Integrated parallel multi-absorbent tank circulation type respirator

Abstract

The application relates to a one-piece parallel multi-absorbent tank circulation type respirator which comprises an outer shell, the outer shell comprises an outer shell body and an upper shell cover with a shell cover air inlet hole and a shell air inlet, a position adjusting knob is arranged at the top end of the shell cover air inlet hole, a carbon dioxide sensor is arranged on the inner wall, the two ends of the shell air inlet are respectively communicated with an exhalation bag and the shell cover air inlet hole, a shell air outlet communicated with the inhalation bag is arranged at the bottom of the outer shell body; hollow holes are arranged in the mounting bases fixed at the bottom of the outer shell body, seat through holes are arranged on the side walls of each mounting base, each hollow hole is communicated with the shell air outlet through the corresponding seat through hole, and each mounting base is arranged with an absorbent tank at the top; a manual multi-way switching valve assembly communicated with the shell cover air inlet hole and fixed with the position adjusting knob is arranged in the middle of the surface of the fixing base at the top of the plurality of parallel absorbent tanks with the same structure and size; a communication pipe butted with each through hole of the manual multi-way switching valve assembly is embedded on the fixing base, and the other end of the communication pipe is butted with the tank air inlet at the top of the corresponding absorbent tank.

Description

Technical Field

[0001] This invention relates to the field of circulating respirator technology, and in particular to an integrated parallel multi-absorbent tank circulating respirator. Background Technology

[0002] Typically, recirculating breathing apparatuses used for diving employ an absorbent canister to purify the carbon dioxide in the wearer's exhaled breath. The carbon dioxide absorbent is usually in granular form, dispersed within the canister. During use, even if the maximum usage time of the absorbent is not reached after a single dive, it is impossible to completely distinguish between saturated and unsaturated absorbent. From a safety perspective, this necessitates replacing the entire absorbent, inevitably leading to significant waste. Furthermore, improper filling of the absorbent canister can cause cross-contamination, resulting in low absorbent utilization or even complete absorbent failure, greatly impacting the wearer's performance. Additionally, during diving, the existing absorbent canister is in direct contact with water, which carries away heat through conduction and convection, further reducing the utilization rate of the absorbent within the canister. Summary of the Invention

[0003] This invention addresses the problems and shortcomings of existing technologies by providing an integrated parallel multi-absorbent tank circulating respirator.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This invention provides an integrated parallel multi-absorbent canister circulating respirator, including an exhalation bag, an inhalation bag, and a main controller. The feature is that it also includes an outer shell, which comprises an outer shell body and a detachable upper shell cover covering the top of the outer shell body. An air inlet is located at the center of the upper shell cover. A position adjustment knob is installed at the top of the air inlet, and a carbon dioxide sensor is installed on the inner wall. An air outlet is also located on the upper shell cover, with its two ends connected to the exhalation bag and the air inlet of the upper shell cover, respectively. An air outlet, connected to the inhalation bag, is located at the center of the bottom of the outer shell body.

[0006] Multiple absorbent can mounting bases with hollow holes are fixed at the bottom of the outer shell, evenly distributed around the air outlet of the shell. Each absorbent can mounting base has a seat through hole on its side wall near the air outlet of the shell. Each hollow hole communicates with the air outlet of the shell through the corresponding seat through hole. The top of each absorbent can mounting base can be detachably fixed with an absorbent can. The air outlet at the bottom of each absorbent can is connected to the corresponding hollow hole. The multiple absorbent cans have the same structure and size, are connected in parallel, and have the same top. The total capacity of the multiple absorbent cans is the same as the total capacity of existing absorbent cans.

[0007] The top of the multiple absorbent tanks is detachably fixed to a fixed base. A manual multi-way switching valve assembly is fixed at the middle position of the surface of the fixed base, which communicates with the air inlet of the shell cover and is fixed to the position adjustment knob. A connecting pipe is embedded on the fixed base and is connected to each port of the manual multi-way switching valve assembly. The other end of each connecting pipe is connected to the tank air inlet on the top of the corresponding absorbent tank.

[0008] The carbon dioxide sensor is used to detect the carbon dioxide concentration in the gas transmitted from the exhalation bag. The main controller is used to receive the carbon dioxide concentration value and analyze whether the carbon dioxide concentration value is higher than a preset threshold. If it is, an alarm message is issued to remind the wearer to adjust the manual multi-way switching valve assembly by rotating the position adjustment knob. This allows the gas in the exhalation bag to flow sequentially through the shell inlet, the shell cover inlet, the open port in the manual multi-way switching valve assembly, the corresponding connecting pipe, the corresponding unused absorbent canister, the corresponding absorbent canister mounting base, and the shell outlet, so that clean gas flows into the inhalation bag for the wearer to inhale.

[0009] The present invention also provides an integrated parallel multi-absorbent canister circulating respirator, including an exhalation bag, an inhalation bag, and a main controller. The feature is that it also includes a shell, the shell including a shell body and a shell top cover that is detachably covered on the top of the shell body. The shell top cover has a shell air inlet at the middle position that is directly connected to the exhalation bag. A carbon dioxide sensor is installed on the inner wall of the shell air inlet. The shell body has a shell air outlet at the middle position at the bottom of the shell body that is connected to the inhalation bag.

[0010] Multiple absorbent can mounting bases with hollow holes are fixed at the bottom of the outer shell, evenly distributed around the air outlet of the shell. Each absorbent can mounting base has a seat through hole on its side wall near the air outlet of the shell. Each hollow hole communicates with the air outlet of the shell through the corresponding seat through hole. The top of each absorbent can mounting base can be detachably fixed with an absorbent can. The air outlet at the bottom of each absorbent can is connected to the corresponding hollow hole. The multiple absorbent cans have the same structure and size, are connected in parallel, and have the same top. The total capacity of the multiple absorbent cans is the same as the total capacity of existing absorbent cans.

[0011] The top of the multiple absorbent tanks is detachably fixed to a fixed base. An electric multi-way switching valve assembly that communicates with the air inlet of the shell is fixed at the middle position of the surface of the fixed base. A connecting pipe is embedded in the fixed base and is connected to each port of the electric multi-way switching valve assembly. The other end of each connecting pipe is connected to the air inlet of the corresponding absorbent tank at the top.

[0012] The carbon dioxide sensor is used to detect the carbon dioxide concentration in the gas transmitted from the exhalation bag. The main controller is used to receive the carbon dioxide concentration value and analyze whether the carbon dioxide concentration value is higher than a preset threshold. If it is, the controller directly controls and adjusts the electric multi-port switching valve assembly so that the gas in the exhalation bag flows sequentially through the shell air inlet, the already opened port in the electric multi-port switching valve assembly, the corresponding connecting pipe, the corresponding unused absorbent canister, the corresponding absorbent canister mounting base, and the shell air outlet, so that clean gas flows into the inhalation bag for the wearer to inhale.

[0013] The positive and progressive effects of this invention are as follows:

[0014] In this invention, multiple absorbent tanks, such as three connected in parallel, are used. If the diving time has not reached the maximum usage time, only the used absorbent tanks need to be replaced, while the unused absorbent tanks do not need to be replaced and can continue to be used. Compared with the prior art, this can greatly save carbon dioxide absorbent.

[0015] This invention reduces the possibility of crossflow (or bridging) due to improper filling. If a single absorbent tank is used, crossflow due to improper filling will result in immediate failure. However, if multiple absorbent tanks, such as three, are used, and crossflow occurs in only one tank, the carbon dioxide concentration will rapidly increase after a short period of use. Divers can manually switch to the remaining absorbent tanks as needed, preventing immediate failure. The probability of crossflow occurring simultaneously in all three absorbent tanks is extremely low.

[0016] In this invention, the carbon dioxide absorbent has a higher absorption efficiency at higher temperatures. Therefore, in order to improve the absorption efficiency of the carbon dioxide absorbent, it is necessary to maintain a high temperature inside the absorbent tank. In this invention, a reinforced outer shell is added around multiple absorbent tanks connected in parallel. To further insulate the heat, the outer shell is designed as a hollow structure, which forms an air layer. An air layer is also formed between the internal absorbent tank and the outer shell, resulting in two air layers, which greatly improves the heat insulation effect.

[0017] Since water carries away heat through conduction and convection when diving using a respirator, the absorbent tank in this invention is made of a material with low thermal conductivity, such as polyoxymethylene (POM).

[0018] In this invention, after adding a flow guide hood inside each absorbent tank, the flow guide hood directs the airflow to the middle and side positions of the upper flow guide grid. This design ensures that the inward and outward flow paths of the airflow are of the same length, making the airflow through the carbon dioxide absorbent more evenly dispersed, which is more conducive to the utilization of the carbon dioxide absorbent and improves the absorption rate of the carbon dioxide absorbent.

[0019] In this invention, each absorbent canister is equipped with absorbent sponges located above and below the absorbent chamber to absorb moisture from exhaled air, prevent the carbon dioxide absorbent from clumping, facilitate the utilization of the carbon dioxide absorbent, and improve the absorption rate of the carbon dioxide absorbent.

[0020] In this invention, the oxygen from the oxygen cylinder and the mixed gas cylinder will carry a small amount of free oil molecules when it enters the exhalation bag. An anti-oil membrane is set up to absorb the small amount of free oil molecules in the gas transmitted from the exhalation bag and remove the small amount of free oil molecules in the gas. Attached Figure Description

[0021] Figure 1 This is a structural block diagram of the integrated parallel multi-absorbent tank circulating respirator of Embodiment 1 of the present invention.

[0022] Figure 2-3 This is a perspective view of the integrated parallel multi-absorbent tank circulating respirator of Embodiment 1 of the present invention.

[0023] Figure 4 This is a cross-sectional view of the integrated parallel multi-absorbent tank circulating respirator of Embodiment 1 of the present invention.

[0024] Figure 5 for Figure 4 Sectional view of AA.

[0025] Figure 6 for Figure 4 Enlarged view of the manual multi-way switching valve assembly.

[0026] Figure 7 This is a cross-sectional view of the absorbent tank in Embodiment 1 of the present invention.

[0027] Figure 8 for Figure 7 BB section view.

[0028] Figure 9 for Figure 8 Enlarged view of the center fairing.

[0029] Figure 10 This is a schematic diagram of the internal structure of the integrated parallel multi-absorbent tank circulating respirator of Embodiment 1 of the present invention.

[0030] Figure 11 for Figure 10 Top view.

[0031] Figure 12 This is a cross-sectional view of the integrated parallel multi-absorbent tank circulating respirator of Embodiment 2 of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] For ease of description, only the parts relevant to the present invention are shown in the accompanying drawings. The terms "first," "second," etc., used in this invention are merely for the convenience of describing the technical solutions of the invention and do not have a specific limiting effect; they are all general references and do not constitute a limitation on the technical solutions of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Terms indicating positional relationships, such as "middle," "horizontal," "vertical," "longitudinal," "front," "rear," "left," "right," "inner," and "outer," are based on the positional relationships shown in the illustrated drawings and do not imply that the components referred to must be presented in the described positional relationships, and do not constitute a limitation on the technical solutions of the present invention. Example 1

[0034] like Figure 1-11 As shown, this embodiment of the invention provides an integrated parallel multi-absorbent canister circulating respirator, including an exhalation bag, an inhalation bag, and a main controller, as well as a housing. The housing houses a manual multi-way switching valve assembly and multiple parallel absorbent canisters. Figure 1 The diagram shows three absorbent canisters connected in parallel: absorbent canister 1, absorbent canister 2, and absorbent canister 3. The gas flow pattern is as follows: exhaled gas — exhalation bag — manual multi-way switching valve assembly — absorbent canister (only one absorbent canister is working at a time) — inhalation bag.

[0035] like Figure 2-11As shown, the outer casing includes an outer casing 1 and a removable upper cover 2 that covers the top of the outer casing 1, such as the outer casing 1 being screwed to the upper cover 2. The upper cover 2 includes an integrally formed horizontal end cover 3 and a vertical end cover 4 located in the middle of the horizontal end cover 3 and protruding from the horizontal end cover 3. Both the vertical end cover 4 and the horizontal end cover 3 have openings from top to bottom to form an air inlet 5. A rotatable position adjustment knob 6 is installed on the top of the vertical end cover 4. An air inlet 7 is opened on the side wall of the vertical end cover 4. The two ends of the air inlet 7 are respectively connected to the exhalation bag and the air inlet 5 of the cover. The position adjustment knob 6 has a setting corresponding to the absorbent canister. The position adjustment knob 6 with settings has the structure of an existing position adjustment knob, such as the position adjustment knob 6 having settings corresponding to absorbent canister 1, absorbent canister 2 and absorbent canister 3, namely setting 1, setting 2 and setting 3. An air outlet 8, which is connected to the air intake bag, is opened at the bottom middle position of the outer shell 1.

[0036] Multiple hollow absorbent can mounting bases 9, each with a hollow hole, are fixed inside the bottom of the outer casing 1, evenly distributed around the casing vent 8. Each absorbent can mounting base 9 has a through hole 10 on its side wall near the casing vent 8. The hollow hole of each absorbent can mounting base 9 communicates with the casing vent 8 through the corresponding through hole 10. Absorbent cans 11 are detachably fixed to the top of each absorbent can mounting base 9 (e.g., the can outlet 102 at the bottom of the absorbent can 11 is inserted into the top of the absorbent can mounting base 9), and the can outlet 102 at the bottom of each absorbent can 11 aligns with the hollow hole of the corresponding absorbent can mounting base 9. Thus, the absorbent can 11 is connected to the casing vent 8 at the bottom of the outer casing 1 through the corresponding absorbent can mounting base 9. The multiple absorbent cans 11 have the same structure and size, are connected in parallel, and have flush tops. The total capacity of the multiple absorbent cans 11 is consistent with the total capacity of existing absorbent cans. For example, a certain respirator is designed with an absorbent tank volume of 3L, so it uses three absorbent tanks connected in parallel, each with a volume of 1L.

[0037] In this embodiment, a structure with three absorbent tanks connected in parallel is provided, with the three absorbent tanks evenly distributed along the circumference. Of course, if a structure with two absorbent tanks connected in parallel is used, the two absorbent tanks can be arranged side by side.

[0038] A fixed base 12 is detachably fixed to the top of multiple absorbent canisters 11 (e.g., the fixed base 12 is fitted onto the canister air inlet 101 on the top of multiple absorbent canisters 11). A manual multi-way switching valve assembly 13 is fixed at the middle position of the surface of the fixed base 12, which communicates with the air inlet 5 of the shell cover and is fixed to the position adjustment knob 6. A connecting pipe 14 is embedded on the fixed base 12, which is connected to each port of the manual multi-way switching valve assembly 13. The other end of each connecting pipe 14 is connected to the canister air inlet 101 on the top of the corresponding absorbent canister 11.

[0039] The manual multi-port switching valve assembly 13 includes a valve body 131 with multiple ports evenly distributed (e.g., the valve body 131 has three ports, corresponding to three absorbent tanks). A rotatable ball 132 with a certain degree of freedom is provided inside the valve body 131. The ball 132 has a hollow groove 133 that aligns with the air inlet 5 of the cover. A ball hole 134 that matches the port of the valve body 131 is also provided on the side wall of the ball 132. The ball hole 134 is connected to the hollow groove 133. Each port of the valve body 131 is connected to the corresponding connecting pipe 14. A positioning groove is provided at the middle position of the bottom of the valve body 131. A positioning pin 135 is fixed at the middle position of the bottom of the ball 132 and positioned in the positioning groove, so that the ball 132 can rotate along the axis without deflection. A valve stem 136 is fixed on the ball 132. The top of the valve stem 136 is fixed to the bottom of the position adjustment knob 6.

[0040] When the wearer rotates the position adjustment knob 6 to position 1, the valve stem 136 rotates axially accordingly. The gas in the exhalation bag flows sequentially through the shell inlet 7, the shell cover inlet 5, the hollow ball groove 133, the ball hole 134, the corresponding port on the valve body 131, and the corresponding connecting pipe 14 into the absorbent canister 1. Similarly, when the wearer rotates the position adjustment knob 6 to position 2, the gas in the exhalation bag enters the absorbent canister 2. When the wearer rotates the position adjustment knob 6 to position 3, the gas in the exhalation bag enters the absorbent canister 3.

[0041] A carbon dioxide sensor 15 is fixed on the inner wall of the vertical end cap 4. The carbon dioxide sensor 15 is used to detect the carbon dioxide concentration in the gas transmitted from the exhalation bag. The main controller is used to receive the carbon dioxide concentration value and analyze whether the carbon dioxide concentration value is higher than a preset threshold (such as 3%). If so, a warning message is issued to remind the wearer to rotate the position adjustment knob 6 to adjust the manual multi-way switching valve assembly 13 so that the manual multi-way switching valve assembly 13 is connected to the unused absorbent canister 11. That is, the gas in the exhalation bag flows sequentially through the shell air inlet 7, the shell cover air inlet 5, the already connected port in the manual multi-way switching valve assembly 13, the corresponding connecting pipe 14, the corresponding unused absorbent canister 11, the corresponding absorbent canister mounting base 9 (hollow hole and seat through hole 10), and the shell air outlet 8, and clean gas flows into the inhalation bag for the wearer to inhale.

[0042] In this embodiment, each absorbent can 11 includes a can body 103 and a can top cover 104 that is detachably attached to the top of the can body 103, such as the can body 103 and the can top cover 104 being screwed together. An air inlet 101 is provided at the middle position of the can top cover 104, and the air inlet 101 is connected to a corresponding connecting pipe 14. A flow guide is fixedly provided around the air inlet 101 at the middle position of the inner wall of the can top cover 101. The flow guide includes an inner flow guide body 105 and an outer flow guide body 106, both integrally designed and open at the top. The circumferential sidewalls of the inner flow guide body 105 and the outer flow guide body 106 are concentrically arranged. The bottom sealing surface of the inner guide shroud 105 and the bottom sealing surface of the outer guide shroud 106 are coplanar. The inner guide shroud 105 has inner guide shroud holes 108 evenly spaced along the circumferential direction on its circumferential sidewall, and a ring of anti-grease film 107 is attached to the inner circumferential sidewall. The outer guide shroud 106 has outer guide shroud holes 109 evenly spaced along the circumferential direction on its bottom sealing surface. The inner guide shroud holes 108 and the outer guide shroud holes 109 correspond one-to-one. The top of the tank 103 is fixed with an upper guide grid 110 and an upper absorbent sponge 111, both with evenly distributed guide holes, from top to bottom. The bottom is fixed with a lower guide grid 112 and a lower absorbent sponge 113, both with evenly distributed guide holes, from bottom to top. The upper guide grid 110 and the upper absorbent sponge 111 are closely attached, as are the lower guide grid 112 and the lower absorbent sponge 113. An absorbent cavity 114 filled with absorbent is formed between the upper and lower absorbent sponges 111 and 113. The diameter of the overall circle formed by the outer guide hood hole 109 is equal to the diameter of the upper guide grid 110. The diameter of the upper guide grid 110 is half that of the outer guide grid 109, and all the outer guide grid holes 109 face the upper guide grid 110. This ensures that the gas in the connecting pipe 14 flows through the tank inlet 101, the anti-grease film 107, the inner guide grid hole 108, and the outer guide grid hole 109 in sequence. The inward and outward flow paths are of the same length, so that the gas flows evenly to the middle and sides of the upper guide grid 110. After passing through the upper absorbent sponge 111, the absorbent chamber 114, the lower absorbent sponge 113, the lower guide grid 112, and the tank outlet 102, clean gas that has been degreased, carbon dioxide, and moisture is obtained.

[0043] Since water carries away heat through conduction and convection when diving using a respirator, in this embodiment, the tank 103 is made of a material with low thermal conductivity, such as polyoxymethylene (POM).

[0044] In this embodiment, the carbon dioxide absorbent has a higher absorption efficiency at higher temperatures. Therefore, in order to improve the absorption efficiency of the carbon dioxide absorbent, it is necessary to maintain a higher temperature inside the absorbent tank 11. In this embodiment, the outer shell is reinforced around the three parallel absorbent tanks 11. To further insulate the heat, the outer shell 1 is a hollow shell, forming a double-layer shell structure. The hollow structure of the double-layer shell constitutes an air layer, and an air layer is also formed between the inner absorbent tank 11 and the outer shell 1. Thus, there are two air layers, which greatly improves the heat insulation effect.

[0045] In this embodiment, multiple absorbent tanks 11 are connected in parallel. If the diving time has not reached the maximum usage time, only the used absorbent tanks can be replaced, and the unused absorbent tanks can be used later. Compared with the prior art, this can greatly save carbon dioxide absorbent.

[0046] In this embodiment, the possibility of crossflow (or bridging) due to improper filling is reduced. If a single absorbent tank is used, crossflow due to improper filling will result in immediate failure. If multiple absorbent tanks, such as three, are used, and crossflow occurs in only one tank, the carbon dioxide concentration will rapidly increase after a short period of use. Divers can manually switch to the remaining absorbent tanks as needed, preventing immediate failure. The probability of crossflow occurring simultaneously in all three absorbent tanks is extremely low.

[0047] In this embodiment, after adding a flow guide hood inside each absorbent tank 11, the flow guide hood directs the airflow to the middle and side positions of the upper flow guide grid 110. This design makes the inward and outward flow path lengths the same, making the airflow through the carbon dioxide absorbent more evenly dispersed, which is more conducive to the utilization of the carbon dioxide absorbent and improves the absorption rate of the carbon dioxide absorbent.

[0048] In this invention, each absorbent canister 11 is provided with absorbent sponges (upper absorbent sponge 111 and lower absorbent sponge 113) at the upper and lower positions of the absorbent chamber 114, respectively, to absorb moisture in exhaled air, prevent carbon dioxide absorbent from clumping, facilitate the utilization of carbon dioxide absorbent, and improve the absorption rate of carbon dioxide absorbent.

[0049] In this invention, the oxygen from the oxygen cylinder and the mixed gas cylinder will carry a small amount of free oil molecules when it enters the exhalation bag. An anti-oil membrane 107 is provided to absorb the small amount of free oil molecules in the gas transmitted from the exhalation bag and remove the small amount of free oil molecules in the gas. Example 2

[0050] like Figure 12As shown, this embodiment of the invention provides an integrated parallel multi-absorbent canister circulating respirator. This embodiment changes the manual control switching method of Embodiment 1 to an electric control switching method. Components identical to those in Embodiment 1 are named with the same names and have the same numerical markings.

[0051] The integrated parallel multi-absorbent canister recirculating respirator includes an exhalation bag, an inhalation bag, and a main controller, as well as a housing. The housing includes a housing body 1 and a removable top cover 2 that covers the top of the housing body 1, such as by screwing the housing body 1 and the top cover 2 together. An air inlet 16, directly communicating with the exhalation bag, is located at the center of the top cover 2. A carbon dioxide sensor 15 is installed on the inner wall of the air inlet 16. An air outlet 8, communicating with the inhalation bag, is located at the center of the bottom of the housing body 1.

[0052] Multiple absorbent can mounting bases 9 with hollow holes are fixed inside the bottom of the outer shell 1, evenly distributed around the shell air outlet 8. Each absorbent can mounting base 9 has a seat through hole 10 on its side wall near the shell air outlet 8. The hollow hole of each absorbent can mounting base 9 communicates with the shell air outlet 8 through the corresponding seat through hole 10. The top of each absorbent can mounting base 9 can be detachably fixed with an absorbent can 11, and the can outlet 102 at the bottom of each absorbent can 11 is connected to the hollow hole of the corresponding absorbent can mounting base 9. The multiple absorbent cans 11 have the same structure and size, are connected in parallel, and have the same top. The total capacity of the multiple absorbent cans 11 is the same as the total capacity of existing absorbent cans.

[0053] A mounting base 12 is detachably fixed to the top of multiple absorbent tanks 11. An electrically powered multi-way switching valve assembly 17, communicating with the air inlet 16 of the shell, is fixed at the middle position of the surface of the mounting base 12. A connecting pipe 14 is embedded in the mounting base 12, which is connected to each port of the electrically powered multi-way switching valve assembly 17. The other end of each connecting pipe 14 is connected to the air inlet 101 of the corresponding absorbent tank 11 at the top. If there are 3 absorbent tanks 11, the electrically powered multi-way switching valve assembly 17 can be an existing electrically powered three-way ball valve.

[0054] The carbon dioxide sensor 15 is used to detect the carbon dioxide concentration in the gas transmitted from the exhalation bag. The main controller is used to receive the carbon dioxide concentration value and analyze whether the carbon dioxide concentration value is higher than a preset threshold. If it is, it directly controls and adjusts the electric multi-port switching valve assembly 17 so that the gas in the exhalation bag flows sequentially through the shell air inlet 16, the already opened port in the electric multi-port switching valve assembly 17, the corresponding connecting pipe 14, the corresponding unused absorbent canister 11, the corresponding absorbent canister mounting base 9, and the shell air outlet 8, so that clean gas flows into the inhalation bag for the wearer to inhale.

[0055] The specific structure of the absorbent tank in this embodiment is the same as that of the absorbent tank in Embodiment 1.

[0056] Since water carries away heat through conduction and convection when diving using a respirator, in this embodiment, the tank 103 is made of a material with low thermal conductivity, such as polyoxymethylene (POM).

[0057] In this embodiment, the carbon dioxide absorbent has a higher absorption efficiency at higher temperatures. Therefore, in order to improve the absorption efficiency of the carbon dioxide absorbent, it is necessary to maintain a higher temperature inside the absorbent tank. In this embodiment, the outer shell is reinforced around the three parallel absorbent tanks 11. To further insulate the heat, the outer shell 1 is a hollow shell, forming a double-layer shell structure. The hollow structure of the double-layer shell constitutes an air layer, and an air layer is also formed between the inner absorbent tank 11 and the outer shell 1. Thus, there are two air layers, which greatly improves the heat insulation effect.

[0058] In this embodiment, multiple absorbent tanks are connected in parallel. If the diving time has not reached the maximum usage time, only the used absorbent tanks can be replaced, and the unused absorbent tanks can be used later. Compared with the prior art, this can greatly save carbon dioxide absorbent.

[0059] In this embodiment, the possibility of crossflow (or bridging) due to improper filling is reduced. If a single absorbent tank is used, crossflow due to improper filling will result in immediate failure. If multiple absorbent tanks, such as three, are used, and crossflow occurs in only one tank, the carbon dioxide concentration will rapidly increase after a short period of use. Divers can manually switch to the remaining absorbent tanks as needed, preventing immediate failure. The probability of crossflow occurring simultaneously in all three absorbent tanks is extremely low.

[0060] In this embodiment, after adding a flow guide hood inside each absorbent tank 11, the flow guide hood directs the airflow to the middle and side positions of the upper flow guide grid 110. This design makes the inward and outward flow path lengths the same, making the airflow through the carbon dioxide absorbent more evenly dispersed, which is more conducive to the utilization of the carbon dioxide absorbent and improves the absorption rate of the carbon dioxide absorbent.

[0061] In this invention, each absorbent canister 11 is provided with absorbent sponges (upper absorbent sponge 111 and lower absorbent sponge 113) at the upper and lower positions of the absorbent chamber 114, respectively, to absorb moisture in exhaled air, prevent carbon dioxide absorbent from clumping, facilitate the utilization of carbon dioxide absorbent, and improve the absorption rate of carbon dioxide absorbent.

[0062] In this invention, the oxygen from the oxygen cylinder and the mixed gas cylinder will carry a small amount of free oil molecules when it enters the exhalation bag. An anti-oil membrane 107 is provided to absorb the small amount of free oil molecules in the gas transmitted from the exhalation bag and remove the small amount of free oil molecules in the gas.

[0063] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An integrated parallel multi-absorbent canister circulating respirator, comprising an exhalation bag, an inhalation bag, and a main controller, characterized in that, It also includes an outer shell, which includes an outer shell body and a shell top cover that can be detachably covering the top of the outer shell body. An air inlet is provided in the middle of the shell top cover. A position adjustment knob is installed at the top of the shell top cover air inlet and a carbon dioxide sensor is installed on the inner wall. An air inlet is also provided on the shell top cover. The two ends of the air inlet are respectively connected to the exhalation bag and the shell top air inlet. An air outlet is provided in the middle of the bottom of the outer shell body and is connected to the inhalation bag. Multiple absorbent can mounting bases with hollow holes are fixed at the bottom of the outer shell, evenly distributed around the air outlet of the shell. Each absorbent can mounting base has a seat through hole on its side wall near the air outlet of the shell. Each hollow hole communicates with the air outlet of the shell through the corresponding seat through hole. The top of each absorbent can mounting base can be detachably fixed with an absorbent can. The air outlet at the bottom of each absorbent can is connected to the corresponding hollow hole. The multiple absorbent cans have the same structure and size, are connected in parallel, and have the same top. The total capacity of the multiple absorbent cans is the same as the total capacity of existing absorbent cans. The top of the multiple absorbent tanks is detachably fixed to a fixed base. A manual multi-way switching valve assembly is fixed at the middle position of the surface of the fixed base, which communicates with the air inlet of the shell cover and is fixed to the position adjustment knob. A connecting pipe is embedded on the fixed base and is connected to each port of the manual multi-way switching valve assembly. The other end of each connecting pipe is connected to the tank air inlet on the top of the corresponding absorbent tank. The carbon dioxide sensor is used to detect the carbon dioxide concentration in the gas transmitted from the exhalation bag. The main controller is used to receive the carbon dioxide concentration value and analyze whether the carbon dioxide concentration value is higher than a preset threshold. If it is, an alarm message is issued to remind the wearer to adjust the manual multi-way switching valve assembly by rotating the position adjustment knob. This allows the gas in the exhalation bag to flow sequentially through the shell inlet, the shell cover inlet, the open port in the manual multi-way switching valve assembly, the corresponding connecting pipe, the corresponding unused absorbent canister, the corresponding absorbent canister mounting base, and the shell outlet, so that clean gas flows into the inhalation bag for the wearer to inhale. Each absorbent can includes a can body and a removable top cover over the can body. An air inlet is located at the center of the top cover and is connected to a corresponding connecting pipe. A flow guide is fixedly installed around the air inlet at the center of the inner wall of the top cover. An anti-grease film is provided between the inner wall of the top cover and the flow guide. From top to bottom, an upper flow guide grid with evenly distributed flow holes and an upper absorbent sponge are fixedly installed on the top of the can body; from bottom to top, a lower flow guide grid with evenly distributed flow holes and a lower absorbent sponge are fixedly installed on the bottom. The upper and lower absorbent sponges are connected... An absorbent chamber filled with absorbent is formed. The guide hood is provided with an outer guide hood hole facing the upper guide grid. The diameter of the outer guide hood hole is half the diameter of the upper guide grid, and all the outer guide hood holes face the upper guide grid. This ensures that the gas in the connecting pipe flows through the tank inlet, the anti-grease film, and the outer guide hood hole in sequence, and the inward and outward flow paths are of the same length. This allows the gas to flow evenly to the middle and sides of the upper guide grid, and then through the upper absorbent sponge, the absorbent chamber, the lower absorbent sponge, the lower guide grid, and the tank outlet to obtain clean gas after the removal of grease, carbon dioxide, and moisture.

2. The integrated parallel multi-absorbent canister circulating respirator as described in claim 1, characterized in that, The upper end cover of the shell includes an integrally formed horizontal end cover and a vertical end cover located in the middle of the horizontal end cover and protruding from the horizontal end cover. Both the vertical end cover and the horizontal end cover have openings in the middle to form air inlets for the shell cover. A position adjustment knob is installed on the top of the vertical end cover. A carbon dioxide sensor is fixed on the inner wall of the vertical end cover. An air inlet for the shell is opened on the side wall of the vertical end cover. The position adjustment knob has positions that correspond one-to-one with the absorbent tank.

3. The integrated parallel multi-absorbent canister circulating respirator as described in claim 2, characterized in that, The manual multi-port switching valve assembly includes a valve body with multiple ports evenly spaced. A rotatable ball is disposed within the valve body. The ball has a hollow groove that aligns with the air inlet of the cover. A ball hole matching the valve body port is also formed on the side wall of the ball. The ball hole communicates with the hollow groove. Each port of the valve body is connected to a corresponding connecting pipe. A positioning groove is formed at the middle of the bottom of the valve body. A positioning pin is fixed at the middle of the bottom of the ball and positioned within the positioning groove. A valve stem is fixed on the ball, and the top of the valve stem is fixed to the bottom of the position adjustment knob.

4. The integrated parallel multi-absorbent canister circulating respirator as described in claim 1, characterized in that, The flow guide includes an inner flow guide body and an outer flow guide body, which are designed as a single unit and have an open top. The circumferential sidewalls of the inner flow guide body and the outer flow guide body are concentrically arranged. The bottom sealing surface of the inner flow guide body and the bottom sealing surface of the outer flow guide body are coplanar. The circumferential sidewall of the inner flow guide body has evenly spaced inner flow guide holes along the circumferential direction, and a ring of anti-grease film is attached to the inner circumferential sidewall. The bottom sealing surface of the outer flow guide body has evenly spaced outer flow guide holes that are directly opposite the upper flow guide grid along the circumferential direction. The inner flow guide holes and the outer flow guide holes correspond one-to-one, so that the gas in the connecting pipe flows through the tank inlet, the anti-grease film, the inner flow guide holes, and the outer flow guide holes in sequence, and the flow path lengths inward and outward are the same, thereby making the gas flow evenly to the middle and sides of the upper flow guide grid.

5. The integrated parallel multi-absorbent canister circulating respirator as described in claim 1, characterized in that, The upper guide grille and the upper absorbent sponge are arranged in close contact, and the lower guide grille and the lower absorbent sponge are arranged in close contact.

6. The integrated parallel multi-absorbent canister circulating respirator as described in claim 1, characterized in that, The tank is made of polyoxymethylene, a material with low thermal conductivity.

7. The integrated parallel multi-absorbent canister circulating respirator as described in claim 1, characterized in that, The outer shell is a hollow shell, forming a double-layer shell structure.

8. An integrated parallel multi-absorbent canister circulating respirator, comprising an exhalation bag, an inhalation bag, and a main controller, characterized in that, It also includes an outer shell, which includes an outer shell body and a shell top cover that is detachably covering the top of the outer shell body. An air inlet that communicates directly with the exhalation bag is opened at the middle position of the shell top cover. A carbon dioxide sensor is installed on the inner wall of the shell air inlet. An air outlet that communicates with the inhalation bag is opened at the middle position of the bottom of the outer shell body. Multiple absorbent can mounting bases with hollow holes are fixed at the bottom of the outer shell, evenly distributed around the air outlet of the shell. Each absorbent can mounting base has a seat through hole on its side wall near the air outlet of the shell. Each hollow hole communicates with the air outlet of the shell through the corresponding seat through hole. The top of each absorbent can mounting base can be detachably fixed with an absorbent can. The air outlet at the bottom of each absorbent can is connected to the corresponding hollow hole. The multiple absorbent cans have the same structure and size, are connected in parallel, and have the same top. The total capacity of the multiple absorbent cans is the same as the total capacity of existing absorbent cans. The top of the multiple absorbent tanks is detachably fixed to a fixed base. An electric multi-way switching valve assembly that communicates with the air inlet of the shell is fixed at the middle position of the surface of the fixed base. A connecting pipe is embedded in the fixed base and is connected to each port of the electric multi-way switching valve assembly. The other end of each connecting pipe is connected to the air inlet of the corresponding absorbent tank at the top. The carbon dioxide sensor is used to detect the carbon dioxide concentration in the gas transmitted from the exhalation bag. The main controller is used to receive the carbon dioxide concentration value and analyze whether the carbon dioxide concentration value is higher than a preset threshold. If it is, the controller directly controls and adjusts the electric multi-port switching valve assembly so that the gas in the exhalation bag flows sequentially through the shell air inlet, the already opened port in the electric multi-port switching valve assembly, the corresponding connecting pipe, the corresponding unused absorbent canister, the corresponding absorbent canister mounting base, and the shell air outlet, so that clean gas flows into the inhalation bag for the wearer to inhale. Each absorbent can includes a can body and a removable top cover over the can body. An air inlet is located at the center of the top cover and is connected to a corresponding connecting pipe. A flow guide is fixedly installed around the air inlet at the center of the inner wall of the top cover. An anti-grease film is provided between the inner wall of the top cover and the flow guide. From top to bottom, an upper flow guide grid with evenly distributed flow holes and an upper absorbent sponge are fixedly installed on the top of the can body; from bottom to top, a lower flow guide grid with evenly distributed flow holes and a lower absorbent sponge are fixedly installed on the bottom. The upper and lower absorbent sponges are connected... An absorbent chamber filled with absorbent is formed. The guide hood is provided with an outer guide hood hole facing the upper guide grid. The diameter of the outer guide hood hole is half the diameter of the upper guide grid, and all the outer guide hood holes face the upper guide grid. This ensures that the gas in the connecting pipe flows through the tank inlet, the anti-grease film, and the outer guide hood hole in sequence, and the inward and outward flow paths are of the same length. This allows the gas to flow evenly to the middle and sides of the upper guide grid, and then through the upper absorbent sponge, the absorbent chamber, the lower absorbent sponge, the lower guide grid, and the tank outlet to obtain clean gas after the removal of grease, carbon dioxide, and moisture.

9. The integrated parallel multi-absorbent canister circulating respirator as described in claim 8, characterized in that, The flow guide includes an inner flow guide body and an outer flow guide body, which are designed as a single unit and have an open top. The circumferential sidewalls of the inner flow guide body and the outer flow guide body are concentrically arranged. The bottom sealing surface of the inner flow guide body and the bottom sealing surface of the outer flow guide body are coplanar. The circumferential sidewall of the inner flow guide body has evenly spaced inner flow guide holes along the circumferential direction, and a ring of anti-grease film is attached to the inner circumferential sidewall. The bottom sealing surface of the outer flow guide body has evenly spaced outer flow guide holes that are directly opposite the upper flow guide grid along the circumferential direction. The inner flow guide holes and the outer flow guide holes correspond one-to-one, so that the gas in the connecting pipe flows through the tank inlet, the anti-grease film, the inner flow guide holes, and the outer flow guide holes in sequence, and the flow path lengths inward and outward are the same, thereby making the gas flow evenly to the middle and sides of the upper flow guide grid.

10. The integrated parallel multi-absorbent canister circulating respirator as described in claim 8, characterized in that, The upper guide grille and the upper absorbent sponge are arranged in close contact, and the lower guide grille and the lower absorbent sponge are arranged in close contact.

11. The integrated parallel multi-absorbent canister circulating respirator as described in claim 8, characterized in that, The tank is made of polyoxymethylene, a material with low thermal conductivity.

12. The integrated parallel multi-absorbent canister circulating respirator as described in claim 8, characterized in that, The outer shell is a hollow shell, forming a double-layer shell structure.

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