CS74491A2 - Plate condenser for cooling machine especially for household refrigerator - Google Patents

Description

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Plate capacitor for refrigeration machine, especially for household cooler

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate condenser for a refrigeration machine, in particular for a household refrigerator, with a sheet metal plate, in particular of aluminum, on which one of a metal tube, in particular aluminum, is bent and tubed. on the side, a black coating is preferably provided.

Background Art

Here, the refrigerator is understood to mean a device placed permanently on one place or a movable device for cooling a closed space or for cooling solid, liquid or gas objects placed in a refrigerator to a predetermined temperature which is lower than the ambient temperature. To this end, heat must be removed from said articles and then passed to the surroundings. A plate condenser is used to transfer heat to the surroundings, and the heat transfer is carried out by the refrigerant / freon which circulates in the tubular condenser conduit.

The essential components of the plate condenser are the sheet metal plate or the sheet metal plate and the serpentine tube guide fixed to one of the wide side sides of the sheet metal plate. The purpose of the sheet plate is to improve the heat transfer between the tube sheet and the surroundings. For this reason, a good heat transfer through the tubing and the sheet metal plate and the metal plate is required. In known plate capacitors, the tubing of the plate is soldered or glued. Due to the above-described heat transfer, soldering is advantageous because the solder is typically a good heat conductor and a sufficiently large metal connecting cross-section is produced during soldering to provide a good heat transfer. However, soldering is labor-intensive and materially expensive and makes the entire product more expensive. In addition, brazing by means of heat supply can cause deformation and stress in the plate capacitor, which is undesirable. When using an adhesive, it is to be understood that the adhesive is a poor heat conductor and heat transfer bonding site thereby preventing it from being discharged. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide, by simple means, a plate condenser in which a good heat transfer through the tubular conduit and the sheet metal plate is guaranteed, and the assembly of the tube fitting on the sheet metal plate is simple.

SUMMARY OF THE INVENTION

This object is achieved by a plate condenser for a refrigerating machine, in particular for a household refrigerator, with a sheet metal plate, in particular of aluminum, on which one of the tubes, made of metal, in particular aluminum, is bent and hinged. On the other hand, a black coating according to the invention is preferably provided with a groove on the side of the metal plate facing the tubular conduit, the passage of which corresponds to the shape of the tubular conduit and which corresponds to the shape and size of the surface of the tubular conduit facing. and that the tubular conduit is held in the groove and on the sheet metal plate by retaining clips. In the plate capacitor according to the invention, the tubular guide is held on the sheet metal plate by means of retaining clips in the form of retaining tongues in a form-fitting manner, wherein the retaining tongues of the tube guide overlap and press them to the sheet metal plate in close contact therewith. In this case, the conduit is arranged in a groove in a sheet metal plate extruded, the course and shape and size of which are adapted to the pipe conduit such that the conduit in its position, inserted into the groove, rests flat with its surface facing the sheet metal on the surface of the groove formed . Thereby a large contact between the pipe and the sheet metal is achieved, and therefore a large heat transfer, although there is no metal connection between the pipe guide and the plate, such as in the case of a brazed joint. According to the invention, the attachment can also be made inexpensively and simply because the groove as well as the respective retaining clips can be formed simply and quickly by a suitable pressing or bending tool as molded / bent parts, the retaining clips being in a position in which they extend over the pipe guide fasten to a sheet metal plate, such as screws and the like.

According to a preferred embodiment, the retaining clips are designed as one-piece tongues with a sheet metal plate by means of a suitable pressing / bending tool such that they are punched, folded up and the pipe guide is folded after insertion of the pipe guide into the groove. Since these holding tongues are made with a one-piece sheet metal plate, there is no need for additional attachment parts, which is another advantage of the invention.

Furthermore, the connection between the sheet metal plate and the pipe conduit of the plate capacitor according to the invention is also releasable. The tubular conduit can be removed from the sheet metal plate by peeling the retaining tongues up and can be replaced easily and quickly if one of the two parts is damaged.

According to a preferred embodiment, the retaining clips are each formed by a retaining tongue arranged adjacent to the groove and transversely, preferably perpendicular to it, which is bent upwardly, which embraces the tubular guide. The conduit can have a circular cross-section and the bottom of the groove is rounded. The retaining tabs are then bent around the tubular casing 4 so that they are tight. In doing so, they can embrace the tubing at an angle of about 180 °.

According to a further preferred embodiment, the cut-outs for the retaining tongues or the recesses bounded by the cut-outs are crossed or arranged on one and / or both sides thereof.

The tubular conduit is bent in a plane parallel to the metal plate and the plate plate groove extends at its edge, preferably on the same sheet metal edge at two adjacent locations.

The tubular conduit preferably has meandering curved loops, and each loop is secured by three retaining clips. In each case, a holding clip is provided in the central region of the side portion and the end loop of the loop. Furthermore, it is advantageous if the loops lie in a straight line behind each other, to which they extend transversely, and that a straight tubular piece is attached next to the row, fixed by two or three retaining pins spaced along its length.

The tubular piece preferably protrudes with its free end of the respective sheet metal edge, the other end of the tubular guide is bent perpendicular to this edge from the nearest lying side portion, which edge also protrudes and the parallel end of the free end is arranged, both ends being fixed at this edge. always with one retaining clip. The retaining tongues may be thinned by the pattern pressing and elongated in the longitudinal direction. List of drawings in the drawing

The invention will now be described in more detail with reference to the drawing, in which: Fig. 1 is a perspective view of a plate capacitor according to the invention; Fig. 2 is a detail X of Fig. 1; by mounting a pipe guide on a metal plate. EXAMPLES OF THE INVENTION

The plate condenser 7 consists of a sheet of sheet metal, a rectangular or square sheet metal sheet 2, on one wide surface of which, on the upper wide side surface 2 of FIG. . A heat transfer black support coating is provided on the second wide side surface of the sheet metal 2 facing away from the pipe line 5. The sheet metal plate 2 and the tube 2 are made of aluminum or its alloy.

The gloss capacitor 7 is intended for household refrigerators being mounted mounted on the rear wall of the refrigerator in a vertical position, wherein the wide side surface 3 of the plate condenser I carrying the tubular conduit 5 is facing the refrigerator while the wide side surface carrying the black coating is away from the cooler. On the other hand, the sheet metal plate 2 in FIG. 1 is shown as lying on its rear wide side surface, so that the front wide side surface 2 supports the tubular conduit 5 above.

The rectangular sheet metal plate 2 has four edges 6, 7a, 7b and 8. In the upright functional position of the sheet metal plate 2, the edge 6 is a water-level lower edge, the edges 7a and 7b are the vertical side edges of the edge 8 by a horizontal upper edge. The tubular conduit 2 comprises a straight pipe piece 5a extending parallel and proximate to the edge 7b to the proximity of the edge 8, where at right angles to the opposing edge 7a and continues through the meandering-6 loops 2 up to the edge 6. Loops 9 each consist of horizontal horizontal spaced apart lateral portions 11 and one end elbow 12 which, in the longitudinal direction of the tubular conduit 5, connect the respective side portions 11 to each other. The tubular piece 5a protrudes with its straight free end 13 at the edge 6. The other end 14 of the tubular conduit 5 is bent out from the side portion 11 closest to the edge 6 in a right-angled direction 6 and also protrudes this edge 6, being parallel to the free end 13 and close to him. In the wide side surface 13, a groove 15 is embossed in the form of a bore, the course of which is adapted to the shape of the course of the pipe bending 2 and whose bottom 16 is adapted to the circumferential shape of the pipe guide 2. In the exemplary embodiment, the pipe guide 2 has a circular cross-section and a groove bottom 16 15 also has a circular cross-section corresponding to the cross-section of the conduit, i.e. the radius of the conduit and the bottom 16 of the groove 15 are the same. The depth of the groove 15 is equal to or less than half the outer diameter of the tubular conduit 2. On the basis of such a design, the tubular conduit 2 is coaxial to its bottom 16 of the groove 15, thereby creating a large contact contact.

The conduit 2 is held in its groove 15 in its inserted position 16 on its bottom 16 and on the sheet metal plate 2 by holding clips 17. Each loop 9 is held by three retaining clips 17, one holding clip 17 being arranged in the central region of the side portions 11 and the end arches. The pipe piece 5a is held by three retaining clips 17 spaced along its length. The end 14 arranged next to the free end 13 of the pipe piece 5a is held close to the bottom edge 6 by one retaining clip 17. The retaining clips 17 are in the example shown as retaining tongues 19 made as a one-to-one piece with a sheet metal plate before fitting into the sheet metal 2, they cut and bend approximately perpendicularly upwardly against the side of the sheet metal 2 on which the pipe line 5 is to be arranged. The holding tongues 19 are arranged inwardly or outwardly of the groove 15 with respect to the loops 9. They can also be arranged alternately in the longitudinal direction of the groove 15 &apos; The attachment points of the holding tongues 19t or their folding lines 19 are arranged so that the holding tongues 19 are bent. the tube pipe 5 inserted into the groove 15 contacts or has a small distance therefrom.

A pipe guide 5 is inserted into the groove 15 on the sheet metal 2 thus prepared, whereupon the holding tongues 19 are folded over the pipe guide 5 so that the pipe guide 5 embraces and thereby holds them in contact with the bottom surface 16. The length of the retaining tongues 19 is such that the tubular guides 5 are preferably encircled at an angle of about 180 ° and are in contact with the casing surface of the tubular conduit 5 during the movement, thereby obtaining a curvature corresponding to its curvature. The retaining tabs 19 are preferably cut from the sheet plate 2 by a U-shaped punch, whose arms are folded across the groove 15. This preferably results in a rectangular shape of the holding tongues 19. After the holding tongues 19 have been deflected, recesses 21 are formed in the region of the cut-out. Advantageously, the openings are arranged so as to cross the groove 15. This is advantageous because the openings formed by the recesses 21 are completely covered in the assembled position by the pipe line 5 'or by the holding tongues 19.

The described embodiment can be manufactured in a simple and inexpensive manner, since the extrusion of the groove 15 can be carried out with a suitable tool quickly and easily. Also, the retaining tongues 19 can be easily, quickly and conveniently operated in a suitable pressing / bending tool. After insertion of the conduit 5 - 8 - of the groove 15, it is only necessary to fold the retaining tongues 19, which can be carried out in a convenient manner simultaneously and simultaneously by a suitable tool. By applying the pipe guide 5 to the bottom surface 16 of the groove 15, a large area contact is formed between these parts. Therefore, in the operation of the plate condenser, due to the conduction of the heat, it is transmitted to the plate. To this end, the retaining tongues 19, which are integral with the sheet metal plate 2, also contribute to the pipe guide 5, which are flat on the surface. The heat transfer also occurs with this flat contact of the retaining clips 17 between the pipe 5 and the metal plate 2. It is advantageous to press the retaining clips 17 in their longitudinal direction by pressing with a certain pattern, so that their length is larger than the length of the cuts. In this way, the retaining tongues 19 gain greater strength and, in addition, the cuts can be shorter. In the embodiment described, the cut-outs or the cut-outs 21 intersect the groove 15, which is thus interrupted by the recesses 21. However, it is also possible to make these cuts or recesses 21 adjacent to them, next to the longitudinal groove 15, so that the groove 15 is not interrupted.

Claims (13)

A plate condenser for a refrigerating machine, in particular a household refrigerator, with a sheet metal plate, in particular of aluminum, on which a serpentine tubular conduit of metal, in particular of aluminum, is arranged and fixed on the other side and is preferably provided on the other side. a black coating, characterized in that a flange (15) is displaced on the side of the sheet metal plate (2) facing the tubular conduit (5), the course of which corresponds to the shape of the pipe conduit (5) and the bottom (16) corresponds to the shape and size of the conduit and that the tubular guide (5) is held in the groove (15) and on the sheet metal plate (2) by the retaining clips (17). 2. A plate capacitor according to claim 1, characterized in that the retaining clips (17) are each formed by a holding tongue (19) cut into the sheet metal plate (2) in a cross-section, preferably perpendicularly, to the groove (15). , wherein the retaining tongue (19) preferably supports the tubular guide (5). 3. A plate condenser according to claim 1, wherein the tubular conduit has a circular cross-section and the bottom surface of the groove is circular in cross-section according to the circumferential rounding of the conduit. 4. A plate capacitor according to claim 2 or 3, wherein the holding tongues (19) are curved in accordance with the jacket surface of the tubular conduit (5) and abut against it. 10 5. A plate capacitor according to claim 4, characterized in that the holding tongues (19) engage the tubular guide (5) at an angle of about 180 °. 6. A plate capacitor according to claim 4, characterized in that the cutouts for the holding tongues (19) or the recesses (21) defined by the grooves (15) or crosses are arranged on one and / or both sides of the groove (15). 15 / next to him. A plate capacitor according to one or more of claims 1 to 6, characterized in that the tubular conduit (5) is bent in a plane parallel to the sheet metal plate (2) up to the plate (15) extending from the sheet metal plate (2) at its edge, with preferably on the same edge (6) of the sheet metal plate (2) in two adjacent locations. A plate capacitor according to one or more of claims 1 to 7, characterized in that the tubular conduit (5) has meandering curves (9) and each loop (9) is fixed by three retaining clips (17). 9. A plate capacitor according to claim 8, characterized in that a one-holding clip (17) is provided in the central region of the side portion (11) and the end-of-loop (12) of the loop (9). - 9 - PATENT CLAIMS 10. The plate capacitor according to claim 8 or 9, characterized in that the loop (9) is arranged one behind the other in a straight line to which it extends transversely and that a straight pipe piece (5a) is placed next to the row. fastened by two or three retaining clips (17) spaced along its length. 11. A plate capacitor according to claim 10, wherein the tubular piece (5a) extends over the respective edge (6) of the sheet metal plate (2) with its free end (13) so that the second tube (14) of the tube conduit (5) is bent perpendicularly to this edge (6) from the closest side portion (11) of the loop (9), and this edge (6) also protrudes and is arranged parallel to the free end (13), both ends (13, 14) are attached to the edge (6) by one holding clip (17). - 12 Annotation Plate capacitor for refrigeration machine, especially for household refrigerator / fig. 1 / A plate capacitor is intended for a refrigerating machine, in particular a household refrigerator, consisting of a sheet metal plate (2), in particular of aluminum, on which one of a metal tube, in particular aluminum, is arranged and hinged in a curved tube (5). and on the other side, a black coating is preferably provided. In order to ensure a good heat transfer between the pipe (5) and the sheet metal plate (2) and to facilitate the installation of the pipe line (5) on the sheet metal plate (2), the pipe line (5) faces the sheet metal side (2). / a groove (15) is extruded, the course of which corresponds to the shape of the distribution of the pipe (5) and whose bottom (16) corresponds to the shape and size of the pipe (5), and the pipe (5) is in the groove (15) and on the metal sheet (2) / held by retaining clips (17). A plate capacitor according to one or more of claims 2 to 11, characterized in that the holding tongues (19) are thinned by the pattern pressing in the thickness and elongated in the longitudinal direction. -13- List of reference plates plate capacitor 1plate plate 2wide side surface 3cool snake 4pipe line 5pipe piece 5floor 6floor 7a, 7floor 8floor 9floor part 11floor elbow 12floor 14floor 15floor 16floorholdingholder 17holding tongue 19floorline