A deaerator

Abstract

The utility model relates to a kind of bubble traps, comprising: the first shell and the second shell of being connected;Diaphragm is crimped between the first shell and the second shell;Liquid cavity is formed between diaphragm and the first shell;Gas cavity is formed between diaphragm and the second shell, diaphragm can allow gas in liquid cavity to pass through diaphragm and enter into gas cavity, diaphragm can block liquid in liquid cavity to enter into gas cavity;Liquid inlet and liquid outlet are set on the first shell, liquid inlet and liquid outlet are all communicated with liquid cavity;Gas outlet is set on the second shell, and gas outlet is communicated with gas cavity;Supporting portion is provided in gas cavity, and supporting portion is in contact with diaphragm;The plane perpendicular to the central axis of liquid inlet is set as the first reference surface, and the projection of liquid inlet and the projection of supporting portion at least partially coincide on the first reference surface projection.

Description

Technical Field

[0001] This utility model relates to the field of defoamer technology, and in particular to a defoamer. Background Technology

[0002] A defoamer is a device used to remove gas and air bubbles from a liquid. Defoamers are used in biopharmaceutical and cell culture applications to remove air bubbles from biological feed solutions. They are also used in some medical devices to remove air bubbles from liquids.

[0003] The defoamer has a liquid chamber and a gas chamber inside, separated by a membrane that allows gas to pass through but not liquid. Under normal operation, the liquid to be defoamed will enter the liquid chamber, and the gas and bubbles contained in the liquid will pass through the membrane and enter the gas chamber, thereby achieving degassing and defoaming of the liquid. In order to achieve better degassing and defoaming effect, the gas chamber is often kept in a negative pressure environment so that the gas and bubbles in the liquid chamber can more easily enter the gas chamber.

[0004] However, during use, the pressure inside the liquid chamber is relatively high. The liquid exerts a force on the diaphragm towards the gas chamber, making the diaphragm prone to deformation towards the gas chamber. Over time, this can reduce the diaphragm's lifespan. In particular, the portion of the diaphragm opposite the liquid inlet of the liquid chamber is more susceptible to damage and deformation due to the pressure of the liquid and the impact force of the liquid during inlet. Utility Model Content

[0005] This invention provides a defoamer that supports the diaphragm by rationally setting a support part in the gas chamber, thereby extending the service life of the diaphragm.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A defoamer includes a first housing and a second housing, wherein the first housing and the second housing are connected.

[0008] A diaphragm is pressed between the first housing and the second housing;

[0009] A liquid cavity is formed between the diaphragm and the first housing;

[0010] A gas chamber is formed between the diaphragm and the second housing. The diaphragm allows gas in the liquid chamber to pass through the diaphragm and enter the gas chamber, while the diaphragm prevents liquid in the liquid chamber from entering the gas chamber.

[0011] A liquid inlet and a liquid outlet are provided on the first housing, and both the liquid inlet and the liquid outlet are connected to the liquid cavity;

[0012] An air outlet is provided on the second housing, and the air outlet is connected to the gas chamber;

[0013] The gas chamber is provided with a support portion, and the support portion can abut against the diaphragm to support the diaphragm;

[0014] A plane perpendicular to the central axis of the inlet is designated as the first reference plane. On the orthographic projection of the first reference plane, the projection of the inlet and the projection of the support part are at least partially coincident.

[0015] Liquid enters the liquid chamber through the inlet and flows out through the outlet. Within the liquid chamber, any gas or air bubbles contained within will pass through the diaphragm and enter the gas chamber. The diaphragm, however, blocks the liquid from entering the gas chamber, thus removing gas and air bubbles from the liquid. This invention utilizes a support within the gas chamber. When the diaphragm deforms towards the gas chamber under the influence of the liquid in the liquid chamber, it abuts against the support. This support prevents excessive deformation of the diaphragm towards the gas chamber under the pressure of the liquid in the liquid chamber, ensuring the diaphragm is less prone to damage or has a relatively long service life. At the same time, the support and the inlet are at least partially overlapped on the orthographic projection of the first reference plane. This ensures that when the liquid enters from the inlet and directly impacts the diaphragm, the diaphragm at this point will be supported by the support, thus preventing the diaphragm from being easily deformed or damaged by the impact of the liquid. In other words, it disperses the impact force of the inlet fluid on the diaphragm at this point, thereby ensuring the service life of the diaphragm.

[0016] Preferably, the support portion is an annular structure, and the gas chamber is divided into an inner cavity and an outer cavity by the supported portion;

[0017] The air outlet includes portions located on the inner and outer sides of the support portion, with the inner portion directly communicating with the inner cavity and the outer portion directly communicating with the outer cavity; or, the air outlet is located only on the inner or outer side of the support portion, and the support portion is provided with a communicating portion that connects the inner cavity and the outer cavity.

[0018] By designing the support as a ring structure, the entire diaphragm can be supported circumferentially, thus achieving a better support effect for the diaphragm. To ensure effective degassing and defoaming of the liquid in the portions of the liquid chamber opposite to the inner and outer cavities, it is necessary to ensure timely discharge of gas from both cavities. Therefore, the inner and outer cavities are directly connected to the gas outlet to facilitate timely gas discharge, or a connecting portion is provided on the support, allowing indirect communication between the inner or outer cavity and the gas outlet for timely gas discharge. This prevents the inner or outer cavity from being closed, which would prevent the timely discharge of gas and air bubbles from the liquid in the liquid chamber opposite to the inner or outer cavity.

[0019] Preferably, the support portion includes at least two spaced-apart arc-shaped support portions.

[0020] With this configuration, the diaphragm can be supported by at least two arc-shaped support sections. The spacing between the arc-shaped support sections ensures that all parts of the gas chamber are connected, so that the gas in the liquid can be discharged from the outlet in a timely manner after entering each part of the gas chamber.

[0021] Preferably, the first housing has a first wall that fits against the diaphragm, the first wall is provided with an arc-shaped groove, and the liquid cavity is formed between the arc-shaped groove and the diaphragm;

[0022] The inlet and outlet are located at opposite ends of the arc-shaped groove and are connected to the arc-shaped groove.

[0023] This design allows gas to enter through the inlet, flow along the arc-shaped groove, and then exit through the outlet. This ensures a longer flow path for the liquid within the liquid chamber, thereby increasing the residence time of the liquid in the liquid chamber and the contact time with the membrane, thus enabling better removal of gas and bubbles from the liquid.

[0024] Preferably, the arc-shaped groove has a central arc, and the inner and outer walls of the arc-shaped groove are equidistant from the central arc.

[0025] The plane perpendicular to the central axis of the first housing is set as the second reference plane. On the orthographic projection of the second reference plane, the projection of the support part covers the projection of the central arc.

[0026] This design avoids the support surface of the support unit being too close to the inner or outer side of the arc groove, thereby preventing the diaphragm from being subjected to excessive pressure differences between the inner and outer sides of the arc groove, which could lead to excessive deformation and damage to the diaphragm. This ensures that the support unit can better support the diaphragm.

[0027] Preferably, the support portion is a circular ring structure, and the radial distance between the central arc and the inner wall of the support portion is less than the radial distance between the central arc and the outer wall of the support portion.

[0028] If the radial distances between the central arc and the inner and outer walls of the support are equal, the average radius of the liquid cavity on the outer side of the support is greater than the average radius on the inner side in the projection of the second reference plane. Therefore, the liquid on the outer side of the support exerts a greater force on the diaphragm. Based on this, making the radial distance between the central arc and the inner wall of the support smaller than the radial distance between the central arc and the outer wall of the support ensures that the projected areas of the liquid cavity on the inner and outer sides of the support are similar in the projection of the second reference plane. This further ensures that the diaphragms on both the inner and outer sides of the support experience similar liquid pressure, extending the diaphragm's service life.

[0029] Preferably, on the orthographic projection of the second reference plane, the arc-shaped groove includes an end portion and a middle portion. Two ends are provided and are located at both ends of the middle portion. The inner and outer sidewalls of the middle portion are arcs, and the centers of the inner and outer sidewalls of the middle portion are both coincident with the central axis of the first housing.

[0030] The projections of the liquid inlet and the liquid outlet are located within the projections of the two ends, and the central angle of the inner wall of the middle part is greater than 240 degrees.

[0031] This configuration ensures that the inlet and outlet are located at the ends of the arc-shaped groove, respectively. This allows the liquid, after entering the liquid chamber, to flow from one end of the arc-shaped groove to the other. Furthermore, by ensuring that the central angle of the middle section is greater than 240 degrees, it is possible to further guarantee that the central angle of the entire arc-shaped groove occupies more than two-thirds of the total area relative to the entire first shell, ensuring a sufficiently long flow path for the liquid.

[0032] Preferably, the second housing has a second wall that fits against the diaphragm, the second wall having an annular groove, and the gas cavity is formed between the annular groove and the diaphragm;

[0033] Both the annular groove and the arc-shaped groove have circular arc walls, and the radius of the inner wall of the annular groove is equal to the radius of the inner wall of the arc-shaped groove, or the radius of the inner wall of the annular groove is greater than the radius of the inner wall of the arc-shaped groove.

[0034] This design allows the diaphragm to abut against the second wall of the annular groove, preventing the formation of a gap between the diaphragm and the first wall of the annular groove under liquid pressure. This ensures that when the liquid flows within the liquid cavity (arc-shaped groove), especially when the liquid flows along the inner wall of the arc-shaped cavity, the liquid at the inner wall of the arc-shaped cavity will flow along its inner wall and will not flow to the gap with a shorter path. This avoids the liquid having a shorter flow path between the inlet and outlet, which would affect the degassing and defoaming effect of the liquid.

[0035] Preferably, the diaphragm has an inner fixing part and an outer fixing part on the inner side and the outer side of the gas chamber, respectively, and the inner fixing part and the outer fixing part are clamped and fixed between the first wall and the second wall;

[0036] The first housing and the second housing have an inner sealing portion located inside the inner fixing portion, and the first housing and the second housing have an outer sealing portion located outside the outer fixing portion.

[0037] This configuration ensures the sealing of the liquid cavity formed by the arc-shaped groove and the diaphragm, as well as the gas cavity formed by the annular groove and the diaphragm. It also ensures the pressure inside the liquid cavity and the sealing of the gas cavity, preventing gas from being directly discharged to the outside through the edge of the diaphragm. Furthermore, when the gas cavity is under negative pressure, it prevents external gas from entering the gas cavity through the diaphragm.

[0038] Preferably, the inner sealing portion includes a first sealing ring located inside the diaphragm, the first sealing ring being sealed and pressed between the first housing and the second housing;

[0039] The outer sealing part includes an outer annular protrusion and a second sealing ring. The outer annular protrusion is fixedly disposed on the first housing and surrounds the outside of the diaphragm. The second housing is partially located inside the outer annular protrusion. The second sealing ring seals the outer annular protrusion and the second housing.

[0040] With this configuration, the inner side can be sealed by the first sealing ring, ensuring the inner side's airtightness; the outer side is sealed by the cooperation of the outer annular protrusion, the second sealing ring, and the second housing, so that the first housing forms an installation groove surrounded by the outer annular protrusion, and the second housing is installed in the installation groove, having a certain sealing depth. Furthermore, the second housing and the outer annular protrusion are sealed by the second sealing ring, further ensuring the sealing effect.

[0041] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0042] 1. A support wall is provided to support the diaphragm, distributing the forces acting on it to prevent damage and extend its service life.

[0043] 2. Ensure that at least part of the support wall is directly opposite the liquid inlet, so that part of the impact force at the liquid inlet can be borne by the support, further dispersing the impact force on the diaphragm when liquid enters through the liquid inlet, so as to further prevent the diaphragm from being deformed or damaged by the liquid in the liquid chamber, and extend the service life of the diaphragm. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of this utility model;

[0046] Figure 2 This is a top view of the structure of Embodiment 1 of this utility model;

[0047] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0048] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0049] Figure 5 This is a three-dimensional structural diagram of the first shell in Embodiment 1 of this utility model;

[0050] Figure 6 This is a bottom view of the first housing structure in Embodiment 1 of this utility model;

[0051] Figure 7 This is a schematic diagram of the first shell and diaphragm mating structure in Embodiment 1 of this utility model;

[0052] Figure 8 This is a three-dimensional structural diagram of the second shell in Embodiment 1 of this utility model;

[0053] Figure 9 This is a schematic diagram of the support structure in Embodiment 2 of this utility model;

[0054] Figure 10 This is a schematic diagram of the structure of the second shell when the inner diameter of the arc-shaped support part is consistent in Embodiment 3 of this utility model;

[0055] Figure 11 This is a schematic diagram of the structure of the second shell when the inner diameter of the arc-shaped support is inconsistent in Embodiment 3 of this utility model;

[0056] Figure 12 This is a schematic diagram of the structure in which the first wall and the membrane form a gap.

[0057] Explanation of reference numerals in the attached figures:

[0058] 1. First housing; 11. Liquid inlet; 12. Liquid outlet; 13. Arc-shaped groove; 131. Central arc; 132. End; 133. Middle part; 14. First wall; 15. Outer annular protrusion; 16. Mounting hole; 17. Inner annular protrusion; 2. Second housing; 21. Annular groove; 22. Inner annular groove; 23. Outer annular groove; 24. Threaded hole; 25. Second wall; 26. Gas outlet; 3. Diaphragm; 31. Inner fixing part; 32. Outer fixing part; 4. Liquid chamber; 5. Gas chamber; 6. Support part; 61. Connecting part; 62. Arc-shaped support part; 7. First sealing ring; 8. Second sealing ring. Detailed Implementation

[0059] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] Example 1

[0063] This utility model embodiment provides a defoamer, such as Figures 1-4As shown, it includes a first housing 1, a second housing 2, and a diaphragm 3; wherein the first housing 1 and the second housing 2 are connected, and the diaphragm 3 is pressed between the first housing 1 and the second housing 2, thereby forming a liquid cavity 4 between the first housing 1 and the diaphragm 3, and forming a gas cavity 5 between the second housing 2 and the diaphragm 3. A liquid inlet 11 and a liquid outlet 12 are provided on the first housing 1, and both the liquid inlet 11 and the liquid outlet 12 are connected to the liquid cavity 4. Liquid enters the liquid cavity 4 through the liquid inlet 11 and is discharged from the liquid outlet 12.

[0064] A corresponding air outlet 26 is provided on the second housing 2, which is connected to the gas chamber 5. Correspondingly, the diaphragm 3 is set as a gas-permeable but liquid-impermeable membrane. Therefore, the diaphragm 3 allows the gas in the liquid chamber 4 to pass through the diaphragm 3 and enter the gas chamber 5, but it can prevent the liquid in the liquid chamber 4 from entering the gas chamber 5. Thus, the liquid in the liquid chamber 4 can be defoamed (degassed). So the whole process of defoaming is as follows: the liquid enters the liquid chamber 4 from the liquid inlet 11. During the process of the liquid moving from the liquid inlet 11 to the liquid outlet 12 in the liquid chamber 4, the gas in the liquid will pass through the diaphragm 3 and enter the gas chamber 5, and be discharged from the air outlet 26. The defoamed liquid is discharged from the liquid outlet 12, so that liquid can be continuously injected for defoaming.

[0065] Since the diaphragm 3 is located between the liquid chamber 4 and the gas chamber 5, during the defoaming process, the liquid in the liquid chamber 4 will exert pressure on the diaphragm 3, which will force the diaphragm 3 to deform in the direction of the gas chamber 5. Over time, the diaphragm 3 will be deformed for a long time, which will affect its defoaming function and may even cause it to break.

[0066] To address the aforementioned problems, in this embodiment, as follows: Figure 3 as well as Figure 4 As shown, by providing a support part 6 in the gas chamber 5, the support part 6 abuts against the diaphragm 3, thereby applying a supporting force to the diaphragm 3, which will correspondingly disperse the pressure exerted by the liquid on the diaphragm 3, reduce the degree of deformation of the diaphragm 3, and increase the service life of the diaphragm 3.

[0067] Furthermore, the liquid in the liquid chamber 4 exerts a certain pressure on the diaphragm 3 due to its pressure. At the same time, when the liquid enters the liquid chamber 4 from the inlet 11, it enters along the inlet 11 and impacts the diaphragm 3 opposite to the inlet 11. Therefore, the diaphragm 3 at this location experiences the greatest force and is most prone to deformation and damage.

[0068] like Figure 4As shown, a plane perpendicular to the central axis of the inlet 11 is designated as the first reference plane. On the orthographic projection of the first reference plane, the projection of the inlet 11 at least partially coincides with the projection of the support portion 6. This ensures that at least a portion of the support portion 6 is aligned with the inlet direction of the inlet 11, allowing the support portion 6 to absorb a portion of the impact force at the inlet 11. This disperses the impact force of the fluid at the inlet 11 on the diaphragm 3, further preventing the diaphragm 3 from deforming or being damaged by the liquid in the liquid chamber 4. It should be noted that the central axis of the inlet 11 can be perpendicular to the diaphragm 3 or the support portion 6, or it can be non-perpendicular, as long as the projections of the support portion 6 and the inlet 11 on the first reference plane coincide.

[0069] The aforementioned projections can overlap if the projection of the support 6 and the projection of the liquid inlet 11 are partially aligned, such as... Figure 4 As shown, the support portion 6 is positioned opposite the inlet 11, and the width of the support portion 6 is smaller than the diameter of the inlet 11. In this case, the projection of the support portion 6 coincides with the projection of the inlet 11. Alternatively, the entire projection of the inlet 11 falls within the projection of the support portion 6. For example, the inlet 11 and the support portion 6 are directly opposite each other, and the width of the support portion 6 is greater than the diameter of the inlet 11. This ensures that in the projection on the first reference plane, the entire projection of the inlet 11 falls within the projection of the support portion 6. This ensures that when the liquid enters along the inlet 11 and impacts the diaphragm 3, the support portion 6 can effectively support the diaphragm 3, preventing the diaphragm 3 from being damaged by the impact force of the liquid.

[0070] Of course, in other embodiments, the support portion 6 may only have a portion that is opposite to the liquid inlet 11, and in the aforementioned projection, the projection of the support portion 6 falls entirely within the projection of the liquid inlet 11.

[0071] The projection of the aforementioned inlet 11 refers to the projection of the part of the inlet 11 that connects with the liquid chamber 4, and the central axis of the inlet 11 is also the central axis of the part of the inlet 11 that connects with the liquid chamber 4.

[0072] Furthermore, the support portion 6 can be configured as a ring structure. Since the support portion 6 supports the diaphragm 3, the gas chamber 5 will be divided into an inner chamber and an outer chamber. During the degassing process, gas will be present in both the inner and outer chambers. Therefore, the outlet 26 should be connected to both the inner and outer chambers to ensure that the gas entering the inner and outer chambers can be discharged in a timely manner. Therefore, in this embodiment, as... Figure 8 As shown, the air outlet 26 is positioned directly opposite the support part 6, so that part of the air outlet 26 is connected to the inner cavity and part is connected to the outer cavity, thereby enabling the gas in the gas chamber 5 to be stably discharged from the air outlet 26.

[0073] Specifically, in order for air bubbles in the liquid to be removed more effectively, the liquid needs to have a sufficiently long flow path. In this embodiment, for example... Figure 5 as well as Figure 6 As shown, the liquid chamber 4 can be an arc-shaped cavity, with the inlet 11 and outlet 12 located at opposite ends of the arc-shaped cavity. Therefore, compared to straight cavities such as rectangular cavities, the flow path of the liquid from the inlet 11 to the outlet 12 is longer in the arc-shaped cavity. This longer flow path ensures sufficient time for the liquid to contact the diaphragm 3, allowing for better removal of air bubbles. Specifically, the first housing 1 has a first wall 14 that fits against the diaphragm 3. The first wall 14 has an arc-shaped groove 13, and the arc-shaped groove 13 and the diaphragm 3 together form the aforementioned arc-shaped cavity.

[0074] Furthermore, since the support part 6 supports the diaphragm 3 at the liquid cavity 4, if the contact area between the liquid cavity 4 and the diaphragm 3 is too different on the inner and outer sides of the support part 6, the difference in liquid pressure on the inner and outer sides of the diaphragm 3 will also be too large, which will cause the diaphragm 3 on one side to deform too much, and the life of the diaphragm 3 with excessive deformation will be shorter.

[0075] In this embodiment, as Figure 3 As shown, to ensure that the pressure of the liquid on the inner and outer diaphragms 3 of the support part 6 is as equal as possible, the support part 6 can be configured as follows.

[0076] Specifically, because the arc-shaped groove 13 has a central arc 131, and the distance between the central arc 131 and the inner and outer walls of the arc-shaped groove 13 is equal, and the plane perpendicular to the central axis of the first housing 1 is set as the second reference plane, the projection of the support part 6 on the orthogonal projection of the second reference plane covers the projection of the central arc 131 of the arc-shaped groove 13. This ensures that the difference in contact area between the liquid and the diaphragm 3 relative to the inner and outer sides of the support part 6 is not too large, preventing the support surface of the support part 6 from being too close to the inner or outer side of the liquid cavity 4, thus avoiding an excessive difference in liquid pressure on the diaphragm 3 on the inner and outer sides of the support part 6. Therefore, the above structure ensures the service life of the entire diaphragm 3. It should be noted that if the axis of the inlet 11 is parallel to the central axis of the first housing 1, then the first reference plane and the second reference plane are the same plane or parallel planes. If the central axis of the inlet 11 is not parallel to the central axis of the first housing 1, then the first reference plane and the second reference plane are different and not parallel. Preferably, the support portion 6 is arranged coaxially with the arc-shaped groove 13, so that the support portion 6 can cover the central arc 131 of the arc-shaped groove 13 from the liquid inlet 11 to the liquid outlet 12.

[0077] Furthermore, although the aforementioned support portion 6 covers the central arc 131 of the arc groove 13, the contact area between the liquid on the outer side of the support portion 6 and the diaphragm 3, which is divided by the central arc 131, is larger than the contact area between the liquid on the inner side of the support portion 6 and the diaphragm 3. As a result, the pressure on the diaphragm 3 is greater than the pressure on the inner diaphragm 3. In order to further reduce the pressure difference between the inner and outer diaphragms 3, the radial distance between the central arc 131 and the inner wall of the support portion 6 is made smaller than the radial distance between the central arc 131 and the outer wall of the support portion 6. This makes the centerline of the support portion 6 more biased towards the outer liquid cavity, thereby reducing the difference between the contact area between the liquid on the inner side of the support portion 6 and the contact area between the liquid on the outer side of the support portion 6 and the diaphragm 3. This further ensures that the liquid pressure on the diaphragm 3 is similar on both the inner and outer sides of the support portion 6.

[0078] Specifically, in order to further ensure the length of the flow path of the liquid in the arc-shaped groove 13 and the arc-shaped cavity, in this embodiment, as follows: Figure 6 As shown, the arc-shaped groove 13, projected onto the second reference plane, includes end portions 132 and a middle portion 133. The inner and outer sidewalls of the middle portion 133 are both arcs, and the centers of these arcs coincide with the central axis of the first housing 1. There are two end portions 132, located at opposite ends of the middle portion 133 and connected to each other. Correspondingly, the projections of the inlet 11 and outlet 12 are located within the projections of the two end portions 132. In terms of spatial structure, the inlet 11 and outlet 12... The outlet 12 is connected to the two ends 132 of the arc-shaped groove 13, and the middle part 133 of the arc-shaped groove 13, excluding the two ends, is arranged around the central axis of the first housing 1, thereby providing a reasonable and sufficiently long flow path for the liquid and ensuring the length of the liquid flow path; furthermore, the central angle of the inner wall of the middle part 133 is A, and A is greater than 240 degrees, so that the arc-shaped flow path of the arc-shaped groove 13 occupies more than two-thirds of the entire first housing 1 in the circumferential direction, further ensuring the length of the liquid flow path.

[0079] Specifically, refer to Figure 4 as well as Figure 8 The second housing 2 has a second wall 25 that fits against the diaphragm 3, so that the diaphragm 3 is pressed between the first wall 14 and the second wall 25. The second wall 25 is provided with an annular groove 21, and the support part 6 is disposed in the annular groove 21. The annular groove 21 and the diaphragm 3 form a gas cavity 5.

[0080] To ensure the proper flow path of the liquid within the liquid cavity 4 and prevent the path from becoming shorter, it is necessary to avoid the formation of a gap between the first wall 14 at the inner wall of the arc-shaped groove 13 and the diaphragm 3 (in this case, the formation of the gap is as follows). Figure 12(As shown), otherwise some liquid will flow through the gap, and the flow path of this liquid will be shortened, resulting in gas and bubbles in the liquid flowing out from the outlet 12 before they are removed.

[0081] The gap is formed because the diaphragm 3 deforms downwards under the pressure of the liquid, and part of the diaphragm 3 separates from the first wall 14, forming a gap. Therefore, in this embodiment, the inner walls of the annular groove 21 and the arc-shaped groove 13 are both arc-shaped walls, and the diameter of the inner wall of the annular groove 21 (i.e., Figure 4 The inner wall diameter of the gas cavity 5 and the diameter of the arc groove 13 (i.e., Figure 4 The inner wall diameter of the liquid cavity 4 is equal to or the inner wall diameter of the annular groove 21 is greater than the inner wall diameter of the arc groove 13, so that the second wall 25 at the inner wall of the annular groove 21 can fit tightly with the first wall 14 at the inner wall of the arc groove 13, avoiding the formation of gaps between the first wall 14 at the inner wall of the arc groove 13 and the diaphragm 3, thereby further ensuring the flow path of the liquid in the liquid cavity 4 and ensuring the defoaming effect of the liquid.

[0082] Specifically, the first housing 1 and the second housing 2 are fixed together by bolts. The first housing 1 has a mounting hole 16 along its central axis, and the second housing 2 has a threaded hole 24 along its central axis. The bolts are inserted into the mounting hole 16 and connected to the threaded hole 24, thereby connecting the first housing 1 and the second housing 2 together. Of course, a through hole is also required at the central axis of the corresponding diaphragm 3 for the bolts to pass through.

[0083] Specifically, refer to Figure 4 The diaphragm 3 includes an inner fixing part 31, a middle part, and an outer fixing part 32. The middle part of the diaphragm 3 and the arc-shaped groove 13 form a liquid cavity 4, and the middle part and the annular groove 21 form a gas cavity 5. The inner fixing part 31 and the outer fixing part 32 are located between the first wall 14 and the second wall 25, thereby fixing the diaphragm 3. In order to ensure the sealing of the liquid cavity 4 and the gas cavity 5, when the diaphragm 3 is pressed by the first wall 14 and the second wall 25, an inner sealing part and an outer sealing part are respectively provided on the inner side of the inner fixing part 31 and the outer side of the outer fixing part 32 of the diaphragm 3, so that both the inner and outer sides of the diaphragm 3 are sealed.

[0084] Specifically, such as Figure 3 , 5 as well as Figure 8As shown, the inner sealing part includes a first sealing ring 7. In this embodiment, an inner annular groove 22 is provided at the second wall 25 at the central axis of the second housing 2. The inner annular groove 22 surrounds the outside of the threaded hole 24, and the first sealing ring 7 is installed in the inner annular groove 22. Correspondingly, an inner annular sealing protrusion 17 is provided at the first wall 14 at the central axis of the first housing 1. The inner annular sealing protrusion 17 is located outside the mounting hole 16 and passes through the through hole provided at the center of the diaphragm 3 when the diaphragm 3 is installed, and abuts against the first sealing ring 7, thereby realizing the fixing and sealing connection at the inner fixing part 31 of the diaphragm 3. Of course, in another embodiment, the inner annular groove 22 can be provided on the first wall 14, and the inner annular sealing protrusion 17 can be provided on the second wall 25.

[0085] Specifically, such as Figure 3 as well as Figure 5 As shown, the outer sealing part includes an outer annular protrusion 15 and a second sealing ring 8. The outer annular protrusion 15 is fixedly disposed on the first housing 1 (specifically, the outer annular protrusion 15 can be integrally disposed on the first housing 1 or sealed and welded on the first housing 1) and surrounds the outside of the diaphragm 3. The end of the second housing 2 near the first housing 1 can be inserted into the inner side of the outer annular protrusion 15, so that the outer annular protrusion 15 surrounds the outside of the diaphragm 3.

[0086] An outer annular groove 23 is provided on the part of the second housing 2 located inside the outer annular protrusion 15. The second sealing ring 8 is installed in the outer annular groove 23. The sealing of the outer sealing part is achieved by the second sealing ring 8 abutting against the inner wall of the outer annular protrusion 15 and the outer annular groove 23, so as to prevent the outer fixing part 32 of the diaphragm 3 from contacting the external environment.

[0087] Example 2

[0088] The difference from Example 1 is that: Figure 9 As shown, the air outlet 26 is located in either the inner or outer cavity, i.e., it communicates with either the inner or outer cavity. Correspondingly, at least one connecting portion 61 is provided on the support portion 6. The connecting portion 61 connects the inner and outer cavities to form a single cavity, so the air outlet 26 communicates with the entire cavity to facilitate gas discharge. Of course, the connecting portion 61 can be a groove structure or a hole structure formed on the support portion 6. The connecting portion 61 can be located at one end of the support portion 6 near the diaphragm 3, or at the middle of the support portion 6, or at the end away from the diaphragm 3.

[0089] When the connecting part 61 is provided at one end of the support part 6 near the diaphragm 3, it is preferable that the multiple connecting parts 61 are arranged in a circular array around the central axis of the first housing 1.

[0090] Example 3

[0091] The difference from Embodiment 1 is that the support portion 6 is not a ring structure, such as... Figure 10 As shown in Figure 11, the support portion 6 may also be a multi-segment arc-shaped support portion 62, wherein the multi-segment arc-shaped support portions 62 are spaced apart, and the spacing direction referred to here may be radially and / or circumferentially spaced apart along the support portion 6.

[0092] like Figure 10 As shown, multiple arc-shaped support sections 62 are spaced apart circumferentially along the support section 6, so the inner diameter of the arc-shaped support sections 62 is the same, and adjacent arc-shaped support sections 62 are spaced apart circumferentially; or as... Figure 11 As shown, if multiple arc-shaped support sections 62 are arranged at intervals along the circumference and radial direction of the support section 6, the inner diameters of the multiple arc-shaped support sections 62 are different, and the intervals between the arc-shaped support sections 62 form a communication port, so that all parts of the entire gas chamber 5 are still connected.

[0093] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A defoamer, characterized in that, include: A first housing and a second housing, wherein the first housing and the second housing are connected; A diaphragm is pressed between the first housing and the second housing; A liquid cavity is formed between the diaphragm and the first housing; A gas chamber is formed between the diaphragm and the second housing. The diaphragm allows gas in the liquid chamber to pass through the diaphragm and enter the gas chamber, while the diaphragm prevents liquid in the liquid chamber from entering the gas chamber. A liquid inlet and a liquid outlet are provided on the first housing, and both the liquid inlet and the liquid outlet are connected to the liquid cavity; An air outlet is provided on the second housing, and the air outlet is connected to the gas chamber; The gas chamber is provided with a support portion, and the support portion can abut against the diaphragm to support the diaphragm; A plane perpendicular to the central axis of the inlet is designated as the first reference plane. On the orthographic projection of the first reference plane, the projection of the inlet and the projection of the support part are at least partially coincident.

2. The defoamer according to claim 1, characterized in that, The support part has a ring structure, and the gas chamber is divided into an inner cavity and an outer cavity by the support part; The air outlet includes portions located on the inner and outer sides of the support portion, with the inner portion directly communicating with the inner cavity and the outer portion directly communicating with the outer cavity; or, the air outlet is located only on the inner or outer side of the support portion, and the support portion is provided with a communicating portion that connects the inner cavity and the outer cavity.

3. The defoamer according to claim 1, characterized in that, The support portion includes at least two spaced-apart arc-shaped support portions.

4. The defoamer according to claim 1, characterized in that, The first housing has a first wall that fits against the diaphragm, and the first wall is provided with an arc-shaped groove, and the liquid cavity is formed between the arc-shaped groove and the diaphragm; The inlet and outlet are located at opposite ends of the arc-shaped groove and are connected to the arc-shaped groove.

5. The defoamer according to claim 4, characterized in that, The arc-shaped groove has a central arc, and the inner and outer walls of the arc-shaped groove are equidistant from the central arc. The plane perpendicular to the central axis of the first housing is set as the second reference plane. On the orthographic projection of the second reference plane, the projection of the support part covers the projection of the central arc.

6. The defoamer according to claim 5, characterized in that, The support part is a circular ring structure, and the radial distance between the central arc and the inner wall of the support part is less than the radial distance between the central arc and the outer wall of the support part.

7. The defoamer according to claim 5, characterized in that, On the orthographic projection of the second reference plane, the arc-shaped groove includes an end portion and a middle portion. Two ends are provided and are located at both ends of the middle portion. The inner and outer sidewalls of the middle portion are arcs, and the centers of the inner and outer sidewalls of the middle portion are both coincident with the central axis of the first housing. The projections of the liquid inlet and the liquid outlet are located within the projections of the two ends, and the central angle of the inner wall of the middle part is greater than 240 degrees.

8. The defoamer according to claim 2, characterized in that, The second housing has a second wall that fits against the diaphragm, and the second wall is provided with an annular groove, the gas cavity being formed between the annular groove and the diaphragm; Both the annular groove and the arc-shaped groove have circular arc walls, and the radius of the inner wall of the annular groove is equal to the radius of the inner wall of the arc-shaped groove, or the radius of the inner wall of the annular groove is greater than the radius of the inner wall of the arc-shaped groove.

9. The defoamer according to claim 8, characterized in that, The diaphragm has an inner fixing part and an outer fixing part on the inner side and the outer side of the gas chamber, respectively, and the inner fixing part and the outer fixing part are clamped and fixed between the first wall and the second wall. The first housing and the second housing have an inner sealing portion located inside the inner fixing portion, and the first housing and the second housing have an outer sealing portion located outside the outer fixing portion.

10. The defoamer according to claim 9, characterized in that, The inner sealing part includes a first sealing ring located inside the diaphragm, and the first sealing ring is sealed and pressed between the first housing and the second housing; The outer sealing part includes an outer annular protrusion and a second sealing ring. The outer annular protrusion is fixedly disposed on the first housing and surrounds the outside of the diaphragm. The second housing is partially located inside the outer annular protrusion. The second sealing ring seals the outer annular protrusion and the second housing.

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