Heat exchange – Line connected conduit assemblies – In common casing
Reexamination Certificate
1999-05-12
2001-12-04
Leo, Leonard (Department: 3743)
Heat exchange
Line connected conduit assemblies
In common casing
C165S163000, C165S175000, C165S176000
Reexamination Certificate
active
06325139
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a heat-exchange coil assembly, and more particularly to a heat-exchange coil assembly accommodated in a drum for exchanging heat between a heat-exchange medium flowing in the drum and a heat-exchange medium flowing in the coil.
The inventor for the present invention has already proposed, as disclosed in Japanese Patent Laid-Open Publication No. 8-54192, a heat-exchange coil assembly in which a plurality of heat-exchange coils each having a different winding diameter are arranged so that they have a common center line. With this heat-exchange coil assembly, there are provided the advantages that the heat exchange efficiency can be improved without making larger a drum capacity of the heat exchanger, and that the heat exchange capability can freely be set.
In this type of heat-exchange coil assembly as shown in
FIG. 1
, the ends
6
-
1
,
2
,
3
,
4
, and
5
of the heat-exchange coils are linked to an inlet header
2
and the ends
7
-
1
,
2
,
3
,
4
, and
5
to an outlet header
4
at their center lines B—B and B′—B′, respectively. As shown in
FIG. 27
, the linkage is achieved by welding the heat-exchange coils
28
-
1
,
2
,
3
,
4
, and
5
to the same side of the inlet header and outlet header. Because of this configuration, a pitch P' between any adjoining two of the heat-exchange coils
28
-
1
,
2
,
3
,
4
, and
5
must be set to at least a value obtained by adding a width equal to
2
a
, where a equals the width of the weld to the external diameter d of the heat-exchange coil tubes, as shown on FIG.
3
. This required configuration disadvantageously makes it difficult to realize a small-sized and compact heat-exchange coil assembly.
OBJECT AND SUMMARY OF THE INVENTION
The present invention was made to solve the problems associated with the conventional type of heat-exchange coil assembly based on the conventional technology as described above, and it is an object of the present invention to provide a heat-exchange coil assembly which prevents the pitch between adjoining heat-exchange coil pipes from becoming larger due to a welding space for linking an inlet header and an outlet header to the heat-exchange coil. This heat-exchange coil assembly can be installed within a limited space because of this construction, providing a large heat conducting area.
To achieve the object as described above, the present invention provides a heat-exchange assembly coil comprising a medium inlet member having a heat-exchange medium inlet tube and an inlet header, a medium outlet member having a heat-exchange medium outlet tube and an outlet header, and a plurality of heat-exchange coils, each communicating between the inlet header and the outlet header and having a different diameter, and the heat-exchange coil can be installed within a drum and, in one embodiment, is characterized in that each of the heat-exchange coils is linked to the inlet headers and outlet headers alternately located on opposite sides of the common center line of the heat-exchange coils.
In a second embodiment, the present invention is characterized in that the inlet headers and outlet headers are located on the same of the common center line of the heat-exchange coils.
The present invention is characterized in that a plurality of inlet headers and a plurality of outlet headers are linked to one inlet tube and one outlet tube respectively and the inlet headers and outlet headers are linked to each other with a heat-exchange coil respectively.
The present invention is characterized in that the inlet tube and outlet tube comprises first and second inlet tubes and first and second outlet tubes respectively, tips of the inlet headers of the first and second inlet headers are not-commnunicably jointed to each other, tips of the outlet headers of the first and second outlet tubes are not-communicably jointed to each other, and also that heat-exchange coil groups are arranged between the inlet header tube of the first inlet header and the outlet header tube of the first outlet header and between the inlet header of the second inlet tube and the outlet header of the second outlet tube respectively.
The present invention is characterized in that a group of heat-exchange coils corresponding to the first inlet tube and first outlet tube and a group of heat-exchange coils corresponding to the second inlet tube and second outlet tube are different from each other in terms of the coil length and coil diameter.
The present invention is characterized in that the heat-exchange coils are linked to the first and second inlet headers alternately, and are also linked to the first and second outlet headers alternately.
The present invention is characterized in that tips of the first and second inlet headers of the first inlet tube are not-communicably jointed to the first and second inlet headers of the second inlet tube, tips of the first and second outlet headers of the first outlet tube are not- communicably linked to tips of the first and second outlet headers of the second outlet tube, and also that heat exchange coil groups are arranged between the first and second inlet headers of the first inlet tube and first and second outlet headers of the first outlet tube and between the first and second inlet headers of the second inlet tube and the first and second outlet headers of the second outlet tube respectively.
The present invention is characterized in that a group of heat-exchange coils corresponding to the first inlet tube and first outlet tube and a group of heat-exchange coils corresponding to the second inlet tube and second outlet tube are different from each other in terms of the coil length and coil diameter.
The present invention is characterized in that, in a heat-exchange coil assembly installed in a drum and comprising a medium inlet member having an inlet tube and an inlet header each for inletting a heat-exchange medium, a medium outlet member having an outlet tube and an outlet header each for outletting a heat-exchange medium, and a plurality of heat-exchange coils each communicating the inlet header to the outlet header and having a different winding diameter, the medium inlet member and medium outlet member are adjoining and located at positions close to each other.
The present invention is characterized in that the inlet header and outlet header are located in a single tube and formed with chambers separated from each other with a partition.
The present invention is characterized in that the heat-exchange coils have the same length.
REFERENCES:
patent: 1684083 (1928-09-01), Bloom
patent: 3757746 (1973-09-01), Sharan
patent: 4182413 (1980-01-01), Kissinger
patent: 4256176 (1981-03-01), Cohen
patent: 4893672 (1990-01-01), Bader
patent: 5109920 (1992-05-01), Merryfull
patent: 5579836 (1996-12-01), Maruyama
patent: 615889 (1935-07-01), None
patent: 621822 (1927-05-01), None
Kuffner & Associates
Leo Leonard
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