JPH0672712B2 - Air conditioning fan - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a heat exchanger to exchange heat between an exhaust flow discharged from the room to the outside and a supply air supplied from the room to the room during ventilation. The present invention relates to an air conditioning ventilation fan that reduces energy loss at the time.

2. Description of the Related Art Conventionally, the shutter of an air-conditioning ventilation fan that is attached to a wall surface and simultaneously supplies and discharges through a pipe has a simple structure but has a high shutter effect, so a manual slide type consisting of a flat plate that does not interlock with the ventilation fan operation switch. Shutters were often used.

The air conditioning ventilation fan using this slide type shutter
As shown in the figure, 100 is the air conditioning ventilation fan body in the figure,
A slide type shutter 103 for opening and closing the air supply port 101 and the exhaust port 102 is provided on the back surface thereof, and the shutter 103 is indicated by an arrow.
Shutter 1 by sliding manually to 105 side
When the opening 104 provided in 03 coincides with the air supply port 101, the shutter 103 is disengaged from the exhaust port 102, and both the air supply port 101 and the exhaust port 102 are opened, and conversely, when sliding toward the arrow 106 side, The inlet 101 and the outlet 102 are shutters.
Blocked by 103 and closed. Note that FIG. 4 shows the shutter 1
A closed state of 03 is shown, and 107 is a partition plate for preventing mixing of the supply air flow and the exhaust air flow.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Since the conventional manual slide type shutter 103 does not interlock with the operation switch of the air conditioning ventilation fan main body 100, it is necessary to operate the air conditioning ventilation fan main body 100 and not to manually open the shutter 103. The indoor air cannot be exhausted to the outside or the outdoor air cannot be exhausted to the room. However, even if the operator forgets to open the shutter 103 and operates the air conditioning ventilation fan main body 100, the user may not notice it, and even if the air conditioning ventilation fan main body 100 is automatically operated by a sensor or the like, There is a problem that the shutter 103 does not open and close, and the user must open and close the shutter 103 each time, and the original function as automatic operation cannot be exhibited.

The present invention has been made in consideration of the above-mentioned conventional problems, and an object thereof is to provide an air-conditioning ventilation fan provided with a switch that can open and close the shutter electrically and automatically open and close the shutter without manual operation.

Means for Solving the Problems In order to achieve the above object, the present invention provides a gear motor in which one drive terminal is connected to one pole of a power source, a movable contact connected to the other pole of the power source, and Of an operation switch having two fixed contacts that are switchably connected to a movable contact, a normally open contact connected to one of the fixed contacts, a normally closed contact connected to the other of the fixed contacts, and the other of the gear motor. A micro switch having a common contact connected to the drive terminal of the cam, a cam fixed to the output shaft of the gear motor, for switching the conduction state of the normally open contact and the normally closed contact every half rotation of the output shaft, and the micro switch. The mounting direction is determined according to the position of the cam that operates the switch, and the crank fixed to the output shaft is connected to the operation switch and the micro switch. Then, while the cam is rotating counterclockwise, the air conditioning ventilation fan body is provided with a switch consisting of a timer that holds the electricity to the normally open contact or the normally closed contact even if the movable contact is switched midway. A flat plate shutter that reciprocates on a plane to open and close the exhaust port and the air supply port formed in the air conditioning ventilation fan main body is provided, and the tip of the crank is provided in a groove provided in the shutter in a direction intersecting the moving direction. The engaging projection provided on the above is movably engaged, and a blower is connected to one pole of the power source and one of the fixed contacts.

Effect According to the present invention, when the movable contact of the operation switch is connected to one of the fixed contacts and turned on, the blower starts operation, and at the same time, the gear motor is energized via the timer and the micro switch, and its output shaft Begins to rotate. At this time, the timer is also activated. Then, the crank fixed to the output shaft rotates, and the engaging projection at the tip of the crank moves while engaging in the groove of the shutter, and the operation of the engaging projection causes the shutter to move to the exhaust port. When the air supply port is moved in the opening direction and the cam fixed to the output shaft reaches the half-turn position, the shutter is fully opened and the conductive side of the microswitch is moved from the normally open contact to the normally closed contact by the cam. , The power supply to the gear motor is cut off, and the movement of the shutter is stopped. Then, when the blower is stopped and the shutter closes the exhaust port and the air supply port, the operation switch is connected to the other fixed contact side. Then, the blower stops, and the gear motor is energized via the normally closed contact of the micro switch in the conductive state to start rotation, and the crank rotates to cause the shutter to be exhausted by the engaging protrusion at the tip. When the cam makes a half turn, the shutter is completely closed, and the microswitch switches the normally open contact to the normally open contact and closes the normally open contact to the gear motor. The power supply to the shutter is cut off, and the movement of the shutter stops.
Then, during the opening or closing operation of the shutter,
Even if the fixed switch of the operation switch is changed, the normally open contact or the normally closed contact is not energized by the timer and is kept as it is until the cam makes a half rotation to change the operation of the micro switch. As a result, the shutter does not stop at a midway position.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, reference numeral 1 is a switch provided on the back surface of the air-conditioning ventilation fan main body 8, which is a gear motor 2 and an output shaft of the gear motor 2.
It is fixed to 2a and a step is provided at one location on the circumference. One semicircle side up to the side opposite to this step is a large diameter semicircle 3a, and the other semicircle side is a small diameter semicircle 3b. The cam 3, the crank 4 also fixed to the output shaft 2a, and the cam 3 are provided in the vicinity of the cam 3. When the large-diameter semicircle 3a of the cam 3 rotates, its operating lever 5a is pressed to be in a continuous state. A microswitch 5 having a normally closed contact Nc that is released from the pressing of the operating lever 5a when the open contact No and the small diameter semicircle 3b of the cam 3 is rotated and is switched to a conducting state, and a timer 6 described later. ing. The crank 4 has an engaging projection 4a at its tip.
Is installed, and the mounting direction of the cam 3 is the micro switch 5
When the position where the conduction state is switched is switched to the horizontal direction, that is, the engagement protrusion 4a is positioned farthest from the output shaft 2a in the horizontal direction. Further, on the back surface of the main body 8 of the air conditioning ventilation fan, there is a recess 9
The shutter 7 for opening and closing the air supply port 11 and the exhaust port 12 formed of a flat plate and provided in the air conditioning ventilation fan main body 8 is fitted in the recess 9 so as to be movable in the left-right direction. The shutter 7 is provided with an opening 14 substantially in the center and a groove 13 formed in the vertical direction in the vicinity of the opening 14. An engaging projection 4a provided at the tip of the crank 4 is movably engaged with the groove 13.

In the electric circuit of the air-conditioning ventilation fan of this embodiment, one drive terminal 2b of the gear motor 2 and one pole of the power source 16 are connected by a fixed contact K of the operation switch 15, as shown in FIG. Further, the movable contact A of the operation switch 15 is connected to the other pole of the power source 16, and the two fixed contacts O and S switched and connected to the movable contact A have one fixed contact O as a microswitch. 5 is a normally open contact No. 5 and the other fixed contact S is connected to a normally closed contact Nc. The common contact C of the micro switch 5 is connected to the other drive terminal 2c of the gear motor 2. And the driving switch 15
A timer 6 is connected between the micro switch 5 and the micro switch 5. The timer 6 keeps the movable contact A in the middle until the cam 3 half-turns to switch the conductive state of the micro switch 5, and the fixed contact O, S. Even if it is switched to any one of the above, the normally open contact No or the normally closed contact Nc is energized so as to keep the current without switching. Further, the blower 10 is connected to one pole of the power source 16 and the fixed contact O.

The operation of the air conditioning ventilation fan with the above configuration will be described below.

FIG. 1 shows a state in which the shutter 7 blocks the air supply port 11 and the exhaust port 12, and in this state, when the operation switch 15 is set to the state in which the movable contact A and the fixed contact O are connected, the blower 10 The micro switch 5 is energized to start the operation, and at the same time, the micro switch 5 is actuated because the operation lever 5a is pressed by the large diameter semicircle 3a of the cam, and the gear motor 2 is energized. At this time, the timer 6 starts to be biased during the time when the cam 3 rotates counterclockwise. Then, the output shaft 2a of the gear motor 2 rotates in the direction of arrow R shown in FIG. 3 (a view seen from the front side), and the crank 4 also rotates. When the crank 4 rotates, the engaging protrusion 4a provided at the tip moves in the groove 13 of the shutter 7 from the center to the bottom and from the bottom to the center to move the shutter 7 to the left in FIG. Let By this movement, the exhaust port 12 that has been closed by the shutter 7 is opened, and the opening 14 provided in the shutter 7 and the air supply port 11 are aligned with each other, and the air supply port 11 is opened. When the shutter 7 moves to a position where both the air supply port 11 and the exhaust port 12 are opened, the cam 3 makes a half rotation, and the stepped portion comes to the position of the micro switch 5, and the pressing of the operation lever 5a is released. The normally open contact No is switched to the non-conductive state, and the normally closed contact Nc is switched to the conductive state, the gear motor 2 is cut off, and the movement of the shutter 7 is stopped. During the opening operation of the shutter 7, the operation switch 15
Even if the movable contact A is connected to the fixed contact S by switching, the timer 6 maintains the conduction state to the normally open contact No. until the shutter 7 opening operation is completed, that is, until the cam 3 makes a half rotation. , The connection with the power supply 16 does not switch to the normally closed contact Nc side. Therefore, the shutter 7 does not stop in the middle of the opening operation and remain in the half-open state.

On the other hand, when the operation switch 15 is switched so that the movable contact A is connected to the fixed contact S in the open state of the air supply port 11 and the exhaust port 12 in FIG. 2, that is, in the operating state of the air conditioning ventilation fan, the blower 10 is cut off. At the same time, the gear motor 2 is energized and starts rotating through the normally closed contact Nc which is in a conducting state at this time. And the output shaft 2a of the gear motor 2
Rotates in the direction of arrow R, the crank 4 rotates, and the engaging protrusion
4a moves in the groove 13 from the central part to the upper part and from the upper part to the central part, and moves the shutter 7 to the right in FIG.
Then, when the shutter 7 moves to a position where it completely closes the air supply port 11 and the air exhaust port 12 and closes it, the cam 3 makes a half rotation, and the large-diameter semicircle 3a on the opposite side of the step portion comes, The operation lever 5a of the micro switch 5 is pressed to operate to switch the conduction from the normally closed contact Nc to the normally open contact No, and the power supply to the gear motor 2 is cut off. As a result, the gear motor 2 is stopped and the movement of the shutter 7 is stopped. The timer 6 keeps the operation switch 15 in operation while the shutter 7 is being closed.
Even if the switching is performed, the conduction state to the normally closed contact Nc is maintained, so that the shutter 7 does not stop in the middle of the closing operation and remain in the half-open state.

As described above, according to the present embodiment, the shutter 7 can electrically open and close both the air supply port 11 and the exhaust port 12 of the air conditioning ventilation fan main body 8 by the switch 1 simultaneously with the operation. 7 does not forget to close and stop, or forget to open to operate, and the shutter 7 does not remain in a half-open state during opening or closing operation, so that normal ventilation is always maintained. Further, even if a sensor or the like is provided in the air conditioning ventilation fan and the automatic operation is performed, it is not necessary to open and close the shutter 7 by hand each time, and the automatic ventilation operation can be fully performed.

EFFECTS OF THE INVENTION As is apparent from the above embodiments, according to the present invention, it is possible to electrically open and close the flat-plate shutter, which has conventionally been slid and opened manually by a switch, and to install a sensor or the like in the air conditioning ventilation fan. Even if it is installed and automatically operated, the shutter does not have to be opened and closed manually each time, and it can be opened and closed automatically, so you will never forget or forget to close the shutter, and the shutter opens or closes. There is no longer a half-open state inside,
The effect of being able to always perform normal ventilation is obtained.

[Brief description of drawings]

FIG. 1 is a rear view showing a state where a shutter of an air conditioning ventilator according to an embodiment of the present invention is closed, FIG. 2 is a rear view showing a state where the shutter is open, and FIG. 3 is an electric circuit diagram of the air conditioning ventilator. , 4th
The figure is a rear view showing a state where the shutter of the conventional air conditioning ventilation fan is closed. 1 ... Switch, 2 ... Gear motor, 2a ... Output shaft, 3 ...
… Cam, 3a …… Large diameter semicircle, 3b …… Small diameter semicircle, 4 …… Crank, 4a …… Engagement protrusion, 5 …… Micro switch, 6 ...
… Timer, 7 …… Shutter, 8 …… Air conditioning ventilation fan body,
9 ... recess, 11 ... inlet, 12 ... exhaust, 13 ... groove,
15 ... Operation switch, A ... Movable contact, C ... Common contact, No ... Normally open contact, Nc ... Normally closed contact, O, S ... Fixed contact

Claims (1)

[Claims] 1. A drive terminal 2b for one pole of a power supply 16
An operating switch 15 having a gear motor 2 to which is connected, a movable contact A connected to the other pole of the power source 16 and two fixed contacts O and S which are switchably connected to the movable contact A.
Of the normally open contact No. connected to the fixed contact O, the normally closed contact Nc connected to the fixed contact S, and the gear motor 2.
Of the micromotor 5 having a common contact C connected to the other drive terminal 2c of
Is fixed to the normally open contact every half rotation of the output shaft 2a.
No. 3 and the cam 3 for switching the conduction state of the normally closed contact Nc, the crank 4 fixed to the output shaft 2a, the mounting direction is determined corresponding to the position of the cam 3 for operating the micro switch 5, and the operation switch. The normally open contact No. is connected between 15 and the micro switch 5, and even when the movable contact A is switched during the half rotation of the cam 3.
Alternatively, the switch 1 including the timer 6 for holding the current to the normally closed contact Nc is provided in the air conditioning ventilation fan main body 8, and
The exhaust port 12 and the air supply port 11 formed in the air conditioning ventilation fan body 8
Is provided with a flat plate shutter 7 that reciprocates on a plane and opens and closes together, and an engaging protrusion 4a provided at the tip of the crank 4 is provided in a groove 13 provided in the shutter 7 in a direction intersecting the moving direction thereof. An air-conditioning ventilation fan provided with a blower 10 connected to one pole of the power source 16 and the fixed contact O so as to be movably engaged.