JP3377658B2 - Cooking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a cooker such as a rice cooker, and more particularly to a method for reducing the flow of soup from a lower surface of a lid when the lid is opened. It relates to the cooker that was planned. 2. Description of the Related Art As a cooker, for example, a rice cooker, the vapor generated during cooking rice is prevented from being condensed on the lower surface of the lid, and when the lid is opened, the soup formed by the condensation forms a lower surface of the lid. A product that prevents it from flowing down and eliminates the traditionally used soup has been developed and commercialized. However, in the conventional products, it is not possible to completely prevent the falling of the soup when the lid is opened due to variations, and the same (voltage 100 V, room temperature)
(20 ° C, maximum amount of cooked rice, same amount of water)), when the rice is cooked several times, the amount of dropping to the upper part of the body when the lid is opened is 0 ml,
It was 0.3 ml, and in some cases exceeded 1.0 ml. Therefore, when the product was designed and developed, the amount of dropping that did not cause a problem may be increased when the user actually uses the product. The present invention has been made in view of such a point, and an object of the present invention is to provide a cooker which can reduce the amount of dropping by eliminating the variation in the amount of dropping. is there. In order to achieve the above object, the present invention provides a pot, a lid for covering the pot, a lid heating means for heating a lower surface of the lid, a space portion provided on the lid body, and the steam passage hole a of the upper surface was communicated in the lid and the space portion, and the steam passage hole B which communicates with said space and the lower surface of the lid, this Through steam passage hole B
A bed for collecting the water that flows into the space
It has a water return hole and an inner lid that covers the pot below the lid,
This inner lid is a steam that connects the inside of the pot and the lower space of the lid.
It has a passage hole C, and has a total opening area A1 of the steam passage hole A, a total opening area B1 of the steam passage hole B, and a total opening area of the steam passage hole C.
The relationship with C1 is such that A1> C1≥B1 , and the lower surface of the lid is heated by the lid heating means at least when steam is generated from the pot. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a rice cooker as a cooker. Reference numeral 1 denotes a rice cooker main body, and an inner frame 2 formed in a bottomed cylindrical shape is provided in the rice cooker main body 1,
The inner frame 2 constitutes a pan storage unit 3 whose upper surface is open. [0007] A rice cooker 4 comprising, for example, an annular sheathed heater is provided as a heating means at the inner bottom of the pot storage section 3, and a heater plate 5 is provided substantially horizontally on the rice cooker 4. An opening 6 is formed at the center of the heater plate 5, and a temperature detector 7 is provided in the opening 6. This temperature detector 7 has a temperature sensor 9 attached to the upper end surface inside a heat-sensitive cylinder 8. And this temperature detector 7
Is elastically urged to project upward from the opening 6 via a spring 10. A pot 13 is removably accommodated in the pot housing 3 through an opening at the upper end thereof. This pot 13
The bottom surface is in contact with the heater plate 5, and the step 14 formed on the upper portion is engaged with and supported by the opening edge of the inner frame 2. The temperature detector 7 is in elastic contact with the center of the outer bottom surface of the pan 13 by the urging force of the spring 10. A lid 14 for covering the upper surface of the pot 13 is attached to the upper part of the rice cooker body 1 via a hinge 15 so as to be rotatable up and down. The lid 14 has an upper surface plate 16 and a lower surface plate 17 made of synthetic resin, which are vertically stacked,
A lower lid 18 made of metal such as aluminum attached to the lower surface of the lower plate 17, and an annular lid packing 19 that is in close contact with the upper edge of the pot 13 on the lower surface of the lid 14.
And a lid heater 20 as lid heating means is mounted on the upper surface of the lower lid 18. It should be noted that a conventional rice cooker is provided with a catch in the vicinity of the hinge portion of the lid, but this rice cooker is not provided with the catch. A space 23 is provided in the cover 14, and the space 23 is formed by a cylindrical wall 17 a formed on the lower plate 17.
It consists of. The upper surface of the space 23 is covered with a vapor port cover 24, and the lower surface of the space 23 is closed with a vapor port packing 25. The steam port packing 25 may be fixedly provided on the lower surface of the space 23 or may be detachably provided. The steam port cover 24 has a single or a plurality of steam passage holes A for communicating the inside of the space portion 23 with the atmosphere above the space portion 23. Further, the steam port packing 25 is formed with a single or a plurality of steam passage holes B for communicating the space below the lid 14 with the inside of the space portion 23. In addition, the steam port packing 25 has a water return hole 2
8 are formed. The shape of each of the steam passage holes A and B may be a round shape, a square shape or another irregular shape, and a structure in which a part of the steam passage holes A and B is disposed inside the space 23. It may be. At approximately the center of the lower surface of the lid 14, a stud 30 is attached.
An inner lid 31 for opening and closing the opening of the pan 13 is detachably attached to a lower part of the pan 4. The inner lid 31 is formed with a plurality of steam passage holes C for communicating the inside of the pot 13 with the space below the lower lid 18. Here, the total opening area of the steam passage hole A (the total of all the openings when a plurality of holes are provided, or the opening area of one of them when a single hole is provided) is A 1, and that of the steam passage hole B is The total opening area (the total area of all the holes when a plurality of holes are provided, or the single opening area of a single hole) is B1, and the total opening area of the steam passage hole C is C1. A1
> C1≥B1. Preferably, A1> 2B1
And Specifically, for example, A1 is 3 cm ² and B1 is 1 cm.
² , C1 is set to about 1.5 cm ² . The pan 13 is formed by pressing an aluminum plate or die-casting aluminum. The inner surface of the pan 13 is coated with a fluororesin, and the outer surface of the pan 13 is coated with alumite or a silicone or fluororesin non-adhesive coating. Also,
The inner frame 2 is formed by pressing an aluminum plate, and the inner surface is anodized. The gap between the side surface of the pot 13 and the side surface of the inner frame 2 is the smallest at the top edge of the inner frame 2, for example, 0.3 to
It is set to 2.0mm. The side surface of the inner frame 2 is inclined such that the gap increases from the uppermost edge to the lower side. That is, the inclination of the side surface of the pot 13 is configured to be gradually larger as the inclination of the side surface of the inner frame 2 goes downward. Therefore, when taking out the pot 13 from the inside of the inner frame 2, the pot 13 can be easily taken out even if the pot 13 is inclined obliquely on the way, and the usability is good. A brake bush 35 made of an elastic material such as silicone rubber or fluorine rubber is attached to the upper end edge of the inner frame 2 at three substantially equal circumferential positions. The brake bush 35 integrally has an elastically deformable tongue piece 35a, and the thickness of the tongue piece 35a is slightly smaller than the size of the gap between the uppermost portion of the inner frame 2 and the pot 13. When the pot 13 is not arranged in the inner frame 2, each tongue piece 35a keeps a substantially horizontal state so as to protrude toward the center of the inner frame 2 as shown by a broken line in FIG. When the pot 13 is inserted into the frame 2,
Each tongue piece 35a is elastically deformed downward and
And the inner frame 2, so that the elastic restoring force of the tongue pieces 35a uniformly presses the side surface of the pan 13. Therefore, when the pot 13 is stored in the inner frame 2, the center of the inner frame 2 and the center of the pot 13 can be surely matched with each other.
1 and the opening of the pan 13 can be prevented from being displaced, and the rice cooker 4 and the pan 13 can be prevented from being displaced from each other to prevent uneven heating. Since the side of the pot 13 is evenly pressed by the tongue pieces 35a of the brake bushes 35, the pot 1
The hot pot 1 when rice in 3 is used for rice scooping
3 can be prevented from rotating. Each brake bush 35 includes the inner frame 2 and the pan 1
3 is mounted on a portion where the gap between the brake bush 3 and the brake bush 35 is minimized. Therefore, the size of the brake bush 35 can be minimized, which is economically advantageous. The degree of deformation of the tongue piece 35a can be increased, and the effect of preventing the pan 13 from rotating due to its restoring force can be more effectively obtained. Therefore, even if the outer surface of the pot 13 is improved in cleaning property by a non-adhesive coating, the effect of preventing the rotation of the pot 13 can be sufficiently obtained, and the pot 13 and the inner frame are formed by the tongue pieces 35a. 2 is sufficiently secured, so that the outer surface of the pot 13 comes into contact with the inner frame 2 when the pan 13 is attached or detached, and the inner frame 2 is scratched, the coating is peeled off, or the inner frame 2 is stained. Trouble can be prevented. In FIG. 1, reference numeral 36 denotes a heat insulating material provided in the cover 14, reference numeral 37 denotes a lock mechanism for holding the cover 14 in a closed state, and reference numeral 38 denotes a cover in response to an operation of releasing the lock mechanism 37. A spring for automatically opening 14 to automatically rotate upward to open, 39 is an operation unit provided on the front surface of the rice cooker main body 1, 40 is a body heater for keeping warm, and 41 is a thermal fuse for safety. is there. Next, the operation will be described. A predetermined amount of rice and water are accommodated in the pan 13 and heated by the rice cooker 4 to cook rice. Along with rice cooking, steam is generated and filled in the pot 13, and the steam flows out of the steam passage hole C of the inner lid 31 and fills between the inner lid 31 and the lower lid 18,
Further, the gas flows through the steam passage hole B of the steam port packing 25 and fills the space 23. Then, the steam flows out of the space portion 23 into the atmosphere through the steam passage hole A of the steam port cover 24. The lid heater 20 is energized at least when steam is generated in the pan 13, and the lid heater 20 heats the inner lid 31 and the lower lid 18, so that the surface of the inner lid 31 and the lower lid 18 Vapors hardly condense. On the other hand, the space 23 is not easily heated by the lid heater 20, so that steam is condensed on the inner surface of the space 23, resulting in a large amount of soup adhesion. At the time of cooking rice, not only steam but also inner lid 3
Along with the steam from the steam passage hole C, the starchy water discharged from the rice in the pot 13 is pushed up by the pressure in the pot 13 and accumulates on the upper surface of the inner lid 31. It flows into the space 23 through the passage hole B and accumulates in the space 23, and the upper surface of the inner lid 31 and the space 2
3 becomes dirty. When the heating by the rice cooker 4 is stopped and the heating of the pot 13 is almost stopped, the rice water is recovered into the pot 13 through the water return hole 28 and the steam passage holes B and C. If the collecting state is poor, the soup is still in the upper surface of the inner lid 31 and in the space 23 even when the rice cooker finishes, and when the lid 14 is opened, the soup is stored together with the soup. Water will flow down the lower surface of the lower lid 18. However, it can be understood that this can be improved by increasing the total opening area A1 of the steam passage hole A through which the steam finally flows out of the lid 14 into the atmosphere. This is what we focused on. That is, the amount of dew condensation and the amount of water required are as follows:
Whether the rice is water-absorbable or hard-to-absorb rice, whether the atmospheric environment is low pressure or high pressure, and the inside of the space 23, the upper surface of the inner cover 31, and the surface of the lower cover 18 It depends on conditions such as whether the state is dirty or beautiful. These points are unstable elements whose conditions cannot be specified even if they can be considered to some extent at the time of design, and they cause variations in the amount of soup that flows when the lid 14 is opened. Here, when the total opening area A1 of the steam passage holes A formed in the steam port cover 24 is large, the amount of steam released into the atmosphere increases, so that the lower cover 18 and the inner cover Since the amount of dew condensation on the lower surface of the space 31 and the space 23 is reduced, and the pressure of steam released from the space 23 to the atmosphere is reduced, the space 31 is pushed up to the upper part of the inner lid 31 and furthermore, The point that the amount of the nebulized water pushed up into the inside 23 effectively works, the amount of dew soup and the amount of the nebulized water condensed is reduced, and the lid 14 is stably opened when the lid 14 is opened. The amount of soup that flows down from the lower surface can be reduced. That is, the total opening area A1 of the steam passage hole A for finally discharging the steam from the lid 14 to the atmosphere is the total opening area B1 of the steam passage hole B for allowing the steam to flow into the space 23, and the lower area. Since the total opening area C1 of the steam passage hole C for allowing steam to flow between the lid 18 and the inner lid 31 is larger than the total opening area C1, the amount of steam released to the atmosphere is increased, and the steam in the portion filled with steam is increased. Since the amount of dew condensation is reduced and the amount of spilled water that is pushed up from the pot 13 is reduced, the lid 14
When the is opened, the amount of the soup falling from the lower surface of the lid 14 can be stably reduced. As described above, according to the present invention,
When the lid is opened, the amount of soup that flows down the bottom of the lid stably without variation can be reduced, eliminating the problem of significantly soiling the upper surface of the main body of the cooker, thus improving cleanability. In addition, there is no danger that the soup may enter the main body of the cooker and short-circuit the electric circuit, thereby improving safety. Further, since the amount of soup adhering to the lower surface of the lid and the inner lid is reduced, the calorific value of the lid heating means can be reduced as compared with the conventional case, whereby energy can be saved. Can suppress the lower surface temperature of the lid when continuous energization is performed, and can prevent abnormal temperature rise of the entire lid, thereby improving safety.

[Brief description of the drawings] FIG. 1 is a sectional view of a rice cooker according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a part of the rice cooker. [Explanation of symbols] 13 ... Pot 14 ... Lid 20 Lid heater (lid heating means) 23 ... space 31 ... Inner lid A: Steam passage hole B: Steam passage hole C ... Steam passage hole

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Tanaka 2570-1 Gosuda, Kamo-shi, Niigata Pref. Toshiba Home Techno Co., Ltd. (56) References Real Opening Sho 59-95929 (JP, U) Real Opening Sho 62-155725 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/00 103

Claims (1)

(57) [Claims 1] A pot, a lid for covering the pan, a lid heating means for heating the lower surface of the lid, a space provided in the lid, a steam passage hole a which communicates with the upper surface of the lid body and parts, and the steam passage hole B of the lower surface and the space portion was communicated in the lid, the space portion through the steam passage hole B
A water return hole for recovering the water flowing into the inside of the pot, and an inner cover for covering the pot below the lid is provided.
It has a steam passage hole C communicating with the lower space of the lid, and has a total opening area A1 of the steam passage hole A, a total opening area B1 of the steam passage hole B, and a total opening area C1 of the steam passage hole C. Relationship is A
1> C1 ≧ B1 , and the lower surface of the lid is heated by the lid heating means at least when steam is generated from inside the pan.