WO2020066310A1 - Combustion apparatus and water heater - Google Patents

Combustion apparatus and water heater Download PDF

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Publication number
WO2020066310A1
WO2020066310A1 PCT/JP2019/030965 JP2019030965W WO2020066310A1 WO 2020066310 A1 WO2020066310 A1 WO 2020066310A1 JP 2019030965 W JP2019030965 W JP 2019030965W WO 2020066310 A1 WO2020066310 A1 WO 2020066310A1
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WO
WIPO (PCT)
Prior art keywords
burner
tip
frame rod
output state
side wall
Prior art date
Application number
PCT/JP2019/030965
Other languages
French (fr)
Japanese (ja)
Inventor
竜也 唐木
敬一 三浦
Original Assignee
株式会社ノーリツ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ノーリツ filed Critical 株式会社ノーリツ
Publication of WO2020066310A1 publication Critical patent/WO2020066310A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium

Definitions

  • the present invention relates to a combustion device and a hot water device.
  • Patent Document 1 JP-A-56-149251 (Patent Document 1) describes a safety device for a gas burner having a burner, a first detection element, a second detection element, and a control device.
  • the burner forms a flame upward.
  • the first sensing element is arranged above the burner.
  • the second sensing element is arranged above the first sensing element.
  • the first sensing element When the burner is burning normally, the first sensing element is in contact with the flame formed in the burner, but the second sensing element is not in contact with the flame formed in the burner.
  • the burner When the burner is performing abnormal combustion (incomplete combustion), the flame formed in the burner is extended. As a result, the flame formed on the burner comes into contact with the second sensing element.
  • the control device detects abnormal combustion of the burner by detecting contact between the flame formed on the burner and the second detection element.
  • the flame formed in the burner is extended significantly as the degree of abnormal combustion increases (the oxygen concentration decreases).
  • the present invention has been made in view of the above-mentioned problems of the prior art. More specifically, the present invention provides a combustion device capable of detecting abnormal combustion of a burner when the output of the burner is variable.
  • a combustion device includes a heat exchanger, a burner that forms a flame toward the heat exchanger, a first frame rod and a second frame rod, and a control unit.
  • the heat exchanger has a side wall.
  • the first frame rod has a first tip, and the first tip is located inside the heat exchanger.
  • the second frame rod has a second tip, and the second tip is located inside the heat exchanger.
  • the burner is configured to be controlled by the control unit between a first output state and a second output state.
  • the second output state has a larger output than the first output state.
  • the first tip comes into contact with the flame formed in the burner that is burning normally when the burner is controlled to the second output state, but when the burner is controlled to the first output state, the normal combustion occurs. It is arranged at a position where it does not come into contact with the flame formed in the burning burner.
  • the second tip is located at a position that does not come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the first output state and the second output state.
  • the distance between the first tip and the burner and the distance between the second tip and the burner are equal to each other.
  • the distance between the second tip and the side wall is smaller than the distance between the first tip and the side wall.
  • the combustion device of the above (1) may further include a third frame rod having a third tip, the third tip being located inside the heat exchanger.
  • the burner may be configured to be controlled by the control unit to a first output state, a second output state, and a third output state having an output larger than the second output state.
  • the first tip and the second tip may be arranged at positions where the first tip and the second tip come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the third output state.
  • the third tip may be located at a position that does not come into contact with the flame formed on the burner that is burning normally when controlled to the first output state, the second output state, and the third output state.
  • the distance between the second tip and the burner and the distance between the third tip and the burner may be equal to each other.
  • the distance between the third tip and the side wall may be smaller than the distance between the second tip and the side wall.
  • the length of the first frame rod, the length of the second frame rod, and the length of the third frame rod may be different from each other.
  • a combustion device includes a heat exchanger, a burner that forms a flame toward the heat exchanger, a first frame rod and a second frame rod, and a control unit.
  • the heat exchanger has a side wall.
  • the first frame rod has a first tip, and the first tip is located inside the heat exchanger.
  • the second frame rod has a second tip, and the second tip is located inside the heat exchanger.
  • the burner is configured to be controlled by the control unit between a first output state and a second output state.
  • the second output state has a larger output than the first output state.
  • the first tip comes into contact with the flame formed in the burner that is burning normally when the burner is controlled to the second output state, but when the burner is controlled to the first output state, the normal combustion occurs. It is arranged at a position where it does not come into contact with the flame formed in the burning burner.
  • the second tip is located at a position that does not come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the first output state and the second output state.
  • the distance between the first tip and the burner is smaller than the distance between the second tip and the burner.
  • the distance between the first tip and the side wall and the distance between the second tip and the side wall are equal to each other.
  • the control unit determines that the burner is abnormally burning when detecting that the first frame rod is in contact with the flame formed on the burner while the burner is controlled to the first output state. In addition, when it is detected that the second frame rod is in contact with the flame formed on the burner while the burner is controlled to the second output state, it is determined that the burner is abnormally burning. It is configured as follows.
  • the combustion device of the above (2) may further include a third frame rod having a third end, the third end being located inside the heat exchanger.
  • the burner may be configured to be controlled by the control unit to a first output state, a second output state, and a third output state having an output larger than the second output state.
  • the first tip and the second tip may be arranged at positions where the first tip and the second tip come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the third output state.
  • the third tip may be located at a position that does not come into contact with the flame formed on the burner that is burning normally when controlled to the first output state, the second output state, and the third output state.
  • the distance between the second tip and the burner may be smaller than the distance between the third tip and the burner.
  • the distance between the third tip and the side wall and the distance between the second tip and the side wall may be equal to each other.
  • the control unit determines that the burner is abnormally burning when detecting that the third frame rod is in contact with the flame formed on the burner while the burner is controlled to the third output state. It may be configured to do so.
  • the length of the first frame rod, the length of the second frame rod, and the length of the third frame rod may be equal to each other.
  • the combustion devices of (1) and (2) may further include an insulator portion inserted into the side wall.
  • the first frame rod and the second frame rod may be inserted into the insulator portion.
  • the hot water device includes a combustion device.
  • the combustion device is the combustion device according to the above (1) or (2).
  • the combustion device and the hot water device of the present invention it is possible to detect abnormal combustion of the burner when the output of the burner is variable.
  • FIG. 2 is a schematic diagram of the hot water device 100 according to the first embodiment. It is a perspective view of combustion device 20 concerning a 1st embodiment.
  • FIG. 2 is a top view of the combustion device 20 according to the first embodiment. It is a sectional view of combustion device 20 concerning a 1st embodiment.
  • FIG. 2 is a block diagram of a combustion device 20 according to the first embodiment.
  • 4 is a schematic graph showing the relationship between the output of the burner 21 and the state of each frame rod during normal combustion. 4 is a schematic graph showing the relationship between the output of the burner 21 and the state of each frame rod during abnormal combustion. It is a typical sectional view of combustion device 20 concerning a 2nd embodiment. It is a typical sectional view of combustion device 20 concerning a modification of a 2nd embodiment.
  • the hot water device 100 includes a housing 10, the combustion device 20, pipes 40a to 40g, bypass pipes 41a and 41b, and a bypass servo 42.
  • the combustion device 20 includes a burner 21, a spark plug 22, a first frame rod 23a (not shown in FIG. 1), a second frame rod 23b (not shown in FIG. 1), and a third frame rod 23c ( 1 and a fourth frame rod 23d (not shown in FIG. 1) and a primary heat exchanger 24.
  • the combustion device 20 further includes a secondary heat exchanger 25, a chamber 26, a fan 27, a duct 28, a venturi 29, an orifice 30, and a gas valve 31.
  • the burner 21 is arranged below the chamber 26.
  • the primary heat exchanger 24 is disposed below the burner 21.
  • the ignition plug 22 is arranged below the burner 21.
  • the spark plug 22 is attached to, for example, a primary heat exchanger 24.
  • the secondary heat exchanger 25 is disposed below the primary heat exchanger 24.
  • Fuel gas is supplied from one end of the pipe 40a.
  • the other end of the pipe 40a is connected to the gas valve 31.
  • One end of the pipe 40 b is connected to the gas valve 31.
  • the other end of the pipe 40b is connected to the orifice 30.
  • One end of the pipe 40 c is connected to the orifice 30.
  • the other end of the pipe 40c is connected to the venturi 29.
  • One end of the pipe 40d is connected to the venturi 29.
  • the other end of the pipe 40d is connected to the fan 27.
  • the fan 27 is connected to the chamber 26.
  • ⁇ Water is supplied from one end of the pipe 40e.
  • the other end of the pipe 40e is connected to the secondary heat exchanger 25.
  • One end of the pipe 40f is connected to the secondary heat exchanger 25.
  • the other end of the pipe 40f is connected to the primary heat exchanger 24.
  • One end of the pipe 40 g is connected to the primary heat exchanger 24. Hot water is supplied from the other end of the pipe 40g.
  • bypass pipe 41a One end of the bypass pipe 41a is connected to the pipe 40e. The other end of the bypass pipe 41a is connected to a bypass servo 42. One end of the bypass pipe 41b is connected to a bypass servo 42. The other end of the bypass pipe 41b is connected to the pipe 40g.
  • the gas valve 31 switches between supply and stop of the fuel gas from the pipe 40a. Thereby, the pressure of the fuel gas supplied to the venturi 29 is adjusted.
  • the venturi 29 is configured to take in air from outside the housing 10.
  • the venturi 29 mixes air introduced from outside the housing 10 with fuel gas supplied to the venturi 29 via the pipes 40a, 40b, 40c, the orifice 30, and the gas valve 31 (mixed with air).
  • the fuel gas is hereinafter referred to as a mixed gas).
  • the exhaust gas from the combustion device 20 is exhausted to the outside of the casing 10 through the duct 28.
  • the oxygen concentration in the mixed gas is reduced. And causes abnormal combustion (incomplete combustion) to be described later.
  • the fan 27 has a fan case, an impeller arranged in the fan case, and a motor for rotating the impeller.
  • the fan 27 sucks the mixed gas generated by the venturi 29 via the pipe 40c by the motor rotatingly driving the impeller.
  • the sucked mixed gas is supplied to the burner 21 through the chamber 26.
  • a mixed gas is ejected downward from a flame hole 21 a provided on the lower surface of the burner 21.
  • the ejected mixed gas is ignited by the ignition plug 22 and burns to become a combustion gas.
  • the combustion gas is ejected downward (ie, toward the primary heat exchanger 24).
  • the temperature of the water supplied to the secondary heat exchanger 25 via the pipe 40e increases in the secondary heat exchanger 25 by performing heat exchange with the latent heat of the combustion gas.
  • the water that has passed through the secondary heat exchanger 25 is supplied to the primary heat exchanger 24 via a pipe 40f.
  • the temperature of the water supplied to the primary heat exchanger 24 further increases by performing heat exchange with the sensible heat of the combustion gas in the primary heat exchanger 24.
  • the water that has passed through the primary heat exchanger 24 flows through 40 g of the pipe.
  • Water generated by condensation of water vapor in the combustion gas in the primary heat exchanger 24 (hereinafter, this water is referred to as drain) is discharged to the outside of the casing 10 through the duct 28.
  • FIG. 2 to 4 the illustration of the secondary heat exchanger 25, the fan 27, the duct 28, the venturi 29, the orifice 30, and the gas valve 31 is omitted.
  • FIG. 3 the illustration of the chamber 26 is also omitted to clarify the internal structure of the combustion device 20.
  • the primary heat exchanger 24 has a first side wall 24a, a second side wall 24b, a third side wall 24c, and a fourth side wall 24d.
  • the first side wall 24a and the second side wall 24b face each other in the first direction DR1.
  • the third side wall 24c and the fourth side wall 24d face each other in a second direction DR2 intersecting with the first direction DR1.
  • the third side wall 24c is connected to the first side wall 24a and the second side wall 24b, and the fourth side wall 24d is connected to the first side wall 24a and the second side wall 24b.
  • the primary heat exchanger 24 has a trunk pipe 24ea, a trunk pipe 24eb, and a trunk pipe 24ec.
  • the trunk pipe 24ea, the trunk pipe 24eb, and the trunk pipe 24ec are attached along the inner wall surfaces of the first side wall 24a, the second side wall 24b, and the third side wall 24c.
  • the inner wall surface of the first side wall 24a refers to the surface of the first side wall 24a on the second side wall 24b side
  • the inner wall surface of the second side wall 24b refers to the surface of the second side wall 24b on the first side wall 24a side
  • the inner wall surface of the third side wall 24c refers to the surface of the third side wall 24c on the fourth side wall 24d side
  • the inner wall surface of the fourth side wall 24d refers to the surface of the fourth side wall 24d on the third side wall 24c side.
  • the trunk pipe 24eb is disposed below the trunk pipe 24ea.
  • the torso pipe 24ea and the torso pipe 24eb are spaced apart from each other in the vertical direction.
  • the trunk pipe 24ec is arranged below the trunk pipe 24eb.
  • the torso pipe 24eb and the torso pipe 24ec are spaced apart from each other in the up-down direction.
  • the primary heat exchanger 24 further includes a trunk pipe 24ed and a trunk pipe 24ee.
  • the trunk pipe 24ed and the trunk pipe 24ee are attached to the outer wall surface of the fourth side wall 24d.
  • the outer wall surface of the fourth side wall 24d is a surface of the fourth side wall 24d opposite to the third side wall 24c.
  • the trunk pipe 24ee is located below the trunk pipe 24ed.
  • the torso pipe 24ed and the torso pipe 24ee are spaced apart from each other in the vertical direction.
  • One end of the trunk pipe 24ed is connected to one end of the trunk pipe 24ea.
  • the other end of the trunk pipe 24ea is the end of the trunk pipe 24ea on the water outlet 24h side.
  • the other end of the trunk pipe 24ed is connected to one end of the trunk pipe 24eb.
  • One end of the trunk pipe 24ee is connected to the other end of the trunk pipe 24eb.
  • the other end of the trunk pipe 24ee is connected to one end of the trunk pipe 24ec.
  • the primary heat exchanger 24 further has a pipe 24f.
  • the pipe 24f is connected at one end to the other end of the body pipe 24ec, and at the other end to the water inlet 24g. Many fins are attached to the pipe 24f.
  • the primary heat exchanger 24 further has a water inlet 24g and a water outlet 24h.
  • the water inlet 24g is connected to the other end of the pipe 24f.
  • the water outlet 24h is connected to one end of the pipe 40g.
  • the water inlet 24g and the water outlet 24h are connected to each other by a body pipe 24ea to a body pipe 24ee and a pipe 24f.
  • the chamber 26 has a suction port 26a.
  • the mixed gas supplied from the fan 27 is supplied to the inside of the chamber 26 via the suction port 26a.
  • the burner 21 is mounted below the chamber 26.
  • a plurality of flame holes 21a are formed on the lower surface of the burner 21 as described above. From the flame hole 21a, the mixed gas supplied into the chamber 26 is jetted. In a cross-sectional view along the first direction DR1 (a cross-sectional view orthogonal to the second direction DR2), the lower surface of the burner 21 is curved convexly downward.
  • the ignition plug 22 is disposed below the burner 21.
  • the ignition plug 22 includes a first electrode 22a and a second electrode 22b.
  • the tips of the first electrode 22a and the second electrode 22b are arranged inside the combustion device 20, and the other ends of the first electrode 22a and the second electrode 22b are arranged outside the combustion device 20.
  • the tips of the first electrode 22a and the second electrode 22b face each other.
  • the tips of the first electrode 22a and the second electrode 22b are located below the lower surface of the burner 21.
  • the ignition plug 22 (the first electrode 22a and the second electrode 22b) is inserted into the first side wall 24a. More specifically, the spark plug 22 is inserted into the first side wall 24a between the body pipes 24ea and 24eb.
  • the normal combustion of the burner 21 means that incomplete combustion has not occurred in the fuel gas ejected from the flame hole 21a.
  • the abnormal combustion of the burner 21 means that incomplete combustion has occurred in the fuel gas ejected from the flame hole 21a.
  • incomplete combustion means that the concentration of carbon monoxide in the exhaust gas from the combustion device is higher than the concentration that affects the human body.
  • the first frame rod 23a is inserted into the first side wall 24a. More specifically, the first frame rod 23a is inserted into a first side wall 24a between the body pipes 24ea and 24eb.
  • the tip of the first frame rod 23a is arranged inside the combustion device 20, and the other end of the first frame rod 23a is arranged outside the combustion device 20.
  • the other end of the first frame rod 23a is electrically connected to the control unit 5.
  • the burner 21 is controlled by the control unit 5 to have a first output state and a second output state in which the output is larger than the first output state (the flame formed on the burner 21 is longer than the first output state).
  • the third output state is controlled so that the output is larger than the second output state (the flame formed on the burner 21 is longer than the second output state).
  • the control of the output state of the burner 21 is performed, for example, by changing the flow rate of the mixed gas supplied to the burner 21.
  • the tip of the first frame rod 23a does not come into contact with the flame formed on the burner 21 that is burning normally, but the burner 21 is in the second output state and the second output state. It is arranged at a position where it comes into contact with the flame formed on the burner 21 that is burning normally when it is controlled to the three-output state.
  • the first frame rod 23a is made of, for example, heat-resistant steel. In the flame formed in the flame hole 21a, since the molecules constituting the fuel gas are ionized, the flame exhibits conductivity. Therefore, when the first frame rod 23a is in contact with the flame formed in the flame hole 21a, a current flows between the first frame rod 23a and an electrode (not shown) provided on the burner 21 side. Flows. By detecting this current, it is possible to detect that the first frame rod 23a is in contact with the flame formed in the flame hole 21a.
  • the second frame rod 23b is inserted into the first side wall 24a. More specifically, the second frame rod 23b is inserted into the first side wall 24a between the body pipes 24ea and 24eb.
  • the tip of the second frame rod 23b is arranged inside the combustion device 20, and the other end of the second frame rod 23b is arranged outside the combustion device 20.
  • the other end of the second frame rod 23b is electrically connected to the control unit 5.
  • the tip of the second frame rod 23b does not come into contact with the flame formed in the burner 21 that is burning normally, but the burner 21 is in the second output state. It is arranged at a position where it comes into contact with the flame formed on the burner 21 that is burning normally when it is controlled to the three-output state.
  • the second frame rod 23b is made of, for example, heat-resistant steel.
  • a current flows between the second frame rod 23b and an electrode (not shown) provided on the burner 21 side. . By detecting this current, it is possible to detect that the second frame rod 23b is in contact with the flame formed in the flame hole 21a.
  • the third frame rod 23c is inserted into the first side wall 24a. More specifically, the third frame rod 23c is inserted into the first side wall 24a between the body pipes 24ea and 24eb. The tip of the third frame rod 23c is arranged inside the combustion device 20, and the other end of the third frame rod 23c is arranged outside the combustion device 20. The other end of the third frame rod 23c is electrically connected to the control unit 5.
  • the tip of the third frame rod 23c is located at a position where the burner 21 is not in contact with the flame formed on the burner 21 that is burning normally when the burner 21 is controlled to the first output state, the second output state, and the third output state. Are located in
  • the third frame rod 23c is made of, for example, heat-resistant steel.
  • a current flows between the third frame rod 23c and an electrode (not shown) provided on the burner 21 side. . By detecting this current, it is possible to detect that the third frame rod 23c is in contact with the flame formed in the flame hole 21a.
  • the distance between the tip of the first frame rod 23a and the burner 21 (the distance between the tip of the first frame rod 23a and the lowermost point on the lower surface of the burner 21) and the distance between the tip of the second frame rod 23b and the burner 21 (The distance between the tip of the second frame rod 23b and the lowermost point on the lower surface of the burner 21) and the distance between the tip of the third frame rod 23c and the burner 21 (the tip of the third frame rod 23c). (A distance between the lowermost point of the lower surface of the burner 21) is preferably equal to each other.
  • the portions located farthest from the burner 21 may have the same distance from the burner 21.
  • the distance between the tip of the first frame rod 23a and the burner 21, the distance between the tip of the second frame rod 23b and the burner 21, and the distance between the tip of the third frame rod 23c and the burner 21 are as follows. May be different from each other.
  • the distance between the tip of the first frame rod 23a and the first side wall 24a is larger than the distance between the tip of the second frame rod 23b and the first side wall 24a.
  • the distance between the tip of the second frame rod 23b and the first side wall 24a is larger than the distance between the third frame rod 23c and the first side wall 24a. That is, the portion of the first frame rod 23a farthest from the first side wall 24a is located farther from the first side wall 24a than the portion of the second frame rod 23b farthest from the first side wall 24a.
  • the portion of the second frame rod 23b farthest from the first side wall 24a is located farther from the first side wall 24a than the portion of the third frame rod 23c farthest from the first side wall 24a.
  • the length of the first frame rod 23a, the length of the second frame rod 23b, and the length of the third frame rod 23c may be different from each other. More specifically, the first frame rod 23a may be longer than the second frame rod 23b, and the second frame rod 23b may be longer than the third frame rod 23c.
  • the fourth frame rod 23d is inserted into the chamber 26.
  • the tip of the fourth frame rod 23d is arranged inside the combustion device 20, and the other end of the fourth frame rod 23d is arranged outside the combustion device 20.
  • the other end of the fourth frame rod 23d is electrically connected to the control unit 5.
  • the tip of the fourth frame rod 23d is located below the burner 21.
  • the tip of the fourth frame rod 23d is located above the tip of the first frame rod 23a, the tip of the second frame rod 23b, and the tip of the third frame rod 23c (close to the lower surface of the burner 21).
  • the tip of the fourth frame rod 23d is in contact with the flame formed on the burner 21 that is burning normally when the burner 21 is controlled to the first output state, the second output state, and the third output state.
  • the combustion device 20 may further include an insulator 6a and an insulator 6b.
  • the insulator portions 6a and 6b are made of an insulating material.
  • the insulator portions 6a and 6b are attached to the first side wall 24a. More specifically, the insulator portions 6a and 6b are inserted into through holes provided in the first side wall 24a between the trunk pipes 24ea and 24eb.
  • the insulator portion 6a has a first through hole and a second through hole.
  • a first electrode 22a and a second electrode 22b are inserted into the first through hole and the second through hole, respectively.
  • the insulator portion 6b has a third through hole, a fourth through hole, and a fifth through hole.
  • a first frame rod 23a, a second frame rod 23b, and a third frame rod 23c are inserted into the third through hole, the fourth through hole, and the fifth through hole, respectively.
  • the first frame rod 23a, the second frame rod 23b, and the third frame rod 23c are inserted into the insulator 6b so that the portion overlapping the trunk pipe 24ea in plan view is covered with the insulator 6b.
  • the spark plug 22 (the first electrode 22a and the second electrode 22b) is inserted into the insulator 6a such that a portion overlapping the trunk pipe 24ea in plan view is covered with the insulator 6a.
  • the fan 27, the first frame rod 23a, the second frame rod 23b, the third frame rod 23c, and the fourth frame rod 23d are connected to the control unit 5.
  • the control unit 5 is configured by, for example, a microcontroller.
  • the burner 21 is controlled to a first output state, a second output state, and a third output state by the control unit 5 controlling the fan 27.
  • the burner 21 may be controlled to an output state different from the first output state, the second output state, and the third output state by controlling the fan 27 by the control unit 5.
  • the burner 21 When the burner 21 is controlled to the third output state by the control unit 5, if the burner 21 is burning normally, the first frame rod 23a and the second frame rod 23b come into contact with the flame formed in the burner 21. However, the third frame rod 23c does not come into contact with the flame formed on the burner 21.
  • the fourth frame rod 23d contacts the flame formed on the burner 21 regardless of the output state of the burner 21. .
  • the control unit 5 controls the burner 21 to be in the first output state, and detects that the first frame rod 23a is in contact with the flame formed on the burner 21 (that is, the controller 5 detects that the first frame rod 23a is in contact with the flame formed on the burner 21).
  • the controller 5 detects that the first frame rod 23a is in contact with the flame formed on the burner 21.
  • the control unit 5 controls the burner 21 to be in the second output state, and the first frame rod 23a and the second frame rod 23b are in contact with the flame formed on the burner 21. Is detected (that is, the current flowing through the first frame rod 23a and the second frame rod 23b is detected), it is determined that the burner 21 is abnormally burning.
  • the control unit 5 controls the burner 21 to be in the third output state, and the first frame rod 23a to the third frame rod 23c are in contact with the flame formed in the burner 21. Is detected (that is, the current flowing through the first to third frame rods 23a to 23c is detected), it is determined that the burner 21 is abnormally burning.
  • the base of the flame formed on the burner 21 is separated from the lower surface of the burner 21, and the fourth frame rod 23d detects the contact with the flame formed on the burner 21. May not be possible. Therefore, when the control unit 5 detects that the fourth frame rod 23d is not in contact with the flame formed on the burner 21 (detects that no current is flowing through the fourth frame rod 23d), It is determined that the burner 21 is abnormally burning.
  • the control unit 5 determines which frame rod is in contact with the flame formed in the burner 21, and determines the control state of the burner 21 (the first output state or the second output state). It is determined whether or not the burner 21 is abnormally burning in consideration of whether the burner 21 is in a controlled state).
  • the distance between the tip of the first frame rod 23a and the burner 21 is smaller than the distance between the tip of the second frame rod 23b and the burner 21.
  • the distance between the tip of the second frame rod 23b and the burner 21 is smaller than the distance between the third frame rod 23c and the burner 21. That is, the portion of the first frame rod 23a farthest from the first side wall 24a is closer to the burner 21 than the portion of the second frame rod 23b farthest from the first side wall 24a. It is sufficient that the portion of the second frame rod 23b farthest from the first side wall 24a is closer to the burner 21 than the portion of the third frame rod 23c farthest from the first side wall 24a.
  • the tip of the first frame rod 23a is closer to the lower surface of the burner 21 than the tip of the second frame rod 23b. You may make it become.
  • the tip of the second frame rod 23b may be closer to the lower surface of the burner 21 than the tip of the third frame rod 23c.
  • the distance between the first frame rod 23a and the first side wall 24a, the distance between the second frame rod 23b and the first side wall 24a, and The distance between the three frame rod 23c and the first side wall 24a may be equal to each other. That is, the portion of the first frame rod 23a farthest from the first side wall 24a, the portion of the second frame rod 23b farthest from the first side wall 24a, and the first side wall 24a of the third frame rod 23c. It is sufficient that the distance from the first side wall 24a is equal to the distance from the first side wall 24a.
  • the distance between the first frame rod 23a and the first side wall 24a, the distance between the second frame rod 23b and the first side wall 24a, and the distance between the third frame rod 23c and the first side wall 24a are different from each other. May be.
  • the length of the first frame rod 23a, the length of the second frame rod 23b, and the length of the third frame rod 23c may be equal to each other.
  • combustion device 20 Other configurations of the combustion device 20 are common to the first embodiment and the second embodiment, and thus detailed description is omitted. In addition, the operation of the combustion device 20 is common to the first embodiment and the second embodiment, and thus detailed description is omitted.
  • control unit 5 determines which frame rod is in contact with the flame formed in the burner 21 and determines the control state for the burner 21 (the first output state). In the second control state), it is determined whether or not the burner 21 is abnormally burning.
  • the above embodiment is particularly advantageously applied to a combustion device and a hot water device.

Abstract

A combustion apparatus (20) according to an embodiment of the present invention comprises: a heat exchanger (24); a burner (21) for forming flames toward the heat exchanger; a first frame rod (23a) and a second frame rod (23b); and a controller (5). The heat exchanger has a side wall (24a). The first frame rod has a first tip, and the first tip is positioned inside the heat exchanger. The second frame rod has a second tip, and the second tip is positioned inside the exchanger. The controller is connected to the first frame rod and the second frame rod.

Description

燃焼装置及び温水装置Combustion device and hot water device
　本発明は、燃焼装置及び温水装置に関する。 The present invention relates to a combustion device and a hot water device.
　実開昭５６－１４９２５１号公報（特許文献１）には、バーナと、第１検知素子と、第２検知素子と、制御装置とを有するガスバーナの安全装置が記載されている。バーナは、上方に向かって火炎を形成する。第１検知素子は、バーナの上方に配置されている。第２検知素子は、第１検知素子の上方に配置されている。 JP-A-56-149251 (Patent Document 1) describes a safety device for a gas burner having a burner, a first detection element, a second detection element, and a control device. The burner forms a flame upward. The first sensing element is arranged above the burner. The second sensing element is arranged above the first sensing element.
　バーナが正常燃焼している場合、第１検知素子はバーナに形成されている火炎と接触しているが、第２検知素子はバーナに形成されている火炎と接触していない。バーナが異常燃焼（不完全燃焼）している場合には、バーナに形成されている火炎が伸長される。その結果、バーナに形成されている火炎と第２検知素子とが接触する。制御装置は、バーナに形成されている火炎と第２検知素子との接触を検知することにより、バーナの異常燃焼を検知する。 When the burner is burning normally, the first sensing element is in contact with the flame formed in the burner, but the second sensing element is not in contact with the flame formed in the burner. When the burner is performing abnormal combustion (incomplete combustion), the flame formed in the burner is extended. As a result, the flame formed on the burner comes into contact with the second sensing element. The control device detects abnormal combustion of the burner by detecting contact between the flame formed on the burner and the second detection element.
　なお、異常燃焼の程度が大きいほど（酸素濃度が低いほど）、バーナに形成されている火炎は大きく伸長されることになる。 The flame formed in the burner is extended significantly as the degree of abnormal combustion increases (the oxygen concentration decreases).
実開昭５６－１４９２５１号公報Japanese Utility Model Publication No. 56-149251
　バーナが正常燃焼している場合でも、バーナの出力を増加させることにより、バーナに形成されている火炎が伸長する。特許文献１に記載のガスバーナの安全装置の構成では、バーナの出力が増加することにより火炎が伸長した場合とバーナの異常燃焼により火炎が伸長した場合とを区別することができないので、バーナの出力が可変である場合に対応することが困難である。 で も Even if the burner is burning normally, increasing the output of the burner extends the flame formed in the burner. In the configuration of the safety device for a gas burner described in Patent Document 1, it is not possible to distinguish between a case where the flame is extended due to an increase in the output of the burner and a case where the flame is extended due to abnormal combustion of the burner. Is variable.
　本発明は、上記のような従来技術の問題点に鑑みてなされたものである。より具体的には、本発明は、バーナの出力が可変である場合にバーナの異常燃焼を検知することが可能な燃焼装置を提供するものである。 The present invention has been made in view of the above-mentioned problems of the prior art. More specifically, the present invention provides a combustion device capable of detecting abnormal combustion of a burner when the output of the burner is variable.
　（１）本発明の一態様に係る燃焼装置は、熱交換器と、熱交換器に向かって火炎を形成するバーナと、第１フレームロッド及び第２フレームロッドと、制御部とを備える。熱交換器は、側壁を有している。第１フレームロッドは、第１先端を有し、第１先端が熱交換器の内部に位置している。第２フレームロッドは、第２先端を有し、第２先端が熱交換器の内部に位置している。 (1) A combustion device according to one embodiment of the present invention includes a heat exchanger, a burner that forms a flame toward the heat exchanger, a first frame rod and a second frame rod, and a control unit. The heat exchanger has a side wall. The first frame rod has a first tip, and the first tip is located inside the heat exchanger. The second frame rod has a second tip, and the second tip is located inside the heat exchanger.
　バーナは、制御部により、第１出力状態と、第２出力状態とに制御されるように構成されている。第２出力状態は、第１出力状態よりも出力が大きい。第１先端は、バーナが第２出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触するが、バーナが第１出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触しない位置に配置されている。第２先端は、バーナが第１出力状態及び第２出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触しない位置に配置されている。 The burner is configured to be controlled by the control unit between a first output state and a second output state. The second output state has a larger output than the first output state. The first tip comes into contact with the flame formed in the burner that is burning normally when the burner is controlled to the second output state, but when the burner is controlled to the first output state, the normal combustion occurs. It is arranged at a position where it does not come into contact with the flame formed in the burning burner. The second tip is located at a position that does not come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the first output state and the second output state.
　第１先端とバーナとの距離及び第２先端とバーナとの距離は、互いに等しい。第２先端と側壁との距離は、第１先端と側壁との距離よりも小さい。制御部は、バーナが第１出力状態に制御されている状態で第１フレームロッドとバーナに形成されている火炎とが接触していることを検知した場合にバーナが異常燃焼していると判断するとともに、バーナが第２出力状態に制御されている状態で第２フレームロッドとバーナに形成されている火炎とが接触していることを検知した場合にバーナが異常燃焼していると判断するように構成されている。 距離 The distance between the first tip and the burner and the distance between the second tip and the burner are equal to each other. The distance between the second tip and the side wall is smaller than the distance between the first tip and the side wall. The control unit determines that the burner is abnormally burning when detecting that the first frame rod is in contact with the flame formed on the burner while the burner is controlled to the first output state. In addition, when it is detected that the second frame rod is in contact with the flame formed on the burner while the burner is controlled to the second output state, it is determined that the burner is abnormally burning. It is configured as follows.
　上記（１）の燃焼装置は、第３先端を有し、第３先端が熱交換器の内部に位置している第３フレームロッドをさらに備えていてもよい。バーナは、制御部により、第１出力状態と、第２出力状態と、第２出力状態よりも出力が大きい第３出力状態とに制御されるように構成されていてもよい。第１先端及び第２先端は、バーナが第３出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触する位置に配置されていてもよい。第３先端は、第１出力状態、第２出力状態及び第３出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触しない位置に配置されていてもよい。第２先端とバーナとの距離及び第３先端とバーナとの距離は、互いに等しくてもよい。第３先端と側壁との距離は、第２先端と側壁との距離よりも小さくてもよい。制御部は、バーナが第３出力状態に制御されている状態で第３フレームロッドとバーナに形成されている火炎とが接触していることを検知した場合にバーナが異常燃焼していると判断するように構成されていてもよい。 燃 焼 The combustion device of the above (1) may further include a third frame rod having a third tip, the third tip being located inside the heat exchanger. The burner may be configured to be controlled by the control unit to a first output state, a second output state, and a third output state having an output larger than the second output state. The first tip and the second tip may be arranged at positions where the first tip and the second tip come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the third output state. The third tip may be located at a position that does not come into contact with the flame formed on the burner that is burning normally when controlled to the first output state, the second output state, and the third output state. The distance between the second tip and the burner and the distance between the third tip and the burner may be equal to each other. The distance between the third tip and the side wall may be smaller than the distance between the second tip and the side wall. The control unit determines that the burner is abnormally burning when detecting that the third frame rod is in contact with the flame formed on the burner while the burner is controlled to the third output state. It may be configured to do so.
　上記（１）の燃焼装置において、第１フレームロッドの長さ、第２フレームロッドの長さ及び第３フレームロッドの長さは、互いに異なっていてもよい。 に お い て In the combustion device of the above (1), the length of the first frame rod, the length of the second frame rod, and the length of the third frame rod may be different from each other.
　（２）本発明の他の態様に係る燃焼装置は、熱交換器と、熱交換器に向かって火炎を形成するバーナと、第１フレームロッド及び第２フレームロッドと、制御部とを備える。熱交換器は、側壁を有している。第１フレームロッドは、第１先端を有し、第１先端が熱交換器の内部に位置している。第２フレームロッドは、第２先端を有し、第２先端が熱交換器の内部に位置している。 (2) A combustion device according to another aspect of the present invention includes a heat exchanger, a burner that forms a flame toward the heat exchanger, a first frame rod and a second frame rod, and a control unit. The heat exchanger has a side wall. The first frame rod has a first tip, and the first tip is located inside the heat exchanger. The second frame rod has a second tip, and the second tip is located inside the heat exchanger.
　バーナは、制御部により、第１出力状態と、第２出力状態とに制御されるように構成されている。第２出力状態は、第１出力状態よりも出力が大きい。第１先端は、バーナが第２出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触するが、バーナが第１出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触しない位置に配置されている。第２先端は、バーナが第１出力状態及び第２出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触しない位置に配置されている。 The burner is configured to be controlled by the control unit between a first output state and a second output state. The second output state has a larger output than the first output state. The first tip comes into contact with the flame formed in the burner that is burning normally when the burner is controlled to the second output state, but when the burner is controlled to the first output state, the normal combustion occurs. It is arranged at a position where it does not come into contact with the flame formed in the burning burner. The second tip is located at a position that does not come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the first output state and the second output state.
　第１先端とバーナとの距離は、第２先端とバーナとの距離よりも小さい。第１先端と側壁との距離及び第２先端と側壁との距離は、互いに等しい。制御部は、バーナが第１出力状態に制御されている状態で第１フレームロッドとバーナに形成されている火炎とが接触していることを検知した場合にバーナが異常燃焼していると判断するとともに、バーナが第２出力状態に制御されている状態で第２フレームロッドとバーナに形成されている火炎とが接触していることを検知した場合にバーナが異常燃焼していると判断するように構成されている。 距離 The distance between the first tip and the burner is smaller than the distance between the second tip and the burner. The distance between the first tip and the side wall and the distance between the second tip and the side wall are equal to each other. The control unit determines that the burner is abnormally burning when detecting that the first frame rod is in contact with the flame formed on the burner while the burner is controlled to the first output state. In addition, when it is detected that the second frame rod is in contact with the flame formed on the burner while the burner is controlled to the second output state, it is determined that the burner is abnormally burning. It is configured as follows.
　上記（２）の燃焼装置は、第３先端を有し、第３先端が熱交換器の内部に位置している第３フレームロッドをさらに備えていてもよい。バーナは、制御部により、第１出力状態と、第２出力状態と、第２出力状態よりも出力が大きい第３出力状態とに制御されるように構成されていてもよい。第１先端及び第２先端は、バーナが第３出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触する位置に配置されていてもよい。第３先端は、第１出力状態、第２出力状態及び第３出力状態に制御されている場合に正常燃焼しているバーナに形成されている火炎と接触しない位置に配置されていてもよい。第２先端とバーナとの距離は第３先端とバーナとの距離よりも小さくてもよい。第３先端と側壁との距離及び第２先端と側壁との距離は、互いに等しくてもよい。制御部は、バーナが第３出力状態に制御されている状態で第３フレームロッドとバーナに形成されている火炎とが接触していることを検知した場合にバーナが異常燃焼していると判断するように構成されていてもよい。 燃 焼 The combustion device of the above (2) may further include a third frame rod having a third end, the third end being located inside the heat exchanger. The burner may be configured to be controlled by the control unit to a first output state, a second output state, and a third output state having an output larger than the second output state. The first tip and the second tip may be arranged at positions where the first tip and the second tip come into contact with the flame formed on the burner that is burning normally when the burner is controlled to the third output state. The third tip may be located at a position that does not come into contact with the flame formed on the burner that is burning normally when controlled to the first output state, the second output state, and the third output state. The distance between the second tip and the burner may be smaller than the distance between the third tip and the burner. The distance between the third tip and the side wall and the distance between the second tip and the side wall may be equal to each other. The control unit determines that the burner is abnormally burning when detecting that the third frame rod is in contact with the flame formed on the burner while the burner is controlled to the third output state. It may be configured to do so.
　上記（２）の燃焼装置において、第１フレームロッドの長さ、第２フレームロッドの長さ及び第３フレームロッドの長さは、互いに等しくてもよい。 In the combustion device of (2) above, the length of the first frame rod, the length of the second frame rod, and the length of the third frame rod may be equal to each other.
　上記（１）及び上記（２）の燃焼装置は、側壁に挿入された碍子部をさらに備えていてもよい。碍子部には、第１フレームロッド及び第２フレームロッドが挿入されていてもよい。 燃 焼 The combustion devices of (1) and (2) may further include an insulator portion inserted into the side wall. The first frame rod and the second frame rod may be inserted into the insulator portion.
　（３）本発明の一態様に係る温水装置は、燃焼装置を備える。燃焼装置は、上記（１）又は上記（２）の燃焼装置である。 (3) The hot water device according to one embodiment of the present invention includes a combustion device. The combustion device is the combustion device according to the above (1) or (2).
　本発明に係る燃焼装置及び温水装置によると、バーナの出力が可変である場合にバーナの異常燃焼を検知することが可能となる。 According to the combustion device and the hot water device of the present invention, it is possible to detect abnormal combustion of the burner when the output of the burner is variable.
第１実施形態に係る温水装置１００の概略図である。FIG. 2 is a schematic diagram of the hot water device 100 according to the first embodiment. 第１実施形態に係る燃焼装置２０の斜視図である。It is a perspective view of combustion device 20 concerning a 1st embodiment. 第１実施形態に係る燃焼装置２０の上面図である。FIG. 2 is a top view of the combustion device 20 according to the first embodiment. 第１実施形態に係る燃焼装置２０の断面図である。It is a sectional view of combustion device 20 concerning a 1st embodiment. 第１実施形態に係る燃焼装置２０のブロック図である。FIG. 2 is a block diagram of a combustion device 20 according to the first embodiment. 正常燃焼時におけるバーナ２１の出力と各フレームロッドの状態との関係を示す模式的なグラフである。4 is a schematic graph showing the relationship between the output of the burner 21 and the state of each frame rod during normal combustion. 異常燃焼時におけるバーナ２１の出力と各フレームロッドの状態との関係を示す模式的なグラフである。4 is a schematic graph showing the relationship between the output of the burner 21 and the state of each frame rod during abnormal combustion. 第２実施形態に係る燃焼装置２０の模式的な断面図である。It is a typical sectional view of combustion device 20 concerning a 2nd embodiment. 第２実施形態の変形例に係る燃焼装置２０の模式的な断面図である。It is a typical sectional view of combustion device 20 concerning a modification of a 2nd embodiment.
　本発明の実施形態を、図面を参照しながら説明する。以下の図面においては、同一又は相当する部分に同一の参照符号を付し、重複する説明は繰り返さない。 An embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters, and overlapping description will not be repeated.
　（第１実施形態）
　以下に、第１実施形態を説明する。 (1st Embodiment)
Hereinafter, the first embodiment will be described.
　＜第１実施形態に係る温水装置の概略構成＞
　以下に、第１実施形態に係る温水装置１００の概略構成を説明する。 <Schematic Configuration of Hot Water Device According to First Embodiment>
Hereinafter, a schematic configuration of the hot water device 100 according to the first embodiment will be described.
　図１に示されるように、温水装置１００は、筐体１０と、燃焼装置２０と、配管４０ａ～配管４０ｇと、バイパス配管４１ａ及びバイパス配管４１ｂと、バイパスサーボ４２とを有している。 温 As shown in FIG. 1, the hot water device 100 includes a housing 10, the combustion device 20, pipes 40a to 40g, bypass pipes 41a and 41b, and a bypass servo 42.
　燃焼装置２０は、バーナ２１と、点火プラグ２２と、第１フレームロッド２３ａ（図１中において図示せず）、第２フレームロッド２３ｂ（図１中において図示せず）、第３フレームロッド２３ｃ（図１中において図示せず）及び第４フレームロッド２３ｄ（図１中において図示せず）と、一次熱交換器２４とを有している。燃焼装置２０は、さらに、二次熱交換器２５と、チャンバ２６と、ファン２７と、ダクト２８と、ベンチュリ２９と、オリフィス３０と、ガスバルブ３１とを有している。 The combustion device 20 includes a burner 21, a spark plug 22, a first frame rod 23a (not shown in FIG. 1), a second frame rod 23b (not shown in FIG. 1), and a third frame rod 23c ( 1 and a fourth frame rod 23d (not shown in FIG. 1) and a primary heat exchanger 24. The combustion device 20 further includes a secondary heat exchanger 25, a chamber 26, a fan 27, a duct 28, a venturi 29, an orifice 30, and a gas valve 31.
　なお、バーナ２１、点火プラグ２２、第１フレームロッド２３ａ、第２フレームロッド２３ｂ、第３フレームロッド２３ｃ及び第４フレームロッド２３ｄ、一次熱交換器２４及び二次熱交換器２５、チャンバ２６、ファン２７、ダクト２８、ベンチュリ２９、オリフィス３０、ガスバルブ３１、配管４０ａ～配管４０ｇ、バイパス配管４１ａ、バイパス配管４１ｂ並びにバイパスサーボ４２は、筐体１０内に配置されている。 The burner 21, the spark plug 22, the first frame rod 23a, the second frame rod 23b, the third frame rod 23c and the fourth frame rod 23d, the primary heat exchanger 24 and the secondary heat exchanger 25, the chamber 26, the fan 27, a duct 28, a venturi 29, an orifice 30, a gas valve 31, pipes 40a to 40g, a bypass pipe 41a, a bypass pipe 41b, and a bypass servo 42 are arranged in the housing 10.
　バーナ２１は、チャンバ２６の下方に配置されている。一次熱交換器２４は、バーナ２１の下方に配置されている。点火プラグ２２は、バーナ２１の下方に配置されている。点火プラグ２２は、例えば一次熱交換器２４に取り付けられている。二次熱交換器２５は、一次熱交換器２４の下方に配置されている。 The burner 21 is arranged below the chamber 26. The primary heat exchanger 24 is disposed below the burner 21. The ignition plug 22 is arranged below the burner 21. The spark plug 22 is attached to, for example, a primary heat exchanger 24. The secondary heat exchanger 25 is disposed below the primary heat exchanger 24.
　配管４０ａの一方端からは、燃料ガスが供給される。配管４０ａの他方端は、ガスバルブ３１に接続されている。配管４０ｂの一方端は、ガスバルブ３１に接続されている。配管４０ｂの他方端は、オリフィス３０に接続されている。配管４０ｃの一方端は、オリフィス３０に接続されている。配管４０ｃの他方端は、ベンチュリ２９に接続されている。 燃料 Fuel gas is supplied from one end of the pipe 40a. The other end of the pipe 40a is connected to the gas valve 31. One end of the pipe 40 b is connected to the gas valve 31. The other end of the pipe 40b is connected to the orifice 30. One end of the pipe 40 c is connected to the orifice 30. The other end of the pipe 40c is connected to the venturi 29.
　配管４０ｄの一方端は、ベンチュリ２９に接続されている。配管４０ｄの他方端は、ファン２７に接続されている。ファン２７は、チャンバ２６に接続されている。 一方 One end of the pipe 40d is connected to the venturi 29. The other end of the pipe 40d is connected to the fan 27. The fan 27 is connected to the chamber 26.
　配管４０ｅの一方端からは、水が供給される。配管４０ｅの他方端は、二次熱交換器２５に接続されている。配管４０ｆの一方端は、二次熱交換器２５に接続されている。配管４０ｆの他方端は、一次熱交換器２４に接続されている。配管４０ｇの一方端は、一次熱交換器２４に接続されている。配管４０ｇの他方端からは、出湯が行われる。 水 Water is supplied from one end of the pipe 40e. The other end of the pipe 40e is connected to the secondary heat exchanger 25. One end of the pipe 40f is connected to the secondary heat exchanger 25. The other end of the pipe 40f is connected to the primary heat exchanger 24. One end of the pipe 40 g is connected to the primary heat exchanger 24. Hot water is supplied from the other end of the pipe 40g.
　バイパス配管４１ａの一方端は、配管４０ｅに接続されている。バイパス配管４１ａの他方端は、バイパスサーボ４２に接続されている。バイパス配管４１ｂの一方端は、バイパスサーボ４２に接続されている。バイパス配管４１ｂの他方端は、配管４０ｇに接続されている。 一方 One end of the bypass pipe 41a is connected to the pipe 40e. The other end of the bypass pipe 41a is connected to a bypass servo 42. One end of the bypass pipe 41b is connected to a bypass servo 42. The other end of the bypass pipe 41b is connected to the pipe 40g.
　ガスバルブ３１は、配管４０ａからの燃料ガスの供給及び停止を切り替える。これにより、ベンチュリ２９に供給される燃料ガスの圧力が調整される。 The gas valve 31 switches between supply and stop of the fuel gas from the pipe 40a. Thereby, the pressure of the fuel gas supplied to the venturi 29 is adjusted.
　ベンチュリ２９は、筐体１０の外部から空気を取り入れるように構成されている。ベンチュリ２９は、筐体１０の外部から取り入れた空気と、配管４０ａ、配管４０ｂ、配管４０ｃ、オリフィス３０及びガスバルブ３１を介してベンチュリ２９に供給される燃料ガスとを混合する（空気と混合された燃料ガスを、以下において、混合ガスという）。 The venturi 29 is configured to take in air from outside the housing 10. The venturi 29 mixes air introduced from outside the housing 10 with fuel gas supplied to the venturi 29 via the pipes 40a, 40b, 40c, the orifice 30, and the gas valve 31 (mixed with air). The fuel gas is hereinafter referred to as a mixed gas).
　なお、燃焼装置２０からの排気は、ダクト２８を介して、筐体１０の外部に排出されるが、当該排気の一部が再びベンチュリ２９を介して取り込まれることにより、混合ガス中の酸素濃度が低下し、後述する異常燃焼（不完全燃焼）の原因となる。 The exhaust gas from the combustion device 20 is exhausted to the outside of the casing 10 through the duct 28. When a part of the exhaust gas is again taken in through the venturi 29, the oxygen concentration in the mixed gas is reduced. And causes abnormal combustion (incomplete combustion) to be described later.
　ファン２７は、ファンケースと、ファンケース内に配置されている羽根車と、羽根車を回転駆動するモータとを有している。ファン２７は、モータが羽根車を回転駆動させることにより、配管４０ｃを介して、ベンチュリ２９で生成された混合ガスを吸入する。吸入された混合ガスは、チャンバ２６を介してバーナ２１へと供給される。 The fan 27 has a fan case, an impeller arranged in the fan case, and a motor for rotating the impeller. The fan 27 sucks the mixed gas generated by the venturi 29 via the pipe 40c by the motor rotatingly driving the impeller. The sucked mixed gas is supplied to the burner 21 through the chamber 26.
　バーナ２１の下面に設けられた炎孔２１ａからは、下方に向かって混合ガスが噴出される。噴出された混合ガスは、点火プラグ２２により点火されて燃焼し、燃焼ガスとなる。燃焼ガスは、下方に向かって（すなわち、一次熱交換器２４に向かって）噴出する。 混合 A mixed gas is ejected downward from a flame hole 21 a provided on the lower surface of the burner 21. The ejected mixed gas is ignited by the ignition plug 22 and burns to become a combustion gas. The combustion gas is ejected downward (ie, toward the primary heat exchanger 24).
　配管４０ｅを介して二次熱交換器２５に供給された水は、二次熱交換器２５において、燃焼ガスの潜熱と熱交換を行うことにより、温度が上昇する。二次熱交換器２５を通過した水は、配管４０ｆを介して一次熱交換器２４に供給される。一次熱交換器２４に供給された水は、一次熱交換器２４において、燃焼ガスの顕熱と熱交換を行うことにより、温度がさらに上昇する。一次熱交換器２４を通過した水は、配管４０ｇを流れる。 (4) The temperature of the water supplied to the secondary heat exchanger 25 via the pipe 40e increases in the secondary heat exchanger 25 by performing heat exchange with the latent heat of the combustion gas. The water that has passed through the secondary heat exchanger 25 is supplied to the primary heat exchanger 24 via a pipe 40f. The temperature of the water supplied to the primary heat exchanger 24 further increases by performing heat exchange with the sensible heat of the combustion gas in the primary heat exchanger 24. The water that has passed through the primary heat exchanger 24 flows through 40 g of the pipe.
　配管４０ｅを流れる水の一部は、バイパス配管４１ａへと流れる。バイパス配管４１ａからバイパス配管４１ｂへと流れる水の流量は、バイパスサーボ４２により制御される。バイパス配管４１ｂを流れる水は、配管４０ｇを流れる水と混合される。すなわち、配管４０ｇの他方端から出湯される水の温度は、バイパスサーボ４２がバイパス配管４１ａからバイパス配管４１ｂへと流れる水の流量を制御することにより、調整される。 一部 Part of the water flowing through the pipe 40e flows to the bypass pipe 41a. The flow rate of water flowing from the bypass pipe 41a to the bypass pipe 41b is controlled by a bypass servo 42. Water flowing through the bypass pipe 41b is mixed with water flowing through the pipe 40g. That is, the temperature of the water discharged from the other end of the pipe 40g is adjusted by the bypass servo 42 controlling the flow rate of the water flowing from the bypass pipe 41a to the bypass pipe 41b.
　一次熱交換器２４内において燃焼ガス中の水蒸気が凝縮することにより発生した水（以下においては、この水を、ドレンという）は、ダクト２８を通って筐体１０の外部へと排出される。 水 Water generated by condensation of water vapor in the combustion gas in the primary heat exchanger 24 (hereinafter, this water is referred to as drain) is discharged to the outside of the casing 10 through the duct 28.
　（第１実施形態に係る燃焼装置の詳細構成）
　以下に、第１実施形態に係る燃焼装置２０の詳細構成を、図２、図３及び図４を参照して説明する。図２～図４においては、二次熱交換器２５、ファン２７、ダクト２８、ベンチュリ２９、オリフィス３０及びガスバルブ３１の図示が省略されている。また、図３においては、燃焼装置２０の内部構造を明らかにするため、チャンバ２６の図示も省略されている。 (Detailed Configuration of Combustion Device According to First Embodiment)
Hereinafter, a detailed configuration of the combustion device 20 according to the first embodiment will be described with reference to FIGS. 2, 3, and 4. FIG. 2 to 4, the illustration of the secondary heat exchanger 25, the fan 27, the duct 28, the venturi 29, the orifice 30, and the gas valve 31 is omitted. In FIG. 3, the illustration of the chamber 26 is also omitted to clarify the internal structure of the combustion device 20.
　一次熱交換器２４は、第１側壁２４ａと、第２側壁２４ｂと、第３側壁２４ｃと、第４側壁２４ｄとを有している。第１側壁２４ａ及び第２側壁２４ｂは、第１方向ＤＲ１において、互いに対向している。第３側壁２４ｃ及び第４側壁２４ｄは、第１方向ＤＲ１と交差する第２方向ＤＲ２において、互いに対向している。第３側壁２４ｃは、第１側壁２４ａ及び第２側壁２４ｂに連なっており、第４側壁２４ｄは、第１側壁２４ａ及び第２側壁２４ｂに連なっている。 The primary heat exchanger 24 has a first side wall 24a, a second side wall 24b, a third side wall 24c, and a fourth side wall 24d. The first side wall 24a and the second side wall 24b face each other in the first direction DR1. The third side wall 24c and the fourth side wall 24d face each other in a second direction DR2 intersecting with the first direction DR1. The third side wall 24c is connected to the first side wall 24a and the second side wall 24b, and the fourth side wall 24d is connected to the first side wall 24a and the second side wall 24b.
　一次熱交換器２４は、胴パイプ２４ｅａと、胴パイプ２４ｅｂと、胴パイプ２４ｅｃとを有している。胴パイプ２４ｅａ、胴パイプ２４ｅｂ及び胴パイプ２４ｅｃは、第１側壁２４ａ、第２側壁２４ｂ及び第３側壁２４ｃの内壁面に沿って取り付けられている。 The primary heat exchanger 24 has a trunk pipe 24ea, a trunk pipe 24eb, and a trunk pipe 24ec. The trunk pipe 24ea, the trunk pipe 24eb, and the trunk pipe 24ec are attached along the inner wall surfaces of the first side wall 24a, the second side wall 24b, and the third side wall 24c.
　第１側壁２４ａの内壁面とは、第１側壁２４ａの第２側壁２４ｂ側の面をいい、第２側壁２４ｂの内壁面とは、第２側壁２４ｂの第１側壁２４ａ側の面をいう。第３側壁２４ｃの内壁面とは、第３側壁２４ｃの第４側壁２４ｄ側の面をいい、第４側壁２４ｄの内壁面とは、第４側壁２４ｄの第３側壁２４ｃ側の面をいう。 内 The inner wall surface of the first side wall 24a refers to the surface of the first side wall 24a on the second side wall 24b side, and the inner wall surface of the second side wall 24b refers to the surface of the second side wall 24b on the first side wall 24a side. The inner wall surface of the third side wall 24c refers to the surface of the third side wall 24c on the fourth side wall 24d side, and the inner wall surface of the fourth side wall 24d refers to the surface of the fourth side wall 24d on the third side wall 24c side.
　胴パイプ２４ｅｂは、胴パイプ２４ｅａの下方に配置されている。胴パイプ２４ｅａ及び胴パイプ２４ｅｂは、上下方向において互いに間隔を置いて配置されている。胴パイプ２４ｅｃは、胴パイプ２４ｅｂの下方に配置されている。胴パイプ２４ｅｂ及び胴パイプ２４ｅｃは、上下方向において互いに間隔を置いて配置されている。 The trunk pipe 24eb is disposed below the trunk pipe 24ea. The torso pipe 24ea and the torso pipe 24eb are spaced apart from each other in the vertical direction. The trunk pipe 24ec is arranged below the trunk pipe 24eb. The torso pipe 24eb and the torso pipe 24ec are spaced apart from each other in the up-down direction.
　一次熱交換器２４は、胴パイプ２４ｅｄと、胴パイプ２４ｅｅとをさらに有している。胴パイプ２４ｅｄ及び胴パイプ２４ｅｅは、第４側壁２４ｄの外壁面に取り付けられている。なお、第４側壁２４ｄの外壁面とは、第４側壁２４ｄの第３側壁２４ｃとは反対側の面である。胴パイプ２４ｅｅは、胴パイプ２４ｅｄの下方に位置している。胴パイプ２４ｅｄ及び胴パイプ２４ｅｅは、上下方向において互いに間隔を置いて配置されている。 The primary heat exchanger 24 further includes a trunk pipe 24ed and a trunk pipe 24ee. The trunk pipe 24ed and the trunk pipe 24ee are attached to the outer wall surface of the fourth side wall 24d. Note that the outer wall surface of the fourth side wall 24d is a surface of the fourth side wall 24d opposite to the third side wall 24c. The trunk pipe 24ee is located below the trunk pipe 24ed. The torso pipe 24ed and the torso pipe 24ee are spaced apart from each other in the vertical direction.
　胴パイプ２４ｅｄの一方端は、胴パイプ２４ｅａの一方端に接続されている。なお、胴パイプ２４ｅａの他方端は、出水口２４ｈ側の胴パイプ２４ｅａの端である。胴パイプ２４ｅｄの他方端は、胴パイプ２４ｅｂの一方端に接続されている。胴パイプ２４ｅｅの一方端は、胴パイプ２４ｅｂの他方端に接続されている。胴パイプ２４ｅｅの他方端は、胴パイプ２４ｅｃの一方端に接続されている。 一方 One end of the trunk pipe 24ed is connected to one end of the trunk pipe 24ea. The other end of the trunk pipe 24ea is the end of the trunk pipe 24ea on the water outlet 24h side. The other end of the trunk pipe 24ed is connected to one end of the trunk pipe 24eb. One end of the trunk pipe 24ee is connected to the other end of the trunk pipe 24eb. The other end of the trunk pipe 24ee is connected to one end of the trunk pipe 24ec.
　一次熱交換器２４は、配管２４ｆをさらに有している。配管２４ｆは、一方端において胴パイプ２４ｅｃの他方端に接続されており、他方端において入水口２４ｇに接続されている。配管２４ｆには、多数のフィンが取り付けられている。 The primary heat exchanger 24 further has a pipe 24f. The pipe 24f is connected at one end to the other end of the body pipe 24ec, and at the other end to the water inlet 24g. Many fins are attached to the pipe 24f.
　一次熱交換器２４は、入水口２４ｇと、出水口２４ｈとをさらに有している。入水口２４ｇは、配管２４ｆの他方端に接続されている。出水口２４ｈは、配管４０ｇの一方端に接続されている。入水口２４ｇ及び出水口２４ｈは、胴パイプ２４ｅａ～胴パイプ２４ｅｅ及び配管２４ｆにより、互いに接続されている。 The primary heat exchanger 24 further has a water inlet 24g and a water outlet 24h. The water inlet 24g is connected to the other end of the pipe 24f. The water outlet 24h is connected to one end of the pipe 40g. The water inlet 24g and the water outlet 24h are connected to each other by a body pipe 24ea to a body pipe 24ee and a pipe 24f.
　チャンバ２６は、吸入口２６ａを有している。ファン２７から供給される混合ガスは、吸入口２６ａを介して、チャンバ２６の内部に供給される。チャンバ２６の下方には、バーナ２１が取り付けられている。 The chamber 26 has a suction port 26a. The mixed gas supplied from the fan 27 is supplied to the inside of the chamber 26 via the suction port 26a. The burner 21 is mounted below the chamber 26.
　バーナ２１の下面には、上記のとおり、複数の炎孔２１ａが形成されている。炎孔２１ａからは、チャンバ２６の内部に供給された混合ガスが噴出する。第１方向ＤＲ１に沿う断面視（第２方向ＤＲ２に直交する断面視）において、バーナ２１の下面は、下に凸状に湾曲している。 A plurality of flame holes 21a are formed on the lower surface of the burner 21 as described above. From the flame hole 21a, the mixed gas supplied into the chamber 26 is jetted. In a cross-sectional view along the first direction DR1 (a cross-sectional view orthogonal to the second direction DR2), the lower surface of the burner 21 is curved convexly downward.
　上記のとおり、バーナ２１の下方には、点火プラグ２２が配置されている。点火プラグ２２は、第１電極２２ａと、第２電極２２ｂとにより構成されている。第１電極２２ａ及び第２電極２２ｂの先端は、燃焼装置２０の内部に配置されており、第１電極２２ａ及び第２電極２２ｂの他方端は、燃焼装置２０の外部に配置されている。 点火 As described above, the ignition plug 22 is disposed below the burner 21. The ignition plug 22 includes a first electrode 22a and a second electrode 22b. The tips of the first electrode 22a and the second electrode 22b are arranged inside the combustion device 20, and the other ends of the first electrode 22a and the second electrode 22b are arranged outside the combustion device 20.
　第１電極２２ａ及び第２電極２２ｂの先端は、互いに対向している。第１電極２２ａ及び第２電極２２ｂの先端は、バーナ２１の下面の下方に位置している。第１電極２２ａと第２電極２２ｂとの間に通電がなされることにより、第１電極２２ａの先端と第２電極２２ｂの先端との間にスパークが発生し、炎孔２１ａから噴出する混合ガスが点火される。 先端 The tips of the first electrode 22a and the second electrode 22b face each other. The tips of the first electrode 22a and the second electrode 22b are located below the lower surface of the burner 21. When a current is applied between the first electrode 22a and the second electrode 22b, a spark is generated between the tip of the first electrode 22a and the tip of the second electrode 22b, and the mixed gas ejected from the flame hole 21a Is ignited.
　点火プラグ２２（第１電極２２ａ及び第２電極２２ｂ）は、第１側壁２４ａに挿入されている。より具体的には、点火プラグ２２は、胴パイプ２４ｅａと胴パイプ２４ｅｂとの間にある第１側壁２４ａに挿入されている。 The ignition plug 22 (the first electrode 22a and the second electrode 22b) is inserted into the first side wall 24a. More specifically, the spark plug 22 is inserted into the first side wall 24a between the body pipes 24ea and 24eb.
　バーナ２１が正常燃焼しているとは、炎孔２１ａから噴出する燃料ガスに不完全燃焼が生じていないことをいう。他方で、バーナ２１が異常燃焼しているとは、炎孔２１ａから噴出する燃料ガスに不完全燃焼が生じていることをいう。ここで、不完全燃焼とは、燃焼装置からの排出ガス中の一酸化炭素濃度が人体に影響を及ぼす濃度以上となっていることをいう。 正常 The normal combustion of the burner 21 means that incomplete combustion has not occurred in the fuel gas ejected from the flame hole 21a. On the other hand, the abnormal combustion of the burner 21 means that incomplete combustion has occurred in the fuel gas ejected from the flame hole 21a. Here, incomplete combustion means that the concentration of carbon monoxide in the exhaust gas from the combustion device is higher than the concentration that affects the human body.
　第１フレームロッド２３ａは、第１側壁２４ａに挿入されている。より具体的には、第１フレームロッド２３ａは、胴パイプ２４ｅａと胴パイプ２４ｅｂとの間にある第１側壁２４ａに挿入されている。第１フレームロッド２３ａの先端は、燃焼装置２０の内部に配置されており、第１フレームロッド２３ａの他方端は、燃焼装置２０の外部に配置されている。第１フレームロッド２３ａの他方端は、制御部５に電気的に接続されている。 The first frame rod 23a is inserted into the first side wall 24a. More specifically, the first frame rod 23a is inserted into a first side wall 24a between the body pipes 24ea and 24eb. The tip of the first frame rod 23a is arranged inside the combustion device 20, and the other end of the first frame rod 23a is arranged outside the combustion device 20. The other end of the first frame rod 23a is electrically connected to the control unit 5.
　バーナ２１は、制御部５によって、第１出力状態と、第１出力状態よりも出力状態よりも出力が大きい（第１出力状態よりもバーナ２１に形成される火炎が長い）第２出力状態と、第２出力状態よりも出力が大きい（第２出力状態よりもバーナ２１に形成される火炎が長い）第３出力状態とに制御される。なお、バーナ２１の出力状態の制御は、例えばバーナ２１に供給される混合ガスの流量を変化させることにより行われる。 The burner 21 is controlled by the control unit 5 to have a first output state and a second output state in which the output is larger than the first output state (the flame formed on the burner 21 is longer than the first output state). The third output state is controlled so that the output is larger than the second output state (the flame formed on the burner 21 is longer than the second output state). The control of the output state of the burner 21 is performed, for example, by changing the flow rate of the mixed gas supplied to the burner 21.
　第１フレームロッド２３ａの先端は、バーナ２１が第１出力状態に制御されている場合に正常燃焼しているバーナ２１に形成されている火炎と接触しないが、バーナ２１が第２出力状態及び第３出力状態に制御されている場合に正常燃焼しているバーナ２１に形成されている火炎に接触する位置に配置されている。 When the burner 21 is controlled to the first output state, the tip of the first frame rod 23a does not come into contact with the flame formed on the burner 21 that is burning normally, but the burner 21 is in the second output state and the second output state. It is arranged at a position where it comes into contact with the flame formed on the burner 21 that is burning normally when it is controlled to the three-output state.
　第１フレームロッド２３ａは、例えば、耐熱鋼で構成されている。炎孔２１ａに形成されている火炎中においては、燃料ガスを構成する分子が電離しているため、当該火炎は、導電性を呈する。そのため、第１フレームロッド２３ａが炎孔２１ａに形成されている火炎と接触している場合、第１フレームロッド２３ａとバーナ２１側に設けられた電極（図示せず）との間には、電流が流れる。この電流を検知することにより、第１フレームロッド２３ａと炎孔２１ａに形成されている火炎とが接触していることを検知することができる。 The first frame rod 23a is made of, for example, heat-resistant steel. In the flame formed in the flame hole 21a, since the molecules constituting the fuel gas are ionized, the flame exhibits conductivity. Therefore, when the first frame rod 23a is in contact with the flame formed in the flame hole 21a, a current flows between the first frame rod 23a and an electrode (not shown) provided on the burner 21 side. Flows. By detecting this current, it is possible to detect that the first frame rod 23a is in contact with the flame formed in the flame hole 21a.
　第２フレームロッド２３ｂは、第１側壁２４ａに挿入されている。より具体的には、第２フレームロッド２３ｂは、胴パイプ２４ｅａと胴パイプ２４ｅｂとの間にある第１側壁２４ａに挿入されている。第２フレームロッド２３ｂの先端は、燃焼装置２０の内部に配置されており、第２フレームロッド２３ｂの他方端は、燃焼装置２０の外部に配置されている。第２フレームロッド２３ｂの他方端は、制御部５に電気的に接続されている。 The second frame rod 23b is inserted into the first side wall 24a. More specifically, the second frame rod 23b is inserted into the first side wall 24a between the body pipes 24ea and 24eb. The tip of the second frame rod 23b is arranged inside the combustion device 20, and the other end of the second frame rod 23b is arranged outside the combustion device 20. The other end of the second frame rod 23b is electrically connected to the control unit 5.
　第２フレームロッド２３ｂの先端は、バーナ２１が第１出力状態及び第２出力状態に制御されている場合に正常燃焼しているバーナ２１に形成されている火炎と接触しないが、バーナ２１が第３出力状態に制御されている場合に正常燃焼しているバーナ２１に形成されている火炎に接触する位置に配置されている。 When the burner 21 is controlled to the first output state and the second output state, the tip of the second frame rod 23b does not come into contact with the flame formed in the burner 21 that is burning normally, but the burner 21 is in the second output state. It is arranged at a position where it comes into contact with the flame formed on the burner 21 that is burning normally when it is controlled to the three-output state.
　第２フレームロッド２３ｂは、例えば、耐熱鋼で構成されている。第２フレームロッド２３ｂが炎孔２１ａに形成されている火炎と接触している場合、第２フレームロッド２３ｂとバーナ２１側に設けられた電極（図示せず）との間には、電流が流れる。この電流を検知することにより、第２フレームロッド２３ｂと炎孔２１ａに形成されている火炎とが接触していることを検知することができる。 ２The second frame rod 23b is made of, for example, heat-resistant steel. When the second frame rod 23b is in contact with the flame formed in the flame hole 21a, a current flows between the second frame rod 23b and an electrode (not shown) provided on the burner 21 side. . By detecting this current, it is possible to detect that the second frame rod 23b is in contact with the flame formed in the flame hole 21a.
　第３フレームロッド２３ｃは、第１側壁２４ａに挿入されている。より具体的には、第３フレームロッド２３ｃは、胴パイプ２４ｅａと胴パイプ２４ｅｂとの間にある第１側壁２４ａに挿入されている。第３フレームロッド２３ｃの先端は、燃焼装置２０の内部に配置されており、第３フレームロッド２３ｃの他方端は、燃焼装置２０の外部に配置されている。第３フレームロッド２３ｃの他方端は、制御部５に電気的に接続されている。 The third frame rod 23c is inserted into the first side wall 24a. More specifically, the third frame rod 23c is inserted into the first side wall 24a between the body pipes 24ea and 24eb. The tip of the third frame rod 23c is arranged inside the combustion device 20, and the other end of the third frame rod 23c is arranged outside the combustion device 20. The other end of the third frame rod 23c is electrically connected to the control unit 5.
　第３フレームロッド２３ｃの先端は、バーナ２１が第１出力状態、第２出力状態及び第３出力状態に制御されている場合に正常燃焼しているバーナ２１に形成されている火炎と接触しない位置に配置されている。 The tip of the third frame rod 23c is located at a position where the burner 21 is not in contact with the flame formed on the burner 21 that is burning normally when the burner 21 is controlled to the first output state, the second output state, and the third output state. Are located in
　第３フレームロッド２３ｃは、例えば、耐熱鋼で構成されている。第３フレームロッド２３ｃが炎孔２１ａに形成されている火炎と接触している場合、第３フレームロッド２３ｃとバーナ２１側に設けられた電極（図示せず）との間には、電流が流れる。この電流を検知することにより、第３フレームロッド２３ｃと炎孔２１ａに形成されている火炎とが接触していることを検知することができる。 ３The third frame rod 23c is made of, for example, heat-resistant steel. When the third frame rod 23c is in contact with the flame formed in the flame hole 21a, a current flows between the third frame rod 23c and an electrode (not shown) provided on the burner 21 side. . By detecting this current, it is possible to detect that the third frame rod 23c is in contact with the flame formed in the flame hole 21a.
　第１フレームロッド２３ａの先端とバーナ２１との間の距離（第１フレームロッド２３ａの先端とバーナ２１下面の最下点との間の距離）、第２フレームロッド２３ｂの先端とバーナ２１との間の距離（第２フレームロッド２３ｂの先端とバーナ２１下面の最下点との間の距離）及び第３フレームロッド２３ｃの先端とバーナ２１との間の距離（第３フレームロッド２３ｃの先端とバーナ２１下面の最下点との間の距離）は、互いに等しくなっていることが好ましい。すなわち、第１フレームロッド２３ａの第１側壁２４ａから最も離れた位置にある部分、第２フレームロッド２３ｂの第１側壁２４ａから最も離れた位置にある部分及び第３フレームロッド２３ｃの第１側壁２４ａから最も離れた位置にある部分は、バーナ２１からの距離が互いに等しくなっていてもよい。なお、第１フレームロッド２３ａの先端とバーナ２１との間の距離、第２フレームロッド２３ｂの先端とバーナ２１との間の距離及び第３フレームロッド２３ｃの先端とバーナ２１との間の距離は、互いに異なっていてもよい。 The distance between the tip of the first frame rod 23a and the burner 21 (the distance between the tip of the first frame rod 23a and the lowermost point on the lower surface of the burner 21) and the distance between the tip of the second frame rod 23b and the burner 21 (The distance between the tip of the second frame rod 23b and the lowermost point on the lower surface of the burner 21) and the distance between the tip of the third frame rod 23c and the burner 21 (the tip of the third frame rod 23c). (A distance between the lowermost point of the lower surface of the burner 21) is preferably equal to each other. That is, the portion of the first frame rod 23a farthest from the first side wall 24a, the portion of the second frame rod 23b farthest from the first side wall 24a, and the first side wall 24a of the third frame rod 23c. The portions located farthest from the burner 21 may have the same distance from the burner 21. The distance between the tip of the first frame rod 23a and the burner 21, the distance between the tip of the second frame rod 23b and the burner 21, and the distance between the tip of the third frame rod 23c and the burner 21 are as follows. May be different from each other.
　第１フレームロッド２３ａの先端と第１側壁２４ａとの間の距離は、第２フレームロッド２３ｂの先端と第１側壁２４ａとの間の距離よりも大きい。第２フレームロッド２３ｂの先端と第１側壁２４ａとの間の距離は、第３フレームロッド２３ｃと第１側壁２４ａとの間の距離よりも大きい。すなわち、第１フレームロッド２３ａの第１側壁２４ａから最も離れた位置にある部分が第２フレームロッド２３ｂの第１側壁２４ａから最も離れた位置にある部分よりも第１側壁２４ａから離れた位置にあり、第２フレームロッド２３ｂの第１側壁２４ａから最も離れた位置にある部分が第３フレームロッド２３ｃの第１側壁２４ａから最も離れた位置にある部分よりも第１側壁２４ａから離れた位置にあればよい。 距離 The distance between the tip of the first frame rod 23a and the first side wall 24a is larger than the distance between the tip of the second frame rod 23b and the first side wall 24a. The distance between the tip of the second frame rod 23b and the first side wall 24a is larger than the distance between the third frame rod 23c and the first side wall 24a. That is, the portion of the first frame rod 23a farthest from the first side wall 24a is located farther from the first side wall 24a than the portion of the second frame rod 23b farthest from the first side wall 24a. The portion of the second frame rod 23b farthest from the first side wall 24a is located farther from the first side wall 24a than the portion of the third frame rod 23c farthest from the first side wall 24a. I just need.
　第１フレームロッド２３ａの長さ、第２フレームロッド２３ｂの長さ及び第３フレームロッド２３ｃの長さは、互いに異なっていてもよい。より具体的には、第１フレームロッド２３ａは第２フレームロッド２３ｂよりも長くてもよく、第２フレームロッド２３ｂは第３フレームロッド２３ｃよりも長くてもよい。 の 長 The length of the first frame rod 23a, the length of the second frame rod 23b, and the length of the third frame rod 23c may be different from each other. More specifically, the first frame rod 23a may be longer than the second frame rod 23b, and the second frame rod 23b may be longer than the third frame rod 23c.
　第４フレームロッド２３ｄは、チャンバ２６に挿入されている。第４フレームロッド２３ｄの先端は、燃焼装置２０の内部に配置されており、第４フレームロッド２３ｄの他方端は、燃焼装置２０の外部に配置されている。第４フレームロッド２３ｄの他方端は、制御部５に電気的に接続されている。 ４The fourth frame rod 23d is inserted into the chamber 26. The tip of the fourth frame rod 23d is arranged inside the combustion device 20, and the other end of the fourth frame rod 23d is arranged outside the combustion device 20. The other end of the fourth frame rod 23d is electrically connected to the control unit 5.
　第４フレームロッド２３ｄの先端は、バーナ２１の下方に位置している。第４フレームロッド２３ｄの先端は、第１フレームロッド２３ａの先端、第２フレームロッド２３ｂの先端及び第３フレームロッド２３ｃの先端の上方に位置している（バーナ２１の下面に近い位置にある）。第４フレームロッド２３ｄの先端は、バーナ２１が第１出力状態、第２出力状態及び第３出力状態に制御されている場合に正常燃焼しているバーナ２１に形成されている火炎と接触する位置に配置されている。 先端 The tip of the fourth frame rod 23d is located below the burner 21. The tip of the fourth frame rod 23d is located above the tip of the first frame rod 23a, the tip of the second frame rod 23b, and the tip of the third frame rod 23c (close to the lower surface of the burner 21). . The tip of the fourth frame rod 23d is in contact with the flame formed on the burner 21 that is burning normally when the burner 21 is controlled to the first output state, the second output state, and the third output state. Are located in
　燃焼装置２０は、さらに、碍子部６ａと、碍子部６ｂとを有していてもよい。碍子部６ａ及び碍子部６ｂは、絶縁性の材料で構成されている。碍子部６ａ及び碍子部６ｂは、第１側壁２４ａに取り付けられている。より具体的には、碍子部６ａ及び碍子部６ｂは、胴パイプ２４ｅａと胴パイプ２４ｅｂとの部分の間にある第１側壁２４ａに設けられた貫通穴に挿入されている。 The combustion device 20 may further include an insulator 6a and an insulator 6b. The insulator portions 6a and 6b are made of an insulating material. The insulator portions 6a and 6b are attached to the first side wall 24a. More specifically, the insulator portions 6a and 6b are inserted into through holes provided in the first side wall 24a between the trunk pipes 24ea and 24eb.
　碍子部６ａは、第１貫通穴と、第２貫通穴とを有している。第１貫通穴及び第２貫通穴には、第１電極２２ａ及び第２電極２２ｂがそれぞれ挿入されている。碍子部６ｂは、第３貫通穴と、第４貫通穴と、第５貫通穴とを有している。第３貫通穴、第４貫通穴及び第５貫通穴には、第１フレームロッド２３ａ、第２フレームロッド２３ｂ及び第３フレームロッド２３ｃがそれぞれ挿入されている。 The insulator portion 6a has a first through hole and a second through hole. A first electrode 22a and a second electrode 22b are inserted into the first through hole and the second through hole, respectively. The insulator portion 6b has a third through hole, a fourth through hole, and a fifth through hole. A first frame rod 23a, a second frame rod 23b, and a third frame rod 23c are inserted into the third through hole, the fourth through hole, and the fifth through hole, respectively.
　第１フレームロッド２３ａ、第２フレームロッド２３ｂ及び第３フレームロッド２３ｃは、平面視において胴パイプ２４ｅａと重なる部分が碍子部６ｂで覆われるように、碍子部６ｂに挿入されている。点火プラグ２２（第１電極２２ａ及び第２電極２２ｂ）は、平面視において胴パイプ２４ｅａと重なる部分が碍子部６ａで覆われるように、碍子部６ａに挿入されている。 The first frame rod 23a, the second frame rod 23b, and the third frame rod 23c are inserted into the insulator 6b so that the portion overlapping the trunk pipe 24ea in plan view is covered with the insulator 6b. The spark plug 22 (the first electrode 22a and the second electrode 22b) is inserted into the insulator 6a such that a portion overlapping the trunk pipe 24ea in plan view is covered with the insulator 6a.
　＜第１実施形態に係る燃焼装置の動作＞
　以下に、第１実施形態に係る燃焼装置２０の動作を、図５、図６及び図７を参照しながら説明する。 <Operation of the combustion device according to the first embodiment>
Hereinafter, the operation of the combustion device 20 according to the first embodiment will be described with reference to FIGS. 5, 6, and 7. FIG.
　図５に示されるように、ファン２７、第１フレームロッド２３ａ、第２フレームロッド２３ｂ、第３フレームロッド２３ｃ及び第４フレームロッド２３ｄは、制御部５に接続されている。制御部５は、例えば、マイクロコントローラで構成されている。 フ ァ ン As shown in FIG. 5, the fan 27, the first frame rod 23a, the second frame rod 23b, the third frame rod 23c, and the fourth frame rod 23d are connected to the control unit 5. The control unit 5 is configured by, for example, a microcontroller.
　バーナ２１は、制御部５がファン２７を制御することにより、第１出力状態と、第２出力状態と、第３出力状態とに制御される。バーナ２１は、制御部５がファン２７を制御することにより、第１出力状態、第２出力状態及び第３出力状態とは異なる出力状態に制御されてもよい。 The burner 21 is controlled to a first output state, a second output state, and a third output state by the control unit 5 controlling the fan 27. The burner 21 may be controlled to an output state different from the first output state, the second output state, and the third output state by controlling the fan 27 by the control unit 5.
　図６に示されるように、バーナ２１が制御部５により第１出力状態に制御されている場合には、バーナ２１が正常燃焼していれば、第１フレームロッド２３ａ、第２フレームロッド２３ｂ及び第３フレームロッド２３ｃは、バーナ２１に形成されている火炎と接触しない。 As shown in FIG. 6, when the burner 21 is controlled to the first output state by the control unit 5, if the burner 21 is burning normally, the first frame rod 23a, the second frame rod 23b and The third frame rod 23c does not come into contact with the flame formed on the burner 21.
　バーナ２１が制御部５により第２出力状態に制御されている場合、バーナ２１が正常燃焼していれば、第１フレームロッド２３ａはバーナ２１に形成されている火炎と接触するが、第２フレームロッド２３ｂ及び第３フレームロッド２３ｃはバーナ２１に形成されている火炎と接触しない。 When the burner 21 is controlled to the second output state by the control unit 5, if the burner 21 is burning normally, the first frame rod 23a comes into contact with the flame formed in the burner 21, but the second frame The rod 23b and the third frame rod 23c do not come into contact with the flame formed on the burner 21.
　バーナ２１が制御部５により第３出力状態に制御されている場合、バーナ２１が正常燃焼していれば、第１フレームロッド２３ａ及び第２フレームロッド２３ｂはバーナ２１に形成されている火炎と接触するが、第３フレームロッド２３ｃはバーナ２１に形成されている火炎と接触しない。 When the burner 21 is controlled to the third output state by the control unit 5, if the burner 21 is burning normally, the first frame rod 23a and the second frame rod 23b come into contact with the flame formed in the burner 21. However, the third frame rod 23c does not come into contact with the flame formed on the burner 21.
　なお、図６中に図示されていないが、バーナ２１が正常燃焼していれば、第４フレームロッド２３ｄは、バーナ２１の出力状態に拠らず、バーナ２１に形成されている火炎に接触する。 Although not shown in FIG. 6, if the burner 21 is burning normally, the fourth frame rod 23d contacts the flame formed on the burner 21 regardless of the output state of the burner 21. .
　図７に示されるように、バーナ２１が制御部５により第１出力状態に制御されていたとしても、バーナ２１が異常燃焼している場合、バーナ２１に形成されている火炎と第１フレームロッド２３ａとが接触する。そのため、制御部５は、バーナ２１を第１出力状態となるように制御しており、かつ第１フレームロッド２３ａがバーナ２１に形成されている火炎と接触していることを検知した（すなわち、第１フレームロッド２３ａに流れる電流を検知した）場合に、バーナ２１が異常燃焼していると判断する。 As shown in FIG. 7, even if the burner 21 is controlled to the first output state by the control unit 5, if the burner 21 is abnormally burning, the flame formed on the burner 21 and the first flame rod 23a comes into contact. Therefore, the control unit 5 controls the burner 21 to be in the first output state, and detects that the first frame rod 23a is in contact with the flame formed on the burner 21 (that is, the controller 5 detects that the first frame rod 23a is in contact with the flame formed on the burner 21). When the current flowing through the first frame rod 23a is detected), it is determined that the burner 21 is abnormally burning.
　バーナ２１が制御部５により第２出力状態に制御されていたとしても、バーナ２１が異常燃焼している場合、バーナ２１に形成されている火炎と第１フレームロッド２３ａ及び第２フレームロッド２３ｂとが接触する。そのため、制御部５は、バーナ２１を第２出力状態となるように制御しており、かつ第１フレームロッド２３ａ及び第２フレームロッド２３ｂがバーナ２１に形成されている火炎と接触していることを検知した（すなわち、第１フレームロッド２３ａ及び第２フレームロッド２３ｂに流れる電流を検知した）場合、バーナ２１が異常燃焼していると判断する。 Even if the burner 21 is controlled to the second output state by the control unit 5, when the burner 21 is abnormally burning, the flame formed on the burner 21 and the first frame rod 23a and the second frame rod 23b Contact. Therefore, the control unit 5 controls the burner 21 to be in the second output state, and the first frame rod 23a and the second frame rod 23b are in contact with the flame formed on the burner 21. Is detected (that is, the current flowing through the first frame rod 23a and the second frame rod 23b is detected), it is determined that the burner 21 is abnormally burning.
　バーナ２１が制御部５により第３出力状態に制御されていたとしても、バーナ２１が異常燃焼している場合、バーナ２１に形成されている火炎と第１フレームロッド２３ａ～第３フレームロッド２３ｃとが接触する。そのため、制御部５は、バーナ２１を第３出力状態となるように制御しており、かつ第１フレームロッド２３ａ～第３フレームロッド２３ｃがバーナ２１に形成されている火炎と接触していることを検知した（すなわち、第１フレームロッド２３ａ～第３フレームロッド２３ｃに流れる電流を検知した）場合に、バーナ２１が異常燃焼していると判断する。 Even if the burner 21 is controlled to the third output state by the control unit 5, if the burner 21 is abnormally burning, the flame formed on the burner 21 and the first frame rod 23a to the third frame rod 23c Contact. Therefore, the control unit 5 controls the burner 21 to be in the third output state, and the first frame rod 23a to the third frame rod 23c are in contact with the flame formed in the burner 21. Is detected (that is, the current flowing through the first to third frame rods 23a to 23c is detected), it is determined that the burner 21 is abnormally burning.
　バーナ２１が異常燃焼している場合、バーナ２１に形成されている火炎の基部がバーナ２１の下面から離間し、第４フレームロッド２３ｄがバーナ２１に形成されている火炎との接触を検知することができなくなる場合がある。そのため、制御部５は、第４フレームロッド２３ｄがバーナ２１に形成されている火炎と接触していないことを検知した（第４フレームロッド２３ｄに電流が流れていないことを検知した）場合に、バーナ２１が異常燃焼していると判断する。 When the burner 21 is abnormally burning, the base of the flame formed on the burner 21 is separated from the lower surface of the burner 21, and the fourth frame rod 23d detects the contact with the flame formed on the burner 21. May not be possible. Therefore, when the control unit 5 detects that the fourth frame rod 23d is not in contact with the flame formed on the burner 21 (detects that no current is flowing through the fourth frame rod 23d), It is determined that the burner 21 is abnormally burning.
　＜第１実施形態に係る燃焼装置の効果＞
　以下に、第１実施形態に係る燃焼装置２０の効果を説明する。 <Effects of the combustion device according to the first embodiment>
Hereinafter, effects of the combustion device 20 according to the first embodiment will be described.
　上記のとおり、燃焼装置２０において、制御部５は、どのフレームロッドがバーナ２１に形成されている火炎と接触しているのかと、バーナ２１に対する制御状態（第１出力状態にあるか、第２制御状態にあるか）とを考慮して、バーナ２１が異常燃焼しているか否かを判断する。 As described above, in the combustion device 20, the control unit 5 determines which frame rod is in contact with the flame formed in the burner 21, and determines the control state of the burner 21 (the first output state or the second output state). It is determined whether or not the burner 21 is abnormally burning in consideration of whether the burner 21 is in a controlled state).
　そのため、燃焼装置２０においては、バーナ２１の出力が大きいためにバーナ２１に形成されている火炎が各フレームロッドと接触しているのか、バーナ２１が異常燃焼しているためにバーナ２１に形成されている火炎が各フレームロッドと接触しているのかを区別することができる。このように、燃焼装置２０によると、バーナ２１の出力が可変である場合であっても、バーナ２１の異常燃焼を検知することが可能となる。 Therefore, in the combustion device 20, whether the flame formed in the burner 21 is in contact with each frame rod because the output of the burner 21 is large, or formed in the burner 21 because the burner 21 is abnormally burning. It is possible to distinguish whether the flame is in contact with each flame rod. As described above, according to the combustion device 20, it is possible to detect abnormal combustion of the burner 21 even when the output of the burner 21 is variable.
　（第２実施形態）
　以下に、第２実施形態を説明する。なお、第１実施形態と異なる点を主に説明し、重複する説明は繰り返さない。 (2nd Embodiment)
Hereinafter, a second embodiment will be described. Note that points different from the first embodiment will be mainly described, and overlapping description will not be repeated.
　図８に示されるように、第２実施形態においては、第１フレームロッド２３ａの先端とバーナ２１との間の距離が第２フレームロッド２３ｂの先端とバーナ２１との間の距離よりも小さくなっており、第２フレームロッド２３ｂの先端とバーナ２１との間の距離が第３フレームロッド２３ｃとバーナ２１との間の距離よりも小さくなっている。すなわち、第１フレームロッド２３ａの第１側壁２４ａから最も離れた位置にある部分が第２フレームロッド２３ｂの第１側壁２４ａから最も離れた位置にある部分よりもバーナ２１に近い位置にあり、第２フレームロッド２３ｂの第１側壁２４ａから最も離れた位置にある部分が第３フレームロッド２３ｃの第１側壁２４ａから最も離れた位置にある部分よりもバーナ２１に近い位置にあればよい。 As shown in FIG. 8, in the second embodiment, the distance between the tip of the first frame rod 23a and the burner 21 is smaller than the distance between the tip of the second frame rod 23b and the burner 21. The distance between the tip of the second frame rod 23b and the burner 21 is smaller than the distance between the third frame rod 23c and the burner 21. That is, the portion of the first frame rod 23a farthest from the first side wall 24a is closer to the burner 21 than the portion of the second frame rod 23b farthest from the first side wall 24a. It is sufficient that the portion of the second frame rod 23b farthest from the first side wall 24a is closer to the burner 21 than the portion of the third frame rod 23c farthest from the first side wall 24a.
　なお、図９に示されるように、第１フレームロッド２３ａを途中で上方に向かって屈曲させることにより、第１フレームロッド２３ａの先端が第２フレームロッド２３ｂの先端よりもバーナ２１の下面に近くなるようにしてもよい。同様に、第３フレームロッド２３ｃを途中で下方に向かって屈曲させることにより、第２フレームロッド２３ｂの先端が第３フレームロッド２３ｃの先端よりもバーナ２１の下面に近くなるようにしてもよい。 As shown in FIG. 9, by bending the first frame rod 23a upward in the middle, the tip of the first frame rod 23a is closer to the lower surface of the burner 21 than the tip of the second frame rod 23b. You may make it become. Similarly, by bending the third frame rod 23c downward in the middle, the tip of the second frame rod 23b may be closer to the lower surface of the burner 21 than the tip of the third frame rod 23c.
　また、図８に示されるように、第２実施形態においては、第１フレームロッド２３ａと第１側壁２４ａとの間の距離、第２フレームロッド２３ｂと第１側壁２４ａとの間の距離及び第３フレームロッド２３ｃと第１側壁２４ａの距離は、互いに等しくてもよい。すなわち、第１フレームロッド２３ａの第１側壁２４ａから最も離れた位置にある部分、第２フレームロッド２３ｂの第１側壁２４ａから最も離れた位置にある部分及び第３フレームロッド２３ｃの第１側壁２４ａから離れた位置にある部分は、第１側壁２４ａからの距離が互いに等しくなっていればよい。なお、第１フレームロッド２３ａと第１側壁２４ａとの間の距離、第２フレームロッド２３ｂと第１側壁２４ａとの間の距離及び第３フレームロッド２３ｃと第１側壁２４ａの距離は、互いに異なっていてもよい。第２実施形態においては、第１フレームロッド２３ａの長さ、第２フレームロッド２３ｂの長さ及び第３フレームロッド２３ｃの長さは、互いに等しくてもよい。 As shown in FIG. 8, in the second embodiment, the distance between the first frame rod 23a and the first side wall 24a, the distance between the second frame rod 23b and the first side wall 24a, and The distance between the three frame rod 23c and the first side wall 24a may be equal to each other. That is, the portion of the first frame rod 23a farthest from the first side wall 24a, the portion of the second frame rod 23b farthest from the first side wall 24a, and the first side wall 24a of the third frame rod 23c. It is sufficient that the distance from the first side wall 24a is equal to the distance from the first side wall 24a. The distance between the first frame rod 23a and the first side wall 24a, the distance between the second frame rod 23b and the first side wall 24a, and the distance between the third frame rod 23c and the first side wall 24a are different from each other. May be. In the second embodiment, the length of the first frame rod 23a, the length of the second frame rod 23b, and the length of the third frame rod 23c may be equal to each other.
　その他の燃焼装置２０の構成に関しては、第１実施形態と第２実施形態とで共通しているため、詳細な説明は省略する。また、燃焼装置２０の動作に関しても、第１実施形態と第２実施形態とで共通しているため、詳細な説明は省略する。 Other configurations of the combustion device 20 are common to the first embodiment and the second embodiment, and thus detailed description is omitted. In addition, the operation of the combustion device 20 is common to the first embodiment and the second embodiment, and thus detailed description is omitted.
　第２実施形態においても、第１実施形態と同様に、制御部５は、どのフレームロッドがバーナ２１に形成されている火炎と接触しているのかとバーナ２１に対する制御状態（第１出力状態にあるか、第２制御状態にあるか）とを考慮して、バーナ２１が異常燃焼しているか否かを判断する。 Also in the second embodiment, similarly to the first embodiment, the control unit 5 determines which frame rod is in contact with the flame formed in the burner 21 and determines the control state for the burner 21 (the first output state). In the second control state), it is determined whether or not the burner 21 is abnormally burning.
　そのため、第２実施形態においても、バーナ２１の出力が大きいためにバーナ２１に形成されている火炎が各フレームロッドと接触しているのか、バーナ２１が異常燃焼しているためにバーナ２１に形成されている火炎が各フレームロッドと接触しているのかを区別することができる。 Therefore, also in the second embodiment, whether the flame formed on the burner 21 is in contact with each frame rod because the output of the burner 21 is large, or formed on the burner 21 because the burner 21 is abnormally burning. It is possible to distinguish whether the flame is in contact with each frame rod.
　以上のように本発明の実施形態について説明を行ったが、上述の実施形態を様々に変形することも可能である。また、本発明の範囲は、上述の実施形態に限定されるものではない。本発明の範囲は、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内での全ての変更を含むことが意図される。 Although the embodiment of the present invention has been described above, the above embodiment can be variously modified. Further, the scope of the present invention is not limited to the above embodiment. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　上記の実施形態は、燃焼装置及び温水装置に特に有利に適用される。 The above embodiment is particularly advantageously applied to a combustion device and a hot water device.
　５　制御部、６ａ　碍子部、６ｂ　碍子部、１０　筐体、２０　燃焼装置、２１　バーナ、２１ａ　炎孔、２２　点火プラグ、２２ａ　第１電極、２２ｂ　第２電極、２３ａ　第１フレームロッド、２３ｂ　第２フレームロッド、２３ｃ　第３フレームロッド、２３ｄ　第４フレームロッド、２４　一次熱交換器、２４ａ　第１側壁、２４ｂ　第２側壁、２４ｃ　第３側壁、２４ｄ　第４側壁、２４ｅａ，２４ｅｂ，２４ｅｃ，２４ｅｄ，２４ｅｅ　胴パイプ、２４ｆ，４０ａ，４０ｂ，４０ｃ，４０ｄ，４０ｅ，４０ｆ，４０ｇ　配管、２４ｇ　入水口、２４ｈ　出水口、２５　二次熱交換器、２６　チャンバ、２６ａ　吸入口、２７　ファン、２８　ダクト、２９　ベンチュリ、３０　オリフィス、３１　ガスバルブ、１００　温水装置、ＤＲ１　第１方向、ＤＲ２　第２方向、４１ａ，４１ｂ　バイパス配管、４２　バイパスサーボ。 5 controller, 6a insulator, 6b insulator, 10 casing, 20 burner, 21 burner, 21a flame hole, 22 spark plug, 22a first electrode, 22b second electrode, 23a first frame rod, 23b second Frame rod, 23c third frame rod, 23d fourth frame rod, 24 primary heat exchanger, 24a first side wall, 24b second side wall, 24c third side wall, 24d fourth side wall, 24ea, 24eb, 24ec, 24ed, 24ee Body pipe, 24f, 40a, 40b, 40c, 40d, 40e, 40f, 40g pipe, 24g water inlet, 24h water outlet, 25 secondary heat exchanger, 26 chamber, 26a inlet, 27 fan, 28 duct, 29 venturi , 30 orifice, 31 gas valve, 100 hot water , DR1 first direction, DR2 second direction, 41a, 41b bypass pipe, 42 bypass servo.

Claims (8)

  1. 　側壁を有する熱交換器と、
    　前記熱交換器に向かって火炎を形成するバーナと、
    　第１先端を有し、前記第１先端が前記熱交換器の内部に位置している第１フレームロッドと、
    　第２先端を有し、前記第２先端が前記熱交換器の内部に位置している第２フレームロッドと、
    　制御部とを備え、
    　前記バーナは、前記制御部により、第１出力状態と、前記第１出力状態よりも出力が大きい第２出力状態とに制御されるように構成されており、
    　前記第１先端は、前記バーナが前記第２出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触するが、前記バーナが前記第１出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触しない位置に配置されており、
    　前記第２先端は、前記バーナが前記第１出力状態及び前記第２出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触しない位置に配置されており、
    　前記第１先端と前記バーナとの距離及び前記第２先端と前記バーナとの距離は、互いに等しく、
    　前記第２先端と前記側壁との距離は、前記第１先端と前記側壁との距離よりも小さく、
    　前記制御部は、前記バーナが前記第１出力状態に制御されている状態で前記第１フレームロッドと前記バーナに形成されている火炎とが接触していることを検知した場合に前記バーナが異常燃焼していると判断するとともに、前記バーナが前記第２出力状態に制御されている状態で前記第２フレームロッドと前記バーナに形成されている火炎とが接触していることを検知した場合に前記バーナが異常燃焼していると判断するように構成されている、燃焼装置。     A heat exchanger having side walls;
    A burner forming a flame towards the heat exchanger;
    A first frame rod having a first tip, wherein the first tip is located inside the heat exchanger;
    A second frame rod having a second tip, wherein the second tip is located inside the heat exchanger;
    And a control unit,
    The burner is configured to be controlled by the control unit to a first output state and a second output state having an output larger than the first output state,
    When the burner is controlled to the second output state, the first tip contacts a flame formed in the burner that is burning normally, but the burner is controlled to the first output state. Is located at a position that does not come into contact with the flame formed on the burner that is burning normally when
    The second tip is disposed at a position where the burner is not in contact with a flame formed on the burner that is burning normally when the burner is controlled to the first output state and the second output state,
    The distance between the first tip and the burner and the distance between the second tip and the burner are equal to each other,
    The distance between the second tip and the side wall is smaller than the distance between the first tip and the side wall,
    The control unit detects an abnormality in the burner when detecting that the first frame rod is in contact with the flame formed in the burner in a state where the burner is controlled to the first output state. When it is determined that combustion is occurring, and when it is detected that the second frame rod is in contact with the flame formed on the burner while the burner is controlled to the second output state, A combustion device configured to determine that the burner is abnormally burning.
  2. 　第３先端を有し、前記第３先端が前記熱交換器の内部に位置している第３フレームロッドをさらに備え、
    　前記バーナは、前記制御部により、前記第１出力状態と、前記第２出力状態と、前記第２出力状態よりも出力が大きい第３出力状態とに制御されるように構成されており、
    　前記第１先端及び前記第２先端は、前記バーナが前記第３出力状態に制御されている場合に、正常燃焼している前記バーナに形成されている火炎と接触する位置に配置されており、
    　前記第３先端は、前記第１出力状態、前記第２出力状態及び前記第３出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触しない位置に配置されており、
    　前記第２先端と前記バーナとの距離及び前記第３先端と前記バーナとの距離は、互いに等しく、
    　前記第３先端と前記側壁との距離は、前記第２先端と前記側壁との距離よりも小さく、
    　前記制御部は、前記バーナが前記第３出力状態に制御されている状態で前記第３フレームロッドと前記バーナに形成されている火炎とが接触していることを検知した場合に、前記バーナが異常燃焼していると判断するように構成されている、請求項１に記載の燃焼装置。     A third frame rod having a third tip, wherein the third tip is located inside the heat exchanger;
    The burner is configured to be controlled by the control unit to the first output state, the second output state, and a third output state having an output larger than the second output state,
    The first tip and the second tip are arranged at positions where they come into contact with a flame formed in the burner that is burning normally when the burner is controlled to the third output state,
    The third tip is disposed at a position that does not come into contact with a flame formed in the burner that is burning normally when controlled to the first output state, the second output state, and the third output state. And
    The distance between the second tip and the burner and the distance between the third tip and the burner are equal to each other,
    The distance between the third tip and the side wall is smaller than the distance between the second tip and the side wall,
    When the control unit detects that the third frame rod is in contact with the flame formed on the burner in a state where the burner is controlled to the third output state, the burner is activated. The combustion device according to claim 1, configured to determine that abnormal combustion is occurring.
  3. 　前記第１フレームロッドの長さ、前記第２フレームロッドの長さ及び前記第３フレームロッドの長さは、互いに異なる、請求項２に記載の燃焼装置。 The combustion device according to claim 2, wherein a length of the first frame rod, a length of the second frame rod, and a length of the third frame rod are different from each other.
  4. 　側壁を有する熱交換器と、
    　前記熱交換器に向かって火炎を形成するバーナと、
    　第１先端を有し、前記第１先端が前記熱交換器の内部に位置している第１フレームロッドと、
    　第２先端を有し、前記第２先端が前記熱交換器の内部に位置している第２フレームロッドと、
    　制御部とを備え、
    　前記バーナは、前記制御部により、第１出力状態と、前記第１出力状態よりも出力が大きい第２出力状態とに制御されるように構成されており、
    　前記第１先端は、前記バーナが前記第２出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触するが、前記バーナが前記第１出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触しない位置に配置されており、
    　前記第２先端は、前記バーナが前記第１出力状態及び前記第２出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触しない位置に配置されており、
    　前記第１先端と前記バーナとの距離は、前記第２先端と前記バーナとの距離よりも小さく、
    　前記第１先端と前記側壁との距離及び前記第２先端と前記側壁との距離は、互いに等しく、
    　前記制御部は、前記バーナが前記第１出力状態に制御されている状態で前記第１フレームロッドと前記バーナに形成されている火炎とが接触していることを検知した場合に前記バーナが異常燃焼していると判断するとともに、前記バーナが前記第２出力状態に制御されている状態で前記第２フレームロッドと前記バーナに形成されている火炎とが接触していることを検知した場合に前記バーナが異常燃焼していると判断するように構成されている、燃焼装置。     A heat exchanger having side walls;
    A burner forming a flame towards the heat exchanger;
    A first frame rod having a first tip, wherein the first tip is located inside the heat exchanger;
    A second frame rod having a second tip, wherein the second tip is located inside the heat exchanger;
    And a control unit,
    The burner is configured to be controlled by the control unit to a first output state and a second output state having an output larger than the first output state,
    When the burner is controlled to the second output state, the first tip contacts a flame formed in the burner that is burning normally, but the burner is controlled to the first output state. Is located at a position that does not come into contact with the flame formed on the burner that is burning normally when
    The second tip is disposed at a position where the burner is not in contact with a flame formed on the burner that is burning normally when the burner is controlled to the first output state and the second output state,
    The distance between the first tip and the burner is smaller than the distance between the second tip and the burner,
    The distance between the first tip and the side wall and the distance between the second tip and the side wall are equal to each other,
    The control unit detects an abnormality in the burner when detecting that the first frame rod is in contact with the flame formed in the burner in a state where the burner is controlled to the first output state. When it is determined that combustion is occurring, and when it is detected that the second frame rod is in contact with the flame formed on the burner while the burner is controlled to the second output state, A combustion device configured to determine that the burner is abnormally burning.
  5. 　第３先端を有し、前記第３先端が前記熱交換器の内部に位置している第３フレームロッドをさらに備え、
    　前記バーナは、前記制御部により、前記第１出力状態と、前記第２出力状態と、前記第２出力状態よりも出力が大きい第３出力状態とに制御されるように構成されており、
    　前記第１先端及び前記第２先端は、前記バーナが前記第３出力状態に制御されている場合に、正常燃焼している前記バーナに形成されている火炎と接触する位置に配置されており、
    　前記第３先端は、前記第１出力状態、前記第２出力状態及び前記第３出力状態に制御されている場合に正常燃焼している前記バーナに形成されている火炎と接触しない位置に配置されており、
    　前記第２先端と前記バーナとの距離は、前記第３先端と前記バーナとの距離よりも小さく、
    　前記第３先端と前記側壁との距離及び前記第２先端と前記側壁との距離は、互いに等しく、
    　前記制御部は、前記バーナが前記第３出力状態に制御されている状態で前記第３フレームロッドと前記バーナに形成されている火炎とが接触していることを検知した場合に、前記バーナが異常燃焼していると判断するように構成されている、請求項４に記載の燃焼装置。     A third frame rod having a third tip, wherein the third tip is located inside the heat exchanger;
    The burner is configured to be controlled by the control unit to the first output state, the second output state, and a third output state having an output larger than the second output state,
    The first tip and the second tip are arranged at positions where they come into contact with a flame formed in the burner that is burning normally when the burner is controlled to the third output state,
    The third tip is disposed at a position that does not come into contact with a flame formed in the burner that is burning normally when controlled to the first output state, the second output state, and the third output state. And
    The distance between the second end and the burner is smaller than the distance between the third end and the burner,
    The distance between the third tip and the side wall and the distance between the second tip and the side wall are equal to each other,
    When the control unit detects that the third frame rod is in contact with the flame formed on the burner in a state where the burner is controlled to the third output state, the burner is activated. The combustion device according to claim 4, wherein the combustion device is configured to determine that abnormal combustion is occurring.
  6. 　前記第１フレームロッドの長さ、前記第２フレームロッドの長さ及び前記第３フレームロッドの長さは、互いに等しい、請求項５に記載の燃焼装置。 The combustion device according to claim 5, wherein the length of the first frame rod, the length of the second frame rod, and the length of the third frame rod are equal to each other.
  7. 　前記側壁に挿入された碍子部をさらに備え、
    　前記碍子部には、前記第１フレームロッド及び前記第２フレームロッドが挿入されている、請求項１～請求項６のいずれか１項に記載の燃焼装置。     Further comprising an insulator portion inserted into the side wall,
    The combustion device according to any one of claims 1 to 6, wherein the first frame rod and the second frame rod are inserted into the insulator portion.
  8. 　請求項１～請求項７のいずれか１項に記載の前記燃焼装置を備える、温水装置。 温 A hot water device comprising the combustion device according to any one of claims 1 to 7.
PCT/JP2019/030965 2018-09-26 2019-08-06 Combustion apparatus and water heater WO2020066310A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54130629U (en) * 1978-03-03 1979-09-11
JPH01106749U (en) * 1988-01-04 1989-07-18
JP2002267158A (en) * 2001-03-07 2002-09-18 Osaka Gas Co Ltd Hybrid catalytic combustion device and fan heater having it
JP2011133116A (en) * 2009-12-22 2011-07-07 Paloma Co Ltd Combustion device
JP2017219300A (en) * 2016-06-02 2017-12-14 リンナイ株式会社 Heat source machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54130629U (en) * 1978-03-03 1979-09-11
JPH01106749U (en) * 1988-01-04 1989-07-18
JP2002267158A (en) * 2001-03-07 2002-09-18 Osaka Gas Co Ltd Hybrid catalytic combustion device and fan heater having it
JP2011133116A (en) * 2009-12-22 2011-07-07 Paloma Co Ltd Combustion device
JP2017219300A (en) * 2016-06-02 2017-12-14 リンナイ株式会社 Heat source machine

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