Gas mixing structure and waste gas overflow flow measuring device

Abstract

The utility model is applicable to the technical field of medical apparatus and instruments, and provides a gas mixing structure and a waste gas overflow flow measuring device.The gas mixing structure comprises a gas collecting assembly used for collecting gas exhausted by target equipment; the mixing channel is connected with an output port of the gas collecting assembly; the inducer and the rotating impeller are arranged in the mixing channel; the rotating impeller is connected with the driving part and is used for rotating under the driving of the driving part, so that the gas and the air collected by the gas collecting assembly flow into the mixing channel and are uniformly mixed after flowing through the inducer and the rotating impeller. Gas and air collected by the gas collecting assembly enter the mixing channel, the two kinds of gas flow through the inducer in the mixing channel to generate pre-rotation, so that the two kinds of gas are mixed to a certain degree, the collision probability of the two kinds of gas is increased after the gas further flows through the rotating impeller, the two kinds of gas can be mixed uniformly, and the mixing efficiency is improved. And the detection precision of the subsequent gas flow is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a gas mixing structure and a waste gas overflow flow measurement device. Background Art

[0002] The AGSS (Anesthesia Gas Scavenging System) waste gas treatment system is used to extract and treat exhaled waste gas from the anesthesia machine circuit, which contains medical anesthetic gases. Exposure to anesthetic gases for a certain period of time can cause irreversible damage to the human body. The actual overflow flow of the AGSS waste gas treatment system can be measured using the AGSS waste gas treatment system's overflow flow measurement device. The overflow flow rate is one of the key indicators for determining the AGSS waste gas treatment system's compliance.

[0003] The overflow flow measurement device of the AGSS waste gas treatment system has a mixed gas structure. The external air and the anesthetic gas overflowing from the AGSS waste gas treatment system enter the mixing structure and mix before flowing through the sampling point to detect the overflow flow. However, the existing mixing structure does not mix the two gases sufficiently and evenly when the two gases are introduced, which leads to large deviations in the data collected at the sampling point, affecting subsequent judgments. Utility Model Content

[0004] The utility model provides a gas mixing structure and a waste gas overflow flow measuring device, aiming to solve the problem that the overflow flow measuring device of the existing AGSS waste gas treatment system mixes air and anesthetic gas overflowed from the AGSS waste gas treatment system and easily causes uneven mixing.

[0005] The utility model is implemented as follows: a gas mixing structure comprising:

[0006] A gas collection component for collecting gas exhausted from the target device;

[0007] a mixing channel connected to the output of the gas collection assembly; and

[0008] an inducer and a rotating impeller disposed in the mixing channel;

[0009] The rotating impeller is connected to the driving member and is used to rotate under the driving of the driving member so that the gas and air collected by the gas collection assembly flow into the mixing channel and are evenly mixed after flowing through the inducer and the rotating impeller.

[0010] Furthermore, the inducer is fixedly installed in the mixing channel.

[0011] Furthermore, the blade outlet angle of the inducer is consistent with the blade outlet angle of the rotating impeller.

[0012] Furthermore, the mixing channel is provided with an air flow outlet, the rotating impeller is connected to the rotating shaft, and one end of the rotating shaft extends to the air flow outlet and is connected to the driving member.

[0013] Furthermore, the mixing channel is provided with a sampling port, and the sampling port is used to connect with an external measuring device.

[0014] In a second aspect, the present application also provides an exhaust gas overflow flow measurement device, comprising the gas mixing structure as described above.

[0015] Furthermore, the gas collection assembly includes a accommodating space composed of several mounting plates, the accommodating space is used to place the target device, and the mounting plate is provided with a first air inlet, a first air outlet and an air inlet, and the first air inlet and the first air outlet are respectively used to cooperate and connect with the inlet and outlet of the target device.

[0016] Furthermore, the mounting plate is further provided with a second air inlet hole, and the second air inlet hole is used for introducing standard gas.

[0017] The beneficial effect of the present application is that the gas collection component of the present application is used to collect the gas discharged by the target device, and then under the action of the rotating impeller, the gas and air collected by the gas collection component are sucked into the mixing channel. The two gases flow through the inducer in the mixing channel to produce pre-rotation, thereby mixing the two gases to a certain extent. After the gas further flows through the rotating impeller, the probability of collision between the two gases is increased, so that the two gases can be evenly mixed, thereby improving the detection accuracy of subsequent gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an embodiment of a gas mixing structure provided by the present application;

[0019] Figure 2 This is a schematic structural diagram of another embodiment of a gas mixing structure provided by the present application;

[0020] Figure 3 This is a schematic structural diagram of a gas mixing structure according to an embodiment of the present application, in which a mixing channel is removed;

[0021] Figure 4 yes Figure 3 Enlarged schematic diagram of part A1.

[0022] Among them: gas collection component, 100; output port, 110; first air inlet, 120; first air outlet, 130; air inlet, 140; second air inlet, 150; mixing channel, 200; air flow outlet, 210; sampling port, 220; inducer, 300; rotating impeller, 400; rotating shaft, 500. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] The gas collection component of the present application is used to collect the gas exhausted by the target device, and then under the action of the rotating impeller, the gas collected by the gas collection component and the air are sucked into the mixing channel. The two gases flow through the inducer in the mixing channel to produce pre-rotation, thereby mixing the two gases to a certain extent. After the gas further flows through the rotating impeller, the probability of collision between the two gases is increased, so that the two gases can be evenly mixed, thereby improving the detection accuracy of subsequent gas flow.

[0025] Example 1

[0026] like Figures 1 to 4 As shown, this embodiment provides a gas mixing structure, including:

[0027] A gas collection assembly 100 is used to collect gas exhausted from a target device (not shown);

[0028] A mixing channel 200 connected to the output port 110 of the gas collection assembly 100; and

[0029] An inducer 300 and a rotary impeller 400 disposed in the mixing channel 200;

[0030] The rotating impeller 400 is connected to a driving member (not shown) and is used to rotate under the drive of the driving member so that the gas and air collected by the gas collection assembly 100 flow into the mixing channel 200 and are evenly mixed after flowing through the inducer 300 and the rotating impeller 400.

[0031] During implementation, the target device refers to a device that will overflow or discharge waste gas. For example, the target device may be an AGSS waste gas treatment system. During the process of the AGSS waste gas treatment system extracting and processing the waste gas exhaled in the anesthesia machine circuit, there will be a certain amount of gas overflow. The gas mixing structure provided in this application can be used to measure the gas flow overflowing from the AGSS waste gas treatment system.

[0032] It should be noted that the aforementioned target device, namely, the AGSS waste gas treatment system, is merely an example of an embodiment of the present application and is not intended to be a specific limitation of the present application. In other embodiments, the target device may also be another device or apparatus, such as an anesthesia machine, which can be used to measure the flow rate of exhaled waste gas in the anesthesia machine circuit, without limitation.

[0033] In some embodiments, taking the target device as an AGSS exhaust gas treatment system as an example, the gas collection component 100 is used to collect gas overflowed from the AGSS exhaust gas treatment system. The gas collection component 100 is also connected to the mixing channel 200. The mixing channel 200 can adopt a cylindrical or tubular structure. One end of the mixing channel 200 is connected to the output port 110 of the gas collection component 100 so that the gas and air collected by the gas collection component 100 can enter the mixing channel 200.

[0034] Inducer 300 and rotary impeller 400 are disposed within the mixing passage, wherein rotary impeller 400 rotates under the drive of a driving member to create a negative pressure within mixing passage 200, thereby drawing the gas and air collected by gas collection assembly 100 into mixing passage 200. Inducer 300 is fixedly mounted within mixing passage 200 and located before rotary impeller 400. Since inducer 300 has a plurality of blades, these blades can guide the gas flowing through inducer 300, so that the gas and air collected by gas collection assembly 100 are pre-mixed, and then further mixed by the blades of rotary impeller 400, thereby increasing the probability of collision between the two gases and allowing the two gases to be mixed more evenly.

[0035] It should be noted that the mixing of two gases for loading is a description of the distance in the embodiment of the present application, and is not a specific limitation of the present application. In other embodiments, there may be multiple gases mixed, such as three or four gases, without limitation.

[0036] The gas collection component 100 of the present application is used to collect the gas discharged by the target device, and then under the action of the rotating impeller 400, the gas and air collected by the gas collection component 100 are sucked into the mixing channel 200. The two gases flow through the inducer 300 in the mixing channel 200 to produce pre-rotation, thereby mixing the two gases to a certain extent. After the gas further flows through the rotating impeller 400, the probability of collision between the two gases is increased, so that the two gases can be evenly mixed, thereby improving the detection accuracy of subsequent gas flow.

[0037] In some embodiments, the blade outlet angle of inducer 300 is consistent with the blade outlet angle of rotating impeller 400 .

[0038] During implementation, both inducer 300 and rotating impeller 400 are equipped with several blades each having a certain curvature. When the two gases enter mixing channel 200, they first flow through inducer 300. Due to the curvature of the blades of inducer 300, the two gases undergo a certain degree of mixing and pre-swirl. Furthermore, because the outlet angle of the inducer 300 blades aligns with the inlet angle of the rotating impeller 400 blades, the two gases are less likely to generate a separation vortex when entering rotating impeller 400. Rotating impeller 400 increases the circumferential velocity of the two gases, increasing the probability of collision between the two gases, resulting in more uniform mixing and spatial distribution of the two gases.

[0039] In some embodiments, the mixing channel 200 is provided with an airflow outlet 210 , the rotating impeller 400 is connected to the rotating shaft 500 , and one end of the rotating shaft 500 extends to the airflow outlet 210 and is connected to a driving member.

[0040] One end of the mixing channel 200 is an air inlet for connection to the outlet 110 of the gas collection assembly 100. The other end of the mixing channel 200 is an air outlet 210 for allowing the gas drawn into the mixing channel 200 to flow out. The rotating impeller 400 is connected to a driving member via a rotating shaft 500. The driving member can be a motor, a cylinder, or a screw assembly, as long as it can drive the rotating impeller 400 to rotate.

[0041] Furthermore, the mixing channel 200 is provided with a sampling port 220 , and the sampling port 220 is used to connect to an external measuring device.

[0042] During implementation, the sampling port 220 is located after the rotating impeller 400 , that is, the gas to be mixed passes through the inducer 300 and the rotating impeller 400 in sequence, and a portion of the gas flows out through the air flow outlet 210 , while the other portion flows to the external measuring device through the sampling port 220 .

[0043] In some embodiments, the external measuring device refers to a device for measuring gas-related information. For example, the external measuring device may be a carbon dioxide gas concentration meter for measuring carbon dioxide gas concentration.

[0044] Example 2

[0045] In some optional embodiments, the present application also provides an exhaust gas overflow flow measurement device, including the gas mixing structure as described above.

[0046] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the structure and implementation principle of the exhaust gas overflow flow measurement device described above can refer to the corresponding structure and implementation principle in the aforementioned embodiment 1, and will not be repeated here.

[0047] In some optional embodiments, the gas collection assembly 100 includes a accommodating space composed of several mounting plates, the accommodating space is used to place the target device, and the mounting plate is provided with a first air inlet 120, a first air outlet 130 and an air inlet 140, and the first air inlet 120 and the first air outlet 130 are respectively used to cooperate with the inlet and outlet of the target device.

[0048] During implementation, the gas collection assembly 100 is composed of several mounting plates. For example, five mounting plates are provided as an example. The five mounting plates form a cube with one side open, and the cube is hollow inside for placing the target device.

[0049] It should be noted that the above-described gas collection assembly 100 comprising five mounting plates is merely an example of one embodiment of the present application and is not intended to be a specific limitation of the present application. In other embodiments, the number of mounting plates may also be other, such as two (conical) or six (square), without limitation.

[0050] In some embodiments, taking the AGSS waste gas treatment system as an example, the first air inlet 120 is connected to the inlet of the AGSS waste gas treatment system, and the first air outlet 130 is connected to the outlet of the AGSS waste gas treatment system. The inlet of the AGSS waste gas treatment system is used to connect to the anesthesia machine to extract and treat the exhaled waste gas from the anesthesia machine circuit. The outlet of the AGSS waste gas treatment system discharges the waste gas after the treatment process. During the waste gas treatment process of the AGSS waste gas treatment system, a certain amount of gas will overflow. The overflowed gas will be trapped in the storage space and then drawn into the mixing channel 200.

[0051] The gas collection assembly 100 is further equipped with an air inlet hole 140 , which can draw air into the accommodation space and let the air enter the mixing channel 200 together with the gas overflowing from the AGSS exhaust gas treatment system.

[0052] In some embodiments, the air inlet hole 140 may be a through-hole formed on the mounting plate. For example, if six mounting plates are used to form the square-shaped gas collection assembly 100 , the air inlet hole 140 may be formed on one of the mounting plates.

[0053] In some possible embodiments, the air inlet hole 140 may be an opening of a whole mounting plate. For example, five mounting plates are used to form a block-shaped gas collection assembly 100 , and the missing mounting plate of the block-shaped gas collection assembly 100 is the air inlet hole 140 .

[0054] When the rotary impeller 400 rotates, negative pressure is formed in the mixing channel 200, thereby sucking the gas overflowed from the AGSS exhaust gas treatment system in the gas collection assembly 100 and the air into the mixing channel 200 for mixing.

[0055] Furthermore, the mounting plate is further provided with a second air inlet 150, and the second air inlet 150 is used for introducing standard gas.

[0056] In practice, standard gas refers to a gas with specific flow characteristics. For example, it can be introduced into the chamber through second air inlet 150 at a rate of μL / min, where y represents a specific value, such as 1, 3, or 5, though this is not a limitation. Before measuring the flow rate of gas discharged or overflowed from the target device, standard gas can be introduced through second air inlet 150 to calibrate the data and improve measurement accuracy.

[0057] In some embodiments, the first air inlet 120 , the second air inlet 150 , and the first air outlet 130 can all be closed or opened to achieve on-off control of the air flow.

[0058] In some embodiments, taking the target device as an AGSS exhaust gas treatment system as an example, the working and implementation principles of the exhaust gas overflow flow measurement device provided in this application are as follows:

[0059] The AGSS waste gas treatment system is placed in the gas collection component 100, the waste gas inlet of the AGSS waste gas treatment system is placed in the first air inlet 120 (for connection with the anesthesia machine), the waste gas outlet of the AGSS waste gas treatment system is placed in the first air outlet 130 (the first air outlet 130 is set with a certain negative pressure), and the natural overflow port of the AGSS waste gas treatment system is located in the gas collection component 100.

[0060] The rotating impeller 400 of the mixing channel 200 generates a certain negative pressure when rotating, so that the air in the atmospheric environment naturally enters from the air inlet hole 140, and the exhaust gas in the AGSS exhaust treatment system will not be sucked out from the natural overflow port.

[0061] ①. Close the first air inlet 120 (i.e., the inlet of the AGSS exhaust gas treatment system) and the second air inlet 150 (the calibration gas entry point), and do not allow any gas to enter. The air entering through the air inlet 140 will pass through the mixing channel 200, the sampling port 220 (the carbon dioxide gas sampling and testing point, connected to the carbon dioxide gas concentration meter), and the air flow outlet 210 (the outlet of the measuring device). When passing through the sampling port 220, the carbon dioxide gas concentration meter will measure the carbon dioxide gas concentration of the air entering through the air inlet 140, which is also the initial data.

[0062] ②. The first air inlet 120 is still closed and no gas is introduced. Air is naturally introduced into the air inlet 140, and at the same time, μ L / min (for example, 1 L / min or 2 L / min) of carbon dioxide gas is continuously introduced into the second air inlet 150. Then the air and carbon dioxide gas will pass through the mixing channel 200, the sampling port 220, and the air flow outlet 210 in sequence. Among them, the mixing channel 200 is provided with an inducer 300 and a rotating impeller 400. When the two gases pass through the mixing channel 200, they first enter the inducer 300 of the mixing channel 200. Because the flow path of the inducer 300 has a certain curvature, the two gases will mix to a certain extent after passing through and produce pre-swirl. The blade outlet angle of inducer 300 is aligned with the blade inlet angle of impeller 400. Therefore, when the two gases enter impeller 400, separation vortices are less likely to form. Impeller 400 increases the circumferential velocity of the two gases, increasing the probability of collision between the two gases, allowing the two gases to mix more evenly and achieve a more uniform spatial distribution. After mixing through mixing channel 200, the mixed gas flows through sampling port 220. At this point, the CO2 concentration meter measures the CO2 concentration of the mixed gas and compares it with the initial data. This step is data calibration.

[0063] ③. Close the second air inlet 150 and simultaneously introduce z L / min (z represents a constant and relatively small value, such as 0.1, 0.3, or 0.5) of carbon dioxide gas through the first air inlet 120 and out through the first air outlet 130 (i.e., the exhaust outlet of the AGSS exhaust gas treatment system). At this point, no carbon dioxide will escape from the natural overflow of the AGSS exhaust gas treatment system. Slowly adjust the carbon dioxide flow rate from the first air inlet 120 to the maximum allowable limit of the AGSS exhaust gas treatment system. A certain amount of carbon dioxide will now escape from the natural overflow of the AGSS exhaust gas treatment system. Air entering through the air inlet 140 and carbon dioxide escaping from the natural overflow will enter the mixing channel 200 together. Similarly to step ② above, the two gases will mix evenly in the mixing channel 200 and then pass through the sampling port 220. The carbon dioxide concentration meter will measure the carbon dioxide concentration of the mixed gas and compare it with the initial data to determine whether the exhaust gas flow rate from the natural overflow of the AGSS exhaust gas treatment system meets the specified flow rate.

[0064] The gas collection component 100 of the present application is used to collect the gas discharged by the target device, and then under the action of the rotating impeller 400, the gas and air collected by the gas collection component 100 are sucked into the mixing channel 200. The two gases flow through the inducer 300 in the mixing channel 200 to produce pre-rotation, thereby mixing the two gases to a certain extent. After the gas further flows through the rotating impeller 400, the probability of collision between the two gases is increased, so that the two gases can be evenly mixed, thereby improving the detection accuracy of subsequent gas flow.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas mixing structure, characterized in that: include: A gas collection component for collecting gas exhausted from the target device; a mixing channel connected to the output port of the gas collection assembly; as well as an inducer and a rotating impeller disposed in the mixing channel; The rotating impeller is connected to the driving member and is used to rotate under the drive of the driving member, so that the gas and air collected by the gas collection assembly flow into the mixing channel and are evenly mixed after flowing through the inducer and the rotating impeller.

2. The gas mixing structure according to claim 1, wherein: The inducer is fixedly installed in the mixing channel.

3. The gas mixing structure according to claim 1 or 2, characterized in that: The blade outlet angle of the inducer is consistent with the blade outlet angle of the rotating impeller.

4. The gas mixing structure according to claim 1, wherein: The mixing channel is provided with an air flow outlet, the rotating impeller is connected to a rotating shaft, and one end of the rotating shaft extends to the air flow outlet and is connected to the driving member.

5. The gas mixing structure according to claim 1, wherein: The mixing channel is provided with a sampling port, and the sampling port is used to be connected to an external measuring device.

6. An exhaust gas overflow flow measurement device, characterized in that: The method comprises the gas mixing structure according to any one of claims 1 to 5.

7. The exhaust gas overflow flow rate measuring device according to claim 6, characterized in that: The gas collection assembly includes a accommodating space composed of several mounting plates, wherein the accommodating space is used to place the target device, and the mounting plate is provided with a first air inlet, a first air outlet and an air inlet, wherein the first air inlet and the first air outlet are respectively used to cooperate with the inlet and outlet of the target device for connection.

8. The exhaust gas overflow flow rate measuring device according to claim 7, characterized in that: The mounting plate is further provided with a second air inlet hole, and the second air inlet hole is used for introducing standard gas.

Images