JP2818998B2 - Insulated 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 having a heater for heating.

[0002]

2. Description of the Related Art As this type of rice cooker, a type of rice cooker in which rice is cooked by the heat of a gas burner and which can be kept warm for a long time by an electric heater after the completion of rice cooking has been widely used. For example, as shown in FIG. 1, the body of a rice cooker (10) removably accommodated in an upper case (1) is built in the upper case (1), and a heat insulating material and a heater (H ) Is enclosed by a heat insulation heat-insulating layer (11), and the bottom of the rice cooker (10) is exposed downward from the heat insulation heat-insulation layer (11) to thereby provide a gas burner (B).
It is configured to be heated by the thermal power of.

Therefore, in this conventional device, the lower case
The cooking operation is performed by the heat of the gas burner (B) by the action of the gas burner (B) and the combustion control device thereof in (2), and the combustion of the gas burner (B) is automatically stopped after the cooking is completed. At the same time, the rice cooker (10) is constituted by the above-mentioned heat-retaining heater (H), a heat-insulating heat-insulating layer (11) for accommodating the same, and a heat-insulating material provided on the lid (4) and a heat insulating layer (49) composed of a heater.
The inside is heated and kept warm.

In this conventional apparatus, the heating power from the gas burner (B) directly reaches the rice cooker (10), but since the bottom of the rice cooker (10) is exposed from the adiabatic heat insulating layer (11), the heat is kept in this part. Insufficient efficiency. On the other hand, in order to ensure the heat insulation of the rice cooker (10), a heat insulating layer surrounding the body of the rice cooker
(11) is required, and the configuration of the upper case (1) is complicated.

[0005] The present invention has been made in view of the above-mentioned point, and is based on a gas burner (B) having a rice cooker (10) removably housed in an upper case (1) provided in a lower case (2). In the heat-insulated gas cooker that heats rice by heating and after the rice cooking is completed, it is kept warm by a heat-retention device built into the upper case (1), even if the heat insulation layer (11) is not provided. The task is to ensure sufficient performance.

[About the invention of claim 1]

[0007]

The technical means of the present invention for solving the above-mentioned problem is as follows: "An inner part for accommodating a rice cooker (10) in an upper case (1) in a loose fit state with a predetermined gap. A body (12) provided with the predetermined gap defining a discharge passage for exhaust air of combustion exhaust gas from the gas burner (3);
2) A disk-shaped soaking plate (3) approaching the bottom of the rice cooker (10) with a slight gap therebetween and a heater (H) attached to the lower surface of the plate. A heating unit for heat retention is provided close to the bottom of the rice cooker (10), and the rice cooker (10) has a flange (10a) projecting from an upper end opening portion. , The flange portion (1) of the rice cooker (10) accommodated substantially concentrically therein.
0a) is provided, and one of the support portions is used as a temperature detection support portion, and the temperature detection support portion is in contact with the flange portion (10a) or the contact portion. A sensor (6) for detecting the temperature of heat retention is provided at a portion of the thermal connection part located on the outer peripheral side of the inner body (12), and the heat generating portion for heat retention is controlled based on the detection output of the sensor (6). I tried to do that. "

[0008]

The above technical means operates as follows. Rice cooker
(10) is provided on the inner body (12), and the rice cooker (10) is positioned at a predetermined position by a plurality of support portions that contact the upper part of the rice cooker (10) and the flange portion (10a). Supported. In this support state, the rice cooker (10) is in a loosely fitted state with the inner body (12). Therefore, at the time of heating rice cooking, the rice cooker (10) is heated by the heat of the gas burner (B), but the combustion exhaust gas at this time passes through the gap between the inner body (12) and the body of the rice cooker (10). Is discharged. After the rice cooking is completed, the hot air from the heat-retaining heating unit provided near the bottom of the rice cooker (10) rises from the bottom to the body through the gap, and is then discharged. In this warming state, the temperature of the rice cooker (10) (corresponding to the temperature of rice cooked in the rice cooker (10)) is detected by the sensor (6), and based on the detected temperature, the heat generation for heating is performed. The part is controlled.

The sensor (6) is located at a position deviated from the gap between the rice cooker (10) and the inner body (12), and the sensor (6) is provided with a flange portion (10) of the rice cooker (10). The temperature detected by the sensor (6) accurately reflects the temperature of the rice cooker (10) because it is attached to a portion that is thermally connected to the temperature detection support that comes into contact with 10a). Further, since the combustion exhaust gas passing through the gap between the inner body (12) and the rice cooker (10) is blocked at the flange portion (10a), there is no thermal influence from the combustion exhaust gas on the sensor (6). . As described above, the sensor (6) for detecting the temperature of the portion accurately reflecting the temperature of the rice cooker (10) corresponding to the temperature of the rice in the rice cooker (10) controls the heat retaining heat-generating portion. The heat from the heat-generating heating part is heated and kept so as to surround the entire outer surface of the rice cooker from the bottom to the trunk of the rice cooker (10). Further, the heat-generating portion for heat retention is composed of a disk-shaped soaking plate (3) which is close to the bottom of the rice cooker (10) with a slight gap therebetween and a heater (H) attached to the lower surface of the plate. Soaking up (3)
The heat from the heat retaining heater (H) attached to the lower surface of the rice cooker (3) is distributed to the soaking plate (3) and then reaches the bottom of the rice cooker (10). No unevenness in heat retention and heating.

[0010]

[Effect] The heat insulation control by the sensor (6) is reliably executed, and the heat is heated and kept so as to surround the entire outer surface of the rice cooker. Is improved. In addition, the heat from the heater (H) keeps the bottom of the rice cooker (10) from being intensively heated, so that there is no uneven heating and heating. The gap between the inner body (12) and the rice cooker (10) is blocked by the flange (10a) at the portion where the sensor (6) is arranged, so that heat from the combustion exhaust to the sensor (6) is removed. There are no negative effects. This effect is particularly remarkable when the sensor (6) is arranged on the outer peripheral side of the inner body (12).

[Other Inventions] In the invention of claim 2, the temperature detecting support portion is formed as an inner body (12).
A part of the component wall is formed as a bulged portion protruding inward and upward, and the sensor (6) or its holding case is attached in a tightly contacted state within the bulged portion. The configuration of the support is simplified. According to the third aspect of the present invention, the temperature detection support portion is "contacted with the upper part of the rice cooker (10)".
0) to the temperature detection support portion is more efficient.

[0012]

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 tubular 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) extends 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, near the joint between the upper flange body (1b) and the upper end of the inner body (12), as shown in FIGS.
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 a pair of support plates (17) and (18) (corresponding to the support of the present invention) attached to the front and rear of the rice cooker (10) are in contact with the lower surface of the flange (10a). It is supported at a predetermined height in the body (12).

In this supporting state, the rice cooker is supported so that there is a very small interval (for example, about 2 to 4 mm) between the bottom of the rice cooker (10) and the upper surface of a soaking plate (3) described later. Height is set. The lower ends of the support plates (17) and (18) are fixed to the inner body (12), and the upright pieces (F) extending above the fixed portions are bent inward from the fixed portions. After that, it rises along the body of the rice cooker (10), and the bent upper end piece following the upper end of the upright piece (F) extends from the upper end of the body of the rice cooker (10) to the flange.
It matches the curved surface up to the lower surface of (10a). Accordingly, the range from the upright piece (F) to the upper bent piece is the corresponding rice cooker.
It comes into close contact with the outer surface of (10). Of the pair of support plates, the front support plate (17) functions as the above-described temperature detection support portion, and the upper end thereof has an inner surface extending from the lower surface of the flange portion (10a) as shown in FIG. Extension piece (1
7a) are connected in series, and a thermal reed switch (61) as a sensor (6) is attached to the tip of this extension piece. That is, the sensor (6) is thermally connected to the contact portion of the support plate (17) with the flange portion (10a) via the extension piece (17a). The thermal reed switch is a switch that cuts off an electric circuit when the temperature is equal to or higher than a set temperature and is in a conductive state when the temperature is equal to or lower than the set temperature.
By "OFF", the heat retaining heater (H) is turned "ON-OFF", and the temperature of the rice cooker (10) is maintained at the set temperature.

As shown in the drawing, a protruding ridge (19) projecting inward is formed over a predetermined range below the support plates (17) and (18). The distance between the edge and the body of the rice cooker (10) is set very small (about 1 mm). The heat equalizing plate (3) is set to have a cross-sectional shape following the back surface shape of the bottom surface of the rice cooker (10), a through hole for a heat-sensitive mechanism section described later is formed at the center, and an annular shape is formed from a periphery of the through hole. Are continuously provided. An annular heater (H) is attached to the back surface near the periphery of the heat equalizing plate (3), and a lower part of the heater is covered with a protective cover (32) which opens to the outer peripheral side.

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 control device (C) to a power supply cord of a reel device (R) provided at the rear of the upper case (1). The control device (C) functions for controlling rice cooking and for controlling heat retention.

The lid (4) is rotatably supported by a bearing (41) provided at the rear upper end of the upper case (1) and 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) incorporates a gas burner (B), a fire extinguishing mechanism, a heat-sensitive mechanism, a combustion control device, and the like. The heat-sensitive mechanism includes a base (21) for mounting the gas burner (B). An elevating cylinder (50) which is supported by a support stand (22) attached to the upper and lower parts and is always urged upward, and a thermosensitive element (52) provided on a top wall (51) of the elevating cylinder. The elevating cylinder (50) is formed in the center of the gas burner (B) and is housed in a penetrating space penetrating up and down, and the upper end thereof is a heat equalizing plate.
It protrudes upward from the central through hole of (3).

A permanent magnet (53) serving as 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 cooking operation causes the permanent magnet (53) interlocking with the lever mechanism to be connected to the heat-sensitive element (52) on the top wall (51) in contact with the bottom of the rice cooker (10). The magnetic state of the thermosensitive element (52) is suddenly changed according to the temperature of the bottom of the rice cooker (10) when the rice is cooked and the rice is cooked (the gas circuit communicates with the gas burner (B)) and the rice cooking is completed. Then, 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 automatically extinguished.

The above 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.

[0023] Although the thickness of the bottom is thinner than that of the casting, in this embodiment, the heat of the combustion flame of the burner (B) is dispersed and alleviated by the soaking plate (3), and the bottom of the rice cooker (10) is reduced. , So that the cooked food is improved. . In the configuration in which a very small gap is formed between the bottom of the rice cooker (10) and the soaking plate (3) during the heat retention, the heater (H) for heating and the heating by the heater (H) are used during the heat retention. The heat insulation layer flowing from the gap is formed between the layer of hot air from the heat equalizing plate (3) and the outer surface of the rice cooker (10), and the conventional heat insulation layer is not used. Even in the form, a sufficient heat retaining effect can be obtained.

[0024] As shown in FIG. 4, the support plates 17 and 18 support the rice cooker in a manner to be in contact with the trunk of the rice cooker 10. These are located at the front part and the rear part of the upper case. Therefore, at the time of cooking rice, the combustion exhaust gas from the burner (B) does not reach the upper front part and the rear upper part by the support plates (17), (18), so that the shaft supporting part of the lid (4) and the lid There is no inconvenience that the locking mechanism at the front edge is damaged by being heated by the combustion exhaust gas.

[Others] In the above-mentioned embodiment, separate support plates (17) and (18) are attached to the inner body (12) to form the support portion. This support portion is provided as shown in FIGS. 7 and 8. Alternatively, a part of the inner trunk (12) may be formed as a bulged portion (N) (M) which is partially bulged inward and upward. The thermal reed switch (61) may be mounted so that the top surface of one of the bulges (N) comes into contact with the inner surface of the part in contact with the flange (10a). In this case, when the protective cover is brought into contact with the inner surface of the contact portion in a state where the thermal reed switch (61) is surrounded by the protective cover (62), the protection of the thermal reed switch (61) is ensured. Further, as shown in FIG. 9, a thermal reed switch (61) is attached to an extension piece from a mounting bracket which is brought into close contact with the inner surface of the portion in contact with the flange portion (10a) on the top surface of the bulging portion (N). Is also good.

[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 a support plate (17).

FIG. 7 is a plan view of another example of the support portion for supporting the rice cooker (10).

FIG. 8 is a sectional view thereof.

FIG. 9 is an explanatory view of another mounting structure of the thermal reed switch (61).

[Explanation of symbols]

 (10) ・ ・ ・ Cooking rice cooker (1) ・ ・ ・ Upper case (B) ・ ・ ・ Gas burner (2) ・ ・ ・ Lower case (12) ・ ・ ・ Inner body (3) ・ ・ Heat equalizer (H)・ ・ ・ Heating heater (10a) ・ ・ Flange (17) ・ ・ ・ Support plate (6) ・ ・ ・ Sensor

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyoshi Matsuyama 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi Inside Linhai Co., Ltd. (56) References Japanese Utility Model 1983-64219 (JP, U) Japanese Utility Model Hei 3- 99519 (JP, U) Japanese Utility Model Showa 57-75817 (JP, U) Japanese Utility Model Showa 50-61975 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47J 27/00 103 A47J 27/00 105

Claims (3)

(57) [Claims] 1. A rice cooker (10) removably accommodated in an upper case (1) is heated by a gas burner (B) provided in a lower case (2) and cooked. An inner shell for accommodating a rice cooker (10) in an upper case (1) in a loosely fitted state with a predetermined gap in an insulated gas cooker in which heat is kept by a heat retaining device incorporated in (1). (12), the predetermined gap forms an exhaust passage for exhaust air of combustion exhaust gas from the gas burner (3), and the rice cooker (1) is provided in the inner body (12).
The heat-generating heat-generating portion, which is composed of a disk-shaped heat equalizing plate (3) and a heater (H) attached to the lower surface of the disk-shaped heat equalizing plate (3), which is close to the bottom of (0) with a slight gap therebetween, Kettle (1
0), the rice cooker (10) is provided with a flange (10a) projecting from an upper end opening, and is accommodated in the upper part of the inner body (12) substantially concentrically. A plurality of support portions are provided in contact with the flange portion (10a) of the rice cooker (10), and one of the support portions is used as a temperature detection support portion, and the flange portion (10a) of the temperature detection support portion is provided. A sensor (6) for detecting the heat retention temperature is provided at a portion which is in contact with or a thermal connection portion with the contact portion and which is located on the outer peripheral side of the inner body (12). A heat-insulated gas rice cooker that controls a heat-insulating heating section based on a detection output. 2. The temperature sensing support portion includes an inner body (12).
A part of the component wall is a bulging portion projecting inward and upward,
The heat-retaining gas cooker according to claim 1, wherein the sensor (6) or a holding case for the sensor (6) is attached to the bulging portion in a close contact state. 3. A rice cooker (1) comprising:
The heat-retaining gas cooker according to claim 1 or 2, wherein the gas cooker is also brought into contact with the upper part of the body (0).