JPH04329919A - Electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To reduce the exhaust air resistance and increase heat radiation of the rear face of an electric fan 31. CONSTITUTION:An electric fan 31 is contained in an electric fan chamber 14 of an electric cleaner body 1 and a vibration proof member 41 is fitted at the fan 32 of the electric fan 31. The front support wall 51 and the rear support wall 52 supporting the fan 32 through the vibration proof member 41 are provided in the electric fan chamber 14. The motor 33 of the electric fan 31 is not supported but projected into the electric fan chamber 14.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner with a built-in electric blower.

0003

[Prior Art] This type of vacuum cleaner has a dust collection chamber communicating with the suction port and an electric blower chamber communicating with the exhaust port in the vacuum cleaner body, and the front suction side is connected to the electric blower chamber to collect dust. It communicates with the chamber and communicates the rear exhaust side with the exhaust port to house an electric blower.

This electric blower is provided with an electric part on the rear exhaust side and a fan part with a fan rotated by the electric part and a fan cover covering the fan on the front intake side.

[0005] A vibration isolating material is attached to the front peripheral edge of the fan section, and a vibration isolating material is attached to a protrusion protruding from the rear surface of the electric blower, so that a front support wall portion protruding inside the electric blower chamber is installed. The structure is such that the front part of the fan part is supported through the vibration isolating material, and the protruding part of the electric part is supported through the vibration isolating material by the rear support wall part formed protruding into the electric blower chamber.

Then, by driving the electric blower, dust and air are sucked into the dust collection chamber through the suction port, and the filtered air is sucked in from the front intake side of the electric blower through the dust collection chamber, and then the dust is sucked into the dust collection chamber from the rear exhaust side. It is discharged into the room and exhausted to the outside from an exhaust port through a hole provided in a part of the rear support wall.

[0007]

[Problems to be Solved by the Invention] As mentioned above, in conventional vacuum cleaners, the air discharged into the electric blower room from the rear exhaust side of the electric blower is discharged into the air path from the exhaust port to the outside. Since the rear support wall is present and the area of the exhaust air passage is regulated by the rear support wall, the exhaust resistance is large, which is a factor that reduces the air intake and exhaust efficiency of the vacuum cleaner.

Furthermore, because the distance between the rear surface of the electric blower and the rear support wall is narrow or they are in close contact with each other, it is difficult for the heat generated by the operation of the electric blower to escape from the rear surface of the electric blower. Parts can easily become hot. especially,
If the electric blower heats up abnormally during abnormal operation when something sticks to the suction port and air cannot be sucked in, the rear support wall may become thermally deformed.

Furthermore, since the fan rotates at high speed, noise is generated due to friction with the air. This noise exits into the electric blower room through the fan cover that covers the fan, rides on the exhaust air discharged from the rear exhaust side of the electric blower, and leaks from the exhaust port.

The present invention has been made in view of the above points, and it reduces exhaust resistance and improves intake and exhaust efficiency, and also improves heat dissipation of the rear surface of an electric blower.
An object of the present invention is to provide a vacuum cleaner in which noise generated by rotation of a fan is prevented from leaking outside through an exhaust port.

[Configuration of the invention]

0012

[Means for Solving the Problems] The invention as claimed in claim 1 provides an electric blower chamber that communicates with a suction port and an exhaust port in a vacuum cleaner body, and connects the front suction side of the electric blower chamber with the suction port. and a vacuum cleaner housing an electric blower with a rear exhaust side communicating with an exhaust port, the electric blower having an electric part provided on the rear exhaust side, a fan rotated by the electric part on the front intake side, and this fan. A fan section having a fan cover covering the fan section is provided, and a vibration isolating material is provided to cover at least a front peripheral edge and a rear peripheral edge of the fan section of the electric blower, and a vibration isolating material is provided in the electric blower room through the vibration isolating material in front of the fan section. A front support wall part and a rear support wall part are provided to support the front and rear parts.

[0013] According to a second aspect of the invention, in the first aspect of the invention, the rear support wall portion covers substantially the entire rear surface of the fan portion via a vibration isolating material.

[0014]

[Operation] According to the invention of claim 1, the electric blower housed in the electric blower chamber of the vacuum cleaner main body has the front and rear parts of the fan section interposed between the front support wall part and the rear support wall of the vacuum cleaner main body through the vibration isolating material. The motorized part projects into the electric blower room without being supported. Therefore, there are no walls inside the electric blower room between the rear exhaust side of the electric blower and the exhaust port, increasing the area of the exhaust air path, reducing exhaust resistance, and improving the vacuum cleaner's air intake and exhaust efficiency. do. Further, heat generated in the electric part of the electric blower is efficiently released into the electric blower room.

[0015] In the invention of claim 2, in the invention of claim 1, the rear support wall portion covers substantially the entire rear surface of the fan portion of the electric blower via the vibration isolating material, so that the noise generated by the rotation of the fan is reduced. This reduces the amount of electric blower that is transmitted into the room and leaks outside through the exhaust port.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a vacuum cleaner main body, and this vacuum cleaner main body 1 includes an upper case 2 and a lower case 3 made of synthetic resin, and a lid 4 provided on the upper surface of the upper case 2 so as to be openable and closable. It consists of

Inside the vacuum cleaner body 1, there are grid holes 11.
A dust collection chamber 13 and an electric blower chamber 14 are partitioned into a front and rear part by a partition wall 12 having a diameter, and an exhaust chamber 16 communicating with an exhaust port 15 is formed at a rear portion communicating with the electric blower chamber 14.

A rotary body 22 having a suction port 21 communicating with the dust collection chamber 13 is rotatably attached to the lid body 4, and a hose (not shown) is inserted and connected to the suction port 21 of the rotary body 22. It has become so.

A dust collection bag 23 is removably attached to the dust collection chamber 13, and a grid hole 1 is provided in the front of the partition wall 12.
An auxiliary filter 24 covering the filter 1 is detachably attached.

An electric blower 31 is housed in the electric blower chamber 14, with its front suction side communicating with the dust collection chamber 13 and its rear exhaust side communicating with the exhaust port 15. This electric blower 31 is provided with a fan section 32 on the front intake side and an electric section 33 on the rear exhaust side, and the fan section 32 is formed to have a larger diameter than the electric section 33. The fan unit 32 includes a fan (not shown) rotated by an electric unit 33 and a fan cover 34 that covers this fan.
As the fan rotates, the fan cover 34
The air in the dust collection chamber 13 is sucked in from the suction port 35 at the center of the front surface of the fan, and is discharged from the outer periphery of the fan through the inside of the fan cover 34 and into the inside of the electric part 33. The electric part 33 covers a rotor and a stator (not shown) with a frame 36. This frame 36 is connected to the rear part of the fan cover 34, and the air sent from the fan to the outer peripheral surface of the frame 36 is directed into the electric blower chamber 14. A plurality of ejection ports 37 are formed to eject into the air.

A vibration isolator 41 is attached to the fan cover 34 of the electric blower 31. This vibration isolating material 41 is shown in FIG.
As shown in FIG. 2, the peripheral surface part 42 is made of elastic rubber and is joined to the outer peripheral surface of the fan cover 34, the front part 43 is joined to the front periphery of the fan cover 34, and the rear part 43 is joined to the rear periphery of the fan cover 34. It is integrally formed with a rear surface part 44. Plane portions 45 are formed on both sides of the peripheral surface portion 42 . Note that this vibration isolating material 41 and fan cover 34
is fixed with adhesive or double-sided tape.

[0023] Also, in the electric blower room 14, a vibration isolating material 41 is provided.
A front support wall portion 51 that supports the front surface of the fan cover 34 of the electric blower 31 through the support wall portion 51, a rear support wall portion 52 that supports the rear surface of the fan cover 34, and a center support portion that supports the peripheral surface between the support wall portions 51 and 52. A wall portion 53 is provided in a protruding manner.

The front support wall portion 51 includes ribs 5 integrally formed to protrude from the inner surfaces of the upper case 2 and the lower case 3.
4 and 55 are butted against each other, and a circular opening 56 is formed between both ribs 54 and 55. Further, the rear support wall portion 52 covers substantially the entire rear surface of the fan cover 34 of the electric blower 31, and is constructed by butting ribs 57 and 58 integrally formed from the inner surfaces of the upper case 2 and the lower case 3. , an opening 59 having a diameter slightly larger than the diameter of the electric part 36 is formed between both ribs. Further, the central support wall portion 53 is constructed by butting ribs 60 and 61 integrally formed from the inner surfaces of the upper case 2 and the lower case 3, and the peripheral surface of the vibration isolating material 41 is fitted between the ribs 60 and 61. A mating opening 62 is formed, and flat portions 63 are formed on both side edges of this mating opening 62.

An exhaust frame 71 is attached to the exhaust chamber 16, and a vent 72 is formed in the exhaust frame 71. A filter 73 is attached to the inside of the vent 72.
A silencing part 74 is provided facing outward, and this silencing part 7
Exhaust ports 15 are formed at the top and bottom of 4 to communicate with the vents 72.

Next, the operation of this embodiment will be explained.

In the electric blower 31, the outer periphery of the fan cover 34 is covered with a vibration isolating material 41, and when the vacuum cleaner main body 1 is housed in the electric blower chamber 14, the front support wall 51 and the rear support wall are separated. 52, the fan cover 34 is supported in the front-rear direction, and the fitting opening 6 of the central support wall 53
The circumferential surface of the fan cover 34 is fitted to 2 to support it in the vertical and horizontal directions, and the flat part 63 of the central support wall part 53 and the flat part 45 of the vibration isolating material 41 are fitted to prevent rotation. Supported. Therefore, the electric part 33 on the rear side of the electric blower 31 is placed floating in the center of the electric blower chamber 14.

Then, by operating the electric blower 31, dust is sucked together with air from the hose connected to the suction port 21 and the suction port at the end of the hose, and the dust is captured in the dust collection bag 23 of the dust collection chamber 13. The air filtered by the dust collection bag 23 is sucked into the electric blower 31 through the auxiliary filter 24 and the grid holes 11. In the electric blower 31, the air sucked in from the suction port 35 by the high speed rotation of the fan is discharged from the outer periphery of the fan into the electric part 33, cools the electric part 33, and flows out from the discharge port 37 into the electric blower chamber 14. Furthermore, the air flowing out into the electric blower room 14 is filtered through a filter 7.
3. After the sound is muffled by hitting the muffling section 74 through the vent 72, it is exhausted to the outside from the exhaust ports 15 above and below the muffling section 74.

Therefore, there is no wall or the like in the air passage between the rear exhaust side of the electric blower 31 and the exhaust chamber 16, and the area of the exhaust air passage can be made larger than in the past.
Exhaust resistance can be reduced and the suction and exhaust efficiency of the vacuum cleaner can be improved.

[0030] The electric blower 31 is also mounted on a fan cover 34.
Since the electric part 33 is supported by the motor part 33 and placed in a floating state in the center of the electric blower chamber 14, the heat generated in the electric blower chamber 14 can be effectively released, and the electric part 33 can be prevented from overheating. can be reliably prevented.

Furthermore, since the rear support wall portion 52 covers substantially the entire rear surface of the fan cover 34 of the electric blower 31 via the vibration isolating material 41, the noise generated by the rotation of the fan is transmitted into the electric blower room 14. Leakage to the outside through the exhaust port 15 can be reduced.

[0032]

According to the invention of claim 1, the fan section of the electric blower housed in the electric blower chamber of the vacuum cleaner body is provided with a vibration isolating material that covers at least the front edge and the rear edge. The front and rear parts of the fan unit are supported by the front support wall and rear support wall provided in the room via vibration isolating material, so there is no need to support the electric part of the electric blower that protrudes into the room. , there are no walls inside the electric blower room between the rear exhaust side of the electric blower and the exhaust port, making the area of the exhaust air passage larger than before, reducing exhaust resistance, and improving the air intake and exhaust of the vacuum cleaner. Efficiency can be improved. Moreover, the heat generated in the electric part of the electric blower can be efficiently released into the electric blower room, and overheating of the electric part can be reliably prevented.

According to the invention of claim 2, in the invention of claim 1, since the rear support wall portion covers substantially the entire rear surface of the fan portion of the electric blower via the vibration isolating material, vibrations caused by rotation of the fan can be avoided. It is possible to reduce noise transmitted into the electric blower room and leaked outside through the exhaust port.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a vacuum cleaner of the present invention.

FIG. 2 is a partial perspective view.

FIG. 3 is a cross-sectional view of a portion of the vehicle as seen from the front.

FIG. 4 is a cross-sectional view of a portion of the vehicle as seen from the rear.

[Explanation of symbols]

1 Vacuum cleaner body 14 Electric blower room 15 Exhaust port 21 Suction port 31 Electric blower 32 Fan section 33 Electric part 34 Fan cover 41 Vibration isolation material 51 Front support wall 52 Rear support wall

Claims (2)

[Claims] [Claim 1] An electric blower chamber that communicates with a suction port and an exhaust port is provided in a vacuum cleaner body, and a front suction side of the electric blower chamber is communicated with the suction port, and a rear exhaust side of the electric blower chamber is communicated with the exhaust port. In a vacuum cleaner containing an electric blower, the electric blower is provided with an electric part on the rear exhaust side, and a fan part with a fan rotated by the electric part and a fan cover that covers the fan on the front intake side, A vibration isolating material is provided to cover at least a front peripheral edge and a rear peripheral edge of the fan section of the electric blower, and a front support wall part that supports the front and rear parts of the fan section in the electric blower chamber via the vibration isolating material. and a vacuum cleaner characterized by having a rear support wall section. 2. The vacuum cleaner according to claim 1, wherein the rear support wall portion covers substantially the entire rear surface of the fan portion via a vibration isolating material.