JP2008264227A - Thermal-retention cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal-retention cooker in which a user is able to easily recognize a lack of a pot. <P>SOLUTION: The thermal-retention cooker is provided with the pot, a heating coil 7 as a heating means for heating the pot, an LCD (Liquid Crystal Display) 65 as a display for displaying time and a lack-of-pot sensing means 62 for sensing the lack of the pot. When the sensing means 62 senses the lack of the pot, it notify the lack of the pot to the user through the LCD 65 and an LED (Light-Emitting Diode) 66, a lamp, provided from it separately and flashed on/off. Then, the LCD 65 for primarily displaying time is used to notify the lack of the pot to the user. Meanwhile, separate LED 66 is turned on/off to make the user visually attracted and the user can easily recognize the lack of the pot. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a warming pot used indoors, for example.

  As this type of heat retaining pot, for example, Patent Document 1 discloses a main body and a pan that are separated from each other, and the presence or absence of a pan is detected by a panless detecting means.

Another Patent Document 2 discloses a heat retaining pot provided with an operation means.
JP 2000-296059 A JP 2006-204611 A

  In the above-described prior art, there is known a method for notifying the user of the absence of pan when the pan is not in the main body in the warming pot provided with the no pan detection means. However, the notification has a problem that the structure for realizing it is complicated and the cost is increased, and the notification has a problem that it is difficult for the user to know that the pan is not in the main body.

  Further, as a means for detecting the operation of the operation means, the position of the magnetic body is determined, and the distance of the magnetic body is changed with the operation of the operation means. However, in this case, it could not be detected unless there was a certain amount of movement of the magnetic material.

  In view of the above problems, an object of the present invention is to provide a warming pot that allows a user to easily understand the state without a pan.

  Another object of the present invention is to provide a heat retaining pot that can reliably detect the operation of the operating means with less distance movement.

  According to a first aspect of the present invention, there is provided a warming pot having a pan, an electromagnetic induction or electric heating means for heating the pan, and an indicator. While notifying, it is made to blink by the blinking means.

  According to a second aspect of the present invention, there is provided a heat retaining kettle comprising a lid, a lock means for holding the lid in a predetermined state, and an operating means. When the operating means is operated, the detecting means detects a change in position relative to the magnetic material. In the heat retaining pot that detects and releases the lock means, the magnetic body is installed at an angle with respect to the detection means.

  According to the first aspect of the invention, by using a display device for displaying a predetermined display, the user is informed of the absence of pan, and at the same time, another flashing means is also flashed to visually appeal. The user can easily understand the no pan state.

  According to the second aspect of the present invention, the detection means can reliably detect the operation of the operation means with a smaller distance movement of the magnetic body by only slightly operating the operation means.

  Hereinafter, preferred embodiments of a heat retaining pot according to the present invention will be described with reference to the accompanying drawings. In FIG. 1, which schematically shows the overall configuration, 1 is a main body, 2 is an outer frame that forms an outline of the main body 1, and a bottom plate 3 that covers the opening and forms a bottom outline of the main body 1 is formed at the bottom of the outer frame 2. Mated and fixed. Moreover, the bottomed cylindrical pot accommodating part 4 is arrange | positioned inside the outer frame 2, The pot 5 which accommodates to-be-cooked rice in this pot accommodating part 4 is mounted | worn detachably. A flange portion 6 extending outward in the horizontal direction is formed on the upper portion of the pan 5. By placing the lower surface of the flange portion 6 on the inner peripheral upper end portion of the outer frame 2, Inside, the pan 5 is accommodated in a suspended state.

  7 is a heating coil as a heating means provided outside the pan 5. The heating coil 7 is arranged on the outside of the pot housing portion 4 from the outer bottom surface portion of the pan 5 to the lower portion of the outer surface, and is joined to the outer surface of the pan 5 by supplying a predetermined high-frequency current to the heating coil 7. The heating element (not shown) made of the magnetic metal material is heated so that the pot 5 is heated by electromagnetic induction. A pan temperature sensor 8 serving as a pan temperature detecting means is provided in the center of the bottom of the pan accommodating portion 4. The pan temperature sensor 8 is in contact with the outer bottom surface of the pan 5 and detects the temperature of the pan 5. In addition, as a heating means instead of the electromagnetic induction type such as the heating coil 7, an electric heating type heating means such as a heating heater may be used.

  The main body 1 is provided with an inverter circuit for supplying a high-frequency current to the heating coil 7 and adjusting the heating output of the heating coil 7, a power supply voltage detection circuit (not shown) for detecting a power supply voltage, and the like. The unit 11 is mounted on the substrate 13. In addition, a control unit 15 is provided inside the main body 1 so as to face an operation panel 14 provided on the front surface of the main body 1, and a cord reel 16 corresponding to a power supply wire winding mechanism is provided at the rear of the main body 1. It is provided in the position.

  Reference numeral 21 denotes a lid corresponding to a lid that covers the main body 1 and thus the upper surface opening of the pan 5. The lid body 21 includes an outer lid 22 that forms the outer surface of the lid body 21, an outer lid cover 23 that forms a portion that is located at the lower outer periphery of the lid body 21 and does not face the upper surface opening of the pot 5, The lid lower surface member 24 that forms the lower surface of the body 21 (the lower surface of the lid body) and forms a portion facing the upper surface opening of the pan 5 is a main component. Further, an inner lid 25 that directly covers the upper surface opening of the pan 5 so as to cover the lid lower surface member 24 is detachably provided to the lid lower surface member 24. The lid 21 is pivotally supported by the main body 1 by a hinge portion 26 having a hinge spring provided at the rear of the main body 1. Further, a lid opening button 27 as an operation means is provided on the front side of the main body 1 on the side opposite to the hinge portion 26, and a clamp (not shown) connected to the lid opening button 27 is attached to the main body 1. By engaging the front portion, the lid 21 is closed with respect to the main body 1, and the lower outer peripheral surface of the inner lid 25 abuts the upper surface of the flange portion 6 of the pan 5, while the lid opening button 27 is pressed. When the moving operation is performed, the engagement between the lid 21 and the main body 1 is released, and the lid 21 is automatically opened by the biasing force of the hinge portion 26.

  Inside the lid 21, a lid heater 28 as a lid heating means for heating the lid lower surface member 24 or the inner lid 25 and the upper surface of the inner lid 25 are contacted to detect the temperature of the inner lid 25 and thus the lid 21. A lid temperature sensor 29 is provided as a lid temperature detecting means. The lid temperature sensor 29 may detect the temperature of the lid lower surface member 24 instead of the temperature of the inner lid 25. A steam port 31 for releasing the steam in the pan 5 to the outside is provided in a substantially central portion of the lid 21 so as to be detachable from the upper surface of the outer lid 22.

  Next, the opening / closing structure of the lid 21 and the main body 1 in this embodiment will be described in more detail with reference to FIGS. The lid 21 is provided with a clamp 34 corresponding to the engaging portion. The clamp 34 is pivotally supported with respect to the outer lid cover 25 around a clamp shaft 35 provided inside the lid 21. The lid opening button 27 for opening and closing the lid body 21 is disposed in an exposed state from the front upper surface of the lid body 21 so that the user can operate it. Clamp biasing means 36 such as a spring for biasing the base end portion 34A of the clamp 34 toward the lid opening button 27 is provided inside the lid body 21, so that a force that constantly pushes the lid opening button 27 upward is provided. It comes to work.

  In addition to the base end portion 34A that contacts the lid opening button 27, the clamp 34 penetrates through a clamping hole 37 on the lower surface of the outer lid cover 25 and protrudes downward, and the clamp 34 substantially It corresponds to the tip portion, and is configured by an engaging portion 34C extending from the lower end of the hanging portion 34B to the inside of the main body 1 from the starting point. The clamp 34 is formed of a metal part such as stainless steel, and the engaging portion 34C is substantially L-shaped. By doing so, compared with the case where the clamp 34 is made of a synthetic resin, the engagement with the clamp receiver 38 having a higher strength can be obtained. Further, when viewed from the front side of the heat insulating pot and the main body 1, engagement portions 34 </ b> C of the clamp 34 are provided at substantially equal positions on the left and right sides from the center. The hanging portion 34B and the engaging portion 34C are provided on the lower side of the clamp 34 and are provided in a pair on the left and right. A clamp shaft 35 serving as a rotation center of the clamp 34 is disposed along the upper end of the hanging portion 34B, and the engaging portion 34C swings substantially in the front-rear direction of the main body 1.

  On the other hand, a clamp receiver 38 corresponding to an engagement receiving portion is disposed in front of the upper frame 2 and is located on the substantially opposite side of the hinge portion 28 provided on the upper frame 2, and the lid 21 is attached to the main body. When closing to the side 1, the clamp 34 rotates about the clamp shaft 35 as a central axis by the biasing force of the clamp biasing means 36, and engages with the clamp receiver 38. It is designed to be kept closed. The clamp receiver 38 is formed of a metal part such as stainless steel. By doing so, compared with the case where the clamp receiver 38 is made of a synthetic resin, the engagement with the clamp 34 having a higher strength can be obtained. On the other hand, when the lid 21 is opened, the lid opening button 27 is pushed, the proximal end portion of the clamp 34 is pushed downward to rotate the clamp 34 in the reverse direction, and the engaging portion 44C is moved to the body 1. The engagement between the clamp 34 and the clamp receiver 38 is released by moving forward.

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

  Next, the configuration of detection means for detecting the displacement of the lid opening button 27 will be described. On the back (inside) side of the lid opening button 27, a substrate 43 on which an LED (not shown) and a hall element 42 are mounted is disposed. The Hall element 42 as a magnetic detection element is disposed to face the magnet 44 as a magnetic body provided on the outer lid 22 when the lid opening button 27 is not pressed. When the Hall element 42 is operated to push the lid opening button 27 to release the engagement between the clamp 34 and the clamp receiver 38, the Hall element 42 moves away from the magnet 44 to detect its operation and generate a detection signal. Output. That is, the Hall element 42 and the magnet 44 here are provided as detection means 45 that detects a change in the lid opening button 27. The magnet 44 of the present embodiment is provided on the lid 21 that pivotally supports the clamp 34, but is not limited as long as the original purpose is exhibited as the detection means 45.

  The substrate 43 is attached in a state surrounded by the substrate holder 47 and the substrate cover 48. The substrate holder 47 and the substrate cover 48 are preferably formed of a transparent member in order to transmit the LED mounted on the substrate 43 to the outside. Further, the above-described lid opening button 27 is attached and fixed to the outer surface of the substrate cover 48 at a position opposite to the side on which the substrate holder 47 is attached. Thereby, the lid opening button 27 and the substrate 43 are configured as an integral movable part assembly including the substrate holder 47 and the substrate cover 48, and the substrate 43 on which the Hall element 42 is mounted together with the pushing operation of the lid opening button 27. Will also move.

  51 is an inhibiting means for restricting the movement of the clamp 34. This inhibiting means 51 is composed of a solenoid 53 having a plunger 52 that can be moved in and out by electromagnetic force, and a frame 54 that can move together with the plunger 52. When the plunger 52 is in the retracted position as shown in FIGS. 2 and 3, a frame lock piece 55 is provided on one end side of the frame 54 so as to protrude facing the substrate holder 47. The frame 54 is originally located between the pan 5 and the steam port 31 and is used to open and close a pressure regulating valve (not shown) that adjusts the sealing degree of the lid 21, that is, the pressure in the pan 5, as necessary. Yes, when the plunger 52 is in the retracted position, the other end of the frame 54 is separated from the pressure regulating valve, and the pressure regulating valve closes between the pan 5 and the steam port 31. Conversely, the plunger 52 is shown in FIG. When in the advanced position as shown, the other end of the frame 54 presses the pressure regulating valve to open the space between the pan 5 and the steam port 31. Moreover, when the space between the pan 5 and the steam port 31 is closed by the pressure regulating valve and the inside of the pan 5 is sealed, for example, by heating the inside of the pan 5 with the heating coil 7 during rice cooking, the pressure exceeds the atmospheric pressure. The inside of the pan 5 can be pressurized and, for example, the inside of the pan 5 can be decompressed to a pressure lower than the atmospheric pressure by discharging the air in the pan 5 to the outside with a decompression pump (not shown) at the time of heat retention. The detailed description of the structure of the pressure adjusting unit including the pressure adjusting valve and the pressure reducing means including the pressure reducing pump will be omitted.

  Next, the control system will be described with reference to FIG. In the figure, 61 is a heating control means, which includes the temperature information from the pan temperature sensor 8 and the lid temperature sensor 29 and the hall element 42 provided on the lid opening button 27, and the pan 5 is the main body 1. In response to a detection signal from the no pan detection means 62 that detects whether or not the pan is mounted and an operation signal from the operation switch 63 provided on the operation panel 14, the bottom of the pan 5 is heated when cooking and keeping warm. The heating coil 7 and the lid heater 28 for heating the lid 21 are controlled respectively, and the solenoid 53 described above, the LCD 65 as a display provided on the operation panel 14, the lid opening button 27 and the operation panel 14 are provided. Each of the LEDs 66 as a lamp is controlled.

  The heating control means 61 of this embodiment mainly controls the temperature of the bottom of the pan 5 by controlling the heating coil 7 based on the temperature detected by the pan temperature sensor 8, and mainly based on the temperature detected by the lid temperature sensor 29. The lid heater 28 is controlled to control the temperature of the lid lower surface member 24 and thus the inner lid 25. The heating control means 61 includes, as a function on the control sequence of the program stored in its own storage means (not shown), a rice cooking control means 67 for cooking rice to be cooked in the pan 5 during rice cooking, Insulation control means 68 that keeps and heats the rice in the pan 5 to a predetermined temperature, and a command for starting reserved rice cooking from the operation switch 63, and the cooked rice in the pan 5 at a predetermined time stored in the storage means in advance Reserving rice cooking control means 70 for controlling the rice cooking control means 67 so as to cook the food is provided. The predetermined time can be changed as appropriate by operating, for example, the hour key or minute key of the operation switch 63.

  Reference numeral 72 denotes a heating coil driving means that incorporates a high-frequency inverter circuit that receives a control signal from the heating control means 61 and supplies a predetermined high-frequency current to the heating coil 7. Separately, on the output side of the heating control means 61, a lid heater driving means 73 for driving the lid heater 28 in response to a control signal from the heating control means 61, and a solenoid for turning on or off the solenoid 53 Driving means 75, LCD driving means 76 for driving LCD 65, and LED driving means 77 for driving LED 66 are provided. When cooking by the rice cooking control means 67 and at the time of heat retention by the heat retention control means 68, the heating coil 7 heats the bottom of the pot 5 by the temperature detection from the pot temperature sensor 8 and the lid temperature sensor 29, and the lid. The cover 29 is heated by the heater 29. Moreover, after the rice cooking by the rice cooking control means 67 is finished and the cooked food in the pan 5 is cooked as rice, it automatically shifts to the heat insulation by the heat insulation control means 68, and the temperature detected by the pan temperature sensor 8 is reached. Based on this, the rice is kept at a predetermined temperature (about 70 ° C. to 76 ° C.).

  Here, the display form of the LCD 65 will be described in detail with reference to FIGS. The LCD 65 is configured by combining four 7-segment display portions 65A arranged in parallel and a pair of upper and lower colon display portions 65B disposed between the second and third 7-segment display portions 65A. Usually, the time of the clock and the time of the reserved cooking are displayed using the 7-segment display portion 65A and the colon display portion 65B. As an example, FIG. 6 shows 12:34 on the LCD 65 (filled portion is lit).

  On the other hand, when, for example, when the operation switch 63 is operated, such as the rice cooking start key or the reserved rice cooking start key, the so-called panless state in which the pan 5 is not attached to the main body 1 is detected, The control means 61 outputs a display control signal for notifying that there is no pan to the LCD 65. FIGS. 7 to 10 show an example of such a panless notification. Here, only the 7-segment display unit 65A is used, and the display is repeated in the order of FIG. 7 → FIG. 8 → FIG. 9 → FIG. , Visually appeal that the pan 5 is not in the main body 1. At the same time, the heating control means 61 blinks the LED 66 and outputs a display control signal for notifying that there is no pan to the LED 66. The blinking of the LED 66 is, for example, lit in the state of FIG. 7 in conjunction with the display switching of the LCD 65, for example, and is turned off in the state of FIG. 8, turned on in the state of FIG. 9, and turned off in the state of FIG. Alternatively, each of the states shown in FIGS. 7 to 10 may be blinked one or more times. In addition to the display on the LCD 65, the LED 66 may be flashed independently and unlinked. In short, any display form can be used as long as the user can easily understand that there is no pan by notifying the LCD 65 and the LED 66.

  As a specific example of the panless detecting means 62, it is possible to detect whether or not the pan 5 is attached to the main body from the regenerative current level when the heating coil 7 is energized, for example. In this case, if the pan 5 serving as a load is attached to the main body 1, the regenerative current to the heating coil 7 becomes large, and if the pan 5 is not attached to the main body 1, the regenerative current to the heating coil 7 is small. It is possible to detect that there is no pan from the difference in the regenerative current level. In addition to such a method, for example, a mechanism switch that turns on / off when the pan 5 is attached or not may be used.

  As described above, in this embodiment, in the heat insulating pot provided with the pan 5, the heating coil 7 as a heating means for heating the pan 5, and the LCD 65 as a display for displaying the time, it is determined that there is no pan. When the absence detecting means 62 detects it, the LCD 65 notifies this, and the LED 66 as a blinking means provided separately from the LCD 65 blinks. In this way, the LCD 65 for displaying the time is originally used to notify the user of the no pan state, and at the same time, another LED 66 blinks and visually appeals, so that the user can easily enter the no pan state. I can understand.

  Next, an operation when the lid opening button 27 is pressed will be described. FIG. 11 shows the positional relationship between the Hall element 42 and the magnet 44 in this embodiment. In the figure, arrow A indicates the direction of magnetic flux (lines of magnetic force) generated from the magnet 44. In addition, the position of the Hall element 42 in a state where the lid opening button 27 is not pressed is indicated by a solid line, and the position of the Hall element 42 where the detection signal is switched from ON to OFF while pressing the lid opening button 27 is one point. It is indicated by a chain line.

  On the other hand, FIG. 12 shows the positional relationship between the Hall element 42 'in the conventional example and the magnet 44' attached to the outer lid 22 'of the lid 21'. In the figure, the position of the Hall element 42 'when the lid opening button (not shown here) is not pressed is indicated by a solid line, and the detection signal is switched from ON to OFF while pressing the lid opening button. The position of the Hall element 42 'is indicated by a one-dot chain line. It should be noted that 43 'is a substrate on which the Hall element 42' is mounted, and this is the same as in the conventional example in that these rotate around the clamp shaft 35 'as the lid opening button is pushed.

  As apparent from a comparison between FIG. 11 and FIG. 12, the positions of the Hall element 42 ′ and the magnet 44 ′ are conventionally determined in the direction in which the magnetic flux (line of magnetic force) generated from the magnet 44 ′ is the strongest. In this way, even if the lid opening button is slightly pushed, the Hall element 42 'is not switched off due to the influence of the magnetic flux from the magnet 44', and the Hall element 42 'is moved to the position shown by the one-dot chain line in FIG. If it does not move, the detection signal of the Hall element 42 'will not be switched from on to off. Therefore, in this case, the distance variation from the initial position where the lid opening button is not operated until the detection signal of the hall element 42 ′ is switched becomes large, and the hall element 42 is pressed even though the lid opening button is pressed. There is a possibility that 'cannot detect this.

  On the other hand, in the present embodiment, in a state where the lid opening button 27 is not pressed, the Hall element 42 is inclined with respect to the Hall element 42 so that the Hall element 42 is disposed at a position avoiding the direction in which the magnetic flux from the magnet 44 is maximized. The magnet 44 is installed at an angle. In this way, the Hall element 42 is not affected by the magnetic flux from the magnet 44 from the initial position where the lid open button 27 is not operated, and the Hall element 42 is not affected by the magnetic flux from the magnet 44. Switches from on to off. That is, in this case, the distance variation until the detection signal of the hall element 42 switches from on to off is reduced, and the hall element 42 can reliably detect the pushing operation of the lid opening button 27.

  During cooking, when the heating coil 7 is energized to heat the pot 5 and pressurize over the atmospheric pressure, or during the heat retention, the pot 5 is depressurized to less than atmospheric pressure by a decompression means (not shown). In order to do so, the solenoid 53 is energized (on), and the plunger 52 of the solenoid 53 and thus the frame 54 moves to the retracted position. Thereby, a pressure regulation valve block | closes between the pan 5 and the steam port 31, and the sealing in the pan 5 is ensured. In addition, since the frame lock piece 55 sinks below the base end portion 34A of the clamp 34, the rotation of the clamp 34 is restricted, and even if the lid opening button 27 is pushed, the clamp 34 and the clamp receiver 38 The engagement is locked and the lid 21 is prevented from opening. That is, the frame 54 here functions as a locking means for holding the lid 21 in the closed state.

  On the other hand, at the time of heat insulation, the heat insulation control means 68 receives a detection signal from the Hall element 42. That is, as shown in FIG. 2, when the user depresses the lid opening button 27 with the intention of opening the lid 21 in a state where the inside of the pan 5 is depressurized to less than atmospheric pressure, Although the base end 34A of 34 is in contact with the frame lock piece 55 and its rotation is restricted, the lid opening button 27 is pushed down slightly due to the elasticity of the clamp 34, and the Hall element 42 is slightly separated from the magnet 44. (Fig. 3). At this time, when the heat retention control means 68 receives that the detection signal from the hall element 42 has been switched from on to off, the solenoid 53 is turned off, the plunger 52 advances, the pressure regulating valve is pushed in, and the pan 5 And the steam port 31 is opened. At the same time, the rotation restriction of the frame lock piece 55 with respect to the clamp 34 is also released, and the lid 21 can be opened by releasing the engagement between the clamp 34 and the clamp receiver 38 by pressing the lid opening button 27 again. It will be possible (Fig. 4).

  As described above, in this embodiment, the lid body 21, the frame 54 as a lock means for holding the lid 21 in a closed state, and the lid opening button 27 as an operation means, the push-operating operation of the operation means. In this case, avoid the direction in which the magnetic flux from the magnet 44 is maximized in the heat retaining pot that releases the lock function of the frame 54 by the Hall element 42 that detects the position change with respect to the magnet 44 that is a magnetic body. The magnet 44 is installed at an angle with respect to the Hall element 42 so that the Hall element 42 is disposed at the predetermined position.

  In this way, the Hall element 42 can reliably detect the operation of the lid opening button 27 with a smaller distance movement of the magnet 44 by operating the lid opening button 27 a little. In other words, when the lid opening button 27 is not pressed, the Hall element 42 is arranged so that the magnetic flux generated from the magnet 44 is shifted from the strongest direction, and the Hall element 42 is detected by pushing the lid opening button 27 a little. The signal is switched. Therefore, the Hall element 42 can reliably detect the pushing of the lid opening button 27 with less distance movement.

  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. For example, the display form of the LCD 65 is not limited to that in the embodiment, and a display form that can be easily understood by other users can be adopted.

It is sectional drawing of the heat retention pot in one Example of this invention. FIG. 4 is an enlarged cross-sectional view of the main part in a state where the lid opening button is not pushed when the lid is closed. FIG. 5 is an enlarged cross-sectional view of the main part in a state where the lid opening button is pushed for the first time when the lid is closed. FIG. 6 is an enlarged cross-sectional view of the main part in a state where the lid opening button is pushed for the second time when the lid is closed. It is a block diagram which shows an electrical structure same as the above. It is a front view of LCD of the state which is performing a clock display same as the above. It is a front view of LCD of the state which is performing the absence notification of a pot same as the above. It is a front view of LCD of the state which is performing the absence notification of a pot same as the above. It is a front view of LCD of the state which is performing the absence notification of a pot same as the above. It is a front view of LCD of the state which is performing the absence notification of a pot same as the above. It is explanatory drawing which shows the positional relationship of the magnetic flux from a magnet and a Hall element same as the above. It is explanatory drawing which shows the positional relationship of the conventional magnet and Hall element.

Explanation of symbols

5 Pan 7 Heating coil (heating means)
21 Lid (lid)
27 Lid opening button (operation means)
42 Hall element (detection means)
44 Magnet (magnetic material)
54 Frame (locking means)
65 LCD (display)
66 LED (flashing means)

Claims (2)

In a heat insulating pot equipped with a pan, an electromagnetic induction type or electric heating type heating means for heating the pan, and an indicator,
A warming pot having a configuration in which the indicator is informed that there is no pan and is blinked by blinking means.   A lid, a lock unit that holds the lid in a predetermined state, and an operation unit, and when the operation unit is operated, the detection unit detects a change in position with respect to the magnetic material, and releases the lock unit. A heat retaining pot, wherein the magnetic body is installed at an angle with respect to the detection means.