Heat exchanger and a heat pump using same
View Patent ↗A heat exchanger having a plurality of heat-transfer tubes arrayed at intervals in vertical and anteroposterior directions and arranged so that an equilateral triangle is formed by lines connecting the centers of heat-transfer tubes located vertically and anteroposteriorly adjacent to each other; and a plurality of heat-transfer corrugated fins arranged at intervals in an axial direction of the heat-transfer tubes, characterized in that when an external diameter of each of the heat-transfer tubes is V1; a vertical pitch of the heat-transfer tubes is V2, a fin pitch of the heat-transfer corrugated fins is V3, a fin plate thickness of each of the heat-transfer corrugated fins is V4, and a corrugate height of the heat-transfer corrugated fins is V5, any one of V2, V3 and V5 is set within a given range.
1. A heat exchanger having a plurality of heat-transfer tubes arrayed at intervals in vertical and anteroposterior directions and arranged so that an equilateral triangle is formed by lines connecting respective centers of heat-transfer tubes located vertically and anteroposteriorly adjacent to each other; and a plurality of heat-transfer corrugated fins arranged at intervals in an axial direction of the heat-transfer tubes, wherein:
when an external diameter of each of the heat-transfer tubes is V1, a vertical pitch of the heat-transfer tubes is V2, a fin pitch of the heat-transfer corrugated fins is V3, a fin plate thickness of each of the heat-transfer corrugated fins is V4, and a corrugate height of the heat-transfer corrugated fins is V5, at least values of V1 and V4 are arbitrarily provided, and at least any one of values V2, V3 and V5 is set from the following relationships:
-
0.8
2
C
22
(
C
2
+
C
12
V
1
+
C
23
V
3
+
C
24
V
4
+
C
25
V
5
)
≤
V
2
≤
-
1.2
2
C
22
(
C
2
+
C
12
V
1
+
C
23
V
3
+
C
24
V
4
+
C
25
V5
)
,
-
0.8
2
C
33
(
C
3
+
C
13
V
1
+
C
23
V
2
+
C
34
V
4
+
C
35
V5
)
≤
V
3
≤
-
1.2
2
C
33
(
C
3
+
C
13
V
1
+
C
23
V
2
+
C
34
V
4
+
C
35
V
5
)
,
and
-
0.8
C
55
(
C
5
+
C
15
V
1
+
C
25
V
2
+
C
35
V
5
)
≤
V
5
≤
-
1.2
2
C
22
(
C
5
+
C
15
V
1
+
C
25
V
2
+
C
35
V
3
)
,
where coefficients Cx are values shown in the following table:
TABLE 1
C0
1274.598
C1
−468.304
C2
85.77825
C3
323.3443
C4
−4920.25
C5
681.3158
C11
14.17817
C12
11.37856
C13
−53.7093
C14
1110.834
C15
−82.8563
C22
−2.11724
C23
3.432876
C24
−235.301
C25
−26.9782
C33
−25.3635
C34
−425.852
C35
197.8195
C44
8831.846
C55
−129.915.
2. The heat exchanger according to claim 1 , wherein the external diameter V1 of each of the heat-transfer tubes is set within a range that satisfies the following relationship:
4 mm≦ V 1≦8 mm.
3. The heat exchanger according to claim 1 , wherein a carbon dioxide refrigerant flows through the heat-transfer tubes.
4. A heat pump characterized by using, as an evaporator of a refrigerating circuit, the heat exchanger claimed in claim 1 .