EP4177557A1 - Heat transfer device - Google Patents

Abstract

The invention relates to a heat transfer device, comprising a first flow guide (1) for a first fluid and a second flow guide (2) for a second fluid which is in heat-transferring contact with the first, the first flow guide (1) having a plurality of parallel flow guides , the first fluid has line sections (1.1) that conduct vertically, the second flow guide (2) surrounding the line sections (1.1) and having a space (2.1) that conducts the second fluid vertically, with a first distribution device (3.1) for supplying the first fluid to the line sections (1.1) and a second distribution device (3.2) for discharging the first fluid from the line sections (1.1) is provided, with a plurality of flow openings (3.1, 3.2) connected to the space (2.1) being provided 3.3) are provided for the second fluid, the distribution devices (3.1, 3.2) being disc-shaped. According to the invention, the line sections (1.1) have a rectangular internal flow cross section.

Description

The invention relates to a heat transfer device according to the preamble of patent claim 1.

A heat transfer device of the type mentioned is generally known (see, for example, https://www.zpm-systeme.de/wp-content/uploads/2017/04/beanleitung_waerme-tauscher_manual_heat_exchangers.pdf - there page 13). Such a heat transfer device consists of a first flow guide for a first fluid and a second flow guide for a second fluid which is in heat-transferring contact with the first, the first flow guide having a large number of line sections which are arranged parallel to one another and conduct the first fluid vertically, the second flow guide has a space surrounding the line pieces and vertically conducting the second fluid, a first distribution device being provided for supplying the first fluid to the line pieces and a second distribution device for removing the first fluid from the line pieces. Here and also in the following, the term “fluid” is to be understood as meaning an optionally gaseous or liquid medium. In the aforementioned solution, both fluids are one liquid.

A heat transfer device according to the preamble of claim 1 is from document U.S. 4,235,281A known.

The object of the invention is to improve a heat transfer device of the type mentioned at the outset.

In particular, a heat transfer device that works particularly efficiently in terms of heat technology and is easy to produce is to be created.

This object is achieved with a heat transfer device of the type mentioned by the features listed in the characterizing part of patent claim 1.

According to the invention, it is therefore provided that the line sections have a rectangular internal flow cross section.

In other words, the solution according to the invention is characterized, which will be explained in more detail below, in that the cross section through which both fluids flow is optimally utilized.

Other advantageous developments of the heat transfer device according to the invention result from the dependent patent claims.

For the sake of completeness, we will refer to the document DE 835 612 B pointed out.

The heat transfer device according to the invention, including its advantageous developments according to the dependent patent claims, is explained in more detail below with reference to the graphic representation of a preferred exemplary embodiment.

Figur 1

teilweise schematisch die Wärmeübertragungsvorrichtung mit Durchströmöffnungen für das zweite Fluid;

Figur 2

eine zweiteilig ausgebildete Verteileinrichtung für die Wärmeübertragungsvorrichtung gemäß Figur 1;

Figur 3

ein vertikales Leitungsstück für das erste Fluid gemäß Figur 1 mit Wärmeübertragungsrippen und Querrippen; und

Figur 4

als Explosionsdarstellung das Leitungsstück gemäß Figur 3 senkrecht oberhalb der Verteileinrichtung kurz vor dem Einstecken.

It shows in perspective

figure 1

partially schematically the heat transfer device with throughflow openings for the second fluid;

figure 2

according to a two-part distribution device for the heat transfer device figure 1 ;

figure 3

according to a vertical line section for the first fluid figure 1 with heat transfer fins and transverse fins; and

figure 4

as an exploded view the line section according to figure 3 vertically above the distribution device shortly before plugging in.

The heat transfer device shown in the figures initially consists, in a known manner, of a first flow guide 1 for a first fluid and a second flow guide 2 for a second fluid, which is in heat-transferring contact with the first, the first flow guide 1 having a plurality of mutually parallel, line pieces 1.1 that conduct the first fluid vertically, with the second flow guide 2 having a space 2.1 that bypasses line pieces 1.1 and conducts the second fluid vertically, with a first distribution device 3.1 for supplying the first fluid to the line pieces 1.1 and a second distribution device 3.2 for discharge of the first fluid is provided by the line sections 1.1, with a plurality of flow openings 3.3 connected to the space 2.1 being provided for the second fluid on the two distribution devices 3.1, 3.2.

What is essential for the heat transfer device according to the invention is that the line sections 1.1 have a rectangular internal flow cross section. There are within the rectangular internal flow cross-section of the line pieces 1.1 preferably transverse ribs 1.1.2 arranged, see figure 3 .

Furthermore, it is preferred that the distribution devices 3.1, 3.2 (here and in the following: both, in principle, as claimed: "at least one"), seen in the main flow direction of the second fluid, are many times shorter, at least a factor of 4, than in the direction of extension in one Plane are formed perpendicular to the main flow direction of the second fluid. In addition, it is preferred that the distribution devices 3.1, 3.2 have a multiplicity of distribution channels 3.4 for the first fluid. The through-flow openings 3.3 and the distribution channels 3.4 are preferably arranged alternately with one another. It is also preferred that the through-flow openings 3.3 and/or the distribution channels 3.4 are optionally arranged along the circumference of imaginary rectangles, in particular squares, arranged concentrically to one another.

Furthermore, it is preferred that the distribution devices 3.1, 3.2 are designed in two parts. The distribution devices 3.1, 3.2 are preferably formed from a base body 3.5 delimiting the distribution channels 3.4 on at least three sides and a cover element 3.6 delimiting the distribution channels 3.4 on one side, see FIG figure 2 . It is also provided that the distribution devices 3.1, 3.2 are disk-shaped (see: https://de.wikipedia.org/w/index.php?title=Scheibe&oldid=212958815), in particular circular disk-shaped. Furthermore, it is preferred that the distribution devices 3.1, 3.2 each have webs on their mutually facing sides for delimiting an insertion opening for the line pieces 1.1. In addition, it is preferred that each flow opening 3.3 has at least two parallel wall sections 3.3.1, 3.3.2, see figure 4 . In addition, it is preferably provided that longer sides of the rectangular internal flow cross-sections are designed to run parallel to the (aforementioned) wall sections 3.3.1, 3.3.2 of a through-flow opening 3.3.

In addition, it is preferable for the line sections 1.1 to be designed so that they can be inserted into the two distribution devices 3.1, 3.2, preferably their base body 3.5, for installation. In addition, it is preferred that the line sections 1.1 are produced as extruded profiles. It is also preferred that the line pieces 1.1 preferably have vertically extending heat transfer ribs 1.1.1 on a side facing the second flow guide 2, the outer cross section of the line pieces 1.1 preferably and in principle, i.e. without the heat transfer ribs 1.1.1 being considered - as well as the flow inner cross sections - is rectangular.

Furthermore, it is preferred that the first distribution device 3.1 is optionally arranged below the second distribution device 3.2 when used as an evaporator in heating mode or above the second distribution device 3.2 when used as a condenser in cooling mode when the heat transfer device is used as intended. In addition, it is preferable for the first fluid to flow in a first main flow direction through the line pieces 1.1 and for the second fluid to flow in a second main flow direction, opposite to the first, through the conductive space 2.1. It is preferred that the heat transfer device has a first supply and a first discharge connection for the first fluid, through which the first fluid is supplied perpendicularly to the first main flow direction of the first distribution device 3.1 or from the second distribution device 3.2 is discharged. In addition, it is preferred that the heat transfer device has a second supply and a second discharge connection for the second fluid, through which the second fluid is fed parallel to the second main flow direction of the second flow guide 2 and discharged from it.

In addition, it is preferred that the first fluid is optionally all liquid or mixed liquid and gaseous. It is preferred that the first fluid is a refrigerant for a thermodynamic cycle. Furthermore, it is preferred that the second fluid is gaseous, preferably air.

Furthermore, it is preferred that the line sections 1.1 are soldered at both ends to a distribution device 3.1, 3.2 in the heating furnace. As a result, the assembly of the heat transfer device can be carried out in a simple manner and without a large deployment of personnel. It is also preferred that optionally the line pieces 1.1 and/or the distribution devices 3.1, 3.2 are made of aluminum. This enables the heat transfer device to be manufactured inexpensively and reduces its weight. In addition, it is preferred that the heat transfer device is designed either as part of a condenser or as part of an evaporator.

In addition, it is preferred that a drain 4 for condensate or the like is provided at a lower end of the second flow guide 2 when used as intended. Finally, it is preferred that the first distribution device 3.1 is preceded by a separating device 5 for gaseous components of the first fluid, see FIG figure 1 .

The heat transfer device according to the invention according to the preferred embodiment works as follows:
The heat transfer device is first, such as in figure 1 shown oriented in the vertical direction. Then the first fluid is introduced through the first supply connection into the first distribution device 3.1. It is now deflected there by 90° and guided upwards in the line sections 1.1. Finally, the first fluid enters the second distribution device 3.2, is deflected again by 90° and finally conducted out of the heat transfer device through the first discharge connection. At the same time as this process, the second fluid is introduced into the second flow guide 2 from above through the second supply connection. This rectilinear guidance--without detours--of the second fluid causes less turbulence to occur in it and thus also a lower associated pressure loss and less noise generation. It then flows from top to bottom through space 2.1 and then leaves the heat transfer device again through the second discharge connection arranged on its underside.

The first and second fluids thus flow antiparallel through the heat transfer device for some distance. While the second fluid flows from top to bottom through the space 2.1, it comes into contact with the heat transfer fins 1.1.1 of the line pieces 1.1. This causes heat to be transferred from the second fluid via these same heat transfer fins 1.1.1 to the first fluid in the power pieces 1.1 (or vice versa).

Due to the (anti-) parallel conduction of the two fluids, there is a low gradient between their respective temperatures, which leads to a high efficiency of the heat transfer device. In addition, the vertical structure of the heat transfer device prevents an unequal distribution of the first fluid flow to the individual line sections 1.1 due to the effects of gravity and the removal of any condensate in the heat transfer device is facilitated, both of which in turn increase the efficiency of the device.

Reference List

1

first flow guide

1.1

line piece

1.1.1

heat transfer fin

1.1.2

cross rib

2

second flow guide

2.1

Space

3.1

first distribution device

3.2

second distribution device

3.3

flow opening

3.3.1

wall section

3.3.2

wall section

3.4

distribution channel

3.5

body

3.6

cover element

4

Sequence

5

separation device

Claims (14)

Heat transfer device, comprising a first flow guide (1) for a first fluid and a second flow guide (2) for a second fluid in heat-transferring contact with the first, wherein the first flow guide (1) has a plurality of parallel arranged, the first fluid vertically conducting line sections (1.1), the second flow guide (2) having a space (2.1) surrounding the line sections (1.1) and vertically conducting the second fluid, with a first distribution device (3.1) for supplying the first fluid to the line sections ( 1.1) and a second distribution device (3.2) for discharging the first fluid from the line sections (1.1) is provided, with a plurality of flow openings (3.3) connected to the space (2.1) being provided on the two distribution devices (3.1, 3.2) for the second fluid are provided, with the distribution devices (3.1, 3.2) being disc-shaped,
characterized,
that the line sections (1.1) have a rectangular internal flow cross section. Heat transfer device according to claim 1,
characterized,
that the distribution device (3.1, 3.2) seen in the main flow direction of the second fluid is many times shorter than in the direction of extension in a vertical plane is formed to the main flow direction of the second fluid. Heat transfer device according to claim 1 or 2,
characterized,
that the distribution device (3.1, 3.2) has a multiplicity of distribution channels (3.4) for the first fluid. Heat transfer device according to claim 3,
characterized,
that the through-flow openings (3.3) and the distribution channels (3.4) are arranged alternately to one another. Heat transfer device according to claim 1 and/or 3,
characterized,
that optionally the through-flow openings (3.3) and/or the distribution channels (3.4) are arranged along the circumference of imaginary rectangles, in particular squares, arranged concentrically to one another. Heat transfer device according to any one of claims 1 to 5,
characterized,
that the distribution device (3.1, 3.2) is designed in two parts. Heat transfer device according to claim 3,
characterized,
that the distribution device (3.1, 3.2) is formed from a base body (3.5) delimiting the distribution channels (3.4) on at least three sides and a cover element (3.6) delimiting the distribution channels (3.4) on one side. Heat transfer device according to any one of claims 1 to 7,
characterized,
that each through-flow opening (3.3) has at least two wall sections (3.3.1, 3.3.2) running parallel to one another. Heat transfer device according to any one of claims 1 to 8,
characterized,
that the line pieces (1.1) are designed to be pluggable into the two distribution devices (3.1, 3.2) for assembly. Heat transfer device according to any one of claims 1 to 9,
characterized,
that the line sections (1.1) are produced as extruded profiles. Heat transfer device according to any one of claims 1 to 10,
characterized,
that the line sections (1.1) have heat transfer ribs (1.1.1) on their side facing the second flow guide (2). Heat transfer device according to any one of claims 1 to 11,
characterized,
that transverse ribs (1.1.2) are arranged within the rectangular internal flow cross-section of the line pieces (1.1). Heat transfer device according to any one of claims 1 to 12,
characterized,
that the first distribution device (3.1) is optionally arranged below or above the second distribution device (3.2) when the heat transfer device is used as intended. Heat transfer device according to any one of claims 1 to 13,
characterized,
that the first fluid flows in a first main flow direction through the line pieces (1.1) and the second fluid flows in a second main flow direction, opposite to the first, through the conducting space (2.1).

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