DE102017011794A1 - Peltier heat exchanger - Google Patents

Abstract

It is a Peltier heat exchanger (1) with at least two heat exchange chambers (2 to 6) and with Peltier elements (7), which are arranged between the at least two heat exchanging heat exchange chambers (2 to 6), wherein the heat exchange chambers (2 to 6) contain a heat transfer medium and wherein inputs (10, 13) and outputs (11, 12) are provided for the heat transport medium with respect to the heat exchange chambers (2 to 6), which is thereby inexpensive to produce and improves the efficiency of thermal systems that the heat exchange chambers ( 2 to 6) are each tubular.

Description

The present invention relates to a Peltier heat exchanger with at least two heat exchange chambers and with Peltier elements, which are arranged between the at least two heat exchanging heat exchange chambers, the heat exchange chambers containing a heat transport medium and wherein inputs and outputs are provided for the heat transport medium with respect to the heat exchange chambers.

The term "Peltier heat exchanger" is used here, although the device also has properties of a heat pump, since the component "electric current" is added to the pure heat exchange. The present Peltier heat exchanger lacks the structural nature to be referred to as a heat pump. A normal heat exchanger can only transfer heat from higher to lower temperature. By the current-carrying Peltier elements but heat is also transferred from lower to higher temperature, so that in a Peltier heat exchanger a pumping property is given against the natural heat movement from warm to cold.

Peltier elements are electrothermal transducers that produce a temperature difference when current flows through. Depending on the polarity of the power supply, the thermal process at the heat transfer surfaces can be reversed from warm to cold or from cold to warm.

A heat exchanger with Peltier elements is, for example, from the document CH 700314 A2 known. It is about a Peltier heat exchanger, which is composed of parallel plates, which form heat exchange spaces and are equipped with Peltier elements. In the Peltier heat exchanger in question, there is a high heat loss, which would require a complex isolation. The Peltier elements are spaced apart from each other.

Another Peltier heat exchanger is from the document DE 10 2006 004 756 A1 known. This consists essentially of heat exchange plates of low thermal conductivity, copper plates and between them arranged in several rows Peltier elements. In the heat exchange plates water inlet and outlet openings and flow channels are incorporated. Here, the production cost of the media-carrying parts of the Peltier heat exchanger is very expensive.

The use of Peltier elements as a "heat pump" is also in DE 10 2005 036 492 A1 described. There, too, the Peltier elements are glued on thin metal plates. It is created a block-like device having two Peltier heat exchanger, between which extend the metal plates with the intermediate Peltier elements.

The invention has for its object to provide a Peltier heat exchanger of the type in question, which is inexpensive to produce and to improve the efficiency of energy systems, heating systems, heat and power plants, thermoelectric systems is used.

The above object is solved by the features of claim 1. Thereafter, a Peltier heat exchanger of the type in question is configured and further developed such that the heat exchange chambers are each tubular.

With a view to cost-effective production of the Peltier heat exchanger, it has been recognized that the plate shape or block shape known from the prior art is complicated in order to provide inputs and outputs as well as flow paths. In addition, large-scale, expensive insulation measures are required. On this basis, it was recognized to deviate from the usual plate or block form known Peltier heat exchanger. According to the invention, it has been recognized to form the heat exchange chambers tubular. As a result, the flow path is defined by the pipe and it requires no complex flow path design. Due to the tubular shape, the possibility of a smaller volume outer insulation is advantageously opened and the handling of the Peltier heat exchanger as a handy device is feasible. The Peltier heat exchanger is structurally inexpensive and easy to handle and can be used by various consumers in the private sector or in industry to improve the efficiency of a thermoelectric system, advantageously the self-consumption is increased.

In order to provide a basis for adhering the Peltier elements, the heat exchange chambers could each have at least one flat outer surface. The surface of the planar outer surface could, where the Peltier elements are glued, advantageously be worked particularly smoothly. The smooth surface prevents the ingress of air into the connection between Peltier element and flat outer surface. Due to the smooth surface, a particularly thin adhesive layer is sufficient to fasten the Peltier elements. The avoidance of air and the thin adhesive layer is a positive in terms of efficiency low electrical Resistance and a low heat transfer resistance of the Peltier elements associated.

The heat transfer medium could have the same direction of flow in all heat exchange chambers while transferring heat across the walls of the tubular heat exchange chambers. Alternatively, different flow directions of the heat transport medium in the sense of the known countercurrent principle could be realized.

According to a simple design, the heat exchange chambers of the Peltier heat exchanger according to the invention could comprise an inner chamber and at least two outer chambers. It is essential that in the preferred exterior-interior principle of such a design, the inner chamber has at least two planar outer surfaces with Peltier elements and the two outer chambers at least one planar outer surface, which interacts with the Peltier elements. In this simple design, the two outer chambers could be designed so that they surround the inner chamber like a ring, so that by the outer chambers itself insulation of the inner chamber is effected. Especially with an inner chamber, which would be traversed by the warmer heat transfer medium, this is of enormous advantage.

In an inner chamber-outer chamber design of the Peltier heat exchanger according to the invention, the heat transport medium in the inner chamber and the heat transport medium in the outer chambers could have different flow directions. The different flow directions of the heat transport medium in the inner chamber on the one hand and in the outer chambers on the other hand could preferably follow the countercurrent principle. In this case, the warmer heat transport medium could ascend in the inner chamber and flow down the colder heat transfer medium in the outer chambers. Here it is assumed that the tubular heat exchange chambers are placed vertically.

Since special pipe sections for the inner chamber and the outer chambers require increased costs, provides a cost-effective design of the Peltier heat exchanger according to the invention to form the inner chamber in the form of a tube with a square cross section and four flat outer surfaces. On all four outer surfaces, the Peltier elements could be arranged. Have proven commercially available inexpensive square copper tubes, depending on the power requirement corresponding dimensions, taking into account the dimensions of the commercially available Peltier elements.

With regard to the outer chambers, the above-described cost-effective design according to a preferred embodiment provides that four outer chambers are provided, each having at least one planar outer surface which impinges on the Peltier elements and corresponds in dimension to the respective outer surface of the inner chamber. Also with regard to the outer chambers, a tube with a quadrangular cross section could be used in each case. Here, too, preferably copper pipe is used because it has suitable thermal conductivity. Alternatively, aluminum pipes could be installed.

The basic form of the Peltier heat exchanger according to the invention according to the preferred cost-effective design is a cross in cross sections. When using square cross sections of the tubes in the inner chamber and the outer chambers to get the full rotational symmetry. With the cross shape of the device, an effective division of the inner and outer chambers of the embodiment of the Peltier heat exchanger according to the invention described here is achieved. The advantage of the internal arrangement of the hot inner chamber is that the inner chamber is completely surrounded by all outer chambers and no insulation is required.

Alternatively to the cross-shaped arrangement of an inner chamber and the four outer chambers according to the above-described embodiment, triangular cross sections, ring shapes could be developed, which correspond to each other. In alternative designs for cross-shape, it is advantageous if the outer chambers surround the inner chamber in order to bring about the insulation of the inner chamber. For triangular cross sections, four tubes would suffice for one inner chamber and three outer chambers. Measures for the isolation of the outer chambers are generally not excluded by the invention.

A further design of the cross-shaped Peltier heat exchanger could provide that in the recesses between the outer chambers also tubes are used, which, for example, depending on the take a preheating function for the outer chamber. This contributes to keeping the temperature difference between the outer chambers and the inner chamber low, with the consequence that also the heat transfer resistance is low and less power is required to generate the higher temperature in the inner chamber. The juxtaposition of pipes, whether they are standing or lying, opens up opportunities to exploit even small temperature differences across the Peltier elements. Continuing the plan outer surfaces of the tubular heat exchange chambers could a Coating with the Peltier effect, so that eliminates the expense of edge-to-edge bonding with Peltier elements.

In all embodiments of the Peltier heat exchanger according to the invention, which realize the inside-outside principle, could be provided in an advantageous manner, a pressure device which pressurizes the surrounding the inner chamber outer chambers with pressure. A cohesive connection between the inner and outer chambers is unnecessary because the pressure device acts on the outer chambers such that the inner chamber is jammed.

The pressure device could comprise several pipe clips or a collar. If, for example, the interior chamber carried thirteen Peltier elements on its planar outer surfaces, thirteen pipe clamps could be installed, with the closure regions of the pipe clamps being uniformly staggered, so that the pressurization is homogenized.

The exertion of compressive force on the inner chamber has not only the task of jamming the inner chamber, but also to increase the efficiency of the Peltier elements. Under pressure, the Peltier elements reduce their heat transfer resistance, thus intensify the heat exchange and improve the efficiency of the Peltier heat exchanger according to the invention. With respect to an embodiment using Peltier elements with edge lengths 4 cm x 4 cm and a power of 60 W to 240 W, a pressurization of 4 kg / cm ^{3 has been found to} be sufficient.

According to a further embodiment, the inputs and outputs of the outer chambers of the Peltier heat exchanger according to the invention could form at least one foot part, which on the one hand serves as a supporting stand element for the Peltier heat exchanger, but on the other hand also performs a pressure compensation function. To perform the pressure compensation function of the foot part could have a special, regulatory, geometric, preferably mirror-image, construction, which causes the pressure of the water flowing through it is the same everywhere and different flow resistance can be avoided.

In addition to a DC source that makes the Peltier elements functional and in addition to pressurization, which enhances the functionality of the Peltier elements, further beneficial effects on the Peltier elements could be due to water properties. It has been found that a uniform stimulation of the Peltier elements can be achieved if a temperature-homogeneous flow of the heat transport medium is realized. If there were no homogeneous temperature distribution in the heat transport medium, the resistance at the Peltier elements would always change and the heat exchange would not be so effective. So advantageous is the uniform work of the Peltier heat exchanger due to a homogeneous temperature distribution. Against this background, the entrances and exits of the heat exchange chambers could form at least one foot part, possibly also a head part, which is designed such that it effects a homogenization of the temperature of the heat transport medium. The could be achieved according to a particular embodiment of the invention by a special, regulatory, geometric, preferably mirror-image construction of the foot.

The pumping of the heat transfer medium in the foot of the Peltier heat exchanger could be realized by a pump, for example. A heating system. The pump pressure of the local pump is taken over for the circulation in the Peltier heat exchanger according to the invention. If the direction of flow of the warmer heat transfer medium is fixed upward, the heat transport medium could come from consumers or from a store, which have indeed withdrawn the heat transfer medium heat, but residual heat is still present.

In addition to the foot part of the Peltier heat exchanger according to the invention could also have a head portion having substantially the same regulatory, geometric, preferably mirror-image construction of the foot and the filling of the outer chambers in downward flow direction with the same advantages.

The cooled heat transfer medium could be transported by the Peltier heat exchanger according to the invention, for example. To a heat absorber a heating system, where it heats up easily and then flows back to the Peltier heat exchanger according to the invention. The heated heat transport medium could be transported by the Peltier heat exchanger according to the invention to a memory of a heating system, where it gives off its heat and flows back through a separate circulation pump. In this case, the inner chamber could be flowed through by the heat transfer medium coming from the foot part, which reaches the store at a higher temperature via the head part. By contrast, the outer chambers could be flowed through by the heat transfer medium coming from the head part, which then passes with decreasing temperature over the foot part to the heat absorber of a heating system

According to a further preferred embodiment of the Peltier heat exchanger only those Peltier elements could be used which have the same resistance values. For this purpose, a test with a laboratory power supply could be carried out before installation in the Peltier heat exchanger, in particular before sticking to the outer surfaces of the inner chamber.

The same quality of the installed Peltier elements is particularly important in their series connection of great importance, since otherwise the weakest Peltier element with the greatest resistance determines the working speed of the Peltier heat exchanger according to the invention.

A further preferred embodiment of the Peltier heat exchanger according to the invention provides that the Peltier elements, edge to edge, are arranged and form a closed surface.

The uninterrupted, area-wide edge-to-edge laying of the Peltier elements is advantageous for the Peltier heat exchanger according to the invention in that insulation bridges are prevented and a homogeneous, good flow of current is achieved. The consistent quality of the current flow improves the initialization and exercise of the properties of the Peltier elements. When realizing the inside-outside principle on the Peltier heat exchanger according to the invention, the area-covering arrangement of the Peltier elements could be achieved by applying Peltier elements without gaps to all outer surfaces of the inner chamber. As a result, most of the Peltier elements are utilized in the smallest of spaces.

Further features of the Peltier heat exchanger according to the invention are directed to the arrangement of flow obstacles in the heat exchange chambers, which serve to swirl the heat transfer medium and to homogenize the temperature. The flow obstacles could be in the form of several against each other in particular offset by 90 degrees inserts, of which the top and the bottom are perforated. The inserts could be formed by pipe pieces. The flow obstacles can be arranged in both the upright interior chamber and in the upright outer chambers in the internal-external principle, namely across the vertical orientation of the heat exchange chambers. The heat transport medium transforms when flowing through the perforation of the upper insert as a flow obstacle from the jet to the vortex. This reduces the flow velocity and the heat transport medium can absorb heat better, because it bounces against the inner surfaces of the inner and outer chambers, which preferably consist of thermally conductive copper. An upper tube piece could have a large recess facing the entrance of the heat exchange chamber. A lower piece of pipe could have a large recess facing the exit of the heat exchange chamber. The opposite areas of the upper and lower tube piece could be perforated like a sieve. At least one medium insert could do without perforation and optionally also be present as a piece of pipe. The length of the inserts, possibly pipe sections, corresponds approximately to the inner cross section of the heat exchange chambers.

In addition, in embodiments that realize the inside-outside principle, an insulating container could be provided in which the Peltier heat exchanger is used.

Finally, a control could be provided with regard to the current flow of the Peltier elements. The Peltier elements could be soldered into strands. Multiple strands could be connected in series and / or in parallel. The two terminals of each Peltier element are soldered or short-circuited. Only the first and the last Peltier element of a strand have connections and are supplied with direct current via them. Within a thermoelectric system, the controller could also take over the regulation of feed-in power into the public grid at peak times, thereby contributing to grid relief.

The tubular heat exchange chambers could preferably extend vertically to the ground and allow a space-saving arrangement and an insertion in heating systems even smaller format. Alternatively, a different arrangement of a vertical arrangement of the heat exchange chambers - inclined to the ground or parallel - also possible.

The heat transport medium could be water. The water could additionally be enriched with antifreeze to prevent icing. In industrial applications, the heat transport medium could also be water vapor or exhaust gas.

The Peltier heat exchanger according to the invention could be used within energy plants, heat-power plants, thermoelectric plants or heating systems, in particular comprising buffer storage, and serve to improve the efficiency. As applications of the Peltier heat exchanger according to the invention come depending on the design of family houses as well as, for example, industrial plants for waste heat recovery. In industrial application would be a robust construction of the Peltier heat exchanger according to the invention be required, which withstands the pressures of hot steam or exhaust gases. Again, the inside-outside principle can be realized, but preferably with introduction of the hot heat transport medium in the outer chambers and the cooler heat transfer medium in the inner chamber. The more cooled by the Peltier heat exchanger according to the invention, the higher the electrical power of the Peltier heat exchanger then present as a thermogenerator. Another application of the Peltier heat exchanger according to the invention relates to the field of air conditioning.

• 1 in schematischer Darstellung, eine Vorderansicht des erfindungsgemäßen Peltier-Wärmetauschers,
• 2 in schematischer Darstellung, eine Vorderansicht des Gegenstandes der 1 unter Weglassung der Druckeinrichtung,
• 3 A eine Schnittdarstellung entlang der Schnittlinie A-A des Gegenstandes der 2, unter Vernachlässigung des Fußteils,
• 3 Beine Schnittdarstellung entlang der Schnittlinie B-B des Gegenstandes der 2, unter Vernachlässigung des Kopfteils,
• 4 eine Aufsicht auf den Gegenstand der 2,
• 5 eine Unteransicht des Gegenstandes der 2,
• 6 in verkleinerter Darstellung, ein Detail aus 5, betreffend den Aulass und dessen Strömungsverbindung zur Ringleitung
• 7 in schematischer Darstellung, Kante an Kante liegende Peltier-Elemente, die eine Fläche ausbilden und
• 8 in schematischer Darstellung, eine Aufsicht auf eine quadratische Innenkammer und vier rechteckige Außenkammern einer alternativen Bauformvariante des erfindungsgemäßen Peltier-Wärmetauschers.

There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the claims subordinate to claim 1, on the other hand, to refer to the following explanation of an embodiment with reference to the drawing. In conjunction with the explanation of the cited embodiment of the invention with reference to the drawings, generally preferred embodiments and developments of the teaching are explained. In the drawing show

• 1 in a schematic representation, a front view of the Peltier heat exchanger according to the invention,
• 2 in a schematic representation, a front view of the object of 1 omitting the printing device,
• 3 A a sectional view taken along the section line AA of the subject of the 2 , neglecting the foot part,
• 3 Legs sectional view along the section line BB of the object of the 2 , neglecting the head part,
• 4 a supervision of the object of 2 .
• 5 a bottom view of the object of 2 .
• 6 in reduced form, a detail from 5 , concerning the outlet and its flow connection to the loop
• 7 in a schematic representation, edge-to-edge Peltier elements that form a surface and
• 8th in a schematic representation, a plan view of a square inner chamber and four rectangular outer chambers of an alternative design variant of the Peltier heat exchanger according to the invention.

The 1 to 6 show a Peltier heat exchanger 1 with five heat exchange chambers 2 to 6 and with Peltier elements 7 , The heat exchange chamber 2 lies as an interior chamber 2 represented by a tube with a square cross section. At the four plan outer surfaces 8th the inner chamber 2 are each a variety of Peltier elements 7 glued. In the present embodiment, thirteen Peltier elements 7 per outer surface 8th the inner chamber 2 intended.

The heat exchange chambers 3 to 6 form the outer chambers 3 to 6 and are also formed by tubes having a square cross-section. The outer chambers 3 to 6 have at least there flat outer surfaces 9 on where they are with the Peltier elements 7 stay in contact. The inner chamber 2 is from a heat transport medium in the flow direction 2A - See arrow 2A in 2 - flowed upwards. The outer chambers 3 to 6 are from the same heat transport medium in the flow direction 3B - 6B - See arrow 3B - 6B in 2 - flowed through downwards. The heat transfer medium is water of a thermal plant, which is mixed with antifreeze.

For the inlet and outlet of the heat transfer medium in and out of the heat exchange chambers 2 to 6 are inputs 10 and 13 as well as exits 11 and 12 intended. The inner chamber 2 receives the heat transport medium via the central entrance 10 , The heat transport medium leaves the inner chamber 2 over the central exit 11 , The outer chambers 3 to 6 be over the entrance 13 fed with the heat transport medium. The heat transfer medium leaves the outer chambers 3 to 6 over the exit 12 , Suitable for the flow directions 2A and 3B - 6B are the entrance 10 for the inner chamber 1 and the exit 12 the outer chambers 3 to 6 based on the underground 14 arranged below and the entrance 10 for the outer chambers 3 to 6 as well as the output 11 the inner chamber 2 are related to the underground 14 arranged above.

The inventively tubular heat exchange chambers 2 to 6 with the inner chamber 2 and the outer chambers 3 to 6 extend in the present embodiment perpendicular to the ground 14 ,

In the inner chamber 2 the heat transport medium is heated in the present embodiment, in the outer chambers 3 to 6 Heat is removed from the heat transport medium and to the inner chamber 2 exchanged. The heat exchange against the natural temperature gradient from warm to cold is provided by the Peltier elements 7 allows, via a DC source 15 is fed with direct current.

The DC source 15 is symbolic in 4 represented and lies in the present Embodiment in the form of a photovoltaic system before. The Peltier heat exchanger 1 has a terminal block 16 for electrical connections to which the Peltier elements 7 and the DC power source 15 connected, what about the DC source 15 through a dotted line to the terminal block 16 is shown. The one from the DC source 15 produced direct current first flows through the Peltier heat exchanger 1 before it then flies to an inverter, not shown here, which converts the direct current into alternating current and feeds it into the public power grid.

From the 2 it can be seen that the Peltier heat exchanger several pressure devices 17 in the form of pipe clamps 17 which has the inner chamber 2 surrounding outer chambers 3 to 6 hold together and pressurize. Specifically, here are each at the height of each of thirteen Peltier elements 7 also thirteen clamps 17 intended. The on the outer chambers 3 to 6 applied pressure causes the inner chamber 2 is held and that the Peltier elements 7 be subjected to contact pressure. The clamp clips 23 the clamps 17 be about the length of the outer chambers 3 to 6 always offset relative to the longitudinal axis L of the Peltier heat exchanger 1 positioned and closed to equalize the pressure. In 1 this is indicated by the fact that in a pipe clamp 17 the clamp clamp 23 not shown, because it is concealed, on the other side of the Peltier heat exchanger 1 is positioned.

The upright on the ground 14 standing Peltier heat exchanger 1 has a footboard 18 and a headboard 19 , The foot part 18 is in the 1 . 2 . 5 and 6 shown and will pass through to the exit 12 subsequent ring line 20 with distribution connections 21 for the four outer chambers 3 to 6 educated. In 6 is shown at the entrance 12 two diametric flow connections 22 connect that into the loop 20 lead. The ring line 20 of the foot part 18 forms here the contact surface to the underground 14 out. The distribution connections 21 of the foot part 18 rise up to the outer chambers 3 to 6 , The in the 1 . 2 . 3 shown headboard 19 is to the foot part 18 constructed analogously and also has the terminal block 16 for electrical connections. The foot part 18 and the headboard 19 have a largely symmetrical structure for the homogenization of the heat transfer medium and thus the temperature. At the headboard 19 close the two flow connections 22 to the exit 13 on.

The 3A and 3B show sectional views through the in 2 shown Peltier heat exchanger 1 in the direction of the foot part 18 at 3A / Section AA and looking towards the headboard 19 at 3B / Cut BB. The foot part 18 and the headboard 19 are in the 3A and 3B omitted. Although the flow obstacles 24 only in the inner chamber 2 and in the outer chamber 3 they are in all heat exchange chambers 2 to 6 contain. The flow obstacles 24 are short pieces of pipe that are inside the heat exchange chambers 2 to 6 are arranged and directed to the outside a large passage opening 25 and directed inwards several small passages 26 respectively. In addition to the five flow obstacles shown 24 in the neighborhood to the foot part 18 are analogously five identically shaped flow obstacles not shown in the vicinity of the head part 19 intended.

In the present embodiment of the Peltier heat exchanger according to the invention 1 were four strands with thirteen Peltier elements 7 , so a total of fifty-two Peltier elements 7 , with edge length 4 cm and with identical resistance values. The ever thirteen Peltier elements 7 are, as in 7 shown, arranged edge to edge forming on the plane outer surface 8th the inner chamber 2 a coherent surface.

In addition to the in the 3A and 3B shown cross-shaped construction of five square in cross-section heat exchange chambers 2 to 6 will be in the 8th an alternative design presented. at 8th is the inner chamber 2 also square in cross-section, but the outer chambers have 3 to 6 a rectangular cross section.

With regard to further features, not shown in the figures, reference is made to the general part of the description. Finally, it should be noted that the teaching of the invention is not limited to the above-discussed embodiment and the variants presented.

LIST OF REFERENCE NUMBERS

1

Peltier heat exchanger

2

Heat exchange chamber, inner chamber

3

Heat exchange chamber, outer chamber

4

Heat exchange chamber, outer chamber

5

Heat exchange chamber, outer chamber

6

Heat exchange chamber, outer chamber

7

Peltier element

8th

Plane outer surface of 2

9

Plane outer surface of 3-6

10

entrance 2

11

exit 2

12

entrance 3-6

13

exit 3-6

14

underground

15

DC power source

16

terminal block

17

Printing device, pipe clamp

18

footboard

19

headboard

20

loop

21

Distributor connection for 3-6

22

Flow connection of 12 or 13

23

Pipe clamp closure

24

flow obstruction

25

Through opening

26

Through opening

2A

flow direction

3B-6B

flow direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CH 700314 A2 [0004]
• DE 102006004756 A1 [0005]
• DE 102005036492 A1 [0006]

Claims (12)

Peltier heat exchanger (1) having at least two heat exchange chambers (2 to 6) and with Peltier elements (7) disposed between the at least two heat exchanging heat exchange chambers (2 to 6), wherein the heat exchange chambers (2 to 6) a heat transport medium and wherein inputs (10, 13) and outputs (11, 12) for the heat transport medium with respect to the heat exchange chambers (2 to 6) are provided, characterized in that the heat exchange chambers (2 to 6) are each tubular. Peltier heat exchanger after Claim 1 , characterized in that the heat exchange chambers (2 to 6) each have at least one flat outer surface (8, 9). Peltier heat exchanger after Claim 1 or 2 , characterized in that at least one heat exchange chamber (2) is provided, the heat transfer medium in a flow direction (2A) flows and that at least one further heat exchange chamber (3 to 6) is provided, the heat transfer medium in another flow direction (3B-6B) flows. Peltier heat exchanger according to one of Claims 1 to 3 , characterized in that the heat exchanging heat exchange chambers (2 to 6) comprises an inner chamber (2) and at least two outer chambers (3 to 6). Peltier heat exchanger after Claim 4 characterized in that the inner chamber (2) contains the heat transport medium in the flow direction (2A) and that the at least two outer chambers (3 to 6) contain the heat transport medium with a different flow direction (3B-6B). Peltier heat exchanger after Claim 4 or 5 , characterized in that the inner chamber (2) comprises a tube with a square cross section and four flat outer surfaces (8) on which the Peltier elements (7) are arranged. Peltier heat exchanger after Claim 6 , characterized in that four outer chambers (3 to 6) are provided, each comprising at least one planar outer surface (9), wherein the flat outer surfaces (9) of the outer chambers (3 to 6) with the Peltier elements (7) of the inner chamber (2) and wherein each outer chamber (3 to 6) preferably comprises a tube with a square cross section. Peltier heat exchanger according to one of Claims 4 to 7 , characterized in that at least one pressure device (17) is provided which pressurizes the outer chamber (3 to 6) surrounding the inner chamber (2) and the Peltier elements (7). Peltier heat exchanger according to one of Claims 1 to 8th , characterized in that the inputs (10, 13) and outputs (11, 12) of the heat exchange chambers (2 to 6) form a foot part (18), possibly also a head part (19), which is designed such that it causes a homogenization of the temperature of the heat transport medium. Peltier heat exchanger according to one of Claims 1 to 9 , characterized in that the Peltier elements (7) have the same resistance values and preferably the same dimensions. Peltier heat exchanger according to one of Claims 1 to 10 , characterized in that the Peltier elements (7) are arranged edge to edge and form a continuous surface. Peltier heat exchanger according to one of Claims 1 to 11 characterized in that the heat exchange chambers (2 to 5) extend perpendicular to the substrate (14).

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