JP3578228B2 - Communication equipment cabinet - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor or indoor installation cabinet for installing a communication device such as a remote multiplex transmission device (RT) used at a relay point of a communication wiring cable of a telegraph telephone.
[0002]
[Prior art]
In general, most equipment such as telecommunications equipment is used in a case where a control panel or a relay device for operation, control, monitoring, etc. is installed outdoors or indoors in a housing.
However, in this outdoor installation type, the control panel and other telecommunications equipment in the housing are not affected by various atmospheres with regional differences, seasonal differences, and severe environmental conditions such as wind, rain, solar radiation, and dust. Must be able to withstand sufficient use.
In addition, recent electrical components of control devices are being converted into transistors, ICPs, and units, and the performance is remarkably changed due to a rise in temperature in a housing. In addition, humidity and dust are extremely reduced. At present, it is difficult to take measures against temperature rise and waterproofing, insect repelling, and dustproofing, and it is known that there is a problem in the structure of a housing to be stored.
[0003]
[Problems to be solved by the invention]
In a conventional cabinet, if it has a closed structure, the heat generated inside the housing cannot be dissipated, and it does not take measures to prevent temperature rise against solar radiation, and if it has a ventilation structure, it cannot respond to environmental conditions, In addition to preventing insects and dust, it is also possible to add a cooling cooler, a blower fan or a heater, etc., and use an air-conditioning type such as a forced circulation system in order to make the temperature control structure. However, the structure becomes complicated and extremely expensive. In addition, there was a problem that the maintenance and security of the air conditioning equipment was troublesome and unsatisfactory in terms of safety and reliability, requiring maintenance and becoming impractical.
SUMMARY OF THE INVENTION The present invention is intended to eliminate these conventional drawbacks. In addition to preventing solar heat from being received and preventing a temperature rise in a cabinet for a telecommunications facility, a simple structure of a non-air-conditioning natural air-cooling type is used. An object of the present invention is to reduce the labor and cost of designing and manufacturing cabinets having a structure that can be insect-proof and dust-proof and have high safety for outdoor installation or indoor installation.
[0004]
[Means for Solving the Problems]
The present invention is characterized in that the closed casing includes a top plate, an outer plate having a louver for ventilation, and an opening / closing door, which are spaced from each other on the outer periphery of the closed casing including a top wall, a side wall, and a bottom wall. A plurality of thermal convection guide plates are provided corresponding to the power supply unit disposed inside the body, the multiplex transmission device unit and the setting unit, and the top wall is vertically arranged between the multiplex transmission device unit and the setting unit and the mounting device unit. And a heat shield plate provided apart from the side wall and the bottom wall.
[0005]
[Action]
As an outdoor installation type enclosure, it has a double wall structure with an enclosure with an outer enclosure to reduce solar radiation in order to make effective use of heat convection and heat dissipation inside the enclosure to maintain heat balance. Convection is generated in the airflow space between the inside and outside of the housing, preventing temperature rise on the wall of the housing, and using natural air cooling that can perform heat radiation and heat removal by ventilating from the louver of the outer housing. The hot air flow from the multiplex transmission device section installed in the closed casing collides against the top wall, a flow along the top wall is formed, and the multiplex transmission is performed as a downward flow while transferring heat to the wall material. The guide is guided by an induction plate so that heat convection does not enter the device part, and the heat is shielded by a heat shield plate, and the heat is efficiently radiated and radiated from the housing wall and the outer enclosure. The outer surface is easy to contact with the outside and the outside air flowing in the narrow space without increasing heat transfer. Released, the influence of the temperature rise is prevented accurately with respect to the sealed enclosure of telecommunications equipment.
[0006]
【Example】
An embodiment of the present invention will be described with reference to FIGS. 1 to 4 using an example of an outdoor installation cabinet of a telephone pole installation type. Referring to FIGS. 1 to 4, a space 13 is provided around the outer periphery of a closed housing 5 including a top wall 1, a side wall 2, and a bottom wall 3. And an outer plate 12 having a top plate 11 and a louver 10 for ventilation, and an opening / closing door 4 as outer enclosures, and a mounting device section A and a multiplex transmission equipment section B, B arranged in the closed casing 5. ₁ and the setting unit C, a plurality of heat convection guide plates of the short plate 6 and the long plate 7 are provided, and the multiplex transmission equipment units B and B ₁ and the vertical direction extending over the setting unit C and the mounting device unit A are arranged. Heat shield plates 8 and 9 are provided in the direction away from the top wall 1, the side wall 2 and the bottom wall 3 to provide a communication device cabinet.
[0007]
In this case, the thermal convection-induced plates, multiplex transmission equipment unit B, a short plate 6 which projects across the top wall 1 and side walls 2 toward the B _1, protruding from the top wall 1, upper It is made of a heat-insulating long plate 7, for example, a heat-insulating plastic plate, which extends from the multiplex transmission device section B and the setting section C so as to cover the upper part of the mounting device section A. There magnitude multiplex transmission equipment part B consisting of PKG board group, and guides that turning B _1, to facilitate heat dissipation. In addition, an appropriate space serving as an airflow passage is formed in the outer periphery of the closed casing 5 so as to reduce solar heat reception, and the outer periphery of the side plate 12 having the top plate 11 and the louver 10 and the opening / closing door 4 is substantially formed. It has a double wall structure to generate convection in the airflow space between the inside and outside of the closed casing 5 to prevent a temperature rise on the wall of the closed casing 5 and to allow ventilation from the louvers 10 of the outer plate 12. It has a natural air cooling structure that can perform heat radiation and heat removal.
[0008]
Also, the top plate 11 as the outer periphery is provided with a gap 13 on the top wall 1 of the closed casing 5 so that the roof plate provided with the mounting pieces 14 and the leg pieces 15 is configured to receive less solar heat. If necessary, the top plate 11 may be integrated with the outer plate 12 so as to cover the hermetically sealed housing 5, and for installation, the bottom wall 3 of the hermetically sealed housing 5 is bolted to the floor. Are provided on the rear side outer plate 12 with utility poles and brackets 17, 17 attached to the wall surface. These may be selectively used depending on the installation state, or one of them may be omitted and the floor may be omitted. It can be a type dedicated to surface installation and pole installation.
[0009]
In addition, a heat storage material, for example, disodium hydrogen phosphate (Na ₂ HPO ₄ .12H ₂ O) or calcium chloride hexahydrate (CaCl.6H ₂ O) is installed in the closed casing 5 to secure a low-temperature source. Or a radiating fin (not shown) can be provided.
As shown in FIG. 5, the door 4 is rotatably provided on the outer plate 12 via a hinge 18 as a front door, and the door 4 further includes a lock member 22 having a handle 21. For example, a rod is provided, and the rod is fitted into and disengaged from the closed casing 5 by operating a handle so that locking or unlocking can be performed. (FIG. 6)
[0010]
In addition, the short plate 6 and the long plate 7 of the heat convection induction plate and the side wall 2 in the closed casing 5, for example, a cabinet of 450 to 550 (W) × 350 to 420 (D) × 700 to 800 (H). The ventilation space between the heat shield plate 9 and the side wall 12 is about 10 to 15% (volume%). Is 3 to 10 cm, the internal temperature rise is reduced by 7 to 10 ° C. at an external temperature of 30 ° C. to 40 ° C. and the flow of the external air is at least 1 m / s. Is 70% or less at 50 W of internal heat generation and 60% or less at 100 W, and dew condensation is not observed at all. Further, by attaching a louver to the outer periphery, the internal temperature is reduced by 4 to 8 ° C.
Further, in the cabinet thermal conductivity, the total surface area S = 1.77, the total thermal conductivity ha = the total heat generation / the total surface area × the external heating, and the average maximum temperature difference between the temperatures inside the housing = 100 / 1.77 × 12. 4 = 4,556, and the thermal conductivity (h) = 3ha = 3 × 4,556 = 13.7 (W / m ² ° C).
[0011]
Further, in order to improve heat dissipation or heat removal efficiency, a heat transfer coefficient λ = 0.02 to 0.03 is used. For example, a thin plate or an acrylic paint obtained by coating an acrylic resin or a polyurethane resin on a zinc steel sheet is used. A baked steel plate, zinc-baked steel plate or stainless steel plate is used.
Incidentally, the multiplex transmission equipment unit B, the thickness of the boundary layer of the thermal convection are formed along the substrate B ₁ represents, becomes thicker heat flux surface of the substrate is small, PKG in 14.5～20Mm, mounting device Although it is about 12 mm at the part A, even if the temperature rise of the mounting device part A locally becomes a value close to 45 ° C., the hot air flow rising therefrom gradually diffuses and averages 14 ° C., and the flow velocity is about 57 cm / s. It becomes.
Accordingly, the local maximum temperature of the substrate is generated at the upper end portion of the case where the heating value of the PKG is 9 W, and becomes the surface maximum temperature ΔTmax of 26 ° C. However, the hot air flow is diffused as the temperature rises, and the temperature decreases to about 9 ° C. Since the temperature rise and the airflow velocity on the surface of the other PKG substrates are all smaller than 63 cm / s, the PKG having a calorific value of 9 W is arranged in a portion close to the front side plate and radiated to the outside through the front plate. The total amount of heat generated by the remaining PKG substrate is removed through the top wall and the left and right side walls, and the convection guide plate 6 protruding into the top wall is also used as one of the heat removal areas.
[0012]
In the examples of FIGS. 7 and 8, the cable is connected by opening the opening / closing door, the closed housing 5 having the same structure as the previous example is provided with the mounting portion 27 to the telephone pole P, and the ceiling is provided with a step and the fin is attached. The heat pipe 28 is penetrated so that one end is located inside the housing and the other end is located outside the housing. Further, the ascending passage of the air heated by the multiplex transmission equipment B and the air cooled by the heat pipe 28 An airflow guide 29 is provided to partition the air from the descending passage, so that convection of air is generated as a whole. That is, the air in the closed casing 5 is heated by the heat of the multiplex transmission device B and rises, contacts the heat pipe 28 on the ceiling and is deprived of heat, and the heat absorbed by the heat pipe 28 is The air that is sent to the outside of the body and is radiated into the atmosphere, while the heat deprived of the air descends and contacts the multiplex transmission device B again to cause natural convection.
In addition, heat shielding plates 47, 48, and 49 are appropriately disposed on the peripheral surface of the closed casing 5 to enhance the heat shielding function and the protective function.
[0013]
In the embodiment of FIGS. 9 to 12, a heat-radiating part composed of loop-type thin-tube heat pipes 30 and 31 in which a working fluid is sealed on the inner ceiling surface and both side surfaces is used for a small-capacity RT for a suspended hermetic type. The convection induction heat shield plate 32 and the guide plate 33 form a convection induction heat shielding plate 32 and a guide plate 33 to form a convection part ventilation space. The cabinet is divided into a compartment E and a mounting device A to form a cabinet having a double structure including a top wall 36 having a top plate 41 for shielding light, a side wall 38 and a bottom wall 39 having a louver 37, and an opening / closing lid 40. Hanging hooks 42 and anti-sway hooks 43 used to attach the power pole to the power pole are appropriately protruded from the top plate 41 and the side wall 38, and mounting bolts 44 for fixing to mounting brackets provided on the power pole are provided. It is provided.
[0014]
The heat pipes 30 and 31 are made of a copper tube having an inner diameter of 2 to 3 mm filled with a working fluid, for example, Freon having no chlorine group in the components, and used at a high heat receiving part temperature. And can withstand high internal pressure.
The thin tube heat pipes 30 and 31 penetrate the support plates 30 ₁ and 31 ₁ from one side to the other and hold them in a meandering manner. The heat radiation capacity can be adjusted only by increasing or decreasing the length or the number of meandering turns.
[0015]
In the examples of FIGS. 13 to 17, a PKG unit D is circulated and air-cooled by a fan system in which a fan unit 56 for forced air cooling is provided inside a housing 55, and the fan unit 56 is replaced with a cabinet. Fins may be attached to the inside and outside of both sides, and an open type with openings with filters on the ceiling and both sides may be provided. The housing 55 includes a full-face door 57 having light-shielding plates 57 ₁ , 58 ₁ and a back door 58, respectively. The mounting device 61 and the mounting device 62 provided at the bottom are partitioned by a thermal convection guide plate 63, and a circulating convection is generated in the PKG unit D to allow natural air cooling.
It is to be noted that the light shielding plate 64 is provided on the ceiling surface of the housing 55, the light shielding plate 65 with louvers is provided on the side surface, and the hanging hook 42 and the steady rest hook 43 are provided as in the previous example.
[0016]
【The invention's effect】
The present invention is characterized in that the closed casing includes a top plate, an outer plate having a louver for ventilation, and an opening / closing door, which are spaced from each other on the outer periphery of the closed casing including a top wall, a side wall, and a bottom wall. A plurality of short and long thermal convection guide plates are provided corresponding to the mounting device unit and the multiplex transmission device unit and the setting unit disposed in the body, and the multiplex transmission device unit and the setting unit and the mounting device unit. The heat shield from the multiplex transmission equipment installed in the sealed enclosure collides against the top wall by providing the heat shield plate at a distance from the top wall, the side wall, and the bottom wall. A flow along the wall is formed, and the heat is transferred to the inner wall and guided as a downward flow by a guide plate so that heat convection does not enter the multiplex transmission equipment section, and the heat is shielded by a heat shield plate, and the heat is blocked by the inner casing. Efficiently dissipates and radiates heat from walls and surroundings, and the outer surface of the housing is an outer , It is easily released to the outside without heat transfer enhancement, there is no adverse effect due to temperature rise on the telecommunications equipment in the case, preventing the temperature inside the sealed case from rising, and furthermore, there is less solar heat reception in the surroundings, Furthermore, since the inner case is sealed, it has waterproof, insect and dust proof effects, easy maintenance, simple configuration of natural air cooling type, high safety, and effective use of heat convection and heat dissipation to balance heat. And the reliability can be greatly improved.
[Brief description of the drawings]
FIG. 1 is a cut front view showing an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view taken along line II of FIG.
FIG. 3 is a vertical sectional view taken along line II-II in FIG. 2;
FIG. 4 is a front view of the example of FIG. 1;
FIG. 5 is an enlarged cross-sectional view of a part of the opening / closing door unit in the example of FIG.
FIGS. 6A and 6B are front views for explaining the operation of the lock portion of the opening / closing door in the example of FIG. 1, wherein a indicates a locked state and b indicates a released state.
7A is a longitudinal sectional view of another embodiment of the present invention, and FIG. 7B is a transverse sectional view taken along line III-III.
FIG. 8 is an enlarged vertical sectional view taken along line IV-IV of FIG. 7 (a).
FIG. 9 is a partially cut front view of another embodiment of the present invention.
FIG. 10 is a transverse sectional view taken along line aa of FIG. 9;
FIG. 11 is a longitudinal sectional view taken along line bb of FIG. 10;
FIG. 12 is an enlarged longitudinal sectional view of a part of the example of FIG. 11;
FIG. 13 is a partially cut front view of still another embodiment of the present invention.
FIG. 14 is a partially cut-away side view of the example of FIG.
FIG. 15 is a transverse sectional view taken along the line cc of FIG. 14;
FIG. 16 is a vertical sectional view taken along line dd of FIG. 15;
FIG. 17 is a transverse section taken along line ee in FIG. 16;
[Explanation of symbols]
Reference Signs List A Mounting device part B Multiple transmission equipment part B ₁ Multiple transmission equipment part C Setting part D PKG unit part 1 Top wall 2 Side wall 3 Bottom wall 4 Opening door 5 Closed casing 6 Short plate for heat convection induction 7 Length for heat convection induction Plate 8 heat shield plate 9 heat shield plate 10 louver 11 top plate 12 side plate 13 spacing 14 mounting piece 15 leg piece 16 gantry 17 bracket 18 hinge part 27 mounting part 28 heat pipe 29 air flow guide 30, 31 heat pipe 32 convection induction heat shield Plate 33 Guide plate 55 Housing

Claims (6)

A top plate, an outer plate having a louver for ventilation, and an opening / closing door are provided as outer surrounds at intervals on the outer periphery of the closed case including the top wall, the side walls, and the bottom wall, and are disposed in the closed case. A plurality of thermal convection guide plates are provided corresponding to the power supply section, the multiplex transmission equipment section and the setting section, and the top wall, the side wall, and the bottom in the vertical direction extending between the multiplex transmission equipment section, the setting section, and the mounting apparatus section. A cabinet for a communication device, wherein a heat shield plate is provided apart from a wall. The heat convection guide plate is a short plate protruding from the top wall and both side walls toward the multiplex transmission device portion, and a short plate protruding from the top wall and mounted downward from the upper multiplex transmission device portion and the setting portion. 2. The cabinet according to claim 1, comprising a heat-insulating long plate extending so as to cover an upper portion of the device section. The cabinet according to claim 1 or 2, wherein a top plate provided on the top wall of the closed casing with a gap is a roof member. 4. The cabinet according to claim 1, wherein the closed casing is provided with a heat radiating portion comprising a loop-type thin tube heat pipe filled with a working fluid on a ceiling surface and both side surfaces inside the closed housing. The closed casing includes a heat pipe having one end located inside the casing and the other end located outside the casing, and an ascending passage for air heated by a multiplex transmission device or the like in the casing and cooling from the heat pipe. The cabinet according to claim 1, 2, or 3, further comprising an airflow guide that partitions the air descending passage. The cabinet according to claim 2, 3, 4, or 5, wherein the closed casing includes a heat storage material therein.

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