JP2010151349A - Combustion equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide combustion equipment saving power at a gas detecting part while maintaining safety without uselessly wasting the life of the gas detecting part by setting the time to start the gas detecting part to the appropriate time. <P>SOLUTION: The combustion equipment 100 includes a combustion part for burning fuel gas G; a gas supply port 10 to which a connection joint 11 at one end of a gas pipe 12 for leading the fuel gas G from the outside is connected; a gas pipe connection state detecting means A detecting whether the gas supply port 10 and the connection joint 11 are in the connected state or non-connected state; the gas detecting part; and a power supply outlet which is a supply source of external electric power, and a power supply plug 26 connected thereto. The combustion equipment 100 further includes a gas detecting part starting means C for starting the gas detecting part 20 at the time when the gas pipe connection state detecting means A detects that the gas supply port 10 and the connection joint 11 are in the connected state in an electric power supply state where the power supply plug 26 is connected to the power supply outlet. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  Whether the present invention is in a connected state of a combustion part for burning fuel gas, a gas supply port connected to a connection joint at one end of a gas pipe for guiding the fuel gas from the outside, and the gas supply port and the connection joint The present invention relates to a combustion apparatus including a gas pipe connection state detection unit that detects whether or not a connection is established, a power outlet that is a source of external power, and a power plug that is connected to the power outlet.

Combustion equipment typified by fan heaters, etc. includes fuel gas supplied to the combustion section as fuel, and gas that detects carbon monoxide gas released to the outside when incomplete combustion occurs in the combustion section A device provided with a detection unit is known (see Patent Document 1).
And although not clearly shown, the start timing of the gas detection unit of Patent Document 1 is, for example, the timing when the power plug is connected to the power outlet that is the supply source of the external power and the combustion device is in the power supply state Alternatively, it is time to turn on the operation switch on the operation panel of the combustion equipment.

JP 2001-65989 A

The gas detector disclosed in Patent Document 1 described above consumes a relatively large amount of electric power when activated and has a predetermined life, so that leakage of fuel gas and generation of carbon monoxide gas occur. In situations where the possibility is low, it is desirable to enter a stopped state. However, as described above, when the activation timing of the gas detection unit is a timing when the power supply plug is connected to the power outlet and the combustion device is in the power supply state, the gas detection unit detects that the combustion device is stopped and the gas In spite of the low risk of leakage, there is a problem of starting up and consuming power and wasting its life.
In addition, the gas detection unit requires a certain amount of rise time until it can perform appropriate gas detection after being activated. For this reason, for example, as described above, when the start timing of the gas detection unit is the time when the operation switch is turned on and the combustion device is in the operation state, gas detection can be appropriately performed at the start of operation of the combustion device. There is a possibility that there is no possibility, and there is a problem that the meaning of sufficiently providing the gas detection unit is not achieved.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to achieve the purpose of the gas detection unit by setting the timing of starting the gas detection unit as an appropriate time. The object is to provide a combustion device that achieves electric power and does not waste the life of the gas detector.

  In order to achieve the above object, a combustion apparatus according to the present invention comprises a combustion section for burning fuel gas, a gas supply port connected to a connection joint at one end of a gas pipe for guiding the fuel gas from the outside, and the gas supply port And a gas pipe connection state detection means for detecting whether the connection joint is in a connected state or a non-connected state, a gas detection unit for detecting at least one of combustible gas or carbon monoxide gas, and external power A combustion apparatus comprising a power outlet as a supply source and a power plug connected to the power outlet. The characteristic configuration of the combustion apparatus is that the gas pipe connection state is detected when the power plug is connected to the power outlet. A means is provided with a gas detection section starting means for starting the gas detection section when it is detected that the gas supply port and the connection joint are in the connected state.

According to the above characteristic configuration, in the power supply state, the gas detection unit is activated when it is detected that the connection joint and the gas supply port are in the connected state. As a result, since the gas detection unit can maintain the stop state from the time when the power supply state is reached until the time when the connection state is detected, the gas detection unit is prevented from consuming unnecessary power in the gas detection unit. It is possible to suppress unnecessarily wasting the lifespan.
On the other hand, since the gas detection unit is activated at the time when the connection state between the connection joint and the gas supply port is detected, the gas detection unit is activated at a time earlier than the time when the ignition operation of the combustion device starts. Thereby, by the time of ignition of a combustion apparatus, it can avoid making the gas detection part a gas detection state reliably, and the time when the combustion apparatus cannot perform gas detection during ignition can be avoided.
From the above, the timing to start the gas detection unit is set to a unique time that is not conventional, and while maintaining safety, the gas detection unit saves power and wastes the life of the gas detection unit It is possible to realize a combustion device that never happens.

  In a further characteristic configuration of the combustion apparatus according to the present invention, the gas detection unit activation means changes from the power non-supply state to the power supply state in a power non-supply state where the power plug is not connected to the power outlet. When the transition is made, the gas pipe connection state detection means detects whether the connection state or the non-connection state, and when the connection state is detected, the gas detection unit is activated. .

  According to the above characteristic configuration, for example, even when the power plug is not connected to the power outlet and the power is not supplied to the combustion device, the power supply state is shifted from the power non-supply state. The gas detection unit detects the connection state with the gas pipe connection state detection means and starts the gas detection unit quickly without waiting for the operation switch to be turned on. It can lead to a detectable state. Thereby, when a combustion apparatus tries to transfer to a driving | running state after that, the gas detection part which is in a gas detection possible state can detect a gas leak favorably.

  A further characteristic configuration of the combustion device according to the present invention is provided with combustion start means for starting combustion in the combustion section, and the combustion start means is configured such that the gas detection section start means starts the gas detection section. In addition, combustion is started when a combustion start command for the combustion section is received.

  According to the above characteristic configuration, when the combustion start means receives the combustion start command and starts combustion in the combustion section, the gas detection section can be reliably activated. As a result, when the combustion section is in a combustion state, the gas detection section can be reliably maintained in a gas detection enabled state, and carbon monoxide generated when the leaked fuel gas or the combustion section is incompletely combusted. Gas can be detected reliably.

  A further characteristic configuration of the combustion device according to the present invention includes combustion prohibiting means capable of prohibiting combustion in the combustion section, and the combustion prohibiting means, when the gas detection section detects leakage of the fuel gas, Until the gas pipe connection state detecting means detects the change from the connected state to the non-connected state until it is detected again as the connected state, combustion in the combustion section is prohibited.

Even when the gas pipe connection state detecting means determines that the gas supply port and the connection joint are in a connected state, a foreign object or the like is caught in the connection part between the gas supply port and the connection joint, May cause gas leakage.
According to the above characteristic configuration, when the gas detection unit detects a gas leak such as a fuel gas as a flammable gas, the connection between the gas supply port and the connection joint is once released and connected again in the combustion unit. Combustion is prohibited, and the combustion equipment is maintained in a stopped state. In other words, during the period when gas leaks are occurring, the user etc. positively reconnects the gas supply port and the connection joint to remove any foreign matter biting into the connection site. Can do. As a result, the cause of the gas leak can be positively solved by the user, so that the safety of the user can be further improved as compared with the case of simply warning the gas leak.

As an embodiment of the present invention, a basic configuration of a gas fan heater 100 which is an example of a combustion device will be described with reference to FIG.
As shown in FIG. 1, the gas fan heater 100 includes a combustion chamber 1 (an example of a combustion unit) that combusts a supplied fuel gas G (such as a city gas 13 </ b> A mainly composed of methane), and outside air through an intake port 7. A fan 6 that takes in from the air and leads to the air outlet 9, a gas sensor 20 (an example of a gas detector) that detects flammable gas (such as a leaked fuel gas G), and an operation unit B that operates the gas fan heater 100. And a control device 18 that controls the operation of the gas fan heater 100 based on a signal from the operation unit B or the like.

  The gas fan heater 100 is provided with a power plug 26 connected to a power outlet for supplying power from the outside, and power is supplied to the control device 18 and the like through the power plug 26.

The combustion chamber 1 is disposed inside a casing 13 that forms the outer wall surface of the fan heater 100, a gas supply pipe 2 that guides the fuel gas G from the outside, and a burner 3 that burns an air-fuel mixture of the fuel gas G and outside air. And an igniter 4 for igniting the burner 3, and a thermocouple 5 for detecting the temperature in the burner 3.
The casing 13 has an intake port 7 on the back surface and a blow-out port 9 on the front surface, and is configured to surround the entire fan heater 100. Inside the casing 13 is a combustion chamber in which a part of the outside air is used as combustion air. 1, and the remaining part is mixed with the combustion gas discharged from the combustion chamber 1 (the gas after the fuel gas G and combustion air are mixed and burned) and sent out from the outlet 9. A flow path 8 is provided. The air inlet 7 is provided with an air filter 17 for removing foreign substances and the like.

  Although the details will be described later, a gas supply port 10 connected to the connection joint 11 of the gas pipe 12 that guides the fuel gas G is provided on the rear surface of the casing 13.

  The fan 6 is disposed in the middle of the outside air flow path 8, sucks outside air from the intake port 7 and distributes a part thereof through the combustion chamber 1, and the remaining part and the combustion exhausted from the combustion chamber 1. It functions to mix the gas and guide it to the outlet 9.

As will be described later, the gas sensor 20 is configured to be activated when electric power is supplied from the outside, and is configured to be activated and stopped based on a control signal from the control device 18. For example, the gas sensor 20 may be a semiconductor type or an infrared absorption type. As shown in FIG. 1, it is easy to detect flammable gas due to convection of outside air such as the inside of the outer surface of the casing 13. Provided at the place.
The gas sensor 20 functions to detect the concentration of the combustible gas present in the atmosphere when the gas sensor 20 is activated and supplied with power from the outside and is in a gas detectable state. And when it determines with the density | concentration of combustible gas being more than a setting value, an abnormality detection signal is transmitted to the control apparatus 18. FIG. When receiving the abnormality detection signal from the gas sensor 20, the control device 18 closes the on-off valve 24 (shown in FIG. 2) provided in the gas supply pipe 2 to stop the combustion of the burner 3, and then the set time is reached. The drive of the fan 6 is continued until the time elapses, and the abnormality detection signal is transmitted to an abnormality notification panel 16 described later.

  The operation unit B transmits an operation start signal and an operation stop signal for starting and stopping the fan heater 100 to the control device 18, can change the target temperature, and transmits a signal related to the target temperature to the control device 18. The temperature setting button 15 is configured to include an abnormality notification panel 16 that receives an abnormality detection signal of the fan heater 100 from the control device 18 and displays information such as “gas leakage abnormality” and “ignition abnormality”.

  When the control device 18 receives an operation start signal from the operation button 14 in a power supply state in which the power plug 26 is connected to a power outlet, except for a special case described below, the control device 18 drives the fan 6 to rotate. The on-off valve 24 (shown in FIG. 2) provided in the gas supply pipe 2 is opened to supply the fuel gas G to the burner 3, and the igniter 4 is ignited to burn the burner 3. On the other hand, when an operation stop signal is received from the operation button 14, the rotational driving of the fan 6 is stopped, the on-off valve 24 (shown in FIG. 2) provided in the gas supply pipe 2 is closed, and the burner for the fuel gas G The supply to 3 is stopped.

  Next, the characteristic structure of the fan heater 100 which is an example of the combustion apparatus of this invention is demonstrated based on drawing. The present invention is characterized in that the start timing of the gas sensor 20 described above is synchronized with the timing when the connection joint 11 provided at one end of the gas pipe 12 that guides the fuel gas G and the gas supply port 10 are connected. . Therefore, in the following, first, the structure of the connection joint 11 and the gas supply port 10 described above will be briefly described, the operation and action at the time of attachment and removal will be described, the connection state by attachment and the non-connection by removal. The gas pipe connection state detection means 21 for detecting the state will be described with reference to FIGS.

FIG. 3 shows a non-connected state where the connection joint 11 is not connected to the gas supply port 10, and shows a closed state where the leakage of the fuel gas G from the tip of the connection joint 11 is prevented.
On the other hand, FIG. 4 shows a connection state in which the connection joint 11 is connected to the gas supply port 10, and a fluid flow path is formed across the gas pipe 12, the connection joint 11, and the gas supply port 10. The fuel gas G can be supplied from the gas pipe 12 side to the fan heater 100 (not shown in FIG. 4) side. In this state, the connection joint 11 is in an open state in which the outflow of the fuel gas G from its tip is allowed.

[Structure of connecting joint 11]
As shown in FIG. 4, the connecting joint 30 is movable along the axial direction into the cylindrical main body 31, the connector 32 that connects the gas pipe 12 to the cylindrical main body 31, and the inside of the cylindrical main body 31. The disposed actuating member 33, the tubular sleeve member 34 movably disposed along the axial direction on the distal end side of the outer peripheral portion of the cylindrical main body 31, and the outer peripheral portion of the cylindrical main body 31. A cover member 35 covering the base end portion, and a plurality of locking balls respectively disposed in a plurality of ball disposing holes formed on the distal end portion of the cylindrical main body 31 at intervals in the circumferential direction. 36 etc. are comprised.

As shown in FIG. 3, the connection joint 11 in the closed state is held in a state where the operating member 33 is positioned on the side opposite to the connector 32 side by an urging means such as a coil spring (not shown). The operating member 33 held in this manner presses the locking ball 36 radially outward to engage the sleeve member 34, and the sleeve member 34 is held in a state of being located on the connection joint proximal end side. The
In the connection joint 11 in the closed state, the inside of the cylindrical main body 31 and the inside of the actuating member 33 are not in communication, and the outflow of the fuel gas G from the tip of the connection joint 11 is stopped.

As shown in FIG. 4, in the connection joint 11 in the open state, the operation member 33 is pushed into the connection joint base end side by a gas supply port 10 which will be described later, and the inside of the cylindrical main body 31 and the inside of the operation member 33. And a fluid flow path is formed across the connector 32, the inside of the cylindrical main body 31, and the inside of the operating member 33, and the fuel gas G flows from the connector 32 and flows into the connection joint 11. Outflow from the tip is allowed.
In the joint member 30 in the open state, the lock ball 36 is fitted into a lock groove 47 of the gas supply port 10 described later, and the state in which the lock ball 36 engages with the sleeve member 34 is released, and the sleeve member 34 is released. Is moved to the distal end side of the connection joint by biasing means such as a coil spring (not shown).

[Structure of gas supply port 10]
As shown in FIGS. 3 and 4, the gas supply port 10 includes a plug main body 41, a small diameter portion 42 having a smaller diameter than the plug main body 41, and a small diameter portion 42. Is also provided with a connecting portion 43 connected to the connecting joint 11 with a small diameter and an internal gas passage 44 penetrating in the axial direction.
The connecting portion 43 includes a first annular portion 45 on the distal end side, a second annular portion 49 on the proximal end side, and a lock groove 47 therebetween.
The connecting portion 43 is configured to be insertable in a state of sliding contact with the inner peripheral surface of the cylindrical body 31 of the connecting joint 11, and the outer diameter of the small diameter portion 42 is smaller than the inner diameter of the sleeve member 34 of the connecting joint 11. In addition, the outer diameter of the plug main body 41 is larger than the inner diameter of the sleeve member 34 of the connection joint 11.

  Although the details will be described later, a mechanical contact switch 46 that is urged from the end surface toward the distal end side in the axial direction is provided on the distal end side in the axial direction of the plug main body 41, and the mechanical contact switch 46 includes an abutting piece 46 a that abuts against the end surface of the sleeve member 34 opposite to the connector 32 on the distal end side of the plug body 41. The contact piece 46a includes a non-connection detection position (position shown in FIG. 3) located on the distal end side of the plug main body 41 in the axial direction, and a connection detection position (position shown in FIG. 4) located on the proximal end side. Are provided to be switchable.

Next, the operation of each of the connection joint 11 and the gas supply port 10 when the connection joint 11 is attached to the gas supply port 10 and when the connection joint 11 is removed from the gas supply port 10 will be described.
[Operation when installing]
When the connection joint 11 is attached to the gas supply port 10, the closed connection joint 11 is connected to the gas supply port 10 in a state where the connection portion 43 of the gas supply port 10 is inserted into the cylindrical main body 31 as shown in FIG. 3. Move towards. Then, as shown in FIG. 4, the locking ball 36 approaches the lock groove 47 of the connection portion 43 and enters the lock groove 47 while the operating member 33 is pushed into the connection joint proximal end side by the connection portion 43 of the gas supply port 10. As a result, the state in which the sleeve member 34 is engaged with the locking ball 36 is released, and the sleeve member 34 projects toward the distal end side of the connection joint, and the connection joint 11 is connected to the gas supply port 10. . When the sleeve member 34 protrudes to the distal end side of the connection joint in this way, the distal end surface of the sleeve member 34 comes into contact with the contact piece 46a of the mechanical contact type switch 46, and the contact piece 46a is pushed in. The connection joint 11 and the gas supply port 10 shift to the connected state shown in FIG.
[Operation when removing]
When the connection joint 11 is removed from the gas supply port 10, the sleeve member 34 of the connection joint 11 attached to the gas supply port 10 resists the biasing force of a biasing means such as a coil spring (not shown) as shown in FIG. 4. Then move it to the base end of the connection joint. Then, the locking ball 36 is allowed to move outward in the radial direction, whereby the connecting joint 11 can be pulled out from the connecting portion 43 of the gas supply port 10, and the connecting joint 11 is supplied with gas. It can be removed from the mouth 10. Further, the contact piece 46a of the mechanical contact type switch 46 is released from being pressed by the sleeve member 34, and the contact piece 46a protrudes. By the operation | movement which concerns on a series of removal mentioned above, the connection coupling 11 and the gas supply port 10 transfer to the non-connecting state shown in FIG.

  The mechanical contact type switch 46 detects that the contact piece 46a is in contact with the end face of the sleeve member 34 on the non-connector side and is pushed into the base end side of the gas supply port 10, and detects the contact state. The state where 46a is pressed by the distal end surface of the sleeve member 34 is released and protrudes to detect that it is in a disconnected state, thereby functioning as the gas pipe connection state detecting means A. When the mechanical contact type switch 46 detects a connected state or a disconnected state in the power supply state, the mechanical contact type switch 46 transmits a connected state signal or a disconnected state signal to the control device 18.

As soon as the control device 18 receives the connection state signal in the power supply state, the control device 18 transmits an operation start signal to the gas sensor 20 to immediately start the gas sensor 20 and shift to a gas detectable state. Functions as C.
As a result, the gas sensor 20 is started after the time when the power supply state is set, and the gas sensor 20 is operated in a form that does not waste power without consuming power wastefully. In addition, since it is started at least before the time when the fan heater 100 is in the operating state, that is, before the time when the burner 3 is in the combustion state, the burner 3 is reliably maintained in a gas detectable state when in the combustion state. It will operate in a form that secures.
For example, the control device 18 may receive the connection state signal from the mechanical contact switch 46 and transmit the operation start signal to the gas sensor 20 when the preset time has elapsed. Here, the preset time is, for example, a time shorter than the time from when the user or the like connects the connection joint 11 to the gas supply port 10 until the operation switch 14 of the fan heater 100 is pressed. be able to. This time can be derived by, for example, measuring in advance through experiments or the like and averaging them.

In addition, when the gas sensor 20 is activated and a combustion start signal is received from the operation switch 14, the control device 18 opens the on-off valve 24 to guide the fuel gas G to the burner 3 and igniter. The fuel gas G is ignited by 4 and functions as combustion starting means E for starting combustion.
Thereby, the combustion start means E exhibits the function which maintains the state which started the gas sensor 20 reliably, when a combustion start signal is received and combustion is started.

  Further, the control device 18 functions well as the gas detection unit activation means C even in a state where the power is not supplied and the connection joint 11 is connected to the gas supply port 10. That is, the control device 18 shifts from the non-power supply state to the power supply state, becomes a state in which the mechanical contact sensor 46 can be detected by the power supply, and the gas supply port 10 and the connection joint 11 are connected. It is functioning to start the gas sensor 20 and shift to the gas detection state as soon as it is detected whether it is in the connected state or not. Thereby, even immediately after shifting from the power non-supply state to the power supply normal state, the gas sensor 20 can be quickly shifted to the power supply state to ensure the safety of the user.

When the gas sensor 20 detects the leakage of the fuel gas G or the like, the control device 18 receives the connection state signal from the mechanical contact switch 46 and then receives the connection state signal, and the connection state is disconnected. After detecting the change to the state, the period until the connection state detection signal is received again is set as the operation prohibition period, and during the operation prohibition period, the on-off valve 24 (shown in FIG. 2) is maintained in the closed state, The burner 3 functions as combustion prohibiting means D so as not to shift to the combustion state.
For example, if the operation panel 16 displays “Gas leakage abnormality, please remove the gas pipe from the fan heater” or the like during the operation prohibition period, the gas that is one factor of the gas leakage is displayed to the user. It is also possible to expect an effect of removing foreign matters between the supply port 10 and the connection joint 11 and further improving the safety of the user.

  Next, based on FIG.5 and FIG.6, the action | operation of the fan heater 100 which is an example of the combustion apparatus of this invention is demonstrated. 5 and 6 show an operation flow of the fan heater 100 on the assumption that the fan heater 100 is in a power supply state.

When power plug 26 is connected to a power outlet and fan heater 100 is in a power supply state, fan heater 100 maintains a halt state (# 101). Next, when the connection joint 11 is connected to the gas supply port 10 (# 102), the mechanical contact type switch 46 (an example of the gas pipe connection state detection means A) detects that it is in the connection state, Control device 18 is activated (# 103- # 104). If it is detected that the connection is not established, the connection process (# 102) is executed again.
Here, the mechanical contact type switch 46 can be configured to function independently of the control device 18, and can be operated even when the control device 18 is in a stopped state.
Since the power supply state and the mechanical contact type switch 46 are detecting the connection state, the control unit 18 (an example of the gas detection unit activation unit C) activates the gas sensor 20. The state is shifted to a gas detectable state (# 105). When the gas sensor 20 detects that the concentration C of the combustible gas in the atmosphere is equal to or less than the set concentration C0, the gas sensor 20 does not transmit an abnormality detection signal [the flow is then [normal operation flow after (# 107) When it is detected that the concentration is higher than the set concentration C0, an abnormality detection signal is transmitted to the control device 18 (after this, the flow moves to [Gas leakage abnormal flow] shown in FIG. 6).

[Normal operation flow]
In the normal operation flow, when the operation switch 14 is turned on, the operation switch 14 transmits an operation start signal to the control device 18 (# 107). Upon receiving the operation start signal, control device 18 executes fan heater activation processing for activating each device (# 109). Here, the fan heater activation process is a process in which the fan 6 is driven, the on-off valve 24 is opened, the fuel gas G is supplied to the burner 3, the igniter 2 is ignited, and the burner 3 is in a combustion state. When the gas sensor 20 is activated and the combustion start signal is received from the operation switch 14, the control device 18 opens the on-off valve 24 to guide the fuel gas G to the burner 3 and igniter. The combustion is started in such a manner that the fuel gas G is ignited by 4.
In the above (# 107), when the elapsed time T from the start of the gas sensor 20 exceeds a set time T0 (for example, 10 minutes), the control device 18 stops the gas sensor 20 and enters a gas non-detectable state. [Transition returns to (# 101)].

[Ignition confirmation processing]
Next, control device 18 performs an ignition confirmation process (# 110). In the ignition confirmation process, the control device 18 detects the temperature of the burner 3 by the thermocouple 5 and determines the ignition state. The thermocouple 5 transmits the detected temperature to the control device 18, and the detected temperature is set. When it is higher than the temperature, it is determined that the ignition state is normal, and when it is lower, it is determined that the ignition is abnormal. When determining that the ignition is abnormal, the control device 18 displays “ignition abnormality” or the like on the abnormality notification panel 16 of the operation unit B, sounds an alarm buzzer (not shown), and performs a fan heater stop process. Then, the fan heater 100 is shifted to a resting state. Here, the fan heater stop process is a process of stopping each device of the fan heater 100 started in the fan heater start process, but only the fan 6 continues its operation until the set time elapses. . Then, when the operation switch 14 of the operation unit B is turned off, the control device 18 stops the abnormality notification panel 16 and the alarm buzzer [the flow returns to (# 101)].

  If it is determined in the ignition check process that the ignition is normally performed, the gas sensor 20 executes the gas leak detection process again (# 111). Since the gas sensor 20 does not transmit an abnormality detection signal when the concentration C of the combustible gas in the atmosphere is equal to or less than the set concentration C0, the fan heater 100 performs the heating operation in a form in which each operating device is appropriately maintained in the activated state. Execute (# 112). Thereafter, when the operation switch is turned off, fan heater stop processing is executed (# 114) [the flow returns to (# 101)]. In the gas leak detection (# 111), when the gas sensor 20 has a combustible gas concentration C higher than the set concentration C0 in the atmosphere, fan heater stop processing is executed (# 114), which is shown in FIG. Leaked abnormal flow].

[Gas leakage abnormal flow]
In the gas leak detection (# 106) and (# 111) described above, the gas sensor 20 transmits an abnormality detection signal to the control device 18 when a gas leak is detected. The control device 18 displays “gas leak abnormality” or the like on the abnormality notification panel 16 or the like of the operation unit B and sounds an alarm buzzer (not shown) (# 115). The gas leakage may occur due to the gas supply port 10 and the connection joint 11 being connected by biting in a foreign object. If it is made to remove from the opening | mouth 10, gas leakage may be able to be stopped at an early stage. Therefore, the control device 18 displays “Please remove the gas pipe from the fan heater” or the like on the abnormality notification panel 16 or the like. Thereafter, in order to confirm that the connection joint 11 has been removed from the gas supply port 10, the mechanical contact type switch 46 detects whether the gas supply port 10 and the connection joint 11 are connected or not (#). 116). Here, when the connection joint 11 is not removed from the gas supply port 10 and the connection state is continuously detected (when the non-connection state is not detected), the control device 18 supplies the fuel gas G to the burner 3. The on / off valve 24 is closed, and functions as combustion prohibiting means D for executing an operation prohibiting process for prohibiting combustion in the burner 3 (# 117). On the other hand, when the connection joint 11 is removed from the gas supply port 10 and a non-connection state is detected, the connection state is detected again, and the connection joint 11 is once disconnected from the gas supply port 10 and connected again. If confirmed, the operation prohibition process is canceled (# 119) [the flow returns to (# 101)].

  Next, when the power plug 26 is not connected to a power outlet and the power supply is not supplied and the connection joint 11 is connected to the gas supply port 10, the operation of the gas fan heater 100 is assumed. Will be described with reference to FIG.

When the power plug 26 is not connected to the power outlet, the operating devices of the fan heater 100 are stopped (# 201). Here, when the power plug 26 is connected to the power outlet (# 202) and the power supply is switched from the non-power supply state to the power supply state (# 203), power is supplied to the mechanical contact type switch 46 and the connection can be immediately detected. Transition to the state (# 204), it is detected whether the connection joint 11 is connected to the gas supply port 10 or not connected, and in the connection detection state, the operation flow of the fan heater 100 described above is continued. Will be executed. [The flow proceeds to (# 104) in FIG. ]
When the power supply state is not set in (# 203) and when the mechanical contact switch 46 does not shift to the connection detectable state in (# 205), each operating device of the fan heater 100 is in the power supply state. Wait until

[Another embodiment]
(A) In the above embodiment, the gas sensor 20 detects combustible gas. However, the gas sensor 20 may be capable of detecting carbon monoxide gas generated by incomplete combustion in the combustion section, or combustible gas. It is possible to provide both of those that can detect carbon monoxide gas and those that can detect carbon monoxide gas.

  (B) In the above embodiment, a gas leak lamp that lights or blinks when the “gas leak abnormality” state is reached, or an ignition abnormality lamp that lights or blinks when the “ignition abnormality” state occurs. It may be provided, or an alarm buzzer that sounds a beep sound or a sound when a “gas leak abnormality” or “ignition abnormality” state occurs.

  (C) In the above embodiment, the mechanical contact type switch 46 is exemplified as the gas pipe connection state detection means C for detecting the state in which the connection joint 11 is connected to the gas supply port 10. It may be of a coil type that detects the connection state by a change in the magnetic field around the gas supply port 10 or an electric type that detects the connection state by electrically contacting the connection joint 11 and energizing.

  The combustion apparatus according to the present invention can achieve the purpose of the gas detection unit by setting the start time of the gas detection unit to an appropriate time, and achieves power saving in the gas detection unit and wastes the life of the gas detection unit. It can be effectively used as a combustion device that is not wasted.

Schematic configuration diagram of the combustion apparatus of the present invention Block diagram of combustion apparatus of the present invention The schematic block diagram which shows the non-connecting state of the connection coupling of this invention and a gas supply port The schematic block diagram which shows the connection state of the connection coupling of this invention and a gas supply port Flow chart showing the flow of operation of the combustion device of the present invention Flow chart showing the flow of operation of the combustion device of the present invention Flow chart showing the flow of operation of the combustion device of the present invention

Explanation of symbols

1: Combustion chamber 10: Gas supply port 11: Connection joint 12: Gas pipe 18: Control device 20: Gas sensor A: Gas pipe connection state detection means C: Gas detection section D: Operation prohibition means E: Combustion start means

Claims (4)

A combustion section for burning fuel gas;
A gas supply port to which a connection joint at one end of a gas pipe for guiding the fuel gas from the outside is connected;
A gas pipe connection state detection means for detecting whether the gas supply port and the connection joint are in a connected state or in a disconnected state;
A gas detector that detects at least one of a combustible gas or carbon monoxide gas;
Combustion equipment having a power outlet that is a source of external power and a power plug connected thereto,
In the power supply state where the power plug is connected to the power outlet,
A combustion apparatus comprising a gas detection unit starting unit that starts the gas detection unit when the gas pipe connection state detection unit detects that the gas supply port and the connection joint are in the connection state.   When the gas detection unit activation means shifts from the power non-supply state to the power supply state in the power non-supply state where the power plug is not connected to the power outlet, the gas pipe connection state detection means The combustion apparatus according to claim 1, wherein the combustion detector is activated when the connected state is detected and the connected state is detected and the connected state is detected. Comprising combustion start means for starting combustion in the combustion section;
3. The combustion start unit according to claim 1, wherein the combustion start unit starts combustion when the gas detection unit start unit starts the gas detection unit and receives a combustion start command for the combustion unit. Combustion equipment. Combustion prohibiting means capable of prohibiting combustion in the combustion section,
When the combustion prohibition means detects the leakage of the fuel gas, the gas detection unit,
4. The combustion in the combustion section is prohibited until the gas pipe connection state detecting means detects the change from the connected state to the non-connected state until it is detected again as the connected state. 5. Combustion equipment given in one paragraph.

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