JP5287431B2 - Cooling system - Google Patents

Description

  The present invention relates to a cooling device installed in a box structure installed outdoors and an improvement in the cooling capacity thereof.

  For example, a base station of a mobile phone is covered with a box-shaped structure (box), and a control board on which a communication circuit is mounted is housed. Since a current of several tens of amperes or more flows through the circuit, 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.

  In recent years, higher performance of electronic components and higher density of electronic components with respect to the control board have progressed, and the amount of heat generated from the control board has increased dramatically. Along with this, the temperature inside the base station (in the box) of the mobile phone tends to rise, which has a great influence on the operation guarantee and product life of the electronic components on the control board. For this reason, about the cooling device used in order to cool the inside of a box, the improvement of the cooling capability is calculated | required.

Hereinafter, the conventional cooling device will be described. As shown in FIG. 12, the cooling device includes an inside air passage 104 and an outside air blower 105 that take in the air from the heating element storage box through the inside air suction port 103 having the same central axis as the inside air blower 102 and return the air inside the housing 101. A heat exchanger 108 that has an outside air passage 107 that takes in outside air from the outside air inlet 106 having the same central axis as that of the outside air and that discharges the outside to the outside, and exchanges sensible heat between the inside air and outside air that is arranged at the intersection of both air passages. The heating element storage box is cooled in such a manner that it is installed on the cover of the heating element storage box.
JP 2000-161875 A

  Such a heating element storage box is desired to have a small installation space, and the miniaturization is progressing due to high-density mounting of electronic components. Because the cooling device installed on the door is limited in external dimensions by the size of the door, it is difficult to improve the cooling capacity by increasing the size of the blower, and it is necessary to improve the cooling capacity while maintaining the size of the blower. Is required.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a cooling device having a structure having a sufficient cooling action with respect to the inside of a heating element storage box.

  In order to achieve the above object, the cooling device of the present invention takes the air of the heating element storage box into the front surface of the casing and returns the air to the heating element storage box and circulates it, and the rear surface with the outside air. It has an outside air passage that takes in and discharges to the outside air, and is arranged at the intersection of the outside air blower that carries the air in the outside air passage, the inside air blower that carries the air in the inside air passage, and the outside air passage and the inside air passage. A heat exchange element for exchanging sensible heat between the outside air and the inside air, and an opening for taking in outside air on the back surface of the housing, and a connecting member for connecting the opening to the suction port of the outside air blower. The center is eccentric from the center of the air inlet of the blower.

  By this means, the heating element is decentered upward and enlarged with respect to the rotation center axis of the suction port of the outside air blower installed at the lower end of the limited outside air blower installation space. A cooling device having an enlarged effective volume for taking in outside air from a limited space between the cover of the storage box and the cooling device can be obtained.

  In another aspect, an inclined surface is provided on the upper part of the connecting member from the opening toward the suction port of the outside air blower.

  By this means, from the upper surface of the opening to the plane of the upper part of the suction port of the outside air blower is communicated with a straight slope, and a gentle inflow path from the plane to the arcuate suction port is secured, thereby causing a sudden contraction pressure loss. A cooling device can be obtained.

  Another means is characterized in that the lower end portion of the inclined surface is in contact with the upper surface of the suction port of the outside air blower.

  By this means, the cooling device that rectifies the air flowing from the suction port of the outside air blower and reduces the pressure loss of the opening portion by connecting the upper surface of the opening to the surface in contact with the arc of the suction port of the outside air blower at an inclination. can get.

  In another aspect, an inclined surface is provided in the lower part of the connecting member from the opening toward the suction port of the outside air blower.

  By this means, from the lower surface of the opening to the plane of the lower part of the suction port of the outside air blower is communicated with a straight slope, and a gradual inflow path from the plane to the arcuate suction port is secured, thereby causing a sudden contraction pressure loss. A cooling device can be obtained.

  Further, the other means is characterized in that the inclined surface is parallel to the louver with respect to the louver disposed on the cover of the heating element storage box.

  By this means, it becomes possible to send to the outside air blower without changing the flow of air taken in from the cover, and a cooling device that reduces the opening pressure loss can be obtained.

  Further, the other means is characterized in that the connecting member forms a conical constricted surface from the circumference of the opening toward the circumference of the suction port of the outside air blower.

  By this means, it is possible to communicate from the circumference of the opening to the circumference of the suction port of the outside air blower by the slant conical squeezing, and a cooling device that greatly reduces the opening pressure loss can be obtained.

  Another means is that guide plates having slopes are provided on both sides from the bottom surface to the side surface of the cooling device.

  By this means, by providing guide plates on both side surfaces of the outside air blower, it is possible to obtain a cooling device that suppresses air turbulence that occurs at the corners of the inner wall of the cooling device and enhances the rectifying action.

  In another means, the guide plate has a circular arc shape tangent to the bottom surface and both side surfaces of the cooling device.

  By providing arc-shaped guide plates on both sides of the outside air blower by this means, the maximum pressure at the lowest point of the outside air blower can be gradually released along the arc of the guide plate. An effect is obtained.

  Another means is to provide a drain port for drainage disposed between the outside air blower and the bottom of the box body, and the outlet is along a plane perpendicular to the rotation axis of the outside air blower and the outside air. A path is provided so as to discharge in the rotation direction of the blower.

  By this means, a cooling device with high drainage can be obtained by utilizing the rotation direction of the blower and the wind pressure.

  According to the present invention, in a limited outside air blower installation space, the opening center of the housing that takes in outside air is decentered upward with respect to the rotation center axis of the suction port of the outside air blower, and the cover of the heating element storage box and the cooling By expanding the effective volume for taking outside air from the limited space with the device, a cooling device with high cooling capacity can be provided.

  In addition, by connecting a straight slope between the upper surface of the opening and the plane above the suction port of the outside air blower and securing a gentle inflow path from the plane toward the arc-shaped suction port, the sudden contraction pressure loss is reduced. Reduction and a cooling device with high cooling capacity are obtained.

  In addition, by connecting the upper surface of the opening to the surface in contact with the arc of the suction port of the outside air blower at an inclination, the air flowing from the suction port of the outside air blower is rectified, and the air volume is improved while reducing the pressure loss of the opening. A cooling device with high cooling capacity can be obtained.

  In addition, the sudden contraction pressure loss is reduced by connecting the lower surface of the opening to the plane below the suction port of the outside air blower with a straight slope and securing a gentle inflow path from the plane toward the arc-shaped suction port. Thus, a cooling device having a high cooling capacity can be obtained.

  Further, by making the inclination of the louver parallel to the inclination arranged at the lower part of the connecting member, it is possible to send the air into the outside air blower without changing the flow of air taken in from the cover, and the opening pressure loss is reduced. A cooling device having a high cooling capacity with an improved air volume can be obtained.

  In addition, by connecting the circumference of the opening to the circumference of the suction port of the outside air blower with a slanted conical squeeze, cooling with high cooling capacity that improves the air volume while reducing the pressure loss at the opening to the maximum A device is obtained.

  In addition, by providing guide plates on both sides of the lower part of the casing where the outside air blower is installed, air turbulence that occurs at the corners of the inner wall of the casing can be suppressed, so the air volume and rectifying action are improved, and the cooling capacity is high. A cooling device is obtained.

  In addition, by providing arc-shaped guide plates on both side surfaces of the lower part of the casing where the outside air blower is installed, the pressure increasing effect that gradually releases the maximum pressure at the lowest point of the outside air blower along the arc of the guide plate Therefore, the air volume is improved and a cooling device with high cooling capacity is obtained.

  In addition, by utilizing the wind pressure generated by the rotation of the outside air blower and its direction, it is possible to spout rainwater and dust that has entered the inside of the housing from the inclined drainage hole, and a cooling device with high drainage Is obtained.

  The cooling device according to claim 1 of the present invention is an outside air that takes in the air of the heating element storage box into the casing and returns and circulates the air inside the heating element storage box, and the outside air that takes in and discharges the outside air. An outside air blower that has an air path and carries the air in the outside air path, an inside air blower that carries the air in the inside air air path, and the sensible heat of the outside air and the inside air are exchanged at the intersection of the outside air path and the inside air air path. An opening for taking in outside air in the housing, and a connecting member for connecting the opening to the suction port of the outside air blower, the center of the opening being more than the center of the suction port of the blower It is eccentric upward, and has the effect of increasing the effective volume for taking in outside air from the limited minimal space between the cover of the heating element storage box and the cooling device.

  In addition, the cooling device according to claim 2 is provided with an inclined surface from the opening toward the suction port of the outside air blower on the upper part of the connecting member, and a flat surface from the upper surface of the opening to the suction port of the outside air blower. By communicating with a straight slope, it is possible to secure a gentle inflow path and to reduce sudden contraction pressure loss.

  The cooling device according to claim 3 is such that the lower end portion of the inclined surface is in contact with the upper surface of the suction port of the outside air blower, rectifies the air flowing from the suction port of the outside air blower, and the pressure loss of the opening portion. It has the effect | action of reducing.

  The cooling device according to claim 4 is provided with an inclined surface at the lower part of the connecting member from the opening toward the suction port of the outside air blower, and gradually from the opening toward the arc-shaped suction port. By securing a simple inflow path, it has the effect of reducing sudden contraction pressure loss.

  In the cooling device according to claim 5, the inclined surface is parallel to the louver disposed on the cover of the heating element storage box, and the outside air is not changed without changing the flow of air taken in from the cover. It can be fed into the blower and has an effect of reducing the opening pressure loss.

  Further, in the cooling device according to claim 6, the connecting member has an inclined cone-shaped squeezing surface from the circumference of the opening toward the circumference of the suction port of the outside air blower. It has the effect | action that a opening part pressure loss is reduced significantly by making a circumference communicate without a level | step difference.

  Further, the cooling device according to claim 7 is provided with guide plates having inclinations from the bottom surface to the side surface of the cooling device on both sides of the lower portion of the housing where the outside air blower is installed, and at the corners of the inner wall of the cooling device. It has the effect of suppressing turbulence of air that occurs and rectifying.

  In the cooling device according to claim 8, the shape of the guide plate is an arc shape that is tangent to the bottom surface and both side surfaces of the cooling device, and the maximum pressure at the lowest point of the outside air blower is set. By gradually opening along the arc of the guide plate, there is an effect that a high boosting effect can be obtained.

  The cooling device according to claim 9 is provided with a discharge port in a drain pan for drainage disposed between the outside air blower and the bottom surface of the box, and the discharge port is formed on a surface orthogonal to the rotation axis of the outside air blower. It is a drain hole provided with a path so as to be discharged along the direction of rotation of the outside air blower, and has an effect that high drainage is obtained by utilizing the wind pressure generated by the rotation of the blower and its direction.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is an installation diagram of cooling device A according to Embodiment 1 of the present invention, FIG. 2 is a view of the indoor side of the cooling device A according to Embodiment 1 of the present invention, and a configuration diagram thereof, and FIG. It is an outdoor appearance figure of cooling device A in Embodiment 1 of an invention, and shows the state where cooling device A was installed in the horizontal direction.

  The cooling device A is attached to an openable / closable cover C of the heating element storage box B, and is attached to the “door integrated type”.

  Hereinafter, the internal configuration of the cooling device A will be described.

  As shown in FIGS. 1 to 3, the cooling device A is arranged inside the box-shaped housing 1 with the inside air suction port 2 of the inside air blower 4 facing the inside of the heating element storage box B, and the outside air blower 12. It has a structure in which the outside air suction port 9 is arranged outward and the heat exchange element 5 is arranged in the middle. Here, the inside air suction port 2 disposed on the front surface is a rectangular opening at the top of the panel 8, and the outside air suction port 9 installed on the back surface includes the opening 10 of the housing 1 and the suction port 13 of the outside air blower 12. And a connecting member 11 a provided between the opening 10 and the suction port 13. An orifice 3 is provided in the suction port 13 of the outside air blower 12. Further, the center of the opening 10 is installed eccentrically above the center of the suction port 13 of the outside air blower 12.

  The air in the heating element storage box B (hereinafter referred to as “inside air”) is taken into the inside air blower 4 from the inside air suction port 2, passes through the heat exchange element 5, and passes through the inside air outlet 6. A circulated inside air passage 7 is formed to return to the inside of the heating element storage box B.

  On the other hand, after the outside air is taken into the outside air blower 12 from the outside air inlet 9 via the louver 16 installed on the cover C of the heating element storage box B, it passes through the heat exchange element 5 and enters the outside air outlet. An outdoor air passage 15 for discharging to the outside air is formed via 14. The inside air blower 4 and the outside air blower 12 are centrifugal blowers.

  The heat exchange element 5 is a substantially rectangular parallelepiped, and the inside of the heat exchange element 5 is formed by laminating a large number of heat transfer plates, and alternately forms independent air passages for exchanging sensible heat between the outside air and the inside air. And the outside air passage 15 are arranged at the intersection.

  Hereinafter, a detailed configuration around the outside air blower 12 will be described with reference to FIGS.

  The suction port 13 of the outside air blower 12 and the opening of the orifice 3 are concentric circles, and the orifice 3 is installed so as to fit the front surface of the suction port 13 of the outside air blower 12. The outside air blower 12 integrated with the orifice 3 is attached so as to suck in outside air from the opening 10 of the housing 1. Furthermore, between the opening 10 of the housing | casing 1 and the orifice 3 distribute | arranged to the external air blower 12, the cylindrical connection member 11a which connects both is arrange | positioned and closely_contact | adhered.

  In the door-integrated cooling device A, there are restrictions on the size of the box, and in order to improve the cooling capacity while maintaining the outer dimensions of the housing 1, the amount of processing air exchanged through the heat exchange element is increased. Therefore, it is desirable to enlarge the opening 10 of the housing for sucking outside air. However, the outside air blower 12 is disposed at the lower end of the housing 1 because the distance to the heat exchange element 5 is limited. If the opening 10 is enlarged as it is, the opening is located at the lowermost portion of the housing 1. The problem that the rigidity of the housing | casing 1 falls arises. Therefore, an effective volume that can take in the outside air by taking a structure in which the central axis of the opening 10 of the housing 1 is decentered upward with respect to the rotation central axis of the outside air blower 12 arranged at the lower end of the housing to increase the opening area. As a result, the cooling capacity can be improved by increasing the inflow of outside air.

  Hereinafter, the connecting member 11a will be described in more detail with reference to FIGS.

  As shown in FIG. 5, a linear upper inclined surface 17 a is provided on the upper portion of the connecting member 11 a from the opening 10 of the housing toward the suction port of the outside air blower 12. According to this configuration, it is possible to secure a path through which the air flowing in from the opening 10 of the housing gently flows, and to reduce the sudden contraction pressure loss in the upper portion of the outside air inlet 9.

  Alternatively, as shown in FIG. 6, a straight upper inclined surface 17 b that contacts the arc of the suction port 13 of the outside air blower 12 from the opening 10 of the housing may be provided on the upper portion of the connecting member 11 b. According to this configuration, there is an effect of rectifying the air flowing in from the opening 10 of the housing, and it is possible to reduce the opening pressure loss and the sudden contraction pressure loss in the upper portion of the outside air inlet 9 and improve the air volume. it can.

  As shown in FIG. 7, a linear lower inclined surface 17 c is provided at the lower part of the connecting member 11 c from the opening 10 of the housing toward the suction port of the outside air blower 12. With this configuration, it is possible to secure a path through which the air flowing in from the opening 10 of the housing gently flows, and to reduce the sudden contraction pressure loss at the lower portion of the outside air inlet 9.

  Alternatively, as illustrated in FIG. 8, a lower inclined surface 17 d parallel to the louver 16 included in the cover C of the heating element storage box B may be provided below the connecting member 11 d. With this configuration, a path through which the flow of outside air flowing in from the cover C flows in along the inclination of the louver 16 can be secured, and the opening pressure loss at the lower portion of the outside air inlet 9 can be reduced.

  Moreover, as shown in FIG. 9, the connecting member 11e is provided with an inclined surface 17e in which the circumference from the circumference of the opening 10 of the housing to the circumference of the suction port of the outside air blower 12 is communicated by a slant conical squeeze. With this configuration, the suction surface from the opening 10 of the housing can be communicated without any step, and the opening pressure loss can be greatly reduced.

  Next, the structure of the guide plate and drain pan arranged near the outside air blower and the effects thereof will be described with reference to FIGS.

  As shown in FIG. 10, guide plates 19 a having an inclination from the bottom surface to the side surface of the housing 1 are installed on both side surfaces. According to this configuration, in the blower rotating in the rotation direction 21, the generation of turbulent vortices generated at the corner portion 20 of the inner wall is reduced, and the rectification action is increased as in the rectification direction 22 to flow into the heat exchange element 5. It is possible to improve the air volume.

  As shown in FIG. 11, the shape of the guide plate 19 b may be an arc shape tangent from the bottom surface of the housing 1 toward the side surface. According to this configuration, the flow rectifying action can be enhanced by causing the flow generated by the rotation direction 21 of the outside air blower 12 to follow the arc portion of the guide plate 19b. Further, since the outside air blower 12 is arranged near the lower end of the housing, the clearance with the drain pan 18 is narrowed, and the pressure becomes maximum at the lowest point of the outside air blower 12. Therefore, by adopting a configuration in which the pressure state can be gradually released by the guide plates 19b on both side surfaces, a high pressure increasing effect indicated by the arrow 24 is produced, and the air volume can be improved.

  Further, a drain pan 18 is provided between the bottom surface of the housing 1 and the outside air blower 12, and a drain hole 23 is provided near the center thereof. The path drained from the drain hole 23 is provided along a surface orthogonal to the rotation axis of the outside air blower, and is provided so as to be discharged in the rotation direction of the outside air blower 12. That is, the air blown out from the outside air blower 12 spreads in a spiral shape along the rotation direction of the outside air blower 12, but the drainage path of the drain hole 23 is provided along the direction of the blown out air. Will be. Therefore, according to this configuration, a smooth drainage path is secured by the rotation direction of the outside air blower 12 rectified by the inclination of the guide plate 19b and the wind pressure, and the promotion of drainage action can be promoted.

  Since the cooling device according to the present invention is small and has a high cooling capacity, it can also be used for an air conditioner.

Installation diagram of heating element storage box cooling device in embodiment 1 of the present invention Indoor side appearance diagram and structure diagram of heating element storage box cooling device in embodiment 1 Outdoor appearance view of heating element storage box cooling device in embodiment 1 The figure which shows the eccentricity of the external air blower in Embodiment 1 Structure and installation schematic diagram of connecting member 11a in the first embodiment Structure and installation schematic diagram of connecting member 11b in the first embodiment Structure and installation schematic diagram of connecting member 11c in the first embodiment Structure and installation schematic diagram of cover and connecting member 11d in the first embodiment The structure of the connection member 11e in the same Embodiment 1, and the perspective view of an external air blower Installation schematic diagram of guide plate 19a in the first embodiment Installation schematic diagram of guide plate 19b and drain pan in the first embodiment Schematic of conventional heating element storage box cooling device

DESCRIPTION OF SYMBOLS A Cooling device B Heat generating body storage box C Cover 1 Case 2 Inside air suction port 3 Orifice 4 Inside air blower 5 Heat exchange element 6 Inside air outlet 7 Panel 9 Outside air suction port 10 Opening 11a Connecting member 11b Connecting member 11c Connection Member 11d Connecting member 11e Connecting member 12 Outside air blower 13 Suction port 14 Outside air outlet 15 Outside air air passage 16 Louver 17a Upper inclined surface 17b Upper inclined surface 17c Lower inclined surface 17d Lower inclined surface 17e Inclined surface 18 Drain pan 19a Guide plate 19b Guide plate 20 Corner 21 Rotation direction 22 Rectification direction 23 Drain hole

Claims (10)

It has an internal air duct that takes air from the heating element storage box into the housing, and circulates it back into the heating element storage box, and an outdoor air path that takes outside air and discharges it to the outside air, and transports air from the outside air path. An outside air blower, an inside air blower that conveys air in the inside air air passage, a heat exchange element that is disposed at the intersection of the outside air air passage and the inside air air passage, and exchanges sensible heat between the outside air and the inside air, Is provided with an opening for taking in outside air, and a connecting member for connecting the opening and the suction port of the outside air blower, and the center of the opening is decentered upward from the center of the suction port of the blower. apparatus. 2. The cooling device according to claim 1, further comprising an inclined surface that extends from the opening toward the suction port of the outside air blower on the connection member. The cooling device according to claim 2, wherein the inclined surface is in contact with the upper surface of the suction port of the outside air blower at the lower end. The cooling device according to claim 1, further comprising an inclined surface at the lower part of the connecting member from the opening toward the suction port of the outside air blower. 5. The cooling according to claim 4, wherein a louver is disposed on a front surface of a cover of a heating element storage box in which a cooling device is stored, and the inclined surface provided at a lower portion of the connecting member is parallel to the louver. apparatus. 2. The cooling device according to claim 1, wherein the connecting member has an inclined conical constricting surface from the circumference of the opening toward the circumference of the suction port of the outside air blower. The cooling device according to any one of claims 1 to 6, wherein a guide plate having an inclination is provided on both sides from the bottom surface to the side surface of the cooling device. The cooling device according to claim 7, wherein the guide plate has an arc shape tangent to a bottom surface and both side surfaces of the cooling device. A drain port for drainage disposed between the outside air blower and the bottom surface of the box is provided with a discharge port, and this discharge port discharges along the surface perpendicular to the rotation axis of the outside air blower and in the rotation direction of the outside air blower. The cooling device according to claim 7 or 8, wherein a path is provided as described above. A heating element storage device on which the cooling device according to any one of claims 1 to 9 is mounted.

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