JP2018008076A - Continuous rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous rice cooker capable of improving heating efficiency and shortening a heating time, and achieving excellent rice cooking.SOLUTION: There is provided premixed gas supply means which supplies whole primary air premixed gas in each surface burning burner unit by: constituting and arranging a surface burning burner unit 400 by arranging in a boiling heating zone A and a boiling keeping heating zone B, a plurality of burner heads by making the long sides of the rectangular burner heads 406 which burn whole primary air premixed gas in a red-heat state by a surface burning member substantially parallel to the transport direction of a rice cooking pot and making intervals in the direction substantially orthogonal to the transport direction of the rice cooking pot; and constituting and arranging in a burning heating zone C, the surface burning burner unit by forming two rectangular burner heads having almost the same lengths in the long side direction, for burning whole primary air premixed gas in a red-heat state by a surface burning member, in a V shape in a direction in which the burner heads cross each other with a prescribed angle.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a continuous rice cooker that cooks rice continuously and in large quantities, particularly like school lunches and hospital meals.

  The following are known as continuous rice cookers that use a conventional gas combustion burner as a heating source and cook rice while continuously conveying and moving the rice cooker in one direction by a conveyor.

  This is a continuous rice cooking device in which an infrared burner for continuously heating infrared rays along the traveling path is provided on the bottom of the rice cooking pot that linearly travels in the heating chamber by a linearly traveling conveyor (see, for example, Patent Document 1). ).

  Further, it is an improvement proposal by the present applicant of the basic problem described in Patent Document 1, and is a rectangular shape in which all primary air premixed gas is burned in a red hot state with a surface combustion member using a heat-resistant metal fiber. A plurality of the burner heads are arranged with the long side of the rectangular burner head substantially parallel to the conveying direction of the rice cooker and spaced apart from each other in a direction substantially perpendicular to the conveying direction of the rice cooker. There exists what was made into the continuous rice cooker (for example, refer patent document 2).

Japanese Utility Model Publication No. 2-33273 JP 2012-65730 A

  However, what is described in Patent Document 1 is an arrangement in which an infrared burner is disposed over the entire bottom surface of the rice cooker, and the rice cooker that runs linearly in the heating chamber is heated by this infrared burner. The convection of the rising rice water and the convection of the falling rice water are randomly mixed on the entire bottom surface of the rice bowl and are not stable, and it is difficult to form an ascending convection path that reaches the top surface of the cooking water. The path cannot be formed reliably. For this reason, it was easy to produce a temperature difference in the up-and-down direction of rice cooking water, and it was difficult to perform favorable rice cooking.

  Moreover, although what was described in the said patent document 2 aimed at the improvement of the basic subject of what was described in the said patent document 1, the cooking heating zone which has in the conveyance direction of a rice cooker, boiling maintenance In the whole heating zone and baking heating zone, it has been desired to further improve the heating efficiency and particularly to optimize the heating state of the rice cooking pot in the baking heating zone so as to obtain good cooked rice.

  This invention solves the said conventional subject, and aims at providing the continuous rice cooking apparatus which can implement | achieve favorable rice cooking while being able to aim at the improvement of heating efficiency and shortening of heating time. To do.

The continuous rice cooker of the present invention is a heating means that is arranged with a space below the rice cooking pot that is conveyed by the conveying means and a conveying means that continuously conveys the rice cooking pot containing rice and rice cooking water in one direction. A continuous rice cooker having a burner and sequentially cooking and heating zone, boiling maintenance heating zone, baking heating zone in the conveying direction of the rice cooker,
In each of the cooked heating zone and the boiling maintenance heating zone, a rectangular burner head for burning all primary air premixed gas in a red hot state by a surface combustion member using a heat-resistant metal fiber is used. The surface combustion burner unit is configured and arranged with a plurality of burner heads arranged at intervals in the direction substantially perpendicular to the conveying direction of the rice cooker with the long side of the rice cooker being substantially parallel to the conveying direction of the rice cooker,
In the baked heating zone, two rectangular burner heads having substantially the same length in the long side direction in which all primary air premixed gas is burned in a red hot state by a surface combustion member using the heat-resistant metal fibers are predetermined. The surface combustion burner unit is disposed in the cooked heating zone, the boiling maintenance heating zone, and the baked heating zone. Each is provided with premixed gas supply means for supplying all the primary air premixed gas.

  According to the continuous rice cooking apparatus of this invention, while improving a heating efficiency and shortening of heating time, favorable rice cooking can be implement | achieved.

The external appearance front view which shows the whole continuous rice cooking apparatus of one Embodiment of this invention. The external appearance side view seen from the carrying-in direction of the rice cooker of a continuous rice cooker. The external appearance top view of a continuous rice cooker. Front side principal part block diagram of a continuous rice cooker. The cross-sectional block diagram in the AA in FIG. The partial perspective view of a vertical wall part. The block diagram of a partition wall. Sectional block diagram in the BB line in FIG. FIG. 9 is a cross-sectional configuration diagram along line CC in FIG. 8. FIG. 9 is a cross-sectional configuration diagram taken along line DD in FIG. 8. The plane block diagram of the surface combustion burner unit using a heat-resistant metal fiber. The partial cross section block diagram in the EE line | wire in FIG. (A) The top view of a 1st burner head, b) The side view of the same long side direction, (c) The side view of the same short side direction. (A) The top view of a 2nd burner head, (b) The side view of the same long side direction, (c) The side view of the same short side direction. The partial cross section block diagram in the FF line | wire in FIG. The block block diagram which shows the basic composition of a combustion system. The figure which shows the convection state in the pot at the time of cooking rice pot heating. The state figure which mixed the blue combustion flame during the red hot combustion of the surface combustion member. FIG. 9 is an enlarged view showing a partial plan view of a boiling maintenance heating zone and a baking heating zone in FIG. 8. FIG. 20A is a partial cross-sectional configuration diagram taken along the line GG in FIG. 19, and FIG. 19B is a partial cross-sectional configuration diagram taken along the line HH in FIG. The plane block diagram which shows the other Example of the surface combustion burner unit of a baking heating zone. The plane block diagram which shows the other Example of the surface combustion burner unit of a baking heating zone. The plane block diagram which shows the other Example of the surface combustion burner unit corresponding to the cross-sectional block diagram in the BB line in FIG. The plane block diagram which shows the other Example of the surface combustion burner unit corresponding to the cross-sectional block diagram in the BB line in FIG. The plane block diagram which shows the other Example of the surface combustion burner unit corresponding to the cross-sectional block diagram in the BB line in FIG. The plane block diagram which shows the other Example of the surface combustion burner unit corresponding to the cross-sectional block diagram in the BB line in FIG.

The invention according to claim 1 of the present invention has a conveying means for continuously conveying a rice cooker containing rice and rice cooking water in one direction, and a space below the rice cooking pot conveyed by the conveying means. A continuous rice cooker equipped with a heating zone, a boiling maintenance heating zone, and a baking heating zone sequentially in the conveying direction of the rice cooker,
In each of the cooked heating zone and the boiling maintenance heating zone, a rectangular burner head for burning all primary air premixed gas in a red hot state by a surface combustion member using a heat-resistant metal fiber is used. The surface combustion burner unit is configured and arranged with a plurality of burner heads arranged at intervals in the direction substantially perpendicular to the conveying direction of the rice cooker with the long side of the rice cooker being substantially parallel to the conveying direction of the rice cooker,
In the baked heating zone, two rectangular burner heads having substantially the same length in the long side direction in which all primary air premixed gas is burned in a red hot state by a surface combustion member using the heat-resistant metal fibers are predetermined. The surface combustion burner unit is disposed in the cooked heating zone, the boiling maintenance heating zone, and the baked heating zone. The continuous rice cooker is characterized by comprising premixed gas supply means for supplying all the primary air premixed gas for each.

  As a result, in the cooking heating zone and the boiling maintenance heating zone, a plurality of rectangular burner heads are arranged on the same line in parallel with the conveying direction of the rice cooker, and the same portion at the bottom of the moving rice cooker is continuous. The circulation path that convects up and down in the rice cooker is surely formed without gaps. As a result, a circulation path that convects up and down in the rice cooker is reliably formed without gaps, further promoting the swelling and gelatinization of the rice, while maintaining the rice cooker at approximately 100 degrees C in the baked heating zone. Heat the rice cooker as a whole, partially overheat the lid, and reduce the temperature difference to completely evaporate the remaining water on the inner surface of the rice cooker and the inner surface of the lid so that the rice is steamed. It can be done.

  Further, by providing premixed gas supply means for supplying all primary air premixed gas to each surface combustion burner unit, each surface combustion burner unit in the cooking heating zone, boiling maintaining heating zone, and baking heating zone is provided. The amount of combustion of the surface combustion burner unit arranged in each zone can be set according to the amount of heating to the rice cooker.

  Accordingly, it is possible to provide a continuous rice cooking apparatus that can improve the heating efficiency and shorten the heating time and can realize good rice cooking.

The invention according to claim 2 is the invention according to claim 1, in which all primary air ejected from the burner head to each of the surface combustion burner units arranged in the cooking heating zone, the boiling maintenance heating zone, and the baking heating zone is provided. The continuous rice cooking apparatus is characterized by comprising: an ignition means for igniting a premixed gas to start combustion; and a combustion detection means for detecting a combustion flame ignited by the ignition means to start combustion. .
Thereby, each of a burner head, an ignition means, and a combustion detection means can be previously fixed and integrated in the optimal positional relationship. Further, the ignition means, the combustion detection means, the premixed gas supply means, and the like control the whole as a continuous rice cooker.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the surface combustion burner unit arranged in the baking and heating zone has one end side in the long side direction of the two rectangular burner heads connected to each other. Proximate or contact to form an apex portion, the other end side of the long side direction of the two rectangular burner heads are positioned so as to spread apart from each other along the conveying direction of the rice cooker, the apex portion Among the burner heads that are odd numbers in the boiling maintenance heating zone, the burner heads are arranged close to or in contact with the long-side ends of the burner heads that are located at substantially the center in the direction orthogonal to the conveying direction of the rice cooker, 2 The other end of the long side of the rectangular burner head is extended to the outside of the horizontal portion of the bottom surface of the rice cooker and formed on both the outside and inside of the V-shaped rectangular burner head. Three without heating action Continuous rice cooking characterized in that heating is performed while continuously changing the heating position of the bottom of the rice cooker from the central portion of the rice cooker to the outside simultaneously with the continuous change in the area of the non-heating area of the shape It is a device.
This causes a continuous change in the area of the triangular non-heating area at the same time as a continuous change in the heating position (heating part) of the bottom of the rice cooker from the center of the rice cooker toward the outside. In addition, the entire rice cooker and the lid entering the baking heating zone from the boiling maintenance heating zone can be brought to a uniform temperature without partial overheating.

Invention of Claim 4 respond | corresponds to the increase in the quantity of the surface combustion burner unit arrange | positioned in each of a cooking heating zone and a boiling maintenance heating zone in the invention of any one of Claims 1-3. The continuous rice cooking apparatus is characterized in that the length of the long side direction of the two rectangular burner heads in the baking heating zone is increased and the predetermined angle (θ) is decreased. Is.
Thereby, in the structure which increases the amount of rice cooking per unit time by the speeding up of the conveyance by the conveying means of the rice cooker, the size of the burner head configured in a V shape of the baking heating zone is lengthened and the rice cooking time as a whole Can be adjusted.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein each of the two rectangular burner heads constituting the V shape is a plurality of rectangular burner heads. It is set as the continuous rice cooker characterized by comprising and arranging.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the burner head arranged in the baking heating zone is a rectangular burner head arranged in the boiling maintenance heating zone. It is set as the continuous rice cooker characterized by this.

The invention according to claim 7 is the continuous rice cooking characterized in that in the invention according to any one of claims 1 to 6, an opening for introducing air is provided in a non-heated area formed in the baked heating zone. It is a device.
As a result, convection air is mixed into the combustion exhaust gas through this opening, and the temperature of the combustion exhaust gas is adjusted and the bottom of the rice cooker is cooled. Can be set.

  Hereinafter, a continuous rice cooker according to an embodiment of the present invention will be described with reference to FIGS.

  First, the basic structure of the continuous rice cooker of this invention is demonstrated. The continuous rice cooking apparatus of the present invention is roughly divided into a main body outer shell 100, a main body inner shell 200 disposed inside the main body outer shell 100, a rice cooker 300 positioned inside the main body inner shell 200, and heat-resistant metal fibers. The surface combustion burner unit (heating means) 400 used and the premixed gas supply means 500 for supplying the premixed gas obtained by mixing the gas and the combustion air to the surface combustion burner unit 400 are included.

  As shown mainly in FIGS. 1 to 5, the main body outer portion 100 has a front lower case 103 and a side lower case 104 located in a lower portion based on a skeleton member 101 in which a plurality of legs 102 are fixed to the floor surface side. The front lower case 103 is provided with openings 103a and 103b. The burner fixing member 101 a is fixed to the skeleton member 101. A front intermediate case 105 is provided which is connected to the upper part of the front lower case 103 and extends to the side surface, and a top plate case 106 which is connected to the front intermediate case 105 and is semicircular in side view is provided. Side top plate cases 107 are fixed to both side surfaces of the case 106.

  Moreover, the opening part enclosed by the side lower case 104, the front intermediate case 105, and the side top plate case 107 is made into the carrying-in opening 108 (right side surface) and the carrying-out opening 109 (left side surface) of the rice cooker 300. Note that an opening 106a is formed at a distance from the outer peripheral surface of the exhaust tube 212 and the top plate case 106 (see FIG. 5).

  Further, as shown mainly in FIGS. 5 to 9, the main body inner section 200 has a space inside the front intermediate case 105 and a partition wall 201 and a space inside the top case 106. The wall 202 is positioned on both sides, and communicates with the air passage 203 between the front intermediate case 105 and the partition wall 201, and with the opening 103a formed in the front lower case 103 at the distance between the top case 106 and the partition wall 202. An air passage 204 is formed.

  In addition, the partition wall 205 is spaced on the inner side of the partition wall 201, and the partition wall 206 is positioned on both sides with the spacing on the inner side of the partition wall 202, so that the distance between the partition wall 201 and the partition wall 205 is An air passage 208 is formed in the space between the air passage 207 and the partition wall 202 and the partition wall 206. In addition, the solid line arrow in FIG. 5 shows the flow direction of air.

  In each partition wall, for example, as shown in FIG. 7, two metal plates formed in a wave shape are partially joined to each other and an air layer is included therein, A material in which a heat insulating material is sandwiched between them to enhance heat shielding properties can be used.

  Further, the partition wall 209 is positioned on both sides with a space inside the partition wall 205, and the partition wall 210 is positioned with a space inside the partition wall 209. An air exhaust gas passage 211 is formed between the partition wall 209 and the partition wall 210. An exhaust tube 212 having a damper (not shown) is provided at the center portion of the top plate case 106 in contact with the partition wall 206. Exhaust gas is discharged from the outlet of the exhaust pipe 212 to the outside through a hood (not shown). In addition, the exhaust pipe 212 is provided corresponding to each of the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C.

  A pair of endless conveyors (conveying means) 213 are positioned inside the partition wall 210 along the conveying direction of the rice cooker 300, and the conveyor 213 is supported by the conveyor support 214 and rotates.

  The vertical wall portions 215 are provided on both sides of the rice cooker 300 and substantially parallel to the conveying direction of the rice cooker 300. As shown in FIGS. 6 and 9, the vertical wall portion 215 is formed in a box shape with an outer case 216 and an inner case 217, and a heat insulating material 219 is sandwiched therebetween. The inner case 217 has a plurality of openings 220, and the outer case 216 has a plurality of exhaust ducts 221 having dampers 221 a facing the openings 220. In addition, an exhaust gas passage 218 that connects the opening 220 and the exhaust duct 221 is formed in the heat insulating material 219. In addition, the inner surface (rice cooker 300 side) of the inner case 217 is configured to effectively reflect heat as a material having a mirror finish and a high heat reflectance.

  The vertical wall portion 215 is fixed on the burner fixing member 101a, and a plurality of the vertical wall portions 215 are provided on both sides parallel to the conveying direction of the rice cooker 300 corresponding to each of the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C. ing.

  A carry-in roller 222 for placing the flanges on both sides formed on the rice cooker 300 on the conveyor 213 is provided at the carry-in opening 108 portion of the rice cooker 300, and the rice cooker 300 is conveyed at the carry-out opening 109 portion of the rice cooker 300. An unloading roller 223 that is removed from the 213 is provided.

  As shown in FIG. 5, an exhaust gas collecting space 225 is formed in the upper part of the rice cooker 300 and inside the partition wall 206, and a water heat exchanger 224 for preheating rice cooked water or the like poured into the rice cooker 300 is provided here. It is located.

  A tunnel-like shape is formed in the space surrounded by the bottom and side surfaces of the rice cooker 300 having the lid 301, the vertical wall portion 215, and the surface combustion burner unit 400 using heat-resistant metal fibers from the carry-in opening 108 to the carry-out opening 109 of the rice cooker 300. The heating chamber 302 is configured. In addition, the lower part of the vertical wall part 215 is connected and fixed to both sides of the surface combustion burner unit 400.

  Next, the basic configuration of the surface combustion burner unit 400 using heat-resistant metal fibers disposed in each of the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C will be described.

  First, the surface combustion burner unit 400 disposed in the cooked heating zone A and the boiling maintenance heating zone B will be described mainly with reference to FIGS. As shown in FIG. 8, a plurality of surface combustion burner units 400 are arranged in the conveying direction of the rice cooker 300 so as to face the bottom surface of the rice cooker 300, and are fixed to the burner fixing member 101a. In the embodiment, two units of the surface combustion burner unit 400 are arranged. However, the present invention is not limited to this, and can be optimally selected depending on the amount of rice cooking, the conveyance speed of the rice cooker 300, and the like.

  The surface burning burner unit 400 using heat-resistant metal fibers as the surface burning member is substantially in the conveying direction of the rice cooker 300 and the first burner head 401 that is rectangular in a top view in a direction substantially orthogonal to the conveying direction of the rice cooking pot 300. A plurality of second burner heads 406 that are rectangular in a top view in a parallel direction are provided. In the embodiment, five (odd number) second burner heads 406 are arranged at predetermined intervals in a direction substantially orthogonal to the conveying direction of the rice cooker 300. The number of second burner heads 406 is not limited to this.

  In the first burner head 401 and the plurality of second burner heads 406, one side of the short side 407 b side of the plurality of rectangular second burner heads 406 is one of the long sides of the first burner head 401. It is constructed and arranged in a comb-like shape so as to be close to or in contact with the side surface 402a.

  As the surface burning member, there are a metal knit in which heat-resistant metal fibers are knitted in a knit shape, and a metal fiber mat in which heat-resistant metal fibers are randomly laminated and fixed on a porous substrate. Any one of the above can be used as the surface combustion member for the surface combustion member 405, 405a, 410, 410a, 410b, 410c, and the same can be performed. As the surface combustion member, a ceramic plate in which a large number of holes are formed may be used, but it is preferable to use a heat-resistant metal fiber from the viewpoint of fracture strength and water resistance.

  The metal knit and the metal fiber mat form a thin film-like combustion flame at the surface portion of the heat-resistant metal fiber, and the surface portion immediately becomes a red hot state from the start of combustion. Moreover, since a combustion flame is formed from heat-resistant metal fibers, the flame holding property is excellent, and a wide range of combustion amounts can be set. In addition, it is flexible, has excellent workability, and is resistant to thermal shock.

  As shown in FIG. 13, the first burner head 401 having a direction substantially orthogonal to the conveying direction of the rice cooker 300 is based on a pipe-like burner case 402 whose both ends are closed, and on the upper surface of the burner case 402. A large number of small holes 403 are formed to cover the small holes 403, and the surface combustion members 405 and 405a are electrically welded to the upper surface and one side surface 402a of the long side (the plurality of second burner heads 406 side). For example, it is almost adhered and fixed. The surface combustion member 405a is integrally formed by bending from the surface combustion member 405.

  In addition, a large number of small holes 403 formed on the upper surface of the burner case 402 are formed in the long side direction at positions offset toward the surface combustion member 405a. Further, a connecting tube 404 is fixed to the bottom of the center portion of the burner case 402 in the long side direction.

  The plurality of second burner heads 406 in a direction substantially parallel to the conveying direction of the rice cooker 300 is based on a pipe-like burner case 407 whose both ends are closed as shown in FIG. A plurality of small holes 408 are formed in a multi-row shape on the upper surface of 407, and the small holes 408 are covered, and a surface is formed on the upper surface of the burner case 407, the side surface 407a on both sides of the long side, and the one side surface of the short side 407b The combustion members 410, 410a, 410b, and 410c are fixed in close contact with each other by electric welding or the like.

  The surface combustion member 410 is bent to integrally form 410a, 410b, 410c, and the surface combustion members 410a, 410b are fixed to the side surfaces 407a on both long sides of the burner case 407 by electric welding or the like. is there.

  Further, a connecting pipe 409 is fixed to the bottom of the burner case 407. The position of the premixed gas introduction pipe 409 is fixed to the bottom part of the center part of the burner case 407 in the long side direction.

  A surface combustion burner unit 400 having a first burner head 401 having a direction substantially orthogonal to the conveying direction of the rice cooker 300 and a plurality of second burner heads 406 having a direction substantially parallel to the conveying direction of the rice cooker 300, As shown in FIGS. 11 and 12, a unit case 411 is provided, and a leg (not shown) provided with a first burner head 401 and a plurality of second burner heads 406 on the unit case 411 is provided. Fixed.

  Further, in a state where the heat insulating material 413 is accommodated in the unit case 411, the heat reflecting plate 412 is covered and fixed to the unit case 411 so that the upper portions of the first burner head 401 and the second burner head 406 are exposed. . As shown in FIG. 11, the heat reflecting plate 412 is provided with a plurality of small openings 412 a in the vicinity of the second burner head 406.

  Further, two spark bars (ignition means) 414 and a frame rod (combustion detection means) 415 having a predetermined interval are fixed to the unit case 411 via a fixing member. The substantially horizontal tip of the spark bar 414 is close to the top of the first burner head 401, and the substantially horizontal tip of the frame rod 415 is the top of the first burner head 401 and the second burner head 406 located in the center. Is located close to.

  As shown in FIG. 16, the spark bar 414 is connected to an igniter 414a that generates a high voltage, and the frame rod 415 is connected to a DC application power source 415a.

  In addition, although it was set as the ignition means by the spark system between the two spark bars 414, it is not limited to this, Other means, such as a red-hot electric heater, may be used. Further, the first burner head 401 and the plurality of second burner heads 406 may be manually ignited by a gas torch or the like.

  In addition, as a combustion detection means, the flame rod 415 and the DC applied power source 415a are used as the combustion detection means for detecting the electrical conductivity of the combustion flame. However, the detection means is a thermocouple means, or a remote detection means such as infrared detection or ultraviolet detection. There may be.

  Moreover, as shown in FIG. 11, the length of the long side direction of the 1st burner head 401 is substantially the same as the width | variety of the bottom face of the rice cooker 300 of the direction orthogonal to a conveyance direction. Furthermore, the width (W2) between the outer sides of the outermost second burner heads 406 among the plurality of second burner heads 406 in the direction along the conveying direction of the rice cooker 300 is orthogonal to the conveying direction. The width is smaller than the width of the bottom surface of the rice cooker 300 in the direction, and is slightly smaller than the width of the horizontal surface of the bottom surface of the rice cooker 300.

  Further, the short side width (W1) of the first burner head 401 is configured to be smaller than the short side width (W3) of the second burner head 406. The interval between the plurality of second burner heads 406 is indicated by (W4).

  As described above, the first burner head 401 having a direction substantially orthogonal to the conveying direction of the rice cooker 300, the plurality of second burner heads 406 having a direction substantially parallel to the conveying direction of the rice cooker 300, and these are integrated. Unit case 411 to be fixed in a fixed manner, a heat insulating material 413 is accommodated in the unit case 411, and a heat reflecting plate 412 is provided on the heat insulating material 413 to form one basic surface combustion burner unit 400 It is.

  The surface combustion burner unit 400 is preferably provided with ignition means and combustion detection means. Thus, each of the first burner head 401, the plurality of second burner heads 406, the ignition means, and the combustion detection means can be fixed and integrated in advance in an optimal positional relationship.

  As shown in FIG. 4 and FIG. 8, the cooking direction of the rice cooker 300 is roughly divided into the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C in order from the loading opening 108 side. However, in principle, the surface combustion burner units 400 using heat-resistant metal fibers are disposed in these zones. In addition, the first burner head 401 is positioned on the carry-in opening 108 side of the rice cooker 300.

The distance between the bottom surface of the rice cooker 300 and the surfaces of the plurality of second burner heads 406 is, for example,
In the cooking and heating zone A, it is approximately 30 mm, and in the boiling maintenance heating zone B, it is 35 to 40 mm. That is, in the cooked heating zone A, the distance between the bottom surface of the rice cooker 300 and the surfaces of the plurality of second burner heads 406 is set smaller than in the boiling maintenance heating zone B. In the baking and heating zone C, it is approximately 40 mm.

  Each surface combustion burner unit 400 using heat-resistant metal fibers is provided with vertical wall portions 215 on both sides in the conveying direction of the rice cooker 300, and the surface combustion burner unit 400 and the vertical wall portion 215 are connected to each other.

  In addition, the arrangement | positioning position and number of the surface combustion burner unit 400 in the cooking heating zone A and the boiling maintenance heating zone B are examples, and are not limited to this. For example, a plurality of surface combustion burner units 400 may be arranged for each zone, or one surface combustion burner unit 400 may be arranged across a plurality of zones.

  As shown in FIG. 16, the premixed gas supply means 500 has a blower 501 that supplies combustion air, and discharges air from the blower 501 to the air gas mixing unit 502. The supply pressure of air from the blower 501 to the air gas mixing unit 502 is applied to the air-fuel ratio proportional control device 505 via the branch pipe 503. An air flow switch that detects the supply pressure of air is provided in the middle of the branch pipe 503.

  A gas pipe 506 for supplying gas via a cock 507 is connected to the inlet of the air-fuel ratio proportional control device 505, and further to the air gas mixing unit 502 via the cock 509 to the outlet of the air-fuel ratio proportional control device 505. A gas pipe 508 for supplying gas is connected.

  A premixed gas of air and gas is supplied from the air gas mixing unit 502 to the first burner head 401 via the premixed gas supply pipe 510 and the connecting pipe 404, and the premixed gas is supplied to the premixed gas supply pipe 511, A plurality of second burner heads 406 are supplied through the connecting pipe 409. In the process of supplying the premixed gas from the premixed gas supply pipe 511 to the plurality of second burner heads 406, the flow rate adjusting valves 512 are provided.

  The premixed gas supply means 500 includes the premixed gas supply means 500 for each surface combustion burner unit 400, but this is an example and the present invention is not limited to this. For example, the premixed gas may be supplied to the plurality of surface combustion burner units 400 by one premixed gas supply means 500.

  Further, the premixed gas is supplied to each first burner head 401 included in the plurality of surface combustion burner units 400 by one premixed gas supply means 500, and each of the plurality of first burner units 400 included in the plurality of surface combustion burner units 400 is provided. The premixed gas may be supplied by providing premixed gas supply means 500 to the second burner head 406.

  Although not shown in the figure, the ignition means, the combustion detection means, the drive of the conveyor that is the conveying means of the rice cooker 300, the premixed gas supply means 500, etc. are each a controller that controls the whole as a continuous rice cooker. And an operation unit.

Next, the surface combustion burner unit 400 arranged in the baking heating zone C will be described with reference to FIGS. First, the configuration shown in FIGS. 19 and 20 will be described.
The baked heating zone C includes a second burner head basically configured in the same manner as the second burner head 406 used in the plurality of surface combustion burner units 400 arranged in the cooked heating zone A and the boiling maintenance heating zone B. The surface combustion burner unit 400 is configured by arranging two 406.

  As shown in FIGS. 8 and 19, the two second burner heads 406 are basically arranged in a V-shape having an angle of θ1 and intersecting each other. The V-shaped apex portion 421 in which one end side of the long side direction of the burner head 406 is close to or in contact with each other is brought into the boiling maintenance heating zone B side (the loading opening 108 side of the rice cooker 300, the upstream in the conveying direction of the rice cooker 300). The other end side in the long side direction of the two second burner heads 406 has an angle of θ1, and the unloading opening 109 side of the rice cooker 300 (the downstream side in the conveying direction of the rice cooker 300) ) To spread apart from each other. That is, the second burner heads 406, which are the plurality of rectangular burner heads, are arranged in a V shape by being inclined in the conveying direction of the rice cooker 300.

  Further, in the inner region of the two second burner heads 406 arranged in a V shape, the area expands toward the unloading opening 109 side of the rice cooker 300 (downstream side in the conveying direction of the rice cooker 300) 2. A substantially triangular non-heating region 419 that is not heated by the second burner head 406 is formed.

  Further, in the outer region of the two second burner heads 406 arranged in a V shape, the area decreases toward the unloading opening 109 side of the rice cooking pot 300 (downstream side in the conveying direction of the rice cooking pot 300) 2. The two non-heating areas 420 having a substantially triangular shape without the heating action by the second burner head 406 of the book are formed.

  Further, the V-shaped apex portion 421 of the two second burner heads 406 is an end portion (short side side) in the long side direction of the second burner head 406 located at the center of the boiling maintenance heating zone B. Is placed close to or in contact with. Further, the other end side in the long side direction of the two second burner heads 406 is arranged so as to extend to a position outside the bottom horizontal portion of the rice cooker 300.

  The unit case 411 has a plurality of openings 411a and 411b for allowing convection air to pass from the lower side to the upper side of the unit case 411.

  In the vicinity of the V-shaped apex 421 of the two second burner heads 406, the long side end (short side) of the second burner head 406 located in the center of the boiling maintenance heating zone B A cover 418 is provided for facilitating the transfer of fire to the two second burner heads 406.

  FIG. 21 is a plan view showing another embodiment of the surface combustion burner unit 400 in the baking heating zone. 19 and 20 is different from the configuration shown in FIGS. 19 and 20 in that the dimension of the surface combustion burner unit 400 in the conveying direction of the rice cooker 300 is set longer. Specifically, the dimension in the long side direction of the two second burner heads 406 is increased, and the angle forming the V shape is set to be smaller, such as θ1 to θ2.

  FIG. 22 is a plan view showing another embodiment of the surface combustion burner unit in the baking heating zone. 19, 20, and 21 is different from the configuration shown in FIGS. 19, 20, and 21 in that the surface combustion burner unit 400 is divided into two and two second burners straddling each surface combustion burner unit 400. The heads 406 are continuously arranged to form a V shape, thereby increasing the length of the two second burner heads 406 in the long side direction, and the angles forming the V shape to θ1, θ2 to θ3. As shown in FIG. In FIG. 22, a spark bar 414 and a frame rod 415 may be provided.

  Although the second burner head 406 arranged in the surface combustion burner unit 400 arranged in the baking and heating zone C is used, the present invention is not limited to this, and the first burner head 401 may be used. Of course, a new burner head may be used for the baking and heating zone C without being limited thereto.

  23 to 26 show another embodiment of the surface combustion burner unit 400 using the heat-resistant metal fiber corresponding to the cross-sectional configuration view taken along the line BB in FIG. In addition, the same code | symbol as FIGS. 1-22 shows the same location.

  In FIG. 23, a plurality of second burner heads 406a and 406b are arranged in a comb-like shape in contact with or close to both sides of the first burner head 401. 23, the structure of the surface combustion burner unit 400 located in the cooking heating zone A on the side of the carry-in opening 108 of the rice cooker 300 is combined with the surface comb burner unit 400 having a single comb tooth shape shown in FIG. You may arrange. In this case, the first burner head 401 is located on the carry-in opening side of the rice cooker 300.

  FIG. 24 shows the widths of the short sides of the plurality of second burner heads 406 substantially parallel to the rice cooker 300 conveyance direction (direction orthogonal to the rice cooker 300 conveyance direction) in the cooking heating zone A and the boiling maintenance heating zone B. (W3) is made different. In FIG. 24, the width (W3) in the short side direction of the second burner head 406 is sequentially reduced from the cooked heating zone A to the boiling maintenance heating zone B.

  FIG. 25 shows one of long sides (a direction parallel to the rice cooker 300 conveyance direction) of the plurality of second burner heads 406 substantially parallel to the rice cooker 300 conveyance direction in the cooking heating zone A and the boiling maintenance heating zone B. The lengths of the parts are different. In FIG. 25, the length of the long side of the second burner head 406 located on the outermost side among the plurality of second burner heads 406 is sequentially shortened from the cooking heating zone A to the boiling maintenance heating zone B. doing.

  FIG. 26 shows a different number of the plurality of second burner heads 406 substantially parallel to the rice cooker 300 conveying direction in the cooking heating zone A and the boiling maintenance heating zone B. In FIG. 26, the number of the plurality of second burner heads 406 is sequentially reduced from the cooked heating zone A to the boiling maintenance heating zone B. Note that the second burner head 406 may be arranged in the same row in the conveying direction of the rice cooker 300 in each zone.

  In the structure shown in FIGS. 24 to 26, it is easier to adjust the amount of heating heat to the rice cooker 300 that is transported and moved for each of the cooked heating zone A and the boiling maintenance heating zone B, and the rice cooker 300 is effectively adjusted. Can be heated.

  Furthermore, it is possible to arbitrarily combine the configurations shown in FIGS. 19, 21, 22, and 23 to 26, and the rice cooker 300 can be effectively heated.

  Next, the operation | movement operation | movement is demonstrated about the continuous rice cooker in this embodiment.

  First, in the cooked heating zone A and the boiling maintenance heating zone B, the igniter 414a is energized to generate a discharge spark between the spark bars 414 located on the first burner heads 401 of the plurality of surface combustion burner units 400.

  Next, a motor (not shown) of the blower 501 which is the premixed gas supply means 500 is energized to supply combustion air to the air gas mixing unit 502, premixed gas supply pipes 510 and 511, the first burner head 401, the second The supply to the burner head 406 is started. Further, the supply air pressure from the branch pipe 503 to the air gas mixing unit 502 is applied to the air-fuel ratio proportional control device 505 and the supply air pressure is detected by the air flow switch 504.

  Next, when the cocks 507 and 509 are opened, the combustion gas flows into the air gas mixing unit 502 via the air-fuel ratio proportional control device 505 and the gas pipe 508, and the gas and the combustion air are mixed. Further, the premixed gas obtained by mixing the gas and the combustion air is supplied from the air gas mixing unit 502 to the first burner head 401 and the plurality of second burner heads 406 via the premixed gas supply pipes 510 and 511, respectively. Is done.

  At this time, the correlation between the amount of combustion air supplied to the air gas mixing unit 502 and the supply air pressure applied from the branch pipe 503 to the air-fuel ratio proportional control device 505 is grasped, and this supply air pressure is controlled by the air-fuel ratio proportional control. The air-fuel ratio proportional control device 505 controls the amount of gas supplied to the device 505 and supplied to the air-gas mixing unit 502 so that the air-fuel ratio (air / gas mixture ratio) falls within a predetermined value range.

  The air-fuel ratio (excess air ratio) is set to 1.2 to 1.4, for example, and the combustion air amount and gas amount are set as the total primary air amount larger than the theoretical combustion air amount of gas.

  The amount of gas combustion in the first burner head 401 and the plurality of second burner heads 406 is set by controlling the gas flow rate following the supply air pressure applied to the air-fuel ratio proportional control device 505. . The change in the amount of gas combustion is performed by controlling the rotational speed of the blower 501.

  Accordingly, when the blower 501 does not rotate or reaches the specified rotation speed, no gas is supplied to the air gas mixing unit 502.

  The above-described operation is performed almost simultaneously for each of the plurality of surface combustion burner units 400 arranged in the cooking heating zone A and the boiling maintenance heating zone B.

  The premixed gas in which the gas and the combustion air are mixed is supplied from the air gas mixing unit 502 to the first burner head 401 via the premixed gas supply pipe 510, and is ejected from the small hole 403 of the burner case 402. The inside of the combustion member 405 is expanded and ejected from the surface portion. The ejected premixed gas is ignited by the discharge spark formed between the spark bars 414 and starts to burn in the entire surface combustion member 405.

  Further, the premixed gas ejected from the small hole 403 spreads from the surface combustion member 405 to the side surface combustion member 405a and burns in the same manner.

  The premixed gas obtained by mixing the gas and the combustion air is supplied from the air gas mixing unit 502 to each of the second burner heads 406 via the premixed gas supply pipe 511 and the flow rate adjusting valve 512, and the burner case 407. Are ejected from the small holes 408, expand in the surface combustion member 410, and are ejected from the surface portion.

  Further, the premixed gas ejected from the small hole 408 spreads from the surface combustion member 410 to the side surface surface combustion members 410a, 410b, 410c and is ejected in the same manner.

  The surface combustion member 405 of the first burner head 401 and the surface combustion flame of the side surface surface combustion member 405a were ejected from the surface combustion member 410 and the side surface surface combustion members 410a, 410b, 410c of the plurality of second burner heads 406. Contact with premixed gas and start burning. After the first burner head 401 and the plurality of second burner heads 406 start combustion, the discharge spark between the spark bars 414 is stopped. Further, combustion is confirmed by the frame rod 415 and the operation is continued.

  As shown in FIGS. 8, 11, and 15, the side surface combustion member 405 a of the first burner head 401 and the side surface combustion member 410 c of the second burner head 406 are brought into contact or close to each other, The fire transfer from the surface combustion flame of the side surface combustion member 405a to the premixed gas ejected from the side surface combustion member 410c is extremely short. Further, the second burner head 406 is transferred from the side surface combustion member 410c to the entire surface combustion member 410 and the side surface combustion members 410a and 410b to suppress the release of the unburned premixed gas and perform the combustion smoothly. Can be started.

  As shown in FIG. 15, by providing a step 417 by lowering the position of the surface combustion member 405 of the first burner head 401 relative to the position of the surface combustion member 410 of the second burner head 406, the first burner is provided. Premixing in which the surface combustion members 405 and the side surface combustion members 405a of the head 401 rise from the surface combustion members 410 and the side surface combustion members 410a, 410b and 410c of the plurality of second burner heads 406. The fire can be transferred to gas more reliably.

  A small hole is formed in each of the burner case 402 and the burner case 407 facing the side surface combustion member 410c of the side surface combustion member 405a of the first burner head 401 and the side surface combustion member 410c of the second burner head 406. Alternatively, the premixed gas may be ejected. In this case, the first burner head 401 can be surely transferred to the plurality of second burner heads 406.

  When the amount of heating to the rice cooker 300 of each surface combustion burner unit 400 in the cooking heating zone A, boiling maintenance heating zone B, and baking heating zone C is based on the heating amount in the cooking heating zone A, for example, boiling The maintenance heating zone B is approximately 80 to 90%, and the baking heating zone C is approximately 30 to 40%. In accordance with this, the combustion amount of the surface combustion burner unit 400 arranged in each zone is set. The setting of the combustion amount in the heating zone is an example, and the present invention is not limited to this.

  In the cooked heating zone A and the boiling maintenance heating zone B, immediately after the start of combustion, the surface combustion members 405 of the first burner head 401 and the surface combustion members 410 of the plurality of second burner heads 406 surface combustion, These surfaces are in a red hot state reaching approximately 850 ° C.

  After each surface combustion burner unit 400 arranged in the cooking heating zone A and the boiling maintenance heating zone B starts burning, the two second burner heads 406 of the surface combustion burner unit 400 arranged in the baking heating zone C are used. A premixed gas is supplied to ignite and burn.

  In the surface combustion burner unit 400 disposed in the baking and heating zone C, the first burner head 401, the ignition means 414, the combustion detection means 415, etc. in the block diagram showing the basic structure of the combustion system shown in FIG. In addition, the second burner head 406 has two basic configurations.

  Also in the baked and heated zone C, the motor (not shown) of the blower 501 that is the premixed gas supply means 500 is energized to supply the combustion air to the air gas mixing section 502, the premixed gas supply pipe 511, and the second burner head 406. Start supplying. Further, the supply air pressure from the branch pipe 503 to the air gas mixing unit 502 is applied to the air-fuel ratio proportional control device 505 and the supply air pressure is detected by the air flow switch 504.

  Next, when the cocks 507 and 509 are opened, the combustion gas flows into the air gas mixing unit 502 via the air-fuel ratio proportional control device 505 and the gas pipe 508, and the gas and the combustion air are mixed. Further, the premixed gas obtained by mixing the gas and the combustion air is supplied from the air gas mixing unit 502 to the plurality of second burner heads 406 via the premixed gas supply pipe 511.

  At this time, the correlation between the amount of combustion air supplied to the air gas mixing unit 502 and the supply air pressure applied from the branch pipe 503 to the air-fuel ratio proportional control device 505 is grasped, and this supply air pressure is controlled by the air-fuel ratio proportional control. The air-fuel ratio proportional control device 505 controls the amount of gas supplied to the device 505 and supplied to the air-gas mixing unit 502 so that the air-fuel ratio (air / gas mixture ratio) falls within a predetermined value range.

  The air-fuel ratio (excess air ratio) is set to 1.2 to 1.4, for example, and the combustion air amount and gas amount are set as the total primary air amount larger than the theoretical combustion air amount of gas. The amount of gas combustion in the plurality of second burner heads 406 is set by controlling the gas flow rate following the supply air pressure applied to the air-fuel ratio proportional control device 505. The change in the amount of gas combustion is performed by controlling the rotational speed of the blower 501.

  Accordingly, when the blower 501 does not rotate or reaches the specified rotation speed, no gas is supplied to the air gas mixing unit 502.

  As described above, the two second burner heads 406 are basically arranged in a V shape in an intersecting direction with an angle of θ1 as shown in FIG. The V-shaped apex portion 421 in which one end side of the long side direction of the burner head 406 is close to or in contact with each other is brought into the boiling maintenance heating zone B side (the loading opening 108 side of the rice cooker 300, the upstream in the conveying direction of the rice cooker 300). The other end side in the long side direction of the two second burner heads 406 has an angle of θ1, and the unloading opening 109 side of the rice cooker 300 (the downstream side in the conveying direction of the rice cooker 300) ) Are separated from each other.

  Further, the V-shaped apex portions of the two second burner heads 406 are located at a substantially central portion in a direction orthogonal to the conveying direction of the rice cooker 300 in the boiling maintenance heating zone B. Are arranged close to or in contact with the end (short side) in the long side direction.

  Therefore, the second burner heating zone C is arranged in the baking heating zone C from the end of the second burner head 406 located at the substantially central portion of the surface combustion burner unit 400 arranged in the boiling maintenance heating zone B which has already started combustion. The premixed gas supplied to the burner head 406 and ejected from the surface combustion member 410 can easily transfer through the V-shaped apex portion 421 and start combustion.

  The second burner head 406 located at the substantially central portion of the surface combustion burner unit 400 disposed in the boiling maintenance heating zone B by a cover 418 provided in the vicinity of the V-shaped apex of the two second burner heads 406. From the combustion flame at the end of this, the flame can be transferred more easily to the V-shaped apex 421 and combustion can be started.

  In addition, when the surface combustion burner unit 400 is provided with the ignition means 414 and the combustion detection means 415 as shown in FIG. 22, the same ignition and combustion operations as the cooked heating zone A and the boiling maintenance heating zone B are performed. Can do.

  In the baked heating zone C, as in the baked heating zone A and the boiling maintenance heating zone B, the surfaces of the plurality of second burner heads 406 are subjected to surface combustion at the surface combustion member 410 immediately after the start of combustion. It becomes a red hot state that reaches approximately 850 degrees C.

  Next, after the surface combustion burner unit 400 in the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C starts burning, the conveyor 213 is driven and the rice cooking pot 300 containing rice and cooking water is loaded. The paper is inserted from the opening 108 and the carry-in roller 222 is slid to be placed on the conveyor 213 and transport toward the carry-out opening 109 is started. The rice cooker 300 is conveyed in a continuous state in a state in which the rice cookers 300 are substantially in contact with each other.

  In the cooking and heating zone A, heating is started from the bottom surface of the rice cooker 300 entered from the carry-in opening 108, the temperature of the rice cooking water in the rice cooker 300 is raised, and heated to the boiling temperature all at once. It quickly absorbs water, swells and gelatinizes from the outside. In the rice cooker 300, rice and cooked water preheated to, for example, about 40 degrees C are accommodated.

  The rice cooker 300 that is continuously carried in from the carry-in opening 108 and is moved by the conveyor 213 is heated by the surface combustion in a red hot state of the surface combustion burner unit 400 arranged in the cooking and heating zone A. The bottom surface of the rice cooker 300 that has entered from the carry-in opening 108 is first heated by red-hot surface combustion of the first burner head 401 of the surface combustion burner unit 400.

  Since the 1st burner head 401 is arrange | positioned in the direction orthogonal to the conveyance direction of the rice cooker 300, the whole of the direction orthogonal to the conveyance direction of the rice cooker 300 is heated substantially uniformly, and temperature rises. .

  Furthermore, after the rice cooker 300 passes through the first burner head 401, the bottom surface of the rice cooker 300 continues along the conveying direction of the rice cooker 300 due to red-hot surface combustion of the plurality of second burner heads 406. The rice cooked water reaches the boiling temperature.

  Since the second burner head 406 is arranged in the direction along the conveying direction of the rice cooker 300, the bottom surface portions of the plurality of portions of the rice cooker 300 facing the second burner head 406 are concentrated and heated by radiant heat. Is done.

  When the temperature of the rice cooking water reaches, for example, 70 to 80 degrees C due to heating by surface burning in a red hot state of the plurality of second burner heads 406, as shown in FIG. 17, the rice cooking facing the second burner heads 406 is performed. A convection path in which the rice cooking water rises at the bottom surface portion of the pot 300 is formed, and a convection path in which the rising rice water drops toward the bottom portion of the rice cooking pot 300 not facing the second burner head 406 is formed. A circulation path that convects up and down is formed. The arrows in FIG. 17 indicate the flow of convection.

  Moreover, as described above, the width (W2) between the outer sides of the second burner heads 406 located on the outermost side among the plurality of second burner heads 406 in the direction along the conveying direction of the rice cooker 300 is: It is smaller than the width of the bottom surface of the rice cooker 300 in the direction orthogonal to the conveying direction, and further smaller than the width of the horizontal surface of the bottom surface of the rice cooker 300.

  Thereby, the convection path | route which descend | falls toward the bottom face part of the rice cooking pot 300 can be reliably formed along each side wall inner surface part of the rice cooking pot 300 in the both sides of the conveyance direction of the rice cooking pot 300.

  Furthermore, the width (W4) between the plurality of second burner heads 406 is set such that a circulation path that convects vertically between the plurality of second burner heads 406 is formed without a gap. Moreover, the width | variety (W3) of the some 2nd burner head 406 is set so that the rising convection path | route where rice cooking water reaches an upper surface may be formed reliably.

  The width (W4) between the second burner heads 406 forms a stable convection path so that the convection paths descending toward the bottom surface of the rice cooker 300 interfere with each other and are not disturbed, and vertically It is set so as to eliminate a region causing a temperature drop without forming a convection circulation path.

  The number and width (W3) of the plurality of second burner heads 406 and the width (W4) between the second burner heads 406 ensure that the above-described vertical convection circulation path is formed without gaps, and the rice cooker 300 It is set so that the amount of heating of the bottom surface portion becomes the maximum. Thereby, the upper-lower temperature difference of the rice cooking water in the rice cooking pot 300 can be eliminated.

  The soaked rice accelerates water absorption from 70 to 80 degrees C, and promotes swelling and gelatinization. By eliminating the temperature difference between the upper and lower sides of the rice cooking water in the rice cooker 300, the swelling and gelatinization can be performed in the vertical direction. And uniform cooked rice with no variation can be obtained.

  In addition, the length of the 2nd burner head 406 parallel to the conveyance direction of the rice cooker 300 of the 2nd burner head 406 is the moving speed of the rice cooker 300 in the cooking heating zone A, and the necessity to the rice cooker 300 as a whole. Set according to the amount of heating.

  In the present embodiment, as an example, the width (W3) of the second burner head 406 is approximately 30 mm. The width (W4) between the second burner heads 406 is approximately 79 mm. As a result, the cooked rice circulation path that convects up and down as described above can be reliably formed without any gaps, and a uniform cooked rice with no variation can be obtained with the heating amount of the bottom portion of the rice cooker 300 being maximized.

  In the cooking and heating zone A, the temperature of the rice cooking water in the rice cooking pot 300 is raised and heated to the boiling temperature at once, and then the rice cooking pot 300 moves to the boiling maintenance heating zone B.

  The surface combustion burner unit 400 arranged in the boiling maintenance heating zone B has the same configuration as the surface combustion burner unit 400 arranged in the cooking and heating zone A.

  In the boiling maintenance heating zone B, the temperature of the rice cooking water in the rice cooker 300 that has risen to the boiling temperature is maintained at the boiling temperature. During this time, the swelling and gelatinization of rice are further promoted.

  Further, in the boiling maintenance heating zone B, as long as a predetermined amount or more of rice cooking water is present in the rice cooker 300, an effective circulation path that convects up and down as well as the cooking heating zone A is formed without any gaps. Swelling and gelatinization can be further promoted.

  The rice cooker 300 moved to the boiling maintenance heating zone B is again brought into the conveying direction of the rice cooking pot 300 by the first burner head 401 arranged in a direction orthogonal to the conveying direction of the rice cooking pot 300 in the boiling maintenance heating zone B. The entire orthogonal direction can be heated almost uniformly.

  As a result, the rice cooker 300 is heated by the red-hot surface combustion of the first burner head 401 in the circulation path that is convectively formed vertically by the second burner head 406 in the cooking heating zone A without gaps. Furthermore, the temperature of the rice cooking water of the rice cooking pot 300 can be heated more uniformly by adding convection in a direction orthogonal to the conveying direction.

  By the movement of the rice cooker 300, the bottom portion of the rice cooker 300 is heated again from the first burner head 401 by the plurality of second burner heads 406. Like the second burner head 406 in the cooking and heating zone A, a plurality of second burner heads 406 form a circulation path that convects vertically in the rice cooker 300 without any gaps, Gelatinization can be further promoted.

  In particular, since the plurality of second burner heads 406 are arranged on the same line as the second burner head 406 in the cooking and heating zone A, the rice burner 300 that has passed through the first burner head 401 quickly Thus, a circulation path that convects in the vertical direction can be reliably formed without a gap.

  In the boiling maintenance heating zone B, after cooking rice while maintaining the boiling temperature of the rice cooking water, the rice cooker 300 moves to the baking heating zone C, and a plurality of second burner heads 406 arranged in a V shape as described above. The remaining water in the inner surface portion of the rice cooker 300 is completely evaporated by heating to make the rice steamed.

  In this baked heating zone C, the water in the inner surface of the rice cooker 300 is completely removed, and the portion in contact with the bottom of the rice cooker 300 is heated to a light blue color (not burned). It can be made into delicious cooked rice.

  In the baking and heating zone C, after the residual water is completely evaporated, the rice cooker 300 is taken out from the carry-out opening 109, conveyed to a steaming zone without heating by a burner, which is the next step, and left for a predetermined time.

  In the cooked heating zone A and the boiling maintenance heating zone B, the surfaces of the surface burner 405 of the first burner head 401 and the surface combustion members 410 of the plurality of second burner heads 406 are substantially burned. The bottom surface of the rice cooker 300 is heated in a red hot state reaching 850 degrees C.

  Further, in the cooking heating zone A and the boiling maintenance heating zone B, the surface combustion member 410 of the plurality of second burner heads 406 serving as the main heating source is brought into a red hot state reaching approximately 850 degrees C. Compared to the blue combustion flame, most of the heat of combustion can be converted into radiant heat by infrared rays, and the bottom surface of the rice cooker 300 can be heated strongly.

  Further, by arranging the distance between the bottom surface of the rice cooker 300 and the surface combustion member 410 close to each other, and arranging the plurality of second burner heads 406 in parallel with the conveying direction of the rice cooker 300, The same part of the rice cooker 300 moving in the cooked heating zone A and the boiling maintenance heating zone B can be continuously heated.

  By these, in the cooking heating zone A and the boiling maintenance heating zone B, the bottom part of the rice cooker 300 where the surface combustion member 410 is located is concentratedly heated by radiant heat to form a strong convection path that rises up to the upper surface. Can do. Therefore, it is possible to reliably form a circulation path that convects vertically in the rice cooker 300 without any gaps, thereby further promoting the swelling and gelatinization of rice.

  Furthermore, the distance between the bottom surface of the rice cooker 300 and the surface combustion member 410 is, for example, approximately 30 mm in the cooking heating zone A and 35 to 45 mm in the boiling maintenance heating zone B. That is, the distance between the bottom surface of the rice cooker 300 on the cooked heating zone A side and the surface combustion member 410 is set smaller than the boiling maintenance heating zone B.

  That is, by setting the distance between the bottom surface of the rice cooker 300 and the surface combustion member 410 in the cooked heating zone A rather than the boiling maintenance heating zone B, a hot red heat state on the bottom surface of the rice cooker 300 is achieved. The temperature up to the boiling temperature of the rice cooker 300 itself and the cooked water in the rice cooker 300 due to the action of increasing the ratio of the radiant heat component from the surface combustion member 410 and the combustion exhaust gas flowing in close contact with the bottom surface of the rice cooker 300 The rising speed can be made faster. Therefore, the heating which concentrated on the bottom face of the rice cooking pot 300 can be performed effectively, and the rice cooking speed can be improved as the whole continuous rice cooking apparatus.

  In addition, as shown in FIG. 17, a convection path in which rice cooking water and rice rise is formed at the bottom surface of the rice cooker 300 facing the second burner head 406, and the rising rice cooking water and rice are the second burner head. A convection path that descends toward the bottom surface of the rice cooker 300 that does not face 406 can be reliably formed, and a circulation path that convects up and down can be more strongly formed. Therefore, it is possible to more reliably form a circulation path that convects up and down in the rice cooker 300 without any gaps, thereby further promoting the swelling and pasting of rice.

  Further, in the boiling maintenance heating zone B, by setting the distance between the bottom surface of the rice cooker 300 and the surface combustion member 410 to be slightly larger than the cooked heating zone A, the rice cooked with the decrease in moisture in the rice cooker 300 is set. The boiling temperature can be maintained while preventing local charring, and good cooking can be performed.

  Further, as described above, the surface combustion members 410 of the plurality of second burner heads 406 are burned in a red-hot state where the surface portions reach approximately 850 degrees C. However, as shown in FIG. A columnar blue flame 416 may be formed and mixed in a part of 410 to form a combustion state.

  The blue flame 416 is formed by, for example, partially increasing the diameter of a large number of small holes 408 provided in the burner case 407, and setting a larger amount of premixed gas to be ejected from the small holes 408. This can be realized by increasing the combustion load of the surface combustion member 410 located on the hole 408.

  The blue flame 416 is formed on the surface combustion member 410, but the surface combustion member 410 without the blue flame 416 maintains stable combustion without blowing off due to a flame holding effect by burning in a red hot state. The first burner head 401 can be similarly implemented.

  Further, since the blue flame 416 is a premixed gas in which all the primary air is mixed, it can be completely burned without the presence of secondary air.

  The tip of the blue flame 416 reaches the vicinity of the bottom surface of the rice cooker 300. In addition to heating the bottom surface of the rice cooker 300 with radiant heat due to the red heat state of the surface combustion member 410, the rice cooker 300 is further efficiently heated by the direct heating action of the bottom surface of the rice cooker 300 by the blue flame 416. Can do.

  Further, in the cooking and heating zone A, the first burner head 401 arranged in the direction orthogonal to the conveying direction of the rice cooker 300 is positioned on the carry-in opening 108 side, whereby the carry-in opening 108 has a first portion. A curtain flame due to the combustion flame in the burner head 401 and this exhaust gas is generated, and cold air can be prevented from entering the tunnel-shaped heating chamber 302 from the carry-in opening 108, and the rice cooker 300 can be heated more efficiently. Furthermore, combustion can be stabilized.

  Tunnel-shaped heating from the carry-in opening 108 to the carry-out opening 109 of the rice cooker 300 in a space surrounded by the bottom and side surfaces of the rice cooker 300 having the lid 301, the vertical wall portion 215, and the surface combustion burner unit 400 using heat-resistant metal fibers. Although the chamber 302 is constituted, the heat reflecting plate 412 constituting the surface combustion burner unit 400 and the inner case 217 constituting the vertical wall portion 215 re-reflect the radiant heat to the bottom surface and the side surface of the rice cooker 300 for more efficiency. Thus, the rice cooker 300 can be heated.

  Further, by providing a heat insulating material 413 between the unit case 411 and the heat reflecting plate 412, and further providing a heat insulating material 413 between the outer case 216 and the inner case 217 constituting the vertical wall portion 215, it is possible to further increase the temperature. A heat shield effect is produced, and the rice cooker 300 can be heated more efficiently.

  As described above, in the boiling maintenance heating zone B, after cooking while maintaining the boiling temperature of the cooked water, the rice cooker 300 moves to the baking heating zone C, where a plurality of V-shaped as described above are arranged. The second rice burner head 406 is used to heat the rice cooker 300 while maintaining it at approximately 100 degrees C, thereby reducing the entire rice cooker 300, partial overheating of the lid 301, and the temperature difference. And the remaining water on the inner surface of the lid 301 is completely evaporated to make the rice steamed.

  In the cooking heating zone A and the boiling maintenance heating zone B, a plurality of second burner heads 406 are arranged on the same line in parallel with the conveying direction of the rice cooker 300, and the same portion at the bottom of the moving rice cooker 300 is arranged. A circulation path that continuously heats and convects in the vertical direction in the rice cooker 300 is formed without gaps.

  Therefore, in the cooked heating zone A and the boiling maintenance heating zone B, as a whole of the bottom of the rice cooker 300, there is a temperature difference between the bottom facing the second burner head 406 and the bottom not facing. Will be. Moreover, the temperature of the bottom part of the rice cooker 300 is higher than the side part of the rice cooker 300 and the lid 301.

  Under the above heating and temperature conditions, the rice cooker 300 that has entered the baking heating zone C from the boiling maintenance heating zone B is heated by the two second burner heads 406 arranged in a V shape while moving. The The two second burner heads 406 are arranged in a V shape, and the rice cooker 300 is moved over the second burner heads 406, whereby the heating position (heating part) of the bottom of the rice cooker 300 by the second burner head 406 is changed to rice cooking. It changes sequentially from the central portion of the hook 300 toward the outside.

  Further, the V-shaped apex portion 421 in which one end sides in the long side direction of the two second burner heads 406 are close to or in contact with each other, and the long sides of the two second burner heads 406 are formed. The other end side of the direction has an angle of θ1 and is positioned so as to spread away from each other toward the carry-out opening 109 side of the rice cooker 300 (downstream side in the conveying direction of the rice cooker 300).

  As a result, the second burner head 406 continuously changes the heating position (heating part) over almost the entire region in the direction orthogonal to the conveying direction of the rice cooker 300, and the uniform heating condition is changed from local heating. The bottom of the cooked rice cooker 300 can be brought to a uniform temperature.

  Further, the combustion exhaust gas of the second burner head 406 flows into each triangular non-heated area 420 formed outside the two V-shaped second burner heads 406, and further, cooked rice from the non-heated area 420. It flows to the bottom part and the side part of the hook 300, and the cover 301 part, and these temperatures can be made uniform.

  In addition, the combustion exhaust gas of the second burner head 406 flows into the triangular non-heating area 419 formed inside the two V-shaped second burner heads 406, while contacting the bottom of the rice cooker 300. By flowing along this and making it flow to the exit side of the rice cooking pot 300, the temperature of this bottom part can be equalize | homogenized.

  Like these, simultaneously with the continuous change of the heating position (heating part) of the bottom part of the rice cooker 300 toward the outward from the center part of the rice cooker 300, the area of the triangular non-heating areas 419 and 420 is increased. By causing the continuous change, the entire rice cooker 300 and the lid 301 entering the baked heating zone C from the boiling maintenance heating zone B can be brought to a uniform temperature without partial overheating.

  Further, openings 411a and 411b are formed in the non-heating areas 419 and 420, and convection air is mixed into the combustion exhaust gas through the openings 411a and 411b, thereby adjusting the temperature of the combustion exhaust gas and the bottom of the rice cooker 300. Thus, the entire rice cooker 300 and the lid 301 can be set to optimum heating conditions.

  As described above, in the cooking heating zone A and the boiling maintenance heating zone B, the plurality of second burner heads 406 are arranged on the same line in parallel with the conveying direction of the rice cooker 300 and moved. The same part of the bottom is continuously heated to reliably form a circulation path for convection in the rice cooker 300 without any gaps. As a result, a circulation path that convects in the vertical direction in the rice cooker 300 is surely formed without gaps, further promoting the swelling and gelatinization of the rice. In the baked heating zone C, the rice cooker 300 is brought to about 100 degrees C. While maintaining, heat the rice cooker 300, partially overheat the lid 301, and reduce the temperature difference to completely evaporate the remaining water on the inner surface of the rice cooker 300 and the inner surface of the lid 301, thereby It can be in a steamed state.

  Accordingly, it is possible to provide a continuous rice cooking apparatus that can improve the heating efficiency and shorten the heating time and can realize good rice cooking.

  In addition, in one continuous rice cooker, in order to increase the amount of rice cooked per unit time by speeding up the conveyor 213 of the rice cooker 300, the surface combustion burner disposed in the cooking heating zone A and the boiling maintenance heating zone B, respectively. The number of units is increased, or the length of the long side direction of the plurality of second burner heads 406 is lengthened. Further, in the baking and heating zone C, as shown in FIGS. The length of the second burner head 406 configured can be lengthened to adjust the rice cooking time as a whole, and can be realized arbitrarily.

  Next, the operation and operation of another embodiment of the surface combustion burner unit 400 will be described with reference to FIGS.

  In the configuration shown in FIG. 23, a plurality of second burner heads 406a and 406b are arranged in both comb teeth in contact with or close to both sides of the first burner head 401.

  Also in this structure, it has the same effect | action and effect as the surface combustion burner unit 400 shown in FIG. Furthermore, the surface-combustion burner unit 400 having a single comb tooth shape shown in FIG. 11 may be arranged in combination so that the first burner head 401 is located on the carry-in opening 108 side of the rice cooker 300. It can be configured corresponding to.

  24, which is another embodiment of the surface combustion burner unit 400, has a width (W3) in the short side direction of the second burner head 406 from the cooking heating zone A to the boiling maintenance heating zone B. The size is made smaller. Thereby, the adjustment of the heating amount to the rice cooker 300 of each surface combustion burner unit 400 in the cooking heating zone A and the boiling maintenance heating zone B can be set more finely.

  25, which is another embodiment of the surface combustion burner unit 400, includes a plurality of second burner heads substantially parallel to the rice cooker 300 conveyance direction from the cooking heating zone A to the boiling maintenance heating zone B. The length of a part of the long side direction 406 (direction parallel to the conveying direction of the rice cooker 300) is sequentially shortened. Thereby, the adjustment of the heating amount to the rice cooker 300 of each surface combustion burner unit 400 in the cooking heating zone A and the boiling maintenance heating zone B can be set more finely.

  26, which is another embodiment of the surface combustion burner unit 400, is obtained by sequentially reducing the number of the second burner heads 406 from the cooking heating zone A to the boiling maintenance heating zone B. is there. Thereby, the adjustment of the heating amount to the rice cooker 300 of each surface combustion burner unit 400 in the cooking heating zone A and the boiling maintenance heating zone B can be set more finely.

  Further, the configurations shown in FIGS. 8, 11, 19 to 22, and 23 to 26 can be arbitrarily combined, and the rice cooker 300 can be effectively heated, and the cooked heating zone A and boiling Adjustment of the amount of heating to the rice cooker 300 of each surface combustion burner unit 400 in the maintenance heating zone B and the baking heating zone C can be set more finely.

  Next, the overall configuration of the continuous rice cooker will be further described. From the carry-in opening 108 of the rice cooker 300 to the space surrounded by the bottom and side surfaces of the rice cooker 300 to be continuously conveyed, the vertical wall portions 215 located on both sides in the conveying direction of the rice cooker 300, and the surface combustion burner unit 400 A tunnel-like heating chamber 302 is formed over the carry-out opening 109, and a plurality of rice cookers 300 in contact with each other are located in the tunnel-like heating chamber 302 extending from the carry-in opening 108 to the carry-out opening 109.

  Exhaust gas that has been surface-combusted in the surface combustion burner unit 400 disposed in the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C constitutes a tunnel-like heating chamber 302, and both sides in the conveying direction of the rice cooker 300 From the opening 220 provided in the inner case 217 of the vertical wall portion 215 located at the center, the exhaust duct 221 is led out through the exhaust gas passage 218 of the heat insulating material 219.

  The vertical wall portions 215 on both sides are provided separately for each surface combustion burner unit 400 disposed in the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C.

  The flow from the tunnel-shaped heating chamber 302 of the exhaust gas surface-combusted in each surface combustion burner unit 400 is collected from the gap between the chain-shaped conveyor 213 itself and the flange mounting portion of the rice cooker 300 on the conveyor 213. It is led out to the exhaust duct 221 through the path leading to the space 225, the opening 220 of the vertical wall portion 215 located on both sides in the conveying direction of the rice cooker 300, and the exhaust gas passage 218, and discharged into the air passage 207. The air flows in a manner divided into a path that reaches the exhaust gas collecting space 225 by mixing with the rising air.

  The gap between the chain-shaped conveyor 213 itself, the path from the mounting portion of the flange of the rice cooker 300 to the conveyor 213 to the exhaust gas collecting space 225 has a small opening portion through which exhaust gas flows, and most of the exhaust gas is a vertical wall It flows through the opening 220 of the portion 215 and the exhaust gas passage 218 to the exhaust duct 221 by a draft action. Therefore, most of the exhaust gas flows on both sides in the direction orthogonal to the conveying direction of the rice cooker 300.

  By providing the damper 221a in the exhaust duct 221, the amount of exhaust gas led out from the heating chamber 302 and the pressure in the heating chamber 302 can be adjusted.

  It flows into the air exhaust gas passage 211 from the opening at the upper end of the exhaust duct 221 and mixes with convection air from below to enter the exhaust gas collecting space 225. Exhaust gas from the clearance between the chain-shaped conveyor 213 itself and the flange mounting portion of the rice cooker 300 on the conveyor 213 also enters the exhaust gas collecting space 225, and the exhaust gas of both enters the exhaust tube 212 from the exhaust gas collecting space 225. Is exhausted outside the main unit.

  The exhaust gas exhausted outside the main body by the exhaust pipes 212 arranged in the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C is a hood that collects the exhaust gas from each exhaust pipe 212 ( The hood is collected outside and is discharged to the outdoors through an exhaust pipe (not shown).

  The pressure in the heating chamber 302 rises due to the volume of exhaust gas generated by surface combustion generated in the tunnel-shaped heating chamber 302. In the case of only the discharge path from the clearance between the conveyor 213 itself and the flange mounting portion of the rice cooker 300 to the exhaust gas collecting space 225, the pressure in the heating chamber 302 is higher than the pressure outside the continuous rice cooker. And the exhaust gas flows out from the carry-in opening 108 and the carry-out opening 109.

  As described above, when the exhaust gas flows out from the carry-in opening 108, the carry-in opening 108 side, which is a relatively low-temperature work area for handling the rice cooker 300 before heating, tends to become high temperature, which is not preferable for the operator. The indoor air conditioning load including the exhaust gas flowing out from the carry-out opening 109 increases, which is not preferable.

  On the other hand, most of the exhaust gas flows into the exhaust duct 221 through the opening 220 of the vertical wall portion 215 and the exhaust gas passage 218, thereby reducing the pressure in the heating chamber 302 and bringing in the carry-in opening. 108, it is possible to suppress the outflow of exhaust gas from the carry-out opening 109, improve the working environment, and reduce the indoor air conditioning load.

  By providing the damper 221 a in the exhaust duct 221, the amount of exhaust gas led out from the heating chamber 302 can be increased or decreased, and the pressure in the heating chamber 302 can be adjusted to an optimum condition.

  Further, the heating chamber 302 communicates with the cooked heating zone A, the boiling maintenance heating zone B, and the baked heating zone C, and further, the amount of exhaust gas generated with different amounts of gas combustion in each zone. By being different, a pressure difference is generated in the heating chamber 302, and the exhaust gas in the heating chamber 302 easily flows in the conveying direction of the rice cooker 300. This causes a variation in the amount of heating of the rice cooker 300 in the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C, which is not preferable.

  On the other hand, by arranging the vertical wall portion 215, the opening 220, and the exhaust duct 221 on both sides of the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C, the exhaust gas is Most of the gas flows on both sides in the direction orthogonal to the conveying direction of the rice cooker 300, and the exhaust gas in the heating chamber 302 can be suppressed from flowing in the conveying direction of the rice cooker 300. Therefore, it is possible to obtain homogeneous cooked rice by stabilizing the combustion in the cooked heating zone A, the boiling maintenance heating zone B, and the cooked heating zone C and stabilizing the heating amount of the rice cooker 300.

  Further, most of the exhaust gas flows on both sides in the direction orthogonal to the conveying direction of the rice cooker 300, whereby the side surface of the rice cooker 300 is also heated, and the heating efficiency can be increased.

  Further, in the exhaust gas collecting space 225, the water heat exchanger 224 positioned here can be heated with the exhaust gas to preheat the cooked rice water so that the exhaust gas heat can be used effectively. Note that the exhaust gas emitted from the exhaust duct 221 can be supplied to a steaming chamber or the like, which is a subsequent process of the baking and heating zone C, to effectively use the exhaust gas heat.

  The size, number, and the like of the opening 220 of the vertical wall portion 215 are not limited to those of the embodiment, and the setting of the combustion amount in the cooking heating zone A, the boiling maintenance heating zone B, and the baking heating zone C, the exhaust pipe 212 The optimum condition may be set according to the difference in drafts.

  The exhaust gas may be forcibly sucked from the opening 220 of the vertical wall portion 215 by a blower or the like. In this case, for example, the amount of exhaust gas sucked can be adjusted by the rotational speed of the blower and the suction damper.

  In the embodiment, the vertical wall portion 215 is formed in a box shape by the outer case 216 and the inner case 217, and the heat insulating material 219 is held inside. Furthermore, the rice cooker 300 side of the inner case 217 has a function as a heat reflecting plate, thereby suppressing heat dissipation from the heating chamber 302 to the outside and heating the rice cooker 300 more efficiently. At the same time, the temperature rise of the inner member and the outer member can be suppressed.

  Similarly, the unit case 411, the heat reflecting plate 412, and the heat insulating material 413 constituting the surface combustion burner unit 400 are used to suppress heat radiation from the heating chamber 302 to the outside, thereby heating the rice cooker 300 more efficiently. In addition, the temperature rise of the inner shell member and the outer member can be suppressed.

  In addition, on both sides of the heating chamber 302 and the exhaust gas collecting space 225, the main body is provided by heat insulation by the partition walls 201, 202, 205, 206, and 209 and the air flow rising through the air passages 203, 204, 207 and 208 The temperature rise on the outer surface of the outer shell 100 can be suppressed, and the working environment can be improved.

  The present invention can be applied not only to cooking rice but also to cooking of other heated objects.

DESCRIPTION OF SYMBOLS 100 Main body outer part 101 Frame member 101a Burner fixing member 102 Leg 103 Front lower case 103a Opening 103b Opening 104 Side lower case 105 Front intermediate case 106 Top plate case 106a Opening 107 Side top plate case 108 Carrying opening 109 Carrying out opening 200 Main body outline Part 201 Partition wall 202 Partition wall 203 Air passage 204 Air passage 205 Partition wall 206 Partition wall 207 Air passage 208 Air passage 209 Partition wall 210 Partition wall 211 Air exhaust gas passage 212 Exhaust cylinder 213 Conveyor (conveying means)
214 Conveyor Support 215 Vertical Wall 216 Outer Case 217 Inner Case 218 Exhaust Gas Passage 219 Heat Insulating Material 220 Opening 221 Exhaust Duct 221a Damper (Exhaust Gas Derived Amount Adjustment Means)
222 carry-in roller 223 carry-out roller 224 water heat exchanger 225 exhaust gas collecting space 300 rice cooker 301 lid 302 heating chamber 400 surface combustion burner unit (heating burner, heating means)
401 First burner head 402 Burner case 402a Long side surface 402b Short side surface 403 Small hole 404 Connection tube 405 Surface combustion member (metal knit, metal fiber)
405a Side surface combustion member (metal knit, metal fiber)
406 Second burner head 406a Second burner head 406b Second burner head 407 Burner case 407a Long side surface 407b Short side surface 408 Small hole 409 Connection pipe 410 Surface combustion member (metal knit, metal fiber)
410a Side surface combustion member (metal knit, metal fiber)
410b Side surface combustion member (metal knit, metal fiber)
410c Side surface combustion member (metal knit, metal fiber)
411 unit case 411a opening 411b opening 412 heat reflecting plate 412a opening 413 heat insulating material 414 spark bar (ignition means)
414a Igniter 415 Flame rod (combustion detection means)
415a DC application power source 416 Blue flame 417 Step 418 Cover 419 Non-heating area 420 Non-heating area 421 Apex section 500 Premixed gas supply means 501 Blower 502 Air gas mixing section 503 Branch pipe 504 Air flow switch 505 Air-fuel ratio proportional control device 506 Gas Pipe 507 Cock 508 Gas pipe 509 Cock 510 Premixed gas supply pipe 511 Premixed gas supply pipe 512 Flow control valve

Claims (7)

The rice cooker has a conveying means for continuously conveying a rice cooker containing rice and rice water in one direction, and a heating burner arranged with a space below the rice cooker conveyed by the conveying means. A continuous rice cooking apparatus equipped with a heating zone, a boiling maintenance heating zone, and a baking heating zone sequentially in the conveying direction of
In each of the cooked heating zone and the boiling maintenance heating zone, a rectangular burner head for burning all primary air premixed gas in a red hot state by a surface combustion member using a heat-resistant metal fiber is used. The surface combustion burner unit is configured and arranged with a plurality of burner heads arranged at intervals in the direction substantially perpendicular to the conveying direction of the rice cooker with the long side of the rice cooker being substantially parallel to the conveying direction of the rice cooker,
In the baked heating zone, two rectangular burner heads having substantially the same length in the long side direction in which all primary air premixed gas is burned in a red hot state by a surface combustion member using the heat-resistant metal fibers are predetermined. The surface combustion burner unit is disposed in the cooked heating zone, the boiling maintenance heating zone, and the baked heating zone. A continuous rice cooking apparatus comprising premixed gas supply means for supplying a total primary air premixed gas for each of them.   An ignition means for igniting all primary air premixed gas ejected from the burner head to start combustion in each of the surface combustion burner units arranged in the cooking heating zone, boiling maintenance heating zone, and baking heating zone, and the ignition means A continuous rice cooking apparatus according to claim 1, further comprising combustion detection means for detecting a combustion flame that has been ignited and started combustion.   The surface combustion burner unit disposed in the baked heating zone has two rectangular burner heads which form apexes by bringing one end side in the long side direction close to or in contact with each other, and the two rectangular burner heads. The other end side of the long side direction of the rice cooker is positioned so as to spread away from each other along the conveying direction of the rice cooker, and the apex portion is an odd number of boiling maintenance heating zones among the burner head and the conveying direction of the rice cooker Arranged in close proximity to or in contact with the end in the long side direction of the burner head located substantially in the center of the orthogonal direction, the other end side in the long side direction of the two rectangular burner heads At the same time as the continuous change in the area of the non-heating area of the triangular shape without heating action formed on both the outside and inside of the V-shaped rectangular burner head, which is spread out to the position outside the bottom horizontal part The middle of the rice cooker Continuous rice cooking system according to claim 1 or 2 outward; and heating while continuously changing the heating position of the bottom of the cooking pot minutes.   Corresponding to the increase in the number of surface combustion burner units arranged in each of the cooking heating zone and the boiling maintenance heating zone, the length of the long side direction of the two rectangular burner heads in the baking heating zone is increased, and The continuous rice cooker according to any one of claims 1 to 3, wherein the predetermined angle (θ) is set to be small.   5. Each of the two rectangular burner heads constituting the V-shape is configured by connecting a plurality of rectangular burner heads in a row. 5. Continuous rice cooker.   The continuous rice cooker according to any one of claims 1 to 5, wherein the burner head disposed in the baking heating zone is a rectangular burner head disposed in the boiling maintenance heating zone.   The continuous rice cooker according to any one of claims 1 to 6, wherein an opening for introducing air is provided in a non-heated area formed in the baking heating zone.