JPS63150541A - Controller of roof ventilation fan - Google Patents

Abstract

PURPOSE:To make it unnecessary to prepare a plurality of motors for opening or closing a damper by providing a power supply device by being supplied with an AC current and outputting a DC current having a predetermined voltage, and actuating a DC motor provided in a drive mechanism by the AC current. CONSTITUTION:In actuating the roof ventilation fan, an opening and closing switch 32 of a power operating part 3 is turned on. In this case, AC voltages from a voltage power source 1 are supplied to a switching regulator 19 through external terminals 14 and 15 of the power operating part 3 and external terminals 17 and 18 of a controller 16. Regardless of how the AC voltages are, the AC voltages are all converted collectively into a 24V DC voltage. The DC voltage thus obtained is supplied to a DC motor 23 through a full-opening detection switch 20 and A-shaped contacts 22 and 34. The DC motor 23 is rotated and actuated and the damper carries out its opening action. In a case where the damper reaches a fully opened position, the fully-opening detection switch 20 is opened and the voltage supply to the DC motor is stopped, and hence the rotation and drive of the DC motor 23 are stopped.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for a rooftop ventilation fan, and particularly to a control device for a rooftop ventilation fan that is equipped with a drive mechanism that moves up and down a covering member that covers a ventilator opening. Concerning improvements to equipment.

[Conventional technology]

Conventionally, such rooftop ventilation fans include, for example, the one shown in FIG. 2.

That is, an AC motor 38 is disposed within the ventilator opening 37, and a fan 39 is attached to the AC motor 38 and driven to rotate. These AC motor 38 and fan 39 are held and fixed by a support frame 41 to a ventilator main body pedestal 40 that forms the ventilator opening 37, and the hood 42 is fixed to a flange 44 of the ventilator main body pedestal 40 by a fixing member 43. It is fixedly installed. A damper 45 serving as a covering member covering the ventilator opening 37 is moved up and down by a drive mechanism 46.

This drive mechanism 46 includes a cylindrical lifting member 47 and a motor 53 installed inside the cylindrical lifting member 47. A threaded groove 48 is carved on the outer peripheral surface of the cylindrical lifting member 47, and a hole is formed in the center of the damper 45, and a threaded groove 49 is similarly formed on the periphery of the hole. The damper 45 is screwed into a cylindrical elevating member 47.

When opening the damper 45, the cylindrical elevating member 47 is rotated by driving the motor 53 built into the cylindrical elevating member 47, and the damper 45 is raised along the thread groove 48 of the cylindrical elevating member 47. Then, the fully open position is detected by the fully open position detection switch 50 and the driving of the motor is stopped. On the other hand, when closing the damper 45, the motor 53 is reversely rotated to reverse the cylindrical elevating member 47 and lower the damper 45 along the thread groove 48, and the fully closed position detection switch 51 is activated to the fully open position. is configured to detect this and stop the drive of the motor (see, for example, Japanese Utility Model Application Publication No. 185527/1983).

[Problems with the prior art] - However, in such a conventional rooftop ventilation fan 52, the voltage specification of the motor that drives the fan varies depending on the fan diameter of the ventilation fan, and for example, when driving a small fan, This uses an AC 100V voltage power source, and when driving a medium-sized or larger fan, an AC 200V voltage power source is used.

Therefore, the motor 53 for opening and closing the damper 9 may also be a 100V AC motor or an AC 20V motor, depending on the voltage specifications.
It is necessary to prepare two types of motors for 0V, which has the drawback of increasing manufacturing costs.

Therefore, a technical object of the present invention is to reduce the manufacturing cost of a rooftop ventilation fan.

[Technical means and actions for solving the problems] In order to solve such technical problems, the present invention has the following features:
The motion mechanism is equipped with a DC motor and a power supply device that inputs an AC current of an arbitrary voltage value from a voltage power source and outputs a DC current of a constant voltage. It is configured to drive the DC motor.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 shows a circuit of a control device for a rooftop ventilation fan according to one embodiment. Reference numeral 1 indicates a three-phase alternating current voltage power supply of 100 VAC or 200 VAC, and the voltage power supply 1 is connected to three power supply side external terminals 4 of the power operation section 3, respectively. The three internal electric circuits of the power operation section 3 have A-type contacts 10a and 10b, respectively, which close when the excitation coil 6 is excited.
.

A motor 8 for driving a fan of the rooftop ventilation fan is connected to an external terminal 9 on the non-power side of the power operation unit 3. In addition, the symbols 11a and ll in Figure 1
b, llc are the power supply side terminal 4 of the power operation unit 3 and the relay 7
A circuit breaker is installed in each internal electric circuit between the

Also, between the non-power side terminal of circuit breaker llb and the power side terminal of A type contact 10b and the external terminal 14, and between the non-power side terminal of circuit breaker 11c and A
Electrical path between the power supply side terminal of the contact 10c and the external terminal 15
An electric path is provided between the two. Furthermore, a fuse 2 is provided in the electrical path between the circuit breaker llb and the external terminal 14.

The external terminals 14.15 of the power operation section 3 and the external terminals 17.18 of the drive mechanism control device 16 are connected, and these external terminals 17.18 are connected to the switching regulator 19 as a power supply device. connected to the input side of the This switching regulator 19 is 85V
If an AC voltage between ~264v is input,
It is configured so that it can be converted all at once to a direct voltage of 24V and output. The 24V terminal 29 provided on the output side of the switching regulator 19 is connected to the power supply terminal of the full open detection switch 20, and the non-power supply terminal of the full open detection switch 20 is connected to the excitation coil 21 of the relay 25. When the DC motor 2
Connected to 3. Furthermore, the 24V terminal 29 of the switching regulator 19 is connected to the fully open detection switch 20.
The non-power side terminal of the fully closed detection switch 24 is connected to a B-type contact 26 that opens when the excitation coil 21 of the relay 25 is excited. is connected to the power supply side terminal of the B type contact 2.
The non-power supply side terminal 6 is connected to the DC motor 23.

Further, the Ov terminal 28 of the switching regulator 19 is connected to the power supply side terminals of the A type contact 34 and the B type contact 54, and the non-power supply side terminals of the A type contact 34 and the B type contact 54 are
Both are connected to a DC motor 23. Furthermore, this D
The C motor 23 opens and closes the damper.

Further, the 24V terminal 29 of the switching regulator 19 is connected to the power supply side terminal of the excitation coil 21 of the relay 25, and the non-power supply side terminal of the excitation coil 21 is connected to the control device 16.
It is connected to the external terminal 27 of. Further, the O port terminal 28 of the switching regulator 19 is connected to the control device 1.
6, and this external terminal 30 is connected to an external terminal 31 provided on the power operation section 3.

Further, an on/off switch 32 for controlling voltage supply to the excitation coil 21 is provided in the electric path between the external terminal 31 and other external terminals 33, and the power supply side terminal of the on/off switch 32 is connected to the external terminal 33. 31, and the non-power supply side terminal of the open/close switch is connected to another external terminal 33, and this external terminal 33 and the external terminal 27 of the control device 16 are connected. Further, reference numeral 35 in the figure is an interlocking switch that is provided in an electric circuit whose one end is connected to the input side of the switching regulator 19 and the other end is connected to the external terminal 55, and which is interlocked with the fully open detection switch 20. On the other hand, the power supply side terminal of the excitation coil 6 is connected between the circuit breaker llb and the A-type contact 10b, and the non-power supply side terminal of the excitation coil 6 is connected to the power supply side terminal of the switch 36. This switch is a switch that rotates the fan 8 when the damper is fully open, and the switch 3
The non-power supply side terminal 6 is connected to an external terminal 55 of the control device 16 via an external terminal 56 of the power operation section 3 .

A case will be described in which the rooftop ventilation fan control device 16 configured as described above is used to fully open the damper and operate the rooftop ventilation fan. In this case, since the damper is assumed to be in a fully closed state, the fully open detection switch 20 is in a closed state. When operating the rooftop ventilation fan, first, the open/close switch 32 of the power operation section 3 is turned on. In this case, the main piezoelectric r? , 1 is supplied to a switching regulator 19 via an external terminal 14 and an external terminal 15 of the power operation section 3 and an external terminal 17 and an external terminal 18 of the control device 16. Regardless of whether it is an AC voltage or a 200V AC voltage, it is all converted into a 24V DC voltage at once. And this switching regulator 19
The 24V DC voltage output from the relay 25 is supplied to the excitation coil 21 of the relay 25, the excitation coil is excited, the A-type contact 22.34 is closed, and the 24V terminal 29 of the switching regulator 19 is sent to the full-open detection switch 20. A circuit leading to the OV terminal 28 via the DC motor 23 is closed.

Therefore, the DC voltage from the switching regulator 19 is supplied to the DC motor 23 via the fully open detection switch 20 and the A-type contacts 22, 34, and the DC motor 23 is driven to rotate, thereby opening the damper. When the damper reaches the fully open position, the fully open detection switch 20
is opened, the voltage supply to the DC motor 23 is stopped, and the rotational drive of the DC motor 23 is stopped. In this case, the interlocking switch 35 is closed in conjunction with the fully open detection switch 20.

Further, by closing the switch 36 of the power operation unit 3, the voltage power source 1 is connected to the interlocking switch 35 via the external terminal 15 of the power operation unit 3 and the external terminal 18 of the control device Fa16, and further, the external The circuit leading to the excitation coil 6 via the terminal 55 and the external terminal 56 via the switch 36 is closed, and the AC voltage from the voltage power supply 1 is transferred to the excitation coil 6.
The excitation coil 6 is excited. Then, due to the excitation of the excitation coil 6, the A-type contacts 10a, 1Ob, 1
oc are all closed, and a circuit for supplying alternating current voltage to the motor 8 that rotates the fan of the rooftop ventilation fan is closed, and the motor 8 is driven to rotate and the fan rotates.

In addition, when stopping the rotation of the fan, the power operation section 3
Open the on/off switch 32. As a result, the excitation coil 21
The voltage supply to B stops, and the excitation coil 21 is not excited.
The shaped contact 26.54 is closed. In this case, since the fully closed detection switch 24 is closed at the time when the damper starts its opening operation, DC voltage is supplied to the DC motor 23 via the B-type contact 26.54, and the circuit rotates the DC motor 23 in the reverse direction. is closed. As a result, the DC motor 23 rotates in the reverse direction, the damper descends from the fully open position, and at the same time the fully open detection switch 20 closes, the associated switch 35 opens, and the excitation coil of the relay 7 of the power operating section 3 opens. 6 is blocked and the ventilation fan stops. Then, the damper eventually reaches the fully open position, and the fully closed detection switch 24 opens to stop the damper.6 In this embodiment, a switching regulator 19 is connected to the control circuit, and the AC voltage of 100 V or 2
Regardless of the AC voltage of 00V, it can be converted into a DC voltage of 24V all at once. Therefore, the same DC motor can be used regardless of the voltage specifications, which differ depending on the diameter of the fan used as a ventilation fan.

〔Effect of the invention〕

As described above, the present invention is provided with a power supply device that converts an alternating current of an arbitrary voltage value inputted from a voltage power source into a direct current of a constant voltage and outputs the same.
Even if the voltage specification of the motor driving the fan differs depending on the diameter of the fan used as a ventilation fan, there is no need to prepare multiple motors to open and close the damper, reducing manufacturing costs. This has the effect of making it possible to

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram used in a control device for a rooftop ventilation fan according to the present invention, and FIG. 2 is an overall explanatory diagram showing the structure of a conventional rooftop ventilation fan. 1... Voltage power supply 8... Motor (AC motor) 16... Control device 19... Power supply equipment (switching regulator) 23
... DC motor 37 ... Ventilator opening 39 ... Fan 45 ... Covering member (damper) 46 ... Drive mechanism patent applicant Sanyo Industries Co., Ltd. Representative Patent attorney Akira Shihashi fE2I! 1

Claims (3)

[Claims] (1) An AC motor disposed inside the ventilator opening, a fan rotationally driven by the AC motor, a covering member that covers the ventilator opening, and a drive mechanism that opens and closes the covering member. In a control device for a rooftop ventilation fan, which drives the AC motor and operates the drive mechanism by supplying voltage from an AC power supply, the drive mechanism is provided with a DC motor and receives an arbitrary voltage from the voltage power supply. A control device for a rooftop ventilation fan, characterized in that a power supply device is provided which inputs an alternating current of a certain value and outputs a direct current of a constant voltage, and the direct current motor is driven by the direct current output from the power supply device. . (2) The control device for a rooftop ventilation fan according to claim 1, wherein the power supply device inputs an AC voltage of 85V to 264V and outputs a DC voltage of 24V. (3) The control device for a rooftop ventilation fan according to claim 1, wherein the power supply device comprises a switching regulator.