JP4760462B2 - Blower - Google Patents

Description

  The present invention forms a cover member formed with a suction hole, a suction means for sucking air through the suction hole, and a conduction path for storing the suction means and leading the air sucked by the suction means to the outside. The present invention relates to a blower device having a main body case.

A general building is provided with a blower for indoor ventilation or the like. In a general air blower, a multi-blade fan such as a sirocco fan is often used as an absorbing means for absorbing air. The sirocco fan has a structure in which air is sucked in from the rotation center to the circumferential direction by rotating a disk-shaped fan having a plurality of blades disposed on the peripheral edge. Since the blower using a sirocco fan can reduce the thickness (height) of equipment due to its structure, it has a feature that it is easy to design the apparatus main body in a compact manner. (For example, refer to Patent Document 1).
JP 2004-340407 A (page 4-6, FIG. 1)

  However, a blower using a sirocco fan has a feature that noise is likely to be generated in the vicinity of a suction hole formed in a fan cover member such as a fan cover or a fan case. For this reason, in order to reduce the noise in the vicinity of the suction hole, a method of using a bell mouth structure in which the peripheral edge of the suction hole is curved toward the sirocco fan side is often used.

  For example, when an obstacle or the like is attached (exists) near the suction hole, the airflow passing through the suction hole may be disturbed by the obstacle or the like. When turbulence occurs in the airflow, the turbulent air flow collides with the blades of the sirocco fan, causing air vortices and separation inside the fan, which may generate noise.

  For this reason, the vortex and separation inside the fan are reduced by smoothly guiding the sucked air to the sirocco fan by the curved surface of the peripheral portion of the suction hole (hereinafter referred to as the bell mouth portion) having a bell mouth structure. In order to reduce noise.

  Therefore, it is preferable to guide the air flow more smoothly by increasing the curvature of the bell mouth portion as much as possible. However, if the curvature is increased, a space is easily formed on the back side of the bell mouth portion, and the space enters the space. However, there was a problem that the air vortex might collide with the fan wing and generate a rustling sound.

  The present invention has been made in view of the above problems, and is a blower capable of suppressing the generation of noise at the suction hole peripheral portion while sufficiently ensuring the curvature of the bell mouth structure at the peripheral portion of the suction hole. It is an issue to provide.

  In order to solve the above-mentioned problems, an air blower according to the present invention includes an inhalation unit that inhales air, a cover member that is formed so that an inhalation hole for introducing the air faces the inhalation unit, and the inhalation unit includes: And a main body case formed with a conduction path for guiding the air sucked by the suction means to the outside, and the peripheral portion of the suction hole is formed by a bell mouth structure having a curved convex portion from the surface, A partition member for partitioning a space formed between the suction means and the bell mouth structure is provided on the back surface of the curved convex portion.

  The partition member may be a rib erected on the back surface of the curved convex portion in the radial direction of the suction hole.

  Furthermore, the partition member may be a rib erected on the back surface of the curved convex portion along the circumferential direction of the peripheral edge portion.

  Further, the partition member may be formed at a position on the back surface of the curved convex portion and closer to the outlet side of the conduction path.

  Note that the position of the back surface of the curved convex portion and closer to the outlet side of the conduction path refers to the tongue in a state viewed from the back side with respect to the front end portion of the tongue-like wall portion that can form the rear end portion of the conduction path. The back surface of the peripheral edge from the vicinity of the tip position of the wall-like wall portion to about 180 degrees counterclockwise is meant.

  Furthermore, the suction means may be a multiblade fan whose rotating shaft faces the suction hole.

  In the air blower according to the present invention, since the peripheral portion of the suction hole is formed by a bell mouth structure having a curved convex portion from the surface, air can be easily sucked by the suction means along the curved surface of the curved convex portion. It is possible to reduce the generation of noise.

  In the air blower according to the present invention, since the partition member is provided on the back surface of the curved convex portion, the air guided to the suction means along the curved surface of the curved convex portion is the back surface of the curved convex portion. It can prevent flowing into the space formed between the suction means. For this reason, the air guided to the suction means along the curved surface of the peripheral edge of the suction hole is smoothly introduced into the suction means without causing air vortices on the back surface of the curved convex portion. It is possible to suppress the generation of noise.

  In particular, it is possible to prevent the generation of vortices that flow around the back surface space of the peripheral portion in the circumferential direction by providing a rib on the back surface of the curved convex portion in the radial direction of the suction hole as the partition member. Therefore, noise generation can be further reduced.

  In addition, as a partition member, ribs are erected on the back surface of the curved convex portion along the circumferential direction of the peripheral edge portion, thereby preventing generation of vortices that flow in the cross-sectional direction with respect to the back space of the curved convex portion. Therefore, noise generation can be further reduced.

  Further, when the partition member is formed on the back surface of the curved convex portion and near the outlet of the conduction path, the partition member is formed in a portion where air is merged and the flow velocity becomes fastest and is likely to be disturbed. Therefore, it is possible to more effectively suppress noise.

  Further, when a multi-blade fan is used as the suction means, the blade tip of the fan easily collides with the vortex of the air that has entered the space on the back surface and easily generates a bass sound. By using it, it is possible to achieve a remarkable noise reduction effect.

  Hereinafter, the case where the air conditioner according to the present invention is used as a bathroom air conditioner will be described.

  FIG. 1 is a perspective view showing a bathroom air conditioner, and FIG. 2 is a side sectional view showing the bathroom air conditioner. The bathroom air conditioner 1 includes a fan unit (air blowing means) 2, a main body case 3, a damper 4, a fan cover (cover member) 5, a heater 6, and a front panel 7.

  The fan unit 2 includes a fan motor 8 and a sirocco fan 9. The sirocco fan 9 has a plurality of blades 9b disposed on the periphery of a disk-shaped main plate 9a, and a rotating shaft 8a of a fan motor 8 is fixed to the center of the main plate 9a. When a driving force is applied to the rotating shaft 8a by driving the fan motor 8, the sirocco fan 9 rotates together with the rotating shaft 8a, and the air in front of the main plate 9a is moved to the side of the sirocco fan 9 via the blades 9b of the sirocco fan 9. And inhale.

  The main body case 3 is a box having an opening opened downward, and a fan storage portion 12 for installing the fan unit 2 and a damper storage portion 13 for storing the damper 4 are formed. .

  The fan storage portion 12 is a substantially cylindrical recess whose diameter is larger than the diameter of the sirocco fan 9. The fan motor 8 is installed on the upper surface of the main body case 3, and the opening is formed at the center of the fan storage portion 12. By storing the sirocco fan 9 in the fan storage portion 12 with the rotating shaft 8a protruding, the center of the main plate 9a of the sirocco fan 9 is fixed to the tip of the rotating shaft 8a.

  Between the side wall surface 12 b of the fan housing portion 12 and the outer peripheral side 9 c of the sirocco fan 9, a conduction path 20 for guiding the sucked air to the damper housing portion 13 is formed.

  The damper storage portion 13 is a recess capable of rotatably storing the damper 4, and a heater 6 described later is installed below the damper storage portion 13. Further, an exhaust port 16 is provided on the side wall of the damper storage portion 13 for discharging the air guided to the damper storage portion 13 to the outside of the bathroom.

  The damper 4 has a substantially rectangular shape in a plan view, and has a gently curved shape with a central convex portion in a side view as shown in FIG. A shaft 4 a is formed at the lower end of the damper 4, and both ends of the shaft 4 a are pivotally supported on the side wall of the damper storage portion 13. Further, a rib 4b is formed on the lower surface of the damper 4, and a guide hole 4c for guiding the protruding portion 19 of the cam 18 that is rotated according to the operation mode of the bathroom air conditioner 1 is formed on the rib 4b. ing. When the cam 18 rotates, the stop position of the projection 19 changes according to the rotation angle, and the rotation angle of the damper 4 is adjusted.

  As shown in FIGS. 1 and 2, the fan cover 5 is installed so as to cover the lower surface of the main body case 3. The fan cover 5 is formed with a suction hole 5a for guiding air to the center of the sirocco fan 9 and a blowout hole 5b for circulating the air carried to the damper storage part 13 indoors. . The suction hole 5 a is a circular opening formed so as to face the front surface of the main plate 9 a of the sirocco fan 9, and the blowout hole 5 b is a substantially rectangular opening formed so as to face the damper storage portion 13. By installing the fan cover 5 on the lower surface of the main body case 3, the lower surface of the conduction path 20 is constituted by the fan cover 5.

  As shown in FIGS. 3 and 4, the peripheral edge of the suction hole 5a of the fan cover 5 is formed by a bell mouth structure, and the peripheral edge of the opening protrudes toward the bathroom side (surface side) to form a curved convex portion. The end portion thereof is configured by a curved surface 60 that is inclined (curved) toward the sirocco fan 9 (hereinafter, the opening peripheral portion (curved convex portion) of the suction hole 5a having a bell mouth structure is referred to as a bell mouth portion 61). To do).

  As shown in FIG. 4A, the back surface of the bell mouth portion 61 is curved so as to correspond to the curved surface 60 on the front surface side, and an annular space that exhibits a hemispherical cross section by the curved surface 60a on the back surface side. 60b is formed. Further, as shown in FIGS. 4A and 4B, ribs 62 erected in the radial direction of the bell mouth portion 61 are formed in the space 60 b as partition members.

  The rib 62 is located on the back surface of the bell mouth portion 61 and near the outlet of the conduction path 20, specifically, as shown in FIG. 4B, at the boundary between the conduction path 20 and the damper storage part 13. Nine are provided at equal intervals on the back surface of the bell mouth portion 61 from the vicinity of the distal end position of the tongue-like wall portion 64 to the position of about 180 degrees counterclockwise with respect to the tip portion of the tongue-like wall portion 64 to be formed. Yes.

  Further, on the back surface of the bell mouth portion 61, a rib 62 having an equal ring diameter with the bell mouth portion 61 and a semi-annular rib 63 erected along the circumferential direction of the bell mouth portion 61 is connected. It is formed like this. The height of the rib 62 and the rib 63 is the same as the height (depth) of the space 60b on the back surface of the bell mouth portion 61. The thickness of the rib 62 and the rib 63 is 0.5 mm to 3.0 mm. It has become.

  A heater 6 is installed in the blowout hole 5 b of the fan cover 5. As the heater 6, a PTC (Positive Temperature Coefficien) heater is used. The PTC heater has a resistance change characteristic in which the resistance value changes depending on the temperature. When the temperature exceeds a predetermined value (Curie temperature), the resistance value is suddenly increased to suppress the flow of electricity. The structure keeps the temperature within a certain temperature range.

  A front panel 7 is installed on the lower surface of the main body case 3 on which the fan cover 5 is installed. In the front panel 7, a suction port 30 is formed at a position corresponding to the suction hole 5 a of the fan cover 5, and a blower outlet 15 is formed at a position corresponding to the blowout hole 5 b of the fan cover 5. A filter 31 for preventing dust from being sucked is detachably attached to the suction port 30. The bathroom air conditioner 1 is fixed to the ceiling surface 33 so that the main body case 3 protrudes in the direction of the ceiling, and is installed in the bathroom with only the front panel 7 exposed on the ceiling surface 33 of the bathroom.

  Next, the case where the bathroom air conditioner 1 comprised in this way operates is demonstrated.

  When operating the bathroom air conditioner 1, the user selects an operation mode by operating an operation panel 50 (see FIG. 5) installed in a dressing room in the bathroom. Specifically, a heating mode for heating the bathroom, a ventilation mode for ventilating the bathroom, a drying mode for drying clothes by placing a laundry pipe (not shown) in the bathroom as a drying room, and a cool breeze that introduces a cool breeze into the bathroom Select a mode. Further, in a building such as a condominium that needs to be ventilated for 24 hours, the operation in the 24-hour ventilation mode is performed when the operation mode of the bathroom air conditioner 1 is not selected.

  By operating the bathroom air conditioner 1 in the heating mode, the interior of the bathroom can be preheated (so-called preheating), so that the bather (user) can take a comfortable bath without feeling cold at the start of the bathroom. Can be done. In addition, the bather can comfortably take a bath without feeling cold even when washing the body in a washing place by reducing the amount of warm air blown into the bathroom during bathing (so-called bath heating). be able to.

  Moreover, by operating the bathroom air conditioner 1 in the ventilation mode, it becomes possible to install laundry pipes in the bathroom and dry clothes hung in the bathroom.

  Furthermore, by operating the bathroom air conditioner 1 in the ventilation mode, moisture in the bathroom can be positively discharged to the outdoors, so that generation of mold or the like in the bathroom can be suppressed.

  Further, by operating the bathroom air conditioner 1 in the cool breeze mode, the room temperature air can be sent into the bathroom, so that the bathroom air conditioner can be used like a fan in summer and the like.

  In addition, when the operation is performed in the 24-hour ventilation mode, it is possible to efficiently discharge volatile organic compounds such as formaldehyde that may be diffused from the interior material of the building to the outdoors. This 24-hour ventilation function is required to be installed in a building having a living room.

  When the operation mode is selected by the user, the selected operation mode information is transmitted to the control unit 51 installed in the bathroom air conditioner 1, as shown in FIG. The controller 51 controls the rotation angle of the cam 18 by driving the cam driving motor 52 in accordance with the selected operation mode, and adjusts the rotation position of the damper 4 to full open, half open, or full closed. To do. Further, the control unit 51 drives the fan motor 8 of the fan unit 2 to adjust the rotational speed of the sirocco fan 9 to either strong or weak according to the selected operation mode, and also turns the heater 6 on / off. Take control.

  Note that the state in which the rotational position of the damper 4 is fully closed means that the air that flows through the conduction path 20 by rotating the damper 4 to a position that closes the exhaust port 16 is supplied to the outlet 15 as shown in FIG. 2 (refer to the air flow indicated by arrows A to B in FIG. 2), and the fully open state means that the damper 4 is turned to a position where the air outlet 15 is closed as shown in FIG. This means a state in which the air flowing through the conduction path 20 is guided to the exhaust port 16 (see the air flow indicated by arrows A to C in FIG. 6A), and the half-open state means the conduction path. A state in which the damper 4 is rotated to an intermediate position shown in FIG. 6B in order to guide the air flowing through both the blowout port 15 and the exhaust port 16 (an arrow in FIG. 6B). A to arrow B and arrows A to C).

  Next, the operation of the bathroom air conditioner 1 will be described separately for each operation mode.

<In the heating mode>
When the heating mode is set by the user, as shown in FIG. 2, the control unit 41 turns the damper 4 to the fully closed position, sets the rotation speed of the sirocco fan 9 to be strong, and turns the heater 6 on. Turn it on. When the rotation speed of the sirocco fan 9 is set to be strong, the air in the bathroom is sucked into the main body case 3 from the suction port 30 as the sirocco fan 9 rotates.

  When the air in the bathroom is sucked into the main body case 3, the air that has passed through the suction port 30 is sirocco along the curved surface 60 of the bell mouth portion 61 of the suction hole 5a as shown in FIG. Guided to the fan 9.

  When the rib 62 and the rib 63 are not formed on the back surface of the bell mouth portion 61, the air guided to the sirocco fan 9 along the curved surface 60 is indicated by a chain line arrow C shown in FIG. Then, it flows into the space 60b on the back surface side of the bell mouth portion 61 and generates air vortices (vortex in the cross-sectional direction and vortex in the horizontal direction (circumferential direction of the bell mouth portion 61) accompanying the rotation of the sirocco fan 9). This air vortex collided with the lower end portion of the blade 9b of the sirocco fan 9 to generate a rattling sound.

  On the other hand, when the rib 62 and the rib 63 are formed on the back surface of the bell mouth portion 61 as in the bell mouth portion 61 shown in the present embodiment, the sirocco fan 9 is moved along the curved surface 60 of the bell mouth portion 61. The air thus guided is prevented from flowing to the back side of the bell mouth portion 61 by the rib 63, and the generation of vortices as indicated by the arrow C in FIG. 4A is suppressed.

  Further, since the rib mouth portion 61 is formed with the rib mouth portion 61, a swirl (horizontal direction flow) caused by a circumferential flow that can be generated in the space 60b on the back surface side of the bell mouth portion 61 as the sirocco fan 9 rotates. It is also possible to suppress vortices due to flow. For this reason, the air flowing into the sirocco fan 9 from the end of the bell mouth part 61 is guided to the side of the wing 9b of the sirocco fan 9 without generating a vortex in the space 60b on the back surface of the bell mouth part 61. It is led to the conduction path 20 by the fan 9 (see arrow D in FIG. 4A).

  As described above, the air guided to the sirocco fan 9 along the curved surface 60 of the bell mouth portion 61 is smoothly guided to the conduction path 20 without generating an air vortex, so that noise such as a rattling sound is generated. It is possible to introduce air into the apparatus while suppressing the above.

  In addition, since the bell mouth portion 61 is a curved convex portion that is raised from the surface of the fan cover 5 and has a convex shape, it becomes easier to inhale air in the bathroom along the curved surface 60 of the curved convex portion, Furthermore, it is possible to reduce the generation of noise.

  In particular, as shown in FIG. 4A, the rib 62 and the rib 63 are installed on the back surface of the bell mouth portion 61 and at a position closer to the outlet side of the conduction path 20. The position near the outlet of the conduction path 20 is a place where the air introduced by the conduction path 20 merges and is the place where the flow velocity is the fastest, so that the air introduced by the sirocco fan 9 is likely to be disturbed. For this reason, by providing the rib 62 and the rib 63 near the outlet side of the conduction path 20, it is possible to more effectively reduce the generation of noise.

  The sucked air passes between the blades 9 b of the sirocco fan 9 and is guided to the conduction path 20 and then guided to the damper storage portion 13. In the damper storage part 13, since the damper 4 is rotated to the fully closed position, the exhaust port 16 is closed by the damper 4 as shown in FIG. For this reason, the air guided to the damper accommodating portion 13 changes the air flow direction downward along the lower surface 4 e of the damper 4 and flows to the heater 6.

  The air that has flowed to the heater 6 is heated by the heater 6 to be warm air, and then blown out to the bathroom to heat the bathroom.

<Ventilation mode and 24-hour ventilation>
When the ventilation mode is set by the user, the control unit 41 turns the damper 4 to the fully open position and sets the rotation speed of the sirocco fan 9 to be strong as shown in FIG. Set 6 to OFF. When the rotation speed of the sirocco fan 9 is set to be strong, air in the bathroom is sucked into the main body case 3 through the suction port 30 as the sirocco fan 9 rotates.

  When the air in the bathroom is sucked into the main body case 3, the air that has passed through the suction port 30 is sirocco fan along the curved surface 60 of the bell mouth portion of the suction hole 5a as shown in FIG. 9 leads to. At this time, since the rib 63 is formed on the back surface of the bell mouth portion 61, the air guided to the sirocco fan 9 along the curved surface 60 flows to the back surface side of the bell mouth portion 61 by the rib 63. This prevents the generation of vortices.

  Furthermore, since the rib mouth 62 is formed on the bell mouth portion 61, the flow of the horizontal vortex that can be generated around the space 60b of the bell mouth portion 61 as the sirocco fan 9 rotates is also suppressed. be able to. For this reason, the air flowing into the sirocco fan 9 from the end of the bell mouth part 61 is guided to the side of the wing 9b of the sirocco fan 9 without flowing into the back surface of the bell mouth part 61, and is guided through the sirocco fan 9. It is guided to the passage 20 (see arrow D in FIG. 4A).

  In this way, since the air guided to the sirocco fan 9 along the curved surface 60 of the bell mouth portion 61 is smoothly guided to the conduction path 20 without generating an air vortex, generation of noise such as a rattling sound is generated. It is possible to introduce air into the apparatus while suppressing the above.

  In addition, since the bell mouth portion 61 is a curved convex portion that is raised from the surface of the fan cover 5 and has a convex shape, it becomes easier to inhale air in the bathroom along the curved surface 60 of the curved convex portion, Furthermore, it is possible to reduce the generation of noise.

  Furthermore, since the rib 62 and the rib 63 are installed at a portion near the rear outlet of the conduction path 20, it is possible to effectively reduce the generation of noise even in the rear part of the passage of the conduction path 20 where the flow velocity is high. Is possible.

  The air guided to the conduction path 20 through the space between the blades 9 b of the sirocco fan 9 is guided to the damper storage portion 13.

  In the damper storage part 13, since the damper 4 is rotated to the fully open position, as shown in FIG. 6 (a), the tip of the damper 4 abuts on the fan cover 5, and the damper 4 closes the air outlet 15. It will be in the state. For this reason, the air led to the damper housing part 13 flows into the space on the upper surface 4d side of the damper 4 and is discharged from the exhaust port 16 to the outside of the bathroom.

  In addition, when performing ventilation for 24 hours, while the control part 41 rotates the damper 4 to a full open position, the rotational speed of the sirocco fan 9 is set to weak, and the heater 6 is turned off. In the 24-hour ventilation mode, there is a difference that the wind speed of the air introduced into the main body case 3 becomes weak, but air is sucked and discharged through the same route as that in the ventilation mode described above.

<Dry mode and cool breeze mode>
When the user sets the drying mode, the control unit 41 rotates the damper 4 to the half-open position and sets the rotation speed of the sirocco fan 9 to be strong, as shown in FIG. Set 6 to ON. When the rotation speed of the sirocco fan 9 is set to be strong, air in the bathroom is sucked into the main body case 3 through the suction port 30 as the sirocco fan 9 rotates.

  When the air in the bathroom is sucked into the main body case 3, the air that has passed through the suction port 30 is sirocco along the curved surface 60 of the bell mouth portion 61 of the suction hole 5a as shown in FIG. Guided to the fan 9. At this time, since the rib 63 is formed on the back surface of the bell mouth portion 61, the air guided to the sirocco fan 9 along the curved surface 60 flows to the back surface side of the bell mouth portion 61 by the rib 63. This prevents the generation of vortices.

  Furthermore, since the rib mouth 62 is formed in the bell mouth part 61, generation | occurrence | production of the vortex which flows through the space 60b of the bell mouth part 61 in the circumferential direction with rotation of the sirocco fan 9 can be suppressed. For this reason, the air flowing into the sirocco fan 9 from the end of the bell mouth part 61 is guided to the side of the wing 9b of the sirocco fan 9 without flowing into the back surface of the bell mouth part 61, and is guided through the sirocco fan 9. It is guided to the passage 20 (see arrow D in FIG. 4A).

  In this way, since the air guided to the sirocco fan 9 along the curved surface 60 of the bell mouth portion 61 is smoothly guided to the conduction path 20 without generating an air vortex, generation of noise such as a rattling sound is generated. It is possible to introduce air into the apparatus while suppressing the above.

  In addition, since the bell mouth portion 61 is a curved convex portion that is raised from the surface of the fan cover 5 and has a convex shape, it becomes easier to inhale air in the bathroom along the curved surface 60 of the curved convex portion, Furthermore, it is possible to reduce the generation of noise.

  Furthermore, since the rib 62 and the rib 63 are installed at a portion near the rear outlet of the conduction path 20, it is possible to effectively reduce the generation of noise even in the rear part of the passage of the conduction path 20 where the flow velocity is high. Is possible.

  The air guided to the conduction path 20 through the space between the blades 9 b of the sirocco fan 9 is guided to the damper storage portion 13.

  In the damper storage part 13, the damper 4 is rotated to the half-open position, so that the air guided to the damper storage part 13 is split up and down at the tip of the damper 4. The air that has flowed to the upper surface 4d side of the damper 4 is guided toward the exhaust port 16 along the upper surface 4d of the damper 4 as already described in the case of the ventilation mode and the 24-hour ventilation.

  Further, the air flowing toward the lower surface 4e of the damper is guided to the heater 6 along the lower surface 4e of the damper 4 as already described in the heating mode.

  The air flowing to the heater 6 is heated by the heater 6 to be warm air, and then blown out into the bathroom. In this way, the bathroom air conditioner 1 warms the air introduced into the heater 6 and circulates it in the bathroom.

  When the cool air mode is selected by the user, the setting of the rotational position of the damper 4 and the rotational speed of the sirocco fan 9 is the same setting as in the drying mode, except that the heater 6 is set to OFF. For this reason, even when the cool air mode is selected, it is possible to reduce the noise as in the above-described drying mode.

  Thus, in the bathroom air conditioner 1 according to the present invention, since the rib 63 is formed on the back surface of the bell mouth portion 61, the air guided to the sirocco fan 9 along the curved surface 60 of the bell mouth portion 61. Is guided to the sirocco fan 9 by the rib 63 without entering the space behind the bell mouth portion 61. For this reason, it becomes possible to suppress generation | occurrence | production of the vortex in the space 60b of the back surface of the bellmouth part 61. FIG.

  Furthermore, since the rib mouth 62 is formed in the bell mouth portion 61, the generation of vortices flowing around the space 60b on the back surface side of the bell mouth portion 61 in the circumferential direction with the rotation of the sirocco fan 9 is suppressed. be able to.

  Accordingly, the air that flows into the sirocco fan 9 from the end of the bell mouth portion 61 is guided to the side of the wing 9 b of the sirocco fan 9 without flowing into the space 60 b on the back surface of the bell mouth portion 61, and is guided by the sirocco fan 9. It is led to the passage 20. Since the air guided to the sirocco fan 9 along the curved surface 60 of the bell mouth portion 61 is smoothly guided to the conduction path 20 without generating air vortex, it is possible to suppress the generation of noise such as a rustling sound. It becomes possible to introduce air into the apparatus.

  In particular, since the rib 62 and the rib 63 are disposed on the back surface of the bell mouth portion 61 and closer to the outlet side of the conduction path 20, the air is merged and the flow velocity becomes the fastest and is likely to be disturbed. Since ribs are installed, the generation of noise can be reduced more effectively.

  In addition, since the bell mouth portion 61 is a curved convex portion that protrudes from the surface of the fan cover 5 and has a convex shape, it becomes easier to inhale air in the bathroom along the curved surface 60 of the curved convex portion, Furthermore, it is possible to reduce the generation of noise.

  Further, when a multi-blade fan such as the sirocco fan 9 is used as the suction means, the vortex of the air that has entered the space behind the bell mouth portion 61 collides with the end of the fan blade 9b and makes a rattling sound. Since it is easy to generate | occur | produce, it can show a noise reduction effect more notably by using the air blower which concerns on this invention.

  As mentioned above, although embodiment of the bathroom air conditioner 1 was divided and demonstrated for every operation mode, the air conditioner which concerns on this invention is not limited to embodiment mentioned above. It will be apparent to those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above-described embodiment, nine ribs 62 are installed. However, the number of ribs 62 is not limited to nine, and may be less than nine but more than nine. May be. In addition, the ribs 62 and 63 are installed at a position near the rear exit of the conduction path 20, but the ribs 62 and 63 are not limited to this position, and may be formed on the entire back side of the bell mouth portion 61. You may make it form only in another part.

  In the above-described embodiment, an example in which the ribs 62 and 63 are formed as the partition member has been described. However, the partition member is not limited to the rib. For example, a large number of protrusions such as a columnar shape are formed. The partition member may be formed in a lattice shape, or may be formed from another configuration.

  Further, in the above-described embodiment, the thickness of the rib is defined as 0.5 to 1.5, but this thickness is not necessarily limited to this value, and even if the thickness is thinner, it is a thickness. May be.

  In the embodiment, the case where the fan unit 2 in which the sirocco fan 9 is unitized with the fan motor 8 has been described. However, the fan is not necessarily limited to the unitized fan, A motor or the like may be configured separately. Furthermore, in the embodiment, the case where a sirocco fan is used as a fan for blowing air has been described. However, the fan is not necessarily limited to a sirocco fan, and a multi-blade fan such as a radial fan is used. May be.

  In the above embodiment, the air conditioner that performs ventilation (circulation) and exhaust of air using one fan unit has been described. However, both the fan unit for ventilation and the fan unit for exhaust are provided. Even if it is an air conditioner, the same effect can be show | played by applying the structure of the air conditioner which concerns on this invention.

  Furthermore, although the air conditioner for bathroom was demonstrated in embodiment mentioned above, the air blower which concerns on this invention is not limited to the air conditioner for bathrooms, Even if it is an air conditioner used other than a bathroom Good.

It is a perspective view which shows the bathroom air conditioner which concerns on embodiment. It is side sectional drawing which shows the bathroom air conditioner by which the damper was rotated in the fully closed state. It is the top view which showed the fan cover surface of the bathroom air conditioner which concerns on embodiment. (A) is sectional drawing which showed the aa cross section of FIG. 3 from the arrow direction, (b) is the back view which showed the back surface of the fan cover. It is the block diagram which showed the control function of the bathroom air conditioner which concerns on embodiment. It is side sectional drawing which shows the bathroom air conditioner by which the damper was rotated in the fully open state, and the bathroom air conditioner by which the damper was rotated in the half open state.

Explanation of symbols

1 ... Bathroom air conditioner 2 ... Fan unit (suction means, multi-blade fan)
3 ... body case 4 ... damper 4a ... (damper) shaft 4b ... (damper) rib 4c ... (rib) guide hole 4d ... (damper) upper surface 4e ... (damper) lower surface 5 ... fan cover (cover member) )
5a ... suction hole 5b ... blowout hole 6 ... heater 7 ... front panel 8 ... fan motor 8a ... rotating shaft 9 ... sirocco fan 9a ... (sirocco fan) main plate 9b ... (sirocco fan) blade 9c ... (sirocco fan) Peripheral side 12 ... Fan storage part 12b ... Side wall surface 13 (of fan storage part) ... Damper storage part 15 ... Air outlet 16 ... Exhaust port 18 ... Cam 19 ... Projection part 20 (of cam) ... Conduction path 30 ... Suction port ( Inlet)
31 ... Filter 33 ... Ceiling 50 ... Operation panel 51 ... Control unit 52 ... Cam driving motor 60 ... (front side) curved surface 60a ... (back side) curved surface 60b ... space 61 ... bell mouth part (curved convex part)
62, 63 ... ribs (partition members)
64 ... Tongue wall

Claims (4)

Inhalation means for inhaling air;
A cover member formed such that a suction hole for introducing the air faces the suction means;
A main body case in which the suction means is housed and a conduction path for guiding the air sucked by the suction means to the outside is formed;
The peripheral portion of the suction hole is formed by a bell mouth structure having a curved convex portion from the surface,
Wherein the rear surface of the curved convex portion, the partition member that partitions the space formed between the suction means provided et been by the bell mouth structure,
The air blower characterized in that the partition member is a rib erected on the back surface of the curved convex portion toward the radial direction of the suction hole . The blower according to claim 1, wherein the partition member is a rib erected on the back surface of the curved convex portion along a circumferential direction of the peripheral edge portion . The blower according to claim 1 or 2, wherein the partition member is formed on a back surface of the curved convex portion and at a position closer to an outlet side of the conduction path . The blower according to any one of claims 1 to 3, wherein the suction means is a multiblade fan whose rotating shaft faces the suction hole .

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