JP2015129613A - combustion control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform adjustment of high-combustion position and low-combustion position of a damper as well as confirmation of damper operation that is required when a proportional controller performs controlling readily and quickly without additional wiring.SOLUTION: A combustion control device 11 includes: a first adjustment mode operating part 112 for turning a first relay contact 104 off and switching a second relay contact 105 to adjust a position of the damper 12, so that the high-combustion position and low-combustion position are set; and a second adjustment mode operating part 113 for turning the first relay contact 104 on and inputting a pseudo-parameter to the proportional controller 103, so that operation confirmation on the damper 12 is performed.

Description

  The present invention relates to a combustion control device that controls combustion in a combustion chamber.

  2. Description of the Related Art A combustion control device that controls combustion in a combustion chamber installed in a factory or building as disclosed in Patent Document 1 is capable of switching between high combustion operation and low combustion operation. The high combustion operation and the low combustion operation are performed by changing the damper that adjusts the amount of air supplied to the main burner to the high combustion position or the low combustion position.

  Conventionally, as shown in FIG. 3, a power source 101, a power transformer 102, a proportional regulator 103, and first and second relay contacts 104 and 105 are connected to a damper motor 10 that controls the position of the damper. Here, the proportional regulator 103 performs proportional control of the damper motor 10 based on a parameter (for example, temperature) relating to combustion. Further, the first relay contact 104 switches ON / OFF of control by the proportional regulator 103. The second relay contact 105 switches the operation of the damper motor 10 so as to set the damper to the high combustion position or the low combustion position when the first relay contact 104 is in the OFF state. The first and second relay contacts 104 and 105 are controlled by a combustion controller (not shown).

  When the pre-purge is performed by the combustion control device, the first relay contact 104 is switched to the OFF side (terminal 11 side), the second relay contact 105 is switched to the Hi side (terminal 10 side), and the damper is turned on. Move to high combustion position. Thereby, pre-purge can be performed by flowing air at the maximum flow rate. Then, after performing a pre-purge for a predetermined time, the second relay contact 105 is switched to the Lo side (terminal 11 side) to move the damper to the low combustion position. Then, the first relay contact 104 is switched to the ON side (terminal 9 side), and control by the proportional regulator 103 is performed.

  On the other hand, in the low combustion operation, if the supply amount of air to the main burner is too large or the supply amount of gas is too small, the flame cannot be held and a fire is lost. Also, if the amount of air supply is too small, the air flow switch that detects the air flow may not be turned on. Therefore, it is necessary to adjust the low combustion position of the damper. It is also necessary to check the operation of the damper accompanying the adjustment of the high combustion position of the damper and the control by the proportional regulator 103.

  Here, the position adjustment and the operation confirmation are performed while the combustion control device stops the combustion. On the other hand, in the conventional configuration, the first and second relay contacts 104 and 105 cannot be moved while the combustion is stopped. Therefore, it is necessary to perform manually using a jumper wire.

  That is, in FIG. 3, when adjusting the high combustion position and the low combustion position of the damper, first, the jumpers are used to first short-circuit the terminals 8 and 9 and then short-circuit the terminals 9 and 10. 2 relay contact 105 is switched to the Hi side. In this state, the damper is manually moved to set a high combustion position. Next, the terminals 9 and 11 are short-circuited using a jumper wire so that the second relay contact 105 is switched to the Lo side. In this state, the damper is manually moved to set the low combustion position.

  In addition, in FIG. 3, when the operation of the damper accompanying the control by the proportional regulator 103 is to be checked, the first relay contact 104 is switched to the ON side by short-circuiting the terminals 8 and 9 using a jumper wire. To. In this state, a pseudo parameter (pseudo signal) is input to the proportional controller 103 to check whether the damper performs an operation corresponding to the pseudo parameter.

JP 05-126475 A

  As described above, in the conventional combustion control apparatus, when adjusting the high combustion position and low combustion position of the damper and checking the operation of the damper accompanying the control by the proportional regulator 103, the jumper wire is used. . Therefore, there is a problem that the work is complicated.

  The present invention has been made to solve the above-described problems, and easily and quickly adjusts a high combustion position and a low combustion position of a damper and performs control by a proportional regulator without performing additional wiring. An object of the present invention is to provide a combustion control device capable of confirming the operation of a damper.

  The combustion control device according to the present invention includes a damper that adjusts the amount of air supplied to the burner by changing the position, a damper motor that drives the damper, and a proportional regulator that proportionally controls the damper motor based on parameters related to combustion. A first relay contact for switching ON / OFF of the control by the proportional regulator, and a first operation for switching the operation of the damper motor so as to set the damper to a high combustion position or a low combustion position when the first relay contact is OFF. And a combustion controller that switches between the first and second relay contacts. The combustion controller sets the first relay contact to the OFF state and sets the second relay contact. And adjust the damper position to turn on the first adjustment mode operation unit for setting the high combustion position and the low combustion position and the first relay contact. , By inputting the pseudo parameter proportional controller, in which a second adjustment mode operation unit which performs operation confirmation of the damper.

  According to the present invention, since it is configured as described above, it is possible to easily and quickly adjust the high combustion position and low combustion position of the damper and confirm the operation of the damper accompanying the control by the proportional regulator without performing additional wiring. It can be carried out.

It is a figure which shows the whole structure of the combustion control apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the combustion controller in Embodiment 1 of this invention. It is a figure which shows the structure of a damper motor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
1 is a diagram showing an overall configuration of a combustion control apparatus according to Embodiment 1 of the present invention.
As shown in FIG. 1, the combustion control device detects a main burner 2 and a pilot burner 3 incorporated in the combustion chamber 1, an ignition transformer 4 for igniting the pilot burner 3, and the presence or absence of a burner flame in the combustion chamber 1. A possible flame detector 5, an air supply system 7 for supplying air to the main burner 2 by a blower 6, and first and second fuel supply systems 8 for supplying fuel such as gas to the main burner 2 and the pilot burner 3, 9, a damper motor 10 that drives a damper 12 described later provided in the air supply system 7, and a combustion that controls valves 13 to 16 and damper motor 10 described later provided in the first and second fuel supply systems 8 and 9. And a controller 11. The combustion controller 11 also has a function of individually controlling the first and second relay contacts 104 and 105 (see FIG. 3) connected to the damper motor 10.

In addition, a damper 12 that controls the fluid flow rate in a single pipe is connected to the air supply system 7 that supplies air to the main burner 2 by changing the position.
The first fuel supply system 8 for supplying fuel to the main burner 2 controls the flow rate of fluid in a single pipe, and the fluid in the pipe is transferred to the main burner 2 side while the combustion control device stops combustion. Valves 13 and 14 that prevent leakage are connected in series.
Similarly, in the second fuel supply system 9 for supplying fuel to the pilot burner 3, the flow rate of fluid in a single pipe is controlled, and the fluid in the pipe is transferred to the pilot burner 3 during combustion stop of the combustion control device. Valves 15 and 16 that prevent leakage to the side are connected in series.
As a matter of course, the first and second fuel supply systems 8 and 9 flow the fuel to the downstream side by setting the upstream side to a higher pressure.

The damper motor 10 is connected to a power source 101, a power transformer 102, a proportional regulator 103, and first and second relay contacts 104 and 105 as shown in FIG.
Here, the proportional regulator 103 performs proportional control of the damper motor 10 based on a parameter (for example, temperature) relating to combustion. Further, the first relay contact 104 switches ON / OFF of control by the proportional regulator 103. The second relay contact 105 switches the operation of the damper motor 10 so that the damper 12 is set to the high combustion position or the low combustion position when the first relay contact 104 is in the OFF state. The first and second relay contacts 104 and 105 are controlled by the combustion controller 11.

Next, the configuration of the combustion controller 11 will be described with reference to FIG.
As shown in FIG. 2, the combustion controller 11 includes a normal mode operation unit 111, a first adjustment mode operation unit 112, a second adjustment mode operation unit 113, and a mode transition unit 114.

  The normal mode operation unit 111 operates in a normal mode in which normal combustion control is performed by controlling the valves 13 to 16 and the damper motor 10 provided in the first and second fuel supply systems 8 and 9. The operation in the normal mode is the same as the conventional combustion control, and the detailed description thereof is omitted.

The first adjustment mode operation unit 112 adjusts the position of the damper 12 by switching the second relay contact 105 by turning the first relay contact 104 OFF while the combustion control device is being started and stopped. It operates in a first adjustment mode (trial operation mode) that sets a high combustion position and a low combustion position.
The second adjustment mode operation unit 113 turns on the first relay contact 104 and inputs a pseudo parameter (pseudo signal) to the proportional regulator 103 while the combustion control device is being started and stopped. The operation is performed in the second adjustment mode (trial operation mode) in which the operation confirmation is performed.

  The mode transition unit 114 performs mode switching by operating any one of the normal mode operation unit 111, the first adjustment mode operation unit 112, or the second adjustment mode operation unit 113 in response to a request from the outside. Is what you do. Note that the mode transition unit 114 can transition to the first and second adjustment modes only when the combustion control device is in the start-stop state.

  Next, operations in the first and second adjustment modes by the combustion control apparatus configured as described above will be described. First, the operation in the first adjustment mode (adjustment of the high combustion position and the low combustion position of the damper 12) will be described. Note that the first relay contact 104 is switched to the OFF side (terminal 11 side in FIG. 3) during the start-stop.

  When the combustion controller is activated and stopped, when an operator operates the combustion controller 11 to request a transition to the first mode, the mode transition unit 114 operates the first adjustment mode operation unit 112. Mode switching is performed. Then, first adjustment mode operation unit 112 first switches second relay contact 105 to the Hi side (terminal 10 side in FIG. 3). In this state, the damper 12 is manually moved to set a high combustion position. Next, the second relay contact 105 is switched to the Lo side (terminal 11 side in FIG. 3). In this state, the damper 12 is manually moved to set a low combustion position. Thereby, the high combustion position and low combustion position of the damper 12 can be adjusted without using a jumper wire as in the prior art.

Next, the operation in the second adjustment mode (operation confirmation of the damper 12 accompanying the control by the proportional regulator 103) will be described.
If the operator operates the combustion controller 11 and requests a transition to the second mode while the combustion control device is being started and stopped, the mode transition unit 114 operates the second adjustment mode operation unit 113. Mode switching is performed. Then, the second adjustment mode operation unit 113 switches the first relay contact 104 to the ON side (terminal 9 side in FIG. 3). In this state, a pseudo parameter (pseudo signal) is input to the proportional controller 103 to check whether the damper 12 performs an operation according to the pseudo parameter. Thereby, it can be confirmed whether the damper 12 is operating normally according to the control by the proportional regulator 103.

  As described above, according to the first embodiment, the combustion controller 11 has the first and second adjustments for individually operating the first and second relay contacts 104 and 105 while the combustion control device is being started and stopped. Since the mode is added, the high combustion position and the low combustion position of the damper 12 can be adjusted easily and quickly without performing additional wiring, and the operation of the damper 12 accompanying the control by the proportional regulator 103 is confirmed. be able to. Further, since the first and second adjustment modes can be changed only when the combustion control device is in the start-stop state, misuse can be prevented.

  In the present invention, any constituent element of the embodiment can be modified or any constituent element of the embodiment can be omitted within the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Main burner 3 Pilot burner 4 Ignition transformer 5 Flame detector 6 Blower 7 Air supply system 8, 9 First and second fuel supply systems 10 Damper motor 11 Combustion controller 12 Dampers 13-16 Valve 101 Power supply 102 Power supply transformer 103 Proportional controller 104, 105 First and second relay contacts 111 Normal mode operation unit 112, 113 First and second adjustment mode operation unit 114 Mode transition unit

Claims (1)

A damper that adjusts the amount of air supplied to the burner by changing the position,
A damper motor for driving the damper;
A proportional regulator for proportionally controlling the damper motor based on parameters relating to combustion;
A first relay contact for switching ON / OFF of control by the proportional controller;
A second relay contact for switching the operation of the damper motor so as to set the damper to a high combustion position or a low combustion position when the first relay contact is in an OFF state;
A combustion control device comprising a combustion controller for switching the first and second relay contacts,
The combustion controller
A first adjustment mode operation unit that sets the high combustion position and the low combustion position by adjusting the position of the damper by switching the second relay contact and turning the first relay contact OFF When,
Combustion control, comprising: a second adjustment mode operation unit configured to confirm operation of the damper by turning on the first relay contact and inputting a pseudo parameter to the proportional regulator. apparatus.

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