JPH05126088A - Cross flow fan and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a cross flow fan which has two suction openings and a supply opening and can cool two objects at the same time. CONSTITUTION:An impeller 7 is formed by disposing many blade piece 2 like a cylinder and horizontally located. The both ends of the impeller are rotatively supported by a pair of side plates 8a, 8b. An upper guide plate 11 and lower guide plates 12a, 12b which are adjacent to the upper and lower parts of the outer periphery of the impeller 7 respectively and form a suction area 19 and a supply area 20 on both sides of the impeller 7 are provided at the top and bottom of the impeller 7. A supply opening 22 is formed by the upper guide plate 11, the lower guide plates 12a, 12b, and the side plates 8a, 8b on the supply area 20 side while a first suction opening 21 is formed by the upper guide plate 11, the lower guide plates 12a, 12b, and the side plates 8a, 8b on the suction area 21 side. Moreover, a second suction opening 24 is formed by providing an opening between the guide plates 12a, 12b so that the opening is located near the outer periphery part of the impeller 7 which transfers air to the supply area 20 front the suction area 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow blower which has a wide range of air outlets and suction ports and sends a stable laminar air flow.

[0002]

2. Description of the Related Art Generally, a large number of blade pieces are arranged in a cylindrical shape to form an impeller, the impeller is arranged horizontally, and both ends thereof are rotatably supported by a pair of side plates. There is known a cross-flow blower provided with an upper guide plate and a lower guide plate that form a suction region and a blowout region on both sides of an impeller above and below.

9 and 10 show a conventional cross-flow blower. Of these, FIG. 9 shows the front of the conventional cross-flow blower, and FIG. 10 shows the side cross-section of the conventional cross-flow blower. In this conventional cross-flow fan 51, a large number of blade pieces 52 are connected to a plurality of fan plates 53a, 53b, 53c.
Has an impeller 54 supported in a cylindrical shape. The impeller 54 has a shaft 55 on a fan plate 53a at one end, and a rubber bush 56 is fitted on a fan plate 53c at the other end. The impeller 54 is disposed between the pair of side plates 57a and 57b, and the shaft 55
Is rotatably supported by one side plate 57a via a bearing 58. The rubber bush 56 is connected to a rotary shaft of a motor 58 fixed to the side plate 57b. An upper guide plate 5 is provided above and below the impeller 54, respectively.
9 and a lower guide plate 60 are provided. The upper guide plate 59 and the lower guide plate 60 are provided substantially horizontally and are close to the outer peripheral surface of the impeller 54 at the central portion. In a part of the upper guide plate 59, as shown in FIG.
A stabilizer 61 is formed near the outer peripheral surface of the impeller 54. The center part of the lower guide plate 60 is the impeller 54.
Is curved along the outer peripheral surface of.

In FIG. 10, when the impeller 54 rotates in the direction R, the cross-sectional area formed by the lower guide plate 60 in the suction region 62 on the right side of the impeller 54 and the outer circumference of the impeller 54 gradually decreases. , Air is blade piece 5 of impeller 54
It is taken in between the two, is given a dynamic pressure by the blade piece 52, and is conveyed to the blowing area 63 on the right side of the impeller 54,
It is taken out to the blowout area 63 by the stabilizer 61. By rotating the impeller 54 in the direction R in this manner, the air continuously flows from the suction region 62 to the blowing region 63, as shown by the arrow W. Guide plate 5 for suction area 62
The opening formed by 9, 60 and the side plates 57a, 57b forms the suction port 64 of the cross flow fan 51, while the opening formed by the guide plates 59, 60 and the side plates 57a, 57b in the blowout area 63 is Outlet port 65 of the cross flow fan 51
To form.

FIG. 11 schematically shows a copying machine using a conventional cross flow fan. The copying machine 66 using the conventional cross flow fan 51 has, for example, two high temperature cooled objects 6 inside.
7 and 68, the cross-flow blower 51 is provided in the vicinity of each of the objects to be cooled, and each of the objects to be cooled 67, 68 is provided as shown in FIG.
Need to be individually cooled.

[0006]

However, since the above-mentioned conventional cross-flow fan has only one air outlet and one air inlet, it cools, for example, two objects to be cooled as described above. If you had to have two cross-flow fans. For the purpose of cooling, this often results in excessive capital investment, which causes a problem that the entire apparatus provided with the cross flow fan becomes uneconomical. In addition, the conventional cross-flow fan is provided with a complicated upper guide plate and a lower guide plate above and below the impeller, and a stabilizer for converting the dynamic pressure of air into static pressure is formed in part of the upper guide plate. Therefore, the structure is complicated and the manufacture is difficult. Further, the conventional cross-flow blower has an eccentricity between the shaft of the impeller and the rotation axis of the impeller, and a deviation of the dimension in the rotation axis direction between the fan plate fixing the blade piece and the surface orthogonal to the rotation axis of the impeller. As a result, when the impeller rotated at high speed, vibration increased. This is a particularly serious problem in a cross-flow fan that rotates an impeller at a high speed because it needs to cool a high-temperature cooled object in a small space like a cross-flow fan used in recent OA equipment. Therefore, an object of the present invention is to provide a cross-flow blower that has two suction ports and one blow-out port and can cool two objects to be cooled simultaneously by one cross-flow blower. Another object of the present invention is to provide a cross-flow blower that can exhibit the same performance as a conventional cross-flow blower with a small number of parts and a simple structure. Still another object of the present invention is to provide a method for manufacturing a cross flow fan that reduces vibration during high speed rotation.

[0007]

In order to achieve the above object, a cross-flow fan according to the present invention has a large number of blade pieces arranged in a cylindrical shape to form an impeller, and the impeller is arranged horizontally. Both ends are rotatably supported by a pair of side plates,
An upper guide plate and a lower guide plate that form a suction region and a blow region on both sides of the impeller are provided above and below the impeller, respectively, near the upper and lower portions of the outer peripheral surface of the impeller, and on the blow region side. An air outlet is formed by the upper guide plate, the lower guide plate, and the side plate, and a first suction port is formed by the upper guide plate, the lower guide plate, and the side plate on the suction region side, and air is transferred from the suction region to the blowing region. The second suction port is formed by providing an opening in the guide plate on the outer peripheral portion of the impeller.

Another cross-flow fan according to the present invention constitutes a cylindrical impeller body by supporting a large number of blade pieces with a plurality of fan plates, and a shaft projecting outward at one end of the impeller body. And a rubber bush is fitted to the other end of the impeller body to form an impeller, and the impeller is arranged between a pair of opposing side plates, and one of the side plates inserts the shaft of the impeller through a bearing. Rotatably supported, the motor is fixed to the other side plate, the rotation shaft of the motor is connected to the rubber bush of the impeller, and a part of the outer peripheral surface of the impeller is curved around the impeller. A guide plate is provided in the surrounding portion and in the curved portion, which is close to the outer peripheral surface of the impeller, and the dynamic pressure of the air carried by the impeller is applied to a position near the outer peripheral surface of the impeller facing the guide plate with the impeller interposed. A stabilizer for converting to static pressure is provided. And it is characterized in and.

Further, in the method for manufacturing a cross flow fan according to the present invention, a large number of blade pieces are supported by a plurality of fan plates to form a cylindrical impeller body, and one end of the impeller body projects outward. A shaft is provided, and a rubber bush is fitted to the other end of the impeller body to form an impeller. The eccentric dimension of the rotary shaft of the impeller and the shaft is measured, and the eccentric dimension becomes less than a predetermined value. After adjusting the shaft as described above, the impeller is rotatably arranged between the pair of side plates facing each other, and the guide plate is almost attached to the periphery of the impeller. A feature is that the cross-flow blower is completely assembled after measuring the deviation of the dimension in the direction of the rotation axis from the plane orthogonal to the rotation axis and adjusting the mounting position of the impeller so that the deviation of the dimension becomes a predetermined value or less. To do.

[0010]

In the cross flow fan of the present invention having the above two suction ports, a cylindrical impeller composed of a large number of blade pieces is rotatably supported horizontally by a pair of side plates, and above and below the impeller, An upper guide plate and a lower guide plate that form a suction region and a blow region are provided on both sides of the impeller, and a first suction port is formed by the upper guide plate, the lower guide plate, and the side plate on the suction region side, and blows out from the suction region. Since the second suction port is formed by providing the opening portion in the guide plate on the outer peripheral portion of the impeller for transferring the air to the region, the air is rotated by the rotation of the impeller so that the air becomes
At the same time as being taken in through the suction port, it is taken in through the second suction port. As a result, high-temperature air containing the heat of the object to be cooled is sucked from the first inlet of the cross-flow fan, low-temperature outside air is taken in from the second suction port, and these air are mixed inside the cross-flow blower. If a relatively low temperature air is blown toward the object to be cooled, it is possible to cool the two objects to be cooled at the same time by one cross flow fan.

Another cross-flow fan according to the present invention rotatably horizontally supports a cylindrical impeller composed of a large number of blade pieces by a pair of side plates, and in the vicinity of the impeller,
A guide plate is provided that is curved and surrounds a part of the outer circumference of the impeller, and a curved portion is provided with a guide plate that is close to the outer peripheral surface of the impeller, and is located near the outer peripheral surface of the impeller that faces the guide plate with the impeller interposed. ,
Since the stabilizer is provided, the suction region and the blowout region are formed on both sides of the guide plate and the stabilizer by the rotation of the impeller, and it is not necessary to provide the upper guide plate and the lower guide plate having a complicated shape. This makes it possible to obtain a small cross-flow blower having a simple structure.

Further, in the method for manufacturing a cross-flow fan according to the present invention, during the manufacturing process of the cross-flow fan, a step of adjusting the shaft so that the eccentricity of the rotary shaft of the impeller and the shaft of the impeller is below a predetermined value. And the step of adjusting the mounting position of the impeller so that the dimensional deviation in the direction of the rotation axis between the outer peripheral portion of the fan plate and the plane orthogonal to the rotation axis of the impeller becomes a predetermined value or less. The vibration of the cross flow fan during high rotation due to an error in the assembly dimensions is suppressed. By this,
By rotating a small cross-flow blower at a high speed to increase the amount of blown air, it is possible to cool a high-temperature cooled object.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded view of a cross flow fan having two suction ports according to the present invention. In the figure, a cross flow fan 1 has an impeller body 4 in which a large number of blade pieces 2 are cylindrically held by a plurality of circular fan plates 3. The impeller body 4 has a shaft 5 protruding outward at one end and a rubber bush 6 at the other end. The impeller main body 4, the shaft 5, and the rubber bush 6 constitute an impeller 7. The impeller 7 is arranged between a pair of opposing side plates 8a and 8b. The shaft 5 of the impeller 7 is rotatably supported by one side plate 8 a via a bearing 9. The motor 10 is fixed to the side surface of the other side plate 8b. The rotation shaft of the motor 10 is connected to the rubber bush 6 of the impeller 7. A part of the impeller 7 is located above the impeller 7.
An upper guide plate 11 is disposed in the vicinity of the outer peripheral surface of the upper part of the above, and both sides of the upper guide plate 11 in the rotation axis direction of the impeller 7 are fixed to the side plates 8a and 8b, respectively. A lower guide plate 12 is disposed below the impeller 7 and partially close to the lower outer peripheral surface of the impeller 7. The lower guide plate 12 is composed of a first lower guide plate 12a and a second lower guide plate 12b. The first lower guide plate 12
The second guide plate 12a and the second lower guide plate 12b are arranged in the vicinity of the lower peripheral surface of the impeller 7 with a gap. Both sides of the first lower guide plate 12a and the second lower guide plate 12b in the rotation axis direction of the impeller 7 are fixed to the side plates 8a and 8b, respectively. A stabilizer 13 for converting the dynamic pressure of the air carried by the blade pieces 2 of the impeller 7 into static pressure is provided on a part of the upper guide plate 11.

FIG. 2 shows a side sectional view of the cross flow fan 1. As shown in FIG. 2, an upper guide plate 11 is provided above the impeller 7, and lower guide plates 12a and 12b are provided below.
Is provided. A stabilizer 13 that converts the dynamic pressure of the air carried by the blade pieces 2 of the impeller 7 into static pressure is provided on a part of the upper guide plate 11. The lower guide plate 12 includes a first lower guide plate 12a and a second lower guide plate 12
It is divided into b. The first lower guide plate 12a and the second lower guide plate 12b are fixed at a position close to the lower portion of the outer peripheral surface of the impeller 7 with a gap.

The method of manufacturing the cross flow fan 1 of the present invention is as follows.
In order to suppress the vibration of the cross flow fan 1 during high-speed rotation, a step of adjusting the eccentricity between the shaft 5 of the impeller 7 and the rotating shaft of the impeller 7 during the conventional assembling process, the fan plate 3 and the blades. And a step of adjusting the dimensional deviation in the direction of the rotation axis from the plane orthogonal to the rotation axis of the vehicle 7. FIG. 3 shows one step of a method of manufacturing the cross flow fan 1 for adjusting the eccentricity of the shaft 5. The impeller body 4 has a large number of blade pieces 2
These blade pieces 2 are held in a cylindrical shape by a plurality of circular fan plates 3. A shaft 5 is erected on a fan plate 3d forming one end surface of the impeller body 4. Further, a rubber bush 6 is fitted to the fan plate 3a forming the other end surface of the impeller body 4. The impeller 7 is set in the measuring device 14 after being assembled. The measuring device 14 includes a base 15, a support member 16 and a support 17 provided on the upper surface of the base 15.
It is configured by a temporary shaft 18 rotatably provided on the support base 17. As shown in FIG. 3, the shaft 5 of the impeller 7 is rotatably supported by the support member 16, and the rubber bush 6 is fitted in the temporary shaft 18. After setting the impeller 7 on the measuring device 14 as described above, the impeller 7 is rotated, and at the point A shown in FIG.
The eccentricity between the shaft 5 and the rotating shaft of the impeller 7 is measured with a dial gauge or the like. In this embodiment, the eccentricity is 30
The shaft 5 is adjusted so that it is equal to or less than μm.

FIG. 4 shows one step of a method of manufacturing the cross flow fan 1 in which the mounting of the impeller 7 is adjusted. Impeller 7
Is installed between the side plates 8a and 8b, and the upper guide plate 11, the stabilizer 13, and the first lower guide plate 1 are provided on the outer periphery of the impeller 7.
After attaching 2a and 2a, at a point B shown in FIG. 4, a diametrical deviation λ between the outer peripheral portion of the fan plate 3a and the plane orthogonal to the rotation axis of the impeller 7 is measured by a dial gauge or the like. In this embodiment, the fan plate 3
The mounting angle of the impeller 7 is adjusted so that the deviation λ of the dimension of a in the direction of the rotation axis is 150 μm or less. After adjusting the mounting angle of the impeller, the second lower guide plate 12b is mounted, and the assembly of the cross flow fan 1 is completed.

Next, the operation of the cross flow fan 1 of the present invention will be described below based on the structure and manufacturing method of the cross flow fan 1 of the present invention. The impeller 7 of the cross flow fan 1 of this embodiment is rotationally driven in the direction R shown in FIG. In this case, the area on the right side of the impeller 7 in FIG. 2 forms the suction area 19, and the area on the left side of the impeller 7 forms the blowout area 20. Impeller 7 of cross flow fan 1
When R rotates in the direction R, the air in the suction region 19 is taken in between the blade pieces 2 in the space formed between the impeller 7 and the first lower guide plate 12a in which the cross-sectional area gradually decreases. As a result, the low static pressure air in the suction region 19 is given a dynamic pressure by the blade pieces 2 and is carried to the blowout region 20. The air carried to the blowout region 20 is taken out to the blowout region 20 by the action of the centrifugal force and the stabilizer 13. At this time, the dynamic pressure of the air given by the blade piece 2 is converted into a high static pressure in the blowout region 20. By continuously rotating the impeller 7 in the direction R in this manner, the air is sucked into the suction region 1 as shown by an arrow W in FIG.
9 to the blowout area 20 continuously. Suction area 19
Side upper guide plate 11, lower guide plate 12, and side plates 8a, 8b
The air intake port formed by and constitutes the first suction port 21 of the cross flow fan 1, while it is formed by the upper guide plate 11, the lower guide plate 12, and the side plates 8a, 8b on the blowout region 20 side. The air outlet constitutes the outlet 22 of the cross flow fan 1. The cross flow fan 1 of this embodiment is shown in FIG.
As shown in, there is a gap between the first lower guide plate 12a and the second lower guide plate 12b. Further, the edge of the second lower guide plate 12b which is in contact with the gap is folded back at an acute angle to form the tongue portion 23. The tongue portion 23 and the outer peripheral surface of the impeller 7 form a space whose cross-sectional area gradually decreases. The air in this space is taken in between the blade pieces 2 of the impeller 7 as the impeller 7 rotates, and is taken out to the blowout region 20. Along with this, new air flows into the gap between the first lower guide plate 12a and the second lower guide plate 12b. Thus, this gap constitutes the second suction port 24 of the cross flow fan 1.

FIG. 5 schematically shows a case where the cross flow fan 1 of the present invention is used in a copying machine. The cross-flow fan 1 of the present invention is mounted at an appropriate position between the two objects to be cooled 26, 27 inside the copying machine 25. In the copying machine 25, the heat generated by the first cooled object 26 is sucked through the first suction port 21 of the cross flow fan 1 to cool the first cooled object 26. The second suction port 24 communicates with the external space of the copying machine 25 by a duct or the like, and sucks low temperature outside air from the second suction port 24. The high temperature air sucked from the first suction port 21 and the low temperature air sucked from the second suction port 24 are mixed to become a relatively low temperature air, and the second cooled object 27 is blown from the blowout port 22. To the second object 27 to be cooled. As described above, by using the cross flow fan 1 of this embodiment, it is possible to cool two objects to be cooled at the same time with one cross flow fan. In addition, as described above, the cross-flow fan of the present invention has a step of adjusting the eccentricity of the shaft and the deviation of the dimension of the fan plate in the axial direction of the impeller during the manufacturing process. The increase can be suppressed.

FIG. 6 shows vibration accelerations of a conventional cross-flow fan and a cross-flow fan according to the present invention in comparison. In the graph of FIG. 6, the eccentricity of the shaft is 30 μm to 60 μm, and the deviation of the fan plate size is 30 μm to 230 μm.
It is shown by comparing with an average value of 10 lateral flow fans according to the manufacturing method of the present invention in which the deviation of the dimension of the fan plate is 150 μm or less. As shown in FIG. 6, in the cross flow blower manufactured by the conventional manufacturing method, the vibration acceleration sharply increases at the number of rotations exceeding 3500 rpm. On the other hand, in the cross flow fan according to the present invention, the vibration acceleration gradually increases even at the number of revolutions exceeding 3500 rpm. The vibration acceleration of 0.3 G indicated by the one-dot chain line in the figure indicates the allowable range of the vibration acceleration. As is clear from the figure, the cross-flow fan according to the present invention is within the permissible range of the vibration acceleration of 0.3 G even at the high speed rotation exceeding 4000 rpm, and can be sufficiently used for actual use.

7 and 8 show a simple structure
1 shows a cross-flow blower that produces the same performance as a conventional cross-flow blower. FIG. 7 is a perspective view of the cross-flow blower according to this embodiment, and FIG. 8 shows the cross-flow blower partially cut away from the front. The cross flow fan 31 has a cylindrical impeller body 32. The impeller body 32 has a large number of blade pieces 33. The blade piece 33 is supported by a plurality of circular fan plates 34a, 34b, 34c, 34d. A shaft 35 is erected on a fan plate 34d at one end of the impeller body 32, and a rubber bush 36 is fitted on a fan plate 34a at the other end. The entire impeller 37 is composed of the impeller body 32, the shaft 35, and the rubber bush 36. The impeller 37 is arranged between a pair of opposed side plates 38a and 38b, the shaft 35 is rotatably supported by one side plate 38a via a bearing 39, and the rubber bush 36 is fixed to the other side plate 38b. Is connected to the rotating shaft of the motor 40. A guide plate 41 and a stabilizer 42, which form a suction region and a blow region, are attached to both sides of the outer peripheral surface of the impeller 37 at positions separated from each other. The guide plate 41 is curved so as to surround the lower surface and the back surface of the impeller, and is close to the outer peripheral surface of the impeller 37 at the curved portion. The guide plate 41 is fixed to the side plates 38a and 38b on both sides of the impeller 37 in the axial direction. On the other hand, the stabilizer 42 is arranged to face the curved portion of the guide plate 41 with the impeller 37 interposed.

With such a configuration, the impeller 37 is shown in FIG.
The opening formed between the stabilizer 42 and the vertical upper end of the guide plate 41 forms a suction port 43 when rotating in the direction R shown in FIG. The opening formed in forms the outlet 44. In this cross-flow fan 31, the impeller 37 has the direction R.
When rotating, the air is sucked from the suction port 43 in the upper portion of the cross flow fan 31 and blown out from the blow-out port 44 in front of the cross flow fan 31.

According to the cross flow fan 31 of this embodiment, since the air flow path can be formed by the guide plate 41 and the stabilizer 42 each having a simple shape, the structure is simplified as compared with the conventional cross flow fan. This makes it possible to obtain a compact and economical cross-flow blower.

[0023]

As is apparent from the above description, in the cross flow fan of the present invention having the above-mentioned two suction ports, the cylindrical impeller composed of a large number of blade pieces is rotatably supported horizontally by the pair of side plates. An upper guide plate and a lower guide plate that form a suction region and a blowout region are provided on both sides of the impeller above and below the impeller, and the blowout port is formed by the upper guide plate, the lower guide plate, and the side plate on the blowout region side. And a first suction port is formed by the upper guide plate, the lower guide plate and the side plate on the suction area side, and an opening is provided in the guide plate on the outer peripheral portion of the impeller for transferring air from the suction area to the blowout area. Since the second suction port is formed as a result, the air is not
At the same time as being taken in through the suction port, it is taken in through the second suction port. As a result, high-temperature air containing the heat of the object to be cooled is sucked from the first inlet of the cross-flow fan, low-temperature outside air is taken in from the second suction port, and these air are mixed inside the cross-flow blower. If a relatively low temperature air is blown toward the object to be cooled, it is possible to cool the two objects to be cooled at the same time by one cross flow fan. By using this cross-flow blower, for example, recent OA
It is possible to efficiently cool a device such as a device in which many high temperature parts are arranged in a small space.

Further, another cross-flow fan according to the present invention is curved around the impeller rotatably supported so as to surround a part of the outer periphery of the impeller, and the curved portion is close to the outer peripheral surface of the impeller. A guide plate is provided, and a stabilizer for converting the dynamic pressure of the air carried by the impeller into static pressure is provided at a position near the outer peripheral surface of the impeller facing the guide plate with the impeller interposed. The guide plate and the stabilizer form a suction region and a blow region on both sides of the impeller when the impeller rotates. That is, the conventional upper guide plate and lower guide plate that form the suction region and the blowout region can be omitted, and a cross-flow blower having a simple structure and a small space can be obtained.

Further, in the method for manufacturing a cross-flow fan according to the present invention, a step of adjusting the shaft so that the eccentricity between the rotary shaft of the impeller and the shaft of the impeller is below a predetermined value during the manufacturing process of the cross-flow fan. And the step of adjusting the mounting position of the impeller so that the dimensional deviation in the direction of the rotation axis between the outer peripheral portion of the fan plate and the plane orthogonal to the rotation axis of the impeller becomes a predetermined value or less. The vibration of the cross flow fan during high rotation due to an error in the assembly dimensions is suppressed. By this,
It is possible to obtain a cross-flow blower that generates a large amount of air by high-speed rotation.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a cross flow fan of the present invention.

FIG. 2 is a side sectional view of the cross flow fan of the present invention.

FIG. 3 is a schematic view showing one step of a method of manufacturing a cross flow fan of the present invention for adjusting a shaft.

FIG. 4 is a schematic view showing one step of the method for manufacturing the cross flow fan of the present invention, which adjusts the mounting angle of the impeller.

FIG. 5 is a schematic view showing a copying machine using the cross flow fan of the present invention.

FIG. 6 is a graph showing a comparison between vibration acceleration of a cross-flow fan manufactured by the manufacturing method of the present invention and vibration acceleration of a cross-flow fan manufactured by a conventional manufacturing method.

FIG. 7 is a perspective view showing another cross-flow fan according to the present invention.

FIG. 8 is a front view showing another cross-flow fan according to the present invention.

FIG. 9 is a front view showing a conventional cross-flow blower.

FIG. 10 is a side sectional view showing a conventional cross-flow blower.

FIG. 11 is a schematic view showing a copying machine using a conventional cross-flow fan.

[Explanation of symbols]

 1 Cross Flow Fan 2 Blade Piece 3 Fan Plate 4 Impeller Main Body 5 Shaft 6 Rubber Bushing 7 Impeller 8a Side Plate 8b Side Plate 9 Bearing 10 Motor 11 Upper Guide Plate 12 Lower Guide Plate 13 Stabilizer 19 Suction Area 20 Blow-out Area 21 First Suction Port 22 Blow-out port 24 Second suction port 31 Cross-flow fan 32 Impeller body 33 Blade piece 34 Fan plate 35 Shaft 36 Rubber bush 37 Impeller 38a Side plate 38b Side plate 39 Bearing 40 Motor 41 Guide plate 42 Stabilizer

Claims (3)

[Claims] 1. An impeller is formed by arranging a large number of blade pieces in a cylindrical shape, the impeller is arranged horizontally, and both ends thereof are rotatably supported by a pair of side plates. , The upper guide plate and the lower guide plate, which form the suction area and the blowout area on both sides of the impeller, respectively, are provided near the upper and lower parts of the outer peripheral surface of the impeller, and the upper guide plate and the lower part on the blowout area side. The guide plate and the side plate form an outlet, the upper guide plate on the suction region side, the lower guide plate and the side plate form a first suction port, and the outer circumference of the impeller transfers air from the suction region to the blow region. A cross-flow blower, characterized in that an opening is provided in a part of the guide plate to form a second suction port. 2. A cylindrical impeller body is constructed by supporting a number of blade pieces with a plurality of fan plates, a shaft projecting outward is provided at one end of the impeller body, and the other end of the impeller body is provided. A rubber bush is fitted to the to form an impeller, the impeller is arranged between a pair of opposing side plates, and one side plate rotatably supports the shaft of the impeller through a bearing, and the other side plate. The motor is fixed to the side plate, the rotation shaft of the motor is connected to the rubber bush of the impeller, and the curving surrounds a part of the outer peripheral surface of the impeller, around the impeller.
A guide plate is provided in the curved portion close to the outer peripheral surface of the impeller, and the dynamic pressure of the air carried by the impeller is statically applied to a position near the outer peripheral surface of the impeller facing the guide plate with the impeller interposed. A cross-flow blower that is equipped with a stabilizer that converts into a. 3. A cylindrical impeller body is constructed by supporting a number of blade pieces with a plurality of fan plates, a shaft projecting outward is provided at one end of the impeller body, and the other end of the impeller body is provided. A rubber bush is fitted on the impeller to form an impeller, the eccentric dimension of the rotating shaft of the impeller and the shaft is measured, and the shaft is adjusted so that the eccentric dimension is below a predetermined value. Is rotatably disposed between a pair of facing side plates, and a guide plate is substantially attached to the periphery of the impeller, and a rotation axis of the outer peripheral portion of the fan plate and a surface orthogonal to the rotation axis of the impeller. A method for manufacturing a cross-flow fan, comprising: measuring a size deviation in a direction, adjusting a mounting position of an impeller such that the size deviation is a predetermined value or less, and then completely assembling the cross-flow fan.