JPS6032503Y2 - Ventilation fan operation control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operation control device for a ventilation fan that allows ventilation operation to be performed for a certain period of time after turning off a manual switch.

Conventional ventilation fans of this type, for example, ventilation fans in toilets, include a manual switch that is attached to the room wall and has first and second switches that open and close in conjunction with each other, and an indirect heater that is built into the ventilation fan and the There is a thermal relay that has a bimetallic switch that is closed by the heat generated by the heater.
An electric line that energizes the indirect heater via the second switch, an electric line that energizes the drive motor via the bimetal switch after the manual switch is turned off, and a common electric line that is commonly connected to the indirect heater and the drive motor. The circuit consists of four electrical circuits, and there are four electrical circuits to connect, which not only makes the wiring work troublesome, but also requires the use of an expensive manual switch with two interlocking switches. There was a problem that had to be done.

This invention was developed in view of the above circumstances, and its purpose is to simplify the wiring work by reducing the number of electrical circuits to be connected to three. To provide an operation control device for a ventilation fan that does not require the use of an interlocking type device.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a ventilation fan attached to a ventilation opening (none of which is shown) in a toilet, and it has a fan 2 and a drive motor 3 in the form of a shaded coil for rotating the fan 2. One end of a motor coil 4 of this drive motor 3 A tap 5 is led out from the section, thereby dividing the motor coil 4 into a main coil 4a and an auxiliary coil 4b serving as an impedance element.

6 is a thermal timer built into the ventilation fan 1, which is composed of a positive temperature coefficient thermistor 7 and a positive coefficient thermistor 7.
The bimetallic switch 8 is a thermal switch that closes after a predetermined period of time due to heat generated by the bimetallic switch 8.

Reference numerals 9 and 10 are manual switches that are operated on and off independently, and these are attached to the wall of the room near the entrance of the toilet.

Reference numerals 11 and 12 are power supply terminals connected to an AC power supply, and one power supply terminal 11 is branched into three branches, the first branch end of which is connected to the manual switch 9, the first electric circuit A, and the positive temperature coefficient thermistor. 7 to the tap 5 of the drive motor 3, and the second branch end is connected to the auxiliary coil 4b of the drive motor 3 via the second electric line B and the bimetal switch 8. The branch end is connected to the other power terminal 12 via the manual switch 10 and an illumination lamp 13 provided on the ceiling of the toilet.

The main coil 4a of the drive motor 3 is connected to the power supply terminal 12 via a third electric path C.

Next, the operation of this embodiment with the above configuration will be described.

First, when the user uses the toilet, press the manual switch 9.
, 10 is turned on, the manual switch 9. A first energizing path 14 is formed through which the main coil 4a of the drive motor 3 is energized via the positive characteristic thermistor 7 and the tap 5, and the drive motor 3 rotates the fan 2, thereby starting ventilation operation. At the same time, the lamp 1 is turned on via the manual switch 10.
3 is energized to illuminate the inside of the toilet.

At this time, when the positive temperature coefficient thermistor 7 is energized, it generates heat, its temperature rises, and its own resistance value increases.
In particular, the positive temperature coefficient thermistor 7 in this embodiment is designed to maintain a maximum temperature of about 180° C. after the self-heating temperature rises, and at this time 10~IC! The resistance value is set to approximately Ω.

Then, the bimetallic switch 8 is heated by the heat generated by the positive temperature coefficient thermistor 7 and closes after a predetermined time, and the drive motor 3
The second coil 4a is energized via the auxiliary coil 4b.
A current conducting path 15 is formed.

In this case, when the bimetallic switch 8 is closed, a bypass circuit is formed by the bimetallic switch 8 and the auxiliary coil 4b in series circuit with respect to the series circuit of the manual switch 9 and the positive temperature coefficient thermistough. Therefore, a potential difference is generated between both terminals of the auxiliary coil 4b, and a small current flows through the PTC thermistor 7 due to the potential difference, so that the temperature of the PTC thermistor 7 does not drop much.
The bimetal switch 8 continues to close.

Then, after using the toilet, the user manually switches 9.10.
When turned off, the positive temperature coefficient thermistor and the bimetallic switch 8 are naturally cooled, and the ventilation operation continues for a certain period of time until the bimetallic switch 8 is opened by natural cooling.

In this way, according to the present embodiment, when the manual switch 9 is turned on, the first electric path A is connected to the main coil 4a of the drive motor 3 through the positive temperature coefficient thermistor 7 and the tap 5, and the bimetal switch 8 and the impedance element. A circuit configuration in which three electrical circuits are led out from the ventilation fan 1: a second electrical circuit B that energizes the main coil 4a via the auxiliary coil 4b, and a third electrical circuit C that connects the main coil 4a to the power terminal 12. Therefore, the wiring work for the ventilation fan 1 is easier than in the past, and as described above, the tap 5 of the drive motor 3 is energized via the positive temperature coefficient thermistor 7 which acts as an indirect heater for the bimetal switch 8. This eliminates the need for a dedicated manual switch for energizing the PTC thermistor 7, and for the manual switch 9, a conventional interlocking type switch is not required and an inexpensive one can be used.

Furthermore, according to this embodiment, the lamp 13 is turned on and off by the manual switch 10 that is opened and closed independently of the manual switch 9, so that only the lamp 13 is used for illumination when ventilation operation is not required. It is convenient to use.

In the above embodiment, the auxiliary coil 4b, which is a part of the motor coil 4, is used as the impedance element, but the impedance element is not limited thereto, and a resistive element or the like may be used.

Further, although the manual switches 9 and 10 were provided in the above embodiment, the manual switch 10 was omitted and a lamp 13 was used instead.
may be connected between electric lines A and C.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be modified as appropriate without departing from the gist, such as being applicable to ventilation fans in general, not limited to ventilation fans used only in toilets. Of course, it can be implemented by doing so.

As explained above, this invention can simplify the wiring work by reducing the number of electrical circuits to be connected to three, and uses an expensive interlocking type manual switch for ventilation operation. An unnecessary ventilation fan operation control device can be provided.

[Brief explanation of the drawing]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. In the drawing, 1 is a ventilation fan, 2 is a fan, 3 is a drive motor, 4
is the motor coil, 4a is the main coil, and 4b is the auxiliary coil (
7 is a positive characteristic thermistor, 8 is a bimetal switch (thermal switch), 9 is a manual switch, and 14 and 15 are first and second energizing paths.

Claims (1)

[Scope of utility model registration request] a manual switch that is operated on and off; a drive motor that rotates the fan; a positive temperature coefficient thermistor that forms a first energization path for the drive motor when the manual switch is turned on; An operation control device for a ventilation fan, comprising: a thermal switch that is activated after a predetermined time to form a second energizing path for the drive motor; and an impedance element interposed in the second energizing path.