Heat exchanger and air conditioner

Patent metadata

Field	Value
Publication number	US-2024240824-A1
Application number	US-202418618623-A
Country	US
Kind code	A1
Filing date	Mar 27, 2024
Priority date	Sep 27, 2021
Publication date	Jul 18, 2024
Grant date	—

Abstract

A heat exchanger includes: a heat transfer tube allowing a refrigerant to flow; and a fin having through holes that are aligned in columns in a second direction crossing a first direction in which air flows. The through holes include: first through holes each penetrated by the heat transfer tube in a thickness direction of the fin; and second through holes not penetrated by the heat transfer tube. The fin includes: a first region having the first through holes; and a second region having the second through holes. One or both ends of the second region in the first direction are adjacent to the first region. Both ends of the second region in the second direction are adjacent to the first region.

First claim

What is claimed is:

1 . A heat exchanger comprising:
a heat transfer tube allowing a refrigerant to flow; and a fin having through holes that are aligned in columns in a second direction crossing a first direction in which air flows, the through holes including:
first through holes each penetrated by the heat transfer tube in a thickness direction of the fin; and
second through holes not penetrated by the heat transfer tube, wherein the fin comprises:
a first region having the first through holes; and a second region having the second through holes, one or both ends of the second region in the first direction are adjacent to the first region, and both ends of the second region in the second direction are adjacent to the first region.

2 . The heat exchanger according to claim 1 , wherein
the first through holes include an outlet through hole through which the heat transfer tube penetrates and at which a refrigerant evaporated in the heat exchanger exits, and the outlet through hole is adjacent to the first region in the first direction.

3 . The heat exchanger according to claim 2 , wherein the outlet through hole is adjacent to a windward side of the first region.

4 . The heat exchanger according to claim 1 , wherein the through holes in a column on a windward side of the heat exchanger are staggered with respect to the through holes in a column on a leeward side of the heat exchanger.

5 . The heat exchanger according to claim 1 , wherein
the fin comprises a narrow portion having a smaller width than an average width of the fin in the first direction, and the first through holes include a narrow portion through hole closest to the narrow portion.

6 . The heat exchanger according to claim 5 , wherein the fin is bent in the first direction at the narrow portion.

7 . The heat exchanger according to claim 5 , wherein
the first through holes include an inlet through hole through which the heat transfer tube penetrates and at which a refrigerant evaporated in the heat exchanger enters, and the narrow portion through hole is the inlet through hole.

8 . The heat exchanger according to claim 7 , wherein the narrow portion through hole is adjacent in the first direction to the second region.

9 . The heat exchanger according to claim 1 , wherein
the first through holes include an inlet through hole through which the heat transfer tube penetrates and at which a refrigerant evaporated in the heat exchanger enters, and the inlet through hole is disposed:
in a region where air passing the heat exchanger has air flow speed higher than average air flow speed, and
in a column on a leeward side of the heat exchanger.

10 . An air conditioner comprising:
a refrigerant circuit comprising a compressor, a heat source heat exchanger, an expansion valve, and a utilization heat exchanger connected in a mentioned order, wherein the utilization heat exchanger comprises the heat exchanger according to claim 1 .

11 . The air conditioner according to claim 10 , further comprising a control unit configured to control an opening degree of the expansion valve such that a refrigerant that evaporates in the utilization heat exchanger and that flows out of the heat transfer tube serving has a dryness degree equal to or more than a predetermined value.

Assignees

• Daikin Ind Ltd

Inventors

• Kimura Tsuyoshi
• Tsuji Yoshiyuki
• Morikita Yusuke

Classifications

• F25B39/04

  Condensers · CPC title

• F25B39/02

  Evaporators · CPC title

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F25B2600/2513

  Expansion valves · CPC title

• F25B49/02

  for compression type machines, plants or systems · CPC title