JPH119526A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner which easily leaks and notifies the abnormal state by a simple constitution at the time of an abnormal ascent of a negative pressure on the negative pressure side of an electric blower due to a stuck refuge, etc. SOLUTION: A leak mechanism chamber where a leak mechanism 41 is arranged, is defined and formed on the top of an electric blower chamber where an electric blower is housed. An approx. cylindrical body 43 wherein one end communicates with the negative pressure side of the electric blower by a communicating passage, and on the other end, a flow-in port 55 is provided, is formed of a light-permeable member. On the inner peripheral surface of the cylindrical body 43, a regulating wall part 47 of a wall-form, on which a circulating port 46 is made, is provided, and on the flow-in port 55 side, a passing chamber 48 is defined and formed, and on the communicating passage 44 side, a valve disc chamber 49 is defined and formed. In the valve disc chamber 49, a leak valve disc 51 which is movable, is urged to the regulating wall part 47 by a coil spring 53, and closes a circulating port 46, is housed. In the passing chamber 48, a whistle body is formed by providing a claw part 57 sticking out to a rectifying wall part 56 which protrudes into a wall-form from the edge of the flow-in port 55, and tilting to the flow-in port 55 side, and the leak mechanism 41 is constituted. When the negative pressure increases to a specified value or higher, the outside air flows in from the flow-in port 55, and the whistle body 58 sounds.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner provided with a leak valve for leaking due to an increase in the negative pressure side of an electric blower.

[0002]

2. Description of the Related Art Conventionally, as this type of vacuum cleaner, for example, a vacuum cleaner main body that divides a dust collecting chamber on the vacuum side of an electric blower is communicated with the vacuum side of the electric blower to be electrically driven by dust or the like. When the negative pressure on the negative pressure side of the blower is increased to a predetermined value or more, the leak valve body that can be viewed from the outside moves against the bias of a coil spring or the like, and takes in outside air into the negative pressure side of the electric blower to reduce the electric blower. There is known a configuration that includes a leak mechanism that assists cooling and indicates that dust is clogged.

[0003]

When a hose is connected to the main body of the vacuum cleaner for cleaning, the main body of the vacuum cleaner is usually located behind the cleaner, and the cleaner looks at the part to be cleaned. The cleaning operator does not see the leak valve. For this reason, in the above-mentioned conventional vacuum cleaner, it is difficult to notify a user of a clogged state.

Therefore, a configuration is known in which, for example, a negative pressure on the negative pressure side of an electric blower is detected by a pressure sensor or the like, and when a predetermined negative pressure is reached, a sounding means such as a buzzer is provided. However, a separate pressure sensor, a buzzer, a driving circuit for the buzzer, and the like are required, and there is a problem that the structure is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vacuum cleaner which can easily notify a dust clogging state with a simple configuration.

[0006]

According to a first aspect of the present invention, there is provided a vacuum cleaner provided with a case body, an electric blower housed in the case body, and communicating with a negative pressure side of the electric blower in the case body. A dust collecting chamber, a leak port provided in the case body and communicating with a negative pressure side of the electric blower through a leak air path, and a negative pressure on the negative pressure side of the electric blower movably provided in the leak air path. A leak valve body that opens the leak port to take in outside air to the negative pressure side of the electric blower due to an increase in the pressure, and a whistle body that is provided in the leak air passage and emits sound from the outside air from the leak port.

When the negative pressure on the negative pressure side of the electric blower is increased, the leak valve is moved to open the leak port, and when the outside air flows through the negative pressure side of the electric blower, the whistle is sounded by the external air. Even if the movement of the leak valve is not visually observed, the sound generated by the whistle having a simple structure makes it easy to recognize the clogged state.

[0008] According to a second aspect of the present invention, in the vacuum cleaner of the first aspect, the leak air path is formed of a translucent member at least in a range in which the leak valve moves. The leak valve element is configured such that at least an outer surface facing the light-transmitting member has a color that can be distinguished from the surroundings.

[0009] At least a part of the leak air passage in the range in which the leak valve moves is formed of a translucent member facing the outside of the case body, and an outer surface of the leak valve opposing the light transmissive member. Since the color is easily distinguishable from the surroundings, the situation of the increase in the negative pressure on the negative pressure side of the electric blower recognized by the sound of the whistle body can be easily visually observed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a vacuum cleaner according to the present invention will be described with reference to the drawings.

3 and 4, reference numeral 1 denotes a vacuum cleaner main body. The vacuum cleaner main body 1 includes a lower case 2a having an open upper surface, and an upper case 2b for closing a rear upper surface of the lower case 2a. Has a main body case 2 as a case body having a front upper surface portion opened by being sandwiched and joined to a peripheral edge including a front surface, and a lid for closing the opening of the front upper surface portion to be openable and closable in the main body case 2. The body 4 is rotatably supported by a shaft.

The main body case 2 is provided with a rotatable revolving wheel 5 on the front lower surface in the traveling direction, and large-diameter driven wheels 6 and 6 are rotatably provided on the rear side surface of the main body case 2. The cleaner body 1 can run on a floor surface (not shown) with the turning wheel 5 and the driven wheels 6 and 6. In addition, a handle 7 rotatable up and down is provided on the upper part of the main body case 2.
Is provided.

On the other hand, in the vacuum cleaner main body 1, a dust collecting chamber 13 whose upper part is opened by a partition wall 12 having a grid-like communication hole 11 is formed in a partition on the front side in the traveling direction of the vacuum cleaner main body 1. And an electric blower behind this dust collection chamber 13.
An electric blower room 15 accommodating 14 is sectioned and formed. In the dust collecting chamber 13, a dust collecting bag 18 is detachably mounted by a holder 17 pivotally mounted in the dust collecting chamber 13.

On the front surface of the partition 12, a first auxiliary dust filter 21 for covering the communication hole 11 is detachably mounted. The first auxiliary dust collecting filter 21 has a frame 22 and an auxiliary filter 23 inserted into the frame 22.

The dust bag 18 and the first auxiliary dust filter 21 are attached and detached through the upper opening of the dust chamber 13.
The lid 4 has a rear end portion pivotally attached to the upper case 2b, and is formed so as to cover the dust collection chamber 13 from the upper side so as to be freely opened and closed.

On the other hand, an electric blower
14 are arranged. The electric blower 14 includes an electric unit 25 that rotationally drives a fan (not shown) and a fan cover 26 that covers the fan. An intake port 27 is formed in the center of the front surface of the fan cover 26, and an exhaust hole (not shown) is formed in the frame of the electric unit 25. In addition, a motor head in which a bearing for supporting a shaft (not shown) for rotating the fan is provided substantially in the center of the rear end surface of the electric unit 25.
28 is formed to project rearward in a columnar shape.

An annular rubber support 31 is fitted to the front end of the electric blower 14 at the outer peripheral edge of the front end, and a rubber buffer 32 is attached to the motor head 28 at the rear end. 28
It is attached to cover.

On the other hand, on the lower surface of the upper case 2b, an upper rib front portion 34 protruding downward and positioning and fixing the fan cover 26 via a rubber support 31, and a rearward portion of the upper rib front portion 34 The upper rib rear portions 35 which are positioned so as to protrude downward substantially in parallel and have lower ends sandwiching and fixing the motor head 28 of the electric unit 25 via the buffer 32 are formed to protrude, respectively.

Further, on the upper surface of the lower case 2a, the lower case 2 protrudes upward in opposition to the upper rib front section 34 and the upper rib rear section 35, and fixes the fan cover 26 at the upper end. 36 and a lower rib rear portion 37 whose upper end portion clamps and fixes the motor head 28 of the electric unit 25 are formed so as to protrude, and the electric blower 14 is fixed. On the front end side of the electric blower 14, an intake port 27 of the electric blower 14 is airtightly connected to the dust collecting chamber 13 through the communication hole 11 by a rubber support 31.

A leak mechanism chamber 40 is defined above the electric blower chamber 14. In the leak mechanism chamber 40, a leak mechanism 41 is provided. As shown in FIG. 1 or FIG. 2, the leak mechanism 41 has a cylindrical body 43 which is closed at one end in the axial direction by an end plate 42 and is formed in a substantially cylindrical shape by a translucent member. The cylindrical body 43 is provided integrally with the end on the opening side and the end is an electric blower.
A tubular communication passage 44 communicating between the partition wall 12 and the upper rib front portion 34 and the lower rib front portion 36 that support the electric blower 14, that is, the electric blower 14, is integrally provided. Further, inside the cylindrical body 43, a regulating wall portion 47 which protrudes inward toward the inner peripheral surface in a wall shape and opens a substantially circular flow hole 46 in the center is provided, and a flow chamber 48 is provided on the end plate 42 side. Are formed, and a valve body chamber 49 is formed on the communication passage 44 side.

In the valve body chamber 49 of the cylindrical body 43, a substantially cylindrical leak valve body 51 is slidably provided along the axial direction of the cylindrical body 43. One end edge of the leak valve element 51 in the axial direction protrudes into a large diameter substantially the same size as the inner diameter of the valve element chamber 49, and has a distal end which is substantially airtight and substantially abuts so as to be movable on the inner peripheral surface of the valve element chamber 49. The flange 52 is provided in a protruding manner. In the valve chamber 49,
A coil spring 53 is provided as urging means for urging the leak valve body 51 so that the end face of the leak valve body 51 on which the flange 52 is not provided abuts on the regulating wall 47 to close the flow hole 46. Have been.

The end plate 42 of the cylindrical body 43 has an inflow hole 55 serving as a leak port which communicates with the flow passage chamber 48 and opens in a substantially arc shape.
Are formed. The end plate 42 of the inflow hole 55
A rectifying wall portion 56 that protrudes in a wall shape inside the flow chamber 48 is provided at an edge of the flow passage chamber 48, and an inner peripheral surface of the flow chamber 48 of the cylindrical body 43 is provided on the inflow hole 55 side toward the rectifying wall portion 56. An inclined claw 57 is provided, and a rectifying wall is provided.
A whistle body 58 is constituted by 56 and the claw portion 57. The flow passage chamber 48, the communication hole 46, the valve body chamber 49, and the communication passage 44 from the inflow hole 55 form a leak air passage 59.

In the leak mechanism 41, a part of the outer peripheral surface of the cylindrical body 43 and the inflow hole 55 are exposed to the outside through the window 60 opened on the upper surface of the main body case 2, and the communication passage 44 is connected to the electric blower 14. It is arranged so as to communicate with the negative pressure side. Note that the leak valve element 51 has a color that can be easily distinguished from the surroundings, such as red or yellow, a high appeal color such as red, yellow, white, gold, or silver, or a color of the main body case 2 that is red, for example. In this case, an opposite color such as green is applied by coating or the like so that it can be easily identified.

On the other hand, an exhaust chamber 61 is formed in the vacuum cleaner main body 1 behind the electric blower chamber 15, and an exhaust chamber 61 is formed in the rear upper portion of the upper case 2b of the vacuum cleaner main body 1. Room
An exhaust hole 61a communicating with an exhaust hole (not shown) of the electric blower 14 via the opening 61 is formed on the rear side of the upper case 2b. In the exhaust chamber 61, a second auxiliary dust filter 62 similar to the first auxiliary dust filter 21 has an exhaust hole 61a.
The cover is detachably disposed over the cover.

A suction portion 65 for detachably connecting a hose (not shown) is provided substantially at the center of the front side of the main body case 2. The suction portion 65 has an inner opening 66 and an outer opening 67 opposed to each other. Is formed. In addition, a cylindrical suction port 68 is formed in the middle opposite to the inner opening 66 and the outer opening 67. The suction port 68 has a front part of the main body 1 of the vacuum cleaner.
And a rear portion thereof opens to the dust collection chamber 13. Further, a shutter 69 that slidably supports the suction port 68 so that the suction port 68 can be opened and closed is slidably supported by the suction section 65.

Next, the operation of the above embodiment will be described.

During normal cleaning, the lid 4 is closed,
Power is supplied through a power cord (not shown)
Slide 69 to open suction port 68. With the shutter 69 opened, a hose (not shown), an extension pipe, and a suction port main body are appropriately connected, the end of the hose is gripped, and the electric blower 14 is appropriately driven to perform cleaning. That is, by driving the electric blower 14, the negative pressure on the negative pressure side of the electric blower 14 is increased, dust is sucked together with air from the suction port 68 through the hose, and guided to the dust collection chamber 13 of the vacuum cleaner main body 1. As a result, it is captured in the dust bag 18.

Then, air containing fine dust not captured by the dust collecting bag 18 flows through the first auxiliary dust collecting filter 21 to capture the dust, and flows through the communication hole 11 into the air inlet 27 of the electric blower 14. Sucked into. Furthermore, the air inlet 27 of the electric blower 14
The air sucked into the air blower passes through the inside of the electric blower 14 and is exhausted to the exhaust chamber 61 from an exhaust hole (not shown) of the electric blower 14.
Further, the air that has flowed into the exhaust chamber 61 passes through the second auxiliary dust collection filter 62 to remove almost all dust, and the exhaust holes 61 a
Is discharged to the outside air outside the vacuum cleaner main body 1 as exhaust air.

Further, for example, when dust is caught in the hose or the amount of dust caught in the dust collecting bag 18 is increased and the air permeability is reduced, the negative pressure on the negative pressure side of the electric blower 14 becomes higher than a predetermined value. Increase. When the negative pressure increases beyond the predetermined value, the negative pressure in the valve body chamber 49 of the leak mechanism 41 communicating with the negative pressure side of the electric blower 14 via the communication path 44 also increases. The inside of the flow chamber 48 of the leak mechanism 41 that communicates with the outside air via the inflow hole 55 is at an outside pressure. Therefore, the valve chamber 49 and the flow chamber
The pressure difference from the pressure valve 48 increases, and the leak valve element 51 moves toward the communication passage 44 against the bias of the coil spring 53, and the flow hole 46
Is opened, a leak air passage 59 is opened, and outside air flows into the negative pressure side of the electric blower 14 from the inflow hole 55 through the flow chamber 48 and the valve body chamber 49 and the communication passage 44 to leak.

The leakage causes the outside air flowing into the flow passage chamber 48 from the inflow hole 55 to sound as a wind noise when flowing through the whistle body 58, thereby causing an abnormal state such as an increase in dust clogging or an increase in dust collection. Notify. For this reason, even when cleaning is performed in a state where the vacuum cleaner main body 1 is located behind the cleaner, an abnormal state can be recognized without looking at the leak mechanism 41 provided in the vacuum cleaner main body 1.

Further, the amount of movement of the leak valve element 51 increases in accordance with the magnitude of the negative pressure on the negative pressure side of the electric blower 14 against the urging force of the coil spring 53. In addition, since the leak valve body 51 that is easily colored is easily visible through the cylindrical body 43 formed of a light transmitting member, the negative pressure state can be confirmed by the movement amount of the leak valve body 51.

Then, the electric blower
The amount of air flowing through 14 is ensured, and electric blower 14 is cooled to prevent damage due to heating.

As described above, according to the above embodiment, since the whistle 58 is provided in the cylinder 43 of the leak mechanism 41 that accommodates the leak valve 51 and forms the leak air passage 59, the electric blower 14
When the negative pressure on the negative pressure side increases, the leak valve body 51 moves to open the leak air passage 59 and the whistle body 58 sounds when the outside air flows to the negative pressure side of the electric blower 14, so that the leak valve is body
Even if the movement of 51 is not visually confirmed, the abnormal increase of the negative pressure on the negative side of the electric blower 14 such as dust clogging can be easily recognized by the sound generated by the whistle body 58 having a simple structure.

Further, since the whistle body 58 is provided at the inlet hole 55 of the cylindrical body 43 into which the outside air flows, no separate buzzer or other notification means is required, and the cleaning operator can easily recognize the sound with a simple structure. A leak mechanism 41 which can be manufactured easily, is inexpensive, and has a small and small abnormality notification function is obtained.

Further, the outer peripheral surface of the leak valve body 51 housed in the cylindrical body 43 formed of a light transmitting member is given a color that can be easily distinguished from the surroundings. Thus, an abnormal state can be easily recognized.

In the above embodiment, not only the canister type but also an upright type can be used.

The whistle body 58 has been described as being positioned at the inflow hole 55 of the cylindrical body 43. However, any one of the leak air passages 59 from the inflow hole 55 into which the outside air flows to the negative pressure side of the electric blower 14 communicated therewith. It can also be arranged at the position.

If the movement of the leak valve body 51 can be recognized, such as by exposing the barrel 43 of the leak mechanism 41 from the main body case 2 and forming only the movement range of the leak valve body 51 with a translucent member, The entirety of 43 may not be formed of a translucent member.

Furthermore, the outer peripheral surface of the leak valve element 51 has been described with a color that can be easily distinguished from the surroundings. However, only a part of the cylindrical body 43 corresponding to the position facing the outside of the main body case 2 may be colored. It may be formed of a member having a color that can be easily distinguished from the surroundings.

Although the communication path 44 of the leak mechanism 41 is described as communicating between the upper rib front part 34 and the lower rib front part 36 and the partition wall 12, for example, the electric blower is connected to the dust collecting chamber 13. The same effect can be obtained as long as it is configured to communicate with the 14 negative pressure side.

The urging means for urging the leak valve element 51 is not limited to the coil spring 53, but may be hydraulic, pneumatic,
Any structure such as a leaf spring or an elastic member may be used.

[0042]

According to the first aspect of the present invention, the leak valve body is moved by increasing the negative pressure on the negative pressure side of the electric blower to open the leak port and allow outside air to flow to the negative pressure side of the electric blower. In this case, a whistle that sounds due to the flow of outside air is provided. Can easily be recognized.

According to the vacuum cleaner of the second aspect, in addition to the effect of the vacuum cleaner of the first aspect, at least a part of the leak air path within the range in which the leak valve moves is exposed to the outside of the case body. At least, the outer surface of the leak valve body facing the light-transmitting member has a color that can be easily distinguished from the surroundings. The situation of the increase in the negative pressure can be easily visually recognized.

[Brief description of the drawings]

FIG. 1 is a partially cut-away sectional view showing a leak mechanism according to an embodiment of a vacuum cleaner of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a sectional view showing the main body of the electric vacuum cleaner.

FIG. 4 is a perspective view of the same.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Body case as case body 14 Electric blower 51 Leak valve body 55 Inlet as leak port 58 Whistle body 59 Leak air path

Claims (2)

[Claims] A case body; an electric blower housed in the case body; a dust collection chamber provided in the case body in communication with a negative pressure side of the electric blower; A leak port communicating with a negative pressure side of the blower via a leak air path; and a leak port movably provided in the leak air path, opening the leak port by increasing a negative pressure on the negative pressure side of the electric blower, and opening the outside air to the electric blower. An electric vacuum cleaner comprising: a leak valve body to be taken in on the negative pressure side; and a whistle body provided in the leak air passage and sounding by outside air from the leak port. 2. The leak air path is constituted by a light-transmitting member at least in a range in which the leak valve moves, which faces the outside of the case body, and the leak valve faces at least the light-transmitting member. The vacuum cleaner according to claim 1, wherein the outer surface has a color distinguishable from the surroundings.