Gas supply apparatus

Abstract

A gas supply apparatus, comprising a plurality of container connection ports (101), a common gas channel (L1) for conveying gas, and branch gas channels (L2) respectively and correspondingly connected between the container connection ports (101) and the common gas channel (L1), wherein the gas is charged through the common gas channel (L1) into containers (200) connected to the container connection ports (101), or the gas stored in the containers (200) connected to the container connection ports (101) is supplied outwards through the common gas channel (L1). The gas supply apparatus makes it convenient for a user to flexibly match combinations of a container connection module with containers of different specifications or quantities on the basis of requirements.

Description

Gas supply equipment

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Chinese Patent Application No. 202410948393.2, filed on July 12, 2024, the contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to ventilation therapy equipment, and more specifically to a gas supply device. Background Technology

[0004] With the aging global population and the increasing prevalence of chronic diseases, people's demand for medical resources and their awareness of health are also continuously growing. As a key element in the treatment of many diseases, the demand for oxygen is also increasing. Moderate oxygen therapy can help with sleep, promote metabolism, and relieve pain. At the same time, oxygen therapy is also an important method for adjuvant treatment of various diseases. For example, patients with chronic cardiopulmonary diseases require long-term oxygen therapy to slow the deterioration of their condition and alleviate symptoms such as chest tightness, wheezing, and difficulty breathing.

[0005] Therefore, it is of great significance to enable people to conveniently, safely, quickly, and effectively obtain clean oxygen. Furthermore, the ability to access oxygen and oxygen therapy anytime, anywhere, whether at home, in a station, in a hotel, while traveling, or while hiking, can effectively improve the convenience of life.

[0006] Currently, products offering this convenience mainly include portable oxygen concentrators and disposable oxygen cylinders. However, both products have some shortcomings: the oxygen production performance of portable oxygen concentrators is affected by factors such as ambient temperature and air pressure, making it difficult to achieve the required medical oxygen concentration of 93±3% in high-altitude or low-temperature environments; while disposable oxygen cylinders, due to their small storage capacity and low pressure, provide oxygen for a short period, requiring the carrying of numerous cylinders during travel, resulting in inconvenience and a poor user experience. To address this, existing technologies have proposed solutions using extension tubes or quick-connect fittings to connect multiple cylinders to a common gas supply line. The resulting integrated unit then channels the gas into the main gas duct within the common gas supply line, supplying it to the user. However, this solution requires individual filling equipment to fill each cylinder, necessitating compatible connectors between the filling equipment and the cylinders, resulting in poor versatility and ease of use. Summary of the Invention

[0007] The purpose of this invention is to overcome the problem in the prior art that the common gas circuit connecting multiple containers has poor versatility and ease of use due to the need to separately fill each container with gas. The invention provides a gas supply device that can fill containers connected to the container connection port with gas and supply the gas stored in the containers to the user, effectively improving versatility and ease of use.

[0008] To achieve the above objectives, the present invention provides a gas supply device, including a plurality of container connection ports, a common gas channel for conveying gas, and branch gas channels respectively connected to each of the container connection ports and the common gas channel. The common gas channel is used to fill the container connected to the container connection port with gas or to supply the gas stored in the container connected to the container connection port to the outside through the common gas channel.

[0009] Preferably, it further includes an inflation channel with an inflation port and an inflation channel with an inflation port. The inflation channel is provided with an inflation control valve for preventing airflow to the inflation port and is capable of inflating the container connected to the container connection port through the inflation channel. The inflation channel is provided with an inflation control valve for controlling the inflation pressure and / or flow rate, so as to allow the container connected to the container connection port to supply air to the outside through the inflation channel.

[0010] Preferably, the gas supply channel is further provided with at least one of the following: a pressure relief valve, a pressure indicator unit for indicating the gas pressure in the gas supply channel, a safety valve for limiting the maximum inflation pressure, and a main gas supply switch for switching the on / off state of the gas supply channel.

[0011] Preferably, the pressure relief valve and / or pressure indicating unit and / or air supply interface are integrated into the air supply control valve.

[0012] Preferably, the gas supply control valve includes a mounting base and a valve body detachably mounted to the mounting base, and is configured such that: when there is pressure in the gas supply channel, the valve body cannot be removed from the mounting base; when there is no pressure in the gas supply channel, the valve body can be removed from the mounting base.

[0013] Preferably, the gas supply control valve includes:

[0014] The housing includes a piston chamber defined within it and an air inlet and an air outlet communicating with the piston chamber; and

[0015] A piston assembly, rotatably mounted within the piston chamber, having a large air vent and a small air vent communicating with the air inlet.

[0016] The piston assembly is configured to switch between a sealed state, a gas supply state, and a pressure relief state by rotating relative to the piston chamber. In the sealed state, both the large air hole and the small air hole are misaligned with the air outlet. In the gas supply state, the small air hole is connected to the air outlet. In the pressure relief state, the large air hole is connected to the air outlet.

[0017] Preferably, the gas supply device includes a container connection module, which includes a module body having the container connection port and an inflation connector and / or a gas supply connector connected to the module body.

[0018] Preferably, the inflation connector includes a quick-connect body for connecting to an inflation device, and the inflation control valve is an inflation check valve integrated within the quick-connect body.

[0019] Preferably, a common airway check valve is provided at the end of the common airway away from the branch airway, the inflation connector and the air supply connector can be selectively connected to this end of the common airway, and the common airway check valve is configured to interact with the inflation check valve and open simultaneously when the inflation connector is connected to reach a predetermined position.

[0020] Preferably, the gas supply device includes a container connection module, which includes a module body having the container connection port and a gas filling and supply joint connected to the module body.

[0021] Preferably, the module body includes a module base and a switching unit adjustablely mounted on the module base. The container connection port and the common inflation and gas supply connector are located on the module base. An inflation channel and a gas supply channel are formed within the switching unit. The switching unit can be selectively switched so that the branch air channel and the common inflation and gas supply connector are interconnected through the inflation channel or the gas supply channel.

[0022] Preferably, the gas supply device includes a container connection module, which includes a module body having multiple container connection ports, a module base connected to the module body, and a switching unit adjustablely mounted on the module base. The module base has a common inflator and gas supply connector. The switching unit has an inflator channel and a gas supply channel, and the switching unit can be selectively switched to allow the container connection ports and the common inflator and gas supply connector to communicate with each other through the inflator channel or the gas supply channel.

[0023] Preferably, the system further includes a container, the container opening of which is connected to the container connection port to supply breathing gas to the common airway through the branch airway, wherein the container outlet is provided with an airflow control unit configured to limit the outlet flow rate of the container at a predetermined pressure at least before connecting the corresponding container to the container connection port at a predetermined position.

[0024] Preferably, the airflow control unit includes a throttling orifice located at the outlet of the container to limit the airflow rate from the container to the common air passage when the container has a predetermined air pressure.

[0025] Preferably, the throttling orifice is configured such that when the air pressure inside the container is 2 atmospheres, the outflow rate of the container does not exceed 10 L / min.

[0026] Preferably, the container opening and the container connection port are integrated.

[0027] Preferably, the container opening is detachably connected to the container connection port, and the airflow control unit includes a container one-way valve located at the air outlet of the container. The container one-way valve is configured to remain closed during the process of connecting the container to the container connection port until the container is connected to a predetermined position and then open.

[0028] Preferably, the container connection port has an internal thread, and the container opening has an external thread for screwing into the internal thread. The container one-way valve is configured to remain closed during the process of screwing the container opening into the container connection port until a predetermined number of screw turns are reached.

[0029] Preferably, the container one-way valve includes a valve body, a valve stem extending into the valve body and movable between an open position and a closed position, and a return spring elastically abutting against the valve stem, the return spring causing the valve stem to tend to remain in the closed position; a push rod is provided at one end of the branch air passage facing the container connection port, and during the process of connecting the container to the container connection port, the push rod overcomes the elastic force of the return spring and pushes the valve stem toward the open position.

[0030] Preferably, a branch gas path one-way valve is provided at one end of the branch gas path facing the container connection port. The branch gas path one-way valve is configured to interact with the container one-way valve and open simultaneously when the container is connected to reach a predetermined position.

[0031] Preferably, multiple containers can be provided, and the volume of a single container is less than or equal to 1L.

[0032] Preferably, the container connection port is provided with a sealing gasket arranged around the inlet of the branch air passage, and when the container is connected to the container connection port, the container opening of the container is sealed against the sealing gasket.

[0033] Preferably, the branch airway is provided with a branch flow regulating valve, which can be adjusted to switch the on / off state of the branch airway and regulate the gas flow from the corresponding container to the common airway.

[0034] Preferably, the end of the common air passage away from the container is provided with an output interface, which is used to connect to an inflation control valve or a gas supply control valve; wherein, when the output interface is connected to an inflation control valve, external gas is supplied to the container through the common air passage; when the common inflation and gas supply connector is connected to a gas supply control valve, the gas inside the container is supplied to the outside through the common air passage.

[0035] Preferably, the output interface is provided with a first one-way valve, and the inflation control valve and the air supply control valve are provided with a second one-way valve. When the inflation control valve or the air supply control valve is connected to the output interface, the first one-way valve and the second one-way valve cooperate to make the common air passage connected to the inflation control valve or the air supply control valve.

[0036] Preferably, the common airway includes an on / off switch disposed at the front end of the output interface, the on / off switch being used to control the opening and closing of the common airway.

[0037] Preferably, the output interface is threadedly connected to the inflation control valve or the air supply control valve.

[0038] Preferably, the common airway further includes at least one of a pressure relief valve, a pressure indicator unit for indicating the air pressure level, and a safety valve for limiting the maximum inflation pressure.

[0039] Through the above technical solution, the gas supply device of the present invention can be connected to multiple containers through the container connection port, and is suitable for selectively filling the container connected to the container connection port with gas through its common channel, or supplying the gas stored in the container connected to the container connection port to the outside. Thus, there is no need to consider the compatibility of the connection joint between the filling device and the container, and it is convenient to flexibly match the combination of different specifications or quantities of containers as needed. It has the advantages of good versatility and convenient use. Attached Figure Description

[0040] Figure 1 is a schematic diagram of a gas supply device according to a preferred embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of a gas supply device according to another preferred embodiment of the present invention;

[0042] Figure 3 is a schematic diagram of the container connection module in a gas supply device according to a preferred embodiment of the present invention;

[0043] Figure 4 is a cross-sectional view of a gas supply device according to another preferred embodiment of the present invention;

[0044] Figure 5 is a cross-sectional view showing the inflation check valve and the common airway check valve of the inflation connector in Figure 3 or Figure 4 opening opposite each other.

[0045] Figure 6 is a cross-sectional view of the gas supply control valve that can be used in the container connection module in Figure 3 or the gas supply equipment in Figure 4.

[0046] Figure 7 is a cross-sectional view of the structure after removing the piston assembly and other components of the air supply control valve in Figure 6.

[0047] Figure 8 is a perspective view of the module base and switching unit of the container connection module;

[0048] Figure 9 is a cross-sectional view of the module base and switching unit in Figure 8, wherein the switching unit is switched to connect the common inflation and air supply connector to the inflation channel.

[0049] Figure 10 is a cross-sectional view of the module base and switching unit in Figure 8, wherein the switching unit is switched to connect the common inflator and inflator to the inflator channel.

[0050] Figure 11 is a cross-sectional view of a gas supply device according to a preferred embodiment of the present invention;

[0051] Figure 12 is an enlarged view of part A in Figure 11;

[0052] Figure 13 is a cross-sectional view of a gas supply device according to another preferred embodiment of the present invention;

[0053] Figure 14 is a cross-sectional view of a gas supply device according to another preferred embodiment of the present invention;

[0054] Figure 15 is a schematic diagram of a gas supply device according to another preferred embodiment of the present invention;

[0055] Figure 16 is a schematic diagram of a gas supply device according to another preferred embodiment of the present invention. Detailed Implementation

[0056] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0057] This invention provides a gas supply device that can provide various gases that need to be stored, such as oxygen, hydrogen, and nitrogen. This specification uses oxygen, a gas used for human respiration, as an example for illustration.

[0058] Referring to FIG1, a preferred embodiment of the gas supply device of the present invention includes a plurality of container connection ports 101, a common gas channel L1 for conveying gas, and branch gas channels L2 respectively connected to each container connection port 101 and the common gas channel L1. The container connection ports 101 are used to connect to containers 200 storing gas. Gas is supplied to the containers 200 connected to the container connection ports 101 through the common gas channel L1, or the gas stored in the containers 200 connected to the container connection ports 101 is supplied to the outside through the common gas channel L1.

[0059] For example, the gas supply device may also include an inflation channel L11 with an inflation port 102 and a gas supply channel L12 with a gas supply port 109. The inflation channel L11 is provided with an inflation check valve 103 that allows gas flow only to the container connection port 101, so that the container 200 connected to the container connection port 101 can be inflated through the inflation channel L11. The gas supply channel L12 is provided with a gas supply control valve 140 (shown in conjunction with FIG3) for controlling the gas supply pressure and / or flow rate, so that the container 200 connected to the container connection port 101 can supply gas to the outside through the gas supply channel L12.

[0060] Therefore, the gas supply device can be connected to multiple containers 200 (only one container is shown schematically in the figure) through the container connection port 101, and is suitable for filling the container 200 connected to the container connection port 101 with gas through its gas filling channel L11. Thus, there is no need to consider the compatibility of the connection joint between the gas filling device and the container, and the user can obtain the gas stored in the container 200 through the gas supply channel L12. It is convenient to flexibly match different specifications or quantities of containers as needed, and has the advantages of good versatility and ease of use.

[0061] It should be noted that the container 200 can be multiple independent gas cylinders or multiple independently configured cavities, as long as it can meet the gas storage function, no further restrictions are imposed here. Furthermore, since each gas cylinder or cavity is independently configured, if one container 200 runs out of gas or experiences a gas supply problem, the other independently configured containers 200 can replenish the gas supply. This can meet the needs of users in more usage scenarios and for large-capacity gas supply, while also ensuring high safety.

[0062] Preferably, the volume of a single gas cylinder or cavity is set to no more than 1L, and three to four can be set consecutively. This not only meets the needs of portability but also enables large-capacity gas storage. In the event of a failure of a single container 200, the use of other containers in the equipment will not be affected, ensuring high safety.

[0063] The gas supply device of the present invention may be provided with an inflation port 102 and a gas supply port 109 for connecting an inflation device for inflating the container 200 and a breathing tubing for supplying breathing gas to the user. The inflation port 102 and the gas supply port 109 described herein may be independent interfaces, or they may be integrated into a common interface that can selectively connect an inflation device and a breathing tubing, as will be described in detail later.

[0064] In the preferred embodiment shown in Figure 1, container 200 is detachably connected to container connection port 101. Therefore, although container 200 can be inflated using an inflation device connected to inflation port 102 as described above, this does not preclude the option of directly inflating container 200 using an inflation device after it has been detached from container connection port 101. For this purpose, an airflow control unit (such as the orifice 201 and container check valve 202, which will be described in detail later) for controlling airflow rate, pressure, and direction can be provided at the container opening of container 200. A branch airway check valve 114 can also be provided on the branch airway L2 to prevent gas from other containers from leaking through the branch airway L2. When container 202 is connected to container connection port 101, the branch airway check valve 114 can interact with container check valve 202 and open simultaneously to achieve inflation and gas supply operations.

[0065] Furthermore, as shown in Figure 1, the inflation channel L11 and the supply channel L12 are located at both ends of the common gas line L1. The supply channel L12 may also be equipped with control valves and indicator units such as a pressure relief valve 105, a pressure indicator unit 104 for indicating the gas pressure within the supply channel L12, a safety valve 106 for limiting the maximum inflation pressure, and a main gas supply switch 108 for switching the on / off state of the supply channel L12. For example, when a user carries this gas supply device on public transportation such as an airplane, they may be prohibited from carrying pressurized containers. Therefore, the pressure relief valve 105 can be used to quickly release the gas in the container. The pressure indicator unit 104 can monitor the container pressure by indicating the gas pressure within the supply channel L12, allowing the user to plan their trip based on the remaining gas volume or to perform inflation operations as needed. The safety valve 106 can be used to limit the maximum inflation pressure, i.e., to limit the safe threshold of the inflation pressure, preventing overpressure and over-inflation, and playing an important protective role for personal safety and the operation of the inflation equipment. In addition, an air supply flow regulating valve 107 can be installed on the air supply channel L12 to regulate the air supply flow.

[0066] The aforementioned control valves and indicating units can be integrated. For example, the gas flow regulating valve 107 and the main gas supply switch 108 can be configured as rotary switches that can switch between a closed state and a maximum gas flow state, thereby reducing the number of components. Additionally, at least some of the aforementioned control valves and indicating units can be integrated into the gas supply control valve 140. In FIG1, the gas supply equipment may include a container connection module 100 having a container connection port 101, a common gas passage L1, and a branch gas passage L2, and integrating control valves and indicating units, etc. A preferred embodiment of this module will be described in detail below.

[0067] Figure 2 illustrates a gas supply device according to another preferred embodiment of the present invention. Compared with the embodiment described above in conjunction with Figure 1, this gas supply device integrates the container opening and container connection port of the container 200 into one unit, thereby eliminating the need for container check valves and branch gas path check valves, saving production costs and reducing structural complexity. Other aspects of this preferred embodiment are the same as those described above in conjunction with Figure 1, and will not be repeated here.

[0068] As shown in Figures 15 and 16, in another preferred embodiment of the gas supply device of the present invention, compared with the embodiment described above in conjunction with Figure 1, the inflation channel L11 and the gas supply channel L12 are arranged on one side of the common gas channel L1. The common gas channel L1 includes at least one of a pressure relief valve 105, a pressure indicating unit 104 for indicating the gas pressure, and a safety valve 106 for limiting the maximum inflation pressure. The output end of the common gas channel L1 is connected to an inflation control valve or a gas supply control valve 140. When the inflation control valve is connected, external gas is supplied to the container 200 through the common gas channel L1; when the gas supply control valve 140 is connected, gas in the container 200 is supplied to the outside through the common gas channel L1.

[0069] Container connection module 100

[0070] Figures 3 and 4 show a container connection module 100 that can be used in the aforementioned gas supply equipment. The module includes multiple container connection ports 101, an inflation channel L11, and a gas supply channel L12. All three channels are located within the container connection module 100. The inflation channel L11 is equipped with an inflation check valve that allows gas flow only to the container connection port 101. The gas supply channel L12 is equipped with a gas supply control valve 140 for controlling the gas supply pressure and / or flow rate of the container connected to the container connection port 101. The inflation check valve can be replaced with other types of inflation control valves (such as on / off valves), as long as it can be manipulated to prevent gas flow to the inflation port 102.

[0071] Therefore, a container can be connected to the container connection port 101 of the container connection module 100, and the container can be inflated using an inflation device connected to the inflation channel L11. The container can be detachably connected to the container connection port 101 via threads or other means, or the container and the container connection port 101 can be integrally formed. Since the inflation channel L12 is equipped with an inflation check valve, which only allows airflow from the inflation port 102 to the container connection port 101, the gas output from the inflation device can be inflated into the container through the inflation channel L11. When no inflation operation is being performed, the inflation check valve prevents gas from leaking out of the container through the inflation channel L11. Because inflation is performed by connecting the container to the container connection module, there is no need to consider the compatibility of the connection joint between the inflation device and the container. As long as the inflation device can be adapted to the inflation joint of the inflation channel L11, containers of different sizes or quantities connected to the container connection module can be inflated.

[0072] Furthermore, when the container is connected to the container connection module, the user can obtain the gas stored in the container through its gas supply channel L12. This allows for flexible combination of the container connection module with containers of different specifications or quantities as needed, offering advantages such as good versatility and ease of use. By installing a gas supply control valve 140 on the gas supply channel L12, the high-pressure gas in the container can be reduced to a suitable pressure and supplied to the user in a safe, stable, and gentle flow rate through the gas supply interface 109.

[0073] Specifically, the container connection module 100 may include a module body 110 and an inflation connector 120 and an air supply connector 130 connected to the module body 110. The module body 110 has multiple container connection ports 101 to connect one or more containers as needed. For example, as detailed below with reference to FIG4, the module body 110 may be configured to include a housing and a mounting cavity within the housing. For example, a gas cylinder container 200 may be placed in the mounting cavity and connected to the corresponding container connection port 101. Each container connection port 101 may be connected to an inflation channel L11 and an air supply channel L12, respectively. Alternatively, the container connection ports 101 may be connected in series, such that the first container connection port 101 is connected to the inflation channel L11 and the last container connection port 11 is connected to the air supply channel L12.

[0074] As shown in the preferred embodiment of Figure 4, the module body 110 includes a housing and an internal mounting cavity. A container connection port 101 is located on one side of the mounting cavity. The container 200 is connected to the container connection port 101 and placed inside the mounting cavity. The container connection port 101 is connected to an inflation connector 120 via an inflation channel L11 (not shown). An inflation device can be connected to the inflation connector 120 to supply pressurized gas into the inflation channel L11, thereby inflating the container 200 connected to the container connection port 101. The container connection port 101 is connected to an air supply connector 130 via an air supply channel L12. The air supply connector 130 can be used to connect to a user interface to supply the gas stored in the container 200 to the user. An air supply control valve 140 can be used to control the air supply pressure and / or flow rate. As will be described below in conjunction with Figures 6 and 7, the air supply connector 130 can be integrated into the air supply control valve 140, and the air supply control valve 140 can also integrate a pressure indicator unit 104 and a pressure relief function, etc. The container opening of container 200 can be connected to container connection port 101 in a detachable or integral manner, as will be explained in detail later with reference to Figures 11 to 14. That is, although Figures 11 to 14 show that each container 200 is connected to container connection module 100 only at the container opening, container connection module 100 can also be configured to have a mounting cavity so that the container 200 can be encapsulated within container connection module 100 in the assembled state.

[0075] Furthermore, the inflation connector 120 may include a quick-connect connector body for connecting to an inflation device, and an inflation check valve 103 may be integrated within the quick-connect connector body to form a quick-connect one-way inflation connector. More specifically, the quick-connect connector body may be connected to the module body 110 by means such as screws, and may contain a valve core guide rod and a return spring that elastically abuts against the valve core guide rod. Under the action of the return spring, the valve core guide rod tends to remain in a position that closes the channel in the quick-connect connector body, so as to prevent gas in the container from leaking out through the inflation channel L11 when no inflation operation is performed. When inflation is performed, the valve core guide rod can be pushed by the connector on the inflation device and displaced against the elastic force of the return spring, thereby opening the channel in the quick-connect connector body, and high-pressure gas can be smoothly injected into the container connected to the container connection port 101 through the inflation channel L11. After inflation is completed, when the inflation device is removed, the valve core guide rod is reset under the action of the return spring and automatically closes the inflation channel.

[0076] Furthermore, in the preferred embodiment shown in Figures 3 and 4, the gas supply connector 130 is integrated into the gas supply control valve 140. In addition, the gas supply control valve 140 also integrates a pressure relief valve 105 and a pressure indicator unit 104 for indicating the gas pressure within the gas supply channel L12, a preferred embodiment of which will be described in detail below with reference to Figures 6 and 7. Thus, when it is necessary to release stored gas, the pressure relief valve 105 can be operated to quickly release the gas from the container. Alternatively, the user can plan the trip based on the remaining gas volume indicated by the pressure indicator unit 104, and arrange the relevant schedule accordingly. In some embodiments, the pressure relief valve 105 and the pressure indicator unit 104 (such as a pressure gauge) can be installed on the portion of the gas supply channel L12 located on the module body 110.

[0077] In the container connection module of the preferred embodiment described above, the module body 110 is connected to an inflation connector 120 for connecting an inflation device and an air supply connector 130 for connecting to a user interface, so as to be able to inflate the container connected to the container connection port 101 or obtain the gas stored therein from the container.

[0078] In the preferred embodiment described above, the inflation connector 120 and the gas supply connector 130 (gas supply control valve 140) can be selectively connected to the module body 110, thereby switching between an inflation operating mode and a gas supply operating mode. When the inflation connector 120 is connected to one end of the common air passage L1, an inflation device can be connected to the inflation connector 120 to inflate the container 200 connected to the container connection port 101 through the common air passage L1; when the inflation connector 120 is removed and replaced by connecting the gas supply connector 130 (gas supply control valve 140) to one end of the common air passage L1, the gas stored in the container 200 connected to the container connection port 101 can be supplied externally through the common air passage L1. Referring to Figure 5, a common airway check valve 115 can be provided at the end of the common airway L1 furthest from the branch airway L2. This common airway check valve 115 is configured to prevent gas from flowing out of the common airway L1 when the common airway L1 is not connected to the inflation connector 120 and the gas supply connector 130. When either the inflation connector 120 or the gas supply connector 130 is connected to the common airway L1, the common airway check valve 115 opens to allow inflation and gas supply. Figure 5 shows the interaction between the inflation connector 120 and the common airway check valve 115. As mentioned above, the inflation connector 120 integrates an inflation check valve 103. When the inflation connector 120 is connected to the module body 110 and the connection is in a predetermined position, the inflation check valve 103 and the common airway check valve 115 interact and open simultaneously. Similarly, the gas supply connector 130 (gas supply control valve 140) can also act in a similar manner on the common airway check valve 115 to keep the common airway L1 connected when supplying gas to the outside.

[0079] In other preferred embodiments described below, the container connection module can be configured to connect the inflation device and the gas supply line using a single connector, thereby significantly improving its compactness. For example, the container connection module can be configured to have a shared inflation and gas supply connector 152 (as shown in Figures 8 to 10) and can switch between an inflation mode and a gas supply mode using a switching unit 160: in the inflation mode, the inflation device is connected to the shared inflation and gas supply connector 152 to inflate the container connected to the container connection port 101; in the gas supply mode, the gas supply line can be connected to the shared inflation and gas supply connector 152 to obtain the gas stored therein from the container connected to the container connection port 101.

[0080] Referring to Figures 8 to 10, in another preferred embodiment of the present invention, the container connection module includes a module base 150 and a switching unit 160 adjustablely mounted on the module base 150 (the module base 150 and the switching unit 160 as a whole can be regarded as the module body). The module base 150 is provided with a container connection port 101 and an inflation and air supply joint 152. An inflation channel L11 and an air supply channel L12 are formed in the switching unit 160, and the switching unit 160 can be selectively switched so that the container connection port 101 and the inflation and air supply joint 152 are interconnected through the inflation channel L11 or the air supply channel L12.

[0081] Thus, the container can be connected to the module base 150 via the container connection port 101, and the position of the switching unit 160 relative to the module base 150 can be adjusted so that the container connection port 101 (i.e., the container) and the common inflation / supply connector 152 are interconnected through the inflation channel L11 or the supply channel L12 and the common air passage. In this preferred embodiment, the inflation check valve 103 and the supply control valve 140 are both disposed on the switching unit 160 and are disposed corresponding to the inflation channel L11 and the supply channel L12. When it is necessary to inflate the container, as shown in Figure 9, the switching unit 160 is adjusted so that the container connection port 101 and the common inflator / supply connector 152 are connected through the inflation channel L11 and the common airway. Thus, the container can be inflated through the inflation channel L11 and the common airway by connecting the inflation device to the common inflator / supply connector 152. When it is necessary to supply air to the user, as shown in Figure 10, the switching unit 160 is adjusted so that the container connection port 101 and the common inflator / supply connector 152 are connected through the supply channel L12 and the common airway. Thus, the gas in the container connected to the container connection port 101 can be supplied to the common inflator / supply connector 152 through the supply channel L12 and the common airway, thereby providing breathing gas to the user.

[0082] The switching unit 160 can be configured to adjust between different connection states in a variety of ways. For example, the switching unit 160 can be rotatably mounted to the module base 150 so that when rotated to different orientations relative to the module base 150, the container connection port 101 and the common inflation / supply connector 152 are interconnected through the inflation channel L11 or the supply channel L12.

[0083] In the figure, the module base 150 shows only one of the multiple container connection ports 101. Each container connection port 101 can be connected to a common airway L1 via a branch airway L2, allowing the user to inflate or obtain breathing gas from the container connected to that container connection port 101. The container connection module can be inflated and supplied with gas in the same manner as in the preferred embodiment described above. Therefore, the module base 150 can be appropriately equipped with airways and control valves corresponding to different container connection ports.

[0084] Referring to Figures 9 and 10, in another preferred embodiment of the present invention, the container connection port 101 in the preferred embodiment described above in conjunction with Figures 8 to 10 can be configured to be suitable for connecting to the module body connection port 151 of the module body 110 of the preferred embodiment described above in conjunction with Figures 3 and 4, thereby forming a container connection module formed by connecting the components shown in Figures 9 and 10 to the module body 110 provided with a plurality of container connection ports 101.

[0085] Specifically, the container connection module includes a module body 110 with multiple container connection ports 101, a module base 150 connected to the module body 110, and a switching unit 160 adjustablely mounted on the module base 150. The module base 150 is provided with an inflation and air supply joint 152. An inflation channel L11 and an air supply channel L12 are formed in the switching unit 160. The switching unit 160 can be selectively switched so that the container connection ports 101 and the inflation and air supply joint 152 are interconnected through the inflation channel L11 or the air supply channel L12.

[0086] Referring to Figure 15, in another preferred embodiment of the present invention, an output interface LP is provided at the end of the common air passage L1 away from the container 200. Referring to Figure 4, the output interface LP can be disposed on the module body 110 of the container connection module and is used to connect to the inflation control valve or the air supply control valve 140. The output interface LP is provided with a first one-way valve (i.e., the aforementioned common air passage one-way valve 115), and the inflation control valve and the air supply control valve 140 are provided with a second one-way valve. When the inflation control valve or the air supply control valve 140 is connected to the output interface LP, the first one-way valve and the second one-way valve cooperate to connect the common air passage L1 with the inflation control valve or the air supply control valve 140. For details, please refer to the description in Figure 5 above. The output interface LP and the inflation control valve or the air supply control valve can be connected by a 140-degree thread. The opening of the first one-way valve can be controlled by the thread depth to reach a predetermined position. For details, please refer to the description of similar structures in the safety connection structure section.

[0087] Referring to Figure 16, in another preferred embodiment of the present invention, compared to the embodiment in Figure 15, the structures of the first and second one-way valves are omitted. Specifically, the common air passage L1 includes an on / off switch LS disposed at the front end of the output interface LP, which is used to control the opening and closing of the common air passage L1. When selecting gas supply or filling, the filling control valve and the gas supply control valve 140 need to be replaced. To ensure that the gas cylinder connection module does not leak during replacement, the on / off switch LS can be turned off in advance.

[0088] The various embodiments described above can be combined with each other. For example, the inflation connector 120 and the air supply control valve 140 shown in Figures 5 to 7 can also be selectively connected to the inflation and air supply common connector 152.

[0089] In other embodiments, the components shown in Figures 9 and 10 can also be shared among multiple containers in other ways. For example, if multiple containers can be connected to each other via interlocking, then the component only needs to be connected to one of the different containers to allow multiple containers to share the same inflation and supply connector for inflation and supply.

[0090] Gas supply control valve 140

[0091] Figures 6 and 7 show cross-sectional views of a gas supply control valve integrating gas supply, pressure relief, and pressure indication functions. The gas supply control valve 140 includes a mounting base 143 and a valve body detachably mounted to the mounting base 143. It is configured such that when there is pressure in the gas supply passage L12, the valve body cannot be removed from the mounting base 143; when there is no pressure in the gas supply passage L12, the valve body can be removed from the mounting base 143. To this end, the gas supply control valve 140 may be provided with a locking structure for switching between a locked state and an unlocked state: in the locked state, the locking structure locks the valve body to the mounting base 143 to prevent the valve body from being removed from the mounting base 143; in the unlocked state, the locking structure releases the valve body to allow the valve body to be removed from the mounting base 143. Thus, when the gas supply equipment is pressurized, the valve body cannot be disassembled to ensure its reliable use; after pressure relief, when there is no internal pressure, the valve body can be disassembled, effectively proving that pressure relief has been completed, facilitating subsequent transportation.

[0092] The mounting base 143 of the gas supply control valve 140 can be fixed to the main body of the module, and the valve body is detachably connected to the mounting base 143 via a threaded structure. In the preferred embodiment shown, the gas supply control valve 140 also integrates a pressure indicating unit 104, which can indicate the gas pressure in the gas supply channel L12. In the preferred embodiment shown, the pressure indicating unit 104 also has the aforementioned locking function. Specifically, the mounting base 143 can have a tubular body with a mounting groove formed inside it. The top of the mounting groove is open, and the bottom has a through hole communicating with the cavity of the tubular body. The pressure indicating unit 104 is generally cylindrical and is sealed and installed in the mounting groove through the top opening of the mounting groove. The valve body (i.e., the housing 331 described later) is provided with an indicator through hole corresponding to the top opening of the mounting groove. The pressure indicating unit 104 is configured to extend out of the indicator through hole under the action of gas pressure in the cavity of the tubular body and retract into the mounting groove when the gas pressure is lost. With this configuration, the pressure indicator unit 104 can not only indicate the gas pressure in the gas supply channel L12, but also ensure that the valve body cannot be removed when there is pressure in the gas supply channel L12, and can be removed when there is no pressure in the gas supply channel L12, thereby improving the safety and convenience of using the gas supply equipment.

[0093] Referring again to Figures 6 and 7, the air supply control valve may include a housing 141 and a piston assembly 142 rotatably disposed therein. The housing 141 may be connected to the module body 110 (e.g., via the aforementioned mounting base 143) and includes a piston chamber 141a defined therein, and an air inlet 141b and an air outlet 141c (equivalent to the aforementioned air supply interface) communicating with the piston chamber 141a. The piston assembly 142 is rotatably mounted within the piston chamber 141a and has a large air hole 142a and a small air hole 142b communicating with the air inlet 141b. The piston assembly 142 can be manipulated to rotate within the piston chamber 141a, thereby switching the air supply connector between a sealed state, an air supply state, and a depressurized state. In the illustrated position, the air supply connector is in the depressurized state, and the large air hole 142a of the piston assembly 142 communicates with the air outlet 141c of the housing 141, thereby allowing for rapid pressure release. When the piston assembly 142 is rotated such that its small vent 142b is fully or partially connected to the vent 141c of the housing 141, the air supply connector is in the air supply state, providing the user with an airflow of appropriate flow rate and pressure through the vent 141c. When the piston assembly 142 is rotated such that both its large vent 142a and small vent 142b are misaligned with the vent 141c, the air supply passage is cut off. Thus, the air supply connector can achieve multiple functions such as air supply passage on / off control, air supply flow rate regulation, and rapid pressure relief.

[0094] Container 200 and its secure connection structure with container connection module 100

[0095] The gas supply device of the present invention may include a container connection module 100 and a plurality of containers 200 connected thereto. The containers 200 may be, for example, oxygen containers storing oxygen or other breathing gases. The container connection module 100 has a plurality of container connection ports through which the containers 200 can be connected to the container connection module 100. The container connection module 100 also has a common airway L1 and branch airways L2 respectively connected to each container connection port and the common airway L1. Breathing gases stored in each container 200 can be supplied to the common airway L1 through the corresponding branch airways L2, allowing the user to obtain breathing gases through the common airway L1. For this purpose, the container connection module 100 may be provided with a gas supply connector for connecting the common airway L1 to a user interface (e.g., through a breathing tube). Thus, the gases stored in the plurality of containers 200 connected to the container connection ports can be respectively channeled into the common airway L1 through the corresponding branch airways L2 for user use. Therefore, the gas supply device can have a relatively large gas capacity, easily meeting the needs of multiple people inhaling oxygen, providing oxygen for extended periods, or allowing multiple people to inhale oxygen simultaneously.

[0096] In this gas supply device, an airflow control unit is provided at the outlet of container 200. This airflow control unit is configured to limit the outlet flow rate of container 200 at a predetermined pressure at least before connecting the corresponding container 200 to a predetermined position of the container connection port. Therefore, during the process of connecting the container to the container connection module 100, the airflow control unit can limit the outlet flow rate and pressure of the container, thereby effectively preventing the container from being ejected, thus providing high safety in use. The airflow control unit mentioned here can be a container check valve 202 as shown in Figures 11 to 12 or 14, and / or a throttling orifice 201 as shown in Figure 13 or 14, which will be described in detail later.

[0097] Furthermore, a control unit capable of preventing airflow from the common airway L1 to the corresponding container 200 may be provided on the branch airway L2 and / or at the outlet of the container 200. For example, this control unit could be a branch flow regulating valve 113, as detailed later, located on the branch airway L2. Thus, when the remaining gas volume in one of the containers 200 is insufficient, or when the pressure in one container 200 is significantly higher than the pressure in other containers 200, the control unit can prevent the gas in the common airway L1 from flowing back to the low-pressure container by cutting off the connection between the low-pressure container and the common airway L1, thereby not affecting the gas supply from other containers to the main airway and the user.

[0098] In the preferred embodiment shown in Figures 11 and 12, a branch air passage check valve 114 is provided in the branch air passage L2. The branch air passage check valve 114 is configured to interact with and open simultaneously with the container check valve 202 only when the container 200 is connected to reach a predetermined position.

[0099] Referring again to Figures 11 and 12, the gas supply device of this preferred embodiment further includes a branch flow regulating valve 113, which serves as the aforementioned on / off control unit. This branch flow regulating valve 113 is located on a branch gas channel L2 and can be adjusted to switch the on / off state of the branch gas channel L2, thereby regulating the gas flow rate from the corresponding container 200 to the common gas channel L1. Thus, when the remaining gas volume in a container 200 is insufficient (for example, a pressure indicator element can be provided on the container to determine its remaining gas volume or pressure), the branch flow regulating valve 113 on the corresponding branch gas channel L2 can be operated to switch it to the position of cutting off the branch gas channel L2, preventing gas in the common gas channel L1 from flowing back to the low-pressure container 200. Simultaneously, the branch flow regulating valve 113 can be used to regulate the gas flow rate from the corresponding container 200 to the common gas channel L1, which can be used to control the output flow rate of the common gas channel L1, facilitating user adjustment according to remaining gas volume and gas demand.

[0100] The branch flow regulating valve 113 can be configured in various suitable structural forms. In the preferred embodiment shown in the figure, the branch flow regulating valve 113 has a valve stem rotatably connected to the module body. This valve stem has a throttling orifice. When the valve stem is rotated to different positions, the throttling orifice can be connected to or cut off from the branch air passage L2, or have throttling openings of different sizes, so as to switch the on / off state of the branch air passage L2, or regulate the gas flow from the corresponding container 200 to the common air passage L1. As shown in Figures 11 and 12, when the gas volume in the container 200 on the right side of the figure is insufficient, or when a container 200 is disassembled, or in other situations where it is necessary to cut off the connection between the common air passage L1 and the container 200, the valve stem of the branch flow regulating valve 113 on the branch air passage L2 corresponding to the container 200 can be rotated to cut off its throttling orifice from the branch air passage L2, thereby avoiding the impact on the gas supply in the common air passage L1. By adjusting the size of the throttling opening, it is convenient to freely switch between different gas supply modes and control the gas supply flow.

[0101] As mentioned above, during the process of connecting container 200 to a common airway, such as container connection module 100, high-pressure gas is instantly ejected from the bottle outlet, which can easily cause the bottle to pop open, posing a high safety risk. Therefore, in the preferred embodiment shown in Figures 11 and 12, the container opening of container 200 is detachably connected to the container connection port, and a container one-way valve 202 is provided at the outlet of container 200. This container one-way valve 202 is configured to remain closed during the process of connecting container 200 to the container connection port until container 200 is connected to a predetermined position and then opens. Thus, when container 200 and the container connection port of container connection module 100 are not sufficiently connected, the container one-way valve 202 remains closed, i.e., the container one-way valve 202 acts as the aforementioned airflow control valve, limiting the outlet flow of container 200 to 0; when container 200 is connected to the predetermined position, the container one-way valve 202 opens to supply breathing gas to the branch airway L2 of container connection module 100. This design prevents the bottle from popping open due to the instantaneous ejection of high-pressure gas from the outlet during the connection of container 200 to container connection module 100, effectively improving the safety of the gas supply equipment. Furthermore, by installing a one-way valve 202 at the outlet of container 2, the container 2 can be sealed, and the one-way valve 202 can be opened to quickly depressurize container 200 when needed.

[0102] Typically, container 200 can be connected to the container connection port of container connection module 100 via a threaded connection. For this purpose, the container connection port can have an internal thread, and the container opening of container 200 has an external thread for screwing into this internal thread. The container one-way valve 202 is configured to remain closed during the process of screwing the container opening of container 200 to the container connection port until a predetermined number of screw turns are reached. Therefore, by setting the opening timing of container one-way valve 202 based on the number of screw turns between container 200 and container connection port, it can be effectively ensured that the connection established between container 200 and container connection port when container one-way valve 202 is open is sufficient to prevent the bottle from being ejected. In other embodiments, container 200 can also be configured to be connected to container connection module 100 via snap-fit ​​or other methods.

[0103] The container check valve 202 can also be configured in various suitable structural forms. In the illustrated preferred embodiment, the container check valve 202 includes a valve body 2021 with an outlet, a valve stem 2022 extending into the valve body 2021 and movable between an open position and a closed position, and a return spring 2023 elastically abutting against the valve stem 2022. The return spring 2023 causes the valve stem 2022 to tend to remain in the closed position, thereby maintaining the container 200's self-sealing when not connected or not connected to a predetermined position. In contrast, a push rod 111 is provided at the end of the branch air passage L2 facing the container connection port. During the process of connecting the container 200 to the container connection port, the push rod 111 overcomes the elastic force of the return spring 2023 and pushes the valve stem 2022 toward the open position, thereby opening the container check valve 202. Therefore, through the above-mentioned threaded connection relationship and the relative arrangement between the push rod 111 and the valve stem 2022, the order of threaded connection and opening of the container check valve 202 can be effectively controlled, thereby preventing the container from being ejected when the vent is opened during the container connection process, effectively protecting the operator and user from injury, and making the connection safer, more reliable and more user-friendly.

[0104] Furthermore, to ensure sealing, in the above-mentioned container check valve 202, a tapered opening that gradually narrows away from the return spring 2023 can be formed in the inner cavity of the valve body 2021. A sealing ring can be provided on the valve stem 2022 for sealing and engaging with the tapered opening, so that when the valve stem 2022 is not pushed, the sealing ring can be used to seal and fit against the inner wall of the valve body 2021, thereby preventing gas leakage from the container.

[0105] In addition, a sealing gasket 112 may be provided inside the container connection port, which is arranged around the inlet of the branch airway L2. When the container 200 is connected to the container connection port, the valve body 221 seals against the sealing gasket 112 to establish a sealed connection between the container 200 and the branch airway L2, so as to prevent breathing gas from escaping at the connection point.

[0106] Figure 13 shows another preferred embodiment of the gas supply device. Compared with the preferred embodiment described above in conjunction with Figures 11 and 12, this gas supply device eliminates the branch flow regulating valve on the branch air passage L2 and the container check valve at the outlet of the container 200, and fixes each container 200 to the container connection module 100. This arrangement saves production costs and reduces structural complexity compared to the preferred embodiment described above, and also eliminates the air passage check valve, thereby facilitating the filling of containers with lower pressure using a filling device connected to the container connection module 100. In this gas supply device, a throttling orifice 201 is provided at the outlet of the container 200 to limit the gas flow rate from the container 200 to the common air passage L1 when the container 200 has a predetermined pressure. For example, when the pressure inside the container 200 is 2 atmospheres, the outlet flow rate of the container 200 does not exceed 10 L / min. Preferably, when the gas pressure inside container 200 is 2 atmospheres, the gas flow rate of container 200 is 5 L / min. Apart from this, the sealing gasket 112 and other components in the gas supply device of this preferred embodiment are basically the same as those in the preferred embodiment described above in conjunction with Figures 11 and 12, and will not be repeated here.

[0107] Figure 14 shows another preferred embodiment of the gas supply device. This gas supply device is largely the same as the preferred embodiment described above in conjunction with Figures 11 and 12, having the same container check valve 202, push rod 111, threaded connection structure (internal thread 15 at the container connection port and external thread 23 at the container opening), branch gas duct check valve, sealing gasket 112, etc., which will not be described again here. This gas supply device omits the branch flow control valve provided on the branch gas duct L2 and provides a throttling orifice 201 at the outlet of the container 200 to limit the gas flow rate from the container 200 to the common gas duct L1 when the corresponding container 200 has a predetermined gas pressure. For example, when the gas pressure inside the container 200 is 2 atmospheres, the outlet gas flow rate of the container 200 does not exceed 10 L / min. Preferably, when the gas pressure inside the container 200 is 2 atmospheres, the outlet gas flow rate of the container 200 is 5 L / min.

[0108] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A gas supply device, characterized in that, It includes multiple container connection ports (101), a common gas channel (L1) for conveying gas, and branch gas channels (L2) respectively connected between each of the container connection ports (101) and the common gas channel (L1). The container connection ports (101) are used to connect to containers (200) for storing gas. Gas is supplied to the containers (200) connected to the container connection ports (101) through the common gas channel (L1) or the gas stored in the containers (200) connected to the container connection ports (101) is supplied to the outside through the common gas channel (L1).

2. The gas supply device according to claim 1, characterized in that, It also includes an inflation channel (L11) with an inflation port (102) and an inflation channel (L12) with an inflation port (109). The inflation channel (L11) is provided with an inflation control valve for preventing airflow to the inflation port (102) and is able to inflate the container (200) connected to the container connection port (101) through the inflation channel (L11). The inflation channel (L12) is provided with an inflation control valve (140) for controlling the inflation pressure and / or flow rate, so as to allow the container (200) connected to the container connection port (101) to supply air to the outside through the inflation channel (L12).

3. The gas supply device according to claim 2, characterized in that, The gas supply channel (L12) is also provided with at least one of the following: a pressure relief valve (105), a pressure indicator unit (104) for indicating the gas pressure in the gas supply channel (L12), a safety valve (106) for limiting the maximum inflation pressure, and a main gas supply switch (108) for switching the on / off state of the gas supply channel (L12).

4. The gas supply device according to claim 3, characterized in that, The pressure relief valve (105) and / or pressure indicating unit (104), and / or air supply interface (109) are integrated on the air supply control valve (140).

5. The gas supply device according to claim 2, characterized in that, The gas supply control valve (140) includes a mounting base (143) and a valve body detachably mounted to the mounting base (143), and is configured such that: when there is pressure in the gas supply passage (L12), the valve body cannot be removed from the mounting base (143); when there is no pressure in the gas supply passage (L12), the valve body can be removed from the mounting base (143).

6. The gas supply device according to claim 2, characterized in that, The gas supply control valve (140) includes: A housing (141), the housing (141) including a piston chamber (141a) defined therein and an air inlet (141b) and an air outlet (141c) communicating with the piston chamber (141a); and A piston assembly (142) is rotatably mounted within the piston chamber (331a) and has a large air vent (142a) and a small air vent (142b) communicating with the air inlet (331b). The piston assembly (142) is configured to switch between a sealed state, a gas supply state, and a pressure relief state by rotating relative to the piston chamber (141a), wherein: in the sealed state, both the large air hole (142a) and the small air hole (142b) are misaligned with the air outlet (141c); in the gas supply state, the small air hole (142b) is correspondingly connected to the air outlet (141c); and in the pressure relief state, the large air hole (142a) is correspondingly connected to the air outlet (141c).

7. The gas supply device according to claim 2, characterized in that, The gas supply device includes a container connection module (100), which includes a module body (110) having the container connection port (101) and an inflation connector (120) and / or a gas supply connector (130) connected to the module body (110).

8. The gas supply device according to claim 7, characterized in that, The inflation connector (120) includes a quick-connect body for connecting to an inflation device, and the inflation control valve is an inflation check valve (103) integrated within the quick-connect body.

9. The gas supply device according to claim 7, characterized in that, The common airway (L1) is provided with a common airway check valve (115) at the end away from the branch airway (L2). The inflation connector (120) and the air supply connector (130) can be selectively connected to the end of the common airway (L1) provided with the common airway check valve (115), and the common airway check valve (115) is configured to open when either the inflation connector (120) or the air supply connector (130) is connected to reach a predetermined position.

10. The gas supply device according to claim 1, characterized in that, The gas supply device includes a container connection module (100), which includes a module body (110) having the container connection port (101) and a gas filling and supply joint (152) connected to the module body (110).

11. The gas supply device according to claim 10, characterized in that, The module body (110) includes a module base (150) and a switching unit (160) adjustablely mounted on the module base (150). The container connection port (101) and the inflation and gas supply joint (152) are located on the module base (150). The switching unit (160) has an inflation channel (L11) and a gas supply channel (L12). The switching unit (160) can be selectively switched so that the branch air channel (L2) and the inflation and gas supply joint (152) are interconnected through the inflation channel (L11) or the gas supply channel (L12).

12. The gas supply device according to claim 1, characterized in that, The gas supply device includes a container connection module (100), which includes a module body (110) having multiple container connection ports (101), a module base (150) connected to the module body (110), and a switching unit (160) adjustablely mounted on the module base (150). The module base (150) has a common inlet and outlet connector (152). The switching unit (160) has an inlet channel (L11) and an outlet channel (L12) formed therein. The switching unit (160) can be selectively switched so that the container connection ports (101) and the common inlet and outlet connector (152) are interconnected through the inlet channel (L11) or the outlet channel (L12).

13. The gas supply device according to any one of claims 1 to 12, characterized in that, It also includes a container (200) whose container opening is connected to the container connection port (101) to supply breathing gas to the common airway (L1) through the branch airway (L2), wherein the outlet of the container (200) is provided with an airflow control unit configured to limit the outlet flow rate of the container (200) at a predetermined pressure at least before connecting the corresponding container (200) to the container connection port (101) at a predetermined position.

14. The gas supply device according to claim 13, characterized in that, The airflow control unit includes a throttling orifice (201) located at the outlet of the container (200) to limit the airflow from the container (200) to the common air passage (L1) when the container (200) has a predetermined air pressure.

15. The gas supply device according to claim 14, characterized in that, The throttling orifice (201) is configured such that when the air pressure inside the container (200) is 2 atmospheres, the outflow rate of the container (200) does not exceed 10L / min.

16. The gas supply device according to claim 14, characterized in that, The container opening of the container (200) and the container connection port are integrated.

17. The gas supply device according to claim 13, characterized in that, The container opening of the container (200) is detachably connected to the container connection port (101). The airflow control unit includes a container check valve (202) located at the air outlet of the container (200). The container check valve (202) is configured to remain closed during the process of connecting the container (200) to the container connection port (101) until the container (200) is connected to a predetermined position and then opens.

18. The gas supply device according to claim 17, characterized in that, An internal thread is formed at the container connection port (101), and the container opening of the container (200) is provided with an external thread for screwing into the internal thread. The container one-way valve (202) is configured to remain closed during the process of screwing the container opening of the container (200) into the container connection port (101) until a predetermined number of screw turns are reached.

19. The gas supply device according to claim 17, characterized in that, The container one-way valve (202) includes a valve body (2021), a valve stem (2022) extending into the valve body (2021) and movable between an open position and a closed position, and a return spring (2023) elastically abutting against the valve stem (2022), the return spring (2023) causing the valve stem (2022) to tend to remain in the closed position; the branch air passage (L2) has a push rod (111) at one end facing the container connection port (101), and during the process of connecting the container (200) to the container connection port (101), the push rod (111) overcomes the elastic force of the return spring (2023) and pushes the valve stem (2022) toward the open position.

20. The gas supply device according to claim 17, characterized in that, The branch air passage (L2) is provided with a branch air passage check valve (114) at one end facing the container connection port (101). The branch air passage check valve (114) is configured to interact with the container check valve (202) and open simultaneously when the container (200) is connected to reach a predetermined position.

21. The gas supply device according to claim 13, characterized in that, It includes multiple containers (200), each of which has a volume of less than or equal to 1L.

22. The gas supply device according to claim 1, characterized in that, The container connection port (101) is provided with a sealing gasket (112) arranged around the inlet of the branch air passage (L2). When the container (200) is connected to the container connection port (101), the container opening of the container (200) is sealed against the sealing gasket (112).

23. The gas supply device according to claim 1, characterized in that, The branch airway (L2) is provided with a branch flow regulating valve (113), which can be adjusted to switch the on / off state of the branch airway (L2) and regulate the gas flow from the corresponding container (200) to the common airway (L1).

24. The gas supply device according to claim 1, characterized in that, The common air passage (L1) is provided with an output interface (LP) at the end away from the container (200), and the output interface (LP) is used to connect to the inflation control valve or the air supply control valve (140); When the output port (LP) is connected to an external inflation control valve, external gas is supplied to the container (200) through the common air passage (L1); when the inflation and gas supply joint (152) is connected to an external gas supply control valve (140), the gas inside the container (200) is supplied to the outside through the common air passage (L1).

25. The gas supply device according to claim 24, characterized in that, The output interface (LP) is provided with a first one-way valve, and the inflation control valve and the air supply control valve (140) are provided with a second one-way valve. When the inflation control valve or the air supply control valve (140) is connected to the output interface (LP), the first one-way valve and the second one-way valve cooperate to make the common air passage (L1) connected to the inflation control valve or the air supply control valve (140).

26. The gas supply device according to claim 24, characterized in that, The common airway (L1) includes an on / off switch (LS) located at the front end of the output interface (LP), which is used to control the opening and closing of the common airway (L1).

27. The gas supply device according to any one of claims 24-26, characterized in that, The output interface (LP) is threadedly connected to the inflation control valve or the air supply control valve (140).

28. The gas supply device according to any one of claims 24-26, characterized in that, The common airway (L1) also includes at least one of a pressure relief valve (105), a pressure indicator unit (104) for indicating the magnitude of the air pressure, and a safety valve (106) for limiting the maximum inflation pressure.

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