JP3192063B2 - Vacuum cleaner suction and vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port for a vacuum cleaner and a vacuum cleaner using the suction port, and in particular, to generate a rotational torque by blowing air into an impeller for rotating a rotary brush provided in the suction port. It relates to improvement of air turbines.

[0002]

2. Description of the Related Art In order to suck in dust in long fibers of a carpet, a vacuum cleaner applies a rotating brush provided at a suction port to a floor surface, and the dust in the fibers is lifted up by an action such as tapping. I try to inhale. As a driving force (rotation torque) for driving the rotating brush, one obtained by an air turbine using air sucked by a vacuum cleaner main body has been put to practical use. In this type, various measures have been taken to suppress the noise while obtaining a rotational torque sufficient to drive the rotary brush. For example, JP-A-61-85
The suction port described in Japanese Patent Publication No. 911 is disclosed in FIGS.
As shown in FIG. 5, a guide arranged in a casing 21 that rotatably supports the impeller 5 so as to gradually approach along the rotating peripheral surface of the impeller 5 from the suction nozzle 22 side to the receiving port 7 side. 23, and the impeller 5
The flow of the inflow air formed along the rotation direction is guided to the impeller 5. The guide 23 effectively causes the airflow around the impeller to act on the impeller 5, and prevents the airflow from colliding with the projection of the receiving port 7 to suppress the generation of noise.

[0003] mouthpiece of the electric vacuum cleaner disclosed in JP-A-7-2 31 866 Patent Publication, although installed off the nozzle from the impeller, the forward rotation direction of the rotary brush sucker The relative speed between the floor and the rotating brush is increased so as to coincide with the operation direction, the dust removing ability when the suction port is advanced is improved, and a high dust removing ability is obtained for the same torque.

The suction port described in Japanese Patent Application Laid-Open No. 6-319669 has a spiral flow path formed by a guide 23 on the impeller side of a nozzle 22 as shown in FIGS. The prevention plate 40 is installed, and the airflow that cannot enter the impeller 5 is captured by the flow path formed by the spiral flow path and the leakage prevention plate 40 and flows into the impeller 5, thereby increasing the generated torque. I have.

FIGS. 18 and 19 show an example of a conventional suction port in which impellers 5 are provided at both ends of a rotating shaft 32 of a rotating brush. This suction port sucks in dust along with the airflow, which is swept up by the rotating brush 3, on the floor surface, and flows the airflow into the air turbine chamber 2 through the opening 37 provided in the partition wall 11 to give the impeller 5 rotational energy. After the mouth 3
It flows into the extension pipe 39 via 8, and is made to be sucked by the vacuum cleaner main body. This suction port has been proposed as a lightweight, easy-to-use, and inexpensive suction port utilizing the feature that the impeller 5 is arranged on the same axis as the rotating shaft 32 of the brush.

[0006]

The rotational torque T generated in the air turbine impeller is:

[0007]

(Equation 1)

## EQU1 ## Here, γ: specific weight of fluid (air) Q _n : flow rate per blade v: flow velocity N: rotation speed g: gravitational acceleration θ: inflow angle of fluid to blade n: number of blades

Therefore, in order to increase the generated torque, it is necessary to take measures such as increasing the flow rate and flow velocity, supplying more airflow to the blades, and maintaining an appropriate airflow inflow angle to the blades. There is.

However, the guide at the suction port shown in FIG. 14 cannot restrict the airflow flowing out to the side without entering the impeller 5, so that only a part of the airflow from the nozzle is directed to the impeller 5. It is not possible to blow in, and a sufficiently large rotational torque cannot be generated.

In the structure shown in FIGS. 16 and 17,
Since the nozzle 22, the guide 23, and the leak prevention plate 40 do not form a continuous and integral structure, the airflow flowing out to the side of the impeller 5 cannot be sufficiently restricted, and the airflow flows out of the nozzle 22. Immediately after that, there is a drawback that a vortex is generated, leading to a decrease in output and an increase in noise.

Further, the conventional suction port shown in FIGS. 18 and 19 has the same problem in the relationship between the opening 37 corresponding to the nozzle and the impeller 5.

[0013] Further, since the various suction ports described above are configured to generate a rotational torque on the impeller by blowing an airflow containing dust into the impeller, dust is caught between the impeller and the guide. It is necessary to provide a large gap so that the rotation is not locked. Therefore, the leakage of the airflow generated in the gap increases, and the airflow acting on the impeller decreases, so that it is difficult to improve the generated torque. Regarding this problem, a solution that forms a bypass passage so as to supply clean air to the impeller is also conceivable,
In a conventional air turbine, if a large amount of airflow necessary to generate sufficient rotational torque is bypassed,
A problem occurs that the dust suction force is reduced.

An object of the present invention is to solve these problems and to provide an air turbine capable of generating a high rotation torque without increasing noise.

It is another object of the present invention to increase the efficiency of an air turbine so that a large rotating torque can be obtained with a small airflow.

Still another object of the present invention is to provide a suction port that can rotate an air turbine by efficiently using clean air containing no dust.

[0017]

One feature of the present invention is that:
An electric motor comprising: an impeller mounted on a rotating shaft; a nozzle for supplying a suction airflow to the impeller to generate a rotational torque on the impeller; and a rotary brush driven by the rotational torque generated by the impeller. In the suction port of the vacuum cleaner, the nozzle is provided along the outer periphery of the impeller to guide the airflow flowing from the inlet and the partition wall where the airflow inlet is formed from the outer periphery of the impeller into the impeller. A guide portion extending so as to wind around the impeller and a side wall for preventing escape of airflow from a side edge of the guide portion are integrally formed. This feature corresponds to claim 1 and will be specifically described with reference to FIGS. The inlet of the nozzle is rounded so as not to cause turbulence in the air flow. This feature is defined in claim 2
And specifically, FIGS. 1, 3 and 4
This will be described with reference to FIG. The nozzle has an inner peripheral wall extending from a side end of the side wall so as to face the outer peripheral surface of the impeller, and is formed so as to extend in a circumferential direction on the inner peripheral wall to flow air toward the impeller. It is characterized by having an opening for spouting. This feature corresponds to claim 3 and will be specifically described with reference to FIGS. Further, the cross-sectional area of the flow path of the nozzle is gradually reduced according to the winding angle θ of the nozzle with respect to the outer periphery of the impeller. This feature corresponds to claim 4 and will be specifically described with reference to FIGS. In addition, the flow path cross-sectional area S at the inlet of the nozzle is set to 15
And characterized in that a 0mm ² ~250mm ^2. This feature corresponds to claim 5 and will be specifically described with reference to FIGS. Further, the gap between the guide portion of the nozzle and the outer periphery of the impeller is gradually reduced. This feature corresponds to claim 6 and will be specifically described with reference to FIGS. Further, the cross-sectional area of the flow path of the nozzle is gradually reduced by gradually reducing the lateral width of the nozzle. This feature corresponds to claim 7 and will be specifically described with reference to FIGS. 9 and 10. Also, the gap between the guide portion of the nozzle and the outer periphery of the impeller and the lateral width of the nozzle are gradually reduced, so that the flow path cross-sectional area of the nozzle is gradually reduced. This feature corresponds to claim 8. Specifically, FIG.
This will be described with reference to FIG. Further, the nozzle is formed integrally with the suction case. This feature corresponds to claim 9, and specifically,
This will be described with reference to FIG. Further, the nozzle is formed integrally with a part of a partition wall of the suction case which partitions between a brush chamber of the suction mouth and the air turbine chamber, and is detachable from an upper part of the suction case. This feature corresponds to claim 10 and will be specifically described with reference to FIGS. The rotating brush is connected to the rotating shaft by a belt. This feature corresponds to claim 11.
This will be described specifically with reference to FIG. Further, the rotating brush is attached to the rotating shaft. This feature corresponds to claim 12.

[0018] Another feature of the present invention, an impeller mounted to the rotating shaft, a passage for generating a rotational torque to said impeller to supply airflow suction to the impeller, rotatably mounted in the brush chamber And a rotating brush driven by a rotating torque generated in the impeller, wherein the flow path extends around a plurality of blade spaces of the impeller around the outer periphery of the impeller. A plurality of guide plates provided toward the plurality of wing spaces are provided, and clean air that has been taken in from the air intake formed in the suction case and entered the space behind the plurality of guide plates is provided by the plurality of guide plates. The impeller is configured so as to blow into the plurality of blade spaces from the outer periphery of the impeller so that the airflow in the impeller flows out to the rotating brush chamber. This feature corresponds to claim 13 and will be specifically described with reference to FIGS. Another feature of the present invention is that an impeller mounted on a rotating shaft, a flow path that supplies a suction airflow to the impeller to generate a rotational torque in the impeller, and is rotatably provided in the brush chamber. And a rotating brush driven by a rotating torque generated in the impeller, wherein the flow path is formed on the outer periphery of the impeller over a plurality of blade spaces of the impeller. A plurality of guide plates provided toward the wing space, and a plurality of air intakes formed in a suction case facing the outside of the guide plates, wherein the plurality of air intakes are taken in from the plurality of air intakes. Clean air that has entered the space behind the guide plate is given a direction by the plurality of guide plates and is blown from the outer periphery of the impeller into a plurality of wing spaces, and the air flow in the impeller is And drain it into the rotating brush chamber. It is characterized in.
This feature corresponds to claim 14 and will be specifically described with reference to FIGS. 26 and 27. The guide plate is characterized by being inclined relative to the blades of the impeller. This feature corresponds to claim 15 and will be specifically described with reference to FIGS. Further, the guide plate is provided at a pitch that does not coincide with the blade of the impeller at a plurality of locations at the same time. This feature corresponds to claim 16 and will be specifically described with reference to FIGS. Also,
The air intake is widened to the rear of the brush chamber and opened. This feature corresponds to claim 17 and will be specifically described with reference to FIGS. 36 and 37. Further, a filter is provided in the opening of the air intake. This feature corresponds to claim 18. Specifically, FIG. 36 and FIG.
This will be described with reference to FIG. Further, the impeller is smoothly curved so that the depth of the base of the blade becomes deeper at the axial center, and the axially outer region of the blade where air is blown is inclined with respect to the guide plate. The inner region from which air in the wing space flows out is formed parallel to the rotation axis. This feature corresponds to claim 19, and will be specifically described with reference to FIGS.
Further, an auxiliary wing extending in a circumferential direction is formed at an outer peripheral edge of an inner region of the wing. This feature corresponds to claim 20. Specifically, FIG.
This will be described with reference to FIG. Further, the impeller and the flow path are provided at both ends of a rotating shaft that supports a rotating brush. This feature corresponds to claim 21 and will be specifically described with reference to FIG.
Further, the bearing unit supporting both ends of the rotating shaft,
It is characterized in that it is held so as to be separable by a vertically divided suction case. This feature corresponds to claim 22. Specifically, FIG. 34 and FIG.
This will be described with reference to FIG. And the vacuum cleaner of the present invention,
It is characterized by having such a suction port. This feature corresponds to claim 23.

[0019]

The nozzle and the guide plate effectively blow the flowing airflow into the impeller to generate a large rotational torque.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing the overall appearance of the vacuum cleaner according to the present invention. 101 is the main body of the vacuum cleaner, 1
02 is a hose, 103 is a remote control switch provided on the hose hand, 104 is an extension tube, and 201 is a suction port.

The airflow sucked together with dust from the suction port 201 when the main body 101 of the electric vacuum cleaner is in the operating state is passed through the extension pipe 104 and the hose 102 to the main body 101 of the electric vacuum cleaner.
And is discharged after dust is collected. The operation of the vacuum cleaner main body 101 is controlled by a command from a remote control switch 103.

FIG. 1 is a perspective view showing an embodiment of the internal structure of the suction port 201, FIG. 3 is a longitudinal sectional side view thereof, and FIG. 4 is a sectional view taken along line AA in FIG.

As shown in FIG. 1, the inside of the suction port 201 is roughly divided into an adjacent brush chamber 1 and an air turbine chamber 2, and a partition wall 11 between the brush chamber 1 and the air turbine chamber 2 has a main nozzle 4.
And a sub nozzle 12 are provided. A rotating brush 3 is rotatably installed in the brush chamber 1 having an open floor, and an impeller 5 having a plurality of blades is installed in the air turbine chamber 2.

In the air turbine chamber 2, an impeller peripheral flow path 6 for flowing air around the impeller 5 is provided, and on the downstream side thereof, the air flow is collected and guided to the vacuum cleaner main body 101. A mouth 7 is provided. The impeller 5 is attached to an impeller rotating shaft 8, and the impeller rotating shaft 8 is connected to the rotating brush 3 by a timing belt 9.

The sub-nozzle area switching plate 13 is slidably provided along the partition wall 11 and has a knob 14 protruding outside the case.
Is operated to close a part of the inflow channel of the sub-nozzle 12 and change the cross-sectional area of the channel. Such components are housed in the suction case 10.

When the vacuum cleaner is activated and a suction force is generated in the vacuum cleaner main body 101, the suction air flow is changed from the floor side opening of the suction case 10 to the brush chamber 1.
→ main nozzle 4 → impeller 5 → impeller peripheral flow path 6 → path of receiving port 7 and brush chamber 1 → sub nozzle 12 → impeller peripheral flow path 6
→ It flows through the two paths of the receptacle 7 and is sucked into the main body 101 of the vacuum cleaner from the receptacle 7.

As shown in detail in FIG. 3 and FIG. 4, the main nozzle 4 gradually reduces the facing gap between the air flow inlet 17 and the axial center of the impeller 5 along the outer periphery thereof. A guide portion 15 extending so as to wind around the impeller 5
And a nozzle side wall portion 16 extending toward the outer periphery of the impeller 5 so as to prevent the air flow from escaping from both side edges of the guide portion 15 and having a leading end edge facing the outer periphery with a small gap. And are integrally formed. The flow path of the main nozzle 4 is elongated along the outer periphery of the impeller 5 to blow air into the impeller 5.

The air turbine in this embodiment has a diameter of the impeller 5: d = 34 mm, a width (length in the axial direction) of the impeller 5: w = 60 mm, and an inner wall width at the inlet of the main nozzle 4: b = 13 mm. The height of the inner wall of the inlet of the main nozzle 4 was set to h = 12 mm.

The air turbine thus configured is
The airflow sucked from the inflow port 17 is accelerated by the flow path gradually reduced by the guide portion 15 and then blown into the impeller 5 from the opening between the nozzle side wall portions 16. The air flow sequentially flows into the blade spaces 5 a to 5 d of the impeller 5 to give work to the impeller 5, and then from the protruding portions of the impeller 5 to the outside of both nozzle side walls 16, the inside of the turbine chamber 2. Out of the flow path 6.

FIG. 20 shows this state. All of the airflows 30 blown out from the main nozzles 4 sequentially flow into the blades of the impeller 5 and flow along the curved portion at the base of the blades while transmitting the energy due to the collision as power to the impellers 5. Finally, the airflow is turned in the opposite direction to the inflow direction and discharged. At this time, the wings use the reaction force of the airflow discharged in the opposite direction as power. The discharged airflow is then sequentially sucked from the receiving port 7.

On the other hand, in the case of a guide having no side wall,
As shown in FIG. 21, a large amount of airflow 31 flows over the impeller 5 without being able to enter the impeller 5, and the airflow 31 interferes with the airflow 30 that is about to flow out of the impeller 5, causing a large turbulence. Occurs.

The suction port 201 in this embodiment can effectively make the air flow act on the impeller 5, so that the flow rate and the flow velocity are not increased, and therefore, the noise level is not increased, and the suction port 201 is compared with the conventional one. A high torque output of about 50% or more is obtained.

The main nozzle 4 described above is partially or entirely integrated with the suction case 10 (partition wall 11) to reduce the number of parts, thereby reducing the cost of the suction nozzle 201.
Can be provided.

According to this embodiment, the following effects can be obtained.

The circumferential velocity component of the air flow in the main nozzle 4 is kept constant, and the velocity component in the radial direction is
It is determined on the condition that all of the airflow that has entered inside flows into the impeller 5. Therefore, the speed of the air flow acting in the impeller 5 can be set higher than the nozzle flow speed. Therefore, the friction loss of the airflow passing through the main nozzle 4 can be reduced. In addition, the flow is at several places (four places in this embodiment).
Flows into the wing spaces 5a to 5d, the flow does not suddenly decelerate at the entrance of the impeller 5, the noise generated by the turbulence of the flow can be reduced, and the outflow speed of the airflow from the impeller 5 Can be set high, so that a large rotational torque can be obtained. In addition, a large flow area can be provided at the entrance of the main nozzle 4, and since the entrance of the main nozzle 4 is rounded, separation of the flow at the entrance of the nozzle and generation noise can be suppressed. . Further, most of the airflow sucked from the main nozzle 4 passes through the inside of the impeller 5, so that a larger rotation torque can be obtained.

Next, another embodiment will be described with reference to FIGS. FIG. 5 is a vertical cross-sectional side view of the suction port 201, and FIG. 6 is a cross-sectional view of the main nozzle 4 and the impeller 5 taken along a cutting line BB shown in FIG.

The feature of this embodiment is that an inner peripheral wall portion 18 extends from the leading edge of the nozzle side wall portion 16 so as to face the outer peripheral surface of the impeller 5, and the inner peripheral wall portion 18 is formed to extend in the circumferential direction. Opening 1 for blowing airflow toward the impeller 5
9 is provided in the shape of the main nozzle 4. Since other components are common to the above-described embodiment, the same reference numerals are given and duplicate explanations are omitted.

The air flow sucked from the inlet 17 flows through the flow path surrounded by the guide portion 15, the nozzle side wall portion 16, and the inner peripheral wall portion 18 facing the outer peripheral surface of the impeller, and flows into the impeller 5 through the opening 19. . In the main nozzle 4 having this shape, the airflow that cannot flow into the impeller 5 flows downstream of the main nozzle 4 without being pushed out from the opening 19, and flows into the impeller 5 therefrom. Therefore, the ratio of the airflow flowing into the impeller 5 is greatly increased, and a larger rotation torque can be generated.
Further, since the airflow has components in the tangential direction and the direction of entering the inside, the flow velocity at the outlet of the main nozzle 4 can be further increased, and the generated torque further increases. In addition, since the airflow flows into the plurality of blade spaces of the impeller 5, noise can be suppressed to a small amount depending on the magnitude of the generated torque.

Another embodiment will be described with reference to FIGS. FIG. 7 shows the impeller 5 and the main nozzle 4 in the suction port 201, and FIG. 8 is a sectional view taken along the line CC in FIG. This embodiment is characterized by the setting of the gradually decreasing characteristics of the gradually decreasing flow path cross-sectional area in the main nozzle 4 in each of the above-described embodiments. The same components as those in the above-described embodiments are denoted by the same reference numerals, and redundant description will be omitted or omitted.

The flow path in the main nozzle 4 is formed inside the guide portion 15 and the side wall portion 16 and is opened so as to blow air to the outer periphery of the impeller 5. Although the width of this flow path is constant, the height h _θ of the guide portion 15 in the radial direction of the impeller 5 (height of the cross section of the nozzle flow path) becomes smaller as it goes downstream, so that the main nozzle 4 and the blade The cross-sectional area of the passage formed by the vehicle 5 gradually decreases as going downstream. Note that the same is true even when the inner peripheral wall portion 18 facing the outer peripheral surface of the impeller 5 is directly opposed.

The main nozzle 4 is provided with a cross-sectional area S
Was a 150mm ² ~250mm ^2, the flow path cross-sectional area gradually decreases in accordance with the winding angle θ to the outer periphery of the impeller 5 of the main nozzle 4. The flow path cross-sectional area S _{θ at} a position at an angle θ from the inflow port 17 of the main nozzle 4 is the flow path cross-sectional area S of the inflow port 17.
_max and the angle θ _max from the inlet 17 to the end of the nozzle

[0043]

(Equation 2)

As shown in FIG.

Such a gradual decrease in the cross-sectional area of the flow passage is achieved by the impeller 5
This can be realized by configuring the guide portion 15 of the main nozzle 4 facing the outer periphery of the asymptotically asymptotically. The height h of the nozzle channel cross section at an angle θ from the inlet 17
_θ is _defined as the width b between the side walls and the cross-sectional area S of the flow path at the inlet 17.
_max , the angle θ from the nozzle inlet 17 to the nozzle end
_In relation to _max

[0046]

(Equation 3)

It is realized by changing as shown in FIG.

In this embodiment, the cross-sectional area of the flow passage is reduced uniformly, and the circumferential direction of the air flow in the flow passage is made substantially uniform. For this reason, the airflow flowing between the blades of the impeller 5 becomes substantially equal between the blades, and the speed does not become abnormally high, so that noise can be suppressed. Further, since a large amount of airflow can be blown into the impeller 5, a large rotational torque can be obtained.

Another embodiment will be described with reference to FIGS. 9 and 10. FIG. 9 shows the impeller 5 and the main nozzle 4 in the suction port 201, and FIG. 10 is a sectional view taken along the line DD in FIG.

In this embodiment, the guide portion 15 is attached to the main nozzle 4.
And the side wall portion 16 is provided, the cross-section of the flow path has a width gradually reduced and in As toward the downstream side of the flow path gradually decreases as the further height h _theta also toward the downstream in the radial direction of the impeller 5. Therefore, the cross-sectional area of the flow path in the main nozzle 4 including the main nozzle 4 and the impeller 5 gradually decreases toward the downstream.

The impeller 5 may be provided with an inner peripheral wall 18 facing the outer periphery.

This embodiment has a configuration in which the cross-sectional area of the flow path is gradually and uniformly reduced, and the circumferential component of the airflow in the flow path is made substantially uniform. For this reason, the airflow flowing into the blade space of the impeller 5 becomes substantially equal in each blade space, and the speed does not become abnormally high, so that noise can be suppressed. Further, since a large amount of airflow can be blown into the impeller 5, a large rotational torque can be obtained.

Another embodiment will be described with reference to FIG. FIG. 11 is a vertical sectional side view of the suction opening 201. The guide part 15 and the nozzle side wall part 16 of the main nozzle 4
Suction case 1 which is divided into upper and lower parts at the position of
0 and integrally formed. Further, a portion corresponding to the lower surface of the main nozzle 4 is configured to be continuous from the partition wall 11. The function of the main nozzle 4 is the same as that of the embodiment shown in FIGS.

In this embodiment, since the suction case 10 and the main nozzle 4 are integrally formed, the weight can be reduced and the number of parts can be reduced.
The production cost can be reduced, for example, because there is no need to perform an operation for connecting the main nozzle 4 and the main nozzle 4.

Another embodiment will be described with reference to FIGS. FIG. 12 is a vertical sectional side view of the suction opening 201.
The feature of this embodiment resides in that the inside of the main nozzle 4 is opened so that maintenance work for removing dust accumulated inside the main nozzle 4 is facilitated. The side wall portion 16 of the main nozzle 4 is formed integrally with the suction case 10, and a portion corresponding to the lower surface of the main nozzle 4 is formed integrally with the partition wall 11 in a continuous shape. The guide portion 15 is configured so as to be detachably locked to the suction case 10 by hooks 20 and 24 having a spring property to close the outer periphery of the side wall portion 16 and to bend the hooks 20 and 24 inward. Suction case 1
It is possible to disengage with 0 and take out independently. The function of the main nozzle 4 with respect to the impeller 5 is the same as that of the embodiment shown in FIGS.

In this embodiment, when dust accumulates inside the main nozzle 4 or around the impeller 5, as shown in FIG. Can be taken out. In addition, since the nozzle portion can be easily opened and closed without using a tool, maintenance workability against dust clogging and the like can be improved, and a convenient suction port can be provided.

The same effect can be obtained even if the main nozzle 4 in each of the above-described embodiments is mounted on the suction port where the impeller 5 and the rotary brush 3 are mounted on the same axis.

Still another embodiment will be described with reference to FIGS. The suction port 201 of this embodiment is configured by attaching the impeller 5 to both ends of the rotating shaft 32 of the rotating brush 3.
It is configured to obtain a rotational torque for driving the rotary brush 3 by a set of air turbines, and the air blown into the impeller 5 is designed so that clean air can be used. FIG. 22 is a perspective view showing the internal configuration of the suction port 201 in a see-through manner, FIG. 23 is a vertical sectional side view of the impeller part, and FIG.
Is a longitudinal side view of the rotating brush part, and FIG. 25 is a longitudinal front view showing the impeller part in detail. The description of the constituent means common to the constituent means of the above-described embodiment will be omitted.

The rotary brush 3 is installed in the suction opening 201 so as to cross the brush chamber 1. This rotating brush 3
The rotatable shaft 32 protruding from both ends is attached to the suction case 34 by the bearing unit 42 and is rotatably supported. At both ends of the rotating shaft 32, impellers 5 constituting an air turbine that generates a rotating torque by applying a part of the air sucked by the vacuum cleaner main body 1 are attached.

As shown in FIG. 24, the brush chamber 1 is opened toward the floor surface 36 on the lower surface of the suction opening 201, and the flocking or blades of the rotating brush 3 act on the floor surface 36 to cause the floor surface 36 to rotate. Is provided, and a dust suction opening 26 for sucking the scraped dust together with the surrounding air is provided.

In the vicinity of the impeller 5, FIG.
As shown in FIG. 5, clean air sucked from an air inlet 35 formed in a rear portion of the suction case 34 is supplied to the impeller 5.
A plurality of guide plates 33 are provided so as to be directed so as to blow from the outer periphery of the axially outer region of the impeller 5. The clean air sucked from the air inlet 35 formed in the suction case 34 enters a wide area of the space behind the guide plate 33. Then, according to the direction of the guide plate 33, the impeller 5 flows into the wing spaces 5a to 5e of the impeller 5 from a wide range (about 250 degrees in this embodiment) of the outer periphery thereof, and the shaft 5 The power is transmitted to the impeller 5 while flowing toward the inner region in the direction, flows out of the impeller 5 toward the center of the brush chamber 1, passes from the receiving port 7 through the extension pipe 104 to the vacuum cleaner main body 101. Inhaled.

The dust blown out by the rotating brush 3 is collected mainly by the air sucked from the dust suction opening 26, but the air flowing from the impeller 5 in the brush chamber 1 is also collected in the brush chamber 1. Receiving waste 7
Acts as an airflow to be transported toward.

In this embodiment, since the airflow blown into the impeller 5 is caused to flow from a wide area on the outer periphery of the impeller 5,
A large rotation torque can be generated by effectively using the flow of clean air taken in from the air intake 35.
Moreover, the air flowing out of the impeller 5 into the brush chamber 1 is
It is used to carry dust in the brush chamber 1. As described above, if the air acting on the impeller 5 is made clean, dust adheres to the wing space of the impeller 5 or to a stationary member such as the guide plate 33, so that free ventilation and rotation are hindered. The shape of the impeller 5 and the guide plate 33
It is easy to set the shape or the gap between the two to a value suitable for generating the maximum torque, and it is possible to generate the necessary rotational torque with a small suction airflow.

When the gap between the outer peripheral end of the blade of the impeller 5 and the inner peripheral end of the guide plate 33 is reduced, if the two coincide at the same time at a plurality of places, the generated noise increases. In this embodiment, the blades of the impeller 5 and the guide plate 33 are formed at pitches that do not match at a plurality of locations in order to prevent the generation of such noise. Specifically, the blades of the impeller 5 were formed at a pitch of 36 degrees, and the pitch of the guide plate 33 was set at 19 degrees.

FIG. 26 shows the suction case 3 for taking in the clean air blown into the impeller 5 in the above embodiment.
FIG. 4 shows a modification in which a plurality of air intakes 35a, 35b, 35c are formed.

The suction port shown in FIG. 27 is a modification in which the top plate of the suction case 34 is lowered in order to reduce the height of the suction port 201 in the above embodiment. Is divided into two areas, front and rear,
In order to take in the clean air blown into each area, two air intakes 35d, 35
This is a configuration in which e is formed.

FIG. 28 shows a suction case 34 for taking in clean air blown into the impeller 5 in the above embodiment.
This shows a modification in which a plurality of air inlets 35e, 35f, and 35g provided in the nozzle are formed in a nozzle shape.

FIGS. 29 to 33 show the shapes of the impeller 5 which are advantageous for efficiently generating a large rotational torque. 29 is a perspective view of the impeller 5, FIG. 30 is a front view of the impeller shown in FIG. 29, FIG. 31 is a sectional view taken along the line EE in FIG. 30, FIG. 32 is a sectional view taken along the line FF in FIG. It is GG sectional drawing. Note that a description of components common to the above-described components is omitted.

In this impeller 5, as shown in FIG. 31, the depth of the base of the blade 5g is different at each position in the axial direction.
It is the deepest in the center and smoothly curved so that both sides are shallow. Then, the axial direction of the inner region (rotating brush 3 side area) 5g ₁ of each wing 5g in a state fitted with the impeller 5 to the rotating shaft 32, as shown in FIGS. 30 and 32,
Is formed so as to be parallel to the rotation axis, aileron 5 g ₂ extending in the circumferential direction is formed at the outer peripheral end portion. In addition, the outer region in the axial direction (region on the anti-rotation brush 3 side) 5 g ₃
Are formed so as to be inclined with respect to the guide plate 33.

When the electric vacuum cleaner main body 101 operates to generate a suction airflow, the air directed by the guide plate 33 is displaced in the axially outer region 5 g on the outer periphery of the impeller 5.
_It is blown into the impeller 5 from ₃ toward the rotation direction.
At this time, since the opposing inclined so as to intersect the blade 5 g ₁ and the guide plate 33, occurrence of noise is small. The airflow that has flowed into the impeller 5 is guided by the curved base portion in the blade space and smoothly turns inward in the axial direction, so that the impeller 5 efficiently generates a rotational torque. Impeller 5
Air flowing through the inner is flows out axially inner region 5 g _1, at this time, further to generate a rotational torque acts on the aileron 5 g ₂ formed in the region. Therefore, the impeller 5 is quiet and has a characteristic of generating a large rotational torque by using a small airflow efficiently, so that the dust collection opening 26 is formed.
This is suitable for the suction port 201 configured to rotate the impeller 5 using clean air that does not pass through.

Since lint, hair, and the like are entangled with the rotating brush 3, it is preferable that the rotating brush 3 be detachable to remove these. FIGS. 34 and 35 show a suction port 201 in which the suction case 34 is divided into an upper case 34a and a lower case 34b, and the bearing unit 42 is sandwiched between the divided edges 34e.
Is shown. The guide plate 33 includes a first group 33a attached to the upper case 34a and a first group 33a attached to the lower case 34b.
Group 33b.

With this configuration, as shown in FIG. 35, by separating the upper case 34a and the lower case 34b, the impeller 5 can be taken out together with the rotating brush (not shown) and cleaned.

As described above, in the suction port 201 for blowing the clean air into the impeller 5 by the suction force of the vacuum cleaner main body 101 to rotate the impeller 5, the air intake for taking the clean air into the air turbine is large. It is desirable that the ventilation resistance is small in the cross-sectional area of the flow path. FIGS. 36 and 37 show a suction port 2 which can solve such a problem.
01 shows an example. FIG. 36 is an external perspective view of the suction port 201, and FIG. 37 is a sectional view taken along line HH in FIG. In addition, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will be omitted, or the illustration will be omitted.

The suction port 201 has a large air intake 35.
In order to form h, the intake box portion 34c is formed integrally with the suction case 34 from the turbine chamber to the rear position of the brush chamber.
Is formed. A grid 34d is formed integrally with the opening (air inlet) 35h, and a filter 43 is provided inside the grid 34d to prevent foreign substances from entering and further ensure safety against the human body. This large air intake 35
Since h can be configured by utilizing the space existing behind the suction case 34, the external shape of the suction hole 201 is not significantly increased.

[0075]

According to the present invention, an air flow generated by a suction force of a vacuum cleaner main body can be effectively guided to an impeller to generate a high rotational torque in a suction opening for driving a rotary brush using an air turbine. it can. For this reason, the rotating brush provided in the mouthpiece can be rotated without difficulty even on a floor surface condition showing high resistance to the rotation, such as a carpet with long hairs, and it can sunk deeply into the carpet. You can hit the garbage.

Thus, the vacuum cleaner provided with the mouthpiece according to the present invention can increase the cleaning efficiency and greatly reduce the cleaning work.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an internal structure of a suction port for a vacuum cleaner according to the present invention.

FIG. 2 is an external perspective view of the vacuum cleaner according to the present invention.

FIG. 3 is a vertical sectional side view of the mouthpiece shown in FIG. 1;

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a vertical sectional side view showing another embodiment of the suction port for a vacuum cleaner according to the present invention.

FIG. 6 is a sectional view taken along line BB in FIG.

FIG. 7 is a front view showing an opposing relationship between a nozzle and an impeller showing another embodiment of the suction port for a vacuum cleaner according to the present invention.

8 is a sectional view taken along the line CC in FIG. 7;

FIG. 9 is a front view showing a facing relationship between a nozzle and an impeller according to another embodiment of the suction port for a vacuum cleaner according to the present invention.

FIG. 10 is a sectional view taken along the line DD in FIG. 9;

FIG. 11 is a vertical sectional side view showing another embodiment of the suction opening for a vacuum cleaner according to the present invention.

FIG. 12 is a vertical sectional side view showing another embodiment of the suction opening for a vacuum cleaner according to the present invention.

FIG. 13 is a vertical sectional side view showing a state where a guide portion of a main nozzle of a suction opening in the embodiment shown in FIG. 12 is removed.

FIG. 14 is a vertical side view of a conventional vacuum cleaner suction port.

FIG. 15 is a perspective view of a guide employed in a conventional vacuum cleaner suction opening.

FIG. 16 is a vertical sectional side view of another conventional vacuum cleaner suction port.

17 is a sectional view taken along the line ZZ in FIG.

FIG. 18 is a cross-sectional plan view of still another conventional vacuum cleaner suction port.

19 is a sectional view taken along the line YY in FIG.

FIG. 20 is a plan view showing the flow of air in the suction port for a vacuum cleaner according to the present invention.

FIG. 21 is a plan view showing the flow of air in a conventional vacuum cleaner suction port.

FIG. 22 is a perspective view showing the inside of still another embodiment of the suction opening for a vacuum cleaner according to the present invention.

23 is a vertical sectional side view of an impeller portion in the vacuum cleaner suction port shown in FIG. 22.

24 is a vertical sectional side view of a rotating brush portion in the suction opening for a vacuum cleaner shown in FIG. 22.

FIG. 25 is a longitudinal sectional front view showing in detail an impeller portion in the vacuum cleaner suction port shown in FIG. 22.

26 is a vertical sectional side view showing a modified example of the impeller unit in the embodiment shown in FIG. 23.

FIG. 27 is a longitudinal sectional side view showing still another modified example of the impeller unit in the embodiment shown in FIG. 23.

FIG. 28 is a longitudinal sectional side view showing still another modification of the impeller unit in the embodiment shown in FIG. 23;

FIG. 29 is a perspective view of the impeller at the suction port for the vacuum cleaner shown in FIG. 22.

30 is a front view of the impeller shown in FIG. 29.

FIG. 31 is a sectional view taken along the line EE in FIG. 30;

32 is a sectional view taken along line FF in FIG. 30.

FIG. 33 is a sectional view taken along the line GG in FIG. 30;

FIG. 34 is a side view showing another embodiment of the suction port for a vacuum cleaner according to the present invention.

FIG. 35 is a side view showing a maintenance disassembled state of the vacuum cleaner suction port shown in FIG. 34;

FIG. 36 is a perspective view showing another embodiment of the suction opening for a vacuum cleaner according to the present invention.

FIG. 37 is a sectional view taken along line HH in FIG. 36;

[Explanation of symbols]

1 ... brush room, 2 ... air turbine room, 3 ... rotating brush,
4 main nozzle, 5 impeller, 5a to 5e impeller blade space, 6 impeller peripheral flow path, 7 receiving port, 8 rotating shaft, 10
... Suction case, 11 ... Partition wall, 15 ... Guide, 16 ...
Nozzle side wall, 17 ... inflow port, 201 ... suction port.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigenori Sato 502 Kandate-cho, Tsuchiura-city, Ibaraki Pref.Hitachi, Ltd.Mechanical Research Laboratory Co., Ltd. Within the research institute (72) Inventor Masao Sunagawa 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Within the Electric Appliances Division, Hitachi, Ltd. (72) Inventor Wataru Yamamoto 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Stock (72) Inventor Atsushi Yamaguchi 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Pref. Hitachi Electronics Co., Ltd. Electrical Equipment Division (56) References JP-A-1-58223 (JP, A) JP-A-63-43632 (JP, A) JP-A-7-59688 (JP, A) JP-A-7-59690 (JP, A) JP-A-2 JP-A-92324 (JP, A) JP-A-1-308515 (JP, A) JP-A-7-231866 (JP, A) JP-A-54-98939 (JP, U) JP-B 5-52209 (JP, B2) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A47L 9/04

Claims (23)

(57) [Claims] An impeller mounted on a rotating shaft, a nozzle for supplying a suction airflow to the impeller to generate a rotational torque on the impeller, and a rotary brush driven by the rotational torque generated on the impeller Wherein the nozzle is provided with a partition wall in which an airflow inlet is formed and the impeller for guiding an airflow flowing from the inlet into the impeller from an outer periphery of the impeller. A suction portion for a vacuum cleaner, wherein a guide portion extending so as to wind around the impeller along an outer periphery of the impeller and a side wall for preventing escape of airflow from a side edge of the guide portion are integrally formed. 2. The suction port for a vacuum cleaner according to claim 1, wherein the inlet of the nozzle is rounded so as not to cause turbulence in the air flow. 3. The nozzle according to claim 1, wherein the nozzle is formed so as to extend from a side end of the side wall so as to face the outer peripheral surface of the impeller, and to extend in a circumferential direction on the inner peripheral wall. An inlet for an electric vacuum cleaner, comprising an opening for blowing out an air current toward the impeller. 4. A suction port for a vacuum cleaner according to claim 1, wherein the cross-sectional area of the flow passage of the nozzle is gradually reduced in accordance with the winding angle θ of the nozzle with respect to the outer periphery of the impeller. . 5. The method of Claim 4, suction vacuum cleaner, characterized in that the flow passage cross-sectional area S of the inlet of the nozzle was set to 150mm ² ~250mm ^2. 6. A suction port for a vacuum cleaner according to claim 4, wherein a gap between a guide portion of said nozzle and an outer periphery of said impeller is gradually reduced. 7. A suction port for a vacuum cleaner according to claim 4, wherein the cross-sectional area of the flow passage of the nozzle is gradually reduced by gradually reducing the lateral width of the nozzle. 8. The method according to claim 4, wherein a gap between a guide portion of the nozzle and an outer periphery of the impeller and a lateral width of the nozzle are gradually reduced, so that a cross-sectional area of the passage of the nozzle is gradually reduced. A special feature for a vacuum cleaner. 9. A vacuum cleaner according to claim 1, wherein said nozzle is formed integrally with a suction case. 10. The suction case according to claim 1, wherein the nozzle is formed integrally with a part of a partition wall of the suction case which partitions between a brush chamber of the suction mouth and an air turbine chamber. A suction port for a vacuum cleaner, which can be detached from. 11. A vacuum cleaner according to claim 1, wherein said rotating brush is connected to said rotating shaft by a belt. 12. The vacuum cleaner according to claim 1, wherein the rotary brush is attached to the rotary shaft. 13. An impeller mounted on a rotating shaft, a flow path for supplying a suction airflow to the impeller to generate a rotational torque in the impeller, and a rotatably provided in the brush chamber for the impeller. In the suction opening of the vacuum cleaner provided with a rotating brush driven by the generated rotating torque, the flow path includes a plurality of blades of the impeller on an outer periphery of the impeller.
A plurality of guide plates provided to the plurality of wing spaces across
With air intake formed in the suction case
Clean sky that has entered the space behind the plurality of guide plates
Air is given directionality by the plurality of guide plates, and the impeller
Configured to blow from the outer periphery into a plurality of vanes space, air flow within the impeller, suction vacuum cleaner being characterized in that so as to flow out to the rotating brush chamber. 14. An impeller mounted on a rotating shaft, a flow path for supplying a suction airflow to the impeller to generate a rotational torque in the impeller, and a rotatably provided in a brush chamber for the impeller. And a rotary brush driven by the generated rotating torque, wherein the flow path is directed to the plurality of wing spaces over the plurality of wing spaces of the impeller on the outer periphery of the impeller. A plurality of guide plates provided, and a plurality of air intakes formed in a suction case facing the outside of the guide plates, and taken in from the plurality of air intakes and behind the plurality of guide plates. Clean air entering the space is given a direction by the plurality of guide plates and blown from the outer periphery of the impeller into the plurality of blade spaces, and the airflow in the impeller flows out to the rotating brush chamber. The feature is to make it And the suction for the vacuum cleaner. 15. The suction port for a vacuum cleaner according to claim 13 , wherein the guide plate is inclined relative to the blades of the impeller. 16. A suction opening for an electric vacuum cleaner according to claim 13 , wherein said guide plate is provided at a pitch which does not coincide with the blades of said impeller at a plurality of locations at the same time. 17. A suction port for a vacuum cleaner according to claim 13, wherein said air intake is extended to a position rearward of the brush chamber and opened. 18. A suction port for a vacuum cleaner according to claim 17, wherein a filter is provided at an opening of said air intake port. 19. The impeller according to claim 13, wherein the impeller is smoothly curved such that the depth of the base of the blade is deeper at the center in the axial direction, and air from the blade is blown. The outside area in the axial direction is inclined with respect to the guide plate, and the inside area through which air in the wing space flows out is formed parallel to the rotation axis. 20. The suction port for a vacuum cleaner according to claim 19, wherein an auxiliary wing extending in a circumferential direction is formed on an outer peripheral edge of an inner region of the wing. 21. The vacuum cleaner according to claim 13, wherein the impeller and the flow path are provided at both ends of a rotating shaft that supports a rotating brush. 22. The suction device for a vacuum cleaner according to claim 21, wherein the bearing unit supporting both ends of the rotating shaft is separably held by a suction case divided into two vertically. 23. An electric vacuum cleaner comprising the suction port according to claim 1.