Disposable heat and moisture exchange filter

Abstract

The utility model discloses a kind of disposable heat and moisture exchange filter, including shell, filter being located in the shell, first connecting port being located in the one end of the shell and the internal of the shell is through, second connecting port being located in the other end of the shell and the internal of the shell is through, first flow cone being located in the first connecting port and the intersection of the shell and second flow cone being located in the second connecting port and the intersection of the shell, the tip of the first flow cone and the second flow cone respectively towards the first connecting port and the second connecting port, and the first flow cone and the second flow cone are respectively provided with several first perforations and several second perforations through the first flow cone and the second flow cone in axial direction in it.The utility model sets up first flow cone and second flow cone can make gas evenly dispersed to entire filter, effectively improve the utilization of filter.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a disposable heat and moisture exchange filter. Background Technology

[0002] A heat-moisture exchange filter is a respiratory filtration device used in medical devices such as masks, endotracheal tubes, and laryngeal masks that connect to ventilators and anesthetics. It typically includes a housing, a filter housed within the housing, a first connection port at one end of the housing for connecting to a mask, and a second connection port at the other end for connecting to a ventilator or anesthesia machine. The filter collects and retains heat and moisture from exhaled air and also filters out bacteria, reducing the risk of bacterial contamination of the tubing. However, because the diameters of the first and second connection ports are smaller than the diameter of the housing, and because the first and second connection ports are coaxial, exhaled air typically travels in a straight line during heat-moisture exchange. This means that the exhaled air usually only passes through the middle section of the filter, resulting in only the middle section absorbing heat, moisture, and bacteria. This can easily lead to saturation and fatigue in the middle section of the filter, resulting in underutilization of its capacity. Therefore, designing a heat-moisture exchanger that allows exhaled air to pass evenly through the entire filter to improve its utilization rate is a crucial issue. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a disposable heat exchange filter that can make exhaled and inhaled gas pass through the entire filter evenly to improve the filter utilization rate.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a disposable heat and moisture exchange filter is provided, including a shell and a filter disposed inside the shell. One end of the shell is provided with a first connection port that communicates with the interior of the shell, and the other end of the shell is provided with a second connection port that communicates with the interior of the shell. The filter also includes a first guide cone disposed at the junction of the first connection port and the shell for guiding exhaled gas and a second guide cone disposed at the junction of the second connection port and the shell for guiding inhaled gas. The tips of the first guide cone and the second guide cone face the first connection port and the second connection port, respectively. The first guide cone and the second guide cone are respectively provided with a plurality of first perforations and a plurality of second perforations penetrating the first guide cone and the second guide cone along the axial direction.

[0005] Furthermore, the first guide cone is connected to the inner wall of the first connection port via a first connecting strip, and the second guide cone is connected to the inner wall of the second connection port via a second connecting strip.

[0006] Furthermore, there are two first connecting strips, which are symmetrically connected to both sides of the first guide cone; there are also two second connecting strips, which are symmetrically connected to both sides of the second guide cone.

[0007] Furthermore, the first guide cone, the first connecting strip, and the first connecting port are integrally injection molded; the second guide cone, the second connecting strip, and the second connecting port are integrally injection molded.

[0008] Furthermore, both the first guide cone and the second guide cone are cones.

[0009] Furthermore, the outer casing includes an upper cover and a lower cover, the first connection port is fixedly connected to the top of the upper cover, the second connection port is fixedly connected to the bottom of the lower cover, and the upper cover and the lower cover are detachably connected.

[0010] Furthermore, the lower cover includes a large-diameter section and a small-diameter section, the outer surface of which is provided with an external thread, and the inner wall of the upper cover is provided with an internal thread that matches the external thread. The upper cover and the lower cover are connected by the internal thread and the external thread.

[0011] Furthermore, the outer diameter of the upper cover is equal to the outer diameter of the large diameter section. When the upper cover and the lower cover are threaded together, the bottom end of the upper cover abuts against the top end of the large diameter section, and a sealing ring is provided at the abutment point between the upper cover and the large diameter section.

[0012] Furthermore, a plurality of upper support blocks and a plurality of lower support blocks are respectively provided in the top wall of the upper cover and the bottom wall of the lower cover, and the upper support blocks and the lower support blocks respectively abut against the two sides of the filter.

[0013] Furthermore, each of the several upper support blocks and several lower support blocks is provided with a vent hole that penetrates through the several upper support blocks and several lower support blocks.

[0014] This utility model discloses a disposable heat and moisture exchange filter. By using a first guide cone at the junction of the first connection port and the outer shell and a second guide cone at the junction of the second connection port and the outer shell, the exhaled and inhaled gases no longer move in a straight line, but are evenly dispersed throughout the filter under the action of the first and second guide cones. At the same time, several perforations are provided in the first and second guide cones to allow the gas to pass through the guide cones in a straight line, so that the entire filter can be fully utilized and the utilization rate of the filter can be effectively improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional view of an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the upper cover in one embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the lower cover in one embodiment of the present invention.

[0019] The meanings of the reference numerals in the attached drawings are as follows: outer shell 1; upper cover 11; internal thread 111; upper support block 112; lower cover 12; large diameter section 121; external thread 1221; small diameter section 122; lower support block 123; filter 2; first connection port 3; second connection port 4; first guide cone 5; first perforation 51; first connecting strip 52; second guide cone 6; second perforation 61; second connecting strip 62; vent hole 7. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] Please see Figure 1 and Figure 2This utility model discloses a disposable heat and moisture exchange filter, comprising a housing 1 and a filter 2 disposed within the housing 1. One end of the housing 1 has a first connection port 3 communicating with the interior of the housing 1, and the other end of the housing 1 has a second connection port 4 communicating with the interior of the housing 1. It also includes a first guide cone 5 for guiding exhaled gas at the junction of the first connection port 3 and the housing 1, and a second guide cone 6 for guiding inhaled gas at the junction of the second connection port 3 and the housing 1. The tips of the first guide cone 5 and the second guide cone 6 face the first connection port 3 and the second connection port 4, respectively, and the first guide cone 5 and the second guide cone 6 are respectively provided with a plurality of first perforations 51 and a plurality of second perforations 61 penetrating the first guide cone 5 and the second guide cone 6 along the axial direction. The present invention provides a first guide cone 5 at the junction of the first connection port 3 and the outer shell 1, and a second guide cone 6 at the junction of the second connection port 4 and the outer shell 1. This design prevents exhaled and inhaled air from moving in a straight line, instead dispersing it evenly throughout the entire filter 2 under the action of the first and second guide cones 5 and 6. Simultaneously, several first perforations 51 and several second perforations 61 within the first and second guide cones 5 and 6 allow air to pass through them in a straight line, ensuring full utilization of the entire filter 2 and effectively improving its utilization rate.

[0022] Please continue reading Figure 3 and Figure 4In this embodiment, the outer casing 1 includes an upper cover 11 and a lower cover 12. A first connecting port 3 is fixedly connected to the top of the upper cover 11, and a second connecting port 4 is fixedly connected to the bottom of the lower cover 12. The upper cover 11 and the lower cover 12 are detachably connected. Specifically, the lower cover 12 includes a large-diameter section 121 and a small-diameter section 122. The outer surface of the small-diameter section 122 is provided with an external thread 1221, and the inner wall of the upper cover 11 is provided with an internal thread 111 that matches the external thread 1221. The upper cover 11 and the lower cover 12 are threadedly connected by the internal thread 111 and the external thread 1221. When assembling the disposable heat exchange filter, hold the lower cover 12 with the small diameter section 122 facing upwards. Align the internal thread 111 of the inner wall of the upper cover 11 with the external thread 1221 of the small diameter section 122 of the lower cover 12. Slowly rotate the upper cover 11, as if tightening a screw, allowing the upper cover 11 to gradually descend along the thread until the bottom end of the upper cover 11 tightly abuts against the top end of the large diameter section 121 of the lower cover 12. At this point, the sealing ring (not shown in the figure) is compressed, ensuring a sealing effect, and the outer shell assembly is complete. To disassemble, simply rotate the upper cover 11 in the opposite direction to separate it from the lower cover 12. This structural design divides the outer shell 1 into two parts, facilitating the installation and debugging of the filter 2. In the production process, workers can easily place components such as the filter 2, the first guide cone 5, and the second guide cone 6 inside the outer shell 1, improving production efficiency and reducing operational difficulty. The threaded connection is simple and reliable, requiring only a rotation to achieve a tight fixation. Compared to complex clips or adhesive bonding, it requires no additional tools and ensures a stable connection, preventing the filter housing from accidentally opening during use and transportation, thus guaranteeing normal equipment operation. The outer diameter of the upper cover 11 is equal to the outer diameter of the large diameter section 121. When the upper cover 11 and lower cover 12 are threaded together, the bottom end of the upper cover 11 abuts against the top end of the large diameter section 121, and a sealing ring (not shown in the figure) is provided at the abutment point. The equal outer diameter of the upper cover 11 and the large diameter section 121 makes the overall appearance of the housing 1 more regular after the upper cover 11 and lower cover 12 are connected. In medical and other scenarios with high requirements for hygiene and appearance, this facilitates storage and organization, and also gives users a professional and neat impression. On the other hand, the sealing ring effectively prevents the intrusion of external dust, moisture, and other impurities, protecting the internal heat and humidity exchange environment of the filter 2, maintaining the stable performance of the filter 2, and extending its service life. At the same time, for single-use products, they can be kept in good condition during the storage period before use.

[0023] The first guide cone 5 is connected to the inner wall of the first connecting port 3 via two first connecting strips 52. The two first connecting strips 52 are symmetrically connected on both sides of the first guide cone 5. The first guide cone 5, the first connecting strips 52, and the first connecting port 3 are integrally injection molded. The first guide cone 5 is conical in shape, connected to the inner wall of the first connecting port 3 via two symmetrically distributed first connecting strips 52 on its two sides. All three are manufactured using an integral injection molding process. This integrated structure ensures a tight and stable connection between the first guide cone 5 and the first connecting port 3, eliminating the risk of gaps or loose connections. The two evenly distributed first connecting strips 52 provide stable support for the first guide cone 5, ensuring it does not sway or shift under gas impact.

[0024] The second guide cone 6 is connected to the inner wall of the second connecting port 4 via a second connecting strip 62. There are two second connecting strips 62, symmetrically connected on both sides of the second guide cone 6. The second guide cone 6, the second connecting strips 62, and the second connecting port 4 are integrally injection molded. Similarly, the second guide cone 6 is also conical in shape, connected to the inner wall of the second connecting port 4 by two symmetrically arranged second connecting strips 62 on both sides, and the second guide cone 6, the second connecting strips 62, and the second connecting port 4 are also integrally injection molded. Thus, the connection between the second guide cone 6 and the second connecting port 4 has a high degree of integrity, ensuring structural strength. The two second connecting strips 62 can effectively distribute the force, maintaining the stable structure of the second guide cone 6. The integral injection molding design greatly simplifies the production process, reduces component assembly steps, improves production efficiency, and reduces production costs. It also avoids product quality problems caused by assembly errors, ensuring that the connection accuracy between the first guide cone 5 and the second guide cone 6 and the first connecting port 3 and the second connecting port 4 of each product is consistent. The conical design of the first guide cone 5 and the second guide cone 6 conforms to the principles of fluid mechanics. When gas contacts the guide surfaces of the first guide cone 5 and the second guide cone 6, it can be evenly dispersed along the inclined surfaces of the first guide cone 5 and the second guide cone 6, guiding the exhaled or inhaled gas to smoothly change its flow direction, allowing the gas to diffuse more efficiently throughout the entire filter 2, making full use of the filter area of ​​the filter 2 and improving the filtration effect. The structure of the two symmetrically distributed first connecting strips 52 and the second connecting strips 62 provides balanced support for the first guide cone 5 and the second guide cone 6. When subjected to gas impact, it can prevent the first guide cone 5 and the second guide cone 6 from tilting or falling off due to uneven force, ensuring the continuous stability of the guiding function.

[0025] Since the filter 2 is located between the upper cover 11 and the lower cover 12, in order to support the filter 2 and prevent the two sides of the filter 2 from sealing the first connection port 3 and the second connection port 4 and reducing the flow of gas, in this embodiment, a plurality of upper support blocks 112 and a plurality of lower support blocks 123 are respectively provided in the top wall of the upper cover 11 and the bottom wall of the lower cover 12. The upper support blocks 112 and the lower support blocks 123 respectively abut against the two sides of the filter 2. After the upper cover 11 and the lower cover 12 are assembled together, the plurality of upper support blocks 112 located in the top wall of the upper cover 11 contact the filter 2 from above. The evenly distributed upper support blocks 112 are closely arranged along the upper surface contour of the filter 2, providing downward pressure support to the filter 2. At the same time, the plurality of lower support blocks 123 in the bottom wall of the lower cover 12 abut against the filter 2 from below. The reasonably distributed lower support blocks 123 fit into the lower surface of the filter 2, forming a reaction force on the pressure of the upper support blocks 112. The upper support block 112 and lower support block 123 provide reliable physical support for the filter 2, preventing it from shaking or shifting due to external factors such as vibration and collision during transportation and use. This ensures the structural integrity of the filter, maintains its filtration performance, and extends its service life. Simultaneously, they create a gas flow space between the first connection port 3, the second connection port 4, and the filter 2, allowing for smoother gas flow.

[0026] Since the upper support block 112 and the lower support block 123 are respectively located on the top wall of the upper cover 11 and the bottom wall of the lower cover 12, a certain amount of sealed space is formed when the upper support block 112 and the lower support block 123 support the filter 2. To solve this problem, vent holes 7 are provided on several upper support blocks 112 and several lower support blocks 123, penetrating through several upper support blocks 112 and several lower support blocks 123. By setting vent holes 7, the gas flow is smoother, and no dead air zones are formed due to the obstruction of the upper support blocks 112 and the lower support blocks 123, ensuring the continuity and efficiency of the heat and moisture exchange process. On the other hand, the evenly distributed vent holes 7 help the gas to be evenly dispersed to all parts of the filter 2, further improving the working efficiency of the filter 2, and allowing each filter medium to play its full role.

[0027] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A disposable heat and moisture exchange filter, comprising a housing and a filter disposed within the housing, wherein one end of the housing is provided with a first connection port communicating with the interior of the housing, and the other end of the housing is provided with a second connection port communicating with the interior of the housing, characterized in that: The first flow guide cone and the second flow guide cone are respectively provided with a plurality of first perforations and a plurality of second perforations penetrating the first flow guide cone and the second flow guide cone in the axial direction.

2. The disposable wet heat exchange filter according to claim 1, characterized in that: The first flow guide cone is connected to the inner wall of the first connecting port through a first connecting strip, and the second flow guide cone is connected to the inner wall of the second connecting port through a second connecting strip.

3. The disposable wet heat exchange filter according to claim 2, wherein: The first connecting strip is two, and the two first connecting strips are symmetrically connected to the two sides of the first flow guide cone; the second connecting strip is two, and the two second connecting strips are symmetrically connected to the two sides of the second flow guide cone.

4. The disposable wet heat exchange filter of claim 2, wherein: The first flow guide cone, the first connecting strip, and the first connecting port are integrally injection molded; the second flow guide cone, the second connecting strip, and the second connecting port are integrally injection molded.

5. The disposable wet heat exchange filter of claim 1, wherein: The first flow guide cone and the second flow guide cone are both conical.

6. The disposable wet heat exchange filter of claim 1, wherein: The shell comprises an upper cover and a lower cover, the first connecting port is fixedly connected to the top end of the upper cover, the second connecting port is fixedly connected to the bottom end of the lower cover, and the upper cover and the lower cover are detachably connected.

7. The disposable wet heat exchange filter according to claim 6, characterized in that: The lower cover comprises a large-diameter section with a larger diameter and a small-diameter section with a smaller diameter, the outer surface of the small-diameter section is provided with external threads, the inner wall of the upper cover is provided with internal threads matched with the external threads, and the upper cover and the lower cover are threadedly connected through the internal threads and the external threads.

8. The disposable wet heat exchange filter according to claim 7, characterized in that: The outer diameter of the upper cover is equal to the outer diameter of the large-diameter section, the bottom end of the upper cover abuts against the top end of the large-diameter section when the upper cover and the lower cover are threadedly connected, and a sealing ring is arranged at the abutting position of the upper cover and the large-diameter section.

9. The disposable wet heat exchange filter of claim 6, wherein: A plurality of upper supporting blocks and a plurality of lower supporting blocks are respectively arranged in the top wall of the upper cover and the bottom wall of the lower cover, and the upper supporting blocks and the lower supporting blocks respectively abut against the two sides of the filter.

10. The disposable wet heat exchange filter of claim 9, wherein: A plurality of air permeable holes are arranged on the upper supporting blocks and the lower supporting blocks.

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