JP2001091185A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a header structure of multi-flow type condenser in which defective joint of a separator in a first header can be prevented without increasing cost regardless of variation in the manufacture or machining. SOLUTION: A positioning hole to be fitted with the positioning protrusion of a separator 6 punched from a metal plate of aluminum alloy is made at a specified position of the tank plate 20 of a first header 2 in a multi-flow type condenser. A rib is formed, by press, on the outer face of the bottom side wall of the header plate 21 of the first header 2 and a fitting groove for permitting partial overlap at the outer circumferential part of the separator 6 by a specified dimension (e.g. 0.2 mm-2.0 mm) is made in the inner surface of the bottom side wall. Consequently, the separator 6 can be jointed at a specified position in the first header 2 by soldering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger such as a condenser or a heater core of a vehicle air conditioner or a radiator of an engine cooling device, and more particularly to a partition plate for dividing the inside of a header into a plurality of tank portions. Related to the provided heat exchanger.

[0002]

2. Description of the Related Art Conventionally, a heat exchanger, for example, a multi-flow condenser (refrigerant condenser) has a core portion 102 formed by alternately stacking tubes 100 and corrugated fins 101 as shown in FIG. And side plates 1 on both outer sides of the core portion 102 in the stacking direction of the tubes 100.
03 and both ends of each tube 100 of the core 102.
It is manufactured by brazing them together.

[0003] The header 104 is attached to the tube 100.
Are divided into two parts in the direction of the passage, and are composed of a header plate 105 forming the inside and a tank plate 106 forming the outside. The header plate 105 has an insertion hole 10 into which the end of the tube 100 is inserted.
7 (for example, JP-A-4-34093, JP-A-5-18690).

[0004] In a multi-flow type condenser, FIG. 14 shows the entire core portion 102 formed by alternately stacking tubes 100 and corrugated fins 101 in order to increase the heat exchange efficiency by flowing the refrigerant in a meandering manner. As shown, the partition plate 109 is disposed in the header 104. The partition plate 109 has a header 10
No. 4 positioning projection 111 fitted into a positioning hole 110 provided at a predetermined position of the tank plate 106.
Is provided.

[0005]

However, in the conventional multi-flow type capacitor, the partition plate 1
Since 09 is brazed inside the header 104, a gap may be formed between the inner wall surface of the header 104 and the outer peripheral surface of the partition plate 109 due to manufacturing variation or processing variation, or the partition plate 109 may The partition plate 109 is likely to be poorly joined due to falling down obliquely.

As a result, the high-temperature and high-pressure refrigerant gas flowing from the inlet pipe does not go to the core portion, and
There is a problem that the heat exchange performance is significantly reduced by passing through the inside. Further, in a subcooled condenser provided with a liquid receiver (modulator), there is a problem that the liquid refrigerant stored in the modulator is heated and gasified.

Therefore, in order to solve the above-mentioned problems,
There has been proposed a heat exchanger in which an elastic partition plate in which a metal wire is made into a metal scourer is arranged in the middle of a refrigerant flow path between a header plate and a tank plate constituting a header (Japanese Patent Laid-Open No. 5-118786). However, it is very difficult to manufacture an elastic partition plate having such a shape, and there is a problem that the cost is increased.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to ensure that even if manufacturing variations and processing variations occur, it is possible to securely join by soldering at a predetermined position inside the header without increasing the cost, and to provide a partition in the header. It is an object of the present invention to provide a heat exchanger that can prevent poor joining of plates.

[0009]

According to the first aspect of the present invention, at least one of the two headers has an inner wall surface and an outer periphery of a partition plate for dividing one of the headers into a plurality of tank portions. By providing the concave portion into which a part of the portion is fitted, even if manufacturing variation or processing variation occurs, the partition plate can be securely joined by soldering at a predetermined position inside the header without increasing the cost. it can. As a result, there is no gap between the inner wall surface of the header and the outer peripheral surface of the partition plate, and problems such as the partition plate falling down in the header can be eliminated. Can be prevented.

According to the second aspect of the present invention, at least one of the two headers is formed into a semicircular bottom plate into which one ends of a plurality of tubes of a core portion are inserted, and the bottom plate. Of the ceiling-side plate in a semicircular arc shape joined so as to close the opening side of the base plate, the partition plate can be assembled so as to sandwich the partition plate between the bottom-side plate and the ceiling-side plate.

According to the third aspect of the present invention, a part of the outer peripheral portion of the partition plate is wrapped by a predetermined dimension in a substantially arc-shaped fitting groove formed in the circumferential direction of the inner wall surface of the bottom plate. By assembling in such a manner, it is possible to securely join by soldering at a predetermined position inside the header, while having an inexpensive and simple structure.

According to the fourth aspect of the present invention, a part of the outer peripheral portion of the partition plate is wrapped by a predetermined dimension in the substantially arc-shaped fitting groove formed in the circumferential direction of the inner wall surface of the ceiling side plate. By assembling in such a manner, it is possible to securely join by soldering at a predetermined position inside the header, while having an inexpensive and simple structure.

According to the fifth aspect of the present invention, the outer peripheral portion of the partition plate is fitted into the semicircular fitting groove formed in the circumferential direction on the inner wall surface on the tube side of at least one of the two headers. By wrapping a part of the header so as to wrap by a predetermined dimension, the header can be securely joined at a predetermined position inside the header by an inexpensive and simple structure.

According to the sixth aspect of the present invention, the semicircular notch into which the remaining portion of the outer peripheral portion of the partition plate is fitted on the opposite side of the tube side of at least one of the two headers. Is provided, the partition plate can be easily inserted into the substantially cylindrical header from the outside.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of First Embodiment] FIGS. 1 to 5 show a first embodiment of the present invention, and FIG. 1 shows a multi-flow type incorporated in a refrigeration cycle of an air conditioner for a vehicle. 2 to 4 are views showing a header structure of a multi-flow type capacitor.

The multi-flow condenser (refrigerant condenser) of the present embodiment is installed in a place where the traveling wind is easily received in an engine room of a vehicle, and is manufactured by integral brazing in a furnace. The condenser includes a core 1 for exchanging heat between a refrigerant and air, a substantially cylindrical first header 2 connected to one end of the core 1 in the width direction, and another A substantially cylindrical second header 3 connected to the end
And an inlet pipe (inlet pipe) 8 for allowing the refrigerant to flow into the first header 2, and an outlet pipe (outlet pipe) 9 for allowing the refrigerant to flow out of the first header 2. Here, a separator 6 that divides the internal space of the first header 2 into two inlet-side tank portions 4a and an outlet-side tank portion 4b is inserted into and joined to the first header 2.

The core 1 is formed by alternately stacking tubes 11 and corrugated fins 12, and has side plates 13 on both outer sides in the stacking direction. Tube 1
Reference numeral 1 denotes a flat tube made of a metal such as an aluminum alloy and having one or many refrigerant passages through which a refrigerant flows. The refrigerant exchanges heat between the refrigerant flowing inside and the outdoor air passing through the outside to condense and liquefy the refrigerant. This is a flow channel tube to be made.

The corrugated fin 12 is formed by forming a thin metal plate such as an aluminum alloy into a corrugated shape, and has a louver (not shown) for improving the heat exchange efficiency (heat transfer efficiency) between the refrigerant and the outdoor air on the surface. Is formed. The side plate 13 is made of a metal such as an aluminum alloy, holds the core shape of the tube 11 and the corrugated fin 12, and also serves as a bracket for mounting a capacitor to a mounting member (not shown) of, for example, an engine room of a vehicle. Function.

The first header 2 has a tank plate 20 (corresponding to a ceiling-side plate of the present invention) 20 having a semicircular cross section located on the outside and a header plate (book) having a semicircular cross section located on the inside. 21 (corresponding to the bottom-side plate of the present invention). Two caps 22 for closing the openings are attached to the openings at both ends of the first header 2 in the plate length direction.

The second header 3 has one tank 5 inside.
In the same manner as the first header 2, a tank plate 30 having a semi-circular cross-section located outside and a header plate 31 having a semi-circular cross-section located inside are combined into a substantially cylindrical shape. Is formed. And the second
Two caps 32 for closing the openings are attached to the openings at both ends in the plate length direction of the header 3.

Here, the tank plate 2 of the first header 2
In the ceiling wall of No. 0, a positioning hole 23 for fixing the separator 6 is formed. Also, the first and second headers 2, 3
A plurality of claw-shaped locking portions 24 and 34 for locking the outer surfaces of the opening-side edges of the header plates 21 and 31 by caulking the opening-side edges of the tank plates 20 and 30.
Are partially formed.

On the bottom side walls of the header plates 21 and 31 of the first and second headers 2 and 3, oval holes 25 into which the ends of the tubes 11 are inserted are formed.
1 are formed at an equal pitch in the plate length direction. On the outer wall surface of the bottom side wall of the header plate 21 of the first header 2, a stamping rib 26 is formed by press working or the like. On the inner wall surface of the bottom side wall of the header plate 21, a part of the outer peripheral portion of the separator 6 (the lower side portion in FIG. 5).
A fitting groove (corresponding to a concave portion of the present invention) 27 capable of wrapping 6a by a predetermined dimension (for example, about 0.2 mm to 2.0 mm) is formed in an arc shape in the inner circumferential direction. .

As the separator 6, a very inexpensive metal plate made of an aluminum alloy or the like is used, and as shown in FIG. 5, a positioning member provided at a predetermined position of the tank plate 20 of the first header 2 is used. A positioning projection 41 fitted into the hole 23 is provided. Also, the separator 6
2, as shown in FIG. 2, by setting its size to be equal to or more than A and equal to or less than B, a wrap margin of (BA) between the fitting groove 27 of the header plate 21 (for example, 0.2 mm to 2. 0mm
Degree).

[Operation of First Embodiment] Next, the operation of the capacitor of this embodiment will be briefly described with reference to FIGS.

When the operation of the vehicle air conditioner is started, a high-temperature, high-pressure gas discharged from a discharge port of the compressor after being compressed in a refrigerant compressor (compressor) rotated and driven by a power source such as an engine, for example. The refrigerant is supplied to the inlet pipe 8
And flows into the inlet-side tank portion 4a of the first header 2. The gas refrigerant that has flowed into the inlet-side tank 4a is distributed to a plurality of tubes 11 (upper tube group in the drawing) in the inlet-side tank 4a. And a plurality of tubes 11
When passing through these tubes 1, the gas refrigerant is heat-exchanged with outdoor air via corrugated fins 12 to be condensed and liquefied, and almost becomes a liquid refrigerant except for a part of the gas refrigerant. The refrigerant in such a gas-liquid two-phase state flows into the tank portion 5 of the second header 3 from the plurality of tubes 11.

The gas-liquid two-phase refrigerant that has flowed into the tank portion 5 is once collected and then distributed to a plurality of tubes 11 (a lower tube group in the drawing) in the tank portion 5. The gas-liquid two-phase refrigerant distributed to the plurality of tubes 11 exchanges heat with outdoor air via the corrugated fins 12 when passing through these tubes 11, and is condensed and liquefied to become a liquid refrigerant. Then, the liquid refrigerant flows from the plurality of tubes 11 into the outlet-side tank portion 4b of the first header 2. Then, the liquid refrigerant flowing into the outlet side tank portion 4b flows through the outlet pipe 9 into a pressure reducing device such as an expansion valve.

[Effects of the First Embodiment] As described above, the separator 6 inserted into the first header 2 has a part of the outer peripheral portion in the fitting groove 27 of the header plate 21 of the first header 2. It is fitted and positioned, and the positioning projection 41 is provided.
Are fitted into positioning holes 23 of the tank plate 20 and positioned. As a result, even if manufacturing variations or processing variations occur, the separator 6 can be arranged at a predetermined position in the first header 2 and can be arranged in the first header 2 without falling down, so that the cost is not increased. The separator 6 can be securely joined at a predetermined position inside the first header 2 by brazing.

As a result, no gap is formed between the inner wall surface of the first header 2 and the outer peripheral surface of the separator 6.
In addition, since the inconvenience of the separator 6 falling down in the first header 2 and the like can be solved, it is possible to prevent the joining failure of the separator 6 in the first header 2. Therefore, the high-temperature, high-pressure refrigerant gas flowing into the inlet-side tank portion 4a of the first header 2 through the inlet pipe 8 is
Without passing through the first header 2 and leaking to the outlet side tank portion 4b without going to the plurality of tubes 11, the heat radiation performance of the refrigerant is not reduced.

[Second Embodiment] FIG. 6 shows a second embodiment of the present invention and is a diagram showing a subcooled type capacitor provided with a modulator.

In this embodiment, a substantially cylindrical modulator 10 is joined to the outer wall surface of the ceiling plate of the tank plate 30 of the second header 3 by brazing. Further, the first header 2 is assembled in the same manner as in the first embodiment, and the internal space is divided into two inlet-side and outlet-side tank sections 4a, 4a.
Separator 6 is provided for dividing into b. And
In the second header 3, there is provided a separator 7, which is assembled in the same manner as the separator 6, and divides the internal space into two tank portions 5a, 5b.

Here, the modulator 10 has a gas-liquid separation chamber 50 extending in the height direction of the core 1. The gas-liquid separation chamber 50 is a gas-liquid separation unit that separates the refrigerant flowing into the inside from the tank 5 a of the second header 3 into gas and liquid and sends out only the liquid refrigerant to the tank 5 b of the second header 3. A substantially disk-shaped cap 51 is joined to the openings at the upper and lower ends of the modulator 10 by brazing.

In this embodiment, a fitting groove (not shown) into which a part of the outer peripheral portion of the separator 6 is fitted is provided on the inner wall surface of the bottom side wall of the header plate 21 of the first header 2 and the second header 2 By providing a fitting groove (not shown) into which a part of the outer peripheral portion of the separator 7 is fitted on the inner wall surface of the bottom side wall of the header plate 31 of the third header 3, the inside of the first header 2 is formed as in the first embodiment. Bonding failure of the separator 6 in
In addition, it is possible to prevent poor joining of the separator 7 in the second header 3.

Therefore, the modulator 1 of the present embodiment
In the subcooled type condenser provided with 0, the refrigerant flowing into the tank portion 5a of the second header 3 from the plurality of tubes 11 can be prevented from passing through the tank portion 5b, so that the liquid refrigerant stored in the modulator 10 can be prevented. It is possible to prevent the problem of heating and gasification.

[Third Embodiment] FIG. 7 shows a third embodiment of the present invention and is a view showing a header structure of a multi-flow capacitor.

In the present embodiment, an embossed rib 52 is formed on the outer wall surface of the ceiling of the tank plate 20 of the first header 2 by press working or the like. A fitting groove (corresponding to a concave portion of the present invention) is formed on the inner wall surface of the ceiling wall of the tank plate 20 so that a part of the outer peripheral portion of the separator 6 can be wrapped by about 0.2 mm to 2.0 mm. 53 are formed.

[Fourth Embodiment] FIG. 8 shows a fourth embodiment of the present invention and is a diagram showing a header structure of a multi-flow type capacitor.

In this embodiment, there is no protrusion of the bottom side wall of the header plate 21 to the outer wall surface.
A fitting groove (corresponding to a concave portion of the present invention) 54 is provided in the inner wall surface of the bottom side wall in an arc shape in the circumferential direction, so that the separator 6 in the first header 2 can be provided in the same manner as in the first embodiment.
Has the effect of preventing poor bonding.

[Fifth Embodiment] FIG. 9 shows a fifth embodiment of the present invention and is a view showing a header structure of a multi-flow type capacitor.

In this embodiment, the shape (tip shape) 6c of the outer peripheral portion of the separator 6 is changed to a pointed shape (a sharp angle).
In addition, the fitting groove provided on the inner wall surface of the bottom side wall of the header plate 21 of the first header 2 is formed as the acute angle groove 55, so that the fitting groove provided on the inner wall surface of the bottom side wall of the header plate 21 is formed. Workability can be improved.

Sixth Embodiment FIG. 10 shows a sixth embodiment of the present invention, and is a view showing a header structure of a multi-flow type capacitor.

In this embodiment, a substantially elliptical projection 56 is provided on the inner wall surface of the bottom side wall of the header plate 21 of the first header 2 by plastic working (for example, rolling extrusion). A fitting groove (corresponding to a concave portion of the present invention) 57 into which a part of the outer peripheral portion of the separator 6 is fitted is provided in the protrusion 56 in an arc shape in the circumferential direction.

Seventh Embodiment FIGS. 11 and 12 show a seventh embodiment of the present invention, and are views showing a header structure of a multi-flow capacitor.

The first header 2 of the present embodiment has a substantially cylindrical cross section, and has one end of a plurality of tubes 11 of the core 1 inserted therein. On the inner wall surface of the first header 2 on the tube side, a semicircular fitting groove 61 into which a part (a lower semicircular portion on the lower side) 6a of the outer peripheral portion of the separator 6 is fitted is formed in a circumferential direction. It is provided in an arc shape.

On the other side of the first header 2 with respect to the tube side, the remaining portion of the outer peripheral portion of the separator 6 (the upper semi-circular portion having a larger outer diameter than the lower semi-circular portion 6a in the drawing). 5) semicircular notch 62 into which 6b is fitted
Is provided. Thus, when the separator 6 is assembled to the first header 2, the separator 6 can be inserted into the first header 2 from the cutout portion 62 and then joined by brazing.

[Other Embodiments] In the present embodiment, the present invention is applied to first and second headers of a multi-flow type capacitor incorporated in a refrigeration cycle of a vehicle air conditioner or a subcooled type capacitor provided with a modulator. Two, three
However, the present invention may be applied to a header of a radiator of an engine cooling device or a header of a heater core of a vehicle heating device.

In the present embodiment, the present invention is applied to the case where the flow of the refrigerant is one.
Although the example in which the first and second headers 2 and 3 of the turn-type condenser (heat exchanger) are applied has been described, the present invention is applied to the case where the flow of the refrigerant is the header of the two-turn heat exchanger or the flow of the refrigerant. The present invention may be applied to a meandering heat exchanger header.

[Brief description of the drawings]

FIG. 1 is a front view showing a multi-flow condenser incorporated in a refrigeration cycle of a vehicle air conditioner (first embodiment).

FIG. 2 is a cross-sectional view showing a header structure of a multi-flow capacitor (first embodiment).

FIG. 3 is a cross-sectional view showing a header structure of a multi-flow capacitor (first embodiment).

FIG. 4 is a cross-sectional view showing a header structure of the multi-flow capacitor (first embodiment).

FIG. 5 is a front view showing a separator (first embodiment).

FIG. 6 is a front view showing a subcooled condenser including a modulator (second embodiment).

FIG. 7 is a cross-sectional view illustrating a header structure of a multi-flow capacitor (third embodiment).

FIG. 8 is a cross-sectional view illustrating a header structure of a multi-flow capacitor (fourth embodiment).

FIG. 9 is a cross-sectional view illustrating a header structure of a multi-flow capacitor (fifth embodiment).

FIG. 10 is a sectional view showing a header structure of a multi-flow capacitor (sixth embodiment).

FIG. 11 is a sectional view showing a header structure of a multi-flow capacitor (seventh embodiment).

FIG. 12 is a sectional view showing a header structure of a multi-flow capacitor (seventh embodiment).

FIG. 13 is a perspective view showing a main structure of a multi-flow capacitor (prior art).

FIG. 14 is a cross-sectional view showing a header structure of a multi-flow type capacitor (prior art).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core part 2 1st header (one header) 3 2nd header (other header) 6 Separator (partition plate) 7 Separator (partition plate) 10 Modulator 11 Tube 20 Tank plate (ceiling side plate) 21 Header plate (bottom part) 26 Launching rib 27 Fitting groove (concave portion) 30 Tank plate (Ceiling side plate) 31 Header plate (Bottom side plate) 62 Notch 4a Inlet tank 4b Outlet tank 5a Tank 5b Tank

Claims (6)

[Claims] 1. A core section in which a plurality of tubes through which a fluid flows are arranged, (b) two headers respectively connected to both ends of the core section, and (c) a header section of these two headers. A partition plate inserted into at least one of the headers to divide the inside of the one header into a plurality of tank portions; and (d) joining means for joining the partition plate to the one header by brazing. The heat exchanger according to claim 1, wherein the inner wall surface of the one header is provided with a concave portion into which a part of an outer peripheral portion of the partition plate is fitted. 2. The heat exchanger according to claim 1, wherein the one header has one end of a plurality of tubes of the core portion inserted therein, and has a bottom-side plate having a semicircular cross section, and the bottom portion. A heat exchanger comprising a ceiling plate having a semi-circular cross section and joined to close an opening of a side plate. 3. The heat exchanger according to claim 2, wherein the concave portion is capable of wrapping a part of an outer peripheral portion of the partition plate by a predetermined dimension, and is provided on an inner wall surface of the bottom plate. A heat exchanger characterized by a substantially arc-shaped fitting groove formed in a circumferential direction. 4. The heat exchanger according to claim 2, wherein the concave portion is capable of wrapping a part of an outer peripheral portion of the partition plate by a predetermined dimension, and the concave plate is configured to wrap the ceiling plate. Characterized in that it is a substantially arc-shaped fitting groove formed in the circumferential direction of the inner wall surface of the heat exchanger. 5. The heat exchanger according to claim 1, wherein the one header has a substantially cylindrical cross-section into which one ends of a plurality of tubes of the core portion are inserted. A part of the outer peripheral portion of the partition plate can be wrapped by a predetermined dimension, and the semi-circular arc-shaped fitting groove is formed in a circumferential direction of the inner wall surface on the tube side of the one header. Characterized heat exchanger. 6. The heat exchanger according to claim 5, wherein the one header has an opposite side to the tube side.
A heat exchanger, characterized in that a semicircular notch is provided in which the remaining portion of the outer periphery of the partition plate is fitted.