JPS6211726B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The control device according to the present invention is suitable for use as a power saving device for a temperature control device such as an electric blanket.

An embodiment in which a control device according to the present invention is used as a temperature control device for an electric blanket or the like will be described below with reference to the drawings.

In Fig. 1, 1 is an AC power supply, 2 is a load (heating element in the embodiment), 3 is a switching element (thyristor in the embodiment, hereinafter referred to as SCR), and 4 is a control for controlling conduction of SCR3. circuit, 5
is a variable resistor for variable energization rate, 6, 13, 16,
21, 25, 27, 31, 36, 40, 42, 4
5, 54, 59, 60, 62, 67, 73, 7
5, 78, and 79 are npn transistors, 7 is a DC power supply, 8 is a timer for outputting at different times and managing the time of the power saving circuit, 9 is a third switch, 10 is a second switch, and 11 is a first switch. A push-on switch (a normally open switch without a holding function, which closes only when pushed, and has two contacts _9A , _9B , _10A , _10B , _11A , _11B ), 12, 17, 19, 26, 32, 34, 4
1, 46, 48, 50, 61, 69, 70, 71
are diodes, 14, 15, 18, 20, 22,
24, 28, 29, 30, 33, 35, 37, 3
9,43,44,47,49,53,55,5
6, 57, 58, 63, 64, 65, 66, 6
8, 72, 74, 77, 80 are resistances, 23, 3
〓〓〓〓
8 and 76 are light emitting diodes (hereinafter referred to as LEDs);
51 and 52 are pnp transistors.

The AC powered load 2 and the SCR 3 are connected in series to form a main circuit, a control circuit 4 is connected in parallel to the main circuit, the control circuit 4 is connected to the gate of the SCR 3, and the control circuit 4 and the SCR 3 are connected in parallel. A variable resistor 5 for varying the energization rate of the SCR 3 (load 2) is connected between the cathode lines (AC lines) of the SCR 3 (load 2). And DC power supply 7 (the end is SCR3
A timer 8 is connected to the cathode line of the variable resistor 5, and a first output terminal of the timer 8 is connected to the bases of the transistor 6 and the transistor 75 connected across the variable resistor 5. The output terminal is connected to the base of the transistor 60, and the contacts _9A , 10A, 11 of the push-on switches 9, ₁₀ , 11 are connected between the timer 8 and the DC power supply 7.
_A are connected in parallel.

Also connected to the DC power source 7 are first and second self-holding means for a power saving device and two self-holding means A and B for an indicator light.

That is, the transistors 13 and 16 are connected to the DC power supply 7 through the resistor 80, and the connection terminals of these transistors are connected to the resistor 1.
5. Connected to the base of the transistor 21 through a series circuit of the diode 19, and the transistor 21
is also connected to the DC power supply 7 via a resistor 20. The base of the transistor 16 is a diode 17, a resistor 18, and a push-on switch 1.
1 is connected to the end of the DC power supply 7 through a series circuit of contact _11B , and the base of transistor 13 is connected to the collector of transistor 21 through a series circuit of diode 12 and resistor 14, and the LED
The collector of the transistor 21 of the self-holding means A is connected to the base of a transistor 25 via a resistor 22, and the transistor 25 is connected to a DC power supply via a series circuit of an LED 23 and a resistor 24. 7 is connected.

Further, transistors 27 and 31 are connected to the DC power supply 7 via a resistor 28, and these connection ends are connected to the resistor 3.
0, connected to the base of the transistor 36 through a series circuit of the diode 34, and the transistor 36
is also connected to the DC power supply 7 via a resistor 35. The base of the transistor 31 is a diode 32, a resistor 33, and a push-on switch 1.
The base of the transistor ₂₇ is connected to the collector of the transistor 36 through the series circuit of the diode 26 and the resistor 29, and the base of the transistor 27 is connected to the collector of the transistor 36 through the series circuit of the diode 26 and the resistor 29. 1, and the self-holding means also serves as a self-holding means for the LED 38. The collector of the transistor 36 of the self-holding means is connected via a resistor 37 to the base of a transistor 40, which is connected to the LED 3.
8, connected to the DC power supply 7 via a series circuit of a resistor 39. Further, the collector of the transistor 36 is connected to the base of a transistor 79 through a series circuit of a resistor 64 and a diode 69, and the transistor 79 is connected between the gate and cathode of the SCR3, and a transistor 75 is connected between the base and emitter of the transistor 79. The base of the transistor 75 is connected to the terminal of the first output of the timer 8.

Transistors 42 and 45 are also connected to the DC power supply 7 through a resistor 43, and their connection ends are connected to the base of a transistor 54 through a series circuit of a resistor 44 and a diode 50, and the transistor 54 is also connected through a resistor 55. and is connected to a DC power supply 7. The base of the transistor 45 is connected to the DC power supply 7 through a series circuit consisting of a diode 46, a resistor 47, and a contact _9B of the push-on switch 9.
The base of the transistor 42 is connected to the collector of the transistor 54 through a series circuit of a diode 41 and a resistor 49, thereby forming a second self-holding means for the power saving device.
Further, a series circuit of transistors 51, 52 and a resistor 53 is connected between the base of the transistor 54 of the self-holding means and the terminal of the DC power supply 7 in order to send a release signal to the self-holding means.
The base of 2 is connected to the end of the DC power supply via a resistor 57 and a transistor 59.
The base of the transistor 51 is connected to the collector of the transistor 54 via the resistor 58, and the base of the transistor 51 is connected to the end of the DC power supply via the resistor 56 and the transistor 60. is connected to the output terminal of

Furthermore, the collector of the transistor 54 is a resistor 65,
It is connected to the base of a transistor 79 via a series circuit of a diode 70.

〓〓〓〓
Further, transistors 62 and 67 are connected to the DC power source 7 through a resistor 63, and their connection ends are connected to the base of a transistor 73 through a series circuit of a resistor 66 and a diode 71, and the transistor 73 is also connected through a resistor 72. and is connected to a DC power supply 7. The base of the transistor 62 is connected to the collector of the transistor 73 through a series circuit of a diode 61 and a resistor 68, and the LED 76 is connected to the collector of the transistor 73.
The base of the transistor 67 is connected to the connecting end of the diode 46 and the resistor 47 via the diode 48, and the base of the transistor 67 is connected to the connection terminal of the diode 46 and the resistor 47 through the diode 48, and the self-holding means B is operated in conjunction with the push switch 9. The collector of 73 is resistor 74
The transistor 78 is connected to the DC power supply 7 through a series circuit including an LED 76 and a resistor 77.

In addition, in FIGS. 2, 3, and 4, the load 2 is used as a heating element, the control device is used as a temperature control device such as an electric blanket, the variable resistor 5 is used as a temperature control device, and the push-on switches 11, 10, Figure 2 shows the temperature characteristics of the load (heating element) 2 when the switch 9 is turned on. FIG. 7 is a temperature characteristic diagram when the push-on switch 9 is turned on. And, during the period when the first output signal of the timer 8 is output, the first output signal is
The second output signal is output (or after it is output) until it is turned off and the second output signal is sent.
In the period, A represents the maximum temperature that can be set by the variable resistor 5, B represents the temperature set by the variable resistor 5, and C represents the indoor temperature (temperature before energization).

FIG. 5 is a time chart of the output signal of the timer 8, and a indicates the push-on switch 11.
When turned on, b turns push-on switch 10.
If turned on, c turns on push-on switch 9.
In the time chart, α indicates the first output signal, β indicates the second output signal, and,
represents the same period as FIGS. 2, 3, and 4.

The operation of the control device having the above configuration when applied to a temperature control device such as an electric blanket, where the load 2 is a heating element and the variable resistor 5 is a temperature adjusting variable resistor, will be described below.

When the temperature control device is connected to the AC power supply 1, the SCR 3 is made conductive by a signal from the control circuit 4, and the heating element (load) 2 is energized, and when the temperature rises to the temperature set by the temperature control variable resistor 5. , due to the function of the temperature detection circuit included in the control circuit 4.
SCR3 repeats ON and OFF at that temperature to keep the temperature constant.

By the way, when the push-on switch 11 is turned on once when the power is turned on, the timer 8 and the self-holding means A for the indicator light (LED 23) start operating by the contacts _11A and _11B , and the timer 8 turns on the first Give an output signal. (However, the period during which the first output signal is output can be arbitrarily set by a time setting device (omitted) in the timer 8.) First, the first output signal of the timer 8 is used to control the transistors 6 and 75. The base current flows through transistors 6 and 75, but transistor 75's
ON does not affect the control device at this time. Then, when the transistor 6 turns on, the temperature adjusting variable resistor 5 is electrically short-circuited (this means that the variable resistor 5 is set at the highest set temperature as a temperature adjusting device), so the temperature of the heating element decreases. is the second
As shown in the figure, the indoor temperature C rises to the maximum temperature A, and that temperature is maintained. and timer 8
When the period in which the first output signal is output has elapsed, the (first) output signal from the timer is stopped as shown in FIG. 5a, and the transistor 6 (transistor 7)
5) is turned OFF. Therefore, the temperature of the heating element falls to the temperature RO set by the variable resistor 5 in FIG. 2, and thereafter, as shown in FIG. The temperature set by the variable resistor 5 remains constant. Further, a series of operation indicator lights (LED 23) are lit to indicate that the push-on switch 11 has been turned on. That is, push-on switch 1
When contact _11B of 1 is turned on, contact _11B , resistor 18, and diode 17 are connected to the base of transistor 16.
The base current flows through the transistor 16.
When turned on, the collector potential of the transistor 16 becomes zero, and no base current flows through the transistor 21. (Until then, resistance 80, resistance 5
0, the base current flows to the transistor 21 via the diode 19 and the transistor 21 is in the ON state) Therefore, the transistor 21 is OFF and the collector potential of the transistor 21 rises, so the transistor
Resistors 20 and 14 and diode 12 are also connected to resistor 13.
The base current flows through the transistor 13 as well.
It becomes ON state. Then transistors 13 and 16
The collector potential remains at a certain atmosphere, and this state continues even if the contact _11B is opened. That is, the self-holding means A operates, and the resistor 2 is also connected to the base of the transistor 25.
Since the base current flows through 0 and 22 and transistor 25 is also turned on, current flows to LED 23.
LED23 lights up. This continues regardless of the temperature of the load (heating element) 2 until the DC power source 7 is turned off.

Also, the push-on switch 10 was activated at the beginning of the passage.
When turned ON, the first self-holding means for the power saving device operates (self-holding) through contacts 10 _A and 10 _B.
The timer 8 then outputs a first output signal. (However, during the period when the first output signal is output, the timer 8
First, the base current flows through the transistors 6 and 75 by the first output signal of the timer 8, and the transistors 6 and 75 are turned on. By turning ON the transistor 6, the variable resistor 5 for temperature adjustment is electrically short-circuited, and the push-on switch 11 is turned on.
The temperature of the heating element is as shown in Figure 3, just like when it is turned on.
The indoor temperature rises from C to the maximum temperature A.

In addition, when the contact _10B is turned on, the transistor 31 is connected via the contact _10B , the resistor 33, and the diode 32.
is turned on, and the collector potential of the transistor 31 becomes atmospheric. Then, the base current stops flowing to the transistor 36 (until then, the base current flows to the transistor 36 via the resistors 28, 30 and the diode 34, and the transistor 36 is in the ON state).
Therefore, the transistor 36 is turned off, the collector potential of the transistor 36 rises, and the transistor 2
A base current also flows through resistor 7 through resistors 35, 29 and diode 26, and transistor 27 is also turned on. Then, the collector potentials of the transistors 27 and 31 remain in the atmosphere, and this state continues even if the contact _10B is opened. That is, the first self-holding means is self-holding (operating) and the transistor 40 is also connected to the resistor 3.
Since the base current flows through 5 and 37, the transistor 40 is also turned on, and the resistor 3 is also connected to the LED 38.
9. Current flows through transistor 40 and LED
38 lights up. At the same time, the base current also tries to flow to the transistor 79 via the resistors 35, 64 and the diode 69, but since the transistor 75 is in the ON state due to the first output signal of the timer 8, the base-emitter current of the transistor 79 is The period between them is electrically short-circuited by transistor 75, and transistor 79 is in an OFF state. And the first above
The operation of the self-holding means continues until the DC power supply 7 is released. Furthermore, the temperature of the heating element rises to the maximum temperature A as shown in Fig. 3 and maintains that temperature, but when the period in which the first output signal of the timer 8 is output has elapsed, as shown in Fig. 5 b. As a result, the first output signal α of the timer 8 is no longer output. Then, the transistors 6 and 75 are turned off, and the electrical short circuit of the variable resistor 5 and the short circuit of the output signal of the first self-holding means are released. Therefore, the output signal of the first self-holding means is applied as the base current of the transistor 79 via the resistors 35, 64 and the diode 69, so that the transistor 79 is turned on. Then, since the gate signal from the control circuit 4 to the SCR3 is short-circuited by the transistor 79, no gate current is applied to the SCR3, and the SCR3 maintains an OFF state. Therefore, as shown in FIG. 3, the temperature of the heating element decreases from the state of maximum temperature A, and after falling to the initial temperature (room temperature) C, maintains that state. This continues until the DC power supply 7 is turned off.

Furthermore, the push-on switch 9 was activated when the power was first turned on.
When turned on, contacts 9 _A and 9 _B provide a second self-holding means and indicator light (LED 76) for the power saving device.
The self-holding means B for this operates (self-holding) and the timer 8 issues a first output signal. (However, the first
The period during which the output signal is output can be arbitrarily set by the time setting device (omitted) in the timer 8, as in the above two cases, but in this case, the second output of the timer 8 can be set arbitrarily. The output of the signal and the period until the signal is output are set by a time setting device (not shown) in the timer 8. ) First, the base current flows through the transistors 6 and 75 in response to the first output signal of the timer 8, and the transistors 6 and 75 are turned on. When the transistor 6 is turned on, the variable resistor 5 is electrically short-circuited, and as soon as the push-on switch 9 is turned on, the temperature of the heating element rises from the indoor temperature C to the maximum temperature A, as shown in the fourth figure. Warm up. Contact point 9 _B
When turned on, contact 9 _B , resistor 47, diode 46
〓〓〓〓
The transistor 45 is turned on via the voltage, and the collector potential of the transistor 45 becomes zero. Then, the base current stops flowing to the transistor 54 (until then, the base current flows to the transistor 54 via the resistors 43 and 44 and the diode 50, and the transistor 54 is in the ON state).Therefore, the transistor 54 is OFF (the collector of the transistor 54 is in the ON state). The potential increases and the transistor 42
A base current flows through the resistor 49 and the diode 41, and the transistor 42 is also turned on. Then, the collector potentials of the transistors 42 and 45 remain zero, and this state continues even if the contact _9B is opened. Therefore, the second self-holding means operates (self-holding) and its output signal is applied to the beta of the transistor 79 via the resistors 55, 65 and the diode 70, but due to the first output signal of the timer 8. Since the transistor 75 is in the ON state, it is short-circuited by the transistor 75 and the transistor 79
is not applied to the base of Further, when the contact 9 _B is turned on, a base current flows to the transistor 67 via the contact 9 _B , the resistor 47, and the diode 48, and the transistor 67 is also turned on. Then transistor 67
The collector potential of the transistor 73 becomes zero, and the base current no longer flows through the transistor 73.
is in the OFF state. (Until then, resistance 63, 66
(The base current flows to the transistor 73 via the diode 71 and the transistor 73 is in the ON state.) Therefore, the collector potential of the transistor 73 rises, and the base current also flows to the transistor 62 via the resistor 68 and the diode 61.
is also turned on. Then transistors 62,6
The collector potential of 7 continues to be zero, and this state continues even if contact _9B is opened. That is, the self-holding means B for the indicator light is self-holding (operating), and therefore its output signal is passed through the resistors 72 and 74 to the transistor 78.
Transistor 78 applied as a base current of
becomes ON state. Then, resistor 7 is connected to LED 76.
7. Current flows through transistor 78 and LED
76 lights up to indicate that the push-on switch 9 has been turned on. This continues until the DC power supply 7 is released. The heating element temperature rises to the maximum temperature a as shown in FIG. 4, maintains that temperature, and when the period during which the first output signal of the timer 8 is output elapses, the first output signal α as shown in FIG. is turned OFF, then the first output signal is not applied to the transistors 6 and 75, and the transistors 6 and 75 are turned OFF. Then, the short-circuited state of the variable resistor 5 caused by the transistor 6 is released. Furthermore, by turning off the transistor 75, the output signal of the second self-holding means is no longer short-circuited by the transistor 75, and the output signal of the second self-holding means is transferred to the resistor 5.
5, 65, is applied to the base of the transistor 79 via the diode 70, and the transistor 79 is turned on.
become a state. Then, the gate signal from the control circuit 4 to the SCR3 is short-circuited by the transistor 79 and is not applied to the SCR3, so that the SCR3 is turned off and this state is maintained. Therefore, the temperature of the heating element decreases from the maximum temperature A as shown in FIG. 4, and maintains this temperature. When a period in which no output signal from the timer 8 is output has elapsed, the second output signal .beta. from the timer 8 is output as shown in FIG. (This second output signal β may be a single pulsed output signal instead of a DC potential that is output for a period of time as shown in FIG. 5.) Then, in FIG. The output signal β is applied to the base of the transistor 60, and the transistor 60 is turned on. Therefore, the transistor 51
The base current flows through the resistor 56 and the transistor 60, turning on the transistor 5.
2, the base current flows through the resistor 57 and the transistor 59, so the transistor 50 is also turned on. (The transistor 59 is turned on because the base current flows through the resistors 55 and 58 because the transistor 54, which is the second self-holding means, is in the OFF state.)
When transistors 51 and 52 are turned on, transistors 51 and 52 and resistor 5 are connected to transistor 54.
A base current (release signal) flows through the transistor 3, and the transistor 54 is inverted to the ON state. Then, the collector potential of the transistor 54 becomes zero, and no base current flows through the transistors 42, 79, and 59, and these transistors 42, 79, and 59 are turned off. The transistor 42 is turned off by turning off the transistor 42.
Since the collector potential of increases, the transistor 59
Even if it is turned off, the transistor 54 has resistors 43 and 4.
4. The base current flows through the diode 50.
The transistor 54 maintains the ON state. That is, the second
(only) self-preservation measures have been lifted. Then, the short circuit between the gate and cathode of the SCR3 is released by turning off the transistor 79, and the SCR3 is turned on again by a signal from the control circuit 4.

Then, as shown in Fig. 4, the temperature of the heating element rises again, but at this time, the variable resistor 5 is not short-circuited, so the temperature of the heating element rises to the temperature set by the variable resistor 5. sustain. This continues (for a period) until the AC power supply 1 is released.

As explained above, if the control device according to the present invention is used as a temperature control device for, for example, an electric blanket, 3 courses (4 courses if you include the case where the button is not turned on) can be obtained by simply pressing any of the 3 push-on switches. You can use the temperature characteristics of When you press switch 9 on, the heating element turns off while you sleep because it warms your bedding and body when the power is first turned on, and when you wake up in the morning, the heating element turns on, making it an ideal power-saving course that allows you to wake up comfortably. It is possible to provide an extremely user-friendly electric blanket that can be used as a normal electric blanket when the push-on switches 9, 10, and 11 are not turned on.

Since the control device of the present invention has the above-described configuration, it is possible to control different loads corresponding to the first, second, and third switches by an extremely simple operation of only operating the first, second, and third switches. The energization state can be easily selected, and when the first switch is operated, the maximum energization is performed to the load by the first output signal of the timer, and after a certain period of time, the energization rate is set by the variable energization rate device. When the energization rate is applied and the second and third switches are operated, the energization to the load is stopped unless energization to the load is required, and the first, second, and third switches are Since the above-mentioned timer is operated, it is only necessary to set the time required to cut off the energization to the load when the first switch is operated, and unnecessary energization to the above-mentioned timer can be eliminated. A control device with extremely high power saving efficiency can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing one embodiment of the control device of the present invention, and FIGS. 2 to 4 show the load (heating element) when the control device of FIG. ), and FIG. 5 is a time chart of the output signal of the timer shown in FIG. 1. In the drawings, 2 is a load, 3 is a thyristor, 4 is a control circuit, and 8 is a timer. 〓〓〓〓

Claims (1)

[Claims] 1. A switching element that controls energization to a load, a switching element control means including an energization rate variable device that varies the energization rate of the switching element, a door, and a self-holding device that self-maintains the switching element control means in a predetermined state. means, a timing device for controlling said self-maintaining means by temporal first and second output signals; and a timing device for operating said self-maintaining means and for controlling said self-maintaining means by means of a first output signal of said timing device. A corresponding one of the self-holding means operates the switching element, and after a predetermined time has elapsed, the energization rate variable device, the switching element control means,
a first switch that operates the switching element; and a first switch that operates the timer; and a first output signal of the timer that operates a corresponding one of the self-holding means and the switching element; A second switch that stops the switching element etc. after a period of time has passed, and a second switch that operates the timer, and a first output signal of the timer activates one of the self-holding means corresponding to the self-holding means and the switching element. the switching element, etc., after a predetermined period of time has elapsed,
A control device comprising: the energization rate variable device, the switching element control means, and a third switch that operates the switching element in response to a second output signal of the timer after a certain period of time has elapsed.