JP3133422U - Heat exchanger - Google Patents

Abstract

[PROBLEMS] A heat exchange device mainly used for cooling an electronic component, which combines a heat exchange function and a blower function from a central part to an outer peripheral part, and is smaller than a conventional product and has better heat exchange efficiency. A heat exchange device is provided.
A rotating body having a plurality of concentric wall surfaces provided on a base member and a protrusion that faces and approaches the wall surface is provided, and fluid between the protrusion and the wall surface induces rotation of the rotating body. It is a heat exchanging device configured to exchange heat by rotating.
[Selection] Figure 1

Description

  The present invention relates to a heat exchange device used for local cooling of electronic devices and the like, and particularly to provide a heat exchange device that is small and has high heat exchange efficiency.

As main ones used for the above-mentioned applications, there are cooling devices combining a heat radiating member having a plurality of fin-like protrusions, an axial fan, a cross flow fan, and the like.
However, in many cases, the flow velocity of the gas passing between the fin-like projections is slow, particularly at the outer edge portion, and sufficient cooling efficiency is not obtained. Furthermore, in the conventional heat exchanging device, since the air blowing function and the heat exchanging function are separated, it is necessary to increase the diameter of the fan in order to overcome the resistance of the flow path and effectively flow the fluid. Therefore, since it is an obstacle to the small size of the device, a considerably large size is required to dissipate a necessary amount of heat.

As a countermeasure against this, there is a method of rotating a disk with protrusions (disturbing blades) close to the heating element, but since the surface of the heating element is flat, a sufficient heat dissipation effect cannot be obtained.
JP, 05-006950, A There is a method of radiating heat by utilizing the relative speed with respect to the fixed part by rotating the flow path itself, but the structure is complicated and it does not meet the above purpose. Absent. Japanese Patent No. 026167076

  The present invention has been established under the above-mentioned background, and provides a heat exchange device that has a small and simple structure and high local heat exchange efficiency.

  A first means of the present invention is provided with a rotating body having a plurality of concentric wall surfaces provided on a base member and a protrusion that faces and approaches the wall surface, and the fluid between the protrusion and the wall surface is The present invention provides a heat exchanging device configured to rotate by being induced by the rotation of the rotating body and to flow from the center side of the rotating body toward the outer periphery through the gap between the wall surface and the protrusion by the centrifugal force.

  The second means of the present invention is to provide the above heat exchange device in which a protrusion in the rotating body is provided with a circumferential cutout.

  The third means of the present invention is to provide the above heat exchanging device in which a radial protrusion is provided on the rotating body.

As shown in the above-mentioned means, the heat exchanging device of the present invention is provided with a rotating body having a plurality of concentric wall surfaces provided on a base member, and a protrusion that faces and approaches the wall surface. The fluid between the wall surfaces is induced by the rotation of the rotating body and rotates, and the centrifugal force causes the fluid of the base member to flow from the center side to the outer periphery through the gap between the wall surface and the protrusion. Can be efficiently transmitted to the fluid and released.
That is, the amount of heat transferred from the object to the fluid increases as the relative speed and area of both increase. In addition, as a means for flowing the fluid, it is desirable to flow from the center side toward the outer periphery using centrifugal force acting on the rotating body, but in order to effectively overcome the resistance of the flow path, the diameter of the outer periphery Must be increased. In the conventional heat exchange device, since the air blowing function and the heat exchange function are separated, it has been an obstacle to the small size of the device.

  The heat exchanging device of the present invention enables miniaturization of the device by combining the heat exchanging function and the air blowing function from the central portion to the outer peripheral portion of the device by the above means.

The structure of the present invention includes a rotating body having a plurality of concentric wall surfaces provided on a metal base member and concentric protrusions that are close to and opposed to the wall surfaces, and a fluid between the protrusions and the wall surfaces. However, it is configured to rotate as induced by the rotation of the rotating body and to flow from the center side of the rotating body toward the outer periphery through the gap between the wall surface and the protrusion by the centrifugal force. The material of the rotating body does not affect heat exchange, so light plastic can be used.
A heat exchanging device having such a structure is suitable for applications such as cooling by bringing the heat into contact with a CPU or the like.

  Here, the function of the rotating body in the present invention is to spray a fluid onto the concentric wall surface of the base member. It is effective to provide a circumferential notch. This notch allows the fluid to receive more rotational force due to the rotation of the rotating body.

  Further, radial protrusions can be provided to enhance the effect of the rotating body as a centrifugal fan. By doing so, the flow rate can be increased, and the heat absorbed by the fluid from the base member can be effectively released to the outside.

  Furthermore, the support stay for forming the fluid suction port in the vicinity of the center portion of the rotating body can be formed in a twisted shape about the radial direction. By doing so, the inflow resistance of the fluid can be reduced and the flow rate can be increased.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view showing the structure of an embodiment of the present invention.
In FIG. 1, the heat exchanging apparatus of the present invention is provided with a rotating body 3 having a plurality of concentric wall surfaces 2 provided on a base member 1 and a protrusion 4 that faces and approaches the wall surface 2. The fluid between the wall surfaces 2 is rotated by being induced by the rotation of the rotating body 3, and flows from the center side of the rotating body 3 toward the outer periphery through the gap between the wall surface 2 and the protrusion 4 by the centrifugal force. As a result, the heat of the base member can be efficiently transferred to the fluid and released. Reference numeral 5 denotes a motor for driving the rotator, where A indicates the flow of the suction fluid and B indicates the flow of the discharge fluid. By bringing the C surface into contact with the heating element, the heat can be transferred to the fluid and released.

FIG. 2 is a partial perspective view showing the structure of one embodiment of the present invention.
In FIG. 2, the function of the rotating body 3 is to spray a fluid onto the concentric wall surface 2 of the base member 1, and the protrusion 4 of the rotating body 3 has a circular shape concentric with the concentric wall surface 2 in order to enhance the effect. It is effective to provide a plurality of circumferential notches 6 on the surface. With this notch 6, the fluid can receive more rotational force due to the rotation of the rotating body 3.

  Further, in order to enhance the effect of the rotating body 3 as a centrifugal fan, a radial projection 7 can be provided. By doing so, the flow rate can be increased, and the heat absorbed by the fluid from the base member 1 can be effectively released to the outside.

  Furthermore, the support stay 9 for forming the fluid suction port 8 in the vicinity of the center of the rotating body 3 can be formed in a twisted shape with the radial direction as an axis. By doing so, the inflow resistance of the fluid can be reduced and the flow rate can be increased.

  In the above description, the fluid is not limited. In general, air is mainly used. However, it is needless to say that other gases can be used depending on the application, and liquids can be applied in the same configuration.

It is a sectional side view which shows the structure of one Embodiment of this invention. It is a fragmentary perspective view which shows the structure of embodiment of FIG.

Explanation of symbols

1: base 2: wall surface 3: rotating body 4: protrusion 5: motor 6: notch 7: radial protrusion 8: suction port 9: stay

Claims (1)

  A rotating body having a plurality of concentric wall surfaces provided on the base member and a protrusion facing and approaching the wall surface is provided, and fluid between the protrusion and the wall surface is induced by the rotation of the rotating body. A heat exchange device configured to rotate and flow through the gap between the wall surface and the protrusions from the center side toward the outer periphery by the centrifugal force.

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