JP2018056255A - Cooling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling system capable of easily discharging rain water from the cooling system to the outside thereof to thereby improve the reliability.SOLUTION: A cooling system 1 is disposed in the upper part of a housing 2 of a heat generation body for exchanging heat between the inside air and the outer air to cool the inside of the heat generation body housing 2. The cooling system 1 includes: a heat exchanger 24; an inside air inlet port 30; an inside air outlet 14; an outer air inlet port 12; and an outer air outlet 13. The heat exchanger 24 has an outer air channel and an inside air channel therein. The outer air channel communicates between the outer air inlet port 12 and the outer air outlet 13. The downstream side of the outer air channel is inclined downward relative to the horizontal direction.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a cooling device or the like for a heating element storage box that stores a heating element.

  Examples of the heating element include a power conditioner.

  The power conditioner is a substation equipment that is used in a photovoltaic power generation system or the like and converts a direct current into an alternating current.

  Since the power conditioner is an electronic device, the power conditioner is stored in a heating element storage box such as a container in order to reduce the influence from the surrounding environment.

  Since the power conditioner housed in the heating element storage box raises the temperature of the inside air of the heating element storage box due to the heat generation, it is necessary to cool the inside of the container or the like for stable operation of the power conditioner.

  In order to reduce the amount of power used for cooling, heat is exchanged between the inside air of the heating element storage box and the outside air taken into the inside of the cooling device. A cooling device has also been proposed (see, for example, Patent Document 1).

JP 2006-336895 A

  In the conventional cooling device, when rainwater enters the cooling device and further enters the inside of the heating element storage box from the cooling device, the power conditioner as an electronic device may be affected.

  The present invention solves such a problem, and even if rainwater enters the inside of the cooling device, it can be easily discharged to the outside of the cooling device, thereby improving the reliability of the cooling device. The purpose is to provide.

  In order to achieve this object, a cooling device according to an aspect of the present invention is provided at the top of a heating element storage box, and the inside air, which is the air inside the heating element storage box, is exchanged with the outside air. The cooling device includes a heat exchanger, an inside air suction port, an inside air blowout port, an outside air suction port, and an outside air blowout port. The outside air path is in communication with each of the outside air inlet and the outside air outlet, and the downstream side of the outside air path is inclined downward from the horizontal direction toward the downstream. It has a configuration and thereby achieves the intended purpose.

  According to the present invention, the downstream side of the outside air passage inside the heat exchanger is inclined downward from the horizontal direction as it goes downstream, so when the cooling device is operated in rainy weather or the like Rainwater that has entered the outside air passage inside the cooling device together with outside air is discharged from the outside airflow outlet of the heat exchanger to the outside of the heat exchanger.

  As a result, rainwater is less likely to stay in the outside air path, and the risk of rainwater entering the inside of the heating element storage box and affecting the power conditioner as an electronic device can be reduced. A device can be obtained.

The perspective view of the storage chamber which installed the heat generating body storage box and cooling device of Embodiment 1 of this invention Perspective view of the heating element storage box and cooling device Exploded perspective view of the heating element storage box and cooling device (A) Left side internal perspective view of the cooling device, (b) Right side internal perspective view of the cooling device FIG. 4B is a configuration diagram showing the A-A ′ cross section of FIG. Exploded perspective view of the heat exchanger Perspective view of the heat exchanger Configuration diagram showing the flow of the inside air and the outside air

  A cooling device according to an aspect of the present invention is a cooling device that is provided at an upper portion of a heating element storage box and cools the inside air, which is the air inside the heating element storage box, by heat exchange with the outside air. The apparatus includes a heat exchanger, an inside air inlet, an inside air outlet, an outside air inlet, and an outside air outlet, and includes an outside air path and an inside air path inside the heat exchanger, and the outside air path Are communicated with the outside air inlet and the outside air outlet, respectively, and the downstream side of the outside air passage is inclined downward from the horizontal direction toward the downstream.

  Thereby, when operating the cooling device in rainy weather, rainwater that has entered the outside air air passage inside the cooling device together with the outside air is inclined downward from the horizontal direction as the downstream side of the outside air air passage goes downstream, It is discharged from the outside air outlet of the heat exchanger to the outside of the heat exchanger.

  Therefore, it becomes difficult for rainwater to stay in the outside air passage, and it is possible to reduce the possibility of rainwater entering the inside of the heating element storage box and affecting the power conditioner as an electronic device.

  The inside air passage hole guide communicates the inside air suction port and the inside air flow inlet of the heat exchanger. In the inside air passage hole guide, the inside air passage hole guide on the side close to the outside air outlet of the casing. The distance between the lower end of the inside air passage guide near the inside air outlet of the casing and the heat exchanger may be longer than the distance between the lower end and the heat exchanger.

  Thereby, the difference of the pressure loss which has arisen between the some internal air paths inside the heat exchanger 24 can be relieved. As a result, by suppressing the variation in the speed of the inflow airflow to the inside air blower 18 connected to the inside air air passage, the inside air blower 18 can be stably operated for a long time, and the reliability of the cooling device is improved. The effect of doing.

  Further, the upper surface of the heat exchanger may be configured such that the side near the outside air inlet of the casing is lower than the side near the inside air outlet of the casing.

  As a result, when the cooling device is operated in the rain, even if raindrops that have entered the casing together with the outside air fall on the top surface of the heat exchanger and become stagnant water, the top surface of the heat exchanger can Since the side near the outside air inlet of the casing is lower than the side near the outlet, the accumulated water is discharged from the outside air inlet of the casing to the outside of the casing.

  Therefore, since rainwater does not stay in the casing, it is possible to reduce the risk of rainwater entering the heating element storage box and affecting the power conditioner as an electronic device.

  Moreover, you may make it the structure which provides a protrusion part in at least one side of the peripheral part of an external airflow inlet in the upper surface of a heat exchanger.

  As a result, when the cooling device is operated in the rain, even if rain drops that have entered the casing together with the outside air fall on the upper surface of the heat exchanger and become stagnant water, Since there is a protruding portion on at least one side of the peripheral edge portion, it is possible to suppress the staying water from entering the heat exchanger from the outside air flow inlet.

  Therefore, since rainwater does not stay inside the heat exchanger, it is possible to reduce the possibility of rainwater entering the inside of the heating element storage box and affecting the power conditioner as an electronic device.

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

(Embodiment 1)
1 to 4 show an embodiment of the cooling device.

  As shown in FIG. 1, the cooling device 1 is installed in the upper part of the heating element storage box 2. The cooling device 1 and the heating element storage box 2 are installed inside the storage chamber 3. In the heating element storage box 2, a heating element (not shown) such as a power conditioner is stored.

  The interior of the storage chamber 3 is an airtight space surrounded by a floor surface, a ceiling surface, and a wall surface. An air conditioner 6 is configured by the indoor unit 4 installed inside the storage chamber 3 and the outdoor unit 5 installed outside the storage chamber 3.

  The rear surface of the heating element storage box 2 is close to the inner wall surface of the storage chamber 3 substantially in parallel.

  An indoor air inlet 7 is opened in front of the heating element storage box 2, and the air inside the storage chamber 3 is sucked into the heating element storage box 2.

  As shown in FIGS. 2 and 3, a plurality of casings 11 of the cooling device 1 are provided on the upper surface of the heating element storage box 2 via the chamber member 8 (three on the left side and one on the right side in this embodiment, a total of four). ), And is provided so as to protrude from the front surface of the heating element storage box 2. The chamber member 8 is provided with openings corresponding to the number of casings 11 (in the present embodiment, three on the left side and one on the right side, four in total) as the inside air passage holes 9.

  4A is an internal perspective view of the cooling device 1 as viewed from the upper right side when viewed from the inside air blower 18 side, and FIG. 4B is an internal perspective view from the upper left side when viewed from the outside air blower 19 side.

  As shown in FIG. 4, the cooling device 1 has a heat exchanger 24, an inside air blower 18, and an outside air blower 19 inside the casing 11.

  Inside the casing 11, an inside air section 16 is provided between the heat exchanger 24 and the inside air blower 18, and an outside air section 17 is provided between the heat exchanger 24 and the outside air blower 19.

  When providing the inside air blower 18 in the cooling device 1, the inside air blower chamber 18b partitioned by the inside air blower partition plate 18a may be configured.

  When the outside air blower 19 is provided, the outside air blower chamber 19d partitioned by the outside air blower partition plate 19a including the first plate portion 19b and the second plate portion 19c may be configured. In this case, the outside air blower partition plate 19 a becomes a part of the casing 11.

  Two outside air blowers 19 may be provided in the outside air blower chamber 19 d, and the air paths of the two outside air blowers 19 may be configured by the outside air blowway partition plate 28.

  An outside air inlet 12 is provided above the rear surface of the casing 11, and an outside air outlet 13 is provided below the rear surface of the casing 11 of the outside air blower chamber 19d.

  An inside air inlet 30 is opened in a portion corresponding to the lower portion of the heat exchanger 24 on the lower surface of the casing 11.

  An inside air outlet 14 is opened on the lower surface of the casing 11 protruding from the front surface of the heating element storage box 2.

  FIG. 5 is a configuration diagram showing a cross section of the A-A ′ portion of FIG.

  As shown in FIG. 5, a heat exchanger 24 is provided inside the casing 11. The heat exchanger 24 has an external airflow inlet 51, an external airflow outlet 52, an internal airflow inlet 53, and an internal airflow outlet 54.

  As shown in FIG. 6, the heat exchanger 24 includes a rectangular second synthetic resin plate 56 on the surface of a first synthetic resin plate 55 and a second plate. A third plate 57 made of synthetic resin is formed on the surface of the body 56, and a fourth plate 58 made of synthetic resin is formed on the surface of the third plate 57 (hereinafter, a plurality of plate bodies in the same manner. 7) are polymerized as shown in FIG. 7 in a state of being separated at predetermined intervals.

  Although not shown, on the surfaces of the first plate body 55, the second plate body 56, the third plate body 57, and the fourth plate body 58, there are respectively a plurality of rectifying walls that partition the surfaces into lanes. Provided. The 1st board 55, the 2nd board 56, the 3rd board 57, and the 4th board 58 are the rectangles which made the left-right direction long. On the surface of the fourth plate body 58, the rectifying wall is curved and extended in the middle from one end of the plate body serving as the external airflow inlet 51 to the other end side serving as the external airflow outlet 52. On the surface of the third plate 57, the rectifying wall is curved and extended midway from one end of the plate that becomes the inner airflow inlet 53 to the other end that becomes the inner airflow outlet 54. By laminating plate bodies having such rectifying walls, a plurality of substantially L-shaped air lanes can be formed on the plate body. According to such a heat exchanger 24, the outside air flow path that communicates the external air flow inlet 51 and the external air flow outlet 52 and the internal air flow path that communicates the internal air flow inlet 53 and the internal air flow outlet 54 sandwich the plate body therebetween. The structure which adjoins alternately can be obtained. In FIG. 6, the outside air path is indicated by a broken line arrow, and the inside air path is indicated by a solid line arrow.

  With such a configuration, in the heat exchanger 24, the internal air path and the external air path are alternately adjacent to each other through the plate body inside the heat exchanger 24, so that the internal air and the external air are not in direct contact with each other. Heat exchange can be performed between the inside air and the outside air via the plate. That is, the heat exchanger 24 transfers the heat of the inside of the heating element storage box to the inside of the storage room without air circulation between the inside air of the heating element storage box and the outdoor outside air taken into the cooling device. It is a laminated sensible heat exchanger that has an effect of radiating heat to outside outdoor air.

  As shown in FIG. 7, an external air flow inlet 51 is formed on the upper surface side of the heat exchanger 24 in which a plurality of plates are superposed, and is sucked into the casing 11 via the external air suction port 12. The outside air flows from the outside air flow inlet 51 into the heat exchanger 24. The air that has flowed into the heat exchanger 24 flows out into the outside air compartment 17 from the outside air outlet 52 shown on the lower right side of FIG. The outside air outlet 52 communicates with the outside air outlet 13 via the outside air section 17 and the outside air blower 19.

  As shown in FIG. 7, a protrusion 42 is provided at the boundary between the upper surface of the heat exchanger 24 and the peripheral edge of the external airflow inlet 51. The protruding portion 42 is a member obtained by bending one end side of the long side of the plate-like member that is long in the stacking direction of the plates on the upper surface of the heat exchanger 24 in the upper direction of the casing 11.

  In the above configuration, the cooling action of the cooling device 1 will be described with reference to FIG.

  Inside the heating element storage box 2, heat is generated when a heating element such as a power conditioner (not shown) is activated. The air heated by the heat generation flows into the chamber member 8 from the internal airflow outlet 10 of the heating element storage box 2 by the action of the storage box blower 71 or the internal air blower 18. When the storage box blower 71 is provided, the storage box blower 71 is connected to the internal airflow outlet 10 of the heating element storage box 2.

  The air spread and rectified in the horizontal direction in the chamber member 8 flows into the heat exchanger 24 of the casing 11 from the inside air passage hole guide 41 inserted into the inside air passage hole 9.

  The inside air that has flowed into the heat exchanger 24 passes through the inside air passage adjacent to the outside air passage, and is cooled by the outside air having a temperature lower than that of the inside air. The cooled inside air passes through the inside air section 16, is sucked into the inside air blower 18, changes direction by 90 degrees, and is blown out vertically downward. The flow of the inside air is indicated by a thick solid arrow in FIG.

  At this time, since the indoor air inlet 7 of the heating element storage box 2 is provided below the front surface of the heating element storage box 2, it is blown downward from the inside air outlet 14 along the front surface of the heating element storage box 2. In addition, the cooled air can be supplied to the indoor air suction port 7 through the shortest path.

  That is, since the air cooled by the cooling device 1 can be supplied almost directly to the heating element storage box 2 even if the air temperature in the storage chamber 3 is slightly high, the set temperature of the air conditioner 6 can be increased, and an energy saving effect is created. it can.

  Next, as shown in FIG. 8, the outside air is sucked into the outside air inlet 12 by the action of the outside air blower 19. The sucked outside air passes through the heat exchanger 24 as indicated by a thick broken line arrow shown in FIG. 8, and is heated by the high-temperature inside air as compared with the outside air. The heated outside air is sucked into the outside air blower 19, turned 90 degrees, blown out vertically downward, and discharged from the outside air outlet 13 to the outside of the storage chamber 3.

  That is, the heat exchanger 24 exchanges heat between the inside air and the outside air because the inside air passage and the outside air passage are alternately adjacent to each other through the plate body inside the heat exchanger 24, and stores the heating element. It is a laminated type sensible heat exchanger which shows the effect | action which dissipates the heat | fever of the inside air of a box to the outdoor outdoor air outside a storage chamber.

  Next, the characteristic part of this embodiment is demonstrated using FIGS. 5-8.

  6 and 7, the outside air enters the heat exchanger 24 from the outside air flow inlet 51 and is discharged from the outside air outlet 52. When the outdoor weather is rainy, rain water may enter the heat exchanger 24 together with outside air. In the present embodiment, as shown in FIG. 8, the downstream side of the outdoor air passage is inclined downward from the horizontal direction as it goes downstream, so that rainwater that has entered the heat exchanger 24 is also removed. The heat exchanger 24 moves to the outside air outlet 52 side by the dead weight of rain water inside the outside air wind path. Further, since the outside air flows from the outside air flow inlet 51 to the outside air flow outlet 52 in the outside air passage, the effect of the rain air entering the heat exchanger 24 is also obtained by the action of the air flow.

  Rainwater discharged from the outside airflow outlet 52 is sucked together with outside air by the action of the outside air blower 19 and is discharged outside the room. Alternatively, rainwater discharged from the outside air outlet 52 may be temporarily stored in the bottom of the outside air section 17 and discharged outside the room by opening and closing a drain (not shown).

  Such a configuration makes it difficult for rainwater to stay in the outside air passage, and reduces the possibility that the accumulated rainwater may enter the inside of the heating element storage box and affect the power conditioner as an electronic device. it can.

  In the cooling device that exchanges heat between the inside air of the heating element storage box and the outside outside air taken into the cooling device, the possibility of taking rainwater into the outside air passage cannot be excluded. As shown in the figure, a structure that does not allow rainwater entering the outside air passage to enter the inside of the heating element storage box can achieve a high effect for improving the reliability of the cooling device.

  5 and 8, the inside air passage hole guide 41 has an outer peripheral shape similar to the inside air passage hole 9. When installing the cooling device 1 in the upper part of the chamber member 8, the inside air passage hole guide 41 is inserted into the inside air passage hole 9, and communicates the inside air flow inlet 53 of the heat exchanger 24 and the space inside the chamber member 8. It is. The distance between the lower end of the inside air passage hole guide 41 and the heat exchanger 24 is longer on the side near the inside air outlet 14 of the casing 11 than on the side near the outside air outlet 13 of the casing 11. The pressure loss when passing through the side near the inside air outlet 14 of the casing 11 is larger than the pressure loss when the inside air passes through the side close to.

  In addition, as shown in FIG. 6, a plurality of internal air paths are formed on the surface of the third plate body 57, each of which is arranged in parallel by a rectifying wall. The plurality of inside air paths have different lengths depending on the inflow position at the inside air inlet 53. The internal air flow path that flows in from the side close to the internal air outlet 14 at the internal air flow inlet 53 has a shorter length than the internal air flow path that flows from the side close to the external air outlet 13 at the internal air flow inlet 53. Pressure loss is also small. The difference in the lengths of the plurality of inside air paths is the same in the first plate 55, and the length of the inside air path is the same as long as the same shape plate forms a plurality of inside air paths. There is a difference.

  Within the heat exchanger 24, there is a difference in length among the plurality of internal air passages, so that a difference in pressure loss occurs between the plurality of internal air passages.

  In such a configuration, the inside air passage hole guide closer to the inside air outlet 14 of the casing 11 than the distance between the lower end of the inside air passage hole guide 41 near the outside air outlet 13 of the casing 11 and the heat exchanger 24. By installing the inside air passage hole guide 41 having a longer distance between the lower end of the heat exchanger 41 and the heat exchanger 24 to the inside air flow inlet 53 of the heat exchanger 24, a plurality of inside air winds are formed inside the heat exchanger 24. The difference in pressure loss occurring between the paths can be mitigated.

  That is, the internal air flow path that flows in from the side close to the internal air outlet 14 in the internal air flow inlet 53 is shorter than the other internal air flow paths, but the upstream side thereof is relatively closer to the side close to the internal air outlet 14 of the casing 11. On the other hand, the inside air passage that passes through the long inside air passage guide 41 and flows in from the side near the outside air outlet 13 in the inside air inlet 53 is longer than the other inside air passages, but in the upstream, the casing 11 passes through a relatively short inside air passage hole guide 41 on the side close to the outside air outlet 13.

  As described above, in the inside air passage hole guide 41, by changing the distance between the lower end of the inside air passage hole guide 41 and the heat exchanger 24, the difference in pressure loss generated between the plurality of inside air wind paths can be reduced. Is.

  Reducing the difference in pressure loss between the plurality of internal air passages leads to suppression of variation in the speed of the inflow air flow into the internal air blower 18 connected to the internal air blow passage, and as a result, the internal air blower 18 is stabilized. The reliability of the cooling device can be improved.

  In FIG. 5, the upper surface of the heat exchanger 24 is lower on the side of the casing 11 near the outside air inlet 12 than on the side of the casing 11 near the inside air outlet 14. When the outdoor weather is rainy, the rainwater dripped on the top surface of the heat exchanger 24 moves to the outside air inlet 12 side due to its own weight because the top surface of the heat exchanger 24 is inclined. It becomes difficult to stay on the upper surface of the heat exchanger 24.

  With such a configuration, rainwater is less likely to stay on the upper surface of the heat exchanger 24, and the possibility that the accumulated rainwater enters the inside of the heating element storage box and affects the power conditioner as an electronic device is reduced. Can do.

  In FIG. 7, a protrusion 42 is provided at the boundary portion of the external air flow inlet 51 on the upper surface of the heat exchanger 24. When the outdoor weather is rainy, the rainwater dropped and staying on the upper surface of the heat exchanger 24 flows from the outside air inlet 12 to the outside air inlet 51. There is a possibility that the upper surface of the container 24 moves to the external airflow inlet 51 side. In the structure of the present embodiment, since the projecting portion 42 is bent from the upper surface of the heat exchanger 24 toward the upper portion of the casing 11, the rainwater dripped and retained on the upper surface of the heat exchanger 24 is outside air flow inlet. Intrusion into the heat exchanger 24 from 51 can be suppressed.

  In the present embodiment, the casing 11 of the cooling device 1 is installed on the upper surface of the heating element storage box 2 via the chamber member 8, but the heating element storage box 2 is not connected via the chamber member 8. The cooling device 1 may be installed on the upper surface, and the same effect can be obtained if the installation method is such that the inside air of the heating element storage box 2 is sucked into the cooling device 1.

  In the present embodiment, the projecting portion 42 is a member obtained by bending the plate member heat from the upper surface of the heat exchanger 24 toward the upper portion of the casing 11, but is not limited to this shape. The same effect can be obtained as long as the shape shows an action that suppresses the staying water on the upper surface of the exchanger from entering the heat exchanger.

  In the present embodiment, the protrusion 42 is provided on the upper surface of the heat exchanger 24 at a portion corresponding to the boundary portion of the external air flow inlet 51. However, the present invention is not limited to this position. Providing the protrusions 42 on the other sides of the peripheral edge can further suppress the intrusion of rainwater from the external airflow inlet 51 into the heat exchanger 24.

  The configuration described in the embodiment is merely an example, and the storage chamber 3, the air conditioner 6, the chamber member 8, the inside air blower 18, the outside air blower 19, the storage box blower 71, and the like are not essential configurations. .

  Further, a reinforcing part for reinforcing the chamber member 8 may be provided on the inner upper surface of the chamber member 8.

  As shown in FIG. 3, the chamber member 8 is provided with a removable cover at a portion corresponding to the upper portion of the storage box blower 71, but the configuration is not limited to this. The storage box blower 71 may be provided not inside the chamber member 8 but inside the heating element storage box 2.

  In addition, since the invention of the embodiment relates to the cooling device 1 that cools the heating element storage box 2, the heating element storage box 2 itself may not be included in the configuration of the cooling device 1.

  The cooling device according to the present invention is useful as a cooling device with improved reliability.

DESCRIPTION OF SYMBOLS 1 Cooling device 2 Heat generating body storage box 3 Storage room 4 Indoor unit 5 Outdoor unit 6 Air conditioner 7 Indoor air inlet 8 Chamber member 9 Inside air passage hole 10 Inside air outlet 11 Casing 12 Outside air inlet 13 Outside air outlet 14 Inside air outlet 16 Inside air compartment 17 Outside air compartment 18 Inside air blower 18a Inside air blower partition plate 18b Inside air blower chamber 19 Outside air blower 19a Outside air blower partition plate 19b First plate portion 19c Second plate portion 19d Outside air blower chamber 24 Heat exchanger 28 Outside air passage partition plate 30 Inside Air Suction Port 41 Inside Air Passing Hole Guide 42 Projection 51 External Air Flow Inlet 52 External Air Flow Outlet 53 Internal Air Flow Inlet 54 Internal Air Flow Outlet 55 First Plate Body 56 Second Plate Body 57 Third Plate Body 58 Fourth Plate 71 Storage box blower

Claims (4)

A cooling device that is provided at an upper portion of the heating element storage box and cools the inside air, which is the air inside the heating element storage box, by heat exchange with the outside air,
The cooling device includes a casing, a heat exchanger, an inside air inlet, an inside air outlet, an outside air inlet, and an outside air outlet,
Inside the heat exchanger, provided with an outside air path and an inside air path,
The outside air air passage communicates with the outside air inlet and the outside air outlet,
The cooling device according to claim 1, wherein the downstream side of the outside air passage is inclined downward from the horizontal direction toward the downstream. An inside air passage hole guide communicating the inside air inlet and the inside air flow inlet of the heat exchanger;
In the inside air passage hole guide, the inside air passage hole closer to the inside air outlet of the casing than the distance between the lower end of the inside air passage hole guide near the outside air outlet and the heat exchanger of the casing. The cooling device according to claim 1, wherein a distance between a lower end of the guide and the heat exchanger is longer.   3. The cooling device according to claim 1, wherein an upper surface of the heat exchanger is lower on a side near the outside air inlet of the casing than on a side near the inside air outlet of the casing.   The cooling device according to any one of claims 1 to 3, wherein a protrusion is provided on at least one side of the peripheral edge of the external airflow inlet on the upper surface of the heat exchanger.