Medical compressed air supply system and control method thereof

Abstract

The invention discloses a medical compressed air supply system and a control method thereof. The medical compressed air supply system comprises a central control module, and an air compressor, a wet air storage tank, an air inlet filter, a drying machine, an air outlet filter, a dry air storage tank and an air utilization equipment pipe network which are sequentially connected through pipelines, a dry air storage tank is further arranged between the air outlet filter and the air utilization equipment pipe network; an air inlet pipe of the air inlet filter is provided with an electric ball valve, the wet air storage tank and the dry air storage tank are respectively provided with a pressure sensor, and a dew point detector is arranged between the dry air storage tank and the air utilization equipment pipe network; and the central control module is in electric control connection with the air compressor, the electric ball valve, the pressure sensor and the dew point detector. The buffer capacity of the whole gas supply system is improved, meanwhile, the working mode of the whole gas supply system can be more flexibly controlled, and energy conservation and consumption reduction are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical equipment, and particularly relates to a medical compressed air post-treatment module, a gas supply system and a control method thereof. Background Art

[0002] At present, medium-sized and above hospitals all adopt the form of centralized medical air compression to provide medical compressed gas to operating rooms, wards and other departments that need to use medical air. The existing medical compressed air supply system includes an air compressor (abbreviated as air compressor), a wet air storage tank, an inlet air filter, a dryer, an outlet air filter, etc. connected in sequence through pipelines. The compressed dry air (CDA) output by the medical compressed air supply system is finally supplied to the gas-using equipment in various wards such as operating rooms, emergency rooms, and treatment rooms for medical use.

[0003] However, in the prior art, the control during the use of the medical compressed air supply system is not fine enough, resulting in obvious resource waste and unnecessary energy loss. Summary of the Invention

[0004] The first object of the present invention is to provide a medical compressed air post-treatment module, a gas supply system and a control method thereof, aiming to reduce the resource waste and energy loss of the medical compressed air supply system. The first object of the present invention adopts the following technical solutions: A medical compressed air supply system includes a central control module and an air compressor, a wet air storage tank, an inlet air filter, a dryer, an outlet air filter, a dry air storage tank, and a gas-using equipment pipeline network connected in sequence through pipelines; characterized in that a dry air storage tank is further provided between the outlet air filter and the gas-using equipment pipeline network; an electric ball valve is provided on the inlet pipe of the inlet air filter, pressure sensors are respectively provided on the wet air storage tank and the dry air storage tank, and a dew point detector is provided between the dry air storage tank and the gas-using equipment pipeline network; the central control module is electrically connected to the air compressor, the electric ball valve, the pressure sensors and the dew point detector.

[0005] As a preferred technical solution, the dryer is an electrically controlled opening and closing adsorption dryer, which is electrically connected to the central control module; or, the dryer is a normally open adsorption dryer.

[0006] As a preferred technical solution, the medical compressed air supply system further includes a mobile base, the dryer and the central control module are fixedly arranged on both sides above the mobile base, and the inlet air filter and the outlet air filter are mounted between the dryer and the central control module.

[0007] As a preferred technical solution, the medical compressed air supply system further includes a pressure reducing valve disposed on the outlet pipe of the outlet air filter; the intake air filter, the dryer, the outlet air filter, and the pressure reducing valve are two sets with one in use and one in reserve.

[0008] As a preferred technical solution, the medical compressed air supply system further includes a collection box, and the dew point detector is disposed in the collection box.

[0009] As a preferred technical solution, an output pressure sensor is further disposed in the collection box, and the output pressure sensor is electrically connected to the central control module.

[0010] As a preferred technical solution, a CO concentration sensor is further disposed in the collection box, and the CO concentration sensor is electrically connected to the central control module.

[0011] A control method for the medical compressed air supply system described above, characterized by comprising: (1) The central control module receives a start-up operation command or has started to execute automatic operation before power-off, and the medical compressed air supply system starts to operate automatically; (2) The central control module monitors the feedback signal of the pressure sensor of the air storage tank in real time. When the pressure of the wet air storage tank is lower than the set lower limit, the central control module controls the electric ball valve to open, and then controls the air compressor to start; (3) The central control module monitors the feedback signal of the pressure sensor of the dry air storage tank and the feedback signal of the dew point detector in real time. After processing, calculating and analyzing, it determines to perform the action of continuing to operate or stopping.

[0012] As a preferred technical solution, step (3) specifically includes: When the dryer is an electrically controlled opening and closing adsorption dryer: when the central control module monitors that the pressure of the air storage tank is higher than the set upper limit, the central control module controls the started air compressor to stop, and then closes the electric ball valve to prevent the pipeline gas from flowing into the dryer; When the dryer is a constantly started adsorption dryer: the central control module judges whether the feedback signal of the dew point detector is within the set value range. If the dew point value is within the set value range, it controls the dryer not to work. If the dew point value is higher than the set value range and the air compressor is running, it controls the dryer to work again.

[0013] The medical compressed air supply system and its control method provided by the above solution further include a dry air storage tank disposed between the outlet filter and the gas-using equipment pipeline network, which improves the buffering capacity of the entire supply system. By providing an electric ball valve on the inlet pipe of the inlet filter, pressure sensors on the wet air storage tank and the dry air storage tank respectively, and a dew point detector between the dry air storage tank and the gas-using equipment pipeline network, the working mode of the entire supply system can be controlled more flexibly, saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention, the drawings required for use in the description of the embodiments or the prior art will be briefly described below.

[0015] Figure 1 FIG. is a schematic diagram of the composition of the medical compressed air supply system provided by the embodiment of the present invention.

[0016] Figure 2 FIG. is a perspective view of the medical compressed air post-treatment module provided by the embodiment of the present invention.

[0017] Figure 3 FIG. is a side view of the medical compressed air post-treatment module provided by the embodiment of the present invention.

[0018] Figure 4 FIG. is a control schematic diagram of the medical compressed air supply system provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical solution of the present invention clearer and the technical advantages more obvious, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope disclosed by the present invention.

[0020] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings. For the convenience of description, the present invention defines the orientation in combination with the accompanying drawings. These definitions of orientation are only for clearly describing the relative positional relationship and are not used to limit the actual orientation of the product or device during production, use, sales, etc. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Furthermore, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See Figure 1 and Figure 2 As shown, this embodiment also provides a medical compressed air supply system, including: a medical compressed air post-treatment module 100, an air compressor 200, a wet air storage tank 300, a dry air storage tank 400, and a gas-using equipment pipeline network 500; the output end of the air compressor 200 is connected to the wet air storage tank 300 through a pipeline, the intake pipe 30 of the medical compressed air post-treatment module 100 is docked with the output end of the wet air storage tank 300, the input end of the dry air storage tank 400 is connected to the outlet pipe 80 of the medical compressed air post-treatment module 100, and the output end of the dry air storage tank 400 is used to directly or indirectly dock with the gas-using equipment pipeline network 500.

[0022] Combined with Figure 2 and Figure 3 As shown, the medical compressed air post-treatment module 100 includes a mobile base 10, a central control module 20, an intake pipe 30, a first intake air filter 41, a first dryer 51, a first outlet air filter 61, a first pressure reducing valve 71, and an outlet pipe 80; the intake pipe 30, the first intake air filter 41, the first dryer 51, the first outlet air filter 61, the first pressure reducing valve 71, and the outlet pipe 80 are sequentially connected through pipelines.

[0023] The medical compressed air post-processing module 100 provided in this embodiment also includes a second air intake filter 42, a second dryer 52, a second air outlet filter 62, and a second pressure reducing valve 72. The second air intake filter 42, the second dryer 52, the second air outlet filter 62, and the second pressure reducing valve 72 are connected in sequence through pipelines, and the input end of the second air intake filter 42 is also connected to the air intake pipe 30, and the output end of the second pressure reducing valve 72 is also connected to the air outlet pipe 80; that is, in this embodiment, two groups of air intake filters, dryers, air outlet filters and pressure reducing valves are arranged between the air intake pipe 30 and the air outlet pipe 80, and the first group is configured as the main use, and the second group is configured as the backup.

[0024] In this embodiment, the first dryer 51 and the second dryer 52 are fixedly arranged on one side above the mobile base 10, the central control module 20 is fixedly arranged on the other side above the mobile base 10, and the air inlet pipe 30, the air outlet pipe 80 and two sets of air inlet filters, air outlet filters, and the pressure reducing valve are mounted between the two dryers and the central control module 20. In this embodiment, the two dryers are adsorption dryers (abbreviated as adsorption dryers). Among them, the central control module 20 is electrically connected to the two dryers and the two pressure reducing valves.

[0025] The medical compressed air post-processing module 100 provided in the above embodiment forms a highly integrated medical compressed air post-processing module by centrally arranging the air inlet pipe, air inlet filter, dryer, air outlet filter, pressure reducing valve, air outlet pipe and central control module on a mobile base. The centralized assembly of these components can be completed at the factory end. When transported to the site, the entire module is also easy to move. The on-site assembly can be completed by simply connecting the air inlet pipe to the wet air storage tank downstream of the on-site air compressor and connecting the air outlet pipe to the pipeline network of the gas-using equipment. Moreover, the connecting pipelines and control lines are relatively centralized and the pipelines used are shorter, which saves costs.

[0026] Continue to see Figure 1 In this embodiment, the buffering capacity is improved by adding a dry air storage tank 400. Figure 2 and Figure 3 As shown, the medical compressed air post-processing module 100 provided in this embodiment further includes an electric ball valve 90, which is arranged on the air inlet pipe 30, and the central control module 20 is electrically connected to the electric ball valve 90. By adding the electric ball valve 90 to the air inlet pipe 30, it is convenient to control the working mode of the medical compressed air post-processing module 100 as a whole.

[0027] Continue to see Figure 1, in this embodiment, pressure sensors are also respectively arranged on the wet air storage tank 300 and the dry air storage tank 400, and a dew point detector is arranged between the dry air storage tank 400 and the gas-using equipment pipeline network 500, which is electrically connected to the central control module. This enables the working mode of the entire gas supply system to be controlled more flexibly, saving energy and reducing consumption. And it enables the working modes of the air compressor 200 and the medical compressed air post-treatment module 100 to be controlled more flexibly, saving energy and reducing consumption.

[0028] Continue to refer to Figure 1 , the medical compressed air supply system provided in this embodiment further includes a collection box 600. The collection box 600 is provided with the dew point detector, an output pressure sensor and a CO concentration sensor. The dew point detector, the output pressure sensor and the CO concentration sensor are respectively electrically connected to the central control module; the output end of the dry air storage tank 400 is docked with the gas-using equipment pipeline network after passing through the collection box 600, so as to perform dew point detector, output pressure detection and CO concentration detection in the collection box 600. For the medical compressed air supply system provided by the above solution, by adding a collection box and a storage tank pressure sensor, real-time data such as output pressure, CO concentration, dew point, and storage tank pressure are obtained, and the signals are fed back to the central control for further auxiliary control and early warning monitoring.

[0029] Based on the medical compressed air supply system described above, this embodiment further provides a control method for it, including: (1) The central control module receives a start-up operation command or has started to execute automatic operation before power-off, and the medical compressed air supply system starts to operate automatically; (2) The central control module monitors the feedback signals of the pressure sensors of each air storage tank in real time. When the pressure of the wet air storage tank is lower than the set lower limit, the central control module controls the electric ball valve to open, and then controls the air compressor to start; (3) The central control module monitors the feedback signals of the pressure sensors of the dry air storage tank and the feedback signals of the dew point detector in real time. After processing, calculating and analyzing, it determines to execute the action of continuing to run or stopping.

[0030] Step (3) specifically includes: When the dryer is an electrically controlled on-off adsorption dryer: when the central control module monitors that the pressure of the air storage tank is higher than the set upper limit, the central control module controls the started air compressor to stop, and then closes the electric ball valve so that the pipeline gas no longer flows into the dryer; When the dryer is a constantly-on adsorption dryer: the central control module judges whether the feedback signal of the dew point detector is within the set value range. If the dew point value is within the set value range, it controls the dryer not to work. If the dew point value is higher than the set value range and the air compressor is running, it controls the dryer to work again.

[0031] Combined Figure 4 As shown, a specific example of the control process of the medical compressed air supply system provided by the above embodiment is as follows: 1. After the central control module (hereinafter referred to as the central control) passes the power-on self-check and meets the automatic operation conditions, when it receives the start operation command or has started to execute automatic operation before power-off, the automatic operation starts after the delay reaches; 2. After the automatic operation starts, when the air storage tank pressure (the signal is collected and fed back by the storage tank pressure sensor) is lower than the set lower limit, the central control executes to output and control the electric ball valve 90 on the intake pipe 30 to open; after the delay reaches, it controls the air compressor to start and the adsorption dryer (hereinafter referred to as the dryer) to start; 3. The compressed gas discharged from the air compressor is stored and cooled in the wet air storage tank 300, then flows into the dryer through the pipeline. After the dryer adsorbs and processes it, it becomes dry gas and flows into the dry air storage tank 400 for storage. After being sampled by the storage tank pressure sensor, it is fed back to the central control to display the real-time pressure; 4. When the air pressure is higher than the set upper limit, the central control controls the started air compressor to stop. After the delay reaches, the central control closes the electric ball valve 90 to prevent the pipeline gas from flowing into the dryer; 5. The dried air is output to the distribution cylinder after being stepped down by the pressure regulating module. In the output pipeline, real-time data such as output pressure, CO concentration, and dew point are sampled by the rear-end acquisition box 600, and the signal is fed back to the central control; 6. The central control determines to execute actions of running, stopping, or alarming after processing, calculating, and analyzing the signals fed back by each sensor.

[0032] Among them, the dew point energy-saving control includes the following two key points: Key point 1: For some models of dryers that cannot be controlled by the central control: Due to the working characteristic of the dryer being a periodic cyclic regeneration characteristic, a relative volume of gas will be discharged in each regeneration cycle. The larger the gas volume processed by the dryer, the more exhaust gas will be discharged. When the backend users do not use gas, use less gas, or the air compressor stops for rest, the dryer is still regenerating and exhausting gas, which will inevitably cause waste of the gas volume stored in the front-end wet air storage tank 300. When the pressure of the wet air storage tank 300 drops to the set lower limit, the air compressor will be started again to ensure the stored gas volume. At this time, the air compressor will work more or continuously, thus increasing the waste of electric energy and the maintenance cost of the air compressor; Therefore, in this embodiment, an electric ball valve 90 is added at the front end of the dryer, that is, between the dryer and the wet air storage tank 300. A dry air storage tank 400 is arranged at the rear end of the dryer, and a pressure sensor is arranged on the dry air storage tank 400. The start and stop of the air compressor are determined according to the pressure range of the dry air storage tank 400. When the gas consumption at the rear end is small, and the gas storage pressure in the dry tank is within the set range, the air compressor can be stopped to rest, and the electric ball valve 90 is closed. The gas stored in the front-end wet air storage tank 300 will not be wasted, achieving the purpose of energy saving.

[0033] Point 2: For the models of the dryer that can be controlled by the central control: The key element is to collect the signal feedback by the dew point detector. According to the dew point signal, after processing and calculation, the central control analyzes whether it is within the set value range. If it is within the set value range, the dryer will not work. If the dew point value is higher than the set range and the air compressor is running, the dryer will work again, thus achieving the purpose of energy saving.

[0034] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A medical compressed air supply system, comprising a central control module and an air compressor, a wet air storage tank, an air inlet filter, a dryer, an air outlet filter, a dry air storage tank, and a gas equipment pipeline network connected in sequence through pipelines; characterized in that: A dry air storage tank is also provided between the air outlet filter and the gas-using equipment pipeline network; an electric ball valve is provided on the air inlet pipe of the air inlet filter, pressure sensors are respectively provided on the wet air storage tank and the dry air storage tank, and a dew point detector is provided between the dry air storage tank and the gas-using equipment pipeline network; the central control module is electrically connected to the air compressor, the electric ball valve, the pressure sensor and the dew point detector.

2. The medical compressed air post-processing module according to claim 1, characterized in that: The dryer is an adsorption dryer of electrically controlled opening and closing type, and is electrically connected to the central control module; or, the dryer is an adsorption dryer of normally open type.

3. The medical compressed air supply system according to claim 1, characterized in that: It also includes a mobile base, the dryer and the central control module are fixedly arranged on both sides above the mobile base, and the air inlet filter and the air outlet filter are mounted between the dryer and the central control module.

4. The medical compressed air supply system according to claim 2, characterized in that: It also includes a pressure reducing valve arranged on the air outlet pipe of the air outlet filter; the air inlet filter, the dryer, the air outlet filter and the pressure reducing valve are two groups, one for use and one for backup.

5. The medical compressed air supply system according to claim 1, characterized in that: The medical compressed air supply system also includes a collection box, and the dew point detector is arranged in the collection box.

6. The medical compressed air supply system according to claim 5, characterized in that: An output pressure sensor is also provided in the collection box, and the output pressure sensor is electrically connected to the central control module.

7. The medical compressed air supply system according to claim 6, characterized in that: A CO concentration sensor is also provided in the collection box, and the CO concentration sensor is electrically connected to the central control module.

8. A control method for a medical compressed air supply system, wherein the medical compressed air supply system adopts the medical compressed air supply system according to claim 2; characterized in that: include: (1) The central control module receives a start-up command or starts automatic operation before power failure, and the medical compressed air supply system starts automatic operation; (2) The central control module monitors the feedback signal of the pressure sensor of the air storage tank in real time. When the pressure of the wet air storage tank is lower than the set lower limit, the central control module controls the electric ball valve to open, and then controls the air compressor to start; (3) The central control module monitors the feedback signal of the pressure sensor of the dry air storage tank and the feedback signal of the dew point detector in real time, and after processing, calculation and analysis, determines whether to continue operation or stop.

9. The control method of the medical compressed air supply system according to claim 8, characterized in that: Step (3) specifically includes: When the dryer is an adsorption dryer with electric control on and off: when the central control module detects that the pressure of the air storage tank is higher than the set upper limit, the central control module controls the started air compressor to stop, and then closes the electric ball valve to prevent the pipeline gas from flowing into the dryer; When the dryer is a normally-on adsorption dryer: the central control module determines whether the feedback signal of the dew point detector is within a set value range. If the dew point value is within the set value range, the dryer is controlled not to work; if the dew point value is higher than the value setting range and the air compressor is running, the dryer is controlled to work again.

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