Heat Exchanger

Abstract

The header (24) includes: a first component (40) including a main wall portion (41) formed with a through hole (42) for one end of the heat transfer tube in the longitudinal direction to pass through; a second component (50) constituting an insertion space (70) communicating with the one end of the heat transfer tube in the longitudinal direction; and a third component (60) facing the one end of the heat transfer tube in the longitudinal direction in a state where the through hole (42) has been passed through. The second component (50) includes: a pair of side plates (51) surrounding the insertion space (70) in the width direction of the header, and a partition plate (52) connected to each side plate (51) in a manner of partitioning the insertion space (70) from each other.

Description

Technical Field

[0001] The present disclosure relates to a heat exchanger. Background Art

[0002] In the past, a heat exchanger was used that included a header extending in a vertical direction and a plurality of flat tubes extending in a direction orthogonal to the length direction of the header and inserted into the header, so that heat exchange was performed between the refrigerant flowing in each flat tube and the air flowing on the outside of the flat tube.

[0003] Patent document 1 discloses that when flat tubes are arranged in multiple rows in an MCHX (microchannel heat exchanger), in order to realize a structure in which each section is separated in a header connecting the rows of flat tubes, a heat sink type component extruded in the wind direction (short side direction of the flat tube) is used as a component constituting an insertion space for the flat tubes. By joining the heat sink type component and a plate-shaped component into which the ends of the flat tubes are inserted to form a connecting header, the flat tubes can be inserted into the header in a manner that the ends of the flat tubes do not contact the inner wall of the header, thereby preventing the flat tubes from falling off during brazing or poor brazing of the holes of the flat multi-hole tubes.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Publication No. 2016-95086 Summary of the invention

[0007] -Technical problem to be solved by the invention-

[0008] However, in the heat exchanger disclosed in Patent Document 1, when the header is connected by riveting claws extending from both ends of the header in the width direction of the plate-shaped member in the length direction of the flat tube to the back of the heat sink-shaped member, warping (bending) occurs in the heat sink-shaped member. As a result, since a gap is generated between the heat sink-shaped member and the plate-shaped member, it is difficult to achieve a structure in which each section of the flat tube is separated.

[0009] An object of the present disclosure is to provide a header structure of a heat exchanger in which a gap is unlikely to be generated between a member constituting an insertion space for a heat transfer tube and a member into which an end portion of the heat transfer tube is inserted.

[0010] -Technical solutions to solve technical problems-

[0011] A first aspect of the present disclosure is a heat exchanger, comprising a plurality of heat transfer tubes 13 arranged in multiple sections along a specified direction and headers 21, 24 for holding one end of the plurality of heat transfer tubes 13 in the longitudinal direction, characterized in that the headers 21, 24 comprise: a first component 40, 110, the first component 40, 110 comprising a main wall portion 41, 111, a plurality of through holes 42, 112 for passing through one end of the plurality of heat transfer tubes 13 in the longitudinal direction are formed in the main wall portion 41, 111; a second component 50, 120, the second component 50, 120 constituting a plurality of insertion spaces 70 communicating with one end of the plurality of heat transfer tubes 13 in the longitudinal direction , 160; and a third component 60, 130, the third component 60, 130 is opposite to one end portion in the length direction of the plurality of the heat transfer tubes 13 in a state where the plurality of the through holes 42, 112 have been penetrated, the second component 50, 120 includes: a pair of side plates 51, 121, a pair of the side plates 51, 121 surround the plurality of the insertion spaces 70, 160 from the width direction of the headers 21, 24; and at least one partition plate 52, 122, at least one of the partition plates 52, 122 is connected to each of the side plates 51, 121 in a pair of the side plates 51, 121 in a manner that separates the plurality of the insertion spaces 70, 160 from each other.

[0012] In the first aspect, in the second component 50, 120 constituting the insertion space 70, 160, the partitions 52, 122 are supported by the side plates 51, 121 from both sides of the headers 21, 24, so that a gap is not easily generated between the first component 40, 110 and the second component 50, 120 into which the end of the heat transfer tube 13 is inserted.

[0013] A second aspect of the present disclosure is based on the first aspect and is characterized in that: the pair of side plates 51 , 121 and the partition plates 52 , 122 are formed integrally.

[0014] In the second aspect, the second component 50, 120 is more difficult to deform.

[0015] The third aspect of the present disclosure is, based on the first or second aspect, characterized in that: the third component 60 blocks the side of the multiple insertion spaces 70 opposite to the main wall portion 41, and each of the multiple insertion spaces 70 is connected to an end portion in the length direction of at least two or more of the multiple heat transfer tubes 13.

[0016] In the third aspect, the header 24 can be provided as an inter-row refrigerant turn portion.

[0017] A fourth aspect of the present disclosure is, based on the third aspect, characterized in that the plurality of heat transfer tubes 13 are staggered and arranged in two or more rows in the width direction of the header 24 .

[0018] In the fourth aspect, heat exchange performance can be improved.

[0019] The fifth aspect of the present disclosure is that, based on the first or second aspect, it is characterized in that: the manifold 21 also includes a fourth component 140 arranged on the side of the third component 130 opposite to the multiple heat transfer tubes 13 and constituting a main flow path 142, and a plurality of holes 132 are provided on the third component 130 to connect each of the multiple insertion spaces 160 with the main flow path 142.

[0020] In the fifth aspect, the header (21) can be used as a refrigerant inflow portion or a refrigerant outflow portion.

[0021] The sixth aspect of the present disclosure is, based on any one of the first to fifth aspects, characterized in that the heat exchanger also includes a pair of outer plates 43, 113, and the pair of outer plates 43, 113 respectively cover the pair of side plates 51, 121 from the outside of the headers 21, 24 in the width direction.

[0022] In the sixth aspect, the second member 50, 120 is more difficult to deform.

[0023] A seventh aspect of the present disclosure is based on the sixth aspect and is characterized in that a caulking claw 44 , 114 is provided on each of the pair of outer plates 43 , 113 .

[0024] In the seventh aspect, the components can be caulked using the caulking claws 44 , 114 provided on the outer plates 43 , 113 .

[0025] An eighth aspect of the present disclosure is, based on the sixth or seventh aspect, characterized in that: the pair of outer plates 43 , 113 are formed integrally with the main wall portion 41 , 111 as a part of the first component 40 , 110 .

[0026] In the eighth aspect, the number of header components can be reduced.

[0027] A ninth aspect of the present disclosure is a heat exchanger, comprising a plurality of heat transfer tubes 13 arranged in multiple sections along a specified direction and headers 21, 24 for holding one end of the plurality of heat transfer tubes 13 in the longitudinal direction, characterized in that: the headers 21, 24 comprise: a first component 40, 110, the first component 40, 110 comprising a main wall portion 41, 111, a plurality of through holes 42, 112 for passing through one end of the plurality of heat transfer tubes 13 in the longitudinal direction are formed in the main wall portion 41, 111; a second component 50, 120, the second component 50, 120 constituting a plurality of insertion spaces 70, 160 communicating with one end of the plurality of heat transfer tubes 13 in the longitudinal direction; and a third component 60, 130, the third component 60, 130 is opposite to one end portion in the length direction of the plurality of heat transfer tubes 13 in a state where the plurality of through holes 42, 112 have been penetrated, and the second component 50, 120 includes: a side plate 51, 121, the side plate 51, 121 divides one side of the plurality of insertion spaces 70, 160 from the width direction of the header 21, 24; and at least one partition plate 52, 122, at least one of the partition plates 52, 122 is connected to the side plate 51, 121 in a manner of separating the plurality of insertion spaces 70, 160 from each other, and the heat exchanger also includes an outer plate 43, 113, the outer plate 43, 113 divides the other side of the plurality of insertion spaces 70, 160 from the width direction of the header 21, 24.

[0028] In the ninth aspect, the partition plates 52, 122 of the second members 50, 120 that partition the insertion spaces 70, 160 are supported from both sides of the headers 21, 24 by the side plates 51, 121 and the outer plates 43, 113 of the second members 50, 120. Therefore, since deformation when the members are caulked can be suppressed, a gap is unlikely to be generated between the first member 40, 110 into which the end of the heat transfer tube 13 is inserted and the second member 50, 120.

[0029] A tenth aspect of the present disclosure is, based on the ninth aspect, characterized in that: the side plates 51 , 121 and the partition plates 52 , 122 are formed integrally.

[0030] In the tenth aspect, the second member 50, 120 is more difficult to deform.

[0031] An eleventh aspect of the present disclosure is, based on any one of the first to tenth aspects, characterized in that each of the plurality of heat transfer tubes 13 is a flat tube.

[0032] In the eleventh aspect, the heat transfer area of ​​the heat transfer tube 13 can be increased, thereby improving the performance of the heat exchanger.

[0033] A twelfth aspect of the present disclosure is, based on any one of the first to eleventh aspects, characterized in that the second component 50, 120 is formed by joining a plurality of separately formed blocks 50a to 50d, 120a to 120d along the prescribed direction.

[0034] In the twelfth aspect, compared with the case where the entire second member 50, 120 is integrally formed, processing becomes easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a simplified structural diagram of a heat exchanger involved in an embodiment;

[0036] Figure 2 yes Figure 1 An enlarged view of a heat exchange portion of a heat exchanger shown;

[0037] Figure 3 yes Figure 1 An enlarged perspective view of the connecting header of the heat exchanger shown;

[0038] Figure 4 yes Figure 1 An exploded perspective view of the connecting header of the heat exchanger shown;

[0039] Figure 5 yes Figure 1 A top cross-sectional view of a connecting header of a heat exchanger shown;

[0040] Figure 6 yes Figure 1 A longitudinal sectional view in the width direction of the connecting header of the heat exchanger shown;

[0041] Figure 7 yes Figure 1 An enlarged perspective view of the inlet and outlet headers of the heat exchanger is shown;

[0042] Figure 8 yes Figure 1 An exploded perspective view of the inlet and outlet headers of the heat exchanger shown;

[0043] Fig. 9 yes Figure 1 A top cross-sectional view of the inlet and outlet headers of the heat exchanger shown;

[0044] Fig.10 yes Figure 1 A longitudinal cross-sectional view in the width direction of the inlet and outlet headers of the heat exchanger shown;

[0045] Fig.11 is a top cross-sectional view of a connecting header according to a comparative example;

[0046] Fig.12is a longitudinal cross-sectional view in the width direction of a connecting header according to a comparative example;

[0047] Fig.13 is a longitudinal cross-sectional view in the length direction of the heat transfer tube of a member constituting an insertion space in a connecting header according to a comparative example;

[0048] Fig.14 is a longitudinal sectional view in the width direction of a connecting header according to a modified example;

[0049] Fig.15 is a longitudinal sectional view in the width direction of a connecting header according to a modified example;

[0050] Fig.16 is a longitudinal cross-sectional view in the width direction of a connecting header according to a modified example;

[0051] Fig.17 is a longitudinal sectional view in the width direction of a connecting header according to a modified example;

[0052] Fig.18 is a longitudinal sectional view in the width direction of a connecting header according to a modified example;

[0053] Fig.19 is a longitudinal sectional view in the width direction of a connecting header according to a modified example;

[0054] Fig. 20 is a longitudinal sectional view in the width direction of a connecting header according to a modified example;

[0055] Fig.21 is a longitudinal cross-sectional view in the width direction of an inlet and outlet header according to a modified example;

[0056] Fig. 22 is a perspective view of a second member for connecting headers according to a modified example;

[0057] Fig.23 It is a perspective view of a second member of the inlet and outlet header according to a modification. DETAILED DESCRIPTION

[0058] The following is a description of the embodiments of the present disclosure with reference to the accompanying drawings. It should be noted that the following embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its application objects or its use.

[0059] - Structure of heat exchanger -

[0060] Figure 1 is a schematic structural diagram of a heat exchanger 100 according to an embodiment. Figure 2 yes Figure 1 An enlarged view of a heat exchange portion of heat exchanger 100 is shown.

[0061] The heat exchanger 100 is a heat exchanger that uses air as a cooling source or a heating source to condense or evaporate a refrigerant, and is used, for example, as a heat exchanger constituting a refrigerant circuit of a vapor compression refrigeration device. As the refrigerant circulating in the refrigerant circuit, for example, a carbon dioxide refrigerant is used.

[0062] It should be noted that in the following description, unless otherwise specified, terms indicating directions or planes mean directions or planes based on a state in which the heat exchanger 100 as an outdoor heat exchanger is placed on an outdoor unit of an air conditioner.

[0063] like Figure 1 As shown, the heat exchanger 100 mainly includes: a heat exchange part 10 for performing heat exchange between outdoor air and refrigerant, a connecting header 24 provided at one end side (here, the left front end side) of the heat exchange part 10, a refrigerant manifold 20 provided at the other end side (here, the right end side) of the heat exchange part 10, an inlet and outlet header 21, and an intermediate header 22. In the heat exchanger 100, the refrigerant manifold 20, the inlet and outlet header 21, the intermediate header 22, the connecting header 24, and the heat exchange part 10 are made of, for example, aluminum or an aluminum alloy, and the joining of the parts is performed by brazing such as furnace brazing.

[0064] The heat exchanger 10 includes a windward heat exchanger 11 constituting the windward portion of the heat exchanger 100 and a downwind heat exchanger 12 constituting the downwind portion of the heat exchanger 100. In the heat exchanger 10, a plurality of rows (for example, two rows) of heat exchangers 11 and 12 are arranged adjacent to each other in the direction of passage of outdoor air (tube row direction) generated by the driving of an outdoor fan (not shown). That is, the portion of the heat exchanger 10 located on the windward side relative to the direction of passage of outdoor air is the windward heat exchanger 11, and the portion located on the downwind side relative to the windward heat exchanger 11 is the downwind heat exchanger 12. The windward heat exchanger 11 includes a windward main heat exchanger 11a constituting the upper portion of the heat exchanger 100 and a windward auxiliary heat exchanger 11b constituting the lower portion of the heat exchanger 100. The downwind heat exchange section 12 includes a downwind main heat exchange section 12 a constituting an upper portion of the heat exchanger 100 , and a downwind auxiliary heat exchange section 12 b constituting a lower portion of the heat exchanger 100 .

[0065] like Figure 2 As shown, the heat exchange unit 10 is composed of a plurality of heat transfer tubes 13 and a plurality of heat transfer fins 16, wherein the plurality of heat transfer tubes 13 are, for example, flat tubes, and the plurality of heat transfer fins 16 are, for example, inserted fins.

[0066] The heat transfer tube 13 is made of, for example, aluminum or aluminum alloy, and is a flat multi-hole tube having a flat surface 14 that serves as a heat transfer surface and a plurality of small internal flow paths 15 through which the refrigerant flows. The plurality of heat transfer tubes 13 are arranged in a plurality of stages at intervals along a predetermined pipe section direction with the flat surfaces 14 facing each other. In addition, the plurality of heat transfer tubes 13 are arranged in a plurality of rows (for example, two rows) in a staggered manner along a pipe row direction (here, the direction in which outdoor air passes) that intersects the pipe section direction and the length direction of the heat transfer tube 13. One end (here, the left front end) of each heat transfer tube 13 in the length direction is connected to the connecting header 24, and the other end (here, the right end) of each heat transfer tube 13 in the length direction is connected to the inlet and outlet header 21 or the intermediate header 22. That is, the plurality of heat transfer tubes 13 are arranged in a plurality of stages and rows, and are arranged between the inlet and outlet headers 21 and the intermediate header 22 and the connecting header 24. Here, since the flat surface 14 of the heat transfer tube 13 faces the vertical direction, the tube section direction means the vertical direction, and the longitudinal direction of the heat transfer tube 13 means the horizontal direction.

[0067] The heat transfer fins 16 are made of aluminum or aluminum alloy, for example, and a plurality of heat transfer fins 16 are arranged at intervals along the length direction of the heat transfer tube 13. The heat transfer fins 16 are formed with a plurality of notches 17 extending along the tube segment direction and the tube row direction intersecting the length direction of the heat transfer tube 13, and the heat transfer tube 13 is inserted and held in the notches 17. Here, the tube segment direction is a vertical direction, and the length direction of the heat transfer tube 13 is a horizontal direction, so the tube row direction means a horizontal direction intersecting the length direction of the heat transfer tube 13, which is consistent with the passing direction of the outdoor air. The notch 17 extends slenderly in the horizontal direction from one edge of the heat transfer fin 16 in the tube row direction (here, the edge on the windward side relative to the passing direction of the outdoor air).

[0068] The plurality of heat transfer tubes 13 are divided into a heat transfer tube group constituting the windward main heat exchange section 11a, a heat transfer tube group constituting the windward auxiliary heat exchange section 11b, a heat transfer tube group constituting the downwind main heat exchange section 12a, and a heat transfer tube group constituting the downwind auxiliary heat exchange section 12b. In addition, the plurality of heat transfer fins 16 are divided into a fin group constituting a windward row common to the windward main heat exchange section 11a and the windward auxiliary heat exchange section 11b, and a fin group constituting a downwind row common to the downwind main heat exchange section 12a and the downwind auxiliary heat exchange section 12b.

[0069] It should be noted that the heat exchange unit 10 is not limited to the inserted fin type heat exchanger using inserted fins as the heat transfer fins 16 as described above, and may also be a corrugated fin type heat exchanger using a large number of corrugated fins as the heat transfer fins 16 .

[0070] Refrigerant flow divider 20 (see Figure 1) is connected between the liquid refrigerant pipe 31 and the lower part of the inlet and outlet header 21. The refrigerant splitter 20 is a component made of, for example, aluminum or aluminum alloy and extending in the vertical direction (pipe section direction). The refrigerant splitter 20 splits the refrigerant flowing in through the liquid refrigerant pipe 31 and guides it to the lower part of the inlet and outlet header 21, or merges the refrigerant flowing in through the lower part of the inlet and outlet header 21 and guides it to the liquid refrigerant pipe 31.

[0071] The inlet and outlet header 21 is provided at the other end side (here, the right end side) of the windward heat exchange section 11 in the heat exchange section 10. The other end (here, the right end) of the heat transfer tube 13 (flat tube) constituting the windward heat exchange section 11 in the longitudinal direction is connected to the inlet and outlet header 21. The inlet and outlet header 21 is a member made of, for example, aluminum or aluminum alloy and extending in the vertical direction (pipe section direction). The internal space of the inlet and outlet header 21 is divided into upper and lower parts by a baffle (not shown), and the upper space is connected to the other end (here, the right end) of the heat transfer tube 13 constituting the windward main heat exchange section 11a, and the lower space is connected to the other end (here, the right end) of the heat transfer tube 13 constituting the windward auxiliary heat exchange section 11b. A gas refrigerant pipe 32 is connected to the upper part of the inlet and outlet header 21, and the refrigerant can flow between the windward main heat exchange section 11a and the gas refrigerant pipe 32. A refrigerant flow divider 20 is connected to a lower portion of the inlet and outlet header 21 , and the refrigerant can flow between the windward-side sub-heat exchange portion 11 b and the refrigerant flow divider 20 .

[0072] The intermediate header 22 is arranged at the other end side (here, the right end side) of the downwind heat exchange section 12 in the heat exchange section 10. The other end (here, the right end) of the heat transfer tube 13 constituting the downwind heat exchange section 12 is connected to the intermediate header 22. The intermediate header 22 is a component extending in the vertical direction (pipe section direction) formed of, for example, aluminum or aluminum alloy. The internal space of the intermediate header 22 is divided into upper and lower parts by a baffle (not shown), and the upper space is connected to the other end (here, the right end) of the heat transfer tube 13 constituting the downwind main heat exchange section 12a, and the lower space is connected to the other end (here, the right end) of the heat transfer tube 13 constituting the downwind auxiliary heat exchange section 12b. The upper space and the lower space of the intermediate header 22 are divided into multiple spaces by a baffle (not shown) according to the number of passages of the heat exchange section 10, and the upper space is connected to the lower space through the intermediate connecting pipe 23 and the like. The intermediate header 22 allows the refrigerant to flow between the downwind main heat exchange portion 12 a and the downwind auxiliary heat exchange portion 12 b .

[0073] The connecting header 24 is provided at one end side (here, the left front end side) of the heat exchange section 10. One end (here, the left front end) of the heat transfer tube 13 constituting the heat exchange section 10 is connected to the connecting header 24. The connecting header 24 is a component made of, for example, aluminum or an aluminum alloy and extending in a vertical direction (pipe section direction). A connecting path is formed on the connecting header 24, and the connecting path is used to connect one end (here, the left front end) of the heat transfer tube 13 constituting the windward side heat exchange section 11 with one end (here, the left front end) of the heat transfer tube 13 constituting the downwind side heat exchange section 12. In this way, one end (here, the left front end) of the heat transfer tube 13 adjacent in the tube row direction in the longitudinal direction is connected to each other. That is, by using the connecting header 24, the refrigerant can flow between the windward side heat exchange section 11 and the downwind side heat exchange section 12.

[0074] When the heat exchanger 100 having the above structure functions as an evaporator of the refrigerant, Figure 1 As shown by the arrows indicating the flow of the refrigerant, the refrigerant flowing in from the liquid refrigerant pipe 31 passes through the refrigerant splitter 20 and the lower part of the inlet and outlet header 21, and is guided to the windward side auxiliary heat exchange section 11b. The refrigerant that has passed through the windward side auxiliary heat exchange section 11b passes through the lower part of the connecting header 24 and is guided to the downwind side auxiliary heat exchange section 12b. The refrigerant that has passed through the downwind side auxiliary heat exchange section 12b passes through the intermediate header 22 and is guided to the downwind side main heat exchange section 12a. The refrigerant that has passed through the downwind side main heat exchange section 12a passes through the upper part of the connecting header 24 and is guided to the windward side main heat exchange section 11a. The refrigerant that has passed through the windward side main heat exchange section 11a passes through the upper part of the inlet and outlet header 21 and flows out to the gaseous refrigerant pipe 32. In such a refrigerant flow process, the refrigerant evaporates through heat exchange with outdoor air.

[0075] In addition, when the heat exchanger 100 functions as a heat sink for the refrigerant, Figure 1 As shown by the arrows indicating the flow of the refrigerant, the refrigerant flowing in from the gaseous refrigerant pipe 32 passes through the upper portion of the inlet and outlet header 21 and is guided to the main heat exchange portion 11a on the windward side. The refrigerant that has passed through the main heat exchange portion 11a on the windward side passes through the upper portion of the connecting header 24 and is guided to the main heat exchange portion 12a on the downwind side. The refrigerant that has passed through the main heat exchange portion 12a on the downwind side passes through the intermediate header 22 and is guided to the auxiliary heat exchange portion 12b on the downwind side. The refrigerant that has passed through the auxiliary heat exchange portion 12b on the downwind side passes through the lower portion of the connecting header 24 and is guided to the auxiliary heat exchange portion 11b on the windward side. The refrigerant that has passed through the auxiliary heat exchange portion 11b on the windward side passes through the lower portion of the inlet and outlet header 21 and the refrigerant splitter 20 and flows out to the liquid refrigerant pipe 31. In such a refrigerant flow process, the refrigerant dissipates heat through heat exchange with the outdoor air.

[0076] It should be noted that in the heat exchanger 100, the windward heat exchanger 11 and the downwind heat exchanger 12 of the heat exchanger 10 of the plurality of rows (two rows in this embodiment) are respectively divided into two upper and lower sections, namely, the main heat exchanger 11a, 12a and the auxiliary heat exchanger 11b, 12b, which are connected via the intermediate header 22 and the intermediate connecting pipe 23, etc., but are not limited thereto. For example, the windward heat exchanger 11 and the downwind heat exchanger 12 may not be divided into upper and lower sections. In this case, the intermediate header 22 and the intermediate connecting pipe 23, etc. are not required.

[0077] In the heat exchanger 100, the plurality of heat transfer tubes 13 arranged in multiple stages along a predetermined tube segment direction (vertical direction in this embodiment) are arranged in two rows in a staggered manner along a tube row direction (in this embodiment, the direction of passage of outdoor air) intersecting the tube segment direction and the length direction of the heat transfer tubes 13, but the present invention is not limited thereto, and three or more rows may be arranged. In this case, according to the arrangement or path of the heat transfer tubes 13, an intermediate header 22 or a connecting header 24 may be appropriately added to connect to the ends of the heat transfer tubes 13 in the length direction.

[0078] 〈Detailed structure of connecting header〉

[0079] Figure 3 to Figure 6 They are an enlarged perspective view, an exploded perspective view, a plan cross-sectional view, and a longitudinal cross-sectional view in the width direction of the connection header 24 . Figure 5 is along Figure 6 Sectional view taken along line VV in FIG. Figure 3 , Figure 4 The figure shows a state where the heat transfer tube 13 is not inserted into the connecting header 24. Figure 5 , Figure 6 The heat transfer tubes 13 are shown inserted into the connecting header 24. In the following description, the direction perpendicular to the longitudinal direction of the connecting header 24 and the longitudinal direction of the heat transfer tubes 13 is referred to as the width direction of the connecting header 24 (sometimes simply referred to as the header width direction).

[0080] like Figure 3 and Figure 4 As shown, the connection header 24 is composed of a first member 40, a second member 50, and a third member 60 stacked in sequence.

[0081] The first component 40 includes: a main wall portion 41 having a plurality of through holes 42 through which one end of the plurality of heat transfer tubes 13 in the longitudinal direction passes; and a pair of outer plates 43 extending from both ends of the main wall portion 41 in the header width direction to the third component 60 in the longitudinal direction of the heat transfer tubes 13. The plurality of through holes 42 are arranged in a plurality of rows (e.g., two rows) in a staggered manner along the header width direction according to the arrangement of the plurality of heat transfer tubes 13. A plurality of rivet claws 44 are formed at the front end portions of the pair of outer plates 43. The outer plates 43 including the rivet claws 44 may also be formed integrally with the main wall portion 41 by, for example, stamping.

[0082] The second component 50 forms a plurality of insertion spaces 70 connected to one end portion in the longitudinal direction of the plurality of heat transfer tubes 13. Specifically, the second component 50 includes: a pair of side plates 51 sandwiching the plurality of insertion spaces 70 from the width direction of the header; and at least one (in this embodiment, a plurality of) partition plates 52 connected to each of the pair of side plates 51 in a manner that separates the plurality of insertion spaces 70 from each other. Each side plate 51 and the partition plate 52 may also be integrally formed by, for example, extrusion molding, cutting processing, 3D processing, or the like.

[0083] The third member 60 is composed of a flat plate portion 61, which is opposed to one end portion in the longitudinal direction of the plurality of heat transfer tubes 13 that have passed through the plurality of through holes 112. In the present embodiment, the third member 60, i.e., the flat plate portion 61, blocks the side of the plurality of insertion spaces 70 opposite to the main wall portion 41 of the first member 40.

[0084] In this embodiment, if Figure 5 As shown, if the caulking claws 44 of the first member 40 are caulked on the surface of the third member 60 opposite to the second member 50, the connection header 24 on which the first member 40, the second member 50, and the third member 60 are stacked is fixed. Here, each side plate 51 of the second member 50 is covered from the outside in the header width direction by each outer plate 43 of the first member 40. In addition, one end surface of each side plate 51 and the partition plate 52 of the second member 50 is in contact with the main wall portion 41 of the first member 40, and the other end surface of each side plate 51 and the partition plate 52 is in contact with the third member 60 (flat plate portion 61).

[0085] In addition, in this embodiment, if Figure 6As shown, the partition plate 52 of the second component 50 has a step 52a corresponding to the through holes 42 of the first component 40, that is, the staggered arrangement of the heat transfer tubes 13, so that each of the plurality of insertion spaces 70 overlaps with two through holes 42 arranged in parallel along the width direction of the header (tube row direction) and at different positions in the tube section direction. That is, each of the plurality of insertion spaces 70 communicates with one end portion in the length direction of two heat transfer tubes 13 arranged in the tube row direction and at different positions in the tube section direction.

[0086] 〈Detailed structure of inlet and outlet headers〉

[0087] Figure 7 to Figure 10 They are respectively an enlarged perspective view, an exploded perspective view, a top cross-sectional view, and a longitudinal cross-sectional view in the width direction of the inlet and outlet header 21 . Fig. 9 is along Fig.10 Cross-sectional view taken along line IX-IX. Figure 7 , Figure 8 The figure shows a state where the heat transfer tube 13 is not inserted into the inlet and outlet headers 21. Fig. 9 , Fig.10 The heat transfer tube 13 is shown inserted into the inlet and outlet header 21. In the following description, the direction perpendicular to the length direction of the inlet and outlet header 21 and also perpendicular to the length direction of the heat transfer tube 13 is referred to as the width direction of the inlet and outlet header 21 (sometimes simply referred to as the header width direction).

[0088] It should be noted that Figure 7 to Figure 10 The structure of the lower part of the inlet and outlet header 21 connected to the refrigerant splitter 20 is shown, but by adjusting the structure of the main flow path part (the fourth component 140 and the fifth component 150 described later), that is, adjusting the formation position or shape of the opening of the main flow path or the outer periphery of the header, it is also possible to adjust the structure of the main flow path part (the fourth component 140 and the fifth component 150 described later) to the same Figure 7 to Figure 10 The structure shown is essentially the same as the structure that constitutes the upper or intermediate header 22 of the inlet and outlet headers 21.

[0089] like Figure 7 and Figure 8 As shown, the inlet and outlet header 21 is formed by stacking a first component 110, a second component 120, a third component 130, a fourth component 140, and a fifth component 150 in sequence.

[0090] The first component 110 includes a main wall portion 111 formed with a plurality of through holes 112 through which one end of a plurality of heat transfer tubes 13 in the longitudinal direction passes, and a pair of outer plates 113 extending from both ends of the main wall portion 111 in the header width direction along the longitudinal direction of the heat transfer tubes 13 to the fifth component 150. The plurality of heat transfer tubes 13 arranged in a row along the tube section direction are inserted into the plurality of through holes 112. A plurality of caulking claws 114 are formed at the front end portions of the pair of outer plates 113. The outer plates 113 including the caulking claws 114 may be formed integrally with the main wall portion 111, for example, by press working.

[0091] The second component 120 forms a plurality of insertion spaces 160 connected to one end portion in the longitudinal direction of the plurality of heat transfer tubes 13. Specifically, the second component 120 includes: a pair of side plates 121 surrounding the plurality of insertion spaces 160 from the width direction of the header, and at least one (in this embodiment, a plurality of) partition plates 122 connected to each of the pair of side plates 121 in a manner that separates the plurality of insertion spaces 160 from each other. Each of the side plates 121 and the partition plates 122 may also be integrally formed by, for example, extrusion molding, cutting processing, 3D processing, or the like.

[0092] The third member 130 is composed of a flat plate portion 131 which faces one end portion in the longitudinal direction of the plurality of heat transfer tubes 13 which have passed through the plurality of through holes 112. In this embodiment, the flat plate portion 131 is provided with a plurality of holes 132 which overlap with each of the plurality of insertion spaces 160.

[0093] The fourth component 140 is composed of a flat plate portion 141 arranged on the side of the third component 130 opposite to the plurality of heat transfer tubes 13. In this embodiment, the flat plate portion 141 is provided with a main flow path 142 overlapping with the plurality of holes 132 of the third component 130, and a connection hole 143 connected to the main flow path 142. Here, instead of providing one main flow path 142 in common for all sections, the main flow path 142 and the connection hole 143 may be dispersedly arranged according to a predetermined number of sections (see Figure 8 ).

[0094] The fifth component 150 is composed of a flat plate portion 151 disposed on the side of the fourth component 140 opposite to the plurality of heat transfer tubes 13. In this embodiment, the flat plate portion 151 is provided with a plurality of openings 152 overlapping with the respective connection holes 143 of the fourth component 140. The plurality of openings 152 are connected to the respective ends of the refrigerant distributor 20.

[0095] In this embodiment, if Fig. 9As shown, if the caulking claw 114 of the first member 110 is caulked on the surface of the fifth member 150 opposite to the fourth member 140, the inlet and outlet header 21 on which the first member 110, the second member 120, the third member 130, the fourth member 140 and the fifth member 150 are stacked is fixed. Here, each side plate 121 of the second member 120 is covered from the outside in the header width direction by each outer plate 113 of the first member 110. In addition, one end surface of each side plate 121 and the partition plate 122 of the second member 120 is in contact with the main wall portion 111 of the first member 110, and the other end surface of each side plate 121 and the partition plate 122 is in contact with the third member 130 (flat plate portion 131).

[0096] In addition, in this embodiment, if Fig.10 As shown, each insertion space 70 corresponds to each through hole 112 of the first component 110. That is, the plurality of insertion spaces 70 are respectively connected to one end in the length direction of a heat transfer tube 13. In this way, the refrigerant can flow between the heat transfer tube 13 and the refrigerant distributor 20 through the insertion space 70, the hole 132 of the third component 130, the main flow path 142 and the connecting hole 143 of the fourth component 140, and the opening 152 of the fifth component 150.

[0097] - Effects of implementation -

[0098] The heat exchanger 100 according to the present embodiment includes a plurality of heat transfer tubes 13 arranged in multiple stages along a predetermined direction, and headers 21, 24 that hold one end in the longitudinal direction of the plurality of heat transfer tubes 13. The headers 21, 24 include: a first member 40, 110 including a main wall portion 41, 111 having a plurality of through holes 42, 112 through which the one end in the longitudinal direction of the plurality of heat transfer tubes 13 pass; a second member 50, 120 constituting a plurality of insertion spaces 70, 160 communicating with the one end in the longitudinal direction of the plurality of heat transfer tubes 13; and a third member 60, 130 facing the one end in the longitudinal direction of the plurality of heat transfer tubes 13 having passed through the plurality of through holes 42, 112. The second member 50, 120 includes: a pair of side plates 51, 121 that surround the plurality of insertion spaces 70, 160 in the width direction of the headers 21, 24; and at least one partition plate 52, 122 connected to each of the pair of side plates 51, 121 in a manner that separates the plurality of insertion spaces 70, 160 from each other. In this way, the partition plates 52, 122 of the second member 50, 120 that separate the insertion spaces 70, 160 from each other are supported by the side plates 51, 121 of the second member 50, 120 from both sides of the headers 21, 24. Therefore, since deformation when the components are riveted can be suppressed, it is difficult to generate a gap between the first member 40, 110 and the second member 50, 120 into which the end of the heat transfer tube 13 is inserted. That is, a structure that separates the insertion spaces 70 from each other can be achieved.

[0099] In the heat exchanger 100 of the present embodiment, if a heat sink type component extruded in the wind direction (short side direction of the flat tube) as in the conventional method is used as the second component 50 constituting the connecting header 24, and a component extruded in the tube axis direction of the heat transfer tube 13 is used, the insertion spaces 70 can be easily partitioned from each other even for a staggered arrangement of the heat transfer tubes 13. That is, by adjusting the extruded shape of the second component 50, various arrangements such as a staggered arrangement can be easily accommodated, thereby improving the degree of freedom of the passage structure (the number of tube rows or the number of heat transfer tubes connected to each insertion space 70, etc.) and the assemblability of the heat exchanger 100.

[0100] Furthermore, in the heat exchanger 100 of the present embodiment, if the pair of side plates 51 , 121 and the partition plates 52 , 122 of the second member 50 , 120 are formed integrally, the second member 50 , 120 is less likely to deform.

[0101] In addition, in the heat exchanger 100 of the present embodiment, the third member 60 constituting the connecting header 24 blocks the side of the plurality of insertion spaces 70 opposite to the main wall portion 41 of the first member 40, and each of the plurality of insertion spaces 70 communicates with one end portion in the length direction of two heat transfer tubes 13, so that the connecting header 24 functions as an inter-row refrigerant return portion. Here, since the plurality of heat transfer tubes 13 are staggered in two rows in the width direction of the header 24, the heat exchange performance of the heat exchanger 100 can be improved.

[0102] In the heat exchanger 100 of the present embodiment, the inlet and outlet header 21 includes a fourth member 140 disposed on the side of the third member 130 opposite to the plurality of heat transfer tubes 13 and constituting the main flow path 142, and the third member 130 is provided with a plurality of holes 132 connecting each insertion space 160 with the main flow path 142. Therefore, the inlet and outlet header 21 functions as a refrigerant inflow portion or a refrigerant outflow portion.

[0103] In addition, in the heat exchanger 100 of the present embodiment, since the pair of outer plates 43, 113 covering the side plates 51, 121 of the second member 50, 120 from the outer side in the header width direction is included, the second member 50, 120 is more difficult to deform. Here, since the caulking claws 44, 114 are provided on each outer plate 43, 113, each member can be caulked by the caulking claws 44, 114. In addition, if each outer plate 43, 113 is formed integrally with the main wall portion 41, 111 as a part of the first member 40, 110, the number of header members can be reduced.

[0104] Furthermore, in the heat exchanger 100 of the present embodiment, if the heat transfer tubes 13 are flat tubes, the heat transfer area of ​​the heat transfer tubes 13 can be increased, thereby improving the heat exchange performance.

[0105] <Comparative Example>

[0106] Fig.11 is a top cross-sectional view of a connecting header according to a comparative example, Fig.12 is a longitudinal cross-sectional view in the width direction of a connecting header according to a comparative example, Fig.13 FIG. 1 is a longitudinal cross-sectional view of a component constituting an insertion space in a connecting header according to a comparative example in the length direction of the heat transfer tube. Fig.11 , Fig.12 In, with Figure 5 , Figure 6 In the illustrated embodiments, the same components are denoted by the same reference numerals.

[0107] Figure 11 to Figure 13 The connecting header and Figure 5 , Figure 6The connection header 24 shown is different in that a heat sink type member 80 is provided as a member constituting the insertion space 70 instead of the second member 50 and the third member 60 of the embodiment. Specifically, the heat sink type member 80 includes: a flat plate portion 81 blocking the side of the insertion space 70 opposite to the main wall portion 41 of the first member 40; and at least one (a plurality of in this comparative example) partition plate 82 extending from the flat plate portion 81 to the main wall portion 41 of the first member 40 in a manner that separates the plurality of insertion spaces 70 from each other.

[0108] In this comparative example, when the connecting header is formed by riveting the riveting claws 44 of the first member 40 to the back surface of the heat sink type member 80 (flat plate portion 81), the flat plate portion 81 is warped, and as a result, the partition plate 82 cannot be fully contacted with the main wall portion 41 of the first member 40. In other words, a gap is generated between the heat sink type member 80 and the first member 40. Therefore, it is difficult to realize a structure for partitioning the insertion spaces 70 from each other.

[0109] In addition, in this comparative example, the heat sink type component 80 is extruded along the width direction of the header (wind direction). In other words, the partition plate 82 is extruded along the tube row direction. Therefore, in mass production, it is difficult to correspond to the spacing position of each segment to the arrangement method such as staggered arrangement that is different according to the row.

[0110] 〈Variation Example〉

[0111] Figures 14 to 19 They are longitudinal cross-sectional views in the width direction of the connecting headers involved in the modified examples. Figures 14 to 19 In, with Figure 6 In the illustrated embodiments, the same components are denoted by the same reference numerals.

[0112] exist Figure 6 In the connecting header 24 of the embodiment shown in the figure, the flow of the refrigerant is turned back between each row of heat transfer tubes 13 arranged in two rows staggered in the width direction of the header, but the present invention is not limited to this. Figures 14 to 19 Even when the connecting header is configured as shown, the same effects as those of the above-described embodiment can be obtained.

[0113] Specifically, for example Fig.14 As shown, the connecting header may be constructed in such a way that the ends of two adjacent heat transfer tubes 13 in the tube section direction among a plurality of heat transfer tubes 13 arranged in a row in the tube section direction are communicated with each insertion space 70 .

[0114] In addition, for example Fig.15 As shown, the connecting header may be constructed such that the ends of two adjacent heat transfer tubes 13 in the header width direction among the plurality of heat transfer tubes 13 arranged in two rows in the header width direction communicate with each insertion space 70 .

[0115] In addition, for example Fig.16 As shown in FIG. 1 , the connecting header may be configured such that the ends of three heat transfer tubes 13 adjacent to each other in the header width direction among the plurality of heat transfer tubes 13 arranged in three rows in the header width direction are connected to each insertion space 70. In this case, the refrigerant flowing into the connecting header through one heat transfer tube 13 may flow out to the other two heat transfer tubes 13. In this way, the pressure loss can be reduced.

[0116] In addition, Figure 6 In the connecting header 24 of the embodiment shown, an inclined step 52a is provided on the partition 52 of the second member 50 corresponding to the staggered arrangement of the heat transfer tubes 13, but it may be replaced by, for example, Fig.17 As shown in FIG. 5 , a vertical step 52b is provided. In this way, the width dimension of the header can be reduced.

[0117] In addition, for example Fig.18 As shown, the connecting header may be constructed in such a way that the ends of three adjacent heat transfer tubes 13 in the header width direction among the plurality of heat transfer tubes 13 arranged in three rows in a staggered manner in the header width direction are connected to each insertion space 70. In this case, the refrigerant flowing into the connecting header through one heat transfer tube 13 may also flow out to the other two heat transfer tubes 13. In this way, the pressure loss can be reduced. In addition, a vertical step 52b may be provided on the partition plate 52 of the second component 50 corresponding to the staggered arrangement of the heat transfer tubes 13. In this way, the dimension in the header width direction can be reduced.

[0118] In addition, for example Fig.19 As shown, the connecting header may be constructed in such a way that the ends of three heat transfer tubes 13 adjacent to each other in the width direction of the header among the plurality of heat transfer tubes 13 arranged in two rows in a staggered manner in the width direction of the header are connected to each insertion space 70. In this case, the refrigerant flowing into the connecting header through one heat transfer tube 13 may also flow out to the other two heat transfer tubes 13. In this way, the pressure loss can be reduced. In addition, a vertical step 52b may be provided on the partition plate 52 of the second component 50 corresponding to the staggered arrangement of the heat transfer tubes 13. In this way, the dimension in the width direction of the header can be reduced.

[0119] (Other embodiments)

[0120] In the above-described embodiment (including modified examples), the second member 50 , 120 includes a pair of side plates 51 , 121 surrounding the insertion space 70 , 160 in the width direction of the headers 21 , 24 , and a partition plate 52 , 122 partitioning the insertion spaces 70 , 160 from each other.

[0121] However, for example Fig. 20As shown in the figure, the second component 50 may also include a side plate 51 that divides one side (here, the left side) of the insertion space 70 in the width direction of the header, and a partition plate 52 that separates the insertion spaces 70 from each other, and one of the outer plates 43 of the first component 40 divides the other side (here, the right side) of the insertion space 70 in the width direction of the header. Here, the side plate 51 and the partition plate 52 may also be formed integrally. It should be noted that in Fig. 20 In, with Figure 6 In the illustrated embodiments, the same components are denoted by the same reference numerals.

[0122] In addition, for example Fig.21 Like the inlet and outlet header 21 shown in the figure, the second component 120 may also include a side plate 121 that divides one side (here, the left side) of the insertion space 160 in the width direction of the header, and a partition plate 122 that separates the insertion spaces 160 from each other, and one of the outer plates 113 of the first component 110 divides the other side (here, the right side) of the insertion space 160 in the width direction of the header. Here, the side plate 121 and the partition plate 122 may also be formed integrally. It should be noted that in Fig.21 In, with Fig.10 In the illustrated embodiments, the same components are denoted by the same reference numerals.

[0123] In the above-described embodiment (including modified examples), in the headers 21 and 24, a pair of side plates 51 and 121 and partition plates 52 and 122 are integrally formed. However, instead, the side plates 51 and 121 and partition plates 52 and 122 may be formed as separate components and then joined to each other.

[0124] In the above-described embodiments (including modified examples), in the headers 21 and 24, each of the pair of side plates 51 and 121 is covered from the outside in the header width direction by a pair of outer plates 43 and 113. However, instead, the pair of outer plates 43 and 113 may not be provided.

[0125] In the above-described embodiments (including modified examples), the caulking claws 44, 114 are provided on each of the pair of outer plates 43, 113 in the headers 21, 24, but caulking claws may be provided on other header members instead.

[0126] In addition, in the above-mentioned embodiments (including modified examples), in the headers 21, 24, the pair of outer plates 43, 113 are formed integrally with the main wall portion 41, 111 as a part of the first component 40, 110, but instead, the pair of outer plates 43, 113 and the first component 40, 110 may be formed separately.

[0127] In addition, in the above-mentioned embodiment (including modified examples), the flat tube is used as the heat transfer tube 13, but other tubes such as round tubes may be used instead.

[0128] In the above-mentioned embodiments (including modified examples), in the headers 21 and 24, the third members 60 and 130 are configured as flat plates, but the shapes of the header members are not particularly limited. In addition, the headers 21 and 24 may also be configured to be divided into a plurality of blocks along the pipe section direction. For example, Fig. 22 As shown, it is also possible to make a plurality of blocks (in Fig. 22 In the case shown, four blocks 50a to 50d are joined in the pipe section direction to form the second component 50 for connecting the header 24. Alternatively, for example, Fig.23 As shown, it is also possible to make a plurality of blocks (in Fig.23 In the case shown, four blocks 120a to 120d) are joined in the pipe section direction to form the second member 120 of the inlet and outlet header 21. In this way, when the second member 50, 120 of the header 21, 24 is processed by extrusion molding or cutting, the die size during extrusion can be reduced compared to the case where the entire second member 50, 120 is formed integrally, and the length of the cut surface can be shortened, so that mass productivity can be improved and processing costs can be suppressed. Here, the number of blocks constituting the second member 50, 120 is not particularly limited, as long as the number of blocks corresponds to the size of the header 21, 24 in the pipe section direction.

[0129] In addition, in the above-mentioned embodiment (including the modified example), Figure 7 to Figure 10 The structure shown constitutes the inlet and outlet headers 21, but the same structure may be used to constitute a branch header or a header for carbon dioxide refrigerant.

[0130] In the above-described embodiment (including modified examples), the structure of the present invention is applied to both the inlet and outlet headers 21 and the connecting headers 24 . However, the structure of the present invention may be applied to either one of the inlet and outlet headers 21 and the connecting headers 24 .

[0131] In addition, in the above-mentioned embodiment (including modified examples), the case where the heat exchanger 100 is placed as an outdoor heat exchanger in the outdoor unit of the air-conditioning device is described, but the type and placement location of the heat exchanger that is the application object of the present invention are not particularly limited.

[0132] The above describes the implementation mode and the modified example, but it should be understood that various changes in the mode or detailed structure can be made without departing from the subject and scope of the claims. As long as the function of the object of the present disclosure is not affected, the above implementation mode, modified example, and other implementation modes can also be appropriately combined or replaced. Moreover, the terms "first", "second", etc. mentioned above are only used to distinguish the sentences containing the above terms, and are not intended to limit the number or order of the sentences.

[0133] - Industrial Applicability -

[0134] The present disclosure is useful for heat exchangers.

[0135] - Explanation of symbols -

[0136] 10 Heat exchange unit

[0137] 11. Windward side heat exchange section

[0138] 11a Main heat exchange section on the windward side

[0139] 11b Windward side heat exchange section

[0140] 12 Downwind heat exchange unit

[0141] 12a Main heat exchange section on the downwind side

[0142] 12b Downwind side heat exchange unit

[0143] 13 Heat transfer tube

[0144] 14 Flat surface

[0145] 15 Internal flow path

[0146] 16 Heat transfer fins

[0147] 17 Notch

[0148] 20 Refrigerant flow divider

[0149] 21 Inlet and outlet headers

[0150] 22 Intermediate header

[0151] 23 Intermediate connecting pipe

[0152] 24 Connecting header

[0153] 31 Liquid refrigerant pipe

[0154] 32 Gas refrigerant pipe

[0155] 40 First Part

[0156] 41 Main wall

[0157] 42 Through Holes

[0158] 43 Outer plate

[0159] 44 Riveting claws

[0160] 50 Second Part

[0161] 51 Side Panel

[0162] 52 Bulkhead

[0163] 60 Third Part

[0164] 61 Flat Plate

[0165] 70 Insert Space

[0166] 100 Heat exchanger

[0167] 110 First Part

[0168] 111 Main wall

[0169] 112 Through Hole

[0170] 113 Outer plate

[0171] 114 Riveting claws

[0172] 120 Second Part

[0173] 121 Side Panel

[0174] 122 Partition

[0175] 130 Third Part

[0176] 131 Flat Plate

[0177] 132 holes

[0178] 140 The fourth part

[0179] 141 Flat Plate

[0180] 142 Main Road

[0181] 143 Connection hole

[0182] 150 Fifth Part

[0183] 151 Flat Plate

[0184] 152 Opening

[0185] 160 Insert Space

Claims

1. A heat exchanger, comprising a plurality of heat transfer tubes (13) arranged in a plurality of stages along a predetermined direction and a header (21, 24) for holding one end of the plurality of heat transfer tubes (13) in a longitudinal direction, characterized in that: The headers (21, 24) include: A first component (40, 110), the first component (40, 110) comprising a main wall portion (41, 111), wherein a plurality of through holes (42, 112) are formed in the main wall portion (41, 111) for allowing one end portion of the plurality of heat transfer tubes (13) in the longitudinal direction to pass through; a second component (50, 120), the second component (50, 120) constituting a plurality of insertion spaces (70, 160) communicating with one end portion in the length direction of the plurality of heat transfer tubes (13); and a third component (60, 130), the third component (60, 130) directly facing one end portion in the length direction of the plurality of heat transfer tubes (13) in a state of having passed through the plurality of through holes (42, 112), The second component (50, 120) comprises: a pair of side plates (51, 121), the pair of side plates (51, 121) enclosing the plurality of insertion spaces (70, 160) in the width direction of the headers (21, 24); and a plurality of partitions (52, 122), the plurality of partitions (52, 122) being connected to each of the side plates (51, 121) in a pair of the side plates (51, 121) in a manner of separating the plurality of insertion spaces (70, 160) from each other; The pair of side plates (51, 121) and the plurality of heat transfer tubes (13) are not connected to each other. The plurality of insertion spaces (70, 160) are individually partitioned by the plurality of partition plates (52, 122).

2. The heat exchanger according to claim 1, characterized in that: The pair of side plates (51, 121) and the partition plate (52, 122) are formed integrally.

3. The heat exchanger according to claim 1 or 2, characterized in that: The third component (60) blocks a side of the plurality of insertion spaces (70) opposite to the main wall portion (41). Each of the plurality of insertion spaces (70) is communicated with one end portion in the length direction of two or more of the plurality of heat transfer tubes (13).

4. The heat exchanger according to claim 3, characterized in that: The plurality of heat transfer tubes (13) are staggeredly arranged in two or more rows in the width direction of the header (24).

5. The heat exchanger according to claim 1 or 2, characterized in that: The header (21) further includes a fourth component (140), which is arranged on a side of the third component (130) opposite to the plurality of heat transfer tubes (13) and forms a main flow path (142). The third member (130) is provided with a plurality of holes (132) for connecting each of the plurality of insertion spaces (160) to the main flow path (142).

6. The heat exchanger according to claim 1 or 2, characterized in that: The heat exchanger further includes a pair of outer plates (43, 113), and the pair of outer plates (43, 113) respectively cover the pair of side plates (51, 121) from the outer sides in the width direction of the headers (21, 24).

7. The heat exchanger according to claim 6, characterized in that: Each of the pair of outer plates (43, 113) is provided with a caulking claw (44, 114).

8. The heat exchanger according to claim 6, characterized in that: The pair of outer plates (43, 113) are formed integrally with the main wall portion (41, 111) as a part of the first member (40, 110).

9. A heat exchanger comprising a plurality of heat transfer tubes (13) arranged in a plurality of stages along a predetermined direction and a header (21, 24) for holding one end of the plurality of heat transfer tubes (13) in a longitudinal direction, characterized in that: The headers (21, 24) include: A first component (40, 110), the first component (40, 110) comprising a main wall portion (41, 111), wherein a plurality of through holes (42, 112) are formed in the main wall portion (41, 111) for allowing one end portion of the plurality of heat transfer tubes (13) in the longitudinal direction to pass through; a second component (50, 120), the second component (50, 120) constituting a plurality of insertion spaces (70, 160) communicating with one end portion in the length direction of the plurality of heat transfer tubes (13); and a third component (60, 130), the third component (60, 130) directly facing one end portion in the length direction of the plurality of heat transfer tubes (13) in a state of having passed through the plurality of through holes (42, 112), The second component (50, 120) comprises: a side plate (51, 121) which divides one side of the plurality of insertion spaces (70, 160) in the width direction of the header (21, 24); and a plurality of partitions (52, 122), wherein the plurality of partitions (52, 122) are connected to the side plates (51, 121) in a manner of separating the plurality of insertion spaces (70, 160) from each other; The first component (40, 110) further includes an outer plate (43, 113), wherein the outer plate (43, 113) divides the other side of the plurality of insertion spaces (70, 160) in the width direction of the header (21, 24). The partition plate (52, 122) is directly connected to the outer plate (43, 113).

10. The heat exchanger according to claim 9, characterized in that: The side plate (51, 121) and the partition plate (52, 122) are formed integrally.

11. The heat exchanger according to any one of claims 1, 2 and 9, characterized in that: Each of the plurality of heat transfer tubes (13) is a flat tube.

12. The heat exchanger according to any one of claims 1, 2 and 9, characterized in that: The second member (50, 120) is formed by joining a plurality of blocks (50a to 50d, 120a to 120d) formed separately in the predetermined direction.

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