JPH0650675A - Heat exchanger - Google Patents

Abstract

PURPOSE:To effectively utilize an entire core even if one heat exchanging medium does not flow by feeding independent first, second heat exchanging media to first, second elements, and feeding third heat exchanging medium to an outer surface side and fins. CONSTITUTION:First, second elements 3a, 3b are alternately aligned at each one or plurality, and the elements 3a and the elements 3b are respectively connected to each other liquidtightly in communication holes. Fins 4 are interposed between the opposed elements, and the elements 3a, 3b communicate with the independent first, second heat exchanging media 5, 6. Third heat exchanging medium 7 communicates with an outer surface side and the fins 4. Thus, even when any of the media 5, 6 does not communicate, heat transfer properties of the other medium can be improved through the common fin 4 with both the elements.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated heat exchanger in which a pair of elongated plate-like plates are superposed in opposite directions to constitute an element, and a plurality of elements are laminated via fins, and more particularly, to a laminated heat exchanger. The present invention relates to a compact heat exchanger with a small number of parts, which allows two types of heat exchange media, for example, engine cooling water and air conditioning refrigerant to be separately circulated by using one air-cooled heat exchanger core. .

[0002]

2. Description of the Related Art As an example, in a conventional one in which a radiator for cooling an engine and a condenser which is a heat exchanger for air conditioning are integrated, a core is divided into two parts at an intermediate portion in a parallel direction of tubes, and one of the core parts is divided into two parts. It has been proposed that a pair of tanks are provided at both ends of the tube, and another pair of tanks is arranged at both ends of each tube of the other core portion. Such a heat exchanger is characterized by being compact and having a small number of parts.

[0003]

However, in such a conventional heat exchanger, when air conditioning is not required, a part of the core is not used, and that part simply serves as a resistor for air circulation. there were. Therefore, an object of the present invention is to provide a heat exchanger in which the entire core can be effectively used even when one heat exchange medium does not flow, and the following configuration is adopted to achieve the object.

[0004]

In the heat exchanger of the present invention, the peripheral edges of a pair of elongated metal plates 11 facing each other with a small gap are liquid-tightly joined, and the outer peripheries are wide at both ends in the longitudinal direction. A small tank portion 1 is provided which is biased to project in any of the directions, and has a large number of elements in which communication holes 2 are formed in the small tank portion 1. The large number of the elements includes the first element 3a in which the small tank portion 1 is biased to one side and the second element 3b in which the small tank portion 1 is biased to the other side, and both elements are alternately arranged in parallel at one or more positions. First element 3a
The second element 3b and the second element 3b are liquid-tightly joined to each other through the communication hole 2, and the fins 4 are interposed and fixed between the opposing elements. Then, the first heat exchange medium 5 and the second heat exchange medium 6 which are independent from each other circulate in the first element 3a and the second element 3b, respectively, and the third heat exchange medium 7 is provided on the outer surface side and fins 4 thereof. It is characterized by being configured to be distributed.

[0005]

In FIG. 1, the first heat exchange medium 5 flows inside the first elements 3a communicating with each other, and the second heat exchange medium 6 flows through the second element 3b. A fin 4 is arranged between the first element 3a and the second element 3b, and the third heat exchange medium 7 flows to the fin 4 and the outer peripheral surface of each element. Thereby, between the first heat exchange medium 5 and the third heat exchange medium 7, and between the second heat exchange medium 6
And the third heat exchange medium 7 are simultaneously heat-exchanged. Next, when the circulation of the first heat exchange medium 5 is stopped, heat is exchanged only between the second heat exchange medium 6 and the third heat exchange medium 7. At this time, the fin 4 is the first element 3
Since both a and the second element 3b are in contact with each other and are common, any fins 4 are effectively utilized and heat exchange of the second heat exchange medium 6 is promoted.

[0006]

Embodiments of the heat exchanger of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic perspective view of a heat exchanger showing an embodiment of the present invention, and FIG. 2 is a first element 3 thereof.
It is an exploded perspective view in a. 3 is an assembly perspective view thereof, FIG. 4 is a plan view of the present heat exchanger, and FIG. 5 is a front view thereof. As shown in FIG. 2, the element of this heat exchanger comprises a pair of elongated plate-shaped metal plates 11 which are superposed in opposite directions. The outer peripheral edge of the metal plate 11 is slightly raised, and a slight flange portion 10 is provided on the peripheral edge. Further, the small tank portion 1 is formed such that both longitudinal end portions of the metal plate 11 are biased to one side in the width direction. The small tank portion 1 is provided with a communication hole 2, and the hole edge portion of the communication hole 2 is integrally formed to project in a short pipe shape.

Such elements are laminated as shown in FIG. 1, and the small tank portion 1 is biased to one side of the first element 3a.
And the second elements 3b biased to the other side are alternately arranged. Then, corrugated fins 4 are arranged between the first element 3a and the second element 3b facing each other, and the contact portions of each component are fixed by brazing or soldering. The communication hole of the metal plate located at one end in the stacking direction is closed, and the inlet / outlet pipe 8 or 9 is projectingly fixed to the communication hole of the other metal plate in the stacking direction. As an example, a refrigerant for air conditioning flows as the first heat exchange medium 5 from the inlet / outlet pipe 8 on the upper side of the first element 3a, flows down in each first element 3a, and the inlet / outlet pipe 8 on the lower side.
The more it leaks. The engine cooling water as the second heat exchange medium 6 flows in from the inlet / outlet pipe 9 on the upper side of the second element 3b, flows in the longitudinal direction in each second element 3b, and flows from the inlet / outlet pipe 9 on the lower side. Is leaked.

As the third heat exchange medium 7, a cooling air flow accompanying the traveling of a fan or a vehicle is used as the first element 3.
It flows in the arrow direction between a and the second element 3b. Then, the first heat exchange medium 5 and the second heat exchange medium 6 are cooled by the third heat exchange medium 7, respectively. When the first heat exchange medium 5 is not used, the fins 4 are all in contact with the second element 3b, so that only the second heat exchange medium 6 exchanges heat. The present invention is not limited to the above-mentioned embodiment, and of course, the first element 3a and the second element 3a and the second element are divided into the respective required cooling amounts of the first heat exchange medium 5 and the second heat exchange medium 6. The number of 3b can be adjusted. For example, when the cooling capacity of the first heat exchange medium 5 is set to be smaller than the cooling capacity of the second heat exchange medium 6, it is possible to arrange the first elements 3a one by one and the second elements 3b every two. it can. Next, FIG. 2a shows a second embodiment of the present invention, in which both ends of the metal plate 11 are formed in a plane shape curved in the width direction. The curved portion and most of the width of the metal plate 11 are formed to have substantially the same width.

[0009]

The heat exchanger of the present invention comprises the first element 3
a and the second element 3b are alternately arranged in parallel with each other, and the first element 3a and the second element 3b are liquid-tightly connected to each other through the communication hole 2, and the fin 4 is provided between the opposing elements. Interposed, the first element 3a
The first heat exchange medium 5 and the second heat exchange medium 6 which are independent from each other circulate in the and the second element 3b, respectively. Since the third heat exchange medium 7 is configured to flow through the outer surface side and the fins 4, even when one of the first heat exchange medium 5 and the second heat exchange medium 6 does not flow through There is an effect that the heat conductivity of the other heat exchange medium can be improved via the fins 4 common to both elements. That is, since the common fin 4 is interposed and fixed to the first element 3a and the second element 3b, it is possible to effectively use the fin 4 even when one heat exchange medium does not flow. The heat radiation area can be substantially increased. Further, conventionally, since a heat exchanger core was provided for each heat exchange medium, it was only an obstacle to the air flow passage when one core was not used, but in the heat exchanger of the present invention, There is no such thing. And a compact heat exchanger with a small number of parts can be provided.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a heat exchanger of the present invention.

FIG. 2 is an exploded view of the elements of the heat exchanger.

FIG. 2a is a metal plate 11 forming an element of the heat exchanger.
6 is a partial schematic view showing another embodiment of the present invention.

FIG. 3 is an assembly explanatory view of the element.

FIG. 4 is a plan view of the present heat exchanger.

FIG. 5 is a front view of the same.

[Explanation of symbols]

 1 Small Tank Part 2 Communication Hole 3a First Element 3b Second Element 4 Fin 5 First Heat Exchange Medium 6 Second Heat Exchange Medium 7 Third Heat Exchange Medium 8 Inlet / Outlet Pipe 9 Inlet / Outlet Pipe 10 Flange 11 Metal Plate

Claims (1)

[Claims] 1. A pair of elongated metal plates (11) facing each other with a small gap are liquid-tightly joined to each other, and both ends in the longitudinal direction are biased so that the outer periphery is biased in any of the width directions. A small tank portion (1) is provided, and the small tank portion (1) has a large number of elements in which communication holes (2) are formed. The biased first element (3a) and the biased second element (3b) are alternately and alternately arranged in parallel, and the first element (3a) and the second element (3) are alternately arranged.
b) The two are fluid-tightly connected to each other through the communication hole (2), and the fins (4) are interposed and fixed between the opposing elements, and the first element (3a) and the second element (3).
The first heat exchange medium (5) and the second heat exchange medium (6), which are independent of each other, circulate in b) and the third heat exchange medium (7) is provided on their outer surface side and the fins (4). A heat exchanger characterized by being configured to be distributed.