JPH0667888U - Cross flow fan - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a thin cross-flow fan that can be incorporated into flat products. A main body case 1 is formed in a square shape, and a concave groove 4 is formed on the upper surface thereof from one edge to the inside and reaches the other edge. Provide an outlet. Then, the motor 5 is fixed on the inner bottom surface of the groove 4, and the rotary plate 6 is attached to the rotary shaft of the motor 5. Then, the blade 7 is attached to the outer periphery of the rotary plate 6 to form the impeller 8 with the rotary plate 6 and the blade 7. Further, blades 7 are arranged around the motor 5, and an air passage 9 between the inner periphery of the blade 7 and the motor 5 allows the flow-through guide 1 to the main body case 1.
0 is provided. Then, the impeller 8 is rotated, and the air sucked from one direction of the outer periphery is guided by the flow-through guide 10 or the like and discharged to the other direction of the outer periphery through the air passage 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cross flow fan used for a blower such as an air purifier or an air conditioner.

[0002]

[Prior art]

 Conventionally, in this type of cross-flow fan, for example, there is a configuration in which an impeller is formed to have a relatively small diameter and is elongated in the axial direction, and a motor is attached to one end portion in the axial direction. Then, the motor is driven to rotate the impeller, and the air sucked from one direction of the outer circumference of the impeller passes through the inside of the impeller and is discharged to the other direction of the outer circumference.

[0003]

[Problems to be solved by the device]

 However, conventionally, when incorporating such a cross flow fan into a flat product, it was necessary to further reduce the diameter of the impeller according to the flat shape. Then, if the diameter of the impeller is reduced in this way, the air volume decreases more than the reduction ratio, so in order to maintain the initial air volume, the diameter of the impeller is reduced, while the impeller is correspondingly reduced. The length of must be lengthened. However, it was difficult to secure the space for the length.

Therefore, an object of the present invention is to provide a crossflow fan that can be incorporated into a flat product without such a problem.

[0005]

[Means for Solving the Problems]

 Therefore, this invention drives the motor 5 to rotate the impeller 8 so that the air sucked from one direction of the outer periphery of the impeller 8 passes through the impeller 8 as shown in the following illustrated embodiments. In the cross flow fan 15 that discharges to the outer periphery in another direction, the blades 7 of the impeller 8 are arranged around the motor 5, and the flow guide 10 is provided in the air passage 9 between the inner periphery of the blade 7 and the motor 5. Is provided.

[0006]

[Action]

 In this invention, the motor 5 is driven to rotate the impeller 8, air is sucked into the impeller 8 from one direction of the outer periphery of the impeller 8, and the sucked air is guided by the flow-through guide 10 or the like. Through the air passage 9 to the outer circumference of the impeller 8 and other directions.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a schematic structure of a cross flow fan which is an embodiment of the present invention.

The cross flow fan 15 of the present invention, as shown in FIGS. 3 and 2, includes a main body case 1 having a flat rectangular shape. The body case 1 has a concave groove 4 formed on the upper surface thereof from the lower edge in FIG. 2 through the inside to the upper right corner, one of the concave grooves 4 having an air inlet 4a and the other having an outlet 4b. To do. Then, the upper surface side of the main body case 1 is covered with a thin plate-shaped cover 2. Then, in the main body case 1, the motor 5 is fixed on the inner bottom surface of the concave groove 4. The center of a circular rotary plate 6 is attached to the rotary shaft 5a of the motor 5. As shown in FIG. 1, the rotary plate 6 has a plurality of blades 7 attached to the outer periphery thereof so as to project toward the inner bottom surface of the concave groove 4. The vanes 7 and the rotary plate 6 form an impeller 8. Thus, the impeller 8 has an air passage 9 formed between the inner circumference of the impeller 7 and the motor 5.

Then, in this cross-flow fan 15, when the power is turned on, the motor 5 is driven to rotate the impeller 8 in the direction of the arrow in FIG. 2, and air is sucked into the impeller 8 from the suction port 4a. The air is sucked and discharged through the air passage 9 to the outside through the discharge port 4b.

By the way, in the cross flow fan 15, at the time of this blowing, for example, as shown in FIG. 4, a part of the air flowing into the air passage 9 from the suction port 4a is not discharged from the discharge port 4b as it is, A complex vortex region was generated in the area B shown in the figure, and a circulating flow was generated there, which caused noise and the blowing efficiency was reduced.

Therefore, as shown in FIGS. 1 and 2, the cross-flow fan 15 of the present invention is provided with a convex through-flow guide 10 on the inner bottom surface of the main body case 1 toward the circulating flow generation area B.

As a result, as shown in FIG. 2, the air sucked from the suction port 4a flows through the air passage 9 through the air passage 9 to the discharge port 4b as it is, and is discharged from the discharge port 4b. To do. Then, it prevents the generation of a circulating flow in the air passage 9.

Now, FIG. 5 shows a case where the cross flow fan 15 of the present invention is assembled in a flat air purifier. Reference numeral 20 in the drawing denotes a purifier body case, which is a flat and vertically long box-shaped case. Then, the cross flow fan 15 is installed in the upper part of the purifier body case 20, and the dust collecting unit 21 and the control circuit unit 23 are arranged side by side on the right and left in the lower part. Reference numeral 22 in the figure denotes a door provided on the main body case 20 so as to be openable and closable. The door 22 is provided with a suction window 22a at the bottom and a discharge window 22b at the top. The door 22 near the discharge window 22b is provided with a convex flow-through guide 10 at a position corresponding to the circulating flow generating area B when the door 22 is closed.

Then, when the door 22 is closed and the air purifier is used, the motor 5 is driven to rotate the wing wheel 8 to suck air through the suction window 22a and draw the sucked air in the direction of the arrow. It is sent to the impeller 8 through the inside of the dust collection unit 21. Then, the sent air is passed through the inside of the impeller 8 from one direction of the outer circumference of the impeller 8, guided by the flow-through guide 10 or the like, discharged to the other direction of the outer circumference of the impeller 8, and sent out from the discharge window 22b to the outside. . When the sucked air passes through the dust collecting unit 21, the dust collecting unit 21 cleans the air.

[0015]

Therefore, according to this invention, since the blades of the impeller are arranged around the motor, the axial length of the impeller can be shortened and the diameter of the impeller can be increased. If so, the axial length of the impeller can be further shortened, and this makes it possible to incorporate the crossflow fan into flat products.

Further, according to this invention, in the air passage between the inner circumference of the blade of the impeller and the motor, there is provided a flow-through guide for guiding the air sucked in from one direction of the outer circumference of the blade wheel and discharging it in the other direction. Since it is provided, it is possible to prevent the circulation flow from being generated in the air passage due to the through-flow guide when the air is blown, and thereby to prevent the generation of noise or the reduction of the air flow efficiency due to the circulation flow. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along line AA in FIG. 2 of a cross flow fan that is an embodiment of the present invention.

FIG. 2 is a front view showing the cross flow fan with a cover removed.

FIG. 3 is a plan view with the cover attached.

FIG. 4 is an explanatory view of a state where a circulating flow is generated in this cross flow fan.

FIG. 5 is a perspective view showing an air purifier in which the crossflow fan of the present invention is assembled, with a door open.

[Explanation of symbols]

 5 Motor 7 Blade 8 Impeller 9 Air Passage 10 Cross-flow Guide 15 Cross Flow Fan

Claims (1)

[Scope of utility model registration request] 1. A cross-flow fan that drives a motor to rotate an impeller and discharges air sucked in from one direction of the outer periphery of the impeller and discharges the air to the other direction of the outer periphery of the impeller. A cross-flow fan, in which the blades of the impeller are arranged in the air passage, and a flow-through guide is provided in an air passage between the inner circumference of the blade and the motor.