Distributed liquid oxygen oxygen source oxygen supply system

Abstract

The application provides a distributed liquid oxygen source oxygen supply system and belongs to the technical field of oxygen supply. The distributed liquid oxygen source oxygen supply system comprises an oxygen source box body and an oxygen inhalation user terminal. Two dewar bottles filled with liquid oxygen, an instrument and pipeline box, a gasifier and two ground scales are arranged in the oxygen source box body. The two dewar bottles are connected with the gasifier through liquid oxygen inlet and outlet valve pipelines in the instrument and pipeline box. The gasifier is connected with an outdoor pipeline through a pressure reducer pipeline in the instrument and pipeline box. The outdoor pipeline is connected with each oxygen inhalation user terminal. The application combines sensor sensing technology, electronic control technology, internet technology and liquid oxygen gasification, pressure reduction and delivery technology to provide a novel distributed liquid oxygen source oxygen supply system. Therefore, residents, hotels, offices and other oxygen requiring groups in plateau hypoxia areas can continuously and uninterruptedly use low-cost and high-quality medical grade oxygen for a long time.

Description

Technical Field

[0001] This invention belongs to the field of oxygen supply technology, specifically relating to a distributed liquid oxygen source supply system for use in high-altitude hypoxic areas and other areas or occasions requiring oxygen supply. Background Technology

[0002] With societal development, the demand for oxygen supply in high-altitude, oxygen-deficient areas is becoming increasingly urgent. Currently, oxygen concentrators are the primary method of supplying oxygen in these regions. However, oxygen concentrators have insurmountable drawbacks. First, oxygen concentrators use molecular sieve filtration, resulting in low oxygen purity (typically around 93%), and some harmful gases cannot be completely filtered out. Second, prolonged continuous operation can cause the molecular sieves to deteriorate, leading to frequent malfunctions and affecting long-term continuous oxygen supply. Third, the high energy consumption and operating costs associated with continuous oxygen supply make it difficult to widely adopt oxygen concentrators in high-altitude areas, severely hindering the development of oxygen supply services in these regions.

[0003] Medical-grade liquid oxygen (typically with a purity >99.5%) is undoubtedly the best choice for people with oxygen needs as it is a low-cost and high-quality oxygen source. However, how to ensure the continuous and uninterrupted supply of oxygen without human intervention has always been a challenge for the effective supply of liquid oxygen.

[0004] This invention addresses this problem by combining sensor sensing technology, electronic control technology, Internet technology with liquid oxygen vaporization, decompression, and transportation technology, effectively solving the problem of continuous liquid oxygen supply from both a technical and commercial implementation perspective. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a distributed liquid oxygen source supply system. Addressing the problems of existing technologies, this invention combines sensor sensing technology, electronic control technology, and internet technology with liquid oxygen vaporization, decompression, and delivery technologies to provide a novel distributed liquid oxygen source supply system. This system enables residents in high-altitude, oxygen-deficient areas, including homes, hotels, offices, and other oxygen-demanding populations, to continuously and uninterruptedly use low-cost, high-quality medical-grade oxygen for extended periods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A distributed liquid oxygen supply system includes an oxygen source housing and user terminals. The oxygen source housing contains two Dewar flasks filled with liquid oxygen, an instrument and piping box, a vaporizer, and two ground scales. The two Dewar flasks are connected to the vaporizer via liquid oxygen inlet / outlet valves inside the instrument and piping box. The vaporizer is connected to an outdoor pipeline via a pressure reducer inside the instrument and piping box. The outdoor pipeline is connected to each user terminal. The two ground scales are located below the two Dewar flasks.

[0008] The instrument and piping box contains a control circuit, a display screen, liquid oxygen inlet / outlet valves, and a pressure regulator. The control circuit is connected to a scale to monitor the weight of the Dewar flask. The control circuit is also connected to the liquid oxygen inlet / outlet valves for on / off control, and to the pressure regulator to monitor the pressure and flow rate within the piping. The display screen is connected to the control circuit for data display and command control.

[0009] Further defining the above scheme, the instrument and pipeline box is located in the middle of the oxygen source box, the two Dewar flasks are located inside the oxygen source box and placed on both sides of the instrument and pipeline box, and the vaporizer is located at the rear of the instrument and pipeline box.

[0010] Further specifying the above scheme, the liquid oxygen inlet / outlet valve pipeline includes a left liquid oxygen inlet / outlet valve pipeline and a right liquid oxygen inlet / outlet valve pipeline; the left liquid oxygen inlet / outlet valve pipeline includes a left liquid oxygen inlet pipeline, a left liquid oxygen outlet pipeline, a left cryogenic solenoid valve, and a left cryogenic manual shut-off valve. The left liquid oxygen inlet pipeline is connected to the outlet of a Dewar flask, and the left liquid oxygen outlet pipeline is connected to the inlet of the vaporizer. The left cryogenic solenoid valve and the left cryogenic manual shut-off valve... The right liquid oxygen inlet and outlet valve pipelines are connected in parallel between the left liquid oxygen inlet pipeline and the left liquid oxygen outlet pipeline; the right liquid oxygen inlet and outlet valve pipelines include a right liquid oxygen inlet pipeline, a right liquid oxygen outlet pipeline, a right cryogenic solenoid valve, and a right cryogenic manual shut-off valve. The right liquid oxygen inlet pipeline is connected to the outlet of another Dewar flask, the right liquid oxygen outlet pipeline is connected to the inlet of the vaporizer, and the right cryogenic solenoid valve and the right cryogenic manual shut-off valve are connected in parallel between the right liquid oxygen inlet pipeline and the right liquid oxygen outlet pipeline.

[0011] Further defining the above scheme, the pressure regulator pipeline includes a vaporizer oxygen interface and a vaporizer oxygen pipeline, a left Dewar flask pressure relief interface and a left Dewar flask pressure relief pipeline, a left pressure relief pipeline check valve, a right Dewar flask pressure relief interface and a right Dewar flask pressure relief pipeline, a right pressure relief pipeline check valve, a six-way pipeline, a pressure relief valve interface, a pressure gauge I interface, a first-stage pressure reducing valve with built-in pressure gauges before and after pressure reduction, a four-way pipeline, a pressure gauge II interface, a gas pressure sensor interface, an internal main valve of the pipeline box, a flow meter, and an external main valve of the pipeline box.

[0012] One end of the vaporizer oxygen line is connected to the vaporizer outlet via the vaporizer oxygen interface. One end of the left Dewar flask pressure relief line is connected to a pressure relief port on a Dewar flask via the left Dewar flask pressure relief interface. One end of the right Dewar flask pressure relief line is connected to a pressure relief port on another Dewar flask via the right Dewar flask pressure relief interface. The other end of the vaporizer oxygen line is connected to the first interface on the six-way pipe. The other end of the left Dewar flask pressure relief line is connected to the second interface on the six-way pipe via the left pressure relief line check valve. The other end of the right Dewar flask pressure relief line is connected to the third interface on the six-way pipe via the right pressure relief line check valve. The fourth interface on the six-way pipe is a pressure relief valve. The six-way pipe has an interface and is connected to a pressure relief valve. The fifth interface on the six-way pipe is a pressure gauge I interface and is connected to pressure gauge I. The sixth interface on the six-way pipe is connected to the inlet of a primary pressure reducing valve. The outlet of the primary pressure reducing valve is connected to the first interface of a four-way pipe. The second interface on the four-way pipe is a pressure gauge II interface and is connected to pressure gauge II. The third interface on the four-way pipe is a gas pressure sensor interface and is connected to a gas pressure sensor. The fourth interface on the four-way pipe is connected to the inlet of the main valve inside the pipe box. The outlet of the main valve inside the pipe box is connected to the inlet of a flow meter. The outlet of the flow meter is connected to the inlet of the main valve outside the pipe box. The outlet of the main valve outside the pipe box is connected to an outdoor pipeline.

[0013] Further defining the above scheme, the control circuit includes a microcontroller and peripheral circuits. The control circuit is connected to two scales via RS-485 serial interface 1 and RS-485 serial interface 2 to collect and transmit Dewar flask weight data. The control circuit is connected to a flow meter via RS-485 serial interface 4 to collect and transmit data. The control circuit is connected to a gas pressure sensor via an A / D interface to collect and transmit data. The control circuit is connected to the left and right cryogenic solenoid valves via left and right cryogenic solenoid valve control circuits to transmit solenoid valve control signals. The control circuit is connected to a display screen via a universal serial port to transmit displayed data. The control circuit also includes an altitude sensor.

[0014] Further limitations of the above scheme include a remote control terminal, wherein the control circuit is connected to the 4G module via an RS-485 serial interface 3, the 4G module is located inside the instrument and pipeline box, the remote control terminal communicates with the 4G module via the Internet, and the remote control terminal communicates with the oxygen inhalation user terminal via the Internet.

[0015] Further defining the above solution, the oxygen user terminal is equipped with a two-stage pressure reducing valve. The oxygen user terminal has a built-in miniature solenoid valve and control circuit. The control circuit includes a 4G module chip and a SIM card. It communicates with a remote control terminal via the Internet. The oxygen user terminal sends oxygen usage data to the remote control terminal and receives control commands from the remote control terminal. The user payment QR code of the oxygen user terminal is displayed on the LCD screen of the oxygen user terminal.

[0016] Further specifying the above scheme, the oxygen source box is equipped with an oxygen concentration alarm inside for monitoring the oxygen concentration inside the oxygen source box, and the oxygen source box is equipped with an explosion-proof fan outside for discharging high concentrations of oxygen outside the box.

[0017] Further specifying the above scheme, the oxygen source box is equipped with an electrostatic discharge device on its exterior, and a fire extinguisher box is also provided on its exterior.

[0018] As a further limitation of the above scheme, an external power distribution box is provided outside the oxygen source box, and the power distribution box is connected to the power conversion circuit in the control circuit through an AC / DC power module.

[0019] Advantages of this invention compared to existing technologies:

[0020] 1. This solution uses liquid oxygen supply, which, compared to existing oxygen generators, provides medical-grade oxygen in terms of purity and quality, greatly improving the user's oxygen quality. This is especially beneficial for people with pulmonary heart disease, significantly improving their quality of life and extending their lifespan.

[0021] 2. This solution uses liquid oxygen supply, which significantly reduces the user's oxygen cost compared to the existing oxygen generator supply method, making it possible for people in high-altitude, oxygen-deficient areas to have access to oxygen on a daily basis.

[0022] 3. This solution combines sensor sensing technology, electronic control technology, Internet technology and liquid oxygen supply technology to realize distributed liquid oxygen supply, making large-scale oxygen supply in high-altitude hypoxic areas a technical reality.

[0023] 4. This solution adopts a payment method of scanning a QR code on the user's mobile phone at the oxygen inhalation terminal. The operation is very simple. Users can pay for oxygen without leaving home, which provides a convenient way for the commercial realization and promotion of distributed liquid oxygen source supply system.

[0024] 5. The various subsystems of this solution are technologically mature and easy to mass-produce and control costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external appearance of a distributed liquid oxygen source supply system according to the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the external appearance of a distributed liquid oxygen source supply system according to the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the left liquid oxygen inlet / outlet valve pipeline in a distributed liquid oxygen source supply system according to the present invention.

[0028] Figure 4 This is a schematic diagram of the right liquid oxygen inlet and outlet pipeline in a distributed liquid oxygen source supply system of the present invention.

[0029] Figure 5 This is a front view schematic diagram of the pressure reducer pipeline in a distributed liquid oxygen source supply system according to the present invention.

[0030] Figure 6 This is a top view schematic diagram of the pressure reducer pipeline in a distributed liquid oxygen source supply system according to the present invention.

[0031] Figure 7 This is a block diagram illustrating the gas path and electrical control principle of a distributed liquid oxygen source supply system according to the present invention. Detailed Implementation

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

[0033] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Please see Figure 1-7 The embodiments of the present invention are described in detail below.

[0035] Example: See Figure 1 and 2 As shown, a distributed liquid oxygen supply system includes an oxygen source housing 1 and an oxygen user terminal. The oxygen source housing 1 serves as a protective facility for other functional units of the system, ensuring that the oxygen source can be used normally in outdoor environments.

[0036] The oxygen source housing 1 contains two Dewar flasks 2 filled with liquid oxygen, an instrument and pipeline box 3, a vaporizer 4, and two floor scales 5. The two Dewar flasks 2 are connected to the vaporizer 4 through liquid oxygen inlet and outlet valves inside the instrument and pipeline box 3. The vaporizer 4 is connected to an outdoor pipeline through a pressure reducer pipeline inside the instrument and pipeline box 3. The outdoor pipeline is connected to each oxygen user terminal. The two floor scales 5 are respectively located at the bottom of the two Dewar flasks 2.

[0037] In one specific implementation: See Figure 1 As shown, the instrument and pipeline box 3 is located in the middle of the oxygen source box 1, near the front. Two Dewar flasks 2 are located inside the oxygen source box 1 and positioned on the left and right sides of the instrument and pipeline box 3. The vaporizer 4 is located at the rear of the instrument and pipeline box 3. Two weighing scales 5 are installed in the left and right weighing pits at the bottom of the oxygen source box 1, with the weighing surface of the scales 5 flush with the floor inside the oxygen source box 1, facilitating the placement of the Dewar flasks onto the scales for weight monitoring.

[0038] In one specific embodiment: the instrument and pipeline box 3 is equipped with a control circuit 41, a display screen 42, liquid oxygen inlet and outlet valve pipelines, and a pressure reducer pipeline inside the box and on the panel. The control circuit 41 is connected to the scale 5 to monitor the weight of the Dewar flask 2. The control circuit 41 is connected to the liquid oxygen inlet and outlet valve pipeline to control its opening and closing. The control circuit 41 is connected to the pressure reducer pipeline to monitor the pressure and flow rate inside the pipeline. The display screen 42 is connected to the control circuit 41 for data display and command control.

[0039] Among them, see Figure 3 and 4As shown, the liquid oxygen inlet / outlet valve pipeline includes a left liquid oxygen inlet / outlet valve pipeline and a right liquid oxygen inlet / outlet valve pipeline; the left liquid oxygen inlet / outlet valve pipeline includes a left liquid oxygen inlet pipeline 11, a left liquid oxygen outlet pipeline 12, a left cryogenic solenoid valve 15, and a left cryogenic manual shut-off valve 17. The left liquid oxygen inlet pipeline 11 is connected to the outlet of a Dewar flask 2, and the left liquid oxygen outlet pipeline 12 is connected to the inlet of a vaporizer 4. The left cryogenic solenoid valve 15 and the left cryogenic manual shut-off valve 17 are connected in parallel to the left liquid oxygen inlet / outlet valve 17. Between the inlet pipe 11 and the left liquid oxygen outlet pipe 12; the right liquid oxygen inlet / outlet valve pipe includes a right liquid oxygen inlet pipe 14, a right liquid oxygen outlet pipe 13, a right cryogenic solenoid valve 16, and a right cryogenic manual shut-off valve 18. The right liquid oxygen inlet pipe 14 is connected to the outlet of another Dewar flask 2, and the right liquid oxygen outlet pipe 13 is connected to the inlet of the vaporizer 4. The right cryogenic solenoid valve 16 and the right cryogenic manual shut-off valve 18 are connected in parallel between the right liquid oxygen inlet pipe 14 and the right liquid oxygen outlet pipe 13. The left and right cryogenic solenoid valves are connected in parallel with the left and right cryogenic manual shut-off valves, respectively. When the cryogenic solenoid valves fail, the cryogenic manual shut-off valves are opened for emergency use.

[0040] Among them, see Figure 5 and 6 As shown, the pressure regulator piping includes a vaporizer oxygen interface 20 and a vaporizer oxygen pipeline 23, a left Dewar flask pressure relief interface 19 and a left Dewar flask pressure relief pipeline 22, a left pressure relief pipeline check valve 26, a right Dewar flask pressure relief interface 21 and a right Dewar flask pressure relief pipeline 24, a right pressure relief pipeline check valve 27, a six-way pipeline 25 (composed of four-way 1 and four-way 2 combined), a pressure relief valve interface 28, a pressure gauge I interface 29, a first-stage pressure reducing valve 30 with built-in pressure gauges before and after pressure reduction, a four-way pipeline 31, a pressure gauge II interface 32, a gas pressure sensor interface 33, an internal main valve 34 of the pipeline box, a flow meter 35, and an external main valve 36 of the pipeline box. These components are connected in series to form the pressure regulator piping of the liquid oxygen source supply system.

[0041] For details, please refer to Figure 5 and 6As shown, one end of the vaporizer oxygen line 23 is connected to the outlet of the vaporizer 4 via the vaporizer oxygen interface 20. One end of the left Dewar flask pressure relief line 22 is connected to the pressure relief port on a Dewar flask 2 via the left Dewar flask pressure relief interface 19. One end of the right Dewar flask pressure relief line 24 is connected to the pressure relief port on another Dewar flask 2 via the right Dewar flask pressure relief interface 21. The other end of the vaporizer oxygen line 23 is connected to the first interface on the six-way line 25. The other end of the left Dewar flask pressure relief line 22 is connected to the second interface on the six-way line 25 via the left pressure relief line check valve 26. The other end of the right Dewar flask pressure relief line 24 is connected to the third interface on the six-way line 25 via the right pressure relief line check valve 27. The fourth interface on the six-way line 25 is the pressure relief valve interface 28 and is connected to the pressure relief valve 37. The fifth interface on the six-way line 25 is the pressure gauge I interface 29 and is connected to the pressure gauge I. 38. The sixth port on the six-way pipe 25 is connected to the inlet of the first-stage pressure reducing valve 30. The outlet of the first-stage pressure reducing valve 30 is connected to the first port of the four-way pipe 31. The second port on the four-way pipe 31 is the pressure gauge II port 32 and is connected to the pressure gauge II 39. The third port on the four-way pipe 31 is the gas pressure sensor port 33 and is connected to the gas pressure sensor 40. The fourth port on the four-way pipe 31 is connected to the inlet of the main valve 34 inside the pipe box. The outlet of the main valve 34 inside the pipe box is connected to the inlet of the flow meter 35. The outlet of the flow meter 35 is connected to the inlet of the main valve 36 outside the pipe box. The outlet of the main valve 36 outside the pipe box is connected to the outdoor pipeline.

[0042] The oxygen in this distributed liquid oxygen supply system undergoes a two-stage depressurization process before pressure reduction. The first stage involves the oxygen vaporized in the Dewar flask passing through the depressurization port, a one-way valve, and the four-way valve (position 1) in the six-way pipeline when the pressure exceeds the depressurization pressure of the Dewar flask. The second stage of depressurization occurs when the pressure in the main oxygen pipeline exceeds the pressure of the main pipeline depressurization valve, at which point the oxygen is discharged outside the pipeline through the depressurization valve.

[0043] Among them, see Figure 7 As shown, the control circuit 41 includes a microcontroller and peripheral circuits. The control circuit 41 is connected to two scales 5 via RS-485 serial interfaces 1 and 2 for acquiring and transmitting Dewar flask weight data. The control circuit 41 is connected to a flow meter 35 via RS-485 serial interface 4 for data acquisition and transmission. The control circuit 41 is connected to a gas pressure sensor 40 via an A / D interface for data acquisition and transmission. The control circuit 41 is connected to a left cryogenic solenoid valve 15 and a right cryogenic solenoid valve 16 via left and right cryogenic solenoid valve control circuits for transmitting control signals. The control circuit 41 is connected to a display screen 42 via a universal serial port for transmitting display data; the display screen is an LCD screen. The control circuit 41 also contains an altitude sensor.

[0044] In one specific embodiment: it also includes a remote control terminal. The control circuit 41 is connected to the 4G module 43 through the RS-485 serial interface 3. The 4G module 43 is located inside the instrument and pipeline box 3. The remote control terminal communicates with the 4G module 43 through the Internet. The remote control terminal also communicates with the oxygen inhalation user terminal through the Internet.

[0045] The oxygen user terminal is equipped with a two-stage pressure reducing valve. The two-stage pressure reducer and the user terminal are installed indoors in homes, hotels, offices, etc., and are connected to a distributed liquid oxygen source via outdoor oxygen pipelines. Oxygen is supplied to the user through the oxygen outlet on the terminal. The user terminal has a built-in miniature solenoid valve and control circuit. The control circuit includes a 4G module chip and a SIM card, enabling communication with a remote control terminal via the internet. The user terminal sends oxygen usage data to the remote control terminal and receives control commands from the remote control terminal. The user's payment QR code is displayed on the user terminal's LCD screen.

[0046] In addition, the upper panel of the instrument and piping box 3 has seven pipe fitting interfaces and pressure-resistant hoses, including the left and right liquid oxygen inlet and outlet pipes, the pressure reducing valve pipe, the liquid oxygen outlet and pressure relief port of the left and right Dewar flasks, and the left and right liquid oxygen inlet and outlet of the vaporizer, to facilitate connection with the pipes of the Dewar flasks and vaporizer.

[0047] On the left side of the front panel of Instrument and Piping Box 3, a pointer-type pressure gauge is installed to measure the oxygen pressure before and after the first-stage depressurization. On the right side of the front panel of Instrument and Piping Box 3, the control box for the distributed liquid oxygen supply system is installed. The control box consists of an LCD screen and control circuit board on the front panel, as well as a panel and rear cover with switches and indicator lights.

[0048] The control box on the panel of the liquid oxygen source instrument and pipeline box has two external connectors. Through cables, they are connected to the AC / DC power module, left and right weighbridges, left and right cryogenic solenoid valves, 4G module, flow meter, and gas pressure sensor in the distribution box, respectively, to complete the functions of power supply, receiving and sending signals such as weight, flow, and pressure, controlling the on and off of cryogenic solenoid valves, and displaying relevant information.

[0049] In the above structure, the control circuit, the two weighbridges on the left and right, the left and right cryogenic solenoid valves, the gas pressure sensor, the 4G module, and the LCD screen are all electrical control systems of the liquid oxygen source supply system.

[0050] The function of the control circuit is:

[0051] 1) The weight data of the Dewar flasks on the left and right scales is received through the RS-485 serial interface. After being processed by the microcontroller, the weight data of the left and right Dewar flasks and the percentage of remaining oxygen in the left and right Dewar flasks are sent to the LCD screen and displayed on the LCD screen.

[0052] 2) Receive oxygen flow data from the flow meter via the RS-485 serial interface and send it to the LCD screen for display;

[0053] 3) The analog oxygen pressure in the main pipeline after pressure reduction by the first-stage pressure reducing valve, received from the gas pressure sensor, is converted into digital oxygen flow data from the flow meter and sent to the LCD screen for display.

[0054] 4) Process the altitude and temperature data sensed by the altitude sensor on the control circuit board and send them to the LCD screen for display.

[0055] 5) Receive the control commands for the left and right low-temperature solenoid valves from the LCD screen, process them through the microcontroller, and send control signals for the left and right low-temperature solenoid valves. The left and right low-temperature solenoid valve drive circuit drives the opening and closing of the left and right low-temperature solenoid valves.

[0056] 6) Receive the liquid oxygen source number data set on the LCD screen and store it in the memory;

[0057] 7) Receive the left and right Dewar flask number data set on the LCD screen and store it in the memory;

[0058] 8) Send the weight data of the left and right Dewar bottles, oxygen flow rate data, liquid oxygen source number data, left and right Dewar bottle number data, altitude and temperature data to the 4G module via the RS-485 serial interface;

[0059] 9) Receive the control commands for the left and right cryogenic solenoid valves sent by the 4G module through the RS-485 serial interface, process them through the microcontroller, and send out control signals for the left and right cryogenic solenoid valves. The left and right cryogenic solenoid valve drive circuit drives the opening and closing of the left and right cryogenic solenoid valves.

[0060] 10) Receive liquid oxygen source number data and left and right Dewar bottle number data sent by the 4G module through the RS-485 serial interface, and send them to the LCD screen for display.

[0061] The function of an LCD screen is:

[0062] 1) Receive the weight data of the left and right Dewar flasks, the percentage of remaining oxygen, the oxygen flow rate, the liquid oxygen source number, the left and right Dewar flask numbers, the altitude and temperature data sent by the control circuit, and display them in the form of "graphics + numbers";

[0063] 2) The human-machine interaction function is realized through the touch screen, which realizes the setting of liquid oxygen source number, the setting of left and right Dewar bottle number, and the on and off control of left and right cryogenic solenoid valves, and sends the data to the control circuit for processing.

[0064] The function of the 4G module is:

[0065] 1) Receive data on the weight of the left and right Dewar flasks, oxygen flow rate, liquid oxygen source number, left and right Dewar flask number, altitude and temperature from the control circuit board via the RS-485 serial interface, and transmit this data to the remote control terminal (personal computer or mobile phone) via antenna and Internet.

[0066] 2) Receive control commands for the left and right cryogenic solenoid valves from the remote control terminal (personal computer or mobile phone) and send these commands to the control circuit via the RS-485 interface;

[0067] 3) Receive liquid oxygen source number data and left and right Dewar bottle number data sent by the remote control terminal (personal computer or mobile phone), and send this data to the control circuit through the RS-485 interface.

[0068] In one specific implementation: See Figure 1 , 2 As shown, an oxygen concentration alarm 6 is installed on the right side of the interior of the oxygen source box 1 to monitor the oxygen concentration inside the box. An explosion-proof fan 9 is installed outside the box to discharge high-concentration oxygen. When the oxygen concentration released from the pipeline pressure relief valve reaches a certain level, the oxygen concentration alarm 6 sends a control signal to control the explosion-proof fan 9 to operate, discharging the high-concentration oxygen outside the box.

[0069] The oxygen source box 1 is equipped with an electrostatic discharger 10 on the outside. The electrostatic discharger 10 is hung on the left side of the outside of the box and is used by the liquid oxygen source personnel to release the static electricity carried on their bodies when working, so as to ensure the safety of the oxygen source.

[0070] The oxygen source box 1 is equipped with a fire extinguisher box 8 on the right side of the exterior. The fire extinguisher box 8 contains two fire extinguishers for easy use in case of fire.

[0071] An explosion-proof distribution box 7 is located on the right side of the oxygen source housing 1. The distribution box 7 is connected to the power conversion circuit in the control circuit 41 via an AC / DC power module 44. It can be connected to an external 220V / 50Hz AC power supply to power the liquid oxygen source. The distribution box also has a built-in AC-to-DC power module to provide the required DC 24V power to the oxygen source control box. The distribution box also has terminals for powering the oxygen concentration alarm 6 and the explosion-proof fan 9.

[0072] The control principle of this invention is as follows: A distributed liquid oxygen source supply system uses two Dewar flasks for storing liquid oxygen. The usage mode is "one in use and one on standby", that is, one Dewar flask is in "use" state and the other is in "standby" state.

[0073] Two Dewar flasks containing liquid oxygen are placed on two scales, one on the left and one on the right. The scales monitor the weight of the two Dewar flasks and send the weight data to the control circuit. The microcontroller on the control circuit determines whether the liquid oxygen in the two Dewar flasks has been consumed.

[0074] When the distributed liquid oxygen supply system is in operation, the cryogenic solenoid valves on the liquid oxygen inlet and outlet pipelines of the "in use" Dewar flask are in the "open" state. Liquid oxygen enters the vaporizer through the pipeline for vaporization, and after two stages of pressure reduction, it is delivered to the user through the pipeline. At this time, the cryogenic solenoid valves on the liquid oxygen inlet and outlet pipelines of the "standby" Dewar flask are in the "closed" state, and liquid oxygen cannot enter the vaporizer through the pipeline.

[0075] When the liquid oxygen in the "in-use" Dewar flask is depleted, the microcontroller on the control circuit detects the weight of the Dewar flask that has run out of liquid oxygen and controls the closing of the cryogenic solenoid valve on this side of the pipeline. At the same time, it opens the cryogenic solenoid valve on the "standby" side of the pipeline, allowing the liquid oxygen in the "standby" Dewar flask to enter the vaporizer, thus achieving the switch from "standby" to "in-use" and ensuring continuous oxygen output.

[0076] The microcontroller in the control circuit, while controlling the switching of the left and right cryogenic solenoid valves, also sends the weight and serial number data of the dewar bottle that has run out of liquid oxygen to the remote control terminal via a 4G module and the Internet, reminding the oxygen supplier to replace the dewar bottle that has run out of liquid oxygen in time.

[0077] The cryogenic solenoid valves used in the distributed liquid oxygen supply system are normally closed solenoid valves. In the event of a malfunction of the cryogenic solenoid valve, the left and right cryogenic manual shut-off valves can be manually opened to allow emergency use of the liquid oxygen supply system.

[0078] Vaporized oxygen is piped to the user's oxygen inhalation terminal indoors. When the user has already paid, they simply press the oxygen inhalation switch on the remote control attached to the terminal to inhale oxygen from the outlet. When the user is in arrears, they simply scan the QR code on the LCD screen with their mobile phone to pay the fee and then inhale oxygen from the outlet.

[0079] The principle of this invention is as follows: When supplying oxygen, the left or right liquid oxygen inlet / outlet solenoid valves can be connected by operating the LCD screen of the liquid oxygen source control box or the mobile APP to supply oxygen.

[0080] The secondary pressure reducer and oxygen user terminal are installed indoors in homes, hotels, offices, etc. They are connected to the liquid oxygen source through an outdoor pipeline between the liquid oxygen supply system box and the building using oxygen, and oxygen is supplied to the user through the oxygen outlet on the user terminal.

[0081] When a user has already paid, they can simply press the oxygen inhalation switch on the remote control that comes with the user terminal to inhale oxygen from the terminal's outlet. When a user is in arrears, they can simply scan the QR code on the LCD screen with their mobile phone to pay the fee and then inhale oxygen from the terminal's outlet.

[0082] In summary, this invention employs a dual Dewar flask liquid oxygen supply system with one flask in use and one on standby. Liquid oxygen is vaporized by a vaporizer and depressurized by a pressure reducer before being piped to users. To ensure continuous and uninterrupted oxygen supply, two scales are used in the liquid oxygen supply system to weigh the two Dewar flasks separately. The weight data is sent to the microcontroller in the control circuit to determine if the liquid oxygen in the Dewar flasks is depleted. This determines whether the liquid oxygen in the flasks is exhausted and switches the solenoid valves of the liquid oxygen output pipelines of the "use" and "standby" Dewar flasks, thus switching the liquid oxygen output between the "use" and "standby" Dewar flasks. Simultaneously, the control circuit sends the weight data to a 4G module, which then uploads it to a remote control terminal via a wireless network, reminding users to replace the depleted Dewar flask in a timely manner. This ensures a long-term, continuous, and uninterrupted supply of liquid oxygen, ultimately enabling the formation of a distributed oxygen supply network in vast oxygen-deficient areas and meeting the demand for high-quality, low-cost oxygen for people in these regions.

[0083] The control program involved in this distributed liquid oxygen source supply system has obtained a computer program software copyright certificate, therefore the control program in this invention belongs to the prior art.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A distributed liquid oxygen source supply system, characterized in that: The distributed liquid oxygen supply system includes an oxygen source box (1) and oxygen user terminals. The oxygen source box (1) is equipped with two Dewar flasks (2) containing liquid oxygen, an instrument and pipeline box (3), a vaporizer (4), and two weighbridges (5). The two Dewar flasks (2) are connected to the vaporizer (4) through liquid oxygen inlet and outlet valves inside the instrument and pipeline box (3). The vaporizer (4) is connected to an outdoor pipeline through a pressure reducer pipeline inside the instrument and pipeline box (3). The outdoor pipeline is connected to each oxygen user terminal. The two weighbridges (5) are respectively located at the bottom of the two Dewar flasks (2). The instrument and pipeline box (3) is equipped with a control circuit (41), a display screen (42), liquid oxygen inlet and outlet valve pipelines, and a pressure reducer pipeline inside and on the panel. The control circuit (41) is connected to the weighbridge (5) to monitor the weight of the Dewar flask (2). The control circuit (41) is connected to the liquid oxygen inlet and outlet valve pipeline to control its opening and closing. The control circuit (41) is connected to the pressure reducer pipeline to monitor the pressure and flow rate inside the pipeline. The display screen (42) is connected to the control circuit (41) for data display and command control. The liquid oxygen inlet and outlet valve pipeline includes a left liquid oxygen inlet and outlet valve pipeline and a right liquid oxygen inlet and outlet valve pipeline; the left liquid oxygen inlet and outlet valve pipeline includes a left liquid oxygen inlet pipeline (11), a left liquid oxygen outlet pipeline (12), a left cryogenic solenoid valve (15), and a left cryogenic manual shut-off valve (17). The left liquid oxygen inlet pipeline (11) is connected to the outlet of a Dewar flask (2), the left liquid oxygen outlet pipeline (12) is connected to the inlet of a vaporizer (4), and the left cryogenic solenoid valve (15) and the left cryogenic manual shut-off valve (17) are connected in parallel to the left liquid oxygen inlet pipeline (11). 1) Between the right liquid oxygen inlet and outlet pipeline (12); The right liquid oxygen inlet and outlet valve pipeline includes the right liquid oxygen inlet pipeline (14), the right liquid oxygen outlet pipeline (13), the right cryogenic solenoid valve (16), and the right cryogenic manual shut-off valve (18). The right liquid oxygen inlet pipeline (14) is connected to the outlet of another Dewar flask (2), the right liquid oxygen outlet pipeline (13) is connected to the inlet of the vaporizer (4), and the right cryogenic solenoid valve (16) and the right cryogenic manual shut-off valve (18) are connected in parallel between the right liquid oxygen inlet pipeline (14) and the right liquid oxygen outlet pipeline (13). The pressure regulator pipeline includes a vaporizer oxygen interface (20) and a vaporizer oxygen pipeline (23), a left Dewar flask pressure relief interface (19) and a left Dewar flask pressure relief pipeline (22), a left pressure relief pipeline check valve (26), a right Dewar flask pressure relief interface (21) and a right Dewar flask pressure relief pipeline (24), a right pressure relief pipeline check valve (27), a six-way pipeline (25), a pressure relief valve interface (28), a pressure gauge I interface (29), a first-stage pressure reducing valve (30) with built-in pressure gauges before and after pressure reduction, a four-way pipeline (31), a pressure gauge II interface (32), a gas pressure sensor interface (33), an internal main valve of the pipeline box (34), a flow meter (35), and an external main valve of the pipeline box (36). One end of the vaporizer oxygen pipeline (23) is connected to the outlet of the vaporizer (4) via the vaporizer oxygen interface (20). One end of the left Dewar flask depressurization pipeline (22) is connected to the depressurization port on a Dewar flask (2) via the left Dewar flask depressurization interface (19). One end of the right Dewar flask depressurization pipeline (24) is connected to the depressurization port on another Dewar flask (2) via the right Dewar flask depressurization interface (21). The vaporizer oxygen pipeline ( 23) The other end is connected to the first interface on the six-way pipe (25). The other end of the left Dewar flask pressure relief pipe (22) is connected to the second interface on the six-way pipe (25) through the left pressure relief pipe check valve (26). The other end of the right Dewar flask pressure relief pipe (24) is connected to the third interface on the six-way pipe (25) through the right pressure relief pipe check valve (27). The fourth interface on the six-way pipe (25) is the pressure relief valve interface (28) and is connected to The pressure relief valve (37) has a pressure gauge I interface (29) on the six-way pipe (25) and is connected to pressure gauge I (38). The sixth interface on the six-way pipe (25) is connected to the inlet of the first-stage pressure reducing valve (30). The outlet of the first-stage pressure reducing valve (30) is connected to the first interface of the four-way pipe (31). The second interface on the four-way pipe (31) is a pressure gauge II interface (32) and is connected to pressure gauge II (39). The third interface on the four-way pipe (31) is a gas pressure sensor interface (33) and is connected to gas pressure sensor (40). The fourth interface on the four-way pipe (31) is connected to the inlet of the main valve (34) inside the pipe box. The outlet of the main valve (34) inside the pipe box is connected to the inlet of the flow meter (35). The outlet of the flow meter (35) is connected to the inlet of the main valve (36) outside the pipe box. The outlet of the main valve (36) outside the pipe box is connected to the outdoor pipeline.

2. The distributed liquid oxygen source supply system according to claim 1, characterized in that: The instrument and pipeline box (3) is located in the middle of the oxygen source box (1) at the front position. The two Dewar bottles (2) are located inside the oxygen source box (1) and placed on both sides of the instrument and pipeline box (3). The vaporizer (4) is located at the rear of the instrument and pipeline box (3).

3. The distributed liquid oxygen source supply system according to claim 1, characterized in that: The control circuit (41) includes a microcontroller and peripheral circuits. The control circuit (41) is connected to two scales (5) via RS-485 serial interface 1 and RS-485 serial interface 2 to collect and transmit Dewar bottle weight data. The control circuit (41) is connected to a flow meter (35) via RS-485 serial interface 4 to collect and transmit data. The control circuit (41) is connected to a gas pressure sensor (40) via an A / D interface to collect and transmit data. The control circuit (41) is connected to a left low-temperature solenoid valve (15) and a right low-temperature solenoid valve (16) via a left and right low-temperature solenoid valve control circuit to transmit solenoid valve control signals. The control circuit (41) is connected to a display screen (42) via a universal serial port to transmit display data. The control circuit (41) also has an altitude sensor inside.

4. The distributed liquid oxygen source supply system according to claim 1, characterized in that: The system also includes a remote control terminal. The control circuit (41) is connected to the 4G module (43) via the RS-485 serial interface 3. The 4G module (43) is located inside the instrument and pipeline box (3). The remote control terminal communicates with the 4G module (43) via the Internet. The remote control terminal also communicates with the oxygen inhalation user terminal via the Internet.

5. A distributed liquid oxygen source supply system according to claim 4, characterized in that: The oxygen user terminal is equipped with a two-stage pressure reducing valve. The oxygen user terminal has a built-in miniature solenoid valve and control circuit. The control circuit includes a 4G module chip and a SIM card. It communicates with the remote control terminal via the Internet. The oxygen user terminal sends oxygen usage data to the remote control terminal and receives control commands from the remote control terminal. The user payment QR code of the oxygen user terminal is displayed on the LCD screen of the oxygen user terminal.

6. A distributed liquid oxygen source supply system according to claim 1, characterized in that: The oxygen source box (1) is equipped with an oxygen concentration alarm (6) inside and is used to monitor the oxygen concentration inside the oxygen source box (1). The oxygen source box (1) is equipped with an explosion-proof fan (9) outside and is used to discharge high concentrations of oxygen outside the box.

7. A distributed liquid oxygen source supply system according to claim 1, characterized in that: The oxygen source box (1) is equipped with an electrostatic discharger (10) on the outside, and a fire extinguisher box (8) is equipped on the outside of the oxygen source box (1).

8. A distributed liquid oxygen source supply system according to claim 1, characterized in that: The oxygen source box (1) is equipped with a power distribution box (7) on the outside. The power distribution box (7) is connected to the power conversion circuit in the control circuit (41) through an AC / DC power module (44).

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