JP3750209B2 - Boiling cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention incorporates a thermosyphon heat exchange device that cools a high-temperature fluid by transferring the heat of the high-temperature fluid that circulates in a housing whose inside is sealed from the outside to a low-temperature fluid that circulates outside the housing. It relates to a boiling cooling device.
[0002]
[Prior art]
Conventionally, in order to prevent malfunction due to adhesion of foreign matters such as dust, dust and moisture, a heating element such as an electronic component using a semiconductor is sometimes housed in a hermetically sealed housing. In this case, as a method of cooling the heating element, the outside air cannot be directly taken into the housing and ventilated, so high temperature air forced to circulate inside the housing by the high temperature side blower and air forced to circulate outside the housing by the low temperature side blower In general, a method of exchanging heat with each other is performed.
[0003]
The inventors of the present application have applied for a boiling cooling device equipped with a thermosyphon heat exchanger that can be miniaturized by this method as Japanese Patent Application No. 7-88888 (filed on April 14, 1995). .
[0004]
[Problems to be solved by the invention]
However, in the above-described boiling cooling device, it is desirable that the drive motors of the high-temperature side and low-temperature side blowers that are forced circulation means provided for promoting heat exchange can be easily removed from the heat exchange device for maintenance. When removing the motor, the fans on the high temperature side and low temperature side blowers interfere with the fan case, so complicated work such as removing the fan from the output shaft of the drive motor is necessary, and improvement in maintainability is desired. Yes.
[0005]
Moreover, in the above-described boiling cooling device, the fan of the low-temperature side fan is rotatably accommodated in a fan case that separates the high-temperature fluid side and the low-temperature fluid side. A drive motor that rotates the fan is attached to the fan case in a state of passing through a fan attachment opening formed in the fan case. For this reason, there is a possibility that foreign matters such as dust, dust and moisture may enter the high-temperature fluid side from the gap between the drive motor and the fan case. Although it is conceivable that the entire drive motor is housed in the fan case, such a problem makes it difficult to replace the drive motor and deteriorates maintainability.
[0006]
OBJECT OF THE INVENTION
The present invention has been made based on the above circumstances, and is boiling cooling that can improve the maintainability of the first actuator of the first forced circulation means and the second actuator of the second forced circulation means. An object is to provide an apparatus. It is another object of the present invention to provide a boiling cooling device that can improve the maintainability of a drive motor that rotationally drives a fan.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, the first set of forced circulation means is disposed below the thermosiphon heat exchange device, and the first actuator is detachably fixed below the heat exchange device. Therefore, the first actuator can be attached to or removed from the boiling cooling device without interfering with the heat exchange device.
[0008]
  Similarly, since the second set of forced circulation means is arranged above the heat exchange device and the second actuator is detachably fixed above the heat exchange device, it interferes with the heat exchange device. In addition, the second actuator can be attached to or removed from the boiling cooling device. Thus, the first and second actuators can be attached and replaced without performing complicated work, so that the maintainability of the first and second actuators can be improved.
  The fan case is provided with a fan mounting opening hole whose hole diameter is larger than the fan outer diameter, and the drive motor fixing heat transfer promotion plate disposed between the fan case and the drive motor is detachable from the fan case. Since the drive motor can be mounted and replaced without complicated operations such as removing the fan from the drive motor, the maintenance performance of the drive motor can be further improved. can get.
[0009]
According to the second aspect of the present invention, a part of the rotor case that separates the first heat transfer space and the second heat transfer space is formed in one actuator arranged on one heat transfer space side. By providing the isolation part which does, foreign materials, such as dust, dust, and water | moisture content, do not penetrate | invade from one heat transfer space to the other heat transfer space. In addition, foreign matter can be prevented from entering without accommodating the entire one actuator in the rotor case, so that one actuator can be easily attached and replaced, and the maintainability of one actuator can be improved. The effect is obtained.
[0010]
According to the third aspect of the present invention, the isolation part of one actuator forms part of the water-inhibiting wall, so that water does not enter from one heat transfer space to the other heat transfer space. Thereby, the effect that the malfunction of the internal components of one actuator and the electronic component in a sealed housing can be prevented is acquired.
[0012]
  Claim4According to the invention described in (1), since the heat transfer acceleration plate for fixing the drive motor is made of a material having excellent thermal conductivity, the heat generated by the drive motor is efficiently released to the fan case by the good thermal conductivity. Can do. As a result, the heat resistance of the drive motor can be improved, or the drive motor can be downsized due to the heat transfer promoting effect.
[0013]
  Claim5According to the invention described in the above, since the heat transfer acceleration plate for fixing the drive motor is made of a metal material mainly composed of aluminum, the heat generated by the drive motor is efficiently released to the fan case by its good thermal conductivity. be able to. As a result, the heat resistance of the drive motor can be improved, or the drive motor can be downsized due to the heat transfer promoting effect.
[0014]
  Claim6According to the invention described in the above, since the heat radiation promoting portion having the groove formed in the circumferential direction is provided on the fan side surface of the drive motor fixing heat transfer acceleration plate, the drive motor fixing heat transfer acceleration plate is provided. Since the heat dissipation effect to the atmospheric fluid is promoted through the above, the heat resistance of the drive motor can be further improved, or the drive motor can be reduced in size.
[0015]
  Claim7According to the invention described in the above, the fluid stirring portion having an uneven shape, a corrugated shape, or a sawtooth shape formed integrally on the side surface of the fan of the side plate is provided. The low-temperature fluid that has been well agitated by the synergistic effect efficiently removes the heat from the heat transfer acceleration plate for fixing the drive motor, so the heat dissipation performance of the heat transfer acceleration plate for fixing the drive motor is improved and the heat resistance of the drive motor is further improved. The effect that it can improve or a drive motor can be reduced in size is acquired.
[0016]
  Claim8According to the invention described in the above, a weir portion for catching droplets contained in a low-temperature fluid (outside air) at the bottom of the fan case and preventing the droplets from leaking from the bottom of the fan case to the heat exchange device side, and the fan case Since the droplet discharge port for discharging droplets staying at the bottom to the outside of the boiling cooling device is formed integrally with the fluid discharge port for low-temperature fluid, it has a simple structure without any special parts or equipment Therefore, it is possible to reliably collect and drain rainwater and other liquid droplets contained in the low-temperature fluid, and to prevent rainwater and other liquid droplets from entering the boiling cooling device, that is, the heat exchange device. The effect that it can be obtained.
[0017]
  Claim9According to the invention described in the above, since the bottom shape of the droplet discharge port is inclined downward toward the outside, the droplet can be reliably drained even when there are many droplets such as rainwater. By leaking out from the bottom of the fan case, it is possible to reliably prevent the intrusion of droplets such as rainwater into the boiling cooling device, that is, the heat exchange device.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment in which the boiling cooling device of the present invention is incorporated in an electronic device will be described with reference to the drawings.
[0019]
[Configuration of the first embodiment]
FIGS. 1 to 10 show a first embodiment of the present invention, FIG. 1 is a diagram showing an overall structure of an electronic device, FIG. 2 is a diagram showing a specific structure of a boiling cooling device, FIG. 3 is a view showing the upper end side structure of the boiling cooling device, and FIG. 4 is a view showing the lower end side structure of the boiling cooling device.
[0020]
The electronic device apparatus 1 is a radio base station apparatus of a mobile radio telephone such as a mobile phone or a car phone, for example, and includes a housing 13 that hermetically accommodates electronic components 11 and 12 therein, and is incorporated in the housing 13. And a boiling cooling device (cooler) 14 for cooling the electronic components 11 and 12.
[0021]
The electronic component 11 is a heating element (for example, a semiconductor switching element constituting 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 generates heat.
[0022]
The housing 13 is a casing that seals the inside from the outside, and a sealed space 15 is formed inside. This sealed space 15 is a fluid of the boiling cooling device 14 to be described later in order to prevent the performance of the electronic components 11 and 12 from deteriorating due to foreign matters such as dust, dust and water adhering to the electronic components 11 and 12. It is completely hermetically separated from the outside by a separator or the like.
[0023]
The sealed space 15 includes an electronic component housing space 16 for housing the electronic components 11 and 12 and a high-temperature side heat transfer space (first housing) as a passage in the housing by the fluid separator of the boiling cooling device 14 and the casing of the boiling cooling device 14. 1 heat transfer space) 17. The high temperature side heat transfer space 17 has a narrow channel area on the windward side to reduce the depth dimension of the boiling cooling device 14, and a channel area on the leeward side is larger than that on the windward side. Further, the housing 13 forms a low-temperature side heat transfer space (second heat transfer space, one heat transfer space) 18 as a housing outer passage hermetically partitioned from the high-temperature side heat transfer space 17 by the fluid separator. is doing.
[0024]
Next, the boiling cooling device 14 will be described with reference to FIGS. Here, FIG. 5 and FIG. 6 are diagrams showing a specific structure of the boiling cooling device 14.
The boiling cooling device 14 is a cooler that cools heating elements such as electronic components 11 and 12 using a semiconductor.
[0025]
The boiling cooling device 14 includes a cabinet 2 provided integrally with the housing 13, a heat exchange device 3 for setting the air temperature in the sealed space 15 to an upper limit temperature (for example, 65 ° C.) or less, and air in the housing (inside air). Two high-temperature side centrifugal fans 4 forcibly circulating high-temperature air (high-temperature fluid), and two low-temperature side centrifugal fans 5 forcibly circulating low-temperature air (cold fluid) that is outside the housing (outside air), An electric heater 6 for setting the air temperature in the sealed space 15 to a lower limit temperature (for example, 0 ° C.) or more, a controller 7 for controlling energization of each electric device of the boiling cooling device 14, and the like.
[0026]
The cabinet 2 is a casing according to the present invention, and includes a door plate 21 arranged on the outermost side of the electronic apparatus device 1, a front side partition plate (front plate) 22 attached to the rear surface of the door plate 21, and a high temperature side. The rear partition plate (back plate) 23 and the like surrounding the heat transfer space 17 are fixed to the housing 13 by joining by means such as spot welding or fastening by a fastener such as a screw or bolt. Further, an upper end side fan cover 8 accommodating two low temperature side centrifugal blowers 5 is detachably attached to the upper portion of the cabinet 2, and two high temperature side centrifugal blowers are attached to the lower portion of the cabinet 2. A lower end side fan cover 9 that accommodates 4 is detachably attached.
[0027]
As shown in FIGS. 2 and 5, low-temperature air (contaminated outside air containing foreign matter such as dust, dust or moisture) is transferred to the center of the door plate 21 and the front side partition plate 22 from the outside. One rectangular low-temperature side suction port 21a for sucking into the space 18 is opened. As shown in FIGS. 2 and 5, the door plate 21 and the upper end fan cover 8 have two rectangular low-temperature side discharges for discharging low-temperature air to the outside from the two low-temperature centrifugal blowers 5. The outlet 21b is open.
[0028]
The two rectangular low-temperature side discharge ports 21b enter water drops such as a plurality of louvers 24, meshes 25 and the like so that rainwater or the like does not easily enter the two low-temperature centrifugal blowers 5 from the outside. Preventive means are attached. The fan cases of the two low-temperature centrifugal blowers 5 are fastened and fixed to the back side of the upper end portion of the door plate 21 by fasteners 21d such as screws and washers via packings 21c.
[0029]
Then, as shown in FIG. 3, the fan case of the two low temperature side centrifugal blowers 5 is fastened and fixed to the top plate portion of the front side partition plate 22 by a fastener 22b such as a screw via a packing 22a. ing. Further, as shown in FIG. 4, the fan case of the two high temperature side centrifugal blowers 4 is fastened and fixed to the bottom plate portion of the front side partition plate 22 by fasteners 22d such as screws via packings 22c. Yes.
[0030]
As shown in FIGS. 2 and 6, high-temperature air (clean inside air that does not include foreign matter such as dust, dust, or moisture) is transmitted to the upper side of the rear partition plate 23 from the electronic component housing space 16. One rectangular high-temperature side suction port 23a for sucking into the heat space 17 is opened. Also, on the lower side of the rear side partition plate 23, a duct 23b for guiding the high temperature air cooled from one high temperature side centrifugal fan 4 to the electronic component 11, and the other high temperature side centrifugal fan 4 to the electronic component 12 are provided. A duct 23c that guides the cooled high-temperature air is joined by means such as spot welding. The ducts 23b and 23c are integrally connected to the fan cases of the two high temperature side centrifugal blowers 4, respectively. As shown in FIG. 4, the rear side partition plate 23 is fastened and fixed to the bottom plate portion of the front side partition plate 22 by a fastener 23 d such as a screw.
[0031]
As shown in FIGS. 1 to 3, the upper end side fan cover 8 has a suction port 24 a for sucking cooling air into the top plate portion from the sealed space 15 and a cooling air from the inside to the back portion. It has a discharge port 24b for discharging. The upper end side fan cover 8 is fastened and fixed to the rear side partition plate 23 by a fastener 24c such as a screw, and the main body side of the cabinet 2 (door plate 21, front side partition plate 22, rear side partition plate 23). It is attached detachably.
[0032]
As shown in FIGS. 1, 2 and 4, the lower end side fan cover 9 has a suction port (not shown) for sucking cooling air into the bottom portion from the sealed space 15 and a sealed space from the inside to the back portion. 15 has a discharge port 25b for discharging cooling air. The lower end side fan cover 9 is fastened and fixed to the front side partition plate 22 by a fastener 25c such as a screw, and the main body side of the cabinet 2 (door plate 21, front side partition plate 22, rear side partition plate 23). It is attached detachably. In addition, the lower end side fan cover 9 has a support base 26 for fixing the controller 7 with a fastener 26a such as a bolt or a nut fastened and fixed with a fastener 25d such as a screw.
[0033]
Next, the heat exchange device 3 will be described in detail based on FIG. 1, FIG. 2, FIG. 7, and FIG. Here, FIG. 7 is a diagram showing a specific structure of the boiling cooler, and FIG. 8 is a diagram showing a schematic structure of the boiling cooler.
[0034]
The heat exchange device 3 includes high-temperature air that is internal air (fluid inside the housing, so-called inside air) that circulates in the housing 13 and low-temperature air that is external air (outside the housing fluid, so-called outside air) that circulates outside the housing 13. And a multi-stage (three-stage) boiling cooler 30 assembled to the fluid separator 13a through the fluid separator 13a.
[0035]
The fluid separator 13a forms one wall surface of the housing 13 (part of the casing) that constitutes one wall surface of the sealed space 15 in which the inside becomes high temperature and one wall surface of the low temperature side heat transfer space 18 in which the inside becomes low temperature. Is. For example, it is made of a thin plate made of a metal material having excellent heat conductivity such as aluminum, and is cooled by boiling so that the sealed space 15 including the high temperature side heat transfer space 17 and the outside including the low temperature side heat transfer space 18 are hermetically partitioned. The unit 30 and the cabinet 2 are integrally joined (brazed). In the fluid separator 13a, a plurality of elongated rectangular or oval through-holes are formed at regular intervals for passing through connecting pipes of the boiling cooler 30 described later. The fluid separator 13a may be a divided body (for example, divided into two).
[0036]
The boiling cooler 30 is assembled in multiple stages (three stages) in a state of being inclined at a predetermined angle in the cabinet 2, and a high temperature side heat exchanger (inside air side heat exchange) in which a fluorocarbon or fluorocarbon refrigerant is enclosed. And a low-temperature side heat exchanger (outside air-side heat exchanger) 3b. The high-temperature side and low-temperature side heat exchangers 3a and 3b are divided into two refrigerant circulation first and second connections. The pipes 3c and 3d are connected.
[0037]
The high temperature side heat exchanger 3a includes a plurality of boiling cooling pipes 27a, a high temperature side upper end tank 28a, a high temperature side lower end tank 29a, a heat receiving fin 30a interposed between adjacent boiling cooling pipes 27a, and the like. Type heat exchanger (in-casing heat exchanger. On both sides of the high temperature side heat exchanger 3a, there are a role of fastening to the fluid separator 13a and the cabinet 2 with fasteners, a plurality of boiling cooling pipes 27a and a plurality of The side plates 3e that reinforce the heat receiving fins 30a are joined together, and the high temperature side heat exchanger 3a is disposed in the high temperature side heat transfer space 17 sealed from the outside by the housing 13. There is no worry of being exposed to outside air containing foreign matter such as dust, dust or moisture.
[0038]
The plurality of boiling cooling tubes 27a are made of, for example, a flat tube (for example, having a width of 1.7 mm and a length of 1.7 mm or less) made of a metal material having excellent thermal conductivity such as aluminum or copper. 16.0 mm). The high temperature side heat exchanger 3a composed of the boiling cooling pipes 27a is configured as a refrigerant liquid tank (boiling part) X that receives heat from high temperature air and evaporates the refrigerant sealed inside.
[0039]
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 27a side and a substantially inverted U-shaped tank plate joined to the core plate. Note that one of the high temperature side upper end tank 28 a and the high temperature side lower end tank 29 a is provided with only one refrigerant sealing port (not shown) for enclosing the refrigerant in the boiling cooler 30. The refrigerant is sealed in each of the boiling cooling tubes 27a of the high temperature side heat exchanger 3a up to a height at which the liquid level substantially coincides with the position of the upper end portion of the boiling cooling tube 27a, that is, to the height of the boiling portion X. However, the refrigerant is sealed after the heat receiving fins 30a are brazed and joined to the boiling cooling pipe 27a.
[0040]
The heat receiving fin 30a is a corrugated fin formed in a corrugated shape by alternately pushing back thin plates (for example, plate thickness of about 0.02 to 0.50 mm) made of a metal material having excellent thermal conductivity such as aluminum. It is brazed to the flat outer wall surface of the tube 27a. That is, the outer wall surface of the boiling cooling pipe 27a and the heat receiving fin 30a are joined together.
[0041]
The low temperature side heat exchanger 3b includes a plurality of boiling cooling pipes 27b, a low temperature side upper end tank 28b, a low temperature side lower end tank 29b, radiating fins 30b interposed between adjacent boiling cooling pipes 27b, a side plate 3f, and the like. This is a multi-flow path type heat exchanger (outside housing heat exchanger). The low-temperature side heat exchanger 3b is arranged so as to be positioned substantially on 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 matters such as dust, dust or moisture. ing.
[0042]
The plurality of boiling cooling pipes 27b are formed in the same shape as the boiling cooling pipe 27a. The low temperature side heat exchanger 3b composed of the boiling cooling pipes 27b is configured as a refrigerant vapor tank (condensing unit) Y that releases the heat of the refrigerant vapor boiled in the boiling unit X to low temperature air to condense and liquefy the refrigerant vapor. The
[0043]
Similarly to 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 low temperature side lower end tank 29b may be inclined so that the second connecting pipe 3d side is downward.
[0044]
The heat radiating fin 30b is a corrugated fin formed in the same shape as the heat receiving fin 30a, and is brazed to the flat outer wall surface of the boiling cooling pipe 27b. That is, the outer wall surface of the boiling cooling pipe 27b and the radiation fin 30b are joined in a fused state.
[0045]
The first connecting pipe 3c is a metal pipe having a circular cross section made of the same metal material as the boiling cooling pipes 27a and 27b, and a high temperature side upper end tank 28a and a condensing part provided at the upper end of the boiling part X. The low temperature side upper end tank 28b provided in the upper end part of Y is connected. The first connection pipe 3c is a high temperature / low temperature induction means for guiding the refrigerant vapor boiled and vaporized in the boiling part X to the condensing part Y.
[0046]
The second connecting pipe 3d is a metal pipe having a circular cross section made of the same metal material as that of the first connecting pipe 3c, and includes a low temperature side lower end tank 29b and a boiling part X provided at the lower end of the condensing part Y. Is communicated with a high temperature side lower end tank 29a provided at the lower end portion of the main body. The second connecting pipe 3d is a low-temperature and high-temperature induction unit that guides the refrigerant liquid condensed and liquefied in the condensing part Y to the boiling part X.
[0047]
Next, the high temperature side centrifugal blower 4 will be described in detail based on FIG. 1, FIG. 2, and FIG.
[0048]
The two high temperature side centrifugal blowers 4 are the first forced circulation means of the present invention, are attached below the heat exchange device 3, and are disposed between the lower end side fan cover 9 and the lower end portion of the cabinet 2. Contained. These high-temperature side centrifugal blowers 4 include a centrifugal fan 31 that forcibly circulates high-temperature air in the high-temperature side heat transfer space 17, a drive motor 32 as a drive unit that rotationally drives the centrifugal fan 31, and a centrifugal fan Each has a fan case 33 that accommodates 31 in a rotatable manner.
[0049]
The centrifugal fan 31 is the first rotor of the present invention, and includes a plurality of blades and a disk-shaped support plate 34 that supports these blades. The support plate 34 is an output shaft of the centrifugal fan 31. 35 is fixed.
[0050]
The drive motor 32 is the first actuator of the present invention, and a heat transfer promotion plate 37 is fitted on the outer periphery of the side plate 36 located closest to the centrifugal fan 31 side. A cooling fan 38 is attached to the output shaft 35 at the lower end portion of the drive motor 32 to cool the drive motor 32 by applying atmospheric air (high temperature air).
[0051]
The fan case 33 has a spiral forced circulation passage 39 formed therein. The fan case 33 has a fluid suction port 33 a for sucking high-temperature air into the forced circulation flow path 39, a fluid discharge port 33 b that opens toward the electronic component housing space 16, and the bottom plate portion from the outer diameter of the centrifugal fan 31. The fan mounting opening hole 33c having a larger hole diameter is provided.
[0052]
The fluid suction port 33 a is formed in the bell mouth portion 40 provided in the top plate portion of the fan case 33. Further, the fluid discharge port 33b communicates with a fluid passage in the ducts 23b and 23c protruding from the lower end side fan cover 9. The top plate portion of the fan case 33 is fastened and fixed to the lower surface of the bottom plate portion of the front side partition plate 22 of the cabinet 2 using a fastener 22d such as a screw via a packing 22c, as shown in FIG. ing.
[0053]
The side plate 36 constitutes a front side frame of the drive motor 32, and has a fluid stirring portion 36a having an uneven shape, a corrugated shape, or a sawtooth shape on the side surface of the centrifugal fan. The fluid stirring unit 36 a is a part that efficiently stirs the low-temperature fluid existing between the support plate 34 of the centrifugal fan 31 and the heat transfer promotion plate 37 by a synergistic effect with the swirling flow of the centrifugal fan 31.
[0054]
The heat transfer acceleration plate 37 is a heat transfer acceleration plate for fixing the drive motor of the present invention, and the stay portion 32a of the drive motor 32 is tightened and fixed using a fastener 37b such as a screw while penetrating the side plate 36. At the same time as the motor mounting means, it is a heat transfer promoting means for efficiently transmitting the heat generated by the drive motor 32 to the fan case 33. The heat transfer promotion plate 37 has a circular through hole (not shown) through which the side plate 36 passes, and is fastened and fixed to the bottom plate portion of the fan case 33 using a fastener 37d such as a screw.
[0055]
Next, the low temperature side centrifugal blower 5 will be described in detail with reference to FIGS. 1 to 3, 9 and 10. Here, FIG. 9 is a view showing a mounting structure of the low temperature side centrifugal blower 5, and FIG. 10 is a view showing a schematic structure of the low temperature side centrifugal blower 5.
[0056]
The two low temperature side centrifugal blowers 5 are the second forced circulation means of the present invention, and are attached above the heat exchange device 3, and are located between the upper end side fan cover 8 and the upper end portion of the cabinet 2. Contained. These two low temperature side centrifugal blowers 5 each have a centrifugal fan 41, a drive motor 42 that rotates the centrifugal fan 41, and a fan case 43 that rotatably accommodates the centrifugal fan 41. .
[0057]
The centrifugal fan 41 is the second rotor of the present invention, and forcibly circulates low-temperature air in the low-temperature side heat transfer space 18. Like the centrifugal fan 31, the centrifugal fan 41 has a large number of blades and these blades. The support plate 44 includes a disc-shaped support plate 44 to be supported. The support plate 44 is fixed to the output shaft 45 of the centrifugal fan 41.
[0058]
The drive motor 42 is the second actuator of the present invention, and, like the drive motor 32, a heat transfer promotion plate 47 is fitted on the outer periphery of the side plate 46 positioned closest to the centrifugal fan 41. A cooling fan 48 is attached to the output shaft 45 at the upper end of the drive motor 42 to cool the drive motor 42 by applying atmospheric air (high temperature air).
[0059]
The fan case 43 is a rotor case of the present invention, and accommodates the centrifugal fan 41 in a rotatable manner, and isolates the high temperature side heat transfer space 17 and the low temperature side heat transfer space 18. A spiral forced circulation channel 49 is formed inside the fan case 43. As shown in FIGS. 3, 9, and 10, the fan case 43 includes a fluid suction port 43 a for sucking low temperature air into the forced circulation channel 49 and a fluid discharge port that communicates with the low temperature side discharge port 21 b of the cabinet 2. The outlet 43b and the top plate portion have a fan mounting opening hole 43c having a diameter larger than the outer diameter of the centrifugal fan 41 and the like.
[0060]
The fluid suction port 43 a is formed in the bell mouth portion 50 provided in the bottom plate portion of the fan case 43. As shown in FIG. 10, the bell mouth portion 50 prevents droplets such as rainwater entering from the fluid discharge port 43 b from leaking from the bottom plate portion of the fan case 43 into the cabinet 2 (low temperature side heat transfer space 18). Also works as a weir. Further, as shown in FIG. 10, the fluid discharge port 43 b also functions as a droplet discharge port for discharging droplets staying at the bottom of the fan case 43 to the outside.
[0061]
As shown in FIG. 3, the bottom plate portion of the fan case 43 is fastened and fixed to the upper surface of the top plate portion of the front side partition plate 22 of the cabinet 2 by using a fastener 22b such as a screw through a packing 22a. ing. Further, the front portion of the fan case 43 is fastened and fixed to the door plate 21 of the cabinet 2 using a fastener 21d such as a screw via a packing 21c.
[0062]
Similar to the side plate 36, the side plate 46 constitutes a front side frame of the drive motor 42, and has a fluid stirring part 46a having an irregular shape, a corrugated shape or a sawtooth shape on the side surface of the centrifugal fan. The fluid agitating unit 46 a is a part that efficiently agitates the low-temperature fluid existing between the support plate 44 of the centrifugal fan 41 and the heat transfer promotion plate 47 by a synergistic effect with the swirling flow of the centrifugal fan 41.
[0063]
The heat transfer acceleration plate 47 is a heat transfer acceleration plate for fixing the drive motor of the present invention. The stay portion 42a of the drive motor 42 is fastened and fixed by using a fastener 47b such as a screw while penetrating the side plate 46. At the same time as the motor mounting means, it is also a heat transfer promoting means for efficiently transmitting the heat generated by the drive motor 42 to the fan case 43. The heat transfer promotion plate 47 has a circular through hole (not shown) through which the side plate 46 passes, and a fastener 47d such as a screw is used on the top plate portion of the fan case 43 via a packing 47c. Tightened and fixed. The heat transfer promotion plate 47 and the stay portion 42a of the drive motor 42 constitute an isolation portion that forms a part of the fan case 43, and water or the like from the low temperature side heat transfer space 18 to the high temperature side heat transfer space 17 The infiltration prevention wall which prevents the invasion of water is formed.
[0064]
The electric heater 6 is arranged in the high temperature side heat transfer space 17 of the housing 13 on the downstream side in the flow direction of the high temperature air with respect to the high temperature side heat exchanger 3 a of the boiling cooler 30. Since the performance of the electronic components (for example, semiconductor elements) 11 and 12 deteriorates when the temperature in the sealed space 15 of the housing 13 is lower than the lower limit temperature (for example, 0 ° C.), the electric heater 6 This 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 of the air becomes higher than the lower limit temperature. The electric heater 6 of this embodiment has a calorific value of 1.2 kW, for example.
[0065]
The controller 7 includes, for example, an electric heater 6, two drive motors 32 for the high temperature side centrifugal blower 4, and two motors based on the detected temperature in the sealed space 15 detected by the temperature sensor 10 including a temperature sensing element such as a thermistor. It is a control means which controls the electric equipment of the boiling cooling device 14, such as the drive motor 42 of the low temperature side centrifugal blower 5.
[0066]
When the temperature in the sealed space 15 is equal to or higher than the lower limit temperature (for example, 0 ° C.), the controller 7 operates the two high temperature side centrifugal fans 4 and the two low temperature side centrifugal fans 5 for Hi operation (strong air volume) or Lo. Operation (weak air volume) is performed and the electric heater 6 is turned off. Further, the controller 7 turns off the drive motors 32 of the two low temperature side centrifugal blowers 5 when the temperature in the sealed space 15 is equal to or lower than the lower limit temperature (for example, 0 ° C.). The drive motor 42 of the fan 4 is operated Hi (strong air volume) or Lo operation (weak air volume), and the electric heater 6 is turned on.
[0067]
[Drive Motor Replacement Method of First Embodiment]
Next, a method for replacing the drive motor 42 of the low temperature side centrifugal blower 5 of this embodiment will be briefly described with reference to FIG.
[0068]
First, the fasteners 24 c such as screws are removed, and the upper end fan cover 8 is removed from the upper end portion of the cabinet 2. Next, a fastener 47 d such as a screw is removed, and the heat transfer promotion plate 47 is removed from the fan case 43. At this time, since the hole diameter of the fan mounting opening hole 43c of the fan case 43 is larger than the outer diameter of the centrifugal fan 41 with the heat transfer promotion plate 47 assembled to the stay portion 42a of the drive motor 42, the centrifugal type With the fan 41 attached to the output shaft 45 of the drive motor 42, the drive motor 42 is easily pulled out from the fan case 43 toward the upper side of the heat exchange device 3.
[0069]
Accordingly, the drive motor 42 can be easily detached from the fan case 43 without performing a complicated operation of removing the centrifugal fan 41 from the output shaft 45 of the drive motor 42 in the fan case 43. When installing a new drive motor 42, first, the support plate 44 of the centrifugal fan 41 and the output shaft 45 of the drive motor 42 are fastened and integrated with a fastener such as a bolt, and then the reverse of the above. Attach to the fan case 43 according to the procedure.
[0070]
Next, a method for replacing the drive motor 32 of the high temperature side centrifugal blower 4 of this embodiment will be briefly described with reference to FIG.
[0071]
Similarly, first, a fastener 25c such as a screw is removed, and the lower end side fan cover 9 is removed from the lower end portion of the cabinet 2. Next, the fasteners 37 d such as screws are removed, and the heat transfer promotion plate 37 is removed from the fan case 33. At this time, since the hole diameter of the fan mounting opening 33c of the fan case 33 is larger than the outer diameter of the centrifugal fan 31 with the heat transfer promotion plate 37 assembled to the stay 32a of the drive motor 32, the centrifugal type With the fan 31 attached to the output shaft 35 of the drive motor 32, the drive motor 32 is easily pulled out from the fan case 33 toward the lower side of the heat exchange device 3.
[0072]
Accordingly, the drive motor 32 can be easily detached from the fan case 33 without performing a complicated operation of removing the centrifugal fan 31 from the output shaft 35 of the drive motor 32 in the fan case 33. When installing a new drive motor 32, first, the support plate 34 of the centrifugal fan 31 and the output shaft 35 of the drive motor 32 are integrated by fastening with a fastener such as a bolt, and then the reverse of the above. It is attached to the fan case 33 by a procedure (see FIG. 9).
[0073]
[Operation of the first embodiment]
Next, the operation of the boiling cooling device 14 of the present embodiment will be briefly described with reference to FIGS.
[0074]
When the temperature in the sealed space 15 in the housing 13 is equal to or higher than the lower limit temperature (for example, 0 ° C.), the drive motors 32 of the two high temperature side centrifugal fans 4 and the drive motors 42 of the two low temperature side centrifugal fans 5 By starting energization, the centrifugal fans 31 and 41 start operating. As a result, a circulating flow of high-temperature air (clean inside air and internal fluid that does not include foreign matters such as dust, dust, or moisture) is generated in the sealed space 15 (high-temperature side heat transfer space 17) in the housing 13. In addition, a circulating flow of low-temperature air (dirty outside air including foreign matter such as dust, dust or moisture) or external fluid is generated in the low-temperature side heat transfer space 18 outside the housing 13.
[0075]
And the boiling cooler 30 attached in the state which penetrated the fluid separator 13a of the housing 13 is the refrigerant | coolant enclosed in each boiling cooling pipe 27a of the high temperature side heat exchanger 3a, as shown in FIG. In response to heat transferred from the high-temperature air through the heat-receiving fins 30a, the gas is boiled and evaporated. The vaporized refrigerant vapor passes through the high temperature side upper end tank 28a and the first connecting pipe 3c, and is condensed and liquefied on the inner wall surface in the condensing part Y provided in the low temperature side heat exchanger 3b exposed to the low temperature air. Then, the latent heat of condensation is transmitted to the low-temperature air through the radiation fins 30b.
[0076]
As shown in FIG. 8, the refrigerant condensed and liquefied in the condensing unit Y travels along the inner wall surface of each boiling cooling pipe 27 b by its own weight, travels through the low temperature side lower end tank 29 b and the second connection pipe 3 d, and travels through the high temperature side heat exchanger. It is dripped at the boiling part X provided in 3a. As described above, the refrigerant enclosed in each of the boiling cooling pipes 27a and 27b repeats boiling vaporization / condensation and liquefaction alternately, thereby transferring the heat of the high-temperature air to the low-temperature air. The generated heat can be dissipated by the multi-stage boiling cooler 30.
[0077]
Thereby, high-temperature air (clean air in the housing 13) circulating in the high-temperature side heat transfer space 17 of the sealed space 15 and low-temperature air (dirty air outside the housing 13) circulating in the low-temperature side heat transfer space 18 The electronic components 11 and 12 can be cooled without mixing.
[0078]
Here, when the temperature in the sealed space 15 in the housing 13 is lower than a lower limit temperature (for example, 0 ° C.), the electric heater 6 is energized to prevent malfunction of the electronic components 11 and 12. Then, the air flowing in the high temperature side heat transfer space 17 is heated. At this time, the two low temperature side centrifugal blowers 5 are stopped.
[0079]
On the other hand, as shown in FIGS. 1 and 2, the high-temperature air circulating in the sealed space 15 in the housing 13 by the rotation of the centrifugal fans 31 of the two high-temperature centrifugal blowers 4 causes electronic components to enter the interior. 11 and 12 flows from the electronic component housing space 16 into the boiling cooling device 14 through the high temperature side suction port 23a formed in the back side partition plate 23 of the cabinet 2. The high-temperature air that has flowed into the boiling cooling device 14 first passes through a narrow flow path surrounded by the fluid separator 13a and the back-side partition plate 23, and then passes through the high-temperature side heat exchanger 3a. That is, the heat receiving fins 30a receive heat through the plurality of boiling cooling tubes 27a.
[0080]
Moreover, in the two high temperature side centrifugal blowers 4, the cooling fan 38 also rotates together with the centrifugal fan 31, as shown in FIG. As a result, high-temperature air is sucked into the inside of the lower end side fan cover 9 from the suction port of the lower end side fan cover 9 to cool the drive motor 32 and then discharged from the discharge port 25b into the electronic component housing space 16 of the sealed space 15. The
[0081]
Further, the low-temperature fluid existing between the support plate 34 and the heat transfer promotion plate 37 is efficient due to the synergistic effect of the fluid agitating portion 36 a formed on the side surface of the centrifugal fan of the side plate 36 and the swirling flow of the centrifugal fan 31. The drive motor 32 is cooled by stirring well. Then, the heat transfer promotion plate 37 efficiently transmits the heat generated by the drive motor 32 to the fan case 33, whereby the drive motor 32 is efficiently cooled.
[0082]
On the other hand, the low-temperature air circulating in the low-temperature side heat transfer space 18 outside the housing 13 by the rotation of the centrifugal fans 41 of the two low-temperature side centrifugal fans 5, as shown in FIGS. From the low-temperature side suction inlet 21a formed in the door plate 21 and the front side partition plate 22 of the cabinet 2, it flows into the boiling cooling device 14. The low temperature air that has flowed into the boiling cooling device 14 passes through the low temperature side heat exchanger 3b. That is, the heat of the refrigerant vapor that has passed through the plurality of boiling cooling tubes 27b and boiled at the boiling portion X from the radiating fins 30b is absorbed.
[0083]
Further, in the two low temperature side centrifugal blowers 5, the cooling fan 48 rotates together with the centrifugal fan 41 as shown in FIG. Thereby, high-temperature air is sucked into the upper end fan cover 8 from the suction port 24a of the upper end fan cover 8 to cool the drive motor 42, and then discharged from the discharge port 24b into the electronic component housing space 16 of the sealed space 15. Is done.
[0084]
Further, the low temperature fluid existing between the support plate 44 and the heat transfer promotion plate 47 is efficient due to the synergistic effect of the fluid agitating unit 46 a formed on the side of the centrifugal fan of the side plate 46 and the swirling flow of the centrifugal fan 41. The drive motor 42 is cooled by stirring well. Then, the heat transfer promotion plate 47 efficiently transfers the heat generated by the drive motor 42 to the fan case 43, whereby the drive motor 42 is efficiently cooled.
[0085]
[Effects of the first embodiment]
As described above, according to the present embodiment, the set of the high-temperature centrifugal blower 4 is arranged below the heat exchange device 3 and the drive motor 32 is detachably fixed below the heat exchange device 3. The drive motor 32 can be attached to or removed from the boiling cooling device 14 without interfering with the heat exchange device 3. Similarly, the low-temperature centrifugal blower 5 set is disposed above the heat exchange device 3 and the drive motor 42 is detachably fixed above the heat exchange device 3 to interfere with the heat exchange device 3. The drive motor 42 can be attached to and removed from the boiling cooling device 14 without doing so. Thereby, the maintainability of the drive motors 32 and 42 can be improved.
[0086]
According to the present embodiment, fan mounting opening holes 33c and 43c having a hole diameter larger than the outer diameter of the centrifugal fans 31 and 41 are provided in the fan cases 33 and 43, and the fan cases 33 and 43 and the drive motors 32 and 42 are provided. The heat transfer promotion plates 37 and 47 disposed between the fan cases 33 and 43 are detachably fixed to the fan cases 33 and 43 so that the centrifugal fans 31 and 41 are driven by the drive motors 32 and 42, respectively. The attachment work and the exchange work of the drive motors 32 and 42 can be performed without performing complicated work such as removal from the output shafts 35 and 45. Thereby, the maintainability of the drive motors 32 and 42 can be further improved.
[0087]
According to the present embodiment, since the heat transfer promotion plates 37 and 47 are made of a metal material mainly composed of aluminum having excellent heat conductivity, the heat generated by the drive motors 32 and 42 is generated by the good heat conductivity. Can be efficiently released to the fan cases 33 and 43. Thereby, the heat resistance of the drive motors 32 and 42 can be improved, or the drive motors 32 and 42 can be downsized due to the heat transfer promotion effect.
[0088]
According to the present embodiment, as shown in FIG. 3 and FIG. 10, droplets contained in the low-temperature fluid (outside air) are collected on the bottom plate portion of the fan case 43 of the low-temperature centrifugal blower 5, and the droplets Is provided with a bell mouth portion 43a for preventing leakage from the bottom plate portion of the fan case 43 to the heat exchange device 3 side, and a liquid for discharging droplets staying on the bottom plate portion of the fan case 43 to the outside of the boiling cooling device 14. The droplet discharge port is integrally formed with a fluid discharge port 43b for low-temperature fluid. As a result, without providing special parts or equipment, it is possible to reliably prevent droplets such as rainwater contained in the low-temperature fluid that has entered the fan case 43 even if the louver 24 and the mesh 25 are provided with a simple structure. Since it is possible to prevent droplets such as rainwater from entering the boiling cooling device 14, that is, the heat exchange device 3, the heat exchange device 3 is corroded by the droplets. Even when a material that is easy to perform, that is, a metal material such as aluminum, is used, corrosion of the heat exchange device 3 can be prevented.
[0089]
According to the present embodiment, the high temperature side heat exchanger 3a forming the boiling part X and the low temperature side heat exchanger 3b forming the condensing part Y are connected in an annular manner by the two first and second connection pipes 3c and 3d. A boiling cooling device 14 including a heat exchange device 3 in which the boiling coolers 30 are arranged in multiple stages in the air flow direction is provided. With this configuration, a circulation flow of the refrigerant is formed in each boiling cooler 30, and collision between the refrigerant vapor (boiling vapor) and the refrigerant liquid (condensate) can be prevented. Therefore, the heat dissipation performance of each boiling cooler 30 ( (Cooling performance) can be improved as compared with the first embodiment. By arranging such boiling coolers 30 in multiple stages, it is possible to further improve the heat radiation performance (cooling performance) of the boiling coolers 30 of the heat exchange device 3.
[0090]
[Second Embodiment]
FIGS. 11 and 12 show a second embodiment of the present invention, and FIGS. 11 and 12 show a side plate and a heat transfer promotion plate of a drive motor.
[0091]
As shown in FIG. 12, a large number of concentric grooves formed in the circumferential direction, which is the same direction as the fluid stirring portion 46a of the side plate 46, are formed on the side surface of the centrifugal fan of the heat transfer promoting plate 47 of this embodiment. A heat dissipation promoting portion 47a is formed. As a result, the heat radiation effect from the drive motor 42 to the atmospheric fluid (high temperature air) through the heat transfer promotion plate 47 is promoted, so that the heat resistance of the drive motor 42 can be further improved than in the first embodiment, or the drive The motor 42 can be reduced in size.
[0092]
[Third embodiment]
FIGS. 13 and 14 show a third embodiment of the present invention. FIG. 13 is a view showing a schematic structure of a low temperature side centrifugal blower, and FIG. 14 is a view showing a support plate of a centrifugal fan. is there.
[0093]
On the motor side surface of the support plate 44 of the centrifugal fan 41 of the present embodiment, a fluid agitating portion 44 a is formed which is formed of a ridge portion or a groove portion extending radially about the output shaft 45. Accordingly, a low-temperature fluid existing between the support plate 44 and the heat transfer promotion plate 47 due to the synergistic effect of the fluid stirring unit 44a of the support plate 44, the fluid stirring unit 46a of the side plate 46, and the swirling flow of the centrifugal fan 41. Can be efficiently stirred and the drive motor 42 can be efficiently cooled. Further, since the support plate 44 is formed to be uneven, the strength of the centrifugal fan 31 can be improved by the fluid stirring portion 44a acting as a reinforcing rib.
[0094]
[Fourth embodiment]
FIG. 15 shows a fourth embodiment of the present invention, and FIG. 15 is a diagram showing a schematic structure of a low temperature side centrifugal blower.
[0095]
In the present embodiment, the bottom plate portion 51 in the vicinity of the fluid discharge port 43b of the fan case 43 is formed obliquely so as to be inclined downward by a predetermined angle (for example, 2 ° to 3 °) toward the outside with respect to the horizontal direction. is doing. Thereby, as in the first embodiment, the bell mouth part 50 that dams up droplets of rainwater and the like is provided in the small plate portion of the fan case 43, and the bottom plate portion of the fan case 43 is compared with the horizontal plate portion. Even when there are many liquid droplets such as rainwater, the liquid droplets can be reliably drained, and the liquid droplets can be reliably prevented from leaking from the bottom plate portion of the fan case 43 to the heat exchange device 3 side. can get.
[0096]
[Fifth embodiment]
FIGS. 16 and 17 show a fifth embodiment of the present invention. FIG. 16 shows a schematic structure of a low temperature side centrifugal blower, and FIG. 17 shows a main structure of the low temperature side centrifugal blower. FIG.
[0097]
The low temperature side centrifugal blower 5 of the present embodiment is similar to the first embodiment in that the centrifugal fan 41 that forcibly circulates low temperature air in the low temperature side heat transfer space 18 (forced circulation flow path 49), and this centrifugal type A drive motor 42 that rotates the fan 41 and a fan case 43 that rotatably accommodates the centrifugal fan 41 are provided.
[0098]
The centrifugal fan 41 is the second rotor of the present invention, one rotor, and includes a large number of blades and a disk-shaped support plate 44. The support plate 44 is fixed to the output shaft 45 of the centrifugal fan 41. The drive motor 42 is the second actuator of the present invention, one actuator, and a heat transfer promotion plate 47 is fitted to the outer periphery of the side plate 46.
[0099]
The heat transfer promotion plate 47 has a circular through-hole 47e through which the side plate 46 passes, and the stay portion 42a of the drive motor 42 is fastened and fixed by using a fastener 47b such as a screw while passing through the side plate 46. is doing. Note that a sealant 47f such as silicone sealant is attached to the outer peripheral portion of the stay portion 42a and the fastening portion of the heat transfer promotion plate 47, and the low temperature side heat transfer space 18 (forced circulation flow path 49) and the high temperature side heat transfer are provided. The airtightness with the thermal space 17 is improved. The heat transfer promotion plate 47 and the stay portion 42a of the drive motor 42 constitute an isolation portion that forms a part of the fan case 43 and a flood prevention wall.
[0100]
The fan case 43 is one rotor case of the present invention, and has a fan mounting opening hole 43c having a hole diameter larger than the outer diameter of the centrifugal fan 41 in the top plate portion. An annular rib 43d is formed on the periphery of the fan mounting opening 43c for line sealing with the rubber packing 47c. Further, in the vicinity of the screw hole 43e of the fastener 47d such as a screw for fastening and fixing the heat transfer promotion plate 47 to the top plate portion of the fan case 43, the clearance between the rib portion 43d and the packing 47c is kept constant. A plate stopper 43f for preventing the cutting of 47c is formed. The top plate portion in the vicinity of the screw hole 43e of the fan case 43 is a ring-shaped convex portion 43g that is subjected to burring toward the bottom plate portion.
[0101]
In this embodiment, foreign matter such as dust, dust or moisture that has entered the low temperature side heat transfer space 18 (forced circulation channel 49) from the fluid suction port 43 a of the fan case 43 is removed from the fan mounting opening hole of the fan case 43. The peripheral edge of 43c and the outer peripheral part of the heat transfer promoting plate 47 are sealed by an annular plate-shaped packing 47c, and the peripheral part of the through hole 47e of the heat transfer promoting plate 47 and the outer peripheral part of the side plate 46 of the drive motor 42 Are sealed with the sealing agent 47f, so that they do not enter the high-temperature side heat transfer space 17 from the fan mounting opening 43c opened at the top plate portion of the fan case 43.
[0102]
Therefore, the heat transfer promotion plate 47 and the stay portion 42a are closed so as to close the fan mounting opening 43c of the fan case 43 that hermetically isolates the high temperature side heat transfer space 17 and the low temperature side heat transfer space 18 together with the fluid separator 13a. Thus, foreign matter does not enter the high temperature side heat transfer space 17 from the forced circulation channel 49 through which the outside air enters through the fan mounting opening hole 43c.
[0103]
As a result, it is possible to prevent problems such as foreign matter entering the drive motor 42 and failure of internal components or insulation failure. Further, since foreign matter such as dust, dust or moisture can be prevented from entering from the low temperature side heat transfer space 18 into the high temperature side heat transfer space 17, the electronic components 11 in the sealed space 15 as shown in FIG. No foreign matter adheres to 12, and malfunction of the electronic components 11 and 12 does not occur.
[0104]
In addition, since the entire drive motor 42 is not housed in the fan case 43 and foreign matter such as dust, dust or moisture can be prevented from entering, the low-temperature centrifugal blower 5 can be easily attached and replaced. Thus, the maintainability of the drive motor 42 can be improved.
[0105]
[Modification]
The boiling cooling device 14 provided with the heat exchange device 3 of the present embodiment is used when it is necessary to house heating elements such as the electronic components 11 and 12 in a sealed space. The case where the heating element needs to be accommodated in a sealed space means that the heating element is used in a harsh environment containing oil, moisture, iron powder, corrosive gas, etc. In some cases, an inert gas (helium gas, argon gas, etc.) is used to prevent arcing during contact and oxidation of the contacts.
[0106]
In this embodiment, corrugated fin tube type multi-flow path type heat exchangers are used as the high temperature side heat exchanger 3a and the low temperature side heat exchanger 3b, but the high temperature side heat exchanger 3a and the low temperature side heat exchanger 3b are used. Plate fin / tube heat exchanger, fine pin fin / tube heat exchanger, serpentine type heat exchanger with flat tube (tube) bent in a meandering shape, boiling with two molded plates bonded together A drone cup type heat exchanger in which a large number of cooling pipes are stacked may be used. A slit fin or a louver fin may be used as the heat receiving fin 30a or the heat radiating fin 30b.
[0107]
In this embodiment, a high-temperature gas such as high-temperature air that is heated by a heating element such as the electronic components 11 and 12 is used as the air inside the housing 13 and the high-temperature fluid (inside air) that is the fluid inside the housing. A high-temperature liquid such as cooling water or oil (including hydraulic oil or lubricating oil) for cooling heating elements such as the electronic components 11 and 12 may be used. Similarly, not only a low-temperature gas such as low-temperature air but also a low-temperature liquid such as water or oil may be used as the outside air of the housing 13 and the low-temperature fluid (outside air) that is a fluid outside the housing. In these cases, the first and second forced circulation means use a pump. In addition, as actuators for driving the pumps and the centrifugal fans 31 and 41, actuators such as an internal combustion engine, a water wheel, and a windmill may be used as well as the drive motors 32 and 42 as in this example.
[Brief description of the drawings]
FIG. 1 is a schematic view showing the overall structure of an electronic device (first embodiment).
FIG. 2 is a cross-sectional view showing a specific structure of the boiling cooling device (first embodiment).
FIG. 3 is a cross-sectional view showing an upper structure of a boiling cooling device (first embodiment).
FIG. 4 is a cross-sectional view showing a lower structure of the boiling cooling device (first embodiment).
FIG. 5 is a front view showing a specific structure of a boiling cooling device (first embodiment).
FIG. 6 is a rear view showing a specific structure of the boiling cooling device (first embodiment).
FIG. 7 is a front view showing a specific structure of a boiling cooler (first embodiment).
FIG. 8 is a cross-sectional view showing a schematic structure of a boiling cooler (first embodiment).
FIG. 9 is an exploded view showing a mounting structure of a low-temperature centrifugal blower (first embodiment).
FIG. 10 is a cross-sectional view showing a schematic structure of a low-temperature centrifugal blower (first embodiment).
FIG. 11 is a sectional view showing a schematic structure of a low-temperature centrifugal blower (second embodiment).
FIG. 12 is a view showing a side plate and a heat transfer promotion plate of a drive motor (second embodiment).
FIG. 13 is a cross-sectional view showing a schematic structure of a low-temperature centrifugal blower (third embodiment).
FIG. 14 is a plan view showing a support plate of a centrifugal fan (third embodiment).
FIG. 15 is a cross-sectional view showing a schematic structure of a low-temperature centrifugal blower (fourth embodiment).
FIG. 16 is a sectional view showing a schematic structure of a low-temperature centrifugal blower (fifth embodiment).
FIG. 17 is an assembly diagram showing the main structure of a low-temperature centrifugal blower (fifth embodiment).
[Explanation of symbols]
X Boiling part
Y Condensing part
1 Electronic equipment
2 Cabinet (casing)
3 heat exchanger
4 High-temperature centrifugal blower (first forced circulation means)
5 Low-temperature centrifugal blower (second forced circulation means)
11 Electronic components (heating elements)
12 Electronic parts (heating elements)
13 Housing (housing)
14 Boiling cooler
15 sealed space
17 High-temperature side heat transfer space (passage in the housing)
18 Low temperature side heat transfer space (external passage)
30 Boiling cooler
31 Centrifugal fan (first rotor)
32 Drive motor (first actuator)
33 fan case
34 Support plate
36 Side plate
37 Heat transfer promotion plate (heat transfer promotion plate for fixing drive motor)
40 Bellmouth
41 Centrifugal fan (second rotor)
42 Drive motor (second actuator)
43 Fan case
44 Support plate
46 Side plate
47 Heat transfer promotion plate (heat transfer promotion plate for fixing the drive motor)
50 Bellmouth part (weir part)
13a Fluid separator
33a Fluid inlet
33b Fluid outlet
33c Fan mounting hole
36a Fluid stirring part (fluid stirring part)
43a Fluid inlet
43b Fluid outlet (droplet outlet)
43c Fan mounting hole
46a Fluid stirring part (fluid stirring part)
47a Heat dissipation promotion part (heat dissipation promotion part)

Claims (9)

A casing whose interior is separated into a first heat transfer space and a second heat transfer space by a fluid separator;
A boiling part that is arranged through the fluid separator and receives heat from the high-temperature fluid and boiles the refrigerant enclosed inside, and heat of the refrigerant vapor boiled in the boiling part is released to the low-temperature fluid to condense the refrigerant vapor. A thermosyphon heat exchange device having a condensing part
A first rotor for forcibly circulating a high-temperature fluid in the first heat transfer space; and a first forced circulation means having a first actuator for rotationally driving the first rotor;
A boiling cooling device comprising: a second rotor for forcibly circulating a low-temperature fluid in the second heat transfer space; and a second forcible circulation means having a second actuator for rotationally driving the second rotor. There,
The first forced circulation means and the second forced circulation means are arranged in a lower part and an upper part in the casing than the heat exchange device ,
A fan as the first rotor and the second rotor;
A drive motor as the first actuator and the second actuator;
A fan case that covers at least one of the fluid suction port and the fluid discharge port while covering the outer periphery of the fan, and forms a forced circulation flow path therein.
A drive motor fixing heat transfer promotion plate disposed between the fan case and the drive motor;
A side plate for clamping the drive motor fixing heat transfer promoting plate with the drive motor;
With
The first actuator and the second actuator are detachably fixed from below and above the heat exchange device ,
The fan case has a fan mounting opening hole having a hole diameter larger than the outer diameter of the fan,
The boiling cooling device, wherein the drive motor fixing heat transfer promotion plate is detachably fixed to the fan case . The boiling cooling device according to claim 1,
One heat transfer space of the first heat transfer space or the second heat transfer space is capable of intrusion of foreign matter such as dust, dust and moisture,
One of the first rotor and the second rotor that forcibly circulates the high-temperature fluid or the low-temperature fluid in the one heat transfer space includes the first heat transfer space and the second heat transfer space. And is housed in a rotor case that isolates
One of the first actuators or the second actuators disposed on the one heat transfer space side has an isolation portion that forms a part of the rotor case. . The boiling cooling device according to claim 2,
The boiling cooling device according to claim 1, wherein the isolation portion of the one actuator forms a part of a water-inhibiting wall that prevents water and the like from entering. The boiling cooling device according to claim 1 ,
The boiling cooling device according to claim 1, wherein the heat transfer promoting plate for fixing the drive motor is made of a material having excellent thermal conductivity. In the boiling cooling device according to claim 1 or 4 ,
The boil cooling device, wherein the heat transfer promotion plate for fixing the drive motor is provided with a metal material mainly composed of aluminum. In the boiling cooling device according to claim 1, claim 4 or claim 5 ,
2. A boiling cooling device according to claim 1, wherein a heat radiation promoting portion having a groove formed in a circumferential direction is provided on a side surface of the fan of the heat transfer promoting plate for fixing the drive motor. In the boiling cooling device according to any one of claims 1 and 4 to 6 ,
The boiling cooling apparatus according to claim 1, wherein a fluid stirring portion having an integrally formed uneven shape, a wave shape, or a sawtooth shape is provided on a side surface of the fan of the side plate. In the boiling cooling device according to any one of claims 1 and 4 to 7 ,
The fan case is a weir portion for preventing liquid droplets contained in the low temperature fluid from leaking from the fan case bottom,
A boiling cooling device characterized by comprising a droplet discharge port formed integrally with the fluid discharge port and for discharging droplets staying at the bottom of the fan case to the outside. The boiling cooling device according to claim 8 ,
A boiling cooling device, wherein a bottom shape of the droplet discharge port is inclined downward toward the outside.

Images