JP2006052874A - Cooling system - Google Patents

Abstract

[PROBLEMS] A multi-layer heat exchanger with a large total heat transfer area can be arranged, the partition structure of the internal and external ventilation passages is simplified, the heat exchange rate is high, high capacity can be demonstrated, and assembly and manufacturability are good. Provided is a heating element storage box cooling device that can easily ensure airtightness.
The heating element storage box cooling device includes an internal air ventilation path for sucking air in a storage box in which a heating element is installed, and then blowing the air into the storage box to circulate the air in the storage box. An outside air ventilation path that sucks outside air and then discharges it to the outside again, a partition plate that is installed so that these both ventilation paths are independent, a blower that feeds air in the storage box and outside air, and an inside air ventilation path, In a heating element housing box cooling device provided with a laminated heat exchanger that is arranged at the intersection of the outside air ventilation path and exchanges heat between the outside air and the air in the housing box, the rotation shafts of both fans and the lamination heat exchanger are laminated It arrange | positions so that a direction may orthogonally cross.
[Selection] Figure 2

Description

  The present invention relates to a cooling device, and more particularly to a cooling device having an improved structure by cooling indoor air in which a heating element such as an electronic component housed therein is accommodated.

  In general, as the performance and density of electronic components increases, the amount of heat generated from the control board increases dramatically, and the temperature in the room that houses the electronic components and control board rises. It has been practiced to cool the room temperature below a certain level to guarantee the operation of electronic parts and the like and extend the product life (Patent Document 1).

  As shown in FIG. 8, the cooling device 51 described in Patent Document 1 sucks indoor air from an indoor air inlet 53 provided in the cooling device main body 52 and then blows out the indoor air again from the indoor air outlet 54. The outside air ventilation path 55 for circulating the air, the outside air ventilation path 58 for discharging the outside air sucked from the outside air suction port 56 to the outside air again from the outside air outlet 57, and the both ventilation paths 55, 58 are installed independently. A plurality of partition plates 59 having a large area and a small area with openings formed therein, and a laminated heat exchanger 60 that is disposed at the intersection of the inside air ventilation path 55 and the outside air ventilation path 58 and exchanges heat between the outside air and the room air. And the blowers 61 and 62 for sending indoor air and outdoor air, respectively, and the stacking direction of the heat exchanger 60 is parallel to the rotating shaft 63 of the blowers 61 and 62 and orthogonal to the indoor air blowing direction. Arranged so that That.

However, such a cooling device 51 described in Patent Document 1 has a high ventilation resistance due to the complicated shape of the ventilation path, it is difficult to ensure the necessary air volume, and further, the assembly and manufacturability are poor, and the airtightness is low. It is difficult to secure. Further, when a heat exchanger having a structure in which normally used corrugated square plates are laminated is arranged, the cooling device 51 is often limited in depth and width, and the total heat transfer area of the laminated heat exchanger 59 is limited. There is a problem that cannot be increased.
JP 2001-156478 A

  In view of the above circumstances, the present invention can arrange a stacked heat exchanger with a large total heat transfer area, the partition configuration of the internal and external ventilation passages is simple, the heat exchange rate is high, high capacity can be exhibited, assembly, It is an object of the present invention to provide a cooling device with good manufacturability and easy airtightness.

  In order to achieve the above-described object, the cooling device according to the present invention, after sucking in indoor air, blows out again into the room and circulates the room air, and outside air that sucks in outside air and then discharges it to the outside air again. Ventilation path, partition plate installed so that these two ventilation paths are independent, a blower for sending room air and outside air, and heat of outside air and room air arranged at the intersection of inside air ventilation path and outside air ventilation path In the cooling device including the laminated heat exchanger for exchanging the heat exchanger, the rotating shafts of the two fans and the lamination direction of the laminated heat exchanger are arranged so as to be orthogonal to each other.

  According to the cooling device of the present invention, it is possible to arrange a stacked heat exchanger having a large total heat transfer area, the partition configuration between the indoor air and the outside ventilation path is simplified, the heat exchange rate is high, and the high capacity is achieved. It is possible to provide a cooling device that can be exhibited, has good assembly and manufacturability, and can easily ensure airtightness.

  Hereinafter, a cooling device according to a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a conceptual diagram showing a usage state of the cooling device according to the first embodiment of the present invention, and FIG. 2 is a conceptual diagram of the cooling device according to the first embodiment.

  As shown in FIG. 1, the cooling device 1 according to the first embodiment is used by being air-conditioned by, for example, an air conditioner A and attached to a housing C in which a heating element B such as an electronic component or a control board is housed. After the indoor air (hereinafter simply referred to as “inside air”) is sucked in, it is cooled by exchanging heat with the outside air serving as a cooling heat source, blown out again into the room, and the inside air is circulated.

  As shown in FIGS. 1 and 2, the cooling device 1 according to the first embodiment has a flat rectangular cooling device body 2 having a wide lateral width and a small depth. The plane is provided with an inside air inlet 31 for sucking in the inside air and an inside air outlet 32 that blows out again into the room. The two ports 31, 32 are connected between the two ports 31, 32 to circulate the inside air. An inside air ventilation path 3 is provided. On the other hand, an outside air inlet 41 for sucking outside air and an outside air outlet 42 for blowing outside air again are provided on the other side wide plane of the cooling device main body 2. An outside air ventilation path 4 is provided for communicating 42 and circulating outside air.

  Further, in the cooling device main body 2, a plurality of partition plates 5 for separating the inside air ventilation path 3 and the outside air ventilation path 4 independently and partitioning them in a substantially airtight state are provided. An inside air blower 33 for inside air ventilation is arranged, and an outside air blower 43 for outside air ventilation is arranged in the outside air ventilation path 4. The inside air ventilation path 3 and the outside air ventilation path 4 are defined by the wall surface of the cooling device body 2, the partition plate 5, and a laminated heat exchanger 6 described later, and the partition configuration of the both ventilation paths 3 and 4 is simplified. It is easy to ensure airtightness. In addition, since all the partition plates 5 are not perforated, and are made of a plate material having a small depth (width) and a short length similar to those of the cooling device main body 2 having a small depth and a small area, Good assembly and manufacturability.

  Furthermore, a laminated heat exchanger 6 for exchanging heat between the outside air and the inside air is disposed at the intersection of the inside air ventilation path 3 and the outside air ventilation path 4.

  For the inside air blower 33 and the outside air blower 43, for example, sirocco fans 33a and 43a for blowing out air sucked from the axial direction in the radial direction are used. These sirocco fans 33a and 43a are arranged in the longitudinal direction of the cooling device body 2. The rotating shaft 7 is attached to both ends of the rotating shaft 7 and is rotated by a single drive motor 8 attached to the center of the rotating shaft 7.

  Moreover, as shown in FIG. 3, the laminated heat exchanger 6 is, for example, a corrugated plate fin heat exchanger, and has a square shape, both of which are square and have a corrugated plate 6a that flows along the inside air, and the outside air flows along the outside. The corrugated plate 6b is formed by being laminated via the separation plate 6c so that the corrugations are orthogonal.

  As shown in FIG. 2, the laminated heat exchanger 6 disposed at the intersection of the inside air ventilation path 3 and the outside air ventilation path 4 has the lamination direction, that is, the lamination direction of the corrugated plates 6a and 6b, 43, the vertical angle of the square is upward, and as shown by the white arrow in the figure, the inside air flows from one side inclined from the vertical angle, and from the opposite side. On the other hand, as indicated by a black arrow, outside air flows from the other side inclined from the apex angle and flows out from the opposite side. The stacked heat exchanger 6 is disposed so that the stacking direction thereof is orthogonal to the rotation axis 7, that is, the plane of the corrugated plates 6a and 6b is parallel to the wide plane of the flat rectangular cooling device main body 2, and in the longitudinal direction. As a result, the corrugated plates 6a and 6b can be increased in surface area, and as a result, compared to a conventional heat exchanger of a cooling device that is restricted by the flat rectangular cooling device main body. Thus, the total heat transfer area of the heat exchanger can be increased.

  As shown in FIGS. 1 and 2, according to the cooling device of the first embodiment having the above-described structure, when the outside air is lower than the inside air temperature by a predetermined temperature, the temperature of the room in which the heating element B is installed is high. The inside air is sucked from the inside air inlet 31 and reaches the stacked heat exchanger 6 via the inside air ventilation path 3, while the relatively low temperature outside air sucked from the outside air inlet 41 is stacked via the outside air ventilation path 4. The internal air and the external air exchange heat, and the high-temperature internal air is deprived of heat by the low-temperature external air to become a low temperature, and again through the internal air outlet 32, the internal air ventilation path 3, and the internal air blower 33 The air is blown into the room to lower the indoor air temperature. On the other hand, the outside air that has been deprived of heat from the high-temperature inside air and becomes a high temperature is blown out again into the outside air through the outside-air ventilation path 4, the outside-air outlet 42, and the outside-air blower 43.

  In such a heat exchange process between the inside air and the outside air, since the total heat transfer area of the laminated heat exchanger 6 is large, the heat exchange rate becomes high and high performance can be exhibited.

  As described above, according to the cooling device of the first embodiment, it is possible to arrange a stacked heat exchanger having a large total heat transfer area, the partition configuration of the internal and external ventilation passages is simplified, and the heat exchange rate is high. High performance can be demonstrated, assembly and manufacturability are good, and airtightness can be easily secured.

  Next, a second embodiment of the cooling device according to the present invention will be described.

  While the first embodiment is a normal operation in which heat is exchanged between the outside air and the inside air in the laminated heat exchanger, the second embodiment is a normal operation, and the outside air introduced from the outside air inlet and the laminated heat exchange. It is possible to switch between supply air operation that mixes the inside air that has passed through the vessel and supplies it to the room.

  For example, as shown in FIG. 4 and FIG. 5, the cooling device 11 of the second embodiment includes an outside air inlet 41 provided on a narrow side plane of the cooling device main body 2 and the vicinity of the outside air inlet 41. The outside air introduction port 10 provided in the middle of the inside air ventilation path 3 so as to introduce the outside air directly into the inside air ventilation path 4, and a switching damper that selectively opens and closes the outside air introduction port 10 and the outside air suction port 41 12, and a blower control device 13 that controls driving of the inside air blower 33 and the outside air blower 43, an inside air temperature detecting means 34 that is provided in the inside air ventilation path 3 and detects outside air temperature, and detects outside air temperature. An outside air temperature detecting means 44 is provided, and the blower control device 12 and the outside air temperature detecting means 44 are installed between the outside air inlet 41 in the outside air ventilation path 4 and the laminated heat exchanger 6. Further, the outside air outlet 42 is provided at the bottom of the cooling device main body 2, and the inside air ventilation path 3 and the outside air ventilation path 4 include a wall surface of the cooling device body 2, a single partition plate 5 having a small area, and a laminated type. It is defined by the heat exchanger 6, the partition structure is simple, airtightness is easily ensured, and assembly and manufacturability are also good.

  Therefore, in the normal operation state where the cooling device 11 exchanges heat between the outside air and the inside air (the state shown in FIG. 4), the inside air temperature detected by the inside air temperature detecting means 34 is equal to or higher than a preset temperature, and the outside air temperature is equal to the inside air temperature. On the other hand, when the temperature is lower than a predetermined temperature, the switching damper 12 opens the outside air inlet 10, closes the outside air inlet 41, and the outside air introduced from the outside air inlet 10 and the inside air that has passed through the stacked heat exchanger 6. Are switched to an air supply operation in which the air is mixed and supplied to the room (state shown in FIG. 5).

  This makes it possible to switch between the air supply operation and the normal operation when the indoor temperature becomes an abnormally high temperature. Also, by closing the outdoor suction port during the air supply operation and suppressing the amount of outside air blown, the power consumption of the blower can be reduced compared to the case where the air supply operation is performed with the outdoor suction port open, and energy saving is achieved. Since the other configuration is not different from the cooling device shown in FIG.

  In addition, a third embodiment of the cooling device according to the present invention will be described.

  While the second embodiment completely closes the outside air suction port by the switching damper during the air supply operation, the third embodiment slightly opens the outside air suction port so that the blower control device and the outside air temperature detection are performed. Focus on the outside air.

  For example, as shown in FIG. 6, in the cooling device 21 of the third embodiment, during normal operation, the switching damper 12 closes the outside air inlet 10 and completely opens the outside air inlet 41. Further, during the air supply operation, as shown in FIG. 7, the switching damper 12 opens the outside air inlet 10 and at the same time partially opens the outside air inlet 41 (mostly closes and opens a small area), and the blower control device 13. In addition, the outside air temperature detecting means 44 can be ventilated so that the outside air hits it. Thereby, during the air supply operation, the control board temperature rise of the blower control device can be suppressed, reliability can be ensured, and the outside air is also passed through the outside air temperature detecting means, so that the outside air temperature can always be accurately detected.

The conceptual diagram which shows the use condition of the cooling device which concerns on 1st Embodiment of this invention. The conceptual diagram of the cooling device which concerns on 1st Embodiment of this invention. The perspective view of the lamination type heat exchanger used for the cooling device concerning a 1st embodiment of the present invention. The conceptual diagram of the cooling device which concerns on 2nd Embodiment of this invention. The conceptual diagram of the cooling device which concerns on 2nd Embodiment of this invention. The conceptual diagram of the cooling device which concerns on 3rd Embodiment of this invention. The conceptual diagram of the cooling device which concerns on 3rd Embodiment of this invention. The conceptual diagram of the conventional cooling device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cooling device, 2 ... Cooling device main body, 3 ... Inside air ventilation path, 31 ... Inside air inlet, 32 ... Inside air blower, 33 ... Inside air blower, 4 ... Outside air ventilation path, 41 ... Outside air inlet, 42 ... Outside air blowing Outlet, 43 ... Outside air blower, 5 ... Partition plate, 6 ... Laminated heat exchanger, 7 ... Rotating shaft, 8 ... Drive motor.

Claims (3)

It was installed so that the inside air ventilation path that circulates the room air after sucking the room air and circulates the room air, the outside air ventilation path that sucks the outside air outside and then exhausts it to the outside air, and these both ventilation paths are independent. In a cooling device comprising a partition plate, a blower that sends indoor air and outside air, and a stacked heat exchanger that is disposed at the intersection of the inside air ventilation path and the outside air ventilation path and exchanges heat of the outside air and the room air, The cooling apparatus characterized by arrange | positioning so that the rotating shaft of both said air blowers and the lamination direction of the said laminated heat exchanger may be orthogonally crossed. A blower control device for controlling the blower, an indoor air temperature detecting means for detecting the indoor air temperature, an outdoor air temperature detecting means for detecting the outdoor air temperature, and an internal air ventilation path so as to introduce the outside air directly into the indoor air ventilation path. An outside air inlet provided in the vicinity of the outside air inlet, and a switching damper that selectively opens and closes the outside air inlet and the outside air inlet, and closes the outside air inlet, A normal operation in which heat is exchanged between outside air and room air in the stacked heat exchanger, and the room air detected by the temperature detecting means is equal to or higher than a preset temperature, and the outside air temperature is higher than the room air temperature. When the temperature is lower than a predetermined temperature, the outside air inlet is opened, the outside air inlet is closed, and the outside air introduced from the outside air inlet is mixed with the room air that has passed through the stacked heat exchanger. The cooling device according to claim 1, characterized in that to enable switching between air supply operation supplies within. The blower control device and the outside air temperature detection means are installed between the outside air inlet and the stacked heat exchanger in the outside air ventilation path, and the outside damper is opened by the switching damper during the air supply operation. 3. The cooling device according to claim 2, wherein at the same time, a part of the outside air inlet is opened to allow outside air to flow through the blower control device and the outside air temperature detecting means.

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