JP2008281270A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of confirming presence of a partitioning plate when assembling and temporarily fixing components, and preventing displacement in the longitudinal direction of a header tank of the partitioning plate. <P>SOLUTION: The header tank 2 of this heat exchanger is composed of a tank main body 7 having a hollow portion extending in the longitudinal direction of the header tank 2 and opened at its both ends, and pipe connection plates 8. The partitioning plate 11 is disposed on a prescribed position of the hollow portion of the tank main body 7. A partitioning plate insertion hole 27 for inserting the partitioning plate 11 from an outer side, is formed on the tank main body 7, and the partitioning plate 11 is inserted into the partitioning plate insertion hole 27 in a state of exposing its outer edge portion to an outer side of the tank main body 7. A means for suppressing movement in the longitudinal direction of the header tank 2, of the partitioning plate 11 is disposed on an inner peripheral face of the hollow portion of the tank main body 7. Engagement claws 21 engaged with an outer side edge portion of the partitioning plate 11 and an outer face of the tank main body 7, are formed on the pipe connection plates 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a heat exchanger, and more particularly to a heat exchanger suitably used as a gas cooler of a supercritical refrigeration cycle in which a supercritical refrigerant such as CO ₂ is used.

  In this specification and claims, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIG. 1) is the front, and the opposite side is the rear. Further, in this specification and claims, differently from the front-rear direction inner side, the front-rear direction outer side, the left-right direction inner side, the left-right direction outer side, etc. It shall be based on the direction. For example, the left side of FIGS. 3 to 6 is referred to as “inside”, and the right side is also referred to as “outside”.

  Furthermore, in this specification, the “supercritical refrigeration cycle” means a refrigeration cycle in which the refrigerant enters a supercritical state exceeding the critical pressure on the high pressure side, and the “supercritical refrigerant” It shall mean the refrigerant used in the refrigeration cycle. further,

  As a heat exchanger used in a gas cooler of a supercritical refrigeration cycle having a compressor, a gas cooler, an evaporator, a decompressor, and an intermediate heat exchanger that exchanges heat between the refrigerant that has come out of the gas cooler and the refrigerant that has come out of the evaporator, Each header includes a pair of header tanks arranged at a distance from each other, and a plurality of heat exchange pipes arranged in parallel between both header tanks and having both ends connected to both header tanks. The tank is composed of a tank main body and a pipe connecting plate that covers a surface of the tank main body facing the heat exchange pipe side and is joined to the tank main body. One header portion is provided, and the tank body is formed of one cylindrical body having both ends opened and has a hollow portion having both ends opened. In addition, at least one header part is formed in each header tank by disposing a partition plate that closes the hollow part at at least both ends of the hollow part, and a plurality of pipes are provided in a part corresponding to the header part in the pipe connection plate. The insertion hole is formed in a penetrating manner with an interval in the length direction of the pipe connection plate, and the end of the heat exchange pipe is inserted into the pipe insertion hole and brazed to the pipe connection plate. A communication hole is formed to connect the pipe insertion hole of the pipe connection plate into the hollow portion of the tank body, and a partition plate insertion hole is formed in the tank body to insert the partition plate from the inside (heat exchange pipe side). Is inserted from the inside into the partition plate insertion hole so that the inner edge thereof is exposed to the inside of the tank body, and the tank body and the pipe are in contact with the inner peripheral surface of the tank body. Play for connection Those assigned Jiro is known (see Patent Document 1).

By the way, manufacture of the heat exchanger of patent document 1 is performed by assembling each component and temporarily fixing, and then brazing each component collectively, but after assembling and temporarily fixing each component, the tank is manufactured. Since the presence or absence of the partition plate in the main body cannot be confirmed, there is a problem that a defective product is generated as a heat exchanger when forgetting to arrange the partition plate when assembling each part. Further, when brazing, the portion of the partition plate that contacts the inner peripheral surface of the hollow portion of the tank body may be displaced in the length direction of the header tank, resulting in brazing failure and refrigerant leakage. There is.
Special table 2002-543368

  The object of the present invention is to solve the above problems and to confirm the presence or absence of the partition plate when the parts are assembled and temporarily fixed, and to prevent the displacement of the partition plate in the length direction of the header tank. It is to provide a heat exchanger that can be used.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A pair of header tanks spaced apart from each other and a plurality of heat exchange pipes arranged in parallel between both header tanks and having both ends connected to both header tanks, Each header tank is composed of a tank main body and a pipe connecting plate that covers the surface of the tank main body facing the heat exchange pipe side and is joined to the tank main body. In addition, at least one header portion is provided, the tank body has a hollow portion extending in the length direction of the header tank and open at both ends, and a partition plate for closing the hollow portion is disposed at at least both ends of the tank body. As a result, at least one header portion is formed in each header tank, and a plurality of tube insertion holes are formed in the portion corresponding to the header portion in the tube connection plate. The end of the heat exchange tube is inserted into the tube insertion hole and brazed to the tube connection plate, and the tube connection plate is inserted into the tank body. In the heat exchanger in which a communication hole that allows the hole to communicate with the hollow portion of the tank body is formed,
A partition plate insertion hole for inserting the partition plate from the outside is formed in the tank body, and the partition plate is inserted from the outside into the partition plate insertion hole so that the outer edge of the partition plate is exposed to the outside of the tank body. Are provided on the inner peripheral surface of the hollow portion of the tank body to prevent the partition plate from moving in the length direction of the header tank. A heat exchanger in which engagement claws are provided to engage both front and rear end portions of the outer edge portion and front and rear side edge portions of the outer surface of the tank body, and the engagement claws are brazed to the partition plate and the tank body.

  2) A partition plate insertion hole is formed in the tank body in a penetrating manner, and both front and rear end portions of the partition plate insertion hole are located inward of the front and rear side edges of the tank body, and both front and rear side edges of the partition plate insertion hole Is straight, the surface facing the tank body of the pipe connection plate is a flat surface, the front and rear side edges and the inner side edge of the partition plate are straight, and the front and rear side edges of the partition plate are It is joined to the front and rear edges of the partition plate insertion hole of the tank body, the inner edge of the partition plate is joined to the surface of the pipe connection plate facing the tank body side, and the inner end opening of the partition plate insertion hole is It is closed by the pipe connection plate, and both sides of the header tank in the length direction of the partition plate are joined to both sides of the header tank in the length direction of the header plate of the partition plate insertion hole. By the part facing the hollow part The above-mentioned heat exchanger 1), wherein the blocking means for preventing movement of the longitudinal direction of the header tanks of the partition plate is formed.

  3) The above 1) or 2) where the outer surfaces of the front and rear side edges of the tank body are flat surfaces, and the outer edges of the front and rear ends of the partition plate are flush with the outer surfaces of the front and rear side edges of the tank body. 2) The heat exchanger described.

  4) The tank body is interposed between the first plate and the pipe connection plate, the first plate having an outward bulge extending in the longitudinal direction at the center in the front-rear direction and opening at both ends. And a second plate brazed to both plates, and the second plate of the tank body has a through hole that allows the tube insertion hole of the pipe connection plate to pass into the outward bulge of the first plate. The partition plate insertion hole is formed so as to straddle the first plate and the second plate, the portion excluding the front and rear ends at the outer edge of the partition plate, and the outward bulging portion of the first plate The heat exchanger according to any one of 1) to 3), wherein the outer surface is flush with the outer surface.

  5) The above description 4), wherein side pipe covering walls that cover both front and rear side faces of the tank body are formed at both front and rear side edges of the pipe connection plate, and engagement claws are provided at the front ends of both side face covering walls, respectively. Heat exchanger.

  6) The tank body consists of one cylindrical body with both ends open, and the inside is a hollow part with both ends open, and the partition plate insertion hole is formed on the peripheral wall of the tank body from inside to outside. The partition plate is joined only to the tank main body, and is located in the hollow portion of the tank main body in the partition plate at a position corresponding to the partition plate insertion hole in the inner peripheral surface of the tank main body. The concave groove and the portion facing the hollow portion of the tank body in the partition plate insertion hole are formed with blocking means for preventing the partition plate from moving in the length direction of the header tank. The heat exchanger as described in 1) above.

  7) The tank body consists of one cylindrical body with both ends open, the partition plate insertion hole is arc-shaped when viewed from the length direction of the header tank, and the concave groove is formed on the inner peripheral surface of the tank body. The tank body in the partition plate is formed so as to be continuous with the insertion hole, the groove is arcuate when viewed from the length direction of the header tank, and the inner edge of the partition plate is arcuate with the same curvature as the bottom surface of the groove. The outer edge exposed to the outside of the tank has an arc shape with the same curvature as the outer peripheral surface of the tank body, and the step between the inner edge and the outer edge having different curvatures in the partition plate is formed on the peripheral wall of the tank body. The heat exchanger according to 6) above, which is engaged with both ends of the partition plate insertion hole.

  8) A partition plate is connected to the outer side of the circular main body having the same radius as the radius of curvature of the bottom surface of the concave groove formed on the inner peripheral surface of the tank main body, and is exposed to the outside of the tank main body. The outer edge portion is composed of a partial annular portion having an arc shape with the same curvature as the outer peripheral surface of the partition plate insertion hole tank body, and the stepped portion is between the main body portion and both end portions of the partial annular portion. Formed, the inner peripheral edge of the main body is bonded to both side surfaces and the bottom surface of the groove formed on the inner peripheral surface of the tank main body, and the stepped portion is bonded to both ends of the partition plate insertion hole in the peripheral wall of the tank main body. The heat exchanger as described in 7) above, wherein both the lengthwise sides of the header tank in the partial annular portion are joined to both lengthwise sides of the header tank of the partition plate insertion hole in the tank body.

  9) The above 1) to 8), wherein at least one of the header tanks has a plurality of header portions, and the partition plate is disposed between both end portions of the header tank and adjacent header portions. ).

  According to the heat exchanger of 1) above, a partition plate insertion hole for inserting a partition plate from the outside is formed in the tank body, and the partition plate is partitioned so that its outer edge is exposed to the outside of the tank body. Inserted into the plate insertion hole from the outside and joined to the header tank, a blocking means is provided on the inner peripheral surface of the hollow portion of the tank body to prevent the partition plate from moving in the length direction of the header tank. Engaging claws that engage both the front and rear ends of the outer edge of the partition plate and the front and rear side edges of the outer surface of the tank body are provided on both front and rear edges of the plate. Because it is brazed, it is possible to check the presence or absence of the partition plate in the tank body even after the parts are assembled and temporarily fixed, so that it is possible to prevent defective products from being generated as heat exchangers. it can. Further, since the blocking means prevents the partition plate from moving in the length direction of the header tank, it is possible to prevent the partition plate from being displaced in the length direction of the header tank and causing poor brazing. . Furthermore, since the partition plate is pressed by the engaging claw and the inner edge thereof is pressed against the tank body, the partition plate and the tank body are reliably joined by brazing.

  According to the heat exchanger of the above 2), since the joining portions of the partition plate and the tank main body are all linear, they are reliably joined without causing poor joining. Moreover, the blocking means for blocking the movement of the partition plate in the length direction of the header tank can be formed relatively easily.

  According to the heat exchanger of 3) above, the partition plate can be effectively pressed by the engaging claws.

  According to the heat exchanger of 4) above, the tank body can be made relatively easily. Further, when manufacturing the heat exchanger, the pipe connection plate, the first plate, and the second plate are laminated so that the second plate comes to the intermediate portion, and the partition plate is inserted into the partition plate insertion hole. The pipe connecting plate and the first plate are engaged with each other by engaging the engaging claws of the pipe connecting plate with the front and rear ends of the outer edge of the partition plate and the front and rear side edges of the outer surface of the tank body. The second plate can be temporarily fixed, and the partition plate can be temporarily fixed. Therefore, a dedicated jig for temporary fixing becomes unnecessary, and the manufacturing cost is reduced.

  According to the heat exchanger of 6), the number of parts is reduced. Moreover, the blocking means for blocking the movement of the partition plate in the length direction of the header tank can be formed relatively easily.

  According to the heat exchangers of the above 7) and 8), the tank body and the partition plate can be firmly joined, and the leakage of the refrigerant from the joint part of both can be reliably prevented.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the heat exchanger according to the present invention is applied to a gas cooler of a supercritical refrigeration cycle.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. In the following description, the top and bottom and the left and right in FIGS.

  1 and 2 show the overall configuration of a gas cooler to which a heat exchanger according to the present invention is applied, FIGS. 3 to 7 show the configuration of the main parts, and FIGS. 8 to 10 show a part of the method for manufacturing the gas cooler. A process is shown.

1 and 2, a gas cooler (1) of a supercritical refrigeration cycle that uses a supercritical refrigerant, for example, CO ₂ , is arranged with two header tanks (2) (2) that are spaced apart in the left-right direction and extend in the up-down direction. 3) and a plurality of flat heat exchange tubes (4) arranged in parallel with a space in the vertical direction between the header tanks (2) and (3), and adjacent heat exchange tubes (4) Between the upper and lower ends of the heat exchange pipe (4) and the corrugated fins (5) brazed to the heat exchange pipe (4) and the upper and lower ends of the corrugated fins (5) And an aluminum side plate (6) brazed to the corrugated fin (5). In this embodiment, the right header tank (2) is referred to as a first header tank, and the left header tank (3) is referred to as a second header tank.

  The first header tank (2) is formed of an aluminum tank body (7) and a brazing sheet having a brazing filler metal layer on both sides, here an aluminum brazing sheet, and covers the left side surface of the tank body (7). And a pipe connection plate (8) brazed to the tank body (7).

  The tank body (7) is formed of a brazing sheet having a brazing filler metal layer on both sides, here an aluminum brazing sheet, and disposed on the right side (outside) and a metal plate, here aluminum. Consists of a second plate (7B) made of bare material and interposed between the first plate (7A) and the pipe connection plate (8) and brazed to both plates (7A) (8) Has been. The tank body (7) has a hollow portion (9) extending in the vertical direction and open at both ends, and the hollow portion (9) is formed at the upper and lower end portions and the central portion in the vertical direction of the tank body (7). A partition plate (11) for closing is disposed. Then, the upper and lower end openings of the hollow portion (9) are closed by the partition plate (11), and the hollow portion (9) is formed by the partition plate (11) at the upper and lower portions (9A) (9B ), The inlet header portion (10A) and the outlet header portion (10B) are provided vertically. The refrigerant flows in the length direction in the upper and lower portions (9A) and (9B) of the hollow portion (9) of the tank body.

  As shown in FIG. 2 to FIG. 7, an outward expansion that is open at both ends of the first plate (7 </ b> A) of the first header tank (2) in the longitudinal direction of the first plate (7 </ b> A) in the longitudinal direction. A protruding portion (7a) is formed, and flat portions (7b) are provided continuously to both front and rear side edges of the outwardly bulging portion (7a). A hollow portion (9) of the tank body (7) is formed inside the outward bulge portion (7a). The opening facing the left side of the outward bulge portion (7a) of the first plate (7A) is closed by the second plate (7B). Through holes (25) extending in the front-rear direction and extending from one flat portion (7b) to the other flat portion (7b) are formed at both the upper and lower end portions and the vertical center portion of the first plate (7A). Yes.

  A refrigerant inlet (12) is formed at a position slightly below the through hole (25) at the upper end of the top of the outward bulge (7a) of the first plate (7A), and the outward bulge ( 7a) A rectangular parallelepiped inlet member (13) made of metal having a refrigerant inflow passage (14) leading to the refrigerant inlet (12) on the outer surface, here made of aluminum bare material, is used as a brazing material on the outer surface of the first plate (7A). It is brazed using. In addition, a refrigerant outlet (15) is formed at a position slightly above the through hole (25) at the lower end portion at the top of the outer bulging portion (7a), and on the outer surface of the outer bulging portion (7a), A rectangular parallelepiped outlet member (16) made of metal having a refrigerant outlet channel (17) leading to the refrigerant outlet (15), here made of aluminum bare material, is brazed using the brazing material on the outer surface of the first plate (7A). Has been. The first plate (7A) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides.

  The inlet member (13) and the outlet member (16) are respectively formed with screw holes (35) and (36) extending forward from the rear surface. In the supercritical refrigeration cycle, the screw hole (35) of the inlet member (13) is used to screw the joint member attached to the tip of the pipe extending from the compressor, and the screw hole of the outlet member (16). (36) is used for screwing the joint member attached to the tip of the pipe extending from the intermediate heat exchanger.

  The second plate (7B) of the tank body (7) of the first header tank (2) is entirely flat, and the first plate (7A) has a through hole (25) at the upper and lower ends and the vertical center. ), The through holes (26) that are each long in the front-rear direction and have the same width and length as the through holes (25) are formed. The through hole (25) of the first plate (7A) and the through hole (26) of the second plate (7B) are provided with a penetrating partition plate insertion hole (27) in the tank body (7). It is formed so as to straddle the plates (7A) and (7B). The front and rear ends of the partition plate insertion hole (27) are located inward of the front and rear side edges of the tank body (7), and the front and rear side edges of the partition plate insertion hole (27) are in the left and right direction. It is a straight line that stretches.

  The surface of the pipe connection plate (8) of the first header tank (2) facing the tank body (7) is a flat surface. In the pipe connecting plate (8), a plurality of penetrating pipe insertion holes (18) elongated in the front-rear direction are formed at intervals in the vertical direction. The plurality of tube insertion holes (18) in the upper half are formed in the vertical range of the upper portion (9A) of the hollow portion (9) of the tank body (7), and are also inserted in the plurality of tubes in the lower half. The hole (18) is formed in the vertical range of the lower portion (9B) of the hollow portion (9) of the tank body (7). The length in the front-rear direction of the tube insertion hole (18) is slightly longer than the width in the front-rear direction of the outer bulge portion (7a), and both front and rear ends of the tube insertion hole (18) are outward bulge portions. It protrudes outward from both front and rear edges of (7a). In addition, the pipe connecting plate (8) protrudes to the right and left side edges, and the tip extends to the outer surface of the first plate (7A), and the first plate (7A) and the second plate of the tank body (7). Side surface covering walls (19) that cover both front and rear side surfaces of the two plates (7B) are integrally formed and brazed to both front and rear side surfaces of the first plate (7A) and the second plate (7B). Projecting inward in the front-rear direction and corresponding to the partition plate insertion holes (27) in the tank body (7) at both the upper and lower ends and the center in the vertical direction of the projecting end of each side covering wall (19) and the first Engaging claws (21) that engage with the outer surface of the plate (7A) and cover both front and rear ends of the partition plate insertion hole (27) are integrally formed and brazed to the first plate (7A). The pipe connection plate (8) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides.

  The partition plate (11) is formed of an aluminum brazing sheet having a brazing material layer on both sides, and is inserted into each partition plate insertion hole (27) from the outside. The partition plate (11) is a horizontal rectangular first portion (11a) fitted into each partition plate insertion hole (27) when viewed from the outside in the left-right direction, and an outer edge of the first portion (11a). It consists of a bow-shaped second portion (11b) that is formed integrally with the portion excluding the upper and lower ends and protrudes outward (see FIG. 4). The front and rear side edges and the inner edge of the first portion (11a) of the partition plate (11) are linear. In addition, the corners between the front and rear side edges and the inner edge are cut obliquely in order to improve workability during insertion into the partition plate insertion hole (27). The outer edge portions of the first portion (11a) on both the front and rear sides of the second portion (11b) are flush with the outer surface of the flat portion (7b) of the first plate (7A) of the tank body (7). The outer edge of the second portion (11b) is flush with the outer surface of the outward bulge (7a) of the first plate (7A). The front and rear side edges of the first part (11a) of the partition plate (11) are brazed to the front and rear side edges of the partition plate insertion hole (27) in the tank body (7), and the inner edge is also connected to the pipe. It is brazed to the outer side surface of the plate for the horizontal direction. In addition, the upper and lower sides of the partition plate (11) (both sides in the length direction of the header tank) are on the upper and lower side surfaces (both sides in the length direction of the header tank) of the partition plate insertion hole (27) in the tank body (7). It is brazed. Further, the engagement claw (21) of the pipe connection plate (8) is formed at a position corresponding to the partition plate insertion hole (27) so as to cover both front and rear ends of the partition plate insertion hole (27). Thus, the engaging claw (21) is also engaged with the outer edge of the first portion (11a) of the partition plate (11) and brazed to the partition plate (11).

  Here, the partition plate (11) is formed on the inner peripheral surface of the hollow portion (9) of the tank body (7) by the portion facing the hollow portion (9) of the tank body (7) in the partition plate insertion hole (27). Blocking means for blocking the movement in the vertical direction (the length direction of the header tank) is formed.

  In the portion between the upper and lower through holes (26) and the central through hole (26) in the second plate (7B) of the tank body (7), the pipe insertion holes ( A through-hole communication hole (22) is formed through which 18) communicates with the upper and lower side portions (9A) and (9B) of the hollow portion (9) of the tank body (7). Each communication hole (22) is formed at a position corresponding to each pipe insertion hole (18) of the pipe connection plate (8), and the communication hole (22) is slightly larger than the pipe insertion hole (18). It has become. And all the communicating holes (22) leading to the upper part (9A) of the hollow part (9) of the tank body (7) in the second plate (7B) are adjacent communicating holes in the second plate (7B) ( 22) The communication part (23) communicated by the communication part (23) formed by cutting the front-rear direction center part of the part between, and the communication part (22) communicating with all the communication holes (22) leading to the upper part (9A) ( 23) and a center portion of the communication hole (22) in the front-rear direction (a portion corresponding to the communication portion (23) in the communication hole (22)), the refrigerant circulation portion in which the refrigerant flows in the vertical direction on the second plate (7B) (28) is formed. In addition, all the communication holes (22) leading to the lower part (9B) of the hollow part (9) of the tank body (7) in the second plate (7B) are adjacent communication holes in the second plate (7B), respectively. (22) Communicating with the communicating part (23) formed by cutting the central part in the front-rear direction of the part between the two parts, and communicating with all the communicating holes (22) leading to the lower part (9B) Refrigerant flowing in the up and down direction on the second plate (7B) by the center portion (23) and the central portion in the front-rear direction of the communication hole (22) (the portion corresponding to the communication portion (23) in the communication hole (22)) A distribution part (29) is formed.

  And it corresponds to the upper part (9A) and the lower part (9B) of the two plates (7A) (7B) and the pipe connection plate (8) constituting the tank body (7) of the first header tank (2). The inlet header part (10A) and the outlet header part (10B) are formed by the parts to be formed, and the upper and lower side parts (9A) (9B) of the hollow part (9) of the tank body (7) and the second plate ( The refrigerant circulation portions of the inlet header portion (10A) and the outlet header portion (10B) are formed by both the refrigerant circulation portions (28) and (29) of 7B).

  As shown in FIG. 2, the second header tank (3) has substantially the same configuration as the first header tank (2), and the same components and the same parts are denoted by the same reference numerals. Both header tanks (2) and (3) are arranged so that the pipe connection plates (8) face each other.

  The tank body (7) of the second header tank (3) is provided with partition plates (11) only at the upper and lower ends, and the hollow portion (9) of the tank body (7) is partitioned only at the upper and lower ends. Closed by a plate (11). Thereby, the hollow part (9) of the tank body (7) is not partitioned vertically. As a result, one intermediate header portion (20) is formed in the second header tank (3) so as to straddle the inlet header portion (10A) and the outlet header portion (10B) of the first header tank (2). Yes. In addition, the refrigerant inlet and the refrigerant outlet are not formed in the outward bulge portion (7a) of the first plate (7A).

  All the pipe insertion holes (18) of the pipe connection plate (8) of the second header tank (3) are formed within the vertical direction of the hollow part (9) of the tank body (7). All the pipe insertion holes (18) of the connecting plate (8) are connected to the hollow part (9) of the tank body (7) through all the communication holes (22) of the second plate (7B). It has been. All the communication holes (22) of the second plate (7B) are formed by cutting the central part in the front-rear direction of the portion between the adjacent communication holes (22) in the second plate (7B) (23 ). As a result, the refrigerant is moved up and down on the second plate (7B) by the communication part (23) and the central part in the front-rear direction of the communication hole (22) (the part corresponding to the communication part (23) in the communication hole (22)). A refrigerant circulation part (30) flowing in the direction (second refrigerant circulation part of the second plate) is formed.

  The first header is formed by a portion corresponding to the hollow portion (9) in the two plates (7A) (7B) and the pipe connection plate (8) constituting the tank body (7) of the second header tank (3). The number of the headers (10A) (10B) of the first header tank (2) is one less than the two headers (10A) (10B) of the tank (2). ), And the refrigerant circulation part of the intermediate header part (20) is formed by the hollow part (9) of the tank body (7) and the refrigerant circulation part (30) of the second plate (7B). Is formed.

  The heat exchange pipe (4) is made of an extruded shape made of metal, here aluminum, and has a flat shape that is wide in the front-rear direction, and a plurality of refrigerant passages (4a) extending in the length direction are formed in parallel in the inside. ing. Both ends of the heat exchange pipe (4) are inserted into the pipe insertion holes (18) of the header tanks (2) and (3), respectively, using the brazing material layer of the pipe connection plate (8). It is brazed to the pipe connection plate (8). Note that both ends of the heat exchange pipe (4) enter the communication hole (22) up to the middle part in the thickness direction of the second plate (7B), and the refrigerant circulation part (28) ( 29) It faces within (30). All the heat exchange pipes (4) have a right end portion that leads to a refrigerant circulation portion of the inlet header portion (10A) of the first header tank (2) and a left end portion that is an intermediate header portion (20 of the second header tank (3)). ) Of the refrigerant circulation part of the first heat exchange pipe (4) leading to the upper half of the refrigerant circulation part and the right end of the refrigerant circulation part of the outlet header part (10B) of the first header tank (2). In addition, the left end is divided into a heat exchange pipe group consisting of a plurality of heat exchange pipes (4) communicating with the lower half of the refrigerant circulation part of the intermediate header part (20) of the second header tank (3). It is divided into the first and second paths (P1) and (P2), and the flow direction of the refrigerant in all the heat exchange pipes (4) constituting each path (P1) and (P2) is the same. In addition, the flow direction of the refrigerant in the heat exchange pipe (4) of the two paths (P1) and (P2) is different.

  The corrugated fin (5) is formed in a wavy shape using a brazing sheet having a brazing filler metal layer on both sides, here an aluminum brazing sheet.

  Hereinafter, the manufacturing method of a gas cooler (1) is demonstrated with reference to FIGS.

  First, by subjecting an aluminum brazing sheet having a brazing filler metal layer to pressing on both sides, a tank body (7) having an outward bulging portion (7a) and a flat portion (7b) and having a through hole (25) The first plate (7A) is formed. A refrigerant inlet (12) and a refrigerant outlet (15) are formed in the first plate (7A) of the first header tank (2). Moreover, the 2nd plate (7B) of the tank main body (7) which has a communicating hole (22), a communicating part (23), and a through-hole (26) is formed by pressing an aluminum bear material. Furthermore, by pressing the aluminum brazing sheet having the brazing filler metal layer on both sides, the plate engaging claws are connected straight to the pipe insertion hole (18), the side covering wall (19), and the side covering wall (19). A pipe connecting plate (8) having a forming protrusion (21A) is formed.

  Next, the three plates (7A), (7B) and (8) are stacked so that the second plate (7B) is in the middle, and the through holes (25) ( The partition plate (11) is inserted from the outside into the partition plate insertion hole (27) formed by 26) (see FIG. 10). Next, the engaging claw forming protrusion (21A) of the pipe connecting plate (8) is bent inward to form the engaging claw (21) and the engaging claw (21) is formed on the outer surface of the first plate (7A). The three plates (7A), (7B), and (8) are temporarily fixed and the partition plate (11) is temporarily fixed by engaging the front and rear side edges of the plate and the outer edges of both front and rear ends of the partition plate (11). Thus, temporary fixing bodies for the first and second header tanks (2) and (3) are produced. Further, the inlet member (13) and the outlet member (16) are temporarily fixed to the temporary fixing body by appropriate means.

  Next, the two temporary fixing bodies are arranged at intervals so that the pipe connecting plates (8) face each other, and a plurality of heat exchange pipes (4) and corrugated fins (5) are arranged alternately. Insert the both ends of the heat exchange pipe (4) into the pipe insertion hole (18) of the pipe connection plate (8) and the communication hole (22) of the intermediate plate (9), respectively. An assembly of all parts is obtained by arranging the side plate (6) outside the corrugated fin (5) and fixing it with an appropriate jig. .

  Thereafter, the assembly is heated to a predetermined brazing temperature, and the three plates (7A), (7B) (using the brazing material layer of the first plate (7A) and the brazing material layer of the pipe connection plate (8)). 8) are brazed to each other, and using the brazing material layer of the partition plate (11), the brazing material layer of the first plate (7A) and the brazing material layer of the pipe connection plate (8), 11) Front and rear side edges and tank body (7) partition plate insertion hole (27) front and rear side edges, partition plate (11) inner edge and pipe connection plate (8) tank body (7) Facing side, upper and lower surfaces of partition plate (11), upper and lower surfaces of partition plate insertion hole (27) in tank body (7), side covering wall (19), first plate (7A) and second plate Brazing the front and rear side faces of (7B), the engaging claws (21), the first plate (7A) and the partition plate (11), respectively, and using the brazing material layer of the first plate (7A) First plate (7A) and inlet member (13) The first header tank (2) is formed by brazing the outlet member (16). At the same time, the three plates (7A) (7B) (8) are brazed to each other using the brazing material layer of the first plate (7A) and the brazing material layer of the pipe connection plate (8). Using the brazing material layer of the partition plate (11), the brazing material layer of the first plate (7A) and the brazing material layer of the pipe connection plate (8), both front and rear edges of the partition plate (11) and the tank body Front and rear side edges of partition plate insertion hole (27) of (7), inner edge of partition plate (11) and surface of tank for pipe connection facing tank body (7) side, top and bottom of partition plate (11) Both sides, upper and lower sides of partition plate insertion hole (27) in tank body (7), side covering wall (19), front and rear sides of first plate (7A) and second plate (7B), plate engaging claws ( 21) and the first plate (7A) are brazed to form the second header tank (3). At the same time, let the pipe connection plate (8) and the heat exchange pipe (4), the heat exchange pipe (4) and the corrugated fin (5), and the corrugated fin (5) and the side plate (6) at the same time. Attached. Thus, the gas cooler (1) is manufactured.

  The gas cooler (1) constitutes a supercritical refrigeration cycle together with an intermediate heat exchanger that exchanges heat between the refrigerant that has come out of the compressor and the evaporator, the decompressor and the gas cooler and the refrigerant that has come out of the evaporator. For example, it is installed in a car.

In the gas cooler (1) described above, the CO ₂ that has passed through the compressor passes through the refrigerant inflow passage (14) of the inlet member (13) from the refrigerant inlet (12) to the inlet header portion (1) of the first header tank (2). 10A) and diverting while flowing downward through the upper part (9A) of the hollow part (9) of the tank body (7) and the refrigerant circulation part (28) of the second plate (7B), the first path (P1 ) Flows into the refrigerant passages (4a) of all the heat exchange tubes (4). The CO ₂ flowing into the refrigerant passage (4a) flows leftward in the refrigerant passage (4a) and flows into the upper half (inflow portion) of the intermediate header portion (20) of the second header tank (3). To do. The CO ₂ flowing into the upper half of the intermediate header part (20) flows downward through the hollow part (9) of the tank body (7) and the refrigerant circulation part (30) of the second plate (7B). The first header tank is divided and flows into the refrigerant passages (4a) of all the heat exchange pipes (4) of the second path (P2), changes the flow direction and flows rightward in the refrigerant passages (4a). Enter the exit header section (10B) of (2). Thereafter, CO ₂ flows downward through the lower part (9B) of the hollow part (9) of the tank body (7) and the refrigerant circulation part (29) of the second plate (7B), and enters the refrigerant outlet (15) and outlet. It flows out through the refrigerant outflow path (17) of the member (16). Then, while CO ₂ flows in the refrigerant passage (4a) of the heat exchange pipe (4), the ventilation gap is heat-exchanged with the air flowing in the direction indicated by the arrow X in FIG.

  In the above embodiment, the number of header portions (10A) (10B) of the first header tank (2) in the gas cooler (1) to which the heat exchanger according to the present invention is applied is 2, and the second header tank (3 The number of header sections (20) of 1) is 1 and the number of paths (P1) (P2) is 2, but the number of header sections of the first header tank (2) is not limited to this. Is 3 or more, the number of header sections of the second header tank (3) is one less than the number of header sections of the first header tank (2), and the number of passes is the header of the first header tank (2). It may be the same as the number of parts. In the heat exchanger according to the present invention, the first header tank is provided with a plurality of header portions arranged in the length direction, and the second header tank has the same number of header portions as the header portions of the first header tank. Provided side by side in the length direction, a refrigerant inlet is provided at a header portion at one end in the length direction of the first header tank, and at a header portion at the end opposite to the refrigerant inlet in the second header tank. A refrigerant outlet is provided, and all heat exchange tubes are composed of a plurality of heat exchange tubes arranged continuously in the length direction of the header tanks, and are divided into a number of paths one more than the number of headers of both header tanks. It may be applied to the existing gas cooler.

  In the above embodiment, the tank body (7) is formed by the first and second plates (7A) and (7B). However, a plurality of the second plates (7B) may be used. Good.

In the above embodiment, CO ₂ is used as the supercritical refrigerant in the supercritical refrigeration cycle. However, the present invention is not limited to this, and ethylene, ethane, nitric oxide, and the like can be used.

  Further, in the above embodiment, the heat exchange pipe (4) is made of an extruded aluminum material, but from a bent body obtained by bending a metal plate for tube production made of an aluminum brazing sheet having a brazing filler metal layer on both sides thereof. It may be.

  Furthermore, in the said embodiment, although the heat exchanger by this invention is applied to the gas cooler of a supercritical refrigeration cycle, the heat exchanger by this invention may be applied to the evaporator of a supercritical refrigeration cycle.

  11 to 13 show modifications of the header tank.

  11 and 12, a header tank (40) is formed of an aluminum tank body (41) and a brazing sheet having a brazing filler metal layer on both sides, here an aluminum brazing sheet, and the heat of the tank body (41). And a pipe connection plate (42) brazed to the tank body (41) so as to cover the surface facing the exchange pipe (4).

  The tank body (41) is composed of a brazing sheet having a brazing filler metal layer on both sides, here a cylindrical body formed by bending an aluminum brazing sheet into a cylindrical shape, and the inside of the tank body (41) has both ends in the length direction of the header tank. Is a hollow part (43) opened. The tank body (41) may be formed of an aluminum extruded profile. When the header tank (40) is used as a first header tank having an inlet header portion and an outlet header portion in the gas cooler (1) shown in FIGS. 1 and 2, the upper and lower portions of the hollow portion (43) of the tank body (41) Both end openings are closed by the partition plate (44), and the hollow portion (43) is partitioned into upper and lower portions by the partition plate (44) at the center in the length direction. A refrigerant inlet is formed in a portion between the upper partition plate (41) and the central partition plate (41) on the peripheral wall of the tank body (41), and the lower partition plate (41) and the central portion A rectangular parallelepiped inlet made of metal, in this case made of aluminum bear material, has a refrigerant outlet formed in a portion between the partition plate (41) and a refrigerant inflow passage leading to the refrigerant inlet on the outer peripheral wall of the tank body (40). The member and a rectangular parallelepiped outlet member made of a metal, in this case, made of an aluminum bear material, having a refrigerant outflow passage leading to the refrigerant outlet are brazed. When the header tank (40) is used as a second header tank having an intermediate header portion in the gas cooler (1) shown in FIGS. 1 and 2, the upper and lower ends of the hollow portion (43) of the tank body (41) are opened. Is closed by the partition plate (44).

  A partition plate insertion hole (45) for inserting the partition plate (44) from the outside is formed in the outer half of the peripheral wall of the tank body (41) from the outside to the inner and outer intermediate portions. The partition plate insertion hole (45) has a semicircular shape (arc shape) when viewed from the length direction of the header tank (see FIGS. 11 and 13). The length of the header tank (40) is continuous with the partition plate insertion hole (45) at a position corresponding to the partition plate insertion hole (45) on the inner peripheral surface of the inner half of the peripheral wall of the tank body (41). A concave groove (46) having a semicircular shape (arc shape) as viewed from the direction is formed.

  The partition plate (44) is formed of an aluminum brazing sheet having a brazing filler metal layer on both sides, and is inserted into each partition plate insertion hole (45) from the outside. The partition plate (44) includes a circular main body portion (44a) having the same radius as the curvature radius of the bottom surface of the concave groove (46) formed in the inner peripheral surface of the tank main body (41), and the main body portion (44a). The outer peripheral edge that is connected to the outside and exposed to the outside of the tank main body (41) is a partial annular portion (44b) that has an arc shape with the same curvature as the outer peripheral surface of the tank main body (41). The stepped portion (44c) between the main body portion (44a) of the partition plate (44) and the front and rear end portions of the partial annular portion (44b) corresponds to the partition plate insertion hole (45) in the peripheral wall of the tank main body (41). Engage with both ends. The inner peripheral edge of the main body (44a) of the partition plate (44) fits into the groove (46) of the tank main body (41), and the stepped portion (44c) is a partition plate on the peripheral wall of the tank main body (41). While engaged with both ends of the insertion hole (45), the inner peripheral edge of the main body (44a) is brazed to both side surfaces and the bottom surface of the concave groove (46), and the stepped portion (44c) is (41) The both sides of the longitudinal direction of the header tank (40) of the annular portion (44b) are brazed to both ends of the partition plate insertion hole (45) in the peripheral wall of (41), and the partition plate in the tank body (41) The insertion holes (45) are brazed to both side surfaces in the length direction of the header tank (40).

  Here, the inner peripheral surface of the hollow portion (43) of the tank main body (41) by the portion facing the hollow portion (43) of the tank main body (41) in the partition plate insertion hole (45) and the concave groove (46). Further, blocking means for blocking the movement of the partition plate (44) in the length direction of the header tank is formed.

  The pipe connection plate (42) is formed by bending a brazing sheet having a brazing filler metal layer on both sides, here an aluminum brazing sheet into a circular arc in cross section, and is formed on the inner half of the tank body (41). It has come along. The pipe connecting plate (42) has a plurality of through-hole insertion holes (47) that are long in the front-rear direction and arc-shaped (sub-arc-shaped) when viewed from the length direction of the header tank (40). 40) with an interval in the length direction. Further, at positions corresponding to the partition plate insertion holes (45) at the front and rear side edges of the pipe connection plate (42), the pipe connection plate (42) protrudes outward and extends along the outer peripheral surface of the tank body (41), and the partition plate insertion holes ( 45) covers both the front and rear ends, thereby engaging the front and rear ends of the outer peripheral edge of the partial annular portion (44b) of the partition plate (44) and the front and rear edges of the outer peripheral surface of the tank body (41). An engaging claw (48) is integrally formed and is brazed to the tank body (41) and the partition plate (44).

  As shown in FIG. 13, the engaging claw (48) is a protruding piece for engaging claw formation that protrudes straight outward (FIG. 13) before the partition plate (44) is inserted into the partition plate insertion hole (47). 48A). Then, after fitting the partition plate (44) into the partition plate insertion hole (47) from the outside, the engaging claw-forming projecting piece (48A) is bent, and the partial annular portion of the partition plate (44) ( Engaging claws (48) that engage with both front and rear ends of the outer peripheral edge of 44b) and front and rear side edges of the outer peripheral surface of the tank body (41) are formed.

  A through-hole communication hole (49) is formed in the inner part of the peripheral wall of the tank main body to connect the pipe insertion hole (47) of the pipe connection plate (42) to the hollow portion (43) of the tank main body (41). ing. Each communication hole (49) is formed at a position corresponding to each tube insertion hole (47) of the tube connection plate (42). The communication hole (49) is semicircular when viewed from the length direction of the header tank (40), and the length in the front-rear direction is larger than the width of the heat exchange pipe (4). The front and rear ends of the communication hole (49) are formed integrally with the front and rear side edges of the pipe connection plate (42), project outward, and brazed to the outer peripheral surface of the tank body (41) (50 ).

It is a perspective view which shows the whole structure of the gas cooler to which the heat exchanger by this invention is applied. FIG. 2 is a partially omitted vertical sectional view of the gas cooler of FIG. FIG. 3 is a partially enlarged view of FIG. 2. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 2. FIG. 3 is an enlarged sectional view taken along the line CC in FIG. 2. FIG. 3 is an enlarged sectional view taken along line DD in FIG. 2. FIG. 2 is an exploded perspective view showing three plates, an inlet side pipe connecting member, and an outlet side pipe connecting member constituting the first header tank in manufacturing the gas cooler of FIG. 1. FIG. 3 is an exploded perspective view showing three plates constituting a second header tank in manufacturing the gas cooler of FIG. 1. FIG. 2 is a cross-sectional view showing a state in which a partition plate is inserted after combining three plates constituting both header tanks in manufacturing the gas cooler of FIG. 1. It is a cross-sectional view of the part of the partition plate which shows the modification of a header tank. It is a cross-sectional view of the heat exchange pipe portion of the header tank of FIG. It is a cross-sectional view which shows the state which inserts a partition plate, after combining the tank main body and pipe | tube connection plate of the header tank of FIG.

Explanation of symbols

(1): Gas cooler (heat exchanger)
(2): First header tank
(3): Second header tank
(4): Heat exchange pipe
(7): Tank body
(7a): Outward bulge
(7A): 1st plate
(7B): Second plate
(8): Pipe connection plate
(9): Hollow part
(10A): Entrance header
(10B): Exit header
(11): Partition plate
(18): Tube insertion hole
(19): Side covering wall
(20): Intermediate header
(21): engaging claw
(22): Communication hole
(27): Partition plate insertion hole
(40): Header tank
(41): Tank body
(42): Pipe connection plate
(43): Hollow part
(44): Partition plate
(44a): Circular body
(44b): Partial annular part
(44c): Step
(45): Partition plate insertion hole
(46): Groove
(47): Tube insertion hole
(48): Engagement claw
(49): Communication hole

Claims (9)

Each header includes a pair of header tanks arranged at a distance from each other, and a plurality of heat exchange pipes arranged in parallel between both header tanks and having both ends connected to both header tanks. The tank is composed of a tank main body and a pipe connecting plate that covers a surface of the tank main body facing the heat exchange pipe side and is joined to the tank main body. One header portion is provided, the tank body has a hollow portion extending in the length direction of the header tank and open at both ends, and a partition plate for closing the hollow portion is disposed at at least both ends of the tank body. Accordingly, at least one header portion is formed in each header tank, and a plurality of tube insertion holes are formed in the portion corresponding to the header portion in the tube connection plate. It is formed in a penetrating shape with an interval in the length direction, and the end of the heat exchange pipe is inserted into the pipe insertion hole and brazed to the pipe connection plate, and the pipe insertion hole of the pipe connection plate is inserted into the tank body. In the heat exchanger in which a communication hole is formed that allows the tank body to pass through the hollow portion of the tank body,
A partition plate insertion hole for inserting the partition plate from the outside is formed in the tank body, and the partition plate is inserted from the outside into the partition plate insertion hole so that the outer edge of the partition plate is exposed to the outside of the tank body. Are provided on the inner peripheral surface of the hollow portion of the tank body to prevent the partition plate from moving in the length direction of the header tank. A heat exchanger in which engagement claws are provided to engage both front and rear end portions of the outer edge portion and front and rear side edge portions of the outer surface of the tank body, and the engagement claws are brazed to the partition plate and the tank body. A partition plate insertion hole is formed in the tank body in a penetrating manner, both front and rear ends of the partition plate insertion hole are located inward of the front and rear sides of the tank body, and both front and rear side edges of the partition plate insertion hole are straight. The surface facing the tank body of the pipe connection plate is a flat surface, both the front and rear side edges and the inner side edge of the partition plate are straight, and the front and rear side edges of the partition plate are the tank body. It is joined to both front and rear edges of the partition plate insertion hole, the inner edge of the partition plate is joined to the surface of the pipe connection plate facing the tank body side, and the inner end opening of the partition plate insertion hole is connected to the pipe The both sides of the header tank in the length direction in the partition plate are joined to the both sides in the length direction of the header tank in the partition plate insertion hole in the tank body, and the hollow portion of the tank body in the partition plate insertion hole Depending on the part facing The heat exchanger of claim 1, wherein the blocking means for preventing movement of the longitudinal direction of the header tanks Setsuban is formed. The outer surface of both front and rear side edges of the tank body is a flat surface, and the outer edge of both front and rear ends of the partition plate and the outer surface of both front and rear edges of the tank body are flush with each other. Heat exchanger. The tank body is interposed between the first plate and the first plate and the pipe connection plate, which are formed with an outward bulging portion extending in the length direction at the center in the front-rear direction and having both ends open. Consisting of a second plate brazed to both plates, a through hole is formed in the second plate of the tank body to allow the tube insertion hole of the pipe connection plate to pass into the outward bulge of the first plate. A partition plate insertion hole is formed so as to straddle the first plate and the second plate, a portion excluding front and rear end portions of the outer edge portion of the partition plate, and an outer surface of the outward bulge portion of the first plate The heat exchanger according to any one of claims 1 to 3, which is flush with each other. 5. The heat according to claim 4, wherein a side wall covering the front and rear side surfaces of the tank body is formed at both front and rear edges of the pipe connecting plate, and an engaging claw is provided at each end of the side wall covering wall. Exchanger. The tank body is composed of one cylindrical body with both ends open, and the inside is a hollow part with both ends open, and the partition plate insertion hole is formed on the peripheral wall of the tank body from the inside to the outside. The partition plate is joined only to the tank main body, and a portion existing in the hollow portion of the tank main body in the partition plate fits in a position corresponding to the partition plate insertion hole in the inner peripheral surface of the tank main body. A concave groove is formed, and a blocking means for blocking the partition plate from moving in the length direction of the header tank is formed by the concave groove and a portion of the partition plate insertion hole facing the hollow portion of the tank body. Item 2. The heat exchanger according to Item 1. The tank body consists of one cylindrical body with both ends open, the partition plate insertion hole is arcuate when viewed from the length direction of the header tank, and the concave groove is a partition plate insertion hole on the inner peripheral surface of the tank body. The groove is arcuate when viewed from the length direction of the header tank, the inner edge of the partition plate is arcuate with the same curvature as the bottom surface of the groove, and the partition plate The outer edge exposed in the direction is an arc having the same curvature as the outer peripheral surface of the tank body, and the step between the inner edge and the outer edge having different curvatures in the partition plate is the partition plate in the peripheral wall of the tank body. The heat exchanger according to claim 6 engaged with both ends of the insertion hole. A circular main body having a radius equal to the radius of curvature of the bottom surface of the groove formed in the inner peripheral surface of the tank main body, and an outer edge that extends to the outside of the main body and is exposed to the outside of the tank main body. The part is composed of a partial annular part having an arc shape with the same curvature as the outer peripheral surface of the partition plate insertion hole tank body, and the stepped part is formed between the main body part and both ends of the partial annular part. The inner peripheral edge of the main body is joined to both side surfaces and the bottom surface of the groove formed in the inner peripheral surface of the tank main body, and the stepped portion is joined to both end portions of the partition plate insertion hole in the peripheral wall of the tank main body. The heat exchanger according to claim 7, wherein both sides in the length direction of the header tank in the annular portion are joined to both side surfaces in the length direction of the header tank of the partition plate insertion hole in the tank body. At least one of the header tanks has a plurality of header portions, and the partition plate is disposed between both end portions of the header tank and adjacent header portions. The heat exchanger in any one of.

Images