Serpentine heat exchanger

 

(57) Abstract:

The invention relates to heat-exchange technique and can be used in evaporators for refrigerating circuits. The method is designed to produce a serpentine heat exchanger, in particular an evaporator for refrigerating circuits, profiled so as to have a slope on the side of the projection relative to the at least one portion of its length, the direction of which suddenly or gradually reversed at least once with respect to a plane which is essentially parallel to one of the directions defined by the length of the heat exchanger. The method involves: obtaining design at least the coil or of the finished heat exchanger in a flat configuration; bending and/or forming or deformation of the flat coil or flat finished heat exchanger so as to provide the required slopes. 2 s and 5 C.p. f-crystals, 5 Il.

A method of obtaining a serpentine heat exchanger, in particular an evaporator for refrigerating circuits, and serpentine heat exchanger corresponding to the specified method.

The present invention relates to a method for producing a serpentine heat exchanger, casinostyle relative to at least part of its length, the direction which suddenly or gradually reversed at least once with respect to a plane which is essentially parallel to the General plane of the heat exchanger, in particular with respect to a plane essentially parallel to the main direction of air flow, which is a heat exchanger, relative to the essentially vertical or essentially horizontal plane.

This type of heat exchanger or evaporator is known, and such heat exchangers usually have a wavy or zig-zag profile. One such heat exchanger is described in British patent N 736155 and comprises a tubular element bent in a serpentine configuration, consisting of a number of essentially parallel tubular sections, many wire ties attached to each side of a serpentine configuration, and wire pass along the length of a serpentine configuration and is attached to its tubular sections, and the heat exchanger to provide a wavy or zigzag profile is bent in two places along destiny.

From a functional point of view, this type of heat exchanger ensures snaketail can increase the length of the coil while maintaining their overall sizes within certain limits.

In addition, the characteristic of the non-planar profile of the heat exchanger causes a turbulence of the air flow along the heat exchanger, thereby increasing the efficiency of heat transfer.

However, on the other hand, the manufacture of these wavy or zigzag heat exchangers is not as easy as conventional flat heat exchangers, and the lines for the installation of a conventional flat heat exchangers can be hardly used for the installation of heat exchangers wavy or zigzag profile without any changes to adapt to the new product. Thus, for the production of wavy or zigzag heat exchangers requires special line, so that the production cost is increased compared with the production of conventional flat heat exchangers.

The present invention is to provide a method (get heat exchanger of the above type), with which it becomes possible to eliminate the above drawback and which ensures low cost of production of heat exchangers wavy and/or zig-zag profile, higher-quality.

The present invention provides a solution videochannels fact, that involves bending the tube into a flat serpentine configuration, consisting of a number of essentially parallel tubular sections, joining many wire ties to each side of a flat serpentine configuration, and these wire along the length of the flat serpentine configuration and is attached to its specified tubular sections, and bending the flat serpentine configuration and wire ties attached to it, around the axis or axes, corresponding to one or more of these tubular sections.

Bending can be done in several ways when using bending machines or devices, stamps or other deforming tools.

When carrying out the present invention it can be embodied so that the flat serpentine configuration and a wire attached to it, bent around the axes of the respective rotating axes of these straight sections, and preferably, the wire attached to opposite sides of a serpentine configuration, were are staggered relative to each other.

the th or more tubular sections, means that the tube is subjected only to curl essentially around its own axis, and bent along a transverse axis that usually leads to weakening of the coil and to reduce the cross-section of the tube due to the squeezing of the tube at the point of bend.

The specific choice of the position of the lines of bending and location of wire connections in a checkerboard pattern provides a flexible heat exchanger from a flat configuration to a configuration having at least some of the inclined sections, avoiding any risk of separation of the wire connections from the coil, i.e. the destruction of the soldering points with a soft solder.

The above advantages are particularly evident in the case of a heat exchanger having a zig-zag profile, which has a different bend line.

The present invention relates also to the above-mentioned type of heat exchanger, which contains a bent tubular element in a serpentine configuration, consisting of a number of essentially parallel tubular sections, many wire ties attached to each side of a serpentine configuration, and these wire along the length of the serpentine konfiguracija and wire, attached to it, is curved around an axis or axes, corresponding to one or more of these tubular sections.

Preferably, the heat exchanger can have such a device to a serpentine configuration and a wire attached to it, were bent around the axes corresponding to different axes of these tubular sections to obtain a zigzag profile, profile of the teeth of a saw or irregular profile.

Preferably, the wire attached to opposite sides of a serpentine configuration, were located relative to each other in a checkerboard pattern.

Distinctive features of the present invention and derived from them the advantages will become more apparent from the following description of a preferred variant implementation, illustrated in the accompanying drawings, where:

Fig. 1 is a schematic representation of a refrigerator evaporator having a regular zig-zag profile corresponding to the present invention.

Fig. 2 is an isometric image of a flat evaporator of the first stage of the method corresponding to the present invention.

Fig. 4 is a schematic representation of a refrigerator evaporator having a toothed profile (the profile of the teeth of the saw).

Fig. 5 is a schematic representation of a refrigerator evaporator having an irregular profile polyline.

As shown in Fig. 1, the refrigerator 1 is installed so that his back was against the wall 2 rooms. Serpentine evaporator of the refrigeration circuit is mounted on the outer side of the rear surface of the refrigerator 1. Between the rear surface of the refrigerator 1 and the wall 2 rooms can be left period of the minimum value to form a vertical channel, which will be created spontaneously rising air stream, which flows around the evaporator and cools it.

The evaporator 30, which is a serpentine heat exchanger has a zig-zag lateral projection. This profile is a toothed profile with triangular teeth, which are isosceles and the same, but which can also be irregular and different from each other.

In Fig. 2 and 3 show two stages of the method of installation of such a heat exchanger.

In the second stage performs bending, forming or deformation of the flat heat exchanger 3 to receive a certain zig-zag profile.

For bending, forming or deformation of the flat heat exchanger to receive the bent element (as in the case shown in Fig. 1-3) having zigzagoon configuration, you can use any device to perform bending, forming or deformation.

As clearly shown in Fig. 2 and 3, it is preferable that the coil 103 of the heat exchanger 3 was oriented so that the parallel section 203 tubes were oriented perpendicular to the direction of air flow through the heat exchanger, in particular, essentially parallel to the lines of bending.

Preferably, the curve were selected near parallel sections 203 serpentine tube. In particular, the curve can be selected also perfectly aligned to the relevant sections 203 serpentine tube 103.

In this case, the serpentine tube is not subjected to bending in the direction perpendicular to its axis and coloradoguy twisting essentially around its axis and this kind of deformation eliminates the danger of any squeezing.

As a result, as also shown in Fig. 2, wire 303, which are mounted on the two opposite sides of the coil are staggered relative to the other on the opposite side.

This feature eliminates any grazing wire ties 303 each other during bending of the heat exchanger 3 from its flat configuration to a curved.

The bending angle of the inclined sections depends on various materials and type of construction of the heat exchanger and can be determined by calculation.

As shown in Fig. 4 and 5, the configuration of the heat exchanger, which may be obtained in a manner consistent with the present invention is not limited to regular zigzag profile.

Depending on the distances between sections 203 serpentine tube 103, which is parallel to the lines of bending, you can also obtain the heat exchangers having a toothed profile or profile corresponding to the broken line irregular shape.

In this latter case, you can get a coil having different distances between two adjacent sections 203 serpentine tube. This allows to obtain a very large number of different irregular or combiner is ecchi 203 serpentine tube 103 are oriented perpendicular to the direction of air flow, passing through the heat exchanger 3.

1. A method of obtaining a serpentine heat exchanger (3), in particular an evaporator for refrigerating circuits, profiled so as to have a slope on the side of the projection relative to the at least one portion of its length, the direction of which suddenly or gradually changed to reverse at least once with respect to a plane which is essentially parallel to the General plane of the heat exchanger (3), characterized in that it provides for bending the tube into a flat serpentine configuration (103), consisting of a number of essentially parallel tubular sections (203), fixing many wire ties (303) to each side of a flat serpentine configuration (103), and specified wire (303) along the length of the flat serpentine configuration (103) and connected to its specified tubular sections (203), and bending the flat serpentine configuration (103) and wire ties (303) attached to it, around the axis or axes, corresponding to one or more of these tubular sections (203).

2. The method according to p. 1, in which the specified flat serpentine configuration (103) and wire (303) joined CLASS="ptx2">

3. The method according to p. 1 or 2, in which the wire connection (303) attached to opposite sides of the flat serpentine configuration (103) are located relative to each other in a checkerboard pattern.

4. Serpentine heat exchanger (3), in particular an evaporator for refrigerating circuits, profiled so as to have a slope on the side of the projection relative to at least part of its length, the direction of which suddenly or gradually reversed at least once with respect to a plane which is essentially parallel to the General plane of the heat exchanger (3), containing the bent tubular element in a serpentine configuration (103), consisting of a number of essentially parallel tubular sections (203) lots of wire ties (303) attached to each side of the serpentine configuration (103), moreover, these wire ties (303) along the length of the serpentine configuration (103) and connected to its specified tubular sections (203), wherein the serpentine configuration (103) and wire (303) attached to it, is curved around an axis or axes, corresponding to one or more of these tubular sections (203).

5.zi (303), attached to it, bent around the axes of the respective rotating axes of these tubular sections (203).

6. Serpentine heat exchanger (3) p. 4, in which the specified flat serpentine configuration (103) and wire (303) attached to it, bent around the axes corresponding to different axes of these tubular sections (203) for receiving a zigzag profile, profile of the saw tooth or irregular profile.

7. Serpentine heat exchanger (3) PP.4 to 6, in which the wire connection (303) attached to opposite sides of the flat serpentine configuration (103) are located relative to each other in a checkerboard pattern.

 

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