JPH074319B2 - Three-dimensional gas rice cooker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a three-dimensional gas rice cooker in which two or more rice cooking chambers are vertically formed.

(Prior Art and Its Problems) Conventionally, a three-dimensional gas rice cooker has a structure shown in, for example, FIG. 3 as a front sectional view and FIG. 4 as a side sectional view.

That is, the three-dimensional gas rice cooker 1 has two or more rice cooking chambers 2, 2 formed in the vertical direction, and the rice cooking pots 3 are arranged in the rice cooking chambers 2, 2 respectively. The upper surface of the pot 3 is a lid portion 4 having a handle 4a.

Each of these rice cooking pots 3 and 3 has a handle 8a of an opening / closing door 8 which is installed on the front wall portion 7 via a hinge 8b so as to be opened and closed.
The door can be opened to enter and exit from the front side. In addition, the upper part of each rice cooking chamber 2, 2 is an upper wall 6 with a heat insulating material.
Also, the side surface is a side wall part 5 with an insulating material,
It is 5. Further, the back side is a rear wall portion 9 in which a heat insulating material is installed. A heat insulating material is also installed inside the opening / closing door 8.

In this manner, a gutter-shaped bottom plate 11 is laterally arranged at the lower portion of the rice cooking pot 3 in each rice cooking chamber 2 surrounded by the heat insulating material, and the bottom plate 11 is A cylindrical heat shield tube 13 is erected on the upper surface side, and a heat insulating material 13a is attached inside the heat shield tube 13. Also, this heat shield tube 13
A heat sensitive portion 14 composed of a thermistor or the like is disposed inside, and the heat sensitive portion 14 is in contact with the bottom portion of the rice cooking pot 3 to detect the temperature of the rice cooking pot 3.
Further, a burner head 15 is arranged on the outer peripheral side of the heat shield cylinder 13, and a gas serving as a fuel is supplied to the burner head 15 from the outside through a gas passage 16.

Further, on the lower side of the rice cooking pot 3 and on the side of the burner head 15, reflecting plates 17, 17 are horizontally arranged. The lower part of the reflection plate 17 is an air chamber 12, and secondary air holes 10, 10 that open to the outside air are opened in the air chamber 12 through the side wall portion 5, and the front wall Part 7
Also, a secondary air hole 10 communicating with the air chamber 12 is formed.

Further, a top plate 18 is arranged above the lid portion 4 of the rice cooking pot 3, and an exhaust port 18a is opened in the top plate 18,
The exhaust port 18a communicates with an exhaust passage 19 formed in the upper wall portion 6 in a concave shape. An exhaust cover 20 is installed at the downstream end of the exhaust passage 19, and the combustion gas is exhausted from the exhaust cover 20 to the outside.

In such a structure, when the burner head 15 is ignited, the combustion gas passes through the periphery of the rice cooking pot 3 and passes through the upper surface side of the lid portion 4 to the inside of the exhaust passage 19 from the exhaust port 18a as shown by an arrow A. Be leaked to. At this time, the secondary air holes 10,10
The air introduced into the air chamber 12 passes through the outside of the heat shield cylinder 13 and, as shown by the arrow B, passes through the periphery of the rice cooking pot 3 together with the combustion gas and flows out to the exhaust port 18a.

In this way, the rice in the rice cooking pot 3 is cooked,
In such a conventional structure, since the combustion gas is naturally exhausted together with the secondary air, it is necessary to introduce a large amount of air into the rice cooking chamber 2 through the secondary air hole 10, and the cold air causes heat sensitivity. It is necessary to cool the section 14 so that the heat-sensitive section does not operate early due to the heat of the burner head 15, and there is a problem that the thermal efficiency deteriorates by introducing a large amount of cold air.

(Means for Solving the Problem) The present invention has been devised in view of the above-mentioned conventional problems, and an object thereof is to provide a gas rice cooker capable of significantly improving thermal efficiency, and a first aspect thereof is The gist is that two or more vertically formed rice cookers, each of which stores a rice cooker in and out, have a burner below the rice cooker and a secondary air passage for introducing secondary air into the rice cooker. A heat-sensing part for detecting the temperature of the rice cooking pot and controlling the burner is provided, and an exhaust passage for exhausting combustion gas is formed above the rice cooking pot, and the exhaust passage is located above the center of the rice cooking pot. That is, an exhaust port having a narrow size that opens at the bottom is formed.

The second gist is to provide a fan in the exhaust passage or the secondary air passage for forcibly guiding the combustion gas to the exhaust port.

The third gist is that one end of the secondary air passage is opened to the outside air at one place and the other end is opened to the periphery of the heating portion.

A fourth gist is that a gap between the lower surface of the rice cooker and the burner and a gap between the upper surface of the rice cooker and the exhaust port are formed to be narrow.

(Function) Since the exhaust port with a narrow size is formed at the upper center position of the rice cooker in each rice cooker, the combustion gas flowing around the rice cooker in the rice cooker room is well centered on the upper part of the rice cooker. Guided to the part, the rice cooker is well wrapped in the combustion gas in the rice cooker, and the thermal efficiency is extremely improved.

Further, in the second aspect, since the fan is provided in the exhaust passage or the secondary air passage, when the fan is operated, the combustion gas is sucked toward the exhaust passage by the fan, and the combustion gas is It is forcibly guided to the exhaust port and the circulation of the combustion gas in the rice cooking chamber is improved, improving the thermal efficiency. or,
When the fan is provided in the secondary air passage, the secondary air is forcedly pushed into the combustion chamber, and the circulation of the combustion gas is improved. By providing the fan, the intake of the secondary air can be narrowed, and the amount of the secondary air introduced into the rice cooking chamber can be reduced.

Further, in the third gist, the secondary air passage is opened to the outside only at one place and the other end is opened to the periphery of the heat-sensitive portion, thereby reducing the amount of secondary air introduced into the rice cooking chamber, The thermal efficiency in the rice cooking chamber can be improved, and the cold secondary air can be brought into contact with the periphery of the heat sensitive portion to cool the heat sensitive portion well.

Further, in the fourth gist, since the gap between the lower surface of the rice cooking pot and the burner and the gap between the upper surface of the rice cooking pot and the exhaust port are formed to be narrow, the combustion gas is small on the lower surface and the upper surface side of the rice cooking pot. Since it is circulated through such a gap, it is possible to heat the entire circumference of the rice cooker satisfactorily, and it is possible to reduce the height dimension of the entire rice cooking chamber compared to the conventional one. The overall height can be reduced.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front sectional view of an essential part of the three-dimensional gas rice cooker of this example, and FIG. 2 shows a side sectional view of an essential part of FIG. In the drawing, the same members as those of the conventional gas rice cooker described above are designated by the same reference numerals, and the description thereof will be omitted.

In this example, a narrow exhaust port 18a is formed on the top plate 18 above the center of the top surface side of the lid 4 of the rice cooking pot 3, and the combustion gas in the rice cooking chamber 2 is exhausted through this exhaust port 18a. It is configured so as to flow out to the passage 19, and the top plate 18 and the lid portion 4 are also provided.
The gap between the upper surfaces of the two is formed to be extremely narrow.
Further, the gap between the bottom surface of the rice cooking pot 3 and the reflection plate 17 is also narrower than that of the conventional one.

Further, in this example, a heat insulating material is omitted on the inner circumference of the heat shield cylinder 13 arranged around the heat sensitive portion 14, and the heat shield cylinder is further omitted.
A secondary air passage 21 is formed to communicate with a lower portion of 13. The secondary air passage 21 has one end opened on the side wall 5 and has a structure capable of introducing outside air from one end. Further, a fan 23 rotatable by a motor 22 is provided in the exhaust cover 20 at the downstream end of the exhaust passage 19, and the combustion gas is forced to the exhaust passage 19 by rotating the fan 23. It has a structure to pull it out.

In such a structure, the secondary air is the secondary air passage.
Since it is introduced into the heat shield cylinder 13 from one inlet into the heat shield 21, the heat sensitive portion 14 is supplied by the introduced cool secondary air.
Is cooled well, the heat of the burner head 15 causes the temperature of the heat-sensitive part 14 to rise to an early temperature, and the burning of the burner 15 is not interrupted. The rice cooker 3 becomes hot and the burner is well heated until a good cooked state is obtained. The head 15 can be burned. Further, the secondary air introduced into the heat shield tube 13 passes through the narrow gap on the bottom side of the rice cooker 3 along with the combustion gas of the burner head 15 and rises along the wall surface of the rice cooker 3, and further the rice cooker 3 It passes through a narrow gap on the upper surface side of the lid portion 4 and is forcibly pulled out from the exhaust port 18a having the narrow size and flows out to the exhaust passage 19. Therefore, the combustion gas can well heat the peripheral edge of the rice cooking pot 3 in the process of flowing out along the bottom surface of the rice cooking pot 3 and along the upper surface side of the lid portion 4,
Further, since the exhaust port 18a has a narrow size, the combustion gas is completely guided to the central portion of the lid portion 4 and heats the lid portion 4 well, so that the rice in the rice cooker pot 3 is strong even from the upper surface side. Heat to
Rice can be cooked on the entire circumference of the rice cooking pot 3.
Further, in this example, since the amount of secondary air introduced into the rice cooking chamber 2 is smaller than that in the conventional case, the inside of the rice cooking chamber 2 is less likely to be cooled by this air, and the heat efficiency is extremely high. It has been improved, and as mentioned above, the rice cooker 3
Since the peripheral surface of is heated by the combustion gas satisfactorily, the thermal efficiency is further improved.

Further, in this example, the combustion gas is not naturally circulated but is forcibly circulated by the fan 23, so that the circulation of the combustion gas in the rice cooking chamber 2 is extremely good and the thermal efficiency is further improved. It is something. Further, by stopping the fan 23 at the final stage, the convection circulation of the combustion gas in the rice cooking chamber 2 is stopped, and the combustion gas in the combustion chamber 2 exerts a steaming effect, which cooks the rice deliciously. It is possible to raise. In addition, as described above, the height dimension inside the rice cooking chamber can be reduced by forming the gap above and below the rice cooking pot 3 to be narrow, and the height dimension of the entire gas rice cooker 1 can be reduced. It is also possible to improve the work of taking in and out the rice cooking pot 3 during the rice cooking work.

In this example, the fan 23 is provided on the exhaust passage 19 side, but a fan is provided in the secondary air passage 21 to forcibly push the combustion gas in the combustion chamber 2 into the combustion chamber 2. A method of convection may be used.

(Effects of the Invention) The three-dimensional gas rice cooker of the present invention has two or more vertically formed rice cookers, each of which houses a rice cooker so that the rice cooker can be put in and taken out of the rice cooker. A secondary air passage for introducing the secondary air and a heat-sensitive part for detecting the temperature of the rice cooking pot and controlling the burner are arranged, and an exhaust passage for exhausting combustion gas is formed above the rice cooking pot. By forming an exhaust port of a narrow size that opens to the exhaust passage at a position above the center of the rice cooking pot, the combustion gas in the rice cooking chamber completely circulates around the peripheral edge of the rice cooking pot, particularly the upper surface side. Therefore, there is an effect that the rice cooker can be heated well and the thermal efficiency can be improved.

Further, by providing a fan in the exhaust passage or the secondary air passage to forcibly combust the combustion gas to the exhaust port, the combustion gas can be circulated favorably in the rice cooking chamber to improve the thermal efficiency. it can. Further, by opening one end of the secondary air passage to the outside air and opening the other end to the periphery of the heat sensitive portion, the amount of air introduced into the rice cooking chamber is reduced, and heat efficiency is improved accordingly. In addition, the heat-sensitive part can be cooled well by the cold outside air introduced, and the rise in overheat of the heat-sensitive part can be suppressed well, and the rice cooker can be kept at a high temperature. In addition, since the gap between the lower surface of the rice cooker and the burner and the gap between the upper surface of the rice cooker and the exhaust port are formed to have a narrow gap, the combustion gas passes through the narrow gap to heat the rice cooker well. It is possible to improve the thermal efficiency. Further, since the gap is narrow, the height of the rice cooker as a whole can be made low, and the effect of improving the work of taking in and out the rice cooker and the like can be achieved.

[Brief description of drawings]

FIG. 1 is a front sectional view of a main part of a three-dimensional gas rice cooker of the present invention,
2 is a side sectional view of an essential part of FIG. 1, FIG. 3 is a front sectional view of an essential part corresponding to FIG. 1 showing a conventional structure, and FIG.
FIG. 3 is a side sectional view of a main part of the figure. 1 ... Three-dimensional gas rice cooker, 2 ... Rice cooker, 3 ... Rice cooker, 4 ... Lid, 8 ... Open / close door, 13 ... Heat shield cylinder, 14 ... Heat sensitive section, 15 ... Burner head, 17 ... … Reflector 18 …… Top plate, 18a …… Exhaust port 19 …… Exhaust path, 21 …… Secondary air path 23 …… Fan

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-88923 (JP, A) real-open Sho-60-176724 (JP, U) real-open Sho-59-67125 (JP, U) real-open Sho-52- 115692 (JP, U) Actual public Sho-45-7351 (JP, Y1)

Claims (4)

[Claims] 1. In each rice cooking chamber which is formed in two or more in the vertical direction and accommodates each rice cooking pot so that it can be put in and out, a burner and a secondary air path for introducing secondary air into the rice cooking chamber are provided below the rice cooking pot. , A heat-sensing part for detecting the temperature of the rice cooking pot and controlling the burner is provided, and an exhaust passage for exhausting combustion gas is formed above the rice cooking pot, and at the central upper position of the rice cooking pot. A three-dimensional gas rice cooker characterized by having a narrow exhaust port that opens to the exhaust passage. 2. The three-dimensional gas rice cooker according to claim 1, wherein a fan for forcibly introducing the combustion gas to the exhaust port is provided in the exhaust passage or the secondary air passage. 3. One of the secondary air passages described above, wherein one end of the secondary air passage is opened to the outside air, and the other end is opened to the periphery of the heat sensitive portion. The three-dimensional gas rice cooker described in the item. 4. The gap between the lower surface of the rice cooking pot and the burner, and the gap between the upper surface of the rice cooking pot and the exhaust port are formed to have a narrow space, and the invention is defined in Claim 1 or Claims. The three-dimensional gas rice cooker according to claim 2 or claim 3.