JPH02247498A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger excellent in pressure resistance by connecting a reinforcing member to a first plate part and a first capsule part of each header tank, and to first and second tank parts to reduce stress applied on a junction between the header tanks. CONSTITUTION:An about 1.6mm thick aluminum internal column plate 30 is disposed in a first hollow part of a first header tank 20 and has substantially the same size as longitudinal one of the first hollow part. The internal column plate 30 includes a top side portion 31 brazed to an internal wall of a top 22a of a first capsule part 22, and first and second side walls 32, 33 are integrally formed extending slantingly toward a first plate part 21 of the top side 31. Further, a flat plate part 344 from the tip end 32a of the first side wall 32 and a flat plate part 35 from the tip end 33a of the second side wall 33 are integrally formed so as to be substantially parallel to the first plate part 21. The flat plate parts 34, 35 are brazed to and joined with one side surface 21a of the first plate part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a heat exchanger used, for example, in an automobile air conditioner, and is particularly effective for use in a condenser.

[Conventional technology]

Conventionally, heat exchangers used under high pressure, such as condensers, have been formed by bending multi-hole extruded tubes into meandering shapes in order to ensure pressure resistance. A heat exchange unit called a serpentine type is generally known in which corrugated fins are arranged between parallel tubes bent in a serpentine shape to constitute a heat exchange unit. However, in a type such as a serpentine type in which the refrigerant passage is formed by a single tube, there is a problem in that the heat exchange efficiency decreases because the pressure loss of the refrigerant in the tube increases.

Therefore, as shown in Fig. 9, in order to reduce pressure loss and improve heat exchange efficiency, a plurality of flat tubes 1 are arranged in parallel and header tanks 2 and 3 are provided at both ends of these tubes 1. A path header type heat exchanger is used. In this type of heat exchanger, the header tanks 2 and 3 are designed in such a way that consideration is given to processing (burring, etc.) of the insertion holes into which the tubes 1 are inserted, and the ease of assembling the tubes 1 to the header tanks 2 and 3. The tanks 2 and 3 are divided into two parts: capsule parts 2a and 3a forming a tank part, and plate parts 2b and 3b into which the tube 1 is inserted by closing the capsule parts 2a and 3a. Then, insert the tube 1 into the insertion holes 2C formed in the plate parts 2b and 3b.
After being inserted into the tank, the capsule parts 2a and 3a and the plate parts 2b and 3b are joined to form one header tank.

In the figure, reference numeral 4 denotes corrugated fins that promote heat exchange, 5 an inlet vibrator into which refrigerant is introduced from the compressor, and 6 an outlet vibrator which leads out the refrigerant toward the evaporator.

[Problem to be solved by the invention]

Here, the internal pressure of the radiator and heater core is approximately 10
kg/c4, and the internal pressure of the evaporator is approximately 45 kg/(,1a). Therefore, since the pressure inside the radiator, heater core, and evaporator is relatively low, the header tank is connected to the capsule section 2a (3a) and the plate section 2b. (3b) There is no problem even if a heat exchanger divided into two parts is used for a radiator, a heater core, or an evaporator.

However, when this heat exchanger is used as a condenser, the pressure inside the condenser increases to about 100 kg/cta, so the capsule part 2a (3a) and the plate part 2
High pressure acts on the inner wall surface of b (3b) (in the direction of arrows A and B in Fig. 10). Therefore, this high pressure causes the joint between capsule portion 2a (3a) and plate portion 2b (3b) to separate. There is a risk. If the joint between the capsule part and the plate part separates, there is a problem in that refrigerant leaks from the separated part.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat exchanger having a divided header tank, which has excellent pressure resistance and whose joints do not separate even when high pressure is applied inside the heat exchanger.

[Means to solve the problem]

In the present invention, a first header tank is divided into at least two parts and joined together to form a first hollow part therein, and a first header tank into which a heat exchange fluid is introduced;
A second header tank is divided into at least two parts and is joined together to form a second hollow part inside, and the fluid to be heat exchanged collects in the second hollow part, and the fluid to be heat exchanged flows inside, and one end is provided in the first and second hollow parts, and the plurality of tubes are opened in the first header tank and are connected in communication, and the other ends are opened in the second header tank and connected in communication; A technical means is adopted in which a reinforcing member is joined to each of at least two divided parts of the header tank and the second header tank.

The first header tank is the first header tank into which the tube is inserted.
The second header tank consists of a plate part and a first capsule part which forms a first hollow part by being joined to the first plate part, and the second header tank includes a second plate part into which the tube is inserted and the second plate part. and a second capsule part that forms a second hollow part by being joined to the second capsule part.

In addition, the first header tanks form a first hollow part by being joined to each other, and the first header tanks sandwich the tube.
It consists of a tank part and a second tank part, and the second header tank forms a second hollow part by being joined to each other, and it also consists of a third tank part and a fourth tank part that sandwich the tube.

[Action and effect]

When high pressure acts inside the first and second header tanks, a moment is generated around the joints of each header tank, and stress is applied to the joints. and the first capsule part (second capsule part), as well as the first tank part (third tank part) and the second tank part (fourth tank part),
The stress acting on the joints of the header tank is reduced. Therefore, the joints of each header tank will not separate.

As described above, the first plate part (second plate part) and the first plate part (second plate part)
Since it is possible to improve the bonding strength between the capsule part (second capsule part), the first tank part (third tank part) and the second tank part (fourth tank part), the pressure resistance strength of the heat exchanger can be improved. can be improved. Therefore, refrigerant and the like will not leak from inside the heat exchanger.

Furthermore, since each header tank can be divided, tubes can be easily assembled to the header tank, which improves productivity.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, the reference numeral 10 in the figures is an inlet vibrator made of aluminum that is connected to the discharge side of a compressor (not shown). will be introduced.

Reference numeral 20 denotes a first header tank which has a first hollow part inside and stores the refrigerant introduced from the inlet vibrator 10. 1 and the capsule part 22 are joined by brazing. The first plate portion 21 is provided with a protrusion 9 and a protruding burring portion 21b on one side 21a side, and an insertion hole 21c is formed in the inner periphery of the burring portion 21b.

Reference numeral 30 denotes an inner column plate (reinforcing member) made of aluminum and having a thickness of about 1.6 mm, which is disposed in the first hollow part of the first header tank 20. It has approximately the same length in the longitudinal direction. The inner pillar plate 30 has a top side portion 31 that is joined to the inner wall surface of the top portion 22a of the first capsule portion 22 by brazing. A first side wall portion 32 and a second side wall portion 33 are integrally formed, extending obliquely from the top side portion 31 toward the first plate portion 21 . Further, the flat plate part 34 is arranged from the tip 32a of the first side wall 32 to the flat plate part 34 and from the tip 33a of the second side wall 33 so as to be substantially parallel to the first plate part 21.
are integrally formed.

The flat plate part 34 and the flat plate part 35 are joined to one side surface 21a of the first plate part 21 by brazing. Here, an insertion groove 36 is formed in a portion of the inner pillar plate 30 that faces the burring portion 21b.

Reference numeral 40 denotes a porous extruded tube made of aluminum, through which the refrigerant accumulated in the first header tank 20 flows. One end 41 of this tube 40 is inserted into the insertion hole 21c of the first plate part 21 and the insertion groove 36 of the inner pillar plate 30, and the two are joined by brazing. Air passes between these tubes 40, thereby exchanging heat with the refrigerant.

Note that the tube 40 may be a flat tube with inner fins inserted therein.

Reference numeral 50 denotes a corrugated fin made of aluminum, which is provided between each tube 40, and is joined by brazing. The corrugated fins 50 promote heat exchange between the air and the refrigerant.

Reference numeral 60 denotes a second header tank to which the other end of the tube 40 is joined by brazing, and has a second hollow portion inside, where the refrigerant flowing through the tube 40 collects.

The second header tank is constructed by joining, by brazing, a flat second plate portion 61 made of aluminum and a first capsule portion 62 made of aluminum with a plate shape. The second plate part 61 and the second capsule part 62 are respectively connected to the first plate part 61 and the second capsule part 62.
It is configured similarly to the plate section 21 and the first capsule section 22. Further, in the second hollow portion of the second header tank 60, the inner column plate 30 is disposed similarly to the first hollow portion of the first header tank 20.

Reference numeral 70 denotes an outlet vibrator made of aluminum that leads out the refrigerant collected in the second header tank 60.
0 is connected to the inlet vibe of the evaporator (not shown).

With the above configuration, when the refrigerant compressed and discharged by the compressor (approximately 100 kg/c1a) flows into the first header tank 20 from the inlet pipe lO, a high pressure of approximately to Okg/c4 is generated on the inner wall of the first header tank 20. act.

Here, conventionally, the first plate 21 and the first capsule 2
In the present invention, pressure was applied only to the inner column plate 30.
Since the first plate 21 and the first capsule 22 are firmly joined by this, pressure also acts on the inner pillar plate 30. In addition, the first side wall portion 32 and the second side wall portion 33 of the inner pillar plate 40
Since pressure acts on each surface of the flat plate portion 34 and the flat plate portion 35, the pressure area acting on the first plate 21 and the first capsule 22 can be reduced. Therefore, stress acting on the joint between the first plate 21 and the first capsule 22 can be reduced. Therefore, the first plate 21
Since the first capsule 22 is not deformed, the joint between the first plate 21 and the first capsule 22 will not separate, and the refrigerant will not leak.

Note that the second header tank 60 is also similar to the first header tank 20.

Furthermore, the joint between the first plate 21 and the first capsule 22 may be caulked if necessary.

In addition, as shown in FIG. 4, the inner column plate 30 used in one embodiment
An inner column plate 80 having a shape like two joined together may be disposed inside the first header tank 20 and the second header tank 60. This allows the plate and the inner column plate, and the capsule and the inner column plate to Since the number of joints between the plate and the capsule can be increased, the joint strength between the plate and the capsule can be further improved.

Further, as shown in FIG. 5, a plurality of through holes 23 are provided in the top 22a of the capsule 22 (same as the capsule 62). Then, the inner column plate 90 passing through the through hole 23 is inserted into the first
Header tank 20 and second header tank 60 (Fig. 1)
It may be placed inside.

That is, the first upper part 91 having a U-shape of the inner pillar plate 90
is passed through the through hole 23 and joined to the capsule 22 by brazing. In addition, the second upper part 92 on the flat plate is attached to the capsule 22.
It is joined to the inner wall surface of the top portion 22a. And the inner pillar plate 90
The bottom portion 93 of the first plate 21 is joined to the first plate 21 by brazing. Thereby, the bonding force between the inner pillar plate and the capsule can be increased, so that the bonding force between the plate and the capsule can be further improved.

Next, other embodiments of the present invention will be described.

A header tank 100 (the first and second are the same) having a substantially triangular shape as shown in FIGS. 7 and 8 is provided.

That is, the header tank 100 is divided approximately at the center parallel to the axial direction of the tube 40, and the first (third)
A tank section 101 and a second (fourth) tank section 102 are formed.

A protruding burring part 103 and a protruding burring part 104 are formed in the first tank part 101 and the second tank part 102, respectively. U-shaped insertion holes are formed inside the burring portions 103 and 104, respectively. An annular insertion hole is formed by joining the first tank part 101 and the second tank part 102, and one end 41 of the tube 40 is inserted into this insertion hole.

Furthermore, an inner column plate 30 similar to the first invention is disposed in the hollow portion of the header tank 100. By brazing and joining the inner column plate 30 to the first tank parts 101 and 102, the first tank part 101 and the second tank part 102
It is possible to improve the bonding force with. The action and effect are the same as in the first embodiment.

Note that the inner pillar plate may have various shapes as used in the first invention.

With the above, the tube can be easily inserted into the header tank.
In addition to being easy to assemble, the joints of the header tank can be firmly held even when used in heat exchangers such as condensers where high pressure is applied inside the ladder tank. Therefore, problems such as refrigerant leakage due to peeling of the joint can be reliably prevented.

3 is a divided perspective view, FIG. 4 is a sectional view of a main part showing a modification of the inner pillar plate, FIGS. 5 and 6 are sectional views of a main part showing a modification of the inner pillar plate, and FIGS. FIG. 8 is a diagram showing another embodiment of the present invention, FIG. 7 is a sectional view of a main part, FIG. 8 is a split perspective view, and FIGS. 9 and 10 are diagrams showing a conventional embodiment. , FIG. 9 is a partial sectional view, and FIG. 10 is a sectional view of the main part.

20... First header tank, 21... First plate part, 22... First capsule part, 30... Inner column plate (
reinforcing member), 40... tube, 60... second header tank, 61... second plate part, 62... second
Capsule part.

Representative Patent Attorney Takashi Okabe (1 other person)

[Brief explanation of drawings]

Claims (3)

[Claims] 1. a first header tank which is divided into at least two parts and joined together to form a first hollow part therein, into which the heat exchange fluid is introduced; and a first header tank which is divided into at least two parts and joined together; a second header tank having a second hollow part formed therein, in which the heat exchange fluid collects; and a second header tank through which the heat exchange fluid flows and one end opening into the first header tank. and the other end is connected to the second
a plurality of tubes that open into the header tank and are connected to each other; and a plurality of tubes that are provided in the first and second hollow parts and connected to at least two divided parts of the first header tank and the second header tank. A heat exchanger comprising: a reinforcing member; 2. The first header tank includes a first plate part into which the tube is inserted, and a first capsule part that forms the first hollow part by being joined to the first plate part, and the second header tank is the second tube into which the tube is inserted.
2. The heat exchanger according to claim 1, comprising a plate portion and a second capsule portion that is joined to the second plate portion to form the second hollow portion. 3. The first header tank includes a first tank part and a second tank part that are joined to each other to form the first hollow part and sandwich the tube, and the second header tank is joined to each other. 2. The heat exchanger according to claim 1, further comprising a third tank part and a fourth tank part that form the second hollow part and sandwich the tube.