Ventilation device of anesthesia respirator

Abstract

The ventilation device comprises a base, connecting pipes are arranged on the two sides of the base and used for connecting an anesthesia air pipe and an oxygen supply pipe, a mask air inlet pipe is arranged at the upper end of the base, one end of the mask air inlet pipe extends into the base, and the other end of the mask air inlet pipe extends into the base. Transmission cavities are formed in the two sides of the middle position in the base, first pressing blocks are arranged in the transmission cavities, second pressing blocks are arranged on one sides of the first pressing blocks, and first guide rods are fixedly adhered to one sides of the interiors of the transmission cavities. According to the ventilation device of the anesthesia respirator, the mask air inlet pipe can be quickly disassembled and assembled, and precious treatment time can be gained for patients. Meanwhile, the risk of loosening or accidental falling possibly occurring in a traditional mode is avoided, the continuous stability and reliability of the ventilation device in the operation or intensive care process are ensured, and the risk that breathing of a patient is hindered due to equipment failures is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of anesthesia ventilators, in particular to a ventilation device of anesthesia ventilators. Background Art

[0002] Anesthesia ventilator is a common medical device in surgery and intensive care. Its core function is to assist or replace the patient's spontaneous breathing to maintain blood oxygen saturation and normal discharge of carbon dioxide, so that the patient can maintain a stable physiological state. It is widely used in surgeries that require general anesthesia, because general anesthesia can suppress the patient's respiratory center and make it impossible for them to breathe autonomously. In this case, the anesthesia ventilator can provide normal respiratory airflow, ensure the patient's airway is unobstructed, and adjust the composition of the respiratory gas according to the needs of the surgery and the patient, including oxygen, anesthetic gas and other gases. The ventilation device is a supporting equipment designed specifically for the anesthesia ventilator. Its core function is to effectively deliver the gas processed by the anesthesia ventilator to the patient's lungs to ensure the patient's airway is unobstructed.

[0003] For example, the Chinese authorized patent "A breathing ventilation device for cardiopulmonary protection during anesthesia" with announcement number CN221491136U includes a mask inlet pipe, a ventilation pipe is sleeved on the outer side of one end of the mask inlet pipe, an anesthetic trachea is connected through the side wall of the lower end of the ventilation pipe, an oxygen supply pipe is sleeved on the inner side of the lower end of the ventilation pipe, the ventilation pipe includes a connecting pipe, a first sealing assembly, a detection assembly and a second sealing assembly, a first sealing assembly is fixedly provided on the middle part of the inner side of the connecting pipe, one end of the mask inlet pipe passes through the top of the connecting pipe, one end of the mask inlet pipe is inserted on the inner side of the first sealing assembly, a detection assembly is fixedly provided on the top edge of the connecting pipe, the detection assembly is sleeved on the outer side of the mask inlet pipe, a second sealing assembly is fixedly provided on the bottom of the connecting pipe, and one end of the oxygen supply pipe passes through the second sealing assembly.

[0004] Although the above-mentioned prior art makes it easy for operators to visually observe whether there is an air leak, the connection between the mask air inlet pipe and the ventilation pipe of the ventilation device is relatively inconvenient. In emergency treatment, if the connection process of the mask air inlet pipe is too cumbersome or time-consuming, it will delay the patient's treatment time and increase the patient's risk and discomfort. At the same time, the device lacks early warning of air leaks. If the air leak is not discovered in time, it will easily lead to a reduction in the amount of effective gas delivered to the patient by the ventilation device, which greatly reduces the patient's ventilation efficiency. Therefore, it does not meet existing needs. In this regard, we propose a ventilation device for an anesthesia ventilator. Summary of the invention

[0005] The object of the present invention is to provide a ventilation device for an anesthesia ventilator to solve the problems in the above background technology that the connection between the ventilation device and the mask air inlet pipe is not convenient enough, affecting the rescue efficiency and lacking effective air leakage warning.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ventilation device of an anesthesia breathing machine, comprising a base, connecting pipes are arranged on both sides of the base, and the connecting pipes are used to connect the anesthesia trachea and the oxygen supply pipe, a mask air inlet pipe is arranged on the upper end of the base, and one end of the mask air inlet pipe extends to the inside of the base, a transmission cavity is opened on both sides at the middle position inside the base, a first pressing block is arranged inside the transmission cavity, a second pressing block is arranged on one side of the first pressing block, a first guide rod is adhered and fixed to one side of the transmission cavity, a second guide rod is adhered and fixed to the upper end of the transmission cavity, the first guide rod and the first pressing block are connected to the second guide rod and the second pressing block by connecting blocks, and the connecting blocks are slidably matched with the first guide rod and the second guide rod, a third guide rod is adhered and fixed to the front sides of both sides of the base, a lifting plate is arranged between the third guide rods, the third guide rod passes through the lifting plate, and the third guide rod is slidably matched with the lifting plate.

[0007] Preferably, an annular cavity is opened on the upper side of the interior of the base, a trigger cavity is opened on one side of the upper end of the annular cavity, a pressure plate is slidably provided on one side of the upper end of the interior of the annular cavity, a trigger rod is adhered and fixed to the upper end of the pressure plate, and one end of the trigger rod passes through and extends into the interior of the trigger cavity, a third return spring is sleeved on the outside of one end of the trigger rod located inside the annular cavity, one end of the third return spring is connected to the annular cavity, and the other end of the third return spring is connected to the pressure plate.

[0008] Preferably, a pressure sensor is installed at the upper end of the trigger chamber, a controller is provided at the upper end of the trigger chamber, and the input end of the controller is electrically connected to the output end of the pressure sensor, an alarm is installed on one side of the upper end of the base, and the input end of the alarm is electrically connected to the output end of the controller.

[0009] Preferably, a first return spring is sleeved on the outside of the first guide rod, one end of the first return spring is connected to the connecting block, and the other end of the first return spring is connected to the transmission chamber.

[0010] Preferably, a second return spring is sleeved on the outside of the second guide rod, one end of the second return spring is connected to the connecting block, and the other end of the second return spring is connected to the transmission chamber.

[0011] Preferably, a connecting plate is provided in front of the base, and a pull rod is bonded and fixed to the front end of the first pressure block, one end of the pull rod passes through and extends to the outside of the transmission cavity, and the pull rod slides with the transmission cavity, and the end of the pull rod located outside the transmission cavity is bonded and fixed to the connecting plate.

[0012] Preferably, the mask air inlet pipe is provided with limiting grooves on both sides of one end inside the base, and the inner side of the second pressure block is adhered and fixed with limiting blocks, one end of the limiting block passes through and extends to the outside of the transmission cavity, and the limiting block is adapted to the limiting groove.

[0013] Preferably, a fourth return spring is sleeved on the lower side of the outer portion of the third guide rod, one end of the fourth return spring is connected to the lifting plate, and the other end of the fourth return spring is connected to the base.

[0014] Preferably, a sliding rod is adhesively fixed to the inside of the lifting plate, and both ends of the sliding rod extend to the outside of the lifting plate, a pull plate is adhesively fixed to the upper end of the sliding rod, and an arc block is adhesively fixed to the lower end of the sliding rod, and a clamping groove is opened directly below the arc block.

[0015] Preferably, a heating block is provided at the lower end of the base.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides transmission cavities on both sides of the middle of the base. When the medical staff pulls the connecting plate, the connecting plate will drive the pull rod to move the first pressure block, so that the first pressure block can contact the limit of the second pressure block. Under the elastic pulling of the second return spring, the second pressure block will drive the limit block to move out from the inside of the limit groove, so that it can be convenient to contact and fix the mask air inlet pipe. Conversely, after the mask air inlet pipe enters the base, the elastic action of the first return spring can make the first pressure block squeeze and push the second moving block, so that the limit block is stuck in the inside of the limit groove, so that the mask air inlet pipe can be quickly disassembled and assembled, greatly shortening the operation time. Especially in emergency situations, this rapid response capability is particularly important, which can gain precious treatment time for patients. The simple and effective mechanical structure realizes a stable connection, avoids the risk of loosening or accidental falling off that may occur in the traditional method, ensures the continuous stability and reliability of the ventilation device during surgery or intensive care, and reduces the risk of patient breathing obstruction due to equipment failure.

[0018] 2. The present invention opens an annular cavity on the upper side of the interior of the base. After the mask air inlet pipe is inserted into the base, it can be sealed by the rubber pad on the inner wall of the upper end of the base. Once leakage occurs, gas will flow into the interior of the annular cavity. The influx of gas will increase the internal air pressure, thereby lifting the pressure plate. The pressure plate will drive the trigger rod to squeeze the pressure sensor. After the pressure sensor detects the pressure, it will send an electrical signal to the controller. After the controller processes the pressure, it will start the alarm, causing the alarm to sound an alarm. The triggering of the alarm sound, as a clear and urgent warning signal, can immediately alert medical staff, prompting them to immediately interrupt the current task and focus on identifying and handling the leakage problem. This alarm mechanism not only ensures that the leakage can be quickly detected, but also effectively avoids the risk of being ignored in a complex medical environment through its highly recognizable sound characteristics, thereby maximizing the safety and treatment effect of the patient.

[0019] 3. The present invention provides a third guide rod on both sides of the base, and the outer sleeve of the third guide rod is provided with a fourth return spring. When in use, the anesthesia trachea and the oxygen supply tube can be connected to the connecting tubes on both sides of the base, and the elastic action of the fourth return spring can make the lifting plate move downward. The downward movement of the lifting plate will drive the arc plate to push the anesthesia trachea and the oxygen supply tube, and after cooperating with the clamping groove, the anesthesia trachea and the oxygen supply tube can be clamped and fixed, which effectively prevents the pipeline from accidentally falling off due to external force or patient movement during use, ensures the continuity and stability of the ventilation process, and reduces the risk of treatment interruption caused by loose pipeline. The automatic adjustment effect of the fourth return spring enables the pipeline to be easily clamped in place, which greatly simplifies the operation process and saves valuable time. Especially in emergency treatment, this quick connection capability is particularly important. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a front view schematic diagram of the internal structure of the present invention;

[0022] Figure 3 It is a schematic side view of the internal structure of the base of the present invention;

[0023] Figure 4 It is a top view schematic diagram of the internal structure of the transmission cavity of the present invention;

[0024] Figure 5 For the present invention Figure 2 A partial enlarged view of the middle A area;

[0025] Figure 6 For the present invention Figure 3 A partial enlarged view of the middle B area;

[0026] Figure 7 For the present invention Figure 4 A partial enlarged view of area C in the middle.

[0027] In the figure: 1. base; 2. mask air inlet pipe; 3. connecting pipe; 4. transmission chamber; 5. first pressure block; 6. second pressure block; 7. first guide rod; 8. first return spring; 9. second guide rod; 10. second return spring; 11. connecting block; 12. pull rod; 13. connecting pull plate; 14. limit block; 15. limit groove; 16. annular cavity; 17. pressure plate; 18. trigger rod; 19. third return spring; 20. trigger chamber; 21. pressure sensor; 22. controller; 23. alarm; 24. third guide rod; 25. fourth return spring; 26. lifting plate; 27. arc block; 28. slide rod; 29. ​​pull plate; 30. clamping groove; 31. heating block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figure 1-7 , an embodiment of the present invention: a ventilation device of an anesthesia breathing machine, comprising a base 1, connecting pipes 3 are arranged on both sides of the base 1, and the connecting pipes 3 are used to connect the anesthesia trachea and the oxygen supply pipe, a mask air inlet pipe 2 is arranged on the upper end of the base 1, and one end of the mask air inlet pipe 2 extends to the inside of the base 1, and a transmission chamber 4 is opened on both sides of the middle position inside the base 1, and a first pressing block 5 is arranged inside the transmission chamber 4, and a second pressing block 6 is arranged on one side of the first pressing block 5, and a first guide rod 7 is adhered and fixed to one side of the transmission chamber 4, and a second guide rod 9 is adhered and fixed to the upper end of the transmission chamber 4, and the first guide rod 7 and the first pressing block 5, the second guide rod 9 and the second pressing block 6 are all connected through a connecting block 11, and the connecting block 11 and the first guide rod 7 and the second guide rod 9 are all slidably matched, and the front sides of both sides of the base 1 are adhered and fixed with third guide rods 24, and a lifting plate 26 is arranged between the third guide rods 24, and the third guide rod 24 passes through the lifting plate 26, and the third guide rod 24 and the lifting plate 26 are slidably matched.

[0030] The base 1 is placed next to the anesthesia ventilator, and the anesthesia trachea and the oxygen supply tube are connected through the connecting tube 3. The lifting plate 26 and the arc block 27 controlled by the pull plate 29 and the fourth reset spring 25 are used to clamp and fix the pipeline. After the mask air inlet pipe 2 is inserted into the base 1, the first reset spring 8 drives the first pressure block 5 to cooperate with the second pressure block 6, and the limit block 14 is inserted into the limit groove 15 to fix it. When there is a leak, the gas enters the annular cavity 16, lifts the pressure plate 17 and the trigger rod 18, and triggers the pressure sensor 21. The pressure sensor 21 activates the alarm 23 through the controller 22 to ensure stable ventilation and quickly respond to leaks to ensure patient safety.

[0031] See also Figure 5 An annular cavity 16 is provided on the upper side of the interior of the base 1, which can provide a closed space for detecting changes in gas pressure. A trigger cavity 20 is provided on one side of the upper end of the annular cavity 16, which provides a path for the movement of the trigger rod 18. A pressure plate 17 is slidably provided on one side of the upper end of the interior of the annular cavity 16, and a trigger rod 18 is bonded and fixed to the upper end of the pressure plate 17. When the gas pressure inside the annular cavity 16 increases, the pressure plate 17 and the trigger rod 18 can be pushed to move, thereby triggering the alarm mechanism, and one end of the trigger rod 18 passes through and extends into the interior of the trigger cavity 20, and a third reset spring 19 is sleeved on the outside of the trigger rod 18 at one end of the interior of the annular cavity 16, and one end of the third reset spring 19 is connected to the annular cavity 16, and the third reset spring 19 is provided on the outer side of the trigger rod 18. The other end of the positioning spring 19 is connected to the pressure plate 17, which can keep the pressure plate 17 and the trigger rod 18 in the initial position when there is no air pressure, and provide a certain buffering effect. A pressure sensor 21 is installed at the upper end of the trigger chamber 20, and a controller 22 is provided at the upper end of the trigger chamber 20, and the input end of the controller 22 is electrically connected to the output end of the pressure sensor 21, so as to realize signal transmission and processing. The controller 22 determines whether to start the alarm 23 according to the received signal. An alarm 23 is installed on one side of the upper end of the base 1, and the input end of the alarm 23 is electrically connected to the output end of the controller 22, so as to be able to promptly issue an alarm when a gas leak is detected, so as to remind medical staff to take corresponding measures.

[0032] See also Figure 7 The first guide rod 7 is sleeved with a first return spring 8 on the outside, and the second guide rod 9 is sleeved with a second return spring 10 on the outside. The second return spring 10 can provide elastic support for the movement of the first pressure block 5 and the second pressure block 6, so that after the pull plate 29 is released, the first pressure block 5 and the second pressure block 6 can automatically reset. One end of the first return spring 8 and the second return spring 10 are connected to the connecting block 11, and the other ends of the first return spring 8 and the second return spring 10 are connected to the transmission chamber 4 to ensure the fixation and stable operation of the springs.

[0033] See also Figure 1 , Figure 2 , Figure 4and Figure 7 A connecting plate 13 is provided in front of the base 1, and a pull rod 12 is bonded and fixed to the front end of the first pressure block 5. One end of the pull rod 12 passes through and extends to the outside of the transmission chamber 4, and the pull rod 12 and the transmission chamber 4 are slidably matched. The pull rod 12 and the first pressure block 5 are driven to move by pulling the connecting plate 13, thereby releasing the fixation of the mask inlet pipe 2, and the end of the pull rod 12 located outside the transmission chamber 4 is bonded and fixed to the connecting plate 13, thereby ensuring a stable connection between the connecting plate 13 and the pull rod 12.

[0034] See also Figure 4 and Figure 7 , the mask air inlet pipe 2 is provided with limiting grooves 15 on both sides of one end of the inner part of the base 1, and the inner side of the second pressing block 6 is adhered and fixed with the limiting block 14, and the mask air inlet pipe 2 is fixed by the cooperation of the limiting block 14 and the limiting groove 15, one end of the limiting block 14 passes through and extends to the outside of the transmission cavity 4, and the limiting block 14 is adapted to the limiting groove 15 to ensure that the limiting block 14 can be smoothly inserted into the limiting groove 15 to achieve stable fixation, and the lower side of the outer side of the third guide rod 24 is sleeved with a fourth return spring 25, one end of the fourth return spring 25 is connected to the lifting plate 26, and the other end of the fourth return spring 25 is connected to the base 1, after the pull plate 29 is released, the lifting plate 26 and the arc block 27 are automatically reset by the elastic force of the fourth return spring 25, and the anesthesia trachea and the oxygen supply tube are clamped and fixed.

[0035] See also Figure 1 , Figure 3 , Figure 5 and Figure 6 A slide bar 28 is bonded and fixed inside the lifting plate 26, and both ends of the slide bar 28 extend to the outside of the lifting plate 26, which can ensure that the lifting plate 26 remains stable during movement and is not prone to displacement. A pull plate 29 is bonded and fixed to the upper end of the slide bar 28, and an arc block 27 is bonded and fixed to the lower end of the slide bar 28. A clamping groove 30 is provided directly below the arc block 27. The arc block 27 and the clamping groove 30 cooperate to firmly clamp the anesthesia trachea and the oxygen supply tube.

[0036] See also Figure 2 A heating block 31 is provided at the lower end of the base 1. The heating block 31 can heat the gas entering the base 1 to prevent discomfort to the patient due to the low gas temperature. It also helps to keep the gas dry and reduce the generation of condensed water.

[0037] Working principle: When in use, place the base 1 on one side of the anesthesia ventilator, insert the anesthesia trachea and the oxygen supply tube from both sides of the base 1 respectively, and connect them to the connecting tube 3. Before connecting, grab the pull plate 29 and pull it. The pull plate 29 will drive the lifting plate 26 to move up, so that the fourth reset spring 25 is stretched. After the anesthesia trachea and the oxygen supply tube are connected to the connecting tube 3, the pull plate 29 can be released. Under the elastic recovery action of the fourth reset spring 25, the lifting plate 26 will drive the arc block 27 to squeeze the anesthesia trachea and the oxygen supply tube, and clamp them. The groove 30 can be used to clamp and fix the anesthesia trachea and the oxygen supply tube, ensuring the continuity and stability of the ventilation process and reducing the risk of treatment interruption caused by loose pipes. The upper end of the mask air inlet pipe 2 base 1 is inserted, and the first pressure block 5 can be squeezed against the second pressure block 6 through the elastic action of the first return spring 8, so that the limit block 14 can be driven to snap into the inside of the limit groove 15 to complete the rapid installation of the mask air inlet pipe 2. At the same time, just pull the connecting plate 13, and the connecting plate 13 will drive the two pull rods 12 to make the first The pressing block 5 moves, so that the first pressing block 5 releases the squeezing of the second pressing block 6. Under the pulling of the second return spring 10, the second pressing block 6 drives the limiting block 14 to move out of the limiting groove 15, so that the mask air inlet pipe 2 can be quickly fixed, and the mask air inlet pipe 2 can be quickly disassembled and assembled, which greatly shortens the operation time and can gain precious treatment time for the patient. The rubber soft segment adhered and fixed to the inner wall of the upper end of the base 1 can ensure the air tightness after the connection. If a gas leak occurs, the gas will first enter the inside of the annular cavity 16, so that the air pressure inside the annular cavity 16 increases, so that the pressing plate 17 can be moved upward. The movement of the pressing plate 17 will cause the trigger rod 18 to move synchronously. As the airflow increases, the trigger rod 18 will squeeze the pressure sensor 21, and the pressure sensor 21 will send an electrical signal to the controller 22. After processing, the controller 22 will start the alarm 23 and send an alarm sound to remind nearby medical staff. Through its highly recognizable sound characteristics, it effectively avoids the risk of being ignored in a complex medical environment and maximizes the safety and treatment effect of the patient.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A ventilation device for an anesthesia breathing machine, comprising a base (1), characterized in that: Connecting pipes (3) are arranged on both sides of the base (1), and the connecting pipes (3) are used to connect the anesthesia airway and the oxygen supply pipe. A mask air inlet pipe (2) is arranged on the upper end of the base (1), and one end of the mask air inlet pipe (2) extends to the inside of the base (1). Transmission chambers (4) are opened on both sides of the middle position inside the base (1). A first pressing block (5) is arranged inside the transmission chamber (4), and a second pressing block (6) is arranged on one side of the first pressing block (5). A first guide rod (7) is bonded and fixed to one side of the transmission chamber (4). The upper portion of the transmission chamber (4) is provided with a first pressing block (5). A second guide rod (9) is adhesively fixed to the end, the first guide rod (7) and the first pressure block (5) and the second guide rod (9) and the second pressure block (6) are connected through a connecting block (11), and the connecting block (11) and the first guide rod (7) and the second guide rod (9) are slidably matched, and third guide rods (24) are adhesively fixed to the front sides of both sides of the base (1), and a lifting plate (26) is arranged between the third guide rods (24), the third guide rods (24) penetrate the lifting plate (26), and the third guide rods (24) and the lifting plate (26) are slidably matched.

2. A ventilation device for an anesthesia breathing machine according to claim 1, characterized in that: An annular cavity (16) is provided on the upper side of the interior of the base (1), a trigger cavity (20) is provided on one side of the upper end of the annular cavity (16), a pressure plate (17) is slidably provided on one side of the upper end of the interior of the annular cavity (16), a trigger rod (18) is adhesively fixed to the upper end of the pressure plate (17), and one end of the trigger rod (18) passes through and extends into the interior of the trigger cavity (20), a third return spring (19) is sleeved on the outside of one end of the trigger rod (18) located inside the annular cavity (16), one end of the third return spring (19) is connected to the annular cavity (16), and the other end of the third return spring (19) is connected to the pressure plate (17).

3. A ventilation device for an anesthesia breathing machine according to claim 2, characterized in that: A pressure sensor (21) is installed at the upper end of the trigger chamber (20), a controller (22) is provided at the upper end of the trigger chamber (20), and an input end of the controller (22) is electrically connected to an output end of the pressure sensor (21), and an alarm (23) is installed on one side of the upper end of the base (1), and an input end of the alarm (23) is electrically connected to an output end of the controller (22).

4. The ventilation device of an anesthesia breathing machine according to claim 1, characterized in that: A first return spring (8) is sleeved on the outside of the first guide rod (7), one end of the first return spring (8) is connected to the connecting block (11), and the other end of the first return spring (8) is connected to the transmission chamber (4).

5. The ventilation device of an anesthesia breathing machine according to claim 1, characterized in that: A second return spring (10) is sleeved on the outside of the second guide rod (9), one end of the second return spring (10) is connected to the connecting block (11), and the other end of the second return spring (10) is connected to the transmission chamber (4).

6. A ventilation device for an anesthesia breathing machine according to claim 1, characterized in that: A connecting plate (13) is provided in front of the base (1), and a pull rod (12) is bonded and fixed to the front end of the first pressure block (5), one end of the pull rod (12) passes through and extends to the outside of the transmission cavity (4), and the pull rod (12) and the transmission cavity (4) are slidably matched, and the end of the pull rod (12) located outside the transmission cavity (4) is bonded and fixed to the connecting plate (13).

7. A ventilation device for an anesthesia breathing machine according to claim 1, characterized in that: The mask air inlet pipe (2) is provided with limiting grooves (15) on both sides of one end inside the base (1), and the inner side of the second pressing block (6) is adhered and fixed with a limiting block (14), one end of the limiting block (14) passes through and extends to the outside of the transmission cavity (4), and the limiting block (14) is adapted to the limiting groove (15).

8. The ventilation device of an anesthesia breathing machine according to claim 1, characterized in that: A fourth return spring (25) is sleeved on the lower side of the outside of the third guide rod (24), one end of the fourth return spring (25) is connected to the lifting plate (26), and the other end of the fourth return spring (25) is connected to the base (1).

9. A ventilation device for an anesthesia breathing machine according to claim 1, characterized in that: A sliding rod (28) is adhesively fixed inside the lifting plate (26), and both ends of the sliding rod (28) extend to the outside of the lifting plate (26). A pulling plate (29) is adhesively fixed to the upper end of the sliding rod (28), and an arc block (27) is adhesively fixed to the lower end of the sliding rod (28). A clamping groove (30) is provided directly below the arc block (27).

10. The ventilation device of an anesthesia breathing machine according to claim 1, characterized in that: A heating block (31) is provided at the lower end inside the base (1).

Images