JP2017023293A - Suction port body and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body and vacuum cleaner capable of preventing the invasion of a foreign matter and dust to the circumference of a motor as much as possible and also securing the circulation of cooling air of the motor.SOLUTION: A suction port body 26 includes: a lower case 35 partitioning the lower half part of a suction chamber 38 and the lower half part of a motor chamber 39; an upper case 36 combined with the lower case 35 so as to close the upper half part of the motor chamber 39; an upper cover 37 arranged adjacent to the upper case 36 and combined with the lower case 35 so as to close the upper half part of the suction chamber 38; a connection pipe part 33 connected to the suction chamber 38 and applying a negative pressure on the suction chamber 38; a driven body 29 arranged in the suction chamber 38; and a motor 31 arranged in the motor chamber 39 and generating the drive force of the driven body 29. The upper case 36 or the lower case 35 includes: a suction port 61 connected to the motor chamber 39 and having no filter body; and an exhaust port 63 connected to the suction chamber 38 or the connection pipe part 33 and having a filter body 62 or no filter body.SELECTED DRAWING: Figure 5

Description

  Embodiments according to the present invention relate to a suction port body and a vacuum cleaner.

  2. Description of the Related Art A suction port body that includes an electric motor that drives a cleaning body in the suction port body is known.

  The conventional suction inlet body is provided with the introduction window which distribute | circulates the air which cools an electric motor to a suction inlet main body, and the discharge | emission window. These windows are provided with a filter that prevents foreign substances and dust from entering.

Japanese Patent Laid-Open No. 55-130632

  In a conventional suction port, if the filter of the suction window becomes clogged with foreign matter or dust, the motor will not be sufficiently cooled, causing overheating, which will eventually damage the motor or shorten its life. .

  In view of this, the present invention proposes a suction port body and a vacuum cleaner that can prevent the entry of foreign matter and dust around the motor as much as possible while ensuring the flow of cooling air from the motor.

  In order to solve the above-described problem, a suction port body according to an embodiment of the present invention includes a lower case that defines a lower half portion of a suction chamber having a suction port on a bottom surface and a lower half portion of an electric motor chamber adjacent to the suction chamber. An upper case that is combined with the lower case and closes the upper half of the motor chamber; an upper cover that is adjacent to the upper case and is combined with the lower case and closes the upper half of the suction chamber; and A conduit connected to the suction chamber for applying a negative pressure to the suction chamber, a driven body disposed in the suction chamber, and an electric motor disposed in the motor chamber for generating a driving force of the driven body; The upper case or the lower case is connected to the electric motor chamber, the filter body has a non-installed intake port, and the upper case or the lower case is connected to the suction chamber or the pipe line And filter body is installed or not installed And it has an exhaust port.

  The vacuum cleaner according to an embodiment of the present invention includes a vacuum cleaner body, an electric blower that is housed in the vacuum cleaner body and generates a negative pressure, and the suction that sucks in air with a negative pressure generated by the electric blower. And a mouth.

The perspective view of the vacuum cleaner which concerns on embodiment of this invention. The perspective view of the top | upper surface side of the suction inlet which concerns on embodiment of this invention. The top view of the suction inlet which concerns on embodiment of this invention. Sectional drawing of the suction inlet which concerns on embodiment of this invention. The top view which removed the upper case and the upper cover, which is a suction port body according to the embodiment of the present invention. It is another example of the suction inlet body which concerns on embodiment of this invention, Comprising: The top view which removed the upper case and the upper cover.

  Embodiments of a suction port body and a vacuum cleaner according to the present invention will be described with reference to FIGS. 1 to 6.

  FIG. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

  As shown in FIG. 1, the vacuum cleaner 1 according to the present embodiment is a so-called canister-type vacuum cleaner. The electric vacuum cleaner 1 includes a vacuum cleaner body 2 that can travel on the surface to be cleaned, and a pipe portion 3 that is detachable from the cleaner body 2. The vacuum cleaner body 2 and the pipe portion 3 are fluidly connected.

  The vacuum cleaner main body 2 includes a main body case 5, a pair of wheels 6 provided on the left and right sides of the main body case 5, a removable dust separating device 7 disposed in the front half of the main body case 5, and the main body case 5. The electric blower 8 accommodated in the latter half of the main body, a main body control unit 9 that mainly controls the electric blower 8, and a power cord 11 that guides electric power to the electric blower 8.

  The vacuum cleaner main body 2 drives the electric blower 8 with the electric power supplied through the power cord 11, and causes the negative pressure generated by the drive of the electric blower 8 to act on the pipe portion 3. The vacuum cleaner 1 sucks air containing dust (hereinafter referred to as “dust-containing air”) from the surface to be cleaned through the pipe portion 3, separates the dust from the dust-containing air, and collects the separated dust. Then, clean air from which dust has accumulated and exhausted is exhausted.

  A main body connection port 12 is provided on the front surface of the main body case 5. The main body connection port 12 is a fluid inlet of the cleaner body 2. The main body connection port 12 fluidly connects the pipe portion 3 and the dust separation device 7.

  The wheel 6 is a large-diameter traveling wheel and supports the cleaner body 2.

  The dust separator 7 separates dust from the dust-containing air flowing into the cleaner body 2, collects and accumulates it, and sends clean air from which dust has been removed to the electric blower 8.

  The dust separation device 7 has a substantially cylindrical shape as a whole. The dust separating device 7 leans against the cleaner main body 2 in such a posture that the bottom portion is inclined forward and the top portion is inclined rearward with respect to the cleaner main body 2 and slightly tilted backward. The dust separator 7 is detachably fixed to the cleaner body 2.

  The electric blower 8 sucks air from the dust separator 7 and generates a negative pressure (suction negative pressure).

  The main body control unit 9 includes a microprocessor (not shown) and a storage device (not shown) for storing various arithmetic programs executed by the microprocessor, parameters, and the like. The storage device stores a plurality of preset operation modes. The plurality of operation modes set in advance correspond to user operations input to the pipe section 3. Different input values (input values of the electric blower 8) are set in the respective operation modes. The main body control unit 9 selectively selects an arbitrary operation mode corresponding to the operation content from a plurality of preset operation modes in accordance with the user's operation input to the tube unit 3, and stores the operation unit. The operation of the electric blower 8 is controlled according to the read operation mode.

  The power cord 11 supplies power to the cleaner body 2 from a wiring plug connector (not shown, so-called outlet). A plug 14 is provided at the free end of the power cord 11.

  The pipe part 3 sucks dust-containing air from the surface to be cleaned by the negative pressure acting from the cleaner body 2 and guides it to the cleaner body 2. The pipe section 3 is fluidly connected to the connection pipe 19 as a joint that is detachably connected to the cleaner body 2, the dust collection hose 21 that is fluidly connected to the connection pipe 19, and the dust collection hose 21. A hand operating tube 22, a gripping part 23 projecting from the hand operating tube 22, an operating part 24 provided on the gripping part 23, an extension tube 25 detachably connected to the hand operating tube 22, and an extension tube 25 And a suction port body 26 that is detachably connected.

  The connection pipe 19 is a joint that is detachable from the main body connection port 12, and is fluidly connected to the dust separator 7 through the main body connection port 12.

  The dust collection hose 21 is a long and flexible substantially cylindrical hose. One end of the dust collection hose 21 (here, the rear end) is fluidly connected to the connection pipe 19. The dust collection hose 21 is fluidly connected to the dust separation device 7 through the connection pipe 19.

  The hand operation tube 22 relays the dust collection hose 21 and the extension tube 25. One end portion (here, the rear end portion) of the hand operation tube 22 is fluidly connected to the other end portion (here, the front end portion) of the dust collecting hose 21. The hand operating tube 22 is fluidly connected to the dust separating device 7 through the dust collecting hose 21 and the connecting tube 19 sequentially.

  The grip portion 23 is a portion that can be gripped by the user's hand in order to operate the vacuum cleaner 1. The grip portion 23 protrudes from the hand operation tube 22 in an appropriate shape that can be easily gripped by the user's hand.

  The operation unit 24 includes a switch associated with each operation mode. Specifically, the operation unit 24 includes a stop switch 24 a associated with an operation stop operation of the electric blower 8 and an activation switch 24 b associated with an operation start operation of the electric blower 8. The stop switch 24 a and the start switch 24 b are electrically connected to the main body control unit 9. The user of the vacuum cleaner 1 can alternatively select the operation mode of the electric blower 8 by operating the operation unit 24. The start switch 24 b also functions as an operation mode selection switch during operation of the electric blower 8. In this case, every time the operation signal is received from the start switch 24b, the main body control unit 9 switches the operation mode in the order of strong → medium → weak → strong →. Note that the operation unit 24 may individually include a weak operation switch (not shown), a medium operation switch (not shown), and a strong operation switch (not shown) instead of the start switch 24b.

  An extension tube 25 having a telescopic structure in which a plurality of cylindrical bodies are overlapped is an elongate and substantially cylindrical tube that can be expanded and contracted. One end portion (here, the rear end portion) of the extension tube 25 is provided with a joint structure that is detachable from the other end portion (here, the front end portion) of the hand operation tube 22. The extension pipe 25 is fluidly connected to the dust separation device 7 through the hand operation pipe 22, the dust collection hose 21 and the connection pipe 19.

  The suction port body 26 can run or slide on a surface to be cleaned such as a wooden floor or a carpet, and has a suction port 28 on the bottom surface facing the surface to be cleaned in the running state or the sliding state. In addition, the suction port body 26 includes a driven body 29 disposed in the suction port 28, for example, a rotatable rotary cleaning body, and an electric motor 31 that drives the driven body 29. One end portion (here, the rear end portion) of the suction port body 26 is provided with a joint structure that is detachable from the other end portion (here, the front end portion) of the extension pipe 25. The suction port body 26 is fluidly connected to the dust separator 7 through the extension pipe 25, the hand operation pipe 22, the dust collection hose 21, and the connection pipe 19. That is, the suction port body 26, the extension tube 25, the hand operation tube 22, the dust collection hose 21, the connection tube 19, and the dust separation device 7 are suction air passages that lead from the electric blower 8 to the suction port 28.

  The electric vacuum cleaner 1 starts the electric blower 8 when accepting a user operation on the start switch 24b. For example, when the vacuum cleaner 1 receives an input with the start switch 24b while the electric blower 8 is stopped, the electric vacuum blower 1 is first operated in the strong operation mode, and when the input is received again with the start switch 24b, the electric vacuum cleaner 1 is electrically driven. When the blower 8 is operated in the middle operation mode and an input is received by the start switch 24b three times, the electric blower 8 is operated in the weak operation mode, and the same is repeated thereafter. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes set in advance, and the input value to the electric blower 8 is small in the order of the strong operation mode, the medium operation mode, and the weak operation mode. The started electric blower 8 exhausts air from the dust separation device 7 to make the inside thereof a negative pressure (suction negative pressure).

  The negative pressure of the dust separator 7 acts on the suction port 28 through the main body connection port 12, the connection tube 19, the dust collection hose 21, the hand operation tube 22, the extension tube 25, and the suction port body 26 in order. The vacuum cleaner 1 cleans the surface to be cleaned by sucking dust on the surface to be cleaned together with air by the negative pressure applied to the suction port 28. The dust separating device 7 separates and accumulates dust from the dust-containing air sucked into the electric vacuum cleaner 1, and sends clean air after separating the dust to the electric blower 8. The electric blower 8 exhausts the air sucked from the dust separator 7 to the outside of the cleaner body 2.

  The suction port body 26 will be further described in detail.

  FIG. 2 is a perspective view of the top side of the suction port body according to the embodiment of the present invention.

  FIG. 3 is a plan view of the suction port body according to the embodiment of the present invention.

  FIG. 4 is a cross-sectional view of the suction port body according to the embodiment of the present invention.

  FIG. 5 is a plan view of the suction port body according to the embodiment of the present invention, with the upper case and the upper cover removed.

  As shown in FIGS. 2 to 5, the suction port body 26 according to the present embodiment includes a flat box-shaped suction port body 32 that is short in the front-rear direction, which is the traveling direction, and wide in the left-right direction, and the rear portion of the suction port body 32. And a connecting pipe portion 33 as a pipe line provided in the center.

  Here, the forward direction (indicated by solid arrow F in FIG. 2) of the suction port body 26 is the front, and the opposite direction is the rear.

  The suction port body 32 has a lower case 35 having a suction port 28 on the bottom surface, an upper case 36 that covers the rear half of the lower case 35 from above, and a front half of the lower case 35 that covers the upper case 36 from above. And an upper cover 37.

  The lower case 35 divides a lower half portion 38 a of a suction chamber 38 having a suction port 28 on the bottom surface, and a lower half portion 39 a of an electric motor chamber 39 adjacent to the suction chamber 38.

  The suction chamber 38 is opened to the front surface in addition to the bottom surface, that is, the suction port 28. The opening on the front side of the suction chamber 38 is referred to as a front suction port 41. The bottom suction port 28 and the front suction port 41 are continuous. That is, the suction chamber 38 is opened from the bottom to the front.

  The suction chamber 38 is in the front half of the suction port body 32 and extends to the left and right. The suction chamber 38 is fluidly connected to the connecting pipe portion 33. That is, the suction chamber 38 is fluidly connected to the cleaner body 2 through the extension pipe 25.

  The electric motor chamber 39 is in the rear half of the suction port body 32 and is adjacent to the suction chamber 38 and the connecting pipe portion 33.

  By the way, in the latter half of the suction port body 32, there are a pair of portions adjacent to the suction chamber 38 and the connecting pipe portion 33 on the left and right sides of the suction port body 32, and one of them (here, the left side) has an electric motor chamber. 39 is partitioned, and the control unit chamber 42 is partitioned on the other side (here, on the right side). The control unit chamber 42 accommodates an electric motor control unit 40 that controls the driving of the electric motor 31.

  The connecting pipe portion 33 is a joint that can be attached to and detached from the extension pipe 25 of the vacuum cleaner 1, and also serves as a universal joint that connects the suction port body 32 to the extension pipe 25 so as to be swingable in the vertical direction and to be rotatable. ing. The connecting pipe portion 33 is adjacent to the motor chamber 39 and is connected to the suction chamber 38 to apply a negative pressure to the suction chamber 38. The connection pipe part 33 includes a fixed pipe 43 connected to the suction chamber 38 and a universal joint part 45 that rotates and swings with respect to the fixed pipe 43.

  The driven body 29 is disposed in the suction chamber 38, and a part of the driven body 29 protrudes outside the suction port 28. The driven body 29 is a rotary cleaning body, for example, and is rotatably supported by the suction inlet body 32 at the left and right ends. The driven body 29 includes a rotating shaft 47 extending across the suction chamber 38, a plurality of cleaning bodies 48 provided around the rotating shaft 47 and extending spirally over the entire width of the suction chamber 38, It has. The plurality of cleaning bodies 48 are made of soft resin blades and belt-like brush hairs singly or alternately.

  In addition to the rotary cleaning body, the driven body 29 is a reciprocating cleaning body that reciprocates in the normal direction of the bottom surface of the suction port main body 32 and knocks out dust from a soft object to be cleaned such as a futon. There may be. Further, the driven body 29 may be a driving wheel that assists the traveling of the suction port body 26.

  The electric motor 31 is disposed in the electric motor chamber 39 and generates the driving force of the driven body 29. The electric motor 31 is housed in the electric motor chamber 39 with the output shaft directed in the width direction of the suction port body 32. The protruding end of the output shaft of the electric motor 31 is close to the left or right end (here, the left side) of the suction port body 32, and is connected to the driven body 29 via the transmission mechanism 53 including the pulley 51 and the belt 52. Transmit power.

  The upper case 36 is combined with the lower case 35 to close the upper half 39b of the motor chamber 39 and the upper half (not shown) of the control section chamber 42.

  The upper case 36 is spanned between the electric motor chamber 39 and the control unit chamber 42, and holds the fixed pipe 43 of the connecting pipe part 33 between the lower case 35.

  The upper cover 37 is combined with the lower case 35 to close the upper half 38b of the suction chamber 38. The upper cover 37 includes a top plate portion 55 corresponding to the ceiling wall of the suction chamber 38, and a front cover portion 56 that hangs down from the front edge of the top plate portion 55 and closes the front suction port 41 of the suction chamber 38. .

  The upper end edge of the front cover part 56 is supported by the front edge part of the top plate part 55 via a hinge mechanism (not shown). The hinge mechanism supports the front cover portion 56 so as to be swingable in the front-rear direction of the front suction port 41. The front cover part 56 is pushed out to the front end side of the swing range by, for example, a torsion spring. When the front surface of the suction port body 26 is pressed against the wall, the front cover portion 56 swings backward, that is, swings in a direction approaching the driven body 29 and approaches the floor surface. As a result, the suction port body 26 restricts the opening area of the front suction port 41 and increases the flow velocity of the air, thereby sucking up dust at the wall more reliably.

  By the way, since the electric motor 31 generates heat as it is driven, it is preferable to cool the electric motor 31 by circulating air into the electric motor chamber 39.

  Therefore, the suction port body 32 is connected to the electric motor chamber 39, the filter body is connected to the non-installed intake port 61, and the suction chamber 38 or the connecting pipe portion 33, and the filter body 62 is installed or not installed to the exhaust port 63. And have.

  Specifically, the intake port 61 is a simple hole that does not have a filter body, and is provided in the upper case 36 or the lower case 35 and penetrates the wall surface inward and outward.

  The air inlet 61 is an opening that is connected to the electric motor chamber 39 and has no filter. The air inlet 61 opens in the wall surface 65 of the upper case 36 or the lower case 35 facing the upper cover 37 and is connected to the electric motor chamber 39 through a gap 66 between the upper cover 37 and the upper case 36 or the lower case 35 (see FIG. 4). Note that the suction port body 26 according to the present embodiment has a pair of wall surfaces facing each other on the upper cover 37 and the upper case 36, and thus the intake port 61 is disposed on the upper case 36 side (FIG. 4). ) Depending on the positional relationship between the mating surface of the upper cover 37 and the lower case 35 and the mating surface of the upper case 36 and the lower case 35 (the vertical relationship of the height position), the upper cover 37 and the lower case 35 face each other. It is also possible to configure a pair of wall surfaces. In this case, the air inlet 61 may be arranged on the lower case 35 side.

  A gap 66 between the upper cover 37 and the upper case 36 or the lower case 35 is cut off from the suction chamber 38. That is, there is no positive air flow between the gap 66 and the suction chamber 38. The air flowing into the intake port 61 is exclusively air flowing into the gap 66 from the upper side of the intake port body 32.

  The exhaust port 63 is a simple hole having no filter body or a hole provided with the filter body 62 and is provided in the upper case 36 or the lower case 35 and penetrates the wall surface inward and outward.

  Further, the exhaust port 63 is connected to the suction chamber 38, and the negative pressure acting on the suction chamber 38 causes the electric motor chamber 39 to be negative pressure so that outside air flows into the electric motor chamber 39 from the intake port 61. That is, the exhaust port 63 is formed on the wall of the lower case 35 that separates the lower half 38a of the suction chamber 38 and the lower half 39a of the motor chamber 39, or the upper half 39b of the motor chamber 39 and the upper half of the suction chamber 38. The motor chamber 39 is fluidly connected to the suction chamber 38 through both the walls of the upper case 36 and the upper cover 37 that separate the space 38b.

  The exhaust port 63 is disposed at any position of the suction port body 32 as long as negative pressure is applied to the motor chamber 39 and the suction chamber 38 side of the output shaft of the motor 31. May be. For example, the exhaust port 63 may be disposed not only at a location connecting the electric motor chamber 39 and the suction chamber 38 but also at a location connecting the electric motor chamber 39 and the fixed pipe 43 of the connecting pipe portion 33.

  The intake port 61 and the exhaust port 63 are arranged on a straight line substantially parallel to the output shaft of the electric motor 31.

  Specifically, in the width direction of the suction port body 32, the suction port 61 is a gap 66 between the upper cover 37 and the upper case 36 or the lower case 35, and one end (here, , The exhaust port 63 is disposed at a location close to the connecting pipe portion 33 connected to the central portion of the suction chamber 38. In addition, in the height direction of the suction port body 32, the intake port 61 and the exhaust port 63 are arranged at the same height. Due to the arrangement of the air inlet 61 and the air outlet 63, the air flowing through the motor chamber 39 flows in a direction parallel to the output shaft of the motor 31 and passes through the side of the body portion 67 of the motor 31. While cooling the electric motor 31, the flow of air across the body portion 67 of the electric motor 31 is suppressed. Such a flow of air prevents the entry of the filter 31 into the electric motor 31 even if dust enters the electric motor chamber 39 through the gap 66 because the air inlet 61 is not provided with a filter body.

  On the other hand, since air flows from the motor chamber 39 side to the suction chamber 38 side at the exhaust port 63, it is unlikely that dust will enter the motor chamber 39 side from the suction chamber 38 side through the exhaust port 63. You may or may not have. Rather, the exhaust port 63 without the filter body makes it easy to discharge the dust to the suction chamber 38 even if dust flows in from the intake port 61 side.

  The intake port 61 and the exhaust port 63 are preferably arranged so as to sandwich the electric motor 31 therebetween.

  Further, the suction port body 32 has a second intake port 69 that is connected to the electric motor chamber 39 from a place other than the gap 66 and in which the filter body 68 is installed.

  Specifically, the second intake port 69 is disposed on the back surface of the intake port body 32. The second air inlet 69 may be disposed on the outer surface (or design surface) of the air inlet main body 32 so that the upstream air passage cross-sectional area is not limited like the gap 66 in the air inlet 61. preferable.

  The second air inlet 69 is a hole in which the filter body 68 is provided. The second air inlet 69 is provided in the upper case 36 or the lower case 35 and penetrates the wall surface inward and outward. The second air inlet 69 has higher air permeability including the filter body 68 than the air inlet 61. The air permeability of the air inlet 61 is evaluated including the pressure loss in the gap 66 between the upper cover 37 and the upper case 36 or the lower case 35. The air permeability of the second air inlet 69 is evaluated including the pressure loss of the filter body 68.

  Note that each of the air inlet 61 and the second air inlet 69 may be a single hole or may include a plurality of holes. However, the opening diameters of the air inlet 61 and the second air inlet 69 are not so small as to capture dust like the filter body 68. In particular, the opening diameter of the air inlet 61 is at least dust passing through the gap 66. It is preferable that it can pass.

  Further, there may be a plurality of exhaust ports 63 like the intake ports 61 and the second intake ports 69. In the case where the suction port body 32 has a plurality of exhaust ports 63, at least one of the plurality of exhaust ports 63 includes a simple hole that does not have a filter body, and the filter body 68 is provided in at least one of the holes. It is preferable to contain.

  The suction port body 26 according to the present embodiment circulates air as cooling air to the motor chamber 39 in order to cool the motor 31. Cooling air flowing through the motor chamber 39 flows from at least one of the intake port 61 and the second intake port 69 (solid arrows f1, f2 in FIG. 5), flows out from the exhaust port 63, and flows into the suction chamber 38 or the connecting pipe portion 33. Sucked into.

  Here, attention is focused on the air sucked into the suction chamber 38. Since the second air intake port 69 has higher air permeability than the air intake port 61, the cooling air is sucked exclusively from the second air intake port 69 (solid arrow f2 in FIG. 5). However, since the second intake port 69 has the filter body 68, if the filter body 68 is clogged, the flow rate of the cooling air may be insufficient.

  Therefore, the suction port body 26 according to the present embodiment ensures the flow of air in the motor chamber 39, that is, cooling air (solid arrow f1 in FIG. 5) even if the second intake port 69 is clogged. In addition, an air inlet 61 is provided. Since the air inlet 61 is not provided with a filter body, at least air passing through the gap 66 flows into the electric motor chamber 39 and cools the electric motor 31. At this time, compared with a state in which the second air intake port 69 is healthy, that is, a state where there is no clogging due to dust or the like, although the cooling air flow rate is reduced, the cooling of the electric motor 31 is helped rather than no flow at all. , Making it easier to ensure its soundness.

  Next, the other example of the suction inlet 26 of the vacuum cleaner 1 which concerns on this embodiment is demonstrated. Note that in the suction port body 26A described in another example, the same components as those of the suction port body 26 are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 6 is another example of the suction port body according to the embodiment of the present invention, and is a plan view with the upper case and the upper cover removed.

  As shown in FIG. 6, the suction port body 26 </ b> A according to the present embodiment includes an intake port 61 </ b> A that is connected to the electric motor chamber 39 and has no filter body.

  Specifically, the intake port 61A is a simple hole that does not have a filter body, and is provided in the upper case 36 or the lower case 35 and penetrates the wall surface inward and outward. The intake port 61A is provided with a leak valve 71 that introduces outside air into the motor chamber 39 when the negative pressure in the motor chamber 39 increases.

  The leak valve 71 includes a valve body 72, a valve body 73 that is disposed in the valve body 72 and that acts on a differential pressure between the negative pressure on the motor chamber 39 side and the atmospheric pressure outside the suction port body 32, and the valve body 73. And an elastic body 75 that supports the negative pressure on the electric motor chamber 39 side.

  The valve box 72 is integrally fixed to the suction port body 32, specifically, the lower case 35. The inside of the valve box 72 is connected to the electric motor chamber 39 and is open to the atmosphere outside the suction port body 32. A valve seat member 76 is provided in the valve box 72 so as to be airtight between the valve box 72 and the outside of the suction port body 32 in conformity with the valve body 73.

  The valve body 73 is accommodated in the valve box 72 so as to be movable. The valve box 72 is pressed against the valve seat member 76 by an elastic body 75.

  The elastic body 75 is, for example, a coil spring. The elastic body 75 presses the valve body 73 against the negative pressure acting in the valve box 72 from the electric motor chamber 39 to prevent outside air from flowing into the electric motor chamber 39, while the negative pressure on the electric motor chamber 39 side. When the pressure difference between the pressure and the atmospheric pressure outside the suction port body 32 exceeds a predetermined threshold value, the valve body 73 cannot be pressed against the valve seat member 76 and the outside air is allowed to flow into the motor chamber 39. .

  The leak valve 71 includes a notification unit 77 that notifies that the leak valve 71 is opened. The notification unit 77 closes the leak valve 71 together with the valve seat member 76, and emits a sound like a whistle when the valve body 73 floats up from the valve seat member 76 and air flows.

  The suction port body 26 </ b> A according to the present embodiment distributes air as cooling air to the motor chamber 39 in order to cool the motor 31. Cooling air flowing in the motor chamber 39 flows from at least one of the intake port 61A and the second intake port 69, flows out from the exhaust port 63, and is sucked into the suction chamber 38 or the connecting pipe portion 33.

  Here, attention is focused on the air sucked into the suction chamber 38. If the negative pressure in the motor chamber 39 does not exceed a predetermined threshold value, the intake port 61A is closed by the leak valve 71, and the cooling air is sucked exclusively from the second intake port 69. However, since the second intake port 69 has the filter body 68, if the filter body 68 is clogged, the flow rate of the cooling air may be insufficient.

  Therefore, the suction port body 26A according to the present embodiment includes the suction port 61A in order to ensure the flow of air in the motor chamber 39, that is, the cooling air, even if the second suction port 69 is clogged. . Since the intake port 61A is provided with the leak valve 71, when the second intake port 69 is clogged and the negative pressure in the motor chamber 39 increases, the leak valve 71 opens and air flows into the motor chamber 39, The electric motor 31 is cooled.

  Therefore, the vacuum cleaner 1 and the suction port body 26, 26A according to the present embodiment are connected to the suction port 61 where the filter body is not installed and the suction chamber 38 or the connecting pipe portion 33, which are connected to the electric motor chamber 39, and Since the filter body 62 has the exhaust port 63 installed or not installed, the cooling air in the motor chamber 39 can always be secured, the temperature rise of the motor 31 can be reduced, and the soundness can be maintained.

  Further, the vacuum cleaner 1 and the suction port bodies 26, 26 </ b> A according to the present embodiment open to the wall surface of the upper case 36 or the lower case 35 facing the upper cover 37, and the upper cover 37 and the upper case 36 or the lower case 35. The suction port 61 connected to the motor chamber 39 from the gap 66 is prevented from entering dust larger than the gap 66 into the suction port 61 without the filter body, and as a result, foreign matter enters the motor 31 and the Failure can be prevented.

  Furthermore, since the vacuum cleaner 1 and the suction port body 26, 26A according to the present embodiment have the second intake port 69 that is connected to the electric motor chamber 39 from a place other than the gap 66 and in which the filter body 68 is installed, When the body 68 is not clogged, a larger amount of cooling air can be poured into the motor chamber 39 to further reduce the temperature rise of the motor 31.

  Furthermore, in the vacuum cleaner 1 and the suction port bodies 26 and 26A according to the present embodiment, the air permeability of the second air inlet 69 including the filter body 68 is higher than that of the air inlet 61. Therefore, the filter body 68 is clogged. If not, a large amount of cooling air can be poured while preventing dust from flowing into the motor chamber 39.

  Further, in the vacuum cleaner 1 and the suction port bodies 26, 26 </ b> A according to the present embodiment, the intake port 61 and the exhaust port 63 are arranged on a straight line substantially parallel to the output shaft of the electric motor 31. The electric motor 31 can be cooled while preventing cooling air from the intake port 61 that may contain dust from flowing into the body portion 67 of the electric motor 31.

  Furthermore, the vacuum cleaner 1 and the suction port body 26 </ b> A according to the present embodiment include a leak valve 71 that introduces outside air into the motor chamber 39 when the negative pressure in the motor chamber 39 increases, thereby cooling air to the motor chamber 39. The cooling air of the electric motor 31 can be poured through the leak valve 71 at an appropriate time that is assumed to be insufficient.

  Furthermore, the vacuum cleaner 1 and the suction port body 26A according to the present embodiment include the notification unit 77 that notifies that the leak valve 71 is opened, so that the cooling air to the motor chamber 31 is lower than normal. For example, the second intake port 69 can be prompted to be cleaned.

  Therefore, according to the vacuum cleaner 1 and the suction port bodies 26 and 26A according to the present embodiment, it is possible to prevent the intrusion of foreign matter and dust around the electric motor 31 as much as possible while ensuring the circulation of the cooling air of the electric motor 31. it can.

  The vacuum cleaner 1 according to the embodiment of the present invention is not limited to the canister type vacuum cleaner 1, and may be an upright type, a stick type, a handy type, or an autonomous type vacuum cleaner 1.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 2 Vacuum cleaner main body 3 Pipe part 5 Main body case 6 Wheel 7 Dust separator 8 Electric blower 9 Main body control part 11 Power supply cord 12 Main body connection port 14 Plug 19 Connection pipe 21 Dust collection hose 22 Hand operation pipe 23 Grip part 24 Operation part 24a Stop switch 24b Start switch 25 Extension pipes 26, 26A Suction port body 28 Suction port 29 Driven body 31 Motor 32 Suction port body 33 Connecting pipe part 35 Lower case 36 Upper case 37 Upper cover 38 Suction chamber 38a Lower half portion 38b Upper half portion 39 Motor chamber 39a Lower half portion 39b Upper half portion 40 Motor control portion 41 Front suction port 42 Control portion chamber 43 Fixed pipe 45 Universal joint portion 47 Rotating shaft 48 Cleaning body 51 Pulley 52 Belt 53 Transmission mechanism 55 Top plate part 56 Front cover part 61, 61A Intake port 62 Filter body 63 Exhaust port 65 Wall surface 66 Clearance 67 Body part 68 Filter Body 69 second inlet 71 leak valve 72 valve body 73 valve body 75 the elastic body 76 valve seat member 77 notification unit

Claims (9)

A lower case defining a lower half of a suction chamber having a suction port on a bottom surface, and a lower half of an electric motor chamber adjacent to the suction chamber;
An upper case that is combined with the lower case and closes the upper half of the motor room;
An upper cover adjacent to the upper case and combined with the lower case to close the upper half of the suction chamber;
A conduit connected to the suction chamber to apply a negative pressure to the suction chamber;
A driven body disposed in the suction chamber;
An electric motor disposed in the electric motor chamber to generate a driving force of the driven body,
The upper case or the lower case is connected to the electric motor room, and the filter body has a non-installed air inlet,
The upper case or the lower case is a suction port body that is connected to the suction chamber or the pipe line and has an exhaust port in which a filter is installed or not installed. The said air inlet opens to the wall surface of the said upper case or the said lower case facing the said upper cover, and is connected to the said motor room from the clearance gap between the said upper cover and the said upper case, or the said lower case. Suction port body. The suction port body according to claim 1, wherein the intake port is provided with a leak valve that introduces outside air into the motor chamber when a negative pressure in the motor chamber increases. The suction port body according to claim 3, further comprising a notification unit that notifies that the leak valve is opened. The suction port body according to claim 2, wherein the upper cover or the lower case has a second suction port that is connected to the electric motor chamber from a portion other than the gap and in which a filter body is installed. The suction port body according to claim 5, wherein the second air inlet port has higher air permeability including the filter body than the air inlet port. 4. The suction port body according to claim 3, wherein the upper cover or the lower case has a second suction port that is connected to the electric motor chamber and in which a filter body is installed. The suction port body according to any one of claims 1 to 7, wherein the intake port and the exhaust port are arranged on a straight line substantially parallel to an output shaft of the electric motor. The vacuum cleaner body,
An electric blower that is housed in the vacuum cleaner body and generates negative pressure;
A vacuum cleaner provided with the suction inlet of any one of Claim 1 to 8 which sucks in air with the negative pressure which the said electric blower generates.

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