JP4554506B2 - Fireplace heater - Google Patents

Description

  The present invention relates to a fireplace-type heater that includes an outer case and a combustion housing provided in the outer case, and that allows the inside of the combustion housing to be viewed from the front side of the outer case.

  Conventionally, as a heater of this type, a pseudo ridge formed of a refractory material such as ceramics is placed on a support plate disposed at the lower part of the combustion housing, and the support plate is opened below the support plate. A burner that burns gas fuel facing the opening is arranged, and when the burner is burned, the flame rises on the support plate through the opening, giving a visual impression as if a pseudo firewood is burning in the fireplace What was made is known (for example, refer patent document 1).

In the above-described conventional example, a plurality of torch-like burners are arranged below the support plate. However, in this case, it is felt that the pseudo soot is partially burned at a position where the burner matches the arrangement portion of the burner. Therefore, it is conceivable to adopt a horizontally long burner to form a horizontally long flame and give the impression that the pseudo soot is entirely burned. And by arranging such a longitudinal burner in the lateral direction in front of the dummy rod, the dummy rod and the flame can be effectively laid out to enhance the visual impression. Furthermore, in a burner that generates a flame in front of a dummy soot, a relatively large yellow flame can be formed by using only secondary air as combustion air during the combustion, such as a small blue flame caused by gas fuel. Eliminating the unnaturalness, it is possible to produce a good appearance of the burning of the pseudo soot.
Japanese Utility Model Publication 5-37129

  By the way, when only the secondary air is used as the combustion air for the burner, but a relatively large yellow flame can be formed, a yellow flame is formed from a position very close to the flame hole of the burner. In addition, contact of the yellow flame with the flame hole occurs, and soot adheres around the flame hole. And depending on the case, the soot around the flame hole may block the flame hole, causing clogging, and hindering good combustion.

  Also, the relatively large and horizontally long yellow flame formed by the horizontally long burner is easily affected by the flow velocity of the secondary air for combustion, which may cause unnatural fluctuations in the flame and reduce the visual impression. is there.

  In view of the above points, the present invention generates a yellow flame without sticking to the flame hole of the burner, and further suppresses an unnatural shaking of the yellow flame, thereby achieving good combustion and a visual impression of the burner. An object of the present invention is to provide a fireplace-type heater that can achieve both improvement.

  In order to achieve such an object, the present invention is an fireplace-type heater that includes an outer case and a combustion housing accommodated in the outer case, and allows the inside of the combustion housing to be viewed from the front side of the outer case. The support plate disposed at the lower part of the combustion housing, the pseudo soot placed on the support plate, and disposed below the support plate along the front side of the placement position of the pseudo soot and combusted by gas fuel It has a burner that is long in the horizontal direction, and a support plate is provided with a burner opening that exposes the flame hole at the top of the burner and a secondary air hole that opens around the burner opening. In the case where only the secondary air to be sent is used as combustion air for the burner, the secondary air hole is located above the support plate at the upper position where there is a gap from the flame hole of the burner so as to face at least a part of the front and rear sides A pair of secondary air guide plates for guiding secondary air from The features.

  In the present invention, only secondary air sent from the secondary air hole is used as combustion air for the burner. Thereby, the burner forms a relatively large horizontally long yellow flame. In the present invention, a pair of secondary air guide plates are provided to face the front and rear sides of the burner. Thereby, the secondary air from the secondary air hole formed in the support plate flows along the outer surface of the secondary air guide plate, and is guided to the upper position of the burner. At this time, since the secondary air guided by the secondary air guide plate is supplied to the upper position where the air gap exists from the flame hole of the burner, the yellow flame caused by the burner is formed at the position where the air gap exists from the flame hole. Is done. As described above, the yellow air flame can be formed at a position away from the flame hole of the burner by the secondary air guide plate, so that the contact of the yellow flame to the flame hole and its surroundings can be prevented. Therefore, even if a yellow flame is formed, no soot adheres to the flame hole and its surroundings, and the burner can be burned satisfactorily by reliably preventing the clogging of the flame hole. A large horizontal yellow flame can be formed to improve the visual impression.

  Here, the secondary air guide plate is superposed on the support plate and connected to the support plate, a communication hole formed in the connection portion and communicating with the secondary air hole of the support plate, It is preferable to include an ascending guide portion that raises the secondary air sent through the communication hole upward toward the flame hole of the burner.

  According to this, the secondary air that has reached the secondary air hole of the support plate flows on the support plate through the communication hole of the secondary air guide plate, and further rises along the rising guide portion of the secondary air guide plate. Then, it is smoothly supplied to the position above the flame hole. In addition, the secondary air guide plate can be adjusted by adjusting the size of the communication hole by providing a communication hole in the connecting portion. For example, even when the gas type of the fuel gas is changed. It is only necessary to replace the secondary air guide plate having a communication hole size suitable for the gas type to be changed.

  Further, in the present invention, the combustion housing is provided with an air supply duct for supplying secondary air to the lower side of the support plate, and the secondary air from the air supply duct is at one end of the burner in the longitudinal direction. When flowing from the rear side toward the burner, the secondary air flow rising from one end of the burner in the longitudinal direction and the secondary air hole located on the rear side to the burner from the secondary air hole It is preferable to provide a secondary air suppression plate for suppressing the secondary air guide plate on the other end side in the longitudinal direction of the burner.

  If the air supply duct is arranged to send secondary air from the rear side of one end in the longitudinal direction of the burner, the burner has a horizontally long shape, so that the secondary air is sent over its entire length. Thus, a large amount of secondary air from the air supply duct is supplied to a part of the burner. For this reason, the flame of the burner corresponding to the air supply duct shakes violently in response to the blow of secondary air from the air supply duct, and the appearance of burning yellow flame becomes unnatural and the visual impression is reduced. To do. Moreover, due to the intense shaking of the yellow flame, the yellow flame may come into contact with the flame hole and the soot may adhere.

  Therefore, the present invention suppresses the flow rate of the secondary air to the rear side of one end portion in the longitudinal direction of the burner, which is a portion corresponding to the air supply duct, by providing the secondary air suppression plate. As a result, the shake of the yellow flame formed at one end in the longitudinal direction of the burner corresponding to the air supply duct can be suppressed, and the visual impression is improved by producing a naturally burning yellow flame. Can do. In addition, it is possible to prevent the soot from adhering around the flame hole by suppressing the shaking of the yellow flame.

  In addition, the yellow flame formed by the secondary air guide plate provided at the other end portion in the longitudinal direction of the burner is also affected by the flow rate of the secondary air that spreads from the one end portion in the longitudinal direction of the burner. Can suppress the unnatural shaking of the yellow flame, can enhance the natural visual impression of the yellow flame, and at the same time can reliably prevent the sticking of soot around the flame hole .

  An embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a fireplace-type heater according to the present embodiment, FIG. 2 is a front view of the heater according to the present embodiment with the front panel removed, and FIG. 3 is a sectional view taken along the line III-III in FIG. 4 is an explanatory sectional plan view of the combustion housing, FIG. 5 is a sectional view taken along the line VV of FIG. 4, and FIG. 6 is a sectional view taken along the line VI-VI of FIG.

  The heater of the present embodiment shown in FIG. 1 is a wall-embedded fireplace type heater. As shown in FIGS. 1 to 3, the heater includes an outer case 1 and a combustion housing 2 provided in the outer case 1. A detachable front panel 3 is provided on the front surface of the outer case 1. Further, as shown in FIG. 3, the outer case 1 is disposed so as to be embedded in a recess Wa formed in the chamber wall W, and only the front portion of the outer case 1 is exposed in front of the chamber wall W. Become.

  The combustion housing 2 is provided with a detachable front door 4 on the front surface thereof. A glass plate 5 is attached to the front door 4, and a window portion 7 with a window glass 6 that faces the glass plate 5 is opened on the front panel 3 of the outer case 1. The inside is visible. In addition, the combustion enclosure 2 is provided with a simulated firewood 8, a front burner 9, and a rear burner 10 which will be described later. When both the burners 9 and 10 are burned, the simulated firewood 8 burns in the fireplace. It is possible to give a visual impression as if you are.

  As shown in FIG. 3, the combustion exhaust in the combustion housing 2 includes a heat exchanger 11 disposed on the rear side of the combustion housing 2 and an exhaust duct connected to the downstream side of the heat exchanger 11 via an exhaust fan 12. 13 and is forcibly discharged to the outdoors. An air supply duct 14 is connected to the bottom of the combustion housing 2, and outdoor air is forcibly supplied into the combustion housing 2 through the air supply duct 14 by the suction force of the exhaust fan 12. Note that the exhaust duct 13 is disposed on the left outer side of the combustion casing 2, and in order to prevent the radiant heat from the exhaust duct 13 from reaching the front panel 3, as shown in FIG. 2 is formed so as to protrude to the left side. The air supply duct 14 is disposed on the lower right side of the combustion housing 2.

  In the outer case 1, a hot air fan 15 is disposed above the combustion housing 2. And while opening the air intake port 17 in the front edge part of each side plate part 16 of the right and left of the outer case 1, as shown in FIG.1 and FIG.3, it sends air to the lower part of the window part 7 of the front panel 3. FIG. The opening 18 is opened, the room air is sucked into the warm air fan 15 through the air intake port 17, and the air blowing port 18 passes from the warm air fan 15 through the arrangement portion of the heat exchanger 11 and the space below the combustion housing 2. To obtain a warm air heating function.

  Further, as shown in FIG. 2, an electronic control unit 19 and a valve unit 20 for supplying burner fuel gas are arranged in the right side space between the combustion casing 2 in the outer case 1. ing. The electronic control unit 19 and the valve unit 20 are cooled by the room air flowing in from the right air intake port 17. A partition plate 21 is provided on the outer sides of the left and right sides of the combustion housing 2 so as to reach the bottom surface and the back surface of the outer case 1, and partitions the air blown from the hot air fan 15 from escaping in the lateral direction. The plate 21 can prevent it. Further, as shown in FIG. 3, a guide plate 22 that guides the air that has passed through the placement portion of the heat exchanger 11 to the blower opening 18 is disposed below the combustion housing 2.

  As shown in FIG. 4, a support plate 24 is disposed at the lower part of the combustion housing 2 so as to straddle a pair of brackets 23 fixed to the inner surfaces of the left and right sides of the combustion housing 2. On top, as shown in FIG. 3, a dummy rod 8 made of a refractory material such as ceramics is placed. Further, as shown in FIGS. 3 and 4, the lower side of the support plate 24 is positioned in the laterally long front burner 9 and the rear side of the front burner burner 9, and the laterally long pair of left and right. The rear burner 10 is arranged. As shown in FIG. 4, the support plate 24 is fitted with the upper end portion of the front burner 9 so that the flame hole 25 of the front burner 9 is exposed along the front side of the dummy rod 8. A pair of left and right rear burner openings 28 are formed to fit the upper ends of the left and right rear burners 10 so as to expose the flame holes 27 of the rear burners 10 along the lower side of the pseudo rod 8.

  As a result, the wobbling of the burners 9 and 10 is prevented, and the gas ejected from the upper ends of the burners 9 and 10 burns on the support plate 24, so that the pseudo soot 8 on the support plate 24 burns as a whole. Can give the impression that In particular, with respect to the front burner 9, as shown in FIG. 1, by forming a flame along the front side of the pseudo soot 8, a natural appearance in which the pseudo soot 8 is burning can be produced. Further, each of the burners 9 and 10 employs a structure that burns only with secondary air as combustion air. As a result, in particular, a relatively large yellow flame is visually recognized at the front burner 9 located in front of the dummy firewood 8, and the natural flame condition of the fireplace is effectively suppressed by suppressing the generation of the blue flame accompanying the combustion by the gas fuel. Directing.

  Also, as shown in FIG. 4, an ignition burner 29 and a spark plug 30 are disposed between the front burner 9 and the left and right rear burners 10 so as to penetrate the support plate 24 and protrude above the support plate 24. ing. The spark burner 29 is ignited by the spark discharge of the spark plug 30, and the ignition burner 29 is ignited by the front burner 9 and the left and right rear burners 10, 10. In FIG. 4, reference numeral 31 denotes a flame detection element composed of a frame rod for the ignition burner 29.

  In the support plate 24, a plurality of front burner secondary air holes 32 are formed around the front burner opening 26, and a plurality of rear burner secondary air holes 33 are formed around the rear burner opening 28. Further, a plurality of mounting holes 34 are formed at the left and right side edges of the support plate 24, and the support plate 24 is screwed to the bracket 23 in these mounting holes 34. In addition, what is indicated by reference numerals 35 and 36 in the figure is a flame detection element composed of a frame rod attached to the side wall of the combustion housing 2 so as to face directly above the front burner 9 and the left and right rear burners 10, respectively.

  Incidentally, in the present embodiment, as shown in FIG. 4, a pair of secondary air guide plates 37 facing each other through the front burner 9 is provided on the left end side of the front burner 9. As shown in FIG. 5, the secondary air guide plate 37 includes a connection portion 38 that is superimposed on the support plate 24 and connected (screwed) to the support plate 24, and the connection portion 38 includes the connection plate 38. A communication hole 39 communicating with the front burner secondary air hole 32 is formed. A rising guide portion 40 that lifts and guides secondary air from the communication hole 39 is formed on one side edge of the connecting portion 38 on the front burner 9 side.

  The flame hole plate 41 provided at the upper end of the front burner 9 is disposed substantially flush with the support plate 24, and the ascending guide portions 40 of the secondary air guide plates 37 are directed toward the upper side of the flame hole plate 41. It extends upward while inclining in the approaching direction. A plurality of flame holes 25 are formed in the flame hole plate 41 of the front burner 9, and the secondary air guided by the ascending guide portion 40 of the secondary air guide plate 37 has a gap above the flame hole 25. Supplied. Thereby, in the position where the secondary air guide plate 37 of the front burner 9 is provided, a flame (yellow flame Fa) is formed from the vicinity of the upper edge of the secondary air guide plate 37. When the front burner 9 is burned using only secondary air as combustion air, a relatively large yellow flame Fa can be formed to give a good visual impression as a fireplace. This yellow flame Fa is used as a front burner. 9, the flame hole plate 41 and the yellow flame Fa are not in contact with each other, and soot adheres to the flame hole plate 41 or the flame hole 25 is clogged by the soot. Can be reliably prevented.

  Moreover, by providing the secondary air guide plate 37 with the communication hole 39, the amount of secondary air can be adjusted by the size of the communication hole 39. That is, for example, when the secondary air amount needs to be increased or decreased when the fuel gas type is changed, the support plate 24 is replaced to change the size of the secondary air hole 32 for the front burner. Therefore, it is only necessary to replace the secondary air guide plate 37 having the size of the communication hole 39 corresponding to the gas type to be changed, so that the work efficiency is high and the cost is low.

  In the present embodiment, as shown in FIG. 4, a secondary air suppression plate 42 is provided on the right end side of the front burner 9 along the rear side of the front burner 9. As shown in FIG. 6, the secondary air suppression plate 42 includes a connection portion 43 connected (screwed) on the support plate 24, and a support plate is provided on one side edge of the connection portion 43 on the front burner 9 side. A restraint wall portion 44 is formed to stand on 24. Similar to the secondary air guide plate 37, the connection portion 43 has a communication hole 45 that communicates with the secondary air hole 32 of the support plate 24.

  As shown in FIG. 2, the air supply duct 14 is disposed on the lower right side of the combustion housing 2, and as shown in FIG. 6, secondary air is sent from the rear side of the front burner 9. The secondary air suppression plate 42 is provided on the rear side of the front burner 9 corresponding to the position of the air supply duct 14.

  The secondary air supplied from the air supply duct 14 to the front burner 9 has a flow velocity toward the front burner 9 from the secondary air hole 32 for the front burner of the support plate 24 at a position corresponding to the air supply duct 14. This is larger than the flow velocity from the burner secondary air hole 32. For this reason, the yellow flame Fb formed on the right end side of the front burner 9 at a position corresponding to the air supply duct 14 sways violently under the influence of the fast secondary air flow, resulting in a visually unnatural state. Therefore, in the present embodiment, the secondary air suppression plate 42 is provided at a position where the flow velocity of the secondary air is the largest, and the suppression wall portion 44 is interposed between the secondary air hole 32 for the front burner and the front burner 9. Is arranged. For this reason, the secondary air from the secondary air hole 32 for the front burner strikes the suppression wall 44 through the communication hole 45, and the flow rate of the secondary air is moderately suppressed toward the front burner 9. Thereby, the unnatural shaking of the yellow flame Fb formed in the right end part side of the front burner 9 is suppressed, and a favorable visual impression can be given as a fireplace.

  As mentioned above, although embodiment which applied this invention to the wall-embedded type fireplace type heater was described, this invention is applicable to a floor-standing type fireplace type heater similarly.

The perspective view of the fireplace type heater of one Embodiment of this invention. The explanatory front view of the state where the front panel of the heater of this embodiment was removed. III-III sectional view explanatory drawing of FIG. Explanatory cutting plan view of a combustion housing. VV sectional view explanatory drawing of FIG. VI-VI line cross-section explanatory drawing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Outer case, 2 ... Combustion housing, 8 ... Simulated soot, 9 ... Front burner (burner), 14 ... Air supply duct, 24 ... Support plate, 25 ... Flame hole, 26 ... Front burner opening (burner opening) 32 ... secondary air holes (secondary air holes) for the front burner, 37 ... secondary air guide plate, 38 ... connecting portion, 39 ... communication hole, 40 ... rising guide portion, 42 ... secondary air suppressing plate.

Claims (3)

A fireplace-type heater that includes an outer case and a combustion housing accommodated in the outer case, and allows the inside of the combustion housing to be viewed from the front side of the outer case, and a support plate disposed at the lower part of the combustion housing; A support plate comprising: a dummy rod placed on the support plate; and a transversely long burner that is disposed below the support plate along the front side of the placement position of the dummy rod and burns with gas fuel. In addition, a burner opening that exposes the flame hole at the top of the burner and a secondary air hole that opens around the burner opening are opened, and only the secondary air sent from the secondary air hole is used as combustion air for the burner. In what is used as
A pair of secondary air guide plates for guiding the secondary air from the secondary air holes are provided on the support plate at an upper position facing the front and rear sides of at least a part of the burner and from the flame holes of the burner. A fireplace-type heater characterized by that.   The secondary air guide plate includes a connecting portion that is superimposed on the support plate and connected to the support plate, a communication hole that is formed in the connection portion and communicates with the secondary air hole of the support plate, and a communication hole. The fireplace-type heater according to claim 1, further comprising an ascending guide portion that raises the secondary air sent through the burner toward an upper side of the flame hole of the burner. The combustion casing is provided with an air supply duct for supplying secondary air to the lower side of the support plate, and the secondary air from the air supply duct is directed toward the burner from the rear side at one end in the longitudinal direction of the burner. When flowing
A secondary air suppression plate is provided that suppresses the secondary air flow from the secondary air hole toward the burner by standing between the longitudinal end of the burner and the secondary air hole located on the rear side thereof, The fireplace-type heater according to claim 1 or 2, wherein a secondary air guide plate is provided on the other end side in the longitudinal direction of the burner.

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