Constant-temperature and constant-pressure pneumoperitoneum machine

Abstract

The utility model discloses a constant-temperature and constant-pressure pneumoperitoneum machine which comprises a shell, and an external air inlet pipeline, a first air tank, an abdominal cavity air conveying pipeline, a filter, a smoke exhaust air inlet pipeline and a control module are arranged on the shell. The control module is used for controlling opening or closing of the external air inlet pipeline, the abdominal cavity air conveying pipeline and the smoke exhaust air inlet pipeline. According to the constant-temperature and constant-pressure pneumoperitoneum machine, through the arrangement of a second pressure sensor and a third pressure sensor, the purposes of detecting the air pressure in the abdominal cavity in real time and supplementing air to the abdominal cavity in real time can be achieved, the air pressure in the abdominal cavity is kept stable, and therefore it is ensured that the pneumoperitoneum space can be well expanded to keep a good view; the heating state of the heating module can be detected through the arrangement of the first temperature sensor, and temperature feedback of switching of three different heating power modes is facilitated; temperature feedback is achieved through the second temperature sensor, the temperature of output gas is consistent with the temperature of the human body finally, and smooth operation is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumoperitoneum machine technical field, concretely relates to a constant temperature constant pressure pneumoperitoneum machine. BACKGROUND

[0002] The pneumoperitoneum machine is a special equipment for establishing and maintaining pneumoperitoneum in laparoscopic surgery, which injects carbon dioxide gas into the operation area of the patient to expand the pneumoperitoneum space and keep a good operation view, and is usually used with a disposable filter. The carbon dioxide gas output by the pneumoperitoneum machine is filtered by the filter and then sent into the abdominal cavity, and the smoke gas generated during the operation is filtered and then sent into the pneumoperitoneum machine for recycling. The filter serves as a filtering medium for the carbon dioxide gas of the pneumoperitoneum machine to solve the problem of impurities in the gas provided by the pneumoperitoneum machine and improve the purity of the gas entering the abdominal cavity of the human body. When the predetermined pressure is reached, the gas inlet is automatically stopped, and a certain amount of gas is maintained to keep the abdominal cavity in a predetermined pressure inflation state.

[0003] However, the temperature of the carbon dioxide gas delivered by the pneumoperitoneum machine is usually lower than the body temperature, and when a large amount of carbon dioxide gas is input into the abdominal cavity of the patient, a large amount of heat of the human body is absorbed, causing the patient to feel uncomfortable during the operation and increasing the probability of inducing chills and surgical incision infection, resulting in a longer postoperative recovery process of the patient and increasing the pain of the patient. Meanwhile, the carbon dioxide gas with a temperature lower than the body temperature may cause water vapor to condense on the lens of the laparoscope when entering the abdominal cavity, affecting the operation view of the main surgeon, and the main surgeon has to pull out the laparoscope lens to remove the water mist from time to time, resulting in a prolonged operation time. In addition, when the gas pressure in the abdominal cavity decreases during the operation (such as when the surgical instruments are inserted and removed, when the operation requires suction, or when the abdominal cavity is inflated due to the absorption or leakage of carbon dioxide gas, resulting in a decrease in the inflation pressure in the abdominal cavity), the pneumoperitoneum space cannot be well expanded to maintain a good view, affecting the operation. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problem of overcoming the deficiencies of the prior art and provides a constant temperature constant pressure pneumoperitoneum machine which can supplement gas to the abdominal cavity in real time, keep the gas pressure in the abdominal cavity stable, and make the temperature of the output gas consistent with the body temperature.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A constant temperature constant pressure pneumoperitoneum machine, comprising a shell, wherein an external gas inlet pipeline, a first gas tank, an abdominal cavity gas delivery pipeline, a filter, a smoke exhaust gas inlet pipeline, and a control module are arranged on the shell; the control module is used for controlling the opening or closing of the external gas inlet pipeline, the abdominal cavity gas delivery pipeline, and the smoke exhaust gas inlet pipeline.

[0007] One end of the external air inlet pipeline is connected with an external air source, and the other end is communicated with the first gas tank;

[0008] One end of the abdominal cavity gas conveying pipeline is communicated with the first gas tank, and the other end is communicated with the gas conveying passage of the filter; the abdominal cavity gas conveying pipeline comprises a heating module and a first temperature sensor; the heating module is used for heating the passing gas; and the first temperature sensor is used for detecting the temperature of the gas in the heating module;

[0009] One end of the smoke exhaust gas inlet pipeline is communicated with the smoke exhaust passage of the filter, and the other end is communicated with the heating module;

[0010] The external air inlet pipeline comprises an air inlet interface, a first pressure sensor and a pressure regulating valve group connected in sequence; the first pressure sensor is used for detecting the air pressure of the external air source; and the pressure regulating valve group is used for adjusting the air pressure of the external air source;

[0011] The abdominal cavity gas conveying pipeline is provided with a second pressure sensor and a second temperature sensor close to the filter; the second pressure sensor is used for detecting the air pressure of the gas outlet of the abdominal cavity gas conveying pipeline; and the second temperature sensor is used for detecting the temperature of the gas outlet of the abdominal cavity gas conveying pipeline;

[0012] The filter is provided with a third pressure sensor for detecting the air pressure in the abdominal cavity; the shell is provided with a mounting seat; and the filter is inserted into the mounting seat;

[0013] The first pressure sensor, the second pressure sensor, the third pressure sensor, the first temperature sensor and the second temperature sensor are electrically connected with the control module respectively.

[0014] As a further improvement of the above technical scheme: the pressure regulating valve group comprises a primary pressure regulating valve, a secondary pressure regulating valve and an air inlet electromagnetic valve connected in sequence; the primary pressure regulating valve and the secondary pressure regulating valve reduce the air pressure of the external air source twice; and the air inlet electromagnetic valve is used for opening or closing the air flow passage into the first gas tank.

[0015] As a further improvement of the above technical scheme: the abdominal cavity gas conveying pipeline comprises a proportional valve and a three-way valve; the proportional valve is arranged between the first gas tank and the heating module; the three-way valve is arranged between the heating module and the filter; and the three-way valve is provided with a classical gas conveying pipeline.

[0016] As a further improvement of the above technical solution: the classical gas conveying pipeline comprises a classical gas conveying port, a fourth pressure sensor and a third temperature sensor, the classical gas conveying port is communicated with the three-way valve and is arranged on the shell; the fourth pressure sensor is used for detecting the gas pressure of the classical gas conveying pipeline, and the third temperature sensor is used for detecting the temperature of the classical gas conveying pipeline; the fourth pressure sensor and the third temperature sensor are electrically connected with the control module respectively.

[0017] As a further improvement of the above technical solution: the smoke exhaust gas inlet pipeline comprises a second gas tank, a gas pump and a one-way valve connected in sequence, the second gas tank is communicated with the filter, the one-way valve is communicated with the heating module, at least two baffles are arranged in the second gas tank, and the baffles are provided with sound holes, and the diameters of the sound holes gradually increase from the gas inlet end to the gas outlet end.

[0018] As a further improvement of the above technical solution: the first gas tank is provided with a fifth pressure sensor for detecting the gas pressure in the first gas tank, and the first gas tank is further provided with an exhaust electromagnetic valve and a silencer connected in sequence, and the fifth pressure sensor is electrically connected with the control module.

[0019] As a further improvement of the above technical solution: further comprising a switch module and a man-machine interaction module arranged on the shell, and the switch module and the man-machine interaction module are electrically connected with the control module respectively.

[0020] As a further improvement of the above technical solution: the side wall of the mounting seat is provided with a liquid level sensing assembly and a locking assembly, the liquid level sensing assembly is used for sensing the liquid level in the filter, and the locking assembly is used for locking the filter in the mounting seat; the shell is provided with an unlocking assembly, and the unlocking assembly is used for unlocking the filter locked by the locking assembly.

[0021] As a further improvement of the above technical solution: the locking assembly comprises a bracket, a locking piece and a first elastic reset piece, the locking piece is hinged on the bracket and is provided with a locking hook; the filter is provided with a locking groove matched with the locking hook; the mounting seat is provided with an avoiding groove for avoiding the locking piece; and the first elastic reset piece is arranged on the bracket and is used for making the locking piece extend into the mounting seat and make the locking hook match with the locking groove.

[0022] As a further improvement of the above technical solution: the unlocking assembly includes an unlocking button, a button seat, a second elastic return member and an unlocking block; the button seat is connected with the shell; the unlocking button is arranged in the button seat and partially exposed outside the shell; the second elastic return member is arranged between the unlocking button and the button seat; a connecting column is arranged on the unlocking button, the connecting column passes through the button seat and is connected with the unlocking block; the bottom surface of the unlocking block abuts against the outer wall of the mounting seat, an unlocking inclined surface is arranged on the unlocking block, an unlocking column is arranged on the lock hook, and the unlocking inclined surface abuts against the unlocking column.

[0023] A temperature control method of a constant temperature and pressure insufflator, comprising the following steps:

[0024] A predetermined temperature required for gas output is set, the gas output temperature of the abdominal cavity gas delivery pipeline is detected by the second temperature sensor, it is judged whether the gas output temperature is equal to the predetermined temperature, if the gas output temperature is lower than the predetermined temperature, then the heating module is started; if the gas output temperature is higher than the predetermined temperature, then the abdominal cavity gas delivery is stopped;

[0025] The heating temperature of the heating module is set as a preheating temperature, and the current temperature of the gas in the heating module is detected by the first temperature sensor;

[0026] It is judged whether the current temperature reaches the preheating temperature, if the current temperature is lower than the preheating temperature by 5 degrees Celsius or more, then the heating power of the heating module is increased; if the current temperature is lower than the preheating temperature by 1 degree Celsius to 5 degrees Celsius, then the heating power of the heating module is kept; if the current temperature is lower than the preheating temperature by 1 degree Celsius or less, then the heating power of the heating module is reduced; if the current temperature is equal to the preheating temperature, then the heating module is closed.

[0027] As a further improvement of the above technical solution: when the current temperature is equal to the preheating temperature, if the gas output temperature is still lower than the predetermined temperature, then the preheating temperature is increased until the gas output temperature is equal to the predetermined temperature.

[0028] As a further improvement of the above technical solution: if the current temperature is lower than the preheating temperature by 1 degree Celsius or less, then a pulse signal with a corresponding duty cycle is output to the heating module, so that the current temperature is maintained within the preheating temperature ± 1 degree Celsius range.

[0029] Compared with the prior art, the utility model has the beneficial effects that:

[0030] The utility model discloses constant temperature constant pressure pneumoperitoneum machine and temperature control method thereof, through the setting of second pressure sensor, ensure that the pressure value of output gas meets the requirement, through the setting of third pressure sensor can real -time detection intra -abdominal pressure, real -time to the purpose of abdominal cavity air supply, keep intra -abdominal pressure stable to ensure that can good development pneumoperitoneum space keep good vision, through the setting of first temperature sensor can detect the heating state of heating module, and the temperature feedback of three different heating power mode switching is convenient, through the setting of second temperature sensor realizes temperature feedback, ensures that the temperature of output gas meets the requirement to realize temperature overheating and too low protection, finally make the temperature of output gas and human body temperature consistent, guarantee operation smoothly. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the gas circuit schematic diagram of constant temperature constant pressure pneumoperitoneum machine in the utility model.

[0032] Figure 2 It is the three -dimensional structure schematic diagram of constant temperature constant pressure pneumoperitoneum machine in the utility model.

[0033] Figure 3 It is the structure schematic diagram of first visual angle in constant temperature constant pressure pneumoperitoneum machine shell in the utility model.

[0034] Figure 4 It is the structure schematic diagram of second visual angle in constant temperature constant pressure pneumoperitoneum machine shell in the utility model.

[0035] Figure 5 It is the structure schematic diagram in the first gas tank and second gas tank of constant temperature constant pressure pneumoperitoneum machine in the utility model.

[0036] Figure 6 It is the structure schematic diagram of filter mounting mode in the utility model.

[0037] Figure 7 It is the structure schematic diagram of first visual angle of mounting seat in the utility model.

[0038] Figure 8 It is the structure schematic diagram of second visual angle of mounting seat in the utility model.

[0039] Figure 9 It is the structure schematic diagram of locking assembly in the utility model.

[0040] Figure 10 It is the structure schematic diagram of mounting seat in the utility model.

[0041] Figure 11 It is the explosion structure schematic diagram of unlocking assembly in the utility model.

[0042] Figure 12 It is the step schematic diagram of temperature control method of constant temperature constant pressure pneumoperitoneum machine in the utility model.

[0043] The numbers in the figure represent: 10, shell; 11, switch module; 12, human-computer interaction module; 13, mounting seat; 131, avoiding groove; 132, guide groove; 133, photoelectric sensor; 14, liquid level sensing assembly; 141, low liquid level sensor; 142, high liquid level sensor; 15, locking assembly; 151, bracket; 152, locking piece; 153, first elastic reset piece; 154, lock hook; 155, positioning rod; 156, abutting rod; 157, boosting end; 16, unlocking assembly; 161, unlocking button; 162, button seat; 163, second elastic reset piece; 164, unlocking block; 165, connecting column; 20, external air inlet pipeline; 21, air inlet interface; 22, first pressure sensor; 23, pressure regulating valve group; 231, primary pressure regulating valve; 232, secondary pressure regulating valve; 233, air inlet electromagnetic valve; 30, first gas tank; 31, fifth pressure sensor; 32, exhaust electromagnetic valve; 33, silencer; 40, abdominal cavity gas conveying pipeline; 41, heating module; 42, first temperature sensor; 43, second pressure sensor; 43, second temperature sensor; 45, proportional valve; 46, three-way valve; 50, filter; 51, third pressure sensor; 52, locking groove; 60, smoke exhaust air inlet pipeline; 61, second gas tank; 611, partition; 612, sound hole; 62, air pump; 63, one-way valve; 70, control module; 80, classical gas conveying pipeline; 81, classical gas conveying port; 82, fourth pressure sensor; 83, third temperature sensor; 90, external gas source. DETAILED DESCRIPTION

[0044] The utility model will be further explained in detail below in combination with the drawings and specific embodiments of the specification.

[0045] As shown in the utility model, unless the context clearly indicates otherwise, "one", "a", "one kind" and / or "the" do not specifically refer to the singular, and can also include the plural. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, "including" or "containing" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect.

[0046] Figures 1 to 11The utility model discloses a constant temperature constant pressure pneumoperitoneum machine, including the casing 10, be equipped with external air inlet pipeline 20, first gas tank 30, abdominal cavity gas pipeline 40, filter 50, exhaust gas inlet pipeline 60 and control module 70 on the casing 10, control module 70 is used to control the opening or close of external air inlet pipeline 20, abdominal cavity gas pipeline 40 and exhaust gas inlet pipeline 60,

[0047] One end of external air inlet pipeline 20 is connected with external gas source 90, and the other end is communicated with first gas tank 30,

[0048] One end of abdominal cavity gas pipeline 40 is communicated with first gas tank 30, and the other end is communicated with the gas inlet channel of filter 50, and abdominal cavity gas pipeline 40 includes heating module 41 and first temperature sensor 42, heating module 41 is used to heat the gas passing through, and first temperature sensor 42 is used to detect the temperature of the gas in heating module 41,

[0049] One end of exhaust gas inlet pipeline 60 is communicated with the exhaust channel of filter 50, and the other end is communicated with heating module 41,

[0050] External air inlet pipeline 20 includes air inlet interface 21, first pressure sensor 22 and pressure regulating valve group 23 connected in sequence, first pressure sensor 22 is used to detect the gas pressure of external gas source 90, and pressure regulating valve group 23 is used to adjust the gas pressure of external gas source 90,

[0051] Second pressure sensor 43 and second temperature sensor 44 are arranged at the position close to filter 50 of abdominal cavity gas pipeline 40, second pressure sensor 43 is used to detect the gas pressure of abdominal cavity gas pipeline 40, and second temperature sensor 44 is used to detect the temperature of the gas of abdominal cavity gas pipeline 40,

[0052] Third pressure sensor 51 for detecting the gas pressure in abdominal cavity is arranged on filter 50, and mounting seat 13 is arranged on casing 10, and filter 50 is inserted into mounting seat 13,

[0053] First pressure sensor 22, second pressure sensor 43, third pressure sensor 51, first temperature sensor 42 and second temperature sensor 44 are electrically connected with control module 70 respectively.

[0054] Specifically, in the initial state, air inlet interface 21 is communicated with external gas source 90, the gas is supplied into external air inlet pipeline 20 through external gas source 90, the gas pressure of external gas source 90 is detected through first pressure sensor 22, the gas pressure is adjusted to the predetermined pressure through pressure regulating valve group 23, and the gas after pressure regulation is stored into first gas tank 30,

[0055] When gas needs to be supplied to the abdominal cavity, the gas in the first gas tank 30 enters the abdominal cavity gas supply pipeline 40, the gas flowing through is heated by the heating module 41, the temperature of the heating module 41 is detected by the first temperature sensor 42, the pressure of the heated gas is detected by the second pressure sensor 43, the temperature of the heated gas is detected by the second temperature sensor 44, and when the gas pressure and temperature reach the predetermined values, the gas is communicated with the abdominal cavity through the gas supply channel of the filter 50; during the operation, the gas pressure in the abdominal cavity is detected in real time by the third pressure sensor 51, and when the gas pressure decreases, the abdominal cavity is supplied with gas in real time.

[0056] When the smoke in the abdominal cavity is discharged, the smoke gas is filtered through the smoke discharge channel of the filter 50 and enters the smoke discharge gas pipeline 60, and after being heated by the heating module 41, the smoke gas can be continuously sent into the abdominal cavity for recycling.

[0057] The constant-temperature and constant-pressure abdominal cavity machine, through the setting of the second pressure sensor 43, ensures that the pressure value of the output gas meets the requirements, through the setting of the third pressure sensor 51, the gas pressure in the abdominal cavity can be detected in real time, the purpose of supplying gas to the abdominal cavity in real time is achieved, the gas pressure in the abdominal cavity is kept stable, so that the abdominal cavity space can be well expanded to maintain a good visual field; through the setting of the first temperature sensor 42, the heating state of the heating module 41 can be detected, through the setting of the second temperature sensor 44, temperature feedback is realized, and the temperature of the output gas meets the requirements, so that temperature overheating and overlow protection are realized, and finally the temperature of the output gas is consistent with the body temperature, ensuring the smooth progress of the operation.

[0058] In the embodiment, the pressure regulating valve group 23 includes a first pressure regulating valve 231, a second pressure regulating valve 232 and an inlet electromagnetic valve 233 connected in sequence, the first pressure regulating valve 231 and the second pressure regulating valve 232 reduce the gas pressure of the external gas source 90 twice, and the inlet electromagnetic valve 233 is used to open or close the gas flow channel into the first gas tank 30. Specifically, the gas of the external gas source 90 is reduced in pressure by the two pressure regulating valves in sequence, and the secondary pressure reduction can improve the reliability of the regulation and control, so that after the gas pressure is reduced to the predetermined range, the inlet electromagnetic valve 233 is opened to deliver the reduced pressure gas to the first gas tank 30.

[0059] In this embodiment, the abdominal cavity gas delivery pipeline 40 includes a proportional valve 45 and a three-way valve 46, the proportional valve 45 is arranged between the first gas tank 30 and the heating module 41, the three-way valve 46 is arranged between the heating module 41 and the filter 50, and the three-way valve 46 is provided with a classic gas delivery pipeline 80. Specifically, the gas in the first gas tank 30 is delivered to the proportional valve 45, the proportional valve 45 adjusts the flow and pressure, and then the gas is delivered to the heating module 41. The heated gas is communicated with the three-way valve 46, one outlet of the three-way valve 46 is communicated with the gas delivery channel of the filter 50, and the other outlet is communicated with the classic gas delivery pipeline 80. Through the setting of the classic gas delivery pipeline 80, the gas can not pass through the filter 50 on the machine, and the adaptability and use scene can be increased by adapting to the catheter provided with a filtering device in the market. The heating module 41 is a prior art, and the specific structure is not described in detail.

[0060] In this embodiment, the classic gas delivery pipeline 80 includes a classic gas delivery port 81, a fourth pressure sensor 82 and a third temperature sensor 83, the classic gas delivery port 81 is communicated with the three-way valve 46 and arranged on the shell 10; the fourth pressure sensor 82 is used for detecting the gas pressure of the classic gas delivery pipeline 80, and the third temperature sensor 83 is used for detecting the temperature of the gas delivered by the classic gas delivery pipeline 80. The fourth pressure sensor 82 and the third temperature sensor 83 are electrically connected with the control module 70 respectively. Specifically, when the classic gas delivery pipeline 80 is used for gas delivery, the classic gas delivery port 81 is connected with an external catheter, the fourth pressure sensor 82 detects the gas pressure, and the third temperature sensor 83 detects the gas temperature, so as to ensure that the pressure and temperature meet the requirements, provide feedback, and achieve the purpose of constant temperature and constant pressure.

[0061] In this embodiment, the smoke exhaust and air inlet pipeline 60 includes a second gas tank 61, a gas pump 62 and a one-way valve 63 connected in sequence, the second gas tank 61 is communicated with the filter 50, and the one-way valve 63 is communicated with the heating module 41. The second gas tank 61 is provided with at least two baffles 611, the baffles 611 are provided with sound reduction holes 612, and the diameters of the sound reduction holes 612 gradually increase from the gas inlet end to the gas outlet end. Specifically, the flue gas is filtered by the filter 50 and then enters the second gas tank 61, the baffles 611 divide the second gas tank 61 into multiple chambers, and the sound reduction holes 612 of the baffles 611 can reduce the noise generated by the instantaneous entry of the gas.

[0062] In this embodiment, the first gas tank 30 is provided with a fifth pressure sensor 31 for detecting the gas pressure in the first gas tank 30, and the first gas tank 30 is further provided with an exhaust electromagnetic valve 32 and a silencer 33 connected in sequence, and the fifth pressure sensor 31 is electrically connected with the control module 70. Specifically, the gas pressure in the first gas tank 30 is detected by the fifth pressure sensor 31, and if the gas pressure is high, the exhaust electromagnetic valve 32 can be used for exhaust, and the silencer 33 can be used for eliminating the exhaust noise. The second gas tank 61 is integrally formed with the main body of the first gas tank 30, and the second gas tank 61 is located above the first gas tank 30.

[0063] In the embodiment, the switch module 11 and the human-computer interaction module 12 are arranged on the shell 10, and the switch module 11 and the human-computer interaction module 12 are electrically connected with the control module 70. Specifically, all the control valve bodies are electrically connected with the control module 70, the second pressure sensor 43, the second temperature sensor 44, the fourth pressure sensor 82 and the third temperature sensor 83 can be integrated on the control module 70, the control module 70 can be selected as a single-chip microcomputer, and the human-computer interaction module 12 is a touch screen, which is electrically connected with the single-chip microcomputer through the touch screen, thereby facilitating control.

[0064] In the embodiment, the side wall of the mounting seat 13 is provided with a liquid level sensing assembly 14 and a locking assembly 15, the liquid level sensing assembly 14 is used for sensing the liquid level in the filter 50, and the locking assembly 15 is used for locking the filter 50 in the mounting seat 13; the shell 10 is provided with an unlocking assembly 16, which is used for unlocking the filter 50 from the locking assembly 15. Specifically, in use, the filter 50 is connected with the mounting seat 13 on the shell 10 in a plug-in manner, the filter 50 is locked in the mounting seat 13 through the locking assembly 15, and the liquid level in the filter 50 is sensed through the liquid level sensing assembly 14, so as to facilitate judging the timing of replacing the filter 50 and avoiding affecting the operation due to excessive liquid accumulation; when replacement is needed, the filter 50 is unlocked through the unlocking assembly 16, so as to be pulled out in time for replacement, and then a new filter 50 is inserted and locked again through the locking assembly 15, so that the disassembly and assembly operation is simple and convenient, the replacement efficiency is improved, and the installation and fixation reliability is high.

[0065] In the embodiment, the locking assembly 15 includes a bracket 151, a locking piece 152 and a first elastic reset piece 153, the locking piece 152 is hinged to the bracket 151 and is provided with a locking hook 154; the filter 50 is provided with a locking groove 52 matched with the locking hook 154; the mounting seat 13 is provided with an avoiding groove 131 for avoiding the locking piece 152; the first elastic reset piece 153 is arranged on the bracket 151 and is used for making the locking piece 152 extend into the mounting seat 13 and making the locking hook 154 match with the locking groove 52. Specifically, the bracket 151 is installed on the outer wall of the mounting seat 13 through screws or other fasteners, the locking piece 152 is installed on the bracket 151 through a rotating shaft, the locking piece 152 is made to extend into the avoiding groove 131 through the first elastic reset piece 153, the locking hook 154 is matched with the locking groove 52, the filter 50 is prevented from loosening and being pulled out, so as to keep the locking state of the filter 50, and the structure is simple and convenient to process and assemble.

[0066] In the embodiment, the first elastic reset member 153 is preferably a torsion spring, the bracket 151 is provided with a positioning rod 155 and an abutting rod 156, the torsion spring is sleeved on the positioning rod 155, one end of the torsion spring abuts against the abutting rod 156, and the other end of the torsion spring abuts against the back surface of the lock hook 154. Specifically, the reset reliability of the torsion spring is higher, the torsion spring is convenient to install, and the cost of the torsion spring is lower; the back surface of the lock hook 154 is further provided with a groove for accommodating the torsion spring, so that the torsion spring is prevented from sliding out of the contact surface and losing effectiveness.

[0067] In the embodiment, the end of the locking member 152 away from the lock hook 154 is provided with a boosting end 157. Specifically, the boosting end 157 is preferably arranged at a right angle with the body of the locking member 152, when the unlocking assembly 16 is unlocked, the locking member 152 rotates, the lock hook 154 is disengaged from the locking groove 52, and the boosting end 157 moves into the mounting seat 13 at the same time, so that the filter 50 is conveniently pushed out, further facilitating disassembly, and improving the updating efficiency.

[0068] In the embodiment, the unlocking assembly 16 includes an unlocking button 161, a button seat 162, a second elastic reset member 163, and an unlocking block 164; the button seat 162 is connected with the shell 10; the unlocking button 161 is arranged in the button seat 162 and partially exposed outside the shell 10; the second elastic reset member 163 is arranged between the unlocking button 161 and the button seat 162; the unlocking button 161 is provided with a connecting column 165, the connecting column 165 passes through the button seat 162 and is connected with the unlocking block 164; the bottom surface of the unlocking block 164 abuts against the outer wall of the mounting seat 13, the unlocking block 164 is provided with an unlocking inclined surface, the lock hook 154 is provided with an unlocking column, and the unlocking inclined surface abuts against the unlocking column. Specifically, the connecting column 165 of the unlocking button 161 abuts against the unlocking block 164 and is connected through a screw or other fastener, so that the connecting column 165 can drive the unlocking block 164 to move; when the filter 50 needs to be replaced, the unlocking button 161 on the surface of the shell 10 is pressed, so that the second elastic reset member 163 is compressed to move into the button seat 162, the connecting column 165 of the unlocking button 161 drives the unlocking block 164 to move inward, the unlocking inclined surface lifts the unlocking column, the lock hook 154 is disengaged from the locking groove 52, and unlocking is realized; the unlocking is realized by lifting the lock hook 154, so that the unlocking force is horizontally transmitted to the lock hook 154, and the reliability of unlocking can be improved. Preferably, the unlocking column is provided with a rolling bearing. Specifically, the unlocking process can be smoother through the cooperation of the unlocking inclined surface and the rolling bearing.

[0069] In the embodiment, the outer wall of the mounting seat 13 is provided with a guide groove 132, and the bottom surface of the unlocking block 164 is located in the guide groove 132. Specifically, the unlocking block 164 is limited and guided through the guide groove 132, and the unlocking effect is guaranteed.

[0070] In the embodiment, the unlocking block 164 is provided with two unlocking inclined surfaces, and a clearance for avoiding the locking hook 154 is arranged between the two unlocking inclined surfaces. Specifically, the two unlocking inclined surfaces are arranged to make the force more uniform, thereby further improving the reliability.

[0071] In the embodiment, the liquid level sensing assembly 14 includes a low liquid level sensor 141 and a high liquid level sensor 142. The low liquid level sensor 141 is arranged below the mounting seat 13, and the high liquid level sensor 142 is arranged at the side of the mounting seat 13. Specifically, the liquid level sensors are infrared sensors, each of which has a transmitting terminal and a receiving terminal. The infrared rays are transmitted through the filter 50 by the transmitting terminal, and the infrared rays reflected back are received by the receiving terminal. When there is no liquid in the filter 50, the reflected intensity is strong, and when there is liquid in the filter 50, the received reflected intensity is weak. Whether there is liquid in the filter 50 is determined according to the intensity difference. The high and low liquid levels are detected by the two liquid level sensors respectively, so that the liquid accumulation condition of the filter 50 can be controlled in real time.

[0072] In the embodiment, the mounting seat 13 is provided with a photoelectric sensor 133 for sensing whether the filter 50 has been inserted. Specifically, whether the filter 50 has been inserted can be sensed by the photoelectric sensor 133, thereby facilitating the user to check the machine state.

[0073] As shown in Figure 12 A temperature control method of a constant temperature and pressure insufflator, comprising the following steps:

[0074] S1: setting a predetermined temperature required for gas output, detecting the gas output temperature of the abdominal cavity gas delivery pipeline 40 by the second temperature sensor 44, judging whether the gas output temperature is equal to the predetermined temperature, if the gas output temperature is lower than the predetermined temperature, then starting the heating module 41; if the gas output temperature is higher than the predetermined temperature by 1 degree Celsius or more, then stopping the abdominal cavity gas delivery, realizing over-temperature protection;

[0075] S2: setting the heating temperature of the heating module 41 as a pre-heating temperature, and detecting the current temperature of the gas in the heating module 41 by the first temperature sensor 42;

[0076] S3: judging whether the current temperature reaches the pre-heating temperature, if the current temperature is lower than the pre-heating temperature by 5 degrees Celsius or more, then increasing the heating power of the heating module 41, i.e. starting a high-power heating mode, realizing rapid heating; if the current temperature is lower than the pre-heating temperature by 1 degree Celsius to 5 degrees Celsius, then keeping the heating power of the heating module 41, i.e. starting a normal heating mode; if the current temperature is lower than the pre-heating temperature by 1 degree Celsius or less, then reducing the heating power of the heating module 41, i.e. starting a low-power heating mode, avoiding over-temperature of the gas; if the current temperature is equal to the pre-heating temperature, then closing the heating module 41.

[0077] The temperature control method, through the setting of the first temperature sensor 42, facilitates the temperature feedback of the switching of the three different heating power modes, through the second temperature sensor 44, the output temperature feedback and the overheat protection, through twice temperature detection, ensure that the finally output gas meets the requirements, guarantee the smooth operation of the operation.

[0078] In the embodiment, when the current temperature is equal to the preheating temperature, if the output gas temperature is still lower than the predetermined temperature, the preheating temperature is increased until the output gas temperature is equal to the predetermined temperature.

[0079] In the embodiment, if the current temperature is lower than the preheating temperature by 1 degree Celsius or less, the corresponding duty cycle pulse signal is output to the heating module 41, so that the current temperature is maintained within the preheating temperature ± 1 degree Celsius range, and the reliability is high.

[0080] Although the utility model has disclosed as above with preferred embodiments, however, it is not used to limit the utility model. Any skilled person in the art, without departing from the technical scheme range of the utility model, can utilize the disclosed technical content to make many possible changes and modifications to the technical scheme of the utility model, or modify equivalent embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model should fall within the protection scope of the technical scheme of the utility model.

Claims

1. A constant temperature and constant pressure pneumoperitoneum machine, characterized in that: The device includes a housing (10), on which are provided an external air inlet pipe (20), a first air tank (30), an abdominal air delivery pipe (40), a filter (50), an exhaust air inlet pipe (60), and a control module (70); the control module (70) is used to control the opening or closing of the external air inlet pipe (20), the abdominal air delivery pipe (40), and the exhaust air inlet pipe (60); One end of the external air intake pipe (20) is connected to an external air source (90), and the other end is connected to the first air tank (30); One end of the abdominal gas delivery pipeline (40) is connected to the first gas tank (30), and the other end is connected to the gas delivery channel of the filter (50); the abdominal gas delivery pipeline (40) includes a heating module (41) and a first temperature sensor (42), the heating module (41) is used to heat the passing gas, and the first temperature sensor (42) is used to detect the temperature of the gas in the heating module (41); One end of the exhaust inlet pipe (60) is connected to the exhaust channel of the filter (50), and the other end is connected to the heating module (41); The external air intake pipe (20) includes an air intake port (21), a first pressure sensor (22) and a pressure regulating valve group (23) connected in sequence. The first pressure sensor (22) is used to detect the air pressure of the external air source (90), and the pressure regulating valve group (23) is used to regulate the air pressure entering the external air source (90). The abdominal gas delivery line (40) is provided with a second pressure sensor (43) and a second temperature sensor (44) near the filter (50). The second pressure sensor (43) is used to detect the gas pressure of the gas exiting the abdominal gas delivery line (40), and the second temperature sensor (44) is used to detect the temperature of the gas exiting the abdominal gas delivery line (40). The filter (50) is provided with a third pressure sensor (51) for detecting intra-abdominal air pressure; the housing (10) is provided with a mounting base (13), and the filter (50) is inserted into the mounting base (13); The first pressure sensor (22), the second pressure sensor (43), the third pressure sensor (51), the first temperature sensor (42), and the second temperature sensor (44) are all electrically connected to the control module (70).

2. The constant temperature and constant pressure pneumoperitoneum machine according to claim 1, characterized in that: The pressure regulating valve group (23) includes a first-stage pressure regulating valve (231), a second-stage pressure regulating valve (232), and an intake solenoid valve (233) connected in sequence. The first-stage pressure regulating valve (231) and the second-stage pressure regulating valve (232) reduce the pressure of the external air source (90) twice. The intake solenoid valve (233) is used to open or close the airflow channel into the first air tank (30).

3. The constant temperature and constant pressure pneumoperitoneum machine according to claim 1, characterized in that: The abdominal gas delivery pipeline (40) includes a proportional valve (45) and a three-way valve (46). The proportional valve (45) is located between the first gas tank (30) and the heating module (41). The three-way valve (46) is located between the heating module (41) and the filter (50). The three-way valve (46) is equipped with a classic gas delivery pipeline (80).

4. The constant temperature and constant pressure pneumoperitoneum machine according to claim 3, characterized in that: The classic gas pipeline (80) includes a classic gas inlet (81), a fourth pressure sensor (82), and a third temperature sensor (83). The classic gas inlet (81) is connected to the three-way valve (46) and is located on the housing (10). The fourth pressure sensor (82) is used to detect the gas pressure of the gas outlet of the classic gas pipeline (80), and the third temperature sensor (83) is used to detect the temperature of the gas outlet of the classic gas pipeline (80). The fourth pressure sensor (82) and the third temperature sensor (83) are both electrically connected to the control module (70).

5. The constant temperature and constant pressure pneumoperitoneum machine according to claim 1, characterized in that: The exhaust inlet pipe (60) includes a second gas tank (61), an air pump (62), and a one-way valve (63) connected in sequence. The second gas tank (61) is connected to the filter (50), and the one-way valve (63) is connected to the heating module (41). The second gas tank (61) is provided with at least two partitions (611), and the partitions (611) are provided with silencers (612). The diameter of the silencers (612) gradually increases from the air inlet end to the air outlet end.

6. The constant temperature and constant pressure pneumoperitoneum machine according to claim 1, characterized in that: The first gas tank (30) is provided with a fifth pressure sensor (31) for detecting the gas pressure inside the first gas tank (30). The first gas tank (30) is also provided with an exhaust solenoid valve (32) and a muffler (33) connected in sequence. The fifth pressure sensor (31) is electrically connected to the control module (70).

7. The constant temperature and constant pressure pneumoperitoneum machine according to claim 1, characterized in that: It also includes a switch module (11) and a human-machine interaction module (12) disposed on the housing (10), and the switch module (11) and the human-machine interaction module (12) are electrically connected to the control module (70) respectively.

8. The constant temperature and constant pressure pneumoperitoneum machine according to any one of claims 1 to 7, characterized in that: The mounting base (13) is provided with a liquid level sensing component (14) and a locking component (15) on its side wall. The liquid level sensing component (14) is used to sense the liquid level in the filter (50), and the locking component (15) is used to lock the filter (50) in the mounting base (13). The housing (10) is provided with an unlocking component (16), which is used to release the locking component (15) from locking the filter (50).

9. The constant temperature and constant pressure pneumoperitoneum machine according to claim 8, characterized in that: The locking assembly (15) includes a bracket (151), a locking member (152), and a first elastic reset member (153). The locking member (152) is hinged to the bracket (151) and is provided with a locking hook (154). The filter (50) is provided with a locking groove (52) that can cooperate with the locking hook (154). The mounting base (13) is provided with a clearance groove (131) for avoiding the locking member (152). The first elastic reset member (153) is provided on the bracket (151) and is used to allow the locking member (152) to extend into the mounting base (13) so that the locking hook (154) cooperates with the locking groove (52).

10. The constant temperature and constant pressure pneumoperitoneum machine according to claim 9, characterized in that: The unlocking component (16) includes an unlocking button (161), a button base (162), a second elastic reset member (163), and an unlocking block (164); the button base (162) is connected to the housing (10); the unlocking button (161) is located inside the button base (162) and partially exposed outside the housing (10); the second elastic reset member (163) is located between the unlocking button (161) and the button base (162); the unlocking button (161) is provided with a connecting post (165), the connecting post (165) passes through the button base (162) and is connected to the unlocking block (164); the bottom surface of the unlocking block (164) abuts against the outer wall of the mounting base (13), the unlocking block (164) is provided with an unlocking ramp, the lock hook (154) is provided with an unlocking post, and the unlocking ramp abuts against the unlocking post.

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