heat exchanger

Abstract

The heat exchanger includes a fin group and a tube group for heat exchange medium. The fin group comprises a plurality of polygonal, flat, plate-shaped fins with acute-angled first corners. The plurality of fins are arranged with gaps through which air for air conditioning passes, configured such that the air conditioning air flows in a first direction along the edge of the first corner. The tube group includes a plurality of heat-conducting tubes serpentine in the first direction. Each heat-conducting tube includes a plurality of fin mounting portions mounted on the fin group, passing through the fin group. In the fins, between first fin mounting portions adjacent to the first direction, second fin mounting portions adjacent to the first fin mounting portions are located in a direction orthogonal to the first direction.

Description

Technical Field

[0001] This disclosure relates to a heat exchanger. Background Technology

[0002] Japanese Patent Application Publication No. 2013-100992 discloses a heat exchange coil built into an air conditioner. The heat exchange coil has the following structure: multiple fins of a rectangular fin group are arranged with gaps through which air for air conditioning passes, and a group of heat-conducting pipes for the flow of heat exchange medium passes through and is mounted on the multiple fins. Summary of the Invention

[0003] If the heat exchange coil is tall, the air conditioner equipped with it cannot be installed in a narrow ceiling space, i.e., a narrow attic, so sometimes a machine room for the air conditioner is required. Since the downward slope of the drain pipes for an air conditioner equipped with the heat exchange coil cannot be guaranteed, a drain-up pump is sometimes also needed. This increases costs.

[0004] A heat exchanger according to one embodiment of the present disclosure includes: a fin group; and a tube group for exchanging heat with air conditioning air by means of a heat exchange medium that flows through and is mounted on the fin group. The fin group includes a plurality of plate fins, each plate fin being a polygonal flat plate with an acute interior angle at a first corner of a plurality of corners. The plurality of plate fins are configured to overlap each other with their surfaces separated by gaps through which the air conditioning air passes, and are configured such that the air conditioning air flows in a first direction along either a first side or a second side forming the first corner. The tube group includes a plurality of heat-conducting tubes that serpentine and extend along the first direction. The heat-conducting tubes include a plurality of fin mounting portions, which are spaced apart in the direction along the first side and the direction along the second side, and penetrate the fin group and are repeatedly mounted on the fin group. The plurality of fin mounting portions mounted on the plate fin are configured as follows: between the first fin mounting portions adjacent to the first direction, the second fin mounting portions adjacent to the first fin mounting portions are along the plate surface of the plate fin and located in a direction orthogonal to the first direction.

[0005] The above and further products, features and advantages of this disclosure will become more fully apparent from the accompanying drawings and the following description of preferred embodiments. Attached Figure Description

[0006] Figure 1 This is a perspective view showing an example of the structure of a heat exchanger according to an embodiment;

[0007] Figure 2 Viewed from the long side Figure 1A simplified diagram illustrating a heat exchanger;

[0008] Figure 3 This is an explanatory diagram viewed from the central axis of the fin mounting section;

[0009] Figure 4 yes Figure 3 Enlarged view of the main parts;

[0010] Figure 5 yes Figure 4 A three-dimensional view of the main parts;

[0011] Figure 6 This is a simplified explanatory diagram showing an example of the use of a heat exchanger according to an embodiment. Detailed Implementation

[0012] First, an example of the technology according to this disclosure will be described. A heat exchanger according to a first embodiment of this disclosure includes: a fin group; and a tube group for exchanging heat with air conditioning air through a heat exchange medium that flows through and is mounted on the fin group; the fin group includes a plurality of plate fins, each plate fin being a polygonal plate with an acute interior angle of a first corner among a plurality of corners, the plurality of plate fins being arranged such that their surfaces overlap each other across gaps through which the air conditioning air passes, and the air conditioning air is arranged to flow in a first direction, the first direction being along either a first side or a second side forming the first corner; the tube group includes a plurality of heat-conducting tubes that serpentine and extend along the first direction; the heat-conducting tubes include a plurality of fin mounting portions, the plurality of fin mounting portions being arranged at intervals along the direction along the first side and along the second side, and passing through and repeatedly mounted on the fin group. The plurality of fin mounting portions mounted on the plate fin are arranged in a manner such that a second fin mounting portion is positioned between the first fin mounting portions adjacent to the first direction, the second fin mounting portion being adjacent to the first fin mounting portion (5) in a direction along the plate surface of the plate fin and orthogonal to the first direction.

[0013] According to the first embodiment, compared with a comparative heat exchanger described below, the heat exchanger of this disclosure increases the width of the airflow path for air conditioning and reduces airflow resistance, i.e., pressure loss. The heat exchanger of the comparative embodiment has rectangular fins and has the same structure and heat conduction or heat exchange capacity as the heat exchanger of this disclosure. Therefore, the heat exchanger of this disclosure can improve its heat exchange capacity by increasing one or both of the air velocity and air volume, or the increased heat exchange capacity can be used to reduce its size.

[0014] The heat exchanger according to this disclosure, which can increase one or both of wind speed and air volume, is suitable for use in indoor spaces such as server rooms that require strict temperature management, thereby achieving energy-saving effects and also saving space.

[0015] The heat exchanger disclosed herein can reduce its height. Air conditioners with this heat exchanger built-in can be made thinner by reducing their height. Therefore, the air conditioner can be easily installed even in narrow ceilings, making efficient use of dead space without requiring a machine room. Furthermore, this air conditioner ensures a proper downward slope for drainage pipes, eliminating the need for a drain pump and thus reducing costs.

[0016] Although the height of the heat exchanger is reduced according to this disclosure, the effective length of the heat-conducting pipe and the heat-conducting area of ​​the fins can be increased in order not to increase the pressure loss.

[0017] In a heat exchanger of the second aspect according to this disclosure, based on the first aspect, the fins may also be configured such that the first corner is located upstream in the first direction.

[0018] According to the second configuration, the heat exchanger can widen the flow path of the air conditioning air from the inlet to the interior, thereby reducing pressure loss.

[0019] In a heat exchanger of the third aspect according to this disclosure, based on the first or second aspect, the plate fin may be quadrilateral, wherein the interior angle of the second corner located opposite the first corner is an acute angle.

[0020] According to the third configuration, in the fins, the inner angles of the upstream corner and the downstream corner in the first direction are acute angles. Multiple fins form an outlet for air conditioning through the space between them downstream, extending in a direction obliquely intersecting the first direction. Drainage generated during cooling is able to fall downwards by gravity through the space between the fins, and is suppressed by the airflow speed of the air conditioning system, accumulating at the outlet and dissipating outwards.

[0021] In the heat exchanger of the fourth embodiment according to this disclosure, which is based on any of the first to third embodiments, the interior angle of the acute-angled corner may be 20° or more and 40° or less.

[0022] According to the fourth configuration, by having an interior angle of 20° or more at the acute-angled corner, the length of the heat exchanger along the first direction can be prevented from becoming too long. Therefore, the installation space required for the heat exchanger can be reduced. By having an interior angle of 40° or less at the acute-angled corner, the height of the heat exchanger along the direction perpendicular to the first direction can be prevented from becoming too high. Therefore, the airflow resistance of the heat exchanger can be reduced.

[0023] Alternatively, the heat exchanger of the fifth embodiment according to this disclosure, based on any of the first to fourth embodiments, includes at least one protrusion on the portion of the plate fin between the fin mounting portions adjacent to the fin mounting portions in the second direction intersecting the first direction. This protrusion guides and directs the airflow of the air conditioning air that moves along the outer periphery of the fin mounting portions in the form of surrounding the outer peripheral surface of the fin mounting portions.

[0024] According to the fifth form, the heat exchange efficiency of the air conditioning is improved because the air is guided and directed by the protrusions to flow in a serpentine manner around the heat pipe.

[0025] In a heat exchanger based on the fifth aspect and the sixth aspect of this disclosure, the at least one protrusion may be integral with the plate fin and be a cut-out bridge cut from the plate fin in a bridge-like manner.

[0026] According to the sixth form, the protrusions can be formed by cutting the fins. Therefore, for example, even when multiple protrusions need to be formed, the protrusions can be easily formed while maintaining their strength. Furthermore, the cost of forming the protrusions can be reduced.

[0027] In a heat exchanger based on the fifth or sixth form according to the seventh form of this disclosure, there may also be a gap between the at least one protrusion and the fin mounting portion adjacent to the second direction.

[0028] According to the seventh embodiment, the air conditioning air is guided and directed through the gap between the fin mounting portions adjacent to the second direction by the protrusion. Therefore, the air conditioning air flows along the outer periphery of the fin mounting portions in a manner that surrounds the outer peripheral surface of the fin mounting portions, thereby improving the heat exchange efficiency of the air conditioning air.

[0029] In the heat exchanger of the eighth embodiment of this disclosure, based on any of the fifth to seventh embodiments, the at least one protrusion may have a strip-like shape extending along the second direction.

[0030] According to the eighth form, the protrusion captures the air conditioning air passing between the fin mounting portions adjacent to the second direction, and can effectively guide and direct the captured air conditioning air to the two fin mounting portions.

[0031] In a heat exchanger according to the ninth embodiment of this disclosure based on any of the fifth to eighth embodiments, the at least one protrusion may include a plurality of protrusions between the fin mounting portions adjacent to the second direction, the plurality of protrusions being arranged in the first direction.

[0032] According to the ninth configuration, multiple protrusions are arranged from upstream to downstream of the air conditioning airflow between the fin mounting portions adjacent to the second direction. Therefore, the downstream protrusions guide and direct the bypass airflow that passes through the upstream protrusions. This improves the efficiency of guiding and directing the air conditioning air.

[0033] In the heat exchanger of the tenth embodiment of this disclosure, based on the ninth embodiment, the multiple protrusions may also have different lengths as they lengthen away from the line connecting the fin mounting portion adjacent to the second direction.

[0034] According to the tenth embodiment, the multiple protrusions have a length corresponding to the size of the gap between the fin mounting portions adjacent in the second direction. Therefore, the multiple protrusions can effectively capture, guide, and direct the airflow for air conditioning between the fin mounting portions adjacent in the second direction.

[0035] In the heat exchanger of the eleventh embodiment of this disclosure, based on the ninth or tenth embodiment, it is also possible that the ends of one of the plurality of protrusions are positioned along the outer periphery of one of the fin mounting portions adjacent to the second direction, and the ends of the other of the plurality of protrusions are positioned along the outer periphery of the other of the fin mounting portions adjacent to the second direction.

[0036] According to the eleventh embodiment, a gap is formed between the fin mounting portion adjacent to the second direction and the plurality of protrusions, with the gap shaped along the outer periphery of the fin mounting portion. Therefore, the flow of air conditioning air flowing along the outer periphery of the fin mounting portion in the form of surrounding the outer peripheral surface of the fin mounting portion is effectively formed.

[0037] In the heat exchanger of the twelfth embodiment of this disclosure, based on any of the first to eleventh embodiments, the plurality of heat-conducting tubes may have an elliptical cross-section, and the plurality of heat-conducting tubes may be arranged such that the major axis of the elliptical cross-section is oriented along the first direction.

[0038] According to the twelfth embodiment, since the outer periphery of the heat pipe's cross-section is elliptical, the pressure loss of the heat pipe is low. Therefore, the heat exchanger according to this disclosure is suitable for small water volumes with large temperature differences, which relates to the reduction of pump power and equipment cost for the heat exchanger.

[0039] In the heat exchanger of the thirteenth embodiment of this disclosure, based on any of the first to twelfth embodiments, the second fin mounting portion may be disposed in the plate fin at a position offset from the first fin mounting portion in a direction orthogonal to the first direction, and disposed between the first fin mounting portions in the first direction.

[0040] According to the thirteenth configuration, the first fin mounting section and the second fin mounting section are staggered relative to the first direction. Air conditioning air passing through the heat exchanger flows meanderingly in the first and second fin mounting sections by changing its flow direction, allowing for effective contact and heat exchange with the heat pipes and fins. Furthermore, the meandering flow path of the air conditioning air can have a wide path width. Therefore, heat exchange efficiency is improved.

[0041] Exemplary embodiments of this disclosure are described below with reference to the accompanying drawings. The embodiments described below are general or specific examples. Elements in the following embodiments that represent the highest-level concept but are not described in the independent claims may be described as any arbitrary element. The figures in the accompanying drawings are schematic and not necessarily strictly illustrative. Substantially identical elements in the figures are labeled with the same symbols, and sometimes descriptions are omitted or briefly repeated. In this specification and claims, "apparatus" can refer not only to a single apparatus but also to a system composed of multiple apparatuses.

[0042] Figures 1 to 5 This illustrates an example of the structure of a heat exchanger 100 according to an embodiment. While not limiting, in this embodiment, the heat exchanger 100 includes coil-shaped heat-conducting pipes and is also referred to as a coil-type heat exchanger. Figure 1 As shown, the heat exchanger 100 includes a heat exchange coil 101, which is a structure having a fin group 1 and a tube group 2.

[0043] Airflow for air conditioning flows in a first direction F, which is the airflow direction, and is supplied to heat exchanger 100. The first direction F is indicated by a thick dashed arrow. Pipe group 2 passes through and is mounted on fin group 1. The heat exchange medium M flows inside pipe group 2, specifically inside the multiple heat-conducting pipes 4 included in pipe group 2. The heat exchange medium M exchanges heat with the air conditioning air through the heat-conducting pipes 4, etc., enabling the air conditioning air to reach a temperature suitable for air conditioning.

[0044] The technology disclosed herein can be applied to structures that exchange heat between chilled or warm water as a heat exchange medium and air conditioning air, structures that exchange heat between refrigerants such as Freon as a heat exchange medium and air conditioning air, and structures that exchange heat between other heat exchange media and air conditioning air. An example of an application of a structure that exchanges heat between chilled or warm water and air conditioning air is shown in the figure.

[0045] The fin group 1 comprises a combination of multiple plate fins 3. The plate fins 3 have a flat plate shape. In this embodiment, the planar shapes and planar dimensions of the multiple plate fins 3 are the same as each other, but they may also be different from each other. The heat exchange coil 101, which includes multiple plate fins 3 and the tube group 2, is also referred to as a plate-fin coil, and the heat exchanger 100 is also referred to as a plate-fin coil type heat exchanger.

[0046] Although not limited, in this embodiment, the planar shape of the plate of the plate wing 3 is quadrilateral. One or more of the four corners of the quadrilateral of the plate wing 3 have acute interior angles. For example, the corner of the plate wing 3 located upstream in the first direction F can be at least an acute angle. For example, the corner of the plate wing 3 located downstream in the first direction F can be at least an acute angle.

[0047] In this embodiment, the interior angles of the two corners 3A and 3B, which are located opposite each other in the plate fin 3, are acute angles. Corner 3A is located at the upstream end in the first direction F, and corner 3B is located at the downstream end in the first direction F. The plate fin 3 has a parallelogram-shaped flat plate, and the interior angles of corners 3A and 3B can be the same. In the illustrated example, the plate fin 3 has a parallelogram-shaped flat plate.

[0048] In this specification and claims, "parallelogram" can include: a quadrilateral in which the opposite angles of each of two pairs of opposite angles are identical; a quadrilateral in which the opposite angles of one of the pairs of opposite angles are different but are substantially considered parallelograms; and a quadrilateral in which the opposite angles of both pairs of opposite angles are different but are substantially considered parallelograms. "Parallelogram" also includes a rhombus. A state in which multiple shapes are identical can include a state in which multiple shapes are completely identical and a state in which multiple shapes are substantially identical. A state in which multiple dimensions are identical can include a state in which multiple dimensions are completely identical and a state in which multiple dimensions are considered substantially identical. "Parallel" can include a state in which they are perfectly parallel and a state in which they are substantially parallel. "Perpendicular" or "orthogonal" can include a state in which they are perfectly perpendicular or orthogonal and a state in which they are substantially perpendicular or orthogonal.

[0049] In the plate fin 3, the interior angle θ of the acute-angled corner can be 20° or more and 40° or less, or preferably about 30°. For example, in the parallelogram-shaped plate fin 3, the interior angle θ of the acute-angled corners 3A and 3B is 20° or more and 40° or less, preferably about 30°. An angle of about 30° can include a 30° angle and an angle considered substantially 30°. For example, an angle with a difference of ±1% relative to 30° can be considered substantially 30°.

[0050] Multiple fins 3 are separated from adjacent fins by gaps for air conditioning air to pass through, such that adjacent fins 3 and their respective plate surfaces 3a face each other. For example, the plate surface 3a is the main surface of the flat plate of the fin 3. When viewed from a third direction D3, which is the direction in which the multiple fins 3 are arranged, the plate surfaces 3a are arranged in an overlapping manner. The multiple fins 3 are arranged in a row in the third direction D3. Since the planar shape and planar dimensions of the multiple fins 3 are the same, the plate surfaces 3a of the multiple fins 3 can be hidden by the plate surfaces 3a of adjacent fins 3. In this embodiment, the third direction D3 is a direction perpendicular to the plate surfaces 3a.

[0051] For example, multiple plates 3 are configured such that air conditioning air flows in a first direction F along either a first side direction A or a second side direction B, where the first side direction A is along the first side 3aa of the plate surface 3a, and the second side direction B is along the second side 3ab of the plate surface 3a. The second side 3ab is adjacent to the first side 3aa in an acute-angled corner 3A of the plate surface 3a. The first side 3aa and the second side 3ab form the acute-angled corner 3A. Figure 1 In the example, the first direction F is along the first side direction A, and the second side direction B is an example of the second direction D2. When the plate wing 3 is a parallelogram shape, the first side direction A is along the short side of the short side of the plate surface 3a, and the second side direction B is along the long side of the long side of the plate surface 3a.

[0052] Here, it is considered to maintain the heat exchange capacity of the heat exchanger equally before and after the structural change, and the housing structure of the heat exchanger 100 according to this embodiment is changed. The heat exchanger 100 according to this embodiment includes a plurality of fins 3 with an interior angle θ of 20° or more and 40° or less for the acute-angled corner portions 3A and 3B.

[0053] For example, if the structure of the heat exchanger 100 is modified such that the interior angle θ of the acute-angled corners 3A and 3B of each of the multiple fins 3 is less than 20°, the dimension of the first direction F of the modified heat exchanger needs to be longer than that before the modification. Therefore, the installation space required for the modified heat exchanger is greater than that before the modification.

[0054] For example, if the structure of the heat exchanger 100 is modified such that the interior angle θ of the acute-angled corners 3A and 3B of the multiple fins 3 is greater than 40°, the height of the modified heat exchanger needs to be higher than that before the modification. Therefore, the airflow resistance of the modified heat exchanger will be greater than that before the modification.

[0055] Air outlet 7 for air conditioning is disposed on the side of fin group 1. For example, air outlet 7 is disposed or formed on either side 1a of fin group 1 arranged on the third side 3ac of fin group 1 or side 1b of fin group 1 arranged on the fourth side 3ad of fin group 1. The third side 3ac is the side of fin surface 3a facing the first side 3aa. The fourth side 3ad is the side of fin surface 3a facing the second side 3ab. In this embodiment, air outlet 7 for air conditioning is disposed on side 1b. Air outlet 7 for air conditioning is inclined in a manner that descends from upstream to downstream in the first direction F. Fin group 1 allows water generated during cooling to fall downwards by gravity between fins 3, and the airflow speed of air conditioning can prevent water from accumulating at air outlet 7 for air conditioning. Thus, the scattering of water is prevented.

[0056] like Figure 2 As shown, the tube group 2 includes multiple heat-conducting tubes 4 that zigzag through and extend along the first direction F. The inlet and outlet of the heat exchange medium M of the tube group 2 are connected to their respective headers 13. That is, the inlet and outlet of the heat exchange medium M of the multiple heat-conducting tubes 4 are connected to different headers 13. Each heat-conducting tube 4 includes multiple fin mounting portions 5 that penetrate multiple fins 3 of the fin group 1 and are mounted on the multiple fins 3. In the fin mounting portions 5, the heat-conducting tube 4 penetrates the fins 3 and is mounted on the fins 3. The fins 3 include multiple through holes through which the heat-conducting tube 4 passes. The heat-conducting tube 4 penetrates the multiple fins 3 of the fin group 1 and is repeatedly mounted on the multiple fins 3 in the multiple fin mounting portions 5 that are spaced apart in the first side direction A and the second side direction B.

[0057] like Figure 3 and Figure 4 As shown, the heat pipe 4 can also have an elliptical cross-section. The heat pipe 4 can also be arranged on the fin 3 with the major axis LA of the elliptical cross-section aligned with the first direction. That is, the major axis of the elliptical outer periphery of the fin mounting portion 5 is aligned with the first direction F. Multiple fin mounting portions 5 of the fin 3 are arranged between fin mounting portions 5a and 5b adjacent to the first direction F, and fin mounting portions 5c adjacent to fin mounting portions 5a and 5b are located along the plate surface 3a of the fin 3 and orthogonal to the first direction F. The fin mounting portion 5c is offset from the fin mounting portions 5a and 5b between the fin mounting portions 5a and 5b, in a direction along the plate surface 3a and orthogonal to the first direction F. This increases the width L of the airflow path for air conditioning.

[0058] For example, regarding the flow path width L around the fin mounting portions 5a, 5b, and 5c, there are a first housing and a second housing. The width of the first housing between the fin mounting portions 5a and 5c in the direction of their arrangement is the flow path width L. The width of the second housing between the fin mounting portions 5b and 5c in the direction of their arrangement is also the flow path width L. The flow path width L of the first housing is greater than the width between the fin mounting portions 5a and 5c in the direction perpendicular to the first direction F. The flow path width L of the second housing is greater than the width between the fin mounting portions 5b and 5c in the direction perpendicular to the first direction F. Thus, by virtue of the synergistic effect of the outer periphery shape of the heat pipe 4's cross-section and the arrangement of the fin mounting portions 5, the airflow resistance experienced by the air conditioning air is significantly reduced.

[0059] like Figure 4 and Figure 5 As shown, the plate fin 3 includes one or more protrusions 6 on the portion of the plate fin 3 between the fin mounting portions 5 adjacent to the second direction D2. The second direction D2 is the direction that intersects the first direction F, and in this embodiment, multiple protrusions 6 are included. Although not limited, in this embodiment, the second direction D2 is the direction along the second side direction B. The one or more protrusions 6 between the two fin mounting portions 5 have the following shape and arrangement: guiding and directing the airflow of air conditioning air that moves along the outer periphery of the two fin mounting portions 5 in the form of surrounding the outer peripheral surfaces of the two fin mounting portions 5.

[0060] Although not limited, in this embodiment, the plurality of protrusions 6 are strip-shaped protrusions extending in a direction intersecting the first direction F. For example, the plurality of protrusions 6 extend from one of the two fin mounting portions 5 toward the other. The plurality of protrusions 6 may also extend along the second direction D2. The plurality of protrusions 6 are arranged in the first direction F. The plurality of protrusions 6 are straight strip-shaped protrusions, but they may also be non-straight strip-shaped protrusions. The straight plurality of protrusions 6 are arranged parallel to each other, but they may also be non-parallel to each other.

[0061] There is a gap between two fin mounting portions 5 adjacent to the plurality of protrusions 6. The plurality of protrusions 6 between the two fin mounting portions 5 can have different lengths. For example, the length of the plurality of protrusions 6 can also vary as it increases in length as it moves away from the line connecting the two fin mounting portions 5. The aforementioned line can also be a line connecting the centers of the two fin mounting portions 5. For example, the length of the plurality of protrusions 6 can also vary as follows: the ends of the plurality of protrusions 6 on one side are positioned along the outer periphery of the cross-section of one fin mounting portion 5, and the ends of the plurality of protrusions 6 on the other side are positioned along the outer periphery of the cross-section of the other fin mounting portion 5.

[0062] As described above, the multiple protrusions 6 cause the airflow of the air conditioning unit to meander, increasing the contact distance between the air conditioning unit and the fins 3 and the heat pipes 4, that is, increasing the amount of heat transfer between them. In addition, the multiple protrusions 6 reduce the amount of bypass air that passes linearly between the two fin mounting portions 5 from the air conditioning unit.

[0063] The protrusion 6 can be integral with the plate fin 3 or separate from it. In this embodiment, the protrusion 6 is integral with the plate fin 3. The protrusion 6 can be formed from the same material as the plate fin 3, or it can be formed from a part of the plate fin 3. In this embodiment, the protrusion 6 is a cut-out bridge formed by processing the plate fin 3. Hereinafter, "protrusion 6" will sometimes be referred to as "cut-out bridge 6". The cut-out bridge 6 can be formed by cutting a part of the plate fin 3 into a bridge shape and performing a cut-out process. The planar shape of the cut-out bridge 6 is not particularly limited and can be quadrilateral. The four sides of the quadrilateral of the cut-out bridge 6 can be parallel to one or more of the four sides 3aa, 3ab, 3ac, and 3ad of the plate surface 3a of the plate fin 3.

[0064] The planar shape of the cutting bridge 6 can be the same as that of the plate wing 3, or it can be a parallelogram shape. In this case, each side of the parallelogram of the cutting bridge 6 can be parallel to each side of the plate surface 3a.

[0065] For example, the parallelogram-shaped cut-off bridge 6 is formed as follows: the plate fin 3 is cut off along the two long sides of the parallelogram in the second side direction B, and a portion of the plate fin 3 is erected in the vertical direction of the plate surface 3a, using the two short sides in the first side direction A as fold lines. Thus, the cut-off bridge 6 has a bridge-like shape that opens towards the first direction F from its side in the second side direction B. The end of the fold line portion of the cut-off bridge 6 is located along the outer peripheral surface of the elliptical cross-section having the fin mounting portion 5.

[0066] Figure 6This is an example of using the heat exchanger 100 according to the embodiment in an air conditioner 8. The air conditioner 8 includes: a heat exchange unit 9 that exchanges heat with air conditioning air; an air supply unit 11 with a built-in fan 10 that supplies air conditioning air to the indoor space IS via the heat exchange unit 9; and an air supply duct 12. The heat exchange unit 9 includes the heat exchanger 100. The heat exchange unit 9, the air supply unit 11, the indoor space IS, and indoor and outdoor spaces (not shown) are connected via the air supply duct 12. For example, the air supply duct 12 connects the heat exchange unit 9 and the air supply unit 11 to each other. The heat exchange unit 9 exchanges heat with the air conditioning air supplied through the air supply unit 11. The air conditioner 8 supplies the air conditioning air that has undergone heat exchange in the heat exchange unit 9 to the indoor space IS. For example, the heat exchange unit 9 and the air supply unit 11 are installed in the space inside the ceiling S of various buildings such as office buildings. The air conditioner 8 can have an integrated structure of heat exchange unit 9 and air supply unit 11, or it can have a structure that independently includes heat exchange unit 9 and air supply unit 11.

[0067] The embodiments of this disclosure have been described above, but this disclosure is not limited to the embodiments described above. That is, various modifications and improvements can be made within the scope of this disclosure. For example, forms constituted by applying various modifications within the embodiments and combining structural elements from different embodiments are all included within the scope of this disclosure.

[0068] For example, in the heat exchanger 100 according to the embodiment, the air outlet 7 for air conditioning may also have a structure that is inclined in a way that descends from downstream to upstream in the first direction F.

[0069] For example, in the heat exchanger 100 according to the embodiment, the outer periphery shape of the cross-section of the fin mounting portion 5 of the heat-conducting pipe 4 of the pipe group 2 can be any shape other than elliptical.

[0070] In the heat exchanger 100 according to the embodiment, the planar shape of the plate fin 3 is quadrilateral, but not limited thereto, it may also be triangular or a polygon with 5 or more corners.

[0071] In the heat exchanger 100 according to the embodiment, the planar shape of the plate fin 3 is a quadrilateral such that the interior angles of the two opposing corners 3A and 3B are acute angles, but it is not limited to this. For example, one interior angle of corners 3A and 3B may be an acute angle, and the interior angles of the three corners may be 90° or more. In this case, the planar shape of the plate fin 3 may be a right trapezoid.

[0072] The numbers, quantities, and other figures used in this document are illustrative for the purpose of illustrating the technology of this disclosure, and this disclosure is not limited to the illustrative figures. The connecting relationships between the constituent elements are illustrative for the purpose of illustrating the technology of this disclosure, and the connecting relationships for realizing the functions of this disclosure are not limited to these.

[0073] This disclosure can be implemented in various forms without departing from its essential characteristics. Since the scope of this disclosure is defined by the appended claims rather than by the description in the specification, these embodiments and variations are exemplary and not restrictive. It is intended that all modifications or equivalents of the claims and their scope are included within the scope of the claims.

[0074] Symbol explanation:

[0075] 1 Fin Group

[0076] 2-pipe group

[0077] 3-plate wings

[0078] 3A First Corner

[0079] 3B Second Corner

[0080] 3a board surface

[0081] 3aa First side

[0082] 3ab second side

[0083] 4 heat pipes

[0084] 5. Fin mounting section

[0085] 6. Protrusions and shear bridges

[0086] 100 heat exchanger

[0087] A First side direction

[0088] B Second side direction

[0089] D2 Second Direction

[0090] F airflow direction, first direction

[0091] θ internal angle.

Claims

1. A heat exchanger (100), characterized in that, It includes: a fin group (1); and a pipe group (2) that passes through the fin group (1), is installed on the fin group (1), and has a heat exchange medium flowing inside it to exchange heat with the air for air conditioning. The fin group (1) includes a plurality of plate fins (3), which are polygonal flat plates with an acute interior angle (θ) of the first corner (3A) of a plurality of corners. The plurality of plate fins (3) are arranged to overlap each other with their plate surfaces (3a) through a gap through which the air conditioning air passes, and are arranged such that the air conditioning air flows in a first direction (F), which is along the first side (3aa) of the first side (3aa) and the second side (3ab) forming the first corner (3A). The tube group (2) includes a plurality of heat-conducting tubes (4) that snake across the first direction and extend along the first direction (F). The heat pipe (4) includes a plurality of fin mounting portions (5), which are arranged at intervals along the direction (A) along the first side (3aa) and along the direction (B) along the second side (3ab), and penetrate the fin group (1) and are repeatedly mounted on the fin group (1); A plurality of fin mounting portions (5) mounted on the plate fin (3) are arranged between the first fin mounting portions (5) adjacent to the first direction (F) in such a way that the second fin mounting portions (5) are in place. The second fin mounting portions (5) are adjacent to the first fin mounting portions (5) in a direction along the plate surface (3a) of the plate fin (3) and orthogonal to the first direction (F). The plate fin (3) is configured such that the first corner (3A) is located upstream of the first direction (F); The plate fin (3) is quadrilateral in shape; In the plate wing (3), the interior angle (θ) of the second corner (3B) located opposite the first corner (3A) is an acute angle; The plate wing (3) includes a third side (3ac) and a fourth side (3ad) forming the second corner (3B). The third side (3ac) is located below the first side (3aa) in the direction of gravity and faces the first side (3aa). The fourth side (3ad) is located downstream of the second side (3ab) in the first direction (F) and faces the second side (3ab). The first side (3aa) and the third side (3ac) extend along the first direction (F); The second side (3ab) and the fourth side (3ad) are inclined downward in the direction of gravity than the first side (3aa) in a manner that descends from upstream to downstream in the direction of gravity in the first direction (F); The heat exchanger (100) has an air outlet (7) for air conditioning, which is disposed on the side (1b) of the fin group (1) arranged on the fourth side (3ad) and is inclined in a manner that descends from the upstream of the first direction (F) toward the downstream in the direction of gravity.

2. The heat exchanger (100) according to claim 1, characterized in that, The interior angle (θ) of the acute-angled corner is greater than 20° and less than 40°.

3. The heat exchanger (100) according to claim 1, characterized in that, At least one protrusion (6) is included on the portion of the plate fin (3) between the fin mounting portions (5) adjacent to the second direction intersecting the first direction (F), the protrusion (6) guiding and directing the airflow of the air conditioning air that moves along the outer periphery of the fin mounting portion (5) in the form of surrounding the outer peripheral surface of the fin mounting portion (5).

4. The heat exchanger (100) according to claim 3, characterized in that, The at least one protrusion (6) is integral with the plate wing (3) and is a cut-out bridge cut from the plate wing (3) in a bridge shape.

5. The heat exchanger according to claim 3 or 4, characterized in that, There is a gap between the at least one protrusion (6) and the fin mounting portion (5) adjacent to the second direction.

6. The heat exchanger (100) according to claim 3 or 4, characterized in that, The at least one protrusion (6) has a band-like shape extending in the second direction.

7. The heat exchanger (100) according to claim 3 or 4, characterized in that, The at least one protrusion (6) includes a plurality of protrusions (6) between the fin mounting portions (5) adjacent to the second direction; The plurality of protrusions (6) are arranged in the first direction (F).

8. The heat exchanger (100) according to claim 7, characterized in that, The plurality of protrusions (6) have different lengths as they lengthen as they leave the line connecting the fin mounting portion (5) adjacent to the second direction.

9. The heat exchanger (100) according to claim 7, characterized in that, The ends of one of the plurality of protrusions (6) are located on the outer periphery of one of the fin mounting portions (5) adjacent to the second direction; The ends of the plurality of protrusions (6) are located on the outer periphery of the fin mounting portion (5) adjacent to the second direction.

10. The heat exchanger (100) according to any one of claims 1 to 4, characterized in that, The plurality of heat pipes (4) include a cross-section with an elliptical outer periphery; The plurality of heat pipes (4) are configured such that the major axis of the elliptical cross section is oriented along the first direction (F).

11. The heat exchanger (100) according to any one of claims 1 to 4, characterized in that, In the plate fin (3), the second fin mounting portion (5) is disposed at a position offset from the first fin mounting portion (5) in a direction orthogonal to the first direction (F), and is disposed at a position between the first fin mounting portions (5) in the first direction (F).

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