JP2008032358A - Heat exchanger and manufacturing method of heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the projection distance of a connecting pipe in the direction of thickness of a heat exchanger, and to avoid a fully occupying space from being increased even when a fluid is introduced from a plurality of passages where the fluid is circulated into the heat exchanger or the fluid is delivered from the heat exchanger to the plurality of passages. <P>SOLUTION: A fuel cooler 1 includes a cooler core part in which heat exchange is made between cooling water and fuel, and a connector body 3. The connector body 3 is provided with a second opening 40 to which a first fuel introduction pipe 10 is connected and a second opening part 41 to which a second fuel introduction pipe 11 is connected. The second opening parts 40, 41 are provided between the peripheral edges of a first plate and a second plate, and opened toward the outer periphery. The connector body 3 is constructed by joining the first plate and the second plate to each other in the opposite state, and the connector body 3 is provided with a fuel inlet passage Fin communicating a fuel inflow port 32 with the second opening parts 40, 41. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchanger and a method for manufacturing the heat exchanger.

  Conventionally, as an example of a heat exchanger, an oil cooler that cools oil by causing cooling water and oil to flow into and out of a cooler core through a connection pipe has been proposed (see Patent Document 1). The oil cooler described in Patent Document 1 has a bracket portion provided with an oil inflow hole, an oil outflow hole, a cooling water inflow hole, and a cooling water outflow hole in the cooler core portion. Then, connecting pipes are directly connected to the oil inflow hole, the oil outflow hole, the cooling water inflow hole, and the cooling water outflow hole that communicate with the cooler core part, and an external device (for example, an engine) and the cooler core part are connected via the connection pipe. Is in communication.

Moreover, in an example of the heat exchanger of patent document 2, a recessed part is each provided in a pair of piping joint plate, a pair of piping joint plate is joined so that a recessed part may oppose, and a heat exchanger and A communication passage that communicates with the inlet / outlet pipe is formed. Then, the opening of the communication passage to which the inlet / outlet pipe is connected is directed in a direction crossing the direction in which the tank side connection opening faces.
JP 2004-346916 A Japanese Utility Model Publication No. 4-63985

  In the oil cooler described in Patent Document 1, since the bending radius of the connection pipe is limited, when the connection pipe is bent and extended to the external device, the connection pipe protrudes in the thickness direction of the oil cooler. It was difficult to reduce the protruding distance of the connecting pipe in the thickness direction. Therefore, for example, when an oil cooler is mounted in a vehicle, a sufficient space must be provided in the vehicle so that a structural component (for example, a fuel pump) disposed in the vehicle does not come into contact with the connection pipe. In other words, it was disadvantageous from the viewpoint of downsizing the oil cooler.

  Further, in the heat exchanger described in Patent Document 2, since the inlet / outlet pipe is connected to the opening facing in the direction intersecting the direction in which the tank side connection opening faces, the protruding distance of the inlet / outlet pipe from the tank portion is reduced. However, the communication passages formed in the pair of pipe joint plates only communicate one tank side connection opening and one opening to which the inlet / outlet pipe is connected. Therefore, for example, when introducing a fluid from a plurality of connection pipes to a heat exchanger or when deriving a fluid from a heat exchanger to a plurality of connection pipes, the plurality of connection pipes are combined into one. It is necessary to provide a joint member for diversion and a joint member for diversion for dividing one pipe into a plurality of connection pipes. That is, the heat exchanger described in Patent Document 2 is used when introducing a fluid from a plurality of connection pipes through which the fluid is circulated to the heat exchanger or when deriving a fluid from the heat exchanger to the plurality of pipes. There is a problem that the space inside the vehicle is occupied by the provision of the joint member for merging and the joint member for divergence.

  The present invention has been made in view of such circumstances, and an object of the present invention is to reduce the protruding distance of the connection pipe in the thickness direction of the heat exchanger and to heat exchanger from a plurality of connection pipes through which fluid flows. It is an object of the present invention to provide a heat exchanger that avoids an increase in occupied space even when a fluid is introduced into a pipe or when a fluid is led out from a heat exchanger to a plurality of connection pipes.

  According to the first aspect of the present invention, there is provided a heat exchanger main body in which heat exchange between the refrigerant and the fluid is performed, a first opening communicating with the heat exchanger main body, and a second opening opening outward. A heat exchanger provided with a provided joined body, wherein the joined body is configured by joining a pair of plates in an opposing state, the plurality of second openings are provided, and the plurality of second openings are provided. The gist of the invention is that a communication passage is provided between the pair of plates, and is provided between peripheral edges of the pair of plates, and communicates the first opening and the plurality of second openings.

  According to this configuration, since the second opening is opened in a direction intersecting with the direction in which the first opening is opened, when the connection pipe is connected to the second opening, the thickness direction of the heat exchanger The projecting distance of the connecting pipe at can be reduced.

  In addition, since connection pipes communicating with a plurality of external devices can be individually connected to the second opening, a joint member for merging a plurality of connection pipes into one connection pipe, or one connection pipe Since there is no need to provide a diversion joint member that divides into a plurality of connection pipes, the occupied space can be reduced.

  According to a second aspect of the present invention, in the first aspect of the invention, the heat exchanger main body has an outer edge portion protruding toward the joined body side, and the outer edge portion is joined to the joined body. It is a summary.

According to this structure, compared with the case where only the 1st opening part is joined with the heat exchanger main body, the joint stability of a conjugate | zygote and a heat exchanger main body can be made more reliable.
The invention according to claim 3 is used as a fuel cooler for cooling the fuel used in the internal combustion engine in the invention according to claim 1 or 2, and the communication passage is used for the fuel as the fluid. The gist is that it is a passage.

According to this configuration, it is possible to prevent vapor lock in the fuel supply system of the internal combustion engine by cooling the fuel supplied to the internal combustion engine.
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the heat exchanger body is formed by stacking a plurality of core plates, and an internal space between adjacent core plates. A plurality of inner spaces, one of the adjacent inner spaces is a refrigerant inner space through which a refrigerant flows, and the other is an inner space for fluid through which a fluid flows, and the pair The gist is that the plates are superposed in the stacking direction of the core plates.

According to this configuration, even when the stacking direction of the core plates is the thickness direction of the heat exchanger body, the protruding distance of the connection pipe in the thickness direction can be reduced.
The invention according to claim 5 is for a refrigerant in which a plurality of core plates are stacked to form an inner space between adjacent core plates, and there are a plurality of the inner spaces, and one of the adjacent inner spaces flows through the refrigerant. A heat exchanger manufacturing method comprising: a heat exchanger main body configured to be an internal space and the other to be a fluid internal space through which a fluid flows; and a joined body including a pair of plates, The brazing material is applied to the joint portion between the core plates, the joint portion between the pair of plates, and the joint portion between the joined body and the heat exchanger body, and the plurality of plates are laminated and laminated. In addition, in a state where the stack of the plurality of plates and the pair of plates are stacked in the stacking direction of the stack, the pair of plates and the entire stack are heated and then cooled and brazed. The gist To.

  According to this structure, the process of joining the some laminated | stacked plates and the process of couple | bonding a heat exchanger main body and a conjugate | zygote can be performed simultaneously.

  According to the present invention, the projecting distance of the connection pipe in the thickness direction of the heat exchanger is shortened, and the fluid is introduced into the heat exchanger from the plurality of connection pipes through which the fluid circulates. Even when the fluid is led out to the connection pipe, it is possible to avoid an increase in the occupied space.

Hereinafter, embodiments embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a fuel cooler 1 as a heat exchanger used for cooling a fuel includes a cooler core portion 2 as a heat exchanger body and a joined body 3 coupled to the cooler core portion 2. ing. The fuel cooler 1 is a water-cooled stacked cooler that uses cooling water as a refrigerant. A bracket 4 that fixes the fuel cooler 1 to the inside of the vehicle is attached to the fuel cooler 1. One surface of the bracket 4 serves as a mounting seat for the internal structure portion of the vehicle, and the other surface is joined to the cooler core portion 2 by welding.

  As shown in FIG. 2, the cooler core portion 2 is formed by laminating a number of aluminum alloy core plates 20 which are metal materials. The core plate 20 constituting the cooler core portion 2 is press-molded in a dish shape and has an outer edge portion 20a that expands in a tapered shape. The outer edge portion 20a protrudes toward the joined body 3 side. And the junction part between core plates 20, ie, the part where the outer edge part 20a of the core plate 20 overlaps, is in a watertight state by brazing. A part of the outer edge portion 20 a of the first core plate 20 counted from the joined body 3 side is joined to the joined body 3. Between the first core plate 20 and the second core plate 20 counted from the joined body 3 side, the fuel is surrounded by the first core plate 20 and the second core plate 20. An internal space is formed. An internal space for fuel is also formed between the third core plate 20 and the fourth core plate 20 and between the fifth core plate 20 and the sixth core plate 20. . Each internal space for fuel communicates with each other via a fuel communication passage 21.

  The second core plate 20 and the third core plate 20 counted from the joined body 3 side are surrounded by the second core plate 20 and the third core plate 20. An internal space for cooling water is formed. Further, an internal space for cooling water is also formed between the fourth core plate 20 and the fifth core plate 20. Each of the cooling water inner spaces communicates with each other via the cooling water communication passage 22.

  As shown in FIG. 3, the joined body 3 includes a first plate 30 that joins the cooler core portion 2 and a second plate 31 that faces the first plate 30, and the first plate 30 and the second plate. 31 is joined. In FIG. 3, in order to illustrate the fuel inflow recess 31 a formed in the second plate 31, the second plate 31 is directed in a direction opposite to the direction facing when the first plate 30 is joined. It is shown in a state. Both the first plate 30 and the second plate 31 are made of an aluminum alloy.

  The fuel inflow recess 30 a formed in the first plate 30 is formed so as to extend from the fuel inflow port 32 to the peripheral edge 33 of the first plate 30. The fuel inflow recess 31a formed in the second plate 31 is formed in the same passage shape as the fuel inflow recess 30a. The fuel inflow recess 30a formed in the first plate 30 and the fuel inflow recess 31a formed in the second plate 31 form a fuel inlet passage Fin. That is, the fuel inlet passage Fin is a space formed by being surrounded by the fuel inflow recess 30a and the fuel inflow recess 31a. The fuel inlet passage Fin has a shape in which the first branch passage Fin1 and the second branch passage Fin2 join the main passage Fin3.

  As shown in FIG. 3, the first plate 30 is provided with a fuel inlet portion 32 as a first opening, and the fuel inlet portion 32 protrudes toward the cooler core portion 2. The fuel inflow port portion 32 is formed in a cylindrical shape and opens toward the cooler core portion 2 in the thickness direction of the fuel cooler 1. The fuel inlet 32 is located at a position corresponding to the fuel communication path 21 provided in the first core plate 20, and is inserted and connected to the fuel communication path 21 provided in the first core plate 20. Has been. The “thickness direction of the fuel cooler 1” is a direction in which a plurality of core plates 20 are stacked.

  As shown in FIG. 4, the first and second tributary passages Fin <b> 1 and Fin <b> 2 of the fuel inlet passage Fin are the outer peripheral edge of the joined body 3 (the peripheral edge 33 of the first plate 30 and the peripheral edge 34 of the second plate 31 shown in FIG. 3. The main flow path Fin3 communicates with the fuel inflow port portion 32. These openings (hereinafter referred to as second openings 40 and 41) and the fuel inflow portion 32 are communicated with each other by a fuel inlet passage Fin. The second openings 40 and 41 open toward the outer periphery of the fuel cooler 1. The “peripheral direction of the fuel cooler 1” is a direction orthogonal to the thickness direction of the fuel cooler 1 (stacking direction of the core plate 20).

  A fuel outlet passage Fout is formed in the joined body 3. The fuel outlet passage Fout is a space surrounded by the fuel outflow recess 30b formed in the first plate 30 and the fuel outflow recess 31b formed in the second plate 31. The fuel outlet passage Fout communicates a fuel outlet part 35 formed in the first plate 30 and a fuel outlet part 42 that opens toward the outer periphery of the cooler core part 2. The fuel outlet part 35 is connected to the fuel communication path 21 provided in the first core plate 20.

  A cooling water inlet passage Win is formed in the joined body 3. The cooling water inlet passage Win is a space surrounded by the cooling water inflow recess 30 c formed in the first plate 30 and the cooling water inflow recess 31 c formed in the second plate 31. The cooling water inlet passage Win communicates the cooling water inlet portion 36 formed in the first plate 30 with the cooling water inflow opening 43. The cooling water inlet port 36 is connected to the cooling water communication path 22 provided in the second core plate 20.

  A cooling water outlet passage Wout is formed in the joined body 3. The cooling water outlet passage Wout communicates the cooling water outlet 37 formed in the first plate and the cooling water outflow opening 44. The cooling water outlet passage Wout is a space surrounded by the cooling water outflow recess 30 d formed in the first plate 30 and the cooling water outflow recess 31 d formed in the second plate 31. The cooling water outlet 37 is connected to the cooling water communication path 22 provided in the second core plate 20.

  The fuel outflow recess 30b, the cooling water inflow recess 30c, and the cooling water outflow recess 30d are formed so as to extend from the fuel outlet 35, the cooling water inlet 36, and the cooling water outlet 37 to the peripheral edge 33 of the first plate 30, respectively. Has been. The fuel outflow recess 30b, the cooling water inflow recess 30c, and the cooling water outflow recess 30d are formed in the same passage shape as the fuel outflow recess 31b, the cooling water inflow recess 31c, and the cooling water outflow recess 31d.

  As shown in FIGS. 1 and 3, the first fuel introduction pipe 10 and the second fuel introduction pipe 11 as connection pipes are connected to the cooler core portion 2 via the joined body 3. One end 10 a of the first fuel introduction pipe 10 and one end 11 a of the second fuel introduction pipe 11 do not extend in the thickness direction of the fuel cooler 1, but begin to extend in the outer peripheral direction of the fuel cooler 1. One end 10a of the first fuel introduction pipe 10 and one end 11a of the second fuel introduction pipe 11 are connected to the second openings 40 and 41, respectively. The other end 10b of the first fuel introduction pipe 10 is connected to an upstream return pipe (not shown) extending from one bank of the V-type engine. The other end 11b of the second fuel introduction pipe 11 is connected to an upstream return pipe (not shown) extending from the other bank of the V-type engine. The return pipe is a pipe that returns the fuel that has not been injected by the fuel injection valve to the fuel tank (not shown). The first fuel introduction pipe 10 and the second fuel introduction pipe 11 are curved so as to avoid a device disposed inside the vehicle.

  The fuel outlet opening 42, the cooling water inlet opening 43, and the cooling water outlet opening 44 include one end 12 a of the fuel outlet pipe 12, one end 13 a of the cooling water inlet pipe 13, and the cooling water outlet pipe 14. One end 14a is connected to each other. The other end 12b of the fuel outlet pipe 12 is connected to a downstream return pipe (not shown) that returns the fuel to the fuel tank. The other end 13b of the coolant introduction pipe 13 is connected to a pipe (not shown) extending from the radiator. The other end 14b of the cooling water outlet pipe 14 is connected to a pipe (not shown) that communicates with a water jacket (not shown).

Next, a method for manufacturing the fuel cooler 1 will be described.
First, six aluminum alloy core plates 20 are produced by press molding. Thereafter, the brazing material is applied to the joint portion between the core plates 20, that is, the outer edge portion 20 a of the core plate 20, and the brazing material is also applied to the joint portion of the fuel communication path 21 and the cooling water communication path 22.

  In addition, a brazing material is applied to the fuel inlet portion 32, the fuel outlet portion 35, the cooling water inlet portion 36, and the cooling water outlet portion 37 provided in the first plate 30, and the outer edge portion 23 of the cooler core portion 2 (see FIG. A brazing material is applied to the portion of the first plate 30 corresponding to the outer edge portion 20a) of the first core plate 20 shown in FIGS. Further, the brazing material is also applied to the portion of the first plate 30 that contacts the second plate 31 and the portion of the second plate 31 that contacts the first plate 30.

  In this way, the process of applying the brazing material to the joint portion between the plurality of core plates 20, the joint portion between the first plate 30 and the second plate 31, and the joint portion between the joined body 3 and the first core plate 20 is performed. After performing, it mounts so that the several core plate 20 may be laminated | stacked. The fuel inlet portion 32 and the fuel outlet portion 35 coated with the brazing material are inserted into the fuel communication passage 21, and the cooling water inlet portion 36 and the cooling water outlet portion 37 coated with the brazing material are inserted into the cooling water communication passage 22. The first plate 30 is placed on the cooler core portion 2 in a state where the first plate 30 is inserted into the cooler core portion 2. At this time, a part of the outer edge portion 23 of the cooler core portion 2 is in contact with the first plate 30. Thereafter, the first fuel introduction pipe 10 and the second fuel introduction pipe 11 are respectively placed on the portions of the fuel inflow recess 30a and the fuel outflow recess 30b corresponding to the second openings 40 and 41, and the fuel outlet pipe 12, The cooling water introduction pipe 13 and the cooling water outlet pipe 14 are respectively connected to the fuel outflow opening 42, the cooling water inflow opening 43, the cooling water outflow opening 30 corresponding to the cooling water outflow opening 30b, the cooling water inflow depression 30c, It mounts in the site | part of the cooling water outflow recessed part 30d. Then, the second plate 31 is placed on the first plate 30 so as to face each other. At this time, the first plate 30 and the second plate 31 are overlapped in the stacking direction of the core plate 20. One end 10a of the first fuel introduction pipe 10, one end 11a of the second fuel introduction pipe 11, one end 12a of the fuel outlet pipe 12, one end 13a of the cooling water inlet pipe 13, and one end 14a of the cooling water outlet pipe 14 are respectively It is sandwiched between the first plate 30 and the second plate 31. In this state, the fuel cooler 1 is placed in a heating furnace, and the whole of the cooler core portion 2 and the entire joined body 3 are heated in the heating furnace to melt the applied brazing material. Take out and cool by brazing. When brazing is performed, the joined body 3 and the cooler core portion 2 are joined. Further, at this time, the watertight fixation of the stacked core plates 20, the watertight fixation of the fuel communication passage 21 and the cooling water communication passage 22, and the watertight fixation of the cooler core portion 2 and the joined body 3 are simultaneously performed.

Next, the operation of the fuel cooler 1 configured as described above will be described.
The fuel cooler 1 is mounted on a vehicle on which a V-type engine is mounted. As shown in FIG. 4, the fuel not used in one bank of the V-type engine flows into the first fuel introduction pipe 10 through the return pipe extending from one bank and is not used in the other bank. Flows into the second fuel introduction pipe 11 through a return pipe extending from the other bank. The fuel that has passed through the first fuel introduction pipe 10 and the second fuel introduction pipe 11 passes through the second openings 40 and 41 formed at the outer edge of the joined body 3 and flows into the fuel inlet passage Fin. The fuel that has passed through the second opening 40 passes through the first branch passage Fin1, the fuel that has passed through the second opening 41 passes through the second branch passage Fin2, and then passes through the first and second branch passages Fin1 and Fin2. The fuel that has passed joins in the main flow path Fin3. The fuel merged in the main flow path Fin3 reaches the fuel inlet 32. The fuel flows through the fuel inner space of the cooler core portion 2 after passing through the fuel inlet portion 32. At this time, the fuel is cooled by exchanging heat with the cooling water flowing in the cooling water inner space. The cooled fuel flows into the fuel outlet passage Fout through the fuel communication passage 21. The fuel that has passed through the fuel outlet passage Fout passes through the fuel outlet pipe 12 and is then guided to a downstream return pipe (not shown) and returned to the fuel tank.

In this embodiment, the following effects can be obtained.
(1) Since the one end 10a of the first fuel introduction pipe 10 and the one end 11a of the second fuel introduction pipe 11 do not protrude in the thickness direction of the cooler core section 2, the first fuel in the thickness direction of the cooler core section 2 The protruding distance of the introduction pipe 10 and the second fuel introduction pipe 11 can be reduced. The “projection distance of the first fuel introduction pipe 10 and the second fuel introduction pipe 11” means the first fuel introduction pipe 10 and the second fuel introduction pipe 11 from the surface of the cooler core portion 2 to which the joined body 3 is attached. It means the distance in the thickness direction. Further, both the first fuel introduction pipe 10 connected to the return pipe extending from one bank and the second fuel introduction pipe 11 connected to the return pipe extending from the other bank are respectively connected to the second openings 40 and 41. Can be connected directly. Therefore, since it is not necessary to provide a joint member for merging, the space occupied by the fuel cooler 1 can be reduced.

  (2) The cooler core portion 2 has an outer edge portion 23 protruding toward the joined body 3, and the outer edge portion 23 is joined to the joined body 3. Therefore, compared with the case where the fuel inlet portion 32 and the fuel outlet portion 35 are joined to the fuel communication passage 21 and the cooling water inlet portion 36 and the cooling water outlet portion 37 are only joined to the cooling water passage 22, The coupling stability between the joined body 3 and the cooler core portion 2 can be further ensured.

  (3) The fuel cooler 1 as a heat exchanger is used to cool the fuel supplied to the V-type engine. Therefore, by cooling the fuel, it is possible to prevent the so-called vapor lock, in which fuel vapor is accumulated in the piping through which the fuel supplied to the V-type engine flows and the fuel pump does not supply the fuel.

  (4) The joined body 3 includes a fuel outlet passage Fout, a cooling water inlet passage Win, and a cooling water outlet passage Wout. The fuel outlet passage Fout, the cooling water inlet passage Win, and the cooling water outlet passage Wout communicate with each other. The fuel outflow opening 42, the cooling water inflow opening 43, and the cooling water outflow opening 44 are open toward the outer peripheral direction of the cooler core portion 2. Therefore, when communicating the cooler core part 2 with the fuel lead-out pipe 12, the cooling water introduction pipe 13, and the cooling water lead-out pipe 14 via the joined body 3, the fuel lead-out pipe 12, the cooling water introduction pipe 13, It is possible to avoid the cooling water outlet pipe 14 from protruding in the thickness direction.

  (5) The cooler core portion 2 is formed by stacking a plurality of core plates 20 so that a plurality of inner spaces are formed between the adjacent core plates 20, and the fuel cooler 1 circulates cooling water in the stacking direction. It is a stacked type cooler in which the cooling water inner space and the fuel inner space through which the fuel flows are alternately formed so as to be adjacent to each other. The first plate 30 and the second plate 31 are overlapped in the stacking direction of the core plate 20. Therefore, since brazing can be performed in a state where the first plate 30 and the second plate 31 are placed on the plurality of stacked core plates 20, the step of joining the first plate 30 and the second plate 31, The process of joining 3 and the cooler core part 2 can be performed by the same process, and manufacture of the cooler core part 2 is easy.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The passage of the fuel inlet passage Fin may be branched into three or more. For example, in addition to the first tributary passage Fin1 and the second tributary passage Fin2, the fuel tributary fin is changed to a shape in which the third tributary also joins the main flow passage Fin3. You may comprise so that one 2nd opening part may connect.

  A passage other than the fuel inlet passage Fin may be branched. For example, in the case where the fuel cooler 1 is disposed in the path until the fuel delivered from the fuel tank is supplied to the V-type engine, the fuel outlet path Fout is divided into two. Good. With this configuration, even if the fuel cooler 1 is disposed in the path until the fuel sent out from the fuel tank is supplied to the V-type engine, the fuel cooled by the fuel cooler 1 is supplied to the V-type engine. Can be supplied to both banks of type engines.

  The direction in which the second openings 40 and 41 are opened is not limited to the outer peripheral direction of the cooler core 2. If the first fuel introduction pipe 10 and the second fuel introduction pipe 11 as connection pipes do not extremely protrude in the thickness direction of the cooler core portion 2, the second openings 40 and 41 are in the outer peripheral direction of the cooler core portion 2. May be opened in a tilted direction. Similarly, the direction in which the fuel outflow opening 42, the cooling water inflow opening 43, and the cooling water outflow opening 44 open is not limited to the outer peripheral direction of the cooler core portion 2. If the fuel lead-out pipe 12, the cooling water introduction pipe 13, and the cooling water lead-out pipe 14 as connection pipes do not extremely protrude in the thickness direction of the cooler core portion 2, the fuel outflow opening 42 and the cooling water inflow opening 43 are provided. The cooling water outflow opening 44 may be opened in a direction inclined with respect to the outer peripheral direction of the cooler core portion 2.

  The joined body 3 may not be joined to the outer edge portion 23 of the cooler core portion 2. If the joined body 3 is securely joined and fixed to the cooler core portion 2 at the fuel inlet portion 32, the fuel outlet portion 35, the cooling water inlet portion 36, and the cooling water outlet portion 37, The outer edge portion 23 does not need to be joined to the joined body 3. For example, you may attach the conjugate | zygote 3 to the cooler core part 2 on the opposite side to the side in which the outer edge part 23 of the cooler core part 2 exists. In this case, the outer surface of the joined body 3 on the cooler core portion 2 side is flattened without protruding the fuel inlet portion 32, the fuel outlet portion 35, the cooling water inlet portion 36, and the cooling water outlet portion 37. The outer surface of the assembly 3 and the cooler core portion 2 with the fuel inlet portion 32, the fuel outlet portion 35, the cooling water inlet portion 36, and the cooling water outlet portion 37 facing the fuel communication path 21 and the cooling water communication path 22. When the joined body 3 and the cooler core part 2 are joined together, the fuel inlet part 32, the fuel outlet part 35, the cooling water inlet part 36, the cooling water outlet part 37 and the cooler core part 2 are made to communicate with each other. be able to.

  ○ A pair of plates that form a communication passage, a fuel passage plate that forms a fuel inlet passage Fin and a fuel outlet passage Fout, a cooling water passage plate that forms a cooling water inlet passage Win, and a cooling water outlet passage Wout The cooling water passage plate may be provided separately. In this case, for example, as shown in FIG. 5, a first fuel passage plate 50 and a second fuel passage plate 51 are provided as a pair of plates forming the fuel inlet passage Fin and the fuel outlet passage Fout. The first cooling water plate 52 and the second cooling water plate 53 are provided as a pair of plates that form the cooling water inlet passage Win, and the first cooling is provided as a pair of plates that form the cooling water outlet passage Wout. A water plate 54 and a second cooling water plate 55 are provided.

(Circle) the fuel cooler 1 as a heat exchanger is not limited to a lamination type cooler.
O The refrigerant used for the fuel cooler 1 may be changed. For example, the fuel cooler 1 may be an air-cooled cooler by changing the refrigerant to air.

O It is not limited to the heat exchanger as the fuel cooler 1 that cools the fuel. For example, the heat exchanger of the present invention may be used as an oil cooler that cools engine oil.
If it is applied to the joining portion between the first plate 30 and the second plate 31 and the joining portion between the joined body 3 and the first core plate 20, it is brazed to the first plate 30 and the second plate 31. The range of the portion where the material is applied is not particularly limited. For example, you may apply | coat so that the whole 1st plate 30 and the 2nd plate 31 may be coated with a brazing material.

  O The material constituting the core plate 20 may be changed from an aluminum alloy to another material. For example, the core plate 20 may be changed to ceramic. Moreover, you may change the material which comprises the 1st plate 30 and the 2nd plate 31 from an aluminum alloy to another material. For example, the first plate 30 and the second plate 31 may be changed to ceramic.

The following technical idea can be understood from the embodiment.
A fluid inlet passage for guiding fluid to the heat exchanger body, a fluid outlet passage for guiding fluid from the heat exchanger body to the connection pipe, and a refrigerant inlet for guiding refrigerant to the heat exchanger body A passage and a refrigerant outlet passage that guides the refrigerant from the heat exchanger main body to the connection pipe, and at least one of the fluid inlet passage, the fluid outlet passage, the refrigerant inlet passage, and the refrigerant outlet passage. The heat exchanger according to claim 1, wherein one is configured as the communication passage.

The perspective view of the fuel cooler in this embodiment. AA line side sectional view of a cooler core part. The disassembled perspective view of the fuel cooler in this embodiment. The front view of the fuel cooler in this embodiment. The disassembled perspective view of the fuel cooler in another embodiment.

Explanation of symbols

  Fin ... fuel inlet passage as a communication passage, Fin1 ... first branch passage, Fin2 ... second branch passage, Fin3 ... main flow passage, Fout ... fuel outlet passage, Win ... cooling water inlet passage, Wout ... cooling water outlet passage, DESCRIPTION OF SYMBOLS 1 ... Fuel cooler, 2 ... Cooler core part, 3 ... Assembly, 10 ... 1st fuel introduction pipe as a connection pipe, 11 ... 2nd fuel introduction pipe as a connection pipe, 12 ... Fuel outlet pipe, 13 ... Cooling water introduction Reference numeral 14: Cooling water outlet pipe, 20: Core plate, 20a: Outer edge part, 23: Outer edge part, 30 ... First plate, 31 ... Second plate, 32 ... Fuel inlet part as first opening part, 33 , 34 ... peripheral edge, 40, 41 ... second opening.

Claims (5)

Heat exchange comprising a heat exchanger body in which heat is exchanged between the refrigerant and the fluid, and a joined body having a first opening communicating with the heat exchanger body and a second opening opened to the outside. A vessel,
The joined body is configured by joining a pair of plates in an opposing state, the plurality of second openings are provided, and the plurality of second openings are provided between the peripheral edges of the pair of plates, A heat exchanger in which a communication passage that communicates the first opening and the plurality of second openings is provided between the pair of plates. The heat exchanger according to claim 1, wherein the heat exchanger main body has an outer edge portion protruding toward the joined body side, and the outer edge portion is joined to the joined body. 3. The heat exchanger according to claim 1, wherein the heat exchanger is used as a fuel cooler for cooling fuel used in an internal combustion engine, and the communication passage is a passage of the fuel as the fluid. The heat exchanger main body is configured to stack a plurality of core plates to form an inner space between adjacent core plates, and there are a plurality of the inner spaces, and one of the adjacent inner spaces has a refrigerant flowing therethrough. The other space is a fluid inner space through which a fluid flows, and the pair of plates are overlapped in the stacking direction of the core plates. The heat exchanger as described in. A plurality of core plates are stacked to form an inner space between adjacent core plates, and there are a plurality of the inner spaces, and one of the adjacent inner spaces is a refrigerant inner space through which a refrigerant flows, The other is a method of manufacturing a heat exchanger comprising a heat exchanger body that is a fluid inner space through which a fluid circulates, and a joined body composed of a pair of plates,
Applying a brazing material to a joint portion between the plurality of core plates, a joint portion between the pair of plates, and a joint portion between the joined body and the heat exchanger body, and laminating the plurality of plates, In a state where the stack of the plurality of stacked plates and the pair of plates are stacked in the stacking direction of the stack, the pair of plates and the entire stack are heated and then cooled and brazed. A method of manufacturing a heat exchanger.

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