CN117771781A - Filter device and negative pressure suction pump assembly - Google Patents

Abstract

The invention relates to a filter device and a negative pressure suction pump assembly, the filter device is provided with an inlet and an outlet, the filter device comprises a shell assembly and a filter element, the filter element is arranged in a cavity and divides the cavity into a first cavity and a second cavity, the inlet is communicated with the first cavity, the outlet is communicated with the second cavity, wherein the filter element comprises: a filtering part; and the drainage part is arranged on the side wall of the filtering part and penetrates through the side wall of the filtering part, the drainage part is provided with a drainage groove communicated with the first cavity, and the inlet is positioned on one side of the drainage part and is communicated with the first cavity through the drainage groove. The filtering device can improve the blood flow entering the filtering piece and improve the filtering rate and efficiency.

Description

Filter device and negative pressure suction pump assembly

Technical Field

The invention relates to the technical field of medical equipment, in particular to a filtering device and a negative pressure suction pump assembly.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

Peristaltic pumps are commonly used as a negative pressure source in medical equipment, the peristaltic pump is provided with a rotor, rollers rotating with the rotor are arranged on the rotor, and pumping fluid is realized by alternately squeezing and releasing a hose through the rollers. However, if plaque in blood enters the peristaltic pump, the peristaltic pump is blocked, so that a filter device needs to be arranged in the pipeline to filter the plaque in blood. In the existing filtering device, when the amount of filtered blood is large, thrombus accumulation is easy to occur when the blood carrying plugs such as thrombus and plaque enters the filtering piece at the inlet, so that the blood at the inlet is not easy to enter the filtering piece, and the filtering rate and the filtering efficiency are affected.

Disclosure of Invention

The invention aims to at least solve the problems of low filtration rate and low efficiency of a filtration device. The aim is achieved by the following technical scheme:

according to a first aspect of the present invention, there is provided a filter device provided with an inlet and an outlet, the filter device comprising a housing assembly having a cavity therein and a filter member provided in the cavity and dividing the cavity into a first cavity and a second cavity, the inlet communicating with the first cavity and the outlet communicating with the second cavity, wherein the filter member comprises:

a filtering part;

the drainage part is arranged on the side wall of the filtering part and penetrates through the side wall of the filtering part, the drainage part is provided with a drainage groove communicated with the first cavity, and the inlet is positioned on one side of the drainage part and is communicated with the first cavity through the drainage groove.

According to the filtering device, the drainage part is arranged on the filtering piece and penetrates through the side wall of the filtering part, and the drainage part is provided with the drainage groove communicated with the first cavity, so that blood carrying plugs such as thrombus and plaque can smoothly enter the filtering piece at the inlet under the drainage of the drainage part, the blood flow entering the filtering part is improved, and the filtering rate and the filtering efficiency are improved.

In addition, the filtering device according to the invention may have the following additional technical features:

in some embodiments of the present invention, the top of the drainage groove is in an open state, and/or the bottom of the drainage groove is level with the bottom of the filtering part.

In some embodiments of the invention, the housing assembly is provided with an input channel, the input channel being in communication with the first cavity, the inlet being formed at an end of the input channel in communication with the first cavity, the other end of the input channel being in communication with the exterior of the housing assembly.

In some embodiments of the invention, at least one end of the input channel includes a flare that communicates with the inlet.

In some embodiments of the invention, the outlet is located at the bottom of the second cavity.

In some embodiments of the invention, the housing assembly comprises: the lower shell is provided with a containing cavity with one end open, and the filter element is arranged in the containing cavity; and the upper shell is detachably connected with the lower shell and covers the opening.

In some embodiments of the invention, the filter part comprises a net-shaped member, the filter part is bowl-shaped and the bowl opening is arranged towards the upper shell, and the inner side wall of the filter part at least partially comprises an arc-shaped structure or a wave-shaped structure.

In some embodiments of the present invention, the filter element further includes a connection portion, which is disposed around an edge of the filter portion, and a circumferential edge of the connection portion abuts against an inner wall of the accommodating cavity; along the axial direction of the accommodating cavity, the inner wall of the accommodating cavity is provided with a step structure, the step structure comprises a first step and a second step, and a step surface is formed between the first step and the second step; the upper shell is provided with a boss protruding towards the accommodating cavity, and the upper end and the lower end of the connecting part are respectively in butt fit with the step surface and the boss.

In some embodiments of the present invention, the second step is disposed near the bottom of the accommodating cavity, and is provided with a limiting groove, the limiting groove forms an opening for inserting the drainage portion on a side facing the upper shell, and an outer contour of the drainage portion abuts against an inner wall of the limiting groove.

In some embodiments of the present invention, the upper case is provided with a first clamping portion, the lower case is provided with a second clamping portion, and the upper case is in clamping connection with the lower case through the first clamping portion and the second clamping portion.

In some embodiments of the present invention, one of the first clamping portion and the second clamping portion is a bump, the other is a clamping groove, a groove is provided on the bump, a first stop block and/or a second stop block are provided in the clamping groove at intervals, when the bump enters the clamping groove, one end of the bump abuts against one end of the first stop block after passing through the surface of the second stop block, and at the moment, the second stop block is clamped in the groove.

According to a second aspect of the present invention, there is also provided a negative pressure suction pump assembly, characterized in that the negative pressure suction pump assembly includes: a negative pressure pump; the filtering device described in the first aspect; a first conduit in communication with an inlet of the filter device; and the outlet of the filtering device is communicated with the negative pressure pump through the second pipeline.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically shows a schematic structure of a filtering apparatus of an embodiment;

FIG. 2 schematically illustrates an exploded view of a filter device of an embodiment;

FIG. 3 schematically illustrates a schematic structure of a filtering device in a top view of an embodiment;

FIG. 4 schematically shows a schematic cross-sectional view of section A-A of FIG. 3;

FIG. 5 schematically illustrates a structural schematic of the lower case of an embodiment;

FIG. 6 schematically illustrates a schematic structural view of a filter member of an embodiment;

FIG. 7 schematically illustrates a cross-sectional view of part A-A in another embodiment;

FIG. 8 schematically shows a cross-sectional view of part A-A of a further embodiment.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

The "axial direction of the filter means" means a direction connecting a center of the upper case and a center of the lower case, and may be understood as a thickness direction or a height direction of the filter. The axial direction of the elements contained in the filter device is parallel to the "axial direction of the filter device".

The embodiment of the invention provides a filtering device which is used for filtering plaque in blood and preventing the plaque from flowing into a negative pressure pump to cause blockage of the negative pressure pump.

As shown in fig. 1-2, the filter apparatus 100 includes a housing assembly 10 and a filter element 20.

Referring to fig. 3 and 4, the housing assembly 10 has a closed cavity therein, and the housing assembly 10 is provided with an inlet 101 and an outlet 102 communicating with the cavity, the filter member 20 is provided in the cavity and isolates the inlet 101 from the outlet 102, and blood enters the cavity through the inlet 101 and flows out of the outlet 102 after being filtered by the filter member 20. In detail, the filter 20 divides the cavity into a first cavity 131 and a second cavity 132, the inlet 101 communicates with the first cavity 131, the outlet 102 communicates with the second cavity 132, the filter 20 is provided with a receiving portion 201 protruding toward the inside of the second cavity 132, the receiving portion 201 forms a receiving space 2011 at a side facing the first cavity 131, and the receiving space 2011 communicates with the first cavity 131. After the blood is filtered by the filter 20, plaque in the blood accumulates in the housing space 2011 and the first cavity 131.

In the embodiment, the accommodating portion 201 protrudes toward one side of the second cavity 132, and an accommodating space 2011 communicating with the first cavity 131 is formed on one side of the accommodating portion 201 toward the first cavity 131, so that the overall volume of the accommodating space 2011 and the first cavity 131 is increased as much as possible under the limited space of the cavity, so as to increase the plaque volume, and reduce the blockage of the conduit and the filter device 100 due to the smaller plaque volume of the filter device 100 when the plaque is more in blood. And also increases the filtering surface area of the filter 20 by providing the receiving portion 201 on the filter 20, thus reducing the probability of the filter 20 being clogged with plaque.

The receiving portion 201 may be a protrusion formed in a part of the filter element 20 facing the second cavity 132, or may be a protrusion formed in a whole of the filter element 20 facing the second cavity 132. In this embodiment, the inner side wall of the filtering portion 20 at least partially includes an arc-shaped structure, and in other embodiments, the inner side wall of the filtering portion 20 at least partially includes a wave-shaped structure, particularly a rugged structure, which can further increase the filtering surface area of the filtering member 20, thereby further reducing the probability of the filtering member 20 being blocked by plaque. Wherein at least part of the receiving portion 201 may be provided with an arc-shaped structure or a wave-shaped structure.

Referring to fig. 4, in this embodiment, the volume in the second cavity 132 near the outlet 102 is greater than the volume near the inlet 101. This arrangement is to allow more filtered blood to collect near the outlet 102 and less filtered blood to collect near the inlet 101, thereby facilitating rapid flow of filtered blood out of the outlet 102 and increasing filtration efficiency.

In some embodiments of the present invention, as shown in fig. 2, the housing assembly 10 includes an upper shell 11, a lower shell 12, and a seal 14. In an exemplary embodiment, referring again to fig. 3 to 5, the lower shell 12 is integrally formed in a cylindrical shape with an opening at one end, the upper shell 11 is integrally formed in a bottle cap shape, the upper shell 11 includes a top wall 112 and a side wall 111 disposed around the edge of the top wall 112, and when the upper shell 11 covers the opening of the lower shell 12, the side wall 111 of the upper shell 11 is sleeved outside the lower shell 12.

Specifically, as shown in fig. 5, the lower case 12 has a receiving chamber 121, and the receiving chamber 121 forms an opening at one end of the lower case 12, so that the filter 20 can be placed in the receiving chamber 121 through the opening, or the filter 20 can be taken out of the receiving chamber 121 through the opening. The upper case 11 is detachably connected to the lower case 12, and the upper case 11 can cover the opening of the accommodating chamber 121, and the sealing member 14 is provided between the upper case 11 and the lower case 12 to seal the gap between the upper case 11 and the lower case 12, so that the accommodating chamber 121 can be completely sealed by the upper case 11 and the sealing member 14, that is, the upper case 11, the lower case 12 and the sealing member 14 together define a closed cavity. In this embodiment, when the plaque accumulated in the filter device 100 is large, the upper shell 11 and the filter element 20 can be removed to remove the accumulated plaque, and then the upper shell 11 is mounted to the lower shell 12 again after removing the plaque, so that the suction operation can be continuously performed by the negative pressure pump, the plaque removing efficiency is improved, and the operation time is saved.

In the actual operation process, the sterilization operation is further included, and the interior and the exterior of the filter device 100 need to be sterilized simultaneously, specifically, the sterilization operation is performed on the interior of the filter device 100 under the condition that the upper shell and the lower shell of the filter device 100 are opened, then the sterilization operation is performed on the exterior of the filter device 100 after the filter device 100 is assembled, and in the assembly process, pollutants easily enter into a gap between the upper shell and the lower shell, so that the sterilization operation is performed on the gap between the upper shell and the lower shell.

In this embodiment, in fig. 5, an annular sealing groove 128 is provided at one end of the lower shell 12 facing the upper shell 11, the sealing member 14 is a sealing ring made of elastic material, the sealing member 14 is provided in the sealing groove 128, and when the upper shell 11 and the lower shell 12 are clamped, the top wall 112 and the lower shell 12 respectively press the sealing member 14, so that the sealing member 14 is elastically deformed to seal the accommodating cavity 121. Referring to fig. 2 to 5, the upper case 11 is provided with a sterilization port 110, the sterilization port 110 communicates with a sealing groove 128, and the sealing member 14 is closer to the receiving chamber 121 than the sterilization port 110. In other embodiments, the sealing groove 128 may be plural, and the plurality of sealing grooves 128 may be disposed around the receiving cavity 121.

Through be equipped with the annular seal groove 128 that sets up around holding chamber 121 at the one end of inferior valve 12 towards inferior valve 11, seal groove 128 is provided with sealing member 14, superior valve 11 is provided with sterilization mouth 110, sterilization mouth 110 and seal groove 128 intercommunication to under the condition that upper and lower casing has accomplished the connection, through sterilization mouth 110, the gap between the upper and lower casing disinfects, and sealing member 14 is closer to the cavity than sterilization mouth 110 simultaneously, and sealing member 14 can prevent the pollutant from getting into from sterilization mouth 110, thereby sealed cavity avoids destroying filter equipment's leakproofness. Here, the sealing member 14 is located closer to the cavity than the sterilizing port 110, specifically, the sterilizing port 110 is located at the peripheral portion of the sealing member 14 in the case where the upper and lower cases have completed connection.

It can be understood that the upper case 11 is provided with a first clamping portion, the lower case 12 is provided with a second clamping portion, and the upper case 11 is in clamping connection with the lower case 12 through the first clamping portion and the second clamping portion.

Specifically, in this embodiment, the inner side surface of the side wall 111 of the upper shell 11 is provided with a first clamping portion 114, the outer side wall 120 of the lower shell 12 is provided with a second clamping portion 15 matched with the first clamping portion 114 in a clamping manner, and the upper shell 11 and the lower shell 12 are clamped by the first clamping portion 114 and the second clamping portion 15, so that the filter device 100 can be quickly and conveniently disassembled and assembled, and plaque accumulated in the filter device 100 can be quickly cleaned.

In one embodiment, as shown in fig. 4 and 5, the first clamping portion 114 is a bump, and the second clamping portion 15 is a slot. Specifically, the outer side wall 120 of the lower shell 12 is provided with a bearing portion 125, the bearing portion 125 protrudes out of the outer side wall 120 of the lower shell 12 and forms a bearing surface 1251 on a side facing the upper shell 11, one end of the upper shell 11 facing the lower shell 12 abuts against the bearing surface 1251, and the upper shell 11 can slide on the bearing surface 1251. At least one protruding portion 126 is further provided on the outer side wall 120 of the lower case 12, the protruding portion 126 is located between the upper case 11 and the bearing portion 125, the protruding portion 126 is spaced from the bearing portion 125, and a clamping groove is defined between the protruding portion 126 and the bearing surface 1251. When the upper shell 11 is assembled, the upper shell 11 is covered on the lower shell 12, so that one end of the upper shell 11 facing the lower shell 12 is propped against the bearing surface 1251, and then the upper shell 11 is rotated, so that the protruding block rotates relative to the clamping groove until the protruding block is clamped into the clamping groove, and the clamping connection between the upper shell 11 and the lower shell 12 is realized. It is understood that the bearing portion 125 may be a unitary structure, or the bearing portion 125 may have a plurality of sections disposed opposite the plurality of raised portions 126.

In an embodiment, the projection of the cross section of the sterilization port 110 perpendicular to the axial direction of the filtering device falls on the projection of the protrusion 126 on the cross section, when the gas sterilization is performed, the protrusion 126 can block the gap between the upper shell and the lower shell, and the sterilization gas can be prevented from slipping away from the gap between the upper shell and the lower shell, so that the sterilization gas is more intensively introduced into the sealing groove 128 for sterilization, and the sterilization effect is improved.

In the present embodiment, when the number of the protruding portions 126 is plural, the number of the protruding portions 126 is the same as the number of the protruding portions 126, and the protruding portions 126 are in one-to-one correspondence. The plurality of bosses 126 are disposed at intervals in sequence in the circumferential direction of the lower case 12, and the length dimension of the gap between any adjacent two bosses 126 is greater than the length of the bump so that the bump can pass through the gap between any adjacent two bosses 126.

In this embodiment, the outer side wall 120 of the lower shell 12 is further provided with a first stop block 127, the first stop block 127 is located at one end or in the middle of the clamping groove, and when the bump is clamped into the clamping groove and moves to one end of the clamping groove where the first stop block 127 is provided, the first stop block 127 abuts against the bump, so as to limit the bump to move continuously, and prevent the bump from being inserted into one end of the clamping groove and sliding out from the other end of the clamping groove.

Further, referring to fig. 3, 4 and 5, the bump is provided with a groove 1141, a first stop 127 and a second stop 129 are disposed in the slot at intervals, when the bump enters the slot, one end of the bump abuts against one end of the first stop 127 after passing through the surface of the second stop 129, and at this time, the second stop 129 is clamped in the groove 1141, so that the upper shell 11 and the lower shell 12 are not easy to be unscrewed in both clockwise and anticlockwise directions, and the upper shell 11 and the lower shell 12 are further fixed. In other embodiments, only the second stop 129 may be provided, and the second stop 129 is clamped in the groove 1141, so that the upper shell 11 and the lower shell 12 may be fixed.

In another embodiment, the first clamping portion 114 is a clamping groove, and the second clamping portion 15 is a bump. Specifically, at least one protruding block is disposed on the outer side wall 120 of the lower shell 12, the protruding block is located on the outer side wall 120 of the lower shell 12 near one end of the upper shell 11, a bearing surface 1251 is formed on a side of the top wall 112 of the upper shell 11 facing the lower shell 12, one end of the lower shell 12 facing the upper shell 11 abuts against the bearing surface 1251, and the lower shell 12 can slide on the bearing surface 1251. At least one boss 126 is provided on the inner side surface of the side wall 111 of the upper shell 11, the boss 126 being spaced from the top wall 112 and defining a slot between the boss 126 and the bearing surface 1251. When the upper shell 11 is assembled, the upper shell 11 is covered on the lower shell 12, so that one end of the lower shell 12 facing the upper shell 11 is propped against the bearing surface 1251, and then the upper shell 11 is rotated, so that the protruding block rotates relative to the clamping groove until the protruding block is clamped into the clamping groove, and the clamping connection between the upper shell 11 and the lower shell 12 is realized. In the present embodiment, when the number of the protruding portions 126 is plural, the number of the protruding portions 126 is the same as the number of the protruding portions 126, and the protruding portions 126 are in one-to-one correspondence. The plurality of bosses 126 are disposed at intervals in sequence in the circumferential direction of the upper case 11, and the length dimension of the gap between any adjacent two bosses 126 is greater than the length of the bump so that the bump can pass through the gap between any adjacent two bosses 126.

In some embodiments of the present invention, as shown in fig. 6, the filter 20 includes a filter portion 21, a connection portion 22, and a drainage portion 23.

Specifically, as shown in fig. 4 to 6, the filter portion 21 is integrally protruded toward the inside of the second cavity 132 to form a receiving portion 201, such that the receiving portion 201 is bowl-shaped and the bowl opening is disposed toward the upper case 11. The connecting portion 22 is arranged at the edge of the filtering portion 21 in a surrounding mode and is connected with the filtering portion 21, the connecting portion 22 is in an annular shape, when the filter element 20 is assembled to the lower shell 12, the circumferential edge of the connecting portion 22 is abutted against the inner wall of the accommodating cavity 121, so that the filter element 20 divides the accommodating cavity 121 into a space (namely a first cavity 131) facing the upper shell 11 side and a space (namely a second cavity 132) facing away from the upper shell 11 side, and the plaque is prevented from flowing into the second cavity 132 from between the filter element 20 and the inner wall of the accommodating cavity 121 and then flowing into the negative pressure pump to cause blockage through the abutting of the circumferential edge of the connecting portion 22 and the inner wall of the accommodating cavity 121. In one exemplary embodiment, the filtering portion 21 includes a mesh, the filtering portion 21 is integrally formed with the connection portion 22, and the filtering portion 21 has a bowl shape in shape to increase the surface area of the filtering portion 21 for filtering and reduce the probability of plaque clogging the filtering member 20.

As shown in fig. 5 and 6, the drainage portion 23 is disposed on the sidewall of the filter element 20 and penetrates through the sidewall of the filter element 20, specifically, the drainage portion 23 extends from the outer sides of the filter portion 21 and the connection portion 22 toward the inner wall side of the accommodating cavity 121 and abuts against the inner wall of the accommodating cavity 121, so that a gap is avoided between the drainage portion 23 and the inner wall of the accommodating cavity 121. The drainage portion 23 is provided with a drainage groove 231, the drainage groove 231 penetrates the drainage portion 23, one end of the drainage groove 231 is communicated with the accommodating space 2011, and the other end of the drainage groove 231 is communicated with the inlet 101. Blood carrying the plugs such as thrombus and plaque smoothly enters the filter element at the inlet under the drainage of the drainage part, so that the blood flow entering the filter part is improved, and the filtration rate and efficiency are improved. Wherein, the top of drainage groove 231 is the open state, and/or the bottom of drainage groove 231 is level with the bottom of filtering part 21, and the axial cross-sectional area of drainage part can be furthest enlarged to the design to improve the blood flow that gets into filtering part, avoid the blood jam, improve filtration rate. Referring to fig. 6, the cross section of the drainage groove 231 in the axial direction of the filtering device or the inlet position of the drainage groove 231 in this embodiment is U-shaped, and in other embodiments, the drainage groove is not limited to U-shaped, and may be circular, elliptical or other shapes.

In other embodiments, the filter element 20 may not include the drain 23 and the inlet 101 may be provided on the sidewall of the lower housing 12 above the filter element 20, where the overall thickness of the lower housing 12 is thicker. In other embodiments, the filter element 20 may not include the connection portion 22, and directly abuts against the inner wall of the accommodating cavity 121 through the circumferential edge of the filter portion 21.

In this embodiment, as shown in fig. 4 and 6, since the drainage portion 23 is disposed on the sidewall of the filter element 20 and penetrates through the sidewall of the filter element 20, the inlet 101 and the outlet 102 are both disposed on the lower casing 12, and the inlet 101 and the outlet 102 are disposed around the circumference of the filter element 20, the mixed liquid of blood and plaque flowing in from the inlet 101 flows down through the drainage groove 231 and flows into the bottom of the housing space 2011 from the side of the housing space 2011. In other embodiments, the inlet 101 may be located in the upper housing 11 and the outlet 102 may be located in the lower housing 12. However, in comparison with the case where the inlet 101 is located in the upper case 11 and the outlet 102 is located in the lower case 12, the case where both the inlet 101 and the outlet 102 are provided in the lower case 12 means that the pipe connecting the inlet 101 and the outlet 102 is connected to only the lower case 12, and it is more convenient to detach the upper case 11 from the lower case 12 to clean the filtering apparatus, and it is more convenient to operate.

In some embodiments of the present invention, as shown in fig. 5, along the height direction of the accommodating cavity 121, i.e., the direction from the bottom of the accommodating cavity 121 to the opening of the accommodating cavity 121, the inner wall of the accommodating cavity 121 is provided with a step structure including a first step 122 provided near the upper case 11 and a second step 123 connected to the first step 122, the second step 123 being located at one side near the bottom of the accommodating cavity 121, specifically, the inner diameter of the accommodating cavity 121 at the first step 122 is larger than the inner diameter of the accommodating cavity 121 at the second step 123, such that a step surface 124 is formed between the first step 122 and the second step 123, and when the filter 20 is assembled to the lower case 12, one end of the connecting portion 22 toward the second cavity 132 is abutted against the step surface 124. Referring to fig. 4, 5 and 6, the upper case 11 is provided with a boss 113, the boss 113 is disposed on a side of the top wall 112 of the upper case 11 facing the lower case 12, and the boss 113 protrudes toward a side of the accommodating cavity 121, when the filtering apparatus 100 is in an assembled state, one end of the boss 113 facing the lower case 12 abuts against one end of the connecting portion 22 facing the first cavity 131, thereby limiting the filtering member 20 through the boss 113 and the step surface 124, limiting the movement of the filtering member 20 along the height direction of the accommodating cavity 121, and improving the stability of the filtering member 20 during the filtering process.

Further, a limiting groove 1231 is provided on the second step 123, the limiting groove 1231 extends along the height direction of the accommodating cavity 121, and the limiting groove 1231 forms an opening towards one end of the upper shell 11, and the drainage portion 23 can be inserted into the limiting groove 1231 through the opening, wherein the outer contour of the drainage portion 23 abuts against the inner wall of the limiting groove 1231, so that the positioning between the filter element 20 and the lower shell 12 can be rapidly realized through the cooperation of the drainage portion 23 and the limiting groove 1231, and the assembly efficiency is improved. Moreover, the filter element 20 can be limited to rotate relative to the lower shell 12 around the symmetry axis of the accommodating cavity 121 through the cooperation of the drainage part 23 and the limiting groove 1231, so that the stability of the filter element 20 in the filtering process is further improved. In other embodiments, the second step 123 may be an integral ring structure, or may be a plurality of unit structures formed on the inner wall of the accommodating cavity 121 in a surrounding manner.

Referring to fig. 4, the housing assembly 10 is provided with an input channel 1011 and an output channel 1021, one end of the input channel 1011 is communicated with the first cavity 131, an inlet 101 is formed at one end of the input channel 1011 communicated with the first cavity 131, the other end of the input channel 1011 is communicated with the outside of the housing assembly 10, one end of the output channel 1021 is communicated with the second cavity 132, an outlet 102 is formed at one end of the output channel 1021, and the other end of the output channel 1021 is communicated with the outside of the housing assembly 10. In this embodiment, the input channel 1011 includes a first input channel 1012 and a second input channel 1013, wherein the inner diameter of the first input channel 1012 is larger than the inner diameter of the second input channel 1013, thereby facilitating the fixing of the input pipe (one end of which is at the junction of the first input channel 1012 and the second input channel 1013. Similarly, the output channel 1021 includes a first output channel 1022 and a second output channel 1023, wherein the inner diameter of the first output channel 1022 is larger than the inner diameter of the second output channel 1023, thereby facilitating the fixing of the one end of the output pipe at the junction of the first output channel 1022 and the second output channel 1023.

Referring to fig. 7, in one embodiment, the second input channel 1013 includes a flare that communicates with the inlet 101, i.e., the inner diameter of the second input channel 1013 increases gradually from one end to the other end, and then the end having the largest inner diameter is connected to the inlet 101. In another embodiment, the input channel 1011 is overall horn-shaped, i.e., the inner diameter of the input channel 1011 increases gradually from one end to the other end, and then the end having the largest inner diameter is connected to the inlet 101. By this arrangement, the inlet flow rate can be increased, and the inlet 101 can be prevented from being blocked by the blood carrying thrombus, and the filtration rate can be increased. It will be appreciated that a flare may also be included in the output passage 1021, for example, on the second output passage 1023, or on the output passage 1021 as a whole.

In another embodiment, referring to FIG. 8, an inlet channel 1011 extends from a side wall or bottom of the housing assembly to a location at or near the bottom of the filter element 20, forming an inlet 101 in the filter element 20. When there are many plugs such as thrombus in blood, the inlet 101 is arranged at the bottom of the filter element 20 or near the bottom, so that the pressure of liquid entering from the inlet 101 can be utilized to wash away the thrombus deposited at the bottom of the filter element 20, thereby improving the filtering effect of the filter element 20.

Referring to fig. 4, 7 and 8, in the axial direction of the filter device, the center of the inlet 101 is higher than the center of the outlet 102, which is located at the bottom of the second cavity 132. By the design, the phenomenon that blood residues and thrombus float in the filtering device can be avoided, and the operating table is polluted by residual liquid in the process of opening the filtering device after the suction is finished.

According to an embodiment of the present invention, a negative pressure suction pump assembly is provided, comprising a negative pressure pump, a filter device 100, a first conduit and a second conduit. Specifically, the outlet 102 of the filtering device 100 communicates with the negative pressure pump through the second pipe, and the blood drawn from the patient is filtered by the filtering device 100 and then flows into the negative pressure pump. The negative pressure suction pump assembly provided by the invention can be used for sucking away the lesion plaque deposited in the blood vessel of a patient. In the implementation process, the distal end of the first pipeline is connected with a distal passage catheter, the distal passage catheter stretches into a vascular lesion site, the proximal end of the first pipeline, the filtering device 100, the negative pressure pump and other components are sequentially connected, the negative pressure pump is started to pump out lesion plaques from blood vessels through the distal passage catheter, and the lesion plaques are conveyed to the filtering device 100 through the first pipeline to be filtered and then stored in the accommodating space 2011 of the filtering device 100. The negative pressure suction pump assembly provided by the invention can avoid the blockage failure of the negative pressure pump caused by the fact that larger plaque of the first pipeline enters the negative pressure pump through the filtering device 100 for filtering, and can manually clean the plaque accumulated in the filtering device 100 by disassembling the upper shell 11 of the filtering device 100, so that the blockage problem caused by the larger plaque is solved.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (12)

1. The utility model provides a filter equipment, its characterized in that, filter equipment is equipped with entry and export, filter equipment includes casing subassembly and filter, have the cavity in the casing subassembly, the filter is located the cavity and will the cavity is divided into first cavity and second cavity, the entry with first cavity intercommunication, the export with second cavity intercommunication, wherein, the filter includes:

a filtering part;

the drainage part is arranged on the side wall of the filtering part and penetrates through the side wall of the filtering part, the drainage part is provided with a drainage groove communicated with the first cavity, and the inlet is positioned on one side of the drainage part and is communicated with the first cavity through the drainage groove.

2. The filter device according to claim 1, wherein the top of the drainage groove is open and/or the bottom of the drainage groove is level with the bottom of the filter portion.

3. A filter device according to claim 1, wherein the housing assembly is provided with an inlet channel communicating with the first cavity, the inlet being formed at an end of the inlet channel communicating with the first cavity, the other end of the inlet channel communicating with the outside of the housing assembly.

4. A filter device according to claim 3, wherein at least one end of the inlet channel comprises a flare communicating with the inlet.

5. The filter device of claim 1, wherein the outlet is located at a bottom of the second cavity.

6. The filter device of claim 1, wherein the housing assembly comprises:

the lower shell is provided with a containing cavity with one end open, and the filter element is arranged in the containing cavity;

and the upper shell is detachably connected with the lower shell and covers the opening.

7. The filter device according to claim 6, wherein,

the filter part comprises a net-shaped piece, the filter part is bowl-shaped and the bowl opening is arranged towards the upper shell, and the inner side wall of the filter part at least partially comprises an arc-shaped structure or a wave-shaped structure.

8. The filter device according to claim 6, wherein,

the filter element further comprises a connecting part, the connecting part is arranged at the edge of the filter part in a surrounding mode, and the circumferential edge of the connecting part is abutted with the inner wall of the accommodating cavity;

along the axial direction of the accommodating cavity, the inner wall of the accommodating cavity is provided with a step structure, the step structure comprises a first step and a second step, and a step surface is formed between the first step and the second step;

the upper shell is provided with a boss protruding towards the accommodating cavity, and the upper end and the lower end of the connecting part are respectively in butt fit with the step surface and the boss.

9. The filter device of claim 8, wherein the filter device comprises a filter element,

the second step is close to the bottom of holding chamber and sets up, the second step is equipped with the spacing groove, the spacing groove is in the orientation one side of epitheca forms confession drainage portion male opening, drainage portion's outline with the inner wall butt of spacing groove.

10. The filter device according to claim 6, wherein,

the upper shell is provided with a first clamping part, the lower shell is provided with a second clamping part, and the upper shell is connected with the lower shell through the first clamping part and the second clamping part in a clamping way.

11. The filter device according to claim 10, wherein one of the first clamping portion and the second clamping portion is a protruding block, the other one is a clamping groove, a groove is formed in the protruding block, a first stop block and/or a second stop block are/is arranged in the clamping groove at intervals, when the protruding block enters the clamping groove, one end of the protruding block abuts against one end of the first stop block after passing through the surface of the second stop block, and at the moment, the second stop block is clamped in the groove.

12. A negative pressure suction pump assembly, the negative pressure suction pump assembly comprising:

a negative pressure pump;

a filter device according to any one of claims 1 to 11;

a first conduit in communication with an inlet of the filter device;

and the outlet of the filtering device is communicated with the negative pressure pump through the second pipeline.