JP2005069641A - Surface burning burner and heating cooker using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface burning burner capable of uniformly and properly cooking rice, and a heating cooker and a heating cooker system using the surface burning burner. <P>SOLUTION: The surface burning burner comprises a plurality of elongated burner plates, each surface of which serves as a burning face, radially arranged from the center of the burner, wherein total area of the burning face per unit length in a radial direction of the plurality of burner plates increases from the burner center toward the outside in the radial direction. The heating cooker and the heating cooker system using the surface burning burner are also provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a surface combustion burner and a heating cooking apparatus using the same, and more specifically, for example, a surface combustion burner capable of efficiently performing cooking such as rice cooking without unevenness and cooking using the same. It is a device.

  For example, as disclosed in Patent Document 1, a surface combustion burner supplies a combustion gas mixture in which air and fuel gas are mixed in advance from the back surface of a planar porous member such as ceramics, and the combustion gas mixing is performed. The body is diffused and reaches the front surface of the flat porous member, and is ignited and combusted in the vicinity of the front surface, for the reason that it is safe and highly efficient, including a household combustor machine, It is used in a wide range.

  In patent document 2, the rice cooking apparatus which uses such a surface combustion burner is proposed. This rice cooker has a surface combustion burner arranged at the bottom of the furnace that houses the rice cooker. As shown in FIG. 10, a plurality of burner plates 103 whose surfaces serve as combustion surfaces are arranged at the center of the bottom of the furnace body 101. It is said that the shape of each burner plate 103 should be wide at the center and narrow toward the front end because the heat distribution to the rice cooker is uniform. Yes.

  However, when rice is cooked with a rice cooker in which a surface combustion burner having a shape as disclosed in Patent Document 2 is disposed, uneven rice cooking often occurs, and rice cooking may be insufficient or excessive. Experienced. This is described in Patent Document 2 in the case of a surface combustion burner in which a portion close to the center as disclosed in Patent Document 2 is wide, and narrower burner plates are radially arranged toward the tip side. On the contrary, the central part of the bottom of the rice cooker has the strongest heating power, and the heating power becomes weaker as it goes to the outside, resulting in insufficient heating near the side of the rice cooking pot and uneven rice cooking. It is done.

In particular, according to the present inventors confirmed, in the surface combustion burner of the shape as disclosed in Patent Document 2, the thermal power is concentrated in the center of the rice cooker, and the bottom of the rice cooker is overheated, There was a phenomenon that the bottom of the rice cooker was deformed. Usually, the temperature sensor contacts the bottom of the rice cooker, and the signal from the temperature sensor is used to determine the end of rice cooking, so if the bottom of the rice cooker is deformed, contact with the temperature sensor is insufficient. Therefore, the temperature measurement at the bottom of the rice cooker is not accurately performed. For this reason, it turned out that cooking rice excess and cooking rice shortage have arisen. Such a phenomenon was originally found by the present inventors.
JP-A-5-172314 JP 2001-224499 A

  The present invention was made in order to solve the problems of the conventional rice cooking apparatus using the surface combustion burner as described above, and provides a surface combustion burner capable of performing good rice cooking without uneven rice cooking. In addition, an object of the present invention is to provide a cooking device and a cooking system using such a surface combustion burner.

  In the present invention, a plurality of long burner plates whose surfaces serve as combustion surfaces are arranged radially from the center of the burner, and the combustion surface per unit length in the radial direction of the plurality of burner plates is provided. By providing a surface combustion burner whose total area tends to increase radially outward from the center of the burner, and a cooking device and cooking system using such a surface combustion burner, It solves the problem.

  According to the surface combustion burner of the present invention, the total value of the areas of the combustion surfaces per unit length in the radial direction of the plurality of radially arranged burner plates increases from the burner center to the radially outer side. Therefore, as the area to be heated increases from the center of the surface combustion burner to the outside in the radial direction, the combustion area also increases. For example, the amount of heat for heating a cooking vessel such as a rice cooker increases. There is an advantage that uniformity is achieved. Moreover, since the heating cooking apparatus using such a surface combustion burner of the present invention is intended to equalize the amount of heating heat with respect to the cooking container, it can efficiently perform cooking without unevenness, Since the central part of the bottom of the cooking container is not deformed by overheating, there is an advantage that the temperature of the central part of the cooking container can be accurately measured by contacting the temperature sensor. And the heat cooking system incorporating a plurality of such heat cooking devices has an excellent feature that heat cooking without unevenness can be performed accurately and efficiently.

  Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited to the illustrated one.

  FIG. 1 is a plan view showing an example of a surface combustion burner according to the present invention, where 1 is a surface combustion burner and eight long burners arranged radially from the center of the surface combustion burner 1 toward the outside. It consists of plates 2a to 2h. The burner plates 2a to 2h burn the fuel mixed gas of air and fuel gas on the surface thereof to become a flame holder for the surface burning burner, and can burn the fuel mixed gas on the surface. As long as there are no particular restrictions on the constituent materials, for example, porous ceramics, ceramic fibers, metal fibers, heat-resistant metal fiber knitted fabric (metal knit), a laminate of a heat-resistant metal fiber knitted fabric and a metal porous plate And so on.

  At the center of the surface combustion burner 1, there is a gap where the burner plates 2a to 2h do not exist, and for example, a temperature sensor can be arranged there. Although not shown, the surface combustion burner 1 has a fuel gas mixture obtained by mixing a fuel gas such as city gas and air in a predetermined ratio with each burner plate 2a to 2h at a predetermined pressure. A fuel gas mixture supply pipe to be supplied, an ignition device, and the like are attached.

  As shown in FIG. 1, in the surface combustion burner 1 of this example, the burner plates 2 a to 2 h have the same shape and gradually become wider from the center of the surface combustion burner 1 toward the outside in the radial direction. For this reason, for example, in the explanatory view shown in FIG. 2, the areas of the combustion surfaces of the burner plates 2a to 2h per unit length D at the position of the innermost P are Pa to Ph, respectively, and Q at the center in the radial direction is set. The area of the combustion surface of the burner plates 2a to 2h per unit length D at the position of Q is Qa to Qh, respectively, and the combustion surface of the burner plates 2a to 2h per unit length D at the position R of the outermost radial direction Is the total value of the areas of the combustion surfaces of the burner plates 2a to 2h per unit length D at the position P, that is, sumP = (Pa + Pb + Pc + Pd + Pe + Pf + Pg + Ph). The total value of the area of the combustion surface per unit length D at the position of Q, that is, sumQ = (Qa + Qb + Qc + Qd + Q + Qf + Qg + Qh) is larger, and furthermore, the total value of the area of the combustion surface per unit length D at the R position radially outward than sumQ, that is, sumR = (Ra + Rb + Rc + Rd + Re + Rf + Rg + Rh) is larger. Yes.

  In the example shown in FIGS. 1 and 2, the burner plates 2 a to 2 h have the same shape and gradually increase in width radially outward from the center of the surface combustion burner 1. The total area of the combustion surfaces of the burner plates 2a to 2h per length increases continuously toward the outside in the radial direction, but the combustion surface of the burner plates 2a to 2h per radial unit length. The total value of the areas does not necessarily have to be continuously increased toward the outside in the radial direction, and for example, as shown in FIG. 3, it may be increased stepwise with S, T, U. . Further, on the way from the central portion of the surface combustion burner 1 to the outside in the radial direction, the total value of the areas of the combustion surfaces of the burner plates 2a to 2h per radial unit length once decreases, for example, as shown in FIG. In addition, the total value of the area of the combustion surface may be zero, that is, there may be a portion V where the burner plate does not exist. In short, it is sufficient that the total area of the combustion surfaces of the burner plates 2a to 2h per unit length in the radial direction has a tendency to increase toward the outside in the radial direction, but as shown in FIG. Most preferably, it increases continuously as it goes outward in the direction.

  Moreover, in the above illustrated example, the number of the burner plates 2a to 2h arranged radially is eight, but the number of burner plates is not limited to eight. Three, four, five, six, or nine or more may be used, but it is desirable that they are arranged evenly in a radial pattern. The shapes of the burner plates 2a to 2h are not necessarily all the same size and the same shape, but in order to achieve a uniform heating state, it is desirable that all the shapes are the same and the same shape.

  FIG. 5 is a cross-sectional view showing an example of a rice cooking device 4 as a heating cooking device using the surface combustion burner 1 of the present invention. In FIG. 5, the rice cooker 4 includes a furnace main body 5, a surface combustion burner 1 disposed at the bottom thereof, a temperature sensor 3, a temperature measuring unit 6, and a spacer 7. It goes without saying that the surface combustion burner 1 is provided with a fuel gas mixture supply pipe and an ignition device (not shown). 8 is a rice cooker as a cooking container. The oven main body 5 has an opening at the top, and has a space for receiving at least the bottom of the rice cooker 8 as shown in the figure. When the rice cooker 8 is installed at a predetermined position indicated by a broken line in the drawing, the temperature sensor 3 is urged slightly upward by an urging means (not shown) so as to come into contact with the bottom surface of the bottom central portion of the rice cooker 8. Yes. In the temperature measurement unit 6, a lead wire or the like for sending a temperature signal from the temperature sensor 3 to the outside is disposed. In some cases, a cooling means for the temperature sensor 3 may be incorporated.

  In the case of this example, the furnace body 5 has a peripheral side wall and a bottom surface, and the rice cooker 8 is installed and removed at a predetermined position using the upper opening of the furnace body 5. As long as the 8 can be installed at a predetermined position, the furnace body 5 may not have some or all of the side walls and / or the bottom surface, and the passage when the rice cooker 8 is installed and taken out at the predetermined position. It may be used as

  As shown in FIG. 6, which is a plan view of FIG. 5, four spacers 7 are evenly arranged around the upper opening of the furnace body 5 with an interval of 90 degrees therebetween. The spacer 7 supports the buttocks of the rice cooker 8 on its upper surface and holds the rice cooker 8 in a predetermined position, and between the rice cooker 8 and the upper surface of the furnace body 5, It plays the role of ensuring the voids 9, 9, 9, 9 that are distributed almost uniformly over the entire area. The voids 9, 9, 9, 9 serve as passages through which high-temperature combustion gas escapes to the outside of the furnace body 5 during rice cooking. Since the gaps 9, 9, 9, and 9 are distributed almost evenly around the rice cooker 8, the heat effect caused by the escape of the combustion gas is almost uniform over the periphery of the rice cooker 8, and there is less unevenness depending on the location. The advantage that stable rice cooking becomes possible is obtained. In the illustrated example, four spacers 7, 7, 7, and 7 are arranged at intervals of 90 degrees. However, the number of spacers 7 is not limited to four, and may be three or more. , 6, 7, 8, or more. However, it is necessary that the gaps 9 formed between the spacers 7 are distributed almost uniformly around the rice cooker 8.

  In the rice cooker 4 shown in FIGS. 5 and 6, the surface combustion burner 1 having the burner plates 2 a to 2 h shaped as shown in FIG. 1 is provided as heating means, and the burner per unit length in the radial direction is provided. Since the total value of the areas of the combustion surfaces of the plates 2a to 2h tends to increase toward the outside in the radial direction, the cooking pot 8 serving as a cooking container is heated uniformly over the entire bottom surface of the cooking pot 8. Rice cooking without unevenness, that is, cooking can be performed efficiently. Further, the surface combustion burner 1 as shown in FIG. 1 has a tendency that the total value of the areas of the combustion surfaces of the burner plates 2a to 2h per unit length in the radial direction tends to increase toward the outside in the radial direction. Therefore, there is no fear that the heating power by the heating means is concentrated on the center of the bottom of the rice cooker 8 and the center of the bottom of the rice cooker 8 is deformed. For this reason, since the contact state between the temperature sensor 3 and the bottom surface of the rice cooker 8 can always be kept in a good state, the temperature sensor 3 always accurately measures the temperature at the bottom center of the rice cooker 8 as a cooking container. can do. Therefore, the determination and prediction of the end of rice cooking based on the temperature measured by the temperature sensor 3 are also accurate, and there is no fear of rice cooking shortage or rice cooking excess.

  FIG. 7 is a conceptual plan view showing an example of a cooking system using the cooking device of the present invention, and a plurality of rice cooking devices 4 as shown in FIGS. 5 and 6 are arranged in two rows. . Reference numeral 10 denotes a transfer robot that moves in the direction of the left and right arrows in the drawing. The operation of the transfer robot 10 is controlled by a control device (not shown), and the transfer robot 10 operates as follows, for example. That is, when the rice cooker 8 containing rice and water therein and ready for rice cooking is conveyed by the upstream conveying device 11a, a signal is sent from the control device (not shown) to the conveying robot 10, and the conveying robot 10 Moves to the right in the figure, receives the rice cooker 8 from the transport device 11a, moves to the front of the vacant rice cooker 4, and installs the rice cooker 8 at a predetermined position of the rice cooker 4.

  On the other hand, when rice cooking is finished in any of the rice cookers 4, the signal is sent from the control device (not shown) to the transfer robot 10, and the transfer robot 10 moves to the front of the rice cooker 4 where the rice cooking is finished. The rice cooker 8 in which rice cooking has been completed is taken out from 4 and delivered to the downstream transport device 11b. The transport robot 10 repeats such an operation, and the rice cooker 8 sequentially transported by the transport device 11a is cooked by the appropriate rice cooker 4 one after another and sent to the next process. According to such a rice cooking system as a heating cooking system of the present invention, since a surface combustion burner with good combustion efficiency is used, rice can be cooked using a smaller amount of fuel gas, and energy cost can be reduced. Not only that, the time required for cooking rice is shortened, and the amount of cooked rice per unit time can be increased. Furthermore, since the rice cooking device 4 provided with the surface combustion burner 1 of the present invention is used as the rice cooking device 4, the rice cooking without uneven cooking can be performed efficiently, and the end of the rice cooking based on the temperature signal from the temperature sensor. Since judgment and prediction can be performed accurately, there is an advantage that there is no failure in cooking rice and a large amount of rice can be cooked efficiently and accurately.

  FIG. 8 is a conceptual plan view showing another example of the rice cooking system as the heating cooking system of the present invention, and FIG. 9 is a side view thereof. 8 and 9, reference numeral 1 denotes a surface combustion burner according to the present invention, in which a plurality of surface combustion burners 1 are arranged in a straight line at equal intervals horizontally. Reference numeral 12 denotes a chain conveyor which engages with the collar portion of the rice cooker 8 and conveys the rice cooker 8 in the direction of the arrow in the figure. The operation of the chain conveyor 12 is controlled by a control device (not shown). For example, the chain conveyor 12 operates as follows. That is, when the rice cooker 8 that contains rice and water and is ready for rice cooking is conveyed by the upstream conveying device 11a, a signal is sent from the control device (not shown) to the chain conveyor 12, and the chain conveyor 12 When the rice cooker 8 is received from the transfer device 11a, the operation is transferred to a predetermined position on the surface combustion burner 1 located on the most upstream side, and the movement is stopped at that position. The surface combustion burner 1 with the rice cooker 8 stopped at a predetermined position thereon starts to burn and starts cooking the rice cooker 8.

  Subsequently, when the next rice cooker 8 in a rice-cookable state is conveyed by the conveying device 11a, the chain conveyor 12 resumes its operation, and when receiving the rice cooking vessel 8 from the conveying device 11a, it is located on the most upstream side. It is transported to a predetermined position on the surface combustion burner 1 and stops moving at that position. At the same time, the rice cooker 8 that was initially in a predetermined position on the surface combustion burner 1 located on the most upstream side is transported from the upstream side to a predetermined position on the second surface combustion burner 1, and the chain conveyor 12 By stopping the operation, the operation stops at a predetermined position on the second surface combustion burner 1 from the upstream side. The rice cooker 8 that has been transported first and the rice cooker 8 that has been transported next are heated and cooked by the respective surface combustion burners 1 and 1. Thereafter, every time the next rice cooker 8 is conveyed by the conveying means 11a, the chain conveyor 12 repeats operation and stop, and the rice cooker 8 is sequentially conveyed in the direction of the arrow in the figure by the surface combustion burner 1. The rice cooker 8 that has been heated and cooked and has finished cooking is delivered to the downstream transport device 11b and transported to the next step.

  Determination or prediction of the completion of rice cooking in the rice cooker 8 may be performed based on a temperature signal from a temperature sensor provided at the center of each surface combustion burner 1 or based on the total heating time accumulated. You may do it. In this case, if the temperature sensor is provided with a cooling means and the temperature sensor is cooled each time the rice cooker 8 moves, the temperature of each rice cooker 8 can be accurately measured, which is convenient. is there. If rice cooking has already been completed before the rice cooking pot 8 is conveyed to a predetermined position on the surface combustion burner 1 located on the most downstream side, the chain conveyor 12 increases the operating distance, and the rice cooking It is controlled so that the rice cooker 8 that has finished is passed over two or more surface combustion burners 1 and delivered to the downstream conveying device 11b. Each surface combustion burner 1 may be ignited and burned only when the rice cooker 8 is present at a predetermined position above the burner. After the operation of the chain conveyor 12 is started, it is always kept in a burning state. Anyway.

  According to such a rice cooking system as a heating cooking system of the present invention, since a surface combustion burner with good combustion efficiency is used, rice can be cooked using a smaller amount of fuel gas, and energy cost can be reduced. Not only that, the time required for cooking rice is shortened, and the amount of cooked rice per unit time can be increased. Furthermore, since the surface combustion burner 1 of the present invention is used as a heating means, cooking without uneven cooking can be performed efficiently, and determination and prediction of the end of cooking based on the temperature signal from the temperature sensor can be performed accurately. Therefore, there is no failure in cooking rice, and there is an advantage that a large amount of rice can be cooked efficiently and accurately. Moreover, since the conveyance to the predetermined position for rice cooking of the rice cooker 8 should just carry out the intermittent operation | movement which controls the operation | movement of the chain conveyor 12 and repeats an operation | movement and a stop, an expensive conveyance robot and complicated control are sufficient. There is an advantage that an apparatus and a control program are not required, and the system can be easily and inexpensively constructed.

  In the above example, cooking has been mainly explained as a typical cooking for cooking and mainly a rice cooking pot as a cooking container, but the cooking device or cooking system of the present invention is a rice cooking device, It is not limited to the rice cooking system, and the cooking container is not limited to the rice cooking pot. It goes without saying that any type of heating cooking can be a target of the surface combustion burner of the present invention, a heating cooking device using the same, and a heating cooking system as long as cooking is performed by heating the cooking container. Yes.

  Since the surface combustion burner of the present invention, the heating cooking device using the same, and the famous heat cooking system are configured as described above, for example, when cooking such as rice cooking, cooking is very efficient and there is no unevenness in cooking. In the industrial field where rice can be cooked accurately in large quantities, such as the restaurant industry, lunch box manufacturers, hotels, restaurants, hospitals, etc. It has extremely high utility value and is an excellent invention.

It is a top view which shows an example of the surface combustion burner of this invention. It is explanatory drawing of the surface combustion burner of this invention. It is a top view which shows another example of the surface combustion burner of this invention. It is a top view which shows another example of the surface combustion burner of this invention. It is sectional drawing which shows an example of the heat cooking apparatus of this invention. It is a top view which shows an example of the heat cooking apparatus of this invention. It is a plane conceptual diagram which shows an example of the heat cooking system of this invention. It is a plane conceptual diagram which shows another example of the heat cooking system of this invention. It is a side surface conceptual diagram which shows another example of the heat cooking system of this invention. It is a top view which shows the heat cooking apparatus using the conventional surface combustion burner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface combustion burner 2a-2h Burner plate 3 Temperature sensor 4 Rice cooker 5 Furnace main body 6 Temperature measuring unit 7 Spacer 8 Rice cooker 9 Space | gap 10 Transfer robot 11a, 11b Transfer device 12 Chain conveyor

Claims (8)

  The total value of the area of the combustion surface per unit length in the radial direction of the plurality of burner plates, in which a plurality of long burner plates whose surfaces become the combustion surfaces are arranged radially from the center of the burner However, this is a surface combustion burner that tends to increase from the center of the burner toward the outside in the radial direction.   2. The surface combustion burner according to claim 1, wherein the width of the combustion surface of each burner plate tends to become wider from the center of the burner toward the radially outer side.   The surface combustion burner according to claim 1 or 2, comprising a temperature sensor in the center.   An open top is provided with a furnace main body having a space for receiving at least the bottom of the cooking container from the opening, and facing the bottom of the cooking container when the cooking container is installed at a predetermined position of the main furnace body. The cooking apparatus using the surface combustion burner by which the surface combustion burner in any one of Claims 1-3 is arrange | positioned in the position to perform.   5. A plurality of spacers arranged in a plane on the periphery of the upper opening of the furnace body so as to be spaced apart from each other and distributed substantially evenly around the periphery of the upper opening. Cooking device using a surface combustion burner.   A plurality of cooking devices using the surface combustion burner according to claim 4 or 5, conveying means for loading and unloading a cooking container as a heated object at a predetermined position of each heating cooking device, and conveying A cooking system comprising a control device for controlling the operation of the means.   The surface combustion burner according to any one of claims 1 to 3, which is arranged in a plurality of lines, and a cooking container which is a heated body is sequentially moved to a predetermined heating position on the plurality of surface combustion burners and stopped A heating cooking system comprising: a conveying unit that controls the operation of the conveying unit.   The cooking system according to claim 6 or 7, wherein the cooking container is a rice cooker.

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