CN113243880B

CN113243880B - Endoscope air-water supply system and endoscope

Info

Publication number: CN113243880B
Application number: CN202110634926.6A
Authority: CN
Inventors: 喻军; 曾恒; 李奕
Original assignee: Daichuan Medical Shenzhen Co ltd
Current assignee: Daichuan Medical Shenzhen Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-10-26
Anticipated expiration: 2041-06-08
Also published as: CN113243880A

Abstract

The invention provides a gas-water supply system of an endoscope and the endoscope. The pressure sensor is matched with the one-way valve, so that the condition that the operation is smoothly carried out due to the fact that the liquid pressure is greater than the human body safety threshold value due to overlarge gas pressure is avoided, and the safety of the endoscopic operation is effectively guaranteed. The pressure sensor, the controller and the air pump act together to timely regulate and control the air pressure to be greater than the internal pressure of the human body and to be smaller than the human body safety pressure threshold value, so that the liquid in the liquid supply pipeline can smoothly enter the human body, and the human body cannot be injured. The check valve is matched with the pressure sensor, the gas pressure in the gas supply pipeline is too high, and when the pressure sensor loses the control function, the internal structure of the check valve acts to cut off the gas supply pipeline, so that the liquid with too high pressure is prevented from entering the inside of a human body, and the safety of the endoscopic surgery is effectively ensured.

Description

Endoscope air-water supply system and endoscope

Technical Field

The invention relates to the technical field of medical instruments, in particular to an air-water supply system of an endoscope and the endoscope.

Background

Endoscopic devices are used to provide a surgeon with internal images of an organ or body lumen that requires treatment. Endoscopic devices typically have an instrument working channel through which a flexible instrument such as a biopsy forceps is inserted or accessed. One end of the endoscope has an imaging device, and the cable transmits image signals from the illuminated area to an extracorporeal visualization apparatus, and the movement of the working end of the instrument is controlled by the surgeon. The endoscopic device also has a gas and water supply system for irrigation, purging, cleaning, etc. purposes to provide sterile water or gas flow through the optical lens, the organ being treated, or the surface of the body lumen.

When the endoscope needs to perform the flushing function, water flow with proper pressure is adopted, and the pressure of the flushing water flow is higher than the pressure in the human body, so that the flushing effect is achieved; and the pressure of the flushing water flow is still less than the human body safety pressure threshold value. Currently, the problem of pressure control can be solved by the arrangement of pressure sensors, but there is a risk of failure of the pressure sensors. When the pressure sensor fails, the endoscope operation has safety risks, and the smooth operation of the operation is influenced.

Disclosure of Invention

The invention aims to solve the technical problems that in the endoscope in the prior art, a pressure sensor in an air-water supply system has failure risk, so that the endoscope operation has safety risk and the smooth operation is influenced.

In order to solve the technical problem, the invention provides an air-water supply system of an endoscope, which comprises an air-water bottle, an air supply pipeline, a liquid supply pipeline and a pressure control unit, wherein the air supply pipeline comprises a first air port and a second air port; the first air port is used for air to enter, and the second air port is introduced into the air bottle and is positioned above the liquid level of the liquid in the air bottle; the liquid supply pipeline comprises a first liquid port and a second liquid port, the first liquid port is used for being communicated with the body of a patient, and the second liquid port is communicated with the interior of the air bottle and is positioned below the liquid level of the liquid in the air bottle; the pressure control unit comprises an air pump, a pressure sensor and a one-way valve which are arranged on the air supply pipeline; the pressure sensor is used for sensing a pressure signal of gas in the gas supply pipeline and is in communication connection with a controller of the endoscope; the controller is electrically connected with the air pump to control the amount of air pumped into the air supply pipeline by the air pump according to the pressure signal; the check valve is used for controlling the on-off of the gas supply pipeline.

Alternatively, the one-way valve may be provided at a position on the gas supply line closer to the air bottle than a position at which the air pump is provided on the gas supply line.

Optionally, the check valve comprises a valve body and a piston piece, wherein both ends of the valve body are open and the valve body and the piston piece are hollow; openings at two ends of the valve body are respectively an air inlet and an air outlet, and an internal cavity of the valve body comprises an installation space, an air inlet channel communicated with the air inlet and an air outlet channel communicated with the air outlet; the piston piece is plugged at the joint of the mounting space and the air inlet channel, and the piston piece can move relative to the valve body so as to selectively break away from plugging the air inlet channel or plugging the air outlet channel.

Optionally, the piston member comprises a first piston and a second piston, and the first piston is sealed at the joint of the installation space and the air inlet channel; the second piston is abutted against the first piston and is matched with the air outlet channel so as to be used for plugging the air outlet channel.

Optionally, the check valve further includes a micro spring, one end of the micro spring abuts against the surface of the first piston, and the other end of the micro spring abuts against the inner wall of the installation space.

Optionally, the gas-water supply system further comprises a filter and/or a sterilizer, the filter and/or the sterilizer being disposed on the gas supply line, the filter and/or the sterilizer being disposed proximate to the first port of the gas supply line.

Optionally, the gas-water bottle comprises a bottle body and a bottle cap which is connected with the bottle body in a matching manner; a second gas port of the gas supply pipeline is communicated into the bottle body through the bottle cap, and the gas supply pipeline and the bottle cap are of an undetachable structure; and a second liquid port of the liquid supply pipeline is communicated into the bottle body through the bottle cap, and the liquid supply pipeline and the bottle cap are of a non-detachable structure.

Optionally, the bottle cap comprises a cap body and a sealing member of an annular structure or an L-shaped structure arranged on the inner side of the cap body; the sealing element with the L-shaped structure comprises an annular sealing main body and an annular bulge arranged on the end face of the sealing main body, and the inner diameter of the annular bulge is larger than that of the sealing main body; the sealing element of L shape structure set up in the lower surface of lid, annular arch with the lower surface of lid is fixed, sealed main part outwards stretches out the lid.

Optionally, the pressure control unit further comprises a gas chamber fixed inside the gas supply line; the gas chamber is internally provided with a hollow cavity, and an inlet and an outlet are respectively formed at two ends of the gas chamber in the gas supply pipeline in the gas flowing direction; the inlet and the outlet are communicated with the cavity and communicated with the interior of the gas supply pipeline; the pressure sensor is disposed in the cavity at a distance from the inlet and the outlet in a radial direction of the gas supply line.

Optionally, the plenum is of an axisymmetric configuration, the inlet and the outlet being on a central axis of the plenum, the central axis of the plenum being collinear with the central axis of the gas supply conduit.

Optionally, the inlet has a cross-sectional area that is less than a cross-sectional area of the outlet.

Optionally, the outer contour of the air chamber is an ellipsoid or a streamlined sphere gradually decreasing from the middle position to the two ends.

Alternatively, the pressure sensors are provided in pairs, and the two pressure sensors are arranged opposite to each other in a radial direction of the gas supply line.

Optionally, the pressure sensor includes a pressure sensing body and a circuit board electrically connected to the pressure sensing body, the pressure sensing body is configured to sense a pressure signal of the gas in the gas supply line, the circuit board is fixed to an inner wall of the gas supply line, the gas chamber is fixed to the circuit board, and the pressure sensing body is located in a cavity of the gas chamber.

Optionally, the pressure sensor includes two pressure sensing bodies electrically connected to the circuit board, where the two pressure sensing bodies are a main pressure sensing body and an auxiliary pressure sensing body, respectively; the main pressure sensing body is fixed on one side of the circuit board facing the air inlet direction, and the auxiliary pressure sensing body is fixed on one side of the circuit board departing from the air inlet direction.

Optionally, the gas-water supply system further comprises a temperature detection sensor, which is disposed on the gas supply pipeline and is used for detecting the temperature of the gas inside the gas supply pipeline to obtain a gas temperature raw signal; the temperature detection sensor is in communication connection with the controller to transmit the original gas temperature signal to the controller, so that the controller performs pressure compensation according to the original gas temperature signal and the pressure signal to obtain a pressure compensation value, and converts the pressure compensation value into a regulation pressure signal at a set temperature, so that the controller controls the amount of gas pumped into the gas supply pipeline by the gas pump according to the regulation pressure signal.

Optionally, the controller includes a gas pressure compensation module, a parameter setting module, and a pressure setting module, the gas pressure compensation module is configured to perform pressure compensation on the gas temperature original signal and the pressure signal to obtain a pressure compensation value, the parameter setting module is configured to convert the pressure compensation value into a pressure setting value at a set temperature, and the pressure setting module is configured to compare the pressure setting value with a set safe pressure range value to adjust the pressure setting value, so as to obtain the regulated pressure signal.

Optionally, the gas-water supply system further comprises a heater for heating the liquid in the gas-water bottle or the liquid in the liquid supply pipeline; the heater arranged on the liquid supply pipeline comprises a temperature detection module, a flow detection module, a heating controller and a heating module, wherein the temperature detection module is used for detecting the temperature of liquid in the liquid supply pipeline to obtain an original value of the liquid temperature; the flow detection module is used for detecting the flow of the liquid in the liquid supply pipeline to obtain a liquid flow value; the heating controller is electrically connected with the temperature detection module and the flow detection module so as to receive signals of the liquid temperature original value and the liquid flow value, obtain a temperature difference value according to the comparison of a set temperature value and the liquid temperature original value, and obtain a heating power value according to the temperature difference value and the liquid flow value; the heating module is electrically connected with the heating controller to receive the signal of the heating power value and heat the liquid in the liquid supply pipeline according to the signal of the heating power value.

Optionally, the heating controller includes a temperature setting module and a heating power calculating module, the temperature setting module is configured to set the set temperature value, and the heating power calculating module is configured to obtain a temperature difference value according to a comparison between the set temperature value and the original liquid temperature value, and obtain a heating power value according to the temperature difference value and the liquid flow value.

The invention also provides an endoscope, which comprises an endoscope main body and a controller, and further comprises the gas-water supply system of the endoscope, wherein the gas supply pipeline and the liquid supply pipeline are both arranged in the endoscope main body; the controller is in communication connection with a pressure sensor in the gas-water supply system to receive a pressure signal of the pressure sensor; the controller is electrically connected with an air pump in the air-water supply system so as to control the amount of air pumped into the air supply pipeline by the air pump according to the pressure signal.

According to the technical scheme, the beneficial effects of the invention are as follows: in the air-water supply system of the endoscope and the endoscope, the air supply pipeline is provided with the pressure sensor, the air pump and the one-way valve, and the pressure sensor and the one-way valve are matched with each other to avoid the situation that the smooth operation is influenced because the liquid pressure is greater than the human body safety threshold value due to overlarge air pressure, so that the safety of the endoscopic operation is effectively ensured. The pressure sensor, the controller and the air pump act together to timely regulate and control the gas pressure in the gas supply pipeline to be greater than the internal pressure of a human body and be smaller than a human body safety pressure threshold value, so that liquid in the liquid supply pipeline can smoothly enter the human body, and the human body cannot be injured. The check valve is matched with the pressure sensor, the gas pressure in the gas supply pipeline is too high, and when the pressure sensor loses the control function, the internal structure of the check valve acts to cut off the gas supply pipeline, so that the liquid with too high pressure is prevented from entering the inside of a human body, and the safety of the endoscopic surgery is effectively ensured.

Drawings

FIG. 1 is a block diagram showing the structure of an embodiment of an air and water supply system for an endoscope according to the present invention.

Fig. 2 is a schematic structural view of a check valve in the gas-water supply system shown in fig. 1.

Fig. 3 is a schematic view of the internal structure of the check valve shown in fig. 2.

Fig. 4 is a schematic structural view of the arrangement of the pressure sensor and the check valve on the gas supply line in the gas-water supply system shown in fig. 1.

FIG. 5 is a schematic view showing the construction of a pressure sensor and a gas chamber on a gas supply line in the gas-water supply system shown in FIG. 1.

Fig. 6 is a cross-sectional view taken along a-a of fig. 5.

FIG. 7 is a schematic diagram of the structure of a pressure sensor and a gas chamber in another example of the gas-water supply system shown in FIG. 5.

FIG. 8 is a schematic view of the structure of a pressure sensor and a gas chamber in still another example of the gas-water supply system shown in FIG. 5.

Fig. 9 is a sectional view taken along the direction B-B of fig. 8.

FIG. 10 is a schematic view of the structure of a pressure sensor and a gas chamber in still another example of the gas-water supply system shown in FIG. 5.

FIG. 11 is a schematic view of the structure of a pressure sensor and a gas chamber in still another example of the gas-water supply system shown in FIG. 5.

FIG. 12 is a flow chart of the operation of the temperature detecting sensor in the embodiment of the air and water supply system of the endoscope according to the present invention.

FIG. 13 is a flowchart of the operation of a heater in the gas-water supply system shown in FIG. 1.

Fig. 14 is a schematic structural view of an air-water bottle in the air-water supply system shown in fig. 1.

The reference numerals are explained below: 100. a gas-water supply system; 10. a gas-water bottle; 11. a bottle body; 12. a bottle cap; 121. a cover body; 122. a seal member; 1221. a sealing body; 1222. an annular projection; 20. a gas supply line; 30. a liquid supply line; 40. a pressure control unit; 41. an air pump; 42. a pressure sensor; 42a, a first pressure sensor; 42b, a second pressure sensor; 421. a pressure sensing body; 4211. a primary pressure sensing body; 4212. a secondary pressure sensing body; 422. a circuit board; 43. a one-way valve; 431. a valve body; 4311. an air inlet; 4312. an air outlet; 4313. an installation space; 4314. an air intake passage; 4315. an air outlet channel; 432. a piston member; 4321. a first piston; 4322. a second piston; 433. a micro-spring; 44. an air chamber; 441. a cavity; 442. an inlet; 443. an outlet; 50. a filter; 60. a sterilizer; 70. a heater; 71. a temperature detection module; 72. a flow detection module; 73. a heating controller; 731. a temperature setting module; 732. a heating power calculation module; 74. a heating module; 80. a temperature detection sensor; 200. a controller; 201. an air pressure compensation module; 202. a parameter setting module; 203. and a pressure setting module.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.

Referring to fig. 1, an embodiment of the present application provides a gas-water supply system 100 for an endoscope, for supplying gas and liquid in the endoscope, wherein the gas-water supply system 100 includes a gas-water bottle 10, a gas supply pipeline 20, a liquid supply pipeline 30 and a pressure control unit 40.

The gas supply line 20 includes a first gas inlet for gas to enter and a second gas inlet which is connected to the inside of the gas-water bottle 10 and is located above the liquid level of the liquid in the gas-water bottle. The liquid supply line 30 includes a first liquid port for accessing the patient's body and a second liquid port for accessing the interior of the air bottle 10 and located below the liquid level of the liquid in the air bottle 10.

The pressure control unit 40 includes an air pump 41 provided on the air supply line 20, a pressure sensor 42, and a check valve 43. A pressure sensor 42 is used to sense a pressure signal of the gas in the gas supply line 20, the pressure sensor 42 being communicatively connected to the controller 200 of the endoscope. The controller 200 is electrically connected to the air pump 41 to control the amount of air pumped by the air pump 41 into the air supply tube according to the pressure signal. The check valve 43 is used to control the on/off of the gas supply line 20.

When the gas-water supply system 100 of the present embodiment is used, the gas-water bottle 10 contains liquid. The gas supply line 20 and the liquid supply line 30 are both communicated with the gas-water bottle 10. The second gas port of the gas supply line 20 is located above the liquid level and the second liquid port of the liquid supply line 30 extends below the liquid level.

The first liquid port of the liquid supply line 30 leads into the patient, and gas enters the gas supply line 20 through the first gas port and enters the gas bottle 10. Under the action of the air pressure, the liquid in the air-water bottle 10 enters the liquid supply pipeline 30 and enters the body of the patient through the liquid supply pipeline 30, so as to wash the pathological tissues or the lens at the head end of the endoscope.

In the operation of the gas-water supply system 100, when the liquid supply line 30 flushes the lesion tissue, the liquid pressure is equal to the gas pressure. By monitoring the gas pressure, the liquid pressure in the respective liquid supply line 30 can be known. The pressure of the liquid needs to be greater than the pressure inside the human body to achieve the flushing effect, and meanwhile, the pressure of the liquid needs to be smaller than the human body safety pressure threshold value to ensure the safety of the operation process.

Further, an air pump 41 is disposed on the air supply line 20, and the air pump 41 is used for pumping air into the air supply line 20. By controlling the air pump 41, the control of the amount of air taken in the air supply line 20 can be achieved.

The gas supply line 20 is also provided with a pressure sensor 42, and the pressure sensor 42 is used for sensing a pressure signal of the gas in the gas supply line 20. Monitoring of the gas pressure in the gas supply line 20 by the pressure sensor 42 may correspondingly reflect the liquid pressure in the liquid supply line 30.

In the present embodiment, the pressure sensor 42 is communicatively connected to the controller 200 of the endoscope. Meanwhile, the controller 200 is also electrically connected to the air pump 41 on the air supply line 20.

The pressure sensor 42 transmits the sensed pressure signal of the gas in the gas supply line 20 to the controller 200 in real time, and the controller 200 analyzes and processes the corresponding pressure data. When the controller 200 analyzes that the gas pressure value is greater than the human body safety pressure threshold value, that is, the liquid pressure is greater than the human body safety pressure threshold value, the controller 200 generates a corresponding control signal to control the air pump 41, so as to reduce the amount of gas pumped into the gas supply pipeline 20 by the air pump 41, so that the liquid pressure is less than the human body safety pressure threshold value, and the safety of the operation is ensured.

When the controller 200 analyzes that the pressure value of the gas is smaller than the internal pressure of the human body, i.e. the liquid pressure is smaller than the internal pressure of the human body, the controller 200 generates a corresponding control signal to control the air pump 41, so as to increase the amount of the gas pumped into the gas supply pipeline 20 by the air pump 41, so that the liquid pressure is greater than the internal pressure of the human body, so that the liquid can enter the body of the patient, and the smooth operation is ensured.

Further, a check valve 43 is disposed on the gas supply line 20, and the check valve 43 is used for controlling the on/off of the gas supply line 20. In the normal working process of the gas-water supply system 100, the check valve 43 is normally open, so as to ensure the smooth circulation of gas in the gas supply pipeline 20. When the pressure sensor 42 fails or the air pump 41 is insensitive, the one-way valve 43 can directly act to cut off the air supply pipeline 20, so that the liquid pressure is prevented from being larger than the human body safety pressure threshold, the operation risk is avoided, and the safety is improved.

The one-way valve 43 is provided on the gas supply line 20 at a position closer to the air bottle 10 than the position at which the air pump 41 is provided on the gas supply line 20. This kind of setting makes check valve 43 be closer to the second gas port of gas supply pipeline 20, is more close to the port that the gas flows out in the gas supply pipeline 20 promptly, when guaranteeing that the gas circulates smoothly in the gas supply pipeline 20, can also in time cut off gas supply pipeline 20 based on the timely feedback of gas pressure, guarantees check valve 43 to the validity of gas supply pipeline 20 on-off control.

Further, as shown in fig. 1, a filter 50 is disposed on the gas supply line 20, and the filter 50 is disposed near the first port of the gas supply line 20, that is, near the port of the gas supply line 20 for the intake gas.

In this embodiment, the filter 50 may include an air screen of activated carbon and meltblown. When the gas passes through the filter 50, the activated carbon can adsorb and filter impurities in the gas, so that the clean gas enters the gas-water bottle 10, the liquid in the gas-water bottle 10 is prevented from being polluted, the clean liquid or the clean gas can pass through the lens at the head end of the endoscope, the surface of the internal tissues of the human body or the surface of the internal cavity of the human body, and the clean environment for the operation is ensured.

The gas supply line 20 of the present embodiment is further provided with a sterilizer 60, and the sterilizer 60 may be an ultraviolet sterilization component, and the ultraviolet sterilization component can sterilize the gas. The sterilized gas enters the gas-water bottle 10, so that the liquid in the gas-water bottle 10 can be prevented from being polluted, the sterile liquid or gas is ensured to pass through the lens at the head end of the endoscope, the internal tissues of the human body or the surface of the internal cavity of the human body, and the sterile environment for the operation is ensured.

In addition, in the present embodiment, the air-water supply system 100 further includes a heater 70, and the heater 70 is used for heating the liquid in the air-water bottle 10 or the liquid supply line 30.

The heater 70 can be arranged on the air water bottle 10 or directly arranged on the liquid supply pipeline 30, so that the liquid in the liquid supply pipeline 30 is heated, and the temperature range is 25-35 ℃. Liquid after the intensification gets into human inside back, can reduce because of the temperature crosses adverse reactions such as the postoperative flatulence that arouses excessively, can also avoid the problem of endoscope head end camera lens fogging simultaneously, guarantees the definition that endoscope head end camera lens shot the image.

Referring to fig. 2 and 3, in the present embodiment, the check valve 43 includes a valve body 431 and a piston member 432, which are open at two ends and hollow inside, and the two ends of the valve body 431 are open at an air inlet 4311 and an air outlet 4312, respectively.

The inner cavity of the valve body 431 includes a mounting space 4313, an inlet channel 4314, and an outlet channel 4315. Wherein, the inlet channel 4314 is communicated with the inlet 4311, and the outlet channel 4315 is communicated with the outlet 4312. The piston member 432 is blocked at the connection between the mounting space 4313 and the inlet channel 4314, and the piston member 432 is movable relative to the valve body 431 to selectively block the inlet channel 4314 or block the outlet channel 4315.

The piston member 432 of this embodiment includes a first piston 4321 and a second piston 4322. The first piston 4321 is sealed at the connection between the mounting space 4313 and the air inlet channel 4314. The second piston 4322 abuts against the first piston 4321, and the second piston 4322 is adapted to the air outlet channel 4315 for sealing the air outlet channel 4315. In this embodiment, the one-way valve 43 further comprises a micro-spring 433. One end of the micro spring 433 abuts on a surface of the first piston 4321, and the other end abuts on an inner wall of the mounting space 4313.

When the gas-water supply system 100 is in a non-working state, i.e. when no gas flows through the gas supply pipeline 20, the check valve 43 is in a normally closed state, and at this time, under the elastic force of the micro spring 433, the micro spring 433 abuts against the first piston 4321, so that the first piston 4321 blocks the connection between the installation space 4313 and the gas inlet channel 4314, and the gas supply pipeline 20 is in a disconnected state.

The check valve 43 is normally open when the gas-water supply system 100 is in normal operation, i.e. when gas flows through the gas supply line 20. At this time, the gas enters the check valve 43 through the inlet channel 4314, the gas pushes up the first piston 4321, the first piston 4321 is separated from the sealing of the connection between the installation space 4313 and the inlet channel 4314, and the micro spring 433 is compressed. The gas pressure is greater than the internal pressure of the human body and less than the human body safety pressure threshold, the second piston 4322 and the gas outlet channel 4315 are in a disengaged state, i.e. the gas inlet channel 4314 is communicated with the gas outlet channel 4315 through the installation space 4313, and the gas can smoothly circulate in the gas supply pipeline 20 through the check valve 43.

When the gas pressure is greater than the human body safety pressure threshold, the gas jacks up the first piston 4321, the micro spring 433 is compressed, and at this time, the first piston 4321 jacks up the second piston 4322, so that the second piston 4322 blocks the gas outlet channel 4315, the check valve 43 is closed, the gas supply pipeline 20 is disconnected, liquid with high hydraulic pressure is prevented from entering the human body, and the safety of the operation is ensured.

With reference to fig. 4, compared with the position of the check valve 43 on the gas supply pipeline 20, the pressure sensor 42 is closer to the gas source, such a setting enables the pressure sensor 42 to feed back the internal pressure condition of the gas supply pipeline 20 in time, and enables the check valve 43 to be closer to the second gas port 21 of the gas supply pipeline 20, i.e. closer to the port where the gas flows out in the gas supply pipeline 20, so as to ensure smooth circulation of the gas in the gas supply pipeline 20, and meanwhile, timely feed back to the gas supply pipeline 20 based on the gas pressure to cut off the gas supply pipeline 20, thereby ensuring the effectiveness of the check valve 43 in combination with the pressure sensor 42 in controlling the on/off of the gas supply pipeline 20.

In this embodiment, the pressure sensor 42 and the one-way valve 43 are matched with each other to avoid the situation that the operation is smoothly performed due to the fact that the liquid pressure is greater than the human body safety threshold value because of the excessive gas pressure, so as to effectively ensure the safety of the endoscopic operation. The pressure sensor 42, the controller 200 and the air pump 41 cooperate to regulate the pressure of the air in the air supply line 20 to be higher than the internal pressure of the human body and lower than the human body safety pressure threshold value, so as to ensure that the liquid in the liquid supply line 30 can smoothly enter the human body without causing any harm to the human body. The check valve 43 is matched with the pressure sensor 42, when the gas pressure in the gas supply pipeline 20 is too high and the pressure sensor 42 loses the control function, the internal structure of the check valve 43 acts to cut off the gas supply pipeline 20, so that the liquid with too high pressure is prevented from entering the human body, and the safety of the endoscopic surgery is effectively ensured.

Referring to fig. 5 and 6, the pressure control unit 40 of the present embodiment further includes a gas chamber 44, and the gas chamber 44 is fixed inside the gas supply pipeline 20 and is used for providing a sheltering position for the pressure sensor 42 to prevent the pressure sensor from being affected by the disturbance of the gas flow, so as to eliminate the dynamic pressure value and accurately obtain the static pressure value, thereby achieving accurate feedback and accurate adjustment of the inlet pressure in the gas supply pipeline 20.

In the present embodiment, the air chamber 44 has a hollow cavity 441 therein. The outer contour of the air chamber is ellipsoidal, and the two ends of the air chamber in the direction of gas flow are respectively provided with an inlet 442 and an outlet 443, and the inlet 442 and the outlet 443 are both communicated with the cavity and the interior of the gas supply pipeline 20.

The pressure sensor 42 is disposed in the cavity 441, and in the radial direction of the gas supply pipeline 20, the pressure sensor 42 has a distance from both the inlet 442 and the outlet 443, that is, the pressure sensor 42 is not located on a connecting line of the inlet 442 and the outlet 443, so that the inner wall of the gas chamber 44 shields the pressure sensor 42 in the gas flowing direction, the gas flow is prevented from disturbing the pressure sensor 42, the pressure value measured by the pressure sensor 42 is more accurate, and the measurement accuracy is improved.

The plenum 44 of this embodiment is of an axisymmetric configuration, with the inlet 442 and the outlet 443 both being on a central axis of the plenum 44, and the central axis of the plenum 44 being collinear with the central axis of the gas supply line 20. In the present embodiment, the cross-sectional area of inlet 442 is smaller than the cross-sectional area of outlet 443 to further reduce the effect of intake airflow on the disturbance of pressure sensor 42 and improve the accuracy of the pressure measurement.

As shown in FIG. 7, in another example of the present embodiment, the outer contour of the air chamber 44 may be a streamline sphere, which gradually decreases from the middle position to the inlet 442 and the outlet 443 at the two ends. The air chamber 44 with such a structure can better conform to the flow of the air in the air supply pipeline 20, so that the interference of the air chamber 44 to the measurement of the pressure value is reduced, and the accuracy of the measurement of the pressure value is effectively improved.

Referring to fig. 5 and 7, the pressure sensor 42 of the present embodiment includes a pressure sensing body 421 and a circuit board 422, and the circuit board 422 is electrically connected to the pressure sensing body 421. The circuit board 422 has a bar shape, one end of which is fixed to the inner wall of the gas supply line 20 and extends in the radial direction of the gas supply line 20. The pressure sensing body 421 is fixed at the other end of the circuit board 422, the pressure sensing body 421 is used for sensing a pressure signal of the gas in the gas supply pipeline 20, and the circuit board 422 is used for supplying power to the pressure sensing body 421 and transmitting the pressure signal.

In this embodiment, the air chamber 44 is fixed on the circuit board 422. The circuit board 422 is used to fix the pressure sensing body 421, so that the end of the pressure sensing body 421 extends into the cavity 441 of the air chamber 44, and the pressure sensing body 421 is located inside the cavity 441.

The gas chamber 44 is fixed in the gas supply pipeline 20 by the functional element circuit board 422 of the pressure sensor 42, so that the function of the circuit board 422 is integrated, the circuit board 422 is used as a functional element and a connecting piece, the arrangement of mounting parts of the gas chamber 44 can be omitted, and the whole structure of the gas-water supply system 100 is simplified.

It is understood that in other examples, the gas chamber 44 may be fixed in the gas supply line 20 by other connecting structures, such as rod-shaped connecting arms, fixing brackets, etc., without being limited thereto, as long as the installation of the gas chamber 44 in the gas supply line 20 can be ensured.

As shown in fig. 8 and 9, the pressure sensors 42 may be provided in pairs, and the two pressure sensors 42 are a first pressure sensor 42a and a second pressure sensor 42b, respectively. The first pressure sensor 42a and the second pressure sensor 42b are arranged opposite to each other in the radial direction of the gas supply line 20.

The air chamber 44 is fixed inside the gas supply pipe 20 by the circuit boards 422 of the two pressure sensors 42, and the pressure sensing body 421 of the first pressure sensor 42a and the pressure sensing body 421 of the second pressure sensor 42b are both located in the cavity 441 of the air chamber 44.

The first and

second pressure sensors

42a and 42b are electrically connected to the controller 200 to transmit respective sensed pressure signals to the controller 200. The controller 200 can integrate the two pressure values to obtain an average value, so that the measurement error caused by the non-uniform air flow is avoided, and the accuracy of pressure value measurement is ensured.

Further, as shown in fig. 10, in another example of the present embodiment, each pressure sensor 42 includes two pressure sensing bodies, each pressure sensing body 421 is electrically connected to the circuit board 422, and the two pressure sensing bodies are a main pressure sensing body 4211 and a sub pressure sensing body 4212, respectively.

The main pressure sensing body 4211 is fixed on one side of the circuit board 422 facing the air intake direction, and the auxiliary pressure sensing body 4212 is fixed on one side of the circuit board 422 facing away from the air intake direction.

Complementary air pressure areas are formed on two sides of the circuit board 422, pressure values sensed by the main pressure sensing body 4211 and the auxiliary pressure sensing body 4212 are transmitted to the controller 200, the controller 200 can integrate the two pressure values to obtain an average value so as to obtain an air pressure value closest to a static state, and therefore the air pressure value can be compared with a human body safety air pressure threshold more accurately, the problem that the single pressure sensor 42 cannot accurately reflect an air inlet pressure value is avoided, and accuracy of pressure measurement is guaranteed.

Referring to fig. 11, in another example of the present embodiment, two pressure sensors are provided, namely a first pressure sensor 42a and a second pressure sensor 42b, which have two pressure sensing bodies 421. The first pressure sensor 42a includes a circuit board 422 and two pressure sensing bodies, which are a main pressure sensing body 4211 and a sub pressure sensing body 4212 respectively disposed at both sides of the circuit board 422, and the second pressure sensor 42b includes a circuit board 422 and two pressure sensing bodies, which are a main pressure sensing body 4211 and a sub pressure sensing body 4212 respectively disposed at both sides of the circuit board 422.

The first pressure sensor 42a and the second pressure sensor 42b are arranged opposite to each other in the radial direction of the gas supply line 20. The air chamber 44 is fixed inside the gas supply pipe 20 by the circuit boards 422 of the two pressure sensors 42, and the primary pressure sensing body 4211 and the secondary pressure sensing body 4212 of the first pressure sensor 42a and the primary pressure sensing body 4211 and the secondary pressure sensing body 4212 of the second pressure sensor 42b are both located in the cavity 441 of the air chamber 44.

The first and

second pressure sensors

42a and 42b are electrically connected to the controller 200 to transmit respective sensed pressure signals to the controller 200. The controller 200 can integrate and average four pressure values respectively obtained from the four pressure sensing main bodies to avoid measurement errors caused by uneven airflow and ensure the accuracy of pressure value measurement.

Further, as shown in fig. 12, the gas-water supply system 100 of the present embodiment further includes a temperature detection sensor 80. The temperature detection sensor 80 is disposed on the gas supply line for detecting the temperature of the gas inside the gas supply line, thereby obtaining a gas temperature raw signal.

The temperature detecting sensor 80 is in communication connection with the controller 200 of the endoscope to transmit the gas temperature original signal to the controller, so that the controller 200 performs pressure compensation according to the gas temperature original signal and the pressure signal to obtain a pressure compensation value, and converts the pressure compensation value into a regulation pressure signal at a set temperature, so that the controller 200 controls the amount of gas pumped into the gas supply pipeline 20 by the gas pump according to the regulation pressure signal.

Wherein the set temperature is a constant temperature for normal use of the endoscope. Through pressure compensation, the change of gas pressure caused by the rise or the fall of the ambient temperature can be avoided on the basis of a certain flow of the gas pump, so that the controller 200 can accurately regulate and control the gas pump, influence factors of the ambient temperature are eliminated, and the gas pump 41 can be effectively ensured to pump gas with an accurate flow into the gas supply pipe 20.

In the present embodiment, the controller 200 includes a barometric pressure compensation module 201, a parameter tuning module 202, and a pressure setting module 203. The air pressure compensation module 201 is configured to perform pressure compensation on the original air temperature signal and the pressure signal sensed by the pressure sensor, so as to obtain a pressure compensation value. The parameter setting module 202 is configured to convert the pressure compensation value into a pressure setting value at a set temperature. The pressure setting module 203 is configured to adjust the pressure setting value by comparing the pressure setting value with a set safe pressure range value, so as to obtain a regulated pressure signal.

The safe pressure range value is a pressure value when the endoscope is normally used in different set endoscope use scenes.

As shown in fig. 13, the heater 70 provided on the liquid supply line 30 includes a temperature detection module 71, a flow rate detection module 72, a heating controller 73, and a heating module 74.

The temperature detecting module 71 is configured to detect a temperature of the liquid in the liquid supply line 30, so as to obtain an original value of the liquid temperature. The flow detection module 72 is used for detecting the flow of the liquid in the liquid supply line 30, so as to obtain a liquid flow value.

The heating controller 73 is electrically connected to the temperature detection module 71 and the flow rate detection module 72 to receive signals of the liquid temperature original value and the liquid flow rate value, obtain a temperature difference value according to a comparison between a set temperature value and the liquid temperature original value, and obtain a heating power value according to the temperature difference value and the liquid flow rate value.

The set temperature value is a user-defined temperature value, namely a temperature value which is finally reached by the liquid expected by the user. If the user does not input, the set temperature is defaulted to be a constant temperature, and the temperature range of the inside of the human body is preferably 37.5-38.5 ℃.

The heating module 74 is electrically connected to the heating controller 73 to receive the signal of the heating power value and heat the liquid in the liquid supply line 30 according to the signal of the heating power value. In the present embodiment, the heating module 74 may be a resistance wire, a resistance membrane, or other heating structure that may be heated around the liquid supply line 30.

In the present embodiment, the heating controller 73 includes a temperature setting module 731 and a heating power calculation module 732. The temperature setting module 731 is used for setting a set temperature value, which can be input by a user. The heating power calculating module 732 is configured to obtain a temperature difference value according to a comparison between the set temperature value and the liquid temperature original value, and obtain a heating power value according to the temperature difference value and the liquid flow value.

The heating module 74 heats the liquid in the liquid supply pipeline 30 according to the signal of the heating power value, so that the temperature of the liquid can accurately reach the expected temperature of the user, the regulation and control are more accurate, and the endoscope operation can be smoothly performed.

Further, as shown in fig. 14, the air water bottle 10 of the present embodiment includes a bottle body 11 and a bottle cap 12 coupled to the bottle body 11.

Wherein, the second gas port of the gas supply pipeline 20 is connected to the bottle body 11 through the bottle cap 12, and the gas supply pipeline 20 and the bottle cap 12 are non-detachable. The second liquid port of the liquid supply line 30 is connected to the bottle body 11 through the bottle cap 12, and the liquid supply line 30 and the bottle cap 12 are not detachable.

The gas supply pipeline 20 and the bottle cap 12 are of an undetachable structure, the liquid supply pipeline 30 and the bottle cap 12 are of an undetachable structure, after the bottle cap 12 is connected with the bottle body 11 in a matched mode, the liquid supply pipeline 30 can be achieved, the gas supply pipeline 20 is communicated with the bottle body 11, the liquid supply pipeline 30 and the gas supply pipeline 20 do not need to be arranged in the bottle cap 12 of the gas-water bottle 10 in a penetrating mode, the situation that a plurality of interfaces and a plurality of pipelines are connected in the connection process and are not prone to correspondence is avoided, the situation of connection errors is easy to generate, and normal use of the gas-water bottle 10 is guaranteed. In addition, the liquid supply pipeline 30, the gas supply pipeline 20 and the bottle cap 12 form a non-detachable structure, so that the situation that the pipeline is separated from the gas-water bottle 10 in the operation process can be avoided, and the operation safety is ensured.

In the present embodiment, the bottle cap 12 includes a cap body 121 and a sealing member 122 with a ring structure or an L-shaped structure disposed inside the cap body 121, and the sealing member 122 is disposed to improve the sealing performance between the bottle cap 12 and the bottle body 11. The sealing element 122 with a ring structure may be directly fixed on the lower surface of the cover 121.

The seal 122 of L-shaped configuration includes an annular seal body 1221 and an annular projection 1222 disposed on an end face of the seal body 1221. Wherein the annular protrusion 1222 has an inner diameter greater than that of the sealing body 1221, and the annular protrusion 1222 and the sealing body 1221 form a stepped structure inside the sealing member 122. A sealing member 122 of an L-shaped structure is provided on the lower surface of the cover 121, the annular protrusion 1222 is fixed to the lower surface of the cover 121, and the sealing body 1221 is extended outward from the cover 121.

Through the sealing member 122 that sets up L type structure, not only can strengthen the leakproofness of bottle lid 12 and bottle 11, can also make bottle lid 12 adaptation bottle 11 of inconstant internal diameter for bottle lid 12 can adapt to the bottle 11 of multiple bottleneck, thereby increases the application scope of gas water bottle 10.

Further, an embodiment of the present application also provides an endoscope including an endoscope main body, a controller 200, and the above-described gas-water supply system 100.

Wherein the gas supply line 20 and the liquid supply line 30 are both provided in the endoscope body. The controller 200 is communicatively coupled to the pressure sensor 42 on the gas supply line 20 to receive a pressure signal from the pressure sensor 42. The controller 200 is also connected to the gas pump 41 on the gas supply line 20 to control the amount of gas pumped by the gas pump 41 into the gas supply line 20 according to the pressure signal.

The first liquid port of the liquid supply pipeline 30 is arranged at the head end of the endoscope main body, when the head end of the endoscope main body extends into the body of a patient, the gas supply pipeline 20 leads gas into the gas-water bottle 10, so that the liquid in the gas-water bottle 10 enters the liquid supply pipeline 30, and the liquid supply pipeline 30 is used for flushing the lens of the head end module and the environment in the body of the human body.

For the gas-water supply system of the endoscope and the endoscope, the gas supply pipeline is provided with the pressure sensor, the gas pump and the one-way valve, and the pressure sensor is matched with the one-way valve to avoid the situation that the operation is affected smoothly due to the fact that the liquid pressure is larger than the human body safety threshold value due to overlarge gas pressure, so that the safety of the endoscope operation is effectively guaranteed. The pressure sensor, the controller and the air pump act together to timely regulate and control the gas pressure in the gas supply pipeline to be greater than the internal pressure of a human body and be smaller than a human body safety pressure threshold value, so that liquid in the liquid supply pipeline can smoothly enter the human body, and the human body cannot be injured. The check valve is matched with the pressure sensor, the gas pressure in the gas supply pipeline is too high, and when the pressure sensor loses the control function, the internal structure of the check valve acts to cut off the gas supply pipeline, so that the liquid with too high pressure is prevented from entering the inside of a human body, and the safety of the endoscopic surgery is effectively ensured.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. An endoscope gas-water supply system comprising:

a gas-water bottle;

a gas supply line including a first gas port and a second gas port; the first air port is used for air to enter, and the second air port is introduced into the air bottle and is positioned above the liquid level of the liquid in the air bottle;

the liquid supply pipeline comprises a first liquid port and a second liquid port, the first liquid port is used for being communicated with the body of a patient, and the second liquid port is communicated with the interior of the air bottle and is positioned below the liquid level of the liquid in the air bottle;

the pressure control unit comprises an air pump, a pressure sensor and a one-way valve which are arranged on the air supply pipeline; the pressure sensor is used for sensing a pressure signal of gas in the gas supply pipeline and is in communication connection with a controller of the endoscope; the controller is electrically connected with the air pump to control the amount of air pumped into the air supply pipeline by the air pump according to the pressure signal; the check valve is used for controlling the on-off of the gas supply pipeline and comprises a valve body and a piston piece, wherein two ends of the valve body are open, and the interior of the valve body is hollow; openings at two ends of the valve body are respectively an air inlet and an air outlet, and an internal cavity of the valve body comprises an installation space, an air inlet channel communicated with the air inlet and an air outlet channel communicated with the air outlet; the piston piece is blocked at the joint of the installation space and the air inlet channel, and the piston piece can move relative to the valve body to selectively separate from the blocking of the air inlet channel or block the air outlet channel, so that the one-way valve is opened or closed; when the gas pressure value in the gas supply pipeline is greater than the human body safety pressure threshold value, the one-way valve is closed, and the gas supply pipeline is disconnected; the pressure control unit further comprises a gas chamber fixed inside the gas supply line; the gas chamber is internally provided with a hollow cavity, an inlet and an outlet are respectively formed in the two ends of the gas chamber in the gas supply pipeline in the gas flowing direction, and the flowing direction of the gas in the gas supply pipeline is the axial direction of the gas supply pipeline; the inlet and the outlet are communicated with the cavity and communicated with the interior of the gas supply pipeline; the pressure sensor is disposed in the cavity at a distance from the inlet and the outlet in a radial direction of the gas supply line.

2. The endoscope air-water supply system according to claim 1, wherein the check valve is disposed between the air pump and the air-water bottle at a position closer to the air-water bottle than a position at which the air pump is disposed on the air supply line.

3. The air-water supply system for an endoscope of claim 1, wherein the piston member comprises a first piston and a second piston, the first piston being sealed at a connection of the installation space and the air inlet passage; the second piston is abutted against the first piston and is matched with the air outlet channel so as to be used for plugging the air outlet channel.

4. The air-water supply system for an endoscope of claim 3, wherein the check valve further comprises a micro spring, one end of the micro spring abuts against a surface of the first piston, and the other end abuts against an inner wall of the installation space.

5. The endoscope gas-water supply system according to claim 1, further comprising a filter and/or a sterilizer provided on the gas supply line, the filter and/or sterilizer being provided near the first port of the gas supply line.

6. The endoscope air-water supply system according to claim 1, wherein the air-water bottle comprises a bottle body and a bottle cap fittingly connected with the bottle body; a second gas port of the gas supply pipeline is communicated into the bottle body through the bottle cap, and the gas supply pipeline and the bottle cap are of an undetachable structure; and a second liquid port of the liquid supply pipeline is communicated into the bottle body through the bottle cap, and the liquid supply pipeline and the bottle cap are of a non-detachable structure.

7. The endoscope air-water supply system according to claim 6, wherein the bottle cap comprises a cap body and a sealing member of a ring structure or an L-shaped structure disposed inside the cap body; the sealing element with the L-shaped structure comprises an annular sealing main body and an annular bulge arranged on the end face of the sealing main body, and the inner diameter of the annular bulge is larger than that of the sealing main body; the sealing element of L shape structure set up in the lower surface of lid, annular arch with the lower surface of lid is fixed, sealed main part outwards stretches out the lid.

8. The endoscope gas-water supply system according to claim 1, wherein the gas chamber has an axisymmetric structure, the inlet and the outlet are on a central axis of the gas chamber, and the central axis of the gas chamber is collinear with a central axis of the gas supply line.

9. The endoscope air-water supply system according to claim 1, wherein a cross-sectional area of the inlet is smaller than a cross-sectional area of the outlet.

10. The endoscope air-water supply system according to claim 1, wherein the outer contour of the air chamber is an ellipsoid or a streamlined sphere which is gradually reduced from a middle position to both ends.

11. The endoscope gas-water supply system according to claim 1, wherein the pressure sensors are provided in pairs, the pressure sensors provided in pairs being arranged oppositely in a radial direction of the gas supply line.

12. The endoscope gas-water supply system according to claim 1, wherein the pressure sensor comprises a pressure sensing body and a circuit board electrically connected to the pressure sensing body, the pressure sensing body is used for sensing a pressure signal of the gas in the gas supply pipeline, the circuit board is fixed on an inner wall of the gas supply pipeline, the gas chamber is fixed on the circuit board, and the pressure sensing body is located in a cavity of the gas chamber.

13. The air-water supply system for an endoscope of claim 12, wherein the pressure sensor comprises two pressure sensing bodies each electrically connected to the circuit board, the two pressure sensing bodies being a main pressure sensing body and a sub-pressure sensing body, respectively; the main pressure sensing body is fixed on one side of the circuit board facing the air inlet direction, and the auxiliary pressure sensing body is fixed on one side of the circuit board departing from the air inlet direction.

14. The gas-water supply system for an endoscope according to claim 1, further comprising a temperature detection sensor disposed on said gas supply line for detecting a temperature of gas inside said gas supply line to obtain a gas temperature raw signal;

the temperature detection sensor is in communication connection with the controller to transmit the original gas temperature signal to the controller, so that the controller performs pressure compensation according to the original gas temperature signal and the pressure signal to obtain a pressure compensation value, and converts the pressure compensation value into a regulation pressure signal at a set temperature, so that the controller controls the amount of gas pumped into the gas supply pipeline by the gas pump according to the regulation pressure signal.

15. The endoscope gas-water supply system according to claim 14, wherein the controller comprises a gas pressure compensation module for performing pressure compensation on the gas temperature raw signal and the pressure signal to obtain a pressure compensation value, a parameter setting module for converting the pressure compensation value into a pressure setting value at a set temperature, and a pressure setting module for comparing the pressure setting value with a set safety pressure range value to adjust the pressure setting value to obtain the regulation pressure signal.

16. The endoscope air-water supply system according to claim 1, further comprising a heater for heating liquid in the air-water bottle or liquid in the liquid supply line;

the heater disposed on the liquid supply line includes:

the temperature detection module is used for detecting the temperature of the liquid in the liquid supply pipeline to obtain an original value of the liquid temperature;

the flow detection module is used for detecting the flow of the liquid in the liquid supply pipeline to obtain a liquid flow value;

the heating controller is electrically connected with the temperature detection module and the flow detection module so as to receive signals of the liquid temperature original value and the liquid flow value, obtain a temperature difference value according to the comparison of a set temperature value and the liquid temperature original value, and obtain a heating power value according to the temperature difference value and the liquid flow value;

and the heating module is electrically connected with the heating controller to receive the signal of the heating power value and heat the liquid in the liquid supply pipeline according to the signal of the heating power value.

17. The air-water supply system for an endoscope of claim 16, wherein the heating controller comprises a temperature setting module for setting the set temperature value and a heating power calculating module for obtaining a temperature difference value according to a comparison between the set temperature value and the original liquid temperature value and obtaining a heating power value according to the temperature difference value and the liquid flow value.

18. An endoscope comprising an endoscope body and a controller, wherein the endoscope further comprises a gas and water supply system of the endoscope according to any one of claims 1-17, the gas supply line and the liquid supply line being disposed in the endoscope body; the controller is in communication connection with a pressure sensor in the gas-water supply system to receive a pressure signal of the pressure sensor; the controller is electrically connected with an air pump in the air-water supply system so as to control the amount of air pumped into the air supply pipeline by the air pump according to the pressure signal.