KR20060015074A - Impeller cover of centrifugal fan - Google Patents

Abstract

The present invention forms a structure for guiding the air so that the air can be smoothly introduced into the inlet of the impeller cover to even the flow of air flowing into the inlet, the suction angle of the air is sucked in the direction corresponding to the angle of the impeller The impeller cover of the centrifugal blower to reduce the flow loss generated at the inlet of the impeller so as to form a guide portion for guiding the inflow of air in the inlet of the impeller cover not only to reduce the noise during the intake of air but also to the air flow path It is an object of the present invention to provide an impeller cover of a centrifugal blower in which resistance is reduced to increase suction power and efficiency. In order to achieve the above object, the impeller cover of the centrifugal blower according to the present invention includes a plurality of guide vanes radially formed at the inlet of the impeller cover in the impeller cover of the centrifugal blower which is formed at the center thereof and covers the upper part of the impeller. do.

Vacuum cleaners, centrifugal blowers, impellers, blades, diffusers, guide vanes, rear vanes, impeller covers

Description

Impeller Cover of Centrifugal Blower {IMPELLER COVER OF CENTRIFUGAL FAN}

Figure 1 is a partially cutaway cross-sectional view showing the inside of the centrifugal blower according to the prior art.

2 and 3 are a perspective view and a cross-sectional view of the impeller cover of the centrifugal blower according to the prior art.

4 and 5 are a perspective view and a cross-sectional view of the vacuum cleaner according to the present invention.

Figure 6 is a partial cutaway cross-sectional view of the centrifugal blower of the vacuum cleaner according to the present invention.

7 and 8 are a perspective view and a sectional view of the impeller cover of the centrifugal blower according to an embodiment of the present invention.

Figure 9 is a perspective view of the impeller cover of the centrifugal blower according to the second embodiment of the present invention.

10 is a perspective view showing the impeller cover of the centrifugal blower according to the third embodiment of the present invention.

11 is a perspective view showing the impeller cover of the centrifugal blower according to the fourth embodiment of the present invention.

12 is a perspective view showing the impeller cover of the centrifugal blower according to the fifth embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

50: vacuum cleaner 52: main body

52a: insertion hole 54: dust collecting bag

56 filter 60 suction part

62: intake nozzle 64: extension tube

66: suction hose 69: control unit

68: handle portion 70: centrifugal blower

72 impeller cover 72a suction port

74: impeller 75: blade

76: separator 77: diffuser

78: rear vane 80: motor

82: rotation shaft 84: motor housing

92: guide vanes

The present invention relates to an impeller cover of a centrifugal blower, and more particularly, to form a structure for guiding air so that air can smoothly flow into the inlet of the impeller cover to even the flow of air flowing into the inlet, The present invention relates to an impeller cover of a centrifugal blower in which a suction angle is sucked in a direction coinciding with an angle of an impeller so that a flow loss generated at an inlet of the impeller is reduced.

In general, a vacuum cleaner is a cleaning tool that separates dust only by generating suction force and inhaling air and at the same time allowing foreign substances such as dust to be sucked in. The filter type, dust bag type, cyclone type, etc. It is classified as a vacuum cleaner. The vacuum cleaner includes a main body including a dust collecting bag for storing dust and a centrifugal blower for sucking air, and a suction part connected to the main body to provide a passage for sucking air together with the dust.

1 is a partially cutaway sectional view showing the inside of a centrifugal blower according to the prior art, and FIGS. 2 and 3 are a perspective view and a cross-sectional view of the impeller cover of the centrifugal blower according to the prior art.

In the conventional centrifugal blower 10, as shown in FIGS. 1 to 3, a plurality of blades 15 are formed inside the impeller cover 12 having the inlet 12a formed at the center thereof and the rear thereof opened. An impeller 14 that sucks air is rotatably installed. In addition, the motor housing 24 for closing the rear of the impeller cover 12 is coupled to the opened rear of the impeller cover 12. The motor 20 is installed inside the motor housing 24, and the rotating shaft 22 is connected to rotate the impeller 14.

In addition, a separator 16 is provided between the impeller 14 and the motor 20 to insulate the impeller cover 12 from the top and the bottom, and the impeller 14 is disposed at the outer circumference of the separator 16. Diffuser 17 for diffusing the air sent to the outlet portion of the) and raising the positive pressure of the air, and the rear guided to the flow path of the motor 20 in the compressed state in which the air passed through the diffuser 17 is sucked and compressed The vanes 18 are installed in the circumferential direction on the upper and lower surfaces of the separator 16, respectively.

In the above-described conventional vacuum cleaner centrifugal blower 10, the impeller 14 is rotated when the motor 20 is driven, and the air flows outward of the impeller 14. The flowed air is pumped toward the motor 20 by a flow path formed by the upper surface of the diffuser 17 and the separator 16 and the lower surface of the rear vane 18 and the separator 16. In addition, the air cools the outer circumferential surface of the motor 20 and is exhausted to the outside through the discharge port 12b.

As such, the air flowing into the impeller 14 enters the inlet 12a of the impeller cover 12 and hits the inlet of the impeller 14 to induce noise and at the same time the flow of the sucked air is uneven. . In addition, when the intake of the air from the inlet 12a of the impeller cover 12 is not constant, there is a problem that the intake performance of the air is lowered.

In addition, the conventional impeller cover 12 flows in the inlet of the impeller 14 because the incidence angle of the air flowing into the impeller 14 through the inlet 12a does not coincide well with the inlet angle of the impeller 14. The resistance is increased, which leads to a pressure loss, which causes a decrease in suction power and efficiency.

An object of the present invention is to solve the problem occurring in the impeller cover of the centrifugal blower according to the prior art as described above, by forming a guide for guiding the inflow of air in the inlet of the impeller cover to reduce the noise during the intake of air In addition, it is to provide an impeller cover of the centrifugal blower that the flow resistance of the air is reduced to increase the suction power and efficiency.

In order to achieve the above object, the impeller cover of the centrifugal blower according to the present invention has a suction port formed in the center and covers the upper part of the impeller, and the impeller cover of the centrifugal blower has a plurality of guide vanes radially formed at the suction port of the impeller cover. Include.

Here, the guide vanes may be formed to be inclined in the circumferential direction. In addition, the guide vane may be increased in height in the radial direction from the center portion. In addition, the guide vanes may be formed spirally. In addition, the inclined angle of the guide vane may be variable.

In addition, the impeller cover according to a preferred embodiment may include a connection support is formed in the center of the inlet and connected to the end of each guide vane. Here, the connection support may be an annular ring penetrated inside. In addition, the impeller cover according to another embodiment includes a plurality of rods extending radially from the center, each rod may be connected to the guide vanes.

Hereinafter, with reference to the drawings will be described in detail a preferred embodiment of the present invention.

4 and 5 are a perspective view and a cross-sectional view of the vacuum cleaner according to the present invention.

In the vacuum cleaner 50 according to the present invention, as shown in FIGS. 4 and 5, a space in which a dust collecting bag 54, a centrifugal blower 70, and the like are installed in a main body 52 forming an appearance is divided into sections. In the partitioned area, a filter 56 for filtering foreign matter not filtered by the dust collecting bag 54 is provided. In the rear portion of the main body 52, an exhaust portion 58 through which air discharged from the centrifugal blower is exhausted is formed. In addition, an insertion hole 52a for connecting the suction part 60 is formed in the main body 52.

The suction part 60 is connected to an intake nozzle 62 for sucking dust, an extension pipe 64 and a suction hose 66 connecting the intake nozzle 62 with the main body 52, and the extension pipe ( 64 and the suction hose 66 are connected to a handle 68 integrally formed with a control unit 69 for controlling the operation of the cleaner. Here, the extension pipe 64 is installed to be detachable from the handle portion 68 and can vary the length.

6 is a partial cutaway sectional view of the centrifugal blower of the vacuum cleaner according to the present invention, wherein the above-described centrifugal blower 70 has a plurality of blades inside the impeller cover 72 having an inlet 72a formed at the center thereof and having a rear opening. An impeller 74 formed with 75 is rotatably installed. Here, the blade 75 of the impeller 74 is formed in a curved shape running in the outer circumferential direction from the center to suck the air sucked into the suction port 72a in an inclined direction. In addition, a motor 80 for rotating the impeller 74 is disposed at a lower portion of the impeller 74 so that the rotation shaft 82 is connected to the central portion of the impeller 74. The motor 80 is mounted to a motor housing 84 that closes the opened rear of the impeller cover 72 and surrounds the motor 80.

On the other hand, between the impeller 74 and the motor 80, the separator 76 isolating the impeller cover 72 to the upper and lower portions between the impeller 74 and the motor 80 to form an air flow path (76) This is installed. The separator 76 separates the inside of the impeller cover 72 into upper and lower portions so that the air introduced by the rotation of the impeller 74 flows laterally, and guides the flow of air.

In addition, at the outer circumference of the upper surface of the separator 76, a diffuser 77 is disposed adjacent to the outlet of the impeller 74 to diffuse the air to be sent and to increase the positive pressure. The diffuser 77 is composed of a plurality of vanes 77a disposed at predetermined intervals on the radially outer circumference of the impeller 74, and thus the outlet of the diffuser 77 is larger than the flow path area at the inlet side between the vanes 77a of the diffuser 77. As the flow path area of the side is increased, the air is expanded, the speed is decreased, the pressure is increased, and the pressure of the air passing through the feather 77a of the diffuser 77, that is, the pressure inside the impeller cover 72 is increased. The pressure of the inlet port 72a of the impeller cover 72, that is, the pressure outside the impeller cover 72 drops, and due to this pressure difference, a strong suction force capable of sucking outside air into the impeller cover 72 is increased. Occurs. In addition, a rear vane 78 is formed on a lower surface of the separator 76 to guide air fed by the feather 77a of the diffuser 77 toward the motor 80. Then, the air is cooled to the outer peripheral surface of the motor 80 and exhausted to the outside through the discharge port 72b.

Here, the feather 77a of the diffuser 77 is formed spirally in the same direction as the rotational direction of the impeller 74, the rear vanes 78 of the direction opposite to the rotational direction of the impeller 74 It is formed spirally.

7 and 8 are a perspective view and a cross-sectional view of the impeller cover of the centrifugal blower according to an embodiment of the present invention, with reference to this will be described in more detail the impeller cover 72 according to the present invention.

The impeller cover 72 described above is provided with a flow guide portion for guiding the flow of air sucked into the impeller 74. The flow guide part includes a plurality of guide vanes 92 radially formed on an inner circumferential surface of the suction port 72a of the impeller cover 72. Here, the guide vanes 92 are formed to be inclined in the circumferential direction, the inclined angle of the guide vanes 92 is formed at an angle corresponding to the inlet angle of the impeller 74. The guide vane 92 guides the air introduced by the suction force of the impeller 74 to allow the air to be introduced at an angle coinciding with the inlet angle of the impeller 74. Thus, the air flowing into the impeller 74 is sucked in a constant flow to reduce the flow loss, the suction force and the suction efficiency is increased.

9 is a perspective view of the impeller cover 72 of the centrifugal blower 70 according to the second embodiment of the present invention, the guide vane 102 according to the second embodiment is radial in the central portion 102a The height increases toward the outer portion 102b. This is because when the impeller 74 is rotated, the downward air flow near the vertical is formed at the center of the inlet 72a of the impeller cover 72, so that the flow resistance of the air does not increase even when no means for guiding the separate air is provided. On the other hand, the air around the suction port 72a of the impeller cover 72 is sucked at a predetermined angle when the impeller 74 rotates, so that the height of the guide vane 102 is increased toward the periphery so that the air flows. Reduce resistance.

10 is a perspective view of the impeller cover of the centrifugal blower according to the third embodiment of the present invention. Unlike the second embodiment, the guide vane 112 formed at the suction port 72a of the impeller cover 72 according to the third embodiment of the present invention has the same height as the height of the center portion 112a and the outer portion 112b. Is formed. In addition, the guide vane 102 is formed in a spiral in which the inclined angle gradually increases from the center portion toward the radial direction. That is, the guide vane 112 is formed in the center portion 112a is close to the vertical while the outer portion 112b is formed to be inclined at the same angle as the flow direction of air flowing into the inlet of the impeller.

The guide vane 112 of this structure is the air flowing into the center of the inlet port (72a) of the impeller cover 72 is introduced at an angle close to the vertical, the air introduced into the peripheral portion is introduced into the inlet of the impeller 74 Suction at an angle coinciding with air. In addition, the guide vane 112 is formed in a direction in which the inclined angle between the central portion and the peripheral portion is gradually increased, the intake angle of the air is continuously increased. As a result, a stable flow is formed upon inhalation of air in any portion of the guide vane 112.

Preferably, as well as the guide vanes 112 according to the third embodiment described above, the guide vanes 92 and 102 according to the first and second embodiments may be a rotational speed of the impeller 74 and an impeller cover ( It is also possible to be installed so that the inclined angle is variable by the size of the suction port 72a of the 72.

On the other hand, the flow guide portion may further include a connection support for connecting and supporting a plurality of guide vanes 122 to the central portion of the inlet (72a). For example, referring to FIG. 11, which is a perspective view of the impeller cover 72 of the centrifugal blower 70 according to the fourth embodiment of the present invention, the connection support is formed of an annular ring 124 penetrating therein. do. The ring 124 may be integrally formed with the guide vane 122 or manufactured as a separate member, and then coupled by welding or adhesive.

 As such, when each guide vane 122 is connected by the ring 124, the guide vanes 122 may be more firmly supported to prevent rocking of the guide vanes 122 generated when the air is sucked in. In addition, the ring 124 may increase the amount of air flowing through the central portion of the inlet 72a of the impeller cover 72 through the central portion thereof.

The above-described connection support may be modified in various shapes other than the annular ring 124. 12 is a perspective view illustrating an impeller cover of a centrifugal blower according to a fifth embodiment of the present invention, wherein the connection support portion includes a plurality of rods 134 extending radially from the center of the inlet port 72a of the impeller cover 72. It is also possible to form. The rod 134 is integrally formed with a central portion and is connected to the guide vanes 132 corresponding to each end thereof.

Looking at the operation of the centrifugal blower 70 of the vacuum cleaner 50 according to the present invention configured as described above are as follows.

First, when the motor 80 is operated by the user's operation, the impeller 74 connected to the motor 80 and the rotary shaft 82 rotates and blows air in the circumferential direction. At this time, a vacuum is formed in the central portion of the impeller 74 and air is introduced through the inlet port 72a of the impeller cover 72. In addition, the air flowing into the inlet 72a of the impeller cover 72 may include air introduced into the inlet of the impeller 74 by guide vanes 92, 102, 112, 122, and 132 formed in the inlet 72a. It flows in at a matching angle.

In this way, the flow of air flowing into the inlet of the impeller 74 is the angle at the moment of suction into the inlet 72a of the impeller cover 72 coincides with the inlet angle of the impeller 74, the pressure loss of the air flow This will not happen. In addition, since the flow of air introduced into the impeller 74 is stably maintained, the loss of flow does not occur in the process of being sucked into the impeller 74, thereby increasing the suction force and efficiency.

Meanwhile, as described above, the air introduced into the impeller 74 is blown into the flow path formed by the upper surface of the separator 76 and the feather 77a of the diffuser 77 and is diffused, and the impeller cover 72 is formed. It is blown into the flow path formed by the lower surface of the separator 76 and the rear vanes 78 along the inner surface of the. Then, the air is cooled to the outer peripheral surface of the motor 80 and exhausted to the outside through the discharge port 72b.

Although the impeller cover of the centrifugal blower according to the present invention as described above has been described with reference to the illustrated drawings, the present invention is not limited to the embodiments and drawings described above, the technical field to which the present invention belongs within the claims Of course, various modifications and variations can be made by those skilled in the art.

Therefore, the impeller cover of the centrifugal blower according to the present invention configured as described above is introduced into the impeller by a plurality of guide vanes formed around the suction port, so that the air flows into the impeller. In the process, the flow loss does not occur, and since the suction angle of the flow is formed to be the same, there is no sudden fluctuation of the flow and the generation of noise is reduced. In addition, since the flow resistance is reduced around the suction port of the impeller, the suction power and efficiency of the centrifugal blower are increased.

Claims (8)

In the impeller cover of the centrifugal blower is formed in the center and covers the upper part of the impeller, The inlet of the impeller cover, the impeller cover of the centrifugal blower, characterized in that it comprises a plurality of guide vanes radially formed. The method according to claim 1, The guide vane impeller cover of the centrifugal blower, characterized in that formed inclined in the circumferential direction. The method according to claim 1 or 2, The guide vane impeller cover of the centrifugal blower, characterized in that the height is increased toward the radial direction from the center portion. The method according to claim 1 or 2, The guide vane is impeller cover of the centrifugal blower, characterized in that formed in a spiral. The method according to claim 2, The guide vane impeller cover of the centrifugal blower, characterized in that the inclined angle is variable. The method according to claim 1 or 2, The impeller cover of the centrifugal blower, which is formed in the center of the suction port and comprises a connection support connected to the end of each guide vane. The method according to claim 6, The connection support is an impeller cover of the centrifugal blower, characterized in that the inner ring penetrated. The method according to claim 6, The connecting support portion includes a plurality of rods extending radially from the center, each rod impeller cover of the centrifugal blower, characterized in that connected to the guide vane.

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