Heat exchange – Intermediate fluent heat exchange material receiving and... – Liquid fluent heat exchange material
Reexamination Certificate
2002-10-24
2004-03-16
Atkinson, Christopher (Department: 3743)
Heat exchange
Intermediate fluent heat exchange material receiving and...
Liquid fluent heat exchange material
C165S104330, C361S700000, C257S715000, C174S015200
Reexamination Certificate
active
06705390
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a cooling apparatus boiling and condensing refrigerant which cools a heat-generating member by heat transfer with boiling of a refrigerant.
2. Description of the Related Art
A conventional cooling apparatus boiling and condensing refrigerant is indicated in
FIG. 7
, by way of example.
This cooling apparatus boiling and condensing refrigerant is comprised of a refrigerant container
100
which reserves refrigerant liquid, a pair of headers
110
,
120
each of which is connected to the refrigerant container
100
, a plurality of tubes
130
provided between the header
110
and the header
120
, and heat radiating fins
140
for radiating heat transferred from the tubes
130
into the air. A heat-generating element
150
is attached to a bottom surface of the refrigerant container
100
.
A separating wall
160
which determines a direction of circulation of the refrigerant is provided in the refrigerant container
100
. Accordingly, as indicated by arrows in the drawing, the refrigerant, in the refrigerant container
100
, boiled by receiving heat from the heat-generating element
150
is introduced, from the refrigerant container
100
to the header
110
, from the header
110
to the other header
120
, being cooled upon passing through each tube
130
, and is circulated into the refrigerant container
100
from the header
120
, as a condensed refrigerant.
The above cooling apparatus boiling and condensing refrigerant generates refrigerant vapor mostly at a portion to which the heat-generating element
150
is attached, however, the refrigerant vapor can be generated at other portions. Accordingly, in the refrigerant container
100
on which the heat-generating element
150
is mounted, the heat is transferred, in progression, from the portion to which the heat-generating element
150
is attached. The temperature of the refrigerant container
100
is increased at a portion which is near the circulating portion to which the header
120
is connected. Accordingly, the refrigerant vapor is also generated near the circulating portion of the refrigerant container
100
. Therefore, when the refrigerant vapor enters the header
120
, it can oppose the condensed refrigerant which is circulated from the header
120
into the refrigerant container
100
. Due to this, a malfunction of refrigerant circulation is caused and the efficiency of the apparatus is degraded.
SUMMARY OF THE INVENTION
In view of the drawbacks mentioned above, according to the invention, there is provided a cooling apparatus boiling and condensing refrigerant in which a malfunction of refrigerant circulation, caused by opposed flows between condensed refrigerant and refrigerant vapor, can be prevented and the degradation of the efficiency thereof can be eliminated. The other purpose of the invention is to provide the cooling apparatus boiling and condensing refrigerant in which the circulation of the refrigerant can be performed smoothly without increasing the size thereof and can be more easily assembled.
The first Aspect of the Invention
According to the invention, there is provided a cooling apparatus boiling and condensing refrigerant in which refrigerant reserved in a refrigerant container can be boiled and evaporated by receiving heat from a heat-generating member and can be used to cool the heat-generating member by radiating latent heat of refrigerant vapor from a heat radiating portion; and when it is assumed that a portion of the upper surface of the refrigerant container on which a mounting portion of the heat-generating member is projected is referred to a boiling area, the tube located within the boiling area has a passage defined by a lower end opening portion connected to the refrigerant container and has a passage cross sectional area larger than that of the tubes located outside the boiling area.
According to the constitution, the refrigerant vapor evaporated by receiving the heat from the heat-generating member can be introduced, with the high priority, in the tube located within the boiling area. Thus, the refrigerant vapor is introduced into a header tank through the tube located within the boiling area, and the refrigerant vapor diffused in the header tank is circulated into the refrigerant container in the form of a condensate after being cooled while passing the tubes located out of the boiling area.
In the present invention, the circulation of the refrigerant can be improved by making the size of a passage cross section of the lower end opening portion of the tube located within the boiling area larger than other tubes. Therefore, neither the size of the heat radiating portion nor the overall size of the apparatus are increased.
The length of the tube located within the boiling area can be identical to that of the tube located out of the boiling area. Both end portions of each tube can be secured in the vertical direction. Thus, the apparatus of the invention can be more easily assembled and can be mass-produced at a lower cost than the cooling apparatus boiling and condensing refrigerant described in the prior art.
The Second Aspect of the Invention
In the cooling apparatus boiling and condensing refrigerant according to the first aspect of the invention, the tube located within the boiling area has a shape in which the lower end portion thereof is suddenly increased in its passage cross section towards the lower end opening portion. Thus, the refrigerant vapor can be effectively introduced to the tube located in the boiling area.
The Third Aspect of the Invention
In the cooling apparatus boiling and condensing refrigerant according to the first aspect of the invention, the tube located within the boiling area has a passage cross section larger than that of the tube located outside the boiling area, over the entirely of the length from the lower end opening portion to be connected to the refrigerant container, to an upper end opening portion to be connected to the header tank.
The Fourth Aspect of the Invention
According to the invention, there is provided a cooling apparatus boiling and condensing refrigerant in which refrigerant reserved in a refrigerant container can be boiled and evaporated by receiving heat from a heat-generating member and can be used to cool the heat-generating member by radiating latent heat of refrigerant vapor from a heat radiating portion; and when it is assumed that a portion of the upper surface of the refrigerant container on which a mounting portion of the heat-generating member is projected is referred to a boiling area, the plurality of tubes are comprised of a first tube group located within the boiling area and a second tube group located out of the boiling area and the adjacent tubes of the first tube group are spaced at a distance smaller than a distance of adjacent tubes of the second tube group.
According to the constitution, the refrigerant vapor evaporated by receiving the heat from the heat-generating member can be introduced, with the high priority, in the tube located within the boiling area, and the adjacent tubes of the first tube group are spaced at a distance smaller than a distance of adjacent tubes of the second tube group. Thus, the refrigerant vapor can be collectively introduced into the tubes of the first tube group.
In the present invention, the circulation of the refrigerant can be improved by merely making the distance between adjacent tubes of the first tube group located within the boiling area smaller than that of the second tube group located out of the boiling area. Therefore, neither the size of the heat radiating portion nor the overall size of the apparatus are increased.
The length of the tubes located within the boiling area can be identical to that of the tube located out of the boiling area. Both end portions of the tube can be secured in the vertical direction. Thus, the apparatus of the invention can be more easily assembled and can be mass-produced at a lower cost than the cooling apparatus boiling and condensing refrigerant described i
Atkinson Christopher
Denso Corporation
Harness Dickey & Pierce PLC
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