Preprocessor for mixed anesthetic gas

Abstract

The invention relates to the field of anesthesia, and discloses a mixed anesthetic gas pretreatment device which comprises a cylinder, and a gas injection pipe and an output pipe are installed outside the cylinder. A combined filter layer is mounted on the outer peripheral wall of the cylindrical filter part; a plurality of partition plate assemblies are mounted on the inner wall of the cylinder; an air passing cylinder is mounted in the cylindrical filter part; an air cavity is formed in the air passing cylinder, a plurality of air passing holes are formed in the outer wall of the air passing cylinder, and a telescopic air injection structure is mounted in the air passing cylinder; the telescopic gas injection structure comprises a fixed gas cylinder and a movable gas cylinder, the fixed gas cylinder is communicated with the gas injection pipe, and the movable gas cylinder can move relative to the fixed gas cylinder so as to adjust the gas output position on the movable gas cylinder to directly face the interiors of different filtering cavities; a plurality of annular cavities are formed in the inner wall of the barrel. According to the anesthetic gas filtering device, when the gas shuttles among the different filtering cavities, the gas repeatedly penetrates through the barrel-shaped filtering piece, one barrel-shaped filtering piece is adopted for achieving multiple times of filtering of the anesthetic gas, and the filtering effect and the utilization rate of the barrel-shaped filtering piece are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of anesthesia, and particularly relates to a pre-processor for a mixed anesthetic gas. Background Art

[0002] Different types of anesthetic gases usually cannot be used alone and need to be used in combination with different anesthetic gases to achieve the best anesthetic effect. During the mixing process of anesthetic drugs, floating dust and bacteria in the air may enter the anesthetic gas. Therefore, during anesthesia, the anesthetic gas usually needs to be purified and filtered before being supplied to the human body for absorption. Currently, the anesthetic gas is generally filtered through a filter mesh. The anesthetic gas after simple purification and filtration may still contain some harmful substances, and the cleanliness of the anesthetic gas cannot be guaranteed.

[0003] To solve the above problems, the prior art uses the method of setting multiple filter meshes in the purification device and using different filtering media for different filter meshes to achieve the purpose of improving the purification effect. Generally, a silver ion filter mesh is used to inactivate bacteria in the gas, and an activated carbon filter mesh is used to remove dust and impurities in the anesthetic gas;

[0004] Due to factors such as the precipitation of impurities and improper storage of anesthetic gas, the impurity content in a unit volume of anesthetic gas is uncertain. If the impurity content is relatively high and the impurities are not completely purified after one round of filtration, it needs to be re-injected into the purification device, otherwise harmful substances will be inhaled by the human body. If the impurity content is relatively low, all impurities have been filtered before the multiple filtration operations are completed, and the filtered gas is not supplied to the human body in time, resulting in surgical delays. Therefore, the prior art has the problem that due to the uncertain impurity content, it is impossible to simultaneously ensure complete purification and maximize the use of the filtration process while improving the filtration efficiency. Summary of the Invention

[0005] Therefore, the present invention provides a pre-processor for a mixed anesthetic gas, which effectively solves the problem in the prior art that due to the uncertain impurity content, it is impossible to simultaneously ensure complete purification and maximize the use of the filtration process while improving the filtration efficiency.

[0006] To solve the above technical problems, the present invention specifically provides the following technical solution: A pre-processor for a mixed anesthetic gas, including a cylinder body, and an injection pipe and an output pipe are respectively installed on the side walls of the cylinder body near both ends;

[0007] A cylindrical filter element is installed inside the cylinder body, a combined filter layer is installed on the outer peripheral wall of the cylindrical filter element, and a plurality of partition assemblies are installed on the inner wall of the cylinder body at equal intervals along the length direction. The outer periphery of the partition assembly fits with the inner wall of the cylindrical filter element to divide the interior of the cylindrical filter element into a plurality of filter chambers;

[0008] An air passage cylinder is installed inside the cylindrical filter element. The air passage cylinder penetrates through the partition assembly. An air cavity is formed inside the air passage cylinder. A plurality of air holes are formed on the outer wall of the air passage cylinder. The air cavity is communicated with the filter cavity through the air holes;

[0009] A telescopic air injection structure is installed inside the air passage cylinder. The telescopic air injection structure includes a fixed air cylinder and a movable air cylinder which are sleeved with each other. The fixed air cylinder is communicated with the air injection pipe. The movable air cylinder is communicated with the air cavity;

[0010] Wherein, the movable air cylinder can move relative to the fixed air cylinder to adjust the position of gas output on the movable air cylinder to face different interiors of the filter cavities;

[0011] A plurality of annular cavities are equidistantly formed on the inner wall of the cylinder body in the height direction. The annular cavities respectively face and communicate with two adjacent filter cavities in the height direction;

[0012] Gas sequentially passes through the air injection pipe, the fixed air cylinder, the movable air cylinder, enters the air cavity, then passes through the air holes and enters one of the filter cavities. The gas passes through the previous filter cavity and enters the annular cavity, and then passes through the annular cavity and enters the latter filter cavity. Finally, it is discharged through the annular cavity at the bottom and the output pipe.

[0013] Further, a threaded bolt is arranged inside the fixed air cylinder. The threaded bolt penetrates through the top cover of the cylinder body. An activity bolt is connected to the end of the threaded bolt. An outer sleeve is threadedly assembled to the end of the threaded bolt away from the activity bolt;

[0014] Wherein, the threaded bolt is movably connected to the fixed air cylinder. The outer sleeve is movably connected to the movable air cylinder. The threaded bolt, the activity bolt and the outer sleeve are all located at the central position facing the air cavity.

[0015] Further, a first slot is formed at the end of the fixed air cylinder. A second slot is formed at the end of the movable air cylinder. The threaded bolt penetrates through the first slot;

[0016] A connecting bearing is connected to the outer peripheral side of the threaded bolt. The connecting bearing is installed in the first slot. A positioning groove seat is connected to the end of the outer sleeve. The positioning groove seat is installed in the second slot.

[0017] Further, the outer diameters of the fixed air cylinder and the movable air cylinder are both smaller than the inner diameter of the air passage cylinder;

[0018] A blocking column is connected to the bottom of the movable air cylinder. The blocking column is arranged along the length direction of the outer sleeve. The outer wall of the blocking column is in sliding contact with the inner wall of the air passage cylinder;

[0019] The bottom of the air pump is connected with a limit bolt, a limit hole groove is arranged in the blocking column, and the end of the limit bolt is slidably arranged in the limit hole groove;

[0020] An annular blocking seat is sleeved outside the movable air cylinder. The inner wall of the annular blocking seat is connected with the movable air cylinder, and its outer wall is in sliding contact with the inner wall of the air pump. The area in the air pump between the annular blocking seat and the blocking column faces at least one of the air holes.

[0021] Further, the annular cavity at the bottom is communicated with the output pipe.

[0022] Further, the cylindrical filter element includes an annular frame body and an arc-shaped frame body which are arranged in sequence from top to bottom;

[0023] The inner diameters and outer diameters of the annular frame body and the arc-shaped frame body are the same. The arc-shaped frame body is provided with a notch, a door-shaped frame is connected to the notch, the bottom of the door-shaped frame is connected to both ends of the notch, and the height of the door-shaped frame is greater than half of the distance between the annular frame body and the arc-shaped frame body;

[0024] Wherein, the top end of the door-shaped frame is connected to the annular frame body through a connecting arc plate.

[0025] Further, the combined filter layer is installed between the annular frame body and the arc-shaped frame body. The combined filter layer forms a cylindrical shape, and its side wall is formed with a first opening and a second opening which are communicated up and down. The width of the first opening is smaller than the width of the second opening;

[0026] The edge part of the second opening is connected to the side of the door-shaped frame, the edge part of the first opening is connected to both sides of the connecting arc plate, the top of the combined filter layer is connected to the annular frame body, and its bottom is connected to the arc-shaped frame body.

[0027] Further, the partition plate assembly includes a horizontal partition plate. A sealing arc plate is connected to the side of the horizontal partition plate. The sealing arc plate is clamped in the door-shaped frame, and the outer wall of the horizontal partition plate fits with the inner wall of the combined filter layer;

[0028] The annular frame body, the arc-shaped frame body, the sealing arc plate and the combined filter layer are combined to form a cylindrical structure;

[0029] The air pump penetrates through the horizontal partition plate. A central groove for the air pump to pass through is opened on the horizontal partition plate. A clamping cover is connected to the top end of the air pump. The clamping cover is connected to the outer wall of the fixed air cylinder. The clamping cover is clamped on the annular frame body. The end of the air pump extends into the filter cavity at the bottom, and the air hole is arranged on the outer wall of the air pump far away from the filter cavity at the bottom.

[0030] Further, a ring-shaped card slot is provided at the bottom inside the cylinder body, and the bottom of the arc-shaped frame body and the sealing arc plate are clamped into the ring-shaped card slot.

[0031] Further, the combined filter layer includes a silver ion layer, a cold catalyst layer, a HEPA layer, and an activated carbon layer arranged in sequence from the inner layer to the outer layer;

[0032] The silver ion layer, the cold catalyst layer, the HEPA layer, and the activated carbon layer are laminated to form the combined filter layer.

[0033] The present invention has the following beneficial effects compared with the prior art:

[0034] In the present invention, when the gas shuttles between different filter chambers, it repeatedly passes through the cylindrical filter element. By using one cylindrical filter element, multiple filtrations of the anesthetic gas are realized, improving the filtration effect and the utilization rate of the cylindrical filter element;

[0035] Further, by adjusting the relative position of the movable air cylinder, the position of the gas output on the movable air cylinder can be adjusted to face the inside of different filter chambers, thereby adjusting the number of times the anesthetic gas shuttles back and forth through the filter chambers. If the impurity content is less, the number of times the anesthetic gas shuttles back and forth through the filter chambers is reduced to improve the gas filtration efficiency. If the impurity content is more, the number of times the anesthetic gas shuttles back and forth through the filter chambers is increased to ensure complete purification of the impurities. For the mixed anesthetic gas with less impurity content, the filtration times can be reduced, improving the filtration efficiency of the anesthetic gas and maximizing the utilization rate of the filtration process on the basis of improving the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0037] Figure 1 It is a schematic structural diagram of a pre-processor for a mixed anesthetic gas provided by an embodiment of the present invention;

[0038] Figure 2 It is a top view structural diagram of a pre-processor for a mixed anesthetic gas provided by an embodiment of the present invention;

[0039] Figure 3 is Figure 2 a three-dimensional cross-sectional view in the A-A direction of

[0040] Figure 4 is Figure 2Cross-sectional view of plane A-A;

[0041] Figure 5 Cross-sectional view of the telescopic gas injection structure in the embodiment of the present invention;

[0042] Figure 6 Cross-sectional view of the cylindrical structure in the embodiment of the present invention;

[0043] Figure 7 Schematic structural diagram of the cylindrical structure removing the partition assembly in the embodiment of the present invention;

[0044] Figure 8 Schematic structural diagram of the cylindrical filter element in the embodiment of the present invention;

[0045] Figure 9 Schematic structural diagram of installing the partition assembly on the cylindrical filter element in the embodiment of the present invention;

[0046] Figure 10 Schematic three-dimensional structural diagram of the combined filter layer in the embodiment of the present invention;

[0047] Figure 11 Cross-sectional structural diagram of the combined filter layer in the embodiment of the present invention.

[0048] The reference numerals in the figure respectively represent the following:

[0049] 1 - Cylinder body; 2 - Gas injection pipe; 3 - Output pipe; 4 - Cylindrical filter element; 5 - Air passing cylinder; 6 - Telescopic gas injection structure; 7 - Combined filter layer; 8 - Partition assembly; 9 - Filter cavity; 10 - Air cavity; 11 - Air passing hole; 12 - Annular cavity; 13 - Threaded bolt; 14 - Movable bolt; 15 - Outer sleeve; 16 - Annular card slot; 17 - Clamping cover;

[0050] 41 - Ring-shaped frame body; 42 - Arc-shaped frame body; 43 - Notch; 44 - Door-shaped frame; 46 - Connecting arc plate;

[0051] 61 - Fixed air cylinder; 62 - Movable air cylinder; 63 - First slotted opening; 64 - Second slotted opening; 65 - Connecting bearing; 66 - Positioning groove seat; 67 - Blocking column; 68 - Limit bolt; 69 - Limit hole groove; 610 - Annular blocking seat;

[0052] 71 - Silver ion layer; 72 - Cold catalyst layer; 73 - HEPA layer; 74 - Activated carbon layer; 75 - First opening; 76 - Second opening;

[0053] 81 - Horizontal partition; 82 - Sealing arc plate; 83 - Central groove. Specific implementation manner

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the present invention provides a pre-processor for a mixed anesthetic gas, including a cylinder body 1. Injection pipes 2 and output pipes 3 are respectively installed on the side walls of the cylinder body 1 near both ends. The anesthetic gas is injected from the injection pipe 2 and discharged from the output pipe 3.

[0056] Among them, in order to facilitate the detachable of the cylindrical filter element 4, both the injection pipe 2 and the output pipe 3 in the present invention are set as detachable structures.

[0057] A cylindrical filter element 4 is installed in the cylinder body 1. A combined filter layer 7 is installed on the outer peripheral wall of the cylindrical filter element 4. A plurality of partition assemblies 8 are installed on the inner wall of the cylinder body 1 at equal intervals along the length direction. The outer periphery of the partition assembly 8 fits with the inner wall of the cylindrical filter element 4 to divide the interior of the cylindrical filter element 4 into several filter chambers 9.

[0058] An air passing cylinder 5 is installed in the cylindrical filter element 4. The air passing cylinder 5 penetrates through the partition assembly 8. An air cavity 10 is formed in the air passing cylinder 5. A plurality of air passing holes 11 are opened on the outer wall of the air passing cylinder 5. The air cavity 10 is communicated with the filter chamber 9 through the air passing holes 11;

[0059] A telescopic injection structure 6 is installed in the air passing cylinder 5. The telescopic injection structure 6 includes a fixed air cylinder 61 and a movable air cylinder 62 that are sleeved with each other. The fixed air cylinder 61 is communicated with the injection pipe 2, and the movable air cylinder 62 is communicated with the air cavity 10;

[0060] Among them, the movable air cylinder 62 can move relative to the fixed air cylinder 61 to adjust the position of gas output on the movable air cylinder 62 to be directly opposite to the inside of different filter chambers 9. A plurality of annular cavities 12 are opened on the inner wall of the cylinder body 1 at equal intervals along the height direction. The annular cavities 12 are respectively directly opposite to and communicated with two adjacent filter chambers 9 along the height direction. The annular cavity 12 at the bottom is communicated with the output pipe 3.

[0061] The gas sequentially passes through the injection pipe 2, the fixed air cylinder 61, the movable air cylinder 62, and enters the air cavity 10, and then passes through the air passing holes 11 into one of the filter chambers 9. The gas enters the annular cavity 12 through the previous filter chamber 9 and passes through the annular cavity 12 into the next filter chamber 9, and finally is discharged through the annular cavity 12 at the bottom and the output pipe 3.

[0062] In the present invention, when the gas shuttles between different filter chambers 9, it repeatedly passes through the cylindrical filter element 4. By using one cylindrical filter element 4, multiple filtrations of the anesthetic gas are achieved, improving the filtration effect and the utilization rate of the cylindrical filter element 4.

[0063] In addition, by adjusting the relative position of the movable air cylinder 62, the position of the gas output on the movable air cylinder 62 can be adjusted to face the inside of different filter chambers 9, thereby adjusting the number of times the anesthetic gas shuttles back and forth through the filter chamber 9. If the impurity content is low, the number of times the anesthetic gas shuttles back and forth through the filter chamber 9 is reduced to improve the gas filtration efficiency. If the impurity content is high, the number of times the anesthetic gas shuttles back and forth through the filter chamber 9 is increased to ensure complete purification of the impurities. For the mixed anesthetic gas with a low impurity content, the filtration times can be reduced, improving the filtration efficiency of the anesthetic gas and maximizing the utilization rate of the filtration process on the basis of improving the filtration efficiency.

[0064] In order to achieve the telescopic injection structure 6 to be telescopic, the present invention also makes the following designs. As Figure 5 shown, a threaded bolt 13 is arranged in the fixed air cylinder 61. The threaded bolt 13 penetrates through the top cover of the cylinder body 1. The end of the threaded bolt 13 is connected with a movable bolt 14, and an outer sleeve 15 is threadedly assembled at the end of the threaded bolt 13 away from the movable bolt 14.

[0065] Among them, the threaded bolt 13 is movably connected with the fixed air cylinder 61, the outer sleeve 15 is movably connected with the movable air cylinder 62, and the threaded bolt 13, the movable bolt 14, and the outer sleeve 15 are all located at the central position in the air chamber 10.

[0066] A first slot 63 is opened at the end of the fixed air cylinder 61, and a second slot 64 is opened at the end of the movable air cylinder 62. The threaded bolt 13 penetrates through the first slot 63.

[0067] A connecting bearing 65 is connected to the outer peripheral side of the threaded bolt 13. The connecting bearing 65 is installed in the first slot 63. A positioning groove seat 66 is connected to the end of the outer sleeve 15. The positioning groove seat 66 is installed in the second slot 64.

[0068] The outer diameters of the fixed air cylinder 61 and the movable air cylinder 62 are both smaller than the inner diameter of the air passing cylinder 5. A blocking column 67 is connected to the bottom of the movable air cylinder 62. The blocking column 67 is arranged along the length direction of the outer sleeve 15, and the outer wall of the blocking column 67 is in sliding contact with the inner wall of the air passing cylinder 5.

[0069] A limiting bolt 68 is connected to the bottom of the air passing cylinder 5. A limiting hole groove 69 is arranged in the blocking column 67, and the end of the limiting bolt 68 is slidably arranged in the limiting hole groove 69.

[0070] The movable air cylinder 62 is externally sleeved with an annular blocking seat 610. The inner wall of the annular blocking seat 610 is connected to the movable air cylinder 62, and its outer wall is in sliding contact with the inner wall of the air passing cylinder 5. The area in the air passing cylinder 5 between the annular blocking seat 610 and the blocking column 67 faces at least one air passing hole 11.

[0071] In the above embodiment, the connection between the connecting bearing 65 and the first slotted opening 63 is a movable connection, and the connection between the positioning groove seat 66 and the second slotted opening 64 is a fixed connection. When the movable bolt 14 is rotated, the threaded bolt 13 is driven to rotate. Due to the limiting effect of the limiting bolt 68 (where the limiting bolt 68 is a prismatic structure), the movable air cylinder 62 cannot rotate. Therefore, the outer sleeve 15 also cannot rotate. Under the rotational action of the threaded bolt 13, the outer sleeve 15 is gradually driven to move downward, driving the movable air cylinder 62 to move downward.

[0072] Suppose there are three filtering chambers 9. In the initial state, the anesthetic gas passes through the air holes at the bottom of the fixed air cylinder 61 and the movable air cylinder 62, enters the air chamber 10, and then passes through the air passing holes 11 from the air chamber 10 into the (from top to bottom) first filtering chamber 9. The anesthetic gas passes through the combined filter layer 7 under the action of air pressure and enters the first annular chamber 12, and then passes through the combined filter layer 7 from the first annular chamber 12 into the second filtering chamber 9, and then passes through the combined filter layer 7 into the second annular chamber 12. Part of the anesthetic gas entering the second annular chamber 12 can be directly discharged through the output pipe 3 connected to the annular chamber 12, and part passes through the combined filter layer 7 into the third filtering chamber 9, and then is discharged to the annular chamber 12 through the combined filter layer 7 and discharged through the output pipe 3. The entire process is filtered at most 5 times and at least 3 times. This situation is applicable to the filtering scenario with a large amount of impurities.

[0073] If the movable air cylinder 62 is adjusted downward into the second filtering chamber 9 (the air hole at the bottom of the movable air cylinder 62 faces the second filtering chamber 9), the anesthetic gas passes through the air holes at the bottom of the fixed air cylinder 61 and the movable air cylinder 62, enters the air chamber 10, and the gas passes through the air passing holes 11 from the air chamber 10 into the second filtering chamber 9, and then passes through the combined filter layer 7 into the second annular chamber 12. Part of the anesthetic gas entering the second annular chamber 12 can be directly discharged through the output pipe 3 connected to the annular chamber 12, and part passes through the combined filter layer 7 into the third filtering chamber 9, and then is discharged to the annular chamber 12 through the combined filter layer 7 and discharged through the output pipe 3. The entire filtering process of most of the anesthetic gas is filtered at most 3 times and at least 1 time. The filtering process becomes less, the gas transportation path becomes shorter, and the filtering efficiency is improved. This situation is applicable to the filtering scenario with a small amount of impurities.

[0074] The blocking column 67 can block the air passing cylinder 5 in the corresponding filtering cavity 9, preventing the anesthetic gas from escaping through other air passing holes 11 of the air passing cylinder 5 at the beginning. Taking three filtering cavities 9 as an example, the air passing cylinder 5 extends into the bottommost filtering cavity 9, and air passing holes 11 are arranged in the first and second filtering cavities 9. At the beginning, the blocking column 67 blocks the air passing holes 11 in the second filtering cavity 9, preventing the anesthetic gas from directly entering the second filtering cavity 9 from the air passing cylinder 5, resulting in a reduction in the filtering process and poor purification effect.

[0075] When the impurities in the anesthetic gas decrease, the movable air cylinder 62 can be moved into the second filtering cavity 9. The anesthetic gas starts to be filtered directly from the second filtering cavity 9, reducing the filtering process and accelerating the filtering and purification speed. The blocking column 67 also correspondingly moves into the third filtering cavity 9 and does not block the corresponding air passing holes 11.

[0076] The annular blocking seat 610 also plays a role in blocking the air passing holes 11. Taking three filtering cavities 9 as an example, the air hole at the bottom of the movable air cylinder 62 is directly opposite to the first filtering cavity 9. At this time, the blocking column 67 blocks the air passing holes 11 in the second filtering cavity 9, and the annular blocking seat 610 is located above the air passing holes 11 in the first filtering cavity 9. When the impurities in the anesthetic gas decrease, the movable air cylinder 62 can be moved into the second filtering cavity 9, and the anesthetic gas directly enters and is filtered from the second filtering cavity 9. At this time, the annular blocking seat 610 moves down with the movable air cylinder 62 and blocks the air passing holes 11 in the first filtering cavity 9, and the anesthetic gas can only enter the filtering cavity 9 through the air passing holes 11 in the second filtering cavity 9, preventing the anesthetic gas from entering the first filtering cavity 9, resulting in more filtering processes and a longer transportation path.

[0077] The combined filter layer 7 is installed on the outer wall of the circumferential side of the cylindrical filter element 4 in the present invention. Long-term filtering of the anesthetic gas may cause more impurities to adhere to the combined filter layer 7, resulting in a worse purification effect and a lower purification efficiency, and the cylindrical filter element 4 needs to be replaced. Therefore, the cylindrical filter element 4 is set as a detachable structure. The cylindrical filter element 4 of the present invention adopts the following preferred embodiments. As Figure 6 、 Figure 7 、 Figure 8 shown, the cylindrical filter element 4 includes an annular frame body 41 and an arc-shaped frame body 42 arranged in sequence from top to bottom;

[0078] The inner diameters and outer diameters of the annular frame body 41 and the arc-shaped frame body 42 are the same. The arc-shaped frame body 42 is provided with a notch 43, and a door-shaped frame 44 is connected to the notch 43. The bottom of the door-shaped frame 44 is connected to both ends of the notch 43, and the height of the door-shaped frame 44 is greater than half of the distance between the annular frame body 41 and the arc-shaped frame body 42. Among them, the top end of the door-shaped frame 44 is connected to the annular frame body 41 through a connecting arc plate 46.

[0079] Assume that in the actual application process, only two filter chambers 9 are formed. Then a partition assembly 8 needs to be installed at a position near the middle inside the cylindrical filter element 4. Since the annular chamber 12 at the bottom has a relatively large volume, the corresponding partition assembly 8 is installed at a position above the middle inside the cylindrical filter element 4. If three filter chambers 9 are formed, two partition assemblies 8 need to be installed. The partition assembly 8 corresponding to the top is installed at a position close to 2 / 3 of the height of the cylindrical filter element 4, and the top end of the portal frame 44 also extends to the position of 2 / 3 inside the cylindrical filter element 4 accordingly. Therefore, the top end of the portal frame 44 extends at least to the position of 1 / 2 between the annular frame body 41 and the arc-shaped frame body 42.

[0080] As Figure 10 shown, the combined filter layer 7 is installed between the annular frame body 41 and the arc-shaped frame body 42. The combined filter layer 7 forms a cylindrical shape, and its side wall is formed with a first opening 75 and a second opening 76 that communicate vertically. The width of the first opening 75 is smaller than the width of the second opening 76.

[0081] The edge part of the second opening 76 is connected to the side of the portal frame 44, and the edge parts of the first opening 75 are connected to both sides of the connecting arc plate 46. The top of the combined filter layer 7 is connected to the annular frame body 41, and its bottom is connected to the arc-shaped frame body 42. The above design ensures the airtight installation of the overall edge of the combined filter layer 7.

[0082] In the present invention, the partition assembly 8 adopts the following preferred embodiments. As Figure 9 shown, the partition assembly 8 includes a horizontal partition 81. A sealing arc plate 82 is connected to the side of the horizontal partition 81. The sealing arc plate 82 is clamped inside the portal frame 44, and the outer wall of the horizontal partition 81 fits with the inner wall of the combined filter layer 7.

[0083] The annular frame body 41, the arc-shaped frame body 42, the sealing arc plate 82, and the combined filter layer 7 are combined to form a cylindrical structure.

[0084] Among them, the sealing arc plate 82 can seal the portal frame 44, so that the gas in the filter chamber 9 can only enter the next filter chamber 9 through the annular chamber 12.

[0085] In the present invention, the cylindrical structure itself can be divided into two parts. The first part is the cylindrical filter element 4 and the combined filter layer 7, and the second part is the partition assembly 8. The first part and the second part are detachable. The connection between the first part and the second part is mainly achieved by the clamping between the sealing arc plate 82 and the door-shaped frame 44. Under the removal of external force, the second part can be separated from the first part. Since the first part is equipped with the combined filter layer 7, in practical applications, the first part needs to be replaced at regular intervals. The second part can be reused. After replacement, a new first part can be installed on the second part, and after forming a cylindrical structure, it can be used again. The above design can ensure the stability of the horizontal partition 81 based on the sealing arc plate 82 on the one hand (if the horizontal partition 81 is directly fixedly installed in the combined filter layer 7, there may be instability problems), and on the other hand, it is also convenient for disassembly and replacement.

[0086] The air passage cylinder 5 penetrates through the horizontal partition 81. A central groove 83 for the air passage cylinder 5 to pass through is opened on the horizontal partition 81. The top end of the air passage cylinder 5 is connected with a clamping cover 17. The clamping cover 17 is connected to the outer wall of the fixed air cylinder 61. The clamping cover 17 is clamped on the annular frame body 41. The end of the air passage cylinder 5 extends into the filtering cavity 9 at the bottom, and the air passage holes 11 are arranged on the outer wall of the air passage cylinder 5 far away from the bottom filtering cavity 9.

[0087] When installing the air passage cylinder 5, installing and clamping the clamping cover 17 on the annular frame body 41 can ensure the sealing state at the top of the filtering cavity 9. When it is necessary to disassemble the air passage cylinder 5, the fixed air cylinder 61 is disassembled, and the air passage cylinder 5 can be directly taken away from the cylinder body 1 through the clamping cover 17.

[0088] In order to realize the installation of the cylindrical filter element 4, the present invention makes the following design. A ring-shaped clamping groove 16 is opened at the bottom inside the cylinder body 1. The bottom of the arc-shaped frame body 42 and the sealing arc plate 82 are clamped into the ring-shaped clamping groove 16, and the arc-shaped frame body 42 and the sealing arc plate 82 can be directly removed from the ring-shaped clamping groove 16.

[0089] In the present invention, in order to ensure the purification effect, as Figure 11 shown, the combined filter layer 7 includes a silver ion layer 71, a cold catalyst layer 72, a HEPA layer 73, and an activated carbon layer 74 arranged in sequence from the inner layer to the outer layer. The silver ion layer 71, the cold catalyst layer 72, the HEPA layer 73, and the activated carbon layer 74 are pressed together to form the combined filter layer 7.

[0090] During the process of the anesthetic gas entering the annular cavity 12 from the filtering cavity 9 and the process of entering the filtering cavity 9 from the annular cavity 12, when passing through the silver ion layer 71, the bacteria inside the gas are inactivated. The cold catalyst layer 72 adsorbs and removes the inactivated bacteria. The HEPA layer 73 and the activated carbon layer 74 remove the dust and impurities in the anesthetic gas. Through the setting of multiple filter meshes, the bacteria and impurities contained in the anesthetic gas are removed before being inhaled by the patient.

[0091] Since there is a two-way filtering action in the present invention, in order to ensure further filtering effect, a cold catalyst layer 72 can also be provided on the inner layer of the silver ion layer 71, so that the bacteria inside the gas can be inactivated and the inactivated bacteria can be adsorbed and removed in sequence during the process of the gas shuttling from the outside to the inside.

[0092] In summary, the disassembly process of the cylindrical filter element 4 is as follows:

[0093] First, remove the injection gas pipe 2 from the fixed air cylinder 61 and remove the output pipe 3 from the cylinder body 1;

[0094] Remove the top cover of the cylinder body 1 and take away the fixed air cylinder 61, the movable air cylinder 62, the clamping cover 17, and the air passing cylinder 5 along with it;

[0095] Take out the cylindrical filter element 4 upward;

[0096] Remove the horizontal partition plate 81 and the sealing arc plate 82 from the cylindrical filter element 4, the horizontal partition plate 81 can be cleaned, and a new cylindrical filter element 4 can be replaced. Install the horizontal partition plate 81 and the sealing arc plate 82 in the new cylindrical filter element 4.

[0097] In order to facilitate the installation of the injection gas pipe 2 and the output pipe 3, the ends of the injection gas pipe 2 and the output pipe 3 can be set to be clamped on the corresponding structures.

[0098] In addition, the installation process of the cylindrical filter element 4 is as follows:

[0099] Put the new and installed cylindrical filter element 4 into the cylinder body 1, the arc-shaped frame body 42 and the bottom of the sealing arc plate 82 are clamped into the annular card slot 16, and the cylindrical filter element 4 is fixed;

[0100] Install the air passing cylinder 5 in the cylindrical filter element 4, the clamping cover 17 is clamped on the annular frame body 41 along with it, and the top cover of the cylinder body 1 is sealed on the cylinder body 1 along with it;

[0101] Insert the injection gas pipe 2 on the fixed air cylinder 61 and insert the output pipe 3 on the outer wall of the cylinder body 1 to complete the installation of the entire structure.

[0102] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A pre-processor for mixed anesthetic gas, characterized in that: It comprises a cylinder (1), and a gas injection pipe (2) and an output pipe (3) are respectively installed on the side walls outside the cylinder (1) close to the two ends; A cylindrical filter element (4) is installed in the cylinder (1), a combined filter layer (7) is installed on the outer peripheral wall of the cylindrical filter element (4), a plurality of partition plate assemblies (8) are installed on the inner wall of the cylinder (1) at equal intervals along the length direction, and the outer periphery of the partition plate assemblies (8) fits with the inner wall of the cylindrical filter element (4) so ​​as to divide the interior of the cylindrical filter element (4) into a plurality of filter chambers (9); An air cylinder (5) is installed in the cylindrical filter element (4), the air cylinder (5) passes through the partition assembly (8), an air cavity (10) is formed in the air cylinder (5), a plurality of air holes (11) are opened on the outer wall of the air cylinder (5), and the air cavity (10) is connected with the filter cavity (9) through the air holes (11); A telescopic gas injection structure (6) is installed in the gas cylinder (5), and the telescopic gas injection structure (6) comprises a fixed gas cylinder (61) and a movable gas cylinder (62) which are fitted together, the fixed gas cylinder (61) is connected to the gas injection pipe (2), and the movable gas cylinder (62) is connected to the gas cavity (10); The movable gas cylinder (62) is movable relative to the fixed gas cylinder (61) so as to adjust the position of the gas output on the movable gas cylinder (62) to face the inside of different filter cavities (9); The inner wall of the cylinder (1) is provided with a plurality of annular cavities (12) at equal intervals along the height direction, and the annular cavities (12) are respectively opposite to and connected to two adjacent filter cavities (9) along the height direction; The gas passes through the gas injection pipe (2), the fixed gas cylinder (61), the movable gas cylinder (62) in sequence, enters the gas cavity (10), and then passes through the gas hole (11) to enter one of the filter cavities (9). The gas passes through the first filter cavity (9) to enter the annular cavity (12), and then passes through the annular cavity (12) to enter the second filter cavity (9), and finally is discharged through the annular cavity (12) at the bottom and the output pipe (3).

2. The pre-processor of the mixed anesthetic gas according to claim 1, characterized in that: A threaded bolt (13) is arranged inside the fixed gas cylinder (61), the threaded bolt (13) passes through the top cover of the cylinder body (1), the end of the threaded bolt (13) is connected to a movable bolt (14), and the end of the threaded bolt (13) away from the movable bolt (14) is threadedly assembled with an outer sleeve (15); The threaded bolt (13) is movably connected to the fixed air cylinder (61), the outer sleeve (15) is movably connected to the movable air cylinder (62), and the threaded bolt (13), the movable bolt (14) and the outer sleeve (15) are all located at a central position facing the air cavity (10).

3. The pre-processor of the mixed anesthetic gas according to claim 2, characterized in that: The fixed gas cylinder (61) has a first slot (63) at its end, the movable gas cylinder (62) has a second slot (64) at its end, and the threaded bolt (13) passes through the first slot (63); The outer peripheral side of the threaded bolt (13) is connected to a connecting bearing (65), and the connecting bearing (65) is installed in the first slot (63). The end of the outer sleeve (15) is connected to a positioning slot seat (66), and the positioning slot seat (66) is installed in the second slot (64).

4. The pre-processor of the mixed anesthetic gas according to claim 3, characterized in that: The outer diameters of the fixed gas cylinder (61) and the movable gas cylinder (62) are both smaller than the inner diameter of the gas cylinder (5); The bottom of the movable air cylinder (62) is connected to a blocking column (67), the blocking column (67) is arranged along the length direction of the outer sleeve (15), and the outer wall of the blocking column (67) is in sliding contact with the inner wall of the air cylinder (5); The bottom of the air cylinder (5) is connected to a limit bolt (68), the blocking column (67) is provided with a limit hole groove (69), and the end of the limit bolt (68) is slidably arranged in the limit hole groove (69); The movable air cylinder (62) is provided with an annular blocking seat (610) on its outer sleeve, the inner wall of the annular blocking seat (610) is connected to the movable air cylinder (62), and its outer wall is in sliding contact with the inner wall of the air cylinder (5), and the area in the air cylinder (5) between the annular blocking seat (610) and the blocking column (67) is directly opposite to at least one of the air holes (11).

5. The pre-processor of the mixed anesthetic gas according to claim 1, characterized in that: The annular cavity (12) located at the bottom is in communication with the output pipe (3).

6. The pre-processor of the mixed anesthetic gas according to claim 1, characterized in that: The cylindrical filter element (4) comprises an annular frame (41) and an arc-shaped frame (42) which are arranged in sequence from top to bottom; The inner diameters and outer diameters of the annular frame (41) and the arc-shaped frame (42) are consistent; the arc-shaped frame (42) is provided with a notch (43); a door-shaped frame (44) is connected to the notch (43); the bottom of the door-shaped frame (44) is connected to two ends of the notch (43); the height of the door-shaped frame (44) is greater than half of the distance between the annular frame (41) and the arc-shaped frame (42); The top end of the door-shaped frame (44) is connected to the annular frame body (41) via a connecting arc plate (46).

7. The pre-processor of the mixed anesthetic gas according to claim 6, characterized in that: The combined filter layer (7) is installed between the annular frame (41) and the arc-shaped frame (42); the combined filter layer (7) is cylindrical, and a first opening (75) and a second opening (76) are formed on its side wall, the width of the first opening (75) being smaller than the width of the second opening (76); The edge of the second opening (76) is connected to the side of the door-shaped frame (44), the edge of the first opening (75) is connected to both sides of the connecting arc plate (46), the top of the combined filter layer (7) is connected to the annular frame (41), and the bottom is connected to the arc frame (42).

8. The pre-processor of the mixed anesthetic gas according to claim 6, characterized in that: The partition assembly (8) comprises a horizontal partition (81), a sealing arc plate (82) is connected to the side of the horizontal partition (81), the sealing arc plate (82) is clamped in the door-shaped frame (44), and the outer wall of the horizontal partition (81) is matched with the inner wall of the combined filter layer (7); The annular frame (41), the arc-shaped frame (42), the sealing arc plate (82), and the combined filter layer (7) are combined to form a cylindrical structure; The air cylinder (5) passes through the horizontal partition (81), and a central groove (83) is provided on the horizontal partition (81) for the air cylinder (5) to pass through. A snap-fit ​​cover (17) is connected to the top of the air cylinder (5), and the snap-fit ​​cover (17) is connected to the outer wall of the fixed air cylinder (61). The snap-fit ​​cover (17) is snap-fitted to the annular frame (41). The end of the air cylinder (5) extends into the filter cavity (9) at the bottom, and the air hole (11) is arranged on the outer wall of the air cylinder (5) away from the filter cavity (9) at the bottom.

9. The pre-processor of the mixed anesthetic gas according to claim 8, characterized in that: An annular groove (16) is provided at the bottom of the cylinder (1), and the bottoms of the arc-shaped frame (42) and the sealing arc plate (82) are inserted into the annular groove (16).

10. The pre-processor of the mixed anesthetic gas according to claim 1, characterized in that: The combined filter layer (7) comprises a silver ion layer (71), a cold catalyst layer (72), a HEPA layer (73) and an activated carbon layer (74) which are arranged in sequence from the inner layer to the outer layer; The silver ion layer (71), the cold catalyst layer (72), the HEPA layer (73) and the activated carbon layer (74) are pressed together to form the combined filter layer (7).

Images