JP2004141621A - Gas rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a gas rice cooker capable of cooking rice excellently even if the large quantity of the rice is cooked by raising the caloric value of gas combustion by devising the structure of a gas burner. <P>SOLUTION: The gas rice cooker comprises burners 44 having a gas ejection port 58 and an air introduction hole 59 around it to mix ejected gas with introduced air to burn at the tip and a burner support 42 to the inside of which gas is introduced and to the outside of which a plurality of the burners 44 are attached in parallel. The internal space 43 of the burner support 42 filled with gas and the gas ejection port 58 of each of the burners 44 are made to communicate with each other, the air introduction hole 59 of each of the burners 44 are disposed apart from the burner support 42, and rice is cooked by firing the gas in each of the burners 44. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas cooker, and more particularly to a gas cooker suitable for business use that can cook a large amount of rice at a time.
[0002]
[Prior art]
The best way to cook rice is to immerse the rice in water for at least one hour to absorb the water, put it on a gas stove, boil it as quickly as possible from the beginning of cooking, and remove the water previously contained in the rice. Is made to evaporate with boiling heat, and rice is swelled 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. For that purpose, the amount of heat (calories) that can be obtained when burning gas with a gas stove needs to be as high as possible, but there is no gas stove that burns with the high heat required to cook rice deliciously. .
[0003]
In particular, a commercial rice cooker cooks a large amount of rice, such as 5 sho at a time, and in order to cook it deliciously, it is required to burn with a considerably high calorific value. However, at present, it is not possible to obtain truly delicious rice due to lack of calories.
By the way, in order to cook 5 square meters of rice deliciously, at least 15,000 kcal is required, and if possible, 20,000 kcal is desired. However, the calorific value of gas burners of rice cookers currently on the market is 9000 kcal on average, and 12000 kcal at best. This is so low in calories that it is impossible to cook delicious rice. Therefore, in a conscientious restaurant, cook about 3 sho rice with a 5 sho rice cooker so that it can be boiled in as short a time as possible from the beginning of cooking, so that delicious rice can be obtained. ing. However, the amount of heat at the time of gas combustion is still insufficient, so that truly delicious rice cannot be obtained.
[0004]
[Problems to be solved by the invention]
As described above, the reason why a high heat value cannot be obtained with the gas burner of the conventional rice cooker is due to 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 number of small holes through which gas is blown out are formed in the ring-shaped member, and gas and air are blown from these holes. It has a structure to burn out and burn. Further, by arranging two or three large and small burners having the above-mentioned 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 to overcome this limit, it is necessary to review the burner structure itself.
Incidentally, various devices for cooking delicious rice have been conventionally used (for example, see Patent Documents 1 and 2). However, these inventions are to cook delicious rice by controlling the heat power with the passage of time, and not to the idea of increasing the amount of heat to cook delicious rice.
[0006]
[Patent Document 1]
JP 10-192139 A [Patent Document 2]
JP-A-10-179384
The present invention has been made in order to solve the above-mentioned problems of the prior art, and it has become possible to increase the calorific value of gas combustion by devising the structure of a gas burner. Another object of the present invention is to provide a gas cooker that can cook this into truly delicious rice.
The present invention also enables rice to be cooked under the same conditions as when cooking with firewood as fuel, and also enables a restaurant to perform as if cooking with firewood. It is intended to provide a gas cooker.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a burner which has a gas outlet and an air inlet around the burner and mixes the injected gas and the introduced air and burns at the tip, and the gas is introduced into the inside and the outside is burned. A plurality of burners mounted in parallel with each other, a gas-filled internal space of the burner support communicates with a gas outlet of each burner, and an air inlet of each burner is connected to a burner. It is separated from the support and cooked by burning gas in each burner.
Each burner mixes gas and air introduced from an air inlet from a gas outlet and ejects and burns. By attaching a plurality of the burners to the burner support, the amount of heat generated during gas combustion becomes the product of the amount of heat generated by 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 of the invention, the burner support is formed in a hollow disk shape, and a plurality of burners are attached in parallel to the flat outer surface of the disk shape. It is characterized.
According to a third aspect of the present invention, in the first aspect, at least 15 burners are attached to one burner support.
It is possible to obtain 15 times or more the amount of heat generated by one burner.
[0010]
According to a fourth aspect of the present invention, in the first aspect of the present invention, a timer is provided which is capable of switching between heating powers and setting a combustion time for each heating power.
The heat can be automatically controlled, and the heating power can be adjusted to cook delicious rice without human intervention.
[0011]
The invention according to claim 5 is characterized in that, in the invention according to claim 4, the timer is capable of setting the thermal power and the combustion time with the thermal power in a plurality of stages.
According to a sixth aspect of the present invention, in the fourth aspect of the 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 way of cooking rice, and it is possible to obtain the optimal heat control for cooking delicious rice.
[0012]
The invention according to claim 7 is the invention according to any one of claims 4 to 6, wherein the timer includes a steaming timer capable of setting a steaming time after the end of combustion.
The invention according to claim 8 is the invention according to claim 7, characterized in that it has a notifying means for notifying the completion of rice cooking when the steaming timer times out.
By notifying the completion of rice cooking by the notification means, the gas rice cooker according to the present invention can provide rice cooking at a restaurant or the like as a performance to a customer.
[0013]
BEST MODE FOR CARRYING OUT 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 formed by a front panel 16 and a partition plate 14 fixed to the gas cooker main body 10 in parallel with the front panel 16 on the front side of the gas cooker main body 10 formed in a square frame shape. Is formed. A gas suction pipe 22 is drawn into the space 12 from the outside. The gas intake 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 large number of burners 44 are attached to the burner support 42 in parallel. More specifically, a total of 25 burners 44, 16 near the outer periphery of the burner support 42, eight on the inner periphery thereof, and one at the center, are attached. The structure of the burner 44 and the photographing structure of the burner 44 on the burner support 42 will be described later in detail. The pilot valve 24, the main valve 32, and the sub-valve 34 are electromagnetic valves whose opening and closing are controlled by electric signals.
[0014]
The pilot pipe 28 extends along the partition plate 14, and a pilot burner 30 is attached to an end of the pilot pipe 28. The pilot burner 30 extends in parallel along the second pipe 36, and faces one of the burners 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 between the pilot burner 30 and the spark electrode 38. Further, a temperature sensor 40 composed of, for example, a thermocouple is disposed on the opposite side of the spark electrode 38 across the pilot burner 30, and a detection end of the temperature sensor 40 is located between the pilot burner 30 and one of the burners 44. I have.
[0015]
An operation panel 18 is fixed to the front surface of the front panel 16, and operation parts for setting a timer, adjusting thermal power, and the like, including a main switch 20, are attached to the operation panel 18. The partition plate 14 includes a circuit board 15 for controlling the opening and closing of each of the valves 24, 32, and 34 based on the operation of the operation unit, and a buzzer 17 that operates when a time is up or that operates in an emergency to generate an alarm. Installed.
[0016]
Next, the structure of the burner 44 and the structure for attaching 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 the gas. A number of screw holes corresponding to the number of the burners 44 are 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. Are 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 external thread 56 has a smaller diameter than the external thread 54. A center hole 57 is formed in each plug 52, and a distal end side of the center hole 57, that is, a small-diameter male screw 54 side is a gas ejection hole 58 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]
The 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 having a drum-shaped appearance, and 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. In this manner, a number of burners 44 are mounted in parallel on the flat outer surface of one burner support 42 having a hollow disk shape.
[0018]
In the state where the burner 44 is attached to the burner support 42 as described above, the thickness dimension of the intermediate main body portion of the plug 52 is provided between the base end side of the burner main body 46 and the upper surface of the burner support 42. There is a corresponding gap. The end plate 47 of the burner main body 46 has an appropriate number of window holes formed by punching the outer peripheral side of the burring portion 50, and these window holes serve as air introduction ports 59. The gap between the burner main body 46 and the burner support 42 as described above causes the air inlet 59 of each burner 44 to be separated from the burner support 42, and the air inlet 59 is connected to the burner main body 42. Air is introduced from the 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, the air is introduced from the air introduction port 59 by being attracted by the flow of the gas ejected from the gas ejection hole 58, The introduced air and the above-mentioned gas are mixed and ejected from the mesh 60 at the tip of the burner main body 46. A mixture of gas and air ejected from the mesh 60 burns.
[0019]
The burner main body 46 and the end plate 47 can be formed by, for example, pressing a stainless steel plate. At this time, the burner main body 46 can be formed by press-molding the burner main body 46 in a form bisected by a plane including the central axis, and combining this with the end plate 47. Further, the mesh 60 can be formed in the same manner as the end plate 47, and further, a wire mesh member may be overlapped on the end plate 47 and fixed to the burner main body 46.
Gotoku (not shown) is attached to the rice cooker body 10 so that the bottom of the pot or pot for rice cooking is located at an appropriate distance from the tip of each burner 44.
[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 spouted 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, This spark ignites the gas spouted from the pilot burner 30. Whether or not the pilot burner 30 has been ignited can be detected by the temperature sensor 40. The control circuit can perform the opening control of the next main valve 32 or 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. 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 is filled with the gas. After that, the gas is blown out from the gas blowout hole 58. Air is introduced from the air introduction port 59 together with the flow of the gas, and the introduced air and the gas are mixed and ejected from the mesh 60 at the tip of the burner main body 46. The gas mixed with the air blows out 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 spouted from the burner 44 closest to the pilot burner 30 is ignited and burns. The flame of this burner ignites the other burners one after another, and gas burns in all burners 44.
[0022]
According to the burner having the structure described in the above embodiment, a single burner 44 can obtain about 1000 kcal of heat. According to the embodiment shown in FIG. 1, 25 burners 44 are mounted on one burner support 42, and all the burners 44 can simultaneously burn gas, so that the total calorific value of 25000 kcal is obtained. Can be obtained. This amount of heat is twice or more the maximum amount of heat that can be obtained with a stove used in a conventional commercial gas cooker. It has enough heat to boil over time. This makes it possible to boil the water contained in the rice in advance from the inside of the rice in a short period of time, even if it is a lot of rice of about 5 sho, and to effectively make the rice alpha and cook it deliciously Can be.
[0023]
It is desirable that the rice be boiled in a short time from the beginning of cooking and, after being boiled for a certain period of time, reduce the heat to perform "steaming". Thus, 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 supply path of gas and air in each burner 44 when gas is supplied to each valve 44 via the sub-valve 34 and burns is the same as when gas is burned via the main valve 32, and the amount of supplied gas is Only few.
The gas burning time via the main valve 32 and the gas burning time via 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, particularly a cypress lid, is recommended as a lid for a rice cooking pot or a pot. The thick cypress lid has a heat insulating effect along with its weight, and can prevent condensation on the inner surface side of the lid during "steaming". Conventionally, the lid of a general-use rice cooker or a household rice cooker is made of metal, and the heat dissipation is rapid and the temperature is rapidly lowered, so that the heat retention is poor and dew condensation occurs on the inner surface of the lid. For this reason, there is a problem that the dew is dropped on the cooked rice and the rice is sticky, and the steam is not sufficiently steamed due to a decrease in temperature. On the other hand, if a thick wooden lid is used, there is no condensation and the heat retention is high, so that the steaming is sufficiently performed, which 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 the number of burners 44 is 15, the total amount of maximum heat generated by burning gas in all burners 44 is 15,000 kcal, which is higher than the maximum heat of gas stoves used in conventional commercial rice cookers. You can get it 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 main body 10 by the front panel 16 and the partition plate 14 fixed in parallel at a predetermined interval. In the space 12, pipes, valves, and electrical components are arranged. Therefore, maintenance and inspection can be performed at the front part of the gas cooker main body 10, and there is an advantage that maintenance and inspection are easy.
[0027]
Next, another embodiment of the present invention will be described with reference to FIG. This embodiment can provide an appearance and a rice cooking method as if cooking rice in a traditional furnace. 3, a rice cooker main body 10 is covered with a tubular furnace 61 on an upper portion thereof, and a rice cooker 63 is installed on an upper inward flange 62 thereof. A cypress lid 68 is placed on the open upper end of the rice cooker 63. A plurality of intake ports 64 are opened on a lower wall surface of the furnace 61, and a plurality of exhaust ports 65 are opened on an upper wall surface. The flange 66 of the shuttlecock 63 is arranged on the upper inward flange 62 so that the bottom surface of the shuttlecock 63 can be positioned at an appropriate distance from the tip of each burner 44.
The operation panel 18 provided on the front of the rice cooker main body 10 is provided with a power supply indicator lamp 71 that lights up when the power is on, a rice cooker start switch 72, and a completion indicator lamp 74 that indicates the completion of rice cooker. 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. Is set to In addition, these timers adjust the heat of the burner. When the first timer 67 is operating, the timer is controlled so that the burner burns at medium heat, for example, about 80% of the total heat, and the second timer is operated. During the operation of the valve 68, the valve control is performed so that the burner burns at the full heating power, that is, at a high heat of 100%. When the third timer 69 is operating, the burner burns at a low flame of, for example, about 25% of the total heating power. Is set to perform valve control. Further, although not shown, a fourth timer is provided in the rice cooker main body 10. The fourth timer starts its operation when the third timer 69 expires. When the fourth timer is operating, the burner stops burning. When the fourth timer expires, the completion indicator lamp 74 is activated. Is turned on. A sounding body such as a buzzer may be operated together with the lighting of the completion indicator lamp 74 or instead of this.
[0029]
Therefore, the first timer 67 is set to, for example, 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 cooker start switch 72 is set. Suppose you press. The operation at this time is shown in FIG. First, the first timer 67 is operated to burn at medium heat of 80% of the total power for 5 minutes, then the second timer 68 is operated to burn for 10 minutes at the full heat and then the third timer 69 burns for about 5 minutes with a low heat of about 25% of the total heating power. When the third timer 69 expires, the fourth timer starts operating, but the burner burner stops due to the third timer 69 expiring. While the combustion is stopped, the fourth timer operates for 10 minutes, and this time is a time corresponding to “steaming”. When the time of the fourth timer expires, the completion indicator lamp 74 is turned on, and a sounding body such as a buzzer is operated together with or instead of this, to notify that cooking is completed. The completion indicator lamp 74 and the sounding body constitute notification means for notifying completion of rice cooking.
[0030]
These series of thermal power and time distribution are the same as the traditional way of cooking rice using hanamaki and firewood, so that rice can be cooked deliciously. In addition, if the furnace 61 is made with an image of a traditional furnace for cooking rice using the hanamaki 63, it can be provided to customers as a performance of cooking rice in restaurants, restaurants, and the like, for example.
[0031]
Inside the furnace 61, a combustion device 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 is arranged. The time setting by the first, second, third timers 67, 68, 69 and the fourth timer can be arbitrarily changed, and the heat power setting may also be changed. Providing a display lamp 74 for notifying the completion of rice cooking, a sounding body such as a buzzer, and other notification means is also effective for performing at a restaurant, a restaurant, or the like. In the embodiment shown in FIG. 3, the heating power and the time can be set in three stages except for the steaming stage. The heating power and the time may be set in two stages, such as burning for 5 minutes at a heating power of 20%. In this case, the number of timers on the operation panel only needs to be two as in the example shown in FIG. 1, and the opening and closing of the main valve 32 and the opening and closing of the sub-valve 34 shown in FIG. 1 may be controlled.
[0032]
【The invention's effect】
According to the present invention, a burner that has a gas outlet and an air inlet around the burner and mixes the ejected gas with the introduced air and burns at the tip, and the gas is introduced inside and A plurality of burners are provided in parallel with the burner support, and an internal space of the burner support filled with gas communicates with a gas ejection port of each burner, and an air inlet of each burner is connected to the burner support. Because it is configured to cook rice by burning gas in each burner, the product of the amount of heat generated by each burner that mixes gas and air and ejects and burns, and the number of burners is Therefore, the total amount of heat obtained by the gas cooker according to the present invention can be obtained, and a high amount of heat can be easily obtained.
[0033]
In addition, there is a timer that can set the heating time and the burning time with each heating power, and the timer can set the burning time and the burning time with the heating power in multiple stages to match the traditional rice cooking method. It is possible to adjust the heating power, and to obtain the optimal heat control for cooking delicious rice. By notifying the 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 to a customer.
[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 a structure of a burner and a connecting portion of the burner and a burner support in the embodiment.
FIG. 3 is a front view schematically showing another embodiment of the gas cooker according to the present invention.
FIG. 4 is a timing chart showing an example of a timer operation according to another embodiment.
[Explanation of symbols]
42 burner support 43 internal space 44 burner 57 air inlet 58 gas outlet 59 air inlet

Claims (8)

A burner that has a gas outlet and an air inlet around it, mixes the injected gas with the introduced air and burns at the tip,
Having a burner support in which a plurality of the burners are attached in parallel while gas is introduced inside,
The internal space of the burner support body filled with gas communicates with the gas ejection port of each burner,
The air inlet of each burner exists apart from the burner support,
A gas rice cooker characterized by cooking rice by burning gas in each burner. The gas cooker according to claim 1, wherein the burner support is formed in a hollow disk shape, and a plurality of burners are mounted in parallel on the flat outer surface of the disk shape. The gas cooker according to claim 1, wherein 15 or more burners are attached to one burner support. 2. The gas rice cooker according to claim 1, further comprising a timer capable of switching between heating powers and setting a combustion time at each heating power. The gas rice cooker according to claim 4, wherein the timer can set the heating power and the burning time by the heating power in a plurality of stages. The gas rice cooker according to claim 4, wherein the timer comprises a plurality of timers capable of setting a combustion time at each stage. The gas rice cooker according to any one of claims 4 to 6, wherein the timer includes a steaming timer capable of setting a steaming time after the end of combustion. 8. The gas rice cooker according to claim 7, further comprising an informing means for notifying the completion of the rice cooking when the steaming timer times out.

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