Distributed liquid oxygen source oxygen supply device for continuous oxygen supply
Through distributed liquid oxygen source oxygen supply devices, combined with sensor sensing and Internet technology, continuous supply of high-purity oxygen is achieved, solving the shortage of oxygen supply from oxygen concentrators, reducing costs and improving the reliability and popularity of oxygen supply.
Patent Information
- Application Number
- CN202422268252.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The existing oxygen supply method of oxygen concentrators has problems such as low oxygen purity, easy equipment failure, high energy consumption and high cost in oxygen-deficient areas on the plateau. It is difficult to achieve long-term continuous oxygen supply, and there is also the problem of uninterrupted output of liquid oxygen without human intervention.
A distributed liquid oxygen source oxygen supply device is used, combined with sensor sensing, electronic control and Internet technology, to achieve continuous supply of liquid oxygen through a vaporizer and a pressure reducer. A double Dewar flask design is adopted, and a floor scale is used to monitor the weight to switch between spare and in-use bottles, achieving automatic switching. Combined with 4G module remote control, continuous oxygen supply is ensured.
It realizes the continuous supply of high-purity medical-grade oxygen, reduces the cost of oxygen use, improves the quality of life, is suitable for universal oxygen supply in plateau hypoxic areas, and is easy to mass produce and control costs.
Smart Images
Figure CN223360421U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of oxygen supply, and in particular relates to a distributed liquid oxygen source oxygen supply device for continuous oxygen supply, which is used for supplying oxygen to plateau hypoxic areas and other areas or occasions requiring oxygen supply. Background Art
[0002] With the development of society, people in oxygen-deficient areas of the plateau have an increasingly urgent need for oxygen supply. Currently, oxygen concentrators are the primary oxygen supply method in these areas. However, these oxygen concentrators have inherent drawbacks. First, they use molecular sieve filtration, resulting in low oxygen purity (typically around 93%) and inability to completely filter out some harmful gases. Second, the molecular sieves are prone to failure and malfunction over extended periods of continuous operation, impacting long-term oxygen supply. Third, the high energy consumption and high cost of using oxygen concentrators make their widespread adoption difficult in these areas, severely restricting the development of oxygen supply in these areas.
[0003] Medical-grade liquid oxygen (typically with a purity of >99.5%) is a low-cost, high-quality oxygen source and is undoubtedly the best choice for those requiring oxygen. However, ensuring uninterrupted and continuous oxygen delivery without human intervention has long been a challenge in effectively supplying liquid oxygen.
[0004] The present utility model is aimed at this problem, and combines sensor sensing technology, electronic control technology, Internet technology with liquid oxygen gasification, pressure reduction and transportation technology, thus effectively solving the problem of continuous supply of liquid oxygen from the technical point of view and the technical approach of commercial realization. Utility Model Content
[0005] The technical problem solved by the present invention is to provide a distributed liquid oxygen source oxygen supply device for continuous oxygen supply. In response to the problems of the existing technology, the present invention provides a new distributed liquid oxygen source oxygen supply device, so that residents' homes, hotels, offices, or other oxygen-demanding people in high-altitude oxygen-deficient areas can use low-cost, high-quality medical-grade oxygen continuously for a long time.
[0006] In order to achieve the above purpose, the technical solution adopted by this utility model is:
[0007] A distributed liquid oxygen source oxygen supply device for continuous oxygen supply, the distributed liquid oxygen source oxygen supply system includes an oxygen source box, 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 bottom of the two dewar bottles.
[0008] To further limit the above solution, the instrument and pipeline box is arranged in the middle of the oxygen source box, the two Dewar flasks are arranged inside the oxygen source box and on both sides of the instrument and pipeline box, and the vaporizer is arranged at the rear of the instrument and pipeline box.
[0009] Further limiting the above solution, 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 are connected. 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 pipeline includes 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.
[0010] 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 pre- and post-pressure gauges for 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.
[0011] 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.
[0012] 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.
[0013] As a further limitation of the above solution, an electrostatic discharger is provided outside the oxygen source box, and a fire extinguisher box is provided outside the oxygen source box.
[0014] 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.
[0015] The advantages of this utility model compared with the prior art are:
[0016] 1. This solution uses liquid oxygen as the oxygen supply method. Compared with the existing oxygen concentrator oxygen supply method, 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;
[0017] 2. This solution uses liquid oxygen as the oxygen supply method. 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 oxygen-deficient areas to use oxygen on a daily basis;
[0018] 3. This solution can be combined with 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;
[0019] 4. The technology of each subsystem of this solution is mature, easy to mass produce and control costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the appearance of a distributed liquid oxygen source oxygen supply system of this utility model Figure 1 ;
[0021] Figure 2 This is a schematic diagram of the appearance of a distributed liquid oxygen source oxygen supply system of this utility model Figure 2 ;
[0022] Figure 3 This 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 utility model;
[0023] Figure 4 This is a schematic diagram of the right liquid oxygen inlet and outlet pipelines in a distributed liquid oxygen source oxygen supply system of the utility model;
[0024] Figure 5 This is a main schematic diagram of a pressure reducer pipeline in a distributed liquid oxygen source oxygen supply system of the utility model;
[0025] Figure 6 This is a top view schematic diagram of the pressure reducer pipeline in a distributed liquid oxygen source oxygen supply system of the utility model
[0026] 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 utility model. DETAILED DESCRIPTION
[0027] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0028] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
[0029] See also Figure 1-7 , describe the embodiments of the present utility model in detail.
[0030] Example: See Figure 1 and 2 As shown, a distributed liquid oxygen source oxygen supply device for continuous oxygen supply is used. The distributed liquid oxygen source oxygen supply system includes an oxygen source box 1, 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.
[0031] Two dewar bottles 2 filled with liquid oxygen, an instrument and pipeline box 3, a vaporizer 4, and two floor scales 5 are provided 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 provided at the lower part of the two dewar bottles 2.
[0032] In one embodiment: See Figure 1 As shown, the instrument and pipeline box 3 is located in the center front of the oxygen source box 1. The two dewar flasks 2 are located inside the oxygen source box 1 and are placed 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 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. The weighing surfaces of the floor scales 5 are flush with the floor surface of the oxygen source box 1, making it easy to push the dewar flasks onto the floor scales for weight monitoring.
[0033] Among them, see Figure 3 and 4As shown, 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 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. 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, and 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. 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.
[0034] 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 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 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 its own 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 main valve 34 inside the pipeline box, a flow meter 35, and a main valve 36 outside the pipeline box. The above components are connected in series to form the pressure reducer pipeline of the liquid oxygen source oxygen supply system.
[0035] 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, 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. 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.
[0036] This distributed liquid oxygen source oxygen supply system uses a two-stage pressure relief method before decompression. The first stage involves the oxygen in the dewar flask exceeding the dewar flask's pressure relief pressure. The oxygen then passes through the dewar flask's pressure relief port, a one-way valve, and four-way port 1 in the six-way pipeline, entering the main vaporized oxygen pipeline. The second stage of pressure relief occurs when the pressure in the main vaporized oxygen pipeline exceeds the pressure of the main pipeline pressure relief valve, at which point the oxygen is discharged out of the pipeline.
[0037] In actual operation, a control circuit 41 and a display screen 42 can be set inside the box 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 on-off control, 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.
[0038] For details, see Figure 7As 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 Dewar flask weight data. 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 an LCD screen. An altitude sensor is also provided inside the control circuit 41.
[0039] In a specific embodiment: a remote control terminal may also be included, the control circuit 41 is connected to the 4G module 43 via 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 via the Internet, and the remote control terminal communicates with the oxygen inhalation user terminal via the Internet.
[0040] The oxygen inhalation user terminal is equipped with a two-stage pressure reducing valve. The two-stage pressure reducing valve and the oxygen inhalation user terminal are installed indoors in homes, guesthouses, hotels, offices, and other places. The terminal is connected to a distributed liquid oxygen source via an outdoor oxygen pipeline and supplies oxygen to the user through an 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 via 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. A QR code for user payment is displayed on the LCD screen of the oxygen inhalation user terminal.
[0041] In addition, the upper panel of the instrument and pipeline box 3 is respectively provided with 7 pipeline joints and pressure-resistant hoses, including the left and right liquid oxygen inlet and outlet pipelines, the pressure reducing valve pipelines, the liquid oxygen outlet and pressure relief ports of the left and right Dewar flasks, and the left and right liquid oxygen inlet and gas outlet of the vaporizer, which are convenient for connecting the pipelines with the Dewar flask and the vaporizer.
[0042] Mounted on the left side of the front panel of instrument and piping box 3 is a pointer-type pressure gauge for measuring oxygen pressure before and after the first stage of decompression. Mounted on the right side of the front panel is the control box for the distributed liquid oxygen supply system's liquid oxygen source. The control box consists of an LCD screen and control circuit board on the front panel, as well as a front panel with switches and indicator lights and a rear cover.
[0043] 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, completing functions such as 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.
[0044] 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.
[0045] The functions of the control circuit are:
[0046] 1) Receive the weight data of the Dewar flasks on the left and right floor scales through the RS-485 serial interface, process it through the single-chip microcomputer, and send the weight data of the left and right Dewar flasks and the percentage of residual oxygen in the left and right Dewar flasks to the LCD screen for display;
[0047] 2) Receive oxygen flow data from the flow meter through the RS-485 serial interface and send it to the LCD screen for display;
[0048] 3) Through the A / D interface, the analog value of the oxygen pressure in the main pipeline after the pressure reduction by the first-stage pressure reducing valve, which is 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;
[0049] 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 for display;
[0050] 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 the left and right cryogenic solenoid valve control signals. The left and right cryogenic solenoid valve drive circuits drive the left and right cryogenic solenoid valves to be on and off;
[0051] 6) Receive the liquid oxygen source number data set on the LCD screen and store it in the memory;
[0052] 7) Receive the left and right Dewar flask number data set on the LCD screen and store them in the memory;
[0053] 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;
[0054] 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. The left and right cryogenic solenoid valve drive circuits drive the left and right cryogenic solenoid valves to be on and off;
[0055] 10) Receive the liquid oxygen source number data and the left and right Dewar flask number data sent by the 4G module through the RS-485 serial interface, and send them to the LCD screen for display.
[0056] The functions of the LCD screen are:
[0057] 1) Receive the weight data of the left and right Dewar flasks, the residual oxygen percentage data, the oxygen flow data, the liquid oxygen source number data, the left and right Dewar flask number data, the altitude and temperature data sent by the control circuit, and display them in the form of "graph + number";
[0058] 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.
[0059] The functions of the 4G module are:
[0060] 1) Receive 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 sent by the control circuit board through the RS-485 serial interface, and send this data to the remote control terminal (personal computer or mobile phone) via the antenna and the Internet;
[0061] 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;
[0062] 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.
[0063] In one embodiment: See Figure 1 、 2 As shown, an oxygen concentration alarm 6 is installed on the right side of the oxygen source box 1 to monitor the oxygen concentration inside the box 1. An explosion-proof fan 9 is installed outside the box 1 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 operate and discharge the high-concentration oxygen out of the box.
[0064] The oxygen source box 1 is provided with an electrostatic discharger 10 on the outside. The electrostatic discharger 10 is hung on the left side of 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 oxygen source use.
[0065] 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 contains two fire extinguishers for easy use in case of fire.
[0066] An explosion-proof distribution box 7 is located on the right side of the oxygen source housing 1. This box is connected to the power conversion circuitry within the control circuit 41 via an AC / DC power module 44. This box can be connected to an external 220V / 50Hz AC source to power the liquid oxygen source. The box also includes a built-in AC-to-DC power module to provide the 24V DC power required by the oxygen source control box. The box also houses power connectors for the oxygen concentration alarm 6 and explosion-proof fan 9.
[0067] The control principle of the utility model is: a distributed liquid oxygen source oxygen supply system adopts two Dewar bottles for storing liquid oxygen, which are used in a "one in use and one in standby" manner, that is, one Dewar bottle is in "in use" state and the other is in "standby" state.
[0068] Two dewar bottles containing liquid oxygen are placed on the left and right floor scales respectively. The floor scales monitor the weight of the two dewar bottles and send the weight data of the two dewar bottles to the control circuit. The single chip microcomputer on the control circuit determines whether the liquid oxygen in the two dewar bottles has been consumed.
[0069] When the distributed liquid oxygen source oxygen supply system is operating, the cryogenic solenoid valve on the liquid oxygen inlet and outlet pipeline on the "active" Dewar flask is in the "open" state. Liquid oxygen enters the vaporizer through the pipeline for vaporization, and then, after two-stage decompression, is delivered to users through the pipeline. At this time, the cryogenic solenoid valve on the liquid oxygen inlet and outlet pipeline on the "standby" Dewar flask is in the "closed" state, and liquid oxygen cannot enter the vaporizer through the pipeline.
[0070] 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, controls the low-temperature solenoid valve of the pipeline on this side to close, and at the same time, 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.
[0071] 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 serial 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.
[0072] The cryogenic solenoid valve used in the distributed liquid oxygen source oxygen supply system is a normally closed solenoid valve. 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 source oxygen supply system.
[0073] The vaporized oxygen is piped to the user's indoor oxygen inhalation terminal. If the user has paid, they simply press the oxygen inhalation switch on the remote control to inhale oxygen from the terminal's oxygen outlet. If the user is in arrears, they simply scan the QR code on the LCD screen with their phone. After payment, they can inhale oxygen from the terminal's oxygen outlet.
[0074] The operating principle of the utility model is: when supplying oxygen, you can operate on the LCD screen of the liquid oxygen source control box or the mobile phone APP to connect the left or right liquid oxygen inlet and outlet pipeline solenoid valve to supply oxygen.
[0075] 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 supply oxygen to the user through the oxygen outlet on the user terminal.
[0076] When the user has paid, they only need 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 is in arrears, they only need to scan the QR code on the LCD screen with their mobile phone, pay the fee, and then inhale oxygen from the terminal's oxygen outlet.
[0077] In summary, the present invention adopts a "one in use and one in standby" dual-dewar flask liquid oxygen supply method. Liquid oxygen is vaporized by a vaporizer and reduced in pressure by a pressure reducer, and then output to the user through a pipeline. 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 solenoid valves of the liquid oxygen output pipelines of the "in use" and "standby" dewar flasks are driven on and off to realize the switching of the liquid oxygen output of the "in use" and "standby" dewar flasks; 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 the user to replace the dewar flask with exhausted liquid oxygen in time 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 the people in the oxygen-deficient areas for high-quality and low-cost oxygen.
[0078] Among them, the control program involved in this distributed liquid oxygen source oxygen supply system has obtained a computer program software copyright certificate, so the control program in this utility model belongs to the existing technology.
[0079] 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 present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0080] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 methods that can be understood by those skilled in the art.
Claims
1. A distributed liquid oxygen source oxygen supply device for continuous oxygen supply, characterized in that: The distributed liquid oxygen source oxygen supply system comprises an oxygen source box (1), wherein 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) 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); and the outdoor pipeline is connected to each oxygen inhalation user; the two floor scales (5) are respectively arranged at the lower parts of the two dewar bottles (2).
2. The distributed liquid oxygen source oxygen supply device for continuous oxygen supply 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. The distributed liquid oxygen source oxygen supply device for continuous oxygen supply 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 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).
4. The distributed liquid oxygen source oxygen supply device for continuous oxygen supply according to claim 3, characterized in that: 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), 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), and the fourth interface on the six-way pipeline (25) is a pressure relief valve interface (28) and is connected to the pressure relief valve. The invention relates to a pressure relief 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 relief valve (30), an outlet of the first-stage pressure relief 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. The distributed liquid oxygen source oxygen supply device for continuous oxygen supply 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.
6. The distributed liquid oxygen source oxygen supply device for continuous oxygen supply 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).
7. The distributed liquid oxygen source oxygen supply device for continuous oxygen supply 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).