Heat exchanger, air conditioning equipment and switch cabinet

Abstract

The invention relates to a heat exchanger (100), in particular a heat exchanger (100) for air conditioning in a switchgear cabinet (300), having a piping system (10), which is configured to convey a coolant (12) and comprises a plurality of tubes (13) and at least one tube connector element (14), wherein the at least one pipe connector element (14) fluidly connects the two end sections (151, 152) of the pipes (13) to each other; and a heat transfer element (11), preferably embodied as a finned device (111) having a plurality of fins (16), in which the heat transfer element (11) accommodates the tubes (13) of the piping system (10) in such a way that the end sections (151, 152) of the tubes (13) protrude from the heat transfer element (11). Furthermore, at least one capsule (171, 172) is provided, the end sections (151, 152) of the pipes (13) of the piping system (10) opening into the at least one capsule (171, 172), so that the at least one pipe connector element (14) is arranged inside the at least one capsule (171, 172).

Description

Technical Field

[0001] The present invention relates to a heat exchanger, and more particularly to a heat exchanger configured for air conditioning in a switch cabinet, wherein the air conditioning unit includes a housing and a partition wall element, the housing having a cabinet-side housing region and an outer housing region, the partition wall element being disposed between the cabinet-side housing region and the outer housing region and fluidly isolating the cabinet-side housing region and the outer housing region, and the heat exchanger being equipped with a piping system configured to transport a coolant.

[0002] The present invention also relates to an air conditioning device for switch cabinets, and more particularly to an air conditioning device for use with switch cabinets.

[0003] The present invention also relates to a switch cabinet having a housing that accommodates multiple electronic components. Background Technology

[0004] The switchgear discussed here houses multiple electronic components configured to control process equipment, machine tools, or other manufacturing equipment. Commonly installed electronic components include power lines, terminals, resistors, capacitors, diodes, transistors, inductors, integrated circuits, relays, sensors, and more. During the specified normal operation of the switchgear, heat is generated and must be effectively dissipated to ensure the long-term functionality of the electrical components. In conventional switchgear, a specific type of heat exchanger with a piping system and / or an air conditioning unit with such a system is installed for this purpose. This piping system is configured to transport coolant and includes multiple pipes and bends, each of which fluidly connects the two ends of two pipes to each other. In this respect, the piping system forms a pipe coil in which coolant circulates, absorbing heat from inside the switchgear and dissipating it to the outside. To effectively remove heat, airflow is generated within the internal circuit and inside the switchgear, and this airflow impacts the heat exchanger. The internal circuit or the interior of the switchgear is isolated from the external circuit or the surrounding environment, preventing gas from entering the switchgear.

[0005] According to existing technology, the use of fluorinated greenhouse gases as coolants is specifically known. While these gases are thermodynamically advantageous for heat dissipation, leaks can release them into the surrounding atmosphere, contributing to adverse climate effects. Particularly leak-prone areas in such piping systems are bends with curvatures greater than 90°, and connection points, particularly the welds between bends and fittings. In this respect, conventional heat exchanger piping systems have leak-prone areas at every bend, such as the bend itself and each of the two connection points with the fitting located there. Therefore, the use of fluorinated greenhouse gases as coolants must be discontinued as soon as possible, and alternative coolants must be used in the future.

[0006] For thermodynamic reasons, the alternative coolants that can be used effectively are typically flammable and / or highly flammable, or exhibit high operating pressures during transcritical operation. In order to ensure the safe and compliant use of such coolants in switchgear air conditioning systems, it is specifically essential to ensure that the design of the internal circuits of the switchgear is inherently safe. In this context, it must be ensured that even in the event of a leak, the escaping coolant (particularly in the evaporator area) does not create an explosive atmosphere, as such an atmosphere could be ignited by electronic components within the switchgear. Summary of the Invention

[0007] Based on the above, the object of the present invention is to provide a heat exchanger, an air conditioning unit, and a switch cabinet that can safely operate the heat exchanger with flammable and / or highly flammable refrigerants or with refrigerants exhibiting high operating pressures during transcritical operation. The present invention also aims to reduce the number of leak-prone areas.

[0008] In a first aspect, this objective is achieved by a heat exchanger, specifically a heat exchanger for an air conditioning unit configured for regulating air in a switch cabinet, wherein the air conditioning unit has a housing and a partition wall element, the housing having a cabinet-side housing region and an outer housing region, the partition wall element being arranged between the cabinet-side housing region and the outer housing region and fluidly isolating the cabinet-side housing region and the outer housing region, and having a piping system configured to transport coolant, wherein the piping system includes a first manifold and a second manifold and a plurality of pipe elements, the free ends of which open into the manifold, wherein at least one of the manifolds has a coolant inlet and at least one of the manifolds has a coolant outlet, the coolant inlet and the coolant outlet being fluidly connected to each other via the piping system, wherein the pipe elements are connected to two mounting plates placed at a certain distance from each other, the two mounting plates surrounding the pipe elements in an airtight manner, such that the heat exchanger can be mounted on the partition wall element, resulting in the manifold being arranged in the outer housing region and the pipe elements being arranged at least partially in the cabinet-side housing region in the installed state.

[0009] This objective is also achieved by an air conditioning unit for switch cabinets, specifically by an air conditioning unit for use with switch cabinets, wherein the air conditioning unit includes a housing and a partition wall element, the housing having a cabinet-side housing region and an outer housing region, the partition wall element being disposed between the cabinet-side housing region and the outer housing region and fluidly isolating the cabinet-side housing region and the outer housing region, wherein the air conditioning unit also includes such a heat exchanger.

[0010] This objective is also achieved by a switch cabinet having a housing that accommodates multiple electronic components, wherein the switch cabinet contains such a heat exchanger and / or such an air conditioning unit.

[0011] Due to the configuration of the heat exchanger, air conditioning unit, and switchgear according to the invention, during proper use, only the leak-free components of the heat exchanger are arranged within the cabinet-side housing area of ​​the air conditioning unit. Conversely, leak-prone areas are arranged within the outer housing area of ​​the air conditioning unit, ensuring that the internal circuits and interior of the switchgear are not contaminated by flammable and / or highly flammable gases. Therefore, the heat exchanger according to the invention, the air conditioning unit according to the invention, and the switchgear according to the invention allow for the safe use of this coolant. Furthermore, the number of leak-prone areas is significantly reduced because the heat exchanger is advantageously constructed without any bends, and the number of leak-prone areas at least reduces the number of bends that would otherwise be required.

[0012] Advantageous further improvements to the invention will be described in the following text and dependent claims.

[0013] According to an advantageous further improvement of the invention, the pipe elements and manifolds are configured to be connected to each other via a connection point by material bonding. Specifically, the pipe elements and manifolds are configured to be welded to each other via the connection point.

[0014] Tubular elements are preferably embodied individually as fittings or bundles. A fitting has a generally cylindrical sheath and a single channel passing through the fitting along a longitudinal axis. In contrast, a bundle comprises multiple channels or capillaries (microchannels) arranged parallel to each other. In a simple embodiment, such a bundle is constructed of a flat profile through which multiple channels pass along a longitudinal axis.

[0015] To effectively remove heat, the heat exchanger is preferably equipped with heat transfer elements, specifically finned devices having multiple fins or slats that are in thermally conductive contact with and / or connected to the tube elements. During proper use, airflow passes over the tube elements and fins, resulting in heat transfer from the airflow to the heat exchanger. For this purpose, the fins are specifically connected to the tube elements by non-positive locking or material bonding to form a thermally conductive connection. The fins are preferably corrugated and arranged between every two tube elements. This corrugated profile has alternating crests and troughs that are configured as contact surfaces on the tube elements. Flow paths configured and designed to guide airflow are formed between every two adjacent crests and between every two adjacent troughs. These flow paths preferably extend transversely to the tube elements. Additionally, the fins may preferably have slits and / or may be shaped.

[0016] According to a further advantageous improvement, one of the mounting plates is positioned between the fins and the manifold in every case. Therefore, the fins are surrounded by the side wings of the mounting plate on both the left and right sides.

[0017] The path of the coolant from the coolant inlet to the coolant outlet through the piping system can take various forms. Preferably, the coolant inlet and coolant outlet are located on the same manifold or on different manifolds.

[0018] According to the first embodiment, the coolant inlet and coolant outlet are located on separate manifolds. The coolant then flows only from the first manifold to the second manifold. Therefore, the coolant flows through the tube element only once during its passage through the heat exchanger before being transported out of the heat exchanger. In this case, the coolant flow rate is relatively slow because the effective cross-sectional area of ​​the tube element is relatively large.

[0019] Alternatively, the coolant path through the piping system may follow a tortuous route, and for this purpose, each manifold may contain multiple partition walls that divide the manifold into multiple compartments. These partition walls are arranged such that coolant can be repeatedly directed from coolant inlet to coolant outlet through at least one manifold. Depending on the number of partition walls, the coolant flow rate increases as the effective cross-sectional area of ​​the opening decreases.

[0020] When both the coolant inlet and coolant outlet are located on the first manifold, and neither a coolant inlet nor a coolant outlet is located on the second manifold, the number of partition walls N in the first manifold and the number of partition walls M in the second manifold are preferably expressed as: M = N - 1. When the coolant inlet and coolant outlet are located on different manifolds, the number of partition walls N in the first manifold and the number of partition walls M in the second manifold are preferably expressed as: M = N.

[0021] The tube elements preferably have no curvature relative to their respective longitudinal axes. This results in a substantially linear heat exchanger that can be easily installed inside an air conditioning unit. Alternatively, the tube elements have a curvature of less than or equal to 90°, specifically less than or equal to 45°, relative to their respective longitudinal axes. This allows the heat exchanger to be adapted to the specific geometry of the switchgear, which is necessary for the installation space.

[0022] The manifolds, pipe elements, fins, and / or mounting plates are preferably made of aluminum and welded together at the connection points. Aluminum has high thermal conductivity, making it ideal for use as a heat exchanger.

[0023] The coolant inlet and / or coolant outlet may be formed by tubular short sections, specifically connected to the manifold. The coolant inlet and / or coolant outlet may also preferably be made of copper.

[0024] The housing of the air conditioning unit preferably houses the heat exchanger in such a manner that the manifold is arranged in the outer housing region, and at least a portion of the pipe element (preferably more than 60% of its total length, particularly preferably more than 80%) is arranged in the cabinet-side housing region. Specifically, portions connected to at least one of the fins are arranged in the cabinet-side housing region. For this purpose, the partition wall element of the housing preferably has at least two openings or cutouts through which the heat exchanger passes in the assembled state. Within the scope of embodiments with two openings, the first opening is preferably configured to be larger than the second opening, which facilitates the installation of the heat exchanger. For this purpose, one mounting plate is configured to be larger than the other mounting plate, which allows the heat exchanger to be introduced into the opening. This means that, relative to the insertion direction of the heat exchanger, one mounting plate is wider and higher than the other, such that the smaller of the two mounting plates can be introduced through the opening in the partition wall element, while the larger of the two mounting plates is located on the periphery of the opening. Within the scope of embodiments with two cutouts, the heat exchanger is preferably configured to be introduced into the cutout from the side. The cutout forms an open profile on one side and is created within the partition wall element. With the heat exchanger positioned within the cutout, the cutout can be sealed in a fluid-tight manner using a cover element.

[0025] Specifically, screw or riveted connections are provided for mounting the heat exchanger, and the mounting plate and partition wall elements include pre-drilled holes for this purpose. Preferably, gaskets are arranged between the mounting plate and each partition wall element to allow for airtight mounting of the heat exchanger. Separately, a fan is preferably provided and arranged and configured within the air conditioning unit for forced ventilation.

[0026] The coolant is typically flammable and / or potentially explosive. Specifically, the coolant is or contains propane, butane, isobutane, or propylene.

[0027] Regardless of the specific implementation of the heat exchanger, it can be embodied as the evaporator of a compression refrigeration machine. A compression refrigeration machine is a type of refrigeration machine that utilizes the physical effect of the increase in enthalpy difference during the transition of the coolant's state of mass from liquid to gas. The circulating coolant undergoes various changes in its state of mass sequentially. This utilizes the fact that the coolant's condensation and boiling temperatures vary according to its pressure. The coolant in the gas phase is first compressed by the compressor, resulting in an increase in boiling temperature and pressure. In the downstream condenser, it condenses and releases heat. Then, the liquid coolant is released through a throttling device, where the boiling temperature decreases. In the subsequent evaporator, the coolant evaporates and absorbs heat at a low temperature, thus closing the loop. Attached Figure Description

[0028] In the following text, specific embodiments of the invention will be explained with reference to the accompanying drawings. In the drawings:

[0029] Figure 1a This is a first cross-sectional view of the first heat exchanger;

[0030] Figure 1b This is a second cross-sectional view of the first heat exchanger along cross section AA;

[0031] Figure 1c This is a third cross-sectional view of the first heat exchanger along cross section BB;

[0032] Figure 1d These are two cross-sectional views of the first heat exchanger along cross section CC;

[0033] Figure 2 This is a cross-sectional view of the second heat exchanger;

[0034] Figure 3 This is a cross-sectional view of the third heat exchanger;

[0035] Figure 4a This is a cross-sectional view of the fourth heat exchanger;

[0036] Figure 4b This is a cross-sectional view of the fifth heat exchanger.

[0037] Figure 5a , 5b This is a cross-sectional view of the first air conditioning unit with a switch cabinet; and

[0038] Figure 6a , 6b This is a cross-sectional view of a second air conditioning unit with a switch cabinet. Detailed Implementation

[0039] Figure 1a A first embodiment of a heat exchanger 100 of an air conditioning unit 200 is shown, the air conditioning unit being configured for air conditioning in a switch cabinet 300. Figure 5a , Figure 5b and Figure 6a , Figure 6b Each embodiment of the air conditioning unit 200 is shown, and each embodiment has a switch cabinet 300 (partially shown). The air conditioning unit 200 has a housing 16 and a partition wall element 32, the housing having a cabinet-side housing region 161 and an outer housing region 162, the partition wall element being arranged between the cabinet-side housing region 161 and the outer housing region 162 and fluidly isolating the cabinet-side housing region 161 and the outer housing region 162 from each other.

[0040] The heat exchanger 100 has a piping system 10 configured to transport refrigerant. For this purpose, the piping system 10 has a first manifold 111, a second manifold 112, and eight pipe elements 12, the free ends of which open into the manifolds 111 and 112. In the illustrated embodiment, the first manifold 111, shown on the left, has a refrigerant inlet 13, and the manifold 112, shown on the right, has a refrigerant outlet 14; they are connected to each other in a fluid-conducting manner. The pipe elements 12 are connected to two mounting plates 151 and 152, which are spaced apart from each other and hermetically surround the pipe elements 12. This allows the heat exchanger 100 to be mounted on the partition wall element 32 of the air conditioning unit 200 in such a way that the manifolds 111 and 112 are arranged in the outer casing area 162, and at least a portion of the pipe elements 12 is arranged in the cabinet-side casing area 161. The pipe elements 12 and the manifolds 111 and 112 are bonded together via connection points 17. In the exemplary embodiment shown, these tube elements 12 are each embodied as a tube bundle 121, wherein each tube bundle 121 includes a plurality (8) of channels 18 arranged parallel to each other. Figure 1b , Figure 1c ).

[0041] To dissipate heat, the heat exchanger 100 is equipped with a heat transfer element in the form of a finned assembly having multiple fins 19 thermally connected to the tube elements 12. During proper use, airflow passes through the tube elements 12 and the fins 19, transferring heat from the airflow to the heat exchanger 100. In the illustrated embodiment, the fins 19 have a corrugated design and are arranged between every two tube elements 12. This corrugated profile has alternating crests 20 and troughs 21, which are configured as contact surfaces on the tube elements. Flow paths 22, configured and designed to guide airflow, are formed between every two adjacent crests 20 and between every two adjacent troughs 21. These flow paths 22 extend perpendicular to the tube elements 12. Mounting plates 151, 152 are arranged between the fins 19 and the manifolds 111, 112, located to the left and right of the fins 19. Mounting plate 151 (shown on the left) Figure 1a , Figure 1b () is larger than the mounting plate 152 shown on the right. Figure 1a , Figure 1c Therefore, the heat exchanger 100 can be pushed into the opening 231. Figure 1d Two alternative embodiments of the heat exchanger 100 along cross section CC are shown in top view. According to the figure, manifolds 111, 112 may be circular (alternative a) or rectangular (alternative b). The coolant inlet 13 and coolant outlet 14 of the heat exchanger 100 may be arranged on the same manifolds 111, 112 or on different manifolds 111, 112, depending on their construction type. Figure 1a An embodiment is shown in which the coolant inlet 13 and coolant outlet 14 are implemented on different manifolds 111, 112. In this way, coolant is guided from coolant inlet 13 to coolant outlet 14 via first manifold 111, pipe element 12 and second manifold 112. Therefore, coolant flows uniformly through pipe element 12 in one direction.

[0042] Figure 2 A second exemplary embodiment of the heat exchanger 100 is shown, wherein the manifold 111 shown on the left has a partition wall 24 between four top pipe elements 12 and four bottom pipe elements 12, resulting in the manifold 111 having two compartments 25. The four pipe elements 12 open into each of the two compartments 25. The manifold 112 on the right has no partition wall. Therefore, a coolant inlet 13 and a coolant outlet 14 are implemented on the manifold 111 shown on the left, and coolant flows through the pipe elements 12 at least once in both directions.

[0043] Figure 3A third exemplary embodiment of the heat exchanger 100 is shown, wherein the manifold 111 shown on the left has two partition walls 24, such that the manifold 111 has three compartments 25. On the other hand, the manifold 112 shown on the right has only one partition wall 24, so the manifold 112 has two compartments 25, and the coolant inlet 13 and coolant outlet 14 are arranged on the same manifold 111.

[0044] Figure 4a A fourth exemplary embodiment of the heat exchanger 100 is shown, wherein the manifold 111 shown on the left has four partition walls 24, thus the manifold 111 has five compartments 25. On the other hand, the manifold 111 shown on the right has only three partition walls 24, such that the coolant inlet 13 and the coolant outlet 14 are arranged on the same manifold 111.

[0045] Figure 4b A fifth exemplary embodiment of a heat exchanger 100 with seven pipe elements 12 is shown, wherein the manifold 111 shown on the left has three partition walls 24, thus the manifold 111 has four compartments 25. The manifold 111 shown on the right also has three partition walls 24, so that the coolant inlet 13 and the coolant outlet 14 are arranged on separate manifolds 111.

[0046] As mentioned above, Figure 5a , Figure 5b and Figure 6a , Figure 6b Each embodiment of an air conditioning unit 200 having a switch cabinet 300 (partially shown) is shown. The air conditioning unit 200 includes a housing 16 and a partition wall element 32 having a cabinet-side housing region 161 and an outer housing region 162, the partition wall element being disposed between the cabinet-side housing region 161 and the outer housing region 162 and fluidly isolating the cabinet-side housing region 161 and the outer housing region 162 from each other.

[0047] Figure 5aA first assembly of an air conditioning unit 200 and a switch cabinet 300 is shown. The switch cabinet 200 has a switch cabinet housing 33 that houses a heat source in the form of multiple electronic components 26. The air conditioning unit 200 includes a heat exchanger 100 configured to remove heat from the switch cabinet housing 33. For this purpose, openings (not indicated by reference numerals) are provided between the switch cabinet 300 and the cabinet-side housing area 161 through which a convection flow 34 passes and transports heat. The heat exchanger 100 is forced to ventilate within the housing 16 of the air conditioning unit 200 by means of a fan 27, which enhances the convection flow 34 and improves the efficiency of the heat exchanger 100. The heat exchanger 100 is embodied as an evaporator 101 of a compressor 28, which includes a compressor 29, a condenser 30, and a throttling device 31 within the outer housing area 162. The partition wall element 32 of the housing 16 has two openings 231, 232, the size and position of which allow the heat exchanger 100 (in the illustrated exemplary embodiment, its pipe elements 12 have no curvature relative to their respective longitudinal axes) to pass through these openings 231, 232 in the assembled state. Meanwhile, the mounting plates 151, 152 are also different in size, with the relatively smaller mounting plate 152 installed in the cabinet-side region 161 of the housing 16 and the partition wall element 32 in the assembled state, and the relatively larger mounting plate 151 installed in the outer housing region 162 of the housing 16 and the partition wall element 32. The housing 16 accommodates the heat exchanger 100 in such a way that the manifolds 111, 112 are arranged in the outer housing region 162, and a portion of the pipe elements 12 is arranged in the cabinet-side housing region 161 of the housing 16, meaning that all leak-prone areas are completely arranged in the outer housing region 162 of the housing 16. In this way, coolant is prevented from entering the switch cabinet 300 in the event of a leak.

[0048] Figure 5b This is a schematic representation of the installation of the heat exchanger 100. For this purpose, the heat exchanger can be introduced into the housing 16 of the air conditioning unit 200 in a linear manner along the direction of arrow P1 until the mounting plates 151, 152 are supported on and fixed thereto by the housing 16 and the partition wall element 32.

[0049] Figure 6a This illustrates a second assembly of the air conditioning unit 200 and the switch cabinet 300 in their assembled state. The construction and operating principle of the air conditioning unit 200 and the switch cabinet 300 are consistent with those described above. Figure 5a The implementation scheme is similar in structure and working principle. Unlike this version, according to... Figure 6aThe partition wall element 32 of the air conditioning unit 200 has two openings 231, 232, which are aligned at an angle to each other due to space constraints. To ensure that the heat exchanger 100 can be installed here, its pipe elements 12 have a curvature of 90° relative to their respective longitudinal axes, so that the heat exchanger 100 passes through the two openings 231, 232 in the assembled state. The mounting plates 151, 152 are also different in size, with the relatively smaller mounting plate 152 installed in the cabinet-side area 161 of the housing 16 and the partition wall element 32 in the assembled state, and the relatively larger mounting plate 151 installed in the outer housing area 162 of the housing 16 and the partition wall element 32. The housing 16 accommodates the heat exchanger 100 in such a way that the manifolds 111, 112 are arranged in the outer housing area 162, and a portion of the pipe elements 12 is arranged in the cabinet-side housing area 161 of the housing 16, which means that all leakage-prone areas are completely arranged in the outer housing area 162 of the housing 16. In this way, coolant is prevented from entering switch cabinet 300 in the event of a leak.

[0050] Figure 6b This is a schematic representation of the installation of the heat exchanger 100. For this purpose, the heat exchanger can be introduced into the housing 16 of the air conditioning unit 200 in the direction of the bend of arrow P2 until the mounting plates 151, 152 are supported against the housing 16 and the partition wall element 32 and fixed there.

[0051] List of reference numerals

[0052] 100 heat exchanger

[0053] 200 air conditioning unit

[0054] 300 switchgear

[0055] 10 Piping System

[0056] 111 manifold

[0057] 112 manifold

[0058] 12-tube component

[0059] 121 tube bundle

[0060] 13 Coolant Inlet

[0061] 14 Coolant outlet

[0062] 151 mounting plate

[0063] 152 mounting plate

[0064] 16. Outer shell

[0065] 161 Cabinet Side Shell Area

[0066] 162 External Shell Area

[0067] 17 Connection Points

[0068] 18 channels

[0069] 19 Fins

[0070] 20 peaks

[0071] 21 troughs

[0072] 22 flow path

[0073] 231 opening

[0074] 232 opening

[0075] 24. Partition wall

[0076] 25 cabins

[0077] 26 Electronic components

[0078] 27 Fans

[0079] 28 Compressor Refrigeration Unit

[0080] 29 Compressor

[0081] 30 Condenser

[0082] 31 Throttling equipment

[0083] 32. Partition wall element

[0084] 33 Switchgear enclosure

[0085] 34 Convection flow

[0086] 101 Evaporator

[0087] P 1,2 Arrow direction

Claims

1. Heat exchanger (100), in particular for an air conditioning device (200) configured for air conditioning in a switchgear cabinet (300), wherein the air conditioning device (200) comprises a housing (16) having a cabinet-side housing region (161) and an outer housing region (162), and a partition wall element (32) arranged between the cabinet-side housing region (161) and the outer housing region (162) and fluidically isolating the cabinet-side housing region (161) and the outer housing region (162) from each other, the heat exchanger (100) being equipped with a duct system (10) configured to transport a coolant, characterized in that, The pipe system (10) has a first manifold (111) and a second manifold (112) and a plurality of pipe elements (12), the free ends of which open into the manifolds (111, 112), wherein at least one of the manifolds (111, 112) has a coolant inlet (13) and at least one of the manifolds (111, 112) has a coolant outlet (14), which are connected to one another in a fluid-conducting manner by the pipe system (10), wherein the pipe elements (12) are connected with two mounting plates (151, 152), which are arranged at a distance from one another and surround the pipe elements (12) in a gas-tight manner, so that the heat exchanger (100) can be installed in the partition wall element (32) in such a way that, in the assembled state, the manifolds (111, 112) are arranged in the outer housing region (162) and at least parts of the pipe elements (12) are arranged in the cabinet-side housing region (161).

2. Heat exchanger (100) according to claim 1, wherein the pipe elements (12) and the manifolds (111, 112) are connected to one another by material bonding via connection points (17).

3. Heat exchanger (100) according to one of the preceding claims, wherein each of the pipe elements (12) is embodied as a tube insert or tube bundle (121), wherein a tube bundle (121) comprises a plurality of channels (18) arranged parallel to one another.

4. Heat exchanger (100) according to any one of the preceding claims, which is equipped with heat transfer elements, in particular fin devices with a plurality of fins (19), which are connected in a thermally conductive manner with the pipe elements (12), wherein preferably the fins (19) are of a wave-like configuration and are arranged between every two pipe elements (12).

5. Heat exchanger (100) according to claim 4, wherein one of the mounting plates (151, 152) is arranged in each case between the fins (19) and the manifolds (111, 112).

6. Heat exchanger (100) according to any one of the preceding claims, wherein the coolant inlet (13) and the coolant outlet (14) are arranged on the same manifold (111, 112) or on different manifolds (111, 112).

7. Heat exchanger (100) according to any one of the preceding claims, wherein the manifolds (111, 112) each comprise a plurality of partition walls (24), which divide the manifolds (111, 112) into a plurality of compartments (25), wherein the partition walls (24) are arranged in such a way that the coolant can be guided through at least one of the manifolds (111, 112) from the coolant inlet (13) to the coolant outlet (14) a plurality of times.

8. Heat exchanger (100) according to claim 7, wherein the coolant inlet (13) and the coolant outlet (14) are arranged on the same manifold (111, 112), wherein the number of partition walls (24) in the first manifold (111), N, and the number of partition walls (24) in the second manifold (112), M, are represented as: M = N - 1.

9. Heat exchanger (100) according to claim 7, wherein the coolant inlet (13) and the coolant outlet (14) are arranged on different manifolds (111, 112), wherein the number of partition walls (24) in the first manifold (111), N, and the number of partition walls (24) in the second manifold (112), M, are represented as: M = N.

10. Heat exchanger (100) according to any of the preceding claims, wherein the tube elements (12) have a curvature relative to their respective longitudinal axis of less than or equal to 90°, in particular less than or equal to 45°.

11. Heat exchanger (100) according to any of claims 1 to 11, wherein the tube elements (12) have no curvature relative to their respective longitudinal axis.

12. Heat exchanger (100) according to any of the preceding claims, wherein the manifolds (111, 112), the tube elements (12), the fins (19) and the mounting plates (151, 152) are made of aluminum and are welded to each other at the connection points (17).

13. Heat exchanger (100) according to any of the preceding claims, wherein one of the mounting plates (151, 152) is larger than the other one of the mounting plates (151, 152), such that the heat exchanger (100) can be introduced into a housing opening (231, 232), in particular into an opening (231, 232) in the housing (16) of the air conditioning device (200).

14. Heat exchanger (100) according to any of the preceding claims, wherein the coolant is flammable and / or potentially explosive and / or the coolant is or comprises propane, butane, isobutane or propylene.

15. The heat exchanger (100) according to any one of claims 1 to 14, characterized in that The heat exchanger (100) is embodied as an evaporator (101) of a compression refrigeration machine (28).

16. Air conditioning device (200) for a switchgear cabinet (300), in particular for use with a switchgear cabinet (300), characterized in that The air conditioning device (200) comprises a housing (16) having a cabinet-side housing region (161) and an outer housing region (162), and a partition wall element (32) arranged between the cabinet-side housing region (161) and the outer housing region (162) and fluidically isolating the cabinet-side housing region (161) from the outer housing region (162) from each other, wherein the air conditioning device (200) further comprises a heat exchanger (100) according to any of the preceding claims.

17. The air conditioning apparatus (200) according to claim 16, characterized by The housing (16) accommodates the heat exchanger (100) in such a way that the manifolds (111, 112) are arranged in the outer housing region (162) and at least parts of the tube elements (12) are arranged in the cabinet-side housing region (161).

18. The air conditioning apparatus (200) according to any one of claims 16 or 17, characterized by, The partition wall element (32) has at least two openings (231, 232) or cutouts, through which the heat exchanger (100) passes in the assembled state.

19. The air conditioning apparatus (200) according to any one of claims 16 to 18, characterized by A fan (27) arranged and configured inside the housing (16) to provide forced ventilation of the heat exchanger (100).

20. Switchgear cabinet (300) having an enclosure (33) accommodating a plurality of electronic components (26), characterized in that The switchgear cabinet (300) comprises a heat exchanger (100) according to any one of claims 1 to 15 and / or an air conditioning device (200) according to any one of claims 16 to 19.

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