JP2009117631A - Cooling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool a control device in the conventional cooling apparatus, wherein although the control device is installed in a section provided with an inside air duct or an outside air duct, since it has a large calorific value. <P>SOLUTION: Inside a case 1 of the cooling apparatus, an indoor turbo fan 2 and an outdoor turbo fan 3 are arranged, and a heat exchanger 4 is also arranged between the indoor turbo fan 2 and the outdoor turbo fan 3, to perform sensible heat exchange between an inside air and an outside air. A controller box 6 is arranged in a section, where the indoor turbo fan 2 is arranged above the inside air flow inlet 7 of the heat exchanger 4; moreover, the tangential direction of the indoor turbo fan 2 of clockwise rotation is arranged in the same direction as that of the inside air flow inlet 7 of the heat exchanger 4, thereby the controller box 6 is cooled efficiently. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a box structure installed outdoors, and has a heating element such as an electronic component inside, which generates a large amount of heat and requires cooling even in winter, and the performance and life are greatly affected by temperature. In particular, the present invention relates to a cooling device and a cooling method for the control device.

  The recent trend toward higher performance of electronic components and higher density of electronic components relative to the control board has led to a dramatic increase in the amount of heat generated from the control board and the temperature inside the heating element storage box has risen. In order to ensure the operation of electronic parts and the product life, the role of a cooling device to keep them below a certain temperature is important. In addition, air-conditioner systems and the like have been diversified as cooling devices, but from the viewpoint of energy saving, a heat exchange type cooling device is installed on the side of the box storage box as a cooling device for the heating element storage box installed outdoors. Therefore, an air-type heat exchange system that cools the inside air by exchanging heat between the outside air and the air in the box structure (hereinafter referred to as inside air) when the outside air temperature is low is drawing attention.

  2. Description of the Related Art Conventionally, a heating element storage box cooling device that cools this type of box by pneumatic heat exchange is known to be installed on the side of the box (see, for example, Patent Document 1).

  Hereinafter, the configuration of the heating element storage box cooling device will be described with reference to FIGS. 14 and 15.

  As shown in FIG. 14, the heating element storage box cooling apparatus 101 includes an inside air path 110 that takes in and returns air from the heating element storage box to the inside of the case 102, and an outside air path that takes outside air and discharges it to outside air. 111, and has an inside air blower 103 that conveys air in the inside air air passage 110 and an outside air blower 104 that carries air in the outside air air passage 111. Further, a heat exchange element 105 that exchanges sensible heat of the cold outside air and the inside air heated by the heating element through the partition wall between the opposing flows by the forced convection is disposed at the intersection of the two air paths. . In addition, the heating element storage box cooling device 101 includes a control device 106 and a heater 108. The control device 106 includes a printed circuit board 107 on which a microcomputer or the like for controlling the rotation speed of the blower is mounted, and performs control to keep the internal temperature of the heating element storage box constant. The heater 108 is arranged between the inside air blower 103 and the heat exchange element 105 in the inside air passage 110. When the heating element storage box is used at a low temperature in a cold region, the heating element storage box has a function of not operating unless the internal air temperature is not lower than a certain level in order to ensure the performance and quality of the internal electronic components. When the internal temperature is low, the heater 108 operates to raise the internal air temperature by heating the air supplied into the storage box to a certain temperature.

Further, as shown in FIG. 15, the heating element storage box cooling device 101 is attached to the openable door 122 of the heating element storage box 121.
JP 2001-156478 A (FIG. 1) JP-A-6-323593 (FIG. 1) Japanese Utility Model Publication No. 5-8253

  The temperature rise reduction of the control device is largely due to the air cooling effect. However, in such a conventional cooling device, the control device is mounted in the same section where the inside air blower or the outside air blower is arranged. Depending on the arrangement, there is a possibility that the air cooling effect is reduced due to a decrease in the amount of air blown to the control device, and the temperature of the component is increased.

  In addition, there is another member such as a heater in the same section where the control device is arranged, and the ventilation state to the control device is biased by blocking the flow of wind or changing the wind direction, etc. Temperature can rise.

  In addition, the control device stores electronic components that are configured in a control component storage unit box. The control device storage unit box includes a control device storage unit inlet that communicates with a compartment that is increased in pressure by the blower, and a blower. There is an outlet for the control unit housing that communicates with the suction port, ventilates by the pressure difference, cools the internal electronic components, but there is a bias in the ventilation, and there is a possibility that the components that generate the most heat will not be blown efficiently. is there.

  In addition, some control device components must be replaced when they age, but they must be easily removable and attachable.

  In addition, because the heating element storage box cooling device has precision equipment such as electronic equipment inside, it is necessary to prevent water from entering and condensing inside the control device even when installed outdoors. Needless to say.

  The present invention solves such a conventional problem, can efficiently cool the control device, can easily replace the control device components, and even when installed outdoors. An object of the present invention is to provide a cooling device capable of preventing the occurrence of condensation inside the cooling device storage box.

  In order to achieve the above object, the heat exchanger according to the present invention is configured so that the control device housing portion has a tangential direction in the same compartment as the inside air blower in the inside air flow path and the direction in which the inside air blower rotates. The heat exchanger is arranged on the side facing the same direction as the air inflow direction.

  By this means, it is possible to suppress a decrease in the air cooling effect due to a decrease in the amount of air blown to the control device, and to obtain a cooling device that can reduce the temperature rise of the control device components.

  Another means is to attach a printed circuit board having a large calorific value among the components of the control device from the outside of the box to the wall surface of the control device housing portion on the inside air blower side.

  By this means, the wind sent by the inner blower can be directly applied to the printed circuit board having a large calorific value.

  In another means, a space is provided between the printed circuit board and the wall surface of the control device housing box to which the printed circuit board is attached, and cooling air is passed through the back surface of the printed circuit board.

  By this means, it is possible to cool both the front surface and the back surface of the printed circuit board to be cooled.

  In addition, the other means is provided with a control device housing portion inlet that communicates the discharge side section of the inside air blower and the inside of the control device housing portion, and a control device housing portion outlet that communicates the inside air side. The high temperature part of the printed circuit board to be cooled is arranged on the windward side of the partial inflow port.

  By this means, the cooling air can be passed through the control device housing portion, and the printed board high temperature portion can be cooled intensively.

  Further, the other means has one surface that comes into contact with the component that generates the most heat in the printed circuit board, and winds up the two surfaces facing each other perpendicular to the direction of the flow of the wind into the inlet of the control device housing portion. Shaped in a staggered arrangement that is bent with a step so that the leeward side is high and the leeward side is high, and has a number of slits, and the comb shape is shifted by a half cycle so that it does not overlap the leeward and leeward airways Is provided with a printed circuit board heat radiation fin immediately before the inlet of the control device storage section.

  By this means, it is possible to increase the heat radiation area of the high-temperature portion of the printed circuit board to be cooled, and to greatly increase the cooling effect.

  Another means is that the printed circuit board installation part of the control device housing box is provided with an installation base, a slit and a screw fixing part, and the printed circuit board is provided with an insertion part and a screw fixing hole.

  By this means, it is possible to easily attach and detach a printed circuit board that requires replacement work for maintenance without dropping the printed circuit board.

  Further, the printed circuit board protective cover having an opening for ventilating and a guide for guiding the air flow is provided immediately before the heat radiating fin by other means.

  By this means, the printed circuit board can be protected and the high temperature part of the inverter can be locally cooled.

  In addition, the other means includes a printed circuit board cover positioning slit, a fall prevention slit, and a screw fixing portion in the control device storage section box, and the positioning insertion plug and the fall prevention insertion portion in the printed circuit board protection cover. A screw fixing hole is provided.

  This means has a fall prevention function and can be easily positioned, and the printed circuit board cover can be easily attached and detached with a single screw.

  In addition, the other means is provided with a heat insulating material on the inner wall surface of the outdoor side of the control device storage box, and the outer surface of the heating element storage box cooling device that comes into contact with the outside air wall of the control device storage box and the outside air. A space is provided between them.

  By this means, it is possible to completely prevent condensation on the wall surface of the control device.

  In addition, another means is a control device storage box that requires replacement of parts in a narrow space inside, and is provided with a maintenance opening, a slit for fixing the maintenance cover, and a screw fixing part in the vicinity of the replacement part. It is provided with a fixing insertion part and a screw slide slit hole.

  By this means, the screw can be loosened, the cover can be slid to pull out the insertion portion, and the cover can be rotated to easily open and close, and parts can be easily replaced through the maintenance opening even in a narrow space.

  The other means is that the heater is placed in the inside air path so that it is perpendicular to both surfaces of the wall surface of the control device housing portion facing the inside air blower and the main plate of the inside air blower. It is arranged.

  By this means, a cooling device that can be cooled by a heater installed so as to serve as an outer shell of the control device box and a wind direction guide is obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the cooling device reduced in size and densified by increasing the ventilation | flow_flow quantity to the heat generating components which comprise a control apparatus storage part box body and a control apparatus, and cooling effectively can be provided.

  In addition, it is possible to provide a cooling device that has an effect of easily and safely attaching / detaching a control device component that requires component replacement.

  Further, it is possible to provide a cooling device having a structure that prevents dew condensation inside the control device storage unit box.

  The cooling device according to the first aspect of the present invention includes an internal air passage that takes in air from the heating element storage box and circulates back to the heating element storage box, an external air passage that takes in outside air, and exhausts the air outside, and an internal air flow An inside air blower that conveys the air in the road, an outside air blower that carries the air in the outside air path, a sensible heat exchanger that exchanges sensible heat between the air in the inside air path and the air in the outside air path, and an inside air blower And a control device accommodating portion for accommodating a control device for controlling the operation of the outside air blower, and a cooling device that is attached to the heat generating body storage box and cools the inside of the heat generating body storage box. The control device accommodating portion is disposed upstream of the air heater, and the direction of the tangent in the direction in which the air blower rotates is in the same section as the air blower in the air flow path, and the air inflow direction of the sensible heat exchanger Is placed on the side facing the same direction as Inside air blown out from the machine has the effect of cooling efficiently the air smoothly to the control device accommodating unit controller components.

  According to a second aspect of the present invention, there is provided a cooling device in which a printed circuit board having a large calorific value among the components of the control device is attached to the wall surface of the control device housing portion on the inside air blower side from the outside of the box. It has the effect | action that the wind sent by a fan can be directly applied to a printed circuit board, and the cooling effect can be improved.

  According to a third aspect of the present invention, there is provided a space between a printed circuit board and a wall surface of the control device housing box body to which the printed circuit board is attached. It has the effect | action that a cooling effect can be heightened by making it.

  According to a fourth aspect of the present invention, there is provided the cooling device according to claim 4, comprising a control device housing portion inlet that communicates the discharge side section of the inside air blower and the inside of the control device housing portion, and a control device housing portion outlet that communicates the inside air side. The high temperature part of the printed circuit board to be cooled is disposed on the windward side of the inlet of the control device housing part, and has the effect that the high temperature part of the printed circuit board of the control device can be intensively cooled.

  According to a fifth aspect of the present invention, there is provided a cooling device having one surface that comes into contact with a component that generates the most heat in the printed circuit board, and is perpendicular to the inflow direction of the wind to the inlet of the control device housing portion. A staggered surface with a step-up and bent so that the leeward side is lower and the leeward side is higher, and a comb shape is provided with a number of slits, and the comb shape is shifted by a half cycle so that it does not overlap the leeward and leeward airways It is equipped with heat dissipation fins having an arrayed shape immediately before the inlet of the control device storage part, and by increasing the heat dissipation area of the high temperature part of the printed circuit board to be cooled, the cooling effect can be dramatically increased. Have.

  According to a sixth aspect of the present invention, there is provided the cooling device according to the sixth aspect, wherein the printed circuit board installation portion of the control device housing portion box includes an installation table, a slit, and a screw fixing portion, and the printed circuit board includes an insertion portion and a screw fixing hole. In the printed circuit board that needs to be replaced for maintenance, the printed circuit board can be easily attached and detached without dropping.

  According to a seventh aspect of the present invention, there is provided a cooling device including a printed circuit board protective cover having an opening for ventilating and a guide for guiding air blowing immediately before the heat radiating fin. This has the effect of locally cooling the high temperature part of the substrate.

  Further, the cooling device according to claim 8 is provided with a printed circuit board cover positioning slit, a fall prevention slit and a screw fixing portion in the control device housing box, and the positioning insertion portion and the fall prevention are provided in the printed circuit board protection cover. It has an insertion part and a screw fixing hole, has a fall prevention function, can be easily positioned, and can easily attach and detach the printed circuit board cover to one screw.

  The cooling device according to claim 9 is provided with a heat insulating material on the inner wall surface of the outer side of the control device storage unit box, and generates heat that comes into contact with the outside air on the inner wall surface of the control device storage unit box. A space is provided between the outer surfaces of the body storage box cooling device, and condensation on the wall surface of the control device can be completely prevented.

  According to a tenth aspect of the present invention, there is provided a control device storage box that requires replacement of a component in a narrow internal space, and includes a maintenance opening, a slit for fixing a maintenance cover, and a screw fixing portion in the vicinity of the replacement component. The maintenance cover is equipped with a fixing insertion part and a screw slide slit hole.It can be easily opened and closed by loosening the screw, sliding the cover, pulling out the insertion part, and rotating the cover. Even in a narrow space, the parts can be easily replaced through the maintenance opening.

  The cooling device according to claim 11 is perpendicular to both the surfaces of the control device housing portion facing the inside air blower and the main plate of the inside air blower on the back surface of the inside air blower in the inside air air passage. The heater is arranged as described above, and the heater efficiently cools the control device components by serving as a wind direction guide to the control device housing portion without interfering with the ventilation of the inside air blown out by the inside air blower. Have

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

(Embodiment 1)
As shown in FIG. 1, an indoor turbo fan 2 as an indoor air blower is disposed in the upper part of the case 1 in the case 1 of the cooling device, and an outdoor turbo fan 3 as an outdoor air blower is disposed in the lower part of the case 1. In order to exchange sensible heat between the indoor air blown by the indoor turbofan 2 and the outdoor air blown by the outdoor turbofan 3 between the indoor turbofan 2 and the outdoor turbofan 3. The heat exchange element 4 is arranged.

  A printed circuit board 5 and other electronic components as a control device on which a microcomputer for controlling the rotation speed of the indoor turbo fan 2 and the outdoor turbo fan 3 is mounted are accommodated in a controller box 6 as a control device accommodating portion. The controller box 6 is in a section in which the indoor turbo fan 2 is disposed above the internal air flow inlet 7 of the heat exchange element 4, and the tangential direction of the right-turn indoor turbo fan 2 is the heat exchange element 4. It is arranged in the same direction as the inner air flow inlet 7, that is, downward, on the right side of the drawing with respect to the rotation axis of the indoor turbofan 2.

  With the above configuration, most of the air blown out from the indoor turbofan 2 runs along the upper and inner surfaces of the case 1 and the wall surface of the controller box 6 from the upper side to the lower side as viewed from the drawing of the indoor turbofan 2 in FIG. It is ventilated smoothly. That is, most of the air blown out from the indoor turbofan 2 flows from the right side toward the heat exchange element 4 toward the heat exchanging element 4 in the drawing of the indoor turbofan 2 (broken arrow A in the figure). 6 can be cooled.

(Second embodiment)
As shown in FIG. 2, the heater 8 is disposed in the same section as the indoor turbo fan 2 and the controller box 6 and on the back surface of the indoor turbo fan 2 of the case 1. The orientation is perpendicular to the main plate of the indoor turbofan 2 and perpendicular to the wall surface of the controller box 6 facing the indoor turbofan 2 and at a height above the controller box 6.

  With the above configuration, the inside air (broken arrow B in the figure) flowing to the lower heat exchanger at the back of the indoor turbo fan 2 flows in the direction of the controller box along the heater that also serves as a wind direction guide (see FIG. Middle broken arrow C), the cooling air of the controller box can be increased.

(Embodiment 3)
As shown in FIG. 3, the printed circuit board 5 on which a high heat generating component is mounted is placed on the wall surface most exposed to wind in the box constituting the controller box 6, that is, on the surface closest to the indoor turbofan 2. Install from the outside.

  With the configuration described above, it is possible to efficiently blow the printed circuit board 5 and cool the components.

  The printed circuit board shown in the present embodiment is an example, and if there is a member that generates a larger amount of heat than the printed circuit board 5 among the control device components, the same effects can be obtained even if they are replaced. Can do.

(Embodiment 4)
As shown in FIG. 4, the printed circuit board 5 is installed on the wall surface of the controller box 6 from the outside, and a space 9 is provided in a contact portion between the printed circuit board 5 and the controller box 6.

  With the above configuration, the cooling effect can be enhanced by ventilating not only on the front surface but also on the rear surface of the control device component that generates a large amount of heat (dashed arrow D in the figure).

  In addition, the printed circuit board which is a heat generating body shown in this Embodiment is an example, and when a member with a larger calorific value than the printed circuit board 5 is present among the control device components, the same effect can be obtained even if replaced. An effect can be obtained.

(Embodiment 5)
FIG. 5 is a schematic perspective view showing the positional relationship among the indoor turbofan 2, the printed circuit board 5, and the intake port 10 of the controller box 6. FIG. 6 is a schematic perspective view showing the exhaust port 11 of the controller box 6.

  As shown in FIG. 5 and FIG. 6, the air inlet 10 of the controller box 6 as the control device housing portion inlet is in the same section as the air outlet of the indoor turbofan 2, that is, the air blown out from the indoor turbofan 2. Is provided in the vicinity of the printed circuit board 5 installed outside the controller box 6. On the other hand, the exhaust port 11 of the controller box 6 serving as the control device housing portion outlet is provided on the panel 12 on the side of the heating element storage box of the case 1 that serves as the suction side (the indoor side suction port 13) of the indoor turbofan 2. .

  In the above configuration, when the indoor turbofan 2 operates, the suction side, that is, the heating element storage box side, becomes low pressure, and the blowout side, that is, the region where the controller box 6 of the case 1 is placed becomes high pressure. Therefore, heat generated from the printed circuit board 5 placed immediately before the intake port 10 is exhausted from the exhaust port 11 through the intake port 10 and the controller box 6 by the air boosted by the indoor turbofan 2. Therefore, also in the printed circuit board 5, only the vicinity of the inlet 10 can be reliably and intensively cooled. In addition, by changing the shape and arrangement of the air intake port 10, it is possible to limit the place to be cooled intensively.

  The printed circuit board 5 that is a heating element shown in the present embodiment is an example, and when a member having a larger amount of heat generation than the printed circuit board 5 is present in the control device components, the same thing can be done by replacing it. An effect can be obtained.

(Embodiment 6)
FIG. 7 is a shape diagram of the radiating fin, and FIG.

  As shown in FIG. 7, it has a contact surface 14 with a component that generates the most heat in the printed circuit board 5 that is a high heat generating element, and is perpendicular to the inflow direction of the wind (broken arrow E in the figure). Of the two surfaces, the windward surface 15 is low and the windward surface 16 is high so that the windward surface 16 is bent and bent into a comb shape with multiple slits so that the comb shape does not overlap the windward and leeward airways. The iron heat dissipating fins 17 having a staggered arrangement with a half-cycle shift are connected to the printed circuit board as screws as separate members, and the heat dissipating fins 17 are arranged so as to be located immediately before the intake port.

  In the above configuration, if the heat radiation fins 17 are connected to the printed circuit board 5, the heat radiation area is increased, so that the cooling effect of the printed circuit board 5 can be greatly enhanced.

  The iron radiating fin 17 shown in the present embodiment is an example in consideration of material cost and workability. However, when this is made of other materials such as aluminum, the same or higher effect can be obtained. Can do.

  Moreover, since the radiation fin 17 is a structure connected to the printed circuit board 5 as a separate member, it is only necessary to determine the necessity of the member according to the load of the equipment, that is, the temperature rise state. 5 can be shared.

(7 of embodiment)
As shown in FIG. 9, an installation base 18, a slit 19, and a screw fixing portion 20 are provided in the printed board 5 installation portion on the wall surface of the controller box 6, and a positioning insertion portion 21 and a screw fixing hole 22 are provided in the printed board 5. It is a thing.

  In the above configuration, when the printed circuit board 5 is removed, the printed circuit board 5 is placed on the installation base 18, so that the fixing screw 23 is removed and the structure does not easily fall even if the hand is released. When the printed board 5 is placed on the installation base 18, the positioning insertion portion 21 is inserted into the slit 19, and the screw fixing portion 20 and the screw fixing hole 22 are combined and fixed with the fixing screw 23. Installation can be performed easily.

(Embodiment 8)
As shown in FIG. 10, a printed circuit board protective cover 26 having an opening 24 for ventilating and a guide 25 for guiding air blowing is provided immediately before the heat radiating fins 17.

  In the above configuration, the printed circuit board protection cover 26 protects the printed circuit board 5 and opens the air direction of the inside air that is discharged from the indoor turbofan 2 and blown from the upper side to the lower side along the wall surface of the controller box 6 by the guide 25. The local cooling effect can be improved by changing to the 24 side and increasing the amount of air blown to the radiation fins 17.

(9 of embodiment)
As shown in FIG. 11, the controller box 6 includes a positioning slit 27, a fall prevention slit 28, and a screw fixing portion 20, and a positioning insertion portion 30 and a fall prevention insertion portion 31 are provided on the printed circuit board protection cover 26. A screw fixing hole 32 is provided.

  In the above configuration, when the printed circuit board protective cover 26 is removed, since the drop prevention insertion portion 31 is inserted into the fall prevention slit 28, the structure does not easily fall even if the fixing screw 33 is removed and the hand is released. Yes, when the printed circuit board protective cover 26 is attached, after inserting the positioning insertion portion 30 into the positioning slit 27 and determining the mounting position, the positioning slit 27 portion is used as a base point and rotated horizontally to prevent falling. Mounting can be easily performed by inserting the drop-preventing insertion portion 31 into the slit 28, and fixing the screw fixing portion 29 and the screw fixing hole 32 together with the fixing screw 33.

(Embodiment 10)
As shown in FIG. 12, a heat insulating material is provided adjacent to the controller box 6 on the case inner wall surface 34 in contact with the outside air, and a space is provided on the controller box outdoor wall surface 35 and the inner wall surface 34 of the case.

  In the above configuration, the case inner wall surface 34 is provided with the heat insulating material 36 to prevent the condensation on the inner surface of the case due to the temperature difference between the cold air of the outside air and the hot air of the inside air. By ventilating the inside air into the space, the temperature difference between the inside and outside air in the controller box 6 is eliminated to prevent condensation inside the controller box 6, and these double measures are taken to prevent condensation inside the controller box 6. Intrusion can be completely prevented.

(Embodiment 11)
As shown in FIG. 13, the controller box 6 that needs to be replaced in a small internal space is provided with a maintenance opening 37, a maintenance cover fixing slit 38, and a screw fixing portion 39 in the immediate vicinity of the replacement part. A fixing insertion portion 41 and a slide slit hole 42 are provided.

  During maintenance, the fixing screw 43 is loosened, the cover is slid indoors, the fixing insertion part 41 is pulled out from the maintenance cover fixing slit 38, and the cover is rotated 180 degrees horizontally to facilitate the maintenance opening 37. If the maintenance cover 40 is opened, parts can be easily replaced through the maintenance opening 37 even in a narrow space inside the controller box 6.

  The present invention is a box structure that is installed outdoors such as a mobile telephone base station, a simple radio station, etc., and has a heating element such as a communication device inside, and since it generates a large amount of heat, cooling is required even in winter. It is useful for a cooling device for a heating element storage box having a precision device in which temperature, humidity, dust, rainwater, etc. affect performance and life.

Structure diagram of cooling device in Embodiment 1 of the present invention Heater arrangement structure diagram in the second embodiment Printed circuit board arrangement structure diagram in the third embodiment The schematic perspective view which shows the space of the printed circuit board back surface in the same Embodiment 4. The schematic perspective view which shows the positional relationship of the indoor side turbo fan 2 and the inlet 10 of the controller box 6 in Embodiment 5. FIG. The schematic perspective view which shows the exhaust port 11 of the controller box 6 in Embodiment 5 The perspective view which shows the outline of the heat radiating fin in Embodiment 6 The schematic perspective view which shows the outline | summary of the radiation fin installation in Embodiment 6 The schematic perspective view which shows the printed circuit board attachment point in Embodiment 7 Structural diagram of printed circuit board protective cover in the eighth embodiment The schematic perspective view which shows the printed circuit board protective cover attachment point in Embodiment 9 Schematic structure diagram showing a dew condensation countermeasure method in the tenth embodiment Structural diagram of maintenance cover in embodiment 11 Structure of conventional heating element storage box cooling device Installation drawing of conventional heating element storage box cooling device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Indoor side turbo fan 3 Outdoor side turbo fan 4 Heat exchange element 5 Printed circuit board 6 Controller box 7 Inner air flow inlet 8 Heater 9 Space 10 Intake port 11 Exhaust port 12 Panel 13 Indoor side inlet 14 Contact surface 15 Upwind surface 16 Wind surface 17 Radiation fin 18 Installation base 19 Slit 20 Screw fixing part 21 Positioning insertion part 22 Screw fixing hole 23 Fixing screw 24 Opening 25 Guide 26 Printed circuit board protection cover 27 Positioning slit 28 Fall prevention slit 29 Screw fixing part 30 Positioning insertion part 31 Fall prevention insertion part 32 Screw fixing hole 33 Fixing screw 36 Heat insulating material 37 Maintenance opening 38 Maintenance cover fixing slit 39 Screw fixing part 40 Maintenance cover 41 Fixing insertion part 42 Slide slit hole 43 Constant screw

Claims (11)

An internal air passage that takes in air from the heating element storage box and circulates it back to the heating element storage box, an external air passage that takes in outside air and exhausts it to the outside, an internal air blower that conveys air in the internal air air path, and outside air An outside air blower that conveys air in the air path, a sensible heat exchanger that exchanges sensible heat between the air in the inside air air path and the air in the outside air air path, and a control for controlling the operation of the inside air blower and the outside air blower A cooling device that is attached to the heating element storage box and cools the inside of the heating element storage box. The inside air blower is disposed upstream of the sensible heat exchanger and includes the control device storage. The part is arranged in the same section as the inside air blower in the inside air air passage and on the side where the direction of the tangent of the direction in which the inside air blower rotates is the same direction as the air inflow direction of the sensible heat exchanger A heating element storage box cooling device. 2. The heating element storage box cooling device according to claim 1, wherein a printed circuit board having a large calorific value among the components of the control device is attached to the wall surface of the control device accommodating portion on the inside air blower side from the outside of the box. . The heating element storage box cooling device according to claim 1 or 2, wherein a space is provided between a printed circuit board and a wall surface of a control device storage box body to which the printed circuit board is attached. A control device housing portion inlet that communicates the compartment on the discharge side of the inside air blower with the inside of the control device housing portion, and a control device housing portion outlet that communicates the inside air side are provided, and on the windward side of the control device housing portion inlet The heating element storage box cooling device according to any one of claims 1 to 3, wherein a high-temperature portion of a printed circuit board to be cooled is disposed. The printed circuit board has one surface that comes into contact with a component that generates a large amount of heat. The two facing surfaces that are perpendicular to the inflow direction of the wind to the inlet of the control device storage section are lower on the windward side and higher on the leeward side. The printed circuit board heatsink fins are shaped like a comb with a step and bent so as to have a large number of slits and a staggered arrangement in which the comb shape is shifted by a half cycle so that it does not overlap the windward and leeward air passages. The heating element storage box cooling device according to any one of claims 1 to 4, wherein the heating device storage box cooling device is provided immediately before the control device storage portion inlet. The printed circuit board installation part, slit, and screw fixing part are provided on the printed circuit board installation part of the control device housing box, and the printed circuit board is equipped with an insertion part and a screw fixing hole, and has a function that can be easily attached and detached with screws. The heating element storage box cooling device according to any one of claims 1 to 5. The heat generating device according to any one of claims 1 to 6, further comprising a printed circuit board protective cover having an opening for locally ventilating and a guide for guiding the air flow immediately before the printed circuit board radiating fin. Body storage box cooling device. The control device storage box has a printed circuit board cover fixing slit and a screw fixing part, and the printed circuit board cover has an insertion part and a screw fixing hole, and has a function that can be easily attached and detached with screws. The heating element storage box cooling device according to any one of claims 1 to 7. A space is provided between the outdoor side wall surface of the control device storage box and the outer surface of the heating element storage box cooling device that comes into contact with the outside air, and an opening for discharging condensed water generated in the space to the outside of the machine. The heating element storage box cooling apparatus according to claim 1, wherein the heating element storage box cooling apparatus is provided. The control unit storage box that requires replacement of parts in a narrow space inside has a maintenance opening, a slit for fixing the maintenance cover, and a screw fixing part in the immediate vicinity of the replacement part. The heating element storage box cooling device according to claim 1, further comprising a slide slit hole. The heater is arranged in the inside air path so as to be perpendicular to both the wall surface of the control device housing portion facing the inside air blower and the main plate of the inside air blower on the back surface of the inside air blower. The heating element storage box cooling device according to any one of 1 to 10.

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