Evaporator device, compression refrigeration cycle system and method

Abstract

The invention is based on an evaporator device for a compression refrigeration cycle system (10), with an evaporator block (12) which has at least one first heat exchanger segment (14) and which has at least one further heat exchanger segment (16), which are connected in series with respect to an external heat reservoir (18), in particular ambient air, and which are connected in series with respect to a refrigerant (20) of the compression refrigeration cycle system (10). It is proposed that at least the first heat exchanger segment (14) and the further heat exchanger segment (16) are formed in one piece, in particular monolithically.

Description

Prior ArtAn evaporator device for a compression refrigeration circuit system, having an evaporator block which has at least one first heat exchanger segment and which has at least one further heat exchanger segment, which are connected in series with respect to an external heat reservoir, in particular ambient air, and which are connected in series with respect to a refrigerant of the compression refrigeration circuit system, has already been proposed.Disclosure of the InventionThe invention is based on an evaporator device for a compression refrigeration circuit system, having an evaporator block which has at least one first heat exchanger segment and which has at least one further heat exchanger segment which are connected in series with respect to an external heat reservoir, in particular ambient air, and which are connected in series with respect to a refrigerant of the compression refrigeration circuit system.It is proposed that at least the first heat exchanger segment and the further heat exchanger segment are formed in one piece, in particular monolithically.The configuration of the evaporator device according to the invention advantageously makes it possible to provide a construction with low costs, since in particular the first heat exchanger segment and the at least one further heat exchanger segment are formed in one piece. Advantageously, a low assembly complexity can be provided, since in particular the first heat exchanger segment and the at least one further heat exchanger segment are formed in one piece and therefore do not have to be assembled.The compression refrigeration circuit system comprises in particular at least one compressor for compressing the refrigerant, at least one condenser for liquefying the refrigerant and at least one expansion valve for releasing the refrigerant. The compression refrigeration circuit system has in particular at least one configuration or an operating mode in which / m the compression refrigeration circuit system can be operated as a heat pump, and / or a configuration or an operating mode in which / m the compression refrigeration circuit system can be operated as a refrigerating machine. The compression refrigeration circuit system can be designed in particular specifically for heating, cooling and / or dehumidifying. The compression refrigeration circuit system preferably has at least one open-loop and / or closed-loop control unit which is configured to open-loop or closed-loop control a refrigerant pressure and / or a refrigerant temperature and / or refrigerant flow speed and / or a further variable which appears expedient to the person skilled in the art. The evaporator device is configured in particular for evaporating the refrigerant while absorbing heat from the external heat reservoir. The refrigerant can be formed, for example, as water, as ammonia, as halogenated or non-halogenated hydrocarbon, as carbon dioxide or as another refrigerant that appears expedient to the skilled person. Depending on the application, the external heat reservoir can be, for example, ambient air, a coolant or another gas available at a location of use of the evaporator device. "Established" is to be understood in particular as being specially programmed, specially configured, specially designed and / or specially equipped. The fact that an object is set up for a specific function is to be understood in particular to mean that the object fulfills and / or executes this specific function in at least one application state and / or operating state. An "open-loop and / or closed-loop control unit" is to be understood in particular as a unit having at least one control electronics. A "control electronics" is to be understood in particular as a unit having a processor unit and having a memory unit and having an operating program stored in the memory unit.The evaporator block is preferably designed as a monoblock, in particular a monolithic component. In particular, the evaporator block is formed in one piece, preferably monolithically, in particular formed in one piece, for example from a casting. Preferably, the evaporator block forms at least the first heat exchanger segment and the at least one further heat exchanger segment. For example, the evaporator block has at least two further heat exchanger segments which are connected in series with respect to the refrigerant and / or the heat reservoir. The first heat exchanger segment and the at least one further heat exchanger segment in particular each comprise at least one heat exchanger for a heat transfer between the heat reservoir and the refrigerant. The heat exchangers are preferably constructed according to the cross-flow principle or the countercurrent principle. The heat exchangers preferably comprise a plurality of refrigerant lines running in parallel fluidic terms and / or a plurality of heat reservoir lines running in parallel fluidic terms. The heat exchangers of the first heat exchanger segment and of the at least one further heat exchanger segment can be of identical construction or have different construction types. For example, at least one of the heat exchangers of the first heat exchanger segment and / or of the at least one further heat exchanger segment is designed as a tube heat exchanger, as a microchannel heat exchanger, as a plate heat exchanger, as a cooling register or has a different type of construction which appears expedient to the person skilled in the art. Preferably, the refrigerant lines of the first heat exchanger segment and the refrigerant lines of the at least one further heat exchanger segment are arranged at least substantially parallel to one another. Alternatively, the refrigerant lines of the first heat exchanger segment and of the at least one further heat exchanger segment could also be arranged in a V-shaped or L-shaped or U-shaped manner or in a comparable arrangement that appears expedient to the person skilled in the art. A "monoblock" is to be understood here in particular as a component which is produced from a casting or from a blank. By "one piece" is to be understood, in particular, as being connected at least in a materially integral manner, for example by a welding process, an adhesive bonding process, an injection molding process and / or another process that appears expedient to the person skilled in the art, and / or advantageously formed in one piece, such as, for example, by production from a casting and / or by production in a single- or multicomponent injection molding process and advantageously from a single blank. "At least substantially" is to be understood in this context in particular as meaning that a deviation from a predefined value deviates in particular by less than 25%, preferably by less than 10% and particularly preferably by less than 5% of the predefined value.The evaporator device preferably has at least one temperature sensor which detects the refrigerant temperature at a refrigerant inlet and / or a refrigerant outlet of the first heat exchanger segment and / or of the at least one further heat exchanger segment. Alternatively or additionally, it is conceivable for the evaporator device to have at least one further temperature sensor which is configured to detect a temperature of the external heat reservoir before and / or after the first heat exchanger segment and / or before and / or after the at least one further heat exchanger segment. For example, the temperature sensor is designed as a resistance thermometer, semiconductor temperature sensor, thermocouple or the like. Alternatively, the evaporator device comprises a plurality of temperature sensors which are arranged distributed in particular over the heat reservoir-side surface of the first heat exchanger segment and / or of the at least one further heat exchanger segment. It is conceivable for the temperature sensor to be designed as a pyrometer, as an infrared camera or the like, wherein a punctiform or spatially resolved measurement range of the temperature sensor is aligned in particular on the heat reservoir-side surface of the first heat exchanger segment and / or of the at least one further heat exchanger segment. The evaporator device preferably has at least one refrigerant distributor unit. The first heat exchanger segment preferably has a refrigerant distributor unit. The first further heat exchanger segment preferably has at least one further refrigerant distributor unit. The evaporator device preferably has at least one refrigerant collector unit. The first heat exchanger segment preferably has a refrigerant collector unit. The first further heat exchanger segment preferably has at least one further refrigerant collector unit. A "refrigerant distributor unit" is to be understood here in particular as a refrigerant line adapter which is connected fluidically to the refrigerant lines and is configured to divide a refrigerant line between a plurality of refrigerant lines. A "refrigerant collector unit" is to be understood here in particular as a further refrigerant line adapter which is connected fluidically to the refrigerant lines and is configured to combine a plurality of refrigerant lines in a refrigerant line.It is furthermore proposed that the first heat exchanger segment and the at least one further heat exchanger segment are at least substantially thermally decoupled from one another. Advantageously, a particularly high level of operating reliability and a high level of efficiency can be provided, since in particular icing of the first heat exchanger segment and of the at least one further heat exchanger segment can be prevented. Preferably, the first heat exchanger segment in at least one operating state has a different temperature from the at least one further heat exchanger segment. Preferably, the refrigerant temperature in the first heat exchanger segment is greater in the at least one operating state than in the at least one further heat exchanger segment. Preferably, the surface temperature of the first heat exchanger segment has a value of more than 0° C. in the at least one operating state. Preferably, the surface temperature of the at least one further heat exchanger segment has a value of less than 0° C. in at least one operating state. Preferably, a slight, in particular negligible, heat transfer by heat conduction takes place between the first heat exchanger segment and the at least one further heat exchanger segment. Preferably, the surface temperature of the first heat exchanger segment of more than 0° C. is configured to de-wet the external heat reservoir, in particular ambient air, and / or to prevent ice formation in the at least one heat exchanger segment downstream in the flow direction. By "thermally decoupled" is to be understood in particular that at least one heat conduction between two components is at least substantially interrupted or at least reduced, as a result of which the two components can have different temperature levels.Moreover, it is proposed that at least one insulation element is arranged between the first heat exchanger segment and the at least one further heat exchanger segment. Advantageously, a particularly high level of operating reliability and a high level of efficiency can be provided, since in particular icing of the first heat exchanger segment and of the at least one further heat exchanger segment can be prevented. The insulation element is preferably configured to enable a temperature difference between the first heat exchanger segment and the at least one further heat exchanger segment. The insulation element is preferably configured to reduce a heat transfer, in particular heat conduction, between the first heat exchanger segment and the at least one further heat exchanger segment. The insulation element could have, for example, a lower thermal conductivity than the first heat exchanger segment and the at least one further heat exchanger segment. Preferably, the insulation element is integrally connected to the evaporator block and / or formed by the evaporator block. In particular, the insulation element contacts the first heat-conducting element and / or the further heat-conducting element.Furthermore, it is proposed that the insulation element has at least one gap. Advantageously, a particularly high level of operating reliability and a high level of efficiency can be provided, since in particular icing of the first heat exchanger segment and of the at least one further heat exchanger segment can be prevented. Advantageously, a construction can be provided with particularly low costs, since the gap can be produced in a favorable manner. The gap is preferably formed as a recess. The at least one gap is preferably configured to at least substantially prevent solid-state contact between the first heat exchanger segment and the at least one further heat exchanger segment. The insulation element preferably has a plurality of gaps which are arranged next to one another. Preferably, the at least one gap is formed by the first heat exchanger segment and the at least one further heat exchanger segment. Preferably, the first heat exchanger segment and the at least one further heat exchanger segment are arranged at a distance from one another. Preferably, the first heat exchanger segment and the at least one further heat exchanger segment are connected to one another at at least one connection point, in particular in one piece. Preferably, the at least one gap is interrupted at at least one connection point at which the first heat exchanger segment and the at least one further heat exchanger segment are connected to one another. The gaps preferably have a constant gap height. Preferably, a main plug-in plane of the at least one gap is arranged at least substantially perpendicular to the flow direction of the external heat reservoir, in particular ambient air. Preferably, the external heat reservoir, in particular ambient air, is arranged in the at least one gap. A "gap" is to be understood here in particular as a recess which has a greater gap width and / or gap length than gap height. In particular, the gap height is arranged at least substantially parallel to the flow direction of the external heat reservoir, in particular ambient air.It is furthermore proposed that the first heat exchanger segment and the at least one further heat exchanger segment have a solid-body contact surface, in particular a connecting surface, which amounts, in particular, to less than 25%, preferably less than 10%, of a flow cross-sectional area. Advantageously, a particularly high level of operating reliability and a high level of efficiency can be provided, since in particular icing of the first heat exchanger segment and of the at least one further heat exchanger segment can be particularly well prevented, since a particularly low level of heat conduction is achieved between the first heat exchanger segment and the at least one further heat exchanger segment. Preferably, the solid contact surface is greater than 1% of the flow cross-sectional area. The flow cross-sectional surface is preferably arranged parallel to the solid-body contact surface, in particular the connecting surface. Preferably, the solid contact surface and the flow cross-sectional surface lie in a sectional plane. A "flow cross-sectional area" is to be understood here in particular as an area which is arranged at least substantially perpendicular to a flow direction of the external heat reservoir, in particular ambient air, and between the first heat exchanger segment and the at least one further heat exchanger segment. A "solid-body contact surface" is to be understood here in particular as a cut surface which is arranged in the solid-body contact, in particular connection point, of the first heat exchanger segment with the at least one further heat exchanger segment and is arranged perpendicular to the flow direction of the external heat reservoir, in particular ambient air.In addition, at least one pressure regulating element for regulating a pressure of the refrigerant is proposed, wherein the pressure regulating element is arranged fluidically between the first heat exchanger segment and the further heat exchanger segment. Advantageously, a high degree of efficiency can be provided, since in particular a temperature at the first heat exchanger segment above 0° C. can be set via the pressure regulating element and ice formation is thereby prevented. The pressure regulating element is configured in particular to cause different pressure levels of the refrigerant during operation of the evaporator device in the first heat exchanger segment and in the at least one further heat exchanger segment, and in particular thereby different temperature levels. In particular, the pressure regulating element causes an additional pressure difference between the first heat exchanger segment and in the at least one further heat exchanger segment, which goes beyond a pressure difference due to flow resistances between the first heat exchanger segment and in the at least one further heat exchanger segment. The pressure regulating element is arranged in particular fluidically between the first heat exchanger segment and the further heat exchanger segment. The pressure regulating element is arranged in particular between the refrigerant collector unit and the refrigerant distributor unit. It is conceivable that the pressure regulating element is designed as an adjusting valve, which is configured in particular for adapting the pressure difference in the refrigerant between the first heat exchanger segment and the further heat exchanger segment during operation of the evaporator device.It is furthermore proposed that the pressure regulating element is designed as a rigid, in particular non-adjustable, narrowing of a flow cross section. Advantageously, a construction can be provided with low costs, since in particular the rigid narrowing of the flow cross section can be produced particularly simply and cost-effectively. The pressure regulating element is preferably designed as a U-tube with a taper, for example a throttle element. Preferably, the tapering of the flow cross section is formed at least as the smallest cross-sectional area in the pressure regulating element perpendicular to the flow direction. Preferably, the smallest cross-sectional area along a flow direction of the refrigerant is located at the center of a transition region of the U-tube. The taper is preferably formed as a reduction in the cross section in the transition region of the U-tube. Preferably, the cross-sectional area in the transition region tapers from both sides of the transition region to the smallest cross-section. Alternatively, the cross-sectional area could only taper from one side to the smallest cross-sectional area. Preferably, the transition region, in particular before and / or after the minimum cross-sectional area in the flow direction, is configured to keep flow losses low. Alternatively, the tapering could also be formed abruptly, for example by inserting a throttle disk. A "tapering" is to be understood here in particular as a reduction in a cross section, preferably a flow cross section.Moreover, it is proposed that the pressure regulating element has at least one bypass valve which is configured to bridge the narrowing of the flow cross section in a reverse operation. Advantageously, a high power can be provided, since in particular no pressure reduction occurs in the refrigerant by the bypass valve and the refrigerant thereby has a higher temperature. The bypass valve is preferably designed as a check valve. The bypass valve is preferably connected to a bypass, in particular a refrigerant bypass, which bypasses the pressure regulating element, in particular in order to operate the first heat exchanger segment and the at least one further heat exchanger segment at least substantially the same pressure level in at least one operating mode of the evaporator device. The first heat exchanger segment and the at least one further heat exchanger segment can be operated in particular "substantially at the same pressure level" if a flow resistance of a refrigerant connecting line which connects the first heat exchanger segment and the at least one further heat exchanger segment is less than twice a flow resistance of the heat exchanger segments, in particular less than or equal to the flow resistance of the heat exchanger segments, preferably less than half the flow resistance of the heat exchanger segments. Preferably, a ratio of the pressure level of the heat exchanger segments relative to the pressure level of the further heat exchanger segments at an at least substantially identical pressure level is at least less than 2, in particular less than 1.25, preferably less than 1.1, particularly preferably less than 1.05. Preferably, a ratio of the pressure level of the heat exchanger segment relative to the pressure level of the further heat exchanger segment is at least greater than 1, in particular greater than 1.5, preferably greater than 2, optionally greater than 3, during operation of the heat exchanger segments at different pressure levels.In addition, a compression refrigeration circuit system with at least one evaporator device is proposed. Advantageously, a construction with low costs can be provided, since in particular the first heat exchanger segment and the at least one further heat exchanger segment are formed in one piece. Advantageously, a low assembly complexity can be provided, since in particular the first heat exchanger segment and the at least one further heat exchanger segment are formed in one piece and therefore do not have to be assembled. The compression refrigeration circuit system comprises in particular the at least one compressor for compressing the refrigerant. The compression refrigeration circuit system preferably comprises the at least one condenser for liquefying the refrigerant. The expansion valve is provided in particular for releasing the refrigerant. The compression refrigeration cycle system includes the expansion valve in particular in addition to the pressure regulating member. The pressure regulating element is preferably arranged downstream of the expansion valve.In addition, it is proposed that the insulation element be stamped. Advantageously, a construction can be provided at low costs, since in particular the insulation element can be manufactured particularly cost-effectively. The evaporator block is preferably produced in at least one method step. The evaporator block is cast in one piece or manufactured from a blank, in particular by machining. Preferably, in a further method step, the insulation element designed as a gap is punched out. Alternatively, the insulation element could also be introduced into the evaporator block in a comparable material-removing method, such as, for example, laser cutting methods or milling methods or the like.The evaporator device according to the invention, the compression refrigeration circuit system according to the invention and the method according to the invention should not be limited to the application and embodiment described above. In particular, the evaporator device according to the invention, the compression refrigeration circuit system according to the invention and the method according to the invention for fulfilling a mode of operation described herein can have a number which differs from a number of individual elements, components and units and method steps mentioned herein. In addition, in the value ranges specified in this disclosure, values lying within the stated limits should also be considered as disclosed and usable as desired.DRAWINGFurther advantages are evident from the following description of the drawings. The drawing shows an embodiment of the invention. The drawings, specification and claims contain numerous features in combination. The skilled person will expediently also consider the features individually and summarize them to form meaningful further combinations.The following are shown: FIG. 1 shows a compression refrigeration circuit system with an evaporator device, FIG. 2 shows an evaporator block of the evaporator device with an insulation element, FIG. 3 shows a schematic illustration of a pressure regulating element of the evaporator device, and FIG. 4 shows a schematic flow diagram of a method for manufacturing the evaporator device.DESCRIPTION OF THE EMBODIMENTFIG. 1 shows a compression refrigeration cycle system 10. the compression refrigeration cycle system 10 includes a compressor 36 for compressing a refrigerant 20 of the compression refrigeration cycle system 10. the compression refrigeration cycle system 10 includes a condenser 38 for liquefying the refrigerant 20. the compression refrigeration cycle system 10 includes an expansion valve 40. the expansion valve 40 is configured to expand the refrigerant 20. The compression refrigeration cycle system 10 includes an evaporator device. The evaporator device is configured to evaporate the refrigerant 20 by receiving heat from an external heat reservoir 18. The external heat reservoir 18 is designed as ambient air.The evaporator device has an evaporator block 12. The evaporator block 12 is formed integrally. The evaporator block 12 is monolithically formed. The evaporator block 12 is made from a casting or from a blank. The evaporator block 12 has a first heat exchanger segment 14. The evaporator block 12 has a further heat exchanger segment 16. The first heat exchanger segment 14 and the further heat exchanger segment 16 are formed in one piece. The first heat exchanger segment 14 and the further heat exchanger segment 16 are monolithically formed. It is conceivable for the evaporator block 12 to have a plurality of further heat exchanger segments. The evaporator block 12 forms the heat exchanger segments 14, 16. The first heat exchanger segment 14 is arranged downstream of the expansion valve 40 with respect to the refrigerant 20. The further heat exchanger segment 16 is arranged downstream of the first heat exchanger segment 14 with respect to the refrigerant 20. An insulation element 22 is arranged between the first heat exchanger segment 14 and the further heat exchanger segment 16. The evaporator block 12 forms the insulation element 22. The insulation element 22 and the heat exchanger segments 14, 16 are formed in one piece. The first heat exchanger segment 14 and the further heat transfer segment 16 are thermally decoupled from one another.The first heat exchanger segment 14 has a heat exchanger 42 for a heat transfer from the external heat reservoir 18 to the refrigerant 20. The heat exchanger 42 of the first heat exchanger segment 14 is shown here by way of example as a cooling register. The heat exchanger 42 of the first heat exchanger segment 14 comprises a plurality of refrigerant lines 46 running in parallel fluidic terms, cf. FIG. 2 : The heat exchanger 42 of the first heat exchanger segment 14 has a plurality of plates, ribs, fins or other surface-enlarging elements which are arranged on the refrigerant lines 46 of the first heat exchanger segment 14. The surface-enlarging elements of the first heat exchanger segment 14 are configured for direct contact with the external heat reservoir 18. The evaporator device has a further heat exchanger segment 16. The further heat exchanger segment 16 has at least one further heat exchanger 44 for a heat transfer from the external heat reservoir 18 to the refrigerant 20. The further heat exchanger segment 16 could have any number of further heat exchangers 44 arranged in series. The further heat exchanger segment 16 is shown here with two further heat exchangers 44, 44', which are each arranged fluidically in series with respect to the refrigerant 20 and the external heat reservoir 18. The further heat exchangers 44, 44' of the further heat exchanger segment 16 are each designed identically to the heat exchanger 42 of the first heat exchanger segment 14.The evaporator device comprises a fan, not shown here, for actively conveying the external heat reservoir 18 through the evaporator device. The evaporator device preferably comprises a collecting trough 48 for collecting and discharging a condensate forming on the first heat exchanger segment 14. The first heat exchanger segment 14 and / or the further heat exchanger segment 16 are arranged relative to one another in such a way that the condensate forming on the first heat exchanger segment 14 cannot flow, creep or drip off toward the second heat exchanger segment 16, for example by means of an at least sectional line guide against the force of gravity and / or a liquid-tight partition wall between the heat exchanger segments 14, 16. The collecting trough 48 can be restricted to the first heat exchanger segment 14 or additionally form a collecting region for the further / n heat exchanger segment / s 16.The evaporator device has a temperature sensor 50. The temperature sensor 50 is arranged on a surface of a coolant outlet of the first heat exchanger segment 14. Alternatively, the temperature sensor 50 could also be arranged in the refrigerant 20. The temperature sensor 50 is configured to detect a temperature of the first heat exchanger segment 14. The evaporator device has a further temperature sensor 52. The further temperature sensor 52 is arranged on a surface of a coolant outlet of the further heat exchanger segment 16. Alternatively, the further temperature sensor 52 could also be arranged in the refrigerant 20. The further temperature sensor 52 is configured to detect a temperature of the refrigerant 20 after passing through the further heat exchanger segment 16. The evaporator device has a control or regulating unit, not shown here. The open-loop or closed-loop control unit is configured for processing and / or evaluating measured values of the temperature sensors 50, 52. The open-loop and / or closed-loop control unit is configured to control a surface temperature of the first heat exchanger segment 14 to a value of greater than 0° C. as a function of the measured values of the temperature sensor 50, in order to prevent ice formation on the surface.The heat exchanger segments 14, 16 are connected in series with respect to the refrigerant 20 of the compression refrigeration circuit system 10. The evaporator device has a refrigerant header unit 70, 70'. The refrigerant collector unit 70, 70' is formed as an adapter. The refrigerant collector unit 70, 70' is configured to merge the refrigerant lines 46 of the heat exchanger segment 14, 16 into a refrigerant line. The evaporator device has a refrigerant distribution unit 68, 68'. The refrigerant distributor unit 68, 68' is designed as an adapter. The refrigerant distributor unit 68, 68' is configured to divide the refrigerant line into the refrigerant lines 46 of the heat exchanger segment 14, 16. The refrigerant distributor unit 68, 68' is arranged upstream of the heat exchanger segment 14, 16 with respect to the refrigerant 20. The refrigerant collector unit 70 is arranged downstream of the heat exchanger segment 14, 16 with respect to the refrigerant 20.The evaporator device includes at least one pressure regulating member 30 for regulating a pressure of the refrigerant 20. The pressure regulating member 30 is disposed downstream of the expansion valve 40 and upstream of the compressor 36. The pressure regulating element 30 is arranged fluidically between the first heat exchanger segment 14 and the further heat exchanger segment 16. The pressure regulating element 30 is fluidically connected to the refrigerant collector unit 70 of the first heat exchanger segment 14. The pressure regulating element 22 is fluidically connected to the refrigerant distributor unit 68' of the further heat exchanger segment 16. The pressure regulating element 22 is configured to increase a flow resistance between the first heat exchanger segment 14 and the further heat exchanger segment 16 and thereby to enable different pressure levels within the first heat exchanger segment 14 and the further heat exchanger segment 16.FIG. 2 shows a schematic sectional illustration through the evaporator block 12. The insulation element 22 is configured to reduce heat conduction compared to an embodiment without an insulation element 22. The insulation element 22 is configured to enable a temperature gradient between the first heat exchanger segment 14 and the further heat exchanger segment 16. The insulation element 22 has a plurality of gaps 24. The gaps 24 are arranged next to one another. The gaps 24 have a gap width 62. The gap width 62 is arranged perpendicular to a flow direction 64 of the external heat reservoir 18. The gaps 24 are arranged next to one another along the gap width 62. The gaps 24 have the same gap width 62. The gaps 24 are arranged in a common sectional plane 66. The gaps 24 have the same gap height 60. The gap height 60 is arranged parallel to the flow direction 64 of the external heat reservoir 18. Each of the gaps 24 extends across two refrigerant lines 46. Alternatively, each of the gaps 24 could extend across only one refrigerant line 46 or across more than two refrigerant lines 46. Alternatively, the insulation element 22 could also be formed as a single gap 24, which extends over all refrigerant lines 46.The first heat exchanger segment 14 and the at least one further heat exchanger segment 16 have a solid-body contact surface 26. The solid contact surface 26 lies in the sectional plane 66. the flow cross-sectional surface 28 lies in the sectional plane 66. the solid contact surface 26 is less than 25% of a flow cross-sectional surface 28. The solid contact surface 26 is more than 1% of the flow cross-sectional area 28.FIG. 3 shows the pressure regulating element 30. the pressure regulating element 30 is formed as a U-tube with a tapering of a flow cross section 32. The tapering is formed as a rigid non-adjustable tapering of the flow cross section 32. The pressure regulating element 30 has a transition region 72 in and counter to a flow direction of the refrigerant 20, in which the flow cross section 32 in and / or counter to the flow direction of the refrigerant 20 tapers to a minimum flow cross section 76. The pressure regulating element 30 could be formed as a Venturi tube with a transition region of the flow cross section 32. Alternatively, the pressure regulating element 30 could also be designed as an adjusting valve with an adjustable flow cross section 32. The pressure regulating element 30 has a bypass valve 34. The bypass valve 34 is arranged in a bypass 74 of the transition region 72 with the tapering of the flow cross section 32. The bypass 74 could be formed as a tube or hose or shaft or the like. The bypass 74 is configured to fluidically bypass the transition region 72 with the tapering of the flow cross section 32. The bypass valve 34 is configured to bridge the tapering of the flow cross section 32 in a reverse operation. In the reverse operation, the refrigerant 20 flows through both the bypass 74 and the taper in the transition region 72. the bypass 74 is configured to prevent flow resistance by the taper in the reverse operation.FIG. 4 shows a schematic flow diagram of a method for manufacturing the evaporator device.In at least one method step 54, the evaporator block 12 is manufactured. The evaporator block 12 is made as one piece. The evaporator block 12 is produced in a primary molding process. The evaporator block 12 is manufactured in a casting process. Alternatively, the evaporator block 12 could also be produced from a blank by a material-removing method. For example, a contour of the evaporator block 12 could be milled from the blank. It is also conceivable for the evaporator block 12 to be produced as a cast component which is additionally post-processed with the material-removing production method.In at least one further method step 56, the insulation element 22 is produced. The insulation element 22 is stamped. Alternatively, the insulation element 22 could also be introduced in a comparable material-removing production method that appears expedient to the person skilled in the art. Alternatively, it is conceivable that the insulation element 22 designed as a gap 24 is already rough-shaped or removed in the method step 54 in the casting process or the material-removing process.In at least one further method step 58, the evaporator block 12 produced in the method steps 54, 56 is mounted to the evaporator device. For this purpose, the pressure regulating element 30 is mounted between the first heat exchanger segment 14 and the further heat exchanger segment 16. Furthermore, the refrigerant collector unit 70 and the refrigerant distributor unit 68 are mounted between the first heat exchanger segment 14 and the further heat exchanger segment 16. The pressure regulating member 30 is fluidly connected to the refrigerant header unit 70. The pressure regulating member 30 is fluidly connected to the refrigerant distribution unit 68. Furthermore, the refrigerant collector unit 70 is mounted to the first heat exchanger segment 14 by the refrigerant collector unit 70 being fluidically connected to the first heat exchanger segment 14. Furthermore, the refrigerant distributor unit 68 is mounted on the further heat exchanger segment 16 by the refrigerant collector unit 70 being fluidically connected to the further heat exchanger segment 16.

Claims

Evaporator device for a compression refrigeration circuit system (10), having an evaporator block (12) which has at least one first heat exchanger segment (14) and which has at least one further heat exchanger segment (16) which are connected in series with respect to an external heat reservoir (18), in particular ambient air, and which are connected in series with respect to a refrigerant (20) of the compression refrigeration circuit system (10), characterized in that at least the first heat exchanger segment (14) and the further heat exchanger segment (16) are formed integrally, in particular monolithically.Evaporator device according to claim 1, characterised in that the first heat exchanger segment (14) and the at least one further heat exchanger segment (16) are at least substantially thermally decoupled from one another.Evaporator device according to claim 1 or 2, characterised in that at least one insulation element (22) is arranged between the first heat exchanger segment (14) and the at least one further heat exchanger segment (16).Evaporator device according to claim 3, characterised in that the insulation element (22) has at least one gap (24).Evaporator device according to one of the preceding claims, characterized in that the first heat exchanger segment (14) and the at least one further heat exchanger segment (16) have a solid-body contact surface (26) which, in particular, amounts to less than 25%, preferably less than 10%, of a flow cross-sectional area (28).Evaporator device according to one of the preceding claims, characterized byat least one pressure regulating element (30) for regulating a pressure of the refrigerant (20), wherein the pressure regulating element (30) is arranged fluidically between the first heat exchanger segment (14) and the further heat exchanger segment (16).Evaporator device according to one of the preceding claims, characterized in that the pressure regulating element (30) is designed as a rigid, in particular non-adjustable, narrowing of a flow cross section (32).Evaporator device according to claim 7, characterised in that the pressure regulating element (30) has at least one bypass valve (34) which is configured to bridge the narrowing of the flow cross section (32) in a reverse operation.Compression refrigeration circuit system (10) having at least one evaporator device according to one of the preceding claims.Method for manufacturing the evaporator device according to one of Claims 1 to 8, characterized in that the insulation element (22) is stamped.

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