JP6951289B2 - Vacuum cleaner - Google Patents

Description

The present invention relates to a vacuum cleaner.

In the conventional vacuum cleaner, when the dust collecting case is clogged, air (cooling air) is taken in from the outside to cool the electric blower (see, for example, Patent Documents 1 and 3).

Japanese Unexamined Patent Publication No. 2012-65944

However, in the vacuum cleaner described in Patent Document 1, since the intake of the cooling air is provided on the vacuum cleaner main body side, the boundary wall is located in front of (front) the intake, and the vacuum cleaner is made compact. There was a problem that it became difficult.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an electric vacuum cleaner capable of making the vacuum cleaner main body compact without reducing the capacity of the dust collecting case.

The present invention includes an electric blower that generates suction force, a vacuum cleaner main body that accommodates the electric blower, a dust collection case that is detachably provided in the accommodating portion of the vacuum cleaner main body and is provided with a dust collection filter, and the above. A lid that is rotatably attached to the vacuum cleaner body so as to open and close the upper opening of the accommodating portion, a communication portion that is provided in the dust collecting case and communicates with the outside of the vacuum cleaner body, and the lid. It is provided with a valve body that is provided and communicates with the outside of the vacuum cleaner body by applying a negative pressure to the communication portion, and the communication portion is between the dust collection filter and the discharge port of the dust collection case. It is characterized in that the opening of the communication portion is formed upward.

According to the present invention, it is possible to provide an electric vacuum cleaner capable of making the vacuum cleaner main body compact without reducing the amount of dust collected in the dust collecting case.

It is a perspective view which shows the state which opened the cover body of the vacuum cleaner of this embodiment. It is an external perspective view which shows the electric vacuum cleaner of this embodiment. It is a top view which shows the inside of the vacuum cleaner of this embodiment. It is a top view of the electric vacuum cleaner of this embodiment. FIG. 4 is a sectional view taken along line VV of FIG. It is a perspective view which shows the state which removed the dust collection case from the state of FIG. It is an external perspective view which shows the dust collection case of the electric vacuum cleaner of this embodiment. It is a perspective view which shows the internal structure of a dust collecting case, and shows the state at the time of dumping garbage. It is a perspective view which shows the internal structure of a dust collecting case, and shows the state at the time of cleaning of a dust collecting part. It is a rear view of the dust collection case. It is a top view of the dust collection case. FIG. 11 is a cross-sectional view taken along the line XII-XII of FIG. FIG. 11 is a cross-sectional view taken along the line XIII-XIII of FIG. It is sectional drawing which shows the state which removed the dust collection case from the vacuum cleaner of this embodiment. FIG. 4 is a cross-sectional view taken along the line XV-XV of FIG. It is sectional drawing which shows the flow of the cooling air from a cooling air intake part. It is explanatory drawing of the operation effect of the electric vacuum cleaner, (a) is this embodiment, (b) is a comparative example.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In the following description, the front-back, up-down, left-right directions shown in FIG. 1 will be used as a reference.

FIG. 1 is a perspective view showing a state in which the lid of the vacuum cleaner of the present embodiment is opened.
As shown in FIG. 1, the vacuum cleaner 100 includes a vacuum cleaner main body 1, a dust collecting case 2 detachably attached to the vacuum cleaner main body 1, and a lid 3 rotatably attached to the vacuum cleaner main body 1. And is configured with.

The vacuum cleaner main body 1 is made of synthetic resin that constitutes the outer shell of the vacuum cleaner 100, and is configured by combining a lower case 11 that constitutes the lower portion of the outer shell and an upper case 12 that constitutes the upper portion of the outer shell. ing. Further, the lower case 11 is formed with an accommodating portion 11a for accommodating the dust collecting case 2. The accommodating portion 11a includes a side wall portion 11b provided on the left and right side surfaces from the front end surface of the lower case 11, a bottom wall portion 11c (see FIG. 5) of the lower case 11, and a boundary wall 11d for partitioning the vacuum cleaner main body 1 back and forth. It is surrounded by and and is configured in a concave shape. A hose connection port 11e to which a hose (not shown) is connected is provided on the front surface of the side wall portion 11b.

Further, a pedestal portion 12a projecting upward is formed on the upper surface of the upper case 12. A power switch 12b and a take-up button 12c are provided side by side on the upper surface of the pedestal portion 12a. The power switch 12b is a seesaw type and can switch ON / OFF of the power supply of the vacuum cleaner 100. The take-up button 12c is a pressing type, and the cord can be taken up by pressing.

The dust collecting case 2 is different from the paper pack type, and has a rigidity formed into a substantially square box shape by a synthetic resin material. Further, the dust collecting case 2 is configured to be attached to and detached from above the vacuum cleaner main body 1 with respect to the accommodating portion 11a.

The lid 3 is made of a synthetic resin material and is rotatably attached to the vacuum cleaner main body 1 so as to open and close the upper opening of the accommodating portion 11a. The rotating shafts that rotatably support the pedestal portion 12a are provided on the left and right side surfaces of the pedestal portion 12a. Further, inside the lid body 3, an indicator (valve body) 4 for detecting the dust collection amount (dust collection state) of the dust collection case 2 is provided.

The indicator 4 has a function as a valve body and a function of notifying the dust collection amount (dust collection state) of the dust collection case 2. Further, the indicator 4 is provided in the air passage (flow path) 3t formed of the plate material 3s having a concave cross section. An outlet 3u is formed on the downstream side of the air passage 3t.

FIG. 2 is an external perspective view showing the vacuum cleaner of the present embodiment. Note that FIG. 2 shows a state in which the lid 3 is closed.
As shown in FIG. 2, the lid 3 is formed with a confirmation window 3a for a dust disposal sign on the rear side and in the center in the left-right direction. The confirmation window 3a has an oval shape that is elongated to the left and right. Further, an oval-shaped recessed portion 3a1 is formed around the confirmation window 3a. As a result, the confirmation window 3a can be confirmed not only from directly above but also from diagonally above, and the visibility of the confirmation window 3a can be improved.

Further, the lid body 3 is formed with an intake port 3b for taking in cooling air (air outside the vacuum cleaner main body 1) on the side of the confirmation window 3a. The intake port 3b is configured with a plurality of slit-shaped holes 3b1 arranged in the front-rear direction. By reducing the opening of the intake port 3b in this way, it is possible to prevent large foreign matter from entering through the intake port 3b.

FIG. 3 is a plan view showing the inside of the vacuum cleaner of the present embodiment. Note that FIG. 3 shows a state in which the lid 3 and the upper case 12 are removed from the vacuum cleaner main body 1.
As shown in FIG. 3, in the vacuum cleaner main body 1, the electric blower 5 and the cord reel 6 are housed side by side in the space behind the boundary wall 11d.

The electric blower 5 is arranged on the right side and is vibration-proof supported by the lower case 11. Further, the electric blower 5 is arranged sideways so that the rotation axis faces the front-rear direction. Although not shown, the electric blower 5 has an impeller arranged on the front side and a drive unit having a rotor and a stator on the rear side.

The cord reel 6 is arranged to the left and can rotate about an axis in the left-right direction so that the cord 6a can be pulled out toward the rear.

FIG. 4 is a plan view of the vacuum cleaner of the present embodiment.
As shown in FIG. 4, large-diameter wheels 13 and 13 are provided on both left and right rear side surfaces of the vacuum cleaner main body 1. Further, the vacuum cleaner main body 1 is provided with a handle 14 that is used by hand when carrying the vacuum cleaner body 1. The handle 14 is curved and extends from the left end to the right end with a predetermined width, and is rotatably attached to the vacuum cleaner main body 1 (upper case 12). Note that FIG. 4 shows a state in which the handle 14 is in contact with the upper case 12.

Further, the handle 14 is configured so as not to overlap the confirmation window 3a, the intake port 3b, the power switch 12b, and the take-up button 12c when viewed from above in the vertical direction when not in use. .. As a result, the visibility of the confirmation window 3a, the intake of air from the intake port 3b, and the operability of the power switch 12b and the take-up button 12c are not impaired.

Further, an exhaust port 12d is provided behind the vacuum cleaner main body 1. The air that has passed through the electric blower 5 (see FIG. 3) is discharged to the outside of the vacuum cleaner main body 1 from the exhaust port 12d after cooling the cord reel 6 and the control board (not shown).

Further, the vacuum cleaner main body 1 is formed with a cord outlet 12e for pulling out the cord 6a (see FIG. 3) on the side of the exhaust port 12d. Further, a support protrusion 12f is formed on the vacuum cleaner main body 1 (upper case 12). As a result, when the vacuum cleaner 100 is erected, the hose connection port 11e (see FIG. 1) is facing upward by supporting the vacuum cleaner 100 at three points of the support protrusion 12f and the wheels 13 and 13. It can be supported by.

FIG. 5 is a sectional view taken along line VV of FIG. In FIG. 5, the electric blower 5 is not shown.
As shown in FIG. 5, a plate material 3s is formed on the back surface of the lid 3 so as to form a mounting space for mounting the indicator 4. The plate material 3s is formed in a concave shape in cross section, and the indicator 4 is fixed inside.

The indicator 4 is a known technique, and has a transparent square cylindrical cylinder 4a, a piston housed in the cylinder 4a (not shown), and a coil spring (not shown) that urges the piston in one axial direction. (Illustrated) and. Further, the cylinder 4a is formed with holes at both ends in the axial direction. Further, the cylinder 4a is arranged along the left-right direction. Further, the confirmation window 3a is located directly above the indicator 4.

FIG. 6 is a perspective view showing a state in which the dust collecting case is removed from the state of FIG.
As shown in FIG. 6, in the vacuum cleaner main body 1, a frame body 11f having a substantially square opening is formed on the boundary wall 11d. The frame body 11f is configured to have an edge portion 11f1 on the upper side, an edge portion 11f2 on the lower side, an edge portion 11f3 on the right side, and an edge portion 11f4 on the left side. The left and right edge portions 11f3 and 11f4 are inclined so as to be located on the front side toward the bottom side (lower side) of the accommodating portion 11a. Further, the edge portion 11f2 is located on the front side of the edge portion 11f1. Further, a filter 15 is provided in the opening of the frame body 11f so as to cover the entire opening. Although not shown, a grid-like frame is provided on the back side of the filter 15.

Further, on the left and right sides of the frame body 11f, protruding walls 11g and 11g protruding forward are formed. The protruding wall 11g is formed from the upper end of the edge portion 11f1 to the lower end of the edge portion 11f2.

FIG. 7 is an external perspective view showing a dust collecting case attached to the vacuum cleaner of the present embodiment.
As shown in FIG. 7, the dust collecting case 2 has a substantially square box shape, and includes a case main body 20 located on the front side and a lid portion 21 located on the back side.

The case body 20 is formed with a circular suction port 20a penetrating in the front-rear direction in the center of the front surface. Further, the case body 20 is formed with bulges forward on both the left and right sides of the suction port 20a. Further, on the front surface of the case body 20, a filter brush 20b used for cleaning the filter is detachably attached above the suction port 20a.

Further, a handle portion (handle) 20c used for attaching / detaching the dust collecting case 2 is formed on the upper portion of the case main body 20. The handle portion 20c is provided so as to extend in the left-right direction with a predetermined width, and is configured to form a gap on the front side into which a hand can be inserted.

A cooling air intake portion (communication portion) 21a is provided on the upper portion of the lid portion 21. The cooling air intake unit 21a is a flow path into which the air (cooling air) taken in from the intake port 3b (see FIG. 1) is taken in. Further, the cooling air intake portion 21a is integrally molded with the lid portion 21 by the resin. Further, the cooling air intake portion 21a has a rectangular opening 21b formed upward. A rubber packing 21c is provided on the entire edge of the opening 21b.

FIG. 8 is a perspective view showing the internal structure of the dust collecting case and showing the state at the time of dumping the dust.
As shown in FIG. 8, the dust collecting case 2 is provided with a mesh filter 22 between the case main body 20 and the lid portion 21.

A substantially rectangular opening 20g is formed on the back surface of the case body 20, and a dust collecting space Q2 is formed inside. Further, a lock mechanism for locking the lid portion 21 to the case main body 20 is provided on the upper portion of the case main body 20. This lock mechanism includes a lock release button 20h that is operated when the lid portion 21 is unlocked, and lock claws 20i and 20i that lock the lid portion 21 and the case body 20. Further, a positioning protrusion 20j is formed integrally with the case body 20 between the lock claw 20i and the lock claw 20i. The lock release button 20h is provided on the left side surface of the handle portion 20c, and when pressed to the right, the lock claws 20i are interlocked to operate in the same direction.

The lid portion 21 is formed with engaging holes 21d and 21d that engage with the lock claws 20i and 20i described above. Further, the lid portion 21 is formed with a positioning hole 21e into which the positioning protrusion 20j is inserted.

The case body 20 and the lid 21 are provided at the lower part and are rotatably connected via hinges H1 and H1, and the case body 20 can be opened and closed by the lid 21.

The mesh filter 22 has a function of collecting dust sucked from the suction port 20a (see FIG. 7), and includes a nylon (or metal) mesh filter member 22a (only a part of which is shown). ing. Further, the mesh filter 22 has a substantially square frame body 22b. The frame body 22b has side wall portions 22b1, 22b2, 22b3, 22b4 in which the periphery of the filter member 22a extends substantially orthogonally to the lid portion 21 side. As a result, when the case body 20 is closed by the lid portion 21, the mesh filter 22 is inserted into the dust collecting space Q2 of the case body 20.

Further, the frame body 22b has a frame 22c formed in a grid pattern. A filter member 22a is provided by insert molding in the region surrounded by the frame 22c. Further, in the mesh filter 22, a circular protruding portion 22d integrally formed with the frame body 22b and the resin is formed on the surface on which the filter member 22a is formed. The protruding portion 22d is formed so as to protrude from the filter member 22a. Further, when the case body 20 is closed by the lid portion 21, the protruding portion 22d is arranged at a position facing the suction port 20a.

The mesh filter 22 is rotatably connected to the lid portion 21 via hinges H2 and H2. The hinge H2 has a bearing that pivotally supports the frame body 22b, and the bearing is screwed to the back surface of the lid portion 21.

When the dust is thrown away, the lock release button 20h is pressed to release the lock between the case body 20 and the lid portion 21, and the dust collection case 2 can be brought into the state shown in FIG. By opening the lid portion 21, dust in the case body 20 can be discarded. Further, by removing the filter brush 20b from the case body 20 and using it, dust adhering to the surface of the filter member 22a of the mesh filter 22 can be removed.

FIG. 9 is a perspective view showing the internal structure of the dust collecting case and showing the state of the dust collecting portion at the time of cleaning.
As shown in FIG. 9, the dust collecting case 2 is provided with a dust collecting filter 23 between the lid portion 21 and the mesh filter 22.

The dust collecting filter 23 has a filter member 23a folded in a pleated shape (folded shape) in order to expand the ventilation area. The fold line direction of the folds of the filter member 23a is preferably the vertical direction (gravitational action direction). This is because when the cooling air hits, the folding direction is provided in the substantially vertical direction, so that the fine dust adhering to the filter member 23a falls downward and can be easily removed. The filter member 23a is made of a non-woven fabric, a HEPA filter, or the like.

Further, the dust collecting filter 23 is configured to be covered by the mesh filter 22 when the lid portion 21 is closed (see FIG. 8). Therefore, after the relatively large dust is removed by the filter member 22a, the fine dust that could not be removed by the filter member 22a is removed by the filter member 23a.

When cleaning the dust collection filter 23, the mesh filter 22 is rotated to expose the dust collection filter 23. Then, the dust collecting filter 23 can be cleaned by using the filter brush 20b or by cleaning.

FIG. 10 is a rear view of the dust collecting case. Note that FIG. 10 shows a state in which the opening 20 g (see FIG. 8) of the case body 20 is closed by the lid 21.
As shown in FIG. 10, a substantially rectangular discharge port 21f is formed in the lid portion 21. The discharge port 21f is formed not on the entire back surface of the lid portion 21 but on the right side. That is, the discharge port 21f is formed so as to be offset to the side facing the electric blower 5 (see FIG. 3).

Further, the cooling air intake portion 21a formed in the lid portion 21 has a duct portion 21a1 extending toward the discharge port 21f. The tip (lower end) of the duct portion 21a1 communicates with the inside of the discharge port 21f.

Further, a rubber packing 21g is provided on the entire edge of the discharge port 21f. The packing 21g is integrally formed (double-molded) with the packing 21c provided in the cooling air intake portion 21a via a rubber connecting member 21h. As a result, the structure is such that air does not leak from the packings 21c and 21g.

Further, on the back surface of the filter member 23a (the side facing the discharge port 21f), a synthetic resin spacing member 21s for keeping the spacing between adjacent (one-folded) folded portions 23a1 constant is attached. There is. The interval holding member 21s has a triangular holding plate 21s1 that is inserted into a triangular gap formed in the adjacent folded portions 23a1. The holding plates 21s1 are provided at three locations, the upper end, the lower end, and the center of the filter member 23a. These holding plates 21s1 are integrally formed by rod-shaped connecting members 21s2 extending along the tip (mountain portion) of the folded portion 23a1. As described above, the filter member 23a is configured so that the distance between the folded portions 23a1 is kept constant by the gap holding member 21s. As a result, the ventilation area can be made constant.

In the locked state in which the lid portion 21 is closed, the lock claw 20i is inserted into the engaging hole 21d and is engaged with the edge portion (left edge portion) of the engaging hole 21d. Further, the positioning protrusion 20j is fitted in the positioning hole 21e. Further, the lock release button 20h is urged in a direction (left direction) for locking the lock claw 20i by a spring member (not shown). By pressing the lock release button 20h to the right in the state where the lid portion 21 is closed, the lock state between the lock claw 20i and the engagement hole 21d is resisted against the urging force of the spring member (not shown). Is released.

FIG. 11 is a plan view of the dust collecting case.
As shown in FIG. 11, the lid portion 21 has a back surface portion 21t protruding from the back surface. A rib 21u to which the packing 21g is attached is formed so as to project from the back surface portion 21t. The rib 21u has a shape that is easy to be attached along the guide of the edge portion 11g described with reference to FIG.

The cooling air intake portion 21a is located at the center of the discharge port 21f (see FIG. 10) in the left-right direction (width direction). Further, the back surface portion 21t and the rib 21u are cut out and formed at positions overlapping the opening 21b of the cooling air intake portion 21a. Therefore, the cooling air intake portion 21a can face (see through) the filter member 23a (see FIG. 10) from diagonally rearward with respect to the opening 21b (see FIG. 13).

FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG.
As shown in FIG. 12, when the case body 20 is closed by the lid portion 21, the mesh filter 22 is inserted into the case body 20. Further, the dust collecting filter 23 is in a state of being inserted into the frame body 22b of the mesh filter 22.

The rib 21u to which the packing 21g is attached is formed so that the upper end side portion 21u1 projects rearward from the lower end side portion 21u2. As a result, the packing 21g is arranged in an inclined state so that the upper side is located on the rear side and the lower side is located on the front side. In other words, the packing 21g is inclined so that the lower side is closer to the dust collecting filter 23 than the upper side.

When the case body 20 is closed by the lid portion 21, the protruding portion 22d of the mesh filter 22 faces the suction port 20a of the case body 20. Further, a concave surface 22d1 is formed on the front surface of the protruding portion 22d. The concave surface 22d1 is formed so as to face forward. Further, the inner diameter (diameter) of the suction port 20a is formed so as to be substantially the same as the diameter of the concave surface 22d1. As a result, the air sucked from the suction port 20a hits the concave surface 22d1 of the protruding portion 22d and is repelled along the concave surface 22d1 as shown by the arrow. Then, when the air rebounds, a swirling flow is generated, and the dust and the air are separated.

The shape of the protruding portion 22d is not limited to the circular concave surface 22d1 as long as it can generate a swirling flow. For example, the shape may be such that the center of the left and right protrudes forward and a curved concave surface is formed from the center toward each of the left and right.

Further, in the present embodiment, by providing the protruding portion 22d at a position facing the suction port 20a, it is possible to prevent the air sucked from the suction port 20a from directly hitting the filter member 22a of the mesh filter 22. As a result, it is possible to prevent the filter member 22a (see FIG. 8) of the mesh filter 22 from being damaged (broken).

FIG. 13 is a cross-sectional view taken along the line XIII-XIII of FIG.
As shown in FIG. 13, the cooling air intake portion 21a has a duct portion 21a1 extending downward. The inner wall surface 21a2 located on the rear side of the duct portion 21a1 is inclined toward the filter member 23a. Further, the inner wall surface on the front side facing the inner wall surface 21a2 is formed so as to extend in the vertical direction. Therefore, when the cooling air is taken in from the cooling air intake portion 21a, the cooling air easily hits the filter member 23a.

Further, the duct portion 21a1 has an inner wall surface 21a3 having an inclination angle larger than the inclination angle of the inner wall surface 21a2 on the lower side than the inner wall surface 21a2 (the side opposite to the side that takes in the cooling air). As a result, the cooling air emitted from the duct portion 21a1 is more likely to hit the filter member 23a. Further, the suction force of the electric blower 5 (see FIG. 3) can prevent the cooling air from being immediately drawn into the electric blower 5 side.

FIG. 14 is a cross-sectional view showing a state in which the dust collecting case is removed from the vacuum cleaner of the present embodiment. In addition, FIG. 14 is a cross-sectional view when cut in the center in the left-right direction (width direction). Further, in FIG. 14, the position of the electric blower 5 is indicated by a chain double-dashed line (the same applies to FIGS. 15 and 16).

As shown in FIG. 14, in the vacuum cleaner main body 1, the boundary between the accommodating portion 11a and the accommodating portion in which the electric blower 5 or the like is accommodated is formed by the frame body 11f. The frame body 11f is inclined so that the upper side is located on the rear side of the lower side, similarly to the packing 21 g (see FIG. 13) of the dust collecting case 2. That is, in the frame body 11f, the edge portion 11f3 and the edge portion 11f4 (see FIG. 6) are formed so as to be inclined, and the edge portion 11f1 is located behind the edge portion 11f2. As described above, since the opening side of the accommodating portion 11a is formed wide and the bottom side of the dust collecting case 2 is formed narrowly, it is easy to attach the dust collecting case 2 to the accommodating portion 11a.

Behind the filter 15 provided on the frame body 11f, a ventilation passage 11m is formed to send the air discharged from the discharge port 21f (see FIG. 10) to the electric blower 5. The ventilation passage 11m is a closed space, and is configured so that the entire amount of air discharged from the discharge port 21f can be sucked.

By the way, when the vacuum cleaner 100 is operated, air enters from the hose connection port 11e (see FIG. 1) and is sucked into the electric blower 5 through the dust collecting case 2. Then, as the operation of the vacuum cleaner 100 is repeated, dust is accumulated in the dust collecting space Q2 (see FIG. 13) of the dust collecting case 2. At the same time, the mesh filter 22 (filter member 22a) and the dust collecting filter 23 (filter member 23a) are clogged. As the clogging progresses, air cannot be sucked from the dust collecting case 2 side, and the degree of vacuum in the space between the dust collecting case 2 and the electric blower 5 increases. As the degree of vacuum increases (a negative pressure acts on the indicator 4), the piston (not shown) of the indicator 4 (see FIG. 1) is sucked against the urging force of the spring. As a result, the piston moves to a position where it can be seen from the confirmation window 3a (see FIG. 2) of the lid body 3, so that the user can be notified that the dust collecting case 2 is clogged. Further, the air sucked from the intake port 3b (see FIG. 2) of the lid 3 is discharged from the outlet 3u (see FIG. 1) through the air passage 3t and the flow path in the indicator 4. Then, the air discharged from the outlet 3u is sent to the electric blower 5 through the cooling air intake portion 21a and the ventilation passage 11m to cool the electric blower 5.

15 is a cross-sectional view taken along the line XV-XV of FIG. 4, and FIG. 16 is a cross-sectional view showing the flow of cooling air from the cooling air intake portion. Note that FIG. 16 is a cross-sectional view when cut at the same position as in FIG.
As shown in FIG. 15, when the lid 3 is closed, the outlet 3u of the air passage 3t faces the cooling air intake portion 21a of the dust collecting case 2. Further, the packing 21c provided in the cooling air intake portion 21a is brought into close contact with the outlet 3u to ensure airtightness. As a result, almost all of the air discharged from the outlet 3u is sucked into the cooling air intake portion 21a (see arrow R1).

Further, in a state where the dust collecting case 2 is housed in the accommodating portion 11a of the vacuum cleaner main body 1, the packing 21 g of the dust collecting case 2 is in close contact with the frame 11f, and the dust collecting case 2 and the suction port of the electric blower 5 are brought into close contact with each other. Airtightness is ensured in the ventilation passage 11 m between the two.

As shown in FIG. 16, the air (cooling air) introduced from the cooling air intake portion 21a hits the filter member 23a (see arrow R1). When the air hits the filter member 23a, the dust adhering to the filter member 23a is blown off, and the clogging of the filter member 23a can be eliminated. After that, the direction is changed by the suction force of the electric blower 5 (see arrow R2), and the air is sucked into the electric blower 5 through the filter 15.

17A and 17B are explanatory views of the action and effect of the vacuum cleaner, in which FIG. 17A is the present embodiment and FIG. 17B is a comparative example.
By the way, in the vacuum cleaner 200 shown as a comparative example in FIG. 17B, the cooling air intake portion 203 is provided in the vacuum cleaner main body 201. Further, the vacuum cleaner 200 includes an electric blower 5 and a dust collecting case 202. Further, in the vacuum cleaner 200, in order to ensure airtightness in the space between the dust collecting case 202 and the electric blower 5, the discharge port of the dust collecting case 202 and the boundary wall 204 of the vacuum cleaner main body 201 are brought into close contact with each other. There is a need. In the vacuum cleaner 200 shown in the comparative example, since the cooling air intake portion 203 is provided on the vacuum cleaner main body 201 side, it is necessary to set the boundary wall 204 of the vacuum cleaner main body 201 to the line S100. Therefore, the position of the dust collecting case 2 needs to be in front of the line S100, and the vacuum cleaner 200 becomes large (front and rear dimensions L100).

On the other hand, in the vacuum cleaner 100 shown as the present embodiment in FIG. 17A, the cooling air intake portion 21a is provided in the dust collecting case 2. As a result, the line S1 of the boundary wall 11d can be brought closer to the electric blower 5 side. Therefore, when the volume V of the dust collecting case 2 is the same as that of the comparative example, the dimensions L1 (<L100) before and after the vacuum cleaner 100 can be shortened, and the vacuum cleaner 100 can be made compact.

As described above, the vacuum cleaner 100 of the present embodiment includes an electric blower 5 that generates suction force, a vacuum cleaner main body 1 that houses the electric blower 5, and dust collector that is detachably provided on the vacuum cleaner main body 1. The case 2 and the case 2 are provided. Further, in the vacuum cleaner 100, a negative pressure acts on the cooling air intake portion 21a (communication portion) communicating with the outside of the vacuum cleaner main body 1 between the dust collecting case 2 and the electric blower 5 and the cooling air intake portion 21a. An indicator 4 that communicates with the outside of the vacuum cleaner main body 1 is provided, and a cooling air intake portion 21a is provided in the dust collecting case 2. According to this, since the boundary wall 11d that separates the electric blower 5 of the vacuum cleaner main body 1 and the dust collecting case 2 can be shortened to the electric blower 5 side, electric cleaning is performed while maintaining the capacity V of the dust collecting case 2. The machine 100 can be made compact (see FIG. 17 (a)).

Further, in the present embodiment, the dust collecting case 2 can be removed from the vacuum cleaner main body 1 by providing the cooling air intake portion 21a in the dust collecting case 2. As a result, the cooling air intake portion 21a can be cleaned, and clogging of the cooling air intake portion 21a can be easily cleared.

Further, in the present embodiment, the dust collecting case 2 is provided with the dust collecting filter 23, and the cooling air intake portion 21a is provided at a position where the dust collecting filter 23 can be seen from the opening 21b (see FIG. 13). According to this, the cooling air taken in from the cooling air intake unit 21a can be applied to the dust collecting filter 23, and the clogging of the dust collecting filter 23 can be eliminated.

Further, in the present embodiment, the cooling air intake portion 21a has an inner wall surface 21a2 (first inclined surface) that inclines toward the dust collecting filter 23 (see FIG. 13). According to this, the cooling air taken in from the cooling air intake portion 21a can be easily directed to the dust collecting filter 23, and the clogging of the dust collecting filter 23 can be easily cleared.

Further, in the present embodiment, the inner wall surface 21a3 (second inclined surface) which is inclined toward the dust collection filter 23 with respect to the inner wall surface 21a2 at the end of the cooling air intake portion 21a on the side opposite to the cooling air intake side. (See FIG. 13). According to this, it becomes easier to direct the cooling air toward the dust collecting filter 23, and it becomes easier to further clear the clogging of the dust collecting filter 23.

Further, in the present embodiment, the cooling air intake portion 21a is formed at a position where it does not overlap with the dust collecting filter 23 in the upward direction (see FIG. 13). According to this, the cooling air can be applied not only to the front side (upper side) of the dust collecting filter 23 but also to the back side (lower side).

In the above-described embodiment, the vacuum cleaner 100 provided with the indicator 4 has been described as an example, but it may be applied to a vacuum cleaner having only the function of a valve body that operates by negative pressure.

1 Vacuum cleaner body 2 Dust collection case 3 Lid body 4 Indicator (valve body)
5 Electric blower
11a Storage section 21a Cooling air intake section (communication section)
21b Opening 21a1 Duct part 21a2 Inner wall surface (first inclined surface)
21a3 Inner wall surface (second inclined surface)
21f Outlet 22 Mesh filter 22a Filter member 23 Dust collection filter 23a Filter member 100 Vacuum cleaner

Claims (4)

An electric blower that generates suction force and
The vacuum cleaner body that houses the electric blower and
A dust collecting case that is detachably provided in the accommodating part of the vacuum cleaner body and is equipped with a dust collecting filter,
A lid that is rotatably attached to the vacuum cleaner body so as to open and close the upper opening of the accommodating portion.
A communication portion provided in the dust collecting case and communicating with the outside of the vacuum cleaner main body,
A valve body provided on the lid and communicating with the outside of the vacuum cleaner body by applying a negative pressure to the communicating portion is provided .
The communication portion is an electric vacuum cleaner that communicates between the dust collection filter and the discharge port of the dust collection case, and the opening of the communication portion is formed upward. The vacuum cleaner according to claim 1, wherein the communication portion is provided at a position where the dust collecting filter can be seen from the opening of the communication portion. The communication unit, an electric vacuum cleaner according to claim 2, characterized in that it comprises a duct section which have a first inclined surface inclined from said opening so as to approach to the dust-collecting filter towards the dust filter .. The communication portion is characterized in that the end portion of the communication portion on the side opposite to the side that takes in the cooling air has a second inclined surface that is inclined toward the dust collecting filter with respect to the first inclined surface. The electric vacuum cleaner according to claim 3.

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