JP4120541B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker that directly heats a pan with Joule heat generated by eddy current generated by electromagnetic induction.

  Conventional induction heating cookers using induction heating, unlike the electric heater and gas, are directly heated at the bottom of the metal pan, so there is essentially no red hot part or high temperature part, and high efficiency and safety. It has many features such as cleanliness, and is widely used as a built-in induction heating cooker embedded in a table or cabinet. In this induction heating cooker, as a switch unit that accepts a user's request in actual use, such as power on / off and output setting, a switch having a membrane type switch is known (for example, a patent) Reference 1).

This is because the operation board is fixed to the periphery of the outer shell constituting the case body via a fixing base, a switch is attached on the operation board, and the switch is operated via a membrane sheet attached to the upper case of the case body. It is what I did.
JP-A-11-339945

  However, in the above-described conventional configuration, the membrane type switch has a complicated configuration with many cases including the outer case of the case main body, the fixing base, the operation board, the switch, the upper case of the case main body, and the membrane sheet, and related components. The thickness of the part is increased, the overall height is increased, and there are problems in appearance and space.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an induction heating cooker that is simple and compact in the configuration of a membrane-type thin film switch and is easy to use.

In order to solve the above-described conventional problems, in the induction heating cooker of the present invention , an electrode is formed in a place where a pair of electric insulating plates face each other with an insulating spacer in between and lack a spacer for input setting. the membrane-type thin film switch that is attached to the stationary plate, and disposed between the upper frame and the lower frame constituting the main body, wiring cable between the Rutotomoni attached to the body, the membrane switch and the control unit, the In order to prevent expansion and compression of the space due to a rapid thermal change of the thin film switch provided in the wiring cable having a substantially U-shaped slack portion in the middle and connecting the space between the electrodes of the thin film switch and the outside air The air hole is opened on the control unit side from the slack portion .

  As a result, the membrane type thin film switch is simply disposed between the upper frame and the lower frame constituting the main body by being attached to the fixed plate, and the configuration is simple, compact, and easy to use.

In the induction heating cooker of the present invention, the configuration of the membrane-type thin film switch can be made simple and compact, and can be easily used. In addition, the expansion and compression of the electrode space due to rapid thermal changes of the thin film switch is prevented, and the short circuit between the electrodes when compressed is prevented, and the liquid enters the thin film switch from the air hole and shorts between the electrodes. Absent.

First invention comprises a pot mounting plate having a thermostability and electrically insulating on the inside of the upper frame, and supplies a heating coil disposed thereunder, an alternating current of high frequency into the heating coil inverter power supply and the control unit for controlling the inverter power supply, membrane electrode where the pair of electric insulating plates lacking opposite the spacer across the spacer having insulating properties while for inputting setting is formed type and thin film switches, and a body with a lower frame to be placed in the cabinet when fitted to a cabinet arranged these members, before Symbol thin film switches, the the front SL upper portion frame together is attached to the main body is attached to a fixed plate and a resin component between the lower frame, the wiring cable between the membrane switch and the control unit, the Expansion and compression of the space due to a rapid thermal change of the thin film switch provided in the wiring cable having a slack portion in a substantially U shape therein and allowing the space between the electrodes of the thin film switch and outside air to communicate with each other The membrane-type thin film switch is attached to a fixed plate and constitutes a main body by using an induction heating cooker in which an air hole for preventing air is opened on the control unit side from the slack portion. It is only arranged between the frames, and the configuration is simple, compact, and easy to use.

Moreover , the wiring cable for the thin film switch and the control unit has a substantially U-shaped slack portion in the middle thereof, so that even if liquid enters the main body, the wiring cable has a substantially U-shaped slack portion. The liquid is not dripped into the heating coil and the inverter power supply device, and it is safe.

Further, a sealing member mounted lever between the membrane switch and the upper frame, the liquid on the upper frame can be prevented from entering into the body.

In addition , by providing an air hole for preventing expansion and compression of the space due to a rapid thermal change of the thin film switch, provided in the wiring cable through which the space between the electrodes constituting the thin film switch communicates with the outside air, It is possible to prevent expansion and compression of the electrode space due to a rapid thermal change of the thin film switch, and to prevent a short circuit between the electrodes when compressed.

In addition , the air hole is provided in the wiring cable and is opened from the slack of the wiring cable on the control unit side, so that liquid does not enter the thin film switch from the air hole and short-circuit between the electrodes. .

According to a second aspect of the present invention, in particular, in the first aspect of the invention, by providing a dent portion for storing liquid at the bottom portion of the main body facing the substantially U-shaped sag portion of the wiring cable, The liquid dripped at the slack-shaped slack portion can be temporarily stored, and the liquid can be prevented from entering the control portion of the device, the inverter power supply device, or other portions.

According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the thin film switch is adhered to the back surface of the upper frame, so that the thin film switch is in close contact with the back surface of the upper frame, and the liquid on the upper frame is the thin film switch. Intrusion can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

( Reference form 1)
1 and 2 show an induction heating cooker according to Reference Embodiment 1 of the present invention.

  FIG. 1 shows a built-in induction heating cooker in which a unit portion is fitted in a kitchen cabinet 7. As shown in the drawing, in the cabinet 7, a metal upper frame 8 constituting the main body 1 of the cooker for supporting the unit portion on the same plane is exposed to the periphery. The pan mounting plate 2 having heat resistance and electrical insulation having three heating parts is provided inside the upper frame 8, and a membrane-type thin film switch 10 for input setting is fixed inside the upper frame 8. . The upper frame 8 in the vicinity of the thin film switch 10 has a display indicating the membrane type thin film switch 10 to be input and a display unit for displaying the operation state.

  FIG. 2 shows details of a state in which the main body 1 is installed in the cabinet 7. A heating coil 3 is disposed under the pan mounting plate 2 and receives an alternating current from the inverter power supply device 4 to generate an eddy current in the pan 5 containing the cooked food to be heated to generate heat. It can be cooked. The control unit 6 that controls the input of the inverter power supply device 4 performs control based on input setting information, information on the component temperature and the ambient temperature by the sensor 17 and the like. The upper frame 8 is made of a thin metal plate such as a stainless steel plate or an enamel steel plate, and has a sufficient strength against scratches and the like. The operation portion and the outer peripheral portion of the upper frame 8 are integrally formed. However, as shown in FIG. 1, the upper frame 8 can be divided into the operation portion and the outer peripheral portion.

Between the lower frame 9 constituting the main body 1 together with the upper frame 8 and the upper frame 8, a membrane type thin film switch 10 is attached and arranged in a fixed plate 15 configured in a concave shape with resin parts or the like, and the upper, lower It is sandwiched between the frames 8 and attached to the main body 1. In this attached state, the operation portion 10e of the membrane switch 10 includes a fixed plate 15, Ru through the lower frame 9 positioned above the cabinet 7 Tei. Further, the upper frame 8 is provided with a recess 8a, in which the operation portion 10e of the thin film switch 10 is disposed, and the operation portion 10e of the thin film switch 10 is positioned below the upper surface of the upper frame 8 by the level difference of the recess 8a. I am letting.

  In the thin film switch 10, a pair of electrical insulating plates 10 a and 10 b are opposed to each other in a sandwich structure with an insulating spacer 10 c interposed therebetween. Electrodes 11a and 11b are formed. The input setting thin film switch 10 is disposed adjacent to the pan mounting plate 5. These electrodes 11a and 11b may be arranged and formed according to the necessity of ON, OFF, output setting and the like necessary for setting the induction heating cooker. Further, the insulating plates 10a and 10b and the electrodes 11a and 11b are configured by using a flexible printed board in which silver carbon printing is performed on a polyester or polyimide base material. This flexible printed circuit board is provided with air holes 13 communicating with the outside air through the fixed plate 15 in the space of the electrodes 11a and 11b. This air hole 13 is indispensable, and can prevent expansion and compression of the electrodes 11a and 11b due to a rapid heat change of the thin film switch 10, and can prevent a short circuit between the electrodes 11a and 11b when compressed.

  Further, the wiring cable 12 of the thin film switch 10 and the control unit 6 has a substantially U-shaped slack portion 12a in the middle thereof, and even if liquid enters the main body 1, the slack of the wiring cable 12 is obtained. It will drop by the part 12a, and a liquid does not permeate into the heating coil 3 and the inverter power supply device 4, and is safe. In addition, by providing the dent portion 14 for storing liquid at the bottom position of the main body 1 facing the sag portion 12a, the liquid dropped from the sag portion 12a can be temporarily stored, and the control unit 6 of the device The liquid is prevented from entering the inverter power supply device 4 or other parts. In addition, a sealing material 16 made of an adhesive such as putty is attached to the joint between the thin film switch 10 and the upper frame 8 to prevent liquid from entering the end face of the thin film switch 10 and for the user. However, even if water or boiled juice is left in the recess 8a of the upper frame 8, it does not enter the interior and does not penetrate into the interior of the device with the electrical parts. The sealing material 16 may be an elastic rubber packing or cushion material.

(Embodiment 1 )
FIG. 3 shows an induction heating cooker according to Embodiment 1 of the present invention. The same elements as those of the reference form 1 are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, the air holes 13 through which the electrodes 11 a and 11 b constituting the thin film switch 10 communicate with the outside air are opened from the slack portion 12 a of the wiring cable 12 on the control portion 6 side. That is, the air hole 13 is extended to the tip of the wiring cable 12 on the control unit 6 side.

  As a result, the distance is longer than the kitchen cabinet 7 and the air hole 13 is positioned behind the slack portion 12a of the wiring cable 12, so that the liquid enters the thin film switch 10 through the air hole 13 and the electrode. There is no short circuit between 11a and 11b.

(Embodiment 2 )
FIG. 4 shows an induction heating cooker according to Embodiment 2 of the present invention. The same elements as those in Reference Embodiment 1 or Embodiment 1 are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, the thin film switch 10 is affixed to the back surface of the upper frame 8 with a double-sided tape 18 or an adhesive.

  Thereby, the thin film switch 10 is in close contact with the back surface of the upper frame 8, and liquid on the upper frame 8 is prevented from entering the thin film switch 10.

  Further, by providing a liquid blocking portion 19 that protrudes upward to block the flow of liquid into the thin switch 10 on the upper surface of the upper frame 8, water spilled on the pan mounting plate 2 by the action of the liquid blocking portion 19 is provided. In addition to preventing the soup from flowing into the membrane-type thin film switch 10 side, even when a heated pan, pan, etc. are placed in a shifted position, the liquid blocking unit 19 may directly contact the thin switch 10. In addition, thermal deformation of the thin film switch 10 and short circuit between the electrodes 11a and 11b can be prevented. The liquid blocking portion 19 may be provided in a ring shape or provided as a dam between the pan placing plate 2 and the thin film switch 10.

  In FIG. 4, the dent portion 14 for storing the liquid is configured as a separate part from the main body 1 and is detachable. However, by this, the dent portion 14 is removed and the process of discharging the collected liquid when the user needs it Can be hygienic and safe.

( Reference form 2 )
FIG. 5 shows an induction heating cooker in Reference Embodiment 2 of the present invention. The same elements as those of the reference form 1 are denoted by the same reference numerals and description thereof is omitted.

In the present reference is obtained by providing a recess 8a of the membrane switch 10 is provided in the upper frame 8 is located, the discharge groove 20 for discharging the liquid between the outer periphery of the main body 1.

  Thereby, even if water or boiled juice is spilled on the thin film switch 10 and does not accumulate, it flows out to the outer peripheral surface via the discharge groove 20, so that reliability is improved and there is less fear of accumulation of dirt. .

In the implementation of Embodiment 1, 2 or references of the first and second forms described above, which can be formed by combining as necessary, limited to the configuration of the embodiments or references form It is not something that can be done. Further, the thin film switch of each embodiment or reference embodiment is not limited to a specific one input setting switch, and can be appropriately applied to a plurality of other switches.

  As described above, the induction heating cooker according to the present invention has a built-in type induction heating cooker because the configuration of the membrane-type thin film switch can be simplified and made compact and easy to use. Of course, it is also useful as a stationary or tabletop induction heating cooker.

The perspective view of the induction heating cooking appliance in the reference form 1 of this invention Cross section of the main part of the induction heating cooker Sectional drawing of the principal part of the induction heating cooking appliance in Embodiment 1 of this invention Sectional drawing of the principal part of the induction heating cooking appliance in Embodiment 2 of this invention The perspective view of the induction heating cooking appliance in the reference form 2 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Pan mounting board 3 Heating coil 4 Inverter power supply device 6 Control part 7 Cabinet 8 Upper frame 8a Recessed part 9 Lower frame 10 Thin film switch 10e Operation part 11a, 11b Electrode 12 Cable for wiring 12a Slack part 13 Air hole 14 Dented part 15 Fixing plate 16 Sealing material

Claims (3)

A pot mounting plate having a heat resistance and electrical insulating property provided on the inner side of the upper frame, a heating coil disposed below the inverter power supply apparatus for supplying a high-frequency alternating current to the heating coil, the inverter A control unit that controls the power supply device, a pair of electrical insulating plates for input setting , facing each other with an insulating spacer interposed therebetween, and a membrane-type thin film switch in which an electrode is formed at a location lacking the spacer ; and a body having the lower frame the placed in a cabinet when fitted to a cabinet arranged these members, prior Symbol thin film switches, the resin between said front SL upper portion frame lower frame together is attached to the main body is attached to the fixed plate is constituted by components, wiring cables between the membrane switch and the control unit has a substantially U-shape in the middle An air hole for preventing expansion and compression of the space due to a rapid thermal change of the thin film switch, provided in the wiring cable having a slack portion and allowing communication between the space between the electrodes of the thin film switch and outside air An induction heating cooker that is opened on the control unit side from the slack portion . Induction heating cooker according to claim 1, a recess accumulating liquid is provided in the bottom position of the substantially U-shaped slack portion facing the body of the wiring cable. The induction heating cooker according to claim 1 or 2 , wherein the thin film switch is attached to the back surface of the upper frame.

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