JPH11316019A - Combustion device energization circuit - Google Patents

Abstract

(57) Abstract: Provided is an energization circuit of a combustion device that eliminates generation of power consumption in an operation switch OFF state. SOLUTION: A load group 15 including a load having a delay operation even after an OFF operation of an operation switch 11, a control unit 17 for controlling the load group 15, and an opening / closing operation in synchronization with opening / closing of the operation switch 11. A first opening / closing means 14 for performing the operation, a transmitting means 12 for transmitting an opening / closing signal of the operation switch 11 to the control unit, and a second opening / closing means 18 for receiving a signal from the transmitting means 12 and performing a predetermined opening / closing operation; The power supply to the control unit 17 is controlled by the first opening / closing means 14 and the second opening / closing means 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric circuit of a combustion device which does not generate standby power when the device is in an OFF state.

[0002]

2. Description of the Related Art A combustion apparatus burns various fuels, converts the combustion heat into hot air or hot water via a heat exchanger or the like, and uses it for heating or hot water supply. It has a part that differs from general home appliances.
In other words, in general home appliances, the device is started and stopped in synchronization with the operation of the operation switch,
In the case of a combustion device, it is not possible to stop the equipment in synchronization with the operation of turning off the operation switch at the time of the stop operation because the fuel is burned and the heat exchanger is heated by the combustion heat. It is necessary to operate a part of the load later to perform, for example, a blowing operation.
For this reason, in the conventional combustion apparatus, power is always supplied to the control circuit to operate this load, and the control circuit is in an energized state.

FIGS. 3 and 4 show an example of a conventional energizing circuit. In FIG. 3, 1 is an operation switch, 2 is a load,
Is a control unit for controlling the load 2, 4a is a light emitting side of the transmission means 4 for transmitting an open / close signal of the operation switch 1, and 4b is a light receiving side. Reference numeral 5a denotes a coil side of the opening / closing means 5 operated by a signal from the control unit 3, and reference numeral 5b denotes an opening / closing contact side so as to control the energization of the load 2.

[0004] The operation of the energizing circuit configured as described above will be described. First, when the operation switch 1 is in the OFF state, the control unit 3 is energized to enter a standby mode for confirming the presence or absence of an operation signal. Next, when the operation switch 1 is turned on to enter the operation state, a current flows to the light emitting side 4a of the transmission means 4, and light emission is repeated at a half-wave cycle synchronized with the power supply frequency. This light emission is detected by the light receiving side 4b and input to the control unit 3 as a driving signal as a dynamic signal. The control unit 3 starts the driving operation in response to the driving signal input by the dynamic signal, outputs an ON signal to the coil side 5a of the switching means 5, closes the switching contact 5b, and executes a predetermined control operation. The load 2 is controlled to start the combustion operation.

Next, the stop operation will be described. When the operation switch 1 is turned off to stop, the current does not flow to the light emitting side 4a of the transmission means 4, and the light receiving side 4b is turned off. As a result, no operation signal is input to the control unit 3, and the control unit 3 controls the load 2 so as to stop the combustion operation, and performs a delay operation in the load 2 such as a blower motor (not shown). For the required load, the operation is continued for a predetermined time. After a lapse of a predetermined time, the coil side 5a of the opening / closing means 5 is turned off, and the opening / closing contact 5b is opened.

As another method, as shown in FIG. 4, an operation switch 1 is directly connected to a control section 3 and an energizing circuit is simplified by inputting an ON or OFF operation signal as a static signal. There is. Also in this circuit configuration, the control unit 3 is always supplied with power and checks the open / close signal of the operation switch 1. Then, when the closing signal of the operation switch 1 is input, the control unit 3 starts the driving operation, outputs an ON signal to the coil side 5a of the opening / closing means 5, closes the opening / closing contact 5b, and sets a predetermined state. The load 2 is controlled by the control operation to start the combustion operation. When the open signal of the operation switch 1 is input,
The control unit 3 controls the load 2 so as to stop the combustion operation,
For a load requiring a delay operation such as a blower motor (not shown) in the load 2, the operation is continued for a predetermined time. Then, after a lapse of a predetermined time, the coil side 5a of the opening / closing means 5
Is turned off, and the switching contact 5b is opened.

[0007]

However, the conventional power supply circuit of the combustion device includes a load having a delay operation after the operation switch is turned off, such as a blower motor, so that the load is synchronized with the opening / closing operation of the operation switch. Therefore, a configuration for supplying power to the load cannot be adopted. That is, the power supply to the load by the opening / closing operation of the operation switch needs to be performed via the control unit by the operation switch opening / closing signal.
For this reason, the control unit is configured to be always supplied with power, and power is consumed, albeit slightly, even when the operation switch is turned off.

In recent years, while reduction of energy consumption has become a social problem, reduction of power consumption in equipment is a major problem.
It is an object to eliminate power consumption during FF.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention controls an operation switch for instructing operation ON / OFF, a load group forming a combustion operation, and controls the operation of the load group. A control unit, a first opening / closing means for performing an opening / closing operation in synchronization with the opening / closing of the operation switch, a transmission means for transmitting an operation switch opening / closing signal to the control unit; There is provided a second opening / closing unit for performing an operation, and the control unit is configured so that the supply of power is controlled by the first opening / closing unit and the second opening / closing unit.

According to the above-mentioned invention, the first opening / closing means for performing the opening / closing operation in synchronization with the opening / closing of the operation switch and the second opening / closing means for performing the opening / closing operation by the output of the control section which operates in response to the operation switch opening / closing signal. Since the power supply to the control unit is performed, the power supply to the load group can be performed based on the control operation set in advance by the control unit, and at the time when the power supply to the load group is stopped. Power supply to the control unit is also stopped, and power consumption can be eliminated with the operation switch turned off. Further, since the first opening / closing means and the second opening / closing means control only the power supply to the control section, the opening / closing capacity may be extremely small, so that downsizing and cost reduction can be achieved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A power supply circuit of a combustion apparatus according to a first aspect of the present invention controls an operation switch for instructing ON / OFF of operation, a group of loads forming a combustion operation, and operation of the group of loads. A control unit, a first opening / closing means for performing an opening / closing operation in synchronization with the opening / closing of the operation switch, a transmission means for transmitting an operation switch opening / closing signal to the control unit; There is provided a second opening / closing unit for performing an operation, and the control unit is configured so that the supply of power is controlled by the first opening / closing unit and the second opening / closing unit.

[0012] The first opening / closing means for performing the opening / closing operation in synchronization with the opening / closing of the operation switch and the second opening / closing means for performing the opening / closing operation by the output of the control section which operates in response to the opening / closing signal of the operation switch, control the control section. Since the power supply is performed, the power supply to the load group can be performed based on the control operation set in advance by the control unit, and the power supply to the control unit is stopped when the power supply to the load group is stopped. Power supply is also stopped, and power consumption can be eliminated with the operation switch turned off. Further, since the first opening / closing means and the second opening / closing means control only the power supply to the control section, the opening / closing capacity may be extremely small, so that downsizing and cost reduction can be achieved.

[0013] The power supply circuit of the combustion device according to claim 2 is
The first opening / closing means and the second opening / closing means constitute an OR circuit,
The power supply is controlled.

The power supply to the control unit is constituted by an OR circuit in which the first opening / closing means and the second opening / closing means are connected in parallel, thereby enabling the delay operation after the operation switch is turned off and the delay operation. After completion, power supply to the control unit can be cut off, and power consumption when the operation switch is turned off can be reduced to zero.

The power supply circuit of the combustion device according to claim 3 is
The load group is configured to be connected between the power supplies before passing through the first switching means and the second switching means.

By preventing the load current of the load group from flowing through the first switching means and the second switching means, the switching capacity can be reduced to reduce the size and cost.

Further, the power supply circuit of the combustion device according to claim 4 is
The second opening / closing means is controlled via the control unit, and performs an opening operation after a predetermined delay time has elapsed when an OFF signal of the operation switch is input.

Since the operation of the second opening / closing means is performed based on a control operation set in advance via the control unit, a so-called suicide circuit is formed, and the reliability of the operation and the simplification of the circuit configuration are achieved. Can be achieved.

[0019]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.

First, the configuration of the power supply circuit of the combustion apparatus according to the first embodiment of the present invention will be described with reference to FIG.

Reference numeral 11 denotes an operation switch. Reference numeral 12 denotes a transmission means for transmitting an open / close signal of the operation switch 11. The transmission means includes a light emitting side 12a and a light receiving side 12b.
During the closing operation of 1, a half-wave current synchronized with the power supply frequency flows via the resistor 13 and light emission is repeated. And the light receiving side 1
2b repeats ON / OFF in response to the light emission signal. Reference numeral 14 denotes a first opening / closing means for performing an opening / closing operation in synchronization with the opening / closing of the operation switch 11, and a coil side 14a and an opening / closing contact 14b.
It is composed of Reference numeral 15 denotes a load group that performs a combustion operation, and includes a load that performs a predetermined time delay operation after the combustion of a blower motor (not shown) or the like is stopped. Reference numeral 16 denotes a power transformer for forming a low-voltage circuit, and 17 denotes a control unit formed of a low-voltage circuit.
1 open / close signal is input. Reference numeral 18 denotes a second opening / closing means for performing an opening / closing operation based on a control operation predetermined by the control unit 17.
b.

The switching contact 14 of the first switching means 14
b is connected in parallel with the opening / closing contact 18b of the second opening / closing means to form an OR circuit, which is arranged at a position where the supply of power to the control unit 17 can be controlled. In addition, load group 15
Is connected to a power supply before passing through a parallel circuit of the first switching contact 14b and the second switching contact 18b to supply power, and the control unit 17 controls its operation.

The operation of the power supply circuit of the combustion apparatus having the above configuration will be described. First, the operation switch 11 is turned off.
In this state, the light-emitting side 12a of the transmission means 12 and the coil side 14a of the first opening / closing means 14 are not energized, so that the opening / closing contact 14b of the first opening / closing means 14 is open, and power is supplied to the power transformer 16. However, since the control unit 17 is in the stopped state, the load group 15 is also in the stopped state, and no power is consumed.

Next, when the operation switch 11 is turned on, a half-wave current synchronized with the power supply frequency flows through the light-emitting side 12a of the transmission means 12 via the resistor 13, and light emission is repeated in a half-wave cycle. Coil side 1 of first opening / closing means 14
4a is also energized. When the coil side 14a is energized, the open / close contact 14b is closed so that power is supplied to the low-voltage circuit formed by the power transformer 16 and the control unit 17
Is activated. Then, an operation signal is input to the control unit 17 from the light receiving side 12b of the transmission means 12 in synchronization with the light emitting signal of the light emitting side 12a, and the load group 15 starts the combustion operation based on a predetermined control operation. Further, the control unit 1
7 operates the coil side 18a of the second opening / closing means 18 when an operation signal is input, and closes the opening / closing contact 18b.
As described above, when the operation switch 11 is ON, the first switching contact 14b and the second switching contact 18b are both closed to supply power to the power transformer 16 and operate the load group 15 via the control unit 17. I have to. Further, since the load group 15 is connected between the power supply before passing through the first switching contact 14b and the second switching contact 18b, no load current flows through the first switching contact 14b and the second switching contact 18b, A small switching capacity may be used.

Next, when the operation switch 11 is turned off, no current flows to the light emitting side 12a of the transmitting means 12, and no light emitting signal having a half-wave period is transmitted to the light receiving side 12b. Check the stop status. By stopping the operation, the control unit 17 stops supplying the combustion operation signal to the load group 15 and completes the combustion operation.

When the operation switch 11 is turned off, the power supply to the coil side 14a of the first opening / closing means 14 is also stopped, so that the opening / closing contact 14b is opened. The power supply to the power transformer 16 is maintained by the closed state of the second switching contact 18b. The second opening / closing means 18 includes a controller 17
, The second switching contact 18b is maintained in a closed state to secure an operation state to a load requiring a delay operation after the operation is stopped. I have.

When a predetermined time has elapsed, the control unit 17 stops the operation of the load having the delay operation, and
The operation of the coil side 18a of the switching means 18 is stopped, and the switching contact 18b is opened.

By the opening operation of the second switching contact 18b, power supply to the low-voltage circuit constituted by the power transformer 16 is stopped, and power consumption is completely prevented.

Next, referring to the block diagram of FIG.
7 will be described. First, when the operation is instructed by the operation switch 11, the first switching contact 1 of the first switching means 14 is turned on.
Power is supplied to the control unit 17 from 4b. Control unit 17
Is turned on by this power supply, and when an operation signal is input from the transmission means 12, the second opening / closing means 18 is operated.
A logical sum circuit is formed with b to supply power to the control unit 17. Then, a combustion operation signal is supplied from the control unit 17 to the load group 15 to start combustion. The control unit 17 is configured to be held even after the operation switch 11 is turned off by the operation of the second opening / closing means 18 so that the operation state is continued until the operation of the second opening / closing means 18 is stopped. Has become.

When the stop is instructed by the operation switch 11, the first opening / closing means 14 is turned off and the first opening / closing contact 14 b is opened, but the control section 17 is activated by the second opening / closing means 18. Since it is held, the operation is continued, and the operation of the load having the delay operation in the load group 15 is continued. At the same time, an operation stop signal is input from the transmission unit 12 to the control unit 17, and the control unit 17 continues the delay operation based on the predetermined stop operation.
The second opening / closing means 18 is stopped, and the second opening / closing contact 18b is opened. By stopping the second opening / closing means 18, the power supply to the control unit 17 is stopped, and the operation of the load group 15 is stopped, thereby eliminating power consumption.

As described above, power is supplied to the control unit 17 using the first opening / closing means 14 and the second opening / closing means 18, and the operation of the load group 15 is controlled via the control unit 17. Therefore, even in a load including a load having a delay operation after the operation is stopped, the power consumption can be eliminated in the operation switch OFF state, and the first switching contact 14
Since a load current does not flow between b and the second switching contact 18b, the switching capacity may be small, and the size and cost of the control unit 17 can be reduced.

[0032]

As described above, according to the power supply circuit of the combustion device of the first aspect, the first opening / closing means for performing the opening / closing operation in synchronization with the opening / closing of the operation switch and the operation signal of the operation switch are operated. Since the power supply to the control unit is performed by the second opening / closing unit that performs the opening / closing operation by the output of the control unit, the power supply to the load group can be performed based on the control operation set in advance by the control unit. At the same time, when the power supply to the load group is stopped, the power supply to the control unit is also stopped, and power consumption can be eliminated with the operation switch turned off. Further, since the first opening / closing means and the second opening / closing means control only the power supply to the control unit, the opening / closing capacity may be extremely small, and the size and cost can be reduced.

According to the power supply circuit of the combustion device of the second aspect, the power supply to the control unit is constituted by an OR circuit in which the first switching means and the second switching means are connected in parallel. The delay operation after the OFF operation is enabled, and the power supply to the control unit can be cut off after the delay operation is completed, so that the power consumption when the operation switch is OFF can be reduced to zero.

According to the power supply circuit of the combustion apparatus of the third aspect, the load current of the load group does not flow through the first switching means and the second switching means, so that the switching capacity can be reduced and the size can be reduced. Cost can be reduced.

According to the power supply circuit of the combustion device of the fourth aspect, since the operation of the second opening / closing means is performed based on a control operation set in advance via the control unit, a so-called suicide circuit is formed. As a result, the reliability of the operation and the simplification of the circuit configuration can be achieved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an energization circuit of a combustion device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the circuit.

FIG. 3 is a configuration diagram of an energization circuit of a conventional combustion device.

FIG. 4 is a configuration diagram of the energizing circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Operation switch 12 Transmission means 14 1st opening / closing means 15 Load group 17 Control part 18 2nd opening / closing means

Claims (4)

[Claims] An operation switch for instructing operation ON / OFF, a load group for forming a combustion operation, a control unit for controlling the operation of the load group, and an opening / closing operation in synchronization with opening / closing of the operation switch. First opening / closing means for performing the operation, a transmitting means for transmitting an opening / closing signal of an operation switch to the control unit, and a second opening / closing means for performing a predetermined opening / closing operation in response to the signal from the transmitting means, wherein the control unit A power supply circuit for a combustion device, wherein the supply of power is controlled by the first opening / closing means and the second opening / closing means. 2. The power supply according to claim 1, wherein said first switching means and said second switching means form a logical sum circuit to control power supply.
A power supply circuit for the described combustion device. 3. The power supply circuit according to claim 1, wherein the load group is connected between the power supplies before passing through the first switching means and the second switching means. 4. The second opening / closing means is controlled via a control unit, and when an operation switch OFF signal is inputted,
4. An energization circuit for a combustion device according to claim 1, wherein the opening operation is performed after a predetermined delay time has elapsed.