JP3686904B2 - Gas cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas rice cooker, and more particularly to a gas rice cooker suitable for business use capable of cooking a large amount of rice at a time.
[0002]
[Prior art]
The trick to cook rice deliciously is to immerse the rice in water for at least 1 hour and let the rice absorb water, put it on a gas stove, boil it as quickly as possible from the beginning of cooking, and add the moisture previously contained in the rice. The rice is allowed to evaporate from the inside in as short a time as possible. By the way, it is desirable to start boiling within 10 minutes from the beginning of cooking. To that end, it is necessary to increase the amount of heat (calories) that can be obtained when gas is burned with a gas stove as much as possible, but there is no gas stove that burns with the high heat amount necessary to cook rice deliciously. .
[0003]
In particular, a commercial rice cooker cooks a large amount of rice such as 5 kg at a time, and in order to cook this deliciously, it is required to burn with a correspondingly high amount of heat. However, due to lack of calories, it is not possible to obtain truly delicious rice.
By the way, in order to cook 5kg rice deliciously, at least 15000kcal is necessary, and if possible, we would like 20000kcal. However, the heat quantity of the gas burner of the rice cooker currently marketed is 9000 kcal on average, and 12000 kcal at the highest. This is low in calories and it is impossible to cook delicious rice. Therefore, in a conscientious restaurant, by cooking about 3 kg of rice with a 5 kg rice cooker, the rice is boiled in the shortest possible time from the beginning of cooking, so that delicious rice can be obtained. ing. However, there is still a lack of heat during gas combustion, making it impossible to obtain truly delicious rice.
[0004]
[Problems to be solved by the invention]
Thus, the reason why a high amount of heat cannot be obtained with the gas burner of the conventional rice cooker is the structure of the burner. That is, a conventional gas burner is formed of a hollow ring-shaped member connected to a gas supply pipe, and a large number of small holes through which gas is ejected are formed in the ring-shaped member, and gas and air are injected from these holes. It is structured to be burned out. Further, by arranging two or three large and small burners having the ring-shaped member concentrically, the amount of heat at the time of gas combustion is increased.
[0005]
However, in such a conventional burner structure, there is a limit in increasing the amount of heat, and in order to break through this limit, it is necessary to review the burner structure itself.
Incidentally, various devices for cooking delicious rice have been conventionally made (see, for example, Patent Document 1 and Patent Document 2). However, these inventions are intended to cook delicious rice by controlling the heating power over time, and are not based on the idea of cooking delicious rice by increasing the amount of heat.
[0006]
[Patent Document 1]
JP-A-10-192139 [Patent Document 2]
Japanese Patent Laid-Open No. 10-179384
The present invention has been made to solve the above-described problems of the prior art, and it is possible to increase the amount of heat of gas combustion by devising the structure of the gas burner. However, it aims at providing the gas rice cooker which can cook this into truly delicious rice.
The present invention also makes it possible to cook rice under the same conditions as when using rice cake as fuel, and at a restaurant, etc., makes it possible to perform as if cooking rice using rice cake. The purpose is to provide a gas cooker.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a rice cooker main body having a gas jet outlet and an air inlet around it, a burner that mixes the jetted gas and the introduced air, and burns at the tip, and the gas inside A burner support having a plurality of burners mounted in parallel is disposed on the outside, and the internal space of the burner support filled with gas communicates with the gas outlets of each burner. A gas rice cooker in which an introduction port is present apart from the burner support and cooks by combustion of gas in each burner, and the burner support is formed in a hollow disk shape, and this disk-shaped flat plate A plurality of burners are attached in parallel through a plug having a gas outlet on the outer surface, and the burner is fixed to the burner body and the base end side of the burner body and attached to the plug. A gas that is ejected from a gas ejection port of the plug, and the air introduction, the end plate being provided, an air introduction port provided in the end plate, and a mesh fixed to a tip side of the burner body. The mixed gas of air introduced from the mouth is blown out from the mesh and burns, and the upper part of the rice cooker body is covered with a cylindrical furnace that can install a rice cooking pot. An air supply port and an exhaust port are provided, and an operation panel is installed in front of the rice cooker body .
Each of the burners is jetted and burned by mixing the gas and the air introduced from the air inlet through the gas outlet. By attaching a plurality of burners to the burner support, the amount of heat generated at the time of gas combustion becomes the product of the amount of heat generated by the gas combustion of each burner and the number of burners, and a high amount of heat can be easily obtained.
[0009]
According to a second aspect of the present invention, in the first aspect, characterized in that 15 or more burners are attached to one of the burner support.
A calorie of 15 times or more of the calorie generated by one burner can be obtained.
[0010]
The invention described in claim 3 is characterized in that, in the invention described in claim 1, there is provided a timer capable of switching the heating power and setting the combustion time at each heating power.
Heat control can be automatically controlled, and the thermal power adjustment for cooking delicious rice can be done without human intervention.
[0011]
The invention according to claim 4 is characterized in that, in the invention according to claim 3 , the timer is capable of setting the thermal power and the combustion time at the thermal power in a plurality of stages.
According to a fifth aspect of the present invention, in the third aspect of the present invention, the timer comprises a plurality of timers capable of setting a combustion time at each stage.
It is possible to adjust the heating power according to the traditional method of cooking rice, and to obtain the optimum heat for cooking delicious rice.
[0012]
The invention according to claim 6 is the invention according to any one of claims 3 to 5 , characterized in that the timer includes a steaming timer capable of setting a steaming time after the end of combustion.
A seventh aspect of the invention is characterized in that in the sixth aspect of the invention, there is provided an informing means for notifying completion of rice cooking when the steaming timer expires.
By notifying the completion of rice cooking by the notifying means, the gas rice cooker according to the present invention can be used as a performance for customers in cooking at restaurants and the like.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a gas rice cooker according to the present invention will be described with reference to the drawings.
In FIG. 1, a space 12 is provided on the front side of the gas rice cooker body 10 formed in a square frame by a front panel 16 and a partition plate 14 fixed to the gas cooker body 10 in parallel with the front panel 16. Is formed. A gas inlet tube 22 is drawn into the space 12 from the outside. The gas inlet pipe 22 is connected to a pipe 26 via a pilot valve 24, and the pipe 26 is connected to a second pipe 36 via a main valve 32 and a sub valve 34 arranged in parallel. The pipe 26 is also connected to a small diameter pilot pipe 28. The second pipe 36 is connected to a burner support 42 having a circular planar shape. A number of burners 44 are attached to the burner support 42 in parallel. More specifically, a total of 25 burners 44 are attached, 16 near the outer periphery of the burner support 42, 8 on the inner peripheral side, and 1 at the center. The structure of the burner 44 and the shooting structure of the burner 44 with respect to the burner support 42 will be described in detail later. The pilot valve 24, the main valve 32, and the sub valve 34 are electromagnetic valves whose opening and closing are controlled by electrical signals.
[0014]
The pilot pipe 28 extends along the partition plate 14, and a pilot burner 30 is attached to the tip of the pilot pipe 28. The pilot burner 30 extends in parallel along the second pipe 36 and faces one combustion portion of the burner 44 at a predetermined distance. The tip of the spark electrode 38 is fixed to the side of the pilot burner 30 with an appropriate gap from the pilot burner 30. Further, a temperature sensor 40 made of, for example, a thermocouple is disposed on the opposite side of the spark electrode 38 with the pilot burner 30 in between, and the detection end of the temperature sensor 40 is located between the pilot burner 30 and one of the burners 44. Yes.
[0015]
An operation panel 18 is fixed to the front surface of the front panel 16, and an operation unit such as a timer setting and a thermal power adjustment is installed on the operation panel 18 as well as the main switch 20. The partition plate 14 includes a circuit board 15 that controls opening and closing of the valves 24, 32, and 34 based on the operation of the operation unit, and a buzzer 17 that operates when time is up or when an emergency occurs. It is attached.
[0016]
Next, the structure of the burner 44 and the attachment structure of the burner 44 to the burner support 42 will be described with reference to FIG. In FIG. 2, the burner support 42 is formed in a hollow disk shape, and the inside is hollow. Gas is supplied to the internal space 43 through the second pipe 36, and the internal space 43 is filled with gas. The number of screw holes corresponding to the number of burners 44 is formed in the ceiling portion of the burner support 42, and a male screw 54 formed on the outer periphery of one end of the plug 52 is screwed into each screw hole. Is fixed from the outside of the burner support 42. A male screw 56 is also formed at the other end of the plug 52. The male screw 56 has a smaller diameter than the male screw 54. A central hole 57 is formed in each plug 52, and the distal end side of the center hole 57, that is, the small-diameter male screw 54 side is a gas ejection hole 58 that is narrowed to a small diameter. The center hole 57 and the gas ejection hole 58 communicate with the internal space 43 of the burner support 42.
[0017]
A burner 44 is attached to the burner support 42 by the small-diameter male screw 54 of each plug 52. More specifically, the burner 44 has a burner body 46 whose appearance is a drum shape. An end plate 47 is integrally fixed to one end side (base end side) of the burner body 46, and the other end of the burner body 46. The mesh 60 is integrally fixed to the side (tip side). The end plate 47 has a cylindrical burring portion 50 inward of the burner body 46 at the center thereof, and a female screw is formed on the inner peripheral side of the burring portion 50. The burner 44 is attached to the burner support 42 by screwing the female screw into the male screw 54 of the plug 52. Thus, a large number of burners 44 are mounted in parallel on the flat outer surface of one hollow disc-like burner support 42.
[0018]
When the burner 44 is attached to the burner support 42 as described above, the thickness of the intermediate body portion of the plug 52 is set between the base end side of the burner body 46 and the upper surface of the burner support 42. There is a corresponding gap. The end plate 47 of the burner body 46 is punched on the outer peripheral side of the burring portion 50 to have an appropriate number of window holes, and these window holes serve as air inlets 59. As described above, a gap is generated between the burner main body 46 and the burner support 42, so that the air inlet 59 of each burner 44 is separated from the burner support 42. Air is introduced from a gap between the base end side of 46 and the upper surface of the burner support 42. Further, since the air introduction port 59 is disposed around the gas ejection hole 58 formed in the plug 52, air is introduced from the air introduction port 59 by being attracted by the flow of gas ejected from the gas ejection hole 58, The introduced air and the gas are mixed and ejected from the mesh 60 at the tip of the burner body 46. A mixed gas of gas and air ejected from the mesh 60 is combusted.
[0019]
The burner body 46 and the end plate 47 can be formed, for example, by press forming a stainless steel plate. At that time, the burner main body 46 can be formed by press-molding into a shape divided into two by the plane including the central axis, and by combining it with the end plate 47. Further, the mesh 60 can be formed in the same manner as the end plate 47, and a wire net member may be overlapped on the end plate 47 and fixed to the burner body 46.
The bottom surface of the pot or pan for cooking is to be positioned at appropriate intervals from the tip of the burner 44, trivet (not shown) is mounted on the cooker main body 10.
[0020]
Next, the operation of the above embodiment will be described.
When the main switch 20 is pressed, the pilot valve 24 is opened and gas is ejected from the pilot burner 30, and a high voltage is applied to the spark electrode 38 to cause a spark discharge between the spark electrode 38 and the pilot burner 30, The sparks ignite the gas ejected from the pilot burner 30. Whether the pilot burner 30 has ignited can be detected by the temperature sensor 40. The control circuit can perform the next open control of the main valve 32 or the sub valve 34 by confirming that the ignition has occurred.
[0021]
Next, when an operation for opening the main valve 32 is performed, the control circuit opens the main valve 32. The gas is introduced into the internal space 43 of the burner support 42 through the gas inlet pipe 22, the pilot valve 24, the pipe 26, the main valve 32 and the second pipe 36, and the gas is filled. Then, gas is ejected from the gas ejection hole 58. Air is introduced from the air inlet 59 together with the gas flow, and the introduced air and the gas are mixed and ejected from the mesh 60 at the tip of the burner body 46. A gas mixed with air is ejected from the tips of all the burners 44. Since the flame is emitted from the pilot burner 30 by the combustion of the gas, the gas ejected from the burner 44 closest to the pilot burner 30 is ignited and the gas is combusted. This burner flame ignites one after another in the other burners, and gas burns in all the burners 44.
[0022]
According to the burner having the structure shown in the above embodiment, the heat quantity of about 1000 kcal can be obtained by one burner 44. According to the embodiment shown in FIG. 1, 25 burners 44 are attached to one burner support 42, and all the burners 44 can burn the gas all at once, so that the total amount of heat is 25000 kcal. Can be obtained. This amount of heat is more than twice the maximum amount of heat that can be obtained with a stove used in conventional gas cookers for business use. For example, even when cooking 5 kg of rice, Enough heat to boil in time. This makes it possible to boil the water previously contained in the rice in a short time from the inside of the rice, even in the case of a lot of rice of about 5 liters. Can do.
[0023]
In addition, it is desirable to weaken the heating power in order to perform “steaming” after boiling for a short time from the beginning of rice cooking and boiling for a certain period of time. Therefore, in the illustrated embodiment, the main valve 32 is closed and the sub valve 34 is opened instead, and a small amount of gas is supplied to each burner 44 to reduce the amount of heat generated during gas combustion. The gas and air supply paths in each burner 44 when gas is supplied to each valve 44 and combusted via the sub-valve 34 are the same as when gas is combusted via the main valve 32, and the amount of gas supplied is the same. There are only a few.
The gas combustion time through the main valve 32 and the gas combustion time through the sub valve 34 can be controlled by a timer, or can be manually controlled by human feeling.
[0024]
Although not directly related to the present invention, a thick wooden lid, in particular a straw lid, is recommended as a lid for cooking rice or a pot. The thick cocoon lid has a heat insulating effect with weight, and can prevent condensation on the inner surface side of the lid during “steaming”. The lids of conventional rice cookers for business use and household use are made of metal, and the heat is quickly dissipated and the temperature is rapidly lowered. Therefore, the heat retention is poor, and condensation occurs on the inner surface of the lid. For this reason, there is a drawback that the condensation is dripped onto the cooked rice and the rice is sticky, and the steaming is not sufficiently performed due to the temperature drop. On the other hand, if a thick wooden lid is used, there is no condensation, and the heat retention is high, so it is fully steamed and helps to cook delicious rice.
[0025]
In the illustrated embodiment, 25 burners 44 are attached to one burner support 42, but the number of burners 44 may be 15 or more. If there are 15 burners 44, the total maximum amount of heat generated by the combustion of gas in all the burners 44 is 15000 kcal, and the amount of heat is higher than the maximum amount of heat of the gas stove used in conventional rice cookers for business use. You can get and cook delicious rice.
[0026]
According to the illustrated embodiment, the operation unit is disposed on the front panel 16 and is formed at the front of the gas cooker body 10 with the front panel 16 and the partition plate 14 fixed in parallel with a predetermined interval. Piping, valves, and electrical components are arranged in the space 12. Therefore, the maintenance check can be performed at the front part of the gas cooker main body 10, and there is an advantage that the maintenance check is easy.
[0027]
Next, another embodiment of the present invention will be described with reference to FIG. This embodiment can provide an appearance and a cooking method as if cooking in an old-fashioned oven. In FIG. 3, a cylindrical furnace 61 is placed on the upper portion of the rice cooker main body 10, and a rice cooking pot 63 is installed on the upper inward flange portion 62. A rice cake lid 68 is placed on the upper open end of the rice cooking pot 63. A plurality of intake ports 64 are opened on the lower wall surface of the furnace 61, and a plurality of exhaust ports 65 are opened on the upper wall surface. The hook 66 of the feather hook 63 is applied to the upper inward hook part 62 so that the bottom surface of the feather hook 63 can be positioned at an appropriate interval from the tip of each burner 44.
In addition, the operation panel 18 installed on the front surface of the rice cooker body 10 is provided with a power display lamp 71 that is turned on when the power is turned on, and a rice cooking start switch 72, and a completion display lamp 74 that informs the completion of rice cooking. is set up.
[0028]
The operation panel 18 is provided with three timers 67, 68, and 69. These timers can set individual times, and when the first timer 67 times out, the second timer 68 starts operating, and when the second timer 68 times out, the third timer 69 starts operating. It is set to be. These timers adjust the burner's heating power. When the first timer 67 is in operation, valve control is performed so that the burner burns with a medium flame of about 80% of the total heating power, for example, and the second timer Valve control is performed so that the burner burns with full fire power, that is, a strong fire of 100% fire power while 68 is in operation, and the burner burns with a low fire of about 25% of the total fire power, for example, while the third timer 69 is in operation. It is set to perform valve control. Further, although not shown, a fourth timer is built in the rice cooker body 10. The fourth timer starts operating when the third timer 69 times out. When the fourth timer is operating, combustion of the burner stops, and when the fourth timer times out, the completion indication lamp 74 is started. Is designed to light up. A sounding body such as a buzzer may be operated together with the lighting of the completion display lamp 74 or instead of this.
[0029]
Therefore, for example, the first timer 67 is set to 5 minutes, the second timer 68 is set to 10 minutes, the third timer 69 is set to 5 minutes, the fourth timer is set to 10 minutes, and the rice cooking start switch 72 is set. If you press. The operation at this time is shown in FIG. First, the first timer 67 is activated and burns for 5 minutes with a medium fire of 80% of the total heating power, then the second timer 68 is activated and burns for 10 minutes with a strong fire of all heating power, and then the third timer. 69 burns for 5 minutes with a low heat of about 25% of the total firepower. When the third timer 69 expires, the fourth timer starts operating, but the burner combustion stops when the third timer 69 expires. The fourth timer operates for 10 minutes with the combustion stopped, and this time corresponds to “steaming”. When the fourth timer expires, the completion display lamp 74 is turned on, and a sounding body such as a buzzer is activated along with or instead of this to notify that cooking of rice has been completed. The completion display lamp 74 and the sounding body serve as notification means for notifying completion of cooking.
[0030]
This series of thermal power distribution and time distribution is the same as the traditional rice cooking method using hakama and rice cake, which makes it possible to cook rice deliciously. Further, if the furnace 61 is made with an old-fashioned furnace image for cooking with the use of the feather pot 63, it can be provided to the customer as a cooking performance in a restaurant, a restaurant or the like.
[0031]
In the furnace 61, there is disposed a combustion apparatus including a plurality of burners 44 described with reference to FIGS. 1 and 2 and a burner support 42 to which the plurality of burners 44 are attached. The time settings by the first, second, and third timers 67, 68, and 69 and the fourth timer can be arbitrarily changed, and the heating power setting can also be changed. Providing a display lamp 74 for notifying completion of rice cooking, a sounding body such as a buzzer, and other notification means is also effective for performing performances in restaurants, restaurants, and the like. In the embodiment shown in FIG. 3, the heating power and time can be set over three stages except for the steaming stage. For example, the cooking power is burned with full heating power for 10 to 15 minutes from the start of cooking, You may make it set fire power and time in two steps so that it may burn with 20% of fire power only for 5 minutes. In that case, there may be two timers on the operation panel as in the example shown in FIG. 1, and the opening / closing of the main valve 32 and the opening / closing of the sub valve 34 shown in FIG. 1 may be controlled.
[0032]
【The invention's effect】
According to the present invention, the burner which has the gas injection port and the surrounding air introduction port, mixes the injected gas and the introduced air, and burns at the tip, and the gas is introduced into the inside and the above described on the outside A burner support having a plurality of burners mounted in parallel, the internal space of the burner support filled with gas communicates with the gas outlet of each burner, and the air inlet of each burner is a burner support. The product of the amount of heat and the number of burners generated by each burner that is mixed with gas and air is burned and burned because it is configured to be cooked by gas combustion in each burner. And it becomes the total calorie | heat amount obtained with the gas rice cooker concerning this invention, and high calorie | heat amount can be obtained easily. In addition, the top of the rice cooker body is covered with a cylindrical furnace that can be equipped with a rice cooker. This furnace has an air supply and exhaust port, and an operation panel is installed on the front of the rice cooker body. Therefore, it is possible to provide customers with an image of an old furnace at restaurants and the like.
[0033]
In addition, there is a timer that can set thermal power switching and the burning time for each thermal power, and the timer can set the thermal power and the burning time for that thermal power in multiple stages, so that it matches the traditional rice cooking method It is possible to adjust the heating power, and you can get the optimum heat for cooking delicious rice. By notifying completion of rice cooking by the notification means, the gas rice cooker according to the present invention can also provide rice cooking at a restaurant or the like as a performance for customers.
[Brief description of the drawings]
FIG. 1 is a plan view schematically showing an embodiment of a gas rice cooker according to the present invention.
FIG. 2 is a partial cross-sectional front view showing the structure of the burner in the above embodiment and the joint portion between the burner and the burner support.
FIG. 3 is a front view schematically showing another embodiment of the gas rice cooker according to the present invention.
FIG. 4 is a timing chart showing an example of a timer operation in the another embodiment.
[Explanation of symbols]
42 Burner support 43 Internal space 44 Burner 57 Air inlet 58 Gas outlet 59 Air inlet

Claims (7)

The rice cooker body has a gas outlet and an air inlet around it, and the burner which mixes the jetted gas and the introduced air and burns at the tip, and the gas is introduced inside and the burner outside spaced There burner support mounted to a plurality parallel are arranged, communicated with and the burner interior space of the support and the gas injection ports of the burner gas is filled, the air inlet of the burner from the burner support Gas cooker that exists and cooks by burning gas in each burner ,
The burner support is formed in a hollow disc shape, and a plurality of burners are attached in parallel via a plug having a gas outlet on the disc-like flat outer surface,
The burner is fixed to a burner body, an end plate fixed to the base end side of the burner body and attached to the plug, an air inlet provided in the end plate, and a distal end side of the burner body. A mesh, and is configured such that a mixed gas of a gas ejected from a gas ejection port of the plug and an air introduced from the air introduction port is ejected from the mesh and burned.
The upper part of the rice cooker body is covered with a cylindrical furnace that can be equipped with a rice cooker. This furnace has an air supply port and an exhaust port, and an operation panel is installed on the front surface of the rice cooker body. gas cooker, characterized in that is. The gas rice cooker according to claim 1 , wherein 15 or more burners are attached to one burner support . The gas rice cooker according to claim 1 , further comprising a timer capable of setting a switching time of the thermal power and a combustion time for each thermal power . The gas rice cooker according to claim 3, wherein the timer is capable of setting the thermal power and the combustion time at the thermal power in a plurality of stages . The gas rice cooker according to claim 3, wherein the timer includes a plurality of timers capable of setting a combustion time at each stage . The gas rice cooker according to any one of claims 3 to 5, wherein the timer includes a steaming timer capable of setting a steaming time after the end of combustion . The gas rice cooker according to claim 6, further comprising a notification means for notifying completion of rice cooking when the steaming timer expires .

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