JP2011244966A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooker capable of closing a hole that communicates with an inner pot and the outside air with necessary minimum components.SOLUTION: In the cooker including a pot 11, a heating coil 14 for heating the pot 11, a lid body 21 for covering the pot 11, and an inner lid 31 which is provided opposite to the pot 11 and is freely attachable/removable to/from the lid body 21, a suction hole 42, a discharge hole 46, and a pressure regulating hole 47 are provided for the inner lid 31 as a plurality of holes, and a pressure regulating valve 70 for closing the pressure regulating hole 47 being the prescribed hole is provided so as to communicate with the inner lid 31 from above the inner lid 31. In this case, the pressure regulating hole 47 being the prescribed hole is closable by the pressure regulating valve 70 from above the inner lid 31 among a plurality of holes provided for the inner lid 31. Thus, the pressure regulating hole 47 communicating with inside the pot 12 and the outside air is closed with the minimum components.

Description

  The present invention relates to a cooker for heating an object to be cooked in an inner pot.

  As disclosed in, for example, Patent Document 1, a conventional cooker has a valve body in a hole in order to release the pressure in the inner pot and return it to the atmospheric pressure in a state where the inner pot is lower than the atmospheric pressure. This valve body was moved. Therefore, various parts such as a valve body and a moving means for the valve body have been incorporated.

JP 2009-195485 A JP 2008-18096 A

  However, conventionally, not only the valve body and the moving means but also the structure as a cooking device has been complicated in order to ensure safety when the hole is blocked.

  Therefore, an object of the present invention is to provide a cooker that can close a hole that communicates the inside of the inner pot and the outside air with a minimum number of parts.

  According to the first aspect of the present invention, among the plurality of holes provided in the inner lid, a predetermined hole can be closed with a closing member from above the inner lid, and a hole for communicating the inside of the inner hook and the outside air is the minimum necessary. It can be closed with limited parts.

  According to the second aspect of the present invention, the pressure in the inner pot can be reduced to the atmospheric pressure or lower by operating the pressure reducing means.

  According to the third aspect of the present invention, the pressure in the inner hook can be reduced to the atmospheric pressure or lower through another hole communicating with the pressure reducing means and the inside of the inner hook while the hole is closed with the closing member. By opening the hole, the inside of the inner pot can be maintained at atmospheric pressure regardless of the operation of the decompression means.

  In invention of Claim 4, the adhesiveness with a hole can be improved easily using the elastic force of a closing member.

  In the invention of claim 5, the hole closed by the closing member can be opened using the pressure in the inner hook, and the hole opening member can be made unnecessary.

  In the invention of claim 6, all of the predetermined holes can be reliably closed by utilizing the dead weight of the closing means.

  In the invention of claim 7, when the hole closed by the closing means is opened, the inside of the inner hook returns to atmospheric pressure in a short time, and the pressure applied to the hole increases particularly when the pressure in the inner hook is abnormal. The hole can be easily opened and returned to atmospheric pressure.

  In the invention of claim 8, even if a part of the hole remains closed when the pressure in the inner hook is abnormal, the other hole is opened and the inside of the inner hook can be reliably returned to the atmospheric pressure. It is possible to prevent the hole closed by the closing member from being closed when an abnormality occurs.

  In the invention of claim 9, by providing a convex portion on the closing member, the hole is easily opened when the closing member is pushed up when the pressure in the inner hook is abnormal, and the hole blocked by the closing member is difficult to close when abnormal. Become.

  According to the first aspect of the present invention, the hole that communicates the inside of the inner hook and the outside air can be closed with the minimum necessary parts.

  According to invention of Claim 2, the pressure in an inner hook can be made into atmospheric pressure or less.

  According to the third aspect of the present invention, the pressure in the inner hook can be reduced to the atmospheric pressure or lower in a state where the hole is closed with the closing member, and the inside of the inner hook is greatly increased by opening the hole. It can be maintained at atmospheric pressure.

  According to invention of Claim 4, the adhesiveness of a closing member and a hole can be improved easily.

  According to invention of Claim 5, the opening member of the hole obstruct | occluded by the closing member can be made unnecessary.

  According to the invention of claim 6, it is possible to reliably block all the predetermined holes by utilizing the dead weight of the closing means.

  According to the invention of claim 7, when the hole closed by the closing means is opened, the inside of the inner pot can be returned to the atmospheric pressure in a short time.

  According to the eighth aspect of the present invention, it is possible to make it difficult to close the hole closed by the closing member at the time of abnormality.

  According to the ninth aspect of the present invention, it is possible to make it difficult to close the hole closed by the closing member at the time of abnormality.

It is a whole sectional view of a cooking appliance which shows one example of the present invention. FIG. 3 is an enlarged cross-sectional view around the suction means and the pressure adjusting means. It is the figure which looked at the inner lid from the bottom face side same as the above. FIG. 6 is an enlarged cross-sectional view of the periphery of the pressure adjusting means showing another modification. It is the perspective view which looked at the inner lid assembly from the upper side same as the above. It is the same perspective view which looked at the inner cover assembly from the lower side same as the above. It is the perspective view which looked at the conventional inner lid assembly from the upper side. It is the perspective view which looked at the conventional inner lid assembly from the lower side. It is a block diagram which shows the electric constitution in a present Example.

  Hereinafter, preferred embodiments of a cooking device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a basic configuration of a rice cooker that cooks rice to make rice or the like as an example of a cooker. In the figure, reference numeral 1 denotes a main body that forms the outline of a rice cooker, which is formed by an upper frame 2 that constitutes the upper surface and the upper side surface thereof, and a substantially cylindrical outer frame 3 that constitutes the side surface. A bottom plate 4 is provided to cover the bottom opening at the bottom. At that time, the upper frame 2 and the bottom plate 4 are formed of a synthetic resin such as PP (polypropylene), while the outer frame 3 is formed of a metal member such as stainless steel, for example, in order to improve cleanability and appearance quality. The In addition, a substantially cylindrical pan housing portion 6 that is suspended from the inner peripheral portion of the upper frame 2 and is formed of a synthetic resin such as PP integrated with the upper frame 2, and an opening on the lower surface of the pan housing portion 6. A pan container 9 made of a nonmagnetic material and having a bottomed cylindrical shape for accommodating a pan 11 to be described later is formed by an inner frame 8 that is provided so as to be covered and is formed of a synthetic resin such as PET (polyethylene terephthalate).

  In the pot housing 9, a bottomed cylindrical pot 11 for storing an object to be cooked such as rice or water is detachably accommodated. The pan 11 is composed of aluminum having good thermal conductivity as a main material, and a heating element made of a magnetic metal plate such as ferritic stainless steel is joined from the lower part of the outer surface to the outer bottom surface of the main material. The reason why the heating element is not provided from the center to the top of the side surface of the pan 11 is to reduce the weight of the pan 11. An annular flange portion 12 is formed around the upper end of the pan 11 so as to extend to the outer periphery thereof. In addition, it has the structure which does not provide a heating means in the outer periphery of the pan accommodating part 6. FIG.

  A heating coil 14 as a heating means for electromagnetically heating the bottom of the pan 11 is provided at the lower and bottom portions of the side surface of the inner frame 8 facing the heating element. When a high frequency current is supplied to the heating coil 14, the heating element of the pan 11 is heated by the alternating magnetic field generated from the heating coil 14, and the pan 11 and thus the cooked food in the pan 11 are heated when cooking and keeping warm. It has become.

  In addition, a thermistor-type pan temperature sensor 15 is disposed as a temperature detecting means at the center of the bottom of the inner frame 8 so as to elastically contact the outer surface of the bottom of the pan 11. Accordingly, the heating amount of the heating coil 14 is adjusted to keep the pan 11 at a constant temperature.

  A cord heater 16 for heating the upper part of the side surface of the pan 11, particularly the flange portion 12, is arranged in an annular shape at the upper end of the pot housing 9. The cord heater 16 is composed of an electric heater, and is covered with a metal plate (not shown) that is used both as a fixing bracket made of, for example, an aluminum plate and a heat radiating member, and has a heat conductivity. . This metal plate is positioned to face a gap between the main body 1 and a lid 21 to be described later. And the flange part 12 lower surface of the pan 11 is mounted on the upper surface of the metal plate, and the pan 11 is housed in the pan housing 9 in a state where the pan 11 is suspended from the upper frame 2 of the main body 1. Yes. Therefore, there is almost no gap between the pan 11 and the upper end of the pan housing 9 in which the pan 11 is housed. Moreover, the flange portion 12 of the pan 11 has an outer shape that is equal to or larger than that of the cord heater 16, so that the cord heater 16 is covered with the flange portion 12 of the pan 11 from above. . However, although not shown in the figure, the handle portion (flange portion 12) of the pan 11 is made non-contact, and when the rice is cooked with water adhering to the outer surface of the pan 11, Steam is discharged from the gap.

  The lid body 21 that covers the pan 11 is formed by an outer lid cover 23 that includes an outer lid 22 as an outer appearance part that forms an outer shell of the pan 11, and an outer lid cover 23 that forms a lower surface that is an inner surface of the lid body 21. A metal heat sink 24 anodized with stainless steel or aluminum is provided. On the upper surface of the heat sink 24, a lid heater 25 as a lid heating means is provided. The lid heater 25 may be an electric heating heater such as a cord heater or a heating coil by electromagnetic induction heating.

  A hinge portion 26 connected to the lid 21 is provided behind the upper frame 2. The hinge portion 26 is provided with a pair of holes (not shown) in the left-right direction when viewed from the front, and a hinge spring (not shown) formed by a torsion coil spring or the like is housed therein. On the other hand, an outer lid cover hinge hole (not shown) as a hinge receiving portion is also provided behind the outer lid cover 23 so as to face the hole provided in the hinge portion 26. By inserting a rod-shaped hinge shaft 27 in common with the hinge hole and the hole of the hinge portion 26, the main body 1 and the lid 21 are pivotally supported with the hinge shaft 27 as a fulcrum. Furthermore, one end and the other end of the hinge spring are respectively hooked on the outer lid cover 23 and the outer frame 2, so that the lid body 21 is always urged in the opening direction. A lid opening button 28 is disposed in an exposed state on the front upper surface of the lid body 21. When the lid opening button 28 is pressed, the engagement between the lid body 21 and the main body 1 is released, and the lid body 21 is It is configured to open automatically.

  31 is a metallic inner lid that is detachably provided on the outer side, ie, the lower side of the heat radiating plate 24, and is anodized with stainless steel or aluminum. The inner lid 31 is provided so as to face the upper surface opening of the pan 11, and in order to close the gap with the pan 11, a lid packing 32 as a sealing member made of an elastic member such as silicone rubber or fluororubber is provided on the outer side thereof. Prepared for the entire circumference. The inner lid 31 and the lid packing 32 are integrated by a packing base 33, and these members are detachably provided as an inner lid assembly 34 on the inner surface of the outer lid cover 23 (see FIG. 5). When the lid 21 is closed (when the lid is closed), the lid packing 32 formed in an annular shape comes into contact with the upper surface of the flange portion 12 of the pan 11 and closes the gap between the pan 11 and the inner lid 31. The steam generated from the pan 11 is sealed.

  In addition, the heat dissipating plate 24 is a thermistor-type lid temperature sensor for controlling the temperature of the inner lid 31 by the lid heater 25 as lid temperature detecting means for detecting the temperature of the inner lid 31 attached to the lid 21. 35 is provided. Further, a steam port unit 36 that can be attached and detached from the upper surface side of the lid body 21 is provided on the rear side of the upper surface of the lid body 21.

  A suction means 41 is provided in the lid 21 and depressurizes the inside of the pan 11 to atmospheric pressure or less. The suction means 41 includes a suction device 43 facing the suction hole 42 provided in the inner lid 31, and a pump 44 as a pressure reducing drive source communicating with the suction device 43. Thus, the suction means 41 may be a pump type or may be a piston type. In addition to the suction hole 42, the inner lid 31 is provided with a discharge hole 46 and a pressure adjusting hole 47, respectively. That is, the inner lid 31 is provided with a suction hole 42, a discharge hole 46, and a pressure adjusting hole 47 as a plurality of holes for communicating the inside of the pan 11 and the outside of the rice cooker. In addition to the suction means 41, an adjustment means 49 for adjusting the pressure in the pan 11 by opening or closing the discharge hole 46 and the pressure adjusting hole 47 is provided inside the lid 21.

  Here, detailed configurations of the suction means 41 and the adjustment means 49 will be described with reference to FIG. In the same figure, the suction device 43 and the pump 44 constituting the suction means 41 are both provided on the upper surface of the outer lid cover 23 as a lid lower surface member, while the adjustment means 49 It is provided on the upper surface of the inner lid 31 so as to sink into a recess 23A formed at the bottom of the outer lid cover 23 when mounted. The suction device 43 includes a suction chamber 52 having an opening 51 facing the suction hole 42, a suction valve 53 provided facing the opening 51, and a space between the lower surface of the suction chamber 52 and the upper surface of the inner lid 31. And a ring-shaped seal member 54 that forms a flow passage between the suction hole 42 and the opening 51. The suction valve 53 is a valve body that opens and closes the opening 51 and thus the suction hole 42 communicating with the opening 51, and is formed of an elastically deformable plate-like member. The upper part of 51 (suction hole 42) is covered. A side wall of the suction chamber 52 is provided with another opening 55 that communicates with the pump 44, and the adjustment means 49 supplies a drive signal to the pump 44 in a state where the discharge hole 46 and the pressure adjustment hole 47 are blocked. When operated, the air in the suction chamber 52 is sucked through the opening 55, whereby the tip of the suction valve 53 is elastically deformed upward to open the opening 51, and the inside of the pan 11 closed by the inner lid 31 is opened. The pressure is reduced below atmospheric pressure.

  The adjusting means 49 includes a discharge device 58 for opening and closing the discharge hole 46, and a pressure adjusting device 59 for opening and closing the pressure adjustment hole 47. The discharge device 58 includes a discharge valve 61 made of an elastic member facing the discharge hole 46, a sliding portion 62 with the discharge valve 61 attached to the tip, and the discharge valve 61 and the sliding portion 62 moving up and down. A holder member 63 that is freely held, a partition member 64 provided at an intermediate portion of the holder member 63, and interposed between the upper surface of the partition member 64 and the base portion of the sliding portion 62 so that the discharge hole 46 opens. The exhaust valve 61 and the spring spring 65 as an urging member for urging the sliding portion 62 are configured. A discharge path 66 that connects the discharge hole 46 and the outside of the lid 21 when the discharge hole 46 is opened is formed in the lower portion of the side wall of the holder member 63.

  In this embodiment, three holes 42, 46, 47 are provided, but one of the suction holes 42 is a communication hole with the suction means 41, and the inside of the pan 11 is more than the atmospheric pressure by the suction means 41. It is provided for the purpose of lowering. The second discharge hole 46 is a hole communicating with the outside air outside the rice cooker, and can be opened and closed with a simple valve (discharge valve 61). When the pump 44 of the suction means 41 is driven in a state where the sliding portion 62 is pushed down against the bias of the spring spring 65 and the discharge hole 46 is closed by the discharge valve 61, the inside of the pan 11 is reduced from the atmospheric pressure. Conversely, when the sliding portion 62 is pushed up by the urging force of the spring spring 65 and the discharge valve 61 opens the discharge hole 46, the inside of the pan 11 communicates with the outside of the rice cooker and returns to atmospheric pressure.

  The pressure adjusting device 59 is mounted so as to be sandwiched around the pressure adjusting hole 47, and has a holder member 69 having an opening 68 communicating with the pressure adjusting hole 47, and a closing means that substantially opens and closes the opening 68 and thus the pressure adjusting hole 47. And the pressure regulating valve 70. The pressure regulating valve 70 is attached to the pressure regulating hole 47 of the lid 31 so as to communicate with the inner lid 31 from above the inner lid 31, that is, to open and close the pressure regulating hole 47 by its vertical movement. The pressure regulating valve 70 is intended to seal the opening 68, and is preferably formed of a rubber component having elasticity.

  The pressure regulating valve 70 has a tapered shape that extends circumferentially upward at a contact portion with the opening 68, and a substantially cylindrical column portion 72 is formed downward from a center portion 71 of the tapered shape. . A hook 73 having a diameter larger than that of the column 72 is provided at the lower end of the column 72, that is, at the tip of the pressure regulating valve 70. This hooking portion 73 is hooked on the holder member 69 and thus the inner lid 31 so that it does not fall even if the pressure regulating valve 70 is turned upside down. The pressure regulating valve 70 always seals the opening 68 and hence the pressure regulating hole 47 with its own weight, and can maintain the inside of the pan 11 at a state lower than the atmospheric pressure.

  FIG. 3 is a view of the inner lid 31 as viewed from the bottom side. 2 described above is a cross-sectional view taken along line AA shown in FIG. As shown here, the hole diameter of the discharge hole 46 is larger than the hole diameter of the suction hole 42, and the hole diameter of the pressure adjusting hole 47 is larger than the hole diameter of the discharge hole 46, and the relationship of suction hole diameter <discharge hole diameter <pressure adjusting hole diameter It has become. That is, the pressure adjusting hole 47 has a larger opening area than the other suction holes 42 and the discharge holes 46. In this way, even if the inside of the pan 11 is abnormally pressurized due to heating the inside of the pan 11 with the suction hole 42 and the discharge hole 46 closed, the central portion 71 of the pressure regulating valve 70 The force applied to the outer circumference increases due to the pressure adjustment hole 47 being wider than the opening area of the other suction holes 42 and the discharge holes 46, and the pressure adjustment valve 70 moves upward against its own weight and moves in the pot 11 It becomes possible to quickly return to atmospheric pressure.

  As a modification, as shown by the dotted line in FIG. 3, the pressure adjusting hole 47 is not limited to a single hole 47A, but may be formed by a plurality of holes 47A, 47B, 47C. In this case, the circularly opening hole 47A located at the center of the pressure adjusting hole 47 is inserted through the center 71 of the pressure adjusting valve 70, and the hook 73 is hooked around the hole 47A. In the periphery, other holes 47B and 47C are both formed in an oval shape. FIG. 4 shows the structure of the pressure adjusting device 59 corresponding to the modified example. Here, the holes 47A, 47B, 47C are formed in the holder member 69 as pressure adjusting holes 47 of the inner lid 31. A plate-like valve member 75 that opens and closes the holes 47A, 47B, 47C in common is mounted on the upper surface of the central portion 71 of the pressure regulating valve 70 so as to cover these holes 47A, 47B, 47C from above. . Also in this case, when the inside of the pan 11 is abnormally pressurized, the total opening area of the holes 47A, 47B, 47C constituting the pressure adjusting hole 47 is the opening of the other suction holes 42 and the discharge holes 46. Since it is larger than the area, the force applied to the pressure regulating valve 70 through the pressure regulating hole 47 is increased, and the pressure regulating valve 70 moves upward against its own weight, so that the inside of the pan 11 can be quickly returned to the atmospheric pressure. Become. Other configurations are the same as those shown in FIG.

Here, when the weight of the pressure regulating valve 70 as the closing means is M (g), the predetermined internal pressure in the pan 11 in which the pressure regulating valve 70 operates is P (g / cm ² ), and the opening area of the pressure regulating hole 47 If the sum (total) of A is A (cm ² ), the relationship is set such that M <P × A. In this way, when the inside of the pan 11 reaches a predetermined pressure P, the pressure regulating valve 70 can be surely pushed up by using the pressure P to open the pressure regulating hole 47. When the pressure regulating hole 47 is opened, A member for moving the pressure regulating valve 70 can be eliminated.

Furthermore, if the total area of the lower surface of the pressure regulating valve 70 that covers the opening above the pressure regulating hole 47 is B (cm ² ), the relationship is set so that A <B. By doing so, it is possible to reliably block all of the pressure adjusting holes 47 by utilizing the weight of the pressure adjusting valve 70. The number of the holes 47A, 47B, 47C constituting the pressure adjusting hole 47 may be any number. Further, the number of holes 42, 46, 47 provided in the inner lid 31 is not limited to three as in the embodiment, and may be two or four or more.

  FIG. 5 is a view of the inner lid assembly 34 in this embodiment as viewed from above, and FIG. 6 is a view of the inner lid assembly 34 as viewed from below. For comparison, FIGS. 7 and 8 show views of a conventional inner lid assembly 34 'viewed from above and below, respectively. In the conventional inner lid assembly 34 ', an adjusting means 49' including a ball-shaped pressure regulating valve 70 'is provided on the inner lid 31'. Although not shown, a member for moving the pressure regulating valve 70 'is incorporated in the lid. In the present embodiment, the number of parts as the inner lid assembly 34 is greatly reduced, and the structure is simplified to improve the cleanability and quality of the inner lid 31.

  Returning to FIG. 1 again, reference numeral 81 denotes a heating control means provided in front of the main body 1. The heating control means 81 includes a heating element 82 for driving the heating coil 14 that is a heating means, provided on the substrate 83. The element 82 that drives the heating coil 14 is heated along with the oscillation of the heating coil 14, but has a use condition temperature that guarantees an operating state, and therefore needs to be used at a certain temperature or lower. For this purpose, the element for driving the heating coil 14 is thermally connected to a fin-like radiator 84 made of a material having good thermal conductivity such as aluminum, and is emitted from a cooling fan 85 as a cooling means. The element is driven within the operating condition temperature by applying heat to the heat radiator 84 to remove heat.

  The cooling fan 85 is disposed below or on the side of the radiator 84 attached to the heating control means 81. Also, a hole for discharging the air that is emitted from the cooling fan 85 and deprived of heat from the radiator 84 attached to the heating control means 81 to the outside of the main body 1 at the bottom or side of the main body 1. A plurality of 86 are provided. The heating control means 81 is housed inside the product, that is, in the main body 1, but may be disposed at any position on the outer periphery of the pan 11. Further, the hole 86 may be arranged at any position. However, in recent years, there is a demand for miniaturization of products, and the heating control means 81, the cooling fan 85, and the hole 86 for discharging warm air are arranged at approximately opposite positions across the pan 11. Is preferred.

  An operation panel 91 is provided at the front of the main body 1. Inside the operation panel 91 is an LCD 92 for displaying the time and the selected rice cooking course, an LED 93 for displaying the current process, and an operation switch 94 for starting rice cooking and selecting the rice cooking course (see FIG. 9). ) Etc. are disposed. On the operation panel 91, an operation unit for displaying button names and the like is arranged. This operation unit also prevents dust and water from adhering to the control means which is an electronic component. The operation panel 91 may be provided on the front side of the lid 21.

  Next, the control system will be described with reference to FIG. In the figure, 81 is the above-mentioned heating control means, which accepts each temperature information from the pan temperature sensor 15 and the lid temperature sensor 35, an operation signal from the operation switch 94, etc. The heating coil 14 that heats the bottom of the pot 11, the cord heater 16 that heats the side of the pan 11, and the lid heater 25 that heats the lid 21, respectively, and includes the above-described pump 44, LCD 92, and LED 93. Each of the display means is controlled. In particular, the heating control means 81 of the present embodiment mainly controls the heating coil 14 based on the temperature detected by the pan temperature sensor 15 to control the temperature of the bottom of the pan 11 and based on the temperature detected by the lid temperature sensor 35. The lid heater 25 is controlled to control the temperature of the heat radiating plate 24 and thus the inner lid 31. The heating control means 81 includes, as a function on the control sequence of the program stored in its own storage means (not shown), a rice cooking control means 95 for cooking and heating the food in the pan 11 during rice cooking, Insulation cooked in the pot 11 at a predetermined time stored in advance in the storage means in response to the heat retention control means 96 that heats and heats the rice in the pot 11 to a predetermined heat retention temperature, and the reservation cooked rice start instruction from the operation switch 94 A reserved rice control means 97 capable of executing a reserved rice cooking course for controlling the rice cooking control means 95 is provided so that the food is cooked.

  Reference numeral 101 denotes a heating coil driving unit that incorporates a high-frequency inverter circuit that receives a control signal from the heating control unit 81 and supplies a predetermined high-frequency current to the heating coil 14. Separately from this, the output side of the heating control means 81 receives a control signal from the heating control means 81, and the lid heater driving means for driving the lid heater 25 to heat the heat radiating plate 24 and the inner lid 31. 102, code heater driving means 103 for turning on the code heater 16, pump driving means 104 for driving the pump 44, LCD driving means 105 for driving the display by the LCD 92, and display driving means 106 for driving the display by the LED 93 Are provided. At the time of cooking by the rice cooking control means 95 and at the time of heat insulation by the heat insulation control means 96, the heating coil 14 heats the bottom of the pan 11 by the temperature detection from the pan temperature sensor 15 and the lid temperature sensor 35, and the code heater 16 Heating to the side surface of the pan 11 by heating and heating to the lid body 21 by the lid heater 25 are configured. In addition, after the rice cooking by the rice cooking control means 95 is finished and the cooked food in the pan 11 is cooked as rice, it automatically shifts to heat insulation by the heat insulation control means 96 and is based on the temperature detected by the pot temperature sensor 15. By adjusting the heating of the pan 11 by the heating coil 14 and the cord heater 16, the rice is kept at a predetermined temperature (about 70 ° C. to 76 ° C.).

  In particular, to supplement the heating by the cord heater 16, until the temperature of the rice is lowered from about 100 ° C. to a temperature of about 73 ° C. after cooking the rice, the code heater 16 is caused to generate heat when the temperature is stable at about 73 ° C. Heat is radiated from the metal plate 20 into the space between the lid 21 and the main body 1 to suppress cooling due to the intrusion of outside air from the gap, and the flange portion 12 of the pan 11 is heated. In addition, the cord heater 16 also heats the flange portion 12 of the pan 11 during the period when the rice is reheated during heat insulation, so that moisture generated by the heating of the rice is prevented from condensing on the upper inner surface of the pan 11. ing.

  Further, the heating control means 81 in the present embodiment is a period until the cooking of the reserved rice by the reserved rice control means 97 is started, and the time until the rice cooking control means 95 starts substantial cooking. It also has a function as a decompression control means 107 that operates the pump 44 so that the inside of the pan 11 becomes lower than the atmospheric pressure after the period or the heat insulation control means 96 determines that the above-described heat insulation is stable.

  In the above configuration, when rice and water to be cooked are put into the pan 11 and, for example, a rice cooking key of the operation switch 94 is operated, rice cooking by the rice cooking control means 95 is started. Here, the rice cooking control means 95 is based on the temperature detection of the bottom of the pan 11 by the pan temperature sensor 15 in order to promote the water absorption of the rice in the pan 11 before starting the substantial rice cooking. The bottom and side portions of the pan 11 are heated with the cord heater 16 and the water temperature in the pan 11 is kept at about 45 to 60 ° C. for 15 to 20 minutes. Since the inside of the pan 11 is maintained at a reduced pressure at the time, the rice can sufficiently absorb water in the pan 11.

  Thereafter, when the predetermined time has elapsed, the rice cooking control means 95 starts a substantial rice cooking operation, and the decompression control to the pan 11 by the decompression control means 107 is interrupted, and the pan 11 is strongly heated by the heating coil 14. Then, boil and heat the food. When the temperature of the bottom of the pan 11 becomes 90 ° C or higher during this boiling heating and the temperature of the lid 21 is stabilized at 90 ° C or higher, it is assumed that the pan 11 is in a boiling state, and the heating amount is reduced more than before. Shift to continuous boiling heating.

  The fact that the temperature of the lid body 21 is stabilized at 90 ° C. or higher is detected by the rate of temperature rise of the detected temperature from the lid temperature sensor 35. In this boiling detection, the pan temperature sensor 15 and the lid temperature sensor 35 can confirm that the bottom of the pan 11 and the lid 21 are both 90 ° C. or higher, and the pan 11 has completely boiled. Can be detected accurately.

  Further, when any of the bottom part of the pan 11, the side part of the pan 11 or the lid body 21 reaches a detection temperature that cannot be normally 120 ° C. or higher, the heating control means 81 determines that there is some abnormality and cooks rice. The amount of heating in the heating is reduced so that all operations are stopped, or the operation is shifted to the unevenness described later, or the heat is kept to prevent abnormal heating. Conversely, either the bottom of the pan 11 or the lid 21 has reached 90 ° C. or more and a predetermined time (for example, 5 minutes) has passed, but either the bottom of the pan 11 or the lid 21 other than that. When the temperature is lower than 90 ° C, the pan temperature sensor 15 or the lid temperature sensor 35 in the low temperature state determines that the temperature detection accuracy has deteriorated for some reason (dirt, tilt, poor contact, etc.). Similarly, the amount of heating in rice cooking heating is reduced so that all operations are stopped, or the operation is shifted to unevenness, or the heat is kept, and this is dealt with.

  When shifting to continuation of boiling, the rice cooking control means 95 starts lid heating by the lid heater 25. The lid heating here is managed by the detected temperature of the lid temperature sensor 35 so that the temperature of the inner lid 31 is 100 to 110 ° C. And, when the bottom of the pan 11 causes a predetermined temperature rise, the cooking in the pan 11 is detected, the cooking process by the rice cooking control means 95 is terminated, and the heat insulation control means 96 shifts to the heat insulation process. It shifts to nomura. During unevenness, the lid heater 25 is cut off by temperature control based on the temperature detected by the lid temperature sensor 35 to prevent dew condensation on the inner lid 31, and the temperature is high enough that the rice does not burn (98-100 ° C). The temperature at the bottom of the pan 11 is controlled so that it is maintained. The unevenness is continued for a predetermined time (15 to 20 minutes), and when the unevenness is completed, the operation shifts to heat retention by the heat retention control means 96.

  When it is warming, the heating coil 14 heats the bottom and bottom side of the pan 11 and is slightly higher than the temperature of the rice stored in the pan 11, the lid heater 25 heats the lower surface of the lid 21, and The temperature of the side of the pan 11 is controlled by the cord heater 16 so that the rice does not dry and a large amount of dew does not adhere. The temperature of the rice in the pan 11 is maintained at 70 to 76 ° C. Even when the temperature is kept, the pan temperature sensor 15 and the lid temperature sensor 35 are abnormally high or abnormally low. Detects abnormalities and prevents this abnormal heating.

  When the rice cooking process is finished, the heat retention control means 96 starts measuring the heat retention elapsed time, and when the heat retention elapsed time reaches a preset time, the pressure in the pan 11 becomes lower than the atmospheric pressure by the pressure reduction control means 107. Thus, the pump 44 is controlled again. Such an operation may be performed when the pan temperature sensor 15 detects that the inside of the pan 11 has reached a predetermined temperature in the heat retaining step, not after a predetermined time of the heat retaining step.

  As described above, in this embodiment, the pan 11 as the inner pot, the heating coil 14 as a heating means for heating the pan 11, the lid body 21 covering the pan 11, the pan 11 is provided facing the pan 11, and the lid In a cooker having an inner lid 31 that is detachable from the body 21, a suction hole 42, a discharge hole 46, and a pressure adjusting hole 47 are provided as a plurality of holes in the inner lid 31, respectively. A pressure regulating valve 70 that closes a pressure regulating hole 47 that is a predetermined hole among the plurality of holes is provided so as to communicate with the inner lid 31.

  In this case, among the plurality of holes provided in the inner lid 31, the pressure regulating hole 47, which is a predetermined hole, can be closed from above the inner lid 31 with the pressure regulating valve 70 as a closing member. The pressure adjusting hole 47 communicating with the outside air can be closed with a minimum number of parts.

  Further, in the present embodiment, a suction means 41 provided with a pump 44 is provided as a pressure reducing means for reducing the pressure in the pan 11 to atmospheric pressure or less, and by operating the suction means 41, the pressure in the pot 11 is reduced. It can be below atmospheric pressure.

  Further, in the present embodiment, the pressure adjusting hole 47 closed by the pressure adjusting valve 70 is formed as a hole different from the hole (suction hole 42) communicating the suction means 41 and the inside of the pan 11. In this way, the pressure in the pan 11 is made lower than the atmospheric pressure lower than the outside air through another suction hole 42 that communicates the suction means 41 and the inside of the pan 11 with the pressure regulating valve 47 closing the pressure regulating hole 47. In addition, the pressure regulating valve 70 opens the pressure regulating hole 47, so that the inside of the pan 11 can be maintained at the atmospheric pressure regardless of the operation of the suction means 41.

  The pressure regulating valve 70 is preferably made of an elastic member such as rubber. The reason is that the adhesiveness with the pressure adjusting hole 47 can be easily increased by utilizing the elastic force of the pressure adjusting valve 70.

  The weight M of the pressure regulating valve 70 is preferably lighter than the product of the pressure P in the pan 11 and the sum A of the opening areas of the pressure regulating holes 47 closed by the pressure regulating valve 70. By doing so, the pressure in the pan 11 can be used to open the pressure adjusting hole 47 closed by the pressure adjusting valve 70, and a member for opening the pressure adjusting hole 47 can be eliminated.

  Further, the total opening area A of the pressure regulating holes 47 closed by the pressure regulating valve 70 is smaller than the lower surface area B of the pressure regulating valve 70. By doing so, it is possible to reliably block all of the pressure adjusting holes 47 by utilizing the weight of the pressure adjusting valve 70.

  In this embodiment, the pressure adjusting hole 47 closed by the pressure adjusting valve 70 has a larger opening area than the other discharge holes 46 and the pressure adjusting holes 47. Therefore, when the pressure regulating hole 47 that has been blocked by the pressure regulating valve 70 is opened, the inside of the pan 11 returns to the atmospheric pressure in a short time, and particularly when the pressure in the pan 11 is abnormal, the pressure applied to the pressure regulating hole 47 is large. Thus, the pressure adjusting hole 47 can be easily opened to return to the atmospheric pressure.

  In the modification, the pressure adjusting hole 47 closed by the pressure adjusting valve 70 is constituted by a plurality of holes 47A, 47B, 47C. Therefore, even if some of the holes 47A, 47B, 47C remain blocked when the pressure in the pot 11 is abnormal, the other holes 47A, 47B, 47C are opened and the inside of the pot 11 is reliably enlarged. The pressure can be returned to atmospheric pressure, and the pressure regulating hole 47 blocked by the pressure regulating valve 70 is less likely to be blocked when an abnormality occurs.

  Further, the pressure regulating valve 70 has a central portion 71 as a convex portion that decreases in diameter downward within the range of the pressure regulating hole 47 closed by the pressure regulating valve 70. By providing such a convex central portion 71 in the pressure regulating valve 70, when the pressure regulating valve 70 is pushed up when the pressure in the pan 11 is abnormal, the pressure regulating hole 47 blocked by the pressure regulating valve 70 is provided. Is easily opened, and the pressure adjusting hole 47 is less likely to be blocked when abnormal.

  In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention.

11 Pan (inner pot)
14 Heating coil (heating means)
21 Lid
31 Inner lid
41 Suction means (pressure reduction means)
42 Suction holes (multiple holes)
46 Discharge holes (multiple holes)
47 Pressure regulating holes (multiple holes, predetermined holes)
47A, 47B, 47C Hole
70 Pressure regulating valve (closing member)
71 Center (convex)

Claims (9)

In a cooking device comprising an inner pot, a heating means for heating the inner pot, a lid that covers the inner pot, and an inner lid that is provided facing the inner pot and is detachable from the lid.
A cooking device, wherein a plurality of holes are provided in the inner lid, and a closing member for closing the predetermined hole is provided so as to communicate the inner lid from above.   The cooking device according to claim 1, further comprising pressure reducing means for reducing the pressure in the inner pot to atmospheric pressure or less.   The cooker according to claim 2, wherein the hole closed by the closing member is different from a hole communicating the pressure reducing means and the inside of the inner pot.   The cooker according to any one of claims 1 to 3, wherein the closing member is made of an elastic member.   The cooking according to any one of claims 1 to 4, wherein the closing member has a weight lighter than a product of the pressure in the inner pot and the opening area of the hole closed by the closing member. vessel.   The cooker according to any one of claims 1 to 5, wherein a sum total of opening areas of the holes closed by the closing member is smaller than a lower surface area of the closing member.   The cooker according to any one of claims 1 to 6, wherein the hole closed by the closing member has a larger opening area than other holes.   The cooker according to any one of claims 1 to 7, wherein the hole that is closed by the closing member includes a plurality of holes.   The cooker according to any one of claims 1 to 8, wherein the closing member has a convex portion whose diameter is reduced downward within a range of the hole closed by the closing member.

Images