US2025155171A1PendingUtilityA1
Refrigerant distributor, heat exchanger, and refrigeration cycle device
Est. expiryFeb 9, 2042(~15.6 yrs left)· nominal 20-yr term from priority
F25B 41/42F25B 39/028
55
PatentIndex Score
0
Cited by
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Claims
Abstract
A refrigerant distributor comprises a mixing portion having a cylindrical shape. The mixing portion has an inlet for inflow therethrough of a refrigerant at an upstream end of the mixing portion. The mixing portion has a plurality of outlets for outflow therethrough of the refrigerant at a downstream end of the mixing portion opposite to the upstream end. The mixing portion has a recess facing the inlet at the downstream end of the mixing portion. The mixing portion guides the refrigerant flowing in from the inlet to flow along the upstream end of the mixing portion and a side wall of the mixing portion to diffuse the refrigerant in a circumferential direction of the downstream end, and then sends out the refrigerant from the plurality of outlets.
Claims
exact text as granted — not AI-modified1 . A refrigerant distributor comprising a mixing portion having a cylindrical shape, wherein
the mixing portion has an inlet for inflow therethrough of a refrigerant at a first end of the mixing portion, the mixing portion has a plurality of outlets for outflow therethrough of the refrigerant at a second end of the mixing portion opposite to the first end, the mixing portion has a recess facing the inlet at the second end of the mixing portion, the mixing portion guides a gas-phase refrigerant contained in the refrigerant flowing into the recess from the inlet to hit a liquid-phase refrigerant contained in the refrigerant flowing in from the inlet, thereby pressing the liquid-phase refrigerant against the first end of the mixing portion to guide the liquid-phase refrigerant to flow along the first end of the mixing portion and a side wall of the mixing portion to diffuse the liquid-phase refrigerant in a circumferential direction of the second end, and then sends out the liquid-phase refrigerant from the plurality of outlets, the refrigerant distributor further comprises a guide located at the second end of the mixing portion, and the guide guides, from the second end of the mixing portion toward the first end of the mixing portion, the gas-phase refrigerant guided by the mixing portion to hit the liquid-phase refrigerant.
2 . (canceled)
3 . The refrigerant distributor according to claim 1 , wherein
the refrigerant is in a gas-liquid two-phase state, and the mixing portion has a height h (mm) satisfying
ρ
l
1
0
ρ
g
-
13
×
1
0
3
ρ
l
ρ
g
exp
(
-
1
8
G
D
i
2
)
-
33.8
<
h
<
ρ
l
1
0
ρ
g
+
13
×
10
3
ρ
l
ρ
g
exp
(
-
1
8
G
D
i
2
)
-
33.8
1
)
where h (mm) is a distance between the first end and the second end in an internal space of the mixing portion, Di (mm) is an inner diameter of the inlet, G (kg/h) is a mass flow rate of the refrigerant, ρ g (kg/m 3 ) is a gas-phase density of the refrigerant, and ρ l (kg/m 3 ) is a liquid-phase density of the refrigerant.
4 . (canceled)
5 . The refrigerant distributor according to claim 1 , wherein
the plurality of outlets are located apart from the recess outwardly in a radial direction of the second end of the mixing portion, and a first distance being a distance between the recess and an axial center of each of the plurality of outlets is larger than a second distance being a distance between the axial center of each of the plurality of outlets and the side wall of the mixing portion.
6 . The refrigerant distributor according to claim 1 , wherein a height h of the mixing portion is 2.5 to 4 mm inclusive.
7 . The refrigerant distributor according to claim 1 , further comprising:
an inlet tube connected to the inlet; and outlet tubes connected to the plurality of outlets.
8 . The refrigerant distributor according to claim 1 , wherein a height h of the mixing portion is larger than 10/3 mm.
9 . The refrigerant distributor according to claim 1 , wherein
the guide is located apart from the recess outwardly in a radial direction of the second end of the mixing portion and apart from the plurality of outlets inwardly in the radial direction of the second end of the mixing portion, the guide includes a guide side wall inclined with respect to the second end of the mixing portion, the guide side wall has an inner end and an outer end located apart from the inner end outwardly in the radial direction of the second end of the mixing portion, and the outer end of the guide side wall is located closer to the first end of the mixing portion than the inner end of the guide side wall.
10 . A heat exchanger comprising:
the refrigerant distributor according to claim 1 ; and a plurality of heat transfer tubes connected to the plurality of outlets.
11 . A refrigeration cycle device comprising a refrigerant circuit to circulate the refrigerant, the refrigerant circuit comprising:
the heat exchanger according to claim 10 , a compressor to compress the refrigerant, and a throttle device to expand the refrigerant.
12 . A heat exchanger comprising:
the refrigerant distributor according to claim 1 ; and an internal refrigerant pipe connected to the inlet, wherein the internal refrigerant pipe comprises
a straight tube portion that has a linear shape and is connected to the inlet, and
a curved portion that is located upstream from the straight tube portion, is U-shaped, and is connected to the straight tube portion.
13 . A refrigeration cycle device comprising a refrigerant circuit to circulate the refrigerant, the refrigerant circuit comprising
the heat exchanger according to claim 12 , a compressor to compress the refrigerant, and a throttle device to expand the refrigerant.
14 . A refrigerant distributor comprising a mixing portion having a cylindrical shape, wherein
the mixing portion has an inlet for inflow therethrough of a refrigerant at a first end of the mixing portion, the mixing portion has a plurality of outlets for outflow therethrough of the refrigerant at a second end of the mixing portion opposite to the first end, the mixing portion has a recess facing the inlet at the second end of the mixing portion, the mixing portion guides the refrigerant flowing in from the inlet to flow along the first end of the mixing portion and a side wall of the mixing portion to diffuse the refrigerant in a circumferential direction of the second end, and then sends out the refrigerant from the plurality of outlets, and a diameter of the recess is larger than an inner diameter of the inlet.
15 . The refrigerant distributor according to claim 14 , wherein
the refrigerant is in a gas-liquid two-phase state, and the mixing portion has a height h (mm) satisfying
ρ
l
1
0
ρ
g
-
13
×
1
0
3
ρ
l
ρ
g
exp
(
-
1
8
G
D
i
2
)
-
33.8
<
h
<
ρ
l
1
0
ρ
g
+
13
×
10
3
ρ
l
ρ
g
exp
(
-
1
8
G
D
i
2
)
-
33.8
2
)
where h (mm) is a distance between the first end and the second end in an internal space of the mixing portion, Di (mm) is an inner diameter of the inlet, G (kg/h) is a mass flow rate of the refrigerant, ρ g (kg/m 3 ) is a gas-phase density of the refrigerant, and ρ l (kg/m 3 ) is a liquid-phase density of the refrigerant.
16 . The refrigerant distributor according to claim 14 , wherein
the plurality of outlets are located apart from the recess outwardly in a radial direction of the second end of the mixing portion, and a first distance being a distance between the recess and an axial center of each of the plurality of outlets is larger than a second distance being a distance between the axial center of each of the plurality of outlets and the side wall of the mixing portion.
17 . The refrigerant distributor according to claim 14 , wherein a height h of the mixing portion is larger than 10/3 mm.
18 . The refrigerant distributor according to claim 14 , further comprising a guide located at the second end of the mixing portion, wherein
the guide is located apart from the recess outwardly in a radial direction of the second end of the mixing portion and apart from the plurality of outlets inwardly in the radial direction of the second end of the mixing portion, the guide includes a guide side wall inclined with respect to a main surface of the second end of the mixing portion, the guide side wall has an inner end and an outer end located apart from the inner end outwardly in the radial direction of the second end of the mixing portion, and the outer end of the guide side wall is located closer to the first end of the mixing portion than the inner end of the guide side wall.
19 . A heat exchanger comprising:
the refrigerant distributor according to claim 14 ; and a plurality of heat transfer tubes connected to the plurality of outlets.
20 . A refrigeration cycle device comprising a refrigerant circuit to circulate the refrigerant, the refrigerant circuit comprising
the heat exchanger according to claim 19 , a compressor to compress the refrigerant, and a throttle device to expand the refrigerant.
21 . A heat exchanger comprising:
the refrigerant distributor according to claim 14 ; and an internal refrigerant pipe connected to the inlet, wherein the internal refrigerant pipe comprises
a straight tube portion that has a linear shape and is connected to the inlet, and
a curved portion that is located upstream from the straight tube portion, is U-shaped, and is connected to the straight tube portion.
22 . A refrigeration cycle device comprising a refrigerant circuit to circulate the refrigerant, the refrigerant circuit comprising
the heat exchanger according to claim 21 , a compressor to compress the refrigerant, and a throttle device to expand the refrigerant.Join the waitlist — get patent alerts
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