JP2020031969A - Vacuum cleaner - Google Patents

Abstract

To provide a vacuum cleaner capable of suppressing an increase in temperature rise of a substrate even when input is large.SOLUTION: A vacuum cleaner includes an electric blower, a case holding the electric blower, and a control substrate controlling the electric blower. The case is provided with an opening going through inside and outside the case. The opening inside the case is provided at a position where exhaust of the electric blower is taken in. In the vacuum cleaner where openings outside the case are arranged in the way that exhaust of the electric blower is in contact with at least a part of the control substrate, a plurality of openings outside the case are provided so that exhaust can be divided.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a vacuum cleaner.

In recent years, small and lightweight vacuum cleaners with good operability have been demanded. However, on the other hand, strong suction power is also desired, and in order to increase the suction power, it is possible to reduce the loss by devising the shape of the air path inside the vacuum cleaner or to increase the power of the electric blower There is. In the case of power-up of an electric blower, there is a limit in terms of noise and current. Here, the output of the current can be improved by increasing the input, but the amount of heat also increases. The temperature of the exhaust from the electric blower rises accordingly. Therefore, the substrate built in the main body cannot withstand heat, so how to cool the substrate is key.
Here, in the vacuum cleaner described in Patent Document 1, a radiator plate is attached to a circuit board, and the radiator plate is cooled by being exhausted from an air exhaust port provided in a motor case of a motor unit. Have been.

JP 2004-57215 A

  In the structure described in Patent Document 1, hot air that has passed through the electric motor of the electric blower is generated, so that it cannot be used for cooling the substrate. With a vacuum cleaner having a small input, the heat generated by the motor of the electric blower is small, so that the cooling effect of the substrate can be expected. However, with a vacuum cleaner having a large input, the exhaust of the motor blower cannot be used for cooling the substrate.

  In view of the above, an object of the present invention is to provide a vacuum cleaner that can suppress a rise in the temperature of a substrate by using the exhaust of the electric blower for cooling the substrate even when the input of the electric blower is large.

  The present invention includes an electric blower, a case for holding the electric blower, and a control board for controlling the electric blower, wherein the case has an opening penetrating inside and outside the case, and the opening in the case is an electric blower An opening outside the case is provided at a position for taking in exhaust gas, and a plurality of openings are provided in the case so as to divide the exhaust gas in an electric vacuum cleaner arranged so that the exhaust gas of the electric blower hits at least a part of the control board. It is characterized in that the opening is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum cleaner which can suppress the temperature rise of a board | substrate even if input is large can be provided.

It is an external appearance perspective view showing the whole vacuum cleaner concerning this embodiment. FIG. 2 is a partially exploded perspective view showing a cleaner body. It is a perspective view which shows the state which opened the dust case cover in the cleaner main body. It is a rear view of a vacuum cleaner main body. It is a top view of an upper case. It is a perspective view showing the state where the exhaust cover was removed from the cleaner body. It is a rear view of the cleaner main body shown in FIG. It is a longitudinal section of a vacuum cleaner main part. It is a perspective view of a case. FIG. 9 is a sectional view taken along line AA of FIG. 8. FIG. 9 is a sectional view taken along line BB of FIG. 8. It is sectional drawing of a wheel. It is a perspective view which shows a separate handle.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings as appropriate. However, the present embodiment is not limited to the following contents, and can be implemented with appropriate modifications within the scope of the present invention.

FIG. 1 is an external perspective view illustrating the entire vacuum cleaner according to the present embodiment.
As shown in FIG. 1, the vacuum cleaner 1 includes a cleaner body 2, a hose 3, an operation pipe 4, an extension pipe 5, a suction tool 6, a separate handle 30, and the like.

  One end of the hose 3 is connected to the cleaner body 2, and the other end is connected to one end of the operation pipe 4. The operation tube 4 includes a grip 4a including a hand operation switch and the like. The extension tube 5 is configured to be extendable and contractible by an outer tube 5a and an inner tube 5b.

FIG. 2 is a partially exploded perspective view showing the cleaner body.
As shown in FIG. 2, the cleaner body 2 is a so-called paper pack type, and includes a lower case 11, an upper case 12, a dust case cover 13, and an exhaust cover 14.

  The lower case 11 constitutes a lower shell (appearance) of the lower portion of the cleaner body 2, and is made of a synthetic resin material (not fiber reinforced) such as PP (Polypropylene) resin. The lower case 11 has a concave portion 11a whose upper part is opened in a substantially rectangular shape, and has an electric blower 15 for generating a suction force, a case 16 for housing the electric blower 15, a cord reel 17, and an electric blower 15 (see FIG. 8). ) Is accommodated. Further, the lower case 11 has a dust collecting portion 19 for storing dust collected by the suction force of the electric blower 15.

  In the lower case 11, the electric blower 15, the code reel 17, and the control board 18 are disposed at a position rearward from a substantially center in the front-rear direction, and a dust collecting unit 19 is disposed at a position frontward from a substantially center in the front-rear direction. The electric blower 15 and the code reel 17 are arranged in the front-rear direction, and the code reel 17 is arranged behind the electric blower 15. The control board 18 is disposed above the case 16 that houses the electric blower 15. A lid packing 19 a is attached in an annular shape to the upper edge of the dust collecting section 19. FIG. 3 shows a state in which an unused paper pack 22 is stored.

  The upper case 12 has a shape that covers the entire upper side of the electric blower 15, the code reel 17, and the control board 18, and is configured to be fixed to the lower case 11, and is formed of a material reinforced with glass fiber of PP resin or the like. . Further, on the upper part of the upper case 12, a take-up button 23 which is pressed when the power cord 17b (see FIG. 8) of the code reel 17 is taken up is provided. The take-up button 23 is urged upward by a spring (not shown).

  The dust case cover 13 forms a part of the outer shell (appearance) of the upper part of the cleaner body 2, and mainly opens and closes the upper part of the dust collecting part 19. The dust case cover 13 is formed of a synthetic resin material (not fiber reinforced) such as an ABS resin. Further, the dust case cover 13 is formed to have an upwardly convex shape by a surface having no irregularities on the outer surface 13a.

  The exhaust cover 14 constitutes a part of the outer shell (appearance) of the upper part of the cleaner body 2, and is provided adjacent to the rear of the dust case cover 13. The exhaust cover 14 is formed of a synthetic resin material (not fiber reinforced) such as an ABS resin.

  The exhaust cover 14 has an outer surface 14a having the same curvature as the outer surface 13a of the dust case cover 13. When the dust case cover 13 is closed (see FIG. 1), the outer surface 14a and the outer surface of the dust case cover 13 are closed. 13a is configured to be flush.

  The exhaust cover 14 includes an opening 14b that exposes the operation surface of the take-up button 23, a plug outlet 14c from which the connection plug 17c is drawn (see FIG. 4), and an exhaust port 14d for exhausting to the outside. have.

FIG. 3 is a perspective view showing a state where a dust case cover is opened in the cleaner body.
As shown in FIG. 3, a rib 13 b is formed on the back surface of the dust case cover 13 so as to protrude along the lid packing 19 a of the dust collecting portion 19. On the back surface of the dust case cover 13, a lock member 13c is provided which is engaged with the front end of the hose port 21 and locked.

  In the upper part of the upper case 12, a hinge portion 12b for rotatably supporting the dust case cover 13 is formed near the exhaust cover. The dust case cover 13 is configured to be opened until it is directed vertically upward.

  The dust collecting section 19 communicates with a hose connection port 21b formed in the hose port 21 and also communicates with a space in which the electric blower 15 (see FIGS. 3 and 8) is stored via a filter 19b. In the present embodiment, a paper pack type is described as an example, but the present invention can also be applied to a cyclone type vacuum cleaner.

FIG. 4 is a rear view of the cleaner body.
As shown in FIG. 4, large-diameter wheels 20a, 20a are rotatably attached to the rear left and right side surfaces of the lower case 11. The lower case 11 is provided with wheels 20b whose direction can be changed.

  The exhaust port 14d formed in the exhaust cover 14 has a plurality of slit-shaped holes 14d1 and is arranged in parallel with each other. The exhaust port 14d is formed asymmetrically from left to right from the upper portion of the exhaust cover 14 on the curved outer surface 14a to the left end. The plug outlet 14c is formed so as to protrude from the right end of the outer surface 14a, and has a hole that is open on the right and rear sides.

FIG. 5 is a plan view of the upper case.
As shown in FIG. 5, the upper case 12 has screw insertion holes 12 c for screw fixing to the lower case 11 at substantially the left and right ends of the front end and substantially at the center of the rear end. Further, the upper case 12 is formed with screw insertion holes 12d at the left and right ends substantially at the center in the front-rear direction, through which screws for fixing the exhaust cover 14 to the upper case 12 are inserted. Bosses 12e, 12e for fixing the exhaust cover 14 with screws are formed on the rear surface of the upper case 12 so as to protrude rearward.

  In the upper case 12, a substantially rectangular exhaust communication hole 12f is formed on the left side of the rear part, and a substantially rectangular exhaust communication hole 12g is formed on the right side of the rear part. Further, the upper case 12 is formed with a regulating plate 12h for regulating the connection plug 17c from being pulled into the cleaner body 2. The restriction plate 12h has a hole 12h1 from which the power cord 17b is drawn out.

  The upper case 12 is made of glass fiber reinforced plastic containing glass fiber, and has higher rigidity than ABS resin which is a resin containing no glass fiber. The upper case 12 is formed of, for example, a thermoplastic resin (for example, a PP resin or an ABS resin) containing glass fibers made of short fibers. Specifically, by using a PP resin rather than an ABS resin, weight reduction can be achieved.

FIG. 6 is a perspective view showing a state where an exhaust cover is removed from the cleaner body. In FIG. 6, the power cord 17b of the code reel 16 is not shown.
As shown in FIG. 6, when the exhaust cover 14 is removed from the cleaner body 2, the exhaust communication holes 12f and 12g are exposed. The exhaust communication holes 12f and 12g allow the air exhausted from the case 16 (see FIGS. 2 and 8) accommodating the electric blower 15 to pass through the upper case 12 from the electric blower 15 side to the exhaust cover 14 side. It is configured as a passage that passes through.

  In the vacuum cleaner 1 configured as described above, the lower case 11 made of PP resin (not including glass fiber) including the electric blower 15 and the dust collecting portion 19 and the upper case of the electric blower 15 An upper case 12 made of a resin containing glass fiber to be attached, and a cover (a dust case cover 13 and an exhaust cover 14) made of an ABS resin (not including glass fiber) for concealing the upper case 12 when using a vacuum cleaner (see FIG. 1). ). According to this, the high-rigidity vacuum cleaner main body 2 can be configured by applying the upper case 12 made of glass fiber-containing resin instead of configuring the entire case (housing) with ABS resin or the like. Moreover, in the vacuum cleaner 1, since the upper case 12 can be made invisible from the outside by being concealed by the upper case 12 made of glass fiber-containing resin, the appearance can be prevented from being impaired. Furthermore, in the electric vacuum cleaner 1, by using, for example, sheet insert molding using the dust case cover 13 made of ABS and the exhaust cover 14 made of ABS, the electric cleaner having a high design quality (high quality in appearance) is used. Machine 1 can be realized.

  Further, in the vacuum cleaner 1, since the cover that covers the upper case 12 is composed of two parts: the dust case cover 13 that opens and closes the dust collecting unit 18 and the exhaust cover 14 that has the exhaust port 14d. When the dust part 18 is opened and closed, it is possible to prevent the dust part 18 from protruding outside from the cleaner body 2, and the dust case cover 13 can be opened and closed compactly.

  Further, in the vacuum cleaner 1, the exhaust communication holes 12f and 12g of the upper case 12 are concealed by the exhaust cover 14 (because the exhaust communication holes become invisible from the outside), so that the degree of freedom of the exhaust communication holes 12f and 12g is increased. And it becomes easy to adjust the direction of exhaust and the amount of exhaust.

FIG. 7 is a rear view of the cleaner body shown in FIG.
As shown in FIG. 7, a substantially semicircular opening 12 m is formed on the back surface of the upper case 12. In the opening 12m, elongated plate-like walls 12m1, 12m2, and 12m2 extending in the vertical direction are formed. Exhaust communication holes 12n1, 12n1, 12n2, and 12n2 are formed on both left and right sides of the walls 12m1, 12m2, and 12m2 to communicate the inside and outside of the upper case 12. The exhaust communication holes 12n1 and 12n2 are configured as passages through which air discharged from the electric blower 15 (see FIGS. 2 and 8) passes through the upper case 12 from the electric blower 15 to the exhaust cover 14 side. I have.

FIG. 8 is a vertical sectional view of the cleaner body.
As shown in FIG. 8, the electric blower 15 is configured to include a fan motor unit 15d in which a fan 15a and an electric motor 15b are housed in a metal housing 15c, and a case 16 in which the fan motor unit 15d is housed. I have.

  In addition, the electric blower 15 is placed sideways so that the fan 15a faces forward, and an intake port 15e for sucking exhaust gas from the dust collecting portion 19 is formed on the front surface. The fan motor unit 15d is housed in a synthetic resin case 16 via a vibration-proof rubber 15f. The case 16 is fitted and fixed in the lower case 11.

  9 is a perspective view of the case 16, FIG. 9 (a) is a perspective view from the front, and FIG. 9 (b) is a perspective view from the back. The location where the vibration-proof rubber 15g is stored has a shape that is covered with a rib 16a. The case 16 has a substantially cylindrical portion 16b, an opening 16c, and a control board mounting portion 16d. The bottom surface portion 16e of the cylindrical portion 16b has a flat portion 16e1 and a concave portion 16e2 protruding outside the case 16 beyond the flat portion 16e1.

  The cylindrical shape 16f and the cylindrical shape 16g have a substantially cylindrical shape, and fit with the fixing boss of the lower case 11. The cylindrical shape differs between the left and right. The right cylindrical shape 16f has a hole (not shown) in the upper surface, and a projection (not shown) is provided at the tip of the fixing boss of the lower case. Accurate positioning is possible by fitting a cylindrical 16f hole into the projection. Further, no hole is formed in the left cylindrical shape 16g. If holes are provided as needed, the fixing boss (not shown) of the lower case is provided with a screw hole in advance, so that consideration is given so that fixing with a screw can be selected. The hole 16h of the case 16 is fitted to a fixing boss of the lower case, not shown. By this three-point support, the case can be stably fixed in the lower case only by fitting.

  The control board mounting portion 16d is positioned by fitting the boss shape 16i1 and the boss shape 16i2 of the case 16 into holes (not shown) of the control board 18 so as to surround the periphery of the control board 18. By the ribs 16j1, 16j2, 16j3, 16j4, the movement of the control board 18 after attachment is suppressed, and the control board 18 is prevented from coming off by the claws 16k1, 16k2, 16k3, 16k4 of the case 16. The display substrate 18a also includes ribs 18m1, 18m2, and 18m3 for suppressing movement to the periphery, and is fixed by claws 18n for preventing the display substrate from coming off.

  Further, a lead wire (not shown) is attached to the control board 18, and the fixed shape 16 p 1, 16 p 2 for fixing the lead wire is provided in the case 16, so that the lead wire can move freely. Is suppressed. In addition, by fixing the arrangement of the lead wires, it is possible to suppress a variation in work at the time of assembly. The arrangement of the lead wires around the control board 18 is important particularly for the noise resistance. Also, if the lead wire touches the peripheral edge of the control board 18, the lead 16 may be damaged. Therefore, a rib 16 j 3 is provided on the case 16 around the lead wire so that the lead wire does not touch the edge of the control board 18. A rib 16j3 for suppressing the movement of the controller board 18 is also provided.

  The method of assembling the cord reel 17 after attaching the case 16 and the electric blower 15 to the lower case 11 is adopted, and the rib 17d (see FIG. 8) of the cord reel 17 hinders the assembling. A step 16q is provided in the case 16 as a form to escape the rib 17d, so that the rib 17d escapes when the cord reel 17 is assembled from top to bottom. Further, after the cord reel 17 is assembled, the rib 17d fits into the recess 16r of the case 16 so as to be hooked, so that the assembled code reel 17 is prevented from floating.

  The exhaust air from the electric blower 15 is radially discharged from the opening of the electric blower 15. A plurality of openings 16c and 16s are provided in the case 16 so that the exhaust gas flows smoothly and smoothly inside the case 16, and the exhaust gas is discharged to the outside of the case 16 through the openings 16c and 16s. By appropriately arranging the positions and sizes of the openings 16c and 16s, it is possible to reduce the flow path resistance of the cleaner body 2 and reduce the body loss. In addition, the temperature rise can be suppressed by directly applying the exhaust gas passing through the opening 16c of the case 16 to a cooling plate (not shown) provided on the control board 18 for the purpose of cooling the control board 18 by air cooling. it can.

  On the other hand, the electric blower 15 includes a fan 15a and an electric motor 15b, and includes a fan 15a that performs intake and exhaust and an electric motor 15b that rotates the fan 15a. Since the exhaust air of the fan 15a is exhausted while cooling the electric motor 15b on the downstream side, the exhaust temperature of the electric blower 15 increases. As the input increases, the amount of heat generated increases accordingly, so the exhaust temperature also increases. Therefore, if the exhaust temperature is too high, the temperature exceeds the heat-resistant temperature of the control board 18, so that the cooling plate provided on the control board 18 cannot be cooled.

  In the fan motor unit 15d, a metal housing 15c that covers the fan 15a is divided into the fan 15a side and the electric motor 15b side, and a gap is generated in the process during assembly. Exhaust gas that has passed through the gap is not heated because it does not pass through the motor 15b. Further, when an opening is provided in the housing 15c behind the fan 15a to improve the output of the electric blower 15, the exhaust passing through the opening cannot be heated, which is effective for cooling the control board 18.

  An air passage 16t that directly carries exhaust gas that does not pass through the motor 15b to the cooling plate of the control board 18 is provided above the case 16. The air passage 16t has an inlet 16u, which is an opening in the case, located at the rear of the fan 15a of the electric blower 15, and takes in exhaust gas that does not pass through the electric motor 15b. The opening 16c of the case 16 provided immediately below the cooling plate of the control board 18 is connected to the outlet 16v, which is an opening outside the case of the air passage 16t. Here, if space is taken structurally, the opening 16c of the case 16 and the outlet 16v of the air passage 16t may be separately provided to increase the cooling efficiency.

The inflow port 16u is covered on all sides with partition walls so as to mix as little as possible with the heated exhaust gas. Before the exhaust reaches the outlet 16v, the air passage 16t shortens the partition wall 16w on the side where the control board 18 is located, so that the exhaust can cool the control board 18 while passing through the air passage 16t. . Further, the partition 16w of the air passage 16t may be extended to the outlet 16v so that the exhaust is concentrated on the cooling plate only.
By providing the air passage 16t in the case 16, the exhaust air of the electric blower 15 can be effectively used for each application.

  A turbulent flow is generated in the exhaust of the electric blower 15 in the case 16, and the case 16 is provided with a rectifying plate 16 x for the purpose of rectifying the turbulent flow. The current plate 16x promotes exhaust in the case 16 in one direction, thereby reducing the body loss and the noise by reducing the flow path resistance. The rectifying plate 16x is provided on the right side surface of the case 16, so that exhaust flows clockwise when viewed from the front of the case 16. The exhaust in the case 16 flows clockwise, and the lower right flows to the lower left, so that the exhaust passes through the farthest place from the upper surface of the cleaner body 2. Since the exhaust gas has a high wind speed in the case 16, noise is reduced by a shielding effect.

A plurality of rectifying ribs 16y are provided on the rectifying plate 16x, and the rectifying plate 16x is provided so that the exhaust can separate the flow even at the interface of the rectifying plate 16x to effectively rectify the flow.
The current plate 16x has a substantially arc shape when viewed from the front, and has a shape that sinks below the electric blower 15. Since the rectifying effect is lost when the squeezing shape is short, it is more effective to increase the length of the substantially circular arc. Since the shape of the upper surface for fixing the control board 18 to the case 16 is complicated, a method of dividing the mold of the case 16 in the vertical direction of the case 16 is generally adopted. The substantially arc-shaped sunk-in shape of the current plate 16x is difficult to form due to the mold structure, and therefore becomes short. When the case 16 is formed by a vertically divided mold, the case 16 is generally used as a two-part structure in which the case 16 is vertically divided. However, in the case of a two-part configuration, two molds are also formed, so that initial investment and running costs are also required. Also, in addition to the upper and lower divisions of the case 16, there is also a method in which only the rectifying plate 16x is a separate component, and it is less expensive than the two-part configuration of the case 16. By using these methods, the case 16 can be provided with the rectifying plate 16x having a high rectifying effect.

  In this embodiment, the case 16 is divided into front and rear molds, so that the length of the straightening plate 16x can be freely changed. Therefore, it is possible to maximize the length of the substantially arc shape having a high straightening effect. Further, in the control board mounting portion 16d, by using a mold with an additional slide, the mold can be manufactured with the same simplicity as the upper and lower divisions of the case 16. Although there are various restrictions on the shape of the case 16 due to the problem of the mold structure, the mold with front and rear divisions of the case 16 has less restrictions and can be designed with relatively high flexibility.

  The substantially annular concave portion 16e2 of the case 16 is housed in the case 16 via an anti-vibration rubber 15g for fixing the electric blower 15. The anti-vibration rubber 15g is disposed so as to be surrounded on all sides by the recess 16e2, and suppresses movement in the rotation direction on the inner side surface of the recess 16e2. In addition, by receiving the vibration-proof rubber 15g at the flat portion 16e3 on the front side of the concave portion 16e2, the movement in the front-rear direction is also suppressed. At least a part of the recess 16e2 is formed by a rib 16a, and the rib is reinforced to withstand a drop impact.

  The vacuum cleaner main body 2 has a handle 21 c having a concave shape in cross section for lifting the vacuum cleaner main body 2 with a finger and transporting the cleaner main body 2 on the lower surface of the front end of the lower case 11 (below the hose connection port 21 b). ing.

  In the upper part of the cleaner body 2, a space Q1 is formed between the upper case 12 and the dust case cover 13, and a space Q2 is formed between the upper case 12 and the upper surface 14s of the exhaust cover 14. A space Q3 is formed on the back of the cleaner body 2 between the upper case 12 and the back surface 14t of the exhaust cover 14.

  A control board 18 composed of a board 18c on which various electric components 18b are provided is attached to the upper portion of the case 16 by claws. The electric component 18b is provided on the upper surface of the substrate 18c. A space Q4 through which air flows is formed between the control board 18 and the upper case 12.

  The cord reel 17 includes a reel portion 17a that winds or unwinds the cord 17b, and a power cord 17b that is connected to a commercial power supply. The reel portion 17a is rotatably supported in the lower case 11 such that the rotation shaft 17g is arranged in the front-rear direction.

FIG. 10 is a sectional view taken along line AA of FIG.
As shown in FIG. 10, in the electric blower 15, the lower surface of the case 16 is the opening 16 s, and after the exhaust from the electric blower 15 is radially exhausted, the exhaust is rectified by the rectifying plate 16 x of the case 16 ( After the outline arrow R1), the air is exhausted in one direction (from left to right). Therefore, the rectified exhaust gas can reduce the number of noises caused by the turbulent flow and the loss of the air path.

  Also, as shown by the white arrows in FIG. 10, the exhaust gas rectified in the case 16 is discharged from the opening (lower outlet) 16s below the case 16, and the exhaust gas flows upward (see the arrow R2). Then, the control board 18 flows from right to left (see arrow R3), and the control board 18 is cooled. Thereafter, it is configured to flow backward (see arrow R4) through the communication hole S1 indicated by hatching. In addition, behind the electric blower 15, the edge of the disk 17a1 of the reel portion 17a and the edge of the partition plate 12i extending downward from the back surface (lower surface) of the upper case 12 come into contact with the wall surface. Is configured. As a result, the exhaust gas discharged from the exhaust part 16 d is prevented from directly flowing toward the code reel 17.

FIG. 11 is a sectional view taken along line BB of FIG. In FIG. 11, the cord portion of the power cord 17b is not shown, and only the connection plug 17c is shown.
As shown in FIG. 11, the exhaust gas (see arrow R5) that has passed through the communication hole S1 (see FIG. 10) flows toward the exhaust communication holes 12f and 12g and cools the code reel 17 (see FIG. 8). While flowing. The exhaust gas that has passed through the exhaust communication hole 12f flows between the upper case 12 and the exhaust cover 14, and is exhausted from a hole on the left side of the exhaust port 14d (see an arrow R6). Exhaust gas that has passed through the exhaust communication hole 12g flows between the upper case 12 and the exhaust cover 14, and is exhausted from a hole on the right side of the exhaust port 14d (see arrow R7). Exhaust gas that has not passed through the exhaust communication holes 12f and 12g is discharged outside through a gap between the plug lead-out hole 14c into which the power cord 17b is inserted and the power cord 17b (see arrow R8).

FIG. 12 is a sectional view of a wheel.
As shown in FIG. 12, the wheel 20a is formed of PP resin. In the wheel 20a, a shaft portion 20d rotatably supported by the lower case 11 is formed at a radial center of a disk-shaped wheel main body 20c. A recess 20e to which the sheet 20f can be attached is formed on almost the entire outer surface of the wheel main body 20c, and the seat 20f is provided by the sheet 20f over almost the entire surface visible from the outside of the wheel 20a. A highly designed vacuum cleaner can be realized.

  In the electric vacuum cleaner 1 thus configured, the electric blower 15 and the code reel 17 are arranged back and forth in the cleaner main body 2 (see FIG. 8), and the control board 18 is provided on the upper surface of the electric blower 15. Thus, the width of the main body can be reduced while maintaining high power.

  Further, in the electric vacuum cleaner 1, by providing the exhaust unit 16 s on the lower surface of the electric blower 15, the width of the electric blower 15 can be reduced, and the width of the cleaner main body 2 can be reduced. According to this, most of the air discharged from the electric blower 15 is formed in a flow path crossing the control board 18, and if the control board 18 is arranged above the electric blower 15, the width of the cleaner body 2 is reduced. The operability can be improved.

  Further, in the vacuum cleaner 1, the control board 18 is disposed above the electric blower 15, and in the space between the upper case 12 and the exhaust cover 14 on the opposite side to the exhaust part 16 d with the electric blower 15 interposed therebetween. A communication hole S1 through which exhaust gas flows is formed. According to this, the control board 18 can be efficiently cooled.

  Further, in the electric vacuum cleaner 1, since the periphery of the electric blower 15 is covered with the triple wall by the case 16, the upper case 12, and the exhaust cover 14, there is also an effect that noise (exhaust sound and the like) can be reduced. .

  In addition, since the air passage 16t is provided in the case 16 and the exhaust of the electric blower 15 is divided into upper and lower parts to be used for cooling the control board 18, the temperature rise of the control board can be suppressed. Also, there is an effect that noise due to the partition 16w for dividing vertically can be reduced.

  Furthermore, since the upper case 12 is covered with the dust case cover 13 and the exhaust cover 14, an external impact is not directly applied to the upper case 12, so that the upper case 12 can be made thinner. The weight can be reduced.

  Next, the separate handle 30 will be described with reference to FIG. FIG. 13 is a perspective view showing a separate handle, and the separate handle 30 can be appropriately selected by a user as to whether the handle is attached (see FIG. 1) or not.

  As shown in FIG. 13, the separate handle 30 includes a substantially cylindrical hose insertion portion 31 through which a joint (not shown) of the hose 3 (see FIG. 1) is inserted, and a grip 32 which is a portion to be gripped by a user's hand. , And a pair of arms 33, 33 for joining the hose insertion portion 31 and the grip 32. A hand can be inserted into a space surrounded by the grip 32, the arms 33, 33, and the hose insertion portion 31, and the grip 32 can be grasped by hand.

  The present invention is not limited to the embodiments described above, and can be appropriately changed without changing the scope of the present invention. For example, in the present embodiment, the case where the code reel 17 is provided in the cleaner body 2 has been described as an example, but the present invention may be applied to the cleaner body 2 without the code reel 17.

  Further, in the present embodiment, the case where the upper case 12 is concealed by the dust cover 13 and the exhaust cover 14 is described as an example of the cover for concealing the upper case 12, but the upper case 12 is concealed when the cleaner is used. If possible (if not visible from the outside), the dust case cover 13 and the exhaust cover 14 may be composed of one component.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Vacuum cleaner main body 11 Lower case 12 Upper case 13 Dust case cover (dust collection lid)
14 Exhaust cover 14d Exhaust port 15 Electric blower 15g Anti-vibration rubber 16 Case 16t Air path 16u Inlet 16v Outlet 16w Partition 16x Rectifying plate 16y Rectifying rib 17 Code reel 18 Control board 19 Dust collector 20a Wheel S1 communication hole

Claims (4)

  An electric blower, a case for holding the electric blower, and a control board for controlling the electric blower, wherein the case has an opening penetrating inside and outside the case, and the opening in the case takes in exhaust air of the electric blower. Position, the opening outside the case is a vacuum cleaner arranged so that the exhaust of the electric blower hits at least a part of the control board, a plurality of the openings in the case so that the exhaust can be divided. An electric vacuum cleaner characterized by being provided.   An electric blower, a case for holding the electric blower, and a control board for controlling the electric blower, wherein the case has an opening penetrating inside and outside the case, and an inflow port as an opening in the case is an electric blower. The exhaust port is provided at a position for taking in the exhaust, and the outlet, which is an opening outside the case, is a vacuum cleaner arranged so that the exhaust of the electric blower hits at least a part of the control board. A vacuum cleaner having an integrated flow path such that the number of the outlets is smaller than the number of the inlets.   An electric blower, a case for holding the electric blower, and a control board for controlling the electric blower, wherein the case has an opening penetrating inside and outside the case, and an inflow port as an opening in the case is an electric blower. A vacuum outlet provided at a position for taking in exhaust gas, and an outlet, which is an opening outside the case, is arranged such that exhaust gas from the electric blower hits at least a part of the control board. A vacuum cleaner having a flow path, wherein at least one of the exhaust flow paths is independent.   An electric vacuum cleaner comprising: an electric blower; a case for holding the electric blower; and a control board for controlling the electric blower, wherein the case includes a plurality of openings penetrating inside and outside the case.

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