Medical dual-gas source gas supply system and medical gas supply system

Abstract

The utility model provides a kind of medical double gas source gas supply system and medical gas supply system, it is related to medical equipment technical field, and wherein medical double gas source gas supply system includes air compressor, external gas source input interface, gas output main pipe, first pressure switch and first check valve;External gas source input interface is sequentially communicated to gas output main pipe by first pressure switch and first check valve;The air outlet of air compressor is communicated with the outlet end of first check valve at the confluence node, and is jointly accessed gas output main pipe;The opening direction of first check valve is set as by first pressure switch pointing to gas output main pipe;When the external gas source pressure detected by first pressure switch is less than or equal to set threshold value, start air compressor;When the external gas source pressure detected by first pressure switch is greater than set threshold value, close air compressor.Effectively guarantee the stable gas supply of medical equipment, improve the safety and reliability of medical process.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and more specifically, to a medical dual-gas-source supply system and a medical gas supply system. Background Technology

[0002] In modern healthcare systems, medical gas supply systems are critical infrastructure ensuring the normal operation of medical equipment. Their stability and reliability play a decisive role in the safe use of key medical equipment such as ventilators and anesthesia machines. In actual clinical applications, to ensure continuous gas supply, a central gas supply system (external gas source) and a backup air compressor are usually connected simultaneously to cope with possible sudden gas pressure shortages.

[0003] In related technologies, pressure sensors are used to monitor the pressure of the external gas source. When the detected pressure is lower than a set threshold, a solenoid valve switches to compressor gas supply mode. While this method achieves basic gas source switching, there is an unavoidable risk of momentary interruption or significant drop in gas supply pressure during the switching process. Specifically, from the disconnection of the external gas source to the start-up of the backup compressor, the establishment of stable pressure, and the completion of the circuit switching, there is a brief but significant time window (i.e., the pressure drop window). During this window, the output pressure of the entire system will experience a significant momentary drop or even a brief interruption. This is extremely dangerous for precision medical equipment (such as ventilators and anesthesia machines) that relies on highly stable and continuous gas sources. Such momentary fluctuations or interruptions in gas supply pressure can lead to malfunctions and parameter alarms in medical equipment, or even directly interrupt the effective ventilation or anesthetic gas supply to patients, seriously threatening their lives. The consequences are unimaginable, especially in critical scenarios such as critical care and surgical anesthesia. Utility Model Content

[0004] The problem this invention addresses is: how to solve the technical problem of instantaneous interruption or significant drop in gas supply pressure during the gas source switching process in existing medical dual-gas supply systems.

[0005] To address the aforementioned problems, this utility model provides a medical dual-gas supply system, comprising an air compressor, an external gas source input interface, a gas output main pipe, a first pressure switch, and a first one-way valve. The external gas source input interface is sequentially connected to the gas output main pipe via the first pressure switch and the first one-way valve. The outlet of the air compressor and the outlet of the first one-way valve are connected at a junction node and jointly connected to the gas output main pipe. The opening direction of the first one-way valve is set from the first pressure switch to the gas output main pipe. When the external gas source pressure detected by the first pressure switch is less than or equal to a set threshold, the air compressor is started; when the external gas source pressure detected by the first pressure switch is greater than the set threshold, the air compressor is shut down.

[0006] Optionally, it also includes a second one-way valve, which is disposed between the air outlet of the air compressor and the manifold, and the opening direction of the second one-way valve is set from the air compressor to the gas output main pipe.

[0007] Optionally, the first pressure switch is a normally closed pressure switch, which is set with a first pressure threshold P1 and a second pressure threshold P2, and P1>P2; when the external air source pressure detected by the first pressure switch at the external air source input interface is ≥P1, the first pressure switch closes and the air compressor stops; when the external air source pressure detected by the first pressure switch at the external air source input interface is ≤P2, the first pressure switch opens and the air compressor starts.

[0008] Optionally, the first pressure threshold is set to 90%-95% of the rated working pressure of the external air source, and the second pressure threshold is set to 70%-80% of the rated working pressure of the external air source.

[0009] Optionally, the outlet end of the gas output manifold is configured as a medical quick connector for connecting to the gas input port of a ventilator or anesthesia machine.

[0010] Optionally, it also includes a pressure reducing valve, which is disposed between the gas output main pipe and the manifold node, for adjusting the manifold gas pressure to a preset output pressure.

[0011] Optionally, it also includes a second pressure switch, which is connected to the pressure reducing valve and is used to monitor the final output pressure after adjustment by the pressure reducing valve.

[0012] Optionally, the system also includes a drain filter, which is disposed between the pressure reducing valve and the gas output main pipe, and the drain end of the drain filter is connected to the condensate output pipe.

[0013] Optionally, it also includes a control unit, which is connected to both the air compressor and the first pressure switch. The control unit includes a time-delay relay module configured to:

[0014] When the pressure detected by the first pressure switch is greater than or equal to the first pressure threshold P1 and remains stable for a predetermined delay time, the air compressor is controlled to shut down.

[0015] When the pressure detected by the first pressure switch is less than the second pressure threshold P2, the air compressor is immediately started.

[0016] This utility model's medical dual-gas-source supply system ensures normal gas supply from the external gas source when the external gas source pressure is normal. When the external gas source pressure falls below a set threshold, an air compressor is activated. The air compressor and the external gas source work together at the junction to supply gas to the main gas output pipe. This avoids the instantaneous interruption or significant drop in pressure caused by completely cutting off the external gas source during the switching process, greatly shortening the pressure drop window period and potentially achieving seamless switching. This improves the continuity and stability of the gas supply, ensuring a stable gas supply for medical equipment and guaranteeing its safe operation. Especially in critical scenarios such as critical care and surgical anesthesia, it can reduce medical risks and improve the success rate of patient treatment.

[0017] This utility model also provides a medical gas supply system, including the aforementioned medical dual-gas-source supply system; the external gas source input interface is connected to the air outlet of the hospital's central gas supply system via a medical gas pipeline. It possesses the beneficial effects of the aforementioned medical dual-gas-source supply system compared to the prior art, which will not be elaborated here. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Air compressor; 2. External air source input interface; 3. Gas output main pipe; 4. First pressure switch; 5. First check valve; 6. Manifold; 7. Second check valve; 8. Pressure reducing valve; 9. Second pressure switch; 10. Drain filter. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0022] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0023] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0024] like Figure 1 As shown in the figure, a medical dual-gas supply system provided by this utility model includes an air compressor 1, an external gas source input interface 2, a gas output main pipe 3, a first pressure switch 4, and a first one-way valve 5. The external gas source input interface 2 is connected to the gas output main pipe 3 through the first pressure switch 4 and the first one-way valve 5 in sequence. The outlet of the air compressor 1 and the outlet of the first one-way valve 5 are connected at the confluence node 6 and are connected to the gas output main pipe 3 together. The opening direction of the first one-way valve 5 is set to point from the first pressure switch 4 to the gas output main pipe 3. When the external gas source pressure detected by the first pressure switch 4 is less than or equal to a set threshold, the air compressor 1 is started. When the external gas source pressure detected by the first pressure switch 4 is greater than the set threshold, the air compressor 1 is turned off.

[0025] Specifically, the medical dual-source gas supply system of this embodiment includes a normal gas supply phase and a gas source switching phase. Normal gas supply phase: An external gas source is connected to the system through the external gas source input interface 2. The gas passes sequentially through the first pressure switch 4 and the first one-way valve 5 before entering the gas output main pipe 3 to supply gas to the medical equipment. At this time, because the external gas source pressure is greater than the set threshold, the first pressure switch 4 will not trigger the start of the air compressor 1, and the air compressor 1 is in a closed state. Furthermore, the opening direction of the first one-way valve 5 is from the first pressure switch 4 to the gas output main pipe 3, ensuring that gas can only flow unidirectionally from the external gas source to the gas output main pipe 3, preventing gas backflow. Gas source switching phase: When the first pressure switch 4 detects that the external gas source pressure is less than or equal to the set threshold, it indicates that the external gas source has insufficient supply pressure. At this time, the first pressure switch 4 triggers the start of the air compressor 1. The air compressor 1 begins to work, and the gas discharged from its outlet merges with any remaining external gas at the confluence node 6, and then both enter the gas output main pipe 3 to continue supplying gas to the medical equipment. When the external air source pressure detected by the first pressure switch 4 is greater than the set threshold again, it indicates that the external air source has returned to normal supply pressure. The first pressure switch 4 triggers the shutdown of the air compressor 1, and the system returns to the normal state of being supplied only by the external air source.

[0026] In this embodiment, the air compressor 1 is activated only when the external gas source pressure is less than or equal to a set threshold. The outlet of the air compressor 1 and the outlet of the first one-way valve 5 are connected at the junction node 6 and then jointly connected to the gas output main pipe 3. Thus, as the external gas source pressure decreases, the air compressor 1 gradually starts and builds up pressure, supplying gas to the medical equipment together with the remaining external gas source gas. This avoids instantaneous interruptions or significant drops in gas supply pressure during gas source switching, ensuring the stability and continuity of the gas supply to the medical equipment. Furthermore, by setting the first one-way valve 5, and ensuring its opening direction is from the first pressure switch 4 to the gas output main pipe 3, it effectively prevents gas from flowing back from the gas output main pipe 3 to the external gas source, guaranteeing the unidirectional and stable nature of the system's gas supply, further ensuring that the medical equipment can continuously receive a stable gas supply.

[0027] Optionally, such as Figure 1 As shown, it also includes a second one-way valve 7, which is located between the air outlet of the air compressor 1 and the manifold 6. The opening direction of the second one-way valve 7 is set from the air compressor 1 to the gas output main pipe 3.

[0028] Specifically, when the external gas source pressure is normal (greater than the set threshold), air compressor 1 is in the off state. At this time, due to the presence of the second one-way valve 7, gas is prevented from flowing back to air compressor 1 from the manifold 6 or the gas output main 3, avoiding unnecessary pressure or interference to the off air compressor 1. When the first pressure switch 4 detects that the external gas source pressure is less than or equal to the set threshold, it starts air compressor 1. Air compressor 1 begins to work and produces gas, which flows out from the outlet of air compressor 1. Because the opening direction of the second one-way valve 7 is set from air compressor 1 to the gas output main 3, the gas can only flow unidirectionally through the second one-way valve 7 to the manifold 6, then merges with the remaining external gas source gas at the manifold 6, and then jointly enters the gas output main 3 to supply gas to the medical equipment. When the external gas source pressure returns to normal (greater than the set threshold), the first pressure switch 4 shuts down air compressor 1. At this time, the second one-way valve 7 continues to prevent gas from flowing back to the now-stopped air compressor 1.

[0029] In this optional embodiment, the original first one-way valve 5 mainly prevents backflow of gas from the external gas source direction, while the added second one-way valve 7 is specifically for the air compressor 1 outlet direction. This effectively prevents gas from flowing back from the gas output manifold 3 or the junction node 6 to the air compressor 1 when the air compressor 1 stops working or when the system pressure changes. This avoids damage to the air compressor 1 due to gas backflow, extends its service life, and ensures the one-way and stable nature of the system's gas supply, guaranteeing a stable gas source for medical equipment. Furthermore, the second one-way valve 7 effectively isolates and controls the backup gas source generated by the air compressor 1 from other parts of the system. When the air compressor 1 is working, it ensures that the gas it produces can smoothly enter the system's gas supply path; when the air compressor 1 is not working, it prevents interference from other gases in the system, making the backup gas source (the gas generated by the air compressor 1) more independent and reliable. When the backup gas source needs to be activated, it can be quickly and stably put into use, improving the reliability and stability of the entire medical dual-gas supply system.

[0030] Optionally, the first pressure switch 4 is a normally closed pressure switch, which is set with a first pressure threshold P1 and a second pressure threshold P2, where P1>P2; when the external air source pressure detected by the first pressure switch 4 at the external air source input interface 2 is ≥P1, the first pressure switch 4 closes and the air compressor 1 stops; when the external air source pressure detected by the first pressure switch 4 at the external air source input interface 2 is ≤P2, the first pressure switch 4 opens and the air compressor 1 starts.

[0031] Specifically, when the system starts operating, an external air source enters the system through the external air source input interface 2. The first pressure switch 4 continuously monitors the external air source pressure at the input interface 2 in real time. If the detected pressure is greater than or equal to the first pressure threshold P1, it indicates that the external air source pressure is sufficient to meet the air requirements of the medical equipment. At this time, the normally closed first pressure switch 4 closes because the pressure has reached the set value. The closed switch sends a signal, which is transmitted to the control circuit of the air compressor 1, causing the air compressor 1 to stop, avoiding unnecessary operation and saving energy. As the system continues to operate, if there are unstable external air source supplies, causing the external air source pressure to drop, when the external air source pressure detected by the first pressure switch 4 is less than or equal to the second pressure threshold P2, the external air source pressure is no longer sufficient to stably supply air to the medical equipment. At this time, the normally closed first pressure switch 4 opens because the pressure is lower than the set value. The opened switch also sends a signal, which is transmitted to the control circuit of the air compressor 1, triggering the air compressor 1 to start. The air compressor 1 begins to work and produce gas as a backup gas source to supply gas to the medical equipment, ensuring that the medical equipment can continuously obtain a stable gas supply.

[0032] In this optional embodiment, by setting two different pressure thresholds P1 and P2, the start and stop of the air compressor 1 can be controlled more precisely according to the changes in the external air source pressure compared to the control method with a single threshold. When the external air source pressure fluctuates within the normal range but has not yet affected the stability of the air supply, the air compressor 1 will not start and stop frequently, reducing equipment wear and energy waste; the air compressor 1 will only be started when the external air source pressure drops to a critical value (P2) that may affect the normal operation of the medical equipment, ensuring the stability and reliability of the air supply.

[0033] Optionally, the first pressure threshold is set to 90%-95% of the rated working pressure of the external air source, and the second pressure threshold is set to 70%-80% of the rated working pressure of the external air source.

[0034] Specifically, during the normal gas supply phase: When an external gas source is connected to the system, the first pressure switch 4 monitors the pressure at the external gas source input interface 2 in real time. As long as the external gas source pressure is within 90%-100% of its rated operating pressure, that is, greater than or equal to the first pressure threshold (90%-95% of the rated operating pressure of the external gas source), the normally closed first pressure switch 4 remains closed. This closed signal is transmitted to the control circuit of the air compressor 1, causing the air compressor 1 to stop, and the system relies on the external gas source to supply gas to the medical equipment. During the pressure drop warning phase: When the external gas source pressure drops due to various reasons (such as gas pipeline leakage, sudden increase in gas consumption, etc.), when the pressure drops to 80%-90% of the rated operating pressure of the external gas source (that is, less than the first pressure threshold but greater than the second pressure threshold), although the external gas source pressure has decreased, it can still maintain the basic operation of the medical equipment. The first pressure switch 4 remains closed, and the air compressor 1 does not start, avoiding unnecessary energy consumption and frequent start-stop of the equipment. Backup gas source startup phase: If the external gas source pressure continues to drop, and when it falls to less than or equal to the second pressure threshold (70% - 80% of the rated working pressure of the external gas source), it indicates that the external gas source can no longer stably supply gas to the medical equipment. At this time, the normally closed first pressure switch 4 opens, disconnecting the signal transmitted to the control circuit of the air compressor 1, starting the air compressor 1, and allowing the gas it produces to be connected to the system as a backup gas source. This gas then merges with the remaining external gas source gas to supply gas to the medical equipment, ensuring the normal operation of the medical equipment.

[0035] In this optional embodiment, linking the pressure threshold to the rated operating pressure of the external air source allows for more precise setting of the start-up and shutdown timing of the air compressor 1 based on the actual operating capacity of the external air source. Since different specifications and models of external air sources have different rated operating pressures, setting the threshold based on the rated operating pressure allows the system to better adapt to various external air sources, ensuring that appropriate air source pressure is provided to medical equipment under different conditions, meeting the stringent requirements of medical equipment for air source stability and continuity. Furthermore, setting the first pressure threshold at 90%-95% of the rated operating pressure causes the air compressor 1 to shut down at this higher pressure level. This ensures that the external air source has sufficient pressure reserve to cope with short-term air consumption fluctuations, while also preventing the air compressor 1 from continuously operating while the external air source pressure is still sufficient to maintain equipment operation, reducing energy waste. Setting the second pressure threshold at 70%-80% of the rated operating pressure allows the air compressor 1 to start only at this relatively lower pressure level, preventing frequent start-up and shutdown of the air compressor 1 due to minor fluctuations in the external air source pressure, improving system operating efficiency, and extending the service life of the air compressor 1. Furthermore, by appropriately setting these two pressure thresholds, the system has sufficient time and a pressure buffer zone to react as the external air source pressure gradually decreases. When the external air source pressure approaches but is not yet completely unable to meet the equipment's needs, air compressor 1 is not immediately activated to prevent unnecessary switching due to misjudgment. However, when the pressure does drop to a level that may affect the normal operation of the equipment, air compressor 1 can be activated in a timely manner to ensure that the medical equipment always receives a stable air supply. This greatly enhances the safety and reliability of the entire medical dual-air source supply system and effectively protects the patient's life.

[0036] Optionally, the outlet end of the gas output manifold 3 is configured as a medical quick connector for connecting to the gas input port of a ventilator or anesthesia machine.

[0037] Specifically, the gas output manifold 3 is responsible for delivering processed and regulated gas to the gas-using equipment. When the system is operating normally, whether supplied solely by an external gas source or jointly by an external gas source and a backup gas source generated by the air compressor 1, the gas will converge in the gas output manifold 3. The outlet end of the gas output manifold 3 is specially configured with a medical quick-connect coupling. When medical equipment such as a ventilator or anesthesia machine needs to be connected to the system to obtain gas, the operator simply connects the gas input port of the ventilator or anesthesia machine to the medical quick-connect coupling at the outlet end of the gas output manifold 3. The internal connection mechanism of the quick-connect coupling (such as a snap-fit ​​and sealing ring) quickly achieves a tight connection, ensuring that gas can be stably and leak-free transmitted from the gas output manifold 3 to the gas input port of the ventilator or anesthesia machine, providing the necessary gas source for these medical devices and ensuring their normal operation. When disconnection is required, the two can be quickly and easily separated through a specific operation (such as pressing the snap-fit).

[0038] In this optional embodiment, the medical quick connector makes connecting and disconnecting the ventilator or anesthesia machine from the gas output manifold 3 extremely simple and rapid. In emergency situations such as medical first aid or surgery, time is of the essence. The quick connector can greatly shorten the equipment connection time, enabling medical equipment to be put into use as soon as possible, thus gaining valuable treatment time for the patient.

[0039] Optionally, such as Figure 1 As shown, it also includes a pressure reducing valve 8, which is located between the gas output main pipe 3 and the manifold node 6, and is used to adjust the manifold gas pressure to a preset output pressure.

[0040] Specifically, the pressure reducing valve 8 is located between the gas output main pipe 3 and the manifold 6, and its core working principle is based on force balance and fluid mechanics principles. When the gas flows from the manifold 6 to the pressure reducing valve 8, the gas pressure acts on the valve core of the pressure reducing valve 8. The pressure reducing valve 8 contains elastic elements such as springs, which generate a spring force opposite to the gas pressure. By adjusting the adjusting device (such as an adjusting screw) on the pressure reducing valve 8, the preload of the spring can be changed. When the gas pressure is high, the gas pressure overcomes the spring force and pushes the valve core to move, reducing the valve opening and thus limiting the gas flow and reducing the gas pressure. When the gas pressure decreases, the spring force pushes the valve core to move, increasing the valve opening and increasing the gas flow to maintain a stable output pressure. After adjustment by the pressure reducing valve 8, the pressure of the gas is precisely adjusted to the preset output pressure and then stably delivered to the gas output main pipe 3, providing a suitable pressure gas source for the subsequently connected medical equipment.

[0041] In this optional embodiment, different medical devices such as ventilators and anesthesia machines have strict requirements on the pressure of the input gas. Excessive gas pressure may damage the precision components of the medical device, affecting its normal operation and even threatening patient safety; while excessively low gas pressure may cause the device to malfunction, affecting treatment effectiveness. The pressure reducing valve 8 can adjust the manifold gas pressure to a preset output pressure, ensuring that the gas pressure entering the medical device is within a safe and appropriate range, thus guaranteeing the safe and stable operation of the medical device.

[0042] Optionally, such as Figure 1 As shown, it also includes a second pressure switch 9, which is connected to the pressure reducing valve 8 and is used to monitor the final output pressure after being adjusted by the pressure reducing valve 8.

[0043] Specifically, the second pressure switch 9 is located at and closely connected to the pressure reducing valve 8. The second pressure switch 9 contains a pressure sensing element that can sense the gas pressure after adjustment by the pressure reducing valve 8, i.e., the final output pressure, in real time. When the final output pressure changes, the pressure sensing element generates a corresponding electrical signal change. The second pressure switch 9 has a preset pressure threshold range, and it compares the sensed pressure signal with this threshold range. If the final output pressure exceeds or falls below the preset threshold range, the second pressure switch 9 will immediately activate, triggering the corresponding control circuit to send an alarm signal to the system or control relevant equipment (such as air compressor 1) to perform corresponding operations to ensure that the system pressure remains stable within a safe and suitable range.

[0044] In this optional embodiment, the second pressure switch 9 can monitor the final output pressure after adjustment by the pressure reducing valve 8 in real time. Compared with relying solely on the adjustment function of the pressure reducing valve 8 itself, it provides an additional layer of real-time monitoring protection, which can promptly detect any deviations that may occur during the pressure adjustment process, such as malfunction of the pressure reducing valve 8 or abnormal pressure fluctuations, ensuring that the gas source pressure received by the medical device is always under accurate monitoring.

[0045] Optionally, such as Figure 1 As shown, it also includes a drain filter 10, which is disposed between the pressure reducing valve 8 and the gas output main pipe 3, and the drain end of the drain filter 10 is connected to the condensate output pipe.

[0046] Specifically, the drain filter 10 typically contains a filtration structure and a condensate collection area. When gas passes through the drain filter 10, moisture and impurities carried in the gas are intercepted and separated by the filtration structure. During gas transport, temperature and pressure changes cause water vapor to condense into liquid water, which collects in the condensate collection area of ​​the drain filter 10. The drain filter 10 is equipped with an automatic drain device or a manual drain valve. The automatic drain device generally uses sensors such as a float to detect the condensate level; when the level reaches a certain height, the automatic drain device opens the drain channel, discharging the condensate out of the system through the connected condensate outlet pipe. The manual drain valve requires periodic inspection and manual opening by the operator for drainage. The clean gas, after filtration and drainage treatment by the drain filter 10, is then delivered to medical equipment such as ventilators and anesthesia machines through the gas outlet main pipe 3.

[0047] In this optional embodiment, moisture and impurities carried in the gas can adversely affect the normal operation of the medical device. Moisture may cause rust and corrosion of internal metal parts, affecting the device's lifespan; impurities may clog the device's air intake channels, valves, and other components, leading to device malfunction. The drain filter 10 can effectively remove moisture and impurities from the gas, providing a dry and clean gas source for the medical device, ensuring its normal operation and lifespan.

[0048] Optionally, it also includes a control unit, which is connected to the air compressor 1 and the first pressure switch 4 respectively. The control unit includes a time delay relay module and is configured to: control the air compressor 1 to shut down when the pressure detected by the first pressure switch 4 is greater than or equal to the first pressure threshold P1 and remains stable for a predetermined delay time; and immediately control the air compressor 1 to start when the pressure detected by the first pressure switch 4 is less than the second pressure threshold P2.

[0049] Specifically, in this embodiment, if the air pressure value detected by the first pressure switch 4 is greater than the first pressure threshold P1, for example, 0.28 MPa, the air compressor 1 is turned off, and air is supplied to the medical device only through an external air source. If the air pressure value detected by the first pressure switch 4 is less than the preset threshold, for example, 0.28 MPa, the air compressor 1 can be started by controlling it, and air is supplied to the gas output manifold 3 simultaneously through the air compressor 1 and the external air source, thereby providing a larger output flow for the pneumatic equipment. When the air compressor 1 is started for the first time, the air compressor 1 is in the start state, and air is supplied simultaneously by the external air source and the air compressor 1. After running for a period of time (for example, 10 minutes), the air compressor 1 can be turned off by controlling it to cut off the air supply from the air compressor 1 to the gas output manifold 3; at this time, air is supplied solely through the external air source. If the air pressure value detected by the first pressure switch 4 is lower than the preset threshold, for example, 0.28 MPa, the air compressor 1 is started by controlling it, and air is supplied simultaneously through the air compressor 1 and the external air source, avoiding a temporary shortage of gas pressure supplied to the gas output manifold 3. If the air pressure value (external air source pressure) detected by the first pressure switch 4 is greater than 0.28 MPa and continues for a period of time after running for a while (e.g., 10 minutes), it is determined that the external air source meets the requirements, and the air compressor 1 is then turned off.

[0050] In this optional embodiment, when the pressure rises to the shutdown threshold P1 (0.28MPa), the compressor is not immediately shut down. Instead, the pressure is required to stabilize at or above P1 for a predetermined period of time. This effectively filters out brief pressure fluctuations (such as pipeline disturbances or temporary changes in the demand of the gas-using equipment). The compressor is only shut down after confirming that the external gas source pressure is truly stable and sufficient. This significantly reduces unnecessary start-stop cycles, greatly extends the compressor's lifespan, and lowers maintenance costs and failure rates. Moreover, when insufficient external gas source pressure is detected (< preset threshold / P2), or during the initial system startup, the compressor starts and supplies gas simultaneously with the external gas source. The "dual gas source parallel" mode superimposes the gas supply flow of both sources, providing a larger output flow for the pneumatic medical equipment and meeting the peak demand of the equipment.

[0051] This utility model provides a medical gas supply system, including the medical dual gas source supply system as described above; the external gas source input interface 2 of the medical dual gas source supply system is connected to the outlet of the hospital central gas supply system through a medical gas pipeline.

[0052] The medical gas supply system of this embodiment has the same beneficial effects as the existing technology, and will not be repeated here.

[0053] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A medical dual-gas-source supply system, characterized in that, The system includes an air compressor (1), an external air source input interface (2), a gas output main pipe (3), a first pressure switch (4), and a first one-way valve (5). The external air source input interface (2) is connected to the gas output main pipe (3) in sequence through the first pressure switch (4) and the first one-way valve (5). The outlet of the air compressor (1) is connected to the outlet of the first one-way valve (5) at a junction node (6) and is connected to the gas output main pipe (3). The opening direction of the first one-way valve (5) is set to point from the first pressure switch (4) to the gas output main pipe (3). When the external air source pressure detected by the first pressure switch (4) is less than or equal to a set threshold, the air compressor (1) is started. When the external air source pressure detected by the first pressure switch (4) is greater than the set threshold, the air compressor (1) is turned off.

2. The medical dual-gas-source supply system according to claim 1, characterized in that, It also includes a second one-way valve (7), which is located between the air outlet of the air compressor (1) and the manifold (6). The opening direction of the second one-way valve (7) is set from the air compressor (1) to the gas output main pipe (3).

3. The medical dual-gas-source supply system according to claim 2, characterized in that, The first pressure switch (4) is a normally closed pressure switch, which is set with a first pressure threshold P1 and a second pressure threshold P2, and P1 > P2; when the external air source pressure of the external air source input interface (2) detected by the first pressure switch (4) is ≥ P1, the first pressure switch (4) closes and the air compressor (1) stops; when the external air source pressure of the external air source input interface (2) detected by the first pressure switch (4) is ≤ P2, the first pressure switch (4) opens and the air compressor (1) starts.

4. The medical dual-gas-source supply system according to claim 3, characterized in that, The first pressure threshold is set to 90%-95% of the rated working pressure of the external air source, and the second pressure threshold is set to 70%-80% of the rated working pressure of the external air source.

5. The medical dual-gas-source supply system according to claim 1, characterized in that, The outlet end of the gas output manifold (3) is configured as a medical quick connector for connecting to the gas input port of a ventilator or anesthesia machine.

6. The medical dual-gas-source supply system according to claim 1, characterized in that, It also includes a pressure reducing valve (8), which is located between the gas output main pipe (3) and the junction node (6) to adjust the gas pressure of the junction to a preset output pressure.

7. The medical dual-gas-source supply system according to claim 6, characterized in that, It also includes a second pressure switch (9), which is connected to the pressure reducing valve (8) and is used to monitor the final output pressure after being adjusted by the pressure reducing valve (8).

8. The medical dual-gas-source supply system according to claim 6, characterized in that, It also includes a drain filter (10), which is disposed between the pressure reducing valve (8) and the gas output main pipe (3), and the drain end of the drain filter (10) is connected to the condensate output pipe.

9. The medical dual-gas-source supply system according to claim 3 or 4, characterized in that, It also includes a control unit, which is connected to the air compressor (1) and the first pressure switch (4) respectively. The control unit includes a time-delay relay module and is configured to: When the pressure detected by the first pressure switch (4) is greater than or equal to the first pressure threshold P1 and remains stable for a predetermined delay time, the air compressor (1) is controlled to shut down. When the pressure detected by the first pressure switch (4) is less than the second pressure threshold P2, the air compressor (1) is immediately controlled to start.

10. A medical gas supply system, characterized in that, The system includes a medical dual-source gas supply system as described in any one of claims 1-9; the external gas source input interface (2) of the medical dual-source gas supply system is connected to the outlet of the hospital central gas supply system through a medical gas pipeline.

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