JP6171716B2 - Combustion heater - Google Patents

Description

  The present invention relates to a combustion heater that heats an object to be fired by burning fuel gas.

  Conventionally, a combustion heater that heats a heating plate with combustion heat generated by burning fuel gas and heats industrial materials or foods with radiant heat from a radiant surface of the heating plate is widely used (for example, Patent Document 1).

  In such a combustion heater, the exhaust flow path and the combustion chamber from which the exhaust gas is discharged have a heating plate as a side wall, and the heat of the exhaust gas and the combustion heat in the combustion chamber are easily transferred to the heating plate. Yes.

JP 2010-196994 A

  As described above, radiant heat is transferred to the object to be fired by heating the heating plate of the combustion heater. At this time, the temperature distribution on the radiation surface of the heating plate is biased due to the influence of the distance from the combustion chamber and the exhaust passage. Therefore, it is desirable to adjust the position where the temperature is high and the position where the temperature is low on the radiation surface of the heating plate according to the type of the object to be fired.

  However, as in the configuration described in Patent Document 1 described above, in the conventional combustion heater, the positions of the combustion chamber and the exhaust passage are fixed with respect to the heating plate, and the temperature distribution of the heating plate is changed. It was not easy. For this reason, heat loss may be increased in heating the object to be fired.

  Further, in the conventional combustion heater, the outer wall member that covers the combustion chamber, the exhaust passage, and the like is fixed to the heating plate, and when one or both of the heating plate and the outer wall member are thermally expanded, Thermal stress is generated at the contact portion with the outer wall member. Therefore, there is a demand for development of a structure that suppresses thermal fatigue due to thermal stress and improves durability.

  In view of such problems, the present invention provides a combustion heater that can easily change the temperature distribution of the radiation surface, efficiently heat the object to be fired, and improve durability. It is an object.

  In order to solve the above problems, a combustion heater according to the present invention is disposed in contact with a heating plate having a radiation surface, a heating surface opposite to the radiation surface of the heating plate, and the heating surface of the heating plate. Combustion chamber for burning fuel gas as part of the side wall, one or a plurality of combustion units in which an exhaust passage for discharging exhaust gas from the combustion chamber is formed, and a pressing portion for pressing the combustion unit against the heating plate The combustion unit is characterized in that it can be arranged in the surface direction of the heating surface within the range of the heating surface of the heating plate.

  The combustion unit is located on the outer circumferential side of the arrangement plate, the arrangement plate arranged opposite to the heating plate, the partition plate arranged between the heating plate and the arrangement plate, and the heating plate and the arrangement plate along the outer circumference of the arrangement plate. An outer peripheral portion extending in the facing direction; and an introduction channel that guides the fuel gas continuously to the combustion chamber, with the arrangement plate and the partition plate as side walls, the combustion chamber comprising the heating plate and the outer periphery The exhaust passage may be formed with the heating plate and the partition plate as side walls, and the fuel gas may be preheated with the heat of the exhaust gas through the partition plate.

  A first piping section connected to the combustion unit for introducing fuel gas into the combustion unit; and a second piping section connected to the combustion unit for discharging exhaust gas from the combustion unit, wherein the first piping section and the second piping. The part may be formed with a variable part that is bent in accordance with the arrangement of the combustion unit.

  One or more pipes selected in accordance with the arrangement of the combustion unit are connected, connected to the combustion unit, and a first pipe part for introducing fuel gas into the combustion unit, and selected in accordance with the arrangement of the combustion unit And a second piping part connected to the combustion unit and exhausting exhaust gas from the combustion unit, wherein the first piping part and the second piping part function as a pressing part. May be.

  According to the present invention, it is possible to easily change the temperature distribution on the radiation surface, efficiently heat the object to be fired, and improve the durability.

It is the external appearance perspective view which showed the external appearance example of the combustion heater. It is explanatory drawing for demonstrating a combustion heater. It is explanatory drawing for demonstrating a projection part. It is explanatory drawing for demonstrating a 1st modification. It is explanatory drawing for demonstrating a 2nd modification. It is explanatory drawing for demonstrating a 3rd modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is an external perspective view showing an external appearance example of the combustion heater 100. The combustion heater 100 in the present embodiment is used in a continuous heating furnace that heats an object to be baked such as an industrial material or food while transporting it, and a batch furnace that heats it while it is not transported. Further, the combustion heater 100 is a premixed type in which city gas or the like and air as a combustion oxidant gas are mixed before being supplied to the main body container. It may be a diffusion type that performs combustion.

  As shown in FIG. 1, the combustion heater 100 is configured by connecting a plurality of (in this case, three) combustion units 104 to one heating plate 102. Each combustion unit 104 is supplied with a fuel gas in which city gas and air are premixed and burns the fuel gas. The heating plate 102 is heated by the combustion heat. When the object to be fired is disposed on the radiation surface 102a side of the heating plate 102, the object to be fired is heated by the radiation heat from the radiation surface 102a.

  As described above, each combustion heater 100 is provided with three combustion units 104. Since all the combustion units 104 have the same configuration, only one combustion unit 104 will be described below.

  FIG. 2 is an explanatory diagram for explaining the combustion heater 100. FIG. 2A shows a cross section taken along line II (a) -II (a) of FIG. 1, and FIG. The enlarged view of the dashed-dotted line part of Fig.2 (a) is shown. As shown in FIG. 2, the combustion heater 100 includes a heating plate 102, a combustion unit 104, a first piping part 106, a second piping part 108, a support part 110, and a pressing part 112. Is done.

  The heating plate 102 is a thin plate member formed of a material having high heat resistance and oxidation resistance, for example, stainless steel (SUS: Stainless Used Steel), or a material having high thermal conductivity, for example, brass. The radiation surface 102a of the heating plate 102 is formed in a substantially rectangular shape (see FIG. 1), is heated by the combustion heat generated by the combustion, and transfers the radiation heat to the object to be fired.

  The combustion unit 104 is disposed in contact with a heating surface 102b which is a surface of the heating plate 102 opposite to the radiation surface 102a.

  The first piping unit 106 is a piping through which fuel gas flows, and the second piping unit 108 is a piping through which exhaust gas flows. The second piping unit 108 is disposed inside the first piping unit 106. That is, the 1st piping part 106 and the 2nd piping part 108 form a double pipe.

  The first piping unit 106 is connected to the combustion unit 104 and introduces fuel gas into the combustion unit 104. The second piping unit 108 is connected to the combustion unit 104 and discharges exhaust gas from the combustion unit 104.

  Further, variable portions 106 a and 108 a are formed in the first piping portion 106 and the second piping portion 108. The variable portions 106 a and 108 a are configured by, for example, a flexible tube having a bellows structure, and are bent according to the arrangement of the combustion unit 104.

  The combustion unit 104 also includes an arrangement plate 114, a partition plate 116, a heat insulating part 118, a combustion chamber 120, a sealing part 122, a heat insulating material 124, an introduction flow path 126, and an exhaust flow path 128. Consists of.

  The arrangement plate 114 is a flat plate member made of a material having high heat resistance and oxidation resistance, such as stainless steel or a material having low thermal conductivity. The arrangement plate 114 is arranged to face the heating plate 102 substantially in parallel.

  Like the heating plate 102, the partition plate 116 is a thin plate member formed of a material having high heat resistance and oxidation resistance, such as stainless steel, or a material having high thermal conductivity, such as brass. The partition plate 116 is disposed between the heating surface 102 b of the heating plate 102 and the arrangement plate 114 so as to face the arrangement plate 114 substantially in parallel.

  The arrangement plate 114 and the partition plate 116 have substantially equal outer peripheries (outer shapes) of opposing surfaces, and each has a track shape (a shape in which the two short sides of the rectangle are changed to line-symmetrical arcs (semicircles)). I am doing.

  The heating plate 102, the arrangement plate 114, and the partition plate 116 may be disposed to face each other as long as a gap is formed therebetween. In addition, the heating plate 102, the arrangement plate 114, and the partition plate 116 are not limited in thickness, and may be formed in irregularities without being limited to flat plates.

  The heat insulating portion 118 is a thin plate member formed of a material having high heat insulating properties (having heat insulating properties), for example, ceramic. The heat insulating portion 118 includes an outer peripheral portion 118a and a facing portion 118b.

  The outer peripheral portion 118a is located on the outer peripheral side of the arrangement plate 114, and extends in the facing direction of the heating plate 102 and the arrangement plate 114 (the vertical direction in FIG. 2A) along the outer periphery of the arrangement plate 114. The facing portion 118b is a portion that is bent and continuous from a portion of the outer peripheral portion 118a on the arrangement plate 114 side (the upper side in FIG. 2A), and extends toward the center of the arrangement plate 114. 102 and oppositely arranged.

  The heat insulating portion 118 forms a hole with the opposing portion 118b as the bottom surface and the inner surface of the outer peripheral portion 118a as the side surface, and the contour of this hole is similar to the outer shape of the arrangement plate 114 and the partition plate 116. I am doing. The outer peripheral portion 118a is separated from the outer peripheral surface 114a of the arrangement plate 114 and the outer peripheral surface 116a of the partition plate 116 while maintaining a constant interval.

  As shown in FIG. 2B, the combustion chamber 120 is located between the outer peripheral portion 118a and the outer peripheral surfaces 114a and 116a of the arrangement plate 114 and the partition plate 116, and faces the outer peripheral surfaces 114a and 116a. That is, the combustion chamber 120 is surrounded by the outer peripheral surfaces 114a and 116a, the heating plate 102, and the heat insulating portion 118 (the outer peripheral portion 118a), and is a space inside the outer peripheral portion 118a formed along the outer peripheral portion 118a. .

  The sealing part 122 can be made of a thin plate member made of a material having a lower heat insulating property than the heat insulating part 118, such as stainless steel. In addition, a heat-resistant seal paste P is applied to the heating surface 102b at the contact portion with the sealing portion 122.

  On the other hand, the heat insulating portion 118 is not joined to any constituent member that comes into contact, and the outer peripheral portion 118a and the facing portion 118b of the heat insulating portion 118 are covered and supported by the sealing portion 122 from the opposite side of the combustion chamber 120. ing. Further, the heat insulating part 118 is regulated by the arrangement plate 114 and the sealing part 122 so that there is no relative displacement from the sealing part 122.

  A heat insulating material 124 such as rock wool having heat insulating properties is sealed in a space between the sealing portion 122 and the heat insulating portion 118 and a space between the sealing portion 122 and the arrangement plate 114.

  Through holes 114b, 118c, and 122a are provided in the placement plate 114, the heat insulating portion 118, and the sealing portion 122, respectively. The through holes 114b, 118c, and 122a are in a positional relationship facing each other, and the first piping portion 106 is inserted therethrough. The end of the first piping part 106 is joined to the inner wall of the through hole 114 b of the arrangement plate 114. Further, the first piping part 106 is joined to the inner wall of the through hole 122a of the sealing part 122.

  Further, the partition plate 116 is provided with an exhaust hole 116b having an inner diameter smaller than that of the through hole 114b at a position facing the through hole 114b of the arrangement plate 114. The second piping part 108 is inserted through the exhaust hole 116b, and the end of the second piping part 108 is joined to the inner wall of the exhaust hole 116b.

  The end of the second piping part 108 protrudes to the radiation surface 102 a side from the end of the first piping part 106 and is separated from the heating plate 102, and the partition plate 116 is the end of the second piping part 108. By being fixed to the part, the heating plate 102 and the arrangement plate 114 are separated from each other while maintaining a constant interval.

  The introduction channel 126 is a channel formed by a gap between the arrangement plate 114 and the partition plate 116 and having the arrangement plate 114 and the partition plate 116 as side walls. The introduction channel 126 communicates with the first piping unit 106 and guides the fuel gas flowing in from the first piping unit 106 (the through hole 114 b of the arrangement plate 114) radially toward the combustion chamber 120.

  Further, as shown in FIG. 2 (b), a protrusion 116 c that protrudes from the outer peripheral end of the partition plate 116 toward the arrangement plate 114 is formed on the outlet side (combustion chamber 120 side) of the introduction passage 126. Is provided.

  FIG. 3 is an explanatory diagram for explaining the protrusion 116 c, and shows a perspective view of the combustion chamber 120 and a cross-sectional view of the components surrounding the combustion chamber 120. Here, for the sake of easy understanding, the heating plate 102 is removed, the direction shown in FIGS. 1 and 2 is shown in the inverted direction, and the outline of the hidden portion of the partition plate 116 is indicated by a broken line. It shows with.

  As shown in FIG. 3, a plurality of protrusions 116c are provided at regular intervals in the circumferential direction of the partition plate 116, and a flow path 116d is formed between adjacent protrusions 116c. As a result, the introduction channel 126 and the combustion chamber 120 communicate with each other through the channel 116d in which the cross-sectional area of the communication portion is narrowed. At this time, since the interval between the adjacent protrusions 116c, that is, the width of the flow path 116d is designed to be equal to or less than the extinguishing distance, stable combustion is possible in the combustion chamber 120.

  The fuel gas flowing into the combustion chamber 120 from the flow path 116d collides with the outer peripheral portion 118a in the combustion chamber 120 and temporarily stays as shown in FIG. 2 (b). The combustion chamber 120 is provided with an ignition device (not shown). When the ignition device ignites the fuel gas introduced from the introduction passage 126, the combustion continues in the combustion chamber 120, and the exhaust gas generated by the combustion is generated. Is guided to the exhaust flow path 128.

  As shown in FIG. 2B, the exhaust flow path 128 is a flow path formed by a gap between the heating plate 102 and the partition plate 116 with the heating plate 102 and the partition plate 116 as side walls. The exhaust passage 128 is continuous with the combustion chamber 120 and communicates with the second piping unit 108, and exhaust gas generated by the combustion in the combustion chamber 120 is concentrated from the combustion chamber 120 toward the center side in the plane direction, It guide | induces out of the combustion unit 104 through 2 piping parts 108. FIG.

  The heating plate 102 is heated from the heating surface 102 b by the combustion heat in the combustion chamber 120 and the heat of the exhaust gas flowing through the combustion chamber 120 and the exhaust passage 128. Then, the object to be fired is heated by the radiation heat from the radiation surface 102a.

  Further, the partition plate 116 is formed of a material that is relatively easy to conduct heat, and the exhaust gas flowing through the exhaust passage 128 transfers heat to the fuel gas flowing through the introduction passage 126 via the partition plate 116. Here, since the exhaust gas flowing through the exhaust flow path 128 and the fuel gas flowing through the introduction flow path 126 are opposed to each other (counter flow) across the partition plate 116, the fuel gas is efficiently used by the heat of the exhaust gas. Therefore, it is possible to preheat and to obtain high thermal efficiency.

  Further, the exhaust gas flowing through the second piping section 108 shown in FIG. 2 (a) flows through the first piping section 106 through the second piping section 108, transfers heat to the counterflow fuel gas, and preheats it. By so-called excess enthalpy combustion, in which fuel gas is preheated in this way, combustion of fuel gas can be stabilized and the concentration of CO (carbon monoxide) generated by incomplete combustion can be suppressed to an extremely low concentration. .

  The support part 110 fixedly supports the heating plate 102. Specifically, the support part 110 is comprised by the rod member 110a in which the thread groove was formed, and the nut 110b, for example. One end 110c of the bar member 110a is fixed to a wall W such as a ceiling. The other end 110d side of the rod member 110a is inserted through a hole provided in the heating plate 102, and the two nuts 110b screwed to the rod member 110a sandwich the heating plate 102 so that the heating plate 102 is Fixed.

  The pressing portion 112 is made of, for example, an elastic member such as a spring, and one end thereof is fixed to a pedestal 112 a provided on the wall W. The pedestal 112a is not fixed to the wall W, and is pressed against the lower surface of the wall W by receiving an urging force (elastic force) from the contracted pressing portion 112 from below. Further, the other end of the pressing portion 112 is fixed to one end of the cover portion 112b. The cover portion 112b is a cylindrical member having a hollow inside, and is closed at one end and opened at the other end.

  The other end of the cover portion 112b is fixed to a portion of the first piping portion 106 that protrudes in a direction perpendicular to the heating surface 102b. The 2nd piping part 108 passes through the inside of the cover part 112b, and extends outside the cover part 112b from the hole formed in the cover part 112b side surface.

  The pressing portion 112 presses the cover portion 112 b toward the radiation surface 102 a, and the entire combustion unit 104 is pressed against the heating plate 102 through the cover portion 112 b and the first piping portion 106.

  As described above, the heat-resistant seal paste P is applied to the heating surface 102b at the contact portion with the sealing portion 122. Here, the heat-resistant seal paste P has no adhesive force, and the heating surface 102b and the sealing portion 122 are not bonded. The sealing part 122 is pressed against the heating plate 102 by the urging force of the pressing part 112. On the other hand, the heating plate 102 is fixed by the support part 110. Therefore, the sealing portion 122 and the heating surface 102b of the heating plate 102 are in close contact with each other, and gas leakage of exhaust gas and fuel gas to the heat insulating portion 118 side of the combustion chamber 120 is prevented or suppressed.

  Further, the combustion unit 104 is not restricted from moving in the surface direction of the heating surface 102 b with respect to the heating plate 102. Therefore, for example, if the pressing portion 112 is contracted to the cover portion 112b side than the state shown in FIG. 2A and the pedestal 112a is removed, the combustion unit 104 is within the range of the heating surface 102b of the heating plate 102, It can be freely arranged in the surface direction of the heating surface 102b. When the combustion unit 104 is moved to a desired position and the pedestal 112 a is removed, the pressing part 112 is contracted to the cover part 112 b side and the pedestal 112 a is sandwiched between the pressing part 112 and the wall W. Relocation of is completed. Thus, the arrangement of the combustion unit 104 can be changed according to the type of the object to be fired, the temperature distribution of the radiation surface 102a can be easily changed, and the object to be fired can be efficiently heated. .

  Further, since the variable portions 106 a and 108 a are formed in the first piping portion 106 and the second piping portion 108, when changing the arrangement of the combustion unit 104, the variable portions 106 a and 108 a are matched with the arrangement of the combustion unit 104. Just bend it. Therefore, it is possible to improve the work efficiency by eliminating the trouble of changing the first piping part 106 and the second piping part 108.

  Even if one or both of the heating plate 102 and the combustion unit 104 are thermally expanded, the combustion unit 104 is not restricted from moving in the surface direction of the heating surface 102b with respect to the heating plate 102. Thermal stress is not generated at the contact portion between the plate 102 and the combustion unit 104. Therefore, thermal fatigue can be suppressed and durability can be improved.

  Moreover, since it is not necessary to weld the sealing part 122 and the heating plate 102, and it is not necessary to take a complicated shape for welding, the manufacturing cost can be reduced.

  Further, the heating plate 102 is not fixed to the combustion unit 104. For example, when the heating plate 102 is deteriorated, the heating plate 102 can be easily removed, and the workability of component replacement is improved.

(First modification)
FIG. 4 is an explanatory diagram for explaining a first modification. In the above-described embodiment, the case where the pressing portion 112 is configured by an elastic member such as a spring has been described. In the first modified example, as shown in FIG. 4, the pressing portion 212 includes a male screw member 212c fixed to the cover portion 112b and a female screw member 212d rotatably supported by the pedestal 112a. Is done.

  A thread groove is formed in the male screw member 212c, and the male screw member 212c is screwed into a screw hole provided in the female screw member 212d. By rotating the female screw member 212d, the male screw member 212c moves in a direction perpendicular to the heating surface 102b. When the female screw member 212d is rotated so that the male screw member 212c approaches the heating surface 102b, the cover portion 112b is pressed toward the heating surface 102b, and the entire combustion unit 104 is pressed against the heating plate 102.

  Even the pressing portion 212 of the first modified example has the same effect as the above-described embodiment. Further, the pressing portion 212 can adjust the pressing force by the rotation of the female screw member 212d. Therefore, the combustion unit 104 can be pressed against the heating plate 102 with an optimal pressing force according to the use conditions, and it is possible to suppress the bending of the heating plate 102, gas leakage, and the like.

(Second modification)
FIG. 5 is an explanatory diagram for explaining a second modification. In the above-described embodiment, the case where the support portion 110 is configured by the rod member 110a and the nut 110b has been described. In the second modified example, the support portion 310 includes a locking plate 310c and a spring member 310d in addition to the rod member 110a and the nut 110b.

  The locking plate 310c is formed of, for example, a circular flat plate, and has a hole through which the rod member 110a is inserted. The locking plate 310c is located closer to the wall W than the nut 110b. A spring member 310d is disposed between the locking plate 310c and the nut 110b. Although the position of the nut 110b is fixed by being screwed to the rod member 110a, the locking plate 310c is movable in the axial direction of the rod member 110a, and receives the urging force of the spring member 310d to move toward the wall W side. It is pressed.

  The heating plate 302 is formed with bent portions 302c that are recessed in the surface direction of the radiation surface 102a on both ends in the surface direction of the radiation surface 102a, and each of the bent portions 302c is locked to the locking plate 310c. . On the locking plate 310c, the weight of the heating plate 302 and the combustion unit 104 and the pressing force by the pressing portion 112 act, and the spring member 310d contracts.

  Thus, even if it is the structure which latches the heating plate 302 with the latching plate 310c, it has an effect similar to embodiment mentioned above. In addition, since the heating plate 302 and the locking plate 310c are not fixed, the heating plate 302 can be easily removed and parts can be easily replaced.

(Third Modification)
FIG. 6 is an explanatory diagram for explaining a third modification. FIG. 6A shows a side view of the combustion heater 400 in the third modification, and FIG. 6B shows a flange. The front view of the part 402a is shown, and the top view of the combustion heater 400 is shown in FIG.6 (c).

  In the above-described embodiment, the case where the first piping unit 106 and the second piping unit 108 are configured to include the variable units 106a and 108a has been described. In the third modified example, as shown in FIG. 6A, the first piping unit 406 and the second piping unit 408 are configured by connecting a plurality of pipings 402.

  Flange portions 402a are formed at both ends of the pipe 402, and adjacent pipes 402 are fixed by nut tightening or the like with the flange portions 402a of the two pipes 402 in contact with each other.

  As shown in FIG. 6B, a plurality of through holes 402b for tightening nuts are provided in the flange portion 402a so as to be spaced apart from each other in the circumferential direction of the flange portion 402a. ing. Adjacent pipes 402 can be connected by rotating their flange portions 402a to an arbitrary angle with an interval of 15 degrees.

  Therefore, as shown in FIG. 6C, the direction of the piping 402 can be set with a relatively high degree of freedom. This third modified example also has the same effect as the above-described embodiment. Further, the combustion unit 104 can be arranged with respect to the heating plate 102. When the arrangement of the combustion unit 104 is changed, the first pipe part 406 and the second pipe are selected by selecting a combination of one or a plurality of pipes 402 and a rotation angle of the flange part 402a in accordance with the arrangement of the combustion units 104. The unit 408 can be easily reconfigured.

  In the embodiment, the first modification, and the second modification described above, the surface direction of the heating surface 102b is within the movable range of the variable portion 106a of the first piping portion 106 and the variable portion 108a of the second piping portion 108. It was possible to arrange freely. On the other hand, in the third modification, as described above, the direction of the pipe 402 can be rotated in units of the pitch (for example, 15 degrees) of the through holes 402b of the flange portion 402a. If the length of the pipe 402 is 20 mm and the flange portion 402a on one end side of the pipe 402 is rotated by 15 degrees, the other end side is 20 mm × sin 15 ° in a vertical plane perpendicular to the rotation axis of the flange portion 402a. It will move about 5mm. Furthermore, if a plurality of types of pipes 402 having different lengths are prepared, even smaller movements are possible. Depending on the setting of the pitch of the through holes 402b of the flange portion 402a, the combustion unit 104 can be moved with a finer resolution. However, the purpose of this embodiment is to change the temperature distribution. It is not necessary to move up to the resolution.

  The first piping unit 406 is connected to a supply source F such as a fuel pump or an air compressor, and the second piping unit 408 is connected to an exhaust duct D or the like. As a result, the combustion unit 104 is fixed to the supply source F, the exhaust duct D, and the like via the first piping unit 406 and the second piping unit 408.

  At this time, by appropriately selecting the combination of the pipes 402, the first pipe part 406 and the second pipe part 408 have a dimensional relationship that presses the combustion unit 104 against the heating plate 102. Therefore, since the first piping part 406 and the second piping part 408 perform substantially the same function as the pressing part 112 described above, it is not necessary to provide the pressing part 112 separately, and the manufacturing cost can be reduced. .

  As described above, according to the embodiment and the modification described above, the temperature distribution of the radiation surface 102a can be easily changed, the object to be fired is efficiently heated, and the combustion unit 104 and the heating plate 102, The thermal stress at the contact portion with 302 can be suppressed, and the durability can be improved.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  For example, in the above-described embodiment and modification, the combustion heaters 100 and 400 have been described with respect to the case where the three combustion units 104 are arranged in a row on the one heating plate 102 and 302. One combustion unit 104 may be arranged in 302, or a plurality of combustion units 104 may be arranged. In addition, the combustion units 104 may be arranged in two or more rows.

  In the above-described embodiment and modification, the case where the heating plate 102 is a thin plate member and the heating plate 302 has a shape obtained by deforming the thin plate member has been described. However, the heating plates 102 and 302 may be increased in rigidity by increasing the thickness or fixing the auxiliary frame to the heating plates 102 and 302. When the rigidity is increased, a gap is less likely to be generated at the contact portion between the heating plates 102 and 302 and the sealing portion 122. Further, when the thickness of the heating plates 102 and 302 is increased, the temperature distribution on the radiation surface 102a can be made uniform.

  INDUSTRIAL APPLICABILITY The present invention can be used for a combustion heater that burns fuel gas to heat an object to be fired.

100, 400 Combustion heaters 102, 302 Heating plate 102a Radiation surface 102b Heating surface 104 Combustion units 106, 406 First piping part 106a Variable part 108, 408 Second piping part 108a Variable part 110, 310 Supporting part 112, 212 Pressing part 114 Arrangement plate 116 Partition plate 118a Outer peripheral portion 120 Combustion chamber 122 Sealed portion 126 Introduction flow path 128 Exhaust flow path 402 Piping

Claims (4)

A heating plate having a radiation surface;
A combustion chamber that is disposed in contact with a heating surface opposite to the radiation surface of the heating plate and that uses the heating surface of the heating plate as a part of the side wall, and that exhausts fuel from the combustion chamber One or more combustion units in which an exhaust passage for discharging gas is formed;
A pressing portion for pressing the combustion unit against the heating plate;
With
The combustion heater is characterized in that the combustion unit can be arranged in the surface direction of the heating surface within the range of the heating surface of the heating plate. The combustion unit is
An arrangement plate disposed opposite to the heating plate;
A partition plate disposed between the heating plate and the arrangement plate;
An outer peripheral portion located on the outer peripheral side of the arrangement plate and extending in the opposing direction of the heating plate and the arrangement plate along the outer periphery of the arrangement plate;
An introduction flow path for guiding the fuel gas continuously to the combustion chamber, with the arrangement plate and the partition plate as side walls;
And further comprising
The combustion chamber is formed by being surrounded by the heating plate and the outer peripheral portion,
The combustion heater according to claim 1, wherein the exhaust passage is formed with the heating plate and the partition plate as side walls, and the fuel gas is preheated by the heat of the exhaust gas through the partition plate. . A first pipe connected to the combustion unit and introducing the fuel gas into the combustion unit;
A second pipe connected to the combustion unit and exhausting the exhaust gas from the combustion unit;
Further comprising
The combustion heater according to claim 1 or 2, wherein a variable portion that is bent in accordance with an arrangement of the combustion unit is formed in the first piping portion and the second piping portion. Connecting one or more pipes selected in accordance with the arrangement of the combustion unit, connected to the combustion unit, and a first pipe part for introducing the fuel gas into the combustion unit;
A second pipe part connected to the combustion unit and connecting the one or more pipes selected in accordance with the arrangement of the combustion unit, and discharging the exhaust gas from the combustion unit;
Further comprising
The combustion heater according to claim 1 or 2, wherein the first piping portion and the second piping portion function as the pressing portion.

Images