JPH10318566A - Heating and cooling apparatus for outdoor electric facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a lifetime of an electric equipment in a case by providing an electronic heater/cooler via the case, arranging inside and outside fins on both surfaces of a Peltier element in the heater/cooler, and switching polarity of a DC voltage to the element to cool or heat the inside fins. SOLUTION: When a sensing temperature of a sensor 48 is a predetermined high temperature or higher, a positive DC voltage is supplied to a Peltier element of an electronic heater/cooler 49 by a power source to cool inside fins to absorb heat, the heat is radiated from outside fins, the air of a closed chamber 39 is sucked from a suction hole of the cover via the inside fins, cooled by the inside fins, returned from an exhaust hole to the chamber 39 to cool the chamber 39. Meanwhile, when the sensing temperature of the sensor 48 is a predetermined low temperature or lower, a reverse voltage is applied to the element to cool the outside fins to absorb heat, and the heat is radiated from the inside fins. And, the air sucked from a suction hole by an inside fan is warmed, the air is returned from the exhaust hole to the chamber 39 to heat the chamber 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-performance electric device used for optical communication, power distribution, control, etc., which cools or heats a box installed outdoors according to the temperature of the outside air. The present invention relates to a cooling / heating device for outdoor electric equipment for extending the life.

[0002]

2. Description of the Related Art In general, electric equipment used for optical communication, power distribution, control, and the like is housed in a box of outdoor electric / communication equipment installed outdoors. This electric equipment is susceptible to high and low temperatures. Because the guaranteed upper temperature limit of the high temperature is low, measures must be taken to prevent the inside of the box from becoming too hot due to strong direct sunlight in the summer. Low temperature measures are required.

On the other hand, as shown in FIG. 11, which shows the relationship between the amount of water in the air and the temperature and relative humidity, the amount of water in the air is small at low temperatures, but increases as the temperature increases. In a humid environment, metal tends to rust, and the insulation properties of electrical equipment are greatly reduced. Therefore, in an environment of high temperature and high humidity, it is necessary to take measures against dew condensation and insulation deterioration in addition to measures against high temperature.

In cold regions such as Hokkaido,
Since the temperature in winter falls below the freezing point, measures against low temperatures are especially important.

[0005] Next, a conventional outdoor electric equipment for taking measures against high temperature, dew condensation and low temperature will be described with reference to FIG.
This will be described with reference to 3A, B, and C.

First, in the outdoor electric equipment shown in FIG. 13A, a space heater 2 is provided at the bottom of an outdoor type box 1 in which electric equipment (not shown) is housed, and a door 3 on a front surface of the box 1 is provided. Ventilation holes 5 are formed in the upper and lower portions of the back plate 4 of the box 1, respectively, and an outer ceiling plate 8 is provided above the inner ceiling plate 6 of the box 1 via an air layer 7.

[0007] The outer ceiling plate 8 and the air layer 7 block the heat due to direct sunlight, and the air flowing from the ventilation port 5 below the door 3 or the back plate 4 allows the air flowing into the door 3 or the back plate 4 by natural convection. It flows out from the upper ventilation port 5 to prevent the temperature inside the box 1 from rising.

When the humidity is high, the space heater 2 is operated to increase the temperature inside the box 1 in addition to the ventilation inside the box 1 through the ventilation port 5.

As shown by a broken line arrow in FIG. 12 showing the relationship between the absolute humidity, the relative humidity, and the temperature, the relative humidity is increased by 90% from t ₁ to t ₂ , for example.
% To 80%, and measures are taken against dew condensation on electric devices. When the temperature is low, the space heater 2
This raises the temperature inside the box 1.

Next, the outdoor electric equipment shown in FIG.
A space heater 2 is provided at the bottom of the box 1, and an electronic dehumidifier 9 is provided within the box 1.

The electronic dehumidifier 9 will be described in detail. Reference numeral 10 denotes a vertically long storage case having a U-shaped cutting plane with an open front surface, 11 a back plate of the case 10, 12 a joint base formed by bulging forward and downward at a lower portion of the back plate 11, and 13 a back plate. Radiation fins 14 are integrally formed on the upper part of the back plate 11 so as to be directed forward.
2, a heat conductor to which the radiation fins 13 are connected.

Reference numeral 15 denotes a top plate of the case 10, and 16 denotes a top plate.
Are water receiving portions formed at the bottom of the case 10, and the top plate 15, the water receiving portion 17, and the left and right side plates are integrally formed on the back plate 11. 18 is the water receiving part 1
Reference numeral 19 denotes a drain port, reference numeral 19 denotes a drain hose connected to the drain port 18, reference numeral 20 denotes a cover plate that closes an opening on the front surface of the case 10, and reference numeral 21 denotes an intake port formed at a lower portion of the cover plate 20.

Reference numeral 22 denotes a Peltier element having a heat radiating surface joined to the joining table 12, and 23 denotes a cooling fin mounted on a cooling surface of the element 22, which is located below the heat radiating fin 13 and in the water receiving portion 1.
7. Reference numeral 24 denotes a power supply device provided above the radiating fins 13 and converts a commercial AC into a DC of a predetermined voltage. Reference numeral 25 denotes a ventilation fan provided above the power supply device 24, which is located below the exhaust port 16 of the top board 15.

Then, a DC voltage is supplied to the element 22 from the power supply 24, and the cooling fins 23 are cooled and absorb heat,
The heat is radiated from the radiating fins 13 via the joining table 12 and the heat conductor 14, and the air flowing from the air inlet 21 of the cover plate 20 is cooled by the cooling fins 23 by driving the fan 25, and the water vapor in the air is cooled by the cooling fins 23. The condensed water is condensed and condensed, and the condensed water is discharged from the drain port 18 of the water receiving portion 17 through the drain hose 19, and the air dehumidified by the cooling fins 23 is warmed by the radiating fins 13 and cooled by the fan 25. The humid air discharged from the exhaust port 16 of the plate 15 is dehumidified.

The electronic dehumidifier 9 removes the moisture in the air in the box 1 and reduces the relative humidity from X ₁ to X ₂ to reduce the relative humidity, as shown by the solid arrow in FIG. Has been dehumidified.

When the temperature is low, the electronic dehumidifier 9 and the space heater 2 are operated in combination to warm the inside of the box 1 and dehumidify.

Next, the outdoor electric equipment shown in FIG.
In addition to the space heater 2, an electronic cooler 26 using a Peltier element 22 is provided above the back plate 4 of the box 1, and the cooling fins 23 of the electronic cooler 26 are located in the box 1, Is located outside the box 1 and is exposed to the outside air.

[0018]

In each of the above-mentioned conventional outdoor electric facilities, since the space heater 2 is used, a large installation space for ensuring the safety of the space heater 2 is provided in the box 1. Required, the equipment becomes large, and the arrangement of electrical equipment is limited.

Further, by using the space heater 2, there is a high risk of causing a fire or an accident, safety is reduced, and the surface temperature of the space heater 2 is high.
The wall surface of the box 1 near the space heater 2 becomes black and the appearance is impaired, and the space heater 2 consumes a large amount of power and increases its cost.

On the other hand, in the apparatus shown in FIG. 13A, since outside air flows in from the ventilation port 5, in a place near the sea, a place with a lot of dust, and a place with a lot of gas, salt damage, damage by dust, and gas damage to the electric equipment. And cannot cope under these adverse environments.

The present invention has been made in consideration of the above points,
An electronic air conditioner is used to prevent dew condensation, insulation deterioration, and low temperature, eliminating the need for space heaters, effectively utilizing the space inside the box, miniaturizing equipment, ensuring the reliability of electrical equipment, and ensuring safety and safety. An object of the present invention is to provide a cooling and heating device for outdoor electric equipment which can improve aesthetic appearance, realize energy saving and cost reduction, and can cope with a bad environment.

[0022]

According to a first aspect of the present invention, there is provided a cooling / heating device for outdoor electric equipment, which is installed outdoors, a heat insulating material is mounted on an inner surface, and a closed chamber is formed. A box body, an outer ceiling plate covering the box body and provided on an inner ceiling plate of the box body with an air layer interposed therebetween, a heat insulating material mounted on an inner surface of the outer ceiling plate, and the closed chamber. An electric device used for optical communication, power distribution, control, and the like housed in the box, an electronic cooler / heater provided through the box, and connected to one surface of a Peltier element in the electronic cooler / heater. An inner fin that is located, an outer fin that is connected to the other surface of the element and that is located outside the box, a power supply that supplies a DC voltage to the element, and that switches the polarity of the DC voltage to the element. , A polarity switcher for cooling or heating the inner fin. That.

Therefore, the heat of the direct sunlight in summer can be blocked by the outer ceiling plate provided through the heat insulating material and the air layer.

Then, at high temperature and high humidity, heat is radiated from the outer fins by cooling the inner fins of the air conditioner body,
The temperature of the closed chamber, which has risen due to the heat generated by the electric device, can be reduced and dehumidified by the inner fins.

When the temperature is low, a current is applied to the element in the reverse direction by the polarity switch to heat the inner fins, cool the outer fins, and adjust the temperature of the closed chamber by the heat generated by the electric equipment and the heating of the inner fins. Can be raised. That is,
High-temperature countermeasures, dew condensation countermeasures, insulation deterioration countermeasures,
Low temperature measures can be taken.

Since a space heater is not required, a large installation space for ensuring safety is not required, the arrangement of electric devices is not limited, and the space in the box can be effectively used. Becomes smaller.

In addition, the electronic air conditioner removes moisture in the air in the closed chamber to lower the absolute humidity, and lowers the relative humidity.
As compared with the space heater, the effect of preventing dew condensation and insulation reduction is great, and the life of the electric device is prolonged, and the reliability is improved.

In addition, since the electronic cooler / heater uses the Peltier effect of the Peltier element, it consumes less power than the space heater, is more economical, and is suitable for energy saving.

Furthermore, since the surface temperature is lower than that of the space heater, there is no danger of causing a fire or an accident, the safety is high, and the wall surface inside the box due to the surface temperature can be prevented, and the appearance is improved.

In addition, since the electric equipment is housed in the closed chamber, it can cope with a bad environment due to salt damage, dust damage, gas damage and the like.

According to a second aspect of the present invention, the outer fin according to the first aspect is covered with a cover having both side edges fixed to a back plate, and ventilation holes are formed on the upper and lower surfaces of the cover. Therefore, the device can be easily configured.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In one embodiment, first of all, the entire structure is shown in front views of FIGS. 1A and 1A, a rear view of a part of FIGS. IIa-IIa of 3B
2A of the line cut front view, FIG. 3B of the rear view cut along the line IIb-IIb of FIG. 3B, and FIG. 3 of the line IIIa-IIIa cut of FIG. 3B.
A, description will be made with reference to FIG. 3B, which is a right side view cut along the line IIIb-IIIb in FIG. 3A.

In these figures, reference numeral 27 denotes a stand, which is a flat base 28 which is directly installed on a road surface or the like.
A cylindrical body 29 having a base fixed to the center of the base 28;
An opening 31 communicating with the hollow portion of the cylindrical body 29 is formed in the support base 30 or the base 28, which comprises a flat support 30 fixed to the distal end of the cylindrical body 29.

Numeral 32 denotes a box, which is composed of a bottom plate 33 and both side plates 3
4, an inner ceiling plate 35 and a back plate 36, the front surface of which is opened, and the bottom plate 33 mounted on the support 30 of the stand 27. Reference numeral 37 denotes a through hole formed in the bottom plate 33 and communicates with the opening 31 of the support 30. 38 is a box 32
An annular contact member protruding from a peripheral edge of the front opening of the box 32, a closed chamber 39 formed in the box 32, a door 40 for closing the front opening of the box 32 so that it can be opened and closed, and 41 a door 40 A bent piece 42 formed by being bent inward on the peripheral edge of the door 40 is an annular packing mounted on the peripheral edge of the inner surface of the door 40, and abuts against the end face of the contact body 38, Bent piece 41 on the outer surface of
Are in contact with each other to seal the closed chamber 39. Reference numeral 43 denotes a heat insulating material, which is attached to the inner surface of the closed chamber 39 and the inner surface of the door 40 except for the peripheral portion.

Reference numeral 44 denotes a flexible cover plate which closes the through hole 37 of the bottom plate 33, reference numeral 45 denotes an insertion hole formed in the cover plate 44, and reference numeral 46 denotes a vertically long L-shaped cross-section fixed to the inner surface of both side plates 34. The bracket 47 is attached to both mounting brackets 46 on both sides.
An electrical device such as an optical transmission device used for optical communication, 48 is a temperature sensor provided at the front of the inner surface of the left side plate 34,
It is located in front of the electric device 47 and detects the temperature of the closed chamber 39. Reference numeral 49 denotes an electronic cooler / heater provided to penetrate the back plate 36. A cable (not shown) connected to the electronic cooler / heater 49, the electric device 47, and the like is provided in a hollow portion of the stand 27 and a through hole of the bottom plate 33. 37, through the insertion hole 45 of the cover plate 44, is introduced into the sealed chamber 39, the putty is applied to the insertion hole 45 around the cable, and the cable is hermetically inserted into the insertion hole 45.

Reference numeral 50 denotes a cover having a U-shaped cut plane, which comprises a base 51 parallel to the back plate 36 and both side edges 52 bent forward, and both side edges 52 are fixed to the back plate 36. The cover 50 covers the rear part of the electronic cooler / warmer 49. Reference numeral 53 denotes an opening formed in the base 51 of the cover 50, which is located behind the electronic cooler / heater 49. The size of the opening 53 is such that the electronic cooler / heater 49 can be taken out.

Reference numeral 54 denotes two hinges, and reference numeral 55 denotes a door for inspection and replacement supported on the base portion 51 of the cover 50 by the hinge 54, and the opening 53 is closed so as to be openable and closable. Reference numeral 56 denotes an inflow ventilation hole formed in the door 55, and reference numeral 57 denotes an outflow ventilation hole formed on the upper and lower surfaces of the cover 50.

Reference numeral 58 denotes two rain shields, the bases of which are mounted on the upper edge of the front surface of the box 32 and the rear end of the inner ceiling plate 35, and the tips of which are inclined outward. Reference numeral 59 denotes a U-shaped support plate fixed to the front and rear portions of the inner ceiling plate 35,
Numeral 60 denotes an outer ceiling plate provided above the box 32 and the cover 50 via an air layer 61. The front and rear portions are supported by both support plates 59, and the peripheral edge is bent downward. 32 and the cover 50, the front end and the rear end are located outside the rain shields 58, the front is high, the rear is inclined low, and the heat insulating material 43 is attached to the inner surface of the outer ceiling plate 60. Have been.

Next, regarding the structure of the electronic heater / cooler 49, FIGS. 4A and 4B of a front view and its plan view, a rear view and its Vb
5A and 5B of a right side view cut along the line Vb, a front view with a part removed, and FIGS. 6A and B of a plan view cut along the line VIb-VIb, and FIG. 7 of a schematic exploded perspective view of a part thereof. explain.

In these figures, reference numeral 62 denotes an upright and leftward connecting plate, 63 and 64 denote upper and lower plates formed by bending the upper and lower ends of the connecting plate 62 rearward, and 65 denotes a connecting plate. A through hole formed in the center of the plate 62; 66, an opening formed on both sides of the connecting plate 62; 67, a ventilation opening formed of a plurality of long holes 68 formed in the center of the upper plate 63 and the lower plate 64; 69
Numerals are ventilation holes formed on both sides of the ventilation opening 67, and 70 are insertion holes formed in each corner of the connecting plate 62, the rear corner of the upper plate 63 and the lower plate 64.

Reference numeral 71 denotes a plate-like heat insulating material, 72 denotes an opening formed at the center of the heat insulating material 71, 73 denotes a plurality of through holes formed on both sides of the heat insulating material 71 in the vertical direction, and 74 denotes each of the holes. A Peltier element provided in the through hole 73, the front surface of the heat insulating material 71 abuts against the back surface of the connecting plate 62, each element 74 is located in the opening 66 on both sides of the connecting plate 62, and the through hole 65 of the connecting plate 62 The opening 72 of the heat insulating material 71 communicates with the opening.

Reference numeral 75 denotes outer fins abutting on both sides of the back surface of the heat insulating material 71; 76, a base plate in front of the outer fins 75; 77, an inner plate integrally formed inside the back surface of the base plate 76; Reference numeral 78 denotes an outer plate which is integrally formed outside the back surface of the base plate 76 and is longer than the inner plate 77. Reference numeral 79 denotes a plurality of outer plates integrally formed between the side plates 77 and 78 on the back surface of the base plate 76. The fin plates 80 are cutouts formed substantially at the center and lower part of each outer fin plate 79.

Reference numeral 81 denotes a support piece protruding substantially at the center of the inner surfaces of the both side plates 77 and 78, and reference numeral 82 denotes an outer fan fixed to both support pieces 81, which is located in the notch 80 at the center. Reference numeral 83 denotes a bent piece formed by bending the tip of the inner plate 77, and reference numeral 84 denotes two vertical grooves formed before and after the inner surface of the tip of the outer plate 78.

85 is an inner fin, 86 is an inner fin 85
The rear base plate 87 is a plurality of vertical inner fin plates integrally formed on the front surface of the base plate 86, and the base plate 8 of the inner fin 85 is provided on both sides of the front surface of the heat insulating material 71.
6, the inner fin 85, the heat insulating material 71, and the outer fin 75 are integrally mounted by bolts.
The rear surface of the base plate 86 of the inner fin 85 is connected to the cooling surface of each element 74 on the front surface of the first fin 1, and the base plate 7 of the outer fin 75 is
6 are connected.

Then, both inner fins 85 are inserted into the openings 66 on both sides of the connecting plate 62 from the rear to the front.
The front surface of the heat insulating material 71 is in contact with the rear surface of the outer fin plate 79.
The upper and lower surfaces of the upper plate 63 and the lower plate 64 abut against the lower surfaces of the upper plate 63 and the lower plate 64, respectively, and are located below the ventilation holes 69 of the upper plate 63 and the lower plate 64.

Reference numeral 88 denotes a plurality of bolts,
2, inserted into the through holes 70 of the upper plate 63 and the lower plate 64 and screwed into the screw holes of the outer plate 78 of the outer fins 75 and the base plate 76; The two outer fins 75 are fixed via the.

Reference numeral 89 denotes a screw 9 on the upper front surface of the inner fin 87.
0, which circulates the cooling air of the inner fins 85. Reference numeral 91 denotes a water receiver for condensed water provided below the inner fin 85, 92 denotes a pipe having one end connected to the water receiver 91, and 93 denotes a frame body made of a heat insulator attached to a peripheral portion of a front surface of the heat insulator 71. And comes into contact with the outer surface of the back plate 36 of the box 32.

Numeral 94 denotes a mounting plate having a transformer 95 fixed to the inner surface, the outer surface of which is mounted on the upper portion of the outer surface of the inner plate 77 of one of the outer fins 75 (the right side when viewed from the front, the left side in FIG. 6). . Reference numeral 96 denotes a printed circuit board provided below the transformer 95 in the front-rear direction, 97 and 98 denote capacitors and fuses fixed to the front surface of the substrate 96 by two by soldering, and 99 denotes two capacitors fixed to the back surface of the substrate 96. 100 is a screw in which both stacks 99 are mounted below the inner plate 77 of one of the outer fins 75, and 101 is a power supply device comprising a transformer 95, a capacitor 97, a fuse 98, a rectifying stack 99, and the like.

Reference numeral 102 denotes a cover which covers both the inner fins 85, and reference numeral 103 denotes a mounting piece which is formed by bending both sides of the cover 102 outward, and a bolt 88 which penetrates the mounting piece 103 and the heat insulating material 71. Cover 1 on connecting plate 62
02 is mounted, and the frame 93 is located outside the entire periphery of the cover 102. 104 is an intake hole formed of a plurality of slits formed on both sides of the upper portion of the front plate of the cover 102; 105 is an exhaust hole formed of a plurality of slits formed in the left and right direction below both the intake holes 104; These are two vertical ridges projecting in parallel to the inner surface of the cover 102.

Reference numeral 107 denotes a square trough-shaped partition plate made of an insulating synthetic resin, which is positioned vertically, and a base 108 is press-fitted between the two ridges 106 to be supported. The tip of the bent piece 109 is connected to the connecting plate 62.
Is in contact with the front of the

Reference numeral 110 denotes a cover plate attached to the inner plate 77 of the outer fins 75 with screws, and covers the outer fan 82 and the power supply device 101. Reference numeral 111 denotes a large number of punching holes formed on almost the entire surface of the cover plate 110; 112, a porous evaporating plate made of polyester or the like; The pipe 9 is located vertically below the long groove 84.
2 penetrates the lower part of the cover plate 110, the other end of the pipe 92 is press-fitted into the evaporator plate 112 and is located at substantially the center in the thickness direction of the evaporator plate 112, and condensed water from the water receiver 91 passes through the pipe 92. And flows into the evaporation plate 112.

Reference numeral 113 denotes a filter having both side edges inserted into the inner long groove 84, and the lower surface thereof is in contact with the upper surface of the evaporating plate 112. Reference numeral 114 denotes a rear plate having both side edges inserted into the outer long grooves 84, and reference numeral 115 denotes a plurality of ventilation holes formed in the rear plate 114.

Next, the circuit configuration of the electronic cooler / heater 49 will be described with reference to FIG. In the figure, 116 is a commercial AC power supply, 117 is a high-temperature contact whose one end is connected to one end of the AC power supply 116 via a fuse 98, 118
Is a low-temperature contact. When the temperature detected by the temperature sensor 48 is equal to or higher than a predetermined high temperature, the high-temperature contact 117 is turned on. When the detected temperature is equal to or lower than a predetermined low temperature, the low-temperature contact 118 is turned on. 119
Is a coil of the relay, and the coil 119 and the low-temperature contact 1
One end of the series circuit 18 is connected to one end of the high-temperature contact 117, and the other end is connected to the other end of the AC power supply 116.

Reference numeral 120 denotes an auxiliary contact of the relay, both ends of which are connected to both ends of a high-temperature contact 117, and a coil 119.
Is turned on by excitation of. Both ends of the primary winding of the transformer 95 are connected to the other end of the high-temperature contact 117 and the AC power supply 116.
, The two input terminals of the rectifier stack 99 are connected to the secondary winding of the transformer 95, and both ends of the capacitor 97 are connected to the positive and negative output terminals of the rectifier stack 99.

Reference numeral 121 denotes two common terminals connected to both ends of the capacitor 97, and reference numeral 122 denotes switching pieces connected to both the common terminals 121, respectively, which are switched by exciting the coil 119.

Reference numeral 123 denotes two positive terminals connected to both ends of the element 74, and reference numeral 124 denotes a reverse terminal arranged in parallel with both positive terminals 123. The upper reverse terminal 124 is connected to the lower positive terminal 123. The lower terminal 124 is connected to the upper positive terminal 123, the switching pieces 122 contact the respective positive terminals 123, and contact the opposite terminals 124 by exciting the coil 119. Reference numeral 125 denotes a polarity switch including a high-temperature contact 117, a low-temperature contact 118, a coil 119, an auxiliary contact 120, and both switching pieces 122.

Next, the operation will be described. First, when the temperature detected by the sensor 48 is equal to or higher than a predetermined high temperature, the high-temperature contact 117 is turned on, the two switching pieces 122 are connected to the two positive terminals 123, and the DC voltage in the positive direction from the power supply 101 is applied to each element 74. Is supplied, the inner fins 85 are cooled and absorb heat,
The heat is radiated from the outer fins 75, and by the inner fan 89,
The air in the closed chamber 39 is sucked from the intake hole 104 of the cover 102, cooled by the inner fins 85, exhausted from the exhaust hole 105 to the closed chamber 39, and the closed chamber 39 is cooled.

At this time, the moisture of the air is
Condensed and condensed on the inner fin 8
The dew water condensed on 5 flows into the evaporating plate 112 from the water receiver 91 via the pipe 92.

On the other hand, outside air flowing from the ventilation hole 56 of the door 55 by the outside fan 82
5, the outside air flows into the outer fins 75 through the filter 113 and the cover plate 110, and
5 is evacuated from above and below, and the outer fins 75 dissipate heat,
The upward radiating air passes through the ventilation port 57 from the ventilation port 69 of the upper plate 63, is exhausted to the outside through the inside of the outer ceiling plate 60, and the radiating air to the lower side condenses water of the evaporating plate 112. While evaporating, it is exhausted from the ventilation port 69 of the lower plate 64 to the outside through the ventilation port 57.

For example, as shown in FIG. 9, when the outside air temperature is 40 ° C. indicated by a one-dot chain line, the temperature of the closed chamber 39 is considered to rise to about 60 ° C. indicated by the solid line due to heat generation of the electric equipment 47. Then, the heat of the closed chamber 39 raised by the heat generation of the electric device 47 is cooled by the electronic cooler / warmer 49, and the closed chamber 3 is cooled.
The temperature of 9 is reduced to the outside air temperature.

As described above, at the time of high temperature and high humidity, the countermeasure against the high temperature and the dew condensation of the electric equipment 47 whose guaranteed upper limit temperature is low is performed.

Next, when the temperature detected by the sensor 48 is equal to or lower than a predetermined low temperature, the low-temperature contact 118 is turned on, the coil 119 of the relay is excited, and the switching piece 122 is switched from the normal terminal 123 to the reverse terminal 124. A voltage in the opposite direction is applied to each element 74, the outer fin 75 is cooled and absorbs heat, the heat is radiated from the inner fin 85, and the air sucked from the intake hole 104 by the inner fan 89 is warmed. The air is exhausted from the exhaust hole 105 to the closed chamber 39, and the closed chamber 39 is heated.

For example, as shown in FIG. 9, when the outside air temperature is −40 ° C. indicated by a two-dot chain line, the temperature of the closed chamber 39 is about −20 ° C. indicated by a broken line due to heat generation of the electric device 47. It is considered that the temperature of the closed chamber 39 is increased by the electronic cooler / warmer 49 in addition to the heat generation of the electric device 47,
To ℃.

In this case, freezing of the condensed water on the outer fins 75 is considered. However, as shown in FIG. 11, the water content in the air is smaller as the temperature is lower. It is thought that there is no freezing.

As described above, the low-temperature countermeasures for the electric equipment 47 having a high guaranteed lower-limit temperature at low temperatures are taken.

Accordingly, a single electronic cooler / heater 49 takes measures against high temperature, dew condensation, and low temperature of the electric equipment 47.

In the above-described embodiment, the switching of the switch 125 is automatically performed based on the temperature detected by the temperature sensor 48. However, the switching may be performed manually.

When the electronic air conditioner 49 is inspected or replaced, the door 55 of the cover 50 is opened, and the inspection is performed through the opening 53.

In the above-described embodiment, the box 32 is mounted on the stand 27 directly installed on a road or the like. However, as shown in FIG. It may be mounted on a hollow column 127. In this case, two connecting pipes 128 protruding from the peripheral surface of the column 127 are provided.
And the flange 131 of the connecting pipe 130 projecting from the side plate 34 of the box 32,
2, the two flanges 129 and 131 may be connected.

In the above-described embodiment, the intake hole 104 and the exhaust hole 105 of the cover 102 of the electronic heater / cooler 49 are slits, but may be punched holes.

The electric device 47 of the above-described embodiment may be an electric device used for power distribution, control, etc., in addition to an electric device used for optical communication.

[0072]

Since the present invention is configured as described above, it has the following effects. The cooling / heating device for outdoor electric equipment according to the present invention includes an outer ceiling panel 60 provided on an inner ceiling panel 35 of a box 32 installed outdoors via an air layer 61, and the outer panel 60 covers the box 32. Box 32
The heat insulating material 43 is attached to the inner surface of the
An electric device 47 used for optical communication, power distribution, control, and the like is housed in a closed chamber 39 formed in the box 32, and an electronic cooler / heater 49 is provided through the box 32, and a Peltier element 74 in the electronic cooler / heater 49 is provided. The inner fin 85 connected to one side of the
And the outer fin 7 connected to the other surface of the element 74
5 is positioned outside the box 32, and the polarity switch 125 switches the polarity of the DC voltage of the power supply 101 supplied to the element 74 to cool or heat the inner fin 85. The outer ceiling plate 60 provided through the air layer 61 can block the heat of strong direct sunlight in summer, and also cools the inner fins 85 of the electronic cooler / heater 49 at high temperature and high humidity, so that the outside fins 85 are cooled. Heat is radiated from the fins 75, and the temperature of the sealed chamber 39, which has been increased by the heat generated by the electric device 47, can be reduced by the inner fins 85 to dehumidify.

When the temperature is low, a current is supplied to the element 74 in the reverse direction by the polarity switch 125 to heat the inner fin 85 and cool the outer fin 75, so that the temperature of the sealed chamber 39 is reduced by the heat generation of the electric equipment 47. The temperature can be raised by heating the inner fin 85, and the electronic cooler / heater 49 can take measures against high temperature, dew condensation, insulation reduction, and low temperature.

Since a space heater is not required, a large installation space for ensuring safety is not required, the arrangement of the electric equipment 47 is not restricted, and the space in the box 32 can be effectively utilized. And the equipment becomes smaller.

Since the electronic cooler / heater 49 removes moisture in the air in the closed chamber 39 to lower the absolute humidity and lower the relative humidity, the effect of preventing dew condensation and insulation from lowering is greater than that of the space heater. , The life of the electric device 47 is extended,
Reliability is improved.

Further, since the electronic cooler / heater 49 utilizes the Peltier effect of the Peltier element 74, it consumes less power than the space heater, is more economical, and is suitable for energy saving.

Further, since the surface temperature is lower than that of the space heater, there is no danger of causing a fire or an accident, the safety is high, and the appearance of the wall surface of the box 32 due to the surface temperature is not impaired.

In addition, since the electric equipment 47 is housed in the closed chamber 39, it can cope with a bad environment due to salt damage, dust damage, gas damage and the like.

[Brief description of the drawings]

1A is a front view of an embodiment of the present invention, B is a rear view of a part of A, and C is a right side view of a part of A. FIG.

2A is a sectional front view taken along line IIa-IIa of FIG. 3B, showing a cross section of FIG. 1C, and FIG. 2B is a rear view taken along line IIb-IIb of FIG. 3B.

3A is a plan view cut along the line IIIa-IIIa of FIG. 3B, and FIG. 3B is a right side view cut along the line IIIb-IIIb of FIG. 3A.

4A is a front view of the electronic cooler / heater of FIG. 3A, and FIG. 4B is a plan view of A.

5A is a rear view of the electronic air conditioner, and FIG. 5B is Vb-Vb of A.
It is a line cutting right view.

FIG. 6A is a view in which a part of the electronic air conditioner is removed, and FIG.
FIG. 6 is a plan view cut along the line VIb-VIb.

FIG. 7 is a schematic exploded perspective view of a part of the electronic air conditioner;

FIG. 8 is a circuit diagram of an electronic cooler / warmer.

FIG. 9 is a diagram illustrating the operation of the electronic air conditioner.

FIG. 10 is a front view of another embodiment of the present invention.

FIG. 11 is a diagram showing the relationship between the amount of water in air, temperature, and relative humidity.

FIG. 12 is a diagram showing a relationship between absolute humidity, relative humidity, and temperature.

13A is a cut right side view of a conventional example, B is a cut right side view of another conventional example, and C is a cut right side view of still another conventional example.

[Explanation of symbols]

 32 Box 35 Inner ceiling plate 36 Back plate 39 Sealed room 43 Insulation material 47 Electrical equipment 49 Electronic cooler / heater 50 Cover 52 Both side edges 57 Ventilation opening 60 Outer ceiling plate 61 Air layer 74 Peltier element 75 Outer fin 85 Inner fin 101 Power supply Device 125 Polarity switch

Claims (2)

[Claims] 1. A box body which is installed outdoors, a heat insulating material is attached to an inner surface thereof, and a closed chamber is formed. The box body covers the box body, and is provided on an inner ceiling plate of the box body via an air layer. An outer ceiling plate, a heat insulating material attached to the inner surface of the outer ceiling plate, electrical equipment housed in the closed room for optical communication, power distribution, control, and the like, and an electronic device provided through the box body A cooling / heating device, an inner fin connected to one surface of the Peltier device in the electronic heating / cooling device and positioned in the closed chamber, and an outer fin connected to the other surface of the device and positioned outside the box. A cooling / heating device for outdoor electric equipment, comprising: a power supply device for supplying a DC voltage to the element; and a polarity switching device for switching the polarity of the DC voltage to the element and cooling or heating the inner fin. 2. A box which is installed outdoors, a heat insulating material is attached to an inner surface thereof, and a closed chamber is formed; an electric device housed in the closed chamber for optical communication, power distribution, control, and the like; An electronic air conditioner provided through the back plate of the body, an inner fin connected to one surface of the Peltier element in the electronic air heater and located in the closed chamber, and connected to the other surface of the element; An outer fin located outside the back plate, a cover covering the outer fin, having both side edges fixed to the back plate, and having ventilation holes formed on upper and lower surfaces, and above the box and the cover An outer ceiling panel provided through an air layer, a heat insulating material attached to an inner surface of the outer ceiling panel, a power supply for supplying a DC voltage to the element, and a polarity of the DC voltage to the element. And a polarity switch for cooling or heating the inner fin. A cooling and heating device for outdoor electric equipment, comprising: