JP2015231451A - rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker with high usability and reliability.SOLUTION: The rice cooker includes: a rice cooking unit 10 having a body part 11 for storing an inner pot 14, and a lid body 12 for opening/closing an upper opening of the inner pot 14; and a heating unit 20 having a heating part 21 for heating the inner pot 14 and attachably/detachably supporting the rice cooking unit 10. The rice cooking unit 10 includes a through-hole 11f penetrating through both of an inner pot storage part 32 for storing the inner pot 14 and a lower surface of the body part 11 to be placed on the heating part, and a heat transmission plate 38 closing the through-hole 11f and capable of coming into contact with the lower surface of the inner pot 14. The heating unit 20 includes a protrusion part 21c to be inserted into the through-hole 11f, and a temperature sensor 25 protruding from an upper end side of the protrusion part 21c for measuring the temperature of the inner pot 14. When the rice cooking unit 10 is placed on the heating part 21 of the heating unit 20, the temperature sensor 25 comes into contact with the heat transmission plate 38 to detect the temperature of the inner pot 14.

Description

  The present invention relates to a rice cooker.

  As a conventional rice cooker that can separate the part that stores the pot and the part that heats the pot, the rice cooking unit that stores the pot is placed on the heating unit connected to the power source and cooked. Various things which can remove a unit from a heating unit and can carry only a rice cooking unit are proposed (for example, refer to patent documents 1).

JP 2000-41838 A

  However, in the rice cooker described in Patent Document 1, the center of the bottom portion of the inner body of the heat retaining container forms a convex portion upward, and supports the bottom portion of the inner pan when the inner pan is stored by the convex portion. The temperature of the bottom of the inner pot is detected through the section. Further, the inner pot is placed on the convex part, the flange portion of the inner pot is sandwiched between the heat insulating container and the lid unit, and the upper end opening step of the inner pot is covered with the inner lid.

  Therefore, since it has the structure which cannot absorb the dimension error of the depth direction of an inner lid, the dimension error of a convex part, etc., it is possible that the problem that a convex part does not contact the bottom part of an inner pot arises.

  An object of the present invention is to provide a rice cooker that is easy to use and highly reliable.

  The above object is achieved, for example, by the configurations described in the claims.

  According to the present invention, an easy-to-use and highly reliable rice cooker can be provided.

It is an external appearance perspective view which shows the rice cooker which concerns on this embodiment. It is a perspective view which shows the state which opened the cover body of the rice cooker. It is a perspective view which shows the state which looked up at the rice cooking unit from the lower side. It is a perspective view which shows the state which removed the rice cooking unit from the heating unit. It is a side view which shows the state which removed the rice cooking unit from the heating unit. It is a side view which shows the state which mounted the rice cooking unit in the heating unit. It is a top view which shows a rice cooker. It is the II sectional view taken on the line of FIG. It is the II-II arrow directional cross-sectional view of FIG. It is a side view which shows the state which fully opened the cover body of the rice cooker. It is a top view which shows the state which fully opened the cover body of the rice cooker. It is the III-III sectional view taken on the line of FIG. It is a perspective view which shows the shape of a heat insulating material. It is a figure explaining the effect by a projection part. It is a figure explaining an operation effect when putting a rice cooking unit on a table. It is sectional drawing which shows the rice cooker which concerns on a modification. It is a figure explaining the effect when the rice cooking unit after rice cooking is removed.

  Next, the rice cooker according to the embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the present embodiment, an electromagnetic induction type heating unit that heats the inner hook is described as an example, but another heating unit such as an electric heater may be applied.

  FIG. 1 is an external perspective view showing a rice cooker according to the present embodiment.

  As shown in FIG. 1, the rice cooker 1 includes a rice cooking unit 10 and a heating unit 20.

  The rice cooking unit 10 includes a main body part 11, a lid body 12 that covers the upper part of the main body part 11, and a handle 13. The external appearance constituted by the main body 11 and the lid 12 has a shape imitating a knee. The lid 12 is provided with an operation switch 12c for locking and unlocking the main body 11 and the lid 12. Although not shown, the lid body 12 may be provided with a biasing member that biases the lid body 12 in the opening direction.

  The heating unit 20 includes a heating unit 21 having a substantially truncated cone shape, and is configured such that the rice cooking unit 10 is placed on the upper surface of the heating unit 21. Thus, the rice cooking unit 10 can be stably supported by making the heating part 21 into a substantially truncated cone shape.

  In addition, the heating unit 20 is provided with an operation panel 22 along the circumferential surface on the front surface (front surface) of the heating unit 21. The operation panel 22 includes switches 22a for performing various settings, a display unit 22b for displaying an operation state, and the like. Further, the heating unit 20 is provided with a control circuit housing portion 23 having a substantially square box shape behind the heating portion 21. A power cord 24 is drawn out from the control circuit housing portion 23.

  FIG. 2 is a perspective view showing a state where the lid of the rice cooker is opened.

  As shown in FIG. 2, a bottomed cylindrical inner pot 14 (pot) is accommodated in the main body 11 of the rice cooking unit 10 (see FIG. 1). The inner hook 14 is formed of, for example, a composite material of a magnetic metal including a ferromagnetic metal such as iron and a nonmagnetic metal, and has a flange portion 14b on the entire periphery of the upper opening 14a. Moreover, the inner hook 14 is detachably accommodated in the inner hook accommodating portion 32 (see FIG. 8).

  The lid 12 opens and closes the upper opening 14a of the inner hook 14, and is composed of an outer lid 12a and an inner lid 12b. The lid 12 is rotatably supported at the rear end portion of the main body portion 11 via a hinge portion 12d (rotation shaft). The hinge part 12d is disposed so as to be located inside the circular shape of the main body part 11 in plan view.

  The outer lid 12a has a substantially disk shape, and has a recess 12a1 for accommodating the inner lid 12b on the lower surface. An operation switch 12c formed in an L shape from the upper surface to the side surface is attached to the front end of the outer lid 12a. The operation switch 12c is provided with a claw portion 12c1 that engages and locks a lock member 12e described later.

  The inner lid 12b has a packing 12b1 attached to the entire outer peripheral edge, and covers the upper opening 14a of the inner hook 14 when the lid body 12 is closed so as to keep the inside of the inner hook 14 in a substantially sealed state. It has become.

  The main body 11 has a substantially cylindrical shape and has an inner hook accommodating portion 32 (see FIG. 8) for accommodating the inner hook 14. Further, the main body portion 11 is formed with a substantially annular edge portion 11 a extending along the outer periphery of the inner hook 14. The width of the edge portion 11a is configured such that the front end portion 11a1 is formed to be the narrowest, gradually increases from the left and right sides toward the rear end portion 11a2, and the rear end portion 11a2 is the widest.

  A lock member 12e that engages and locks the operation switch 12c is provided at the front end 11a1 of the edge 11a. The lock member 12e can be configured by a known method.

  The hinge portion 12d is configured so as to be approximately within the width of the rear end portion 11a2 of the edge portion 11a. Thereby, when the cover body 12 is closed, the hinge part 12d does not protrude from the peripheral surface of the rice cooking unit 10 having a columnar shape.

  FIG. 3 is a perspective view showing a state where the rice cooking unit is looked up from below.

  As shown in FIG. 3, a recess 11 b is formed on the lower surface of the main body 11. The diameter of the recess 11b is shorter than the diameter of the main body 11, and an annular support portion 11c is formed around the recess 11b.

  As with the edge portion 11a, the width of the support portion 11c is such that the front end portion 11c1 is narrowest, gradually increases from the left and right sides toward the rear end portion 11c2, and the rear end portion 11c2 is widest. It is configured. In addition, the rubber | gum anti-slip | skid member 11d is engage | inserted in the multiple places (4 places in this embodiment) of the support part 11c, and the slip when it mounts on the table of the rice cooking unit 10 is prevented.

  In addition, a circular through hole 11f penetrating in the vertical direction is formed substantially at the center of the ceiling plate 11e of the recess 11b. The through hole 11f is closed by the heat transfer plate 38. The detailed shape of the heat transfer plate 38 will be described later.

  Moreover, the recessed part 11b has the truncated-conical space S10 so that it may reduce in diameter toward the upper direction. In addition, a positioning recess 11g that protrudes radially outward is formed on the side surface (circumferential surface) of the recess 11b. This positioning recess 11 g determines the mounting direction of the rice cooking unit 10 and the heating unit 20. In the present embodiment, the case where the concave portion 11b is convex toward the back is described as an example. However, the present invention is not limited to the rear, and is convex toward another direction such as the front or side. You may comprise so that it may become. Moreover, about the positioning recessed part 11g, it is not limited to one place, You may provide in multiple places.

  A handle support plate 11 h that protrudes rearward is provided on the back surface (rear surface) of the main body 11. The handle support plate 11h is formed in a substantially crescent plate shape, and is attached to a height position at which the handle 13 is supported in a rearward horizontal position. Note that both ends of the handle 13 are rotatably supported on the left and right side surfaces of the main body 11, and are configured to rotate in a range from forward to backward.

  FIG. 4 is a perspective view showing a state where the rice cooking unit is removed from the heating unit, and FIG. 5 is a side view showing a state where the rice cooking unit is removed from the heating unit.

  As shown in FIGS. 4 and 5, the rice cooking unit 10 can be detached from the heating unit 20 by lifting the rice cooking unit 10 upward. Thus, in the rice cooker 1 of this embodiment, after cooking rice, only the rice cooking unit 10 can be removed and put on a table (table).

  The heating unit 20 has a substantially frustoconical convex part 21 a on the upper surface of the heating part 21. The convex portion 21a has a shape along the inner surface of the space S10 (see FIG. 3) of the concave portion 11b. A substantially cylindrical protrusion 21c is formed at the center of the upper surface 21b of the protrusion 21a. The temperature sensor 25 is inserted inside the cylinder of the protrusion 21c, and the upper end (upper end face) of the temperature sensor 25 protrudes from the upper opening 21e of the protrusion 21c.

  Further, a positioning convex portion 21d that protrudes radially outward is formed on the side surface (circumferential surface) of the convex portion 21a. When this positioning convex part 21d fits with the positioning concave part 11g (refer FIG. 3) of the main-body part 11, the attachment direction of the rice cooking unit 10 and the heating unit 20 is determined. That is, the rice cooking unit 10 is placed on the heating unit 20 with the hinge 12d (see FIG. 2) positioned at the rear end (back side). Note that the positioning convex portion 21d may also be configured to be convex in another direction such as the front or the side so as to correspond to the positioning concave portion 11g.

  Moreover, the annular contact surface 21f with which the support part 11c (refer FIG. 3) of the rice cooking unit 10 contact | abuts is formed around the convex part 21a. Similarly to the support portion 11c, the abutment surface 21f is configured such that the front end portion 21f1 is formed to be the narrowest, gradually widens from the left and right sides toward the rear end portion 21f2, and the rear end portion 21f2 is widest. Has been.

  The control circuit housing part 23 has a substantially square box shape and is provided behind the heating part 21. Moreover, the control circuit accommodating part 23 has the curved surface 23a (refer FIG. 4) curved so that the curved surface (circumferential surface) of the main-body part 11 may be followed. Further, the upper surface 23 b of the control circuit housing part 23 is located above the upper surface 21 b of the heating part 21.

  FIG. 6 is a side view showing a state where the rice cooking unit is placed on the heating unit.

  As shown in FIG. 6, the upper surface 23b of the control circuit housing part 23 is located below the support plate 11h. The upper surface 23b is arranged with a slight gap from the lower surface of the support plate 11h. Thus, by raising the control circuit housing part 23, it can function as a guide member when the rice cooking unit 10 is set in the heating unit 20, and it is easy to set the rice cooking unit 10 in the heating unit 20. Become. Further, by raising the control circuit housing portion 23, it is possible to prevent the space for housing the control circuit 23c (see FIG. 8) from excessively projecting backward. Moreover, since the handle 13 is supported above the control circuit housing part 23 by the support plate 11h, the handle 13 does not get in the way when the rice cooking unit 10 is placed on the heating unit 20.

  A plurality of leg portions 26 are provided on the lower surface of the heating unit 20, and the heating unit 20 is supported by these leg portions 26. In addition, an air inlet 29 is formed at the lower side of the heating unit 20. Although not shown in the drawing, an exhaust port is provided at the lower part of the side surface of the heating unit 20 opposite to the left and right sides of the intake port 29.

  FIG. 7 is a plan view showing the rice cooker.

  As shown in FIG. 7, the outer peripheral surface 23 s of the control circuit housing portion 23 is formed to be curved, and the central portion in the circumferential direction is an end portion 23 e (outermost portion) located on the rearmost side of the rice cooker 1. It is configured as follows.

  The support plate 11h is formed in a crescent shape in a plan view, and is supported by a part of the handle 13 coming into contact with the front end (rear end) of the support plate 11h. By comprising in this way, the protrusion amount from the main-body part 11 of the support plate 11h can be decreased.

  When the rice cooking unit 10 is placed on the heating unit 20, the operation surface of the operation panel 22 protrudes outward from the rice cooking unit 10 and is configured to be obliquely upward. Thereby, even if it is the state where the rice cooker 1 is put in a low place and looks down at the rice cooker 1, the operativity and visibility of the operation panel 22 can be improved.

  8 is a cross-sectional view taken along the line II of FIG. In FIG. 8, a part is simplified (a part visible on the back side of the cross section is omitted).

  As shown in FIG. 8, the main body portion 11 is wound around the bottomed cylindrical body portion 31 constituting the outer shell, the inner hook accommodating portion 32 for accommodating the inner hook 14, and the inner pot accommodating portion 32. And a heat insulating material 33. The inner hook housing portion 32 is formed of a heat-resistant synthetic resin or the like.

  The through hole 11f formed in the ceiling plate 11e of the recess 11b has a substantially cylindrical shape, and is exposed to the inner hook 14 side through the bottom 32a of the inner hook accommodating part 32. A heat transfer plate 38 that closes the through hole 11f is attached to the through hole 11f.

  The heat transfer plate 38 is formed of an aluminum alloy or the like so as to have a concave shape in cross section, and the opening 11f1 is closed by being covered from the upper side of the through hole 11f. Further, the heat transfer plate 38 is crowned by a cylinder of the through hole 11f and is prevented from coming off by a flange portion 38a protruding outward in the radial direction. Further, a space is formed so that the heat transfer plate 38 can move in the vertical direction, and is biased toward the inner hook 14 by a spring (not shown).

  Further, the lower part of the through hole 11f (inlet side of the protruding part 21c) has a shape in which the diameter of the through hole 11f expands downward, so that the protruding part 21c can be easily guided into the through hole 11f. This makes it easy to place the rice cooking unit 10 on the heating unit 20.

  The inner hook housing portion 32 has a bottomed cylindrical shape, and the bottom portion 32a of the inner hook housing portion 32 is fixed to the inner surface (upper surface) of the ceiling plate 11e of the recess 11b. From the center of the bottom 32a in the radial direction, the upper surface of the heat transfer plate 38 protrudes toward the inner hook 14 side.

  The bottom part 14c of the inner hook 14 has a raised part 14d raised upward at the center part. The raised portion 14d has the highest central portion and is configured to be a gently curved surface outward in the radial direction. The heat transfer plate 38 is in contact with the lower surface of the central portion of the raised portion 14d. Thus, by providing the heat transfer plate 38 and closing the through hole 11f, it is possible to prevent the heat of the inner hook 14 from escaping downward through the through hole 11f.

  The heat insulating material 33 is composed of a vacuum heat insulating material and is configured to surround the entire periphery of the inner pot accommodating portion 32. Moreover, the heat insulating material 33 is configured, for example, by sandwiching glass fibers with metal foil and evacuating the inside. By applying such a heat insulating material 33, the rice cooker 1 can be reduced in weight and the portability at the time of carrying the rice cooking unit 10 can be improved. Moreover, by providing the heat insulating material 33, it becomes difficult for the heat | fever after rice cooking to escape outside, and heat retention performance can be improved. A vacuum vessel may be applied instead of the heat insulating material 33.

  The inner lid 12b has a pressure regulating valve 12b2 that restricts the discharge of the steam inside the inner hook 14 and keeps it at a predetermined pressure. The steam that has passed through the pressure regulating valve 12b2 passes through the steam passage 12b3 and is discharged to the outside of the rice cooker 1 through the steam port 12b4 provided in the lid body 12 (outer lid 12a).

  The operation switch 12c is rotatable in the W direction with the shaft 12f as a fulcrum, and an urging member 12f1 for urging the operation switch 12c in the W1 direction is provided. When opening the lid body 12, the upper surface of the operation switch 12c is pressed, and the operation switch 12c rotates in the direction W2 with the shaft 12f as a fulcrum, thereby unlocking the lid body 12. When the lid 12 is closed, the lid 12 is rotated in the W1 direction and locked to the main body 11 by pushing the lid 12 toward the main body 11.

  In addition, a magnet 16 for detecting the position of the rice cooking unit 10 is provided inside the main body 11. The magnet 16 is fixed to the inner wall surface at the rear end of the body portion 31.

  In the heating unit 21, a heating coil 27 is provided on the lower surface (inner surface) of the upper surface 21b of the convex portion 21a. For example, the heating coil 27 is formed in a planar ring shape by winding a litz wire. The heating coil 27 is placed on the coil holding unit 28.

  The temperature sensor 25 has a cylindrical shape, and a collar portion 25a is formed at an intermediate portion in the axial direction (vertical direction). A coil spring 39 is interposed between the collar portion 25a and the receiving portion 21g formed in the heating portion 21, and the urging force of the coil spring 39 causes the temperature sensor 25 to protrude upward (in a direction in which the temperature sensor 25 protrudes from the upper opening 21e). ).

  A control circuit 23 c is accommodated in the control circuit accommodating portion 23. The control circuit 23c includes an inverter control circuit that supplies power to the heating coil 27 on the substrate. Further, the control circuit 23 c controls the power supplied to the heating coil 27 according to the temperature information detected by the temperature sensor 25 and the control program.

  The control circuit 23c is provided with a detection unit 23d that detects the magnetism of the magnet 16 on the rice cooking unit 10 side. This detection part 23d is comprised with a Hall element, for example, and when the rice cooking unit 10 is mounted in the heating unit 20 in the state which the positioning recessed part 11g and the convex part 21d fit, it comes to oppose the magnet 16. FIG. ing. When the magnet 16 and the detection unit 23d face each other, it is detected by the control circuit 23c that the rice cooking unit 10 is placed at a predetermined position of the heating unit 20, and the rice cooker 1 is only in such a state. It comes to work.

  Further, by changing the strength and polarity of the magnet 16 and making the detection signal of the detection unit 23d different, the difference in the cooking unit 10 side is detected on the heating unit 20 side, and the program corresponding to the difference in the detection signal is operated. By making it possible, the rice cooker 1 having different specifications can be provided by sharing the heating unit 20.

  Further, the magnets 16 are installed at different positions. Similarly, a plurality of detection units 23d (reed switches) are arranged corresponding to the positions, and the detection unit 23d arranged at which position detects the magnet 16. It is also possible to change the specifications from

  In the heating unit 20, the space R1 in the control circuit housing portion 23 and the space R2 in the heating portion 21 communicate with each other to form a cooling air passage. A cooling fan 40 is disposed so as to span the space R1 and the space R2. When the cooling fan 40 is activated during rice cooking, the air sucked from the air inlet 29 (see FIG. 4) flows in the direction indicated by the white arrow, whereby the control circuit 23c and the heating coil 27 are cooled. Yes. The cooled air is discharged to the outside through an exhaust port (not shown) provided in the heating unit 20.

  In the present embodiment, the control circuit housing part 23 is not formed with a hole communicating with the space R1, so that a liquid such as water falls on the heating part 21 and the control circuit housing part 23 from above. Even if this occurs, there is no problem with the control circuit 23c. The upper surface opening 21e of the protrusion 21c is blocked from the space on the heating coil 27 side in the space of the heating unit 21.

  9 is a cross-sectional view taken along line II-II in FIG.

  As shown in FIG. 9, when the rice cooking unit 10 is placed on the heating unit 20, the convex portion 21 a of the heating unit 21 is fitted with the concave portion 11 b of the main body 11, so that the rice cooking unit 10 does not tilt and the heating unit Placed on. Moreover, the rice cooking unit 10 is supported by the heating unit 20 because the support part 11c around the recessed part 11b contacts the contact surface 21f around the convex part 21a. At this time, since the temperature sensor 25 is biased by the coil spring 39 so as to protrude from the upper surface opening 21e on the upper end side of the protrusion 21c, the upper surface of the temperature sensor 25 is brought into close contact with the lower surface of the heat transfer plate 38. Can do. Further, since the heat transfer plate 38 is in close contact with the inner pot 14, the temperature sensor 25 can accurately detect the temperature of the inner pot 14, in other words, the temperature of the rice.

  Moreover, since space S10 (refer FIG. 3) of the recessed part 11b of the main-body part 11 and the convex part 21a of the heating part 21 are formed in the substantially truncated cone shape, it becomes easy to insert the convex part 21a in the recessed part 11b, and rice cooking It becomes easy to place the unit 10 on the heating unit 20.

  FIG. 10 is a side view showing a state where the lid of the rice cooker is opened, and FIG. 11 is a plan view showing a state where the lid of the rice cooker is opened. 10 and 11 show the state when the lid is fully opened.

  As shown in FIG. 10 and FIG. 11, in the rice cooker 1, when the lid body 12 is fully opened, the lid body 12 is positioned more inwardly (on the inner pot 14 side) than the end 23 e of the control circuit housing portion 23. Is configured to do. In addition, when the lid 12 is fully opened, the rice cooker 1 has the end 12e (rear end, rear end) of the control circuit housing 23 in the side view shown in FIG. 10 and the plan view shown in FIG. It is inward from the outermost peripheral edge.

  As shown in FIG. 11, the outer peripheral surface 23 s (outermost part) of the control circuit housing portion 23 is a circular arc that protrudes backward, and the lid 12 has an outer peripheral surface 23 s even when the lid 12 is fully open. It falls within the range of the arc R10 including. Thereby, even if it arrange | positions so that the outer peripheral surface 23s and the wall surface M of the rice cooker 1 may contact | connect, the cover body 12 does not hit the wall surface M when the cover body 12 is opened.

  12 is a cross-sectional view taken along line III-III in FIG. In FIG. 12, the center of the inner hook 14 is indicated by O1, and the center of the heat insulating material 33 is indicated by O2.

  As shown in FIG. 12, the heat insulating material 33 is arranged in a circle around the inner hook 14. Further, the center O2 of the heat insulating material 33 is arranged eccentrically rearward with respect to the center O1 of the inner hook 14. That is, the distance S1 between the inner hook 14 and the heat insulating material 33 at the front end is the narrowest, the distance S2 between the inner hook 14 and the heat insulating material 33 at the rear end is the widest, and the distance gradually increases from the front end toward the rear end. ing. The reason why the rear side is wide in this way is that the hinge portion 12d is provided. Therefore, it is possible to reduce the outer shape of the rice cooking unit 10 by arranging the heat insulating material 33 eccentrically with respect to the inner pot 14 rather than arranging the heat insulating material 33 to the width of the rear side and arranging the whole at the interval S2. The rice cooker 1 can be downsized.

  By the way, in this embodiment, since the front gap of the inner hook 14 is narrowed by making it eccentric, and the lock member 12e is disposed at the front end, the heat insulating material 33 can be obtained simply by winding the heat insulating material 33 into a cylindrical shape. Interferes with the lock member 12e, and the heat insulating material 33 cannot be wound around the inner hook 14. Therefore, in this embodiment, as shown in FIG. 13, the corresponding corner portions of both ends of the heat insulating material 33 formed in a band shape are notched obliquely in advance, so that the heat insulating material 33 is bent into a cylindrical shape and the both ends are overlapped. A triangular notch 33a is formed. By winding the notch 33a in accordance with the position of the lock member 12e, the heat insulating material 33 can be wound around the inner hook 14 in a cylindrical shape (ring shape) without interfering with the lock member 12e.

  As described above, in the rice cooker 1 of the present embodiment, when the rice cooking unit 10 is placed on the heating unit 20 and the lid 12 is fully opened, the lid 12 is attached to the end 23e of the control circuit accommodating portion 23. It is located inward. According to this, even if it is a case where the rice cooker 1 is arrange | positioned in the place where the wall surface M is arrange | positioned behind the control circuit accommodating part 23, since the cover body 12 does not hit the wall surface M, the rice cooking unit 10 is. Misalignment can be prevented (see FIGS. 10 and 11).

  In this embodiment, since the control circuit 23c is provided not on the heating unit 21 side (below the heating coil 27) but in the control circuit housing unit 23 different from the heating unit 21, the height dimension H of the heating unit 21 is set. (Refer FIG. 5) can be suppressed low and the installation position of the rice cooking unit 10 can be made low. Thereby, when removing the rice cooking unit 10 from the heating unit 20, since it is not necessary to raise the rice cooking unit 10 high with respect to the heating unit 20, the handleability at the time of attaching or detaching the rice cooking unit 10 can be improved.

  Moreover, in this embodiment, by forming the curved surface 23a along the peripheral surface of the main body part 11 in the control circuit housing part 23, the control circuit housing part 23 is placed when the rice cooking unit 10 is placed on the heating unit 20. It can be made to function as a guide part, and it becomes easy to set rice cooking unit 10 to heating unit 20.

  Moreover, in this embodiment, the protrusion part 21c is formed in the upper surface 21b of the heating part 21, and the through-hole 11f in which the protrusion part 21c is inserted in the lower surface of the rice cooking unit 10 is formed. According to this, as shown in FIG. 14, even when another cooking utensil 100 such as a pan is placed on the heating unit 21 of the heating unit 20, the bottom surface 100 a of the cooking utensil 100 hits the protrusion 21 c, and the cooking utensil 100 cannot be stably placed on the heating unit 21. Moreover, it is understood that the cooking utensil 100 such as a pan cannot be placed by anyone who sees it visually. As a result, it is possible to abandon the user from putting another cooking utensil on and to prevent the heating unit 20 from being used in an inappropriate form of use.

  In the present embodiment, the rice cooking unit 10 is provided with a heat transfer plate 38 that closes the through hole 11f. According to this, since the cooling air by the cooling fan 40 that cools the heating coil 27 and the control circuit 23c can be prevented from flowing into the inner pot 14 by the heat transfer plate 38, in other words, the heating coil 38 27 and the control circuit 23c are closed spaces, so that the inner pot 14 can be prevented from being cooled by the cooling air.

  Moreover, in this embodiment, by providing the heat-transfer plate 38 which obstruct | occludes the through-hole 11f, when the rice cooking unit 10 is set | placed on the table T as shown in FIG. It can prevent flowing to the table T side through, and can prevent the table T from being exposed to high heat. For example, when a vinyl cloth is hung on the table T, inconveniences such as deformation of the vinyl cloth can be prevented.

  Moreover, in this embodiment, the temperature sensor 25 which detects the temperature of the inner pot 14 is provided in the heating unit 20, and this temperature sensor 25 is arrange | positioned at the projection part 21c. According to this, since the convex shape of the temperature sensor 25 and the convex shape of the projection part 21c can be put together in one place, the structure of the rice cooker 1 can be simplified.

  Moreover, in this embodiment, the magnet 16 is provided in the rice cooking unit 10, and the detection part 23d which detects the magnetism of the magnet 16 in the heating unit 20 is provided. According to this, when the rice cooking unit 10 is removed from the heating unit 20, the magnetism of the magnet 16 cannot be detected by the detection unit 23d, so that the rice cooking unit 10 is not placed on the heating unit 20. Can prevent the heating unit 20 (heating coil 27) from operating.

  By the way, since the ceiling board 11e of the recessed part 11b which opposes the upper surface 21b of the heating part 21 after rice cooking becomes high temperature, when the ceiling board 11e of the recessed part 11b contacts the table T directly, the table T will be exposed to high temperature. Therefore, in this embodiment, the table T is damaged. In this embodiment, by providing the concave portion 11b into which the heating unit 21 is inserted on the lower surface of the main body 11, the rice cooking unit 10 after rice cooking is provided as shown in FIG. Since a gap (space S10) can be formed between the table T and the ceiling plate 11e of the rice cooking unit 10 when placed on the table T, the high-temperature ceiling plate 11e does not directly contact the table T, and the table T is hot. Can be prevented from being exposed to heat. For example, when a vinyl cloth is hung on the table T, inconveniences such as deformation of the vinyl cloth can be prevented.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can implement with a various form. In the present embodiment, the case where the control circuit housing portion 23 is formed in a substantially square box shape has been described as an example. However, the lid body 12 does not hit the wall surface M when the lid body 12 is fully opened. If it is a structure, the structure provided in cyclic | annular form so that the surroundings of the rice cooking unit 10 may be enclosed may be sufficient, for example. In the present embodiment, the case where the upper surface 23b of the control circuit housing portion 23 is located above the upper surface 21b of the heating portion 21 has been described as an example. However, the control circuit 23c can be housed and the lid body 12 can be accommodated. If the configuration does not hit the wall surface M, the upper surface 23b of the control circuit housing part 23 may be located below the upper surface 23b of the heating part 21.

  Further, in the present embodiment, the case where the magnet 16 is arranged on the inner wall surface of the main body 11 and the detection unit 23d is arranged in the control circuit housing unit 23 has been described as an example, but as shown in FIG. The magnet 16 may be arranged on the bottom surface of the main body 11 and the detection unit 23d may be arranged on the upper surface of the inner wall of the heating unit 21, and can be changed as appropriate.

  Moreover, in this embodiment, although the rice cooker 1 provided with the heat exchanger plate 38 was mentioned as an example and demonstrated, the rice cooker which is not provided with the heat exchanger plate 38 may be sufficient.

  In addition, when the rice cooking unit 10 having a structure in which the through hole 11f can be freely moved up and down without urging the heat transfer plate 38 toward the inner pot 14 side is mounted on the heating unit 20, a protrusion provided on the heating unit 20 By pressing the heat transfer plate 38 against the bottom 14c side of the inner hook 14 by the temperature sensor 25 provided at the tip of the protrusion 21c and the 21c, the heat transfer plate 38 is urged toward the bottom 14c of the inner hook 14, The temperature sensor 25 urges the heat transfer plate 38 to detect the temperature of the inner pot 14. When the rice cooking unit 10 is removed from the heating unit 20, the heat transfer plate 38 is moved to the bottom 14 c side of the inner pot 14. The external force that presses against the heat is lost, and the heat transfer plate 38 moves downward (lowers) to move away from the bottom portion 14c of the inner pot 14, and an air layer is formed between the bottom portion 14c and the heat transfer plate 38. Heat transfer from 14 to heat transfer plate 38 To, it is possible to further improve the rice warmth of the inner hook 14.

  In addition, when the rice cooking unit 10 is removed from the heating unit 20 after rice cooking, as shown in FIG. 17, a display for alerting the user is turned on or blinking on the display unit 22 b of the operation panel 22. Also good. Further, the temperature of the heating unit 21 may be monitored, and the display may be turned off when the temperature falls below a predetermined temperature.

DESCRIPTION OF SYMBOLS 1 Rice cooker 10 Rice cooking unit 11 Main-body part 11b Recessed part 11f Through-hole (hole)
12 Lid 12a Outer lid 12b Inner lid 12d Hinge (rotating shaft)
13 Handle 14 Inner hook (pot)
16 Magnet 20 Heating unit 21 Heating part 21a Protruding part 21b Upper surface 21c Protruding part 22 Operation panel 23 Control circuit accommodating part 23c Control circuit 23d Detection part 23e End part (outermost part)
25 Temperature sensor 33 Heat insulating material 38 Heat transfer plate (heat transfer part)
40 Cooling fan

Claims (1)

A rice cooking unit comprising a main body for storing the inner pot and a lid for opening and closing the upper opening of the inner pot;
A heating unit having a heating unit for heating the inner pot and detachably supporting the rice cooking unit;
The rice cooking unit has a through-hole penetrating both the inner pot accommodating portion for accommodating the inner pot and the lower surface of the main body portion mounted on the heating portion, and closes the through hole so as to contact the lower surface of the inner pot. A heat transfer plate,
The heating unit is provided with a protrusion inserted into the through hole, and a temperature sensor that protrudes from the upper end side of the protrusion and measures the temperature of the inner pot,
When the rice cooking unit is placed on the heating unit of the heating unit, the temperature sensor contacts the heat transfer plate to detect the temperature of the inner pot.