JP2012242039A - Blowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blowing device solving such a problem that a damper cannot be switched by a stepping motor.SOLUTION: The blowing device 10 includes a body case 20 including: a suction port 25 sucking the indoor air; a discharge port 28 discharging the sucked air to the outside; and a blowing port 26 returning the air sucked from the suction port 25 to the inside of a room. In the body case 20, a blowing fan 40 sucking the air from the suction port 25 and sending the air, and the damper 50 rotated and moved around a shaft 51 to switch a direction of air sent from the blowing fan 40 toward the discharge port 28 or the blowing port 26, are disposed. The blowing device 10 includes the stepping motor rotating and moving the damper 50, and a reduction gear reducing a rotational speed of an output shaft of the stepping motor. The damper 50 is rotated and moved through the reduction gear by the stepping motor.

Description

  The present invention relates to a blower that exhausts or circulates indoor air.

  Conventionally, a ventilator for ventilating and heating a bathroom is known (see Patent Document 1).

  Such a ventilator has a suction port for sucking in air in the bathroom, a blow-out port for blowing air into the bathroom, a heater for warming the air blown out from the blow-out port, an exhaust air passage communicating with the blow-out port, and air from the suction port. And a switching damper that guides the air blown by the blower fan to the blowout port or the exhaust air passage.

  When the bathroom is ventilated, the air sucked from the suction port by the blower fan is guided to the exhaust air passage by the switching damper and exhausted to the outside. When the bathroom is heated, the switching damper is switched so that the air sucked from the suction port is guided to the blow-out port, warmed by the heater, and warm air blows out into the bathroom.

JP 2004-308999 A

  Such switching of the switching damper of the ventilation device is performed by a synchronous motor or a stepping motor.

  By the way, there is a problem that the synchronous motor is expensive, and the stepping motor is cheap but the driving torque is small. Therefore, when the switching damper is fixed by dust or the like at the stop position, the switching damper cannot be switched. There is a problem of end.

  An object of the present invention is to provide a blower device that can prevent a damper from being switched by a stepping motor.

The invention of claim 1 has an intake port for taking in indoor air, an exhaust port for exhausting the intake air to the outside, and a blowout port for returning the air taken in from the intake port to the room A blower that sucks air from the intake port and blows air inside the main body case, and a blowing direction of the air blown from the blower is rotated about an axis to the exhaust port and the blower outlet. A blower provided with a damper for switching,
A stepping motor for rotating the damper;
A reduction gear for reducing the rotation speed of the output shaft of the stepping motor;
The damper is rotated by the stepping motor via the reduction gear.

  According to the present invention, since the damper is switched via the reduction gear, it is possible to prevent the damper from being switched.

It is the perspective view which showed the external appearance of the air conditioner for bathrooms and front panel which concern on this invention. It is a top view of the air conditioner shown in FIG. It is sectional drawing which shows the structure of the air conditioner shown in FIG. It is the perspective view which showed the external appearance of the inner case of the main body case of the air conditioner shown in FIG. 1, and the structure of the drive mechanism. It is a bottom view of the inner case shown in FIG. It is the side view which showed the structure of the drive mechanism shown in FIG. It is sectional drawing which follows the AA line of FIG. (A) Top view of reduction gear, (B) Front view of reduction gear, (C) Side view of reduction gear, (D) Bottom view of reduction gear. It is sectional drawing of the reduction gear shown in FIG. (A) Front view of link member of drive mechanism shown in FIG. 4, (B) Side view of link member, (C) Rear view of link member. It is a secondary sectional view of the link member shown in FIG. It is explanatory drawing which showed the state which attached the reduction gear to the link member with which the side wall of the damper chamber was mounted | worn. (A) The side view which showed the pressing member, (B) The top view of a pressing member. It is the block diagram which showed the structure of the control system of an air conditioner. It is explanatory drawing which showed the rotation position of the reduction gear when a damper is stopped by the position of a cool breeze mode or a drying mode. It is explanatory drawing which showed the rotational position of the reduction gear at the time of detecting the origin position of a damper. It is explanatory drawing which showed the position of the damper at the time of a cool breeze mode or dry mode. It is explanatory drawing which showed the state when a damper is fully closed.

  Hereinafter, an embodiment which is an embodiment of an air conditioner which is one of the air blowers according to the present invention will be described with reference to the drawings.

The air conditioner 10 for a bathroom shown in FIGS. 1 to 3 includes a main body case 20, a blower fan (blower) 40, a damper 50, and a heater that are housed in an opening 14 provided in the ceiling 13 of the bathroom 12 in advance. (Heating means) 60 and a drive mechanism 100 (see FIG. 4) for rotating the damper 50 are provided.
[Body case]
The main body case 20 includes an inner case 21 made of resin and an outer case 30 made of metal that covers the inner case 21.
[Inner case]
The inner case 21 forms a blower fan chamber 22, a blower passage 27, and a damper chamber 23, and the lower surface is opened. As shown in FIG. 5, the air passage 27 has an outer peripheral air passage 27 </ b> A on the outer peripheral side (the outer peripheral side of the blower fan 40) of the blower fan chamber 22 and communication air that communicates between the outer peripheral air passage 27 </ b> A and the damper chamber 23. And a path 27B.

  The outer peripheral air passage 27A is formed by an annular wall portion 21A, a ceiling wall portion 21T and the like shown in FIG. The communication air passage 27B is formed by the side wall portion 21B, the ceiling wall portion 27T, and the like.

  And the ventilation fan chamber 22, the ventilation path 27, and the damper chamber 23 are connected, and the exhaust port 28 is formed in the side wall part 23A of the damper chamber 23 (right side wall part in FIG. 3).

  As shown in FIG. 4, a mounting hole 27Ta for mounting the ion generator 200 (see FIG. 5) is formed in the ceiling wall portion 27 </ b> T of the air passage 27. A mounting portion 23Ta for attaching a circuit board (not shown) is formed on the ceiling wall portion 23T of the damper chamber 23. In FIG. 3, the ceiling wall portion 23T of the damper chamber 23 and the ceiling wall portion 27T of the outer peripheral air passage 27A and the ceiling wall portion 30T of the outer case 30 are joined, but in reality, the ceiling wall portion 23T, A gap is formed between the 27T and the ceiling wall 30T so that the circuit board and the ion generator 200 are disposed.

  Further, as shown in FIG. 5, a plurality of rectifying plates 27 </ b> S are formed on the downstream side of the ion generator 200 on the lower surface of the ceiling wall portion 27 </ b> T of the air passage 27. Each rectifying plate 27 </ b> S has a predetermined height and extends from the ion generator 200 to the vicinity of the damper chamber 23.

  The ion generator 200 includes an electrode 201 that generates positive ions and an electrode 202 that generates negative ions.

  As shown in FIGS. 1 and 3, a bottom plate 24 is attached to the opening on the lower surface of the inner case 21 to close the opening. The bottom plate 24 is formed with an air inlet 25 and an air outlet 26.

  Further, a flange 21F is formed at the lower part of the inner case 21, and a front panel 70 is detachably attached to the flange 21F.

  A blower fan 40 is rotatably mounted in the blower fan chamber 22 of the inner case 21, and a motor M that rotates the blower fan 40 has a hole 21 </ b> H provided in the ceiling wall portion 21 </ b> T of the inner case 21 and an outer case. It mounts | wears with the hole (not shown) provided in the ceiling wall part 30T of 30, and these holes 21H are sealed.

  The air in the bathroom 12 is sucked from the air inlet 25 by the rotation of the blower fan 40 and is blown to the damper chamber 23 through the blower passage 27.

A damper 50 is disposed in the damper chamber 23 of the inner case 21 so as to be rotatable about a shaft 51 provided at one end thereof. The shaft 51 is rotatably held by support portions 23K provided on both side walls of the damper chamber 23 of the inner case 21.
[Outer case]
The outer case 30 is formed in a substantially rectangular parallelepiped shape, and the lower surface is opened. An exhaust port 31 is formed on the side surface of the outer case 30 so as to face the exhaust port 28 of the inner case 21, and the exhaust port 28 of the inner case 21 and the exhaust port 31 of the outer case 30 are joined. A connection duct 32 is attached. An exhaust duct (not shown) is connected to the connection duct 32 so that bathroom air is exhausted to the outside.
[front panel]
The front panel 70 is formed with a suction opening 71 that faces the air inlet 25 and a blowout opening 72 that faces the air outlet 26. As shown in FIG. 3, the suction opening 71 communicates with the air inlet 25 of the inner case 21, and the blowout opening 72 communicates with the air outlet 26 of the inner case 21.
[damper]
The damper 50 is configured to pivot between the position shown in FIG. 3 and the position shown in FIG. 18. When the damper 50 is positioned at the position shown in FIG. 3, the blowout port 26 is closed (fully closed) ( The exhaust port 31 is fully open), and the air blown to the damper chamber 23 by the blower fan 40 is guided to the exhaust port 28. When the damper 50 is positioned at the position shown in FIG. 18, the exhaust port 28 is closed (fully closed) (the outlet 26 is fully opened), and the air blown into the damper chamber 23 is guided to the outlet 26. .

  A cam plate 52 is provided at one end of the damper 50, and a long hole 53 is formed in the cam plate 52. A cam pin 146 to be described later is inserted into the long hole 53, and the damper 50 is opened and closed (rotated) around the shaft 51 by the rotational movement of the cam pin 146 to be described later.

A heater 60 is attached below the outlet 26 to heat the air blown out from the outlet 26 into the bathroom. The heater 60 is a PTC heater.
[Drive mechanism]
As shown in FIG. 4, the drive mechanism 100 is provided outside the side wall 23 </ b> S of the damper chamber 23. The drive mechanism 100 includes a stepping motor 101 that is a geared motor, a resin reduction gear 110, a resin link member 140, a resin pressing member 160, and the like.

A resin drive gear 103 is attached to the output shaft 102 (see FIG. 6) of the stepping motor 101, and the drive gear 103 meshes with the reduction gear 110. As shown in FIGS. 6 and 7, the stepping motor 101 is fixed to screw bosses B1 and B2 on the side wall 23S by screws N1 and N2.
[Reduction gear]
As shown in FIG. 8, the reduction gear 110 has a disk portion 112 formed with a gear 111 about 3/4 of the circumference, and a circular bulging portion 113 is formed at the center of one side surface of the disk portion 112. Is formed. A shaft portion 114 is integrally formed at the center of the bulging portion 113.

  A circular recess 112a is formed on the other side surface of the disc portion 112, and the recess 112a reaches the inside of the bulging portion 113 as shown in FIG. A hole 112H extending outward from the recess 112a is formed in the disc portion 112, and the recess 112a and the hole 112H are continuous as shown in FIG.

Further, a D-cut shaft 115 is formed at the center position in the concave portion 112a of the disc portion 112, and this shaft 115 projects outward from the concave portion 112a. A protrusion 116 projecting outward (in the radial direction) is formed at the end of the disc portion 112 where the gear 111 is not formed.
[Link member]
As shown in FIGS. 10 and 11, the link member 140 has a shaft portion 142 in which a D-cut shaft hole 141 is formed. The link member 140 extends in the radial direction at one end of the shaft portion 142 and is formed in the hole 112H of the reduction gear 110. A first arm portion 143 to be fitted is formed. A hole 143a is formed at the tip of the first arm part 143, and a magnet 144 is mounted in the hole 143a.

  A second arm portion 145 extending in the opposite direction to the first arm portion 143 is formed at the other end of the shaft portion 142, and a circular cam pin is formed on the left side surface (in FIG. 11) of the tip portion of the second arm portion 145. 146 is formed.

  As shown in FIGS. 7 and 12, the link member 140 is rotatably attached to the side wall 23S by inserting the shaft portion 142 of the link member 140 into the shaft hole 23J provided in the side wall 23S of the damper chamber 23. Yes. The shaft 115 of the reduction gear 110 is fitted into the shaft hole 141 of the shaft portion 142 of the link member 140, and the shaft portion 142 and the first arm portion 143 of the link member 140 are inserted into the recess 112a and the hole 112H of the reduction gear 110. The reduction gear 110 is attached to the link member 140 by being inserted.

The reduction gear 110 rotates integrally with the link member 140 with respect to the shaft hole 23J of the side wall 23S. The drive gear 103 of the output shaft 102 of the stepping motor 101 is engaged with the gear 111 of the reduction gear 110 attached to the link member 140.
[Pressing member]
As shown in FIG. 13, the pressing member 160 includes a pressing plate portion 161 that extends to the left and right, and a cylindrical portion 162 that is formed at the center of the pressing plate portion 161. Screw holes 161a and 161b are formed at both ends of the holding plate portion 161, and the shaft portion 114 of the reduction gear 110 is rotatably inserted into the hole 162a of the cylindrical portion 162, as shown in FIGS. Has been.

As shown in FIGS. 4 and 6, the pressing member 160 is fixed to screw bosses B3 and B4 provided on the side wall 23S of the damper chamber 23 by screws N3 and N4. As a result, both ends of the shaft portion 114 of the reduction gear 110 are rotatably supported by the pressing member 160 and the side wall 23S.
[Detection device]
4 and 6, reference numeral 170 denotes a detection device (detection means) for detecting the origin position of the reduction gear 110, and in this embodiment, has a Hall element (not shown) for detecting the magnet 144. As shown in FIGS. 4 and 6, the detection device 170 is fixed to a screw boss B <b> 5 provided on the side wall 23 </ b> S of the damper chamber 23 with a screw N <b> 5.

  A stopper plate 120 is disposed on a side surface 170a (see FIG. 6) of the detection device 170, and the stopper plate 120 is provided on a step portion 23D provided at a lower portion outside the side wall 23S as shown in FIGS. It has been.

  The protrusion 116 of the reduction gear 110 abuts on the stopper plate 120 to stop the rotation of the reduction gear 110. When the reduction gear 110 is rotated to a position where the projection 116 contacts the stopper plate 120, the damper 50 is fully closed (relative to the air outlet 26), and this position is used as the origin of the reduction gear 110. Yes, the detection device 170 is set to detect the magnet 144 when the reduction gear 110 is rotated to the origin position.

In this embodiment, the detection device 170 detects the magnet 144 before the reduction gear 110 rotates to the origin position.
[Control system]
FIG. 14 is a block diagram showing the configuration of the control system of the air conditioner 10. In FIG. 14, reference numeral 180 denotes an operation unit provided outside the bathroom 12, for example, in a bathroom, etc. The operation unit 180 controls each mode such as ventilation, drying, heating, and cool air by operating an operation key (not shown). Set. Reference numeral 300 denotes a control device (control means) that controls the stepping motor 101, the motor M, the heater 60, and the ion generator 200 based on the operation of the operation unit 180 and the detection of the detection device 170.

When the stepping motor 101 is driven, the control device 300 rotates to a predetermined angle at a speed slower than the normal speed at the initial stage, and then rotates at a normal speed.
[Operation]
Next, the operation of the air conditioner 10 configured as described above will be described.

  First, the case where the air conditioner 100 is installed on the ceiling 13 of the bathroom 12 and the installation work is completed will be described.

  First, the operation unit 180 is operated to turn on the power. When the power is turned on, the control device 300 causes the stepping motor 101 to rotate forward. Due to the forward rotation of the stepping motor 101, the reduction gear 110 is rotated counterclockwise in FIG.

  As the reduction gear 110 rotates counterclockwise, the cam pin 146 rotates clockwise in FIGS. 3 and 17 to rotate the damper 50 clockwise about the shaft 51. Since the damper 50 is rotated by the stepping motor 101 via the reduction gear 110, the damper 50 can be rotated even if the operating torque of the stepping motor 101 is small.

  The protrusion 116 of the reduction gear 110 is brought into contact with the stopper plate 120 by the counterclockwise rotation of the reduction gear 110.

  The control device 300 outputs a predetermined pulse even after the detection device 170 is turned on, so that the protrusion 116 of the reduction gear 110 is reliably brought into contact with the stopper plate 120. Thereby, the origin position of the reduction gear 110, that is, the origin position of the damper 50 can be reliably detected.

  Further, by bringing the projection 116 of the reduction gear 110 into contact with the stopper plate 120, the origin position can be reliably detected without being affected by backlash due to the provision of the reduction gear 110.

  The rotation speed of the stepping motor 101 at this time is rotated at a normal speed from the beginning to the end, but may be rotated at a low speed only at the initial stage.

The control device 300 controls the stepping motor 101 to move the damper 50 to a predetermined position with reference to the position of the damper 50 shown in FIG. 18, that is, the position of the reduction gear 110 shown in FIG.
[Cool wind mode, Dry mode]
For example, when the cool breeze mode is set by the operation of the operation unit 180, the control device 300 outputs a preset number of pulses to drive the stepping motor 101 in the reverse direction, and the damper 50 is the intermediate shown in FIG. Move to position. Since the stepping motor 101 is driven to rotate in reverse by the set number of pulses with reference to the position shown in FIG. 18, the damper 50 can always be accurately moved to the intermediate position shown in FIG. When the damper 50 is moved to the intermediate position shown in FIG. 17, the reduction gear 110 is rotated to the position shown in FIG.

  When driving the stepping motor 101, the control device 300 drives the stepping motor 101 at a low speed (high torque) at an initial time, and then drives it at a normal speed with a low torque. For this reason, even if the damper 50 adheres to the position shown in FIG. 18 with dust etc., the damper 50 can be reliably rotated. That is, it is possible to prevent the damper 50 from being switched.

  When the damper 50 moves to the intermediate position shown in FIG. 17, the control device 300 drives the motor M to rotate the blower fan 40. The rotation of the blower fan 40 causes the air in the bathroom 12 to be sucked from the air inlet 25 as shown by an arrow O as shown in FIG. 17, and a part of the air sucked into the air inlet 25 passes through the air passage 27. As shown by the arrow Q, the air is exhausted from the exhaust port 28 to the outside.

  On the other hand, the remaining air blows out from the outlet 26 to the bathroom 12 through the air passage 27 as indicated by an arrow P.

  In this way, a part of the air in the bathroom 12 is exhausted to the outside, so the air outside the bathroom 12 enters the bathroom 12 due to an undercut of the door or the like, and the wind is sent into the bathroom 12 from the outlet 26. The bathroom 12 is in a cool breeze state.

In the drying mode, the rotation of the damper 50 is performed in the same manner as described above, the heater 60 is energized, hot air is blown out from the outlet 26, and the moist air is exhausted from the outlet 28 so that the bathroom 12 is exhausted. Is dried.
[Ventilation mode, heating mode]
When the damper 50 is moved to the intermediate position shown in FIG. 17 and the ventilation mode or the heating mode is set by operating the operation unit 180, the control device 300 outputs a predetermined number of pulses to turn the stepping motor 101 on. The damper 50 is moved to the position shown in FIG. 3 or FIG. The number of pulses at the time of this movement is set to a larger number than the tip 50a of the damper 50 abuts on the edge 26a of the blower outlet 26 or the ceiling wall 27T of the air duct 27, and the tip 50a of the damper 50 blows. It reliably contacts the edge 26a of the outlet 26 and the ceiling wall 27T of the air passage 27.

  That is, by outputting a larger number of pals, the tip 50a of the damper 50 can be reliably brought into contact with the edge of the outlet 26 without being affected by the backlash of the reduction gear 110.

  Further, during the movement, the damper 50 is hardly fixed at the intermediate position shown in FIG. 17, so that the damper 50 is moved at a normal speed. However, similarly to the above, the stepping motor 101 is moved at a low speed at the initial stage. It may be driven and then driven at a normal speed.

When the damper 50 is moved to the position shown in FIG. 3, the air is exhausted from the exhaust port 28 as indicated by the arrow Q in FIG. Further, when moved to the position shown in FIG. 18, air is blown out from the outlet 26 as indicated by an arrow P, warm air is sent to the bathroom 12 by energization of the heater 60, and the bathroom 12 is heated. Become.
[Stop mode]
When a stop switch (not shown) of the operation unit 180 is operated during the ventilation mode or the cool breeze mode, the control device 300 stops driving the motor M and drives the stepping motor 101 to rotate forward. 3 or the damper 50 at the intermediate position in FIG. 17 is rotated to the position shown in FIG. During this rotational movement, the number of pulses larger than the number of pulses necessary to move to the position shown in FIG. 18 is output, and the protrusion 116 of the reduction gear 110 is securely brought into contact with the stopper plate 120, thereby the damper 50. The stepping motor 101 is stopped by reliably detecting the origin position.

  At this time, the origin position can be reliably detected without being affected by backlash as described above.

  When the damper 50 is moved from the position shown in FIG. 3 to the position shown in FIG. 18, the stepping motor 101 is driven at a low speed (high torque) at the initial time, and thereafter at a normal speed (low torque), as described above. Drive. For this reason, even if the damper 50 adheres to the position shown in FIG. 3 with dust etc., the damper 50 can be reliably rotated.

  When the damper 50 is moved from the intermediate position shown in FIG. 17 to the position shown in FIG. 18, the stepping motor 101 is driven at a normal speed, but it may be driven at a low speed at the initial stage in the same manner as described above.

When each mode is set by operating the operation unit 180 in this stopped state, the control device 300 controls the stepping motor 101 with reference to the position shown in FIG. I will move to.
[24 hour ventilation]
When the damper 50 is moved to the position shown in FIG. 18 (in the stop mode), when the 24-hour ventilation (always ventilation) is set by the operation of the operation unit 180, the control device 300 moves the damper 50 to the position shown in FIG. The stepping motor 101 is controlled on the basis of the position shown in FIG. 3 to move the damper 50 to the position shown in FIG.

  When the damper 50 is moved, the number of pulses larger than the number of pulses necessary to move to the position shown in FIG. 3 is output in the same manner as described above, and the tip 50a of the damper 50 is applied to the edge of the outlet 26. Make sure it is in contact. At this time, by outputting a larger number of pulses as described above, the tip 50a of the damper 50 can be reliably brought into contact with the edge of the outlet 26 without being affected by backlash.

  In addition, when the damper 50 is moved, the stepping motor 101 is driven at a low speed at the initial stage, and thereafter driven at a normal speed. For this reason, even if the damper 50 adheres to the position shown in FIG. 18 with dust etc., the damper 50 can be reliably rotated.

  When the damper 50 is moved to the position shown in FIG. 3 and the blower fan 40 is rotated, the air in the bathroom 12 is sucked from the intake port 25 as shown by the arrow O, and is moved to the arrow Q through the blower passage 27. As shown in the figure, the air is exhausted from the exhaust port 28 to ventilate the bathroom 12, and the other rooms are also ventilated through the bathroom 12.

  In the case of this 24-hour ventilation, the rotational speed of the blower fan is set so that the building is ventilated 0.5 times in one hour.

  As described above, when the damper 50 is rotated and moved, the stepping motor 101 is rotated at a low speed at the initial stage. Thereafter, the stepping motor 101 is rotated at a normal speed, so that the damper 50 is quickly moved to a predetermined position. Can be moved to.

Further, as shown in FIG. 7, both ends of the shaft portion 114 of the reduction gear 110 are rotatably supported by the pressing member 160 and the side wall 23S of the damper 23 chamber, so that the stepping motor 101 is driven. Sometimes, the reduction gear 110 does not lift from the drive gear 103, so that the drive torque of the stepping motor 101 can be sufficiently transmitted to the reduction gear 110.
[When fixed]
Next, a case where the damper 50 is fixed at the position shown in FIG.

  When the damper 50 is located at the position shown in FIG. 18, the reduction gear 110 is located at the position shown in FIG. 16, the projection 116 of the reduction gear 110 abuts against the stopper plate 120, and the detection device 170 detects the magnet 144. The origin position of the damper 50 is detected.

  In this state, the control device 300 drives the stepping motor 101 with high torque (low speed), but when the damper 50 does not rotate, the detection device 170 continues to detect the magnet 144 and the detection device 170 does not turn off.

  While the detection device 170 is not turned off, the control device 300 continues to output pulses for driving the stepping motor 101 at a low speed, and the number of pulses reaches a number that allows the reduction gear 110 to rotate 30 degrees clockwise in FIG. If the detection device 170 is not turned off, it is determined that the damper 50 is fixed, and a pulse for rotating the reduction gear 110 counterclockwise (in FIG. 16) is output. A low-speed pulse that only rotates 110 degrees clockwise (in FIG. 16) by 30 degrees is output. These operations are repeated until the detection device 170 is turned off. When the detection device 170 is not turned off even when the number of repetitions reaches, for example, 10, the damper 50 is determined to remain fixed, and the control device 300 operates the operation unit. An error is displayed on a display unit (not shown) provided at 180 and the driving of the stepping motor 101 is stopped.

  When the damper 50 is fixed at the position shown in FIG. 3, even if the control device 300 outputs the number of pulses necessary for the damper 50 to move from the position shown in FIG. 3 to the position shown in FIG. When the magnet 144 is not detected, that is, when the detection device 170 is not turned on, the control device 300 determines that the damper 50 is fixed at the position shown in FIG.

Then, in the same manner as described above, the control device 300 repeats forward / reverse rotation of the stepping motor 101 a plurality of times, and then outputs a pulse necessary to move to the position shown in FIG. When the damper 50 does not rotate by the output of this pulse, the detection device 170 remains off because the detection device 170 does not detect the magnet 144, and the control device 300 fixes the damper 50 at the position shown in FIG. The display unit (not shown) provided in the operation unit 180 displays an error, and the driving of the stepping motor 101 is stopped.
[About link members]
By the way, the shaft portion 142 and the first arm portion 143 of the link member 140 shown in FIG. 11 are fitted into the recess 112a and the hole 112H of the reduction gear 110 shown in FIG. Since the shaft 115 is fitted into the shaft hole 141 of the link member 140, the rotational force of the reduction gear 110 is transmitted to the shaft portion 142 of the link member 140 via the shaft 115, and the hole 112 </ b> H of the reduction gear 110 is also transmitted. Since the transmission is transmitted to the first arm portion 143 of the link member 140, a large load is not applied only to the shaft 115 of the reduction gear 110 when the damper 50 is rotationally moved. Even the shaft 115 is not damaged when the damper 50 is rotated.
[Rotating movement of damper]
The rotational movement of the damper 50 is performed by rotating the cam pin 146 as shown in FIGS. That is, it is performed by rotating the stepping motor 101 forward / reversely and rotating the reduction gear 110 forward / reversely, and there is no need to rotate the reduction gear 110 once. For this reason, the damper 50 can be rotated and moved only at the position in the range of the arrow R far away from the shaft 51, and the load applied to the stepping motor 101 can be reduced.

  That is, since the cam pin 146 is set to rotate at a position opposite to the position of the shaft 51 of the damper 50 with respect to the rotation center of the cam pin 146 (the shaft 115 of the reduction gear 110), the stepping is performed. The load applied to the motor 101 can be reduced.

  Further, since it is not necessary to rotate the reduction gear 110 once, the damper 50 can be moved to a predetermined position with the shortest rotation movement of the reduction gear 110, and thus the damper 50 can be quickly rotated to a predetermined position. It is possible to prevent wasteful power consumption.

Furthermore, since the damper 50 is rotationally moved by the stepping motor 101, the accuracy of the rotational position of the damper 50 can be increased.
[Ion generation]
In the ion generator 200, when the heating mode or the air blowing mode is set, the ion generator 200 operates, positive ions are generated from the electrode 201 shown in FIG. 5, and negative ions are generated from the electrode 202. Ions are sent into the bathroom 12 from the outlet 26, but the positive ions and the negative ions are not immediately combined and disappeared by the rectifying plate 27 </ b> S provided in the ceiling wall portion 27 </ b> T of the air passage 27. A large amount of positive ions and negative ions can be supplied to the bathroom 12.

  In the above-described embodiment, the damper 50 is switched by normal rotation or reverse rotation of the stepping motor 101. However, the damper 50 may be switched by rotating in one direction.

  Moreover, although the said Example demonstrated the air conditioner 10 for bathrooms, it is not restricted to this, What is necessary is just a ventilation apparatus which performs the flow of air by switching a damper.

  The present invention is not limited to the above-described embodiments, and design changes and additions are permitted without departing from the spirit of the invention according to each claim of the claims.

10 Air conditioner (blower)
25 Intake port 26 Outlet 28 Exhaust port 40 Blower fan 50 Damper 51 Shaft 101 Stepping motor 110 Reduction gear

Claims (5)

In the main body case having an intake port for taking in indoor air, an exhaust port for exhausting the intake air to the outside, and a blowout port for returning air taken in from the intake port to the room, the intake air Blower provided with a blower that sucks air from the mouth and blows air, and a damper that switches the air blow direction of the air blown from the blower around the axis to the exhaust port or the outlet. A device,
A stepping motor for rotating the damper;
A reduction gear for reducing the rotation speed of the output shaft of the stepping motor;
The blower characterized in that the damper is rotated by the stepping motor via the reduction gear. Providing a cam pin that pivots with the rotational movement of the reduction gear around the axis of the reduction gear;
The damper is rotated by the rotational movement of the cam pin,
The blower according to claim 1, wherein the pin is set to rotate at a position opposite to the position of the shaft of the damper.   When the damper is moved from the stop position to another position, there is provided control means for driving the stepping motor at a low speed slower than a normal speed during an initial operation and thereafter driving the stepping motor at a normal speed. The air blower according to claim 1 or 2. When detecting that the damper is positioned at a predetermined stop position, and when moving the damper from the predetermined stop position to another position,
The control means outputs a pulse for rotating the damper to a predetermined angle at the low speed, and then a pulse for returning the damper from the position at the predetermined angle to the stop position when the detecting means detects the damper. Is output, and the operation is repeated a plurality of times.   The blower according to any one of claims 1 to 4, further comprising heating means for warming air blown from the blower outlet.