Heat exchanger
A heat exchanger includes: a heat transfer pipe to guide a refrigerant; and a plurality of fins spaced apart from each other to allow air to pass in a first direction, the plurality of fins each having a through-hole through which the heat transfer pipe is installed, each of the plurality of fins includes a corrugated portion formed in a zigzag shape proceeding in the first direction and a sheet portion recessed from the corrugated portion around the through-hole to be parallel with the first direction, and an area of the sheet portion corresponds to 16% or more of an area of one unit among a plurality of units of the fin.
1 . A heat exchanger comprising:
a heat transfer pipe configured to guide a refrigerant; and
a plurality of fins spaced apart from each other to allow air to pass in a first direction, each the plurality of fins including:
a through-hole through which the heat transfer pipe is disposed;
a corrugated portion formed in a zigzag shape proceeding in the first direction; and
a sheet portion recessed from the corrugated portion around the through-hole, the sheet portion being parallel with the first direction,
wherein each of the plurality of fins includes a reference region, the reference region being defined by the through-hole, the corrugated portion and the sheet portion,
wherein within each reference region, an area of the sheet portion corresponds to 16%-25% of an area of the reference region,
wherein each sheet portion includes:
a first length in the first direction; and
a second length in a second direction, the second direction being perpendicular to the first direction,
wherein the second length is greater than the first length,
wherein each of the plurality of fins further includes a connecting portion to connect the corrugated portion and the sheet portion,
wherein each corrugated portion includes a plurality of inclined portions having an inclination with respect to the first direction,
wherein the plurality of inclined portions of each corrugated portion includes two crest portions and a trough portion,
wherein for each of the plurality of fins, the corrugated portion is formed in two inner inclined portions that are disposed between the two crest portions,
wherein the trough portion is positioned between the two inner inclined portions,
wherein the plurality of inclined portions of each corrugated portion includes outer inclined portions that define the two crest portions outside the two inner inclined portions,
wherein for each of the plurality of fins, a length of each outer inclined portion that does not overlap with the connecting portion in the first direction is less than a length of each inner inclined portion, and
wherein for each of the plurality of fins, the connecting portion is arranged to surround the sheet portion and separates the corrugated portion and the sheet portion.
2 . The heat exchanger of claim 1 , wherein for each of the plurality of fins, a ratio of the second length of the sheet portion to the first length of the sheet portion is in a range of 1.2 to 1.9.
3 . The heat exchanger of claim 1 , wherein for each of the plurality of fins, the sheet portion is configured such that a distance to the through-hole in the second direction is greater than a distance to the through-hole in the first direction.
4 . The heat exchanger of claim 1 , wherein each of the plurality of fins further includes a collar in surface contact with the heat transfer pipe, and
wherein for each of the plurality of fins, the sheet portion is connected to an outer surface of the collar.
5 . The heat exchanger of claim 4 , wherein at least one of the corrugated portions of the plurality of fins is disposed between adjacent sheet portions among the plurality of fins.
6 . The heat exchanger of claim 1 , wherein for each of the plurality of fins, a center of the through-hole overlaps the trough portion in the second direction.
7 . The heat exchanger of claim 1 , wherein for each of the plurality of fins, a combined area of the two inner inclined portions corresponds to 70% or more of the area of the sheet portion.
8 . The heat exchanger of claim 7 , wherein for each of the plurality of fins, an overlapping length between each inner inclined portion and each crest portion is greater than or equal to 50% of the second length of the sheet portion in the second direction.
9 . The heat exchanger of claim 7 , wherein for each of the plurality of fins, the two crest portions do not overlap the sheet portion in the second direction.
10 . The heat exchanger of claim 7 , wherein for each of the plurality of fins, the two crest portions are positioned higher than the sheet portion in a third direction, and
wherein the third direction is perpendicular to the first direction and to the second direction.
11 . The heat exchanger of claim 1 , wherein for each of the plurality of fins, a collar is formed through the sheet portion and protrudes upward and downward.
12 . An air conditioner comprising:
an indoor heat exchanger configured to exchange heat with indoor air; and
an outdoor heat exchanger configured to exchange heat with outdoor air,
wherein at least one of the indoor heat exchanger and the outdoor heat exchanger comprises:
a heat transfer pipe to guide a refrigerant; and
a plurality of fins spaced apart from each other to allow air to pass in a first direction, each of the plurality of fins including:
a through-hole through which the heat transfer pipe passes;
a corrugated portion formed in a zigzag shape proceeding in the first direction; and
a sheet portion recessed from the corrugated portion around the through-hole, the sheet portion being parallel with the first direction,
wherein each of the plurality of fins includes a reference region, the reference region being defined by the through-hole, the corrugated portion and the sheet portion,
wherein within each reference region, an area of the sheet portion corresponds to 16%-25% of an area of the reference region,
wherein each sheet portion includes:
a first length in the first direction; and
a second length in a second direction, the second direction being perpendicular to the first direction,
wherein the second length is greater than the first length,
wherein each of the plurality of fins further includes a connecting portion to connect the corrugated portion and the sheet portion,
wherein each corrugated portion includes a plurality of inclined portions having an inclination with respect to the first direction,
wherein the plurality of inclined portions of each corrugated portion includes two crest portions and a trough portion,
wherein for each of the plurality of fins, the corrugated portion is formed in two inner inclined portions that are disposed between the two crest portions,
wherein the trough portion is positioned between the two inner inclined portions,
wherein the plurality of inclined portions of each corrugated portion includes outer inclined portions that define the two crest portions outside the two inner inclined portions,
wherein for each of the plurality of fins, a length of each outer inclined portion that does not overlap with the connecting portion in the first direction is less than a length of each inner inclined portion, and
wherein for each of the plurality of fins, the connecting portion is arranged to surround the sheet portion and separates the corrugated portion and the sheet portion.