JP5330311B2 - rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker which reduces troublesomeness in making preparation each time when starting rice cooking, and is user-friendly by certainly collecting steam. <P>SOLUTION: Steam generated from inside the pan is cooled by a steam path cooling unit 97 when the steam passes a steam path 95 from a steam port 91, and furthermore, when it reaches a steam recovery unit 96, it is cooled by another steam recovery/cooling unit 98. Therefore, even if preparation is not made each time when starting rice cooking, condensation recovery of the steam is certainly carried out, steam discharging out of a container is controlled, and user-friendliness improves. Since the steam path 95 and the steam recovery unit 96 can be independently removed, respectively, and moreover, a steam storage part 99 of the steam recovery unit 96 and the steam recovery/cooling unit 98 can be independently removed, respectively, cleaning property can be raised, though they are the routes which the steam passes. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a rice cooker provided with an accommodating portion for accommodating steam.

  As this type of rice cooker, for example, Patent Documents 1 to 3 disclose a rice cooker provided with a steam recovery means. In particular, Patent Document 2 and Patent Document 3 disclose storing water in the recovery means in order to cool the steam.

JP 2002-142970 A JP 2008-206829 A JP 2009-165628 A

  In the above configuration, in the conventional configuration, it is necessary to prepare water for cooling, which is inconvenient.

  Therefore, an object of the present invention is to provide an easy-to-use rice cooker that reduces the troublesomeness of preparing water for cooling and reliably collects steam.

  In the first aspect of the invention, the steam is cooled by the first cooling means when passing through the passage means from the discharge portion, and further cooled by another second cooling means when reaching the recovery means. Even without preparing water, it is possible to reliably recover steam and suppress steam discharge, improving usability. Further, since the passage means and the recovery means can be removed, and the storage section of the recovery means and the second cooling means can also be removed, the cleanability can be improved while being a path through which the steam passes.

Furthermore , by using an elastic member as the holding means, it is possible to reduce steam leakage through the adjusting means when the pressure regulating valve is in a closed state .

Furthermore , when the opening / closing valve is opened, the steam is collected in the storage unit, so that the taste of the rice can be improved while reducing the steam discharge, and a rice cooker with improved usability can be provided. Furthermore, since the storage unit can be removed from the lid and the storage unit itself can be disassembled into a plurality of members, the inside of the storage unit can be easily cleaned, and the cleanability is improved.

In the invention of claim 2 , since the on-off valve opens the second communication hole and discharges the steam to the storage unit before the pressure regulating valve, the amount of steam discharged from the first communication hole through the exhaust portion is minimized. can do.

In the invention of claim 3 , it is possible to reduce the capacity of the storage unit and thus the rice cooker by reducing the inside of the storage unit to atmospheric pressure or less by the suction means.

In invention of Claim 4 , when a vapor | steam flows into a storage unit, since the inside of a storage unit exists in the state below atmospheric pressure, the capacity | capacitance of a storage unit and by extension, a rice cooker can be made smaller.

  According to the first aspect of the present invention, it is possible to provide an easy-to-use rice cooker that reduces the annoyance of preparing each time when rice cooking is started and reliably collects steam. In addition, the cleaning property can be improved while being a path through which steam passes.

Furthermore , when the pressure regulating valve is in the closed state, steam leakage through the adjusting means can be reduced .

Furthermore , usability can be improved and a rice cooker with improved cleanability can be provided.

According to the second aspect of the present invention, the amount of steam discharged through the steam port can be minimized.

According to the invention of claim 3 , it is possible to reduce the capacity of the storage unit and thus the rice cooker.

In invention of Claim 4 , the capacity | capacitance of a storage unit and by extension, a rice cooker can be made smaller.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole sectional drawing of the rice cooker which shows one Example of this invention. It is a whole side view of the rice cooker shown in FIG. 1 same as the above. FIG. 2 is an enlarged cross-sectional view of the main part of FIG. It is an important section expanded sectional view at the time of a steam mouth cap wearing same as the above. FIG. 3 is an enlarged cross-sectional view of the main part in a state where the steam port cap is removed and the steam recovery means is connected via the steam passage means. It is a perspective view which shows a solenoid for pressure regulation and its surrounding structure same as the above. FIG. 6 is a cross-sectional view of the main part showing the periphery of the clamp in a state where the normal lid is closed. FIG. 6 is a cross-sectional view of the main part showing the periphery of the clamp in a state where foreign matter is interposed between the lid and the main body. It is a principal part sectional view which shows the relationship between the front-end | tip position in the engaging part of a clamp, and the front-end | tip position of a clamp receiver same as the above. It is the principal part sectional drawing which expanded the latching | locking part of a clamp and a clamp receiver same as the above. It is a perspective view which shows the internal structure of a cover body same as the above. It is a perspective view of the state which attached the frame board to the outer frame same as the above. It is a principal part perspective view of the state which attached the frame board to the outer frame same as the above. It is a principal part perspective view which shows the attachment state of a clamp reinforcement board same as the above. It is sectional drawing which shows the attachment state of a clamp reinforcement board same as the above. It is a principal part perspective view which shows the reinforcement structure of a hinge part same as the above. It is a block diagram which shows an electrical structure same as the above. It is the figure which looked at the inner lid from the bottom face side same as the above. It is principal part sectional drawing which shows the state which mounted | wore the cover body with the storage unit same as the above. It is an explanatory view showing circulation of steam same as the above. It is a graph which shows the relationship between the detection temperature of a pan temperature sensor, the heating control with respect to a pan, and the internal pressure of a pan.

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

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

  In the pot housing 9, a bottomed cylindrical pot 11 for storing a rice to be cooked such as rice or water is detachably accommodated. The pan 11 has a pan body 12 mainly made of aluminum having good thermal conductivity, and a heating element 13 made 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; Consists of. The reason why the heating element 13 is not provided from the center to the top of the side surface of the pan 11 is to reduce the weight of the pan 11. An annular flange portion 14 is formed around the upper end of the pan 11 so as to extend to the outer periphery thereof. In addition, it has the structure which does not provide a heating means in the outer periphery of the pan accommodating part 6. FIG.

  A heating coil 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 generates heat due to the alternating magnetic field generated from the heating coil 16, and the pot 11 and thus the cooked food in the pot 11 are heated when cooking and keeping warm. ing.

  In addition, a thermistor-type pan temperature sensor 17 is disposed as a temperature detecting means at the center of the bottom of the inner frame 8 so as to elastically contact the outer surface of the bottom of the pan 11. Accordingly, the heating amount of the heating coil 16 is adjusted to keep the pan 11 at a constant temperature.

  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 suppression member mounted and mounted on the upper end of the pan container 9 and covers the cord heater 18 from above. A flange heater is configured by including a metal plate 20 that is attached to the heater ring 19 and also serves as a heat-dissipating part and a fixing bracket made of, for example, an aluminum plate that is excellent in thermal conductivity. The metal plate 20 is positioned to face a gap between the rice cooker body 1 and a lid 31 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, so that the pan 11 is housed in the pan housing 9 while being hung on the upper frame 2 of the main body 1. ing. Therefore, there is almost no gap between the pan 11 and the upper end of the pan housing 9 in which the pan 11 is housed. Moreover, the flange portion 14 of the pan 11 has an outer shape that is equal to or greater than the size of the cord heater 18, so that the cord heater 18 is covered with the flange portion 14 of the pan 11 from above. . However, although not shown in the drawing, the handle portion (flange portion 14) of the pan 11 is made non-contact, and by partially forming a gap, when cooking rice with water attached to the outer surface of the pan 11, Steam is discharged from the gap.

  The lid 31 is composed of an outer lid 32 as an external part that forms an outer shell of the upper surface, and an outer lid cover 33 that forms a lower surface that is the inner surface of the lid 31. A metal heat sink 34 anodized with aluminum is provided, and a cover heater 35 as a cover heating means is provided on the upper surface of the heat sink 34. The lid heater 35 may be an electric heater such as a cord heater, or an electromagnetic induction heating type heating coil.

  A hinge portion 38 connected to the lid 31 is provided behind the upper frame 2. The hinge portion 38 is provided with a pair of holes (not shown) in the left-right direction when viewed from the front, and a hinge spring 40 formed of 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 33 so as to face the hole provided in the hinge portion 38. By inserting a rod-shaped hinge shaft 41 in common with the hinge hole and the hole of the hinge portion 38, the main body 1 and the lid 31 are pivotally supported with the hinge shaft 41 as a fulcrum. Further, one end and the other end of the hinge spring 40 are hooked on the outer cover cover 33 and the outer frame 2, respectively, so that the cover body 31 is always urged in the opening direction.

  On the front upper surface of the lid 31, a lid opening button 46 is disposed in an exposed state. When the lid opening button 46 is pressed, the engagement between the lid 31 and the main body 1 is released and the lid is opened by the hinge spring 40. The body 31 opens automatically.

  Around the lid opening button 46, the lid 31 is provided with a clamp 44 corresponding to the locking means. The clamp 44 is pivotally supported with respect to the outer lid cover 33 around a clamp shaft 45 as a shaft provided inside the lid 31. The lid opening button 46 corresponding to the lid opening / closing means is disposed in an exposed state from the front upper surface of the lid 31 so that the user can operate it. Inside the lid 31, clamp urging means (not shown) such as a spring for urging the base end of the clamp 44 toward the lid opening button 46 is provided, so that the lid opening button 46 is always upward. Pushing force is applied.

  As shown in FIGS. 7 to 9, the clamp 44 has a substantially L-shape extending inward of the main body 1 at the distal end on the opposite side to the base end 44 </ b> A that contacts the lid opening button 46. A shaped engaging portion 44C is formed. The clamp 44 is formed of a metal part such as stainless steel, and thereby, it is possible to obtain engagement with the clamp receiver 50 having a higher strength than when the clamp 44 is made of synthetic resin. Further, the engaging portion 44 </ b> C of the clamp 44 is provided at a substantially equal position on the left and right from the center of the lid 31, and swings in a substantially front-rear direction of the main body 1.

  On the other hand, a clamp receiver 50 corresponding to a receiving means is disposed in front of the upper frame 2 at a position substantially opposite to the hinge portion 38 provided on the upper frame 2, and the lid 31 is closed to the main body 1 side. In this case, the clamp 44 rotates about the clamp shaft 45 as a central axis by the biasing force of the clamp biasing means and engages with the clamp receiver 50, thereby holding the lid 31 in the closed state with respect to the main body 1. It is like that. The clamp receiver 50 is formed of a metal part such as stainless steel. By doing so, compared with the case where the clamp receiver 50 is made of a synthetic resin, the engagement with the clamp 44 having a higher strength can be obtained. On the contrary, when the lid 31 is opened, the lid opening button 46 is pushed, the base end portion 44A of the clamp 44 is pushed downward, and the clamp 44 is rotated in the reverse direction. Can be disengaged. The lower part of the clamp receiver of the upper frame 2 needs to have a depth that does not collide when the clamp 44 rotates about the clamp shaft 45. The clearance between the clamp 44 and the clamp receiver 50 is set to have a dimensional relationship that is larger than the normal engagement amount of the clamp 44 and the clamp receiver 50. Further, the dimensional relationship is set to be larger than the gap between the outer lid cover 33 and the upper frame 2.

  Reference numeral 55 denotes an inner lid assembly provided on the outer side, that is, the lower side of the heat radiating plate. This inner lid assembly 55 is provided on the entire outer periphery of the inner lid 56 in order to close the gap between the metallic inner lid 56 made of anodized stainless steel or aluminum and the pan 11 and the inner lid 56. A lid packing 57 made of an elastic member such as fluorine rubber is provided. The inner lid 56 and the lid packing 57 are integrated by a packing base 59, whereby the inner lid assembly 55 is detachably provided on the inner surface of the outer lid cover 33. Further, the lid packing 57 formed in an annular shape contacts the upper surface of the flange portion 14 of the pan 11 when the lid 31 is closed (when the lid is closed), and the gap between the pan 11 and the inner lid 56 The steam generated from the pan 11 is sealed.

  In addition, the heat radiating plate 34 is a thermistor-type lid temperature sensor for controlling the temperature of the inner lid 56 by the lid heater 35 as lid temperature detecting means for detecting the temperature of the inner lid 56 attached to the lid 31. 60 is provided. In addition, a steam port unit 61 that is detachable from the upper surface side of the lid body 31 is provided near the upper surface rear side of the lid body 31.

  Here, with reference to FIG. 3, the configuration of the main part of the inner lid assembly 55 will be described. The inner lid 56 includes a plurality of holes communicating with the inside of the pan 11, that is, communication holes 62 and 63. . In addition, pressure adjusting portions 58 and 64 as pressure adjusting means are provided separately corresponding to the communication holes 62 and 63, respectively. When the inner lid 56 is attached to the lower side of the outer lid cover 33, the pressure adjusting sections 58 and 64 are provided so as to face the inlet side of the steam port unit 61. Communicate internally. And these pressure regulation parts 58 and 64 open or close the communicating holes 62 and 63, and adjust the pressure in the pan 11. FIG.

  The configuration of the pressure adjusting unit 58 that opens and closes the communication hole 62 will be described in more detail. The pressure regulating unit 58 as the first pressure regulating means includes a pressure regulating valve 65 for regulating pressure, a pressure regulating valve holder assembly 66 that holds the pressure regulating valve 65, and a dome-shaped pressure regulating valve cover 67 that covers the pressure regulating valve 65. Configured. The pressure regulating valve 65 is a material excellent in corrosion resistance and may be any component having a certain weight, and is formed of, for example, an austenitic stainless sphere.

  The pressure regulating valve holder assembly 66 includes a first holder 68, a second holder 69, a first pressure regulating packing 71 corresponding to a pressure reducing support member, and a second pressure regulating packing 72. The first pressure regulating packing 71 is provided with a pressure regulating hole 70 that abuts below the ball-shaped pressure regulating valve 65 when the inside of the pan 11 is pressurized. The pressure adjusting hole 70 is for communicating the pot 11 and the outside of the lid 31. When the steam in the pot 11 passes through the pressure adjusting hole 70, it is discharged from the steam port unit 61 to the outside air. ing. Further, the first holder 68 and the second holder 69 are provided with a convex engaging portion (not shown) and a concave engaged portion 76 for fitting each other. The first holder 68 and the second holder 69 are attached to a communication hole 62 provided in the inner lid 56 as a holding member for holding the first pressure regulating packing 71. The first holder 68 is entirely formed in a cap shape, and has a through hole 68A at the center thereof. The first holder 68 has a peripheral portion 68B of the through hole 68A and an upper end portion 69A of the second holder 69. The base is clamped. The second holder 69 has a cylindrical shape. A flange 69B is formed on the lower side of the second holder 69 so as to contact the lower surface around the communication hole 58 of the inner lid 56, and the ring-shaped first holder is formed on the upper outer periphery of the flange 69B. A concave groove 69 </ b> C for fitting the two pressure regulating packings 72 is formed.

  The pressure regulating valve holder assembly 66 is assembled by first inserting the second pressure regulating packing 72 into the concave groove 69C of the second holder 69 into the communication hole 62 provided in the inner lid 56, and The first pressure regulating packing 71 is placed on the valve support 73 so as to cover the upper end 69A. From this state, the first pressure adjusting packing 71 is sandwiched so that the first holder 68 is covered from above, the engaging portion and the engaged portion 76 are fitted to each other, and the second holder 69 is attached to the first holder. Install 68. In a state where the pressure regulating valve holder assembly 66 is assembled, the inner surface of the second holder 69 directly faces the inside of the pan 11, and the first pressure regulating packing 71 disposed on the upper side of the second holder 69 is moved from the inside of the pan 11. The structure does not require direct pressure.

  The pressure regulating valve 65 is held by the pressure regulating valve holder assembly 66 assembled in this manner, and the pressure regulating portion 58 is configured by covering the pressure regulating valve cover 67 from above. At this time, the pressure regulating valve holder assembly 66 and the pressure regulating valve cover 67 are attached by claw fitting, and the claw 67a formed in the pressure regulating valve cover 67 is inserted into a hole or groove (not shown) formed in the first holder 68. By making it penetrate and engage with the engaged portion 76 of the second holder 69, the engagement structure is made stronger as the pressure adjusting portion 58. Accordingly, here, when the pressure regulating valve cover 67 is attached, the fitting by the claw 67a is performed with respect to the engaged portion 76 of the second holder 69 through the first holder 68 and faces the inside of the pan 11. The second holder 69 is firmly fitted to both the first holder 68 and the pressure regulating valve cover 67.

  The pressure regulating valve cover 67 is for restricting the movement range of the pressure regulating valve 65, and is provided with a plurality of holes 77 for guiding the steam discharged from the pressure regulating hole 70 to the steam port unit 61. Further, since the inner lid 56 is sandwiched between the pressure regulating valve holder assembly 66 and the pressure regulating valve cover 67, the communication hole 62 of the inner lid 56 is not exposed.

  As shown in FIG. 3, the pressure regulating valve 65 is held by a second holder 69 as a pressure regulating valve holder. The second holder 69 is located below the pressure regulating valve 65 and is provided with a pressure regulating hole 78 that communicates the inside of the pan 11 and the outside of the lid 31. That is, when passing through the pressure regulating valve 78, the steam in the pan 11 is released to the outside air through the pressure regulating hole 70 and the steam port unit 61. Since the pressure regulating valve 65 is held so as to close the pressure regulating hole 78, the pressure in the pan 11 can be adjusted by the opening area of the pressure regulating hole 78 and the weight of the pressure regulating valve 23.

  Similar to the second holder 69, the first pressure regulating packing 71 as a holding means for holding the pressure regulating valve 65 uses a member having elasticity such as rubber. By using the first pressure regulating packing 71 as an elastic member, when the pressure regulating hole 78 is closed by the pressure regulating valve 65, the pressure regulating valve 65 abuts against the second holder 69 and elastically deforms, and the first pressure regulating packing 71 It becomes possible to improve the sealing performance and prevent steam leakage from the inside of the pan 11. Further, since the pressure regulating valve 65 closes the pressure regulating hole 78, the passage of the steam generated in the pan 11 can be closed, and the amount of steam released into the atmosphere can be reduced.

  79 is a detachable valve seat holder provided on the bottom surface of the second holder 69 exposed from the lower surface side of the inner lid 56. One or more holes 79a (see FIG. 6) are formed in the valve seat holder 79, whereby a first steam passage hole 80 extending from the hole 79a to the pressure regulating hole 78 is formed by the second holder 69. The

  On the other hand, the pressure adjusting unit 64 as the second pressure adjusting means 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. A safety valve holder 81 as a second valve seat holder mounted from the lower side of the communication hole 63, a dome-shaped safety valve cover 82 mounted from the upper side of the communication hole 63, and the safety valve holder 81 and the inside of the safety valve cover 82 The valve body 83 is configured to be movable, and the safety valve spring 84 biases the valve body 83 downward. An elastic body 85 is provided at the tip of the valve body 83, and an opening 86 as a second steam passage hole is formed in the safety valve holder 81 so as to face the elastic body 85, and the safety valve spring is formed. The elastic body 85 always blocks the open hole 86 by utilizing the elastic repulsive force 84. The load of the safety valve spring 84 at this time is higher than the operating pressure value of the pressure regulating valve 65, and is usually set so that the pressure regulating valve 65 is opened before the valve body 83 due to the pressure increase in the pan 11. The

  On the outer surface of the safety valve holder 81, a recess 81A as an engaging portion is provided. A convex portion 82A as an engaged portion of the safety valve cover 82 is engaged with the concave portion 81A. Here, the safety valve holder 81 is rotated to engage with the safety valve cover 82. Further, a convex portion (not shown) as an engaging portion is provided on the lower side surface of the second holder 69, and the convex portion is a groove between the convex portions as the engaged portion formed on the lower side surface of the safety valve holder 81. It is a structure that fits in. In this case, a recess may be formed on the lower side surface of the safety valve holder 81, and the protrusion of the second holder 69 may enter there. Regarding the engagement structure of each of these members, the relationship between the concave portion and the convex portion may be reversed, and the structure is not particularly limited as long as there is a restriction in the rotational direction.

  Next, a configuration related to the steam port unit 61 will be described with reference to FIGS. 4 and 5 together. The steam port unit 61 discharges steam generated from the inside of the pan 11 to the outside of the cooker, that is, outside the rice cooker. The steam port unit 61 is connected to the outer lid 32 and has a bottomed steam port 91 that is sealed to the outside, and a steam port. A steam port cap 92 that covers the upper opening of 91, and a steam port packing 93 that is fitted to the steam port cap 92 and is made of an elastic member for sealing between the steam port 91 and the steam port cap 92. . The steam port cap 92 is provided with a steam discharge port 92a that discharges the steam accumulated in the steam port unit 61 to the outside of the vessel. By doing so, the internal pressure in the pan 11 is kept at the vapor pressure.

The steam port 91 is provided with a cylindrical steam passage portion 94 through which steam from the pot 11 passes. When the steam port cap 92 is removed from the state shown in FIG. The passage portion 94 is exposed (see FIG. 5). 95 is a tubular steam passage means whose one end is detachably connected to the exposed steam passage portion 94. The steam passage means 95 may have a free shape such as a bellows shape, or a main body. 1 and the shape along the outline of the lid 31 may be used. Further, another end of the steam passage means 95 is detachably connected to an independent steam recovery means 96 which is a separate unit from the main body 1 and the lid 31. As a result, the steam generated from the inside of the pan 11 is collected by the steam recovery means 96 from the steam passage portion 94 of the steam port 91 via the steam passage means 95.

  The steam passage means 95 is provided with a steam passage cooling means 97 for cooling the steam passing through the steam passage means 95. Specifically, the steam passage cooling means 97 may wind a cooling member around the steam passage means 95 or send cold air to the steam passage means 95 by a blower equipped with a rotating fan. It is good also as a structure.

  The steam recovery means 96 is provided with a steam recovery means cooling means 98 for cooling the collected steam. The steam recovery means 96 at this time is configured such that a steam storage part 99 that stores the steam recovered through the steam passage means 95 and a steam recovery means cooling means 98 that is a cooling part of the steam storage part 99 are detachable. The steam recovery means cooling means 98 is configured to include a cooling device such as a blower that sends cold air to the steam accommodating portion 99 and a cooling member that cools the steam accommodating portion 99. In this way, after the steam passing through the steam passage portion 94 is cooled to some extent by the steam passage cooling means 97, the steam collected in the steam storage section 99 is further cooled by the steam recovery means cooling means 98, so that the steam The steam is reliably liquefied in the housing part 99. Therefore, it is possible to reliably suppress the steam generated from the pan 11 from being discharged outside the vessel.

  As an operation source for adjusting the sealing degree of the lid 31, that is, adjusting the internal pressure of the pan 11 by moving the pressure regulating valve 65, a solenoid 101 that moves the pressure regulating valve 65 in the pressure regulating unit 58 is provided in the outer lid cover 33 in the lid 31. Is provided. When the solenoid 101 is not energized, the tip is held in the advanced position and the pressure regulating valve 65 is retracted from the pressure adjusting hole 70, while when the solenoid 101 is energized, the tip is retracted and the pressure regulating valve 65 is adjusted. The pressure hole 70 is caused to roll by its own weight, the pressure adjusting hole 70 is closed, and the pressure is put into the pan 11.

  Here, the operation means of the pressure adjusting unit 58 will be described with reference to FIG. 6 in addition to FIGS. Inside the lid 31 is provided a pressure regulating solenoid 101 that moves the pressure regulating valve 65 in the pressure regulating unit 58 by causing the plunger 151 to appear and retract from the inside by electromagnetic force. Similarly, the pressure adjusting frame 152 that moves together with the plunger 151 toward the outer lid cover 33 and the flexible pressure adjusting packing 153 that holds the inside of the lid 31 in a watertight state are also the outer lid in the lid 31. The cover 33 is provided. The pressure regulating packing 153 has a concave mounting portion 153A that faces the pressure regulating portion 58 and fits to the periphery of the mounting hole provided in the outer lid cover 33. The pressure adjusting solenoid 101 and the pressure adjusting frame 152 are accommodated and arranged in a pressure regulating accommodating portion 154 formed in the lid 31 by the outer lid cover 33.

  The pressure adjusting frame 152 is an abbreviation of the pressure adjusting operation part 161 as the pressure adjusting valve operating means protruding toward the pressure adjusting valve 65, the frame part 162 provided so as to surround the pressure adjusting solenoid 101, and the pressure adjusting operation part 161. And a clamp operation restricting portion 163 as restricting means provided on the opposite side. The plunger 151 of the solenoid 101 and thus the pressure adjusting frame 152 are always positioned so as to push the pressure adjusting valve 65 in order to put the inside of the pan 11 into a non-pressurized state. The position of the pressure adjusting frame 152 at this time is defined as a first frame position. In particular, a portion of the pressure adjustment frame 152 that operates the pressure adjustment valve 65 is the pressure adjustment operation unit 161. In this way, when the lid 31 is to be opened, the inside of the pan 11 is communicated with the outside air, and a smooth lid opening operation can be obtained without being affected by negative pressure.

  On the other hand, when rice cooking is started, the plunger 151 of the solenoid for pressure regulation 101 moves to the retracted position which is the second frame position. At this time, the pressure adjusting operation part 161 of the pressure adjusting frame 152 releases the pressure on the pressure adjusting valve 65, and the pressure adjusting valve 65 closes the pressure adjusting hole 70. Further, the clamp operation restricting portion 163 of the pressure adjusting frame 152 is disposed so as to sink under the base end portion 44A of the clamp 44, and restricts the movement of the clamp 44 from the clamp receiver 50 in the disengagement direction. Therefore, in this case, even if the clamp 44 is pushed by the lid opening button 46, the movement of the clamp 44 is restricted and the engagement with the clamp receiver 50 cannot be released.

  Conversely, when the plunger 151 of the pressure regulating solenoid 101 is in the advanced position, which is the first frame position, the clamp operation restricting portion 163 is separated from the base end portion 44A of the clamp 44, and the operation of the clamp 44 is not restricted. . Therefore, in this case, when the lid opening button 46 is pushed, the clamp 44 is detached from the clamp receiver 50 and the lid 31 is opened. The clamp operation restricting portion 163 may be any shape as long as it has a position and a shape for restricting the operation of the clamp 44, even if it does not go under the base end portion 44A of the clamp 44.

  As another example, a pressure detection means (not shown) is arranged below the movable portion of the pressure adjusting frame 152 in the outer lid cover 33, and the pressure detection valve is urged downward by, for example, a spring that is an elastic member. It may be configured. In this case, the upper part of the pressure detection valve is configured to push up the clamp operation restricting means. In addition, a packing is provided between the pressure detection valve and the clamp operation restricting means to move the clamp operation restricting means up and down in accordance with the vertical movement of the pressure detection valve according to the pressure state inside the pan 11. The pressure detection valve is held by, for example, a cover and a holder, and the pressure detection valve is always urged downward by the spring provided between the lower side of the pressure detection valve and the cover. Further, it is preferable to provide a packing for sealing between the pressure detection unit and the inner lid 56.

  In this example, when the internal pressure of the pan 11 reaches a predetermined value, the pressure detection valve moves upward. This occurs when the ratio between the area directly receiving the pressure from the pan 11 and the internal pressure below the pressure detection valve is higher than the biasing force of the spring. When the pressure detection valve moves upward against the biasing force of the spring, the clamp operation restricting means also moves upward. The clamp operation restricting means that moves upward and protrudes becomes a position that prevents the operation of the frame, that is, the third frame position that prevents the return from the second frame position to the first frame position. At this time, the pressure regulating valve 65 is disposed so that the pressure regulating hole 70 is opened and the frame 152 is under the base end portion 44A of the clamp 44.

  FIG. 7 shows the periphery of the clamp 44 with the normal lid 31 closed, and FIG. 8 shows the periphery of the clamp 44 with foreign matter interposed between the lid 31 and the main body 1. . In each of these drawings, the shortest distance between the perpendicular passing through the center of the clamp shaft 45 and the tip 44D of the engaging portion 44C of the clamp 44 locked to the clamp receiver 50 is expressed as an engagement amount T (= T1, T2). The engagement amount T may be based on a perpendicular line passing through the tip 50A of the clamp receiver 50 instead of the center of the clamp shaft 45. The engagement amount T2 shown in FIG. 8 is smaller than the engagement amount T1 shown in FIG.

  As shown in FIG. 8, when the lid 31 is closed with respect to the main body 1 with foreign matter such as rice grains intervening on the upper surface of the upper frame 2 facing the lower side of the lid 31, the gap between the lid 31 and the main body 1. Becomes larger than the case where no normal foreign matter is present. At this time, the engagement portion 44 </ b> C, which is a locking portion of the clamp 44, has an engagement amount T that is less than usual with respect to the clamp receiver 50. The posture of the clamp 44 rotates with respect to the normal and tilts toward the main body 1 side. When the inclination of the clamp 44 is equal to or greater than a predetermined value, the engagement amount T with the clamp receiver 50 is also equal to or less than the predetermined amount (= T2). In this case, as shown in FIG. 9, if the position of the tip 50 </ b> A of the clamp receiver 50 is set behind the position of the tip 44 </ b> D in the engaging portion 44 </ b> C of the clamp 44, the relationship between the clamp 44 and the clamp receiver 50. Stop does not occur. Further, by making the position of the tip 50A of the clamp receiver 50 behind the center of the clamp shaft 45, the rotation of the clamp 44 to be released from the clamp receiver 50 by the vapor pressure received by the lid 31 can be prevented.

  As shown in FIG. 10, the engaging portion 44C of the clamp 44 is formed so as to become higher from the root 44E connected to the hanging portion 44B toward the tip. Thereby, even if the posture of the clamp 44 rotates relative to the normal and tilts toward the main body 1, the tip 44D of the engaging portion 44C of the clamp 44 can be reliably engaged with the clamp receiver 50. it can. Since the engaging portion 44C of the clamp 44 is locked to the clamp receiver 50 behind the clamp shaft 45, the rotation of the clamp 44 to be released from the clamp receiver 50 by the vapor pressure received by the lid 31 can be prevented.

  The clamp receiver 50 is formed so that the tip 50A of the receiving surface is positioned lower than the root 50B. Even if the clamp 44 is lifted upward together with the lid 31 and the clamp receiver 50 is deformed when the inside of the pan 11 is at atmospheric pressure or higher, the tip 44D of the engaging portion 44C of the clamp 44 is clamped by the clamp receiver 50. The purpose is to ensure that the base 50B can be engaged.

  Next, the reinforcing structure of the rice cooker will be described in detail with reference to FIGS. FIG. 11 shows the internal structure of the lid 31. On the outer lid cover 33, which is the base material of the lid 31, lid reinforcing plates 111 and 112 are arranged as lid reinforcing means that are divided into left and right pairs. The lid reinforcing plates 111 and 112 are for supplementing the strength of the lid 31 and are made of, for example, a metal material having higher rigidity than the outer lid cover 33 made of synthetic resin. Is formed in a linear shape extending in the front-rear direction of the lid body 31. The lid reinforcing plates 111 and 112 have a structure that is fixed to the outer lid cover 33 by a fastening member such as a screw 113, for example.

  Holes 114 through which the clamp shaft 45 penetrates are provided on the front side of the lid reinforcing plates 111 and 112, and each end of the clamp shaft 45 is passed through the holes 114 so that the clamp shaft 45 is attached to the lid reinforcing plate 111, Concatenated with 112. Further, holes 115 through which the hinge shaft 41 as a hinge shaft passes are provided on the rear side of the lid reinforcing plates 111 and 112, and each end of the hinge shaft 41 is passed through the hole 115, so that the clamp shaft 45 Not only the hinge shaft 41 but also the lid reinforcing plates 111 and 112 are connected. Both the hinge shaft 41 and the clamp shaft 45 are metal members arranged in the left-right direction of the lid 31 and thus the rice cooker. By combining these members with the lid reinforcing plates 111 and 112, the hinge shaft 41 and the clamp shaft 45 are effective. Reinforcement is made.

  12 and 13 show the reinforcing structure in the upper frame 2. In each of these drawings, a clamp reinforcing plate 121 as a frame plate which is a main body reinforcing means is provided on the lower surface of the upper frame 2. This frame plate may receive the entire surface so as to withstand the pressure applied by the pan 11, and when the pressure from the pan 11 is low, the frame plate is provided around the clamp 44 and the hinge portion 38 connected to the lid 31. May be provided only. Here, the clamp reinforcing plate 121 is made of, for example, a metal material having higher rigidity than the upper frame 2 made of synthetic resin, and is disposed to extend in the left-right direction along the front surface of the upper frame 2.

  FIGS. 14 and 15 are views showing a state where the clamp reinforcing plate 121 is attached. The clamp reinforcing plate 121 is formed by screwing a fastening member such as a screw 122 to a cover member 50B forming the clamp receiver 50. FIG. The upper frame 2 is fixed to the lower side. Since the clamp 44 is lifted upward together with the lid 31 when the inside of the pan 11 is pressurized, the clamp receiver 50 engaged with the clamp 44 is connected to the frame plate or the clamp reinforcing plate 121 for reinforcement.

  FIG. 16 is a view showing a reinforcing structure for the hinge portion 38. Here, a hinge reinforcing plate 131 that reinforces the bottom of the hinge portion 38 and a shaft reinforcing plate 132 that reinforces the attachment of the hinge shaft 41 and the upper frame 2 are provided as the main body reinforcing means. The hinge reinforcing plate 131 and the shaft reinforcing plate 132 are both made of, for example, a metal material having higher rigidity than the upper frame 2, and are arranged extending in the left-right direction along the rear surface of the upper frame 2. The hinge reinforcing plate 131 is fixed to the upper frame 2 by a fastening member such as a screw 133, for example. Similarly, the shaft reinforcing plate 132 is also fixed to the upper frame 2 by another fastening member such as a screw 134. In particular, the shaft reinforcing plate 132 forms a U-shaped receiving portion 135 corresponding to the outer shape of the hinge shaft 41, and the hinge shaft 41 abuts on the receiving portion 135 when the inside of the pan 11 is pressurized. Thus, the force applied to the upper frame 2 from the hinge shaft 41 can be relaxed. Further, when the frame plate is divided into the clamp reinforcing plate 121 and the hinge reinforcing plate 131, the respective members are arranged in a positional relationship substantially orthogonal to the divided lid reinforcing plates 111 and 112. This is to effectively reinforce the applied pressure.

  141 is a pressure reducing means provided to lower the inside of the pan 11 below the normal atmospheric pressure with the lid 31 closed to the main body 1. The decompression means 141 opens and closes a decompression pump 142 as a decompression drive source, a tubular route (not shown) from the decompression pump 142 to a hole (not shown) provided in the inner lid 56, and the route. It is comprised by the solenoid valve 143 (refer FIG. 17). In this embodiment, the decompression pump 142 is provided at the rear part of the lid 31, but may be provided at the rear part of the main body 1.

  When the lid body 31 is closed with the inner lid assembly 55 attached to the lower surface of the lid body 31, the inside of the pan 11 and the decompression pump 142 communicate with each other. When the decompression pump 142 is started from this state, the air in the pan 11 is discharged to the outside of the main body 1 through the decompression pump 142, and the pressure in the sealed pan 11 is reduced. Moreover, when the pressure in the pan 11 falls below a certain value by the atmospheric pressure, the electromagnetic valve 143 can block the path and keep the inside of the pan 11 in a reduced pressure state. Further, even when the pressure in the pan 11 rises due to the slow leak, the decompression pump 142 is activated with the path opened, and the inside of the pan 11 is maintained at a state lower than the atmospheric pressure.

  Returning to FIG. 1 again, an operation panel 191 is provided at the front of the main body 1. Inside this operation panel 191 is an LCD 192 that displays the time and the selected rice cooking course, and an LED that displays the current process, rice cooking, and a rice cooking course, although none of them are shown in the figure. A substrate on which an operation switch 193 (see FIG. 17) and the like are disposed is disposed. The operation panel 191 has an operation unit for displaying button names and the like. This operation unit also prevents dust and water from adhering to the control means which is an electronic component. The operation panel 191 may be provided on the front side of the lid 31.

  Reference numeral 171 denotes a heating control means provided in front of the main body 1. The heating control means 171 includes a heating element (not shown) for driving the heating coil 16 serving as a heating means 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 172 made of a material having good thermal conductivity, such as aluminum, and emits from a cooling fan 173 that is a cooling means. The element is driven within the operating condition temperature by applying heat to the heat radiator 172 to remove heat.

  The cooling fan 173 is disposed below or on the side of the radiator 172 attached to the heating control means 171. In addition, a hole is formed in the bottom or side of the main body 1 for discharging the air that is emitted from the cooling fan 173 and takes heat from the radiator 172 attached to the heating control means 111 to the outside of the main body 1. A plurality of 174 are provided. The heating control means 171 is housed inside the product, that is, in the main body 1, but may be disposed at any position on the outer periphery of the pan 11. Further, the hole 174 provided in the bottom or side of the main body 1 may be arranged at any position. However, in recent years, there is a demand for miniaturization of products, and the heating control means 171 and the cooling fan 173 and the hole 174 for discharging warm air are arranged at approximately opposite positions across the pan 11. Is preferred.

  Next, the control system will be described with reference to FIG. In the same figure, 171 is the above-mentioned heating control means, which accepts each temperature information from the pan temperature sensor 17 and the lid temperature sensor 60, an operation signal from the operation switch 193, etc. 11 controls the heating coil 16 that heats the bottom of 11, the cord heater 18 that heats the side of the pan 11, and the lid heater 35 that heats the lid 31, and the above-described decompression pump 142 and electromagnetic valve 143. In addition, the solenoid 101 provided inside the lid 31 and the display means 128 including the LCD 192 are respectively controlled. In particular, the heating control means 171 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 controls the temperature based on the temperature detected by the lid temperature sensor 60. The lid heater 35 is controlled to control the temperature of the heat radiating plate 34 and the inner lid 56. The heating control means 171 includes, as a function on the control sequence of the program stored in its own storage means (not shown), rice cooking control means 178 for cooking rice to be cooked in the pan 11 during rice cooking, Insulating rice in the pan 11 at a predetermined time stored in advance in the storage means in response to the instruction for starting the reserved rice cooking from the operation switch 193 and the heat control means 179 that heats and heats the rice in the pan 11 to the predetermined temperature There is provided a reserved rice control means 181 capable of executing a reserved rice cooking course for controlling the rice cooking control means 178 so that the food is cooked.

  Reference numeral 182 denotes a heating coil driving unit that incorporates a high-frequency inverter circuit that receives a control signal from the heating control unit 171 and supplies a predetermined high-frequency current to the heating coil 16. Separately from this, the output side of the heating control means 171 receives a control signal from the heating control means 171 and drives the lid heater 35 so as to heat the radiator plate 34 and the inner lid 56. 183, code heater driving means 184 for turning on the code heater 18, solenoid driving means 185 for turning on or off the solenoid 101, pump driving means 186 for driving the decompression pump 142, and electromagnetic valve 143 on or off Electromagnetic valve driving means 187 for controlling the display and display driving means 189 for driving the display means 128 are provided. At the time of cooking by the rice cooking control means 178 and at the time of heat insulation by the heat insulation control means 179, the heating coil 16 heats the bottom of the pot 11 and the code heater 18 by detecting each temperature from the pot temperature sensor 17 and the lid temperature sensor 60. Heating to the side surface of the pan 11 by heating and heating to the lid body 31 by the lid heater 35 are performed. In addition, after the rice cooking by the rice cooking control means 178 is finished and the cooked food in the pan 11 is cooked as rice, it automatically shifts to heat insulation by the heat insulation control means 179, 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 20 to the space between the lid 31 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 171 in the present embodiment is a period until the rice cooking at the time of standby for reserved rice by the reservation rice cooking control means 181 or the time until the rice cooking control means 178 starts substantial rice cooking. Depressurization control for operating the depressurization pump 142 and the depressurization state maintaining electromagnetic valve 143 so that the inside of the pan 11 becomes lower than the atmospheric pressure after the period and the heat retention control means 179 determine that the above-described heat retention is in a stable state. A function as means 190 is also provided.

  Next, operation | movement of the rice cooker in the said structure is demonstrated. When rice and water to be cooked are put in the pan 11 and a rice cooking key of the operation switch 193 is operated, for example, rice cooking by the rice cooking control means 178 starts. Here, the rice cooking control means 178 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. During this time, the pressure reducing pump 142 and the electromagnetic valve 143 of the pressure reducing means 141 are operated. When the inside of the pan 11 is at atmospheric pressure or lower, the pressure adjusting solenoid 101 is energized (on), and the pressure adjusting solenoid 101 is turned on. Plunger 151 moves to the retracted position. As a result, the pressure adjusting operation part 161 is separated from the pressure adjusting valve 65, the pressure adjusting valve 65 closes the pressure adjusting hole 70 of the first pressure adjusting packing 71, and the inside of the pan 11 is secured. In addition, since the clamp operation restricting portion 163 sinks below the base end portion 44A of the clamp 44, the rotation of the clamp 44 is restricted, and even if the lid opening button 46 is pushed, the clamp 44 and the clamp receiver 50 The engagement is locked and the lid 31 is prevented from opening.

  When the start of the process is started, the decompression control means 190 turns on the decompression selection switch until just before substantial rice cooking is started, and displays on the LCD 192 of 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. After that, the decompression control unit 190 stops driving the decompression pump 142 and closes the path by the electromagnetic valve 143 to maintain the inside of the pan 11 in a decompressed state. The decompression control means 190 again drives the decompression pump 142 and opens the path by the electromagnetic valve 143 to discharge air from the pot 11. By repeating such an operation, the pressure reducing pump 142 and the electromagnetic valve 143 are simultaneously turned on and off, and the pressure in the pan 11 is maintained at a value within a desired range.

  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 65 is placed on the first pressure regulating packing 71 and closes the pressure regulating hole 70 of the first pressure regulating packing 71, 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 is over, the rice cooking control means 178 starts a substantial rice cooking operation, the decompression control to the pan 11 by the decompression control means 190 is interrupted, the decompression selection switch is turned off, and the LCD 192 The display indicating that the pressure is reduced is also stopped. At the same time, the decompression pump 142 and the electromagnetic valve 143 are turned off until the subsequent heat retention becomes stable.

  When shifting to the rice cooking process, the rice cooking control means 178 strongly heats the pan 11 with 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 31 is stabilized at 90 ° C or higher, it is assumed that the inside of 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 178 turns off the solenoid 101 and retracts the pressure regulating valve 65 from the pressure regulating hole 70. As a result, the pan 11 is maintained at substantially atmospheric pressure.

  It should be noted that the fact that the temperature of the lid 31 is stable at 90 ° C. or higher is detected by the rate of temperature increase of the detected temperature from the lid temperature sensor 60. In this boiling detection, the pan temperature sensor 17 and the lid temperature sensor 60 can confirm that both the bottom of the pan 11 and the lid 31 have reached 90 ° C. or more, and the pan 11 has completely boiled. Can be detected accurately.

  If any of the bottom of the pan 11, the side surface of the pan 11, or the lid 31 reaches a detection temperature that is not normally 120 ° C. or higher, the heating control means 171 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 31 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 31 other than that. When the temperature is lower than 90 ° C, the pan temperature sensor 17 or the lid temperature sensor 60 in the low temperature state determines that the temperature detection accuracy has deteriorated for some reason (dirt, tilt, poor contact, etc.). Similarly, the amount of heating in rice cooking heating is reduced so that all operations are stopped, or the operation is shifted to unevenness, or the heat is kept, and this is dealt with.

  When shifting to continuation of boiling, the rice cooking control means 178 starts lid heating by the lid heater 35. The lid heating here is managed by the temperature detected by the lid temperature sensor 60 so that the temperature of the inner lid 56 becomes 100 to 110 ° C. 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 178 is terminated, and the heat insulation control means 179 shifts to the heat insulation process. It shifts to nomura. During unevenness, the lid heater 35 is cut off by temperature control based on the temperature detected by the lid temperature sensor 60 to prevent the inner lid 56 from being exposed to dew and the temperature is high enough to prevent the rice from burning. 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 179.

  When it is warming, the heating coil 16 heats the bottom and the lower side of the pan 11 and is slightly higher than the temperature of the rice accommodated in the pan 11, and the lower surface of the lid 31 is heated by the lid heater 35. The temperature of the side of the pan 11 is controlled by the cord heater 18 so that the rice does not dry and a large amount of dew does not adhere. The temperature of the rice in the pan 11 is maintained at 70 to 76 ° C. Even when the temperature is kept, the pan temperature sensor 17 and the lid temperature sensor 60 are abnormally high or abnormally low. Detects abnormalities and prevents this abnormal heating.

  As described above, when the boiling state in the pan 11 is detected, cooking (continuous boiling heating) and unevenness are performed continuously. The rice cooking control means 178 stops the operation of the decompression means 141, turns on the pressure regulating solenoid 101, and closes the pressure regulating hole 70 with the pressure regulating valve 65. Thereby, while cooking rice cooking is continued, the communication between the inside of the pan 11 and the outside is blocked, and the pressure in the pan 11 increases. At this time, since the clamp operation restricting portion 163 sinks below the base end portion 44A of the clamp 44, the engagement between the clamp 44 and the clamp receiver 50 is locked, and the lid 31 cannot be opened.

  After that, when it is detected that the inside of the pan 11 has reached a predetermined pressure, the pressure adjusting solenoid 101 switches from the on state to the off state, so that the pressure adjusting operation unit 161 pushes the pressure adjusting valve 65. The pressure adjusting hole 70 is opened and the pressure in the pan 11 approaches the atmospheric pressure.

  When shifting to the unevenness, the operation of gradually returning the inside of the pan 11 to the atmospheric pressure is performed in consideration of the fact that the lid 31 can be opened immediately after the start of the subsequent heat insulation. Then, the heat retaining control means 179 first switches the pressure regulating solenoid 101 from the on state to the off state in the middle of unevenness, retracts the pressure regulating valve 65 from the pressure regulating hole 70, opens the pressure regulating hole 70 and opens the pan 11 Return inside to atmospheric pressure.

  Immediately after the unevenness that is substantial rice cooking is completed and the process proceeds to the heat retaining step, the inside of the pan 11 communicates with the outside through the pressure adjusting hole 70 and is maintained at atmospheric pressure. At the same time, since the clamp operation restricting portion 163 is located away from the lower side of the base end portion 44A of the clamp 44, the lid 31 can be freely opened and closed.

  When the rice cooking process is finished, the heat retention control means 179 starts measuring the heat retention elapsed time, and when the heat retention elapsed time reaches a preset time, the pressure in the pan 11 becomes lower than the atmospheric pressure by the pressure reduction control means 190. As described above, the pressure reduction pump 142 and the electromagnetic valve 143 are controlled again. At the same time, the pressure adjusting solenoid 101 is turned on in order to seal the inside of the pan 11. 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 step, not after a predetermined time of the heat retaining step.

  Thereafter, the decompression control unit 190 stops driving the decompression pump 142, closes the path by the electromagnetic valve 143, maintains the inside of the pan 11 in a decompressed state, and considers the pressure rise due to the slow leak, and a certain time has elapsed. Then, the decompression control means 190 drives the decompression pump 142 again and opens the path by the electromagnetic valve 143 to discharge air from the pot 11. Thereafter, the above-described operation is repeated, and the pressure reducing pump 142 and the electromagnetic valve 143 are simultaneously turned on and off, and the pressure in the pan 11 is maintained at a value within a desired range.

In this embodiment, the relationship between the diameter of the pressure adjusting hole 78 formed in the second holder 69 and the weight of the pressure adjusting valve 65 is 0.4 kgf / cm ² (pressure at which a force of 0.4 kg weight per square centimeter acts). ). By doing so, when the pressure regulating valve 65 closes the pressure regulating hole 78, the inside of the pan 11 can be cooked to 1.4 atmospheres (1 atmosphere = 1013 hectopascals). That is, it can be said that the pressure regulating unit 58 here has a configuration for controlling the pressure in the pan 11 by the load per unit area by the pressure regulating valve 65.

  When cooking is started and a predetermined process is started, the plunger 151 moves to the second frame position, and the pressure regulating valve 65 closes the pressure regulating hole 78. In this state, rice cooking heating to the pan 11 by the heating coil 16 is reduced, and heating is performed by the temperature detected from the lid temperature sensor 60 so that the internal pressure of the pan 11 becomes 1.05 atm. Since the boiling point is 110 ° C. at 1.4 atmospheres, steam is not generated even when cooking at 1.05 atmospheres. In this way, when cooking rice in the pan 11 in a pressurized state, since the boiling point is 100 ° C. or higher, even if the heating control is performed so that the internal temperature of the pan 11 is 100 ° C. during cooking, Since the inside of the pan 11 is below the boiling point, no steam is generated. Therefore, unless the pressure adjusting hole 78 is opened, no steam is generated outside the container. The internal pressure of the pan 11 can be detected by converting the temperature detected from the lid temperature sensor 60 into pressure by the heating control means 171.

In addition, here, only when a predetermined rice cooking course is selected, heating control is performed so that a load (0.2 kgf / cm ² or less) less than half of the load by the pressure adjusting unit 58 works from the pot 11 during the rice cooking process. The means 171 preferably controls the heating coil 16. Thereby, rice cooking heating can be reduced while maintaining the pressure regulating valve 65 in the closed state, and generation of steam can be effectively suppressed. Further, by reducing the load from the inside of the pan 11 as necessary, the reinforcing structure as a rice cooker can be minimized, and the product size can be reduced and the number of parts can be suppressed.

  Thus, in this embodiment, in the rice cooker provided with the pan 11 as the inner pot, the heating coil 16 as the heating means for heating the pan 11, and the lid 31 covering the pan 11, the lid 31 is provided with A steam port 91 as a discharge part for discharging the steam generated from the inside of the pan 11 to the outside of the vessel, and a steam passage means as a passage means for connecting the steam port 91 and a steam recovery means 96 as a recovery means The steam passage means 95 is provided with steam passage cooling means 97 as first cooling means for cooling the steam passing through the steam passage means 95, and the steam recovery means 96 includes the steam recovery means. Steam recovery means cooling means 98 is provided as a second cooling means for cooling the steam recovered in 96, the steam passage means 95 is configured to be detachable from the lid 31, and the steam recovery means 96 is attached to and detached from the steam passage means 95. The steam storage part 99 which is configured freely and is a steam storage part, and the steam storage And a freely vapor recovery means the cooling means 98 removably to section 99.

  In this case, the steam generated from the inside of the pan 11 is cooled by the steam passage cooling means 97 when passing through the steam passage means 95 from the steam port 91 and further reaches the steam recovery means 96, and then another steam recovery means cooling means 98. Therefore, it is possible to reliably liquefy and recover the vapor without preparing cooling water, and to suppress the discharge of the vapor to the outside of the vessel, thereby improving usability. In addition, the steam passage means 95 and the steam recovery means 96 can be detached independently, and the steam storage section 99 and the steam recovery means cooling means 98 of the steam recovery means 96 can be removed separately, so that the steam passes. Although it is a route, the cleaning property can be improved.

  Further, in the present embodiment, a pressure adjusting unit 58 is provided as an adjusting means for adjusting the pressure in the pan 11 or the like. The pressure adjusting unit 58 includes a pressure adjusting valve 65 that forms a valve body, and the pressure adjusting valve 65. The first pressure regulating packing 71 as a holding means for holding the pressure regulating valve 65 is configured to close the pressure regulating valve 65 when a predetermined process starts. The first pressure regulating packing 71 itself has an elastic member. doing.

  In recent years, there has been a demand for rice cookers with little steam or no steam in order to maintain the hygienic storage location and usage environment of rice cookers. In response, let's provide forced steam exhaust and dedicated steam passages. Then, a big design change is forced. However, according to the present embodiment, by using an elastic member as the first pressure regulating packing 71 serving as the holding means, the sealing performance between the pressure regulating valve 65 and the first pressure regulating packing 71 is improved. Therefore, when the pressure regulating valve 65 is in a closed state, it is possible to reduce steam leakage through the pressure regulating section 58 and reduce the generation of steam outside the rice cooker, and an easy assembly method that is inexpensive and compact. Although it is a structure, the performance as a rice cooker can be improved.

  The pressure regulating unit 58 here includes a first holder 68 and a second holder 69 as holders for holding the first pressure regulating packing 71, and a pressure regulating valve cover 67 as a cover for covering the pressure regulating valve 65. The pressure regulating valve cover 67 has a claw 67 a that passes through the first holder and engages with the engaged portion 76 of the second holder 69.

  In this case, conventionally, when the pressure adjustment (pressurization / depressurization) at the time of cooking rice is repeated, or when the inside of the pan 11 is repeatedly kept warm for a long time, the fitting of the pressure adjustment unit 58 is loosened. In this embodiment, the second holder 69 is engaged not only with the first holder 68 but also with the pressure regulating valve cover 67, so that the pressure regulating portion 58 is more firmly engaged. The structure can be realized, for example, when the inside of the pan 11 is depressurized, the second holder 69 is prevented from being pulled into the inside of the pan 11 and the sealing performance between the pressure regulating valve 65 and the first pressure regulating packing 71 is achieved. Can be prevented. As a result, the conventional problem can be improved and a rice cooker excellent in maintaining the airtightness of the pressure adjusting unit 58 can be provided.

  Further, the pressure adjusting unit 58 in the present embodiment has a configuration for controlling the pressure in the pan 11 by the load per unit area by the pressure adjusting valve 65, and only during a cooking process when a predetermined cooking course is selected. A heating control means 171 as a control means for controlling the heating coil 16 is provided so that a load equal to or less than a predetermined amount (for example, half) of the load by the pressure adjusting unit 58 is applied from the inside of the pan 11.

  Thus, only when a predetermined cooking course is selected, cooking such as rice cooking is performed by controlling the heating coil 16 so that the load from the inside of the pan 11 is, for example, half or less of the load by the pressure adjusting unit 58. Therefore, it is possible to reduce the heating of rice cooking while maintaining the pressure regulating valve 65 in the closed state, and to effectively suppress the generation of steam. Further, by reducing the load from the inside of the pan 11 as necessary, the reinforcing structure as a rice cooker can be minimized, and the product size can be reduced and the number of parts can be suppressed.

  Next, a description will be given of a modification in which a storage unit 201 that collects steam is disposed on the lid 31 separately from the steam port unit 61. FIG. 18 is a view of the inner lid 56 as seen from the bottom side. FIG. 19 shows a state where the storage unit 201 is attached to the lid 31. The storage unit 201 is configured to communicate with an open hole 86 of the second pressure adjusting unit 64 provided in the inner lid 56, and has a container-shaped storage body 202 having an open lower surface and an opening outside the storage body 202. A first connecting portion 203 that protrudes in the direction of the head, and a concave second connecting portion 204 formed in the body portion of the housing main body 202. The first connection portion 203 of the storage unit 201 is attached to the safety valve cover 82 of the pressure adjusting portion 64, and the elastic ring packing 205 is attached to the second connection portion 204, and the storage unit 201 is the steam port unit. Similar to 61, the lid 31 is detachably provided. Here, a large amount of Oneba is contained in the steam generated from the inside of the pan 11 and flows into the storage unit 201 through the opening hole 86, so that the storage unit 201 can be easily cleaned by itself. It is desirable to make it a structure that can be attached and detached.

  The storage unit 201 has a shape that can be divided, regardless of the shape of the top, bottom, left, and right. At that time, it is preferable to provide the packing 205 for sealing at the mating portion of the divided body. In this way, it is possible to easily clean up to the inside of the storage unit 201.

  In this modification, instead of the pressure reducing means 141 described above, a lid 211 is provided on the lid 31 as a suction means for bringing the inside of the pan 11 to atmospheric pressure or less. As the suction means, a piston type that reciprocates in the container body 202 may be employed instead of the pump type here. The opening hole 86 is provided with a pressure adjusting unit 64 that allows the communication between the inside of the pan 11 and the storage unit 201 to be freely opened and closed. The pressure adjusting unit 64 opens and closes the opening hole 86 by the valve body 83, thereby The communication between the inside 11 and the storage unit 201 can be freely opened and closed. The storage unit 201 is connected to the pump 211 separately from the connection position of the opening hole 86. As a result, the pump 211 can be driven to bring the inside of the storage unit 201 to atmospheric pressure or less. Further, by closing the opening hole 86 by the valve body 83, the inside of the storage unit 201 can be maintained at atmospheric pressure or lower.

  FIG. 20 shows the flow of steam in the present modification with white arrows. In the figure, an inner lid 56 detachably provided on the lid 31 includes a pressure adjusting valve 65, first communication opening / closing means 231 including a safety valve and a check valve not shown in the above example, and an electromagnetic valve. A second communication opening / closing means 232 comprising a valve body 83 is provided, and the first communication opening / closing means 231 opens and closes the communication hole 62 as the first steam passage hole provided in the inner lid 56, while the second communication opening / closing means 231. The means 232 is configured to open and close the communication hole 63 as the second steam passage hole provided in the inner lid 56. In the lid 31, the steam that has passed through the first communication opening / closing means 231 is discharged to the outside air via the steam port unit 61, and the steam that has passed through the second communication opening / closing means 232 Collected in the storage unit 201. A vacuum pump 211 is connected to the storage unit 201. When the inside of the storage unit 201 is brought into a vacuum (decompression) state, the pump 211 is driven to discharge steam from the storage unit 201 through the pump 211 to the outside air. When a non-vacuum state is set, the storage unit 201 is configured to discharge the air as it is without passing through the pump 211.

  In the above configuration, by opening the valve body 83, pressure is exchanged between the pan 11 and the storage unit 201, and convection occurs in the pan 11. In addition, the steam discharged from the pan 11 is collected in the storage unit 201, and the pump 211 is operated to bring the storage unit 201 into a vacuum state, thereby liquefying saturated steam and reducing the volume of the recovered steam. It becomes possible. On the other hand, the flow of steam through the first communication opening / closing means 231 is slight.

On the other hand, in the rice cooker having a structure without the storage unit 201, the inside of the pan 11 can be in a reduced pressure state by the combination of the pressure reducing pump 142 and the electromagnetic valve 143 described above, but there is no circulation of steam here. The steam generated in the pan 11 is stored between the pan 11 and the first communication opening / closing means 231 by the first communication opening / closing means 231 closing the communication hole 62, and in the pressurized state, the steam is connected to the outside. A closed system with no pressure exchange is formed. At this time, the water surface in the pan 11 is pushed at 5 to ²⁰ kPa (0.05 to 0.2 kgf / cm ² ), and no convection occurs in the pan 11. Note that steam (about 10 g) that cannot be stored in the closed system is discharged from the steam port unit 61 to the outside air.

  Thus, in this modification, the pressure adjusting hole 78 as the first communication hole and the opening hole 86 as the second communication hole are respectively provided to open and close the pressure adjusting hole 78. And a valve body 83 as an on-off valve that opens and closes the opening hole 86. The steam that has passed through the pressure adjusting hole 78 is discharged to the outside through a steam port 91 that is a discharge portion. The storage unit 201 is configured to store the vapor that has passed through the storage unit 201, and the storage unit 201 can be disassembled into a plurality of members and is detachably attached to the lid 31.

  In this case, by providing at least two or more pressure adjusting holes 78 and opening holes 86, the opening hole 86 is opened and closed by the valve body 83 separately from the opening and closing of the pressure adjusting holes 78 by the pressure adjusting valve 65. It is possible to switch the presence or absence of steam discharge to the outside with a pressure regulating valve and an on-off valve. Therefore, steam discharge to the outside of the vessel can be reduced by raising the boiling point in the pan 11 and closing the pressure adjusting hole 78 and the opening hole 86. Also, when the valve body 83 is opened, pressure is exchanged between the pan 11 and the storage unit 201, and the steam discharged from the pan 11 is collected in the storage unit 201, so that the steam discharge outside the vessel is reduced. The rice cooker can improve the usability by causing convection in the pan 11 and improving the taste of rice. Furthermore, the steam generated from the inside of the pan 11 contains a large amount of Oneba, but the storage unit 201 can be removed from the lid 31 and the storage unit 201 itself can be disassembled into a plurality of members. The inside of the storage unit 201 can be easily cleaned, and the cleanability is improved.

  In addition, the pressure adjusting unit 58 here has a configuration that opens and closes the pressure adjusting hole 78 by the weight ratio of the pressure adjusting valve 65 and the opening area ratio of the pressure adjusting hole 78, and the valve body 83 is located before the pressure adjusting valve 65. It is comprised so that it may be in an open state.

  In this case, since the valve body 83 opens the opening hole 86 and discharges the steam to the storage unit 201 before the pressure regulating valve 65, the amount of steam discharged from the pressure regulating hole 78 through the steam port 91 is minimized. be able to. Even when the opening hole 86 is blocked for some reason, the inside of the pan 11 can be adjusted to a constant pressure by the pressure adjusting hole 78, and the safety as a rice cooker can be improved.

  Further, in the present modification, a pump 211 is provided as a suction unit that lowers the inside of the storage unit 201 to atmospheric pressure. Accordingly, the inside of the storage unit 201 is depressurized below the atmospheric pressure by the pump 211, so that the recovered steam can be liquefied, and the storage unit 201 and thus the capacity of the rice cooker can be reduced.

  In this modification, the pump 211 is driven before the valve body 83 is opened. When the steam in the pan 11 flows into the storage unit 201, the storage unit 201 is large in advance. Since the pressure is below the atmospheric pressure, the capacity of the storage unit 201 and thus the rice cooker can be further reduced.

  In addition, the proposal example applied to the said Example and modification is demonstrated based on FIG. In this figure, the time transition of the detected temperature of the pan temperature sensor 17, the heating control for the pan 11, and the internal pressure of the pan 11 is shown for each of the conventional control and the control proposed here.

  In the proposed example, the heating control means 171 performs the same processes as described in the above-described embodiment in each process from the diaper to the cooking. The difference is unevenness after cooking. In this process, the heating control means 171 controls the heating coil 16 and the like so that the amount of heating to the pan 11 is reduced compared to the previous step and the pan 11 is heated. To do. As a result, during the unevenness process, the pressure in the pan 11 decreases unilaterally with the passage of time and becomes less than atmospheric pressure, and the safety as a rice cooker is further improved. Moreover, it becomes energy saving by reducing the heating amount to the pan 11. FIG.

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

11 Pan (inner pot)
16 Heating coil (heating means)
31 Lid
58 Pressure regulator (adjustment means)
65 Pressure regulating valve
71 First pressure regulation packing (holding means)
78 Pressure adjusting hole (first communication hole)
83 Disc (open / close valve)
86 Open hole (second communication hole)
91 Steam outlet (discharge section)
95 Steam passage means (passage means)
96 Steam recovery means (recovery means)
97 Steam passage cooling means (first cooling means)
98 Steam recovery means cooling means (second cooling means)
99 Vapor container (container)
201 storage unit
211 Pump (suction means)

Claims (4)

An inner pot, a heating means for heating the internal pot in rice cooker provided with a lid covering the kiln,
A discharge part that is provided on the lid and discharges steam;
Passage means for connecting the discharge part and the recovery means,
The passage means is provided with first cooling means for cooling the passing steam,
The recovery means is provided with a second cooling means for cooling the recovered steam,
The passage means is configured to be detachable from the lid,
The recovery means is configured detachably with said passage means, and a housing portion of the steam, Ri Do and a freely the second cooling means removable relative to the housing portion,
An adjusting means for adjusting the pressure;
The adjusting means has a pressure regulating valve and a holding means for holding the pressure regulating valve, and is configured to close the pressure regulating valve when a predetermined process starts,
The holding means has an elastic member,
A first communication hole and a second communication hole for communicating the inside and outside of the inner hook;
The pressure regulating valve for opening and closing the first communication hole; and the opening and closing valve for opening and closing the second communication hole;
The steam that has passed through the first communication hole is discharged by the discharge unit, and the steam that has passed through the second communication hole is stored in a storage unit.
The storage unit is degradable, rice cookers, wherein Rukoto detachably attached to the lid. The adjusting means has a configuration that opens and closes the first communication hole by a weight ratio of the pressure regulating valve and an opening area ratio of the first communication hole,
Cooker according to claim 1, wherein said opening and closing valve is configured to be opened before the regulating valve. The rice cooker according to claim 1 or 2 , further comprising suction means for reducing the inside of the storage unit to atmospheric pressure or less. The rice cooker according to claim 3 , wherein the suction means is driven before the on-off valve is opened.