JPS6246112Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a timer operation device for a hot air heater.

In conventional warm air heaters, the timer operation is such that after the timer time is set, normal operation is started after the set time has elapsed. In this case, if you forget that the timer is running and go out while the set time has elapsed, leaving your home unattended for a long time, the hot air heater may continue to operate unnecessarily. It was hot.

The present invention is based on the above considerations, and after the timer setting time has elapsed, combustion operation is performed for a certain period of time (for example, one hour), and then combustion is stopped and a buzzer and LED are activated at a certain time before the combustion operation stop command is issued. By notifying family members of advance notice, family members are given the opportunity to choose whether or not to continue driving normally.

An embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2. FIG. 1 shows the sequence of the present invention. By setting the timer, the timer setting time is determined and the timer
Timer operation is indicated by lighting the LED. After setting the timer, when the timer setting time has elapsed, the operation LED will light up as soon as the operation starts.
lights up. Furthermore, after a certain time A has passed after the start of operation, the operation will stop, but a certain time B before that, the operation LED will go into flashing mode.
Also, the buzzer sounds intermittently to notify that the system will stop after time B. Furthermore, after the operation is stopped, the operation LED turns off and the timer LED goes into blinking mode to notify the end of the timer operation.

FIG. 2 is a timer operation control circuit showing an embodiment of the present invention. 1 is a microcomputer, and the functions of the terminals are V _DD and V _SS are the power supply for the microcomputer. P ₀ , P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ are data terminals output by the microcomputer 1 when determining a timer time, which will be described later. _P6 is a relay control terminal for controlling operation, and _P7 is a terminal for controlling a buzzer. P ₈ is for timer
The LED control terminal _P9 is the control terminal for the driving LED. _P10 is an input terminal, which determines the timer time and enters timer operation by setting _P10 to "L" when setting the timer. _P11 is an input terminal for determining whether the timer setting time determined by the microcomputer 1 is correct, and _P12 is a clock input terminal for functioning as a clock (in other words, counting time). 2 is a commercial power source, both ends of which are connected to a series circuit of a load 4 of the warm air heater and a parallel circuit of a transformer 5 via a normally open contact 3a of a relay 3, which will be described later. The secondary side of the transformer 5 is full-wave rectified by a bridge diode 6. The full-wave rectified wave is set to V _R , _which is further rectified by a diode 7 and then input to the DC power supply circuit 8 . At the output of the DC power supply circuit 8, a V ⁺ line that supplies power to the relay, buzzer, and LED, and V _DD and V _SS that supply power to the microcomputer and peripheral circuits are generated. E is a timer setting time comparison circuit. C is a DIA conversion circuit, and output terminals P ₀ of microcomputer 1,
The output signals from P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ are inverted by inverters 9 to 14, and further
This is to generate an analog voltage in the D section. Note that the resistors 30 to 35 are pull-down resistors for output signals from the output terminals P ₀ , P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ of the microcomputer 1. 36 is a variable resistor for timer time setting, which is connected to _VDD via a resistor 37 and to _VSS via a resistor 38, and whose center terminal is connected to a comparator 39.
connected to the non-inverting input of Also, comparator 3
The D/A conversion output voltage generated at the D section is supplied to the inverting input of the circuit 9. Further, the output of the comparator 39 is connected to V _DD via a resistor 40 and also to the P ₁₁ terminal of the microcomputer 1. F is a timer clock pulse generation circuit. 41 is a comparator, and a waveform obtained by voltage-dividing the full-wave rectified wave _VR by resistors 42 and 43 is input to the inverting input. Further, a voltage obtained by dividing V _DD by resistors 44 and 45 is supplied to the non-inverting input of the comparator 41 as a reference voltage. Further, the output of the comparator 41 is connected to V _DD via a resistor 46 and also to P ₁₂ of the microcomputer 1. Therefore, since a square wave is supplied to _P12 once per full-wave rectification cycle, a square wave pulse with twice the frequency of the commercial power supply is input, and by counting this pulse, the time can be calculated. has been decided. 47
is a transistor that controls the relay 3 that controls the load 4 of the warm air heater, its base is connected to P ₆ of the microcomputer 1, its emitter is connected to V _SS , and its collector is connected to the relay 3 via the relay 3. Connected to V ₊ . 48 is a diode for the purpose of protecting the transistor 47. 49 is a buzzer, 50 is a transistor that controls the buzzer 49, its base is connected to P ₇ of the microcomputer 1, its emitter is connected to V _SS , and its collector is connected to V ₊ via the buzzer 49. Connected. 51 is a timer LED that displays timer operation, and 52 is a current limiting resistor for the timer LED. 53 is a transistor that controls the timer LED 51, its base is connected to _P8 of the microcomputer 1, its emitter is connected to V _SS , and its collector is connected to V ⁺ via a resistor 52 and the timer LED 51. be done. 54 is an operating LED that displays combustion operation, and 55 is a current limiting resistor for the operating LED.
56 is a transistor that controls the operating LED 54, and its base is connected to the microcomputer 1.
P ₉ and the emitter is connected to V _SS ,
The collector is also connected to V ₊ via a resistor 55 and an operating LED 54 . 57 is a timer setting switch; one end is connected to _P10 of the microcomputer 1, and the other end is connected to V _SS through a resistor 58.
connected to.

Next, the operation of one embodiment of the present invention will be explained. First, the timer setting time is determined by the variable resistor 36. This determines the non-inverting input voltage of the comparator 39. Next, when the timer set switch 57 is turned on, the microcomputer 1
By inputting “L” to P ₁₀ , the microcomputer 1 outputs terminals P ₀ , P ₁ , P ₂ , P ₃ ,
“L”, “L”, “L”, “L”, “L” for P ₄ and P ₅ respectively
，
“L” to “L”, “L”, “L”, “L”, “L”,
“H”, then “L”, “L”, “L”, “L”, “H”
，
“L”, then “L”, “L”, “L”, “L”, “H”
，
“H”, and so on, while manipulating each bit (P ₀ to P ₅ ), the final result is “H”, “H”, “H”, “H”,
By changing the voltage up to "H" and "H", the analog voltage of the D section is sequentially changed. Furthermore, the microcomputer 1 sequentially monitors the input of _P11 (that is, the output of the comparator 39) for each change, _and
P ₀ when the input changes (“L” → “H”),
Each bit data of P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ is stored internally as a timer setting time. At the same time, by outputting "H" to _P8 , the transistor 53
Turn on the timer LED 51. Subsequently, resistors 42 to 46 and comparator 41
The pulses of the timer clock circuit output ( _P12 terminal input of microcomputer 1) consisting of
1 from each bit data of P ₀ , P ₁ , P ₂ , P ₃ , P ₄ , P ₅
When each bit data becomes 0, the timer setting time is over, and the relay 3 is turned on by setting P ₆ and P ₉ of the microcomputer 1 to "H" and turning on the transistors 47 and 56. By turning it on and supplying power to the load 4 of the warm air heater, combustion operation is started, and the operating LED is displayed because the D54 that is being operated is energized. After the start of operation, the operation continues for a certain period of time A, and after the elapse of time A, the microcomputer 1's _P6
The operation is stopped by setting "L" to turn off the transistor 47 and turn off the relay 3.
In addition, by changing P ₉ of the microcomputer 1 from the "H" state to a pulsed output a certain period of time B before that, the operation LED 54 changes from a lit state to a blinking state, giving a notice that the operation will soon stop. _P7 of the microcomputer 1 also intermittently repeats "H" and "L" several times, thereby making the buzzer sound intermittently to give a warning.
Also, after stopping the operation, set _P9 to “L” and the operation LED
The end of the operation is notified by turning off the light, causing _P8 to repeatedly output "H" and "L" intermittently, and blinking the timer LED 51.

As described above, according to the present invention, after the set time has elapsed after setting the timer time, the combustion operation is performed for a certain time A, and then the combustion is stopped and a buzzer and LED are emitted before the combustion operation stop command is issued. By giving advance notice to the driver, the family member can have the opportunity to choose whether or not to continue driving normally.

[Brief explanation of the drawing]

Figure 1 is an operation sequence diagram according to the present invention, Figure 2
The figure shows a circuit diagram of an embodiment of the present invention. 1...Microcomputer, 3...Operation control relay, 4...Load of hot air heater, 49...Buzzer, 51...LED for timer, 54...LED for operation, E...Comparison of timer setting times circuit, F
...Clock pulse generation circuit for timer.

Claims (1)

[Scope of utility model registration request] A microcomputer 1 and a timer setting time comparator circuit E that converts the timer setting time from an analog voltage to A/D as input to the microcomputer 1, and a timer clock pulse generation circuit F that generates a clock pulse having a frequency that is an integral multiple of the frequency of the commercial power supply. As outputs, the microcomputer 1 has the digital output for A/D conversion, the operation control relay 3 control section, the buzzer 49 control section, the operation LED 54 control section, and the timer LED 51 control section. When doing so, the timer setting time comparison circuit E detects the setting time based on the digital output for A/D conversion, and the time is managed based on the signal from the timer clock pulse generation circuit F, and the timer setting time is After the elapse of time, the operation is started, and the operation control relay 3 control is controlled to automatically stop the operation after a certain period of time, and the buzzer 49 control section and the operation LED 54 control section are controlled and driven from a certain period of time before the stop. A timer operation device for a hot air heater, characterized in that it has a function of giving advance notice of stoppage.