HEAT EXCHANGER, AIR CONDITIONER ARRANGEMENT AND SWITCH CABINET

Abstract

A heat exchanger for air conditioning in a switch cabinet, with a pipe system that is configured to transport a coolant, and comprises multiple pipe pieces, and at least one pipe piece connector element, wherein the at least one pipe piece connector element connects two end sections of the pipe pieces to each other fluidically, and with a heat transfer element, which is preferably embodied as a fin arrangement with a multiplicity of fins, wherein the heat transfer element accommodates the pipe pieces of the pipe system in such a manner that the end sections of the pipe pieces protrude from the heat transfer element. Additionally, at least one capsule is provided, wherein the end sections of the pipe pieces of the pipe systems open into the at least one capsule, so the at least one pipe piece connector element is arranged inside the at least one capsule.

Description

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of German Patent Application Serial No. 20 2024 104 819.9 filed on Aug. 27, 2024, which is herein incorporated by reference in its entirety.

TECHNICAL FIELD

The invention relates to a heat exchanger, in particular a heat exchanger for air conditioning in a switch cabinet, with a pipe system that is configured to transport a coolant, and comprises multiple pipe inserts and at least one pipe insert connector, wherein the at least one pipe insert connector connects two or more end sections of the pipe pieces to each other fluidically, and with a heat transfer element, which is preferably embodied as a fin arrangement with a multiplicity of fins, wherein the heat transfer element accommodates the pipe pieces of the pipe system in such manner that the end sections of the pipe pieces protrude from the heat transfer element.

The invention also relates to an air conditioner arrangement for a switch cabinet, in particular for use with a switch cabinet.

The invention further relates to a switch cabinet with a housing that accommodates a multiplicity of electronic components.

TECHNOLOGICAL BACKGROUND

A switch cabinet of the kind discussed here accommodates multiplicity of electronic components, which are configured to control a process plant, a machine tool or some other manufacturing device. Typically installed electronic components include in particular power lines, terminals, resistors, condensers, diodes, transistors, inductors, integrated circuits, relays, sensors, and many more. During specified normal operation of such a switch cabinet, heat is generated and must be dissipated effectively in order to ensure the long-term functional capability of the electrical components. In a conventional switch cabinet, a species-related heat exchanger with a pipe system and/or an air conditioner with such a heat exchanger is installed for this purpose, wherein the pipe system is configured to transport a coolant, and includes multiple pipe pieces as well as multiple pipe bends, wherein the pipe bends each connect two end sections of two pipe pieces to each other fluidically. In this respect, the pipe system forms a pipe coil, in which a coolant circulates, taking up heat inside the switch cabinet and dissipating the heat outside the switch cabinet. In order to remove the heat effectively, an airflow is created in an internal circuit and in the interior of the switch cabinet and impinges on the heat exchanger. This internal circuit, or the interior of the switch cabinet, is shielded from the surrounding environment, or an external circuit, so that no gases can get into the interior of the switch cabinet.

According to the prior art, the use of fluorinated greenhouse gases in particular as coolant is known, but although these gases are advantageous for thermodynamic reasons with regard to heat dissipation, in the event of a leak they are discharged into the surrounding atmosphere, which is linked to adverse effects for the climate. Areas of such a pipe system that are particularly prone to leaks are pipe bends with a curvature of more than 90°, and connection points, particularly soldered joints, between the pipe bends and the pipe pieces. The use of fluorinated coolants must therefore be discontinued sooner rather than later, and for this reason they will have to be replaced with alternative coolants in future.

Alternative coolants that can be used to good effect for thermodynamic reasons, are usually combustible and/or highly flammable or exhibit high operating pressures in transcritical operation. In order to be able to use such coolants in a switch cabinet air conditioning system safely and in compliance with regulations, it is essential for the design of the internal circuit of the switch cabinet in particular to be inherently safe. In this context, it must be ensured that escaping coolant, particularly in the area of the evaporator, does not produce an explosive atmosphere even in the event of a leak, because this might be ignited by an electronic component in the switch cabinet.

DESCRIPTION OF THE INVENTION: OBJECT, SOLUTION, ADVANTAGES

On the basis of the above, it is the object of the invention to provide a heat exchanger, an air conditioner arrangement and a switch cabinet, which allow explosion-proof operation of the heat exchanger with a combustible and/or highly flammable coolant or with a refrigerant.

In a first aspect, this object is solved with a heat exchanger, in particular a heat exchanger for air conditioning in a switch cabinet, with a pipe system that is configured to transport a coolant and comprises multiple pipe pieces and at least one pipe piece connector, wherein the at least one pipe piece connector element connects two or more end sections of the pipe pieces to each other fluidically, and with a heat transfer element, that is preferably embodied as a fin arrangement with a multiplicity of fins or lamellae, wherein the heat transfer element accommodates the pipe pieces of the pipe system in such manner that the end sections of the pipe pieces protrude from the heat transfer element, wherein at least one capsule is provided, wherein end sections of the pipe pieces of the pipe system open into the at least one capsule, so that the at least one pipe piece connector element is arranged inside the at least one capsule.

The at least one capsule forms a region which is closed off, in particular from the internal circuit and an interior of the switch cabinet in such a way that gases contained in the capsule cannot get into the interior of the switch cabinet. For this purpose, the at least one capsule preferably surrounds a housing, in particular a separate and/or in particular self-contained housing, and/or is constructed as such a housing. In this respect, even if a leak occurs in the area of a leak-prone pipe connector, no coolant gets into the internal circuit or interior of the switch cabinet, where the electrical and/or electronic components of the switch cabinet are located, so such a heat exchanger can also be operated with a combustible and/or highly flammable coolant.

Advantageous further developments of the present invention will be described in the following text and in the dependent claims.

According to an advantageous further development of the invention, two capsules are provided, between which the heat transfer element is arranged, wherein the end sections of the pipe pieces of the pipe system each open into one of the capsules, wherein at least one pipe piece connector element is arranged in each of the two capsules. The at least one pipe piece connector element is configured and/or constructed to connect a coolant inflow pipe piece to a coolant outflow pipe piece fluidically. Such a pipe piece connector element may include for example at least one or more collector elements or manifolds. Multiple pipe pieces, in particular two pipe pieces, open into such a collector element. Such a collector element has at least one inflow and at least one outflow and is constructed for the purpose of connecting a coolant inflow pipe piece to a coolant outflow pipe piece fluidically. Such a collector element may preferably comprise one or more housings or one or more, in particular straight, pipe segments. Alternatively, it is provided that the at least one pipe piece connector element comprises one or more pipe bends, wherein the pipe bends each connect two end sections of two pipe pieces to each other fluidically.

According to an advantageous further development of the invention, it is provided that the pipe pieces and the at least one pipe piece connector element are connected to each other materially coherent via connection points, wherein the connection points are expediently each arranged inside one of the capsules. A materially coherent connection is in particular a soldered connection. Because the connection point is arranged inside one of the capsules, all leak-prone areas of the pipe system are shielded from the internal circuit of the switch cabinet in such a way that an exchange of gases is prevented, with the result that the heat exchanger can be used safely and in conformance with regulations.

The pipe system preferably has no leak-prone areas outside the capsules.

According to an advantageous further development of the invention, it is provided that the pipe pieces have a curvature relative to their respective longitudinal axis that is preferably less than or equal to 90°, particularly preferably less than or equal to 45°. Alternatively, it is preferable that the pipe pieces are without curvature relative to their respective longitudinal axis. This also makes it easier to fit them inside the heat transfer elements and/or to provide all leak-prone areas inside the at least one capsule.

The pipe bends preferably have a bending between 170° bis 190°, preferably substantially 180°, particularly preferably 180°. Such a bending allows the pipe pieces to be arranged preferably parallel to each other inside the heat transfer element. Thus, the pipe bends preferably have a bending of 180°, which simplifies the assembly of the heat exchanger, particularly in combination.

In order to maintain a coolant circuit, a coolant compressor is arranged, in particular outside the switch cabinet and further in particular inside an air conditioner assigned to the switch cabinet. In order to connect the pipe system with the coolant compressor of the coolant pump, it is preferably provided that a first pipe piece is connected to a coolant inflow, and a second pipe piece is connected to a coolant outflow. The coolant inflow and outflow are preferably part of the coolant circuit.

The heat exchanger preferably contains a coolant, wherein the coolant is preferably combustible and/or potentially explosive. In particular, it is provided that the coolant is or contains propane, butane, isobutane or propene, which has proven to be particularly effective among the available alternative coolants.

The pipe system of the heat exchanger may be of single-wall or double-wall construction, in particular outside the capsules, preferably in a section between two capsules. In an entirely single-wall construction of the pipe system outside the capsules, it is preferably provided that that the fins of the heat transfer element are connected directly to the pipe pieces for the purpose of heat transfer. This means that the fins lie against the pipe pieces and/or are connected materially coherent to the pipe pieces, which increases the thermal conductivity of the connection point, and thus favours the heat dissipation. In such a case, the at least one capsule is preferably filled with a fluid, preferably a gas, particularly preferably air, or a liquid, preferably water. In this context, the at least one capsule is preferably configured to be fluid-impermeable, so that the fluid it contains does not escape from the capsule.

To ensure that the switch cabinet can be switched off and isolated or is automatically de-energised immediately in the event of a leak or directly thereafter in the event that a leak occurs in the pipe system, it is provided according to an advantageous further development that the at least one capsule has a leak detector or leak detection device, wherein the leak detector is configured to detect a leak of the coolant. The leak detector preferably includes a pressure switch and/or a pressure sensor and/or a fluid sensor, in particular a liquid sensor and/or a gas sensor. If at least two capsules are provided, each capsule may include a leak detector, or only one of the capsules may have one. If multiple capsules are provided, a leak detector is preferably provided in each capsule. This is particularly preferable with pipe pieces of single-wall construction. The pressure or fluid sensors of the leak detector interact with the fluid-filled capsules in such a way that the switch cabinet is de-energised automatically when a rise or fall in pressure is detected or fluid is detected.

In one variant of the pipeline system of the heat exchanger, which is of double-walled construction outside the capsules, preferably in a section between two capsules, it is provided that each of the pipe pieces are encircled or surrounded by an outer pipe in such manner that an annular space is formed between the pipe pieces and the associated outer pipes, which is configured to transport a liquid, in particular a thermofluid. A thermofluid or temperature control liquid is a medium which is liquid at temperatures that typically prevail during proper use of the heat exchanger and exhibits relatively high thermal conductivity. In this respect, such thermofluids are ideal for transferring heat effectively over the fins and the thermofluid to the coolant. A thermal oil in particular is suitable for use as thermofluid. At the same time, the pipe pieces and associated outer pipes are preferably arranged coaxially with each other. The outer pipes have end sections, each of which preferably ends into one of the capsules, so that the capsules are connected to each other fluidically via the annular spaces. The outer pipe preferably encircles the respective pipe piece at least along a length of 80% of the total length of the respective pipe piece, particularly preferably at least 90% of the total length of the respective pipe piece, most particularly preferably substantially over the entire length of the pipe piece.

To ensure the coaxial alignment and positionally stable assembly of the pipe pieces with the outer pipes assigned to each of them, it is provided that the pipe pieces are connected with the assigned outer pipes via spacers, in particular spacer discs, wherein the outer pipes preferably have recesses, in particular drillholes, via which the annular spaces are connected to the capsules fluidically. The spacers are annular fastening elements, which are first slid onto the pipe pieces and encircle or surround them. In the assembled state, at least sections of the outer pipes are attached to the spacers, creating a coaxial, positionally stable alignment between each pipe piece and an outer pipe positioned coaxially therewith. Due to the hydraulic connection between the capsules, it is sufficient in a heat exchanger embodiment of this kind for at least one of the capsules to include a leak detector, wherein the leak detector preferably has a pressure switch and/or a pressure sensor and/or a liquid sensor. If a significant loss of pressure occurs, it can be assumed that there is a leak of the thermofluid through the outer wall of the capsules and/or the outer pipes. If there is a marked rise in pressure, it can be assumed that there is a leak in the pipe system, that is to say the coolant is escaping into the thermofluid. A leak detector for the thermofluid may also have the form of a liquid sensor outside the encapsulated region. For the purposes of heat transfer, it is provided that the fins of the heat transfer element are connected directly to the outer pipes, so that the heat from the fins is transferred to the thermofluid and from the thermofluid to the coolant.

Regardless of the specific design of the heat exchanger, it may be embodied as an evaporator of a compression refrigeration machine. A compression refrigeration machine is a refrigerating machine that uses the physical effect of the increase in enthalpy difference during a change in the aggregate state of a coolant, from liquid to gas phase, for example. The circulating coolant undergoes various changes in aggregate state successively. Use is made of the fact that the condensation and boiling temperature of the coolant changes depending on its pressure. The cooling in the gas phase is first compressed by means of a compressor, causing the boiling temperature and the pressure to rise. In a condenser downstream, it condenses and gives off heat. The liquid coolant is then relaxed through a throttling device, wherein the boiling temperature falls. In the following evaporator, the coolant evaporates and takes up heat at low temperature, thereby closing the circuit.

The object identified in the introduction is also solved with an air conditioner arrangement for a switch cabinet, in particular for use with a switch cabinet, wherein the air conditioner arrangement has a housing that includes a cabinet side housing region and an external housing region, and a partition wall arranged between the cabinet side housing region and the external housing region, which separates the cabinet side housing region and the external housing region from each other fluidically, wherein the air conditioner arrangement further comprises a heat exchanger as described previously, wherein the heat exchanger is arranged, in particular entirely, in the cabinet side housing region.

It is preferably provided that the heat exchanger is embodied as evaporator of a compression refrigeration machine, comprising a compressor, a condenser and a throttling device, wherein the compressor, the condenser and the throttling device are arranged in the external housing region of the air conditioner. To enable the creation of a fluid-conducting coolant circuit between the heat exchanger, which is arranged in the cabinet side housing region, and the compressor, the condenser and the throttling device of the compression refrigeration machine, it is provided that the coolant inflow and the coolant outflow preferably pass through the partition wall. In such case, according to a particularly advantageous further development, it is provided that a section of the at least one capsule lies against the partition wall and/or forms a section of the partition wall.

The overall result is an air conditioner arrangement having a compact housing that accommodates all of the components necessary for effective air conditioning of a switch cabinet. Additionally, such an air conditioner arrangement can be mounted on a switch cabinet particularly easily. The air conditioner arrangement further allows explosion-proof operation of the heat exchanger with a combustible and/or highly flammable coolant. A further advantage of the air conditioner arrangement consists in that it may also include an integrated leak detection system.

The object as defined in the introduction is also solved with a switch cabinet having a housing that accommodates a multiplicity of electronic components, wherein the switch cabinet includes such a heat exchanger and/or such an air conditioner.

BRIEF DESCRIPTION OF THE FIGURES

In the following text, a specific embodiment of the invention will be explained with reference to the figures. In the figures:

FIG. 1a is a cross-sectional view of a first embodiment of a heat exchanger;

FIG. 1b is a perspective view of the first embodiment of a heat exchanger;

FIG. 2a is a cross-sectional view of a second embodiment of a heat exchanger;

FIG. 2b is a first detail view of the second embodiment of the heat exchanger;

FIG. 2c is a second detail view of the second embodiment of the heat exchanger;

FIG. 2d is a cross-sectional view of the second embodiment of the heat exchanger along cross-sectional plane A-A; and

FIG. 3 shows a switch cabinet with air conditioner arrangement.

DETAILED DESCRIPTION OF THE FIGURES

FIG. 1a shows a cross-sectional view of a first heat exchanger 100, which is configured as part of an air conditioner arrangement 200 for air conditioning in a switch cabinet 300 (FIG. 3). FIG. 1b shows a perspective view of this heat exchanger 100. The heat exchanger 100 includes a pipe system 10 and a heat transfer element 11. The pipe system 10 is configured to transport a coolant 12 and has multiple pipe pieces 13 and multiple pipe piece connector elements 14 in the form of multiple pipe bends 141. The coolant 12 is combustible. In particular, the coolant is or contains propane 121. Each of the pipe bends 141 connect two end sections 151, 152 of two pipe pieces 13 fluidically. The heat transfer element 11 is constructed as a fin arrangement 111 and has a multiplicity of fins 16 or lamellae. The heat transfer element 11 accommodates the pipe pieces 13 of the pipe system 10 in such manner that the end sections 151, 152 of the pipe pieces 13 protrude from the heat transfer element 11. The heat exchanger 100 has two capsules 171, 172, arranged on the left and right of the heat transfer element 11, each being constructed as a separate, self-contained housing and thus forming a region that is isolated in particular from the internal circuit and the interior of the switch cabinet 300, with the result that gases contained therein cannot get into the inside of the switch cabinet 300. The end sections 151, 152 of the pipe pieces 13 of the pipe system 10, which are connected to a pipe bend 141, each open into one of the capsules 171, 172, so the pipe bends 141 are arranged inside the capsules 171, 172. The pipe pieces 13 and the pipe bends 141 are connected to each other materially coherent via connection points 18, wherein the connection points 18 are each arranged inside one of the capsules 171, 172. In the embodiment shown, the connection points 18 are in the form of soldered joints 181. The pipe pieces 13 are straight relative to their respective longitudinal axis, which means that they have no curvature. The pipe bends 141 have a bending of 180°, so the pipe pieces 13 are aligned parallel to each other inside the heat transfer element 11. A first pipe piece 13 is connected directly to a coolant inflow 19, and a second pipe piece 13 is connected directly to a coolant outflow 20, wherein in the embodiment shown the coolant 12 is propane 121. Between the coolant inflow 19 and the coolant outflow 20, the pipe system 10 forms a meandering pipe coil which passes through the heat transfer element 11 multiple times between capsule 171 on the left and the capsule 172 on the right.

FIG. 1a, b show a heat exchanger 100 whose pipe system 10 is of single-wall construction in the region of the heat transfer element 11. In such case, the fins 16 of the heat transfer element 11 are connected directly to the inserts 13 to transfer the heat. The capsules 171, 172, which accommodate all leak-prone sections of the pipe system 10, are filled with a gas 21 and configured to be gas-impermeable. In the embodiment represented, the gas 21 is air 211. Each capsule 171, 172 is equipped with a leak detector 22, wherein the leak detector 22 has a pressure sensor 23. If the pressure inside one of the capsules 171, 172 rises above a preset value, there may be a leak, in which case the switch cabinet 200 is de-energised by means of emergency off switching.

FIGS. 2a-d show a second heat exchanger 100, which is also configured to condition air in the switch cabinet 200. The pipe pieces 13 are each encircled by an outer pipe 24 in such manner that an annular space 25 is formed between the pipe pieces 13 and the associated outer pipes 24 and is configured to transport a thermofluid 26. The pipe pieces 13 and the associated outer pipes 24 are arranged coaxially with each other (FIG. 2d). The outer pipes 24 have end sections 271, 272, each of which opens into one of the capsules 171, 172, so that the capsules 171, 172 are connected to each other fluidically via the annular spaces 25. The pipe pieces 13 are connected to each other with the attached outer pipes 24 via spacers 28, wherein recesses 291, 292 are provided so that the annular spaces 25 are connected to the capsules 171, 172 fluidically (FIG. 2b, c). In contrast to this, in the embodiment according to FIG. 2b the recesses 291 are created in the peripheral surfaces of the outer pipes 24. In this context, one or more recesses 291 may have been created. In contrast thereto, in the embodiment according to FIG. 2c, the recesses 292 have been created in the direction of the longitudinal axis inside the spacers 28. The detail view of FIG. 2c shows a cross-sectional view of the outer pipe 24 in the region of the spacer 28. In this embodiment, 8 recesses 292 are arranged equiangularly inside the spacer. In the scope of an embodiment not shown here, both types of recess 291, 292 may also be provided. Regardless of the specific configuration of the recesses 291, 292 it is sufficient for the detection of a leak thereby if only one of the capsules 171, 172 has a leak detector 22, wherein the leak detector 22 is equipped with a pressure sensor 23. The fins 16 of the heat transfer element 11 are connected directly to the outer pipes 24 for the purpose of heat transfer, so that the heat taken up inside the switch cabinet 300 is first given off to the thermofluid 26 and then to the coolant 12.

FIG. 3 shows an air conditioner arrangement 200 which is housed for the purpose of exchanging heat in a switch cabinet 300 or fastened to the switch cabinet 300, which accommodates a multiplicity of electronic components 31. The air conditioner arrangement 200 includes a housing 30 which includes cabinet side housing region 301 and an external housing region 302, as well as a partition wall 37 arranged between the cabinet side housing region 301 and the external housing region 302, which partition wall separates the cabinet side housing region 301 and the external housing region 302 from each other fluidically. Here, the air conditioner arrangement 200 further comprises a heat exchanger 100, which is arranged entirely in the cabinet side housing region 301. The heat exchanger 100 is embodied as an evaporator 101 of a compression refrigeration machine 33 which comprises a compressor 34, a condenser 35 and a throttling device 36, wherein the compressor 34, the condenser 35 and the throttling device 36 are arranged in the external housing region 302 of the air conditioner arrangement 200. The coolant inflow 19 and the coolant outflow 20 of the heat exchanger 100 pass through the partition wall 37. In this context, sections of the capsules 171, 172 lie against the partition wall 37. The heat exchanger 100 is force-ventilated by means of a fan 32.

Claims

1. A heat exchanger, in particular a heat exchanger for air conditioning in a switch cabinet, with a pipe system that is configured to transport a coolant and comprises multiple pipe pieces and at least one pipe piece connector element, wherein the at least one pipe piece connector element connects two or more end sections of the pipe pieces to each other fluidically, and with a heat transfer element that is preferably embodied as a fin arrangement with a multiplicity of fins, wherein the heat transfer element accommodates the pipe pieces of the pipe system in such a manner that the end sections of the pipe pieces protrude from the heat transfer element, wherein the heat exchanger comprises at least one capsule, wherein end sections of the pipe pieces of the pipe system open into the at least one capsule, so that the at least one pipe piece connector element is arranged inside the at least one capsule.

2. The heat exchanger according to claim 1, wherein two capsules, are provided, between which the heat transfer element is arranged, wherein the end sections of the pipe pieces of the pipe system each open into one of the capsules, wherein at least one pipe piece connector element is arranged in each of the two capsules.

3. The heat exchanger according to claim 1, wherein the at least one pipe piece connector element comprises multiple pipe bends, wherein each of the pipe bends connects two end sections of two pipe pieces to each other fluidically.

4. The heat exchanger according to claim 1, wherein the pipe pieces and the at least one pipe piece connector element are connected materially coherent to each other via connection points, wherein the connection points are each arranged inside one of the capsules.

5. The heat exchanger according to claim 1, wherein the pipe pieces have a curvature that is less than or equal to 90°, in particular less than or equal to 45°, relative to their respective longitudinal axis.

6. The heat exchanger according to claim 1, wherein the pipe pieces are without curvature relative to their respective longitudinal axis.

7. The heat exchanger according to claim 3, wherein the pipe bends have a bending between 170° and 190°, preferably substantially 180°, particularly preferably 180°.

8. The heat exchanger according to claim 1, wherein a first pipe piece is connected to a coolant inflow and a second pipe piece is connected to a coolant outflow.

9. The heat exchanger according to claim 1, wherein the coolant is combustible and/or potentially explosive, and/or that the coolant is or contains propane, butane, isobutane or propene.

10. The heat exchanger according to claim 1, wherein the fins of the heat transfer element are connected directly to the pipe pieces for the purpose of heat transfer, wherein preferably the at least one capsule is filled with a fluid, preferably with a gas, particularly preferably with air, or with a liquid, preferably with water.

11. The heat exchanger according to claim 10, wherein the at least one capsule is configured to be fluid-impermeable and/or gas-impermeable.

12. The heat exchanger according to claim 1, wherein at least one of the capsules, in particular each capsule, includes a leak detector, wherein the leak detector preferably comprises a pressure switch and/or a pressure sensor and/or a fluid sensor, in particular a liquid sensor and/or a gas sensor.

13. The heat exchanger according to claim 1, wherein the pipe pieces are each encircled by an outer pipe in such a way that an annular space is created between the pipe pieces and the associated outer pipes, which space is configured to transport a liquid, in particular a thermofluid, wherein preferably the pipe pieces and the associated outer pipes are arranged coaxially with each other.

14. The heat exchanger according to claim 13, wherein the heat exchanger includes two capsules, wherein the outer pipes have end sections, each of which opens into one of the capsules, so that the capsules are connected to each other fluidically via the annular spaces, wherein preferably the pipe pieces with the associated outer pipes are connected to each other via spacers, in particular via spacer discs, wherein the outer pipes preferably have recesses, in particular drillholes, via which the annular spaces are connected fluidically to the capsules.

15. The heat exchanger according to claim 13, wherein the at least one capsule includes a leak detector, wherein the leak detector preferably comprises a pressure switch and/or a pressure sensor and/or a liquid sensor and/or a gas sensor, wherein preferably the fins of the heat transfer element are connected directly to the outer pipes for the purpose of heat transfer.

16. The heat exchanger according to claim 15, wherein the heat exchanger is embodied as an evaporator of a compression refrigeration machine.

17. An air conditioner arrangement for a switch cabinet, in particular for use with a switch cabinet, wherein the air conditioner arrangement includes a housing that has a cabinet side housing region and an external housing region, and a partition wall arranged between the cabinet side housing region and the external housing region, which separates the cabinet side housing region and the external housing region from each other fluidically, wherein the air conditioner arrangement further comprises a heat exchanger according to claim 1, wherein the heat exchanger, is arranged in particular entirely in the cabinet side housing region.

18. The air conditioner according to claim 17, wherein the heat exchanger is embodied as an evaporator of a compression refrigeration machine which comprises a compressor, a condenser and a throttling device, wherein the compressor, the condenser and the throttling device are arranged in the external housing region of the air conditioner.

19. The air conditioner according to claim 17, wherein the coolant inflow and the coolant outflow pass through the partition wall, and/or wherein sections of the at least one capsule lie against the partition wall and/or form the partition wall.

20. A switch cabinet with a housing that accommodates a multiplicity of electronic components, wherein the switch cabinet contains a heat exchanger and/or an air conditioner arrangement according to claim 1.