JP2764241B2 - Gas cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooker, and more particularly to a gas cooker in which a soaking plate is interposed between a rice cooker and a gas burner.

[0002]

2. Description of the Related Art In this type of gas rice cooker, a cast rice cooker is used, so that the bottom portion having the strongest heat is set to be thicker than the body portion. ing. Therefore, even with a method in which the bottom of the rice cooker is directly heated by the heat of the gas burner, uneven heating is less likely to occur and a good cook is obtained.

[0003] However, because of the skill required to manufacture a rice cooker made of a casting, and because of the complexity of the manufacturing process, etc.,
Recently, rice cookers of the form pressed from an aluminum plate have been used. In this type of rice cooker,
The overall thickness is substantially uniform. Therefore, when this type is used for a gas cooker, uneven heating, that is, uneven cooking occurs on the bottom side of the rice cooker.

If the thickness of the bottom portion and the thickness of the body portion are both set to be thick, such inconvenience can be solved. However, in this case, the amount of material used increases and the cost is higher and heavier than that of a cast product. In order to eliminate such inconvenience, as shown in FIG.
A configuration is known in which a rice cooker (10) housed in an upper case (1) so as to be freely taken out is equipped with a heat equalizing plate (3) at the bottom.

[0005] In this apparatus, since the soaking plate (3) is heated by the gas burner (B), even if the thickness of the bottom of the rice cooker is thinner than that of a conventional casting, the heating plate is not heated. The heating is uniformly performed by the heat dispersing action of (3), while the heating action of the body of the rice cooker (10) proceeds by contact with the combustion exhaust gas of the gas burner (B). Therefore, even if the thickness of the rice cooker (10) is relatively thin, uniform heating can be performed.

However, in this type, unevenness in cooking is apt to occur. It is practically impossible to bring the soaking plate (3) and the bottom of the rice cooker (10) into close contact over the entire area of the facing part, and the flat or curved surface of the facing part is partially non-contact. Parts may occur. In this case, the degree of heat transfer from the heat equalizing plate (3) to the bottom of the rice cooker (10) differs between the contact portion and the non-contact portion, and this difference causes uneven heating, leading to uneven cooking. is there.

Further, in some cases, poor cooking due to premature cutting or the like occurs. This is the heat sensitive part of the automatic fire extinguishing mechanism (5)
Is in contact with the bottom of the rice cooker (10) to detect this temperature,
The heat-sensitive part (5) contains radiant heat from the soaking plate (3) heated by the combustion flame of the gas burner (B), and the heat-sensitive part (5) accurately reflects the temperature. Not
This causes inconveniences such as the premature disconnection.

[0008] The present invention has been made in view of such a point, and "a part of the thermal power from the gas burner (B) is
(3) to the bottom of the rice cooker (10), as well as the other part to the body of the rice cooker (10), while heating the rice cooker, and to the bottom of the rice cooker (10). Gas burner (B) when the temperature detected by the temperature sensor reaches the set temperature
In a gas cooker of the type that automatically extinguishes a rice cooker, it is an object of the present invention to surely prevent uneven cooking and poor cooking due to early cutting.

[0009]

The technical means of the present invention for solving the above-mentioned problem is as follows: "The heat equalizing plate (3) is formed in a disk shape having an opening (3a) in the center, and the periphery of the opening (3a) A skirt portion (31) protruding downward is continuously provided, and the soaking plate (3) is arranged to face the bottom of the rice cooker (10) with a slight gap therebetween, and the thermosensitive device fixes the skirt portion. The heat-sensitive part (5) is provided so as to penetrate the provided opening (3a), and the heat-sensitive part (5) is in contact with the bottom of the rice cooker (10). And an air passage leading to the gap between the rice cooker and the bottom of the rice cooker. "

[0010]

The above technical means operates as follows. During cooking rice heating, the flame of the gas burner (B) heats the soaking plate (3). Then, the transmitted heat or hot air from the heat equalizing plate (3) reaches the bottom of the rice cooker (10). Also, the combustion exhaust gas is
From the periphery of (3), the gas is discharged to the outside through an exhaust gap between the inner body (12) and the rice cooker (10), and during this time, the body of the rice cooker (10) is heated.

As described above, the bottom and the trunk of the rice cooker (10) are heated, and the rice cooking operation proceeds. Then, in this state, the temperature at the bottom of the rice cooker (10) is detected by the heat-sensitive part (5) of the heat-sensitive device, and the fire is automatically extinguished based on the detection output by the heat-sensitive part. In this cooked rice heating state, the soaking plate (3)
It is natural that an exhaust flow reaches the body of the rice cooker (10) through the lower surface of the rice cooker (10), but between the heat equalizing plate (3) and the bottom of the rice cooker (10) and the heat-sensitive part (5). ) In the heat equalizing plate (3)
An air passage is formed between (3a) and the heat equalizing plate (3) and the bottom of the rice cooker (10) are in a non-contact state over the entire area. Therefore, the hot air from the heat equalizing plate (3) is transmitted to the rice cooker (10) as radiant heat or the like through the gap, so that the contact portion and the non-contact portion are mixed as in the related art. This prevents uneven heat transfer.

Further, a slight air flow is generated through the air passage, and the ambient temperature of the heat-sensitive portion (5) is air-cooled. Therefore, the ambient temperature of the heat-sensitive part (5) does not become excessively high, and the detected temperature of the heat-sensitive part (5) accurately reflects the temperature at the bottom of the rice cooker (10). A skirt portion (31) is continuously provided on the periphery of the opening (3a), so that the radiant heat reaching the heat-sensitive portion (5) from the flame of the gas burner (B) is also blocked by the skirt portion (31) during heating of rice cooking. Is done. Further, even if the flame of the gas burner (B) temporarily overflows for some reason, such as when the flame of the gas burner (B) temporarily overflows, the flame is also guided to the peripheral edge of the heat equalizing plate (3) by the skirt portion (31). Therefore, the disadvantage that the heat-sensitive portion (5) is excessively heated is more reliably eliminated.

[0013]

[Effect] Since unevenness in heat transfer from the heat equalizing plate (3) can be prevented, unevenness in cooking as in the prior art can be eliminated. In addition, since the radiant heat from the gas burner flame and the heat of the flame itself are prevented from being excessively heated, the inconvenience of excessively heating the heat-sensitive part (5) is eliminated, so that the heat-sensitive part (5) is quickly opened. Can prevent poor cooking.

[Other invention] The invention of claim 2 is to set the length of the skirt portion (3) so as to more reliably block the radiant heat from the flame hole portion.

[0015]

[0016]

Next, an embodiment of the present invention will be described in detail with reference to FIGS. In this embodiment, the upper case (1) and the lower case (2) are made rectangular so that a round rice cooker (10) can be accommodated in a substantially rectangular parallelepiped upper case (1). A lid (4) is supported in a single-opening manner at an opening at an upper end of the opening.

The upper case (1) has an upper flange body (1b) connected to the upper end of a rectangular cylindrical bottomed cylindrical casing (1a), and a circular shape formed on the inner peripheral edge of the upper flange body (1b). A bottomed cylindrical inner body (12) with a cross section is inserted and fixed, and the inner body (1
An opening (13) is formed in the bottom portion (12a) of 2), and the inner body (12) is disposed slightly backward with respect to the upper flange body (1b).

A bottom flange (14) protrudes from the lower end of the rectangular cylindrical casing (1a) to the inner peripheral side, and the inner peripheral edge thereof is integrated with the bottom (12a) by spot welding or the like. The strength of the periphery of the opening (13) in the bottom (12a) is reinforced. The inner peripheral diameter of the bottom flange (14) is, of course, set to be larger than the flame hole (B ₁ ) of the gas burner (B) described later, but set smaller than the inner peripheral diameter of the opening (13). Have been. And the bottom flange (14)
Has an U-shaped section (14a) that is open upward.

On the other hand, as shown in FIGS. 2 and 3, in the vicinity of the joint between the upper flange body (1b) and the upper end of the inner body (12),
A groove (15) is formed so as to surround the upper end of (2), and a mouth (15a) is formed through a portion corresponding to the pivotal support of the lid (4), and this is located behind the upper case (1). It faces the inner end of the dew tray (16) which is removably inserted from the surface. The rice cooker (10) has a configuration formed by press-molding an aluminum plate. The bottom has a spherical shape that gently swells upward, and a flange (10a) protrudes from an upper end opening. Then, as shown in FIG. 2 and FIG.
The upper ends of the pair of support plates (17) and (18) attached to the front and back of the rice cooker (10) are brought into contact with the lower surface of the flange (10a), and the rice cooker (10) is set at a predetermined height in the inner body (12). I support it.

The supporting position is set so as to have a very small distance (for example, about 2 to 4 mm) from the upper surface of a heat equalizing plate (3) described later. Further, as shown in the figure, inwardly protruding ridges (19) are formed over a certain range below the support plates (17) and (18). The distance from the body of the rice cooker (10) is set very small (about 1 mm).

The soaking plate (3) is connected to the bottom (10) of the rice cooker (10).
b) is set to have a cross-sectional shape following the back surface shape, and an opening (3a) is formed in the center like a lifting cylinder (50) of a heat-sensitive device described later,
An annular skirt portion (31) is provided continuously from the periphery of the opening (3a). An annular heat retaining heater (H) is attached to the back surface near the periphery of the heat equalizing plate (3), and a lower portion thereof is covered with a protective cover (32) which opens to the outer peripheral side.

Based on the relationship between the position of the rice cooker (10) and the configuration of the soaking plate (3), as shown in FIG.
The lower end of ( ₁ ) is located below the line connecting the flame hole (B ₁ ) of the burner head and the peripheral edge of the heat-sensitive part (5), and the inner peripheral area of the skirt (31) The gap between the upper surface of the plate (3) and the bottom (10b) of the rice cooker (10) communicates, and the skirt portion (31) extends from the flame hole of the gas burner (B) or the high-temperature portion of the burner head to the inner periphery of the skirt. To block radiant heat reaching. The lower end of the skirt (31) is positioned at a position two-thirds of the length of the fire foot from the base of the flame formed in the flame hole (B ₁ ) and the peripheral edge of the heat-sensitive part (5). If it is below the connecting line, a sufficient radiant heat shielding effect is exhibited. This is because the temperature in the range from the base end of the flame to two-thirds of the length of the fire foot is relatively low, and the temperature of the flame on the distal end side is extremely high.

The periphery of the heat equalizing plate (3) and the periphery of the bottom (12a) are connected by a plurality of (for example, three) leg pieces (33) (33). The mounting height of the soaking plate (3) is set to a predetermined height depending on the height. A sheathed heater is employed as the heat retaining heater (H), and its cooling zone is bent along the leg (33) and the bottom (12a), and is located rearward as shown in FIGS. After being guided downward by being surrounded by a leg piece (33) and a bottom (12a) provided below the support plate (18) and a metal cover (33a) overlapped therewith, the bottom (12a) The rear space between the casing (1a) and the inner body (12) from the rear lower end of the inner body (12) along
(1c) has been introduced. The rear space (1c) is connected via a temperature control device (C) to a power supply cord of a reel device (R) provided at the rear of the upper case (1).

The cover (4) is rotatably supported by a bearing (41) provided at the rear upper end of the upper case (1), is always urged in the opening direction, and is provided at the front edge thereof. Engagement piece (42)
Is a lock mechanism (43) provided on the front edge of the upper flange body (1b).
And can be freely disengaged. On the back of the lid (4), the inner lid (40)
Is provided. A weight (45) is externally fitted to a knob cylinder shaft (44) projecting from the center of the inner lid (40), and this cylinder shaft (44)
A shaft (46) projecting from the back surface of the lid (4) is detachably fitted to the shaft. The inner lid (40) is formed in a shallow dish shape as a whole, the cylindrical shaft (44) is attached to a top surface of a raised portion formed in the center, and a flange portion projecting from a peripheral portion has a rice cooker ( It comes into contact with the flange (10a) at the upper end of 10).

The lower case (2) contains a gas burner (B), a fire extinguishing mechanism, a thermal device, a combustion control device, and the like. The thermal device is a base on which the gas burner (B) is mounted.
The lifting cylinder (50), which is supported up and down by a support stand (22) attached to (21) and is always urged upward, and the top wall (5
1), the elevating cylinder (50) is housed in a through space formed in the center of the gas burner (B) and penetrating vertically, and the upper end thereof is soaked. It protrudes upward from the central through hole of the plate (3). And the top wall (51)
A heat-sensitive part (5) comprising a heat-sensitive element (52) is in contact with the bottom of the rice cooker (10).

A permanent magnet (53), which is an input end of the fire extinguishing mechanism, faces the heat-sensitive element (52) so as to be able to move up and down. This fire extinguishing mechanism has a well-known configuration, and the rice cooker operates the heat-sensitive element (51) on the top wall (51) where the permanent magnet (53) interlocking with the lever mechanism is in contact with the bottom (10b) of the rice cooker (10). The rice cooker is sucked and held by 52) and becomes a cooked state (communication state of the gas circuit to the gas burner (B)), and the rice cooker (10) bottom (10b) when cooked is completed.
The magnetism of the heat-sensitive element (52) changes suddenly in accordance with the temperature of the gas, the adsorption to the permanent magnet (53) is released, and the lever mechanism operates, whereby the gas circuit to the gas burner (B) is cut off and the gas burner (B) is to extinguish the fire automatically.

As shown in FIG. 6, the heat-sensing part (5) of the heat-sensing device has a bottom (10b) of the rice cooker (10) in an opening (3a) surrounded by a skirt (31) as shown in FIG. However, there is a predetermined gap between the elevating cylinder (50) having the heat-sensitive part (5) and the skirt part (31), and this gap communicates with the lower space. At the same time, since it communicates with the gap (G) between the bottom (10b) of the rice cooker (10) and the heat equalizing plate (3), this communication path serves as a path for fresh air,
The lifting cylinder (50) is air-cooled. Further, the above-mentioned radiant heat reaching from the gas burner (B) to the heat sensitive portion (5) is cut off by the skirt portion (31). Thereby, the effects of the present invention described above can be obtained.

The above-described embodiment has the following features in addition to those described in the section of operation and effect. . The rice cooker (10) is a press-formed product made of an aluminum plate, so it is lightweight and easy to handle. Although it is inconvenient at the time, in this embodiment, convex ridges (19) and (19) are partially provided before and after the inner trunk (12), and this and the trunk of the rice cooker (10) are very small. Since it is set to a small gap, it comes into contact with the ridge with a very small eccentric movement of the rice cooker (10), and this ridge exerts a braking effect,
It is difficult for the rice cooker (10) to turn around.

[0029] When keeping warm, the bottom of the rice cooker (10) and a soaking plate
(3), a very small gap is formed between the heating heater (H) and the layer of hot air from the soaking plate (3) heated by the heater, and the rice cooker. Since the air heat insulating layer flowing from the gap is formed between the outer surface of the shuttle (10) and the outer surface, a sufficient heat insulating effect can be obtained even in the case where the conventional heat insulating layer is not used.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a conventional example.

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is a plan view thereof.

FIG. 4 is a cross-sectional plan view of a main part.

FIG. 5 is a partially cutaway plan view of a portion of a heat equalizing plate (3).

FIG. 6 is a detailed view of the relationship between the heat equalizing plate (3) and its vicinity.

[Explanation of symbols]

 (10) ・ ・ ・ Cooking pot (B) ・ ・ ・ Gas burner (10) ・ ・ ・ Cooking pot (3) ・ ・ Heat equalizing plate (31) ・ ・ ・ Skirt (3a) ・ ・ ・ Opening

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shuji Kashiwara 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi Inside Linhai Corporation (56) References JP-A-63-1513013 (JP, A) 30119 (JP, U) Fully open 58-163126 (JP, U) Fully open 58-1817 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47J 27/00 105

Claims (2)

(57) [Claims] 1. A part of the heating power from the gas burner (B) reaches the bottom of the rice cooker (10) via the heat equalizing plate (3), and the other part is the body of the rice cooker (10). And a gas cooker of a type that automatically extinguishes the gas burner (B) when the temperature detected by the heat-sensing device brought into contact with the bottom of the rice cooker (10) reaches a set temperature. The heat equalizing plate (3) is formed in a disk shape having an opening (3a) in the center, and a skirt portion (31) projecting downward is continuously provided on the periphery of the opening (3a). ) Is opposed to the bottom of the rice cooker (10) with a slight gap therebetween, and the heat-sensitive device is provided so as to pass through the opening (3a) provided with the skirt portion, and the heat-sensitive portion ( 5) is configured to be in contact with the bottom of the rice cooker (10), A gas cooker provided with an air passage extending from an inner peripheral side to a gap between a heat equalizing plate (3) and a bottom of a rice cooker. 2. The gas rice cooker according to claim 1, wherein the skirt portion (31) is extended downward to a position where a heat radiation path from the flame hole portion of the gas burner (B) to the heat sensitive portion (5) is blocked. .