JP5564359B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker provided with decompression means.

  Conventionally, in the case of a rice cooker that cooks with the inside of the pan under pressure, and soaks and keeps warm before and after that, when the pan is under reduced pressure, when the inside of the pan is under reduced pressure, the lid and pan It is necessary to open the lid by operating the engaging means after releasing the sealed state, and when trying to open the lid, before releasing the engagement between the lid and the main body, In order to return the decompressed state to atmospheric pressure, a decompression release mechanism was provided (see Patent Document 1).

  Conventionally, as a means for detecting opening and closing of the lid, a method of detecting that the lid has been opened and closed by a temperature sensor using a temperature difference before and after the lid is opened and closed is known.

JP 2006-350 A

  However, in the structure of Patent Document 1, the decompression release mechanism is provided with the decompression release mechanism even when the lid opening button is pushed too much by using the lid opening button that is operated when opening the lid. In order to prevent an unreasonable load from being applied to the detection means, a magnetic flux detection method using an expensive magnet or a micro switch that requires a mounting space has been adopted.

The present invention is to solve the above problems, and purpose thereof is to provide a cooker having a compact vacuum release mechanism at low cost.

  In the rice cooker according to the first aspect of the present invention, a pan, a main body that houses the pan, a lid that covers the main body, a decompression unit that lowers the inside of the pan below atmospheric pressure, and a holding that holds a predetermined state. Means, a biasing means for biasing the lid in a predetermined direction, a releasing means for releasing the predetermined state, an inhibiting means for inhibiting the holding release of the holding means, and an inhibition release for releasing the inhibiting means A rice cooker provided with release urging means for urging the inhibition release means in a predetermined direction, wherein the release release means comprises the release release means. It is characterized in that it is set to be stronger than the operating force of the inhibition release means and weaker than the durability of the inhibition release means.

  The rice cooker according to the invention of claim 2 is characterized in that a self-hinge is provided in the case for storing the inhibition release means.

  The rice cooker according to the invention of claim 3 is characterized in that the inhibition releasing means has a waterproof structure.

  In the rice cooker of invention of Claim 4, the thickness of the sheet | seat member used for the said waterproof structure was 100-125 micrometers.

  According to the first aspect of the present invention, it is possible to reduce the size and improve the detection accuracy.

  According to the invention of claim 2, the number of parts can be reduced.

  According to the invention of claim 3, the water resistance can be improved.

  According to the invention of claim 4, it is possible to improve detection accuracy and ensure durability.

It is whole sectional drawing of the rice cooker in 1st Example of this invention. It is an expanded sectional view of the principal part at the time of a lid closing same as the above. FIG. 3 is an enlarged cross-sectional view of the main part when the lid is closed, which is a cross-section different from FIG. FIG. 4 is an enlarged cross-sectional view of the main part in a state where the lid opening button is not pushed when the lid is closed. FIG. 5 is an enlarged cross-sectional view of the main part in a state where the lid opening button is pushed for the first time when the lid is closed. FIG. 6 is an enlarged cross-sectional view of the main part in a state where the lid opening button is pushed for the second time when the lid is closed. It is sectional drawing of the state which opened the crank switch holder by the self hinge part same as the above. It is a perspective view which shows the completed movable part assembly same as the above. FIG. 4 is an enlarged cross-sectional view of a pressure adjusting unit during pressurization. It is an expanded sectional view of the pressure regulation part at the time of pressure reduction same as the above. FIG. 8 is an enlarged cross-sectional view of the pressure regulating unit and the safety valve at the time of pressurization represented by a cross section different from FIG. 7. It is a perspective view inside a cover body of the state which removed the outer cover same as the above. It is a principal part sectional drawing which shows another modification of a lid body same as the above. It is a principal part sectional drawing which shows another modification of a lid body rear part same as the above. It is a perspective view inside a cover body of the state which removed the outer cover same as the above. It is a perspective view which shows a structure of the periphery of a clamp and a pressure regulating solenoid and an opening / closing solenoid. It is a perspective view which shows a solenoid for pressure regulation and its surrounding structure same as the above. FIG. 2 is a perspective view showing the opening / closing solenoid and the surrounding structure. FIG. 3 is a cross-sectional view of the main part when the open / close solenoid is not energized. It is sectional drawing of the principal part at the time of energization of the solenoid for opening / closing same as the above. It is sectional drawing of a safety valve same as the above. It is a block diagram which shows an electrical structure same as the above. It is a timing chart showing the transition of the temperature and pressure in a pan, and the operation state of each part. It is a timing chart showing the transition of the temperature and pressure in a pan, and the operation state of each part. It is a principal part enlarged view near the cover body of the rice cooker in 2nd Example of this invention. It is sectional drawing of a lid | cover opening / closing detection means same as the above. It is sectional drawing which shows another modification of a lid | cover opening / closing detection means same as the above. It is sectional drawing which shows another modification of a lid | cover opening / closing detection means same as the above. It is a block diagram which shows an electrical structure same as the above. It is a flowchart at the time of a heat retention process same as the above. It is a block diagram which shows the electric constitution of the rice cooker in 3rd Example of this invention. It is a flowchart at the time of a pan setting same as the above.

  Hereinafter, preferred embodiments of the rice cooker according to the present invention will be described with reference to the accompanying drawings. Note that, in each of these embodiments, the same portions are denoted by the same reference numerals, and the description of the common portions is duplicated and is omitted as much as possible.

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

  FIG. 1 shows a basic overall configuration of a rice cooker common to each embodiment. In the figure, a main body 1 that forms the outline of a rice cooker includes an upper frame 2 that constitutes an upper surface and an upper side surface thereof, a substantially cylindrical outer frame 3 that constitutes a side surface, and a bottom plate 4 that covers a bottom opening of the outer frame 3. It consists of. Moreover, it is mentioned later by the substantially cylindrical pot accommodating part 5 formed by hanging down integrally from the upper surface inner peripheral part of the upper frame 2, and the inner frame 6 provided so as to cover the lower surface opening of the pot accommodating part 5. A pot-shaped container 7 made of a non-magnetic material and having a bottomed cylindrical shape for storing the pot 11 is formed.

  11 is a bottomed cylindrical pot which accommodates to-be-cooked rices, such as rice and water, and is detachably accommodated in the pot accommodating body 9 constituting the main body 1. This pan 11 is a pan body 12 mainly made of aluminum with good thermal conductivity, and a heating element 13 composed of a magnetic metal plate such as ferritic stainless steel joined from the lower side to the bottom of the outer surface of the pan body 12. It consists of. An annular flange portion 14 is formed around the upper end of the pan 11 so as to extend to the outer periphery thereof.

  A heating coil 16 as heating means for electromagnetic induction heating of the bottom of the pan 11 is provided on the lower and bottom sides of the inner frame 8 facing the heating element 13 on the outer surface. When a high frequency current is supplied to the heating coil 16, the heating element 13 of the pan 11 is heated by the alternating magnetic field generated from the heating coil 16, and the cooked rice in the pan 11 and thus the pan 11 is heated. Yes.

  In addition, a temperature sensor 17 serving as a pan temperature detecting means is disposed 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, and detects the temperature of the pan 11. The heating temperature of the bottom of the pan 11 by 16 is mainly controlled.

  A cord heater 18 for heating the upper part of the side surface of the pan 11, particularly the flange portion 14, is arranged in an annular shape at the upper end of the pot housing 9. The cord heater 18 is an electric heater, and is held on a heater ring 19 as a heat dissipation suppressing member mounted and mounted on the upper end of the pan container 7 and covers the cord heater 18 from above. A metal plate 20 attached to the heater ring 19 is provided to constitute a flange heater. The metal plate 20 is positioned to face a gap between the main body 1 and a lid 21 described later. Then, the lower surface of the flange portion 14 of the pan 11 is placed on the upper surface of the metal plate 20, whereby the pan 11 is accommodated in the pan accommodating body 7 while being hung on the upper frame 2 of the main body 1. It is like that.

  As shown in detail in FIGS. 2 and 3, the lid 21 includes an outer lid 22 that forms an upper shell of the lid 21 and a three-dimensional metal lid that covers the upper surface of the outer lid 22. 23, a heat radiating plate 24 whose outer surface forms the inner surface (lower surface) of the lid body 21, and an outer lid cover 25 as a lid base material that combines the outer lid 22 and the heat radiating plate 24 to form the skeleton of the lid body 21 Is the main component. A lid heater 26 as a lid heating means is provided inside the lid 21 and on the upper surface of the heat radiating plate 24. The lid heater 26 may be an electric heating heater such as a cord heater or a heating coil by electromagnetic induction heating.

  A hinge portion 28 connected to the lid 21 is provided behind the upper frame 2. The hinge portion 28 is provided with a pair of holes (not shown) in the left-right direction when viewed from the front, and a hinge spring 29 as an urging means formed by a torsion coil spring or the like is accommodated 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 25 so as to face the hole provided in the hinge portion. By inserting a rod-shaped hinge shaft 30 in common with the hinge hole and the hole of the hinge portion 28, the main body 1 and the lid 21 are pivotally supported with the hinge shaft 30 of the hinge portion 28 as a fulcrum. The Further, one end and the other end of the hinge spring 29 are respectively hooked on the outer lid cover 25 and the upper frame 2, so that the lid body 21 is always urged in the opening direction by using the elastic repulsive force of the hinge spring 29. .

  On the front upper surface of the lid body 21, a lid opening button 32 is disposed in an exposed state. When the lid opening button 32 is pressed, the engagement between the lid body 21 and the main body 1 is released, and the lid is closed by a hinge spring 29. The body 21 is configured to automatically open.

  Here, the opening / closing structure of the lid 21 and the main body 1 in the present embodiment will be described in more detail with reference to FIGS. The lid 21 is provided with a clamp 34 corresponding to the engaging portion. The clamp 34 is pivotally supported with respect to the outer lid cover 25 around a clamp shaft 35 provided inside the lid 21. A lid opening button 32 corresponding to an operating means for opening and closing the lid body 21 is disposed in an exposed state from the front upper surface of the lid body 21 so that the user can operate it. Clamp biasing means 36 such as a spring for biasing the base end portion 34A of the clamp 34 toward the lid opening button 32 is provided inside the lid body 21, so that a force for constantly pushing the lid opening button 32 upward is provided. It comes to work.

  In addition to the base end portion 34A that contacts the lid opening button 32, the clamp 34 penetrates through a clamping hole 37 on the lower surface of the outer lid cover 25 and projects downwardly, and a substantial portion of the clamp 34. It corresponds to the tip portion, and is configured by an engaging portion 34C extending from the lower end of the hanging portion 34B to the inside of the main body 1 from the starting point. The clamp 34 is formed of a metal part such as stainless steel, and the engaging portion 34C is substantially L-shaped. By doing so, compared with the case where the clamp 34 is made of a synthetic resin, the engagement with the clamp receiver 38 having a higher strength can be obtained. Further, when viewed from the front side of the rice cooker and the main body 1, the engaging portions 34 </ b> C of the clamp 34 are provided at substantially equal positions on the left and right sides from the center. The hanging portion 34B and the engaging portion 34C are provided on the lower side of the clamp 34 and are provided in a pair on the left and right. A clamp shaft 35 serving as a rotation center of the clamp 34 is disposed along the upper end of the drooping portion 34B, and the engaging portion 34C swings substantially in the front-rear direction of the main body 1.

  On the other hand, a clamp receiver 38 corresponding to an engagement receiving portion is disposed in front of the upper frame 2 and is located on the substantially opposite side of the hinge portion 28 provided on the upper frame 2, and the lid 21 is attached to the main body. When closing to the side 1, the clamp 34 rotates about the clamp shaft 35 as a central axis by the biasing force of the clamp biasing means 36, and engages with the clamp receiver 38. It is designed to be kept closed. The clamp receiver 38 is formed of a metal part such as stainless steel. By doing so, compared with the case where the clamp receiver 38 is made of a synthetic resin, the engagement with the clamp 34 having a higher strength can be obtained. On the contrary, when the lid 21 is opened, the lid opening button 32 is pushed, the proximal end portion 34A of the clamp 34 is pushed downward to rotate the clamp 34 in the reverse direction, and the engaging portion 34C is moved to the main body 1. To disengage the clamp 34 and the clamp receiver 38 from each other. The lower part of the clamp receiver of the upper frame 2 needs to have a depth that does not collide when the clamp 34 rotates about the clamp shaft 35. Further, the gap between the clamp 34 and the clamp receiver 38 is set to have a dimensional relationship that is larger than the normal engagement amount of the clamp 34 and the clamp receiver 38. Further, the dimensional relationship is set to be larger than the gap between the outer lid cover 25 and the upper frame 2.

  Here, the movable clamp 34 on the lid 21 side is referred to as an engaging portion, and the fixed clamp receiver 38 on the main body 1 side is used as the engaging receiving portion. The main body 1 may be provided with a movable engagement receiving portion. In any case, the clamp 34 and the clamp receiver 38 constitute engaging means for maintaining the closed state of the main body 1 and the lid 21.

  Next, the detection configuration for detecting the displacement of the lid opening button 32 will be described with reference to FIGS. 4A to 4C and FIGS. 5 and 6 in addition to FIGS. On the back (inside) side of the lid opening button 32, a substrate 43 on which the LED 41 and the tact switch 42 are mounted is disposed. The LED 41 is disposed to face the upper surface portion of the lid opening button 32, and is provided as an alarm unit that is turned on when a pressure reducing unit 91 described later operates. Further, when the tact switch 42 is operated to push the lid opening button 32 to release the engagement between the clamp 34 and the clamp receiver 38, the clamp switch 42 is pressed against the base end 34A. The operation is detected and a detection signal is output. That is, the tact switch 42 here is provided as a detecting means 45 that detects a change in the lid opening button 32. Note that the detection means 45 having an equivalent function may be configured by another sensor. In addition, the tact switch 42 of the present embodiment is provided in the lid opening button 32. However, the tact switch 42 is not limited as long as the detection means 45 exhibits its original purpose.

  Here, the substrate 43 is accommodated so as to be sandwiched between the upper accommodating body 47 and the lower accommodating body 48 of the clamp switch holder 46 formed of a synthetic resin such as PP (polypropylene), and arranged so as to float inside the lid opening button 42. Established.

  Here, the clamp switch holder 46 has a hollow box shape and has an upper housing body 47 having an opening 49 on the bottom surface, and a plate-like lower housing body 48 formed so that the opening 49 can be opened and closed. The front end of the opening edge of the upper container 47 and the front end of the lower container 48 are connected in a thin shape as a hinge part that allows the lower container 48 to rotate in the vertical direction to the upper container 47. The self-hinge part 50 is formed.

  The substrate 43 is disposed on the upper surface of the lower container 48, and the operation part 51 of the tact switch 42 is inserted into a through part 52 formed on the rear side of the lower container 48, and the bottom surface of the lower container 48 It protrudes further downward.

  As described above, the substrate 43 is provided so as to be accommodated in the accommodating space 53 formed by being surrounded by the upper accommodating body 47 and the lower accommodating body 48 in a state where the opening 49 of the upper accommodating body 47 is closed by the lower accommodating body 48. ing.

  The substrate 43 is configured to be movable in and out of the upper housing 47 by allowing the upper housing 47 to rotate in the vertical direction around the self hinge 50 together with the lower housing 48.

  Further, on the upper surface of the lower storage body 48, there are a front guide member 47A and a rear guide member 47B that stand on the inner side of the front edge and the rear edge of the opening edge in a state where the opening 49 of the upper storage body 47 is closed. Is provided.

  In the clamp switch holder 46, a substantially cylindrical biasing means mounting portion 48A that allows a biasing means 53 such as a spring to be mounted is suspended from a substantially central portion of the bottom surface of the lower housing 48. One of the urging means 53 is fitted and connected to the urging means attaching portion 48A, and the other of the urging means 53 is in contact with the upper surface of the clamp 34, so that the lower housing 48 is always more than the urging means 53. The upward biasing force is biased. For this reason, the tact switch 42 is provided in the lid opening button 32 so as to be freely movable in the vertical direction via the biasing means 53.

  As a waterproof mechanism between the operation part 51 of the tact switch 42 and the clamp 34, it is processed into an embossed shape so as to cover the lower part of the operation part 51, and as a synthetic resin sheet having a substantially hat-shaped cross section A PET (polyethylene terephthalate) sheet 54 is provided.

  The thickness of the PET sheet 54 is 90 to 125 μm (micrometer). Here, when the thickness of the PET sheet 54 is less than 90 μm, the PET sheet 54 is too thin and the durability is impaired. When the thickness is 125 μm or more, the PET sheet 54 is too thick and the detection accuracy is impaired.

  Here, in order to transmit the LED 41 as the alarm means to the outside, the clamp switch holder 46 is formed of a transparent member, and the convex light guide part 32A that forms the center part of the lid opening button 32 faces the LED 41. It is formed.

  Further, the above-described lid opening button 32 is attached and fixed to the clamp switch holder 46. Accordingly, the lid opening button 32 and the substrate 43 are configured as an integral movable part assembly 55 including the clamp switch holder 46, and the substrate 43 on which the tact switch 42 is mounted moves along with the pushing operation of the lid opening button 32. It will be.

  Reference numeral 61 denotes an inner lid assembly as a lower member of the lid body 21 provided on the outside, that is, the lower side of the heat radiating plate 24. The inner lid assembly 61 has a disk shape that is substantially the same diameter as the upper opening of the pan 11 and seals between the pan 11 and the inner lid 62 with a metallic inner lid 62 anodized with stainless steel or aluminum. For this purpose, a cover packing 63 made of an elastic member such as silicone rubber or fluorine rubber, and a pressure adjusting unit 64 for adjusting the internal pressure of the inner hook are provided on the entire outer periphery of the inner lid 62. When the lid 21 is closed (when the lid is closed), the ring-shaped lid packing 63 abuts against the upper surface of the flange portion 14 of the pan 11 and closes the gap between the pan 11 and the inner lid 62. The steam generated from the pan 11 is sealed.

  The heat radiating plate 24 is provided with a thermistor-type lid temperature sensor 65 for performing temperature management of the inner lid 62 by the lid heater 51 as lid temperature detecting means for detecting the temperature of the inner lid 62 of the lid 21 in particular. It is. Further, a vapor discharge unit 66 as a vapor discharge unit that can be attached and detached from the upper surface side of the lid 21 is provided at a portion closer to the rear of the upper surface of the lid 21. The steam discharge unit 66 and the pressure adjustment unit 64 communicate with each other inside the lid body 21, and the steam discharge for discharging the steam generated in the pan 11 to the outside by the steam discharge unit 66 and the pressure control unit 64. A mechanism is formed.

  Here, the configuration of the pressure adjusting unit 64 will be described in more detail with reference to FIGS. The pressure adjusting unit 64 includes a pressure adjusting valve 69 for adjusting pressure, a pressure adjusting valve holder assembly 70 that holds the pressure adjusting valve 69, and a dome-shaped pressure adjusting valve cover 71 that covers the pressure adjusting valve 69. The pressure regulating valve 69 is a material excellent in corrosion resistance and may be a part having a certain weight, and is formed of, for example, a ball made of austenitic stainless steel.

  The pressure regulating valve holder assembly 70 includes a first holder 72, a second holder 73, a first pressure regulating packing 75 corresponding to a pressure reducing support member, a second pressure regulating packing 76, and a pressure from the inside of the pan 11. In order not to directly apply to the 1 pressure regulation packing 75, there is a valve support 77 below the first pressure regulation packing 75 and corresponding to a pressure support member, and a valve support on the lower surface of the first pressure regulation packing 75. And a pressure regulating spring 78 as an elastic body that urges the valve support 77 in the direction in which 77 abuts. The valve support 77 is provided with a communication hole 74 that contacts the lower side of the ball-shaped pressure regulating valve 69 when the inside of the pan 11 is pressurized. The communication hole 74 is for communicating the pan 11 and the inner lid 62, and the steam passing through the communication hole 74 is discharged from the steam discharge unit 66 to the outside air. The first holder 72 and the second holder 73 are provided with a convex engaging portion 79 and a concave engaged portion 80 for fitting each other. The first holder 72 and the second holder 73 are mounted in a hole 81 provided in the inner lid 62 as a holding member for holding the first pressure regulating packing 75, the valve support 77, and the like. The first holder 72 is entirely formed in a cap shape, and has a through hole 72A in the center thereof. The first pressure regulating packing 75 is formed by a peripheral portion 72B of the through hole 72A and an upper end portion 73A of the second holder 73. The base is clamped. The second holder 73 has a cylindrical shape, and a flange 73B that contacts the lower surface around the hole 81 of the inner lid 62 is formed on the lower side of the second holder 73, and the ring-shaped second holder 73 is formed on the upper outer periphery of the flange 69. A concave groove 73C for fitting the pressure regulating packing 76 is formed. Further, a projecting piece 73D having an L-shaped cross section is formed on the inner peripheral side of the second holder 73 in order to fit one end of the pressure adjusting spring 78.

  In assembling the pressure regulating valve holder assembly 70, first, the pressure regulating packing 72 fitted into the concave groove 73C of the second holder 73 is inserted into the hole 81 provided in the inner lid 62, and the inner circumference of the second holder 73 is inserted. The valve support 77 is inserted from above the second holder 73 so as to sandwich the pressure adjusting spring 78 on the side. Next, the first pressure regulating packing 75 is placed on the valve supporting body 77 so as to cover the valve support 77 and the upper end portion 73A of the second holder 73, and the first pressure regulating packing 75 is further sandwiched from this state. In this manner, the first holder 72 is covered from above, the engaging portion 79 and the engaged portion 80 are fitted to each other, and the first holder 72 is attached to the second holder 73. As shown in FIGS. 7 and 8, when the pressure regulating valve holder assembly 70 is assembled, the inner surface of the second holder 73 and the lower surface of the valve support 77 are directly opposed to the inside of the pan 11. The first pressure regulating packing 75 disposed on the upper side of the two holders 73 and the valve support 77 has a structure that does not require direct pressure from the inside of the pan 11.

  The pressure regulating valve 69 is held by the pressure regulating valve holder assembly 66 assembled in this manner, and the pressure regulating valve cover 71 is covered from above to constitute the pressure regulating section 64. At this time, the pressure regulating valve holder assembly 66 and the pressure regulating valve cover 71 may be attached by claw fitting or may be stopped using a fastening member such as a screw or a rivet. The pressure regulating valve cover 71 is for restricting the movement range of the pressure regulating valve 69, and is provided with a plurality of holes (not shown) for guiding the steam discharged from the communication holes 74 to the steam discharge unit 66. Further, since the inner lid 62 is held by the pressure regulating valve holder assembly 66 and the pressure regulating valve cover 71, the hole 81 of the inner lid 62 is not exposed.

  The opening area of the communication hole 74 of the valve support 77 is smaller than the area of the surface 84 that receives pressure directly from the inside of the pan 11 inside the leg 83 formed on the lower side of the valve support 77. Thereby, the pressure in the pan 11 can be adjusted by the opening area of the communication hole 74 and the weight of the pressure regulating valve 69.

  A solenoid 82 for adjusting the sealing degree of the lid 21, that is, adjusting the internal pressure of the pan 11 by moving the pressure regulating valve 69 is provided inside the lid 21. When the solenoid 82 is not energized, its tip is held in the advanced position, and the pressure regulating valve 69 is retracted from the communication hole 74, while when the solenoid 82 is energized, its tip is retracted and the pressure regulating valve 69 is retreated. 74 is caused to roll by its own weight, the communication hole 74 is closed, and pressure is put into the pan 11.

  Both the first pressure regulating packing 75 and the second pressure regulating packing 76 are made of an elastic member such as silicone rubber. Thus, particularly when the pressure in the pan 11 shown in FIG. 8 is reduced, the pressure regulating valve 69 is brought into close contact with the first pressure regulating packing 75 due to the elastic deformation of the first pressure regulating packing 75, and the opening in the first pressure regulating packing 75. That is, the sealing performance of the hole 75A is improved.

  In addition, the inner lid assembly 61 is provided with a safety valve 85 that opens when the pressure in the pan 11 is increased to an abnormal pressure that is equal to or higher than a set value for some reason, and reduces the internal pressure of the pan 11. The pressure adjusting unit 64 and the safety valve 85 are provided facing the inlet side of the steam discharge unit 66 when the inner lid 62 is attached to the lower side of the outer lid cover 25. The inner lid 62, the lid packing 63, the pressure adjusting unit 64, and the safety valve 85 are integrated with a packing base 86 provided on the outer periphery of the inner lid assembly 61, and are detachably provided on the inner surface of the outer lid cover 25. The annular packing base 86 is for mounting the inner lid 62 and the lid packing 63. Here, in addition to the mounting portion of the inner lid 62 and the mounting portion of the lid packing 63, the outer lid cover 25 An attachment portion and a handle portion are formed so that the user can easily attach and detach the inner lid assembly 61.

  91 is a pressure reducing means provided in order to make the inside of the pan 11 lower than the normal atmospheric pressure with the lid 21 closed on the main body 1. The decompression means 91 includes a decompression pump 92 as a decompression drive source provided at the rear portion of the lid 21 and a hole (not shown) provided in the inner lid 62 from the decompression pump 92 through the main body 1 and the lid 21. And a tubular path 94 to the end. In addition, an electromagnetic valve 95 (see FIG. 6) as an opening / closing means for opening and closing the base end portion of the path 94 is provided inside the lid body 21. Connected to the solenoid valve 95 is a cylindrical decompression packing (not shown) protruding downward from the heat radiating plate 24 toward the periphery of the hole of the inner lid 62.

  When the inner lid assembly 61 including the inner lid 62 is attached to the lower surface of the lid body 21, the decompression packing is hermetically abutted against the upper surface of the inner lid 62 while being elastically deformed. A path 94 is formed. When the lid 21 is closed with the inner lid assembly 61 attached, the lid packing 63 is in close contact with the pan 11 and the pressure regulating valve 69 closes the communication hole 74. 82 communicates with the route 82. When the decompression pump 92 is started from this state, the solenoid valve 95 and thus the path 94 are opened, and the air in the pan 11 is exhausted to the outside of the main body 1 through the path 94 and the decompression pump 92, and the inside of the sealed pan 11 The pressure drops. Further, when the pressure in the pan 11 drops below the atmospheric pressure by a certain value, the electromagnetic valve 95 and thus the path 94 are closed to keep the pan 11 in a reduced pressure state. Furthermore, even when the pressure in the pan 11 rises due to the slow leak, the solenoid valve 95 and thus the path 94 are opened, and the pressure reducing pump 92 is activated to maintain the pan 11 in a state lower than the atmospheric pressure. .

  In such a state where the inside of the pan 11 is lower than the atmospheric pressure, the air inside the leg portion 83 constituting the valve support 77 is sucked into the pan 11 and the pressure regulating valve 69 and this pressure regulating valve 69 are mounted accordingly. The valve support body 77 to be placed is lowered against the bias of the pressure adjusting spring 78. However, when the opening 70 of the valve support 77 moves to a position lower than the hole 71A of the first pressure regulating packing 75, the pressure regulating valve 69 is mounted on the first pressure regulating packing 75 in place of the previous valve support 77. Is installed, and the hole 71A of the first pressure regulating packing 75 is closed, so that the inside of the pan 11 is secured and pressure reduction can be continued (see FIG. 8).

  Conversely, when the inside of the pan 11 is pressurized to atmospheric pressure or higher, for example during rice cooking, the inside of the valve support leg 79 receives direct pressure from the inside of the pan 11, so that the valve support 77 against the dead weight of the pressure regulating valve 69. Rises. Here, when the opening 70 of the valve support 77 moves to a position higher than the hole 71A of the first pressure regulating packing 75, the pressure regulating valve 69 replaces the previous first pressure regulating packing 75 with the valve support 77. The pressure regulating valve 69 that is placed and closes the communication hole 74 and that is placed on the valve support 77 rises in the same manner as the valve support 77. After the valve support 77 is lifted, it comes into contact with the first pressure regulating packing 75, thereby blocking the steam and the like trying to pass through the hole 71 </ b> A of the first pressure regulating packing 75, thereby maintaining the sealing inside the pan 11. Yes (see FIG. 7).

  Next, the structure around the decompression pump 92 constituting the decompression means 91 will be described with reference to FIGS. The decompression pump 92 is fixed to a pump case 96 in the vicinity of a steam discharge unit 66 that discharges steam generated from the inside of the pan 11 to the outside. The pump case 96 is arranged behind the outer lid cover 25. A bush 97 made of an elastic member is attached to a fixed portion of the pump case 96 to which the decompression pump 92 is attached in order to reduce vibration transmission from the decompression pump 92. The decompression pump 92 is provided with a suction port 92A for sucking air and a discharge port 92B for discharging the sucked air to the outside. The electromagnetic valve 95 and the suction port 92A are communicated with each other through a tube path 94. The air in the pan 11 located below the inner lid 62 is sucked. In addition, since the air discharged from the decompression pump 92 contains some water that evaporates from the object to be cooked, the air is discharged through the path 98 that connects the discharge port 92B and the boss formed in the outer lid cover 25 in the air. The moisture is discharged to the outside of the lid 21.

  The pump case 96 is an auxiliary part for installing the decompression pump 92 on the outer lid cover 25, and does not force its use. In this embodiment, because the lid reinforcing plate 99 is provided as a reinforcing member for covering the outer lid cover 25, it is difficult to directly install the decompression pump 92 on the outer lid cover 25. Yes.

  In the present embodiment, a pump cover 105 and a pump cover case 106 are provided separately from the outer lid 22 in order to assert the presence of the decompression pump 92 disposed on the lid 21. The pump cover case 106 is provided so as to surround the decompression pump 92 together with the pump case 96, and the pump case 105 is located above the pump cover case 106 and forms a part of the outer part of the lid 21. . A waterproof packing 107 (see FIG. 1) made of an elastic member is provided in the groove portion of the outer lid 22, and the waterproof packing 107 is sandwiched between the edges of the pump case 96 and the pump cover case 106, thereby And intrusion of steam and so on.

  Since all the decompression means 81 including the decompression pump 92 are disposed in the lid body 21, the path 94 from the decompression pump 92 to the electromagnetic valve 95 can be routed with the shortest distance. Further, the path 94 does not pass through the hinge portion 28 that is movable in the middle of the path 94, so that the path 94 can be prevented from being damaged.

  Next, another modified example related to the structure around the decompression pump 92 is shown in FIGS. 11 and 12, respectively. The steam discharge unit 66 covers a bowl-shaped steam port 108 that forms a flow path of steam from the inside of the pan 11 and a plurality of steam discharge holes that cover the upper opening of the steam port 108 and are steam passage holes on the upper surface thereof. The decompression pump 92 is disposed at the rear of the steam discharge unit 66. In particular, in the first modified example shown in FIG. 11, a finger hooking portion 109 </ b> A is extended behind the steam port cap 109 so that the steam discharge unit 66 can be easily removed from the lid body 21. It is located below 109A. Thereby, the decompression pump 92 can be accommodated in the lid 21 in a compact manner, and the increase in the size of the lid 21 and the influence on the appearance design can be suppressed.

  Further, in the second modification shown in FIG. 12, the decompression pump 92 is disposed on the upper portion of the hinge portion 28. In this case, a relatively heavy decompression pump 92 is disposed in the vicinity of the hinge shaft 30 of the hinge portion 28, which is the rotation center of the lid body 21, so that the lid body 21 is urged to automatically open. The moment of the hinge spring 29 can be made weaker than usual, and cost increase factors such as increasing the thickness of the lid 21 and the main body 1 and adding auxiliary parts can be suppressed.

  1 to 3 again, an operation panel 101 is provided at the front portion of the main body 1. Inside the operation panel 101, there are an LCD 102 for displaying the time and the selected menu, an LED for displaying the current process (not shown), and an operation switch 103 for starting cooking and selecting a menu. Further, a substrate on which a depressurization selection switch for selecting a depressurized state in the pan 11 is disposed. The operation panel 101 displays button names and the like to prevent dust and water from adhering to the control means that is an electronic component. The operation panel 101 may be provided on the front side of the lid 21.

  111 is a heating control means provided in the front inside the main body 1. The heating control unit 111 includes a heating element (not shown) for driving the heating coil 16, which is a heating unit, on a substrate. The element that drives the heating coil 16 is heated along with the oscillation of the heating coil 16, but has a use condition temperature that guarantees the operating state, and therefore needs to be used at a certain temperature or lower. For this purpose, the element that drives the heating coil 16 is thermally connected to a fin-like radiator 112 made of a material having good thermal conductivity such as aluminum and emits from a cooling fan 113 that is a cooling means. The element is driven within the operating temperature by applying wind to the radiator 112 to remove heat. Further, a cord reel 116 for winding a power plug (not shown) is provided inside the main body 1.

  In addition to the decompression means 91, an inhibition means 121 that restricts the movement of the clamp 34 is provided inside the lid 21. The configuration of the inhibiting means 121 will be described with reference to FIGS. 13 to 18. The pressure regulating solenoid 82 moves the pressure regulating valve 69 to adjust the sealing degree of the lid body 21, that is, the internal pressure of the pan 11. The plunger 151 is moved in and out from the inside by force, and the pressure regulating valve 69 in the pressure regulating section 64 is moved. Further, inside the lid 21, a pressure regulating frame 152 that moves together with the plunger 151 toward the outer lid cover 25, and a flexible pressure regulating packing 153 for keeping the inside of the lid 21 in a watertight state (FIG. 2). And FIG. 3). As shown also in FIG. 13, the pressure adjusting solenoid 82 and the pressure adjusting frame 152 are accommodated and arranged in a pressure regulation accommodating portion 154 formed in the lid 21 by the outer lid cover 25.

  As shown in FIGS. 14 and 15, the pressure adjustment frame 152 includes a pressure adjustment operation unit 161 as an operation unit protruding toward the pressure adjustment valve 69, and a frame unit 162 provided so as to surround the pressure adjustment solenoid 82. And a pressure adjusting frame lock piece 163 provided on the substantially opposite side of the pressure adjusting operation part 161.

  Further, here, an opening / closing solenoid 172 is arranged in another opening / closing means accommodating portion 171 formed in the lid 21 by the outer lid cover 25. Similarly to the pressure adjusting solenoid 82, the opening / closing solenoid 172 also has a configuration in which the plunger 173 is caused to appear and retract from the inside by electromagnetic force. Further, inside the lid body 21 is movable together with the plunger 173, and the opening / closing frame 175 housed and arranged in the pressure regulation housing portion 154 together with the opening / closing solenoid 172, and a flexible for holding the inside of the lid body 21 in a watertight state. An open / close packing 176 (see FIGS. 17 and 18) is provided.

  On the other hand, as shown in FIGS. 17 and 18, the inner lid 62 is provided with an opening / closing hole 181 different from the hole 81 facing the pressure adjusting portion 64, and faces the opening / closing hole 181. A valve opening / closing means 183 containing a moving opening / closing valve 182 is mounted on the upper surface side of the inner lid 62. Therefore, in this modification, in addition to the pressure adjusting unit 64 and the safety valve 85, the valve opening / closing means 183 is provided in the inner lid 62. The valve opening / closing means 183 includes an opening / closing valve 182 above the opening / closing hole 181 and an opening / closing valve spring 184 as an urging means for urging the opening / closing valve 182 in the direction in which the opening / closing hole 181 is opened. I have. Further, the flexible opening / closing packing 176 is disposed on the lid 21 side so as to face the upper portion of the opening / closing valve 182 and have a predetermined gap. The flexible opening / closing packing 176 is interlocked with the operation of the opening / closing shaft 186 provided on the outer lid cover 25.

  Between the opening / closing shaft 186 and the plunger 173 of the opening / closing solenoid 172, an arm-shaped opening / closing shaft operating portion 188 provided integrally with the front of the opening / closing frame 175 is disposed. The opening / closing shaft operating portion 188 is formed with a cam surface 188A facing the upper portion of the opening / closing shaft 186. The opening / closing shaft operating portion 188 opens and closes as the opening / closing shaft operating portion 188 interlocked with the plunger 173 appears. By changing the position of the cam surface 188A with which the upper portion of the shaft 186 contacts, the opening / closing shaft 186 and thus the on-off valve 182 move up and down. Specifically, in the non-energized state of the opening / closing solenoid 172 shown in FIG. 17, the opening / closing valve 182 is separated from the opening / closing hole 181 by the opening / closing valve spring 184 so that the opening / closing valve 182 and the opening / closing shaft 186 are pushed up. When the plunger 173 and the opening / closing shaft operating portion 188 are moved to the advanced position and the opening / closing solenoid 172 shown in FIG. 18 is energized, the opening / closing shaft operating portion is resisted against the bias of the opening / closing valve spring 184. The plunger 173 and the opening / closing shaft operating section 188 are configured such that the cam surface 188A of the opening / closing valve 188 pushes down the opening / closing shaft 186 and thus the opening / closing valve 182 so Moves to the retracted position. Therefore, in the energized state of the open / close solenoid 172, the open / close valve 182 closes the open / close hole 181 communicating with the steam port 146 so that pressure can be applied into the pan 11.

  As described above, in the vicinity of the pressure regulating solenoid 82, a pressure regulating operation unit 161 for moving the pressure regulating valve 69 is provided in front of the pressure regulating frame 152, while on the rear side of the pressure regulating frame 152. A protruding pressure adjusting frame lock piece 163 is provided. Similarly, an opening / closing shaft operating portion 188 having a cam surface 188A is provided in front of the opening / closing frame 175 around the opening / closing solenoid 172, and a protruding opening / closing frame lock piece is provided behind the opening / closing frame 175. 189 is provided. When the plunger 151 of the pressure adjusting solenoid 82 is in the retracted position, the pressure adjusting frame lock piece 163 is connected to the proximal end of the clamp 34 in order to restrict the movement of the clamp 34 in the direction of disengagement from the clamp receiver 38. The opening / closing frame lock piece 189 is arranged so as to sink under the base end portion 44A of the clamp 34 even when the plunger 173 of the opening / closing solenoid 172 is in the retracted position. Is done. Conversely, when the plunger 151 of the pressure adjusting solenoid 82 is in the advanced position, the pressure adjusting frame lock piece 163 is separated from the base end portion 34A of the clamp 34, and the plunger 173 of the opening / closing solenoid 172 is in the advanced position. In addition, the open / close frame lock piece 189 is separated from the base end portion 34A of the clamp 34. That is, when the pressure adjusting frame lock piece 163 and / or the open / close frame lock piece 189 are located below the base end portion 34A of the clamp 34, the operation of the clamp 34 is restricted, and the clamp 34 is clamped 38. However, when both the pressure adjusting frame lock piece 163 and the opening / closing frame lock piece 189 are separated from the lower side of the base end portion 34A of the clamp 34, the operation of the clamp 34 is not restricted, and the lid opening button 32 When the push operation is performed, the clamp 34 is detached from the clamp receiver 38, and the lid 21 is opened.

  FIG. 19 is a sectional view of the safety valve 85. The safety valve 85 is provided around the hole 201 formed in the inner lid 62, and a base member 202 attached from below the hole 201, a cap member 203 attached from above the hole 201, and the cap member 203 The opening / closing holding means 204 is provided, and an annular packing 206 that seals the inner surface of the hole 201 and the base member 202 in a watertight manner. Among them, the opening / closing holding member 204 includes an opening / closing means 207 as a valve body provided in the cap member 203 so as to be movable up and down, and an elastic member 208 interposed between the cap member 203 and the opening / closing means 207. . The base member 202 has an opening portion 211 communicating with the steam discharge unit 66 from the inside of the hole 201 of the inner lid 62 and thus the safety valve 85, and an opening / closing holding means so as to always close the opening portion 211. An elastic member 208 constituting 204 is configured to bias the opening / closing means 207 in one direction.

  Next, the control system will be described with reference to FIG. In this figure, 111 is a heating control means, which is the tact provided on the lid opening button 32 in addition to the temperature information from the pan temperature sensor 17 and the lid temperature sensor 65 and the operation signal from the operation switch 103. In response to a detection signal from the switch 42 or another tact switch 191 that detects the opening / closing of the lid 21, the heating coil 16 that heats the bottom of the pan 11 during cooking and warming, and the side of the pan 11 are heated. The cord heater 18 and the lid heater 36 for heating the lid body 21 are respectively controlled, and the above-described decompression pump 92 and electromagnetic valve 95 are respectively controlled.

  The heating control means 111 of this embodiment mainly controls the temperature of the bottom of the pan 11 by controlling the heating coil 16 based on the temperature detected by the pan temperature sensor 17, and mainly based on the temperature detected by the lid temperature sensor 65. The lid heater 26 is controlled so that the temperature of the heat radiating plate 24 and the inner lid 62 is controlled. The heating control means 111 includes, as a function on the control sequence of the program stored in its own storage means (not shown), a rice cooking control means 117 that heats the cooked food in the pan 11 during rice cooking, Insulation control means 118 for maintaining and heating the rice in the pan 11 to a predetermined temperature is provided.

  The heat retention control means 118 here includes a timer means 119. When the heat retention operation starts, the timer means 119 is activated to measure the elapsed heat retention time, and this heat retention elapsed time is set to a preset time (for example, 1 hour). When the temperature reaches, the pressure in the pan 11 returns from the pressurized state to almost the atmospheric pressure, and the temperature in the pan 11 is reduced to the heat retention temperature, so that the so-called heat retention is in a stable state. In addition, the heating control means 11 receives a reservation rice start instruction from the operation switch 103 and cooks rice to be cooked in the pan 11 at a predetermined time previously stored in the storage means. Reservation rice cooking control means 120 capable of executing a reserved rice cooking course for controlling the cooking is provided. The predetermined time can be changed as appropriate by operating, for example, the hour key or minute key of the operation switch 103.

  Reference numeral 122 denotes a heating coil driving unit that incorporates a high-frequency inverter circuit that receives a control signal from the heating control unit 111 and supplies a predetermined high-frequency current to the heating coil 16. Separately from this, the output side of the heating control means 111 receives a control signal from the heating control means 111 and drives the lid heater 36 so as to heat the radiator plate 24 and the inner lid 62. 123, a code heater driving means 124 for turning on the code heater 18, a solenoid driving means 125 for individually turning on or off the solenoids 82, 172, a pump driving means 126 for driving the decompression pump 92, and an electromagnetic valve 89 An electromagnetic valve driving means 127 for turning on or off and a display driving means 129 for driving the display means 128 including the LED 41 and the LCD 102 described above are provided. At the time of cooking by the rice cooking control means 117 and at the time of heat retention by the heat retention control means 118, the heating coil 16 heats the bottom of the pot 11 by the temperature detection from the pot temperature sensor 17 and the lid temperature sensor 65, and the code heater 18 The heating is performed on the side surface of the pan 11 and the lid body 36 is heated by the lid heater 36. In addition, after the rice cooking by the rice cooking control means 117 is finished and the cooked food in the pan 11 is cooked as rice, it automatically shifts to heat retention by the heat insulation control means 118, and the temperature detected by the pan temperature sensor 17 is reached. Based on this, by adjusting the heating of the pan 11 by the heating coil 16 and the cord heater 18, the rice is kept at a predetermined temperature (about 70 ° C. to 76 ° C.).

  In particular, supplementary explanation of the heating by the cord heater 18 is as follows.When the temperature of the rice drops from about 100 ° C. to about 73 ° C. after the rice cooking, the code heater 18 generates heat when the temperature is stable at about 73 ° C. Heat is radiated from the metal plate 29 to 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 14 of the pan 11 is heated. In addition, the cord heater 18 also heats the flange portion 14 of the pan 11 during the period of reheating the rice during the 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.

  Furthermore, the heating control means 111 in the present embodiment is a period until the rice cooking at the standby time of the reserved rice cooking by the reservation rice cooking control means 120 or the time until the rice cooking control means 117 starts substantial rice cooking. Depressurization control that operates the depressurization pump 92 and the depressurization state maintaining electromagnetic valve 95 so that the inside of the pan 11 becomes lower than the atmospheric pressure after the period or the heat retention control means 118 determines that the above-described heat retention is in a stable state. A function as means 130 is also provided.

  Next, the effect | action of the said structure is demonstrated based on the timing chart of FIG. 21 and FIG. In FIG. 21, each graph in the uppermost stage and the next stage shows changes in pressure and temperature in the pan 11, and hereinafter, the operation timing of the decompression selection switch, the operation timing of the decompression display lamp by the LCD, and The operation timing of the decompression pump 92 and the operation timing of the solenoid valve 95 are respectively shown (the painted state is on). In FIG. 22, each graph in the uppermost stage and the next stage shows changes in temperature and pressure in the pan 11, and hereinafter, the operation timing of the pressure regulating valve 69 (pressure regulating solenoid 82), and the on-off valve The operation timing of 182 (opening / closing solenoid 172) is shown (the painted state is on).

  In the cut-off state where rice cooking or heat insulation is not performed, both the pressure regulating solenoid 82 and the opening / closing solenoid 172 are in a non-energized (off) state. At this time, the plunger 151 of the pressure regulating solenoid 82 is in the advanced position, the pressure regulating valve 69 is moved so that the communication hole 74 is opened, and the plunger 173 of the opening / closing solenoid 172 is also in the advanced position, The opening / closing valve 182 moves upward so that the opening / closing hole 181 of the lid 62 is opened. Therefore, the inside of the pan 11 communicates with the outside through the communication hole 74 and the opening / closing hole 181 and is maintained at atmospheric pressure. Further, since both the pressure adjusting frame lock piece 163 and the open / close frame lock piece 189 are located away from the lower side of the base end portion 34A of the clamp 34, the operation of the clamp 34 is not restricted and the lid opening button 32 is pressed. When operated, the clamp 34 is detached from the clamp receiver 38. That is, in the cut state, the lid 21 can be freely opened and closed.

  Next, the operation at the time of reserved rice cooking will be described. By operating the hour key and minute key of the operation switch 103, the desired cooking time corresponding to the predetermined time is set, and the cooked food in the pan 11 is cooked. When a certain rice and water are put in and then another timer switch, for example, of the operation switch 103 is operated, a reserved rice cooking course by the reserved rice control means 120 is set (set), and a standby state for reserved rice is entered. In this reserved rice cooking course, the rice cooking control means 117 is controlled so that the cooked food in the pan 11 is cooked up at a predetermined time, but the reduced pressure is reduced from the standby state of the reserved rice cooking until the time when rice cooking starts substantially. The pressure reducing pump 92 and the electromagnetic valve 95 are controlled so that the control means 130 operates and the pressure in the pan 11 becomes lower than the atmospheric pressure (1 atm = 1013 hPa).

  Specifically, when the reserved rice cooking course is set, the decompression control means 130 turns on the decompression selection switch until immediately before the rice cooking starts, and displays on the display means 128 that the inside of the pan 11 is being decompressed. . Thereby, the user can know that the inside of the pan 11 is being decompressed. Further, the decompression control means 130 outputs a signal for driving the decompression pump 92 to the pump drive means 126 in order to discharge air from the inside of the pan 11, and the electromagnetic valve 95 and thus the path 94 in synchronization with the decompression pump 92. Is output to the solenoid valve driving means 127. Thereafter, the decompression control means 130 stops driving the decompression pump 92 and closes the electromagnetic valve 95 and consequently the path 94 to maintain the inside of the pan 11 in a decompressed state.

  While waiting for reserved rice cooking, the heating control means 111 turns the solenoid 82 on (energized), so the pressure regulating valve 69 is rolled to a position that closes the communication hole 74, but there is a slight amount in the pan 11. However, air enters (slow leak), and the pressure in the pan 11 gradually increases from the time when the solenoid valve 95 is closed. The depressurization control means 130 drives the depressurization pump 92 again after a certain period of time and opens the electromagnetic valve 95 and thus the path 94 to discharge air from the pot 11. Thereafter, the above-described operation is repeated, and the pressure reducing pump 92 and the electromagnetic valve 95 are simultaneously turned on and off, and the pressure in the pan 11 is maintained at a value within a desired range. In addition, since the operation | movement after substantial rice cooking started is common with the normal rice cooking operation mentioned later, it abbreviate | omits here.

  Thus, even when the standby time until the rice cooking is started is set long after the reserved rice cooking course is set, the inside of the pan 11 is kept in a decompressed state. Further, at the time of this pressure reduction, the pressure regulating valve 69 is placed on the first pressure regulating packing 75 and closes the hole 71A of the first pressure regulating packing 75, so that the inside of the pan 11 is secured. Therefore, it is possible to effectively prevent various germs from growing in the pan 11 and the rot of rice and water as cooked rice. Therefore, finally, delicious rice can be obtained when cooking. Further, in this embodiment, the pressure control means 130 performs control to reduce the pressure in the pan 11 over the whole period of waiting for reserved rice cooking. For example, after the reserved rice cooking course is set, When the time (for example, 2 hours) elapses, the pressure reduction control for the pan 11 may be performed. In this way, by reducing the pressure of the pan 11 below the atmospheric pressure for a certain period of time while waiting for reserved rice cooking, for example, the waiting time until the start of rice cooking is not so long, but decompression control into the pan 11 is Forcibly performed, it is possible to eliminate the concern of consuming unnecessary electric power to operate the decompression pump 92 and the electromagnetic valve 95.

  Next, the operation | movement is demonstrated about the normal rice cooking which does not perform reservation rice cooking. In addition, as above-mentioned, the operation | movement after the substantial rice cooking in a reservation rice cooking course is started is common with the operation | movement of the normal rice cooking demonstrated from now on.

  When rice and water, which are to be cooked, are put into the pan 11 and a rice cooking key of the operation switch 103 is operated, for example, rice cooking by the rice cooking control means 117 is started. Here, the rice cooking control means 117 is based on the temperature detection of the bottom of the pan 11 by the pan temperature sensor 17 in order to promote water absorption to the rice in the pan 11 before starting the substantial rice cooking. The bottom and side portions of the pan 11 are heated by the cord heater 18 and the water temperature in the pan 11 is maintained at about 45 to 60 ° C. for 15 to 20 minutes.

  At this time, the decompression pump 92 and the electromagnetic valve 95 are controlled so that the decompression control means 130 operates and the pressure in the pan 11 becomes lower than the atmospheric pressure. Specifically, when the start of the process is started, the decompression control means 130 turns on the decompression selection switch until just before the substantial rice cooking is started, and the LCD of the display means 128 indicates that the inside of the pan 11 is being decompressed. Display. Thereby, the user can know that the inside of the pan 11 is being decompressed. Further, the decompression control means 130 outputs a signal for driving the decompression pump 92 to the pump drive means 126 in order to discharge air from the inside of the pan 11, and the electromagnetic valve 95 and thus the path 94 in synchronization with the decompression pump 92. Is output to the solenoid valve driving means 127. Thereafter, the decompression control means 130 stops driving the decompression pump 92 and closes the solenoid valve 95 and thus the path 94 to maintain the inside of the pan 11 in a decompressed state, taking into account the pressure increase due to the slow leak, and a predetermined time. After a lapse of time, the decompression control means 130 drives the decompression pump 92 again for a predetermined time and opens the electromagnetic valve 95 and consequently the path 94 to discharge air from the pot 11. Thereafter, the above-described operation is repeated, and the pressure reducing pump 92 and the electromagnetic valve 95 are simultaneously turned on and off, and the pressure in the pan 11 is maintained at a value within a desired range.

  When the inside of the pan 11 is under atmospheric pressure, both the pressure adjusting solenoid 82 and the opening / closing solenoid 172 are energized (on), and the plunger 151 of the pressure adjusting solenoid 82 and the plunger 173 of the opening / closing solenoid 172 are turned on. Each moves to the retracted position. As a result, the pressure regulating valve 69 closes the hole 71A of the first pressure regulating packing 75 and the opening / closing valve 96 closes the opening / closing hole 181 of the inner lid 62, so that the inside of the pan 11 is secured. In addition, since both the pressure adjusting frame lock piece 163 and the opening / closing frame lock piece 189 sink under the base end portion 34A of the clamp 34, the rotation of the clamp 34 is restricted, and the lid opening button 32 is pushed. In addition, the engagement between the clamp 34 and the clamp receiver 38 is double-locked, so that the lid 21 does not open.

  In this manner, the inside of the pan 11 is maintained in a reduced pressure state at the time of time. Further, at the time of this pressure reduction, the pressure regulating valve 69 is placed on the first pressure regulating packing 75 and closes the hole 71A of the first pressure regulating packing 75, so that the inside of the pan 11 is secured. Therefore, the inside of the pan 11 can be depressurized in a sealed state at the time of passing, and the rice can sufficiently absorb water in the pan 11.

  Thereafter, when the predetermined time has expired, the rice cooking control means 117 starts a substantial rice cooking operation, the decompression control to the pan 11 by the decompression control means 130 is interrupted, the decompression selection switch is turned off, and the LCD The display indicating that the pressure is reduced is also stopped. At the same time, the decompression pump 92 and the electromagnetic valve 95 are turned off until the subsequent heat retention becomes stable. Further, the rice cooking control means 11 retracts the pressure regulating valve 69 from the communication hole 74. As a result, the pan 11 is maintained at substantially atmospheric pressure, but the open / close solenoid 172 is still in the on state, and the open / close frame lock piece 189 is positioned below the proximal end portion 34A of the clamp 34 to open the lid 21. I can't do that.

  When the boiling state in the pan 11 is detected, cooking (continuous boiling heating) and unevenness are carried out continuously, but until the middle of the unevenness, the rice cooking control means 117 is While the operation of the decompression means 91 is stopped, the pressure regulating solenoid 82 is turned on, and the communication port 70 is closed by the pressure regulating valve 69. Thereby, the communication between the inside of the pan 11 and the outside is blocked. Further, since both the pressure adjusting frame lock piece 163 and the opening / closing frame lock piece 189 sink under the base end portion 44A of the clamp 34, the engagement between the clamp 34 and the clamp receiver 38 is double-locked, and the lid body 21 cannot be opened.

  When shifting to the rice cooking process, the rice cooking control means 117 strongly heats the pan 11 by the heating coil 16 and performs boiling heating to the cooked rice. 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. During boiling heating, the rice cooking control means 117 turns off the solenoid 82 and retracts the pressure regulating valve 69 from the communication port 70. As a result, the pressure adjusting unit 64 is in an open state in which the inside and outside of the pan 11 are communicated without being sealed, and the pan 11 is maintained at substantially atmospheric pressure. On the other hand, the open / close solenoid 172 continues to be in the ON state, and the open / close frame lock piece 189 is positioned below the base end portion 44A of the clamp 34 so that the lid 21 cannot be opened. Note that the fact that the temperature of the lid 21 is stable at 90 ° C. or higher is detected by the temperature increase rate of the detected temperature from the lid temperature sensor 65. In this boiling detection, the pan temperature sensor 17 and the lid temperature sensor 65 can confirm that both the bottom of the pan 11 and the lid 21 have reached 90 ° C. or more, 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 which cannot be normally 120 ° C. or higher, the heating control means 111 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 17 or the lid temperature sensor 65 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 the boiling state in the pan 11 is detected, cooking (continuous boiling heating) and unevenness are carried out continuously, but until the middle of the unevenness, the rice cooking control means 117 is While the operation of the decompression means 91 is stopped, the pressure regulating solenoid 82 is turned on, and the communication hole 74 is closed by the pressure regulating valve 69. Thereby, the communication between the inside of the pan 11 and the outside is blocked. Further, since both the pressure adjusting frame lock piece 163 and the opening / closing frame lock piece 189 sink under the base end portion 44A of the clamp 34, the engagement between the clamp 34 and the clamp receiver 38 is double-locked, and the lid body 21 cannot be opened.

  Moreover, when it shifts to boiling continuation, the rice cooking control means 117 starts lid heating by the lid heater 36. The lid heating here is managed by the detected temperature of the lid temperature sensor 65 so that the temperature of the inner lid 62 becomes 100 to 110 ° C. In addition, when shifting to boiling continuous heating, the rice cooking control means 117 periodically turns the solenoid 82 on and off. In this continuous boiling heating, it is preferable to change the power interruption timing of the solenoid 82 in accordance with the menu selected by the operation switch 103. As a result, the degree of sealing of the pressure adjusting unit 64 leading to the pan 11 can be changed to an optimum one according to the selected menu.

  And when the bottom of the pan 11 has a predetermined temperature rise, the cooking in the pan 11 is detected, the rice cooking process by the rice cooking control means 117 is terminated, and the heat insulation control means 118 shifts to the heat insulation process. It shifts to nomura. During unevenness, the lid heater 36 is cut off by temperature control based on the temperature detected by the lid temperature sensor 65 to prevent dew condensation on the inner lid 62, and the temperature is high enough to prevent the rice from burning (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 118.

  In addition, when the operation shifts to unevenness, the operation of gradually returning the inside of the pan 11 to atmospheric pressure is performed in consideration of the fact that the lid 21 is opened immediately after the start of the subsequent heat retention. The heat retention control means 118 first switches the pressure regulating solenoid 82 from the on state to the off state during the unevenness, retracts the pressure regulating valve 69 from the communication hole 74, and then opens and closes after a predetermined time has elapsed. The solenoid 172 is switched from the on state to the off state. In this way, at least after the communication hole 74 is opened, the lid 21 cannot be opened until the opening / closing solenoid 172 is turned off, and before the inside of the pan 11 has returned to the atmospheric pressure, there is a problem. The lid 21 can be prevented from opening in preparation.

  Immediately after the transition to the heat insulation process, the inside of the pan 11 communicates with the outside through the communication hole 74 and the opening / closing hole 181 and is maintained at atmospheric pressure. At the same time, since both the pressure adjusting frame lock piece 163 and the open / close frame lock piece 189 are located away from the lower side of the base end portion 44A of the clamp 34, the lid 21 can be freely opened and closed.

  Thereafter, as described in the above embodiment, the heat retention control unit 118 is configured to reduce the pressure in the pan 11 so that the pressure in the pan 11 becomes lower than the atmospheric pressure by the pressure reduction control unit 130 when the heat retention elapsed time reaches a preset time. 92 and solenoid valve 95 again control the operation. At the same time, the pressure adjusting solenoid 82 and the opening / closing solenoid 172 are simultaneously turned on in order to seal the inside of the pan 11. As a result, both the pressure adjusting frame lock piece 163 and the open / close frame lock piece 189 enter under the base end portion 44A of the clamp 34, and the rotation of the clamp 34 is restricted. Such an operation may be performed when the pan temperature sensor 17 detects that the inside of the pan 11 has reached a predetermined temperature in the heat retaining stroke, not after a predetermined time of the heat retaining stroke.

  When the temperature is kept warm, the heating coil 16 heats the bottom and bottom of the side of the pan 11 and is slightly higher than the temperature of the rice contained in the pan 11, and the lid heater 36 heats the lower surface of the lid 21. Further, the temperature of the side surface of the pan 11 is controlled by the cord heater 18 so that the rice is not dried 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 17 and the lid temperature sensor 65 are abnormally high or abnormally low. Detects abnormalities and prevents this abnormal heating.

  When the process proceeds to the warming process, the warming control means 118 receives detection signals from the tact switches 42 and 191. That is, as shown in FIG. 4A, during the operation control of the pressure reducing means 91 for reducing the pressure inside the pot 11, the pressure adjusting solenoid 82 and the opening / closing solenoid 172 are turned on at the same time, and the user closes the lid. When an attempt is made to push the lid opening button 32 with the intention of opening the body 21, the proximal end 34A of the clamp 34 hits the pressure adjusting frame lock piece 163 and the opening / closing frame lock piece 189, and its rotation is restricted. However, as shown in FIG. 4B, when the lid opening button 32 is pushed downward against the upward biasing force of the biasing means and a load greater than the operating force is applied to the tact switch 42, the tact switch 42 operates. Then, the detection signal is transmitted to the heat retention control means 118. When the heat retention control means 118 receives the detection signal from the tact switch 42 at this time, the pressure regulating solenoid 82 and the opening / closing solenoid 172 are turned off in conjunction with each other, and both plungers 151 and 173 are advanced to communicate with each other. While opening the hole 74 and the opening / closing hole 181, as shown in FIG. 4C, the rotation restriction of the pressure adjusting frame locking piece 163 and the opening / closing frame locking piece 189 with respect to the clamp 34 is also released, and the lid opening button 32 is pressed again. Thus, the engagement between the clamp 34 and the clamp receiver 38 is released, and the lid 21 can be opened.

  When the lid 21 is opened (that is, when the pushing operation of the lid opening button 32 is finished), the lid opening button 32 is raised again by the urging force from the clamp urging means 36 and stops at a predetermined position. At this time, the tact switch 42 in the lid opening button 32 is not electrically turned on / off, but is turned on (ON) indicating a state in which a load is applied to the detecting means 45, that is, a state in which the tact switch 42 is pressed. ) State, and a signal corresponding to the state is output to the heating control means 111.

  When the heating control unit 111 receives a detection signal from the tact switch 42 at this time, and after a predetermined time has elapsed, the heating control unit 111 detects again that the tact switch 42 is in an ON state. The decompression control means 130 constituting the heating control means 111 drives the decompression means 91 to decompress the inside of the pan 11. At this time, even if the lid 21 is open, the pressure adjusting frame lock piece 163 regulates the pushing operation of the lid opening button 32, but the rotation operation of the clamp 34 is not regulated. Can be closed.

  The heating control means 111 reads the signal from the tact switch 42 only during the heat retention that is a predetermined stroke. In this case, the heating control means 111 receives a signal from the tact switch 42, but does not perform control using the received signal. By doing so, the software configuration as the heating control means 111 can be simplified. Further, the heating control means 111 may read a signal from the tact switch 42 in a process other than the heat retention.

  In addition, during the unevenness and warming process, when the pressure reducing means 91 is operated and the inside of the pan 11 is under atmospheric pressure, the heating control means 111 sends a control signal for continuously lighting the LED 41 to the display driving means 129. Thereby, the user can recognize immediately that the lid 21 and the main body 1 are engaged and locked because the inside of the pan 11 is being decompressed. In addition, since there is a slight time lag from when the lid opening button 32 is intended to be pushed to when the lid 21 can actually be opened, the clamp 34 of the lid 21 and the clamp receiver 38 of the main body 1 When the tact switch 42 outputs a detection signal when it is intended to release the engagement of the LED 41, the LED 41 switches to a blinking operation, and after a predetermined period of time has elapsed, if the LED 41 is automatically turned off, the lid is immediately turned off. The user can understand whether the body 21 does not open.

  In addition, the clamp switch holder 46 biased by the biasing means 53 moves freely inside the lid opening button 32, so that the clamp switch holder 46 and the clamp 34 are always elastically contacted via the biasing means 53. Therefore, when the lid opening button 32 is pressed and the tact switch 42 is pressed against the clamp 34, followability is generated, and the detection accuracy by the tact switch 42 can be improved and the tact switch 42 is required to operate. Even if the lid opening button 32 is pushed too much with a force greater than the operating force, the biasing means 53 absorbs the force pushing the lid opening button 32, so that it is possible to prevent the tact switch 42 from being loaded with more than its durability. The switch 42 can be protected. Therefore, the urging force of the urging means 53 is set to be stronger than the operating force of the tact switch 42 and weaker than the durability of the tact switch 42.

  In this way, an inexpensive and ultra-small tact switch 42 can be used, and it is not necessary to secure a special space for configuring the lid opening / closing detection means. In addition, by using the tact switch 42, the number of wirings can be reduced as compared to using other switches.

  The biasing means 53 of the clamp switch holder 46 is set to be stronger than the operating force required to operate the tact switch 42 and weaker than the durability of the tact switch 42, so that stable accuracy and durability can be obtained. .

  In addition, the upper storage body 47 and the lower storage body 48 of the clamp switch holder 46 are integrally formed by the self-hinge portion 50, so that the number of equipment can be reduced and the assemblability due to the small parts can be taken into consideration. it can.

  Further, by attaching an embossed PET sheet 54 or the like to the clamp switch holder 46, a waterproof structure can be made cheaper than using a waterproof type switch.

  Further, by setting the thickness of the PET sheet 54 used for waterproofing to 90 to 125 μm, it is possible to reduce the loss of detection accuracy of the tact switch 42 and have durability to withstand long-term use.

  The lid opening / closing detection means 45 detects that the tact switch 42 is turned on and the lid 21 is open by the clamp 34 biased by the biasing means 53 when the lid 21 is opened. Thereby, when the lid 21 is open, the energization to the lid heater 26 and the decompression means 91 is stopped, and unnecessary power consumption can be suppressed. Further, if the pressure reducing means 91 operates when the lid 21 is opened, it is possible to prevent the clamp 34 from being locked and the lid 21 from being closed.

  Since the urging force upward from the urging means 53 is always applied to the bottom surface of the lower housing body 48, the lower housing body 48 rotates downward about the self-hinge portion 50 to open the upper housing body 47. The part 49 can be prevented from being opened, and the substrate 43 accommodated in the tact switch holder 46 can be prevented from being detached.

  Further, by providing the lower storage body 48 with the front guide member 48A and the rear guide member 48B, the positioning of the lower storage body 48 with respect to the upper storage body 47 is facilitated, and the lower storage body 48 is rotated. Even if the substrate 43 attempts to slide down from the upper surface of the lower housing 48, the front and back of the substrate 43 are held by the front guide member 48A and the rear guide member 48B, and the substrate 43 can be prevented from falling off.

As described above, the present embodiment includes the pan 11, the main body 1 that houses the pan 11, the lid body 21 that covers the main body 1, the decompression means 91 that lowers the inside of the pan 11 below atmospheric pressure, A clamp 34 and a clamp receiver 38 as engaging means for holding the lid 21 in a predetermined state, that is, a closed state, and a hinge spring 29 as a lid biasing means for biasing the lid 21 in an opening direction as a predetermined direction. And a lid opening button 32 as a releasing means for releasing the closed state of the main body 1 and the lid body 21; a blocking means 121 for inhibiting the holding release of the clamp 34 and the clamp receiver 38; Detecting means 45 that detects a change in the button 32 and releases the inhibition by the inhibiting means 121 is provided.The detecting means 45 is provided so as to be movable inside the lid opening button 32, and the detecting means 45 is attached in a predetermined direction. It is a rice cooker provided with urging means 53 as release urging means The biasing means 53 is set stronger than the operating force of the tact switch 42 and weaker than the durability of the tact switch 42, so that the detecting means 45 can be made compact and the detection accuracy can be improved.

The present embodiment, the clamp switch holder 46 is a case for accommodating the tact switch 42, by providing a self-hinge portion 50, it is possible to reduce the number of parts.

Furthermore, in the present embodiment , the water resistance of the detection means 45 can be improved by providing the tact switch 42 with a waterproof structure.

The present embodiment, the thickness of the PET sheet 54 is a sheet member used in the waterproof structure, by which the 100～125Myuemu, it is possible to ensure the improved and durability of the detection accuracy of the detecting means 45.

  Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description of the common parts is omitted as much as possible.

  In this embodiment, as shown in FIG. 23, a photocoupler switch 300 using a photocoupler sensor, which is a photoelectric sensor, is installed in the lid 21 as a lid opening / closing detection means for detecting the opening / closing of the lid 21. ing.

  As an example of the photocoupler switch 300, as shown in FIGS. 24 to 26, when the float 302 is provided in the hollow box-shaped switch body 301 of the photocoupler switch 300 and the lid 21 is opened, the hinge portion 28 is provided. It is detected that the float 302 has moved to the side and the lid 21 has been opened.

  Here, the photocoupler switch 300 includes a spherical float 302 that can be freely rolled in the switch body 301 described above, a light projecting unit (not shown) including a light emitting element such as a light emitting diode, and a light receiving unit such as a phototransistor. A float detecting unit 303 having a light receiving unit (not shown) provided with an element and capable of optically detecting the operation of the float 302 through a through hole 301A provided in the switch body. Further, the float detecting unit 303 includes a distance measuring method, a retroreflective method, a diffuse reflection method, and a projector as shown in FIG. It is possible to adopt a facing method (transmission method) in which the optical unit 303A and the light receiving unit 303B are provided separately. In addition, the through hole 301A and the float detection unit 303 are provided on the front side of the rice cooker with respect to the switch body 301 in FIGS. 24 to 26, but are provided on the hinge part 28 side with respect to the switch body 301. Things can be used. Further, the switch body 301 itself may be formed of a light-transmitting material without providing the switch body 301 with the through hole 301A. In FIG. 26, the positions of the light projecting unit 303A and the light receiving unit 303B may be reversed.

  In addition, the float 302 is capable of shielding or reflecting light from the float detection unit 303, and the shape thereof is not limited to a spherical shape. For example, if it has a good rolling shape, a cylindrical shape or other shapes It does not matter. The float 302 is placed on a groove 304 that is an inclined portion formed in a downwardly inclined shape from the rear to the front of the rice cooker in the photocoupler switch 300. When the lid 21 is closed, the float 302 is floated. Moves forward in the switch body 301 so that the 302 approaches the float detection unit 303 side, and conversely moves in the switch body 301 so that the float 302 moves away from the float detection unit 303 when the lid 21 is open. It is the composition to do.

  As described above, since the light receiving state of the float detection unit 303 is changed by the movement of the float 302 when the lid 21 is opened and closed, the float detection unit 303 is configured to detect the opening and closing of the lid 21.

  Further, as shown in FIG. 27, in addition to the configuration shown in FIG. 20, a lid opening / closing detection means 300 is provided on the input side of the heating control means 111, and the heat retention control means 118 is based on a detection signal from the lid opening / closing detection means 300. 16 and the code heater 18 are controlled.

  In the present embodiment, as shown in FIG. 28, the lid opening / closing detection means 300 detects the opening of the lid body 21 in the heat retaining step of normally retaining the rice at the first heat retaining temperature T1 (step S101) ( In step S102), a detection signal is transmitted to the heat retention control means 118, and the heat retention control means 118 changes the output of the heating coil 16 and the code heater 18 to be higher than the first heat retention temperature T1 from the first heat retention temperature T1. The temperature is switched to the second heat retention temperature T2 (T1 <T2) to increase the heat retention temperature in the heat retention process (step S103).

  When the lid opening / closing detection means 300 detects that the lid body 21 is closed (step S104), a detection signal is transmitted to the heat retention control means 118, and the heat retention control means 118 outputs the output of the heating coil 16 and the code heater 18. It changes and switches from the 2nd heat retention temperature T2 to the 1st heat retention temperature T1, and returns the heat retention temperature in a heat retention process to a normal heat retention temperature (step S101).

  Thus, when the lid 21 is opened and closed in order to use the rice in the pan 11 during the heat insulation process, the pan 11 in the rice cooker and the rice in the rice cooker are cooled by the outside air, but the heat insulation control means When 118 detects that the lid 21 has been opened by the lid opening / closing detection means 300, the heat retention temperature is changed from the first heat retention temperature T1, which is the normal heat retention temperature, to the high second heat retention temperature T2. The heating coil 16 and the cord heater 18 are controlled. Therefore, even if the lid 21 is opened during the heat insulation, the temperature inside the pan 11 is prevented from being cooled by the outside air by raising the heat insulation temperature while the lid 21 is opened, and the deterioration due to the temperature drop of the rice during the heat insulation is prevented. Can be prevented.

In the present embodiment as described above, the pot 11, a heating coil 16 or code heater 18 is a heating means for heating the pot 11, a main body 1 incorporating a pot 11 and the heating coil 16 and code heater 18, pan 11 which covers the upper part of 11 and is attached so as to be openable and closable around the hinge portion 28 of the main body 1, and detects the opening and closing of the lid 21, and the insulation temperature during the insulation is changed from the first insulation temperature T 1 to the first A rice cooker having a function of switching to a second heat retention temperature T2 higher than the heat retention temperature T1, having a lid opening / closing detection means 300 for detecting the opening / closing of the lid body 21 in the lid body 21; By using the photocoupler switch, the opening / closing of the lid 21 can be detected reliably.

In the present embodiment, since the float 302 is provided inside the photocoupler switch 300, the opening / closing of the lid 21 can be reliably detected by the movement of the float 302.

  Further, as an effect of the embodiment, by adopting a photocoupler switch which is a photoelectric sensor for the lid opening / closing detection means 300, it is not necessary to use an expensive magnet for the float 302, so that the cost can be suppressed and the float 302 can be suppressed. By using a lightweight material such as a resin material for the lid, the lid opening / closing detection means 300 is reduced in weight, thereby reducing the weight of the entire lid 21 and improving the operability of opening / closing the lid 21 and carrying the rice cooker. Is also possible.

  Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description of the common parts is omitted as much as possible.

  In addition, as shown in FIG. 29, in the electrical configuration of the rice cooker of the present embodiment, in addition to the configuration shown in FIG. 27, the input side of the heating control means 111 detects the weight of the pan 11 including the rice to be cooked. Weight detection means 400, and a cut key 401 provided on the operation panel 101, which is a cut operation means for stopping all operations and turning off, and on the output side of one heating control means 111, a notification means It is assumed that the storage unit 403 provided with the buzzer 402 and the heating control unit 111 stores the empty weight of the pan 11 in advance.

  In the present embodiment, as shown in FIG. 30, the storage means 403 of the heating control means 111 stores in advance the weight of the empty pan that is the empty state of the pan 11, and the pan containing water and rice or other foods. When 11 is set in the rice cooker and the lid 21 is closed, the weight of the pan 11 set by the weight detection means 400 is heavier than the empty pan (step S201) and the lid 21 is opened by the lid open / close detection means 300. When it is detected that the switch has been closed (step S202) and various switches such as the operation switch 103 that have not been operated for a certain period of time have not been operated (step S203), a buzzer sound is emitted from the buzzer 402 (step S203). Step S204).

  Here, in the state of step S204, by pressing the OFF key 401 (step S205), the buzzer sound of the buzzer 402 is stopped, and the warning that the operation switch 103 or the like is caused by the buzzer sound can be released (step S205). Step S206). Moreover, rice cooking or cooking is started by operating the operation switch 103 etc. by step S203 (S207).

In this embodiment , the rice cooker body 1, the pot 11 that is contained in the rice cooker body 1 and contains water and rice or other food as cooking, the heating coil 16 as a heating means for heating the pot 11, and the cord The heater 18, the pan temperature sensor 17 as a pan temperature detecting means for detecting the temperature of the pan 11, the heating control means 111 as a control means for controlling the heating coil 16 and the cord heater 18, and the weight of the pan 11 are detected. Weight detecting means 400 and lid open / close detecting means 300 as lid detecting means for detecting opening / closing of the lid 11, the weight of the empty pan 11 is stored in advance, and the pan having a weight equal to or higher than the empty state is stored. After 11 is set and the lid 21 is closed, when the operation switch 103 as the operation means is not operated, the buzzer 402 as the notification means notifies the user, and the buzzer 402 makes a warning sound. Forget cooking start or cooking start after setting Can be prevented.

In this embodiment also, the pot 11 by weight of the above empty state is set, after closing the lid 21, by operating the switching key 401 as switching operation means, and shall stop the buzzer 402 Thus, after setting the pan 11, cooking or cooking can be performed at a time convenient for the user.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention.

1 body
11 Pot
16 Heating coil (heating means)
17 Pan temperature sensor
18 Code heater (heating means)
21 Lid
29 Hinge spring (lid biasing means)
32 Lid opening button (release means)
34 Clamp (holding means)
38 Clamp holder (holding means)
42 Tact switch (detection means)
45 Detection means (inhibition release means)
50 Self hinge
53 Biasing means (release biasing means)
54 PET sheet (sheet member)
91 Pressure reducing means
121 Blocking measures

Claims (4)

A pan, a main body for storing the pan, a lid for covering the main body, a decompression means for bringing the inside of the pan below atmospheric pressure, a holding means for maintaining a predetermined state, and the lid in a predetermined direction. A lid urging means for urging, a releasing means for releasing the predetermined state, an inhibiting means for inhibiting the holding release of the holding means, and an inhibition releasing means for releasing the inhibiting means, wherein the inhibition releasing means is A rice cooker provided with release urging means for urging the inhibition release means in a predetermined direction so as to be movable inside the release means,
The rice cooker characterized in that the release biasing means is set stronger than the operating force of the inhibition release means and weaker than the durability of the inhibition release means. 2. The rice cooker according to claim 1, wherein a self-hinge is provided in a case storing the inhibition release means. The rice cooker according to claim 1 or 2, wherein the inhibition releasing means has a waterproof structure. The thickness of the sheet | seat member used for the said waterproof structure was 100-125 micrometers, The rice cooker of Claim 3 characterized by the above-mentioned.