CN216536614U

CN216536614U - Heat and moisture exchange filter

Info

Publication number: CN216536614U
Application number: CN202123253441.7U
Authority: CN
Inventors: 夏承强; 刘桂飞; 张丽丽
Original assignee: Shandong Weigao Group Medical Polymer Co Ltd
Current assignee: Shandong Weigao Group Medical Polymer Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-17
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a heat and moisture exchange filter, which comprises an upper shell, a lower shell and a filtering membrane arranged between the upper shell and the lower shell, wherein flow guide cones are arranged at an air inlet of the upper shell and an air outlet of the lower shell, and the small ends of the flow guide cones are far away from the filtering membrane; the diversion cone is connected to the inner wall surface of the air inlet or the inner wall surface of the air outlet through the support rib. The water conservancy diversion awl of the air inlet of epitheca and the setting of air outlet department of inferior valve can lead the dispersion to it from the source position that gaseous got into for partial gas dispersion is to filtration membrane position all around, has improved filtration membrane's adsorption efficiency and utilization ratio. Meanwhile, the flow guide cone is arranged at the source position where the gas enters, and the guide effect is not influenced by the incoming flow pressure.

Description

Heat and moisture exchange filter

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a heat and moisture exchange filter.

Background

At present, a large number of clinical operations need to bypass the nasal cavity to establish an artificial airway and perform mechanical ventilation.

Because the sterilization and temperature and humidity regulation functions of the nasal cavity are lost, the medical gas used for mechanical ventilation is drier and cooler in the shade, which easily causes the injury of the mucous membrane of the trachea and the bronchus, and further causes the transportation dysfunction of mucociliary in the trachea, and leads to pneumonia and atelectasis.

To simulate the function of the nasal cavity, a heat moisture exchange filter was used to heat and humidify the mechanically ventilated medical gas. The heat and moisture exchange filter can partially store heat and moisture in the exhaled air of the patient, heat and moisture are used for heating and humidifying newly-entered air, and a filtering membrane is used for filtering particles, viruses, sundry bacteria and the like in the air.

However, the conventional heat and moisture exchange filter is limited by the flowing direction of the air flow, and the sucked air is mostly concentrated at the central position of the filtering membrane, so that the peripheral positions of the filtering membrane cannot play a role in filtering, and the conventional heat and moisture exchange filter has poor adsorptivity and low utilization rate.

In summary, how to improve the utilization rate of the filtration membrane is an urgent problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a heat and moisture exchange filter, in which the air inlets of the upper cover and the lower cover are respectively provided with a flow guide cone, and the flow guide cones are used to guide the air flow in the heat and moisture exchange filter in a dispersing manner, so that the air flow is dispersed to the periphery of the filtering membrane, thereby improving the utilization rate of the filtering membrane.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a heat and moisture exchange filter comprises an upper shell, a lower shell and a filtering membrane arranged between the upper shell and the lower shell, wherein flow guide cones are arranged at an air inlet of the upper shell and an air outlet of the lower shell, and the small ends of the flow guide cones are far away from the filtering membrane;

the diversion cone is connected to the inner wall surface of the air inlet or the inner wall surface of the air outlet through a support rib.

Preferably, the axis of the deflector cone is collinear with the axis of the air inlet.

Preferably, the support ribs are uniformly distributed along the circumferential direction of the air inlet or the air outlet.

Preferably, the flow guide cone is connected with the air inlet or the air outlet through four support ribs.

Preferably, the inner surface of the upper shell and the inner surface of the lower shell are both provided with a plurality of radial reinforcing ribs.

Preferably, the reinforcing ribs are uniformly distributed along a circumferential direction of the upper case or the lower case.

Preferably, a height of one end of the reinforcing rib close to the axis of the upper case is greater than a height of one end of the reinforcing rib close to the inner wall surface of the upper case.

Preferably, the upper shell and the lower shell are both provided with closed rings, and after the upper shell and the lower shell are assembled, the closed rings of the upper shell and the closed rings of the lower shell respectively press the filtering membrane from the upper end and the lower end.

According to the heat and moisture exchange filter provided by the utility model, the flow guide cones are arranged at the air inlet of the upper shell and the air outlet of the lower shell, and the flow guide cones are guided and dispersed from the source position of the gas inlet, so that part of the gas is dispersed to the periphery of the filtering membrane, and the adsorption rate and the utilization rate of the filtering membrane are improved.

Meanwhile, the flow guide cone is arranged at the source position where the gas enters, and the guide effect is not influenced by the incoming flow pressure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is an exploded view of an embodiment of a heat moisture exchange filter according to the present invention;

FIG. 2 is a schematic cross-sectional view of the heat and moisture exchange filter of FIG. 1;

FIG. 3 is a schematic structural view of the upper shell of FIG. 1;

FIG. 4 is a structural schematic view of the lower case of FIG. 1;

fig. 5 is a schematic view of the principle of the guided partial flow of the hme filter.

In fig. 1-5:

1 is an upper shell, 11 is a cover cap, 2 is a lower shell, 3 is a filtering membrane, 4 is a water absorbing medium, 5 is a flow guide cone, 6 is a support rib, 7 is a reinforcing rib and 8 is a closed ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the utility model is to provide a heat and moisture exchange filter, wherein the air inlet of the upper cover and the air outlet of the lower cover are both provided with a flow guide cone, and the flow guide cones are used for dispersing and guiding the air flow in the heat and moisture exchange filter to the periphery of the filtering membrane, so that the utilization rate of the filtering membrane is improved.

Referring to fig. 1-5, fig. 1 is an exploded view of an embodiment of a heat moisture exchange filter according to the present invention; FIG. 2 is a schematic cross-sectional view of the heat and moisture exchange filter of FIG. 1; FIG. 3 is a schematic structural view of the upper shell of FIG. 1; FIG. 4 is a structural schematic view of the lower case of FIG. 1; fig. 5 is a schematic view of the principle of the guided partial flow of the hme filter.

The utility model provides a heat and moisture exchange filter, which comprises an upper shell 1, a lower shell 2 and a filtering membrane 3 arranged between the upper shell 1 and the lower shell 2, wherein flow guide cones 5 are arranged at an air inlet of the upper shell 1 and an air outlet of the lower shell 2, and the small ends of the flow guide cones 5 are far away from the filtering membrane 3; the diversion cone 5 is connected to the inner wall surface of the air inlet or the inner wall surface of the air outlet through a support rib 6.

Referring to fig. 1, an upper shell 1 and a lower shell 2 jointly form a shell of the heat and moisture exchange filter, and a filtering membrane 3 for filtering particles, viruses and infectious microbes in air is arranged between the upper shell 1 and the lower shell 2; in order to ensure the moisture-retaining capacity of the heat and moisture exchange filter, a water-absorbing medium 4 for absorbing water vapor in the exhaled air of the patient to moisten the incoming air flow is usually arranged in the shell.

The types, sizes and the like of the filter membrane 3 and the water absorbing medium 4 are determined according to actual production requirements, and are not described in detail herein.

In order to facilitate the detection of the gas exhaled by the patient, the upper shell 1 is provided with a collection port and a cap 11 for sealing the collection port, and the structures, shapes and sizes of the collection port and the cap 11 are determined according to the needs of actual production by referring to the prior art, and are not described herein again.

The flow guiding cone 5 is a nearly conical body with a smooth surface, please refer to fig. 5, the flow guiding cones 5 are respectively arranged at the air inlet of the upper shell 1 and the air outlet of the lower shell 2, the air flow entering from the air inlet is dispersed to the periphery of the upper shell 1 after passing through the flow guiding cones 5, then enters the lower shell 2 after passing through the periphery of the filtering membrane 3, and finally flows out from the air outlet of the lower shell 2.

The diversion cone 5 is connected to the inner wall surface of the air inlet/air outlet through a support rib 6, one end of the support rib 6 is connected with the inner wall surface of the air inlet/air outlet, and the other end of the support rib 6 is connected with the outer wall surface of the diversion cone 5.

The specific number and distribution of the support ribs 6 are determined according to the actual production requirements, and preferably, the support ribs 6 can be uniformly distributed along the circumferential direction of the air inlet or the air outlet.

In order to enhance the connection strength between the guide cone 5 and the inner wall surface of the air inlet/outlet, preferably, the guide cone 5 may be connected to the inner wall surface of the air inlet/outlet through at least three support ribs 6, so as to enhance the structural stability of the guide cone 5 with the upper shell 1 and the lower shell 2.

In one embodiment, referring to fig. 3 and 4, the guiding cone 5 is connected to the air inlet or the air outlet through four supporting ribs 6.

In this embodiment, set up water conservancy diversion awl 5 in the air inlet of epitheca 1 and the air outlet department of inferior valve 2, lead the dispersion to it from the source position that gaseous got into for some gas disperses to filtration membrane 3 position all around, has improved filtration membrane 3's adsorption efficiency and utilization ratio.

Meanwhile, the flow guide cone 5 is arranged at the source position where the gas enters, and the guide effect is not influenced by the incoming flow pressure.

Preferably, the axis of the deflector cone 5 and the axis of the air inlet may be arranged in a line, so that the air flow dispersed to each direction by the deflector cone 5 is relatively uniform.

On the basis of the above embodiment, considering that the upper casing 1 and the lower casing 2 bear larger pressure during the particulate matter test of the heat and moisture exchange filter, a plurality of radial reinforcing ribs 7 may be arranged on both the inner surface of the upper casing 1 and the inner surface of the lower casing 2.

The specific number, shape and size of the reinforcing ribs 7 are determined according to the structural strength requirement of the shell in actual production, and are not described in detail herein.

Preferably, the flow guide cone 5, the support ribs 6, the reinforcing ribs 7 and the upper shell 1 or the lower shell 2 corresponding to the flow guide cone can be arranged to form an integral structure, and the integral structure is integrally formed in an injection molding mode so as to reduce production and processing costs.

In this embodiment, through set up a plurality of strengthening ribs 7 in epitheca 1 and inferior valve 2, strengthened the structural strength and the bearing capacity of epitheca 1 and inferior valve 2, avoided the casing to take place extrusion deformation even collapse in particulate matter test.

Preferably, the reinforcing ribs 7 may be provided to be uniformly distributed in the circumferential direction of the upper case 1 or the lower case 2, so that the structural strength is relatively uniform throughout the upper case 1 or the lower case 2.

Preferably, referring to fig. 3 and 4, the height of one end of the reinforcing rib 7 near the axis of the upper case 1 is greater than the height of one end of the reinforcing rib 7 near the inner wall surface of the upper case 1.

On the basis of the above embodiment, in order to avoid the axial displacement of the filtering membrane 3, please refer to fig. 3 and 4, the closed rings 8 are respectively arranged in the upper casing 1 and the lower casing 2, and after the upper casing 1 and the lower casing 2 are assembled, the closed rings 8 of the upper casing 1 and the closed rings 8 of the lower casing 2 respectively press the filtering membrane 3 from the upper end and the lower end.

Referring to figure 2, relatively sealed gas passages are formed in the closed loop 8 so that both the device inlet gas and the patient exhalation gas pass through the filter membrane 3 to reduce contamination of the device by the patient exhalation gas and infection of the patient himself by the device inlet gas.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The heat and moisture exchange filter provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A heat and moisture exchange filter comprises an upper shell (1), a lower shell (2) and a filtering membrane (3) arranged between the upper shell (1) and the lower shell (2), and is characterized in that a flow guide cone (5) is arranged at each of an air inlet of the upper shell (1) and an air outlet of the lower shell (2), and the small end of the flow guide cone (5) is far away from the filtering membrane (3);

the diversion cone (5) is connected to the inner wall surface of the air inlet or the inner wall surface of the air outlet through a support rib (6).

2. The hme filter of claim 1, characterized in that the axis of the deflector cone (5) is collinear with the axis of the air inlet.

3. The hme filter of claim 1, characterized in that the support ribs (6) are evenly distributed in the circumferential direction of the inlet or outlet.

4. The hme filter of claim 3, characterized in that the guide cone (5) is connected to the air inlet or the air outlet via four support ribs (6).

5. Heat and moisture exchange filter according to any of claims 1-4, characterised in that the inner surface of the upper shell (1) and the inner surface of the lower shell (2) are provided with several radial ribs (7).

6. Heat and moisture exchange filter according to claim 5, characterised in that said reinforcing ribs (7) are evenly distributed in the circumferential direction of said upper shell (1) or said lower shell (2).

7. The hme filter of claim 5, characterized in that the height of one end of the rib (7) near the axis of the upper casing (1) is greater than the height of one end of the rib (7) near the inner wall surface of the upper casing (1).

8. Heat and moisture exchange filter according to any of claims 1-4, characterised in that a closed ring (8) is provided in both the upper casing (1) and the lower casing (2), and when the upper casing (1) and the lower casing (2) are assembled, the closed ring (8) of the upper casing (1) and the closed ring (8) of the lower casing (2) press the filter membrane (3) from the upper and lower ends, respectively.