JPS6122202Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a ventilation fan that is equipped with an auxiliary motor that opens a shutter in addition to a drive motor that drives an impeller.

This type of ventilation fan described above has conventionally been constructed as shown in FIG. 1 and Japanese Utility Model Publication No. 7723/1983, for example. That is, an auxiliary motor 101 that opens the shutter is connected in parallel to a power source via a switch 102 that is opened when the shutter is opened, and an electromagnet that connects and releases a clutch incorporated in a coupling mechanism between the auxiliary motor 101 and the shutter. 1
03, and a drive motor 104 that drives the impeller.
are connected directly in parallel to the power supply. Therefore, the opening of the shutter and the rotation of the impeller are performed in parallel, and the opening of the shutter and the rotation of the impeller are performed independently of each other. However, even if this causes trouble with the shutter and the shutter does not open properly, the impeller may rotate meaninglessly.

The present invention aims to solve the above-mentioned conventional inconveniences by making it possible to link the opening movement of the shutter with the operation of the drive motor that drives the impeller, and also to provide an alarm system that notifies ventilation problems. To provide a ventilation fan that can be easily incorporated.

Next, the configuration of the present invention will be specifically explained based on an embodiment shown in the drawings.

The ventilation fan as an application example of the present invention is similar in appearance to a normal ventilation fan with a shutter. The shutter is pivoted when the outdoor opening of the frame is operated, and is opened by rotation of the operating shaft. The operating axis is
It is connected to the output shaft of the auxiliary motor 1 via a reduction gear train. A clutch mechanism is incorporated between the output side and the driven shaft of the reduction gear train, and the clutch mechanism is connected when the electromagnet 2 is energized, and released when it is de-energized. If the clutch mechanism is in the connected state, the power of the auxiliary motor 1 is transmitted to the operating shaft, but if the clutch mechanism is in the unstretched state, the power of the auxiliary motor 1 is not transmitted. The electromagnet 2 that controls the state of the clutch mechanism is connected to a power source 3 as shown in FIG.
are connected directly and in parallel to each other, and are energized when the power supply 3 is turned on. Auxiliary motor 1 that drives the shutter
are common terminal 4A, normally closed contact 4B, and normally open contact 4
The switch 4 is connected in parallel to the power source 3 through the normally closed contact 4B of the switch 4, and, like the electromagnet 2, it is energized when the power source 3 is turned on. The normally closed contact 4B of the switch 4 is further connected to an alarm circuit consisting of a delay switch 5 and an alarm 6 which are connected in parallel to the auxiliary motor 1. The delay switch 5 closes when it is energized for a time slightly longer than the time from when the shutter starts opening to when it finishes opening, and the alarm 6 is connected in series to the circuit that opens and closes the shutter. Note that the alarm device 6 is specifically a device such as a buzzer or a lamp that performs an alarm operation that conveys information to the senses. A drive motor 7 for driving an impeller, which is the main body of the ventilation fan, is connected to the normally open contact 4C of the switch 4 in parallel to the power supply 3. Switch 4 is linked to the opening and closing of the shutter.
It may be a limit switch or a reed switch that detects the open state of the shutter, and has a structure that switches from the normally closed contact 4B to the normally open contact 4C when the shutter is fully opened. In addition, the auxiliary motor 1, the reduction gear train,
The clutch mechanism etc. are integrated into a single unit, and structurally constitute an auxiliary motor unit.

When the power supply 3 is turned on in the ventilation fan configured as described above, the power supply 3 is supplied to the electromagnet 2 and the auxiliary motor 1, and the auxiliary motor 1 rotates at the same time as the clutch mechanism is connected, and the shutter begins to open with the power of the auxiliary motor 1. The normally closed contact 4B of the switch 4 is closed and supplies power 3 to the auxiliary motor 1 as described above, but the delay switch 5 connected to the normally closed contact 4B of this switch 4 is The power supply 3 is also supplied to the terminal. The delay switch 5 has an alarm 6
is connected, but the circuit is open due to the delay operation of delay switch 5. When the shutter is fully opened by the drive of the auxiliary motor 1, the operating conditions for the switch 4 are satisfied and the switch 4 is operated. That is, the normally closed contact 4B is opened, and at the same time the normally open contact 4C is opened.
is closed. Therefore, the power supply 3 is cut off to the auxiliary motor 1 and the notification circuit, and the power supply 3 is supplied to the drive motor 7. As a result, the shutter is kept fully open, the active position of the alarm circuit disappears, and the impeller rotates to enter the ventilation phase. If the shutter becomes restricted due to trouble with the shutter itself, trouble with the auxiliary motor unit, or an external cause during the process of the shutter starting to open and reaching full opening, and an obstacle occurs to proper ventilation operation, the operation of switch 4 is suspended. Therefore, energization to the drive motor 7 is not started. Therefore, the auxiliary motor 1 continues to rotate and the notification circuit remains active. When the time required for the shutter to fully open has elapsed, the delay switch 5 is activated and the power 3 is supplied to the alarm 6.
The alarm device 6 initiates a notification operation. In other words, it notifies the user that there is a problem with the ventilation operation and informs the user that appropriate measures need to be taken. By turning off the power source 3 based on this notification operation, burnout of the auxiliary motor 1 due to overload can be prevented. In addition, it is possible to prevent as much as possible gas accidents caused by poor ventilation, which occur due to neglecting proper ventilation.

As is clear from the above description of the embodiments, the ventilation fan of the present invention operates the drive motor that drives the impeller on the condition that the shutter is properly opened, so the shutter cannot be opened properly. This prevents the ventilation operation from being performed while the system is in full condition, which prevents shutter problems from being overlooked.In addition, by incorporating a simple notification circuit that includes a delay switch to detect shutter opening failures,
It is also possible to easily notify troubles related to ventilation operation.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of an electric system of a ventilation fan as a conventional example, and FIG. 2 is a circuit diagram showing the configuration of an electric system of a ventilation fan as an application example of the present invention. 1...Auxiliary motor, 2...Electromagnet, 3...Power supply, 4...Switch, 4B...Normally closed contact, 4C...
... Normally open contact, 5 ... Delay switch, 6 ... Alarm, 7 ... Drive motor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Shutters and ventilation that are attached to an outdoor opening so that they can be opened and closed, are connected to an auxiliary motor via a clutch that is engaged and engaged by an electromagnet, and are opened and operated by the auxiliary motor. The drive motor that drives the impeller that forms the flow is linked to the opening and closing of the shutter, and has a normally open contact that closes when the shutter closes and closes when it opens, and a normally open contact that closes when the shutter closes and opens when the shutter closes. The electromagnet, the auxiliary motor, and the drive motor are each connected in parallel to a power source, and the switch has a normally closed contact that opens the switch. The auxiliary motor is also
A ventilation fan characterized in that each of the drive motors is connected to a power source via a normally open contact. (2) The ventilation fan according to claim 1 of the utility model registration, characterized in that an alarm is provided in parallel with the auxiliary motor via a normally closed contact of the switch and a delay switch that operates with a delay.