DE112005002312T5 - Integrated heat exchange device - Google Patents

Abstract

An integrated heat exchanger device with:
a first heat exchanger having first and second header tanks spaced from each other and a plurality of heat exchange tubes disposed between the two header tanks at intervals along the longitudinal direction of the header tanks and each having opposite end portions fixed to the respective header tanks , wherein a refrigerant outlet is formed on the first header tank; and
a second heat exchanger having a heat exchange section with first and second refrigerant passages and connection members provided at the opposite ends of the heat exchange section, and a first flow passage for establishing communication between the first refrigerant passage and the outside of the second heat exchanger and a second flow passage for manufacturing, respectively a communication between the second refrigerant passage and the outside of the second heat exchanger comprises
wherein both connecting members of the second heat exchanger are fixed to the first heat exchanger and the second flow channel of a connecting member of the second heat exchanger with the ...

Description

CROSS REFERENCE RELATED APPLICATIONS

These Application is a registration filed under 35 U.S.C. §111 (a) under Claiming the benefit of 35 U.S.C. §119 (e) (1) of the registration data of Provisional Application Nos. 60 / 613,227 and 60 / 662,353 which on September 28, 2004 and March 17, respectively 2005 according to 35 U.S.C. §111 (b) filed have been performed has been.

TECHNICAL AREA

The present invention relates to an integrated heat exchange device, and more particularly to an integrated heat exchange device suitable for use as a gas cooler and a supercritical refrigeration cycle intermediate heat exchanger, which may include, for example, a compressor, a gas cooler, an evaporator, a gas-liquid separator, a pressure reduction device and an intermediate heat exchanger for performing a heat exchange between a refrigerant flowing out of the gas cooler and a refrigerant flowing out of the evaporator, and in which a supercritical refrigerant such as CO ₂ is used.

Here in and in the attached Claims the term "aluminum" aluminum alloys next to pure aluminum.

STATE OF TECHNOLOGY

traditionally, is a refrigeration cycle, which a compressor, a condenser, an evaporator, a gas-liquid separator and using a pressure reducing device and using a fluorocarbon refrigerant, as a vehicle-mounted car air conditioning widely used used.

In recent years, it has been considered to mount a supercritical refrigeration cycle using a supercritical refrigerant such as CO ₂ to an automobile as an automobile air conditioner. The supercritical refrigerant refers to a refrigerant which comes into a supercritical state when it exceeds the critical pressure on the high pressure side of the supercritical refrigeration cycle.

Like in the 12 is shown, a supercritical refrigeration cycle includes a compressor 75 , a gas cooler 76 , an evaporator 77 , an accumulator 78 serving as a gas-liquid separator, an expansion valve 79 , which serves as a pressure reducing device, and an intermediate heat exchanger 80 to heat exchange between the refrigerant, which is from the gas cooler 76 flows, and the refrigerant, which is from the evaporator 77 flows to perform.

The intermediate heat exchanger 80 The supercritical refrigerant cycle is a heat exchanger that is not used in the conventional refrigeration cycle using a fluorine-hydrocarbon refrigerant. The intermediate heat exchanger 80 must be efficiently housed in the engine compartment of a vehicle and is currently in the engine compartment at an area between the gas cooler 76 and the evaporator 77 accommodated.

A known intermediate heat exchanger, which in the in the 12 The supercritical refrigeration cycle shown includes a heat exchange tube having a single inner fluid port and a plurality of outer fluid ports disposed circumferentially about the inner fluid port; two inner fluid port connecting members which are fixed to opposite end portions of the heat exchange tube and each having a flow passage communicating with the inner fluid port; and two outer fluid port connecting members fixed to the heat exchange tube instead of inside the inner fluid port connecting members with respect to the longitudinal direction of the heat exchange tube and each having a flow channel communicating with the outer fluid ports (see JP-A Publication) No. 2000-2492).

Another known intermediate heat exchanger, which in the in the 12 shown supercritical refrigeration cycle is used, comprises a pair of header tanks, which are separated from each other; and a plurality of flat heat exchange tubes, which are arranged in parallel between the header tanks and whose opposite ends are connected to the respective header tanks (see JP-A Publication No. 2003-121086). Each of the header tanks has a double tube structure consisting of a first header tank and a second header tank disposed within the first header tank. Each of the sump tubes includes a plurality of first fluid channels and a plurality of second fluid channels formed therein, and the opposite end portions of each heat exchange tube are connected to the two header tanks so that the first fluid channels communicate with the interior of the first header tank and the first communicate second fluid channels with the interior of the second sump ear.

In the case of a supercritical refrigerant circuit Run in which the disclosed in the publications intermediate heat exchanger is used, problems arise in that the conduction path to lead refrigerant through the intermediate heat exchanger, complex and a rela tively large installation space is required. Further, in the case where the intermediate heat exchanger is provided in the engine room at a portion between the gas cooler and the evaporator, the ambient temperature around the intermediate heat exchanger may become very high, and due to the thermal influence of the surrounding atmosphere, the efficiency of the heat exchanger falls between the refrigerant from the gas cooler and the refrigerant flowing out of the evaporator, associated with a possible drop in the cooling capacity of the supercritical refrigeration cycle.

A The object of the present invention is to overcome the above problems and an integrated heat exchange device to create a supercritical Refrigeration circuit can realize, which can simplify the conduction path, the Installation space can make relatively small and a waste in the cooling capacity can prevent.

EPIPHANY THE INVENTION

• 1) Eine integrierte Wärmetauscheinrichtung mit: einem ersten Wärmetauscher, welcher erste und zweite Sammelbehältertanks, die beabstandet voneinander angeordnet sind, und eine Mehrzahl von Wärmetauschrohren, welche zwischen den beiden Sammelbehältertanks in Intervallen entlang der Längsrichtung der Sammelbehältertanks angeordnet sind und jeweils gegenüber liegende Endbereiche haben, die an den entsprechenden Sammelbehältertanks befestigt sind, aufweist, wobei ein Kältemittelauslass an dem ersten Sammelbehältertank ausgebildet ist; und einem zweiten Wärmetauscher, welcher einen Wärmetauschabschnitt mit ersten und zweiten Kältemittelkanälen und Anschlussglieder, die an den gegenüber liegenden Enden des Wärmetauschabschnitts vorgesehen sind und jeweils einen ersten Strömungskanal zur Herstellung einer Kommunikation zwischen dem ersten Kältemittelkanal und der Außenseite des zweiten Wärmetauschers und einen zweiten Strömungskanal zur Herstellung einer Kommunikation zwischen dem zweiten Kältemittelkanal und der Außenseite des zweiten Wärmetauschers aufweisen, umfasst wobei beide Anschlussglieder des zweiten Wärmetauschers an dem ersten Wärmetauscher fixiert sind und der zweite Strömungskanal von einem Anschlussglied des zweiten Wärmetauschers mit dem Kältemittelauslass des ersten Sammelbehältertanks des ersten Sammelbehälters kommuniziert.
• 2) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 1, worin ein Anschlussglied des zweiten Wärmetauschers an dem ersten Sammelbehältertank des ersten Wärmetauschers fixiert ist, das andere Anschlussglied des zweiten Wärmetauschers an dem zweiten Sammelbehältertank des ersten Wärmetauschers fixiert ist, und der zweite Strömungskanal von einem Anschlussglied mit dem Kältemittelauslass des ersten Sammelbehältertanks des ersten Wärmetauschers kommuniziert.
• 3) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 2, worin der erste Sammelbehältertank des ersten Wärmetauschers eine Mehrzahl von Sammelbehälterabschnitten hat, die in seiner Längsrichtung angeordnet sind; der zweite Sammelbehältertank des ersten Wärmetauschers einen Sammelbehälterabschnitt (Sammelbehälterabschnitte) hat, der in der Anzahl um eins geringer als die Sammelbehälterabschnitte des ersten Sammelbehälters ist; ein Sammelbehälterabschnitt an einem Ende des ersten Sammelbehältertanks als ein Kältemitteleinlass-Sammelbehälter-Abschnitt dient, der einen Kältemitteleinlass aufweist; und ein Sammelbehälterabschnitt an dem anderen Ende des ersten Sammelbehältertanks als ein Kältemittelauslass-Sammelbehälter-Abschnitt dient, der einen Kältemittelauslass aufweist, wobei das Kältemittel, welches von dem Kältemitteleinlass in den Kältemitteleinlass-Sammelbehälter-Abschnitt geströmt ist, durch die Wärmetauschrohre und die Sammelbehälterabschnitte tritt und aus dem Kältemittelauslass des Kältemittelauslass-Sammelbehälter-Abschnitts abgeführt wird.
• 4) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 1, worin beide Anschlussglieder des zweiten Wär metauschers an dem ersten Sammelbehältertank des ersten Wärmetauschers fixiert sind und der zweite Strömungskanal des einen Anschlussgliedes mit dem Kältemittelauslass des ersten Sammelbehältertanks des ersten Wärmetauschers kommuniziert.
• 5) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 4, worin der erste Sammelbehältertank des ersten Wärmetauschers eine Mehrzahl von Sammelbehälterabschnitten hat, die in seiner Längsrichtung angeordnet sind; der zweite Sammelbehältertank des ersten Wärmetauschers Sammelbehälterabschnitte hat, welche entlang seiner Längsrichtung angeordnet sind und in ihrer Anzahl mit der Anzahl der Sammelbehälterabschnitte des ersten Sammelbehältertanks übereinstimmen; ein Sammelbehälterabschnitt an einem Ende des zweiten Sammelbehältertanks als ein Kältemitteleinlass-Sammelbehälter-Abschnitt dient, der einen Kältemitteleinlass hat; und ein Sammelbehälterabschnitt an dem anderen Ende des ersten Sammelbehältertanks als ein Kältemittelauslass-Sammelbehälter-Abschnitt dient, der einen Kältemittelauslass hat, wobei ein Kältemittel, welches von dem Kältemitteleinlass in den Kältemitteleinlass-Sammelbehälter-Abschnitt geströmt ist, durch die Wärmetauschrohre und die Sammelbehälterabschnitte strömt und aus dem Kältemittelauslass des Kältemittelauslass-Sammelbehälter-Abschnitts abgeführt wird.
• 6) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 1, worin jeder Sammelbehältertank des ersten Wär metauschers hergestellt ist, indem eine Sammelbehälterbildende Platte, eine Rohrverbindungsplatte und eine Zwischenplatte, welche zwischen der Sammelbehälter-bildenden Platte und der Rohrverbindungsplatte angeordnet ist, aufeinander gestapelt und verlötet werden; ein gewölbter Bereich an der die Sammelbehälter-bildenden Platte so ausgebildet ist, dass der gewölbte Bereich sich entlang der Längsrichtung von ihr erstreckt und ihre Öffnung durch die Zwischenplatte geschlossen wird; eine Mehrzahl von Rohreinsetzöffnungen in der Rohrverbindungsplatte in einem Bereich, welcher dem gewölbten Bereich entspricht, so ausgebildet ist, dass die Rohreinsetzöffnungen die Rohrverbindungsplatte durchdringen und in Intervallen entlang der Längsrichtung der Rohrverbindungsplatte angeordnet sind; Kommunikationsöffnungen zur Herstellung einer Kommunikation zwischen den Rohreinsetzöffnungen der Rohrverbindungsplatte und dem Innenraum des gewölbten Bereiches der Sammelbehälter-bildenden Platte in der Zwischenplatte so ausgebildet sind, dass die Kommunikationsöffnungen die Zwischenplatte durchdringen; ein Sammelbehälterabschnitt durch einen Bereich der Sammelbehälter-bildenden Platte mit dem gewölbten Bereich und Bereichen der Rohrverbindungsplatte und den Zwischenbereich, welcher dem gewölbten Bereich entspricht, gebildet ist; und die gegenüber liegenden Endbereiche der wärmetauschrohre in die Rohreinsetzöffnungen der Rohrverbindungsplatten von den beiden Sammelbehältertanks eingesetzt und an den Rohrverbindungsplatten festgelötet sind.
• 7) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 6, worin eine Abdeckwandung integral entlang jeder der gegenüber liegenden Seitenkantenbereiche der Rohrverbindungsplatte vorgesehen ist, um eine Grenze zwischen der Sammelbehälter-bildenden Platte und der Zwischenplatte über die gesamte Länge abzudecken; und die Abdeckwandung an den gegenüber liegenden Seitenflächen der Sammelbehälter-bildenden Platte und der zwischenplatte festgelötet ist.
• 8) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 7, worin Eingriffsbereiche, welche mit der Außenfläche der Sammelbehälter-bildenden Platte in Eingriff stehen, integral an den Endbereichen der Abdeckwandungen vorgesehen sind.
• 9) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 1, worin der Wärmetauschabschnitt des zweiten Wärmetauschers ein äußeres Rohr und ein inneres Rohr, welches innerhalb des äußeren Rohrs mit einem dazwischen gebildeten Spalt angeordnet ist, aufweist, wobei der Spalt zwischen dem äußeren Rohr und dem inneren als der erste Kältemittelkanal und der Innenraum des inneren Rohrs als der zweite Kältemittelkanal dient.
• 10) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 9, worin Rippen zwischen dem äußeren Rohr und dem inneren Rohr des zweiten Wärmetauschers vorgesehen sind; die gegenüber liegenden Endbereiche des inneren Rohrs aus dem äußeren Rohr vorstehen; ein rippenfreier Bereich an wenigstens einem Endbereich von jedem der nach außen vorstehenden Bereiche vorgesehen ist; und die rippenfreien Bereiche des inneren Rohrs in Endbereiche der zweiten Strömungskanäle der entsprechenden Anschlussglieder eingesetzt sind.
• 11) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 10, worin Rippen integral an der äußeren Umfangsfläche des inneren Rohrs in Umfangsintervallen so ausgebildet sind, dass sich die Rippen entlang der Längsrichtung des inneren Rohrs erstrecken.
• 12) Eine integrierte Wärmetauscheinrichtung nach Abschnitt 10, worin die Gesamtheit von jedem der nach außen vorstehenden Bereiche des inneren Rohrs, die aus dem äußeren Rohr vorstehen, der rippenfreie Bereich ist.
• 13) Ein überkritischer Kältekreislauf, welcher einen Kompressor, einen Gaskühler, einen Verdampfer, eine Gas-Flüssigkeits-Trennvorrichtung und einen Zwischenwärmetauscher zur Durchführung eines Wärmetauschs zwischen Kältemittel, welches aus dem Gaskühler ausströmt, und Kältemittel, welches aus dem Verdampfer austritt, aufweist und in welchem ein überkritisches Kältemittel verwendet wird, worin der Gaskühler aus dem ersten Wärmetauscher der integrierten Wärmetauscheinrichtung nach einem der Abschnitte 1 bis 12 besteht und der Zwischenwärmetauscher aus dem zweiten Wärmetauscher der integrierten Wärmetauscheinrichtung besteht.
• 14) Ein überkritischer Kältekreislauf nach Abschnitt 13, worin unter niedrigem Druck stehendes Kältemittel, welches aus dem Verdampfer strömt, durch den ersten Kältemittelkanal des Zwischenwärmetauschers strömt, und unter hohem Druck stehendes Kältemittel, welches aus dem Gaskühler strömt, durch den zweiten Kältemittelkanal des Zwischenwärmetauschers strömt.
• 15) Ein überkritischer Kältekreislauf nach Abschnitt 14, worin das überkritische Kältemittel Kohlendioxid ist.
• 16) Ein Fahrzeug, in dem ein überkritischer Kältekreislauf nach Abschnitt 14 als eine Fahrzeugklimaanlage installiert ist.

In order to achieve the above object, the present invention has the following modes.

• 1) An integrated heat exchange device comprising: a first heat exchanger having first and second header tanks spaced apart from each other and a plurality of heat exchange tubes disposed between the two header tanks at intervals along the longitudinal direction of the header tanks and having opposite end portions, respectively; which are attached to the respective header tanks, wherein a refrigerant outlet is formed on the first header tank; and a second heat exchanger having a heat exchange portion with first and second refrigerant channels and connection members provided at the opposite ends of the heat exchange portion and a first flow channel for establishing communication between the first refrigerant channel and the outside of the second heat exchanger and a second flow channel Manufacture of communication between the second refrigerant passage and the outside of the second heat exchanger, wherein the two connecting members of the second heat exchanger are fixed to the first heat exchanger and the second flow channel communicates from a connection member of the second heat exchanger with the refrigerant outlet of the first header tank of the first header.
• 2) An integrated heat exchange device according to clause 1, wherein a connection member of the second heat exchanger is fixed to the first header tank of the first heat exchanger, the other connection member of the second heat exchanger is fixed to the second header tank of the first heat exchanger, and the second flow channel of a connection member with the Refrigerant outlet of the first header tank of the first heat exchanger communicates.
• 3) An integrated heat exchanger device according to section 2, wherein the first header tank of the first heat exchanger has a plurality of header sections arranged in its longitudinal direction; the second header tank of the first heat exchanger has a header section (header sections) that is one fewer in number than the header sections of the first header tank; a header section at an end of the first header tank serves as a refrigerant inlet header section having a refrigerant inlet; and a header section at the other end of the first header tank serves as a refrigerant outlet header section having a refrigerant outlet, wherein the refrigerant that has flowed from the refrigerant inlet into the refrigerant inlet header section passes through the heat exchange tubes and the header sections is discharged from the refrigerant outlet of the refrigerant outlet header section.
• 4) An integrated heat exchange device according to clause 1, wherein both connection members of the second heat exchanger are fixed to the first header tank of the first heat exchanger and the second flow channel of the one connection member communicates with the refrigerant outlet of the first header tank of the first heat exchanger.
• 5) An integrated heat exchanger device according to clause 4, wherein the first header tank of the first heat exchanger has a plurality of header sections arranged in its longitudinal direction; the second header tank of the first heat exchanger has header sections arranged along its longitudinal direction and coincident in number with the number of header sections of the first header tank; a header section at an end of the second header tank serves as a refrigerant inlet header section having a refrigerant inlet; and a sump portion at the other end of the first header tank as a refrigerant telauslass-Sammelbehälter section is used, which has a refrigerant outlet, wherein a refrigerant which has flowed from the refrigerant inlet into the refrigerant inlet header section, flows through the heat exchange tubes and the header sections and is discharged from the refrigerant outlet of the refrigerant outlet header section.
• 6) An integrated heat exchange device according to clause 1, wherein each header tank of the first heat exchanger is made by stacking and soldering a header forming plate, a tube connecting plate and an intermediate plate interposed between the header forming plate and the tube connecting plate; a curved portion on which the sump forming plate is formed so that the curved portion extends along the longitudinal direction thereof and its opening is closed by the intermediate plate; a plurality of tube insertion holes are formed in the tube connection plate in a region corresponding to the curved portion such that the tube insertion holes penetrate the tube connection plate and are arranged at intervals along the longitudinal direction of the tube connection plate; Communicating holes for communicating between the tube insertion holes of the tube connecting plate and the inside of the curved portion of the header forming plate in the intermediate plate are formed so that the communication holes penetrate the intermediate plate; a sump portion is formed by a portion of the sump forming plate having the curved portion and portions of the tube connecting plate and the intermediate portion corresponding to the curved portion; and the opposite end portions of the heat exchange tubes are inserted into the tube insertion holes of the tube connecting plates of the two header tanks and brazed to the tube connecting plates.
• 7) An integrated heat exchanger device according to clause 6, wherein a cover wall is integrally provided along each of the opposite side edge portions of the pipe connection plate to cover a boundary between the sump forming plate and the intermediate plate over the entire length; and the cover wall is soldered to the opposite side surfaces of the header forming plate and the intermediate plate.
• 8) A built-in heat exchange device according to clause 7, wherein engaging portions which engage with the outer surface of the sump forming plate are integrally provided at the end portions of the cover walls.
• 9) An integrated heat exchange device according to clause 1, wherein the heat exchange portion of the second heat exchanger has an outer tube and an inner tube disposed within the outer tube with a gap formed therebetween, the gap between the outer tube and the inner one first refrigerant passage and the inner space of the inner tube serves as the second refrigerant passage.
• 10) An integrated heat exchanger device according to clause 9, wherein fins are provided between the outer tube and the inner tube of the second heat exchanger; protrude the opposite end portions of the inner tube from the outer tube; a rib-free area is provided on at least one end portion of each of the outwardly protruding portions; and the rib-free portions of the inner tube are inserted into end portions of the second flow channels of the respective connection members.
• 11) An integrated heat exchange device according to the section 10, wherein ribs are integrally formed on the outer peripheral surface of the inner tube at circumferential intervals so that the ribs extend along the longitudinal direction of the inner tube.
• 12) An integrated heat exchange device according to clause 10, wherein the entirety of each of the outwardly projecting portions of the inner tube protruding from the outer tube is the fin-free region.
• 13) A supercritical refrigeration cycle including a compressor, a gas cooler, an evaporator, a gas-liquid separator, and an intermediate heat exchanger for performing a heat exchange between refrigerant flowing out of the gas cooler and refrigerant exiting the evaporator, and wherein a supercritical refrigerant is used, wherein the gas cooler consists of the first heat exchanger of the integrated heat exchange device according to any one of sections 1 to 12 and the intermediate heat exchanger consists of the second heat exchanger of the integrated heat exchange device.
• 14) A supercritical refrigeration cycle according to item 13, wherein low-pressure refrigerant flowing out of the evaporator flows through the first refrigerant passage of the intermediate heat exchanger, and high-pressure refrigerant flowing out of the gas cooler flows through the second refrigerant passage of the intermediate heat exchanger ,
• 15) A supercritical refrigeration cycle according to clause 14, wherein the supercritical refrigerant is carbon dioxide.
• 16) A vehicle in which a supercritical refrigeration cycle according to Section 14 is installed as a vehicle air conditioning system.

According to the integrated Heat exchange equipment, which are described in any one of sections 1) to 5) are both connection members of the second heat exchanger at the first heat exchangers The second flow channel is fixed and communicated by a connection member of the second heat exchanger with the refrigerant outlet of the first collection tank of the first heat exchanger. Therefore flows Refrigerant which from the first heat exchanger is left over the refrigerant outlet directly into the second refrigerant channel over the second flow channel the corresponding connection member of the second heat exchanger, so that the line between the refrigerant outlet of the first heat exchanger and the second heat exchanger unnecessary becomes. Accordingly, in a refrigeration cycle such as a supercritical Refrigeration cycle, in which the integrated heat exchange device is used, the cable route are simplified and the installation space be made relatively small. In the case that the integrated heat exchanger device in a supercritical refrigeration cycle is used in such a way that the first and second heat exchangers as a gas cooler or an intermediate heat exchanger will continue to use the ambient temperature around the Intermediate heat exchanger around relatively low because the gas cooler is typically at the front Area of the engine compartment is arranged so that the intermediate heat exchanger less likely to be thermally affected by the environment. Accordingly, it is possible a drop in the efficiency of the heat exchanger between the refrigerant, which from the gas cooler flows, and the refrigerant, which flows out of the evaporator, To prevent such a drop in the cooling capacity of the supercritical Refrigeration circuit to prevent.

According to the integrated Heat exchange equipment according to one of the sections 2) to 5), the flow direction of the refrigerant in the first heat exchanger be given clean to improve the heat exchange efficiency.

According to the integrated Heat exchange device, which is described in section 6), the opposite Ends from each sump tank of the first heat exchanger closed without the use of a closure such as a cap become. Accordingly, the number of parts decreases and becomes the Operation of attaching a closure member such as a cap unnecessary. In addition, will the work of separately making a closure part like a cap, unnecessary. Since the collecting container forming Plate with a corrugated Area, the pipe connection plate with the insertion holes and the intermediate plate with communication openings by pressing, which are performed on a metal plate can be produced can, Furthermore, the number of processing steps can be reduced and the processing time is shortened become. additionally is a separate element such as a partition not required even if a plurality of sump portions as in the integrated heat exchange devices according to the sections 3) and 5) are formed, not required.

According to the integrated Heat exchange device, which is described in section 7), the Abdeckwandungen a Leakage of refrigerant at the boundary between the sump-forming plate and the Prevent intermediate plate.

According to the integrated Heat exchange device, which is described in section 8), if the three plates soldered together The three plates are temporarily attached to means of the engaging areas be fixed to each other. Therefore, a separate clamp to the provisional Fixation not required.

According to the integrated Heat exchange device, which is described in section 9) takes the number of parts from, since the heat exchange section of the second heat exchanger from an outer tube and an inner tube formed inside the outer tube with an intermediate one Gap is arranged exists.

There in the integrated heat exchanger device, which is described in section 10), ribs between the outer tube and the inner tube of the second heat exchanger is provided decreases the heat transfer area between the refrigerant, which through the first refrigerant channel flows, and that flowing through the second refrigerant passage to and takes the heat exchange efficiency to.

at the integrated heat exchanger device, which is described in Section 11), takes the heat transfer area between the refrigerant, which through the first refrigerant channel of the second heat exchanger flows, and that passing through the second refrigerant passage of the second heat exchanger flows, and absorbs the heat efficiency to. Since the ribs are formed integrally with the inner tube, continues to decrease the number of components.

at the integrated heat exchanger device, which is described in section 12), the flow resistance against the refrigerant, which into or out of the first flow channel of each connecting member of the second heat exchanger flows, reduced become.

In the supercritical refrigeration cycle, wel In one of the sections 13) to 15), refrigerant flowing from the first heat exchanger via the refrigerant outlet flows directly into the second refrigerant passage via the second flow passage of the corresponding connection member of the second heat exchanger, so that a line between the refrigerant outlet of the second heat exchanger first heat exchanger and the second heat exchanger is unnecessary. Accordingly, in the supercritical refrigeration cycle, the conduction path can be simplified and the installation space can be made relatively small.

There the gas cooler typically located at the foremost region of the engine compartment is, the ambient temperature will continue to be around the intermediate heat exchanger relatively low, making the intermediate heat exchanger less likely of the environment will be thermally affected. Corresponding is it is possible a drop in the efficiency of the heat exchange between the refrigerant, wel ches from the gas cooler flows, and the refrigerant, which flows out of the evaporator, thereby preventing a drop in the cooling capacity of the supercritical Refrigeration circuit to prevent.

SHORT DESCRIPTION THE DRAWINGS

1 Fig. 15 is a perspective view showing the overall construction of an embodiment 1 of an integrated heat exchanger device of the present invention.

2 FIG. 16 is a partially omitted vertical sectional view illustrating the integrated heat exchange device of FIG 1 shows when viewed from the back to the front.

3 FIG. 11 is an exploded perspective view illustrating a first header tank of the gas cooler of the integrated heat exchange device of FIG 1 shows.

4 is an enlarged sectional view taken along the line AA in the 2 ,

5 FIG. 11 is an exploded perspective view illustrating a second header tank of the gas cooler of the integrated heat exchange device of FIG 1 shows.

6 is an enlarged sectional view taken along the line BB in the 2 ,

7 is an enlarged sectional view taken along the line CC in 6 ,

8th FIG. 10 is an exploded perspective view showing a connection structure for connecting a first port of an intermediate heat exchanger and the first header tank of the gas cooler of the integrated heat exchange device of FIG 1 connect to.

9 is a diagram showing the flow of a refrigerant through the integrated heat exchange device of 1 shows.

10 is a view of which 2 and shows the overall structure of an integrated heat exchanger device according to Embodiment 2 of the present invention.

11 is a diagram showing the flow of a refrigerant through the integrated heat exchange device of the 10 shows.

12 is a diagram showing a supercritical refrigeration cycle.

13 FIG. 10 is a cross-sectional view showing a first modified embodiment of the heat exchange tube. FIG.

14 is an enlarged partial view of the 13 ,

15 is a set of views illustrating a method of making the in 13 shown heat exchange tube shows.

16 FIG. 10 is a cross-sectional view showing a second modified embodiment of the heat exchange tube. FIG.

17 FIG. 10 is a cross-sectional view showing a third modified embodiment of the heat exchange tube. FIG.

18 is an enlarged partial view of the 17 ,

19 is a set of views illustrating a method of making the in 17 shown heat exchange tube shows.

BEST EMBODIMENT THE INVENTION

embodiments The present invention will be described below with reference to the drawings.

In the following embodiments becomes an integrated heat exchange device according to the present Invention of a gas cooler and an intermediate heat exchanger a supercritical refrigeration cycle used.

In the description of Embodiments 1 to 3, the upper, the lower, the left and the the right sides of the 1 . 2 and 10 labeled "top", "bottom", "left" and "right". Further, the downstream side becomes airflow through the air passage gaps between adjacent pairs of heat exchange tubes (the direction indicated by the arrow X in FIGS 1 and 11 is indicated; the backs of the 2 and 10 ) is referred to as the front side and the opposite side as the back side.

Embodiment 1

This embodiment is in the 1 to 9 shown. The 1 and 2 show the overall structure of the integrated heat exchange device; the 3 to 8th show significant areas of it; and the 9 shows a flow of refrigerant within the integrated heat exchanger.

With reference to the 1 and 2 For example, the integrated heat exchange device used in a supercritical refrigeration cycle in which a supercritical refrigerant such as CO _{2 is} used includes a gas cooler 1 (first exchanger) and an intermediate heat exchanger 2 (second exchanger), which are integrated together.

The gas cooler 1 includes two collection tanks 3 . 4 which extend vertically and spaced apart in the left-right direction, a plurality of flat heat exchange tubes 5 which are parallel to each other between the two header tanks 3 . 4 and spaced from each other in the vertical direction, corrugated fins 6 , which in the respective air passage gaps between each adjacent pairs of heat exchange tubes 5 and outside the heat exchange tubes 5 disposed at the upper and lower ends of the radiator and each on the adjacent pair of heat exchange tubes 5 or the tailpipe 5 are soldered, and side plates 7 Made of bright aluminum material, which outside on the respective ribs 6 are arranged at the upper and lower ends and soldered to them. In the case of this embodiment, the right header tank becomes 3 as the "first sump tank" and the left sump tank 4 referred to as the "second header tank".

As in the 2 and 3 1, the first header tank includes 3 a sump forming plate 8th which is made of a brazing sheet having a brazing material layer on opposite surfaces thereof (an aluminum brazing sheet in the present embodiment), a pipe connecting plate 9 made of a brazing sheet having a layer of brazing material on opposite surfaces (an aluminum brazing sheet in the present embodiment), and an intermediate plate 10 which between the sump-forming plate 8th and the pipe connection plate 9 is made of a bare metal material (a bare aluminum material in the present embodiment stages), wherein the plates 8th to 10 arranged in superimposed layers and are soldered together.

In the bin-forming plate 8th are a plurality (two in the present embodiment) curved portions 11A . 11B which are mutually separated from each other in the vertical direction, extend vertically and are equal in curvature height, length and width. An opening from each of the arched areas 11A . 11B , which is directed to the left, is from the intermediate plate 10 locked. A refrigerant inlet 12 is in the top of the upper arched area 11A the plate 8th educated; and an inlet member 13 made of a metal (a bare aluminum material in the present embodiment) and a refrigerant inflow manifold 14 which communicates with the refrigerant inlet 12 is connected to the outer surface of the arched area 11A using the solder material on the outer surface of the sump forming plate 8th soldered. The sump forming plate 8th is made of an aluminum brazing sheet having a brazing material layer on opposite surfaces thereof by pressing.

The pipe connection plate 9 has a plurality of tube insertion openings 18 which extend through the thickness thereof are elongated in the front-to-back direction and spaced apart from each other in the vertical direction. The insertion openings 18 in the upper half of the plate 9 are within the vertical range of the upper arched area 11A the sump-forming plate 8th and the insertion holes 18 in the lower half of the plate 9 are within the vertical range of the lower arched area 11B the sump-forming plate 8th provided. The front-to-back length of each tube insertion hole 18 is slightly larger than the front-to-back width of the arched area 11A or 11B , and the front and rear ends of the tube insertion hole 18 project outwardly beyond the respective leading and trailing edges of the arched area 11A or 11B in front. The pipe connection plate 9 is integral with each of its front and rear side edges with a top wall 19 pointing to the right towards the outer surface of the sump-forming plate 8th protrudes, the boundary between the plate 8th and the intermediate plate 10 covered over its entire length and with the front or rear side surfaces of the plates 8th . 10 soldered, provided. The protruding end of the top wall 19 is integral with engagement areas 21 . which are spaced from each other in the vertical direction and which engage with the outer surface of the plate 8th stand and with the plate 8th are soldered, provided. The pipe connection plate 9 is made of an aluminum brazing sheet by Pres sen, which has a Lötmaterialschicht on its opposite surfaces.

The intermediate plate 10 has communication openings 22 which extend through their thickness and their number equal to the number of tube insertion holes 18 in the pipe connection plate 9 is to the openings 18 to induce, thereby with the arched area 11A or 11B the plate 8th to communicate. The communication openings 22 are significantly larger than the insertion holes 18 ; ie larger in cross section than the heat exchange tubes 5 (please refer 4 ). The communication openings 22 are in corresponding relation to the respective pipe insertion holes 18 the pipe connection plate 9 arranged. The pipe insertion openings 18 in the upper half of the plate 9 communicate with the interior of the upper arched area 11A through the communication openings 22 in the upper half of the intermediate plate 9 , and the tube insertion holes 18 in the lower half of the plate 10 communicate with the interior of the lower arched area 11B through the communication openings 22 in the lower half of the intermediate plate 10 , Both all communication ports 22 , which coincide with the interior of the upper arched area 11A communicate, as well as all communication ports 22 which coincides with the interior of the lower arched area 11B communicate, are from communication areas 23 By cutting away the area between each adjacent pair of openings 22 in the intermediate plate 10 are formed, kept in touch. The intermediate plate 10 is made by pressing from a bare aluminum material.

The upper half of the sump-forming plate 8th which the upper arched area 11A has, the upper half of the pipe connection plate 9 and the upper half of the intermediate plate 10 form a refrigerant inlet header section 24 while the lower half of the sump-forming plate 8th which the lower arched area 11B has, the lower half of the pipe connection plate 9 and the lower half of the intermediate plate 10 a refrigerant outlet header section 25 form. In the refrigerant inlet header section 24 and the refrigerant outlet header section 25 the refrigerant flows along the longitudinal direction of the first header tank 3 about the interiors of the arched areas 11A . 11B and the communication areas 23 ,

Downwardly projecting areas 8a . 9a . 10a , which are slightly narrower in width than the three plates 8th . 9 . 10 are at the corresponding lower ends of the plates 8th . 9 . 10 educated. In the intermediate plate 10 is an incision 26 formed so that it extends from the end of the downwardly projecting area 10a to the lowest communication opening 22 extends, creating a refrigerant outlet 27 which is connected to the refrigerant outlet header section 25 communicates in which he most tank container 3 is formed (see 2 ).

Like in the 5 is shown has the second reservoir tank 4 approximately the same construction as the first header tank 3 , And the same parts are provided with the same reference numerals. The two storage tanks 3 . 4 are with their pipe connection plates 9 arranged opposite each other. The second storage tank 4 is different from the first collection tank 3 in that the sump forming plate 8th a vaulted area 19 which is less in number than the number of outwardly curved portions 11A . 11B of the first collection tank 3 is, and which is from the upper end of the sump-forming plate 8th extends to the lower end, so as to have two arched areas 11A . 11B of the first collection tank 3 to lie opposite; that the outer arched area 18 does not have the refrigerant inlet; that all tube insertion holes 18 the pipe connection plate 9 with the inside of the arched area 28 through all communication openings 22 in the intermediate plate 10 communicate; that all communication ports 22 the intermediate plate 10 from the communication areas 23 obtained by cutting away the area between each adjacent pair of communication openings 22 are trained, kept in communication; and that no cutout in the downwardly protruding area 10a the intermediate plate 10 is trained. The protrusion height and width of the outwardly curved portion 28 are equal to those of the outward curved areas 11A . 11B of the first collection tank 3 , The whole of the three plates 8th . 9 . 10 forms an intermediate collection section 29 , In the intermediate sump section 29 refrigerant flows along the longitudinal direction of the second header tank 4 over the interior of the arched area 28 and the communication areas 23 ,

The collection tanks 3 . 4 are made as it is in the 3 and 5 shown.

First, an aluminum brazing sheet having a brazing material layer on its opposite surfaces is subjected to pressing to form the sump-forming plate 8th with the arched areas 11A . 11B and after below projecting area 8a and the sump forming plate 8th with the arched area 28 and the downwardly protruding area 8a manufacture. Further, an aluminum brazing sheet having a brazing material layer on its opposite surfaces is subjected to a pressing operation to the pipe connecting plates 9 , respectively, the tube insertion openings 18 have, the top walls 19 , the engaging area-forming noses 21A which just from each of the cover walls 19 ablate, and the downwardly projecting area 9a have to form. Furthermore, a bright aluminum material is subjected to a pressing operation to the intermediate plates 10 to form each of the communication openings 22 , the communication areas 23 and the downwardly protruding area 10a exhibit. The cutout 26 gets in the intermediate plate 10 of the first collection tank 3 educated.

Then the three plates 8th . 9 . 10 from each of the collection tanks 3 . 4 in layered form attached to each other; and then the noses become 22a bent over to intervention areas 21 to build. The intervention areas 21 be with the corresponding bin forming plates 8th engaged to form provisionally fixed arrangements. Using the solder layers of the plates 8th . 9 become the three plates 8th . 9 . 10 then soldered together; the cover walls 19 be with the front and rear side surfaces of the intermediate plate 10 and the sump forming plate 8th soldered, and the engaging areas 24 be with the plate 7 soldered.

Each of the heat exchange tubes 5 is made of a metal extrudate (an aluminum extrudate in the present embodiment), is in the form of a flat tube having an increased width in the front-rear direction, and has a plurality of refrigerant channels in its interior 5a which extend longitudinally therethrough and are arranged in parallel. The heat exchange tubes 5 are with the pipe connection plates 9 the two reservoir tanks 3 . 4 using the solder layers of the plates 9 soldered, with their opposite ends in the respective tube insertion openings 18 the tanks 3 . 4 are used. Each end of the pipe 5 is in the communication opening 22 the intermediate plate 10 used up to an intermediate region of its thickness.

The heat exchange tubes 5 in the upper half of the cooler to be manufactured are at their right ends with the first header tank 3 connected to the interior of the upper arched area 11A that is, in the interior space of the refrigerant inlet header section 24 , communicate, and their left ends are connected to the second reservoir tank 3 connected to the interior of the arched area 28 ie, the interior of the intermediate header section 29 , to communicate. Furthermore, the right ends of the heat exchange tubes 5 in the lower half with the first collection tank 3 connected to the interior of the lower arched area 11B ie the interior of the refrigerant outlet header section 25 , communicate, and their left ends are with the second header tank 4 connected to the interior of the arched area 28 ie the interior of the intermediate header section 29 , to communicate.

Each of the ribbed ribs 6 is formed in a waveform from a brazing sheet having a brazing material layer on opposite surfaces (according to the present embodiment, an aluminum brazing sheet).

As in the 2 and 6 is shown includes the intermediate heat exchanger 2 an outer tube 31 that extends in the left-right direction; an inner tube 32 that is concentric inside the outer tube 31 is arranged with a gap formed therebetween and extends in the left-right direction; ribs 33 attached to the outer peripheral surface of the inner tube 32 are provided; and two connecting links 34 . 35 at the opposite ends of the pipes 31 . 32 are fixed. The gap between the outer tube 31 and the inner tube 32 serves as a first refrigerant channel 30 , and the interior of the inner tube 32 serves as a second refrigerant channel 40 , The outer tube 31 and the inner tube 32 form a heat exchange section. The connection links 34 . 35 of the intermediate heat exchanger 32 are at the collection tank 3 . 4 of the gas cooler 1 fixed.

The outer tube 31 consists of a metal extrudate (extruded aluminum in this embodiment). The inner tube 32 consists of a metal extrudate (in this embodiment an extruded aluminum component), and the plurality of ribs 33 is integrally formed on the outer peripheral surface thereof, so that the ribs 33 in the longitudinal direction of the inner tube 32 extend. Between the ends of the ribs 33 and the inner peripheral surface of the outer tube 31 there is a small gap (see 7 ). The opposite end portions of the inner tube 32 stand outward over the outer tube 31 in front. Ribs 33 are from the outside protruding areas of the inner tubes 32 freed to ribless areas 32a provide. Furthermore, a plurality of inner ribs 39 integral with the inner peripheral surface of the inner tube 32 provided at intervals in the circumferential direction, so that the inner ribs 39 over the entire length of the inner tube 32 extend (see 7 ).

The connection links 34 . 35 are each formed in the shape of a metal block (an aluminum block in the present embodiment). In the following description, the right-side terminal member will be described 34 will be referred to as a first terminal member and will become the left-side terminal member 35 be referred to as a second terminal member.

A collection tank insertion opening 36 is a right end portion of the top of the first connection member 34 formed, and the downwardly projecting areas 8a . 9a . 10a the plates 8th . 9 . 10 of the first collection tank 3 of the gas cooler 1 are in the collection tank insertion opening 36 used (see 8th ). A collection tank insertion opening 37 is in a left end portion of the top of the second terminal member 35 formed, and the downwardly projecting areas 8a . 9a . 10a the plates 8th . 9 . 10 of the second tank tanks 4 of the gas cooler 1 are in the collection tank insertion opening 37 used. The first collection tank 3 and the first connection member 34 are using the solder layers of the collection box forming plate 8th and the pipe connection plate 9 with the downwardly projecting areas 8a . 9a . 10a the plates 8th . 9 . 10 of the first collection tank 3 of the gas cooler 1 which enters the collection tank insertion opening 36 of the first connection member 34 is inserted, soldered together. The second storage tank 4 and the second terminal member 35 are using the solder layers of the sump-forming plate 8th and the pipe connection plate 9 with the downwardly projecting areas 8a . 9a . 10a the plates 8th . 9 . 10 of the second header tank 4 which the collection tank insertion opening 37 of the second connection member 35 is inserted, soldered together. This is how the intermediate heat exchanger becomes 2 a gas cooler 1 attached in such a way that the intermediate heat exchanger 2 the air passage gaps between adjacent pairs of heat exchange tubes 5 of the gas cooler 1 does not close.

An outer tube insertion recess 38 is on the left side surface of the first connection member 34 formed, and the right end of the outer tube 31 is in the outer tube insertion recess 38 used. The outer peripheral surface of the outer tube 31 is by soldering to the left side surface of the first terminal member 34 at a portion which the peripheral edge of the opening of the outer tube insertion recess 38 surrounds, connected. A first flow channel 41 is in the first connection member 34 designed so that one end of the first flow channel 41 to the bottom surface of the outer tube insertion recess 38 is open and the other end of it to the back of the first connection member 34 is open. The first flow channel 41 communicates with the first refrigerant channel 30 , Furthermore, a second flow channel 42 in the first connection member 34 designed so that one end of the second flow channel 42 to the bottom surface of the collection tank insertion opening 36 is open and the other end of it to the right end face of a portion of the first flow channel 41 which extends in the left-right direction, is open. The second flow channel 42 communicates with the second refrigerant channel 42 , A right end region of the rib-free area 32a of the inner tube 32 is in an area of the second flow channel 42 inserted in the left-right direction, inserted, and the outer peripheral surface of the rib-free area 32a of the inner tube 32 is by soldering on the right end surface of the extending in the left-right direction region of the first flow channel 41 at a portion of the peripheral edge of the opening of the second flow channel 42 surrounds, attached. Accordingly, the second flow channel communicates 42 of the first connection member 34 with the refrigerant outlet 27 of the refrigerant outlet header section 25 of the gas cooler 1 , whereby the second refrigerant channel 40 of the intermediate heat exchanger 2 with the refrigerant outlet 27 of the gas cooler 1 over the second flow channel 42 communicated. Furthermore, an opening provided with an internal thread 43 at the back of the first connection member 34 educated. This internally threaded opening 43 is used to a conduit (not shown) for discharging refrigerant from the interior of the first refrigerant channel 30 over the first flow channel 41 at the first connection member 34 to join.

An outer tube insertion recess 44 is on the right side surface of the second connection member 35 formed, and the left end of the outer tube 31 is in the outer tube insertion recess 44 used. The outer peripheral surface of the outer tube 31 is by soldering on the right side surface of the second terminal member 35 at a portion which the peripheral edge of the opening of the outer tube insertion recess 44 surrounds, attached. A first flow channel 45 is in the second connection member 35 designed so that one end of the first flow channel 45 to the bottom surface of the outer tube insertion recess 44 is open and the other end of it to the back of the second connection member 35 is open. The flow channel 45 communicates with the first refrigerant channel 30 , Furthermore, a second flow channel 46 in the second connection member 35 designed so that one end of the second flow channel 46 to the left side surface of the second connection member 35 is open and the other end of it to the lin ken end surface of a region of the first flow channel 45 , which extends in the left-right direction, is open. The second flow channel 46 communicates with the second refrigerant channel 40 , A left end region of the rib-free region 32a of the inner tube 32 is in a right end portion of the second flow channel 46 used, and the outer peripheral surface of the rib-free area 32a of the inner tube 32 is by soldering on the left end surface of the left to right extending portion of the first flow channel 45 at a portion which the peripheral edge of the right opening of the second flow channel 46 surrounds, attached. Furthermore, provided with internally threaded openings 47 . 48 on the back or the left side surface of the second connection member 35 educated. The internally threaded opening 47 , which is formed in the back, is used to attach to the second terminal member 35 a conduit (not shown) to connect to the interior of the first refrigerant channel 30 over the first flow channel 45 To supply refrigerant. The internally threaded opening 48 , which is formed in the left side surface, is used to attach to the second terminal member 35 a conduit (not shown) to attach to refrigerant from the interior of the second refrigerant channel 40 over the second flow channel 46 dissipate.

The above-described integrated heat exchange device is made by assembling all the components and soldered become.

If the integrated heat exchanger is used for a supercritical refrigeration cycle, as in 12 is shown, a conduit extending from the compressor 75 extends, with the refrigerant inlet element 13 of the gas cooler 1 connected and becomes a conduit extending from the accumulator 78 extends, which serves as a gas-liquid separator, with the second connection member 35 of the intermediate heat exchanger 2 using the female threaded opening 47 connected at the back to near communication with the first flow channel 45 manufacture. Furthermore, a conduit which goes to the compressor 75 extends, with the first connection member 34 using the female threaded opening 43 connected to communicate with the first flow channel 41 manufacture. Furthermore, a conduit that extends to the expansion valve 79 which serves as a pressure reducing device extends with the second terminal member 35 using the female threaded opening 48 connected to the left side surface to communicate with the second flow channel 46 manufacture. This supercritical refrigeration cycle uses CO ₂ as a supercritical refrigerant and is installed on a vehicle such as a car as a car air conditioner.

In the integrated heat exchange device occurs, as in the 9 is shown, under high pressure CO ₂ , which by the compressor 75 has passed through the refrigerant inflow 14 of the refrigerant inlet element 13 and then enters the interior of the refrigerant inlet header section 24 of the first collection tank 3 of the gas cooler 1 from the refrigerant inlet 2 here. The CO ₂ then flows divided into the refrigerant channels 5a from all heat exchange tubes 5 which coincides with the interior of the upper dented area 11A keep in touch. The CO ₂ in the channels 5a flows through the channels 5a and enters the interior of the intermediate header section 29 of the second header tank 4 and then flows over the interior of the arched area 28 and the communication areas 23 the intermediate plate 10 downward. The CO ₂ then flows subdivided into the channels 5a from all those heat exchange tubes 5 which communicates with the interior of the intermediate collection container section 29 in communication and with the interior of the refrigerant outlet header section 25 communicating, thereby changing its direction of flow, flows to the right through the channels 5a and enters the refrigerant outlet header section 25 of the first collection tank 3 one. The in the refrigerant outlet header section 25 Exceeded CO ₂ flows over the interior of the lower arched area 11B and the communication areas 23 the intermediate plate 10 down and then flows into the second refrigerant channel 40 via the refrigerant outlet 27 and the second flow channel 42 of the first connection member 34 of the intermediate heat exchanger 2 one. The CO ₂ then flows to the left within the second refrigerant channel 40 , enters the conduit via the second flow channel 46 of the second connection member 35 and then the expansion valve 79 fed.

At the same time, low pressure CO ₂ flowing from the accumulator flows 78 is fed from the pipeline into the first refrigerant channel 30 over the first flow channel 45 of the second connection member 35 of the intermediate heat exchanger 2 one. Subsequently, the CO _{2 flows} through the first refrigerant passage 30 to the right, then flows into the conduit via the first flow channel 41 of the first connection member 34 and then the compressor 75 fed.

While passing through the channels 5a the heat exchange tubes 5 of the gas cooler 1 flows, the CO ₂ a heat exchange with the air, which through the air passage column in the direction of the arrow X, which in the 1 to 9 is shown, flows, and is thereby cooled. Furthermore, the high-pressure refrigerant, which leaves the gas cooler, exchanges 1 has leaked and through the first refrigerant channel 30 the second heat exchanger 2 flows, heat with the low-pressure refrigerant, which flows out of the evaporator 77 has leaked and through the second refrigerant channel 40 flows.

Embodiment 2

The present embodiment is in the 10 and 11 shown. In the present embodiment, a left side header tank becomes 51 a gas cooler 50 will be referred to as a first header tank and will become a right hand header tank 52 be referred to by him as a second storage tank.

A plurality of (two in the present embodiment) curved portions 53A . 53B are at the sump-forming plate 8th of the first collection tank 51 of the gas cooler 50 attached in such a manner as to be separated from each other in the vertical direction and extend in the vertical direction. The two arched areas 53A . 53B have the same curvature height and width. An opening from each of the arched areas 53A . 53B pointing to the right is through the intermediate plate 10 locked. The length of the upper arched area 53A is greater than that of the lower arched area 53B , Areas of the three plates 8th . 9 . 10 which the upper arched area 53A include a first intermediate header section 54 while areas of the three plates 8th . 9 . 10 which the lower arched area 53B include a refrigerant outlet header section 55 form. In the first intermediate header section 54 and the refrigerant outlet header section 55 the refrigerant flows along the longitudinal direction of the first header tank 51 about the interiors of the arched areas 53A . 53B and the communication areas 23 ,

The pipe connection plate 9 has tube insertion holes 18 located in the vertical area of the upper arched area 53A the sump-forming plate 8th are formed, and tube insertion openings 18 which are in the vertical area of the lower arched area 53B the sump-forming plate 8th are formed.

Downwardly projecting areas 8a . 9a . 10a , which are slightly narrower in width than the three plates 8th . 9 . 10 are at corresponding lower ends of the plates 8th . 9 . 10 educated. In the intermediate plate 10 is a section 56 formed so that it extends from the lower end of the downwardly projecting area 10a to the lowest communication opening 22 extends, creating a refrigerant outlet 57 connected to the refrigerant outlet sump section 55 communicates in the first header section 51 is formed. Upwardly projecting areas 8b . 9b . 10b , which are slightly narrower in width than the three plates 8th . 9 . 10 are at the corresponding upper ends of the plates 8th . 9 . 10 educated. The remaining areas of the first Sammelbe holding tanks 51 have the same structures as those of the second header tank 4 from the gas cooler 1 Embodiment 1.

A plurality of (in the present embodiment 2) curved portions 58A . 58B are at the sump forming plate 8th of the second header tank 52 of the gas cooler 50 are formed in such a manner as to be separated from each other in the vertical direction and extend in the vertical direction. The two arched areas 58A . 58B have the same curvature height and width. An opening from each of the arched areas 58A . 58B pointing to the left is with the intermediate plate 10 closed. The length of the upper arched area 58A is less than that of the lower arched area 58B , The upper arched area 53A of the first collection tank 53 points to the two arched areas 58A . 58B of the second header tank 52 while the lower arched area of the second header tank 52 to the two arched areas 53A . 53B of the first collection tank 51 has. Areas of plates 8th . 9 . 10 which the upper arched area 58A include a refrigerant inlet header section 59 while areas of the three plates 8th . 9 . 10 which the lower arched area 58B include a second intermediate header section 61 form. In the refrigerant inlet header section 59 and the second intermediate header section 61 a refrigerant flows along the longitudinal direction of the second header tank 52 about the interiors of the arched areas 58A . 58B and the communication areas 23 , A refrigerant inlet 12 is at an upper portion of the upper arched area 58A of the second header tank 52 educated; and a refrigerant inlet member 13 , which has a refrigerant inflow channel 14 has that with the refrigerant inlet 12 communicates is at the upper arched area 58A soldered.

The pipe connection plate 9 has tube insertion holes 18 in the vertical area of the upper arched area 58B the sump forming plate are formed, and pipe insertion openings 18 in the vertical area of the lower arched area 58B the sump-forming plate 8th are formed. Downwardly projecting areas are at the lower ends of the three plates 8th . 9 . 10 not formed, and it is not necessary to say that no cutout is formed in the intermediate plate.

The remaining areas of the second header tank 52 have the same structures as those of the first header tank 3 of the first collection tank 3 of the gas cooler 1 of the embodiment 1.

The remaining areas of the gas cooler 50 have the same structure as those of the gas cooler 1 of Embodiment 1. Like components and like portions are designated by like reference numerals.

The intermediate heat exchanger 62 includes a vertically extending outer tube 31 a vertically extending inner tube 32 that is concentric inside the outer tube 31 is arranged with a gap formed therebetween; ribs 33 , which on the outer peripheral surface of the inner tube 32 are provided; and two connecting links 63 . 64 at the top and bottom ends of the pipes 31 . 32 are attached. The gap between the outer tube 31 and the inner tube 32 serves as a first refrigerant channel 30 , and the interior of the inner tube 32 serves as a second refrigerant channel 40 , The connection links 63 . 64 of the intermediate heat exchanger 62 are at the first collection tank 51 of the gas cooler 50 fixed.

The outer tube 31 , the inner tube 32 and the ribs 33 are identical to the outer tube, the inner tube and the fins of the intermediate heat exchanger 62 of Embodiment 1, but are vertically aligned.

The connection links 63 . 64 are each formed of a metal block (an aluminum block in the present embodiment). In the following description, the lower terminal member 64 be referred to as the first terminal member and is the upper to circuit member 63 be referred to as the second terminal member.

A collection tank insertion opening 65 is in a right end region of the top of the first connection member 64 formed, and the downwardly projecting areas 8a . 9a . 10a the plates 8th . 9 . 10 of the first collection tank 51 of the gas cooler 50 are the sump tank insertion hole 65 used. A sump insertion opening 66 is in a right end region of the underside of the second connection member 63 formed, and the upwardly projecting areas 8b . 9b . 10b the plates 8th . 9 . 10 of the first collection tank 51 of the gas cooler 50 are in the sump insertion holes 66 used. The first collection tank 51 of the gas cooler 50 and the first connection member 64 are using the solder layers of the collection box forming plate 8th and the pipe connection plate 9 with the downwardly projecting areas 8a . 9a . 10a the plates 8th . 9 . 10 of the first collection tank 51 which enters the collection tank insertion opening 65 of the first connection member 64 is inserted, soldered together. The first collection tank 51 and the second terminal member 63 are using the solder layers of the sump-forming plate 8th and the pipe connection plate 9 with the upwardly projecting areas 8b . 9b . 10b the plates 8th . 9 . 10 of the first collection tank 51 which enters the collection tank insertion opening 66 of the second connection member 63 is set, soldered together. This is how the intermediate heat exchanger becomes 62 at the gas cooler 50 attached in such a way that the intermediate heat exchanger 62 the air passage gaps between adjacent pairs of heat exchange tubes 5 of the gas cooler 50 does not close.

An outer tube insertion recess 38 is at a left side portion of the top of the first terminal member 64 formed, and the lower end of the outer tube 31 is in the outer tube insertion recess 38 used. The outer peripheral surface of the outer tube 31 is by soldering to the top of the first terminal member 64 at a portion which the peripheral edge of the opening of the outer tube insertion recess 67 surrounds, connected. A first flow channel 68 is in the first connection member 64 designed so that one end of the first flow channel 68 to the bottom surface of the outer tube insertion recess 67 is open and the other end of it to the back of the first connection member 64 is open. The first flow channel 8th communicates with the first refrigerant channel 30 , Furthermore, a second flow channel 69 in the first connection member 64 designed so that one end of the second flow channel 69 to the bottom surface of the collection tank insertion opening 65 is open and the other end of it to the lower end surface of a vertically extending portion of the first flow channel 68 is open. The second flow channel 69 communicates with the second refrigerant channel 40 , A lower end region of the rib-free area 32a of the inner tube 32 is a vertically extending portion of the second flow channel 69 used, and the outer peripheral surface of the rib-free area 32a of the inner tube 32 is by soldering on the lower end surface of the vertically extending portion of the first flow channel 68 at a portion of the peripheral edge of the opening of the second Strö mung channel 69 surrounds, attached. Accordingly, the second flow channel communicates 69 of the first connection member 64 with the refrigerant outlet 57 of the gas sensor 50 , whereby the second refrigerant channel 40 of the intermediate heat exchanger 62 with the refrigerant outlet 57 the refrigerant outlet header section 55 of the gas cooler 50 over the second flow channel 69 communicated. Although not shown in the drawings, an internally threaded opening is at the back of the first terminal 64 educated. This internally threaded port is provided to a conduit for discharging refrigerant from the inside of the first refrigerant passage 30 over the first flow channel 68 at the first connection member 64 to join.

An outer tube insertion recess 71 is at the left end portion of the underside of the second terminal member 63 formed, and the upper end of the outer tube 31 is in the outer tube insertion recess 71 used. The outer peripheral surface of the outer tube 31 is by soldering to the bottom of the second terminal member 63 at a portion which the peripheral edge of the opening of the outer tube insertion recess 71 surrounds, attached. A first flow channel 72 is in the second connection member 63 designed so that one end of the first flow channel 72 to the bottom surface of the outer tube insertion recess 71 is open and the other end of it to the back of the second connection member 63 is open. The first flow channel 72 communicates with the first refrigerant channel 30 , Furthermore, a second flow channel 73 in the second connection member 63 designed so that one end of the second flow channel 73 to the top of the second connection member 63 is open and the other end of it to the upper end surface of a vertically extending portion of the first flow channel 72 is open. The second flow channel 73 communicates with the second refrigerant channel 40 , An upper end portion of the rib-free area 32a of the inner tube 32 is in a lower end region of the second flow channel 73 used, and the outer peripheral surface of the rib-free area 32a of the inner tube 32 is by soldering on the upper end surface of the vertically extending portion of the first flow channel 72 at an area which the peripheral edge of the opening of the second flow channel 73 surrounds, attached. Although not shown in the drawings, an internally threaded opening is at the rear of the second terminal member 63 educated. The internally threaded opening is used to engage the second connector 63 connect a conduit to the interior of the first refrigerant channel 30 over the first flow channel 72 To supply refrigerant. Furthermore, an opening provided with an internal thread is at the top of the second connecting member 63 educated. This internally threaded opening is used to attach to the second connector 63 connect a conduit to refrigerant from the inner tube space of the second refrigerant channel 40 over the second flow channel 46 dissipate.

The above-described integrated heat exchange device is made by assembling all the components and soldered become.

If the integrated heat exchanger is used for a supercritical refrigeration cycle, as described in the 12 is shown, a conduit extending from the compressor 75 extends, with the refrigerant inlet element 13 of the gas cooler 50 connected and becomes a conduit extending from the accumulator 68 extends, which serves as a gas-liquid separator, with the second connection member 63 of the intermediate heat exchanger 62 using the threaded opening at the rear to communicate with the first flow channel 72 manufacture. Furthermore, a conduit which goes to the compressor 75 extends, with the first connection member 64 connected to the rear using the female threaded port to communicate with the first flow channel 68 manufacture. Furthermore, a conduit that extends to the expansion valve 79 extends, which serves as a pressure reducing device, with the second connection member 63 using the internally threaded opening at the top connected to communicate with the second flow channel 73 manufacture. This supercritical refrigeration cycle uses CO ₂ as a supercritical refrigerant and is installed on a vehicle such as a car as a car air conditioner.

In the integrated heat exchange device occurs, as in the 11 is shown, under high pressure CO ₂ , which by the compressor 75 through the refrigerant inflow channel 14 of the refrigerant inlet element 13 and then enters the interior of the refrigerant inlet header section 59 of the second header tank 52 of the gas cooler 50 from the refrigerant inlet 12 here. The CO ₂ then flows into the refrigerant channels 5a from all heat exchange tubes 5 , which coincide with the interior of the upper arched area 58A keep in touch. The CO ₂ in the channels 5a flows left through the channels 5a and enters the interior of the first intermediate header section 54 of the first collection tank 51 and then flows down over the interior of the upper arched area 53a and the communication areas 23 the intermediate plate 10 , The CO ₂ then flows subdivided into the channels 5a the heat exchange tubes 5 , which with the interiors of both intermediate sump sections 54 . 61 communicate with it, changing its direction of flow, flows to the right through the channels 5a and enters the second intermediate header section 61 of the second header tank 52 one. The CO ₂ , which in the second intermediate header section 61 has entered, flows through the interior of the lower arched area 58B and the communication areas 23 the intermediate plate 10 downward. The CO ₂ then flows subdivided into the channels 5a from all those heat exchange tubes 5 , which communicate with the interior of the second intermediate header section 61 and the interior of the refrigerant outlet header section 55 communicating, changing its flow direction, flows to the left through the channels 5a and enters the refrigerant outlet header section 55 of the first collection tank 51 one. The CO ₂ entering the refrigerant outlet sump section 55 has passed, flows over the interior of the downwardly curved portion 53B and the communication areas 23 the intermediate plate down and then flows into the second refrigerant channel 40 via the refrigerant outlet 57 and the second flow channel 69 of the first connection member 64 of the intermediate heat exchanger 62 , The CO ₂ then flows within the second refrigerant channel 40 upward, enters the conduit via the second flow channel 73 of the second connection member 63 and becomes the expansion valve 79 fed.

At the same time, low pressure CO ₂ flowing from the accumulator flows 78 is supplied from the conduit into the first refrigerant passage 30 over the first flow channel 72 of the second connection member 73 of the intermediate heat exchanger 62 one. Subsequently, the CO _{2 flows} through the first refrigerant passage 30 down, then flows into the conduit via the first flow channel 68 of the first connection member 64 and then the compressor 75 fed. While passing through the channels 5a the heat exchange tubes 5 of the gas cooler 50 flows, the CO _{2 is} subjected to a heat exchange with the air, which through the air passage column in the direction of the arrow X, which in the 11 is shown, flows, and is thereby cooled. Furthermore, the high pressure refrigerant which is exchanged from the gas cooler 50 leaked to the first refrigerant channel 30 of the second heat exchanger 62 flows, heat with the low-pressure refrigerant, which flows out of the evaporator 77 leaked and through the second refrigerant channel 40 flows ,.

In the embodiment 1 described above, the two terminal members 63 . 64 of the intermediate heat exchanger 62 Embodiment 2 described above on the first header tank 3 be fixed so that the second flow channel 69 of the first connection member 64 with the refrigerant outlet 27 of the first collection tank 3 communicated. In an integrated heat-exchanging device, which is composed of an intermediate heat exchanger and a gas cooler configured such that a first header tank has a plurality of header sections arranged along its longitudinal direction, a second header tank has a header section (E) which is in the number one is smaller than the header tank portions of the first header tank, a header tank section at one end of the first header tank serves as a refrigerant inlet header section with a refrigerant inlet header section with a refrigerant inlet port and a header section at the other end of the first header tank as a refrigerant outlet header section is used, which has a refrigerant outlet, the two connection members of the intermediate heat exchanger can be attached to the first header so that de The second flow channel of the first connection member communicates with the refrigerant outlet of the first header tank.

In the above-described embodiment 2, the first terminal member 34 of the intermediate heat exchanger 2 Embodiment 1 described above on the first header tank 51 be attached so that the second flow channel 42 with the refrigerant outlet 57 of the first collection tank 51 communicates, and the second connection member 35 may be at the second header tank 52 be fixed. In an integrated Wärmetauschein direction, which consists of an intermediate heat exchanger and a gas cooler, which is configured so that a first header tank has a plurality of header sections, which are arranged in its longitudinal direction, a second header tank, the collecting container sections, which in number smaller as the header sections of the first header tank, a header section at one end of the second header tank serves as a refrigerant inlet header section having a refrigerant inlet and a header section at the other end of the first header tank serves as a refrigerant outlet header tank Thus, the first connection member of the intermediate heat exchanger may be fixed to the first header tank of the gas cooler and the second connection member may be attached to the second header tank of the Gas cooler to be fixed, so the second flow channel of the first connection member communicates with the refrigerant outlet of the first header tank.

Although CO _{2 is used} as a supercritical refrigerating cycle supercritical refrigerant in the above-described two embodiments, the refrigerant is not limited to this, but ethylene, ethane, nitrogen oxide or the like may alternatively be used.

The 13 to 19 show modified embodiments of a heat exchange tube for use in the gas cooler described above 1 and evaporator 50 the above-described two integrated heat exchange devices. In the following descriptions regarding the modified embodiments of the heat exchange tube, the upper, lower, left and right sides of FIG 13 to 19 as "top", "bottom", "left" and "right" respectively.

A heat exchange tube 160 , which in the 13 and 14 shown comprises two opposing flat upper and lower walls 161 . 162 (a pair of flat walls); left and right side walls 163 . 164 extending over left and right ends of the upper and lower walls, respectively 161 . 162 extend; and a plurality of reinforcing walls 165 at predetermined intervals between the left and right sidewalls 163 . 164 are provided and in the longitudinal direction and between the upper and lower walls 161 . 162 extend. Due to this structure has the heat exchange tube 160 a plurality of refrigerant channels 166 which are arranged in its width direction. The reinforcement walls 165 serve as partitions between adjacent refrigerant channels 166 , The width of each refrigerant channel 166 remains along the entire height of the refrigerant channel 166 unchanged.

The left side wall 163 has a double structure and has an elongated projection forming an outer side wall 167 integral with the left-hand end of the upper wall 161 is formed in a downwardly projecting state and along the entire height of the heat exchange tube 160 extends; an elongated projection forming an inner side wall 168 which is within the elongated protrusion forming the outer sidewall 167 lies and integral with the upper wall 161 is formed in a downwardly projecting state; and an elongated projection forming an inner side wall 169 integral with the left-hand end of the lower wall 162 is formed in an upwardly projecting state. The elongated projection forming the outer side wall 167 is at the two the inner side wall forming elongated projections 168 . 169 and the lower wall 162 soldered while a lower end portion of it with the left side edge portion of the underside of the lower wall 163 engaged. The two inner side wall forming elongated projections 168 . 169 are soldered together while they abut each other. A right side wall 164 is integral with the upper and lower walls 161 . 162 educated. A lead 169a is at the upper end surface of the inner sidewall forming protrusion 169 the lower wall 162 formed and extends in the longitudinal direction of the inner side wall forming projection 169 along its entire length. A groove 168a is at the lower Endflä surface of the inner side wall forming elongated projection 168 the upper wall 161 formed and extending in the longitudinal direction of the inner side wall forming the elongated projection 168 along its entire length. The lead 169a is in the groove 168a pressed.

Each of the reinforcement walls 165 is formed so that a reinforcing wall forming elongated projection 170 which is integral with the upper wall 161 is formed in a downwardly projecting state, and a reinforcing wall forming elongated projection 171 which is integral with the lower wall 162 is formed in an upstanding state, are soldered together while they abut each other.

The heat exchange tube 160 is using a pipe-forming metal sheet 175 made as it is in the 15 (a) is shown. The tube-forming metal sheet 175 is made by performing a rolling process on an aluminum brazing sheet having a brazing material layer on its opposite sides. The pipe-forming sheet metal 175 has a flat, the upper wall forming area 176 (flat wall forming area); a region forming the lower wall 177 (flat wall forming area); a connection area 178 , which is the area forming the upper wall 176 and the area forming the lower wall 177 connects and is suitable, the right side wall 164 to build; the inner side wall forming elongated projections 168 . 169 which integrally at the lateral ends of the upper wall forming and the lower wall forming areas 176 . 177 opposite to the connection area 178 are formed in an upwardly projecting state and which are geeigent, an inner region of the side wall 163 to build; a longitudinal projection, which is the outer side wall forming area 179 which is in the left-right direction (to the right) of the seitli Chen end (right-hand end) of the upper wall forming area 176 opposite to the connection area 178 extends; and a plurality of reinforcing wall forming elongated protrusions 170 . 171 which integrally on the upper wall forming and the lower wall forming area 176 . 177 are formed in an upwardly projecting state and arranged at predetermined intervals in the left-right direction. The reinforcing wall forming elongated projections 170 of the upper wall forming area 176 and the reinforcing wall forming elongated protrusions 171 of the lower wall forming area 177 are symmetrical with respect to the center line of the width direction of the pipe-forming metal sheet 175 arranged. The lead 169a becomes on the upper end surface of the inner side wall forming elongated projection 169 of the lower wall forming area 177 trained, and the groove 168a becomes on the upper end surface of this inner side wall forming elongated projection 168 of the upper wall forming area 176 educated. The two inner side wall forming elongated projections 168 . 169 and all the elongate projections forming the reinforcement walls 170 . 171 have the same height. The vertical thickness of the connection area 171 is greater than the thickness of the upper wall forming and the lower wall forming areas 175 . 176 , The upper end surface of the connection area 178 is substantially flush with the upper end surfaces of the inner side wall forming elongated projections 168 . 169 and the reinforcing walls forming elongated projections 170 . 171 ,

The elongated projections forming the inner side wall 168 . 169 and the reinforcing walls forming elongated projections 170 . 171 are integrally formed by a rolling process performed on the aluminum brazing sheet whose opposite sides are coated with a brazing material. Thus, a soldering material layer (not shown) is formed on the opposite side surfaces and the end-side end surfaces of the elongated projections forming the inner side wall 168 . 169 , at which the reinforcing walls forming elongated projections 170 . 171 and on the opposite vertical surfaces of the upper wall forming and the lower wall forming areas 175 . 176 educated. In this case, the brazing material layers become the end-side end surfaces of the elongated projections forming the inner side wall 168 . 169 and the reinforcing walls forming elongated projections 170 . 171 larger in thickness than the brazing material layer at other portions of the tube-forming metal sheet 175 ,

The tube-forming metal sheet 175 is at left and right side edges of the connection area 178 Gradually folded by a roll forming process (see 15 (b) ) until a hairpin shape is adopted. The elongated projections forming the inner side wall 168 . 169 are made to come into contact with each other; the elongate projections forming the reinforcement walls 170 . 171 are made to come into contact with each other; and the lead 169a is brought into the groove 168a to be pressed in.

Next is the area 179 which forms the elongated protrusion forming the outer side wall, along the outer surfaces of the elongated protrusions forming the inner side walls 168 . 169 folded and a frontal end portion of it is deformed so that it forms with the lower wall forming area 177 engages, creating a folded element 168 is obtained (see 15 (c) ).

Subsequently, the folded element 180 heated to a predetermined temperature to the front end portions of the inner side wall forming elongated projections 168 . 169 to solder; around the front end portions of the reinforcing walls forming elongate projections 170 . 171 to solder; and around the area 179 which forms the elongated projection forming the outer side wall, to the elongate projections forming the inner side wall 168 . 169 and at the lower wall forming area 177 to solder. This is how the heat exchange tube becomes 160 produced. The heat exchange tubes 160 are made in the course of manufacturing the integrated heat exchange device.

In the case of the heat exchange tube 185 which is in the 16 shown is a lead 186 which extends along the entire length of it, and a groove 187 which extends along the entire length of it, alternately on the end faces of all the reinforcing walls forming elongated projections 170 the upper wall 161 educated. A groove 168 , in which the corresponding projection 160 of the reinforcing walls forming elongated projection 170 the upper wall 161 is used, and a lead 168 which is in the corresponding groove 187 of the reinforcing wall forming elongated projection 170 the upper wall 161 is to be used are alternately on the end faces of all the reinforcing wall forming elongated projections 171 the lower wall 172 formed by him along the entire length. Other structural features are similar to those of the heat exchange tube 160 , which in the 13 and 14 is shown. The heat exchange tube 185 is a way represents, similar to that for the heat exchange tube 160 which is in the 13 and 14 is shown.

In a heat exchange tube 190 , which in the 17 and 18 is shown are the reinforcing wall 165 , which is formed so that the reinforcement wall forming an elongated projection 161 which is integral with the upper wall 161 and formed in a downwardly projecting state, on the lower wall 162 is soldered, and the reinforcing wall 165 , which is formed so that the reinforcement wall forming an elongated projection 192 which is integral with the lower wall 162 and formed in an upwardly projecting state, on the upper wall 161 is soldered, provided alternately in the left-right direction; the upper and lower walls 161 . 162 have projections 193 which extend along their entire length and are formed integrally at portions thereof which are adjacent to the respective elongate projections forming the reinforcing walls 192 . 191 come into contact; are depressions 194 at the respective end faces of the projections 193 formed to the corresponding tip end portions of the reinforcing walls forming elongated projections 191 . 192 to allow to be employed in them; and the tip end portions of the elongate protrusions forming the reinforcing walls 191 . 192 at the corresponding projections 193 be soldered while they are in the wells 194 the projections 193 are used. The thickness of the projection 193 is measured in the left-right direction slightly larger than that of the reinforcing walls forming elongated protrusions 191 . 192 , Other structural features of the heat exchange tube 190 are similar to those of the heat exchange tube 160 , which in the 13 and 14 is shown.

The heat exchange tube 190 is using a pipe-forming metal sheet 195 made as it is in the 19 (a) is shown. The tube-forming metal sheet 195 is made by performing a rolling process on an aluminum brazing sheet having a brazing material layer on its opposite sides. The tube-forming metal sheet 195 includes a plurality of reinforcing wall-forming elongated protrusions 191 . 192 integral with the upper wall forming and the lower wall forming areas 176 . 177 are formed in an upwardly projecting state and arranged at predetermined intervals in the left-right direction. The reinforcing walls forming elongated projections 191 of the upper wall forming area 176 and the reinforcing wall forming elongated protrusions 192 of the lower wall forming area 177 are asymmetrical with respect to the center line of the width direction of the pipe-forming metal sheet 195 arranged. The reinforcing walls forming elongated projections 191 . 192 have the same height, which is about twice the height of the inner Seitenwan forming forming elongated projections 168 . 169 , The projections 193 are integral in such a way that they extend along the entire length of the upper wall forming and the lower wall forming areas 176 . 177 extend, at those areas of the upper wall forming and the lower wall forming areas 176 . 177 formed, where the corresponding the reinforcing walls forming elongated projections 192 . 191 the forming the lower wall and the upper wall forming areas 177 . 17b come into contact. The wells 194 are at the corresponding tip end surfaces of the projections 193a formed to the corresponding tip end portions of the reinforcing walls forming elongated projections 192 . 191 to allow to intervene in them. Other structural features of the tube-forming metal sheet 195 are similar to those of the tube-forming metal sheet 175 which is in the 15 is shown.

The tube-forming metal sheet 195 is at left and right side edges of the connection area 178 Gradually folded by a roll forming process (see 19 (b) ) until a hairpin shape is adopted. The elongated projections forming the inner side wall 168 . 169 are brought to bump into each other, and the lead 169a is brought into the groove 168a to be pressed in. Also, the tip end portions of the reinforcing walls forming elongated projections 191 of the upper wall forming area 176 brought into the corresponding grooves 194 the projections 193 of the lower wall forming area 177 to engage, and the pointed end portions of the reinforcing walls forming elongated projections 192 of the lower wall forming area 177 are brought to the corresponding grooves 194 the projections 193 of the upper wall forming area 176 intervene.

Next is the area 179 which forms the elongated projection for forming the outer side wall, along the outer surface of the inner side wall forming elongated projections 168 . 169 folded and a pointed end portion of it is deformed to the area forming the lower wall 177 to engage, creating a folded element 196 is obtained (see 19 (c) ).

Then the folded element will open a predetermined temperature heated to the tip end portions of the inner side wall forming elongated projections 168 . 169 to solder; and the front end portions of the reinforcing walls forming elongated projections 191 . 192 at the corresponding projections 193 to solder; and around the area 179 which forms the elongated projection forming the outer side wall, to the elongate projections forming the inner side wall 168 . 169 and at the lower wall forming area 177 to solder. This is how the heat exchange tube becomes 190 produced. The heat exchange tubes 190 are made in the course of manufacturing the integrated heat exchange device.

INDUSTRIAL APPLICABILITY

The integrated heat exchange device according to the present invention is preferably used as a gas cooler and an intermediate heat exchanger of a supercritical refrigeration cycle using a supercritical refrigerant such as CO ₂ .

SUMMARY

An integrated heat exchange device consists of a gas cooler 1 and an intermediate heat exchanger 2 , The gas cooler includes two header tanks 3 . 4 and a plurality of heat exchange tubes 5 , A refrigerant outlet 27 is at the first collection tank 3 educated. The intermediate heat exchanger 2 includes an outer tube 31 and an inner tube 32 and has two refrigerant channels 30 . 40 and connecting links 34 . 35 at opposite ends of the tubes 31 . 32 are fixed and first flow channels 41 . 45 have that with the first refrigerant channel 30 and second flow channels 42 . 46 , which with the second refrigerant channel 40 communicate, has. Both connection links 34 . 35 of the intermediate heat exchanger 2 are at the collection tank 3 . 4 of the gas cooler 1 attached. The second flow channel 42 of the connection element 34 of the intermediate heat exchanger 2 communicates with the refrigerant outlet 27 of the gas cooler 1 , This integrated heat exchange device can simplify the route of the piping and make the installation space relatively small.

Claims (16)

An integrated heat exchanger device with: one first heat exchanger, which first and second header tanks spaced apart are arranged from each other, and a plurality of heat exchange tubes, which passes between the two reservoir tanks at intervals the longitudinal direction the collection tank are arranged and each have opposite end portions, which are attached to the respective header tanks, wherein a refrigerant outlet at the first header tank is trained; and a second heat exchanger, which a Heat exchange section with first and second refrigerant channels and Terminal members provided at the opposite ends of the heat exchange section are and in each case a first flow channel for the production a communication between the first refrigerant passage and the outside of the second heat exchanger and a second flow channel for establishing communication between the second refrigerant passage and the outside have the second heat exchanger, includes wherein both connection members of the second heat exchanger at the first heat exchanger are fixed and the second flow channel from a connecting member of the second heat exchanger with the refrigerant outlet of the first header tank of the first collection container communicated. An integrated heat exchange device according to claim 1, wherein a connection member of the second heat exchanger at the first header tank of the first heat exchanger is fixed, the other connection member of the second heat exchanger at the second header tank of the first heat exchanger is fixed, and the second flow channel from a connection member to the refrigerant outlet of the first header tank of the first heat exchanger communicated. An integrated heat exchange device according to claim 2, wherein the first header tank of the first heat exchanger a plurality of sump portions has arranged in its longitudinal direction are; the second reservoir tank of the first heat exchanger a sump section (Sump portions) has, in the number one less than the sump sections of the first collection container is; a sump section at one end of the first header tank serves as a refrigerant inlet header section, the one refrigerant inlet having; and a sump section at the other end of the first header tank as a refrigerant outlet header section serves, which has a refrigerant outlet wherein the refrigerant, which of the refrigerant inlet into the refrigerant inlet header section streamed is through the heat exchange tubes and the sump sections enters and exits the refrigerant outlet of the refrigerant outlet header section dissipated becomes. An integrated heat exchange device according to claim 1, wherein both connection members of the second heat exchanger to the first Sammelbehäl Tertank of the first heat exchanger are fixed and the second flow channel of a connecting member communicates with the refrigerant outlet of the first header tank of the first heat exchanger. An integrated heat exchange device according to claim 4, wherein the first header tank of the first heat exchanger a plurality of sump portions has arranged in its longitudinal direction are; the second reservoir tank of the first heat exchanger collecting sections which has along its longitudinal direction are arranged and in number with the number of sump sections match the first header tank; a sump section at one end of the second header tank as a refrigerant inlet header section serves, which has a refrigerant inlet Has; and a sump section at the other end of the first header tank as a refrigerant outlet header section serves, which has a refrigerant outlet has, where a refrigerant, which of the refrigerant inlet in the refrigerant inlet collecting tank section streamed is through the heat exchange tubes and the sump sections flows and from the refrigerant outlet of the refrigerant outlet header section dissipated becomes. An integrated heat exchange device according to claim 1, wherein each collecting tank of the first heat exchanger is made by a collecting container forming plate, a pipe connecting plate and an intermediate plate which forms between the sump Plate and the pipe connection plate is arranged, stacked on each other and soldered become; a vaulted one Area at the collecting tank forming Plate is formed so that the arched area extends along the longitudinal direction extends from her and through her opening the intermediate plate is closed; a plurality of tube insertion openings in the pipe connecting plate in an area which is the arched area corresponds, is formed so that the tube insertion openings penetrate the pipe connection plate and along at intervals the longitudinal direction the pipe connecting plate are arranged; communication ports for establishing communication between the tube insertion holes of Pipe connection plate and the interior of the arched area of the sump forming plate in the intermediate plate are formed so that the communication openings penetrate the intermediate plate; a sump portion through an area the sump-forming plate with the arched one Area and areas of Rohrverbin tion plate and the intermediate area, which the arched one Corresponds to area, is formed; and the opposite end portions of the heat exchange tubes in the tube insertion holes the pipe connection plates from the two header tanks used and are soldered to the pipe connection plates. An integrated heat exchange device according to claim 6, wherein a cover wall is integral along each of the opposing ones Side edge portions of the pipe connection plate is provided to a Border between the bin-forming Plate and the intermediate plate over the entire length cover; and the Abdeckwandung on the opposite side surfaces of Header forming Plate and the intermediate plate is soldered. An integrated heat exchange device according to claim 7, wherein engaging portions which are integral with the outer surface of the sump Plate engage integrally at the end portions of the Abdeckwandungen are provided. An integrated heat exchange device according to claim 1, wherein the heat exchange section of the second heat exchanger an outer tube and an inner tube which is inside the outer tube with one in between formed gap is arranged, wherein the gap between the outer tube and the inner as the first refrigerant channel and the interior of the inner tube serves as the second refrigerant passage. An integrated heat exchange device according to claim 9, wherein ribs between the outer tube and the inner tube of the second heat exchanger are provided; the opposite projecting end portions of the inner tube project from the outer tube; a rib-free Area at least one end portion of each of the outwardly projecting Areas is provided; and the rib-free areas of the inner Pipe in end portions of the second flow channels of the corresponding connection members are used. An integrated heat exchange device according to claim 10, wherein ribs are integrally formed on the outer peripheral surface of the inner tube at circumferential intervals are formed so that the ribs along the longitudinal direction extend the inner tube. An integrated heat exchange device according to claim 10, wherein the entirety of each of the outwardly projecting portions of the inner tube coming out of the outer tube project, which is rib-free area. A supercritical refrigeration cycle which includes a compressor, a gas cooler, an evaporator, a gas-liquid separator and egg NEN intermediate heat exchanger for carrying out a heat exchange between refrigerant emanating from the gas cooler, and refrigerant, which exits from the evaporator, and in which a supercritical refrigerant is used, wherein the gas cooler from the first heat exchanger of the integrated heat exchanger device according to one of claims 1 to 12 and the intermediate heat exchanger consists of the second heat exchanger of the integrated heat exchange device. A supercritical Refrigeration circuit according to claim 13, wherein low-pressure refrigerant, which flows from the evaporator, through the first refrigerant channel of the intermediate heat exchanger flows, and high pressure refrigerant coming out of the gas cooler flows through the second refrigerant channel of the intermediate heat exchanger flows. A supercritical Refrigeration circuit according to claim 14, wherein the supercritical refrigerant Carbon dioxide is. A vehicle in which a supercritical refrigeration cycle according to claim 14 is installed as a vehicle air conditioner.