WO2024034585A1

WO2024034585A1 - Heat exchanger

Info

Publication number: WO2024034585A1
Application number: PCT/JP2023/028823
Authority: WO
Inventors: 文奥野; 寛之中野; 圭介今津; 健太郎安重; 健太久本
Original assignee: ダイキン工業株式会社
Priority date: 2022-08-12
Filing date: 2023-08-07
Publication date: 2024-02-15
Also published as: JP7453578B2; JP2024025576A

Abstract

A heat exchanger (10) comprises a heat transfer pipe (20) and a plurality of fins (30). The heat transfer pipe (20) extends in a first direction. The fins (30) are stacked in the first direction. The fins (30) each include a body portion (31) and a collar portion (32). The collar portion (32) allows the heat transfer pipe (20) to pass therethrough. The collar portion (32) has a first portion (33), a second portion (34), and a third portion (35). The first portion (33) extends from the body portion (31) in the first direction. The second portion (34) extends from the first portion (33) toward the heat transfer pipe (20). The third portion (35) extends from the second portion (34) in the first direction. A second portion (34) of a first fin (131) is in contact with the tip of a collar portion (32) of an adjacent second fin (132). The fins (30) are each provided with a drainage rib (130). The drainage rib (130) extends from a convex space (S) that is formed by a first portion (33) and the second portion (34) of the first fin (131) and the tip of the collar portion (32) of the second fin (132).

Description

Heat exchanger

Regarding heat exchangers.

Conventionally, as disclosed in Patent Document 1 (Japanese Unexamined Patent Publication No. 2015-123458), a heat exchanger such as an air conditioner includes a fin having a collar portion. The collar portion 10 shown in FIG. 1 of Patent Document 1 has a dish-shaped seat portion 11, a vertical cylindrical portion 12 above the seat portion 11, and a flared portion 13 above the seat portion 11.

The inventor of the present invention discovered that when the fins 1 shown in FIG. The problem was discovered that water easily enters the recess and accumulates in the convex space formed within the recess.

The heat exchanger of the first aspect includes a heat exchanger tube and a plurality of fins. The heat exchanger tube extends in the first direction. The plurality of fins are stacked in the first direction. The plurality of fins include a main body portion and a collar portion. The main body extends in a second direction intersecting the first direction. The heat exchanger tube is passed through the collar part. The collar part has a first part, a second part, and a third part. The first portion extends in a first direction from the main body. The second part extends from the first part toward the heat transfer tube. The third part extends from the second part in the first direction along the heat exchanger tube. The second portion of the first fin contacts the tip of the collar portion of the adjacent second fin. The fins are provided with drainage ribs. The drainage rib extends from a convex space formed by the first and second parts of the first fin and the tip of the collar part of the second fin.

In the heat exchanger of the first aspect, water tends to accumulate in the convex space formed by the first and second parts of the first fin and the tip of the collar part of the second fin. However, according to the heat exchanger of the first aspect, since the drainage rib extends from the convex space, water accumulated in the convex space can be guided to the drainage rib. Therefore, drainage of convex spaces where water tends to accumulate can be facilitated.

The heat exchanger of the second aspect is the heat exchanger of the first aspect, and the collar part further includes a fourth part. The fourth part extends toward the outer circumference from the third part. The second portion of the first fin contacts the fourth portion of the adjacent second fin.

In the heat exchanger of the second aspect, the fourth part allows the plurality of fins to be easily stacked in the first direction.

Further, in the heat exchanger according to the second aspect, there is a problem that water tends to accumulate in the convex space formed by the fourth part of the second fin and the first part and the second part of the first fin. is large, so the effect of the drainage ribs is large.

The heat exchanger of the third aspect is the heat exchanger of the first aspect or the second aspect, and the drainage rib is provided in the main body. The drainage rib protrudes in the first direction to the second portion.

In the heat exchanger of the third aspect, water in the convex space can be easily guided to the drainage ribs.

The heat exchanger according to the fourth aspect is the heat exchanger according to any one of the first to third aspects, and the fin includes a plurality of collar parts. The drainage rib extends in the second direction from the first collar to the lower collar.

In the heat exchanger of the fourth aspect, water in the convex space of the upper collar part can be guided to the convex space of the lower collar part through the drainage rib.

The heat exchanger according to the fifth aspect is the heat exchanger according to any one of the first to fourth aspects, and the convex space has an annular space when viewed from the first direction.

In the heat exchanger of the fifth aspect, the annular space allows water accumulated around the entire circumference of this space to be guided to the drainage rib.

The heat exchanger according to the sixth aspect is the heat exchanger according to the fifth aspect, and the convex space further includes a triangular space when viewed from the first direction. The triangular space is connected to the toroidal space. A drainage rib extends from the triangular space.

In the heat exchanger of the sixth aspect, water accumulated in the convex space can be moved to the triangular space and guided from the triangular space to the drainage rib.

The heat exchanger according to the seventh aspect is the heat exchanger according to any one of the first to sixth aspects, and is included in the indoor unit of the air conditioner.

The heat exchanger of the seventh aspect can be applied to a heat exchanger of an indoor unit of an air conditioner.

1 is a schematic configuration diagram of an air conditioner including a heat exchanger according to an embodiment of the present disclosure. FIG. 1 is a cross-sectional view of a heat exchanger according to an embodiment of the present disclosure. It is a perspective view when the fin which constitutes a heat exchanger is seen from the front. FIG. 3 is a plan view of fins constituting the heat exchanger, viewed from the rear. FIG. 3 is a plan view of the vicinity of one collar portion of the heat exchanger, viewed from the front. In FIG. 5, the third part and the fourth part are omitted, and the second part is shaded. 6 is a sectional view taken along line VII-VII in FIG. 5. FIG. 6 is a sectional view taken along line VIII-VIII in FIG. 5. FIG. 6 is a sectional view taken along line IX-IX in FIG. 5. FIG. It is a bottom view when the fin which constitutes a heat exchanger is seen from below. FIG. 4 is a diagram showing the flow of water. This is a photograph of the vicinity of the conventional collar section viewed from the front. This is a photograph of the vicinity of a plurality of conventional color sections viewed from the right side. FIG. 7 is a plan view of the vicinity of one collar portion of a heat exchanger according to a modified example, when viewed from the front. FIG. 7 is a plan view of the vicinity of one collar portion of a heat exchanger according to another modification as viewed from the front.

(1) Air conditioner An air conditioner including a heat exchanger according to an embodiment of the present disclosure will be described with reference to FIG. 1. As shown in FIG. 1, the air conditioner 200 is a device used for heating and cooling indoor rooms such as buildings by performing vapor compression type refrigeration cycle operation.

The air conditioner 200 mainly includes an outdoor unit 220, an indoor unit 230, and a liquid refrigerant communication pipe 240 and a gas refrigerant communication pipe 250 that connect the outdoor unit 220 and the indoor unit 230. The vapor compression type refrigerant circuit 210 of the air conditioner 200 is configured by connecting an outdoor unit 220 and an indoor unit 230 via a liquid refrigerant communication pipe 240 and a gas refrigerant communication pipe 250.

(1-1) Outdoor unit The outdoor unit 220 is installed outdoors. The outdoor unit 220 mainly includes a compressor 221, a flow path switching mechanism 222, an outdoor heat exchanger 223, and an expansion mechanism 224.

The compressor 221 is a mechanism that compresses the low pressure refrigerant in the refrigeration cycle until it becomes high pressure.

The flow path switching mechanism 222 is a mechanism that switches the direction of refrigerant flow when switching between cooling operation and heating operation. During cooling operation, the flow path switching mechanism 222 connects the discharge side of the compressor 221 to the gas side of the outdoor heat exchanger 223, and connects the gas side of the indoor heat exchanger 231 (described later) via the gas refrigerant communication pipe 250. and the suction side of the compressor 221 (see the solid line of the flow path switching mechanism 222 in FIG. 1). Further, during heating operation, the flow path switching mechanism 222 connects the discharge side of the compressor 221 and the gas side of the indoor heat exchanger 231 via the gas refrigerant communication pipe 250, and also connects the gas side of the outdoor heat exchanger 223. and the suction side of the compressor 221 (see the broken line of the flow path switching mechanism 222 in FIG. 1).

The outdoor heat exchanger 223 is a heat exchanger that functions as a radiator for refrigerant during cooling operation and as an evaporator for refrigerant during heating operation. The outdoor heat exchanger 223 has its liquid side connected to the expansion mechanism 224 and its gas side connected to the flow path switching mechanism 222.

During cooling operation, the expansion mechanism 224 reduces the pressure of the high-pressure liquid refrigerant that has radiated heat in the outdoor heat exchanger 223 before sending it to the indoor heat exchanger 231, and during heating operation, it reduces the pressure of the high-pressure liquid refrigerant that has radiated heat in the indoor heat exchanger 231 to the outside. This is a mechanism that reduces the pressure before sending it to the heat exchanger 223.

Further, the outdoor unit 220 is provided with an outdoor fan 225 for sucking outdoor air into the outdoor unit 220, supplying the outdoor air to the outdoor heat exchanger 223, and then discharging it outside the outdoor unit 220. .

(1-2) Indoor unit The indoor unit 230 is installed indoors. The indoor unit 230 mainly includes an indoor heat exchanger 231 and an indoor fan 232.

The indoor heat exchanger 231 is a heat exchanger that functions as a refrigerant evaporator during cooling operation and as a refrigerant radiator during heating operation. The indoor heat exchanger 231 has a liquid side connected to a liquid refrigerant communication pipe 240 and a gas side connected to a gas refrigerant communication pipe 250.

Further, the indoor unit 230 is provided with an indoor fan 232 for sucking indoor air into the indoor unit 230, supplying the indoor air to the indoor heat exchanger 231, and then discharging it outside the indoor unit 230. .

(1-3) Operation (1-3-1) Cooling operation When the air conditioner 200 performs cooling operation, the low-pressure refrigerant in the refrigeration cycle is sucked into the compressor 221, compressed to the high pressure in the refrigeration cycle, and then It is discharged. The high-pressure refrigerant discharged from the compressor 221 is sent to the outdoor heat exchanger 223 through the flow path switching mechanism 222. The high-pressure refrigerant sent to the outdoor heat exchanger 223 exchanges heat with outdoor air supplied by the outdoor fan 225 in the outdoor heat exchanger 223, and radiates heat. The high-pressure refrigerant that has radiated heat in the outdoor heat exchanger 223 is sent to the expansion mechanism 224 and is reduced in pressure to a low pressure in the refrigeration cycle. The low-pressure refrigerant whose pressure has been reduced in the expansion mechanism 224 is sent to the indoor heat exchanger 231 through the liquid refrigerant communication pipe 240. The low-pressure refrigerant sent to the indoor heat exchanger 231 exchanges heat with indoor air supplied by the indoor fan 232 in the indoor heat exchanger 231 and evaporates. As a result, the indoor air is cooled and blown into the room. The low-pressure refrigerant evaporated in the indoor heat exchanger 231 is sucked into the compressor 221 again through the gas refrigerant communication pipe 250 and the flow path switching mechanism 222.

(1-3-2) Heating Operation When the air conditioner 200 performs a heating operation, the low-pressure refrigerant in the refrigeration cycle is sucked into the compressor 221, compressed to the high pressure in the refrigeration cycle, and then discharged. The high-pressure refrigerant discharged from the compressor 221 is sent to the indoor heat exchanger 231 through the flow path switching mechanism 222 and the gas refrigerant communication pipe 250. The high-pressure refrigerant sent to the indoor heat exchanger 231 exchanges heat with indoor air supplied by the indoor fan 232 in the indoor heat exchanger 231 and radiates heat. As a result, indoor air is heated and blown into the room. The high-pressure refrigerant that has radiated heat in the indoor heat exchanger 231 is sent to the expansion mechanism 224 through the liquid refrigerant communication pipe 240 and is reduced in pressure to a low pressure in the refrigeration cycle. The low-pressure refrigerant whose pressure has been reduced in the expansion mechanism 224 is sent to the outdoor heat exchanger 223. The low-pressure refrigerant sent to the outdoor heat exchanger 223 exchanges heat with outdoor air supplied by the indoor fan 232 in the outdoor heat exchanger 223 and evaporates. The low-pressure refrigerant evaporated in the outdoor heat exchanger 223 is sucked into the compressor 221 again through the flow path switching mechanism 222 .

(2) Heat Exchanger (2-1) Overall Configuration A heat exchanger 10 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 11. In the following explanation, expressions indicating directions such as "top", "bottom", "left", "right", "front", "back", etc. are used as appropriate, but these are not commonly used. It represents each direction in the state, and is not limited.

The heat exchanger 10 of this embodiment is included in the indoor unit 230 of the air conditioner 200 in FIG. Specifically, the heat exchanger 10 is the indoor heat exchanger 231 shown in FIG. The heat exchanger 10 of this embodiment is a cross-fin tube heat exchanger.

As shown in FIG. 2, the heat exchanger 10 includes heat exchanger tubes 20 and a plurality of fins 30. Heat exchanger tube 20 extends in the first direction. The fins 30 are stacked in the first direction. The first direction here is the front-back direction. The heat exchanger 10 performs heat exchange between the refrigerant flowing inside the heat exchanger tubes 20 and the air flowing outside the heat exchanger tubes 20. The heat exchanger 10 allows heat exchange between air and refrigerant without mixing them with each other.

(2-2) Detailed configuration (2-2-1) Heat exchanger tubes The heat exchanger 10 of this embodiment includes a plurality of heat exchanger tubes 20. The plurality of heat exchanger tubes 20 are arranged in the second direction. The second direction intersects the first direction. The second direction here is perpendicular to the first direction. Specifically, the second direction is an up-down direction.

The heat exchanger tube 20 allows a refrigerant to flow inside. The heat exchanger tube 20 has a cylindrical shape. Here, the heat exchanger tube 20 is a round tube.

The heat exchanger tubes 20 are formed with through holes through which the refrigerant to be heat exchanged with indoor air in the heat exchanger 10 passes. The through hole of the heat exchanger tube 20 penetrates along the first direction. Here, the first direction is the longitudinal direction of the heat exchanger tube 20. Heat exchanger tube 20 is made of aluminum or aluminum alloy, for example.

(2-2-2) Fins The fins 30 increase the heat transfer area between the heat transfer tubes 20 and the indoor air, and promote heat exchange between the refrigerant and the indoor air. The fins 30 are in contact with the heat transfer tubes 20. The fins 30 are made of aluminum or aluminum alloy, for example.

The plurality of fins 30 are arranged in the first direction. The fins 30 are arranged so as to intersect (here, perpendicular to) the extending direction of the heat exchanger tubes 20 . In this embodiment, the plurality of fins 30 are arranged in parallel and at equal intervals. Note that in FIG. 2, two adjacent fins 30 are shown as a first fin 131 and a second fin 132.

The fin 30 has one side 30a shown in FIG. 3 and the other side 30b shown in FIG. 4. Here, the one surface 30a is the front surface when viewed from the front in the first direction. The other surface 30b is a rear surface when viewed from the rear in the first direction.

As shown in FIGS. 2 to 10, the plurality of fins 30 include a main body portion 31 and a collar portion 32. The main body portion 31 extends in a second direction intersecting the first direction. Here, the main body portion 31 extends in the up-down direction, which is the second direction orthogonal to the first direction. In this embodiment, the up-down direction is the direction of gravity. The main body portion 31 is a flat member.

As shown in FIGS. 3 and 4, the main body portion 31 is formed with a notch 31a for promoting heat transfer. A plurality of cutouts 31a are arranged in a third direction orthogonal to the first direction. Here, the third direction is the left-right direction. Moreover, the notch 31a extends in the second direction. Here, the notch 31a projects forward. In other words, the notch 31a protrudes from one side 30a toward the other side 30b of the adjacent fins 30.

As shown in FIG. 2, the collar portion 32 allows the heat exchanger tube 20 to pass through. Specifically, the collar portion 32 has a through hole through which the heat exchanger tube 20 is passed.

As shown in FIGS. 2 to 10, the collar section 32 includes a first section 33, a second section 34, a third section 35, and a fourth section 36. The first part 33, the second part 34, the third part 35, and the fourth part 36 are composed of one member. Here, the first part 33, the second part 34, the third part 35, and the fourth part 36 are formed by nesting processing.

The first portion 33 extends from the main body portion 31 in the first direction. Here, the first portion 33 is perpendicular to the main body portion 31 .

The second part 34 extends from the first part 33 toward the heat exchanger tube 20. In other words, the second portion 34 extends in the second direction. Here, the second part 34 is orthogonal to the first part 33. The second part will be described later.

The third portion 35 extends from the second portion 34 in the first direction along the heat exchanger tube 20. The third portion 35 is in contact with the heat exchanger tube 20 . Here, the third part 35 is orthogonal to the second part 34.

The fourth portion 36 extends from the third portion 35 toward the outer circumference. In other words, the fourth portion 36 extends in the second direction. Here, the fourth part 36 is orthogonal to the third part 35. The length of the fourth portion 36 in the second direction is smaller than the length of the second portion 34 in the second direction.

As shown in FIG. 2, the second portion 34 of the first fin 131 contacts the tip of the collar portion 32 of the adjacent second fin 132. Here, the second portion 34 of the first fin contacts the fourth portion 36 of the adjacent second fin. The second portion 34 and the fourth portion 36 extend in the same direction.

Here, the second part 34 will be explained. As shown in FIGS. 5 and 6, the second portion 34 has a distance between the inner circumferential surface 34a and the outer circumferential surface 34b when viewed from the first direction (front in FIGS. 5 and 6) (in front view). has a first dimension L1, and a portion where the distance between the inner circumferential surface 34a and the outer circumferential surface 34b is a second dimension L2. As shown in FIGS. 6 to 8, the second dimension L2 is larger than the first dimension L1.

In FIG. 6, the first dimension L1 is the dimension of a portion extending along the third direction orthogonal to the first direction. Specifically, the portion having the first dimension L1 is located at least at the left end and right end. Here, the portion having the first dimension L1 is a portion of the second portion 34 where a triangular portion 34d, which will be described later, is not arranged.

The second dimension L2 is the dimension of the portion extending along the second direction. Specifically, the portion having the second dimension L2 is located at at least one of the upper end and the lower end. Here, the portions having the second dimension L2 are the upper end and the lower end of the second portion 34.

In the present embodiment, the second portion 34 has a drop shape when viewed from the first direction (front in FIGS. 5 and 6). In other words, the second portion 34 has an annular annular portion 34c and a triangular triangular portion 34d when viewed from the first direction (front in FIGS. 5 and 6). . The triangular portion 34d is continuous with a part of the annular portion 34c. In FIGS. 5 and 6, the triangular portion 34d has a V-shape.

The annular portion 34c is an area surrounded by two concentric circles. The annular portion 34c is located on the entire circumference of the second portion 34. Only the annular portion 34c without the triangular portion 34d constitutes a portion having the first dimension L1. Therefore, the first dimension L1 in this embodiment is a constant value.

The triangular portion 34d and the annular portion 34c form a portion having the second dimension L2. Therefore, the second dimension L2 of this embodiment is not a constant value. Specifically, the second dimension L2 is a value larger than the first dimension L1 of the annular portion 34c, and the value differs depending on the position. The maximum value of the second dimension L2 is, for example, twice or more the first dimension L1. The maximum value of the second dimension L2 here is the distance extending downward (inner circumferential surface 34a) from the upper end of the second portion 34, and the distance extending upward (inner circumferential surface 34a) from the lower end of the second portion 34. .

The triangular portion 34d is arranged at the lower end of the second portion 34. Specifically, the triangular portion 34d has a shape that extends downward. Here, the triangular portion 34d is also arranged at the upper end of the second portion 34. Specifically, the triangular portion 34d also has a shape that extends upward.

Note that the first dimension L1 is, for example, 0.5 mm or more and 0.9 mm or less. The second dimension L2 is, for example, 1.0 mm or more and 1.9 mm or less. The maximum value of the second dimension L2 is, for example, 1.5 mm or more and 1.9 mm or less.

As shown in FIGS. 3 to 6, 9, and 10, the fins 30 are provided with drainage ribs 130. The drainage rib 130 extends from a convex space S formed by the first part 33 and the second part 34 of the first fin 131 and the tip of the collar part 32 of the second fin 132 shown in FIG. . The drainage rib 130 allows water in the convex space S to flow in the second direction (here, downward).

The convex space S of this embodiment is formed by the first part 33 and the second part 34 of the first fin 131 and the fourth part 36 of the second fin 132. Specifically, the tip of the collar portion 32 of the second fin 132 (the fourth portion 36 in FIG. 2) enters the recess around the collar portion 32 of the first fin 131 adjacent to the second fin 132, and A convex space S is formed within the recess.

Specifically, the convex space S has a drop shape when viewed from the first direction (here, the front). In other words, the convex space S includes an annular space and a triangular space when viewed from the first direction. An annular space is provided around the entire circumference. The triangular space is connected to the annular space. The triangular space of this embodiment is provided at the upper end and the lower end.

Note that the convex space S formed by the first dimension L1 of the first part 33 and second part 34 of the first fin 131 and the fourth part 36 of the second fin 132 is, for example, , 0.1 mm or more and 0.3 mm or less. The convex space S formed by the second dimension L2 of the first part 33 and second part 34 of the first fin 131 and the fourth part 36 of the second fin 132 is, for example, 0. .4 mm or more and 1.4 mm or less. It is formed by the portion (upper end and lower end) of the first portion 33 and second portion 34 of the first fin 131 having the maximum second dimension L2, and the fourth portion 36 of the second fin 132. The convex space S is, for example, 1.1 mm or more and 1.4 mm or less.

As shown in FIGS. 3, 4, and 9, the drainage rib 130 is provided on the main body portion 31. As shown in FIGS. 3, 4, 9, and 10, the drainage rib 130 protrudes in the first direction. Here, the drainage rib 130 projects forward. Specifically, the drainage rib 130 protrudes from one side 30a toward the other side 30b of the adjacent fins 30. In this embodiment, as shown in FIGS. 9 and 10, the drainage rib 130 protrudes in the first direction to the second portion 34. As shown in FIGS. In other words, the height of the drainage rib 130 in the first direction is the same as the height of the second portion 34. In other words, the position of the drainage rib 130 in the first direction and the position of the second portion 34 in the first direction are the same.

Specifically, as shown in FIGS. 3 and 10, the drainage rib 130 has a mountain shape when viewed from one side 30a (front), and as shown in FIGS. When viewed from the rear) side, it has a groove shape. The drainage rib 130 of this embodiment has a V-shape when viewed from below.

As shown in FIGS. 3 and 4, the drainage rib 130 extends in the second direction. In this embodiment, the drainage rib 130 extends in the vertical direction, and here extends in the direction of gravity.

Specifically, the drainage rib 130 extends in the second direction from the first collar part 32 to the lower collar part 32. Here, in the first collar part 32 and the second collar part 32 that are adjacent to each other in the vertical direction, the drainage rib 130 extends from the lower end of the second part of the first collar part 32 in the upper part to the second part in the lower part. It extends to the upper end of the second portion 34 of the collar portion.

The drainage rib 130 is connected to a portion of the second portion 34 having the second dimension L2. Specifically, the drainage rib 130 is connected to the triangular portion 34d of the second portion 34. More specifically, the drainage rib 130 is connected to a pointed portion of the triangular portion 34d of the second portion 34. The drainage rib 130 extends from the triangular space of the convex space S.

(2-3) Operation When the air conditioner 200 shown in FIG. . Then, the refrigerant flowing through the through holes of the heat exchanger tubes 20 and the indoor air flowing outside the heat exchanger tubes 20 exchange heat. At this time, condensed water (hereinafter also referred to as water) may be generated on the fins 30. This water flows into a convex space S formed by the first part 33 and second part 34 of the first fin 131 and the fourth part 36 which is the tip of the collar part 32 of the second fin 132. Easy to accumulate.

In contrast, the second portion 34 of the fin 30 of the present embodiment has a portion where the distance between the inner circumferential surface 34a and the outer circumferential surface 34b is the first dimension L1 when viewed in the first direction, and a portion where the distance between the inner circumferential surface 34a and the outer circumferential surface 34b is the first dimension L1, and the inner circumferential surface 34a and a portion where the distance between the outer peripheral surface 34b and the outer peripheral surface 34b is a second dimension L2, which is larger than the first dimension L1. With this structure, water accumulated in the space between the portion of the first fin 131 having the first dimension L1 and the fourth portion 36 of the second fin 132 can be removed from the portion having the second dimension L2 and the second fin 132. The fourth part 36 can be guided into the space.

Further, the fin 30 of this embodiment has a convex portion formed by the first portion 33 and the second portion 34 of the first fin 131 and the fourth portion 36 which is the tip of the collar portion 32 of the second fin 132. It has a drainage rib 130 extending from the shaped space S. Since the drainage rib 130 extends from the convex space S, water accumulated in the convex space S can be guided to the drainage rib 130. Water is drained by the drainage ribs 130.

Specifically, as shown in FIG. 11, in the convex space S, an annular space is formed between the portion of the first fin 131 having the first dimension L1 and the fourth portion 36 of the second fin 132. The accumulated water is guided into a triangular space between the lower portion having the second dimension L2 and the fourth portion 36 of the second fin 132. Since the drainage rib 130 is connected to the portion having the second dimension L2, water guided into the triangular space formed by the portion having the second dimension L2 is further guided to the drainage rib 130. Thereby, water flows along the groove formed on the other surface 30b side of the drainage rib 130 to the collar portion 32 below. In this way, the condensed water adhering to the fins 30 is caused to flow downward.

(3) Features (3-1)
The present inventor has provided a collar portion 32 having a first portion 33, a second portion 34, and a third portion 35, and the second portion 34 of the first fin 131 is connected to the adjacent second fin 132. We have discovered a problem unique to the heat exchanger 10 that is in contact with the tip of the collar portion 32 of the heat exchanger 10. Specifically, as shown in FIGS. 12 and 13, in a conventional fin 330 that does not have a drainage rib 130, the first part 33 and second part 34 of the first fin 131 are It has been found that water tends to accumulate in the convex space S formed by the tip of the collar portion 32 of the second fin 132. In order to solve this problem, as a result of intensive study, we came up with the heat exchanger 10 of this embodiment.

The heat exchanger 10 according to the present embodiment includes a heat exchanger tube 20 and a plurality of fins 30. Heat exchanger tube 20 extends in the first direction. The plurality of fins 30 are stacked in the first direction. The plurality of fins 30 include a main body portion 31 and a collar portion 32. The main body portion 31 extends in a second direction intersecting the first direction. The heat exchanger tube 20 passes through the collar portion 32 . The collar section 32 includes a first section 33, a second section 34, and a third section 35. The first portion 33 extends from the main body portion 31 in the first direction. The second portion 34 extends from the first portion 33 toward the heat exchanger tube 20 . The third portion 35 extends from the second portion 34 in the first direction along the heat exchanger tube 20. The second portion 34 of the first fin 131 contacts the tip of the collar portion 32 of the adjacent second fin 132. The fins 30 are provided with drainage ribs 130. The drainage rib 130 extends from a convex space S formed by the first part 33 and the second part 34 of the first fin 131 and the tip of the collar part 32 of the second fin 132.

According to the heat exchanger 10 of the present embodiment, since the drainage rib 130 extends from the convex space S, water accumulated in the convex space S can be guided to the drainage rib 130. Therefore, drainage of the convex space S where water tends to accumulate can be facilitated.

In this way, it is possible to suppress the accumulation of water on the fins 30 and improve drainage performance, thereby reducing the chance that the heat exchanger 10 remains wet. Therefore, corrosion of the heat exchanger tubes 20 and fins 30 can be suppressed. Moreover, since the generation of mold in the heat exchanger 10 can be suppressed, the problem of odor can be reduced.

(3-2)
In the heat exchanger 10 of this embodiment, the collar part 32 further includes a fourth part 36. The fourth portion 36 extends from the third portion 35 toward the outer periphery. The second portion 34 of the first fin 131 contacts the fourth portion 36 of the adjacent second fin 132.

Here, the fourth portion 36 allows the plurality of

fins

30, 131, and 132 to be easily stacked in the first direction.

In addition, there is a noticeable problem that water tends to accumulate in the convex space S formed by the fourth part 36 of the second fin 132 and the first part 33 and second part 34 of the first fin 131. , the effect of having the second portion 34 of this embodiment is great.

(3-3)
In the heat exchanger 10 of this embodiment, the drainage rib 130 is provided on the main body portion 31. The drainage rib 130 protrudes in the first direction to the second portion 34 . Here, the water in the convex space S can be easily guided to the drainage ribs.

(3-4)
In the heat exchanger 10 of this embodiment, the fins 30 include a plurality of collar parts 32. The drainage rib 130 extends in the second direction from the first collar portion 32 to the lower collar portion 32 .

Here, water in the convex space S of the upper collar part 32 can be led to the convex space S of the lower collar part 32 through the drainage rib 130.

(3-5)
In the heat exchanger 10 of this embodiment, the convex space S has an annular space when viewed from the first direction.

Here, the annular space allows water accumulated around the entire circumference of this space to be guided to the drainage ribs 130.

(3-6)
In the heat exchanger 10 of this embodiment, the convex space S further includes a triangular space when viewed from the first direction. The triangular space is connected to the toroidal space. The drainage rib 130 extends from the triangular space.

Here, the water accumulated in the convex space S can be moved to the triangular space and guided from the triangular space to the drainage rib 130.

(3-7)
In the heat exchanger 10 of this embodiment, it is included in the indoor unit 230 of the air conditioner 200. In this way, the heat exchanger 10 of this embodiment is suitably used as an indoor heat exchanger 231 placed indoors.

(4) Modification example (4-1) Modification example 1
In the embodiment described above, the drainage rib 130 has a V-shape when viewed from below, but is not limited to this. The drainage rib 130 of this modification has a U-shape when viewed from below.

(4-2) Modification example 2
In the embodiment described above, the triangular portion 34d has a V-shape when viewed from the first direction, but the triangular portion 34d is not limited to this. The triangular portion 34d of this modification is U-shaped.

(4-3) Modification 3
In the embodiment described above, the portions having the second dimension L2 (the triangular portions 34d in FIGS. 3 to 6) are arranged at both ends in the second direction, but the invention is not limited thereto. In this modification, as shown in FIG. 14, the portion having the second dimension L2 is arranged only at the lower end. In other words, the triangular portion 34d is not arranged at the upper end but only at the lower end.

(4-4) Modification example 4
In the embodiment described above, the triangular spaces of the convex space S are provided at both ends in the second direction when viewed from the first direction, but the present invention is not limited thereto. In this modification, the triangular space of the convex space S is provided only at the lower end. In other words, the upper end of the convex space S is provided with an annular space.

(4-5) Modification example 5
In the embodiment described above, the portions having the second dimension L2 (the triangular portions 34d in FIGS. 3 to 6) are arranged at both ends in the second direction, but the invention is not limited thereto. In this modification, as shown in FIG. 15, the portion having the second dimension L2 is omitted. In other words, the second portion 34 has an annular shape when viewed from the first direction.

(4-6) Modification example 6
In the embodiment described above, the triangular spaces of the convex space S are provided at both ends in the second direction when viewed from the first direction, but the present invention is not limited thereto. In this modification, the triangular space of the convex space S is omitted. In other words, the convex space S is an annular space.

(4-7) Modification example 7
In the embodiment described above, the collar part 32 includes a first part 33, a second part 34, a third part 35, and a fourth part 36, but the fourth part 36 is omitted. Good too.

(4-8) Modification example 8
In the embodiment described above, the notches 31a for promoting heat transfer are formed in the fins 30, but the shape, number, arrangement, etc. of the notches 31a are not limited. The cutout 31a may extend in a direction intersecting the second direction. Moreover, the notch 31a may protrude toward the rear.

(4-9) Modification 9
In the embodiment described above, the heat exchanger 10 is applied to the indoor heat exchanger 231, but is not limited thereto. In this modification, the heat exchanger 10 is applied to an outdoor heat exchanger 223.

(4-10) Modification example 10
In the embodiment described above, the heat exchanger 10 is applied to the air conditioner 200, but is not limited thereto. The heat exchanger 10 may be applied to a refrigeration device such as a water heater, a floor heating device, or a refrigerator.

Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as described in the claims. .

10 : Heat exchanger 20 :

Heat exchanger tubes

30, 131, 132 : Fin 31 : Main body part 32 : Collar part 33 : First part 34 : Second part 35 : Third part 36 : Fourth part 130 : Drainage rib 200 :Air conditioner 230 :Indoor unit

Japanese Patent Application Publication No. 2015-123458

Claims

a heat exchanger tube (20) extending in a first direction;
a plurality of fins (30, 131, 132) stacked in the first direction;
Equipped with
The plurality of fins are
a main body (31) extending in a second direction intersecting the first direction;
a collar part (32) through which the heat exchanger tube passes;
including;
The collar part is
a first part (33) extending from the main body in the first direction;
a second part (34) extending from the first part toward the heat exchanger tube;
a third part (35) extending in the first direction from the second part along the heat exchanger tube;
has
The second portion of the first fin (131) is in contact with the tip of the collar portion of the adjacent second fin (132),
The fins are provided with drainage ribs (130),
The drainage rib extends from a convex space (S) formed by the first part and the second part of the first fin and the tip of the collar part of the second fin.
Heat exchanger (10).
The collar part further includes a fourth part (36) extending from the third part to the outer peripheral side,
The two portions of the first fin are in contact with the fourth portion of the adjacent second fin,
The heat exchanger according to claim 1.
The drainage rib is provided on the main body,
The drainage rib protrudes in the first direction to the second portion.
The heat exchanger according to claim 1 or 2.
The fin includes a plurality of the collar portions,
The drainage rib extends in the second direction from the first collar portion to the lower collar portion.
The heat exchanger according to any one of claims 1 to 3.
The convex space has an annular space when viewed from the first direction,
The heat exchanger according to any one of claims 1 to 4.
The convex space further includes a triangular space that is continuous with the annular space when viewed from the first direction,
The drainage rib extends from the triangular space.
The heat exchanger according to claim 5.
The heat exchanger according to any one of claims 1 to 6, which is included in an indoor unit (230) of an air conditioner (200).