RU2314463C2 - Tubular heat transfer module - Google Patents

Abstract

FIELD: heating engineering, particularly heat-exchanging and heat-transfer equipment, namely tubular heat transfer modules to be used in water residential building heating systems.

SUBSTANCE: tubular heat transfer module comprises shell and ribbed tubular heat transfer member arranged in the shell. The tubular heat transfer member includes at least one metal pipe and stack of plate-like ribs having washers inserted between the ribs to provide predetermined rib pitch defined by washer thickness. Each washer is made of aluminum and is shaped as rhomb elongated in vertical direction. The rhomb has smoothed corners defined by obtuse angles. The washers are connected to plate-like ribs. Shell has at least two coaxial orifices made in opposite vertical walls thereof. Each plate-like rib and each washer have at least one orifice to receive said pipe so that the pipe passes through orifices, is inserted in plate-like rib stack and connected to washers.

EFFECT: improved heat transfer from pipe to plate-like ribs along with simplified module production.

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Description

FIELD OF THE INVENTION

The invention relates to tubular heat transfer elements or sets of these elements with ribs to increase the heat transfer area located outside and across the pipe of the tubular element.

State of the art

Known tubular radiator, which contains a pipe installed in the holes of the fins, having flanging. In this case, the flanging in the base has a conical section forming ring pockets. Pockets of adjacent plates are interconnected by flanges made in flanging and filled with adhesive paint and varnish coating (AS USSR No. 1366852 A1, M. cl. F28F 1/40, published January 15, 1988 in Bull. No. 2).

Signs of a known radiator, coinciding with the features of the claimed invention, are the presence of a pipe and fins with holes in which the said pipe is installed and which is fastened to the fins.

The reason that prevents obtaining a technical result in a known technical solution, which is provided by the invention, is the use of flanging for fastening the fins with a pipe made with a conical section, the incomplete use of the heat transferring external surface, the use of adhesive paint filling of gaps having low heat transfer properties, in the absence of a casing of the heat exchange module.

The closest analogue (prototype) is a heat transfer element consisting of a metal pipe and a package of fins, each of which has a central hole with a flanged around the perimeter edge, and the pipe is inserted into the package of plates and fastened with it to ensure a given step between the plates along the pipe. In this case, the extreme plates of the package and the pipe are fastened with welded joints, and the intermediate plates and the pipe are fastened with soldered joints, forming a brazed-welded joint of the pipe and the package of plates. In addition, the finning plates have at least two cut and bent perpendicular to the plane of the tooth plate to a height corresponding to the distance between the plates in the package (Patent RU No. 2067737 C1, M. CL F28F 1/24, F28F 1/36).

Signs of a known radiator that coincide with the features of the claimed invention are the presence of a pipe and a package of finning plates, each of which has a central hole, and the pipe is inserted into the plate package and fastened with it while ensuring a predetermined step between the plates along the pipe.

The reason that prevents the obtaining in a known technical solution of a technical result, which is provided by the invention, is to use flanging to fasten the fins to the pipe; in the use of at least two teeth cut out and bent perpendicular to the plane of the plate of the teeth to a height corresponding to the distance between the plates in the bag, to ensure a given step between the plates, in the incomplete use of the heat-transferring outer surface of the pipe, in the absence of a casing of the heat exchange module.

Disclosure of invention

The problem to which the invention is directed, is to increase the heat transfer from the pipe to the plates while simplifying the manufacturing technology of the tubular heat transfer module, consisting of a casing, inside which is placed a tubular heat transfer element.

The technical result that mediates the solution of this problem lies in the triple functional purpose of the washers. Each washer, on the one hand, performs the function of an element providing a predetermined step between the plates (which eliminates the need to perform special teeth and flanges in the plates that complicate the technology of manufacturing the plates), on the other hand, performs the function of an element that transfers heat from the pipe to the plates. The heat transfer from the pipe to the plates through the washer increases the efficiency of this transfer due to the larger area of this heat transfer, as well as due to the ability to use aluminum washers with (due to the material) higher thermal conductivity. On the third hand, the washer has a configuration that improves the aerodynamic characteristics of the convective air flow around the pipe. The technical result also lies in the fact that the multifunctional casing of the module protects against mechanical damage the main details of the heat exchange element (fins made of sheet metal, washers between them), forms a vertical channel for convective air movement (provides a "fireplace effect"), serves as an important element in the design of the finished product , simplifies the manufacturing technology of the module by dividing the full technological cycle into two main components, the first of which is the manufacture of a heat exchange module, and the second Single - overmolding necessary number of modules to the tube (assembly of the finished product).

The technical result is achieved in that the tubular heat transfer module comprises a casing and a tubular heat transfer element with fins located in the casing, which includes at least one metal pipe and a package of fins plates with washers located between the plates and providing a predetermined pitch between the plates, determined by the thickness of the washer, when In this case, each washer is made of aluminum, has the shape of a vertically elongated rhombus with smooth obtuse angles and is fastened with finning plates, the casing is in its bying vertical walls has at least two coaxial openings, and each plate orebryayuschaya and each washer has at least one opening for placement of said tube which is inserted through said opening in the housing located inside the package orebryayuschih plates and washers and is fastened with washers.

New features of the claimed technical solution are the presence of washers located between the fins, while the washers, on the one hand, are fastened to the pipe, and on the other hand, to the indicated plates, as well as the presence of a multifunctional casing, which forms heat transfer together with the casing located inside the casing element heat transfer module.

Brief Description of the Drawings

Figure 1 shows a tubular heat transfer module in longitudinal section (as part of a heating battery); figure 2 separately shows the fins plate from the side of its plane, rotated 90 °; figure 3 separately shows the washer from the side of its plane, rotated 90 °; figure 4 in a perspective view shows a heating battery consisting of several tubular heat transfer modules.

The implementation of the invention

The tubular heat transfer module includes a casing 14 and a tubular heat transfer element with fins located in the casing (1-13). Moreover, the height of the casing exceeds the height of the heat transfer element, which is located in the lower part of the casing.

The tubular heat transfer element with fins contains at least one, and in a preferred embodiment, two horizontally arranged steel pipes - upper 1 and lower 2 - and a package of fins plates 3 with washers 10 located between these plates and providing a predetermined pitch between the plates determined by the thickness of the washer. Each fins plate 3 is made in the form of a rectangular metal sheet (steel or aluminum), elongated in the vertical direction and having openings 4 and 5 for placement of the corresponding pipes 1, 2 and four openings 6, 7, 8 and 9 for fastening the plates into the bag . Each washer 10 is made of aluminum and has the shape of a vertically elongated rhombus with smooth obtuse angles. This form of the washer contributes to the formation of the laminar movement of heated air between the plates 3 of the package, thereby eliminating the occurrence of stagnant zones. Moreover, each washer 10 has one hole 11 for placing pipes 1 or 2 in it and two holes 12 and 13 for fastening them in a package with the said plates 3. The plates 3 and the washers 10 located between them are connected to the package using four rods (not shown), which are threaded through the corresponding coaxial holes 6, 7, 8 and 9 of the plate 3 of the package and the corresponding coaxial holes 12 and 13 of the washers 10 of the package. Using these rods, the plates 3 and the washers 10 of the bag are compressed in the axial direction so as to provide the necessary fastening of the plates 3 and the washers 10 into a single bag to provide the necessary thermal contact between them in the bag and to provide the necessary structural rigidity. In addition, steel pipes 1 and 2 are inserted into the coaxial holes 4 and 5 of the plates 3 and the coaxial holes 11 of the respective washers 10, which are rigidly fastened to the washers by deforming them in the radial direction. Thus formed package of fins plates 3 with washers 10 is located in the casing 14, which in its opposite vertical walls has two pairs of coaxial openings for accommodating the pipes 1 and 2. In this case, the casing 14 is made in the form of a vertically elongated parallelepiped with an open top and bottom ends for air passage. The casing 14 with the pipes 1, 2 located therein and a package of fins plates 3 with washers 10 form a separate tubular heat transfer module. Moreover, this module can be connected to other same modules based on one pair of pipes 1 and 2 by means of washers 15 to form a heating battery (Figs. 1, 4).

One of the technological methods for manufacturing a module can be the replacement of a set of washers between the plates within the same module by a single aluminum casting process. In this case, the plates 3 are placed in special grooves of the mold to ensure a given step between the plates, and the configuration (section) of the casting corresponds to the configuration of the washer from the side of its plane (Fig. 3), and the aluminum body cast in this way must have at least one central hole to place the pipe in it.

The operation of the tubular heat transfer module is as follows.

When heated water moves through pipes 1 and 2, heat from the pipe walls is transmitted through aluminum washers to 10 plates 3 of the plate package. As a result, the air located between the plates inside the casing 14 is heated, rises, flows around the washers 10 and leaves the casing 14 outside through the open upper end of the casing. At the same time, cold air enters its place through the lower open end of the casing 14, which then heats up and also rises. Thus, continuous heating of the air inside the casing 14 and continuous movement of air through the casing 14 from the bottom to the top are carried out, thereby providing convective heating of the air in the room in which the battery of the proposed tubular heat transfer modules is installed. In this case, the washers have minimal resistance to air movement due to their diamond-shaped shape with rounded obtuse angles.

Claims (1)

A tubular heat transfer module comprising a casing and a tubular heat transfer element with fins located in the casing, which includes at least one metal pipe and a package of finning plates with washers located between the plates and providing a predetermined step between the plates, determined by the thickness of the washer, each washer made of aluminum, has the shape of a vertically elongated rhombus with smooth obtuse angles and is bonded with fins, the casing in its opposite vertical walls has as at least two coaxial holes, and each fin plate and each washer have at least one hole for accommodating said pipe, which through these holes is inserted into the package of fin plates with washers placed inside the casing and fastened with washers.

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