Device and method for treating anesthetic waste gas in operating room

Abstract

The invention provides an operating room anesthetic waste gas treatment device and method, belongs to the technical field of medical instruments, and aims to solve the technical problem that the operating room environment is continuously polluted due to the fact that the anesthetic gas metabolic rate is low and expired gas of a patient contains anesthetic gas. Comprising an air inlet provided with a valve capable of being opened and closed; the temporary storage bin is connected with the gas inlet, is provided with a first pressure regulator and can provide negative pressure to actively inhale waste anesthetic gas or provide positive pressure to actively discharge gas in the bin; the adsorber comprises a filtering section and a containing cavity section which are communicated, the filtering section is communicated with the temporary storage bin, the containing cavity section is provided with a second pressure regulator, the filtering section is provided with anesthetic waste gas adsorption filler, and a gas outlet is formed in the area between the filtering section and the containing cavity section. The technical effects of removing waste anesthetic gas in the operating room and guaranteeing the air quality in the operating room are achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an operating room anesthesia waste gas treatment device and method. Background Technology

[0002] Operating room gas anesthesia is an important auxiliary method in modern surgery. It involves continuously delivering 3% to 4% sevoflurane or other anesthetic gases to the patient through devices such as laryngeal masks to maintain the anesthetic state. In clinical practice, anesthesia ventilators simultaneously deliver a mixture of nitrous oxide, oxygen, and isoflurane to maintain the patient's anesthetic state during surgery.

[0003] Existing research indicates that inhaled anesthetics have extremely low metabolic rates in the human body. For example, only about 5% of sevoflurane is converted and absorbed, while the remaining 95% is directly excreted through the respiratory system. This characteristic leads to the continuous accumulation of high concentrations of anesthetic waste gas in the operating room environment, causing not only air pollution but also potential neurotoxicity to medical personnel through respiration and other routes, posing occupational health hazards. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes an operating room anesthetic waste gas treatment device and method to solve the technical problem of continuous environmental pollution in the operating room caused by the low metabolic rate of anesthetic gases and the presence of anesthetic gases in patients' exhaled air.

[0005] The technical solution adopted in this invention is an operating room anesthesia waste gas treatment device and method.

[0006] One of the devices for treating anesthetic waste gas in an operating room includes: Air intake; A temporary storage chamber connected to the air inlet is equipped with a first pressure regulator, which can provide negative pressure for active inhalation of anesthetic waste gas or provide positive pressure for active exhaust of gas inside the chamber. An adsorber includes a filter section and a cavity section connected together. The filter section is connected to a temporary storage chamber. The cavity section is equipped with a second pressure regulator. The filter section is equipped with anesthetic waste gas adsorption packing. An outlet is provided in the area between the filter section and the cavity section.

[0007] Optionally, the first pressure regulator includes a first piston that slides in conjunction with the inner wall of the temporary storage chamber, and the pressure of the temporary storage chamber is adjusted by sliding the first piston; the second pressure regulator includes a second piston that slides in conjunction with the inner wall of the cavity section, and the pressure of the cavity section is adjusted by sliding the second piston.

[0008] Optionally, the first piston divides the temporary storage chamber into a working chamber and a control chamber, with the working chamber connected to the air inlet; the second piston divides the cavity section into a working chamber and a control chamber, with the working chamber connected to the filter section; and further includes a working state control mechanism capable of adjusting the pressure of the temporary storage chamber and the cavity section.

[0009] Optionally, the working state control mechanism includes a tube body, a third piston and a fourth piston that are slidably disposed back-to-back within the tube body, the tail end cavity of the third piston being connected to the control cavity of the temporary storage chamber, and the tail end cavity of the fourth piston being connected to the control cavity of the diaphragm section; the contact surfaces of the third piston and the fourth piston are provided with magnetic adsorption pairs, which can be connected to each other as a whole when there is no external force; the shafts of the third piston and the fourth piston are each provided with a central hole, the central hole communicating with the external atmospheric environment and the area between the third piston and the fourth piston, and the central hole can be closed.

[0010] Optionally, the filter section has a double-layer structure, with the adsorption filler material disposed in the inner layer and the outer layer isolated from the inner layer and disposed of with refrigerant.

[0011] Optionally, the air inlet is tangentially inserted into the inner cavity of the adsorber. In the inner cavity of the adsorber, a suction mechanism is provided in the height region corresponding to the air inlet. The suction mechanism includes a ring body and spiral blades disposed on the outer periphery of the ring body. The inside of the ring body is connected to the filter section, and the ring body is driven by a rotational power source.

[0012] Optionally, the adsorption filler is activated carbon, with an abrasion resistance of ≥95% and a carbon tetrachloride adsorption rate of ≥65%.

[0013] One method for treating anesthetic waste gas in an operating room, using an operating room anesthetic waste gas treatment device as described above, includes the following steps: Collection steps: The air inlet is connected to the exhalation port of the breathing mask, the channel between the temporary storage chamber and the adsorber and the air outlet are closed, and the temporary storage chamber collects and stores the exhaled air; Processing steps: The air inlet is cut off, the channel between the temporary storage chamber and the adsorber is connected, and the exhaled air in the temporary storage chamber is pumped into the adsorber and passes through the filter section.

[0014] Optionally, the temporary storage chamber and the cavity section alternately generate positive and negative pressure, and the exhaled air repeatedly passes through the filtration section.

[0015] One method for treating anesthetic waste gas in an operating room, using an operating room anesthetic waste gas treatment device as described above, includes the following steps: Both the air inlet and outlet are open, refrigerant is introduced into the outer layer of the filter section, the suction mechanism is activated, and exhaled air is drawn into the adsorber by the suction mechanism and discharged after passing through the filter section.

[0016] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows: The operating room anesthetic waste gas treatment device provided by this invention achieves negative pressure active intake of anesthetic waste gas exhaled by patients through a first pressure regulator in the temporary storage chamber, preventing waste gas leakage and environmental pollution. The adsorber is equipped with anesthetic waste gas adsorption packing, which can efficiently capture harmful components in the waste gas. Combined with a second pressure regulator, it ensures smooth gas flow, and finally, filtered air is discharged through the outlet. This device effectively solves the problem of continuous pollution in the operating room environment caused by the low metabolic rate of anesthetic gases, significantly improves the air quality in the operating room, and protects the occupational health and safety of medical staff. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a three-dimensional schematic diagram of the device.

[0019] Figure 2 This is a schematic diagram of a three-dimensional cross-section.

[0020] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0021] Figure 4 This is a frontal view of the device.

[0022] Figure 5 for Figure 4 Schematic diagram of the BB section.

[0023] Figure 6 This is a schematic diagram of the gas circuit of a ventilator.

[0024] Reference numerals: 1. Inlet; 2. Temporary storage chamber; 21. First piston; 22. Working chamber; 23. Control chamber; 3. Adsorber; 3. Filter section; 31. Adsorption packing; 311. Refrigerant; 312. Chamber section; 32. Second piston; 321. Ring; 33. Spiral blade; 34. Outlet; 4. Working status control mechanism; 5. Tube body; 51. Third piston; 52. Fourth piston; 53. Magnetic adsorption pair; 54. Center hole; 55. Detailed Implementation

[0025] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0027] To facilitate understanding of this solution, a brief explanation of the relevant technical background will be given before introducing the implementation method.

[0028] Inhalation anesthesia is a form of general anesthesia that induces unconsciousness in patients through the inhalation of volatile liquid or gaseous anesthetic drugs. It is widely used in general anesthetic surgeries. Its core components include sevoflurane, isoflurane, desflurane, and nitrous oxide. Sevoflurane is the preferred choice for anesthesia induction due to its aromatic odor, low airway irritation, and rapid induction / recovery properties; desflurane achieves rapid adjustment of anesthesia depth with the lowest blood / gas partition coefficient. These drugs enter the bloodstream through the alveoli, cross the blood-brain barrier, and act on the central nervous system, inhibiting neurotransmitter transmission. Over 95% are exhaled unchanged without being metabolized, with only about 5% being processed by the liver or kidneys.

[0029] The structure of a traditional anesthesia ventilator is as follows Figure 6 As shown, the anesthesia ventilator consists of an expiratory circuit (upper circuit in the diagram), an inspiratory valve, an expiratory valve, a check valve, a mixer, an inspiratory circuit (lower circuit in the diagram), and a humidifier. During anesthesia, various anesthetic gases are introduced into the mixer via a high-pressure gas tubing. After bacterial filtration, the anesthetic gas pressure is controlled to approximately 0.4 MPa, allowing it to be inhaled. The inspiratory valve controls the inspiratory pressure and gas flow rate, ensuring the gas flows through the inspiratory circuit to the lungs. During operation, oxygen is first supplied. Once the oxygen pressure reaches a certain threshold, the shut-off valve is disconnected, and the anesthetic gas flow rate is regulated by a flow meter. After mixing, the gas is introduced into the anesthetic drug vaporizer and supplied to the patient's breathing circuit. Utilizing the principle of air pressure, the internally driven anesthetic gas assists the patient in inhaling the anesthetic gas and exhaling waste gas, completing gas exchange. When the patient inhales anesthesia, the driving gas is introduced into the bellows, causing the internal pressure to rise rapidly, compressing the air bag, and promoting the circulation of anesthetic gas within the body for anesthesia. When expelling waste gas from the human body, the internal air pressure is rapidly reduced by using a driving gas discharge method, thereby expelling the waste gas from the human body.

[0030] In short, the inspiratory circuit mixes oxygen and anesthetic gas, provides inspiratory pressure, and pumps the gas into the patient's lungs; the expiratory circuit provides expiratory pressure (negative pressure) to expel gas from the patient's lungs; the inspiratory and expiratory circuits work alternately to maintain and regulate the patient's breathing. At the end of the expiratory circuit, a check valve is installed, which can expel the patient's exhaled waste gas and prevent the exhaled waste gas from flowing back into the breathing circuit. Specifically, when the patient exhales, waste gas is expelled outward through the expiratory circuit, and the check valve opens under airflow pressure, allowing gas to pass through in one direction; when exhalation ends or the system switches to the inspiratory phase, the valve automatically closes, preventing external gas (including incompletely expelled waste gas or ambient air) from entering the circuit back.

[0031] Patients' exhaled breath contains a large amount of unmetabolized anesthetic gases, which, if left untreated, will fill the operating room. Long-term exposure to unpurified anesthetic waste gases by medical staff may lead to risks such as headaches, liver and kidney damage, and hematopoietic system abnormalities. Therefore, a highly efficient waste gas treatment system is crucial for ensuring air quality in the operating room.

[0032] This solution provides an operating room anesthetic waste gas treatment device and method, which is used to treat the unmetabolized anesthetic gases contained in the patient's exhaled air in order to ensure the air quality in the operating room.

[0033] One of the operating room anesthesia waste gas treatment devices is shown in the appendix. Figures 1-4 One possible implementation method is as follows: Air inlet 1 is equipped with an openable and closable valve. This end can be directly connected to the terminal of the anesthesia ventilator to completely prevent anesthetic gas from escaping into the environment. This end can also be directly connected to the operating room environment to purify the gases in the operating room environment. The temporary storage chamber 2, connected to the air inlet 1, is equipped with a first pressure regulator (capable of adjusting pressure through volume changes). It can provide negative pressure for active inhalation of anesthetic waste gas or positive pressure for active exhalation of gas from the chamber. The negative pressure of the temporary storage chamber 2 is synchronized with the expiratory pressure of the exhalation circuit. It opens each time the patient exhales (while the inhalation circuit closes simultaneously), drawing exhaled gas into the temporary storage chamber 2. The volume of the temporary storage chamber 2 can be changed. Specifically, the temporary storage chamber 2 operates according to the respiratory rhythm. In each inhalation cycle, the volume of gas in the temporary storage chamber 2 increases (pressure decreases); after switching to expiratory mode, exhaled gas enters the temporary storage chamber 2 to fill the newly increased volume, and the pressure of the temporary storage chamber 2 returns to its initial state. After multiple respiratory cycles, a large amount of exhaled gas (containing anesthetic gas) is stored in the temporary storage chamber 2. The valve of the air inlet 1 closes, and the temporary storage chamber 2 pumps all the stored gas to the next stage (adsorber 3) at once, emptying its interior to continue storing exhaled gas. Adsorber 3, the adsorber 3 includes a connected filtration section 31 and a cavity section 32. The filtration section 31 is connected to the temporary storage bin 2, and an on-off valve can be provided on the connecting pipeline to control the pipeline. The cavity section 32 is provided with a second pressure regulator. The filtration section 31 is provided with anesthetic waste gas adsorption filler 311. An air outlet 4 is provided in the area between the filtration section 31 and the cavity section 32, and an on-off valve is also provided at the air outlet. Based on the need for filtration level, more filtration levels can be provided at the rear end of the air outlet 4, or an extension pipe can be used to directly discharge to the outside.

[0034] As a preferred solution, in a possible implementation manner, the adsorption filler 311 is activated carbon. Preferably, the wear resistance of the activated carbon is greater than or equal to 95%, and the carbon tetrachloride adsorption rate is greater than or equal to 65%. However, in specific implementation, more suitable adsorbents can also be selected based on the main components of the actually selected anesthetic gas. In this embodiment, the adsorption filler 311 is selected as activated carbon, mainly based on its high specific surface area, strong adsorption capacity and chemical stability. There are a large number of microporous structures inside the activated carbon, and the specific surface area can reach 500 - 3000 square meters per gram, which can efficiently capture volatile organic compounds (such as sevoflurane, isoflurane) and nitrous oxide and other components in the anesthetic waste gas, and achieve gas purification through physical adsorption. Its chemical inertness can avoid reacting with anesthetic drugs, ensuring safe and reliable long-term use.

[0035] The setting of the wear resistance ≥ 95% aims to ensure the structural integrity of the activated carbon under the impact of air flow (in the treatment method supporting this solution, the gas will be repeatedly passed through the activated carbon under a certain pressure). The anesthetic waste gas treatment device needs to continuously withstand the mechanical friction generated by gas flow. If the wear resistance of the filler is insufficient, it is easy to cause particle breakage or pulverization, forming channels in the carbon bed, which not only reduces the adsorption efficiency, but may also cause secondary pollution (such as microparticles being discharged with the air flow). High wear resistance can extend the service life of the filler (and it can also be regenerated for use), reduce the replacement frequency, and lower the maintenance cost.

[0036] The carbon tetrachloride adsorption rate ≥ 65% is the core index to measure the adsorption performance of activated carbon. The key point is that its molecular size and properties are very similar to those of halogenated ether anesthetic gases such as sevoflurane, isoflurane, and desflurane. As a standard adsorbate, the adsorption rate of carbon tetrachloride directly reflects the capture ability of the material for volatile organic compounds. This parameter ensures that the activated carbon has sufficient adsorption capacity for low-concentration and highly toxic components (such as unmetabolized sevoflurane) in the anesthetic waste gas, so as to continuously maintain a high purification effect during multiple breathing cycles, avoid the risk of waste gas leakage, and effectively ensure that the air quality in the operating room meets the standards.

[0037] In the above embodiment, for the method for treating anesthetic waste gas in the operating room supporting this device, a possible implementation manner is as follows. Using an anesthetic waste gas treatment device in the operating room as above, it includes the following steps: Collection step: The air inlet 1 is connected to the breathing mask (refer to the attachment Figure 6 The exhalation port 4 (at the end of the mid-expiration circuit check valve), the passage between the temporary storage chamber 2 and the adsorber 3, and the outlet 4 are all closed. The temporary storage chamber 2 collects and stores the exhaled air. The temporary storage chamber 2 generates negative pressure through the first pressure regulator, which is synchronized with the patient's expiratory pressure, actively inhaling and storing the exhaled air; its volume changes dynamically according to the respiratory rhythm - the chamber expands accordingly with each exhalation to accommodate the exhaled gas and maintain a stable pressure inside the chamber. After multiple cycles, a sufficient amount of waste gas is temporarily stored. Processing steps: Air inlet 1 is shut off, i.e., the breathing circuit is cut off. The channel between temporary storage chamber 2 and adsorber 3 is connected (the connecting pipeline is equipped with an openable and closable valve). Exhaled air from temporary storage chamber 2 is pumped into adsorber 3 and passes through filter section 31. In the above embodiment, in one possible implementation, temporary storage chamber 2 and cavity section 32 alternately generate positive and negative pressures, and exhaled air repeatedly passes through filter section 31. Activated carbon packing 311 efficiently adsorbs anesthetic gas components; subsequently, cavity section 32 generates negative pressure through a second pressure regulator, causing the waste gas to flow backward through filter section 31 for secondary purification. Repeated adsorption of gas is achieved through (multiple) alternations of positive and negative pressures. Exhaust procedure: The channel between the temporary storage chamber and the adsorber is closed, the air outlet is opened, and the gas is discharged under positive pressure in the cavity section. Optional subsequent filtration stages or direct exhaust to the outside can be added to ensure that the air quality in the operating room meets standards.

[0038] In the above embodiments, the operating room anesthetic waste gas treatment device and method exhibit significant technical effects. Firstly, through precise docking of the temporary storage chamber with the breathing circuit, a fully closed-loop collection of the patient's exhaled anesthetic waste gas is achieved, preventing waste gas leakage into the operating room environment at the source and effectively protecting medical staff from occupational hazards such as headaches and liver and kidney damage caused by long-term exposure. Secondly, the temporary storage chamber employs dynamic volume adjustment technology, combined with an alternating positive and negative pressure drive mode, which not only efficiently stores waste gas but also causes the gas to repeatedly flow through the adsorber through pressure changes, allowing the activated carbon packing to fully adsorb anesthetic gas components, significantly improving purification efficiency and ensuring that the concentration of anesthetic drugs in the emitted gas is far below the safety threshold. Furthermore, the activated carbon packing in the adsorber undergoes rigorous screening, with an abrasion resistance of ≥95%, ensuring structural stability under long-term use and preventing secondary pollution caused by particle shedding; the carbon tetrachloride adsorption rate of ≥65% verifies its highly efficient capture capability of volatile anesthetic gases, meeting the continuous purification needs of clinical practice. This solution systematically addresses the technical challenges of collecting, purifying, and discharging anesthetic waste gas, as well as miniaturizing the equipment, through multi-stage collaborative optimization, providing a reliable guarantee for the safety of air quality in operating rooms.

[0039] In one possible implementation, see Appendix Figure 2The first pressure regulator includes a first piston 21, which slides against the inner wall of the temporary storage chamber 2, adjusting the pressure of the temporary storage chamber 2 by sliding the first piston 21. The second pressure regulator includes a second piston 321, which slides against the inner wall of the cavity section 32, adjusting the pressure of the cavity section 32 by sliding the second piston 321. In this embodiment, in order to accurately adjust the pressure of the temporary storage chamber 2 and the cavity section 32, a corresponding telescopic power source (such as an electric push rod, cylinder, or screw and nut mechanism) is required to control the sliding position of the first piston 21 and the second piston 321. This design boasts three significant technical advantages: First, the piston structure directly controls pressure changes through mechanical displacement, offering a fast response and wide adjustment range, adaptable to different breathing frequencies and waste gas volumes. Second, the linear drive mode of the telescopic power source and piston avoids the lag and complex pipeline connections inherent in traditional valve regulation. Third, the independent control of the dual pistons ensures that pressure changes in the temporary storage chamber 2 and the cavity section 32 do not interfere with each other, guaranteeing complete closure during the waste gas collection stage while achieving sufficient adsorption and rapid emission during the purification stage. This overall enhances the device's processing efficiency and reliability, providing a high-precision and highly stable technical solution for the treatment of anesthesia waste gas in operating rooms.

[0040] In one possible implementation, see Appendix Figure 2 The first piston 21 divides the temporary storage chamber 2 into a working chamber 22 and a control chamber 23, with the working chamber 22 connected to the air inlet 1; the second piston 321 divides the cavity section 32 into a working chamber 22 and a control chamber 23, with the working chamber 22 connected to the filter section 31; it also includes a working state control mechanism 5, which can adjust the pressure of the temporary storage chamber 2 and the cavity section 32.

[0041] Furthermore, the working state control mechanism 5 includes a tube body 51, a third piston 52 and a fourth piston 53 that are slidably disposed back-to-back within the tube body 51. The tail end cavity of the third piston 52 is connected to the control cavity 23 of the temporary storage chamber 2, and the tail end cavity of the fourth piston 53 is connected to the control cavity 23 of the cavity section 32. The contact surfaces of the third piston 52 and the fourth piston 53 are provided with magnetic adsorption pairs 54, which can connect to each other as a whole when there is no external force. The shafts of the third piston 52 and the fourth piston 53 are each provided with a central hole 55, which connects the external atmospheric environment and the area between the third piston 52 and the fourth piston 53. The central hole can be closed and a valve can be installed. The ends of the third piston 52 and the fourth piston 53 are provided with telescopic power sources.

[0042] During the collection phase, the working chamber 22 of the temporary storage chamber 2 generates negative pressure through the displacement of the first piston 21, independently inhaling the patient's exhaled air. At this time, the pressure of the control chamber 23 is independently adjusted by the third piston 52 of the working state control mechanism 5. During the processing phase, the working state control mechanism 5 achieves synchronous pressure regulation of the two chambers through a magnetic linkage mechanism to ensure that the waste gas repeatedly passes through the adsorption section. At this time, the third piston 52 and the fourth piston 53 move synchronously.

[0043] The core innovation of the working state control mechanism 5 lies in the back-to-back arrangement of the third piston 52 and the fourth piston 53 inside the tube 51: their magnetic adsorption pair 54 automatically couples when there is no external force, forming a rigid connection. At this time, the outlet of the central hole 55 is blocked, and the area between the pistons is isolated from the atmosphere. When driven by an external power source, the two pistons move synchronously (the third piston 52 and the fourth piston 53 cannot be pulled apart; if they are pulled apart, a vacuum area is formed between them), so that the pressure of the control chamber 23 of the temporary storage chamber 2 and the control chamber 23 of the cavity section 32 changes in linkage, realizing the coordinated action of the temporary storage chamber 2 and the cavity section 32. When the central hole 55 is opened, the area between the pistons is connected to the atmosphere, the magnetic attraction is overcome by the external pulling force, and the two pistons can slide independently. The pressure of the temporary storage chamber 2 is adjusted independently by the first piston 21 to meet the precise adaptation of the breathing rhythm during the collection stage.

[0044] In one possible implementation, see Appendix Figure 2 The filter section 31 has a double-layer structure. The inner layer is equipped with adsorption packing material 311, and the outer layer is isolated from the inner layer and is equipped with refrigerant 312. (See appendix) Figure 4 and Figure 5 The air inlet 1 enters the inner cavity of the adsorber 3 tangentially. In the inner cavity of the adsorber 3, a suction mechanism is provided in the height area corresponding to the air inlet 1. The suction mechanism includes a ring 33 and a spiral blade 34 disposed on the outer periphery of the ring 33. The inside of the ring 33 is connected to the filter section 31. The ring 33 is driven by a rotational power source.

[0045] A possible implementation method for treating anesthetic waste gas in the operating room is as follows: Using the above-mentioned operating room anesthetic waste gas treatment device, the method includes the following steps: The air inlet 1 is directly connected to the operating room environment rather than directly connected to the patient's exhaled gas. Both the air inlet 1 and the air outlet 4 are open. A refrigerant 312 is introduced into the outer layer of the filter section 31. The suction mechanism is activated, and the exhaled gas in the environment is drawn into the adsorber 3 by the suction mechanism and discharged after passing through the filter section 31. Specifically, the inner layer of the filter section 31 is filled with high-specific-surface-area activated carbon adsorption filler 311, whose pore structure can efficiently capture volatile anesthetic gas molecules (such as isoflurane and sevoflurane). The outer layer adopts an independent sealed cavity design, and the refrigerant 312 circulating inside is a high thermal conductivity liquid (at low temperature), connected to an external refrigeration unit through pipelines. The introduction of refrigerant 312 has dual technical effects: firstly, the low-temperature environment (5-10℃) reduces the thermal kinetic energy of anesthetic gas molecules, making them easier to capture by the pores of activated carbon; secondly, the refrigerant circulation system continuously removes the heat generated during adsorption through heat exchange, preventing desorption due to localized overheating of the activated carbon and ensuring adsorption stability during long-term operation.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for treating anesthesia waste gas in an operating room, characterized in that, include: Air intake (1); A temporary storage chamber (2) connected to the air inlet (1) is provided with a first pressure regulator, which can provide negative pressure for active inhalation of anesthetic waste gas or provide positive pressure for active exhaust of gas in the chamber. The adsorber (3) includes a filter section (31) and a cavity section (32) that are connected. The filter section (31) is connected to the temporary storage chamber (2). The cavity section (32) is provided with a second pressure regulator. The filter section (31) is provided with anesthetic waste gas adsorption packing (311). The area between the filter section (31) and the cavity section (32) is provided with an outlet (4).

2. The operating room anesthesia waste gas treatment device as described in claim 1, characterized in that: The first pressure regulator includes a first piston (21), which slides in conjunction with the inner wall of the temporary storage chamber (2), and adjusts the pressure of the temporary storage chamber (2) by sliding the first piston (21); The second pressure regulator includes a second piston (321), which slides in conjunction with the inner wall of the cavity section (32) to adjust the pressure of the cavity section (32) by sliding the second piston (321).

3. The operating room anesthesia waste gas treatment device as described in claim 2, characterized in that: The first piston (21) divides the temporary storage chamber (2) into a working chamber (22) and a control chamber (23), and the working chamber (22) is connected to the air inlet (1); The second piston (321) divides the cavity section (32) into a working chamber and a control chamber, with the working chamber connected to the filter section (31); It also includes a working status control mechanism (5), which is capable of adjusting the pressure of the temporary storage chamber (2) and the cavity section (32).

4. The operating room anesthesia waste gas treatment device as described in claim 3, characterized in that: The working state control mechanism (5) includes a tube body (51), a third piston (52) and a fourth piston (53) that are slidably disposed back-to-back in the tube body (51). The tail end cavity of the third piston (52) is connected to the control cavity of the temporary storage chamber (2), and the tail end cavity of the fourth piston (53) is connected to the control cavity of the cavity section (32). The contact surfaces of the third piston (52) and the fourth piston (53) are provided with magnetic adsorption pairs (54), which can be connected to each other as one unit when there is no external force. The shafts of the third piston (52) and the fourth piston (53) are each provided with a central hole (55). The central hole (55) connects the external atmospheric environment and the area between the third piston (52) and the fourth piston (53). The central hole (55) can be closed.

5. The operating room anesthesia waste gas treatment device as described in claim 1, characterized in that: The filter section (31) has a double-layer structure, with the adsorption filler (311) provided in the inner layer and the outer layer isolated from the inner layer and provided with refrigerant (312).

6. The operating room anesthesia waste gas treatment device as described in claim 5, characterized in that: The air inlet (1) enters the inner cavity of the adsorber (3) tangentially. In the inner cavity of the adsorber (3), a suction mechanism is provided in the height area corresponding to the air inlet (1). The suction mechanism includes a ring (33) and a spiral blade (34) disposed on the outer periphery of the ring (33). The inside of the ring (33) is connected to the filter section (31). The ring (33) is driven by a rotational power source.

7. The operating room anesthesia waste gas treatment device as described in claim 1, characterized in that: The adsorption filler (311) is activated carbon, with an abrasion resistance of ≥95% and a carbon tetrachloride adsorption rate of ≥65%.

8. A method for treating anesthesia waste gas in an operating room, characterized in that, The operating room anesthesia waste gas treatment device according to any one of claims 1-7 includes the following steps: Collection steps: The air inlet (1) is connected to the exhalation port (4) of the breathing mask. The channel between the temporary storage chamber (2) and the adsorber (3) and the air outlet (4) are closed. The temporary storage chamber (2) collects and stores the exhaled air. Processing steps: The air inlet (1) is cut off, the channel between the temporary storage chamber (2) and the adsorber (3) is connected, and the exhaled air in the temporary storage chamber (2) is pumped into the adsorber (3) and passes through the filter section (31).

9. The method for treating anesthesia waste gas in an operating room as described in claim 8, characterized in that: The temporary storage chamber (2) and the cavity section (32) alternately generate positive and negative pressure, and the exhaled air repeatedly passes through the filter section (31).

10. A method for treating anesthesia waste gas in an operating room, characterized in that, The operating room anesthesia waste gas treatment device as described in claim 6 includes the following steps: both the air inlet (1) and the air outlet (4) are opened, a refrigerant (312) is introduced into the outer layer of the filter section (31), the suction mechanism is turned on, and the exhaled gas is drawn into the adsorber (3) by the suction mechanism and discharged after passing through the filter section (31).

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