Conditioner

Abstract

To suppress fusion of a temperature fuse caused by a user's way of using.SOLUTION: A cooker 10 includes: a housing part 24; a heating plate 25 which incorporates a heater 26 heating a pot 15 and forms an open hole 25d going from a heating surface 25a to an outer surface 25b; a metallic movable member 32 which is arranged inside the open hole 25d so as to allow movements between a retracted position retracted by contacting the pot 15 and an advanced position advanced by taking the pot 15 out; and a temperature fuse 36 arranged so as to transmit heat via the movable member 32. A projection part 32c has a projection 32e which projects to the outer surface 25b from a part of surroundings of the open hole 25d, contacts the outer surface 25b when the movable member 32 is at the advanced position, and does not contact the outer surface 25b when the movable member 32 is at the retracted position.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cooking appliance. [Background technology]

[0002] Patent Document 1 discloses a rice cooker that uses a heating plate with a built-in heater. The heating plate is provided with a through hole that communicates with the inside of the container, and a temperature sensor that detects the temperature of the pot is arranged in this through hole so that it can move forward and backward. The temperature sensor is covered by a metal sensor cover. To stop the temperature sensor at a set advanced position, the sensor cover is provided with a flange (stopper) that protrudes in a disk shape. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-252632 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of cooking appliance, such as rice cookers and multi-cookers, a non-resettable thermal fuse may be placed together with the temperature sensor to prevent overheating of the pot (abnormal temperature rise of the heater) due to some abnormality such as a failure of the temperature sensor. Like the temperature sensor, heat is transmitted to the thermal fuse through the sensor cover.

[0005] However, the thermal fuse may melt depending on the user's usage. For example, in the case of a multi-cooker, the pot may be removed immediately after cooking is finished, or during cooking when the user determines that the cooking has reached the desired level. When the pot is removed, the sensor cover moves to the advanced position and the flange comes into contact with the heating plate, and the heat from the heating plate is transferred through the sensor cover to the thermal fuse, causing it to melt. A similar problem may occur in the case of a rice cooker. Patent Document 1 does not take into consideration the melting of the thermal fuse caused by such user usage.

[0006] An object of the present invention is to provide a cooking appliance that can prevent a thermal fuse from melting due to the way the user uses the appliance. [Means for solving the problem]

[0007] One aspect of the present invention provides a cooking utensil comprising: a storage section in which a pot is detachably stored; a heating surface against which the pot stored in the storage section abuts; and an outer surface opposite to the heating surface, the heating plate constituting the bottom of the storage section, the heating plate having a built-in heater for heating the pot and a through hole formed therein that runs from the heating surface to the outer surface; a metallic movable member arranged in the through hole so as to be able to move between a retracted position where it is retracted when the pot abuts against it and an advanced position where it is advanced when the pot is removed, the movable member having a protrusion that is located outside the outer surface of the heating plate in both the retracted position and the advanced position; and a temperature fuse arranged so that heat is transferred via the movable member, wherein one of the outer surface of the heating plate and the protrusion of the movable member protrudes from a portion around the through hole toward the other of the outer surface of the heating plate and the protrusion of the movable member, the protrusion abutting the other when the movable member is in the advanced position and not abutting the other when the movable member is in the retracted position.

[0008] A protrusion protruding from a part around the through hole is provided on one of the outer surface of the heating plate and the protrusion of the movable member, and when the movable member is in the advanced position, the protrusion abuts against the other of the outer surface and the protrusion. This reduces the contact area between the heating plate and the movable member compared to when a flat flange abuts against the heating plate, and therefore reduces the amount of heat transferred to the thermal fuse via the movable member. This prevents the thermal fuse from melting due to the user's usage, such as removing the pot immediately after cooking is finished or during cooking.

[0009] The movable member has an outer shape larger than the shape of the hole wall of the through hole and has a flange portion protruding from the protrusion of the movable member along the outer surface of the heating plate, and the protrusion portion consists of a plurality of convex stripes provided on the flange portion so as to extend radially from the protrusion portion.

[0010] The protrusion consisting of the ridges can be reliably molded integrally with a part of the metal flange by pressing, etc. In addition, since the protrusions are ridges extending radially from the protruding portion, the contact state of the protrusions with the heating plate can be stabilized even if the movable member moves in a direction intersecting the axis of the through hole.

[0011] The cooking apparatus includes a control unit that controls the heater to perform cooking, and an alarm unit that notifies the user when cooking is complete. When cooking is complete, the control unit stops heating by the heater and then operates the alarm unit after a specified time has elapsed.

[0012] When cooking is finished, the control unit stops the heating by the heater and then operates the alarm unit after a specified time has elapsed. In other words, since the alarm unit is operated after the temperature of the heating plate is lowered by stopping the heater, it is possible to prevent the temperature fuse from melting due to residual heat of the heating plate when the pan is removed immediately after cooking is finished.

[0013] The device comprises a holder arranged to be able to move forward and backward through the through hole of the heating plate, and a temperature sensor arranged in the holder for detecting the temperature of the pot, the temperature fuse being arranged in the holder, and the movable member being a sensor cover that covers the holder so as to be interposed between the pot and the holder.

[0014] The movable member is a sensor cover that covers a holder in which the temperature sensor is placed, and the temperature fuse is also placed in the holder, which simplifies the structure of the cooker and minimizes the increase in the number of parts and costs that accompany the use of a temperature fuse. Effect of the Invention

[0015] In the cooking appliance of the present invention, it is possible to prevent the thermal fuse from melting due to the way the appliance is used by the user. [Brief description of the drawings]

[0016] [Figure 1] 1 is a partially cutaway cross-sectional view of a multi-cooker, which is an example of a cooking appliance according to an embodiment of the present invention. [Diagram 2] Block diagram of the multicooker in Figure 1. [Diagram 3] FIG. 4 is an exploded perspective view of the container, the heating plate, and the sensor unit. [Figure 4] FIG. 4 is an exploded perspective view showing the outer surface side of the heating plate and the sensor cover. [Diagram 5] FIG. 2 is an enlarged cross-sectional view of part V in FIG. 1 . [Figure 6] 5, but with the pan removed. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] 1 shows a multi-cooker 10, which is an example of a cooking device according to an embodiment of the present invention. The multi-cooker 10 is a direct heating type that includes a main body 20 that houses a pot 15 and a lid 40 that is attached to the main body 20 so as to be able to open and close, and heats the pot 15 with a heating plate 25 that has a built-in heater 26. The multi-cooker 10 of this embodiment further includes a temperature fuse 36 for preventing overheating of the pot 15 due to some abnormality, and prevents the temperature fuse 36 from melting due to the way the user uses the pot.

[0019] First, an overview of the multi-cooker 10 will be described.

[0020] 1, pot 15 is made of metal and has a circular bottom 15a and a cylindrical outer periphery 15b that is continuous with the outer periphery of bottom 15a. However, pot 15 may have a polygonal shape in a plan view, as long as it is a bottomed cylindrical shape that is open at the upper end.

[0021] Main body 20 comprises an exterior body consisting of a cylindrical trunk 21 with a bottom, a bottom body 22 that further covers the bottom of trunk 21, and a shoulder body 23 attached to the upper end opening of trunk 21. An opening (not shown) is provided approximately in the center of shoulder body 23, and a storage section 24 that detachably stores pot 15 is attached to this opening. At the bottom of storage section 24, the above-mentioned heating plate 25 and sensor unit 30 for detecting the temperature of pot 15 are arranged. In this embodiment, the above-mentioned temperature fuse 36 is attached to sensor unit 30.

[0022] Lid 40 is rotatably attached to a hinge receiver (not shown) formed on the back of main body 20 (shoulder 23). Lid 40 has an inner lid (not shown) that seals the top opening of pot 15 in an openable manner. Lid 40 also has a steam passage (not shown) that connects the inside of pot 15 to the outside, allowing steam generated in pot 15 during cooking to flow out of multi-cooker 10.

[0023] Continuing to refer to Fig. 1, a board holder 42 is disposed on the rear of the main body 20, and a circuit board 43 is attached to this board holder 42. A control unit 45 (see Fig. 2) is mounted on the circuit board 43. The control unit 45 is composed of one or more microcomputers and other electronic devices.

[0024] 2, the heater 26, the temperature sensor 35, the display unit 46, the input unit 47, and the piezoelectric buzzer 48 are electrically connected to the control unit 45. Of these, the heater 26 is electrically connected to the control unit 45 via the thermal fuse 36. The display unit 46 is provided on the cover body 40 shown in FIG. 1 and is configured by, for example, a liquid crystal panel. The input unit 47 is provided on the cover body 40 shown in FIG. 1 and is configured by a plurality of switches. The piezoelectric buzzer 48 is mounted on the circuit board 43 shown in FIG. 1 and is an alarm unit that outputs an alarm sound.

[0025] When cooking conditions such as heating time and heating temperature are input (set) by operating multiple switches constituting input unit 47, control unit 45 displays the input status on display unit 46. Furthermore, when the cooking switch is operated, control unit 45 starts supplying electricity to heater 26, and controls the rate of electricity supply to heater 26 based on the temperature detected by temperature sensor 35 in accordance with the set cooking conditions. When cooking is completed, control unit 45 causes piezoelectric buzzer 48 to output an alarm sound notifying the completion of cooking.

[0026] The configurations of the container 24, the heating plate 25, and the sensor unit 30 will be specifically described below.

[0027] 1 and 3, storage section 24 is made of metal (aluminum) and is cylindrical with a bottom, with heating plate 25 attached to the bottom. The shape of storage section 24 in a plan view from the direction in which the axis extends corresponds to the shape of pot 15 in a plan view, and is annular in this embodiment. However, storage section 24 may also be cylindrical with open top and bottom, in which case the lower end (bottom) of storage section 24 is closed by heating plate 25.

[0028] A mounting portion 24a for mounting the heating plate 25 is recessed downward at the bottom of the housing portion 24. A through-hole 24b for mounting the sensor unit 30 is provided at the center of the bottom surface of the mounting portion 24a. In addition, a through-hole 24c for passing the connection terminal 26a of the heater 26 is provided around the through-hole 24b on the bottom surface of the mounting portion 24a.

[0029] 1 and 4, the heating plate 25 is made of aluminum with good thermal conductivity, and has two generally annular heaters 26 built in by casting. Each heater 26 has a pair of connection terminals 26a electrically connected to the circuit board 43. In the assembled state, the connection terminals 26a pass through the through-hole 24c of the housing portion 24 shown in FIG. 3 and protrude downward from the housing portion 24.

[0030] 1 and 3, heating plate 25 is attached to mounting portion 24a of storage portion 24 and constitutes the bottom of storage portion 24. Heating plate 25 has an upper heating surface 25a that contacts (abuts) bottom portion 15a of pot 15 stored in storage portion 24, and a lower outer surface 25b opposite heating surface 25a. Outer surface 25b does not contact pot 15 to be heated and does not directly transfer heat to pot 15, but is heated by heater 26 in the same way as heating surface 25a.

[0031] Heating surface 25a is curved with a predetermined curvature and protrudes upward in accordance with the shape of bottom 15a of pot 15. Referring to Fig. 4, outer surface 25b has projections and recesses formed by casting heater 26. Outer surface 25b is provided with boss 25c that protrudes downward, on the side opposite heating surface 25a. Heating plate 25 is attached to housing 24 so as not to move, by fastening a screw (not shown) that penetrates mounting portion 24a to boss 25c.

[0032] 4 and 5, the heating plate 25 is formed with a through hole 25d penetrating from the heating surface 25a to the outer surface 25b. In this embodiment, the through hole 25d is provided in the center of the heating plate 25, and its axis A coincides with the axis of the storage section 24. An annular rib 25e protruding along the axis A is provided on the hole edge of the through hole 25d on the outer surface 25b side. In this embodiment, the through hole 25d has a circular cross section, but may have a polygonal cross section.

[0033] 3, sensor unit 30 includes a holder 31, a sensor cover 32, a base member 33, a biasing member 34, and a temperature sensor 35. In this embodiment, sensor unit 30 is integrally equipped with a temperature fuse 36 as an overheat protection device that prevents pot 15 from overheating.

[0034] 5 and 6, holder 31 is arranged so as to be able to advance and retreat within through-hole 25d of heating plate 25. Holder 31 is movable between a retracted position (see FIG. 5) where it is retracted by pot 15 abutting against it via sensor cover 32, and an advanced position (see FIG. 6) where it is advanced by removing pot 15, and is urged to the advanced position by urging member 34 supported by base member 33.

[0035] 7, the holder 31 is made of resin and has a cylindrical shape with an outer shape smaller than the shape of the wall of the through hole 25d. The shape of the holder 31 as viewed in the direction of the axis is circular in this embodiment, but may be polygonal. The axial dimension of the holder 31 is larger than the axial dimension of the through hole 25d. The holder 31 has a protruding portion 31a located outside the outer surface 25b of the heating plate 25 (lower side in FIGS. 5 and 6) in both the retreated position shown in FIG. 5 and the advanced position shown in FIG. 6. The protruding portion 31a is provided with a plurality of ribs 31b spaced apart in the circumferential direction. The ribs 31b function as stoppers to prevent the urging member 34 from falling off.

[0036] Continuing to refer to Fig. 7, three mounting sections 31c to 31e are provided on the upper end of the heating plate 25 protruding from the heating surface 25a in the advanced position shown in Fig. 6. These mounting sections 31c to 31e are defined by forming two partition plates in a downwardly recessed recess. A thermal fuse 36 is disposed in the central mounting section 31c, a thermal sensor 35 is disposed in the mounting section 31d on one side, and an earth wiring (not shown) is disposed in the mounting section 31e on the other side as necessary. However, the positions of the thermal fuse 36 and the thermal sensor 35 relative to the mounting sections 31c to 31e can be changed as necessary.

[0037] 3 and 5, sensor cover 32 is a movable member made of metal (aluminum) that covers holder 31 so as to be interposed between pot 15 and holder 31. This sensor cover 32 is movable integrally with holder 31 between a retracted position shown in Fig. 5 and an advanced position shown in Fig. 6. Sensor cover 32 is formed by pressing a metal plate, and includes a cylindrical portion 32a and a flange portion 32d that protrudes from cylindrical portion 32a.

[0038] 4 and 5, the cylindrical portion 32a is cylindrical with an outer surface having an outer shape smaller than the shape of the hole wall of the through-hole 25d and an inner surface having the same shape as the outer shape of the holder 31. The sensor cover 32 is integrally assembled to the holder 31 by press-fitting the cylindrical portion 32a into the arrangement portions 31c to 31e of the holder 31.

[0039] The upper end of cylindrical portion 32a is closed by end plate portion 32b which covers arrangement portions 31c to 31e of holder 31. End plate portion 32b abuts against pot 15 in the retracted position shown in Fig. 5 due to the biasing force of biasing member 34, and protrudes from heating surface 25a of heating plate 25 in the advanced position shown in Fig. 6. When in the retracted position shown in Fig. 5, end plate portion 32b comes into contact with pot 15, so that heat from pot 15 is transferred to sensor cover 32.

[0040] The axial dimension of the cylindrical portion 32a is larger than the axial dimension of the through hole 25d including the rib 25e, and has a protruding portion 32c located outside (lower in Figs. 5 and 6) the outer surface 25b (rib 25e) of the heating plate 25 not only when the cylindrical portion 32a is in the retreated position shown in Fig. 5 but also when the cylindrical portion 32a is in the advanced position shown in Fig. 6. When the sensor cover 32 is attached to the holder 31, the lower end of the protruding portion 32c is located above the rib 31b of the holder 31.

[0041] 4 and 5, the flange 32d has an outer shape larger than the shape of the wall of the through-hole 25d of the heating plate 25, and protrudes from the protruding portion 32c so as to follow the outer surface 25b of the heating plate 25, more specifically, the lower end surface of the rib 25e of the heating plate 25. The upper end of the biasing member 34 abuts against the flange 32d. The biasing member 34 biases the flange 32d upward, thereby biasing the sensor cover 32 toward the advanced position, and the holder 31 from the retracted position can be moved integrally with the sensor cover 32 to the advanced position.

[0042] A protrusion 32e protruding toward the outer surface 25b of the heating plate 25 is provided in a circumferential portion of the flange 32d, i.e., in a portion around the through hole 25d of the flange 32d. The protrusion 32e is a convex ridge that bulges upward from the flange 32d and extends radially outward from the protrusion 32c, and a plurality of protrusions (three in this embodiment) are provided radially at intervals in the circumferential direction. When the sensor cover 32 is in the advanced position shown in FIG. 6, the protrusion 32e abuts against the rib 31b of the heating plate 25, and the heat of the heating plate 25 is transferred to the sensor cover 32. When the sensor cover 32 is in the retreated position shown in FIG. 5, the protrusion 32e moves downward away from the rib 31b, and the heat of the heating plate 25 is not transferred to the sensor cover 32.

[0043] Here, if the contact area of ​​the rib 25e and the flange 32d is 1 (100%) when the rib 25e and the protrusion 32e are not provided and the flat portion of the outer surface 25b of the heating plate 25 perpendicular to the axis A is in contact with the flange 32d, the contact area of ​​the rib 25e and the flange 32d is 53%. The total contact area of ​​the rib 25e and the multiple protrusions 32e is preferably 28% or less, and is 3% in this embodiment. The protrusions 32e may be in contact with the flat surface of the outer surface 25b of the heating plate 25 without providing the rib 25e, but even in this case, the total contact area of ​​the protrusions 32e is preferably 28% or less.

[0044] If the total contact area of ​​the protrusion 32e is made too large, the amount of heat of the heating plate 25 transferred to the thermal fuse 36 via the sensor cover 32 increases, so that if the user removes the pot 15 during cooking or removes the pot 15 immediately after cooking is finished, the thermal fuse 36 is likely to melt. For this reason, assuming that the contact area when the outer surface 25b of the heating plate 25 and the flange 32d are in surface contact is 1 (100%), it is preferable that the total contact area of ​​the protrusion 32e with the rib 25e or the outer surface 25b is set to 28% or less. There is basically no lower limit to the total contact area of ​​the protrusion 32e, and it is preferable that it is as small as possible within a range that can withstand impact due to contact with the heating plate 25.

[0045] 5 and 7, a protruding piece 32f is provided at the lower end of the flange 32d, i.e., on the side of the flange 32d opposite to the direction in which the protrusion 32e protrudes. The protruding piece 32f is generally triangular when viewed from the direction in which the axis of the cylindrical portion 32a extends, and extends along the outer side surface 25b of the heating plate 25. A rectangular guide hole 32g is provided near the three apexes of the protruding piece 32f.

[0046] 3 and 5, base member 33 is made of metal and is arranged on the opposite side to pot 15 accommodated in storage section 24 with a gap therebetween. Specifically, base member 33 is arranged on the underside of mounting section 24a and is attached to storage section 24 by screws so as not to move. Referring to Figures 5 and 7, base member 33 is provided with positioning groove 33a that is recessed downward to form a semicircular cross section and that positions the lower end of biasing member 34.

[0047] The base member 33 is formed with a guide piece 33b extending in the movement direction of the sensor cover 32. The guide piece 33b is provided by cutting and raising, and when assembled to the housing portion 24, the guide piece 33b passes through the guide hole 32g, thereby allowing the sensor cover 32 to move in the forward and backward directions and restricting the sensor cover 32 from rotating about its axis. The dimension from the lower end to the upper end of the guide piece 33b is a length that allows the guide piece 33b to remain in a state of passing through the guide hole 32g in both the retracted position shown in FIG. 5 and the advanced position shown in FIG. 6. The guide hole 32g may be provided in the base member 33, and the guide piece 33b may be provided in the sensor cover 32.

[0048] 5 and 7, the biasing member 34 is made of a coil spring whose diameter gradually decreases from the lower end (one end) to the upper end (the other end). The large-diameter end of the biasing member 34 is supported by the positioning groove 33a of the base member 33, and the small-diameter end of the biasing member 34 is supported by the flange portion 32d of the sensor cover 32.

[0049] Temperature sensor 35 is disposed in placement portion 31d of holder 31, and comes into contact with end plate portion 32b when sensor cover 32 is attached to holder 31. Temperature sensor 35 detects the temperature through sensor cover 32 and outputs the detection result to control unit 45. Specifically, temperature sensor 35 detects the temperature of pot 15 in the retracted position shown in Fig. 5, and detects the temperature of heating plate 25 in the advanced position shown in Fig. 6.

[0050] Based on the detection result input from the temperature sensor 35, the control unit 45 judges whether or not the pot 15 is accommodated in the accommodation unit 24 at the beginning of cooking. If it is determined that the pot 15 is accommodated, cooking continues, whereas if it is determined that the pot 15 is not accommodated, cooking is stopped. Specifically, in the case of the pot-present state shown in FIG. 5, the temperature of the pot 15 is input from the temperature sensor 35 via the sensor cover 32, and in the case of the pot-absent state shown in FIG. 6, the temperature of the heating plate 25 is input from the temperature sensor 35 via the sensor cover 32. In the case of the pot-absent state, the temperature rise gradient is larger than in the case of the pot-present state in which the food is accommodated. Thus, the control unit 45 can judge the presence or absence of the pot 15 by comparing the temperature rise per unit time with a preset threshold value, and can prevent heating (boiling without food) when the pot 15 is not accommodated.

[0051] 5 and 7, thermal fuse 36 is an overheat protection device for preventing overheating of pot 15 (abnormal temperature rise of heater 26) due to some abnormality such as a failure of temperature sensor 35. Thermal fuse 36 is placed in placement portion 31d of holder 31, and abuts against end plate portion 32b when sensor cover 32 is attached to holder 31. Heat from pot 15 is transferred to thermal fuse 36 via sensor cover 32. Referring to FIG. 2, thermal fuse 36 is interposed in a conductive path connecting control portion 45 and heater 26, and melts when a heat amount equivalent to, for example, 140 degrees is applied. Thermal fuse 36 is not self-recoverable, and control portion 45 cannot pass electricity to heater 26 after melting.

[0052] If pot 15 becomes overheated due to some abnormality during normal use, thermal fuse 36 melts to prevent further overheating. Also, when the user removes pot 15 during cooking, heat from heating plate 25 is transferred to thermal fuse 36 via sensor cover 32, which has advanced to the advanced position. However, in this embodiment, protrusion 32e reduces the contact area between sensor cover 32 and heating plate 25, thereby reducing the amount of heat transferred to sensor cover 32, thereby preventing thermal fuse 36 from melting.

[0053] Furthermore, control unit 45 of this embodiment is equipped with a cooking flow that can prevent thermal fuse 36 from melting under normal use conditions. Specifically, when cooking is completed, control unit 45 stops heating by heater 26 and then operates piezoelectric buzzer 48 to output an alarm sound after a predetermined standby time T has elapsed. Here, the completion of cooking means that the heating time of pot 15 by heater 26, that is, the heating time set by the user or the heating time set in advance in the automatic cooking mode, has elapsed.

[0054] Even if heating by the heater 26 is stopped, the temperature of the heating plate 25 immediately after the heater 26 is turned off is high due to heat storage, and it takes some time for the temperature to start decreasing due to heat dissipation. Therefore, the above-mentioned waiting time T is preferably set to be equal to or longer than the time until the temperature of the heating plate 25 starts to decrease, and is set to 7 minutes in this embodiment.

[0055] In this way, the notification that cooking is finished is made after the standby time T has elapsed, when the temperature of the heating plate 25 begins to decrease after the power to the heater 26 is cut off, so that the melting of the temperature fuse 36 due to the residual heat of the heating plate 25 can also be prevented.

[0056] The multi-cooker 10 configured as above has the following features.

[0057] A protrusion 32e protruding from a part around the through hole 25d is provided on the protruding portion 32c of the sensor cover 32, and when the sensor cover 32 is in the advanced position, the protrusion 32e abuts against the outer surface 25b (rib 25e) of the heating plate 25. This reduces the contact area between the heating plate 25 and the sensor cover 32 compared to when the flat flange portion 32d abuts (surface contacts) against the heating plate 25. This reduces the amount of heat transferred to the thermal fuse 36 via the sensor cover 32. This prevents the thermal fuse 36 from melting due to the user's usage, such as removing the pot 15 immediately after cooking is finished or during cooking.

[0058] The protrusion 32e consisting of a ridge can be reliably molded integrally with a part of the metal flange 32d by pressing or the like. In addition, since the protrusion 32e is a ridge extending radially from the protruding portion 32c, the contact state of the protrusion 32e with the heating plate 25 can be stabilized even if the sensor cover 32 moves in a direction intersecting the axis A of the through hole 25d.

[0059] When cooking is completed, control unit 45 stops heating by heater 26 and then activates piezoelectric buzzer 48 after a predetermined time T has elapsed. In other words, since piezoelectric buzzer 48 is activated after heater 26 is stopped to reduce the temperature of heating plate 25, it is possible to prevent temperature fuse 36 from melting due to residual heat of heating plate 25 when pot 15 is removed immediately after cooking is completed.

[0060] The movable member is a sensor cover 32 that covers a holder 31 in which a temperature sensor 35 is disposed, and a temperature fuse 36 is also disposed in the holder 31. This simplifies the configuration of the multi-cooker 10, and minimizes the increase in the number of parts and the cost associated with using the temperature fuse 36.

[0061] The present invention is not limited to the configurations of the above-described embodiments, and various modifications are possible.

[0062] For example, in the above embodiment, the temperature fuse 36 is integrally assembled to the sensor unit 30, but the temperature fuse 36 may be attached separately from the temperature sensor 35. In other words, a metallic movable member similar to the above-mentioned sensor cover 32 may be arranged in the housing portion 24 so as to be able to advance and retreat, and the temperature fuse 36 may be arranged on the movable member so that heat is transferred via this movable member.

[0063] The protrusion 32e is not limited to a configuration protruding from the flange 32d, and may be provided so as to protrude directly from the protrusion 32c. The protrusion 32e is not limited to a convex strip extending in the radial direction, and may be a protrusion protruding in a cylindrical or hemispherical shape along the axis A of the through hole 25d. The protrusion 32e may be provided on the outer surface 25b of the heating plate 25.

[0064] The control unit 45 may immediately activate the piezoelectric buzzer 48 after cooking is completed. The notification unit is not limited to the piezoelectric buzzer 48 that outputs a notification sound, and may be the display unit 46 that displays characters, marks, or the like.

[0065] The sensor unit 30 including the through hole 25d and the thermal fuse 36 may be disposed on the side of the storage section 24. In other words, the heating plate 25 may be formed in a saucer shape so as to cover the lower part of the outer periphery 15b of the storage section 24, and the sensor unit 30 including the through hole 25d and the thermal fuse 36 may be disposed in the lower region of the outer periphery 15b of the storage section 24.

[0066] The cooking appliance is not limited to the multi-cooker 10, and may be a rice cooker for cooking rice. In this case, it is possible to prevent the temperature fuse 36 from melting due to the user's usage, such as removing the pot to add ingredients while cooking seasoned rice. [Explanation of symbols]

[0067] 10 Multi-cooker (cooking device) 15. Pot 15a bottom 15b Outer periphery 20 Main unit 21 Torso 22 Bottom body 23 Shoulder body 24 Storage unit 24a Mounting part 24b Penetration 24c Penetration 25 Heating plate 25a heating surface 25b External surface 25c Boss 25d through hole 25e Rib 26 Heater 26a Connection terminal 30 Sensor unit 31 Holder 31a Protrusion 31b Rib 31c~31e Placement section 32 Sensor cover (movable part) 32a Cylinder part 32b End plate part 32c protrusion 32d Tsubabe 32e protrusion 32f Projection part 32g Guide hole 33 Base material 33a Positioning groove 33b Guide piece 34 Pressing member 35 Temperature Sensor 36 Thermal fuse 40 Lid 42 PCB holder 43 Circuit Board 45 Control section 46 Display section 47 Input section 48 Piezoelectric Buzzer

Claims

1. A storage section in which a pot is detachably stored; a heating plate that constitutes the bottom of the storage section and has a heating surface against which the pot stored in the storage section comes into contact and an outer surface opposite to the heating surface, the heating plate having a built-in heater for heating the pot and a through hole formed therein that penetrates from the heating surface to the outer surface; a metallic movable member disposed within the through hole so as to be capable of moving between a retreated position where it is retreated when the pot comes into contact with the through hole and an advanced position where it is advanced when the pot is removed, the movable member having a protrusion that is positioned outside the outer surface of the heating plate in both the retreated position and the advanced position; a thermal fuse arranged so that heat is transferred through the movable member; Equipped with one of the outer surface of the heating plate and the protruding portion of the movable member has a protrusion that protrudes from a part around the through hole toward the other of the outer surface of the heating plate and the protruding portion of the movable member, and abuts against the other when the movable member is in the advanced position, and does not abut against the other when the movable member is in the retreated position. Cooker.

2. A storage section in which a pot is detachably stored, a heating plate that constitutes the bottom of the storage section and has a heating surface against which the pot stored in the storage section comes into contact and an outer surface opposite to the heating surface, the heating plate having a built-in heater for heating the pot and a through hole formed therein that penetrates from the heating surface to the outer surface; a metallic movable member disposed within the through hole so as to be capable of moving between a retreated position where it is retreated when the pot comes into contact with the through hole and an advanced position where it is advanced when the pot is removed, the movable member having a protrusion that is positioned outside the outer surface of the heating plate in both the retreated position and the advanced position; a thermal fuse arranged so that heat is transferred through the movable member; Equipped with the movable member has an outer shape larger than a shape of a hole wall of the through hole, and has a flange portion that protrudes from the protruding portion of the movable member along the outer surface of the heating plate, the flange portion is provided with a plurality of protrusions protruding from the flange portion toward the outer surface of the heating plate and extending radially from the protrusions along the outer surface of the heating plate, the protrusions contacting the outer surface of the heating plate when the movable member is in the advanced position and not contacting the outer surface of the heating plate when the movable member is in the retreated position. Cooker.

3. A control unit that controls the heater to perform cooking; An alarm that notifies you when cooking is finished Equipped with When cooking is completed, the control unit stops heating by the heater and then operates the notification unit after a predetermined time has elapsed. A cooking device according to claim 1 or 2.

4. A holder is disposed in the through hole of the heating plate so as to be movable forward and backward; a temperature sensor disposed in the holder for detecting a temperature of the pan; Equipped with The thermal fuse is disposed in the holder, The movable member is a sensor cover that covers the holder so as to be interposed between the pot and the holder. A cooking device according to any one of claims 1 to 3.

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