JPH06310889A - Electronic apparatus cabinet - Google Patents

Abstract

PURPOSE:To obtain an electronic apparatus cabinet which can give stable cooling capability of high efficiency to a mounted electronic apparatus without being affected by property, temperature, etc., of outside air. CONSTITUTION:The electronic apparatus cabinet accommodates the following; a blower 5 for circulating cooling air, a crossflow heat exchanger 19 for cooling the cooling air by using the cooling water introduced from the outside of the cabinet, a cover for taking out the accommodated crossflow heat exchanger 19, and an electronic apparatus basket 3 which mounts printed wiring boards 1 and has a ventilating port capable of introducing circulating cooling air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device housing for indirectly cooling an electronic circuit component mounted on a printed wiring board or the like housed in an electronic device basket, and particularly to a thermal environment of the electronic circuit component. To improve the life of electronic equipment and improve reliability.

[0002]

2. Description of the Related Art Conventionally, the most general method for cooling an electronic device containing an electronic circuit component has been to blow outside air directly onto the electronic circuit component.

However, as the functions of electronic equipment are becoming more and more dispersed, it is not always installed in a room where temperature, humidity, dust and the like are controlled as in the conventional case. Therefore, in the method in which the outside air is directly blown to the electronic circuit parts, dust floating in the outside air may adhere to the electronic circuit parts, and the adhered parts may be corroded or dielectric breakdown may occur. And it is no longer the preferred method in terms of reliability. In particular, in the case of a large-sized electronic device housing, the fact is that the outside air is sucked in not through the filter but through the filter to cool the electronic components.

FIG. 7 shows a typical electronic equipment housing. Reference numeral 1 is a printed wiring board on which electronic circuit components are mounted, 3 is an electronic device basket that houses the printed wiring board 1, 4 is an electronic device fixing screw that fixes the electronic device basket 3, and 5 is an electronic device housing. Blower, 11 is a connector panel with an external connection plug attached to the back of the electronic device housing, 12 is an electronic device frame with a welded structure assembled from aluminum alloy, and 23 is an air filter attached to the electronic device frame. is there.

Next, the operation will be described. The electronic device basket 3 is housed in the electronic device frame 12 and is connected to the rear surface of the electronic device basket 3 and a cable extending from the inner surface of the connector panel 11 attached to the electronic device frame 12, and the external surface of the connector panel 11 is connected to the outside. The connection plug exchanges signals with other electronic devices.

On the other hand, the heat generated in the electronic equipment basket 3 is
It is cooled by the air coming from the air filter 23 attached to the lower part of the electronic device frame 12, and is discharged to the outside from the blower 5 attached to the upper surface of the electronic device frame 12.

[0007]

Since the conventional electronic device housing is constructed as described above, the lower part of the housing is against heat generated by the printed wiring board 1 on which the electronic circuit parts in the electronic device basket 3 are mounted. Attached to the air filter 23
There is a drawback that the cooling capacity is determined by the influence of the outside air temperature because the outside air is introduced and cooled.

If the outside of the room where the air is installed contains dust, corrosive gas, etc., the dust collection rate of the air filter 23 must be increased. Therefore, there has been a problem that the cooling efficiency decreases due to the decrease of the cooling air amount with the increase of the pressure loss.

The present invention has been made in order to solve the above-mentioned problems, and stops the intake of the outside air, which may have dust and corrosive gas, as a direct refrigerant, and the water from the outside. Introduces a primary cooling system, and circulates the internal air with a blower mounted inside the electronic device housing, thereby obtaining an electronic device housing that can perform high-efficiency cooling without being affected by the outside air temperature and the properties of the outside air. It is an object.

[0010]

An electronic equipment housing according to the present invention has an electronic equipment basket having ventilation openings at upper and lower sides, and a blower for sending cooling air to one ventilation opening of the electronic equipment basket. Then, a duct shape that allows circulation of cooling air from the electronic device storage portion of the electronic device basket to the blower, the upper side of the blower, the side wall, the lower side of the electronic device basket, and the electronic device storage portion of the electronic device basket again is provided. An electronic device frame having a nipple for introducing and discharging cooling water from the outside on the side outer surface, and a coupler corresponding to each of the nipples, and the water formed in the cooling water introducing portion and the discharging portion. A fin (1) is arranged between the pools so that cooling water flows perpendicularly to the cooling air flowing through the side wall of the electronic device frame. A plate for forming a path through which the formed water passes through the fin 1 from one of the water pools, passes through the other of the water pools and drains from the other of the couplers, and the electronic device housing is provided outside the plate. An electronic device in which the respective nipples, which are blocks having fins 2 on both sides through which cooling air circulating inside passes, and a cross-flow heat exchanger that can be removed between couplers, are arranged in the side wall of the electronic device frame. Use a housing.

The electronic device housing according to the present invention is
From an electronic device drawer having a blower for sending cooling air to the mounted electronic device, and from a blower mounted on the electronic device drawer, the upper side, the side wall, the lower side of the electronic device drawer,
The electronic device frame has a duct shape that can circulate cooling air to the electronic device housing of the electronic device drawer, and has an nipple for introducing and discharging cooling water from the outside on the outer surface. A fin 1 having a coupler and arranged so that the cooling water flows perpendicularly to the cooling air flowing through the side wall of the electronic device frame, between the water pools formed in the cooling water inlet and outlet. The cooling water introduced from one of the couplers has a plate forming a path for passing from one of the water pools through the fins 1 and passing through the other of the water pools to the other side of the coupler, and further outside the plate. Is removable between the couplers and the respective nipples formed of blocks having fins 2 on both sides through which the cooling air circulating in the housing of the electronic device passes. The AC-type heat exchanger using the electronic device enclosure arranged in the electronic device frame side wall.

The electronic equipment housing according to the present invention is
The crossflow heat exchanger of the electronic device housing in the above invention has a coupler corresponding to each of the nipples of the electronic device frame, and the electronic device is provided between the water pools formed in the cooling water inlet and outlet. The cooling water introduced from one of the couplers passes through the fins 1 from one of the water pools and has the fins 1 arranged to face the cooling air flowing through the side wall of the frame so that the cooling water flows. From the block having a plate forming a path for discharging from the other side of the coupler via the other side of the coupler, and further having fins 2 on both sides on the outside of the plate through which cooling air circulating in the housing of the electronic device passes. Each of the above nipples,
Also, an electronic device housing configured by a counterflow heat exchanger that is removable between the couplers is used.

[0013]

In the electronic equipment housing according to the present invention, the cooling water is introduced from the outside through the nipple of the electronic equipment frame, and through the coupler of the cross-flow heat exchanger, the flow path inside the cross-flow heat exchanger, the fins, and the other are provided. It is discharged from the other coupler through the flow path of (1) to perform primary cooling.

On the other hand, inside the electronic device housing, a blower disposed inside the electronic device housing operates to be sent to the ventilation path above the electronic device housing, and from the ventilation path above the electronic device housing to the electronic device. It has a circulation system that cools the electronic circuit parts in the electronic equipment basket by passing through the fins of the heat exchanger arranged on the side wall of the equipment housing to perform the secondary cooling and further passing through the ventilation path under the electronic equipment housing. There is.

As described above, the heat generated from the electronic circuit parts is cooled by the cooling air circulating in the housing of the electronic device, so that efficient cooling can be performed without being influenced by the outside air temperature and the nature of the outside air. The reliability and life of the equipment can be extended.

Further, since the heat exchanger can be easily removed, it is possible to easily perform the replacement work which occurs when the inside of the heat exchanger is corroded due to the nature of the cooling water.

Further, even when the corrosion extends to the outside of the heat exchanger, the heat exchanger is arranged on the side wall of the electronic device frame, and the electronic device basket causes the cooling water leaked from the heat exchanger in the electronic device housing. The electronic circuit parts are not directly affected by the leakage of the cooling water because they are located in a place where they are not corroded by the water.

In another invention of the present invention, the electronic equipment basket has a drawer structure and the blower is housed in the electronic equipment drawer, whereby a loss of ventilation between the blower and the electronic equipment can be eliminated, and an efficient cooling system can be provided. As well as getting
Since the blower together with the electronic device drawer can be pulled out from the housing of the electronic device, the replacement work in the event of a blower failure can be smoothly performed, and the maintainability can be improved.

Further, in another invention of the present invention, by making the heat exchanger a counterflow type, the efficiency of the heat exchanger can be improved and the temperature of the cooling air can be lowered, so that the electronic circuit component can be obtained. The operating temperature can be lowered and the reliability can be improved.

[0020]

EXAMPLES Example 1. FIG. 1 is a perspective view showing an appearance of an electronic device housing according to a first embodiment of the present invention in a state where an electronic device basket is pulled out from an electronic device frame, and FIG. 2 is heat exchange mounted in the electronic device housing. FIG. 3 is a perspective view showing a state in which the container is disassembled, and FIG. 3 is a model diagram of the flow of the refrigerant in the housing of the electronic device.

The electronic device housing according to the present invention has ventilation openings on the upper and lower surfaces, and the printed wiring board 1 housed therein is cooled by the cooling air 2 taken in through one of the ventilation openings.
The electronic device basket 3 having a shape that discharges the cooling air 2 from the other of the ventilation ports, and the electronic device basket 3 is housed and fixed by the electronic device basket fixing screw 4, and the electronic device basket 3 One or a plurality of blowers 5 are provided at a position corresponding to one of the ventilation openings, and a blower path for the cooling air 2 is provided on the blower 5 mounting side and a side directly facing the blower 5 mounting side. It has a duct shape communicating each of the ventilation paths, has a first nipple 7 for introducing and discharging the cooling water 6 and a second nipple 8 on the upper surface, and is removable by a cover fixing screw 9 on the side surface. An electronic device frame 12 having a cover 10 and a connector panel 11 having an external connection plug attached to the back surface thereof, the first nipple 7, and the second
Has a first coupler 13 and a second coupler 14 that engage with the nipple 8 of the above, and water pools are formed in the extension portions of the first coupler 13 and the second coupler 14, respectively. Communication between water pools and the electronic device frame 1
A first fin 1 arranged to form a flow path of the cooling water 6 that is orthogonal to the flow direction of the cooling air 2 on the side wall of the second fin 2.
5, and a plate 16 that is in contact with the upper surface and the lower surface of the first fin 15 and forms a flow path of the cooling water 6,
Removable cross-flow heat between the couplers and the nipples, each of which comprises a block 18 having second fins 17 arranged to flow the cooling air 2 on each of the upper and lower surfaces of the plate 16. It is configured by disposing the exchanger 19 on the electronic device frame 12.

In the electronic equipment casing, the cooling water 6 is introduced from the outside into the first nipple 7 of the electronic equipment frame 12 and the inside of the orthogonal heat exchanger 19 is passed through the first coupler 13 of the crossflow heat exchanger 19. After passing through the water pool, the first fin 15, and the other water pool, the water is discharged from the second coupler 14 through the second nipple 8 of the electronic device frame 12 to perform the primary cooling.

On the other hand, when the blower 5 arranged on the electronic device frame 12 operates inside the electronic device housing, the cooling air 2 is blown to the ventilation path above the electronic device frame 12, and the electronic device frame 12 Secondary cooling is performed from the upper ventilation path through the second fins 17 of the cross-flow heat exchanger 19 arranged on the side wall of the electronic device frame 12. The cooling air 2 on the side wall of the electronic device frame 12 is cooled by the cooling water 6 through the cross-flow heat exchanger 19 and passes through the ventilation path at the lower part of the electronic device frame 12 to move inside the electronic device basket 3. Electronic circuit component 1 that has passed and is mounted inside the electronic device basket 3
To cool.

Example 2. FIG. 4 is a perspective view showing an appearance of an electronic device housing according to a second embodiment of the present invention in a state where the electronic device drawer is pulled out from the electronic device frame. In the figure, the electronic device drawer 21 has slide rails 20 on both sides. And one or a plurality of blowers 5 between the slide rails 20, and a ventilating port on the side of the mounting surface of the blower 5 and the side directly facing the mounting surface of the blower 5 for storage. The printed wiring board 1 thus formed is cooled by cooling air 2 introduced from one of the ventilation ports, and the cooling air 2 is discharged from the other of the ventilation ports.

The electronic device frame 12 accommodates the electronic device drawer 21 and is fixed by the fixing screws 4, and has a rail which engages with the slide rail 20 on the inner surface thereof, and a ventilation port of the electronic device drawer 21 and There is a ventilation path for the cooling air 2 above and below the electronic device drawer 21 so as to correspond to the opening of the blower 5, and the side wall has a duct shape communicating with each of the ventilation paths, and has an upper surface. It has a first nipple 7 for introducing and discharging the cooling water 6 and a second nipple 8, a cover 10 which is removable by a cover fixing screw 9 on the side surface, and an external connection plug is attached on the back surface. It has a connector panel 11.

The cross-flow heat exchanger 19 is the first coupler 1 that engages with the first nipple 7 and the second nipple 8.
3 and a second coupler 14, and the first coupler 1
3 and the extension portion of the second coupler 14 respectively form a water pool, communicate between the water pools, and are cooling water perpendicular to the flow direction of the cooling air 2 on the side wall of the electronic device frame 12. First arranged to form 6 channels
Plate 1 having the fins 15 and contacting the upper surface and the lower surface of the first fin 15 to form the flow path of the cooling water 6.
6 and a block 18 having second fins 17 arranged to flow the cooling air 2 on the upper surface and the lower surface of the plate 16, respectively, and is removable between the respective nipples and couplers. It is provided on the side wall of the electronic device frame.

In the first embodiment, the electronic equipment basket 3 has a drawer structure, the blowers 5 are arranged between the slide rails 20 arranged on both sides of the electronic equipment drawer 21, and the electronic equipment drawer 21 and the blower 5 are integrated. Therefore, in the structure in which the blower 5 is mounted on the electronic device frame 12 side, when the blower 5 mounted on the electronic device housing frame 12 side sends the cooling air 2 to the electronic circuit component 1 in the electronic device basket 3, cooling is performed. A part of the air 2 does not pass through the inside of the electronic device basket 3 and flows outside the electronic device basket 3 through a gap between the opening of the electronic device basket 3 and the opening of the blower 5, so that cooling air in the electronic device housing is obtained. It is solved that it is not possible to circulate while spraying 2 onto the electronic circuit component 1 in the electronic device basket 3 efficiently.

Example 3. FIG. 5 shows the appearance of the electronic device housing when the cross-flow heat exchanger 19 in the first and second embodiments is replaced with an AC heat exchanger 22, and FIG. 6 shows a counterflow type. FIG. 3 is a perspective view showing a state in which the heat exchanger 22 is disassembled, and 22 has a first nipple 13 and a second nipple 14 for introducing and discharging the cooling water 6, respectively, on the front surface of the electronic device frame 12. However, the counterflow heat exchanger 22 has the first coupler 13 and the second coupler 14 that engage with the first nipple 13 and the second nipple 14, and the first coupler 13 and Second coupler 1
Each of the extended portions of 4 has a first fin 15 arranged to form a water pool and to form a flow path of the cooling water 6 communicating between the water pools. Top surface,
And a plate 16 that contacts the lower surface and forms a flow path for the cooling water 6
And a block 18 provided with second fins 17 arranged on the upper and lower surfaces of the plate 16 so as to face the flow direction of the cooling water 6 and to allow the cooling air 2 to flow. The heat exchanger is removable between the coupler and the nipple.

【The invention's effect】

As described above, in the present invention, the heat generated from the electronic circuit parts is cooled by the cooling air, and the cooling air whose temperature has risen is cooled by the orthogonal heat exchanger and is again cooled from the outside air for cooling the electronic circuit parts. Since it has a completely independent circulation system, the cooling air that directly contacts the electronic circuit parts is not affected by the outside air, and the temperature of the air that directly cools the electronic circuit parts rises as the outside air temperature rises. However, the cooling capacity does not decrease.

In addition, when the outside air is in contact with the electronic circuit parts, such as when the outside air contains dust containing moisture, the electronic circuit parts are damaged and the performance is deteriorated. However, the electronic device housing does not come into direct contact with the electronic circuit component mounted with outside air, and the electronic circuit component is cooled by the cooling air inside the sealed electronic device housing, so that the electronic circuit component is The reliability can be maintained regardless of the nature of the outside air.

Further, when impurities such as chlorine ions contained in the cooling water flowing in the heat exchanger cause corrosion of the plates constituting the heat exchanger and there is a risk of water leakage,
When the useful life of the heat exchanger itself has passed, the heat exchanger can be removed between the heat exchanger side coupler and the nipple on the electronic equipment frame side, so it is fixed to the side surface of the electronic equipment frame with fixing screws. The heat exchanger can be replaced by itself by removing the cover.

Further, when corrosion progresses even to the outer surface of the plate constituting the heat exchanger and the cooling water leaks to the outer surface of the heat exchanger and enters the housing of the electronic device, the heat placed on the side wall of the electronic device frame is Cooling water leaking from the exchanger should be located in the cooling air flow path under the electronic equipment frame, and the pooled electronic equipment basket should be located next to the heat exchanger inside the electronic equipment housing and above the cooling air flow path under the electronic equipment frame. Therefore, the cooling water does not invade the electronic circuit components in the electronic device basket.

By making the electronic device drawer and the blower into an integral structure, the blower can be installed in the opening of the electronic device drawer without any gap, and all the cooling air from the blower is blown to the electronic circuit parts in the electronic device drawer. A highly efficient cooling air circulation system can be secured.

On the other hand, the blower is a consumable item, and its performance has a great influence on the electronic parts in the housing of the electronic device.
Although replacement work will occur, when the electronic device drawer and blower are integrated, the blower directly attached to the electric device drawer can be taken out together with the electronic device drawer from the electronic device housing. Can be performed smoothly and maintainability can be improved.

Further, since it is generally said that the counterflow type is more efficient than the crossflow type in the heat exchanger, the counterflow type heat exchanger is used to cool the inside of the housing of the electronic device. The efficiency of heat exchange between the air and the cooling water flowing inside the heat exchanger is improved, the temperature of the cooling air is lowered, and the operating temperature of the electronic circuit component can be lowered, so that the electronic circuit component mounted in the housing of the electronic device. The reliability of can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a crossflow heat exchanger.

FIG. 3 is a model diagram showing a flow of a refrigerant in a housing.

FIG. 4 is a perspective view showing an appearance of a second embodiment of the present invention.

FIG. 5 is a perspective view showing an appearance of a third embodiment of the present invention.

FIG. 6 is an exploded perspective view of a counterflow heat exchanger.

FIG. 7 is a perspective view showing the appearance of a conventional housing.

[Explanation of symbols]

 1 Printed Circuit Board 2 Cooling Air 3 Electronic Equipment Basket 4 Electronic Equipment Basket Fixing Screw 5 Blower 6 Cooling Water 7 First Nipple 8 Second Nipple 9 Cover Fixing Screw 10 Cover 11 Connector Panel 12 Electronic Equipment Frame 13 First Coupler 14 second coupler 15 first fin 16 plate 17 second fin 18 block 19 orthogonal heat exchanger 20 slide rail 21 electronic equipment drawer 22 counterflow heat exchanger 23 air filter

Claims (3)

[Claims] 1. An upper surface and a lower surface are provided with ventilation holes, the first refrigerant is introduced from one of the ventilation openings to cool the stored electronic device, and the first refrigerant is introduced from the other of the ventilation openings. An electronic device basket having a duct shape to be discharged, and the electronic device basket is housed, and one or a plurality of blowers is provided at a position corresponding to one of the ventilation openings of the electronic device basket. A first nipple that has a ventilation path for the first refrigerant on the opposite side thereof and a sidewall has a duct shape that communicates with each of the ventilation paths, and that introduces and discharges the second refrigerant on the upper surface. , And a second nipple, and an electronic device frame having a side surface with a removable cover, the first nipple, and the second nipple.
A first coupler and a second coupler that engage with the nipple of the first coupler and a second coupler, and water pools are formed in the extension parts of the first coupler and the second coupler, respectively, and the water pools are communicated with each other. And the first side wall of the electronic device frame.
A first fin arranged to form a flow path of the second refrigerant that is orthogonal to the flow direction of the second refrigerant, contacting the upper surface and the lower surface of the first fin, and flowing the second refrigerant. Provided in the side wall of the electronic device frame, which is a block having a plate forming a passage, and having upper and lower surfaces of the plate and second fins arranged to flow the first coolant. An electronic equipment housing comprising a cross-flow heat exchanger. 2. A slide rail is provided on both side surfaces, and one or a plurality of blowers are provided between the slide rails to circulate the first refrigerant.
A duct shape is provided which has a ventilation port on the side facing it, cools the stored electronic equipment by introducing the first refrigerant from one of the ventilation ports, and discharges the first refrigerant from the other of the ventilation ports. An electronic device drawer having the electronic device drawer, and a rail that engages with the slide rail on the inner surface while accommodating the electronic device drawer, and the air vent of the electronic device drawer and the opening of the blower corresponding to the first. 1 has a ventilation passage for the refrigerant, a side wall has a duct shape communicating with each of the ventilation passages, and has a first nipple for introducing and discharging the second refrigerant and a second nipple on the upper surface. An electronic device frame having a removable cover on a side surface thereof;
Of the first coupler and the second coupler that engage with the second nipple, and a water pool is formed in each of the extension parts of the first coupler and the second coupler,
A first fin arranged to communicate between the water pools and to form a flow path of the second refrigerant that is orthogonal to a flow direction of the first refrigerant on a side wall of the electronic device frame; A plate disposed in contact with the upper surface and the lower surface of the first fin to form a channel for the second refrigerant, and arranged to flow the first refrigerant on the upper surface and the lower surface of the plate, respectively. An electrical equipment housing comprising a block having two fins and a cross-flow heat exchanger provided on the side wall of the electronic equipment frame. 3. A slide rail is provided on both side surfaces, and one or a plurality of blowers are provided between the slide rails to circulate the first refrigerant.
A duct shape is provided which has a ventilation port on the side facing it, cools the stored electronic equipment by introducing the first refrigerant from one of the ventilation ports, and discharges the first refrigerant from the other of the ventilation ports. An electronic device drawer having the electronic device drawer, and a rail that engages with the slide rail on the inner surface while accommodating the electronic device drawer, and the air vent of the electronic device drawer and the opening of the blower corresponding to the first. 1 has a ventilation passage for the refrigerant, a side wall has a duct shape that communicates with each of the ventilation passages, and has a first nipple for introducing and discharging the second refrigerant and a second nipple on the front surface. An electronic device frame having a removable cover on a side surface thereof;
Of the first coupler and the second coupler that engage with the second nipple, and a water pool is formed in each of the extension parts of the first coupler and the second coupler,
A first fin arranged to communicate between the water pools and to form a flow path of the second refrigerant that faces a flow direction of the first refrigerant on a side wall of the electronic device frame; A plate disposed in contact with the upper surface and the lower surface of the first fin to form a channel for the second refrigerant, and arranged to flow the first refrigerant on the upper surface and the lower surface of the plate, respectively. An electric equipment housing comprising a block having two fins and a counterflow heat exchanger provided on the side wall of the electronic equipment frame.