CN111905164A - Medical negative pressure suction device and adjusting method thereof - Google Patents
Medical negative pressure suction device and adjusting method thereof Download PDFInfo
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- CN111905164A CN111905164A CN202010861197.3A CN202010861197A CN111905164A CN 111905164 A CN111905164 A CN 111905164A CN 202010861197 A CN202010861197 A CN 202010861197A CN 111905164 A CN111905164 A CN 111905164A
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/74—Suction control
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Abstract
The invention relates to a medical negative pressure suction device, which solves the problems of the prior art that the negative pressure regulation difficulty is large, the regulation needs to be controlled through a negative pressure center, and a certain time delay exists, and has the technical scheme that the medical negative pressure suction device comprises two secondary regulators arranged on the wall of a use site, a first negative pressure connecting pipe and a second negative pressure connecting pipe which are communicated with the negative pressure center are arranged in each secondary regulator, an independent electromagnetic valve is arranged on each of the first negative pressure connecting pipe and the second negative pressure connecting pipe, a controller for controlling the electromagnetic valves is also arranged in each secondary regulator, the electromagnetic valves are electrically connected with the controller through corresponding driving circuits, the controller is also electrically connected with two regulating circuits, each regulating circuit corresponds to one electromagnetic valve, the first negative pressure connecting pipe and the second negative pressure connecting pipe are mutually connected in parallel and extend to form a negative pressure hose, the first negative pressure connecting pipe and the second negative pressure connecting pipe are provided with a negative pressure suction port at the end part together.
Description
Technical Field
The invention belongs to a negative pressure suction device, and relates to a medical negative pressure suction device and an adjusting method thereof.
Background
The negative pressure suction device is a tool which is manufactured by a certain method to enable the negative pressure state of a suction head, and the matter outside the suction head is extruded to the suction head, thereby completing the suction effect. In the medical treatment process, the negative pressure suction device mainly plays a role in sucking tissue fluid and the like, provides an auxiliary function for the operation during the operation, is carried out in a mode of carrying out centralized regulation and control on a negative pressure center at present, and is relatively complex to regulate during the operation.
Chinese patent CN208598872U discloses a portable negative pressure suction device in 2017, the structure comprises a negative pressure suction device body, a negative pressure suction bottle, a closed vacuum bottle, a fixed frame, a supporting leg, a negative pressure suction device, a barometer and a universal wheel, the left side of the top of the negative pressure suction device body is provided with a negative pressure suction bottle, the top of the negative pressure suction bottle is connected with a barometer through a pipeline, the right part of the barometer is provided with a pressure regulating valve, the left side of the top of the negative pressure suction bottle is connected with a first connecting pipe through a pipeline, the bottom of the first connecting pipe is provided with a negative pressure suction device, the right side of the top of the negative pressure suction bottle is provided with a second connecting pipe, the bottom of the second connecting pipe is provided with a sealed vacuum bottle, the bottoms of the negative pressure suction bottle and the sealed vacuum bottle are provided with a fixed seat, and fixed frames are welded on two sides of the top of the negative pressure suction device body. Although the technical content can be used for suction by means of field adjustment, the negative pressure supply range is limited due to the limitation of the structure of the negative pressure suction bottle adopted by the negative pressure suction device, the adjustable range is limited to a certain extent, and a larger improvement space exists.
Disclosure of Invention
The invention solves the problems that the negative pressure regulation in the prior art is difficult, the regulation needs to be controlled through a negative pressure center, and a certain time delay exists, and provides a medical negative pressure suction device and a regulation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: a medical negative pressure suction device is communicated with a negative pressure center through a connecting pipe, negative pressure is provided by the negative pressure center and primary regulation and control are carried out, the medical negative pressure suction device comprises secondary regulators arranged on a wall of a use site, a first negative pressure connecting pipe and a second negative pressure connecting pipe which are communicated with the negative pressure center are arranged in each secondary regulator, an independent electromagnetic valve is arranged on each first negative pressure connecting pipe and each second negative pressure connecting pipe, a controller for controlling the electromagnetic valves is further arranged in each secondary regulator, the electromagnetic valves are electrically connected with the controller through corresponding driving circuits, the controller is further electrically connected with two regulating circuits, each regulating circuit corresponds to one electromagnetic valve, the first negative pressure connecting pipe and the second negative pressure connecting pipe are connected in parallel and extend to form a negative pressure hose, and a negative pressure suction port is arranged at the end parts of the first negative pressure connecting pipe and the second negative pressure connecting pipe, the negative pressure hose is provided with a mechanical interlocking button near the end, and an adjusting slide block of the adjusting circuit is arranged on the negative pressure hose near the interlocking button. The invention solves the problems that the prior art adopts a two-stage regulation mode, the negative pressure regulation provided by a negative pressure center is a one-stage regulation mode, a two-stage regulator is additionally arranged behind the two-stage regulation mode, the actual negative pressure is controlled by controlling the opening degree of electromagnetic valves independently arranged on a first negative pressure connecting pipe and a second negative pressure connecting pipe, the first negative pressure connecting pipe and the second negative pressure connecting pipe are arranged in the invention, an automatic negative pressure suction mode and a manual negative pressure suction mode are mainly adopted, the manual suction mode can be locked by a mechanical interlocking button during automatic suction, the two working modes are interlocked by utilizing the controller, further, two different negative pressures can be designed for suction by the designed mode, the manual mode can be operated by a similar click mode, a small amount of tissue fluid is sucked, and more tissue fluid can be sucked in an automatic mode.
As preferred, mechanical interlocking button include button body, rectangle frame, normally open extension piece, normally closed extension piece and normally open protruding ball, normally closed protruding ball, the button body includes button top, button neck and button post, the rectangle frame cup joints on first negative pressure connecting pipe and the second negative pressure connecting pipe, the button body inserts in the rectangle frame, the button top pass through the button neck with the upper end fixed connection of button post, the outside cover of button neck is equipped with the spring, the upper end of spring with the lower terminal surface butt on button top, the lower extreme of spring with the upper surface butt of rectangle frame, the button post is located between first negative pressure connecting pipe and the second negative pressure connecting pipe, the height of button post is less than the height of rectangle frame, the lower extreme horizontal extension of button post forms normally closed extension piece, the utility model discloses a normal close extension piece, including button post, normally closed extension piece, rectangle frame, normally open extension piece, normally closed extension piece, the below of normally closed extension piece is the activity chamber, the upper end level of button post extends and forms normally open extension piece, normally open extension piece with the internal surface butt of rectangle frame, normally open extension piece is provided with normally open protruding ball downwards protrudingly, first negative pressure connecting pipe has been placed between the internal surface of normally closed protruding ball and rectangle frame, the second negative pressure connecting pipe has been placed between the internal surface of normally open protruding ball and rectangle frame. In the invention, in order to reduce the possibility of sudden change of negative pressure, a mechanical mode is required to be additionally arranged for interlocking so as to improve the safety.
Preferably, a spring groove is formed in a lower end of the button post, a lower spring is disposed in the spring groove, and a lower end surface of the lower spring abuts against an inner surface of the rectangular frame. The design of the upper spring and the lower spring ensures that the resilience of the spring is ensured, and the situation that the resilience is not in place due to the spring problem is avoided.
Preferably, the controller is further electrically connected with a switch K1 for switching between manual operation and automatic operation, the input end of the switch K1 is connected with a power supply through a voltage stabilizing chip U1, the automatic adjusting output end of the switch K1 is grounded through a diode D3, a resistor R4 and an adjusting resistor RT1 in sequence, the input end of the adjusting resistor RT1 is electrically connected with the controller, the manual adjusting output end of the switch K1 is grounded through a diode D4, a resistor R5 and an adjusting resistor RT2 in sequence, the input end of the adjusting resistor RT2 is electrically connected with the controller, and the adjusting ends of the adjusting resistor RT1 and the adjusting resistor RT2 are installed on the negative pressure hose as an adjusting slider at a position close to the interlock button.
Preferably, the drive circuit structures corresponding to the electromagnetic valves are the same.
Preferably, a driving circuit electrically connected to the controller includes a diode D1, an inductor L1, a fet Q1, a transistor Q2, a resistor R1 and a resistor R2, an anode of the diode D1 is connected to a power supply, a cathode of the diode D1 is connected to an input terminal of the solenoid valve M1 through the inductor L1, an output terminal of the solenoid valve M1 is connected to a drain of the fet Q1, a source of the fet Q1 is connected to ground through the resistor R1, a source of the fet Q1 is further connected to a base of the transistor Q2, a gate of the fet Q1 is connected to a first terminal of the resistor R3, a second terminal of the resistor R3 is electrically connected to the controller, a collector of the transistor Q2 is connected to a first terminal of the resistor R3, and a first terminal of the resistor R3 is connected to ground through the resistor R2.
Preferably, the controller is further electrically connected with an indicator, the indicator is an led indicator, the controller is further connected with a segment code display screen for displaying the current negative pressure value, and the segment code display screen and the led indicator are both installed on the surface of the secondary regulator. The segment code display screen is used for displaying data of the current negative pressure value, and the led indicator indicates the current manual operation mode.
A medical negative pressure suction device adjusting method is suitable for the medical negative pressure suction device, and comprises the following steps:
step one, the controller determines the current working mode of the medical negative pressure suction device according to the switching value of the current switch K1, if the medical negative pressure suction device is in the manual mode, the manual step one is executed, if the medical negative pressure suction device is in the automatic mode, the automatic step one is executed, and if the medical negative pressure suction device is in the closing mode, all electromagnetic valves are closed;
automatically, controlling the opening degree of the electromagnetic valve on the second negative pressure connecting pipe by the controller according to the resistance value of the adjusting resistor RT2, setting the electromagnetic valve on the first negative pressure connecting pipe to be closed by the controller, and presetting the instantaneous opening degree value when the electromagnetic valve on the first negative pressure connecting pipe is opened according to the resistance value of the adjusting resistor RT 1;
the automatic step II, the opening of the electromagnetic valve on the second negative pressure connecting pipe is adjusted in real time according to the resistance value of the adjusting resistor RT2, the medical negative pressure suction device continuously provides negative pressure, if the manual step is required to be switched according to the switching value of the switch K1, the manual step I is executed, otherwise, the automatic step II is continuously executed;
manually, controlling the opening of the electromagnetic valve on the first negative pressure connecting pipe by the controller according to the resistance value of the adjusting resistor RT1, setting the electromagnetic valve on the second negative pressure connecting pipe to be closed by the controller, and presetting the instantaneous opening value when the electromagnetic valve on the second negative pressure connecting pipe is opened according to the resistance value of the adjusting resistor RT 2;
and a manual step II, adjusting the opening of the electromagnetic valve on the first negative pressure connecting pipe in real time according to the resistance value of the adjusting resistor RT1, providing negative pressure by the medical negative pressure suction device according to the action of the interlocking button, executing the automatic step I if the automatic step needs to be switched according to the switching value of the switch K1, and otherwise, continuously executing the manual step II.
The invention can carry out secondary adjustment on site, can carry out manual and automatic suction according to the use requirement, and can obtain better use effect.
Preferably, when the difference between the instant opening value when the preset electromagnetic valve is opened and the current opening value of the other electromagnetic valve is greater than the threshold value and the working mode is switched, the preset adjusting substep is started:
the first preset adjustment substep is used for calculating the delay time corresponding to the difference value between the instant opening value when the preset electromagnetic valve is opened and the current opening value of the other electromagnetic valve;
a second preset adjustment substep, namely determining the number of a plurality of continuous instantaneous opening values when the electromagnetic valve is opened according to the length of the delay time, and setting a plurality of instantaneous opening values in an equipartition mode according to the number of the instantaneous opening values;
and a third preset adjusting substep, wherein the electromagnetic valve works in a mode of changing a plurality of continuous instantaneous opening values until the time delay is finished, the opening value of the electromagnetic valve is equal to the initial preset instantaneous opening value when the electromagnetic valve is opened, and the preset adjusting substep is finished. According to the invention, through reasonable adjustment, the negative pressure distinction between manual and automatic is obvious, but the difference between the negative pressures is not too large, through reasonable control, when a manual mode is needed, the interlocking buttons can be operated in a click-like mode, a small amount of tissue fluid is sucked by using instantaneous negative pressure, and through an automatic mode, continuous suction can be performed for more tissue fluid. In the manual and automatic switching process, the problems of backflow, organ injury and the like caused by negative pressure mutation can be prevented by using the preset delay time, and the method is a reliable safety measure.
The substantial effects of the invention are as follows: the invention solves the problems that the prior art adopts a two-stage regulation mode, the negative pressure regulation provided by a negative pressure center is a one-stage regulation mode, a two-stage regulator is additionally arranged behind the two-stage regulation mode, the actual negative pressure is controlled by controlling the opening degree of electromagnetic valves independently arranged on a first negative pressure connecting pipe and a second negative pressure connecting pipe, the first negative pressure connecting pipe and the second negative pressure connecting pipe are arranged in the invention, an automatic negative pressure suction mode and a manual negative pressure suction mode are mainly adopted, the manual suction mode can be locked by a mechanical interlocking button during automatic suction, the two working modes are interlocked by utilizing the controller, further, two different negative pressures can be designed for suction by the designed mode, the manual mode can be operated by a similar click mode, a small amount of tissue fluid is sucked, and more tissue fluid can be sucked in an automatic mode.
Drawings
FIG. 1 is an overall schematic of the present invention;
FIG. 2 is a circuit schematic of the control circuit of the present invention;
FIG. 3 is a schematic view of an interlock button according to the present invention;
FIG. 4 is a schematic diagram of the secondary regulator of the present invention;
in the figure: 1. the device comprises a first negative pressure connecting pipe, a second-stage regulator, a third-stage regulator, an adjusting slider, a fourth-stage regulator, an interlocking button, a fourth-stage regulator, a fifth-stage regulator, a sixth-stage regulator, a fifth-stage regulator, an.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
Example 1:
a medical negative pressure suction device (see attached figures 1 to 4) is communicated with a negative pressure center through a connecting pipe, negative pressure is provided by the negative pressure center for primary regulation and control, and comprises a secondary regulator 3 arranged on a wall of a use site, a first negative pressure connecting pipe 1 and a second negative pressure connecting pipe 2 communicated with the negative pressure center are arranged in each secondary regulator, an independent electromagnetic valve is arranged on each first negative pressure connecting pipe and each second negative pressure connecting pipe, a controller for controlling the electromagnetic valves is also arranged in each secondary regulator, the electromagnetic valves are electrically connected with the controller through corresponding driving circuits, the controller is also electrically connected with two regulating circuits, each regulating circuit corresponds to one electromagnetic valve, and the first negative pressure connecting pipe and the second negative pressure connecting pipe are mutually connected in parallel and extend to form a negative pressure hose, the end parts of the first negative pressure connecting pipe and the second negative pressure connecting pipe are provided with a negative pressure suction port 6, the position of the negative pressure hose close to the end part is provided with a mechanical interlocking button 5, and the adjusting slide block 4 of the adjusting circuit is arranged on the negative pressure hose close to the interlocking button. The interlocking button of mechanical type include button body, rectangle frame a5, normally open extension piece, normally closed extension piece and normally open protruding ball a7, normally closed protruding ball a6, the button body includes button top a1, button neck and button post a4, the rectangle frame cup joints on first negative pressure connecting pipe and the second negative pressure connecting pipe, the button body inserts in the rectangle frame, the button top pass through the button neck with the upper end fixed connection of button post, the outside cover of button neck is equipped with spring a2, the upper end of going up the spring with the lower terminal surface butt on button top, the lower extreme of going up the spring with the upper surface butt of rectangle frame, the button post is located between first negative pressure connecting pipe and the second negative pressure connecting pipe, the height of button post is less than the height of rectangle frame, the lower extreme horizontal extension of button post forms normally closed extension piece, the normally closed extension block is upwards provided with a normally closed convex ball in a protruding mode, a movable cavity a8 is arranged below the normally closed extension block, the upper end of the button column extends horizontally to form a normally open extension block, the normally open extension block is abutted to the inner surface of the rectangular frame, the normally open extension block is downwards provided with a normally open convex ball in a protruding mode, and a first negative pressure connecting pipe which is a first through cavity a9 is arranged between the normally closed convex ball and the inner surface of the rectangular frame; a second negative pressure connecting pipe is arranged between the normally open convex ball and the inner surface of the rectangular frame and is a second through-pipe cavity a 10. The lower end of the button post is provided with a spring groove, a lower spring a3 is arranged in the spring groove, and the lower end face of the lower spring is abutted to the inner surface of the rectangular frame. The controller still is electrically connected with a change over switch K1 that is used for switching manual and automatic, change over switch K1's input is passed through steady voltage chip U1 and is connected with the power, change over switch K1's automatically regulated output loops through diode D3, resistance R4 and adjusting resistance RT1 ground connection, adjusting resistance RT 1's input with the controller electricity is connected, change over switch K1's manual regulation output loops through diode D4, resistance R5 and adjusting resistance RT2 ground connection, adjusting resistance RT 2's input with the controller electricity is connected, adjusting resistance RT1 and adjusting resistance RT 2's regulation end is installed as the position that the regulation slider is close to the interlock button on the negative pressure hose. And the driving circuit structures corresponding to the electromagnetic valves are the same. A driving circuit electrically connected with the controller comprises a diode D1, an inductor L1, a field effect transistor Q1, a triode Q2, a resistor R1 and a resistor R2, wherein the anode of the diode D1 is connected with a power supply, the cathode of the diode D1 is connected with the input end of a solenoid valve M1 through an inductor L1, the output end of the solenoid valve M1 is connected with the drain of the field effect transistor Q1, the source of the field effect transistor Q1 is connected with the ground through a resistor R1, the source of the field effect transistor Q1 is also connected with the base of the triode Q2, the gate of the field effect transistor Q1 is connected with the first end of the resistor R3, the second end of the resistor R3 is electrically connected with the controller, the collector of the triode Q2 is connected with the first end of the resistor R3, and the first end of the resistor R63. The controller still electricity is connected with an indicator, the indicator is led indicator 8, the controller still is connected with a section code display screen 7 that is used for showing current negative pressure value, section code display screen and led indicator all install the surface at second grade modulator.
The embodiment solves the problems that the prior art adopts a two-stage regulation mode, the negative pressure regulation provided by a negative pressure center is a one-stage regulation mode, a two-stage regulator is additionally arranged behind the two-stage regulation mode, the regulation is carried out on site, the actual negative pressure is controlled by controlling the opening degree of electromagnetic valves independently arranged on a first negative pressure connecting pipe and a second negative pressure connecting pipe, in the invention, the first negative pressure connecting pipe and the second negative pressure connecting pipe are arranged, an automatic negative pressure suction mode and a manual negative pressure suction mode are mainly adopted, the manual suction mode can be locked by a mechanical interlocking button during automatic suction, the two working modes are interlocked by utilizing the controller, further, two different negative pressures can be designed to be sucked by the designed mode, the manual mode can be operated by a click-like mode, a small amount of tissue fluid is sucked, and more tissue fluid can be sucked in an automatic mode. The design of the upper spring and the lower spring ensures that the resilience of the spring is ensured, and the situation that the resilience is not in place due to the spring problem is avoided. In the embodiment, in order to reduce the possibility of sudden change of negative pressure, a mechanical mode needs to be additionally arranged for interlocking, so that the safety is improved.
A medical negative pressure suction device adjusting method is suitable for the medical negative pressure suction device, and comprises the following steps:
step one, the controller determines the current working mode of the medical negative pressure suction device according to the switching value of the current switch K1, if the medical negative pressure suction device is in the manual mode, the manual step one is executed, if the medical negative pressure suction device is in the automatic mode, the automatic step one is executed, and if the medical negative pressure suction device is in the closing mode, all electromagnetic valves are closed;
automatically, controlling the opening degree of the electromagnetic valve on the second negative pressure connecting pipe by the controller according to the resistance value of the adjusting resistor RT2, setting the electromagnetic valve on the first negative pressure connecting pipe to be closed by the controller, and presetting the instantaneous opening degree value when the electromagnetic valve on the first negative pressure connecting pipe is opened according to the resistance value of the adjusting resistor RT 1;
the automatic step II, the opening of the electromagnetic valve on the second negative pressure connecting pipe is adjusted in real time according to the resistance value of the adjusting resistor RT2, the medical negative pressure suction device continuously provides negative pressure, if the manual step is required to be switched according to the switching value of the switch K1, the manual step I is executed, otherwise, the automatic step II is continuously executed;
manually, controlling the opening of the electromagnetic valve on the first negative pressure connecting pipe by the controller according to the resistance value of the adjusting resistor RT1, setting the electromagnetic valve on the second negative pressure connecting pipe to be closed by the controller, and presetting the instantaneous opening value when the electromagnetic valve on the second negative pressure connecting pipe is opened according to the resistance value of the adjusting resistor RT 2;
and a manual step II, adjusting the opening of the electromagnetic valve on the first negative pressure connecting pipe in real time according to the resistance value of the adjusting resistor RT1, providing negative pressure by the medical negative pressure suction device according to the action of the interlocking button, executing the automatic step I if the automatic step needs to be switched according to the switching value of the switch K1, and otherwise, continuously executing the manual step II.
Preferably, when the difference between the instant opening value when the preset electromagnetic valve is opened and the current opening value of the other electromagnetic valve is greater than the threshold value and the working mode is switched, the preset adjusting substep is started:
the first preset adjustment substep is used for calculating the delay time corresponding to the difference value between the instant opening value when the preset electromagnetic valve is opened and the current opening value of the other electromagnetic valve;
a second preset adjustment substep, namely determining the number of a plurality of continuous instantaneous opening values when the electromagnetic valve is opened according to the length of the delay time, and setting a plurality of instantaneous opening values in an equipartition mode according to the number of the instantaneous opening values; specific examples herein are as follows:
when the difference value between the set instant opening value when the electromagnetic valve is opened and the current opening value of the other electromagnetic valve is in the range of T1-T2, setting the delay for 1 second, and setting 1 instant opening value, wherein the instant opening value is the mean value of the set instant opening value when the electromagnetic valve is opened and the current opening value of the other electromagnetic valve;
when the difference value between the set instant opening value when the solenoid valve is opened and the current opening value of the other solenoid valve is in the range of T2-T3, setting delay of 1.5 seconds, setting 2 instant opening values, and setting the 2 instant opening values to be equally divided according to the preset difference value.
When the difference value between the set instant opening value when the solenoid valve is opened and the current opening value of the other solenoid valve is in the range of T3 to T4, setting delay of 2 seconds, and setting 3 instant opening values, namely, setting 3 instant opening values to be equally divided according to a preset difference value.
And a third preset adjusting substep, wherein the electromagnetic valve works in a mode of changing a plurality of continuous instantaneous opening values until the time delay is finished, the opening value of the electromagnetic valve is equal to the initial preset instantaneous opening value when the electromagnetic valve is opened, and the preset adjusting substep is finished.
This embodiment is through reasonable regulation for negative pressure between manual and automatic distinguishes obviously, but is unlikely to again to make the difference between the negative pressure too huge, through reasonable control, when needing manual mode, can adopt the mode of similar clicking to operate the interlock button, utilizes instantaneous negative pressure to absorb a small amount of tissue liquid, and automatic mode then can carry out lasting absorption to more tissue liquid. In the manual and automatic switching process, the problems of backflow, organ injury and the like caused by negative pressure mutation can be prevented by using the preset delay time, and the method is a reliable safety measure.
To sum up, this embodiment can carry out the secondary control at the scene, can also carry out manual and automatic absorption according to the user demand, can obtain better result of use.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (9)
1. The utility model provides a medical negative pressure suction device, through connecting pipe and negative pressure center intercommunication, provides the negative pressure by negative pressure center and carries out one-level regulation and control, its characterized in that: the device comprises two secondary regulators arranged on a wall of a use site, wherein a first negative pressure connecting pipe and a second negative pressure connecting pipe communicated with a negative pressure center are arranged in each secondary regulator, an independent electromagnetic valve is arranged on each first negative pressure connecting pipe and each second negative pressure connecting pipe, a controller for controlling the electromagnetic valves is further arranged in each secondary regulator, the electromagnetic valves are electrically connected with the controller through corresponding driving circuits, the controller is further electrically connected with two regulating circuits, each regulating circuit corresponds to one electromagnetic valve, the first negative pressure connecting pipe and the second negative pressure connecting pipe are connected in parallel and extend to form a negative pressure hose, a negative pressure suction port is arranged at the end part of each first negative pressure connecting pipe and the end part of each second negative pressure connecting pipe, and a mechanical interlocking button is arranged at the position, close to the end part, of each negative pressure hose, and an adjusting slider of the adjusting circuit is arranged on the negative pressure hose at a position close to the interlocking button.
2. The medical negative pressure suction device according to claim 1, characterized in that: the interlocking button of mechanical type include button body, rectangle frame, normally open extension piece, normally closed extension piece and normally open protruding ball, normally closed protruding ball, the button body includes button top, button neck and button post, the rectangle frame cup joints on first negative pressure connecting pipe and the second negative pressure connecting pipe, the button body inserts in the rectangle frame, the button top pass through the button neck with the upper end fixed connection of button post, the outside cover of button neck is equipped with the spring, the upper end of spring with the lower terminal surface butt on button top, the lower extreme of spring with the upper surface butt of rectangle frame, the button post is located between first negative pressure connecting pipe and the second negative pressure connecting pipe, the height of button post is less than the height of rectangle frame, the lower extreme level extension of button post forms normally closed extension piece, normally closed extension piece upwards is provided with protruding ball, the utility model discloses a normal close extension piece, including button post, normally closed extension piece, protruding ball that is provided with of normally closed extension piece, the below of normally closed extension piece is the movable chamber, the upper end level of button post extends and forms normally open extension piece, normally open extension piece with the internal surface butt of rectangle frame, normally open extension piece is protruding downwards and is provided with normally open protruding ball, first negative pressure connecting pipe has been placed between the internal surface of normally closed protruding ball and rectangle frame, the second negative pressure connecting pipe has been placed between the internal surface of normally open protruding ball and rectangle frame.
3. The medical negative pressure suction device according to claim 2, characterized in that: the lower end of the button column is provided with a spring groove, a lower spring is arranged in the spring groove, and the lower end face of the lower spring is abutted to the inner surface of the rectangular frame.
4. The medical negative pressure suction device according to claim 1, 2 or 3, characterized in that: the controller still is electrically connected with a change over switch K1 that is used for switching manual and automatic, change over switch K1's input is passed through steady voltage chip U1 and is connected with the power, change over switch K1's automatically regulated output loops through diode D3, resistance R4 and adjusting resistance RT1 ground connection, adjusting resistance RT 1's input with the controller electricity is connected, change over switch K1's manual regulation output loops through diode D4, resistance R5 and adjusting resistance RT2 ground connection, adjusting resistance RT 2's input with the controller electricity is connected, adjusting resistance RT1 and adjusting resistance RT 2's regulation end is installed as the position that the regulation slider is close to the interlock button on the negative pressure hose.
5. The medical negative pressure suction device according to claim 4, characterized in that: and the driving circuit structures corresponding to the electromagnetic valves are the same.
6. The medical negative pressure suction device according to claim 5, characterized in that: a driving circuit electrically connected with the controller comprises a diode D1, an inductor L1, a field effect transistor Q1, a triode Q2, a resistor R1 and a resistor R2, wherein the anode of the diode D1 is connected with a power supply, the cathode of the diode D1 is connected with the input end of a solenoid valve M1 through an inductor L1, the output end of the solenoid valve M1 is connected with the drain of the field effect transistor Q1, the source of the field effect transistor Q1 is connected with the ground through a resistor R1, the source of the field effect transistor Q1 is also connected with the base of the triode Q2, the gate of the field effect transistor Q1 is connected with the first end of the resistor R3, the second end of the resistor R3 is electrically connected with the controller, the collector of the triode Q2 is connected with the first end of the resistor R3, and the first end of the resistor R63.
7. The medical negative pressure suction device according to claim 6, characterized in that: the controller still electricity is connected with an indicator, the indicator is the led indicator, the controller still is connected with a section code display screen that is used for showing current negative pressure value, section code display screen and led indicator all install the surface at second grade modulator.
8. A method for adjusting a medical negative pressure suction device, which is applied to the medical negative pressure suction device according to claim 7, characterized in that: the method comprises the following steps:
step one, the controller determines the current working mode of the medical negative pressure suction device according to the switching value of the current switch K1, if the medical negative pressure suction device is in the manual mode, the manual step one is executed, if the medical negative pressure suction device is in the automatic mode, the automatic step one is executed, and if the medical negative pressure suction device is in the closing mode, all electromagnetic valves are closed;
automatically, controlling the opening degree of the electromagnetic valve on the second negative pressure connecting pipe by the controller according to the resistance value of the adjusting resistor RT2, setting the electromagnetic valve on the first negative pressure connecting pipe to be closed by the controller, and presetting the instantaneous opening degree value when the electromagnetic valve on the first negative pressure connecting pipe is opened according to the resistance value of the adjusting resistor RT 1;
the automatic step II, the opening of the electromagnetic valve on the second negative pressure connecting pipe is adjusted in real time according to the resistance value of the adjusting resistor RT2, the medical negative pressure suction device continuously provides negative pressure, if the manual step is required to be switched according to the switching value of the switch K1, the manual step I is executed, otherwise, the automatic step II is continuously executed;
manually, controlling the opening of the electromagnetic valve on the first negative pressure connecting pipe by the controller according to the resistance value of the adjusting resistor RT1, setting the electromagnetic valve on the second negative pressure connecting pipe to be closed by the controller, and presetting the instantaneous opening value when the electromagnetic valve on the second negative pressure connecting pipe is opened according to the resistance value of the adjusting resistor RT 2;
and a manual step II, adjusting the opening of the electromagnetic valve on the first negative pressure connecting pipe in real time according to the resistance value of the adjusting resistor RT1, providing negative pressure by the medical negative pressure suction device according to the action of the interlocking button, executing the automatic step I if the automatic step needs to be switched according to the switching value of the switch K1, and otherwise, continuously executing the manual step II.
9. The method for adjusting a medical negative pressure suction device according to claim 8, characterized in that: when the difference value between the instant opening value when the preset electromagnetic valve is opened and the current opening value of the other electromagnetic valve is larger than the threshold value and the working mode is switched, starting a preset adjusting substep:
the first preset adjustment substep is used for calculating the delay time corresponding to the difference value between the instant opening value when the preset electromagnetic valve is opened and the current opening value of the other electromagnetic valve;
a second preset adjustment substep, namely determining the number of a plurality of continuous instantaneous opening values when the electromagnetic valve is opened according to the length of the delay time, and setting a plurality of instantaneous opening values in an equipartition mode according to the number of the instantaneous opening values;
and a third preset adjusting substep, wherein the electromagnetic valve works in a mode of changing a plurality of continuous instantaneous opening values until the time delay is finished, the opening value of the electromagnetic valve is equal to the initial preset instantaneous opening value when the electromagnetic valve is opened, and the preset adjusting substep is finished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010861197.3A CN111905164A (en) | 2020-08-25 | 2020-08-25 | Medical negative pressure suction device and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010861197.3A CN111905164A (en) | 2020-08-25 | 2020-08-25 | Medical negative pressure suction device and adjusting method thereof |
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| CN111905164A true CN111905164A (en) | 2020-11-10 |
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| CN202010861197.3A Pending CN111905164A (en) | 2020-08-25 | 2020-08-25 | Medical negative pressure suction device and adjusting method thereof |
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