JP3721137B2 - Outdoor housing structure and panel mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outdoor housing structure having a cooling structure for cooling communication equipment and a panel mounting structure thereof.
[0002]
[Prior art]
In recent years, semiconductor integrated circuits have been increasingly integrated, increased in capacity, and speeded up, and accordingly, the heat generation amount and heat generation density of communication devices using the semiconductor integrated circuits are also increasing. On the other hand, there is a growing demand for smaller and lighter communication devices from the market. Communication devices are now required to be installed in various vacant spaces, and it is no longer possible to predetermine the installation direction of communication devices in order to improve the heat dissipation of communication devices. is the current situation.
[0003]
As shown in FIG. 8, a conventional communication device having an outdoor housing structure includes a printed board 530 on which a semiconductor integrated circuit is mounted by a housing 520 having fins and a cover 510 having fins. Composed.
[0004]
In order to improve the cooling efficiency, it is necessary to define the installation direction of the communication device so that the fins are vertical.
[0005]
[Problems to be solved by the invention]
However, when considering the current installation space, there is a problem that this communication device cannot always be installed in a direction in which the cooling efficiency is good.
[0006]
An object of the present invention is to solve such a conventional problem and provide a small-sized outdoor housing structure having good cooling efficiency without depending on the direction of installation.
[0007]
[Means for Solving the Problems]
In the outdoor casing structure of the present invention, an outer cylinder and an inner cylinder are concentrically arranged to form a double cylinder, and a refrigerant retaining portion and a refrigerant circulation flow are formed in a space formed between the outer cylinder and the inner cylinder. A cooling cylinder in which a path is configured, and an accommodating portion that accommodates a communication device is configured inside the inner cylinder;
A cylinder lid for sealing the cooling cylinder in order to seal the accommodating part of the cooling cylinder;
A communication device including a printed board on which a heat generating component is mounted is housed in a housing portion of the cooling cylinder, and the cooling cylinder is sealed with the cylinder lid.
[0008]
In the outdoor housing structure of the present invention, the outer cylinder and the inner cylinder are concentrically arranged to form a double cylinder, and a retaining portion in which a refrigerant is retained in a space formed between the outer cylinder and the inner cylinder. A cooling cylinder in which a circulation path of the refrigerant is configured, and an accommodating portion for accommodating communication equipment is configured inside the inner cylinder;
A cylinder lid for sealing the cooling cylinder in order to seal the accommodating part of the cooling cylinder;
A communication device composed of a printed board on which a heat generating component is mounted is housed in a housing portion of the cooling cylinder, and the cooling cylinder is sealed with the cylinder lid. In the flow path, the refrigerant stopped in the stop portion evaporates due to heat from the printed board, and the evaporated vapor refrigerant rises along the inner surface of the outer cylinder and is cooled and condensed to be liquefied. The liquefied refrigerant is configured to descend along the wall surface of the inner cylinder by gravity and return to the retaining portion.
[0009]
Furthermore, the outdoor housing structure of the present invention is characterized in that the outer cylinder has fins extending to the outside.
[0010]
The outdoor casing structure of the present invention is characterized in that the inner cylinder has fins extending into a space formed between the outer cylinder and the inner cylinder.
[0011]
Furthermore, the outdoor housing structure of the present invention is characterized in that the inner cylinder and the outer cylinder are cylinders made of a metal material.
[0012]
Moreover, the outdoor housing structure of the present invention is characterized in that the cylindrical lid has a connector for connecting the printed board with a circuit.
[0013]
Furthermore, the outdoor housing structure of the present invention is characterized in that the cylindrical lid is configured to have means for mounting the printed board.
[0014]
Moreover, the outdoor housing structure of the present invention is characterized in that the cylinder lid is configured to have an O-ring for sealing the cooling cylinder.
[0015]
Furthermore, the outdoor housing structure of the present invention includes a heat radiating plate mounted on the printed board and conducting heat from the printed board to the inner cylinder.
[0016]
Moreover, the outdoor housing structure of the present invention is characterized in that the heat radiating plate is made of one of a metal material and graphite.
[0017]
Furthermore, the outdoor housing structure of the present invention is characterized in that the refrigerant is composed of either fluorocarbon or water.
[0018]
In the panel mounting structure of the present invention, the outer cylinder and the inner cylinder are concentrically arranged to form a double cylinder, and a cooling medium is formed by enclosing a refrigerant in a space formed between the outer cylinder and the inner cylinder. An outdoor casing structure configured by accommodating a printed board on which a heat generating component is mounted in a cylinder and sealing with a cylinder lid;
A shelf capable of inserting / removing a plurality of the outdoor casing structures;
A plurality of the outdoor housing structures are configured to be mounted on the shelf.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0020]
FIG. 1 is a structural diagram of an outdoor housing structure according to the present invention, FIG. 1 (a) is an external perspective view of an outdoor housing structure, and FIG. 1 (b) is a detailed perspective view of an outdoor housing structure. 2 is an exploded perspective view of the outdoor housing structure, FIG. 3 is an exploded perspective view of the cooling cylinder, FIG. 3A is an exploded perspective view of the cooling cylinder viewed from the right side, and FIG. FIG. 4 is an exploded perspective view of the cooling cylinder viewed from the left side, and FIG. 4 is a cross-sectional view of the outdoor housing structure.
[0021]
1, 2, and 4, an outdoor housing structure 100 of the present invention accommodates a heat generating component, for example, a printed board 52 on which a semiconductor integrated circuit is mounted, and a cooling cylinder that encloses a refrigerant 20. 10 and a cylinder lid 30 that seals the cooling cylinder 10. Further, a heat radiating plate 54 for efficiently transferring heat from the printed board 52 to the cooling cylinder 10 is provided. The tube lid 30 is provided with a connector 50 for connecting the printed board 52 to the circuit. Furthermore, an O-ring 32 for sealing the tube lid 30 and the cooling tube 10 is provided.
[0022]
As shown in FIG. 3, the cooling cylinder 10 is a double cylinder configured by concentrically arranging a radiator cylinder 12 that is an outer cylinder and a case cylinder 14 that is an inner cylinder. The radiator cylinder (outer cylinder) ) The refrigerant 20 is enclosed in a space formed between the case 12 and the case cylinder (inner cylinder) 14.
[0023]
The radiator cylinder (outer cylinder) 12 is a cylinder made of a metal material having good heat conduction, such as aluminum, copper, or stainless steel, and serves as the outer cylinder of the cooling cylinder 10. One end of the cylinder has a bottom plate 121, and the other end has an opening 123. Further, the outer periphery of the cylinder has a plurality of fins 122 protruding outward. ing. The radiator cylinder (outer cylinder) 12 preferably has a thin plate shell structure with a plate thickness of 1.5 to 2 mm, and the outer surface of the radiator cylinder (outer cylinder) 12 can withstand an outdoor environment. As described above, it is preferable that the coating has weather resistance and is suitable for an outdoor environment.
[0024]
The case cylinder (inner cylinder) 14 is made of the same material as the radiator cylinder (outer cylinder) 12 and has an outer diameter that is slightly smaller than the inner diameter of the radiator cylinder (outer cylinder) 12. It becomes the inner cylinder. A printed board 52 is accommodated inside the cylinder. The outer periphery of the cylinder is configured to have a plurality of fins 142 protruding outward. One end of the cylinder has an opening 143, and another end has a case bottom plate 16 having the same shape as that of the radiator cylinder (outer cylinder) 12. Further, another inner surface of one end is provided with a screw portion 141 for fastening with the tube lid 30 with a screw.
[0025]
The cooling cylinder 10 is assembled and configured as follows.
[0026]
First, the opening 143 of the case cylinder (inner cylinder) 14 is inserted into the opening 123 of the radiator cylinder (outer cylinder) 12, and the case cylinder (inner cylinder) 14 is housed inside the radiator cylinder (outer cylinder) 12.
[0027]
Then, the case bottom plate 16 of the case cylinder (inner cylinder) 14 and the edge of the radiator cylinder (outer cylinder) 12 are welded over the entire circumference. Thereby, a space for sealing the refrigerant is formed between the radiator cylinder (outer cylinder) 12 and the case cylinder (inner cylinder) 14.
[0028]
The air component is completely expelled from the space formed by the radiator cylinder (outer cylinder) 12 and the case cylinder (inner cylinder) 14, and the space is brought into a vacuum state.
[0029]
Next, a coolant 20, such as fluorocarbon or water, is injected into this space and sealed.
[0030]
In this way, the cooling cylinder 10 shown in FIG. 3 is configured.
[0031]
With reference to FIG. 2, the cylinder lid 30 has a ring attachment groove 302 for attaching the O-ring 32, and is fastened with a screw part 141 provided in the case cylinder (inner cylinder) 14 of the cooling cylinder 10. And a plurality of connectors 50 for connecting the printed board 52 to the circuit. Moreover, the cylinder lid 30 is configured to have a printed board insertion groove 303 on the inner surface thereof, on which the printed board 52 can be mounted.
[0032]
The heat radiating plate 54 contacts the printed board 52 and conducts heat from the printed board 52, and is inscribed in the case cylinder (inner cylinder) 14 of the cooling cylinder 10, from the printed board contacting part 541. The cooling cylinder contact portion 542 is configured to conduct the conducted heat to the case cylinder (inner cylinder) 14 of the cooling cylinder 10. The printed board contact portion 541 is configured in a flat plate shape according to the shape of the printed board 52, and the cooling cylinder contact portion 542 is configured to have an arcuate curved surface according to the inner surface shape of the case cylinder (inner cylinder) 14. Is done. Moreover, it is preferable that the heat sink 54 is comprised with material with favorable heat conduction, for example, aluminum, copper, or graphite. Further, the heat sink 54 is preferably a metal material having good electrical conduction in order to reduce electromagnetic noise from the printed board 52.
[0033]
The O-ring 32 is for sealing the cooling cylinder 10 and the cylinder lid 30 and is for keeping the waterproofness of the cooling cylinder 10 high.
[0034]
Next, an assembling method of the outdoor housing structure will be described with reference to FIG.
[0035]
First, the O-ring 32 is attached to the cylindrical lid 30 on which the connector 50 is mounted using the ring attachment groove 302.
[0036]
Next, the heat sink 54 is attached to the printed board 52.
[0037]
Next, the printed board 52 to which the heat sink 54 is attached is attached to the cylinder lid 30 using the printed board insertion groove 303. Then, the printed board 52 and the connector 50 are electrically connected.
[0038]
Next, the printed board 52 attached to the cylinder lid 30 is inserted into the cooling cylinder 10, and the cylinder lid 30 is rotated and screwed to the cooling cylinder 10.
[0039]
The cooling cylinder 10 is sealed by a cylinder lid 30 via an O-ring 32, and the inside of the cooling cylinder 10 in which the printed board 52 is mounted, that is, the inside of the case cylinder (inner cylinder) 14 has a high sealing pressure. It becomes an airtight space.
[0040]
In this way, as shown in FIG. 4, the refrigerant 20 is sealed in the space between the radiator cylinder (outer cylinder) 12 and the case cylinder (inner cylinder) 14 of the cooling cylinder 10, and the case cylinder (inner cylinder) 14 The outdoor housing structure 100 in which the printed board 52 is mounted is assembled.
[0041]
Next, the operation of the outdoor housing structure 100 will be described.
[0042]
FIG. 5 is a diagram showing an outdoor housing structure installed vertically and horizontally, FIG. 5 (a) shows a case where the outdoor housing structure 100 is installed vertically, and FIG. 5 (b) shows an outdoor housing structure. FIG. 6 is a diagram for explaining the cooling operation of the outdoor housing structure, and FIG. 6A is a diagram of the outdoor housing structure installed vertically. FIG. 6B is a cross-sectional view of the outdoor housing structure installed horizontally.
[0043]
The cooling operation in the case where the outdoor housing structure 100 is installed vertically will be described with reference to FIGS. 5 (a) and 6 (a).
[0044]
As shown in FIG. 5A and FIG. 6A, the outdoor housing structure 100 is installed with the cylinder lid 30 facing down and the cylinder axis direction of the cooling cylinder 10 being vertical. The refrigerant 20 stays at the lower part of the cooling cylinder 10 in the vicinity of the cylinder lid 30.
[0045]
In the outdoor housing structure 100 installed vertically, heat (201 in FIG. 6A) generated from the semiconductor integrated circuit mounted on the printed board 52 is first transmitted to the printed board 52, and then heat is dissipated. The space is transmitted to the plate 54, transmitted to the case cylinder (inner cylinder) 14, and the space between the radiator cylinder (outer cylinder) 12 and the case cylinder 14 (inner cylinder) of the cooling cylinder 10 is heated.
[0046]
Due to this heating, this space is in a highly decompressed state, so that the refrigerant that remains in the lower part of the cooling cylinder 10 evaporates and boils at a temperature lower than the boiling point of the liquid, and the refrigerant vapor becomes a pressure wave It moves along the wall surface of the case cylinder (inner cylinder) 14 at a speed close to the speed of sound (202 in FIG. 6A) and reaches the upper part of the cooling cylinder 10. When the vapor reaching the upper part is cooled at the upper part of the cooling cylinder 10, it condenses and releases latent heat to liquefy (203 in FIG. 6A). The liquefied refrigerant flows through the inner wall surface of the radiator cylinder (outer cylinder) 12 by the force of weight and returns to the lower part of the cooling cylinder 10 (204 in FIG. 6A). Thereafter, the refrigerant is boiled again and becomes a vapor, and passes through the heating unit and moves to the upper part of the cooling cylinder 10 to repeat the cycle, thereby cooling the printed board 52. In this way, a refrigerant circulation passage is formed.
[0047]
Next, the cooling operation when the outdoor housing structure 100 is installed horizontally will be described with reference to FIGS. 5B and 6B.
[0048]
As shown in FIGS. 5B and 6B, the outdoor housing structure 100 is installed such that the axial direction of the cooling cylinder 10 is horizontal.
[0049]
The refrigerant 20 is stopped at the lower part of the cooling cylinder 10.
[0050]
The refrigerant 20 staying at the lower part of the cooling cylinder 10 is evaporated by the heat from the printed board 52, cooled, condensed and liquefied as in the case of being installed vertically, and cooled through the wall surface by the force of gravity. Return to the bottom of 10. The printed board 52 is cooled by the circulation of the refrigerant.
[0051]
Since the cooling case 10 is a cylinder, the outdoor casing structure 100 configured in this way is high regardless of the orientation, and the refrigerant 20 is always stopped at the lower part and does not depend on the installation direction. Good cooling with a heat dissipation effect can be performed.
[0052]
By mounting such an outdoor housing structure 100 on a panel and mounting the panel with high density, a smaller device can be realized.
[0053]
FIG. 7 is a diagram showing a panel mounting structure of an outdoor housing structure.
[0054]
Referring to FIG. 7, the panel mounting structure 300 includes a plurality of panels 320 and a shelf 330 that accommodates the panels 320.
[0055]
The panel 320 is configured by mounting the front panel 310 on the outdoor housing structure 100. The front panel 310 has a grip portion for inserting and removing the panel 320 from the shelf 330. The panel 320 is a minimum unit of the apparatus configuration for maintenance and replacement.
[0056]
The panel mounting structure 300 is realized by mounting the panels 320 on the shelf 330 in units of panels. Maintenance replacement is performed in units of the panel 320.
[0057]
Since the outdoor housing structure 100 itself has a waterproof structure, the waterproof structure is taken in units of the panel 320. Therefore, the panel mounting structure also becomes a waterproof structure as a whole.
[0058]
By adopting such a panel mounting structure, a plurality of panels can be mounted with high density, which leads to downsizing of the apparatus itself and improvement of maintainability.
[0059]
【The invention's effect】
As described above, the outdoor housing structure of the present invention is configured to have a cylindrical cooling cylinder, so that it can be cooled well regardless of the orientation of the outdoor housing structure. Has the effect of being able to.
[0060]
In addition, the present invention is configured so that the refrigerant can be retained below the printed board, which is a heating element, regardless of the orientation of the outdoor casing structure. There is an effect that good cooling can be performed without depending on the above.
[0061]
Furthermore, since the present invention has no movable part and is configured to be cooled, there is an effect that an outdoor housing structure with low noise and low vibration can be provided.
[0062]
In addition, the present invention employs a seal structure with a high seal pressure using two parts, a cooling cylinder and a cylinder lid, and therefore has an effect that high waterproofness can be obtained.
[0063]
Furthermore, the present invention is configured such that the printed board is covered with a heat radiating plate made of a material having an electromagnetic shielding effect, and the printed board is configured to be accommodated in the cooling cylinder. It is possible to prevent leakage of generated electromagnetic noise and to obtain high shielding performance.
[0064]
Further, the present invention has an effect that a small and easy-to-maintain apparatus can be realized because the outdoor casing structure is configured as a maintenance unit panel and a plurality of panels are mounted on the shelf.
[Brief description of the drawings]
FIG. 1 is a structural diagram of an outdoor housing structure according to the present invention.
FIG. 2 is an exploded perspective view of an outdoor housing structure.
FIG. 3 is an exploded perspective view of a cooling cylinder.
FIG. 4 is a cross-sectional view of an outdoor housing structure.
FIG. 5 is a diagram showing an outdoor housing structure installed vertically and horizontally.
FIG. 6 is a diagram for explaining a cooling operation of the outdoor housing structure.
FIG. 7 is a diagram showing a panel mounting structure of an outdoor housing structure.
FIG. 8 is a structural diagram of a conventional outdoor housing.
[Explanation of symbols]
10 Cooling cylinder 12 Radiator cylinder (outer cylinder)
14 Case cylinder (inner cylinder)
20 Refrigerant 30 Cylinder lid 32 O-ring 50 Connector 52 Printed board 54 Heat sink 100 Outdoor housing structure 300 Panel mounting structure 320 Panel 330 Shelf

Claims (12)

An outer cylinder and an inner cylinder are concentrically arranged to form a double cylinder, and a refrigerant retaining portion and a refrigerant circulation channel are formed in a space formed between the outer cylinder and the inner cylinder. Inside the cooling cylinder in which the accommodating part for accommodating the communication device is configured,
A cylinder lid for sealing the cooling cylinder in order to seal the accommodating part of the cooling cylinder;
An outdoor housing structure characterized in that a communication device comprising a printed board on which a heat generating component is mounted is housed in a housing portion of the cooling cylinder, and the cooling cylinder is sealed with the cylinder lid. The outer cylinder and the inner cylinder are concentrically arranged to form a double cylinder, and in the space formed between the outer cylinder and the inner cylinder, a retaining portion for retaining refrigerant and a refrigerant circulation channel are configured, Inside the cylinder, a cooling cylinder in which a housing part for housing communication equipment is configured, and
A cylinder lid for sealing the cooling cylinder in order to seal the accommodating part of the cooling cylinder;
A communication device comprising a printed board on which a heat generating component is mounted is accommodated in an accommodating portion of the cooling cylinder, and the cooling cylinder is sealed with the cylinder lid. In the flow path, the refrigerant stopped in the stop portion evaporates due to heat from the printed board, and the evaporated vapor refrigerant rises along the inner surface of the outer cylinder and is cooled and condensed to be liquefied. The liquefied refrigerant is configured to descend along the wall surface of the inner cylinder by gravity and return to the stationary part. The outdoor casing structure according to claim 1, wherein the outer cylinder has a fin extending outward. The outdoor casing structure according to any one of claims 1 and 2, wherein the inner cylinder has a fin extending in a space formed between the outer cylinder and the inner cylinder. The outdoor casing structure according to claim 1, wherein the inner cylinder and the outer cylinder are cylinders made of a metal material. The outdoor casing structure according to any one of claims 1 and 2, wherein the tube lid is configured to have a connector for connecting the printed board with a circuit. The outdoor casing structure according to any one of claims 1 and 2, wherein the tube lid includes a means for mounting the printed board. The outdoor casing structure according to any one of claims 1 and 2, wherein the cylinder lid includes an O-ring for sealing the cooling cylinder. 3. The outdoor housing structure according to claim 1, further comprising a heat radiating plate mounted on the printed board to conduct heat from the printed board to the inner cylinder. 4. The outdoor housing structure according to claim 9, wherein the heat radiating plate is made of any one of a metal material and graphite. The outdoor housing structure according to any one of claims 1 and 2, wherein the refrigerant is composed of either fluorocarbon or water. An outer cylinder and an inner cylinder are concentrically arranged to form a double cylinder, and a heat generating component is mounted on a cooling cylinder configured by sealing a refrigerant in a space formed between the outer cylinder and the inner cylinder. An outdoor housing structure configured to contain a printed board and sealed with a cylinder lid;
A shelf capable of inserting / removing a plurality of the outdoor casing structures;
A panel mounting structure, wherein a plurality of the outdoor casing structures are mounted on the shelf.

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