US2013175013A1PendingUtilityA1
Heat exchanger
Est. expirySep 29, 2030(~4.2 yrs left)· nominal 20-yr term from priority
B23K 1/203F28D 1/05383B23K 2103/10F28F 2275/122F28F 9/0243F28F 9/0224F28F 3/086F28D 2021/0068F28D 1/05333B23K 2101/14F28F 1/022F28F 9/002F28F 9/0278B23K 1/0012
35
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Claims
Abstract
A heat exchanger includes a pair of headers extending in an up-and-down direction to carry refrigerant, and plural flat tubes connected to the headers at different height positions and extending along a direction intersecting a longitudinal direction of the headers. Each header includes a first member and a flat tube holding member. The first member has a main flow path, and refrigerant connection flow paths to circulate refrigerant between the main flow path and plural refrigerant flow paths formed in the flat tubes. The flat tube holding member holds the flat tubes. End portions of the flat tubes are adhered to the flat tube holding member. Intermediate flow paths interconnect the refrigerant connection flow paths and the plural refrigerant flow paths in the flat tubes. The intermediate flow paths are formed in at least one of the headers and the flat tubes.
Claims
exact text as granted — not AI-modified1 . A heat exchanger comprising:
a pair of headers extending in an up-and-down direction, the pair of headers being configured to carry a refrigerant flow therein; and plural flat tubes connected to the headers at different height positions, the plural flat tubes extending along a direction intersecting a longitudinal direction of the headers, each of the headers including
a first member having a main flow path extending in the up-and-down direction and configured to carry the refrigerant flow therein, and refrigerant connection flow paths extending from the main flow path to an end surface in the direction intersecting the longitudinal direction in order to circulate the refrigerant flow between the main flow path and plural refrigerant flow paths formed in the flat tubes, and
a flat tube holding member with end portions of the flat tubes adhered thereto, the flat tube holding member holding the flat tubes, and
intermediate flow paths interconnecting the refrigerant connection flow paths and the plural refrigerant flow paths in the flat tubes, the intermediate flow paths being formed in at least one of
the headers and
the flat tubes.
2 . The heat exchanger according to claim 1 , wherein
a width of the intermediate flow paths is no more than a width of the flat tubes.
3 . The heat exchanger according to claim 1 , wherein
each of the headers further includes a second member sandwiched between the first member and the flat tube holding member, and in a case where the intermediate flow paths are at least partially formed in the headers, the intermediate flow paths are at least partially formed in the second member.
4 . The heat exchanger according to claim 1 , wherein
in a case where
L1 is a length in a direction orthogonal to a longitudinal direction of the first member of a main flow path forming portion forming the main flow path,
π is pi,
g is a gravitational acceleration,
m is a circulating volume of refrigerant in a gas-liquid two-phase state flowing through the main flow path,
x is an inlet quality, the inlet quality being a ratio of a mass flow rate of the refrigerant in a gas-phase state with respect to a total mass flow rate of the refrigerant in a gas-liquid two-phase state inside an inlet header of the pair of headers, the refrigerant flows from outside into the inlet header,
ρ G is a density of the refrigerant in a gas-phase state flowing through the main flow path,
D is a distance between the uppermost flat tube and a lowermost flat tube, and
C 1 and C 2 are constants,
a relationship
4
C
2
·
π
m
·
x
ρ
G
g
0.5
≤
L
1
2
D
0.5
≤
4
C
1
·
π
m
·
x
ρ
G
g
0.5
holds true, and
C 1 =0.16 and C 2 =1.5.
5 . The heat exchanger according to claim 1 , wherein
in a case where
L1 is a length in a direction orthogonal to a longitudinal direction of the first member of a main flow path forming portion forming the main flow path,
π is pi,
g is a gravitational acceleration,
m is a circulating volume of refrigerant in a gas-liquid two-phase state flowing through the main flow path,
x is an inlet quality, the inlet quality being a ratio of a mass flow rate of the refrigerant in a gas-phase state with respect to a total mass flow rate of the refrigerant in a gas-liquid two-phase state inside an inlet header of the pair of headers, the refrigerant flows from outside into the inlet header,
ρ G is a density of the refrigerant in a gas-phase state flowing through the main flow path,
D is a distance between the uppermost flat tube and a lowermost flat tube, and
C 1 and C 2 are constants,
a relationship
4
C
2
·
π
m
·
x
ρ
G
g
0.5
≤
L
1
2
D
0.5
≤
4
C
1
·
π
m
·
x
ρ
G
g
0.5
holds true, and
C 1 =0.24 and C 2 =1.1.
6 . The heat exchanger according to claim 3 , further comprising
a securing member sandwiched between the flat tube holding member and the second member, the securing member securing the end portions of the plural flat tubes together with the flat tube holding member.
7 . The heat exchanger according to claim 3 , wherein
the second member has a flat panel shape.
8 . The heat exchanger according to claim 3 , wherein
the flat tube holding member covers the second member, and both ends of the flat tube holding member are in contact with and brazed to the first member.
9 . The heat exchanger according to claim 1 , wherein
plural holes are formed in the that tube holding member.
10 . The heat exchanger according to claim 1 , wherein
a length in a direction orthogonal to a longitudinal direction of the first member, of a main flow path forming portion forming the main flow path, is smaller than a width of the flat tubes.
11 . The heat exchanger according to claim 2 , wherein
each of the headers further includes a second member sandwiched between the first member and the flat tube holding member, and in a case where the intermediate flow paths are at least partially formed in the headers, the intermediate flow paths are at least partially formed in the second member.
12 . The heat exchanger according to claim 2 , wherein
in a case where
L1 is a length in a direction orthogonal to a longitudinal direction of the first member of a main flow path forming portion forming the main flow path,
π is pi,
g is a gravitational acceleration,
m is a circulating volume of refrigerant in a gas-liquid two-phase state flowing through the main flow path,
x is an inlet quality, the inlet quality being a ratio of a mass flow rate of the refrigerant in a gas-phase state with respect to a total mass flow rate of the refrigerant in a gas-liquid two-phase state inside an inlet header of the pair of headers, the refrigerant flows from outside into the inlet header,
ρ G is a density of the refrigerant in a gas-phase state flowing through the main flow path,
D is a distance between the uppermost flat tube and a lowermost flat tube, and
C 1 and C 2 are constants,
a relationship
4
C
2
·
π
m
·
x
ρ
G
g
0.5
≤
L
1
2
D
0.5
≤
4
C
1
·
π
m
·
x
ρ
G
g
0.5
holds true, and
C 1 =0.16 and C 2 =1.5.
13 . The heat exchanger according to claim 2 , wherein
in a case where
L1 is a length in a direction orthogonal to a longitudinal direction of the first member of a main flow path forming portion forming the main flow path,
π is pi,
g is a gravitational acceleration,
m is a circulating volume of refrigerant in a gas-liquid-phase state flowing through the main flow path,
x is an inlet quality, the inlet quality being a ratio of a mass flow rate of the refrigerant in a gas-phase state with respect to a total mass flow rate of the refrigerant in a gas-liquid two-phase state inside an inlet header of the pair of headers, the refrigerant flows from outside into the inlet header,
ρ G is a density of the refrigerant in a gas-phase state flowing through the main flow path,
D is a distance between the uppermost flat tube and a lowermost flat tube, and
C 1 and C 2 are constants,
a relationship
4
C
2
·
π
m
·
x
ρ
G
g
0.5
≤
L
1
2
D
0.5
≤
4
C
1
·
π
m
·
x
ρ
G
g
0.5
holds true, and
C 1 =0.24 and C 2 =1.1.
14 . The heat exchanger according to claim 3 , wherein
in a case where
L1 is a length in a direction orthogonal to a longitudinal direction of the first member of a main flow path forming portion forming the main flow path,
π is pi,
g is a gravitational acceleration,
m is a circulating volume of refrigerant in a gas-liquid two-phase state flowing through the main flow path,
x is an inlet quality, the inlet quality being a ratio of a mass flow rate of the refrigerant in a gas-phase state with respect to a total mass flow rate of the refrigerant in a gas-liquid two-phase state inside an inlet header of the pair of headers, the refrigerant flows from outside into the inlet header,
ρ G is a density of the refrigerant in a gas-phase state flowing through the main flow path,
D is a distance between the uppermost flat tube and a lowermost flat tube, and
C 1 and C 2 are constants,
a relationship
4
C
2
·
π
m
·
x
ρ
G
g
0.5
≤
L
1
2
D
0.5
≤
4
C
1
·
π
m
·
x
ρ
G
g
0.5
holds true, and
C 1 =0.16 and C 2 =1.5.
15 . The heat exchanger according to claim 3 , wherein
in a case where
L1 is a length in a direction orthogonal to a longitudinal direction of the first member of a main flow path forming portion forming the main flow path,
π is pi,
g is a gravitational acceleration,
m is a circulating volume of refrigerant in a gas-liquid two-phase state flowing through the main flow path,
x is an inlet quality, the inlet quality being a ratio of a mass flow rate of the refrigerant in a gas-phase state with respect to a total mass flow rate of the refrigerant in a gas-liquid two-phase state inside an inlet header of the pair of headers, the refrigerant flows from outside into the inlet header,
ρ G is a density of the refrigerant in a gas-phase state flowing through the main flow path,
D is a distance between the uppermost flat tube and a lowermost flat tube, and
C 1 and C 2 are constants,
a relationship
4
C
2
·
π
m
·
x
ρ
G
g
0.5
≤
L
1
2
D
0.5
≤
4
C
1
·
π
m
·
x
ρ
G
g
0.5
holds true, and
C 1 =0.24 and C 2 =1.1.
16 . The heat exchanger according to claim 6 , wherein
the second member and the securing member have flat panel shapes.
17 . The heat exchanger according to claim 6 , wherein
the flat tube holding member covers one of
the second member and
the second member and the securing member
from outside, and
both ends of the flat tube holding member are in contact with and brazed to the first member.
18 . The heat exchanger according to claim 7 , wherein
the flat tube holding member covers one of
the second member and
the second member and the securing member
from outside, and
both ends of the flat tube holding member are in contact with and brazed to the first member.Join the waitlist — get patent alerts
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