JP2000058722A - Radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small-sized or thin and inexpensive radiator having a sufficient heat radiating ability by constituting the radiator by thermally coupling wire rods with a metallic plate having a good heat conducting characteristic. SOLUTION: A radiator 7 is constituted by thermally coupling wire rods 9 with a metallic plate 8 composed of a good heat conductor. A high-frequency magnetic field is generated from an induction heating coil 6 when a high-frequency current is supplied to the coil 6 from a high-frequency inverter 4 and a rice cooking pan 3 is heated for an eddy current by electromagnetic induction. The heat generating parts 5 of the circuit parts constituting the inverter 4 accelerate heat radiation by means of a radiator 7. Therefore, a small-sized or thin and inexpensive radiator having a sufficient heat radiating ability can be obtained, because the surface area of the radiator can be increased and the material cost of the wire rods 9 is low.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator.

[0002]

2. Description of the Related Art In the design of high-output equipment or equipment that has a limit in cooling performance such as a fan due to a smaller housing,
Heat dissipation of heat-generating components in a device is a very big problem. At present, a method of thermally connecting a heat-generating component and a radiator to radiate heat is generally used. In most cases, the radiator is formed by processing a metal plate having good thermal conductivity such as aluminum and forming wing-like or rod-like protrusions. FIG. 7 shows an example of a conventional radiator. In FIG. 7, reference numeral 1 denotes a radiator, and 2 denotes a heat-generating component thermally coupled to the radiator 1. The heat radiation performance of the radiator depends on the surface area, the weight, the cooling condition of the installed device, and the like, and a radiator having a heat radiation performance suitable for each device is selected.

[0003]

However, in recent years, there has been a tendency to further reduce the size and cost of equipment, and the size and cost of the radiator are also significant factors. Conventional heatsinks that are small and complex processed have excellent heat dissipation performance but are expensive, and those that are simple processing only have low cost but poor heat dissipation performance under severe cooling conditions. There was such a problem.

[0004] In view of the above, the present invention provides a low-cost radiator which is smaller or thinner than the conventional one and has sufficient heat radiation performance.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a metal plate having good heat conduction characteristics and a plurality of wires, and the metal plate and the plurality of wires are thermally connected. To provide a heat sink.

[0006]

The invention according to claim 1 is a radiator comprising a metal plate having good thermal conductivity and a plurality of wires, wherein the metal plate and the plurality of wires are thermally coupled. Things. According to the first means, the surface area can be increased by a plurality of wires, and the cost of the wires is generally low. Therefore, a small or thin, low-cost radiator having sufficient heat radiation performance can be obtained. Can be provided.

According to a second aspect of the present invention, in particular, a radiator in which a plurality of wires are arranged in the same plane as a metal plate. According to the second means, a very thin radiator can be provided.

According to a third aspect of the present invention, there is provided a radiator in which a plurality of wires are arranged particularly in a direction perpendicular to the surface of the metal plate. According to the third means, a very small radiator can be provided.

The invention according to claim 4 is a radiator in which a plurality of wires are arranged particularly in the same plane as the metal plate and in the vertical direction. According to the fourth means, it is possible to provide a radiator having extremely enhanced heat radiation performance.

A fifth aspect of the present invention provides a radiator in which a plurality of wires are formed in a circular shape. According to the fifth means, a circular wire can be used as an electromagnetic shield.

According to the sixth aspect of the present invention, the influence of leakage magnetic flux, unnecessary radiation, and the like can be suppressed by using a magnetic shielding material so that the metal plate portion can be used as a magnetic shielding plate.

[0012]

(Embodiment 1) An embodiment of the present invention will be described below with reference to an induction heating rice cooker. First, an embodiment of the first means will be described with reference to the drawings. In FIG. 1, 3 is a rice cooker, 4 is a high-frequency inverter, 5 is a heating component that constitutes the high-frequency inverter 4,
6 is connected to the high frequency inverter 4 and the rice cooker 3
An induction heating coil disposed at the bottom, 7 is the heating component 5
And a radiator thermally coupled to the radiator. The radiator 7 is configured by thermally connecting a metal plate 8 of a good heat conductor and a plurality of wires 9.

A high frequency magnetic field is generated from the induction heating coil 6 by the high frequency current supplied by the high frequency inverter 4, and the rice cooker 3 is heated by an eddy current due to electromagnetic induction. Some of the circuit components constituting the high-frequency inverter 4 generate heat due to the flow of a large high-frequency current, and need to be dissipated. Will be promoted. Since the radiator 7 is composed of the plurality of wires 9, the surface area can be increased, and the material cost of the plurality of wires 9 is low. A low-cost radiator having heat radiation performance can be provided.

(Embodiment 2) As shown in FIG. 2, in a radiator 12 constituted by thermally connecting a metal plate 10 of a good heat conductor and a plurality of wires 11, in particular, the plurality of wires By arranging 11 in the same plane as the metal plate 10, a very thin radiator can be provided.

(Embodiment 3) As shown in FIG. 3, in a radiator 15 in which a metal plate 13 of a good heat conductor and a plurality of wires 14 are thermally connected, in particular, the plurality of wires By arranging 14 vertically with respect to the metal plate 13, a very small radiator can be provided.

(Embodiment 4) As shown in FIG. 4, in a radiator 18 in which a metal plate 16 of a good heat conductor and a plurality of wires 17 are thermally connected to each other,
By disposing in the same plane as the metal plate 16 and in the vertical direction, it is possible to sufficiently cope with a case where high heat radiation performance is required.

(Embodiment 5) Next, an embodiment of the fifth means will be described with reference to the drawings. In FIG. 5, 1
9 is a rice cooker, 20 is a high-frequency inverter, 21 is a heating component constituting the high-frequency inverter 20, 22 is an induction heating coil connected to the high-frequency inverter 20 and arranged at the bottom of the rice cooker 19, and 23 is the heating component And a radiator thermally coupled to the radiator 21. The radiator 23 is configured by thermally connecting a metal plate 24 of a good heat conductor and a plurality of wires 25 to each other. The plurality of wires 25
Is formed in a circular shape, and is arranged so as to surround the outer periphery of the rice cooker 19.

The high-frequency current supplied by the high-frequency inverter 20 generates a high-frequency magnetic field from the induction heating coil 22, and the rice cooker 19 is heated by the eddy current due to the electromagnetic induction. The high frequency inverter 20
The heat-generating component 21 requiring heat radiation is accelerated by the heat radiator 23. When a high-frequency magnetic field is generated from the induction heating coil 22, the rice cooker 19
Leakage magnetic flux that does not contribute to the heating of the device is radiated to the surroundings. However, due to the eddy currents induced in the plurality of wires 25 and the resulting repelling magnetic field, the influence of the leakage magnetic flux on the surroundings can be significantly reduced.

(Embodiment 6) Next, an embodiment of the sixth means will be described with reference to the drawings. In FIG. 6, 2
6 is a rice cooker, 27 is a high-frequency inverter, 28 is a heat-generating component constituting the high-frequency inverter 27, 29 is an induction heating coil connected to the high-frequency inverter 27 and arranged at the bottom of the rice cooker 26, 30 is the heat-generating component A radiator, which is thermally coupled to 28 and is disposed below the induction heating coil 29, 31 is a housing, and 32 is a rice cooker mounting surface. The radiator 30 includes a metal plate 33 of a good heat conductor.
And a plurality of wires 34 are thermally coupled.

A high frequency magnetic field is generated from the induction heating coil 29 by the high frequency current supplied by the high frequency inverter 27, and the rice cooker 26 is heated by an eddy current due to electromagnetic induction. The high frequency inverter 27
The heat-generating component 28 requiring heat radiation is accelerated by the radiator 30. When a high-frequency magnetic field is generated from the induction heating coil 29, the rice cooker 26
Leakage flux not contributing to the heating of the radiator is radiated to the surroundings. However, since the electromagnetic plate is electromagnetically shielded by the metal plate 33 of the radiator 30, the distance between the induction heating coil 29 and the rice cooker mounting surface 32 is short, and the material of the rice cooker mounting surface 32 is metal. In this case, the induction heating of the rice cooker mounting surface 32 due to the leakage magnetic flux can be suppressed.

[0021]

As described above, according to the first aspect of the present invention, a metal plate having good heat conduction characteristics and a radiator configured by thermally connecting a plurality of wires are formed, thereby providing a plurality of radiators. Since the surface area can be increased by the wire and the cost of the wire is generally low, it is possible to provide a low-cost radiator that is small or thin and has sufficient heat radiation performance.

According to the second aspect of the present invention, a radiator having a plurality of wires disposed on the same plane as the metal plate is provided, so that a very thin radiator can be provided.

According to the third aspect of the present invention, a radiator in which a plurality of wires are arranged particularly in a direction perpendicular to the surface of the metal plate can be provided, so that a very small radiator can be provided.

According to the fourth aspect of the present invention, there is provided a radiator in which a plurality of wires are arranged in the same plane as the metal plate and in the vertical direction, and a radiator having extremely enhanced heat radiation performance is provided. You can do it.

According to the fifth aspect of the present invention, the radiator is formed by arranging a plurality of wires in a circular shape, and the circular wires can be used as an electromagnetic shield.

According to the sixth aspect of the present invention, since the metal plate portion is used as a radiator that is used as a magnetic shield plate, it is possible to suppress the influence of leakage magnetic flux, unnecessary radiation, and the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of an induction heating rice cooker according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a radiator according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a radiator according to a third embodiment of the present invention.

FIG. 4 is a perspective view of a radiator according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view of an induction heating type rice cooker according to a fifth embodiment of the present invention.

FIG. 6 is a perspective view of an induction heating type rice cooker according to a sixth embodiment of the present invention.

FIG. 7 is a perspective view of a conventional radiator.

[Explanation of symbols]

 1, 7, 12, 15, 18, 23, 30 Heat radiator 2, 5, 21, 28 Heating component 3, 19, 26, Cooking pot 4, 20, 27, High frequency inverter 6, 22, 29, Induction heating coil 8 , 10, 13, 16, 24, 33 Metal plate 9, 11, 14, 17, 25, 34 Plural wires 31 Housing 32 Mounting surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidekazu Yamashita 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 5F036 AA01 BB05 BD01

Claims (6)

[Claims] 1. A radiator comprising: a metal plate having good heat conduction characteristics; and a plurality of wires, wherein the metal plate and the plurality of wires are thermally coupled. 2. The radiator according to claim 1, wherein the plurality of wires are arranged in the same plane as the metal plate. 3. The radiator according to claim 1, wherein the plurality of wires are arranged in a direction perpendicular to a surface of the metal plate. 4. The radiator according to claim 1, wherein the plurality of wires are arranged in the same plane as the metal plate and in a vertical direction. 5. The radiator according to claim 1, wherein the plurality of wires are arranged in a circle. 6. A metal plate comprising a magnetic shield material.
The radiator described.