Distributed liquid oxygen source oxygen supply system

Abstract

The invention 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 uptake user terminal, wherein two Dewar flasks filled with liquid oxygen, an instrument and pipeline box, a vaporizer and two weighbridges are arranged in the oxygen source box body; the two Dewar flasks are connected with the vaporizer through the instrument and a liquid oxygen inlet and outlet valve pipeline in the pipeline box, the vaporizer is connected with the outdoor pipeline through the instrument and a pressure reducer pipeline in the pipeline box, and the outdoor pipeline is connected to each oxygen inhalation user terminal. A sensor sensing technology, an electronic control technology, an internet technology and a liquid oxygen gasification, pressure reduction and conveying technology are combined, and a brand new distributed liquid oxygen source oxygen supply system is provided, so that resident families, hotels, hotels, office facilities or other people needing oxygen in plateau oxygen-deficient areas can supply oxygen to the oxygen-deficient areas. And medical-grade oxygen with low cost and high quality can be continuously used for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of oxygen supply, and in particular relates to a distributed liquid oxygen source oxygen supply system for supplying oxygen to highland hypoxic areas and other areas or occasions requiring oxygen supply. Background Art

[0002] With the development of society, people in hypoxic areas of the plateau have an increasingly urgent need for oxygen supply. At present, in plateau areas, oxygen generators are mainly used for oxygen supply. However, there are insurmountable defects in oxygen supply by oxygen generators. First, oxygen generators use molecular sieve filtration to produce low purity oxygen (usually around 93%), and some harmful gases cannot be completely filtered out; second, the oxygen generator works continuously for a long time, the molecular sieve is prone to failure, and the oxygen generator is prone to malfunction, affecting long-term continuous oxygen supply; third, the use of oxygen generators for oxygen supply consumes huge electricity for long-term continuous oxygen supply, and the cost of use is very high, making it difficult to widely promote the use of oxygen generators in plateau areas, thus seriously restricting the development of oxygen supply in hypoxic areas of the plateau.

[0003] Medical-grade liquid oxygen (usually with a purity of >99.5%) is undoubtedly the best choice for people who need oxygen as a low-cost and high-quality oxygen source. However, how to continuously output oxygen without human intervention has always been a problem that plagues the effective supply of liquid oxygen.

[0004] The present invention is aimed at this problem. It combines sensor sensing technology, electronic control technology, Internet technology with liquid oxygen gasification, pressure reduction and transportation technology, and effectively solves the problem of continuous supply of liquid oxygen from the technical point of view and the technical approach of commercial realization. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a distributed liquid oxygen source oxygen supply system. In view of the problems of the prior art, the present invention combines sensor sensing technology, electronic control technology, Internet technology with liquid oxygen gasification, decompression and transportation technology to provide a new distributed liquid oxygen source oxygen supply system, so that residents' families, hotels, offices, or other oxygen-demanding people in high-altitude oxygen-deficient areas can use low-cost, high-quality medical-grade oxygen for a long time and continuously.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A distributed liquid oxygen source oxygen supply system comprises an oxygen source box and an oxygen inhalation user terminal. Two dewar bottles filled with liquid oxygen, an instrument and pipeline box, a vaporizer, and two floor scales are arranged inside the oxygen source box; the two dewar bottles are connected to the vaporizer through the liquid oxygen inlet and outlet valve pipelines inside the instrument and pipeline box, the vaporizer is connected to the outdoor pipeline through the pressure reducer pipeline inside the instrument and pipeline box, and the outdoor pipeline is connected to each oxygen inhalation user terminal; the two floor scales are respectively arranged at the lower parts of the two dewar bottles.

[0008] The control circuit, display screen, liquid oxygen inlet and outlet valve pipelines, and pressure reducer pipelines are arranged inside and on the panel of the instrument and pipeline box. The control circuit is connected to the floor scale to monitor the weight of the Dewar flask. The control circuit is connected to the liquid oxygen inlet and outlet valve pipelines to control the switch thereof. The control circuit is connected to the pressure reducer pipeline to monitor the pressure and flow inside the pipeline. The display screen is connected to the control circuit for data display and command control.

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

[0010] Further limiting the above scheme, the liquid oxygen inlet and outlet valve pipelines include 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, a left liquid oxygen outlet pipeline, a left cryogenic solenoid valve, and a left cryogenic manual stop valve, the left liquid oxygen inlet pipeline is connected to the liquid outlet of a Dewar flask, the left liquid oxygen outlet pipeline is connected to the liquid inlet of the vaporizer, the left cryogenic solenoid valve and the left cryogenic manual stop valve The right liquid oxygen inlet and outlet valve pipeline comprises a right liquid oxygen inlet pipeline, a right liquid oxygen outlet pipeline, a right cryogenic solenoid valve, and a right cryogenic manual stop valve. The right liquid oxygen inlet pipeline is connected to the liquid outlet of another Dewar flask, and the right liquid oxygen outlet pipeline is connected to the liquid inlet of the vaporizer. The right cryogenic solenoid valve and the right cryogenic manual stop valve are connected in parallel between the right liquid oxygen inlet pipeline and the right liquid oxygen outlet pipeline.

[0011] To further limit the above scheme, the pressure reducer 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 one-way valve, a right Dewar flask pressure relief interface and a right Dewar flask pressure relief pipeline, a right pressure relief pipeline one-way valve, a six-way pipeline, a pressure relief valve interface, a pressure gauge I interface, a first-level pressure reducing valve with a pressure gauge before and after pressure reduction, a four-way pipeline, a pressure gauge II interface, a gas pressure sensor interface, a main valve inside the pipeline box, a flow meter, and a main valve outside the pipeline box.

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

[0013] To further limit the above scheme, the control circuit includes a single-chip microcomputer and peripheral circuits, the control circuit is connected to two floor scales through RS-485 serial interface 1 and RS-485 serial interface 2 to collect and transmit the weight data of the Dewar flask, the control circuit is connected to the flow meter through RS-485 serial interface 4 to collect and transmit data, the control circuit is connected to the gas pressure sensor through the A / D interface to collect and transmit data, the control circuit is connected to the left cryogenic solenoid valve and the right cryogenic solenoid valve through the left and right cryogenic solenoid valve control circuits to transmit the solenoid valve control signals, the control circuit is connected to the display screen through the universal serial port to transmit display data, and an altitude sensor is also provided inside the control circuit.

[0014] A further limitation of the above scheme also includes a remote control terminal, wherein the control circuit is connected to the 4G module via the RS-485 serial interface 3, the 4G module is arranged 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] To further limit the above scheme, the oxygen inhalation user terminal is provided with a two-stage pressure reducing valve, the oxygen inhalation user terminal has a built-in micro solenoid valve and a control circuit, the control circuit includes a 4G module chip and a SIM card, and communicates with the remote control terminal through the Internet. The oxygen inhalation 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 inhalation user terminal is displayed on the LCD screen of the oxygen inhalation user terminal.

[0016] To further limit the above solution, an oxygen concentration alarm is provided inside the oxygen source box and is used to monitor the oxygen concentration inside the oxygen source box, and an explosion-proof fan is provided outside the oxygen source box and is used to discharge high-concentration oxygen out of the box.

[0017] As a further limitation of the above scheme, an electrostatic discharger is provided outside the oxygen source box, and a fire extinguisher box is provided outside the oxygen source box.

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

[0019] The advantages of the present invention compared with the prior art are:

[0020] 1. This solution adopts liquid oxygen supply. Compared with the existing oxygen concentrator oxygen supply, the purity and quality of oxygen reach medical grade, which greatly improves the oxygen quality of users, especially for people with cor pulmonale, which will greatly improve the quality of life and prolong life;

[0021] 2. This solution uses liquid oxygen to supply oxygen. Compared with the existing oxygen concentrator oxygen supply method, the user's oxygen cost is greatly reduced, making it possible for people in high-altitude hypoxic areas to use oxygen on a daily basis;

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

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

[0024] 5. The technologies of each subsystem of this solution are mature, easy to mass produce and control costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0027] Figure 3 It is a schematic diagram of the left liquid oxygen inlet and outlet valve pipeline in a distributed liquid oxygen source oxygen supply system of the present invention;

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

[0029] Figure 5 It is a main schematic diagram of a pressure reducer pipeline in a distributed liquid oxygen source oxygen supply system of the present invention;

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

[0031] Figure 7 This is a block diagram of the gas circuit and electrical control principles of a distributed liquid oxygen source oxygen supply system of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0034] See also Figure 1-7 , describe the embodiments of the present invention in detail.

[0035] Example: See Figure 1 and 2 As shown, a distributed liquid oxygen source oxygen supply system includes an oxygen source box 1 and an oxygen inhalation user terminal, wherein the oxygen source box 1 is a protective facility for other functional units of the system to ensure that the oxygen source can be used normally in an outdoor environment.

[0036] Two dewar bottles 2 filled with liquid oxygen, an instrument and pipeline box 3, a vaporizer 4, and two floor scales 5 are arranged inside the oxygen source box 1; the two dewar bottles 2 are connected to the vaporizer 4 through the liquid oxygen inlet and outlet valve pipelines inside the instrument and pipeline box 3, and the vaporizer 4 is connected to the outdoor pipeline through the pressure reducer pipeline inside the instrument and pipeline box 3, and the outdoor pipeline is connected to each oxygen inhalation user terminal; the two floor scales 5 are respectively arranged at the lower part of the two dewar bottles 2.

[0037] In one specific embodiment: see Figure 1 As shown, the instrument and pipeline box 3 is arranged in the middle front position inside the oxygen source box 1, the two dewar bottles 2 are arranged inside the oxygen source box 1 and placed on the left and right sides of the instrument and pipeline box 3, and the gasifier 4 is arranged at the rear of the instrument and pipeline box 3. The left and right floor scales 5 are installed in the left and right floor scale pits at the bottom of the oxygen source box 1, and the weighing surface of the floor scale 5 is flush with the ground inside the oxygen source box 1, so that the dewar bottle can be pushed onto the floor scale for weight monitoring.

[0038] In a specific embodiment: a control circuit 41, a display screen 42, liquid oxygen inlet and outlet valve pipelines, and a pressure reducer pipeline are provided inside the box body and on the panel of the instrument and pipeline box 3. The control circuit 41 is connected to the floor 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 pipelines to perform switch control on them, the control circuit 41 is connected to the pressure reducer pipeline to monitor the pressure and flow inside the pipeline, and 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 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 stop valve 17. The left liquid oxygen inlet pipeline 11 is connected to the liquid outlet of a Dewar flask 2, the left liquid oxygen outlet pipeline 12 is connected to the liquid inlet of the vaporizer 4, and the left cryogenic solenoid valve 15 and the left cryogenic manual stop valve 17 are connected in parallel to the left liquid oxygen inlet pipeline 11. between the liquid inlet pipeline 11 and the left liquid oxygen outlet pipeline 12; the right liquid oxygen inlet and outlet valve pipeline includes a right liquid oxygen inlet pipeline 14, a right liquid oxygen outlet pipeline 13, a right cryogenic solenoid valve 16, and a right cryogenic manual stop valve 18. The right liquid oxygen inlet pipeline 14 is connected to the liquid outlet of another Dewar flask 2, the right liquid oxygen outlet pipeline 13 is connected to the liquid inlet of the vaporizer 4, and the right cryogenic solenoid valve 16 and the right cryogenic manual stop valve 18 are connected in parallel between the right liquid oxygen inlet pipeline 14 and the right liquid oxygen outlet pipeline 13. The left and right cryogenic solenoid valves are connected in parallel with the left and right cryogenic manual stop valves, respectively. When the cryogenic solenoid valve fails, the cryogenic manual stop valve is opened for emergency use.

[0040] Among them, see Figure 5 and 6 As shown, the pressure reducer 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 one-way valve 26, a right Dewar flask pressure relief interface 21 and a right Dewar flask pressure relief pipeline 24, a right pressure relief pipeline one-way valve 27, a six-way pipeline 25 (composed of a four-way 1 and a four-way 2), a pressure relief valve interface 28, a pressure gauge I interface 29, a first-level pressure reducing valve 30 with pressure gauges before and after pressure reduction, a four-way pipeline 31, a pressure gauge II interface 32, a gas pressure sensor interface 33, a pipeline box internal main valve 34, a flow meter 35, and a pipeline box external main valve 36. The above components are connected in series to form a pressure reducer pipeline of a liquid oxygen source oxygen supply system.

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

[0042] The oxygen in the distributed liquid oxygen source oxygen supply system is depressurized in a two-stage depressurization mode before decompression. The first stage is when the pressure of the gasified oxygen in the Dewar flask exceeds the depressurization pressure of the Dewar flask, the oxygen passes through the dewar flask pressure relief port, the one-way valve, and the four-way 1 in the six-way pipeline and enters the gasified oxygen main pipeline. The second stage of pressure relief is when the pressure of the gasified oxygen main pipeline is greater than the pressure of the main pipeline pressure relief valve, and the oxygen is discharged to the outside of the pipeline by the pressure relief valve.

[0043] Among them, see Figure 7 As shown, the control circuit 41 includes a single-chip microcomputer and peripheral circuits. The control circuit 41 is connected to two floor scales 5 through RS-485 serial interface 1 and RS-485 serial interface 2 to collect and transmit the weight data of the Dewar flask. The control circuit 41 is connected to the flow meter 35 through RS-485 serial interface 4 to collect and transmit data. The control circuit 41 is connected to the gas pressure sensor 40 through the A / D interface to collect and transmit data. The control circuit 41 is connected to the left cryogenic solenoid valve 15 and the right cryogenic solenoid valve 16 through the left and right cryogenic solenoid valve control circuits to transmit control signals. The control circuit 41 is connected to the display screen 42 through a universal serial port to transmit display data. The display screen uses a liquid crystal screen. An altitude sensor is also provided inside the control circuit 41.

[0044] In a 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 arranged inside the instrument and pipeline box 3, the remote control terminal communicates with the 4G module 43 through the Internet, and the remote control terminal communicates with the oxygen inhalation user terminal through the Internet.

[0045] The oxygen inhalation user terminal is provided with a secondary pressure reducing valve. The secondary pressure reducing valve and the oxygen inhalation user terminal are installed indoors in homes, guesthouses, hotels, offices, etc., connected to a distributed liquid oxygen source through an outdoor oxygen pipeline, and supplying oxygen to the user through the oxygen outlet on the terminal. The oxygen inhalation user terminal has a built-in micro solenoid valve and a control circuit. The control circuit includes a 4G module chip and a sim card, and can communicate with a remote control terminal through the Internet. The oxygen inhalation 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 inhalation user terminal is displayed on the LCD screen of the oxygen inhalation user terminal.

[0046] In addition, the upper panel of the instrument and pipeline box 3 is respectively provided with left and right liquid oxygen inlet and outlet pipelines, pressure reducing valve pipelines, liquid oxygen outlets and pressure relief ports of the left and right Dewar flasks, and left and right liquid oxygen inlets and gas outlets of the vaporizer, a total of 7 pipeline joints and pressure-resistant hoses, which are convenient for connecting with the pipelines of the Dewar flask and the vaporizer.

[0047] A pointer pressure gauge for measuring oxygen pressure before and after the first-stage decompression is installed on the left side of the front panel of the instrument and pipeline box 3. A control box for the liquid oxygen source of the distributed liquid oxygen source oxygen supply system is installed on the right side of the front panel of the instrument and pipeline box 3. The control box consists of an LCD screen and a control circuit board on the panel, as well as a panel and a back cover with switches and indicator lights.

[0048] The control box on the liquid oxygen source instrument and pipeline box panel has two external connectors, which are connected to the AC / DC power module, left and right floor scales, left and right cryogenic solenoid valves, 4G module, flow meter, and gas pressure sensor in the distribution box through cables to complete the power supply, reception and transmission of weight, flow, pressure and other signals, on-off control of the cryogenic solenoid valve, and display of corresponding information.

[0049] In the above structure, the control circuit, the left and right floor scales, 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 oxygen supply system.

[0050] The functions of the control circuit are:

[0051] 1) Receive the weight data of the Dewar flasks on the left and right floor scales through the RS-485 serial interface, and after processing by the single-chip microcomputer, send the weight data of the left and right Dewar flasks and the percentage data of the remaining oxygen in the left and right Dewar flasks to the LCD screen, which will be displayed on the LCD screen;

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

[0053] 3) Through the A / D interface, the analog quantity of oxygen pressure in the main pipeline after the primary pressure reducing valve has reduced pressure, which is received from the gas pressure sensor, is converted into digital oxygen flow data of the flow meter, and sent to the LCD screen for display;

[0054] 4) Processing the altitude data and temperature data sensed by the altitude sensor on the control circuit board, and sending them to the LCD screen to display the altitude and temperature data;

[0055] 5) Receive the left and right cryogenic solenoid valve control commands sent by the LCD screen, process them through the single-chip microcomputer, and send out left and right cryogenic solenoid valve control signals, which are then driven by the left and right cryogenic solenoid valve drive circuits to turn the left and right cryogenic solenoid valves on and off;

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

[0057] 7) receiving the left and right Dewar flask number data set on the LCD screen and storing them in the memory;

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

[0059] 9) Receive the left and right cryogenic solenoid valve control commands sent by the 4G module through the RS-485 serial interface, process them through the single-chip microcomputer, and send out the left and right cryogenic solenoid valve control signals, and the left and right cryogenic solenoid valve drive circuits drive the left and right cryogenic solenoid valves to be turned on and off;

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

[0061] The functions of the LCD screen are:

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

[0063] 2) Through the inductive touch screen, the human-computer interaction function is realized, and the liquid oxygen source number setting, the left and right Dewar flask number setting, and the on-off control operation of the left and right low-temperature solenoid valves are realized, and sent to the control circuit for processing.

[0064] The functions of the 4G module are:

[0065] 1) Receive the weight data of the left and right dewar bottles, oxygen flow data, liquid oxygen source number data, left and right dewar bottle number data, altitude and temperature data sent by the control circuit board through the RS-485 serial interface, and send these data to the remote control terminal (personal computer or mobile phone) via the antenna and the Internet;

[0066] 2) Receive the left and right cryogenic solenoid valve control commands sent by the remote control terminal (personal computer or mobile phone), and send these commands to the control circuit through the RS-485 interface;

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

[0068] In one specific embodiment: see Figure 1 , 2 As shown, an oxygen concentration alarm 6 is provided on the right side of the oxygen source box 1 and is used to monitor the oxygen concentration inside the oxygen source box 1. An explosion-proof fan 9 is provided outside the oxygen source box 1 and is used to discharge high-concentration oxygen out of the box. When the oxygen concentration discharged 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 work and discharge the high-concentration oxygen out of the box.

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

[0070] A fire extinguisher box 8 is provided on the right side of the exterior of the oxygen source box 1. The fire extinguisher box 8 has two fire extinguishers built therein for easy use in case of fire.

[0071] An explosion-proof distribution box 7 is provided on the right side of the oxygen source box 1, and the distribution box 7 is connected to the power conversion circuit in the control circuit 41 through an AC / DC power module 44. An external 220V / 50Hz AC power can be connected to power the liquid oxygen source. The distribution box also has a built-in AC to DC power module to provide the required DC24V DC power supply for the oxygen source control box. The distribution box also has a wiring socket for powering the oxygen concentration alarm 6 and the explosion-proof fan 9, which supplies power to the oxygen concentration alarm 6 and the explosion-proof fan 9.

[0072] The control principle of the present invention is: a distributed liquid oxygen source oxygen supply system, which uses two dewar bottles for storing liquid oxygen, and the usage mode is "one in use and one in standby", that is, one dewar bottle is in "in use" state and the other is in "standby" state.

[0073] Two dewar flasks containing liquid oxygen are placed on the left and right floor scales respectively. The floor scales monitor the weight of the two dewar flasks and send the weight data of the two dewar flasks to the control circuit. The single-chip microcomputer on the control circuit determines whether the liquid oxygen in the two dewar flasks has been consumed.

[0074] When the distributed liquid oxygen source oxygen supply system is working, the cryogenic solenoid valve of the liquid oxygen inlet and outlet pipeline on the "in-use" Dewar flask is in the "open" state, and the liquid oxygen enters the vaporizer through the pipeline for vaporization, and then after two-stage decompression, it is sent to the user through the pipeline. At this time, the cryogenic solenoid valve of the liquid oxygen inlet and outlet pipeline on the "standby" Dewar flask is in the "closed" state, and the liquid oxygen cannot enter the vaporizer through the pipeline.

[0075] When the liquid oxygen in the "in-use" Dewar flask is exhausted, the single-chip microcomputer on the control circuit detects the weight of the Dewar flask that has been depleted of liquid oxygen at this time, and controls the low-temperature solenoid valve of the pipeline on this side to close. At the same time, it opens the low-temperature solenoid valve of the pipeline on the "spare" side, allowing the liquid oxygen in the "spare" Dewar flask to enter the vaporizer, realizing the switch from "spare" to "in-use" and ensuring the continuous output of oxygen.

[0076] The single-chip microcomputer in the control circuit, while controlling the switching of the left and right cryogenic solenoid valves, also sends the weight and number data of the dewar flask that has run out of liquid oxygen to the remote control terminal through the 4G module and the Internet, reminding the oxygen supplier to replace the dewar flask that has run out of liquid oxygen in time.

[0077] The cryogenic solenoid valve used in the distributed liquid oxygen source oxygen supply system is a normally closed solenoid valve. When the cryogenic solenoid valve fails, the left and right cryogenic manual stop valves can be opened manually to use the liquid oxygen source oxygen supply system in an emergency.

[0078] The gasified oxygen reaches the oxygen inhalation user terminal in the user's room through the pipeline. When the user has paid, he only needs to press the oxygen inhalation switch of the remote control of the user terminal to inhale oxygen from the oxygen outlet of the user terminal. When the user owes fees, he only needs to scan the QR code on the LCD screen with his mobile phone, and after paying, he can inhale oxygen from the oxygen outlet of the user terminal.

[0079] The use principle of the present invention is as follows: when supplying oxygen, the left or right liquid oxygen inlet and outlet pipeline solenoid valve can be connected by operating on the LCD screen of the liquid oxygen source control box or on a mobile phone APP to supply oxygen.

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

[0081] When the user has paid, he only needs to press the oxygen inhalation switch on the remote control of the user terminal to inhale oxygen from the terminal's oxygen outlet. When the user owes fees, he only needs to scan the QR code on the LCD screen with his mobile phone, and after paying, he can inhale oxygen from the terminal's oxygen outlet.

[0082] In summary, the present invention adopts a "one in use and one in reserve" dual-dewar flask liquid oxygen supply method. Liquid oxygen is gasified by a gasifier and reduced in pressure by a pressure reducer, and then output to users through pipelines. In order to ensure continuous and uninterrupted oxygen supply, in the liquid oxygen source oxygen supply system, two floor scales are used to weigh the weights of the two dewar flasks respectively, and the weight data is sent to the single-chip microcomputer of the control circuit to determine whether the liquid oxygen in the dewar flask is exhausted, and the electromagnetic valves of the "in use" and "standby" dewar flask liquid oxygen output pipelines are driven to switch on and off, so as to realize the switching of the "in use" and "standby" dewar flask liquid oxygen output; at the same time, the control circuit sends the weight data to the 4G module, and then the 4G module uploads it to the remote control terminal through the wireless network, reminding to replace the dewar flask with exhausted liquid oxygen in time, so as to ensure that the liquid oxygen source can supply oxygen for a long time, continuously and uninterruptedly, and finally realize the formation of a distributed oxygen supply network in the vast oxygen-deficient areas, and meet the needs of people in the oxygen-deficient areas for high-quality and low-cost oxygen.

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

[0084] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0085] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A distributed liquid oxygen source oxygen supply system, characterized in that: The distributed liquid oxygen source oxygen supply system comprises an oxygen source box (1) and an oxygen inhalation user terminal. The oxygen source box (1) is provided with two dewar bottles (2) filled with liquid oxygen, an instrument and pipeline box (3), a vaporizer (4), and two floor scales (5). The two dewar bottles (2) are connected to the vaporizer (4) via liquid oxygen inlet and outlet valve pipelines inside the instrument and pipeline box (3). The vaporizer (4) is connected to an outdoor pipeline via a pressure reducer pipeline inside the instrument and pipeline box (3). The outdoor pipeline is connected to each oxygen inhalation user terminal. The two floor scales (5) are respectively arranged at the lower part of the two dewar bottles (2). A control circuit (41), a display screen (42), a liquid oxygen inlet and outlet valve pipeline, and a pressure reducer pipeline are arranged inside and on the panel of the instrument and pipeline box (3). The control circuit (41) is connected to the floor 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 switch. The control circuit (41) is connected to the pressure reducer pipeline to monitor the pressure and flow inside the pipeline. The display screen (42) is connected to the control circuit (41) for data display and command control.

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

3. A distributed liquid oxygen source oxygen supply system according to claim 1, characterized in that: The liquid oxygen inlet and outlet valve pipelines include 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 stop valve (17); the left liquid oxygen inlet pipeline (11) is connected to the liquid outlet of a Dewar flask (2); the left liquid oxygen outlet pipeline (12) is connected to the liquid inlet of a vaporizer (4); the left cryogenic solenoid valve (15) and the left cryogenic manual stop valve (17) are connected in parallel to the left liquid oxygen inlet pipeline (11). 1) and the left liquid oxygen outlet pipeline (12); the right liquid oxygen inlet and outlet valve pipeline comprises a right liquid oxygen inlet pipeline (14), a right liquid oxygen outlet pipeline (13), a right cryogenic solenoid valve (16), and a right cryogenic manual stop valve (18); the right liquid oxygen inlet pipeline (14) is connected to the liquid outlet of another Dewar flask (2); the right liquid oxygen outlet pipeline (13) is connected to the liquid inlet of the vaporizer (4); the right cryogenic solenoid valve (16) and the right cryogenic manual stop valve (18) are connected in parallel between the right liquid oxygen inlet pipeline (14) and the right liquid oxygen outlet pipeline (13).

4. A distributed liquid oxygen source oxygen supply system according to claim 3, characterized in that: The pressure reducer pipeline comprises 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 one-way valve (26), a right Dewar flask pressure relief interface (21) and a right Dewar flask pressure relief pipeline (24), a right pressure relief pipeline one-way valve (27), a six-way pipeline (25), a pressure relief valve interface (28), a pressure gauge I interface (29), a first-level pressure reducing valve (30) with pressure gauges before and after pressure reduction, a four-way pipeline (31), a pressure gauge II interface (32), a gas pressure sensor interface (33), a pipeline box internal main valve (34), a flow meter (35), and a pipeline box external main valve (36); One end of the vaporizer oxygen pipeline (23) is connected to the gas outlet of the vaporizer (4) through the vaporizer oxygen interface (20), one end of the left Dewar flask pressure relief pipeline (22) is connected to the pressure relief port on one Dewar flask (2) through the left Dewar flask pressure relief interface (19), and one end of the right Dewar flask pressure relief pipeline (24) is connected to the pressure relief port on the other Dewar flask (2) through the right Dewar flask pressure relief interface (21). 3) the other end is connected to the first interface on the six-way pipeline (25); the other end of the left Dewar flask pressure relief pipeline (22) is connected to the second interface on the six-way pipeline (25) through the left pressure relief pipeline one-way valve (26); the other end of the right Dewar flask pressure relief pipeline (24) is connected to the third interface on the six-way pipeline (25) through the right pressure relief pipeline one-way valve (27); the fourth interface on the six-way pipeline (25) is a pressure relief valve interface (28) and is connected to the pressure relief valve (29); The invention relates to a pressure reducing valve (37), a fifth interface on the six-way pipeline (25) is a pressure gauge I interface (29) and is connected to a pressure gauge I (38), a sixth interface on the six-way pipeline (25) is connected to the inlet of a first-stage pressure reducing valve (30), an outlet of the first-stage pressure reducing valve (30) is connected to the first interface of a four-way pipeline (31), a second interface on the four-way pipeline (31) is a pressure gauge II interface (32) and is connected to a pressure gauge II (39), a third interface on the four-way pipeline (31) is a gas pressure sensor interface (33) and is connected to a gas pressure sensor (40), a fourth interface on the four-way pipeline (31) is connected to the inlet of a main valve (34) inside the pipeline box, an outlet of the main valve (34) inside the pipeline box is connected to the inlet of a flow meter (35), an outlet of the flow meter (35) is connected to the inlet of a main valve (36) outside the pipeline box, and an outlet of the main valve (36) outside the pipeline box is connected to an outdoor pipeline.

5. A distributed liquid oxygen source oxygen supply system according to claim 4, characterized in that: The control circuit (41) comprises a single chip microcomputer and peripheral circuits. The control circuit (41) is connected to two floor scales (5) via an RS-485 serial interface 1 and an RS-485 serial interface 2 to collect and transmit Dewar flask weight data. The control circuit (41) is connected to a flow meter (35) via an 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 cryogenic solenoid valve (15) and a right cryogenic solenoid valve (16) via left and right cryogenic solenoid valve control circuits 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. An altitude sensor is also provided inside the control circuit (41).

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

7. A distributed liquid oxygen source oxygen supply system according to claim 6, characterized in that: The oxygen inhalation user terminal is provided with a secondary pressure reducing valve. The oxygen inhalation user terminal has a built-in micro solenoid valve and a control circuit. The control circuit includes a 4G module chip and a SIM card. It communicates with the remote control terminal through the Internet. The oxygen inhalation 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 inhalation user terminal is displayed on the LCD screen of the oxygen inhalation user terminal.

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

9. A distributed liquid oxygen source oxygen supply system according to claim 1, characterized in that: An electrostatic discharger (10) is provided outside the oxygen source box (1), and a fire extinguisher box (8) is provided outside the oxygen source box (1).

10. A distributed liquid oxygen source oxygen supply system according to claim 1, characterized in that: A distribution box (7) is provided outside the oxygen source box (1), and the 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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