JPH0683510B2 - Remote control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a remote control device used for a water heater, an air conditioner, and the like.

(B) Conventional technology For example, in Japanese Utility Model Laid-Open No. 62-192046, a power supply circuit of a main control unit on the main body side of an equipment is equipped with an operation switch, a combustion indicator lamp, a capacity adjusting unit, and the like, and a pair of remote controllers is provided. It is a remote control device that is connected via wiring, and sends and receives control signals between the main control unit and the remote control via wiring.By switching the output level of the power supply circuit, the combustion indicator lamp of the remote control can be turned on. There is disclosed a remote control device that lights up and changes a voltage value or a current value of a wiring according to an operation amount of a capacity adjusting unit.

(C) Problems to be Solved by the Invention In the above-described conventional technique, when the output level of the power supply circuit is switched, the voltage value or current value of the wiring, which changes according to the operation amount of the capacity adjusting unit, changes and the main control is performed. There was a problem that it became difficult to control the department.

The present invention enables an operating state of a device controlled by a main control unit to be identified by using a voltage signal or a current signal from the main control unit to a remote control unit, and the remote control unit based on the voltage signal or the current signal. It is an object of the present invention to provide a remote control device in which the operation signal from the main controller to the main controller is not affected.

(D) Means for Solving the Problems In the present invention, a main control unit that controls the operation of a device and emits a voltage signal according to the operation of the device, and a device for controlling the device through a pair of wires from the main control unit. A remote controller that is supplied with a voltage signal according to the operation and outputs a current signal according to the operation of the setting unit to the main control unit via the wiring,
The remote controller has a constant current circuit that outputs a current signal according to the operation of the setting unit, a voltage level detection unit that detects the level of the voltage signal according to the operation of the device, and a detection level of this voltage level detection unit. Accordingly, a display device for displaying the operating state of the device is provided.

Further, according to the present invention, a main control unit that controls the operation of the device and emits a current signal according to the operation of the device, and a current signal according to the operation of the device is supplied from this main control unit through a pair of wires. And a remote controller that outputs a current signal according to the operation of the setting unit to the main control unit through the wiring, and the remote controller outputs a current signal according to the operation of the setting unit. A configuration in which a current circuit, a current level detecting means for detecting the level of a current signal according to the operation of the equipment, and a display for displaying the operating state of the equipment according to the detection level of the current level detecting means are provided. Is.

(E) When the voltage signal or current signal supplied from the main control unit to the remote controller changes according to the operation of the operating equipment, the level of this voltage signal or current signal is detected by the remote controller, and the detection level is detected. In addition to displaying the operating status of the device on the remote display according to the above, the current or voltage signal from the remote controller to the main control unit becomes constant due to the operation of the constant current circuit or constant voltage circuit. Even if the voltage signal or the current signal supplied from the main control unit to the remote controller changes according to the operation of 1, there is no concern that the operation signal according to the operation in the setting unit is affected.

(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, (A) is a water heater, (B) is a remote controller, and the water heater (A) and the remote controller (B) are connected by a pair of wires (30), (31). There is. (1) is a water heater control circuit provided in the main controller (C) of the water heater (A), and this control circuit (1) has an outside air temperature sensor (which detects the ambient temperature of the water heater (A) ( S) is connected.
A DC voltage is supplied to the control circuit (1).
(2) and (3) are the first resistance and the second resistance connected to the first output terminal (1A) and the second output terminal (1B) of the control circuit (1), respectively, and (4) is The third resistor, (5) is the first transistor, and (6) is the fourth resistor for current detection. Then, the first transistor (5) and the fourth resistor (6)
The midpoint between and is connected to the input terminal (1C) of the control circuit (1).

The remote controller (B) is constructed as shown in the drawing,
(7) is an operation switch, (8) is a combustion indicator lamp connected to the normally open contact (7a) of the operation switch (7), and (9) is connected to a normally closed contact (7b) of the operation switch (7). It is a freeze prevention indicator lamp. Further, (11) is a first constant voltage diode as a voltage level detecting means, (12) is a second transistor, and (13) is an operation display lamp. In addition, (1
5) is a constant current circuit, (16) is a second constant voltage diode, (17) is a variable resistor (setting unit) for temperature setting, (18)
Is a diode, (20) is a third transistor, and (21) is a fifth resistor for current detection. Further, (22) is the sixth resistor.

The operation of the remote control device will be described below. When the first output terminal (1A) of the water heater control circuit (1) outputs a low level signal (hereinafter L signal) and the second output terminal (1B) outputs a high level signal (hereinafter referred to as H signal), The voltage across the 3 resistor (4) is small and the remote controller (B) is supplied with a low voltage. Here, when the operation switch (7) is off and in the normally closed contact (7b), the voltage supplied to the remote controller (B) is low, so that the constant voltage diode (11) is non-conductive, and the second transistor (12) is off, no current flows through the freeze prevention indicating lamp (9), and the freeze prevention indicating lamp (9) is off.

The user operates the operation switch (7), and the normally open contact (7a)
When switched to, the operation indicator lamp (13) lights up. Further, the second constant voltage diode (16) becomes conductive and a constant voltage is generated between both ends. This voltage is divided by the sixth resistor (22) and the variable resistor (17), and the voltage at the midpoint (23) becomes a voltage according to the temperature setting. Then, a current flows through the third transistor (20) so that a voltage equivalent to the voltage at the midpoint (23) is generated across the fifth resistor (21). Therefore, the current flowing through the fifth resistor (21) is kept substantially constant unless the variable resistor (17) is operated. Then, a current corresponding to the setting of the variable resistor (17), which is obtained by adding the current flowing through the variable resistor (17) and the current flowing through the fifth resistor (21), is transmitted from the remote controller (B) through the wiring (31). Flow to the main controller (C).

The current flowing into the main controller (C) flows through the first transistor (5) and the fourth resistor (6). Fourth resistance (6)
A voltage proportional to the current is generated between both ends of, and this voltage is input to the control circuit (1) from the input terminal (1C). The control circuit (1) operates by interpreting the input from the input terminal (1C) as an operation signal and a temperature setting signal, and combustion of the water heater (A) starts.

When the water heater (A) starts burning, the control circuit (1) operates, and the second output terminal (1B) outputs the L signal instead of the H signal. Then, the voltage across the third resistor (4) becomes high, and a high voltage is supplied to the remote controller (B). Then, the first constant voltage diode (11) is turned on, the second transistor (12) is turned on, and the combustion display lamp (8) is turned on. Here, when the voltage supplied to the remote controller (B) becomes high and current flows through the combustion indicating lamp (8) and the first constant voltage diode (11), the second transistor (20)
The current flowing in the constant current circuit (15) decreases and the current flowing in the fifth resistor (21) of the constant current circuit (15) is kept constant. The current flowing through the variable resistor (17) is added to the current flowing through the fifth resistor (21), that is, from the remote controller (B) to the main controller (C).
The current flowing to is kept constant by the constant current circuit (15). Therefore, the voltage across the fifth resistor (6), which is the temperature setting signal, does not change.

When the combustion in the water heater (1) continues and the temperature of the hot water in the water heater (1) rises to the set temperature, the combustion stops and the second output terminal (1B) changes to the L signal and the H signal. Is output.
Then, the voltage across the third resistor (4) becomes low, and a low voltage is supplied to the remote controller (B). Then, the combustion indicator lamp (8) is turned off as in the state before the start of combustion. Further, the current flowing from the remote controller (B) to the main controller (C) is kept constant by the constant current circuit (15), the voltage input to the control circuit (1) does not change, and the temperature control continues. Is done.

Similarly, even if the voltage supplied from the water heater (1) to the remote controller (B) changes due to the combustion and stop of combustion of the water heater (1), the main controller from the remote controller (B) The temperature of the water heater (A) is controlled without changing the current flowing to the controller (C).

When the user operates the variable resistor (17) to change the set temperature, the current flowing from the remote controller (B) to the main controller (C) changes. After that, even if the voltage supplied from the water heater (A) to the remote controller (B) changes, the current is kept constant by the operation of the constant current circuit (15) to control the temperature of the water heater (A). Is done.

After that, when the user operates the operation switch (7) to switch from the normally open contact (7a) to the normally closed contact (7b), the remote controller (B) at the time of switching flows to the main controller (C). Due to the decrease of the current, the input voltage of the input terminal (1C) is significantly decreased, and the control circuit (1) operates. When the H signal is output from the second output terminal (1B), H (9)
The signal is continuously output, the water heater (A) is burning, and L
When the signal is output, combustion stops and
The second output terminal (1B) outputs the H signal instead of the L signal. Therefore, the voltage supplied to the remote controller (B) becomes low, and the second transistor (12) is also turned off.

When the temperature of the outside air decreases while the water heater (A) is stopped as described above, and the temperature reaches a temperature at which the water heater (A) may freeze, the outside air temperature sensor (S) detects the temperature. Then, the control circuit (1) operates. Then, the water heater (A) starts to burn, the freeze prevention operation starts, and the control circuit (1) starts.
The second output terminal (1B) of outputs the L signal instead of the H signal. Therefore, the voltage supplied to the remote controller (B) becomes high, the second transistor (12) is turned on, and the freeze prevention indicating lamp (9) is turned on. After that, when the hot water temperature reaches a predetermined temperature (for example, 20 ° C.), the control circuit (10) operates and the water heater (A) stops combustion. Also, the H signal is output instead of the L signal from the second output terminal (1B) of the control circuit (1), and the voltage supplied to the remote controller (B) becomes low. Then, the second transistor (12) is turned off, and the freeze prevention indicator lamp (9) is turned off. Such anti-freezing operation is intermittently performed when there is a risk of freezing.

Thereafter, when the user operates the operation switch (7) to switch from the normally closed contact (7b) to the normally open contact (7a), combustion of the hot water supply cutoff (A) is started in the same manner as above. Also, the user operates the operation switch (7) to move the normally open contact (7a) to the normally closed contact (7a).
If you switch to b), anti-freezing operation will be performed if necessary.

According to the remote control device configured as in the above embodiment,
The current flowing from the remote control unit (B) to the main control unit (C) changes when the voltage supplied from the main control unit (C) to the remote control unit (B) changes with the start of combustion of the water heater (A). Also becomes constant by the action of the constant current circuit (15) and is determined by the operation of the variable resistor (17) for temperature setting. Therefore, a signal is added to the voltage supplied from the main controller (C) to the remote controller (B), the voltage is changed, and the combustion state of the water heater is displayed on the combustion display lamp (8) according to the voltage level. Even if
The signal from the remote controller (B) to the main control unit (C) can be prevented from changing, the malfunction in the control circuit (1) can be prevented, and the water heater (A) to the remote controller (B) can be prevented. Complex control can be performed by changing the supplied voltage.

Hereinafter, another embodiment of the present invention will be described with reference to FIG.
The same parts as those in FIG. 1 are designated by the same reference numerals. Second
In the figure, (40) is a control circuit provided in the main control section (C) of the water heater (A), and (41) is a constant current circuit. The constant current circuit (41) includes a fourth transistor (42), a third,
The fourth constant voltage diodes (43) and (44), the light receiving element (46) of the photocoupler (45), and the like. or,
Reference numeral (47) is a light emitting element of a photocoupler (45) which is turned on according to the output of the control circuit (40), and (48) is a control circuit (4).
0) is the voltage input line connected to.

(53) is a current level detection circuit, which includes (50), (8),
And (52) are a fifth transistor, a combustion indicator lamp, and a first constant current element, respectively. Further, (54) is a sixth transistor, (55) is a fifth constant voltage diode,
(59) is a seventh transistor, and (70) is a current detecting resistor. Reference numeral (56) is a constant voltage circuit, and the constant voltage circuit (56) includes an operation switch (7), a voltage dividing resistor (58), a temperature setting variable resistor (setting unit) (60), an amplifier (61) and a It is composed of 6 constant voltage diodes (62) and the like. In addition, a series circuit of the operation indicator lamp (13) and the second constant current element (63) between the midpoint of the operation switch (7) and the voltage dividing resistor (58) and the emitter of the seventh transistor (59). Are connected.

The operation of the remote control device will be described. When the user turns on the operation switch (7), the voltage V _R which is determined by the following formula is applied from a voltage input line (48) to the control circuit (40).

Here, R is the resistance value of the voltage dividing resistor (58), Rv is the resistance value of the variable resistor (60), and V is the voltage between both terminals of the sixth constant voltage diode (62). The voltage V is lower than the minimum value of the voltage V _R.

Then, based on the operation of the control circuit (40), the water heater (A)
Driving begins. Further, the operation display lamp (13) is energized and lit.

The light emitting element (47) of the photocoupler (45) is turned on by the output of the control circuit (40), and the light receiving element (46) is turned on.
Therefore, both ends of the fourth constant voltage diode (44) are short-circuited, and the current supplied from the constant current circuit (41) to the remote controller (B) becomes small. Therefore, the current detection resistor (70)
The voltage between the two terminals is low, the fifth constant voltage diode (55) is off, the sixth and fifth transistors (54), (50) are off, and the combustion indicator lamp (8) does not light. When the water heater (A) ignites, the control circuit (40) operates to stop the output to the light emitting element (47). And light emitting element (47)
Turns off, the light emitting element (46) turns off, and a current flows through the fourth constant voltage diode (44). Therefore, the constant current circuit (4
The current flowing from 1) to the remote controller (B) increases,
The input to the positive side input terminal of the amplifier (61) becomes large.
Then, the output of the amplifier (61) increases, the emitter current of the seventh transistor (59) increases, the voltage between both terminals of the current detection resistor (70) increases, and the fifth constant voltage diode (55) When turned on, the sixth and fifth transistors (54),
(50) turns on. Then, the combustion indicator lamp (8) is turned on. As described above, even when the current supplied from the main controller (C) to the remote controller (B) increases, the increased current flows to the seventh transistor (59), and the voltage dividing resistor (58) and the variable resistor are connected. (60) the voltage across the series circuit of the is kept constant, the voltage V _R applied to the control circuit from a remote controller (B) (40) is kept constant as shown in the above formula (70) Be done.
When the user operates the temperature setting variable resistor (60), the voltage V _R changes accordingly. Then, the combustion is controlled by the operation of the control circuit (40), and the hot water supply temperature is maintained at a substantially set temperature.

When the user turns off the operation switch (7) after a lapse of time, the operation display lamp (13) is turned off. Also, the input voltage of the positive input terminal of the amplifier (61) drops sharply,
The output of the amplifier (61) drops sharply. Then, the seventh transistor (59), the sixth transistor (54), and the fifth transistor (50) are turned off. Therefore, the current flowing through the remote controller (B) is greatly reduced, and a voltage substantially equal to the power supply voltage is passed through the voltage input line (48) to the control circuit (40).
In addition, the control circuit (40) operates to stop the combustion of the water heater (A).

According to the remote controller configured as described above, the voltage applied from the remote controller (B) to the main controller (C) is remote from the main controller (C) with the start of combustion of the water heater (A). Even if the current flowing to the controller (B) changes, the constant voltage circuit (56) keeps it constant, and the variable resistance (6
It will be decided by the operation of 0). Therefore, a signal is added to the current flowing from the main control section (C) to the remote control decision (B), the current is changed, and the combustion state of the water heater is displayed on the combustion display lamp (8) according to the current level. Also, the signal from the remote controller (B) to the main controller (C) can be prevented from changing, and the malfunction in the control circuit (40) can be prevented.

(G) Effect of the Invention As is apparent from the above description, the present invention is such that when the voltage signal or the current signal supplied from the main control unit to the remote controller changes according to the operation of the device, the voltage signal or the current signal is changed. Level is detected by the remote controller and the operating status of the device is displayed on the remote display according to the detected level.
Not only is it easy to use, but the current signal or voltage signal from the remote controller to the main controller becomes constant due to the operation of the constant current circuit or constant voltage circuit. Even if a voltage signal or a current signal supplied to the setting section changes, there is no concern that the operation signal corresponding to the operation in the setting section is affected, so that complicated and precise remote control can be performed.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a schematic circuit diagram of a remote control device, and FIG. 2 is a schematic circuit of a remote control device shown as another embodiment. It is a figure. (A) ... hot water heater (equipment), (B) ... remote controller,
(C) ... Main control unit, (8) ... Combustion display lamp (display), (11) ... First constant voltage diode (voltage level detecting means), (15) ... Constant current circuit, (17) ) …… Setting part (variable resistance), (30), (31) …… Wiring, (53) …… Current level detection means, (56) …… Constant voltage circuit, (60) ……
Setting part (variable resistance).

Claims (2)

[Claims] 1. A main control unit for controlling the operation of a device and emitting a voltage signal according to the operation of the device, and a voltage signal according to the operation of the device is supplied from this main control unit through a pair of wires. And a remote controller that outputs a current signal according to the operation of the setting unit to the main control unit via the wiring,
The remote controller has a constant current circuit that outputs a current signal according to the operation of the setting unit, a voltage level detection unit that detects the level of the voltage signal according to the operation of the device, and a detection level of this voltage level detection unit. A remote control device comprising: a light emitting element for displaying an operation of a device that lights up in response to the operation. 2. A main control unit for controlling the operation of the device and emitting a current signal according to the operation of the device, and a current signal according to the operation of the device is supplied from the main control unit via a pair of wires. And a remote controller that outputs a voltage signal according to the operation of the setting unit to the main control unit via the wiring,
The remote controller has a constant voltage circuit that outputs a current signal according to the operation of the setting unit, a current level detection unit that detects the level of the current signal according to the operation of the device, and a detection level of the current level detection unit. A remote control device according to claim 1, further comprising: a display device that displays an operating state of the device.