JP2012220095A - Cooling device and heating element storage device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the degree of sealing in layering elements of a heat exchanger which sufficiently affects waterproof and dust prevention performance, concerning a heat exchange type cooling device and a heating element storage device using the same.SOLUTION: The heat exchanger 6 includes a body case 12 in which a first inlet port 8 and a first discharge port 9 for the first environment are provided on a front surface and a second inlet port 10 and a second discharge port 11 for the second environment are provided on the back surface, a blast fan 13 for the first environment provided in the body case 12, and a heat exchanger 14 for performing heat exchange between the first environmental air and the second environmental air in the body case 12. The heat exchanger 14 forms a blast lane by alternatively overlapping two kinds of plate bodies (plate body A15a, plate body B15b) each having a shield wall on the outer circumference with a predetermined spacing. During overlapping, the entire circumference is welded after being temporarily jointed to a linear welding line in the overlapping direction of the plate bodies. Thus, the degree of sealing in layering elements of the heat exchanger which sufficiently affects waterproof and dust prevention property can be enhanced.

Description

  The present invention relates to a heat exchange type cooling device and a heating element storage device using the same.

  For example, since a current of several tens of amperes or more flows in a mobile phone base station, it is also expressed as a heating element in a certain point. In other words, cooling is extremely important in order to stabilize the operation. Such a mobile phone base station has the following configuration in order to cool it (see FIG. 13).

  That is, it has a configuration that includes a cabinet that houses a transmitter / receiver serving as a heating element, and a heat exchange device 101 that is mounted in an opening of the cabinet. And as shown in FIG. 13, as the structure of the heat exchange apparatus 101, it has the 1st inlet 107 and the 1st blower outlet 108 for external air, and the 2nd inlet 109 and the 2nd blower outlet 110 for cabinet inside. The main body case 111, the first blower 112 for outside air and the second blower 113 for inside the cabinet provided in the main body case 111, and heat exchange between outdoor air and cabinet air are performed in the main body case 111. And a heat exchanger 114. Furthermore, the blower (the first blower 112 and the second blower 113) and the control circuit 115 are provided in different sections, and the control circuit 115 is not the side of the first blower 112 that blows outside air containing dust, but the cabinet. It was provided adjacent to the second blower 113 on the side (Japanese Patent Laid-Open No. 10-190270 as a prior art similar to this).

  Further, although not shown, in another prior art document, there is a main body case having a first intake port and a first discharge port for outside air, and a second intake port and a second discharge port for the inside of the cabinet, The structure provided with the provided 1st ventilation fan for the outside air, the 2nd ventilation fan for the inside of a cabinet, and the heat exchanger which performs heat exchange with the outdoor air and the air in a cabinet in the said main body case is disclosed. Has been. This heat exchanger has a configuration in which a second plate and a third plate are superposed on the surface of the first plate at a predetermined interval on the surface of the second plate. The surface of the first plate body on the second plate body side includes a plurality of first rectifying walls that partition the surface of the first plate body in a lane shape, and the third plate body side of the second plate body A plurality of second rectifying walls for partitioning the surface of the second plate body in a lane shape are provided on the surface of the second plate body. (Note that Japanese Laid-Open Patent Publication No. 10-170176 is a prior document similar to this).

JP-A-10-190270 JP-A-10-170176

  In the conventional heat exchanging apparatus 101, a structure in which two blowers, that is, a first blower 112 for outside air, a second blower 113 for use in a cabinet, and a heat exchanger 114 are accommodated in one main body case 111. The main body case 111 is adjacent to the transmitter / receiver 115 of the base station of the mobile phone. On the other hand, a current of several tens of amperes flows through the transmitter / receiver 115, and protection for protecting from water and dust is required. And since the external air and the air in a cabinet pass adjacently as for the heat exchanger as shown by patent document 2, the high waterproof and dustproof performance is requested | required.

  Therefore, the present invention aims to improve the hermeticity at the time of stacking elements of a heat exchanger that greatly affects the waterproof and dustproof performance.

In order to achieve this object, the present invention
A main body case provided with a first suction port and a first air outlet for the first environment on the front surface and a second air inlet and a second air outlet for the second environment on the back surface, and provided in the main body case A first environment blower fan, and a heat exchanger for exchanging heat between the air in the first environment and the air in the second environment in the main body case, the heat exchanger having a shielding wall on an outer periphery. A plurality of two types of plate bodies (plate body A and plate body B) are alternately polymerized in a state of being spaced apart by a predetermined distance to form a blower lane. After temporarily fastening with the welding wire, the entire periphery is welded, thereby achieving the intended purpose.

As described above, the present invention
A main body case provided with a first suction port and a first air outlet for the first environment on the front surface and a second air inlet and a second air outlet for the second environment on the back surface, and provided in the main body case A first environment blower fan, and a heat exchanger for exchanging heat between the air in the first environment and the air in the second environment in the main body case, the heat exchanger having a shielding wall on an outer periphery. A plurality of two types of plate bodies (plate body A and plate body B) are alternately polymerized in a state of being spaced apart by a predetermined distance to form a blower lane. Since the entire periphery is welded after temporarily fastening with the welding wire, the intended purpose is achieved. That is, when stacking a large number of plates, the shape of the heat exchanger is preliminarily formed by temporarily fixing. Thereafter, the entire welding surface can be welded so that there is no leakage from the air blowing lane. Therefore, the sealing degree at the time of stacking elements of the heat exchanger is improved.

The perspective view which shows the example of installation of one Embodiment of this invention Sectional view of the heat exchange device and heating element storage device Perspective view of the heat exchanger External perspective view of the heat exchanger The figure showing the polymerization state of the plate of the heat exchanger Plan view of plate B and plate A of the heat exchanger Detailed view showing polymerization state of plate of heat exchanger Body case assembly diagram of the heat exchanger Cross section of the heat exchanger main unit case First air outlet perspective view of the heat exchanger First outlet cross-sectional view of the heat exchanger Perspective view of the circulation fan Configuration diagram of conventional heat exchanger

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
In FIG. 1, reference numeral 1 denotes a building, and a mobile phone base station 3 is provided on the rooftop 2 thereof. The base station 3 is provided with a box-like cabinet 4, a transmitter / receiver 5 provided in the cabinet 4, and a door 7 that can be opened and closed at the front opening of the cabinet 4. It is attached.

  As shown in FIGS. 2 and 3, the heat exchange device 6 has a first suction port 8 and a first air outlet 9 for outside air (first environment) and the cabinet 4 (second environment, hereinafter referred to as inside air). ) Second air inlet 10 and second air outlet 11, a blower fan 13 for outside air provided in the body case 12, and heat of the outside air and the inside air in the body case 12. And a heat exchanger 14 for performing exchange.

  As shown in FIGS. 4 to 6, the heat exchanger 14 is made of a substantially rectangular synthetic resin, and a plurality of types of plate bodies (plate bodies A15a and B15b) are alternately separated by a predetermined interval. It is a configuration in which sheets are superposed. A plurality of rectifying walls (rectifying walls A21a and B21b) that divide the surface into lanes are provided on the surface of the plate. That is, when the plate A15a and the plate B15b are polymerized, a ventilation lane is formed between the plates by the rectifying wall A21a and the rectifying wall B21b.

  This will be described in more detail. First, the air lane on the plate body A15a side flows in from an inlet (a first inlet 14a described later) provided on the lower short side, and the upper short side along the L-shaped rectifying wall A21a on the surface thereof. Proceed toward the side. And it curves to one long side in front of the upper short side, and is connected to an outlet (first outlet 14b described later) provided on the upper side of one long side. Outside air (air in the first environment) passes through the air blowing lane formed on the plate A15a.

  In addition, a plurality of U-shaped rectifying walls B21b having a long side at the bottom are provided on the surface of the plate body B15b. That is, in the blower lane on the surface of the plate body B15b, along the U-shaped rectifying wall B21b on the surface, one long side upper part flows in as an inflow port (second inflow port 14c described later), and enters the short side. After traveling along, it curves on the other long side. Then, after proceeding along the long side and curving on the lower short side, it flows out from an outlet (second outlet 14d described later) provided at the lower part of the same long side as the inlet. Inside air (air of the second environment) passes through the air blowing lane formed on the plate body B15b.

  As shown in FIGS. 2 and 4, the heat exchanger 14 in which such plate bodies (plate body A 15 a and plate body B 15 b) are superposed has a bottom surface of the first inlet 14 a (first air inlet for the environment). The outside air outlet (first outlet 14b) is provided at one upper portion of the side surface and connected to the first outlet 9. A second inflow port 14c (second environmental air suction port) on the inside air side is formed at a position facing the first outflow port 14b. The inside air-side outlet (second outlet 14d) is provided in the lower part of the same surface as the second inlet 14c, and is connected to the second outlet 11.

  And as shown in FIG. 2, the ventilation fan 13 for external air is provided in the position which sends in air toward the 1st inflow port 14a. On the other hand, the warm air in the cabinet 4 is fed into the second inflow port 14 c for the air inside the cabinet 4 from a circulation fan 17 for inside air provided in the upper part of the cabinet 4.

  Next, the operation of the heat exchange device 6 will be described. The air (inside air) heated to high temperature by the transmitter / receiver 5 in the cabinet 4 is transferred from the second suction port 10 of the heat exchange device 6 to the heat exchanger 14 by the circulation fan 17 provided near the top surface in the cabinet 4. It is sent in. The hot air in the cabinet 4 flows into the heat exchanger 14 immediately after flowing into the second suction port 10. On the other hand, the cold outside air is sucked from the first suction port 8 by the operation of the blower fan 13 and sent to the first inlet 14 a of the heat exchanger 14. In the heat exchanger 14, heat exchange is performed between the cold outside air and the high temperature inside air, and the cooled inside air is blown into the cabinet 4 from the second outlet 11, and the outside air is discharged from the first outlet 9. It will be released again to the outside air.

  According to such a configuration, since rectangular plate bodies (plate bodies A15a and B15b) are used, an area for performing heat exchange is secured and the heat exchange device 6 is efficient. And the structure which draws in high temperature air from the cabinet 4 side surface and blows it out to the cabinet 4 side surface by the U-shaped inside air side ventilation lane is realizable. Furthermore, the circulation fan 17 is a compact heat exchange device 6 with a reduced size in the vertical direction because the rotation shaft is provided perpendicular to the top surface of the cabinet 4.

  Further, as shown in FIG. 6, the plate body B15b is provided with shielding walls 22a on three sides which are on the outer peripheral side of the plate body and on the outer peripheral side of the U-shaped air lane. And the shielding wall 22b is provided in the center part of the remaining one side (long side). That is, the second inlet 14c and the second outlet 14d are formed between the shielding wall 22a and the shielding wall 22b. And in the lower part of the shielding wall 22a, that is, the portion that is in front of the second outlet 14d of the outermost blower lane, an upward slope is provided toward the second outlet 14d, and the liquid reservoir 23 is formed. .

  The effect | action by such a structure is demonstrated. The high-temperature inside air heated in the cabinet 4 is cooled in the heat exchanger 14 by heat exchange with outside air. At this time, moisture contained in the inside air may condense. Alternatively, moisture may be sent into the heat exchanger 14 by the circulation fan 17. The liquid reservoir 23 traps moisture in the heat exchanger 14 so as not to flow out of the heat exchanger 14. The electronic device in the cabinet 4 is prevented from malfunctioning or failing due to water intrusion.

  Further, the plate body A15a is provided with a shielding wall 22c over the short side and the long side on the outer peripheral side of the plate body and on the curved outer side of the L-shaped air lane. A shielding wall 22d is provided on a part of the other long side. That is, the first inflow port 14a and the first outflow port 14b are formed between the shielding wall 22c and the shielding wall 22d.

  When such plate A15a and plate B15b are superposed, their periphery is thermally welded so that air does not leak out of the heat exchanger 14 from the air blowing lane. That is, the portion where the shielding wall 22a, the shielding wall 22b, the shielding wall 22c, and the shielding wall 22d overlap is thermally welded. At this time, if the entire welding surface is welded at once, the size accuracy of the entire heat exchanger 14 is deteriorated or the welding is insufficient. Therefore, as shown in FIG. 4, the entire welded surface is welded to the welded surface after temporarily fastening with a linear welded wire 14 e in the polymerization direction of the plate. By such a method, while ensuring the size accuracy of the heat exchanger 14, it is possible to make a heat exchanger 14 that does not leak by completely performing welding. Further, a waterproof coating is applied to the joint surfaces after heat welding with an acrylic urethane resin material or the like so that moisture does not enter the heat exchanger 14.

  In addition, the heat exchanger 14 has been described as alternately superposing the plate bodies A15a and B15b. However, as shown in FIG. 5, a plurality of the same plate bodies may be continuously polymerized at the end in the superposition direction. Good. For example, two plate bodies A15a are stacked at the end, or two plate bodies B15b are stacked. Since the plate A15a and the plate B15b are thin sheets made of synthetic resin, one of the end portions is easily deformed when they are superposed. Therefore, by stacking a plurality of plate bodies having the same shape, the strength of the end portion is ensured and deformation is difficult.

  Further, as shown in FIG. 7, the shielding wall 22b of the plate body B15b fits with the shielding wall 22c of the plate body A15a. At this time, the shielding wall 22c is formed with a protrusion 22c-1 inserted into the entire shielding wall 22b, and the shielding wall 22b is formed with a plurality of protrusions 22b-1 inserted into the shielding wall 22c. The protrusion 22b-1 is provided at least at both ends of the shielding wall 22b. That is, the shielding wall 22b has a high part (projection part 22b-1) and a low part. And when this shielding wall 22b and shielding wall 22c fit, the top part of projection part 22b-1 of shielding wall 22b contact | abuts the top part inside projection part 22c-1 of shielding wall 22c, and projection of shielding wall 22c The top of the portion 22c-1 contacts the lower portion of the shielding wall 22b. And in the edge part by the side of the shielding wall 22b of the 2nd inflow port 14c and the 2nd outflow port 14d, projection part 22c-1 and projection part 22b-1 will contact, and it will be in a firm superposition state, and the 2nd inflow port 14c, The second outlet 14d is accurately formed. Such a configuration is the same in the other inflow ports and outflow ports, and forms a strong polymerization state at the end portions of the inflow ports and the outflow ports.

  Next, the main body case 12 will be described with reference to FIGS.

  As shown in FIG. 8, the main body case 12 includes a back plate 12 a on the back side, a box 12 b provided on the front side (which can also be expressed as the front side of the frame), and a fan casing 12 c that covers the blower fan 13. It consists of A frame 12d for fitting the heat exchanger 14 is provided on the back plate 12a. The frame 12d covers the top and side surfaces of the heat exchanger 14 without the inlet / outlet, and has drain holes 12e in the lower part of both side surfaces near the outlet of the heat exchanger 14.

  As shown in FIG. 9, the back plate 12a is provided with a second inlet 10 and a second outlet 11 so as to face the second inlet 14c and the second outlet 14d. A packing 26 and a packing 27 are provided between the second inlet 14c and the second outlet 14d and the second inlet 10 and the second outlet 11 to ensure confidentiality. Further, a V-rib 28 having a downward slope on the front side is provided at a portion where the bottom surface of the heat exchanger 14 contacts. Further, the frame 12d has a flange shape projecting outward at an end portion on the front surface side, and when the box body 12b is fixed, it is fixed from the front surface side to the rear surface side by screwing or the like.

  Next, the box body 12b has a shape that covers the front and bottom surfaces of the heat exchanger 14, and is attached so as to press the heat exchanger 14 into the back plate 12a. A first air outlet 9 is provided on the upper front surface corresponding to the first outlet 14b, and a first air inlet 8 is provided on the bottom surface corresponding to the first inlet 14a. A V-shaped bent portion 29 is provided at the bottom end of the box 12b so as to correspond to the V rib 28 described above. A packing 30 is provided on the outer peripheral inner surface side of the first suction port 8.

  In such a main body case 12, an operation when the heat exchanger 14 is attached will be described. First, the heat exchanger 14 is housed in the frame 12d so that the back side of the bottom surface is in contact with the base of the V-rib 28. And the box 12b is attached from the front side of the heat exchanger 14. FIG. At the time of this attachment, when fixing the box 12b and the frame 12d by screwing or the like, the heat exchanger 14 is pressed to the back plate 12a side, and the front surface of the V rib 28 and the box 12b are pressed. The provided V-shaped bent portion 29 comes into contact with it, and the pressing force to the back side is also distributed to the upper side. Therefore, the heat exchanger 14 is pressed in both the rear side and the upper side, and the packing 26, the packing 27, and the packing 30 are pressed and sealed.

  Further, the frame 12d has a flange shape projecting to the outer peripheral side, and the box body 12b is received by this flange and fixed with screws or rivets. That is, since the screw (or rivet) and the heat exchanger 14 are in a positional relationship that does not interfere with each other, the heat exchanger 14 can be attached and detached without damaging the heat exchanger 14.

  Further, as shown in FIG. 8, the blower fan 13 is covered with a trapezoidal fan casing 12c. The fan casing 12c has one side of the trapezoid as a suction port, the side of the long bottom side of the trapezoid is directed to the first inlet 14a, and these two sides are opened. The blower fan 13 is a turbo centrifugal blower, and a rotation shaft is installed in a vertical direction at a suction port (a surface to be used) of the fan casing 12c. According to such a fan casing 12c, the air blown out from the centrifugal blower fan 13 collides with the side surface of the fan casing 12c, and the pressure is increased on the lower bottom surface (the shorter side of the trapezoid), and the upper bottom surface (the longer trapezoidal shape). Air flows to the first inlet 14a provided on the side. At this time, since it has a trapezoidal shape in which the blowout side (the first inflow port 14a side) is expanded, the stagnation of air is reduced and the air is efficiently introduced into the heat exchanger 14.

  Further, a drain hole 31 is provided near the bottom surface of the fan casing 12c to discharge moisture that has entered the apparatus. The drain hole 31 is provided on the front side in the rotational direction of the blower fan 13 so that moisture can be discharged smoothly.

  As shown in FIGS. 10 and 11, the box body 12 b is provided with the first air outlet 9 as described above and communicates with the first outlet 14 b of the heat exchanger 14. A louver 32 is attached to the first air outlet 9. The louver 32 includes a flap portion 32a through which blown air passes, and a frame portion 32b attached to the box 12b provided around the flap portion. Between the frame part 32b and the flap part 32a, a groove part 32c is provided on the box body 12b side. A bent portion 33 that fits with the groove 32c is provided around the first air outlet 9 of the box 12b. In such a first air outlet 9, the bent portion 33 is fitted into the groove portion 32 c so that the top portion of the bent portion 33 comes into contact with the bottom of the groove portion 32 c provided on the louver 32 (becomes the front side of the louver 32). Match. Further, caulking 34 is applied between the bent portion 33 and the heat exchanger 14 so that water droplets do not enter the box 12b. Moreover, since the wall of about 90 degree | times is formed between the bending part 33 and the heat exchanger 14, while being able to confirm the coating condition of a caulking agent, the caulking operation | work which ensures a sealing degree can be performed.

  Further, the louver 32 is screwed by sandwiching a flange portion provided on the frame 12d through the box 12b. Even when the louver 32 is screwed, the heat exchanger 14 is not damaged. The louver 32 may be riveted.

  As shown in FIG. 12, the circulation fan 17 is provided on the top surface of the cabinet 4 and is a box-shaped case 41 having a small thickness. The circulation fan 17 includes a turbo centrifugal blower 42 therein, and is provided with a circulation fan inlet 43 on the lower surface and a circulation fan outlet 44 on one side surface. The circulation fan outlet 44 is provided with bars in a lattice shape, and a plurality of rectifying plates 45 for rectifying the blown airflow are provided therein. The rectifying plate 45 has an upper side in contact with the top surface of the case 41 on the upstream side of the circulation fan outlet 44. Further, the direction is provided such that the upstream side is inclined to the high pressure side of the air flow created by the impeller of the circulation fan 17. That is, the front in the rotational direction is inclined to the downstream side. According to such a configuration, in the impeller of the circulation fan 17, the wind speed is high on the side of the impeller main plate (the surface opposite to the circulation fan suction port 43). By providing the rectifying plate 45 at the high wind speed portion and eliminating the rectifying plate 45 at the relatively slow wind speed portion to reduce the resistance, the wind velocity in the vertical direction can be made uniform. Further, at the circulation fan outlet 44, there is a bias in the air flow distribution, but due to the inclination of the rectifying plate 45, a uniform air flow flows into the heat exchanger 14. By feeding uniform air to the heat exchanger 14, the performance of the heat exchanger 14 is extracted and the heat exchange efficiency is improved.

  Moreover, as shown in FIG. 8, the body case 12 is provided with a drain hole 12e at a position corresponding to the lower part of the heat exchanger 14 (that is, the lower part of the side surface of the frame 12d). Since air is sent to the heat exchanger 14 by the blower fan 13 and the circulation fan 17, the inside of the main body case 12 becomes a positive pressure. Even if water enters the main body case 12 through a gap or the like of the packing, the water is pushed out by the positive pressure air from the drain hole 12e provided in the lower side of the side surface of the frame 12d, and the second air outlet 11 of the main body case located downstream. The water is prevented from flowing out. And the electronic device in the cabinet 4 by the penetration | invasion of water is preventing malfunctioning or failure.

  As described above, the present invention provides a first case for the first environment and a first air outlet on the front surface, and a main body case having the second environment for the second air inlet and second air outlet on the back surface, A heat exchanger for exchanging heat between air in the first environment and air in the second environment in the main body case; and a heat exchanger for exchanging heat between the air in the first environment and the air in the second environment. Is formed by superposing two types of plate bodies (plate body A and plate body B) having a shielding wall on the outer periphery in a state where they are alternately separated by a predetermined distance to form a blowing lane, Since the entire periphery is welded after temporarily fastening with a linear welding wire in the body polymerization direction, for example, a communication device in which electronic equipment into the cabinet due to water intrusion may malfunction or fail Extremely useful as a cooling facility for base stations and other outdoor equipment The things.

DESCRIPTION OF SYMBOLS 1 Building 2 Rooftop 3 Base station 4 Cabinet 5 Transmitter / receiver 6 Heat exchange device 7 Door 8 1st inlet 9 First outlet 10 Second inlet 11 Second outlet 12 Body case 12a Back plate 12b Box 12c Fan casing 12d Frame 12e Drain hole 13 Blower fan 14 Heat exchanger 14a First inlet 14b First outlet 14c Second inlet 14d Second outlet 14e Welding wire 15a Plate A
15b Plate B
17 Circulating fan 21a Rectifying wall A
21b Rectification wall B
22a Shielding wall 22b Shielding wall 22b-1 Protruding part 22c Shielding wall 22c-1 Protruding part 22d Shielding wall 23 Liquid reservoir part 26 Packing 27 Packing 28 V-rib 29 V-shaped part 30 Packing 31 Drain hole 32 Louver 32a Flap part 32b Frame Part 32c Groove part 33 Bending part 34 Coking 41 Case 42 Centrifugal blower 43 Circulating fan inlet 44 Circulating fan outlet 45 Current plate

Claims (4)

A main body case provided with a first suction port and a first air outlet for the first environment on the front surface and a second air inlet and a second air outlet for the second environment on the back surface, and provided in the main body case A fan for the first environment, and a heat exchanger for exchanging heat between the air in the first environment and the air in the second environment in the main body case,
The heat exchanger forms a blower lane by superposing two or more types of plate bodies (plate body A, plate body B) having a shielding wall on the outer periphery in a state of being alternately separated by a predetermined distance,
A heat exchanging device characterized in that, when the polymerization is performed, the entire periphery is welded after being temporarily fastened with a linear welding wire in the polymerization direction of the plate. The heat exchange device according to claim 1, wherein a waterproof coating is applied to a joint surface after welding of the heat exchanger. The heat exchanger according to claim 1, wherein the heat exchanger continuously superposes the same plate at an end portion in a superposition direction. The shielding wall has a structure in which the shielding wall of the plate body A and the shielding wall of the plate body B are fitted to each other,
A plurality of protrusions that are inserted inside the shielding wall of the plate A are formed on the shielding wall of the plate B,
The shielding wall of the plate body A is formed so as to be entirely inserted inside the shielding wall of the plate body B,
The top of the protrusion of the shielding wall of the plate body B abuts on the top of the inside of the shielding wall of the plate body A,
The heat exchange device according to claim 1, wherein a top portion of the protruding portion of the shielding wall of the plate body A comes into contact with a lower portion of the shielding wall of the plate body B.

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