DE112005002189T5 - Layered heat exchanger - Google Patents

Abstract

One layered heat exchanger with a plurality of flat, hollow elements, each of which flat, hollow elements two elongated in the vertical direction Metal plates whose peripheral edge areas are interconnected are a protruding refrigerant flow tube area, which is formed between the two metal plates, and a projecting collecting tank forming Area that is opposite lying ends of the refrigerant flow tube area attached is, wherein the sump forming areas of adjacent flat, hollow elements in a layered state are interconnected, gaps between the refrigerant flow tube areas of adjacent flat, hollow elements as air passage gaps serve the sump-forming Areas of the flat, hollow elements include a refrigerant inlet header section that has a Refrigerant inlet comprising, a refrigerant outlet collecting section, which a refrigerant outlet and a plurality of intermediate header sections at least one of the sump portions as a refrigerant flow dividing Header section serves, which a refrigerant channel having a refrigerant flow in the longitudinal direction allowed by him and one with respect to the refrigerant flow direction downstream End has which is closed and which causes refrigerant into a plurality ...

Description

CROSS REFERENCE RELATED APPLICATIONS

These Application is a registration filed under 35 U.S.C. Section 111 (a) claiming the advantage according to 35 U.S.C. Section 119 (e) (1) of the filing date of Provisional Application No 60 / 609,831, on September 15, 2004 according to 35 U.S.C. Section 111 (b) was filed, was filed.

TECHNICAL AREA

The The present invention relates to a layered heat exchanger, in particular a stratified heat exchanger serving as an evaporator Vehicle air conditioning, which is a refrigerant circuit Board of a vehicle is being used.

Herein and in the appended claims, the upper, lower, left and right sides of the 1 . 3 and 11 labeled "top", "bottom", "left" and "right" respectively. The downstream side of the airflow (into the 1 and 11 represented by the arrow X) is referred to as the "front side" and the opposite side as the "back side".

STATE OF TECHNOLOGY

One layered heat exchanger, in the conventional way widely used as an evaporator of a vehicle air conditioner includes a plurality of flat, hollow elements (see, for example Japanese Laid-Open Patent Application (kokai) No. 2003-14392). Each of the flat, hollow elements comprises two elongated ones in the vertical direction Metal plates whose peripheral edge areas are interconnected are. Two vertically extending, protruding Refrigerant flow tube portions are formed between the two metal plates, being separated from each other the air flow direction are complained of. A projecting sump forming area is with each of the upper and lower ends of the two refrigerant flow pipe portions connected. The sump forming Areas of adjacent flat, hollow elements are in a layered Condition arranged and interconnected. Column between the Refrigerant flow tube portions of adjacent flat, hollow elements serve as air passage gaps. The sump-forming Portions of the flat, hollow elements form a refrigerant inlet header section, which has a Refrigerant inlet has, a refrigerant outlet header section, the one refrigerant outlet has, and a plurality of intermediate container sections.

The layered heat exchanger described in the publication comprises a refrigerant header section; a refrigerant outlet header section located upstream of the refrigerant inlet header section with respect to the air flow direction; a first intermediate header section disposed below the refrigerant inlet header section; a second intermediate header section disposed in tandem with the first intermediate header section; a third intermediate header section disposed above the second intermediate header section and in tandem with the refrigerant inlet header section; a fourth intermediate header section disposed upstream of the third intermediate header section with respect to the air flow direction and in tandem with the refrigerant outlet header section; a fifth intermediate header section disposed below the fourth intermediate header section; and a sixth intermediate header section disposed below the refrigerant outlet header section and in tandem with the fifth intermediate header section. The refrigerant flow tube portions of the flat hollow members communicate between the refrigerant inlet header section and the first intermediate header section, communication between the second intermediate header section and the third intermediate header section, communication between the fourth intermediate header tank And the fifth intermediate header section, and communication between the sixth intermediate header section and the refrigerant outlet header section. The third intermediate header section and the fourth intermediate header section communicate with each other via communication channels formed in the flat hollow members. The refrigerant inlet header section, the second intermediate header section, and the sixth intermediate header section each serve as a refrigerant flow dividing part of the header section having a refrigerant passage that allows refrigerant flow in its longitudinal direction and a downstream end with respect to the refrigerant flow direction which is closed, and which causes refrigerant to flow divided into a plurality of refrigerant flow pipe portions. The refrigerant outlet header section, the first intermediate header section, and the fifth intermediate section The header tank section each serves as a refrigerant flow converging header section that has a refrigerant passage that allows a refrigerant flow in its longitudinal direction and has a downstream end with respect to the refrigerant flow direction that is open, and that causes refrigerant to flow out of one A plurality of refrigerant flow tube portions flows, is converges. The refrigerant passage of the refrigerant inlet header section communicates with a refrigerant inlet; the refrigerant passage of the refrigerant outlet header section communicates with a refrigerant outlet; the refrigerant passage of the first intermediate header section communicates with that of the second intermediate header section; and the refrigerant passage of the fifth intermediate header section communicates with that of the sixth intermediate header section.

One layered heat exchanger this species is for a divided evenly Refrigerant flow in terms of the refrigerant flow into the refrigerant flow tube areas, which is a connection between the refrigerant inlet header section and the first Intermediate header section produce, the refrigerant flow into the refrigerant flow pipe sections, which connects between the second intermediate header section and the third intermediate header section, the refrigerant flow into the refrigerant flow tube areas, which a communication between the fourth intermediate header section and the fifth intermediate header section and the refrigerant flow into the refrigerant flow pipe sections, the one connection between the sixth intermediate header section and the refrigerant outlet header section, educated. In the layered described in the above publication heat exchangers is to refrigerants, which in the refrigerant channel of the second intermediate sump section from that of the first intermediate header section flows over the entire second intermediate header section distribute and refrigerant, which in the refrigerant channel of the sixth intermediate sump section from the fifth Intermediate header section flows in, over the to distribute the entire sixth intermediate collection container, a flat plate, which has a refrigerant passage opening between the first intermediate sump section and the second intermediate header section and between the fifth Intermediate header section and the sixth intermediate header section; and a guide is at the downstream Surface of each of the flat plates with respect to the refrigerant flow direction provided to refrigerant which through the relevant refrigerant passage openings in the second intermediate header section and in the sixth Intermediate header section to distribute.

In However, an evaporator of a vehicle air conditioning system, the air velocity distribution along the left-right direction at the upstream Side in relation to the air flow direction, i.e. at the back, in dependence from the installation procedure of the evaporator and the mold of the housing of the evaporator become uneven. In this case, an evaporator of a vehicle air conditioner, which implemented by a layered heat exchanger and a uniformly distributed refrigerant flow in all refrigerant flow tube areas allowed to cause a problem that the air distribution of discharged air, i. the air distribution of the air passing through the vaporizer is stepped, along the left-right direction become uneven can. In other words, the temperature of the skipped air in an area where the air speed at the back is high becomes, become relatively high and the temperature of the omitted Air in an area where the air velocity at the back low, relatively low. Furthermore, in an area, where the air velocity at the back becomes low condensed Water on the surfaces the refrigerant flow tube areas and the ribs freeze.

A The object of the present invention is to solve the problems mentioned above to solve and a layered heat exchanger to create, which, for example, if he as an evaporator a vehicle air conditioning system is used, a uniform air distribution which can ensure exited air, even if the air velocity distribution at the upstream Side with respect to the air flow direction becomes uneven.

EPIPHANY THE INVENTION

• 1) Ein geschichteter Wärmetauscher mit einer Mehrzahl von flachen, hohlen Elementen, wobei jedes der flachen, hohlen Elemente zwei in vertikaler Richtung längliche Metallplatten, deren Umfangskantenbereiche miteinander verbunden sind, einen vorstehenden Kältemittel-Strömungsrohrbereich, der zwischen den beiden Metallplatten ausgebildet ist, und einen vorstehenden Sammelbehälterbildenden Bereich, der an gegenüber liegenden Enden des Kältemittel-Strömungsrohrbereiches angebracht ist, aufweist, wobei die Sammelbehälter-bildenden Bereiche von benachbarten flachen, hohlen Elementen in einem geschichteten Zustand miteinander verbunden sind, Spalte zwischen den Kältemittel-Strömungsrohrbereichen von benachbarten flachen, hohlen Elementen als Luftdurchtrittsspalte dienen, die Sammelbehälter-bildenden Bereiche der flachen, hohlen Elemente einen Kältemittel-Einlass-Sammelbehälter-Abschnitt, der einen Kältemittel-Einlass aufweist, einen Kältemittel-Auslass-Sammelbehählter-Abschnitt, welcher einen Kältemittel-Auslass aufweist, und eine Mehrzahl von Zwischensammelbehälter-Abschnitten aufweisen, wobei wenigstens einer von den Sammelbehälter-Abschnitten als ein Kältemittelstrom-unterteilender Sammelbehälter-Abschnitt dient, welcher einen Kältemittelkanal aufweist, der einen Kältemittelstrom in der Längsrichtung von ihm erlaubt und ein in Bezug auf die Kältemittel-Strömungsrichtung stromabwärtiges Ende hat, welches geschlossen ist, und welcher bewirkt, dass Kältemittel in eine Mehrzahl von Kältemittel-Strömungsrohrbereichen unterteilt strömt, wobei Kältemittel in den Kältemittel-Einlass-Sammelbehälter-Abschnitt von dem Kältemittel-Einlass her einströmt, durch die Kältemittel-Strömungsrohr-Abschnitte und durch die Zwischensammelbehälter-Abschnitte strömt, in den Kältemittel-Auslass-Sammelbehälter-Abschnitt strömt und aus dem Kältemittel-Auslass strömt, wobei ein Widerstandsbereich in wenigstens einem der Kältemittelstrom-unterteilenden Sammelbehälter-Abschnitte vorgesehen ist, um dem Kältemittel, das durch den Kältemittelkanal, welcher sich in einer Längsrichtung des Kältemittelstromunterteilenden Sammelbehälter-Abschnitts erstreckt, einen Widerstand entgegenzusetzen.
• 2) Ein geschichteter Wärmetauscher nach Abschnitt 1, worin der Widerstandsbereich eine Widerstandsöffnung aufweist, die in einem Widerstandsplattenbereich ausgebildet ist, welcher innerhalb des den Kältemittelstromunterteilenden Sammelbehälterabschnittes in einer Weise vorgesehen ist, um dessen Kältemittelkanal zu blockieren.
• 3) Ein geschichteter Wärmetauscher nach Abschnitt 2, worin der Widerstandsplattenbereich ein Bereich einer flachen Platte aus Metall ist, die zwischen zwei Metallplatten in Sandwich-Anordnung angeordnet und daran angebracht ist, welche verwendet werden, um das flache, hohle Element zu bilden, wobei der Bereich der flachen Platte innerhalb des Kältemittelstrom-unterteilenden Sammelbehälterabschnitts vorgesehen ist; und wobei in einem Bereich der flachen Platte, der in einem anderen Sammelbehälterabschnitt mit dem Kältemittelkanal vorhanden ist, eine Kältemittelkanalöffnung ausgebildet ist und eine Querschnittsfläche hat, die gleich dem Kältemittelkanal ist.
• 4) Ein geschichteter Wärmetauscher nach Abschnitt 2 oder 3, worin eine Mehrzahl von widerstandsplattenbereichen innerhalb von wenigstens einem Kältemittelstromunterteilenden Sammelbehälterabschnitt vorgesehen ist und die Widerstandsöffnung in jeder der Widerstandsplattenbereiche ausgebildet ist.
• 5) Ein geschichteter Wärmetauscher nach Abschnitt 4, worin die Widerstandsöffnungen mit unterschiedlichen Größen gemischt vorgesehen sind.
• 6) Ein geschichteter Wärmetauscher nach Abschnitt 4, worin die Widerstandsöffnungen in unterschiedlichen vertikalen Positionen innerhalb der entsprechenden Kältemittelkanäle gemischt vorhanden sind.
• 7) Ein geschichteter Wärmetauscher nach Abschnitt 2, worin wenigstens ein Widerstandsplattenbereich innerhalb von jedem von einer Mehrzahl von Kältemittelstromunterteilenden Sammelbehälterabschnitten vorgesehen ist und die Widerstandsöffnung in dem Widerstandsplattenbereich ausgebildet ist.
• 8) Ein geschichteter Wärmetauscher nach Abschnitt 7, worin die Widerstandsöffnungen von unterschiedlichen Größen gemischt vorhanden sind.
• 9) Ein geschichteter Wärmetauscher nach Abschnitt 7, worin die Widerstandsöffnungen in unterschiedlichen vertikalen Positionen innerhalb der entsprechenden Kältemittelkanäle gemischt vorhanden sind.
• 10) Ein geschichteter Wärmetauscher nach Abschnitt 2, worin die Größe der Widerstandsöffnungen 1/60 bis 1/10 der Querschnittsfläche des Kältemittelkanals des Kältemittelstrom-unterteilenden Sammelbehälterabschnitts ist.
• 11) Ein geschichteter Wärmetauscher nach Abschnitt 2, worin ein Führungsbereich an einer in Bezug auf die Kältemittelströmungsrichtung stromabwärtsseitigen Oberfläche des Widerstandsplattenbereiches vorgesehen ist, um Kältemittel, welches durch die Widerstandsöffnung getreten ist, in Richtung des Kältemittel-Strömungsrohrbereiches nahe des Widerstandsplattenbereiches zu führen.
• 12) Ein geschichteter Wärmetauscher nach Abschnitt 1, worin das flache, hohle Element zwei sich in vertikaler Richtung erstreckende Kältemittel-Strömungsrohrbereiche, die voneinander in einer Luftströmungsrichtung beabstan det sind, und zwei Sammelbehälter-bildende Bereiche, die jeweils an den oberen und unteren Endbereichen des flachen, hohlen Elements vorgesehen sind, aufweist, wobei die Sammelbehälter-bildenden Bereiche mit den entsprechenden oberen Enden der beiden Kältemittel-Strömungsrohrbereichen verbunden sind und voneinander in der Luftströmungsrichtung beabstandet sind, und die anderen beiden Sammelbehälter-bildenden Bereiche mit den entsprechenden unteren Enden der beiden Kältemittel-Strömungsrohrbereichen verbunden sind und voneinander in der Luftströmungsrichtung beabstandet sind.
• 13) Ein geschichteter Wärmetauscher nach Abschnitt 12 mit einem Kältemittel-Sammelbehälter-Abschnitt, einem Kältemittel-Auslass-Sammelbehälter-Abschnitt, der stromaufwärts von dem Kältemittel-Einlass-Sammelbehälter-Abschnitt in Bezug auf die Luftströmungsrichtung angeordnet ist, einem ersten Zwischensammelbehälter-Abschnitt, der unterhalb des Kältemittel-Einlass-Sammelbehälter-Abschnitts angeordnet ist, einem zweiten Zwischensammelbehälter-Abschnitt, der in Tandemanordnung mit dem ersten Zwischensammelbehälter-Abschnitt angeordnet ist, einem dritten Zwischensammelbehälter-Abschnitt, der oberhalb des zweiten Zwischensammelbehälter-Abschnitts in Tandemanordnung mit dem Kältemittel-Einlass-Sammelbehälter-Abschnitt angeordnet ist, einem vierten Zwischensammelbehälter-Abschnitt, der stromabwärts von dem dritten Zwischensammelbehälter-Abschnitt in Bezug auf die Luftströmungsrichtung und in Tandemanordnung mit dem Kältemittel- Auslass-Sammelbehälter-Abschnitt angeordnet ist, einem fünften Zwischensammelbehälter-Abschnitt, der unterhalb des vierten Zwischensammelbehälter-Abschnitts angeordnet ist, einem sechsten Zwischensammelbehälter-Abschnitt, der unterhalb des Kältemittel-Auslass-Sammelbehälter-Abschnitts und in Tandemanordnung mit dem fünften Zwischensammelbehälter-Abschnitt angeordnet ist, wobei der Kältemittel-Einlass-Sammelbehälter-Abschnitt, der erste Zwischensammelbehälter-Abschnitt, der zweite Zwischensammelbehälter-Abschnitt und der dritte Zwischensammelbehälter-Abschnitt jeweils Sammelbehälter-bildende Bereiche der flachen, hohlen Elemente, welche in Richtung einer stromabwärtigen Seite in Bezug auf die Luftströmungsrichtung angeordnet sind, aufweisen; der Kältemittel-Auslass-Sammelbehälter-Abschnitt, der vierte Zwischensammelbehälter-Abschnitt, der fünfte Zwischensammelbehälter-Abschnitt und der sechste Zwischensammelbehälter-Abschnitt jeweils die Sammelbehälter-bildenden Bereiche der flachen, hohlen Elemente, welche in Richtung einer stromabwärtigen Seite in Bezug auf die Luftströmungsrichtung liegen, aufweisen; die Kältemittel-Strömungsrohrbereiche der flachen, hohlen Elemente eine Kommunikation zwischen dem Kältemittel-Einlass-Sammelbehälter-Abschnitt und dem ersten Zwischensammelbehälter-Abschnitt, eine Kommunikation zwischen dem zweiten Zwischensammelbehälter-Abschnitt und dem dritten Zwischensammelbehälter-Abschnitt, eine Kommunikation zwischen dem vierten Zwischensammelbehälter-Abschnitt und dem fünften Zwischensammelbehälter-Abschnitt und eine Kommunikation zwischen dem sechsten Zwischensammelbehälter-Abschnitt und dem Kältemittel-Auslass-Sammelbehälter-Abschnitt herstellen; der dritte Zwischensammelbehälter-Abschnitt und der vierte Zwischensammelbehälter-Abschnitt miteinander über Kommunikationskanäle, welche in den flachen, hohlen Elementen ausgebildet sind, kommunizieren; der Kältemittel-Einlass-Sammelbehälter-Abschnitt, der zweite Zwischensammelbehälter-Abschnitt und der sechste Zwischensammelbehälter-Abschnitt jeweils als ein Kältemittelstrom-teilender Sammelbehälter-Abschnitt dienen, welcher einen Kältemittelkanal besitzt, der einen Kältemittelstrom in der Längsrichtung von ihm erlaubt und in Bezug auf die Kältemittelströmungsrichtung ein geschlossenes stromabwärtiges Ende aufweist und der bewirkt, dass Kältemittel unterteilt in eine Mehrzahl von Kältemittel-Strömungsrohrbereichen strömt; der Kältemittel-Auslass-Sammelbehälter-Abschnitt, der erste Zwischensammelbehälter-Abschnitt und der fünfte Zwischensammelbehälter-Abschnitt jeweils als ein Kältemittelstrom-zusammenführender Sammelbehälterabschnitt dienen, welcher einen Kältemittelkanal besitzt, der einen Kältemittelstrom in der Längsrichtung von ihm erlaubt und ein in Bezug auf die Kältemittelströmungsrichtung stromabwärtiges offenes Ende besitzt und bewirkt, dass Kältemittel, das aus einer Mehrzahl von Kältemittel-Strömungsrohrbereichen strömt, zusammengeführt wird; der Kältemittelkanal des Kältemittel-Einlass-Sammelbehälter-Abschnitts mit dem Kältemittel-Einlass kommuniziert, der Kältemittelkanal des Kältemittel-Auslass-Sammelbehälter-Abschnitts mit dem Kälte mittelauslass kommuniziert; der Kältemittelkanal des ersten Zwischensammelbehälter-Abschnitts mit dem des zweiten Zwischensammelbehälter-Abschnitts kommuniziert; und der Kältemittelkanal des fünften Zwischensammelbehälter-Abschnitts mit dem des sechsten Zwischensammelbehälter-Abschnitts kommuniziert.
• 14) Ein geschichteter Wärmetauscher nach Abschnitt 1, worin das flache, hohle Element einen haarnadelförmigen Kältemittel-Strömungsbereich, der zwei sich in vertikaler Richtung erstreckende, vorstehende lineare Bereiche, die voneinander in der Luftströmungsrichtung beabstandet sind, und einen vorstehenden Kommunikationsbereich zur Herstellung einer Kommunikation zwischen beiden vorstehenden Linearbereichen an deren oberen Enden aufweist, und zwei Sammelbehälter-bildende Bereiche, die an dem oberen Endbereich des flachen, hohlen Elements ausgebildet sind, aufweist, wobei die beiden Sammelbehälterbildenden Bereiche an entsprechenden gegenüber liegenden Enden des Kältemittel-Strömungsrohrbereiches angebracht und voneinander in der Luftströmungsrichtung beabstandet sind.
• 15) Ein geschichteter Wärmetauscher nach Abschnitt 14, mit einem Kältemittel-Einlass-Sammelbehälter-Abschnitt, einem Kältemittel-Auslass-Sammelbehälter-Abschnitt, der in Tandemanordnung mit dem Kältemittel-Einlass-Sammelbehälter-Abschnitt angeordnet vorgesehen ist, einem ersten Zwischensammelbehälter-Abschnitt, der in Bezug auf die Luftströmungsrichtung stromabwärts von dem Kältemittel-Einlass-Sammelbehälter-Abschnitt angeordnet ist, und einem zweiten Zwischensammelbehälter-Abschnitt, der in Bezug auf die Luftströmungsrichtung stromabwärts von dem Kältemittel-Auslass-Sammelbehälter-Abschnitt und in Tandemanordnung mit dem ersten Zwischensammelbehälter-Abschnitt angeordnet ist, wobei der Kältemittel-Einlass-Sammelbehälter-Abschnitt und der Kältemittel-Auslass-Sammelbehälter-Abschnitt jeweils die Sammelbehälterbildenden Bereiche, der flachen, hohlen Elemente, welche in Richtung einer stromabwärtigen Seite in Bezug auf die Luftströmungsrichtung liegen, aufweisen; der erste Zwischensammelbehälter-Abschnitt und der zweite Zwischensammelbehälter-Abschnitt jeweils die Sammelbehälterbildenden Bereiche der flachen, hohlen Elemente, welche in Richtung einer stromabwärtigen Seite in Bezug auf die Luftströmungsrichtung liegen, aufweisen; die Kältemittel-Strömungsrohrbereiche der flachen, hohlen Elemente eine Kommunikation zwischen dem Kältemittel-Einlass-Sammelbehälter-Abschnitt und dem ersten Zwischensammelbehälter-Abschnitt und eine Kommunikation zwischen dem zweiten Zwischensammelbehälter-Abschnitt und dem Kältemittel-Auslass-Sammelbehälter-Abschnitt herstellen; der Kältemittel-Einlass-Sammelbehälter-Abschnitt und der zweite Zwischensammelbehälter-Abschnitt jeweils als ein Kältemittelstrom-unterteilender Sammelbehälter-Abschnitt dienen, welcher einen Kältemittelkanal aufweist, der einen Kältemittelstrom in der Längsrichtung von ihm erlaubt und ein in Bezug auf die Kältemittel-Strömungsrichtung geschlossenes stromabwärtiges Ende aufweist und der bewirkt, dass ein Kältemittel unterteilt in eine Mehrzahl von Kältemittel-Strömungsrohrbereichen strömt; der Kältemittel-Auslass-Sammelbehälter-Abschnitt und der erste Zwischensammelbehälter-Abschnitt jeweils als ein Kältemittelstrom-zusammenführender Sammelbehälter-Abschnitt dienen, der einen Kältemittelkanal aufweist, der einen Kältemittelstrom in seiner Längsrichtung erlaubt und ein in Bezug auf die Kältemittel-Strömungsrichtung offenes stromabwärtiges Ende aufweist und bewirkt, dass Kältemittel, welches aus einer Mehrzahl von Kältemittel-Strömungsrohrbereichen strömt, zusammengeführt wird; der Kältemittelkanal des Kältemittel-Einlass-Sammelbehälter-Abschnitts mit dem Kältemittel-Einlass kommuniziert; der Kältemittelkanal des Kältemittel-Auslass-Sammelbehälter-Abschnitts mit dem Kältemittel-Auslass kommuniziert; und der Kältemittelkanal des ersten Zwischensammelbehälter-Abschnitts mit dem des zweiten Zwischensammelbehälter-Abschnitts kommuniziert.
• 16) Ein Kältekreislauf mit einem Kompressor, einem Kondensator und einem Verdampfer, wobei der Verdampfer einen geschichteten Wärmetauscher nach einem der Abschnitte 1 bis 15 aufweist.
• 17) Ein Fahrzeug, in dem ein Kältekreislauf nach Anspruch 6 als eine Fahrzeugklimaanlage installiert ist.

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

• 1) A laminated heat exchanger having a plurality of flat, hollow members, each of the flat hollow members comprising two vertically elongated metal plates whose peripheral edge portions are connected to each other, a protruding refrigerant flow tube portion formed between the two metal plates, and a second projecting header forming portion, which is attached to opposite ends of the refrigerant flow tube portion, has, wherein the sump forming areas of Benach disclosed are connected to one another in a layered state with shallow, hollow members, gaps between the refrigerant flow pipe portions of adjacent flat hollow members serve as air passing gaps, the sump forming portions of the flat hollow members form a refrigerant inlet header section which has a Refrigerant inlet, a refrigerant outlet-Sammelbehählter portion having a refrigerant outlet, and a plurality of intermediate header sections, wherein at least one of the sump portions serves as a refrigerant flow dividing the sump portion, which a A refrigerant passage which allows a refrigerant flow in the longitudinal direction thereof and has a downstream end with respect to the refrigerant flow direction, which is closed, and which causes refrigerant in a plurality of refrigerant flow pipe is divided, wherein refrigerant flows into the refrigerant inlet header section from the refrigerant inlet ago, flows through the refrigerant flow tube sections and through the intermediate header sections, flows into the refrigerant outlet header section and out the refrigerant outlet, wherein a resistance region is provided in at least one of the refrigerant flow dividing header sections to resist the refrigerant flowing through the refrigerant channel extending in a longitudinal direction of the refrigerant flow dividing the header section.
• 2) A laminated heat exchanger according to item 1, wherein the resistance region has a resistance opening formed in a resistance plate region provided inside the sump section of the refrigerant flow dividing section in a manner to block the refrigerant passage thereof.
• 3) A layered heat exchanger according to Section 2, wherein the resistance plate region is a region of a flat metal plate sandwiched and mounted between two metal plates which are used to form the flat hollow element, wherein the Area of the flat plate is provided inside the refrigerant flow dividing header section; and wherein a refrigerant passage opening is formed in a region of the flat plate provided with the refrigerant passage in another header portion, and has a cross-sectional area equal to the refrigerant passage.
• 4) A laminated heat exchanger according to any of the second to third aspect, wherein a plurality of resistance plate portions are provided within at least one refrigerant flow dividing end of the header portion, and the resistance opening is formed in each of the resistance plate portions.
• 5) A layered heat exchanger according to Section 4, wherein the resistance openings are provided mixed with different sizes.
• 6) A layered heat exchanger according to Section 4, wherein the resistance openings are mixed in different vertical positions within the respective refrigerant channels.
• 7) A laminated heat exchanger according to section 2, wherein at least one resistance plate portion is provided inside each of a plurality of refrigerant flow dividing header portions and the resistance opening is formed in the resistance plate portion.
• 8) A layered heat exchanger according to Section 7, wherein the resistance openings of different sizes are mixed.
• 9) A layered heat exchanger according to Section 7, wherein the resistance openings are mixed in different vertical positions within the respective refrigerant channels.
• 10) A laminated heat exchanger according to Section 2, wherein the size of the resistance openings is 1/60 to 1/10 of the cross-sectional area of the refrigerant passage of the refrigerant flow dividing header portion.
• 11) A laminated heat exchanger according to par. 2, wherein a guide portion is provided on a downstream side surface of the resistance plate portion with respect to the refrigerant flow direction to guide refrigerant which has passed through the resistance hole toward the refrigerant flow tube portion near the resistance plate portion.
• 12) A layered heat exchanger according to section 1, wherein the flat hollow member has two vertically extending refrigerant flow tube portions spaced apart from each other in an air flow direction, and two header forming portions respectively at the upper and lower end portions of the first shallow hollow member, wherein the sump forming portions are connected to the respective upper ends of the two refrigerant flow pipe portions and spaced from each other in the air flow direction, and the other two sump forming portions are connected to the respective lower ends of the two Refrigerant flow tube areas are connected and separated from each other in the air flow spaced apart.
• 13) A laminated heat exchanger of section 12 having a refrigerant header section, a refrigerant outlet header section located upstream of the refrigerant inlet header section with respect to the air flow direction, a first intermediate header section, is disposed below the refrigerant inlet header section, a second intermediate header section disposed in tandem with the first intermediate header section, a third intermediate header section disposed above the second intermediate header section in tandem with the refrigerant header section; An inlet header section is arranged, a fourth intermediate header section downstream of the third intermediate header section with respect to the air flow direction and arranged in tandem with the refrigerant outlet header section t, a fifth intermediate header section disposed below the fourth intermediate header section, a sixth intermediate header section disposed below the refrigerant outlet header section and in tandem with the fifth intermediate header section, wherein the refrigerant Inlet header section, the first intermediate header section, the second intermediate header section and the third intermediate header section each have header forming portions of the flat hollow members disposed toward a downstream side with respect to the air flow direction ; the refrigerant outlet header section, the fourth intermediate header section, the fifth intermediate header section, and the sixth intermediate header section each include the header forming areas of the flat hollow members that are toward a downstream side with respect to the air flow direction , exhibit; the refrigerant flow tube portions of the flat hollow members communicate between the refrigerant inlet header portion and the first intermediate header portion, communication between the second intermediate header portion and the third intermediate header portion, communication between the fourth intermediate header portion and the fifth intermediate header section and communication between the sixth intermediate header section and the refrigerant outlet header section; the third intermediate header section and the fourth intermediate header section communicate with each other via communication channels formed in the flat hollow members; the refrigerant inlet header section, the second intermediate header section, and the sixth intermediate header section each serve as a refrigerant flow dividing header section having a refrigerant passage that permits refrigerant flow in the longitudinal direction thereof and with respect to Refrigerant flow direction has a closed downstream end and causes the refrigerant flows divided into a plurality of refrigerant flow tube areas; the refrigerant outlet header section, the first intermediate header section, and the fifth intermediate header section each serve as a refrigerant flow merging header section having a refrigerant passage that allows refrigerant flow in the longitudinal direction thereof and one with respect to the refrigerant flow direction downstream open end has and causes refrigerant, which flows from a plurality of refrigerant flow tube areas, is merged; the refrigerant passage of the refrigerant inlet header section communicates with the refrigerant inlet, the refrigerant passage of the refrigerant outlet header section communicates with the refrigerant outlet; the refrigerant passage of the first intermediate header section communicates with that of the second intermediate header section; and the refrigerant passage of the fifth intermediate header section communicates with that of the sixth intermediate header section.
• 14) A layered heat exchanger according to clause 1, wherein the flat hollow member has a hairpin-shaped refrigerant flow area, the two vertically extending projecting linear portions spaced from each other in the air flow direction, and a projected communication portion for establishing communication between two projecting linear portions at the upper ends thereof, and two sump forming portions formed at the upper end portion of the flat hollow member, wherein the two sump forming portions are attached to respective opposite ends of the refrigerant flow tube portion and separated from each other in the Air flow direction are spaced.
• 15) A layered heat exchanger according to Section 14, with a refrigerant inlet header section, a refrigerant off a first header tank section disposed in tandem with the refrigerant inlet header section, a first header tank section disposed downstream of the refrigerant inlet header section with respect to the air flow direction, and a second header tank section The intermediate header section disposed downstream of the refrigerant outlet header section with respect to the air flow direction and arranged in tandem with the first intermediate header section, wherein the refrigerant inlet header section and the refrigerant outlet header section each of the header forming areas, the flat hollow members facing toward a downstream side with respect to the air flow direction; the first intermediate header section and the second intermediate header section each have the header forming portions of the flat hollow members facing toward a downstream side with respect to the air flow direction; the refrigerant flow tube portions of the flat hollow members establish communication between the refrigerant inlet header section and the first intermediate header section and communication between the second intermediate header section and the refrigerant outlet header section; each of the refrigerant inlet header section and the second intermediate header section serves as a refrigerant flow dividing header section having a refrigerant passage that allows refrigerant flow in the longitudinal direction thereof and a downstream closed one with respect to the refrigerant flow direction End and which causes a refrigerant flows divided into a plurality of refrigerant flow tube areas; the refrigerant outlet header section and the first intermediate header section each serve as a refrigerant flow merging header section having a refrigerant passage that allows a refrigerant flow in its longitudinal direction and has a downstream end open with respect to the refrigerant flow direction and cause refrigerant flowing from a plurality of refrigerant flow pipe portions to be merged; the refrigerant passage of the refrigerant inlet header section communicates with the refrigerant inlet; the refrigerant passage of the refrigerant outlet header section communicates with the refrigerant outlet; and the refrigerant passage of the first intermediate header section communicates with that of the second intermediate header section.
• 16) A refrigeration cycle with a compressor, a condenser and an evaporator, wherein the evaporator has a layered heat exchanger according to one of the sections 1 to 15.
• 17) A vehicle in which a refrigeration cycle according to claim 6 is installed as a vehicle air conditioner.

at the layered heat exchanger of section 1) is the resistance region in at least one the refrigerant flow dividing Header sections provided to the refrigerant, which through the flow channel of the refrigerant flow dividing end Header section, which is in the longitudinal direction extends, flows, oppose a resistance so that the amount of refrigerant, the behind the resistance area in the refrigerant flow-dividing header section flows, can be reduced. In the case where the layered heat exchanger is used as an evaporator of a vehicle air conditioning is even if the air velocity distribution on the upstream side with respect to the air flow direction becomes uneven and correspondingly the air velocity into an area which the downstream Side of the resistance area with respect to the refrigerant flow direction in the refrigerant flow dividing end Collection container section corresponds, becomes uneven an extreme drop in the temperature of the air passing through the Area is kicked, can be prevented. Thus, the temperature distribution of Exhausted air made evenly become. Furthermore, in the area where the air speed becomes low, a freezing of condensed water on the surfaces of the Refrigerant flow tube portions and the ribs are prevented.

Of the layered heat exchangers from section 2) allows the resistance range to be relatively simple train.

Of the layered heat exchangers of section 3) allows relatively easy in the resistance plate area the resistance opening train. Also, leakage of refrigerant from the flat, hollow element, which possesses the flat plate, reliably prevented become. Furthermore you can the metal plates used to make the flat, hollow Element with the flat plate to form, identical to those which are used to make other flat, hollow elements to form, so that the production costs are reduced.

The stratified heat exchanger after egg In the sections 4) to 9), the flow rate of the refrigerant flowing through the individual regions thereof can finely control according to the nonuniform air velocity distribution on the upstream side with respect to the air flow direction.

Of the layered heat exchangers from section 10), the flow velocity of the refrigerant, which is behind the resistance area in the refrigerant flow dividing ends Header section flows, reliable to reduce.

Of the layered heat exchangers from section 11) a uniformly distributed current of refrigerant into the refrigerant flow tube areas, which having a portion of the refrigerant flow dividing end Sammelbehäl ter section connected downstream from the resistance plate area. If the resistance plate area within the refrigerant flow dividing end Sump section provided is, decreases the speed of the refrigerant, which by the resistance opening of the resistance plate area, too. This leads to the Difficulty that refrigerant into the refrigerant flow tube area flows, which nearby the resistance plate area is provided. The presence of the management area however, the entry of refrigerant into the refrigerant flow tube area, which nearby the resistance plate area is located. As a result, a uniformity with respect to the divided refrigerant flow into the refrigerant flow tube areas, which ends with a portion of the refrigerant flow divider Header section connected downstream from the resistance plate area.

BEST TYPE FOR EXECUTION THE INVENTION

embodiments The present invention will be described below with reference to FIG the drawings will be described. The embodiments relate to a layered heat exchanger according to the present Invention used in an evaporator of a vehicle air conditioning system becomes.

In In the following description, the term "aluminum" includes besides pure aluminum as well Aluminum alloys.

Embodiment 1

The present embodiment is in the 1 to 10 shown. The 1 to 3 show the overall structure of an evaporator of Embodiment 1; the 4 to 9 show the construction of essential areas of the evaporator; and the 10 shows the flow of a refrigerant in the evaporator.

With reference to the 1 to 3 is the evaporator 1 configured to have a plurality of flat, hollow elements 2A . 2 B . 2C . 2D and 2E each having a vertically elongated rectangular shape, arranged in a layered state in the left-right direction and connected to each other with their widths extending in the front-to-rear direction (the air flow direction). The evaporator 1 includes a refrigerant inlet header section 3 extending in the left-right direction, a refrigerant outlet header section 4 at the rear (with respect to the air flow direction upstream) of the refrigerant inlet header section 3 is provided and extends in the direction from left to right; a first intermediate header section 5 located under the refrigerant inlet sump section 3 is arranged and extends in the direction from left to right; a second intermediate sump section 6 that is continuous with and to the left of the first intermediate header section 5 is provided and extends in the left-right direction; a third intermediate collection section 7 located above the second intermediate header section 6 and continuously with and to the left of the refrigerant inlet header section 3 is arranged and extends in the direction from left to right; a fourth intermediate sump section 8th Located at the back of the third intermediate bin section 7 and continuously with and to the left of the refrigerant outlet header section 4 is arranged and extends in the direction from left to right; a fifth intermediate header section 9 , which is below the fourth intermediate bin section 8th is provided and extends in the left-right direction; and a sixth intermediate header section 11 that is continuous with and to the right of the fifth intermediate header section 5 and below the refrigerant outlet header section 4 is provided (see the 10 ).

A refrigerant inlet 12 is at the right end of the refrigerant inlet header section 3 formed, and a refrigerant outlet 13 is at the right end of the refrigerant outlet header section 4 educated. A connection plate 14 Aluminum is at right end portions of the refrigerant inlet and refrigerant outlet header sections 3 and 4 appropriate. The connection plate 14 has a refrigerant inflow port 14a , which with the cold medium inlet 12 communicates, and a refrigerant outflow port 14b , which with the refrigerant outlet 13 communicates. A refrigerant inlet pipe (not shown) is connected to the refrigerant inflow port 14a the connection plate 14 and a refrigerant outflow pipe (not shown) is connected to the refrigerant outflow port 14b connected.

As it is in the 2 to 4 is shown, includes each of the flat, hollow elements 2A . 2 B . 2C . 2D and 2E two vertically extending rectangular aluminum plates 15A . 15B . 15C or 15D whose peripheral edge portions are soldered together. Each of the aluminum plates 15A . 15B . 15C and 15D is made of an aluminum brazing sheet having an aluminum braze layer on each of its opposite sides. Two vertically extending front and rear refrigerant flow tube areas 16 . 17 and projecting sump forming areas 18 . 19 are between the two aluminum plates 15A . 15B . 15C or 15D provided, in part, the flat, hollow element 2A . 2 B . 2C . 2D or 2E form. The projecting sump forming areas 18 and 19 are with respective upper and lower end portions of the refrigerant flow tube areas 16 and 17 connected. A wavy inner rib 21 made of aluminum is in each of the flat, hollow elements excluding the flat, hollow elements 2D and 2E ie in each of the flat, hollow elements 2A . 2 B and 2C arranged in such a way that they are above the front and back side refrigerant flow tube areas 16 and 17 extend. The wavy inner rib 21 is on the two aluminum plates 15A . 15B or 15C soldered. Two corrugated aluminum inner fins may be separated in the respective refrigerant flow tube areas 16 and 17 be arranged.

In the flat, hollow elements 2A . 2 B . 2C . 2D and 2E is the height of the sump-forming areas 18 and 19 in the left-right direction greater than that of the refrigerant flow tube areas 16 and 17 , The sump-forming areas 18 or 19 the adjacent, flat hollow elements 2A . 2 B . 2C . 2D or 2E are soldered together. The front upper and lower sump forming areas 18 the flat, hollow elements 2A . 2 B . 2C . 2D and 2E form the refrigerant inlet header section 3 and the first to third intermediate header sections 5 to 7 , Similarly, the back upper and lower sump forming areas 19 the refrigerant outlet header section 4 and the fourth to sixth intermediate header sections 8th to 11 ,

Gaps between the refrigerant flow tube areas 16 and between the refrigerant flow tube areas 17 the adjacent flat hollow elements 2A . 2 B . 2C . 2D and 2E serve as air passage gaps. Wavy outer ribs 22 made of aluminum are arranged in the corresponding air passage columns and on the corresponding flat, hollow elements 2A . 2 B . 2C . 2D and 2E soldered. The refrigerant flow tube areas 16 and 17 and the outer ribs 22 form a heat exchange core section.

The 5 shows the construction of the first flat, hollow element 2A which is one of the flat, hollow members used to hold the refrigerant inlet header section 3 , the refrigerant outlet header section 4 , the first intermediate storage section 5 and the sixth intermediate header section 11 to form, with the flat, hollow elements 2C located at the left and right ends, the flat, hollow element 2D which is located at a central position with respect to the left-right direction, and the flat, hollow member 2E which is arranged at a predetermined distance away from the right end are excluded. As it is in the 5 is shown includes the aluminum plate 15A at the right side, which is used to partially the first, flat hollow element 2A to form two vertically extending, right-projecting, front-side and back-tube-forming projecting portions 23 and four rightward projecting sump forming protruding areas 24 at the respective upper and lower ends of the pipe portion forming protruding portions 23 are connected and have a protrusion height which is greater than that of the tubular region-forming protruding portions 23 is. The top wall of each of the sump forming protruding areas 24 is punched out to thereby a through hole 25 to build. The aluminum plate 15A at the left side, which is used to partially the first, flat hollow element 2A to form is a reflection of the aluminum plate 15A on the right side, and like areas are designated by like reference numerals. The two aluminum plates 15A are assembled so that the openings of the tube portion forming and sump forming protruding portions 23 and 24 lie opposite each other, with the inner rib 21 sandwiched therebetween and then connected by a soldering operation. This is how the first flat, hollow element becomes 2A educated. The sump-forming areas 18 and 19 the two adjacent first flat, hollow elements 2A are each interconnected in a communicating manner so that some size-reduced end portions of the sump bil denden prominent areas 24 from a first flat, hollow element 2A in the corresponding through holes 25 the sump forming protruding areas 24 the other first flat, hollow element 2A be pressed and soldered.

The 6 shows the construction of the second, flat hollow element 2 B which is one of the flat hollow elements used to make up the second intermediate sump section 6 , the third intermediate storage section 7 , the fourth intermediate storage section 8th and the fifth intermediate header section 9 with the exception of the flat, hollow element 2C located at the left end and the flat, hollow element 2D formed at a central position with respect to the left-right direction. As it is in the 6 is an outwardly projecting communication channel forming protruding area 26 on the right aluminum plate 15B the second, flat hollow element 2 B between the two upper header forming protruding areas 24 designed so that its height is slightly smaller than that of the sump forming protruding area 24 is. Thus, the two header forming protruding areas communicate 24 with each other via the communication channel forming protruding area 26 , The left aluminum plate 15B the second, hollow element 2 B is a reflection of the right aluminum plate 15B , and like areas are designated by like reference numerals. The communication channel-forming protruding areas 26 the two aluminum plates 15B form a prominent communication channel 27 , Other configuration features of the second, hollow element 2 B are identical to those of the first flat, hollow element 2A which is in the 5 is shown. The sump-forming areas 18 and 19 the two adjacent second hollow elements 2 B are each in a communicating manner with each other as in the case of connecting the adjacent first hollow elements 2A connected with each other.

The 7 shows the construction of the third flat, hollow element 2C located at the right end. As it is in the 7 is shown in the right aluminum plate 15C which is used to partially the third flat, hollow element 2C to form the pretension height of all sump forming protruding areas 24A similar to that of the tube area forming protruding areas 23 , Also is in the right aluminum plate 15C no through hole in each of the top walls of the two lower header forming protruding portions 24 educated. Furthermore, in the right aluminum plate 15C a through hole, which is referred to as the refrigerant inlet 12 serves in the top wall of the upper front header forming protruding area 24 formed, and is a through-hole, which as the refrigerant outlet 13 serves in the top wall of the upper, rear sump forming protruding area 24A educated. Flange areas projecting to the right 28 and 29 are integral in the respective top walls of the header forming protruding portions 24A around the refrigerant inlet and refrigerant outlet 12 and 13 each arranged. Other configuration features of the third flat hollow element 2C are identical to those of the first flat, hollow element 2A which is in the 5 is shown. Container forming areas 18A and 19A the third flat hollow element 2C are in a communicating manner at the sump forming areas 18 respectively. 19 of the left side adjacent first flat, hollow element 2A as in the case of the connection of the adjacent first flat, hollow elements 2A appropriate. If the two flange areas 28 and 29 the third, flat hollow element 2C into the refrigerant inflow port 14a and the refrigerant outflow port 14b the pipe connection plate 14 are used, the pipe connection plate 14 on the third flat, hollow element 2C soldered.

Although detailed illustrations are omitted, the flat hollow member disposed at the left end is identical in construction to the third flat hollow member except that there is no through-hole in the top walls of all header forming protruding portions 24A is formed and that the pipe connection plate 14 not soldered to it. The flat, hollow element 2C at the left end is in a mirror-image manner with respect to the third flat, hollow element 2C arranged.

The 8th shows the construction of the fourth flat, hollow element 2D which is located at a central position with respect to the left-right direction. As it is in the 8th shown are in the two aluminum plates 15D which are used to partially the fourth flat, hollow element 2D form a plurality of vertically extending inwardly projecting ribs 31 at intervals from front to back on the top walls of the pipe area forming protruding areas 23 formed by the top walls are deformed inwards. The protrusion height of the ribs 31 is equal to that of the tube area forming protruding areas 23 , A vertically elongated, rectangular flat plate 32 made of aluminum is between the two aluminum plates 15D provided in sandwich arrangement. Circumferential edge areas of the flat plate 32 are on the two aluminum plates 15D Festge Solder while passing between peripheral edge areas of the two aluminum plates 15D lie in sandwich arrangement. Projecting end portions of the ribs 31 the two aluminum plates 15A are at the flat plate 32 soldered. Two through holes 33 are at a lower end portion of the flat plate 32 at positions which the two through holes 25 from each of the two aluminum plates 15A correspond, formed, and have a diameter equal to that of the through hole 25 is. An inner rib is not within the fourth flat hollow element 2D arranged. Other configuration features of the fourth flat, hollow element 2D are identical to those of the first flat hollow element 2A which is in the 5 is shown. The sump-forming areas 18 and 19 the fourth flat, hollow element 2D are in a communicating manner at the sump forming areas 18 respectively. 19 of the right adjacent first flat hollow element 2A and the bin forming areas 18 respectively. 19 the second flat, hollow element adjacent to the left side 2 B as in the case of the connection of the adjacent first flat, hollow element 2A appropriate. The first plate 32 separates the refrigerant inlet header section 3 and the third intermediate collection section 7 from each other and the refrigerant outlet header section 4 and the fourth intermediate header section 8th from each other. The two passage openings 33 make a connection between the first intermediate header section 5 and the second intermediate header section 6 and communication between the fifth intermediate header section 9 and the sixth intermediate header section 11 ,

The 9 shows the construction of the fifth flat, hollow element 2E which is arranged at a predetermined distance away from the right end. As it is in the 9 shown are two aluminum plates 15D similar to those used to partially in the 8th shown fourth flat, hollow element 2D used to form part of the fifth flat, hollow element 2E to build. A vertically elongated, rectangular flat plate 34 , which is made of aluminum, is between the two plates 15D provided in sandwich arrangement. Circumferential edge areas of the flat plate 34 are on the two aluminum plates 15D while soldered between the peripheral edge portions of the two aluminum plates 15D are held in sandwich arrangement. The passage openings 35 are at an upper end portion of the flat plate 34 at positions which the two through holes 25 match that in an upper end portion of each of the two aluminum plates 15D are formed, formed, and a through hole 35 is at a lower end portion of the flat plate 34 at a position corresponding to the front through holes 25 the two aluminum plates 15D corresponds, trained. The passage openings 35 have a diameter equal to that of the through holes 25 is. A resistance opening 36 which assumes a circular shape in the present embodiment is at the lower end portion of the flat plate 34 at a position corresponding to the rear passage openings 25 the two aluminum plates 15D corresponds to, arranged and has a diameter smaller than that of the through holes 25 is. A management area 37 which assumes a partial spherical shape in the present embodiment is integral with the right side surface of the flat plate 34 at a position below the resistance opening 36 arranged and is suitable to refrigerant, passing through the resistance opening 36 in an upward direction, that is, toward the back side refrigerant flow pipe portion 17 near the flat plate 34 respectively. Other configuration features of the fifth flat, hollow element 2E are identical to those of the fourth flat, hollow element 2D which is in the 8th is shown. The sump-forming areas 18 and 19 the fifth flat, hollow element 2E are in a communicating manner at the sump forming areas 18 respectively. 19 the left and right adjacent, first flat, hollow elements 2A as in the case of the connection of the adjacent first flat, hollow elements 2A appropriate.

The front side refrigerant flow tube areas 16 the flat, hollow elements 2A . 2 B . 2C . 2D and 2E connect the refrigerant inlet header section 3 and the first intermediate header section 5 and communication between the second intermediate header section 6 and the third intermediate header section 7 ago. The backside refrigerant flow tube areas 17 the flat, hollow elements 2A . 2 B . 2C . 2D and 2E Make a connection between the refrigerant outlet header section 4 and the sixth intermediate header section 11 and communication between the fourth intermediate header section 8th and the fifth intermediate header section 9 ago. The third intermediate storage section 7 and the fourth intermediate bin section 8th communicate with each other via communication channels 27 that in the second flat, hollow elements 2 B are formed. Each of the refrigerant inlet header sections 3 , the second intermediate sump sections 6 and the sixth intermediate header section 11 serves as a refrigerant flow dividing header section. The refrigerant flow dividing header section has a refrigerant passage that allows a refrigerant flow in the longitudinal direction thereof and the downstream end of which is closed with respect to the refrigerant flow direction, and causes refrigerant to be divided into a plurality of refrigerant flow tube regions 16 and 17 flows. The refrigerant outlet sump section 4 , the first intermediate collection section 5 and the fifth intermediate bin section 9 each serve as a refrigerant flow merging header section. The refrigerant flow merging header section has a refrigerant passage that allows a refrigerant flow in the longitudinal direction thereof and the downstream end of which is open with respect to the refrigerant flow direction, and causes refrigerant, which is composed of a plurality of refrigerant flow tube sections 16 and 17 flows, be merged. The refrigerant passage of the refrigerant inlet header section 3 communicates with the refrigerant inlet 12 ; the refrigerant passage of the refrigerant outlet header section 4 communicates with the refrigerant outlet 13 ; the refrigerant passage of the first intermediate header section 5 communicates with that of the second intermediate header section 6 ; and the refrigerant passage of the fifth intermediate header section 9 communicates with that of the sixth intermediate header section 11 , A back area of the lower end portion of the flat plate 34 of the fifth flat, hollow element 2E ie an area of the flat plate 34 located within the sixth intermediate bin section 11 is present, is a resistance plate area 38 , which is the refrigerant channel of the sixth intermediate header section 11 blocked. The resistance opening 36 which are in the resistance plate area 38 is formed, the refrigerant, which through the refrigerant passage of the sixth intermediate header section 11 flows, a resistance. Preferably, the size of the resistance opening 36 1/60 to 1/10 of the resistance opening 36 , 1/60 to 1/10 of the cross-sectional area (dashed in the 10 ) of the refrigerant passage of the sixth intermediate header section 11 , It has been experimentally obtained that the preferred size of the resistance opening 36 1/60 to 1/10 of the cross-sectional area of the refrigerant passage of the sixth intermediate header section 11 is. When the size of the resistance opening 36 less than 1/60 of the cross-sectional area of the refrigerant passage of the sixth intermediate header section 11 is, decreases the amount of refrigerant, which is behind the resistance plate 38 exits, excessively. When the size of the resistance opening 36 is larger than 1/10 of the cross-sectional area, the effect of correcting the uneven temperature distribution of the discharged air, which is achieved by an uneven air-velocity distribution on the upstream side with respect to the air flow direction, may become insufficient.

In the production of the evaporator 1 components are mounted by him and provisionally fixed, and the assembled components are soldered together.

The evaporator 1 is housed in a housing, which is provided in a compartment of a vehicle, such as an automobile, and forms, together with a compressor and a condenser, a refrigeration cycle used as an automotive air conditioner.

In the above-described evaporator 1 occurs as in the 10 4, a two-phase refrigerant in vapor-liquid phase, which has passed through a compressor, a condenser, and an expansion valve (pressure reducing agent) into the refrigerant inlet header section 3 from an inlet pipe through the refrigerant inflow port 14a the pipe connection plate 14 and the refrigerant inlet 12 one. When the refrigerant enters into the refrigerant inlet sump section 3 is entered, flows through the refrigerant passage to the left, the refrigerant flows under divides into the front side refrigerant flow tube areas 16 ; enters the first intermediate header section 5 one; flows together to the left through the refrigerant passage of the first intermediate header section 5 ; and enters the second intermediate header section 6 through the passage opening 33 one. While the refrigerant entering into the second intermediate sump section 6 is entered, flows through the refrigerant passage to the left, the refrigerant flows divided into the front-side refrigerant flow tube areas 16 connected to the second intermediate header section 6 are connected; flows through the refrigerant flow tube areas 16 up; and enters the third intermediate header section 7 one. That into the third intermediate storage section 7 Occurring refrigerant enters the fourth intermediate header section 8th through the communication channels 27 the second flat, hollow element 2 B one. When the refrigerant enters the fourth intermediate reservoir section 8th entered, flows through the refrigerant passage to the right, the refrigerant flows divided into the rear side refrigerant flow tube areas 17 , which with the fourth intermediate sump section 8th are connected; flows through the refrigerant flow tube areas 17 downward; and enters the fifth intermediate header section 9 and then reunited. The refrigerant which enters the fifth intermediate sump section 9 has occurred, flows through the Kältemit telkanal to the right; and enters the sixth intermediate storage section 7 through the passage opening 33 one. when the refrigerant enters the sixth intermediate header section 11 entered, flows through the refrigerant passage to the right, the refrigerant flows divided into the rear side refrigerant flow tube areas 17 , which with the sixth intermediate tank section 11 are connected; flows through the refrigerant flow tube areas 17 up; and enters the refrigerant outlet header section 4 one. The refrigerant entering the refrigerant outlet sump section 4 has entered, enters an outlet pipe through the refrigerant outlet 13 and the refrigerant outflow port 14b the pipe connection plate 14 and flows out of the outlet pipe. While passing through the refrigerant flow tube areas 16 and 17 the flat, hollow elements 2A . 2 B . 2C . 2D and 2E is flowing, the refrigerant is subjected to a heat exchange with the air, which through the air passage column in the direction of the in the 1 and 10 shown arrow X flows, and flows out of the evaporator 1 in a vapor phase.

Since the cross-sectional area of the refrigerant passage of the sixth intermediate header section 11 through the resistance opening 36 of the resistance plate area 38 is decreased, the amount of refrigerant flowing through a portion of the refrigerant passage, which is downstream of the resistance plate region 38 is relatively small, so that the amount of refrigerant flowing through the refrigerant flow tube areas 17 , which are connected to the area of the refrigerant channel, flows, becomes relatively small. Accordingly, when the air velocity distribution on the upstream side becomes uneven with respect to the air flow direction, and accordingly the air velocity becomes in a region which is rightward of the resistance plate region 38 If there is a fall, an extreme drop in the temperature of the air having passed through the area can be prevented, so that the temperature distribution of discharged air can be made uniform. Furthermore, in the area where the air velocity becomes low, freezing of condensed water on the surfaces of the refrigerant flow tube areas and the ribs can be prevented.

If the resistance plate area 38 within the sixth intermediate sump section 11 is provided, decreases the velocity of the refrigerant, which passes through the resistance opening 36 of the resistance plate area 38 kicked, too. This causes the refrigerant to have difficulty in the refrigerant flow tube area 17 to flow, which in the vicinity of the resistance plate area 18 lies. The presence of the leadership area 37 however, facilitates the entry of the refrigerant into the refrigerant flow tube area 17 , which is near the resistance plate area 38 lies. As a result, uniformity in view of the divided refrigerant flow into the refrigerant flow tube portions 17 connected to an area of the sixth intermediate header section 11 connected downstream of the resistance plate region 38 is to be produced.

In the above-described embodiment 1, the resistance plate area is 38 within the sixth intermediate sump section 11 provided, and is the resistance opening 36 in the resistance plate area 38 educated. However, the present invention is not limited above. A plurality of resistance plate portions may be formed within at least one of the refrigerant flow dividing header portions, ie, at least one of the refrigerant inlet header portion 3 , the second intermediate sump section 6 and the sixth intermediate header section 11 be provided, wherein in each of the resistance plate regions, a resistance opening is formed. Alternatively, at least one resistance plate portion may be formed within each of a plurality of the refrigerant flow dividing header portions, ie, in each of at least two portions of the refrigerant inlet header portion 3 , the second intermediate sump section 6 and the sixth intermediate header section 11 be provided, wherein a resistance opening is formed in each of the resistance plate regions. In these cases, resistance openings of different sizes can be present mixed. Also, resistance openings may be provided mixed in different vertical positions within the respective refrigerant channels.

Embodiment 2

The present embodiment is in the 11 to 15 shown. The 15 shows the overall structure of an evaporator of the embodiment 2. The 12 to 14 show the construction of essential areas of the evaporator; and the 15 shows the flow of a refrigerant in the evaporator.

With reference to the 11 is the evaporator 40 configured to have a plurality of flat, hollow elements 41A . 41B . 41C and 41D each having a vertically elongated rectangular shape, are arranged in a layered state in the left-right direction and connected to each other, with their width in the front-to-rear direction (the air flow direction) extend. The evaporator 40 around holds a refrigerant inlet header section 42 extending in the left-right direction, a refrigerant outlet header section 43 that is continuous with and to the right of the refrigerant inlet header section 43 is provided and extends in the direction from left to right; a first intermediate header section 44 upstream (in the flow direction downstream of) the refrigerant inlet header section 42 is arranged and extends in the direction from left to right; and a second intermediate header section 45 that is continuous with and to the right of the first intermediate header section 44 and in front of the refrigerant outlet header section 43 is provided (see 15 ).

A refrigerant inlet 46 is at the left end of the refrigerant inlet header section 42 formed, and a refrigerant outlet 47 is at the right end of the refrigerant outlet header section 43 educated. Although not shown, by suitable means is a refrigerant inlet pipe (not shown) with the refrigerant inlet 46 and is a refrigerant outlet pipe (not shown) with the refrigerant outlet 47 connected.

As it is in the 11 to 14 shown includes each of the flat hollow elements 41A . 41B . 41C and 41D two vertically extending rectangular aluminum plates 48A . 48B or 48C whose peripheral edge portions are soldered together. Each of the aluminum plates 48A . 48B and 48C is made of an aluminum brazing sheet having an aluminum braze layer on each of its opposite sides. A hairpin-shaped refrigerant flow tube area 50 and two projecting sump forming areas 53 and 54 are between the two aluminum plates 48A . 48B or 48C provided, which partially the flat, hollow element 41A . 41B . 41C or 41D form. The hairpin-shaped refrigerant flow tube area 50 comprises two vertically extending, projecting linear regions 51 and a projected communication area 52 for communication between the two projected linear areas 51 to produce at the upper ends. The two above header forming areas 53 and 54 are with corresponding lower end portions of the two projecting linear portions 51 of the refrigerant flow tube area 50 connected. A wavy inner rib 55 Made of aluminum, each of the flat, hollow elements is made up exclusively of flat, hollow elements 41C and 41D ie in each of the flat, hollow elements 41A and 41B arranged in such a way that they extend over the two projecting linear areas 51 of the refrigerant flow tube area 50 extend. The wavy inner rib 55 is on the two aluminum plates 48A soldered. Two corrugated aluminum inner ribs may be separated in the corresponding protruding linear regions 51 of the refrigerant flow tube area 50 be arranged.

In the flat hollow elements 41A . 41B . 41C and 41D is the height of the sump-forming areas 53 and 54 in the left-right direction greater than that of the refrigerant flow tube area 50 , The sump forming areas 53 or 54 the adjacent flat, hollow elements 41A . 41B . 41C or 41D are soldered together. The back sump forming areas 53 the flat, hollow elements 41A . 41B . 41C and 41D form the refrigerant inlet header section 42 and the refrigerant outlet header section 43 , Similarly, the front sump forming areas form 54 the first and second intermediate header sections 44 and 45 , Gaps between the refrigerant flow tube areas 50 the adjacent flat hollow elements 41A . 41B . 41C and 41D serve as air passage gaps. Wavy outer ribs 56 made of aluminum are arranged in the corresponding air passage columns and on the corresponding flat, hollow elements 41A . 41B . 41C and 41D soldered. The refrigerant flow tube areas 50 and the outer ribs 56 form a heat exchange core section.

The 12 shows the construction of the first flat, hollow element 41A which is one of the flat, hollow elements with the exception of the flat hollow elements 41B , which are provided at the left and right ends, of the flat hollow member 41C which is located at a central position with respect to the left-right direction and the flat hollow member 41D which is provided at a predetermined distance away from the right end is. As it is in the 12 is shown includes the aluminum plate 48A at the right side, which is used to partially the first flat, hollow element 41A to form, two erstrec kende in the vertical direction, projecting to the right, front and rear, linear area-forming protruding areas 57 a rightward projecting communication area forming protruding area 58 suitable for communication between the upper ends of the projecting portions forming the linear portions 57 to form and have a projection height equal to that of the linear portions forming protruding portions 57 is; and two rightwardly projecting sump forming protruding areas 59 connected to the corresponding lower ends of the projecting portions forming the linear portions 57 are connected and have a protrusion height greater than that of the linear area forming and the communication area forming protruding areas 57 and 58 are. A plurality of inwardly protruding arcuate ribs 51 are at certain intervals on the top wall of the communication area forming protruding area 58 formed by the top wall is deformed inwards. Ribs 61 have a bump height equal to that of the linear region forming protruding portions 57 is. The top wall of each of the sump forming protruding areas 59 is punched out to thereby a through hole 60 to build. The left-side aluminum plate 58A , which is used to partially the first flat, hollow element 41A is a reflection of the right-hand aluminum plate 48A and similar portions are designated by like reference numerals. The two aluminum plates 48A are assembled so that the openings of the linear regions forming, the communication area forming and the collecting box forming protruding areas 57 . 58 . 59 lie opposite each other, with the inner rib 55 sandwiched between, and then soldered. This is how the first hollow element becomes 41A educated. The sump-forming areas 53 and 54 from the two adjacent first flat, hollow elements 41A are each connected in a communicating manner with each other so that slightly smaller size end portions of the sump forming protruding areas 59 from a first flat, hollow element 41A in the corresponding through holes 60 the sump forming protruding areas 59 the other first flat, hollow element 41A used and soldered in it.

Like this in the 11 is shown in the right-hand aluminum plate 48B which is used to partially the second flat, hollow element 41B , which is provided at the right end, to form the projection height of the two header forming protruding portions 59A equal to that of the linear areas forming protruding areas 57 , Also is in the right side aluminum plate 48B no through hole in each of the top walls of the two lower header forming protruding portions 59A provided while the refrigerant outlet 47 in the top wall of the lower rear sump forming protruding area 59A is trained. Other configuration features of the second flat, hollow element 41B are identical to those of the first flat, hollow element 41A which is in the 12 is shown. The sump-forming areas 53 and 54 the second flat, hollow element 41B be in a communicating manner at the sump forming areas 53 respectively. 54 of the left side adjacent first flat, hollow element 41A as in the case of the connection of the adjacent first flat, hollow elements 41A appropriate.

Although not shown, the flat, hollow element is 41B which is disposed at the left end in a mirror-image manner with respect to the second flat hollow member 41B arranged at the right end and is identical in construction to the second flat, hollow element 41B with the exception that instead of the refrigerant outlet 47 the refrigerant inlet 46 in the rear sump forming protruding area 59A the aluminum plate 48 is trained.

The 13 shows the construction of the third flat, hollow element 41C which is located at a central position with respect to the left-right direction. as it is in the 13 shown are in the two aluminum plates 48C which are used to partially the third flat, hollow element 41C to form a plurality of vertically extending inwardly projecting ribs 62 at intervals from front to back on the top walls of the linear areas forming protruding areas 57 formed by the top walls are deformed inwards. The protrusion height of the ribs 62 is equal to that of the linear areas forming protruding areas 57 , A vertically elongated, rectangular flat plate 63 , which is made of aluminum, is between the two aluminum plates 48C provided in a sandwich arrangement. Circumferential edge areas of the flat plate 63 are on the two aluminum plates 48C while soldered between the peripheral edge portions of the two aluminum plates 48C lie in sandwich arrangement. Projecting end portions of the ribs 62 the two aluminum plates 48C are at the flat plate 63 soldered. A passage opening 64 is at a lower end portion of the flat plate 63 at a position which the front through-hole 60 from each of the two aluminum plates 48C corresponds, is formed and has a diameter equal to that of the through hole 60 is. An inner rib is not inside the third flat, hollow element 41C arranged. Other configuration features of the third flat, hollow element 41C are identical to those of the first flat, hollow element 41A which is in the 12 is shown. The sump-forming areas 53 and 54 the third flat, hollow element 41C are in a communicating manner at the sump forming areas 53 respectively. 54 the left and right adjacent first flat, hollow elements 41A as in the case of the connection of the adjacent first flat, hollow elements 41A appropriate. The first plate 63 separates the calender inlet header section 42 and the chiller tel outlet header section 43 from each other. The passage opening 64 provides a connection between the first intermediate header section 44 and the second intermediate header section 45 ago.

The 14 shows the construction of the fourth flat, hollow element 41D which is arranged at a predetermined distance away from the right end. As it is in the 14 shown are two aluminum plates 48C similar to those used to partially in the 13 shown third flat, hollow element 41C partially used to form the fourth flat, hollow element 41D to build. A vertically elongated, rectangular flat plate 65 , which is made of aluminum, is between the two aluminum plates 48C provided in sandwich arrangement. Circumferential edge areas of the flat plate 65 are on the two aluminum plates 48C while soldered between the peripheral edge portions of the two aluminum plates 48C is held in sandwich arrangement. A passage opening 66 is at a lower end portion of the flat plate 65 at a position corresponding to the rear passage openings 60 the two aluminum plates 48C correspond, trained. The passage opening 66 has a diameter equal to that of the through hole 60 is. A resistance opening 67 which assumes a circular shape in the present embodiment is at the lower end portion of the flat plate 65 at a position corresponding to the front through holes 60 the two aluminum plates 48C corresponds to, arranged and has a diameter smaller than that of the through holes 60 is. A management area 68 which assumes a partial spherical shape in the present embodiment is integral with the right side surface of the flat plate 65 at a position below the resistance opening 67 arranged and is suitable to a refrigerant, which through the resistance opening 67 in an upward direction, that is, in the direction of the front-side protruding linear portion 51 of the refrigerant flow area 50 near the flat plate 65 respectively. Other configuration features of the fourth flat, hollow element 41D are identical to those of the third flat, hollow element 41C which is in the 13 is shown. The sump-forming areas 53 and 54 the fourth flat, hollow element 41D are in a communicating manner at the sump forming areas 53 respectively. 54 left and right adjacent first flat, hollow elements 41A as in the case of the connection of the adjacent first flat, hollow elements 41A appropriate.

The refrigerant flow tube areas 50 the flat, hollow elements 41A . 41B . 41C and 41D connect the refrigerant inlet header section 42 and the first intermediate header section 44 and a connection between the second intermediate header section 45 and the refrigerant outlet header section 43 ago. The refrigerant inlet sump section 43 and the second intermediate header section 45 each serve as a refrigerant flow dividing header section. The refrigerant flow dividing header section has a refrigerant passage that allows refrigerant flow in the longitudinal direction thereof and the downstream end of which is closed with respect to the refrigerant flow direction, and causes refrigerant to be divided into a plurality of refrigerant flow tube areas 50 flows. The first intermediate storage section 44 and the refrigerant outlet header section 43 each serve as a refrigerant flow merging header section. The refrigerant flow merging header section has a refrigerant passage that allows refrigerant flow in the longitudinal direction thereof and the downstream end of which is open with respect to the refrigerant flow direction, and causes refrigerant, which is composed of a plurality of refrigerant flow tube sections 50 flows, be merged. The refrigerant passage of the refrigerant inlet header section 42 communicates with the refrigerant inlet 46 ; the refrigerant passage of the refrigerant outlet header section 43 communicates with the refrigerant outlet 47 ; the refrigerant passage of the first intermediate header section 44 communicates with that of the second intermediate collection container 45 over the passage opening 64 , A front portion of the lower end portion of the flat plate 65 the fourth flat, hollow element 41D ie an area of the first plate 65 which is within the second intermediate sump section 45 is a resistance plate area 69 , the refrigerant channel of the second intermediate storage compartment section 45 blocked. The resistance opening 67 which are in the resistance plate area 69 is formed reduces the cross-sectional area of the refrigerant passage of the second intermediate header section 45 , Preferably, the size of the resistance opening 67 1/60 to 1/10 of the cross-sectional area (dashed in the 15 ) of the refrigerant passage of the second intermediate header section 45 , The reason for this is similar to that of Embodiment 1.

In the production of the evaporator 40 components are mounted by him and provisionally fixed, and the assembled components are soldered together.

The evaporator 40 is in a housing, which is provided in a compartment of a vehicle such as an automobile, and together with a compressor and a condenser, forms a refrigeration cycle used as an automotive air conditioner.

In the above-described evaporator 40 occurs as in the 15 4, a two-phase vapor-liquid-phase refrigerant which has passed through a compressor, a condenser and an expansion valve (pressure reducing agent) is introduced into the refrigerant inlet header section 42 from the inlet pipe through the refrigerant inlet 46 one. When the refrigerant enters into the refrigerant inlet sump section 42 has flowed, flows through the refrigerant passage to the right, the refrigerant flows divided into the refrigerant flow tube areas 50 connected to the refrigerant inlet header section 42 are connected; flows through the refrigerant flow tube areas 50 ; enters the first intermediate header section 44 one; flows together to the right through the refrigerant passage of the first intermediate header section 44 ; and enters the second intermediate header section 45 through the passage opening 64 one. When the refrigerant enters into the second intermediate sump section 45 entered, flows through the refrigerant passage to the right, the refrigerant flows divided into the refrigerant flow tube portions 50 connected to the second sump section 45 are connected; flows through the refrigerant flow tube areas 50 ; and enters the refrigerant outlet header 43 one. The refrigerant entering the refrigerant outlet sump section 43 has entered, enters an outlet pipe through the refrigerant outlet 47 and flows out of the outlet pipe. While passing through the Kältemit tel-flow tube areas 50 the flat, hollow elements 41A . 41B . 41C and 41D flows, the refrigerant is subjected to a heat exchange with the air, which through the air passage column in the direction of the in the 11 and 15 shown arrow X flows, and flows out of the evaporator 40 in a vapor phase.

Since the cross-sectional area of the refrigerant passage of the second intermediate header section 45 through the resistance opening 65 the resistance plate 69 is reduced, the amount of refrigerant flowing through a portion of the refrigerant passage, which is downstream of the resistance plate region 69 is relatively small, so that the amount of refrigerant flowing through the refrigerant flow tube areas 50 , which are connected to the area of the refrigerant channel, flows, becomes relatively small. Accordingly, when the air velocity distribution on the upstream side becomes uneven with respect to the air flow direction, and accordingly the air velocity becomes in a region which is rightward of the resistance plate region 69 If there is a fall, an extreme drop in the temperature of the air that has passed through the area can be prevented. Further, in the area where the air velocity becomes low, freezing of condensed water on the surfaces of the refrigerant flow tube areas and the ribs can be prevented.

If the resistance plate area 69 within the second intermediate sump section 45 is provided, decreases the velocity of the refrigerant, which passes through the resistance opening 67 of the resistance plate area 69 kicked, too. This causes the refrigerant to have difficulty in the refrigerant flow tube area 50 to flow, which in the vicinity of the resistance plate area 69 lies. The presence of the leadership area 68 however, facilitates the entry of the refrigerant into the refrigerant flow tube area 50 , which are near the resistance plate area 69 lies. As a result, uniformity in the divided refrigerant flow into the refrigerant flow pipe portions 50 connected to an area of the second intermediate header section 45 located downstream of the resistance plate area 69 is, connected, produced.

In the embodiment 2 described above, the resistance plates 69 within the second intermediate sump section 45 provided and is the resistance opening 67 in the resistance plate area 69 educated. However, the present invention is not limited thereto. A plurality of resistance plate portions may be formed within at least one of the refrigerant flow dividing header portions, ie, at least the refrigerant inlet header portion 42 or the second intermediate sump section 45 be provided, wherein in each of the resistance plate regions, a resistance opening is formed.

Alternatively, at least one resistance plate portion may be formed in each of a plurality of the refrigerant flow dividing end of the header portions, ie, in the refrigerant inlet header portion 42 and the second intermediate header section 45 be provided, wherein a resistance opening is formed in each of the resistance plate regions. In these cases, resistance openings of different sizes may be mixed. Also, resistance openings may be provided mixed in different vertical positions within the respective refrigerant channels.

industrial applicability

Of the layered heat exchangers according to the present The invention is preferably used, for example, as an evaporator for motor vehicle air conditioners used which refrigeration circuits on board of a vehicle.

SUMMARY

An evaporator 1 , which is implemented by a layered heat exchanger, has a refrigerant inlet header section 3 , a refrigerant outlet header section 4 and a plurality of intermediate header sections 5 to 11 , From the collection container sections 3 to 11 has the sixth intermediate storage section 11 a refrigerant passage which allows a refrigerant flow in its longitudinal direction and whose downstream end is closed with respect to the refrigerant flow direction, and which causes refrigerant to flow divided into a plurality of refrigerant flow tube portions. The refrigerant entering the refrigerant inlet sump section 3 from a refrigerant inlet flows into the refrigerant outlet header section 4 through the refrigerant flow tube sections and through the intermediate header sections 5 to 11 and flows out of a refrigerant outlet 13 , A resistance plate area 38 is within the sixth intermediate sump section 11 provided to block the refrigerant passage of this, which extends in the longitudinal direction of it. A resistance opening 36 is in the resistance plate area 38 configured to oppose the refrigerant flowing through the refrigerant passage, a resistance. When this laminated heat exchanger is used as an evaporator of a vehicle air conditioner, the temperature distribution of the discharged air can be made uniform even if the air velocity distribution on the upstream side becomes uneven with respect to the air flow direction.

Claims (17)

A layered heat exchanger with a plurality of flat, hollow elements, each of the flat, hollow elements two elongated in the vertical direction Metal plates whose peripheral edge areas are interconnected are a protruding refrigerant flow tube area, which is formed between the two metal plates, and a projecting header forming area, the opposite lying ends of the refrigerant flow tube area is attached, wherein the sump forming areas of adjacent flat, hollow elements in a layered state are interconnected, gaps between the refrigerant flow tube areas of adjacent flat, hollow elements as air passage gaps serve the sump-forming Areas of the flat, hollow elements include a refrigerant inlet header section that has a Refrigerant inlet comprising, a refrigerant outlet collecting section, which a refrigerant outlet and a plurality of intermediate header sections at least one of the sump portions as a refrigerant flow dividing Header section serves, which a refrigerant channel having a refrigerant flow in the longitudinal direction allowed by him and one with respect to the refrigerant flow direction downstream End has which is closed and which causes refrigerant into a plurality of refrigerant flow tube areas divided streams, being refrigerant into the refrigerant inlet header section of the Refrigerant inlet flows in, through the refrigerant flow tube sections and flows through the intermediate header sections into the The refrigerant outlet header section flows and flows out of the refrigerant outlet, wherein a resistance region in at least one of the refrigerant flow dividing ends Header sections is provided to the refrigerant, through the refrigerant channel, which is in a longitudinal direction of the refrigerant flow divider end Header section extends to oppose a resistance. A laminated heat exchanger according to claim 1, wherein the resistance region has a resistance opening in a Resistor plate area is formed, which within the Refrigerant-flow-dividing collecting section is provided in a manner to block its refrigerant passage. A laminated heat exchanger according to claim 2, wherein the resistance plate portion is a portion of a flat plate Made of metal, sandwiched between two metal plates arranged and attached to it, which are used to to form the flat, hollow element, the area of the flat Plate inside the refrigerant flow dividing end Collection container section is provided; and wherein in a region of the flat plate, the in another collection container section with the refrigerant channel is present, a refrigerant passage opening formed is and a cross-sectional area has, which is equal to the refrigerant channel is. A laminated heat exchanger according to claim 2 or 3, wherein a plurality of resistance plate regions are within at least ei a refrigerant flow dividing header portion is provided and the resistance opening is formed in each of the resistance plate portions. A laminated heat exchanger according to claim 4, wherein the resistance openings mixed with different sizes are provided. A laminated heat exchanger according to claim 4, wherein the resistance openings in different vertical positions within the corresponding Refrigerant channels mixed available. A laminated heat exchanger according to claim 2, wherein at least one resistance plate area within each from a plurality of refrigerant flow dividing ends collecting sections is provided and the resistance opening in the resistance plate area is trained. A laminated heat exchanger according to claim 7, wherein the resistance openings mixed of different sizes available. A laminated heat exchanger according to claim 7, wherein the resistance openings in different vertical positions within the corresponding Refrigerant channels mixed available. A laminated heat exchanger according to claim 2, wherein the size of the resistance openings 1/60 to 1/10 of the cross-sectional area of the refrigerant channel of the refrigerant flow dividing end collecting section is. A laminated heat exchanger according to claim 2, wherein a leadership area at one with respect to the refrigerant flow direction downstream surface the resistance plate area is provided to refrigerant, which through the resistance opening has entered, in the direction of the refrigerant flow tube area near the resistance plate area. A laminated heat exchanger according to claim 1, wherein the flat, hollow element is two in the vertical direction extending refrigerant flow tube areas, the one another in an air flow direction are spaced, and two sump-forming areas, the each at the upper and lower end portions of the fla chen, hollow Elements are provided, wherein the sump-forming Areas with the respective upper ends of the two refrigerant flow tube areas are connected and spaced from each other in the air flow direction, and the other two sump-forming ones Areas with the corresponding lower ends of the two refrigerant flow tube areas are connected and spaced from each other in the air flow direction. A laminated heat exchanger according to claim 12, comprising a refrigerant header section, a refrigerant outlet header section located upstream of the refrigerant inlet header section with respect to the air flow direction, a first intermediate header section below of the refrigerant inlet header section, a second intermediate header section disposed in tandem with the first intermediate header section, a third intermediate header section disposed above the second intermediate header section in tandem with the refrigerant inlet header section; A sump section is disposed a fourth sub header section located downstream of the third sub header section with respect to the air flow direction and in tandem with the refrigerant outlet header section, a fifth intermediate header section disposed below the fourth intermediate header section, a sixth intermediate header section disposed below the refrigerant outlet header section and in tandem with the fifth intermediate header section, wherein the refrigerant inlet section The header section, the first intermediate header section, the second intermediate header section and the third intermediate header section each have header forming portions of the flat hollow members disposed toward a downstream side with respect to the air flow direction; the refrigerant outlet header section, the fourth intermediate header section, the fifth intermediate header section, and the sixth intermediate header section each include the header forming areas of the flat hollow members that are toward a downstream side with respect to the air flow direction , exhibit; the refrigerant flow tube portions of the flat hollow members communicate between the refrigerant inlet header portion and the first intermediate header portion, communication between the second intermediate header portion and the third intermediate header portion, communication between the fourth intermediate header portion and the fifth intermediate header section and communication between the sixth intermediate header section and the refrigerant outlet header section; the third Intermediate bin section and the fourth intermediate bin section communicate with each other via communication channels formed in the flat hollow members; the refrigerant inlet header section, the second intermediate header section, and the sixth intermediate header section each serve as a refrigerant flow dividing header section having a refrigerant passage that permits refrigerant flow in the longitudinal direction thereof and with respect to Refrigerant flow direction has a closed downstream end and causes the refrigerant flows divided into a plurality of refrigerant flow tube areas; the refrigerant outlet header section, the first intermediate header section, and the fifth intermediate header section each serve as a refrigerant flow merging header section having a refrigerant passage that allows refrigerant flow in the longitudinal direction thereof and one with respect to the refrigerant flow direction downstream open end has and causes refrigerant, which flows from a plurality of refrigerant flow tube areas, is merged; the refrigerant passage of the refrigerant inlet header section communicates with the refrigerant inlet, the refrigerant passage of the refrigerant outlet header section communicates with the refrigerant outlet; the refrigerant passage of the first intermediate header section communicates with that of the second intermediate header section; and the refrigerant passage of the fifth intermediate header section communicates with that of the sixth intermediate header section. A laminated heat exchanger according to claim 1, wherein the flat, hollow member has a hairpin-shaped refrigerant flow area, the two vertically extending, projecting linear Areas spaced from each other in the air flow direction, and a preceding communication area for producing a Communication between the two above linear ranges at the having upper ends, and two sump forming areas, the formed at the upper end portion of the flat hollow member are, wherein the two header forming areas at corresponding across from lying ends of the refrigerant flow tube area mounted and spaced from each other in the air flow direction. A laminated heat exchanger according to claim 14, with a refrigerant inlet header section, a refrigerant outlet header section, in tandem with the refrigerant inlet header section is arranged, a first intermediate header section, that in relation to the air flow direction downstream from the refrigerant inlet header section is arranged, and a second intermediate header section, with respect to the air flow direction downstream of the refrigerant outlet header section and arranged in tandem with the first intermediate header section is, wherein the refrigerant inlet header section and the refrigerant outlet header section each the collecting container forming Areas of flat, hollow elements pointing towards one downstream Side with respect to the air flow direction lie, have; the first intermediate header section and the second Intermediate header section each the collecting container forming Areas of the flat, hollow elements, which are towards a downstream side with respect to the air flow direction lie, have; the refrigerant flow tube areas the flat, hollow elements communicate between the refrigerant inlet header section and the first intermediate header section and communication between the second intermediate header section and the refrigerant outlet header section produce; the refrigerant inlet sump section and the second intermediate header section each as a refrigerant flow divider Header section serve, which a refrigerant channel having a refrigerant flow in the longitudinal direction allowed by him and one with respect to the refrigerant flow direction closed downstream Has end and which causes a refrigerant divided into one Plurality of refrigerant flow tube areas flows; the refrigerant outlet sump section and the first intermediate storage section each as a refrigerant flow-merging Header section serve, which has a refrigerant channel, the one refrigerant flow in its longitudinal direction allowed and one with respect to the refrigerant flow direction open downstream end and causes refrigerant, which consists of a plurality of refrigerant flow tube areas flows, together becomes; the refrigerant channel of the refrigerant inlet header section with the Refrigerant inlet communicating; the refrigerant channel the refrigerant outlet header section with the Refrigerant outlet communicating; and the refrigerant channel of the first intermediate bin section with the of the second intermediate header section. A refrigeration cycle with a compressor, a condenser and an evaporator, the evaporator being a layered heat exchanger according to one of claims 1 to 15. A vehicle in which a refrigeration cycle according to claim 6 is installed as a vehicle air conditioner.