JP5159505B2 - Cooker - Google Patents

Description

  The present invention relates to operation and display of a deep-fried food function of a heating cooker, and operation and display of a heat retaining function.

    A conventional cooking device includes a plurality of heater heating units arranged on the top plate of the cooking unit and a control circuit for controlling these heating units. The temperature control means (such as deep-fried food function) to adjust the temperature of the cooked food etc.) to a preset temperature range, and a temperature display lamp group consisting of two or more lamps, adjusting the temperature range When the temperature reaches a predetermined temperature range, there is a display that notifies that the temperature is in an appropriate temperature stage. (For example, see Patent Document 1)

  Also, in a conventional cooking device, the thermal power is adjusted with a thermal lever composed of a variable resistor while looking at the display of the thermal lamp. When the thermal lever is pushed all the way to the left, it shifts to heat insulation and pushed all the way to the right. In some cases there will be maximum firepower. (For example, see Patent Document 2)

Japanese Patent Laid-Open No. 2001-336757 (page 6-7, FIG. 5) Japanese Patent Publication No. 03-000756 (Page 6, Fig. 3)

  In the conventional cooking device, both the progress display during preheating of the fried food function and the temperature display are displayed by a temperature display lamp group composed of two or more lamps. In particular, if the fried food function has multiple modes such as cooking mode (small amount mode / large amount mode) for the amount of oil to be used, the progress display during preheating is in the small amount mode / large amount mode. If it is the same, even if a dedicated lamp indicating the mode difference is provided, it is difficult for the cooker user to understand the mode difference, and heating should be set in the small amount mode for fried food cooking using a small amount of oil However, there has been a problem that there is a risk of heating with the heating setting of the large quantity mode.

  In addition, in a conventional cooking device that performs thermal power adjustment with a thermal lever, which is a variable resistor, while looking at the display of the thermal lamp, when setting the minimum thermal power and setting the transition to the heat insulation mode, the two are distinguished. Another problem is that it is complicated to operate the thermal lever. Furthermore, in order to distinguish between the heat retention setting and the normal heating setting, it is necessary to make a judgment only with the lamp display, which is difficult to understand.

This invention was made | formed in order to solve the above subjects, and it aims at providing the heating cooker which is easy to visually recognize the difference in multiple modes about the fried food preheating process of multiple modes.

  It is another object of the present invention to provide a heating cooker that can be easily set to the heat retention mode and that the transition to the heat retention mode is easily visible.

A heating cooker of the present invention includes a main body having an upper surface opened, a top plate that covers the upper surface of the main body and on which an object to be heated is placed, a heating unit that is disposed below the top plate and heats the object to be heated, While changing the number of lamps used for lighting among the lamp group based on the temperature detection means for detecting the temperature of the heated object, a display unit having a lamp group for displaying the temperature state of the heated object, and the heat capacity of the heated object When the temperature of the object to be heated is in a preheating stage in which the temperature is adjusted to a target temperature from a state lower than a preset target temperature, the display control changes the lighting mode of the lamp used for lighting with respect to the temperature of the object to be heated Part, input means for outputting a pulse according to the rotation angle and direction, and setting the heating power of the heating means at a plurality of levels, and a heat retention mode for controlling the temperature of the object to be heated at a predetermined temperature And a heating control means for controlling the heating means based on a pulse output from the input means, and the heating control means is rotated in a direction to further reduce the heating power from the setting state of the lowest output heating power set by the input means. It is characterized by shifting to the heat retention mode .

ADVANTAGE OF THE INVENTION According to this invention, the heating cooker provided with the display part which displays the difference of several modes of a fried food function in an easy-to-understand manner can be provided.
In addition, it is possible to provide a cooking device capable of performing an operation that can be easily transferred from the minimum heating power to the heat retaining function.

Embodiment 1 FIG.
As the display device and the cooking device in the first embodiment, a heating cooking device (an induction heating cooking device called a built-in type or a built-in type) using an induction heating heater as a heating unit will be described as an example. In addition, as a display apparatus and a heating cooker, it is applicable not only to a dielectric heating cooker and the display apparatus used for this but a microwave oven, a jar rice cooker, etc.

  1 is an exploded perspective view showing a heating cooker body according to Embodiment 1. FIG. FIG. 2 is a perspective view showing the entire top plate and the main body according to the first embodiment. FIG. 3 is a plan view of a part of the front of the main body according to the first embodiment. FIG. 4 is a plan view of the entire main body according to the first embodiment. FIG. 5 is a longitudinal cross-sectional view at the right half side position of the main body according to the first embodiment. FIG. 8 is a configuration diagram of the control circuit according to the first embodiment. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

(Heat cooker body)
The heating cooker includes one rectangular main body A. The main body A corresponds to the main body of the present invention. Usually, the top plate B constituting the upper surface of the main body A, the casing C constituting the periphery (outer) other than the upper surface of the main body A, pots and foods Heating means D that heats etc. with electric energy, etc., operating means E operated by the user, control means F that controls the heating means in response to a signal from the operating means, and a display that displays the operating conditions of the heating means Means G are provided. Further, as a part of the heating means D, an electric heating means called a grill box or a roaster is provided.

  The operating conditions of the heating means refer to electrical and physical conditions for heating, and collectively refers to energization time, energization amount, heating temperature, energization pattern (continuous energization, intermittent energization, etc.) and the like.

  Display means that the user is informed of operating conditions and related information that is useful for cooking (changes in characters, symbols, illustrations, colors, presence / absence of light emission, light emission brightness, etc.) Including the target one, this is simply the operation of visually informing the user of “Cooking related information”.

  Unless otherwise specified, the display means includes a liquid crystal (LCD), various light emitting elements (an example of a semiconductor light emitting element is LED (Light Emitting Diode), LD (Laser Diode)), organic Electroluminescence (EL) element or the like. For this reason, the meaning of the display means includes a display screen such as a liquid crystal screen or an EL screen.

  The notification is an operation for notifying the user of the operation conditions of the control means and cooking-related information by means of display, buzzer or electrical sound (refers to electrically generated or synthesized sound).

  The notification means includes notification means using audible sounds such as a buzzer and a speaker, and notification means using characters, symbols, illustrations, or visible light.

Inside the main body case 2 are a right IH heating source 6R, a left IH heating source 6L, which generate electromagnetic energy for heating an object to be heated N such as a metal pan placed on a top plate 21 described later, and A central heating source 7 that generates thermal energy, a control means F that controls cooking conditions of the right IH heating source 6R, left IH heating source 6L, and the central heating source 7 to be described later; Operating means E, which will be described later, and display means G for displaying information on the operating conditions of the heating means input by the operating means E.
Hereinafter, each will be described in detail.

  As shown in FIG. 1, the interior of the housing C is roughly divided into an electrical component chamber 8, a roaster heating chamber 9, an upper component chamber 10, an intake chamber 11, and an exhaust chamber 12. Note that the rooms are not completely isolated from each other. For example, the electrical component chamber 8 communicates with the intake chamber 11 and the exhaust chamber 12.

  The roaster heating chamber 9 is a substantially independent sealed space when the door 13 to be described later is closed. However, the roaster heating chamber 9 communicates with an external space of the casing C, that is, an indoor space such as a kitchen via the exhaust duct 14. ing.

(Top plate B)
As shown in FIG. 2, the top plate portion B is composed of two large parts, an upper frame 20 and a top plate 21.
The entire upper frame 20 is formed in a frame shape from a metal plate such as a nonmagnetic stainless steel plate or an aluminum plate, and has a size that closes the upper surface opening 2SP of the main body case 2.

The top plate 21 is placed so as to cover a large opening 20 </ b> A provided in the center of the upper frame 20. The top plate 21 is entirely made of a translucent material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass, and is formed in a rectangle or a square according to the shape of the opening 20A of the upper frame 20.
Further, as shown in FIGS. 10 and 11, the top plate 21 is fixed in a watertight state with a rubber packing or a seal material PK interposed between the opening 20A of the upper frame 20 and the upper surface. Accordingly, water droplets or the like from the upper surface of the top plate 21 are prevented from entering the inside of the main body part A through the gap between the upper frame 20 and the top plate 21.

  In FIG. 2 again, circular guide marks 6RM, 6LM, and 7M indicating the approximate positions of the right IH heating source 6R, the left IH heating source 6L, and the central heating source 7 to be described later are printed on the upper surface of the top plate 21, respectively. It is displayed by the method.

(Heating means D)
As shown in FIGS. 1 and 2, in the heating cooker according to the first embodiment, as the heating means D, the right IH heating source 6 </ b> R disposed at the upper right position of the main body portion A, the upper left position of the main body portion A. Left IH heating source 6L, a central heating source 7 arranged near the rear of the upper center of the main part A, and heaters 22 and 23 which are a pair of upper and lower radiant electric heating sources for the roaster (FIG. 7). See). These heating sources are configured such that energization is controlled independently by the control means F. Details of the control will be described later.

(Right IH heating source 6R)
As shown in FIGS. 1 and 2, the right IH heating source 6 </ b> R is installed inside the upper part chamber 10 that is partitioned and formed inside the main body case 2. The right IH heating coil 6RC is arranged on the lower surface side of the right side position of the top plate 21. The upper end portion of the right IH heating coil 6RC is close to the lower surface of the top plate 21 with a minute gap, and serves as an electromagnetic induction heating source. In the first embodiment, for example, the one having the capacity of maximum power consumption (maximum thermal power) 3 kW is used.
The right IH heating coil 6RC is formed by winding a bundle of about 30 thin wires of about 0.1 mm in a spiral shape, and winding this bundle while twisting one or a plurality of wires so that the outer shape becomes a circular shape. It is molded into a shape. The diameter (maximum outer diameter dimension) of the right IH heating coil 6RC is about 180 mm.

  The position of the guide mark 6RM which is a circle (broken line in FIG. 2) displayed on the top plate 21 indicates a proper induction heating region.

  The right IH heating coil 6RC may be divided into a plurality of parts so as to be energized independently. For example, an IH heating coil is wound inside in a spiral shape, and another large-diameter spiral IH heating coil is placed on the outer peripheral side of the IH heating coil on the same concentric circle and substantially on the same plane. The article to be heated N may be heated in three energization patterns: energization of the heating coil, energization of the outer IH heating coil, and energization of the inner and outer IH heating coils. Thus, from at least one of the output level, duty ratio, and output time interval of the high-frequency power flowing through the two IH heating coils, or a combination thereof, it is efficient from a small pan to a large (large diameter) pan. You may make it heat (Japanese Patent No. 2978069 is known as a typical technique using such a plurality of coils that can be independently energized).

  A plurality of air holes 30 are formed at equal intervals on the ceiling surface of the annular protrusion 26. Reference numeral 31 </ b> R denotes an infrared temperature detecting element installed inside the protrusion 26. The temperature detection element 31 </ b> R faces the light receiving part 33 </ b> R at a position directly above the opening 32 formed at the center of the ceiling surface of the protrusion 26. Reference numeral 34R denotes a lead wire of the temperature detection element 31R (see FIG. 6).

  The infrared temperature detection element 31 </ b> R (hereinafter also referred to as “infrared sensor”) is configured by a photodiode or the like that can measure the temperature by detecting the amount of infrared rays radiated from a heated object N such as a pan. The temperature detection element 31R may be a heat transfer type detection element, for example, a thermistor type temperature sensor. This temperature detection element corresponds to the temperature detection means of the present invention.

When the infrared temperature sensor is provided as shown in FIG. 6, the temperature of the object to be heated N can be detected at a position corresponding to the center of the bottom of the object to be heated N. That is, there is Stefan-Boltzmann's law that the infrared energy radiated from the heated object N is proportional to the fourth power of the absolute temperature of the heated object N, and the infrared energy radiated at an accelerated rate as the temperature increases. Will increase. Therefore, this infrared sensor is one that receives the emitted infrared light and uses a voltage proportional to the energy of the infrared light as an output.
When an actual infrared sensor is used, a band pass filter (band filter) that transmits only a wavelength in a predetermined band in order to cut infrared rays emitted from the top plate 21 below the object N to be heated is an infrared ray. It is installed in front of the light receiving part (light receiving part 33R) so as to efficiently capture the infrared rays from the heated object N. However, since the received light energy is still weak, the amplifying means (amplifier) amplifies the received light energy and It is devised to obtain a voltage output according to the amount of energy.

  The rapid detection of the infrared rays emitted from the heated object N according to the temperature from the lower side of the top plate 21 by the infrared sensor is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-95144 (Japanese Patent No. 3975865), This is known from Japanese Unexamined Patent Application Publication No. 2006-310115 and Japanese Patent Application Laid-Open No. 2007-18787.

  When the infrared temperature detection element 31R is used, it is possible to collect the infrared rays radiated from the object N to be heated and to receive the temperature in real time (with little time difference) and detect the temperature from the amount of the infrared rays (thermistor). Better than formula). This infrared sensor can be used regardless of whether the temperature of the top plate 21 made of heat-resistant glass or ceramics in front of the object to be heated N and the temperature of the object to be heated N are the same. The temperature of the heated object N can be detected. That is, the infrared rays radiated from the heated object N are devised so that they are not absorbed or blocked by the top plate 21. For example, the top plate 21 is selected from a material that transmits infrared rays having a wavelength range of 4.0 μm or 2.5 μm or less, while the temperature detecting element 31R transmits infrared rays having a wavelength range of 4.0 μm or 2.5 μm or less. What to detect is selected.

  On the other hand, when the temperature detection element 31R is of a heat transfer type such as a thermistor, it is inferior in capturing a rapid temperature change in real time as compared with the above-described infrared sensor, but from the top plate 21 or the object N to be heated. The temperature of the bottom part of the to-be-heated material N and the top plate 21 just under it can be detected reliably. Further, the temperature of the top plate 21 can be detected even when there is no object to be heated N. When the temperature detection element 31R is a heat transfer type such as a thermistor, the light receiving portion 33R is directly in contact with the lower surface of the top plate 21, or a member such as a heat transfer resin is interposed so that the top plate 21 itself The temperature may be grasped as accurately as possible. This is because if there is a gap between the light receiving portion 33R and the lower surface of the top plate 21, a delay in temperature transmission occurs.

  In addition, when the temperature detection element 31R detects the temperature of the top plate 21 or the object N to be heated, the temperature detection element 31R is specific to the object of temperature measurement regardless of whether it is a heat transfer type such as a thermistor or an infrared type. It is actually difficult to accurately detect only the temperature of only the calculated value (theoretical value), so the temperature of the bottom center of the object to be heated N and the temperature of its outer peripheral surface (with the object to be heated N) are placed with a small gap. Indirect detection is performed, and the difference between the temperature indicated by the measurement data at that time and the actual temperature obtained from the experimental result is verified, and the detected temperatures of the temperature detecting elements 31R and 31L are the same as those of the top plate 21 and the object N to be heated. You may make it adjust beforehand so that it may become a thing close | similar to real temperature.

  Moreover, you may use as a sensor for determining whether the to-be-heated material N is mounted on the said top plate 21 using the temperature detection element 31R.

In FIG. 6, reference numeral 41 denotes a cavity formed below the protrusion 26. The cavity 41 secures a space through which the cooling air Y2 flows around the temperature detection element 31R.
Reference numeral 42 denotes a magnetic flux leakage prevention material attached to the lower surface (back surface) of the right IH heating coil 6RC. The magnetic flux leakage prevention material 42 is made of a highly permeable material, for example, ferrite. The magnetic flux leakage prevention material 42 does not need to cover the entire lower surface of the right IH heating coil 6RC, and the magnetic flux leakage prevention material formed in a bar shape with a cross section of, for example, a square or a rectangle is predetermined so as to intersect the right IH heating coil 6RC. A plurality may be provided at intervals. That is, a plurality of radials may be provided centering on the protrusion 26.

43 is a duct. The duct 43 has a length (horizontal width) that extends both below the base 24 of the right IH heating coil 6RC and below the base (not shown) of the left IH heating coil 6LC. The duct 43 is installed on the partition plate 27. That is, the duct 43 has a length close to the entire width of the upper part chamber 10.
The duct 43 is formed with a central vent 45 corresponding to the opening 44 formed in the partition plate 27 and a plurality of vents 46 around it, and cooling air introduced from the opening 44 is formed. Is distributed to a predetermined position of the right IH heating coil 6RC. Y3 indicates cooling air (hereinafter referred to as “cooling air Y3”) that flows through the vent 46 and flows under the right IH heating coil 6RC. The remaining cooling air introduced into the duct 43 through the opening 44 and blown out from the central vent 45 and the plurality of vents 46 is blown similarly below the left IH heating coil 6LC, and left The base (not shown) of the IH heating coil 6LC is cooled.

In this way, the cooling air passage 39 is formed radially around the protrusion 26 by the rib 37 integrally formed with the resin adhesive 36 on the upper surface of the right IH heating coil 6RC. The cooling air Y1 can be effectively flowed from the central portion of the cooling air passage 39 formed by the protrusions 38. With this cooling air Y1, the right IH heating coil 6RC can be cooled from above, and the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved.
Moreover, since the cooling air Y3 can be flowed to the lower surface of the right IH heating coil 6RC, the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved.
Further, since the rib 37 and the protrusion 38 are formed by pouring the heat-resistant / thermosetting adhesive material 36 on the upper surface of the right IH heating coil 6RC, the entire right IH heating coil 6RC is firmly integrated, and predetermined This has the effect of maintaining the circular shape.

(Left IH heating source 6L)
As shown in FIG. 1, the left IH heating source 6L is installed at a position contrasting with the right IH heating source 6R across the center of the left and right of the main body A, and has the same configuration as the right IH heating source 6R. Therefore, although detailed description is omitted, corresponding to the right IH heating source 6R, the temperature detection element 31L installed inside the protrusion 26 and the opening 32 formed at the center of the ceiling surface of the protrusion 26 It has a light receiving portion 33L facing directly above and a temperature detection element lead wire 34L. The temperature detection element 31L is the same as the temperature detection element 31R.

In the first embodiment, the left IH heating coil 6LC having, for example, a maximum power consumption (maximum heating power) of 3 kW or 2.5 kW is used. The diameter (maximum outer diameter) of the left IH heating coil 6LC is about 180 mm when the maximum heating power is 3 kW, and about 170 mm when the maximum heating power is 2.5 kW.
The position of the guide mark 6LM which is a circle (broken line in FIG. 2) displayed on the top plate 21 at a position corresponding to the upper side of the left IH heating source 6L indicates an appropriate induction heating region.

  In the following description, the description of “left, right” in the name and “L, R” in the reference may be omitted for the contents shared for the members arranged in common on the left and right.

(Radiation type central electric heating source)
1 and 2 again, reference numeral 7 denotes a radiant central electric heating source (hereinafter referred to as “central heating source 7”). The central heating source 7 is disposed inside the main body part A, substantially on the left and right center line of the top plate 21 and near the rear part of the top plate 21.
The central heating source 7 is an electric heater (for example, a nichrome wire, a halogen heater, or a radiant heater) that is heated by radiation, and heats an object N to be heated such as a pan through the top plate 21 from below. And, for example, the one having the capacity of maximum power consumption (maximum heating power) 1.2 kW is used.

The central heating source 7 has a circular container shape with the entire upper surface opened, and the container-like cover 50 (see FIG. 5) made of heat insulating material constituting the outermost peripheral portion has a maximum outer diameter of about 180 mm, The thickness is 5 mm.
Further, a guide mark 7M of a circle (a broken line in FIG. 2) indicating a position corresponding to the upper side of the central heating source 7 is displayed on the top plate 21 by a method such as printing. The guide mark 7M indicates a proper induction heating area.

(Radiation type electric heating source)
As shown in FIGS. 4 and 7, the partition plate 27 has a size that divides the interior of the housing C into two upper and lower spaces. The lower right side is an electric component chamber 8 and the left side is a space 52 with a roaster heating chamber 9.
As shown in FIG. 1 and FIG. 4, the upper and lower partition plates 51 are located between the electrical component chamber 8 and the roaster heating chamber 9 to partition the both. The upper end of the upper and lower partition plates 51 is in contact with the lower surface of the partition plate 27 and the lower end is in contact with the inner bottom surface of the casing C.

  As shown in FIG. 7, in the space 52, there is a roaster heating chamber 9 formed in a rectangular box shape. The roaster heating chamber 9 has wall surfaces on the left, right, top, bottom, and back sides formed of metal plates such as stainless steel and steel plates, and a pair of upper and lower heaters 22 and 23 as a radiant electric heating source near the top and bottom. (Seeds heater) is installed so as to spread substantially horizontally.

These two heaters 22 and 23 are energized simultaneously or individually, and roast cooking (for example, grilled fish), grill cooking (for example, pizza or gratin), or oven cooking (for example, by setting the atmospheric temperature in the roaster heating chamber 9 (for example, Cakes and baked vegetables). For example, the heater 22 near the top ceiling has a maximum power consumption (maximum thermal power) of 1200 W, and the heater 23 near the bottom has a maximum power consumption of 800 W.
The space 52 communicates with the exhaust chamber 12 so that the air in the space 52 is discharged out of the main body A through the exhaust chamber 12.

As shown in FIG. 1, reference numeral 53 denotes a rear partition plate provided at the rear portion of the partition plate 27 in order to form an exhaust chamber 12 different from the upper component chamber 10. The rear partition plate 53 has a height dimension such that the lower end portion is in contact with the partition plate 27 and the upper end portion is in contact with the top plate 21.
As shown in FIGS. 1 and 5, a blower case 54 is provided at the right rear part of the partition plate 27 in order to form an intake chamber 11 different from the upper component chamber 10 and the electrical component chamber 8. The blower case 54 has an upper portion connected to the root portion of a duct 55 in which an intake port 55A is formed.
As shown in FIGS. 1 and 5, 56 is an air outlet formed at the front (front) side center of the blower case 54.
As shown in FIG. 5, 54 </ b> A is a ceiling wall extending continuously from the blower case 54 and horizontally. Reference numeral 57 denotes a blower stored inside the blower case 54. The blower 57 includes a fan unit 58 and a motor 59.
The rear partition plate 53 may be formed integrally by cutting and raising the partition plate 27.

(Cooling fan)
The blower 57 of the first embodiment may be an axial flow type blower, a centrifugal type blower (typically a sirocco fan), a so-called multi-blade type blower, or a turbo type blower. In this case, all of these types of fans are included unless otherwise specified.

As shown in FIG. 5, the blower 57 uses a sirocco fan of a centrifugal blower in which a partition plate 59A is fixed to the rotating shaft of a motor 59 and wings 57A are formed around the partition plate 59A.
The wind from the blower 57 flows from the right to the left in the upper part chamber 10 as indicated by an arrow Y4 in FIG. 4 and is finally sent out from the exhaust chamber 12 to the outside of the main body A (note that it is fine) Since the wind flow changes variously depending on the arrangement of the built-in components, the arrow Y4 indicates the main flow of the wind flow).

  In addition, cooling an IH heating coil etc. using a sirocco fan, for example, patent 3945485, and similarly cooling an IH heating coil etc. using a turbo fan, an axial fan, and a multiblade fan, It is known from JP 2007-184287 A, JP 2004-39263 A, JP 2002-110329 A, and the like. Axial-flow blower, centrifugal blower, or turbo blower have different characteristics from each other, and the amount of generated air and noise (wind noise) are not the same even when driven with the same amount of power. Choose an advantageous system according to your needs.

  Also, as shown in FIG. 5, when a centrifugal blower is used, the portion near the partition plate 59A is the highest part of the discharge capacity (blowout capacity), so the left IH heating is placed in front of the position of the partition plate 59A. When the left mounted circuit board 150L of the source 6L is positioned, the circuit board is cooled by the strongest wind. However, if the air from the indoor space such as kitchen contains oily smoke or dust, it should be noted that it is highly likely to adhere and accumulate on the component surface of the left mounting circuit board 150L. is there. This is because, over many years of use, oil deposits accumulate on the left-mounted circuit board 150L (the same applies to 150R), which leads to a decrease in electrical insulation of the circuit board by absorbing moisture.

(Operating means E)
1 and 2 again, the operation device E of the heating cooker according to the first embodiment includes a front operation unit 60 and an upper operation unit 61.

(Front operation unit 60)
A plastic front operation frame 62 is attached to the right front surface of the main body case 2, and the front surface of the front operation frame 62 is a front operation unit 60. In the front operation unit 60, all the power sources of the left IH heating source 6L, the right IH heating source 6R, the central heating source 7, and the heaters 22 and 23 (see FIG. 7) of the roaster heating chamber 9 are turned on / off simultaneously. An operation button 63A of the main power switch 63 (see FIG. 1), a right operation dial 64R for opening and closing an electrical contact of a control switch (not shown) for controlling energization of the right IH heating source 6R and its energization amount (thermal power), Similarly, the left operation dial 64L of the left control switch (not shown) for controlling energization of the left IH heating source 6L and its energization amount (thermal power), and energization of the central heating source 7 and its energization amount (thermal power) are controlled. A central operation dial 65 of a control switch (not shown) is provided.

  The front operation section 60 is energized to the left IH heating source 6R by the left operation lamp 64L and the left operation lamp 64L that is lit only when the left IH heating source 6L is energized by the left operation dial 64L. And a right indicator lamp 66R that is lit only when it is in the closed state.

  Note that the left operation dial 64L, the right operation dial 64R, and the central operation dial 65 are pushed inward so as not to protrude from the front surface of the front operation unit 60 when not in use, as shown in FIG. In use, when the user presses the finger once and then releases it, it protrudes by the force of a spring (not shown) built in the front operation frame 62 so that the user can grab and turn around It will be. At this stage, energization of the left IH heating source 6L, the right IH heating source 6R, and the central heating source 7 is started.

  Therefore, if any of the protruding left operation dial 64L, right operation dial 64R, or central operation dial 65 is turned to the left or right, a predetermined generated from a built-in rotary encoder (not shown) according to the amount of rotation. Is read by the control means F, the energization amount of the heating source is determined, and the heating power can be set. Regardless of whether the left operation dial 64L, the right operation dial 64R, or the central operation dial 65 is in the initial state or turned to the left or right in the middle, the user presses the front operation once with a finger. When pushed into a predetermined position so as not to protrude from the front surface of the part 60, any of the left IH heating source 6L, the right IH heating source 6R and the central heating source 7 can be de-energized (even during cooking, the right operation If the dial 64R is pushed in, the right IH heating source 6R is immediately de-energized).

  If the operation button 63A of the main power switch 63 (see FIG. 1) is opened (OFF), then the operations of the right operation dial 64R and the left operation dial 64L will be invalidated at the same time. Similarly, the energization of the heaters 22 and 23 built in the central heating source 7 and the roaster heating chamber 9 are all cut off.

  Further, three independent timer dials 66, 67, 68 are provided at the lower front portion of the front operation frame 62. These timer dials 66, 67, 68 energize the left IH heating source 6L, the right IH heating source 6R, and the central heating source 7 for a desired time (timer set time) from the start of energization, and after the set time has elapsed. Is for operating a timer switch (not shown) that automatically turns off the power.

(Upper surface operation unit 61)
As shown in FIGS. 2 and 3, the upper surface operation unit 61 includes a right heating power setting operation unit 70, a left heating power setting operation unit 71, and a central operation unit 72.

  An upper surface operation unit 61 is disposed on the upper surface of the top plate 21, specifically, on the front portion of the upper frame 20. A right heating power setting operation unit 70 of the right IH heating source 6R is installed on the right side of the central left and right center line (CL in FIG. 3) of the main body A, and the central heating source 7 and the roaster heating chamber 9 are installed in the center. The central operation unit 72 of the heaters 22 and 23 is arranged, and the left heating power setting operation unit 71 of the left IH heating source 6L is arranged on the left side.

(Right heating power setting operation unit 70)
In FIG. 3, in the right heating power setting operation unit 70 for setting the heating power of the right IH heating source 6R, the user can easily set the heating power of the right IH heating source 6R only by pressing once. A one-touch key unit 73 is provided.
The right one-touch key unit 73 includes three one-touch keys, a low heat key 74, a medium heat key 75, and a strong heat key 76. For example, the low heating power key 74 sets the heating power of the right IH heating source 6R to 300 W, the middle heating power key 75 sets to 750 W, and the high heating power key 76 sets to 2.5 kW.
Further, a 3 kW key 77 is provided at the right end portion of the right one-touch key portion 73, and when it is desired to increase the heating power of the right IH heating source 6R (for example, 3 kW), this is pressed.

(Left heating power setting operation unit 71)
In FIG. 3, in the left heating power setting operation unit 71 for setting the heating power of the left IH heating source 6L, the user can easily set the heating power of the left IH heating source 6L only by pressing once. A one-touch key portion 82 is provided.
The left one-touch key portion 82 includes three one-touch keys, a low heat key 78, a medium heat key 79, and a high heat key 80. For example, the low heating power key 78 sets the heating power of the left IH heating source 6L to 300 W, the middle heating power key 79 sets to 750 W, and the high heating power key 80 sets to 2.5 kW.
Further, a 3 kW key 81 is provided at the right end portion of the left one-touch key portion 82, and when it is desired to increase the heating power of the left IH heating source 6L (for example, 3 kW), this is pressed.
The set thermal power by the 3 kW key 81 is not limited to 3 kW, and may be an arbitrary thermal power (for example, 2.5 kW).

(Central operation unit 72)
As shown in FIG. 3, the central operation unit 72 includes an operation button 90 of an operation switch (not shown) for starting energization of the heaters 22 and 23 of the roaster heating chamber 9 used for roast cooking, oven cooking, and grill cooking. An operation button 91 of an operation switch (not shown) for stopping energization is provided side by side.
In addition, the central operating unit 72 adds or subtracts the control temperature in grill cooking by the heaters 22 and 23 of the roaster heating chamber 9 and electromagnetic cooking by the left IH heating source 6L and the right IH heating source 6R one by one. Operation buttons 92 and 93 of temperature control switches (not shown) to be set are provided in a horizontal row. Further, a power on / off switch button 94 for the central heating source 7 is provided.

  In FIG. 2, 97R is a start switch (hereinafter referred to as “right timer switch 97R”) for operating / starting a timer counter (not shown), and is provided at the right end of the upper surface operation unit 61. When it is pressed once and started, the time is measured from that point, and the right liquid crystal display unit 98R provided in the right front corner of the top plate 21 (located near the lower surface of the top plate 21 and via the top plate 21). The information on the elapsed time is displayed in units of “minutes” and “seconds” through the display light.

  Similarly, a right fried food selection switch 99R is provided at the right end of the upper surface operation unit 61. When the user presses this switch once, the temperature of the oil in the fried food (tempura) pan by the right IH heating source 6R is initially set to 180 ° C. After that, the user can adjust the heating power of the right IH heating source 6R by operating the right operation dial 64R to set any appropriate temperature suitable for fried food, for example, 200 ° C.

  Each time the right deep-fried food selection switch 99R is pressed, the setting is cyclically changed from the normal deep-fried food mode → the small-scale deep-fried food mode → the deep-fried food mode release → the normal deep-fried food mode →... A buzzer will sound to inform you that the fried food mode has been changed. Here, the normal deep-fried food mode is a case where the amount of oil used for deep-fried food cooking is, for example, about 500 to 800 g, and the small-sized deep-fried food mode is about 200 to 500 g. Press to select.

  In addition, when fried food cooking is performed, information on the target temperature (for example, 180 ° C.) of fried food cooking is displayed on the right liquid crystal display unit 98R in “° C.” units. A small amount of deep-fried food mode lamp 99RS in the vicinity of the left side of the liquid crystal display unit 98R is lit to notify.

  Similarly to the right heating power setting operation unit 70, the left heating power setting operation unit 71 on the left side includes a left timer switch (not shown), a left liquid crystal display unit 98L, and a left fried food selection switch (not shown). One is provided. The left timer switch and the right timer switch 97R, the left liquid crystal display unit 98L and the right liquid crystal display unit 98R, and the left fried food selection switch and the right fried food selection switch 99R are respectively left and right center lines CL (see FIG. 3). ) Between the left and right.

  These right fried food selection switch 99R and left fried food selection switch correspond to the oil amount setting means of the present invention.

  When the deep-fried food selection switch 99R is pressed and cooking the deep-fried food, the preheating state of the oil is displayed using the right heating power display lamp 101R light emitting parts L3 to L6.

(Display means G)
As the display means G of the heating cooker in the first embodiment, a general display means 100, a thermal power display lamp 101, a liquid crystal display section 98, and the like are provided.

(General display means)
As shown in FIGS. 2 and 3, the integrated display means 100 is provided on the front side in the front-rear direction at the center in the left-right direction of the top plate 21. The integrated display means 100 is mainly composed of a liquid crystal panel having two display surfaces, and is provided near the lower surface of the top plate 21 so that display light is emitted from the lower surface thereof through the top plate 21 (transmitted). Is provided.

(Thermal power indicator lamp)
As shown in FIGS. 2 and 3, the magnitude of the heating power of the right IH heating source 6 </ b> R is displayed at the position between the right IH heating source 6 </ b> R and the right heating power setting operation unit 70 on the right front side of the top plate 21. A right thermal power display lamp 101R is provided. The right thermal power display lamp 101R is provided in the vicinity of the lower surface of the top plate 21 so that display light is emitted from the lower surface thereof through the top plate 21 (transmitted).
Similarly, a left heating power display lamp 101L that displays the magnitude of the heating power of the left IH heating source 6L is located at a position between the left IH heating source 6L and the left heating power setting operation unit 71 on the left front side of the top plate 21. It is provided in the vicinity of the lower surface of the top plate 21 so that display light is emitted from the lower surface thereof through the top plate 21 (transmitted). The thermal power indicator lamp may be laid out in the vicinity of 70, 71, 72 of the operation unit 61 so that the area of the top plate can be used effectively.
The right thermal power display lamp 101R and the left thermal power display lamp 101L correspond to the display unit of the present invention.

In addition, the right heating power display lamp 101R for the right IH heating source 6R can display, for example, eight steps from a heating power of 120 W to a maximum heating power of 2.5 kW as follows. Thermal power 1 (120W), Thermal power 2 (300W), Thermal power 3 (500W), Thermal power 4 (750W), Thermal power 5 (1000W), Thermal power 6 (1500W), Thermal power 7 (2000W), Thermal power 8 (2500W). In order to show these eight levels of thermal power with two colors of light emission, the right thermal power display lamp 101R linearly arranges the eight light emitting portions L1, L2, L3, L4, L5, L6, L7, and L8. In addition, two light emitting diodes (for example, blue and red) that emit light of different wavelengths are disposed in one light emitting unit. In addition, the number of the corresponding thermal power is printed under each light emission part L1-L8 (front side). For example, when the thermal power 1 is set, only the light emitting part corresponding to the left thermal power 1 is lit in red, and the seven light emitting parts on the right side of the light emitting part are all lit in blue. The user of the cooking device can easily see the red light from the top plate 21 surface.
In addition, the light emission part L9 which displays a heat retention mode is arrange | positioned on the left side of the light emission part corresponding to the thermal power 1. The light emitting portion L9 is turned off when not in the heat retention mode, and when in the heat retention mode, the light emitting portion L9 emits light in a color different from red (for example, orange), and all the eight light emitting portions on the right side thereof are lit in blue. The user can easily see from the surface of the top plate 21.
The left heating power display lamp 101L for the left IH heating source 6L is the same as the right heating power display lamp 101R for the right IH heating source 6R, and a description thereof will be omitted.
These eight light emitting portions correspond to the lamp group of the present invention, and each light emitting portion corresponds to the lamp of the present invention.

(Liquid crystal display)
The left liquid crystal display unit 98L and the right liquid crystal display unit 98R are also arranged at positions substantially related to the operation units 70, 71, and 72 corresponding to the respective heating sources in the same manner as the general display unit 100, and the display contents are adjusted according to the respective heating units. The information of each source is displayed mainly. For example, the right liquid crystal display unit 98R displays the frying temperature, the timer time, etc. relating to the operation of the right IH heating source 6R.

  The integrated display means 100 includes information on the operating states (thermal power, time, etc.) of the left IH heating source 6L, the right IH heating source 6R, the central heating source 7, the heaters 22 and 23 of the roaster heating chamber 9, and the operation means E. The input setting information is displayed.

(Roaster heating chamber 9)
As shown in FIG. 7, the front opening 105 of the roaster heating chamber 9 is covered with a door 13 so as to be freely opened and closed. The door 13 is held in the roaster heating chamber 9 by a support mechanism (not shown) so as to be movable in the front-rear direction. In addition, a window plate 106 made of heat-resistant glass is installed at the central opening 107 of the door 13 so that the inside of the roaster heating chamber 9 can be seen from the outside.

A front end of a metal tray 108 is connected to the door 13. When cooking with a lot of oil, a metal grill net 109 is usually placed on the tray 108 and used. As a result, when the door 13 is pulled forward, the tray 108 (including the grill 109 when the grill 109 is placed) is also pulled out to the front of the roaster heating chamber 9 when the door 13 is pulled forward.
Note that the tray 108 is normally detachably supported on both the left and right metal rails DL connected to the door 13 so that the tray 108 is detached from the metal rails DL alone. It can be done.

In addition, the shape of the grill 109 and the position and shape of the tray 108 are devised so that they cannot be pulled out by hitting the lower heater 23 when the tray 108 is pulled forward. Thus, in this roaster heating chamber 9, if meat, fish or other food is placed on the grill 109 and the heaters 22 and 23 are energized (simultaneously or time-divisionally energized), the food is heated from both the upper and lower sides. It has a “double-sided baking function”.
The roaster heating chamber 9 is provided with a temperature sensor (not shown) for detecting the room temperature, and cooking can be performed while maintaining the internal temperature at a desired temperature. .

  As shown in FIG. 7, the roaster heating chamber 9 has a cylindrical metal inner frame 111 having an opening 112 on the rear (back) side and a front opening 105 on the front side, and an outer side of the inner frame 111. It is composed of a predetermined (lower) gap 113, an (upper) gap 114, and an outer frame 115 that covers the left and right side gaps (not shown).

The outer frame 115 has five surfaces, that is, left and right side wall surfaces, an upper surface, a bottom surface, and a rear surface, and is entirely formed of a steel plate or the like. The inner surfaces of the inner frame 111 and the outer frame 115 form a coating having a good cleaning property such as an enamel or a heat resistant coating film.
Reference numeral 116 denotes an exhaust port formed in the upper part of the back wall surface of the outer frame 115.
Reference numeral 14 denotes an exhaust duct integrally formed outside the exhaust port 116. The exhaust duct 14 has a square or rectangular cross section, and is inclined obliquely upward as it goes downstream, and then bends in the vertical direction, and finally reaches the rear exhaust port 119 where the upper end opening 118 is formed in the upper frame 20. Communicate.
120 is a deodorizing catalyst. The deodorizing catalyst 120 is installed at a position downstream of the exhaust port 116 inside the exhaust duct 14. Then, it is activated by being heated by the catalyst heater 120H, and functions to remove odor components of hot air passing through the exhaust duct 14 from the inside of the roaster heating chamber 9.

  Reference numeral 110 denotes an annular (b-shaped) packing made of heat-resistant rubber, metal or the like which is attached over the entire inner periphery of the door 13 and is rich in elasticity. The tip of the packing 110 is in contact with the front surface around the front opening 105 of the roaster heating chamber 9 so that hot air does not leak outside between the roaster heating chamber 9 and the door 13.

(Exhaust structure / intake structure)

  The intake port 55A (see FIG. 5) at the top of the blower case 54 can introduce outside room air such as a kitchen into the main body A through a cover 130 (see FIG. 2) provided with communication holes. Yes.

  As shown in FIGS. 1, 2, and 7, the exhaust duct 14 is located in the exhaust chamber 12. In other words, the exhaust chamber 12 communicating with the space 52 formed around the roaster heating chamber 9 is secured on both the left and right sides of the exhaust duct 14.

As shown in FIG. 1, reference numeral 140 denotes a pair of vent holes formed in the rear partition plate 53. The vent hole 140 is formed in a portion away from the left and right side positions of the exhaust duct 14 by a predetermined dimension. The interior of the upper part chamber 10 communicates with the exhaust chamber 12 through the vent 140.
In FIG. 7, reference numeral 141 denotes a front partition plate erected on the front end portion of the partition plate 27. The front partition plate 141 is installed at a position where a gap 143 of about several millimeters for improving heat insulation is formed between the front partition plate 141 and the vertical wall 144 of the main body case 2 forming the flange 3A on the front. The portion extends to the lower surface of the upper frame 20.

  Reference numeral 145 denotes a gap. This gap 145 is formed between the rear partition plate 53 provided at the rear part of the partition plate 27 in order to form the exhaust chamber 12 different from the upper part chamber 10 and the exhaust duct 14. It is formed by a gap of about several mm for improving heat insulation.

  As shown in FIG. 5, 150 </ b> R is a right side mounted circuit board inside the electrical component chamber 8. The right mounting circuit board 150R is mounted with electric / electronic components that constitute the drive circuit of the right IH heating source 6R, and an inverter circuit for induction heating is formed. Reference numeral 150L denotes a left mounted circuit board. The left mounting circuit board 150L is mounted with electric / electronic components constituting a drive circuit for the left IH heating source 6L, and an inverter circuit for induction heating is formed.

Here, on the right mounting circuit board 150R and the left mounting circuit board 150L on which the inverter circuit and the like are formed, as shown in FIG. 8, a rectification circuit 221 connected to a commercial power supply of 100V or 200V, and the rectification circuit 221 Necessary for induction heating of the coil 222 connected to the DC output terminal, the smoothing capacitor 223, the resonance capacitor 224 connected to the coil 222 and the smoothing capacitor 223, and the IGBT 225 serving as a switching means connected to these components. Main circuit components are installed.
Details of the control circuit shown in FIG. 8 will be described later.

  In FIG. 5, 151R is an aluminum radiation fin mounted on the right mounting circuit board 150R. Reference numeral 151L denotes aluminum radiating fins mounted on the left mounting circuit board 150L. The heat radiation fins 151 </ b> R and 151 </ b> L are thermoelectrically attached to the IGBT 225 serving as the semiconductor switching means that generates heat in accordance with the power control operation of induction heating. Further, cooling air is supplied from the blower 57 in order to prevent a reduction in efficiency due to the high heat of the IGBT 225.

In FIG. 5, the right mounting circuit board 150R and the left mounting circuit board 150L are installed in two upper and lower stages, and a board support (not shown) so as to sandwich these boards from the front-rear direction of the paper surface. Supported by As a result, the electric component chamber 8 has an air passage 154 that is surrounded by a board support base on the left and right sides and has a ceiling surface formed of the left mounting circuit board 150 </ b> L itself. An air path 155 extending in the front-rear direction having a height H1 and having a ceiling surface formed by the partition plate 27 itself is formed.
And the air outlet 56 of the air blower case 54 of the air blower 57 is opposed to the rear part of these two independent air passages 154 and 155, and the cooling air from the air blower 57 is supplied to the two air passages 154 and 155. It has become so.

  The cooling air supplied from the blower 57 to the air passages 154 and 155 passes around the various electric components and the heat radiation fins 151R and 150L mounted on the right mounting circuit board 150R and the left mounting circuit board 150L. It cools and it introduce | transduces into the opening 44 (refer FIG. 6) provided in the partition plate 27 used as the ceiling surface of the upper air path 155. FIG.

Note that the heat generation amount of the right mounting circuit board 150R and the heat generation amount of the left mounting circuit board 150L may not be the same. For example, when the right IH heating source 6R is driven at a maximum heating power of 3 kW and the left IH heating source 6L is driven at a maximum heating power of 2.5 kW, the right mounted circuit board 150R generates a larger amount of heat, but the blower 57 The amount of air blown can sufficiently correspond to the amount of heat generated at the maximum heating power.
In addition, when the heat generation amount of the right mounting circuit board 150R is different from the heat generation amount of the left mounting circuit board 150L, the distribution of the cooling air blowing amount from the blower 57 to the two air paths 154 and 155 may be adjusted. As a method for distributing the air flow, for example, the distribution of the air flow can be adjusted by adjusting the position of the air outlet 56 with respect to the air paths 154 and 155 up and down. Or conversely, the distribution of the air flow rate can be adjusted by adjusting the vertical positions of the right mounting circuit board 150R and the left mounting circuit board 150L.

  In the above description, it is assumed that both the right IH heating coil 6RC and the left IH heating coil 6LC can be cooled by using one cooling fan 57. If there is a concern that the capacity will be insufficient, it can be dealt with by providing a plurality of cooling fans 57. When a plurality of blowers 57 are provided, it is not necessary to use the same type of blower. For example, an axial blower and a centrifugal blower may be combined.

(Auxiliary cooling structure)
In FIG. 5, 160 is an auxiliary cooling fan (auxiliary blower). The auxiliary cooling fan 160 is an axial flow fan, faces a vent (not shown) provided in the partition plate 27 and is fixed to the partition plate 27, and the suction port is a space below the partition plate 27. It is exposed to. The auxiliary cooling fan 160 sucks the cooling air from the blower 57 coming out from the outlet sides of the two air passages 154 and 155 and sends it to the space above the partition plate 27, that is, the front space of the upper part chamber 10. As a result, the electrical components such as the liquid crystal substrate of the integrated display means 100 in the front space of the upper component chamber 10 are cooled. The auxiliary cooling fan 160 is driven by a motor drive circuit 231 (see FIG. 8).

Reference numeral 162 denotes a partition wall having a shape in which the inner side of the front operation frame 62 (see FIG. 1) is expanded toward the electrical component chamber 8 side. Various control switches (not shown) of the front operation unit 60 (see FIG. 1) are housed in an internal space 163 defined between the inner wall surface of the partition wall 162 and the front operation frame 62. .
Reference numeral 164 denotes a vent hole formed in the rear wall of the partition wall 162. Reference numeral 165 denotes a ventilation hole provided on the wall surface of the ceiling of the partition wall 162. A part of the cooling air from the blower 57 enters through the ventilation hole 164, cools the internal space 163, and is discharged from the ventilation hole 165.

(Auxiliary exhaust structure)
As shown in FIG. 7, a bottom 170 having a shape recessed downward by one step is formed downstream of the deodorizing catalyst 120 in the exhaust duct 14.
Reference numeral 171 denotes an exhaust / vent hole formed in the center of the bottom 170. When hot exhaust from the roaster heating chamber 9 naturally rises and exhausts the exhaust duct 14 due to the pressure difference between the inside and outside, the air inside the main body A is attracted from the exhaust / vent hole 171 as indicated by the arrow Y5. . Thereby, the air in the space around the roaster heating chamber 9 can be gradually exhausted from the upper end opening 118 of the exhaust duct 14.

(Control means F)
As shown in FIG. 8, the control means F is formed by an energization control circuit 200 configured by incorporating one or a plurality of microcomputers.
The energization control circuit 200 includes an input unit 201, an output unit 202, a storage unit 203, and an arithmetic control unit 204. The energization control circuit 200 serves as a central control means for controlling all the heating sources and the display means G by being supplied with DC power via a constant voltage circuit (not shown).

In FIG. 8, an inverter circuit 210R of the right IH heating source 6R is connected to a commercial power supply of 100V or 200V voltage via a rectifier circuit 221 (also referred to as a rectifier bridge circuit).
Similarly, an inverter circuit 210L of the left IH heating source 6L is connected to the commercial power supply via a rectifier circuit 221 (not shown) in parallel with the inverter circuit 210R of the right IH heating source 6R.
Reference numeral 211 denotes a heater drive circuit for the central heating source 7. A heater drive circuit 212 drives the heater 22 for heating the inside of the roaster heating chamber 9. Reference numeral 213 denotes a heater drive circuit that drives the heater 23 for heating the inside of the roaster heating chamber 9. Reference numeral 214 denotes a heater drive circuit for driving the catalyst heater 120H provided in the middle of the exhaust duct 14. Reference numeral 215 denotes a drive circuit that drives the liquid crystal screen of the integrated display means 100. Reference numeral 230 denotes a drive circuit for the motor 59 of the blower 57 for keeping the internal space of the main body A in a certain temperature range. Reference numeral 231 denotes a motor drive circuit of the motor 161 of the auxiliary cooling fan 160 fixed to the partition plate 27. Reference numeral 232 denotes a drive circuit that drives the right display lamp 101R to turn on and off. Reference numeral 233 denotes a drive circuit that drives the left display lamp 101L to turn on and off.
In addition, setting information from the front operation unit 60 and the upper operation unit 61 is input to the energization control circuit 200.

In FIG. 9, the display control unit 101RC is in the output unit 202 and controls the right display lamp driving circuit 232. The drive light emitting unit determination unit 101RD is in the display control unit 101RC, and, as will be described later, the right heating power display lamp 101R corresponding to the normal deep-fried food mode and the small-scale deep-fried food mode selected by the number of times of the right deep-fried food selection switch 99R. Among these, the light emission part used for lighting in the preheating stage is determined.
The left display lamp driving circuit 233 has the same configuration.

  The inverter circuit 210R of the right IH heating source 6R is connected to the right IH heating coil 6RC (induction heating coil) shown in FIG. 6, the rectifier circuit 221 having the input side connected to the bus of the commercial power supply, and the DC side output terminal. A DC circuit composed of the coil 222 and the smoothing capacitor 223, a resonance circuit composed of a parallel circuit of the right IH heating coil 6RC and the resonance capacitor 224, one end of which is connected to a connection point between the coil 222 and the smoothing capacitor 223; An IGBT 225 serving as switching means having a collector connected to the other end of the resonance circuit.

  The emitter of the IGBT 225 is connected to a common connection point between the smoothing capacitor 223 and the rectifier circuit 221. The flywheel diode 226 is connected between the emitter and collector of the IGBT 225 so that the anode is on the emitter side.

Reference numeral 227 denotes a current detection sensor. The current detection sensor 227 detects a current flowing through a resonance circuit composed of a parallel circuit of the right IH heating coil 6RC and the resonance capacitor 224. The detection output of the current detection sensor 227 is supplied to the input unit 201 of the energization control circuit 200. When a pan or the like inappropriate for induction heating is used, or when a certain accident occurs, the detected current output is greater than a predetermined value. When an undercurrent or excessive current of the difference is detected, the IGBT 225 is controlled by the energization control circuit 200 via the drive circuit 228, and the energization of the right IH heating coil 6RC is instantaneously stopped.
Similarly, the inverter circuit 210L of the left IH heating source 6L has a circuit configuration equivalent to that of the right heating source circuit 206R and will not be described, but 6LC is a left IH heating coil and 224L is a resonance capacitor.

  Although not shown, the current detection sensor 227 is similarly provided in the inverter circuit 210L of the left IH heating source 6L. The current detection sensor 227 includes a shunt that measures current using a resistor and a method that uses a current transformer.

In the heating cooker that heats the object N to be heated by the induction heating method as in the first embodiment, the power control circuit for flowing high-frequency power to the heating coils 6RC and 6LC is called a so-called resonant inverter. Yes.
A configuration in which an IGBT 225 which is a switching circuit element is turned on / off at a driving frequency of about 20 to 40 KHz to a circuit in which the inductance of the heating coils 6RC and 6LC including the object to be heated N (metal object) and the resonance capacitor 224 are connected. It is.
The resonance type inverter includes a current resonance type that is said to be suitable for a 200 V power supply and a voltage resonance type that is said to be suitable for a 100 V power supply.
The configuration of such a resonant inverter circuit is divided into so-called half-bridge circuit and full-bridge circuit depending on how the connection destination of the heating coils 6RC, 6LC and the resonant capacitor 224 is switched by the relay circuit. .

When the object to be heated N is induction-heated using a resonant inverter circuit, if the object to be heated N is a magnetic material such as iron or magnetic stainless steel, the resistance component (equivalent resistance) that contributes to heating is large, and the electric power is It is easy to heat up because it is easy to put in, but when the object to be heated N is a non-magnetic material such as aluminum, the equivalent resistance is small, so that the eddy current induced in the object to be heated N is unlikely to be changed to the Joule heat. For this reason, when it is determined that the material of the object to be heated N is a magnetic material, the inverter circuit configuration is automatically changed to the half-bridge method, and in the case of the object to be heated N using a magnetic material, the full bridge is used. It is known to perform control of switching to a method (for example, Japanese Patent Laid-Open Nos. 5-251172, 9-185986, and 2007-80751).
In the present embodiment, unless otherwise specified, inverter circuits 210R and 210L may be configured as a half bridge circuit or a full bridge circuit.

  As described above, when the object to be heated N (metal object) is induction-heated by energization of the heating coils 6RC and 6LC, in the case of the object to be heated N of a magnetic material such as iron, switching is performed to the circuit to which the resonance capacitor 224 is connected. The IGBT 225 which is a circuit element is controlled to be turned on / off at a driving frequency of about 20 to 40 KHz, and a current having a frequency of about 20 to 40 KHz is allowed to flow.

(Temperature detection circuit)
In FIG. 8, 240 is a temperature detection circuit. Temperature detection information from the following temperature detection elements is input to the temperature detection circuit 240.
(1) A temperature detection element 31R provided at the center of the right IH heating coil 6RC.
(2) A temperature detection element 31L provided at the center of the left IH heating coil 6LC.
(3) A temperature detecting element 241 provided in the vicinity of the electric heater of the central heating source 7.
(4) A temperature detecting element 242 for detecting the internal temperature of the roaster heating chamber 9.
(5) A temperature detection element 243 installed in the vicinity of the integrated display means 100.
(6) A temperature detecting element 244 attached in close contact with the heat dissipating fin 151R in the electric component chamber 8.
(7) A temperature detecting element 245 attached in close contact with the heat dissipating fin 151L in the electric component chamber 8.

  Two or more temperature detection elements may be provided for the temperature detection object. For example, the temperature detection element 31R of the right IH heating source 6R may be provided in the central portion and the outer peripheral portion of the right IH heating coil 6RC to achieve more accurate temperature control. Further, the temperature detection element may be configured by using a different principle. For example, the temperature detection element at the center of the right IH heating coil 6RC may be an infrared type, and the one provided at the outer peripheral part may be a thermistor type.

The drive circuit 230 of the motor 59 of the blower 57 always operates the blower 57 and supplies cooling air according to the temperature measurement status from the temperature detection circuit 240 so that each temperature measurement portion does not become higher than a predetermined temperature. To cool each part.
The motor drive circuit 231 of the motor 161 of the auxiliary cooling fan 160 requires the energization control circuit 200 based on the temperature detection information from the temperature detection circuit 240 so that the liquid crystal screen portion of the integrated display means 100 does not become higher than a predetermined temperature. It is driven by judging the operation state (the magnitude of the blown amount).

(Top operation structure)
As shown in FIG. 10, the upper surface operation unit 61 is located above the flange 2T of the front flange plate 2B made of a metal plate that is fixed to the front end portion of the upper surface opening 2SP of the main body case 2.
The upper surface operation unit 61 includes a resin substrate case 250, a press operation type switch 251 attached to the upper surface of the substrate case 250, a substrate 253 on which an electronic component element 252 and the like are mounted, and the switch 251. A push button case 254 having a push button 254A, and a membrane sheet 255 having an outer peripheral edge adhered to the front frame 123 so as to cover the push button case 254. have. Reference numeral 20E denotes a through hole formed in the upper frame 20 for passing the push button 254A.

The push button case 254 is attached to the frame of the substrate case 250 so as to cover the substrate 253.
255A is a push button support piece rich in elasticity. The push button 254A is supported on the push button case 254 by the push button support piece 255A. That is, when the push button 254A is pushed down by the user, the push button 254A is moved downward by a predetermined dimension of about 1 mm to several mm, the push operation type switch 251 is closed, and the push button 254A is pushed from that state. When the operation is stopped, the push button support piece 255A returns to its original upper position due to its resiliency, and the push operation type switch 251 is opened.

(Operation of the heating cooker)
Next, the outline | summary of operation | movement of the heating cooker which consists of said structure is demonstrated.
A basic operation program from turning on the power to starting cooking preparation is stored in the storage unit 203 in the energization control circuit 200.
First, the power plug is connected to a 200V commercial power source, and the power is turned on by pressing the operation button 63A of the main power switch 63 (see FIG. 1).

Then, a predetermined power supply voltage is supplied to the energization control circuit 200 via a constant voltage circuit (not shown), and the energization control circuit 200 is activated.
First, the energization control circuit 200 performs self-diagnosis by the control program of the energization control circuit 200 itself, and performs an abnormality monitoring process before cooking.

The temperature detection circuit 240 reads the temperature data from the temperature detection elements 31R, 31L, 241, 242, 243, 244, and 245 provided at a total of seven locations, and sends the temperature data to the energization control circuit 200.
As described above, in the energization control circuit 200, data such as circuit currents, voltages, and temperatures of main components are collected, and thus abnormal heating determination is performed as abnormality monitoring control before cooking. For example, when the temperature around the liquid crystal substrate of the integrated display means 100 detected by the temperature detection element 243 is higher than the heat resistant temperature (for example, 70 ° C.) of the liquid crystal display substrate, it is determined that the temperature is abnormally high.

Further, the current detection sensor 227 provided in the inverter circuit 210R of the right IH heating source 6R detects a current flowing in a resonance circuit composed of a parallel circuit of the right IH heating coil 6RC and the resonance capacitor 224, and energizes this detection result. This is supplied to the input unit 201 of the control circuit 200.
Similarly, the current detection sensor 227 provided in the inverter circuit 210L of the left IH heating source 6L detects a current flowing in a resonance circuit composed of a parallel circuit of the left IH heating coil 6LC and the resonance capacitor 224, and the detection result is obtained. This is supplied to the input unit 201 of the energization control circuit 200.
The energization control circuit 200 compares the current detection result of the resonance circuit input to the input unit 201 with the normal current value of the determination reference data stored in the storage unit 203, and detects an undercurrent or an overcurrent. If it is, it is determined that there is some kind of accident or poor continuity, and it is determined as abnormal.

When there is no abnormality determination by the above self-diagnosis steps, “cooking start preparation is completed”. If there is no abnormality, the energization control circuit 200 preliminarily drives the drive circuit 230 that drives the motor 59 of the blower 57.
The energization control circuit 200 preliminarily drives a motor drive circuit 231 that drives the motor 161 of the auxiliary cooling fan 160. Further, the motor drive circuit 231 drives the motor 161 with a predetermined rated current and starts the operation of the auxiliary cooling fan 160.
Further, the energization control circuit 200 preliminarily activates the inverter circuit 210R of the right IH heating source 6R, the inverter circuit 210R of the right IH heating source 6R, and the driving circuit 215 of the integrated display unit 100, respectively.
However, when an abnormality determination is made, the energization control circuit 200 performs a predetermined abnormality process and is unable to start cooking.

(Cooking mode)
Next, the operation when the cooking mode is shifted to after the above-described abnormality monitoring process before cooking will be described using the right IH heating source 6R as an example.
First, the user turns the right operation dial 64R of the front operation unit 60 to the right or left (the heating power is set according to the amount of rotation).

An operation signal from the front operation unit 60 is input to the energization control circuit 200. The energization control circuit 200 receives operation signals from various switch operation keys (for example, operation switches such as the thermal power keys 74, 75, and 76 and the right timer switch 97R) from the upper surface operation unit 61. And cooking conditions, such as a heat-power level and a heating time, are set.
Next, the energization control circuit 200 drives the drive circuit 228 of the inverter circuit 210R based on the set cooking condition, and drives the inverter circuit 210R of the right IH heating source 6R. Then, when the drive circuit 228 applies a drive voltage to the gate of the IGBT 225, a high-frequency current flows through the right IH heating coil 6RC.
As a result, the pan of the object to be heated N becomes hot due to the high frequency magnetic flux from the right IH heating coil 6RC, and the electromagnetic induction heating cooking operation (cooking mode) is started.
The energization control circuit 200 drives the drive circuit 215 of the integrated display unit 100 to display cooking condition information such as heating power and cooking time on the display area of the integrated display unit 100.

(Electromagnetic induction heating and thermal power control)
A commercial power source is connected to the rectifier circuit 221 of the inverter circuit 210R. From this commercial power supply, a low frequency alternating current and voltage of 50 Hz or 60 Hz are supplied.
The rectifier circuit 221 is a circuit that rectifies an alternating current of a commercial power source into a direct current, and is configured by, for example, connecting two thyristors and two diodes in a bridge connection (specific configuration is disclosed in, for example, Japanese Patent Laid-Open No. 1-246783). Of FIG. 1).
The smoothing capacitor 223 is a capacitor having a relatively large capacity for removing the ripple current, and smoothes the pulsating current rectified by the rectifier circuit 221.

The direct current obtained by the rectifier circuit 221 and the smoothing capacitor 223 is input to the collector of the IGBT 225 that is a switching element. On / off control of the IGBT 225 is performed by inputting a drive signal from the drive circuit 228 to the base of the IGBT 225. A high frequency current is generated in the right IH heating coil 6RC by combining the on / off control of the IGBT 225 and the resonance capacitor 224. Due to the electromagnetic induction effect brought about by the high-frequency current, an eddy current is generated in the heated object N such as a pan placed on the top plate 21 above the right IH heating coil 6RC.
Thus, the eddy current generated in the heated object N becomes Joule heat, and the heated object N generates heat, which can be used for cooking.

  The drive circuit 228 has an oscillation circuit (not shown). A drive signal generated by the oscillation circuit is supplied to the base of the IGBT 225 to control the IGBT 225 on and off. By adjusting the oscillation frequency and oscillation timing of the oscillation circuit of the drive circuit 228, the conduction ratio, conduction timing, current frequency, etc. of the right IH heating coil 6RC are adjusted, and the heating power of the right IH heating coil 6RC can be adjusted. .

  In addition, since the configuration in which the oscillation circuit is variable causes a difference in oscillation frequency between the stoves in a multi-port stove, Japanese Patent No. 2532565, Japanese Patent Laid-Open No. 9-185985, etc. are proposed as means for solving the problem. Has been.

(Demand control)
In the case of having a large number of heating means (the right IH heating source 6R, the left IH heating source 6L, the central heating source 7, and the heaters 22, 23) that can be used simultaneously like the heating cooker of the first embodiment, It is necessary to control the maximum settable thermal power of each heating means so that the total input current when using multiple heating means at the same time does not exceed the current capacity limit of the domestic distribution board (if it exceeds, the breaker of the distribution board Will be blocked).
For example, if the total power capacity is 4.8 kW at the maximum, the left IH heating source 6L is 3 kW, and the right IH heating source 6R is 2.5 kW, setting both heating sources to the maximum heating power at the same time will result in 5.5 kW. Will be exceeded.

  Therefore, in the state where the left IH heating source 6L is already operated with a heating power of 3 kW, the energization control circuit 200 has a heating power of the right IH heating source 6R of (total power capacity 4.8 kW) − (left IH heating source 6L). The heating power setting range of the right IH heating source 6R is limited so as not to exceed (heating power 3 kW) = (1.8 kW).

Alternatively, when setting the heating power exceeding 1.8 kW to the right IH heating source 6R, the energization control circuit 200 can also be controlled to automatically reduce the heating power of the left IH heating source 6L. .
Further, the energization control circuit 200 may set a predetermined priority order for each heating unit, and may sequentially assign the heating power of each heating unit in preference to the heating unit having a higher priority.
For example, the total power limit is 4.8 kW, and the maximum heating power of the left IH heating source 6L, the right IH heating source 6R, the central heating source 7, and the grille (heaters 22, 23) is 3 kW, 2.5 kW, 1. In the case of 5 kW and 2 kW (total value of the heaters 22 and 23), the heating power of the left IH heating source 6L is given when the priority of each heating means is 1st, 2nd, 4th and 3rd respectively. When 3 kW is set, the maximum heating power of the right IH heating source 6R is 1.8 kW, and when the maximum 1.8 kW is actually set as the heating power of the right IH heating source 6R, it can be set to the central heating source 7 and the grill. Each firepower is 0.

  Also, when 1 kW is set as the heating power of the left IH heating source 6L under these conditions, the right IH heating source 6R can set the heating power up to 2.5 kW, but the right IH heating source 6R is set to the heating power of 2.5 kW. Even if it goes, the total thermal power is 3.5 kW, so there is 1.3 kW of surplus power up to the total power limit of 4.8 kW. Therefore, the heating power of up to 1.3 kW is allowed for the grill, and the difference between the heating power set for the grill and the maximum allowable heating power is the maximum heating power allowed for the central heating source 7.

  The heating power value of each heating means is calculated by using various switch operation keys (for example, heating power keys 74, 75, 76, roaster) of the right heating power setting operation section 70, the central operation section 72, and the left heating power setting operation section 71 of the upper surface operation section 61. The setting value of the operation switch for starting energization of the heaters 22 and 23 in the heating chamber 9 may be used directly, or the various switch operation keys are connected to the IH heating coil through the energization control circuit 200 and the drive circuit 228. The detected current may be detected by the current detection sensor 227, and the heating power may be obtained from the detected current value.

(Abnormal monitoring during cooking)
The cooking device according to Embodiment 1 performs abnormality monitoring control even during cooking.
During cooking, the energization control circuit 200 determines whether the current value detected by the current detection sensor 227 is an undercurrent or an overcurrent compared to a normal current value.
If the current value detected by the current detection sensor 227 is an undercurrent or an overcurrent, the energization control circuit 200 controls the IGBT 225 via the drive circuit 228 and instantaneously stops energization of the right IH heating coil 6RC. .
In addition to the temperature detecting element 31R provided at the center of the right IH heating coil 6RC, the portion where the temperature rises during cooking includes two radiating fins 151R and 151L installed inside the electrical component chamber 8 The part of the integrated display means 100 located inside the upper part chamber 10 can be considered.
Therefore, the energization control circuit 200 monitors the temperature data from the temperature detection elements 31R, 31L, 241, 242, 243, 244, and 245 via the temperature detection circuit 240 to monitor whether or not the temperature is abnormal. To do.

If the abnormality is determined to be abnormally high, the energization control circuit 200 executes a predetermined abnormality correction process.
For example, if the energization control circuit 200 determines that the right IH heating source 6R is at an abnormally high temperature, it controls the drive circuit 230 of the motor 59 to increase the rotational speed of the blower 57 and increase the cooling air volume. If the effect of improvement does not appear even if this is continued for a predetermined time, the heating power (electric power) of the right IH heating source 6R is forcibly lowered (from what the user has set). For example, it is reduced to the maximum thermal power among the three of the thermal power under one stage, the thermal power under 300 W, or the thermal power of 10% (lower to 2.7 kW when used with 3 kW thermal power).
When such an abnormality correction process is executed, the energization control circuit 200 drives the drive circuit 215 of the integrated display unit 100 to notify the predetermined display area of the integrated display unit 100 that the heating power is automatically lowered. Is displayed.

Then, the energization control circuit 200 determines again whether or not the high temperature abnormal state has been resolved within a predetermined short time from the time when it is determined that the abnormality has occurred in the right IH heating source 6R. In the energization control circuit 200, the detection temperature of the temperature detection element 31R of the right IH heating source 6R is a predetermined temperature (for example, 300 ° C.) or the detection temperature of the temperature detection element 243 of the liquid crystal display substrate of the integrated display means 100 is When the temperature reaches a predetermined temperature (for example, 70 ° C.), the energization of the right IH heating source 6R is immediately stopped.
When the energization is stopped, the energization control circuit 200 drives the drive circuit 215 of the integrated display unit 100 and causes the integrated display unit 100 to display information indicating that the right IH heating source 6R has been automatically stopped. Therefore, when the user looks at the screen display of the integrated display means 100, it is easy to understand that the automatic stop has occurred due to abnormal temperature rise.

When a command to stop energization of the right IH heating source 6R is issued, energization of the right IH heating source 6R is stopped, but the cooling for cooling the right IH heating coil 6RC of the right IH heating source 6R is performed. The blower 57 continues to operate for 2 minutes to 5 minutes even after the energization is stopped. Thereby, the hot air stays in the vicinity of the right IH heating source 6R immediately after the stop of the blowing from the cooling blower 57, and the overshoot problem that the temperature rises rapidly can be prevented. Further, it is possible to prevent the adverse effect that the temperature of the integrated display unit 100 becomes high.
This operation continuation time is determined from a formula or numerical table that is determined in advance by the energization control circuit 200 in accordance with conditions such as the temperature rise until the energization is stopped, the room temperature, and the operating heat power level of the heating source.

  However, when it is found that the blower 57 itself is out of order, such as when an abnormal current from the cooling blower 57 is detected (for example, when only the temperature of the radiating fin 151R is rising), the cooling is performed. The energization of the air blower 57 is also stopped simultaneously.

  The auxiliary cooling fan 160 is operated while the cooling fan 57 is operated. Further, even when the cooling fan 57 is abnormally stopped, the auxiliary cooling fan 160 also serves to supply cold air to the integrated display means 100, so that the operation is continued.

The liquid crystal display substrate of the integrated display means 100 is heated by reflected heat from the bottom of the heated object N or radiant heat from the top plate 21 during cooking by the right IH heating source 6R and the left IH heating source 6L. . Further, when the used hot tempura pan is placed on the central portion of the top plate 21 as it is, it receives heat from the hot pan (near 200 ° C.).
Therefore, in the first embodiment, air cooling is performed from the right side by the auxiliary cooling fan 160 in order to suppress the temperature increase of the integrated display unit 100.

  Next, operations of the display device and the heating cooker according to the present invention will be described based on the flowchart of FIG.

  A predetermined heated object N (for example, the dedicated tempura pan of Embodiment 1 containing tempura oil) is placed on the right IH heating source 6R of the top plate 21, and the main power switch is turned on (operation) in step S1. Button 63A is pressed).

  When the right operation dial 64R is pushed out in step S2, a buzzer sound 1 (frequency 2 kHz for 0.1 second) sounds.

  When the right operation dial 64R is turned left or right in step S3, the right heating power display lamp 101R is lit in blue in step S4.

  When the right deep-fried food selection switch 99R (also referred to as a deep-fried food key) is pressed once in step S5, a buzzer sound 1 sounds in step S6, and the process proceeds to the normal deep-fried food mode in step S7.

  When the right deep-fried food selection switch 99R is pressed twice in step S19, a buzzer sound 2 (frequency 4 kHz for 0.1 second) sounds in step S20, and the process proceeds to the small-scale deep-fried food mode in step S21.

  When the right deep-fried food selection switch 99R is pressed three times in step S28, a buzzer sound 3 (0.5 seconds at a frequency of 2 kHz) sounds in step S29, and the process returns to step S4 to release the deep-fried food function and wait for heating. Return to.

  After shifting to the normal deep-fried food mode and the small-scale deep-fried food mode in steps S7 and S21, respectively, it is determined whether the right operation dial 64R is turned in steps S8 and S22, respectively.

  When the set temperature is changed by turning the right operation dial 64R in each of steps S8 and S22, the set temperature is displayed on the right liquid crystal display unit 98R. For example, the temperature setting in Embodiment 1 can be set in increments of 10 ° C. from 100 to 200 ° C. This set temperature corresponds to the preset target temperature of the present invention.

  When the temperature is changed with the right operation dial 64R in Step S10 and Step 24 and 3 seconds have elapsed, the buzzer sound 1 sounds in Step S11 and Step 25, and preheating is started in Step S12 and Step S26. . The light emitting section of the right heating power display lamp 101R is lit and blinks to display the change in temperature of the object to be heated during preheating. This progress display mode will be described later.

  If the right operation dial 64R is not turned at step S8 and step S22, the fried food key, which is the last operation at step S10 and step S24, is pressed once and the fried food key is pressed twice. If the second has elapsed, the buzzer sound 1 sounds in step 11 and step S25, respectively, and preheating is started, and the light emitting portion of the right thermal power display lamp 101R is turned on / flashes to display the progress during preheating. This progress display mode will also be described later.

Further, when the right operation dial 64R is turned during preheating in steps S12 to S15 and steps S26 to S27, the set temperature can be changed again, and when the right operation dial 64R is pushed in or right-fried food When selection switch 99R is pressed, the deep-fried food mode is canceled.

  In step S16, it is determined whether or not the set temperature has been reached. If it has reached, the buzzer sound 4 in step S17 (repeated twice ON / OFF for 0.1 seconds and ON / OFF for 0.5 seconds at a frequency of 2 kHz). And the preheating is completed in step S18, and the light emitting portions L3 to L6 (normal mode) and the light emitting portions L3 to L4 (small amount mode) of the right heating power display lamp 101R are turned on to notify that the preheating is completed. . If the set temperature is not reached in step S16, preheating is continued.

  Next, the operation of the light emitting units L1 to L8 of the right thermal power display lamp 101R of the present invention will be described with reference to the flowchart of FIG. 12, FIG. 13, FIG. 14, FIG. 15, FIG.

  FIG. 13A shows the light emitting portions L1 to L8 when the main power switch in step S1 is set to “ON” and the right operation dial 64R is pushed out in step S2. All the light emitting portions L1 to L8 are turned off. . Hereinafter, the white squares represent the state of being turned off. FIG. 13B is a diagram when the right operation dial 64R of Step S3 is turned to the left or right to enter the heating standby state, and the light emitting portions L1 to L8 are lit in blue. Hereinafter, the hatched square in FIG. 13B represents a state where the light emitting portion is lit in blue.

  FIG. 14A shows the light emitting portions L1 to L8 when the right deep-fried food selection switch 99R is pressed once in step S5 to shift to the normal fried food mode, and only the light emitting portions L3 to L6 are lit in blue. Here, the four light emitting units L3 to L6 are light emitting units that are used for lighting in the preheating stage of the normal deep-fried food mode, and are determined by the drive light emission determining unit 101RD. As will be described later, the display control unit 101RC performs control to change the light emitting units L3 to L6 from blue to pink (blue and red are turned on simultaneously) as the temperature rises.

  Fig.15 (a) shows the light emission parts L1-L8 when the right deep-fried food selection switch 99R is pushed twice in step S19, and it transfers to a small amount deep-fried food mode, and only the light emission parts L3-L4 are lit blue. Here, the two light emitting units L3 to L4 are light emitting units that are used for lighting in the preheating stage of the small amount fried food mode, and are determined by the driving light emission determining unit 101RD. As will be described later, the display control unit 101RC performs control to change the light emitting units L3 to L4 from blue to pink (blue and red are turned on simultaneously) as the temperature rises.

  FIG. 13B shows that when the deep-fried food selection switch 99R is pressed three times in step S28 to release the deep-fried food mode, or during the preheating from step S11 to step 15, the right deep-fried food selection switch 99R is pressed. The light emitting units L1 to L8 at that time return to the state where the light emitting units L1 to L8 are lit in blue (heating standby state).

  FIG.14 (b) is the light emission parts L1-L8 at the time of the preheating stage 1 in a normal fried food mode in step S12, the light emission part L3 is blinking display of blue and pink, and the light emission parts L4-6 light blue. Yes. Hereinafter, the gray square shown in the light emitting portion L3 represents a pink lighting state, and when it is surrounded by a dotted line, it represents a state of alternately flashing blue and pink.

  FIG.14 (c) is the light emission parts L1-L8 at the time of the preheating stage 2 in a normal fried food mode in step S13, the light emission part L3 lights in pink, the light emission part L4 is blinking display of blue and pink, and the light emission part L5 to L6 are lit blue.

  FIG.14 (d) is the light emission parts L1-L8 at the time of the preheating stage 3 in a normal fried food mode in step S14, the light emission part L5 is blinking display of blue and pink, and the light emission parts L2-L4 are lit in pink. The light emitting portion L6 is lit blue.

  FIG.14 (e) is light emission part L1-L8 at the time of the preheating stage 4 in a normal fried food mode in step S15, the light emission part L6 is blinking display of blue and pink, and the light emission parts L3-5 light in pink. ing.

  FIG.14 (f) is the light emission parts L1-L8 at the time of the completion of preheating in normal fried food mode in step S18, and the light emission parts L3-L6 are lit in pink.

  FIG.15 (b) is the light emission parts L1-L8 at the time of the preheating stage 1 in a small amount fried food mode in step S26, the light emission part L3 is blinking display of blue and pink, and the light emission part L4 is lit blue.

  FIG.15 (c) is the light emission parts L1-L8 at the time of the preheating stage 2 in a small amount fried food mode in step S27, the light emission part L4 is blinking display of blue and pink, and the light emission part L3 is lit in pink. .

  FIG.15 (d) is the light emission parts L1-8 at the time of the preheating completion in a small amount deep-fried food mode in S18, and the light emission parts L3-L4 are lit in pink.

  Next, operations of the right liquid crystal display unit 98R and the small amount fried food mode lamp 99RS of the present invention will be described with reference to the flowchart of FIG. 12 and FIG.

  FIG. 18A shows the right liquid crystal display unit 98R and the small fried food mode lamp 99RS when the main power switch in step S1 is set to “ON” and the right operation dial 64R is pushed out in step S2. The backlight is turned off, and the small fried food mode lamp 99RS is also turned off. FIG. 18B is a diagram when the right operation dial 64R is turned to the left or right in Step S3 to enter the heating standby state. The backlight of the right liquid crystal display unit 98R is lit white and “0”. Is displayed, and the small-scale deep-fried food mode lamp 99RS is turned off.

  FIG. 18C shows the right liquid crystal display unit 98R and the small amount deep-fried food mode lamp 99RS when the right deep-fried food selection switch 99R is pressed once in step S5 and the mode is changed to the normal deep-fried food mode. The backlight remains lit white and displays “Fried food 180 ° C.”, and the small-scale deep-fried food mode lamp 99RS is extinguished.

  FIG. 18D shows the right liquid crystal display portion 98R and the small amount deep-fried food mode lamp 99RS when the right deep-fried food selection switch 99R is pressed twice in step S19 to shift to the small-scale deep-fried food mode, and the right liquid crystal display portion 98R is shown. The backlight of the left is lit white and displays “fried food 180 ° C.”, and the small-scale deep-fried food mode lamp 99RS is lit red.

  Here, the relationship between the preheating stage and the object N to be heated will be described with reference to FIGS. 16 and 17.

  FIGS. 16 (a) and 16 (b) show the case of the normal deep-fried food mode and the case of the small-scale deep-fried food mode, respectively, the horizontal axis represents the time after the transition to the preheating stage, and the vertical axis represents the temperature of the heated object N. It is. The target temperature is Tg in advance. The temperature at the time of transition to the preheating stage (time t0) is T0.

  With respect to FIG. 16A, a temperature lower than a predetermined value α, a temperature lower than a predetermined value β, a temperature lower than a predetermined value γ, and a temperature lower than 0 ° C. (Tg) with respect to the target temperature Tg are determined. The time to reach each temperature is t1, t2, t3, t4. Time t0 to t1 corresponds to preheating 1 stage, time t1 to t2 corresponds to preheating 2 stages, time t2 to t3 corresponds to preheating 3 stages, and time t3 to t4 corresponds to preheating 4 stages. Here, for example, the target value Tg is set to 180 ° C., and the predetermined values α, β, and γ are set to 60 ° C., 40 ° C., and 20 ° C., respectively.

  About FIG.16 (b), since the oil quantity with which the to-be-heated material N is fried cooking is small compared with the case of normal fried food mode, the heat capacity of the to-be-heated material N also becomes small. Therefore, when the temperature of the object to be heated at the time t0 when the transition to the preheating stage is the same T0 as in FIG. 16 (a), the time t6 reaching the target temperature Tg is earlier than the time t4 in the normal deep-fried food mode. . Temperatures that are lower than the target temperature Tg by a predetermined value β and temperatures (Tg) that are 0 ° C. lower than the target temperature Tg, and times when the temperature of the heated object N reaches the respective temperatures are t5 and t6. From time t0 to t5 corresponds to one stage of preheating, and from time t5 to t6 corresponds to two stages of preheating.

  FIG. 16 shows a case where the preheating stage is determined by dividing the temperature raising stage until the target temperature Tg is reached, but the temperature overshoots after reaching the target temperature Tg as shown in FIG. The preheating stage may be determined by dividing the stage from when the power to the heating means is turned off to the temperature to reach the target temperature Tg again.

  17 (a) and 17 (b) show the case of the normal deep-fried food mode and the case of the small-scale deep-fried food mode, respectively, the horizontal axis represents the time after the transition to the preheating stage, and the vertical axis represents the temperature of the object N to be heated. It is. The target temperature is Tg in advance. The temperature at the time of transition to the preheating stage (time t0) is T0.

  17A, a temperature lower than the target value Tg by a predetermined value α, a temperature lower by a predetermined value β, and a temperature lower by 0 ° C. (Tg) (when the temperature rises and reaches Tg, and after overshooting) In some cases, the temperature decreases to reach Tg), and the times when the temperature of the object N reaches the respective temperatures are t1, t2, t3, and t4. Time t0 to t1 corresponds to preheating 1 stage, time t1 to t2 corresponds to preheating 2 stages, time t2 to t3 corresponds to preheating 3 stages, and time t3 to t4 corresponds to preheating 4 stages. Here, for example, the target value Tg is set to 180 ° C., and the predetermined values α and β are set to 60 ° C. and 30 ° C., respectively.

  About FIG.17 (b), since the amount of oil with which the to-be-heated material N is fried cooking is small compared with the case of normal fried food mode, the heat capacity of the to-be-heated material N also becomes small. Therefore, when the temperature of the object to be heated at the time t0 at which the transition to the preheating stage is the same T0 as in FIG. 17A, the times t3 and t4 reaching the target temperature Tg are the times t5 and t5 in the normal deep-fried food mode. Each becomes earlier than t6. Times when the temperature of the article N reaches the target temperature Tg (when the temperature reaches Tg when the temperature rises and when the temperature decreases and reaches Tg after overshooting) are t5 and t6. From time t0 to t5 corresponds to one stage of preheating, and from time t5 to t6 corresponds to two stages of preheating.

  As described above, the preheating stage is determined based on the temperature fixed on the basis of the target temperature Tg. However, the present invention is not limited to this. For example, the preheating stage is determined using the temperature T0 and the target temperature Tg when the preheating stage is entered. You may make it obtain | require by dividing the reference temperature which divides | segments.

  Moreover, although the aspect which displays so that two colors of blue and pink may blink alternately was shown in the preheating stage, it is not limited to this, for example, the number of light emitting units that are lit in pink as the temperature rises May be displayed so as to increase over time (so as not to blink).

  In this way, in a plurality of modes with different amounts of oil used for fried food cooking, change the number of light emitting parts used for display during the preheating stage, and display when the heat capacity determined based on the oil amount of the object to be heated is large The number of light emitting units provided for display is increased, and when the heat capacity is small, the number of light emitting units provided for display is reduced. By doing so, in the preheating stage of fried food cooking, it is possible to obtain a display device that can be easily perceived sensuously due to the number of light-emitting parts, and a cooking device using the same.

  In addition, the fact that the desired mode has been selected from a plurality of modes with different amounts of oil used for deep-fried food cooking is reported in combination with the difference in buzzer sound and the display of a small amount of deep-fried food mode lamp. A cooking device that can be used is obtained.

Embodiment 2. FIG.
Embodiment 2 according to the present invention is provided with a heat retaining function for maintaining the temperature of an object to be heated (curry, miso soup, soup, etc. in a pan) in a preset temperature range in the control described in Embodiment 1. Is. Note that the basic configuration of the second embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

  The heat retaining function operation of the second embodiment will be described based on 19 flowcharts.

  A predetermined object to be heated (eg, a cooking pan containing curry, miso soup, soup, etc.) is placed on the right IH heating source 6R of the top plate 21, and the main power switch is turned on (operation button 63A is pressed) in step S1. Press).

  When the right operation dial 64R is pushed out in step S2, a buzzer sound 1 (frequency 2 kHz for 0.1 second) sounds.

  When the right operation dial 64R is turned left or right in step S3, the right heating power display lamp 101R is lit in blue in step S4.

  When the right operation dial 64R is clicked to the left or right in step S30, a buzzer sound 1 sounds, and in step S31, the color of the light emitting portion of the right thermal power display lamp 101R is changed, and heating is started with the thermal power “4”.

  When the right operation dial 64R is turned to the left in step S32, the light emitting portion L1 of the right heating power display lamp 101R is lit in red and the heating power 1 is set, the buzzer sound 1 sounds.

  If the right operation dial 64R is turned to the left by two clicks or more in step S34, the buzzer sound 2 sounds in step S35, and the light emitting portion L9 is lit and the heat retaining function is started.

  If the right operation dial 64R has not been turned to the left by two clicks or more in step S34, it is determined in step S37 whether the right operation dial 64R has been turned to the right.

  If the right operation dial 64R is turned to the right in step S37, heating is started with the heating power set in step S38. If the right operation dial 64R is not turned clockwise in step S37, the process returns to step S34.

  Next, the operation of the light emitting units L1 to L9 of the right liquid crystal display unit 98R of the present invention will be described with reference to the flowchart of FIG. 19 and FIG.

  In FIG. 20A, the main power switch in step S1 is set to “ON”, and the light emitting portions L1 to L9 when the right operation dial 64R is pushed out in step S2 are all turned off. FIG. 20B is a diagram when the right operation dial 64R is turned to the left or right in Step S3 to enter the heating standby state, and the light emitting portions L1 to L8 are lit in blue.

  In FIG. 20C, in step S30, the right operation dial 64R is further clicked on one of the left and right sides to start heating with the heating power “4”, the light emitting portions L1 to L4 are lit red, and the light emitting portions L5 to L8 are turned on. FIG. That is, the light emitting portions L1 to L4 are lit in red corresponding to the setting of the thermal power “4”. In order to turn on the light emitting unit in red, the red LED is turned on and the blue LED is turned off with respect to the red and blue LEDs constituting one light emitting unit.

  FIG. 20D is a diagram of the state when the right operation dial 64R is turned to the left in step S32 and set to heating power 1, and the light emitting unit L1 is lit red and the light emitting units L2 to L2 corresponding to the heating power “1”. L8 is lit blue.

  FIG. 20 (e) is a diagram when the right operation dial 64R is turned to the left (in the direction of reducing the thermal power) by two clicks or more in step S34, the light emitting unit L9 is lit orange, and the light emitting units L1 to L8 are lit blue. It is.

  Next, the operation of the right liquid crystal display unit 98R of the present invention will be described with reference to the flowchart of FIG. 19 and FIG.

  In FIG. 21A, the main power switch in step S1 is set to “ON”, and the backlight is turned off in the right liquid crystal display unit 98R when the right operation dial 64R is pushed out in step S2.

  FIG. 21B is a diagram when the right operation dial 64R is turned to the left or right in Step S3 to enter the heating standby state. The backlight of the right liquid crystal display unit 98R is lit white and “0”. Is displayed.

  FIG. 21 (c) shows a state in which heating is performed with the heating power 4 in step S30, the backlight of the right liquid crystal display unit 98R remains white, and the liquid crystal segment rotates clockwise as indicated by the arrows in the figure. Are displayed in order to notify that heating is in progress.

  In the case of shifting to the heat retaining function in step S36 of FIG. 21 (d), the backlight of the right liquid crystal display unit 98R is lit white and “heat retention 80 ° C.” is displayed.

In this way, by setting a plurality of levels of heating power of the heating means by outputting a pulse according to the rotation angle and the rotation direction, the number of pulses output for a predetermined rotation angle can be arbitrarily set. Thus, a cooking device can be obtained that is easy to operate during the transition from the normal heating power setting to the heat retention mode.
In addition, when shifting from the normal thermal power setting to the heat insulation mode, the operation means is rotated in a direction to further reduce the thermal power from the setting state of the minimum thermal power, and the display portion of the heat insulation mode is more than the display position at the time of setting the minimum thermal power. Furthermore, since it arrange | positions at the low temperature side, the heating cooker which is easy to visually recognize having shifted to the heat retention mode in cooperation with rotation operation is obtained.

FIG. 3 is an exploded perspective view showing a heating cooker body according to Embodiment 1. It is a perspective view which shows the top-plate part which concerns on Embodiment 1, and the whole main-body part. FIG. 3 is a plan view of a part of the front of the main body according to the first embodiment. 4 is a plan view of the entire main body according to Embodiment 1. FIG. FIG. 3 is a longitudinal sectional view at a right half side position of the main body according to the first embodiment. 4 is a longitudinal sectional view showing an induction heating coil portion according to Embodiment 1. FIG. 3 is a longitudinal sectional view at a left half side position of a main body according to Embodiment 1. FIG. FIG. 3 is a configuration diagram of a control circuit according to the first embodiment. 3 is a diagram for explaining a configuration of a display control unit according to Embodiment 1. FIG. It is a longitudinal cross-sectional view which shows the upper surface operation part which concerns on Embodiment 1, and the edge part of a top-plate part. 3 is a longitudinal sectional view showing an end portion of a top plate portion according to Embodiment 1. FIG. It is a flowchart at the time of the preheating of the fried food cooking of the heating cooker which concerns on Embodiment 1. FIG. 4 is a diagram for explaining an arrangement and a display example of light emitting units constituting the display unit according to Embodiment 1. FIG. 6 is a diagram illustrating a display example of a light emitting unit constituting the display unit according to Embodiment 1. FIG. 6 is a diagram illustrating a display example of a light emitting unit constituting the display unit according to Embodiment 1. FIG. It is a figure explaining the preheating stage which concerns on Embodiment 1. FIG. It is a figure explaining the preheating stage which concerns on Embodiment 1. FIG. 6 is a diagram illustrating a display example according to Embodiment 1. FIG. It is a flowchart at the time of heating operation of the heating cooker which concerns on Embodiment 2. FIG. FIG. 10 is a diagram illustrating a display example of a light emitting unit that constitutes a display unit according to Embodiment 2. 10 is a diagram illustrating a display example according to Embodiment 2. FIG.

Explanation of symbols

  A body part, B top plate part, C casing part, D heating means, E operation means, F control means, G display means, N object to be heated, PK sealant, 2 body case, 2B front flange plate, 2SP Top opening, 2T flange, 3A flange, 6L left IH heating source, 6LC left IH heating coil, 6LM guide mark, 6R right IH heating source, 6RC right IH heating coil, 6RM guide mark, 7 central heating source, 7M guide mark, 8 Electrical component chamber, 9 Roaster heating chamber, 10 Upper component chamber, 11 Intake chamber, 12 Exhaust chamber, 13 Door, 14 Exhaust duct, 20 Upper frame, 20A Opening, 20E Through hole, 21 Top plate, 22 Heater, 23 Heater, 24 base, 26 protrusion, 27 partition plate, 30 vent, 31L temperature detection element, 31R temperature detection element, 32 opening, 3 L Light-receiving part, 33R Light-receiving part, 34L Lead wire, 36 Adhesive material, 37 Rib, 38 Protrusion, 39 Cooling air passage, 41 Cavity part, 42 Magnetic flux leakage prevention material, 43 Duct, 44 opening, 45 Vent, 46 Vent , 50 Container-like cover, 51 Upper and lower partition plates, 52 Space, 53 Rear partition plate, 54 Blower case, 54 A Ceiling wall, 55 Duct, 55 A Inlet, 56 Blower, 57 Blower, 57 A Wing, 58 Fan, 59 Motor, 59A partition plate, 60 Front operation section, 61 Top operation section, 62 Front operation frame, 63A Operation button, 64L Left operation dial, 64R Right operation dial, 65 Central operation dial, 66 Timer dial, 66L Left indicator light, 66R Right indicator lamp, 67 Timer dial, 68 Timer dial, 70 Right heating power setting operation unit, 71 Left thermal power setting operation section, 72 Central operation section, 73 Right one touch key section, 82 Left one touch key section, 74 Low thermal power key, 75 Medium thermal power key, 76 High thermal power key, 773 kW key, 78 Low thermal power key, 79 Medium heat key, 80 High heat key, 8 13 kW key, 83 Lock key switch, 90 operation button, 91 operation button, 92 operation button, 93 operation button, 94 switch button, 97R Right timer switch, 98L Left liquid crystal display, 98R Right liquid crystal display unit, 99R Right fried food selection switch, 99RS Small fried food mode lamp, 100 Integrated display means, 101L Left thermal power display lamp, 101R Right thermal power display lamp, Display control unit 101RC, Drive light emitting unit determination unit 101RD, 105 Front opening, 106 window plate, 107 central opening, 108 Sauce pan, 109 grill, 110 packing, 111 inner frame, 112 opening, 113 gap, 114 gap, 115 outer frame, 116 exhaust port, 118 upper end opening, 119 rear exhaust port, 120 deodorizing catalyst, 120H catalyst heater, 123 Front frame body, 130 cover, 140 vent, 141 front partition plate, 143 gap, 144 vertical wall, 145 gap, 150L left side mounted circuit board, 150R right side mounted circuit board, 151L heat sink fin, 151R heat sink fin, 154 air path, 155 Air passage, 160 Auxiliary cooling fan, 161 motor, 162 partition wall, 163 internal space, 164 ventilation hole, 165 ventilation hole, 170 bottom, 171 exhaust / vent hole, 200 conduction control circuit, 201 input unit, 202 output unit, 203 Storage unit, 204 Operation control unit, 206R Right heating Circuit, 210L Inverter circuit of left IH heating source 6L, 210R Inverter circuit of right IH heating source 6R, 211 Heater driving circuit of central heating source 7, 212 Heater driving circuit, 213 Heater driving circuit, 214 Heater driving circuit, 215 Liquid crystal screen Drive circuit, 221 rectifier circuit, 222 coil, 223 smoothing capacitor, 224 resonance capacitor, 225 IGBT, 226 flywheel diode, 227 current detection sensor, 228 drive circuit, 230 motor drive circuit, 231 motor drive circuit, 232 Right display lamp drive circuit, 233 Left display lamp drive circuit, 240 Temperature detection circuit, 241 Temperature detection element, 242 Temperature detection element for internal temperature detection, 243 Temperature detection element, 244 Temperature detection element, 245 Temperature detection element, 250 Plate case, 251 switch, 252 electronic component element, 253 a substrate, 254 pushbutton case 254A pushbutton, 255 membrane sheet, 255A pushbutton support piece.

Claims (5)

A main body with an open top;
A top plate for covering the upper surface of the main body and placing an object to be heated;
A heating means disposed below the top plate for heating the object to be heated;
Temperature detecting means for detecting the temperature of the object to be heated;
A display portion having a lamp group for displaying the temperature state of the object to be heated;
The preheating in which the number of lamps to be turned on in the lamp group is changed based on the heat capacity of the heated object and the temperature of the heated object is adjusted to the target temperature from a state lower than a preset target temperature. When in a stage, a display control unit that changes a lighting mode of the lamp to be lit with respect to the temperature of the object to be heated;
An input means for outputting a pulse in accordance with a rotation angle and a rotation direction, and setting a plurality of levels of heating power of the heating means;
Including a heat retention mode for controlling the temperature of the object to be heated to a predetermined temperature, and heating control means for controlling the heating means based on a pulse output from the input means,
The cooking device according to claim 1, wherein the heating control unit shifts to a heat retaining mode by being rotated in a direction to further lower the heating power from the setting state of the lowest heating power set by the input unit.   The cooking device according to claim 1, wherein a lamp used for lighting has a lighting state of two colors.   The cooking device according to any one of claims 1 and 2, wherein the heat capacity is determined based on an amount of oil in the object to be heated. The cooking device according to any one of claims 1 to 3 , wherein the display unit is arranged on a top plate. The heating control means includes
A number of pulses generated when the thermal operation one step reduction, any of claims 1 to 4, characterized in that different to the number of pulses that occur when moving the heating power from the setting state of the minimum output to insulation mode the cooking device according to any.

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