JP5884484B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger.

  Conventionally, heat exchangers for heating and cooling air have been used in outdoor units of air conditioners, heat source units of hot water supply apparatuses, and the like. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2006-284133) proposes a heat exchanger including a header and a tube. The header has a main channel through which the refrigerant flows. Further, the tube has a plurality of flow paths through which the refrigerant flows. The header and the tube are joined, and the refrigerant flows from the flow path of the header to the flow path of the tube or from the flow path of the tube to the flow path of the header.

  By the way, in such a heat exchanger, a header and a tube are joined by a brazing material. Specifically, one of a plurality of members constituting the header is a clad material to which a brazing material is attached. Both ends of the tube in the longitudinal direction are inserted into a header and put into a furnace. Thereby, the brazing material flows into the gap formed between the header and the tube, and the header and the tube are joined.

  Here, a gap between the header and the tube is necessary for pouring the brazing material or preventing damage to each member due to expansion in the furnace. However, when the gap is increased, the relative positions of the header and the tube change before the header and the tube are joined. That is, since the header and the tube are joined with the header tilted, the performance of the heat exchanger may be reduced.

  The subject of this invention is providing the heat exchanger which can maintain the relative position of the header and tube at the time of joining.

  The heat exchanger according to the first aspect of the present invention is a heat exchanger that includes a header, a plurality of tubes, and a plate, and these are integrated by brazing. The header is formed with a main channel through which the refrigerant flows. The plurality of tubes are stacked in the length direction of the header, and end portions are inserted into the header. The end of the plate is inserted into the header together with the plurality of tubes. The header has a connecting part. The connecting portion forms a first insertion space and a plurality of second insertion spaces. The first insertion space is a space into which the plate is inserted. The plurality of second insertion spaces are spaces into which a plurality of tubes are respectively inserted. The depth dimension of the first insertion space is larger than the depth dimension of the second insertion space.

  In the heat exchanger according to the first aspect of the present invention, the plate is inserted into the first insertion space formed in the connecting portion. A tube is inserted into the second insertion space formed in the connecting portion. The depth dimension of the first insertion space is larger than the depth dimension of the second insertion space. Since the plate is inserted deeply into the header, the relative position with respect to the header can be maintained. Thereby, the inclination of the header in the time until a header and a tube are joined can be suppressed, and the relative position of a header and a tube can be maintained.

In the heat exchanger according to the first aspect of the present invention, the header further has a communication hole forming portion. A communication hole is formed in the communication hole forming portion. The communication hole communicates with the main channel from a direction intersecting the axial direction of the main channel. Moreover, the edge part of a tube has an end surface. On the end face, a plurality of flow path holes through which the refrigerant passes are formed side by side in the first direction. The connecting portion includes a joining member, a spacer, and a fixing member. A joining member is a member for joining a connection hole formation part and the edge part of a tube. The spacer is a member that is disposed between the communication hole forming portion and the end face of the tube and forms a collective space for collecting the refrigerant. The fixing member is a member that is disposed between the joining member and the spacer and fixes the plate and the tube that extend from the outside of the joining member toward the spacer. The first insertion space is formed by a joining member, a fixing member, and a spacer. The second insertion space is formed by a joining member and a fixing member.

In the heat exchanger according to the first aspect of the present invention, the second insertion space is formed in the joining member and the fixing member. A first insertion space is formed in the joining member, the fixing member, and the spacer. Thereby, the attitude | position of a plate can be maintained with many members.

Heat exchanger according to a second aspect of the present invention, there is provided a heat exchanger according to the first aspect, the first insertion space is a space including a second insertion space.

In the heat exchanger according to the second aspect of the present invention, the second insertion space is included in the first insertion space. Thereby, a common space can be used for inserting a plurality of members.

The heat exchanger which concerns on the 3rd viewpoint of this invention is a heat exchanger which concerns on a 2nd viewpoint , Comprising: The edge part of a plate has a projection part and an intermediate part. The protrusion is located at the end in the plate length direction and has a first dimension different from the dimension of the main body. The intermediate portion is positioned between the projection and the main body portion in the length direction of the plate, and has the same second dimension as the main body portion. Further, the protrusion is fixed by a first insertion hole that is a hole constituting the first insertion space, and the intermediate part is fixed by a second insertion hole that is a hole constituting the second insertion space.

In the heat exchanger which concerns on the 3rd viewpoint of this invention, the edge part of the plate inserted in 2nd insertion space has a projection part and an intermediate part. The protrusion and the intermediate part have different dimensions. Further, the protrusion is fixed by the first insertion hole, and the intermediate part is fixed by the second insertion hole. Thereby, since the front-end | tip shape of a plate can be changed into the shape suitable for the 1st insertion hole, a plate can be reliably fixed with respect to a header.

The heat exchanger which concerns on the 4th viewpoint of this invention is a heat exchanger which concerns on a 3rd viewpoint , Comprising: The dimension of the 1st clearance gap formed between the side surface of a projection part, and the inner wall of a 1st insertion hole Is smaller than the size of the second gap formed between the side surface of the intermediate portion and the inner wall of the second insertion hole.

In the heat exchanger according to the fourth aspect of the present invention, the tip of the plate is configured to be most difficult to move in the first insertion space. Thereby, the movement of the plate in the first insertion space can be reliably suppressed.

  In the heat exchanger which concerns on the 1st viewpoint of this invention, the inclination of the header in the time until a header and a tube are joined can be suppressed, and the relative position of a header and a tube can be maintained.

Moreover, in the heat exchanger which concerns on the 1st viewpoint of this invention, the attitude | position of a plate can be maintained with many members.

In the heat exchanger according to the second aspect of the present invention, a common space can be used for inserting a plurality of members.

In the heat exchanger according to the third aspect of the present invention, since the tip shape of the rate can be changed to a shape that matches the first insertion hole, the plate can be reliably fixed to the header.

In the heat exchanger according to the fourth aspect of the present invention, the movement of the plate in the first insertion space can be reliably suppressed.

It is a schematic block diagram of a heat exchanger. It is the figure (bottom view) which looked at the heat exchanger of FIG. 1 from the arrow II direction. It is an enlarged view of the area | region R of FIG. It is a schematic block diagram of a header. It is the elements on larger scale of the VV cross section of FIG. It is the elements on larger scale of the VI-VI cross section of FIG. It is the elements on larger scale of the VII-VII cross section of FIG. It is the elements on larger scale of the VIII-VIII cross section of FIG. It is the elements on larger scale of the IX-IX cross section of FIG. It is the elements on larger scale of the XX cross section of FIG. It is the elements on larger scale of the XI-XI cross section of FIG. It is the elements on larger scale of FIG. It is the elements on larger scale of FIG. It is a figure which shows the 1st insertion space and 2nd insertion space which are formed in a connection part. 10 is an enlarged view of a connecting portion according to Modification A. FIG.

  Hereinafter, a heat exchanger according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Overall Configuration FIGS. 1 and 2 are diagrams showing a schematic configuration of the heat exchanger 100. FIG. 1 is a front view of the heat exchanger 100. The heat exchanger 100 is used in the mode shown in FIG. FIG. 2 is a view (bottom view) of the heat exchanger 100 of FIG. 1 viewed from the direction of arrow II. The heat exchanger 100 in which the constituent members are assembled is put into a furnace in the form shown in FIG. 2 and integrated by brazing each constituent member with a brazing material. 2 is the center position in the height direction of the heat exchanger 100 in a state where the heat exchanger 100 is laid on a horizontal plane.

  The heat exchanger 100 according to the present embodiment is provided inside an outdoor unit of a separate type air conditioner. The heat exchanger 100 functions as a refrigerant evaporator or a refrigerant radiator. The heat exchanger 100 is air-cooled and ventilated. The heat exchanger 100 performs heat exchange between the air and the refrigerant flowing inside the heat exchanger 100 using air supplied by a blower provided in the air conditioner.

  As shown in FIG. 1, the heat exchanger 100 mainly includes a plurality of flat multi-hole tubes (tubes) 10, a plurality of heat transfer fins 20, headers 30 and 40, and an insertion plate 60. A plurality of flat multi-hole tubes 10 and insertion plates 60 are joined to the headers 30 and 40. The plurality of flat multi-hole tubes 10 are joined in a direction orthogonal to the longitudinal direction of the headers 30 and 40. Each flat multi-hole tube 10 is stacked along the longitudinal direction of the headers 30 and 40 at a predetermined distance from each other. The insertion plates 60 are disposed on both sides of the plurality of flat multi-hole tubes 10 in the longitudinal direction of the headers 30 and 40. In addition, the insertion plate 60 is joined in a direction orthogonal to the longitudinal direction of the headers 30 and 40, similarly to the plurality of flat multi-hole tubes 10.

  The heat transfer fin 20 is a corrugated fin having a peak portion 21 and a valley portion 22 (see FIG. 3). The heat transfer fins 20 are provided between the plurality of flat multi-hole tubes 10 such that the peak portions 21 and the valley portions 22 are in contact with the flat surface of the flat multi-hole tube 10. The headers 30 and 40 respectively divide the refrigerant in the liquid state and the refrigerant in the gas-liquid two-layer state into each flat multi-hole tube, and collect the refrigerant that has flowed through the inside of each flat multi-hole tube 10. The heat transfer fins 20 are in contact with the air supplied by the blower and receive heat to warm and evaporate the refrigerant flowing inside the flat multi-hole tube 10. The air that has passed through the heat exchanger 100 is cooled by the refrigerant flowing inside the flat multi-hole tube 10, and the temperature decreases. Hereinafter, the structure of each part of the heat exchanger 100 will be described in detail. In the following description, the height direction refers to the vertical direction with reference to the bottom view (FIG. 2) unless otherwise specified.

(2) Flat multi-hole tube The flat multi-hole tube 10 is a heat transfer tube that allows refrigerant to pass through and exchanges heat between air and the refrigerant. The flat multi-hole tube 10 is formed by extruding a metal member such as aluminum or an aluminum alloy. Hereinafter, the configuration of the flat multi-hole tube 10 will be described with reference to FIG. FIG. 3 is an enlarged view of the region R shown in FIG. The thickness direction w10 of the flat multi-hole tube 10 shown in FIG. 3 is the depth direction of the flat multi-hole tube 10 shown in FIG. Further, the width direction L10 of the flat multi-hole tube 10 shown in FIG. 3 corresponds to the height direction (vertical direction) of the flat multi-hole tube 10 shown in FIG.

  As described above, the flat multi-hole tube 10 is joined to the headers 30 and 40. The flat multi-hole tube 10 extends in a direction intersecting the longitudinal direction of the headers 30 and 40 (specifically, a direction orthogonal). The flat multi-hole tube 10 has a predetermined length dimension in the longitudinal direction. The dimension w10 in the thickness direction of the flat multi-hole tube 10 is about 1.0 to 2.5 mm. Further, the flat multi-hole tube has a predetermined width dimension (height dimension) L10. The height L10 of the flat multi-hole tube 10 is about 10 mm to 30 mm.

  As shown in FIG. 3, the flat multi-hole tube 10 mainly includes a tube end portion 11, a plurality of flow path holes 12 a to 12 i, and a tube plane portion 14.

(2-1) Tube End The tube end 11 is both ends in the longitudinal direction of the flat multi-hole tube 10. The tube end portion 11 is a portion joined to the headers 30 and 40. The length dimension L11 of the tube end portion 11 in the longitudinal direction of the flat multi-hole tube 10 is the sum (L11 = t36 + t37) of the thickness dimension t36 of the intervening plate 36 and the thickness dimension t37 of the joining member 37 (FIG. 5 and FIG. 5). (See FIG. 6). In the present embodiment, the length dimension L11 of the tube end portion 11 is about 4.0 mm to 5.0 mm. The tube end portion 11 has an end face 13. The end surface 13 is a surface extending in the thickness direction and the width direction of the flat multi-hole tube 10. Here, the width direction of the flat multi-hole tube 10 is a direction in which flow path holes 12a to 12i described later are arranged, and is a longitudinal direction (height direction) of the end face 13. The thickness direction of the flat multi-hole tube 10 is the width direction of the end face 13.

(2-2) Channel Hole The plurality of channel holes 12a to 12i are formed side by side on the end surface 13. In the present embodiment, nine channel holes 12 a to 12 i are formed in the end surface 13. Specifically, the nine channel holes 12 a to 12 i are formed side by side in the longitudinal direction of the end surface 13. That is, in the furnace, the channel holes 12a to 12i are arranged in the vertical direction. The number of flow path holes 12a to 12i is not limited to nine, and may be nine or more or nine or less. The plurality of flow path holes 12 a to 12 i form a refrigerant flow path for flowing a refrigerant from the header 30 to the header 40. That is, each of the plurality of flow path holes 12a to 12i penetrates from the end face on one end side of the flat multi-hole tube 10 to the end face on the other end side. The diameter of each flow path hole 12a-12i is about 250 micrometers.

(2-3) Tube Plane Portion The tube plane portion 14 is a surface extending in the width direction and the longitudinal direction of the flat multi-hole tube 10 in FIG. The tube plane portion 14 is rectangular. As described above, each flat multi-hole tube 10 is joined to the headers 30 and 40 so that the tube plane portions 14 are parallel to each other. A crest portion 21 or a trough portion 22 of the heat transfer fin 20 is joined to the tube plane portion 14 of the flat multi-hole tube 10. When the heat exchanger 100 is used, the pipe plane portion 14 is substantially parallel to the air flow generated in the horizontal direction in FIG. In addition, in FIG. 1, although the heat exchanger 100 showed the example which uses the six flat multi-hole pipes 10, the number of the flat multi-hole pipes 10 joined to the headers 30 and 40 is limited to this. is not.

(3) Heat Transfer Fin As shown in FIGS. 1 and 3, the heat transfer fin 20 is provided between the plurality of flat multi-hole tubes 10 stacked along the longitudinal direction of the headers 30 and 40. In other words, the heat transfer fin 20 is disposed in a space sandwiched between the tube flat portions 14 of the two flat multi-hole tubes 10. The heat transfer fins 20 exchange heat with the air supplied by the blower. The heat transfer fin 20 is composed of a metal member such as aluminum or an aluminum alloy. The plate thickness of the heat transfer fin 20 is about 0.1 mm. The heat transfer fin 20 is a corrugated fin formed by bending a long plate-like member into a waveform in the longitudinal direction.

  As shown in FIG. 3, the heat transfer fin 20 mainly includes a peak portion 21, a valley portion 22, and a heat transfer surface 23. The peak portion 21 and the valley portion 22 are brazed to the tube plane portion 14 of the flat multi-hole tube 10 in the furnace. The heat transfer surface 23 is a part that mainly performs heat exchange with air. On the heat transfer surface 23, a plurality of cut-and-raised portions 23a for improving heat exchange efficiency are cut and raised in a louver shape. The cut-and-raised portion 23 a is cut and raised at an angle so as to be at a predetermined angle in one of the width directions of the heat transfer fins 20. The cut and raised portion 23a is cut and raised in different directions on one end side and the other end side with respect to the center of the heat transfer fin 20 in the width direction.

(4) Header The headers 30 and 40 divide the refrigerant in the liquid state and the refrigerant in the gas-liquid two-layer state to each flat multi-hole tube 10 and collect the refrigerant that has flowed through the inside of each flat multi-hole tube. Specifically, the refrigerant is fed into the header 30 arranged on the left side of FIG. 1 from the direction R1 in FIG. The header 30 also divides the refrigerant into each flat multi-hole tube 10. Moreover, the header 40 arrange | positioned at the right side of FIG. 1 flows through each flat multi-hole pipe 10, joins the refrigerant | coolant which flowed out from several flow-path holes 12a-12i, and is direction R2 (reverse to direction R1 in FIG. 1). The refrigerant is sent out in the direction of

  The headers 30 and 40 are an aluminum alloy. As shown in FIGS. 2 and 4, the headers 30 and 40 mainly include cylindrical portions 31 and 41, communication hole forming portions 32 and 42, and a connecting portion 50, respectively. The configuration of the header 30 and the configuration of the header 40 are basically the same. Therefore, the configuration of the header 30 will be described below with reference to FIG.

(4-1) Cylindrical portion The cylindrical portion 31 mainly includes a main flow path 31a and a flow path wall 31b. The main flow path 31 a is a refrigerant passage formed inside the header 30. The main flow path 31a is a space surrounded by the flow path wall 31b. The main channel 31a has a circular cross section (transverse cross section) in a direction orthogonal to the long axis. The diameter of the main channel 31a is about 11 mm to 12 mm. The main flow path 31 a extends in the longitudinal direction of the header 30. That is, the axial direction of the main flow path 31a and the longitudinal direction of the header 30 are the same. The main channel 31a communicates with a number of communication channels 34a described later. The thickness of the flow path wall 31b is 4 mm to 6 mm. That is, the outer diameter of the cylindrical portion 31 is about 19 mm to 24 mm.

(4-2) Communication hole forming part The communication hole forming part 32 is a part connected to the side wall of the cylindrical part 31. The communication hole forming portion 32 extends in the longitudinal direction of the header 30. That is, the longitudinal direction of the communication hole forming part 32 and the axial direction of the main flow path 31a coincide. The communication hole forming part 32 has a rectangular plane part. The planar portion has a thickness dimension of about 1.5 mm to 3 mm. The dimension in the longitudinal direction (length dimension) of the plane part is the same as the length dimension of the cylindrical part 31. The height dimension of the flat portion is slightly shorter than the diameter of the cylindrical portion 31. Here, the height direction of the plane portion is the height direction of the communication hole forming portion 32 in a state where the heat exchanger 100 is laid with respect to the horizontal plane (see FIG. 2). That is, the height direction of the flat portion coincides with the width direction in the heat exchanger 100 in use.

  A plurality of communication holes 34 are formed in the plane portion. The communication hole 34 is formed side by side in the longitudinal direction of the communication hole forming part 32. Each communication hole 34 is arranged at a predetermined interval. The communication hole 34 is provided at the center position in the height direction of the communication hole forming part 32. The plurality of communication holes 34 extend in a direction intersecting the axial direction of the main flow path 31a, and constitute a communication flow path 34a that communicates with the main flow path 31a. The communication hole 34 is formed by drilling. When the header 30, the flat multi-hole tube 10, and the insertion plate 60 are joined, the connecting portions 50 are joined to both sides in the height direction of the communication hole forming portion 32.

(4-3) Connecting Part The connecting part 50 is a member for connecting the flat multi-hole tube 10 and the insertion plate 60 to the header 30. 5 to 7 show a schematic configuration of the connecting portion 50. FIG. FIG. 5 is a partial enlarged view of the VV cross section of the heat exchanger 100 shown in FIG. 2. FIG. 6 is a partially enlarged view of a cross section VI-VI of the heat exchanger 100 shown in FIG. 1. FIG. 7 is a partially enlarged view of a cross section VII-VII of the heat exchanger 100 shown in FIG. Hereinafter, with reference to FIGS. 5 to 7, the overall configuration of the connecting portion 50 that connects the header 30 and the flat multi-hole tube 10 or the insertion plate 60 will be described. In addition, the connection part 50 which connects the header 40 and the flat multi-hole pipe 10 or the insertion plate 60 is the same as the structure of the connection part 50 which connects the header 30 and the flat multi-hole pipe 10 or the insertion plate 60. .

  The connecting portion 50 mainly includes a spacer 35, an intervening plate (fixing member) 36, and a joining member 37. As shown in FIGS. 5 to 7, the spacer 35 is disposed adjacent to the communication hole forming portion 32 so as to contact the flat portion of the communication hole forming portion 32. The intervening plate 36 is disposed adjacent to the spacer 35 so as to contact the plane of the spacer 35. The joining member 37 is arrange | positioned in the position which surrounds the communicating hole formation part 32, the spacer 35, and the interposition plate 36 from the outer side. As shown in FIG. 5, the constituent members included in the connecting portion 50 are arranged in the order of the spacer 35, the interposed plate 36, and the joining member 37 from the header 30 side in the direction in which the flat multi-hole tube 10 extends. . That is, the spacer 35 is disposed between the communication hole forming portion 32 and the interposition plate 36, and the interposition plate 36 is disposed between the spacer 35 and the bonding member 37. Hereinafter, each constituent member included in the connecting portion 50 will be described in detail.

(4-3-1) Spacer The spacer 35 is a member that forms a refrigerant collective space AR between the header 30 and the flat multi-hole tube 10 (see FIGS. 5 and 6). The collective space AR is a space for distributing the refrigerant flowing through the header 30 or a space for collecting the refrigerant that has flowed through the plurality of refrigerant flow paths 12 a to 12 i included in each flat multi-hole pipe 10.

  The spacer 35 is a clad material. Specifically, the spacer 35 is a metal member in which the same aluminum alloy as the headers 30 and 40 is used as a core, and another aluminum alloy (a brazing material) having a melting point lower than that of the core is bonded to the surface of the core.

  The spacer 35 is a flat plate member extending in the longitudinal direction of the header 30 as shown in FIG. The spacer 35 has a thickness dimension t35 of about 2.0 mm to 3.0 mm. The dimension in the longitudinal direction of the spacer 35 is substantially the same as the dimension in the longitudinal direction of the communication hole forming portion 32. The height dimension h35 of the spacer 35 is substantially the same as the height dimension h32 of the communication hole forming portion 32 (see FIG. 8).

  As shown in FIG. 8, the spacer 35 is formed with a spacer hole (first insertion hole) 351 that constitutes the assembly space AR. The opening shape of the spacer hole 351 is rectangular or elliptical. A plurality of spacer holes 351 are formed side by side in the length direction of the spacer 35. The spacer hole 351 is formed at the center position C in the height direction of the spacer 35. The center position in the height direction of the spacer 35 coincides with the center position C in the height direction of the heat exchanger 100. Further, the height direction of the spacer 35 and the height direction of the spacer hole 351 coincide with each other.

  The spacer hole 351 is formed by the facing surface 35a. In other words, the facing surface 35a is a surface (inner wall) surrounding the collective space AR and facing the collective space AR. The width w351 of the spacer hole 351 is slightly larger than the diameter of the communication hole 34 as shown in FIG. Further, the size of the spacer hole 351 is smaller than the size of the end portion 11 (end surface 13) of the flat multi-hole tube 10. Specifically, as shown in FIG. 11, the width dimension w351 of the spacer hole 351 is smaller than the width dimension (thickness dimension) w10 of the flat multi-hole tube 10. Further, the height dimension h351 of the spacer hole 351 is smaller than the height dimension (dimension in the longitudinal direction of the end face 13) L10 of the flat multi-hole tube 10. Furthermore, the height dimension h351 of the spacer hole 351 is larger than the height dimension h12 of the portion where all the flow path holes 12a to 12i of the flat multi-hole tube 10 are formed. Therefore, in the flat multi-hole tube 10, the channel holes 12 a to 12 i formed in the end surface 13 are opposed to the spacer hole 351, and the edge portion of the end surface 13 is brought into contact with the spacer 35. Thus, the flow path holes 12a to 12i communicate with the collective space AR. The distance from the facing surface 35a located above or below to the end of the spacer 35 has a predetermined distance dimension h1.

  As shown in FIGS. 6 and 7, one surface of the spacer 35 is in contact with the flat portion of the communication hole forming portion 32. The other surface of the spacer 35 is in contact with the intervening plate 36 on both sides in the height direction. The other surface of the spacer 35 is in contact with the end surface 13 of the flat multi-hole tube 10 or the edge portion 65 of the insertion plate 60 at the center in the height direction (that is, the peripheral edge of the spacer hole 351). Specifically, the peripheral edge portion of the spacer hole 351 into which the insertion plate 60 is inserted is in contact with the edge portion 65. In other cases, the peripheral edge of the spacer hole 351 contacts the end face 13 of the flat multi-hole tube 10.

  Further, a predetermined gap dimension d1 is taken between the inner wall 35a of the spacer hole 351 and the side surface of the insertion plate 60 (see FIG. 13). Here, the predetermined gap dimension d1 is about 0.05 mm.

(4-3-2) Intervening Plate The intervening plate 36 is a flat plate member interposed between the spacer 35 and the joining member 37 (see FIGS. 5 and 9). The intervening plate 36 also extends in the longitudinal direction of the header 30. The intervening plate 36 is the same aluminum alloy as the headers 30 and 40.

  The intervening plate 36 has a thickness dimension t36 of about 2.5 mm to 3.0 mm (see FIG. 5). The longitudinal dimension of the interposition plate 36 is the same as the longitudinal dimension of the communication hole forming portion 32. The height dimension h36 of the interposed plate 36 is also the same as the height dimension h32 of the communication hole forming portion 32.

  As shown in FIG. 9, the insertion plate 36 is formed with an insertion hole (second insertion hole) 361 for inserting an end of the flat multi-hole tube 10. The opening shape of the insertion hole 361 is also rectangular or elliptical. A plurality of insertion holes 361 are formed side by side in the length direction of the intervening plate 36. Further, the insertion hole 361 is formed at the center position C in the height direction of the interposed plate 36. The center position C in the height direction of the intervening plate 36 coincides with the center position C in the height direction of the heat exchanger 100. Further, the height direction of the insertion hole 361 coincides with the longitudinal direction of the intervening plate 36.

  The insertion hole 361 is formed by the facing surface 36a. That is, the facing surface 36 a is an inner wall of the insertion hole 361. The facing surface 36a faces the side surface of the tube end portion 11 of the flat multi-hole tube 10 or the side surface of the inner end portion 62b of the insertion plate 60 described later. As shown in FIG. 9, the insertion hole 361 is larger than the spacer hole 351. Specifically, the width dimension w361 and the height dimension h361 of the insertion hole 361 are larger than the width dimension w351 and the height dimension h351 of the spacer hole 351. The distance from the facing surface 36a located above or below to the end of the interposition plate 36 has a predetermined distance dimension h2. The distance dimension h2 is smaller than the distance dimension h1 described above.

  A predetermined gap dimension d2 is provided between the inner wall 36a of the insertion hole 361 and the side surface of the flat multi-hole tube 10 inserted into the insertion hole 361 (see FIG. 12). A predetermined gap dimension d2 is also taken between the inner wall 36a of the insertion hole 361 and the side surface of the insertion plate 60 inserted into the insertion hole 361 (see FIG. 13). Here, the predetermined gap dimension d2 is about 0.1 mm.

(4-3-3) Joining member The joining member 37 is joined to the outer surface of the end part of the communicating hole formation part 32, the spacer 35, the interposition plate 36, and the flat multi-hole tube 10, and the communicating hole formation part 32 and the spacer 35 are joined. And a member for holding the intervening plate 36 and the flat multi-hole tube 10. The joining member 37 has a U-shape when viewed from the side, as shown in FIG. 2, by bending both ends in the height direction, which is a direction orthogonal to the longitudinal direction. The joining member 37 also extends in the longitudinal direction of the header 30. The bonding member 37 is a clad material similar to the spacer 35.

  The joining member 37 has a thickness dimension t37 of about 1.5 mm to 2.0 mm (see FIG. 5). The dimension in the longitudinal direction of the joining member 37 is substantially the same as the dimension in the longitudinal direction of the communication hole forming portion 32. The height dimension h37 of the joining member 37 is larger by the thickness dimension t37 than the height dimension h32 of the communication hole forming portion 32 (see FIG. 10).

  As shown in FIG. 10, a fitting hole (second insertion hole) 371 for fitting the tube end portion 11 of the flat multi-hole tube 10 is formed in the bonding member 37. The opening shape of the insertion hole 371 is also rectangular or elliptical. A plurality of insertion holes 371 are formed side by side in the length direction of the joining member 37. Further, the insertion hole 371 is formed at the center position C in the height direction of the joining member 37. The height direction of the insertion hole 371 coincides with the longitudinal direction of the joining member 37.

  The insertion hole 371 is formed by the facing surface 37a. That is, the facing surface 37 a is an inner wall of the insertion hole 371. The facing surface 37 a is a surface that faces the side surface of the end portion of the flat multi-hole tube 10. The width dimension w371 and the height dimension h371 of the insertion hole 371 are the same as the width dimension w361 and the height dimension h361 of the insertion hole 361. That is, the insertion hole 371 is larger than the spacer hole 351, and the width dimension w371 and the height dimension h371 of the insertion hole 371 are larger than the width dimension w351 and the height dimension h351 of the spacer hole 351. The distance from the facing surface 37a located above or below to the end of the joining member 37 has a predetermined distance dimension h3.

  A predetermined gap dimension d2 is also taken between the inner wall 37a of the insertion hole 371 and the side surface of the flat multi-hole tube 10 inserted into the insertion hole 371 (see FIG. 12). A predetermined gap dimension d2 is also taken between the inner wall 37a of the insertion hole 371 and the side surface of the insertion plate 60 inserted into the insertion hole 371 (see FIG. 13). The predetermined gap dimension d2 is about 0.1 mm as described above.

(5) Insertion plate The insertion plate 60 is a member for brazing without changing the relative position of each structural member of the heat exchanger 100. In other words, the insertion plate 60 is a member for maintaining the postures of the headers 30 and 40 and the flat multi-hole tube 10 until the constituent members of the heat exchanger 100 are joined by brazing. The insertion plate 60 is a metallic plate-like member such as aluminum or an aluminum alloy.

  As described above, the insertion plate 60 is disposed on both sides of the plurality of flat multi-hole tubes 10 in the longitudinal direction of the headers 30 and 40 (see FIG. 1). In addition, as described above, the insertion plate 60 extends in a direction orthogonal to the longitudinal direction of the headers 30 and 40, as with the plurality of flat multi-hole tubes 10.

  For example, as shown in FIGS. 3 and 7, the insertion plate 60 has an insertion plate central portion (main body portion) 61 and an insertion end portion 62. The insertion plate central portion 61 is located at the center in the longitudinal direction of the insertion plate 60. The insertion end portion 62 is located at both ends of the insertion plate 60 with the insertion plate central portion 61 interposed therebetween in the longitudinal direction. 3 and 7 is an imaginary line for identifying the insertion plate central portion 61 and the insertion end portion 62.

  The thickness direction t60 of the insertion plate 60 is about 1.0 to 2.5 mm, similar to the thickness dimension w10 of the flat multi-hole tube 10. The longitudinal dimension of the insertion plate 60 is longer than the longitudinal dimension of the flat multi-hole tube 10. Specifically, the insertion plate 60 is longer than the flat multi-hole tube 10 by the length L22 of the outer end 62b described later (see FIG. 7). Further, the height dimensions L20a and L20b of the insertion plate 60 are the same as the height dimension L10 of the flat multi-hole tube 10 except for the end portion in the longitudinal direction. Hereinafter, the insertion plate center portion 61 and the insertion end portion 61 will be described in detail.

(5-1) Insertion Plate Center Part The insertion plate center part 61 is a part located in the center in the longitudinal direction of the insertion plate 60 and has a flat part 64. The plane part 64 is rectangular and extends in the longitudinal direction and the height direction. The height direction is a direction orthogonal to the longitudinal direction in the horizontal plane, and is a vertical direction based on the heat exchanger 100 shown in FIG. The longitudinal dimension of the insertion plate central portion 61 is the same as the longitudinal dimension of the tube plane portion 14 of the flat multi-hole tube 10. Moreover, the dimension L20a of the insertion plate center part 61 in the height direction is the same as the height dimension L10 of the flat multi-hole tube 10 (see FIGS. 6 and 7).

  The insertion plate 60 is joined to the headers 30 and 40 so that the flat surface portion 64 of the central portion 61 of the insertion plate is parallel to the tube flat surface portion 14 of the flat multi-hole tube 10. The flat portion 64 is joined to the peak portion 21 or the valley portion 22 of the heat transfer fin 20.

(5-2) Insertion End Part The insertion end part 62 is both ends of the insertion plate 60 in the longitudinal direction. The insertion end portion 62 is a portion that is inserted into the headers 30 and 40 and joined to the headers 30 and 40. As shown in FIGS. 3 and 7, the insertion end portion 62 includes an inner end portion (intermediate portion) 62 a and an outer end portion (projection portion) 62 b. That is, the dimension L23 of the insertion end 62 in the longitudinal direction of the insertion plate 60 is the sum of the dimension L21 in the longitudinal direction of the inner end 62a and the dimension L23 in the longitudinal direction of the outer end 62b, as shown in FIG. (L23 = L21 + L22). The insertion end portion 62 has a shape in which the outer end portion 62b is convex in plan view.

(5-2-1) Inner edge part The inner edge part 62a is a part located inside the outer edge part 62b in the longitudinal direction of the insertion plate 60. The inner end portion 62 a is a portion adjacent to the insertion plate central portion 61 in the longitudinal direction of the insertion plate 60. The inner end 62a is a portion to be joined to an intervening plate 36 and a joining member 37 which will be described later.

  The length dimension L21 of the inner end portion 62a is the sum (L21 = t36 + t37) of the thickness dimension t36 of the intervening plate 36 and the thickness dimension t37 of the joining member 37 (see FIGS. 5 and 7). The length direction of the inner end 62 a corresponds to the longitudinal direction of the insertion plate 60. In the present embodiment, the length dimension L21 of the inner end 62a is approximately 4.0 mm to 5.0 mm.

  Moreover, the height dimension L20a and the width dimension w60a of the inner side edge part 62a are the same as the height dimension L10 and the width dimension w10 of the edge part 11 (end surface 13) of the flat multi-hole pipe 10 (refer FIG. 3). As described above, the height dimension L20a and the width dimension w60a of the inner end portion 62a are predetermined between the side surface of the inner end portion 62a and the inner wall 36a of the insertion hole 361 and the inner wall 37a of the insertion hole 371. It is assumed that the gap dimension d2 is determined (see FIG. 13). The predetermined gap dimension d2 is about 0.1 mm as described above.

  The inner end portion 62a has an edge portion 65 having a surface parallel to an end surface 63 of an outer end portion 62b described later. The edge part 65 is located in the height direction both sides of the inner side edge part 62a, as shown in FIG.7 and FIG.13. The edge portion 65 is in a position where it collides with the plane of the spacer 35 described later, and is joined to the plane of the spacer 35.

(5-2-2) Outer end portion The outer end portion 62 b is an end portion located on the outermost side in the longitudinal direction of the insertion plate 60. The outer end portion 62b is a portion joined to a spacer 35 described later. In other words, the outer end portion 62 b is a portion that is inserted into the spacer hole 351 and is restrained by the inner wall 35 a of the spacer hole 351.

  As shown in FIG. 7, the length dimension L22 of the outer end 62b is the same as the thickness dimension t35 of the spacer 35 (L22 = t35). The length direction of the outer end portion 62 b also corresponds to the longitudinal direction of the insertion plate 60. In the present embodiment, the length L22 of the outer end 62b is approximately 2.0 mm to 3.0 mm.

  Further, the outer end 62b is smaller in size than the inner end 62a. Specifically, the height dimension L20b and the width dimension w60b of the outer end portion 62b are smaller than the height dimension L20a and the width dimension w60a of the inner end portion 62a. Further, as shown in FIG. 11, the size of the outer end 62 b is smaller than the size of the spacer hole 351. Specifically, the height dimension L20b and the width dimension w60b of the outer end portion 62b are smaller than the height dimension h351 and the width dimension w3531 of the spacer hole 351. As described above, the height dimension L20b and the width dimension w60b of the outer end portion 62b are such that a predetermined gap dimension d1 is formed between the inner wall 35a of the spacer hole 351 and the side surface of the outer end portion 62b. Shall be determined as follows. The predetermined gap dimension d1 is about 0.05 mm (see FIG. 13).

  The outer end 62 b has an end face 63. The end surface 63 is a surface extending in the width direction w60b and the height direction L20b of the insertion plate 60. The end face 63 is at a position where it collides with the plane of the communication hole forming portion 32. That is, the end surface 63 is joined to the communication hole forming part 32.

(5-3) Insertion Spaces Formed in the Connection Portions Insertion spaces P1 and P2 for inserting the flat multi-hole tube 10 or the insertion plate 60 into the connection portion 50 by the joining member 37, the interposed plate 36, and the spacer 35. Is formed. As shown in FIG. 14, the insertion spaces P1 and P2 include a first insertion space P1 and a second insertion space P2. The first insertion space P <b> 1 is a space for inserting the insertion plate 60. The second insertion space P <b> 2 is a space for inserting the flat multi-hole tube 10.

  The first insertion space P1 is a space that includes the second insertion space P2. Specifically, in the first insertion space P1, a space near the opening of the first insertion space P1 is the second insertion space P2.

  More specifically, the first insertion space P1 is a space formed by the inner wall 37a of the insertion hole 371, the inner wall 36a of the insertion hole 361, and the inner wall of the spacer hole 35a. The depth dimension L31 of the first insertion space P1 (that is, the length in which the insertion plate 60 can be inserted) L31 is the thickness dimension t35 of the spacer 35, the thickness dimension t36 of the interposition plate 36, and the thickness dimension t37 of the joining member 37. (L31 = t35 + t36 + t37). The depth dimension L31 of the first insertion space P1 is the same as the length dimension L23 of the insertion end portion 62 of the plate 60 (L31 = L23).

  The second insertion space P2 is a space formed by the inner wall 37a of the insertion hole 371 and the inner wall 36a of the insertion hole 361. The depth L32 of the second insertion space P2 (that is, the length in which the flat multi-hole tube 10 can be inserted) dimension L32 is the sum of the thickness dimension t36 of the interposition plate 36 and the thickness dimension t37 of the joining member 37 (L32). = T35 + t37). The depth dimension L32 of the second insertion space P2 is the same as the length dimension L21 of the inner end portion 62a included in the insertion end portion 62 of the plate 60 (L32 = L21). The depth dimension L32 of the second insertion space P2 is the same as the length dimension L11 of the tube end portion 11 of the flat multi-hole tube 10 (L32 = L11).

  That is, the distance at which the insertion plate 60 can be inserted into the connecting portion 50 is longer than the distance at which the flat multi-hole tube 10 can be inserted into the connecting portion. In other words, the insertion plate 60 is inserted into the connecting portion 50 deeper than the flat multi-hole tube 10.

(6) Features (6-1)
The heat exchanger 100 according to the above embodiment is integrated by brazing. Generally, a heat exchanger is brazed by assembling components and then putting the assembled components into a furnace. Specifically, a plurality of flat multi-hole tubes are inserted into the header and assembled as shown in FIG. 2 while being laid on a conveyor so that the longitudinal direction of the header is horizontal to the horizontal plane. The components are put into the furnace. Here, before the header and the flat multi-hole tube are brazed, a gap having a dimension in consideration of expansion of the flat multi-hole tube in the furnace is provided between the header and the flat multi-hole tube inserted into the header. It is formed (second gap dimension d2). The header and the flat multi-hole tube freely move between the gaps of the second gap dimension d2 before brazing. Accordingly, the header and the flat multi-hole tube may be brazed in a state where the header and the flat multi-hole tube are changed to a relative position different from a desired relative position. Specifically, the height direction center position C (see FIG. 2) of the header is inclined with respect to the horizontal plane. Thereby, the flow hole of the flat multi-hole tube and the communication hole of the header are not preferably communicated with each other, and the performance of the heat exchanger may be deteriorated.

  However, in the heat exchanger 100 according to the above embodiment, the insertion plate 60 is inserted into the headers 30 and 40 together with the flat multi-hole tube 10. The insertion plate 60 is inserted into the first insertion space P <b> 1 formed by the joining member 37, the interposition plate 36, and the spacer 35. The flat multi-hole tube 10 is inserted into the second insertion space P <b> 2 formed by the joining member 37 and the interposition plate 36. Specifically, the insertion end portion 62 is inserted into the insertion plate 60 in the order of the insertion hole 371, the insertion hole 361, and the spacer hole 351. The end surface 63 of the insertion plate 60 is brought into contact with the communication hole forming portion 32. Further, the side surface of the insertion plate 60 is restrained by the facing surface 37 a of the insertion hole 371, the facing surface 36 a of the insertion hole 361, and the facing surface 35 a of the spacer hole 351. On the other hand, the tube end portion 11 of the flat multi-hole tube 10 is inserted in the order of the insertion hole 371 and the insertion hole 361, and the side surface of the tube end portion 11 is formed by the opposing surface 36 a of the insertion hole 361 and the opposing surface 35 a of the spacer hole 351. Be bound. The flat multi-hole tube 10 also has the peripheral edge of the end face 13 in contact with the spacer 35, and the portion where the channel holes 12 a to 12 i are formed is opposed to the opening of the spacer hole 351.

  The flat multi-hole tube 10 needs to communicate with the flow path holes 12a to 12i. Therefore, it is necessary to fasten the end surface 13 of the flat multi-hole tube 10 before the collective space AR. Therefore, the end portion 11 of the flat multi-hole tube 10 cannot be inserted into the spacer hole 351. However, the insertion plate 60 does not require the collective space AR. Therefore, the insertion plate 50 can be inserted into the space formed by the inner wall 35a of the spacer hole 351. That is, the insertion plate 60 can be inserted deeper into the headers 30 and 40 than the flat multi-hole tube 10. The headers 30 and 40 are balanced by the insertion plate 60 and maintain the posture. Therefore, even before brazing, the relative position between the insertion plate 60 and the headers 30 and 40 is unlikely to change. In other words, the headers 30 and 40 maintain the posture with respect to the insertion plate 60. Thereby, the relative position of the headers 30 and 40 and the flat multi-hole tube 10 can also be maintained.

(6-2)
Further, in the heat exchanger 100 according to the above embodiment, the gap dimension (first gap dimension) d1 formed between the inner wall 35a of the spacer hole 351 and the side surface of the outer end 62b of the insertion plate 60 is: Dimensions of the gap formed between the inner walls 36a, 37a of the insertion hole 361 and the insertion hole 371 and the side surface of the portion other than the outer end 62b of the insertion plate 60 or the side surface of the flat multi-hole tube 10 (second clearance) Dimension) is smaller than d2. Since the insertion plate 60 is firmly fixed to the headers 30 and 40 in the first insertion space P <b> 1, the headers 30 and 40 are configured not to move relative to the insertion plate 60. That is, the posture of the headers 30 and 40 is not changed by the insertion plate 60 being more firmly joined to the headers 30 and 40. Thereby, the relative position of the headers 30 and 40 before brazing and the flat multi-hole tube 10 can also be maintained, and as a result, the performance of the heat exchanger 100 can be maintained.

(6-3)
In the said embodiment, the dimension L20a, w60a of the inner side edge part 62a of the insertion plate 60 and the dimension L20b, w60b of the outer side edge part 62b are made into a different dimension. That is, the shape of the end 62 of the insertion plate 60 is configured such that the outer end 62 b can be inserted into the spacer hole 351 and the inner end 62 a can be inserted into the insertion hole 371 and the insertion hole 361. In other words, the outer end portion 62 b is a convex portion of the insertion plate 60. Here, a gap dimension d1 formed between the side surface of the outer end portion 62b and the facing surface 35a of the spacer hole 351 is between the side surface of the inner end portion 62a and the facing surfaces 37a and 36a of the insertion hole 371 and the insertion hole 361. It is configured to be smaller than the gap dimension d2 that can be reduced. That is, even before brazing, the outer end 62 b hardly changes the relative position with respect to the spacer 35. Thereby, since the attitude | position of the headers 30 and 40 does not fluctuate until brazing, the relative position of the headers 30 and 40 and the flat multi-hole tube 10 can also be maintained.

(7) Modification (7-1) Modification A
In the above embodiment, the dimensions (width dimension and height dimension) of the holes 351, 361, 371 formed in the members 35, 36, 37 constituting the connecting portion 50 may be substantially the same (see FIG. 15). Even in this case, the insertion plate 60 is inserted deeply into the headers 30 and 40, so that the relative position between the insertion plate 60 and the headers 30 and 40 can be maintained.

  At this time, the dimension of the outer end portion 62b of the insertion plate 60 may be larger than the dimension of the inner end portion 62a. Specifically, the height dimension L20b and the width dimension w60b of the outer end portion 62b are made larger than the height dimension L20a and the width dimension w60a of the inner end portion 62a. Also by this, the gap dimension d1 between the side surface of the distal end portion (outer end portion) 62b of the insertion plate 60 and the inner wall of the spacer hole 351 can be made smaller than the other gap dimension d2. As a result, the headers 30 and 40 are not easily tilted with respect to the insertion plate 60, and as a result, the postures of the headers 30 and 40 can be maintained.

(7-2) Modification B
In the joining member 37 according to the above embodiment, the size of the insertion hole 371 may be smaller than the size of the insertion hole 361. As a result, the gap d2 formed between the side surface of the flat multi-hole tube 10 or the insertion plate 60 and the inner wall 371a of the insertion hole 371 is reduced, so that the headers 30 and 40 are attached to the flat multi-hole tube 10 and the insertion plate 60. It can be made difficult to move.

(7-3) Modification C
In the above embodiment, the interposition plate 36 is provided between the spacer 35 and the joining member 37. Here, the joining member 37 and the intervening plate 36 may have an integral configuration.

(7-4) Modification D
In the above embodiment, the case where the dimension of the spacer hole 351 is smaller than the dimension of the end 11 of the flat multi-hole tube 10 is taken as an example, but the dimension of the spacer hole 351 is the same as that of the end 11 of the flat multi-hole tube 10. It may be larger than the dimension. Even in this case, the inclination of the headers 30 and 40 can be suppressed by the insertion plate 60.

  Even in this case, the dimension of the insertion plate 60 is such that the gap d1 formed between the tip side surface of the insertion plate 60 and the inner wall 35a of the spacer hole 351 is smaller than the other gaps d2. May be determined. Thereby, the inclination of the headers 30 and 40 can be further prevented. As a result, the relative position between the headers 30 and 40 and the flat multi-hole tube 10 can be maintained.

100 heat exchanger 10 flat multi-hole tube (tube)
DESCRIPTION OF SYMBOLS 11 Pipe end part 12a-12i Channel hole 13 End surface 14 of flat multi-hole pipe Flat part 20 of flat multi-hole pipe Heat transfer fin 30, 40 Header 31 Cylindrical part 31a Main flow path 31b Channel wall 32 Communication hole formation part 35 Spacer 35a Opposing surface, inner wall 351 Spacer hole (first insertion hole)
36 Intervening plate (fixing member)
36a Opposing surface, inner wall 361 insertion hole (second insertion hole)
37 Joint member 37a Opposing surface, inner wall 371 Insertion hole (second insertion hole)
50 connecting part 60 insertion plate (plate)
61 Center (body)
62 Insertion end 62a Inner end (intermediate part)
62b Outer end (projection)
AR collective space d1 first gap dimension d2 second gap dimension P1 first insertion space P2 second insertion space

JP 2006-284133 A

Claims (4)

A header (30) formed with a main channel (31b) for flowing refrigerant;
A plurality of tubes (10) stacked in the length direction of the header and having an end inserted into the header;
A plate (60) with an end inserted into the header, together with the plurality of tubes;
A heat exchanger integrated by brazing,
The header has a connecting portion (50) that forms a first insertion space (P1) into which the plate is inserted and a plurality of second insertion spaces (P2) into which the plurality of tubes are respectively inserted.
The depth of the first insertion space (L31) is much larger than the depth of the second insertion space (L32),
The header further includes a communication hole forming portion (32) in which a communication hole (34) communicating with the main flow channel from a direction intersecting the axial direction of the main flow channel is formed,
The end of the tube has an end surface (11) in which a plurality of flow passage holes (12) through which the refrigerant passes are formed in a first direction,
The connecting portion is
A joining member (37) for joining the connecting hole forming part and the end of the tube;
A spacer (35) disposed between the communication hole forming portion and the end face of the tube and forming a collecting space for collecting the refrigerant;
A fixing member (36) that is disposed between the joining member and the spacer and that fixes the plate and the tube extending from the outside of the joining member toward the spacer;
Have
The first insertion space is formed by the joining member, the fixing member, and the spacer,
The second insertion space is formed by the joining member and the fixing member.
Heat exchanger. The first insertion space is a space including the second insertion space.
The heat exchanger according to claim 1 . The end of the plate is
A protrusion (62b) located at the end in the length direction of the plate and having a first dimension different from the dimension of the main body;
An intermediate portion (62a) located between the protrusion and the main body in the length direction of the plate and having the same second dimension as the main body;
Have
The protrusion is fixed by a first insertion hole (351) which is a hole constituting the first insertion space, and the intermediate part is a second insertion which is a hole constituting the second insertion space. Fixed by holes (361, 371),
The heat exchanger according to claim 2 . The dimension (d1) of the first gap formed between the side surface of the protruding portion and the inner wall (35a) of the first insertion hole is the same as the side surface of the intermediate portion and the inner wall (36a) of the second insertion hole. 37a) is smaller than the dimension (d2) of the second gap formed between
The heat exchanger according to claim 3 .

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