JP4418246B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger such as a condenser used in a vehicle air conditioner or the like.

  Conventional heat exchangers include those disclosed in Patent Documents 1 to 3. This type of heat exchanger is configured by connecting and connecting both end openings of flat tubes arranged in multiple stages to a pair of opposing header tanks. Corrugated outer fins are interposed between the flat tubes arranged in multiple stages.

  Both header tanks are provided with a pipe and a closing member that closes both ends of the pipe. The pipe is provided with a plurality of multi-stage tube insertion ports for inserting tubes. In addition, a partition plate that divides the interior in the longitudinal direction is provided in the pipe.

  In the heat exchanger configured as described above, the refrigerant introduced into one header tank through the refrigerant inlet connector flows in the tube so as to meander between one header tank and the other header tank. Thus, the refrigerant is discharged through a refrigerant outlet connector fixed to any one of the header tanks. At this time, the refrigerant flowing in the heat exchanger is heat-exchanged with the air passing through the gap between the outer fins between the tubes. For example, when used as a radiator or condenser, the refrigerant is cooled, and when used as an evaporator, the refrigerant is heated.

In the heat exchanger manufacturing method, in a state where the tubes and the outer fins are alternately laminated, the tubes are inserted into the tube insertion holes of the header tank to form a temporary assembly, and the temporary assembly is placed in a furnace. By melting the brazing material on the surface of the core material of each member at a temperature and then cooling it, the respective members are fixed integrally with the brazing material to obtain a desired heat exchanger.

Japanese Patent Laid-Open No. 7-27496 JP-A-10-227593 JP 2003-94135 A

  In the prior art, since each member constituting the heat exchanger has a brazing material layer on the outer peripheral surface, the melted brazing material flows in the entire heat exchanger during brazing. In particular, the melted brazing material flows into the joint surface where the various parts exist by capillary action.

  Here, in general, there are many joint surfaces between the tube and the outer fin in the heat exchanger core part, and the total joint area in the heat exchanger core part is considerably larger than the total joint area in the header tank. Therefore, at the time of brazing, there is a concern that the brazing material of the header tank will be washed away to the heat exchanger core. In this case, (i) stability of brazing between members constituting the header tank, (ii) stability of brazing between the header tank and the tube, and (iii) stability of brazing between the header tank and the connector. There is a possibility that the property may be lowered.

  The present invention has been made based on such a conventional technique, and its purpose is to prevent the flow of brazing material between the heat exchanger core and the header tank during brazing. .

The invention according to claim 1 is a heat exchange comprising an outer fin, a plurality of tubes alternately stacked with the outer fin, and a header tank in which an opening end portion of each tube is inserted to communicate with each tube. The header tank is composed of a box-shaped first member and a box-shaped second member having openings in the direction of combination with each other, and the second member inserts an end portion of the tube into the tube insertion port. The first member is provided with the tube insertion port, the first member is not provided with a brazing material layer over the entire inner peripheral surface and a brazing material layer is provided over the entire outer peripheral surface, and the first member and the Both members in a state in which the second member is fitted into the inner peripheral surface of the first member so that the brazing material for joining the second member does not contact the brazing material layer on the outer peripheral surface of the first member. Of the first member End is separated from the outer peripheral surface of the second member, characterized in that a flared portion which is flared tapered section above the terminal portion.

According to another aspect of the invention, it a heat exchanger according to claim 1, brazing material for bonding the first member and the second member is a brazing material layer on the outer peripheral surface of said second member It is characterized by.

The invention according to claim 3 is a heat exchange comprising an outer fin, a plurality of tubes alternately stacked with the outer fin, and a header tank in which an opening end portion of each tube is inserted to communicate with each tube. The header tank includes a pipe composed of a first member and a second member that are combined with each other, and a closing member that closes both ends of the pipe, and the second member serves as an end of the tube. The first member without the tube insertion port to be inserted has the tube insertion port, the first member has no brazing material layer over the entire inner peripheral surface and a brazing material layer over the entire outer peripheral surface, The brazing material for joining the first member and the second member and the brazing material for joining the pipe and the closing member do not come into contact with the brazing material layer on the outer peripheral surface of the first member. Of the first member The respective members are brazed and joined in a state in which the second member is fitted into the peripheral surface and the closing member is fitted into the inner peripheral surface of the pipe composed of the first member and the second member. The terminal of the first member is separated from the outer peripheral surface of the second member, and a widened portion that is widened in a tapered shape in cross section is provided at the tip end portion .

Invention of Claim 4 is a heat exchanger of Claim 3 , Comprising: The brazing material for joining the inner peripheral surface of the said 1st member and the said 2nd member is a brazing material of the outer peripheral surface of the said 2nd member It is a layer.

A fifth aspect of the present invention is the heat exchanger according to the third or fourth aspect , wherein the closing member is plate-shaped and includes a brazing material layer on at least one surface.

Invention of Claim 6 is the heat exchanger in any one of Claims 1-5 , Comprising: The partition which divides | segments the internal space of the said header tank into several chambers in the longitudinal direction in the said header tank A member is mounted, and the brazing material for joining the pipe and the partition member does not come into contact with the brazing material layer on the outer peripheral surface of the first member, and includes the first member and the second member. Each member is brazed and joined in a state in which the partition member is fitted into the inner peripheral surface of the pipe.

The invention according to claim 7 is the heat exchanger according to claim 6 , wherein the partition member is plate-shaped and includes a brazing material layer on at least one surface.

According to the invention of claim 1, the brazing material for joining the inner peripheral surface of the first member and the second member by the inner peripheral surface of the first member not provided with the brazing material layer is the brazing material layer of the tube. It is divided. Thereby, at the time of brazing, the brazing material for joining the inner peripheral surface of the first member and the second member does not flow away to the tube. In the first aspect, the brazing material for joining the first member and the second member may be formed integrally with the second member as a raw material in advance, or the first member or the brazing member before brazing What applied to the 2nd member may be used. In the invention of claim 1, the header tank has a box-shaped first member and a box-shaped second member. The joint surface of the second member with the first member may be the inner peripheral surface of the second member, the outer peripheral surface of the second member, or the end surface of the second member. Furthermore, even if the first member is thin, when the brazing material is melted during brazing, the brazing material layer on the outer circumferential surface of the first member and the brazing material on the outer circumferential surface of the second member are passed through the terminal portion of the first member. It is possible to reliably prevent connection with the material layer. It is also effective when the first member is not thin.

According to the invention of claim 2 , in addition to the effect of the invention of claim 1 , the first member and the second member are joined by the brazing material layer of the second member. Therefore, it is not necessary to apply a brazing material for joining the first member and the second member to the first member or the second member, and the manufacturing process is simplified.

The invention of claim 3 is a structure in which the header tank is composed of a pipe composed of a first member and a second member that are combined with each other, and a closing member that closes both ends of the pipe. Therefore, according to the invention of claim 3, as in the invention of claim 1, the brazing material for joining the first member and the second member does not flow away into the tube. According to a third aspect of the present invention, the first and second members are arranged so that the brazing material for joining the first and second members and the closing member does not contact the brazing material layer on the outer peripheral surface of the first member. A closing member is fitted into the inner peripheral surface of the pipe. Therefore, the brazing material for joining the first and second members and the closing member is separated from the brazing material layer of the tube by the inner peripheral surface of the first member that does not include the brazing material layer. As a result, the brazing material for joining the inner peripheral surfaces of the first and second members and the closing member during brazing does not flow away to the tube through the inner peripheral surface of the first member. In addition, similarly to the first aspect of the invention, even if the first member is thin, when the brazing material melts during brazing, the brazing material on the outer peripheral surface of the first member passes through the terminal portion of the first member. It can be reliably prevented that the layer and the brazing material layer on the outer peripheral surface of the second member are connected. It is also effective when the first member is not thin.

As described above, according to the third aspect of the invention, at the time of brazing, the brazing material for joining the first member and the second member and the first and second members and the closing member are joined. Raw material does not flow into the tube.

In the third aspect, a brazing material for joining a first member and a second member in advance may be one integrally formed as the second member material, also the first member or brazing before What applied to the 2nd member may be used. Further, the brazing material for joining the first and second members and the closing member may be previously formed integrally with the closing member as a raw material, or the first and second members or the closing member before brazing. What was apply | coated to may be sufficient.

According to the invention of claim 4 , in addition to the effect of the invention of claim 3 , the inner peripheral surface of the first member and the second member are joined by the brazing material layer of the second member. Therefore, it is not necessary to apply a brazing material for joining the first member and the second member to the first member or the second member, and the manufacturing process is simplified.

According to the invention of claim 5 , in addition to the effect of the invention of claim 3 or claim 4 , the brazing material layer of the closing member acts as a brazing material for joining the first and second members and the closing member. To do. Therefore, it is not necessary to apply a brazing material for joining the first and second members and the closing member to the first and second members or the closing member before brazing, and the manufacturing process is simplified. Note that the brazing material layer of the closing member may be at least one of the front and back surfaces of the closing member.

According to the invention of claim 6 , in addition to the effect of the invention of any one of claims 1 to 5 , the brazing material for joining the partition member in the pipe is the brazing material on the outer peripheral surface of the first member. Since it does not contact the layer, the brazing material for joining the partition member in the pipe is separated from the brazing material layer of the tube. As a result, the brazing material for joining the inner peripheral surfaces of the first and second members and the partition member during brazing cannot reach the tube through the inner peripheral surface and the outer peripheral surface of the first member. As described above, according to the sixth aspect of the present invention, in the structure in which the partition member is provided, the brazing material for joining the first and second members and the partition member is not lost to the tube during brazing.

In addition, in this claim 6 , the brazing material for joining the first and second members and the partitioning member may be previously formed integrally with the partitioning member as a material, or before the brazing, What applied to the 2nd member or the partition member may be used.

According to the invention of claim 7 , in addition to the effect of the invention of claim 6 , the brazing material layer of the closing member acts as a brazing material layer for joining the first and second members and the closing member. Therefore, it is not necessary to apply a brazing material for joining the first and second members and the closing member to the first and second members or the closing member before brazing, and the manufacturing process is simplified. Note that the brazing material layer of the closing member may be at least one of the front and back surfaces of the closing member.

Hereinafter, an embodiment and a reference example of the present invention will be described with reference to the drawings.

First Reference Example : FIGS. 1 to 6 show a heat exchanger according to a first embodiment. In addition, the heat exchanger of this embodiment is utilized as a condenser which condenses while cooling the gas-phase refrigerant | coolant which distribute | circulates an inside.

"Overall structure of heat exchanger"
As shown in FIG. 1, the heat exchanger 1 of the first embodiment includes a plurality of outer fins 3, 3,... And a plurality of outer fins 3, 3,. The flat tubes 5, 5, and the outer fins 3, 3,... And the reinforcing side plates 11, 11 disposed on the outermost side in the stacking direction of the tubes 5, 5,. , And a pair of header tanks 7 and 9 that are communicated with the tubes 5 by inserting both open end portions of the tubes 5.

  A refrigerant inlet connector 15 is attached to the header tank 7 (left side in FIG. 1), and a refrigerant outlet connector 17 is attached to the header tank 9 (right side in FIG. 1). A partition member 27 that divides the header tanks 7 and 9 into a plurality of rooms is fitted in the header tanks 7 and 9.

  When the refrigerant is introduced into the header tank 7 from a refrigerant inlet side pipe (not shown) through the refrigerant inlet connector 15, the refrigerant passes through the tubes 5, 5,... So as to meander between the header tanks 7, 9. After the circulation, the refrigerant is finally led from the header tank 9 to the refrigerant outlet side pipe (not shown) through the refrigerant outlet connector 17. At this time, heat exchange is performed between the refrigerant flowing inside the tube 5 and the air flowing outside the tube 5.

"Header tank structure"
Next, the header tanks 7 and 9 will be mainly described in detail with reference to FIGS.

  Each of the header tanks 7 and 9 has a rectangular tube-shaped pipe 19 formed by combining the first member 21 and the second member 23 divided along the longitudinal direction, and both open end portions 19a and 19a of the pipe 19. The closing members 25 and 25 are closed. A partition member 27 that divides the internal space into a plurality of rooms in the longitudinal direction is disposed inside the header tanks 7 and 9.

  The first member 21 and the second member 23 are both formed in a U-shaped cross section.

  Specifically, the first member 21 includes a flat plate-like base portion 29 that is orthogonal to the longitudinal direction of the tube 5, and a pair of straight portions 31, 31 that are provided in a substantially orthogonal direction from both ends in the width direction of the base portion. The cross section is substantially U-shaped. The base 29 of the first member 21 includes tube insertion ports 33, 33,... For inserting the open end portions of the tubes 5. On the other hand, as with the first member 21, the second member 23 also has a flat plate-like base portion 35 that is orthogonal to the longitudinal direction of the tube 5, and a pair of straight members that protrude from both ends of the base portion 35 in the substantially orthogonal direction. The sections 37 and 37 are provided and have a substantially U-shaped cross section. The base 35 of the second member has an opening (not shown), and is attached in a state where the cylindrical portion 41 of the refrigerant inlet connector 15 (or the refrigerant outlet connector 17) is inserted into the opening.

  In this example, the width dimension of the first member 21 (the interval between the pair of straight portions 31, 31) is formed wider than the width dimension of the second member 23 (the interval between the pair of straight portions 37, 37). . The two members 21 and 23 are brazed and joined together with the outer peripheral surfaces of the straight portions 37 and 37 of the second member 23 fitted into the inner peripheral surfaces of the straight portions 31 and 31 of the first member 21.

  The base 35 of the second member 23 is provided with a support hole 43 that supports the protrusion 26 a of the closing member 25. In addition, support grooves 45 and 45 that support the wing portions 26 b and 26 b of the closing member 25 are provided in the straight portions 37 and 37 of the second member 23. The closing member 25 is positioned at a predetermined position by the support hole 43 and the support grooves 45, 45 of the second member 23. In this example, the partition member 27 also has the same shape as the closing member 25, and the partition member 27 also includes a protrusion 28a and a wing portion 28b, and a support hole (not shown) formed in the second member 23. It is positioned at a predetermined position by the support groove.

  Next, the material of the header tanks 7 and 9 will be mainly described.

  The material of the first member 21 is one in which a brazing material layer is integrally formed on one of the front and back sides of the core material 21a, and the first member 21 formed into a predetermined shape (U shape) is an outer peripheral surface of the core material 21a. A brazing material layer 21c is provided and no brazing material layer is provided on the inner peripheral surface.

  The material of the second member 23 is one in which the brazing material layer 23c is integrally formed on the entire one surface 23c of the front and back surfaces of the core material 23a, and the second member 23 formed into a predetermined shape (U-shape) The core material 23a includes a brazing material layer 23c on the outer peripheral surface.

  The material of the closing member 25 is obtained by integrally molding the brazing material layers 25b and 25c on the entire front and back surfaces of the core material 25a (FIG. 4).

  The material of the partition member 27 is obtained by integrally molding the brazing material layers 27b and 27c on the entire front and back surfaces of the core material 27a (FIG. 4).

  Thus, when the members of the header tanks 7 and 9 (the first member 21, the second member 23, and the closing member 25) are combined, a brazing material layer exists between the joining surfaces of the members, and the members are combined. In this state, the members of the header tanks 7 and 9 are integrally fixed by brazing at a predetermined temperature.

Note that the closing member 25 and the partition member 27 do not have a brazing material layer on their peripheral surfaces (surfaces that contact the inner peripheral surfaces of the first member 21 and the second member 23 constituting the pipe). The brazing material layers 25b and 25c on the front and back surfaces of the closing member 25 and the brazing material layers 27b and 27c on both the front and back surfaces of the partition member 27 are melted and enter the peripheral surface by capillary action. By this. The closing member 25 and the partition member 27 are brazed with the first member 21 and the second member 23.
"Tube structure"
5 and 6 show a tube. The tube 5 has a cylindrical shape, and is brazed to the header tanks 7 and 9 with both ends inserted into the tube insertion ports 33 of the header tanks 7 and 9. Inside the tube 5, a wavy inner fin is provided. ,
Hereinafter, the manufacturing process of the tube 5 will be described with reference to FIG. First, as a raw material 5M of the tube 5, a single long plate-like metal thin plate 5M in which a brazing material layer 5c is integrally formed on the entire front or back surface of the core material 5a is prepared.

  Next, as shown in FIG. 6 a, both end portions in the width direction of the long sheet-like metal thin plate 5 </ b> M as a material are wound inward to form the joint portions 47 and 47.

  Next, the material 5M is folded in two along the center line along the longitudinal direction so that the brazing material layer 5c is located on the outer peripheral surface side of the tube 5, and the joint portions 47 and 47 as the folded end portions are folded together. Use a tube. At this time, the inner fins 49 are inserted into the tube 5 as shown in FIG. As shown in FIG. 5, the material of the inner fin 49 is obtained by integrally forming raw material layers 49b and 49c on both the front and back surfaces of the core material 49a. In the present invention, a brazing material layer may be provided on the inner peripheral surface of the tube 5 and an inner fin 49 having no brazing material layer on the front and back surfaces may be used.

  Finally, when brazing the entire heat exchanger 1, the joint portions 47, 47 of the tube 5 are brazed, and the inner peripheral surface of the tube 5 and the inner fin 49 are brazed. Thereby, the tube 5 is completed. At the same time, the outer peripheral surface of the tube 5 and the outer fin 3 are brazed, and the outer peripheral surface of both ends of the tube 5 and the inner peripheral edge of the tube insertion port 33 of the header tanks 7 and 9 are brazed. In this embodiment, the material of the outer fin 3 is one in which a brazing material layer is integrally formed on both the front and back surfaces of the core material.

"Manufacturing process of heat exchanger"
Next, the manufacturing process of the heat exchanger 1 of this reference example is demonstrated easily.

  First, the outer fin 3, tube 5, inner fin 49, header tank 7 members (first member 21, second member 23, and closing member 25), partition members 27, connectors 15 and 17, and side members made of a predetermined material. Plates 11 and 11 are prepared.

  Next, each member is processed into a predetermined shape.

  Next, all the members are combined and temporarily fixed with a predetermined jig or the like to form a temporary assembly.

  Next, the temporary assembly is sintered at a predetermined temperature in a furnace, and the members are integrally brazed. That is, each member is fixed integrally by melting the brazing material layer of each member of the temporary assembly at a predetermined temperature and then cooling.

"Action"
According to the heat exchanger of the first reference example ,
(I) A structure in which the first member 21 and the second member 23 are joined by brazing in a state where the second member 23 is fitted on the inner peripheral surface of the first member 21 of the header tanks 7 and 9. The brazing material 23 c for joining the first member 21 and the second member 23 is separated from the brazing material layer of the tube 5 by the inner peripheral surface of the first member 21 that does not include a layer. Thereby, at the time of brazing, the brazing material 23c for joining the first member 21 and the second member 23 does not flow away from the inner peripheral surface side of the first member 21 to the tube 5.

(Ii) Also, the brazing material 23c for joining the first member 21 and the second member 23 to the end of the first member 21 not provided with the brazing material layer (the brazing material flow blocking portion) It is separated from the brazing material layer 21c on the outer peripheral surface of the first member 21 continuing to the material layer. Thereby, at the time of brazing, the brazing material 23c for joining the first member 21 and the second member 23 does not flow away from the outer peripheral surface side of the first member 21 to the tube 5.

(Iii) Further, in the pipe 19 composed of the first member 21 and the second member 23, the brazing material layers 25 b and 25 c of the closing member 25 are not in contact with the brazing material layer 21 c on the outer peripheral surface of the first member 21. A closing member 25 is fitted on the peripheral surface. Therefore, the brazing members 25b and 25c of the closing member 25 (the brazing members 25b and 25c for joining the first member 21 and the second member 23 and the closing member 25) of the first member 21 that does not include the brazing material layer. By being separated from the brazing material layer 5c of the tube 5 by the inner peripheral surface and the terminal, the tube 5 will not be washed away during brazing. (At the time of brazing, the brazing material 23c on the outer peripheral surface of the second member 23 also flows on the brazing material layers 25b and 25c of the closing member 25 to close the inner peripheral surfaces of the first member 21 and the second member 23. This acts as a brazing material for joining the member 25.) Thereby, the brazing materials 23c and 25b for joining the inner peripheral surfaces of the first member 21 and the second member 23 and the closing member 25 at the time of brazing. 25c does not flow out to the tube 5 from the inner peripheral surface side and the outer peripheral surface side of the first member 21.

  (I) By joining (ii) and (iii), the brazing material 23c for joining the first member 21 and the second member 23 and the first member 21 and the second member 23 and the closing member 25 are joined at the time of brazing. Therefore, the brazing materials 25b, 25c, and 23c are not lost to the tube 5.

"effect"
The effects of the first reference example will be summarized below.

First, according to the first reference example , as described above, the brazing material layer 5c of the tube 5 and the brazing of the header tanks 7 and 9 are formed by the inner peripheral surface and the end of the first member 21 that does not include the brazing material layer. The material layers (the brazing material layer 23c of the second member 23 and the brazing material layers 25b and 25c of the closing member 25) are divided. Therefore, the brazing material of the header tank 7 is not taken away on the heat exchanger core portion 1A side where the capillary portion is extremely large, and the brazing material of the header tank 7 is not insufficient. As a result, the connection stability between components (connectors 15, 17 and the like) joined to the header tank and members (first member 21, second member 23, closing member 25) constituting the header tanks 7, 9 is good. Become. Moreover, since the brazing material of the header tanks 7 and 9 does not flow into the heat exchanger core 1A, excess brazing material does not accumulate in the tubes 5 and the outer fins 3 of the heat exchanger core 1A. As a result, the ventilation area between the tubes 5 and 5 is not reduced by the accumulation of the brazing material.

  Similarly to the closing member 25, the partition member 27 is also arranged in the pipe 19 made of the first member and the second member so that the brazing material layers 27b and 27c do not touch the outer peripheral surface of the first member 21. Therefore, the brazing material of the header tanks 7 and 9 does not flow out to the heat exchanger core portion 1A side through the brazing material layers 27b and 27c of the partition member 27. A structure without the partition member 27 is also included in the scope of the right of the present invention.

Secondly, according to the heat exchanger 1 of the first reference example , the tube 5 has a structure including the joint portions 47 and 47 along the longitudinal direction of the tube 5. The blocking action becomes more effective. This is because, if there is no brazing material flow blocking portion as in this embodiment, the brazing material in the header tanks 7 and 9 is further sucked by the joint portions 47 and 47 of the tube 5.

“Tube Modification 1”
Note that, for example, as in the modification of the tube of FIGS. 14A, 14B, and 14C, the tube of the first reference example is provided if there is a joint along the longitudinal direction of the tube even if the shape of the joint is different. The same effect can be obtained. Hereinafter, description of the structure of each modification is added.

  Each of FIGS. 14A, 14B, and 14C is a type in which a single metal thin plate that is a material is folded back as in the tube of FIG.

In the tube 50 of FIG. 14A, a long plate-like material provided with a brazing material layer 50c on the entire outer peripheral surface of the core material 50a is folded back along the longitudinal direction, and the joint portions 51 at both ends in the width direction. , 52 is the same as the tube 5 of the first reference example in that the two are joined by brazing, but one of the joints 51 and 52 at the both ends in the width direction of the material (upper side in this example) is connected to the other. The tube 5 of the first reference example is configured to be longer than the joint portion 52 (lower side in this example), and one of the joint portions 51 is folded back so as to wind the other joint portion 52 and is formed in a substantially U shape. And different. At the time of brazing, the inner surface of the joint portion 52 comes into contact with the outer surface having the brazing material layer of the joint portion 51, whereby the joint portions 51 and 52 are brazed and joined.

  In the tube 60 of FIG. 14B, a long plate-like material provided with a brazing material layer 60 c on the entire outer peripheral surface of the core material 60 a is folded back along the longitudinal direction, and the joint portions 61 at both ends in the width direction. , 61 is the same as the tube 5 in FIG. 5 in that the two are joined together by brazing, but the contact area between the joints 61 and 61 formed in advance inwardly at both ends in the width direction of the long plate-like material is as shown in FIG. The tube 5 is different.

  In the tube 70 of FIG. 14C, a long plate-like material having a brazing material layer on the entire outer peripheral surface is folded back along the longitudinal direction, and the joints 71 and 71 at both ends in the width direction are joined together. Although it is the same as that of the tube 5 of FIG. 5 by the point which carries out brazing, each joining part 71 and 71 differs from the tube 5 of FIG. 5 by the point which brazed and joined the inner surfaces which do not have a brazing material layer. In addition, like the tube 5 in FIG. 5, the tube 50 in FIG. 14 (a), and the tube 60 in FIG. 14 (b), a structure in which a brazing material layer is present in advance between the joints at the time of brazing is joined. Although considered to be excellent in stability, the brazing material layers 70c and 70c on the outer surfaces of the joint portions 71 and 71 are connected to the joint portions 71 and 71 through the terminals even in the structure shown in FIG. Since it goes around the inner surface, the joining portions 71 and 71 are joined together.

“Tube Variation 2”
FIG. 15 shows another modification of the tube. The tube 80 in FIG. 15 has a structure in which two thin metal plates 80A and 80B as materials are joined to each other at the joint portions 81 and 82 at both ends in the width direction of the thin metal plates 80A and 80B. 5 is the same as the tube of FIG. 5 in that there are joint portions 81 and 82 along the longitudinal direction of the tube 80. Therefore, the same effect as the tube 5 of FIG. 5 is acquired.

“Tube Modification 3”
In addition, the structure where a tube does not provide a junction part in a tube longitudinal direction is also included in this invention. As this example, there is a tube extruded toward the longitudinal direction of the tube.

Hereinafter, other embodiments and reference examples will be described. In the following description, the same or similar components are denoted by the same reference numerals, and description of the configuration and the operational effects is omitted.

"Second Reference Example "
7-9 is the header tank 140 of the heat exchanger of a 2nd reference example . In the header tank 140 of the second reference example , the contact structure of the brazing material layer of the header tank 140 is the same as that of the first reference example as shown in FIGS. 8 and 9, but the first member 141 of the header tank 140 The second member 142 is different from the first reference example in that a closing member is integrally formed with the second member 142. In other words, the header tank 140 according to the second reference example is a type including a box-shaped first member 141 and a second member 142 each having an opening in the combination direction.

According to the second reference example, since the contact structure of the first reference example and a similar brazing material layer, it is possible to obtain the same effects as the first embodiment.

“Third Reference Example ”
10 and 11 show the header tank 160 of the heat exchanger of the third reference example . The header tank 160 of the third reference example has the same structure as that of the first reference example or the second reference example except that a brazing material layer 23b is provided on the inner peripheral surface of the second member 23. As described above, even in the structure including the brazing material layer 23b on the inner peripheral surface of the second member 23, the same effects as those of the first reference example and the second reference example can be obtained.

"This implementation form"
Figure 12 shows the header tank 170 of heat exchanger of the present implementation mode. The header tank 170 of the present implementation embodiment this, the expanding portion 171, 171 which is expanded in a tapered cross section formed above the terminal portions of the pair of straight portions 31 and 31 of the first member 21 (141), first The terminal portion of the member 21 (141) is different from the first reference example and the second reference example in that it is separated from the brazing material layer on the outer peripheral surface of the second member.

According to this embodiment, in addition to the effects of the first reference example and the second reference example , even if the first member 21 (141) is made thin, the first member will be used when the brazing material melts during brazing. It is possible to reliably prevent the brazing material layer 21c on the outer circumferential surface of the first member 21 (141) and the brazing material layer 23c on the outer circumferential surface of the second member 23 from being connected through the terminal portion 21 (141). It is also effective when the first member 21 (141) is not thin.

“ Fourth Reference Example ”
FIG. 13 shows the header tank 180 of the heat exchanger of the fourth reference example . The header tank 180 of the fourth reference example is different from the first to third reference examples in that the second member 23 is composed only of a core material that does not include a brazing material layer. Before brazing, the brazing material X for joining the first member 21 (141) and the second member 23 is applied to the first member 21 (141) or the second member 23.

According to the fourth reference example , the same operational effects as those of the first to third reference examples can be obtained. In the first to third reference examples , since the first member 21 and the second member 23 are joined by the brazing material layer 23c of the second member 23, the first member 21 and the second member 23 are joined. Therefore, the manufacturing process of the heat exchanger 1 is simpler than that of the fourth reference example .

  Hereinafter, in order to clarify the scope of the right of the present invention, structures outside the scope of the present invention will be described as comparative examples. Note that Comparative Example 1 and Comparative Example 2 are not conventional examples.

"Comparative Example 1"
16 and 17 show a first comparative example with the present invention. This Comparative Example 1 is outside the scope of the present invention. The header tank 200 of the heat exchanger of Comparative Example 1 is different from the present invention ( this embodiment) in that a brazing material layer is provided on the inner peripheral surface of the first member 21.

  In the comparative example 1, as shown in FIGS. 16 and 17, the brazing material layer 23 c on the outer peripheral surface of the second member 23 for joining the first member 21 and the second member 23 is the inner periphery of the first member 21. It continues to the brazing material layer 5c on the outer peripheral surface of the tube 5 via the brazing material layer 21b on the surface. Therefore, the brazing material layer 23 c on the outer peripheral surface of the second member 23 for joining the first member 21 and the second member 23 is the brazing material layer 21 b on the inner peripheral surface of the first member 21 → the outer peripheral surface of the tube 5. In the path of the brazing material layer 5c, the material flows out into and out of the tube 5.

  On the other hand, in the present invention, since the brazing material layer is not provided on the inner circumferential surface of the first member that may come into contact with the brazing material layer on the outer circumferential surface of the tube, the brazing material of the header tank is prevented from flowing into the tube. Is done.

“Comparative Example 2”
18 and 19 show a second comparative example with the present invention. This Comparative Example 2 is outside the scope of the present invention. The header tank 300 of the heat exchanger of Comparative Example 2 is different from the present invention ( this embodiment) in the support structure of the closing member 25 and the partition member 27. Specifically, in Comparative Example 2, in addition to the structure of the present embodiment, the first member 21 is also provided with a support hole 91, and the protrusion 26c (28c) supported by the support hole 91 is further blocked. This is added to the member 25 (partition member 27).

  In Comparative Example 2, the brazing member 25 and the brazing member layers 25b, 25c, 27b, and 27c of the partitioning member 27 pass through the protrusions 26c and 28c of the blocking member 25 and the partitioning member 27. It contacts the material layer 21c. Therefore, as shown in FIGS. 18 and 19, the brazing material layer 23 c on the outer peripheral surface of the second member 23 for joining the first member 21 and the second member 23 is the brazing material layer of the closing member 25 and the partition member 27. 25b, 25c, 27b, 27c → the brazing material layer 21c on the outer circumferential surface of the first member 21 → the brazing material layer on the outer circumferential surface of the tube 5 will be lost to the tube 5. At the same time, the brazing material layers 25b, 25c, 27b, and 27c of the closing member 25 and the partitioning member 27 are also washed away toward the tube through the same path.

  On the other hand, in the present invention, when there is a blocking member and / or a partition member, the blocking member and / or the brazing material layer of the blocking member and / or the partition member are not contacted with the brazing material layer on the outer peripheral surface of the first member. Since the partition member is fitted in the header tank, the raw material of the header tank is prevented from flowing out into the tube. Further, in the present invention, when the closing member and / or the partition member is supported by the first member, the support portion may not have a hole shape penetrating from the inner peripheral surface of the first member to the outer peripheral surface. It may be a bottomed hole or groove formed on the peripheral surface.

FIG. 1 is a front view showing an overall configuration of a heat exchanger according to a first reference example of the present invention. FIG. 2 is an exploded perspective view around the header tank of the heat exchanger. FIG. 3 is a cross-sectional view of the heat exchanger header tank in a portion where the tube insertion port is located. FIG. 4 is a cross-sectional view of a portion of the header tank where a blocking member (or partition member) is located. FIG. 5 is a sectional view of the tube of the header tank. FIG. 6 is an explanatory view showing a part of the manufacturing process of the tube. 7A and 7B are perspective views showing a main part of a header tank of a heat exchanger according to a second reference example of the present invention. FIG. 7A shows a state before the header tank is assembled, and FIG. 7B shows a state after the assembly. FIG. 8 is a transverse cross-sectional view of a portion of the header tank of the heat exchanger of the second reference example where a tube insertion port is located. FIG. 9 is a cross-sectional view of the header tank of the heat exchanger of the second reference example in a portion where the closing member (or partition member) is located. FIG. 10 is a cross-sectional view of the header tank of the heat exchanger of the third reference example of the present invention at the portion where the tube insertion port is located. FIG. 11 is a cross-sectional view of a portion of the header tank of the heat exchanger of the third reference example where a blocking member (or partition member) is located. Figure 12 is a header tank of a heat exchanger of the present implementation embodiment, a cross-sectional view of a portion of the tube insertion port is located. FIG. 13 is a cross-sectional view of a portion of the header tank of the heat exchanger of the fourth reference example of the present invention where the tube insertion port is located. FIG. 147 is a diagram showing a modification of the tube. FIG. 15 is a view showing a modification of the tube. FIG. 16 is Comparative Example 1 for the present invention, and is a cross-sectional view of a portion where the tube insertion port of the header tank is located. FIG. 17 is a cross-sectional view of a portion where the closing member (or partition member) of the header tank is located in Comparative Example 1 for the present invention. FIG. 18 is Comparative Example 1 for the present invention, and is a cross-sectional view of a portion where the tube insertion port of the header tank is located. FIG. 19 is a cross-sectional view of a portion where the closing member (or partition member) of the header tank is located in Comparative Example 1 for the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger 1A ... Heat exchanger core part 3 ... Outer fin 5 ... Tube 5M ... Metal thin plate (tube material)
7, 9 ... Header tank 19 ... Pipe 19a ... Both ends of opening 21 ... First member 21a ... Core material 21b ... Brazing material layer 21c ... Brazing material layer 23 ... Second member 23a ... Core material 23b ... Raw material layer 23c ... Brazing material layer 25 ... Closing member 25a ... Core material 25b, 25c ... Brazing material layer 26a ... Protruding portion 26b, 26b ... Wing portion 26c ... Protruding portion 27 ... Partition member 27a ... Core material 27b, 27c ... Brazing material layer 28a ... Protrusion Part 28b, 28b ... Wing part 33 ... Tube insertion port 47, 47 ... Joint part 49 ... Inner fin 49a ... Core material 49b, 49c ... Raw material layer 50 ... Tube (modification)
50a ... Core material 50c ... Raw material layer 51 ... Joining part 52 ... Joining part 60 ... Tube (Modification)
60a ... Core material 60c ... Raw material layer 61 ... Junction 70 ... Tube (modification)
70c ... Raw material layer 71 ... Junction 80 ... Tube (modified example)
80A, 80B ... Metal sheet (tube material)
81, 81 ... Joining part 91 ... Support hole 140 ... Header tank (2nd Embodiment)
141 ... 1st member 142 ... 2nd member 160 ... Header tank (3rd Embodiment)
170 ... Header tank (fourth embodiment)
171 ... Expanding part (terminal of the first member)
180 ... Header tank (fifth embodiment)
X ... Raw material

Claims (7)

An outer fin (3), a plurality of tubes (5) (50) (60) (70) (80) stacked alternately with the outer fin (3), and the open ends of the tubes are inserted. Heat exchanger (1) comprising header tanks (7, 9) (140) (160) (170) (180) communicating with each tube (5) (50) (60) (70) (80) In
The header tanks (140), (160), (170), and (180) are composed of a box-shaped first member (141) and a box-shaped second member (142) having openings toward each other in the combination direction,
The second member (142) does not include a tube insertion opening (33) for inserting an end of the tube (5, 50, 60, 70, or 80), and the first member (141) is not provided with the tube insertion opening. (33)
The first member (141) does not include a brazing material layer over the entire inner peripheral surface and includes a brazing material layer (21c) over the entire outer peripheral surface,
The brazing material (23c) for joining the first member (141) and the second member (142) is not in contact with the brazing material layer (21c) on the outer peripheral surface of the first member (141). Both members (141, 142) are joined by brazing in a state where the second member (142) is fitted to the inner peripheral surface of the first member (141), and the header tank (170) is The terminal (171) of the one member (21) (141) is spaced apart from the outer peripheral surface of the second member (23) (142), and an expanded portion that is expanded in a tapered shape at the front end portion is provided. A heat exchanger (1) characterized by A heat exchanger (1) according to claim 1,
The brazing material (23c) for joining the first member (141) and the second member (142) is the brazing material layer (23c) of the second member (23). Heat exchanger (1). An outer fin (3), a plurality of tubes (5) (50) (60) (70) (80) stacked alternately with the outer fin (3), and the open ends of the tubes are inserted. Heat exchanger (1) comprising header tanks (7, 9) (140) (160) (170) (180) communicating with each tube (5) (50) (60) (70) (80) In
The header tank (7, 9) includes a pipe (19) composed of a first member (21) and a second member (23) to be combined with each other, and a closing member (25) that closes both ends of the pipe (19). 25), and
The second member (23) does not have a tube insertion port (33) for inserting the end of the tube (5) (50) (60) (70) (80), and the first member (21) A tube insertion opening (33);
The first member (21) does not include a brazing material layer over the entire inner peripheral surface and includes a brazing material layer (21c) over the entire outer peripheral surface.
A brazing material (23c or X) for joining the first member (21) and the second member (23) and a brazing material for joining the pipe (19) and the closing member (25, 25). The second member (23) is disposed on the inner peripheral surface of the first member (21) so that the material (25b, 25c) does not contact the brazing material layer (21c) on the outer peripheral surface of the first member (21). In the state where the closing member (25, 25) is fitted in the inner peripheral surface of the pipe (19) composed of the first member (21) and the second member (23). The terminal (171) of the first member (21) (141) of the header tank (170) is separated from the outer peripheral surface of the second member (23) (142) , characterized in that a flared portion which is flared tapered section above the terminal portion Exchanger (1). A heat exchanger (1) according to claim 3,
The brazing material (23c) (X) for joining the inner peripheral surface of the first member (21) and the second member (23) is the brazing material layer (23c) of the second member (23). A heat exchanger (1) characterized by being. A heat exchanger (1) according to claim 3 or claim 4, wherein
The closing member (25) is plate-shaped and includes a brazing material layer (25b, 25c) on at least one surface thereof. The heat exchanger (1) according to any one of claims 1 to 5,
In the header tanks (7, 9) (140) (160) (170) (180), the internal space of the header tanks (7, 9) (140) (160) (170) (180) is the longitudinal direction. A partition member (27) that is divided into a plurality of rooms in the direction is mounted,
The brazing material for joining the inner peripheral surface of the pipe (19) and the partition member (27) does not come into contact with the brazing material layer (21c) on the outer peripheral surface of the first member (21). Each member is brazed and joined in a state where the partition member (27) is fitted into the inner peripheral surface of the pipe (19) composed of one member (21) and the second member (23). A heat exchanger (1) characterized by A heat exchanger (1) according to claim 6,
The partition member (27) is plate-shaped and includes a brazing material layer (27b, 27c) on at least one surface thereof.

Images