JPH09264679A - Temperature control device in housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a temperature within a housing at an optimum condition by preventing lowering of a circulating flow amount of an inner liquid thus preventing lowering of a radiating performance, wherein, in the housing, a heating device is disposed downstream of a heat exchanger in a flow direction of an inner fluid. SOLUTION: A hermetically closed space 15 of a housing 13 is separated into an electric components accommodating space 16 and a high temperature side heat transmitting space 17 by means of a fluid separation plate of an ebullient cooling device 14 and a casing. An electric heater 5 which works as a heating device in the housing is disposed downstream of a high temperature side heat exchanger 3a of an ebullient cooling apparatus which is disposed in the high temperature side heat transmitting space 17 in a flow direction of a high temperature flow. Since the high temperature side heat exchanger 3a has a large effective heat exchanging area, the flow speed of the high temperature air downstream of the heat exchanger 3a is lowered. By mounting the electric heater 5 downstream of the high temperature side heat exchanger 3a where the high temperature air is circulating, the pressure loss within the housing 13 (high temperature side heat transmitting space 17) can be greatly reduced so that the heater 5 can prevent lowering of its heat radiating performance. Accordingly, the temperature of the hermetically closed space 15 in the housing 13 can be held in an optimum condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device in a housing for cooling or heating a high temperature fluid in a housing whose inside is hermetically sealed from the outside. The present invention relates to an air conditioner that cools or heats hot air.

[0002]

2. Description of the Related Art Conventionally, in order to prevent malfunction due to adhesion of foreign matter such as dust, dust and water, a heating element such as an electronic component using a semiconductor is housed and used in a sealed housing. There are cases. In this case, as a method of cooling the heating element, it is not possible to directly take in the outside air into the housing for ventilation, and thus a method of performing heat exchange between the inside air inside the housing and the outside air outside the housing is generally used. ing.

The inventors of the present application filed Japanese Patent Application No. 7-88988 (filed on Apr. 14, 1995) for a boiling cooling device equipped with a thermosyphon type heat exchange device which can be miniaturized by this method. are doing.

[0004]

However, in the above-mentioned boiling cooling device, in order to operate the heating elements such as electronic parts favorably not only when the temperature inside the housing is high, but also when the temperature is low, the internal air inside the housing is cooled. Must be kept above a certain temperature. Therefore, the boiling cooling device is equipped with not only a heat exchanger for cooling the internal air but also a heater for heating the air. The heater is equipped with radiating fins with a fine fin pitch so that the surface temperature of the heater does not rise too much even if the blower for forced forced air circulation stops due to a failure. There is a problem that the amount of circulating air of the internal air circulating inside is reduced and the heat radiation performance is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and prevents a decrease in the circulation flow rate of the internal fluid circulating in the housing to prevent a decrease in the heat radiation performance of the heater in the housing. An object of the present invention is to provide an in-casing temperature adjusting device that can keep the temperature in the casing at an optimum temperature.

[0006]

According to the invention described in claim 1, the position of the heater in the housing is located downstream of the heat exchanger in the housing having a very small fluid flow velocity in the flow direction of the internal fluid. By disposing it, the pressure loss in the in-case heater can be reduced, and thus the decrease in the circulating flow rate of the internal fluid due to the in-case heater can be suppressed. Therefore, since it is possible to prevent the heat dissipation performance of the heater inside the housing from being lowered, it is possible to obtain the effect that the temperature inside the housing can be maintained at an optimum temperature.

According to the second aspect of the present invention, the position of the heater inside the housing is arranged on the downstream side in the flow direction of the internal fluid with respect to the heat exchanger inside the housing where the fluid flow velocity is very small.
Since it is possible to reduce the pressure loss at the radiating fins having a fine fin pitch of the in-case heater, it is possible to suppress a decrease in the circulating flow rate of the internal fluid due to the in-case heater. Therefore,
Since it is possible to prevent the heat dissipation performance of the heater in the housing from being deteriorated, it is possible to obtain an effect that the temperature inside the housing can be maintained at an optimum temperature.

According to the third aspect of the present invention, the opening side notch of the opening side flange provided on the opening side of the heater in the housing is fitted to the guide shaft, and the heater in the housing is The back side notch of the back side flange provided on the back side is fitted to the guide shaft, and the heater in the housing is directly inserted into the back side along the guide shaft.

Next, the back side bracket and the back side flange are constrained within a plane perpendicular to the axial direction of the guide shaft, and the opening side bracket and the opening side flange are fixed by a fixing means. By doing this, it is possible to install and remove the heater inside the housing from the opening provided on one side surface of the housing, so even if the heater inside the housing is heavy, the installation work and the removal work are extremely difficult. The effect that it becomes easy is obtained.

According to the fourth aspect of the present invention, the back side bracket and the back side flange are constrained by the pin and the hole, and the opening side bracket and the opening side flange are fixed by the fixing means. It is possible to easily remove the heater in the housing.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

[Structure of Embodiment] Next, an embodiment in which the in-housing temperature adjusting device of the present invention is incorporated in an electronic device will be described with reference to the drawings. FIG. 1 is a diagram showing the overall structure of an electronic device.

The electronic device 1 is a radio base station device of a mobile radio telephone such as a mobile telephone or a car telephone, and has a housing 13 for hermetically housing the electronic components 11 and 12 therein, and the inside of the housing 13. Which is incorporated into a boiling cooling device (cooler) 14 for cooling the electronic components 11 and 12
And so on.

The electronic component 11 is a heating element (for example, a semiconductor switching element forming a high-frequency switching circuit incorporated in a transceiver) that performs a predetermined operation when electricity flows and generates heat. The electronic component 12 is a heating element (for example, a semiconductor amplifying element such as a power transistor incorporated in a power amplifier) that performs a predetermined operation when electricity flows and also generates heat.

The housing 13 is a housing which is hermetically sealed from the outside, and a sealed space 15 is formed inside. This sealed space 15 is used for dusting electronic components 11 and 12.
Foreign substances such as dust and moisture adhere to the electronic component 11,
In order to prevent the performance of 12 from deteriorating, it is completely airtightly partitioned from the outside by a fluid separator plate of a boiling cooling device 14 which will be described later.

The closed space 15 has a boiling cooling device 1
The liquid separator 4 and the casing of the boiling cooling device 14 separate the electronic component housing space 16 for housing the electronic components 11 and 12 and the high-temperature side heat transfer space 17 as a passage in the housing. The high temperature side heat transfer space 17 has a narrow flow passage area on the windward side in order to make the depth dimension of the boiling cooling device 145 as small as possible, and a flow passage area on the leeward side is wider than that on the windward side. Further, the housing 13 forms a low-temperature-side heat transfer space 18 as an external passage that is airtightly partitioned from the high-temperature-side heat transfer space 17 by a fluid separator.

Next, the boiling cooling device 14 will be described with reference to FIGS.
It will be described based on. Here, FIGS. 2 to 4 are views showing a specific structure of the boiling cooling device 14. The boiling cooling device 14 includes a casing 20 that is integrally provided in the housing 13, a heat exchange device 21 that keeps the air temperature in the closed space 15 below an upper limit temperature (for example, 65 ° C.), and low temperature air (low temperature fluid). Two upper-side centrifugal blowers 22 that generate an air flow, two lower-side centrifugal blowers 23 that generate an air flow of high-temperature air (high-temperature fluid), and the air temperature in the closed space 15 to the lower limit temperature (for example, 0). (C) or higher, an electric heater device 24, a controller 25 for controlling energization of electric equipment of the boiling cooling device 14, and the like.

The casing 20 includes an outer wall plate 26 arranged on the outermost side of the electronic device 1 and a high temperature side heat transfer space 17.
And a rear side partition plate 27 surrounding the outer wall plate 2 and the like.
The rear plate 6 and the rear side partition plate 27 are fixed to the housing 13 by joining such as spot welding or by fastening with fasteners such as screws or bolts.

At the center of the outer wall plate 26, one rectangular low temperature side for sucking low temperature air (dirty outside air containing foreign matter such as dust, dust or water) into the low temperature side heat transfer space 18 from the outside. The suction port 26a is open. Further, on the upper side of the outer wall plate 26, two rectangular low temperature side discharge ports 26b for discharging low temperature air from the upper side centrifugal blower 22 to the outside are opened.

On the upper side of the rear side partition plate 27, there is provided 1 for sucking hot air (clean internal air containing no foreign matter such as dust, dust or water) from the electronic component housing space 16 into the high temperature side heat transfer space 17. Each of the rectangular high temperature side suction ports 27a is open. In addition, below the rear partition plate 27, a duct 27b for guiding the high-temperature air cooled from one lower side centrifugal fan 23 to the electronic component 11 and from the other lower side centrifugal fan 23 to the electronic component 12 are provided. A duct 27c for guiding the cooled high-temperature air is joined by means such as spot welding. The ducts 27b and 27c are integrally connected to the scroll casings 36 of the two lower centrifugal fans 23, respectively.

Next, the heat exchange device 21 will be described in detail with reference to FIGS. Here, FIG. 5 is a diagram showing a specific structure of the boiling cooler, and FIG. 6 is a diagram showing a schematic structure of the boiling cooler.

The heat exchanging device 21 is high temperature air which is the internal air (the internal fluid of the casing, so-called internal air) which circulates in the housing 13 and external air (the external fluid of the casing, which is the external air) which circulates outside the housing 13. A fluid separator 2 for airtightly isolating low-temperature air, and a multi-stage (three-stage) boiling cooler 3 and the like mounted on the fluid separator 2 in a state of penetrating the fluid separator 2. There is.

The fluid separating plate 2 constitutes one wall surface of the closed space 15 whose inside temperature is high and one wall surface of the low temperature side heat transfer space 18 whose inside temperature is low (a part of the housing 13). ) Is done. For example, the closed space 15 including the high-temperature-side heat transfer space 17 and the low-temperature-side heat transfer space 1 are made of a thin plate made of a metal material having excellent thermal conductivity such as aluminum.
8 is integrally joined (brazed) with the evaporator 3 and the casing 20 so as to hermetically partition the outside including the casing 8. A plurality of elongated rectangular or elliptical through holes for penetrating each connecting pipe of the boiling cooler 3 to be described later are formed in the fluid separator 2 at regular intervals. The fluid separator plate 2 may be a divided body (for example, divided into two).

The boiling cooler 3 is assembled in multiple stages (three stages) in a state in which it is tilted at a predetermined angle in the casing 20, and a high temperature side heat exchanger (inside air) in which a fluorocarbon type or freon type refrigerant is enclosed. Side heat exchanger) 3a and low temperature side heat exchanger (outside air side heat exchanger) 3a, and these two high temperature side and low temperature side heat exchangers 3a, 3b.
Are connected by two refrigerant circulation first and second connection pipes 9a and 9b.

The high temperature side heat exchanger 3a is the heat exchanger in the housing of the present invention, and comprises a plurality of boiling cooling pipes 4a, a high temperature side upper end tank 28a, a high temperature side lower end tank 29a, and an adjacent boiling cooling pipe 4a. It is a multi-flow path type heat exchanger composed of heat receiving fins 6a and the like interposed therebetween. On both sides of the high temperature side heat exchanger 3a, side plates 30a, which have a role of fastening to the fluid separator 2 and the casing 20 with fasteners, and a role of reinforcing a plurality of boiling cooling pipes 4a and a plurality of heat receiving fins 6a, are joined. Has been done. Further, since the high temperature side heat exchanger 3a is arranged in the high temperature side heat transfer space 17 which is sealed from the outside by the housing 13, dust,
There is no need to worry about exposure to the air containing foreign matter such as dust or water.

The plurality of boiling cooling pipes 4a are made of a metal material having excellent thermal conductivity, such as aluminum or copper, and have a rectangular cross section or an oblong cross section. The length is 16.0 mm). The high temperature side heat exchanger 3a including these boiling cooling pipes 4a is configured as a refrigerant liquid tank (boiling portion) 7 in which the refrigerant enclosed by receiving the heat from the high temperature air is vaporized.

The high temperature side upper end tank 28a and the high temperature side lower end tank 29a are composed of a core plate provided on the boiling cooling pipe 4a side and a substantially inverted U-shaped tank plate joined to the core plate. It should be noted that one of the high temperature side upper end tank 28a and the high temperature side lower end tank 29a is provided with only one refrigerant sealing port (not shown) for sealing the refrigerant in the boiling cooler 3. The high temperature side heat exchanger 3a of the refrigerant has a liquid level substantially equal to the position of the upper end of the boiling cooling pipe 4a, that is, the height of the boiling portion 7.
Is enclosed in each boiling cooling pipe 4. However, the refrigerant is sealed after the heat receiving fins 6a are brazed to the boiling cooling pipe 4a.

The heat receiving fins 6a are corrugated fins formed in a wave shape by alternately pushing back thin plates (for example, a plate thickness of 0.02 to 0.50 mm) made of a metal material having excellent thermal conductivity such as aluminum. , Boiling cooling tube 4
a is brazed to the flat outer wall surface. That is, the outer wall surface of the boiling cooling pipe 4a and the heat receiving fin 6a are joined together in a fused state.

The low temperature side heat exchanger 3b is a heat exchanger outside the housing of the present invention, and comprises a plurality of boiling cooling pipes 4b, a low temperature side upper end tank 28b, a low temperature side lower end tank 29b, and adjacent boiling cooling pipes 4b. It is a multi-flow path type heat exchanger composed of the radiation fins 6b and the side plate 30b interposed in the heat exchanger. The low temperature side heat exchanger 3b is arranged so as to be located on substantially the same plane as the high temperature side heat exchanger 3a in the low temperature side heat transfer space 18 exposed to the outside air containing foreign matter such as dust, dust or water. ing.

The plurality of boiling cooling pipes 4b are the boiling cooling pipes 4
The low temperature side heat exchanger 3b formed of these boiling cooling pipes 4b formed in the same shape as a is a refrigerant that releases the heat of the refrigerant vapor boiled in the boiling section 7 to the low temperature air to condense and liquefy the refrigerant vapor. It is configured as a steam tank (condensing unit) 8.

Like the high temperature side upper end tank 28a and the high temperature side lower end tank 29a, the low temperature side upper end tank 28b and the low temperature side lower end tank 29b are composed of a core plate and a substantially inverted U-shaped tank plate. The lower end tank 29b on the low temperature side may be inclined so that the second connecting pipe 9b side faces downward.

The radiating fins 6b are corrugated fins formed in the same shape as the heat receiving fins 6a, and are brazed to the flat outer wall surface of the boiling cooling pipe 4b. That is,
The outer wall surface of the boiling cooling pipe 4b and the heat radiation fin 6b are joined together in a fused state.

The first connecting pipe 9a is a metal pipe having a circular cross section made of the same metal material as that of the boiling cooling pipe 4b, and is condensed with the high temperature side upper tank 28a provided at the upper end of the boiling section 7. It communicates with the low temperature side upper end tank 28b provided at the upper end of the portion 8. This connecting pipe 9a
Is a high-temperature / low-temperature inducing means for guiding the refrigerant vapor boiled in the boiling section 7 to the condenser section 8.

The second connecting pipe 9b is a metal pipe having a circular cross section made of the same metal material as that of the first connecting pipe 9a, and includes a low temperature side lower end tank 29b provided at the lower end of the condenser section 8. It communicates with a high temperature side lower end tank 29a provided at the lower end of the boiling section 7. This connecting pipe 9b
Is a low-temperature high-temperature inducing means for guiding the refrigerant liquid condensed and liquefied in the condenser section 8 to the boiling section 7.

The two upper-side centrifugal blowers 22 are means for circulating the fluid outside the casing, and are a centrifugal fan 31 for generating an air flow in the low temperature side heat transfer space 18, and this centrifugal fan 31.
Electric motor 32 for rotating the fan, and centrifugal fan 31
Each has a scroll casing 33 that rotatably accommodates.

The two lower centrifugal blowers 23 are the fluid circulating means in the housing of the present invention, and are a centrifugal fan 34 for generating an air flow in the high temperature side heat transfer space 17, and the centrifugal fan 34. A scroll casing 3 that rotatably houses an electric motor 35 that rotates and a centrifugal fan 34.
6 respectively.

Next, the electric heater device 24 will be described with reference to FIGS.
This will be described in detail with reference to FIGS. here,
7 and 8 are views showing a specific structure of the electric heater device 24.

The electric heater device 24 is an electric heater 5 that is attached and detached from an opening (not shown) provided on one side surface of the casing 20, a heater attachment device 6 for fixing the electric heater 5, and the like. It consists of The opening is opened and closed by the hatch 20a as shown by the chain double-dashed line in FIG.

The electric heater 5 is the in-housing heater of the present invention, and is located in the high temperature side heat transfer space 17 of the housing 13 on the downstream side of the high temperature side heat exchanger 3a of the boiling cooler 3 in the flow direction of high temperature air. It is installed in. This electric heater 5
When the temperature in the closed space 15 of the housing 13 is lower than the lower limit temperature (for example, 0 ° C.), the performance of the electronic components (for example, semiconductor elements) 11 and 12 deteriorates, so the temperature in the closed space 15 is set at the lower limit. It is a high temperature fluid heating means for heating the air flowing through the high temperature side heat transfer space 17 so that the temperature becomes equal to or higher than the temperature. The electric heater 5 of this embodiment has a heat generation amount of 1.2 kW, for example.

As shown in FIG. 9A, the electric heater 5 has a pair of support plates 51 and 52 arranged to face each other.
Four heater bodies 53 to 56 that are bridged in between, a large number of plate fins (radiating fins) 57 provided on the two heater bodies 53 and 54, and a large number provided on the two heater bodies 55 and 56 Plate fins (radiation fins) 58 of
It has a front side flange 59 fixed to one support plate 51, a back side flange 60 fixed to the other support plate 51, and the like.

For the two heater bodies 53 and 54, for example, sheath heaters are used, one heater terminal is connected to the controller 25 by a conductive wire, and the other heater terminal is connected to both. Two heater bodies 5
Similar to the two heater bodies 53 and 54, for example, sheath heaters are used in the reference numerals 5 and 56, one heater terminal is connected to the controller 25 by a conductive wire, and the other heater terminal connects both. ing.

The large number of plate fins 57, 58 are the heat dissipating fins of the present invention, and are a large number of thin plate members (for example, a plate thickness of about 0.02 to 0.50 mm) made of a metal material having excellent thermal conductivity such as aluminum. ), Which are arranged at a fine fin pitch (for example, 5 mm) and have a closed space 1
The heat generated by the four heater bodies 53 to 56 is radiated to the air circulating inside the heater 5.

The front side flange 59 is the opening side flange of the present invention, and is formed of a metal material having high strength in a substantially flat plate shape, and as shown in FIG. 9B, the opening side of the casing 20. Are provided on the four heater bodies 53 to 5
While holding and fixing one end (end on the opening side) of 6,
It functions as a front side mounting stay for mounting to the heater mounting device 6.

The front side flange 59 is fastened and fixed in close contact with one of the support plates 51 using two fasteners 61 such as screws and nuts. Further, a semicircular front side notch 62 as an opening side notch that fits with the heater mounting device 6 is formed on the outer side of the protruding portion of the front side flange 59 that protrudes from the support plate 51. ing. Further, as shown in FIG. 9B, the front side flange 59 has a female screw hole portion 66 screwed into a fastener 63 such as a screw as a fixing means in a substantially semicircular portion protruding downward in the drawing. ing.

The rear side flange 60 is the front side flange 59.
It is formed in the same shape with the same material as the above, and is arranged so as to face the front side flange 59 on the opposite side (back side) with respect to the opening side of the casing 20. The back side flange 60 holds and fixes the other ends (back side ends) of the four heater bodies 53 to 56, and at the same time, functions as a back side mounting stay for mounting the heater mounting device 6.

The rear side flange 60 is fastened and fixed in close contact with the other support plate 52 by using fasteners 64 such as two screws. In addition, the back side flange 60
A semicircular rear side cutout portion 65 that fits with the heater mounting device 6 is formed on the outer side of the protruding portion that protrudes from the support plate 52. Further, the back side flange 60 has a round hole portion (engaged portion) 80 as a restraining means at a position corresponding to the female screw hole portion of the front side flange 59.

The heater mounting device 6 is provided integrally with the casing 20, and has a pair of front sides of the electric heater 5, a pair of front sides for holding and fixing the back side flanges 59, 60, and back side brackets 71, 72, and. It has a guide shaft 73, etc., which is hung over these front and rear brackets 71, 72 and which fits the pair of front, rear flanges 59, 60 of the electric heater 5 slidably in the axial direction. There is.

The front side bracket 71 is the opening side bracket of the present invention, and as shown in FIG.
A flat plate-shaped joining plate 74 formed into a substantially L-shape by a metal material having high strength and joined to the inner surface of the outer wall plate 26 of the casing 20 by means such as spot welding, and in a direction orthogonal to the joining plate 74. It has a bent restraint plate 75 and the like.

The restraint plate 75 has a fastener 63 such as a screw.
A female screw hole portion 76 into which is inserted is formed. As a result, the restraint plate 75 is fixed in the horizontal direction parallel to the axial direction of the guide shaft 73 and in the direction vertical to the horizontal direction by tightening and fixing the front side flange 59 using the fastener 63 such as a screw. It functions as a restricting means for restricting (regulating) the movement of the front side flange 59 (electric heater 5). The restraint plate 75 supports the guide shaft 73 by joining the guide shaft 73 by means such as spot welding in a state where the end portion of the guide shaft 73 penetrates.

The back side bracket 72 is formed of the same material as the front side bracket 71 and has the same shape, and has a flat plate-like joining plate 77 and a restraint plate 78 bent in a direction orthogonal to the joining plate 77. There is. This restraint plate 7
8 has one pin (projection portion, engagement portion) 7 facing inward.
9 is firmly fixed in a protruding state. As a result, the pin 79 and the round hole portion 80 of the rear side flange 60 are fitted to the restraint plate 78, so that the restraint plate 78 is moved in the horizontal direction parallel to the axial direction of the guide shaft 73 and in the direction perpendicular to the horizontal direction. It functions as a restricting unit that restricts (restrains) the movement of the back side flange 60 (electric heater 5). Also, the restraint plate 7
8, the guide shaft 73 is supported by joining the end portion of the guide shaft 73 by means such as spot welding.

The guide shaft 73 is the guide shaft of the present invention, and is a metal shaft having a circular or cylindrical cross section as shown in FIG. 10 (a). The guide shaft 73 is a guide unit that guides the electric heater 5 between the mounting location and the opening when the electric heater 5 is attached or detached.

The guide shaft 73 has a front notch 62 formed in the front flange 59 slidably fitted in the axial direction and a rear notch formed in the rear flange 60. The part 65 is slidably fitted in the axial direction.
As a result, when the electric heater 5 is mounted on the heater mounting device 6, the guide shaft 73 has front and rear side flanges 59, 60 in the vertical direction with respect to the horizontal direction parallel to the axial direction of the guide shaft 73. It functions as a restricting means for restricting (regulating) the movement of the (electric heater 5).

The controller 25, based on the temperature detected in the closed space 15 detected by the temperature sensor 9 composed of a temperature sensitive element such as a thermistor, the electric motors 32 of the two upper centrifugal fans 22 and the two electric motors 32 of the upper centrifugal blower 22. It is a control means for controlling electric devices of the boiling cooling device 14, such as the electric motor 35 of the lower centrifugal blower 23 and the electric heater 5 (four heater bodies 53 to 56).

The controller 25 has two upper side centrifugal blowers 22 and two lower side centrifugal blowers 23 when the temperature in the closed space 15 is equal to or higher than the lower limit temperature (for example, 0 ° C.).
Is operated for Hi (strong air flow) or Lo (low air flow), and the electric heater 5 is turned off. Further, the controller 25 determines that the temperature in the closed space 15 is the lower limit temperature (for example, 0
(° C.) or less, the electric motors 32 of the two upper side centrifugal blowers 22 are turned off, and the electric motors 35 of the two lower side centrifugal blowers 23 are operated in Hi (strong air volume) or Lo operation ( Then, the electric heater 5 is turned on.

[Mounting Method of Embodiment] Next, a mounting method of the electric heater 5 to the heater mounting device 6 of this embodiment will be briefly described with reference to FIGS. 2 and 7 to 10.

When the electric heater 5 is attached to the heater attaching device 6, first, the hatch 20a is opened to open an opening provided on one side surface of the casing 20. The heater mounting device 6 includes a joining plate 7 of a pair of front and rear brackets 71 and 72 holding and fixing the guide shaft 73.
The casing 2 is made by spot welding 4 and 77.
It is fixed to the inner surface of the outer wall plate 26 of 0.

Next, as shown in FIG. 9A, the electric heater 5 having the parts assembled therein is inserted through the opening in the direction of the solid line arrow shown in FIG. At this time, the pair of front side of the electric heater 5, the front side of the rear side flanges 59 and 60, and the rear side cutout portions 62 and 65 are fitted to the guide shaft 73, and the guide shaft 73 is directly attached to the guide shaft 73 as shown in FIG. The electric heater 5 is inserted in the direction indicated by the solid line arrow. This allows the operator to insert the electric heater 5 with one hand even if the electric heater 5 is heavy.

Next, the electric heater 5 finishes the insertion work when the back side flange 60 contacts the back side bracket 72. Next, the round hole portion 80 of the back side flange 60 is fitted into the pin 79 fixed to the back side bracket 72, and the back side flange 60 is constrained to the back side bracket 72 within a horizontal plane parallel to the axial direction of the guide shaft 73. And constrains it in a plane vertical to the horizontal direction.

Next, the female screw hole portion 76 of the front side bracket 71 and the female screw hole portion 66 of the front side flange 59 are aligned with each other, and an operator puts one hand through the opening opening the hatch 20a and fastens a screw or the like. By inserting the tool 63 into both the female screw hole portions 76 and tightening it, the front side flange 59 is constrained to the front side bracket 71 within a horizontal plane parallel to the axial direction of the guide shaft 73, and a vertical plane with respect to the horizontal direction. Fix inside. As described above, the work of mounting the electric heater 5 on the heater mounting device 6 provided integrally with the housing 13 (casing 20) is completed.

[Removing Method of Embodiment] Next, a method of removing the electric heater 5 from the heater mounting device 6 of this embodiment will be briefly described with reference to FIGS. 2 and 7 to 10.

When the electric heater 5 is removed from the heater mounting device 6, the work is performed in the reverse order of the mounting work. That is, the operator puts one hand through the opening opening the hatch 20a and removes the fastener 63 such as a screw to release the fixation of the front side flange 59 by the front side bracket 71, and further the pin 79 and the round hole 80. Release the restraint 7
Remove the back side flange 60 from 2.

Next, as shown by the broken line arrow in FIG. 7, the guide shaft 7 is moved in the direction opposite to the mounting operation of the electric heater 5.
The electric heater 5 is taken out along the line 3. At this time, since the pair of front side, the front side of the rear side flanges 59, 60, and the rear side notch portions 62, 65 can be pulled out in a state of being fitted to the guide shaft 73, the operator temporarily weights the electric heater 5. However, the electric heater 5 can be pulled out with one hand. From the above, the electric heater 5 from the heater mounting device 6
Removal work of is completed.

[Operation of Embodiment] Next, the operation of the boiling cooling device 14 of this embodiment will be briefly described with reference to FIGS. 1 to 6.

When the temperature in the closed space 15 in the housing 13 is equal to or higher than the lower limit temperature (for example, 0 ° C.), the electric motors 32 of the two upper side centrifugal blowers 22 and the electric power of the two lower side centrifugal blowers 23 are driven. When the motor 35 is turned on, the centrifugal fans 31 and 34 start operating. As a result, a circulating flow of high-temperature air (clean internal air or internal fluid that does not include foreign matter such as dust, dust, or water) is generated in the closed space 15 (high-temperature-side heat transfer space 17) inside the housing 13.
In addition, a circulating flow of low-temperature air (dirty outside air containing foreign matter such as dust, dust, or moisture) or an external fluid is generated in the low-temperature side heat transfer space 18 outside the housing 13.

In the boiling cooler 3 which is mounted so as to penetrate the fluid separating plate 2 of the housing 13, the refrigerant enclosed in each boiling cooling pipe 4a of the high temperature side heat exchanger 3a is shown in FIG. As described above, the heat transferred from the high temperature air through the heat receiving fins 6a is received and the gas is boiled and vaporized. The vaporized refrigerant vapor is supplied to the high temperature side upper end tank 28a and the first connecting pipe 9a.
Through the condenser part 8 provided in the low temperature side heat exchanger 3b which is exposed to the low temperature air and has a low temperature, is condensed and liquefied on the inner wall surface, and the latent heat of condensation is transferred to the low temperature air through the radiation fins 6b. It

As shown in FIG. 6, the refrigerant condensed and liquefied in the condensing section 8 travels along the inner wall surface of each boiling cooling pipe 4b by its own weight, and travels through the low temperature side lower end tank 29b and the second connecting pipe 9b to the high temperature side. It drips to the boiling part 7 provided in the heat exchanger 3a.
As described above, the refrigerant enclosed in each of the boiling cooling pipes 4a and 4b repeats boiling vaporization / condensation and liquefaction alternately, thereby transferring the heat of the high temperature air to the low temperature air, so that the electronic components 11 and 12 are The generated heat can be dissipated by the multistage boiling cooler 3.

As a result, high temperature air (clean air inside the housing 13) circulating in the high temperature side heat transfer space 17 of the closed space 15 and low temperature air circulating in the low temperature side heat transfer space 18 (dirt outside the housing 13 The electronic components 11 and 12 can be cooled without being mixed with air.

Here, the closed space 15 in the housing 13
When the internal temperature is lower than the lower limit temperature (for example, 0 ° C.), the electric heater 5 is energized to move the inside of the high temperature side heat transfer space 17 in order to prevent malfunction of the electronic components 11 and 12. Heat the flowing air. At this time, the two upper centrifugal fans 22 are stopped.

On the other hand, the high temperature air in the closed space 15 in the housing 13 is supplied from the electronic component housing space 16 for housing the electronic components 11 and 12 inside to the high temperature side suction port formed in the rear side partition plate 27 of the casing 20. It flows into the boiling cooling device 14 from 27a. The high-temperature air that has flowed into the boiling cooling device 14 first passes through the narrow flow path surrounded by the fluid separator 2 and the rear-side partition plate 27, and then passes through the high-temperature side heat exchanger 3a. That is, the heat is received by the heat receiving fins 6a after passing between the plurality of boiling cooling pipes 4a.

Here, when the hot air passes through the narrow passage, the wind velocity (flow velocity) of the hot air increases, and a large number of plate fins 57 having a fine fin pitch are provided in the narrow passage.
When the electric heater 5 provided with 58 is installed, the pressure loss increases, the circulating air volume of the high temperature air decreases, and the heat dissipation performance of the electric heater 5 decreases.

In order to eliminate such inconvenience, as in this embodiment, in this embodiment, as shown in FIG. 2, the electric heater 5 (electric heater device 24) is boiled and cooled by circulating hot air. Wake of the high temperature side heat exchanger 3a of the vessel 3 (downstream side)
Installed in the housing 13, the enclosed space 1 in the housing 13
5 (especially the heat transfer space 17 on the high temperature side) can be greatly reduced.

[Effects of the Embodiment] As described above, in the present embodiment, the plate fins 57 and 58 made of a large number of thin plate members are arranged in the electric heater 5 to secure the heat transfer area. Since the pitch is very dense, when the passing wind speed is high, the pressure loss is large, the amount of circulating air in the blowing system is small, and the heat dissipation performance of the electric heater 5 is deteriorated.

On the other hand, since the high temperature side heat exchanger 3a has a large effective heat exchange area, the wind velocity of the high temperature air decreases in the wake of the high temperature side heat exchanger 3a.
By installing the electric heater 5 in the downstream of the high temperature side heat exchanger 3a of the boiling cooler 3 in which high temperature air circulates, the pressure loss in the housing 13 (high temperature side heat transfer space 17) can be greatly reduced, It is possible to prevent the heat dissipation performance of the electric heater 5 from decreasing. As a result, the closed space 15 in the housing 13
The temperature inside can be kept at the optimum temperature.

Further, in this embodiment, the mounting work for mounting the electric heater 5 on the heater mounting device 6 and the detaching work for detaching the electric heater 5 from the heater mounting device 6 can be performed very easily. Further, by inserting the pin 79 of the back side bracket 72 of the heater mounting device 6 into the round hole portion 80 of the back side flange 60 of the electric heater 5, the guide shaft 7 is inserted.
Since it is constrained in a direction perpendicular to the axial direction of 3, the structure has excellent vibration resistance.

In this embodiment, the high temperature side heat exchanger 3a forming the boiling part 7 and the low temperature side heat exchanger 3b forming the condensing part 8 are connected in an annular shape by two first and second connecting pipes 9a, 9b. The boiling cooling device 3 is provided with a heat exchange device 21 in which the boiling cooling device 3 is arranged in multiple stages in the air flow direction. With this configuration, a circulating flow of the refrigerant is formed in each boiling cooler 3, and collision of the refrigerant vapor (boiling vapor) and the refrigerant liquid (condensate) can be prevented, so that the heat dissipation performance of each boiling cooler 3 alone ( (Cooling performance) can be improved as compared with the first embodiment. By disposing such a boiling cooler 3 in multiple stages, it is possible to further improve the heat radiation performance (cooling performance) of the boiling cooler 3 of the heat exchange device 21.

[Modification] The boiling cooling device 14 provided with the heat exchange device 21 of the present embodiment is used when it is necessary to accommodate the heating elements such as the electronic components 11 and 12 in the sealed space. . In addition, when it is necessary to store the heating element in a sealed space, for example, when using the heating element in a severe environment containing oil, moisture, iron powder, corrosive gas, etc., or electrical interruption When using an inert gas (helium gas, argon gas, etc.) to prevent arcing or oxidation of contacts when performing, or a gas harmful to the human body (eg, hydrogen fluoride decomposed and produced from fluorocarbons) In some cases, it may not be leaked to.

In this embodiment, a corrugated fin tube type multi-flow path type heat exchanger was used as the boiling cooler 3, the high temperature side heat exchanger 3a and the low temperature side heat exchanger 3b. A plate fin / tube heat exchanger as the high temperature side heat exchanger 3a and the low temperature side heat exchanger 3b,
Fine pin fin tube type heat exchanger, serpentine type heat exchanger in which a flat tube (tube) is formed in a meandering shape, and a drone cup type heat in which a number of boiling cooling tubes with two molded plates are laminated A switch may be used. A slit fin or a louver fin may be used as the heat receiving fin 6a or the heat radiating fin 6b.

In this embodiment, the air inside the housing 13 is
Electronic component 1 as high-temperature fluid (inside air) that is the fluid inside the housing
Although a high temperature gas such as high temperature air that is heated by a heating element such as 1 or 12 is used, electronic components 11 and 12 are used as the high temperature fluid.
A high temperature liquid such as cooling water or oil (including hydraulic oil and lubricating oil) for cooling the heating element such as the above may be used. Similarly,
As the low temperature fluid (outside air) which is the air outside the housing 13 and the fluid outside the housing, not only low temperature gas such as low temperature air but also low temperature liquid such as water or oil may be used. In these cases,
A pump is used as the fluid circulating means inside the housing and the fluid circulating means outside the housing. In addition, a pump and a centrifugal fan 31,
As the drive means for driving 34, not only the electric motors 32 and 35 of this example but also an internal combustion engine, a water turbine, a wind turbine, or the like may be used.

In this embodiment, the electric heater 5 is used as the in-case heater, but the exhaust heat of the internal combustion engine or the heat-generating component is applied to the fluid such as the cooling water as the in-case heater, and the fluid and the high temperature fluid ( A fluid type heater core that heats a high temperature fluid by exchanging heat with the internal fluid) may be used. Although a large number of plate fins 57 and 58 are used as the heat radiation fins, corrugated fins, fine pin fins, slit fins or louver fins may be used as the heat radiation fins.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the overall structure of an electronic device (example).

FIG. 2 is a cross-sectional view showing a specific structure of a boiling cooling device (Example).

FIG. 3 is a front view showing a specific structure of a boiling cooling device (Example).

FIG. 4 is a rear view showing a specific structure of the boiling cooling device (Example).

FIG. 5 is a front view showing a specific structure of a boiling cooler (Example).

FIG. 6 is a cross-sectional view showing a schematic structure of a boiling cooler (Example).

FIG. 7 is a front view showing a specific structure of the electric heater mounting device (Example).

FIG. 8 is a side view showing a specific structure of the electric heater mounting device (embodiment).

FIG. 9A is a front view showing a specific structure of an electric heater, and FIG. 9B is a side view thereof (embodiment).

FIG. 10A is a front view showing a specific structure of a bracket and a guide shaft, and FIG. 10B is a side view thereof (embodiment).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic equipment device (temperature control device in housing) 2 Fluid separator 3 Boiling cooler 5 Electric heater (heater in housing) 7 Boiling part 8 Condensing part 11 Electronic parts (heating element) 12 Electronic parts (heating element) 13 Housing (Case) 14 Boiling Cooling Device 15 Closed Space 17 High Temperature Side Heat Transfer Space (Inside Case Passage) 18 Low Temperature Side Heat Transfer Space (Outside Case Passage) 21 Heat Exchanger 22 Upper Side Centrifugal Blower (Outside Case Fluid Circulation Means) 23 Lower Centrifugal Blower (Fluid Circulation in Housing) 24 Electric Heater Device 57 Plate Fin (Radiation Fin) 58 Plate Fin (Radiation Fin) 59 Front Side Flange (Opening Side Flange) 60 Back Side Flange 62 Front Side Notch Part (opening side cutout part) 63 fastener (fixing means) 65 back side cutout part 66 female screw hole part (restraint means) 71 front bracket (opening part side) Racket) 72 Back side bracket 73 Guide shaft (guide shaft) 79 pin 80 Round hole part (restriction means) 3a High temperature side heat exchanger (heat exchanger inside the housing) 3b Low temperature heat exchanger (heat exchanger outside the housing) 4a Boiling cooling pipe 4b Boiling cooling pipe 6a Heat receiving fin 6b Radiating fin 9a First connecting pipe 9b Second connecting pipe 28a High temperature side upper end tank 28b Low temperature side upper end tank 29a High temperature side lower end tank 29b Low temperature side lower end tank

Claims (4)

[Claims] 1. A casing whose inside is hermetically sealed from the outside to separate the internal fluid from the external fluid, an internal casing fluid circulating means for forcibly circulating the internal fluid in the casing, and arranged inside the casing. A heat exchanger inside the housing that receives heat from the internal fluid and moves to the external fluid side; an outside heat exchanger that is arranged outside the housing and releases the heat received from the internal fluid to the external fluid; and inside the housing And an in-casing heater that heats the internal fluid, wherein the in-casing heater is arranged downstream of the in-casing heat exchanger in a flow direction of the internal fluid. A temperature control device inside a housing, which is characterized by being installed. 2. The in-housing temperature adjusting device according to claim 1, wherein the in-housing heater has radiating fins having a fine fin pitch. 3. The in-housing temperature adjusting device according to claim 1 or 2, wherein the housing is provided on one side surface of the housing, and is openable / closable for attachment / detachment of the in-housing heater. Opening,
An opening side bracket arranged inside the housing on the opening side, an inside bracket arranged inside the housing on the back side with respect to the opening side and facing the opening side bracket, And a guide shaft that connects the opening-side bracket and the back-side bracket and penetrates the opening-side bracket, wherein the in-housing heater has an opening-side flange on the opening side, and the opening. A temperature adjusting device in a housing having a back side flange on the back side with respect to the section side, wherein the opening side flange includes an opening side cutout portion that can be fitted from a side surface of the guide shaft, and the opening. Having a fixing means for fixing to the section side bracket, the rear side flange, a rear side notch portion that can be fitted from the side surface of the guide shaft, and a direction perpendicular to the axial direction of the guide shaft, The back Casing temperature adjusting device, characterized in that it comprises a restraining means that is restrained to the bracket. 4. The in-housing temperature adjusting device according to claim 3, wherein the restraint means is a hole portion restrained by a pin provided on the back bracket. .