Container shell for blood filter

Abstract

The utility model discloses a container shell for a blood filter, which is characterized in that a second shell is inserted into one side of a first shell, a volume cavity is formed by the first shell and the second shell, and a filter membrane is arranged on the inner side of the volume cavity; a first flow guide structure is arranged on the inner wall of the first shell, a second flow guide structure is arranged on the inner wall of the second shell, and the first flow guide structure and the second flow guide structure guide liquid in the volume cavity; according to the device, the flow channels of the liquid inlet and the liquid outlet are additionally arranged, the flow guide structures are arranged on the two sides of the flow channels, blood enters the liquid inlet, flows out of the first flow channels and diffuses to the upper surface of the whole filter membrane along a path formed by the first flow guide structures arranged in the first shell in parallel, the blood filtering path is prolonged, the filter membrane and the edge part are fully utilized, and the blood filtering efficiency is improved. The second flow guide structure is arranged continuously or discontinuously and corresponds to the position of the part, with the maximum blood flow, of the liquid inlet.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a container shell for a blood filter. Background Art

[0002] Leukocyte-removal blood filters are used to remove leukocytes from whole blood or blood components. Currently, existing blood filters comprise a housing, a filter membrane, a liquid inlet, and a liquid outlet. During use, blood enters the inlet, passes through multiple layers of filter membranes, and exits the outlet. During this process, target components in the blood are intercepted by the membranes, achieving their removal. However, existing filter membranes have the following disadvantages: During use, blood entering the filter, under the influence of gravity, flows through the middle of the membrane to the liquid outlet, but cannot pass through the edges of the membrane, thus underutilizing the edges. As blood passes through the membrane, gravity gathers at the bottom of the membrane, causing this portion of the membrane to easily become saturated, resulting in a relatively short residence time within the filter. Because the area of ​​the filter membrane is proportional to the volume of blood it can filter, using a portion of the membrane to filter all the blood can easily result in inadequate blood filtration. Furthermore, to achieve acceptable filtration rates, more membranes must be used during production, increasing production costs. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to provide a container shell for a blood filter.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a container housing for a blood filter, comprising:

[0005] First shell

[0006] One side of the first shell is plugged into the second shell to form a volume cavity with the second shell, and a filter membrane is provided inside the volume cavity;

[0007] A first flow-guiding structure is provided on the inner wall of the first shell, and a second flow-guiding structure is provided on the inner wall of the second shell. The first flow-guiding structure and the second flow-guiding structure guide the liquid in the volume cavity.

[0008] As a further description of the above technical solution: an outer surface of the first shell is provided with a first protrusion extending upward, and the first protrusion extends from the outer end surface of the first shell to the middle, and the height gradually decreases.

[0009] As a further description of the above technical solution: a liquid inlet is provided on the first protrusion, and the liquid inlet is connected to the inner side of the first shell through the first protrusion.

[0010] As a further description of the above technical solution: the outer surface of the second shell is provided with a second protrusion in a direction opposite to the first protrusion, the second protrusion is connected to the inner side of the second shell, and the second protrusion is provided with a liquid outlet.

[0011] As a further description of the above technical solution: a first flow channel is opened on the inner wall of the first shell, and the position of the first flow channel corresponds to the position of the first protrusion; a second flow channel is opened on the inner wall of the second shell, and the position of the second flow channel corresponds to the position of the second protrusion.

[0012] As a further description of the above technical solution: the first flow guide structure is a plurality of baffles extending continuously outward, the plurality of baffles are arranged in parallel and form an angle with the arrangement direction of the first flow channel;

[0013] The second flow-guiding structure is a plurality of baffles extending outward continuously or discontinuously. The baffles are arranged in parallel and form an angle with the arrangement direction of the second flow channel.

[0014] As a further description of the above technical solution: the inner side of the first shell is stepped, forming a first platform and a second platform from the outside to the inside, the first platform is provided with a third protrusion extending outward, and the second platform is provided with a first ridge extending outward.

[0015] As a further description of the above technical solution: the inner side of the second shell is stepped, forming a third platform and a fourth platform from the outside to the inside, and the third platform is provided with an inward extending groove, and the groove cooperates with the third protrusion, and the fourth platform is provided with a second ridge extending outward.

[0016] As a further description of the above technical solution: the first ridge and the second ridge clamp the filter membrane.

[0017] As a further description of the above technical solution: the third protrusion is inclined outward, and the outer side is set to a pointed end, and the tolerance after matching with the groove is 0.67-1.27mm. The third protrusion is welded to the groove, and the weld is less than 0.05mm.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] 1. Flow channels are added to the liquid inlet and outlet, and diversion structures are installed on both sides of the flow channels. Leukocyte-containing blood enters the liquid inlet and flows out of the first flow channel, spreading along the path formed by the first diversion structure arranged parallel to the first shell to the entire upper surface of the filter membrane. This extends the blood filtration path and fully utilizes the filter membrane and its edges to filter leukocyte-containing blood. The second diversion structure is semi-continuous and semi-intermittent, with the discontinuity corresponding to the portion of the liquid inlet where blood flow is greatest. Filtered blood can flow out along the discontinuity of the second diversion structure, quickly transferring the filtered blood to the liquid outlet, increasing the speed at which the filtered blood flows out of the liquid outlet. At the same time, it prevents the accumulation of leukocyte-depleted blood from saturating the filter membrane and reducing the filtration efficiency of that portion of the filter membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the first shell in the present utility model;

[0021] Figure 2 This is a rear view of the first housing in the present invention;

[0022] Figure 3 It is a cross-sectional view of the first shell in the present utility model;

[0023] Figure 4 This is a front view of the second shell in the present utility model;

[0024] Figure 5 This is a rear view of the second housing in the present invention;

[0025] Figure 6 It is a cross-sectional view of the second shell in the present invention.

[0026] Legend:

[0027] 1. First shell; 101. First platform; 102. Second platform; 103. Third protrusion; 104. First ridge; 11. First flow guide structure; 12. First protrusion; 13. Liquid inlet; 14. First flow channel; 2. Second shell; 201. Third platform; 202. Fourth platform; 203. Groove; 204. Second ridge; 21. Second flow guide structure; 22. Second protrusion; 23. Liquid outlet; 24. Second flow channel. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Reference Figures 1-6 The utility model provides an embodiment: a container shell for a blood filter, comprising: a first shell 1; a second shell 2 is inserted into one side of the first shell 1 to form a volume cavity with the second shell, and a filter membrane is provided on the inner side of the volume cavity; a first guide structure 11 is provided on the inner wall of the first shell 1, and a second guide structure 21 is provided on the inner wall of the second shell 2, and the first guide structure 11 and the second guide structure 21 guide the liquid in the volume cavity.

[0030] The applicant discovered during research that most of the leukocyte-reduced blood filters currently used on the market have a short blood filtration path, which prevents the blood from fully utilizing the filter membrane, resulting in low blood filtration efficiency and poor effect of the leukocyte-reduced blood filters.

[0031] At the same time, there are problems with the shell design of some leukocyte-reduced blood filters, resulting in poor sealing of the outer edge; or liquid leakage. Liquid leakage means that during the blood filtration process, blood enters the liquid inlet and flows out from the liquid outlet due to leakage without passing through the filter membrane, thereby weakening the blood filtering effect of the leukocyte-reduced blood filter.

[0032] A first protrusion 12 and a first flow channel 14 are provided at the liquid inlet 13, and a second protrusion 22 and a second flow channel 24 are provided at the liquid outlet 23. With diversion structures provided on both sides of the flow channels, leukocyte-containing blood enters the liquid inlet and flows out of the first flow channel 14, spreading along the path formed by the first diversion structure 11 arranged parallel to the first housing 1 to the entire upper surface of the filter membrane. This extends the blood's filtration path and fully utilizes the filter membrane and its edges to filter the leukocyte-containing blood. The second diversion structure 21 can be provided continuously or intermittently, corresponding to the portion of the liquid inlet 13 where blood flow is greatest. Filtered blood can flow out along the discontinuities in the second diversion structure 21, rapidly transferring the filtered blood to the liquid outlet 23. This increases the velocity of the filtered blood out of the liquid outlet and prevents accumulation of leukocyte-depleted blood from saturating the filter membrane and reducing the filtration efficiency of that portion of the membrane.

[0033] An outer surface of the first shell 1 is provided with a first protrusion 12 extending upward. The first protrusion 12 extends from the outer end surface of the first shell 1 to the middle, and the height gradually decreases.

[0034] In this embodiment, the height of the first protrusion 12 is 5-10mm, preferably 8mm, and the first protrusion 12 is parallel to the end face of the first shell 1 from the outside to the inside, and then forms a slope of a first angle with the first shell 1 in a straight line, and then forms a slope of a second angle, and the second angle is smaller than the degree of the first angle. The degree of the first angle is 15°-30°, and the degree of the second angle is 1°-5°. Preferably, the horizontal distance is extended by 1-2mm with a slope of 20°; then the horizontal distance is extended by 25-35mm with a slope of 1.2°; finally, the horizontal distance is extended by 4-5mm with an arc to form a coplanar surface with the end face of the first shell 1. The specific size can be designed according to actual processing needs.

[0035] A liquid inlet 13 is provided on the first protrusion 12 , and the liquid inlet 13 is communicated with the inner side of the first housing 1 through the first protrusion 12 .

[0036] In this embodiment, the liquid inlet 13 is located on one end surface of the first protrusion 12 and extends to the outside of the first shell 1. Furthermore, an arrow-shaped groove is provided on the upper end surface of the first protrusion 12 to mark the liquid inlet 13.

[0037] The outer surface of the second shell 2 is provided with a second protrusion 22 in a direction opposite to the first protrusion 12 . The second protrusion 22 is communicated with the inner side of the second shell 2 . A liquid outlet 23 is provided on the second protrusion 22 .

[0038] In this embodiment, a second protrusion 22 is provided on the second shell 2, and a liquid outlet 23 is provided at one end of the second protrusion 22. During use, the first shell 1 is located above the second shell 2, and the blood is guided toward the liquid outlet 23 through the first guide structure 11 and the second guide structure 21, and flows out from the liquid outlet 23 below.

[0039] A first flow channel 14 is defined on the inner wall of the first shell 1 , and its position corresponds to that of the first protrusion 12 . A second flow channel 24 is defined on the inner wall of the second shell 2 , and its position corresponds to that of the second protrusion 22 .

[0040] In this embodiment, the position of the first flow channel 14 corresponds to the position of the first protrusion 12. The first flow channel 14 is connected to the liquid inlet 13. A groove parallel to the first shell 1 is provided on the side close to the liquid inlet 13 with a depth of 2-5 mm. Then, a slope of 5-15° is provided with a length of 15-25 mm. The design can be made according to actual needs to allow blood to enter the first shell 1.

[0041] Similarly, the second flow channel 24 has the same structure as the first flow channel 14 but in the opposite direction and is arranged at a position corresponding to the second protrusion 22, so that the blood flows out from the liquid outlet 23 and is evenly dispersed, avoiding the situation in which the blood in the traditional filter is concentrated in the lower part due to gravity.

[0042] The first guide structure 11 is a plurality of baffles extending outward continuously, and the baffles are arranged in parallel and form an angle with the setting direction of the first flow channel 14; the second guide structure 21 is a plurality of baffles extending outward continuously or intermittently, and the baffles are arranged in parallel and form an angle with the setting direction of the second flow channel 24.

[0043] In this embodiment, the first flow-guiding structure 11 is configured as a plurality of continuous baffles, which are symmetrically arranged on both sides of the first flow channel 14, and the angle between the baffles on both sides is 135°. The baffles are arranged in parallel and the distance between each other is 1-2 mm. Among them, the edges of six baffles are connected to the first flow channel 14, and the blood flowing out of the first flow channel 14 is diverted to the entire filter membrane.

[0044] The second guide structure 21 is composed of a plurality of continuous baffles and a plurality of intermittent baffles, which are symmetrically arranged on both sides of the second flow channel 24. The angle between the baffles on both sides is 135° and is opposite to the setting direction of the first guide structure 11, so as to guide the blood in the volume cavity to the second flow channel 24 and flow out from the liquid outlet 23. Among them, continuous baffles are set on the edge of the second flow channel 24, and intermittent baffles are set on the side away from the second flow channel 24. The filtered blood can flow out along the discontinuity of the second guide structure 21, and the filtered blood is quickly transferred to the liquid outlet 23, thereby increasing the speed of the filtered blood flowing out of the liquid outlet 23, and at the same time avoiding the situation where the leukocyte-reduced blood accumulates and saturates the filter membrane, resulting in a decrease in the filtration effect of this part of the filter membrane.

[0045] The inner side of the first shell 1 is stepped, forming a first platform 101 and a second platform 102 from the outside to the inside. The first platform 101 is provided with a third protrusion 103 extending outward, and the second platform 102 is provided with a first ridge 104 extending outward.

[0046] In this embodiment, the first platform 101 is provided with a 49° bevel, and the acute-angled edge portion is close to the outer edge of the first shell 1. The second platform 102 is 1-2 mm deeper than the first platform 101. The third protrusion is 1.5-1.7 mm away from the outer edge of the first platform 101, the outer height is 4.00 mm, and the inner height is 4.56 mm. A 5° angle is designed on the end face of the third protrusion 103 to form a pointed tip. The third protrusion 103 is inclined outward, and the outer side surface has a 93° angle with the first platform 101.

[0047] A first ridge 104 with a width of 1.74 mm and a height of 0.49 mm is located on the second platform 102 inside the third protrusion 103. The cross-section of the first ridge 104 is an isosceles triangle, which clamps the filter membrane. The sides of the first platform 101, second platform 102, third protrusion 103, and first ridge 104 are all connected by 90° arcs to form rounded corners.

[0048] The inner side of the second shell 2 is stepped, forming a third platform 201 and a fourth platform 202 from the outside to the inside. The third platform 201 is provided with an inwardly extending groove 203, which cooperates with the third protrusion 103. The fourth platform 202 is provided with an outwardly extending second ridge 204; the first ridge 104 and the second ridge 204 clamp the filter membrane; the third protrusion 103 is inclined outward, and the outer side is set to a pointed end. The tolerance after cooperation with the groove 203 is 0.67-1.27mm. The third protrusion 103 is welded to the groove 203, and the weld seam is less than 0.05mm.

[0049] In this embodiment, the outer edge dimensions of the third platform 201 are identical to those of the first platform 101, providing a mating fit. The third platform 201 includes an inwardly extending groove 203. The outer wall of the groove 203 forms a 93° angle with the bottom surface, while the inner wall forms a 92° angle with the bottom surface. This angle, in conjunction with the third protrusion 103, allows for better contact between the inner and outer walls of the groove 203 during mating, increasing friction. Simultaneously, the acute angle of the third protrusion 103 melts during welding, forming close contact with the bottom surface of the groove 203 and ensuring a tight fit around the edges of the housing. When the number of membrane layers in the housing is 8-11, the first and second ridges 104, 204, ensure compaction of the membrane edges, ensuring a leak-proof leukocyte-reduced blood filter.

[0050] There are rounded corners at the connections between the liquid inlet 13 and the liquid outlet 23 and the first protrusion 12 and the second protrusion 22 .

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A container housing for a blood filter, characterized in that: include: a first housing (1); One side of the first shell (1) is plugged into the second shell (2), forming a volume cavity with the second shell, and a filter membrane is provided inside the volume cavity; A first flow-guiding structure (11) is provided on the inner wall of the first shell (1), and a second flow-guiding structure (21) is provided on the inner wall of the second shell (2); the first flow-guiding structure (11) and the second flow-guiding structure (21) guide the liquid in the volume cavity.

2. The container shell according to claim 1, characterized in that: The outer surface of the first shell (1) is provided with a first protrusion (12) extending upwards, and the first protrusion (12) extends from the outer end surface of the first shell (1) to the middle, and the height gradually decreases.

3. The container shell according to claim 2, characterized in that: A liquid inlet (13) is provided on the first protrusion (12), and the liquid inlet (13) is communicated with the inner side of the first shell (1) through the first protrusion (12).

4. The container shell according to claim 2, wherein: The outer surface of the second shell (2) is provided with a second protrusion (22) in a direction opposite to the first protrusion (12); the second protrusion (22) is connected to the inner side of the second shell (2); and a liquid outlet (23) is provided on the second protrusion (22).

5. The container shell according to claim 4, characterized in that: A first flow channel (14) is provided on the inner wall of the first shell (1), and the position of the first flow channel (14) corresponds to the position of the first protrusion (12); a second flow channel (24) is provided on the inner wall of the second shell (2), and the position of the second flow channel (24) corresponds to the position of the second protrusion (22).

6. The container shell according to claim 5, characterized in that: The first flow-guiding structure (11) is a plurality of baffles extending continuously outward, the baffles being arranged in parallel and forming an angle with the arrangement direction of the first flow channel (14); The second flow-guiding structure (21) is a plurality of baffles extending outward continuously or discontinuously, and the plurality of baffles are arranged in parallel and form an angle with the arrangement direction of the second flow channel (24).

7. The container shell according to claim 1, characterized in that: The inner side of the first shell (1) is stepped, forming a first platform (101) and a second platform (102) in sequence from the outside to the inside; the first platform (101) is provided with a third protrusion (103) extending outward, and the second platform (102) is provided with a first ridge (104) extending outward.

8. The container shell according to claim 7, characterized in that: The inner side of the second shell (2) is stepped, and a third platform (201) and a fourth platform (202) are formed in sequence from the outside to the inside. The third platform (201) is provided with an inwardly extending groove (203), and the groove (203) cooperates with the third protrusion (103). The fourth platform (202) is provided with a second ridge (204) extending outward.

9. The container shell according to claim 8, characterized in that: The first ridge (104) and the second ridge (204) clamp the filter membrane.

10. The container shell according to claim 8, characterized in that: The third protrusion (103) is inclined outward and is provided with a pointed tip on the outside. The tolerance after matching with the groove (203) is 0.67-1.27 mm. The third protrusion (103) and the groove (203) are welded, and the weld is less than 0.05 mm.

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