JPH0141014Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a gas combustion control system that improves the power supply system between a remote controller for switching the combustion capacity of a gas combustor from a remote location and an appliance controller placed near the gas combustor. related to the power supply circuit of the device.

Conventionally, there is a gas combustion controller of this type, which has a block diagram shown in FIGS. Normally, the gas combustor F is placed outdoors for safety reasons, and an appliance controller A for controlling combustion is placed nearby. A kitchen controller B and a bath controller C are installed in the kitchen and bathroom, respectively, where hot water is supplied for convenience of operation from indoors.
is installed to remotely control operations such as starting combustion and switching combustion capacity. FIG. 1a shows an example in which a commercial power source is introduced to the appliance controller A and the appliance is driven. FIG. 2 is a block diagram of the gas combustion controller in accordance with the power supply path of FIG. 1a. As shown in FIG. 2, when there is a power source outdoors, power is introduced through the plug 10, and the control circuit 13 is driven by a full-wave rectified voltage that is rectified through the transformer 11 and diode bridge 112. Igniter 1
4. Start the main valve 15 and pilot valve 16.
In the figure, detailed sequence circuits for each load group such as the igniter 14 by the control circuit 13 are omitted and disclosed. In order to initiate the ignition operation with such a configuration, it is necessary to lead the ignition switch 21 to the kitchen controller B.

However, as shown in FIG. 1b, it is well known that commercial power is generally easily available in the kitchen, and in this case, a power transformer 25 is installed inside the kitchen controller B, which corresponds to the remote controller B.
It is common to install . FIG. 3 is a block diagram of a conventional gas combustion controller according to FIG. 1b. Since the main combustion safety control part is provided in the appliance controller A, if the diode bridge 12 of the control circuit 13 is also arranged on the same printed circuit board, the kitchen controller B can be configured more compactly and inexpensively. However, in this case, four lead wires, lead wires L ₁ and L ₂ , are essential.

Since 8-core cables are standardized as remote cables for such home-use gas combustion controllers, consideration should be given to reducing even one lead wire and using it for other control functions. It is.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control circuit for a gas combustion controller that reduces the number of lead wires between a remote controller and an appliance controller.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a block diagram showing a control circuit of a gas combustion controller according to an embodiment of the present invention.

In FIG. 4, the same reference numerals as in FIGS. 2 and 3 indicate the same parts, and the explanation will be omitted. In FIG. 4, power is supplied from the plug 20 via the transformer 25. The secondary output of this transformer 25 is connected to the cable L ₁ , via the operation switch SW ₂ , 22.
On the _other hand, two diodes 23 and 24 connected in series with opposite polarities are connected in parallel, and a cable is sent from the common cathode of these two diodes 23 and 24 via ignition switches SW ₁ and 21. Connected to L ₃ .

On the other hand, in appliance controller A, cables L ₁ ,
A diode bridge 12 consisting of four diodes D ₁ , D ₂ , D ₃ , D ₄ is connected to both ends of L ₂ , and the full-wave rectified output of this well-known diode bridge 12
V ₁ forms a first rectified power supply and is supplied to the control circuit 13 .

In addition, the cable L ₃ includes a direct igniter 14, a main valve 15,
It is connected to a load group such as a pilot valve 16 having a relatively large current capacity. At the other end of these loads are the diodes D ₁ , D ₂ of diode bridge 12.
connected to the connection point.

Next, the operation of the power supply circuit of this embodiment will be explained. The commercial power supply for the kitchen is plug 20 of kitchen controller B.
When the operating switch 22 is closed, the control circuit 13 is energized via the diode bridge 12 from the cables L ₁ and L ₂ as described above. Subsequently, when the ignition switch 21 is closed,
In the half cycle where the operation switch 22 side of the transformer 25 is positive, the operation switch 22, the diode 23,
Ignition switch 21, cable _L3 , load group 14~
16, the load current flows through the diode D ₂ and the cable L ₂ . In addition, in the negative half cycle, the diode 24, the ignition switch 21, the cable _L3 , the load groups 14 to 16, the diode _D1 , the operation switch 22
flows through. In other words, as a result of currents having the same polarity flowing through the load groups 14 to 16, the kitchen controller B
and the diode of the diode bridge 12 of the instrument controller A.
A second rectified power supply is formed by the four diodes D ₁ and D ₂ , and the full-wave rectified output V ₂ is sent to the igniter 1.
It is supplied to the four-way valve 15 and the pilot valve 16.

In this way, the conventional circuit shown in Fig. 3 requires four lead wires, but in this embodiment, only three lead wires are required by adding two diodes 23 and 24 to the kitchen controller B side. I can do it. Moreover, since the load groups 14 to 16 require current, the thickness of the core wire of the cable must also be thick, but the configuration of the present invention can reduce the number of thick core wires by one.

As described above, according to the control circuit of the gas combustion controller of the present invention, the number of cables can be reduced to three simply by adding a diode to the kitchen controller. Since the device controller is provided with a diode bridge, there is an advantage that the control box can be made compact.

[Brief explanation of the drawing]

Figures 1a and 1b are block configuration diagrams of gas combustion controllers. Figure 1a shows an example in which power can be supplied from the appliance controller, and Figure 1b shows an example in which power can be supplied from the kitchen controller. Figures 2 and 3
Each figure is a configuration diagram of a power supply circuit of a conventional gas combustion controller, and FIG. 4 is a configuration diagram of a control circuit of a gas combustion controller according to an embodiment of the present invention. A... Instrument controller, D ₁ , D ₂ , D ₃ , D ₄ ...
...Diode, B...Kitchen controller, 12...
...Diode bridge, C ... Bath controller, 13 ... Control circuit, L ₁ , L ₂ , L ₃ ... Lead wire, 14 ... Igniter, 15 ... Main valve, 16 ... Pilot valve, 20 ... ...Plug, 21...Ignition switch, 22...Driving switch, 23, 24...Diode.

Claims (1)

[Scope of utility model registration request] The appliance controller is equipped with a control circuit that is energized by the rectified output from the diode bridge and monitors the flame, and a load group consisting of an igniter and a gas valve that are energized by manually operating the ignition switch of the remote controller. In the power supply circuit of the gas combustion controller,
Two diodes having a common cathode as the first common point are connected in series on the secondary side of a transformer that receives power from a commercial power supply to the remote controller, and two diodes having a common anode are connected in series in the above diode bridge. A power supply circuit for a gas combustion controller, characterized in that the ignition switch, the cable, and the load group are connected in series between the second common point of the diodes and the first common point.