JP2012178277A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an induction heating cooker provided with a heating chamber which can enhance safety in removal of heaters.SOLUTION: An induction heating cooker comprises: a box-like heating chamber; coils 6 each arranged detachably/attachably in the heating chamber and generating a high-frequency magnetic flux when a high-frequency current is supplied; an upper heater 10a and a lower heater 10b each generating an induction current to generate heat by the magnetic flux generated by the coil 6; a control part 17 causing, when removal of the upper heater 10a and the lower heater 10b is instructed through a heater removal button 18b, lock rods 20a, 20b to be engaged with the upper heater 10a and the lower heater 10b, respectively, to inhibit removal of the upper heater 10a and the lower heater 10b in the case where temperatures of the upper heater 10a and the lower heater 10b detected by a temperature sensor 16 exceed a predetermined temperature, and the lock rods 20a, 20b to move so as to allow removal of the upper heater 10a and the lower heater 10b in the case where the temperatures of the upper heater 10a and the lower heater 10b are equal to or below the predetermined temperature.

Description

  The present invention relates to an induction heating cooker, and more particularly to an induction heating cooker using an induction current heater as a heating source in a heating cabinet.

  Currently, system kitchens with built-in induction cookers are in widespread use. As such a built-in heating cooker, there is known a cooking device provided with a heating unit for heating a pan or a frying pan on the upper surface and a heating chamber such as a grill in the housing.

  Since the heating cooker becomes high temperature after heating, a technique for prompting the user to pay attention has been proposed. As such a heating cooker, “a heated object is placed on a plate, and a temperature sensor that detects the temperature of the plate and that the plate is hot is displayed. And a display control means for switching the display mode of the display unit in accordance with the temperature detected by the temperature sensor "(for example, see Patent Document 1).

JP-A-5-52354 (pages 2 to 4)

  In the conventional induction heating cooker described in the above-mentioned Patent Document 1, a warning is given that the plate is hot, but only the high temperature warning is given to the plate, and the heating chamber is not considered.

  In a heating chamber such as a grill, fish and meat are often baked, and there are many oil splashes, so there is a high demand for cleaning the heating chamber. However, when removing the heater in order to clean the inside of the heating chamber or the heater, it has been desired to obtain a mechanism for improving safety so as not to touch the high-temperature heating chamber or the heater.

  This invention is made | formed in order to solve the above subjects, and provides the induction heating cooking appliance provided with the heating chamber which can improve the safety | security at the time of heater removal.

  An induction heating cooker according to the present invention includes a box-shaped heating chamber, a coil that is supplied with a high-frequency current to generate a high-frequency magnetic flux, and is detachably disposed inside the heating chamber, and the induction current is generated by the magnetic flux generated from the coil. A heater that generates heat and generates heat, a temperature detection unit that detects the temperature of the heater, an operation unit for instructing the removal of the heater, and a removal prevention unit that prevents the heater from being removed from the heating chamber And, when the heater is instructed to be removed by the operation section, if the temperature of the heater is equal to or lower than a predetermined temperature, the controller prevents the removal preventing function of the removal preventing means and enables the heater to be removed. It is equipped with.

  According to the present invention, when the heater is instructed to be removed by the operation unit, the heater is prevented from being removed if the temperature of the heater detected by the temperature detecting means exceeds a predetermined temperature. Safety can be increased.

2 is a schematic cross-sectional view of a heating chamber according to Embodiment 1. FIG. It is a figure explaining the heater of the heating store | warehouse | chamber which concerns on Embodiment 1. FIG. 3 is a schematic cross-sectional view of the main part of the heating chamber according to Embodiment 1. FIG. It is a perspective view of the principal part explaining the heater removal locking mechanism which concerns on Embodiment 1. FIG. 6 is a flowchart for explaining the operation of the detachment lock mechanism in the first embodiment. It is a cross-sectional schematic diagram of the principal part of the heating chamber which concerns on Embodiment 2. FIG. It is a front schematic diagram of the heating chamber according to the second embodiment. It is a figure explaining the structure regarding the movement of the lock rod concerning Embodiment 2. FIG. It is a cross-sectional schematic diagram of the principal part of the heating chamber which concerns on Embodiment 3. FIG. 10 is a perspective view of a main part for explaining a heater cover opening and closing mechanism according to Embodiment 3. FIG. 10 is a flowchart for explaining an opening / closing operation of a heater cover according to a third embodiment. It is a figure explaining the modification of the heater cover which concerns on Embodiment 3, and is a cross-sectional schematic diagram of the principal part of a cooking chamber. FIG. 10 is a perspective view of a main part for explaining a modification of the heater cover according to Embodiment 3. It is a cross-sectional schematic diagram of the principal part of the heating chamber which concerns on Embodiment 4. FIG. It is a front schematic diagram of the heating chamber according to the fourth embodiment. It is a figure explaining the opening / closing structure of the heater cover which concerns on Embodiment 4. FIG. It is a cross-sectional schematic diagram of the principal part of the heating chamber which concerns on Embodiment 5. FIG. FIG. 10 is a perspective view of a main part for explaining a heater moving mechanism according to a fifth embodiment. 10 is a flowchart for explaining a heater moving operation according to the fifth embodiment. It is a cross-sectional schematic diagram of the main part of the heating chamber according to the sixth embodiment. It is a perspective view of the principal part explaining the heater moving mechanism which concerns on Embodiment 6. FIG. It is a perspective view of the principal part of the heating chamber which concerns on Embodiment 7. FIG.

Embodiment 1 FIG.
The heating cabinet of the first embodiment is provided in a so-called IH cooking heater that heats a pan or the like placed on a top plate by an induction heating coil, a heating cooker such as an microwave oven, an oven toaster, etc. Is to do.
1 is a schematic cross-sectional view of a heating chamber according to Embodiment 1. FIG. FIG. 2 is a diagram illustrating the heater of the heating chamber according to the first embodiment. In addition, the magnitude | size and positional relationship of each structure shown in drawing including FIG. 1, FIG. 2 may differ from an actual thing. For the sake of explanation, the direction corresponding to the left side of FIG. 1 is “front”, the direction corresponding to the right side of the page is “back”, the direction corresponding to the upper side of the page is “up”, and the direction corresponding to the lower side of the page is Sometimes referred to as “lower”.

  As shown in FIG. 1, the heating chamber 1 includes an upper wall 2a, a lower wall 2b (bottom surface), a rear wall 5 extending in the vertical direction, and side walls 3 on both the left and right sides extending in the vertical direction (in FIG. Only the side wall 3 is shown). On the front surface of the heating chamber 1, there is provided a front door 4 that is partly made of glass so that it can be opened and closed and the inside during cooking can be observed. Inside the heating chamber 1, a removable upper heater 10 a and a lower heater 10 b made of a loop-shaped conductor, a coil 6 disposed on the rear wall 5 of the heating chamber 1, and an arrangement adjacent to the coil 6 are arranged. And a magnetic body 7 such as a ferrite core made of the magnetic material. Moreover, on the lower wall 2b of the heating chamber 1, a receiving tray 13 for receiving fat and the like from the food material X to be heated, and a grill 14 for placing the food material X are provided. Moreover, the operation part 18 and the alerting | reporting part 19 are provided in the upper part of the heating cooker, and the temperature of the control part 17 which controls the whole operation | movement of a heating cooker, the upper heater 10a, and the lower heater 10b is provided in the inside. A temperature sensor 16 for detection is provided.

  The coil 6 is made of, for example, a so-called litz wire made of 19 stranded wires coated with a copper wire having a diameter of 0.3 mm with a resin or the like on a plane substantially parallel to the rear wall 5 (each corner is For example, it is formed by winding a plurality of times (25 times) into a curved rectangular shape or a substantially elliptical shape. The coil 6 is connected to a power supply circuit (not shown) that supplies a high-frequency current. By supplying a high-frequency current to the coil 6, these plural litz wires form a current (magnetic flux) in the same direction.

  The magnetic body 7 is arranged so as to surround a plurality of litz wires arranged so that currents flow in the same direction in a C-shaped cross section (see FIG. 1). In the first embodiment, two magnetic bodies 7 are arranged with respect to the upper heater 10a and the lower heater 10b. The magnetic body 7 can be formed using, for example, a magnetic material equivalent to a ferrite core usually used around a heating coil of a general IH cooking heater. By making the cross-sectional shape of the magnetic body 7 C-shaped, the temperature rise of the power feeding portions of the upper heater 10a and the lower heater 10b is reduced.

  A heat insulating member 8 is provided on the inner side of the C-shaped cross section of the magnetic body 7. The heat insulating member 8 can have, for example, a two-layer structure of a heat insulating material such as glass wool or ceramic wool and ceramics. The coil 6 has a structure sandwiched between the magnetic body 7 and the heat insulating member 8 at a portion facing the upper heater 10a and the lower heater 10b. The coil 6 and the magnetic body 7 are insulated from the high-temperature air inside the heating chamber 1 by the heat insulating member 8. In addition to the above configuration example, the heat insulating member 8 may be made of only ceramics, and an air layer or an air flow may be provided between the ceramics and the coil instead of the heat insulating material.

  The coil 6, the magnetic body 7, and the heat insulating member 8 configured as described above are arranged to be a part of the rear wall 5 of the heating chamber 1. In addition, the remaining wall surfaces (including the upper wall 2a and the lower wall 2b) of the heating chamber 1 are configured using a heat resistant material such as a metal such as iron or stainless steel, or an insulating material such as ceramic or glass. With such a configuration, the heating chamber 1 constitutes a housing that is closed by the upper wall 2a, the lower wall 2b, the front door 4, the rear wall 5, and the side walls 3 on both sides made of a heat-resistant material. In addition, it is desirable to give various coatings for the purpose of the antifouling effect and the far-infrared effect on the inner surfaces of the upper wall 2a, the lower wall 2b, and the like of the heating chamber 1.

  The upper heater 10a and the lower heater 10b constitute an electrically closed loop (closed circuit) interlinked with the high-frequency magnetic flux generated from the coil 6, and generate heat by Joule heat generated by the flow of current. It is a thing. The upper heater 10a and the lower heater 10b have the same configuration. The upper heater 10 a and the lower heater 10 b include a power feeding unit 11 and a heating unit 12. The upper heater 10a and the lower heater 10b constitute a closed loop (closed circuit) in which the power feeding unit 11 and the heating unit 12 are connected. The upper heater 10 a and the lower heater 10 b are formed by bending a loop-shaped member a plurality of times in the depth direction and the width direction of the heating chamber 1. Thus, the temperature distribution in the heating chamber 1 can be adjusted by bending a plurality of times in the depth direction and the width direction. The number and shape of bending of the upper heater 10a and the lower heater 10b are not limited to those illustrated.

The power feeding unit 11 is a part having a relatively low electrical resistance with respect to the heating unit 12. In addition, the level of the electrical resistance here is a relative level of the electrical resistance per unit length of the power feeding unit 11 and the heating unit 12.
For example, when the power feeding unit 11 and the heating unit 12 are made of the same metal, the power feeding unit 11 is made of a solid bar (solid bar), and the heating unit 12 is made of a pipe (hollow bar). Both can be connected by a method such as welding. Further, when both are made of different metals, the power feeding part 11 can be made of a metal having a low electric resistance such as copper, and the heating part 12 can be made of a metal having a high electric resistance such as stainless steel.
Moreover, you may produce the electric power feeding part 11 and the heating part 12 with a mutually different structure and material. For example, the power feeding part 11 is made of a solid bar made of copper or copper alloy having an outer diameter of 6 mm, and the heating part 12 is made of a stainless steel pipe (hollow bar) having an outer diameter of 6 mm and a radial thickness of 0.3 to 1 mm. These may be connected by welding or brazing.

  The upper heater 10a and the lower heater 10b are fitted and supported in a recessed power feeding portion support groove 9 extending in the horizontal direction of the heat insulating member 8. Moreover, the side wall 3 on both sides of the heating chamber 1 is provided with a heater support groove 15 into which the upper heater 10a and the lower heater 10b can be inserted in the depth direction (see FIG. 2). The side portions of 10a and the lower heater 10b are placed and supported. The upper heater 10 a and the lower heater 10 b are detachably fitted to the power feeding unit support groove 9 and the heater support groove 15. When the user opens the front door 4 and pulls the upper heater 10a and the lower heater 10b toward the front side, the upper heater 10a and the lower heater 10b can be attached to and detached from the heating chamber 1. Thus, since the upper heater 10a and the lower heater 10b can be removed from the inside of the heating chamber 1, the heaters and the inside of the heating chamber 1 can be more easily cleaned by removing them.

  The temperature sensor 16 is for detecting the temperature of the upper heater 10a and the lower heater 10b. The temperature sensor 16 is connected to the control unit 17 through a signal line, and outputs detected information to the control unit 17. As the temperature sensor 16, for example, a thermistor in which a temperature variable resistor is arranged inside a metal protective tube can be used. In this case, the temperature sensor 16 is attached to the wall surface of the heating chamber 1 and the thermistor is attached to the upper heater 10a and lower heater 10b side by a spring so that the surface of the thermistor can come into contact with the surfaces of the upper heater 10a and the lower heater 10b. Configured to be energized. Moreover, the temperature sensor 16 which enabled the detection of the air temperature in the heating chamber 1 may be provided, and the temperature of the upper heater 10a and the lower heater 10b may be estimated based on the detected air temperature. In addition to such a configuration, any configuration capable of detecting the temperatures of the upper heater 10a and the lower heater 10b can be employed.

  The operation unit 18 includes an input unit that receives an operation from the user, and outputs a signal corresponding to the operation of the user to the control unit 17 connected by a signal line. As the operation unit 18, for example, a touch panel, a push button, or the like can be used. The operation unit 18 according to the first embodiment includes a heating instruction button 18a as an operation unit for a user to input a heating instruction and thermal power, and an operation for instructing removal of the upper heater 10a and the lower heater 10b. A heater removal button 18b is provided as a part.

  The alerting | reporting part 19 is controlled by the control part 17 connected with the signal wire | line, and alert | reports information with respect to the operation state of a cooking-by-heating machine, or a user. As the notification unit 19, for example, a visual notification such as a liquid crystal screen or a lamp, or an auditory notification such as a speaker that emits a buzzer sound or a voice can be provided.

  In addition, in this Embodiment 1, although the example provided with the operation part 18 and the alerting | reporting part 19 on the upper surface side of a heating cooker is shown, arrangement | positioning of the operation part 18 and the alerting | reporting part 19 is not restricted to this, The operation part 18 and The notification unit 19 may be arranged on the front side of the heating cooker, or the operation unit 18 and the notification unit 19 may be arranged separately on the front side and the upper side. For example, when the heating chamber 1 according to Embodiment 1 is applied to a so-called IH cooking heater, the heating instruction button 18a can be provided on the top surface of the IH cooking heater, and the heater removal button 18b and the notification unit 19 can be provided on the front surface. For example, when arrange | positioning the heating instruction button 18a, the removal button 18b, and the alerting | reporting part 19 in the front side of a cooking-by-heating machine, these may be divided | segmented into the right and left of the heating chamber 1, and these may be arrange | positioned. 1 may be arranged together on either the left or right side. Not only what was illustrated here but the operation part 18 and the alerting | reporting part 19 can be made into arbitrary arrangement | positioning.

  The control unit 17 is composed of, for example, a microcomputer, CPU, DSP, or the like, and controls a heating operation by the upper heater 10a and the lower heater 10b in response to a signal from the heating instruction button 18a of the operation unit 18. The control unit 17 causes the notification unit 19 to output information related to the operation of the heating cooker. The control unit 17 receives an input from the heater removal button 18b and performs operation control related to removal of the upper heater 10a and the lower heater 10b.

Next, the heating operation by the upper heater 10a and the lower heater 10b will be described.
When the control unit 17 receives a heating start instruction from the heating instruction button 18 a of the operation unit 18, the control unit 17 drives a power supply circuit (not shown).
When a high frequency current of 20 to 100 kHz is supplied to the coil 6 from a power supply circuit (not shown), the coil current flows through the coil 6 and a high frequency magnetic flux is generated around the coil 6. The high-frequency magnetic flux generated from the coil 6 passes through the magnetic body 7 having a small magnetic resistance and is linked to the upper heater 10a and the lower heater 10b. At this time, an induced current is generated in the upper heater 10a and the lower heater 10b that are electrically closed (constituting a closed loop) due to the linked high-frequency magnetic flux, and Joule heat due to the induced current is generated in the upper heater 10a and the lower heater 10b. To do. Since the electric resistance of the heating part 12 of the upper heater 10a and the lower heater 10b is high, a larger Joule heat is generated in the heating part 12. And the foodstuff X in the heating chamber 1 can be heated with the radiant heat from the upper heater 10a and the lower heater 10b, and the high temperature air heated by the upper heater 10a and the lower heater 10b.

  Since the upper heater 10a and the lower heater 10b of the heating chamber 1 according to the first embodiment perform heating using the induction current as described above, for example, heating is performed like an electric heater such as a conventional sheathed heater or a radiant heater. Electrical wiring for the cabinet 1 is not necessary. Therefore, the upper heater 10a and the lower heater 10b can be easily detached from the heating chamber 1, and the inside of the heating chamber 1, the upper heater 10a, and the lower heater 10b itself can be easily cleaned.

The overall configuration of the heating chamber 1 has been described above. The configuration described so far is basically the same in the second and later embodiments described later.
Next, a removal locking mechanism for the upper heater 10a and the lower heater 10b in the first embodiment will be described. The removal lock mechanism corresponds to the heater removal prevention means of the present invention, and is a mechanism that prevents the upper heater 10a and the lower heater 10b from being pulled out.

FIG. 3 is a schematic cross-sectional view of the main part of the heating chamber according to the first embodiment, and FIG. 4 is a perspective view of the main part for explaining the heater removal locking mechanism according to the first embodiment.
As shown in FIGS. 3 and 4, the heating chamber 1 includes a columnar lock rod 20a, a lock rod 20b, and a lock rod moving motor 21 as a lock mechanism for removing the upper heater 10a and the lower heater 10b. .

  The lock rods 20a and 20b correspond to the engaging portions of the present invention, and are, for example, rod-shaped members made of metal having a relatively small calorific capacity and good heat dissipation. The lock rods 20a and 20b are inserted vertically in the loops of the upper heater 10a and the lower heater 10b formed in a loop shape. The lock rods 20a and 20b are disposed on the front side of a portion of the upper heater 10a and the lower heater 10b that extends in a direction intersecting the pulling direction. In the first embodiment, the lock rods 20a and 20b are positioned at the innermost part of the upper heater 10a and the lower heater 10b attached to the heating chamber 1, and are orthogonal to the drawing direction of the upper heater 10a and the lower heater 10b. It is located on the front side of the power feeding unit 11 that is a part.

  The lock bars 20a and 20b are attached so as to be movable in the vertical direction. The movement range of the lock rod 20a provided corresponding to the upper heater 10a is such that the lower end of the lock rod 20a is located below the lower surface of the upper heater 10a when the upper heater 10a is viewed from the side. The state where the lowest position, the lower end of the lock rod 20a is located above the upper surface of the upper heater 10a, is the highest position. Further, the movement range of the lock rod 20b provided corresponding to the lower heater 10b is such that the upper end of the lock rod 20b is located above the upper surface of the lower heater 10b when the lower heater 10b is viewed from the side. Is the uppermost position, and the state in which the upper end of the lock rod 20b is located below the lower surface of the lower heater 10b is the lowermost position. In FIGS. 3 and 4, the lock bar 20a positioned at the lowest position and the lock bar 20b positioned at the highest position are indicated by solid lines, and the lock bars 20a positioned at the highest position and the lock bars 20b positioned at the lowest position are broken lines. Is shown.

  The lock rod moving motor 21 is connected to the control unit 17 by a signal line, and is controlled by the control unit 17 to move the lock rods 20a and 20b in the vertical direction. The lock rod moving motor 21 corresponds to the engaging portion moving means of the present invention.

Next, an operation related to removal of the upper heater 10a and the lower heater 10b will be described.
First, including during heating by the upper heater 10a and the lower heater 10b, the lock rod 20a is at the lowest position and the lock rod 20b is at the uppermost position, and both engage with the upper heater 10a and the lower heater 10b, respectively. ing. When the lock rod 20a is at the lowest position and the lock rod 20b is at the highest position, even if the upper heater 10a and the lower heater 10b are pulled out to the near side, the lock rods 20a and 20b are caught by the power feeding section 11, and therefore the upper heater 10a The removal of the lower heater 10b is prevented.

Next, the operation for removing the upper heater 10a and the lower heater 10b will be described.
FIG. 5 is a flowchart for explaining the operation of the removal locking mechanism according to the first embodiment.
As shown in FIG. 5, when the heater removal button 18b is pressed and a heater removal signal is transmitted from the heater removal button 18b to the control unit 17 (S101; Yes), the control unit 17 includes the upper heater 10a and the lower heater. It is determined whether 10b is being heated (S102). If the upper heater 10a and the lower heater 10b are heating (S102; Yes), the notification unit 19 is controlled to notify that the unlocking of the heater cannot be unlocked by display or sound (S105). In addition to or instead of notifying that the unlocking of the heater removal is impossible in this step S105, a warning to the effect that the upper heater 10a and the lower heater 10b are being heated is notified. May be.

If the upper heater 10a and the lower heater 10b are not being heated (S102; No), the control unit 17 is based on a signal from the temperature sensor 16 so that the temperatures of the upper heater 10a and the lower heater 10b can be improved. It is determined whether the temperature is equal to or lower than a predetermined temperature (for example, 37 ° C. to 40 ° C.) (S103). If the upper heater 10a and the lower heater 10b are below the predetermined temperature (S103; Yes), the control unit 17 drives the lock rod moving motor 21 to move the lock rod 20a to the top and the lock rod 20b to the bottom. By doing so, the heater removal lock is released (S104). If it does in this way, the user can remove the upper heater 10a and the lower heater 10b from the heating chamber 1 by pulling out the upper heater 10a and the lower heater 10b to the near side. In step S104, the user may be notified that the heater removal lock has been released or that the inside of the heating chamber 1 has become a predetermined temperature or lower.
If the upper heater 10a and the lower heater 10b are not below the predetermined temperature (S103; No), it is notified that the unlocking of the heater removal is impossible (S105). In addition to or instead of notifying that the unlocking of the heater removal is impossible in this step S105, an alert to the effect that the upper heater 10a and the lower heater 10b are at a high temperature is notified. Also good.

The setting of the heater removal lock, that is, the operation of moving the lock rod 20a to the lowest position and moving the lock rod 20b to the highest position is performed after the upper heater 10a and the lower heater 10b are installed in the heating chamber 1. It can be performed at any timing. Furthermore, heating by the upper heater 10a and the lower heater 10b may be enabled only when the lock rod 20a is at the lowest position and the lock rod 20b is at the highest position.
Whether or not the upper heater 10a and the lower heater 10b are attached in the heating chamber 1 may be determined based on the detection result by incorporating a weight sensor in the heater support groove 15, for example. . Further, when a predetermined input voltage is applied to the coil 6, the value of the current flowing through the coil 6 varies depending on whether or not there is a load (upper heater 10a, lower heater 10b). The presence or absence of the heater 10b may be determined.

  As described above, according to the first embodiment, the upper heater 10a and the lower heater 10b cannot be removed from the heating chamber 1 until the temperature is lowered to a predetermined temperature for further safety. Safety at the time of removing 10a and the lower heater 10b can be improved.

In the first embodiment, cylindrical lock rods 20a and 20b are shown as an example of a removal lock mechanism that is inserted into the loop of the upper heater 10a and the lower heater 10b and prevents the upper heater 10a and the lower heater 10b from being pulled out. However, for example, a prism or a plate member may be used.
In the first embodiment, an example in which the upper heater 10a and the lower heater 10b are provided on the upper and lower sides in the heating chamber 1 is shown. However, only one of the upper heater and the lower heater is provided in the heating chamber. There may be.
Moreover, although the example which moves lock bar | burr 20a, 20b to an up-down direction was shown, you may make it rotate and engage and disengage with the upper heater 10a and the lower heater 10b.

Embodiment 2. FIG.
In the first embodiment, the lock rods 20a and 20b are moved up and down by the lock rod moving motor 21. In the second embodiment, another configuration example for moving the lock bars 20a and 20b up and down will be described. In the second embodiment, differences from the first embodiment will be mainly described, and the same or corresponding components as those in the first embodiment are denoted by the same reference numerals.

FIG. 6 is a schematic cross-sectional view of the main part of the heating chamber according to the second embodiment. FIG. 7 is a schematic front view of the heating chamber according to the second embodiment. FIG. 7A shows a state in which the heater removal lever 23 is pushed up, and FIG. 7B shows that the heater removal lever 23 is pushed down. It shows the state. For convenience of explanation, FIG. 7 does not show the front door 4.
As shown in FIGS. 6 and 7, a heater removal lever 23 is provided beside the opening on the front side of the heating chamber 1. The heater removal lever 23 is provided inside the front door 4, and the heater removal lever 23 is exposed by opening the front door 4. In the second embodiment, an example in which the heater removal lever 23 is provided inside the front door 4 will be described, but the arrangement of the heater removal lever 23 is not limited to this. For example, it can be provided beside the front opening of the heating chamber 1 and outside the front door 4 (a position not covered by the front door 4). Further, the heater removal lever 23 can be arranged at a position other than the front surface so that it is difficult for the user to operate by mistake, and the heater removal lever 23 can be arranged at an arbitrary position.

  The heater removal lever 23 can be moved in the vertical direction by being pushed down or pushed up by the user. When the heater removal lever 23 is pushed up as shown in FIG. 7A, the lock rod 20a is positioned at the lowest position and the lock rod 20b is positioned at the highest position, and the heater as shown in FIG. 7B. In a state where the removal lever 23 is pushed down, the lock bar 20a is positioned at the uppermost position and the lock bar 20b is positioned at the lowermost position. Thus, in conjunction with the movement of the heater removal lever 23, the lock bars 20a and 20b move up and down. In the second embodiment, the lock rod moving motor in the first embodiment is not provided.

Next, an example of a structure for moving the lock bars 20a and 20b by operating the heater removal lever 23 will be described. FIG. 8 is a diagram illustrating a structure related to the movement of the lock bars 20a and 20b according to the second embodiment.
As shown in FIG. 8, the lock rods 20 a and 20 b have a connecting portion 29 c that extends substantially horizontally toward the back side with respect to the plate-like support plate 29 a that is disposed substantially horizontally on the back side of the heating chamber 1. Are connected through. The support plate 29a can move up and down, and the lock bars 20a and 20b move up and down as the support plate 29a moves up and down.

  A support bar 29b extends from the side surface of the support plate 29a toward the side. The support bar 29b connected to the lock bar 20a is slidably inserted into an inclined groove 28a1 formed in the upper guide rail 28a, and the support bar 29b connected to the lock bar 20b is inclined to the lower guide rail 28b. The groove 28b1 is slidably inserted. The inclined grooves 28a1 and 28b1 are inclined so as to increase from the near side toward the far side. The front end portions of the upper guide rail 28a and the lower guide rail 28b are connected to rod-shaped upper arms 27a and lower arms 27b extending in the depth direction, respectively. The upper arm 27a and the lower arm 27b are connected to the arm connecting plate 26 at their front end portions.

  The arm connecting plate 26 is a substantially T-shaped plate-like member in which the upper arm 27a and the lower arm 27b are connected on the upper and lower sides of the rear side and the heater removing lever 23 is connected on the front side. The arm connecting plate 26 has a function of connecting the upper arm 27a and the lower arm 27b and connecting the heater removal lever 23 thereto. The arm connecting plate 26 is formed with a locking hole 26a into which the rod-shaped lever lock 24 can be inserted. In addition, a pivot shaft 26b is provided at a substantially middle point of the connecting portion of the arm connecting plate 26 with the upper arm 27a and the lower arm 27b. The rotation shaft 26b is rotatably fitted in a rotation hole (not shown) provided on the heating chamber 1 side. In accordance with the push-up / push-down operation of the heater removal lever 23, the arm connecting plate 26 rotates by a predetermined angle about the rotation shaft 26b.

  The lever lock 24 is attached to the heating chamber 1 so as to be movable in the left-right direction. By moving, the lever lock 24 is inserted into / removed from the locking hole 26a of the arm connecting plate 26. When the lever lock 24 is inserted into the locking hole 26a of the arm connecting plate 26, the heater removal lever 23 cannot be pushed down. Further, a lever lock motor 25 connected to the control unit 17 by a signal line is provided, and the lever lock 24 is moved in the left-right direction by the lever lock motor 25.

  When the heater lock lever 23 is pushed down (arrow T2 in FIG. 8) while the lever lock 24 is removed from the locking hole 26a (arrow T1 in FIG. 8), the arm connecting plate 26 has a predetermined axis about the rotating shaft 26b. Rotate by an angle. Accordingly, the upper arm 27a moves to the near side (arrow T3 in FIG. 8), and the lower arm 27b moves to the rear side (arrow T4 in FIG. 8). As the upper arm 27a moves, the upper guide rail 28a moves to the near side, and is guided by the inclined groove 28a1 of the upper guide rail 28a to move the support bar 29b upward (arrow T5 in FIG. 8). By such movement of the support rod 29b, the lock rod 20a connected to the support rod 29b via the support plate 29a also moves upward (arrow T7 in FIG. 8). Further, the lower guide rail 28b is moved to the back side by the movement of the lower arm 27b, and the support bar 29b is moved downward by being guided by the inclined groove 28b1 of the lower guide rail 28b (arrow T6 in FIG. 8). By such movement of the support rod 29b, the lock rod 20b coupled to the support rod 29b via the support plate 29a also moves downward (arrow T8 in FIG. 8). In this way, the operating force for the heater removal lever 23, which is an operation member that accepts an operation in the downward direction, is the arm connecting plate 26, the upper arm 27a (lower arm 27b), the upper guide rail 28a (lower guide rail 28b), and the support. It is transmitted to the lock rod 20a (lock rod 20b) as a moving force in the vertical direction by a transmission member comprising the rod 29b and the connecting portion 29c.

Next, an operation related to removal of the upper heater 10a and the lower heater 10b will be described.
First, including during heating by the upper heater 10a and the lower heater 10b, the lock rod 20a is at the lowest position and the lock rod 20b is at the uppermost position, so that the upper heater 10a and the lower heater 10b are pulled out to the near side. However, the lock rods 20a and 20b are caught by the power feeding unit 11 and the upper heater 10a and the lower heater 10b cannot be removed. Further, the lever lock 24 is inserted into the locking hole 26a of the arm connecting plate 26, and the heater removal lever 23 cannot be pushed down. That is, since the heater removal lever 23 cannot be pushed down, even if the upper heater 10a and the lower heater 10b are about to be pulled out, the lock rods 20a and 20b are caught by the power feeding unit 11 and the upper heater 10a, Removal of the lower heater 10b is prevented.

Next, the operation for removing the upper heater 10a and the lower heater 10b will be described. Here, the operation of the removal locking mechanism according to the second embodiment will be described using the flowchart shown in FIG. 5 in the first embodiment.
In FIG. 5, the operations in steps S101 to S103 and step S105 are the same as those in the first embodiment.

  The second embodiment is different from the first embodiment in the operation in step S104. That is, if the upper heater 10a and the lower heater 10b are equal to or lower than the predetermined temperature (S103; Yes), the control unit 17 drives the lever lock motor 25 to connect the lever lock 24 to the locking hole 26a of the arm connecting plate 26. It moves to the state pulled out from (S104). At this time, the control unit 17 controls the notification unit 19 so that the heater removal lever 23 can be operated, and the temperature in the heating chamber 1 is a predetermined temperature for further improving safety. Either or both can be notified. When the user pushes down the heater removal lever 23, the lock rod 20a moves to the uppermost position and the lock rod 20b moves to the lowermost position. Furthermore, the user can remove the upper heater 10a and the lower heater 10b from the heating chamber 1 by pulling the upper heater 10a and the lower heater 10b to the front side.

  The setting of the heater removal lock, that is, the operation of inserting the lever lock 24 into the locking hole 26a can be performed at an arbitrary timing after the upper heater 10a and the lower heater 10b are attached in the heating chamber 1. .

  As described above, even when the lock rods 20a and 20b are mechanically moved up and down by operating the heater removal lever 23 as in the second embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG.
In the first and second embodiments, the heater removal lock mechanism is provided so that the upper heater 10a and the lower heater 10b cannot be removed until the temperature is lower than a predetermined temperature, thereby improving the safety when removing the heater. In the third embodiment, an example in which the front side of the upper heater 10a and the lower heater 10b is covered with a heater cover so that the upper heater 10a and the lower heater 10b cannot be removed until the temperature becomes a predetermined temperature or lower is shown. In the third embodiment, differences from the first embodiment will be mainly described, and the same or corresponding components as those in the first embodiment are denoted by the same reference numerals.

FIG. 9 is a schematic cross-sectional view of the main part of the heating chamber according to the third embodiment, and FIG. 10 is a perspective view of the main part for explaining the opening / closing mechanism of the heater cover according to the third embodiment. The heater cover opening / closing mechanism corresponds to the heater removal prevention means of the present invention, and is a mechanism that covers the upper heater 10a and the lower heater 10b so that the user cannot touch them.
As shown in FIGS. 9 and 10, a flat heater cover 30a, a heater cover 30b, and a cover moving motor 31 are provided on the front door 4 side of the upper heater 10a and the lower heater 10b.

  The heater covers 30 a and 30 b cover the front side of the upper heater 10 a and the lower heater 10 b in the heating chamber 1. The heater covers 30a and 30b are configured to have a relatively small heat capacity and good heat dissipation, such as a metal mesh structure or a lattice shape. Thereby, the fall of the temperature of the heater cover 30 is accelerated | stimulated, and since it falls to safe temperature earlier, the heater cover 30 with a more effective effect can be provided. In this case, the mesh structure and the lattice-like gaps of the heater covers 30a and 30b are preferably fine gaps that do not allow the user's fingers or the like to pass. Further, the heater covers 30a and 30b can be configured by plate-like members having no mesh structure or the like. In this case, since the structure is simple, the heater covers 30a and 30b can be manufactured at low cost, and the productivity is high.

  The heater covers 30a and 30b are provided so as to be movable in the vertical direction. The range of movement of the heater cover 30a provided on the upper side corresponding to the upper heater 10a is such that when the upper heater 10a is viewed from the side, the lower end of the heater cover 30a is equal to or lower than the lower surface of the upper heater 10a. The state where the lower end of the heater cover 30 is located above the upper surface of the upper heater 10a is the highest. The range of movement of the heater cover 30b provided on the lower side corresponding to the lower heater 10b is such that the upper end of the heater cover 30b is the same as the upper surface of the lower heater 10b when the lower heater 10b is viewed from the side. The state having the above height is the top, and the state in which the upper end of the heater cover 30b is located below the lower surface of the lower heater 10b is the bottom. Therefore, when the heater cover 30a is positioned at the lowest position and the heater cover 30b is positioned at the highest position, the front side of the upper heater 10a and the lower heater 10b is covered by the heater covers 30a and 30b. When the heater cover 30a is positioned at the uppermost position and the heater cover 30b is positioned at the lowermost position, the upper heater 10a and the lower heater 10b are exposed.

  The cover moving motor 31 is connected to the control unit 17 by a signal line, and is controlled by the control unit 17 to move the heater cover 30 movably mounted in the vertical direction in the vertical direction.

Next, the opening / closing operation of the heater covers 30a and 30b will be described.
First, the heater cover 30a is at the lowest position and the heater cover 30b is at the highest position, including during heating by the upper heater 10a and the lower heater 10b, and the front side of the upper heater 10a and the lower heater 10b is the heater cover 30a. , 30b. Therefore, when the upper heater 10a and the lower heater 10b are at a high temperature, it is possible to prevent the user's hand and fingers from accidentally contacting the upper heater 10a and the lower heater 10b.

Next, the operation for removing the upper heater 10a and the lower heater 10b will be described.
FIG. 11 is a flowchart illustrating the opening / closing operation of the heater cover according to the third embodiment.
As shown in FIG. 11, when the heater removal button 18b is pressed and a heater removal signal is transmitted from the heater removal button 18b to the control unit 17 (S201; Yes), the control unit 17 includes the upper heater 10a and the lower heater. It is determined whether 10b is being heated (S202). If the upper heater 10a and the lower heater 10b are being heated (S202; Yes), the notification unit 19 is controlled to notify that the heater covers 30a and 30b cannot be opened by display or sound (S205). . In addition to or in place of notifying that the heater covers 30a and 30b cannot be opened in step S205, an alert to the effect that the upper heater 10a and the lower heater 10b are being heated is notified. You may do it.

If the upper heater 10a and the lower heater 10b are not being heated (S202; No), the control unit 17 is based on a signal from the temperature sensor 16 so that the temperatures of the upper heater 10a and the lower heater 10b are further improved. It is determined whether the temperature is equal to or lower than a predetermined temperature (for example, 37 ° C. to 40 ° C.) (S203). If the upper heater 10a and the lower heater 10b are below the predetermined temperature (S203; Yes), the control unit 17 drives the cover moving motor 31 to move the heater cover 30a to the top and the heater cover 30b to the bottom. (S204). In this way, the upper heater 10a and the lower heater 10b are exposed, and the user can pull out the upper heater 10a and the lower heater 10b to the front side and remove them from the heating chamber 1. In step S204, the user may be notified that the heater covers 30a and 30b have been opened or that the inside of the heating chamber 1 has become a predetermined temperature or lower.
If the upper heater 10a and the lower heater 10b are not below the predetermined temperature (S203; No), it is notified that the heater covers 30a and 30b cannot be opened (S205). In addition to or in place of notifying that the heater covers 30a and 30b cannot be opened in step S105, an alert to the effect that the upper heater 10a and the lower heater 10b are at a high temperature is notified. It may be.

  In addition, the operation | movement which closes heater cover 30a, 30b can be performed at arbitrary timings after the upper heater 10a and the lower heater 10b are attached in the heating chamber 1. Furthermore, heating by the upper heater 10a and the lower heater 10b may be enabled only when the heater covers 30a and 30b are closed.

  As described above, according to the third embodiment, the front side of the upper heater 10a and the lower heater 10b is covered with the heater covers 30a and 30b, and the temperature of the upper heater 10a and the lower heater 10b is a predetermined value for improving safety. Since it was set as the structure which cannot be removed from the heating chamber 1 until it falls to temperature, the safety | security at the time of removal of the upper heater 10a and the lower heater 10b can be improved.

Next, another configuration example of the heater cover will be described.
FIG. 12 is a diagram illustrating a modification of the heater cover according to Embodiment 3, and is a schematic cross-sectional view of the main part of the cooking chamber. FIG. 13 is a perspective view of a main part for explaining a modified example of the heater cover according to the third embodiment.
The heater cover 32a and the heater cover 32b shown in FIGS. 12 and 13 are configured to be rotated by a rotation shaft provided in the longitudinal direction to cover or expose the upper heater 10a and the lower heater 10b. The operation of the heater covers 32a and 32b is the same as that described with reference to FIG. Even if comprised in this way, the effect similar to the above can be acquired.

Embodiment 4 FIG.
In the third embodiment, the heater covers 30 a and 30 b are moved up and down by the cover moving motor 31. In the fourth embodiment, another configuration example for moving the heater covers 30a and 30b will be described. In the fourth embodiment, differences from the third embodiment will be mainly described, and the same or corresponding components as those in the third embodiment are denoted by the same reference numerals.

FIG. 14 is a schematic cross-sectional view of the main part of the heating chamber according to the fourth embodiment. 15A and 15B are schematic front views of the heating chamber according to the fourth embodiment. FIG. 15A shows a state where the heater removal lever 33 is pushed up, and FIG. 15B shows that the heater removal lever 33 is pushed down. It shows the state. For convenience of explanation, FIG. 15 does not show the front door 4.
As shown in FIGS. 14 and 15, a heater removal lever 33 is provided beside the opening on the front side of the heating chamber 1. The heater removal lever 33 is provided inside the front door 4, and the heater removal lever 33 is exposed by opening the front door 4. In the fourth embodiment, an example in which the heater removal lever 33 is provided inside the front door 4 will be described, but the arrangement of the heater removal lever 33 is not limited to this. For example, it can be provided beside the front opening of the heating chamber 1 and outside the front door 4 (a position not covered by the front door 4). Further, the heater removal lever 33 can be arranged at a position other than the front face so that the user is not easily operated by mistake, and the heater removal lever 33 can be arranged at an arbitrary position.

  The heater removal lever 33 can be moved in the vertical direction by being pushed down or pushed up by the user. In conjunction with the movement of the heater removal lever 33, the heater covers 30a and 30b move up and down. In the fourth embodiment, the cover moving motor in the third embodiment is not provided.

Next, an example of a structure for opening and closing the heater covers 30a and 30b by operating the heater removal lever 33 will be described. FIG. 16 is a diagram illustrating a heater cover opening / closing structure according to the fourth embodiment.
The basic mechanism of the moving structure of the heater covers 30a and 30b shown in FIG. 16 is the same as that shown in FIG. 8 of the second embodiment. In FIG. 16, the same components as those in FIG. 8 are denoted by the same reference numerals.

  As shown in FIG. 16, each of the heater covers 30a and 30b is connected to the support plate 29a via a connecting portion 29d. The connecting portion 29d connects the support plate 29a disposed on the back side of the heating chamber 1 and the heater covers 30a and 30b disposed on the near side of the heating chamber 1 to connect the inside of the upper wall 2a of the heating chamber 1 ( It extends in the depth direction of the lower wall 2b). Other configurations and operations are the same as those in FIG. 8 described above, and the heater covers 30a and 30b are opened when the heater removal lever 33 is pushed down with the lever lock 24 removed from the locking hole 26a. In this way, the operating force for the heater removal lever 33, which is an operation member that receives an operation in the downward direction, is the arm connecting plate 26, the upper arm 27a (the lower arm 27b), the upper guide rail 28a (the lower guide rail 28b), and the support. The transmission member including the rod 29b and the connecting portion 29d transmits the moving force in the vertical direction to the heater cover 30a (heater cover 30b).

Next, the opening operation of the heater covers 30a and 30b will be described.
First, the heater cover 30a is at the lowest position and the heater cover 30b is at the highest position, including during heating by the upper heater 10a and the lower heater 10b, and the front side of the upper heater 10a and the lower heater 10b is the heater cover 30a. , 30b. Further, since the lever lock 24 is inserted into the locking hole 26a of the arm connecting plate 26 and the heater removal lever 23 cannot be pushed down, the opening of the heater covers 30a, 30b is prevented. Therefore, when the upper heater 10a and the lower heater 10b are at a high temperature, it is possible to prevent the user's hand and fingers from accidentally contacting the upper heater 10a and the lower heater 10b.

Next, the operation for removing the upper heater 10a and the lower heater 10b will be described. Here, the heater cover opening operation according to the fourth embodiment will be described using the flowchart shown in FIG. 11 in the third embodiment.
In FIG. 11, the operations in steps S201 to S203 and step S205 are the same as those in the third embodiment.
The fourth embodiment differs from the third embodiment in the operation in step S204. That is, if the upper heater 10a and the lower heater 10b are equal to or lower than the predetermined temperature (S203; Yes), the control unit 17 drives the lever lock motor 25 to connect the lever lock 24 to the locking hole 26a of the arm connecting plate 26. It moves to the state pulled out from (S204). At this time, the control unit 17 controls the notification unit 19 so that the heater removal lever 33 can be operated, and that the temperature in the heating chamber 1 is a predetermined temperature for further safety. Either or both can be notified. When the user depresses the heater removal lever 33, the heater cover 30a moves to the uppermost position and the heater cover 30b moves to the lowermost position. In this way, the upper heater 10a and the lower heater 10b are exposed, and the user can pull out the upper heater 10a and the lower heater 10b to the front side and remove them from the heating chamber 1.

  The setting of the heater removal lock, that is, the operation of inserting the lever lock 24 into the locking hole 26a can be performed at an arbitrary timing after the upper heater 10a and the lower heater 10b are attached in the heating chamber 1. .

  As described above, even when the heater covers 30a and 30b are mechanically moved up and down by operating the heater removal lever 23 as in the fourth embodiment, the same effect as in the third embodiment can be obtained.

Embodiment 5 FIG.
In the first to fourth embodiments, the safety at the time of removing the heater is improved by configuring the upper heater 10a and the lower heater 10b so as not to be removed until the temperature becomes a predetermined temperature or lower. In the fifth embodiment, an example in which a heater moving mechanism is provided that moves the upper heater 10a and the lower heater 10b to the near side and improves the ease of taking out the upper heater 10a and the lower heater 10b by the user. In the third embodiment, differences from the first embodiment will be mainly described, and the same or corresponding components as those in the first embodiment are denoted by the same reference numerals.

FIG. 17 is a schematic cross-sectional view of the main part of the heating chamber according to the fifth embodiment, and FIG. 18 is a perspective view of the main part illustrating the heater moving mechanism according to the fifth embodiment. The heater moving mechanism corresponds to the heater removal preventing means of the present invention. When the upper heater 10a and the lower heater 10b are below a predetermined temperature, both heaters are moved in the take-out direction, but when the predetermined temperature is exceeded. Is a mechanism that prevents both heaters from moving.
As shown in FIGS. 17 and 18, an extruding portion 40 and an extruding portion moving motor 41 are provided in the vicinity of the upper heater 10a and the lower heater 10b. Moreover, the door detection means 42 which detects the opening / closing state of the front door 4 is provided.

  The extruding unit 40 has a function of pushing the upper heater 10 a and the lower heater 10 b placed in the power feeding unit support groove 9 and the heater support groove 15 in the heating chamber 1 to the front side of the heating chamber 1. The extrusion unit 40 of the fifth embodiment includes a rotating shaft 40a provided in a direction orthogonal to the pulling direction (the depth direction of the heating chamber 1) of the upper heater 10a and the lower heater 10b, and a radial direction from the rotating shaft 40a. And an extrusion bar 40b attached so as to protrude outward. The extrusion bar 40b is inserted into the back side of the portion of the upper heater 10a and the lower heater 10b formed in a loop shape and extending in the direction intersecting the pulling direction, and is locked to the upper heater 10a and the lower heater 10b. In the fifth embodiment, an example in which the push bar 40b is inserted into the back side of the horizontal portions 10a1 and 10b1 (see FIG. 18), which are a part of the upper heater 10a and the lower heater 10b bent a plurality of times in the width direction. Although shown, you may insert the extrusion bar 40b in the back | inner side etc. of the electric power feeding part 11. FIG.

  The pushing unit moving motor 41 is connected to the control unit 17 by a signal line, and is controlled by the control unit 17 to rotate the rotating shaft 40a.

  In a normal state, that is, in a state where the upper heater 10a and the lower heater 10b are placed in the power feeding portion support groove 9 and the heater support groove 15, the push bar 40b is as shown by a solid line in FIGS. In this state, the upper heater 10a and the lower heater 10b are inserted inside the loop.

  When the upper heater 10a and the lower heater 10b are removed, the rotation shaft 40a is rotated by driving the pushing portion moving motor 41 (see the arrow Y1 in FIGS. 17 and 18), and the pushing bar 40b is also rotated accordingly. To do. Thereby, the push bar 40b pushes the portion where the upper heater 10a and the lower heater 10b are locked, and moves the upper heater 10a and the lower heater 10b (see arrow Y2 in FIGS. 17 and 18). The push bar 40b rotates until it is substantially horizontal, and in this process, the engaged state with the upper heater 10a and the lower heater 10b is released. The extruded bar 40b after rotation is shown by broken lines in FIGS. When the upper heater 10a and the lower heater 10b move, the power feeding unit 11 comes out of the power feeding unit support groove 9, but the side portions of the upper heater 10a and the lower heater 10b are placed in the heater support groove 15, and therefore the upper heater 10a. The lower heater 10b does not fall. Further, the moving distance D1 of the upper heater 10a and the lower heater 10b may be a distance where a part of the upper heater 10a and the lower heater 10b protrudes from the front opening of the heating chamber 1. Preferably, the moving distance D1 is a length that allows the user to grasp the protruding portions of the upper heater 10a and the lower heater 10b with his / her hand. By doing so, the user can move the upper heater 10a and the lower heater 10b. Can be easily taken out. The rotation direction of the rotation shaft 40a is a direction in which the upper heater 10a and the lower heater 10b are sent to the front door 4 side. The rotation shaft 40a provided corresponding to the upper heater 10a is clockwise and corresponds to the lower heater 10b. The provided rotating shaft 40a rotates counterclockwise.

  After the upper heater 10a and the lower heater 10b are removed, the push bar 40b rotates in the direction opposite to the direction indicated by the arrow Y1 in FIGS. 17 and 18 and becomes substantially horizontal. The extrusion bar 40b at this time is shown by broken lines in FIGS. In this state, the upper heater 10 a and the lower heater 10 b are inserted into the heating chamber 1 and placed in the power feeding unit support groove 9 and the heater support groove 15. Since the extrusion bar 40b is substantially horizontal, the extrusion bar 40b does not hinder the attachment of the upper heater 10a and the lower heater 10b.

  After the upper heater 10a and the lower heater 10b are attached, the push bar 40b rotates in the direction indicated by the arrow Y1 in FIGS. 17 and 18, and is in the state indicated by the solid line in FIGS.

  The door detection means 42 is for detecting whether or not the front door 4 is opened and pulled out by a predetermined distance D2, and is constituted by, for example, a limit switch. Here, the predetermined distance D2 is a distance that is equal to or larger than the moving distance D1 in which the upper heater 10a and the lower heater 10b move by the rotation of the extrusion bar 40b. The door detection unit 42 is connected to the control unit 17 through a signal line, and outputs the detected information to the control unit 17.

Next, operations related to the movement of the upper heater 10a and the lower heater 10b will be described.
First, the extrusion bar 40b is locked to the upper heater 10a and the lower heater 10b at normal times, including during heating by the upper heater 10a and the lower heater 10b. Therefore, even if the upper heater 10a and the lower heater 10b are pulled out to the front side, the push bar 40b is caught by the horizontal portions 10a1 and 10b1, and the removal of the upper heater 10a and the lower heater 10b is prevented. Thus, the extrusion bar 40b also has a function of locking the removal of the upper heater 10a and the lower heater 10b.

Next, the operation for removing the upper heater 10a and the lower heater 10b will be described.
FIG. 19 is a flowchart for explaining the heater moving operation according to the fifth embodiment.
As shown in FIG. 19, when the heater removal button 18b is pressed and a heater removal signal is transmitted from the heater removal button 18b to the control unit 17 (S301; Yes), the control unit 17 includes the upper heater 10a and the lower heater. It is determined whether 10b is being heated (S302). If the upper heater 10a and the lower heater 10b are being heated (S302; Yes), the notification unit 19 is controlled to notify that the heater cannot be removed by display or sound (S306). In addition to or instead of notifying that the heater cannot be removed in step S306, an alert to the effect that the upper heater 10a and the lower heater 10b are being heated may be notified. .

  If the upper heater 10a and the lower heater 10b are not being heated (S302; No), the control unit 17 is based on a signal from the temperature sensor 16 so that the temperatures of the upper heater 10a and the lower heater 10b can be improved. It is determined whether the temperature is equal to or lower than a predetermined temperature (for example, 37 ° C. to 40 ° C.) (S303). If the upper heater 10a and the lower heater 10b are equal to or lower than the predetermined temperature (S303; Yes), the control unit 17 determines whether the front door 4 is pulled out beyond the predetermined distance D2 based on a signal from the door detection means 42. It is determined whether or not (S304).

  If the front door 4 is pulled out beyond the predetermined distance D2 (S304; Yes), the controller 17 drives the pusher moving motor 41 to rotate the rotating shaft 40a to rotate the pusher bar 40b. Let Accordingly, the upper heater 10a and the lower heater 10b are moved by being pushed by the push bar 40b, and the upper heater 10a and the lower heater 10b are projected from the front opening of the heating chamber 1 by a predetermined length (S305). The user can remove the upper heater 10a and the lower heater 10b from the heating chamber 1 by grasping the protruding portions of the upper heater 10a and the lower heater 10b and pulling them out to the near side. The extruded bar 40b after rotation in step S305 is in a substantially horizontal state as shown in FIGS. 17 and 18, and the extruded bar 40b does not hinder the withdrawal of the upper heater 10a and the lower heater 10b. In step S305, the movement start may be notified before the upper heater 10a and the lower heater 10b are moved, or the movement is terminated after the movement of the upper heater 10a and the lower heater 10b is completed. You may notify.

If the front door 4 is not pulled out beyond the predetermined distance D2 (S304; No), the control unit 17 controls the notification unit 19 to notify that the front door 4 is pulled out by a predetermined distance D2 or more by display or sound. (S307), the process returns to step S304.
If the upper heater 10a and the lower heater 10b are not below the predetermined temperature (S303; No), it is notified that the heater cannot be removed (S306). In addition to or instead of notifying that the heater cannot be removed in step S306, an alert to the effect that the upper heater 10a and the lower heater 10b are at a high temperature may be notified.

  In addition, after the upper heater 10a and the lower heater 10b are removed from the heating chamber 1, the control part 17 rotates the extrusion bar 40b to the state shown with a broken line in FIG. 17, FIG. Moreover, after the upper heater 10a and the lower heater 10b are attached to the heating chamber 1, the control unit 17 rotates the push-out bar 40b to the state shown by the solid lines in FIGS.

  As described above, according to the fifth embodiment, the upper heater 10a and the lower heater 10b cannot be removed from the heating chamber 1 until the temperatures of the upper heater 10a and the lower heater 10b are lowered to a predetermined temperature for further safety. Safety at the time of removing 10a and the lower heater 10b can be improved.

  Moreover, if the temperature of the upper heater 10a and the lower heater 10b has fallen to the predetermined temperature for improving safety | security, the upper heater 10a and the lower heater 10b will be moved to the near side of the heating chamber 1, and the heating chamber 1 will be moved. It was made to protrude from the front opening part. For this reason, the user can easily grasp the upper heater 10a and the lower heater 10b, and the usability when removing the upper heater 10a and the lower heater 10b can be improved. Since the inside of the heating chamber 1 is a space in which five surfaces except the front opening are closed, the visibility from the outside is often not good. For example, when the heating chamber 1 is adopted as a so-called IH cooking heater installed on the cooking table, the heating chamber 1 is located at the height of the user's waist, so that it is difficult to look into the heating chamber 1. In addition, in the heating chamber 1, oil or the like scattered from the food is attached, and when the user puts his / her hand into the heating chamber 1, the hand becomes dirty. Such a matter leads to difficulty in removing the heater from the heating chamber 1. However, according to the fifth embodiment, it is not necessary for the user to put a hand into the heating chamber 1 in order to remove the upper heater 10a and the lower heater 10b. it can.

In the fifth embodiment, as an example of the extruding unit 40, the extruding bar 40b that is inserted into the loop shape of the upper heater 10a and the lower heater 10b and feeds the heater is shown, but the upper heater 10a and the lower heater 10b are shown. The configuration for moving the is not limited to this. For example, a cylindrical member made of a material having a large friction with the upper heater 10a and the lower heater 10b is provided as an extruding portion, and by rotating the cylindrical member, the upper heater 10a, the lower heater 10b, and the cylindrical member It is also possible to move the heater by sending it out by the frictional force.
Further, the heater moving mechanism of the fifth embodiment can be used in combination with the first to fourth embodiments.

Embodiment 6 FIG.
In the fifth embodiment, the upper heater 10a and the lower heater 10b are moved in the pull-out direction by the pushing portion moving motor 41 and the pushing portion 40. In the sixth embodiment, another configuration example for moving the upper heater 10a and the lower heater 10b will be described. In the sixth embodiment, differences from the fifth embodiment will be mainly described, and the same or corresponding components as those in the fifth embodiment are denoted by the same reference numerals.

20 is a schematic cross-sectional view of the main part of the heating chamber according to the sixth embodiment, and FIG. 21 is a perspective view of the main part for explaining the heater moving mechanism according to the sixth embodiment.
As shown in FIGS. 20 and 21, a rectangular parallelepiped pushing portion 43 is provided on the back side of the power feeding portion 11 of the upper heater 10a and the lower heater 10b. The push-out unit 43 contacts the back side of the power feeding unit 11 of the upper heater 10a and the lower heater 10b, and pushes this to move the upper heater 10a and the lower heater 10b to the front side. As shown in FIG. 20A, in the state where the upper heater 10 a and the lower heater 10 b are installed in the power supply unit support groove 9, the pushing portion 43 is located in the power supply unit support groove 9.

  A heater removal lever 47 is provided beside the opening on the front side of the heating chamber 1. The heater removal lever 47 is movable in the vertical direction when the user pushes down or pushes it up. The heater removal lever 47 is provided inside the front door 4, and the heater removal lever 47 is exposed by opening the front door 4. In the fourth embodiment, an example in which the heater removal lever 47 is provided inside the front door 4 will be described. However, the arrangement of the heater removal lever 47 is not limited to this. For example, it can be provided beside the front opening of the heating chamber 1 and outside the front door 4 (a position not covered by the front door 4). Further, the heater removal lever 47 can be arranged at a position other than the front face so that it is difficult for the user to operate by mistake, and the heater removal lever 47 can be arranged at an arbitrary position.

  A support rod 44 extending toward the side is connected to the pushing portion 43. The upper arm 45a extends toward the front side from the support bar 44 connected to the pusher 43 corresponding to the upper heater 10a, and toward the front side from the support bar 44 connected to the pusher 43 corresponding to the lower heater 10b. The lower arm 45b extends. The front ends of the upper arm 45a and the lower arm 45b are connected to the arm connecting plate 46.

  The arm connecting plate 46 is a substantially V-shaped plate-like member in which the upper arm 45a and the lower arm 45b are connected at the upper part on the rear side and connected to the heater removal lever 47 at the front. The arm connecting plate 46 has a function of connecting the upper arm 45a and the lower arm 45b and connecting the heater removal lever 47 to these. A locking hole 46a into which a rod-shaped lever lock 48 can be inserted is formed in a flat plate portion corresponding to the substantially V-shaped arm portion of the arm connecting plate 46. In addition, a rotation shaft 46b is provided on a flat plate portion corresponding to a substantially V-shaped valley portion of the arm connecting plate 46. The rotation shaft 46b is rotatably fitted in a rotation hole (not shown) provided on the heating chamber 1 side.

  The lever lock 48 is configured to be movable in the left-right direction. By moving, the lever lock 48 is inserted into / removed from the locking hole 46 a of the arm connecting plate 46. A lever lock motor 49 connected to the control unit 17 by a signal line is provided. The lever lock motor 49 moves the lever lock 48 in the left-right direction.

  When the heater lock lever 47 is pushed down (arrow U2 in FIG. 21) while the lever lock 48 is removed from the locking hole 46a (arrow U1 in FIG. 21), the arm connecting plate 46 is predetermined with the rotating shaft 46b as an axis. Rotate by an angle. Accordingly, the portion where the upper arm 45a and the lower arm 45b of the arm connecting plate 46 are connected is drawn toward the near side, and the upper arm 45a and the lower arm 45b move toward the near side. By such movement of the upper arm 45a and the lower arm 45b, the pushing portion 43 is pulled toward the near side, and the pushing portion 43 pushes and moves the upper heater 10a and the lower heater 10b (arrow U3 in FIG. 21). In this way, the operating force applied to the heater removal lever 47, which is an operation member that receives an operation in the downward direction, is transmitted to the heating chamber 1 by the transmission member including the arm connecting plate 46, the upper arm 45a (lower arm 45b), and the support rod 44. Is transmitted to the extruding part 43 as a moving force in the front side direction.

  In the sixth embodiment, the pusher moving motor 41 and the pusher 40 in the fifth embodiment are not provided.

Next, an operation related to removal of the upper heater 10a and the lower heater 10b will be described.
First, including during heating by the upper heater 10a and the lower heater 10b, the lever lock 48 is normally inserted into the locking hole 46a of the arm connecting plate 46, and the heater removal lever 47 cannot be pushed down. Yes.

Next, the operation for removing the upper heater 10a and the lower heater 10b will be described. Here, the operation of the heater moving mechanism according to the sixth embodiment will be described using the flowchart shown in FIG. 19 in the fifth embodiment.
In FIG. 19, the operations in steps S301 to S304, step S306, and step S307 are the same as those in the fifth embodiment.

  The sixth embodiment differs from the fifth embodiment in the operation in step S305. That is, if the front door 4 has been pulled out beyond the predetermined distance D2 (S305; Yes), the control unit 17 drives the lever lock motor 49 to connect the lever lock 48 to the locking hole of the arm connecting plate 46. It moves to the state pulled out from 46a (S305). Here, the predetermined distance D2 in the sixth embodiment is the same as the distance that the upper heater 10a and the lower heater 10b move when the uppermost heater removal lever 47 is pushed down to the lowermost position. It is a distance that exceeds. At this time, the control unit 17 controls the notification unit 19 so that the heater removal lever 47 can be operated, and the temperature in the heating chamber 1 is a predetermined temperature for further improving safety. Either or both can be notified. Then, when the user pushes down the heater removal lever 47, the push-out portion 43 is pulled toward the near side, and the upper heater 10a and the lower heater 10b protrude from the front opening of the heating chamber 1 by a predetermined length. . The user can further remove the upper heater 10a and the lower heater 10b from the heating chamber 1 by grasping the protruding portions of the upper heater 10a and the lower heater 10b and pulling them out to the near side.

When the heater removal lever 47 is pushed up, the push-out portion 43 moves backward to the state shown in FIG.
The setting of the heater removal lock, that is, the operation of inserting the lever lock 24 into the locking hole 26a can be performed at an arbitrary timing after the upper heater 10a and the lower heater 10b are attached in the heating chamber 1. .

  As in the sixth embodiment, even when the upper heater 10a and the lower heater 10b are moved to the near side by operating the heater removal lever 47, the same effect as in the fifth embodiment can be obtained.

  Further, the heater moving mechanism of the sixth embodiment can be used in combination with the first to fourth embodiments.

Embodiment 7 FIG.
In the above-described first to sixth embodiments, the coil 6 is disposed on the rear wall 5 of the heating chamber 1, the power supply unit support groove 9 provided corresponding to the coil 6, and the depth of the side wall 3 of the heating chamber 1. The upper heater 10a and the lower heater 10b are supported by the heater support groove 15 provided along the direction. In the seventh embodiment, another arrangement example of the arrangement of the coil 6 and the support structure of the upper heater 10a and the lower heater 10b will be described. In the seventh embodiment, differences from the first embodiment will be mainly described, and the same or corresponding components as those in the first embodiment are denoted by the same reference numerals.

  FIG. 22 is a perspective view of the main part of the heating chamber according to the seventh embodiment. A coil 6a and a coil 6b are respectively disposed on the left and right side walls 3 of the heating chamber 1 shown in FIG. And in the position corresponding to the coils 6a and 6b, the magnetic body 7a (not shown in FIG. 22) which has the same function as the magnetic body 7 and the heat insulation member 8 in Embodiment 1, the magnetic body 7b, and the heat insulation member 8a and a heat insulating member 8b. The seventh embodiment is different from the first embodiment in that the heat insulating members 8 a and 8 b are provided along the depth direction of the side wall 3, and the heat insulating members 8 a and 8 b are provided along the depth direction of the side wall 3. The power supply portion support groove 9a and the power supply portion support groove 9b are provided. The side portions of the upper heater 10a and the lower heater 10b are inserted into and supported by the recessed portions of the power supply portion support grooves 9a and 9b. In the seventh embodiment, the power supply portion support grooves 9a and 9b also serve as the functions of the power supply portion support groove 9 and the heater support groove 15 in the first embodiment.

  Moreover, the upper heater 10a and the lower heater 10b are each provided with the electric power feeding part 11 in the position corresponding to the coils 6a and 6b when it is mounted in the electric power feeding part support grooves 9a and 9b. In FIG. 22, the power feeding unit 11 is indicated by a broken line for explanation.

Even with such a configuration, the upper heater 10 a and the lower heater 10 b can be detached from the heating chamber 1 through the front opening of the heating chamber 1.
Further, the arrangement of the coil 6 shown in the seventh embodiment and the support structure for the upper heater 10a and the lower heater 10b are the heater removal lock mechanism shown in the first and second embodiments and the heater shown in the third and fourth embodiments. It can be combined with the cover opening / closing mechanism and the heater moving mechanism shown in the fifth and sixth embodiments, and the same effect can be obtained.

  DESCRIPTION OF SYMBOLS 1 Heating chamber, 2a upper wall, 2b lower wall, 3 side wall, 4 front door, 5 rear wall, 6 coil, 6a, 6b coil, 7 magnetic body, 7a, 7b magnetic body, 8 heat insulation member, 8a, 8b heat insulation member , 9 Feeder support groove, 9a, 9b Feeder support groove, 10a Upper heater, 10a1 horizontal part, 10b Lower heater, 10b1 Horizontal part, 11 Feeder part, 12 Heating part, 13 Saucer, 14 Burning net, 15 Heater support groove , 16 Temperature sensor, 17 Control unit, 18 Operation unit, 18a Heating instruction button, 18b Heater removal button, 19 Notification unit, 20a Lock rod, 20b Lock rod, 21 Lock rod moving motor, 23 Lever, 24 Lever lock, 25 Lever lock motor, 26 arm connecting plate, 26a locking hole, 26b rotating shaft, 27a upper arm, 27b lower arm, 28a upper gear Id rail, 28a1 inclined groove, 28b lower guide rail, 28b1 inclined groove, 29a support plate, 29b support rod, 29c connecting portion, 29d connecting portion, 30 heater cover, 30a heater cover, 30b heater cover, 31 cover moving motor, 32a Heater cover, 32b Heater cover, 33 Heater removal lever, 40 Extruding part, 40a Rotating shaft, 40b Extruding bar, 41 Extruding part moving motor, 42 Door detection means, 43 Extruding part, 44 Support rod, 45a Upper arm, 45b Lower Arm, 46 Arm connecting plate, 46a Locking hole, 46b Rotating shaft, 47 Heater removal lever, 48 Lever lock, 49 Lever lock motor.

Claims (14)

A box-shaped heating chamber;
A coil that is supplied with a high-frequency current to generate a high-frequency magnetic flux;
A heater that is detachably disposed within the heating chamber, generates an induced current by magnetic flux generated from the coil, and generates heat;
Temperature detecting means for detecting the temperature of the heater;
An operation unit for instructing removal of the heater;
Removal preventing means for preventing the heater from being removed from the heating chamber;
Control means for releasing the removal preventing function of the removal preventing means and making the heater removable when the heater is instructed to be removed by the operation unit if the temperature of the heater is equal to or lower than a predetermined temperature. An induction heating cooker characterized by that. The removal preventing means includes
An engaging portion that engages with a portion of the heater;
The engagement portion moving means for moving the engagement portion so that the engagement portion engages with a part of the heater when preventing the heater from being removed is provided. Induction heating cooker. The heater has an intersecting portion extending in a direction intersecting with the direction of taking out from the heating chamber,
The induction heating cooker according to claim 2, wherein the engaging portion is disposed on the near side of the intersecting portion with respect to the direction of taking out the heater and engages with the intersecting portion. The engaging portion is a rod-like member that is arranged so that the major axis direction is the vertical direction and is capable of moving up and down.
The induction heating cooker according to claim 2 or 3, wherein the engagement portion moving means includes a motor that is controlled by the control portion means to move the rod-shaped member in the vertical direction. The engaging portion is a rod-like member that is arranged so that the major axis direction is the vertical direction and is capable of moving up and down.
The engaging portion moving means includes
An operation member for receiving an operation in a predetermined direction;
The induction heating cooker according to claim 2, further comprising a transmission member that transmits an operation force to the operation member as a moving force of the rod-shaped member. The removal preventing means includes
A heater cover covering the front side of the heater;
The induction heating cooker according to claim 1, further comprising heater cover moving means for moving the cover so that the heater cover covers the front side of the heater when preventing the heater from being removed. The induction heating cooker according to claim 6, wherein the heater cover moving unit includes a motor that is controlled by the control unit to move the heater cover. The heater cover moving means includes
An operation member for receiving an operation in a predetermined direction;
The induction heating cooker according to claim 6, further comprising: a transmission member that transmits an operation force applied to the operation member as a moving force of the heater cover. The removal preventing means includes
The induction heating cooker according to any one of claims 1 to 8, further comprising a heater moving unit that moves the heater in a take-out direction when the heater can be removed. . The heater moving means includes
The induction heating cooker according to claim 9, further comprising a rotating unit that engages with the heater and rotates to send out the heater in a take-out direction. The heater moving means includes
The induction heating cooker according to claim 10, further comprising a motor that is controlled by the control unit and rotates the rotating unit. The heater moving means includes
An operation member for receiving an operation in a predetermined direction;
The induction heating cooker according to claim 9, further comprising: a transmission member that transmits an operation force applied to the operation member as a moving force of the heater. The coil is disposed on the back side of the heating chamber,
The heater includes a power feeding unit arranged to interlink with the magnetic flux generated from the coil,
A heater support groove provided along the direction of taking out the heater with respect to the heating chamber, and supporting the heater;
The power supply part supporting groove which is provided in the position corresponding to the coil in the heating cabinet, and supports the power supply part of the heater is provided. Induction heating cooker. The coil is disposed on both the left and right side walls of the heating chamber,
The heater includes a plurality of power feeding portions respectively arranged so as to interlink with magnetic flux generated from the coil,
A power supply portion support groove is provided along the direction of taking out the heater with respect to the heating chamber, and provided at a position corresponding to the coil in the heating chamber, and supporting the power supply portion of the heater. The induction heating cooker as described in any one of Claims 1-12.