JP5476789B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger.

  2. Description of the Related Art Conventionally, some air conditioners include a fan that generates an air flow and a heat exchanger that is curved so as to surround a peripheral surface of the fan. Some of such heat exchangers have a plurality of fins and a plurality of heat transfer tubes disposed through the fins.

  For example, an air conditioner disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 9-42699) is disposed on the upstream side in the airflow direction with respect to the crossflow fan (corresponding to a fan) that generates an airflow and the crossflow fan. And a front heat exchanger (corresponding to a heat exchanger) 4A having a curved shape. The front heat exchanger 4A includes a plurality of radiating fins (corresponding to fins) 8 arranged at predetermined intervals, and a heat exchanging pipe (corresponding to a heat transfer tube) 9 penetrating the plurality of radiating fins 8. It is composed of

  Furthermore, the heat exchange pipes 9 are arranged so as to constitute an upwind row located upstream in the airflow direction and a leeward row located downstream in the airflow direction from the upwind row. Specifically, the heat exchange pipes 9 are arranged at the same interval A as shown in FIG. Further, in the leeward side row, the heat exchange pipes 9 at the lower end portions are arranged at the same interval A as the interval between the heat exchange pipes 9 in the upwind row, and the heat exchange pipes 9 other than the lower end portion are located on the upwind side. It arrange | positions at the space | interval B narrower than the space | interval A of the heat exchange pipes 9 in a row | line | column. Furthermore, the heat exchange pipes 9 in each row are arranged at intervals C different from the above intervals (interval A and interval B) so as to be staggered.

  By the way, in order to form the refrigerant | coolant flow path in a heat exchanger, opening of the edge part of an adjacent heat exchanger tube may be connected by piping components, such as a U bend. Moreover, the piping component for connecting the opening of the edge part of a heat exchanger tube may require the kind according to the said distance because the distance between heat exchanger tubes differs.

  For example, in the front surface side heat exchanger 4A of Patent Document 1, there are three types of distances between the heat exchange pipes 9 (interval A, interval B, and interval C). For this reason, in order to connect the opening of the adjacent heat exchange pipe 9, three types of piping components are needed. Thus, since there are many types of distances between the heat transfer tubes, it is necessary to use the types of piping parts corresponding to the distances, which may increase the cost.

  Then, the subject of this invention is providing the heat exchanger which can implement | achieve low cost.

The heat exchanger according to the first invention includes a plurality of fins and a plurality of main heat transfer sections. The main heat transfer portion extends through the fin in a direction intersecting the air flow. Moreover, the fin has the curved curved part and the linear straight part in the penetration direction view of the main heat-transfer part. Two main heat transfer parts arranged adjacent to each other are connected by an end connecting pipe or a hairpin part. The end connecting pipe is a member for connecting the ends of the two main heat transfer units disposed adjacent to each other. Moreover, the hairpin part is formed continuously from the main heat transfer part. Further, the main heat transfer parts connected by the end connecting pipe or the hairpin part are arranged so as to be separated by either one of the first predetermined distance and the second predetermined distance in the curved part and the straight part . Yes. The main heat transfer section includes a plurality of upstream main heat transfer sections and a plurality of downstream main heat transfer sections. The downstream main heat transfer section is disposed on the air flow downstream side of the upstream main heat transfer section. The upstream main heat transfer section and the downstream main heat transfer section are arranged in a staggered manner. Furthermore, the upstream main heat transfer section includes a first upstream main heat transfer section and a second upstream main heat transfer section adjacent to the first upstream main heat transfer section in the curved portion. The downstream main heat transfer section includes a first downstream main heat transfer section adjacent to the first upstream main heat transfer section and the second upstream main heat transfer section in the curved portion. Further, when the first downstream main heat transfer section and the first upstream main heat transfer section are arranged to be separated from each other by a first predetermined distance, the first downstream main heat transfer section and the second upstream side The main heat transfer section is arranged at a second predetermined distance.

  In the heat exchanger according to the first aspect of the invention, in the bending portion, the main heat transfer portions connected by the end connecting pipe or the hairpin portion are separated by one of the first predetermined distance and the second predetermined distance. Is arranged. For this reason, for example, compared with the case where there are three types of distances between the main heat transfer parts connected by the end connecting pipe, the types of the end connecting pipes can be reduced. Moreover, when the two main heat-transfer parts connected by the hairpin part and the hairpin part are made into one hairpin-shaped heat transfer tube, for example, the distance between the ends of the main heat-transfer parts connected by the hairpin part is Compared to the case where there are three types, the types of hairpin-shaped heat transfer tubes can be reduced.

  Thereby, low cost can be realized.

In this heat exchanger, the upstream main heat transfer section and the downstream main heat transfer section are arranged in a staggered manner. For this reason, the air which performs heat exchange can be efficiently made to contact an upstream main heat-transfer part and a downstream main heat-transfer part.

  Furthermore, in this heat exchanger, when the first downstream main heat transfer section and the first upstream main heat transfer section are arranged so as to be separated from each other by a first predetermined distance, the first downstream main heat transfer section is disposed. And the second upstream main heat transfer section are spaced apart from each other by a second predetermined distance. For this reason, in the curved portion, the distance between the upstream main heat transfer portion and the downstream main heat transfer portion can be arranged at a distance of the first predetermined distance or the second predetermined distance.

  When the first downstream main heat transfer section and the first upstream main heat transfer section are arranged so as to be separated by a second predetermined distance, the first downstream main heat transfer section and the second upstream side The main heat transfer unit may be arranged at a first predetermined distance. Further, in the upstream main heat exchange part and the downstream main heat exchange part, the portion where the upstream main heat exchange part and the downstream main heat exchange part are arranged as described above is the entire curved part of the fin. Or a part thereof.

  The heat exchanger according to the second invention includes a plurality of fins and a plurality of main heat transfer sections. The main heat transfer portion extends through the fin in a direction intersecting the air flow. The fin has a curved curved portion and a straight straight portion in the penetration direction view of the main heat transfer portion. Further, the main heat transfer parts are arranged so as to be separated from each other by either the first predetermined distance or the second predetermined distance in the curved part and the straight part. The second predetermined distance is a distance different from the first predetermined distance. The main heat transfer section includes a plurality of upstream main heat transfer sections and a plurality of downstream main heat transfer sections. The downstream main heat transfer section is disposed on the air flow downstream side of the upstream main heat transfer section. The upstream main heat transfer section and the downstream main heat transfer section are arranged in a staggered manner. Furthermore, the upstream main heat transfer section includes a first upstream main heat transfer section and a second upstream main heat transfer section adjacent to the first upstream main heat transfer section in the curved portion. The downstream main heat transfer section includes a first downstream main heat transfer section adjacent to the first upstream main heat transfer section and the second upstream main heat transfer section in the curved portion. Further, when the first downstream main heat transfer section and the first upstream main heat transfer section are arranged to be separated from each other by a first predetermined distance, the first downstream main heat transfer section and the second upstream side The main heat transfer section is arranged at a second predetermined distance.

  In the heat exchanger according to the second aspect of the present invention, the main heat transfer portions are arranged in the bending portion so as to be separated from each other by either the first predetermined distance or the second predetermined distance. For this reason, for example, when the ends of adjacent main heat transfer parts are connected by pipe parts, the distance between the main heat transfer parts connected by the pipe parts is compared with a heat exchanger in which three types exist. Therefore, the types of piping parts can be reduced.

  Thereby, low cost can be realized.

  In this heat exchanger, the upstream main heat transfer section and the downstream main heat transfer section are arranged in a staggered manner. For this reason, the air which performs heat exchange can be efficiently made to contact an upstream main heat-transfer part and a downstream main heat-transfer part.

  Furthermore, in this heat exchanger, when the first downstream main heat transfer section and the first upstream main heat transfer section are arranged so as to be separated from each other by a first predetermined distance, the first downstream main heat transfer section is disposed. And the second upstream main heat transfer section are spaced apart from each other by a second predetermined distance. For this reason, in the curved portion, the distance between the upstream main heat transfer portion and the downstream main heat transfer portion can be arranged at a distance of the first predetermined distance or the second predetermined distance.

  When the first downstream main heat transfer section and the first upstream main heat transfer section are arranged so as to be separated by a second predetermined distance, the first downstream main heat transfer section and the second upstream side The main heat transfer unit may be arranged at a first predetermined distance. Further, in the upstream main heat exchange part and the downstream main heat exchange part, the portion where the upstream main heat exchange part and the downstream main heat exchange part are arranged as described above is the entire curved part of the fin. Or a part thereof.

A heat exchanger according to a third aspect of the present invention is the heat exchanger according to the first or second aspect of the present invention , wherein the upstream main heat transfer section is a curved section, the first upstream main heat transfer section and the second upstream side. A third upstream main heat transfer section is further included separately from the main heat transfer section. The downstream main heat transfer section further includes a second downstream main heat transfer section and a third downstream main heat transfer section in addition to the first downstream main heat transfer section in the curved portion. The upstream main heat transfer section is arranged in the order of the first upstream main heat transfer section, the second upstream main heat transfer section, and the third upstream main heat transfer section along the first direction. The first direction is a direction from one end side of the fin toward the other end side. The downstream main heat transfer section is arranged in the order of the first downstream main heat transfer section, the second downstream main heat transfer section, and the third downstream main heat transfer section along the first direction. Further, the upstream main heat transfer section and the downstream main heat transfer section are arranged such that the first upstream main heat transfer section and the first downstream main heat transfer section are separated by a first predetermined distance. Are arranged such that the first downstream main heat transfer section and the second upstream main heat transfer section are separated by a second predetermined distance, and the second upstream main heat transfer section and the second downstream main heat transfer section Are arranged so as to be separated from each other by a first predetermined distance, and the second downstream main heat transfer section and the third upstream main heat transfer section are arranged so as to be separated from each other by a second predetermined distance. And the third downstream main heat transfer section are arranged so as to be separated from each other by a first predetermined distance. For this reason, in this heat exchanger, the distance between the upstream main heat transfer portion and the downstream main heat transfer portion can be arranged at the curved portion by being separated by the first predetermined distance or the second predetermined distance.

  The upstream main heat transfer section and the downstream main heat transfer section are arranged such that the first upstream main heat transfer section and the first downstream main heat transfer section are separated by a second predetermined distance. Are arranged such that the first downstream main heat transfer section and the second upstream main heat transfer section are separated by a first predetermined distance, and the second upstream main heat transfer section and the second downstream main heat transfer section Are arranged so as to be separated from each other by a second predetermined distance, and the second downstream main heat transfer section and the third upstream main heat transfer section are arranged to be separated from each other by a first predetermined distance. And the third downstream main heat transfer section may be arranged so as to be separated by a second predetermined distance.

A heat exchanger according to a fourth aspect is the heat exchanger according to the third aspect , wherein the first predetermined distance is greater than the second predetermined distance. Further, in the upstream main heat transfer section, the first upstream main heat transfer section and the second upstream main heat transfer section are arranged apart from each other by a first predetermined distance. In the upstream main heat transfer section, the second upstream main heat transfer section and the third upstream main heat transfer section are arranged apart from each other by a first predetermined distance. Further, in the downstream main heat transfer section, the first downstream main heat transfer section and the second downstream main heat transfer section are arranged apart from each other by a second predetermined distance. In the downstream main heat transfer section, the second downstream main heat transfer section and the third downstream main heat transfer section are arranged apart from each other by a second predetermined distance. For this reason, in this heat exchanger, the upstream main heat transfer section and the downstream main heat transfer section can be arranged along the first direction.

A heat exchanger according to a fifth aspect is the heat exchanger according to the third aspect , wherein the first predetermined distance is greater than the second predetermined distance. Furthermore, in the upstream main heat transfer section, the first upstream main heat transfer section and the second upstream main heat transfer section are arranged apart from each other by a first predetermined distance. Further, in the upstream main heat transfer section, the second upstream main heat transfer section and the third upstream main heat transfer section are arranged apart from each other by a first predetermined distance. Furthermore, in the downstream main heat transfer section, when the first downstream main heat transfer section and the second downstream main heat transfer section are arranged apart from each other by the first predetermined distance, the second downstream main heat transfer section is disposed. The heat section and the third downstream main heat transfer section are disposed apart from each other by a second predetermined distance. For this reason, in this heat exchanger, the upstream main heat transfer section and the downstream main heat transfer section can be arranged along the first direction.

  In the downstream main heat transfer section, when the first downstream main heat transfer section and the second downstream main heat transfer section are spaced apart by a second predetermined distance, the second downstream main heat transfer section is disposed. The heat section and the third downstream main heat transfer section may be arranged apart from each other by a first predetermined distance.

  In the heat exchanger according to the first invention, low cost can be realized.

  In the heat exchanger according to the second invention, low cost can be realized.

In the heat exchanger according to the third aspect of the present invention, the distance between the upstream side heat transfer tube and the downstream side heat transfer tube can be spaced apart by the first predetermined distance or the second predetermined distance in the bending portion.

In the heat exchanger according to the fourth aspect of the invention, the upstream heat transfer tube and the downstream heat transfer tube can be arranged along the first direction.

In the heat exchanger according to the fifth aspect of the invention, the upstream heat transfer tube and the downstream heat transfer tube can be arranged along the first direction.

The external appearance perspective view of an air conditioner provided with the indoor heat exchanger which concerns on 1st Embodiment of this invention. The schematic longitudinal cross-sectional view of an indoor unit. The longitudinal cross-sectional view of an indoor heat exchanger (a heat exchanger tube is abbreviate | omitted). The external appearance perspective view of a 1st heat exchange part. The schematic front view of a 1st heat exchange part. It is a longitudinal cross-sectional view of a 2nd heat exchange part, Comprising: The elements on larger scale in the curved part of a 2nd fin. The side view of a 2nd heat exchange part. The side view of a 2nd heat exchange part. The schematic of the hairpin-shaped heat exchanger tube which the indoor heat exchanger which concerns on a modification (A) has. The side view of the 2nd heat exchange part with which the indoor heat exchanger which concerns on a modification (A) is provided. The side view of the 2nd heat exchange part with which the indoor heat exchanger which concerns on a modification (A) is provided. The side view of the 2nd heat exchange part with which the indoor heat exchanger which concerns on a modification (C) is provided. The longitudinal cross-sectional view of the 2nd heat exchange part with which the indoor heat exchanger which concerns on 2nd Embodiment of this invention is provided. It is a longitudinal cross-sectional view of a 2nd heat exchange part, Comprising: The elements on larger scale in the curved part of a 2nd fin. The side view of a 2nd heat exchange part. The side view of a 2nd heat exchange part. The longitudinal cross-sectional view of the conventional indoor heat exchanger.

-First embodiment-
<Configuration of air conditioner>
FIG. 1 is an external perspective view of an air conditioner.

  As shown in FIG. 1, the air conditioner 1 includes an indoor unit 10 and an outdoor unit 20, and can perform normal operations such as a cooling operation and a heating operation. The air conditioner 1 takes indoor air into the indoor unit 10 from the air intake 6, performs air conditioning on the taken-in air, and blows out air-conditioned air from the air outlet 4 into the room.

  An indoor heat exchanger 12 and the like which will be described later are accommodated in the indoor unit 10, and an outdoor heat exchanger which will be described later is accommodated in the outdoor unit 20. And the refrigerant circuit is comprised because the indoor heat exchanger 12 in the indoor unit 10 and the outdoor heat exchanger in the outdoor unit 20 are connected by refrigerant | coolant piping. The refrigerant circuit includes a compressor housed in the outdoor unit 20, a four-way switching valve, an electric expansion valve, and an accumulator.

  A compressor raises the pressure of the refrigerant | coolant which flows in a refrigerant circuit, and sends out a refrigerant | coolant. The four-way switching valve is connected to the discharge side of the compressor, and changes the refrigerant flow path between the cooling operation and the heating operation. The outdoor heat exchanger is connected to the four-way switching valve, and functions as an evaporator during heating operation and as a condenser during cooling operation. The outdoor heat exchanger exchanges heat with the air sucked into the outdoor unit 20 by an outdoor fan arranged adjacent to the outdoor heat exchanger. The electric expansion valve is connected to the outdoor heat exchanger and functions as an expansion mechanism that changes the pressure of the refrigerant. For example, during the cooling operation, the refrigerant is expanded in a throttled state in order to cause the indoor heat exchanger 12 to function as an evaporator. The accumulator is connected to the suction side of the compressor and prevents liquid refrigerant from entering the compressor.

  Next, the configuration of the indoor unit 10 will be described.

<Configuration of indoor unit>
FIG. 2 is a schematic longitudinal sectional view of the indoor unit 10 when the air conditioner 1 is in an operating state.

  The indoor unit 10 is a wall-mounted indoor unit that is attached to a wall surface of the room, and includes an indoor unit casing 5, an indoor fan 11, and an indoor heat exchanger 12.

  The indoor unit casing 5 accommodates an indoor heat exchanger 12, an indoor fan 11, and the like. Moreover, as shown in FIG. 1 and FIG. 2, an air intake 6 and an air outlet 4 for air conditioning are formed in the indoor unit casing 5.

  The air intake 6 is provided in the upper part of the indoor unit casing 5 and is an opening for taking indoor air into the indoor unit casing 5. Indoor air is taken into the indoor unit casing 5 from the air intake 6 by the indoor fan 11.

  The air outlet 4 is provided in the lower front part of the indoor unit casing 5. A horizontal flap 7 is provided in the vicinity of the air outlet 4 so as to cover the air outlet 4. The horizontal flap 7 is rotationally driven by a flap motor (not shown) to change the air guiding direction and open / close the air outlet 4.

  The indoor fan 11 is a cross-flow fan configured in a cylindrical shape and provided with blades on the circumferential surface in the direction of the rotation axis. The indoor fan 11 generates an air flow F in a direction intersecting with the rotation axis by being driven to rotate. Moreover, the indoor fan 11 is arrange | positioned in the air flow F downstream of the indoor heat exchanger 12, as shown in FIG. For this reason, the indoor fan 11 sucks the indoor air into the indoor unit 10 and blows out the air after heat exchange with the indoor heat exchanger 12 into the room.

  Next, the configuration of the indoor heat exchanger 12 will be described.

<Configuration of indoor heat exchanger>
FIG. 3 is a schematic longitudinal sectional view of the indoor heat exchanger 12. FIG. 4 is an external perspective view of the first heat exchange unit 50. FIG. 5 is a schematic front view of the first heat exchange unit 50. 4 and 5, reference numeral L <b> 1 indicates the thickness direction of the first fin 51.

  As shown in FIG. 2, the indoor heat exchanger 12 is disposed so as to surround the front and rear upper portions of the indoor fan 11. Further, as described above, the indoor heat exchanger 12 causes the air taken in from the air intake port 6 to pass to the indoor fan 11 side by driving the indoor fan 11, and passes through the heat transfer tube 70 described later. Exchange heat with the passing refrigerant. The indoor heat exchanger 12 has a shape bent in a substantially inverted V shape in a side view.

  As shown in FIGS. 2 and 3, the indoor heat exchanger 12 includes a first heat exchange unit 50 and a second heat exchange unit 60. Moreover, the 1st heat exchange part 50 and the 2nd heat exchange part 60 have a long shape in the horizontal direction (plate thickness direction L1), respectively (refer FIG. 4 and FIG. 5).

  As shown in FIG. 4, the first heat exchange unit 50 has a long straight shape in the plate thickness direction L1. Further, as shown in FIG. 2, the first heat exchanging unit 50 is disposed such that the upper end thereof is inclined toward the front of the indoor unit 10 and covers the rear upper portion of the indoor fan 11. ing.

  The 2nd heat exchange part 60 is exhibiting the shape long in the plate | board thickness direction L1, and has the shape where the upper part curved in the side view of the indoor heat exchanger 12, as shown in FIG. Further, the second heat exchange unit 60 is disposed in front of the first heat exchange unit 50. Furthermore, the upper end of the second heat exchange unit 60, that is, the end portion on the curved side is close to the upper end of the first heat exchange unit 50. Further, the second heat exchanging unit 60 is disposed so as to cover the front portion from above the indoor fan 11.

  The first heat exchange unit 50 and the second heat exchange unit 60 include a plurality of strip-shaped fins 51, 61, a plurality of heat transfer tubes 70 that pass through the fins 51, 61 and extend linearly, and two types of U Bend pipes 71 and 72 are provided.

  FIG. 6 is a longitudinal sectional view of the second heat exchanging portion 60 as viewed from the penetration direction of the heat transfer tube 70, and is a partially enlarged view of the curved portion 61 a of the second fin 61. FIG. 7 is a side view of the second heat exchange unit 60 viewed from one end side. FIG. 8 is a side view of the second heat exchange unit 60 viewed from the other end side.

  The fins 51 and 61 are metal plate-shaped members. In addition, a plurality of fins 51 and 61 are arranged at predetermined intervals in the plate thickness direction L1. Further, circular through holes 54, 55, 64, 65 penetrating in the plate thickness direction L1 are formed in the fins 51, 61 at a predetermined interval. In addition, the plurality of through holes 54, 55, 64, 65 are air flows more than the upstream through holes 54, 64 positioned upstream of the air flow F generated by the indoor fan 11 and the upstream through holes 54, 64. F has downstream through holes 55 and 65 located on the downstream side. Note that the heat transfer tube 70 is fitted into the through-hole in the plate thickness direction L1 of the fins 51 and 61. Hereinafter, the fins constituting the first heat exchange unit 50 are referred to as first fins 51, and the fins constituting the second heat exchange unit 60 are referred to as second fins 61.

  As shown in FIG. 4, the first fin 51 has a substantially rectangular shape when viewed in the plate thickness direction L <b> 1 of the first fin 51, that is, when viewed through the heat transfer tube 70. Further, the first fin 51 is formed with an upstream through hole 54 and a downstream through hole 55 penetrating in the plate thickness direction L1 in a staggered manner. As shown in FIG. 3, the upstream side through hole 54 is disposed on the upstream side of the air flow F with respect to the downstream side through hole 55.

  Further, in the first fin 51, the upstream side through holes 54 are formed so as to be separated by a first predetermined distance A as shown in FIG. Further, in the first fin 51, the downstream through holes 55 are formed so as to be separated by a first predetermined distance A. Further, in the first fin 51, the upstream side through hole 54 and the downstream side through hole 55 are formed in a staggered manner so as to be separated by a second predetermined distance B.

  The second fin 61 has a curved portion 61a that has a curved shape so as to surround a part of the peripheral surface of the indoor fan 11 when viewed in the plate thickness direction L1 of the second fin 61, that is, when viewed through the heat transfer tube 70. And a straight portion 61b formed continuously from the curved portion 61a. The curved part 61 a constitutes the upper part of the second fin 61, and the straight part 61 b constitutes a part other than the curved part 61 a of the second fin 61, that is, the lower part of the second fin 61.

  Similarly to the first fin 51, the second fin 61 is formed with an upstream through hole 64 and a downstream through hole 65 that penetrate in the plate thickness direction L <b> 1. As shown in FIG. 3, the upstream side through hole 64 is disposed on the upstream side of the air flow F with respect to the downstream side through hole 65. As shown in FIG. 6, for convenience of explanation, in the curved portion 61 a of the second fin 61, the upstream located in the vicinity (one end side) of one end portion 61 c of the second fin 61 among the upstream side through holes 64. The side through hole is referred to as an upstream side through hole 64 or a first upstream side through hole 64a, and the upstream side through hole formed adjacent to the first upstream side through hole 64a in the upstream side through hole 64 is passed through the upstream side. It is referred to as a hole 64 or a second upstream side through hole 64b, and the upstream side through hole formed adjacent to the second upstream side through hole 64b in the upstream side through hole 64 is defined as the upstream side through hole 64 or the third upstream side. This is referred to as a through hole 64c. Further, in the curved portion 61 a of the second fin 61, the downstream through hole located closest to one end portion 61 c of the second fin 61 among the downstream through holes 65 is defined as the downstream through hole 65 or the first downstream through hole. A downstream through hole formed adjacent to the first downstream through hole 65a in the downstream through hole 65 is referred to as a downstream through hole 65 or a second downstream through hole 65b. The downstream through hole formed adjacent to the second downstream through hole 65b in the through hole 65 is referred to as a downstream through hole 65 or a third downstream through hole 65c. In other words, if the direction from the one end 61c side of the second fin 61 toward the other end 61d (see FIG. 3) is the first direction Y, the first upstream through hole 64a and the second upstream through The hole 64b and the third upstream side through hole 64c are arranged along the first direction Y in the order of the first upstream side through hole 64a, the second upstream side through hole 64b, and the third upstream side through hole 64c. The first downstream through-hole 65a, the second downstream through-hole 65b, and the third downstream through-hole 65c are arranged along the first direction Y in the first downstream through-hole 65a and the second downstream through-hole 65b. The third downstream through-hole 65c is arranged in this order.

  The first upstream through hole 64a and the second upstream through hole 64b are formed to be separated by a first predetermined distance A as shown in FIG. Further, the second upstream side through hole 64b and the third upstream side through hole 64c are formed to be separated from each other by a first predetermined distance A. In this way, in the curved portion 61a of the second fin 61, the upstream side through holes 64 are formed so as to be separated from each other by the first predetermined distance A as shown in FIG.

  Further, the first downstream through hole 65a and the second downstream through hole 65b are formed so as to be separated by a second predetermined distance B as shown in FIG. The second predetermined distance B is smaller than the first predetermined distance A. In other words, the first predetermined distance A is larger than the second predetermined distance B. Further, the second downstream side through hole 65b and the third downstream side through hole 65c are formed to be separated from each other by a second predetermined distance B. As described above, in the curved portion 61a of the second fin 61, the downstream through holes 65 are formed so as to be separated from each other by the second predetermined distance B as shown in FIG.

  Further, the first upstream through hole 64a and the first downstream through hole 65a are formed so as to be separated by a second predetermined distance B as shown in FIG. The first downstream through hole 65a and the second upstream through hole 64b are formed to be separated by a first predetermined distance A, as shown in FIG. The second upstream through hole 64b and the second downstream through hole 65b are formed to be separated by a second predetermined distance B as shown in FIG. The second downstream side through hole 65b and the third upstream side through hole 64c are formed to be separated by a first predetermined distance A as shown in FIG. The third upstream through hole 64c and the third downstream through hole 65c are formed so as to be separated by a second predetermined distance B as shown in FIG. Thus, in the curved portion 61a of the second fin 61, the upstream side through hole 64 and the downstream side through hole 65 are separated from each other by the first predetermined distance A or the second predetermined distance B as shown in FIG. It is formed in a staggered pattern.

  In the present embodiment, the first upstream through hole 64a and the first downstream through hole 65a are formed so as to be separated by a second predetermined distance B, and the first downstream through hole 65a and the second upstream side are formed. The through hole 64b is formed to be separated by a first predetermined distance A, and the second upstream through hole 64b and the second downstream through hole 65b are formed to be separated by a second predetermined distance B, The second downstream through hole 65b and the third upstream through hole 64c are formed so as to be separated from each other by a first predetermined distance A, and the third upstream through hole 64c and the third downstream through hole 65c are the second. It is formed so as to be separated by a predetermined distance B. Instead, the first upstream through-hole and the first downstream through-hole are formed so as to be separated by a first predetermined distance A, and the first downstream through-hole and the second upstream through-hole are first 2 is formed to be separated by a predetermined distance B, and the second upstream through hole and the second downstream through hole are formed to be separated by a first predetermined distance A, and the second downstream through hole and the second downstream through hole are The third upstream through hole is formed so as to be separated from the second predetermined distance B, and the third upstream through hole and the third downstream through hole are formed so as to be separated from each other by the first predetermined distance A. Good.

  Further, in the straight portion 61b of the second fin 61, the upstream side through holes 64 are formed to be separated from each other by a first predetermined distance A as shown in FIG. Further, in the straight portion 61 b of the second fin 61, the downstream side through holes 65 are formed so as to be separated from each other by a first predetermined distance A. Further, in the straight portion 61b of the second fin 61, the upstream side through hole 64 and the downstream side through hole 65 are formed in a staggered manner so as to be separated from each other by a second predetermined distance B.

  In addition, the distance between adjacent through holes here is specifically the distance connecting the centers of adjacent through holes. Therefore, for example, “in the first fin 51, the upstream through holes 54 are formed so as to be separated from each other by the first predetermined distance A” specifically means that the adjacent upstream through holes 54 are adjacent to each other. This means that the distance connecting the centers is a first predetermined distance A apart.

  The heat transfer tube 70 is a straight pipe, and the heat transfer tube 70 extends through the fins 51 and 61 in a direction intersecting with the air flow F. Specifically, the heat transfer tubes 70 are parallel to the longitudinal direction (plate thickness direction L1) of the heat exchange portions 50 and 60, and the respective through holes 54, 55, 64 and 65 are inserted (see FIG. 5). For this reason, the plurality of heat transfer tubes 70 are arranged such that the distance between the pipe centers of the adjacent heat transfer tubes 70 is separated by either the first predetermined distance or the second predetermined distance. Further, since the upstream side through holes 54 and 64 and the downstream side through holes 55 and 65 are formed in a staggered manner in the plurality of fins 51 and 61, the heat transfer tubes (upstream side) through which the upstream side through holes 54 and 64 are inserted. The heat transfer tubes 70 (corresponding to the heat transfer tubes) 70 and the heat transfer tubes 70 (through the downstream heat transfer tubes) 70 that pass through the downstream through holes 55 and 65 are arranged in a staggered manner. Furthermore, the heat transfer tube 70 (hereinafter referred to as the first upstream heat transfer tube 70a) that passes through the first upstream through hole 64a and the heat transfer tube 70 (hereinafter referred to as the first downstream heat transfer tube) that passes through the first downstream through hole 65a. 70d) is arranged apart by a second predetermined distance. The first downstream heat transfer tube 70d and the heat transfer tube 70 that passes through the second upstream through hole 64b (hereinafter referred to as the second upstream heat transfer tube 70b) are disposed apart by a first predetermined distance A. The second upstream heat transfer tube 70b and the heat transfer tube 70 inserted through the second downstream through-hole 65b (hereinafter referred to as a second downstream heat transfer tube 70e) are arranged apart from each other by a second predetermined distance B. The second downstream heat transfer tube 70e and the heat transfer tube 70 (hereinafter referred to as the third upstream heat transfer tube 70c) inserted through the third upstream through-hole 64c are spaced apart by a first predetermined distance A. The third upstream heat transfer tube 70c and the heat transfer tube 70 inserted through the third downstream through-hole 65c (hereinafter referred to as the third downstream heat transfer tube 70f) are arranged apart from each other by a second predetermined distance B. Further, the first upstream heat transfer tube 70a and the second upstream heat transfer tube 70b are arranged so as to be separated by a first predetermined distance A. The second upstream heat transfer tube 70b and the third upstream heat transfer tube 70c are arranged apart from each other by a first predetermined distance A. Further, the first downstream heat transfer tube 70d and the second downstream heat transfer tube 70e are arranged apart from each other by a second predetermined distance B. The second downstream heat transfer tube 70e and the third downstream heat transfer tube 70f are arranged apart from each other by a second predetermined distance B.

  Further, both ends of the plurality of heat transfer tubes 70 are fixed by tube plates. For example, in the 1st heat exchange part 50, as shown in FIG.4 and FIG.5, the both ends are fixing the some heat exchanger tube 70 with the tube sheet 59. FIG. For this reason, in each heat exchange part 50 and 60, the tube sheet is arrange | positioned so that the several fins 51 and 61 may be pinched | interposed.

  The U-bend pipes 71 and 72 are substantially U-shaped piping parts, and connect the end portions of the adjacent heat transfer tubes 70 at the end portions of the heat transfer tubes 70 protruding from the tube plate 59. Further, the U bend pipes 71 and 72 are fitted and fixed to the end portions of the adjacent heat transfer pipes 70. Therefore, a plurality of heat transfer tubes 70 and a plurality of U bend tubes 71 and 72 are combined to form one refrigerant flow path.

  Further, the U-bend pipes 71 and 72 are disposed at a distance of a second predetermined distance B from the first U-bend pipe 71 that connects ends of the heat transfer pipes 70 that are arranged at a first predetermined distance A apart from each other. And a second U-bend pipe 72 that connects ends of the heat pipe 70.

  As shown in FIG. 5, in the first heat exchange unit 50, the first U bend pipe 71 is disposed so as to protrude from one end side of the first heat exchange unit 50. Furthermore, as shown in FIG. 5, in the first heat exchange unit 50, the second U bend pipe 72 is disposed so as to protrude from the other end side of the first heat exchange unit 50.

  In the second heat exchange unit 60, the first U bend pipe 71 is disposed so as to protrude from one end side of the second heat exchange unit 60. Further, in the second heat exchange unit 60, the second U bend pipe 72 is disposed so as to protrude from the other end side of the second heat exchange unit 60. Specifically, in the second heat exchanging unit 60, the first U bend pipe 71 connects the heat transfer pipes 70 arranged apart from each other by a first predetermined distance A as shown in FIG. Moreover, in the 2nd heat exchange part 60, the 2nd U bend pipe | tube 72 has connected the heat exchanger tubes 70 arrange | positioned only the 2nd predetermined distance B, as shown in FIG.

  With this configuration, in the indoor heat exchanger 12, the heat transfer tubes 70 connected by the U-bend tubes 71 and 72 are separated from each other by either the first predetermined distance A or the second predetermined distance B. Is arranged. For this reason, in this indoor heat exchanger 12, the heat transfer tubes 70 constituting the indoor heat exchanger 12 can be connected by the two types of U-bend tubes 71 and 72.

  In the present embodiment, the heat transfer tubes 70 connected by the U-bend tubes 71 and 72 are arranged so as to be separated by either one of the first predetermined distance A and the second predetermined distance B. However, the present invention is not limited to this, and it is only necessary that the heat transfer tubes connected by the U-bend tube are arranged at least one of the first predetermined distance and the second predetermined distance at least in the bending portion.

<Features>
(1)
Conventionally, when the fins are formed in a curved shape, the degree of freedom of arrangement of the heat transfer tubes penetrating the fins increases, so the types of distances between the heat transfer tubes may increase. For example, in a heat exchanger, when one refrigerant flow path is configured by combining a plurality of straight heat transfer tubes and a plurality of U bend tubes, the U bend tubes connect adjacent heat transfer tubes to each other. At least the type of distance between the heat transfer tubes is required. For this reason, since the kind of piping parts, such as a U-bend pipe | tube which connects heat exchanger tubes, increases, there exists a problem that cost increases.

  Therefore, in the above embodiment, the heat transfer tubes 70 connected by the U-bend tubes 71 and 72 in the curved portion 61a of the second fin 61 are either the first predetermined distance A or the second predetermined distance B. Just placed away. For this reason, in this indoor heat exchanger 12, the heat transfer tubes 70 can be connected to each other by the two types of U-bend tubes 71 and 72. Therefore, for example, when at least three types of U-bend pipes are required, that is, when there are three types of distances between the heat transfer pipes connected by the U-bend pipes, the types of U-bend pipes are reduced. be able to.

  Thereby, low cost can be realized.

(2)
In the said embodiment, the heat exchanger tube 70 which penetrates the upstream through-holes 54 and 64 and the heat exchanger tube 70 which penetrates the downstream through-holes 55 and 65 are arrange | positioned at zigzag form. For this reason, the air which performs heat exchange can be made to contact each heat exchanger tube 70 efficiently.

  Thereby, heat exchange efficiency can be improved.

(3)
In the embodiment, the first downstream through hole 65a is adjacent to the second downstream through hole 65b. The second upstream through hole 64b is adjacent to the first downstream through hole 65a and the second downstream through hole 65b. Furthermore, the first downstream through hole 65a and the second upstream through hole 64b are formed so as to be separated by a first predetermined distance A. Further, the second upstream side through hole 64b and the second downstream side through hole 65b are formed to be separated from each other by a second predetermined distance B. For this reason, the first downstream heat transfer tube 70d, which is a heat transfer tube inserted through the first downstream through hole 65a, and the second upstream heat transfer tube 70b, which is a heat transfer tube inserted through the second upstream through hole 64b, 1 It is arranged so as to be separated by a predetermined distance A. The second downstream heat transfer tube 70e, which is a heat transfer tube passing through the second downstream through hole 65b, and the second upstream heat transfer tube 70b, which is a heat transfer tube passing through the second upstream through hole 64b, are the second It arrange | positions so that only the predetermined distance B may leave | separate. For this reason, in the curved part 61a of the 2nd fin 61, the heat transfer pipe 70 which penetrates the upstream through-hole 64 and the heat transfer pipe 70 which penetrates the downstream through-hole 65 are made into 1st predetermined distance A or 2nd predetermined distance B. Can only be placed apart.

(4)
In the above embodiment, the first upstream through hole 64a, the second upstream through hole 64b, and the third upstream through hole 64c are arranged along the first direction Y in the first upstream through hole 64a and the second upstream side. The through hole 64b and the third upstream side through hole 64c are arranged in this order. The first downstream through-hole 65a, the second downstream through-hole 65b, and the third downstream through-hole 65c are arranged along the first direction Y in the first downstream through-hole 65a and the second downstream through-hole 65b. The third downstream through-hole 65c is arranged in this order. Further, the first upstream through hole 64a and the first downstream through hole 65a are formed to be separated from each other by a second predetermined distance B. The first downstream through hole 65a and the second upstream through hole 64b are formed to be separated from each other by a first predetermined distance A. The second upstream side through hole 64b and the second downstream side through hole 65b are formed to be separated from each other by a second predetermined distance B. The second downstream side through hole 65b and the third upstream side through hole 64c are formed to be separated from each other by a first predetermined distance A. The third upstream side through hole 64c and the third downstream side through hole 65c are formed to be separated from each other by a second predetermined distance B. Therefore, the first upstream heat transfer tube 70a, which is a heat transfer tube inserted through the first upstream through hole 64a, and the first downstream heat transfer tube 70d, which is a heat transfer tube inserted through the first downstream through hole 65a, are: 2. Arranged at a predetermined distance. The first downstream heat transfer tube 70d, which is a heat transfer tube inserted through the first downstream through hole 65a, and the second upstream heat transfer tube 70b, which is a heat transfer tube inserted through the second upstream through hole 64b, have a first predetermined distance. A apart from each other. The second upstream heat transfer tube 70b, which is a heat transfer tube inserted through the second upstream through hole 64b, and the second downstream heat transfer tube 70e, which is a heat transfer tube inserted through the second downstream through hole 65b, are a second predetermined distance. B apart. The second downstream heat transfer tube 70e, which is a heat transfer tube inserted through the second downstream through hole 65b, and the third upstream heat transfer tube 70c, which is a heat transfer tube inserted through the third upstream through hole 64c, have a first predetermined distance. A apart from each other. The third upstream heat transfer tube 70c, which is a heat transfer tube passing through the third upstream through hole 64c, and the third downstream heat transfer tube 70f, which is a heat transfer tube passing through the third downstream through hole 65c, are a second predetermined distance. B apart. For this reason, in the curved part 61a of the 2nd fin 61, the heat transfer pipe 70 which penetrates the upstream through-hole 64 and the heat transfer pipe 70 which penetrates the downstream through-hole 65 are made into 1st predetermined distance A or 2nd predetermined distance B. Can only be placed apart.

(5)
In the embodiment, the first predetermined distance A is larger than the second predetermined distance B. The first upstream through hole 64a and the second upstream through hole 64b are formed so as to be separated by a first predetermined distance A. The second upstream side through hole 64b and the third upstream side through hole 64c are formed to be separated from each other by a first predetermined distance A. Thus, in the curved portion 61a of the second fin 61, the upstream side through holes 64 are formed so as to be separated from each other by the first predetermined distance A. Further, the first downstream side through hole 65a and the second downstream side through hole 65b are formed to be separated from each other by a second predetermined distance B. Further, the second downstream side through hole 65b and the third downstream side through hole 65c are formed to be separated from each other by a second predetermined distance B. Thus, in the curved portion 61a of the second fin 61, the downstream through holes 65 are formed so as to be separated from each other by the second predetermined distance B. Therefore, the first upstream heat transfer tube 70a, which is a heat transfer tube inserted through the first upstream through hole 64a, and the second upstream heat transfer tube 70b, which is a heat transfer tube inserted through the second upstream through hole 64b, 1 Arranged so as to be separated by a predetermined distance A. The second upstream heat transfer tube 70b, which is a heat transfer tube inserted through the second upstream through hole 64b, and the third upstream heat transfer tube 70c, which is a heat transfer tube inserted through the third upstream through hole 64c, have a first predetermined distance. A apart from each other. Further, the first downstream heat transfer tube 70d, which is a heat transfer tube inserted through the first downstream through hole 65a, and the second downstream heat transfer tube 70e, which is a heat transfer tube inserted through the second downstream through hole 65b, are the second They are arranged apart by a predetermined distance B. The second downstream heat transfer tube 70e, which is a heat transfer tube passing through the second downstream through hole 65b, and the third downstream heat transfer tube 70f, which is a heat transfer tube passing through the third downstream through hole 65c, are a second predetermined distance. B apart. Accordingly, in the curved portion 61 a of the second fin 61, the heat transfer tube 70 that passes through the upstream side through hole 64 and the heat transfer tube 70 that passes through the downstream side through hole 65 can be arranged in the direction along the first direction Y. it can.

  Thereby, in the curved part 61a of the 2nd fin 61, each heat exchanger tube 70 can be made into the curved arrangement | positioning along the curved part 61a.

<Modification>
(A)
In the above embodiment, the heat transfer tube 70 is a straight pipe.

  Instead of this, a pipe in which the heat transfer tube is bent into a hairpin shape (hereinafter referred to as a hairpin-shaped heat transfer tube) may be used.

  For example, it is a hairpin-shaped heat transfer tube 270 having two straight portions 270a arranged in parallel to each other and a hairpin portion 270b connecting between the ends of the straight portions 270a, as shown in FIG. The case where the hairpin-shaped heat transfer tube 270 having the first predetermined distance A as the distance connecting the centers of the pipe diameters of the respective straight portions 270a will be described.

  When the indoor heat exchanger is configured by inserting the hairpin-shaped heat transfer tube 270 through the first fin 51 and the second fin 61 having the same configuration as that of the above-described embodiment, the hairpin-shaped heat transfer tube 270 is directly separated by the second predetermined distance B. One refrigerant flow path can be configured by using a U-bend pipe that connects the ends of the 270a-like part 270a, that is, a U-bend pipe having the same configuration as the second U-bend pipe 72 of the above embodiment. Specifically, the hairpin-shaped heat transfer tube 270 is disposed so that the hairpin portion 270b is located at a portion where the first U bend tube 71 is disposed in the embodiment. Then, the ends of the straight portions 270a separated by the second predetermined distance B may be connected by a U bend pipe having the same configuration as the second U bend pipe 72 of the above embodiment.

  Thus, by using the hairpin-shaped heat transfer tube 270, the types of U-bend tubes for connecting the ends of the heat transfer tubes can be further reduced.

  In the above embodiment, in the second heat exchange unit 60, the first U bend pipe 71 is disposed so as to protrude from one end side of the second heat exchange unit 60. In the second heat exchange unit 60, the second U bend pipe 72 is disposed so as to protrude from the other end side of the second heat exchange unit 60. That is, the second U bend pipe 72 is not arranged at the end of the second heat exchange section 60 where the first U bend pipe 71 is arranged.

  Instead, as shown in FIGS. 10A and 10B, the first U bend pipe 71 and the second U bend pipe 72 may be disposed so as to protrude from both end sides of the second heat exchange section 360.

  In addition, in the 2nd heat exchange part 360 shown to FIG. 10A and 10B, since it is the structure similar to the 2nd heat exchange part 60 of the said embodiment except arrangement | positioning of the U bend pipes 71 and 72, each structural member On the other hand, the same reference numerals are given.

  Alternatively, one refrigerant channel may be configured by using two types of hairpin-shaped heat transfer tubes and two types of U-bend tubes.

  Specifically, the distance connecting the center of the pipe diameter of each straight portion is a first predetermined distance A, and the distance connecting the center of the pipe diameter of each straight portion is a second predetermined distance. The hairpin-shaped heat transfer tube having the distance B and the U-bend tube connecting the ends of the straight portions separated by the first predetermined distance A, that is, the U having the same configuration as the first U-bend tube 71 of the above embodiment. By using a bend pipe and a U bend pipe connecting the ends of the straight portions separated by the second predetermined distance B, that is, a U bend pipe having the same configuration as the second U bend pipe 72 of the above embodiment. One refrigerant circuit can be configured.

  Thus, in the 2nd heat exchange part which exhibits a curved shape, either of the 1st predetermined distance or the 2nd predetermined distance between the adjacent straight heat exchanger tubes or the adjacent straight portions of the hairpin heat exchanger tubes When arranged so as to be separated by only one distance, for example, compared to the case where there are three or more types of distances between adjacent heat transfer tubes, U bends connecting the ends of adjacent heat transfer tubes The type of tube can be reduced. Moreover, compared with the heat exchanger with which the distance of the linear part connected by a hairpin part exists in three or more types, the kind of apin-shaped heat exchanger tube can be reduced.

  Thereby, low cost can be realized.

(B)
In the said embodiment, the 1st heat exchange part 50 is exhibiting the straight shape long in the plate | board thickness direction L1, the 2nd heat exchange part 60 is long in the plate | board thickness direction L1, and is the side surface of the indoor heat exchanger 12. In view, the upper part has a curved shape.

  Instead, each of the first heat exchange unit and the second heat exchange unit may have a curved shape in a side view of the indoor heat exchanger. Thus, not only the 2nd heat exchange part but the 1st heat exchange part is made into the shape which curved, and compared with the indoor heat exchanger with which the 1st heat exchange part is straight, an indoor heat exchanger is made indoors. The shape along the peripheral surface of the fan can be obtained.

(C)
In the above embodiment, U-bend pipes 71 and 72 that are substantially U-shaped pipe parts are employed as the pipe parts.

  Instead of this, a straight heat transfer tube 470 or a hairpin heat transfer tube may be connected by a piping component 471 as shown in FIG. Note that the piping component 471 is connected to a header and an inlet / outlet pipe on the upstream side or the downstream side of the refrigerant.

  With such a configuration, the distance between the ends of the straight heat transfer tubes 470 connected by the piping component 471 or the distance between the straight portions of the hairpin heat transfer tubes is the first predetermined distance A or the second. In the case where the distance between any one of the predetermined distances B is arranged, for example, compared to the case where there are three or more types of distances between adjacent heat transfer tubes, the ends of adjacent heat transfer tubes are connected to each other. The types of piping parts to be connected can be reduced.

  Thereby, low cost can be realized.

  In FIG. 11, reference numeral 460 indicates a second heat exchange part, reference numeral 461 indicates a second fin, reference numeral 461a indicates a curved part, and reference numeral 464 indicates an upstream through hole. Reference numeral 465 indicates a downstream through hole.

-Second Embodiment-
An indoor heat exchanger according to a second embodiment of the present invention will be described. In addition, since structures other than the 2nd heat exchange part 160 with which the indoor heat exchanger which concerns on 2nd Embodiment of this invention is provided are the structures similar to the indoor heat exchanger 12 of 1st Embodiment, it is 2nd heat exchange. A description of components other than the unit 160 is omitted.

<Configuration of second heat exchange unit>
FIG. 12 is a longitudinal sectional view of the second heat exchange unit 160. FIG. 13 is a vertical cross-sectional view of the second heat exchange unit 160, and is a partially enlarged view of the curved portion 161 a of the second fin 161. FIG. 14 is a side view of the second heat exchange unit 160 viewed from one end side. FIG. 15 is a side view of the second heat exchange unit 160 viewed from the other end side.

  The second heat exchange unit 160 has a shape that is long in the horizontal direction (plate thickness direction L1), and has a shape in which the upper part is curved in a side view of the indoor heat exchanger. Moreover, the 2nd heat exchange part 160 is arrange | positioned ahead of the 1st heat exchange part. Furthermore, the upper end of the second heat exchange unit 160, that is, the end portion on the curved side is close to the upper end of the first heat exchange unit. Furthermore, the 2nd heat exchange part 160 is arrange | positioned so that a front part may be covered from the upper direction of an indoor fan.

  The second heat exchanging unit 160 includes a plurality of strip-shaped second fins 161, a plurality of heat transfer tubes 170 penetrating the second fins 161 and extending linearly, and two types of U-bend tubes 171 and 172. Have.

  The second fin 161 is continuously formed from a curved portion 161a and a curved portion 161a that are curved so as to surround a part of the peripheral surface of the indoor fan in the thickness direction of the second fin 161. And a straight portion 161b (see FIG. 12). The curved portion 161a constitutes the upper portion of the second fin 161, and the straight portion 161b constitutes a portion other than the curved portion 161a of the second fin 161, that is, the lower portion of the second fin 161.

  The second fin 161 is formed with a plurality of through holes 164 and 165 penetrating in the thickness direction at a predetermined interval. The plurality of through holes 164 and 165 include an upstream side through hole 164 and a downstream side through hole 165. As shown in FIG. 12, the upstream side through hole 164 is disposed on the upstream side of the air flow F with respect to the downstream side through hole 165. As shown in FIG. 13, for convenience of explanation, in the curved portion 161 a of the second fin 161, the upstream through hole located closest to one end portion 161 c of the second fin 161 among the upstream through holes 164 is formed. The upstream through-hole 164 or the first upstream through-hole 164a is referred to as an upstream through-hole formed in the upstream through-hole 164 adjacent to the first upstream through-hole 164a. 2 upstream through-holes 164b, and the upstream through-holes formed adjacent to the second upstream through-holes 164b in the upstream through-holes 164 are referred to as upstream through-holes 164 or third upstream through-holes 164c. . Further, in the curved portion 161a of the second fin 161, the downstream through-hole located at the one end portion 161c of the second fin 161 among the downstream through-holes 165 is the downstream through-hole 165 or the first downstream through-hole. A downstream through hole formed adjacent to the first downstream through hole 165a in the downstream through hole 165 is referred to as a downstream through hole 165 or a second downstream through hole 165b. Of the holes 165, the downstream through hole formed adjacent to the second downstream through hole 165b is referred to as a downstream through hole 165 or a third downstream through hole 165c. In other words, if the direction from one end 161c side of the second fin 161 toward the other end 161d side is the first direction Y, the first upstream through-hole 164a, the second upstream through-hole 164b, and the third The upstream through hole 164c is arranged along the first direction Y in the order of the first upstream through hole 164a, the second upstream through hole 164b, and the third upstream through hole 164c. Further, the first downstream through-hole 165a, the second downstream through-hole 165b, and the third downstream through-hole 165c are arranged along the first direction Y in the first downstream through-hole 165a and the second downstream through-hole 165b. The third downstream through-holes 165c are arranged in this order.

  The first upstream through hole 164a and the second upstream through hole 164b are formed to be separated by a first predetermined distance A as shown in FIG. Further, the second upstream through-hole 164b and the third upstream through-hole 164c are formed to be separated from each other by a first predetermined distance A. As described above, in the curved portion 161a of the second fin 161, the upstream side through holes 164 are formed to be separated from each other by the first predetermined distance A as shown in FIG.

  Further, the first downstream through-hole 165a and the second downstream through-hole 165b are formed to be separated by a first predetermined distance A as shown in FIG. Further, the second downstream side through-hole 165b and the third downstream side through-hole 165c are formed to be separated by a second predetermined distance B as shown in FIG. The second predetermined distance B is smaller than the first predetermined distance A. In other words, the first predetermined distance A is larger than the second predetermined distance B. As described above, in the curved portion 161a of the second fin 161, the downstream through holes 165 are formed to be separated from each other by the first predetermined distance A or the second predetermined distance B as shown in FIG. That is, in the curved portion 161a of the second fin 161, the second downstream through-hole 165b is formed at a position separated from the first downstream through-hole 165a by the first predetermined distance A, and the second downstream through-hole 165b to the second A third downstream through-hole 165c is formed at a position separated by a predetermined distance B, and a downstream through-hole 165 is formed at a position separated from the third downstream through-hole 165c by a first predetermined distance along the first direction Y. Has been. Thus, the downstream through-holes 165 are arranged along the first direction Y so that the first predetermined distance or the second predetermined distance alternate.

  Furthermore, the first upstream through-hole 164a and the first downstream through-hole 165a are formed so as to be separated by a second predetermined distance B as shown in FIG. The first downstream through hole 165a and the second upstream through hole 164b are formed to be separated by a first predetermined distance A as shown in FIG. The second upstream through-hole 164b and the second downstream through-hole 165b are formed to be separated by a second predetermined distance B as shown in FIG. The second downstream through hole 165b and the third upstream through hole 164c are formed to be separated by a first predetermined distance A as shown in FIG. The third upstream through hole 164c and the third downstream through hole 165c are formed so as to be separated by a second predetermined distance B as shown in FIG. As described above, in the curved portion 161a of the second fin 161, the upstream through hole 164 and the downstream through hole 165 are separated from each other by the first predetermined distance A or the second predetermined distance B as shown in FIG. It is formed in a staggered pattern.

  Further, in the straight portion 161b of the second fin 161, the upstream side through holes 164 are formed to be separated from each other by a first predetermined distance A as shown in FIG. Further, in the straight portion 161b of the second fin 161, the downstream side through holes 165 are formed to be separated from each other by a first predetermined distance A. Further, in the straight portion 161 b of the second fin 161, the upstream side through hole 164 and the downstream side through hole 165 are formed in a staggered manner so as to be separated by a second predetermined distance B.

  Note that the distance between the adjacent through holes 164 and 165 specifically refers to a distance connecting the centers of the adjacent through holes 164 and 165. Therefore, for example, “the first upstream side through hole 164a and the second upstream side through hole 164b are formed so as to be separated from each other by the first predetermined distance A” specifically, the first upstream side. It means that the distance connecting the centers of the side through hole 164a and the second upstream side through hole 164b is separated by the first predetermined distance A.

  The heat transfer tube 170 is a straight pipe, and the through holes 164 and 165 of the plurality of fins 161 are formed so as to be parallel to the longitudinal direction of the first heat exchange unit and the second heat exchange unit 160. It is inserted. For this reason, the plurality of heat transfer tubes 170 are arranged such that the distance between the pipe centers of the adjacent heat transfer tubes 170 is separated by one of the first predetermined distance and the second predetermined distance. Moreover, since the upstream through-hole 164 and the downstream through-hole 165 are formed in a staggered manner in the plurality of fins 161, the heat transfer pipe (corresponding to the upstream heat transfer pipe) 170 that passes through the upstream through-hole 164 and the downstream The heat transfer tubes (corresponding to the downstream heat transfer tubes) 170 inserted through the side through holes 165 are arranged in a staggered manner. Furthermore, a heat transfer tube 170 (hereinafter referred to as a first upstream heat transfer tube 170a) inserted through the first upstream through hole 164a and a heat transfer tube 170 (hereinafter referred to as a first downstream heat transfer tube) inserted through the first downstream through hole 165a. 170d) is spaced apart by a second predetermined distance. The first downstream heat transfer tube 170d and the heat transfer tube 170 (hereinafter referred to as the second upstream heat transfer tube 170b) inserted through the second upstream through-hole 164b are spaced apart by a first predetermined distance A. The second upstream heat transfer tube 170b and the heat transfer tube 170 (hereinafter referred to as the second downstream heat transfer tube 170e) inserted through the second downstream through-hole 165b are spaced apart by a second predetermined distance B. The second downstream heat transfer tube 170e and the heat transfer tube 170 (hereinafter referred to as the third upstream heat transfer tube 170c) inserted through the third upstream through-hole 164c are arranged apart from each other by a first predetermined distance A. The third upstream heat transfer pipe 170c and the heat transfer pipe 170 (hereinafter referred to as the third downstream heat transfer pipe 170f) inserted through the third downstream through-hole 165c are spaced apart by a second predetermined distance B. Further, the first upstream heat transfer tube 170a and the second upstream heat transfer tube 170b are arranged to be separated from each other by a first predetermined distance A. The second upstream heat transfer tube 170b and the third upstream heat transfer tube 170c are arranged apart from each other by a first predetermined distance A. In addition, the first downstream heat transfer tube 170d and the second downstream heat transfer tube 170e are arranged apart by a first predetermined distance A. The second downstream heat transfer tube 170e and the third downstream heat transfer tube 170f are arranged apart from each other by a second predetermined distance B.

  Further, both ends of the plurality of heat transfer tubes 170 are fixed by tube plates. For this reason, in the 1st heat exchange part and the 2nd heat exchange part 160, the tube sheet is arrange | positioned so that the several fin 161 may be pinched | interposed.

  The U-bend pipes 171 and 172 are substantially U-shaped piping components, and connect the end portions of the adjacent heat transfer tubes 170 at the end portions of the heat transfer tubes 170 protruding from the tube plate. Further, the U-bend pipes 171 and 172 are fitted and fixed to the end portions of the adjacent heat transfer pipes 170. Therefore, a plurality of heat transfer tubes 170 and a plurality of U bend tubes 171 and 172 are combined to form one refrigerant flow path.

  Further, the U-bend pipes 171 and 172 are connected to the first U-bend pipe 171 that connects the ends of the heat transfer pipes 170 that are arranged apart from each other by a first predetermined distance A, and from the first U-bend pipes 171 that are arranged at a second predetermined distance B apart. And a second U-bend pipe 172 that connects ends of the heat pipe 170.

  In the second heat exchange unit 160, the first U bend pipe 171 is disposed so as to protrude from one end side of the second heat exchange unit 160. Furthermore, in the second heat exchange unit 160, the second U bend pipe 172 is disposed so as to protrude from the other end side of the second heat exchange unit 160. Specifically, in the second heat exchange section 160, the first U-bend pipe 171 connects the ends of the heat transfer pipes 170 that are arranged apart by the first predetermined distance A as shown in FIG. . Further, in the second heat exchanging section 160, the second U bend pipe 172 connects the ends of the heat transfer pipes 170 that are arranged apart by the second predetermined distance B as shown in FIG.

  With this configuration, in this indoor heat exchanger, the heat transfer tubes 170 connected by the U-bend tubes 171 and 172 are separated from each other by either the first predetermined distance A or the second predetermined distance B. Will be placed. For this reason, in this indoor heat exchanger, the heat transfer tubes 170 can be connected to each other by the two types of U-bend tubes 171 and 172.

<Features>
In the above embodiment, in the curved portion 161a of the second fin 161, the first upstream through-hole 164a and the second upstream through-hole 164b are formed so as to be separated by a first predetermined distance A. Further, in the curved portion 161 a of the second fin 161, the second upstream through hole 164 b and the third upstream through hole 164 c are formed so as to be separated from each other by a first predetermined distance A. Thus, in the curved portion 161a of the second fin 161, the upstream side through holes 164 are formed so as to be separated from each other by the first predetermined distance A.

  Further, in the curved portion 161 a of the second fin 161, the first downstream through hole 165 a and the second downstream through hole 165 b are formed so as to be separated from each other by a first predetermined distance A. Further, in the curved portion 161 a of the second fin 161, the second downstream through hole 165 b and the third downstream through hole 165 c are formed so as to be separated by a second predetermined distance B. Thus, in the curved portion 161a of the second fin 161, the downstream through holes 165 are formed to be separated from each other by the first predetermined distance A or the second predetermined distance B. Therefore, the first upstream heat transfer tube 170a, which is a heat transfer tube inserted through the first upstream through hole 164a, and the second upstream heat transfer tube 170b, which is a heat transfer tube inserted through the second upstream through hole 164b, 1 Arranged so as to be separated by a predetermined distance A. The second upstream heat transfer tube 170b, which is a heat transfer tube inserted through the second upstream through hole 164b, and the third upstream heat transfer tube 170c, which is a heat transfer tube inserted through the third upstream through hole 164c, have a first predetermined distance. A apart from each other. Also, the first downstream heat transfer tube 170d, which is a heat transfer tube inserted through the first downstream through hole 165a, and the second downstream heat transfer tube 170e, which is a heat transfer tube inserted through the second downstream through hole 165b, are the first They are separated by a predetermined distance A. The second downstream heat transfer tube 170e, which is a heat transfer tube inserted through the second downstream through-hole 165b, and the third downstream heat transfer tube 170f, which is a heat transfer tube inserted through the third downstream through-hole 165c, have a second predetermined distance. B apart. Therefore, in the curved portion 161 a of the second fin 161, the heat transfer tube 170 inserted through the upstream through hole 164 and the heat transfer tube 170 inserted through the downstream through hole 165 can be arranged in the direction along the first direction Y. it can.

  Thereby, in the curved part 161a of the 2nd fin 161, each heat exchanger tube 170 can be made into the curved arrangement | positioning along the curved part 161a.

  Since this invention can implement | achieve low cost by making the kind of distance of the end parts of the heat exchanger tubes connected by an end connection pipe into two types, it is applied to the heat exchanger which exhibits a curved shape. Is effective.

270a Straight part (main heat transfer part)
270b Hairpin part 470 Piping parts (end connecting pipe)
60, 160, 460 Second heat exchange section (heat exchanger)
61,161,461 Second fin (fin)
61a, 161a curved portion 61c, 161c end (one end)
61d, 161d end (other end)
70, 170, 470 Heat transfer tube (main heat transfer section)
70a, 170a First upstream heat transfer tube (upstream main heat transfer section)
70b, 170b Second upstream heat transfer tube (upstream main heat transfer section)
70c, 170c Third upstream heat transfer tube (upstream main heat transfer section)
70d, 170d First downstream heat transfer tube (downstream main heat transfer section)
70e, 170e Second downstream heat transfer tube (downstream main heat transfer section)
70f, 170f Third downstream heat transfer tube (downstream main heat transfer section)
71,171 U-bend pipe / first U-bend pipe (end connection pipe)
72,172 U-bend pipe / second U-bend pipe (end connecting pipe)

Japanese Patent Laid-Open No. 9-42699

Claims (5)

A plurality of fins (61, 161, 461);
A plurality of main heat transfer sections (70, 170, 270a, 470) extending through the fins in a direction intersecting the air flow (F),
The fin has a curved curved portion (61a, 161a, 461a) and a straight straight portion (61b) in the penetration direction view of the main heat transfer portion,
The two main heat transfer parts arranged adjacent to each other are connected by end connecting pipes (71, 72, 171, 172, 471) for connecting the ends of the main heat transfer parts. Or connected by a hairpin part (270b) formed continuously from the main heat transfer part,
The main heat transfer parts connected by the end connecting pipe or the hairpin part are different from the first predetermined distance (A) or the first predetermined distance in the curved part and the straight part . It is arranged to be separated by one of the distances (B) ,
The main heat transfer section includes a plurality of upstream main heat transfer sections (70a, 70b, 70c, 170a, 170b, 170c), and a plurality of air flow downstream of the upstream main heat transfer section. A downstream main heat transfer section (70d, 70e, 70f, 170d, 170e, 170f),
The upstream main heat transfer section and the downstream main heat transfer section are arranged in a staggered manner,
The upstream main heat transfer section includes a first upstream main heat transfer section (70a, 170a) and a second upstream main heat transfer section (adjacent to the first upstream main heat transfer section ( 70b, 170b)
The downstream main heat transfer portion includes a first downstream main heat transfer portion (70d, 170d) adjacent to the first upstream main heat transfer portion and the second upstream main heat transfer portion in the curved portion. Including
When the first downstream main heat transfer section and the first upstream main heat transfer section are arranged to be separated by the first predetermined distance, the first downstream main heat transfer section and the first 2 is arranged away from the upstream main heat transfer portion by the second predetermined distance,
Heat exchanger (60, 160, 460). A plurality of fins (61, 161, 461);
A plurality of main heat transfer sections (70, 170, 270a, 470) extending through the fins in a direction intersecting the air flow (F),
The fin has a curved curved portion (61a, 161a, 461a) and a straight straight portion (61b) in the penetration direction view of the main heat transfer portion,
The main heat transfer parts are separated from each other by either the first predetermined distance (A) or the second predetermined distance (B) different from the first predetermined distance in the curved part and the straight part . are arranged to,
The main heat transfer section includes a plurality of upstream main heat transfer sections (70a, 70b, 70c, 170a, 170b, 170c), and a plurality of air flow downstream of the upstream main heat transfer section. A downstream main heat transfer section (70d, 70e, 70f, 170d, 170e, 170f),
The upstream main heat transfer section and the downstream main heat transfer section are arranged in a staggered manner,
The upstream main heat transfer section includes a first upstream main heat transfer section (70a, 170a) and a second upstream main heat transfer section (adjacent to the first upstream main heat transfer section ( 70b, 170b)
The downstream main heat transfer portion includes a first downstream main heat transfer portion (70d, 170d) adjacent to the first upstream main heat transfer portion and the second upstream main heat transfer portion in the curved portion. Including
When the first downstream main heat transfer section and the first upstream main heat transfer section are arranged to be separated by the first predetermined distance, the first downstream main heat transfer section and the first 2 is arranged away from the upstream main heat transfer portion by the second predetermined distance,
Heat exchanger (60, 160, 460). The upstream main heat transfer portion is a third upstream main heat transfer portion (70c, 170c) in the curved portion, separately from the first upstream main heat transfer portion and the second upstream main heat transfer portion. Further including
The downstream main heat transfer section includes a second downstream main heat transfer section (70e, 170e) and a third downstream main heat transfer section (in addition to the first downstream main heat transfer section, in the bending section). 70f, 170f),
The upstream main heat transfer section is arranged along the first direction (Y) which is a direction from one end (61c, 161c) side of the fin to the other end (61d, 161d) side. Arranged in the order of the heat section, the second upstream main heat transfer section, the third upstream main heat transfer section,
The first downstream main heat transfer section is arranged along the first direction in the order of the first downstream main heat transfer section, the second downstream main heat transfer section, and the third downstream main heat transfer section. Has been
The upstream main heat transfer section and the downstream main heat transfer section are:
When the first upstream main heat transfer section and the first downstream main heat transfer section are arranged to be separated by the first predetermined distance, the first downstream main heat transfer section and the first 2 upstream main heat transfer portions are arranged so as to be separated by the second predetermined distance, and the second upstream main heat transfer portion and the second downstream main heat transfer portion are separated by the first predetermined distance. Arranged so that the second downstream main heat transfer section and the third upstream main heat transfer section are separated from each other by the second predetermined distance, and the third upstream main heat transfer section and the third The downstream main heat transfer section is disposed so as to be separated from the first predetermined distance,
The heat exchanger according to claim 1 or 2 . The first predetermined distance is greater than the second predetermined distance,
In the upstream main heat transfer section,
The first upstream main heat transfer section and the second upstream main heat transfer section are arranged apart from each other by the first predetermined distance,
The second upstream main heat transfer section and the third upstream main heat transfer section are arranged apart from each other by the first predetermined distance,
In the downstream main heat transfer section,
The first downstream main heat transfer section and the second downstream main heat transfer section are arranged apart from each other by the second predetermined distance,
The second downstream main heat transfer section and the third downstream main heat transfer section are arranged apart from each other by the second predetermined distance.
The heat exchanger according to claim 3 . The first predetermined distance is greater than the second predetermined distance,
In the upstream main heat transfer section,
The first upstream main heat transfer section and the second upstream main heat transfer section are arranged apart from each other by the first predetermined distance,
The second upstream main heat transfer section and the third upstream main heat transfer section are arranged apart from each other by the first predetermined distance,
In the downstream main heat transfer section,
When the first downstream main heat transfer section and the second downstream main heat transfer section are arranged apart from each other by the first predetermined distance, the second downstream main heat transfer section and the third downstream The downstream main heat transfer section is disposed away from the second predetermined distance,
The heat exchanger according to claim 3 .

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