JP6413376B2 - Finned tube heat exchanger and method for manufacturing the same - Google Patents

Description

  The present invention relates to a finned tube heat exchanger used as a heat exchanger such as an air conditioner, a refrigerator, or a water heater, and a method for manufacturing the same.

  Conventionally, it is known to use a fin tube type heat exchanger in, for example, an air conditioner, a refrigerator, or a water heater. A finned tube heat exchanger is generally composed of a plurality of fins stacked in a certain direction at regular intervals, and a heat transfer tube passing through the plurality of fins. A fin tube heat exchanger is known in which the shape of the fin is devised for the purpose of improving heat transfer performance. In this regard, for example, Patent Document 1 discloses an invention related to the structure and arrangement of a plurality of front row fins arranged on the windward side in the direction in which wind is supplied and a plurality of rear row fins arranged on the leeward side. Yes. Each of the fins is a corrugated fin having the same wave shape that alternately repeats the first slope portion and the second slope portion, exhibiting a striped pattern inclined with respect to the direction in which the wind is supplied. The first inclined surface portions in each of the plurality of rear row fins are arranged so as to partially overlap with the first inclined surface portions in each of the plurality of front row fins in an inclination direction parallel to the stripe pattern. Is done. In Patent Document 1, heat transfer performance is improved by such a structure and arrangement.

JP 2013-50270 A

  However, in the heat exchanger of Patent Document 1, since the front row fins and the rear row fins each have a striped pattern in which the first and second slope portions are alternately arranged, wave-shaped fins that alternately repeat the first slope portion and the second slope portion are used. In the manufacturing process, a part thereof must be locally processed and deformed. As a result, the manufacturing becomes complicated and the mass productivity is poor. The present invention has been made to solve the above problems, and provides a finned tube heat exchanger capable of improving heat exchange performance while maintaining ease of manufacture. There is.

The finned tube heat exchanger according to the present invention includes a plurality of fins arranged at intervals in the x-axis direction and a plurality of fins arranged in the y-axis direction that penetrates the plurality of fins and is orthogonal to the x-axis direction. A plurality of heat transfer portions, the plurality of heat transfer portions being orthogonal to the x-axis direction and the y-axis direction, arranged in the z-axis direction through which air flows , and the plurality of heat transfer portions a plurality of fins that make up is curved in the direction of the x-axis as a whole, that are arranged in a staggered manner when the plurality of heat transfer tubes composing a plurality of heat transfer portion as viewed from the direction of the z-axis The plurality of fins constituting the plurality of heat transfer portions have portions that do not coincide with each other in the x-axis direction and the y-axis direction .

  According to the finned tube heat exchanger of the present invention, it is possible to improve heat exchange performance while maintaining ease of manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS (a) is a perspective view of the outdoor unit of the air conditioning apparatus which has a finned-tube heat exchanger which concerns on Embodiment 1 of this invention, (b) is the front panel of the outdoor unit which is shown to (a), and the left side It is a perspective view of the state which removed the panel, the right side panel air blower, the fan guard, etc. It is a perspective view which shows the fin tube type heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the principal part of the fin tube type heat exchanger which concerns on Embodiment 1 of this invention. It is a top view which shows the principal part of the fin tube type heat exchanger before curving a fin. It is a top view which shows the principal part of the fin tube type heat exchanger after making a fin curve. It is a top view which shows one fin of the fin tube type heat exchanger which concerns on Embodiment 1 of this invention. It is a front view which shows the principal part of the fin tube type heat exchanger which concerns on Embodiment 1 of this invention. It is a top view which shows the principal part of the fin tube type heat exchanger which concerns on Embodiment 1 of this invention. It is sectional drawing of the direction perpendicular | vertical to the X-axis axis | shaft which shows the principal part of the finned-tube type heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the principal part of the fin tube type heat exchanger which concerns on Embodiment 2 of this invention. It is a top view which shows the principal part of the fin tube type heat exchanger which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
FIG. 1: is a perspective view of the outdoor unit 200 of the air conditioning apparatus which has the finned tube type heat exchanger 100 which concerns on Embodiment 1 of this invention, (b) is the outdoor unit which (b) shows to (a). It is the perspective view of the state which removed the front panel 51 of 200, the side panel 52, the air blower, the fan guard 54, etc. FIG. The first embodiment will be described with reference to the drawings.

  The outdoor unit 200 has, for example, a vertically long outline. That is, as shown in FIG. 1, the outdoor unit 200 includes a front panel 51 that constitutes a front side shell of the outdoor unit 200, a fan guard 54 provided on the top of the outdoor unit 200, and a side shell of the outdoor unit 200. The side panel 52 which comprises this. The outdoor unit 200 is provided with an air suction port 59 for taking in air into the side and back of the outer shell, and an air outlet 55 for exhausting air to the outside at the upper part of the outdoor unit 200. That is, the outdoor unit 200 is formed in the side panel 52 and formed in the air inlet 59 used to take air into the outdoor unit 200 and the fan guard 54, and the air in the outdoor unit 200 is transferred to the outdoor unit 200. It has an air outlet 55 that is used for discharge to the outside.

  The outdoor unit 200 includes a finned tube heat exchanger 100, a base panel 56 that supports the finned tube heat exchanger 100, a compressor 57 that compresses and discharges refrigerant, and an accumulator 58 that stores excess refrigerant. have. The finned tube heat exchanger 100 exchanges heat between the refrigerant supplied to itself and the air passing through the finned tube heat exchanger 100. The finned tube heat exchanger 100 functions as a condenser (heat radiator) during cooling operation to condense and liquefy the refrigerant, and functions as an evaporator during heating operation and evaporates the refrigerant. The finned tube heat exchanger 100 is provided at a position facing the side panel 52, and is fixed to the side panel 52, for example.

  The base panel 56 supports the finned tube heat exchanger 100, the compressor 57, the accumulator 58, and the like, and these are screwed, for example. The base panel 56 constitutes an outer shell on the bottom side of the outdoor unit 200. The compressor 57 is installed on the base panel 56, for example, and compresses and discharges the refrigerant. The compressor 57 is connected to the accumulator 58 on the suction side. The discharge side of the compressor 57 is connected to the finned tube heat exchanger 100 during the cooling operation, and is connected to a use side heat exchanger mounted on an indoor unit (not shown) during the heating operation. The accumulator 58 is connected to the suction side of the compressor 57 and stores liquid refrigerant. A fin tube heat exchanger 100 is erected on the rear side, the right side, and the left side of the accumulator 58.

  In addition, the outdoor unit 200 is equipped with a fan (not shown) that is used to take air into and out of the outdoor unit 200. The fan is exposed when the fan guard 54 is removed, and rotates to take in air into the outdoor unit 200 and exhaust the air out of the outdoor unit 200. Thus, the fan is provided so as to be surrounded by the fan guard 54, and the air outlet 55 is formed on the upper side of the fan. That is, the air that has passed through the finned tube heat exchanger 100 disposed along the air suction port 59 is sucked into the outdoor unit 200 and from the air outlet 55 formed in the upper part of the outer shell through the fan. Exhausted.

  FIG. 2 is a perspective view of the finned tube heat exchanger according to the present embodiment. The x-axis direction, the y-axis direction, and the z-axis direction shown in FIG. 2 are perpendicular to each other. As shown in FIG. 2, the finned tube heat exchanger 100 according to the present embodiment includes a plurality of fins 2 arranged in the x-axis direction at regular intervals, and a plurality of fins 2 penetrating through the plurality of fins 2. A plurality of heat transfer sections 1 each having a heat transfer tube 3 arranged in the y-axis direction orthogonal to the axis direction are provided. A plurality of heat transfer units 1 are arranged in the z-axis direction orthogonal to the x-axis direction and the y-axis direction. Moreover, the several fin which comprises the several heat-transfer part 1 is curved in the direction of the x-axis as a whole. Furthermore, the plurality of heat transfer tubes 3 constituting the plurality of heat transfer units 1 are arranged in a staggered manner so as to be displaced in the y-axis direction when viewed from the z-axis direction.

  The finned tube heat exchanger 100 according to the present embodiment includes a heat transfer medium that flows inside the heat transfer tube 3 and the surface side of the fin 2 (the surface of the fin 2 when the outer surface of the heat transfer tube 3 is not exposed). When the outer surface of the heat transfer tube 3 is exposed, heat exchange is performed between the air flowing through the fins 2 and the surface of the heat transfer tube 3). In FIG. 2, the direction in which the air A flowing on the surface side of the fin flows is the z-axis direction, and the direction in which the heat transfer medium B flowing in the heat transfer tube flows is the x-axis direction.

  FIG. 3 is a perspective view of a main part of the finned tube heat exchanger according to the present embodiment. The finned tube heat exchanger 100 includes a first heat transfer unit 11 and a second heat transfer unit 12. Each heat transfer section is stacked in the z-axis direction. The first heat transfer unit 11 includes a plurality of fins 21 arranged in the x-axis direction, and a heat transfer tube 31 that passes through the plurality of fins 21 and is disposed in the y-axis direction orthogonal to the x-axis direction. It consists of and. The second heat transfer unit 12 includes a plurality of fins 22 arranged in the x-axis direction, and a heat transfer tube 32 that passes through the plurality of fins 22 and is disposed in the y-axis direction orthogonal to the x-axis direction. It consists of and.

  The plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 are formed in a rectangular flat plate shape, and are arranged in parallel along the x-axis direction. It has been. Each of the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 is a thin plate of a metal material, and is entirely curved by pressing or the like in the x-axis direction. Has been. In FIG. 3, the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 are curved in the same direction of the x-axis direction. The curved shape of the fin 2 will be described in detail with reference to FIG. Moreover, in the fin tube type heat exchanger 100 of the present embodiment, the plurality of fins 21 of the first heat transfer unit 11 and the plurality of second heat transfer units 12 are provided from the viewpoint of improving the heat exchange performance. Although the uneven part 4 which cut and raised a part of the fin 22 is provided, the presence or absence of this structure is not specifically limited.

  The heat transfer tubes 31 penetrating the plurality of fins 21 of the first heat transfer unit 11 and the heat transfer tubes 32 penetrating the plurality of fins 22 of the second heat transfer unit 12 are respectively along the longitudinal direction of the fins 2. Are arranged in the y-axis direction orthogonal to the x-axis direction. The heat transfer tube 3 is a tube through which a heat transfer medium flows, and the heat transfer tube 3 has a circular tube having a circular cross-sectional shape, a flat tube with a rectangular cross-sectional shape, and the like. It has been known. In the present embodiment, a flat tube in which the flat longitudinal direction is aligned in the z-axis direction is shown, but a cylindrical tube or the like may be used. The heat transfer tubes 31 that penetrate the plurality of fins 21 of the first heat transfer unit 11 and the heat transfer tubes 32 that penetrate the plurality of fins 22 of the second heat transfer unit 12 are each viewed from the z-axis direction. Are arranged in a staggered pattern so as to be displaced in the direction of the y-axis.

  The heat transfer tube 3 is in close contact with the fin collar (not shown) of the fin 2 and is fitted to the fin collar. The fin collar of the fin 2 is formed during molding such as pressing. As a method of fitting the fin collar and the heat transfer tube 3, there is a method of inserting the fin 2 curved in the x-axis direction into the heat transfer tube 3. As another method, there is a method in which a plurality of curved fins 2 are arranged in parallel and the heat transfer tube 3 is inserted. Further, when inserting the fins 2 into the heat transfer tubes 3, the fins 2 may be inserted one by one, or a plurality of fins 2 may be inserted into the heat transfer tubes 3 simultaneously. As a method of fixing the fin 2 and the heat transfer tube 3 fitted in this way, brazing, a method of fixing using an adhesive, or a method of fixing using a frictional force between the fin collar and the heat transfer tube 3 Etc. The fin 2 is bent by a press or the like when the fin is formed or after the fin is formed. Since the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 are formed in the same manner and have the same curvature, manufacturing is easy. . The heat exchanger can be obtained by stacking the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 which are made in this manner while shifting their positions as shown in FIG. It ’s done. When the fins are not curved as a whole, or when the z-axis direction is not shifted in the y-axis direction even if the fins are curved, the fins are completely overlapped with each other when viewed from the z-axis direction. The exchange efficiency may not be excellent. In the present invention, the fins do not completely overlap each other when viewed from the z-axis direction, and the heat exchange performance can be improved.

  FIG. 4 is a top view showing the main part of the finned tube heat exchanger before bending the fins. FIG. 5 is a top view showing the main part of the finned tube heat exchanger after the fins are curved. As a method of manufacturing a curved fin, it is possible to insert a plurality of uncurved fins into a heat transfer tube, or to insert a heat transfer tube into a plurality of parallel fins that are not curved and then perform a bending process. it can. After fixing the non-curved fin and the heat transfer tube, the fin 2 is moved in the x-axis direction by manually or semi-automatically moving the heat transfer tube in the x-axis direction using a drive mechanism such as a cylinder or a motor. Curve. If this method is used, the fins 2 can be bent using the heat transfer tubes 3, and therefore can be manufactured more easily.

  FIG. 6 is a top view showing one fin 2 of the finned tube heat exchanger 100 of the present embodiment. The fins 2 of the finned tube heat exchanger 100 of the present embodiment as a whole are curved with a certain curve in the x-axis direction.

  FIG. 7 is a front view showing a main part of the finned tube heat exchanger 100 of the present embodiment. The heat transfer tubes 31 that penetrate the plurality of fins 21 of the first heat transfer unit 11 and the heat transfer tubes 32 that penetrate the plurality of fins 22 of the second heat transfer unit 12 are each viewed from the z-axis direction. Are arranged in a zigzag pattern so as to be displaced in the direction of the y-axis. Further, in order to fit the heat transfer tubes 3 to the fin collars of the fins 2, the fins 2 have flat holes that are aligned so that the flat longitudinal direction is the z-axis direction. Since the heat transfer tube 3 in the finned tube heat exchanger 100 of the present embodiment is a flat tube, a flat hole is opened, but this shape matches the shape of the heat transfer tube 3 with a hole. The shape may be changed. Moreover, a through-hole may be sufficient as a hole, and a part of flat plate material may be deform | transformed into the circumference of holes, such as a burring hole. Moreover, the hole of the fin 2 may be biased in the z-axis direction. Further, the hole of the fin 2 may be a slit having a U shape, for example.

  FIG. 8 is a top view showing a main part of the finned tube heat exchanger 100 in the present embodiment. Each of the plurality of fins 21 (shown by broken lines in FIG. 8) of the first heat transfer unit 11 and the plurality of fins 22 (shown by solid lines in FIG. 8) of the second heat transfer unit 12 is the whole. Is curved with a constant curve in the direction of the x-axis. And the heat exchanger tube 3 which penetrates each fin 2 is arrange | positioned in zigzag form so that it may shift | deviate to the direction of a y-axis when it sees from the direction of az-axis. Therefore, the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 have portions that do not match in the x-axis direction and the y-axis direction. When the heat transfer tube 31 that passes through the plurality of fins 21 of the first heat transfer unit 11 is disposed directly below the heat transfer tube 32 that passes through the plurality of fins 22 of the second heat transfer unit 12, The plurality of fins 22 of the heat transfer unit 12 and the plurality of fins 21 of the first heat transfer unit 11 coincide with each other in the x-axis direction and the y-axis direction.

  FIG. 9 is a cross-sectional view in the direction perpendicular to the x-axis showing the main part of the finned tube heat exchanger 100 in the present embodiment, and the plurality of fins 21 of the first heat transfer unit 11 and the second heat transfer. The part which does not correspond in the x-axis direction and the y-axis direction of the plurality of fins 22 of the heat part 12 is shown. Each of the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 is curved with a constant curve in the x-axis direction, so that the first The plurality of fins 21 of the heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 have portions that do not match in the x-axis direction and the y-axis direction. In the finned tube heat exchanger 100 in the present embodiment, the air A flowing in the z-axis direction perpendicular to the direction (x-axis direction) in which the heat transfer medium B flowing inside the heat transfer tube 3 flows, The plurality of fins 21 of the first heat transfer section 11 and the plurality of fins 2 constituting the plurality of fins 22 of the second heat transfer section 12 pass as flow paths. On the other hand, in the location where the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 do not match, the plurality of fins 22 of the first heat transfer unit 12 are configured. The supplied air that has passed between the plurality of fins as a flow path collides with the plurality of fins 21 of the first heat transfer section 11 and collides with the plurality of fins 22 of the second heat transfer section 12. become. Therefore, the air that has passed between the plurality of fins 22 of the second heat transfer section 12 as a flow path easily flows as turbulent flow. As a result, the air passes between the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 as turbulent flow, thereby increasing the heat transfer coefficient. Heat transfer performance can be improved.

  As described above, according to the finned tube heat exchanger in the present embodiment, the plurality of fins arranged at intervals in the x-axis direction and the plurality of fins are perpendicular to the x-axis direction. a plurality of heat transfer units including a plurality of heat transfer tubes arranged in the y-axis direction, the plurality of heat transfer units being arranged in the x-axis direction and the z-axis direction orthogonal to the y-axis direction; The plurality of fins constituting the heat transfer section are curved in the same direction of the x-axis as a whole, and the plurality of heat transfer tubes constituting the plurality of heat transfer sections are staggered when viewed from the z-axis direction. Therefore, the heat exchange performance can be improved while maintaining the ease of manufacturing.

Embodiment 2. FIG.
In the first embodiment, each of the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 is curved in the same direction of the x-axis direction. However, in order to achieve the effect of the present invention, each of the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 is curved in the x-axis direction. Just do it. FIG. 10 is a perspective view of a main part of the finned tube heat exchanger 100 according to the second embodiment of the present invention. As shown in FIG. 10, the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 are all in the opposite direction in the x-axis direction. It is curved. Other configurations are the same as those in the first embodiment, and thus the description thereof is omitted.

  FIG. 11 is a top view showing a main part of the finned tube heat exchanger 100 according to the present embodiment. The plurality of fins 21 of the first heat transfer unit 11 are curved in the x-axis direction as in the first embodiment. On the other hand, the plurality of fins 22 of the second heat transfer unit 12 are entirely curved in a direction opposite to the plurality of fins 21 of the first heat transfer unit 11. And the heat exchanger tube 3 which penetrates each fin 2 is arrange | positioned in zigzag form so that it may shift | deviate to the direction of a y-axis when it sees from the direction of az-axis. Therefore, the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 have more portions that do not match in the x-axis direction and the y-axis direction. Become.

  In the finned tube heat exchanger 100 in the present embodiment, the air A flowing in the z-axis direction perpendicular to the direction (x-axis direction) in which the heat transfer medium B flowing inside the heat transfer tube 3 flows, The plurality of fins 21 of the first heat transfer section 11 and the plurality of fins 2 constituting the plurality of fins 22 of the second heat transfer section 12 pass as flow paths. On the other hand, in the location where the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 do not match, the plurality of fins 22 of the second heat transfer unit 12 are configured. The supplied air that has passed between the plurality of fins as a flow path collides with the plurality of fins 21 of the first heat transfer section 11 and collides with the plurality of fins 22 of the second heat transfer section 12. become. Therefore, a fluid such as air that has passed as a flow path between the plurality of fins 22 of the second heat transfer section 12 easily flows as a turbulent flow.

  In the finned tube heat exchanger 100 of the present embodiment, the plurality of fins 21 of the first heat transfer unit 11 and the plurality of fins 22 of the second heat transfer unit 12 are curved in opposite directions. In the portion where the fins do not coincide with each other in the x-axis direction and the y-axis direction, there are more fins compared to the finned tube heat exchanger 100 of the first embodiment, so that the supplied air is more By passing as a flow path between the plurality of fins 22 of the second heat transfer section 12 as a turbulent flow, the heat transfer rate can be increased as compared with the first embodiment, and the heat exchange performance can be further improved. Can be planned.

  As described above, according to the finned tube heat exchanger in the present embodiment, the plurality of fins arranged at intervals in the x-axis direction and the plurality of fins are perpendicular to the x-axis direction. a plurality of heat transfer units including a plurality of heat transfer tubes arranged in the y-axis direction, the plurality of heat transfer units being arranged in the x-axis direction and the z-axis direction orthogonal to the y-axis direction; The plurality of fins constituting the heat transfer section are curved in the opposite direction for each heat transfer section in the x-axis direction as a whole, and the plurality of heat transfer tubes constituting the plurality of heat transfer sections are from the z-axis direction. Since it is characterized by being arranged in a staggered pattern when viewed, it is possible to improve heat exchange performance while maintaining ease of manufacture.

DESCRIPTION OF SYMBOLS 1 Heat transfer part, 2 Fin, 3 Heat transfer tube, 4 Concavity and convexity part, 11 1st heat transfer part, 12 2nd heat transfer part, 21 Fin of 1st heat transfer part, 22 Second heat transfer part Fin, 31 Heat transfer tube of first heat transfer section, 32 Heat transfer tube of second heat transfer section, 51 Front panel, 52 Side panel, 54 Fan guard, 55 Air outlet, 56 Base panel, 57 Compressor, 58 Accumulator 59 Air inlet, 100 fin tube heat exchanger, 200 outdoor unit.

Claims (4)

A heat transfer section comprising a plurality of fins arranged at intervals in the x-axis direction, and a plurality of heat transfer tubes that pass through the plurality of fins and are arranged in the y-axis direction perpendicular to the x-axis direction A plurality of
The plurality of heat transfer portions are orthogonal to the x-axis direction and the y-axis direction and arranged in the z-axis direction in which air flows ;
The plurality of fins constituting the plurality of heat transfer portions are curved in the x-axis direction as a whole,
By being staggered when said plurality of heat transfer tubes constituting the plurality of heat transfer portion as viewed from the direction of the z-axis, the plurality of fins constituting the plurality of heat transfer portions is the A finned tube heat exchanger having a portion that does not match in the x-axis direction and the y-axis direction . The fin tube heat exchanger according to claim 1, wherein the plurality of fins are curved in the same direction as a whole. The fin tube type heat exchanger according to claim 1, wherein the plurality of fins are curved as a whole in opposite directions for each of the heat transfer portions. It is a manufacturing method of the fin tube type heat exchanger according to claim 1,
Inserting a plurality of fins into a plurality of heat transfer tubes;
Fixing the plurality of fins and the plurality of heat transfer tubes;
A step of bending the plurality of fins as a whole in the direction of the x-axis by moving the plurality of heat transfer tubes in the direction of the x-axis, which is a direction in which the plurality of fins are arranged, using a driving mechanism; A manufacturing method of a fin tube type heat exchanger characterized by including.

Images