Cooling arrangement for a compressor comprising an air bearing of a fuel cell system for a vehicle, in particular commercial vehicle, compressor, fuel cell system, vehicle

Abstract

Cooling arrangement (100) for a compressor (210) comprising an air bearing (280) of a fuel cell system (205) for a vehicle (200a), in particular a commercial vehicle (200b), wherein the cooling arrangement (100) comprises: a housing body (110) with a shell surface (130) for arranging a stator (215) in a stator space (114) enclosed by the housing body (110) and bounded by the shell surface (130) and with a cooling section (125) coolable by a coolant (235), a coolant channel (120) through which the coolant (235) flows, and an air duct (140) for guiding a cooling air flow (145) for cooling the air bearing (280), wherein the coolant channel (120) in the cooling section (125) is at least partially formed through the housing body (110) and is used for cooling the shell surface (130) is arranged, and the air guide channel (140) is arranged inside the coolant channel (120).

Description

[0001] The present disclosure relates to a cooling arrangement for a compressor comprising an air bearing of a fuel cell system for a vehicle, in particular a commercial vehicle. The disclosure also relates to a compressor for a fuel cell system of a vehicle, in particular a commercial vehicle, comprising a cooling arrangement, a stator arranged in a stator chamber encompassed by a housing body, a rotor and an air bearing, a fuel cell system for a vehicle, in particular a commercial vehicle, comprising a compressor and a fuel cell stack to which an air flow can be applied by the compressor, and a vehicle, in particular a commercial vehicle, comprising a fuel cell system, a compressor and / or a cooling arrangement.

[0002] Compressors or compressors as flow machines for supplying an air stream to a fuel cell stack of a fuel cell system and such fuel cell systems are generally known.

[0003] In a fuel cell system, the compressor is used to suck in air, compress it, and supply it to a cathode-side fuel cell inlet of the fuel cell stack to carry out the fuel cell reaction. The compressed mixture of substances passes through the stack or stacks. The mixture of substances remaining after the fuel cell reaction exits as a gaseous fluid stream on the cathode side from a cathode-side fuel cell outlet of the fuel cell stack.

[0004] To operate the compressor, electrical energy is converted. Heat is generated during the conversion of electrical energy into mechanical energy and during the compression of the air. Furthermore, the compressor typically has a rotor mounted on an air bearing. The rotor's bearings can also generate heat.

[0005] The thermal load on the fuel cell system's compressor can be high due to the heat generated. Typically, such compressors are cooled using water as the coolant or cooling medium. The water can be channeled through a coolant channel in the housing assembly to absorb and dissipate the generated heat. The coolant channel can be designed as an elongated opening through which the coolant can flow, or as a cavity in the otherwise typically solid housing body. Additionally, air from an intercooler can be blown into the compressor to cool the rotor and bearing(s).

[0006] To reduce material and weight in the production of a turbomachine housing, it is desirable to use the thinnest possible cast component for the housing body. Such a cast component can be provided with cooling channels through which a cooling medium can flow to cool the component. However, the thinner the cast component, the more susceptible the cooled housing body is to leaks.

[0007] Patent application DE 10 2023 103 724.2, which was not yet published on the filing date of the present disclosure, describes a cooling arrangement for a compressor of a fuel cell system for a vehicle, in particular a commercial vehicle, the cooling arrangement comprising: a housing body with a casing body for arranging a stator in a stator chamber encompassed by the casing body and with a cooling section that can be cooled by a cooling fluid, the housing body having a casing surface that delimits the stator chamber and the casing body from one another, the cooling arrangement comprising a tube through which the cooling fluid can flow, and the tube being cast into the cooling section within the casing body and arranged to cool the casing surface.

[0008] However, a technological challenge with regard to the compressor of a fuel cell system remains the cooling of the air bearing and / or the air bearings for supporting the rotor of the compressor. The cooling of the air bearing is typically achieved by a cooling air flow. This typically requires air pressure to overcome a pressure drop in the air bearing. The compressed air can, for example, be provided externally or branched off from an air flow of the compressor. However, air branched off from a first stage of the compressor with a suitable pressure ratio is too hot at around 200 °C to be used directly for cooling. One possibility is to provide an air flow parallel to a coolant channel for a liquid coolant. However, the arrangement of two channels within a compressor housing is complex.

[0009] The disclosure is therefore based on the object of enriching the prior art and providing an improved cooling arrangement. In particular, the disclosure solves the object of providing an improved cooling arrangement of a compressor for a fuel cell system for a vehicle, in particular a commercial vehicle, which enables improved cooling of the air bearing with improved sealing and more efficient production.

[0010] This object is achieved by a cooling arrangement according to claim 1 and the subject matter according to the further independent claims. The subclaims specify optional developments of the disclosure.

[0011] According to one aspect of the disclosure, a cooling arrangement is provided for a compressor of a fuel cell system for a vehicle, in particular a commercial vehicle, comprising an air bearing, the cooling arrangement comprising: a housing body with a lateral surface for arranging a stator in a stator chamber encompassed by the housing body and delimited by the lateral surface and with a cooling section that can be cooled by a cooling liquid, a cooling liquid channel through which the cooling liquid can flow, and an air guide channel for guiding a cooling air flow for cooling the air bearing, the cooling liquid channel being formed at least partially by the housing body in the cooling section and being arranged for cooling the lateral surface, and the air guide channel being arranged within the cooling liquid channel.

[0012] By cooling the outer surface by the coolant flowing through the coolant channel, heat transfer between the stator and the coolant can be achieved. Heat transferred from the stator to the housing body via the outer surface, which is the surface of the housing body facing the stator chamber, can be absorbed and dissipated by the coolant in the coolant channel.

[0013] It was recognized that the air bearing can be cooled by the cooling air flow. However, a partial mass flow that is diverted from the air already compressed by the compressor can be too hot. Therefore, it is proposed to cool the cooling air flow. The cooling of the cooling air flow is achieved by arranging the air duct within the cooling liquid channel. The cooling liquid can thus cool both the stator and the cooling air flow. This allows heat from the cooling air flow to be transferred to the cooling liquid. In other words, heat dissipation of the air in the cooling air flow into the cooling liquid can be achieved. This allows the air bearing to be efficiently supplied with a cooled cooling air flow. Optionally, several or all air bearings can be cooled in this way. In addition, a rotor can be cooled by the cooling air flow.

[0014] A cooling surface for the stator, defined by the coolant channel within the cooling section, can remain unchanged by integrating the air duct into the coolant channel, thus ensuring adequate cooling of the stator. Furthermore, the production of the air duct is less complicated than, for example, an arrangement of two geometrically independent channels, which are comparatively complex to produce even with a sand casting process.

[0015] Optionally, the air duct is arranged within the coolant duct in such a way that the coolant can flow around it. The fact that this air duct can be partially or completely surrounded by coolant, depending on its arrangement within the coolant duct, ensures effective heat dissipation from the air to be cooled to the coolant. The cooler the cooling air flow, the less cooling air flow needs to be used to cool the air bearing. This means that a lower air mass flow needs to be provided. This means less air can be diverted from the compressor, which can increase the overall efficiency of the compressor.

[0016] Optionally, the cooling liquid channel defines a cooling liquid flow direction, and the air duct defines an air flow direction, and the cooling liquid flow direction and the air flow direction are aligned parallel and / or opposite to each other. Thus, the cooling liquid and the cooling air flow have a parallel or opposite flow direction. This allows heat to be transferred from the air to the cooling liquid along the contours of the cooling liquid channel and the air duct.

[0017] Optionally, the compressor has a rotor; the rotor and / or the casing surface defines an axis and a circumferential direction, and the coolant channel and the air guide channel are each arranged along the axis and in the circumferential direction within the housing body, winding around the casing surface. In other words, the coolant channel and the air guide channel can each be helical, spiral, or a cooling spiral, respectively. The arrangement of the coolant channel and the air guide channel winding around the casing surface enables the heat generated by the compressor to be dissipated as evenly as possible via the cooling surface, the heat to be dissipated evenly by the coolant, and the air flow to be cooled evenly by the coolant.

[0018] Optionally, the housing body defines a circumferential direction, and the coolant channel and the air duct are each arranged completely around the housing body. This allows for the most even possible exchange of heat generated by the compressor across the cooling surface and the most even exchange of heat from the cooling air across the coolant.

[0019] Optionally, the air duct is designed as a tube. This allows for a tight seal of the air duct. A separate seal between the coolant duct and the air duct is thus unnecessary. Furthermore, the tight seal provided by the tube simplifies leak testing during the manufacturing of the housing body. This reduces the cycle time for manufacturing a cooling assembly. The tube solution enables the housing to be manufactured using a die-casting process.

[0020] Optionally, the air duct comprises a steel, copper, and / or aluminum alloy and / or a composite material. Aluminum can be used to form an air duct that is more corrosion-resistant and temperature-resistant with respect to the cooling liquid. An air duct made of a composite material optionally comprising a plastic can also enable a more flexible guiding and / or arrangement, especially for connecting the air duct. A composite material can have several of the above-mentioned effects. Alternatively, the air duct can be made of low-carbon steel to provide particularly high thermal conductivity and / or be coated to be corrosion-resistant. Alternatively, the air duct can be made of stainless steel or another steel alloy.

[0021] Optionally, the cooling arrangement has a housing shell, and the housing shell is arranged around the housing body such that the coolant channel is arranged between the housing shell and the housing body. Thereby, the coolant channel can be determined by the geometry of the housing shell and the housing body. The coolant channel can thus be effectively produced by casting.

[0022] Optionally, the cooling fluid channel has a plurality of turns, and the housing shell and the housing body are arranged so that they abut one another without the need for seals between the turns. It was recognized that a seal between the individual turns is not necessary. Therefore, the cooling fluid channel can be manufactured cost-effectively without seals. The plurality of turns allows the tube to provide a large surface area in the cooling section. Alternatively, the ends of the housings, i.e., the housing shell and the housing body, can be sealed to one another with seals.

[0023] According to one aspect of the disclosure, a compressor for a fuel cell system of a vehicle, in particular a commercial vehicle, is provided. The compressor comprises the cooling arrangement described above, a stator arranged in the stator space encompassed by the housing body, a rotor, and an air bearing. Optionally, the cooling arrangement can have one or more of the technical features described above in order to achieve an associated technical effect.

[0024] According to one aspect of the disclosure, a fuel cell system for a vehicle, in particular a commercial vehicle, is provided. The fuel cell system comprises the compressor described above and a fuel cell stack that can be subjected to an air flow by the compressor. Optionally, the compressor can have a cooling arrangement with one or more of the technical features described above in order to achieve an associated technical effect.

[0025] According to one aspect of the disclosure, a vehicle, in particular a commercial vehicle, is provided. The vehicle, in particular a commercial vehicle, comprises the fuel cell system described above, the compressor described above, and / or the cooling arrangement described above. Optionally, the cooling arrangement and / or the cooling arrangement of the compressor can have one or more of the technical features described above in order to achieve an associated technical effect.

[0026] Further advantages and features of the disclosure as well as their technical effects emerge from the figures and the description of the preferred embodiments shown in the figures. Fig. 1 a schematic representation of a vehicle, in particular a commercial vehicle, according to one aspect of the disclosure; Fig. 2 is a perspective view of a cooling assembly according to one aspect of the disclosure; Fig. 3 a section through a cooling arrangement according to one aspect of the disclosure; and Fig. 4 shows a detail of a section of a cooling arrangement according to an aspect of the disclosure.

[0027] Fig. 1 shows a schematic representation of a vehicle 200a, in particular commercial vehicle 200b, according to an embodiment of the disclosure.

[0028] The vehicle 200a, in particular the commercial vehicle 200b, is referred to below as vehicle 200a, 200b. The vehicle 200a, 200b is, for example, a land vehicle or a watercraft.

[0029] The vehicle 200a, 200b has a fuel cell system 205, an energy storage device 260, and an electric drive 250. The fuel cell system 205 is configured to provide electrical energy 65 to the energy storage device 260. The energy storage device 260 is, for example, a rechargeable energy storage device 260 and serves as a buffer battery for buffering electrical energy 65. The energy storage device 260 is connected to the electric drive 250 to supply the electric drive 250 with electrical energy 65 so that the electric drive 250 can drive the vehicle 200a, 200b. In addition, the fuel cell system 205 is connected to the electric drive 250 for the direct provision of electrical energy 65.

[0030] The fuel cell system 100 comprises a compressor 210, a fuel cell stack 206, and optionally an expander 270. The compressor 210 is configured to supply an air stream 240 to the cathode side of the fuel cell stack 206. For this purpose, the compressor 210 is configured to be supplied with electrical energy 65 in order to draw in air, compress it, and supply it to the fuel cell stack 206 as an air stream 240. The expander 270 is configured to be supplied with an exhaust gas stream 245 from the fuel cell stack 206 in order to convert energy from the exhaust gas stream 245 into electrical energy 65.

[0031] The compressor 210 has a housing body 110 (see Fig. 2 to 4) with a stator chamber 114, a stator 215 arranged in the stator chamber 114, and a rotor 230. The compressor 210 has a bearing 280 for rotatably supporting the rotor 230.

[0032] The rotor 230 has a rotatably mounted rotor shaft 231, and the stator 215 is configured to be supplied with electrical energy 65. This generates an electromagnetic field that leads to the rotation of the rotor 230. The rotor 230 defines an axis A and a circumferential direction U perpendicular to the axis A (see Fig. 2 and Fig. 3).

[0033] The electrical energy 65 supplied to the compressor 210 serves to generate the electric field, to rotate the rotor 230 and thus to compress the air 240. Heat is generated during the compression of the air 240, through the conversion of electrical energy 65 and through friction. To dissipate the heat, the compressor 210 has a cooling arrangement 100. The cooling arrangement 100 has a coolant pump 190 (see also the description of Fig. 2).

[0034] The compressor 210 has two air bearings 280. The air bearings 280 are designed as radial bearings. The air bearings 280 are configured to enable the rotor 230 to rotate around the axis A with as little friction as possible. The compressor 210 has an axial bearing 281 to absorb possible axial forces. The axial bearing 281 is configured to prevent a displacement of the rotor shaft 231 along the axis A. The air bearings 280 and optionally the axial bearing 281 can be cooled by a cooling air flow 145 (see Fig. 4 and the description of the Fig. 2 and Fig. 3) are cooled. In other words: in addition to the two radial bearings used to support the drive shaft, the thrust bearing 281 is required to support the resulting axial forces of the impellers. The losses arising in the thrust bearing 281 are higher than those of the radial bearings. For this reason, the thrust bearing 281 is air-cooled. Losses also arise in the rotor magnet, which is integrated into the shaft. The rotor 230 itself is cooled with this cooling air flow. This cools part of the motor.

[0035] The cooling arrangement 100 is further described with reference to Fig. 2 to 4.

[0036] Fig. 2 shows a perspective view of a cooling assembly 100 according to one aspect of the disclosure. The cooling assembly 100 according to Fig. 2 is a cooling arrangement 100 for a compressor 210 of a fuel cell system 205 for a vehicle 200a, 200b, comprising an air bearing 280. Such a vehicle 200a, 200b and such a compressor 210 are described with reference to Fig. 1. The cooling arrangement 100 according to Fig. 2 is the one with reference to Fig. 1 described cooling arrangement 100. Fig. 2 is made with reference to Fig. 1 described.

[0037] For cooling, the compressor 210 has the cooling arrangement 100. The cooling arrangement 100 has a housing body 110 with a lateral surface 130 for arranging the stator 215 in a stator chamber 114 encompassed by the housing body 110 and delimited by the lateral surface 130 (see also Fig. 3).

[0038] The housing body 110 has a cooling liquid 235 (see schematic Fig. 4) coolable cooling section 125. So that heat can be transferred from the housing body 110 to the cooling liquid 235, the cooling arrangement 100 has a cooling liquid channel 120 within the cooling section 125 through which the cooling liquid 235 can flow. The cooling liquid 235 can be pumped through the cooling liquid channel 120 by the coolant pump 190. In other words, the cooling section 125 extends along the axis A and in the circumferential direction U at least partially through the housing body 110 in order to absorb and dissipate heat transported from the stator 215 via the outer surface 130 to the housing body 110 by the cooling liquid 235. The cooling liquid channel 120 is thus arranged to cool the outer surface 130.

[0039] In a non-limiting example, the coolant pump 190 is configured to pump the coolant 235 through the coolant channel 120 at a volume flow rate of 4 l / min to 10 l / min and to pressurize the coolant channel 120 with the coolant 235 at a pressure of up to 3.5 bar. The cooling arrangement 100, and in particular the coolant channel 120 and the coolant pump 190, are configured to reduce the resulting temperature from up to 200°C to a maximum of 55°C using the coolant 235.

[0040] The cooling arrangement 100 has a housing shell 112 (see Fig. 4), and the housing shell 112 is arranged around the housing body 110 such that the cooling liquid channel 120 is arranged between the housing shell 112 and the housing body 110. The cooling liquid channel 120 is formed in the cooling section 125 partially through the housing body 110 and partially through the housing shell 112. The compressor 210 thus has an at least two-part or two-shell housing that comprises the housing body 110 and the housing shell 112. The housing can also be referred to as a cooling jacket.

[0041] The cooling arrangement 140 has an air guide channel 140 for guiding a cooling air flow 145 (see schematic Fig. 4). The cooling air flow 145 can be transported within the air duct 140. The air duct 140 is arranged within the cooling liquid duct 120. The air duct 140 is thus contacted by the cooling liquid 235, and by thermal conduction, heat from the cooling air flow 145 can be transferred via the air duct 140 to the cooling liquid 235 flowing through the cooling liquid duct 120. The air duct 140 is arranged within the cooling liquid duct 120 in such a way that the cooling liquid 235 can flow around the air duct 140 (see also Fig. 3 and Fig. 4).

[0042] The air guide channel 140 is for guiding the cooling air flow 145 for cooling the air bearing 280 (see Fig. 1). The cooling air flow 145 is guided through a gap between the rotor 230 and the stator 215 to absorb and dissipate heat generated there.

[0043] In Fig. Figure 2 shows an example of the geometry of the housing body 110. The housing body 100 is essentially hollow-cylindrical in shape. The outer surface 130 is a cylindrical outer surface with a longitudinal axis corresponding to the axis A. The outer surface 130 can have the contour of a circular cylinder or a general cylinder. The housing body 100 or the outer surface 130 thus define the axis A and the circumferential direction U perpendicular to the axis A.

[0044] The cooling liquid channel 120 and the air guide channel 140 are each arranged windingly around the outer surface 130 along the axis A and in the circumferential direction U within the housing body 110. The cooling liquid channel 120 and the air guide channel 140 each have a plurality of turns W. Each of the plurality of turns W is arranged completely circumferentially around the outer surface 130, with the exception of the turns W of the air guide channel 140, which protrude from the housing 130 to be fed to the air bearing 280 and optionally to the axial bearing 281. For example, the first and / or last turn W are not necessarily arranged 360° around the outer surface 130, but end in an inlet or outlet. To cool the air bearings 280 and optionally the axial bearing 281, the air guide channel 140 can be led out of the coolant channel 120 and arranged in the direction of the air bearing 280 and optionally the axial bearing 281.This can be achieved, for example, by an opening (not shown) in the housing shell 112.

[0045] The air duct 140 is formed as a tube 141. The air duct 140 or the tube 141 is made of a steel, copper, and / or aluminum alloy and / or a composite material. The tube 141 can have a circular cross-section. The tube 141 is arranged in the coolant channel 120 or between the housing body 110 and the housing shell 112.

[0046] Fig. 3 shows a section through a cooling arrangement 100 according to one aspect of the disclosure. The cooling arrangement 100 according to Fig. 3 is the one with reference to Fig. Cooling arrangement 100 described in Figures 1 to 2. Fig. 3 is made with reference to Fig. 1 to 2.

[0047] Fig. Figure 3 further illustrates the geometry of the housing body 110. The housing body 110 is made in one piece and is manufactured, for example, from a metallic material by casting. This allows for sufficient heat transfer from the stator chamber 130 to the cooling fluid channel 120.

[0048] Fig. 4 shows a detail of a section of a cooling arrangement 100 according to one aspect of the disclosure. The cooling arrangement 100 according to Fig. 4 is the one with reference to Fig. Cooling arrangement 100 described in Figures 1 to 3. Fig. 4 is made with reference to Fig. 1 to 3.

[0049] The housing shell 112 and the housing body 110 are arranged between the windings W, abutting one another without a seal. Ribs (not indexed) of the housing body 110 abut the partially hollow-cylindrical housing shell 112, with one of the windings W of the cooling fluid channel 120 being arranged between each two ribs. The housing shell 112 and the housing body 110 are connected to one another in a joining section 113, for example by welding. This seals the housing and prevents the cooling fluid 235 from escaping from a space formed by the housing shell 112 and the housing body 110, which also contains the cooling fluid channel 120. Remachining of the ribs is unnecessary.

[0050] The cooling fluid channel 120 defines a cooling fluid flow direction 122, and the air guide channel 140 defines an air flow direction 142, each indicated by a cross. In the section shown, the cooling fluid flow direction 122 and the air flow direction 142 are aligned into the plane of the drawing. The cooling fluid is guided through the pre-cast comb profile. The tube 141, through which the air flows and is thereby cooled, is guided in this profile. The tube 141 is not cast into the aluminum housing. The cooling fluid flow direction 122 defines the flow direction of the cooling fluid 235 within the cooling fluid channel 120 and is thus largely determined by the geometry of the cooling fluid channel 120. The air flow direction 142 defines the flow direction of the cooling air flow 145 within the air duct 140 and is thus largely determined by the geometry of the air duct 140.Thus, the cooling liquid flow direction 122 and the air flow direction 142 are also arranged winding around the axis A. The cooling liquid flow direction 122 and the air flow direction 142 are locally aligned parallel to one another; the cooling liquid 235 and the cooling air flow 145 thus move parallel to one another around the housing body 110.

[0051] Likewise, the cooling liquid flow direction 122 and the air flow direction 142 may be oriented opposite to each other (not shown). Reference symbol (part of the description) 65 electrical energy 100 cooling arrangement 110 Housing body 112 Housing shell 113 Joint section 114 Stator chamber 120 Coolant channel 122 Coolant flow direction 125 cooling section 130 lateral surface 140 air duct 141 pipe 142 Air flow direction 145 Cooling air flow 190 coolant pump 200a vehicle 200b commercial vehicle 205 Fuel cell system 206 fuel cell stacks 210 Compressor 215 Stator 230 rotor 231 Rotor shaft 235 Coolant 240 airflow 245 exhaust gas flow 250 electric drive 260 Energy storage device 270 expanders 280 air bearings 281 thrust bearings A axis U circumferential direction W winding QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] DE 10 2023 103 724.2

[0007]

Claims

[1] Cooling arrangement (100) for a compressor (210) comprising an air bearing (280) of a fuel cell system (205) for a vehicle (200a), in particular a commercial vehicle (200b), the cooling arrangement (100) comprising: - a housing body (110) with a lateral surface (130) for arranging a stator (215) in a stator chamber (114) encompassed by the housing body (110) and delimited by the lateral surface (130) and with a cooling section (125) which can be cooled by a cooling liquid (235), - a cooling liquid channel (120) through which the cooling liquid (235) can flow, and - an air guide channel (140) for guiding a cooling air flow (145) for cooling the air bearing (280), wherein - the cooling liquid channel (120) in the cooling section (125) is formed at least partially by the housing body (110) and is arranged to cool the lateral surface (130), and - the air duct (140) is arranged within the cooling liquid duct (120). [2] Cooling arrangement (100) according to claim 1, wherein - the air guide channel (140) is arranged within the cooling liquid channel (120) in such a way that the cooling liquid (235) can flow around the air guide channel (140). [3] Cooling arrangement (100) according to claim 1 or 2, wherein - the cooling liquid channel (120) defines a cooling liquid flow direction (122) and the air guide channel (140) defines an air flow direction (142), and - the cooling liquid flow direction (122) and the air flow direction (142) are aligned parallel and / or opposite to each other. [4] Cooling arrangement (100) according to one of the preceding claims, wherein - the compressor (210) has a rotor (230), the rotor (230) and / or the lateral surface (130) defines an axis (A) and a circumferential direction (U), and - the cooling liquid channel (120) and the air guide channel (140) are each arranged windingly around the outer surface (130) along the axis (A) and in the circumferential direction (U) within the housing body (110). [5] Cooling arrangement (100) according to one of the preceding claims, wherein - the housing body (110) defines a circumferential direction (U), and - the cooling liquid channel (120) and the air guide channel (140) are each arranged completely around the housing body (110). [6] Cooling arrangement (100) according to one of the preceding claims, wherein the air guide channel (140) is designed as a tube (141). [7] Cooling arrangement (100) according to one of the preceding claims, wherein the air duct (140) comprises a steel, copper, and / or aluminum alloy and / or a composite material. [8] Cooling arrangement (100) according to one of the preceding claims, wherein - the cooling arrangement (100) has a housing shell (112), and - the housing shell (112) is arranged around the housing body (110) in such a way that the cooling liquid channel (120) is arranged between the housing shell (112) and the housing body (110). [9] Cooling arrangement (100) according to claim 8, wherein - the cooling liquid channel (120) has a plurality of turns (W), and - the housing shell (112) and the housing body (110) are arranged between the windings (W) in abutting relationship without a seal. [10] Compressor (210) for a fuel cell system (205) of a vehicle (200a), in particular a commercial vehicle (200b), comprising the cooling arrangement (100) according to one of the preceding claims, a stator (215) arranged in the stator space (114) encompassed by the housing body (110), a rotor (230) and an air bearing (280). [11] Fuel cell system (205) for a vehicle (200a), in particular a commercial vehicle (200b), comprising a compressor (210) according to claim 10 and a fuel cell stack (206) which can be supplied with an air flow (240) by the compressor (210). [12] Vehicle (200a), in particular commercial vehicle (200b), comprising a fuel cell system (205) according to claim 11, a compressor (210) according to claim 10 and / or a cooling arrangement (100) according to one of claims 1 to 9.

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