JPH02223729A - Combustion control device - Google Patents

Abstract

PURPOSE:To obtain a combustion control device which is easy of identifying the type of an apparatus and excellent in economization by introducing a procedure wherein switches of the device are set for a specific condition, the power supply thereto is turned on, and what combustion-controlling function it has is made to be shown on an existing display device. CONSTITUTION:To input ports 10-13 of a microcomputer 1 are connected to respective terminals of switches 2-5 as outside switches such as a temperature- test-setting switch, a timer-setting switch, and a timer-time-setting switch with the other respective terminals of such switches connected to VDD. With those outside switches 2-5 set to a preliminarily set specific condition, the supply of electric power makes a display unit 19 show the data indicating the combustion control function thereby set. Thus by indication in characters on a display 19 it is easily ascertainable what combustion control function a combustion control device has. Thus a combustion control device which is easy of identifying the type of an apparatus and excellent in economization is obtainable.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a combustion control device for a heater or the like.

(Prior Art) In the past, heaters were produced in small quantities in large quantities, but in recent years, in response to user demands, small quantity production of many models has become mainstream.

By the way, when making multiple models, there are cases where a part of the combustion control function is changed to change the model. For example, there are cases where the model is changed by changing the state of change in combustion amount.

In such cases, changing the design and manufacturing line for each model would be inefficient and uneconomical, so for example, a microcomputer could be programmed with various functions and connected to specific input terminals. The functions can be changed by turning the switch on or off and setting which program to use. In this case, jumper wires, dip switches, etc. are used as the switches, and these are built into the housing of the heater so that they cannot be operated by the user.

When the model is changed in this way, it is impossible to distinguish from the outside at all, so for example, after going through an inspection process, a stamp or the like is applied to distinguish the model.

(Problem to be Solved by the Invention) However, if the models are distinguished by stamps, etc. in this way, it is necessary to search for and confirm the place of the stamp when checking later, and the characters cannot be confirmed due to dirt etc. There were some problems that made it difficult to confirm.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a combustion control device that allows easy identification of the model and is highly economical.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a control device that sets various combustion control functions according to various input signals generated by setting operations of a setting input section, and also includes a temperature setting switch, In a combustion control device that includes various external switches such as a timer set switch, operates the control device to control combustion based on a set combustion control function by operating the external switch, and displays at least an ambient temperature on a display device. a display control means for displaying information indicating a set combustion control function on a display device when the power is turned on while various external switches are operated with specific preset contents; A display canceling means is provided for canceling the display state of information indicating the combustion control function by the display device when various external switches are operated with specific preset contents while the combustion control function is being performed.

(Function) In the present invention having such a configuration, the combustion control function for the control device to perform the combustion control operation is set by the setting operation of the setting input section.

In this way, when the power is turned on for the control device with the combustion control function set, by operating various external switches with specific preset contents before turning on the power, the control device becomes a display device that originally displays the ambient temperature during combustion operation. Display information indicating the combustion control function set in the . Therefore, it is possible to confirm what kind of combustion control function is set in the present device from the display on the display device.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is an input port lo, It.

12+! 4 and output boat OO+ 01 + 02
+03 + OJ, 05.06, OA, OB are provided, as well as an electromagnetic pump for fuel supply, a carburetor heater,
For inputting signals from a combustion section (not shown) consisting of an igniter, an air supply motor, etc., an output boat for controlling, and some sensors (not shown) such as a room temperature sensor, a carburetor sensor, etc. It is a one-chip microcomputer equipped with an input board, etc.

Input boat of the microcomputer 1! . .

11+ '2* 13 is a switch @ 2. as an external switch such as a temperature setting switch, a timer setting switch, a timer time setting switch, etc. whose one end is connected to VDD. ■3. ■4. ■The other ends of 5 are connected to each other. And also the input ports IO, Il, I2 . I, are grounded via pull-down resistors 6, 7, and 8.9, respectively.

The input port I4 of the microcomputer 1 is connected to one end of a jumper switch 11 of a setting input section, which has one end connected to VDD via a resistor 10 and the other end grounded. The jumper switch 11 is configured to determine whether to turn it on or off depending on whether a jumper wire is connected or not.

Output port O8゜o, l of the microcomputer 1
o21 o31 o4. A display device 19 consisting of two-digit 7-segment display elements is connected to o51 and o6 via resistors 12, 13, 14.15, and 16.17°18, respectively.
segment signal lines are connected.

Further, the output port OA of the microcomputer 1 is connected to the base of a PNP type first transistor 21 via a resistor 20, and the output port 08 is connected to the base of a PNP type second transistor 23 via a resistor 22. Connected.

The emitter of the first transistor 21 is connected to VDD, and the collector is connected to the upper digit designation line of the display device 19. Further, the emitter of the second transistor 23 is connected to VDD, and the collector is connected to the lower digit designation line of the display device 19. Note that resistors 24 and 25 are connected between the emitter and base of each of the transistors 21 and 23, respectively.

The microcomputer 1 is designed to perform the control shown in FIGS. 2 and 3 based on program data set internally.

In FIG. 2, when the power is turned on and the program starts, interrupts (INT) are enabled.

Then, it is checked whether both the switch (2) and the switch (3), which are specific operation contents set in advance, are turned on.

If both switches 2 and 3 are not on, the program immediately proceeds to the normal combustion control sequence. In this combustion control sequence, the display device 19
By operating various switches Q~02~5, room temperature, set temperature, timer set time, etc. are displayed.

If the switches 21 and 3 are both on, then it is checked whether the input port 4 is at a high (H) level. If it is at a high level, the F flag provided in the memory of the microcomputer 1 is set to "0", and the display data of "Fl", which is information indicating the combustion control function, is displayed in the display area also provided in the memory. Set. If the low (L) level is reached, the F flag is set to "1" and display data of "F2", which is information indicating the combustion control function, is also set in the display area. (
(Display control means) Then, it waits for the ON input of the switch (5), which is a specific operation content set in advance.

When the switch 05 is turned on in this state, a blank code is set in the display area to turn off the display. (Display cancellation means) Then, the routine shifts to a normal combustion control sequence.

FIG. 3 shows interrupt control performed at a predetermined cycle. When an interrupt occurs, the A flag provided in the memory of the microcomputer 1 is checked. If the A flag is "1", the upper digit data of the display area is output from the output ports Oo to 06 to the display device 19, and a low level is output to the output port OA.
Outputs high level to. Then, the A flag is inverted to "0".

Furthermore, if the A flag is "0", the lower digit data of the display area is output from the output ports Oo to 06 to the display device 19, and a high level is output to the output port OA, and a low level is output to the output port OB. . and inverts the A flag to "1".

This program control is for dynamically displaying each digit on the display device 19.

In this embodiment having such a configuration, the combustion control program selected by the microcomputer 1 changes depending on whether or not a jumper wire is connected to the jumper switch 11, and the combustion control function is changed.

For example, when a jumper wire is connected to jumper switch 11 and switch @2 and switch ■3 are both turned on and the power is turned on, the input port!
Since 4 is a low level, "1" is set in the F flag, and display data of "F2" is set in the display area.

The display device 19 is then dynamically controlled by the interrupt control to display the characters "F2".

In addition, when the jumper wire is not connected to jumper switch 11, switch 2 and switch [F]
3 are both turned on and the power is turned on, since the input port It is at a high level, the F flag is set to "0" and the display data of "Fl" is set in the display area.

17, the display device 19 is dynamically controlled to display the characters "Fl" by the interrupt control.

In this way, it is possible to easily confirm which combustion control function this device has by displaying the characters on the display device 19. Furthermore, the display device 19 displays the room temperature, set temperature, and timer time during normal combustion operation, so there is no need to provide a separate display device.

In other words, it is highly economical.

In the above embodiment, a jumper switch is used as the setting input section, but the setting input section is not necessarily limited to this, and a dip switch or the like may be used.

[Effects of the Invention] As detailed above, according to the present invention, by performing a specific Swiss-Sochi operation and turning on the power, it is possible to tell the existing display device what kind of combustion control function the present device has. Since it is possible to display the following information, it is possible to easily check the performance, and it is possible to provide a combustion control device that is highly economical.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a circuit diagram, FIG. 2 is a flowchart showing main part program control, and FIG. 3 is a flowchart for dynamically displaying a display device. 1... One-chip microcomputer, 2-5...
- Switch (external switch), 11...Jumper switch (setting input section), 1...Display device. Applicant's Representative Patent Attorney Takehiko Suzue

Claims (1)

[Claims] A control device is provided for setting various combustion control functions in accordance with various input signals generated by setting operations of a setting input section, and is also provided with various external switches such as a temperature setting switch and a timer setting switch. In a combustion control device that causes the control device to operate combustion control based on a set combustion control function by operating an external switch, and displays at least an ambient temperature on a display device, the control device controls the various external switches to perform a combustion control function based on a preset combustion control function. display control means for displaying information indicative of the set combustion control function on the display device when the power is turned on while the information is being displayed on the display device; A combustion control device comprising a display canceling means for canceling the display state of information indicating a combustion control function by the display device when an external switch is operated with specific preset contents.