Closed automatic sputum suction system for intensive care unit (ICU) for severe heart

Abstract

The invention discloses an intensive care unit (ICU) closed automatic sputum suction system for severe heart, and relates to the technical field of medical equipment. The device comprises a sputum collection chamber, a rotary cut-in pipe nozzle, a separated gas exhaust pipe, an exhaust throwing pipe and other key components. According to the system, sputum and gas are efficiently separated through high-speed rotation and centrifugal force, and the exhausted gas is sterilized through multi-stage disinfection. The balance weight adjusting device can automatically balance the system after the sputum suction amount is increased, and continuous work of the device at the critical moment is guaranteed through double-motor configuration. The design is suitable for medical scenes with extremely high requirements on sensing control and efficiency, such as ICU (intensive care unit) with severe heart, and a brand new solution is provided for clinical safety and patient nursing.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a closed automatic sputum suction system for cardiac intensive care unit (ICU). Background Art

[0002] In the traditional sputum suction operation in cardiac intensive care unit (ICU), most use open or semi-closed sputum suction devices. Medical staff often need to first insert the sputum suction tube into the patient's trachea or respiratory tract, and then rely on negative pressure suction to collect sputum into a simple container. Although this method has a relatively simple structure, it is easy to cause the spread of germs in the air. In addition, traditional solutions usually lack effective liquid-gas separation and pipeline rotating liquid flinging functions, resulting in easy blockage due to sputum residue, greatly reducing the sputum suction efficiency, and even overflowing during operation, increasing the risk of contamination for medical staff. In order to disinfect the discharged gas, some existing technologies only install a simple filter membrane at the outlet of the negative pressure pump, which is difficult to completely remove viruses or germs carried in the air; if the disinfection device or pipeline cleaning is not properly handled, it is easy to cause secondary pollution and cannot meet the high-standard infection control requirements. Summary of the Invention

[0003] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: A closed automatic sputum suction system for cardiac intensive care unit (ICU), including an execution housing, in which a first annular bracket and a second annular bracket are fixedly installed in parallel and coaxially inside the execution housing; a discharge and suction support pipe is rotatably installed at the center of the first annular bracket, and a rotating magnetic suction cup is embedded and rotatably installed at the center of the second annular bracket, and an inhalation elbow that can rotate in cooperation with itself can be inserted into the rotating magnetic suction cup; an exhaust and liquid flinging pipe is fixedly communicated in the radial direction of the discharge and suction support pipe, and a Japanese character frame is fixed at the connection between the exhaust and liquid flinging pipe and the discharge and suction support pipe, and the Japanese character frame can rotate synchronously with the discharge and suction support pipe; a tray is elastically installed on the Japanese character frame, a sputum collection chamber is lapped on the tray, a separated gas discharge pipe is arranged at the center inside the sputum collection chamber, a cone is provided at one end of the inner wall of the separated gas discharge pipe, the end of the separated gas discharge pipe far from the cone extends to the outside of the sputum collection chamber, and a communication is provided between the separated gas discharge pipe and the exhaust and liquid flinging pipe.

[0004] Preferably, a rotating connection nozzle is fixedly installed on the second annular bracket or the execution housing in a detachable manner, the rotating connection nozzle is rotatably and hermetically communicated with the inhalation elbow, and a sputum suction hose is also rotatably and hermetically communicated with the rotating connection nozzle; a magnetic attraction block is fixed on the outer surface of the inhalation elbow, and the magnetic attraction block is magnetically attracted and matched with the rotating magnetic suction cup.

[0005] Preferably, the separated gas discharge pipe is fixedly matched with the sputum collection chamber, a plurality of ventilation holes are provided at one end of the separated gas discharge pipe located at the cone, and the separated gas discharge pipe and the exhaust and liquid flinging pipe are connected by a threaded fastening fit.

[0006] Preferably, a rotating cutting nozzle is fixedly connected to the tangent direction of the outer surface of the sputum collecting chamber, and the rotating cutting nozzle is fixedly connected to the suction elbow.

[0007] Preferably, three pallet support slide bars parallel to the axis of the sputum collection chamber are fixedly installed on the tray, and the three pallet support slide bars are all slidably set on the Japanese-shaped frame, and a drag plate extrusion spring is arranged around each pallet support slide bar, and both ends of the drag plate extrusion spring are fixedly matched with the tray and the Japanese-shaped frame; a threaded tube is threadedly installed at a position coaxial with the sputum collection chamber on the Japanese-shaped frame, and a limiting ring disk is fixed to the bottom end of the threaded tube, and the limiting ring disk is in contact with all the pallet support slide bars.

[0008] Preferably, a counterweight adjustment chamber and a counterweight release chamber are fixedly installed on the end of the Japanese-shaped frame away from the tray, the counterweight adjustment chamber and the counterweight release chamber are connected by a counterweight adjustment pipe, and a counterweight adjustment electric-controlled valve is installed in series in the counterweight adjustment pipe, wherein liquid for counterweight is provided in the counterweight adjustment chamber and the counterweight release chamber.

[0009] Preferably, an induction asynchronous motor and a permanent magnet synchronous motor are fixedly installed at the bottom of the execution shell, one end of the exhaust and intake support pipe extends to the outside of the execution shell, and the exhaust and intake support pipe is located at the position outside the execution shell and is fixedly sleeved with a passive pulley, and the passive pulley is connected to the output shafts of the induction asynchronous motor and the permanent magnet synchronous motor through the first transmission belt and the second transmission belt respectively.

[0010] Preferably, the execution shell is fixedly mounted on the base, a disinfection pool is also fixedly mounted on the base, a heat insulation cover is fixedly arranged between the disinfection pool and the execution shell, an air pump is fixedly mounted on the heat insulation cover, the air inlet of the air pump is rotated and sealed with the exhaust suction bracket pipe, and the exhaust port of the air pump is fixedly connected with a spiral steel pipe.

[0011] Preferably, the spiral steel pipe is fixed on a spiral steel pipe bracket, the spiral steel pipe bracket is fixed on the heat insulation cover and the execution shell, the end of the spiral steel pipe away from the air pump is fixedly connected to a submerged air pipe, one end of which extends to the disinfectant arranged inside the disinfection tank; two exhaust pipes are also fixedly connected on the disinfection tank, wherein the spiral steel pipe surrounds the outside of the two exhaust pipes, and one end of the exhaust pipe away from the disinfection tank extends to the outside of a protective shell, which is fixed on the base, and the protective shell is used to cover the spiral steel pipe.

[0012] Preferably, a window is provided on the execution shell, and a sliding door and window is slidably provided at the window, and the sliding door and window is used to block the window.

[0013] The present invention has the following beneficial effects compared with the prior art: (1) The present invention adopts a closed automatic sputum suction design. By combining high-speed rotation and centrifugal force inside the sputum collection chamber, it can efficiently separate sputum from gas. Compared with traditional open operations, this system can effectively reduce the risk of cross-infection between medical staff and patients. At the same time, components such as the rotating cutting nozzle and the inhalation elbow can be disassembled and replaced, which helps to standardize the medical process and improve safety; (2) A conical structure is provided at the bottom of the sputum collection chamber of the present invention, and in cooperation with the high-speed rotation of the exhaust swing pipe, sputum and excess liquid can be thrown towards the bottom of the sputum chamber, avoiding adhesion to the pipe wall or the surface of components, reducing the probability of pipeline blockage. This design not only ensures the continuity of sputum suction, but also effectively improves the operating efficiency of the device, extends the service life of key components, and reduces the daily maintenance cost; (3) The cooperation of the "day" character frame and the counterweight adjustment chamber of the present invention can achieve the balance of the sputum collection chamber during rotation. By finely adjusting the liquid inside the counterweight release chamber through the counterweight adjustment electric control valve, the overall stability of the device can still be ensured under the condition of increasing sputum suction volume; (4) The multiple disinfection functions of the high-temperature spiral steel pipe and the exhaust pipe of the present invention inactivate the virus-containing gas entering the air pump at high temperature first, and then perform secondary sterilization with disinfectant. Finally, the exhaust pipe conducts the third heating and disinfection. Multi-stage disinfection can not only significantly reduce the risk of pathogen leakage, but also provide safety guarantee for occasions such as intensive care units, effectively improving the infection control level; (5) The integrated permanent magnet synchronous motor and induction asynchronous motor of the present invention achieve dual-motor backup. Once the permanent magnet synchronous motor fails, it can be quickly switched to the induction asynchronous motor to drive the rotation of the exhaust and suction support pipe and its related components, maintaining the normal operation of the centrifugal separation function. This dual safety redundancy design reduces the medical risk caused by accidental shutdown and improves the reliability and continuous working ability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the sliding door and window of the present invention.

[0015] Figure 2 It is a schematic structural diagram of the whole of the present invention.

[0016] Figure 3 It is a schematic structural diagram of the disinfection pool of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the execution shell of the present invention.

[0018] Figure 5 It is a schematic structural diagram of the annular bracket of the present invention.

[0019] Figure 6 For the present invention Figure 5 Schematic structural diagram of the structure at position A.

[0020] Figure 7This is a schematic diagram of the Chinese character "Ri" frame structure of the present invention.

[0021] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at position B.

[0022] Figure 9 This is a schematic diagram of the structure at the separated gas discharge pipe of the present invention.

[0023] In the figure: 101 - base; 102 - disinfection tank; 103 - protective shell; 104 - heat insulation cover; 105 - exhaust pipe; 106 - spiral steel pipe support; 107 - spiral steel pipe; 108 - air pump; 109 - execution housing; 110 - sunken air pipe; 111 - sliding door and window; 112 - window; 113 - sputum suction hose; 114 - induction asynchronous motor; 115 - first drive belt; 116 - permanent magnet synchronous motor; 117 - second drive belt; 118 - driven pulley; 119 - exhaust and suction support pipe; 120 - first annular support; 121 - second annular support; 122 - Chinese character "Ri" frame; 123 - rotary connection nozzle; 124 - rotary magnetic suction cup; 125 - magnetic suction block; 126 - counterweight adjustment cavity; 127 - counterweight release cavity; 128 - counterweight adjustment pipe; 129 - counterweight adjustment electric control valve; 130 - exhaust swing pipe; 131 - sputum collection chamber; 132 - suction elbow; 133 - rotary cutting nozzle; 134 - separated gas discharge pipe; 135 - ventilation hole; 136 - cone; 137 - tray; 138 - tray support slide bar; 139 - tray compression spring; 140 - threaded pipe; 141 - limiting ring plate. Detailed implementation manners

[0024] Next, in combination with the attached Figures 1-9 , and further illustrate the technical solution of the present invention through specific implementation manners.

[0025] The present invention provides a closed automatic sputum suction system for cardiac intensive care unit (ICU), which includes an execution housing 109. Inside the execution housing 109, a first annular bracket 120 and a second annular bracket 121 are fixedly installed in parallel and coaxially. At the axis center of the first annular bracket 120, a discharge and suction support pipe 119 is rotatably installed. At the axis center of the second annular bracket 121, a rotary magnetic suction cup 124 is embedded and rotatably installed. An inhalation elbow 132 that rotates in cooperation with itself can be inserted into the rotary magnetic suction cup 124. A discharge and exhaust pipe 130 is fixedly communicated in the radial direction of the discharge and suction support pipe 119. A day-shaped frame 122 is fixed at the connection between the discharge and exhaust pipe 130 and the discharge and suction support pipe 119, and the day-shaped frame 122 can rotate synchronously with the discharge and suction support pipe 119. A tray 137 is elastically installed on the day-shaped frame 122, and a sputum collection chamber 131 is lapped on the tray 137. At the axis center inside the sputum collection chamber 131, a separated gas discharge pipe 134 is provided. At one end of the inner wall of the separated gas discharge pipe 134, a cone 136 is provided. The end of the separated gas discharge pipe 134 away from the cone 136 extends to the outside of the sputum collection chamber 131, and the separated gas discharge pipe 134 is communicated with the discharge and exhaust pipe 130. A rotary connection nozzle 123 is fixedly installed on the second annular bracket 121 or the execution housing 109 in a detachable manner. The rotary connection nozzle 123 is rotatably and hermetically communicated with the inhalation elbow 132, and a sputum suction hose 113 is also rotatably and hermetically communicated with the rotary connection nozzle 123. A magnetic attraction block 125 is fixed on the outer surface of the inhalation elbow 132, and the magnetic attraction block 125 is magnetically attracted and matched with the rotary magnetic suction cup 124. The separated gas discharge pipe 134 is fixedly matched with the sputum collection chamber 131. At the end of the separated gas discharge pipe 134 located at the cone 136, a plurality of ventilation holes 135 are provided. The separated gas discharge pipe 134 and the discharge and exhaust pipe 130 are connected by a threaded fastening fit. A rotary cutting nozzle 133 is fixedly communicated on the tangent direction of the outer surface of the sputum collection chamber 131, and the rotary cutting nozzle 133 is fixedly communicated with the inhalation elbow 132. Three tray support sliding rods 138 parallel to the axis of the sputum collection chamber 131 are fixedly installed on the tray 137. The three tray support sliding rods 138 are all slidably arranged on the day-shaped frame 122, and a tray extrusion spring 139 is arranged around each tray support sliding rod 138. The two ends of the tray extrusion spring 139 are fixedly matched with the tray 137 and the day-shaped frame 122. A threaded pipe 140 is installed in a threaded fit at the position of the day-shaped frame 122 coaxial with the sputum collection chamber 131. A limiting ring plate 141 is fixed at the bottom end of the threaded pipe 140, and the limiting ring plate 141 is in contact with all the tray support sliding rods 138.A counterweight adjustment chamber 126 and a counterweight release chamber 127 are fixedly installed on one end of the Japanese-shaped frame 122 away from the tray 137. The counterweight adjustment chamber 126 and the counterweight release chamber 127 are connected by a counterweight adjustment pipe 128, and a counterweight adjustment electric control valve 129 is installed in series in the counterweight adjustment pipe 128, wherein the counterweight adjustment chamber 126 and the counterweight release chamber 127 are provided with liquid for counterweight. An induction asynchronous motor 114 and a permanent magnet synchronous motor 116 are fixedly installed at the bottom of the execution housing 109, one end of the exhaust air suction support pipe 119 extends to the outside of the execution housing 109, and a passive pulley 118 is fixedly sleeved at the position of the exhaust air suction support pipe 119 located outside the execution housing 109, and the passive pulley 118 is connected to the output shafts of the induction asynchronous motor 114 and the permanent magnet synchronous motor 116 through a first transmission belt 115 and a second transmission belt 117, respectively.

[0026] The execution shell 109 is fixedly installed on the base 101, and the disinfection pool 102 is also fixedly installed on the base 101. A heat insulation cover 104 is fixedly installed between the disinfection pool 102 and the execution shell 109. An air pump 108 is fixedly installed on the heat insulation cover 104. The air inlet of the air pump 108 is rotatably sealed with the exhaust suction bracket pipe 119, and the exhaust port of the air pump 108 is fixedly connected with a spiral steel pipe 107. The spiral steel pipe 107 is fixed on the spiral steel pipe bracket 106, and the spiral steel pipe bracket 106 is fixed on the heat insulation cover 104 and the execution shell 109. The end of the spiral steel pipe 107 away from the air pump 108 is fixedly connected with a sunken air pipe 110, one end of which extends to the disinfectant set in the disinfection tank 102; the disinfection tank 102 is also fixedly connected with two exhaust pipes 105, wherein the spiral steel pipe 107 surrounds the outside of the two exhaust pipes 105, and the end of the exhaust pipe 105 away from the disinfection tank 102 extends to the outside of the protective shell 103, and the protective shell 103 is fixed on the base 101, and the protective shell 103 is used to cover the spiral steel pipe 107. The execution shell 109 is provided with a window 112, and a sliding door and window 111 is slidably provided at the window 112, and the sliding door and window 111 is used to block the window 112.

[0027] The working principle of a closed automatic sputum suction system for cardiac intensive care unit (ICU) disclosed by the present invention is as follows: The sputum collection chamber 131, the rotary cutting nozzle 133, the separated gas discharge pipe 134, the suction elbow 132, the rotary connecting nozzle 123, and the sputum suction hose 113 are disposable products and need to be replaced. Before use, first slide the sliding door and window 111 to open the window 112. At this time, place the sputum collection chamber 131 inside the execution housing 109. Specifically, place the sputum collection chamber 131 on the tray 137. At this time, it is necessary to press down the tray 137 so that the tray compression spring 139 is compressed. Then, thread-fix the separated gas discharge pipe 134 on the sputum collection chamber 131 to the exhaust swing pipe 130. Subsequently, also place the suction elbow 132 inside the execution housing 109, and fix and connect the suction elbow 132 and the rotary cutting nozzle 133. At the same time, insert the end of the suction elbow 132 away from the rotary cutting nozzle 133 into the inside of the rotary magnetic suction cup 124 and extend it outside the execution housing 109, and connect it to the sputum suction hose 113 through the rotary connecting nozzle 123. During this process, the magnetic attraction block 125 fixed on the suction elbow 132 will be magnetically attracted to the rotary magnetic suction cup 124. Finally, rotate the threaded pipe 140 so that the threaded pipe 140 axially displaces along the "day" - shaped frame 122, and make the limiting ring plate 141 contact the support slide rod 138 of the tray, so that the support slide rod 138 of the tray cannot slide on the "day" - shaped frame 122, for fixing the sputum collection chamber 131 and preventing the sputum collection chamber 131 from shaking on the "day" - shaped frame 122.

[0028] During use, medical staff insert the sputum suction hose 113 into the part of the patient where sputum suction is required, and then start the air pump 108 and the spiral steel pipe 107. The spiral steel pipe 107 is started first. After the air pump 108 is started, it will suck the air inside the collection sputum chamber 131 through the exhaust suction support pipe 119, reducing the air pressure inside the collection sputum chamber 131. At the same time, the pressure inside the rotary cutting nozzle 133, the suction elbow 132, and the sputum suction hose 113 will also decrease. Under the push of the external pressure, the sputum will be sucked into the sputum suction hose 113, then enter the rotary cutting nozzle 133 through the suction elbow 132, and enter the inside of the collection sputum chamber 131 along the tangent of the inner wall of the collection sputum chamber 131 through the rotary cutting nozzle 133. At this time, the sputum will rotate inside the collection sputum chamber 131 and rotate along the inner wall of the collection sputum chamber 131 under the action of centrifugal force, while the air and a small amount of liquid (such as saliva) will enter the separation gas discharge pipe 134 through the ventilation holes 135, and then enter the air pump 108 through the exhaust swing pipe 130 and the exhaust suction support pipe 119. To prevent excess liquid from entering the air pump 108, it is necessary to start the permanent magnet synchronous motor 116 in advance. The output shaft of the permanent magnet synchronous motor 116 drives the driven pulley 118 to rotate through the second transmission belt 117 (if the permanent magnet synchronous motor 116 is damaged, the induction asynchronous motor 114 can be started, and the induction asynchronous motor 114 drives the driven pulley 118 to rotate through the first transmission belt 115). The rotation of the driven pulley 118 drives the exhaust suction support pipe 119 to rotate, and the rotation of the exhaust suction support pipe 119 drives all the components fixed to the exhaust suction support pipe 119 to rotate, including the components installed on the "day" - shaped frame 122. During this process, the collection sputum chamber 131 and the exhaust swing pipe 130 will rotate. Therefore, the liquid inside the collection sputum chamber 131 and the exhaust swing pipe 130 will be affected by centrifugal force and move towards the bottom inside the collection sputum chamber 131 (overcoming air resistance). The provided cone 136 can make the liquid falling on the cone 136 slide back into the collection sputum chamber 131. As the sputum sucked inside the collection sputum chamber 131 continuously increases, the weight of the collection sputum chamber 131 will increase. To ensure the balance of the rotation of the "day" - shaped frame 122, the counterweight adjustment electric control valve 129 is controlled. After the counterweight adjustment electric control valve 129 is opened, a small amount of the liquid inside the counterweight release cavity 127 will be discharged into the counterweight adjustment cavity 126, and then the weights inside the counterweight adjustment cavity 126 and the collection sputum chamber 131 will be balanced, preventing the collection sputum chamber 131 from shaking during rotation.

[0029] The gas entering the air pump 108 will be discharged into the spiral steel pipe 107 through the air pump 108. High-frequency alternating current is applied to both ends of the spiral steel pipe 107 to generate high temperature by itself. Then the gas entering the interior of the spiral steel pipe 107 will be heated by the high temperature, so that the virus carried in the gas is eliminated. Then it is guided to the disinfectant solution inside the disinfection tank 102 through the sunken trachea 110 for secondary disinfection. Finally, the gas is discharged through the exhaust pipe 105. During this process, the exhaust pipe 105 will also be heated by the spiral steel pipe 107, and then the discharged gas is disinfected and sterilized for the third time.

Claims

1. A closed automatic sputum suction system for cardiac intensive care unit, characterized by: The actuator comprises an execution housing (109), wherein a first annular support (120) and a second annular support (121) are fixedly mounted in parallel and coaxially arranged inside the execution housing (109); wherein a discharge air intake support pipe (119) is rotatably mounted at the axis of the first annular support (120), and a rotating magnetic chuck (124) is embedded and rotatably mounted at the axis of the second annular support (121), and a suction elbow (132) that rotates in coordination with the rotating magnetic chuck (124) can be inserted into the rotating magnetic chuck (124); An exhaust pipe (130) is fixedly connected to the exhaust air support pipe (119) in a radial direction, and a Japanese-shaped frame (122) is fixed at the connection between the exhaust pipe (130) and the exhaust air support pipe (119). The Japanese-shaped frame (122) can rotate synchronously with the exhaust air support pipe (119); A tray (137) is elastically mounted on the Japanese-shaped frame (122), a sputum collecting chamber (131) is overlapped on the tray (137), a separation gas discharge pipe (134) is arranged at the axis center inside the sputum collecting chamber (131), a cone (136) is arranged at one end of the inner wall of the separation gas discharge pipe (134), an end of the separation gas discharge pipe (134) away from the cone (136) extends to the outside of the sputum collecting chamber (131), and the separation gas discharge pipe (134) is connected to the exhaust pipe (130).

2. A closed automatic sputum suction system for cardiac intensive care unit according to claim 1, characterized in that: A rotating connection nozzle (123) is fixedly mounted on the second annular bracket (121) or the execution shell (109) in a manner that is easy to disassemble. The rotating connection nozzle (123) is connected to the suction elbow (132) in a rotating sealed manner. The rotating connection nozzle (123) is also connected to a sputum suction hose (113) in a rotating sealed manner. A magnetic suction block (125) is fixed on the outer surface of the suction elbow (132), and the magnetic suction block (125) is magnetically matched with the rotating magnetic suction cup (124).

3. A closed automatic sputum suction system for cardiac intensive care unit according to claim 2, characterized in that: The separation gas discharge pipe (134) is fixedly matched with the sputum collection chamber (131); a plurality of vent holes (135) are provided at one end of the separation gas discharge pipe (134) located at the cone (136); and the separation gas discharge pipe (134) is connected to the exhaust pipe (130) by means of a threaded fastening fit.

4. A closed automatic sputum suction system for cardiac intensive care unit according to claim 3, characterized in that: A rotating cutting nozzle (133) is fixedly connected to the tangent direction of the outer surface of the sputum collection chamber (131), and the rotating cutting nozzle (133) is fixedly connected to the suction elbow (132).

5. A closed automatic sputum suction system for cardiac intensive care unit according to claim 4, characterized in that: Three tray support slide bars (138) arranged parallel to the axis of the sputum collecting chamber (131) are fixedly mounted on the tray (137). The three tray support slide bars (138) are all slidably mounted on the Japanese-shaped frame (122), and a tray extrusion spring (139) is arranged around each tray support slide bar (138). Both ends of the tray extrusion spring (139) are fixedly matched with the tray (137) and the Japanese-shaped frame (122). A threaded tube (140) is threadedly mounted at a position coaxial with the sputum collecting chamber (131) on the Japanese-shaped frame (122). A limiting ring disk (141) is fixed to the bottom end of the threaded tube (140). The limiting ring disk (141) is in contact with all the tray support slide bars (138).

6. A closed automatic sputum suction system for cardiac intensive care unit according to claim 5, characterized in that: A counterweight adjustment chamber (126) and a counterweight release chamber (127) are fixedly mounted on one end of the Japanese-shaped frame (122) away from the tray (137); the counterweight adjustment chamber (126) and the counterweight release chamber (127) are connected via a counterweight adjustment pipe (128); a counterweight adjustment electric control valve (129) is installed in series in the counterweight adjustment pipe (128); and liquid for counterweight is provided in the counterweight adjustment chamber (126) and the counterweight release chamber (127).

7. A closed automatic sputum suction system for cardiac intensive care unit according to claim 6, characterized in that: An induction asynchronous motor (114) and a permanent magnet synchronous motor (116) are fixedly mounted on the bottom of the execution housing (109); one end of an exhaust air intake support pipe (119) extends to the outside of the execution housing (109); and a passive pulley (118) is fixedly sleeved on the exhaust air intake support pipe (119) located outside the execution housing (109); the passive pulley (118) is transmission-connected to the output shafts of the induction asynchronous motor (114) and the permanent magnet synchronous motor (116) respectively via a first transmission belt (115) and a second transmission belt (117).

8. A closed automatic sputum suction system for cardiac intensive care unit according to claim 7, characterized in that: The execution housing (109) is fixedly mounted on the base (101), and a disinfection pool (102) is also fixedly mounted on the base (101). A heat insulation cover (104) is fixedly arranged between the disinfection pool (102) and the execution housing (109), and an air pump (108) is fixedly mounted on the heat insulation cover (104). The air inlet of the air pump (108) is rotatably sealed with a discharge suction support pipe (119), and the exhaust port of the air pump (108) is fixedly connected with a spiral steel pipe (107).

9. A closed automatic sputum suction system for cardiac intensive care unit according to claim 8, characterized in that: The spiral steel pipe (107) is fixed on the spiral steel pipe bracket (106), and the spiral steel pipe bracket (106) is fixed on the heat insulation cover (104) and the execution shell (109). The end of the spiral steel pipe (107) away from the air pump (108) is fixedly connected to a submerged air pipe (110), one end of which extends into the disinfectant provided in the disinfection tank (102); the disinfection tank (102) is also fixedly connected to two exhaust pipes (105), wherein the spiral steel pipe (107) surrounds the outside of the two exhaust pipes (105), and one end of the exhaust pipe (105) away from the disinfection tank (102) extends to the outside of the protective shell (103), and the protective shell (103) is fixed on the base (101). The protective shell (103) is used to cover the spiral steel pipe (107).

10. A closed automatic sputum suction system for cardiac intensive care unit according to claim 9, characterized in that: A window (112) is provided on the execution housing (109), and a sliding door and window (111) is slidably provided at the window (112), and the sliding door and window (111) is used to block the window (112).

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