JP6195197B2 - Finned heat exchanger - Google Patents

Description

  The present invention relates to a finned heat exchanger mounted on an indoor unit of an air conditioner.

  2. In general, in an indoor unit of an air conditioner, as shown in FIG. 2, a casing 101 includes one or more suction ports such as a front suction port 102a and an upper suction port 102b, and a plurality of outlets divided on a lower surface. One or more outlets such as 103 are provided. In this casing 101, a once-through fan 105 and finned heat exchangers 104A, 104B, 104C, 104D are accommodated (for example, see Patent Document 1).

  In the conventional air conditioner configured as described above, the finned heat exchanger 104 is arranged on the front side in the casing 101. The finned heat exchanger 104 includes two front side heat exchangers 104A and 104A that are bent near the center in the vertical direction, a back side heat exchanger 104B that is disposed on the back side in the casing 101, The auxiliary heat exchangers 104C and 104D are attached to the front surfaces of the front-side heat exchangers 104A and 104A divided into two. The front side heat exchanger 104A and the back side heat exchanger 104B are arranged in a form surrounding the once-through fan 105 from the windward side. As described above, the conventional air conditioner is configured such that the finned heat exchangers 104A, 104B, 104C, and 104D are accommodated in a limited space in the casing 101 as much as possible.

  The auxiliary heat exchangers 104C and 104D attached to the front surface of the front side heat exchanger 104A are provided to improve the heat exchange capability, and are the main heat exchangers. 104A and the back side heat exchanger 104B are manufactured in separate steps, and are additionally connected and attached to the main front side heat exchanger 104A and the back side heat exchanger 104B. In the heat exchanger shown in FIG. 2, the case where it is additionally connected to the main front surface side heat exchanger 104A is shown.

  In addition, in the vicinity of the bent portion of the front side heat exchangers 104A and 104A divided into two upper and lower sides, if one front side heat exchanger 104A is simply formed by bending and there is a space where no fins exist, There is a risk that an air flow that hardly exchanges heat in the space passes through the heat exchanger. In this way, in order to suppress the generation of an air flow that does not undergo heat exchange in the air flow that has passed through the front side heat exchanger 104A, the spacer 106 is disposed at the bent portion of the front side heat exchanger 104A shown in FIG. It is installed.

  On the other hand, as a structure that eliminates the need to bend the front side heat exchanger 104A and prevents the airflow from passing through the heat exchanger without exchanging heat without providing the spacer 106, for example, Patent Document 1 discloses a configuration in which a front-side heat exchanger is formed in an arc shape.

  In this patent document 1, as shown in FIG. 3, the indoor unit of an air conditioner in which the shape of the fin 201A of the front side heat exchanger 201 is formed in an arc shape so as to surround a part of the peripheral surface of the once-through fan 203. Is disclosed.

  According to the configuration shown in FIG. 3, the spacer 106 shown in FIG. 2 is not necessary, and no waste material is generated in a portion corresponding to the spacer 106 in the material of the fin 201A at the time of manufacture. There are advantages that can be reduced. In the configuration shown in FIG. 3, since the spacer 106 is not provided, the area of the fin 201A is increased by an area corresponding to the location where the spacer 106 is provided, and the heat exchange capability is improved. .

  Furthermore, in the heat exchanger described in Patent Document 1, by arranging the heat transfer tubes having an outer diameter of 4.0 to 7.0 mm in the back side heat exchanger 202 in three rows along the gas main flow direction, The heat exchange capacity is improved.

  However, in the heat exchanger having such a configuration, the ventilation resistance at the places where the heat transfer tubes are arranged in three rows increases, and the wind speed distribution of the heat exchanger becomes non-uniform, which may lead to a decrease in performance. Further, in the configuration of the conventional heat exchanger shown in FIG. 3, the generation of singular noise proportional to the product of the number of blades of the blower and the number of rotations in use is caused by the non-uniform wind speed distribution in the vicinity of the once-through blower. There is a risk of generating loud noise.

  In order to cope with this type of problem, like the heat exchanger described in Patent Document 2, it is formed by cutting and raising a part of the fin so as to block the wind in the fin disposed in the vicinity of the once-through fan. A configuration in which a slit is provided has been proposed. In addition, in order to suppress the nonuniformity of the wind speed distribution in the heat exchanger, a configuration has been proposed in which the number of slits in the area where the air volume in the fin is increased is larger than the area where the air volume is reduced.

  Further, Patent Document 3 discloses a configuration in which a cut-and-raised portion is formed in a region where the wind speed increases and the shape of the cut-and-raised surface is inclined with respect to the main flow of gas flowing into the fin. The raised parts disclosed in Patent Document 3 are arranged in a plurality of rows in the fins to achieve uniform wind speed distribution. FIG. 4 is a cross-sectional view showing a configuration of a conventional heat exchanger disclosed in Patent Document 3, and FIGS. 5 and 6 are views showing a cut-and-raised portion 322 disclosed in Patent Document 3. FIG. 5 and 6, (a) is a perspective view showing the cut-and-raised portion 322, and (b) is a cross-sectional view showing two fins stacked.

JP 2007-101111 A JP 2006-234184 A JP 2010-019500 A

  However, the configuration of the conventional heat exchanger has a problem that depending on the shape of the heat exchanger, the wind speed distribution cannot be adjusted and the singular sound cannot be completely erased. Furthermore, in the case where a cut and raised portion is provided so as to have an inclination with respect to the main flow of the gas that flows into the fin and the wind that cuts off the wind, the air heat transfer coefficient at the corresponding location is lowered and the heat exchange capacity is lowered. It had the problem of end.

  The present invention has been made in view of the above-described problems of the prior art. Even when the wind speed distribution is large and non-uniform, the wind speed distribution can be made substantially uniform and has good heat exchange performance. And it aims at providing the heat exchanger with a fin which can suppress generation | occurrence | production of the peculiar sound resulting from rotation of an air blower.

In order to achieve the above object, a finned heat exchanger according to the present invention comprises:
A heat transfer tube in which the refrigerant flows;
A plurality of fins having a plurality of first fin collars that are stacked so as to allow gas to pass therethrough and into which the heat transfer tubes are inserted and second fin collars that are not inserted with the heat transfer tubes ;
In the fins, the plurality of first fin collars are arranged in a plurality of rows along a direction substantially orthogonal to the gas flow direction,
The second fin collar is the first fin collar excluding the first fin collar row closest to the leeward leading edge of the fin and the first fin collar row closest to the leeward trailing edge of the fin. Arranged in a row of fin collars .

  The finned heat exchanger according to the present invention configured as described above can achieve uniform wind speed distribution even when the wind speed distribution is large and non-uniform, and has good heat exchange performance. It is possible to suppress the generation of abnormal noise due to the rotation of the blower. In general, since a heat exchanger is close to a once-through fan, the wind speed passing between the stacked fins is large, and in the stacked fins, the arrangement of the heat transfer tubes is sparse, so the wind speed passing between the fins is large. Become. However, in the heat exchanger with fins according to the present invention, by providing the second fin collar into which the heat transfer tubes are not inserted, the speed of the air passing through the fins of the heat exchanger is reduced, and the wind speed distribution of the heat exchanger Can be made uniform.

  According to the present invention, the air speed distribution of the heat exchanger is made uniform, exhibits good heat exchange performance, suppresses the generation of abnormal noise due to the rotation of the blower, and improves the heat exchange performance. It is possible to provide a finned heat exchanger capable of

The longitudinal cross-sectional view of the indoor unit in the air conditioner by which the heat exchanger with a fin of Embodiment 1 which concerns on this invention was mounted Sectional view of an indoor unit of an air conditioner equipped with a conventional finned heat exchanger Cross-sectional view of an indoor unit of an air conditioner equipped with another conventional finned heat exchanger Sectional view of an indoor unit of an air conditioner equipped with another conventional finned heat exchanger (A) Perspective view showing cut and raised fins of heat exchanger in FIG. 4, (b) Cross section of cut and raised in FIG. 5 (a) (A) Perspective view showing another cut and raised of the fin of the heat exchanger of FIG. 4, (b) Cross section of the cut and raised of FIG. 6 (a)

The finned heat exchanger according to the first aspect of the present invention includes a heat transfer tube in which a refrigerant flows,
A plurality of fins having a plurality of first fin collars stacked such that gas passes therethrough and into which the heat transfer tubes are inserted;
In the fin, the plurality of first fin collars are arranged in a plurality of rows along a direction substantially orthogonal to the gas flow direction, and the heat transfer tubes are disposed in the rows of the first fin collars. A second fin collar that is not inserted is provided.

  In the finned heat exchanger according to the first aspect of the present invention configured as described above, there is no region where the arrangement of the heat transfer tubes is sparse in the stacked fins, and as a result, the air wind speed is larger in the region. It becomes possible to make the wind speed of the whole heat exchanger substantially uniform. Moreover, in the heat exchanger with fins of the first aspect, it is possible to suppress the generation of singular sounds due to the rotation of the blower and to maximize the capability of the heat exchanger.

In the finned heat exchanger according to the second aspect of the present invention, the diameter of the second fin collar in the first aspect is the same as the diameter of the first fin collar, or the diameter of the first fin collar is the same. You may form smaller than a diameter.
In the finned heat exchanger according to the second aspect of the present invention configured as described above, it is possible to configure the fin collar that can be provided on the stacked fins in a desired configuration and a desired shape, It becomes possible to set the wind speed of the air passing through the region to a desired speed, and the wind speed of the entire heat exchanger can be made substantially uniform.

In the heat exchanger with fins of the third aspect according to the present invention, the second fin collar in the first aspect or the second aspect is disposed in a region surrounded by the first fin collar. You may comprise.
The heat exchanger with fins of the third aspect according to the present invention configured as described above can exhibit the maximum heat exchange capability with the heat transfer tubes in the laminated fins.

In the heat exchanger with fins of the fourth aspect according to the present invention, the plurality of first fin collars in any one of the first to third aspects is substantially in the gas flow direction. You may comprise so that the said 2nd fin color may not be provided continuously in the row | line | column arrange | positioned along with the orthogonal direction.
The heat exchanger with fins of the fourth aspect according to the present invention configured as described above can maximize the heat exchange capability with the heat transfer tubes in the laminated fins.

In the heat exchanger with fins of the fifth aspect according to the present invention, the plurality of first fin collars in any one of the first to fourth aspects is substantially in the gas flow direction. In the plurality of rows arranged side by side along the orthogonal direction, the second fin collar may not be provided in the windward leading edge side row and the leeward trailing edge side row of the fin.
The finned heat exchanger according to the fifth aspect of the present invention configured as described above can make the air velocity distribution of the heat exchanger uniform while enhancing the heat exchange capability.

In the air conditioner of the sixth aspect according to the present invention, a casing having a gas inlet and an outlet,
A heat exchanger housed in the casing and performing heat exchange between the gas flowing in from the suction port and the refrigerant flowing through the heat transfer tube;
A recirculation blower that is housed in the casing and blows gas to the heat exchanger, and is disposed on the leeward side of the heat exchanger with respect to the flow direction of the gas,
The heat exchanger is configured with the finned heat exchanger according to any one of the first to fifth aspects, and the stacked fins are bent so as to surround the reflux fan. A bend is formed,
The second fin collar is provided at the bent portion of the heat exchanger.

  In the air conditioner according to the sixth aspect of the present invention configured as described above, there is no region where the arrangement of the heat transfer tubes is sparse in the stacked fins, and as a result, the air wind speed is large depending on the region. Is suppressed, and the wind speed of the entire heat exchanger can be made substantially uniform. Moreover, in the air conditioner of the sixth aspect, it is possible to suppress the generation of singular noise due to the rotation of the blower and to maximize the heat exchange capability.

In the heat exchanger with fins of the seventh aspect according to the present invention, the second fin collar in the sixth aspect is further provided in the heat exchanger vertically above the reflux fan. Also good.
In the air conditioner according to the seventh aspect of the present invention configured as described above, the air velocity distribution of the heat exchanger can be made uniform, and the heat exchanger capacity can be maximized. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a finned heat exchanger according to the present invention will be described with reference to the accompanying drawings. Note that the finned heat exchanger of the present invention is not limited to the configuration of the heat exchanger described in the following embodiment, but is equivalent to the technical idea described in the following embodiment. The heat exchanger comprised based on is included.

(Embodiment 1)
First, an indoor unit in an air conditioner equipped with the finned heat exchanger of Embodiment 1 will be described with reference to FIG. FIG. 1 is a longitudinal sectional view of an indoor unit on which the finned heat exchanger according to the first embodiment is mounted.

  As shown in FIG. 1, the casing 2 of the indoor unit 1 of the air conditioner is provided with suction ports 3 a and 3 b on the front surface and the upper surface, and an outlet port 4 on the lower surface. In FIG. 1, in the gas in which the gas is sucked into the casing 2, the schematic flow direction is indicated by an arrow. Inside the casing 2, a once-through fan 5 and a heat exchanger 10 with fins are accommodated.

  The finned heat exchanger 10 is arranged on the front side in the casing 2 and is arranged on the back side in the casing 2 and the front side heat exchanger 20 formed in a convex shape so as to protrude to the front side. It is comprised from the back side heat exchanger 40. Moreover, the front side heat exchanger 20 and the back side heat exchanger 40 are arrange | positioned so that the cross-flow fan 5 may be surrounded from an upwind side, as shown in FIG.

  Further, in the front-side heat exchanger 20 in the first embodiment, a plurality of strip-like fins 21 are stacked in parallel with a predetermined interval, and substantially parallel to the main flow direction of the gas flowing in the casing 2. Has been placed. For this reason, the stacked fins 21 are configured such that the gas flows excessively through a gap space at a predetermined interval between the fins. Further, in the front side heat exchanger 20, a plurality of fins 21 arranged in parallel with a predetermined interval, and a heat transfer tube 50 fixed so as to conduct heat through the plurality of fins 21, It is comprised. The heat transfer tube 50 is configured so that a refrigerant that is a heat conducting member flows.

  As shown in FIG. 1, the front-side heat exchanger 20 has a first area A in the vicinity of the blower having a curved portion that is curved so as to protrude with respect to the gas inflow direction, that is, the lower side in the first embodiment. The side region A has a straight portion and is roughly divided into two regions, ie, a second region B that is separated from the cross-flow blower 5 forward and upward, that is, an upper region B in the first embodiment. In the front side heat exchanger 20, the first area A on the side close to the once-through fan 5, that is, the lower area A between the windward leading edge 20a and the leeward trailing edge 20b of the fin 21 in the curved portion, A first heat transfer tube 50 (50a) penetrating the plurality of fins 21 is disposed so as to be substantially orthogonal to the gas main flow direction. Further, in the front side heat exchanger 20, the second region B far from the once-through fan 5, that is, the upper region B of the straight portion between the windward leading edge 20 a and the leeward trailing edge 20 b of the fin 21 The second heat transfer tubes 50 (50b) penetrating the plurality of fins 21 are disposed so as to be substantially orthogonal to the main gas flow direction.

  Similarly, also in the back surface side heat exchanger 40, a plurality of strip-shaped fins 21 are laminated in parallel with a predetermined interval, and are arranged substantially parallel to the main flow direction of the gas flowing in the casing 2. . As a result, the back side heat exchanger 40 is also configured such that the gas flows excessively in the gap space with a predetermined interval between the fins. The rear heat exchanger 40 is also provided with a third heat transfer tube 50 (50c) fixed so as to penetrate the plurality of fins 21 and conduct heat.

  In addition, the 1st heat exchanger tube 50a and the 2nd heat exchanger tube 50b in the front side heat exchanger 20 and the 3rd heat exchanger tube 50c in the back side heat exchanger 40 are formed linearly, and each edge part is formed. A meandering refrigerant passage is formed by being connected by a U-shaped tube (not shown) bent into a hairpin shape.

  The heat transfer tube 50 mounted so as to penetrate the lower region A in the front heat exchanger 20 has one or more rows arranged in a direction substantially perpendicular to the main flow direction of gas. They are arranged in three rows. In the upper region B far from the once-through fan 5 in the front-side heat exchanger 20 and the rear-side heat exchanger 40, the heat transfer tubes 50 are arranged side by side in a direction substantially orthogonal to the main flow direction of gas. The provided rows are arranged in two to four rows.

  In the heat exchanger 10 with fins of the first embodiment, the diameter of the heat transfer tube 50 that is mounted so as to penetrate the fins 21 is composed of two or more types. For example, the diameter of the heat transfer tube 50 inserted into the first region A on the side close to the once-through fan 5 of the front-side heat exchanger 20, that is, the lower region A of the front-side heat exchanger 20, is the front-side heat exchanger. 20 is set to be larger than the diameter of the heat transfer tube 50 inserted into the second region B far from the once-through fan 5, that is, the upper region B of the front-side heat exchanger 20. Further, the diameter of the heat transfer tube 50 inserted into the lower region A of the front side heat exchanger 20 is set larger than the diameter of the heat transfer tube 50 inserted into the back side heat exchanger 40.

  Also in the heat transfer tube 50 inserted in the upper region B of the front side heat exchanger 20, the diameter of the heat transfer tube 50 on the windward leading edge side is set larger than the diameter of the heat transfer tube 50 on the leeward trailing edge side. Also, in the heat transfer tube 50 inserted into the back side heat exchanger 40, the diameter of the heat transfer tube 50 on the leeward side near the suction port 3b is set larger than the diameter of the heat transfer tube 50 on the leeward side near the once-through fan. Yes.

  In the heat exchanger 10 with fins according to the first embodiment, the heat transfer tubes 50 constituting the refrigerant passages meandering in a hairpin shape are even for the fins 21 in the front-side heat exchanger 20 and the rear-side heat exchanger 40. It is fixed so as to be able to transfer heat through the part.

  During the operation of the air conditioner using the finned heat exchanger 10 of the first embodiment configured as described above, the air sucked from the front suction port 3a or the upper suction port 3b is exchanged by the front side. It passes through the heat exchanger 20 or the back side heat exchanger 40, passes through the once-through fan 5, and is blown out from the outlet 4.

  In the heat exchanger 10 with fins of the first embodiment, the heat transfer tubes 50 that constitute the refrigerant passages meandering in a hairpin shape are provided on the fins 21 in the lower region A adjacent to the cross-flow fan 5 in the front-side heat exchanger 20. An even number of first fin collars 23 to be inserted are provided. In addition, on the lower side (bent portion) of the fin 21, separately from the first fin collar 23 in which the heat transfer tube 50 is inserted in the region C surrounded by the first fin collar 23 in which the heat transfer tube 50 is inserted, A second fin collar 24 into which the heat transfer tube 50 is not inserted is provided. The second fin collar 24 into which the heat transfer tube 50 is not inserted has a diameter smaller than the diameter of the first fin collar 23 into which the heat transfer tube 50 is inserted, and has the same shape as the first fin collar 23. Has been.

  In the row in which the plurality of first fin collars 23 are arranged side by side along a direction substantially orthogonal to the gas flow direction, the second fin collars 24 are not continuously provided, It is provided between the fin collars 23.

  The plurality of first fin collars 23 are arranged in a plurality of rows side by side along a direction substantially orthogonal to the gas flow direction, and the second fin collar 24 is located at the most upwind front edge 20 a of the fin 21. It is not provided in the row at the closest position and the row at the position closest to the leeward trailing edge 20b. The second fin collar 24 is disposed so as to be surrounded by the plurality of first fin collars 23.

  In the finned heat exchanger 10 of the first embodiment, the second fin collar 24 into which the heat transfer tube 50 is not inserted is provided in the lower region A adjacent to the cross-flow fan 5 in the front-side heat exchanger 20. However, the present invention is not limited to such a configuration. For example, the second fin collar 24 may be provided vertically above the cross-flow fan 5 in the rear heat exchanger 40, and the second fin collar 24 may be provided. 24 is arranged at a desired position in consideration of the heat transfer effect and ventilation resistance. As described above, even when the second fin collar 24 is provided in the back surface side heat exchanger 40, the second fin collar 24 is disposed in a region surrounded by the fin collar into which the heat transfer tube 50 is inserted. In the rear heat exchanger 40 as well, in the row in which the fin collars into which the heat transfer tubes 50 are inserted are arranged along the direction substantially perpendicular to the gas flow direction, the second fin collars 24 are It is the structure which is not provided continuously.

  In addition, in the fin 21 of the upper area | region B which is an area | region away from the once-through fan 5 in the front side heat exchanger 20, and the fin 21 of the back side heat exchanger 40, the fin collar by which the heat exchanger tube 50 with a large diameter is inserted. Is arranged on the front edge side which is the suction port side, and a fin collar into which the heat transfer tube 50 having a small diameter is inserted is provided on the rear edge side which is the cross-flow fan side.

  In Embodiment 1, although it is the structure which provided only the 2nd fin collar 24 in which the heat exchanger tube 50 is not inserted in the fin 21, this invention is not limited to such a structure, The heat exchanger 10 with a fin An appropriate number is provided in consideration of the specification, configuration, shape, efficiency, and the like.

  In the finned heat exchanger 10 of the first embodiment configured as described above, the mounting location of the heat transfer tube 50 and the first fin collar 23 in the lower region A of the front side heat exchanger 20 is a gas. It is arranged in one or three places along the main flow direction (direction toward the once-through fan). Further, the upper region B of the front side heat exchanger 20 and the mounting locations of the heat transfer tubes 50 and the first fin collars 23 of the rear side heat exchanger 40 are 2 along the main flow direction of gas (the direction toward the cross-flow fan). It is arranged side by side or 4 places. In the finned heat exchanger 1 configured as described above, the plurality of first heat transfer tubes 50 are inserted in the lower region A of the front heat exchanger 20 that is close to the once-through fan 5 and tends to increase the wind speed. A second fin collar 24 into which the heat transfer tube 50 is not inserted is provided in a region C surrounded by the fin collar 23. In this way, the second fin collar 24 having a diameter smaller than the diameter of the first fin collar 23 into which the heat transfer tube 50 is inserted is close to the once-through fan 5, and the lower region A of the front heat exchanger 20 where the wind speed tends to increase. By providing in (area | region C), a cylindrical part is formed between the fins 21 arranged in parallel (stacked) with a predetermined space | interval, and this cylindrical part becomes appropriate resistance of ventilation. Thus, by providing the 2nd fin collar 24 in the area | region C, it becomes a structure which can suppress that a wind speed becomes quick in the lower side area | region A of the front side heat exchanger 20. FIG. As a result, in the heat exchanger 10 with fins of the first embodiment, the wind speed distribution can be made uniform, and the ability as a heat exchanger can be maximized, and the non-uniform wind speed distribution. It is possible to suppress the generation of singular sounds due to the noise.

  In the finned heat exchanger 10 of the first embodiment, the diameter of the second fin collar 24 into which the heat transfer tube 50 is not inserted is set to the first heat transfer tube 50 arranged around the second fin collar 24. It is formed smaller than the diameter of the fin collar 23. However, the diameter of the second fin collar 24 is that of the fin collar (third fin collar 25) having a small diameter provided in the upper region B of the front side heat exchanger 20 and the heat transfer tube 50 in the rear side heat exchanger 40. The diameter that is not inserted is the same as the diameter of the small fin collar (third fin collar 25). Therefore, the processing tool of the second fin collar 24 in which the heat transfer tube 50 is not inserted is the same as the third fin collar 25 having the same diameter in the fin collar into which the heat transfer tube 50 is inserted, for example, during maintenance of the fin press mold. A processing tool can be used. For this reason, it is easy to handle maintenance, and there are advantages in terms of reduction in time and cost required for maintenance.

  In the finned heat exchanger 10 according to the first embodiment, the case where the diameter of the second fin collar 24 into which the heat transfer tube 50 is not inserted is smaller than the diameter of the first fin collar 23 into which the heat transfer tube 50 is inserted will be described. However, the present invention is not limited to such a configuration, and the diameter of the second fin collar 24 may be the same as the diameter of the first fin collar 23 in consideration of the heat transfer effect and the ventilation resistance. The desired diameter is determined.

In the heat exchanger with fins and the air conditioner of the present invention, the heat transfer tubes provided in at least one of the front-side heat exchanger and the rear-side heat exchanger have two or more types of diameters. The number of the first fin collars to be inserted is an even number for each diameter of the heat transfer tubes into which the heat transfer tubes are inserted. Further, in the heat transfer tube, in a region surrounded by the first fin collar in which the heat transfer tube other than the minimum diameter is inserted, the second fin in which the heat transfer tube is not inserted separately from the first fin collar in which the heat transfer tube is inserted. The color is arranged. As described above, by arranging the second fin collar in the region surrounded by the first fin collar where the heat transfer tube is inserted, the heat exchanger has an appropriate resistance to air blowing, and the wind speed of the finned heat exchanger is increased. The distribution can be made substantially uniform and the heat exchange performance can be improved.
As described above, in the present invention, it is possible to provide a heat exchanger and an air conditioner that achieves uniform wind speed distribution of a finned heat exchanger and improves heat exchange performance.

  Although the present invention has been described in the above embodiment with a certain degree of detail, the disclosure content of the above embodiment should be changed in the details of the configuration, and the combination and order of the elements in this embodiment Changes may be made without departing from the scope and spirit of the claimed invention.

  The finned heat exchanger of the present invention suppresses the generation of noise due to the rotation of the blower by realizing uniform wind speed, and has good heat exchange performance, so that it is small in size as well as air conditioning equipment. It can be applied to applications such as heat exchange units such as air cleaners, dehumidifiers, and washer / dryers that employ a heat pump drying method.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Casing 3a, 3b Inlet 4 Outlet 5 Cross-flow fan 10 Heat exchanger with fin 20 Front side heat exchanger 20a Upwind front edge 20b Downwind trailing edge 21 Fin 23 1st fin collar 24 2nd fin collar 25 3rd fin collar 40 Back side heat exchanger 50 Heat transfer tube

Claims (6)

A heat transfer tube in which the refrigerant flows;
A plurality of fins having a plurality of cylindrical first fin collars stacked such that gas passes therethrough and into which the heat transfer tubes are inserted, and a cylindrical second fin collar into which the heat transfer tubes are not inserted , and
In the fins, the plurality of first fin collars are arranged in a plurality of rows along a direction substantially orthogonal to the gas flow direction,
The second fin collar is the first fin collar excluding the first fin collar row closest to the leeward leading edge of the fin and the first fin collar row closest to the leeward trailing edge of the fin. A finned heat exchanger arranged in a row of fin collars .   2. The finned heat exchanger according to claim 1, wherein a diameter of the second fin collar is the same as a diameter of the first fin collar or smaller than a diameter of the first fin collar.   The heat exchanger with fins according to claim 1, wherein the second fin collar is disposed in a region surrounded by the first fin collar.   2. The structure in which the second fin collars are not continuously provided in a row in which the plurality of first fin collars are arranged side by side along a direction substantially orthogonal to the gas flow direction. The heat exchanger with a fin as described in any one of thru | or 3. A casing having a gas inlet and outlet;
A heat exchanger housed in the casing and performing heat exchange between the gas flowing in from the suction port and the refrigerant flowing through the heat transfer tube;
An air conditioner that is housed in the casing and blows gas to the heat exchanger, and is provided with a reflux fan disposed on the leeward side of the heat exchanger in the gas flow direction. Because
The heat exchanger is configured by the heat exchanger with fins according to any one of claims 1 to 4 , and a bent portion formed so as to surround the reflux fan is formed in the stacked fins. And
The air conditioner in which the second fin collar is provided at the bent portion of the heat exchanger. The air conditioner according to claim 5 , wherein the second fin collar is further provided in the heat exchanger vertically above the reflux fan.

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