JP4493199B2 - Ventilation fan with timer - Google Patents

Description

[0001]
[Technical field belonging to the invention]
The present invention relates to a ventilation fan with a timer that is automatically stopped when continuously operated for a predetermined time.
[0002]
[Prior art]
A ventilation fan having a drawstring is generally configured to start when the string is pulled and then stop when the string is pulled again. This type of ventilation fan installed in the toilet or bathroom tended to run continuously for a long time. Therefore, in order to save power, a ventilation fan with a timer that automatically stops when continuously operated for a predetermined time has come to be used. Thereby, even if it is a toilet or a bathroom, the operation of the ventilation fan can be surely stopped after a predetermined time has elapsed, and power saving is also achieved.
[0003]
[Problems to be solved by the invention]
However, when the timer function is added to the function of repeatedly starting and stopping by pulling the pull string, the correspondence between the pull string operation and switching between start and stop varies, and it is difficult for the user to understand. As an example, after starting the ventilation fan by pulling the pull string, even if the user pulls the pull string to restart it in the state that the timer set time has elapsed, the start is started. After that, the engine could not be started unless the drawstring was pulled again. As another example, if the pull string is pulled before the set time of the timer elapses, the ventilation fan is forcibly stopped, and the timer interrupts the timing operation at this time. Next, when the drawstring is pulled, the ventilation fan starts, but the timer stops when the remaining time has elapsed from the interruption of the timing operation. Therefore, the operation is stopped in a shorter time than the time desired by the user.
[0004]
On the other hand, when performing an operation inspection of the ventilation fan in the manufacturing process, it may be time-consuming to determine whether the timer is functioning normally for products having the same external shape but different only the timer setting time.
[0005]
Further, as long as the drawstring switch by the drawstring is in the off state, it is impossible to check whether the timer function is normal, and the drawstring switch has to be always on.
[0006]
The present invention has been made to solve the above problems, and a first object thereof is a ventilation fan with a timer that can be started and stopped in a user-friendly state even if it has a timer function. To provide.
[0007]
The second object is to provide a ventilation fan with a timer that can facilitate product inspection.
[0008]
[Means for Solving the Problems]
The invention according to claim 1
Provided in a path for supplying power from a power source through a power supply end, a string switch having a pull string, a motor driving means for driving a blade and a microcomputer, and the motor when the motor is continuously operated for a predetermined time In a ventilation fan with a timer provided with a control unit having a timer means for stopping
The control unit includes an operation detection unit that detects that the string switch has been pulled. When the operation detection unit detects that the string has been pulled while the motor is stopped, the control unit starts the motor. The time measurement value of the timer means is started, and when the operation detection means detects that the string has been pulled during operation of the motor, the motor is stopped and the time measurement value of the timer means is When the power supply end is reset and connected to a power source, the motor is started regardless of the pulling operation of the string switch, and the time measurement value of the timer means is started, and a control means is provided. To do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the drawings. FIG. 1 is an exploded perspective view showing a configuration of a ventilation unit of an embodiment of a ventilation fan with a timer according to the present invention. In the figure, a body portion 1 having a circular opening at the center of a rectangular frame has a motor 2 attached to the back surface thereof, and blades 3 are mounted on the output shaft of the motor 2 so as to be directed to the front opening. Yes. Further, a cord 4 is led out from a control unit (not shown in FIG. 1) provided in the vicinity of the motor 2, and a power plug 5 is connected to the tip thereof. Further, the string 6 of the string switch mounted on the control unit is pulled out from the lower end so as to be pulled. A detachable cover 7 is provided on the front surface of the main body 1.
[0010]
FIG. 2 is a block circuit diagram showing a configuration of a control unit for driving the ventilation fan. Here, the control unit 10 is provided in a path for supplying power from the power source 8 such as an outlet connected to a commercial power source to the motor 2, and mainly includes a string switch 9, a driving unit 11, and a microcomputer 12. . Among these, the driving means 11 includes a switching element such as a relay whose contact is connected to the power supply path, and controls the switching element to be turned on / off by a start command or a stop command of the microcomputer 12. The microcomputer 12 operates by receiving drive power from the power supply 8 and measures the time since the power is supplied and the time since the string switch 9 is operated, and a preset time has elapsed. A time measuring means 21 for outputting a stop command for the motor 2 at a stage and an operation detecting means 22 for detecting that the string switch 9 has been operated are provided. The string switch 9 is a rotary switch, and the operation detecting means 22 monitors the open / closed state of the string switch 9.
[0011]
The operation of the present embodiment configured as described above will be described below. First, when the power plug 5 is inserted into a power source such as an outlet, the operating power is supplied to the microcomputer 12. At this time, the microcomputer 12 starts a time measuring operation by the time measuring means 21 and outputs a start command to the driving means 11. As a result, the contact 11a is turned on and the motor 2 is started. That is, the ventilation fan is operated. If the pull string 6 is not pulled in this state, the microcomputer 12 outputs a stop command to the drive means 11 when the time set in the time measuring means 21 as a timer has elapsed. As a result, the contact 11a is turned off and the motor 2 is stopped. That is, the ventilation fan stops. At this time, the time measuring means 21 stops the time measuring operation and sets the measured value to zero. That is, the timer is reset.
[0012]
On the other hand, if the pull string 6 is pulled after the power plug 5 is inserted into the outlet before the set time of the timer elapses, the state of the string switch 9 changes, and this change is detected by the operation detection means 22. At this time, as in the case where the set time of the timer has elapsed, a stop command is output to the driving means 11 to stop the ventilation fan, and further, the timer is reset.
[0013]
Next, when the pulling string 6 is pulled while the ventilation fan is stopped, the microcomputer 12 starts the time measuring operation by the time measuring means 21 at this time, just like the power plug 5 is inserted into the outlet, and the driving means. 11 outputs a start command. As a result, the ventilation fan is operated. If the pull string 6 is not pulled in this state, the microcomputer 12 outputs a stop command to the drive means 11 when the set time of the timer has elapsed. This stops the ventilation fan. At this time, the timer is reset.
[0014]
On the other hand, if the pull string 6 is pulled before the set time of the timer elapses, the state of the string switch 9 changes, and a stop command is output to the driving means 11 in the same manner as when the set time of the timer has elapsed, and the ventilation fan And the timer is reset.
[0015]
FIG. 3 is a flowchart showing a specific processing procedure of the microcomputer 12 for performing the above-described operation. If the power plug 5 is plugged into an outlet, this is identified at step 101, a timer is started at step 102, and a motor start command is output at step 103. Next, it is determined whether or not the time set in the timer has elapsed in step 104, and it is determined whether or not the drawstring has been pulled once in step 105 until the time has elapsed.
[0016]
If it is determined that the set time of the timer has elapsed, or if it is determined that the drawstring has been pulled once, the timer is reset (stopped) in step 106, and a motor stop command is output in step 107. . In step 108, it is repeatedly determined whether or not the drawstring 6 has been pulled. During this time, the motor 2 maintains a stopped state.
[0017]
Next, assuming that the drawstring 6 is pulled once in step 109, the microcomputer 12 operates a timer in step 109, and outputs a start command to the drive means 11 in step 110 to start the motor. In this state, if the pull string 6 is not pulled, it is determined in step 111 whether the set time of the timer has elapsed, and if it is determined that the set time has elapsed, the timer is reset in step 113, In step 114, a stop command is output to the drive means 11 to stop the ventilation fan.
[0018]
On the other hand, until the set time of the timer elapses, it is repeatedly checked in step 112 whether or not the drawstring 6 has been pulled once. If so, the timer is reset in step 113 and driven in step 114. A stop command is output to the means 11 to stop the ventilation fan.
[0019]
Thus, after the process of step 114 is complete | finished, the process of steps 108-114 is repeated until a power supply is interrupted | blocked. Thus, it can be seen that the same operation as described above is performed.
[0020]
As is apparent from the above description, according to the present embodiment, when the motor 2 is continuously operated for a predetermined time, the motor 2 is stopped, and further, when the pull string 6 is pulled while the motor 2 is operating. While the motor 2 is stopped, the time measurement value of the timer means is reset, and conversely, when the drawstring 6 is pulled while the motor 2 is stopped, the motor 2 is started, and has a timer function. However, the start and stop operations can be performed in a state that is easy for the user to understand.
[0021]
Further, according to the present embodiment, since the operation by the timer is started from the time when the power is turned on, there is also an effect that the product inspection can be performed without intentionally pulling the pull string 6.
[0022]
In the above embodiment, the timer is started at the same time as the power is turned on. However, when the external shape is the same and the model is different, for example, when the set time of the timer is different depending on the application, the model is determined at the initial stage of inspection. It is convenient to be able to.
[0023]
As one of the methods, if the time from when the power is turned on until the motor actually operates is changed depending on the model, the inspector can have prior knowledge due to the time difference, so the inspection time can be reduced. Further shortening is possible. As a specific example, the rotation of the motor and the start of timer operation are delayed by 0.5 seconds from turning on the power for a ventilation fan for toilets, and the rotation of the motor and the start of timer operation are The product can be identified by delaying by 1.0 second from the introduction.
[0024]
In the above embodiment, the drive unit 11 includes a relay. However, an electromagnetic contactor may be used instead of the relay, or another switch element made of a solid element may be used.
[0025]
In the above embodiment, only one of the paths connecting the power plug 5 and the motor 2 is disconnected and contacted. However, both paths can be disconnected and contacted at the same time.
[0026]
By the way, although the above embodiment has been described with respect to the ventilation fan having the string switch 9, the present invention is also applied to a so-called ventilation fan attached to a wall instead of the string switch 9 and started and stopped by a wall switch. Can be applied.
[0027]
【The invention's effect】
As apparent from the above description, according to the present invention, since the operation mode changes every time the switch is operated, the start and stop operations are performed in a state that is easy for the user to understand even if the timer function is provided. be able to. Moreover, the effect that the product inspection can be facilitated is also obtained by starting the operation by the timer from the time when the power is turned on.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a configuration of a ventilation unit of an embodiment of a ventilation fan with a timer according to the present invention.
FIG. 2 is a block circuit diagram showing a configuration of a control unit that drives a ventilation fan.
3 is a flowchart showing a specific processing procedure of a microcomputer constituting the control unit shown in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main-body part 2 Motor 3 Blade | blade 4 Cord 5 Power plug 6 Pull string 7 Cover 8 Power supply 9 String switch 10 Control part 11 Driving means 11a Contact point 12 Microcomputer 21 Time measurement means 22 Operation detection means

Claims (1)

Provided in a path for supplying power from a power source through a power supply end, a string switch having a pull string, a motor driving means and a microcomputer for driving a blade, and the motor when the motor is continuously operated for a predetermined time In a ventilation fan with a timer provided with a control unit having timer means for stopping
The control unit includes an operation detection unit that detects that the string switch has been pulled. When the operation detection unit detects that the string has been pulled while the motor is stopped, the control unit starts the motor. The time measurement value of the timer means is started, and when the operation detection means detects that the string has been pulled during operation of the motor, the motor is stopped and the time measurement value of the timer means is When the power supply end is reset and connected to the power source, the motor is started regardless of the pulling operation of the string switch, and the time measurement value of the timer means is started, and the control means is provided. A ventilation fan with a timer.

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