A countable anesthetic waste gas adsorption bag

Abstract

This utility model discloses a countable anesthetic waste gas adsorption bag, relating to the field of metering device technology. It includes a receiving bag with a one-way valve at its inlet end; a conversion tube, sealed to the inlet end of the receiving bag, with its other end connected to a waste gas source; a flow sensing component, including an impeller and a speed sensor, located in the middle section of the conversion tube; and a controller, mounted on the periphery of the conversion tube via wires, with its input end electrically connected to the flow sensing component and its output end equipped with an alarm. The conversion tube of this utility model adopts a variable diameter design where the diameter of the middle section is smaller than that of the connecting sections at both ends. Based on fluid mechanics principles, this increases the flow velocity of the waste gas in the middle section, enhancing the sensitivity of flow detection and reducing waste gas retention, ensuring smooth transmission. By setting multiple flow sensing components, it can perform real-time and accurate dual detection of the anesthetic waste gas flow rate, avoiding errors or malfunctions that may occur with single detection methods, and providing reliable data for flow calculation.

Description

Technical Field

[0001] This utility model relates to the field of metering device technology, specifically to a countable anesthetic waste gas adsorption bag. Background Technology

[0002] In recent years, anesthetic waste gas adsorption devices have played a crucial role in medical surgical environments, collecting and treating waste gases emitted by anesthesia machines. These devices typically reduce the pollution of operating room air by volatile anesthetic drugs through physical adsorption, ensuring the health and safety of medical staff and patients. Common adsorption bags utilize activated carbon or other adsorption media, effectively capturing harmful components in the waste gas and meeting relevant requirements for hospital infection control and environmental emissions. With the development of medical technology, the safe management of anesthetic waste gas has received increasing attention, and the application of related equipment has gradually become more widespread.

[0003] Currently, existing anesthetic waste gas adsorption bags have relatively limited functions, typically only possessing basic collection and adsorption capabilities, and cannot perform real-time monitoring and quantitative management of waste gas flow. Due to the lack of a reliable counting mechanism, medical staff find it difficult to accurately determine the usage status and saturation level of the adsorption bags, often relying on experience or fixed intervals for replacement, which may lead to untimely replacement or premature disposal. This uncertainty not only reduces the efficiency of the adsorption bags but may also increase environmental pollution and operating costs, hindering the refined management of medical procedures. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a countable anesthetic waste gas adsorption bag.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A countable anesthetic waste gas adsorption bag, comprising

[0007] The storage bag has a one-way valve at its air inlet that allows only gas to enter the inner cavity;

[0008] A conversion tube is sealed and connected to the air inlet end of the storage bag, and its other end is connected to an external exhaust gas source. The conversion tube has a middle section and an air inlet connection section and an air outlet connection section located at its two ends respectively. The diameter of the middle section is smaller than the diameter of the air inlet connection section and the air outlet connection section.

[0009] A flow sensing component, including an impeller and a speed sensor, is disposed in the middle section of the switching tube and is used to detect the flow rate of the exhaust gas flowing through the switching tube and generate a flow signal.

[0010] The controller is installed on the periphery of the converter pipe via wires. Its input end is electrically connected to the flow sensing component, and its output end is equipped with an alarm. When the accumulated flow signal is greater than a preset value, the controller activates the alarm to sound.

[0011] Preferably, the flow sensing component further includes a differential pressure sensor, with its two detection ends respectively disposed at the air inlet connection section and the middle section of the conversion tube, for detecting the pressure difference between the two ends and generating a flow signal.

[0012] Preferably, the inner cavity of the conversion tube is further provided with a component sensing component, including a gas component sensor, which is electrically connected to the controller and is used to detect the concentration of a specific gas component in the exhaust gas and generate a component signal.

[0013] Preferably, the controller is provided with a processing and display unit, which is electrically connected to the flow sensing component and the composition sensing component, for receiving flow signals and composition signals, and calculating and displaying the total cumulative exhaust gas volume based on the flow signals and composition signals.

[0014] Preferably, the storage bag is made of a transparent, flexible polymer material, which is one of polyvinyl chloride, thermoplastic polyurethane, or polyethylene, and the inner cavity of the storage bag is provided with an activated carbon adsorption layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. The conversion pipe of this utility model adopts a variable diameter design where the diameter of the middle section is smaller than that of the two connecting sections. Based on the principle of fluid mechanics, the flow velocity of the exhaust gas in the middle section is increased, which not only enhances the sensitivity of flow detection, but also reduces exhaust gas retention and impurity deposition, ensuring smooth transmission channel.

[0017] 2. This invention, by incorporating a flow sensing component consisting of an impeller, a speed sensor, and a differential pressure sensor, enables real-time and accurate dual detection of anesthetic waste gas flow rate. This avoids errors or malfunctions that may occur with single detection methods, providing reliable data for flow calculation. The processing and display unit within the controller accurately calculates and displays the total cumulative waste gas volume based on the flow signal, allowing medical personnel to intuitively monitor the usage of the adsorption bag. Attached Figure Description

[0018] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a countable anesthetic waste gas adsorption bag according to the present invention;

[0020] Figure 2 For the present utility model Figure 1 Enlarged view of region A;

[0021] Figure 3For the present utility model Figure 1 Enlarged view of region B;

[0022] Figure 4 For the present utility model Figure 1 Another perspective structural diagram;

[0023] Figure 5 For the present utility model Figure 4 Enlarged view of region C.

[0024] The diagram shows the following components: 1. Storage bag; 2. One-way valve; 3. Converter pipe; 4. Intermediate section; 5. Inlet connection section; 6. Outlet connection section; 7. Impeller; 8. Speed ​​sensor; 9. Controller; 10. Alarm; 11. Differential pressure sensor; 12. Gas composition sensor. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] Example

[0027] like Figure 4 As shown, a countable anesthetic waste gas adsorption bag includes a receiving bag 1 made of a transparent, flexible polymer material, which is one of polyvinyl chloride, thermoplastic polyurethane, or polyethylene.

[0028] Polyvinyl chloride has good chemical stability and can resist the erosion of various chemicals in anesthetic waste gas, avoiding material corrosion that would affect the sealing performance and service life of the adsorption bag.

[0029] Thermoplastic polyurethane has both excellent flexibility and wear resistance. Even when subjected to certain pressure and friction during the use of the adsorption bag, it is not easy to break, which can ensure its long-term stable use.

[0030] Polyethylene has excellent low-temperature resistance and can adapt to different temperature environments that may occur in the operating room. At the same time, its material is lightweight and will not put too much burden on the overall use and handling of the absorbent bag.

[0031] The transparent nature of the bag allows medical staff to visually observe the filling status of the waste gas inside the bag, keep track of the bag's usage progress, and make a preliminary judgment on whether further treatment is needed without disassembly or the use of other tools.

[0032] The inner cavity of the storage bag 1 is equipped with an activated carbon adsorption layer. Activated carbon has a rich porous structure, a large specific surface area, and a strong adsorption capacity. It can efficiently capture volatile anesthetic drug components in anesthetic waste gas, such as harmful gas molecules like sevoflurane and isoflurane. These harmful gas molecules will be adsorbed and fixed by the pores of the activated carbon, thereby effectively preventing them from leaking into the air of the operating room and avoiding damage to the respiratory system of medical staff and patients. It also meets the relevant requirements for hospital infection control and environmental protection emissions.

[0033] To ensure the adsorption effect, the activated carbon adsorption layer adopts a multi-layer stacked design with reasonable gaps between each layer. This increases the contact area and contact time between the waste gas and the activated carbon, and also ensures that the waste gas flows smoothly within the adsorption layer, preventing the normal collection of waste gas from being affected by the blockage of the adsorption layer.

[0034] The air inlet of the storage bag 1 is equipped with a one-way valve 2 that only allows gas to enter the inner cavity. The one-way valve 2 is made of high-quality elastic sealing material, which has excellent sealing performance and can effectively prevent the backflow of the anesthetic waste gas collected in the storage bag 1.

[0035] When the anesthetic waste gas enters the storage bag 1 from the conversion tube 3, the pressure of the waste gas will push the valve core of the one-way valve 2 to open, allowing the waste gas to smoothly enter the inner cavity of the storage bag 1. When the waste gas stops entering or the pressure inside the storage bag 1 is greater than the external pressure, the valve core of the one-way valve 2 will automatically close under the action of its own elastic force and internal pressure, strictly blocking the reverse flow of the waste gas, ensuring that the anesthetic waste gas is always confined inside the storage bag 1, avoiding secondary pollution caused by the backflow of waste gas, and ensuring the safety of the air environment in the operating room.

[0036] Preferred, such as Figure 1-3 As shown, the conversion tube 3 is sealed to the air inlet end of the storage bag 1, and its other end is connected to the exhaust gas source. The sealing connection of the conversion tube 3 adopts a double fixing method of high-strength sealant and clamp. The sealant is a special sealing material that is resistant to chemical corrosion and high temperature, which can effectively fill the tiny gaps between the conversion tube 3 and the air inlet end of the storage bag 1 and the connection part between the conversion tube 3 and the exhaust gas source, preventing the leakage of anesthetic exhaust gas at the connection part. The clamp is made of stainless steel, which has good strength and toughness. By tightening the clamp bolts, the sealing surface of the connection part can be tightly fitted, further enhancing the sealing performance and ensuring the sealing reliability of the entire exhaust gas transmission channel.

[0037] The conversion tube 3 has an intermediate section 4 and an inlet connection section 5 and an outlet connection section 6 located at its two ends, respectively. The diameter of the intermediate section 4 is smaller than the diameter of the inlet connection section 5 and the outlet connection section 6. This variable diameter design is based on the principle of fluid mechanics. When the anesthetic waste gas flows from the inlet connection section 5 with a larger diameter into the intermediate section 4 with a smaller diameter, the gas velocity will increase accordingly according to the continuity equation.

[0038] The increased flow rate is beneficial in two ways: firstly, it enhances the sensitivity of the subsequent flow sensing components to detect the exhaust gas flow, making the detection results more accurate; secondly, it can reduce the residence time of the exhaust gas in the conversion tube 3 to a certain extent, reduce the risk of leakage during the transmission process, and avoid the problem of impurity deposition caused by the slow airflow speed, thus ensuring the cleanliness and smooth flow inside the conversion tube 3.

[0039] Preferred, such as Figure 1-5 As shown, the flow sensing component, including impeller 7 and speed sensor 8, is set in the middle section 4 of the conversion tube 3 to detect the flow rate of the exhaust gas flowing through the conversion tube 3 and generate a flow signal. The impeller 7 is made of lightweight, high-strength engineering plastic, and its blades are specially aerodynamically designed to have good aerodynamic performance.

[0040] When the anesthetic exhaust gas flows through the middle section 4 at a certain speed, the airflow will drive the impeller 7 to rotate around its central axis, and there is a stable linear relationship between the rotational speed of the impeller 7 and the flow rate of the exhaust gas. The faster the flow rate, the higher the rotational speed of the impeller 7.

[0041] The speed sensor 8 is a non-contact Hall sensor. Its installation position corresponds to the edge of the blade of the impeller 7, and a reasonable gap is maintained between the two. This will not affect the normal rotation of the impeller 7, but will also accurately detect the speed of the impeller 7.

[0042] When the impeller 7 rotates, the blades periodically block and conduct the detection optical path or magnetic field of the speed sensor 8. The speed sensor 8 generates a corresponding pulse signal based on this change. The frequency of the pulse signal is proportional to the rotational speed of the impeller 7. The flow rate of the exhaust gas can be calculated by the frequency of the pulse signal. Combined with the cross-sectional area of ​​the middle section 4 of the conversion pipe 3, the instantaneous flow rate of the exhaust gas flowing through the conversion pipe 3 can be obtained and converted into a flow signal and transmitted to the controller 9.

[0043] The flow sensing component also includes a differential pressure sensor 11, whose two detection ends are respectively set in the air inlet connection section 5 and the middle section 4 of the conversion pipe 3, and are used to detect the pressure difference between the two ends and generate a flow signal. The differential pressure sensor 11 adopts a high-precision piezoresistive pressure sensor, which has the advantages of high measurement accuracy, fast response speed and good stability.

[0044] Since the diameter of the middle section 4 of the conversion pipe 3 is smaller than the diameter of the intake connection section 5, when the exhaust gas flows in the conversion pipe 3, according to Bernoulli's equation, a certain pressure difference will be generated between the intake connection section 5 and the middle section 4, and there is a definite functional relationship between the pressure difference and the flow rate of the exhaust gas. The larger the flow rate, the greater the pressure difference.

[0045] The two detection ends of the differential pressure sensor 11 are connected to the interior of the intake connection section 5 and the intermediate section 4 respectively through dedicated pressure guide tubes. It can collect the pressure values ​​of the two parts in real time, calculate the pressure difference between them, and then convert the pressure difference into the corresponding flow signal and send it to the controller 9.

[0046] By employing a dual detection method involving the impeller 7, speed sensor 8, and differential pressure sensor 11, redundant detection of the exhaust gas flow rate can be achieved. When one detection method malfunctions or has a large error, the other detection method can still ensure normal flow detection, greatly improving the reliability and accuracy of flow detection and providing reliable data support for subsequent flow accumulation calculation and alarm triggering.

[0047] Preferred, such as Figure 3 As shown, the inner cavity of the conversion tube 3 is also equipped with a component sensing component, including a gas component sensor 12, which is electrically connected to the controller 9. It is used to detect the concentration of specific gas components in the exhaust gas and generate component signals. The gas component sensor 12 adopts a special gas sensor based on the principle of infrared absorption or electrochemical principle, which can specifically detect specific harmful components commonly found in anesthetic exhaust gas, such as the concentration of volatile anesthetics.

[0048] The detection probe of the gas composition sensor 12 is in direct contact with the exhaust gas inside the converter tube 3. When the exhaust gas flows through the detection probe, specific gas components will undergo specific physical or chemical reactions with the sensor probe, causing changes in the electrical characteristics of the sensor (such as resistance, voltage, current, etc.). These changes are proportional to the concentration of the gas components.

[0049] The gas composition sensor 12 converts this change in electrical properties into a corresponding electrical signal. After being amplified, filtered, calibrated, and processed by the internal signal processing circuit, an accurate composition signal is generated and transmitted to the controller 9.

[0050] By detecting the concentration of specific gas components in the exhaust gas, medical staff can understand the composition and pollution level of the anesthetic exhaust gas, providing an important basis for evaluating the adsorption effect of the adsorption bag. At the same time, they can also promptly detect any abnormal gas emissions, ensuring a safe environment in the operating room.

[0051] Preferred, such as Figure 1 , Figure 4 As shown, the controller 9 is installed on the side of the converter tube 3 via wires. The wires are shielded wires with good insulation and chemical corrosion resistance, which can prevent the influence of external electromagnetic interference on signal transmission and avoid the wires from being corroded by anesthetic exhaust gas, resulting in leakage, short circuit and other faults. This ensures the stability and safety of signal transmission between the controller 9 and each sensing component. Its input end is electrically connected to the flow sensing component.

[0052] The controller 9 is equipped with a processing and display unit, which is electrically connected to the flow sensing component and the composition sensing component. It is used to receive flow signals and composition signals, and calculate and display the total cumulative exhaust gas volume based on the flow signals and composition signals. The core of the processing and display unit is a high-performance microprocessor. The microprocessor stores a special control program and data processing algorithm, which can process and calculate the received flow signals in real time.

[0053] For the flow signals from the speed sensor 8 and the differential pressure sensor 11, the microprocessor will first perform data validity judgment and error correction, remove abnormal data and interference signals, and then perform integral calculation on the instantaneous flow signal according to the preset algorithm to obtain the cumulative volume of exhaust gas flowing through the conversion pipe 3 over a period of time. At the same time, the microprocessor will also combine the composition signal from the gas composition sensor 12 to separately count and calculate the volume of exhaust gas with different components in order to have a more comprehensive understanding of the exhaust gas emission situation.

[0054] The processing and display unit is also equipped with a high-definition LCD screen. The screen adopts a high-brightness and high-contrast design, so that even in the complex lighting environment of the operating room, medical staff can clearly read the display content. The screen can display information such as the instantaneous flow rate of the exhaust gas, the total cumulative volume, the concentration of each specific gas component, and the usage time of the adsorption bag in real time. The display interface is simple and intuitive and easy to operate. Medical staff can perform parameter settings, data queries, zeroing and other operations through the buttons on the controller 9.

[0055] The controller 9 is equipped with an alarm 10 at its output. When the accumulated flow signal exceeds the preset value, the controller 9 will activate the alarm 10 to sound. The alarm 10 uses a high-decibel buzzer with a sound intensity of over 80 decibels, which can clearly emit an alarm sound in a noisy operating room environment, ensuring that medical staff can detect it in time.

[0056] In the settings interface of the controller 9, medical staff can preset a cumulative flow threshold based on the capacity of the adsorption bag, the adsorption capacity of the activated carbon adsorption layer, and the actual usage of the operating room. When the cumulative volume of exhaust gas calculated by the processing display unit reaches or exceeds the preset threshold, the microprocessor will determine that the adsorption bag is close to or has reached saturation. At this time, it will immediately send a control signal to the alarm 10, triggering the alarm 10 to emit a continuous siren.

[0057] At the same time, the LCD screen of controller 9 will also display corresponding alarm prompts, such as "The adsorption bag is about to be saturated, please replace it in time", reminding medical staff to replace the adsorption bag as soon as possible in a dual manner to avoid leakage of anesthetic waste gas due to the adsorption bag being saturated, and to ensure the safety of the air environment in the operating room and the normal progress of the medical process.

[0058] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A countable anesthetic waste gas adsorption bag, characterized in that: include The storage bag has a one-way valve at its air inlet that allows only gas to enter the inner cavity; A conversion tube is sealed and connected to the air inlet end of the storage bag, and its other end is connected to an external exhaust gas source. The conversion tube has a middle section and an air inlet connection section and an air outlet connection section located at its two ends respectively. The diameter of the middle section is smaller than the diameter of the air inlet connection section and the air outlet connection section. A flow sensing component, including an impeller and a speed sensor, is disposed in the middle section of the switching tube and is used to detect the flow rate of the exhaust gas flowing through the switching tube and generate a flow signal. The controller is installed on the periphery of the converter pipe via wires. Its input end is electrically connected to the flow sensing component, and its output end is equipped with an alarm. When the accumulated flow signal is greater than a preset value, the controller activates the alarm to sound.

2. The countable anesthetic waste gas adsorption bag according to claim 1, characterized in that: The flow sensing component also includes a differential pressure sensor, whose two detection ends are respectively located at the air inlet connection section and the middle section of the conversion tube, for detecting the pressure difference between the two ends and generating a flow signal.

3. The countable anesthetic waste gas adsorption bag according to claim 2, characterized in that: The inner cavity of the conversion tube is also provided with a component sensing component, including a gas component sensor, which is electrically connected to the controller and is used to detect the concentration of specific gas components in the exhaust gas and generate a component signal.

4. The countable anesthetic waste gas adsorption bag according to claim 3, characterized in that: The controller is equipped with a processing and display unit, which is electrically connected to the flow sensing component and the composition sensing component. It is used to receive flow signals and composition signals, and calculate and display the total cumulative volume of exhaust gas based on the flow signals and composition signals.

5. A countable anesthetic waste gas adsorption bag according to claim 4, characterized in that: The storage bag is made of a transparent, flexible polymer material, which is one of polyvinyl chloride, thermoplastic polyurethane, or polyethylene, and the inner cavity of the storage bag is provided with an activated carbon adsorption layer.

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