Flow-adjustable foam generator control system

Abstract

The utility model discloses a foam generator control system capable of adjusting flow. Comprising a power switch, a box body, a power adapter terminal, a PCB, a display screen, operation keys, a gas pump, an exhaust electromagnetic valve, a liquid pump, a pressure relief electromagnetic valve, a power adapter, a water flow sensor, a pressure switch, a liquid outlet pipe, a gas outlet pipeline, a fan-shaped nozzle, a gas pipeline A, a liquid pipeline D, a liquid pipeline A, a liquid pipeline B, a liquid pipeline C, a gas pipeline B, a box door, a spray gun and a switch button. A liquid pump interface, a gas pump interface, a pressure relief solenoid valve interface, an exhaust solenoid valve interface, a water flow sensor interface and a pressure switch interface. According to the utility model, different rotating speeds of the liquid pump and the gas pump can be realized by setting different parameters through the keys, so that the foam output and different control gears of the foam generator can be indirectly controlled, and the foam output of the foam generator can be more accurately and reliably controlled. And the medical staff can control the foam usage amount by presetting usage parameters.

Description

Technical Field

[0001] This utility model relates to the medical field, and in particular to a foam generator control system. Background Technology

[0002] A medical foam generator is a machine used to produce foam. It can turn an aqueous slurry containing a certain amount of humectant into foam by controlling the gas pressure and liquid flow rate, thus mixing the two liquids to form foam. The basic principle of a foam generator is to introduce gas into an aqueous foaming agent solution. In the bubble formation system, the foaming agent solution is the dispersion medium, and the gas is the dispersed phase. The gas disperses in the liquid, forming bubbles, and countless bubbles then combine to form foam. The stirring head of the medical foam generator mixes the humectant and air, forming foam at the outlet and delivering it to the application site. Currently available foam generators are mainly mechanically controlled, using throttling valves to control the gas and liquid flow rates. This is inconvenient to use and difficult to adjust, making it difficult for medical personnel to adjust the flow rate appropriately, and failing to achieve ideal results for the treatment of different instruments. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable flow rate foam generator control system. By setting buttons to adjust different parameters, different speeds of the liquid pump and gas pump can be achieved, thereby indirectly controlling the foam output of the foam generator. Different control levels allow for more precise and reliable control of the foam generator's output. Furthermore, the foam generator is convenient and easy to operate. Medical personnel can control the foam usage by preset parameters, and the display shows the current usage data. The RS485 interface on the PCB board also allows users to conveniently monitor the liquid usage of the device wirelessly, greatly improving the work efficiency of medical personnel.

[0004] This utility model includes a power switch, a housing, power adapter terminals, a PCB board, a display screen, operation buttons, a gas pump, an exhaust solenoid valve, a liquid pump, a pressure relief solenoid valve, a power adapter, a water flow sensor, a pressure switch, a liquid outlet pipe, an air outlet pipe, a fan-shaped nozzle, a gas pipe A, a liquid pipe D, a liquid pipe A, a liquid pipe B, a liquid pipe C, a gas pipe B, a door, a spray gun, a switch button, a liquid pump interface, a gas pump interface, a pressure relief solenoid valve interface, an exhaust solenoid valve interface, a water flow sensor interface, and a pressure switch interface.

[0005] The enclosure door is movably connected to the enclosure body, which has an air vent, liquid inlet, liquid outlet, and pressure relief vent at the bottom. Inside the door is a PCB board, and inside the enclosure are a pressure relief solenoid valve, water flow sensor, pressure switch, liquid pump, exhaust solenoid valve, and gas pump. The PCB board mainly includes printed circuits for the liquid pump, gas pump, display screen, operation buttons, pressure relief, exhaust, alarm, start-up, water flow sensor, and pressure switch. It also includes interfaces for the liquid pump, gas pump, pressure relief solenoid valve, exhaust solenoid valve, water flow sensor, and pressure switch. The PCB board has a 24V+ positive terminal, a 24V- negative terminal, an RS485 interface, a display screen, and operation buttons. The door has a through-hole for the display screen and five through-holes for the buttons. The display screen is positioned outside the door through this through-hole. The display screen primarily shows the foam flow rate (L / Min), total foam usage (L), speed setting (low / medium / high), pressure relief indicator, start-up indicator, and alarm indicator. The operating buttons mainly include a pressure relief button, a start button, a setting button, an up adjustment button, and a down adjustment button. These buttons are located outside the enclosure door via five button through-holes. The liquid inlet, liquid pump, pressure switch, and water flow sensor input are connected sequentially via liquid line A. One output of the water flow sensor is connected to the liquid outlet via liquid line B. The liquid outlet is connected to the spray gun via an outlet pipe. The spray gun has a switch button, and its output port is connected to the spray gun. The spray gun's output port is connected to a fan-shaped nozzle. The other output of the water flow sensor is connected to the input of the pressure relief solenoid valve via liquid line C. The output of the pressure relief solenoid valve is connected to the pressure relief port via liquid line D. One output of the gas pump is connected to the gas outlet via gas line A. The gas outlet is connected to the fan-shaped nozzle via an outlet pipe. The other output of the gas pump is connected to the exhaust solenoid valve via gas line B. The liquid and gas mix and are sprayed through the fan-shaped nozzle to form foam.

[0006] The power adapter is placed outside the enclosure. The power adapter input voltage is 220V AC, and the power adapter output voltage is 24V+ (positive) and 24V- (negative). The 24V+ output voltage is electrically connected to one positive terminal of the power adapter, and the other positive terminal is electrically connected to one end of the power switch. The other end of the power switch is electrically connected to the 24V+ positive interface of the PCB board. The 24V- output voltage is electrically connected to one negative terminal of the power adapter, and the negative terminal is electrically connected to the 24V- negative interface of the PCB board. The water flow sensor is electrically connected to its interface, the pressure switch is electrically connected to its interface, the liquid pump is electrically connected to its interface, the pressure relief solenoid valve is electrically connected to its interface, the gas pump is electrically connected to its interface, and the exhaust solenoid valve is electrically connected to its interface.

[0007] Compared with existing technologies, this invention has the following advantages: Different parameters can be adjusted via buttons to achieve different speeds of the liquid pump and gas pump, thereby indirectly controlling the foam output of the foam generator. Different control levels allow for more precise and reliable control of the foam generator's output. Furthermore, the foam generator is convenient and easy to operate. Medical personnel can control the foam usage by preset parameters, and the display shows the current usage data. The RS485 interface on the PCB board also allows users to conveniently monitor the liquid usage via wireless network, greatly improving the work efficiency of medical personnel. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a perspective view of the present invention;

[0010] Figure 2 This is the electrical circuit diagram of this utility model;

[0011] Figure 3 This is a diagram of the gas and liquid circuits of this utility model;

[0012] In the diagram, 1-Power switch, 2-Box housing, 3-Power adapter terminal, 4-PCB board, 4-1 Display screen, 4-2 Operation buttons, 4-2-1 Pressure relief button, 4-2-2 Start button, 4-2-3 Setting button, 4-2-4 Up adjustment button, 4-2-5 Down adjustment button, 5-1 Air vent, 5-2 Liquid inlet, 5-3 Liquid outlet, 5-4 Pressure relief hole, 6-Gas pump, 7-Exhaust solenoid valve, 8-Liquid pump, 9-Pressure relief solenoid valve, 10-Power adapter, 11-Water flow sensor, 12-Pressure... Force switch, 13-1 liquid outlet pipe, 13-2 gas outlet pipe, 14-fan-shaped nozzle, 15-gas pipe A, 16-liquid pipe D, 17-RS485 interface, 18-liquid pipe A, 19-liquid pipe B, 20-liquid pipe C, 21-gas pipe B, 22-box door, 23-spray gun, 24-switch button, 25-liquid pump interface, 26-gas pump interface, 27-pressure relief solenoid valve interface, 28-exhaust solenoid valve interface, 29-water flow sensor interface, 30-pressure switch interface. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] Example 1

[0015] exist Figures 1 to 3 As shown in the schematic diagram of this utility model, an adjustable flow foam generator control system includes a power switch, a housing, power adapter terminals, a PCB board, a display screen, operation buttons, a gas pump, an exhaust solenoid valve, a liquid pump, a pressure relief solenoid valve, a power adapter, a water flow sensor, a pressure switch, a liquid outlet pipe, an air outlet pipe, a fan-shaped nozzle, gas pipe A, liquid pipe D, liquid pipe A, liquid pipe B, liquid pipe C, gas pipe B, a door, a spray gun, a switch button, a liquid pump interface, a gas pump interface, a pressure relief solenoid valve interface, an exhaust solenoid valve interface, a water flow sensor interface, and a pressure switch interface.

[0016] The cabinet door 22 is movably connected to the cabinet body 2. The bottom of the cabinet body has an air vent 5-1, a liquid inlet 5-2, a liquid outlet 5-3, and a pressure relief vent 5-4. Inside the cabinet door is a PCB board 4. Inside the cabinet body are a pressure relief solenoid valve 9, a water flow sensor 11, a pressure switch 12, a liquid pump 8, an exhaust solenoid valve 7, and a gas pump 6. The PCB board 4 mainly includes printed circuits for the liquid pump, gas pump, display screen, operation buttons, pressure relief, exhaust, alarm, start-up, water flow sensor, and pressure switch. It also includes interfaces for the liquid pump, gas pump, pressure relief solenoid valve, exhaust solenoid valve, water flow sensor, and pressure switch. The PCB board has a positive terminal (24V+), a negative terminal (24V-), an RS485 interface 17, a display screen 4-1, and operation buttons 4-2. The cabinet door has a through-hole for the display screen and five through-holes for the buttons. The display screen is positioned outside the cabinet door through this through-hole. The display screen 4-1 mainly displays the foam flow rate (L / Min), total foam usage (L), pressure setting (low / medium / high), pressure relief indicator, start indicator, and alarm indicator. The operating buttons mainly include a pressure relief button 4-2-1, a start button 4-2-2, a setting button 4-2-3, an up adjustment button 4-2-4, and a down adjustment button 4-2-5. These buttons are located outside the chamber door via five button holes. The inlet port 5-3, liquid pump 8, pressure switch 12, and water flow sensor 11 are connected sequentially via liquid pipeline A18. One output of the water flow sensor is connected to the outlet port 5-3 via liquid pipeline B19. The outlet port 5-3 is connected to the spray gun 23 via the outlet pipe 13-1. The spray gun is equipped with a switch button 24, and its output port is connected to the spray gun 23. The spray gun's output port is also connected to the fan-shaped nozzle 14. The other output of the water flow sensor is connected to the input of the pressure relief solenoid valve 9 via liquid pipeline C20. The output of the pressure relief solenoid valve 9 is connected to the pressure relief port 5-4 via liquid pipeline D16. One output of the gas pump 6 is connected to the air outlet port 5-1 via gas pipeline A15. The air outlet port 5-1 is connected to the fan-shaped nozzle 14 via the air outlet pipe 13-2. The other output of the gas pump 6 is connected to the exhaust solenoid valve 7 via gas pipeline B21. The liquid and gas are mixed and sprayed out as foam through the fan-shaped nozzle 14.

[0017] The power adapter 10 is placed outside the enclosure. The power adapter 10 inputs AC voltage 220V and outputs a positive voltage of 24V+ and a negative voltage of 24V-. The positive voltage 24V+ of the power adapter 10 is electrically connected to one positive terminal of the power adapter 3. The other positive terminal of the power adapter 10 is electrically connected to one end of the power switch 1. The other end of the power switch 1 is electrically connected to the positive interface 24V+ of the PCB board 4. The negative voltage 24V- of the power adapter 10 is electrically connected to one negative terminal of the power adapter 3. The negative terminal of the power adapter 10 is electrically connected to the negative interface 24V- of the PCB board 4. The water flow sensor 11 is electrically connected to the water flow sensor interface 29. The pressure switch 12 is electrically connected to the pressure switch interface 30. The liquid pump 8 is electrically connected to the liquid pump interface 25. The pressure relief solenoid valve 9 is electrically connected to the pressure relief solenoid valve interface 27. The gas pump 6 is electrically connected to the gas pump interface 26. The exhaust solenoid valve 7 is electrically connected to the exhaust solenoid valve interface 28.

[0018] During use, the power adapter outputs a positive voltage of 24V+ and a negative voltage of 24V-. The power adapter is electrically connected to terminal 3. Pressing the power switch illuminates the indicator light, activating the display circuit and the operation button circuit. Pressing and holding the setting button for more than 3 seconds enters the parameter setting state. Based on the flashing parameters on the display, press the up and down operation buttons to set the liquid flow rate, gas flow rate, and speed level. The speed level can be adjusted to low, medium, or high. The foam generator uses PWM control. Different speed levels, liquid flow rate parameters, and gas flow rate parameters control different operating voltages for the liquid and gas pumps. Different operating voltages result in different speeds for the liquid and gas pumps, indirectly controlling the foam output of the foam generator.

[0019] Pressing the start button activates the starting circuit, and the water flow sensor operates normally. Pressing the switch button 24 on spray gun 23 closes pressure switch 12, activating the liquid pump circuit and gas pump circuit, thus starting liquid pump 8 and gas pump 6. The equipment begins supplying liquid and gas. Liquid enters through inlet 5-2, passes sequentially through liquid pump 8, water flow sensor 11, and outlet 5-3, and reaches fan-shaped nozzle 14 through outlet pipe 13-1. Gas is generated by gas pump 6, passes sequentially through outlet 5-1 and outlet pipe 13-2, and reaches fan-shaped nozzle 14. The liquid and gas mix and are sprayed out through fan-shaped nozzle 14 to form foam.

[0020] During foaming, pressure switch 12 is used for control. After the fan-shaped nozzle 14 is closed, the pressure switch does not immediately disconnect, causing the liquid pump 8 and gas pump 6 to not stop working immediately. This results in gas entering the liquid pipeline, causing liquid and gas to mix. The pressure in the liquid pipeline becomes too high, preventing the pressure switch from closing when the fan-shaped nozzle 14 is opened next time, and the equipment cannot work. In this situation, pressing the pressure relief button connects the pressure relief circuit, the pressure relief indicator light on the display illuminates, and the pressure relief solenoid valve 9 operates, releasing the pressure in the liquid pipeline D16. Releasing the pressure relief button turns off the pressure relief indicator light on the display, allowing the equipment to start normally the next time it is used.

[0021] During foaming, a pressure switch is used for control. After the fan-shaped nozzle 14 is closed, the pressure switch does not immediately disconnect, causing the liquid pump 8 and gas pump 6 to not stop working immediately. This results in a certain pressure remaining in the gas pipeline. When restarted next time, due to the pressure difference between the inside and outside of the pipeline, excessive pressure can cause large foam spraying. When the fan-shaped nozzle 14 is closed, the pressure switch disconnects, the exhaust circuit is connected, the exhaust indicator light on the display illuminates, the exhaust solenoid valve 7 is energized, and excess gas in the gas pipeline is expelled. The exhaust indicator light on the display then goes out, making the pressure inside and outside the pipeline the same.

[0022] A water flow sensor detects the presence of liquid flow, thus determining whether the liquid in the storage tank connected to the inlet 5-2 is depleted. If the liquid in the storage tank is indeed depleted, the water flow sensor detects no liquid flow and sends a signal, activating the alarm circuit and emitting an alarm sound. The alarm indicator light on the display illuminates and an alarm code appears. Simultaneously, the liquid pump and gas pump stop operating. Pressing any operation button clears the alarm. After adding liquid to the storage tank, the alarm code on the display disappears, the alarm indicator light goes out, and the alarm is deactivated. The foam generator can then be restarted to continue operation.

[0023] If the water flow sensor short-circuit or open-circuit, the alarm circuit is activated, an alarm sound is emitted, the alarm indicator light on the display illuminates, and an alarm code appears. Simultaneously, the liquid pump and gas pump stop operating. Pressing any operation button will silence the alarm. Disconnect the power switch, inspect the water flow sensor circuit, and after inspection, close the power switch. The water flow sensor will then operate normally, the alarm code on the display will disappear, the alarm indicator light will turn off, and the alarm will be deactivated.

[0024] To stop this foam generator, simply disconnect the start button or power switch, and the liquid pump and gas pump will stop working.

[0025] The foam generator PCB board 4 has an RS485 interface, which allows users to easily monitor the liquid usage of the foam generator using a wireless network.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A control system for an adjustable flow rate foam generator, mainly comprising a power switch, a housing, power adapter terminals, a PCB board, a display screen, operation buttons, a gas pump, an exhaust solenoid valve, a liquid pump, a pressure relief solenoid valve, a power adapter, a water flow sensor, a pressure switch, a liquid outlet pipe, an air outlet pipe, a fan-shaped nozzle, gas pipe A, liquid pipe D, liquid pipe A, liquid pipe B, liquid pipe C, gas pipe B, a door, a spray gun, a switch button, a liquid pump interface, a gas pump interface, a pressure relief solenoid valve interface, an exhaust solenoid valve interface, a water flow sensor interface, and a pressure switch interface, characterized in that: The cabinet door is movably connected to the cabinet body. The bottom of the cabinet body has an air vent, a liquid inlet, a liquid outlet, and a pressure relief vent. A PCB board is located inside the door, and the cabinet body houses a pressure relief solenoid valve, a water flow sensor, a pressure switch, a liquid pump, an exhaust solenoid valve, and a gas pump. The PCB board mainly includes printed circuits for the liquid pump, gas pump, display screen, operation buttons, pressure relief, exhaust, alarm, start-up, water flow sensor, and pressure switch, as well as interfaces for the liquid pump, gas pump, pressure relief solenoid valve, exhaust solenoid valve, water flow sensor, pressure switch, and the PCB board positive terminal. The enclosure includes a 24V+ port, a 24V- port on the PCB board, an RS485 interface, a display screen, and operation buttons. The display screen and operation buttons are located outside the enclosure door. The inlet, liquid pump, pressure switch, and water flow sensor input are connected sequentially via liquid line A. One output of the water flow sensor is connected to the outlet via liquid line B. The outlet is connected to the spray gun via an outlet pipe. The spray gun has a switch button, and its output port is connected to a fan-shaped nozzle. The other output of the water flow sensor is connected to the input of the pressure relief solenoid valve via liquid line C. The output of the pressure relief solenoid valve is connected to the pressure relief port via liquid pipeline D. One output of the gas pump is connected to the air outlet via gas pipeline A. The air outlet is connected to the fan-shaped nozzle via the air outlet pipeline. The other output of the gas pump is connected to the exhaust solenoid valve via gas pipeline B. The liquid and gas mix and are sprayed out as foam through the fan-shaped nozzle. The power adapter is placed outside the enclosure. The power adapter input voltage is 220V AC, and the power adapter output voltage is 24V+ (positive) and 24V- (negative). The 24V+ output voltage is electrically connected to the positive terminal of the power adapter. The other end of the adapter terminal is electrically connected to one end of the power switch, and the other end of the power switch is electrically connected to the 24V+ positive interface of the PCB board. The negative voltage 24V- output of the power adapter is electrically connected to one end of the negative terminal of the power adapter, and the negative terminal of the power adapter is electrically connected to the 24V- negative interface of the PCB board. The water flow sensor is electrically connected to the water flow sensor interface, the pressure switch is electrically connected to the pressure switch interface, the liquid pump is electrically connected to the liquid pump interface, the pressure relief solenoid valve is electrically connected to the pressure relief solenoid valve interface, the gas pump is electrically connected to the gas pump interface, and the exhaust solenoid valve is electrically connected to the exhaust solenoid valve interface.

2. The adjustable flow rate foam generator control system according to claim 1, characterized in that: The display screen mainly shows the foam flow rate (L / Min), total foam usage (L), pressure setting (low / medium / high), pressure relief indicator, start indicator, and alarm indicator. The operation buttons mainly include the pressure relief button, start button, setting button, up adjustment button, and down adjustment button.

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