Heat exchanger and heat pump device using same
A heat exchanger and heat transfer tube technology, applied in the field of heat pump devices, can solve the problems of increased pressure loss of carbon dioxide refrigerant and reduced heat exchange capacity, and achieve the effect of improving heat exchange capacity
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Embodiment 1
[0031] exist figure 1 and figure 2 Among them, a heat exchanger 1 has a plurality of heat transfer tubes 2 and a plurality of heat transfer fins 3 . The plurality of heat transfer tubes 2 are spaced apart from each other in the radial direction, and arranged in the up-down direction and the front-rear direction respectively. The plurality of heat transfer fins 3 are arranged at intervals from each other in the axial direction of the heat transfer tube 2 . Carbon dioxide refrigerant flows in the heat transfer tubes 2 . The heat transfer tube 2 is composed of a copper tube extending in the width direction of the heat exchanger 1 . The heat transfer tubes 2 are curved and bent on both sides in the width direction of the heat exchanger 1 . The heat transfer fins 3 are made of plate-shaped aluminum and arranged at a predetermined fin pitch Fp along the width direction of the heat exchanger 1 . The heat transfer tubes 2 are arranged such that adjacent heat transfer tubes 2 in...
Embodiment 2
[0037] With respect to each heat exchanger of the following examples and comparative examples, the following results were obtained using a comparative test of heat exchange performance. In this test, the outer diameter D of the heat transfer tube 2 of the embodiment and the comparative example is 5 mm, the wall thickness t of the heat transfer tube 2 is 0.3 mm, and the number of rows N of the heat transfer tube 2 in the front and rear direction is two. List. In addition, the sheet pitch Fp / N of the heat transfer sheets 3 was 0.75 mm. The refrigerant uses carbon dioxide. In this example and the comparative example, the pitch L1 in the vertical direction and the pitch L2 in the front-back direction of the heat transfer tubes 2 are different.
[0038] Example heat exchangers:
[0039] L1 and L2 of the heat transfer tubes 2 of the five heat exchangers 1 of this embodiment are different from each other. L1 of each heat exchanger 1 is in Figure 8 Expressed as five points in th...
Embodiment 3
[0044] With respect to each heat exchanger 1 of the following examples and comparative examples, the following results were obtained using a comparative test of heat exchange performance. In this test, both the vertical pitch L1 of the heat transfer tubes 2 of the example and the comparative example were 21 mm, and the longitudinal pitch L2 was 18.2 mm. In addition, the refrigerant uses carbon dioxide. In this example and the comparative example, the outer diameter D, wall thickness t, and sheet pitch Fp of the heat transfer tube 2 are different.
[0045] Example heat exchangers:
[0046] The heat exchanger 1 of this embodiment is equipped with heat transfer tubes 2 having an outer diameter D of 5 mm and a wall thickness t of 0.3 mm. In addition, the number N of rows in the front-back direction of the heat transfer tubes 2 is two rows, and the sheet pitch Fp / N of the heat transfer fins 3 is 0.6 mm or 0.75 mm.
[0047] Heat exchanger of comparative example:
[0048] The hea...
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