JP6299479B2 - Electric rice cooker - Google Patents

Description

  The invention of this application relates to an electric rice cooker having a human detection function for detecting the presence of a person and controlling the rice cooker in a desired state based on the detection result.

  In recent electric rice cookers, in addition to ordinary white rice rice cooking, for example, brown rice and miscellaneous rice cooking, rice cooking functions such as rice cooking, rice bran, rice crackers, etc. Even those with functions such as adjustment, finishing level adjustment, voice guide, cooking, and washing the inner pot are provided.

  In such an electric rice cooker equipped with many functions, the number of operation switches in the operation panel part for performing operation settings of these functions is also large, and a display panel part for displaying information necessary for those operations Is also large (see, for example, the configuration of an electric rice cooker disclosed in Patent Document 1).

  In the case of such an electric rice cooker, of course, when the AC power supply is connected to the power circuit in the main body and the operation standby state is waiting for the operation setting, the microcomputer and the operation panel side operation board Since it is necessary to keep the various switch circuits in the activated state and the display panel driving circuit such as the liquid crystal on the display panel side in the driving state, the predetermined power is always consumed and the standby time If becomes longer, it consumes more power as it gets longer.

  In order to solve such problems, recently, a real-time clock function (RTC function) has been added to the microcomputer control unit, and if a necessary operation setting action is not performed for a predetermined time or longer, it is automatically It has been proposed to reduce power consumption by shifting to an energy saving mode in which the power supply of peripheral circuits is saved (or turned off). And in the case of an electric rice cooker adopting such an energy saving mode, to return to the normal standby state where the operation setting can be made from the energy saving mode, press the dedicated energy saving mode release switch, or any operation setting Generally, this is done by pressing a switch.

JP 2013-244107 A

  Certainly, when the dedicated operation switch or any one of the operation setting switches is pressed to cancel the energy saving mode, it is possible to return to the normal standby state in which the operation setting can be reliably performed. However, in that case, at least one extra switch operation is necessary in the sense that the switch must be turned on, and in the case of a dedicated operation switch, some users forget to press it and the necessary operation It is easy to cause misunderstanding that the setting is not possible and product trouble.

  In order to solve such a problem, for example, the electric rice cooker itself has a function of detecting and judging the presence of a person, and whether or not to set the energy saving state depending on whether or not there is a person, etc. It is preferable that control states such as an energized state and an operating state of the rice cooker can be controlled to a desired state.

  The invention of this application was made in order to meet such a demand. A human sensor for detecting the presence of a person is provided in the electric rice cooker main body, and the electric rice cooker main body is desired based on the detection result. An object of the present invention is to provide an electric rice cooker that is controlled to the above state.

In order to achieve the above object, the present invention comprises the following problem solving means.
(1) Problem Solving Means of the Invention of Claim 1 An electric rice cooker according to the present invention includes an inner pot, a rice cooker main body that stores the inner pot so as to be removable, and the rice cooker main body that is stored therein. comprising a bobbin case heating means for heating the inner pot, a lid provided to be opened and closed on the top of the cooker body and a motion sensor for detecting the presence of a person, according to a detection result of the human sensor Te, an electric rice cooker ing so as to control the rice cooker main body to a predetermined state, the motion sensor may be in front of the lid, offset to the left or right one side And it is provided in the position which does not correspond to the front-back direction with respect to the steam port provided in the rear part side of the above-mentioned lid .

  In this way, the electric rice cooker body is provided with a human sensor having a function of detecting the presence of a person, and depending on the detection result of the human sensor, the energized state, the operating state, etc. of the rice cooker main body are in a predetermined state. If it controls to this, the said electric rice cooker can be used in the state with high energy-saving property as efficiently as possible.

  That is, in the case of the same configuration, for example, when the user is not in an operation corresponding position of the electric rice cooker, the operation unit and the display unit of the lid are set in an energy saving state to reduce power consumption. Regardless of whether it is in standby mode, non-standby mode, or other rice cooker operation status, at least when the user is not near the electric rice cooker, the lid operation unit and display unit are set to energy saving mode Thus, power consumption can be reduced as much as possible.

  On the other hand, for example, when the user is at a position corresponding to the operation of the electric rice cooker, the operation unit and the display unit of the lid are set in an operable state to enable operation and display. be able to.

Moreover, in the problem solving means of the present invention, in such a case, the human sensor is located at the front part of the lid, is displaced to either the left or right side, and is provided on the rear side of the lid. It is characterized by being provided at a position that does not correspond to the steam port in the front-rear direction.

The operation unit and the display unit in the front part of the lid body have a certain width in the left-right direction, and are configured by arranging a plurality of operation switches in parallel. The plurality of operation switches and display units are provided with illumination means for generating light such as LEDs. Therefore, it is better that a human sensor that detects the presence of a person by infrared rays avoids a space between the operation unit and the display unit having these light sources.

Further, generally, a steam port that blows out steam containing "Onenba" during rice cooking is provided in the central portion on the rear side of the lid, and infrared rays that cause the human sensor to react from the steam blown out from the steam port Is emitted.

Therefore, in order to avoid the reaction between the operation unit and the display unit having the light source and not react with the steam from the steam port, the human sensor is provided at the front portion of the lid body far from the steam port. Therefore, it is displaced to either the left or right side, avoiding the space between the operation unit and the display unit, and offset to a position not corresponding to the front-rear direction with respect to the steam port provided on the rear side of the lid. ing.
(2) SUMMARY OF THE SUMMARY This invention of claim 2 is the structure of the SUMMARY of the invention described in claim 1, the human sensor is provided in correspondence with the lower portion of the operation portion It is characterized by having.

  The presence of a human sensor to detect the presence of a person is basically to detect an action of a user trying to operate an operation unit while looking at a display unit provided at the front part of the lid. Therefore, when the human sensor is provided in the rice cooker body, the most effective place is the front part of the lid, and the position corresponding to the lower part of the operation part is suitable.

That is, the position corresponding to the lower part of the operation part at the front part of the lid is such that the face part is positioned above the human sensor from the user's shoulder in the normal operation state in the state closest to the human sensor. Therefore, it is possible for the human sensor to detect the presence of the user and the state to be operated most accurately and reliably.
(3) Problem solving means of the invention of claim 3 The problem solving means of the invention is the structure of the problem solving means of the invention of claim 1 or 2, wherein the human sensor is a pyroelectric sensor, The sensor unit includes a plurality of pyroelectric electrodes having a predetermined length parallel to each other, and the plurality of pyroelectric electrodes are disposed so as to have a predetermined crossing angle with respect to the movement of the person to be detected. It is characterized by being.

When a pyroelectric sensor equipped with a plurality of pyroelectric electrodes having a predetermined length parallel to the sensor part is used as a human sensor that detects the presence of a person such as a user corresponding to an electric rice cooker There are the following problems.

That is, the pyroelectric sensor includes a plurality of pyroelectric electrodes having a predetermined length parallel to each other in the sensor portion, and based on infrared light incident on each of the pyroelectric electrodes, A distance to a light source such as a human body is detected, and a human motion (motion) is detected from a change in the difference between the detected distances within a predetermined time.

For this reason, it has a high detection sensitivity for a light source that moves in a direction crossing a plurality of pyroelectric electrodes parallel to each other with a predetermined time difference, while a plurality of pyroelectric electrodes arranged in parallel are arranged in a parallel direction. It does not have high sensitivity to light sources that move simultaneously without time difference.

Therefore, when these pyroelectric electrodes are installed so as to be parallel to the movement in the front-rear direction of the person to be detected, the user who approaches the electric rice cooker from the front direction or moves away from the front direction. It is difficult to detect. On the other hand, when a plurality of pyroelectric electrodes are installed so as to be parallel to the movement of the person from left to right or from right to left, the electric rice cooker approaches from the front to the back, Alternatively, it is easy to detect a user who is away, but it is difficult to detect movement from left to right and from right to left.

Therefore, in the configuration of the present invention, the plurality of pyroelectric electrodes provided in parallel with each other are moved in any direction from the front to the back, from the back to the front, from left to right, and from right to left. In addition, the light source portion such as the human body always has a predetermined crossing angle with respect to any movement in the front-rear direction and the left-right direction by arranging it so as to correspond with a predetermined crossing angle. So that the difference in the detection distance and the time difference necessary for seeing the change in the difference in the detection distance are secured.

According to such a configuration, it becomes possible to reliably detect the movement of the user in the front-rear direction and the movement in the left-right direction with respect to the human sensor using the pyroelectric sensor. The human detection function is greatly improved.

  As a result of the above, according to the invention of this application, the presence of a user corresponding to the electric rice cooker body can be automatically detected by the human detection function of the electric rice cooker realized using the human sensor, If the user needs an electric rice cooker, the electric rice cooker will be energized, but if not, make sure to switch to the energy saving mode and realize the energy saving function, etc. to use the electric rice cooker extremely efficiently Moreover, since they are reliably performed in an automatic state that does not require any operation, the energy saving performance can be improved more effectively as well as convenient.

It is a top view which shows the structure of the rice cooker main body upper part of the electric rice cooker which concerns on embodiment of invention of this application in the energy-saving mode setting state (state in which operation of the operation panel part, a display, illumination, etc. are impossible). . It is a top view which shows the structure of the rice cooker main body upper part of the electric rice cooker which concerns on embodiment of invention of this application in the energy-saving mode cancellation | release state (state in which operation of an operation panel, a display, illumination, etc. are possible). It is sectional drawing in the AA line cutting | disconnection part of FIG. 1 which shows the structure inside the rice cooker main body of the electric rice cooker which concerns on embodiment of invention of this application. It is an expanded sectional view of the left half part (front part except a cover) of Drawing 3 which shows the composition inside the rice cooker main part of the electric rice cooker concerning the embodiment of the invention of this application. Upper and lower sides showing configurations of shoulder members, shoulder heater frames, shoulder heater covers, sliding seal packings, and metal plates in the rice cooker body shoulder of the rice cooker body of the electric rice cooker according to the embodiment of the invention of this application It is a disassembled perspective view. The outer pot of the rice cooker body of the electric rice cooker according to the embodiment of the invention of this application, the second protective frame unit (upper), the first protective frame unit (lower), the magnetic shielding plate, the first and second It is an up-and-down exploded perspective view showing composition of each part of a work coil, a ferrite core, and a coil stand. It is sectional drawing in the BB line cutting | disconnection part of FIG. 1 which shows the installation state of the human sensor in the cover body part of the rice cooker main body of the electric rice cooker which concerns on embodiment of invention of this application. It is sectional drawing in the CC line | wire cutting part of FIG. 1 which shows the installation state of the human sensor in the cover body part of the rice cooker main body of the electric rice cooker which concerns on embodiment of invention of this application. It is a partially notched front view which shows the structure of the sensor main-body part and light-receiving lens part of the human sensitive sensor in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this application. It is a front view which shows the structure of the sensor main-body part of the human sensitive sensor in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention. FIG. It is a top view which shows the structure of the sensor main-body part of the human sensitive sensor in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention. It is a block diagram which shows the structure of the light-receiving part and output circuit of a human sensitive sensor in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention. It is a top view of the whole microcomputer board which shows the installation state of the human sensitive sensor on the microcomputer board in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention. It is an enlarged plan view of the microcomputer board corner part which shows the installation state of the human sensor on the microcomputer board in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention. It is a top view of the whole microcomputer board which shows the installation state of the human sensor on the microcomputer board in the rice cooker main-body part of the electric rice cooker which concerns on other form 1 of embodiment of invention of this application. It is a top view of the whole microcomputer board which shows the installation state of the human sensitive sensor on the microcomputer board in the rice cooker main-body part of the electric rice cooker which concerns on other form 2 of embodiment of invention of this application. It is explanatory drawing which shows the characteristic (mechanism) of the human detection effect | action by the several pyroelectric element of the human sensitive sensor of the electric rice cooker which concerns on embodiment of invention of this application. It is a sensor output signal waveform figure which shows the characteristic of the person detection effect | action by the several pyroelectric element of the human sensitive sensor of the electric rice cooker which concerns on embodiment of this invention. It is a top view of the whole microcomputer board which shows the structure of the human sensitive sensor installation part on the microcomputer board in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this application invention. It is a top view of the whole microcomputer board which shows the structure of the human sensitive sensor installation part on the microcomputer board in the rice cooker main-body part of the electric rice cooker which concerns on the other form 3 of embodiment of invention of this application. It is a perspective view which shows the installation state of the inclination sensor on the battery board | substrate in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention. It is a figure which shows the inside and electrical structure of the inclination sensor in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of invention of this application. It is an explanatory side view which shows the relationship between the opening-and-closing state of the cover body in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this application, and the inclination angle detection state of an inclination sensor. It is a block diagram which shows the relationship between the human sensor and inclination sensor in the rice cooker main-body part of the electric rice cooker which concerns on embodiment of this invention, and the control function of a microcomputer control unit.

  Embodiments for carrying out the invention of this application will be described below in detail with reference to the accompanying drawings of FIGS.

  First, in FIGS. 1-8, the structure of the main part relevant to the rice cooker main-body part and the main body of the electric rice cooker which concerns on embodiment of invention of this application is shown, and FIGS. The configuration of the human sensor used in the rice cooker body part of the electric rice cooker and the installation state on the substrate are also used in the rice cooker body part of the electric rice cooker in FIGS. FIG. 24 shows a system configuration of a microcomputer control unit using a human sensor and a tilt sensor, respectively.

<About the structure of the electric rice cooker body>
In the electric rice cooker according to the embodiment of the invention of this application, as a structural feature, the operation switch portion of the operation panel is configured by a touch panel, and the operation switch portion is illuminated by an LED from below. It has a human sensor that detects the presence of the user and an energy-saving mode, and at least the user can operate it regardless of whether it is in standby mode, non-standby mode, or other rice cooker operating status. If it is not within the specified corresponding area, etc., it is possible by controlling to the energy saving mode and turning off the operation function and lighting function of the operation switch in addition to the display function and lighting function of the liquid crystal panel. As far as power consumption is reduced.

  First, a rice cooker body in an electric rice cooker according to an embodiment of the invention of this application has a bottomed cylindrical inner pot 3 made of a ceramic material that contains rice and water, as shown in FIGS. (For example, a ceramic inner pot such as a clay pot), a bottomed cylindrical outer pot 6 made of the same ceramic material covering the bottom 3a to the side 3c of the inner pot 3, and the outer pot 6 on the bottom side. And a protective frame (inner case) 4 forming an inner hook storage groove 5 for arbitrarily storing and setting the inner hook 3 via the outer hook 6, and a protective frame for receiving and holding the protective frame 4 The main body case 1 is provided with a housing space, and a lid 2 is provided on the rear end side of the opening 5a of the inner hook housing groove 5 of the main body case 1 and opens and closes the opening 5a.

  The main body case 1 is composed of a synthetic resin side-side cylindrical outer case 1a and a synthetic resin bottom-side dish-shaped bottom case 1b. A synthetic resin, which will be described later, is placed inside the upper end of the outer case 1a. A shoulder member 8 made of resin is provided, and the protective frame 4 forming the inner hook housing groove 5 is connected and supported via the shoulder member 8. An edge 84 having an inverted U-shaped outer peripheral side cross section of the shoulder member 8 is engaged with the entire circumferential direction so as to be engaged with the engaging edge 10 having a bowl-shaped cross section on the upper end side of the outer case 1a. Yes.

  The protective frame 4 is composed of two upper and lower housing members, each of which is a synthetic resin molded first and second separate protective frame unit (lower unit) 4A and second protective frame unit (upper unit) 4B. The second protective frame unit 4B constituting the upper housing is laminated on the upper part of the first protective frame unit 4A constituting the lower housing, and is integrally formed.

  First, the first protective frame unit 4A constituting the lower housing includes a bottom portion 41a formed of a flat circular surface having a predetermined radius, and a predetermined height upward while gradually increasing the diameter from the outer periphery of the bottom portion 41a. A bent portion 41b extending in the direction of the curved portion 41b, a stepped portion 41c having a curved cross section formed on the upper edge of the bent portion 41b in a radially outward direction, and rising substantially vertically from the outer peripheral portion of the stepped portion 41c. The support wall 41d is formed with a cylindrical wall having a predetermined height. And this 1st protection frame unit 4A part is supported by the lower side coil stand 9 which mentions the bottom part 41a and the curved part 41b part later.

  Next, the second protective frame unit 4B constituting the upper housing is centered on a cylindrical wall 42b having a U-shaped cross section that is open outward in the radial direction, with a lower end on the lower side. A mounting portion 42a on the support wall 41d of the first protective frame unit 4A is provided, and a hook-like engagement step portion 42d that is enlarged outward in the predetermined radial direction is provided on the upper end side thereof. . An upper portion (substantially upper half portion) partitioned by the rib 42c on the outer peripheral surface of the cylindrical wall 42b of the second protective frame unit 42B is an installation surface (coiled surface) of a third work coil C3 described later. And a third work coil C3 wound in two layers inside and outside is installed on the work coil installation surface.

  It should be noted that the installation surface of the third work coil C3 is not the entire vertical width of the cylindrical wall 42b, but, for example, the upper half portion, so that the lower first protective frame unit 4A is even a little. This is because the distance to the second work coil C2 on the side is enlarged to avoid mutual induced interference.

  The first and second protective frame units 4A and 4B are stacked and integrated vertically as shown in FIGS. 3 and 4, so that the protective frame 4 formed as a whole with a bottomed cylindrical body structure can be obtained. On the bottom upper surface side (the upper surface side of the bottom portion 41a and the curved portion 41b of the first protective frame unit 4A), the bottom portion 6a and the curved portion 6b of the outer pot 6 made of the ceramic material are partially disposed in the radial direction. The upper portion of the ceramic outer pot 6 is pasted with a predetermined heat-insulating air layer maintained on a portion having a predetermined thickness and an adhesive portion (not shown) and without adhesive. For example, as shown in FIG. 4, the first and second induction heating elements G1 and G2 made of silver paste or silver spray are provided on each of a circular flat bottom 3a and a curved portion 3b on the rounded surface. The same circular bottom 3a of the inner pot 3 and its Flexure 3b on the rounded surface of the outer periphery is adapted to be accommodated while maintaining a predetermined clearance S.

  Then, in the same storage state, for example, as shown in FIGS. 3 and 4, the upper end of the side portion 6 c extends long up to the upper portion of the side portion 3 c of the inner hook 3. The outer hook 6 sufficiently covers the bottom 3 a of the inner hook 3 to the vicinity of the side 3 c.

  By the way, the outer hook 6 of this embodiment has a bowl-like structure as a whole, and the center of the flat circular bottom 6a corresponds to the center sensor fitting hole 10a at the center of the first protective frame unit 4A. A sensor part insertion hole 6e of the center sensor is provided, and the sensor part at the upper part of the center sensor CS fitted in the center sensor insertion hole 10a is inserted in a loosely fitting state so that it can be moved up and down. On the radially outer peripheral side, a hill for fitting high pedestal support members 61, 61,... Made of a heat-resistant elastic member such as silicon rubber for supporting the high pedestal 3e of the inner hook 3 at a predetermined interval in the circumferential direction. Portion supporting member fitting holes 6f, 6f... Are provided. Further, from a heat-resistant elastic member such as silicon rubber that supports the outer periphery of the bent portion 3b of the inner hook 3 at a predetermined interval in the circumferential direction at a portion near the outer periphery of the bent portion 6b at the upper outer peripheral side. Centering support member fitting holes 6g, 6g,... For fitting the centering support members 62, 62,.

  In each of the fitting holes 6f, 6f, 6g, 6g,..., High base support members 61, 61,..., Centering support members 62,. .. Are respectively fitted and fixed to support the bottom portion 3a and the bent portion 3b of the inner hook 3, but the hill portion supporting members 61, 61,... Are provided on the lower first protective frame unit 4A. Are supported in a stable fixed state between the pocket portions P, P,... And the upper portion 3e portion of the outer periphery of the bottom portion 3a of the inner hook 3 is placed in a state where it abuts downward from above, as will be described later. When the protective frame 4 and the outer hook 6 that are elastically supported so as to be movable up and down via the floating support mechanism are lowered according to the weight of the inner hook 3, the outer peripheral side flange portion F of the opening 3d of the inner hook 3 is moved. On the inner edge 82 portion of the shoulder member 8 to be described later The inner hook 3 is hooked uniformly over the entire circumferential direction through the heat-resistant support member, and the protective frame 4 side first and second work coils C1, C2 and the first The second induction heat generating portions G1 and G2 are opposed to each other through an appropriate positional gap and through an appropriate induction gap, and an appropriate predetermined gap (heat storage / convection space) is formed between the outer induction heat sink 6 and the outer pot 6. ) Supported with S maintained.

  At the same time, the opposing position and the corresponding distance between the third induction heat generating portion G3 on the inner peripheral surface of the side portion 6c of the outer hook 6 and the side portion 6c portion of the inner hook 3 that are induction-heated by the third work coil C3. Is also maintained at an appropriate design position and design distance.

  On the other hand, the centering support members 62, 62,... On the outer peripheral side of the bent portion not only support the inner hook 3 in the protective frame 4 in an appropriate positional relationship via the outer hook 6 after being stored, The outer periphery of the bent portion 3b of the inner hook 3 stored at the time is guided in the entire periphery so as to be stored in an accurate positional relationship, and the centering function is properly performed.

  Further, the protruding dimensions of the hill support members 61, 61... And the centering support members 62, 62... To the inner side of the outer hook 6 are such that the inner hook 3 is properly fitted in the protective frame 4 as described above. 3 and 4 that are stored and set in a positional relationship, the dimensions are set so as to form an appropriate gap S between the outer peripheral surface of the inner hook 3 and the inner peripheral surface of the outer hook 6.

  As a result, in the storage state of the inner hook 3 shown in FIGS. 3 and 4, the bottom portion 3a and the bent portion 3b of the inner hook 3 are heated by the heat generated by the first and second induction heating portions G1 and G2. The side portion 3c where the temperature is locally high and the heat at the same time is gradually conducted from the bottom portion 3a and the bent portion 3b side to the upper side portion 3c through the inside of the wall, and no induction heating portion is provided. The temperature on the side also increases gradually.

  Further, in the above configuration, in addition to this, the ceramic outer hook 6 is also provided inside the protective frame 4 in which the inner hook 3 is accommodated, and the first and second induction heating portions G1 and G2 are connected to each other. The outer periphery of the inner pot 3 is covered with the outer pot 6 made of ceramic, so that the bottom 3a of the inner pot 3 and the induction heating parts G1 and G2 of the bent part 3b and the vicinity of the induction heating parts G1 and G2 are outward. The heat radiated to the outer pot 6 is cut off by the outer pot 6 made of the same ceramic, and the radiant heat radiated outward from the induction heating section G1 of the bottom 3a of the inner pot 3, the induction heating section G2 of the bent section 3b, and the vicinity thereof. Heats the inner hook 3 itself in such a way as to envelop the outer periphery of the inner pot 3, and the same heat is stored in the opposing surface portion between the outer hook 6 and the inner hook 3 and the gap S between them. The hot air heated in the state is Bottom 3a of the inner hook 3 through S, increases from the outer peripheral surface side of the curved portion 3b on the outer peripheral surface of the side portion 3c, the whole of the inner hook 3 the outer peripheral surface heating, so heated.

  As a result, the inner hook 3 reaches a relatively high temperature from the bottom 3a and the bent portion 3b side to the entire side portion 3c, and effectively stores the amount of heat. Therefore, the amount of heat generated in the first and second induction heat generating portions G1 and G2 can be used effectively.

  Furthermore, in the case of the configuration of this embodiment, in that case, a third induction heat generating portion G3 is provided on the inner peripheral surface of the side portion of the outer hook 6 and corresponds to the third induction heat generating portion G3. A third work coil C3, which is electromagnetic induction means for inductively generating heat from the third induction heat generating part G3, is provided on the outer periphery of the side wall of the protective frame 4, and the side part 6c of the outer hook 6 is Heating is performed from the inner peripheral surface side.

  Accordingly, the ceramic outer hook 6 not only simply covers the outer periphery of the bottom 3a side of the inner hook 3 so as not to release heat, but also heats itself to a high temperature. Radiation heat from the hook 6 actively heats the inner inner pot 3 at a close distance with a slight gap S, and the inner pot 3 is not only on the bottom side but also on the side that has been underheated conventionally. The whole including 3c is effectively heated and heated. In this case, since the distance between the third work coil C3 and the third induction heating part G3 is short, the induction efficiency of the third induction heating part by the third work coil C3 is high, and noise is hardly generated.

  Moreover, the heating of the side portion 3c portion of the inner hook 3 is different from the case where the induction heating portion is directly provided in the side portion 3c portion of the inner hook 3, for example, and is heated at a predetermined distance from the outer pot 6 side. Since the inner hook 3 is heated by the radiant heat from the entire side portion 6c of the outer pot 6, the heating state becomes uniform, and the side portion of the inner pot 3 is heated. There is no possibility of causing scorching due to local heating as in the case of heating by directly providing an induction heating part in 3c and the like.

  In addition, in the case of this embodiment, the side portion 6c of the outer hook 6 is highly extended to the vicinity of the upper portion of the side portion 3c of the inner hook 3, and is located on the inner peripheral surface of the side portion 6c extended to be high. The third induction heat generating part G3 is provided, and a third work coil C3 for inductively generating heat by the third induction heat generating part G3 is provided on the outer periphery of the side wall of the protective frame 4 corresponding to the third induction heat generating part G3. Is provided.

  Therefore, in the ceramic outer hook 6, the inner peripheral surface of the side portion 6c extended to a position corresponding to the upper portion of the side portion 3c of the inner hook 3 is efficiently heated to become a high temperature. The upper portion of the side portion 3c of the inner pot 3 which has been underheated is also effectively heated, and the entire inner pot 3 including the side portion 3c and the upper portion thereof is effectively heated and heated. Thus, the space portion of the upper part of the rice in the inner pot 3 is maintained at a high temperature state (near 120 ° C.) similar to the case of rice cake.

  In this case, the upper position of the side portion 3c of the inner pot 3 where the side portion 6c of the outer pot 6 where the third induction heat generating portion G3 is provided is determined, for example, from the rated rice cooking capacity of the electric rice cooker. It corresponds to the upper position vicinity (position above the position of the water at the time of water absorption) of the rice after completion of cooking. When doing so, it is possible to appropriately apply a sufficient and sufficient amount of heat similar to the case of rice cake to the cooked rice and its upper space position after completion of cooking determined from the rated rice cooking capacity of the electric rice cooker. Thus, it becomes possible to cook more delicious rice without causing uneven cooking without causing burning.

<About floating support structure of protective frame>
As described above, the protective frame 4 in this embodiment is configured by vertically integrating the first and second protective frame units 4A and 4B. The first protective frame unit 4a includes, for example, It is floatingly supported on the above-mentioned bottom case 1b via a floating support mechanism provided with a coil spring, and can be raised and lowered within a predetermined vertical dimension range.

  On the other hand, the second protective frame unit 4B is also raised and lowered in the same manner as shown in FIGS. 3 and 4 mounted on the upper part of the first protective frame unit 4A. As a result, the bowl-shaped outer hook 6 housed and installed in the bottomed cylindrical protective frame 4 composed of the first and second protective frame units 4A and 4B is also used for the first and second protective frame units. It moves up and down with 4A and 4B in the same manner (see arrows in FIG. 4).

  Therefore, when the inner pot 3 containing water and rice is stored on the outer pot 6 via the high platform support members 61, 61,... And the centering support members 62, 62,. According to the weight, the protective frame 4 and the outer hook 6 are lowered together with the inner hook 3 by a predetermined dimension, and the lower surface of the flange portion F at the outer end of the opening 3d of the inner hook 3 is connected to the opening 5a of the inner hook housing groove 5. The heat-resistant support member part on the inner peripheral edge part 82 of the shoulder member 8 is formed and supported in a state of being suspended from the part.

  As a result, in the case of this embodiment, the inner hook 3 provided with the first and second induction heat generating parts G1 and G2 on the bottom side is the first provided with the first and second work coils C1 and C2. The third work coil C3 and the third induction heating part G3 of the second protection frame unit 4B provided with the first and second work coils C1 and C2 and the third work coil C3 of the protection frame unit 4A The third induction heat generating part G3 of the outer pot 6 provided is set at an appropriate position and dimensional relationship.

  At this time, the hill support members 61, 61... And the centering support members 62, 62... Set an appropriate gap S between the outer hook 6 and the inner hook 3, and the centering support members 62, 62. ·· fulfills the centering function of the inner hook 3 during storage as described above.

<About the seal structure of the clearance for lifting>
By the way, when the protective frame 4 and the outer pot 6 are made floating with respect to the rice cooker body as described above, and the lifting space D is formed between the shoulder member 8 and the upper end 6d of the side portion 6c of the outer pot 6, There is a risk that heat between the inner hook 3 and the outer hook 6 escapes from the ascending / descending space D to the outside, water on the outer periphery of the inner hook 3 may invade, and the inner pot housing groove 5 does not look good. There are problems such as.

  Therefore, in this embodiment, they are assembled on the inner peripheral edge side of the metal plate 32, 32 for reinforcing the shoulder heater frame 31 and the shoulder heater cover 30 with respect to the shoulder member 8 described above on the upper side of the lifting space D. Later, as shown in FIGS. 3 and 4, for example, the shoulder member 8 is extended to a predetermined dimension on the inner peripheral surface side (opening inner peripheral surface side) of the upper end 6 d of the side portion 6 c of the lower outer hook 6. A skirt-like sliding packing 35 is attached to seal the elevating space D between the side portion 6c and the upper end 6d of the outer hook 6 in the inner and outer directions over the entire circumferential direction. When the shoulder member 8, the shoulder heater frame 31, the shoulder heater cover 31, the sliding packing 35, and the metal plates 32, 32 are superposed on each other and connected and integrated, the skirt portion of the sliding packing 35 ( The sealing edge 35b is the outer pot 6 It is adapted to slidably inscribed with the inner circumferential surface of the upper end 6d of the side 6c.

The packing 35 is provided with a fixing portion 35a fixed between the metal plates 32 and 32 and the shoulder heater cover 30 on the upper side of the skirt portion 35b. The fixing portion 35a is used to fix the packing 35. It is attached as shown in FIGS.
Yes.

<Installation of shoulder heater at shoulder>
As described above, the opening 5a of the inner pot storage groove 5 in the rice cooker main body of this embodiment has the shoulder member 8 fitted and fixed to the inner peripheral edge of the upper end 1c of the main body outer case 1a, and the shoulder. It consists of a shoulder heater cover 30 and a shoulder heater frame 31 that are connected and fixed from the lower side through metal plates 32 and 32 and a packing 35 inside the inner peripheral portion of the member 8. The cross-sectionally U-shaped structure is opened to the outside in the radial direction, and a shoulder heater H made of, for example, a code heater is provided on the entire outer circumferential surface. When the shoulder heater H generates heat, for example, as shown in FIG. 3 and FIG. 4, in the housed state in the inner hook storage groove 5, the thicker wall is formed radially inward in the opening 3 d of the corresponding inner hook 3. The lower part of the heat keep part HK is efficiently heated to prevent the occurrence of dew in the part, thereby preventing the occurrence of white blurring of rice.

<About the configuration of the coil stand>
On the other hand, on the lower side of the protective frame 4 configured as described above (the lower side of the first protective frame unit 4A), a synthetic resin dish-shaped coil base 9 that supports the bottom of the protective frame 4 is provided. Is provided. For example, as shown in FIG. 6, the coil base 9 is positioned on the upper surface side in the circumferential direction 4, and the first and second work coils C <b> 1 on the outer peripheral surface side of the first protective frame unit 4 </ b> A. , Ferrite core housing grooves 9a, 9a,... Extending in the radial direction corresponding to C2 are provided, and the first and second ferrite core housing grooves 9a, 9a,. .. Are accommodated for the work coils C1, C2. The first and second work coils C1, C2 are supported in four directions by the upper surfaces of the ferrite core housing grooves 9a, 9a,. Then, the first protective frame unit 4A and the coil base 9 are connected and fixed to each other using a connecting portion on the outer peripheral side.

  Further, on the outer peripheral side of the lower part of the coil base 9, four leg portions 9b, 9b,... Are provided downward corresponding to the positions of the ferrite core housing grooves 9a, 9a,. The leg portions 9b, 9b,... Are supported by floating support mechanisms 63, 63,... Provided on the bottom case 1b. A center sensor body fitting opening 9c is provided at the center of the coil base 9 so as to be concentric with the center sensor fitting hole 10a on the first protective frame unit 4A side. -The center sensor CS composed of an inner pan temperature detection sensor such as a thermistor is moved upward from below in a state that it can be moved up and down through the sensor body fitting port 9c and is always upwardly biased by a coil spring. It is installed so as to face.

<About the configuration of the lid>
On the other hand, the lid body 2 that covers the opening 5a of the inner pot housing groove 5 of the rice cooker body has an ABS resin that constitutes the outer peripheral surface thereof as shown in FIGS. 1, 2, 3, and 7, for example. And the like, and a support surface portion of the nameplate main body 20 and a concave portion 21a for installing a microcomputer board etc. in the front portion on the upper surface side, and a central housing portion of the lid body 2 including the peripheral wall portion 21b. The upper plate 21 made of synthetic resin, the lower plate 22 made of the same synthetic resin provided on the inner side (lower side) of the upper plate 21, and the lower surface on the outer peripheral side of the central portion of the main body 22 a of the lower plate 22. A metal heat radiating plate 23 having a lid heater (not shown) fitted and fixed to the concave portion 22b from below via a rubber first packing 25, and provided below the heat radiating plate 23; A second rubber member is attached to the outer peripheral edge portion of the frame member 27 through a removable frame member 27 made of synthetic resin. Kkin 14 are formed from attached metal inner cover 24.

  As described above, the outer packing 14 portion of the inner cover 24 is detachably fitted and attached to the inner cover fitting recess 22b provided on the outer peripheral side of the central portion of the lower plate 22 from the lower side. . Further, the outer peripheral side edge 22c portion of the lower plate 22 is engaged with the lower end side inner peripheral surface portion of the peripheral wall 21c portion of the upper plate 21 having a predetermined vertical width.

  By the way, in order to increase the pressure resistance strength, the outer peripheral side portion of the rear end portion of the main body portion 22a of the lower plate 22 serving as the center is locked to the connecting piece on the hinge unit 11 side via a connecting piece, a screw or the like. At the same time, on the upper surface of the main body portion 22a of the lower plate 22, a metal reinforcing plate having a predetermined thickness, a predetermined structure, and a large number of reinforcing ribs are provided across the left and right and front and rear. The whole is formed into a high-strength structure.

  That is, the lower plate 22 has an intermediate portion of the outer periphery on the rear end side of the main body portion 22a bent upward and houses the above-described hinge unit 11 on the inner side, and on the outer end side thereof. The descending portion covers the hinge unit 11.

  And the rear-end side outer periphery of the main-body part 22a of these lower plates 22 is made into the bracket for attachment, The said lid body 2 has the rear-end side via the hinge unit 11 with respect to the shoulder member 8 of the said rice cooker main body upper part. A locking and unlocking mechanism 13 that engages with a predetermined position of the lid body 2 to open and close the lid body 2 in the vertical direction is provided on the open end side (front end side). Is provided.

  Further, the upper surface outer periphery 21b forming the nameplate support surface portion of the upper plate 21 is, as shown in FIGS. 3 and 7, for example, a curved surface whose outer diameter is gradually enlarged from the upper side to the lower side. The lower end side is connected and integrated with the upper end side of the peripheral wall portion 21c described above via a nameplate fitting groove (U-shaped groove). The nameplate body 20 forming the transparent window 60c corresponding to the operation panel 60 surface and the liquid crystal panel 60A as shown in FIGS. 2 and 3 is formed into a shape corresponding to the support surface shape of each part of the upper plate 21. For example, as shown in FIG. 3 and FIG. 7, the plate is integrated and integrated in a substantially flush state by using the nameplate fitting groove on the outer periphery of the upper plate 21. Further, a waterproof cover 80 made of, for example, PET resin for waterproofing and protection is further stuck (polymerized) on the upper surface of the nameplate main body 20, and a so-called nameplate is constituted by both of them.

  As described later, the nameplate body 20 of the nameplate is provided in a downwardly inclined state in which the height gradually decreases from the rear end side steam unit 51 portion toward the front end side, and supports the nameplate body 20. The support surface structure of the upper plate 21 constituting the surface portion also has a downward inclined surface structure corresponding to the front end side (see FIG. 8).

<Configuration of pressure adjustment mechanism in lid part>
In this embodiment, it shows about the case where it applies to a pressure type electric rice cooker as an example, and in the approximate center part of the above-mentioned lid 2, only steam is escaped to the outside while recovering the viscous component, and in the rice cooking process Accordingly, a pressure adjusting unit 26A for adjusting the pressure in the inner hook 3 in a plurality of stages is provided.

  The pressure adjusting unit 26A is configured by, for example, steam escape passages 50, 50a to 50c that are detoured from the inner pot 3 toward the outside, and pressure adjusting mechanisms provided in the steam escape passages 50, 50a to 50c (this A plurality of pressure regulating units 26A are actually provided, but in the case of this embodiment, since it is not an essential configuration, the details thereof are omitted).

<About the configuration of the operation panel and display panel on the top of the lid>
1 to 3 is an operation panel. The operation panel 60 is configured using the nameplate body 20, and a substrate having a predetermined depth and a liquid crystal panel storage box are provided on the back side of the panel portion. The microcomputer board 60B and the liquid crystal panel 60A provided with a microcomputer as rice cooking and heat retention control means are fitted and accommodated in the opening of the upper plate 21 and the recessed groove portion of the upper plate 21.

  The central portion has a transparent window 60C corresponding to the display surface of the liquid crystal panel 60A. Around the transparent window 60C, a rice cooking reservation switch SW1, a rice cooking switch SW2, a heat retention switch SW8, and a cancel switch are provided. SW3, menu switches SW5 (return), SW6 (recommend), hot spring selection switch SW4, voice guide SW7, voice guide SW7, clock and timer selection menu Various operation keys of the time / minute setting switch SW9 are provided.

  The rice cooking reservation switch SW1, the rice cooking switch SW2, the heat retention switch SW8, the cancel switch SW3, the menu switches SW5 (return), SW6 (sume), the fire selection switch SW4, the voice guide SW7, the time of the clock and the timer The various operation keys of the minute setting switch SW9 are operation keys (operation switches) having a touch panel structure, and although not shown below each of them, the operation keys having the touch panel structure are shown in FIG. As shown in FIG. 1, there is an illumination LED for bright and clear display (FIG. 1 shows a display state in the energy saving mode, and the illumination LED is not lit).

  In the case of this embodiment, as described below, the microcomputer board 60B is provided with a human sensor MS made up of, for example, a pyroelectric sensor for detecting that a user is in a predetermined corresponding area such as an operation corresponding position. Regardless of whether it is in standby mode, non-standby mode, or other rice cooker operation status, at least when the user is not in the predetermined response area such as the operation support position, the liquid crystal panel is controlled to the energy saving mode. In addition to the display function and the illumination function, the operation function and illumination function of the operation switch are turned off to reduce power consumption as much as possible. As a result, in the energy saving state, as shown in FIG. 1, for example, the upper surface of the lid 2 of the electric rice cooker body is in the “smoked state”, except for the concave lens portion 80a for light reception of the human sensor MS described below. You can't see anything.

  Of course, in this case, for example, it is free to perform necessary displays such as “cooking rice” and “warming”.

<About the structure and installation structure of the human sensor on the lid>
In the case of this embodiment, for example, as shown in FIGS. 1, 2, 7, and 8, the above-described human sensor (motion sensor) MS is provided in the front left portion of the lid 2. The human sensor MS has a configuration as shown in FIGS. 9 to 12, for example. The user can check the operation setting or the operation setting state, the rice cooking state, the heat retaining state, the clock display, etc. It is configured to function as a human detection sensor that approaches the front-side operation corresponding position of the main body and detects that its upper body (for example, shoulder, face, hand, etc.) has come on the operation panel 60.

  That is, the human sensor MS includes a light receiving lens 91 and collects infrared light from the outside, and receives the infrared light collected by the light receiving unit 90a and outputs an electrical signal. It is composed of a light receiving circuit section (sensor body section) 90b, and the infrared light incident through the light receiving lens (Fresnel lens) 91 of the light receiving section 90a is passed through the infrared filter 92 and is selected to have a preset band. The voltage signal corresponding to the amount of light received from the pyroelectric element 93 in the light receiving circuit section 90b is impedance-converted by the FET 96, amplified to a predetermined voltage level, and output. It is like that.

  In the case of this embodiment, the pyroelectric element 93 is a rectangular pyroelectric electrode 93a, 93b having a predetermined length made of pyroelectric ceramics, which is a kind of piezoelectric ceramic, as shown in FIGS. Are arranged in parallel with each other, and a pair of pyroelectric electrodes 93a and 93b that are parallel to each other detect the distance to the incident infrared light source, and within a predetermined time. The movement of the user is detected based on the change in the difference between the detection distances of each and the presence or absence of the user is determined.

  For example, as shown in FIG. 12, the pyroelectric electrodes 93a and 93b are connected in series so as to have opposite polarities to each other, and on the output side, a source follower circuit is formed to convert impedance (for amplification). ) Of the FET 96 is connected. As a result, the impedance of the pyroelectric electrodes 93a and 93b, which is essentially high impedance, can be effectively reduced, and the sensor signal Vpp having an effective voltage level can be output.

  Rg is a resistance value of the pyroelectric ceramics part of the pyroelectric electrodes 93a and 93b, Rs is a source resistance connected between the source part of the FET 96 and Gnd, and Vcc is a drain voltage applied to the drain part of the FET 96. Yes.

  When infrared light enters the pyroelectric electrodes 93a and 93b and the temperature of the pyroelectric ceramic portions of the pyroelectric electrodes 93a and 93b rises, spontaneous polarization occurs, and charges corresponding to the amount of temperature rise are generated on the surfaces ( Pyroelectric effect). A current i due to this electric charge flows through the resistor Rg of the pyroelectric ceramic portion, and a gate voltage Rg · i that can control the value of the drain current Id flowing between the drain and the source of the FET 96 at both ends of the resistor Rg. Occur.

  The gate voltage Rg · i controls the conduction state between the drain and the source of the FET 96, and a drain current Id corresponding to the magnitude of the gate voltage Rg · i flows from the drain side to the source side of the FET 96. The drain current Id flows through the source resistance Rs. As a result, an output voltage Vpp of Id · Rs is generated at both ends of the source resistance Rs as shown in, for example, (L) or (R) of FIG. 18, and this becomes a sensor signal of the human sensor MS. The voltage level of the sensor signal Vpp is the magnitude of the gate voltage Rg · i generated at both ends of the resistance Rg of the gate-side pyroelectric electrodes 93a and 93b of the FET 96, that is, the infrared light incident on the pyroelectric electrodes 93a and 93b. It corresponds to the magnitude of the current i generated in the pyroelectric ceramic portion according to the amount of light.

  And the distance to the light source of each incident infrared light is detected by the sensor signal Vpp corresponding to the incident light quantity to each of the pair of pyroelectric electrodes 93a and 93b parallel to each other, and each within a predetermined time. The user's movement (motion) is detected depending on whether or not the difference in the detection distance is changed, and it is determined whether or not the user is at a predetermined corresponding position corresponding to the rice cooker body. For example, as shown in FIG. 24, whether or not the user is present at the predetermined corresponding position is automatically determined by inputting the sensor signal Vpp to the microcomputer control unit 100 on the microcomputer board 60B side.

  When it is determined that the user is at the predetermined corresponding position, the microcomputer control unit 100 controls the operation board circuit control means 111 for controlling the supply state of power to the operation board circuit, and the LED for operation switch illumination. Operate the driving means 114 and the like to supply power to the operation board circuit of the operation panel 60 in the non-energized state (energy saving mode), and further set the operation of rice cooking or heat retention function by operating various operation switches SW1 to SW9. The operation functions such as cancel, change, etc., and display by illumination of each of these operation switches SW1 to SW9 are enabled, and the liquid crystal panel drive control means 112 is operated to turn off the light when the user is not at a predetermined corresponding position. The backlight of the liquid crystal panel 60A was turned on, and the liquid crystal panel 60A was not displayed when there was no user. To display the information of the liquid crystal panel 60A of Tsu.

  As a result, the operation switches and the liquid crystal panel portion of the operation panel 60 on the upper surface of the lid body 2 that has been in the masking state (opaque state) as shown in FIG. Illuminated and displayed. On the other hand, when it is determined that there is no user, the control is reversed.

  Accordingly, the user operates each operation switch SW1 to SW9 of the operation panel 60 while viewing the display information of the liquid crystal panel 60A that is brightly illuminated and displayed through the transparent window 60c. Can be canceled, changed. Moreover, confirmation of the operation setting state in the rice cooking standby state at the time of timer reservation, the rice cooking state during rice cooking, the heat insulation state during heat insulation, a clock display, etc. can also be confirmed. In addition, the code | symbol 115 in FIG. 24 is heating output control means, such as a work coil.

  Moreover, each of them is automatically realized simply by the user approaching the electric rice cooker body, and does not require any manual operation such as an ON operation of the operation key, which is very convenient.

  In addition, in the case of such a configuration, it is not limited to just a standby state as in the prior art. In short, when the user is not near the electric rice cooker and there is no need for operation and display, most of the time including the clock display is included. Since it is possible to save or stop the supply of power to the power consuming part, the energy saving effect is extremely high.

  In addition, the code | symbol 94 in FIG. 12 has shown the one-chip IC incorporating the above various electronic devices.

By the way, the detection sensitivity and detection area of the human sensor MS as described above are such that the user approaches the electric rice cooker body as described above, faces the operation panel 60 surface of the upper surface portion, and appropriately operates. Since it is set to take into account the amount of infrared light emitted from the user's human body, based on being in a normal operation-corresponding position, the amount of infrared light detected from other positions is It can be eliminated as a disturbance. Therefore, the amount of infrared light incident on the pyroelectric electrodes 93a and 93b corresponding to the user's body temperature at the original operation-corresponding position is used as a reference value, and even the amount of infrared light actually input is detected as a reference. For example, in the case of an electric rice cooker like this embodiment, it is possible to detect the approach of the user properly and take the above-mentioned response almost accurately. As described above, the steam unit 51 for pressure adjustment is provided, and the steam unit 51 has a pair of left and right steam ports 51a and 51a. And from this steam port 51a, 51a, the high temperature steam V blows off at the time of rice cooking (boiling maintenance process). Therefore, even if the light receiving surface of the light receiving unit 90a of the human sensor MS is at a position lower than the upper surface of the lid 2 (the upper surface of the nameplate 20), for example, as shown in FIGS. If the upper surface of the lid 2 (the upper surface of the nameplate 20) is flat from the rear end side where the steam unit 51 is located to the front end 20b side, the light receiving angle θa in the front-rear direction of the light receiving unit 90a of the human sensor MS is There is a problem that it becomes wider on the rear side, and the infrared rays of the steam V from the steam ports 51a, 51a are detected, and proper user detection cannot be performed. As a result, the transition to the appropriate energy saving mode as described above and the release performance are hindered.

  Therefore, in the configuration of this embodiment, for example, as shown in FIGS. 3 and 8, first, the entire front side portion 20a of the steam unit 51 of the nameplate 20 constituting the upper surface portion of the lid body 2 is arranged. The front end 20b is configured to have an inclined surface that is inclined downward by a predetermined angle θb so that the height gradually decreases toward the front end 20b (refer to the configuration of FIG. 8 in particular), and the front end having a large inclination angle of the nameplate 20 that is the downward inclined surface. A circular first light receiving opening 20c is formed on one side of the side portion (next to the timer reservation switch SW1; see FIG. 2), and on the microcomputer board 60B provided in the microcomputer board installation space 28 on the lower side. The human sensor MS including the light receiving unit 90a and the light receiving circuit unit 90b described above is installed.

  A substrate cover 29 is provided on the microcomputer board 60B except for a portion corresponding to the liquid crystal panel 60A, so that predetermined electronic components on the microcomputer board 60B are covered. In the portion corresponding to the same shape as the light receiving portion 90a of the human sensor MS on the microcomputer board cover 29 side and the first light receiving opening 20c on the nameplate 20 side, a circular second light receiving opening ( 29a) having a diameter slightly larger than that of the first light receiving opening 20c.

  And by these structures, the groove part of the predetermined depth for the said human sensor MS installation as shown in FIG. 7 is formed, and the said human sensor MS is installed in the form accommodated in the said concave groove part. Thus, only infrared light incident on the light receiving portion 90a through the first and second light receiving openings 20c and 29a is accurately detected.

  In addition, in this case, the front side portion 20a of the nameplate 20 with respect to the unit 51 is inclined downward from the front side of the steam unit 51 to the front end 20b side at the predetermined lowering angle θb as described above. Accordingly, the first light receiving opening 20c opened at the inclined surface portion of the nameplate 20 has a circular opening surface corresponding to the descending inclination angle θb, for example, as shown in FIG. The light reception detection angle θa in the front-rear direction is also inclined by θb from the vertical direction to the front side obliquely downward.

  As a result, infrared light due to the steam V blown from the steam ports 51a and 51a of the steam unit 51 located at the rear end of the central portion of the nameplate 20 is not detected, and more accurate user detection is possible. .

  Moreover, in this embodiment, as is apparent from FIGS. 1 and 2, the human sensor MS first takes a large distance from the steam ports 51a and 51a of the steam unit 51 in the direction of the front end of the rice cooker body. Further, the steam ports 51a and 51a are provided close to the rear side of the central portion of the lid, which is provided close to the left side of the nameplate 20 (left side of the timer reservation switch SW1). The portion is installed in a state in which the position in the left-right direction is greatly shifted (see the displacement width a in FIG. 1), and is offset so as not to correspond at all in the front-rear direction. Therefore, in combination with the effects such as the tilt angle θb described above, erroneous detection is less likely to occur.

  Further, in the case of this embodiment, in the above case, the upper surface of the nameplate main body 20 has a translucent waterproof cover (surface of the nameplate main body 20 surface) close to a film structure made of a synthetic resin material such as PET (polyethylene terephthalate). A waterproof synthetic resin thin plate 80 also serving as a protective function is attached (polymerized), and the waterproof cover 80 is provided near the left end of the front end of the nameplate body 20. 7 and 8, for example, as shown in FIGS. 7 and 8, the concave portion of the first light receiving opening 20c is recessed into a concave spherical shape, and the concave spherical portion is infrared light from the external detection area. The condensing concave lens 80a is formed so that the light is efficiently collected and incident on the light receiving portion 90a of the human sensor MS described above with high sensitivity. As a result, a relatively wide range of infrared light can be efficiently incident to the inside of the concave groove inside the nameplate 20 where the light receiving portion 90a of the human sensor MS is located.

  However, even if the PET material used for the waterproof cover 80 is configured to be transparent or semi-transparent, it does not necessarily efficiently transmit infrared rays due to the spectral characteristics based on the crystal structure. Accordingly, in order to improve the infrared transmittance, the waterproof cover 80 is preferably formed as thin as possible. However, if the cover 80 is made too thin, the above-described operation panel or the like is not illuminated (the state shown in FIG. 1). The operation switch and the LED illumination hole can be seen and it is difficult to see, and the protective function of the nameplate body 20 is also reduced.

  Therefore, in this embodiment, for example, as shown in FIG. 8, the cover surface portion other than the concave spherical surface portion forming the concave lens 80 a maintains a constant thickness giving priority to the masking effect and the protective function, The concave spherical surface portion that forms the concave lens 80a is configured to have a particularly small thickness and a high infrared transmittance.

  At the same time, a dome-shaped light receiving lens 91 is provided at the light receiving portion 90a on the human sensor MS side as shown in FIG. 9, for example, and the dome-shaped light receiving lens 91 is connected to the pyroelectric element 93. It is configured to function as a high-sensitivity convex lens with a high concentration and convergence function of infrared rays on the part. The dome-shaped light receiving lens 91 has a dome-shaped condensing part (for example, a large number of curved lenses having a triangular cross section arranged in a concentric circle so that light refracted by each triangular portion passes through the same focal point. Infrared-converging lens portion made up of a curved Fresnel lens) 91a and a cylindrical portion 91b on the lower side thereof, and the cylindrical portion 91b is a light receiving circuit that is a sensor body portion of the human sensor MS inside. A stepped portion (large-diameter portion) that fits around the outer periphery of the housing portion of the portion 90b is formed, and is fitted to the outer periphery of the housing portion of the light receiving circuit portion 90b that is the sensor body portion with high dimensional accuracy. As shown in the figure, the vertical dimension of the stepped portion (large diameter portion) in the cylindrical portion 91b is the same diameter as that of the light receiving circuit portion 90b including the pyroelectric element 93 including the pair of pyroelectric electrodes 93a and 93b. When the both are accurately fitted in the state of FIG. 9, the pyroelectric electrodes 93a and 93b of the pyroelectric element 93 are connected to the concave lens 80a. It is possible to set a focal length at which the infrared light is converged almost accurately. Further, on the outer peripheral surface side of the cylindrical body portion 91b, there is provided a stepped portion (large diameter portion) with which the sensor restrainer 29a from the upper side provided on the microcomputer board cover 29 side is engaged. As shown in FIG. 4, the human detection sensor MS itself fitted with the light receiving lens 91 on the upper side and accurately adjusted in focal length is moved by vibration or the like so that the set focal length does not fluctuate. It is designed to be securely fixed.

  Further, a part of the cylindrical portion 91b on the light receiving lens 91 side in the circumferential direction on the lower end side is provided with a positioning tab T provided on a part of the light receiving portion 90b in the circumferential direction on the lower end side. Similar tabs T are provided which are correspondingly positioned, and these tabs T, T are accurately fitted to each other and fitted to each other, and have three pinholes N1 to N3 on the microcomputer board 60B. By mounting on the installation portion 120 (see FIG. 19 and FIG. 20), it can be properly installed with the focal length accurately adjusted. Moreover, the installation which considered the suitable light distribution characteristic is attained by it.

  The energy of the radiated infrared rays radiated from the human body (infrared light source) decreases in inverse proportion to the square of the distance to the pyroelectric element 93. Therefore, in order to increase the detection sensitivity of the human sensor MS, it is necessary to optically amplify such infrared energy. As described above, when the condensing concave lens 80a is provided in the light receiving opening 20c and the converging convex lens 91a is provided in the light receiving portion 90a of the sensor, they act as an optical two-stage amplification means. Thus, it is possible to amplify infrared energy radiated from the human body very effectively. As a result, the detection sensitivity of the human sensor MS is improved.

  Further, as described above, the concave lens 80a in the light receiving opening 20c portion is concave and concave, and accordingly, the optical distance from the convex lens 91a on the sensor side becomes closer and more optical. The degree of amplification can be increased. In addition, since it is less likely to come in contact with external obstacles, scratches and dirt are less likely to be attached, and infrared transmittance can be maintained high. Damage is less likely to occur.

  In addition to the dome-shaped Fresnel lens as described above, for example, a large number of linear lenses having a triangular cross-section are arranged on a concentric circle in the dome-shaped condensing portion 91a on the light receiving lens 91 side. A flat Fresnel lens that allows the light refracted at the same part to pass through the same focal point, or a normal convex lens that increases in thickness from the outer periphery toward the center, can be used to achieve the same effect. can do.

  According to the above configuration, the user detection sensitivity of the human sensor MS can be improved as much as possible. However, as described above, the human sensor MS employed in the present embodiment is a pyroelectric sensor, and the dual pyroelectric element 93 includes a pair of pyroelectric electrodes 93a and 93b parallel to each other. A type pyroelectric sensor is used. In the case of such a sensor, the distance to the light source (user's body) of the incident infrared light is detected by each of the two sets of pyroelectric electrodes 93a and 93b parallel to each other, and the difference between the respective detection distances. The movement of the user is detected based on the change in the number and it is determined whether the user is present or absent.

  Therefore, for example, as shown in FIGS. 15 and 17, when these two sets of pyroelectric electrodes 93a and 93b are simply arranged in parallel in the front direction where the user is present, the two sets of pyroelectric electrodes 93a are arranged. , 93b, the incident light quantity of infrared rays is the same, and the temperature rise of the pyroelectric ceramic portion is also equal, so the current i flowing through the resistance Rg of the pyroelectric electrodes 93a, 93b cancel each other, and the gate current of the FET 96 is not generated. The sensor signal Vpp is not generated (see (F) in the signal waveform diagram of FIG. 18). Therefore, there is no difference in the detected detection distance, and the presence of the user cannot be detected. Of course, the actual movement of the user also involves left and right movements to some extent, so that a small amount of signal is produced but it is difficult to achieve a sufficient signal level and accurate detection is difficult. This is the same when, for example, as shown in FIG. 16, these two sets of pyroelectric electrodes 93a and 93b are arranged in parallel in the left-right direction. A predetermined detection sensitivity can be realized in the lateral direction or vice versa, but it becomes impossible to detect the movement of a person moving in parallel from left to right or from right to left.

  On the other hand, in the installation state of the pyroelectric electrodes 93a and 93b similar to FIGS. 15 and 17, for example, as shown in L of FIG. 17, a person moves from the left direction to the right direction from the pyroelectric electrode 93b side. When infrared rays sequentially enter the pyroelectric electrode 93a side, for example, as shown in a signal waveform diagram (L) of FIG. 18, the incident light amounts of infrared rays incident on the pyroelectric electrodes 93b and 93a are equal, and the pyroelectric ceramic portion Even if the temperature rise is equal, there is a predetermined time difference in the timing at which charges are generated in them, so that the current i in different directions flows through the pyroelectric electrodes 93b and 93a at the timing when the infrared rays are incident. The gate current of the FET 96 is controlled by the voltage generated by i and the resistance Rg, and a sensor signal Vpp corresponding to each incident light amount is generated.

  Further, in the same state as the pyroelectric electrodes 93a and 93b shown in FIGS. 15 and 17, for example, as shown by R in FIG. 17, a person moves from the right direction to the left direction and the pyroelectric electrode from the pyroelectric electrode 93a side. When the infrared rays are sequentially incident on the 93b side, for example, as shown in the signal waveform diagram (R) of FIG. 18, the incident light amounts of the infrared rays incident on the pyroelectric electrodes 93a and 93b are equal, and the temperature of the pyroelectric ceramic portion increases. Are equal to each other, there is a predetermined time difference between the timings at which electric charges are generated. Therefore, currents i in different directions flow through the pyroelectric electrodes 93a and 93b at the timing at which infrared rays are incident. The gate current of the FET 96 is controlled by the voltage due to Rg, and a sensor signal Vpp corresponding to each incident light amount is generated.

  That is, when the above-described dual type pyroelectric sensor having a pair of pyroelectric electrodes 93a and 93b parallel to each other is employed as the pyroelectric element 93, each of the pyroelectric electrodes 93a and 93b is It can be seen that effective detection sensitivity can be realized when the light source crosses with a predetermined time difference, but effective detection sensitivity cannot be realized when the light source moves in parallel therewith. However, the movement of the user varies, and such a sensor having a specific direction cannot necessarily increase the effective detection sensitivity.

  Therefore, in this embodiment, as shown in FIGS. 13 and 14, for example, each pyroelectric electrode 93a, 93b portion of a dual type pyroelectric sensor having a pair of pyroelectric electrodes 93a, 93b parallel to each other. Is installed on the microcomputer board 60B in a state where it is inclined by 45 degrees in an oblique direction when viewed from the front. In this way, as indicated by the arrows in FIG. 14, the infrared ray incidence F from the front side to the rear side direction (from the back side to the front side direction), the infrared ray incidence L from the left side to the right side, and the right side In any case of infrared incidence R from the left side to the left side, the light source (human body) crosses each pyroelectric electrode 93a, 93b (93b, 93a) with a certain time difference, and the required detection sensitivity. Can be greatly expanded in both the XY directions.

  In this case, the human sensor MS has, as shown in FIGS. 9 and 10, for example, three mounting pins P1 to P3 on the lower surface portion of the sensor housing, for example, as shown in FIGS. In this case, as shown in FIG. 19, for example, as shown in FIG. 19, the sensor installation unit 120 is installed in the sensor installation unit 120 portion having the corresponding pinholes N1 to N3 on the microcomputer board 60B. If the mark tab T ′ corresponding to the inclination angle of the pyroelectric electrodes 93a and 93b is also provided in the portion by silk printing or the like, the inclination angle state of about 45 degrees is related to the sensor housing side tab T described above. Easy installation.

  That is, in this case, the tab T for positioning with the light receiving lens 91 provided at the lower end on the sensor housing side is inclined at about 45 degrees with respect to the pyroelectric electrodes 93a and 93b. If the tab T is installed in accordance with the mark tab T ′ of the sensor installation section 120 on the assumption that the pyroelectric electrodes 93a and 93b are securely attached at an inclination angle of about 45 degrees. I am trying to do it. With such a configuration, for example, as shown in FIG. 20, the three mounting pins P1 to P3 are mounted more accurately and efficiently than the case where only the three pinholes N1 to N3 are mounted as marks. Will be able to.

  Moreover, in the case of the configuration of this embodiment, as is apparent from FIG. 13, the human sensor MS is most sandwiched between the power supply ICs 98 and 98, which are heat generating components, on the microcomputer board 60B with the liquid crystal panel 60A interposed therebetween. It is arranged at a position on a diagonal line far away. Therefore, the influence of the heat generating components on the microcomputer board 60A can be avoided as much as possible for the human sensor MS that dislikes the influence of heat, and the detection accuracy can be further increased.

  As in this embodiment, the presence sensor MS for detecting the presence of the user is provided so that the presence of the user in the predetermined corresponding area can be detected. When the user is not near the electric rice cooker While the operation switch units SW1 to SW9 and the liquid crystal panel unit 60A of the operation panel unit 60 of the lid body 2 are automatically set to an energy saving state (power supply OFF or power supply save), the power consumption is reduced as much as possible. When the human sensor MS detects the presence of the user, when the configuration that automatically cancels the previous energy saving state and enables the desired operation and display, the energy saving mode setting and The control performance and reliability of the release depend on how reliably the presence sensor MS can detect the presence of the user, that is, the user detection sensitivity of the presence sensor MS. That.

  As the human sensor MS for detecting the presence of the user as described above, infrared light emitted from the user's body (light source) is incident on the light receiving unit (pyroelectric element) according to the body temperature, and the user at a predetermined position It is equipped with a pyroelectric infrared sensor that detects the presence of the sensor, an infrared light emitting part (light emitting diode) and an infrared light receiving part (phototransistor) that are separate from the user's body, and is emitted from the infrared light emitting part (light emitting diode). A reflected light receiving infrared sensor that detects the presence of a user at a predetermined position by receiving infrared light reflected by the user's body with an infrared light receiving unit (phototransistor), or an image detection type person using a solid-state imaging device Various devices such as detection sensors can be used.

  However, in the case of the reflected light receiving type infrared sensor, in addition to the two independent optical elements of the light emitting part and the light receiving part, two optical system paths of the light emitting system path and the light receiving system path are necessary, and the cost is high. It is difficult to install in the lid of an electric rice cooker, which has a complicated structure and many space constraints. In addition, an image detection type human detection sensor using a solid-state imaging device is inevitably expensive. For this reason, in this embodiment, the configuration is relatively simple and the cost is low. Infrared light having the user's body as the light source is incident on the light receiving unit (pyroelectric element) and the user at a predetermined position is placed. Employing a pyroelectric infrared sensor that detects the presence, and providing optical amplification means in multiple stages, such as a concave lens structure and a convex lens structure, on the optical system path, compensates for the attenuation of radiant infrared energy from the human body. Further, the detection sensitivity is improved as much as possible by improving the infrared transmittance of the light receiving opening.

  In that case, as the pyroelectric elements of the pyroelectric sensor, for example, as shown in FIGS. 9 to 14, a dual type having two sets of pyroelectric electrodes 93a and 93b is adopted, and these two sets are used. Each of the pyroelectric electrodes 93a and 93b detects the distance to the incident infrared light source (user's body), and the user's movement is accurately detected by the change in the difference between the detection distances. Whether or not there is is surely judged.

  In that case, the two sets of pyroelectric electrodes 93a and 93b are simply juxtaposed in parallel with the front direction where the user is located, or in parallel with the left and right directions at 90 ° positions. In this case, since the detection function only works in the direction crossing either the front-rear direction or the left-right direction, the detection distance detected by the two sets of pyroelectric electrodes 93a and 93b in the other movement directions. It is difficult to make a difference in detection and it is difficult to improve detection sensitivity.

  Therefore, in this embodiment, as shown in FIGS. 13 and 14, for example, each pyroelectric electrode 93a, 93b of a dual type pyroelectric sensor provided with two sets of pyroelectric electrodes 93a, 93b parallel to each other. The part is installed on the microcomputer board 60B in a state where it is tilted by about 45 degrees in an oblique direction when viewed from the front direction, and as indicated by an arrow in FIG. 14, from the front side to the back side direction (from the back side to the front side). In the case of any movement of infrared incidence F in the lateral direction, infrared incidence L in the left to right direction, and infrared incidence R in the right to left direction, each pyroelectric electrode 93a, 93b (93b, 93a) ensures that the light source (human body) crosses with a certain time difference, and the range in which the required detection sensitivity can be maintained is greatly expanded in both the X and Y directions.

  Therefore, combined with the above-described detection sensitivity improving effect by the optical amplifying means or the like, a detection sensitivity that is sufficiently practical can be realized.

<About the installation state of the tilt sensor in the lid and the configuration of the sensor>
Furthermore, in this embodiment, in addition to the human sensor MS described above, the battery substrate 60C attached to the microcomputer substrate 60B in the lid 2 is also described above as shown in FIGS. An inclination sensor (lid opening / closing sensor) IS for detecting opening / closing of the lid body 2 is provided, and a touch switch portion when the user opens / closes the lid body 2 using a detection signal of the inclination sensor IS is provided. I try to prevent misoperation.

  As already described, in this embodiment, the operation switch portion of the operation panel 60 on the upper surface side of the lid 2 has a touch panel structure (touch switch structure). When the touch panel structure is employed in this manner, the operation switch portion can be turned on only by lightly touching the touch switch portion with a fingertip, and operation and input are significantly facilitated.

  However, on the other hand, it is possible that the user's finger touches the touch key unintentionally during the opening / closing operation of the lid 2 that does not operate the operation switch. In this case, since the user is in the detection corresponding area of the human sensor MS in any case, the human sensor MS detects the presence of the user, cancels the energy saving mode, and operates the operation switches SW1 to SW9. The illumination display by the LED is also made, and the liquid crystal panel 60A is also illuminated, displayed, and driven. That is, an erroneous operation such as an operation switch occurs.

  Therefore, in this embodiment, the opening / closing state of the lid 2 is detected by the tilt sensor IS, and at least in the lid open state, even if the human sensor MS detects the presence of the user, the operation key input of the operation switch Is impossible, and such erroneous operation input is prevented.

  For example, as shown in FIGS. 21 and 22, the inclination sensor IS is provided in a square-shaped solid packaging 99 having a predetermined thickness mounted on a battery substrate 60c having a vertical wall structure on which a battery E is installed. Further, the shape of the packaging 99 is formed in a state where the position is shifted by 90 degrees, and a square-shaped light shielding object moving space 99a having a small dimension is formed. First, a predetermined diameter having a short axial length is formed in the light shielding object moving space 99a. A shading object (rotating body) 99b made of a flat cylindrical body is rotatably provided.

For example, as shown in FIG. 23, the light shielding object 99b freely rotates in the light shielding object moving space 99a according to the rotational inclination of the packaging 99 in the front-rear direction corresponding to the open / closed state of the lid 2, It stops at the four corner positions a to d of the shader moving space 99a in the packaging 99 shown in FIG .

  On the other hand, on the outer side of at least three corner positions a, b, and d among the four corner positions a to d of the packaging 99, for example, the infrared light emitting diode D and the front end side corner position at the upper end corner position a portion. The phototransistor T1 is arranged in the part b, the phototransistor T2 is arranged in the rear end side corner position d, and the power source Vcc is connected to the anode side and the collector side, and the current limiting resistor R and the load resistors R1 and R2 are connected to the ground side. Has been.

  Therefore, in the case of the same configuration, for example, when the light shield 99b is at the corner position a, both the phototransistors T1 and T2 are shielded and the outputs are both OFF, and then when the light transistor 99b is at the corner position b, the phototransistor T1 is OFF. The phototransistor T2 is ON, and when the phototransistor T1 is at the corner position c, both the phototransistors T1 and T2 are ON, and when the phototransistor T2 is at the corner position d, the phototransistor T1 is ON and the phototransistor T2 is OFF. Therefore, the tilted state in the front-rear direction, that is, the open / closed state of the lid 2 as shown in FIG. 23 can be determined by the combination of the ON and OFF outputs V1 and V2 of the phototransistors T1 and T2.

  Now, the packaging 99 of the tilt sensor IS is in a state in which the light-emitting diode D as shown in FIG. 23, for example, is directly above in the closed state of the lid 2 (at a tilt angle of about 5 degrees, the corner position a in FIG. If the cover body 2 is closed, the phototransistors T1 and T2 are both in the ON state, and the output V1, Both V2 are H. Then, a signal of a combination of both outputs V1 and V2 is input to the microcomputer control unit 100 of FIG. 24 as a signal indicating the closed state of the lid body 2, for example.

  Thereafter, when the lid body 2 is opened, the corner position a and the light emitting diode D portion gradually incline in the horizontal direction according to the rearward rotation of the lid body 2, and the corner position d portion is displaced downward. Then, the light shield 99b moves from the corner position c to the corner position d (see the state of θ1 in FIG. 23).

  From the same state, when the lid 2 is further opened and finally opened to the maximum open position θ2 (slightly before 90 degrees), the light emitting diode D, the corner position a, and the corner position c are in a substantially horizontal state. On the other hand, the corner position b is directly above and the corner position d is directly below, and the light shield 99b stops at the corner position d, and the phototransistor T2 is turned OFF. As a result, the phototransistor T1 is ON, the output V1 is H, the phototransistor T2 is OFF, and the output V2 is L. Then, the combination of the output V1 being H and the output V2 being L is input to the microcomputer control unit 100 together with the output signal Vpp of the human sensor MS as shown in FIG. Then, the above-described touch switch portion of the operation panel 60 and the energy saving mode and the energy saving mode release control of the liquid crystal panel 60A are controlled.

  As a result, according to the above configuration, for example, when it is determined that the lid 2 is securely closed based on the detection result of the tilt sensor IS, the user is determined based on the detection result of the human sensor MS. When there is, the operation unit can be operated and the display unit can be displayed, and proper operation and setting can be performed.

  On the other hand, at least when the inclination sensor IS detects the opening of the lid 2, even if the human sensor MS detects the presence of the user, the detection result of the inclination sensor IS is given priority over the above operation. It is possible to perform a desired control such that the operation and setting cannot be performed by controlling the energy saving mode in which the operation of the unit and the display of the display unit are impossible.

<Other embodiments>
First, in the description of the above embodiment, as an example, the case where the invention of this application is applied to an electromagnetic induction type electric rice cooker including a ceramic inner pot and a ceramic outer pot has been described. However, as is apparent from the contents of the essential technical idea, the invention of this application is never applied only to the electric rice cooker having the specific configuration as described above. For example, the invention has no outer pot. Various configurations such as an electric rice cooker with a ceramic inner pot, an electric rice cooker with a non-ceramic metal inner pot, an electric rice cooker with a non-metallic inner pot, a heater type electric rice cooker that is not electromagnetic induction type, etc. Even if it is applied to general electric rice cookers, the above-mentioned beneficial effects can be obtained in exactly the same manner.

  In addition, for the lid opening / closing sensor that detects the opening / closing of the lid body, it is possible to employ various types of inclination sensors other than the above-described inclination sensor using a combination of a light-emitting diode, a pair of phototransistors, and a movable light blocking object. is there. Considering that the opening / closing of the lid is detected, the sensor is not necessarily limited to the tilt sensor. For example, a proximity sensor or a limit switch combining a light emitting element and a light receiving element can be employed.

  1 is a rice cooker body case, 1a is an outer case, 1b is a bottom case, 2 is a lid, 3 is an inner pot, 3a is a bottom part, 3b is a bent part, 3c is a side part, 3d is an opening part, and 4 is a protective frame 4A is the first protective frame unit, 4B is the second protective frame unit, 5 is the inner hook storage groove, 6 is the outer pot made of ceramic, 6a is the bottom, 6b is the bent portion, 6c is the side portion, and 6d is Side upper end, 7 is a magnetic shielding plate, 8 is a shoulder member, 9 is a coil base, 60A is a liquid crystal panel, 60B is a microcomputer board, 80 is a waterproof cover, 80a is a concave lens, 90 is a concave groove, 90a is a light receiving unit, 90b Is a light receiving circuit unit, 91 is a light receiving lens, 91a is a dome-shaped condensing unit, 93 is a pyroelectric element, 93a and 93b are pyroelectric electrodes, 100 is a microcomputer control unit, 111 is an operation board circuit control means, and 112 is a liquid crystal Panel drive control means, 114 is LED drive means, 115 is Heat output control means such as a work coil, C1 is a first work coil, C2 is a second work coil, C3 is a third work coil, G1 is a first induction heating part, G2 is a second induction heating part, G3 is a third induction heating unit, MS is a human sensor, and IS is a tilt sensor.

Claims (3)

An inner pot, a rice cooker main body that stores the inner pot in a removable manner, an inner pot heating means that heats the stored inner pot inside the rice cooker main body, and an upper portion of the rice cooker main body that can be opened and closed. includes a lid body provided, and a human sensor that detects the presence of a person in, electricity according to a detection result of the human sensor, ing so as to control the rice cooker main body in a predetermined state It is a rice cooker, and the human sensor is located in the front part of the lid body, deviated to either the left or right side, and in the front-rear direction with respect to the steam port provided on the rear side of the lid body An electric rice cooker characterized by being provided at a position that does not correspond . Motion sensor is an electric rice cooker according to claim 1, characterized in that are provided corresponding to the lower portion of the operation portion. The human sensor is a pyroelectric sensor, and the sensor unit includes a plurality of pyroelectric electrodes having a predetermined length parallel to each other, and the plurality of pyroelectric electrodes are adapted to detect the movement of a person to be detected. electric cooker according to claim 1 or 2 Symbol mounting, characterized in that it is arranged to have a predetermined intersection angle Te.

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