Liquid separator

Abstract

The invention relates to a liquid separator (10) for separating liquid from a gas / liquid mixture, the liquid separator comprising an inlet (12), an outlet (14), a flow path (16) connecting the inlet (12) to the outlet (14), and a separation device (22) arranged in the flow path (16), the liquid separator being designed and implemented with simple structural components and a compact structure in the following manner, namely the separation device (22) having a fabric part (40) for liquid separation, through which the flow path (16) passes, so as to enable reliable separation of the liquid, the fabric part (40) being arranged at an angle of 1° to 15° relative to a main flow direction (42) in the separation device (22).

Description

Technical Field

[0001] The invention relates to a liquid separator for separating a liquid from a gas / liquid mixture, having the features of the preamble of claim 1 . Background Art

[0002] Liquid separators are known from the prior art, for example DE 10 2014 013 372 A1, which shows a centrifugal water separator for a fuel cell system.

[0003] Liquid separators can work based on various functional principles, for example by condensation, centrifugal force (cyclones), adsorption (using adsorbents) or baffle surfaces.

[0004] For example, liquid separators can be used in fuel cells, where water is separated from oxygen (O2) by a liquid separator on the cathode side and from hydrogen (H2) by (another) liquid separator on the anode side to increase efficiency. Liquid separators are also used in compressed air systems or air conditioning systems.

[0005] However, depending on the design, conventional liquid separators require considerable space and / or exhibit very high flow resistance, which is problematic. Liquid separators generally only work under certain ambient conditions, such as at room temperature, which is also disadvantageous. Summary of the invention

[0006] The present invention aims to facilitate reliable separation of liquids in a liquid separator via simple structural means and with a compact design. It is desirable that the liquid separator can operate reliably and independently of environmental conditions.

[0007] The invention achieves this object by a liquid separator having the features of claim 1 .

[0008] Liquid separators are used to separate liquids from (flowing), in particular vaporous or atomized, gas / liquid mixtures (gas streams containing liquids).

[0009] Gas / liquid mixtures are in particular mixtures in which a gas is used as carrier medium and the liquid is present in the form of finely distributed droplets.

[0010] The liquid separator comprises an inlet (gas / liquid mixture inlet), an outlet (gas outlet) and a flow path (flow connection) connecting the inlet and the outlet. The flow path comprises at least one separation device in which the actual separation of the liquid from the gas / liquid mixture takes place. The separated liquid can be a pure liquid or a liquid mixture (a mixture of two or more different liquids).

[0011] The liquid separator is characterized in that the separation device comprises a fabric section for liquid separation, through which the flow path passes, wherein the fabric section is arranged at an angle of 1° to 15°, preferably from 1.5° to 10°, ideally from 2° to 4° to a main flow direction in the separation device. The main flow direction is oriented in particular in a central longitudinal direction of the separation device or parallel to the central longitudinal direction of the separation device.

[0012] The separation device proposed herein can be used to separate a liquid (e.g. water) from a gas / liquid mixture at the fabric portion, i.e. the liquid remains on the fabric portion. However, a gas (e.g. air or hydrogen) can pass through the fabric portion and be directed to an outlet (gas outlet). In other words, the liquid can be separated from the gas stream when in contact with the fabric portion. A high level of separation can be achieved using a relatively compact design.

[0013] With the separation device proposed here, a "fabric separator" is provided, which is used as a baffle separator for separating a liquid (e.g. water) from a gas stream (e.g. air or hydrogen). The flow of the gas / liquid mixture to the fabric can take place at a specific angle and at a specific minimum velocity. For example, the flow of the gas / liquid mixture in the process can be used, or the gas / liquid mixture can be brought to a specific flow velocity, for example via a turbine or a pump, before the gas / liquid mixture is guided to the liquid separator. It is also possible to bring the gas / liquid mixture to a specific flow velocity by reducing the flow cross section before the gas / liquid mixture is guided to the liquid separator.

[0014] In a preferred configuration, the separation device can include a second fabric part for liquid separation, through which the flow path passes, wherein the second fabric part is positioned opposite the first fabric part and forms an angle of 1° to 30°, preferably 2° to 20°, ideally 4° to 8° with the first fabric part. With a compact structure, a relatively large separation surface is provided. This can keep the pressure loss relatively small.

[0015] It is advantageous if the first fabric portion and the second fabric portion are arranged symmetrically with respect to a main flow direction in the separation device (located in or parallel to the central longitudinal direction of the separation device). This symmetry is advantageous for the flow conditions, since the flow path at the separation device can be divided into two sub-paths, which then lead to the outlet (gas outlet). The symmetrical arrangement can create two sub-paths of equal strength.

[0016] The separating device may comprise a U-shaped or V-shaped cross section in the fabric portion (fabric holding part of the separating device), which cross section is closed at the front, for example by means of a front partition (the U or V is closed "backwards" and "forwards" via the front partition). The separating device may also comprise the shape of a cone, a truncated cone, a pyramid or a truncated pyramid in the fabric portion (fabric holding part).

[0017] In a preferred variant, the fabric section(s) can be made of a metal fabric, preferably provided with a heating device, via which the fabric section(s) can be heated. By using a metal fabric, a relatively robust variant of the device can be achieved. The heating device contributes to the versatility of the liquid separator, since it can be used at freezing temperatures (temperatures below freezing). This prevents the liquid separated in the fabric section from freezing.

[0018] The heating device can be electrically powered, in particular as a direct heating device. For example, for a structurally simple variant, it can be designed as a resistance heater. For example, the fabric part can include an electrical connection via which power is supplied.

[0019] The fabric parts can be made of metal fabric and can also be heated. One heating device can be provided for both fabric parts (constructionally simple and cost-effective), or one heating device can be provided for each fabric part (more reliable due to independent operation).

[0020] Alternatively, the fabric part(s) can each be made of a plastic fabric. This makes the variant structurally simple and cost-effective. As a result, the overall weight of the device is also lighter.

[0021] In a preferred variant, the fabric portion(s) may comprise a hydrophilic coating.The hydrophilic coating facilitates the level of separation of liquid from the gas / liquid mixture (ie the amount of liquid separated).

[0022] The (multiple) fabric parts may comprise fabric threads or wires comprising two threads or wire systems oriented perpendicularly or parallel to each other (thus forming the fabric part). The fabric threads or wires (first threads or wire systems) oriented perpendicularly to the main flow direction in the separation device (central longitudinal flow direction of the separation device) from the (multiple) fabric parts may comprise a greater thickness than the fabric threads (second threads or wire systems) oriented longitudinally relative to the main flow direction (vector proportionally). Due to the thicker fabric threads or wires, the net cross-section of the fabric part, i.e. the open cross-section (not filled with fabric threads) along the main flow direction (central longitudinal direction) can be reduced. This improves the level of separation.

[0023] In an advantageous variant, the separating device can comprise a housing, on which and / or in which the components of the separating device are arranged and / or fastened, wherein the housing can optionally be made of plastic or metal. With the housing, the components of the separating device can be fixed relative to one another and the separating device can be handled as a unit or assembly. A plastic housing can be produced more easily and / or have a lighter weight. A metal housing can be used for a more robust variant.

[0024] In a preferred variant, a heating device can be provided, via which the housing can be heated. In particular, a heating device can be provided for a metal housing and facilitates the use of the liquid separator at freezing temperatures. As mentioned above, the heating device can be implemented as an electric device, for example as a direct heating device.

[0025] The housing of the separation device may comprise a fabric holding portion, on which the fabric portion is arranged and / or fastened or in which the fabric holding portion is arranged. Furthermore, the housing may comprise a connecting portion attached to the fabric holding portion (upstream, i.e. towards the inlet). For example, the connecting portion may comprise an annular cross-section that is enlarged relative to the fabric holding portion. Furthermore, the housing may comprise a diverter gill connected to the fabric holding portion, in particular on the side facing away from the connecting portion (downstream).

[0026] As mentioned above, the housing (downstream of the fabric portion) of the separation device can include a diverter gill or a diverter tube. This facilitates the transfer of water, since the liquid separated at the separation device, for example in the form of droplets, can be directed to the liquid diverter or liquid reservoir. For example, the diverter gill or the diverter tube can lead to a wall separating the separation device from the liquid reservoir or open to it. The diverter gill or the diverter tube preferably leads to a minimum filling level of the (separated) liquid, provided that the storage of the liquid is beneficial.

[0027] In a preferred variant, the separator can have a cover which surrounds the separator outwardly (radially), wherein the cover is a preferably circumferential fabric layer made of metal fabric or plastic fabric. This facilitates separation, because liquid particles which have passed through the fabric portion of the separator can be separated on the cover or its fabric layer. The outer cover is also located in the flow path connecting the inlet and the outlet. In other words, the flow path passes through the fabric layer of the outer cover. Metal fabric makes the fabric layer more robust. Plastic fabric is more cost-effective and more structurally advantageous. The cover can include a frame to which the fabric layer is fixed.

[0028] It is advantageous if a heating device is provided, via which the fabric layer can be heated. The heating device contributes to the versatility of the liquid separator, since it can also be used at freezing temperatures. The heating device can be electric. In the case of a metal fabric, the heating device can also be a direct electric heating device, as described above, for example a resistance heating.

[0029] It is advantageous if the fabric layer comprises a hydrophobic coating. This coating repels liquids and ensures that liquids still in the gas flow are contained in the space between the housing and the separation device. This improves the separation rate.

[0030] In a preferred variant, the mesh width of the fabric layer of the outer cover can be smaller than the mesh width of the fabric part of the separation device. This also increases the separation rate, because water droplets accumulated in the separation device or its fabric part can be (again) absorbed into the gas flow and captured.

[0031] It is preferred if the liquid separator comprises a liquid reservoir in which the liquid separated by the separation device or separated at the housing is collected. Since the liquid is collected in the liquid reservoir and transferred continuously, there is no need to transfer the liquid continuously. The amount of separated liquid is easier to monitor.

[0032] The liquid reservoir may comprise a liquid outlet, in particular in a lower region of the mounting location of the liquid separator, which liquid outlet may optionally comprise an operable or actuatable valve.

[0033] It is advantageous if the liquid reservoir comprises a rotationally symmetrical cross section. This allows approximately similar filling levels to be achieved in different positions / installation positions or states. This helps to monitor the amount of separated liquid. The liquid reservoir can optionally comprise a conical cross section, wherein the cross section widens towards the separation device (radially).

[0034] In a preferred variant, a fill level sensor can be provided, via which the fill level of the liquid captured in the liquid reservoir can be determined. This helps to monitor the fill level. For example, a signal output can be issued when one or more fill level thresholds (minimum and / or maximum fill levels) are reached. Alternatively, a continuous signal can also be output. The fill level sensor can be a capacitive sensor. The capacitive sensor can be arranged in the central longitudinal direction of the liquid reservoir or parallel to the central longitudinal direction of the liquid reservoir.

[0035] It is advantageous if there is a wall separating the liquid reservoir from the housing part of the liquid separator containing the separation device, wherein the wall comprises an outer slope (radially) facing away from the separation device, the outer slope having one or more edge openings. The wall can largely prevent the inclusion of liquid captured in the liquid reservoir in the gas flow. The wall can also serve as a "baffle", which prevents liquid from splashing out of the liquid reservoir. For example, liquid from the gills of the diverter can flow along the slope of the wall and enter the liquid reservoir via the edge opening. The wall can comprise a bowl-shaped or cone-shaped cross section (decreasing outwards).

[0036] Alternatively, there may be a wall separating the liquid reservoir from the housing portion containing the separation device, wherein the wall comprises an internal slope facing away from the separation device, the internal slope having one or more openings. The wall may comprise a funnel-shaped cross section. This variant may also largely prevent the inclusion of liquid captured in the liquid reservoir in the gas flow. The wall may also act as a "baffle". For example, liquid from the gills of the diverter may flow along the slope of the partition and enter the liquid reservoir via the opening.

[0037] In a preferred variant, the housing of the liquid separator can be made of plastic. This contributes to a structurally simple variant with low weight. This also allows for cost-effective production, for example by injection molding. The housing can include a housing part (top part) in which the separator is located and another housing part (bottom part) in which the liquid reservoir is located.

[0038] Tests have shown that in order to obtain good results the fabric should make an angle of between 1-15°, preferably 1.5-10°, ideally 2-4° to the main flow direction (central longitudinal direction) of the gas flow in the separation device.

[0039] Tests with air-water mixtures have shown that the gas stream containing the liquid (gas / liquid mixture) should reach the fabric at a flow velocity greater than 5 meters per second (>5m / s), ideally greater than 12 meters per second (>12m / s), depending on the desired separation level. For other gas / liquid mixtures, the flow velocity may have to be adjusted.

[0040] When the flow velocity of the test air-water mixture is less than 12 meters per second (<12m / s), the separation level decreases. When it exceeds 12 meters per second (>12m / s), the separation level no longer increases significantly.

[0041] Very good test results were obtained when the angle between the fabric sections was 8°. Fabric threads or wires with a thickness of 160 μm have also proven to be advantageous.

[0042] As mentioned above, the gas / liquid mixture must be directed to the liquid separator at a specific flow rate. For example, the flow energy of the gas / liquid mixture (e.g., flowing in the process) can be used. Alternatively, or in addition, a pump or turbine can be used to bring the gas / liquid mixture to the desired flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention is described in more detail below in conjunction with the accompanying drawings, in which identical or functionally equivalent elements have the same reference numerals or are designated only once with their reference numerals when necessary. In the following drawings:

[0044] Figure 1 A perspective view showing a variation of a liquid separator;

[0045] Figure 2 Shows Figure 1 A liquid separator in which the top of the shell is cut open;

[0046] Figure 3 Shows Figure 1 A liquid separator in which the top and bottom of the shell are cut open;

[0047] Figure 4 Shows Figure 1 An enlarged view of a liquid separator with the top of the housing and the outer cover of the separation device cut away;

[0048] Figure 5 Shows Figure 1 An internal view of a separation device of a liquid separator;

[0049] Figure 6a -c shows a perspective view of the liquid separator ( Figure 6a )、Main View( Figure 6b ) and side view ( Figure 6c );

[0050] Figure 7 Shows Figure 1 An internal view of the top of the housing of the liquid separator. DETAILED DESCRIPTION

[0051] Figure 1 A liquid separator for separating liquid from a flowing gas / liquid mixture is shown, wherein the liquid separator is generally designated by reference numeral 10 .

[0052] The liquid separator 10 includes an inlet 12 (gas / liquid inlet 12), an outlet 14 (gas outlet 14) and a flow path 16 connecting the inlet 12 and the outlet 14 (the flow path 16 runs through the entire column, indicated by reference numeral 16, and leads from the inlet 12 to the outlet 14; see Figure 2 or Figure 3 ).

[0053] The liquid separator 10 comprises a housing 18 on or in which the components of the liquid separator 10 are arranged and / or attached. The housing 18 comprises a first housing portion 20 (housing top 20) comprising a separation device 22 and a second housing portion 24 (housing bottom 24) comprising a liquid reservoir.

[0054] The flow path 16 describes the path followed by the gas flow (containing liquid) as it is directed into the inlet 12 as a gas / liquid mixture, directed through the separation device 22 (where the liquid is separated), and directed out as a gas flow (substantially free of any liquid, if any) through the outlet 14. Thus, the flow path 16 constitutes the path of a flow connection from the inlet 12 through the separation device 22 to the outlet 14. The flow path or flow connection 16 is defined to the outside by components and partitions (without separate reference numerals) of the liquid separator 10.

[0055] The inlet 12 and the outlet 14 are located at the first housing portion 20. The second housing portion 24 includes a liquid outlet 28 through which separated liquid can be transferred from the liquid reservoir 26. Regardless, the housing 18 can be made of plastic.

[0056] The separating device 22 is arranged in the first housing part 20 and is surrounded radially outward by a housing 30 which is also arranged in the first housing part 20 (see Figures 2 to 5 ).

[0057] The separating device 22 comprises a housing 32 on which or in which the components of the separating device 22 are located and, if applicable, attached. The housing 32 comprises a connecting portion 34 having an annular cross section, a fabric holding portion 36 and a diverter gill 38. For example, the connecting portion 34 is used to connect the separating device 22 to a pipeline leading from the inlet 12. The connecting portion 34 can be radially enlarged relative to the fabric holding portion 36.

[0058] The fabric holding portion 36 comprises a fabric portion for liquid separation. The separation device 22 comprises a first fabric portion 40 for liquid separation, through which the flow path 16 passes (first sub-flow), wherein the first fabric portion 40 is positioned at an angle of 1° to 15° relative to a main flow direction 42 in the separation device 22 (see Figure 5 6 ). The main flow direction 42 is oriented along or parallel to a central longitudinal direction 44 of the separation device 22 .

[0059] The separation device 22 further comprises a second fabric portion 46 for liquid separation, through which the flow path 16 (second sub-path) passes, wherein the second fabric portion 46 is positioned opposite to the first fabric portion 40 and forms an angle of 2° to 30° with the first fabric portion 40. The first fabric portion 40 and the second fabric portion 46 are positioned symmetrically with respect to the main flow direction 42 in the separation device 22. The gas flow containing the liquid is divided into two branch flows (a first branch flow and a second branch flow) at the separation device 22.

[0060] The separating device 22 comprises a U-shaped or V-shaped cross section at the fabric holding portion 36, which is closed at the front by a front partition (48, 50, respectively) (see FIG. Figures 6a to 6c ).

[0061] The fabric parts 40, 46 can both be made of plastic fabric or metal fabric. In particular in the case of metal fabric, a heating device (not shown) can optionally be provided, via which the fabric parts 40, 46 can be heated respectively. The heating device can be an electric heating device, preferably a direct heating device, for example in the form of resistance heating as described above.

[0062] Optionally, the fabric parts 40, 46 of the separation device 22 may include a hydrophilic coating. In any case, the fabric threads or wires of the fabric parts 40, 46 oriented perpendicular to the main flow direction 42 of the separation device 22 may include a greater thickness than the fabric threads or wires oriented at least partially longitudinally with respect to the main flow direction 42 vector.

[0063] As mentioned above, the separating device 22 comprises a housing 32, on which the components of the separating device 22 are arranged and, if applicable, attached. The housing 32 can be made of plastic or metal. In particular in the case of a metal housing 32, a heating device (not shown) can optionally be provided, via which the housing 32 can be heated. As mentioned above, the heating device can be an electric heating device, for example in the form of a direct heating device.

[0064] The outer cover 30 comprises a fabric layer 52 made of metal fabric or plastic fabric at least in a large part or in the entire circumference. The fabric layer 52 is attached to a frame 54 of the outer cover 30 or is held in place by the frame. In particular, in the case where the fabric layer 52 is made of metal fabric, a heating device can be provided, via which the fabric layer 52 can be heated. As mentioned above, the heating device can be an electric heating device, for example in the form of direct heating.

[0065] The fabric layer 52 may include a hydrophobic coating. Independently of this, the mesh width of the fabric layer 52 of the outer cover 30 may be smaller than the mesh width of the fabric portions 40 , 46 .

[0066] As described above, the liquid separator 10 includes a liquid reservoir 26 in its second housing portion 24 (housing bottom 24), in which the liquid separated at or by the separation device 22 and / or the housing 30 is captured. The captured liquid can be intermittently transferred via the liquid diverter 28, for example, via the operation of a valve mounted on or in the liquid diverter 28.

[0067] The liquid reservoir 26 has a rotationally symmetrical cross section. The cross section of the second housing part 24 widens radially toward the separating device 22 .

[0068] An optional fill level sensor 56 is also provided, via which the fill level of the liquid captured in the liquid reservoir 26 can be determined. This helps to monitor the fill level or a fill level threshold. The fill level sensor 56 is a capacitive sensor and is oriented along a central longitudinal direction 58 of the liquid reservoir 26.

[0069] A wall 60 is also provided, which separates the liquid reservoir 26 from the first housing part 20 in which the separation device 22 is located. The wall 60 comprises a ramp facing (radially) outwards away from the separation device 22, which has one or more edge openings 62.

[0070] The diverter gills 38 may open into the wall 60 or open into the wall 60. The liquid separated at the separation device 22 may flow via the diverter gills 38 to the wall 60. Here, the liquid reaches the opening 62 via the slope on the wall 60, where the liquid can flow into the liquid reservoir 26.

[0071] The housing of the liquid reservoir 10 , ie, the first housing portion 20 and the second housing portion 24 , may be made of plastic.

[0072] The working principle of the liquid separator 10 is as follows:

[0073] A flowing gas / liquid mixture (gas stream containing liquid) is introduced into the liquid separator 10 via the inlet 12. A conduit (without reference numeral) is used to introduce the gas / liquid mixture into the separation device 22, in which the liquid is actually separated. To this end, the gas / liquid mixture is led through the fabric portions 40, 46, wherein the liquid remains at the fabric portions 40, 46, and the gas stream (which may still contain some liquid) passes through the fabric portions 40, 46. As described above, the gas stream is then divided into two sub-streams.

[0074] The gas stream (which may still contain some liquid) is then directed through the fabric layer 52 of the housing 30 where any remaining liquid is separated. The gas stream passes through the fabric layer 52 and then along the flow path 16 through the outlet 14 and out of the liquid separator 10.

[0075] Liquid separated at the fabric portions 40, 46 (eg, via gravity) flows via the diverter gills 38 toward the wall 60. Liquid separated at the fabric layer 52 also reaches the wall 60 (eg, via gravity).

[0076] The liquid reaches the opening 62 via the slope on the wall 60, from which the liquid can flow to the liquid reservoir 26. The separated liquid can be diverted from the liquid reservoir 26 via the liquid diverter 28.

Claims

1. A liquid separator (10) for separating a liquid from a gas / liquid mixture, the liquid separator comprising an inlet (12), an outlet (14), a flow path (16) connecting the inlet (12) to the outlet (14), and at least one separation device (22) arranged in the flow path (16), in, The separation device (22) has a first fabric part (40) for liquid separation, through which the flow path (16) passes, the first fabric part (40) being arranged at an angle of 1° to 15° with respect to a main flow direction (42) in the separation device (22), The separation device (22) comprises a second fabric portion (46) for liquid separation, the flow path (16) passing through the second fabric portion, wherein the second fabric portion (46) is positioned opposite to the first fabric portion (40) and forms an angle of 2° to 30° with the first fabric portion (40), The separation device (22) comprises a housing (32), to which or in which the components of the separation device (22) are attached, so that the components of the separation device (22) are fixed relative to each other and the separation device (22) can be handled as a unit or assembly, The invention is characterized in that the separating device (22) comprises an outer cover (30) surrounding the separating device (22) toward the outside, wherein the outer cover (30) has a fabric layer (52) of a metal fabric or a plastic fabric.

2. The liquid separator (10) according to claim 1, characterized in that: The first fabric part (40) and the second fabric part (46) are arranged symmetrically with respect to the main flow direction (42) in the separation device (22).

3. The liquid separator (10) according to claim 1, characterized in that: The first and second fabric portions (40, 46) are respectively made of metal fabric.

4. The liquid separator (10) according to claim 1, characterized in that The first and second fabric portions (40, 46) are respectively made of plastic fabric.

5. The liquid separator (10) according to claim 1, characterized in that: The first and second fabric portions (40, 46) include a hydrophilic coating.

6. The liquid separator (10) according to any one of the preceding claims, characterized in that The fabric threads of the first and second fabric parts (40, 46) oriented perpendicularly to a main flow direction (42) in the separating device (22) are thicker than the fabric threads oriented longitudinally with respect to the main flow direction (42).

7. The liquid separator (10) according to claim 1, characterized in that: The housing (32) of the separating device (22) is made of plastic or metal.

8. The liquid separator (10) according to claim 1, characterized in that A heating device capable of heating the housing (32) is provided.

9. The liquid separator (10) according to claim 1, characterized in that: The housing (32) of the separation device (22) comprises a diverter gill (38) or a diverter tube.

10. The liquid separator (10) according to claim 1, characterized in that A heating device capable of heating the fabric layer (52) is provided.

11. The liquid separator (10) according to claim 1, characterized in that The fabric layer (52) includes a hydrophobic coating.

12. The liquid separator (10) according to claim 1, characterized in that The mesh width of the fabric layer (52) of the outer cover (30) is smaller than the mesh width of the first and second fabric portions (40, 46) of the separation device (22).

13. The liquid separator (10) according to claim 1, characterized in that The liquid separator (10) comprises a liquid reservoir (26) in which the liquid separated at the separation device (22) is collected.

14. The liquid separator (10) according to claim 13, characterized in that The liquid reservoir (26) comprises a rotationally symmetrical cross section.

15. The liquid separator (10) according to claim 13, characterized in that A fill level sensor (56) is provided, by means of which the fill level of the liquid collected in the liquid reservoir (26) can be determined.

16. The liquid separator (10) according to claim 13, characterized in that There is a wall (60) separating the liquid reservoir (26) from the housing part (20) in which the separation device (22) is located, wherein the wall (60) comprises a slope facing outwardly away from the separation device (22) and having one or more openings (62) at the edge.

17. The liquid separator (10) according to claim 13, characterized in that There is a wall separating the liquid reservoir (26) from the housing portion (20) in which the separation device (22) is located, wherein the wall comprises an inner bevel facing away from the separation device (22), the inner bevel having one or more openings.

18. The liquid separator (10) according to claim 1, characterized in that The housing (18) of the liquid separator (10) is made of plastic.

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