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 technology]

[0002] BACKGROUND ART Conventionally, centrifugal fans such as plug fans have been known as blower devices used for air conditioning and the like in various industrial fields. In these blowers, air is drawn in and released by centrifugal force as multiple blades arranged radially around a center of rotation rotate.

[0003] The fan rotor of this type of blower is housed in a rectangular parallelepiped casing, which allows the direction of the air released from the fan rotor to be changed and supplied to an air intake duct, etc. In addition, there is a device that improves air blowing efficiency by arranging an air blow guide section made of a plate-like member made of a flexible material inside the casing in a roughly U-shape so as to follow a corrected Archimedes curve that is narrower and slopes downward compared to the ideal Archimedes curve (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-125922 A (page 4, figures 2 to 4) Summary of the Invention [Problem to be solved by the invention]

[0005] In the blower device described in Patent Document 1, a single large plate-shaped member is bent into a U-shape and installed along the circumferential direction of the fan rotor, which makes the manufacturing and installation work large-scale and difficult, and also has the problem of high manufacturing costs because the air guide section is made of a plate-shaped member separate from the wall section of the casing.

[0006] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a blower device provided with an air guide portion that is easy to manufacture and install in a casing at low cost. [Means for solving the problem]

[0007] In order to solve the above problem, the blower device of the present invention is A blower including a fan rotor that rotates around a rotation center, and a casing that houses the fan rotor and releases air taken in by the rotational centrifugal force of the fan rotor, the casing includes an airflow guide portion that guides the air discharged from the fan rotor in a blowing direction, The air flow guide portion is characterized by being composed of a wall portion in the casing that faces the fan rotor in the radial direction, and a plurality of guide wall portions that extend circumferentially around the fan rotor inside the wall portion. According to this feature, an air flow guide section extending circumferentially around the fan rotor can be formed using the wall section of the casing and multiple guide wall sections installed inside it, which makes it easier to manufacture and install the air flow guide section, and by utilizing the wall section of the casing, manufacturing costs can be reduced.

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

[0009] The plurality of guide walls are arranged to cover corners inside the casing. According to this feature, the air discharged from the fan rotor can be smoothly guided without accumulating at the corners.

[0010] The plurality of guide wall portions are respectively arranged on the left and right sides of the fan rotor, and a specific guide wall portion arranged on at least one of the left and right sides is detachably attached to a constituent material of the casing. According to this feature, by removing the specific guide wall portion from the component, the fan rotor can be removed to the side, making it easy to replace or perform maintenance work on the fan rotor.

[0011] the fan rotor is disposed at a position offset to one side in the left-right direction of the casing, The specific guide wall portion is characterized by being disposed on the other side of the casing. This feature allows for removal from a large space, improving workability.

[0012] The plurality of guide wall portions are characterized in that they are arranged along an imaginary Archimedes curve extending circumferentially from the center of rotation of the fan rotor. According to this feature, the air discharged from the fan rotor can be efficiently guided. [Brief explanation of the drawings]

[0013] [Figure 1] 1A is a plan view showing an air conditioning apparatus according to an embodiment of the present invention, and FIG. 1B is a left side view thereof. [Figure 2] FIG. 2 is a perspective view showing the internal structure of the casing excluding the drive motor. [Figure 3] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] BB cross-sectional view of FIG. 3. [Figure 5] 10(a) to 10(c) are diagrams illustrating the process of removing the fan rotor from the casing. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A blower according to an embodiment of the present invention will be described below with reference to the accompanying drawings. [Example]

[0015] An air conditioner 1 as an embodiment of the present invention will be described with reference to Figures 1 to 5. Note that Figure 1(a) is a plan view showing the air conditioner, and Figure 1(b) is a left side view showing the air conditioner, and in the following description, the right side of Figures 1(a) and 1(b) will be described as the front side of the air conditioner.

[0016] 1(a) and 1(b), an air conditioning device 1 (hereinafter referred to as air conditioner 1) that serves as a blower that generates and delivers temperature- and humidity-adjusted air (conditioned air) includes a housing 2 having an opening 5 on its flat surface for taking in outside air before conditioning and an opening 6 on its back surface for taking in return air from indoors, and a casing 3 having an opening 10 on its flat surface for taking in conditioned air within the housing 2 and delivering it indoors. The housing 2 and casing 3 are connected via a connector 11, and the interiors of the housing 2 and casing 3 are in communication. Although not specifically shown, ducts are connected to each of the openings 5, 6, and 10.

[0017] The housing 2 has a roughly rectangular parallelepiped shape with an internal space, and each plate except for the bottom plate is made of a sandwich panel with a heat insulating material such as urethane sandwiched between two thin plates. The housing 2 is also equipped with multiple doors that can be opened and closed, allowing workers to enter the interior.

[0018] 1(b), the housing 2 mainly includes an air filter 12 that removes particles such as dust from the air that flows in through the openings 5 ​​and 6, a heat exchanger 7 that includes a cold water coil 7a that cools the air that has passed through the air filter 12 with cold water supplied from outside the apparatus and a hot water coil 7b that heats the air that has passed through the air filter 12 with hot water supplied from outside the apparatus, a humidifier 9 that appropriately humidifies the air that has undergone heat exchange in the heat exchanger 7, and a control panel (not shown) that serves as a control unit that controls various devices provided in the housing 2 and the casing 3. Although not specifically shown, the housing 2 also includes, in addition to the above, pressure gauges that measure the pressures of the air before and after the heat exchange, a hygrometer that measures the humidity of the air that has flowed into the housing 2, a thermometer that measures the temperature of the heat medium before heat exchange, a thermometer that measures the temperature of the heat medium after heat exchange, and a thermometer that measures the temperature of the air after heat exchange. 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 are arranged inside the housing 2.

[0019] 2 to 4, the casing 3 has a base frame 20 made up of multiple metal frames 20a placed on the floor, a storage frame 21 made up of multiple metal frames 21a standing on the upper rear of the base frame 20, and walls 31a to 31e attached to the front, rear, bottom, left, and right sides of the storage frame 21 with screws (not shown) or the like, and is formed in a rectangular parallelepiped shape with an opening 33 on the rear side for taking in conditioned air and an opening 10 on the top side for discharging the conditioned air. The shape of the casing 3 is not limited to a rectangular parallelepiped and can be modified in various ways. The casing 3 may also be installed inside the housing 2.

[0020] A fan rotor 8 is housed inside the casing 3 and is driven to rotate by a drive motor 18 installed outside the casing 3. Also provided inside the casing 3 are air guide plates 41a to 41c that guide air radially emitted from the fan rotor 8 toward an opening 10 above.

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

[0022] The fan rotor 8 is mainly composed of two disks 14a, 14b arranged facing each other in the front and rear, and a plurality of vanes 15 arranged radially around the center of rotation between the disks 14a, 14b. The vanes 15 are provided at approximately equal intervals in the circumferential direction so as to be inclined clockwise (in the rotation direction of the fan rotor 8) toward the outer diameter direction when viewed from the front.

[0023] A coupling 19 is fixed at the center of the front disk 14a for detachable axial attachment to the rotary shaft 18a of the drive motor 18. Meanwhile, an opening 14c is formed in the center of the rear disk 14b, and the front portion of a bell-mouth-shaped fan hopper 13 fixed to the rear wall 31b is slightly inserted into this opening 14c in a non-contact manner. The fan hopper 13 is inserted from the outside into an opening 33 formed in the rear wall 31b, and is detachably attached to the wall 31b via attachment means such as screws (not shown).

[0024] The drive motor 18 is fixed to the top of a motor installation stand 17, which is erected on the front upper part 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 hole 32 formed in the front wall 31a, and the fan rotor 8 is attached to the tip end protruding into the casing 3 via a coupling 19 so as not to rotate relative to the driving motor 18. The fan rotor 8 is directly attached to the rotating shaft 18a of the drive motor 18, but may also be attached indirectly to the rotating shaft 18a via a fan belt or the like.

[0025] 3 and 4, the fan rotor 8 configured in this manner is attached to the rotary shaft 18a of the drive motor 18, which faces the front-rear direction, and is housed within the casing 3, and faces the left side wall 31d, the bottom wall 31c, the right side wall 31e, and the top wall in the radial direction. The fan rotor 8, drive motor 18, airflow guide plates 41a to 41c, and casing 3, etc., form a plug fan (air blower), which is an example of a centrifugal blower.

[0026] 3 and 4, when the drive motor 18 rotates the fan rotor 8 counterclockwise around the rotation shaft 18a, the air taken in from the fan hopper 13 into the fan rotor 8 passes between the blades 15 and is discharged radially outward and counterclockwise when viewed from the front. 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, the amount of air tends to be greater on the right side of the rotation direction (the side on which the blades 15 move upward) than on the left side of the rotation direction (the side on which the blades 15 move downward). Therefore, the rotation shaft 18a (center of rotation) facing the front-rear direction is disposed at a position slightly eccentric to the left of the center position in the left-right direction of the casing 3.

[0027] As shown in Figures 2 to 4, the air guide plates 41a to 41c are made of a metal plate such as stainless steel, and are composed of flat guide wall portions 42a to 42c having a front-to-rear dimension that allows them to be placed between the front and rear wall portions 31a, 31b, and mounting wall portions 43a to 43c that bend downward from the front and rear edges of the guide wall portions 42a to 42c. The air guide plates 41a to 41c may be made of any material, such as synthetic resin. The length of these air guide plates 41a to 41c is shorter 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 mounting walls 43a to 43c, and screw members N1 to N3 attached from the outside to a plurality of mounting holes formed in the front and rear walls 31a, 31b are threaded into the screw holes on both sides of the mounting walls 43a to 43c, thereby enabling the mounting walls 43a to be detachably attached to the front and rear walls 31a, 31b. Note that these mounting walls 43a to 43c may be detachably attached to the walls 31a, 31b by other attachment means, such as latch members, hook-and-loop fasteners, or locking hooks, instead of screw members.

[0029] In this embodiment, the air 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 they may also be attached to the wall portions 31a and 31b by screw members N1 to N3 attached from the inside of the mounting wall portions 43a to 43c.In this way, the air guide plates 41a to 41c can be attached without forming mounting holes for the screw members N1 to N3 through the wall portions 31a and 31b, thereby preventing the air from leaking to the outside.

[0030] 3, air guide plates 41a to 41c are arranged at intervals from one another in the circumferential direction of fan rotor 8 so that guide wall portions 42a to 42c are aligned along an imaginary Archimedes curve T (or a curve approximating the Archimedes curve) based on rotation axis 18a, which is the center of rotation of fan rotor 8, in a front view, preferably overlapping with a tangent to imaginary Archimedes curve T. Furthermore, the distance between the outer end of each blade plate 15 of fan rotor 8 and each guide wall portion 42a to 42c facing blade plate 15 increases in the order of air guide plate 41a, air guide plate 41b, and air guide plate 41c.

[0031] Air flow guide plate 41a has an upper end that defines opening 10 and a lower end that is located on left side wall 31d, and is arranged to cover the upper left corner inside casing 3. Air flow guide plate 41b has an upper end that is located on left side wall 31d and a lower end that is located on bottom wall 31c, and is arranged to cover the lower left corner inside casing 3. Air flow guide plate 41c has an upper end that is located on right side wall 31e and a lower end that is located on bottom wall 31c, and is arranged to cover the lower right corner inside casing 3.

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

[0033] That is, the airflow guide portion that guides air discharged radially outward and counterclockwise from inside fan rotor 8 toward opening 10 is configured by arranging guide walls 42a, 42b, and 42c made up of airflow guide plates 41a to 41c and guide walls 52a, 52b, and 52c made up of walls 31c to 31e alternately from the upstream side to the downstream side in the airflow direction, thereby forming guide walls 42a, 52a, 42b, 52b, 42c, and 52c that are successive in sequence counterclockwise around the circumferential direction of fan rotor 8. Therefore, air inside fan rotor 8 is discharged into a space (see the dotted area in FIG. 3 ) surrounded by guide walls 42a, 52a, 42b, 52b, 42c, and 52c and front and rear walls 31a and 31b.

[0034] Furthermore, these guide walls 42a, 52a, 42b, 52b, 42c, and 52c are arranged so as to be spaced apart successively in the radial direction from rotation axis 18a (center of rotation) of fan rotor 8, and are formed so as to approximate the above-mentioned Archimedes curve T. This allows air discharged from fan rotor 8 to the outside to be efficiently guided by guide walls 42a, 52a, 42b, 52b, 42c, and 52c, thereby improving the static pressure effect compared to when air guide plates 41a to 41c are not provided.

[0035] Furthermore, among the wall portions 31a to 31e that constitute the casing 3, wall portions 31c to 31e that face the radial direction of the fan rotor 8 are used, and multiple airflow guide plates 41a to 41c are installed inside these wall portions, thereby forming an airflow guide portion made up of guide walls 42a, 52a, 42b, 52b, 42c, and 52c that extends circumferentially around the fan rotor 8. This eliminates the need for large-scale installation work such as bending and arranging a single large plate-like member, as in the conventional method, making manufacturing and installation easier, and by using the wall portions 31c to 31e of the casing 3, manufacturing costs can be reduced.

[0036] In addition, when the fan rotor 8 needs to be replaced after long-term use or when maintenance work such as replacing the drive motor 18 or motor bushing (not shown) is to be performed, it can be pulled out from inside the casing 3 to the right side, as shown in Figure 5.

[0037] Specifically, as shown in Figure 5(a), first, the wall portion 31e on the right side of the casing 3 is removed from the housing frame body 21 to open the right side, and then the screw member N3 of the air blower guide plate 41c, which is located on the right side of the fan rotor 8 among the air blower guide plates 41a to 41c, is removed from the front and rear wall portions 31a, 31b, and the air blower guide plate 41c is pulled outward from the right side of the opened housing frame body 21.

[0038] 5(b), rear wall 31b is approached from the housing 2 side, and fan hopper 13 is removed rearward from wall 31b. Note that while fan rotor 8 is supported at a predetermined height by some kind of support means (not shown) to prevent it from falling, coupling 19 is removed from rotating shaft 18a, and fan rotor 8 is slid rearward to a position where it does not interfere with rotating shaft 18a.

[0039] Then, as shown in FIG. 5(c), the fan rotor 8 can be slid to the right while being supported by a support means (not shown), and can be removed to the right from the right side surface of the opened housing frame body 21.

[0040] In this way, the wall 31e on the right side of the casing 3 and the airflow guide plate 41c located to the right of the fan rotor 8 are removably attached to the housing frame 21 and the front and rear walls 31a, 31b. Therefore, even if the airflow guide section is provided inside the casing 3, the fan rotor 8 can be removed to the outside of the casing 3 simply by removing the wall 31e on the right side, which is one side of the casing 3, and the airflow guide plate 41c.

[0041] As described above, the air conditioner 1 as an embodiment of the present invention comprises a fan rotor 8 that rotates around a rotation center, and a casing 3 that houses the fan rotor 8 and releases the air taken in by the rotational centrifugal force of the fan rotor 8, and is provided with an air flow guide section that guides the air released from the fan rotor 8 toward an upper opening 10 (discharge direction), and the air flow guide section is composed of guide wall sections 52a, 52b, 52c made up of wall sections 31c to 31e that radially face the fan rotor 8 in the casing 3, and a plurality of guide wall sections 42a, 42b, 42c that extend circumferentially of the fan rotor 8 inside the wall sections 31c to 31e.

[0042] This allows the wall portions 31c to 31e of the casing 3 and the multiple guide wall portions 42a, 42b, 42c arranged inside thereof to form an air flow guide portion extending circumferentially around the fan, thereby facilitating the manufacturing and installation of the air flow guide plates 41a to 41c that form the air flow guide portion, and by utilizing the wall portions 31c to 31e of the casing 3, manufacturing costs can be reduced.

[0043] Furthermore, the guide walls 42a, 42b, 42c are made up of air guide plates 41a-41c made of flat metal members, which makes it easy to manufacture the guide walls 42a, 42b, 42c. Furthermore, the air guide plates 41a-41c are smaller and lighter than the walls 31a-31e, making them easier to handle than air guides made up of a single plate-like member.

[0044] In addition, the multiple guide wall portions 42a, 42b, 42c are installed to cover the upper left corner, lower left corner, and lower right corner inside the casing 3, thereby allowing the air released from the fan rotor 8 to be smoothly guided without stagnating in the corners.

[0045] Furthermore, the plurality of guide walls 42a, 42b, 42c are respectively arranged on the left and right sides of the fan rotor 8, and guide wall 42c, which serves as a specific guide wall arranged on one of the left and right sides (the right side in this example), is detachably attached by screw members N3 to walls 31a, 31b, which are components of the casing 3. This makes it possible to remove the fan rotor 8 to the right side of the casing 3 by removing guide wall 42c from walls 31a, 31b, facilitating replacement and maintenance of the fan rotor 8.

[0046] Furthermore, fan rotor 8 is positioned to the left in the left-right direction of casing 3, and guide wall 42c, which serves as the specific guide wall, is positioned on the right side of casing 3, so that it can be removed from a large space, improving workability. In other words, the space is larger on the downstream side in the airflow direction, and only one airflow guide plate 41c needs to be removed, improving workability, and because the airflow guide plate 41c that is located farthest radially from fan rotor 8 among airflow guide plates 41a to 41c is removed, it is possible to prevent damage to fan rotor 8 from coming into contact with it during the installation and removal work.

[0047] Furthermore, the multiple guide wall portions 42a to 42c are arranged so as to follow an imaginary Archimedes curve T extending circumferentially from the center of rotation of the fan rotor 8, thereby enabling the air released from the fan rotor 8 to be efficiently guided toward the opening 10.

[0048] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

[0049] For example, in the above embodiment, an example of a blower device is shown in which an air conditioning device 1 is applied that generates and sends out temperature and humidity adjusted air (conditioned air), but the present invention is not limited to this, and as long as the blower device has a fan rotor and a casing, it does not necessarily have to have the function of generating and sending out temperature and humidity adjusted air.

[0050] In the above embodiment, the air guide portion is configured by guide wall portions 42a-42 of three air guide plates 41a-41c, but the present invention is not limited to this and may be configured by two or four or more guide wall portions. Furthermore, guide wall portions 42a, 52a, 42b, 52b, 42c, 52c as the air guide portion are configured by air guide plates 41a-41c and guide wall portions 52a, 52b, 52c being arranged alternately in the circumferential direction of fan rotor 8, but multiple air guide plates 41a-41c may be arranged consecutively in the circumferential direction.

[0051] In the above embodiment, two of the three air guide plates 41a to 41c constituting the air guide section, 41a and 41b, 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 and 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 sections may be installed on the left and right sides.

[0052] In addition, in the above embodiment, the air guide plates 41a to 41c are exemplified as being composed of flat guide wall portions 42a to 42c and mounting wall portions 43a to 43c that bend downward from the front and rear edges of the guide wall portions 42a to 42c, but the present invention is not limited to this, and the shapes etc. can be changed in various ways, and the plates may be composed of plate-like members etc. having a predetermined plate thickness.

[0053] In addition, in the above embodiment, the guide wall portions 42a to 42c of the air blower guide plates 41a to 41c are exemplified as being formed in a flat plate shape, but the present invention is not limited to this, and for example, they may be formed in a curved shape so as to follow a virtual Archimedes curve.

[0054] In addition, in the above embodiment, the air flow guide plates 41a to 41c are exemplified as being arranged so that the guide wall portions 42a to 42c are aligned along a virtual Archimedes curve T based on 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 flow guide plates 41a to 41c are arbitrary, and for example, they may be arranged not along the virtual Archimedes curve T.

[0055] In addition, in the above embodiment, the rotation axis 18a (rotation center) of the fan rotor 8 is exemplified as being positioned slightly off-center to the left of the center position in the left-right direction of the casing 3, but the present invention is not limited to this, and the position of the rotation axis 18a (rotation center) of the fan rotor 8 is arbitrary, and for example, it may be positioned at approximately the center position in the left-right direction of the casing 3.

[0056] Furthermore, in the above embodiment, an example was given in which all of the wall portions 31a to 31e are detachable from the storage frame body 21, and all of the air blowing guide plates 41a to 41c are detachable from the wall portions 31a, 31b, but the present invention is not limited to this, and it is sufficient that at least the wall portion 31e of the wall portions 31a to 31e is detachable from the storage frame body 21, and it is sufficient that at least the air blowing guide plate 41c of the air blowing guide plates 41a to 41c is detachable from the wall portions 31a, 31b.

[0057] In addition, in the above embodiment, the air guide plates 41a to 41c are detachably attached to the wall portions 31a, 31b, but the present invention is not limited to this, and they may be any constituent material that makes up the casing 3, and for example, they may be detachably attached to other wall portions 31c to 31e or the metal frame 21a of the accommodating frame body 21.

[0058] In the above embodiment, the fan rotor 8 can be extracted outward from the right side surface of the casing 3 by making the airflow guide plate 41c retractable outward from the right side surface. However, the present invention is not limited to this. The left airflow guide plates 41a, 41b can be extracted outward from the left side surface of the casing 3, by making the left side airflow guide plates 41a, 41b retractable outward from the left side surface of the casing 3. In addition, if the airflow guide plates 41a to 41c are arranged in reverse with respect to the fan rotor 8, the airflow guide plate 41c can be extracted outward from the left side surface of the casing 3. In other words, the fan rotor 8 and the airflow guide plates 41a to 41c can be extracted from any of the front, rear, left side, and right side surfaces of the casing 3, as long as they are retractable in a direction perpendicular to the rotation shaft 18a of the drive motor 18 (the circumferential direction of the fan rotor 8). [Explanation of symbols]

[0059] 1. Air conditioning equipment (blower) 2. Case 3 Casing 5,6,10 Openings 8 Fan rotor 13 Fun Hopper 14a, 14b disc 14c opening 15 Slats (Slats) 18 Drive motor 18a Rotation axis (center of rotation) 19 Coupling 20 Base frame 21 Storage frame body 31a, 31b Wall (constituent material) 31c~31e Wall part 41a~41c Ventilation guide board 42a to 42c: Guide wall portion (air blow guide portion) 52a to 52c: Guide wall portion (airflow guide portion)

Claims

1. A blower including a fan rotor that rotates around a rotation center, and a casing that houses the fan rotor and releases air taken in by the rotational centrifugal force of the fan rotor, the casing includes an airflow guide portion that guides the air discharged from the fan rotor in a blowing direction, The air blower device is characterized in that the air guide section is composed only of a flat wall section inside the casing that faces the fan rotor in the radial direction, and a plurality of guide wall sections that are flat plate-shaped members that extend circumferentially around the fan rotor inside the wall section, and the plurality of guide wall sections are arranged to cover the corners inside the casing excluding the wall section.

2. The blower device according to claim 1, characterized in that the plurality of guide wall portions are respectively arranged on the left and right sides of the fan rotor, and a specific guide wall portion arranged on at least one of the left and right sides is detachably attached to a component of the casing.

3. the fan rotor is disposed at a position offset to one side in the left-right direction of the casing, The blower device according to claim 2 , wherein the specific guide wall portion is disposed on the other side of the casing.

4. 4. The blower device according to claim 1, wherein the plurality of guide walls are arranged along an imaginary Archimedes curve extending circumferentially from the center of rotation of the fan rotor.

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