• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention is directed to a filter cartridge for removing liquid from a gas stream, the filter cartridge (1) comprising the following: - a filter medium (4) held between two end caps (5), one of the end caps (5) ) comprises a gas inlet (6); - wherein the filter medium (4) is mounted in a rolled-up state; - an electrically conductive layer (11) provided on the filter medium (4); wherein the electrically conductive layer (11) is adhered to the filter medium (4) such that it is placed between two adjacent layers of filter medium (4); and the filter cartridge further comprises an electrical connector configured to connect the electrically conductive layer (11) to a ground.
    公开号:BE1025376B1
    申请号:E2017/5497
    申请日:2017-07-13
    公开日:2019-02-08
    发明作者:Wim Moens
    申请人:Atlas Copco Airpower Naamloze Vennootschap；
    IPC主号:
    专利说明:

    Filter cartridge for a compressor or vacuum pump.
    This invention relates to a filter cartridge for removing liquid from a gas stream, the filter cartridge comprising the following: a filter medium held between two end caps, one of the end caps comprising a gas inlet; wherein the filter medium is mounted in a rolled-up state such that the filter medium has a multi-layer structure; and an electrically conductive layer provided on the filter medium.
    It is known that filters comprising an electrically conductive layer are used in air filter units, such conductive layers being electrically charged, such that dust particles are filtered more efficiently. One example can be found in US 2009 / 241,777A, with MITSUBISHI CHEM CORP as the applicant.
    Although such a filter could improve the efficiency with which dust particles are retained, it would not be suitable for gas filtration in a compressor or vacuum pump because due to the harsh environment to which it is exposed, it would not be able to reduce the risk of sparks and even ignition in reduce the filter medium due to accumulation of static energy therein.
    One of the drawbacks of the filter identified above is the fact that an electric charge is maintained in the two electrically conductive layers by generating an electric field between them, which further facilitates a possible ignition of the filter medium.
    BE2017 / 5497
    Because of the typical volume and speed of the gas flowing through a compressor, such a situation could easily become dangerous, because even the smallest spark can cause a fire, which can even lead to an explosion.
    Yet another drawback of the filter identified above is the complex manufacturing method in which the filter layers are first glued or bonded together and then the carrier layers are treated and bonded to the structure. Such a manufacturing method is not only costly and time-consuming, but in view of the speed of compressed gas and its volume, such a filter structure cannot prove to be sufficiently strong and the filter can collapse.
    In view of the aforementioned disadvantages, it is an object of the present invention to provide a filter cartridge for removing fluid from a gas stream, the filter cartridge being suitable for use in a compressor or a vacuum pump.
    It is another object of the present invention to provide a filter cartridge that reduces or even eliminates the risk of sparks arising in the filter medium, while at the same time maintaining a very high efficiency of the filtering process.
    It is yet another object of the present invention to maintain a highly efficient discharge of possibly static electricity accumulated in some part of the filter medium.
    BE2017 / 5497
    It is another object of the present invention to provide a very easy to manufacture and robust filter cartridge.
    The present invention solves at least one of the above and / or other problems by providing a filter cartridge for removing liquid from a gas stream, the filter cartridge comprising the following:
    - a filter medium held between two end caps, one of the end caps comprising a gas inlet; wherein the filter medium is mounted in a rolled-up state such that the filter medium has a multi-layer structure;an electrically conductive layer provided on the filter medium;
    the electrically conductive layer being adhered to the filter medium such that it is disposed between two adjacent layers of filter medium; and the filter cartridge further comprises an electrical connection means configured to connect the electrically conductive layer to a ground.
    Because the electrically conductive layer is adhered to the filter medium and because the filter medium is mounted in a rolled-up state, a very robust filter cartridge is obtained by means of a very easy mounting technique.
    By bonding the electrically conductive layer to the filter medium, such that it is between two adjacent layers of
    BE2017 / 5497 filter medium is placed, the static energy possibly accumulated in the filter medium is efficiently guided to earth, regardless of the depth where such static energy is accumulated.
    Tests have shown that a simple grounding of the filter cartridge without incorporating the electrically conductive layer is not sufficient to reduce the risk of sparks occurring in the filter medium, but because both characteristics are used in the filter cartridge according to the present invention. know such an earthing and the incorporation of the electrically conductive layer, possible accumulation of static energy in the filter medium is immediately discharged and sparks can no longer occur.
    Furthermore, since the electrically conductive layer is adhered to the filter medium such that it is interposed between two adjacent layers of filter medium, a stronger and more durable filter cartridge is achieved which is suitable for applications requiring very high pressures. Because the durability of the filter cartridge is increased, the maintenance costs are reduced because a filter cartridge according to the present invention would require a less frequent maintenance.
    The present invention is further directed to a filter comprising a housing defining an internal space in which a filter cartridge is received, the filter cartridge comprising:
    BE2017 / 5497 a filter medium that is held between two end caps, one of the end caps comprising a gas inlet;
    wherein the filter medium is mounted in a rolled-up state such that the filter medium has a multi-layer structure;
    an electrically conductive layer provided on the filter medium;
    - wherein the housing further comprises a gas outlet in the internal space between the cartridge and a wall of the housing, the gas outlet being in fluid communication with the gas inlet;
    the electrically conductive layer being adhered to the filter medium such that it is disposed between two adjacent layers of filter medium; and the filter cartridge further comprises an electrical connection means configured to connect the electrically conductive layer to a ground.
    The present invention is further directed to a method for manufacturing a filter cartridge, the method comprising the following steps:
    - providing a low filter medium;
    - applying a conductive layer to at least a part of the surface of the filter medium;
    the method further comprising the following steps:
    - rolling up the filter medium and attaching the rolled-up filter medium between two end caps,
    BE2017 / 5497 such that the electrically conductive layer is placed between two adjacent layers of filter medium; and
    - providing an electrical connection means that connects the electrically conductive layer to an earth.
    In the context of the present invention, it is to be understood that the advantages given above with regard to the filter cartridge also apply to the filter and also to the method for manufacturing a filter cartridge.
    The present invention is also directed to the use of a gas filter according to the present invention for filtering oil from compressed air in an oil-injected compressor system.
    With the insight to better illustrate the features of the invention, some preferred embodiments of the present invention are described below as examples, without being limiting in any way, with reference to the accompanying drawings, in which:
    Figure 1 schematically shows a compressed air system according to an embodiment of the present invention;
    Figure 2 schematically shows a filter cartridge according to an embodiment of the present invention;
    Figure 3 schematically shows a cross-section through a filter housing, which comprises a filter cartridge according to an embodiment of the present invention;
    BE2017 / 5497
    Figure 4 schematically shows the mounting of the electrically conductive layer on the filter medium according to an embodiment of the present invention;
    Figures 5 to 9 schematically show the mounting of the electrically conductive layer on the filter medium according to other embodiments of the present invention.
    Figure 1 shows a filter cartridge 1 according to the present invention, wherein the filter cartridge 1 is mounted on a flow line between a compressor and a user network 3.
    If such a filter cartridge 1 were mounted in a vacuum pump, the filter cartridge 1 would typically be mounted on a flow line between the vacuum pump and the atmosphere.
    Accordingly, the filter cartridge 1 is preferably mounted on the outlet flow line of a compressor or vacuum pump 2, such that the compressed air is first filtered and only then is passed to the user network 3 or evacuated to the atmosphere.
    As shown in Figure 2, the filter cartridge 1 comprises a filter medium 4 which is retained between two end caps 5. The two end caps 5 have the property that they hold the filter medium 4 in a desired position.
    As can be seen in Figure 3, one of the two end caps 5a or 5b preferably comprises a gas inlet 6, the
    BE2017 / 5497 gas inlet 6 receives the gas flow coming from the compressor or vacuum pump 2.
    In Figure 3 it can be seen that the selected end cap comprising the gas inlet 6 is 5a, but in the context of the present invention it should be clear that the filter cartridge 1 can also be rotated, in which case end cap 5b will be the gas inlet 6 include.
    Furthermore, it is possible to design the gas inlet 6 through the end cap 5b of the layout shown in Figure 3.
    The filter cartridge 1 is typically received in a housing 8, which defines an internal space 7, the housing further comprising a gas outlet 9.
    The gas outlet 9 is preferably located in the internal space 7 between the cartridge 1 and a wall of the housing 8, the gas inlet 6 being in fluid communication with the gas outlet 9.
    In the context of the present invention, a filter 10 is to be understood to mean the housing 8 comprising the filter cartridge 1, a gas inlet 6 and a gas outlet 9, as shown in Figure 3.
    The gas outlet 9 can be on the level of one of the end caps 5 or can even be on the housing 8.
    For more efficient filtering, the gas outlet 9 is preferably, but not limited to, in the upper section or relatively close to the upper section of
    BE2017 / 5497 the filter 10 has been designed. Such an upper section is understood to mean the opposite of the orientation of the gravitational force when such a filter 10 is mounted in a compressor or vacuum pump 2 and under normal operating conditions.
    The gas outlet 9 can be connected through a flow line to the user network 3 or to the atmosphere, depending on whether the filter cartridge 1 is mounted in a compressor or a vacuum pump.
    Furthermore, the housing 8 typically comprises an opening that is closed by the end cap 5a or 5b that includes the gas inlet 6.
    Accordingly, gas flowing from a compressor or vacuum pump is passed through the gas inlet
    9, passed through the filter medium 4 and further through the gas outlet.
    Consequently, only clean filtered gas reaches the user network 3 or the atmosphere and any liquid or possibly solid impurities are retained in the filter cartridge 1.
    Preferably, the filter medium 4 is mounted in a rolled-up state, as shown in Figure 4. By applying such a technique, the filter cartridge 1 according to the present invention has a multi-layer structure when mounted and retained in the two end caps 5, whereby the efficiency of the filtration process is increased.
    In the context of the present invention, the term "rolled up" is understood to mean bringing a ratio
    BE2017 / 5497 rectangular or square piece of filter medium 4 in a relatively cylindrical structure with a layer of filter medium 4 on top of another layer of filter medium 4.
    Such a relatively cylindrical structure is created by taking a first edge of the relatively rectangular or square piece of filter medium 4, bringing it into contact with a portion of the filter medium 4 that is at a minimum distance from the first edge, whereby a relatively cylindrical hollow shape arises and furthermore the resulting cylindrical hollow shape
    to the edge the side opposite the first edge to push until this one edge in contact comes with a low from the proportionately cylindrical form. Furthermore a electrically conductive layer 11 on it filter medium 4 provided, preferably when it
    filter medium 4 is in a non-rolled state. When the filter medium 4 is rolled up, the electrically conductive layer 11 is consequently placed between the two adjacent layers of filter medium.
    In the context of the present invention, it should be understood that the filter medium 4 has two surfaces: a bottom surface and a top surface. Furthermore, the conductive layer 11 can be adhered either to the upper surface as shown in Figures 4 to 9 or to the lower surface (not shown).
    The electrically conductive layer 11 has the property that it captures any static energy that might accumulate in the filter medium, such
    BE2017 / 5497 static energy is developed by the friction between the gas flow and the filter medium 4.
    To reduce or even eliminate the risk of sparks arising from such static energy, the filter cartridge 1 further comprises an electrical connection means (not shown) configured to connect the electrically conductive layer 11 to a ground.
    In the context of the present invention, a grounding is to be understood to mean an electrical point of zero volts or approximately zero volts through which an electrical charge can be discharged. This can be a direct physical connection to the safety grounding system.
    In an embodiment according to the present invention, the electrically conductive layer 11 is in contact with one of the end caps 5a or 5b.
    For a simple layout, the electrical connection means is in direct contact with the end cap 5a or 5b which is in contact with the electrically conductive layer 11.
    The electrical connection means is formed by one of the two end caps 5a or 5b by physically bringing the electrically conductive layer 11 into contact with one of the two end caps 5a or 5b or by using an electrically conductive wire which connects the electrically conductive layer 11 and connect one of the two end caps 5a or 5b and further connect the end cap 5a or 5b to the ground.
    The end cap 5a or 5b to which the electrically conductive layer 11 is connected is preferably made of a material that
    BE2017 / 5497 makes it possible for an electric current to flow therethrough.
    Another possibility for establishing the electrical connection is the introduction of an electrically conductive wire through one of the two end caps 5a or 5b, the electrically conductive wire being brought into direct contact with the electrically conductive layer 11 at one end and is further connected to the ground at the other end.
    Yet another possibility is to bond an electrically conductive wire to the electrically conductive layer 11, the electrically conductive wire being guided further, along its contour and preferably as far as the outer surface of the filter cartridge 1, to the end cap 5, where the connection to grounding can be achieved.
    The electrical connection means can also be realized by introducing an electrically conductive wire through the filter medium 4, the electrically conductive wire being directly physically brought into contact with the electrically conductive layer 11 and with the grounding.
    The electrically conductive layer 11 is preferably gas permeable.
    The two end caps 5 can be made of a material selected from the group comprising: any type of metal or plastic, ceramic, rubber, carbon, glass or any other type of material.
    BE2017 / 5497
    In an embodiment according to the present invention, the two end caps 5 are in the form of a radial confinement in which the rolled-up filter medium 4 is received. Furthermore, the radial confinement may comprise a collar type structure covering a minimum height, H1, of the filter medium 4 for attaching the filter medium 4 therein, as shown in Figure 3. The structure of the collar type is preferably formed at the level of both end caps 5a and 5b.
    Alternatively, the radial confinement may comprise means for securing the filter medium 4 by means of, for example, pressure closure, by hooking or by using an adhesive, or another fastening technique.
    The filter medium 4 is preferably, but not limited to, cellulose-based. Alternatively, the filter medium 4 can be selected from the group consisting of textile fibers, fiberglass, polycarbonate, geotextile fabrics, polyester mesh, bonded fibers or filaments, metal mesh, any type of microporous membrane or other type of material in a woven, non-woven, knitted, pressed or foamed state.
    The material from which the electrically conductive layer 11 is made can preferably be selected from the group comprising copper, aluminum, iron, steel, silver, gold, platinum, brass, bronze, graphite or another material that allows good electrical conductivity .
    Depending on the type of gas to which the filter cartridge 1 is exposed, the electrically conductive layer 11 may further comprise a protective coating such that it
    BE2017 / 5497 can withstand any corrosive effects that may occur due to the chemical composition and / or typical temperatures of the gas.
    The multi-layer filter medium 4 preferably comprises, but is not limited to, an electrically conductive layer 11 between any two successive layers of filter medium 4, when the filter medium 4 is in a rolled-up state.
    Because such a filter cartridge 1 is preferably mounted in a compressor or vacuum pump 2, the gas flow entering through the gas inlet 6 is typically contaminated with liquid particles. Accordingly, such a gas flow may comprise a mixture of gas and oil, it may further comprise condensate and even small particulate material. Because of the porosities of the filter medium 4, only clean gas is given the opportunity to leave the gas outlet 9, the liquid and possibly the particulate material being retained by the filter medium 4.
    In another embodiment of the present invention, the filter 10 may include a nozzle or a valve (not shown) that is preferably placed on the housing 8 at the lower section or relatively close to the lower section of the housing 8. Such a lower section is to be understood to mean the opposite of the upper section when such a filter is mounted in a compressor or vacuum pump 2 and under normal operating conditions.
    The nozzle or valve is used for draining the liquid dripping from the filter medium 4, wherein
    BE2017 / 5497 such liquid is optionally filtered and recycled to the compressor or vacuum pump 1 for sealing any gas leaks in the compressor or vacuum element or for lubricating any bearings that the compressor or vacuum pump comprises.
    In the context of the present invention, the compressor or vacuum pump 2 is to be understood to mean the complete compressor or vacuum pump system, including the compressor or vacuum element, all typical connecting pipes and valves, the compressor unit or the vacuum pump housing and optionally the motor which compressor or vacuum element.
    In the context of the present invention, compressor or vacuum element is to be understood to mean the envelope of the compressor or vacuum element in which the compression or vacuum process takes place by means of a rotor or by reciprocating movement.
    In an embodiment according to the present invention, the electrically conductive layer 11 can be in the form of pads as shown in Figures 5 and 6, which are arranged or stretched on the surface of the filter medium 4 at a certain distance from each other. Such a distance is preferably chosen such that the efficiency of the discharge properties thereof does not suffer.
    The pads are preferably, but not limited to, mounted on the filter media 4 in such a way that when the filter media 4 is in a rolled-up state, a patch of electrically conductive layer 11 would cover a portion of the filter media such that is not covered or
    BE2017 / 5497 is partially covered by another patch of electrically conductive layer 11 of a subsequent neighboring layer. By choosing such a mounting technique, a good discharge of the static energy is ensured.
    The pads can be mounted by gluing or pressing
    be or the electric conductive layer 11 can a uneven or scratched surface to have, what the electrically conductive layer 11 gives the opportunity On it filter medium 4. The electrically conductive low 11
    at least a part of the surface of the filter medium 4 when the filter medium 4 is in a non-rolled state, such as for example more than 50% of the surface, more than 60% of the surface or more than 80% of the surface.
    For an increased discharge capacity and for easy mounting, the electrically conductive layer 11 is preferably, but not limited to, mounted on approximately the entire surface of the filter medium 4 when the filter medium 4 is in a non-rolled state.
    It is self-evident that in a rolled-up state, the filter medium 4 and the electrically conductive layer 11 define a spiral-type surface, the center of the coil being a hollow cylindrical space for allowing the gas to flow through the gas inlet 6 so that it forms a part of the height, H, of the filter cartridge 1.
    In one embodiment of the present invention, the electrically conductive layer 11 is in the form of a woven net
    BE2017 / 5497 of electrically conductive wires, as shown in Figures 4, 5 and 6. The woven net is a continuously woven net, as shown in Figure 4, or is in the form of rags as shown in Figures 5 and 6.
    The present invention is not limited to such embodiments, and other shapes or weaving techniques with which the same effect can be achieved are to be considered as falling within the present invention.
    The density of the electrically conductive wires that form the woven net is preferably chosen such that a liquid droplet in the filter medium at a place where the electrically conductive layer 11 is mounted comes into contact with at least one electrically conductive wire.
    In another embodiment of the present invention, the density of the electrically conductive wires forming the woven net can be selected such that an aperture formed by adjacent electrically conductive wires is approximately equal to or smaller than the typical diameter of a liquid droplet.
    In the context of the present invention, the typical diameter of a droplet is to be understood to mean a diameter in the range of about 1 micron to about 300 micron, which depends on the viscosity of the liquid. Tests have shown that the typical diameter of a droplet to be found in a filter cartridge 1 mounted in a compressor or vacuum pump 2 is about 1 micron.
    BE2017 / 5497
    Alternatively, the electrically conductive layer 11 may be in the form of electrically conductive wires oriented in different directions.
    For a of such layout is going to be the density from the electrically conductive wires on the same manner and with same considerations as above in front of it case from it
    woven net called chosen.
    The woven net of electrically conductive wires and / or the electrically conductive wires that are oriented in different directions may further optionally comprise a glue or a binder which is applied on at least one side or surface, in order to complete the assembly procedure. filter medium 4. Alternatively, at least one surface of the electrically conductive threads forming the woven net or of the electrically conductive threads oriented in different directions is adapted to adhere to the filter medium 4.
    In another embodiment of the present invention, the electrically conductive layer 11 comprises electrically conductive particles that have been sprayed to form an electrically conductive coating on the filter medium 4, as shown in Figures 7, 8 and 9. The electrically conductive layer is applied as a continuous coating surface that covers approximately the entire surface of the filter medium 4 when the filter medium is in a non-rolled state as shown in Figure 7, or covers part of the surface of the filter medium 4 and is applied to rags, as shown in Figures 8 and 9.
    BE2017 / 5497
    In the context of the present invention, it is to be understood that the pads may have a different shape or size than the examples shown in the accompanying drawings, and the present invention is not limited by these illustrative embodiments.
    Furthermore, the pads can be applied to the filter medium 4 in such a way that when the filter medium 4 is in a rolled-up state, a sheet of electrically conductive layer 11 would cover a part of the filter medium 4 that is not covered or partially covered. by another patch of electrically conductive layer 11 of an adjacent layer.
    For an easy fixation of such electrically conductive particles, the electrically conductive coating comprises an adhesive component to cause the electrically conductive particles to adhere to the filter medium 4. By applying such a technique, a very easy and efficient manufacturing method is applied.
    The density of the electrically conductive particles of the electrically conductive coating is preferably chosen such that a liquid droplet preferably comes into contact with two particles.
    Furthermore, the adhesive component is preferably an electrically conductive component.
    Furthermore, not only the filter cartridge 1 according to the present invention is very effective and robust, but also the method for manufacturing such
    BE2017 / 5497 filter cartridge 1 very easy. Accordingly, a layer of filter medium 4 is provided on the surface of which a conductive layer 11 is applied.
    The structure comprising the filter medium 4 and the conductive layer 11 is rolled up, creating a relatively cylindrical shape with the hollow center.
    Consequently, the electrically conductive layer 11 throughout the rolled up structure is preferably placed between two adjacent layers of filter medium 4.
    Furthermore, the resulting cylindrical shape is attached between two end caps 5 and an electrical connection means is provided for connecting the electrically conductive layer 11 to a ground.
    The step of providing the electrical connection means preferably includes, but is not limited to, the step of attaching the electrical connection means after performing the step of rolling up the filter medium 4.
    In an embodiment according to the present invention, the method comprises the step of attaching the electrical connection means to one of the two end caps 5a or 5b.
    Alternatively, the method comprises the step of bonding the electrical connection means directly to the electrically conductive layer 11 and further to grounding by means of, for example, an electrically conductive layer that is positioned as defined above in the present application.
    BE2017 / 5497
    In an embodiment according to the present invention, the step of applying the electrically conductive layer 11 to at least a part of the surface of the filter medium 4 depends on the preferred support material used for the electrically conductive layer 11, the sub-step selected from the group comprising: bonding a woven net of electrically conductive wires to the entire surface or approximately the entire surface of the filter medium 4, bonding electrically conductive wires oriented in different directions to the entire surface or approximately the entire surface of the filter medium filter medium 4 or spraying electrically conductive particles and forming an electrically conductive coating on the entire surface or approximately the entire surface of the filter medium 4.
    In the context of the present invention, the step of attaching the rolled-up filter medium 4 between the two end caps 5 is to be understood to mean bonding the two end caps 5 by a technique selected from the group comprising: gluing, pressure closure, pressing of the two end caps on the filter medium 4 or adhesion thereof by means of hooks, fasteners or clamps or another technique.
    The present invention is further directed to the use of a filter cartridge 1 for filtering oil from the compressed air in an oil-injected compressor system.
    The present invention is in no way limited to the embodiments described as examples and shown in the drawings, because such a filter cartridge 1
    BE2017 / 5497 all types of variants can be realized without departing from the scope of the invention.
    权利要求:
    Claims (24)
    [1]
    Conclusions.
    A filter cartridge for removing fluid from a gas stream, the filter cartridge (1) comprising:
    - a filter medium (4) held between two end caps 5, one of the end caps (5a, 5b) comprising a gas inlet (6);
    - wherein the filter medium (4) is mounted in a rolled up condition, such that the filter medium (4) has a multi-layer structure;
    - an electrically conductive layer (11) applied to the filter medium (4);
    characterized in that the electrically conductive layer (11) is attached to the filter medium (4) such that it is placed between two adjacent layers of filter medium (4); and the filter cartridge (1) further comprises an electrical connection means configured to connect the electrically conductive layer (11) to a ground.
    [2]
    Filter cartridge according to claim 1, characterized in that the filter medium (4) is based on cellulose.
    [3]
    Filter cartridge according to claim 1 or 2, characterized in that the electrically conductive layer (11) is in contact with one of the end caps (5a, 5b).
    [4]
    Filter cartridge according to claim 3, characterized in that the electrical connection means is in direct contact
    BE2017 / 5497 stands with the end cap (5a, 5b) in contact with the electrically conductive layer (11).
    [5]
    Filter cartridge according to one of the preceding claims, characterized in that the electrically conductive layer (11) covers at least a part of the surface of the filter medium (4) when the filter medium (4) is in a non-rolled state.
    [6]
    Filter cartridge according to one of the preceding claims, characterized in that the electrically conductive layer 11 is gas permeable.
    [7]
    Filter cartridge according to one of the preceding claims, characterized in that the multi-layer filter medium (4) comprises an electrically conductive layer (11) between each two successive layers of filter medium (4) when the filter medium (4) is in a rolled-up state.
    [8]
    Filter cartridge according to one of the preceding claims, characterized in that the electrically conductive layer (11) is mounted on the entire surface or approximately the entire surface of the filter medium (4) when the filter medium (4) is in a non-rolled state is located.
    [9]
    Filter cartridge according to one of the preceding claims, characterized in that the electrically conductive layer (11) comprises a woven network of electrically conductive wires.
    [10]
    Filter cartridge according to one of the preceding claims, characterized in that the electrically conductive layer
    BE2017 / 5497 (11) comprises electrically conductive wires which are oriented in different directions.
    [11]
    Filter cartridge according to one of the preceding claims, characterized in that the electrically conductive layer (11) comprises electrically conductive particles, which are sprayed, which forms an electrically conductive coating on the filter medium.
    [12]
    The filter cartridge according to claim 11, characterized in that the electrically conductive coating comprises an adhesive component for causing the electrically conductive particles to adhere to the filter medium (4).
    [13]
    Filter cartridge according to one of the preceding claims, characterized in that the two end caps (5) are in the form of a radial confinement in which the rolled-up filter medium (4) is received.
    [14]
    A filter comprising a housing (8) defining an internal space (7) in which a filter cartridge (1) is received,
    - wherein the filter cartridge (1) comprises the following:
    · A filter medium (4) held between two end caps (5), one of the end caps (5a, 5b) comprising a gas inlet (6);
    · Wherein the filter medium (4) is mounted in a rolled-up state such that the filter medium (4) has a multi-layer structure;
    · An electrically conductive layer (11) provided on the filter medium (4);
    BE2017 / 5497
    - wherein the housing (8) further comprises a gas outlet (9) in the inner space (7), between the cartridge (1) and a wall of the housing (8), the gas inlet (6) being in fluid communication with the gas outlet (9);
    characterized in that the electrically conductive layer (11) is adhered to the filter medium (4) such that it is placed between two adjacent layers of filter medium (4); and the filter cartridge (1) further comprises an electrical connection means configured to connect the electrically conductive layer (11) to a ground.
    [15]
    The filter according to claim 14, characterized in that the conductive layer (11) is in contact with one of the end caps (5a, 5b).
    [16]
    The filter according to claim 15, characterized in that the electrical connection means is in direct contact with the end cap (5a, 5b) which is in contact with the electrically conductive layer (11).
    [17]
    The filter according to any of claims 14 to 16, characterized in that the multi-layer filter medium (4) comprises an electrically conductive layer (11) between each two successive layers of filter medium (4) when the filter medium (4) is in a rolled-up state.
    [18]
    The filter according to any of claims 14 to 17, characterized in that the electrically conductive layer (11) is mounted on the entire surface or approximately the entire surface of the filter medium (4) when the
    BE2017 / 5497 filter medium (4) is in a non-rolled state.
    [19]
    A method of manufacturing a filter cartridge (1), the method comprising the following steps:
    it provided with a low filter medium (4); it apply from a conductive layer (11) at ten at least a part from it surface of it filter medium
    (4);
    characterized in that the method further comprises the following steps:
    rolling up the filter medium (4) and attaching the rolled-up filter medium (4) between two end caps (5), such that the electrically conductive layer (11) is placed between two adjacent layers of filter medium (4); and providing an electrical connection means that connects the electrically conductive layer (11) to a ground.
    [20]
    A method according to claim 19, characterized in that providing an electrical connection means comprises the step of attaching the electrical connection means after performing the step of rolling up the filter medium (4).
    [21]
    A method according to claim 19 or 20, characterized in that providing an electrical connection means bonding the electrical
    BE2017 / 5497
    28 comprises connecting means on one of the two end caps (5a, 5b).
    [22]
    Method according to one of claims 19 to 21, characterized in that the application of the electrically conductive layer (11) to at least a part of the surface of the filter medium (4) comprises the sub-step selected from the group comprising: bonding a woven net of electrically conductive wires to the entire surface or approximately the entire surface of the filter medium (4), bonding electrically conductive wires oriented in different directions to the entire surface or about the entire surface of the filter medium ( 4) or spraying electrically conductive particles and forming an electrically conductive coating on the entire surface or approximately the entire surface of the filter medium (4).
    [23]
    The method according to any of claims 19 to 22, characterized in that attaching the rolled-up filter medium (4) between two end caps (5) comprises bonding the two end caps (5) to the rolled-up filter medium (4) by means of a substep selected from the group comprising: gluing, pressure closure, pressing of the two end caps on the filter medium (4) or adhesion by means of hooks, fasteners or clamps.
    [24]
    Use of a filter cartridge (1) according to claims 1 to 12 for filtering oil from compressed air in an oil-injected compressor system.
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    同族专利:
    公开号 | 公开日
    EP3525912A1|2019-08-21|
    CN210114921U|2020-02-28|
    BE1025376A1|2019-02-01|
    DE202017007027U1|2019-04-03|
    AT16693U1|2020-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3933643A|1971-09-10|1976-01-20|The Carborundum Company|Electrically conducting filter media for fluids|
    DE3918342C1|1989-06-06|1990-06-07|Knecht Filterwerke Gmbh, 7000 Stuttgart, De|
    EP1569735A1|2002-07-20|2005-09-07|Mann+Hummel Gmbh|Separator for purifying a fluid flow|
    US20100205798A1|2007-05-23|2010-08-19|Brian Walker|Filter unit|
    US20100314333A1|2009-06-10|2010-12-16|Hollingsworth & Vose Company|Flutable fiber webs with low surface electrical resistivity for filtration|
    US8182682B1|2011-02-25|2012-05-22|Pall Corporation|Fluid treatment elements and assemblies|
    US4902427A|1988-04-25|1990-02-20|Ebonex Corporation|Filter for removing heavy metals from drinking water|
    FR2726483B1|1994-11-09|1997-01-24|Siebec Sa|FILTER CARTRIDGE WITH MOBILE CROWN HOLDING|
    FI119280B|2006-05-18|2008-09-30|Valtion Teknillinen|Filter and new methods|
    法律状态:
    2019-03-06| FG| Patent granted|Effective date: 20190208 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201662406983P| true| 2016-10-12|2016-10-12|
    US62406983|2016-10-12|CN201790001234.5U| CN210114921U|2016-10-12|2017-10-05|Filter cartridge and filter|
    EP17780902.7A| EP3525912A1|2016-10-12|2017-10-05|A filter cartridge for a compressor or vacuum pump|
    DE202017007027.8U| DE202017007027U1|2016-10-12|2017-10-05|Filter cartridge for a compressor or a vacuum pump|
    PCT/IB2017/056152| WO2018069796A1|2016-10-12|2017-10-05|A filter cartridge for a compressor or vacuum pump|
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