JP2006284163A - Integrated heat exchanging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integrated heat exchanging device capable of simplifying arrangement of piping, comparatively reducing an installation space, preventing the impairing of cooling performance, and achieving a supercritical refrigerating cycle. <P>SOLUTION: This integrated heat exchanging device is composed of a gas cooler 1 and an intermediate heat exchanger 2. The gas cooler 1 includes two header tanks 3, 4, and a plurality of heat exchange tubes 5. A refrigerant outlet 27 is formed on the first header tank 3. The intermediate heat exchanger 2 includes an outer tube 31 and an inner tube 32 having two refrigerant passages 30, 40, and connectors 34, 35 fixed to the opposite both ends of the tubes 31, 32 and having first flow passages 41, 45 communicating with the first refrigerant passage 30 and second flow passages 42, 46 communicating with the second refrigerant passage 40. Both connectors 34, 35 of the intermediate heat exchanger 2 are fixed to the header tanks 3, 4 of the gas cooler 1. The second flow passage 42 of one connector 34 of the intermediate heat exchanger 2 communicates with the refrigerant outlet 27 of the gas cooler 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an integrated heat exchange device, and more specifically, for example, intermediate heat for exchanging heat between a refrigerant coming out of a compressor, a gas cooler, an evaporator, a gas-liquid separator, a decompressor, and a gas cooler and a refrigerant coming out of the evaporator. The present invention relates to an integrated heat exchange device that is suitably used as a gas cooler and an intermediate heat exchanger of a supercritical refrigeration cycle using a supercritical refrigerant such as CO ₂ .

  In this specification and claims, the term “aluminum” includes aluminum alloys in addition to pure aluminum. Further, in this specification and claims, the “supercritical refrigeration cycle” means a refrigeration cycle in which the refrigerant is in a supercritical state exceeding the critical pressure on the high-pressure side. The term “refrigerant” means a refrigerant used in a supercritical refrigeration cycle.

  2. Description of the Related Art Conventionally, car air conditioners mounted on automobiles are widely used that are composed of a compressor, a condenser, an evaporator, a gas-liquid separator, and a decompressor, and a refrigeration cycle that uses a chlorofluorocarbon refrigerant.

By the way, in recent years, it has been considered to mount a supercritical refrigeration cycle using a supercritical refrigerant such as CO _{2 in} a car as a car air conditioner. Here, the supercritical refrigerant is a refrigerant that enters a supercritical state exceeding the critical pressure on the high pressure side of the supercritical refrigeration cycle.

  As shown in FIG. 12, the supercritical refrigeration cycle includes a compressor (75), a gas cooler (76), an evaporator (77), an accumulator (78) as a gas-liquid separator, an expansion valve (79) as a decompressor, and An intermediate heat exchanger (80) for exchanging heat between the refrigerant coming out of the gas cooler (76) and the refrigerant coming out of the evaporator (77) is provided.

  By the way, the intermediate heat exchanger (80) in the supercritical refrigeration cycle is a heat exchanger that was not found in the conventional refrigeration cycle using the fluorocarbon refrigerant, and the intermediate heat exchanger (80) is installed in the engine room of the automobile. Efficient storage is an issue, and it is currently considered to be disposed in a portion between the gas cooler (76) and the evaporator (77) in the engine room.

  As an example of the intermediate heat exchanger used in the supercritical refrigeration cycle shown in FIG. 12, a heat exchange tube having one inner fluid hole and a plurality of outer fluid holes formed at intervals around the inner fluid hole, and heat exchange Two inner fluid hole connectors fixed to both ends of the pipe and having a flow path leading to the inner fluid hole, and fixed to the inner side in the length direction of the heat exchange pipe than the inner fluid hole connector, and the outer fluid hole There are known two outer fluid hole connectors having a flow path leading to (see Patent Document 1).

  Further, as another example of the intermediate heat exchanger used in the supercritical refrigeration cycle shown in FIG. 12, a pair of header tanks arranged at a distance from each other, a parallel arrangement between both header tanks, and both ends The unit is composed of a plurality of flat heat exchange pipes connected to the header tank, and each header tank has a double pipe structure comprising a first header pipe and a second header pipe disposed in the first header pipe. A plurality of first fluid passages and second fluid passages are formed in the heat exchange pipe, and both ends of the heat exchange pipe communicate with the first fluid pipe in the first header pipe and the second fluid passage is the second header. A device connected to both header tanks so as to communicate with the pipe is also known (see Patent Document 2).

However, in the supercritical refrigeration cycle using the intermediate heat exchanger described in Patent Documents 1 and 2, the piping for passing the refrigerant through the intermediate heat exchanger is complicated, and the installation space is relatively large. There's a problem. Also, if an intermediate heat exchanger is placed in the engine room between the gas cooler and the evaporator, the ambient temperature around the intermediate heat exchanger may become very high, There is a possibility that the heat exchange performance between the refrigerant coming out of the gas cooler and the refrigerant coming out of the evaporator is lowered, and as a result, the cooling performance of the supercritical refrigeration cycle is also lowered.
JP 2000-2492 A JP2003-121086

  An object of the present invention is to realize a supercritical refrigeration cycle that solves the above-described problems, simplifies the piping operation, reduces the installation space, and prevents a decrease in cooling performance. Another object of the present invention is to provide an integrated heat exchange device.

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

1) A plurality of first and second header tanks spaced apart from each other, and a plurality of header tanks disposed between the header tanks at intervals in the length direction of the header tank and having both ends connected to both header tanks A first heat exchanger having a refrigerant outlet formed in the first header tank,
A heat exchange section having first and second refrigerant passages, and a first flow path that is provided at both ends of the heat exchange section and that allows the first refrigerant path to communicate with the outside and a second refrigerant path that communicates with the outside. A second heat exchanger comprising a connector having two flow paths,
Both connectors of the second heat exchanger are respectively fixed to the first heat exchanger, and the second flow path of one connector of the second heat exchanger communicates with the refrigerant outlet of the first header tank of the first heat exchanger. Integrated heat exchange device.

  2) One connector of the second heat exchanger is fixed to the first header tank of the first heat exchanger, and the other connector is fixed to the second header tank of the first heat exchanger. The integrated heat exchange device according to 1), wherein the second flow path communicates with the refrigerant outlet of the first header tank of the first heat exchanger.

  3) The first header tank of the first heat exchanger has a plurality of header portions arranged in the length direction, and the second header tank is also 1 more than the number of header portions of the first header tank. Refrigerant having a small number of header parts, the header part at one end of the first header tank becomes a refrigerant inlet header part having a refrigerant inlet, and the header part at the other end of the first header tank has a refrigerant outlet The integrated type according to 2) above, wherein the refrigerant that has become an outlet header portion and flows into the refrigerant inlet header portion from the refrigerant inlet passes through the heat exchange pipe and the header portion and is sent out from the refrigerant outlet of the refrigerant outlet header portion. Heat exchange device.

  4) Both connectors of the second heat exchanger are fixed to the first header tank of the first heat exchanger, and the second flow path of one connector communicates with the refrigerant outlet of the first header tank of the first heat exchanger. The integrated heat exchange device according to 1) above.

  5) The first header tank of the first heat exchanger has a plurality of header portions aligned in the length direction, and the second header tank is also aligned in the length direction of the first header tank. The header portion has the same number of header portions as the header portion, and the header portion at one end of the second header tank is a refrigerant inlet header portion having a refrigerant inlet, and the header portion at the other end portion of the first header tank is a refrigerant outlet. 4) description above, wherein the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet passes through the heat exchange pipe and the header portion and is sent out from the refrigerant outlet of the refrigerant outlet header portion. Integrated heat exchange device.

  6) Each header tank of the first heat exchanger is configured by stacking and brazing a header portion forming plate, a pipe connecting plate, and an intermediate plate interposed between these plates. An outward bulging portion extending in the length direction and having an opening closed by an intermediate plate is formed in the header portion forming plate, and the portion corresponding to the outward bulging portion in the pipe connecting plate is formed. A plurality of tube insertion holes are formed penetrating at intervals in the length direction of the tube connection plate, and each tube insertion hole of the tube connection plate is formed on the intermediate plate so as to bulge outward from the header portion formation plate. A communication hole to be communicated with the inside of the header portion is formed in a penetrating manner. But The integrated heat exchange apparatus according to any one of the above 1) to 5), wherein both ends of the heat exchange pipe are inserted into the pipe insertion holes of the pipe connection plates of both header tanks and brazed .

  7) A covering wall that covers the entire length of the boundary portion between the header forming plate and the intermediate plate is integrally provided on both side edges of the pipe connecting plate, and the covering wall is formed between the header forming plate and the intermediate plate. The integrated heat exchange apparatus according to 6) above, which is brazed to both side surfaces.

  8) One of the above-mentioned 7), wherein an engaging portion that engages with the outer surface of the header portion forming plate is integrally provided at the front end portion of the covering wall, and the engaging portion is brazed to the header portion forming plate. Body heat exchange device.

  9) The heat exchanging part of the second heat exchanger is composed of an outer tube and an inner tube provided at intervals in the outer tube, and a gap between the outer tube and the inner tube serves as a first refrigerant passage. The integrated heat exchange device according to any one of 1) to 8) above, wherein the second refrigerant passage is formed in the inner pipe.

  10) A fin is provided between the outer tube and the inner tube of the second heat exchanger, and both ends of the inner tube protrude outward from the outer tube, and at least at the tip of the outer protruding portion. The integrated heat exchange device according to 9) above, wherein a finless portion is provided, and the finless portion of the inner tube is inserted into the end of the second flow path of both connectors.

  11) The integrated heat exchange device according to 10) above, wherein the fins are integrally formed so as to be circumferentially spaced on the outer peripheral surface of the inner tube and extend in the length direction of the inner tube.

  12) The integrated heat exchange device according to 10) or 11) above, wherein the entire outward protruding portion of the inner tube protruding from the outer tube is a finless portion.

  13) A compressor, a gas cooler, an evaporator, a gas-liquid separator, 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. A refrigeration cycle to be used, wherein the gas cooler comprises the first heat exchanger of the integrated heat exchange device described in any one of the above 1) to 12), and the intermediate heat exchanger is also the second heat exchange. Supercritical refrigeration cycle consisting of a container.

  14) The above description 13), wherein the low-pressure refrigerant coming out of the evaporator flows in the first refrigerant passage of the intermediate heat exchanger, and the high-pressure refrigerant coming out of the gas cooler also flows in the second refrigerant passage. Supercritical refrigeration cycle.

  15) The supercritical refrigeration cycle according to 13) or 14) above, wherein the supercritical refrigerant is carbon dioxide.

  16) A vehicle on which the supercritical refrigeration cycle according to any one of the above 13) to 15) is mounted as a car air conditioner.

  According to the integrated heat exchange device of 1) to 5) above, both connectors of the second heat exchanger are fixed to the first heat exchanger, respectively, and the second flow path of one connector in the second heat exchanger is Since the refrigerant communicates with the refrigerant outlet of the first header tank of the first heat exchanger, the refrigerant sent out from the first heat exchanger through the refrigerant outlet directly flows into the second flow path of the connector of the second heat exchanger. It will flow into the 2nd refrigerant passage through, and piping between the refrigerant outlet of the 1st heat exchanger and the 2nd heat exchanger becomes unnecessary. Therefore, in a refrigeration cycle to which this integrated heat exchange device is applied, for example, a supercritical refrigeration cycle, the piping can be simplified and the installation space can be made relatively small. When this integrated heat exchange device is applied to a supercritical refrigeration cycle and the first heat exchanger is used as a gas cooler and the second heat exchanger is used as an intermediate heat exchanger, the gas cooler is usually placed at the forefront of the engine room. As a result, the ambient temperature around the intermediate heat exchanger is relatively low, and the thermal influence from the surroundings is reduced. Therefore, it is possible to prevent a decrease in heat exchange performance between the refrigerant that has come out of the gas cooler and the refrigerant that has come out of the evaporator, and as a result, it is also possible to prevent a decrease in the cooling performance of the supercritical refrigeration cycle.

  According to the integrated heat exchange devices 2) to 5), it is possible to set the refrigerant flow direction in the first heat exchanger to be suitable for improving the heat exchange performance.

  According to the integrated heat exchange device of 6) above, no closing parts such as caps are required to close both ends of the header tank of the first heat exchanger. Therefore, the number of parts is reduced and the operation of joining closed parts such as caps is not necessary. Moreover, it is not necessary to make a separate closure component such as a cap. In addition, since the header portion forming plate having the outward bulging portion, the tube connecting plate having the tube insertion hole, and the intermediate plate having the communication hole can be formed by, for example, pressing a metal plate, The processing time is reduced and the processing time is shortened. In addition, when a plurality of header portions are formed as in the integrated heat exchange devices 3) and 5), no separate member such as a partition is required.

  According to the integrated heat exchange device of 7) above, leakage of the refrigerant from the boundary portion between the header portion forming plate and the intermediate plate can be prevented by the covering wall.

  According to the integrated heat exchange apparatus of 8), when the three plates are brazed, the three plates can be temporarily fixed by the engaging portion. do not need.

  According to the integrated heat exchange device of 9) above, the heat exchanging part of the second heat exchanger is composed of the outer pipe and the inner pipe provided at intervals in the outer pipe, so that the number of parts is reduced.

  According to the integrated heat exchange device of 10) above, since the fin is provided between the outer tube and the inner tube of the second heat exchanger, the transfer between the refrigerant flowing in the first and second refrigerant passages is performed. The heat area is increased and the heat exchange efficiency is improved.

  According to the integrated heat exchange device of 11) above, the heat transfer area between the refrigerants flowing in the first and second refrigerant passages of the second heat exchanger is increased, and the heat exchange efficiency is improved. Further, since the fins are integrally formed with the inner tube, the number of parts is further reduced.

  According to the integrated heat exchange device of 12), the flow resistance to the refrigerant flowing into the first flow path of the connector of the second heat exchanger or the fluid flowing out from the first flow path is reduced.

  According to the supercritical refrigeration cycle of the above 13) to 15), the refrigerant sent out from the first heat exchanger through the refrigerant outlet is directly passed through the second flow path of the connector of the second heat exchanger. It will flow into a refrigerant passage, and piping between the refrigerant outlet of the 1st heat exchanger and the 2nd heat exchanger becomes unnecessary. Therefore, in this supercritical refrigeration cycle, the piping can be simplified and the installation space can be made relatively small. In addition, since the gas cooler is usually disposed at the forefront in the engine room, the ambient temperature around the intermediate heat exchanger is relatively low, and is less likely to be affected by heat from the surroundings. Therefore, it is possible to prevent a decrease in heat exchange performance between the refrigerant that has come out of the gas cooler and the refrigerant that has come out of the evaporator, and as a result, it is also possible to prevent a decrease in the cooling performance of the supercritical refrigeration cycle.

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

  In the following description, the top, bottom, left and right in FIGS. 1, 2, and 10 are referred to as top and bottom and left and right, respectively. Also, the downstream side of the air flowing through the ventilation gap between the adjacent heat exchange tubes (the direction indicated by the arrow X in FIGS. 1 and 11, the back side of the paper in FIGS. 2 and 10) is the front, and the opposite side is the rear. Let's say.

Embodiment 1
This embodiment is shown in FIGS.

  1 and 2 show the overall configuration of the integrated heat exchange device, FIGS. 3 to 8 show the main parts thereof, and FIG. 9 shows how the refrigerant flows in the integrated heat exchange device.

1 and 2, an integrated heat exchange device used in a supercritical refrigeration cycle using a supercritical refrigerant, for example, CO ₂ , includes a gas cooler (1) (first heat exchanger) and an intermediate heat exchanger (2). (Second heat exchanger) is integrated.

  The gas cooler (1) is vertically spaced between the two header tanks (3) (4) and the two header tanks (3) (4). And a plurality of flat heat exchange pipes (5) arranged in parallel, the ventilation gap between adjacent heat exchange pipes (5), and the outside of the heat exchange pipes (5) at both upper and lower ends. Corrugated fins (6) brazed to the heat exchange pipe (5) and side plates made of an aluminum bare material brazed to the corrugated fins (6) respectively arranged on the outer sides of the corrugated fins (6) at both upper and lower ends (7). In this embodiment, the right header tank (3) is referred to as a first header tank, and the left header tank (4) is referred to as a second header tank.

  As shown in FIGS. 2 and 3, the first header tank (3) includes a brazing sheet having a brazing filler metal layer on both sides, here a header forming plate (8) formed from an aluminum brazing sheet, and on both sides. A brazing sheet having a brazing material layer, here a pipe connection plate (9) formed from an aluminum brazing sheet, and a metal bare material, here made of an aluminum bare material and for header connection plate (8) and pipe connection The intermediate plate (10) interposed between the plate (9) is laminated and brazed to each other.

  A plurality of header parts forming plate (8) extending in the vertical direction and having the same bulging height, length and width, here two outward bulging parts (11A) and (11B) are spaced in the vertical direction. Formed. The opening facing the left side of each outward bulge portion (11A) (11B) is closed by the intermediate plate (10). A refrigerant inlet (12) is formed at the top of the upper outer bulging portion (11A) of the header forming plate (8), and communicates with the refrigerant inlet (12) on the outer surface of the outer bulging portion (11A). An inlet member (13) made of metal having a refrigerant inflow passage (14), here made of aluminum bare material, is brazed using the brazing material on the outer surface of the header portion forming plate (8). The header portion forming plate (8) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides.

  A plurality of through-tube insertion holes (18) that are long in the front-rear direction are formed in the pipe connection plate (9) 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 outer bulging portion (11A) of the header forming plate (8), and are also formed in the plurality of tubes in the lower half. The insertion hole (18) is formed within the vertical range of the lower outer bulge portion (11B). 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 each outward bulge (11A) (11B). It protrudes outward from the front and rear side edges of the side bulges (11A) and (11B). The right and left side edges of the pipe connection plate (9) protrude rightward and the tip reaches the outer surface of the header forming plate (8), and the header forming plate (8) and intermediate plate (10) A covering wall (19) that covers the entire boundary portion is integrally formed and brazed to both the front and rear side surfaces of the header portion forming plate (8) and the intermediate plate (10). A plurality of engaging portions (21) that engage with the outer surface of the header portion forming plate (8) are integrally formed at the protruding end of each covering wall (19) at intervals in the vertical direction. It is brazed to the plate (8). The pipe connection plate (9) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides.

  A through-hole communication hole that allows the pipe insertion hole (18) of the pipe connection plate (9) to communicate with the intermediate plate (10) into the outwardly bulging parts (11A) (11B) of the header part forming plate (8). (22) is formed in the same number as the tube insertion hole (18). The communication hole (22) is slightly larger than the tube insertion hole (18), that is, the cross section of the heat exchange tube (5) (see FIG. 4). Each communication hole (22) is formed at a position corresponding to each tube insertion hole (18) of the tube connection plate (9). The plurality of tube insertion holes (18) in the upper half of the pipe connection plate (9) are connected to the upper outer bulge portion via the plurality of communication holes (22) in the upper half of the intermediate plate (10). (11A), the plurality of tube insertion holes (18) in the lower half are also expanded outwardly through the plurality of communication holes (22) in the lower half of the intermediate plate (10). Part (11B) is connected. All the communication holes (22) communicating with the upper outer bulge (11A) and all the communication holes (22) communicating with the lower outer bulge (11B) are respectively in the intermediate plate (10). It is connected by the communication part (23) formed by excising the part between adjacent communicating holes (22). The intermediate plate (10) is formed by pressing an aluminum bare material.

  And the upper half part including the upper outer bulge part (11A) of the header part forming plate (8), the upper half part of the pipe connecting plate (9), and the upper half part of the intermediate plate (10) The refrigerant inlet header portion (24) is formed by the lower half portion including the lower outward bulge portion (11B) of the header portion forming plate (8), and the lower half portion of the pipe connecting plate (9). The refrigerant outlet header (25) is formed by the lower half of the intermediate plate (10). In the refrigerant inlet header portion (24) and the refrigerant outlet header portion (25), the refrigerant passes through the outer bulging portions (11A) and (11B) and the communication portion (23), and passes through the first header tank (3 ) In the length direction.

  Lower projections (8a), (9a), and (10a) that are slightly narrower are formed at the lower ends of the three plates (8), (9), and (10). The intermediate plate (10) is formed with a notch (26) that communicates from the tip of the downward projecting portion (10a) to the communication hole (22) at the lower end, thereby allowing the first header tank (3) to have a refrigerant. A refrigerant outlet (27) communicating with the outlet header (25) is formed (see FIG. 2).

  As shown in FIG. 5, the second header tank (4) has substantially the same configuration as the first header tank (3), and the same components and the same parts are denoted by the same reference numerals. Both header tanks (3) and (4) are arranged so that the pipe connecting plates (9) face each other. The difference between the second header tank (4) and the first header tank (3) is that the header portion forming plate (8) has an outward bulging portion (11A) (11B) of the first header tank (3). The header portion is formed so that one outward bulge portion (28) here extends over both the outward bulge portions (11A) and (11B) of the first header tank (3). The point formed from the upper end to the lower end of the plate (8), the point where the refrigerant inlet is not formed in the outward bulge (28), all the tube insertion holes ( 18) communicates with the outward bulge (28) through all the communication holes (22) of the intermediate plate (10), and all the communication holes (22) of the intermediate plate (10) are adjacent to each other. The notch is not formed in the downward projecting part (10a) of the intermediate plate (10), the point being communicated by the communicating part (23) formed by cutting out the portion between the communicating holes (22) that fit together Is a point. The bulging height and width of the outward bulging portion (28) are equal to the bulging height and width of the outward bulging portions (11A) and (11B) of the first header tank (3). An intermediate header portion (29) is formed by the entirety of the three plates (8), (9), and (10). In the intermediate header portion (29), the refrigerant flows in the length direction of the second header tank (4) through the outward bulge portion (28) and the communication portion (23).

  Both header tanks (3) and (4) are manufactured as shown in FIGS.

  First, a header portion forming plate (8A) having an outward bulging portion (11A) (11B) (28) and a downward projecting portion (8a) by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides (8 ). Also, by pressing the aluminum brazing sheet having a brazing filler metal layer on both sides, the engaging portion forming projection piece straightly connected to the tube insertion hole (18), the covering wall (19), and the covering wall (19) A pipe connecting plate (9) having (21A) and a downward projecting portion (9a) is formed. Furthermore, the intermediate plate (10) which has a communicating hole (22), a communicating part (23), and a downward protrusion part (10a) is formed by pressing an aluminum bear material. A notch (26) is formed in the intermediate plate (10) of the first header tank (3).

  Next, after combining the three plates (8), (9), and (10) in a laminated form, the protruding piece (21A) is bent to form the engaging portion (21), and the engaging portion (21) is formed to the header portion. Engage with the plate (8) for making a temporary fixing body. Thereafter, the three plates (8), (9) and (10) are brazed to each other using the brazing material layer of the header portion forming plate (8) and the brazing material layer of the pipe connecting plate (9), The covering wall (19) is brazed to the front and rear side surfaces of the intermediate plate (10) and the header portion forming plate (8), and the engaging portion (21) is brazed to the header portion forming plate (8). Thus, both header tanks (3) and (4) are manufactured.

  The heat exchange pipe (5) is made of an extruded shape made of metal, here aluminum, and has a wide and flat shape in the front-rear direction, and a plurality of refrigerant passages (5a) extending in the length direction are formed in parallel inside the heat exchange pipe (5). ing. Both ends of the heat exchange pipe (5) are inserted into the pipe insertion holes (18) of both header tanks (3) and (4), respectively, using the brazing material layer of the pipe connection plate (9). It is brazed to the pipe connection plate (9). Note that both ends of the heat exchange pipe (5) enter the communication hole (22) up to an intermediate portion in the thickness direction of the intermediate plate (10). The right end of the heat exchange pipes (5) in the upper half is connected to the first header tank (3) so as to communicate with the upper outer bulge (11A), that is, the refrigerant inlet header (24), The left end portion is connected to the second header tank (4) so as to communicate with the outward bulge portion (28), that is, the intermediate header portion (29). In addition, the right end portion of the plurality of heat exchange pipes (5) in the lower half is connected to the first header tank (3) so as to communicate with the lower outer bulge portion (11B), that is, the refrigerant outlet header portion (25). The left end portion is connected to the second header tank (4) so as to communicate with the outward bulge portion (28), that is, the intermediate header portion (29).

  The corrugated fin (6) is formed in a wavy shape using a brazing sheet having a brazing filler metal layer on both sides, here an aluminum brazing sheet.

  As shown in FIGS. 2 and 6, the intermediate heat exchanger (2) includes an outer pipe (31) extending in the left-right direction and a left-right direction inserted concentrically in the outer pipe (31). The extending inner pipe (32), the fin (33) provided on the outer peripheral surface of the inner pipe (32), and two connectors (34) (35) fixed to both ends of both pipes (31) and (32) The gap between the outer pipe (31) and the inner pipe (32) is the first refrigerant passage (30), and the inner pipe (32) is the second refrigerant passage (40 ). The outer tube (31) and the inner tube (32) form a heat exchange part. Both connectors (34) and (35) of the intermediate heat exchanger (2) are fixed to both header tanks (3) and (4) of the gas cooler (1).

  The outer tube (31) is made of a metal, here, an aluminum extruded shape. The inner pipe (32) is made of a metal, here, an aluminum extruded shape, and a plurality of fins (33) are spaced in the circumferential direction on the outer circumferential surface thereof and extend in the length direction of the inner pipe (32). Are integrally formed. There is a slight gap between the tip of the fin (33) and the inner peripheral surface of the outer tube (31) (see FIG. 7). Both end portions of the inner tube (32) protrude outward from the outer tube (31), and the fin (33) is cut out over the entire outer protrusion to provide a finless portion (32a). . A plurality of inner fins (39) extending over the entire length are integrally formed on the inner peripheral surface of the inner pipe (32) at intervals in the circumferential direction (see FIG. 7).

  Each connector (34) (35) is made of a metal, here, an aluminum block. Hereinafter, the right connector (34) is referred to as a first connector, and the left connector (35) is referred to as a second connector.

  The lower protrusions (8a), (9a), and (10a) of the plates (8), (9), and (10) of the first header tank (3) of the gas cooler (1) are fitted to the upper right end of the first connector (34). A header tank insertion hole (36) is formed (see FIG. 8), and the plates (8), (9) (2) of the second header tank (4) of the gas cooler (1) are formed on the upper left end of the second connector (35). A header tank insertion hole (37) into which the lower protrusions (8a), (9a) and (10a) of 10) are inserted is formed. The lower protrusions (8a), (9a) and (10a) of the plates (8), (9) and (10) of the first header tank (3) of the gas cooler (1) are inserted into the header tank of the first connector (34). The lower protrusions (8a), (9a), and (10a) of the plates (8), (9), and (10) of the second header tank (4) are inserted into the holes (36) and the second connector (35). The first header tank (3) and the first connector (34), and the second header tank (4) and the second connector (35) are inserted into the header tank insertion hole (37) of It is brazed using the brazing material layer of the header forming plate (8) and the pipe connecting plate (9), so that the intermediate heat exchanger (2) can exchange heat with the adjacent gas cooler (1). It is fixed to the gas cooler (1) so as not to block the ventilation gap between the tubes (5).

  On the left side surface of the first connector (34), an outer tube insertion recess (38) for fitting the right end portion of the outer tube (31) is formed, and the right end portion of the outer tube (31) is inserted into the outer tube. It is inserted into the recess (38), and the outer peripheral surface of the outer tube (31) and the peripheral edge of the opening (38) of the outer tube fitting on the left side surface of the first connector (34) are joined by brazing. ing. The first connector (34) has a first flow path (one end opened to the bottom surface of the outer tube fitting recess (38) and the other end opened to the rear surface, and communicated with the first refrigerant passage (30)). 41) is formed. The first connector (34) has one end opened at the bottom surface of the header tank insertion hole (36) and the other end opened at the right end surface of the portion extending in the left-right direction of the first flow path (41); A second flow path (42) communicating with the second refrigerant passage (40) is formed. And the right end part of the finless part (32a) of the inner pipe (32) is inserted into the part extending in the left-right direction of the second flow path (42), and the finless part (32a) of the inner pipe (32). The outer peripheral surface of the first channel (41) is joined to the peripheral edge of the opening of the second channel (42) at the right end surface of the portion extending in the left-right direction of the first channel (41) by brazing. Therefore, the second flow path (42) of the first connector (34) communicates with the refrigerant outlet (27) of the refrigerant outlet header portion (25) of the gas cooler (1), thereby the intermediate heat exchanger (2). The second refrigerant passage (40) communicates with the refrigerant outlet (27) of the gas cooler (1) via the second flow path (42). A female screw hole (43) is formed on the rear surface of the first connector (34). The female screw hole (43) connects a pipe for piping (not shown) for discharging the refrigerant from the first refrigerant passage (30) through the first flow path (41) to the first connector (34). Used for

  On the right side surface of the second connector (35), an outer tube insertion recess (44) for fitting the left end portion of the outer tube (31) is formed, and the left end portion of the outer tube (31) is inserted into the outer tube. Is inserted into the recess (44), and the outer peripheral surface of the outer tube (31) and the opening peripheral edge of the outer tube insertion recess (44) on the right side surface of the second connector (35) are joined by brazing. ing. One end of the second connector (35) opens at the bottom surface of the outer tube fitting recess (44), the other end opens at the rear surface, and communicates with the first refrigerant passage (30). 45) is formed. The second connector (35) has one end opened to the left side and the other end opened to the left end surface of the portion extending in the left-right direction of the first flow path (45), and the second refrigerant passage (40). A second flow path (46) communicating with is formed. The left end of the finless portion (32a) of the inner pipe (32) is inserted into the right end of the second flow path (46), and the outer peripheral surface of the finless portion (32a) of the inner pipe (32) is The first channel (45) is joined to the peripheral edge of the right end opening of the second channel (46) on the left end surface of the portion extending in the left-right direction by brazing. Further, female screw holes (47) and (48) are formed in the rear surface and the left side surface of the second connector (35), respectively. The female screw hole (47) on the rear surface connects a pipe for piping (not shown) for supplying the refrigerant into the first refrigerant passage (30) through the first flow path (45) to the second connector (35). The female screw hole (48) on the left side is used for connecting the pipe for piping (not shown) for discharging the refrigerant from the second refrigerant passage (40) through the second flow path (46) to the second connector. Used to connect to (35).

  The integrated heat exchange apparatus described above is manufactured by assembling all parts and brazing them together.

When the integrated heat exchange device is used in a supercritical refrigeration cycle as shown in FIG. 12, a pipe for pipe extending from the compressor (75) is connected to the refrigerant inlet member (13) of the gas cooler (1), and an intermediate heat exchanger ( The piping pipe extending from the accumulator (78) as a gas-liquid separator is connected to the first connector (35) of 2) using the female screw hole (47) on the rear surface. Connected to. Also, a pipe for piping extending to the compressor (75) is connected to the first connector (34) so as to communicate with the first flow path (41) using the female screw hole (43) on the rear surface, and the second connector (35), a pipe for piping extending to the expansion valve (79) as a pressure reducer is connected to the second flow path (46) using the female screw hole (48) on the left side. This supercritical refrigeration cycle uses CO ₂ as a supercritical refrigerant, and is mounted on a vehicle such as an automobile as a car air conditioner.

In the integrated heat exchange apparatus, as shown in FIG. 9, the high-pressure CO ₂ that has passed through the compressor (75) passes through the refrigerant inflow passage (14) of the refrigerant inlet member (13) and passes through the refrigerant inlet (12) to the gas cooler. Refrigerants of all heat exchange pipes (5) entering the refrigerant inlet header part (24) of the first header tank (3) of (1) and diverting into the upper outer bulge part (11A) It flows into the passage (5a). The CO _{2 that} has flowed into the refrigerant passage (5a) flows leftward in the refrigerant passage (5a) and flows into the intermediate header portion (29) of the second header tank (4). 28) All heat exchange pipes that flow downward through the communication part (23) in the inner plate and the intermediate plate (10) and are divided to communicate in the intermediate header part (29) and in the refrigerant outlet header part (25) The refrigerant flows into the refrigerant passage (5a) of (5), changes the flow direction, flows right in the refrigerant passage (5a), and enters the refrigerant outlet header portion (25) of the first header tank (3). The CO ₂ flowing into the refrigerant outlet header section (25) flows downward through the lower outer bulge section (11B) and the communication section (23) of the intermediate plate (10) to form the refrigerant outlet (27). And flows into the second refrigerant passage (40) through the second flow path (42) of the first connector (34) of the intermediate heat exchanger (2) and flows to the left in the second refrigerant passage (40). Then, it flows into the pipe for piping through the second flow path (46) of the second connector (35) and is sent to the expansion valve (79).

On the other hand, the low-pressure CO ₂ sent from the accumulator (78) passes through the first refrigerant passage (45) of the second connector (35) of the intermediate heat exchanger (2) from the piping pipe. 30) flows into the first refrigerant passage (30) to the right, flows into the pipe pipe via the first flow path (41) of the first connector (34), and is sent to the compressor (75). It is done.

Then, while CO ₂ flows in the refrigerant passage (5a) of the heat exchange pipe (5) of the gas cooler (1), the ventilation gap exchanges heat with the air flowing in the direction indicated by the arrow X in FIGS. To be cooled. The high-pressure refrigerant that has flowed out from the gas cooler (1) that flows in the first refrigerant passage (30) of the intermediate heat exchanger (2) and the evaporator (77) that flows in the second refrigerant passage (40). The low-pressure refrigerant exchanges heat.

Embodiment 2
This embodiment is shown in FIG. 10 and FIG.

  In this embodiment, the left header tank (51) of the gas cooler (50) is referred to as a first header tank, and the right header tank (52) is referred to as a second header tank.

  A plurality of, in this case, two outwardly bulging portions (53A) extend in the vertical direction and have the same bulging height and width on the header portion forming plate (8) of the first header tank (51) of the gas cooler (50). ) (53B) are formed at intervals in the vertical direction, and the opening toward the right side of each outward bulge portion (53A) (53B) is closed by the intermediate plate (10). The length of the upper outer bulge portion (53A) is longer than the length of the lower outer bulge portion (53B). The first intermediate header portion (54) is formed by the portion including the upper outer bulge portion (53A) of the three plates (8), (9), and (10), and the three plates (8), (9) (10) The refrigerant outlet header portion (55) is formed by the portion including the lower outward bulge portion (53B). In the first intermediate header portion (54) and the refrigerant outlet header portion (55), the refrigerant passes through the outer bulge portions (53A) and (53B) and the communication portion (23), and passes through the first header tank ( 51) It flows in the length direction.

  The pipe connection plate (9) has a pipe insertion hole (18) formed in the vertical range of the upper outward bulge part (53A) of the header part forming plate (8), and the lower outer side. There is a tube insertion hole (18) formed in the vertical range of the side bulge portion (53B).

  Lower projections (8a), (9a), and (10a) that are slightly narrower are formed at the lower ends of the three plates (8), (9), and (10). The intermediate plate (10) is formed with a notch (56) that communicates from the tip of the downward projecting portion (10a) to the communication hole (22) at the lower end, thereby allowing the first header tank (51) to have a refrigerant. A refrigerant outlet (57) communicating with the outlet header (55) is formed. Further, upper projections (8b), (9b), and (10b) that are slightly narrower are formed at the upper ends of the three plates (8), (9), and (10), respectively.

  Other configurations of the first header tank (51) are the same as those of the second header tank (4) of the gas cooler (1) of the first embodiment.

  A plurality of, in this case, two outwardly bulging portions (58A) extending in the vertical direction and having the same bulging height and width on the header portion forming plate (8) of the second header tank (52) of the gas cooler (50). ) (58B) are formed at intervals in the vertical direction, and the openings facing the left side of the outward bulging portions (58A) (58B) are closed by the intermediate plate (10). The length of the upper outer bulge (58A) is shorter than the length of the lower outer bulge (58B), and the upper outer bulge (53A) of the first header tank (51) It straddles the two outward bulges (58A) (58B) of the second header tank (52), and the lower outward bulge (58B) of the second header tank (52) is the first header tank (51). It straddles the two outward bulges (53A) and (53B). Then, the refrigerant inlet header portion (59) is formed by the portion including the upper outer bulging portion (58A) of the three plates (8), (9), (10), and the three plates (8), (9), (10) are formed. A second intermediate header portion (61) is formed by a portion including the lower outer bulging portion (58B). In the refrigerant inlet header portion (59) and the second intermediate header portion (61), the refrigerant passes through the outer bulge portions (58A) and (58B) and through the communication portion (23) to the second header tank ( 52) flows in the length direction. A refrigerant inlet (12) is formed at the top of the upper outer bulging portion (58A) of the second header tank (52), and the upper outer bulging portion (58A) communicates with the refrigerant inlet (12). A refrigerant inlet member (13) having an inflow channel (14) is brazed.

  The pipe connecting plate (9) has a pipe insertion hole (18) formed in the vertical range of the upper outward bulging portion (58A) of the header portion forming plate (8), and also has a lower outer side. There is a tube insertion hole (18) formed in a range in the vertical direction of the side bulge portion (58B). The lower protrusions are not formed at the lower ends of the three plates (8), (9), and (10), and naturally, the notches are not formed in the intermediate plate.

  Other configurations of the second header tank (52) are the same as those of the first header tank (3) of the gas cooler (1) of the first embodiment.

  The other configuration of the gas cooler (50) is the same as that of the gas cooler (1) of the first embodiment, and the same components and the same parts are denoted by the same reference numerals.

  The intermediate heat exchanger (62) includes an outer pipe (31) extending in the vertical direction, an inner pipe (32) extending in the vertical direction inserted concentrically in the outer pipe (31), and an inner pipe. (32) includes fins (33) provided on the outer peripheral surface and two connectors (63) (64) fixed to both upper and lower ends of both pipes (31) and (32). The gap between 31) and the inner pipe (32) is the first refrigerant passage (30), and the inner pipe (32) is the second refrigerant passage (40). Both connectors (63), (64) of the intermediate heat exchanger (62) are fixed to the first header tank (51) of the gas cooler (50).

  The outer tube (31), the inner tube (32), and the fin (33) are obtained by directing the outer tube, the inner tube, and the fin of the intermediate heat exchanger (62) of Embodiment 1 in the vertical direction.

  Each connector (63) (64) consists of a block made of metal, here aluminum. Hereinafter, the lower connector (64) is referred to as a first connector, and the upper connector (63) is referred to as a second connector.

  The lower protrusions (8a), (9a), and (10a) of the plates (8), (9), and (10) of the first header tank (51) of the gas cooler (50) are fitted to the right end of the upper surface of the first connector (64). A header tank insertion hole (65) is formed, and the second connector (63) protrudes upward from the right end of the lower surface of the second connector (63) of the plates (8), (9), (10) of the first header tank (51) of the gas cooler (50). A header tank insertion hole (66) into which the portions (8b), (9b) and (10b) are fitted is formed. The lower protrusions (8a), (9a) and (10a) of the plates (8), (9) and (10) of the first header tank (51) of the gas cooler (50) are inserted into the header tank of the first connector (64). The upper protrusions (8b), (9b), and (10b) of the plates (8), (9), and (10) of the first header tank (51) are fitted into the second connector (63). The first header tank (51) and the connectors (63) and (64) are respectively inserted into the header tank insertion hole (66) of the header tank forming plate (8) and pipe connection plate ( The brazing material layer of 9) is brazed so that the intermediate heat exchanger (62) does not block the ventilation gap between the adjacent heat exchange tubes (5) of the gas cooler (50). It is fixed to the gas cooler (50).

  On the left side of the upper surface of the first connector (64), a recess (67) for fitting the outer tube (31) into which the lower end of the outer tube (31) is fitted is formed. It is inserted into the tube insertion recess (67), and the outer peripheral surface of the outer tube (31) and the peripheral edge of the opening of the outer tube insertion recess (67) on the upper surface of the first connector (64) are joined by brazing. Has been. The first connector (64) has a first flow path (one end opened to the bottom surface of the outer tube fitting recess (67) and the other end opened to the rear surface and communicated with the first refrigerant passage (30)). 68) is formed. The first connector (64) has one end opened at the bottom surface of the header tank insertion hole (65) and the other end opened at the lower end surface of the portion extending in the vertical direction of the first flow path (68), and A second flow path (69) communicating with the second refrigerant passage (40) is formed. And the lower end part of the finless part (32a) of the inner pipe (32) is inserted in the part extended in the up-down direction of the 2nd flow path (69), and the finless part (32a) of the inner pipe (32) The outer peripheral surface of the first channel (68) is joined to the peripheral edge of the opening of the second channel (69) at the lower end surface of the portion extending in the vertical direction by brazing. Accordingly, the second flow path (69) of the first connector (64) communicates with the refrigerant outlet (57) of the gas cooler (50), whereby the second refrigerant passage (40) of the intermediate heat exchanger (62) is connected. It communicates with the refrigerant outlet (57) of the refrigerant outlet header portion (55) of the gas cooler (50) via the second flow path (69). Although not shown, the rear surface of the first connector (64) is used to connect a piping pipe for discharging the refrigerant from the first refrigerant passage (30) through the first flow path (68). A female screw hole is formed.

  On the left side of the lower surface of the second connector (63), there is formed a recess (71) for fitting an outer pipe into which the upper end of the outer pipe (31) is fitted, and the upper end of the outer pipe (31) is outside. It is inserted into the recess (71) for pipe insertion, and the outer peripheral surface of the outer pipe (31) and the peripheral edge of the opening (71) for insertion of the outer pipe on the lower surface of the second connector (63) are joined by brazing. Has been. The second connector (63) has a first flow path (one end opened to the bottom surface of the outer pipe fitting recess (71) and the other end opened to the rear surface and communicated with the first refrigerant passage (30)). 72) is formed. The second connector (63) has one end opened on the upper surface and the other end opened on the upper end surface of the portion extending in the vertical direction of the first flow path (72), and in the second refrigerant passage (40). A communicating second flow path (73) is formed. The upper end of the finless portion (32a) of the inner pipe (32) is inserted into the lower end of the second flow path (73), and the outer peripheral surface of the finless portion (32a) of the inner pipe (32) is The first flow path (72) is joined to the peripheral edge of the opening of the second flow path (73) at the upper end surface of the portion extending in the vertical direction by brazing. Although not shown, a pipe for supplying a refrigerant into the first refrigerant passage (30) through the first flow path (72) is connected to the rear surface of the second connector (63). A female screw hole to be used is formed, and the upper surface is also used to connect a pipe for discharging a refrigerant from the second refrigerant passage (40) through the second flow path (73). Screw holes are formed.

  The integrated heat exchange apparatus described above is manufactured by assembling all parts and brazing them together.

When the integrated heat exchange device is used in a supercritical refrigeration cycle as shown in FIG. 12, a pipe for pipe extending from the compressor (75) is connected to the refrigerant inlet member (13) of the gas cooler (50), and an intermediate heat exchanger ( 62) is connected to the second connector (63) so that the piping pipe extending from the accumulator (78) as a gas-liquid separator communicates with the first flow path (72) using the female screw hole on the rear surface. The In addition, a pipe for piping extending to the compressor (75) is connected to the first connector (64) so as to communicate with the first flow path (68) using the female screw hole on the rear surface, and the second connector (63). In addition, a pipe for piping extending to the expansion valve (79) as a pressure reducer is connected so as to communicate with the second flow path (73) using a female screw hole on the upper surface. The supercritical refrigeration cycle uses CO ₂ as a supercritical refrigerant, and is mounted on a vehicle such as an automobile as a car air conditioner.

In the integrated heat exchange apparatus, as shown in FIG. 11, the high-pressure CO ₂ that has passed through the compressor (75) passes through the refrigerant inflow passage (14) of the refrigerant inlet member (13) and passes through the refrigerant inlet (12) to the gas cooler. Refrigerants of all heat exchange pipes (5) entering the refrigerant inlet header part (59) of the second header tank (52) of (50) and diverting into the upper outer bulge part (58A) It flows into the passage (5a). The CO _{2 that} has flowed into the refrigerant passage (5a) flows leftward in the refrigerant passage (5a), flows into the first intermediate header portion (54) of the first header tank (51), and then expands outward. Of the heat exchange pipe (5) that flows downward in the outlet (53A) and through the communication part (23) of the intermediate plate (10), and is divided and communicated into both the intermediate header parts (54) and (61). The refrigerant flows into the refrigerant passage (5a), changes the flow direction, flows right in the refrigerant passage (5a), and enters the second intermediate header portion (61) of the second header tank (52). The CO _{2 that} has entered the second intermediate header section (61) flows downward in the lower outer bulge section (58B) and through the communication section (23) of the intermediate plate (10), and is divided into a second flow. 2 Flowing into the refrigerant passages (5a) of all the heat exchange pipes (5) communicating with the inside of the intermediate header part (61) and the refrigerant outlet header part (55), changing the flow direction, the refrigerant passage (5a) It flows leftward and enters the refrigerant outlet header portion (55) of the first header tank (51). The CO ₂ flowing into the refrigerant outlet header section (55) flows downward through the lower outer bulge section (53B) and the communication section (23) of the intermediate plate (10) to form the refrigerant outlet (57). And flows into the second refrigerant passage (40) through the second flow path (69) of the first connector (64) of the intermediate heat exchanger (62), flows upward in the second refrigerant passage (40), It flows into the pipe for piping through the second flow path (73) of the second connector (63) and is sent to the expansion valve (79).

On the other hand, the low-pressure CO ₂ sent from the accumulator (78) passes through the first refrigerant path (72) of the second connector (63) of the intermediate heat exchanger (62) from the piping pipe. 30) flows into the first refrigerant passage (30) downward, flows into the pipe pipe via the first flow path (68) of the first connector (64), and is sent to the compressor (75). .

While the CO ₂ flows through the refrigerant passage (5a) of the heat exchange pipe (5) of the gas cooler (50), the ventilation gap is heat-exchanged with the air flowing in the direction indicated by the arrow X in FIG. . The high-pressure refrigerant that has come out of the gas cooler (50) that flows in the first refrigerant passage (30) of the intermediate heat exchanger (62) and the evaporator (77) that flows in the second refrigerant passage (40). The low-pressure refrigerant exchanges heat.

  In the first embodiment, both the connectors (63) and (64) of the intermediate heat exchanger (62) of the second embodiment are connected to the second flow path (69) of the first connector (64) and the first header tank (3 ) May be fixed to the first header tank (3) so as to communicate with the refrigerant outlet (27). That is, the first header tank has a plurality of header portions arranged in the length direction, and the second header tank also has one header portion less than the number of header portions of the first header tank. The header portion at one end of the first header tank is a refrigerant inlet header portion having a refrigerant inlet, and the header portion at the other end of the first header tank is a refrigerant outlet header portion having a refrigerant outlet. In the integrated heat exchange device including the gas cooler and the intermediate heat exchanger, both the connectors of the intermediate heat exchanger are arranged so that the second flow path of the first connector communicates with the refrigerant outlet of the first header tank. It may be fixed to the header tank.

  Further, in the second embodiment, the first connector (34) of the intermediate heat exchanger (2) of the first embodiment is used, and the second flow path (42) is the refrigerant outlet (57) of the first header tank (51). And the second connector (35) may be fixed to the second header tank (52). That is, the first header tank has a plurality of header portions arranged in the length direction, and the second header tank is also arranged in the length direction and has the same number of headers as the header portions of the first header tank. And a header part at one end of the second header tank is a refrigerant inlet header part having a refrigerant inlet, and a header part at the other end of the first header tank is a refrigerant outlet header part having a refrigerant outlet. In the integrated heat exchanger comprising the gas cooler and the intermediate heat exchanger, the first connector of the intermediate heat exchanger is fixed to the first header tank of the gas cooler, and the second connector is the second of the gas cooler. It may be fixed to the header tank, and the second flow path of the first connector may communicate with the refrigerant outlet of the first header tank of the gas cooler.

In the above two embodiments, CO ₂ is used as the supercritical refrigerant in the supercritical refrigeration cycle, but is not limited to this, and ethylene, ethane, nitric oxide and the like are used.

  FIGS. 13-19 shows the modification of the heat exchange pipe | tube used for the gas cooler (1) (50) of two integrated heat exchange apparatuses mentioned above. In addition, in the following description regarding the modification of a heat exchange pipe, the upper and lower sides and right and left of FIGS.

  The heat exchange pipe (160) shown in FIGS. 13 and 14 includes flat upper and lower walls (161) and (162) (a pair of flat walls) facing each other, and left and right edges of the upper and lower walls (161) and (162). Spans the left and right side walls (163) (164), and between the left and right side walls (163) (164), spans the upper and lower walls (161) (162), and extends in the length direction with a predetermined distance from each other. And a plurality of refrigerant walls (166) arranged in the width direction inside. Here, the reinforcing wall (165) serves as a partition wall between the adjacent refrigerant passages (166). Further, the passage width of the refrigerant passage (166) is equal over the entire height.

  The left side wall (163) has a double structure, and is integrally formed in a raised shape below the left side edge of the upper wall (161) and extends over the entire height of the heat exchange pipe (160). The inner side wall ridges (168) integrally formed in a raised shape below the upper wall (161) on the inside of the convex ridges (167), and the upper side ridges are integrally formed in a raised shape from the left edge of the lower wall (162). The inner side wall ridges (169) are included. The outer side wall projections (167) are connected to the inner side wall projections (168) (169) and the lower wall (162) with the lower end engaged with the lower left edge of the lower wall (162). It is attached. Both the inner side wall ridges (168) and (169) are brazed to each other. The right side wall (164) is formed integrally with the upper and lower walls (161) (162). A protrusion (169a) extending in the longitudinal direction is integrally formed over the entire length on the tip surface of the inner side wall projection (169) of the lower wall (162), and the inner side wall projection (168) of the upper wall (161). A concave groove (168a) that extends in the longitudinal direction and into which the protrusion (169a) is press-fitted is formed over the entire length.

  The reinforcing wall (165) includes a reinforcing wall projection (170) integrally formed in a raised shape below the upper wall (161), and a reinforcing wall projection formed integrally in a raised shape above the lower wall (162). (171) are brazed to each other.

  The heat exchange pipe (160) is manufactured using a pipe manufacturing metal plate (175) as shown in FIG. The metal plate for tube production (175) is formed by rolling an aluminum brazing sheet having a brazing filler metal layer on both sides, and includes a flat upper wall forming part (176) (flat wall forming part) and a lower part. A wall forming portion (177) (flat wall forming portion), a connecting portion (178) for connecting the upper wall forming portion (176) and the lower wall forming portion (177) and forming the right side wall (164), and the upper wall The convex for the inner side wall that is integrally formed in a raised shape above the side edge opposite to the connecting part (178) in the forming part (176) and the lower wall forming part (177) and forms the inner part of the left side wall (163) It was formed by extending the side edge (right edge) of the upper wall forming part (176) opposite to the connecting part (178) outward in the left and right direction (right side). A plurality of reinforcements integrally formed in an upwardly protruding shape from the outer side wall ridge forming portion (179) and the upper wall forming portion (176) and the lower wall forming portion (177) at predetermined intervals in the left-right direction. Ridges (170) (171) for reinforcing walls, and ridges (170) for reinforcing walls of the upper wall forming portion (176) and ridges (171) for reinforcing walls of the lower wall forming portion (177). It is in a position that is symmetrical with respect to the center line in the width direction. A protrusion (169a) is formed on the tip surface of the inner side wall ridge (169) of the lower wall forming portion (177), and a groove ( 168a) are formed respectively. The heights of the inner side wall projections (168) and (169) and all the reinforcing wall projections (170) and (171) are equal to each other. The thickness of the upper and lower walls of the connecting portion (178) is larger than the thickness of the upper and lower wall forming portions (175) (176), and the upper end surface of the connecting portion (178) and the inner side wall ridges (168) (169) and It is substantially flush with the upper end surfaces of the reinforcing wall projections (170) (171).

  In addition, the aluminum brazing sheet clad with brazing material on both sides is rolled and the side wall ridges (168) (169) and the reinforcing wall ridges (170) (171) are integrally formed. The brazing filler metal layers (shown on both sides and front end surfaces of the side wall ridges (168) and 169) and the reinforcing wall ridges (170) and (171) and the upper and lower wall forming portions (175) and (176) The brazing filler metal layer on the tip of the side wall ridges (168) (169) and the reinforcing wall ridges (170) (171) is thicker than the other brazing filler metal layers. growing.

  Then, the metal plate for tube production (175) is sequentially bent at the left and right side edges of the connecting portion (178) by roll forming (see FIG. 15 (b)) and finally bent into a hairpin shape for the inner side wall. The protrusions (168) and (169) and the reinforcing wall protrusions (170) and (171) are abutted with each other, and the protrusion (169a) is press-fitted into the groove (168a).

  Next, the outer side wall ridge forming part (179) is bent to be along the outer surface of the both inner side wall ridges (168) and (169), and the tip part is deformed to form the lower wall forming part (177). To obtain a bent body (180) (see FIG. 15 (c)).

  Thereafter, the bent body (180) is heated to a predetermined temperature, and the tips of the inner side wall projections (168) (169) are brazed to the tips of the reinforcing wall projections (170) (171), respectively. At the same time, the heat exchange pipe (160) is manufactured by brazing the outer side wall projections (179) and the inner side wall projections (168) (169) and the lower wall formation (177). The The heat exchange pipe (160) is manufactured at the same time as the integrated heat exchange device.

  In the case of the heat exchange pipe (185) shown in FIG. 16, the projections (186) extending over the entire length and the grooves (187) extending over the entire length are formed on the front end surfaces of all the reinforcing wall projections (170) on the upper wall (161). Are formed alternately. In addition, the protrusions (186) of the reinforcing wall projections (170) of the upper wall (161) that are in contact with the leading ends of all the reinforcing wall projections (171) of the lower wall (162) are fitted. The concave grooves (188) and the protrusions (189) that fit into the concave grooves (187) of the reinforcing wall projections (170) of the upper wall (161) are alternately formed over the entire length. Other configurations are the same as those of the heat exchange pipe (160) shown in FIGS. 13 and 14, and are manufactured by the same method as the heat exchange pipe (160) shown in FIGS.

  The heat exchange pipe (190) shown in FIG. 17 and FIG. 18 is a reinforcement formed by brazing a reinforcing wall projection (191) integrally formed in a raised shape below the upper wall (161) to the lower wall (162). The wall (165) and the reinforcing wall (165) formed by brazing the reinforcing wall projection (192), which is integrally formed so as to protrude upward from the lower wall (162), to the upper wall (161) are in the left-right direction. In the upper and lower walls (161) (162), the protrusions (193) covering the entire length are integrally formed with the portions of the upper and lower walls (161) (162) where the reinforcing wall projections (192) (191) abut. A concave groove (194) is formed on the front end surface of the projection (193) to fit the front end of the reinforcing wall projection (191) (192), and the front end of the reinforcing wall projection (191) (192). Is fitted into the groove (194) of the protrusion (193) and brazed to the protrusion (193). The thickness in the left-right direction of the protrusion (193) is slightly larger than the thickness in the left-right direction of the reinforcing wall projections (191) (192). Other configurations are the same as those of the heat exchange heat exchange pipe (160) shown in FIGS.

  The heat exchange pipe (190) is manufactured using a metal plate (195) for pipe manufacture as shown in FIG. 19 (a). The metal plate for tube production (195) is formed by rolling an aluminum brazing sheet having a brazing filler metal layer on both sides, and has an upper wall forming portion (176) and a predetermined interval in the left-right direction. A plurality of reinforcing wall ridges (191) and (192), each integrally formed in a raised shape from the lower wall forming portion (177), are provided, and the reinforcing wall ridges (191) of the upper wall forming portion (176) are provided. ) And the reinforcing wall projections (192) of the lower wall forming portion (177) are in positions that are asymmetrical with respect to the center line in the width direction. The heights of the ridges (191) and (192) for both reinforcing walls are equal to each other and are about twice the height of the ridges (168) and (169) for the side walls. Further, in the upper wall forming portion (176) and the lower wall forming portion (177), the lower wall forming portion (177) and the reinforcing wall projections (192) (191) of the upper wall forming portion (176) are in contact with each other. The protrusion (193) extending over the entire length is integrally formed, and a concave groove (194) into which the tip of the reinforcing wall projections (192) (161) is fitted is formed on the tip surface of the protrusion (193). The other structure of the metal plate for tube manufacture (195) is the same as that of the metal plate for tube manufacture (175) shown in FIG.

  Then, the metal plate for tube production (195) is sequentially bent at the left and right side edges of the connecting portion (178) by roll forming (see FIG. 19 (b)) and finally bent into a hairpin shape for the inner side wall. The protrusions (168) and (169) are butted together to press-fit the protrusions (169a) into the grooves (168a), and the top end of the reinforcing wall protrusions (191) of the upper wall forming part (176) In the groove (194) of the projection (193) of the wall forming portion (177), the tip of the reinforcing wall projection (192) of the lower wall forming portion (177) is connected to the protrusion of the upper wall forming portion (176) ( 193) are respectively inserted into the concave grooves (194).

  Next, the outer side wall ridge forming part (179) is bent to be along the outer surface of the both inner side wall ridges (168) and (169), and the tip part is deformed to form the lower wall forming part (177). To obtain a bent body (196) (see FIG. 19 (c)).

  Thereafter, the bent body (196) is heated to a predetermined temperature, and the tips of the inner side wall ridges (168) (169) are brazed to each other, and the tips of the reinforcing wall ridges (191) (192) are attached. By brazing the projections (193), and further brazing the outer side wall projections (179), the inner side wall projections (168) (169) and the lower wall formation (177), An exchange heat exchange tube (190) is manufactured. The heat exchange heat exchange pipe (190) is manufactured simultaneously with the manufacture of the integrated heat exchange device.

It is a perspective view which shows the whole structure of the integrated heat exchange apparatus of Embodiment 1 of this invention. FIG. 2 is a partially omitted vertical sectional view of the integrated heat exchange device of FIG. It is a disassembled perspective view which shows the 1st header tank in the gas cooler of the integrated heat exchange apparatus of FIG. It is an AA line expanded sectional view of FIG. It is a disassembled perspective view which shows the 2nd header tank in the gas cooler of the integrated heat exchange apparatus of FIG. FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 2. FIG. 7 is an enlarged sectional view taken along the line CC in FIG. 6. It is a disassembled perspective view which shows the connection part of the 1st header tank of a gas cooler and the 1st connector of an intermediate heat exchanger in the integrated heat exchange apparatus of FIG. It is a figure which shows the flow of the refrigerant | coolant in the integrated heat exchange apparatus of FIG. It is a figure equivalent to FIG. 2 which shows the whole structure of the integrated heat exchange apparatus of Embodiment 2 of this invention. It is a figure which shows the flow of the refrigerant | coolant in the integrated heat exchange apparatus of FIG. It is a figure which shows a supercritical refrigerating cycle. It is a transverse cross section showing the 1st modification of a heat exchange pipe. It is the elements on larger scale of FIG. It is a figure which shows the manufacturing method of the heat exchange pipe | tube shown in FIG. It is a transverse cross section showing the 2nd modification of a heat exchange pipe. It is a transverse cross section showing the 3rd modification of a heat exchange pipe. It is the elements on larger scale of FIG. It is a figure which shows the manufacturing method of the heat exchange pipe | tube shown in FIG.

Explanation of symbols

(1) (50): Gas cooler (first heat exchanger)
(2) (62): Intermediate heat exchanger (second heat exchanger)
(3) (51): First header tank
(4) (52): Second header tank
(5) (160) (185) (190): Heat exchange pipe
(8): Header forming plate
(9): Pipe connection plate
(10): Intermediate plate
(11A) (11B) (28) (53A) (53B) (58A) (58B): Outward bulge
(12): Refrigerant inlet
(18): Tube insertion hole
(19): Coated wall
(21): Engagement part
(22): Communication hole
(23): Communication part
(24) (59): Refrigerant inlet header
(25) (55): Refrigerant inlet header
(27) (57): Refrigerant outlet
(29) (54) (61): Intermediate header
(30): First refrigerant passage
(31): Outer pipe
(32): Inner pipe
(33): Fin
(34) (35) (63) (64): Connector
(41) (72): First flow path
(42) (73): Second flow path

Claims (16)

First and second header tanks that are spaced apart from each other, and a plurality of heats that are spaced between the header tanks in the length direction of the header tank and that are connected to both header tanks at both ends. A first heat exchanger comprising an exchange pipe and having a refrigerant outlet formed in the first header tank;
A heat exchange section having first and second refrigerant passages, and a first flow path that is provided at both ends of the heat exchange section and that allows the first refrigerant path to communicate with the outside and a second refrigerant path that communicates with the outside. A second heat exchanger comprising a connector having two flow paths,
Both connectors of the second heat exchanger are respectively fixed to the first heat exchanger, and the second flow path of one connector of the second heat exchanger communicates with the refrigerant outlet of the first header tank of the first heat exchanger. Integrated heat exchange device. One connector of the second heat exchanger is fixed to the first header tank of the first heat exchanger, and the other connector is fixed to the second header tank of the first heat exchanger. The integrated heat exchange device according to claim 1, wherein the flow path communicates with a refrigerant outlet of the first header tank of the first heat exchanger. The first header tank of the first heat exchanger has a plurality of header portions arranged in the length direction, and the second header tank is also one less than the number of header portions of the first header tank. A refrigerant outlet header having a header portion, wherein a header portion at one end of the first header tank is a refrigerant inlet header portion having a refrigerant inlet, and a header portion at the other end of the first header tank is a refrigerant outlet. The integrated heat exchange according to claim 2, wherein the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet passes through the heat exchange pipe and the header portion and is sent out from the refrigerant outlet of the refrigerant outlet header portion. apparatus. Both connectors of the second heat exchanger are fixed to the first header tank of the first heat exchanger, and the second flow path of one connector communicates with the refrigerant outlet of the first header tank of the first heat exchanger. The integrated heat exchange apparatus according to claim 1. The first header tank of the first heat exchanger has a plurality of header portions arranged in the length direction, and the second header tank is also arranged in the length direction and the header portion of the first header tank. The header portion at one end of the second header tank is a refrigerant inlet header portion having a refrigerant inlet, and the header portion at the other end portion of the first header tank has a refrigerant outlet. The refrigerant outlet header portion, and the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet passes through the heat exchange pipe and the header portion and is sent out from the refrigerant outlet of the refrigerant outlet header portion. Body heat exchange device. Each header tank of the first heat exchanger is configured by stacking and brazing a header portion forming plate, a pipe connecting plate, and an intermediate plate interposed between these plates. The header forming plate has an outward bulging portion extending in the length direction and closed by the intermediate plate, and a plurality of portions corresponding to the outward bulging portion of the pipe connecting plate are formed. The tube insertion holes are formed in a penetrating manner at intervals in the length direction of the tube connection plate, and each tube insertion hole of the tube connection plate is formed in the outer bulge portion of the header portion formation plate. The communication hole to be communicated is formed in a penetrating shape, and the header portion is formed by the portion including the outward bulging portion of the header portion forming plate and the portion corresponding to the outward bulging portion in the pipe connecting plate and the intermediate plate Are, integrated heat exchange apparatus according to any of claims 1 to 5 both end portions of the heat exchange tubes are brazed is inserted into the tube connecting plates of the tube insertion holes of header tanks. Covering walls that cover the entire length of the boundary between the header forming plate and the intermediate plate are integrally provided on both side edges of the pipe connecting plate, and the covering walls are provided on both side surfaces of the header forming plate and the intermediate plate. The integrated heat exchange apparatus according to claim 6, wherein the integrated heat exchange apparatus is brazed. 8. The integrated heat according to claim 7, wherein an engaging portion that engages with an outer surface of the header portion forming plate is integrally provided at a front end portion of the covering wall, and the engaging portion is brazed to the header portion forming plate. Exchange equipment. The heat exchange part of the second heat exchanger is composed of an outer tube and an inner tube provided at intervals in the outer tube, and a gap between the outer tube and the inner tube serves as a first refrigerant passage. The integrated heat exchange device according to any one of claims 1 to 8, wherein the inside of the inner pipe is a second refrigerant passage. Fins are provided between the outer tube and the inner tube of the second heat exchanger, and both end portions of the inner tube protrude outward from the outer tube, and there is no fin at least at the tip of the outer protruding portion. The integrated heat exchange apparatus according to claim 9, wherein a portion without a fin of the inner tube is inserted into an end portion of the second flow path of both connectors. The integrated heat exchange device according to claim 10, wherein the fins are integrally formed so as to be circumferentially spaced on the outer peripheral surface of the inner tube and extend in the length direction of the inner tube. The integrated heat exchange device according to claim 10 or 11, wherein the entire outward projecting portion of the inner tube projecting from the outer tube is a finless portion. A compressor, a gas cooler, an evaporator, a gas-liquid separator, a decompressor, and an intermediate heat exchanger for exchanging heat between the refrigerant coming out of the gas cooler and the refrigerant coming out of the evaporator, and refrigeration using a supercritical refrigerant A gas cooler comprising the first heat exchanger of the integrated heat exchange device according to any one of claims 1 to 12, and the intermediate heat exchanger also comprising a second heat exchanger. Supercritical refrigeration cycle. The ultra-low pressure refrigerant coming out of the evaporator flows in the first refrigerant passage of the intermediate heat exchanger, and the high-pressure refrigerant coming out of the gas cooler also flows in the second refrigerant passage. Critical refrigeration cycle. The supercritical refrigeration cycle according to claim 13 or 14, wherein the supercritical refrigerant comprises carbon dioxide. A vehicle on which the supercritical refrigeration cycle according to any one of claims 13 to 15 is mounted as a car air conditioner.

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