JPH0647698U - Centrifugal blower with flexible outlet - Google Patents

Abstract

(57) [Summary] [Purpose] To change the air outlet in any direction and maintain it so that the wind can be applied from the desired direction and the entire blower can be carried as a unit. A casing 5 has a cylindrical outer shape, a base body 6 for supporting the central axis N of the casing 5 horizontally is provided, and a motor and a fan 2 are arranged substantially concentrically with respect to the casing 5. deep. The casing 5 is placed on the support rollers 11 and 11 mounted on the base body 6, and the direction of the blow-off cylinder 4 can be easily changed by lightly turning the casing 5 by hand. The outlet 16 can change direction within a range of about 230 degrees, and the posture of the outlet 16 is maintained with little variation in the center of gravity due to the motor, the fan 2, and the like. The base body 6 is provided with a retaining member 13, and the base body 6 is integrally moved when the casing 5 is lifted by engaging the eaves portion 18 formed by laterally extending the casing 5. Can be made.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a centrifugal blower with a variable outlet, and more specifically, when blowing air to dry a floor or stairs after cleaning, set the blowing direction to a large angle suitable for the target object. It also relates to a centrifugal blower that can also be set.

[0002]

[Prior art]

 One of the maintenance work of buildings is the flat work such as floors and carpets, and the cleaning work for the uneven and sloped parts such as stairs. In the cleaning work, cold air is often blown to dry the wax applied to the floor after cleaning. This is because when hot air is blown, the target surface shrinks or is damaged due to rapid drying, and a fan that blows natural air is generally used. The fan has the advantages that it has a large air volume and that the left and right swing angles can be increased, but the upper and lower swing angles are generally not large. Moreover, when drying a low flat surface such as a floor, which is an axial flow type and has a high blowing position, there is a disadvantage that the unnecessary air flow that does not follow the flat surface also causes a significant decrease in drying efficiency. . Therefore, recently, centrifugal blowers, which have a low blowing position and can obtain a band-shaped flow, have been used. An example of such a blower is a centrifugal blower 50 as shown in FIG. This takes in air from the side surface 50a and discharges it from a wide air outlet 51 opening forward. Therefore, when drying a floor or carpet, a strip-shaped flow occurs along the drying surface, which is extremely convenient.

[0003]

[Problems to be solved by the device]

 However, the posture is the same with the blower 50 left on the floor, and if you want to dry it locally, you must hold the blower handle 52 and lift it up, and change the angle to keep the blower posture. I have to. This is an extremely tedious task and often requires some measures. When it is desired to maintain a certain blowing angle, for example, a carrier 54 as shown in FIG. 8 is used, and the blower 50 is placed on the base 55 thereof. Then, the fixing position is changed by a bolt 56 with a knob or the like, and the length of the handlebar 58 having the legs 58a supporting the wheels 57 at three points is changed. When the air outlet 51 is directed slightly upward, the front and rear directions of the blower 50 on the carrier 54 may be reversed. However, if the angle becomes large, there is a problem that it will fall out unless the blower is fixed to the carrier. The blower itself may be provided with a mechanism similar to the angle changing mechanism of the carrier. In that case, the range of change is ± 10 degrees with respect to the horizontal line, and even if large, it is limited to ± 20 degrees due to structural restrictions. Therefore, it is impossible to make the air outlet upward, as in the case of drying the wall surface, and it is necessary to change the support and tilting method separately. In addition, turning the leg length changing screw is required to change the angle, resulting in poor operability.

The present invention has been made in view of the above problems, and an object thereof is to allow a blower tube of a centrifugal blower to be changed in an extremely large angle range, and to easily change the direction of an outlet. (EN) Provided is a centrifugal blower having a freely variable outlet, which is excellent in performance, can be easily kept in its blowing posture, and is easy to carry.

[0005]

[Means for Solving the Problems]

 The present invention is driven by a motor in a casing having an inlet opening on the side surface for taking in air from the rotation axis direction of the centrifugal fan and a blowout tube on the front surface for blowing air in a substantially tangential direction of the fan. Applies to centrifugal blowers with a built-in fan. The feature is that, with reference to FIGS. 1 and 2, the outer shape of the casing 5 having the fan 2 built therein is formed in a cylindrical shape except for the portion of the blow-out tube 4 having the wide blow-out port 16. In addition, a base body 6 that supports the casing 5 while keeping the central axis N of the casing 5 horizontal is provided. A supporting roller 11 is mounted on the base body 6 to support the lower outer peripheral surface 5a of the casing 5 and allow the rotation. The casing 5 has an eaves portion 18 that extends further laterally than the side plate 7 provided with the suction port 8. The inner surface of the side plate 6b of the base body 6 has a base body 6 when the casing 5 is lifted. The retaining member 13 is attached so as to come into contact with the inner peripheral surface 18a of the eaves portion 18 so as not to come off from 6. The motor 9 and the fan 2 are arranged substantially concentrically with the casing 5, and when the casing 5 is rotated on the base body 6, the blow-out tube 4 is maintained in a desired direction. . It should be noted that the inner surface 5b of the casing 5 may be provided with a sponge-like guide member 23A that forms an air passage 22 having a spiral wall surface 22a around the fan 2 and that also exhibits a sound deadening function.

[0006]

[Action]

 The casing 5 of the blower has a cylindrical outer shape, and is supported by the base body 6 such that the central axis N thereof is horizontal. The casing 5 has its lower outer peripheral surface 5a mounted on the support rollers 11 and 11 provided on the base body 6, and can be easily rotated by pushing the casing 5 forward or backward to make a wide blower integrated with the casing 5. The outlet cylinder 4 provided with the outlet 16 is in any direction. Since the motor 9 and the fan 2 built in the casing 5 are arranged substantially concentrically with the casing 5, even if the casing 5 is stopped at any position, the center of gravity of the entire blower hardly moves. Therefore, even if the casing 5 is rotated on the base body 6 and the outlet 16 is oriented in a desired direction, the outlet direction can be maintained without using special fixing means. If the air outlet 16 is horizontal, the air can be blown out along the floor 40 (see FIG. 5), and if it is vertical, it can be blown along the wall 42 (see FIG. 6). Further, at the angle in the middle, the outlet 16 is inclined upward, and for example, the stair 41 (see FIG. 6) or the like can be blown with wind from below. When it is rotated the most, it is inclined downward, and it can be installed so that it is blown down from above the gantry 43 (see FIG. 7). On the other hand, when the casing 5 is lifted, the inner peripheral surface 18a of the eaves portion 18 that extends further to the side than the side plate 7 provided with the suction port 8 comes into contact with the retaining member 13 attached to the base body 6, and the casing 5 is removed. It does not come off from the base body 6 and can be carried. The casing 5 has a cylindrical shape, and the motor 9 and the rotating shaft 2b of the fan 2 are arranged so as to substantially coincide with the central axis N thereof, so that a ring-shaped space is formed around the fan 2. If a guide member 23 A having a gradually changing thickness is attached to the inner surface 5 b of the casing 5, an air passage 22 having a spiral wall surface 22 a is secured around the fan 2 and a flow suitable for a centrifugal blower is ensured. Can give way. As the guide member 23A is made of a sponge material, it also exhibits a sound deadening effect.

[0007]

[Effect of device]

 According to the present invention, the direction of the outlet can be changed by rotating the casing mounted on the base body. For this, an operation of touching the upper surface of the outer periphery of the casing and pushing it lightly is sufficient, and the turning operation is extremely simple and the operability is improved. Also, since the angle of the blow-off tube is allowed within a large angle range in which the casing can rotate on the base body, depending on the vertical dimension of the blow-out port, it is possible to rotate up to around 230 degrees to allow various blows. The angle can be selected. Therefore, if the air outlet is set to about 45 degrees downward, it is possible to generate downwind air. The rotation shaft of the motor and fan is located at the same position as the center axis of the casing, and the center of gravity does not move much even when the casing rotates, so the outlet can be kept at the desired position without any special measures. it can. When the casing is lifted, the base body is pulled up via the retaining material, which facilitates movement and transportation. A space is created around the fan built into the casing, but a spiral wall is formed by the sponge-shaped guide member attached to the inner surface of the casing, which improves the efficiency of air flow and suppresses noise leakage to the outside. To be

[0008]

[Embodiment] A centrifugal blower of the present invention, in which the air outlet can be turned, will be described in detail with reference to the drawings showing an embodiment thereof. The centrifugal blower takes in air from the direction of the rotation axis of the fan, blows out pressurized air in the circumferential direction, and blows it out from the direction substantially tangential to the fan. FIG. 1 is a transverse cross-sectional view of a centrifugal blower 1, in which a fan 2 for rotating a blade 2a in a direction of an arrow 3 is contained in a casing 5 formed in a cylindrical shape except for a blow-out tube 4. The blower itself is composed of a casing 5 and a base body 6 for supporting the central axis N thereof horizontally. In FIG. 2, which is a front view in which the upper half is cut away to show the inside, the cylindrical casing 5 is provided with left and right side plates 7 and 7, and the blow-off tube 4 extending substantially tangentially to the fan 2 is provided on the front surface. And a suction port 8 is opened in each side plate 7. A motor 9 is arranged in the central portion of the casing 5, and centrifugal fans 2 and 2 are attached to the left and right of the motor 9. The rotation shaft 2b of the fan 2 that is the output shaft of the motor 9 is located slightly above the central axis N of the casing 5, but is substantially at a position where it can be regarded as substantially concentric with the casing 5. It is arranged.

In order to support the casing 5, as shown in FIG. 1, the base body 6 on which the lower outer peripheral surface 5a is mounted is composed of two bottom bars 6a, 6a and left and right side plates 6b, 6b. It is a frame. This is open at least in the upper part and the front part so that the casing 5 can be placed and the blow-out cylinder 4 can be made substantially horizontal and can be projected forward. Rubber feet 10 are attached to the bottom surface of the bottom bar 6a at four positions in the front, rear, left and right, so that the base body 6 can be stably installed on a flat surface. At the front and rear portions of the inner surfaces of the side plates 6b, 6b of the base body 6 as described above, there are four support rollers 11, 11 on which the casing 5 is placed to allow rotation, and as shown in FIG. It is mounted on a roller shaft 11a fixed with a nut 12B or the like. Above the support roller 11, four retaining members 13, 13 which will be described later are attached afterwards by screws 13a or the like.

In FIG. 2, side plates 7 and 7 forming the casing 5 are provided with a circular suction port 8 having a size substantially the same as the outer diameter of the fan 2. A suction wire net 14 is provided on the inner surface of the opening to prevent foreign matter from entering, and the hopper 15, which extends inward from the suction wire net 14 and smoothly introduces the outside air into the fans 2 and 2, 15 are installed. At the tip of the blow-out tube 4 provided on the front surface of the casing 5, a rectangular air outlet 16 which is long in the left and right is opened so that a wide band-shaped air flow can be sent out. As shown in FIG. 1, the blow-out tube 4 extends in a substantially tangential direction of the fan 2 so as to efficiently send out air, and a lattice-like discharge wire net 17 for preventing foreign matter from entering the front face forming the blow-out port 16 is provided. It is stretched. As shown in FIG. 3, the above-mentioned casing 5 is extended a little further to the side than the side plates 7, 7, and the ring-shaped eaves 18, 18 are secured. The eaves portion 18 is provided for the purpose of engaging with the retaining member 13 attached to the base body 6 described above. That is, by mounting the casing 5 on the support rollers 11 and 11 and then attaching a protrusion as the retaining member 13 to the inner surface of the side plate 6b of the base body 6, when the casing 5 is lifted, the inside of the eaves portion 18 is The peripheral surface 18a is suitable for pulling up the retaining member 13, and the base body 6 can be transported integrally with the casing 5. In this example, the eaves portion 18 is formed on the entire circumference of the casing 5. However, the eaves portion 18 may be partially provided corresponding to the angle of the range of rotation on the base body 6. As shown in FIG. 2, at the center of the top of the casing 6, there is provided a handle 19 which is used when the casing 5 is lifted and conveyed. When the handle 19 is grasped and deformed as shown by a chain double-dashed line. Both ends are pulled out from the left and right storage units 20, 20 and spread out to secure a space for gripping.

The motor 9 that drives the fan 2 is supported by motor stays 21 and 21 that fix the outer peripheral portion to the inner surface 5 b of the casing 5. The inner peripheral portion of the motor station 21 is previously screwed to the side surface of the motor case, and after the motor 9 is arranged in the casing 5 without the side plate 7 attached, the outer peripheral portions of the motor stays 21 and 21 are arranged. Are attached to the casing 5. The casing 5 may be made of steel or the like, but if the casing 5 is made of a resin material such as vinyl chloride, the motor stay 21 can be easily fixed by resin welding or the like. By the way, as described above, since the heavy motor 9 and the fan 2 mounted on the output shaft of the motor 9 via the boss portion 2c are arranged substantially concentrically with the casing 5, the casing 5 does not have any rotation angle. Even when the air blows, the center of gravity does not move so much that the blow-out tube 4 oriented at a desired angle is not swung back. Incidentally, as described above, if not only the casing 5 but also the support roller 11 is made of resin, the frictional force for keeping the casing 5 stationary becomes large, and an appropriate braking force is generated, which is convenient. When the retaining member 13 is attached to the base body 6, its outer peripheral surface may be brought into contact with the inner peripheral surface 18a of the eaves portion 18. This also makes it possible to increase the frictional force acting on the casing 5.

As described above, since the fan 2 and the motor 9 are arranged so as to be substantially concentric inside the casing 5, the inside surface 5 b of the fan 5 and the blades 2 a of the fan 2 are disposed inside the casing 5. A ring-shaped space is created between the surroundings. This space forms an air passage 22 through which the air pressurized by the blades 2a passes, but it is preferable that the space has a spiral wall surface 22a for sending the pressurized air to the blowout tube 4. As shown in FIG. 1, a guide member 23A is attached to the inner surface 5b of the casing 5. The guide member 23A is made of sponge urethane or the like, and its thickness is gradually changed so that it is thickest in the vicinity of the upper edge portion of the blow-out tube 4 and thin in the lower edge portion. As shown in FIG. 2, a urethane material 23B having a constant thickness is also attached to the inner surface 7a of the side plate 7 so that the wind noise of the fan 2 and the noise of the motor 9 can be absorbed together with the guide member 23A. It is considered. By doing so, a shape that follows the inner surface of the existing casing of a centrifugal fan can be realized, while the outer shape of the casing, which is the feature of the present invention, can be kept circular. That is, the casing of a centrifugal blower is usually non-circular, and therefore, the idea of rotating the casing does not occur at all, but the above configuration allows the casing to have a simple cylindrical shape. Therefore, there is an advantage that the mechanism can be easily manufactured and rotated easily.

By the way, although a wide band-shaped flow is emitted from the outlet 16, in the present example, the outlet cylinder 4 is provided so that the width of the blown air can be further widened. A louver device 25 is attached in the inside. As shown in FIG. 4, this includes louvers 26, 26 that are rotatably supported at the front end so as to be rotatable left and right, and extend in a direction that is normally perpendicular to the rotation shaft 2b of the fan 2, and an operation lever 27 that changes the angle. And a link mechanism that connects the two. The operation lever 27 is located on the upper surface of the blow-out cylinder 4, but is attached to the lower end of the blow-out cylinder 4, and rotates in the blow-out cylinder 4 together with the operation lever 27. The louver 26 comprises a second link 29 for connecting the rear end of the louver 26 with a pin, and the louvers 26, 26 open in the shape of a letter V shown by a chain double-dashed line as the operating lever 27 rotates. In this way, in addition to adjusting the blowing width of the wind, it is also possible to adjust the air volume. Therefore, a variable speed knob 30 for changing the rotation speed of the motor 9 is provided on the central upper surface of the casing 5. The on / off switch 31 and the power cord 32 are also attached at positions where they do not hinder the rotation of the casing 5.

The centrifugal blower 1 configured as described above operates in the following manner, and it is possible to accurately and promptly change the outlet 16 that supplies the cool air toward the object to be blown. As shown in FIG. 5, the blower 1 is placed on the floor 40, and the casing 5 is rotated so that the air flow from the blowout port 16 is along the floor surface. When the casing 5 is rotated to the maximum forward, the blow-out tube 4 is tilted slightly downward. Even if the desired blowing angle is set in this manner, the heavy motor 9 is located substantially at the center of the casing 5, and the posture of the casing 5 does not change due to an unbalanced load. The switch 31 can be turned on and the knob 30 can be turned to blow out a desired amount of air in a band shape. Although a small amount of moment acts on the casing 5 due to the blowout, it is not enough to change the blowout angle. By rotating the operating lever 27 shown in FIG. 4 to open the louvers 26, 26 in a V-shape, the blowing width can be slightly widened. When the stairs 41 and the like are dried as shown in FIG. 6, it is sufficient to give the blow-out tube 4 an angle of depression and elevation. The outlet 16 may be brought closer to the upper side so as to open upward. In addition, when the air is blown down to dry the stairs from above, or when the blower 1 is placed on the pedestal 43 and the air is blown to an object placed below as shown in FIG. 7, the casing 5 is used. The blow-off tube 4 may be turned downward and faced downward. In this example, the angle of the blow-off tube 4 can be changed within a range of up to about 230 degrees, and most areas can be covered. In any of the postures, the movement of the center of gravity due to the rotation of the casing 5 is small, and due to an appropriate frictional force between the casing 5 and the support roller 11, etc., even if a special fixing method is not adopted, The orientation is retained.

When the blower 1 is moved, the casing 5 may be turned so that the handle 19 is on the upper side and then grasped and lifted. The inner peripheral surface 18a of the eaves portion 18 of the casing 5 pulls up the stopper member 13, and the base body 6 is conveyed integrally with the casing 5. The guide member 23A and the urethane material 23B attached to the inner surface 5b of the casing 5 and the inner surfaces 7a, 7a of the side plates 7, 7 are sponge-like, and noise generated by the motor 9 and the fan 2 is reduced. The guide member 23A may form a spiral wall surface 22a in the air passage 22 around the fan 2, so that the air pressurized by the fan 2 can be made into a flow suitable for a centrifugal blower. The fan efficiency is also kept high. In the above example, the fans are attached to both sides of the motor, but the fan may be attached to only one side of the motor, or the motor may be placed outside the side plate of the casing. In either case, if the center of gravity of the portion placed on the base does not change significantly due to the rotation of the casing, the outlet can be kept in the desired direction. Further, the number of supporting rollers on which the casing is mounted is not limited to the four front, rear, left and right, and may be more than that. Further, depending on the shape of the base body or the blow-out tube, it is possible to adopt a long roller that extends laterally between the side plates of the base body by changing the diameter. The number of retaining materials can be appropriately selected, and the shape thereof can also be appropriately selected. This may be any as long as it can be engaged with the eaves portion, for example, by thrusting it from the side of the base body toward the casing.

As can be seen from the above description, in the centrifugal blower of the present invention, the fan driven by the motor is built in the casing, while the casing is mounted on the support roller provided on the base body to rotate. It is possible, and it is possible to turn the blowout tube into a wide angle range and send out the air from the blowout port in a desired direction. In addition, when moving or transporting, if you lift the casing, you can handle everything together, and you can touch the casing lightly to change the direction of the outlet easily. A blower can be installed by operation. Furthermore, the casing support and posture holding mechanism are simple, and maintenance and inspection work is almost unnecessary. Therefore, the blowing up and down angle can be arbitrarily selected by efficiently drying the flat surface such as floors and carpets required for cleaning and washing work in building maintenance, and by spraying on a sloped area. The degree of freedom in selecting can be increased.

[Brief description of drawings]

1 is a cross-sectional view of the centrifugal fan according to the present invention, taken along the line II-II of FIG.

FIG. 2 is a front view of the blower whose upper half is broken.

FIG. 3 is an enlarged view showing a mounting state of a support roller on which a casing is mounted and a retaining member.

FIG. 4 is a plan view of the blower.

FIG. 5 is an installation diagram of a blower showing a usage pattern in a case where the casing is rotated to the maximum forward and the blow-out cylinder is placed along the floor.

FIG. 6 is an installation state diagram when drying an inclined portion such as a staircase.

FIG. 7 is an installation example when the blowing cylinder is maximally deflected in the opposite direction, such as when air is blown down from the top of a stand or the like.

FIG. 8 is a view showing a state in which the conventional drying blower is used.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Centrifugal blower, 2 ... Fan, 2b ... Rotating shaft, 4 ... Blowing cylinder, 5 ... Casing, 5a ... Lower outer peripheral surface, 5b ... Inner surface, 6 ... Base body, 6b ... Side plate, 7 ... Side plate,
8 ... Suction port, 9 ... Motor, 11 ... Support roller, 13 ... Retaining material, 16 ... Blowing port, 18 ... Eaves part, 18a ... Inner peripheral surface, 22 ... Air passage, 22a ... Spiral wall surface, 23
A ... Guide member, 40 ... Floor, 41 ... Stairs, 42 ...
Wall, 43 ... Stand, N ... Central axis of casing.

Claims (2)

[Scope of utility model registration request] 1. A motor is driven by a motor into a casing having an inlet opening on a side surface for taking in air from a rotation axis direction of a centrifugal fan and having a blow-out cylinder on a front surface for blowing air in a substantially tangential direction of the fan. In a centrifugal blower having a built-in fan, the outer shape of the casing containing the fan is formed in a cylindrical shape except for the portion of the blowout tube having a wide outlet, and the central axis of the casing is horizontal. A base body for supporting the casing is provided while being maintained, and a support roller for mounting the lower outer peripheral surface of the casing to allow rotation is provided on the base body. The side plate of the base body has an eaves portion extending further to the side than the side plate provided, and the base plate has an inner surface on which the base plate is raised when the casing is lifted. So as not to deviate from,
A retaining member that comes into contact with the inner peripheral surface of the eaves portion is attached, the motor and the fan are arranged substantially concentrically with the casing, and when the casing is rotated on the base body, the blowout tube is desired. Centrifugal blower with a flexible outlet that can be turned in any direction. 2. A sponge-like guide member that forms an air passage having a spiral wall surface around the fan on the inner surface of the casing and that also exhibits a silencing function,
The centrifugal blower according to claim 1, wherein the blower has a flexible outlet.