JP2015224844A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, when flat plate-like heat exchangers are connected, a connection member is necessary; however, as heat exchange is not performed in the connection member portion and it becomes a dead space, performance as the heat exchanger cannot be sufficiently exerted in a limited space.SOLUTION: A heat exchanger includes: a plurality of flat tubes 4; and corrugated fins provided between the plurality of flat tubes 4. The flat tube 4 has: a first straight part 4S1-a third one 4S3 in which a flat part becomes linear; and a first bent part 4C1, a second bent part 4C2 bent in the horizontal direction of the flat part. The corrugated fin 6 provided at the straight part has inclination downward from the horizontal toward a windward side.

Description

  The present invention relates to a parallel flow heat exchanger having corrugated fins.

  Conventionally, a plurality of heat exchangers incorporated in an air conditioner are usually connected so as to surround a cross flow fan, particularly in an indoor unit of a separate type air conditioner. Even in a heat exchanger unit using parallel flow heat exchangers with corrugated fins, when arranging heat exchangers in a limited space, a plurality of flat heat exchangers are connected so as to surround the cross flow fan. And stored in the casing (see, for example, Patent Document 1).

JP 2011-47600 A

  However, the conventional arrangement method requires a connecting member for connecting the flat heat exchangers to each other. Since heat is not exchanged at the connecting member portion, it becomes a dead space, and the performance as a heat exchanger unit cannot be sufficiently exhibited in a limited space.

  An object of the present invention is to improve the performance of a heat exchanger unit by effectively using a limited space by suppressing a dead space due to a connecting member including a header in a parallel flow heat exchanger having corrugated fins. In addition, the water condensed on the heat exchanger is prevented from falling or scattering from the heat exchanger.

  In order to solve the above-described conventional problems, a heat exchanger according to the present invention includes a plurality of flat tubes and corrugated fins provided between the plurality of flat tubes, and the flat portions of the flat tubes have straight lines. The corrugated fins arranged on the straight portion are inclined so as to be lowered from the horizontal toward the windward side. It is a thing.

  The heat exchanger according to the present invention includes a plurality of flat tubes and corrugated fins provided between the plurality of flat tubes, and the flat tubes include a straight portion having a flat portion and a flat portion. The corrugated fins arranged in the straight line portion are lowered from the horizontal toward the upwind side in the region from the leeward side of the flat tube to a predetermined distance. In the region on the windward side from the predetermined distance, the region is provided to be inclined so as to rise from the horizontal toward the windward side.

  ADVANTAGE OF THE INVENTION According to this invention, in the parallel flow heat exchanger which has a corrugated fin, a dead space can be suppressed, the effective area of a heat exchanger can be increased in the limited space, and dew condensation water is used as a heat exchanger. It can prevent falling or scattering more.

Sectional drawing of the indoor unit provided with the heat exchanger of Embodiment 1 of this invention Schematic explaining the arrangement of corrugated fins in part A of FIG. The block diagram in the state before the bending process of the heat exchanger of Embodiment 1 of this invention Sectional drawing in the state before the bending process of the heat exchanger of Embodiment 1 of this invention Explanatory drawing which shows the procedure of the bending process of the heat exchanger of Embodiment 1 of this invention Refrigeration cycle diagram of a heat pump air conditioner including the heat exchanger according to Embodiment 1 of the present invention Sectional drawing of the indoor unit provided with the heat exchanger of Embodiment 2 of this invention Schematic explaining the arrangement of corrugated fins in part D of FIG.

  A first invention includes a plurality of flat tubes and corrugated fins provided between the plurality of flat tubes, and the flat tubes include a straight portion in which a flat portion is linear, and a horizontal direction of the flat portion. The corrugated fins disposed on the straight line portion are heat exchangers that are inclined so as to be lowered from the horizontal direction toward the windward side.

  As a result, when the heat exchanger is used as an evaporator, the condensed water generated in the fins and flat tubes reaches the water receiver along the louvers, corrugated fins and flat tubes by gravity without staying in place. Therefore, it is possible to prevent the condensed water from falling from the heat exchanger or from being scattered.

  A second invention includes a plurality of flat tubes and corrugated fins provided between the plurality of flat tubes, and the flat tubes include a straight portion in which a flat portion is linear, and a horizontal direction of the flat portion. The corrugated fins arranged on the straight line portion are inclined so as to descend from the horizontal toward the leeward side in the region from the leeward side to the predetermined distance of the flat tube. It is a heat exchanger that is provided and is inclined so as to rise from the horizontal as it goes to the windward side in the region on the windward side from the predetermined distance.

  Thereby, even when the heat exchanger is used as an evaporator and the amount of condensed water is small, the condensed water flowing from the leeward side of the corrugated fin and the condensed water flowing from the leeward side of the corrugated fin merge. For this reason, the condensed water does not stay on the spot and reaches the water receiver along the louver, corrugated fin and flat tube by gravity, so that the condensed water can be prevented from falling or scattering from the heat exchanger. .

  A third invention is the heat exchanger according to the first or second invention, wherein the leeward side end portion of the corrugated fin is located on the leeward side of the leeward side end portion of the flat tube.

  As a result, when the heat exchanger is used as an evaporator, the condensed water is guided to the windward side by the corrugated fins even in a state where the condensed water from the flat tube falls. It can be prevented from dropping or scattering from the exchanger.

  Below, the heat exchanger unit of this invention is demonstrated. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
As an application example of the heat exchanger according to the first embodiment of the present invention, an indoor unit of an air conditioner used in a general home will be described. FIG. 1 is a cross-sectional view of an indoor unit including a heat exchanger according to Embodiment 1 of the present invention.

  The indoor unit 10 includes a casing 26 that forms an outer shell, and includes the heat exchanger 1 therein. Further, the casing 26 is provided with a front opening 10 a located on the front side of the heat exchanger 1 and an upper surface opening 10 b located on the upper surface side of the heat exchanger 1.

  The front opening 10a is provided with a movable front panel (hereinafter simply referred to as a front panel) 11 that can be freely opened and closed. The front panel 11 closes the front opening 10a when the air conditioner is stopped, but moves in a direction away from the casing 26 to open the front opening 10a when the air conditioner is operating (front opening 10a). (The state in which 10a is closed is not shown).

  The indoor unit 10 also blows out the heat exchanged air indoors with a fan 12 for exchanging the indoor air taken in from the front opening 10a and the upper surface opening 10b in the heat exchanger 1 and blowing the air indoors. The blower outlet 13 is provided. The air outlet 13 is provided with an up / down air direction changing blade 14 that opens and closes an opening and changes the air blowing direction up and down, and a left and right air direction changing blade 15 that changes the air blowing direction left and right.

  The upper and lower airflow direction changing blades 14 are a lower blade 19 that opens and closes the air outlet 13, and an upper blade that is provided above the lower blade 19 and controls the blowing direction of air blown from the air outlet 13 in cooperation with the lower blade 19. 20. The lower blade 19 is connected to a drive shaft (not shown), while the upper blade 20 is connected to a drive shaft (not shown), and each drive shaft (not shown) is a drive source such as a drive motor ( (Not shown).

  When the air conditioner starts operation, the up-and-down air direction changing blade 14 is controlled to open, the air outlet 13 is opened, and the fan 12 is driven, so that the indoor air passes through the front opening 10a and the upper opening 10b. It is taken into the interior of the indoor unit 10. The taken indoor air exchanges heat with the heat exchanger 1, passes through the fan 12, passes through the ventilation path 21 formed on the downstream side of the fan 12, and is blown out from the blower outlet 13.

  Moreover, the blowing direction of the air from the blower outlet 13 is controlled by the up / down air direction changing blade 14 and the left / right air direction changing blade 15, and the up / down direction angle of the up / down air direction changing blade 14 and the left / right direction angle of the left / right air direction changing blade 15 are It is controlled by a remote control (remote operation device) that controls the indoor unit 10.

  Further, the ventilation path 21 located on the upstream side of the air outlet 13 includes a rear guider 22 located on the downstream side of the fan 12, a stabilizer 23 located on the downstream side of the fan 12 and facing the rear guider 22, and left and right side walls 24. It is formed with.

  The term “stabilizer” described above is located near the downstream of the fan 12, stabilizes the vortex generated near the front of the fan 12, and is located downstream of the stabilizer and conveyed by the fan 12. Although it can also be divided into the front wall portion of the diffuser responsible for air pressure recovery, these are collectively referred to as “stabilizer” in the present specification.

  With this configuration, the blowout air is sandwiched between the up / down wind direction changing blades 14 (the lower blade 19 and the upper blade 20) and the left and right side walls 24 inside the air outlet 13 and is changed without leaking up, down, left, and right. On the other hand, on the outside of the air outlet 13, on the outside of the air outlet 13, even if the blowing air changed to the left and right is blown further left and right than the left and right ends of the air outlet 13, The up / down and left / right changing directions can be maintained without being diffused by the up / down air direction changing blades 14 extended outward from the side wall 24.

  Furthermore, in the indoor unit 10, dust contained in room air taken in from the front opening 10 a and the upper opening 10 b is removed between the front opening 10 a and the upper opening 10 b and the heat exchanger 1. The filter 16 is provided. This filter 16 is attached to a filter frame 17 a provided in the casing 26.

  The casing 26 is provided with water trays 18a and 18b for receiving and draining the dew condensation water from the heat exchanger 1. The water tray 18 a is provided on the front side from the stabilizer 23, and the water tray 18 b is provided on the back side from the upper end of the rear guider 22.

  Furthermore, a display unit 41 that displays the operating state of the air conditioner and the like is provided on the lower front side of the filter 16 and above the outlet 13.

  Here, the heat exchanger 1 will be described in detail.

  The heat exchanger 1 includes a plurality of flat tubes 4, header pipes 2 and 3 provided at both ends in the longitudinal direction of the flat tubes 4, and corrugated fins 6 provided between the plurality of flat tubes 4. Parallel flow heat exchanger.

  The flat tube 4 is an elongated flat plate-like heat transfer tube having a refrigerant passage 5 therein, and its outer surface has two flat portions 4a facing each other and two side portions connecting the two flat portions 4a. 4b (see FIG. 4).

  In the heat exchanger 1, the flat portion 4a of the flat tube 4 is bent in the horizontal direction by a bending process described later. That is, the flat tube 4 includes a straight portion 4S in which the flat portion 4a is linear, and a bent portion 4C bent in the horizontal direction of the flat portion 4a. In the present embodiment, as shown in FIG. 1, the flat tube 4 includes three straight portions, ie, a first straight portion 4S1, a second straight portion 4S2, a third straight portion 4S3, and two bent portions. The first bent portion 4C1 and the second bent portion 4C2 are formed in a substantially U shape.

  In the heat exchanger 1, the flat portion 4a of the flat tube 4 is parallel to the depth direction of the indoor unit 10 so that the longitudinal direction of the header pipes 2 and 3 is parallel to the width direction of the indoor unit 10. It is provided in the indoor unit 10. In the heat exchanger 1, the header pipes 2 and 3 are arranged above the water trays 18 a and 18 b, respectively, and the flat tube 4 formed in a substantially U shape surrounds the fan 12. The

  The first linear portion 4S1 is disposed substantially in front of the rotation axis of the fan 12 and substantially below the rotation axis of the fan 12. The second linear portion 4S2 is disposed substantially in front of the rotation axis of the fan 12 and substantially above the rotation axis of the fan 12. The third linear portion 4S3 is disposed substantially rearward from the rotation axis of the fan 12 and substantially above the rotation axis of the fan 12. For this reason, each linear part 4S is arrange | positioned so that it may become substantially parallel with the circumferential direction of the fan 12. FIG. In other words, the straight portions 4S are arranged so that the longitudinal direction of the flat portion 4a is substantially orthogonal to the air flow direction generated by the fan 12.

  The first bent portion 4C1 is located between the first straight portion 4S1 and the second straight portion 4S2. The second bent portion 4C2 is located between the second straight portion 4S2 and the third straight portion 4S3. For this reason, the first bent portion 4C1 is disposed substantially in front of the rotation axis of the fan 12, and the second bent portion 4C2 is disposed substantially above the rotation axis of the fan 12. In the normal installation state of the indoor unit 10, the second bent portion 4 </ b> C <b> 2 constitutes the uppermost surface of the heat exchanger 1.

  Next, the corrugated fin 6 will be described with reference to FIGS. FIG. 2 is a schematic diagram for explaining the arrangement of the corrugated fins 6 in the portion A of FIG. 1, and FIG. 3 is a configuration diagram of the heat exchanger 1 before bending.

The corrugated fin 6 is provided with a plurality of flat surfaces 6a formed by weaving thin and long aluminum plates. And in the normal installation state of the heat exchanger 1 or the indoor unit 10, as shown in FIG. 2, as for the corrugated fin 6 of the linear part 4S, the flat surface 6a goes to a windward side with respect to the horizontal line H. It is comprised so that it may incline in the downward direction according to.

  By comprising in this way, the dew condensation water which arises in the heat exchanger 1 at the time of air_conditionaing | cooling operation is dropped from the surface of the heat exchanger 1, and is not scattered with air in a room | chamber interior.

  The corrugated fin 6 is provided with a louver 25. The louver 25 is formed by cutting and raising a part of the flat surface 6 a into a slit shape, and the cut and raised surface is configured to be substantially parallel to the side portion 4 b of the flat tube 4. By comprising in this way, the dew condensation water which arises in the heat exchanger 1 at the time of air_conditionaing | cooling operation can be guide | induced downward through the louver 25, Therefore It is not scattered with air in a room | chamber interior.

  Further, the tip of the leeward side end portion of the corrugated fin 6 is configured to be leeward than the leeward side end portion of the flat tube 4. That is, on the leeward side of the flat tube 4, the corrugated fins 6 are configured to protrude from the flat tube 4.

  By configuring in this way, for example, since the inclination of the flat tube 4 is gentle, even in a state where the dew condensation water from the flat tube 4 falls, the dew condensation water is caused by the leeward side end portion of the corrugated fin 6. Since it is guided to the windward side of the corrugated fin 6, the condensed water generated in the heat exchanger 1 during the cooling operation is not dropped from the surface of the heat exchanger 1 and is not scattered along with the air in the room.

  Next, the configuration of the heat exchanger 1 will be described with reference to FIGS. 4 is a cross-sectional view of the heat exchanger in FIG.

  In the heat exchanger 1, two header pipes 2 and 3 are arranged in parallel at intervals, and a plurality of flat tubes 4 are arranged at a predetermined pitch between the header pipes 2 and 3. The flat tube 4 is an elongated molded product obtained by extruding a metal, and a plurality of rectangular refrigerant passages 5 are formed in each of the flat tubes through which the refrigerant flows.

  Each refrigerant passage 5 communicates with the inside of the header pipes 2 and 3, and corrugated fins 6 are disposed between the adjacent flat tubes 4. Side plates 7 are arranged outside the corrugated fins 6 located on the outermost side.

  The header pipes 2 and 3, the flat tube 4, and the side plate 7 are all made of a metal having good heat conductivity such as aluminum. The flat tube 4 is fixed to the header pipes 2 and 3, the corrugated fin 6 is fixed to the flat tube 4, and the side plate 7 is fixed to the outermost corrugated fin by brazing or welding.

  In the heat exchanger before bending, the corrugated fins 6 have different inclinations in a region closer to the header pipe 2 than the position B where the second bent portion 4C2 is formed after the bending and a region closer to the header pipe 3 than the position B. Is provided. In addition, the first corrugated fin 61 provided in the region on the header pipe 2 side from the position B that becomes the second bent portion 4C2 after the bending process, and the second corrugated fin provided in the region on the header pipe 3 side from the position B. The corrugated fins 62 are not continuous and are provided with a predetermined gap.

With this configuration, after bending, each of the first corrugated fins 61 and the second corrugated fins 62 is directed toward the windward side with respect to the horizontal line H in the normal installation state of the indoor unit 10. Can be configured to incline in a downward direction. After the bending process, the first corrugated fin 61 becomes a corrugated fin located at the first straight portion 4S1, the first bent portion 4C1, and the second straight portion 4S2, and the second corrugated fin 62 is The corrugated fins are located in the third linear portion 4S3.

  Next, the procedure for providing a bending part in the heat exchanger 1 comprised as mentioned above is demonstrated.

  FIG. 5 is an explanatory diagram for explaining a procedure for bending the heat exchanger 1. In the state of bending, the heat exchanger 1 has a flat plate shape as shown in FIG. In order to provide the heat exchanger 1 with a bent portion, as shown in FIG. 5 (b), the bending die 8 is applied to the side portion 4b of the flat tube 4 so that the longitudinal direction of the flat tube 4 is substantially perpendicular. Touch.

  Next, as shown in FIG. 5 (c), the header pipe 2 is fixedly held by a fixing jig (not shown), and the other header pipe 3 is clamped by a bending drive unit (not shown) of a bending device. Press toward the bending mold 8. As a result, the heat exchanger 1 can be bent at a predetermined angle.

  By performing such a bending process a plurality of times, two or more bent portions can be provided for one heat exchanger 1.

  In the bending process as described above, the flat tube 4 and the corrugated fin 6 are bent integrally with the flat tube 4 in the horizontal direction of the flat portion 4a, and the flat tube 4 and the corrugated fin 6 are substantially equivalent. It will be bent at the bending angle.

  The operation when the indoor unit 10 equipped with the heat exchanger 1 configured as described above is mounted on a heat pump air conditioner for air conditioning operation will be described.

  FIG. 6 is a refrigeration cycle diagram of a heat pump air conditioner including the heat exchanger 1 of the first embodiment.

  The configuration of the heat pump air conditioner will be described. A compressor 31 that compresses refrigerant, a four-way valve 32 that switches a refrigerant circuit during cooling and heating operation, an outdoor heat exchanger 33 that exchanges heat of the outside air with the refrigerant that becomes a condenser during cooling and an evaporator during heating, and an outdoor heat exchanger 33, an outdoor fan 38 for promoting heat exchange between the refrigerant flowing in the refrigerant and the outside air, a throttling device 34 for depressurizing the refrigerant, a heat exchanger 1 for exchanging the heat of the refrigerant and the indoor air, an evaporator during cooling and a condenser during heating, A fan 12 that promotes heat exchange between the refrigerant flowing in the heat exchanger 1 and room air and an accumulator 36 provided on the suction side of the compressor 31 are provided.

  The outdoor unit 42 includes a compressor 31, a four-way valve 32, an outdoor heat exchanger 33, an expansion device 34, an accumulator 36, and an outdoor fan 38, and is connected to the indoor unit 10 by a liquid side connection pipe 43 and a gas side connection pipe 44. Has been.

  The operation of the heat pump air conditioner configured as described above will be described.

  First, during the cooling operation, the refrigerant compressed by the compressor 31 becomes a high-temperature and high-pressure refrigerant and is sent to the outdoor heat exchanger 33 through the four-way valve 32. Then, the outdoor fan 38 promotes heat exchange with the outside air to dissipate heat and becomes a high-pressure liquid refrigerant that is sent to the expansion device 34. In the expansion device 34, the pressure is reduced to form a low-temperature and low-pressure two-phase refrigerant, which is sent to the heat exchanger 1 through the liquid side connection pipe 43.

The indoor air sucked by the fan 12 exchanges heat with the refrigerant through the heat exchanger 1, and the refrigerant absorbs the heat of the indoor air and evaporates to become a low-temperature gas refrigerant. At this time, the indoor air absorbed by the refrigerant is lowered in temperature and humidity and blown out into the room by the fan 12 to cool the room. At this time, depending on the operating conditions, condensed water is generated in the flat tubes 4 and the corrugated fins 6 of the heat exchanger 1.

  However, in the present embodiment, since the corrugated fins 6 disposed between the flat tubes 4 are configured so that the inclination of the corrugated fins 6 is inclined from the horizontal direction toward the windward side, the condensed water does not stay on the spot. The water receivers 18a and 18b are reached along the louver 25, the corrugated fins 6 and the flat tubes 4 due to gravity. The condensed water that has reached the water receivers 18a and 18b is led out of the indoor unit 10 and drained outside the room (not shown).

  The gas refrigerant passes through the gas side connection pipe 44 and enters the four-way valve 32, and returns to the compressor 31 through the accumulator 36.

  On the other hand, during the heating operation, the refrigerant compressed by the compressor 31 becomes a high-temperature and high-pressure refrigerant, passes through the four-way valve 32, and is sent to the gas side connection pipe 44. The indoor air sucked by the fan 12 exchanges heat with the refrigerant through the heat exchanger 1, and the refrigerant dissipates heat to the indoor air and condenses to become a high-pressure liquid refrigerant. At this time, the indoor air absorbs the heat of the refrigerant and is blown into the room by the fan 12 in a state where the temperature is raised, thereby heating the room. Thereafter, the refrigerant is sent to the expansion device 34 through the liquid side connection pipe 43, and is reduced in pressure by the expansion device 34 to become a low-temperature and low-pressure two-phase refrigerant, is sent to the outdoor heat exchanger 33, and the outdoor fan 38 Heat exchange is promoted to evaporate, and the vapor is returned to the compressor 31 through the accumulator 36 through the four-way valve 32.

  In this way, the air conditioning operation is performed.

  In the present embodiment, since the condensed water can be discharged by the corrugated fins 6 even when the inclination of the flat tube 4 is gentle, the casing 26 is in a state where the degree of freedom of the form of the heat exchanger 1 is improved. The dead space can be suppressed and the effective area of the heat exchanger can be increased within the limited space.

  In the case where the corrugated fin 6 is partially horizontal in a part of the first bent portion 4C1 of the heat exchanger 1, the horizontal portion is prevented so that condensed water is not generated by heat exchange in the horizontal portion. If the tape is attached so that the air does not pass through, the fall of the dew condensation water from the heat exchanger 1 can be prevented more reliably.

(Embodiment 2)
A heat exchanger according to a second embodiment of the present invention will be described.

  Note that the same configurations and operations as those described in the first embodiment are denoted by the same reference numerals as those in the first embodiment, description thereof is omitted, and only different points will be described.

  FIG. 7 is a cross-sectional view of the indoor unit including the heat exchanger according to the second embodiment of the present invention, and FIG. 8 is a schematic diagram for explaining the arrangement of the corrugated fins 6 in the D part of FIG.

In the heat exchanger 1 according to the second embodiment, the corrugated fin 6 provided in the straight portion 4S includes a bent portion 60 at a substantially central portion in the air flow direction. That is, the corrugated fin 6 is inclined so that the flat surface 6a is inclined with respect to the horizontal line H as it goes to the windward side in the region from the windward side part 4b of the flat tube 4 to a predetermined distance. The direction in which the flat surface 6a rises toward the windward side with respect to the horizontal line H in the region on the windward side from a predetermined distance from the windward side portion 4b of the flat tube 4 via the bent portion 60. It is comprised so that it may incline to. Note that the leeward inclination from the bent portion 60 and the leeward inclination from the bent portion 60 are:
It is desirable to be symmetric about a straight line parallel to the longitudinal direction of the flat tube 4 passing through the bent portion 60.

  With such a configuration, even when there is little condensed water generated in the heat exchanger 1 during the cooling operation, the condensed water flowing from the leeward side of the corrugated fin and the condensed water flowing from the leeward side of the corrugated fin merge. Therefore, it is possible to reach the water receiver along the louver, the corrugated fin and the flat tube by gravity without staying in place. For this reason, the condensed water is not scattered with the air in the room, and it is possible to prevent the power of the fan 12 from increasing due to an increase in ventilation resistance due to the stagnation of the condensed water.

  According to the present invention, in a parallel flow heat exchanger having corrugated fins, dead space can be suppressed and the effective area of the heat exchanger can be increased within the limited space, so that the limited space is effectively used. By using it, a heat exchanger unit with higher performance can be provided. For this reason, the heat exchanger of the present invention can be applied not only to home air conditioners but also to commercial air conditioners and the like.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 3 Header pipe 4 Flat tube 4a Flat part 4b Side part 4C Bending part 4C1 1st bending part 4C2 2nd bending part 4S Linear part 4S1 1st linear part 4S2 2nd linear part 4S3 1st 3 linear section 5 refrigerant passage 6 corrugated fin 7 side plate 8 bend mold 10 indoor unit 10a front opening 10b top opening 11 front panel 12 fan 13 outlet 14 up / down air direction change blade 16 filter 17a filter frame 18a, 18b water tray 19 Lower blade 20 Upper blade 21 Ventilation path 22 Rear guider 23 Stabilizer 24 Side wall 25 Louver 26 Casing 31 Compressor 32 Four-way valve 33 Outdoor heat exchanger 34 Throttle device 36 Accumulator 38 Outdoor fan 41 Display unit 42 Outdoor unit 43 Liquid side connection pipe 44 Gas side connection pipe 61 1st col Tofin 62 second corrugated fins

Claims (3)

The flat tube includes a plurality of flat tubes and corrugated fins provided between the plurality of flat tubes, and the flat tube includes a straight portion in which the flat portion is linear, and a bent portion bent in the horizontal direction of the flat portion. And the corrugated fins arranged in the straight portion are provided so as to be inclined from the horizontal as it goes to the windward side. The flat tube includes a plurality of flat tubes and corrugated fins provided between the plurality of flat tubes, and the flat tube includes a straight portion in which the flat portion is linear, and a bent portion bent in the horizontal direction of the flat portion. The corrugated fins arranged in the straight line portion are provided so as to be inclined so as to descend from the horizontal toward the windward side in the region from the leeward side of the flat tube to the predetermined distance, A heat exchanger, wherein the heat exchanger is provided so as to incline so as to rise from the horizontal toward the windward side in the region on the windward side from the distance. 3. The heat exchanger according to claim 1, wherein an end portion on the leeward side of the corrugated fin is located on the leeward side from an end portion on the leeward side of the flat tube.