JPS6110099Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operation control device for a ventilation fan equipped with a timer.

Conventionally, for example, to control ventilation fans used in toilets,
An indirect heater type bimetal switch is installed as a timer, and when the manual switch is turned on to start ventilation operation, the indirect heater is energized and generates heat, which closes the bimetal switch and sets it to the set state. After the bimetal switch is turned off, the ventilation operation is continued until the bimetal switch cools down and returns to the open state, thereby discharging the residual odor. However, in such a configuration, after the user turns on the manual switch, it takes a certain amount of time for the bimetallic switch to reach the set state in which it is closed by the heat from the indirect heater, so the manual switch is short-lived. When the fan is turned on and off at different times, the bimetallic switch may not be set and the ventilation operation may not continue. After turning off the manual switch, the user must check whether the ventilation operation continues, and if it does not continue, turn the manual switch on and off again, and if the ventilation fan is installed in the ventilation duct. If this cannot be visually observed from the toilet, the user should wait a relatively long time after turning on the manual switch, regardless of how long the toilet is in use, and anticipate that the bimetal switch will be in the set state before turning on the manual switch. I had to turn it off.

The present invention was developed in view of the above circumstances, and its purpose is to make it possible to confirm the setting of the timer on the display, and to ensure that the ventilation operation continues for a certain period of time when the manual switch is turned off. To provide an operation control device for a ventilation fan which allows the operator to operate a manual switch again or spends no more than necessary waiting time.

A first embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 denotes an AC power supply, to which an AC bus 2 is connected to one output end, and an AC bus 3 to the other output end, and the AC bus 2 is connected to a movable contact piece 5 of a rotary switch 4, which is a manual switch. It is connected. The rotary switch 4 rotates between two positions, an OFF operation position and an ON operation position, and when the rotary switch 4 is turned OFF, the movable contact piece 5 moves to the first position.
The movable contact piece 5 comes into contact with the fixed contact piece 6 and the second fixed contact piece 7, and when turned on, the movable contact piece 5 comes into contact with the third fixed contact piece 8 and the fourth fixed contact piece 9. It's becoming like that. 10 is a thermal timer as a timer, which includes an indirect heater 11 and first and second bimetal switches 1 that are closed when the indirect heater 11 is energized and generates heat.
It consists of 2, 13. The third fixed contact piece 8 is connected to the AC bus bar 3 via a drive motor 14 that rotates the blower blades of a ventilation fan (not shown).
The second fixed contact piece 7 is connected to the first bimetal switch 1
2 to a common connection point between the third fixed contact piece 8 and the drive motor 14, and the fourth fixed contact piece 9 is branched into two, one end of which is connected to the second bimetal switch 13, which serves as an indicator. It is connected to the AC bus 3 via a neon lamp 15 and a protective resistor 16, and the other end is connected to the AC bus 3 via an indirect heater 11. In the above case, rotary switch 4
is installed near the entrance of the toilet, the ventilation fan is installed in the ventilation opening of the toilet or in the ventilation duct communicating with the toilet, and the thermal timer 10 is installed in the ventilation fan or near the ventilation fan.

Next, the operation of this embodiment with the above configuration will be described. First, when the user turns on the rotary switch 4 when using the toilet, the movable contact piece 5 contacts the fixed contact pieces 8 and 9, and is driven via the movable contact piece 5 and the third fixed contact piece 8. An energizing circuit for the motor 14 is formed and ventilation operation is started, and at the same time, an energizing circuit for the indirect heater 11 is formed via the movable contact piece 5 and the fourth fixed contact piece 9, and the indirect heater 11 generates heat. to heat the bimetal switches 12 and 13. Then, after a short period of time has elapsed, the bimetal switches 12 and 13 close and close the thermal timer 10.
is in the set state, and the neon lamp 15 is turned on by forming an energizing circuit through the second bimetal switch 13, thereby indicating that the thermal timer 10 has been set. Thereafter, when the user turns off the rotary switch 4 after using the toilet, the movable contact piece 5 dissociates from the fixed contact pieces 8 and 9 and comes into contact with the fixed contact pieces 6 and 7. , a new energizing circuit for the drive motor 14 is formed via the second fixed contact piece 7 and the first bimetal switch 12, and the ventilation operation is continued. or,
Fixed contact piece 8 of movable contact piece 5 of rotary switch 4,
9, the neon lamp 15 is cut off, and the indirect heater 11 is cut off, so that the bimetal switches 12 and 13 are naturally cooled, and the thermal timer 10 starts its time-limited timing operation. Start. Furthermore, after a certain period of time has elapsed, the bimetal switches 12 and 13 return to the open state, the thermal timer 10 enters the reset state, and the opening of the first bimetal switch 12 cuts off the power to the drive motor 14 and stops the ventilation operation. be done. As a result, the drive motor 14 is energized to carry out ventilation operation while the rotary switch 4 is on and while the thermal timer 10 is operating to measure time after the rotary switch 4 is turned off.

As described above, according to the present embodiment, on condition that the thermal timer 10 is set after the rotary switch 4 is turned on, the neon lamp 15 is energized via the second bimetal switch 13 to be turned on. Therefore, the user can surely know that the thermal timer 10 has been set, and therefore, the ventilation operation can be continued for a certain period of time after turning off the rotary switch 4. This allows for sufficient ventilation operation, and unlike conventional methods, it is possible to operate the rotary switch 4 on and off again, or to predict the time when the thermal timer 10 will be set, thereby eliminating unnecessary ventilation. There is no need to spend waiting time.

FIG. 2 shows a second embodiment of the present invention, and the same parts as in the first embodiment will be described with the same reference numerals. The difference from the previous embodiment lies in the configuration in which a series circuit of a second bimetal switch 13, a neon lamp 15, and a protective resistor 16 is connected in parallel to the drive motor 14. According to this configuration, the rotary switch 4 is turned off. Even while the ventilation operation continues after the operation, the neon lamp 15 is energized and lights up.

FIGS. 3 and 4 show a third embodiment of the present invention, and the same parts as in the first embodiment will be described with the same reference numerals. That is, 17 is a timer motor type timer as a timer used in place of the thermal timer 10, and this timer is composed of a timer motor 18 and cam switches 19 to 21 that are opened and closed according to the rotation of the timer motor 18. The cam switches 19 to 21 are constituted by changeover switches having a movable contact piece c and fixed contact pieces a and b. Thus, the first fixed contact piece 6 of the rotary switch 4 is connected to the contact pieces a-c of the cam switch 19.
The second fixed contact piece 7 is connected to the AC bus line 3 via the contact pieces a-c of the cam switch 20 and the timer motor 18, and the third fixed contact piece 7 The contact piece 8 is connected to a common connection point between the drive motor 14 and the movable contact piece c of the cam switch 19, and the fourth fixed contact piece 9 is branched into two, one end of which is connected to the fixed contact piece b of the cam switch 20. At the same time, the other end is connected to the AC bus 3 via the contact pieces a and c of the cam switch 21, the neon lamp 15, and the protective resistor 16.

Now, to describe the operation of the third embodiment described above, the timer 17 is switched open and closed as shown by the diagonal line in the time chart of FIG.
First, when you turn on rotary switch 4, the time
t ₀ ), the drive motor 14 is energized via the movable contact piece 5 and the third fixed contact piece 8 to start ventilation operation, and at the same time the movable contact piece 5, the fourth fixed contact piece 9 and the cam switch 20 are closed. The timer motor 18 is energized via the portion b and c, and the timer 17 starts timing operation. Then, after a short period of time (time
t ₁ ), the cam switches 19 to 21 open the contact pieces c and b and close the contact pieces c and a, and the timer 17 comes to be set and the contact pieces c of the cam switch 20 are opened. -b is opened, the timer motor 18 is cut off and the cam switch 21 is turned off.
The neon lamp 15 is energized and lit by closing between the contacts c and a. After that, when the rotary switch 4 is turned off (time t ₂ ), the rotary switch 4
When the movable contact piece 5 dissociates from the fixed contact pieces 8 and 9, the neon lamp 15 is cut off and the drive motor 14 is also cut off, but instead, the movable contact piece 5 and the first fixed contact piece The drive motor 14 is now energized again via the contact piece 6 and the contact pieces a-c of the cam switch 19, and the movable contact piece 5, the second fixed contact piece 7, and the contact pieces a-c of the cam switch 20
The timer motor 18 is now energized through the period c, and the timer motor type timer 17 resumes timekeeping operation. Thereafter, when the timer 17 finishes counting the set period of time (for example, 5 minutes), the cam switches 19 to 21 of the timer motor type timer 17 open the contact pieces c and a, and open the contact pieces c and b. It is reset to close, so that the drive motor 14 and timer motor 18 are de-energized and the ventilation operation is stopped. Therefore, this third embodiment also provides the same effects as the first embodiment.

If the series circuit of the neon lamp 15 and the protective resistor 16 is connected in parallel with the drive motor 14 between the contacts a and c of the cam switch 21 shown in the third embodiment, the second embodiment Similarly to the example, even after the rotary switch 4 is turned off, the neon lamp 15 remains lit until the timer 17 is reset.

Further, in each of the above embodiments, the neon lamp 15 is used as the indicator, but the display is not limited to this, and for example, an incandescent lamp,
A light emitting diode or the like may also be used.

Further, in each of the above embodiments, the rotary switch 4 is used as the manual switch, but the manual switch is not limited to this, and for example, a seesaw switch or a push button switch may be used.

Furthermore, in the above embodiment, a thermal timer 10 and a timer motor timer 17 are used as the timer.
However, the present invention is not limited to this, and it is also possible to use an electronic circuit or the like.

In addition, the present invention is not limited to ventilation fans used in toilets, but can also be applied to ventilation fans used in kitchens, for example, and may be modified as appropriate without departing from the gist of the invention. be.

As explained above, in the present invention, the setting of the timer can be confirmed by the display, and therefore, when the manual switch is turned off, the ventilation operation can be reliably continued for a certain period of time, and when the manual switch is turned off, or when the manual switch is turned off. It is possible to provide an operation control device for a ventilation fan that does not require unnecessary standby time.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram showing a first embodiment of the invention, Fig. 2 is an electrical circuit diagram showing a second embodiment of the invention, and Fig. 3 is a third embodiment of the invention. The electric circuit diagram and FIG. 4 are time charts for explaining the operation of the same embodiment. In the drawing, 4 is a rotary switch (manual switch 5), 10 is a thermal timer (timer), 14 is a drive motor, 15 is a neon lamp (indicator), 1
7 indicates a timer motor type timer (time limit device).

Claims (1)

[Scope of utility model registration request] A manual switch that is operated on and off, a timer that is set after a short time based on the on operation of the manual switch, then performs a timed operation based on the off operation of the manual switch, and is reset after a certain period of time; Operation of a ventilation fan comprising: a drive motor that is energized to rotate a blower blade when the timer is on and a timer is running; and a display that is energized and lights up on the condition that the timer is set. Control device.