JP7281075B2 - induction cooker - Google Patents

Description

The present disclosure relates to a built-in induction cooker.

2. Description of the Related Art Conventionally, a built-in induction cooker that is used by being incorporated into kitchen furniture (system kitchen) is known (see, for example, Patent Document 1).

JP 2014-142125 A (page 5, FIG. 5)

In a built-in induction cooker that is used by being incorporated in kitchen furniture (system kitchen), it is possible to effectively utilize the space below the countertop of the kitchen furniture (system kitchen) in which the induction cooker is incorporated. is requested. For this reason, attempts have been made to reduce the thickness of the induction cooker so that a larger space can be secured below the countertop.

However, by trying to reduce the thickness of the induction heating cooker, the volume of the main body will of course be reduced, but even if the parts themselves are made smaller, the required parts will have a larger volume of the main body. Since it is the same as a heating cooker, it has to be housed in a smaller volume, and the distances in the height direction, front, rear, left and right directions of the parts housed in the main body are reduced. .

Some of the parts that are housed include those that generate electrical and magnetic noise, and those that are vulnerable to electrical and magnetic noise. As the distance between parts in the front, back, left and right directions becomes closer, electrical parts that are vulnerable to electrical and magnetic noise become more susceptible to the effects of electrical parts that generate electrical and magnetic noise. is an issue.

The present disclosure has been made in order to solve the above-mentioned problems, and efficiently arrange means for suppressing electrical and magnetic noise, and even if the volume of the body is reduced, the electrical and magnetic To provide a built-in induction heating cooker in which trouble due to typical noise is less likely to occur.

The induction heating cooker according to the present disclosure includes a main body, a top plate provided on the upper surface of the main body, an induction heating coil provided inside the main body and below the top plate, a switching element that drives the induction heating coil, and A drive control board comprising a circuit including control means for control, a display means for displaying the operating state of the main body, and an operation display control board comprising a circuit including display control means for controlling the display means. and, when projected from the upper side, which is the top plate side, the display means and the operation display control board are arranged above the drive control board, and the switching element mounted on the drive control board, the display means, and the operation A magnetic shield made of a non-magnetic metal material is arranged between the drive control board and the operation display board so as to shield the display control means mounted on the display control board.

According to the present disclosure, the display means and the operation display control board are arranged above the drive control board when projected from the upper side, which is the top plate side, and the switching element and the display means and the display means mounted on the drive control board are arranged above the drive control board. A magnetic shield made of a non-magnetic metal material is arranged between the drive control board and the operation display board so as to shield the display control means mounted on the operation display control board, so that the switching element, the display means, and the display control It is possible to provide a built-in induction heating cooker in which the display means and the display control means are less susceptible to radiation noise from the switching element even when the means are close to each other, so that problems are unlikely to occur.

1 is an external perspective view showing an example of a built-in induction heating cooker according to Embodiment 1. FIG. 1 is an external perspective view showing an example of kitchen furniture (system kitchen) in which a built-in induction heating cooker according to Embodiment 1 is incorporated; FIG. 1 is an external perspective view showing a state in which the built-in induction heating cooker according to Embodiment 1 is incorporated in kitchen furniture (system kitchen); FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified cross-sectional view of kitchen furniture (system kitchen) cut in the longitudinal direction in a state where the built-in induction heating cooker according to Embodiment 1 is incorporated in the kitchen furniture (system kitchen); 4 is an external perspective view showing another example of the built-in induction heating cooker according to Embodiment 1. FIG. 4 is an external perspective view showing a state in which the built-in induction heating cooker as another example of the built-in induction heating cooker according to Embodiment 1 is incorporated in kitchen furniture (system kitchen); FIG. . 1 is an external plan view showing a state in which the built-in induction heating cooker according to Embodiment 1 is viewed from above; FIG. 1 is an exploded perspective view showing an example of a built-in induction heating cooker according to Embodiment 1. FIG. FIG. 2 is a top view of the top plate of the built-in induction heating cooker according to Embodiment 1 and a state in which the cover of the operation display board is removed; FIG. 9 is a top view showing a state in which the operation display board and the operation switch board are removed from the state shown in FIG. 8 ; FIG. 10 is a top view showing a state in which an upper insulating sheet and an upper magnetic shield (first magnetic shield) are removed from the state shown in FIG. 9; 12 is a top view of the state shown in FIG. 11 with the cover of the drive control board removed; FIG. 4 is a diagram of a single drive control board of the built-in induction heating cooker according to Embodiment 1. FIG. 13 is a top view of the state shown in FIG. 12 with the drive control board removed; FIG. 15 is a top view of the state shown in FIG. 14 with the insulating sheet removed; FIG. FIG. 8 is a cross-sectional view of the built-in induction heating cooker according to Embodiment 1 taken along the cutting line AA shown in FIG. 7; FIG. 8 is a cross-sectional view of the built-in induction heating cooker according to Embodiment 1 taken along the cutting line BB shown in FIG. 7;

An embodiment of a built-in induction heating cooker of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present disclosure. In addition, the present disclosure includes all combinations of configurations that can be combined among the configurations shown in the following embodiments. In addition, the built-in induction heating cooker shown in the drawings is an example of equipment to which the built-in induction heating cooker of the present disclosure is applied, and is shown in the drawings. The applicable equipment of the present disclosure is not limited to the built-in induction heating cooker. Also, in the following description, terms representing directions (for example, "up", "down", "right", "left", "front", "back", etc.) are used as appropriate for ease of understanding. They are intended to be illustrative and not limiting of the present disclosure. In the embodiments described below, when the built-in induction heating cooker is viewed from the front, "top", "bottom", "right", "left", "front", and "rear" and so on. Also, in each figure, the same reference numerals denote the same or corresponding parts, which are common throughout the specification.

Embodiment 1.
FIG. 1 is an external perspective view showing an example of a built-in induction heating cooker according to Embodiment 1. FIG. FIG. 2 is an external perspective view showing an example of kitchen furniture (system kitchen) in which the built-in induction heating cooker according to Embodiment 1 is incorporated. FIG. 3 is an external perspective view showing a state in which the built-in induction heating cooker according to Embodiment 1 is incorporated in kitchen furniture (system kitchen). FIG. 4 is a simplified cross-sectional view of the kitchen furniture (system kitchen) cut in the front-rear direction with the built-in induction heating cooker according to Embodiment 1 incorporated in the kitchen furniture (system kitchen). . 5 is an external perspective view showing another example of the built-in induction heating cooker according to Embodiment 1. FIG. FIG. 6 is an external view showing a state in which a built-in induction heating cooker as another example of the built-in induction heating cooker according to Embodiment 1 is incorporated in kitchen furniture (system kitchen). It is a perspective view. FIG. 7 is an external plan view showing the state of the built-in induction heating cooker according to Embodiment 1 as viewed from above. 8 is an exploded perspective view showing an example of the built-in induction heating cooker according to Embodiment 1. FIG. 9 is a top view of the top plate of the built-in induction heating cooker according to Embodiment 1 and a state in which the cover of the operation display board is removed. FIG. FIG. 10 is a top view of the state shown in FIG. 8 with the operation display board and the operation switch board removed. FIG. 11 is a top view of the state shown in FIG. 9 with the upper insulating sheet and the upper magnetic shield plate (first magnetic shield plate) removed. FIG. 12 is a top view of the state shown in FIG. 11 with the cover of the drive control board removed. FIG. 13 is a diagram of a single drive control board of the built-in induction heating cooker according to Embodiment 1. FIG. FIG. 14 is a top view of the state shown in FIG. 12 with the drive control board removed. FIG. 15 is a top view of the state shown in FIG. 14 with the insulating sheet removed. FIG. 16 is a cross-sectional view of the built-in induction heating cooker according to Embodiment 1 taken along the cutting line AA shown in FIG. 17 is a cross-sectional view of the built-in induction heating cooker according to Embodiment 1, taken along the cutting line BB shown in FIG.

The built-in induction heating cooker 1 according to Embodiment 1 includes a box-shaped main body 101 and a flat top plate 102 as shown in FIG. As shown in FIG. 8, the main body 101 includes a main body case 101A having an open upper surface, a power board 111, a first inverter board (drive control board) 112, a second inverter board 113, a filter board 114, and an operation display board unit. 101B, a left induction heating coil unit 101C, a right induction heating coil unit 101D, a central induction heating coil unit 101E, a cooling fan 121, and the like are accommodated, and a flat top plate 102 covers the top opening of the main body case 101A. is provided.

The body case 101A is formed by bending a flat sheet metal such as an aluminum-plated steel sheet. The top plate 102 is composed of a top plate 102A made of a non-metallic material such as heat-resistant glass or ceramic, and a frame 102B made of metal so as to surround the outer periphery of the top plate 102A.

Further, on the top plate 102A of the top plate 102, a heating port indication that serves as a mark when placing a cooking container to be heated such as a pot on the heating port is displayed using means such as printing. Since the built-in induction heating cooker according to Embodiment 1 is described as an example having three heating ports, as shown in FIGS. There are three heating port displays, a mouth display 102D and a central heating port display 102E.

As shown in FIGS. 3 and 4, the built-in induction heating cooker 1 is used by being incorporated in kitchen furniture (system kitchen) 2. As shown in FIG. As shown in FIG. 2, the built-in induction heating cooker 1 is inserted into a built-in opening 2B formed in a countertop 2A on the upper surface of kitchen furniture (system kitchen) 2 so that the main body 101 is dropped. , is supported by a top plate 102 on the countertop 2A.

The built-in opening 2B formed in the countertop 2A has a width dimension W, a depth dimension D, and four corner dimensions R. For kitchen furniture (system kitchen) 2, the standardization and standardization of materials related to the housing industry and related industries such as building materials and housing equipment, etc. ), the dimensions of the built-in opening 2B of the countertop 2A are defined in the long-term use component standards for the IH cooking heater (induction heating cooker of the present disclosure) (built-in), and according to the regulations, the width dimension is 560 to 564 mm, the depth dimension is 460 to 464 mm, and the four corner dimensions are R25 or less. The dimension W in the width direction, the dimension D in the depth direction, and the four corner dimensions R may be dimensions that fall within the ranges of the dimensions specified above.

In addition, the standard for long-term use members also stipulates the dimension in the thickness direction of the countertop 2A, and the front end of the countertop 2A shown in FIG. The dimension T in the thickness direction of 2Aa) may be a dimension that is 40 mm or less according to the regulations.

As shown in FIG. 4, the thickness of the main body 101 is within the range of the dimension T in the thickness direction of the front end portion 2Aa of the countertop 2A. That is, the thickness of the main body 101 is set to be 40 mm or less. By setting the dimension of the main body 101 in the thickness direction to be 40 mm or less, the internal space 2D formed by the back plate 2G, the bottom plate 2H and the side plates can be effectively utilized.

For example, as shown in FIG. 2, storage boxes 2E are provided at both ends of the front opening 2C. By setting the dimension in the thickness direction of the main body 101 to be 40 mm or less, as shown in FIG. It becomes possible to expand the space and improve the convenience of the user.

In addition, the internal space 2D below the built-in induction heating cooker 1 is not only effectively used as a storage space, but also the main body 101 of the built-in induction heating cooker 1 is used as an upper unit. As shown in FIG. 5, a lower main unit 103 containing a heating cooking chamber (not shown) is connected below it to form a built-in induction heating cooker 1A having a heating cooking chamber in an inner space 2D. Unit 103 can also be accommodated. By setting the dimension of the main body 101 in the thickness direction to 40 mm or less, the accommodation space of the main body lower unit 103 can be increased.

The main body lower unit 103 includes a heating cooking chamber (not shown) as described above. By opening the heating cooking chamber door 3 on the front side, the food to be cooked can be accommodated in the heating cooking chamber and cooked. When the main body lower unit 103 is connected and incorporated into the kitchen furniture (system kitchen) 2 as a built-in induction heating cooker 1A having a heating cooking chamber, the position of the storage 2F shown in FIG. 3, that is, the front opening 2C (See FIG. 2), as shown in FIG. 6, the cooking chamber door 3 is accommodated.

As shown in FIG. 8, inside the body case 101A are a power supply board 111, a first inverter board (drive control board) 112, a second inverter board 113, a filter board 114, an operation display board unit 101B, and a left induction heating coil unit. 101C, right induction heating coil unit 101D, and central induction heating coil unit 101E are accommodated, and a cooling fan 121 for cooling them is also accommodated.

The cooling air generated by the operation of the cooling fan 121 cools the first inverter board (drive control board) 112, the left induction heating coil unit 101C, and the like, and then flows through the exhaust paths 101F and 101G provided at the rear of the main body 101. and is discharged out of the main body 101 from the exhaust port 102N and the exhaust port 102P provided in the frame 102B behind the top plate 102. As shown in FIG.

As shown in FIGS. 7 and 8, an exhaust port cover 104 is provided to cover the exhaust ports 102N and 102P. The exhaust port cover 104 is formed with an opening that allows ventilation so that the discharged air can pass through with little resistance. By providing the exhaust port cover 104 , entry of foreign matter into the main body 101 through the exhaust ports 102</b>N and 102</b>P located below the exhaust port cover 104 is suppressed.

As shown in FIG. 7, on the top plate 102A of the top plate 102, there are three heating port displays indicating the position where the object to be heated is placed. 102E is displayed by a method such as printing. Heat sources corresponding to the respective heating port displays are arranged below the left heating port display 102C, the right heating port display 102D, and the central heating port display 102E and inside the main body case 101A. In the built-in induction heating cooker 1 of the present disclosure, an example in which three heating ports are provided is described, but the number of heating ports may be two, which can be selected according to specifications.

A left induction heating coil unit 101C is arranged below the left heating port display 102C, a right induction heating coil unit 101D is arranged below the right heating port display 102D, and a central induction heating coil unit 101E is arranged below the central heating port display 102E. ing. In addition, in the built-in induction heating cooker 1 of the present disclosure, all three heating ports are described as induction heating heat sources, but all three need not be induction heating heat sources. Alternatively, one of the three heat sources, for example, the central heat source may be a radiant heating type heat source, which can be selected according to the specifications.

As shown in FIG. 9, the left induction heating coil unit 101C includes a left induction heating coil 101Ca and a left magnetic shielding ring (magnetic shielding means of the present disclosure) 101Cb. In addition, two contact-type temperature detection means 117 are provided to detect the temperature of the object to be heated by contacting the lower surface of the top plate 102A through the lower surface side, and the temperature of the object to be heated is detected by infrared rays transmitted through the top plate 102A. It has one non-contact temperature sensing means 118 for sensing. The contact temperature detection means 117 and the non-contact temperature detection means 118 are connected to the operation display board 115 described later by a left induction heating coil unit temperature detection means connection line 119A, which is the second connection line of the present disclosure.

The right induction heating coil unit 101D includes a right induction heating coil 101Da and a right magnetic shield ring 101Db. In addition, like the left induction heating coil unit 101C, two contact-type temperature detection means 117 are provided to detect the temperature of the object to be heated through the lower surface of the top plate 102A. One non-contact temperature detection means 118 is provided for detecting infrared rays transmitted through the top plate 102A. The contact temperature detection means 117 and the non-contact temperature detection means 118 are connected to the operation display board 115 described later with a right induction heating coil unit temperature detection means connection line 119B, which is the second connection line of the present disclosure.

The central induction heating coil unit 101E includes a central induction heating coil 101Ea and a central magnetic shield ring 101Eb. Further, one contact type temperature detection means 117 is provided for detecting the temperature of the object to be heated by contacting the lower surface of the top plate 102A through the lower surface side thereof. The contact-type temperature detection means 117 is connected to an operation display board 115, which will be described later, via a connection line (not shown). It should be noted that the number and combination of the temperature detecting means described above are merely examples, and are not limited to this and can be set as appropriate.

The left induction heating coil 101Ca, the right induction heating coil 101Da, and the central induction heating coil 101Ea are each made of, for example, about 30 thin copper wires or aluminum wires of about 0.1 mm to 0.3 mm, each of which is bundled, and a plurality of the bundles are twisted. It is configured by winding it annularly while heating the object to be heated by induction heating. It should be noted that the winding shape of the illustrated coil is an example, and the shape is not limited to this shape.

The left induction heating coil unit 101C and the right induction heating coil unit 101D are arranged side by side in the left-right direction on the front side of the top plate 102 . Further, the central induction heating coil unit 101E is provided on the back side of the left induction heating coil unit 101C and the right induction heating coil unit 101D, and is provided at substantially the central position of the top plate 102 in the left-right direction.

The output of the left induction heating coil 101Ca of the left induction heating coil unit 101C and the right induction heating coil 101Da of the right induction heating coil unit 101D is, for example, 3.2 kW, and the output of the central induction heating coil 101Ea of the central induction heating coil unit 101E. is, for example, 1.5 kW, and the output of the central induction heating coil 101Ea is set lower than the outputs of the left induction heating coil 101Ca and the right induction heating coil 101Da. This output is an example, and all three heating coils may be different or all may be the same, and the combination of outputs can be appropriately selected according to the specifications.

On the front side of the top plate 102, more specifically, the left heating port display 102C and the right heating port display 102D of the top plate 102A, as shown in FIG. An operation unit 102J is provided. The left operation unit 102G is an operation unit for performing operation input to the left induction heating coil unit 101C, the central operation unit 102H is an operation unit for performing operation input to the central induction heating coil unit 101E, and the right operation unit 102J is for the right induction heating coil unit 101D. It is an operation part for performing operation input, and has an operation part corresponding to the heating port. Further, a main power switch 102F is provided at the right end of the operation section, and turns off/on the power of the built-in induction heating cooker 1 as a whole. In addition, in the built-in induction heating cooker 1 of the present disclosure, the operation unit is assumed to be a touch switch type operation unit that detects input by changes in capacitance. It is related to the operation part of However, the operation section is not limited to the touch switch type operation section, and may be an operation section using a mechanical switch.

Further, a left display section 102K, a central display section (main display section) 102L, and a right display section 102M are provided between the heating port and the operation section. A central display unit (main display unit) 102L is an integrated display unit related to the three heating sources, and the input result of heat cooking and the heating power setting of the left operation unit 102G, the central operation unit 102H, and the right operation unit 102J for the three heating sources are displayed. , menu settings, etc., and the progress of cooking with each heating source.

The left display section 102K displays the timer time set when timer cooking is performed using the left induction heating coil unit 101C, and displays the remaining cooking time and remaining time from the start of the set timer cooking. Similarly, the right display section 102M displays the timer time set when timer cooking is performed using the right induction heating coil unit 101D, and displays the remaining cooking time and remaining time from the start of the set timer cooking. do.

As shown in FIG. 9, when the top plate 102 is removed, an operation switch substrate 131A and an operation switch substrate 131B are arranged at positions corresponding to the left operation portion 102G, the central operation portion 102H, and the right operation portion 102J under the top plate 102A. ing. The operation switch substrate 131A and the operation switch substrate 131B have a plurality of electrodes 132 for detecting changes in capacitance.

When one of the operation keys (not shown) of the operation portion on the top plate 102A of the top plate 102 is touched, the capacitance is generated by the electrodes 132 corresponding to the operation keys of the operation switch substrate 131A or the operation switch substrate 131B under the top plate 102A. is detected, and the input of the operation key is input as a signal to an operation display control microcomputer 115D mounted on the operation display board 115, which will be described later, and the operation content is displayed on the central display device (main display device) 115B. Is displayed.

As shown in FIG. 9, the operation display board 115 is housed near the front side of the body case 101A. Originally, the operation display board 115 is combined with the operation display board cover 116 as shown in FIG. 8 and housed in the main body case 101A as the operation display board unit 101B. It should be noted that 116 is shown removed.

The operation display board 115, the operation switch board 131A and the operation switch board 131B are connected by an operation switch board connection line 155 (see FIG. 17) such as a flat cable. The operation display board 115 includes a left display device 115A, a central display device (main display device) 115B, a right A display device 115C is mounted. The left display device 115A, the central display device (main display device) 115B, and the right display device 115C are LCDs (Liquid Crystal Devices). LCD.

Setting information and the like displayed on the left display device 115A, the central display device (main display device) 115B, and the right display device 115C are displayed on the left display portion 102K and the central display portion (main display portion) 102L, which are transparent portions of the top plate 102A. , the right display portion 102M is viewed by the user through the top plate 102A.

Various boards are accommodated in the main body case 101A. A second inverter board 113 and a filter board 114 are accommodated.

The filter board 114 has a filter circuit (not shown) for removing noise of a commercial AC voltage of 200 V input from an external power supply. The power supply board 111 includes a constant voltage circuit (not shown) that generates a constant voltage of 24 V or less to be supplied to the operation display board 115 and the like. In addition, in the built-in induction heating cooker 1 of the present disclosure, an example in which the filter board 113 and the power supply board 114 are separately configured is described, but they may be configured integrally.

The second inverter board 113 is a drive control board on which a circuit for high frequency drive of the central induction heating coil 101Ea of the central induction heating coil unit 101E is mounted. The built-in induction heating cooker 1 of the present disclosure has been described with three heating ports, but the number of heating ports may be two. Since the central induction heating coil 101Ea is eliminated, the second inverter board 113 for high-frequency driving of the central induction heating coil 101Ea becomes unnecessary.

The first inverter board (drive control board) 112 (see FIGS. 12 and 13) is arranged side by side in the left-right direction for the left induction heating coil 101Ca of the left induction heating coil unit 101C and the right induction heating of the right induction heating coil unit 101D. It is a drive control board on which a circuit for high-frequency driving of the coil 101Da, which is generally called an inverter circuit, is mounted.

As shown in FIG. 10, the first inverter board (drive control board) 112 is in a state where it is covered without being exposed even when the operation display board 115 is removed. A state appears in which an insulating sheet 142 is placed on top of the substrate). That is, the upper magnetic shield plate 141 is a magnetic shield plate arranged on the first inverter board (drive control board) 112 . The upper magnetic shield plate 141 is made of a non-magnetic metal, an aluminum plate, or the like. The insulating sheet 142 is formed of an insulating, flame-retardant vinyl chloride sheet or the like. The insulation sheet 142 has a thickness dimension of 40 mm or less, which restricts the height dimension of the main body. It is for gaining the insulation distance by getting closer to the

In FIG. 10, for convenience of explanation, only the left magnetic shielding ring (magnetic shielding means) 101Cb of the left induction heating coil unit 101C is simply illustrated. FIG. 11, FIG. 12, FIG. 14, and FIG. 15 that follow are similar illustrations.

Next, when the insulating sheet 142 and the upper magnetic shield plate 141 are removed, the first inverter board (drive control board) board cover 143 appears as shown in FIG. The first inverter board (drive control board) board cover 143 is formed by molding a flame-retardant resin material. The first inverter board (drive control board) board cover 143 serves as an air duct for cooling the first inverter board (drive control board) 112 (see FIGS. 12 and 13), and has two cooling fans. The air outlet 121A of 121 is connected to the air inlets 143A and 143B of the first inverter board (drive control board) board cover 143, respectively, to form the first inverter board (drive control board) 112 (FIGS. 12 and 13). reference). Note that the number of cooling fans 121 is not limited to two.

Next, when the first inverter board (drive control board) board cover 143 is removed, the first inverter board (drive control board) appears as shown in FIG. On the first inverter board (drive control board), as described above, a circuit for high frequency drive of the left induction heating coil 101Ca of the left induction heating coil unit 101C and the right induction heating coil 101Da of the right induction heating coil unit 101D is mounted. It is

As shown in FIG. 13, the main parts constituting the circuit for high frequency drive of the left induction heating coil 101Ca of the left induction heating coil unit 101C are the low arm side switching element 112E of the half bridge circuit and the high arm side switching element 112E of the half bridge circuit. element 112F, rectifier circuit element 112G whose clear current circuit is composed of a diode bridge, heat dissipation member 112Tb for cooling switching element 112E to which switching element 112E is attached, switching element 112F and switching element 112F to which rectifier circuit element 112G is attached. A heat dissipation member 112Ta for cooling the rectifier circuit element 112G, a temperature detection element 112Ja attached to the heat dissipation member 112Ta that indirectly detects the temperature of the switching element 112F, and a current transformer that detects the current flowing through the left induction heating coil 101Ca. A current detection unit 112L, a current-voltage conversion circuit, a temperature-voltage conversion circuit, and a connection terminal 112Jc for inputting detection signals from the temperature detection element 112Ja to the first inverter board (drive control board) via a connection line 112Jb. be. The current-current-voltage conversion circuit is a circuit that converts the current detected by the current detection unit 112L into a voltage with a load resistance. The temperature-voltage conversion circuit is a circuit that converts the current, which changes according to the temperature detected by the temperature detection element 112Ja, into a voltage with a load resistance.

Similarly, the main parts constituting the circuit for high-frequency driving of the right induction heating coil 101Da of the right induction heating coil unit 101D are the low arm side switching element 112B of the half bridge circuit, the high arm side switching element 112C of the half bridge circuit, and the clear stream circuit. a rectifier circuit element 112D configured as a diode bridge, a heat dissipation member 112Sb for cooling the switching element 112B to which the switching element 112B is attached, a switching element 112C and the rectifier circuit element 112D to which the switching element 112C and the rectifier circuit element 112D are attached. A heat radiating member 112Sa for cooling, a temperature detecting element 112Ha attached to the heat radiating member 112Sa for indirectly detecting the temperature of the switching element 112C, and a current detecting section 112K which is a current transformer for detecting the current flowing through the right induction heating coil 101Da. , a current-voltage conversion circuit, a temperature-voltage conversion circuit, a connection terminal 112Hc for inputting a detection signal of the temperature detection element 112Ha to the first inverter board (drive control board) through a connection line 112Hb. The current-current-voltage conversion circuit is a circuit that converts the current detected by the current detection unit 112K into a voltage with a load resistance. The temperature-voltage conversion circuit is a circuit that converts the current, which changes according to the temperature detected by the temperature detection element 112Ha, into a voltage with a load resistance.

In FIG. 13, the load resistance of each of the current-voltage conversion circuits and the load resistance of the temperature-voltage conversion circuits are the current-voltage conversion circuit peripheral 112N, the temperature-voltage conversion circuit peripheral 112Q, the current-voltage conversion circuit peripheral 112M, and the temperature-voltage conversion circuit peripheral 112M. Each of them is indicated by a circuit periphery 112P.

Further, the first inverter board (drive control board) includes a circuit for high-frequency driving of the left induction heating coil 101Ca of the left induction heating coil unit 101C, and a circuit for high-frequency driving of the left induction heating coil 101Da of the right induction heating coil unit 101D. A microcomputer 112A, which is control means for controlling the circuit for

Next, when the first inverter board (drive control board) is removed, as shown in FIG. A state appears in which an insulating sheet 145 is placed on top of the insulating sheet 145 . That is, the lower magnetic shield plate 144 is a magnetic shield plate arranged under the first inverter board (drive control board) 112 . The lower magnetic shield plate 144 is made of a highly conductive material such as a non-magnetic metal, copper, or aluminum. Among them, aluminum is easy to process and readily available, and has high thermal conductivity, so it has excellent heat dissipation, so heat generation can be suppressed. Note that the aluminum may be in the form of a tape instead of a plate.

The insulating sheet 145 is formed of an insulating flame-retardant vinyl chloride sheet or the like. The insulating sheet 145 is for providing an insulating distance from the lower magnetic shield plate 144 since the legs of the connection terminals of the electrical components mounted on the first inverter board (drive control board) 112 protrude below the board. As shown in FIG. 14, the insulating sheet 145 is larger than the lower magnetic shield plate 144 and is attached so as to completely cover the lower magnetic shield plate 144 .

Below the lower magnetic shield plate 144 and the insulating sheet 145, a first inverter board (drive control board) case 146 is attached to the main body case 101A. It is The first inverter board (drive control board) case 146 is molded from a flame-retardant resin material.

As shown in FIG. 14, a first inverter board (drive control board) case 146 is formed with a plurality of convex shapes 146A. A hole 144e is provided in the lower magnetic shield plate 144 at a position corresponding to the convex shape 146A. Also, the insulating sheet 145 is provided with a through hole 145A at a position corresponding to the convex shape 146A.

The punched hole 144e of the lower magnetic shield plate 144 and the punched hole 145A of the insulating sheet 145 are aligned with the convex shape 146A of the first inverter board (drive control board) case 146, and the convex shape 146A penetrates the punched hole 144e and the punched hole 145A. Thus, the lower magnetic shield plate 144 and the insulating sheet 145 are attached to the first inverter board (drive control board) case 146 .

When the insulating sheet 145 is removed as shown in FIG. 15, the lower magnetic shield plate 144 is exposed. The lower magnetic shield plate 144 is provided with holes 144a and 144b and notches 144c and 144d. The through hole 144b is inserted into the first inverter board (drive control board) 112 of the current detection unit 112L constituted by the current transformer shown in FIG. The attached leg portion 112La (see FIG. 16) may protrude from the first inverter board (drive control board) 112 by 3 mm to a maximum of 3.5 mm. The distance in the height direction to the lower magnetic shield plate 144 is set so that there is a gap even if the lower magnetic shield plate 144 protrudes by 3.5 mm. It is

Similarly, the through hole 144a is inserted into the first inverter board (drive control board) 112 of the current detector 112K composed of a current transformer, and is soldered to the wiring pattern of the first inverter board (drive control board) 112. A leg (not shown) may protrude from the first inverter board (drive control board) 112 by 3 mm to a maximum of 3.5 mm. The distance in the vertical direction is set to a dimension t, for example, 4 mm or more, which leaves a gap even if the legs protrude by 3.5 mm. .

The notch 144d is inserted into the first inverter board (drive control board) 112 of the connection terminal 112Jc that connects the connection line 112Jb of the temperature detection element 112Ja shown in FIG. 16 to the first inverter board (drive control board) 112. , The leg portion 112Jd (see FIG. 16) soldered to the wiring pattern of the first inverter board (drive control board) 112 can protrude from the first inverter board (drive control board) 112 by 3 mm to a maximum of 3.5 mm. Therefore, the distance in the height direction from the bottom of the first inverter board (drive control board) 112 to the lower magnetic shield plate 144 is set to a dimension t, for example, 4 mm or more, which leaves a gap even if the protrusion is 3.5 mm. The lower magnetic shield plate 144 is provided to avoid the position where the leg 112Jd protrudes just in case.

Similarly, the notch 144c is inserted into the first inverter board (drive control board) 112 of the connection terminal 112Hc that connects the connection line 112Hb of the temperature detection element 112Ha to the first inverter board (drive control board) 112, and is connected to the first inverter board (drive control board). (drive control board) 112 wiring patterns and soldered legs (not shown) may protrude from the first inverter board (drive control board) 112 by 3 mm to a maximum of 3.5 mm; The distance in the height direction from the bottom of the drive control board 112 to the lower magnetic shield plate 144 is set to a dimension t that leaves a gap even if it protrudes by 3.5 mm, for example, 4 mm or more. A lower magnetic shield plate 144 is provided to avoid the position.

Further, the configuration of the built-in induction heating cooker 1 of the present disclosure will be described with reference to FIGS. 16 and 17. FIG.

FIG. 16 is a cross-sectional view taken along line AA shown in FIG. 7 and viewed from the front side. The upper magnetic shield plate 141 is provided with a vertical magnetic shield plate A147 extending downward. The vertical magnetic shield A147 extends in the height direction beyond the lower surface of the first inverter board (drive control board) 112 and beyond the lower magnetic shield 144 . The left induction heating coil unit 101C is in contact with the lower surface of the top plate 102A at the receiving member 101Ce.

Radiation noise emitted from the left induction heating coil 101Ca of the left induction heating coil unit 101C propagates linearly to the microcomputer (control means) 112A of the first inverter board (drive control board) 112 arranged below. In some cases, propagation due to wraparound may also occur, and in order to secure a distance from the source of radiation noise, the lower magnetic shield is placed over the lower surface of the first inverter board (drive control board) 112 in the height direction. Ideally, it extends past plate 144 .

In addition, in the built-in induction heating cooker 1 of the present disclosure, the configuration in which the vertical magnetic shield A147 is formed integrally with the upper magnetic shield 141 has been described as an example, but the vertical magnetic shield A147 is the second magnetic shield. 1 Inverter board (drive control board) 112 only needs to be arranged in the vertical direction. Therefore, even if the vertical magnetic shield plate A147 and the upper magnetic shield plate 141 are configured separately, the vertical magnetic shield plate A147 is connected to the lower magnetic shield plate 144. may be integrated with and can be selected as appropriate. The upper magnetic shield plate 141, vertical magnetic shield plate A147, and lower magnetic shield plate 144 are electrically independent, but if they are electrically connected to the main body case 101A, the magnetic shield effect can be improved.

FIG. 17 is a cross-sectional view of the built-in induction heating cooker according to Embodiment 1 taken along the cutting line BB shown in FIG. The members 112Sb and 112Tb are mounted so that the fin portions 112Sba and 112Tba through which cooling air passes are opposed to each other. A rib 143C for insulation is provided on the first inverter board (drive control board) board cover 143 between the fin parts 112Sba and 112Tba.

A low arm side switching element 112B of a half bridge circuit for high-frequency driving of the left induction heating coil 101Da of the right induction heating coil unit 101D is fixed to the inclined surface of the heat dissipation member 112Sb with a screw 151, and the leg 112Ba is a first inverter. They are connected by soldering through the board (drive control board) 112 .

Similarly, a low-arm switching element 112E of a half-bridge circuit for high-frequency driving of the left induction heating coil 101Ca of the left induction heating coil unit 101C is fixed to the inclined surface of the heat dissipation member 112Tb with a screw 151, and the leg 112Ea is the first. 1 inverter board (drive control board) 112 is penetrated and connected by soldering.

The reason why the switching elements 112B and 112E are attached to the inclined surfaces is that the height of the switching elements 112B and 112E can be lowered compared to when the switching elements 112B and 112E are placed upright. It contributes to the following.

As described above, the first inverter board (drive control board) 112 is covered with the first inverter board (drive control board) board cover 143 , and the upper surface of the first inverter board (drive control board) board cover 143 is covered with an upper surface. A magnetic shield 141 is attached, the upper surface of the upper magnetic shield 141 and the lower surface of the operation display control board 115 are close to each other, and an insulating sheet 142 is provided between the upper magnetic shield 141 and the operation display control board 115. there is

The upper magnetic shield plate 141 is longer than the end of the first inverter board (drive control board) 112 toward the front, and the vertical magnetic shield B148 extending downward is integral with the front end. is provided in A forwardly bent portion 148a is provided at the lower end of the vertical magnetic shield B148. The insulating sheet 142 also extends downward along the vertical magnetic shield B148 with a length shorter than that of the vertical magnetic shield B148.

In front of the first inverter board (drive control board) 112, there is an induction heating coil connection line 152 that connects the first inverter board (drive control board) 112 and the right induction heating coil 101Da of the right induction heating coil unit 101D. It is arranged so as to pass through a connection line passage 156 provided in the front to the left and right (see FIG. 12, etc.). Since the induction heating coil connection line 152 is a connection line through which a high-frequency current for driving the right induction heating coil 101Da passes from the first inverter board (drive control board) 112, the induction heating coil connection line 152 also becomes radiation noise. is surrounded by a metal connection line cover 157 that suppresses the

Further forward of the induction heating coil connection line 152, a control signal is transmitted between the microcomputer (control means) 112A of the first inverter board (drive control board) 112 and the operation display control microcomputer 115D of the operation display control board 115. A signal connection line 153, which is the third connection line of the present disclosure, is arranged for exchanging .

As shown in FIG. 12, the signal connection line 153 partially extends left and right in front of the main body case 101A, one end is connected to the first inverter board (drive control board) 112 by a connection terminal 153B, and the other end is shown in FIG. As shown, it is connected to the operation display control board 115 by a connecting terminal 153A.

The central display device (main display device) 115B is mounted on the upper surface of the operation display control board 115, and the operation display board cover 116 is partially opened so that the display of the central display device (main display device) 115B can be seen. . A control signal for display from the operation display control microcomputer 115D is exchanged through the central display device connection line 154, which is the first connection line of the present disclosure.

The central display device connection line 154 is connected to the upper surface of the operation display control board 115 and the lower surface of the operation display control board 115. The operation display control board 115 has a through hole 115E through which the central display device connection line 154 passes. is provided.

The operation switch board 131A is held by the operation display board cover 116 so as to come into contact with the lower surface of the top plate 102A. The operation switch board 131A and the operation display control microcomputer 115D of the operation display control board 115 are connected by the operation switch board connection line 155, which is the third connection line of the present disclosure.

As shown in FIG. 17, the operation switch board connection line 155 is connected to the lower surface of the operation switch board 131A in front of the vertical magnetic shield B148, extends downward from the lower surface, and is slightly folded back at the bent portion 155A for operation. It is connected to the lower surface of the display control board 115 . When projected from the front side, the bent portion 155A falls within the range where the vertical magnetic shield B148 is provided. In other words, the lower end of the operation switch board connection line 155 is within the range where the vertical magnetic shield B148 is provided when projected from the front side. Here, "projecting and viewing" refers to the state in which an arrangement is virtually visible when viewed from a certain direction, although it is not actually visible (the same meaning is used in other places). ). Although not shown, the operation switch board 131B is also connected in the same manner.

As described above, since the dimension in the thickness direction of the main body 101 is set to be within 40 mm, the left induction heating coil unit 101C and the right induction heating coil unit 101D (not shown in FIG. 16) and the first inverter board (drive The distance in the thickness direction of the control board 112 is short.

In an induction heating type heating source such as the left induction heating coil unit 101C, when a high-frequency current generated by the first inverter board (drive control board) 112 is passed through the left induction heating coil 101Ca, generates magnetic lines of force. The same applies to the right induction heating coil unit 101D and the central induction heating coil unit 101E.

When an object to be heated, more specifically, a metal and conductive cooking container is placed on the left heating port display 102C through the top plate 102A, the surface of the conductive cooking container forms a "vortex" in a direction that hinders the change of the magnetic flux. An electric current flows, and since there is electrical resistance in the metal and conductive cooking vessel, Joule heat is generated and the metal is heated, that is, induction-heated. The left induction heating coil 101Ca generates magnetic lines of force. In this state, the left induction heating coil 101Ca also generates radiation noise or leakage magnetic field that hinders the stable operation of the electric elements on the substrate and the display means. The same applies to the right induction heating coil unit 101D and the central induction heating coil unit 101E.

Therefore, a left magnetic shielding ring (magnetic shielding means) 101Cb is provided on the entire outer circumference of the left induction heating coil unit 101C. The left magnetic shielding ring (magnetic shielding means) 101Cb is for reducing radiation noise or leakage magnetic field in the circumferential direction of the left induction heating coil 101Ca. The right induction heating coil unit 101D and the central induction heating coil unit 101E also have the same configuration.

As described above, the radiation noise or leakage magnetic field in the circumferential direction is suppressed by the left magnetic shield ring (magnetic shielding means) 101Cb, but the radiation noise or leakage magnetic field downward from the left induction heating coil 101Ca is suppressed. Therefore, as shown in FIG. 16, a plurality of ferrites 101Cd are arranged on the circumference.

However, as described above, the dimension in the thickness direction of the main body 101 is kept within 40 mm, and the distance in the thickness direction between the left induction heating coil unit 101C and the first inverter board (drive control board) 112 is short. Therefore, the ferrite 101Cd, which has been effective in the past, cannot be suppressed, and the switching elements 112B, 112C, 112E, and 112F mounted on the first inverter board (drive control board) 112 cause erroneous firing and current transformers. There is a high possibility that the current detection units 112L and 112K, which are current detection units 112L and 112K, may malfunction.

In addition, the switching elements 112B, 112C, 112E, and 112F are erroneously ignited due to radiation noise or leakage magnetic field affecting the switching elements 112B, 112C, 112E, and 112F, resulting in an unintended operating mode. , 112F and may eventually lead to thermal breakdown.

Furthermore, the output control of the switching elements 112B, 112C, 112E, and 112F and the microcomputer (control means) 112A, which receives signals regarding the detected current from the current detectors 112L and 112K, which are current transformers, are similarly affected by radiation noise or leakage magnetic field. more likely to be affected.

If the microcomputer (control means) 112A is affected by radiation noise or leakage magnetic field, the heat control to the object to be heated such as pots and frying pans becomes unstable due to malfunction, etc. Since there is a possibility that detection cannot be performed and the control for detection cannot operate normally, there is a possibility that desired operation and output cannot be obtained.

Therefore, in the built-in induction heating cooker 1 of the present disclosure, the dimension in the thickness direction of the main body 101 is set to 40 mm or less. ), when projected from the top plate 102 side (upper side), the microcomputer (control means) 112A is located inside the left magnetic shielding ring (magnetic shielding means) 101Cb provided on the outer periphery of the left induction heating coil unit 101C. When it is arranged so as to fit in the circumference, it is larger than the area of the microcomputer (control means) 112A on the upper side of the first inverter board (drive control board) 112, and the microcomputer (control means) 112A is all contained within that range. Since the upper magnetic shield plate 141 is arranged to have a size that allows it to be used, it is possible to suppress the influence of radiation noise or leakage magnetic field from the upper side of the first inverter board (drive control board) 112 to the microcomputer (control means) 112A. , the desired operation and output can be stably obtained.

Also, as shown in FIG. 15 (virtual display of the microcomputer (control means) 112A), when viewed from the top plate 102 side (upper side), the microcomputer (control means) 112A is the left induction heating coil unit 101C. When it is arranged so as to be accommodated in the inner circumference of the left magnetic shield ring (magnetic shielding means) 101Cb provided on the outer circumference, the area of the microcomputer (control means) 112A is located below the first inverter board (drive control board) 112. Since the lower magnetic shield plate 144 is larger than the first inverter board (drive control board) 112 and has a size that allows the entire microcomputer (control means) 112A to be contained within its range, the radiation noise or leakage magnetic field is prevented from It is possible to suppress the influence on the microcomputer (control means) 112A due to the wraparound from the outside, and it is possible to stably obtain the desired operation and output.

Furthermore, as shown in FIG. 10 (virtual display of the microcomputer (control means) 112A), when projected from the top plate 102 side (upper side), the microcomputer (control means) 112A controls the left induction heating coil unit 101C. 16, when projected from the left side as shown in FIG. 16, the first inverter board (drive control board ) 112, a vertical magnetic shield A 147 having a size larger than the area of the microcomputer (control means) 112A and capable of accommodating the entire microcomputer (control means) 112A within its range is arranged. It is possible to suppress the influence on the microcomputer (control means) 112A due to the wraparound of the magnetic field from the side of the first inverter board (drive control board) 112, and to stably obtain the desired operation and output.

Further, as shown in FIG. 13 (virtual representation of the left magnetic shield ring (magnetic shielding means) 101Cb), when projected from the top plate 102 side (upper side), the current detectors 112L and 112K, which are current transformers, the current The voltage conversion circuit peripherals 112M, 112N and the temperature-voltage conversion circuit peripherals 112P, 112Q are also arranged so as to be accommodated within the inner circumference of the left magnetic shield ring (magnetic shielding means) 101Cb provided on the outer circumference of the left induction heating coil unit 101C.

The temperature-voltage conversion circuit described here is configured to convert the temperature information detected by the temperature detection elements 112Ha and 112Ja into a voltage for input to the microcomputer (control means) 112A. It is composed of the temperature detection element 112Ja and a voltage dividing resistor (not shown). A temperature-voltage conversion circuit composed of the temperature detection element 112Ha and voltage dividing resistors (not shown) is arranged around the temperature-voltage conversion circuit 112P shown in FIG. The voltage conversion circuit is arranged in the temperature-voltage conversion circuit periphery 112Q shown in FIG.

Since the upper magnetic shield plate 141 is arranged so as to cover them, the current detectors 112L, 112K and current detectors 112L and 112K from above the first inverter board (drive control board) 112 of radiation noise or leakage magnetic field are detected. The influence on the voltage conversion circuit peripherals 112M, 112N and the temperature-voltage conversion circuit peripherals 112P, 112Q can be suppressed, and desired operation and output can be stably obtained. The connection terminals 112Hc and 112Jc of the temperature detection elements 112Ha and 112Ja to the first inverter board (drive control board) 112 are also set within the above-mentioned ranges in order to suppress erroneous input to the microcomputer (control means) 112A. should be placed.

Further, under the first inverter board (drive control board) 112, the current detection units 112L, 112K, the current-voltage conversion circuit peripherals 112M, 112N, 112P, and the temperature-voltage conversion circuit peripherals 112P, 112Q can all be accommodated within the range. Since the lower magnetic shield plate 144 of a size that can be accommodated is arranged, the current detection units 112L and 112K, the current voltage conversion circuit periphery 112M, 112N, temperature-voltage conversion circuit peripherals 112P and 112Q can be suppressed, and desired operation and output can be stably obtained. The connection terminals 112Hc and 112Jc of the temperature detection elements 112Ha and 112Ja to the first inverter board (drive control board) 112 are also set within the above-mentioned ranges in order to suppress erroneous input to the microcomputer (control means) 112A. should be placed.

Then, on the side of the first inverter board (drive control board) 112, the current detection units 112L and 112K, the current/voltage conversion circuit peripherals 112M and 112N, and the temperature/voltage conversion circuit peripherals 112P and 112Q can all be accommodated within the range. Since the vertical magnetic shield plate 147 is arranged, it is possible to suppress the influence of the radiation noise or leakage magnetic field from the side of the first inverter board (drive control board) 112 on the microcomputer (control means) 112A. , the desired operation and output can be stably obtained. The connection terminals 112Hc and 112Jc of the temperature detection elements 112Ha and 112Ja to the first inverter board (drive control board) 112 are also set within the above-mentioned ranges in order to suppress erroneous input to the microcomputer (control means) 112A. should be placed.

As described above, since the dimension in the thickness direction of the main body 101 is set to be 40 mm or less, the operation switch board 131A, the central display device (main display device) 115B, the signal connection line 153 connecting them, The distance in the thickness direction and the spatial distance between the central display device connection line 154, the operation switch board connection line 155, etc. and the first inverter board (drive control board) 112, specifically the switching elements 112B and 112E, are short.

The switching elements 112B and 112E generate radiation noise at ignition timings when high-frequency currents flow. The operation switch board 131A, the central display device (main display device) 115B, the signal connection line 153, the central display device connection line 154, the operation switch board connection line 155, and the electrical and electronic components (not shown) on the operation display control board 115 are connected. Locations, wiring patterns, etc. are vulnerable to noise, and if affected by noise, erroneous input of operation switches, erroneous display or malfunction of the central display device (main display device) 115B, abnormal communication signals, and the like may occur.

If the dimension in the thickness direction of the main body can be made large without being restricted to 40 mm or less, the operation switch board 131A, the central display device (main display device) 115B, the signal connection line 153 connecting them, the central display device connection line 154, The distance in the thickness direction and the spatial distance between the operation switch board connection line 155 and the like and the first inverter board (drive control board) 112, more specifically, the switching elements 112B and 112E can be taken, and the switching elements 112B and 112E radiated noise. However, the built-in induction heating cooker 1 of the present disclosure is designed so that the dimension in the thickness direction of the main body 101 is 40 mm or less, so that the operation The switch board 131A, the central display device (main display device) 115B, and the signal connection line 153, the central display device connection line 154, and the operation switch board connection line 155 are vulnerable to noise. It is easily affected by radiation noise generated at the ignition timing when high-frequency current is applied.

Therefore, in the built-in induction heating cooker 1 of the present disclosure, the upper magnetic shield is placed between the switching elements 112B and 112E mounted on the first inverter board (drive control board) 112 and the operation display control board 115. The plate 141 is attached to reduce the influence of the upward radiation noise of the switching elements 112B and 112E, which receives the connection points of the electrical and electronic components of the operation display control board 115, the wiring pattern, and the like. It is possible to suppress problems such as erroneous display.

Moreover, the radiation noise of the switching elements 112B and 112E is radiated not only upward but also in all directions. When projected from the front, the switching elements 112B and 112E are arranged so as to be within the range of the vertical magnetic shield B148, so the forward radiation noise of the switching elements 112B and 112E can be reduced.

Therefore, the influence of the radiation noise of the switching elements 112B and 112E received by the central display device connection line 154 that connects the control signal between the central display device (main display device) 115B and the operation display control microcomputer 115D on the bottom surface of the operation display control board 115 is reduced. It is possible to suppress the occurrence of defects such as erroneous input and erroneous display.

Furthermore, a longitudinal magnetic shield B148 extending downward is provided at the front end of the upper magnetic shield 141. When projected from the front, the switching elements 112B and 112E of the vertical magnetic shield B148 Since the operation switch board 131A, the operation switch board connection line 155, and the switching elements 112B and 112E are arranged so as to be within the range, the radiation noise in the forward direction of the switching elements 112B and 112E can be reduced. It is possible to reduce the influence of radiation noise of the switching elements 112B and 112E received by the switch board 131A and the operation switch board connection line 155, thereby suppressing the occurrence of malfunctions such as erroneous input and erroneous display.

A vertical magnetic shield B148 extending downward is provided at the front end of the upper magnetic shield 141, and when projected from the front, the switching elements 112B and 112E are aligned with the vertical magnetic shield B148. Since the signal connection line 153 and the switching elements 112B and 112E are arranged so as to block the signal connection line 153 and the switching elements 112B and 112E, the radiation noise in the forward direction of the switching elements 112B and 112E can be reduced. 112B, 112E can reduce the influence of radiation noise, and communication between the microcomputer (control means) 112A of the first inverter board (drive control board) 112 and the operation display control microcomputer 115D of the operation display control board 115 It is possible to suppress the occurrence of troubles such as anomalies, malfunctions, and erroneous inputs.

Furthermore, the longitudinal magnetic shield B 148 is provided with a forwardly extending bent portion 148a, and by extending the magnetic shield in the forward direction, it is possible to reduce the upward direction of the reflected radiation noise. The occurrence of defects such as erroneous input, erroneous display, communication abnormality, malfunction, and erroneous input can be further suppressed.

Then, as shown in FIG. 9, the left induction heating coil unit temperature detecting means connecting wire 119A and the right induction heating coil unit temperature detecting means connecting wire 119B are projected from the direction of the top plate, and the range of the upper magnetic shield plate 141 is Inside, the left induction heating coil unit temperature detection means connection wire 119A and the right induction heating coil unit temperature detection means connection wire 119B are connected to the operation display control board 115, so that the connection portion to which the temperature detection signal is input is The upper magnetic shield plate 141 reduces the influence of radiation noise from the switching elements 112B, 112C, 112E, and 112F, thereby suppressing troubles such as abnormal communication and erroneous input of the temperature detection signal.

T Thickness of countertop U Depth dimension of built-in opening W Width dimension of built-in opening 1 Built-in induction heating cooker 1A Built-in induction heating cooker (with cooking chamber) ), 2 kitchen furniture (system kitchen), 2A countertop, 2Aa front end, 2B built-in opening, 2C front opening, 2D internal space, 2E storage, 2F storage, 2G rear plate, 2H bottom plate, 3 cooking Warehouse door 101 Main body 101A Main body case 101B Operation display board unit 101C Left induction heating coil unit 101Ca Left induction heating coil 101Cb Left magnetic shielding ring (magnetic shielding means) 101Cc Coil base 101Cd Ferrite 101Ce Receiving member 101D Right induction heating coil unit 101Da Right induction heating coil 101Db Right magnetic shielding ring 101E Central induction heating coil unit 101Ea Central induction heating coil 101Eb Central magnetic shielding ring 101F Exhaust passage 101G Exhaust passage 101H Holding part 102 Top plate , 102A top plate, 102B frame, 102C left heating port display, 102D right heating port display, 102E center heating port display, 102F main power switch, 102G left operation unit, 102H central operation unit, 102J right operation unit, 102K left display section, 102L central display section (main display section), 102M right display section, 102N exhaust port, 102P exhaust port, 103 main body lower unit, 104 exhaust port cover, 111 power supply board, 112 first inverter board (drive control board), 112A microcomputer (control means), 112B switching element, 112Ba leg, 112C switching element, 112D rectifier circuit element, 112E switching element, 112Ea leg, 112F switching element, 112G rectifier circuit element, 112Ha temperature detection element, 112Hb connection line, 112Hc connection terminal, 112Ja temperature detection element, 112Jb connection line, 112Jc connection terminal, 112Jd leg, 112K current detection unit, 112L current detection unit, 112La leg, 112M current-voltage conversion circuit periphery, 112N current-voltage conversion circuit periphery, 112P Periphery of temperature-voltage conversion circuit 112Q Periphery of temperature-voltage conversion circuit 112Sa Heat dissipation member 112Sb Heat dissipation member 112Sba Fin part 112Ta Heat dissipation member 112Tb Heat dissipation member 112Tba Fin part 113 Second inverter board 114 Filter board 115 Operation display Control board 115A Left display device 115B Central display device (main display device) 115C Right display device 115D Operation display control microcomputer 115E Through hole 116 Operation display substrate cover 117 Contact temperature detection means 118 Non-contact type temperature detection means, 119A left induction heating coil unit temperature detection means connection wire (second connection wire), 119B right induction heating coil unit temperature detection means connection wire (second connection wire), 121 cooling fan, 121A outlet, 131A operation switch substrate 131B operation switch substrate 132 electrode 141 upper magnetic shield plate 142 insulating sheet 143 first inverter substrate (drive control substrate) substrate cover 143A intake port 143B intake port 143C rib 144 lower magnetic shield plate 144a punch hole 144b punch hole 144c notch 144d notch 144e punch hole 145 insulating sheet 145A punch hole 146 first inverter board (drive control board) case 146A convex shape 147 vertical magnetic shield A, 148 longitudinal magnetic shield B, 148a bent portion, 151 screw, 152 induction heating coil connection wire, 153 signal connection wire (third connection wire), 153A connection terminal, 153B connection terminal, 154 central display device connection wire (first connection line), 155 operation switch board connection line (fourth connection line), 156 connection line passage, 157 connection line cover.

Claims (7)

the main body;
a top plate provided on the upper surface of the main body;
an induction heating coil provided inside the main body and below the top plate;
a drive control board having a circuit including a switching element for driving the induction heating coil and a control means for controlling the induction heating coil;
display means for displaying an operating state of the main body;
an operation display control board having a circuit including display control means for controlling the display means;
When projected from above, which is the top plate side, the display means and the operation display control board are arranged above the drive control board,
A non-magnetic metal is placed between the drive control board and the operation display board so as to block the switching element and the display means mounted on the drive control board and the display control means mounted on the operation display control board. An induction heating cooker with a magnetic shield made of wood. a longitudinal magnetic shield extending vertically from the magnetic shield,
The display control means is mounted on the lower surface of the operation display control board, the display means is mounted on the upper surface of the operation display control board,
A through hole is provided in the operation display control board, and the display means and the display control means are connected to each other by a first connection line extending from the upper surface of the operation display control board to the lower surface through the through hole. 2. The induction heating cooker according to claim 1, wherein the induction heating cooker is connected with . 3. The induction heating cooker according to claim 2, wherein said switching element is arranged so as to be within the range of said vertical magnetic shield when viewed from the front by projecting said vertical magnetic shield. 4. The induction heating cooker according to claim 2 or 3, wherein a bent portion extending forward is provided at a lower end portion of said longitudinal magnetic shield plate. A temperature detection means for detecting the temperature of the non-heated object placed on the top plate,
The temperature detection means is connected to the operation display control board through a second connection line, and at least the second connection line of the temperature detection means is projected from the top board direction and viewed from the magnetic shielding direction. 5. The induction heating cooker according to any one of claims 1 to 4, wherein the plate is connected to the operation display control board within a range where the plate is arranged. the drive control board and the operation display control board are connected by a third connection line,
The display control means and the third connection line are arranged forward of the longitudinal magnetic shield,
5. The induction heating according to any one of claims 2 to 4, wherein the longitudinal magnetic shield plate is arranged so as to block the switching element and the third connection line when viewed from the front. Cooking device. Equipped with an operation switch board,
the operation display control board and the operation switch board are connected by a fourth connection line,
The fourth connection line is arranged on the front side of the longitudinal magnetic shield,
The fourth connection line extends downward from the lower surface of the operation display control board,
5. The induction heating cooker according to any one of claims 2 to 4, wherein the lower end of said fourth connection line is within the range of said longitudinal magnetic shield plate when viewed from the front. .

Images