JPH02203157A - Combustion controller - Google Patents

Abstract

PURPOSE:To prevent an offensive smell from being discharged from an outlet port and thereby to reduce a smell by stopping a blower for convection for a prescribed period at the time of ignition and extinction and further by blocking up the outlet port. CONSTITUTION:When an operation switch 22 is turned OFF, a combustion control element 21 makes a timer element 21a start to operate, while stopping a burner 3 and a blower 7 for convection and delivering a closing instruction to a variable vane control element 25, so that a outlet port be closed. Accordingly, a burnt gas passes through the blower 7 for convection and discharged backward. At the time point when the timer element 21a comes to end, the combustion control element 21 restarts the blower 7 for convection, delivers an opening instruction to the variable vane control element 25 to open the outlet port so as to cool down the burner 3 and others, while blowing off a remaining heat forward. By stopping the blower for convection at the time of ignition and extinction and further by blocking up the outlet port by a variable vane, thus an offensive smell to be caused by the ignition and the extinction is prevented from being discharged from the outlet port and thus the offensive smell can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustion side jn device for a hot air heater using a combustor.

Conventional technology Generally speaking, this type of hot air heater, such as a fan heater,
As shown in FIG. 5, a burner 102 for burning vaporized fuel is provided in the main body 101, and the combustion gas from the burner 102 is mixed with air from a blower 103 provided on the back of the main body and blown out from a hot air outlet 104. It is designed to heat the room. The warm air outlet 104 is provided with a large number of horizontal louvers to guide the warm air in a substantially horizontal direction. Therefore, since the combustion gas mixed with the hot air is always discharged from the outlet, an odor may be generated if combustion conditions deteriorate. In particular, during ignition and extinguishing, combustion conditions are poor and odors are likely to be emitted. Therefore, when a fire is ignited, the blower 103 is operated later than when the fire is ignited, and when the fire is extinguished, the blower 103 is temporarily stopped and restarted after a predetermined period of time, so that the combustion gas is blown directly from the hot air outlet 104 when the fire is ignited and extinguished. Suggestions are being made to avoid this.

U4B that the invention seeks to solve However, in the above conventional configuration, the louver provided at the hot air outlet is fixed to the main body, so it is always open and odor leaks even when the blower is stopped. It was not possible to completely prevent the ignition and extinguishing odor from coming out of the hot air outlet.

The present invention is intended to solve such problems, and the first purpose is to reduce the odor at the time of ignition, the second purpose is to reduce the odor at the time of extinguishing, and the third purpose is to reduce the odor at the time of fire extinguishing. The purpose is to improve effectiveness.

Means for Solving the Problems In order to solve the above problems, the first combustion control device of the present invention has a configuration in which the operation of the blower is delayed for a predetermined period when the burner is ignited, and the hot air outlet is closed.
The third combustion control device is configured to stop the blower for a predetermined period and close the hot air outlet when the burner is extinguished, and the third combustion control device is configured to close the hot air outlet. This is done using variable blades, and the variable blades are configured to rotate up and down depending on the amount of combustion or the amount of air blown.

Operation The present invention has the above-mentioned configuration, so that in the first combustion control device, the combustion gas at the time of ignition is not discharged from the hot air outlet, so that no odor is felt at the time of ignition. Since the combustion gas is not discharged from the hot air outlet when extinguishing a fire, there is no smell when extinguishing a fire. In the third combustion control device, the hot air outlet is blocked by variable blades installed at the hot air outlet, so combustion gas during ignition or extinguishing is not discharged from the hot air outlet. During operation, the variable blades are rotated up and down depending on the amount of combustion or the amount of air blown, and the blowing direction changes, improving the temperature distribution in the room. Therefore, no odor is felt during ignition and extinguishing, and comfortable hot air heating can be obtained.

Embodiment Hereinafter, embodiments of the present invention will be described based on the drawings. In FIG. 1, 1 is a hot air heater main body, 2 is a hot air outlet, and 3 is a burner provided in the hot air heater main body 1. In this embodiment, a burner that vaporizes and burns kerosene is used. 4 is a combustion tube that covers the upper part of the burner 3, and 5 is a duct provided in the warm air heater main body 1 so as to cover the combustion tube 4, and has an opening 6 formed in the front surface. 7 is a convection blower installed facing the rear of this duct 5, which mixes the indoor air sucked in from outside the hot air heater body 1 with the combustion gas from the combustion tube 4 in the duct 5, and blows the hot air into the hot air outlet 2. It's starting to come out more. 8 is an air outlet frame provided at the opening of the duct 5; 9 is a variable blade provided on the air outlet frame 8 so as to be located inside the hot air outlet 2; and is wide enough to cover the entire air outlet frame 8. It is formed. As shown in FIG. 2, this variable blade 9 is made rotatable as shown by arrow d by passing a shaft 13 protruding from both ends thereof through a metal fitting (not shown) attached to the side plate 1a of the main body of the heater. A stepping motor IO capable of forward and reverse rotation for driving the variable blade 9 up and down is connected thereto.

Reference numeral 20 denotes a control circuit for controlling the hot air heater, and is configured as shown in the block diagram of FIG. Reference numeral 21 denotes a combustion control section consisting of a microcomputer, which starts combustion control in response to a signal from the operation switch 22, a temperature detection section 23 consisting of a thermistor, etc., and a room temperature setting section 2 that sets the room temperature.
The combustion amount is set by comparing the signals from 4. Then, the burner 3 and convection blower 7 are controlled according to the settings, and a setting signal is sent to the variable blade control unit 25. The variable blade control unit 25 drives the stepping motor 10 so that the angle is predetermined based on the setting signal, and controls the variable blade 9.
move up and down.

Next, the control of the combustion control section 21 will be explained using the flowchart shown in FIG.

First, when the machine is stopped, the burner 3 and the convection blower 7 are stopped.
A “close” command is sent to the variable blade control unit 25. Therefore, when the operation switch 22 is turned on, the combustion control section 21 sends an operation command to the burner 3. When the burner 3 is ready for operation, a preparation completion command is sent to the combustion control section 21 and combustion starts.

Upon receiving the signal, the combustion control section 21 starts the internal timer section 21a. At this point, combustion has started, but the convection blower 7 has stopped, and the "close" command has been sent to the variable vane control unit 25, so the air outlet is closed, so the odor from ignition remains. The combustion gas passes through the convection blower 7 and is discharged to the rear.

Then, when the timer section 21a times up, the combustion control section 21 sends an "open" command to the IIR vane control section 25 to start the convection blower 7, and opens the air outlet to blow hot air forward. Then, the combustion control section 21 sets the combustion amount based on the signals from the temperature detection section 23 and the room temperature setting section 24, and based on the settings, sends signals to the burner 3, convection blower 7, and variable blade side t'lJ section 25, respectively. Change the feed, combustion amount, and airflow amount. At this time, the angle of the variable blades 9 is also changed, so for example, during weak combustion, the variable blades 9 are tilted significantly downward and the hot air is blown considerably downward, making it possible to supply warm air to a long distance, providing comfortable heating. becomes possible.

Next, when the operation switch 22 is turned off, the combustion control section 2
1 starts the timer section 21a, stops the burner 3 and the convection blower 7, and starts the variable blade control section 25.
Sends a “close” command to close the air outlet. therefore,
Combustion gas with an odor during extinguishing the fire passes through the convection blower 7 and is discharged to the rear.

Then, the combustion control section 21 restarts the convection blower 7 when the time of the dymer part 21a has expired, sends an "open" command to the variable vane control section 25, and opens the air outlet to cool the burner 3, etc. Blow out residual heat forward.

In this manner, by stopping the convection blower at the time of ignition and extinguishing the fire, and further closing the outlet with the variable blade, ignition and extinguishing odors are not discharged from the outlet, thereby reducing odor.

In addition, in this embodiment, the timer section at the time of ignition was started after receiving the operation ready signal of the burner 3, but it is sufficient that the time-up occurs after the ignition, for example, it may be after the ignition is detected or when the operation switch is turned on. In addition, when extinguishing a fire, the burner 3 was immediately stopped at the same time as the operation switch was turned off, but if the air outlet is not immediately blocked due to the mechanism, or if the convection blower is not stopped immediately, the time will be shorter than the timer setting. It may be delayed by time. Furthermore, when combustion stopped, the operation switch was turned OFF.
Stopping may also be due to other conditions.

Effects of the Invention As described above, in the first combustion control device of the present invention, at the time of ignition, the convection blower is stopped for a certain period of time, and the outlet is further blocked, so that the ignition odor is not discharged from the outlet, reducing odor. can. Further, in the second combustion control device of the present invention, when extinguishing a fire, the convection blower is stopped for a certain period of time and the outlet is further closed, so that the extinguishing odor is not discharged from the outlet and the odor can be reduced.

Furthermore, in the third combustion control device of the present invention, ignition or extinguishing odor is not discharged from the outlet, reducing odor, and the temperature distribution in the room can be adjusted by rotating the variable blade according to the amount of combustion or hot air. This allows for more uniform heating and more comfortable heating.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hot air heater showing an embodiment of the present invention;
Fig. 2 is an enlarged perspective view of the main parts, Fig. 3 is a block diagram of a control circuit showing an embodiment of the present invention, Fig. 4 is a flowchart of the same, and Fig. 5 is a cross section showing a conventional hot air heater. It is a diagram. 1...Hot air heater body, 2...Hot air outlet, 3...Burner, 7...Convection blower, 9... ...Air outlet closing device (variable blade), 21... Combustion control section, 2ia...
Timer section, 25... Variable jI drive control section. Name of agent: Patent attorney Shigetaka Awano・・・ 2-・・ 3-・- 7... 9-・・ Book Salary Temperature I! L air outlet a Diversion air outlet with burner 9 nitrogen w (1 table placed inside the can outlet opening) Fig.

Claims (3)

[Claims] (1) A main body having a hot air outlet, a burner installed in the main body for burning vaporized fuel, and a convection system for blowing the heat generated by combustion of the burner to the outside of the device main body as hot air. a blower for convection, an outlet closing device disposed at the warm air outlet, a timer unit that counts a predetermined time from an arbitrarily determined time point between the start of operation and the start of combustion, and a blower for convection at the start of combustion. The blower is stopped and the outlet closing device is operated to close the outlet, and after a predetermined period of time based on the output from the timer section, the convection blower is operated and the outlet closing device is released to open the outlet. A combustion control device that has a combustion control section that allows (2) A main body having a hot air outlet, a burner installed in the main body for burning vaporized fuel, and a convection system for blowing the heat generated by combustion of the burner to the outside of the device main body as hot air. the convection blower, and an outlet closing device disposed at the hot air outlet, a timer section for counting a predetermined time from the time of stoppage of operation, and a timer section for stopping the convection blower and closing the outlet closing device when the operation is stopped. Combustion control comprising a combustion control unit that operates to close the air outlet and, after a predetermined period of time based on the output of the timer unit, restarts the convection blower and releases the air outlet closing device to open the air outlet again. Device. (3) The outlet closing device is composed of variable wind direction blades that are pivotally supported so as to be able to swing up and down, and a variable blade control unit that moves the variable wind direction blades up and down depending on the amount of combustion or the amount of air blown from the convection blower. The combustion control device according to claim (1) or (2).