JP2589206B2 - 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 program memory (EEPROM) that can electrically write and erase combustion control data, and an input side of the microcomputer. Combustion control means provided on the output side of the microcomputer and an operation switch and setting operation means provided on the microcomputer, wherein the combustion of the combustion device is controlled by executing a program stored in the microcomputer. A control device has been proposed (Japanese Patent Application No. 1-155109).

In this combustion control device, data necessary for combustion control and data related to combustion are electrically written to the EEPROM,
It can be recalled, and even if the power is turned off, these data will not be lost, so it is easy to use,
It is rich in service and has the advantage that accurate combustion control can be expected.

(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 and rewriting of data must be performed by sending a signal from the data setting board to the microcomputer by communication. Therefore, there is a disadvantage that the combustion control data cannot be easily changed.

The present invention has been made in view of the above-mentioned facts, and has as its object to enable combustion control data to be changed easily and without error.

(D) Means for Solving the Problems The present invention is provided with a microcomputer having a program memory (EEPROM) capable of electrically writing and erasing combustion control data, and a microcomputer provided on the input side of the microcomputer. An operation switch, a setting operation means and a specific operation means, and a combustion drive means provided on the output side of the microcomputer, wherein the combustion of the combustion device is controlled by executing a program stored in the microcomputer. , The combustion control data stored in the EEPROM is changed based on the operation of the setting operation means when the operation switch is turned on and the specific operation means is operated.

(E) Operation With this configuration, simply turning on the operation switch and operating the specific operation means changes the combustion control data using the setting operation means normally used for setting time, temperature, and the like. The combustion control data can be changed to any value at any time and anywhere. Further, since the operation switch is turned on, the optimum combustion control data can be set while observing the combustion state, and the operation of the specific operation means is required. Therefore, there is no fear that the combustion control data is erroneously changed.

(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 housed. 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 number 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). Also,
The display unit (20) has a 4-digit liquid crystal digital display unit (21)
And "current time", "timer time", "current temperature",
A liquid crystal message display (22) is provided for displaying characters such as "desired temperature" and numerals indicating the number of tatami mats of "6", "8" and "10" as necessary. 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. The operation switch (9) described above is provided on the input side of the microcomputer (23).
Room temperature sensor (24), burner thermistor (25), frame rod (2
6) etc. are provided. The output side of the microcomputer (23) is provided with a hot air fan (5), a burner motor (27), a spark plug (28), a fuel pump (29), a vaporization heater (30), a display unit (20), and the like. ing.

When the operation switch (9) is turned on, the microcomputer (23) executes a program stored in a program memory (ROM) to cause the burner (4) to start combustion based on a predetermined sequence, and Fan (5)
Drive. In addition, the temperature set by the up key (14) and the down key (15) for temperature setting (for example,
(10 ° C to 30 ° C) is stored in a data memory (RAM), and the difference between this temperature and the room temperature detected by the room temperature sensor (24) is obtained. Adjust the amount of combustion at This heating operation is automatically terminated in three hours, and if the three-hour extension switch (10) is pressed before the elapse of three hours, the heating operation is extended by three hours from that point. Also,
When the good morning timer switch (11) is pressed,
After being temporarily stopped, the heating operation is restarted at the time set in advance by the plus key (16) and the minus key (17) for setting the timer time and stored in the data memory. The second-speed ignition switch (12) preheats the burner (4) to an appropriate temperature by the vaporizing heater (30) even when the operation switch (9) is turned off, and immediately supplies kerosene immediately after the operation switch (9) is turned on. The tatami mat select switch (13) is for setting the maximum combustion amount suitable for the room. 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 a specific switch (specific operation means) (33) is provided. This memory input / output device (34) is built in the outer case (3) so as to be hardly noticeable. Various data are stored in the EEPROM using the memory input / output device (34) and the data setting board (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) By operating the data setting board (35)
Sent to the microcomputer (23) by communication from
Stored in OM. Therefore, there is no need to provide a resistance matrix circuit outside the microcomputer (23), and the circuit board of the control device can be made compact. Also, as shown in FIGS. 2 and 3, a combustion amount characteristic and a combustion amount characteristic with respect to a temperature difference between the detected temperature of the room temperature sensor (24) and the set temperature by the up key (14) and the down key (15). Can easily and accurately input data to obtain the hot air volume characteristics for the air, and monitor the combustion state using the current of the frame rod (26) and control the vaporization heater (30) precisely and accurately. Can do well.

The microcomputer (23) counts the time while the operation switch (9) is turned on, counts the time during combustion, accumulates the counted time, and stores the accumulated time in the EEPROM. 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 when a power failure occurs, for example, by operating the switch (32), data such as the total use time and the total combustion time is called, and the data is displayed on the digital display (2
1) can be displayed.

The program shown in FIG. 4 is stored in the program memory (ROM), and the specific switch (33) of the input / output device (34) is pressed to be turned on while the operation switch (9) is turned on. Thereby, the microcomputer (23) performs the following processing.

That is, if the specific switch (33) is turned on while the operation switch (9) is turned on and combustion is being performed, the microcomputer (23) performs processing in the specific mode. now,
Assuming that the temperature difference between the set temperature and room temperature is large and the amount of combustion in the burner (4) is maximum, every time the plus (18) or minus (19) key for setting the current time is pressed once Then, the maximum frequency data of the fuel pump (29) stored in the EEPROM is increased or decreased by 0.1 Hz and stored as new data. Similarly, assuming that the temperature difference between the set temperature and the room temperature is small and the amount of combustion in the burner (4) is minimized, the plus key (18) or the minus key (19) is set to one.
Each time the button is pressed, the minimum frequency data stored in the EEPROM is increased or decreased by 0.1 Hz and stored as new data. In addition, these data are displayed on the digital display (21) while the specific mode is set. To release the specific mode, the operation switch (9) may be turned off or the specific switch (33) may be turned on again.

According to the present embodiment, by simply operating the specific switch (33) while the operation switch (9) is being turned on, the EEPR is used by using the minus key (19) of the plus key (18) for setting the current time.
The maximum frequency and minimum frequency data stored in the OM can be rewritten, and these combustion control data can be changed anytime, anywhere, and the service is rich. Further, since combustion is performed by turning on the operation switch (9), optimal combustion control data can be set while observing the combustion state. Of course, the specific switch (33) is located in the outer case (3) of the oil fan heater (1) (for example, on a circuit board) so that it is hard to be noticed. You don't have to worry about data being changed indiscriminately.

In the above-described embodiment, among the various combustion control data stored in the EEPROM, the data of the maximum frequency and the minimum frequency of the fuel pump (29) can be changed at any time by a specific operation. Data may be changed at any time. In this case, another switch or key for setting may be assigned to each combustion control data and used.

(G) Effects of the Invention Since the present invention is configured as described above, it is possible not only to electrically write and delete the combustion control data in the EEPROM, but also to change the combustion control data anytime and anywhere. It can improve usability and serviceability. In addition, since the optimal combustion control data can be set while observing the combustion state, for example, adjustment at the time of shipment and on-site air-fuel efficiency adjustment according to altitude and oxygen concentration can be easily performed, and the combustion control data can be changed. Requires the operation of the specific operation means, so that an erroneous operation can be prevented.

[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) Operation switch (10) to (13) Switch (setting operation means)
(14) to (19) ... key (operation means for setting), (S) ...
... Specific switch (specific operating means), (23) ... Microcomputer.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Osawa 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Yuichi Yoshizawa 2-18-18 Keihanhondori, Moriguchi-shi, Osaka (56) References JP-A-1-310229 (JP, A) JP-A-63-127021 (JP, A) JP-I-1-16932 (JP, Y2)

Claims (1)

(57) [Claims] A microcomputer incorporating a program memory (EEPROM) capable of electrically writing and erasing combustion control data, an operation switch provided on an input side of the microcomputer, an operation means for setting, and a specification unit. Operating means, a combustion drive means provided on the output side of the microcomputer, wherein the operation switch is turned on, in which the combustion of the combustion device is controlled by executing a program stored in the microcomputer, and A combustion control device configured to change the combustion control data stored in the EEPROM based on the operation of the setting operation means when the specific operation means is operated.