WO2024060977A1

WO2024060977A1 - Filtering apparatus and negative pressure suction pump assembly

Info

Publication number: WO2024060977A1
Application number: PCT/CN2023/116704
Authority: WO
Inventors: 汤麟; 唐辉强; 李思漪
Original assignee: 深圳市先健神康医疗有限公司
Priority date: 2022-09-22
Filing date: 2023-09-04
Publication date: 2024-03-28
Also published as: CN117771780A

Abstract

The present invention relates to a filtering apparatus and a negative pressure suction pump assembly. The filtering apparatus is provided with an inlet and an outlet. The filtering apparatus comprises a housing assembly and a filter element. The filter element is disposed in a cavity and divides the cavity into a first cavity and a second cavity, the inlet being in communication with the first cavity, and the outlet being in communication with the second cavity. The filter element comprises: a filtering portion; and a drainage portion disposed on a side wall of the filtering portion and penetrating through the side wall of the filtering portion, the drainage portion being provided with a drainage groove in communication with the first cavity, and the inlet being located at a side of the drainage portion and in communication with the first cavity by means of the drainage groove. The present filtering apparatus can improve blood flow into a filter element, improving a filtering rate and efficiency.

Description

Filter device and negative pressure suction pump assembly

Technical Field

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

Background technique

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

Peristaltic pumps are often used in medical equipment as a source of negative pressure. The driven peristaltic pump has a rotor, and is equipped with rollers that rotate with the rotor. The rollers alternately squeeze and release the hose to pump fluid. However, if plaque in the blood enters the peristaltic pump, it will cause blockage of the peristaltic pump. Therefore, a filtering device needs to be installed in the pipeline to filter the plaque in the blood. In existing filtering devices, when a large amount of blood is filtered, the blood carrying clots, plaques and other obstructions is prone to accumulate thrombus when entering the filter element at the inlet, making it difficult for the blood at the entrance to enter the filter element, and further Affects filtration rate and efficiency.

Contents of the invention

The purpose of the present invention is to at least solve the problems of slow filtration rate and low efficiency of the filter device. This purpose is achieved through the following technical solutions:

According to a first aspect of the present invention, a filtering device is provided. The filtering device is provided with an inlet and an outlet. The filtering device includes a housing assembly and a filter element. The housing assembly has a cavity inside. The filtering device is provided with an inlet and an outlet. A member is provided in the cavity and separates the cavity into a first cavity and a second cavity, the inlet is connected to the first cavity, and the outlet is connected to the second cavity, wherein , the filter elements include:

Filtration Department;

A drainage part is provided on the side wall of the filter part and penetrates the side wall of the filter part. The drainage part is provided with a drainage groove connected with the first cavity, and the inlet is located at the side of the drainage part. One side is connected to the first cavity through the drainage groove.

The above-mentioned filter device is provided with a drainage part on the filter element, wherein the drainage part is provided on the side wall of the filter element and penetrates the side wall of the filter element, and the drainage part is provided with a drainage groove connected with the first cavity, so that the blood carrying blockages such as thrombus and plaque can enter the filter element very smoothly at the entrance under the drainage of the drainage part. This increases the blood flow into the filter section, improving the filtration rate and efficiency.

According to the second technical solution of the present invention, a negative pressure suction pump assembly is also proposed, which is characterized in that the negative pressure suction pump assembly includes: a negative pressure pump; the filter device described in the first technical solution; A pipe is connected with the inlet of the filtering device; a second pipe is connected with the outlet of the filtering device and the negative pressure pump through the second pipe.

Description of the 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 for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the invention. Also throughout the drawings, the same parts are designated by the same reference numerals. In the attached picture:

Figure 1 schematically shows a structural diagram of a filter device according to an embodiment;

Figure 2 schematically shows an exploded view of parts of a filter device according to an embodiment;

Figure 3 schematically shows a structural diagram of a filter device from a top view according to an embodiment;

Figure 4 schematically shows a cross-sectional view of part A-A in Figure 3;

Figure 5 schematically shows a structural diagram of the lower shell of an embodiment;

Figure 6 schematically shows a structural diagram of a filter element according to an embodiment;

Figure 7 schematically shows a cross-sectional view of part A-A in another embodiment;

Fig. 8 schematically shows a cross-sectional view of the A-A portion in yet another embodiment.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a thorough understanding of the disclosure, and to 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 dictates otherwise. The terms "comprises", "includes", "contains" and "having" are inclusive and thus indicate the presence of stated features, steps, operations, elements and/or parts but do not exclude the presence or addition of one or Multiple other features, steps, operations operations, components, parts, and/or combinations thereof. The method steps, processes, and operations described herein are not to be construed as requiring that they be performed in the particular order described or illustrated, unless an order of performance is expressly indicated. It should also be understood 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 shall not be referred to as restricted by these terms. These terms are 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, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

The "axial direction of the filter device" refers to the direction connecting the center of the upper shell and the center of the lower shell, and can also be understood as the thickness direction or height direction of the filter device. The axial direction of the elements contained in the filter device is parallel to the "axial direction of the filter device".

An embodiment of the present invention provides a filtering device, which is used to filter plaques in blood to prevent plaques from flowing into the negative pressure pump and causing obstruction of the negative pressure pump.

As shown in FIGS. 1 to 2 , the filter device 100 includes a housing assembly 10 and a filter element 20 .

3 and 4, the housing assembly 10 has a closed cavity inside, and the housing assembly 10 is provided with an inlet 101 and an outlet 102 that communicate with the cavity. The filter element 20 is provided inside the cavity and connects the inlet 101 and the outlet. 102 is isolated, and the blood enters the cavity through the inlet 101, is filtered by the filter member 20, and then flows out from the outlet 102. In detail, the filter element 20 divides the cavity into a first cavity 131 and a second cavity 132. The inlet 101 is connected to the first cavity 131, and the outlet 102 is connected to the second cavity 132. The filter element 20 is provided with a cavity facing the first cavity 131. two The receiving portion 201 is raised inside the cavity 132 . The receiving portion 201 forms a receiving space 2011 on the side facing the first cavity 131 . The receiving space 2011 is connected with the first cavity 131 . After the blood is filtered through the filter 20 , plaques in the blood are accumulated in the receiving space 2011 and the first cavity 131 .

In this embodiment, one side of the receiving portion 201 is raised toward the second cavity 132, and a receiving space 2011 connected to the first cavity 131 is formed on the side of the receiving portion 201 facing the first cavity 131, so that in the cavity Under limited space, the overall volume of the receiving space 2011 and the first cavity 131 is increased as much as possible to increase the capacity of plaques and reduce the risk of ducts caused by the small plaque capacity of the filtering device 100 when there are many plaques in the blood. and clogging of the filter device 100 . Moreover, by providing the receiving portion 201 on the filter element 20, the filtering surface area of the filter element 20 is also increased, thereby reducing the probability that the filter element 20 is blocked by plaque.

It should be noted that the receiving portion 201 may be a convex structure formed by a local area of the filter member 20 facing the second cavity 132 , or may be a convex structure formed by the entire filter member 20 facing the second cavity 132 . In this embodiment, at least part of the inner wall of the filter part 20 includes an arc-shaped structure. In other embodiments, at least part of the inner wall of the filter part 20 includes a wavy structure, specifically an uneven structure. The wavy structure can The filter surface area of the filter element 20 is further increased, thereby further reducing the probability that the filter element 20 is blocked by plaque. At least part of the receiving portion 201 may be provided with an arc-shaped structure or a wavy structure.

Referring to FIG. 4 , in this embodiment, the volume of the second cavity 132 near the outlet 102 is larger than the volume near the inlet 101 . This setting is to allow the filtered blood to gather more near the outlet 102 and less near the inlet 101, thereby facilitating the filtered blood to flow out quickly from the outlet 102, thus increasing the 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, please refer to FIGS. 3 to 5 again, the lower shell 12 is in the shape of a cylinder with one end open, and the upper shell 11 is in the shape of a bottle cap. The upper shell 11 includes a top wall 112 and an annular ring. The side wall 111 on the edge of the top wall 112 is sleeved on the outside of the lower shell 12 when the upper shell 11 covers the opening of the lower shell 12 .

Specifically, as shown in FIG. 5 , the lower shell 12 has an accommodating cavity 121 , and the accommodating cavity 121 forms an opening at one end of the lower shell 12 , so that the filter element 20 can be placed in the accommodating cavity 121 through the opening, or pass through the opening. The filter element 20 can be taken out of the accommodation cavity 121 through the opening. The upper shell 11 and the lower shell 12 are detachably connected, and the upper shell 11 can cover the opening of the accommodation cavity 121. The sealing member 14 is disposed between the upper shell 11 and the lower shell 12 to connect the upper shell 11 and the lower shell 12. The gap between them is sealed, so that the container can be sealed through the upper shell 11 and the seal 14 The cavity 121 is completely sealed, that is, the upper shell 11 , the lower shell 12 and the seal 14 jointly define a sealed cavity. In this embodiment, the upper shell 11 is detachably connected to the lower shell 12. When there are many plaques accumulated inside the filtering device 100, the accumulated plaques can be removed by disassembling the upper shell 11 and the filter element 20, and then the plaques can be removed. After the removal, reinstall the upper shell 11 to the lower shell 12 so that the suction operation can be continuously performed through the negative pressure pump, thereby improving the efficiency of plaque removal and saving operation time.

In the actual operation process, it also includes a sterilization operation, which requires sterilizing the inside and outside of the filter device 100 at the same time. The specific operation is to first open the upper shell and the lower shell of the filter device 100 and then sterilize the inside of the filter device 100. Sterilize, and then sterilize the outside of the filter device 100 after assembling the filter device 100. During the assembly process, contaminants can easily enter the gap between the upper shell and the lower shell, so it is necessary to sterilize the upper shell and the lower shell. Sterilize the gaps between them.

In this embodiment, in FIG. 5 , one end of the lower shell 12 facing the upper shell 11 is provided with an annular sealing groove 128 surrounding the accommodation cavity 121 . The sealing member 14 is a sealing ring made of elastic material. The sealing member 14 is disposed in the sealing groove 128. When the upper shell 11 and the lower shell 12 are engaged, the top wall 112 and the lower shell 12 respectively squeeze the sealing member 14, causing the sealing member 14 to elastically deform to seal the accommodation cavity 121. Referring to Figures 2 to 5, the upper shell 11 is provided with a sterilization port 110. The sterilization port 110 is connected with the sealing groove 128. The seal 14 is closer to the accommodation cavity 121 than the sterilization port 110. In other embodiments, there may be a plurality of sealing grooves 128 , and the plurality of sealing grooves 128 may be provided around the accommodation cavity 121 .

An annular sealing groove 128 is provided around the accommodating cavity 121 at one end of the lower shell 12 facing the upper shell 11, and a sealing member 14 is provided in the sealing groove 128. The upper shell 11 is provided with a sterilization port 110, and the sterilization port 110 is connected to the sealing groove 128. Thus, when the upper and lower shells have been connected, the gap between the upper and lower shells is sterilized through the sterilization port 110. At the same time, the sealing member 14 is closer to the cavity than the sterilization port 110. The sealing member 14 can prevent contaminants from entering from the sterilization port 110, thereby sealing the cavity and avoiding damage to the sealing of the filter device. Here, the sealing member 14 is closer to the cavity than the sterilization port 110, which specifically means that when the upper and lower shells have been connected, the sterilization port 110 is located at the outer portion of the sealing member 14.

It can be understood that the upper shell 11 is provided with a first snapping portion, and the lower shell 12 is provided with a second snapping portion. The upper shell 11 and the lower shell 12 are snap-connected through the first snapping portion and the second snapping portion.

Specifically, in this embodiment, a first engaging portion 114 is provided on the inner side of the side wall 111 of the upper case 11 , and a second engaging portion 114 is provided on the outer side wall 120 of the lower case 12 to engage with the first engaging portion 114 . The clamping part 15, the upper shell 11 and the lower shell 12 are connected through the first clamping part 114 and the second clamping part 15, so as to facilitate the quick and convenient disassembly and assembly of the filter device 100, so as to facilitate the quick assembly and disassembly of the filter device. 100 Internal plaque accumulation into OK to clean up.

In one embodiment, as shown in Figures 4 and 5, the first engaging portion 114 is a bump, and the second engaging portion 15 is a engaging groove. Specifically, the outer wall 120 of the lower shell 12 is provided with a bearing portion 125 . The bearing portion 125 protrudes from the outer wall 120 of the lower shell 12 and forms a bearing surface 1251 on the side facing the upper shell 11 . The upper shell 11 faces the lower shell 12 One end of the upper case 11 is against the bearing surface 1251, and the upper shell 11 can slide on the bearing surface 1251. At least one raised portion 126 is also provided on the outer side wall 120 of the lower shell 12 . The raised portion 126 is located between the upper shell 11 and the bearing portion 125 . The raised portion 126 is spaced apart from the bearing portion 125 , and is located on the raised portion 126 A card slot is defined between the bearing surface 1251 and the bearing surface 1251 . When assembling the upper shell 11, first cover the upper shell 11 on the lower shell 12 so that one end of the upper shell 11 facing the lower shell 12 abuts the bearing surface 1251. Then, by rotating the upper shell 11, the bumps rotate relative to the slot until The bumps are locked into the slots to realize the snap connection between the upper shell 11 and the lower shell 12 . It can be understood that the bearing portion 125 can be an integral structure, or the bearing portion 125 has multiple sub-sections, and the multiple sub-sections are arranged opposite to the plurality of protruding portions 126 .

In one embodiment, the projection of the sterilization port 110 on the cross-section of the filter device perpendicular to the axial direction falls on the projection of the protruding portion 126 on the cross-section. When gas sterilization is performed, the protruding portion 126 can Blocking the gap between the upper shell and the lower shell can prevent the sterilizing gas from slipping from the gap between the upper shell and the lower shell, so that the sterilizing gas can enter the sealing groove 128 for sterilization in a concentrated manner, thereby improving the efficiency of the sterilization process. Sterilization effect.

In this embodiment, when the number of protrusions 126 is multiple, the number of protrusions is the same as the number of protrusions 126 , and the protrusions correspond to the protrusions 126 one-to-one. The plurality of protrusions 126 are arranged at intervals along the circumferential direction of the lower shell 12 , and the length of the gap between any two adjacent protrusions 126 is greater than the length of the protrusion, so that the protrusion can pass from any adjacent protrusion 126 . The gap between the two protrusions 126 passes through.

In this embodiment, the outer wall 120 of the lower shell 12 is also provided with a first stopper 127. The first stopper 127 is located at one end or in the middle of the card slot. When the protrusion is inserted into the card slot and moves to the card slot, a first stopper 127 is provided. When one end of the first stopper 127 is closed, the first stopper 127 resists the protrusion, thereby restricting the protrusion from continuing to move and preventing the protrusion from being inserted into one end of the slot and sliding out from the other end of the slot.

Further, with reference to Figure 3, Figure 4 and Figure 5, the bump is provided with a groove 1141, and a first stopper 127 and a second stopper 129 are spaced in the slot. When the bump enters the slot, the bump One end of the second stopper 129 passes through the surface of the second stopper 129 and then collides with one end of the first stopper 127. At this time, the second stopper 129 is held in the groove 1141, so that it is not easy to move the upper case in both clockwise and counterclockwise directions. 11 and the lower shell 12 are unscrewed, and the upper shell 11 and the lower shell 12 are further fixed. In other embodiments, only the second stopper 129 can be provided, and the second stopper 129 is clamped in the groove 1141, and the fixation between the upper shell 11 and the lower shell 12 can also be achieved.

In another embodiment, the first clamping part 114 is a slot, and the second clamping part 15 is a bump. Specifically, at least one bump is provided on the outer side wall 120 of the lower shell 12 . The bump is located on the outer side wall 120 of one end of the lower shell 12 close to the upper shell 11 . The top wall 112 of the upper shell 11 is formed on the side facing the lower shell 12 On the bearing surface 1251 , one end of the lower shell 12 facing the upper shell 11 abuts the bearing surface 1251 , and the lower shell 12 can slide on the bearing surface 1251 . At least one protruding portion 126 is provided on the inner surface of the side wall 111 of the upper case 11 . The protruding portion 126 is spaced apart from the top wall 112 , and a slot is defined between the protruding portion 126 and the bearing surface 1251 . When assembling the upper shell 11, first cover the upper shell 11 on the lower shell 12, so that one end of the lower shell 12 facing the upper shell 11 abuts the bearing surface 1251, and then rotate the upper shell 11 to make the bump rotate relative to the slot. Until the protrusion snaps into the slot, the snap connection between the upper shell 11 and the lower shell 12 is achieved. In this embodiment, when the number of protrusions 126 is multiple, the number of protrusions is the same as the number of protrusions 126 , and the protrusions correspond to the protrusions 126 one-to-one. The plurality of protrusions 126 are arranged at intervals along the circumferential direction of the upper case 11 , and the length of the gap between any two adjacent protrusions 126 is greater than the length of the protrusion, so that the protrusion can be separated from any adjacent protrusion 126 . The gap between the two protrusions 126 passes through.

In some embodiments of the present invention, as shown in FIG. 6 , the filter element 20 includes a filter part 21 , a connecting part 22 and a drainage part 23 .

Specifically, as shown in FIGS. 4 to 6 , the entire filter portion 21 protrudes toward the inside of the second cavity 132 to form a receiving portion 201 , so that the receiving portion 201 is bowl-shaped, and the bowl mouth is disposed toward the upper shell 11 . The connecting part 22 is arranged around the edge of the filter part 21 and is connected to the filter part 21 . The connecting part 22 is in an annular shape. When the filter element 20 is assembled to the lower shell 12 , the circumferential edge of the connecting part 22 is in contact with the edge of the accommodating cavity 121 . The inner walls are in contact, so that the filter element 20 divides the accommodation cavity 121 into a space on the side facing the upper shell 11 (i.e., the first cavity 131) and a space on the side facing away from the upper shell 11 (i.e., the second cavity 132). Furthermore, the circumferential edge of the connecting portion 22 is in contact with the inner wall of the accommodating cavity 121 to prevent plaque from flowing from between the filter element 20 and the inner wall of the accommodating cavity 121 into the second cavity 132 and then into the negative pressure pump to cause obstruction. In an exemplary embodiment, the filtering part 21 includes a mesh, the filtering part 21 and the connecting part 22 are of an integrated structure, and the filtering part 21 is bowl-shaped in shape, so as to increase the surface area of the filtering part 21 for filtration, and reduce the The probability that small plaque blocks the filter 20.

As shown in FIGS. 5 and 6 , the drainage portion 23 is provided on the side wall of the filter element 20 and penetrates the side wall of the filter element 20 . Specifically, the drainage portion 23 is accommodated from the outer side of the filter portion 21 and the connecting portion 22 . One side of the inner wall of the cavity 121 extends and contacts the inner wall of the accommodating cavity 121 to avoid a gap between the drainage part 23 and the inner wall of the accommodating cavity 121 . The drainage part 23 is provided with a drainage groove 231 . The drainage groove 231 penetrates the drainage part 23 . One end of the drainage groove 231 is connected with the receiving space 2011 , and the other end of the drainage groove 231 is connected with the inlet 101 . The blood carrying clots, plaques and other blockages is drained by the drainage part and enters the filter element very smoothly at the entrance, thereby increasing the blood flow into the filter part and improving the filtration rate and efficiency. The top of the drainage groove 231 is in an open state, and/or the bottom of the drainage groove 231 is flush with the bottom of the filter part 21. Such a design can maximize the axial cross-sectional area of the drainage part, thereby increasing the flow rate into the filter part. blood flow, avoid blood blockage and improve filtration rate. Referring to Figure 6, in this embodiment, the cross section of the drainage channel 231 in the axial direction of the filter device or the entrance position of the drainage channel 231 is U-shaped. In other embodiments, it is not limited to a U-shape and can be circular or oval. Or other shapes.

In other embodiments, the filter element 20 may not include the drainage portion 23, and the inlet 101 may be disposed on the side wall of the lower shell 12 above the filter element 20, in which case the overall thickness of the lower shell 12 is relatively thick. In other embodiments, the filter element 20 may not include the connecting portion 22, and the peripheral edge of the filter portion 21 may directly abut against the inner wall of the accommodating cavity 121.

In this embodiment, please refer to FIG. 4 and FIG. 6 , since the drainage portion 23 is provided on the side wall of the filter element 20 and penetrates the side wall of the filter element 20, the inlet 101 and the outlet 102 are both provided on the lower shell 12, and the inlet 101 and the outlet 102 are provided around the circumference of the filter element 20, therefore, the mixed liquid of blood and plaque flowing in from the inlet 101 flows into the bottom of the receiving space 2011 from the side of the receiving space 2011 under the drainage of the drainage groove 231. In other embodiments, the inlet 101 may be located in the upper shell 11, and the outlet 102 may be located in the lower shell 12. However, compared with the scheme in which the inlet 101 is located in the upper shell 11 and the outlet 102 is located in the lower shell 12, the scheme in which the inlet 101 and the outlet 102 are both provided on the lower shell 12 means that the pipeline connecting the inlet 101 and the outlet 102 is only connected to the lower shell 12, which makes it more convenient to disassemble the upper shell 11 from the lower shell 12 to clean the filter device, and 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 , that is, 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 configured It is a step structure. The step structure includes a first step 122 provided close to the upper shell 11 and a second step 123 connected to the first step 122. The second step 123 is located on one side close to the bottom of the accommodation cavity 121. Specifically, the 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, so that a step surface 124 is formed between the first step 122 and the second step 123. When the filter element 20 is assembled to the lower shell 12 At this time, one end of the connecting portion 22 facing the second cavity 132 abuts the step surface 124 . 4, 5 and 6, the upper shell 11 is provided with a boss 113. The boss 113 is located on the side of the top wall 112 of the upper shell 11 facing the lower shell 12, and the boss 113 faces one side of the accommodation cavity 121. When the filter device 100 is in the assembled state, the end of the boss 113 facing the lower shell 12 and the end of the connecting portion 22 facing the first cavity 131 are in contact with each other. Therefore, the filter element 20 is limited by the boss 113 and the stepped surface 124, restricting the movement of the filter element 20 along the height direction of the accommodation cavity 121, and improving the stability of the filter element 20 during the filtration process.

Further, a limiting groove 1231 is provided on the second step 123 , the limiting groove 1231 extends along the height direction of the accommodation cavity 121 , and the limiting groove 1231 forms an opening toward one end of the upper shell 11 , through which the drainage part 23 can be inserted. In the limiting groove 1231, the outer contour of the drainage part 23 offsets the inner wall of the limiting groove 1231, so that the positioning between the filter element 20 and the lower shell 12 can be quickly achieved through the cooperation of the drainage part 23 and the limiting groove 1231. , improve assembly efficiency. Moreover, the cooperation between the drainage portion 23 and the limiting groove 1231 can also restrict the rotation of the filter element 20 around the symmetry axis of the accommodation cavity 121 relative to the lower shell 12 to further improve the stability of the filter element 20 during the filtration process. In other embodiments, the second step 123 may be an integral annular structure, or may be a plurality of unit structures annularly provided on the inner wall of the accommodating cavity 121 .

Referring to Figure 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 connected to the first cavity 131, and an inlet 101 is formed at one end of the input channel 1011 connected to the first cavity 131. The other end of the input channel 1011 is connected to the outside of the housing assembly 10 , and one end of the output channel 1021 is connected to 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 connected to 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, where the inner diameter of the first input channel 1012 is larger than the inner diameter of the second input channel 1013, thereby facilitating the fixation of one end of the input pipe ( The junction of an input channel 1012 and a second input channel 1013. Similarly, the output channel 1021 includes a first output channel 1022 and a second output channel 1023, where the inner diameter of the first output channel 1022 is greater than the inner diameter of the second output channel 1023, This facilitates fixing one end of the output pipe at the junction of the first output channel 1022 and the second output channel 1023 .

Referring to Figure 7, in one embodiment, the second input channel 1013 includes a bell mouth, and the connecting inlet 101 of the bell mouth, that is, the inner diameter of the second input channel 1013 gradually increases from one end to the other end, and then the inner diameter of the bell mouth has the largest inner diameter. One end is connected to the entrance 101. In another embodiment, the input channel 1011 has a trumpet shape as a whole, that is, the inner diameter of the input channel 1011 gradually increases from one end to the other end, and then the end with the largest inner diameter is connected to the inlet 101 . Such an arrangement can increase the inlet flow rate, prevent blood carrying thrombus from clogging the inlet 101, and at the same time increase the filtration rate. It can be understood that the output channel 1021 may also include a bell mouth, for example, it may be provided on the second output channel 1023, or it may be provided on the entire output channel 1021.

In another embodiment, referring to Figure 8, input channel 1011 extends from the side wall or bottom of the housing assembly An inlet 101 is formed on the filter element 20 at or near the bottom of the filter element 20 . When there are many blockages such as thrombus in the blood, the inlet 101 is set at the bottom of the filter element 20 or near the bottom. The pressure of the liquid entering from the inlet 101 can be used to flush away the clogged thrombus deposited at the bottom of the filter element 20, thereby improving filtration. Piece 20 filter effects.

Referring to Figures 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, and the outlet is located at the bottom of the second cavity 132. This design can avoid residual blood and floating thrombus in the filter device. After the suction is completed, the remaining liquid in the process of opening the filter device will not contaminate the operating table.

According to an embodiment of the present invention, a negative pressure suction pump assembly is proposed, including a negative pressure pump, a filter device 100, a first pipeline and a second pipeline. Specifically, the outlet 102 of the filter device 100 is connected to the negative pressure pump through the second pipeline, and the blood extracted from the patient's body is filtered by the filter device 100 and then flows into the negative pressure pump. The negative pressure suction pump assembly proposed by the present invention can be used to extract the diseased plaques accumulated in the patient's blood vessels. During the implementation process, the distal end of the first pipeline is connected to the distal access catheter, the distal access catheter is extended into the vascular lesion site, the proximal end of the first pipeline and the filter device 100, the negative pressure pump and other components are connected in sequence, the negative pressure pump is started to extract the diseased plaques out of the blood vessel through the distal access catheter, and the diseased plaques are transported to the filter device 100 through the first pipeline for filtration and then accumulated in the receiving space 2011 of the filter device 100. The negative pressure suction pump assembly proposed in the present invention can prevent larger plaques in the first pipeline from entering the negative pressure pump and causing blockage and failure of the negative pressure pump by filtering through the filter device 100, and can manually clean the plaques accumulated in the filter device 100 by disassembling the upper shell 11 of the filter device 100, thereby solving the blockage problem caused by larger plaques.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention. All substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A filtering device, characterized in that the filtering device is provided with an inlet and an outlet, the filtering device includes a housing assembly and a filter element, the housing assembly has a cavity, and the filtering element is located in the cavity. The cavity is divided into a first cavity and a second cavity, the inlet is connected to the first cavity, and the outlet is connected to the second cavity, wherein the filter element includes :

Filtration Department;

A drainage part is provided on the side wall of the filter part and penetrates the side wall of the filter part. The drainage part is provided with a drainage groove connected with the first cavity, and the inlet is located at the side of the drainage part. One side is connected to the first cavity through the drainage groove.
The filter device according to claim 1, wherein the top of the drainage trough is in an open state, and/or the bottom of the drainage trough is flush with the bottom of the filter part.
The filtering device according to claim 1 is characterized in that the shell assembly is provided with an input channel, the input channel is connected to the first cavity, the inlet is formed at the end where the input channel is connected to the first cavity, and the other end of the input channel is connected to the outside of the shell assembly.
The filter device according to claim 3, wherein at least one end of the input channel includes a bell mouth, and the bell mouth is connected to the inlet.
The filter device according to claim 1, wherein the outlet is located at the bottom of the second cavity.
The filter device according to claim 1, characterized in that the housing assembly comprises:

A lower shell, the lower shell is provided with an accommodation cavity with one end open, and the filter element is arranged in the accommodation cavity;

An upper shell is detachably connected to the lower shell and covers the opening.
The filter device according to claim 1, wherein one end of the lower shell facing the upper shell is provided with a sealing groove, the sealing groove is provided with a sealing member, and the upper shell is provided with a sterilization port, so The sterilization port is connected to the sealing groove, the sealing member is closer to the cavity than the sterilization port, and the sealing member can seal the cavity.
The filter device according to claim 6, characterized in that:

The filter part includes a mesh member, the filter part is bowl-shaped in shape, and the mouth of the bowl is disposed toward the upper shell. At least part of the inner wall of the filter part includes an arc-shaped structure or a wavy structure.
The filter device according to claim 6, characterized in that:

The filter element also includes a connecting portion, which is ringed around the edge of the filtering portion, and the circumferential edge of the connecting portion abuts against the inner wall of the accommodation 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 includes a first step and a second step, and a step is formed between the first step and the second step. step surface;

The upper shell is provided with a boss protruding toward the accommodating cavity, and the upper and lower ends of the connecting portion abut and cooperate with the step surface and the boss respectively.
The filtering device according to claim 9, characterized in that

The second step is provided close to the bottom of the accommodation cavity, and the second step is provided with a limiting groove, and the limiting groove forms an opening for the insertion of the drainage part on the side facing the upper shell, so The outer contour of the drainage portion is in contact with the inner wall of the limiting groove.
The filter device according to claim 6, characterized in that:

The upper shell is provided with a first engaging portion, the lower shell is provided with a second engaging portion, and the upper shell and the lower shell are engaged through the first engaging portion and the second engaging portion. Connect.
The filter device according to claim 11, characterized in that one of the first clamping part and the second clamping part is a convex block, and the other is a latching groove, and the convex block is provided with There is a groove, and first blocks and/or second blocks are spaced in the slot. When the bump enters the slot, one end of the bump moves from the surface of the second block. After passing through, it abuts one end of the first stopper, and at this time, the second stopper is held in the groove.
The filter device according to claim 1, characterized in that the filter element is provided with a direction facing the A convex receiving portion is formed inside the second cavity, and a receiving space is formed on one side of the receiving portion toward the first cavity, and the receiving space is connected with the first cavity.
A negative pressure suction pump assembly, characterized in that the negative pressure suction pump assembly includes:

Negative pressure pump;

The filter device according to any one of claims 1-13;

A first pipe connected with the inlet of the filter device;

A second pipe. The outlet of the filter device is connected to the negative pressure pump through the second pipe.