JP6230852B2 - Air conditioner and heat exchanger for air conditioner - Google Patents

Description

  The present invention relates to an air conditioner and a heat exchanger for an air conditioner.

  In order to improve the energy saving performance of the air conditioner, for example, it is conceivable to improve the performance of each part constituting the air conditioner. Specifically, in the heat exchanger that is a component of the air conditioner, it is preferable that the heat exchange efficiency is as high as possible. Moreover, since the wind (cold air or warm air) after heat exchange in the heat exchanger is blown into the room by the cross-flow fan, it is preferable that the ventilation resistance in the heat exchanger is as small as possible. By passing through a heat exchanger with low ventilation resistance, the power consumption of the cross-flow fan can be reduced.

  In order to achieve both high heat exchange efficiency and small ventilation resistance, for example, it is conceivable to make the air velocity distribution uniform when passing through the heat exchanger. Therefore, a technique described in Patent Document 1 is known in relation to such a technique.

  Patent Document 1 includes a housing having an air inlet and an air outlet, a blower fan provided in the housing, a fin and a heat transfer tube passing through the fin, and is arranged so as to surround the blower fan. A substantially inverted V-shaped indoor heat exchanger, the indoor heat exchanger having a front-side indoor heat exchanger and a back-side indoor heat exchanger, the front-side indoor heat exchanger having two linear portions And the air conditioner which has the curve part which both ends connected to two linear parts, and the arrangement space | interval of the heat exchanger tube in a curved part is smaller than the arrangement | positioning space | interval of the heat exchanger tube in a linear part is described.

JP 2011-64338 A

  In the heat exchanger described in Patent Document 1, a plurality of heat transfer tubes through which the refrigerant flows are arranged through the fins on the same row line. And each heat exchanger tube is arrange | positioned so that the heat exchanger tubes arrange | positioned on the adjacent row line may become zigzag form. By arranging in this way, the contact area between the air and the heat transfer tube is increased, the ventilation resistance is reduced, and energy saving is improved.

  In order to increase the heat exchange efficiency, it is conceivable to increase the amount of heat exchange by increasing the contact area between the heat transfer tubes and fins and the air constituting the heat exchanger. Thereby, higher heat exchange efficiency is obtained. Therefore, it is conceivable that the arc-shaped fin described in Patent Document 1 is bent, for example, like a dogleg shape, to widen the contact area. When air flows through a heat exchanger having such a fin shape, the contact area is larger than that of the heat exchanger having the arc-shaped fin, so that the area where the air contacts the fin is widened. Therefore, the heat exchange amount increases.

  However, in the case of such a fin, there is a portion where it is difficult to arrange the heat transfer tubes arranged on adjacent row lines in a staggered manner. Specifically, for example, in the case of a dogleg shape, it is difficult to arrange the heat transfer tubes in a staggered manner in the vicinity of the bent portion (corner) of the fin. If the heat transfer tubes cannot be arranged in a staggered manner, wind contraction or omission occurs in the vicinity of the portion, resulting in uneven ventilation resistance. For this reason, the wind speed distribution is also biased, resulting in a decrease in energy saving. Further, since the wind speed distribution is biased, the noise of the once-through fan increases.

  The present invention has been made in view of the above-mentioned problems, and the problem to be solved by the present invention is to provide an air conditioner and an air conditioner heat exchanger that exhibit better energy savings and quietness than conventional ones. It is to be.

As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by the following. That is, the gist of the present invention is surrounded by a housing having an air inlet and an air outlet, a heat exchanger that exchanges heat between the air sucked from the air inlet and the refrigerant, and the heat exchanger. A cross-flow fan that is disposed and exhausts air that has been heat-exchanged in the heat exchanger to the outside from the air outlet, the heat exchanger including a plurality of heat transfer tubes through which the refrigerant flows, and the heat transfer tubes And the plurality of heat transfer tubes are arranged so as to form a plurality of column lines penetrating the fins, and at least one transfer line is disposed between the adjacent column lines. A heat tube is disposed through the fin , the fin has a bent portion with a bent edge, and at least one heat transfer tube passes through the fin between the row lines adjacent to the bent portion. Japanese that are arranged To, relates to an air conditioner. The other means for solving will be described later in the mode for carrying out the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the air conditioner and the heat exchanger for air conditioners which show energy saving property and quietness better than before can be provided.

It is a figure which shows the air conditioner of this embodiment. It is a figure which shows the outline of a structure of the indoor heat exchanger with which the air conditioner of FIG. 1 is equipped. It is an end view of the indoor unit with which the air conditioner of this embodiment is equipped. It is an enlarged view of the front side heat exchanger with which the indoor unit of FIG. 3 is equipped. It is an enlarged view about the modification of the front side heat exchanger with which the indoor unit of FIG. 3 is equipped. It is a figure explaining the flow of the air in the modification of the front side heat exchanger of FIG. 5, (a) is a thing with the heat exchanger tube arrange | positioned in the downstream of the flow of air, (b) is the upstream of the flow of air. A heat transfer tube is arranged on the side.

  Hereinafter, a form (this embodiment) for carrying out the present invention will be described.

  FIG. 1 is a diagram illustrating an air conditioner 100 according to the present embodiment. The air conditioner 100 of the present embodiment includes an outdoor unit 1 and an indoor unit 3. The outdoor unit 1 and the indoor unit 3 are connected by a pipe 7 through which a refrigerant (working fluid) flows. The refrigerant is R410A, R32, or the like, but R32 is used in this embodiment. In addition, each device provided in the outdoor unit 1 and each device provided in the indoor unit 3 (all of which will be described later) are also connected by a pipe 7.

  The outdoor unit 1 includes an outdoor heat exchanger 2, a compressor 5 that compresses the refrigerant that flows through the pipe 7, an expansion valve 6 that expands the refrigerant that flows through the pipe 7, and the indoor heat exchanger 2. A propeller fin 9 that cools the refrigerant to be cooled by the outside air (radiates heat to the air) and a four-way valve 10 that can be switched according to the cooling operation or the heating operation. The indoor unit 3 includes an indoor heat exchanger 4 and a cross-flow fan 8 that generates air flow and supplies air heated or cooled in the indoor heat exchanger 4 to the room. .

The refrigerant flow during operation of the air conditioner 100 will be described.
First, the flow of the refrigerant during cooling will be described. During cooling, the refrigerant flows in the direction of the solid arrow in FIG. The refrigerant circulates in the pipe 7 to form a refrigeration cycle. First, when the gas refrigerant is compressed by the compressor 5, the refrigerant changes to a high-temperature and high-pressure gas refrigerant. The gaseous refrigerant is supplied to the outdoor heat exchanger 2 via the four-way valve 10. In the outdoor heat exchanger 2, the refrigerant is cooled (that is, released to the outside air) by contact with outside air generated by the rotation of the propeller fan 9, whereby the high-temperature and high-pressure gas refrigerant is changed to a low-temperature and high-pressure liquid refrigerant.

  The refrigerant changed to a liquid is expanded by the expansion valve 6 and becomes a low-temperature and low-pressure liquid refrigerant. Then, this liquid refrigerant is supplied to the indoor heat exchanger 4, and the cold heat of the refrigerant is supplied into the room by the cross-flow fan 8. That is, the taken-in indoor air is cooled, and the cooled air is supplied to the room as cold air. In the indoor heat exchanger 4, since the cold heat is released into the room (that is, the room heat is absorbed), it evaporates and changes to a gaseous refrigerant. Then, this gaseous refrigerant is supplied to the compressor 5 again.

  Next, the flow of the refrigerant during heating will be described. During heating, the refrigerant flows in the direction of the broken line arrow in FIG. When the gas refrigerant is compressed by the compressor 5, the refrigerant changes to a high-temperature and high-pressure gas refrigerant. The gaseous refrigerant is supplied to the indoor heat exchanger 4 via the four-way valve 10. In the indoor heat exchanger 4, the heat of the refrigerant is supplied into the room by the cross-flow fan 8. That is, the taken-in indoor air is heated, and the heated air is supplied to the room as warm air. The refrigerant is cooled and condensed (that is, released into the room) by the indoor air, whereby the high-pressure gaseous refrigerant is changed to a high-pressure liquid refrigerant.

  The refrigerant changed to a liquid is expanded by the expansion valve 6 to be in a two-phase state of a low-temperature and low-pressure gas and liquid. Then, the low-temperature and low-pressure refrigerant is supplied to the outdoor heat exchanger 2, and the cold heat of the refrigerant is released to the outside by contact with the outside air generated by the rotation of the propeller fan 9. That is, the gas and liquid two-phase refrigerant changes to a gas one-phase refrigerant by absorbing the heat of the outside air. Then, this gaseous refrigerant is supplied to the compressor 5 again.

  FIG. 2 is a diagram showing an outline of the configuration of the indoor heat exchanger 4 provided in the air conditioner 100 of FIG. The indoor heat exchanger 4 is configured such that a copper heat transfer tube 12 bent in a U shape penetrates a plurality of aluminum fins 11. The heat transfer tubes 12 inserted into the fins 11 are expanded hydraulically or mechanically so that the fins 11 and the heat transfer tubes 12 are in close contact with each other. Further, a joint component 13 is welded to the end of the heat transfer tube 12, thereby forming a refrigerant pipe 7. Therefore, it can be said that the heat transfer tube 12 constitutes a part of the pipe 7 described with reference to FIG.

  FIG. 3 is an end view of the indoor unit 3 provided in the air conditioner 100 of the present embodiment. In FIG. 3, illustration of some devices is omitted for simplification of illustration. The indoor unit 3 includes an indoor unit casing 18 and an indoor unit full surface panel 20. And the indoor heat exchanger 4 and the cross-flow fan 8 are provided in the space (inside the indoor unit 3) formed by these as mentioned above.

  The indoor heat exchanger 4 includes a front side indoor heat exchanger 16 disposed on the front side of the air conditioner 100 and a back side indoor heat exchanger 17 disposed on the back side of the air conditioner 100. Has been. As described with reference to FIG. 2, the front-side indoor heat exchanger 16 and the back-side indoor heat exchanger 17 are configured by the fins 11 and the heat transfer tubes 12. In the indoor unit 3, the front-side indoor heat exchanger 16 and the back-side indoor heat exchanger 17 are arranged in an inverted V shape (a shape that narrows upward) so as to surround the cross-flow fan 8.

  The indoor air is taken into the indoor unit 3 from the air suction port 14 above the indoor unit 3 by the flow of air generated by the rotation of the cross-flow fan 8. The taken-in air is heated or cooled in the indoor heat exchanger 4 and then supplied into the room from an air outlet 15 below the indoor unit 3. Thereby, indoor air conditioning can be performed. The wind direction of the supplied air is controlled by a wind direction control plate 19 provided in the vicinity of the air outlet 15.

  FIG. 4 is an enlarged view of the front-side indoor heat exchanger 16 provided in the indoor unit 3 of FIG. In FIG. 4, white arrows indicate the air flow. The fins 11 constituting the front-side indoor heat exchanger 16 have a bent shape, and in this embodiment, have a “<” shape. That is, the fin 11 is integrally provided with fins 11a and 11c whose edges are linearly connected to each other and the fins 11b (bent parts) whose edges are bent and connected to the fins 11a and 11c. Has been. In this embodiment, the degree of the bending is about θ = 150 ° as an angle θ formed between the straight line of the edge of the fin 11a and the straight line of the edge of the fin 11c.

  In the present embodiment, a portion including the fins 11b in the front side indoor heat exchanger 16 is referred to as a “bent heat exchanger”. Further, a portion including the fins 11a in the front side indoor heat exchanger 16 (that is, a heat exchanger formed on the upper side of the “bent heat exchanger”) is referred to as an “upper rectangular heat exchanger”. Further, a portion including the fins 11c in the front side indoor heat exchanger 16 (that is, a heat exchanger formed below the “bent heat exchanger”) is referred to as a “lower rectangular heat exchanger”.

  In the portion of the fin 11a and the fin 11c (that is, the upper rectangular heat exchanger and the lower rectangular heat exchanger), in this embodiment, three rows (rows indicated by broken lines in FIG. 4) are provided. Thus, the several heat exchanger tube 12 is arrange | positioned in the direction perpendicular | vertical with respect to the flow direction of air. Moreover, each heat exchanger tube 12 is arrange | positioned so that the heat exchanger tubes 12 arrange | positioned on the adjacent row line may become staggered with respect to the flow direction of air. By arrange | positioning like these, air can be made to contact the whole heat exchanger tube 12 uniformly, and favorable heat-transfer efficiency is achieved. Further, since the air uniformly contacts, the wind speed distribution of the air flowing in the front side indoor heat exchanger 16 is made uniform, and the noise of the once-through fan 8 (not shown in FIG. 4) is reduced and the energy saving is improved. It is like that.

  Also in the part of the fin 11b, the heat transfer tubes 12 are arranged in three rows (rows indicated by broken lines in FIG. 4) in the present embodiment, similarly to the fins 11a and 11c. However, it is difficult to arrange the heat transfer tubes 12 in a zigzag manner so that sufficient heat transfer efficiency can be provided at the fin 11b portion (that is, the bent portion of the fin 11). Therefore, in the present embodiment, one heat transfer tube 12A is provided between the central row gland and the rear row line, and one heat transfer tube is provided between the front row line and the central row gland. 12B is provided. That is, the heat transfer tube 12A is provided on the downstream side of the air flow, and the heat transfer tube 12B is provided on the upstream side of the air flow.

  Here, the reason why the heat transfer tubes 12 are arranged at positions deviated from the column lines, that is, between the column lines, like the heat transfer tubes 12A and 12B will be described.

  In order to increase the heat transfer efficiency, it is preferable to secure a wide heat transfer area (that is, the area of the fin 11) as described above. However, the indoor unit 3 of the air conditioner 100 is usually limited in length in the height direction. Therefore, when it is intended to secure a wide heat transfer area, it is difficult to increase the heat transfer area by elongating the fins 11 in the vertical direction. Therefore, for example, as a bent fin 11 as shown in FIG. 4, it is conceivable to form a fin 11 that protrudes to the front side to widen the heat transfer area.

  However, when the bent fins 11 are used, it is difficult to arrange the heat transfer tubes 12 arranged on adjacent row lines in a staggered manner at the bent portions of the fins 11. Therefore, in such a conventional part, the distance between the heat transfer tubes 12 arranged on the same row line is adjusted so that the arrangement is as close to a staggered pattern as possible. Thereby, air was made to contact the whole heat exchanger tube 12 as uniformly as possible.

  However, when a larger heat transfer area is desired to ensure higher heat transfer efficiency, the degree of bending becomes tight, that is, the angle θ shown in FIG. 4 becomes smaller. If the heat transfer tubes 12 are arranged in a staggered manner in the bent portion of the bent fin 11 (corresponding to the portion of the fin 11b in FIG. 4), the distance between the heat transfer tubes 12 may be extremely short. For this reason, new problems arise, such as increased ventilation resistance and uneven wind speed distribution. On the other hand, if the heat transfer tubes 12 are not arranged in a staggered manner so as not to cause these problems, air is likely to contract or escape, especially at the bent portion, and problems such as a decrease in heat transfer efficiency also occur. Therefore, in the prior art, it has been difficult to achieve both good energy saving and good silence.

  Therefore, in the present embodiment, the heat transfer tubes 12A and 12B are disposed at portions (bent portions) of the fins 11b other than on the row lines. By doing in this way, also in the heat exchanger tube 12 arrange | positioned at the fin 11b, air contacts the whole and the favorable heat-transfer efficiency is achieved. Therefore, the heat transfer area can be widened by using the bent fins 11 and the heat transfer efficiency can be improved. As a result, the energy saving performance of the air conditioner 100 can be improved.

  Furthermore, the escape and contraction of air can be prevented by the heat transfer tubes 12A and 12B arranged at the bent portions of the fin 11. Therefore, the wind speed distribution and the ventilation resistance of the air flowing through the front side indoor heat exchanger 16 can be made uniform. Further, by making the wind speed distribution and ventilation resistance uniform, the noise of the once-through fan 8 and the energy saving can be improved.

  As described above, according to the present embodiment, it is possible to make the wind speed distribution uniform even in a bent portion provided for the purpose of ensuring a wide heat transfer area. This makes it possible to further improve energy saving while taking advantage of conventional advantages such as quietness. In other words, according to the present embodiment, it is possible to achieve both good energy saving and good quietness regardless of the shape of the fin 11.

  In the present embodiment, as described above, R32 is used as the refrigerant through which the heat transfer tube 12 flows. This refrigerant is a refrigerant having a higher latent heat than a conventional refrigerant (for example, R401A). Therefore, by using R32 as the refrigerant, a heat exchange amount equivalent to the conventional one can be obtained even if the flow rate of the refrigerant is smaller than the conventional one. That is, the heat transfer tube 12 can be made thin by using R32 as the refrigerant. Specifically, it can be made thinner by 1 mm or more than the diameter of the heat transfer tube through which R401A flows.

  And if the heat exchanger tube 12 can be made thin, the freedom degree of design in arranging the heat exchanger tube 12 can be improved. Thereby, even if it is a site | part with strong bending like the fin 11b, it can prevent more reliably that the heat exchanger tubes 12 approach too much. As a result, it is possible to prevent the wind speed distribution from being excessively disturbed or the ventilation resistance from being excessively increased. Thereby, it is possible to more reliably prevent the wind speed distribution from becoming uneven and excessively increasing the ventilation resistance.

  FIG. 5 is an enlarged view of a modified example (front side heat exchanger 16A) of the front side indoor heat exchanger 16 provided in the indoor unit 3 of FIG. In the front-side indoor heat exchanger 16A shown in FIG. 5, the same members as those in the front-side indoor heat exchanger 16 shown in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The front side indoor heat exchanger 16A shown in FIG. 5 is different from the front side indoor heat exchanger 16 shown in FIG. 4 in that a heat transfer tube 12B (heat transfer tube 12 arranged on the upstream side of the air flow) is provided. It is not done. That is, in the front side indoor heat exchanger 16A of FIG. 5, the heat transfer tube 12A is provided on the downstream side of the air flow. In the part of the fin 11b, the fin width L in the air flow direction is longer than the fin width of the other part. Therefore, the resistance of the fin 11 tends to be large and the amount of air inflow tends to be small. Therefore, in the front-side indoor heat exchanger 16A, the number of the heat transfer tubes 12 arranged in parts other than the row line is set to one, the resistance difference in the fin 11b is reduced, and the nonuniformity of the wind speed distribution in the fin 11b is reduced. Can be improved more effectively.

  6A and 6B are diagrams for explaining the air flow in the modified example of the front side heat exchanger of FIG. 5, in which FIG. 6A is a diagram in which a heat transfer tube is arranged on the downstream side of the air flow, and FIG. A heat transfer tube is arranged on the upstream side of the flow. The thick arrows in FIG. 6 indicate the air flow direction.

  In the present embodiment, the position and number of the heat transfer tubes 12 arranged at positions deviating from the row line are not particularly limited, but when air flows from the side of the front side indoor heat exchanger 16, FIG. As shown to (a), it is preferable that the at least 1 heat exchanger tube 12A is arrange | positioned in the downstream of the flow of air. That is, at least one (may be two or more) heat transfer tubes 12 arranged between the row lines are arranged between the row lines closest to the cross-flow fan 8 (not shown in FIG. 6). Is preferred.

  As shown in FIG. 6A, the amount of air flowing into the fins 11b increases because there is no heat transfer tube 12 (the heat transfer tube 12B shown in FIG. 6B) on the upstream side. However, since the heat transfer tube 12A is disposed on the downstream side, the air that has flowed in from the upstream is unlikely to merge in the vicinity of the downstream heat transfer tube 12A. Therefore, the occurrence of contraction can be prevented more reliably. And generation | occurrence | production of a contraction flow can be prevented more reliably, and generation | occurrence | production of nonuniformity of speed distribution can be prevented more reliably. Thereby, in addition to energy saving improvement, silence can be improved more.

  However, as shown in FIG.6 (b), the heat exchanger tube 12B may be arrange | positioned in the upstream of the flow of air. By doing in this way, the ventilation resistance of an upstream side can be increased, the ventilation resistance to the fin 11b can be increased, and the inflow amount of the air to the part (including the vicinity) of the fin 11b can be reduced. Can do. Therefore, for example, when air flows in from above the front side indoor heat exchanger 16, that is, when air is taken in in an environment where the inflow speed of air is likely to be high, the fins can be arranged in this manner. The air inlet speed in 11b can be reduced. Thereby, it can prevent more reliably that the wind speed distribution in the fin 11b is disturbed.

  Although the present embodiment has been described above, the present embodiment is not limited to the above contents.

  For example, as the heat exchanger in which the heat transfer tubes 12 are arranged at positions deviating from the column lines, the front side indoor heat exchangers 16, 16A, and 16B are given as specific examples in the above-described embodiment, but deviated from the column lines. The heat exchanger which arrange | positions the heat exchanger tube 12 in a position is not restricted to this. Specifically, for example, instead of the front-side indoor heat exchanger having a “<” shape, an indoor heat exchanger having an inverted V shape (a shape that narrows upward) is disposed, and the indoor heat exchanger is arranged. The heat transfer tube 12 may be disposed at a position off the row line in the vicinity of the upper portion (bent portion corresponding to the fin 11b shown in FIG. 4). Even if it does in this way, the effect similar to the said effect will be acquired. Further, the present invention may be applied to the air conditioner 100 provided with only one heat exchanger, instead of combining separate heat exchangers as in the above embodiment.

  Further, the number of heat transfer tubes 12 arranged between the row lines is not limited to one, and may be two or more. For example, when two or more heat transfer tubes 12 are arranged between the row lines, two or more heat transfer tubes 12 may be arranged between the same row lines. In three cases, etc., one or more may be arranged, so that the total may be two or more. Therefore, “two or more heat transfer tubes are arranged between the row lines” is a concept including any of these forms.

  Furthermore, the specific position of the heat transfer tube 12 disposed between the row lines is not particularly limited. However, when one heat transfer tube 12 is arranged between the row lines, the four heat transfer tubes 12 (all are arranged on the row line) surrounding the one heat transfer tube are equally spaced (substantially). It is preferable that they are arranged at positions (including equal intervals). As a result, even better energy savings and quietness can be obtained.

  Further, the position of the heat transfer tube 12 arranged between the row lines is preferably a bent part (including the vicinity of the bent part) as shown in the figure, but other parts (for example, the fin 11a in FIG. You may arrange | position to the part of the fin 11c.

  Furthermore, the shape of the fins 11 constituting the front side indoor heat exchanger 16 is not limited to the illustrated example. In other words, any fin 11 may be used as long as it is a bent fin 11 having a bent portion, and is not limited to the dog-shaped fin 11 as shown. Further, the number of bent portions is not limited to one as shown in the figure, and fins having two or more bent portions may be used.

  Further, the number of column lines is not particularly limited, and may be any number as long as it is plural.

  Furthermore, in the said embodiment, although the indoor heat exchanger 4 of the indoor unit 3 of the air conditioner 100 was illustrated, you may apply this invention to the outdoor heat exchanger 2 of the outdoor unit 1. FIG.

3 Indoor unit 4 Indoor heat exchanger (heat exchanger)
7 Piping 8 Cross-flow fan 11 Fin 11a Fin 11b Fin (bent part)
11c Fin 12 Heat transfer tube 12A Heat transfer tube 12B Heat transfer tube 14 Air inlet 15 Air outlet 16 Front side indoor heat exchanger (heat exchanger, upper rectangular heat exchanger, bent heat exchanger, lower rectangular heat exchanger)
18 Case

Claims (9)

A housing having an air inlet and an air outlet, a heat exchanger for exchanging heat between the air sucked from the air inlet and the refrigerant, and surrounded by the heat exchanger, and arranged in the heat exchanger. A once-through fan that exhausts the heat-exchanged air to the outside from the air outlet,
The heat exchanger includes a plurality of heat transfer tubes through which the refrigerant flows, and fins that are thermally connected to the heat transfer tubes,
The plurality of heat transfer tubes are arranged to penetrate the fins to form a plurality of row lines,
Between the adjacent row lines, at least one heat transfer tube is disposed through the fin ,
The fin has a bent portion with a bent shape at the edge,
An air conditioner, wherein at least one heat transfer tube is disposed through the fin between the row lines adjacent to each other at the bent portion . The heat exchanger includes a front side heat exchanger disposed on the front side,
The front-side heat exchanger includes a bent heat exchanger having fins that constitute the bent portion, and is formed on the upper side of the bent heat exchanger, and an edge of the fin is a linear upper rectangular heat exchanger, Formed on the lower side of the bent heat exchanger, and the edge of the fin is integrally provided with a linear lower rectangular heat exchanger,
In the upper rectangular heat exchanger and the lower rectangular heat exchanger, the heat transfer tubes arranged on the adjacent row lines are arranged in a staggered manner in the air flow direction on the plurality of row lines. The air conditioner according to claim 1 , wherein the plurality of heat transfer tubes are arranged.   The air conditioner according to claim 1 or 2, wherein the heat exchanger is configured by combining a front side heat exchanger including the fin-shaped fins and a back side heat exchanger. Machine. At least one said heat transfer tubes are arranged between the column lines adjacent is characterized by being disposed in the bending portion, the air conditioner according to claim 1.   At least one of the heat transfer tubes disposed between the adjacent column lines is disposed between a column line closest to the cross-flow fan and a column line adjacent to the column line. The air conditioner according to claim 1 or 2. The air conditioner according to claim 5 , wherein the number of the heat transfer tubes arranged between a row line closest to the cross-flow fan and a row line adjacent to the row line is one. .   The air conditioner according to claim 1 or 2, wherein the refrigerant is R32. A plurality of heat transfer tubes through which the refrigerant flows, and a plurality of fins that are thermally connected to the heat transfer tubes and have bent portions with bent edges.
The plurality of heat transfer tubes are arranged to penetrate the fins to form a plurality of row lines,
Between the adjacent row lines, at least one heat transfer tube is disposed through the fin ,
The heat exchanger for an air conditioner , wherein at least one of the heat transfer tubes disposed between the adjacent row lines is disposed at the bent portion . The heat exchanger for an air conditioner according to claim 8 , wherein the fin has a square shape.

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