CN219283482U

CN219283482U - Heat exchanger

Info

Publication number: CN219283482U
Application number: CN202320110373.9U
Authority: CN
Inventors: 木村惠一; 浦野胜博; 盐地正纪
Original assignee: Kimura Kohki Co Ltd
Current assignee: Kimura Kohki Co Ltd
Priority date: 2022-01-25
Filing date: 2023-01-19
Publication date: 2023-06-30
Anticipated expiration: 2033-01-19
Also published as: AU2022279430A1; AU2022279430B2; EP4215863A1; US20230235974A1; CN116538579A; KR20230114705A; CA3183026A1

Abstract

The heat exchanger includes a fin group and a tube group for a heat exchange medium. The fin group includes a plurality of plate fins having a polygonal flat plate shape with a first corner having an acute angle. The plurality of plate fins are disposed with a gap through which air for air conditioning passes, and are arranged such that the air for air conditioning flows in a first direction along a side of the first corner. The tube group includes a plurality of heat pipes that meander in the first direction. The heat transfer pipe includes a plurality of fin mounting portions mounted on the fin group through the fin group. In the plate fin, between the first fin mounting portions adjacent to the first direction, the second fin mounting portions adjacent to the first fin mounting portions are located in a direction orthogonal to the first direction.

Description

Heat exchanger

Technical Field

The present disclosure relates to a heat exchanger.

Background

Japanese patent application laid-open No. 2013-100992 discloses a heat exchange coil built in an air conditioner. The heat exchange coil has the following structure: the plurality of rectangular plate fins are disposed with gaps through which air for air conditioning passes, and the heat transfer tube group through which the heat exchange medium flows penetrates the plurality of plate fins and is attached to the plurality of plate fins.

Disclosure of Invention

If the height of the heat exchange coil is high, the air conditioner provided with the heat exchange coil cannot be installed in a narrow ceiling space, that is, a narrow attic, and therefore a machine room for the air conditioner may be required. Since the downward gradient of the drain (drain) pipe of the air conditioner having the heat exchange coil cannot be ensured, a drain pump (drain up pump) is sometimes required. This results in an increase in cost.

A heat exchanger according to an aspect of the present disclosure includes: a fin group; and a tube group penetrating the fin group and mounted on the fin group, wherein the tube group exchanges heat between the heat exchange medium flowing inside and air for air conditioning. The fin group includes a plurality of plate fins having a flat plate shape in which an inner angle of a first corner of the plurality of corners is a polygon having an acute angle, and the plurality of plate fins are arranged so that plate surfaces of the plurality of plate fins overlap each other with a gap through which the air for air conditioning passes interposed therebetween, and are arranged so that the air for air conditioning flows in a first direction along either one of a first side or a second side forming the first corner. The tube group includes a plurality of heat conductive tubes that meander in a manner transverse to the first direction and extend in the first direction. The heat transfer tube includes a plurality of fin attachment portions that are disposed at intervals in a direction along the first side and a direction along the second side, penetrate the fin group, and are repeatedly attached to the fin group. The plurality of fin mounting portions mounted on the plate fins are configured as follows: between the first fin mounting portions adjacent to the first direction, a second fin mounting portion adjacent to the first fin mounting portion is located along the plate surface of the plate fin in a direction orthogonal to the first direction.

The foregoing and further products, features and advantages of the present disclosure will be more fully apparent from the accompanying drawings and the following description of the preferred embodiments.

Drawings

Fig. 1 is a perspective view showing an example of the structure of a heat exchanger according to an embodiment;

FIG. 2 is a schematic explanatory view of the heat exchanger of FIG. 1 viewed from the longitudinal direction;

FIG. 3 is an explanatory view as seen from a central axis of the fin mounting portion;

fig. 4 is an enlarged view of a main portion of fig. 3;

fig. 5 is a perspective view of a main portion of fig. 4;

fig. 6 is a schematic explanatory diagram showing a use example of the heat exchanger according to the embodiment.

Detailed Description

First, a configuration example of the technology according to the present disclosure will be described. The heat exchanger according to the first aspect of the present disclosure includes: a fin group; and a tube group penetrating the fin group and mounted on the fin group, wherein the tube group exchanges heat between a heat exchange medium flowing inside and air for air conditioning; the fin group includes a plurality of plate fins having a flat plate shape in which an inner angle of a first corner of a plurality of corners is a polygon having an acute angle, the plurality of plate fins being arranged so as to overlap each other with a plate surface across a gap through which the air for air conditioning passes, and being arranged so that the air for air conditioning flows in a first direction along either one of a first side or a second side forming the first corner; the tube group includes a plurality of heat conductive tubes that meander in a manner transverse to the first direction and extend in the first direction; the heat transfer tube includes a plurality of fin attachment portions that are disposed at intervals in a direction along the first side and a direction along the second side, penetrate the fin group, and are repeatedly attached to the fin group. The plurality of fin mounting portions mounted on the plate fin are arranged in a manner that second fin mounting portions are positioned between first fin mounting portions adjacent to the first direction, the second fin mounting portions being adjacent to the first fin mounting portions (5) along the plate surface of the plate fin in a direction orthogonal to the first direction.

According to the first aspect, the heat exchanger according to the present disclosure enlarges the flow path width through which air for air conditioning passes, and reduces the airflow resistance, that is, the pressure loss, as compared with the comparative example of the heat exchanger described below. The shape of the plate fins of the heat exchanger of the comparative example was rectangular and had the same structure and the same heat transfer or heat exchange capacity as the heat exchanger according to the present disclosure. Therefore, the heat exchanger according to the present disclosure may improve the heat exchange capacity by increasing one or both of the wind speed and the wind volume, and may also use the improved portion of the heat exchange capacity for downsizing.

The heat exchanger according to the present disclosure, which can increase one or both of the wind speed and the wind volume, is suitable for use in indoor spaces requiring strict temperature management, such as server rooms (servers), and can achieve an energy-saving effect and also can achieve space saving.

The heat exchanger according to the present disclosure can reduce its height. The air conditioner incorporating the heat exchanger can be made thin by reducing its height. Therefore, the air conditioner can be easily installed even in a narrow ceiling, and the dead space (dead space) can be effectively utilized without requiring a machine room. In addition, the air conditioner can ensure the descending gradient of the drainage pipe, does not need a drainage pump, and can reduce the cost.

The heat exchanger according to the present disclosure may increase the effective length of the heat transfer tube and the heat transfer area of the fins of the heat exchanger in order not to increase the loss pressure, although the height of the heat exchanger is reduced.

In the heat exchanger according to the second aspect of the present disclosure based on the first aspect, the plate fins may be arranged such that the first corner is located upstream in the first direction.

According to the second aspect, the heat exchanger can expand the flow path width of the air for air conditioning from the inlet into which the air for air conditioning flows to the inside, thereby reducing the pressure loss.

In the heat exchanger according to the third aspect of the present disclosure based on the first or second aspect, the plate fin may be quadrangular, and an inner angle of the second corner located opposite to the first corner in the plate fin may be an acute angle.

According to the third aspect, in the plate fin, the inner angle of the corner located upstream in the first direction and the inner angle of the corner located downstream in the first direction are acute angles. The plurality of plate fins are formed downstream with outlets for air conditioning air passing between the plurality of plate fins, the outlets extending in a direction diagonally intersecting the first direction. The discharged (drain) water generated during cooling can fall by gravity directly below the plate fins, and the air speed of the air for air conditioning can suppress the accumulation of the discharged (drain) water in the outlet from scattering outside the outlet.

In the heat exchanger according to the fourth aspect of the present disclosure based on any one of the first to third aspects, the inner angle of the corner portion having an acute angle may be 20 ° or more and 40 ° or less.

According to the fourth aspect, the inner angle of the corner portion having an acute angle is 20 ° or more, so that the length of the heat exchanger in the first direction can be prevented from becoming excessively long. Therefore, the installation space of the heat exchanger can be reduced. By setting the internal angle of the corner portion to 40 ° or less, the height of the heat exchanger in the direction perpendicular to the first direction can be prevented from becoming excessively high. Therefore, the air flow resistance of the heat exchanger can be reduced.

The heat exchanger according to the fifth aspect of the present disclosure may include at least one protrusion that guides and guides the flow of the air-conditioning air that moves along the outer periphery of the fin mounting portion so as to surround the outer periphery of the fin mounting portion, at a portion of the plate fin between the fin mounting portions adjacent to the second direction intersecting the first direction.

According to the fifth aspect, the air for air conditioning is guided by the protrusions and guided to flow in a meandering manner so as to surround the heat transfer pipe, so that the heat exchange efficiency of the air for air conditioning is improved.

In the heat exchanger according to the sixth aspect of the present disclosure based on the fifth aspect, the at least one protrusion may be formed integrally with the plate fin, and may be a cut-up bridge cut up from the plate fin bridge.

According to the sixth aspect, the protrusion may be formed by cutting up the plate fin. Therefore, for example, even when a plurality of projections need to be formed, the projections can be formed easily while maintaining the holding strength of the projections of the plate fins. Further, cost reduction for forming the protrusions can be achieved.

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

According to the seventh aspect, the air for air conditioning is guided and guided between the fin attachment portions adjacent to the second direction by the protrusions so as to flow through the gaps. Therefore, the air for air conditioning flows along the outer periphery of the fin mounting portion so as to surround the outer periphery of the fin mounting portion, and therefore the heat exchange efficiency of the air for air conditioning is improved.

In the heat exchanger according to the eighth aspect of the present disclosure based on any one of the fifth to seventh aspects, the at least one protrusion may have a strip shape extending in the second direction.

According to the eighth aspect, the protrusion captures air for air conditioning passing between the fin mounting portions adjacent to the second direction, and can efficiently guide the captured air for air conditioning to the two fin mounting portions.

In the heat exchanger according to the ninth aspect of the present disclosure according to any one of the fifth to eighth aspects, the at least one projection may include a plurality of the projections arranged in the first direction between the fin mounting portions adjacent to the second direction.

According to the ninth aspect, the plurality of protrusions are arranged between the fin mounting portions adjacent to the second direction from upstream to downstream of the flow of air for air conditioning. Therefore, the downstream-side protrusion guides and guides the bypass air of the air-conditioning air passing through the upstream-side protrusion. The guiding and guiding efficiency of the air for the air conditioner is improved.

In the heat exchanger according to the tenth aspect of the present disclosure based on the ninth aspect, the plurality of protrusions may have different lengths in a form that becomes longer as they go away from a line connecting the fin mounting portions adjacent to the second direction.

According to the tenth aspect, the plurality of protrusions have a length corresponding to the size of the gap between the fin mounting portions adjacent to the second direction. Therefore, the plurality of protrusions can effectively catch, guide and guide the air for air conditioning flowing between the fin mounting portions adjacent to the second direction.

In the heat exchanger according to the eleventh aspect of the present disclosure, the one end portions of the plurality of protrusions may be along one outer side Zhou Jiuwei of the fin mounting portion adjacent to the second direction, and the other end portions of the plurality of protrusions may be along the other outer side Zhou Jiuwei of the fin mounting portion adjacent to the second direction.

According to the eleventh aspect, gaps are formed between the fin mounting portions adjacent to the second direction and the plurality of protrusions along the shape of the outer periphery of the fin mounting portions. Accordingly, the flow of air for air conditioning flowing along the outer periphery of the fin mounting portion in such a manner as to surround the outer periphery of the fin mounting portion is effectively formed.

In the heat exchanger according to a twelfth aspect of the present disclosure based on any one of the first to eleventh aspects, the plurality of heat transfer pipes may have a cross section with an elliptical outer peripheral shape, and the plurality of heat transfer pipes may be arranged such that a major axis of the elliptical outer peripheral shape of the cross section is oriented along the first direction.

According to the twelfth aspect, since the outer peripheral shape of the cross section of the heat transfer pipe is elliptical, the pressure loss of the heat transfer pipe is small. Therefore, the heat exchanger according to the present disclosure is suitable for large temperature differentiation with a small amount of water, which is related to a reduction in pump power for the heat exchanger and a reduction in equipment cost for the heat exchanger.

In the heat exchanger according to the thirteenth aspect of the present disclosure, in any one of the first to twelfth aspects, the second fin mounting portions may be disposed at positions offset from the first fin mounting portions in a direction orthogonal to the first direction and between the first fin mounting portions in the first direction.

According to the thirteenth aspect, the first fin mounting portions and the second fin mounting portions are arranged alternately with respect to the first direction. The air for air conditioning passing through the heat exchanger is swirled by changing the flow direction of the air for air conditioning in the first fin mounting portion and the second fin mounting portion, and is allowed to exchange heat by being in effective contact with the heat transfer pipe and the plate fin. In addition, the serpentine flow path of the air for air conditioning may have a wide flow path width. Therefore, the heat exchange efficiency improves.

Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings. The embodiments described below are all examples showing general or specific aspects. Among the constituent elements in the following embodiments, the constituent elements not described in the independent claims indicating the uppermost concept may be described as arbitrary constituent elements. The drawings in the accompanying specification are schematic and are not necessarily strictly illustrated. In the drawings, substantially the same constituent elements are denoted by the same reference numerals, and description thereof may be omitted or omitted. In the present specification and claims, "device" may refer not only to one device but also to a system composed of a plurality of devices.

Fig. 1 to 5 show an example of a structure of a heat exchanger 100 according to an embodiment. Although not limited thereto, in the present embodiment, the heat exchanger 100 includes coil-shaped heat transfer tubes, which are also called coil-type heat exchangers. As shown in fig. 1, the heat exchanger 100 includes a heat exchange coil 101 as a structure including a fin group 1 and a tube group 2.

The air-conditioning air flow flows in a first direction F, which is an air flow direction, is supplied to the heat exchanger 100, and passes through the heat exchanger 100. The first direction F is indicated by the thick dashed arrow. The tube group 2 penetrates the fin group 1 and is attached to the fin group 1. The heat exchange medium M flows inside the tube group 2, specifically, inside the plurality of heat transfer tubes 4 included in the tube group 2. The heat exchange medium M exchanges heat with air for air conditioning by the heat transfer pipe 4 or the like, and can bring the air for air conditioning to a temperature suitable for air conditioning.

The technology of the present disclosure can be applied to a structure in which a heat exchange medium of cold water or warm water exchanges heat with air for air conditioning, a structure in which a heat exchange medium of a refrigerant such as freon exchanges heat with air for air conditioning, and a structure in which other heat exchange media exchange heat with air for air conditioning. An example of application of the structure in which cold water or warm water exchanges heat with air for an air conditioner is shown.

The fin group 1 includes a combination of a plurality of plate fins 3. The plate fin 3 has a flat plate shape. In the present embodiment, the planar shape and the planar dimensions of the plurality of plate fins 3 are the same as each other, but may be different from each other. The heat exchange coil 101 comprising a plurality of plate fins 3 and tube groups 2 is also referred to as a plate fin coil, and the heat exchanger 100 is also referred to as a plate fin coil heat exchanger.

Although not limited thereto, in the present embodiment, the planar shape of the flat plate of the plate fin 3 is quadrangular. The inner angle of more than one corner of four corners of the quadrangle of the plate fin 3 is an acute angle. For example, at least the corner located most upstream in the first direction F among the four corners of the plate fin 3 may be an acute angle. For example, at least the corner located most downstream in the first direction F among the four corners of the plate fin 3 may be an acute angle.

In the present embodiment, in the plate fin 3, the inner angles of the two

corner portions

3A and 3B located at positions facing each other are acute angles. The corner 3A is located furthest upstream in the first direction F and the corner 3B is located furthest downstream in the first direction F. The plate fin 3 has a parallelogram flat plate shape, and the inner angles of the

corners

3A and 3B may be the same. In the illustrated example, the plate fins 3 are in the shape of parallelograms of flat plates.

In the present description and claims, "parallelogram" may include: the diagonal angles of each of the two sets of diagonal angles are the same quadrangle as each other; the diagonal angles in one of the two sets of diagonal angles are different from each other but are substantially regarded as quadrangles of a parallelogram; the diagonal angles in the two sets of two diagonal angles are different from each other but are essentially considered to be quadrangles of a parallelogram. "parallelogram" also includes a diamond shape. The states in which the plurality of shapes are identical to each other may include a state in which the plurality of shapes are identical to each other and a state in which the plurality of shapes are regarded as being substantially identical to each other. The plurality of states in which the sizes are identical to each other may include a state in which the sizes are identical to each other and a state in which the sizes are considered to be substantially identical to each other. "parallel" may include a state that is perfectly parallel and a state that is considered substantially parallel. "perpendicular" or "orthogonal" may include a state that is entirely perpendicular or orthogonal and a state that is considered substantially perpendicular or orthogonal.

In the plate fin 3, the inner angle θ of the acute angle corner may be 20 ° or more and 40 ° or less, and may preferably be about 30 °. For example, in the parallelogram-shaped plate fin 3, the internal angle θ of the

acute angle corners

3A and 3B is 20 ° to 40 °, preferably about 30 °. An angle of about 30 ° may include an angle of 30 ° and an angle considered to be substantially 30 °. For example, an angle having a difference within ±1% with respect to 30 ° may be regarded as substantially 30 °.

The plurality of plate fins 3 are disposed opposite to each other with a gap between adjacent plate fins 3 through which air for air conditioning passes, so that the adjacent plate fins 3 and the plate surfaces 3a of the adjacent plate fins are opposed to each other. For example, the plate surface 3a is a main surface of a flat plate of the plate fin 3. The plurality of plate fins 3 are arranged such that the plate surfaces 3a overlap each other when viewed from a third direction D3, which is a direction in which the plurality of plate fins 3 are arranged. The plurality of plate fins 3 are arranged in a row in the third direction D3. Since the planar shape and planar dimensions of the plurality of plate fins 3 are identical to each other, the plate surfaces 3a of the plurality of plate fins 3 can be hidden by the plate surfaces 3a of the adjacent plate fins 3, respectively. In the present embodiment, the third direction D3 is a direction perpendicular to the plate surface 3a.

For example, the plurality of fin 3 are combined such that air for air conditioning flows in the first direction F along either the first side direction a or the second side direction B, the first side direction a being along the first side 3aa of the plate surface 3a, and the second side direction B being along the second side 3ab of the plate surface 3a. The second side 3ab is adjacent to the first side 3aa in the acute angle corner 3A of the plate surface 3A. The first side 3aa and the second side 3ab form an acute angle portion 3A. In the example of fig. 1, the first direction F is a direction along the first side direction a, and the second side direction B is an example of the second direction D2. In the case where the plate fin 3 has a parallelogram shape, the first side direction a is a short side direction along the short side of the plate surface 3a, and the second side direction B is a long side direction along the long side of the plate surface 3a.

Here, it is considered to change the case of the structure of the heat exchanger 100 according to the present embodiment while maintaining the heat exchange capacity of the heat exchanger equally before and after the change of the structure. The heat exchanger 100 according to the present embodiment includes a plurality of plate fins 3 having an internal angle θ of 20 ° to 40 ° inclusive of the

sharp corners

3A and 3B.

For example, when the structure of the heat exchanger 100 is changed such that the inner angle θ of the

acute angle corners

3A and 3B of the plurality of plate fins 3 is smaller than 20 °, the dimension of the first direction F of the heat exchanger after the structure change needs to be made longer than before the structure change. Therefore, the installation space of the heat exchanger after the structural change is required to be larger than that before the structural change.

For example, when the structure of the heat exchanger 100 is changed so that the inner angle θ of the

acute angle corners

3A and 3B of the plurality of plate fins 3 is greater than 40 °, the heat exchanger after the structure change needs to be higher than before the structure change. Therefore, the airflow resistance of the heat exchanger after the structure change is larger than that before the structure change.

The air outlet 7 for air conditioning is arranged on the side of the fin group 1. For example, the air outlet 7 for air conditioning is set or formed on either one of the side 1a of the fin group 1 arranged on the third side 3ac of the plate fin 3 or the side 1b of the fin group 1 arranged on the fourth side 3ad of the plate fin 3. The third side 3ac is a side of the plate surface 3a facing the first side 3 aa. The fourth side 3ad is a side of the plate surface 3a facing the second side 3ab. In the present embodiment, the air-conditioning air outlet 7 is provided in the side portion 1b. The air outlet 7 for air conditioning is inclined so as to descend from the upstream toward the downstream in the first direction F. The fin group 1 can make the discharged water generated during cooling fall down by gravity through the space between the plate fins 3, and can prevent the discharged water from accumulating in the air outlet 7 for air conditioning by the wind speed of the air for air conditioning. This prevents the discharged water from scattering.

As shown in fig. 2, the tube group 2 includes a plurality of heat conductive tubes 4 meandering in a form crossing the first direction F and extending in the first direction F. The inlet and outlet of the heat exchange medium M of the tube group 2 are connected to respective headers 13. That is, the inlets and outlets of the heat exchange medium M of the plurality of heat transfer tubes 4 are connected to different headers 13. The heat pipe 4 includes a plurality of fin mounting portions 5 penetrating the plurality of plate fins 3 of the fin group 1 and mounted on the plurality of plate fins 3. In the fin mounting portion 5, the heat pipe 4 penetrates the plate fin 3 and is mounted to the plate fin 3. The plate fin 3 includes a plurality of through holes through which the heat transfer pipes 4 pass. The heat pipe 4 is repeatedly attached to the plurality of plate fins 3 of the fin group 1 through the plurality of plate fins 3 in the plurality of fin attachment portions 5 arranged at intervals in the first side direction a and the second side direction B.

As shown in fig. 3 and 4, the heat transfer pipe 4 may have a cross section with an elliptical outer peripheral shape. The heat transfer pipe 4 may be arranged on the plate fin 3 such that the major axis LA of the oval shape of the cross section is oriented along the first direction. That is, the major axis of the oval outer periphery of the cross section of the fin mounting portion 5 is along the first direction F. The plurality of fin mounting portions 5 of the plate fin 3 are arranged such that, between the

fin mounting portions

5a and 5b adjacent to the first direction F, the fin mounting portions 5c adjacent to the

fin mounting portions

5a and 5b are located in a direction along the plate surface 3a of the plate fin 3 and orthogonal to the first direction F. The fin mounting portion 5c is offset from the

fin mounting portions

5a and 5b in a direction orthogonal to the first direction F along the plate surface 3a between the

fin mounting portions

5a and 5 b. Thereby, the flow path width L through which the air for air conditioning passes is enlarged.

For example, regarding the flow path width L around the

fin mounting portions

5a, 5b, and 5c, there are a first case having the flow path width L between the

fin mounting portions

5a and 5c in the direction in which the

fin mounting portions

5a and 5c are arranged, and a second case having the flow path width L between the

fin mounting portions

5b and 5c in the direction in which the

fin mounting portions

5b and 5c are arranged. The flow path width L of the first housing is larger than the width between the

fin mounting portions

5a and 5c in the direction perpendicular to the first direction F, and the flow path width L of the second housing is larger than the width between the

fin mounting portions

5b and 5c in the direction perpendicular to the first direction F. In this way, by the synergistic effect of the outer peripheral shape of the cross section of the heat transfer pipe 4 and the arrangement of the fin mounting portions 5, the airflow resistance to which the air for air conditioning is subjected is greatly reduced.

As shown in fig. 4 and 5, the plate fin 3 includes one or more protrusions 6 at a portion of the plate fin 3 between the fin mounting portions 5 adjacent to the second direction D2, and the second direction D2 is a direction intersecting the first direction F, and includes a plurality of protrusions 6 in the present embodiment. Although not limited thereto, in the present embodiment, the second direction D2 is a direction along the second side direction B. The one or more protrusions 6 have the following shape and arrangement between the two fin mounting portions 5: the air flow of the air for air conditioning, which moves along the outer circumferences of the two fin mounting portions 5 so as to surround the outer circumferences of the two fin mounting portions 5, is guided and guided.

Although not limited thereto, in the present embodiment, the plurality of projections 6 are belt-like projections extending in a direction intersecting the first direction F. For example, the plurality of projections 6 extend in a direction from one of the two fin mounting portions 5 toward the other. The plurality of protrusions 6 may also extend in the second direction D2. The plurality of protrusions 6 are aligned in the first direction F. The plurality of projections 6 are linear belt-shaped projections, but may be non-linear belt-shaped projections. The plurality of linear protrusions 6 are arranged parallel to each other, but may be non-parallel to each other.

Gaps exist between the two fin mounting portions 5 adjacent to the plurality of projections 6 and the plurality of projections 6. The plurality of protrusions 6 between the two fin mounting portions 5 may have different lengths. For example, the length of the plurality of protrusions 6 may also be varied as follows: as it goes away from the line connecting the two fin mounting portions 5, it becomes longer. The line may be a line connecting the centers of the two fin mounting portions 5. For example, the length of the plurality of protrusions 6 may also be varied as follows: one end of the plurality of protrusions 6 is along an outer Zhou Jiuwei of the cross section of one fin mounting portion 5, and the other end of the plurality of protrusions 6 is along an outer Zhou Jiuwei of the cross section of the other fin mounting portion 5.

The plurality of protrusions 6 as described above meanders the air flow of the air for air conditioning, increasing the contact distance between the air for air conditioning and the plate fins 3 and the heat transfer tubes 4, that is, increasing the amount of heat transfer therebetween. The plurality of protrusions 6 reduce bypass air that passes between the two fin mounting portions 5 in a straight line from air for air conditioning.

The protrusion 6 may be integral with the plate fin 3 or may be separate. In the present embodiment, the protrusion 6 is integral with the plate fin 3. The protrusion 6 may be formed of the same material as the plate fin 3, or may be formed of a part of the plate fin 3. In the present embodiment, the protrusion 6 is a cut-and-raised bridge formed by processing the plate fin 3. Hereinafter, the "protrusion 6" is sometimes referred to as "cut-and-raised bridge 6". The cut-up bridge 6 may be formed by cutting a portion of the plate fin 3 into a bridge shape and by a cut-up process. The planar shape of the cut-up bridge 6 is not particularly limited, and may be quadrangular. Four sides of the quadrangle of the cut-up bridge 6 may be parallel to more than one of the four sides 3aa, 3ab, 3ac and 3ad of the plate surface 3a of the plate fin 3.

The planar shape of the cut-up bridge 6 may be the same as the plate fin 3 or may be a parallelogram. At this time, each side of the parallelogram of the cut-up bridge 6 may be parallel to each side of the panel surface 3a.

For example, the parallelogram cut-and-raised bridge 6 is formed as follows: the plate-fin 3 is cut at two long sides of the parallelogram along the second side direction B, and a part of the plate-fin 3 is raised in the vertical direction of the plate surface 3a with the two short sides along the first side direction a as folding lines. Thus, the cut-up bridge 6 has a bridge-like shape that opens in the first direction F at the side portion in the second side direction B. The end portion of the fold line portion as the cut-up bridge 6 is located at a position along the outer peripheral surface of the elliptical cross section having the fin mounting portion 5.

Fig. 6 shows an example of using the heat exchanger 100 according to the embodiment for the air conditioner 8. The air conditioner 8 includes: a heat exchange unit 9 for exchanging heat with air for air conditioning, a blower unit 11 incorporating a blower 10 for passing the heat exchange unit 9 through the air for air conditioning and supplying the air for air conditioning to the indoor space IS, and a blower duct 12. The heat exchange unit 9 includes a heat exchanger 100. The heat exchange unit 9, the blower unit 11, the indoor space IS, and an indoor/outdoor space not shown in the drawings are connected to each other by a blower duct 12. For example, the air duct 12 connects the heat exchange unit 9 and the air unit 11 to each other. The heat exchange unit 9 exchanges heat with air for air conditioning supplied by the blower unit 11. The air conditioner 8 supplies the air-conditioning air after the heat exchange in the heat exchange unit 9 to the indoor space IS. For example, the heat exchange unit 9 and the blower unit 11 are installed in a space inside the ceiling S of various buildings such as an office building. The air conditioner 8 may have a structure in which the heat exchange unit 9 and the blower unit 11 are integrated, or may have a structure in which the heat exchange unit 9 and the blower unit 11 are independently included.

The embodiments of the present disclosure have been described above, but the present disclosure is not limited to the above-described embodiments. That is, various modifications and improvements may be made within the scope of the disclosure. For example, various modifications applied to the embodiments and configurations in which the constituent elements in the different embodiments are combined are included in the scope of the present disclosure.

For example, in the heat exchanger 100 according to the embodiment, the air-conditioning air outlet 7 may be inclined so as to descend from the downstream side toward the upstream side in the first direction F.

For example, in the heat exchanger 100 according to the embodiment, the outer peripheral shape of the cross section of the fin mounting portion 5 of the heat transfer tube 4 of the tube group 2 can be freely made to be a shape other than an oval shape.

In the heat exchanger 100 according to the embodiment, the planar shape of the plate fins 3 is a quadrangle, but the shape is not limited thereto, and may be a triangle, or a polygon having 5 or more corners.

In the heat exchanger 100 according to the embodiment, the planar shape of the plate fin 3 is a quadrangle in which the inner angles of the two

corner portions

3A and 3B facing each other are acute angles, but is not limited thereto. For example, one inner angle of the

corners

3A and 3B may be an acute angle, and the inner 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.

The numbers, amounts, etc. used herein are all exemplified for the purpose of specifically explaining the techniques of the present disclosure, and the present disclosure is not limited to the exemplified numbers. The connection relationship between the constituent elements is exemplified for the purpose of specifically explaining the technology of the present disclosure, and the connection relationship for realizing the functions of the present disclosure is not limited thereto.

The present disclosure is not limited to the embodiments and modifications described above, and the scope of the present disclosure is defined by the appended claims rather than the description of the specification, as long as the present disclosure can be implemented in various forms without departing from the essential characteristics thereof. It is intended that all modifications within the claims and their scope or equivalents be covered by the claims and their scope.

Symbol description:

1 fin group

2 tube group

3 plate fin

3A first corner

3B second corner

3a plate surface

3aa first side

3ab second side

4 heat conduction pipe

5 fin mounting portion

6 protruding and cutting bridge

100 heat exchanger

A first side direction

B second side direction

D2 second direction

F air flow direction, first direction

The theta inner angle.

Claims

1. A heat exchanger (100) is characterized in that,

the device is provided with: a fin group (1); and a tube group (2) penetrating the fin group (1) and attached to the fin group (1) and exchanging heat between a heat exchange medium flowing inside and air for air conditioning;

the fin group (1) includes a plurality of plate fins (3), wherein the plurality of plate fins (3) are flat plates in which an inner angle (θ) of a first corner (3A) among the plurality of corners is an acute angle, the plurality of plate fins (3) are arranged so as to overlap each other with a plate surface (3A) thereof interposed therebetween, and the air for air conditioning flows in a first direction (F) along either one of a first side (3 aa) or a second side (3 ab) forming the first corner (3A);

the tube group (2) comprises a plurality of heat-conducting tubes (4) which meander transversely to the first direction and extend in the first direction (F);

the heat transfer tube (4) comprises a plurality of fin mounting portions (5), and the plurality of fin mounting portions (5) are arranged at intervals in a direction (A) along the first side (3 aa) and in a direction (B) along the second side (3 ab), penetrate the fin group (1), and are repeatedly mounted on the fin group (1);

the plurality of fin mounting portions (5) mounted on the plate fin (3) are arranged in a manner that second fin mounting portions (5) are positioned between first fin mounting portions (5) adjacent to the first direction (F), the second fin mounting portions (5) being adjacent to the first fin mounting portions (5) along the plate surface (3 a) of the plate fin (3) in a direction orthogonal to the first direction (F).

2. The heat exchanger (100) of claim 1, wherein,

the plate fin (3) is arranged in such a manner that the first corner (3A) is located upstream of the first direction (F).

3. The heat exchanger (100) of claim 1, wherein,

the plate fins (3) are quadrilateral;

in the plate fin (3), an inner angle (θ) of a second corner (3B) located at a position opposite to the first corner (3A) is an acute angle.

4. The heat exchanger (100) of claim 1, wherein,

the internal angle (θ) of the corner portion of the sharp shape is 20 DEG to 40 deg.

5. The heat exchanger (100) according to any one of claims 1 to 4, wherein,

at least one protrusion (6) is provided at a portion of the plate fin (3) between the fin mounting portions (5) adjacent to the second direction intersecting the first direction (F), and the protrusion (6) guides and guides the air flow of the air for air conditioning that moves along the outer periphery of the fin mounting portions (5) in a manner of surrounding the outer peripheral surface of the fin mounting portions (5).

6. The heat exchanger (100) of claim 5, wherein the heat exchanger is configured to heat the heat exchanger,

the at least one protrusion (6) is integral with the plate fin (3) and is a cut-and-raised bridge cut from the plate fin (3).

7. A heat exchanger according to claim 5 wherein,

a gap is provided between the at least one projection (6) and the fin mounting portion (5) adjacent to the second direction.

8. The heat exchanger (100) of claim 5, wherein the heat exchanger is configured to heat the heat exchanger,

the at least one protrusion (6) has a band-like shape extending in the second direction.

9. The heat exchanger (100) of claim 5, wherein the heat exchanger is configured to heat the heat exchanger,

the at least one projection (6) includes a plurality of the projections (6) between the fin mounting portions (5) adjacent to the second direction;

the plurality of protrusions (6) are arranged in the first direction (F).

10. The heat exchanger (100) of claim 9, wherein the heat exchanger is configured to provide heat to the heat exchanger,

the plurality of projections (6) have different lengths as they are longer apart from a line connecting the fin mounting portions (5) adjacent to the second direction.

11. The heat exchanger (100) of claim 9, wherein the heat exchanger is configured to provide heat to the heat exchanger,

one end of the plurality of protrusions (6) is located along one outer periphery of the fin mounting portion (5) adjacent to the second direction;

the other end portions of the plurality of protrusions (6) are located along the other outer periphery of the fin mounting portion (5) adjacent to the second direction.

12. The heat exchanger (100) of claim 1, wherein,

the plurality of heat pipes (4) include a cross section with an oval outer peripheral shape;

the plurality of heat pipes (4) are arranged such that the oval long axis surface of the cross section is oriented along the first direction (F).

13. The heat exchanger (100) of claim 1, wherein,

in the plate fin (3), the second fin mounting portions (5) are disposed at positions offset from the first fin mounting portions (5) in a direction orthogonal to the first direction (F), and at positions between the first fin mounting portions (5) in the first direction (F).