fan rotor 8 toward an upper opening part 10 (blowing out direction). The air blowing guide part comprises: guide wall parts 52a, 52b, 52c comprising wall parts 31c-31e opposing to the fan rotor 8 radially in the casing 3; and a plurality of guide wall parts 42a, 42b, 42c extending in the circumferential direction of the fan rotor 8 on the inner sides of the wall parts 31c-31e.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a blower device including a fan rotor and a casing.

Background Art

[0002] Conventionally, as a blower device used for air conditioning and the like in various industrial fields, a centrifugal blower such as a plug fan in which a plurality of blades radially arranged around the rotation center rotate, and the air taken into the interior is discharged by rotational centrifugal force is known.

[0003] The fan rotor of this type of blower device is housed in a rectangular parallelepiped-shaped casing so that the direction of the air discharged from the fan rotor can be changed and supplied to an air supply duct or the like. Further, inside the casing, a blower guide part constituted by a plate-like member made of a flexible material is arranged in a substantially U-shape along a corrected Archimedes curve that is narrower and descends downward compared to an ideal Archimedes curve, thereby improving the blowing efficiency (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the blower device described in Patent Document 1 above, since one large plate-like member is bent into a U-shape and installed along the circumferential direction of the fan rotor, the manufacturing and installation operations are large-scale and laborious, and since the blower guide part is constituted by a plate-like member separate from the wall part of the casing, there is a problem that the manufacturing cost increases.

[0006] The present invention has been made paying attention to such problems, and an object thereof is to provide a blower device in which a blower guide part that is easy and inexpensive to manufacture and install is provided inside a casing.

Means for Solving the Problems

[0007] In order to solve the above problems, the blower device of the present invention is a blower device including a fan rotor that rotates around a rotation center, and a casing that houses the fan rotor and discharges the air taken therein by the rotational centrifugal force of the fan rotor, the casing includes a blower guide part that guides the air discharged from the fan rotor in the delivery direction, the blower guide part is characterized in that it is constituted by a wall part that faces the fan rotor in the radial direction in the casing and a plurality of guide wall parts that extend in the circumferential direction of the fan rotor inside the wall part. According to this feature, since the wall part of the casing and the plurality of guide wall parts installed inside thereof can constitute a blower guide part that extends in the circumferential direction of the fan rotor, the manufacturing and installation work of the blower guide part becomes easy, and the manufacturing cost can be reduced by using the wall part of the casing.

[0008] The plurality of guide wall parts are characterized in that they are constituted by plate-like members. According to this feature, the guide wall parts can be easily manufactured.

[0009] The plurality of guide wall parts are characterized in that they are arranged so as to cover the corners inside the casing. According to this feature, the air discharged from the fan rotor can be smoothly guided without being retained at the corners.

[0010] The plurality of guide wall parts are respectively arranged on the left and right sides of the fan rotor, and a specific guide wall part arranged on at least one side of the left and right is detachably attached to the constituent material of the casing. According to this feature, by removing the inner wall portion of the specific design from the structural material, it becomes possible to take out the fan rotor laterally, so that the replacement and maintenance work of the fan rotor can be easily performed.

[0011] The fan rotor is arranged at a position offset to one side in the left-right direction of the casing. The inner wall portion of the specific design is characterized by being arranged on the other side of the casing. According to this feature, since it can be taken out from a wide space, the workability is improved.

[0012] The plurality of guide wall portions are characterized by being arranged along a virtual Archimedes curve extending in the circumferential direction from the rotation center of the fan rotor. According to this feature, the air discharged from the fan rotor can be efficiently guided.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0014] The mode for carrying out the blower device according to the present invention will be described below based on an embodiment.

Embodiment

[0015] The air conditioner 1 as an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1(a) is a plan view showing the air conditioner, and FIG. 1(b) is a left side view showing the air conditioner. In the following description, the right side of FIGS. 1(a) and 1(b) will be described as the front side of the air conditioner.

[0016] As shown in FIGS. 1(a) and 1(b), the air conditioner 1 (hereinafter abbreviated as the air conditioner 1), which is a blower device that generates and sends out air (conditioned air) with adjusted temperature and humidity, has an opening 5 for taking in outside air before air conditioning provided on the plane, and a housing 2 having an opening 6 for taking in return air from the indoor area provided on the back surface. The air conditioner 1 also includes a casing 3 provided with an opening 10 for taking in conditioned air and sending it indoors on the plane. The housing 2 and the casing 3 are connected via a connecting portion 11, and their interiors are in communication. Although not particularly shown, ducts are connected to the respective openings 5, 6, and 10.

[0017] The housing 2 has a substantially rectangular parallelepiped shape with a space inside, and each plate except the bottom plate is made of a sandwich panel in which a heat insulating material such as urethane is sandwiched between two thin plates. A plurality of openable doors are provided on the housing 2, allowing an operator to enter the interior.

[0018] As shown in Fig. 1(b), the housing 2 mainly includes an air filter 12 for removing particles such as dust in the air flowing in from the openings 5 and 6, a cold water coil 7a for cooling the air passing through the air filter 12 with the cold water supplied from outside the machine, and a hot water coil 7b for heating the air passing through the air filter 12 with the hot water supplied from outside the machine, a heat exchanger 7 composed of the above, a humidifier 9 for appropriately humidifying the air heat-exchanged by the heat exchanger 7, and a control panel (not shown in the figure) as a control unit for controlling various devices provided in the housing 2 and the casing 3. Although not particularly shown, in the housing 2, in addition to the above, a pressure gauge for measuring the pressures of the air before and after heat exchange, a hygrometer for measuring the humidity of the air flowing into the housing 2, a thermometer for measuring the temperature of the heat medium before heat exchange, a thermometer for measuring the temperature of the heat medium after heat exchange, a thermometer for measuring the temperature of the air after heat exchange, etc. are installed. That is, the air conditioner 1 is configured as a unit in which a set of devices such as the heat exchanger 7, the humidifier 9, and the fan rotor 8 described above are arranged in the housing 2.

[0019] As shown in Figs. 2 to 4, the casing 3 includes a base frame body 20 composed of a plurality of metal frames 20a arranged on the floor surface, a housing frame body 21 composed of a plurality of metal frames 21a erected at the upper rear part of the base frame body 20, and wall portions 31a to 31e respectively attached to the front, rear, lower, left, and right surfaces of the housing frame body 21 by screws (not shown in the figure). It has an opening 33 for taking in the conditioned air at the rear, and is formed in a rectangular parallelepiped shape having an opening 10 for sending out the conditioned air on the upper surface. Note that the shape of the casing 3 is not limited to a rectangular parallelepiped shape and can be variously changed. Also, the casing 3 may be installed inside the housing 2.

[0020] Inside the casing 3, a fan rotor 8 is accommodated and is configured to be rotationally driven by a drive motor 18 installed outside the casing 3. Also, inside the casing 3, air guide plates 41a to 41c for guiding the air radially emitted from the fan rotor 8 toward the upper opening 10 are provided.

[0021] The rear wall portion 31b is composed of a metal plate and is disposed as a partition plate that partitions the housing 2 and the casing 3. Further, the wall portions 31a, 31c to 31e excluding the wall portion 31b are composed of a sandwich panel in which a heat insulating material such as urethane is sandwiched between two thin plates. Although not shown in particular detail, these wall portions 31a to 31e are detachably attached to the housing frame 21 by screw members (not shown) attached to the metal frame 21a constituting each surface of the housing frame 21 from the inside. Incidentally, these wall portions 31a to 31e may be detachably attached to the metal frame 21a by other attachment means such as latch members, surface fasteners, or locking hooks instead of screw members.

[0022] The fan rotor 8 is mainly composed of two disks 14a and 14b arranged opposite to each other in the front and rear, and a plurality of blade plates 15 radially arranged around the rotation center between the disks 14a and 14b. Each blade plate 15 is provided at substantially equal intervals in the circumferential direction so as to incline in the clockwise direction (the rotation direction of the fan rotor 8) toward the outer diameter direction in a front view.

[0023] A coupling 19 for detachably attaching the rotation shaft 18a of the drive motor 18 in the axial direction is fixed at the center position of the front disk 14a. On the other hand, an opening 14c is formed at the center of the rear disk 14b, and the front portion of the bellmouth-shaped fan hopper 13 fixed to the rear wall portion 31b is slightly inserted into the opening 14c in a non-contact state. Incidentally, the fan hopper 13 is detachably attached to the wall portion 31b through attachment means such as screw members (not shown) in a state of being inserted into the opening 33 formed in the rear wall portion 31b from the outside.

[0024] The drive motor 18 is fixedly installed on the upper part of a motor installation pedestal 17 erected at the upper front of the base frame 20 outside the casing 3. The rotating shaft 18a of the drive motor 18 is inserted forward from the outside into a circular insertion opening 32 formed in the front wall portion 31a, and a fan rotor 8 is non-rotatably attached to the tip portion protruding into the casing 3 via a coupling 19. Incidentally, although the fan rotor 8 is directly attached to the rotating shaft 18a of the drive motor 18, it may be indirectly attached to the rotating shaft 18a via a fan belt or the like.

[0025] The fan rotor 8 configured as described above is accommodated in the casing 3 in a state of being attached to the rotating shaft 18a of the drive motor 18 facing the front-rear direction, and is radially opposed to the wall portion 31d on the left side, the wall portion 31c on the lower side, the wall portion 31e on the right side, and the upper surface. The fan rotor 8, the drive motor 18, the air supply guide plates 41a to 41c, the casing 3, etc. constitute a plug fan (air supply device), which is an example of a centrifugal air blower.

[0026] As shown in FIGS. 3 and 4, when the drive motor 18 rotates the rotating shaft 18a counterclockwise in a front view, the air taken into the inside of the fan rotor 8 from the fan hopper 13 passes between the respective blade plates 15 in a front view and is discharged in the outer diameter direction and counterclockwise. The air discharged from the fan rotor 8 moves in the direction of rotation of the fan rotor 8 and flows out from the upper opening 10. In this case, as shown in FIG. 3, since the air volume on the right side in the rotation direction (the side where the blade plate 15 moves upward) is tendentially larger than that on the left side in the rotation direction (the side where the blade plate 15 moves downward), the rotating shaft 18a (rotation center) facing the front-rear direction is arranged at a position slightly eccentric to the left of the central position in the left-right direction in the casing 3.

[0027] As shown in FIGS. 2 to 4, the air supply guide plates 41a to 41c are made of a metal plate such as stainless steel, and include flat guide wall portions 42a to 42c having front and rear dimensions that can be arranged between the front and rear wall portions 31a and 31b, and attachment wall portions 43a to 43c that bend downward from the front and rear edges of the guide wall portions 42a to 42c. Note that the material of the air supply guide plates 41a to 41c is arbitrary and may be made of a synthetic resin material or the like. Also, these air supply guide plates 41a to 41c have a length dimension smaller than that of each of the wall portions 31c to 31e.

[0028] Further, screw holes are formed on both longitudinal sides of each of the attachment wall portions 43a to 43c. By screwing screw members N1 to N3 attached from the outside into a plurality of attachment holes formed in the front and rear wall portions 31a and 31b into the screw holes on both sides of the attachment wall portions 43a to 43c, the air supply guide plates 41a to 41c can be detachably attached to the front and rear wall portions 31a and 31b. Note that these attachment wall portions 43a to 43c may be detachably attached to the wall portions 31a and 31b by other attachment means such as latch members, surface fasteners, or locking hooks instead of screw members.

[0029] Note that in this embodiment, the air supply guide plates 41a to 41c are attached to the wall portions 31a and 31b by screw members N1 to N3 attached from the outside to the front and rear wall portions 31a and 31b, but may be attached to the wall portions 31a and 31b by screw members N1 to N3 attached from the inside of the attachment wall portions 43a to 43c. By doing so, the air supply guide plates 41a to 41c can be attached without forming attachment holes for the screw members N1 to N3 through the wall portions 31a and 31b, and thus leakage of the air supply to the outside can be prevented.

[0030] Further, as shown in FIG. 3, the air guide plates 41a to 41c are preferably arranged at intervals in the circumferential direction of the fan rotor 8 such that the guide wall portions 42a to 42c are along a virtual Archimedes curve T (or a curve approximating the Archimedes curve) that is centered on the rotation axis 18a, which is the center of rotation of the fan rotor 8 in a front view, and preferably overlap the tangent of the virtual Archimedes curve T. Further, the separation dimensions between the outer ends of the respective blade plates 15 of the fan rotor 8 and the respective guide wall portions 42a to 42c facing the blade plates 15 increase in the order of the air guide plate 41a, the air guide plate 41b, and the air guide plate 41c.

[0031] The upper end of the air guide plate 41a defines the opening 10, and the lower end is located at the wall portion 31d on the left side surface, and it is arranged to cover the upper left corner inside the casing 3. Also, the upper end of the air guide plate 41b is located at the wall portion 31d on the left side surface, and the lower end is located at the wall portion 31c on the lower surface, and it is arranged to cover the lower left corner inside the casing 3. Further, the upper end of the air guide plate 41c is located at the wall portion 31e on the right side surface, and the lower end is located at the wall portion 31c on the lower surface, and it is arranged to cover the lower right corner inside the casing 3.

[0032] Therefore, a guide wall portion 52a is provided between the air guide plates 41a and 41b on the left side surface wall portion 31d, a guide wall portion 52b is provided between the air guide plates 41b and 41c on the lower surface wall portion 31c, and a guide wall portion 52a is provided above the air guide plate 41c on the right side surface wall portion 31e.

[0033] That is, the air blown out from the inside of the fan rotor 8 in the outer diameter direction and counterclockwise is guided toward the opening 10 by a blower guide portion. The guide wall portions 42a, 42b, 42c formed by the blower guide plates 41a to 41c and the guide wall portions 52a, 52b, 52c formed by the wall portions 31c to 31e are alternately arranged from the upstream side to the downstream side in the blowing direction. Thus, the guide wall portions 42a, 52a, 42b, 52b, 42c, 52c that are continuous in order counterclockwise over the circumferential direction of the fan rotor 8 are formed. Therefore, the air in the fan rotor 8 is discharged into the space surrounded by the guide wall portions 42a, 52a, 42b, 52b, 42c, 52c and the front and rear wall portions 31a, 31b (see the shaded area in FIG. 3).

[0034] Further, these guide wall portions 42a, 52a, 42b, 52b, 42c, 52c are arranged so as to be sequentially spaced apart in the radial direction from the rotation axis 18a (rotation center) of the fan rotor 8 and are formed so as to approximate the above-described Archimedes curve T. Thereby, since the air discharged from the fan rotor 8 toward the outside can be efficiently guided by the guide wall portions 42a, 52a, 42b, 52b, 42c, 52c, the static pressure effect is improved as compared with the case where the blower guide plates 41a to 41c are not provided.

[0035] Also, among the wall portions 31a to 31e constituting the casing 3, while using the wall portions 31c to 31e facing the fan rotor 8 in the radial direction, a plurality of blower guide plates 41a to 41c are installed inside thereof, whereby a blower guide portion composed of the guide wall portions 42a, 52a, 42b, 52b, 42c, 52c is formed over the circumferential direction of the fan rotor 8. Therefore, a large-scale installation work such as bending and arranging a single large plate-like member as in the conventional case becomes unnecessary, manufacturing and installation become easy, and the manufacturing cost can be reduced by using the wall portions 31c to 31e of the casing 3.

[0036] Further, when performing maintenance work such as replacing the fan rotor 8 due to long-term use or replacing the drive motor 18 and the motor bushing (not shown), as shown in FIG. 5, it can be taken out from the inside of the casing 3 to the right side.

[0037] Specifically, as shown in Fig. 5(a), first, remove the wall portion 31e on the right side surface of the casing 3 from the housing frame 21 to open the right side surface. At the same time, among the air guiding plates 41a to 41c, remove the screw member N3 of the air guiding plate 41c arranged on the right side of the fan rotor 8 from the front and rear wall portions 31a and 31b, and extract the air guiding plate 41c outward from the right side surface of the opened housing frame 21.

[0038] Next, as shown in Fig. 5(b), approach the rear wall portion 31b from the housing 2 side, and remove the fan hopper 13 backward from the wall portion 31b. Still, with the fan rotor 8 supported at a predetermined height position by some supporting means (not shown) so that it does not fall, remove the coupling 19 from the rotating shaft 18a, and slide the fan rotor 8 backward to a position where it does not interfere with the rotating shaft 18a.

[0039] Then, as shown in Fig. 5(c), by sliding the fan rotor 8 to the right side while being supported by some supporting means (not shown), it can be extracted from the right side surface of the opened housing frame 21 to the right side.

[0040] In this way, since the wall portion 31e on the right side surface of the casing 3 and the air guiding plate 41c arranged on the right side of the fan rotor 8 are detachably attached to the housing frame 21 and the front and rear wall portions 31a and 31b, even when the air guiding portion is provided inside the casing 3, by simply removing the wall portion 31e on the right side surface, which is one side surface of the casing 3, and the air guiding plate 41c, the fan rotor 8 can be extracted outside the casing 3.

[0041] As described above, the air conditioner 1 as an embodiment of the present invention includes a fan rotor 8 that rotates around a rotation center, and a casing 3 that houses the fan rotor 8 and discharges the air taken into the interior by the rotational centrifugal force of the fan rotor 8. The air conditioner 1 is provided with a blowing guide portion that guides the air discharged from the fan rotor 8 toward the upper opening 10 (discharge direction). The blowing guide portion is composed of guide wall portions 52a, 52b, 52c formed by wall portions 31c to 31e that face the fan rotor 8 in the radial direction in the casing 3, and a plurality of guide wall portions 42a, 42b, 42c that extend in the circumferential direction of the fan rotor 8 inside the wall portions 31c to 31e.

[0042] According to this, since the wall portions 31c to 31e of the casing 3 and the plurality of guide wall portions 42a, 42b, 42c arranged inside thereof can form a blowing guide portion that extends in the circumferential direction of the fan, the manufacturing and installation operations of the blowing guide plates 41a to 41c that constitute the blowing guide portion are facilitated, and the manufacturing cost can be reduced by using the wall portions 31c to 31e of the casing 3.

[0043] In addition, since the plurality of guide wall portions 42a, 42b, 42c are constituted by the blowing guide plates 41a to 41c made of flat metal members, the guide wall portions 42a, 42b, 42c can be easily manufactured. Further, since the blowing guide plates 41a to 41c are smaller and lighter than the wall portions 31a to 31e, they are easier to handle than when the blowing guide portion is constituted by a single plate member.

[0044] In addition, since the plurality of guide wall portions 42a, 42b, 42c are installed so as to cover the upper left corner portion, the lower left corner portion, and the lower right corner portion inside the casing 3, the air discharged from the fan rotor 8 can be smoothly guided without being retained at the corners.

[0045] Further, the plurality of guide wall portions 42a, 42b, 42c are respectively arranged on the left and right sides of the fan rotor 8. The guide wall portion 42c as a specific guide wall portion arranged on one side (the right side in this example) of the left and right is detachably attached to the wall portions 31a, 31b which are constituent members of the casing 3 by screw members N3. According to this, by removing the guide wall portion 42c from the wall portions 31a, 31b, the fan rotor 8 can be taken out to the right side of the casing 3, so that the replacement of the fan rotor 8, maintenance work, etc. can be easily performed.

[0046] Further, the fan rotor 8 is arranged at a position biased to the left side in the left - right direction of the casing 3, and the guide wall portion 42c as a specific guide wall portion is arranged on the right side of the casing 3, so that it can be taken out from a wide space, improving workability. That is, the space is wider on the downstream side in the blowing direction, and since only one air - blowing guide plate 41c needs to be removed, workability is improved. Also, since the air - blowing guide plate 41c which is at the position farthest from the fan rotor 8 in the radial direction among the air - blowing guide plates 41a to 41c is removed, it is possible to prevent contact with and damage to the fan rotor 8 during the attachment and detachment work.

[0047] Further, the plurality of guide wall portions 42a to 42c are arranged along a virtual Archimedes curve T extending in the circumferential direction from the rotation center of the fan rotor 8, so that the air discharged from the fan rotor 8 can be efficiently guided toward the opening 10.

[0048] As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and modifications and additions within the scope not departing from the gist of the present invention are also included in the present invention.

[0049] For example, in the above - mentioned embodiment, as an example of the blowing device, a form in which the air conditioner 1 that generates and sends out air (air - conditioned air) with adjusted temperature and humidity is applied is illustrated. However, the present invention is not limited to this, and as long as it is a blowing device including a fan rotor and a casing, it does not necessarily have to have a function of generating and sending out air with adjusted temperature and humidity.

[0050] In addition, in the above embodiment, the air guide part is exemplified by a form constituted by the guide wall parts 42a to 42c of the three air guide plates 41a to 41c. However, the present invention is not limited to this, and it may be constituted by two or four or more guide wall parts. Further, the guide wall parts 42a, 52a, 42b, 52b, 42c, 52c as the air guide part are constituted by alternately arranging the air guide plates 41a to 41c and the guide wall parts 52a, 52b, 52c in the circumferential direction of the fan rotor 8. However, a plurality of air guide plates 41a to 41c may be continuously arranged in the circumferential direction.

[0051] In addition, in the above embodiment, a form is exemplified in which two of the three air guide plates 41a to 41c constituting the air guide part are installed on the left side of the fan rotor 8 and one air guide plate 41c is installed on the right side of the fan rotor 8. However, the present invention is not limited to this, and two air guide plates 41a, 41b may be installed on the right side and one air guide plate 41c may be installed on the left side. Also, the same number of air guide parts may be installed on the left and right.

[0052] In addition, in the above embodiment, the air guide plates 41a to 41c are exemplified by a form constituted by flat guide wall parts 42a to 42c and attachment wall parts 43a to 43c that bend downward from the front and rear edges of the guide wall parts 42a to 42c. However, the present invention is not limited to this, and the shape and the like can be variously changed, and it may be constituted by a plate-like member having a predetermined plate thickness or the like.

[0053] In addition, in the above embodiment, the guide wall parts 42a to 42c of the air guide plates 41a to 41c are exemplified by a form formed in a flat plate shape. However, the present invention is not limited to this, and for example, it may be formed in a curved shape along a virtual Archimedes curve.

[0054] In the above-described embodiment, the air guiding plates 41a to 41c are illustrated in a form where the inner wall portions 42a to 42c are arranged along a virtual Archimedes curve T with respect to the rotation axis 18a, which is the center of rotation of the fan rotor 8, when viewed from the front. However, the present invention is not limited to this, and the arrangement positions of the air guiding plates 41a to 41c are arbitrary. For example, they may be arranged without following the virtual Archimedes curve T.

[0055] In the above-described embodiment, the rotation axis 18a (center of rotation) of the fan rotor 8 is illustrated in a form where it is arranged at a position slightly eccentric to the left of the central position in the left-right direction in the casing 3. However, the present invention is not limited to this, and the arrangement position of the rotation axis 18a (center of rotation) of the fan rotor 8 is arbitrary. For example, it may be arranged at a substantially central position in the left-right direction in the casing 3.

[0056] In the above-described embodiment, all of the wall portions 31a to 31e are illustrated as being detachable from the housing frame 21, and all of the air guiding plates 41a to 41c are illustrated as being detachable from the wall portions 31a and 31b. However, the present invention is not limited to this, and it is sufficient that at least the wall portion 31e among the wall portions 31a to 31e is detachable from the housing frame 21, and at least the air guiding plate 41c among the air guiding plates 41a to 41c is detachable from the wall portions 31a and 31b.

[0057] In the above-described embodiment, the air guiding plates 41a to 41c are illustrated in a form where they are detachable from the wall portions 31a and 31b. However, the present invention is not limited to this, and any component that constitutes the casing 3 may be used. For example, they may be detachably attached to other wall portions 31c to 31e or the metal frame 21a of the housing frame 21.

[0058] In the above embodiment, an example is shown in which the blower guide plate 41c can be pulled out outward from the right side surface of the casing 3, so that the fan rotor 8 can be pulled out outward from the right side surface. However, the present invention is not limited to this. By making the left blower guide plates 41a and 41b capable of being pulled out outward from the left side surface of the casing 3, the fan rotor 8 may be made capable of being pulled out outward from the left side surface. Further, when the blower guide plates 41a to 41c are arranged in reverse left and right with respect to the fan rotor 8, the blower guide plate 41c may be made capable of being pulled out outward from the left side surface of the casing 3. That is, if the fan rotor 8 and the blower guide plates 41a to 41c can be pulled out in a direction orthogonal to the rotation axis 18a of the drive motor 18 (the circumferential direction of the fan rotor 8), they may be pulled out from any of the front surface, the rear surface, the left side surface, and the right side surface of the casing 3.

Explanation of Signs

[0059] 1 Air conditioner (blower) 2 Housing 3 Casing 5, 6, 10 Opening 8 Fan rotor 13 Fan hopper 14a, 14b Disk 14c Opening 15 Blade plate (blade) 18 Drive motor 18a Rotation axis (rotation center) 19 Coupling 20 Base frame body 21 Housing frame body 31a, 31b Wall portion (structural member) 31c to 31e Wall portion 41a to 41c Blower guide plate 42a to 42c Guide wall portion (blower guide portion) 52a to 52c Guide wall portion (blower guide portion)

Claims

1. A blower device comprising a fan rotor that rotates around a rotation center, and a casing that houses the fan rotor and discharges the air taken into the interior by the rotational centrifugal force of the fan rotor, wherein the casing includes a blower guiding portion that guides the air discharged from the fan rotor in the blowing direction, the blower guiding portion being configured by a wall portion that faces the fan rotor in the radial direction in the casing and a plurality of guiding wall portions that extend in the circumferential direction of the fan rotor inside the wall portion, the blower device being characterized thereby.

2. The blower device according to claim 1, wherein the plurality of guiding wall portions are configured by plate-like members.

3. The blower device according to claim 1, wherein the plurality of guiding wall portions are arranged so as to cover corner portions inside the casing.

4. The blower device according to claim 1, wherein the plurality of guiding wall portions are respectively arranged on the left and right sides of the fan rotor, and a specific guiding wall portion arranged on at least one side of the left and right is detachably attached to a constituent member of the casing.

5. The fan rotor is arranged at a position biased to one side in the left-right direction of the casing, and the specific guiding wall portion is arranged on the other side of the casing, the blower device according to claim 4 being characterized thereby.

6. The blower device according to any one of claims 1 to 5, wherein the plurality of guiding wall portions are arranged along a virtual Archimedes curve extending in the circumferential direction from the rotation center of the fan rotor.

Images