WO2018216381A1 - Cooling device - Google Patents

Abstract

This cooling device is provided with: a housing having an air intake comprising a plurality of holes having a predetermined first width; a fluid control unit which moves fluid to take the fluid from the air intake into the housing; and a heat radiator which is provided in the housing, is disposed in a flow passage for air having been taken into the housing by the fluid control unit, and has a plurality of fins for radiating heat to air flowing near the plurality of fins, the distance between at least some of the plurality of fins being greater than the first width.

Description

Cooling system

This invention relates to the cooling device provided with the thermal radiation part which has a some fin.

The endoscope is used by being connected to an electronic device including a light source device that emits illumination light for irradiating a subject, as disclosed in, for example, International Publication No. WO2015 / 064470.

As disclosed in International Publication No. WO2015 / 064470, a heat generating part such as a light source device included in an electronic device is cooled by an electric fan and a heat sink. In addition, examples of the heat generating unit included in the electronic device include a processor that performs image processing.

When cooling the heat generating part of an electronic device with an electric fan and a heat sink, air outside the device is taken into the electronic device, so foreign matter such as dust in the air also enters the electronic device. The foreign matter that has entered the electronic device adheres to the heat sink and causes the heat dissipation performance of the heat sink to deteriorate.

The present invention solves the above-described problems, and an object of the present invention is to provide a cooling device that reduces the adhesion of foreign matter to the heat radiating portion.

A cooling device according to an aspect of the present invention includes a housing having an air intake portion including a plurality of holes having a predetermined first width, and a fluid that moves the fluid into the housing to move the fluid from the air intake portion. A control unit, and a plurality of fins disposed in the flow path of air provided in the casing and taken in the casing by the fluid control unit, and radiating heat to the air passing through the vicinity. And a heat dissipating part in which at least some of the fins have a spacing larger than the first width.

It is a perspective view which shows the front side of an electronic device provided with a cooling device. It is a perspective view which shows the back side of an electronic device provided with a cooling device. It is sectional drawing which looked at the inside of the housing | casing of the electronic device of 1st Embodiment from upper direction. It is sectional drawing which looked at the inside of the housing | casing of the electronic device of 2nd Embodiment from upper direction. It is sectional drawing which looked at the inside of the housing | casing of the electronic device of 3rd Embodiment from upper direction. It is sectional drawing which looked at the inside of the housing | casing of the electronic device of 4th Embodiment from upper direction. It is sectional drawing which looked at the inside of the housing | casing of the electronic device of 5th Embodiment from upper direction.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the drawings used for the following description, the scale of each component is made different in order to make each component recognizable on the drawing. It is not limited only to the quantity of the component described in (1), the shape of the component, the ratio of the size of the component, and the relative positional relationship of each component.

In the following description, “upper” refers to a position that is further away from the ground relative to the comparison target, and “lower” refers to a position that is closer to the ground relative to the comparison target. Moreover, the height in the following description shall show the height relationship along the gravity direction.

(First embodiment)
The electronic apparatus 1 according to the present embodiment shown in FIGS. 1 and 2 is an apparatus that is used together with the endoscope 100. The electronic device 1 can communicate with an imaging device 110 included in the endoscope 100 by wire or wirelessly, generates an observation image based on a signal input from the imaging device 110, and outputs an image to an image display device (not shown). A processing device is provided.

The imaging device 110 of the endoscope 100 has a configuration for capturing one or both of an optical image and an ultrasonic tomographic image of a subject. Since the configuration of the endoscope 100 is known, a detailed description thereof will be omitted.

In this embodiment, as an example, the electronic apparatus 1 includes a receptacle-shaped connector portion 3 to which a plug-shaped connector 101 included in the endoscope 100 can be connected. The electronic device 1 is electrically connected to the imaging device 110 of the endoscope 100 via the connector unit 3 and performs operation control and power supply of the imaging device 110.

In addition, the electronic apparatus 1 includes a light source device that generates illumination light for irradiating the subject of the imaging device 110. The light source device includes a light emitting diode, a laser diode, and the like, and makes illumination light incident on an optical fiber bundle included in the endoscope 100 connected to the connector unit 6.

The light source device and the processor of the image processing apparatus included in the electronic device 1 include a heat generating unit 4 that generates a large amount of heat during operation and requires cooling. And the electronic device 1 is provided with the cooling device 10 mentioned later which cools the heat generating part 4. FIG.

The casing 2 of the electronic device 1 has a rectangular parallelepiped box shape, and houses the heat generating portion 4 inside the casing 2. In a state where the electronic device 1 is placed on a surface substantially parallel to the ground in a usable posture, the connector unit 3 is disposed on one surface that stands upright with respect to the ground. In the following description, the surface on which the connector portion 3 is disposed is referred to as a front surface 2a. Further, the surface opposite to the front surface 2a of the housing 2 is referred to as a back surface 2b, and when facing the front surface 2a, the right side surface is referred to as a left side surface 2c, and the left side surface is referred to as a right side surface 2d.

FIG. 3 shows a view of the inside of the electronic device 1 as viewed from above. In FIG. 3, the surface facing rightward in the figure is the front surface 2 a of the housing 2. As described above, the electronic device 1 includes the cooling device 10 and the heat generating unit 4 accommodated in the housing 2. In the illustrated embodiment, as an example, the heat generating unit 4 is a light source device.

The cooling device 10 includes an intake unit 11, an exhaust unit 12, a fluid control unit 13, and a heat dissipation unit 15.

The air intake portion 11 is composed of a plurality of air intake ports 11a that allow the inside and outside of the housing 2 to communicate with each other. The intake port 11a is a hole having a predetermined first width D1. Here, the width of the intake port 11a is assumed to be the diameter of the largest sphere that can pass through the intake port 11a.

For example, when the intake port 11a is a circular hole, the width of the intake port 11a matches the inner diameter of the circular opening. Further, for example, when the intake port 11a is an elongated rectangular hole, the width of the intake port 11a matches the length of the short side of the opening. For example, when the intake port 11a is a polygonal hole such as a triangle or a hexagon, the width of the intake port 11a matches the diameter of a circle inscribed in the polygonal opening.

In the illustrated embodiment, as an example, the intake port 11a is a circular hole. In addition, the intake part 11 may be provided with the intake ports 11a having a plurality of different shapes. In this case, each intake port 11a is formed under the condition that the width is equal to or smaller than the first width D1.

The exhaust unit 12 includes a plurality of exhaust ports 12a that allow the inside and outside of the housing 2 to communicate with each other. The exhaust port 12a is a hole having a predetermined second width D2. Here, it is assumed that the width of the exhaust port 12a is the diameter of the largest sphere that can pass through the exhaust port 12a.

For example, when the exhaust port 12a is a circular hole, the width of the exhaust port 12a matches the inner diameter of the circular opening. For example, when the exhaust port 12a is an elongated rectangular hole, the width of the exhaust port 12a matches the length of the short side of the opening. For example, when the exhaust port 12a is a polygonal hole such as a triangle or a hexagon, the width of the exhaust port 12a matches the diameter of a circle inscribed in the polygonal opening.

In the illustrated embodiment, as an example, the exhaust port 12a is an elongated rectangular hole. The exhaust unit 12 may include exhaust ports 12a having a plurality of different shapes. In this case, each exhaust port 12a is formed under the condition that the width is equal to or larger than the second width D2.

The location where the intake portion 11 and the exhaust portion 12 are disposed in the housing 2 is not particularly limited. In the present embodiment, as an example, the intake portion 11 is disposed on the left side surface 2 c of the housing 2, and the exhaust portion 12 is disposed on the back surface 2 b of the housing 2.

The fluid control unit 13 moves the fluid into the housing 2 from the intake unit 11 by moving the fluid. Further, the fluid control unit 13 discharges the fluid taken into the housing 2 from the intake unit 11 from the exhaust unit 12 to the outside of the housing 2.

Specifically, the fluid that the fluid control unit 13 moves is air. The fluid control unit 13 includes one or more electric fans. The form of the fluid control unit 13 is not particularly limited, and the fluid control unit 13 may be an axial fan, a centrifugal fan, or a combination thereof.

Further, the place where the fluid control unit 13 is disposed is not particularly limited. In the illustrated embodiment, as an example, the fluid control unit 13 is disposed adjacent to the exhaust unit 12 in the housing 2. The fluid control unit 13 may be disposed outside the housing 2 or may be disposed adjacent to the intake unit 11.

As the fluid control unit 13 operates, air flows from the intake unit 11 toward the exhaust unit 12 in the housing 2. Hereinafter, the space in which the air flows by the operation of the fluid control unit 13 in the housing 2 is referred to as a flow path 14. Part or all of the flow path 14 may be partitioned from other spaces in the housing 2 by an inner wall surface of the housing 2 or a wall-like member disposed in the housing 2. A part or all of the flow path 14 may be partitioned from other spaces in the housing 2 by a tubular member such as a duct.

The heat dissipation unit 15 is one or a plurality of heat sinks disposed in the flow path 14 in the housing 2. The heat radiating unit 15 transmits the heat generated by the heat generating unit 4 to the air flowing through the flow path 14. The heat dissipation part 15 includes a plurality of fins 15a. The fins 15a included in the heat radiating unit 15 may be plate-shaped or columnar.

Among the plurality of fins 15a provided in the heat dissipation part 15, at least some of the adjacent gaps 15a between the fins 15a are larger than the first width D1 of the air inlet 11a. Here, the interval d between the adjacent fins 15a is assumed to be the diameter of the largest sphere that can pass between the adjacent fins 15a. The distance d between the fins 15a adjacent to each other may be the same value or different values with respect to the fins 15a included in the heat radiating unit 15.

In the present embodiment, as an example, the distance d between all the fins 15a included in the heat radiation unit 15 is a constant value. That is, in the present embodiment, the distance d between all the fins 15a included in the heat radiating unit 15 is larger than the first width D1 of the air inlet 11a. In other words, in the present embodiment, the first width D1 of the air inlet 11a is smaller than the interval d between all the fins 15a included in the heat radiating unit 15.

The cooling device 10 having the above-described configuration operates the fluid control unit 13 so that the air taken into the housing 2 via the intake unit 11 passes through the heat radiating unit 15 and then the exhaust unit 12. To the outside of the housing 2. In the heat radiating unit 15, the heat generated by the heat generating unit 4 is transmitted to the air passing through the heat radiating unit 15. Therefore, the cooling device 10 can discharge the heat generated by the heat generating part 4 to the outside of the housing 2 and cool the heat generating part 4.

Here, in the cooling device 10 of the present embodiment, the first width D1 of the air intake port 11a is smaller than the interval d between all the fins 15a included in the heat radiating unit 15, and thus floats in the air outside the housing 2. It is possible to prevent or suppress the foreign matter having a size that cannot pass between the adjacent fins 15 a from flowing into the flow path 14.

In the cooling device 10 of the present embodiment, there is a possibility that a foreign substance having a size that can pass through the intake port 11a may pass between the plurality of fins 15a arranged at a distance d wider than the width D1 of the intake port 11a. high.

As described above, in the cooling device 10 according to the present embodiment, the intake port 11a captures a foreign substance having a size that may not pass between the adjacent fins 15a of the heat dissipation unit 15 and may adhere to the heat dissipation unit 15. Therefore, the adhesion of foreign matter to the heat radiating portion 15 can be reduced. Further, since the intake port 11a is opened on the outer surface of the housing 2, the work of removing foreign matter captured at the intake port 11a can be easily performed.

(Second Embodiment)
The second embodiment of the present invention will be described below. Hereinafter, only differences from the first embodiment will be described, and the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate. FIG. 4 is a view of the inside of the housing 2 of the present embodiment as viewed from above.

The second width D2 of the exhaust port 12a of the cooling device 10 of the present embodiment is larger than the interval d between the fins 15a adjacent to each other in the heat radiating unit 15. That is, in the present embodiment, there is a high possibility that a foreign substance having a size that can pass between the fins 15a of the heat radiating portion 15 will pass through the exhaust port 12a. Therefore, in the cooling device 10 of the present embodiment, the foreign matter that has entered the flow path 14 via the intake port 11a can be discharged out of the housing 2 without being attached to the exhaust part 12. That is, in the present embodiment, it is possible to prevent or suppress the foreign matter that has entered the flow path 14 via the intake port 11a from remaining in the housing 2.

Note that, in the cooling device 10 of the present embodiment, it is possible to reduce the adhesion of foreign matter to the heat radiating unit 15 as in the first embodiment.

(Third embodiment)
The third embodiment of the present invention will be described below. Hereinafter, only differences from the first embodiment will be described, and the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate. FIG. 5 is a view of the inside of the housing 2 of the present embodiment as viewed from above.

The cooling device 10 of the present embodiment includes a flow path changing unit 16 that bends or bends the flow path 14. The flow path changing unit 16 includes at least a wall surface 16a facing the flow path 14 having a curved or bent shape. The wall surface 16a is disposed outside the curved or bent portion of the flow path 14.

The wall surface 16a may be a part of the inner surface of the duct surrounding the flow path 14, or may be a part of the inner surface of the housing 2. Further, the wall surface 16 a may be configured by a combination of surfaces of a plurality of members arranged inside the housing 2.

The angle at which the flow path 14 is bent or bent by the flow path changing unit 16 may be an obtuse angle or an acute angle. The angle at which the flow path 14 is bent or bent by the flow path changing unit 16 may be 180 degrees.

The flow path changing unit 16 is disposed between the heat radiating unit 15 and the intake unit 11. That is, the heat radiating unit 15 is disposed on the downstream side of the flow path changing unit 16 in the flow path 14.

More specifically, the flow path changing unit 16 according to the present embodiment bends the flow path 14 of the air taken in from the intake section 11 provided on the side surface of the housing 2 in a direction toward the back surface 2b. That is, when viewed from above, the flow path changing unit 16 is disposed at an angle at which one end intersects the left side surface 2c provided with the intake unit 11 on the front surface 2a side with respect to the intake unit 11. The other end portion includes a wall surface 16a formed so as to be spaced from the left side surface 2c on the back surface 2b side with respect to the one end portion and arranged at an angle along the left side surface 2c.

The cooling device 10 of the present embodiment having the above-described configuration operates the fluid control unit 13 so that the air taken into the housing 2 via the intake unit 11 is flowed by the flow path changing unit 16. After bending, the heat radiating part 15 is passed.

Here, the foreign matter that has entered the flow path 14 via the intake port 11a moves in a curved portion (bent portion) of the flow path 14 so as to be biased in a direction away from the curved center (outside) due to centrifugal force. In other words, in the present embodiment, the foreign matter present in the air taken into the housing 2 is positioned outside the curved center of the flow channel 14 on the downstream side of the curved portion and the curved portion of the flow channel 14. Move near the outer edge. In addition, a foreign substance having a particularly large mass or size is affected by centrifugal force, and therefore easily passes near the outer edge of the curved portion.

Therefore, in the cooling device 10 of the present embodiment, the foreign matter that has entered the flow path 14 via the intake port 11a can be moved so as to pass through the outer edge portion of the heat radiating portion 15. For this reason, in the cooling device 10 of this embodiment, it can prevent or suppress that a foreign material adheres to the center part of the thermal radiation part 15. FIG.

The central part of the heat radiating part 15 has the highest cooling efficiency because air flows most easily. Therefore, in the cooling device 10 of the present embodiment, the cooling performance can be maintained in a high state for a longer period of time by preventing or suppressing foreign matters from adhering to the central portion of the heat radiating portion 15.

Note that, in the cooling device 10 of the present embodiment, it is possible to reduce the adhesion of foreign matter to the heat radiating unit 15 as in the first embodiment.

Further, in the cooling device 10 of the present embodiment, the second width D2 of the exhaust port 12a is larger than the interval d between the fins 15a adjacent to each other in the heat radiating portion 15 as in the second embodiment shown in FIG. You may have a structure. In this case, also in the cooling device 10 of the present embodiment, as in the second embodiment, the foreign matter that has entered the flow path 14 via the intake port 11a is prevented or suppressed from remaining in the housing 2. it can.

(Fourth embodiment)
The fourth embodiment of the present invention will be described below. Hereinafter, only differences from the third embodiment will be described, and the same components as those in the third embodiment are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. FIG. 6 is a view of the inside of the housing 2 of the present embodiment as viewed from above.

In the cooling device 10 of the present embodiment, the interval d1 between the fins 15a1 arranged outside the channel 14 bent by the channel changing unit 16 is the interval between the fins 15a2 arranged inside the channel 14. It is larger than d2. In addition, the interval d1 between the fins 15a1 arranged on the outer side of the flow path 14 bent by the flow path changing unit 16 is larger than the first width D1 of the intake port 11a.

More specifically, in the present embodiment, the fin 15a1 disposed outside the flow path 14 bent by the flow path changing unit 16 is disposed on the side farther from the left side surface 2c than the center of the flow path 14. Some or all of the plurality of fins.

As described in the third embodiment, the outer side of the flow path 14 bent by the flow path changing unit 16 is a region in which foreign matter that has entered the flow path 14 via the intake port 11a flows unevenly. In the present embodiment, the distance d1 between the fins 15a1 arranged in the region where the foreign matter is likely to flow is made larger than the first width D1 of the intake port 11a, whereby the foreign matter adheres to the heat radiating portion 15. Can be reduced.

Further, in the present embodiment, heat dissipation is achieved by setting the interval d2 between the fins 15a2 arranged on the inner side, which is a portion where the possibility of the foreign matter is low, smaller than the interval d1 between the fins 15a1 arranged on the outer side. The surface area of the part 15 can be increased and the cooling performance of the heat radiating part 15 can be improved. In the present embodiment, the interval d2 between the fins 15a2 arranged on the inner side may be smaller than the first width D1 of the intake port 11a.

(Fifth embodiment)
The fifth embodiment of the present invention will be described below. Hereinafter, only differences from the third embodiment will be described, and the same components as those in the third embodiment are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. FIG. 7 is a view of the inside of the housing 2 of the present embodiment as viewed from above.

The cooling device 10 according to the present embodiment includes a ventilation member 17 disposed outside the flow path 14 bent by the flow path changing unit 16.

The ventilation member 17 is a net-like member provided with a plurality of ventilation holes 17a which are holes having a predetermined third width D3 smaller than the first width D1 of the intake port 11a. Here, it is assumed that the width of the vent 17a is the diameter of the largest sphere that can pass through the vent 17a. The ventilation member 17 is disposed at an angle that intersects the air flow direction in the flow path 14.

More specifically, in the present embodiment, the ventilation member 17 is disposed so as to protrude from the wall surface 16 a of the flow path changing unit 16 into the flow path 14.

That is, as described in the third embodiment, the ventilation member 17 is disposed in a region in which foreign matter that has entered the flow path 14 via the intake port 11a flows unevenly. In the present embodiment, a ventilation member 17 that is a net-like member having a ventilation port 17a that is smaller than the width D1 of the intake port 11a is arranged in a region where there is a high possibility that the foreign substance flows, so The foreign matter that has entered 14 can be collected.

Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and a cooling device with such a change. Is also included in the technical scope of the present invention.

This application is filed on the basis of the priority claim of Japanese Patent Application No. 2017-100831 filed in Japan on May 22, 2017, and the above disclosure is disclosed in the present specification, claims, It shall be cited in the drawing.

Claims (5)

A housing having an air intake section composed of a plurality of holes having a predetermined first width;
A fluid control unit that takes the fluid into the housing from the intake unit by moving the fluid;
A plurality of fins provided in the casing and disposed on a flow path of air taken into the casing by the fluid control unit and radiating heat to air passing through the vicinity; at least of the plurality of fins; A heat dissipating part in which an interval between some fins is larger than the first width;
A cooling device comprising: The casing is further disposed on the flow path of the air radiated by the fins, and is an exhaust made up of a plurality of holes having a predetermined second width larger than the interval between the at least some of the fins in the heat radiating portion. The cooling device according to claim 1, further comprising a portion. Furthermore, it has a flow path changing section that bends the flow path of the air taken in from the intake section,
The cooling device according to claim 1, wherein the heat dissipating unit is provided on the air flow path after being bent by the flow path changing unit. Furthermore, in the heat radiating section, the interval between the fins arranged outside the curved center in the flow path bent by the flow path changing section is arranged inside the curved center in the flow path. Greater than the spacing between the fins,
The cooling device according to claim 3. Further, a vent formed by a hole having a predetermined third width smaller than the first width and disposed outside the flow path bent by the flow path changing section from the intake section to the heat radiating section. The cooling device according to claim 3, further comprising a plurality of ventilation members.

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