Combustion controlling device

Patent metadata

Field	Value
Publication number	US-10260747-B2
Application number	US-201715470307-A
Country	US
Kind code	B2
Filing date	Mar 27, 2017
Priority date	Mar 28, 2016
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A first reset switch is attached to a combustion controlling device. A second reset switch is installed at a remote place distant from the combustion controlling device. A first reset input from the first reset switch is received without any restriction to release the lockout. A reset input from the second reset switch is received with any restriction to release the lockout. Specifically, when the lockout releases are performed for a predetermined number of times or more upon receiving the reset input before a predetermined time elapses after the lockout has been released upon receiving the initial reset input, the release of the lockout upon receiving the reset input is prohibited until the predetermined time elapses.

First claim

What is claimed is:

1. A combustion controlling device for controlling an operation of a combustion device, comprising:
processing circuitry configured to monitor and detect an abnormality of the combustion device and output a control signal to the combustion device to stop the operation of the combustion device when the abnormality is detected and put the combustion controlling device into a lockout state; and
a first reset switch attached to the combustion controlling device to manually issue a first reset input instructing restart of the operation of the combustion device,
wherein the processing circuitry is further configured to
receive, from a second reset switch connected to the combustion controlling device by a wire and provided at a remote place distant from the combustion controlling device, a second reset input instructing the restart of the operation of the combustion device;
receive the first reset input instructing the restart of the combustion device from the first reset switch without any restriction, and in response, release the lockout state of the combustion controlling device; and
receive the second reset input instructing the restart of the combustion device from the second reset switch with a restriction, only releasing the lockout state of the combustion controlling device under predetermined conditions,

wherein the processing circuitry is configured to release the lockout state of the combustion controlling device in response to receiving a particular second reset input, only when both a number of times of receiving the second reset input is less than a predetermined number of times and the particular second reset input is received before a predetermined time elapses starting from a time of receiving an initial second reset input, the number of times being counted starting from the time of receiving the initial second reset input, and otherwise prohibit the release of the lockout state in response to receiving the particular second reset input.

2. The combustion controlling device according to claim 1 , wherein the processing circuitry is further configured to inform an operator that the release of the lockout state by the second reset switch cannot be performed, during a time when the release of the lockout state of the combustion controlling device, in response to receiving the second reset input, is prohibited.

3. The combustion controlling device of claim 1 , wherein the processing circuitry is further configured to prohibit the release of the lockout state when the number of times of receiving the second reset input is equal to or greater than the predetermined number of times.

Assignees

• Azbil Corp

Inventors

• Suzuki Kayo
• Nishiyama Takeshi
• Ishii Shigeki

Classifications

• F23N2223/22

  Timing network · CPC title

• F23N2223/38

  Remote control · CPC title

• F23N2227/16

  Checking components, e.g. electronic · CPC title

• F23N5/20 Primary

  with a time program acting through electrical means, e.g. using time-delay relays · CPC title

• F23N5/24

  Preventing development of abnormal or undesired conditions, i.e. safety arrangements (F23N5/02 - F23N5/18 take precedence) · CPC title