JP4735364B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilator that is installed in a house, an office room, or the like, and sucks indoor air and discharges it to the outside, or sucks outdoor air and supplies it to the room to realize ventilation.

  2. Description of the Related Art Conventionally, a ventilator that is installed in a wall hole formed in a wall portion of a building such as a house has been proposed. In such a ventilator, a shutter that can be opened and closed is provided in front of an intake port such as a propeller fan in order to prevent outside air from entering when the ventilation operation is stopped (see, for example, Patent Document 1).

  In addition, as an example of a shutter, a ventilation device has been proposed in which a damper plate that is opened and closed by a slide is provided on the front surface of a main body portion where an air inlet is formed.

  FIG. 6 is a block diagram showing an example of a conventional ventilation device provided with a damper plate that is opened and closed by sliding.

  In the conventional ventilator 101, a motor 103 is fixed outside the main body 102, and an impeller 104 such as a propeller fan is attached to a rotation shaft of the motor 103. The front surface of the main body 102 is opened in a circular shape to form an intake port 105.

  A pair of damper plates 106 are slidably attached to the front surface of the main body 102. The opening / closing operation of the damper plate 106 is realized by the rack mechanism 107. Further, by electrically driving the rack mechanism, a ventilation device is realized in which the shutter is automatically opened during ventilation and the shutter is automatically closed when ventilation is stopped to prevent backflow.

  A grill 108 that is a decorative frame is attached to the front side of the main body 102. Conventionally, a suction port with slit-like openings arranged on the front surface of the grill 108 has been formed. However, for the purpose of improving the appearance, a configuration in which the front surface of the grill 108 is closed and a suction port is formed on the side surface is also proposed. Has been.

Japanese Patent No. 2616612

  However, in a conventional ventilator configured to include a damper plate that opens and closes by sliding as a shutter on the front surface of the main body portion where the air inlet is formed, the damper plate during ventilation is provided due to the thickness of the damper plate and the rack drive mechanism. When opened, a step is formed on the surface of the main body.

  For this reason, when the airflow sucked from the intake port passes through the damper plate and the rack drive mechanism, the airflow is separated due to the steps of the damper plate and the like, leading to an increase in loss and vortex loss, resulting in a decrease in air blowing performance. It was.

  In addition, the mechanism for opening and closing the damper plate is complicated, easily damaged, and expensive to manufacture.

  Furthermore, as disclosed in Patent Document 1, the configuration in which the shutter is provided on the front surface of the air intake port has a problem in that it cannot be configured to intake air from the side surface of the grill.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a ventilator with reduced loss.

  In order to solve the above-described problems, a ventilator according to the present invention includes a fan unit having an impeller that is rotationally driven, an intake port formed by opening a front surface along the axial direction of the impeller, and an intake port. A suction port forming portion that forms a suction port by opening a side along the outer edge of the suction port, and a shape along the flow of air sucked from the suction port. And a rotation damper that opens and closes the suction port by rotating about a rotation axis along the direction.

  In the ventilator of the present invention, when the suction port is closed by the rotating damper, the intrusion of outside air through the intake port is prevented.

  When the rotating damper is opened, the suction port is opened, and air is sucked from the suction port through the suction port by the airflow generated by the rotation of the impeller. Since the rotating damper has a shape along the flow of air sucked from the intake port, the air passing through the intake port is rectified in accordance with the airflow generated by the rotation of the impeller, and the loss is reduced.

  Further, the ventilation device of the present invention has a link mechanism that connects a plurality of rotating dampers, and includes a rotating damper drive mechanism that opens and closes each rotating damper in conjunction with each other, so that a plurality of sheets can be obtained with a simple configuration. The rotating damper is opened and closed in conjunction.

  Further, the rotation damper drive mechanism includes a lever member that converts linear motion into rotation motion on a rotation shaft of one rotation damper and an electric actuator that moves the lever member, and opens and closes the rotation damper and blades. By interlocking with the rotation of the car, a function that automatically opens the rotating damper to ventilate when driving and closes the rotating damper to shut off the outside air automatically when operation is stopped is realized with a simple configuration. The

  According to the ventilator of the present invention, the air passing through the suction port is rectified in accordance with the airflow generated by the rotation of the impeller by the rotating damper that opens and closes the suction port, so that the loss is reduced and the air blowing performance. Will improve.

  Further, by providing the rotating damper with a function as a rectifying plate, the number of parts can be reduced, and the drive mechanism of the damper can be realized with a simple configuration, so that a ventilator with few failures can be provided at low cost. Furthermore, since the damper drive mechanism can be easily electrified, a ventilation device that links ventilation operation and opening / closing of the rotary damper can be provided at low cost.

  Hereinafter, an embodiment of a ventilation device of the present invention will be described with reference to the drawings.

<Configuration example of ventilation device of the present embodiment>
FIG. 1 is a perspective view showing an example of a ventilator 1A of the present embodiment, and FIG. 2 is a side view showing an example of the ventilator 1A of the present embodiment.

  In a building such as a house, the ventilation device 1A is installed in a wall hole 53 that penetrates a wall 51 and communicates an indoor 52a and an outdoor 52b. The ventilation device 1A includes a centrifugal fan 3 that pumps air by a centrifugal impeller 2 in order to suck air in the room 52a and discharge it to the outdoor 52b. The ventilator 1 </ b> A includes a rotating damper 6 that opens and closes the flow path 5 to the intake port 4 of the centrifugal fan 3 and has a function as a rectifying plate that rectifies the air sucked into the intake port 4. .

  Centrifugal fan 3 is an example of a fan part constituted by, for example, a turbofan, and main body part 7 having a circular intake port 4 formed by opening a front surface along the axial direction of centrifugal impeller 2, and main body part 7. Is provided with a cylindrical air passage forming tube portion 8 extending rearward from the intake port 4 along the axial direction of the centrifugal impeller 2.

  In the centrifugal fan 3, the motor 9 is attached to the rear end portion of the air passage forming cylinder portion 8, and the centrifugal impeller 2 is attached to the rotating shaft of the motor 9. The intake port 4 is formed with a bell-shaped bell mouth 4a whose inner diameter is gradually reduced, and the centrifugal impeller 2 is disposed in the air passage forming cylinder portion 8 inside the bell mouth 4a.

  Further, the air passage forming cylinder portion 8 has an exhaust port 10 formed by opening an outer peripheral surface on the rear end side. As a result, the centrifugal fan 3 is driven to rotate by the motor 9 by the centrifugal impeller 2 so that air is sucked from the air inlet 4 and the sucked air is discharged from the air outlet 10.

  The centrifugal fan 3 includes a suction port forming part 11 on the front surface of the suction port 4. The suction port forming part 11 is attached to the main body part 7 via a foot part 11a having a predetermined length, a circular plate-like member covering the air inlet 4.

  As a result, the centrifugal fan 3 is spaced apart from the front surface of the main body 7 by a predetermined distance, and the front surface of the intake port 4 is blocked by the suction port forming portion 11. A plurality of suction ports 12 are formed along the outer edge of the port 4.

  The rotary damper 6 has, for example, an arc shape along the outer edge of the air inlet 4 so that the plurality of rotary dampers 6 can rotate about the rotary shaft 6a along the axial direction of the centrifugal impeller 2 as a fulcrum. And attached to each suction port 12.

  In this example, two rotary dampers 6 having a 1/2 arc shape are provided corresponding to the two suction ports 12 formed in a 1/2 arc shape. Each rotating damper 6 has a rotating shaft 6a in the vicinity of the center of the arc shape, and each rotating damper 6 is rotated about the rotating shaft 6a as a fulcrum, so that the two rotating dampers 6 form a substantially cylindrical shape. The suction inlet 12 is closed by setting it as the direction to be.

  On the other hand, by rotating each rotation damper 6 around the rotation shaft 6a as a fulcrum, the suction opening 12 is opened by the direction in which the two rotation dampers 6 form a substantially S shape. .

  The rotary damper 6 is opened and closed by a rotary damper drive mechanism 13. FIG. 3 is a block diagram showing an example of the rotary damper drive mechanism 13. FIG. 3A is a plan view of the ventilator 1A viewed from the front side, and FIG. 3B is a plan view of the ventilator 1A viewed from the back side. FIG. Here, in Fig.3 (a), the state which removed the suction inlet formation part 11 is shown.

  The rotating damper drive mechanism 13 is attached to a solenoid 14 that generates a driving force for rotating the pair of rotating dampers 6 and a rotating shaft 6 a of one rotating damper 6, and rotates the linear motion of the solenoid 14. A lever 15 that converts the rotational motion of the damper 6 and a link mechanism 16 that transmits the driving force of the solenoid 14 transmitted to one rotational damper 6 to the other rotational damper 6 are provided.

  The solenoid 14 is an example of an electric actuator, and the presence / absence of energization is controlled in conjunction with operation of an operation unit such as a switch (not shown) that operates rotation and stop of rotation of the motor 9.

  The lever 15 is an example of a lever member, and is configured to have a short length with respect to the length of the rotating damper 6 in the arc direction, and has a large angle necessary for the rotating damper 6 to be released from a linear motion with a short stroke. It is configured to obtain a rotational motion.

  The link mechanism 16 connects one rotating damper 6 and the other rotating damper 6 with a rod 16a. One pivot damper 6 and the fulcrum part 16b connected so that the rod 16a can rotate, and the other pivot damper 6 and the fulcrum part 16c connected so that the rod 16a can rotate are respectively connected to the pivot shaft 6a. Are formed on the same side. As a result, when the driving force is transmitted from the one rotary damper 6 to the other rotary damper 6 by the link mechanism 16, the one rotary damper 6 and the other rotary damper 6 support the rotary shaft 6a. Rotate in the same direction.

  In addition, the rod 16a of the link mechanism 16 is bent into a shape along the shape of the gap between the two open rotation dampers 6 so that the rotation angle of the rotation damper 6 can be increased.

  In the ventilation device 1 </ b> A, a grille 21 that is a decorative frame is attached to the front side of the main body 7. The front surface of the grill 21 is closed, and a suction slit 21a is formed on the side surface.

<Operation example of the ventilation device of the present embodiment>
4 and 5 are explanatory diagrams showing an operation example of the ventilator 1A according to the present embodiment. Next, the operation of the ventilator 1A will be described with reference to the drawings. Here, in Fig.4 (a), the state which removed the suction inlet formation part 11 is shown.

  When the ventilation device 1A is not in operation, that is, when a switch (not shown) or the like is operated to stop the rotation of the motor 9 that rotationally drives the centrifugal impeller 2, the solenoid 14 that opens the rotary damper 6 is not energized. .

  When the solenoid 14 is not energized, the respective rotation dampers 6 are interlocked by the link mechanism 16 and rotated about the rotation shaft 6a by a biasing force of a spring (not shown), as shown in FIG. In addition, the suction port 12 is closed in the direction in which the two rotary dampers 6 form a substantially cylindrical shape.

  This prevents the air (outside air) in the outdoor 52b shown in FIG. 2 from entering the indoor 52a while the ventilation operation is stopped.

  During operation of the ventilation device 1A, that is, when a switch (not shown) or the like is operated to rotate the motor 9 that rotationally drives the centrifugal impeller 2, the solenoid 14 that opens the rotating damper 6 is energized.

  When the solenoid 14 is energized and the end of the lever 15 is pulled in the direction of the arrow F1, one of the rotating dampers 6 rotates in the direction of the arrow C1 about the rotating shaft 6a. When one rotating damper 6 rotates in the direction of arrow C1 with the rotating shaft 6a as a fulcrum, driving force is transmitted from one rotating damper 6 to the other rotating damper 6 by the link mechanism 16, and one rotating damper 6 rotates. The damper 6 and the other rotating damper 6 rotate in the same arrow C1 direction about the rotating shaft 6a. Then, the suction opening 12 is opened in a direction in which a substantially S-shape is formed by the two rotary dampers 6.

  Thereby, when the centrifugal impeller 2 is rotationally driven by the motor 9 in the direction of arrow C2, air is sucked from the suction port 4 through the suction slit 21a and the suction port 12 on the side surface of the grille 21, and the sucked air is exhausted. It is discharged from the mouth 10.

  Now, the airflow sucked from the suction port 12 which is a gap between the main body part 7 and the suction port forming part 11 is rectified by flowing along the rotary damper 6 as shown by the arrow A, and the centrifugal impeller 2 rotates. As a result, the flow is matched to the direction of the air flow inside the air passage forming cylinder portion 8 that is generated, so the loss is reduced and the ventilation (ventilation) performance is improved.

  As in the conventional ventilator described with reference to FIG. 6, when the damper plate that opens and closes by sliding is provided on the front surface of the main body portion where the air inlet is formed, the airflow along the main body portion is separated by a step formed by the damper plate. Occurs, causing the phenomenon of friction and vortex loss. On the other hand, in the ventilator 1A of the present embodiment, it is not necessary to provide a structure that obstructs the airflow on the front surface of the main body portion 7 where the air inlet 4 is formed, and therefore friction and vortex loss occur. do not do.

  Further, since the rotation damper 6 is opened and closed by a rotation operation at a predetermined angle, the rotation shaft 6a is provided with the lever 15, so that the rotation damper 6 can be opened and closed by a short stroke linear motion, and a plurality of rotation dampers are provided. 6 can be interlocked by connecting with a link mechanism 16, and an electric rotating damper driving mechanism can be realized with a simple structure.

  Furthermore, since the front side of the grille 21 can be closed with a shutter provided by the rotating damper 6, the impeller and the like are not visible, the appearance is improved, fan noise leakage is reduced, and noise is reduced. can do.

<Modification of ventilation device of the present embodiment>
In the above-described ventilator, the rotary damper 6 is configured to open and close by the driving force of the electric actuator. However, the rotary damper 6 is manually opened and closed by connecting a manually operable member to the lever 15 or the like. It is also possible.

  Further, the number of rotating dampers 6 is not limited to two, and may be a plurality of three or more.

  Furthermore, the shape of the rotary damper 6 is an arc shape, but is not limited to this, and may be a flat plate shape, a polygonal shape, or the like.

  The present invention is applied to a ventilation device installed in a house or the like.

It is a perspective view which shows an example of the ventilation apparatus of this Embodiment. It is a side view which shows an example of the ventilation apparatus of this Embodiment. It is a block diagram which shows an example of a rotation damper drive mechanism. It is explanatory drawing which shows the operation example of the ventilation apparatus of this Embodiment. It is explanatory drawing which shows the operation example of the ventilation apparatus of this Embodiment. It is a block diagram which shows an example of the conventional ventilation apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1A ... Ventilator, 2 ... Centrifugal impeller, 3 ... Centrifugal fan, 4 ... Intake port, 4a ... Bell mouth, 5 ... Flow path, 6 ... Rotation damper , 6a ... rotating shaft, 7 ... body part, 8 ... air path forming cylinder part, 9 ... motor, 10 ... exhaust port, 11 ... suction port forming part, 12. ..Suction port, 13 ... Rotary damper drive mechanism, 14 ... Solenoid, 15 ... Lever, 16 ... Link mechanism, 16a ... Rod, 16b, 16c ... Support point

Claims (5)

A fan unit having an impeller that is rotationally driven;
An intake port formed by opening a front surface along the axial direction of the impeller;
A suction port forming part that covers the front surface of the suction port and opens a side along the outer edge of the suction port to form a suction port;
A rotation damper having a shape along the flow of air sucked from the intake port and rotating about a rotation axis along the axial direction of the impeller to open and close the intake port; Ventilator characterized by. The ventilation apparatus according to claim 1, further comprising a rotation damper driving mechanism that includes a link mechanism that connects the plurality of rotation dampers, and that opens and closes the rotation dampers in conjunction with each other. The rotary damper drive mechanism includes a lever member that converts linear motion into rotary motion on the rotary shaft of one of the rotary dampers,
An electric actuator for moving the lever member;
The ventilator according to claim 2, wherein opening and closing of the rotating damper and rotation of the impeller are interlocked. The ventilator according to claim 1, 2, or 3, wherein the fan unit includes a centrifugal impeller as the impeller. The ventilator according to claim 1, 2, 3 or 4, further comprising a grill on the front side of the main body portion, the front of the intake port being closed and a suction port formed on a side surface.

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