WO2015097761A1 - Heat exchanger and outdoor unit provided with this heat exchanger - Google Patents

Abstract

Provided is a heat exchanger (10) in which heat exchanging units (12) comprise a plurality of fins (13) disposed in parallel and a plurality of heat-transfer pipes (14) disposed so as to be perpendicular to the fins (13). The heat exchanging units are stacked vertically in a plurality of stages. In plan view, the heat exchanger (10) is formed in a U-shape or a deformed U-shape. The fins (13a, 13c) in the intermediate portion of the uppermost-stage heat exchangers (12A, 12C) are provided with a suspension part (20) configured from an opening which enables hanging by a suspension support member (30) that is separate from the heat exchanger.

Description

Heat exchanger and outdoor unit equipped with this heat exchanger

The present invention relates to a heat exchanger mounted on, for example, an outdoor unit of an air conditioner, and an outdoor unit including the heat exchanger.

An outdoor unit of an air conditioner installed in a building or commercial facility has a heat exchanger in the housing. The heat exchanger is configured by stacking a plurality of heat exchanging portions in the vertical direction, each having a plurality of fins and a plurality of heat transfer tubes arranged to be orthogonal to the plurality of fins. This type of heat exchanger has problems such as collapse of fins due to vibration during transportation, drop impact, etc., and relative displacement of the upper and lower heat exchange parts, and techniques for improving these have been proposed. (For example, refer to Patent Document 1).

In Patent Document 1, side plates are installed at both ends of the upper and lower heat exchangers to reinforce fins, and the side plates are fixed to the casing of the outdoor unit so that the heat exchanger is supported by the casing. . As an effect, it is disclosed that the fins of the heat exchanger are prevented from being deformed by buckling.

JP 2006-317099 A (page 5, page 6, FIGS. 3 to 6)

The heat exchanger of Patent Document 1 is configured in an L shape when seen in a plan view. If such an L-shaped or I-shaped heat exchanger is used, the heat exchanger is enclosed by a side plate. By supporting the body, fin buckling can be prevented. However, in the case of a U-shaped heat exchanger in plan view, both ends of the U-shape can be supported by the casing using side plates, but the U-shaped intermediate portion cannot be supported. For this reason, in a U-shaped heat exchanger in plan view, a technology is required that can prevent the fins from being crushed by transporting them and causing the lower end of the fins to be easily crushed by the base plate when the outdoor unit is dropped. ing.

The present invention has been made to solve the above problems, and in a U-shaped or deformed U-shaped heat exchanger in plan view, the collapse of fins against vibration and drop impact during transportation and installation. It is an object of the present invention to provide a heat exchanger capable of suppressing the minimum temperature and an outdoor unit equipped with the heat exchanger.

A heat exchanger according to the present invention includes a plurality of fins arranged side by side and a plurality of heat transfer tubes arranged so as to be orthogonal to the fins. The heat exchanger formed in a U-shape or a deformed U-shape as viewed in FIG. 2, the fins in the middle of the uppermost heat exchange section are suspended from a suspension support member separate from the heat exchanger It is provided with a suspension part composed of possible openings.

According to the present invention, when the heat exchanger is transported, the heat exchanger is transported in a state of being suspended from the suspension support member by the suspension portion provided on the fin at the intermediate portion of the uppermost heat exchange portion. Therefore, in a U-shaped or deformed U-shaped heat exchanger in plan view, it is possible to minimize the collapse of the fins against vibration and drop impact during transportation and installation.

It is a perspective view of the outdoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is a perspective view for demonstrating the heat exchanger of a multistage structure. It is explanatory drawing of the assembly procedure of the heat exchanger which concerns on Embodiment 1 of this invention. It is explanatory drawing of the assembly process following FIG. It is explanatory drawing of the assembly process following FIG. It is a figure which shows the fin and heat exchanger tube of the conventional heat exchanger. It is explanatory drawing of the suspension structure of the heat exchanger which concerns on Embodiment 1 of this invention. It is a figure which shows the fin and heat exchanger tube in the state by which the suspension support member was installed in the heat exchanger which concerns on Embodiment 1 of this invention. It is a figure which shows the fin and heat exchanger tube before a suspension support member is installed in the heat exchanger which concerns on Embodiment 1 of this invention. It is a figure which shows the modification of the position of a hanging part. It is a figure which shows the modification of the holding hole of a hanging part. It is an enlarged view of the fin of the upper side heat exchange part of the heat exchanger which concerns on Embodiment 2 of this invention. It is explanatory drawing of the heat exchanger which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
1 is a perspective view of an outdoor unit for an air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 2 is a perspective view for explaining a heat exchanger having a multi-stage configuration. In FIG. 2, the fins are partially deleted. In FIG. 1 and the drawings to be described later, the same reference numerals are the same or equivalent, and this is common throughout the entire specification. Furthermore, the forms of the constituent elements appearing in the entire specification are merely examples and are not limited to these descriptions.

As shown in FIG. 1, the outdoor unit 1 of this air conditioner has a large and vertically long casing 2, and each of the left side panel 2a, the right side panel 2b, and the back panel 2c of the casing 2 includes An air inlet 3 for taking in air is provided. As described above, the air suction port 3 is formed on three of the four side surfaces of the housing 2, and the fan guard 4 is provided on the upper surface panel 2 d of the housing 2 so as to protrude upward. Is formed. The front panel 6 of the housing 2 includes a front panel_upper 2e and a front panel_lower 2f that are opened and closed when the inside of the housing 2 is maintained. In addition, the front surface, back surface, and left and right side surfaces used in the following description mean directions in which the outdoor unit is viewed from the front panel 6 side in FIG.

The heat exchanger 10 is disposed on the back side in the housing 2. The heat exchanger 10 has a configuration in which the heat exchanging portions 12 (12A to 12D) are arranged one above the other and arranged in another row in the front-rear direction to form two rows. The heat exchange unit 12 includes a plurality of fins 13 (13a to 13d) arranged in parallel and a plurality of heat transfer tubes 14 (14a to 14d) arranged so as to be orthogonal to the plurality of fins 13. The heat transfer tube 14 is made of aluminum or an aluminum alloy. Further, the heat exchanger 10 is formed in a substantially U shape when seen in a plan view, and includes a back surface portion 10a disposed to face the back panel 2c in the housing 2, and bent portions on both sides of the back surface portion 10a. 10b and a side surface portion 10c extending opposite to each other. In the first embodiment, the heat exchanger is formed in a substantially U shape when seen in a plan view. However, the heat exchanger is not limited to this. Furthermore, it is good also as a deformation | transformation U shape bent inside.

In the following, for convenience of explanation, the upper heat exchange section 12 on the rear side (front side in FIG. 2) is the upper heat exchange section 12A, the lower heat exchange section 12 on the rear side is the lower heat exchange section 12B, and the upper front section is on the front side. The heat exchanging part 12 may be distinguished as the upper heat exchanging part 12C, and the lower heat exchanging part 12 on the front side may be distinguished as the lower heat exchanging part 12D. Similarly for the fins 13 and the heat transfer tubes 14, the fins 13 are distinguished as fins 13a, 13b, 13c, and 13d in the order of the rear side upper step, the rear side lower step, the front side upper step, and the front side lower step, and the heat transfer tube 14 is changed. The heat transfer tubes 14a, 14b, 14c, and 14d may be distinguished.

Next, the assembly procedure of the heat exchanger of the outdoor unit 1 of the air conditioner according to Embodiment 1 will be described.

FIG. 3 is an explanatory diagram of a procedure for assembling the heat exchanger according to Embodiment 1 of the present invention. 3A is a view showing a heat exchanging portion before bending, FIG. 3B is a view showing a heat transfer tube of FIG. 3A, and FIG. 3C is FIG. 3A. It is the enlarged arrow line view which looked at the part for one row of the heat exchange part from the arrow a direction.
When assembling the heat exchanger 10, first, the heat transfer tubes 14 bent in a U-shape are arranged side by side, fins 13 are inserted from the open end side of the heat transfer tubes 14, and the I-shaped heat exchange portion 12 is Form. In the first embodiment, since the heat exchanging units 12 have a two-stage configuration with two rows, four heat exchanging units 12 are configured. Although FIG. 3 shows a case where the heat transfer tube 14 is a flat tube, the heat transfer tube 14 is not limited to a flat tube and may be a circular tube.

FIG. 4 is an explanatory diagram of an assembly process subsequent to FIG. FIG. 5 is an explanatory diagram of an assembly process subsequent to FIG.
The I-shaped heat exchange sections 12 configured as shown in FIG. 3 are stacked in two rows, and as shown in FIG. 5, the number of the stacked two rows is stacked up and down (here, two steps). Place them side by side. And the heat exchange parts 12 (12A and 12B, 12C and 12D) adjacent to the up-down direction are connected by the sheet metal (not shown) provided in the right and left of the heat exchange part 12. FIG. Moreover, the heat exchange parts 12 (12A and 12C, 12B and 12D) adjacent to each other in the row direction are also connected by sheet metal (not shown). However, when the heat exchange unit 12 is bent in a U shape starting from the left end of the heat exchange unit 12 in FIG. 4, the position of the right end of each heat exchange unit 12 as shown in FIG. Therefore, the right side of the heat exchange unit 12 is connected after being bent into a U shape. Thereby, about the right-and-left edge part of the heat exchange part 12, the heat exchanger tube 14 and the fin 13 are supported with a sheet metal.

Next, as shown in FIG. 5, U-bends 15 or headers are connected to the end portions of the heat transfer tubes 14 of the heat exchange units 12 in the upper heat exchange units 12A and 12C and the lower heat exchange units 12B and 12D connected. 16 is brazed to form a circuit through which the refrigerant flows. Then, the bending process is performed as shown in FIG. 5 to complete the substantially U-shaped heat exchanger 10. In the heat exchanger 10 configured as described above, both end portions thereof are reinforced with sheet metal, but the back surface portion 10a does not support the weight of the heat exchanger 10, and supports the heat transfer tube 14 in the vertical direction. The thing is only the buckling strength of the fin 13. Therefore, if no measures are taken for the fins 13, deformation due to buckling is likely to occur. This point will be described with reference to FIG.

FIG. 6 is a diagram showing fins and heat transfer tubes of a conventional heat exchanger.
In the conventional heat exchanger, it is the lowermost part of the upper heat exchanging portion 101 and is in contact with the fins of the lower heat exchanging portion 102 (ideally line contact, but if there is even a slight distortion or inclination of the fins) Deformation due to buckling is likely to occur around a point 103 that is close to point contact. Further, since the lowermost portion 104 of the lower heat exchanging portion 102 is subjected to the weight of both the upper heat exchanging portion 101 and the lower heat exchanging portion 102, deformation due to buckling is most likely to occur.

Therefore, in the first embodiment, the structure described below is adopted in order to suppress these bucklings. That is, in the heat exchanger 10 according to the first embodiment, the back surface portion 10a of the uppermost upper heat exchanging portions 12A and 12C is suspended from the housing 2 by using a suspension support member 30 and a support metal plate 40 described later. Possible structure. Hereinafter, a specific structure will be described.

FIG. 7 is an explanatory diagram of the hanging structure of the heat exchanger according to Embodiment 1 of the present invention. FIG. 8 is a diagram showing the fins and the heat transfer tubes in a state where the suspension support member is installed in the heat exchanger according to Embodiment 1 of the present invention. FIG. 9 is a diagram showing fins and heat transfer tubes of the heat exchanger according to Embodiment 1 of the present invention. In FIG. 7 and FIG. 8, white arrows indicate the air flow direction. Since the structure of the uppermost upper heat exchange units 12A and 12C in the heat exchanger 10 is the same, the upper heat exchange unit 12A will be described as a representative here.

In the back surface portion 10a of the heat exchanger 10, a suspending portion 20 is formed on the upper side of the fin 13a. Specifically, the suspending portion 20 is configured by a notch, and is continuous from the insertion hole 21 and the insertion hole 21 that opens from the windward or leeward side edge of the fin 13 a toward the opposite side edge. And a circular holding hole 22 opening upward. The position where the hanging part 20 is provided is the back surface part 10a as described above, and this corresponds to the "intermediate part of the heat exchange part" of the present invention. The same applies to the case where the heat exchanger 10 has a deformed U shape in plan view, and the back surface portion facing the back surface in the housing 2 corresponds to the “intermediate portion of the heat exchange portion” of the present invention.

Although FIG. 9 shows the shape of one fin, since a plurality of fins 13 are arranged in parallel at intervals, the upper heat exchange is achieved by connecting the circular holding holes 22 at intervals. A cylindrical space extending in a direction orthogonal to the air flow direction is formed in the portion 12A. When the heat exchanger 10 is transported, the suspension support member 30 is latched and held in the cylindrical space, and fixed to the support metal plate 40 fixed to the inside of the housing 2 with bolts 41 as shown in FIG. To do. More specifically, the suspension support member 30 includes a rod-shaped support portion 31 made of round steel having the same shape as the columnar space formed by the holding hole 22 of the suspension portion 20, and both ends of the support portion 31. And the fixing portion 32 provided. The supporting portion 31 is inserted from the insertion hole 21 side of the suspending portion 20 to be positioned in the holding hole 22, and the fixing portion 32 of the suspending support member 30 is attached to the support metal plate 40. Secure with bolts 41. As a result, the upper heat exchanging portion 12 </ b> A is suspended from the housing 2 by the suspension support member 30 via the support metal plate 40. The upper heat exchange unit 12C is also suspended from the housing 2 in the same manner.

Note that the structure for fixing the suspension support member 30 to the support metal plate 40 is not limited to the fixing with the bolts 41. Since the suspension support member 30 is removed from the support sheet metal 40 and the heat exchanger 10 after installation after transportation, any structure may be used as long as it is detachably connected to the housing 2 (fixed to the support sheet metal 40).

Here, since each fin 13 is in line contact with the suspension support member 30 through the holding hole 22 of the suspension portion 20, the load is dispersed and buckling is unlikely to occur. And of course, since the upper heat exchange parts 12A and 12C are suspended from the housing 2, almost no load is applied to the lowermost parts of the upper heat exchange parts 12A and 12C, and the fins 13a and 13c of the upper heat exchange parts 12A and 12C. There will be no crushing at the bottom. Moreover, since only the load of lower heat exchange part 12B, 12D is applied also to the lowest part of lower heat exchange part 12B, 12D, there exists a merit which the collapse of fin 13b, 13d becomes small.

By the way, generally, when the fins are crushed, the drainage of water generated on the surface of the fins during defrosting is deteriorated, and the water remaining without being drained may freeze during operation. In this case, the heat transfer tube may be damaged due to the growth of ice. However, even if buckling occurs in the holding hole 22 portion in the first embodiment, since the holding hole 22 is located on the upper side of the fin 13, the amount of drainage is small, and the heat transfer tube 14 is damaged due to freezing. The problem is less likely to occur.

In the first embodiment, the direction of the notch of the hanging portion 20 is reversed in the fins 13a and 13c. That is, the hanging portions 20 of the fins 13a and 13c are notches opened outward. Specifically, as shown in FIGS. 7 and 8, in the upper side heat exchange part 12A on the back side (uppermost wind side), the suspension part 20 is provided by cutting out from the windward side edge of the fin 13a. On the other hand, in the upper side heat exchange part 12C on the front side (the leeward side), the hanging part 20 is provided by cutting out from the leeward side edge of the fin 13c. Thereby, each of the heat exchange part 12 of 2 rows structure can be suspended from the support metal plate 40.

Further, since the heat exchanger 10 is substantially U-shaped, the suspension support member 30c of the upper heat exchange section 12C on the front side has a holding hole more than the suspension support member 30a of the upper heat exchange section 12A on the rear side. The length of the support portion 31 held by 22 is shortened.

As described above, according to the first embodiment, the suspending portion 20 formed of a notch is provided on the upper side of the fin 13 of the back surface portion 10a of the upper heat exchange portions 12A and 12C. The upper heat exchange units 12 </ b> A and 12 </ b> C are suspended from the housing 2 by the suspension support member 30 inserted into the suspension unit 20. As a result, the weight of the fins can be supported by the back surface portion 10a, and in the U-shaped heat exchanger 10, it is possible to minimize the collapse of the fins against vibration and drop impact during transportation and installation. is there.

That is, the load at the time of transportation and dropping can be distributed not only to the lowermost end of the fins but also to the hanging part 20, and in each of the upper heat exchange parts 12A and 12C and the lower heat exchange parts 12B and 12D, the fin 13 It is possible to suppress the deformation at the lowest end of. In addition, since the fin 13 is plate-shaped, the strength on the compression side (buckling side) is weak, but since the strength on the tension side is excellent, it is advantageous to use a suspended shape. In addition, the same effect is acquired also when the heat exchanger 10 is made into a deformation | transformation U shape.

Further, if the fins 13 are crushed, the design will be deteriorated. However, since the deformation of the fins 13 can be minimized as described above in the first embodiment, the design is improved. be able to.

Moreover, since the deformation | transformation of the lowermost end of each fin 13 of upper side heat exchange part 12A, 12C and lower side heat exchange part 12B, 12C can be suppressed, the drainage property at the time of a defrost can be improved functionally. There is an effect of preventing damage to the heat exchanger 10 due to water icing.

In addition, by providing the suspending portion 20 on the upper part of the heat exchanger 10, many parts of the heat exchanger 10 are suspended so that no buckling load is applied to the fins 13.

Further, since the suspension support member 30 is detachably attached to the fins 13 and the support sheet metal 40, the design surface can be taken into consideration by removing the suspension support member 30 after installation after transportation.

In addition, the hanging part 20 has a holding hole 22 that is convex upward, and the position of the hanging support member 30 is stabilized at the holding hole 22, so that the hanging support member 30 is suspended by vibration during transportation. It can be prevented from coming off from 20.

Moreover, since the heat exchanger 10 is composed of a plurality of heat exchanging units 12 and, from a different viewpoint, the heat exchanger 10 is divided into a plurality of heat exchanging units 12, so that the manufacturing equipment of the heat exchanger 10 There is an advantage that can be reduced in size.

Note that the heat exchanger of the present invention is not limited to the structure shown in the above figure, and can be variously modified as follows without departing from the gist of the present invention.

(Modification 1)
FIG. 10 is a diagram illustrating a modification of the position of the hanging portion.
The position of the suspending portion 20 may be on the upper side of the fin 13 and is provided above the uppermost heat transfer tube 14a in the upper heat exchanging portion 12A in FIG. 8, but the upper heat exchanging portion 12C in FIG. As described above, it may be provided between the uppermost heat transfer tube 14c and the lower heat transfer tube 14c. Further, as shown in FIG. 10, it may be between the second-stage heat transfer tube 14 and the third-stage heat transfer tube 14 from the top.

(Modification 2)
FIG. 11 is a diagram illustrating a modification of the holding hole of the support portion.
The shape of the holding hole 22 of the hanging part 20 is circular in FIG. 8, but may be rectangular as shown in FIG.

(Modification 3)
The number of upper and lower layers of the heat exchange unit 12 is not limited to two as shown in FIG. 2, and may be three or more. However, from the viewpoint of minimizing the deformation of the fins 13, it is preferably within 3 steps.

(Modification 4)
In the first embodiment, the configuration in which the hanging portions 20 are provided on the fins 13 of the back surface portion 10a and the bent portion 10b of the heat exchanger has been described. It is good also as a structure which provided. In short, the suspending portion 20 may be formed on the fin 13 so that the upper heat exchanging portions 12A and 12C can be suspended from the housing 2.

(Modification 5)
The number of columns of the heat exchange unit 12 is not limited to two as shown in FIG. 2, but may be one or three or more. In addition, when it is set as 3 or more rows, you may abbreviate | omit the hanging part of the heat exchange part 12 pinched | interposed. Even if buckling occurs when omitted, there is no problem in design because it cannot be seen from the outside.

Embodiment 2. FIG.
In the second embodiment, the structure of the hanging portion 20 is further clarified than in the first embodiment, and the structure not particularly described below is the same as that in the first embodiment.

FIG. 12 is an enlarged view of fins in the upper heat exchange section of the heat exchanger according to Embodiment 2 of the present invention.
In the second embodiment, the diameter φ of the holding hole 22 is substantially the same as the outer diameter of the suspension support member 30, and the height t of the insertion hole 21 is such that the suspension support member 30 can be easily inserted. It was formed larger than the diameter of the suspension support member 30. Therefore, the height t of the insertion hole 21 is formed larger than the diameter φ of the holding hole 22.

Since the second embodiment is configured in this way, the same effects as those of the first embodiment can be obtained, and the following effects can be obtained. That is, by making the holding hole 22 substantially the same size as the diameter of the suspension support member 30, the retention hole 22 and the suspension support member 30 in the suspension part 20 of each of the upper heat exchange parts 12 </ b> A and 12 </ b> C. While the contact is a point contact in the first embodiment, the contact is a line contact in the second embodiment. Therefore, the second embodiment has an effect that the supporting load can be easily dispersed as compared with the first embodiment. In addition, the expression “substantially the same” includes not only the completely same case but also a case where a hole is formed so as to obtain a line contact with the hanging support member 30.

Embodiment 3 FIG.
The third embodiment relates to another configuration example of the hanging part 20. Hereinafter, the structure not particularly described is the same as that of the first embodiment.

FIG. 13 is an explanatory diagram of the heat exchanger according to Embodiment 3 of the present invention, and shows a perspective view of the heat exchange part and fin shapes of the bent part and the back part of the heat exchange part.
The third embodiment is applied to a one-row heat exchanger, and the perspective view of FIG. 13 shows an upper heat exchange unit 12A and a lower heat exchange unit 12B. In the third embodiment, the structure of the suspending portion 20 is different from the structure of the first embodiment, and the suspending portion 20a of the fin 13a of the back surface portion 10a is constituted by a circular through hole. Further, the fin 13a of the bent portion 10b is connected to the fin 13a from the end on the back side (windward side) of the fin 13 so as not to interfere with the insertion of the suspension support member 30 into the suspension portion 20a of the back portion 10a. An insertion hole that opens toward the opposite end is configured as a hanging portion 20b. Moreover, the upper end of the hanging part (insertion hole) 20b is formed at the same height as the upper end of the hanging part (through hole) 20a of the back surface part 10a. With the above configuration, a columnar space is formed that extends in a direction orthogonal to the air flow direction (the white arrow direction in FIG. 13) and holds the suspension support member 30.

When inserting the suspension support member 30 into the suspension unit 20 (20a, 20b) configured as described above, the following is performed. That is, as shown in the perspective view of FIG. 13, the other end of the rod-like support portion 31 of the suspension support member 30 provided with the fixing portion 32a at one end is constituted by the suspension portion 20 (20a, 20b). Inserted into the cylindrical space from the side and fixed to the fixing portion 32b. And the fixing | fixed part 32a, 32b is fixed with the volt | bolt 41 to the support metal plate 40 fixed to the inner side of the housing | casing 2 similarly to FIG.

Since the third embodiment is configured as described above, the same effects as those of the first embodiment can be obtained, and the following effects can be obtained. That is, in the third embodiment, the hanging portion 20a provided on the fin 13a of the back surface portion 10a is a through hole that opens only at a location where the hanging support member 30 passes. The strength of the fin itself can be increased compared with the case where the notch is opened. In addition, since the suspension part 20a is a through hole, the suspension support member 30 does not have to be separated from the suspension part 20 due to transportation vibration or the like as compared with the first embodiment.

Although the embodiments 1 to 3 have been described as different embodiments, the heat exchanger may be configured by appropriately combining the characteristic configurations and processes of the embodiments. Further, in each of the first to third embodiments, the modification applied to the same component is similarly applied to other embodiments other than the embodiment described for the modification.

1 outdoor unit, 2 housing, 2a left side panel, 2b right side panel, 2c back panel, 2d top panel, 2e front panel_up, 2f front panel_down, 3 air inlet, 4 fan guard, 5 air blow Outlet, 6 front panel, 10 heat exchanger, 10a back part (intermediate part), 10b bent part, 10c side part, 12 (12A-12D) heat exchange part, 13 (13a-13d) fin, 14 (14a-14d) ) Heat transfer tube, 15 U bend, 16 header, 20 (20a, 20b) hanging part, 21 insertion hole, 22 holding hole, 30 (30a, 30b) hanging support member, 31 support part, 32 (32a, 32b) Fixed part, 40 support sheet metal, 41 bolt, 101 upper heat exchange part, 102 lower heat exchange part, 103 upper heat exchange part 101 Lower, 104 bottom.

Claims (12)

A heat exchanging section including a plurality of fins arranged in parallel and a plurality of heat transfer tubes arranged so as to be orthogonal to the fins is configured by overlapping a plurality of stages in the vertical direction, and is U-shaped or deformed when viewed in plan. A heat exchanger formed in a U-shape,
The fin in the middle part of the uppermost heat exchanging part includes a hanging part constituted by an opening that can be hung on a hanging support member separate from the heat exchanger. Exchanger. 2. The heat exchanger according to claim 1, wherein the suspension part is formed on an upper side of the fin of the uppermost heat exchange part. The hanging part is a notch that is open at one end, and the notch opens from the windward or leeward side edge of the fin toward the opposite side edge, and the suspension support member is 2. An insertion hole to be inserted, and a holding hole that opens continuously upward from the insertion hole and holds the suspension support member inserted from the insertion hole. Or the heat exchanger of Claim 2. The heat exchanger according to claim 3, wherein the holding hole has a dimension that is substantially the same as an outer diameter of the suspension support member. A plurality of rows of the heat exchanging portions stacked in the vertical direction are provided in the air flow direction,
The suspension part provided on the fin in each of the heat exchange part on the furthest wind side and the heat exchange part on the furthest wind side is constituted by a notch opened outward. The heat exchanger according to any one of claims 1 to 3. The heat exchanging portion has at least an intermediate portion and side portions extending opposite to each other from bent portions on both sides of the intermediate portion, and the suspension portion of the fin of the intermediate portion is configured by a hole, and the bent portion The suspension part of the fin of the part is composed of a notch opened outward, and the suspension support member is formed in a space formed by the hole and the notch being continuous in the direction in which the fins are juxtaposed. The heat exchanger according to claim 1 or 2, wherein the heat exchanger can be installed. The heat exchanger according to claim 6, wherein the hole has a dimension substantially the same as an outer diameter dimension of the suspension support member. The heat exchanger according to claim 6 or 7, wherein the upper ends of the holes and the notches are at the same height. The heat exchanger according to any one of claims 1 to 8, wherein the number of stacked layers of the heat exchange section is 2 or 3. The heat exchanger according to any one of claims 1 to 9, wherein the heat transfer tube is a flat tube made of aluminum and an aluminum alloy. In the heat exchange unit, a plurality of the heat transfer tubes are arranged in the step direction,
11. The suspension part according to claim 1, wherein the suspension part is disposed above the heat transfer tube at the third stage from the top in the fin of the heat exchange part at the uppermost stage. The heat exchanger as described in. A heat exchanger according to any one of claims 1 to 11, and a housing that houses the heat exchanger,
The outdoor unit, wherein the heat exchanger is suspended by the suspension part on the suspension support member that is detachably connected to the housing.

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