Multi-gas generator

Abstract

The utility model relates to the technical field of gas generators, and provides a multi-gas generator which comprises a basic module and an extensible module. The basic module comprises an air pump, a multi-stage filter, a gas storage tank and a first gas regulating valve; the extensible module comprises a gas separation membrane, a nitrogen gas storage tank, an oxygen gas storage tank and a second gas regulating valve; the basic module is detachably connected with the extensible module. Three gases of dry air, nitrogen and oxygen are output as required through a single device, and multiple traditional devices are replaced. The basic module is detachably connected with the extensible module, independent or cooperative operation can be supported, and the purchase and maintenance cost is reduced. By dynamically adjusting the airflow path and flow, the equipment efficiency is optimized, and manual intervention is reduced. The extensible module can be externally connected with an existing compressed air system, the reuse rate of equipment is improved, the problems that a traditional gas generator is single in function and poor in expansibility are solved, and an efficient, flexible and economical gas supply solution is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas generators, in particular to a multi-gas generator. BACKGROUND

[0002] A gas generator is a device used to produce specific gases, its core function is to generate the required gas through chemical reaction, physical decomposition or storage release, widely used in industrial, medical, transportation and safety fields.

[0003] For example, in the automotive safety system, the gas generator produces a large amount of nitrogen gas by rapidly burning solid fuel, instantly inflating the safety airbag to protect the passengers; the medical field uses electrolysis of water or chemical decomposition technology to produce high-purity oxygen for breathing support or treatment; in industrial production, gas generators can provide protective gas for welding and cutting, or inert gas filling in food packaging to extend shelf life. Its design focuses on reliability, response speed and safety, and some models also have portability and reusability features, by precisely controlling the reaction conditions to ensure the stability and purity of the gas output, to meet the professional needs of different scenarios.

[0004] Currently, the gas generators commonly used in laboratories cannot produce dry air, high-purity nitrogen and high-purity oxygen at the same time or flexibly according to actual needs. This means that if users need multiple gases to meet different experimental or operational needs, they must purchase and install multiple independent gas generator devices, significantly increasing the user's purchase cost and maintenance cost, and these independent gas generator modules lack compatibility and reusability, cannot achieve resource sharing and function expansion. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a multi-gas generator to solve the problem that the existing gas generator cannot produce dry air, nitrogen and oxygen separately or simultaneously.

[0006] In order to achieve the above purpose, the utility model provides a multi-gas generator, comprising: a basic module and an extensible module;

[0007] The basic module comprises an air pump, a multi-stage filter, a gas tank and a first gas regulating valve;

[0008] The air pump is fixed on one side of the bottom of the basic module, the multi-stage filter is arranged on one side of the outlet of the air pump, the water trap is arranged between the multi-stage filter and the air pump, the inlet of the water trap is communicated with the outlet of the air pump, the outlet of the water trap is communicated with the inlet of the multi-stage filter, and the inlet of the air pump is connected with an external air source;

[0009] The air tank is fixed on the side of the multi-stage filter away from the air pump, the inlet of the air tank is connected with the outlet of the multi-stage filter, and the first gas regulating valve is fixed between the inlet of the air tank and the outlet of the multi-stage filter;

[0010] The expandable module comprises a gas separator, a nitrogen-oxygen air tank and a second gas regulating valve;

[0011] The gas separator is fixed on the inlet of the expandable module, and a gas separation membrane in a thin film structure is arranged in the gas separator;

[0012] The nitrogen-oxygen air tank is detachably arranged on the expandable module at an end opposite to the gas separator, and the inlet of the nitrogen-oxygen air tank is communicated with the outlet of the gas separator;

[0013] The second gas regulating valve is communicated with the outlet of the nitrogen-oxygen air tank;

[0014] The basic module and the expandable module are detachably connected;

[0015] When the basic module and the expandable module are connected, the outlet of the multi-stage filter is connected with the inlet of the gas separator.

[0016] In a possible implementation, the device further comprises a gas path connecting unit, the gas path connecting unit comprising a drainage pipeline, an air passage pipeline and an electromagnetic valve switch;

[0017] The multi-stage filter comprises a primary filter and a secondary filter;

[0018] The primary filter is arranged at the outlet of the air pump, and the secondary filter is arranged on the side of the primary filter away from the air pump;

[0019] The water separator, the primary filter and the secondary filter are each provided with an inlet, an outlet and a drainage port;

[0020] The outlet of the water separator is communicated with the inlet of the primary filter through the air passage pipeline, the outlet of the primary filter is communicated with the inlet of the secondary filter through the air passage pipeline, and the outlet of the secondary filter is communicated with the inlet of the electromagnetic valve switch through the air passage pipeline;

[0021] The inlet of the electromagnetic valve switch is further connected with the drainage ports of the water separator, the primary filter and the secondary filter through the drainage pipeline;

[0022] The outlet of the electromagnetic valve switch comprises a drainage outlet, an exhaust outlet and an air passage outlet, and the air passage outlet is connected with the inlet of the air tank and / or the inlet of the gas separator;

[0023] The water outlet is used for water drainage, the air outlet is used for air exhaust; the electromagnetic valve switch is used for controlling the opening or closing of the water outlet, the air outlet and the vent.

[0024] In an implementation, the control unit comprises a PLC controller, a pressure sensor and an external display screen.

[0025] The PLC controller is electrically connected with the electromagnetic valve switch and the external display screen, and is used for controlling the opening or closing of the electromagnetic valve switch.

[0026] The pressure sensor is fixed at the outlet position of the secondary filter, and is used for detecting the input gas flow.

[0027] The PLC controller is electrically connected with the pressure sensor and the first gas regulating valve switch.

[0028] In an implementation, the base module further comprises a cooling fan.

[0029] The cooling fan is arranged on the side of the air pump away from the multi-stage filter.

[0030] In an implementation, the base module further comprises an inlet filter, wherein the inlet filter is arranged at the inlet of the air pump and is fixed at the bottom of the base module.

[0031] In an implementation, the gas separator of the extendable module comprises a nitrogen outlet side and an oxygen outlet side, and the nitrogen and oxygen gas storage tank comprises a nitrogen gas storage tank and / or an oxygen gas storage tank.

[0032] The nitrogen outlet side is connected with the nitrogen gas storage tank through a pipeline, and the oxygen outlet side is connected with the oxygen gas storage tank through a pipeline.

[0033] In an implementation, the nitrogen gas storage tank is provided with a nitrogen outlet valve, and the oxygen gas storage tank is provided with an oxygen outlet valve.

[0034] The nitrogen outlet valve and the oxygen outlet valve are connected with the second gas regulating valve through a pipeline.

[0035] In an implementation, when the extendable module is separated from the base module, the inlet of the gas separator of the extendable module is externally connected with a clean compressed air source, and the nitrogen and / or oxygen gas produced is stored in the nitrogen gas storage tank and / or the oxygen gas storage tank.

[0036] In an implementable implementation, the air pump and the air tank of the basic module, and the nitrogen tank and the oxygen tank are all supported for multiple series or parallel expansions and are connected through standard interfaces; the nitrogen tank and / or the oxygen tank are all supported for multiple series or parallel expansions and are connected through standard interfaces;

[0037] When arranged in series, the air pump and the air tank are arranged outside the basic module and connected in series; the nitrogen tank and the oxygen tank are arranged outside the expandable module and connected in series;

[0038] When arranged in parallel, the air pump and the air tank are arranged inside the basic module and connected in parallel; the nitrogen tank, the oxygen tank, the air pump and the air tank are arranged inside the expandable module and connected in parallel.

[0039] The multi-gas generator provided in the application realizes on-demand output of dry air, nitrogen and oxygen through a single device, replacing multiple conventional devices. The basic module and the expandable module are detachably connected and can support independent or collaborative operation, reducing procurement and maintenance costs. The device efficiency is optimized and manual intervention is reduced through dynamic adjustment of the air flow path and flow. The air tank supports series expansion, and the nitrogen / oxygen tank supports parallel array, adapting to different flow requirements. The expandable module can be externally connected to an existing compressed air system, improving the device reuse rate. The gas separation process does not consume chemicals, and the filter material can be replaced, meeting the laboratory green requirements. Through structural innovation and control optimization, the application solves the problems of single function, low modularity and poor expandability of traditional gas generators, and provides an efficient, flexible and economical gas supply solution for laboratories. BRIEF DESCRIPTION OF DRAWINGS

[0040] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the present application and, together with the specification, serve to explain the principles of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained from these drawings by those skilled in the art without creative labor.

[0041] Figure 1 is a schematic diagram of the overall structure of the multi-gas generator according to an exemplary embodiment of the present application;

[0042] Figure 2 is a schematic diagram of the internal structure of the expandable module according to an exemplary embodiment of the present application;

[0043] Figure 3 is a front view of the multi-gas generator according to an exemplary embodiment of the present application;

[0044] Figure 4 is a sectional view of a multi-gas generator according to an example embodiment of the present application;

[0045] Figure 5 is a front exploded view of the internal structure of a base module according to an example embodiment of the present application;

[0046] Figure 6 is a back exploded view of the internal structure of a base module according to an example embodiment of the present application;

[0047] Figure 7 is a schematic view of the internal structure of an expandable module according to an example embodiment of the present application.

[0048] BRIEF DESCRIPTION OF DRAWINGS

[0049] 1 - base module; 2 - expandable module; 3 - gas path connection unit; 4 - control unit; 11 - air pump; 12 - multi-stage filter; 13 - gas storage tank; 14 - first gas regulating valve; 15 - water trap; 16 - inlet filter; 17 - heat dissipation fan; 21 - gas separator; 22 - nitrogen-oxygen gas storage tank; 24 - second gas regulating valve; 31 - electromagnetic valve switch; 41 - PLC controller; 42 - external display screen; 121 - primary filter; 122 - secondary filter; 221 - nitrogen gas storage tank; 222 - oxygen gas storage tank; 223 - nitrogen gas outlet valve; 224 - oxygen gas outlet valve; 311 - water discharge outlet; 312 - gas discharge outlet. DETAILED DESCRIPTION

[0050] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein;

[0051] Rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more implementations. In the following description, numerous specific details are provided to give a thorough understanding of implementations of the present application.

[0052] Current laboratory gas generators can usually only produce one of dry air, nitrogen or oxygen. Users need to purchase multiple devices to meet different gas needs, resulting in high cost, large space occupation, and the inability to reuse modules between devices. That is, a single device cannot simultaneously or on-demand produce dry air, high-purity nitrogen and high-purity oxygen; existing devices have low modularity, users cannot directly expand the functionality using existing compressed air systems; the devices lack flexibility and cannot dynamically adjust the number of gas production modules according to flow requirements.

[0053] To solve the above problems, with reference to Figures 1-7 The embodiment provides a multi-gas generator which is composed of a basic module 1 and an expandable module 2 through detachable connection.

[0054] One side of the bottom of the basic module 1 is fixed with an air pump 11, which provides power for the gas flow, and the inlet of the air pump 11 is connected with an external air source and provided with an inlet filter 16 for filtering large-particle impurities in the external air source. A water trap 15 is arranged between the multi-stage filter 12 and the air pump 11, the inlet of the water trap 15 is communicated with the outlet of the air pump 11, the outlet of the water trap 15 is communicated with the inlet of the multi-stage filter 12, and the outlet of the air pump 11 is connected with the multi-stage filter 12 composed of the water trap 15, a first-stage filter 121 and a second-stage filter 122 in sequence, the multi-stage filter 12 is used for removing small particles, harmful gases and moisture in the air and discharging excess moisture. The outlet of the multi-stage filter 12 is connected with the inlet of a gas storage tank 13 through a pipeline, and the gas storage tank 13 is used for storing dry air treated. A first gas regulating valve 14 is fixed between the inlet of the gas storage tank 13 and the outlet of the multi-stage filter 12, so as to control the start-stop and flow of the gas input.

[0055] The expandable module 2 is fixed with a gas separator 21 at the inlet position, and a nitrogen-oxygen gas storage tank 22 is connected to the outlet side of the gas separator 21, the gas separator 21 is provided with a gas separation membrane in the form of a thin film, which can separate nitrogen and oxygen from air by using the principle of permeation, and the nitrogen-oxygen gas storage tank 22 is used for storing high-purity gas separated. It can be understood that, in use, the gas separation membrane can be arranged in a shape matching the nitrogen-oxygen gas storage tank 22, such as still maintaining a thin film shape or being arranged in a tubular structure, and the present application does not make specific limitation.

[0056] A second gas regulating valve 24 is communicated with the outlet side of the nitrogen-oxygen gas storage tank 22, and the second gas regulating valve 24 controls the output of the nitrogen-oxygen gas to the outside and the output flow, so as to facilitate flexible use of the gas. When the basic module 1 is connected with the expandable module 2, the outlet pipeline of the multi-stage filter 12 is butted with the inlet pipeline of the gas separator 21.

[0057] In actual use, the external air source enters the air pump 11 through the inlet filter 16, is deeply purified and dehumidified by the multi-stage filter 12 and is stored in the gas storage tank 13, and the dry air treated can be output for use by opening the first gas regulating valve 14, that is, when the basic module 1 is operated alone, dry air is output. When the basic module 1 is connected with the expandable module 2, the air source enters the gas separator 21, and after separation by the gas separator 21, the nitrogen or oxygen enters the nitrogen-oxygen gas storage tank and is controlled by the second gas regulating valve 24 and is output respectively.

[0058] The embodiment utilizes the pressurization principle of the air pump 11, the hierarchical purification principle of the multi-stage filter, and the osmotic separation principle of the gas separator 21 to realize hierarchical treatment and on-demand distribution of the gas. Through modular design, the basic module 1 can independently output dry air, and after being connected with the expandable module 2, can further simultaneously output nitrogen and oxygen, or can output air and nitrogen or air and oxygen according to needs. The problem that a single device cannot on-demand output multiple gases is solved, and the basic module 1 and the expandable module 2 work together to improve the gas production efficiency. At the same time, the detachable connection mode allows users to select module combinations according to needs, avoids the purchase of multiple devices, reduces costs, and reduces space occupation.

[0059] In some embodiments of the present application, the multi-gas generator further comprises a gas path connection unit 3, which includes a drainage pipeline, an air pipeline, and an electromagnetic valve switch. The gas path connection unit 3 functions to realize the gas path communication between the components and the drainage control.

[0060] The multi-stage filter 12 is composed of a primary filter 121 and a secondary filter 122. The primary filter 121 is located at the outlet of the air pump 11, and the secondary filter 122 is arranged on the side of the primary filter 121 away from the air pump 11. The water trap 15, the primary filter 121, and the secondary filter 122 are all provided with an inlet, an outlet, and a drainage port. These interfaces are connected with each other through the drainage pipeline or the air pipeline to form a complete gas path system.

[0061] Specifically, the outlet of the water trap 15 is connected with the inlet of the primary filter 121 through the air pipeline, the outlet of the primary filter 121 is connected with the inlet of the secondary filter 122 through the air pipeline, and the outlet of the secondary filter 122 is connected with the inlet of the electromagnetic valve switch 31 through the air pipeline. The inlet of the electromagnetic valve switch 31 is also connected with the drainage ports of the water trap 15, the primary filter 121, and the secondary filter 122 through the drainage pipeline.

[0062] The outlet of the electromagnetic valve switch 31 includes a drainage outlet 311, an exhaust outlet 312, and an air outlet. The air outlet is connected with the inlet of the gas storage tank 13 and the inlet of the gas separator 21. Among them, the drainage outlet 311 is used for drainage, and the exhaust outlet 312 is used for exhaust; the electromagnetic valve switch 31 is used for controlling the opening or closing of the drainage outlet 311, the exhaust outlet 312, and the air outlet.

[0063] In this embodiment, the ambient air passes through the water trap 15, then is preliminarily filtered by the first filter 121, is further finely filtered by the second filter 122, and finally enters the gas storage tank 13 or the gas separator 21 for gas separation. The first filter 121 is usually made of high-density sponge or polyurethane shaped cotton material, and its core function is to intercept larger particles, impurities and excess moisture in the air, such as dust, hair, pollen, etc. to prevent them from entering the gas separator 21 and causing pollution or blockage, to reduce the burden of large-particle impurities on the subsequent filter layer through physical blocking, and to avoid blocking or scratching precision components.

[0064] The second filter 122 further finely filters and dries the gas. The second filter 122 uses higher-precision filter materials, such as high-density multi-layer folded filter paper, activated carbon filter cartridges or HEPA filter cartridges, to filter smaller particles in the air, such as PM2.5, bacteria, viruses, etc., as well as moisture, oil mist and other liquid impurities, effectively removing small contaminants to ensure that the gas entering the gas storage tank 13 meets high-purity standards.

[0065] The water trap 15 is responsible for removing moisture from the air to avoid the impact of moisture on subsequent equipment. The electromagnetic valve switch 31 precisely controls the drainage outlet to ensure that impurities and moisture generated during the filtering and water removal process can be promptly discharged, avoiding accumulation and affecting system performance.

[0066] The specific linkage process is as follows: after the air pump 11 is started, the air passes through the water trap 15 to remove moisture, and then enters the first filter 121 for preliminary filtering. The filtered air enters the first filter 121 again for secondary filtering, and then flows to the gas storage tank 13 for storage or enters the gas separator 21 for gas separation operation. During this process, the electromagnetic valve switch 31 opens the drainage outlet 311 in a timely manner according to system requirements to discharge impurities and moisture accumulated during filtering and water removal, thereby ensuring normal operation of the system.

[0067] In addition, the electromagnetic valve switch 31 allows the gas to normally enter the gas storage tank 13 and the gas separator 21 through the air outlet, and when gas generation is not required, the air outlet is closed and the exhaust outlet 312 is opened to discharge excess gas in the equipment.

[0068] In this embodiment, the problem of high impurity content in the gas is solved by the multi-stage filter 12. The primary filter 121 and the secondary filter 122 respectively undertake the tasks of coarse filtration and fine filtration, ensuring that the gas purity meets the requirements. Secondly, the presence of the water trap 15 solves the problem of excessive water content in the gas, avoiding the interference of water with the gas separator 21. In addition, the application of the electromagnetic valve switch 31 solves the problem of low efficiency and easy omission of traditional manual drainage, realizes the automatic control of the drainage process, and further improves the reliability and stability of the system.

[0069] In some embodiments of the present application, the multi-gas generator further comprises a control unit 4, which comprises a pressure sensor, a PLC controller 41 and an external display screen 42.

[0070] The pressure sensor is fixedly installed at the outlet position of the secondary filter 122, used for real-time detection of the output gas flow size to provide a basis for subsequent adjustment. The PLC controller 41 is electrically connected with the electromagnetic valve switch 31 to control the opening or closing of the electromagnetic valve switch 31. The PLC controller 41 is also electrically connected with the pressure sensor and the first gas regulating valve 14, and can adjust the first gas regulating valve 14 to control the input gas flow according to the detection data of the pressure sensor. The external display screen 42 is electrically connected with the PLC controller 41 and serves as a human-computer interaction interface, providing operation parameter display and user input functions, so that the user can intuitively understand the equipment running status and perform necessary operations.

[0071] When the system starts, the pressure sensor first starts to monitor the gas flow at the outlet of the secondary filter 122 and transmits the detected data to the control unit 4. If it is found that the actual flow deviates from the target value, an instruction is automatically sent to the first gas regulating valve 14 to increase or decrease the opening to correct the flow. At the same time, the PLC controller 41 automatically controls the opening and closing of the electromagnetic valve switch 31 according to the preset program to ensure the stability of the working mode of the equipment. In this process, all operation results are updated to the external display screen 42 in real time for the user to check.

[0072] In this embodiment, through the control unit 4, the pressure sensor and the PLC controller 41 can work together to accurately regulate and control the output flow in the case of unstable gas flow, avoiding process errors caused by flow fluctuations. At the same time, the external display screen 42 provides a more convenient human-computer interaction mode, significantly improving the operation convenience of the equipment.

[0073] In some embodiments of the present application, the base module 1 further comprises a cooling fan 17. The cooling fan 17 is fixed on the side of the air pump 11 away from the multi-stage filter 12, i.e. the other side of the bottom of the base module 1. The cooling fan 17 is used for forced cooling of the air pump 11 to prevent overheating of the equipment and improve the stability of the equipment.

[0074] When the multi-gas generator is in use, after the air pump 11 is operated, the heat dissipation fan 17 is started synchronously to reduce the temperature of the air pump 11 through air circulation. The present embodiment prolongs the service life of the air pump 11 through the heat dissipation fan 17, and improves the reliability of the equipment in a continuous working state.

[0075] In some embodiments of the present application, the base module 1 further comprises an inlet filter 16 fixed at the bottom of the base module 1 and directly connected to the inlet of the air pump 11, with the filtering surface facing the direction of the external air source.

[0076] The inlet filter 16 filters large-particle impurities (such as hair and fibers) in the air entering the air pump 11, preventing the impurities from entering the interior of the air pump 11 and causing abrasion. Specifically, the external air source enters the air pump 11 through the inlet filter 16, and the large-particle impurities are intercepted by the filter screen, and the clean air enters the air pump 11 for pressurization.

[0077] The present embodiment further solves the problem of pump body abrasion or air path blockage caused by impurities entering the inlet of the air pump 11, improves the durability of the equipment, protects the core components of the air pump 11, reduces the processing load of subsequent filters, and reduces the maintenance frequency of the equipment and improves the gas input quality.

[0078] In some embodiments of the present application, referring to Figure 2 As shown in the figure, the gas separator 21 is fixed at the inlet of the expandable module 2, the gas separator 21 comprises a nitrogen outlet side and an oxygen outlet side, and the nitrogen-oxygen gas storage tank 22 comprises a nitrogen gas storage tank 221 and / or an oxygen gas storage tank 222.

[0079] Specifically, the gas separator 21 separates nitrogen and oxygen by utilizing the permeation difference of the gas separation membrane, the gas molecules are first adsorbed on the surface of the gas separation membrane, then diffuse inside the gas separation membrane material, and finally desorb from the other side of the gas separation membrane. Based on the differences in molecular size, polarity, chemical properties, etc. of different gas molecules, the solubility and diffusion rate in the gas separation membrane are different, resulting in a significant difference in permeation rate. Therefore, the gas partial pressure difference on both sides of the gas separation membrane is the driving force for separation. The gas with fast permeation rate, such as oxygen, preferentially passes through the gas separation membrane under the action of the pressure difference and is enriched on the permeation side; while the gas with slow permeation rate, such as nitrogen, is intercepted on the raw material side, thereby realizing the separation of mixed gas.

[0080] Specifically, based on the above process, the dry air output by the base module 1 enters the gas separator 21, and the oxygen and nitrogen can be distinguished in the gas separator 21, and then connected to the respective storage tanks through different outlet sides for application.

[0081] In this embodiment, the difference in permeation rate of different gas molecules in the membrane material is utilized to separate nitrogen and oxygen by the gas separator 21, and the nitrogen-rich gas is stored in the nitrogen storage tank 221; the oxygen-rich gas is stored in the oxygen storage tank 222. The gas separation membrane in the gas separator 21 can separate nitrogen and oxygen, which can ensure the gas separation efficiency and solve the problem that multiple devices are required in the traditional equipment to produce multiple high-purity gases.

[0082] In some embodiments of the present application, the nitrogen storage tank 221 is provided with a nitrogen outlet valve 223, and the oxygen storage tank 222 is provided with an oxygen outlet valve 224; the nitrogen outlet valve 223 and the oxygen outlet valve 224 are connected with the second gas regulating valve 24 through pipelines.

[0083] The second gas regulating valve 24 controls the output of nitrogen and oxygen respectively; the nitrogen outlet valve and the oxygen outlet valve independently adjust the flow of the two gases.

[0084] The nitrogen outlet valve 223 and the oxygen outlet valve 224 are responsible for controlling the opening and closing of the respective gas passages and can independently adjust the flow rate; the second gas regulating valve 24 can further accurately control the output ratio of the mixed gas, thereby meeting the specific requirements.

[0085] When the gas is needed, the nitrogen outlet valve 223 or the oxygen outlet valve 224 is first opened to allow the corresponding gas to enter the pipeline system. Subsequently, the second gas regulating valve 24 adjusts the ratio of the two gases according to the actual application requirements, or outputs nitrogen or oxygen alone as needed. At this time, the precise control of the flow rate and the ratio can be realized by adjusting the two outlet valves and the second gas regulating valve 24, and finally the output of the target gas is completed.

[0086] The second gas regulating valve 24 of the present embodiment solves the technical problem of difficult simultaneous flexible adjustment of multiple gas flow in the traditional gas delivery system. At the same time, it avoids the error accumulation caused by the complex operation of a single valve, and significantly improves the consistency and stability of the gas output.

[0087] In some embodiments of the present application, when the expandable module 2 is separated from the base module 1, the inlet of the gas separator 21 of the expandable module 2 is connected with a clean compressed air source, and the nitrogen and / or oxygen produced is stored in the nitrogen storage tank 221 and / or the oxygen storage tank 222.

[0088] When the expandable module 2 operates independently, the clean compressed air source is connected as the input. The user separates the expandable module 2 from the base module 1, connects the external clean compressed air source through the standard interface, utilizes the compatibility principle of modular design, realizes the docking with the external gas source through the standard interface, and improves the applicability of the equipment.

[0089] The embodiment further expands the application scenarios of the device, supports integration with existing gas source systems, can reduce the procurement cost of user devices, and improves the reuse rate of modules.

[0090] In some embodiments of the present application, the air pump 11 and the gas storage tank 13 of the basic module 1, and the nitrogen gas storage tank 221 and the oxygen gas storage tank 222 all support multiple series or parallel expansions and are connected through standard interfaces. Among them, the series or parallel expansion of the air pump 11 can increase the air pressure, increase the external gas source, and increase the gas flow; the series or parallel expansion of the gas storage tank 13 can improve the dry air storage capacity; and the series or parallel expansion of the nitrogen gas storage tank and the oxygen gas storage tank can improve the pure gas supply capacity.

[0091] When the user demand flow increases, multiple gas storage tanks 13 are connected in series at the top of the basic module 1, and correspondingly, multiple air pumps 11 can also be configured; in the expandable module 2, the number of nitrogen gas storage tanks and oxygen gas storage tanks can be increased.

[0092] Specifically, when connected in series, the air pump 11 and the gas storage tank 13 are arranged outside the basic module 1 and connected in series; the nitrogen gas storage tank 221 and the oxygen gas storage tank 222 are arranged outside the expandable module 2 and connected in series; when connected in parallel, the air pump 11 and the gas storage tank 13 are stacked inside the basic module 1 and connected in parallel; the nitrogen gas storage tank 221, the oxygen gas storage tank 222, the air pump 11, and the gas storage tank 13 are stacked inside the expandable module 2 and connected in parallel.

[0093] At the same time, the embodiment meets the large flow demand through module expansion and improves the expandability of the device. It can support on-demand expansion of the device capacity and adapt to the needs of laboratories of different scales.

[0094] In combination with the above embodiment, the use process of the multi-gas generator provided in the present application includes:

[0095] 1. Independent operation of the basic module 1: when the user only needs dry air, connect an external gas source, start the air pump 11, store the processed air in the gas storage tank 13 through the inlet filter 16, the multi-stage filter 12, and the water trap 15, and output the air through the first gas regulating valve 14.

[0096] 2. Cooperative operation of the basic module 1 and the expandable module 2: connect the basic module 1 and the expandable module 2, open the corresponding drainage outlet 311 and the ventilation outlet according to the user-set gas type (nitrogen / oxygen) control electromagnetic valve switch 31, store the separated gas in the nitrogen gas storage tank and / or the oxygen gas storage tank through the gas separator 21, and output the gas through the second gas regulating valve 24.

[0097] 3. Independent operation of the expandable module 2: separate the expandable module 2, connect a clean compressed air source, separate and output nitrogen and oxygen, and adjust the output flow and ratio of the second gas regulating valve 24.

[0098] In summary, the multi-gas generator provided by the present application realizes on-demand output of dry air, nitrogen and oxygen by a single device, replacing multiple traditional devices. The basic module and the expandable module are detachably connected, and can support independent or cooperative operation, reducing procurement and maintenance costs. By dynamically adjusting the airflow path and flow, the efficiency of the device is optimized, and manual intervention is reduced. The gas storage tank supports serial expansion, and the nitrogen / oxygen gas storage tank supports parallel array, adapting to different flow requirements. The expandable module can be externally connected to the existing compressed air system, improving the reuse rate of the device. The gas separation process does not consume chemicals, and the filter material can be replaced, meeting the laboratory green requirements. Through structural innovation and control optimization, the present application solves the problems of single function, low modularity and poor expandability of traditional gas generators, and provides an efficient, flexible and economical gas supply solution for laboratories.

[0099] Other embodiments of the present disclosure will be apparent to those skilled in the art with the disclosure of the specification and examples. The present application is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field of the present disclosure not disclosed by the present disclosure.

Claims

1. A multi-gas generator, characterized in that, Comprise: Base module (1) and expandable module (2); The base module (1) comprises an air pump (11), a multi-stage filter (12), a gas tank (13), a first gas regulating valve (14) and a water trap (15); The air pump (11) is fixed on one side of the bottom of the base module (1), the multi-stage filter (12) is arranged on the outlet side of the air pump (11), the water trap (15) is arranged between the multi-stage filter (12) and the air pump (11), the inlet of the water trap (15) is communicated with the outlet of the air pump (11), the outlet of the water trap (15) is communicated with the inlet of the multi-stage filter (12), and the inlet of the air pump (11) is connected with an external air source; The gas tank (13) is fixed on the side of the multi-stage filter (12) away from the air pump (11), the inlet of the gas tank (13) is connected with the outlet of the multi-stage filter (12), and the first gas regulating valve (14) is fixed between the inlet of the gas tank (13) and the outlet of the multi-stage filter (12); The expandable module (2) comprises a gas separator (21), a nitrogen-oxygen gas tank (22) and a second gas regulating valve (24); The gas separator (21) is fixed on the inlet of the expandable module (2), the gas separator (21) is provided with a gas separation membrane in a film-shaped structure; The nitrogen-oxygen gas tank (22) is detachably arranged on the end of the expandable module (2) opposite to the gas separator (21), and the inlet of the nitrogen-oxygen gas tank (22) is communicated with the outlet of the gas separator (21); The second gas regulating valve (24) is communicated with the outlet of the nitrogen-oxygen gas tank (22); The base module (1) and the expandable module (2) are detachably connected; When the base module (1) and the expandable module (2) are connected, the outlet of the multi-stage filter (12) is connected with the inlet of the gas separator (21).

2. The multiple gas generator of claim 1 wherein, Further comprise: Gas path connecting unit (3), the gas path connecting unit (3) comprises a drainage pipeline, an air pipeline and an electromagnetic valve switch (31); The multi-stage filter (12) comprises a primary filter (121) and a secondary filter (122); The primary filter (121) is arranged on the outlet of the air pump (11), and the secondary filter (122) is arranged on the side of the primary filter (121) away from the air pump (11); The water trap (15), the primary filter (121) and the secondary filter (122) are all provided with an inlet, an outlet and a drainage port; The outlet of the water trap (15) is communicated with the inlet of the primary filter (121) through the air pipeline, the outlet of the primary filter (121) is communicated with the inlet of the secondary filter (122) through the air pipeline, and the outlet of the secondary filter (122) is communicated with the inlet of the electromagnetic valve switch (31) through the air pipeline. The inlet of the electromagnetic valve switch (31) is also connected with the water discharge port of the water separator (15), the primary filter (121) and the secondary filter (122) through the water discharge pipeline; The outlet of the electromagnetic valve switch (31) includes a water discharge outlet (311), an air discharge outlet (312) and a ventilation outlet, the ventilation outlet is connected with the inlet of the gas storage tank (13) and the inlet of the gas separator (21); The water discharge outlet (311) is used for water discharge, the air discharge outlet (312) is used for air discharge, and the electromagnetic valve switch (31) is used for controlling the opening or closing of the water discharge outlet (311), the air discharge outlet (312) and the ventilation outlet.

3. The multiple gas generator of claim 2 wherein, Further comprising: A control unit (4) comprising a PLC controller (41), a pressure sensor and an external display screen (42); The PLC controller (41) is electrically connected with the electromagnetic valve switch (31) and the external display screen (42), and is used for controlling the opening or closing of the electromagnetic valve switch (31); The pressure sensor is fixed at the outlet position of the secondary filter (122) to detect the input gas flow size; The PLC controller (41) is electrically connected with the pressure sensor and the first gas regulating valve (14).

4. The multiple gas generator of claim 1 wherein, The base module (1) further comprises a heat dissipation fan (17); The heat dissipation fan (17) is arranged on the side of the air pump (11) away from the multi-stage filter (12).

5. The multiple gas generator of claim 1 wherein, The base module (1) further comprises an inlet filter (16), wherein the inlet filter (16) is arranged at the inlet of the air pump (11) and fixed at the bottom of the base module (1).

6. The multiple gas generator of claim 2 wherein, The gas separator (21) of the expandable module (2) comprises a nitrogen outlet side and an oxygen outlet side, and the nitrogen and oxygen gas storage tank (22) comprises a nitrogen gas storage tank (221) and / or an oxygen gas storage tank (222); The nitrogen outlet side is connected with the nitrogen gas storage tank (221) through a pipeline, and the oxygen outlet side is connected with the oxygen gas storage tank (222) through a pipeline.

7. The multiple gas generator of claim 6 wherein, The nitrogen gas storage tank (221) is provided with a nitrogen outlet valve (223), and the oxygen gas storage tank (222) is provided with an oxygen outlet valve (224); The nitrogen outlet valve (223) and the oxygen outlet valve (224) are connected with the second gas regulating valve (24) through a pipeline.

8. The multiple gas generator of claim 6 wherein, When the expandable module (2) is separated from the base module (1), the inlet of the gas separator (21) of the expandable module (2) is connected with a clean compressed air source, and the nitrogen and / or oxygen gas produced is stored through the nitrogen gas storage tank (221) and / or the oxygen gas storage tank (222).

9. The multiple gas generator of claim 6 wherein, The air pump (11) and the gas storage tank (13) of the base module (1), and the nitrogen gas storage tank (221) and the oxygen gas storage tank (222) all support multiple series or parallel expansions and are connected through standard interfaces. When connected in series, the air pump (11) and the gas tank (13) are connected in series by being arranged outside the base module (1); the nitrogen gas tank (221) and the oxygen gas tank (222) are connected in series by being arranged outside the expandable module (2); When connected in parallel, the air pump (11) and the gas tank (13) are connected in parallel by being stacked inside the base module (1); the nitrogen gas tank (221), the oxygen gas tank (222), the air pump (11) and the gas tank (13) are connected in parallel by being stacked inside the expandable module (2).

Images