JP2902737B2 - Combustion control device - Google Patents

Description

The present invention relates to a combustion control device used in fan heaters, hot air heaters, hot water heaters, and the like that use oil or gas as fuel.

(B) Prior art As a liquid fuel combustion apparatus of this type, the applicant has a microcomputer having a central processing unit, a program memory and a data memory, etc., and a switch, a sensor and a setting provided on the input side of the microcomputer. And a combustion drive means provided on the output side of the microcomputer, processes signals from the switches, sensors and setting device based on a combustion processing program stored in a program memory, and issues a combustion processing command to the combustion drive means. A program memory (EEPROM) that controls the combustion of a combustion device by providing
And a combustion control device in which combustion control data is stored in the EEPROM (Japanese Patent Application No. 1-155109).
issue).

In this combustion control device, data necessary for combustion control and data related to combustion can be electrically written to or read from the EEPROM at any time, and these data are not lost even if the power is turned off. Therefore, there is an advantage that it is excellent in usability, is rich in serviceability, and can expect accurate combustion control.

(C) Problems to be Solved by the Invention In the above-described combustion control device, not only writing of initial data to the EEPROM, but also erasing of data must be performed by sending a signal from the data setting board to the microcomputer by communication. However, there is a disadvantage that combustion control data such as the number of times of occurrence of an error cannot be easily deleted.

The present invention has been made in view of the above-mentioned facts, and enables unnecessary combustion control data, such as the number of times of occurrence of an error, to be easily deleted, and furthermore, a description of a product can be made while deleting data. The purpose is to do.

(D) Means for Solving the Problems The present invention provides a microcomputer having a program memory (EEPROM) capable of electrically writing and erasing data, and a plurality of microcomputers provided on the input side of the microcomputer. Operating means, and a sensor, comprising a combustion drive means provided on the output side of the microcomputer, and a display unit, controlling the combustion of the combustion device by executing a program stored in the microcomputer, and,
In a configuration in which combustion control data such as the number of times of occurrence of an error is written in the EEPROM, at least a part of the combustion control data in the EEPROM is erased by a specific operation of one or more operation means, and a display unit is provided. , A demo display of an operation mode, a failure mode, an abnormal mode, and the like is performed.

(Operation) In this way, usually, the operation mode selection, temperature,
Unnecessary combustion control data can be erased only by specifying the operation means used for setting the time and the like, and the display unit displays a demonstration such as an operation mode, a failure mode, and an abnormal mode. Therefore, it is possible to explain the product to the customer, and the convenience is improved.

(F) Embodiment Hereinafter, an embodiment in which the present invention is applied to an oil fan heater will be described.

FIG. 5 shows an oil fan heater to which the present invention is applied (1).
And an outer case (3) having a warm air outlet (2) in the center of the front and an air inlet (not shown) in the back.
Inside, a burner (4), a hot air fan (5), a refueling tank (6) (7) that can be freely taken in and out, and the like are stored. An operation panel (8) is provided at the front of the top surface of the outer case (3).
Is provided.

As shown in FIG. 6, the operation panel (8) has an operation switch (9), a three-hour extension switch (10), a good morning timer switch (11), and a second-speed ignition switch (1).
2), tatami mat select switch (13), up key (14) and down key (15) for temperature setting, plus key (16) and minus key (17) for timer time setting,
A plus key (18) and a minus key (19) for setting the current time and a display section (20) are provided. The display unit (20) has a 4-digit liquid crystal digital display unit (21),
A liquid crystal message that displays characters such as “current time”, “timer time”, “current temperature”, and “desired temperature” and numbers indicating the tatami mats of “6”, “8” and “10” as necessary. A display unit (22) is provided. As the operation switch (9), an on / off switch which is turned on at the first press and turned off at the second press (at the time of re-operation) is used, and other switches and keys are turned on only when pressed. A tact switch or the like is used.

FIG. 1 shows a combustion control device for an oil fan heater.

In FIG. 1, reference numeral (23) denotes a microcomputer (hereinafter, referred to as a microcomputer) having a central processing unit (CPU), a program memory (ROM), a data memory (RAM), and a clock function and a timer function. In addition, on the input side of the microcomputer (23), a room temperature sensor (24), a burner thermistor (25), a frame rod (26), and the like are provided in addition to the switches and keys described above. The microcomputer (2
On the output side of 3), a hot air fan (5) and a burner motor (2
7), an ignition plug (28), a fuel pump (29), a vaporization heater (30), a display unit (20) and the like are provided.

When the operation switch (9) is turned on, the microcomputer (23) executes the program stored in the program memory (ROM) to cause the burner (4) to start combustion based on a predetermined sequence, Operate the wind fan (5). Further, data of the temperature (for example, 10 ° C. to 30 ° C.) set by the up key (14) and the down key (15) for temperature setting is stored in the data memory, and the temperature and the room temperature sensor (24) The temperature difference from the detected room temperature is obtained, and the amount of combustion in the burner (4) is adjusted according to the temperature difference. This heating operation is automatically terminated in three hours, and if the three-hour extension switch (10) is pressed before the lapse of three hours, the heating operation is extended by three hours from that point. Also, when the good morning timer switch (11) is pressed, the heating operation is temporarily stopped, and is preset by the plus key (16) and the minus key (17) for setting the timer time and stored in the data memory. Resume at that time. The second-speed ignition switch (12) is turned on by the vaporization heater (30) even when the operation switch (9) is turned off.
Is used to gasify and burn kerosene immediately after the operation switch (9) is turned on. The tatami mat select switch (13) is used to set the maximum combustion amount suitable for the room. belongs to. The selection of the maximum combustion amount can be performed while viewing the display of the number of tatami mats of "10", "8" or "6" on the message display section (22).

The microcomputer (23) is provided with a program memory (EEPROM) capable of writing and erasing data. The input side of the microcomputer (23) has a plurality of switches (3) for inputting data to the EEPROM, recalling the EEPROM data, and displaying the data on the digital display section (21).
1) A memory input / output device (34) having (32) and (33) is provided. This memory input / output device (34) is built in the exterior case (3) so as to be hardly visible. Various data are stored in the EEPROM using the memory input / output device (34) and the data setting port (35).

That is, the maximum rotation speed and the minimum rotation speed of the burner motor (27), the maximum rotation speed and the minimum rotation speed of the hot air fan (5), the maximum frequency and the minimum frequency of the fuel pump (29), and the current value of the flame rod (26). Combustion control data such as an alarm set value and a fire set value which are compared with the detected temperature of the burner thermistor (25) and a heater on set temperature and a heater off set temperature which are compared with the detected temperature of the burner thermistor (25) are stored in the switch (31) of the memory input / output device (34). By operating the data setting board (35)
Sent to the microcomputer (23) by communication from
Stored in OM. Therefore, the microcomputer (2
There is no need to provide a resistor matrix circuit outside of 3),
The circuit board of the control device can be made compact.
As shown in FIGS. 2 and 3, the room temperature sensor (2
4) Detected temperature and up key (14) and down key (1
5) Combustion amount characteristics against temperature difference from set temperature,
The data input operation for obtaining the hot air volume characteristics with respect to the combustion volume characteristics can be performed easily and accurately digitally, and the monitoring of the combustion state by the current of the flame rod (26) and the control of the vaporization heater (30) are precisely performed. , And with high accuracy.

The microcomputer (23) counts the time while the operation switch (9) is turned on, counts the time during combustion, and accumulates the counted times to obtain EE.
They are stored in PROM. If an error occurs during the execution of the program, the number of occurrences is accumulated and stored. Since the data in the EEPROM does not disappear even after a power failure, the data such as the total use time and the total combustion time can be called out by operating the switch (32) and displayed on the digital display section (21).

The program shown in FIG. 4 is stored in the program memory (ROM), and the microcomputer (23) performs the following processing by performing a specific operation of a plurality of switches.

That is, when the operation switch (9) is turned on while simultaneously pressing the 3-hour extension switch (10) and the good morning timer switch (11), the microcomputer (23) erases only the error occurrence count data from the EEPROM combustion control data. (0
After that, a demo is displayed on the display unit (20).
In the demonstration display, first, all characters and numbers are displayed on the display unit (20), followed by various operation modes, failure modes,
The display in the abnormal mode is performed in order. This demonstration display is repeated until the operation switch (9) is turned off.

In the above-described embodiment, only the error occurrence count data is deleted by the specific operation of the switches (9), (10), and (11) as the operation means. Other combustion control data may be deleted by a specific operation of the individual switches or keys.

(G) Effect of the Invention Since the present invention is configured as described above, not only can data relating to combustion control be electrically written and read into the EEPROM at any time, but also a serviceman is not required after repair. The usability can be greatly improved, for example, data such as the number of errors can be deleted on the spot. Moreover, since the demonstration display can be performed by the operation of erasing the EEPROM data, it is very convenient for sales staff and service personnel to explain the product while erasing unnecessary data.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which the combustion control device of the present invention is applied to an oil fan heater. FIG. 1 is a block diagram of a combustion control device of the oil fan heater, and FIG. 2 shows the relationship between the differential temperature and the amount of combustion. Characteristic explanatory diagram, FIG. 3 is a characteristic explanatory diagram showing a relationship between a combustion amount and a hot air amount, FIG. 4 is a flowchart showing an example of a program stored in a microcomputer,
FIG. 5 is a perspective view of an oil fan heater, and FIG. 6 is an enlarged explanatory view of an operation unit. (4) Burner (combustion device), (9) to (13) Switch (operating means), (14) to (19) Key (operating means), (23) Microcomputer, ( 24) Room temperature sensor.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23N 5/00 F23N 5/20-5/26 G06F 15/78 G11C 17/00

Claims (1)

(57) [Claims] 1. A microcomputer incorporating a program memory (EEPROM) capable of electrically writing and erasing data, a plurality of operation means and sensors provided on an input side of the microcomputer, and a microcomputer. A combustion drive unit provided on the output side of the microcomputer and a display unit, and controls the combustion of the combustion device by executing a program stored in the microcomputer, and writes combustion control data such as the number of times of occurrence of an error into the EEPROM. In such a configuration, at least a part of the combustion control data of the EEPROM is erased by a specific operation of one or a plurality of operation means, and a demonstration of an operation mode, a failure mode, an abnormal mode, etc. is displayed on a display unit. A combustion control device characterized in that display is performed.