JP2000121282A - Dual type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a drop in heat exchange capacity in a dual type heat exchanger. SOLUTION: A connection part 400 between a radiator tank 230 and a condenser tank 120 is positioned on the side of a condenser core part 110 from the condenser tank 120 as viewed from the upstream side of the stream of air. As a result, the connection part 400 is located in the steam of air passing toward both core parts 110 and 210 so that the connection part 400 is cooled by the passing air. So, a part of heat transmitting to the condenser tank 120 through the connection part 400 from the radiator tank 230 is radiated into the passing air at the connection part 400. This enables restricting of heat transfer to the condenser tank 120 from the radiator tank 230 thereby preventing a drop in the heat exchange capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compound heat exchanger in which a plurality of heat exchangers are integrated, in which a condenser for a vehicle refrigeration cycle and a radiator for cooling engine cooling water are integrated. It is effective when applied to a heat exchanger.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No.
In the invention described in Japanese Patent No. 287886, a double heat exchanger is configured by integrating a tank connected to a tube of each heat exchanger.

[0003]

By the way, the tank is
Since the fluid is supplied to the tubes of the respective heat exchangers, the dual heat exchanger described in the above publication is applied to those in which the temperatures of the fluids flowing through the heat exchangers are different from each other, such as a condenser and a radiator. Then, the heat of the higher temperature fluid (engine cooling water in this example) is transmitted to the other fluid (refrigerant in this example) through the integrated tank, and the heat exchanger (this In the example, a capacitor)
A problem arises that the heat exchange capacity of the heat exchanger decreases.

[0004] In view of the above, an object of the present invention is to prevent a heat exchange capacity from being reduced in a double heat exchanger.

[0005]

The present invention uses the following technical means to achieve the above object. Claim 1,
In the inventions described in 3 to 5, both tanks (120, 130,
220, 230) is located in the flow of the circulation air so as to be cooled by the circulation air flowing toward both heat exchangers (100, 200). And

Accordingly, the second tank (220, 23)
0) through the connection (400) to the first tank (12).
0, 130) is radiated into the flowing air at the joint (400), so that the second tank (220,
230) to the first tank (120, 130). Therefore, it is possible to prevent the heat exchange capacity of the double heat exchanger (particularly, the first heat exchanger (100)) from being reduced.

According to the second to fifth aspects of the present invention, the connecting portion (400) connecting the two tanks (120, 130, 220, 230) is viewed from the upstream side of the air flow and the first tank (120, 130). ) Is located closer to the first core portion (110). Thereby, the second tank (2
20, 230) through the joint (400) to the first tank (120, 130).
00), the heat is radiated into the circulating air, so that the second tank (220, 230) transfers the first tank (120, 130).
Heat transfer can be suppressed.

Therefore, it is possible to prevent the heat exchange capacity of the double heat exchanger (particularly, the first heat exchanger (100)) from being reduced. According to the third aspect of the present invention, the connecting portion (400)
Is characterized in that a plurality of tanks (120, 130, 220, 230) are discretely formed in the longitudinal direction.

As a result, the second tank (220, 23
0) to the first tank (120, 130). In the invention according to claim 4,
The thickness of the joint (400) is determined by the two tanks (120, 13).
0, 220, 230) (123, 23)
3, 234).

As a result, the second tank (220, 23
0) to the first tank (120, 130). In the invention according to claim 5,
The coupling part (400) is characterized in that it has a wave shape composed of a plurality of bent parts. Thereby, the second tank (22
0, 230) to the first tank (120, 130).

Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
The present invention is applied to a compound heat exchanger in which a condenser (first heat exchanger) for a vehicle air conditioner and a radiator for engine cooling (second heat exchanger) are integrated.

Usually, the temperature of the refrigerant (first fluid) flowing through the condenser (condenser) is lower than the temperature of the engine cooling water (second fluid) flowing through the radiator. As shown in FIG.
0 is arranged upstream of the radiator 200 in the air flow, and is arranged at the forefront of the engine room in series with the air flow.

Hereinafter, a compound heat exchanger (hereinafter, abbreviated as a heat exchanger) according to the present embodiment will be described. FIG. 1 is a perspective view of a heat exchanger according to the present embodiment, and FIG.
It is -A sectional drawing. Reference numeral 110 denotes a capacitor core of the capacitor 100, and reference numeral 210 denotes a radiator core of the radiator 200. Then, both core parts 110 and 210
Are arranged in series with the air flow with a predetermined gap δ between both tubes 111 and 211 described later in order to block heat conduction from each other.

Further, the capacitor core unit 110 is configured as shown in FIG.
As shown in FIG. 5, the condenser tube 111 is formed in a flat shape and forms a coolant passage, and corrugated (corrugated) fins 112 brazed to the condenser tube 111. The radiator core 210 also has the same structure as the capacitor core 110, and includes a radiator tube 211 and a fin 212 arranged in parallel with the capacitor tube 111.

The fins 112 and 212 are formed with louvers 113 and 213 for promoting heat exchange. The louvers 113 and 213 are integrally formed with the fins 112 and 212 by a roller forming method or the like. Have been. Reference numeral 300 denotes a side plate that forms a reinforcing member for the core portions 110 and 210.
Numerals 0 are arranged at both ends of both core parts 110 and 210 as shown in FIG. In addition, the side plate 300
As shown in FIG. 2, the cross-sectional shape is substantially U-shaped.
It is integrally formed from one aluminum plate.

Incidentally, in FIG. 1, reference numeral 310 denotes a bracket for mounting the heat exchanger to a vehicle. In addition, a first radiator tank 220 that distributes cooling water to each radiator tube 211 is disposed at one end of the end of the radiator core 210 on which the side plate 300 is not disposed, and at the other end, A second radiator tank 230 for collecting the cooling water after the heat exchange is disposed.

At the upper end of the first radiator tank 220, there is provided an inlet 221 through which cooling water flowing out of the engine flows into the first radiator tank 220. An outlet 23 through which cooling water flows toward the engine is provided at a lower end side.
1 is provided. Reference numerals 222 and 232 denote joint pipes for connecting external piping (not shown) to the radiator tanks 220 and 230. These joint pipes 222 and 232 are connected to the respective radiator tanks 220 and 230 by brazing. It is connected to the.

Reference numeral 120 denotes a first condenser tank for distributing the refrigerant of the condenser core 110 to each condenser tube 111, and 130 denotes a second condenser of the condenser core 110 for recovering the refrigerant after heat exchange (condensation). It is a tank. Reference numeral 121 denotes an inflow port through which a refrigerant discharged from a compressor (not shown) of the refrigeration cycle flows into the first condenser tank 120. Reference numeral 131 denotes an expansion of the refrigeration cycle of the refrigerant after heat exchange (condensation). This is an outflow port for flowing out to a valve (not shown).

Reference numerals 122 and 132 denote joint pipes for connecting external piping (not shown) to both condenser tanks 120 and 130. These joint pipes 122 and 132 are connected to each condenser tank by brazing. 120 and 130. The second radiator tank 230, as shown in FIG. 3, forms an aluminum radiator core plate 233 connected to the radiator tube 211 and the radiator core plate 233 to form a space for the second radiator tank 230. Aluminum radiator tank body 23
4 and the two 233 and 234 are integrally joined by brazing.

On the other hand, the first condenser tank 120 is formed of a cylindrical aluminum condenser tank main body 123 which is connected to the condenser tube 111 and forms a space of the first condenser tank 120. Further, the two tanks 120 and 230 are integrated at a connecting portion 400 for connecting the condenser tank main body 123 and the radiator core plate 233, and the connecting portion 400, when viewed from the air flow upstream side, is a first condenser. The capacitor core 110 is bent in a U-shape with the capacitor core 110 protruding so as to be located closer to the capacitor core 110 than the tank 120.

The condenser tank body 123 and the radiator core plate 233 are integrally formed by extrusion or drawing, and after the end of the extrusion or drawing, a part of the portion corresponding to the joint 400 is pressed. By removing by processing or the like, the joint 400
As shown in FIG. 4, a plurality of tanks 110 and 210 are formed discretely in the longitudinal direction.

The first radiator tank 220 and the second condenser tank 130 are also connected to the second radiator tank 2.
30 and the first condenser tank 120, the radiator tank 230 will be used hereinafter to include both the radiator tanks 220 and 230 unless otherwise specified. Similarly, the condenser tank 120 will be referred to as the both condenser tanks 120 and 230. , 130 are used.

Here, an outline of a method of manufacturing the condenser tank main body 123 and the radiator core plate 233 will be described. First, the condenser tank main body 123 and the radiator core plate 233 are integrally formed by extrusion or drawing (forming step). In the molding step, the portion corresponding to the joint 400 is, as shown in FIG.
It has a flat shape without being bent in a letter shape.

Next, an insertion hole (not shown) into which the condenser tube 111 is inserted is formed in the condenser tank main body 123 by machining (mechanical process). Then, a part of the portion corresponding to the joint 400 is removed by press working or the like, and the radiator tube 21 is removed.
After forming an insertion hole (not shown) into which the wire 1 is inserted (first pressing step), as shown in FIG. 5B, a portion corresponding to the joint 400 is bent into a U-shape by pressing. (Second press step).

Next, the features of this embodiment will be described. The coupling section 400 is formed so as to be located closer to the condenser core section 110 than the first condenser tank 120 when viewed from the air flow upstream side, so that the coupling section 400 includes the condenser 100 (condenser core section 110) and the radiator. 20
0 (radiator core unit 210) is located in the flow of the circulating air flowing toward the radiator core unit 210, and the joint 400 is cooled by the circulating air.

Therefore, part of the heat transmitted from the radiator tank 230 to the condenser tank 120 via the joint 400 is radiated into the flowing air at the joint 400, so that the condenser tank 1 is moved from the radiator tank 230 to the condenser tank 1.
20 can be suppressed. As a result, it is possible to prevent the heat exchange capacity of the heat exchanger (particularly, the condenser 100) from decreasing.

(Second Embodiment) In the above-described embodiment, the connecting portion 400 has a simple U-shape having one bent portion. However, in the present embodiment, as shown in FIG. Coupling part 40
0 is a wave shape composed of a plurality of bent portions.
As a result, the heat conduction distance when heat is transferred from the radiator tank 230 to the condenser tank 120 becomes longer, so that the condenser tank 12
Heat transfer to zero can be further suppressed.

(Third Embodiment) In the above embodiment, the coupling portion 400, the condenser tank main body 123 and the radiator core plate 233 all have the same thickness, but in the present embodiment, the thickness of the coupling portion 400 is As shown in FIG. 7, the thickness of the members (the condenser tank main body 123, the radiator core plate 233, and the radiator tank main body 234) constituting both tanks 120 and 230 is thinner.

As a result, the cross-sectional area of the joint 400 is reduced, so that the heat transfer from the radiator tank 230 to the condenser tank 120 can be further suppressed. By the way, in the above-described embodiment, a plurality of coupling portions 400 are discretely formed in the longitudinal direction of both tanks 110 and 210. However, the coupling portion 400 is formed over the entire region in the longitudinal direction of both tanks 110 and 210. May be.

In the above-described embodiment, the connecting portion 400
Is the first condenser tank 1 when viewed from the airflow upstream side.
20 is located closer to the capacitor core 110 than the capacitor 20. However, the present invention cools the joint 400 with the flowing air by locating the joint 400 in the flow of the flowing air. For example, the joint 400 may be protruded from the condenser tank 120 to the side opposite to the capacitor core 110 so that the joint 400 is located in the flowing air.

Further, as in the third embodiment, the thickness of the connecting portion 400 may be corrugated in a state in which the thickness is smaller than the thickness of the members forming the tanks 120 and 230. As shown in FIG. 8, the receiver (liquid receiver) 5 of the refrigeration cycle
00 and the second condenser tank 130 may be integrated. Further, in the molding step of the above-described embodiment, the connecting portion 40
Although the part corresponding to 0 was not U-shaped, but was flat,
In the forming step, a member having the U-shaped coupling portion 400 may be formed by extrusion or drawing.

In the pressing step, the second pressing step may be performed before the first pressing step. FIG.
As shown in (2), an oil cooler 600 for cooling engine oil and torque converter oil may be built in the second radiator tank 200. Further, in the above-described embodiment, the condenser fin 112 and the radiator fin 21
Although the two fins 112 and 212 are separate bodies, both fins 112 and 212 may be integrated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a compound heat exchanger according to an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a perspective view of a connecting portion.

FIG. 5 is an explanatory view showing an outline of a method for manufacturing a condenser tank body and a radiator core plate.

FIG. 6 shows a composite heat exchanger according to a second embodiment;
It is sectional drawing corresponding to BB cross section of FIG.

FIG. 7 shows a composite heat exchanger according to a third embodiment;
It is sectional drawing corresponding to BB cross section of FIG.

FIG. 8 is a perspective view of a compound heat exchanger according to a modification of the present invention.

[Explanation of symbols]

 100: condenser (first heat exchanger), 110: condenser core (first core), 111: condenser tube (first tube), 120: first condenser tank (first tank), 200: radiator (first) 2 heat exchanger), 210: radiator core (second core), 211: radiator tube (second tube), 230: second radiator tank (second tank).

Claims (5)

[Claims] 1. A first core portion (110) having a plurality of first tubes (111) through which a first fluid flows, and performing heat exchange between air and the first fluid, and the plurality of tubes. First
The first tube (11) communicates with the tube (111).
First tank (120, 13) extending in a direction orthogonal to 1)
0), a plurality of first heat exchangers (100) provided on the downstream side of the flow of air from the first core (110), and through which a second fluid having a higher temperature than the first fluid flows. A second core (210) for exchanging heat between air and the second fluid, having a second tube (211), and a predetermined gap with the first tank (120, 130); A second heat exchanger (200) provided with a second tank (220, 230) arranged and communicating with the second tube (211) and extending in a direction orthogonal to the second tube (211). A connecting portion (400) for connecting the two tanks (120, 130, 220, 230) is provided with a connecting portion (400).
30, 220, 230). Further, the connecting portion (400) is provided between the two heat exchangers (1).
(00, 200), wherein the heat exchanger is located in the flow of the flowing air so as to be cooled by the flowing air flowing toward the heat exchanger. 2. A first core (110) having a plurality of first tubes (111) through which a first fluid flows, and performing heat exchange between air and the first fluid, and the plurality of tubes. First
The first tube (11) communicates with the tube (111).
First tank (120, 13) extending in a direction orthogonal to 1)
0), a plurality of first heat exchangers (100) provided on the downstream side of the flow of air from the first core (110), and through which a second fluid having a higher temperature than the first fluid flows. A second core (210) for exchanging heat between air and the second fluid, having a second tube (211), and a predetermined gap with the first tank (120, 130); A second heat exchanger (200) provided with a second tank (220, 230) arranged and communicating with the second tube (211) and extending in a direction orthogonal to the second tube (211). A connecting portion (400) for connecting the two tanks (120, 130, 220, 230) is provided with a connecting portion (400).
30, 220, 230), and the connecting portion (400) is provided between the first tank (120, 130) and the first tank (120, 130) when viewed from the air flow upstream side.
A composite heat exchanger, which is located on the core (110) side. 3. The tank according to claim 1, wherein a plurality of the coupling portions are formed discretely in a longitudinal direction of the two tanks. Heat exchanger. 4. The apparatus according to claim 1, wherein the thickness of the connecting portion is smaller than the thickness of the members constituting the tanks. 4. The double heat exchanger according to any one of items 1 to 3. 5. The double heat exchanger according to claim 1, wherein the coupling portion has a wave shape including a plurality of bent portions.