JPH0658531A - Control device for burner - Google Patents

Abstract

PURPOSE:To make serviceable the period capable of braking for a convection fan during a specific operation. CONSTITUTION:This control device provides a combustion section, a convection fan 19 which blasts high temperature gas as a hot temperature air from the combustion section outside an equipment main body, a combustion control section 22 which performs operations, such as combustion starting, combustion volume control and combustion shutdown and a convection fan braking section 24 which brakes the convection fan 19. This device forces the convection fan braking section 24 to operate by carrying out a specific operation based on an operation command section 25 during the drive of the convection fan 19. This construction makes it possible to reduce inspection time during quality inspection time in a manufacturing process and hence reduce cost, and what is more, to obtain odor reduction effect during extinguishment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a combustor such as an indoor open type oil hot air heater.

[0002]

2. Description of the Related Art A conventional combustor of this type is shown in FIG. In FIG. 4, 1 is an oil tank, 2 is a sub tank for storing kerosene supplied from the oil tank 1, 3 is an oil supply pipe, 4 is an oil level gauge, and 5 is an electromagnetic for pumping kerosene to the oil level gauge 4. A pump, 6 is a blower for combustion, 7 is a duct that guides the blown air from the blower 6 for combustion to the primary air supply port 8, 9 is a pressure pipe that branches from the duct 7 and guides part of the blown air to the constant oil leveler 4, Reference numeral 10 is a pressurizing solenoid for controlling the blowing of air to the pressurizing pipe 9, 11 is a pipe orifice for supplying kerosene to the carburetor 12 when the oil level of the constant oil leveler 4 is pressurized, and 13 is a carburetor. Heater 12 heats, 14 an ignition heater for igniting the vaporized gas vaporized by the vaporizer 12, 16 a burner head as a combustion section, 17 a combustion state by detecting an ion current flowing in the flame Flame rod, 18 burning 19 is a convection blower for blowing outside the device body of the high-temperature gas as warm air.

FIG. 5 is a block diagram of a control unit including a control unit for controlling the above-mentioned device, in which 20 is a room temperature setting unit and 2 is a room temperature setting unit.
Reference numeral 1 denotes a room temperature detection unit, 22 denotes a combustion control unit that controls the combustion amount based on the outputs from the room temperature setting unit 20 and the room temperature detection unit 21, and controls combustion stop / start. A control signal is sent to the air blower 6 and the convection air blower 19.

Reference numeral 23 is a timer unit which is activated when a combustion stop signal is received from the combustion control unit 22 and sends an output to the convection blower braking unit 24 until a predetermined time elapses. Further, the convection blower braking unit 24 brakes and stops the convection blower 19 while receiving the output from the timer unit 23. Reference numeral 25 is an operation command unit that gives the combustion control unit 22 signals for starting and stopping the operation.

Next, the operation of the control device having the above structure will be described with reference to the flowchart of FIG. First, when the operation command is confirmed in step 26, the combustion control unit 22 starts combustion according to a predetermined program.
Next, when the combustion is confirmed in step 27, the combustion control unit 22 sets the combustion amount based on the outputs from the room temperature setting unit 20 and the room temperature detection unit 21, and the signals are used for the fuel pump 5, the combustion blower 6 and the convection. It sends to the blower 19 and controls these. Then, in step 28, the presence or absence of the combustion stop signal is checked. This combustion stop signal is sent to the operation command unit 2
The combustion control unit 22 issues the signal not only based on the stop command from the control unit 5 but also when the room temperature from the room temperature detection unit 21 is higher than the room temperature set by the room temperature setting unit 20.

Next, when the combustion stop signal is confirmed in step 28, the combustion control section 22 stops the fuel pump 5 and at the same time stops the energization of the combustion blower 6 and starts the timer section 23. To do. Then, in step 29, it is determined whether or not the timer unit 23 times out, and the convection blower 19 is braked for 5 seconds, for example, until the time is up.

In step 29, the timer unit 23
When it is confirmed that the time is up, the timer unit 23 is initialized, the convection blower 19 is rotated for a predetermined time, and the process proceeds to the next step. Generally, this type of oil heater has a problem that an odor is generated at the time of extinguishing a fire. Therefore, there is known an odor countermeasure for making a convection blower 19 vulnerable as disclosed in JP-A-4-39518. Has been.

[0008]

SUMMARY OF THE INVENTION In the above conventional configuration,
Combustion always starts when the convection blower 19 is braked, and the brake signal is output only after it is determined that combustion has stopped. For this reason, when inspecting the degree of braking of the convection blower in the manufacturing process, it is necessary to perform an operation to stop combustion, which requires a long inspection time and leads to an increase in cost.

The present invention has been made in order to solve the above problems, and an object thereof is to make the convection blower capable of braking during a specific operation.

[0010]

SUMMARY OF THE INVENTION A control device for a combustor according to the present invention comprises a combustion section, a convection blower for blowing hot gas from the combustion section as hot air to the outside of the main body of the apparatus, and combustion in the combustion section. A combustion control unit that performs operations such as combustion start, combustion amount control, and combustion stop of the machine, an operation command unit that gives an operation / stop command to this combustion control unit, and a convection blower related to the combustion stop operation. A convection blower braking section for applying a brake is provided, and the convection blower braking section is operated by performing a specific operation from the operation command section while the convection blower is being driven.

A second means of the present invention is a combustor, a fuel pump for supplying fuel to the combustor, a blower for combustion for supplying combustion air to the combustor, and combustion in the combustor. A combustion control unit that controls the start of operation, control of combustion amount, stop of operation, etc.
An operation command unit that gives a stop command and a blower braking unit that brakes the combustion blower and the convection blower in relation to the combustion stop operation are provided, and the blower braking is performed by performing a specific operation from the operation command unit. This is to operate the section.

[0012]

Since the control device for the combustor according to the present invention is configured as described above, the time from the start of operation to the stop of combustion can be set even in the case of confirming the break operation during the manufacturing process. You don't have to wait.

[0013]

【Example】

Example 1. 1 is a block diagram showing an embodiment of a control device for a combustor according to the present invention. Since the basic configuration of the control device for the combustor is the same as that of the conventional example shown in FIGS. 3 and 4, the same reference numerals are given and description thereof is omitted, and only different portions will be described. In FIG. 1, reference numeral 32 denotes a convection blower braking determination unit that determines whether or not the convection blower 19 is braked when the operation command unit 25 inputs an inspection operation. FIG. 2 is a flowchart showing the operation.

In step 30 of FIG. 2, after the operation command is issued in step 26, it is determined whether the normal combustion or the inspection operation is performed. Here, if the combustion control unit 22 does not receive the command signal from the operation command unit 25 as the inspection operation signal, the operation proceeds to the combustion start of the next stroke. Otherwise,
If there is an inspection operation signal in the command signal, the combustion control unit 22 outputs a signal for driving or stopping the combustion pump 5, the combustion blower 6, and the convection blower 19 as an inspection operation. During the inspection operation process, if the combustion control unit 22 receives a signal for performing a specific operation from the operation command unit 25 to perform the convection blower braking, the process proceeds to step 31, and the convection blower braking determination unit 32 determines. Then, the convection blower is braked (brake operation).

This braking signal is output to the convection blower 19 through the combustion control unit 22 while being an operation command to the operation command unit 25, for example. Further, for the convection blower braking during the normal combustion, the combustion control unit 22 operates the operation command unit 2
Until the combustion stop signal is input from 5, the timer unit 23 is not activated and the convection blower braking is not performed as in the conventional example. Here, the specific operation refers to an operation of pressing the convection blower braking switch to the operation command unit 25, for example, if there is a convection blower braking switch during the inspection operation process that is not the normal combustion operation. .

Example 2. In the above embodiment, the braking operation of the convection blower 19 has been described, but the braking operation of the combustion blower 6 has the same odor reducing effect as in the conventional example. Next, FIG. 3 will be described. FIG. 3 is a flow chart showing another embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. In FIG.
When a specific operation is performed during the processing of the inspection operation and it is determined in step 31 that the convection blower 19 and the combustion blower 6 are braked, the convection blower 19 is braked and the combustion blower 6 is simultaneously braked. It is configured in this way. By doing so, the generation of odor can be significantly reduced.

[0017]

As described above, according to the present invention, the convection blower can be braked by a specific operation from the operation command section regardless of whether combustion is stopped. There is an effect that the cost can be shortened and the cost can be reduced. Further, when the combustion is stopped, the brake for the convection blower of the conventional example and the brake of the combustion blower are used together, so that the odor can be further prevented.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device for a combustor showing an embodiment of the present invention.

FIG. 2 is a flowchart of a control device for a combustor showing an embodiment of the present invention.

FIG. 3 is a flowchart of a control device for a combustor showing another embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional oil warm air heater.

FIG. 5 is a block diagram of a conventional control device for a combustor.

FIG. 6 is a flowchart of a conventional control device for a combustor.

[Explanation of symbols]

 5 Fuel Pump 6 Combustion Blower 19 Convection Blower 22 Combustion Control Section 23 Timer Section 24 Convection Blower Braking Section 25 Operation Command Section 32 Convection Blower Braking Discrimination Section

Claims (2)

[Claims] 1. A combustion unit, a convection blower that blows high-temperature gas from the combustion unit as hot air to the outside of the device main body, and operations such as combustion start, combustion amount control, and combustion stop of the combustor in the combustion unit. A combustion control unit that performs the operation, an operation command unit that gives an operation / stop command to the combustion control unit, and a convection blower braking unit that brakes the convection blower in association with the combustion stop operation are provided. A control device for a combustor, wherein the convection blower braking unit is operated by performing a specific operation from an operation command unit during driving. 2. A combustor, a fuel pump for supplying fuel to the combustor, a blower for combustion for supplying combustion air to the combustor, a start of operation of the combustor in the combustor, and a control of combustion amount.・ Combustion control unit that controls operations such as operation stop, operation command unit that gives operation / stop commands to this combustion control unit, and blower that brakes combustion blower and convection blower in relation to combustion stop operation A control device for a combustor, comprising: a braking unit, wherein the blower braking unit is operated by performing a specific operation from an operation command unit.