Disposable anesthetic gas absorber

Abstract

A disposable anesthetic gas adsorber comprises an upper cover (1), a lower seat (2), an air inlet packaging cover (3) and an air outlet packaging cover (4), wherein the upper cover and the lower seat are connected by a clamping structure, and the joint surface of the two is sealed by an outer sealing ring (6); a spacer ring (9) is clamped in the lower seat and on the outer side of the air outlet pipe (5), and the lower seat forms an inner activated carbon installation area (11) and an outer activated carbon installation area (12) through the spacer ring; an elastic filter plate (13) is mounted on the upper end of the air outlet pipe, and the elastic filter plate (13) is provided with an air outlet hole (14); a gas distributor (15) is clamped in the spacer ring (9), and the outer side edge of the clamping groove of the gas distributor (15) and the spacer ring (9) are sealed by an inner sealing ring (16), and the outer side of the gas distributor (15) is provided with an air inlet hole (17); a plurality of pressure plates (18) are provided on the inner side of the upper cover (1) to press the gas distributor (2). The present invention has a simple structure and is easy to install.

Description

Technical Field

[0001] The invention relates to a medical device accessory, in particular to an anesthesia machine gas purifier, specifically to a disposable anesthesia gas adsorber. Background Art

[0002] As we all know, most of the anesthetic gas generated during the use of the anesthesia machine enters the mouth of the anesthetized person, but some of the gas will still escape during the generation of the anesthetic gas, and must be collected and purified before it can be discharged, otherwise the discharged gas will cause harm to medical staff. The usual purification method is to use activated carbon for adsorption. Through the adsorption of activated carbon, the anesthetic gas loses its activity and is converted into oxygen and carbon dioxide for safe discharge. The use of disposable anesthetic gas adsorbers can achieve an absorption rate of more than 99% of the anesthetic agent in the anesthetic tail gas, so it is widely used.

[0003] As far as the applicant knows, in order to ensure air tightness during assembly, conventional anesthetic gas adsorbers all use ABS adhesive to connect gas path components, which is very inconvenient to install. In addition, the density of activated carbon varies with the manufacturing process, and the volume of activated carbon of the same weight is different. However, the weight of activated carbon filled in the adsorber is fixed, so the volume of the inner cavity of the adsorber must be adjustable to adapt to the change of the volume of activated carbon. Summary of the invention

[0004] The purpose of the present invention is to design a disposable anesthetic gas adsorber which is easy to connect and can properly adjust the volume of the activated carbon installation cavity in order to solve the problems of inconvenient installation of existing anesthetic gas adsorbers and difficulty in adapting to changes in the volume of activated carbon.

[0005] The technical solution of the present invention is:

[0006] A disposable anesthetic gas adsorber, comprising an upper cover 1, a lower seat 2, an air inlet packaging cover 3 and an air outlet packaging cover 4, wherein the air inlet packaging cover 3 is mounted on the air inlet end of the upper cover 1, and the air outlet packaging cover 4 is plugged onto the air outlet of an air outlet pipe 5 at the center of the lower seat 2, wherein the upper cover 1 and the lower seat 2 are connected via a clamping structure, and the joint surface of the two is sealed via an outer sealing ring 6; a spacer ring 9 is clamped in the middle of the lower seat 2 and on the outer side of the air outlet pipe 5, an inner activated carbon installation area 11 is formed between the air outlet pipe 5 and the spacer ring 9, and an outer activated carbon installation area 12 is formed between the spacer ring 9 and the inner wall of the lower seat 2; an elastic filter plate 13 is mounted on the upper end of the air outlet pipe 5, and the wing plate portion of the elastic filter plate 13 just covers the inner activated carbon installation area 1 1 is to limit the movement of activated carbon, and the wing plate part of the elastic filter plate 13 is provided with an air outlet 14; a gas distributor 15 is clamped on the spacer ring 9, and the inner side edge of the clamping groove of the gas distributor 15 is pressed on the outer circle of the elastic filter plate 13 to achieve axial compensation of the elastic filter plate 13, and the outer side edge of the clamping groove of the gas distributor 15 and the spacer ring 9 are sealed by an inner sealing ring 16 to prevent the anesthetic gas from directly entering the inner activated carbon installation area 11 without purification. The outer wing plate of the gas distributor 15 is pressed on the upper part of the outer activated carbon installation area 12, and an air inlet 17 for the anesthetic gas to enter is provided on the outer wing plate of the gas distributor 15; a plurality of pressure plates 18 for pressing the gas distributor 2 are integrally connected to the inner side of the upper cover 1 to achieve axial positioning of the gas distributor.

[0007] The clamping structure is composed of a clamping claw 7 connected to the lower part of the upper cover 1 and a clamping groove located on the inner circle of the lower seat 2.

[0008] The main body of the outer sealing ring 6 is clamped in the sealing groove 8 of the upper cover 1 .

[0009] The lower end of the spacer ring 9 is inserted into the clamping seat 10 at the bottom of the lower seat 2.

[0010] The gas separator 15 is composed of a cover body part and a wing plate. Anesthetic gas cannot pass through the cover body part. The wing plate part is provided with an air inlet hole for the anesthetic gas to enter. A slot for inserting the upper end of the spacer ring is provided at the connection position of the cover body part and the wing plate, and the anesthetic gas inlet and the purified gas outlet are separated by an inner sealing ring installed at the upper end of the spacer ring.

[0011] The gas distributor 15 is in a spherical cap structure so as to form a purified gas channel in the spherical cap portion.

[0012] The air outlet holes 14 and the air inlet holes 17 are arranged in multiple rings with different diameters.

[0013] The outer ring of the elastic filter plate 13 is provided with an elastic strip 19, which abuts against the inner side of the slot of the gas distributor 15 to meet the compaction requirements of activated carbon of different volumes.

[0014] Beneficial effects of the present invention:

[0015] The gas path components of the anesthesia gas adsorber of the present invention are connected and installed by a plastic elastic hook, with an O-shaped sealing ring in the middle for sealing, thus avoiding the use of glue for bonding, which is quick, convenient and pollution-free.

[0016] The present invention designs a plastic spring on the filter plate, so that the filter plate can be adjusted up and down, thereby ensuring that the activated carbon fills the entire cavity without making a flowing sound.

[0017] The invention has the advantages of simple structure, convenient assembly, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of the present invention.

[0019] Figure 2 yes Figure 1 AA cross-sectional view (reflecting the shape of the air inlet and outlet).

[0020] Figure 3 Schematic diagram of the airflow path of anesthetic gas in the adsorber of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-3 shown.

[0023] A disposable anesthetic gas adsorber is used in conjunction with a gas anesthesia machine. All parts are injection molded. It includes an upper cover 1, a lower seat 2, an air inlet packaging cover 3 and an air outlet packaging cover 4. The air inlet packaging cover 3 is installed on the air inlet end of the upper cover 1, and the air outlet packaging cover 4 is plugged onto the air outlet of the air outlet pipe 5 in the center of the lower seat 2. The air inlet packaging cover 3 and the air outlet packaging cover 4 are all removed when in use, so they should be sealed and connected with the corresponding parts when leaving the factory. The upper cover 1 and the lower seat 2 are connected by a clamping structure. The clamping structure can be designed and manufactured by itself, or it can adopt the structure of the present invention. It consists of a claw 7 connected to the lower part of the upper cover 1 and a clamping groove located on the inner ring of the lower seat 2. The joint surface of the upper cover 1 and the lower seat 2 is sealed by an outer sealing ring 6. The main body of the outer sealing ring 6 is clamped in the sealing groove 8 of the upper cover 1. Figure 1As shown; in the lower seat 2, the outer side of the air outlet pipe 5 (injection molded integrally with the lower seat) is clamped with a spacer ring 9, that is, the lower end of the spacer ring 9 is inserted into the clamping seat 10 at the bottom of the lower seat 2, an inner activated carbon installation area 11 is formed between the air outlet pipe 5 and the spacer ring 9, and an outer activated carbon installation area 12 is formed between the spacer ring 9 and the inner wall of the lower seat 2; an elastic filter plate 13 is set at the upper end of the air outlet pipe 5, and the wing plate part of the elastic filter plate 13 just covers the upper part of the inner activated carbon installation area 11 to limit To prevent the movement of activated carbon, the wing plate part of the elastic filter plate 13 is provided with an air outlet 14; a gas separator 15 is mounted on the spacer ring 9, and the gas separator 15 is composed of a cover body part and a wing plate of a spherical crown structure. Anesthetic gas cannot pass through the cover body part, and the wing plate part is provided with an air inlet for the anesthetic gas to enter. A slot for inserting the upper end of the spacer ring is provided at the connecting position of the cover body part and the wing plate, and the anesthetic gas inlet and the purified gas outlet are separated by an inner sealing ring installed at the upper end of the spacer ring. The inner side edge of the slot of the gas distributor head 15 is pressed against the outer circle of the elastic filter plate 13 to achieve axial compensation of the elastic filter plate 13. The outer side edge of the slot of the gas distributor head 15 is sealed with the spacer ring 9 through the inner sealing ring 16 to prevent the anesthetic gas from directly entering the inner activated carbon installation area 11 without purification. The outer wing plate of the gas distributor head 15 is pressed on the upper part of the outer activated carbon installation area 12. An air inlet 17 for the anesthetic gas to enter is provided on the outer wing plate of the gas distributor head 15. A plurality of pressure plates 18 for pressing the gas distributor head 2 are integrally connected to the inner side of the upper cover 1 to achieve axial positioning of the gas distributor head. The air outlet 14 and the air inlet 17 are arranged in multiple sections of rings with different diameters, such as Figure 2 The outer ring of the elastic filter plate 13 is provided with an elastic strip 19, and the elastic strip 19 abuts against the inner side of the slot of the gas distributor 15 to meet the compaction requirements of activated carbon of different volumes.

[0024] During specific implementation, an elastic filter plate with elastic strips may also be installed on the upper part of the outer activated carbon installation area 12 to adapt to the change in volume.

[0025] The working principle of the present invention is as follows Figure 3 shown.

[0026] To use the dryer, first remove the air inlet packaging cover 3 and the air outlet packaging cover 4, and seal the air inlet end of the upper cover 1 with the exhaust port of the anesthesia machine. The anesthetic gas enters the adsorber from the inlet end of the upper cover 1, and enters the outer activated carbon installation area 12 through the air inlet hole 17 on the wing plate of the gas distributor 15 for purification. After being further purified, the gas flows from the lower part of the partition ring 9 into the inner activated carbon installation area 11 for further purification. The purified gas enters the spherical crown part of the gas distributor 15 from the air outlet hole 14 on the wing plate outside the elastic filter plate 13, and is discharged from the adsorber from the middle air outlet pipe 5.

[0027] If the volume of the activated carbon is too small or too large during the installation or use process, the elastic strips on the elastic filter plate 13 use their elasticity to generate downward pressure to compress the activated carbon to prevent axial loosening and noise.

[0028] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A disposable anesthetic gas adsorber, comprising an upper cover (1), a lower seat (2), an air inlet packaging cover (3) and an air outlet packaging cover (4), wherein the air inlet packaging cover (3) is mounted on the air inlet end of the upper cover (1), and the air outlet packaging cover (4) is plugged onto the air outlet of an air outlet pipe (5) at the center of the lower seat (2), wherein: The upper cover (1) and the lower seat (2) are connected by a snap-fit ​​structure, and the joint surface of the two is sealed by an external sealing ring (6); a spacer ring (9) is snap-fitted in the lower seat (2) and on the outer side of the air outlet pipe (5); an inner activated carbon installation area (11) is formed between the air outlet pipe (5) and the spacer ring (9), and an outer activated carbon installation area (12) is formed between the spacer ring (9) and the inner wall of the lower seat (2); an elastic filter plate (13) is mounted on the upper end of the air outlet pipe (5); the wing plate portion of the elastic filter plate (13) just covers the upper part of the inner activated carbon installation area (11) to limit the movement of the activated carbon, and the wing plate portion of the elastic filter plate (13) is provided with an air outlet hole (14); a gas distributor (15) is snap-fitted on the spacer ring (9), and the inner side edge of the slot of the gas distributor (15) is pressed against the inner side edge of the slot of the elastic filter plate (13). The outer circle is provided with a plurality of pressure plates (18) for pressing the gas distributor (15) and the spacer ring (9) so as to realize axial compensation of the elastic filter plate (13). The outer side edge of the slot of the gas distributor head (15) and the spacer ring (9) are sealed by an inner sealing ring (16) to prevent the anesthetic gas from directly entering the inner activated carbon installation area (11) without purification. The outer wing plate of the gas distributor head (15) is pressed on the upper part of the outer activated carbon installation area (12). The outer wing plate of the gas distributor head (15) is provided with an air inlet (17) for the anesthetic gas to enter. The inner side of the upper cover (1) is integrally connected with a plurality of pressure plates (18) for pressing the gas distributor head (15) so as to realize axial positioning of the gas distributor head. The outer circle of the elastic filter plate (13) is provided with an elastic strip (19), which is against the inner side edge of the slot of the gas distributor head (15) to meet the compression requirements of activated carbon of different volumes.

2. The disposable anesthetic gas adsorber according to claim 1, characterized in that The clamping structure is composed of a clamping claw (7) connected to the lower part of the upper cover (1) and a clamping groove located on the inner ring of the lower seat (2).

3. The disposable anesthetic gas adsorber according to claim 1, characterized in that The main body of the outer sealing ring (6) is clamped in the sealing groove (8) of the upper cover (1).

4. The disposable anesthetic gas adsorber according to claim 1, characterized in that The lower end of the spacer ring (9) is inserted into a clamping seat (10) at the bottom of the lower seat (2).

5. The disposable anesthetic gas adsorber according to claim 1, characterized in that The gas separator (15) is composed of a cover body part and a wing plate, the anesthetic gas cannot pass through the cover body part, the wing plate part is provided with an air inlet hole for the anesthetic gas to enter, a slot for inserting the upper end of the spacer ring is provided at the connection position of the cover body part and the wing plate, and the anesthetic gas inlet and the purified gas outlet are separated by an inner sealing ring installed at the upper end of the spacer ring.

6. The disposable anesthetic gas adsorber according to claim 1 or 5, characterized in that The gas distributor (15) is in a spherical crown structure so that a purified gas channel is formed in the spherical crown portion.

7. The disposable anesthetic gas adsorber according to claim 1, characterized in that The air outlet holes (14) and the air inlet holes (17) are arranged in a multi-section ring shape with different diameters.

Images