MXPA97002109A

MXPA97002109A - Condenser with integrated deposit for circuitode refrigerac

Info

Publication number: MXPA97002109A
Application number: MXPA/A/1997/002109A
Authority: MX
Inventors: Hu Zaiqian
Original assignee: Valeo Thermique Moteur
Priority date: 1996-03-25
Filing date: 1997-03-20
Publication date: 1998-04-01

Abstract

The condenser with integrated tank of the invention comprises a box (18) with a tubular wall (24) which is divided by a longitudinal partition (32) to a collector compartment (46) into which the tubes (12) of a beam open. , and a storage compartment (48) communicating with the collecting compartment (46) by means of holes (44) provided in the partition (32), said partition comprising a longitudinal edge (40) coupled in a longitudinal slot (30) of the wall (18) and a longitudinal edge (42) that remains supported against the tubular wall (24) of the box, in preparation for its joining by means of welding. Said condenser can be used mainly in air conditioning installations of motor vehicles

Description

CONDENSER WITH INTEGRATED DEPOSIT PRRfl REFRIGERATION CIRCUIT The invention relates to a capacitor with integrated reservoir, suitable for forming part of a refrigeration circuit, for example, of an air conditioning installation for a motor vehicle. More particularly, it relates to a condenser for a cooling circuit covered by a cooling fluid, comprising a set or bundle of finned tubes, mounted between two collecting boxes, and in which one of the collecting boxes communicates with a reservoir. In a refrigeration circuit such as the one mentioned, the refrigerant fluid in the superheated heat phase is sent, by means of a compressor, to a condenser where it is cooled successively or "de-heated", it condenses in a liquid phase hot and then "sub-cool" to a cold liquid phase. Then the condensed and cooled refrigerant fluid is sent by means of a decompressor to an evaporator where the heat changes with a flow of air to be sent to the interior of the vehicle. In this evaporator, the refrigerant fluid is transformed to the vapor phase, while the air flow is cooled to produce the conditioned air. The refrigerant fluid, in vapor phase, leaves the evaporator to reach the compressor and continue in that way. In known capacitors, of said type, the reservoir which is normally attached to the outlet of the condenser, is formed to the shape of a separate container. According to the French patent 93 10 325, from the same applicant as the present one, a condenser of this type is known in which the tank has a tubular configuration and is connected to one of the collector boxes, also of tubular configuration, by half ratchet legs. It is also known to form a tubular reservoir by extrusion, and to mount the extruded reservoir externally in a tubular collecting box. Said known solutions contribute to increase the thickener of the condenser and also need complex operations to obtain a mechanical and tight assembly between the tank and the collector box with which it communicates. Historically, said known solutions do not make it possible to simplify the assembly of transverse partitions inside the collection box. The main purpose of the invention is to solve the aforementioned drawbacks. For this purpose, it proposes a condenser of the type defined in the introduction, in which the collecting box and the tank are limited by a same tubular box with a tubular wall, which is divided by a longitudinal separation partition into a collecting compartment (which forms the collecting box) into which the tubes of the bundle open and a compartment reservoir (forming the reservoir), communicating with the collecting compartment by means of holes provided in the longitudinal separating partition, and wherein the longitudinal separating partition comprises a first longitudinal edge coupled in a longitudinal groove of the tubular wall of the box, and a second longitudinal edge resting against the tubular wall of the box; which allows a connection by welding between the box and the longitudinal separating partition. In this way, the collector box and the tank constitute the two adjacent compartments of the same tubular box, which allows to reduce mainly the overall volume of the collector-tank assembly and to simplify the assembly operations. The division of the tubular box is carried out simply by a longitudinal separating partition (hereinafter referred to as "separator") which is welded to the tubular wall of the box. In a preferred embodiment of the invention, the tubular wall of the box is generally cylindrical. Said configuration is considered the optimum to reduce the space occupied by the box, at the same time that a maximum resistance to the refrigerant fluid pressure is guaranteed. It can be a cylindrical shape with circular section or a non-circular section, for example, oval.

Advantageously, the tubes of the bundle extend in a non-radial direction with respect to the cylindrical section of the tubular wall of the box. The term "center" designates the geometrical or mathematical center in the large sense of the section of the box, whether circular or non-circular. This allows for easier communication between the tubes and the collecting compartment, which preferably must have a volume lower than that of the storage compartment. According to another characteristic of the invention, the longitudinal separation partition comprises two flat walls that form an angle with each other and that comprise, respectively, the first longitudinal edge and the second longitudinal edge. In such a way said longitudinal partition can be obtained easily by longitudinally folding a metal strip to form a kind of square. Advantageously, the angle formed between the two flat walls of the longitudinal partition is approximately equal to 90 °. This preferred embodiment of the longitudinal partition is particularly adapted for the case in which the tubular wall of the box has a circular cylindrical shape. It is also advantageous that the apex of the angle formed between the two flat walls of the longitudinal partition wall is located substantially in the center of the circular section of the tubular wall. As a result of this, the respective cross-sections of the collecting compartment and the storage compartment correspond substantially to a quarter and to three-quarters of the total cross-section of the tubular wall. According to another feature of the invention, the condenser comprises transverse partitions that extend into the collecting compartment. Advantageously, each transverse partition comprises a first part constituting the partition itself and corresponding to the cross section of the collecting compartment; and a second part that partially corresponds to the cross section of the storage compartment; said two parts forming an appropriate notch to mate with a corresponding notch, provided from the longitudinal edge of the longitudinal partition wall. Only the first part of the transverse partition constitutes the partition itself, that is, the useful part. The second part contributes, on the one hand, to limiting the aforementioned notch and, on the other hand, to maintaining the longitudinal partition inside the box. In this way, the transverse partitions are embedded immediately in the longitudinal partition, through the cooperation of their respective notches; then the assembly is axially threaded into the interior of the box. Said introduction is carried out in such a way that the first longitudinal edge of the longitudinal partition fits into a longitudinal slot of the wall of the wall. This conception guarantees that once the assembly has been inserted into the box, the longitudinal partition is correctly placed in its place, and the transverse partitions rest against the tubular wall of the box to form a plurality of chambers in the box. collector compartment and allow, subsequently, the circulation of a refrigerant fluid in various steps. According to another feature of the invention, the tubular wall of the box is obtained by rolling a metal strip so that it has two longitudinal edges that limit the longitudinal groove of the box. According to another characteristic feature of the invention, the longitudinal partition, as well as the transverse partitions, are metallic elements coated with a welding material. In the following description, which is given by way of example only, reference is made to the accompanying drawings, in which: Figure 1 is an elevational view of a condenser according to the invention; Figure 2 is a partial sectional view, on a larger scale, of the capacitor of Figure 1, which allows observing the structure of the box; Figure 3 is an end view of the longitudinal partition designed to equip the box of Figure 2; Figure 4 is a view similar to that of Figure 2, after placing the longitudinal partition of Figure 3; Figure 5 is an elevational view of a transverse partition intended to be inserted laterally into the longitudinal partition of Figure 3, and to be placed in the box of Figures 2 and 4; 6 is a side view, on a larger scale, of the longitudinal partition of FIG. 3; Figure 7 is an end view of the longitudinal partition equipped with the transverse partitions; Figure 8 is an elevation view of a capacitor similar to that of Figure 1; and Figure 9 is a sectional view, taken along line IX-IX of Figure 8. The condenser shown in Figure 1 comprises a bundle 10 formed by a plurality of flat tubes 12, between which are spacers 14 of generally wavy form, which constitute heat exchange fins. The bundle 10 is mounted in a tubular collector box 16 and a tubular box 18. The collector box 16 and the tubular box 18 have a circular section and have axes parallel to each other. The collecting box 16 comprises an inlet pipe 20 and an outlet pipe 22 for a cooling fluid. The refrigerant fluid, in the form of the superheated vapor phase, is sent by means of a compressor (not shown) to the pipe 20. Said fluid is successively cooled or "distilled", then condensed to a hot liquid phase, then "subcooled" to a cold liquid phase, before leaving the condenser by means of the outlet pipe 22. Reference is now made more particularly to Figures 2 and 4 to describe the structure of the tubular box 18. The box 18 comprises a tubular wall 24 having a cylindrical shape of revolution about an axis XX, and therefore, a circular cross section whose center passes along the axis XX. The wall 24 is obtained by rolling a metal strip, for example, of aluminum or aluminum alloy, so as to provide two longitudinal edges 26 and 28 which delimit a longitudinal groove 30 extending parallel to the generatrices of each other. the wall 24 and having a width L (figure 2). The box 18 is intended to internally receive a longitudinal separating partition 32, which is only shown in FIG. 3. Said longitudinal partition is obtained by folding a metal strip so as to form two flat walls 34 and 36 which form one another. angle fl which, in the example, is substantially equal to 90 °. The walls 34 and 36 are joined to each other by means of a rounding 38. It is obtained as a result that the angle fl has a virtual vertex S. In addition, the walls 34 and 36 respectively comprise a first longitudinal edge 40 and a second longitudinal edge 42 The wall 34 comprises at least two communication holes 34, only one of which is visible in figure 3. The partition 32 has a thickness E slightly smaller than the width L of the slot 30. The partition 32 is intended for to be introduced into the interior of the tubular wall 24, in such a way that the longitudinal edge 40 is engaged in the slot 30, and that the longitudinal edge 42 rests against the inside of the tubular wall 24, as seen in the figure 4. The separating partition 32 then limits in the box 18 a collecting compartment 46 and a storage compartment 48. In the configuration shown, the vertex S of the transverse partition is close to the axis XX . As a result, the transvereal section of the collecting compartment 46 and that of the storage compartment 48 correspond, respectively, to a fourth part and to three quarters of the total transvereal section of the tubular wall 24. It is advantageous that the Storage compartment occupies more than half of the total volume of the box. As shown in figures 2 and 4, the tubes 12 have ends 50 which are inserted into elongated holes 52, provided in the thickness of the tubular wall 24, and in the region corresponding to the collecting compartment 46. The tubes 12 +? ene e is respective YY extending in a non-radial direction relative to the center of the circular section of the wall 24, and in such a manner, facilitate a better implanting of the tubes, taking into account the configuration of the collecting compartment 46. The compartments 46 and 48 communicate with each other by means of of holes 44, previously mentioned. The box 18 further comprises several transverse partitions 54, as shown in Figure 5. These partitions here have the shape of a sector of a circle, limited by a circular edge 56 with a radius adapted to the inner radius of the tubular wall 24. , and that extends to three quarters of a circumference. This partition is further limited by two radial edges 58 and 60 that form a right angle together. The partition 54 comprises a first part 62 that extends in a quarter of the circumference to a notch 64, and a second part 66 that extends in a semicircle between the notch 64 and the edge 58. The part 62 has an adapted shape to that of the transvereal section of the collecting compartment 46 and thus constitutes the partition itself, or the useful part thereof. Contrarily, the part 66 is intended to be supported against the tubular wall 24, without making the partition paper. As can be seen in figure 6, the longitudinal partition comprises a plurality of notches 68 which are intended to cooperate, each with a notch 54 of a transverse partition 54. In this way, the partition 54 can be inserted laterally onto the partition. longitudinal partition 32, so that the partitions 64 correspond respectively to the notches 68. When the embossing is carried out, an assembly is formed such as that shown in Figure 7. Said assembly can then be introduced into the interior of the the tubular wall 24, so that the longitudinal edge 40 of the longitudinal partition 32 is slidable in the slot 30, and the longitudinal edge 42 of the longitudinal partition 32 is automatically supported against the inside of the tubular wall 24. In this way, it is guaranteed that the longitudinal partition 32 and the transverse partitions 54 are perfectly in position. Once this operation has been carried out, it is then sufficient to insert the respective ends 50 of the tubes 12 into the holes 52 of the wall 24. The opposite ends of the tubes 12 can be introduced, in turn, into the appropriate holes comprising the wall of the collecting box 16. The condenser of figures 8 and 9 is similar to that of figure 1. The box 18 houses a longitudinal partition 32, provided with two communication holes 34 and two transverse partitions 54, and is closed by means of two end plates 70 and 72. The collection box 16 accommodates two transverse partitions 74 and 76 and is closed by two end plates 78 and 80. As a result, the cooling fluid can circulate in the condenser in several successive steps. The different parts that make up the condenser, mainly the box 18, the longitudinal partition 32 and the transverse partitions 54, are coated with a welding material. There is a result that after assembling the different elements that make up the condenser, it can be placed in an appropriate oven to carry out the welding operation. The invention thus makes it possible to obtain a condenser in which the reservoir and one of the collecting boxes are limited by a single box of compact structure and, therefore, the entire assembly can be obtained easily by means of welding. It is noted that the invention also allows solving the problem of putting transverse partitions in place, which usually requires delicate assembly operations. The condenser of the invention allows different types of circulation of the cooling fluid. Mainly, allows the refrigerant fluid to enter and leave the tank before being cooled in the condenser or also to leave the condenser before entering and leaving the tank. The invention is particularly intended for condensers of air conditioning systems for motor vehicles.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - Condenser for a cooling circuit run by a cooling fluid comprising a bundle of tubes with fins mounted between two collection boxes, and where one of the collector boxes communicates with a tank; characterized in that the collecting box (46) and the reservoir (48) are limited p > or a box (18), tubular wall (24), and divided by a longitudinal separation partition (32) to a collector compartment (46) in which the tubes (12) of the beam, and a compartment reservoir (48) communicating with the collecting compartment by means of the holes (44) provided in the longitudinal partition (32), and in that the longitudinal partition (32) comprises a first longitudinal edge (40), coupled in a longitudinal groove (30) of the tubular wall (24) of the box (18), and a second longitudinal edge (42), supported on the tubular wall f 24) of the box (18), to allow a welding connection between the box (18) and the longitudinal separation partition (32).

2.- Condenser in accordance with the claim 1, characterized in that the tubular wall (24) of the box (18) has a generally cylindrical shape.

3.- Condenser in accordance with the claim 2, further characterized in that the tubes (12) of the bundle (10) extend in a direction (Y-Y) non-radial with respect to the center (X-X) of the cylindrical section of the tubular wall (24).

4. Condenser according to any of claims 1 to 3, further characterized in that the longitudinal separation partition (32) comprises doe paredee planae (34, 36) forming an angle (A) to each other, and respectively comprise the first longitudinal edge (40) and the second longitudinal edge (42).

5. Capacitor according to claim 4, further characterized in that the angle (fl) formed between the two flat walls (34 and 36) of the longitudinal partition (32), is approximately equal to 90 °.

6. Condenser according to any of claims 2 and 5, taken in combination, characterized in that the vertex (S) of the angle (0) formed between the flat walls (34, 36) of the longitudinal separation partition (32) , is located substantially in the center (XX) of the circular section of the tubular wall (24), so that the respective cross sections of the collecting compartment (46) and the storage compartment (48) correspond substantially to the fourth part and to the fourth quarters of the total cross section of the tubular wall (24).

7. Condenser according to any of claims 1 to 6, further characterized in that it further comprises transverse partitions (54) that extend into the collector compartment (46).

8. - Condenser according to claim 7, further characterized in that each transvereal partition (54) comprises a first part (62) that constitutes the partition itself and corresponds to the cross section of the collector compartment (46), and a second part ( 66) that corresponds partially to the cross section of the storage compartment (48), these two parts constituting an appropriate notch (64) to be coupled to each other in a corresponding groove (68) provided from the second longitudinal edge (42) of the partition Longitudinal separation (32).

9. Condenser according to any of claims 1 to 8, further characterized in that the tubular wall (24) of the box (18) is obtained by rolling a metal strip, so that it has two parallel longitudinal edges (26, 28) that limit the longitudinal groove (30) of the box (18).

10. Condenser according to any of claims 1 to 9, characterized in that it is obtained by means of welding.