Bubble separation device and liquid preparation system

Abstract

The utility model relates to the technical field of liquid preparation, and discloses a bubble separation device and a liquid preparation system. The bubble separation device comprises a separation tank and a floating ball, the separation tank comprises a defoaming chamber, a liquid inlet, a liquid outlet and an exhaust port, the liquid inlet, the liquid outlet and the exhaust port are communicated with the defoaming chamber, the defoaming chamber is used for containing feed liquid, the liquid inlet and the exhaust port are located on the upper side of the defoaming chamber, the liquid outlet is located on the lower side of the defoaming chamber, and the floating ball is arranged in the defoaming chamber and used for suspending in the feed liquid. A slit is formed between the floating ball and the side wall of the defoaming chamber and is positioned between the liquid inlet and the liquid outlet. According to the defoaming device, bubbles can be prevented from reaching one side of the liquid outlet in a physical blocking and surface adsorption manner, so that a better defoaming effect can be generated.

Description

Technical Field

[0001] This utility model relates to the field of liquid preparation technology, specifically to a bubble separation device and a liquid preparation system. Background Technology

[0002] In liquid preparation systems in the food, cosmetics, medical device, and pharmaceutical industries, after medium- and high-viscosity ingredients are prepared, the liquid needs to be sent downstream by compressed air. Air bubbles always appear when the liquid passes through pipes, bends, and valve groups. At the same time, a large number of air bubbles are also generated at the end of the liquid delivery because the liquid is not full in the pipe.

[0003] Some related technologies involve arranging defoaming tanks with porous structures in pipelines. When the liquid passes through the defoaming tank, tiny bubbles are adsorbed onto the surface of the porous structure and continuously accumulate and converge to form large bubbles. Finally, under the action of buoyancy, the bubbles detach from the porous structure and float to the surface of the liquid, thus completing the defoaming of the liquid.

[0004] However, high-viscosity liquids have a higher surface tension, which increases the force exerted by the liquid on the bubbles attached to the porous structure. Medium-sized bubbles with insufficient buoyancy may detach from the porous structure prematurely under the action of the liquid and be carried downstream by the liquid, resulting in an unsatisfactory defoaming effect. Utility Model Content

[0005] In view of this, the present invention provides a bubble separation device and a liquid preparation system to solve the problem that the defoaming effect of high-viscosity liquids is not ideal.

[0006] In a first aspect, this utility model provides a bubble separation device, including a separation tank and a float. The separation tank includes a defoaming chamber and an inlet, an outlet, and an exhaust port communicating with the defoaming chamber. The defoaming chamber is used to contain the material liquid. The inlet and the exhaust port are located on the upper side of the defoaming chamber, and the outlet is located on the lower side of the defoaming chamber. The float is disposed in the defoaming chamber and is used to suspend in the material liquid. A slit is formed between the float and the side wall of the defoaming chamber, and the slit is located between the inlet and the outlet.

[0007] Beneficial effects: The liquid enters the separator from the inlet and exits from the outlet through the slit. On the one hand, the slit can trap bubbles larger than the slit size. These bubbles will remain on the side of the slit near the inlet and merge to form larger bubbles, eventually overcoming the surface tension of the liquid and floating away from it. On the other hand, the float will rotate under the uneven tangential force of the liquid. Bubbles smaller than the slit size will adhere to the surface of the float and return to the side of the slit near the inlet through the rotation of the float, merging with other bubbles to form larger bubbles, eventually overcoming the surface tension of the liquid and floating away from it. The bubble separation device can limit the bubbles from reaching the outlet side through physical blocking and surface adsorption, thus producing a better defoaming effect. Furthermore, the float is spherical, which can minimize the new bubbles generated when the liquid impacts.

[0008] In one alternative embodiment, the slit is immersed in the liquid.

[0009] Beneficial effects: By immersing the slit in the liquid, it is possible to prevent the formation of a cavity on the side of the slit near the outlet, and to prevent air in the cavity from mixing into the liquid and forming new bubbles during the flow of the liquid.

[0010] In one alternative embodiment, the maximum distance from the inlet to the top of the defoaming chamber is less than the radius of the float.

[0011] Beneficial effects: During the material conveying process, the position of the float moves up and down in the defoaming chamber as the liquid level changes. Under extreme conditions, the top of the float and the top of the defoaming chamber come into contact with each other, reaching the highest position. By establishing a relationship between the position of the inlet and the radius of the float, it can be ensured that the position of the slit is still between the inlet and the outlet, thus ensuring the normal operation of the bubble separation device.

[0012] In one optional embodiment, the difference between the diameter of the defoaming chamber and the diameter of the float is greater than or equal to 2 mm and less than or equal to 4 mm.

[0013] Beneficial effects: If the slit is too large, the bubbles passing through it will be too big, and the force exerted by the liquid will be stronger, making it difficult for them to be stably adsorbed on the surface of the float. If the slit is too small, the flow area will be reduced, affecting the flow efficiency of the liquid, and it will also cause problems such as assembly difficulties. By limiting the diameter, the size of the slit can be controlled to a suitable size.

[0014] In one alternative embodiment, the liquid inlet is located on the side wall of the defoaming chamber, and the vent is located on the top wall of the defoaming chamber, on the side of the defoaming chamber away from the liquid inlet.

[0015] Beneficial effects: By setting the inlet on the side wall, the flow path of the liquid can be further deviated from the center of the float, thereby generating a stronger tangential force on the float, causing the float to rotate under the impact of the liquid, and sending the air bubbles on the surface of the float back to the side of the slit near the inlet.

[0016] In an alternative embodiment, a sight glass is also included, wherein the separation tank includes an observation port communicating with the defoaming chamber, and the sight glass is disposed at the observation port.

[0017] Beneficial effects: The sight glass allows observation of the defoaming chamber, enabling timely detection of any abnormalities in the bubble separation device, thus ensuring the reliability of the bubble separation device.

[0018] In one optional embodiment, the observation port includes a first observation port and a second observation port, the first observation port being located at the top of the defoaming chamber and the second observation port being located on the side wall of the defoaming chamber, and the sight glass includes a first sight glass and a second sight glass, the first sight glass being disposed at the first observation port and the second sight glass being disposed at the second observation port.

[0019] Beneficial effects: The first observation port is suitable for observing the top of the float, and the second observation port is suitable for observing the slit. By setting multiple observation ports, the defoaming chamber can be observed from multiple angles, improving the comprehensiveness of the observation.

[0020] In one optional embodiment, the separation tank includes a tank body and a tank cover, the tank cover being detachably disposed on the tank body, the tank body and the tank cover surrounding and forming the defoaming chamber, the tank cover being provided with the exhaust port, and the tank body being provided with the liquid inlet and the liquid outlet.

[0021] Beneficial effects: The separator adopts a split design, which facilitates the maintenance and replacement of the float and the cleaning of the defoaming chamber. The inlet and outlet are located in the tank body, so that the connection of the bubble separation device and the upstream and downstream pipelines is not affected when the separator is opened, making maintenance simpler.

[0022] Secondly, this utility model also provides a liquid preparation system, including an inlet pipe and a bubble separation device provided by this utility model. The inlet pipe is connected to the inlet for providing liquid, and the outlet is set on a downstream device to deliver liquid downstream.

[0023] Beneficial effects: The liquid preparation system includes the bubble separation device provided by this utility model, and therefore has the beneficial effects brought by the bubble separation device, which will not be elaborated here.

[0024] In one alternative embodiment, the liquid preparation system further includes a flow valve disposed at the inlet and / or the outlet.

[0025] Beneficial effects: The flow valve can control the input and / or output flow of the liquid, thereby actively controlling the liquid level in the defoaming chamber, ensuring that the liquid level is always higher than the slit, and ensuring that the slit is submerged in the liquid. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a front view schematic diagram of a bubble separation device according to an embodiment of the present utility model;

[0028] Figure 2 This is a cross-sectional schematic diagram of a bubble separation device according to an embodiment of the present invention, showing a floating state of a float;

[0029] Figure 3 This is a cross-sectional schematic diagram of a bubble separation device according to an embodiment of the present invention, showing another floating state of the float;

[0030] Figure 4 This is a top view schematic diagram of the bubble separation device according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Separator; 101. Defoaming chamber; 102. Liquid inlet; 103. Liquid outlet; 104. Exhaust port; 105. Tank body; 106. Tank lid; 2. Float; 301. First sight glass; 302. Second sight glass. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a," "an," and "comprising" as used herein may also mean including the plural forms. The terms "comprising," "including," and "having" are inclusive and therefore indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0035] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Furthermore, in the description of this utility model, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "end," "length," "inner," "outer," etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation, in addition to those depicted in the figure. For example, if the mechanism in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0037] In related technologies, a defoaming chamber is generally used to eliminate air bubbles in the liquid. The liquid flows within the tortuous flow channel formed by the defoaming chamber and passes through multiple porous structures. Air bubbles can be adsorbed by the porous structures and aggregate into large bubbles, thus detaching from the liquid.

[0038] However, as the viscosity of the liquid increases, the force exerted by the liquid on the bubbles increases. Some medium-sized bubbles may detach from the porous structure prematurely under the force of the liquid. However, the buoyancy of the bubbles is not enough to make them float out of the liquid. As a result, the bubbles are carried downstream by the liquid, resulting in defoaming failure.

[0039] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0040] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, a bubble separation device is provided, including a separation tank 1 and a float 2. The separation tank 1 includes a defoaming chamber 101 and an inlet 102, an outlet 103 and an exhaust port 104 communicating with the defoaming chamber 101. The defoaming chamber 101 is used to contain the liquid. The inlet 102 and the exhaust port 104 are located on the upper side of the defoaming chamber 101, and the outlet 103 is located on the lower side of the defoaming chamber 101. The float 2 is disposed in the defoaming chamber 101 and is used to suspend in the liquid. A slit is formed between the float 2 and the side wall of the defoaming chamber 101. The slit is located between the inlet 102 and the outlet 103.

[0041] During operation, the bubble separation device is connected to the liquid distribution system. The liquid enters the separation tank 1 from the inlet 102 and is discharged from the outlet 103 through the slit.

[0042] On the one hand, the slit can trap bubbles larger than the slit size. These bubbles will remain on the side of the slit near the inlet 102 and merge with each other to form larger bubbles, eventually overcoming the surface tension of the liquid and floating away from the liquid.

[0043] On the other hand, the flow of liquid will also exert a tangential force on the float 2. Under the action of the uneven tangential force of the liquid, the float 2 will rotate. Bubbles smaller than the size of the slit will be adsorbed on the surface of the float 2 and return to the side of the slit near the inlet 102 through the rotation of the float 2. They will merge with other bubbles to form larger bubbles and eventually overcome the surface tension of the liquid and float away from the liquid.

[0044] The bubble separation device can limit the bubbles from reaching the outlet 103 side through physical blocking and surface adsorption, thereby producing a better defoaming effect.

[0045] Furthermore, the float 2 is spherical in shape with a smooth and continuous surface, which minimizes the generation of new bubbles when the liquid impacts the material.

[0046] Understandably, high-viscosity liquid flows will harden bubbles, inhibit bubble deformation, and prevent large bubbles from passing through narrow slits in a narrow shape. Therefore, bubble separation devices are particularly suitable for defoaming high-viscosity liquid flows, meeting the liquid preparation needs of food, cosmetics, medical devices, pharmaceuticals and other fields.

[0047] In some embodiments, the slit is submerged in the liquid. By submerging the slit in the liquid, it is possible to prevent the formation of a cavity on the side of the slit near the outlet 103, and to prevent air in the cavity from mixing into the liquid and forming new bubbles during the flow of the liquid.

[0048] Specifically, the appropriate size of the float 2 needs to be selected based on the density of the liquid, so that the buoyancy of the float 2 is just enough to submerge more than half of the float 2 in the liquid, thereby submerging the slit. For solid float 2, the specification refers to the material density. For hollow float 2 with an internal air chamber, the specification can be the material density, air chamber size, gas type, air chamber location, etc. Therefore, hollow float 2 has more flexible and adjustable characteristics.

[0049] For example, in some embodiments, the float 2 is hollow and made of 316L stainless steel. 316L stainless steel has strong stability and is not easy to react with the liquid, which can avoid the bubble separation device from affecting the quality of the liquid. By adjusting the position of the air chamber, the 316L stainless steel float 2 can float on the liquid as designed.

[0050] In some embodiments, the surface of the float 2 is smooth, thereby reducing the difficulty of merging bubbles on the surface, facilitating the smooth merging and discharge of bubbles, and further reducing the generation of new bubbles during liquid impact. Specifically, the float 2 can be manufactured with a surface roughness that meets the requirements by means of grinding, polishing, or other methods.

[0051] Understandably, during the liquid conveying process, the position of the float 2 fluctuates up and down within the defoaming chamber 101 as the liquid level changes. Under extreme conditions of insufficient liquid, the bottom of the float 2 contacts the top of the defoaming chamber 101, reaching its lowest position. At this point, the slit may be above the liquid surface, causing a cavity to form on the side of the slit near the outlet 103, affecting the defoaming effect. Therefore, in some embodiments, the height of the liquid level is made greater than the radius of the float 2, thereby ensuring that the slit is always submerged in the liquid.

[0052] It should also be noted that under extreme conditions of excessive liquid, the liquid almost fills the defoaming chamber 101, and the top of the float 2 and the top of the defoaming chamber 101 come into contact with each other, reaching the highest position. (Refer to...) Figure 3In some embodiments, the maximum distance M from the inlet 102 to the top of the defoaming chamber 101 is less than the radius N of the float 2. By establishing a relationship between the position of the inlet 102 and the radius of the float 2, it can be ensured that the position of the slit is still between the inlet 102 and the outlet 103, thus ensuring the normal operation of the bubble separation device.

[0053] For example, the difference between the radius N and the maximum distance M is greater than 2 cm. By maintaining a drop of at least 2 cm, it helps to ensure the rotation of the float 2 under the action of the tangential force of the liquid, and prompts the smaller air bubbles adsorbed on the surface of the float 2 to return to the side of the slit near the inlet 102 in a timely manner.

[0054] In some embodiments, the difference between the diameter of the defoaming chamber 101 and the diameter of the float 2 is less than or equal to 4 mm. If the slit is too large, the bubbles passing through the slit will be too large, and the force exerted by the liquid will be increased, making it difficult for them to be stably adsorbed on the surface of the float 2. By limiting the diameter, the size of the slit can be controlled to a suitable size.

[0055] Furthermore, in some embodiments, the difference between the diameter of the defoaming chamber 101 and the diameter of the float 2 is greater than or equal to 2 mm. If the slit is too small, the flow area will be reduced, affecting the flow efficiency of the liquid and causing assembly difficulties. Limiting the minimum size helps to ensure the flow performance of the bubble separation device.

[0056] In some embodiments, the inlet 102 is located on the side wall of the defoaming chamber 101, and the outlet 104 is located on the top wall of the defoaming chamber 101, and on the side of the defoaming chamber 101 away from the inlet 102.

[0057] By placing the inlet 102 on the side wall, the flow path of the liquid can be further deviated from the center of the float 2, thereby generating a stronger tangential force on the float 2. This causes the float 2 to rotate under the impact of the liquid, sending air bubbles on the surface of the float 2 back to the side of the slit closest to the inlet 102. Placing the vent 104 at the top allows the vent 104 to be as high as possible, reducing the risk of liquid entering the vent 104 in extreme cases. The vent 104 being located at the far end of the inlet 102 further prevents liquid leaving the inlet 102 from accidentally entering the vent 104.

[0058] In some embodiments, the bubble separation device further includes a sight glass, and the separation tank 1 includes an observation port communicating with the defoaming chamber 101, with the sight glass disposed at the observation port. The sight glass allows observation of the conditions inside the defoaming chamber 101, enabling timely detection of any potential abnormalities in the bubble separation device for appropriate handling, thereby ensuring the reliability of the bubble separation device.

[0059] For example, refer to Figure 1 and Figure 4In some embodiments, the observation ports include a first observation port and a second observation port. The first observation port is located at the top of the defoaming chamber 101, and the second observation port is located on the side wall of the defoaming chamber 101. The sight glasses include a first sight glass 301 and a second sight glass 302. The first sight glass 301 is disposed at the first observation port, and the second sight glass 302 is disposed at the second observation port. The first observation port is suitable for observing the top of the float 2, and the second observation port is suitable for observing the slit. By providing multiple observation ports, the defoaming chamber 101 can be observed from multiple angles, improving the comprehensiveness of the observation.

[0060] In some embodiments, the second observation port extends vertically, and the distance from the upper end of the second observation port to the top of the defoaming chamber 101 is less than the radius of the float 2, and the distance from the lower end of the second observation port to the bottom of the defoaming chamber 101 is less than the radius of the float 2. It is understood that, regardless of how the float 2 floats within the defoaming chamber 101, the slit remains within the observable range of the second observation port, thus fully satisfying the observation requirements.

[0061] Optionally, in some embodiments, the sight glass is fixed to the can lid 106 by a sealing gasket and flange. The sight glass is preferably made of a material that can withstand temperatures below 130°C and remain unchanged for more than 2 hours. Additionally, a light can be installed on the outside of the sight glass to observe the position of the float 2 and its internal separation.

[0062] In some embodiments, the separator 1 includes a tank body 105 and a tank cover 106. The tank cover 106 is detachably mounted on the tank body 105. The tank body 105 and the tank cover 106 surround and form a defoaming chamber 101. The tank cover 106 is provided with an exhaust port 104, and the tank body 105 is provided with an inlet 102 and an outlet 103. The separator 1 adopts a split design, which facilitates the maintenance and replacement of the float 2 and the cleaning of the defoaming chamber 101. By placing the inlet 102 and the outlet 103 on the tank body 105, the connection of the bubble separation device and the upstream and downstream pipelines is not affected when the separator 1 is opened, making maintenance simpler.

[0063] Optionally, in some embodiments, the tank body 105 and the tank cover 106 are connected by a chuck connection, which facilitates disassembly, cleaning and sterilization. The exhaust port 104 is connected to the tank cover 106 by welding. The liquid inlet 102 and the liquid outlet 103 are connected to the tank body 105 by welding. The welding position needs to be polished to avoid affecting the flow field.

[0064] In some embodiments, the bubble separation device further includes an electric heating jacket, which is fitted around the outer periphery of the separation tank 1 for heat preservation or heating of the separation tank 1, thereby facilitating the merging of bubbles.

[0065] Secondly, this utility model also provides a liquid preparation system, including an inlet pipe and a bubble separation device provided by this utility model. The inlet pipe is connected to the inlet 102 for providing liquid, and the outlet 103 is set on the downstream device to deliver liquid downstream.

[0066] The liquid preparation system includes the bubble separation device provided by this utility model, and therefore has the beneficial effects brought by the bubble separation device, which will not be described in detail here.

[0067] Understandably, liquid dispensing systems can be used in the food, cosmetics, medical device, and pharmaceutical industries to deliver liquids to downstream devices such as filling machines, mobile storage tanks, and mixing tanks. The bubble separator is located at the end of the liquid dispensing system (i.e., before the downstream devices such as filling machines, mobile storage tanks, and mixing tanks). After the liquid leaves the outlet 103, it enters the downstream device. The bubble separator helps separate and remove bubbles that appear in the pipes, bends, and valve groups of the liquid dispensing system, ensuring effective bubble separation.

[0068] Optionally, in some embodiments, the liquid dispensing system further includes a flow valve located at the inlet and / or outlet. The flow valve controls the input and / or output flow rates of the liquid, thereby actively controlling the liquid level within the defoaming chamber 101 to ensure that the liquid level is always higher than the slit (i.e., the height of the liquid surface is greater than the radius of the float 2), ensuring that the slit is submerged in the liquid.

[0069] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A bubble separation device, characterized by, include: The separation tank (1) includes a defoaming chamber (101) and an inlet (102), an outlet (103) and an exhaust port (104) communicating with the defoaming chamber (101). The defoaming chamber (101) is used to contain the liquid. The inlet (102) and the exhaust port (104) are located on the upper side of the defoaming chamber (101), and the outlet (103) is located on the lower side of the defoaming chamber (101). A float (2) is disposed in the defoaming chamber (101) and is used to suspend in the liquid. A slit is formed between the float (2) and the side wall of the defoaming chamber (101). The slit is located between the inlet (102) and the outlet (103).

2. The bubble separation device of claim 1, wherein, The slit is submerged in the liquid.

3. The bubble separation device of claim 2, wherein, The maximum distance from the liquid inlet (102) to the top of the defoaming chamber (101) is less than the radius of the float (2).

4. The bubble separation device of claim 2, wherein, The difference between the diameter of the defoaming chamber (101) and the diameter of the float (2) is greater than or equal to 2 mm and less than or equal to 4 mm.

5. The bubble separation device of claim 1, wherein, The liquid inlet (102) is located on the side wall of the defoaming chamber (101), and the exhaust port (104) is located on the top wall of the defoaming chamber (101) and on the side of the defoaming chamber (101) away from the liquid inlet (102).

6. The bubble separation device of claim 1, wherein, It also includes a sight glass, and the separation tank (1) includes an observation port communicating with the defoaming chamber (101), with the sight glass disposed at the observation port.

7. The bubble separation device of claim 6, wherein, The observation port includes a first observation port and a second observation port. The first observation port is located at the top of the defoaming chamber (101), and the second observation port is located on the side wall of the defoaming chamber (101). The sight glass includes a first sight glass (301) and a second sight glass (302). The first sight glass (301) is disposed at the first observation port, and the second sight glass (302) is disposed at the second observation port.

8. The bubble separation device of claim 1, wherein, The separation tank (1) includes a tank body (105) and a tank cover (106). The tank cover (106) is detachably mounted on the tank body (105). The tank body (105) and the tank cover (106) surround and form the defoaming chamber (101). The tank cover (106) is provided with the exhaust port (104). The tank body (105) is provided with the liquid inlet (102) and the liquid outlet (103).

9. A liquid preparation system characterized by comprising: include: The bubble separation device according to any one of claims 1 to 8, wherein the liquid outlet (103) is provided on a downstream device to deliver the liquid downstream; An inlet pipe is connected to the inlet (102) for supplying the liquid.

10. The liquid preparation system according to claim 9, wherein It also includes a flow valve, which is disposed at the inlet (102) and / or the outlet (103).

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