JP2005149740A - Induction heating cooker - Google Patents

Abstract

A cooling fan duct for cooling a control circuit is provided with a sliding window for controlling the air volume, and the sliding window is opened and closed in accordance with a temperature difference of a temperature sensor installed inside the main body, so that it is in a high temperature state. Preventing thermal destruction due to internal high temperature by cooling a certain part intensively.
A duct 10 for circulating cooling air 7 inside a main body 9 is provided. The duct 10 has two outlets, and one of the duct outlets is provided with a slide window 8 for controlling the air volume. By adjusting the opening and closing of the sliding window 8 according to the temperature input of the temperature sensors 3 and 4 installed in the interior 9 and controlling the air volume and the wind pressure, it is possible to intensively cool particularly high-temperature portions inside the main body 9. it can.
[Selection] Figure 1

Description

  The present invention relates to an induction heating cooker for general households having a high-frequency power source such as an inverter.

  The configuration of a conventional induction heating cooker is shown in FIG.

  In FIG. 7, a main body 30 of the induction heating cooker includes a heating coil 31, a control circuit 34 that supplies a high-frequency current to the heating coil 32, and a cooling fan 33 for cooling the control circuit 34. Cooling air 35 having an air volume and a wind pressure is circulated inside the main body 30 for cooling.

  The cooling action inside the conventional induction heating cooker will be described.

When the cooling fan 33 rotates at a constant speed and the cooling air 35 is blown into the main body 30, the cooling air 35 is configured to pass through a fixed path (however, the rotation speed can be changed as necessary). The entire device is uniformly cooled so that the inside of the main body does not reach a high temperature state (see, for example, Patent Document 1).
JP 2003-77637 A

  However, in the above-described conventional configuration, since the air flow rate obtained from the cooling fan inside the housing is always constant, the circulation amount of the cooling air inside the housing is constant with respect to the component parts, so that the temperature is particularly high. For this reason, it has been difficult to concentrate the cooling air on specific components.

  The present invention solves the above-described conventional problems, and a specific air volume discharged from a cooling fan is controlled according to an internal temperature state by a sliding window provided at a duct outlet, and is particularly high in temperature. The object is to efficiently cool the inside of the housing (especially the control circuit) by intensively applying cooling air to the components.

  In order to solve the conventional problem, the cooling fan is provided with a duct for circulating cooling air into the main body, and a slide window for controlling the air volume is provided at one of the duct outlets. By adjusting the opening and closing of the sliding window according to the temperature input of a temperature sensor installed inside, the air volume and pressure are controlled to cool the inside.

  With this configuration, the shortage of cooling air supply to specific parts due to uneven circulation of cooling air circulating inside the main body is solved, and when the inside of the main body is in a high temperature state, a control circuit having a high-frequency power source such as an inverter is efficient. Therefore, it is possible to prevent the control circuit from being thermally destroyed.

  The induction heating cooker of the present invention can intensively cool a portion (particularly a control circuit) that is in a high temperature state inside the main body, and can prevent thermal destruction due to the internal high temperature state.

  A first invention includes a heating coil inside the main body, a control circuit for supplying a high-frequency current to the heating coil, and a cooling fan for cooling the control circuit, and the cooling fan includes cooling air into the main body. A duct for circulating the air is provided, the duct has two outlets, one of which is provided with a sliding window for controlling the air volume, and the sliding window is detected by a temperature sensor installed inside the main body. The sliding window can be opened and closed by adjusting the opening and closing of the sliding window or the degree of opening and closing (opening and closing adjustment) by controlling the air volume and pressure. A portion in a high temperature state can be intensively cooled.

  In the second invention, in particular, in the configuration of the first invention, the opening and closing adjustment of the sliding window is performed by the crank mechanism, so that the power transmission from the driving source to the sliding window, particularly the rotational movement from the motor is performed. Since it can be smoothly converted into linear motion, it can be opened and closed accurately.

  According to a third aspect of the invention, in particular, in the configuration of the first or second aspect of the invention, the sliding window is configured to adjust the sliding opening / closing according to the left / right temperature difference between the two temperature sensors installed in the left / right heating coils inside the main body. By doing so, the change in the air volume can be appropriately distributed in the left-right direction inside the main body, and a large amount of air volume can be sent intensively, especially to the higher temperature side.

  According to a fourth aspect of the invention, in particular, in the configuration of the first or second aspect of the invention, the sliding window is configured to adjust the sliding opening / closing depending on the temperature state of a plurality of temperature sensors installed on the heating coil and the wall surface inside the main body. By doing so, the temperature unevenness of the cooling air circulating inside the main body can be detected in detail, and the opening and closing of the sliding window can be adjusted under more appropriate conditions.

  According to a fifth aspect of the present invention, in particular, in the configuration of any one of the first to fourth aspects, by using a stepping motor as a power source for the sliding window, the sliding is performed according to information obtained by temperature input to the temperature sensor. Since the opening and closing operation of the window can be taken finely, the air volume and pressure can be finely adjusted.

  In the sixth aspect of the invention, in particular, in the configuration of the first aspect of the invention, in order to control the air volume of the cooling air at the duct outlet, an opening / closing part composed of a combination of different materials A and B is installed and combined. The motor of the power source can be omitted by adopting a configuration in which the air volume adjustment is performed by performing the opening / closing operation on the opening / closing parts due to the difference in thermal expansion coefficient.

  The seventh aspect of the invention is the configuration of the first aspect of the invention, in which the opening and closing parts using a shape memory type resin are installed and the opening and closing adjustment is performed in order to control the cooling air volume at the duct outlet. By doing so, the opening / closing part can be made a simple structure using only a single material, so that the structure becomes inexpensive and the motor of the power source can be omitted.

  In the eighth invention, in particular, in the configuration of the seventh invention, a shape memory type resin is used, and the shape memory type resin has a bimetal configuration, so that the amount of thermal deformation can be conveniently selected by combination. Fine adjustment of the opening and closing adjustment of the opening and closing parts can be performed.

  In the ninth aspect of the invention, in particular, in the configuration of any one of the first to eighth aspects, by providing a plurality of duct outlets, a plurality of strong airflows are provided at portions where cooling is required particularly when necessary. You can set and send cooling air.

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

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG. FIG. 1 is a schematic diagram of the cooling configuration of the induction heating cooker according to the first embodiment of the present invention, FIG. 2 is an enlarged view of the main part of the sliding window, and FIG. 3 is a case where a crank mechanism is used for the sliding window. (In the figure, the same components are given the same numbers).

  In FIG. 1, heating coils 1 and 2 are provided in the left-right direction inside the main body 9, and a temperature sensor 3 and a temperature sensor 4 are installed in the vicinity of the heating coils 1 and 2, respectively. A control circuit 5 for supplying high-frequency current to the heating coils 1 and 2 is provided below the heating coil 2, and cooling air 7 obtained from a cooling fan 6 provided behind the control circuit 5 passes through the duct 10. Then, a sliding window 8 for adjusting the air volume of the cooling air 7 is provided on one side of the outlet of the duct 10 having two outlets so that the cooling air 7 is distributed inside the main body 9.

  About the sliding window of the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 2, the sliding window 8 provided at one outlet of the duct 10 receives a driving force from a small motor 13 by a shaft 14, and opens and closes by providing a fixed portion 11 and a movable portion 12 in the drawing. It is the structure to perform.

  With the above configuration, the temperature difference is taken from the input temperatures detected by the temperature sensor 3 and the temperature sensor 4, and the larger the difference is, the smaller the opening of the sliding window 8 is. Can be concentrated at the other outlet, and a particularly high-temperature portion inside the main body 9 can be intensively cooled. Here, in particular, the cooling efficiency for the control circuit 5 can be increased by increasing the air volume on the heating coil 2 side, that is, on the control circuit 5 side.

  Further, as shown in FIG. 3, by using the crank mechanism 16 as the operating mechanism of the sliding window 15, the power transmission from the driving source of the sliding window 15, that is, the rotational movement from the small motor 17 is smoothly and accurately linear. Since it can be converted into motion, an accurate opening and closing operation can be performed.

  In addition, when a stepping motor is used as a power source for the sliding window (not shown), the stepping motor operation can be set in detail with respect to the input temperature of the temperature sensor, so that the sliding window can be opened and closed more finely. Therefore, the air volume and wind pressure can be finely adjusted, and the motor can perform reversible operation, so that the operating range of the motor can be minimized.

  In addition, when multiple temperature sensors are installed not only on the heating coil, but also on the internal wall surface of the main body, it is possible to detect the temperature unevenness of the cooling air circulating inside the main body finely and detect it with higher accuracy. The sliding window can be opened and closed under various conditions, and the cooling air volume can be controlled.

  In addition, by adopting a configuration in which a plurality of duct outlets for controlling the air volume of the cooling air are provided, if necessary, a plurality of stronger air volumes are set (not shown) in a portion requiring cooling, and the cooling air is supplied. Can send.

(Embodiment 2)
The second embodiment of the present invention will be described below with reference to FIGS. 4, 5, and 6. FIG. FIG. 4 is a configuration diagram of the open / close parts installed at the outlet of the cooling air duct of the induction heating cooker according to the second embodiment of the present invention, FIG. 5 shows the operating principle of the open / close parts, and FIG. It is an effect | action figure with respect to the housing | casing of parts (The thing of the same structure in a figure attaches | subjects the same number).

  In FIG. 4, it is set as the structure provided with the opening-and-closing part 23 combined with the different material A21 and the different material B22 provided in the duct exit 20. FIG. Note that the basic configuration of the induction heating cooker is the same as that of the first embodiment, and the motor and the temperature sensor for opening and closing the opening / closing part 23 are removed from the first embodiment.

  The operation | movement and effect | action are demonstrated below about the opening / closing part 23 of the induction heating cooking appliance comprised as mentioned above.

  As shown in FIG. 5, the opening / closing part 23 has a combination of opposing properties such that the dissimilar material B22 contracts and the dissimilar material A21 expands depending on the temperature. When it is exposed to the opening / closing part 23, the opening / closing part 23 gradually closes according to the exposed temperature, and as it returns to a predetermined temperature, the opening / closing part 23 gradually opens according to any temperature. Is.

  According to the above configuration, as shown in FIG. 6, for example, when exposed to high temperatures, the opening / closing part 28 performs a closing operation, so that a certain amount of cooling air 26 from the cooling fan 29 is compressed inside the duct 27, Are arbitrarily distributed to the outlets 24 and 25 of the duct 27. In the case of this embodiment, the air volume and air pressure of the outlet 24 are increased, and the cooling effect on the outlet 24 side is enhanced. That is, the opening / closing operation of the opening / closing part 28 can be arbitrarily performed according to the temperature state inside the main body, and the cooling air 26 can be concentrated on a portion where the cooling effect is desired to be enhanced at a high temperature. Further, since a small motor and a temperature sensor for driving the opening / closing part 28 can be reduced, a relatively inexpensive configuration can be achieved.

  Further, when a shape memory type resin material is used for the opening / closing part, the opening / closing operation can be performed only by using a single material, so that the configuration can be simplified and the cost can be reduced.

  In addition, when shape memory type resin materials are combined in a bimetallic configuration, the amount of thermal deformation can be conveniently selected by the combination pattern, so parts can be selected according to the temperature characteristics in the housing, and the opening and closing parts can be opened and closed. Adjustments can be made arbitrarily.

  As described above, the induction heating cooker according to the present invention is provided with a duct for circulating cooling air inside the main body, a sliding window for controlling the air volume is installed at one of the duct outlets, and inside the main body. The sliding window opens and closes according to the temperature difference of the installed temperature sensor to adjust the opening and closing level, thereby controlling the air volume and pressure, thereby concentrating the high temperature part inside the main unit. Since it is possible to cool and prevent thermal destruction due to internal high temperature, it can be applied to other household appliances that use a cooling fan to cool the control circuit.

The figure which shows the cooling structure of the induction heating cooking appliance in Embodiment 1 of this invention. The operation | movement principal part enlarged view of the sliding window of the induction heating cooking appliance in Embodiment 1 of this invention Crank mechanism operation diagram of sliding window of induction heating cooker in Embodiment 1 of the present invention The figure which shows the cooling structure of the induction heating cooking appliance in Embodiment 2 of this invention. The figure which shows the operation principle of the opening-and-closing part of the induction heating cooking appliance in Embodiment 2 of this invention. The figure which shows the effect | action of the opening-and-closing part of the induction heating cooking appliance in Embodiment 2 of this invention. Cooling configuration diagram of a conventional induction heating cooker

Explanation of symbols

9 Body 1, 2 Heating coil 5 Control circuit 6, 29 Cooling fan 3, 4 Temperature sensor 10, 27 Duct 20, 24, 25 Duct outlet 8, 15 Sliding window 16 Crank mechanism 7, 26 Cooling air 21 Dissimilar material A
22 Dissimilar material B
23, 28 Opening and closing parts

Claims (9)

A heating coil inside the main body, a control circuit for supplying a high frequency current to the heating coil, and a cooling fan for cooling the control circuit, a duct for circulating cooling air inside the main body in the cooling fan The duct has two outlets, one of which is provided with a sliding window for controlling the air volume, and the sliding window is opened and closed according to the temperature detected by a temperature sensor installed inside the main body. Induction heating cooker that made possible. The induction heating cooker according to claim 1, wherein the opening / closing adjustment of the sliding window is performed by a crank mechanism. The induction heating cooker according to claim 1 or 2, wherein the sliding window performs sliding opening / closing adjustment according to a difference between left and right temperature of two temperature sensors installed in a left and right heating coil inside the main body. The induction heating cooker according to claim 1 or 2, wherein the sliding window performs sliding opening / closing adjustment according to a temperature state of a plurality of temperature sensors installed on a heating coil and a wall surface inside the main body. The induction heating cooker according to any one of claims 1 to 4, wherein a stepping motor is used as a power source to perform opening / closing adjustment of the sliding window. The induction heating cooker according to claim 1, wherein the duct outlet performs opening / closing adjustment by installing an opening / closing part formed by combining different materials A and B for controlling the air volume of the cooling air. The induction heating cooker according to claim 1, wherein the duct outlet performs opening / closing adjustment by installing an opening / closing part using a shape memory type resin for controlling the amount of cooling air. The induction heating cooker according to claim 7, wherein the shape memory type resin has a bimetal configuration. The induction heating cooker according to any one of claims 1 to 8, wherein a plurality of duct outlets are provided.

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