Portable sputum aspirator

Abstract

The invention relates to the field of medical drainage instruments, in particular to a portable sputum aspirator which comprises a valve cylinder, the valve cylinder is communicated with a liquid storage bottle, a one-way liquid inlet valve is arranged at the communication position, one end of the valve cylinder is communicated with a connector, a one-way air inlet valve is arranged at the communication position, the connector is detachably communicated with a sputum suction pipe, and the other end of the valve cylinder is communicated with a pull rod cylinder. A piston is slidably connected in the pull rod cylinder, a sealing ring is fixed on the periphery of the piston, the piston is connected with a pull rod, a heating sleeve is detachably connected outside the pull rod cylinder, the heating sleeve is filled with a heating material capable of self-heating when encountering air, the valve cylinder is communicated with a hard exhaust pipe, a one-way exhaust valve is arranged on the exhaust pipe, and a vent hole is formed in the heating sleeve. When the heating sleeve is installed on the pull rod cylinder, the exhaust pipe can extrude and break the sealing film, and the diameter of the vent hole is larger than that of the exhaust pipe. The problem that in the prior art, when the sealing ring is used in a field low-temperature environment, the sealing ring is hardened can be solved.

Description

Technical Field

[0001] The invention relates to the field of medical drainage instruments, and in particular to a portable sputum suction device. Background Art

[0002] In the medical field, sputum suction devices are important equipment used to clear patients' respiratory secretions and keep their airways open. They are mainly divided into electric and manual types. With their strong suction power and stable working performance, electric sputum suction devices are widely used in environments with stable power supply such as hospitals. They can efficiently complete sputum suction operations and provide strong support for the treatment of patients.

[0003] However, in scenarios such as field rescue, emergency disaster sites, and remote areas with power shortages, electric suction pumps often cannot be used normally due to their reliance on electricity. At this time, the manual suction pump has played its unique advantages. It does not require an external power supply and can achieve the suction function only by manual operation. It has become a key device for saving patients' lives in these special environments. For example, during outdoor adventures, if someone suddenly has airway obstruction, a manual suction pump can provide first aid at the first time; after natural disasters such as earthquakes and floods, rescue workers can also provide timely airway clearing services for injured patients in temporary medical points.

[0004] The existing manual sputum suction device is usually mainly composed of a piston cylinder, a pull rod, a sputum suction tube, a sputum storage device, and a one-way valve. By manually pulling the pull rod, negative pressure is formed in the piston cylinder, and then the sputum in the patient's respiratory tract is sucked into the sputum storage device through the sputum suction tube, and the one-way valve ensures the one-way flow of gas and sputum to prevent backflow.

[0005] However, when the existing manual sputum suction device is used in a low-temperature environment outdoors, the low temperature will cause the sealing ring in the sputum suction device to harden. The sealing ring plays a key sealing role in the sputum suction device, which can ensure that the piston cylinder forms effective negative pressure and positive pressure during the process of pulling and pushing the pull rod. When the sealing ring hardens, its sealing performance is greatly reduced, and air leakage will occur. This will not only weaken the suction force of the sputum suction device, making it impossible to effectively suck out sputum, seriously affecting the sputum suction effect, but may also cause the entire sputum suction process to be prolonged, increasing the pain and danger of the patient.

[0006] In summary, the existing manual sputum suction device has obvious technical defects in special environments, especially in low-temperature environments outdoors. It is urgent to develop a new type of manual sputum suction device to solve the usage difficulties in low-temperature environments. Summary of the invention

[0007] The present invention is intended to provide a portable sputum suction device to solve the problem in the prior art that the sealing ring hardens and affects the sealing performance of the sputum suction device when used in a low-temperature outdoor environment.

[0008] In order to achieve the above object, the present invention adopts the following technical scheme:

[0009] A portable sputum suction device comprises a valve cylinder, wherein the bottom of the valve cylinder is connected to a liquid storage bottle and a one-way liquid inlet valve for sucking liquid into the liquid storage bottle is arranged at the connection point, one end of the valve cylinder is connected to a joint and a one-way air inlet valve for sucking air into the valve cylinder is arranged at the connection point, the joint is detachably connected to a sputum suction tube, the other end of the valve cylinder is connected to a pull rod cylinder, a piston is slidably connected inside the pull rod cylinder, a sealing ring is fixed on the outer periphery of the piston, the piston is connected to a pull rod, a heating sleeve is detachably connected to the outside of the pull rod cylinder, the heating sleeve is filled with a heating material that self-heats when exposed to air, the valve cylinder is connected to a hard exhaust pipe, the exhaust pipe is provided with a one-way exhaust valve, a vent is opened on the end of the heating sleeve facing the valve cylinder, the vent is sealed with a sealing film, and when the heating sleeve is installed on the pull rod cylinder, the exhaust pipe can squeeze through the sealing film and be inserted into the vent.

[0010] The principles and beneficial effects of this scheme are:

[0011] 1. This solution can be used in ordinary outdoor environments and can also be used in outdoor low-temperature environments. When used in outdoor low-temperature environments, the heating sleeve is installed on the rod barrel. During installation, the exhaust pipe can break the sealing film on the vent and be inserted into the heating sleeve, thereby opening the vent so that the outside air can react with the self-heating heating material in the heating sleeve to generate heat. At the same time, when the rod is pushed in, the gas in the rod barrel is discharged into the heating sleeve through the exhaust pipe, which can promote the contact between the heating material and the air. By setting a heating sleeve filled with self-heating material, in outdoor low-temperature environments, the heat generated by the heating sleeve can effectively increase the temperature of the rod barrel, avoid the hardening of the sealing ring due to low temperature, maintain its good sealing performance, ensure that the piston cylinder can stably form effective negative pressure and positive pressure during the process of pulling and pushing the rod, and ensure that the sputum suction device has sufficient and stable suction, so as to efficiently suck out the sputum in the patient's respiratory tract, greatly improve the suction effect, and reduce the pain and danger of the patient due to unsmooth suction.

[0012] 2. The heating sleeve is detachably connected to the pull rod. When used in ordinary environments, it can be easily removed to reduce the overall weight and volume of the suction device, making it easy to carry and operate. When the heating function is needed in low-temperature environments in the wild, it can be quickly installed and is easy to operate. Even non-professionals can quickly complete the installation operation in an emergency, meeting the use requirements of different scenarios.

[0013] 3. When installing the heating sleeve, the exhaust pipe squeezes the sealing film to realize the automatic opening of the vent hole. After the vent hole is opened, not only can the outside air enter the heating sleeve to react with the heating material, but the gas discharged from the pull rod barrel can also rush into the heating sleeve through the exhaust pipe, further increasing the amount of gas, thereby promoting the reaction of the heating material and improving the heating and heat preservation effect. When the pull rod is pushed in, the gas in the pull rod barrel is discharged into the heating sleeve through the exhaust pipe to promote the contact between the heating material and the air. This design cleverly combines the normal operation of the sputum suction device with the heating process. During the routine operation of suctioning sputum, the user can promote the reaction of the heating material without additional complicated operations, making the heating process more continuous and stable, and at the same time will not interfere with the normal suction process.

[0014] 4. When the heating jacket is not installed, the heating material is isolated from the air and will not heat up in advance, thus avoiding the potential safety hazards caused by premature heating due to misoperation or other factors, such as scalding the user. The vent is sealed with a sealing film, and the exhaust pipe can break the sealing film when the heating jacket is installed. This design not only ensures that when the heating function is not used, the outside air will not enter the heating jacket and react with the heating material at will, but also ensures that the heating process can be started smoothly when heating is required. At the same time, the diameter of the vent is larger than the diameter of the exhaust pipe, which ensures the smoothness of gas discharge and allows the outside air to enter the heating jacket smoothly.

[0015] 5. Due to the extremely low temperature environment, the plastic pull rod tube in the prior art is also easy to harden and become brittle. In the process of holding the pull rod tube and repeatedly pulling the piston, the pull rod tube may be broken and damaged. This solution puts a heating sleeve on the pull rod tube. In addition to heating the piston, it can also heat the pull rod tube. At the same time, holding the heating sleeve instead of directly holding the pull rod tube when pulling the pull rod can effectively prevent the pull rod tube from breaking and being damaged when used in an extremely low temperature environment. In addition, the granular heating material filled in the heating sleeve can be used as a pad to buffer the holding force on the heating sleeve, thereby buffering the holding force transmitted to the pull rod tube, further protecting the pull rod tube.

[0016] 6. In actual use, first put the heating sleeve on the pull rod barrel. At this time, the piston has not been pulled out, and the piston is located in the pull rod barrel, that is, at one end of the pull rod barrel close to the valve barrel. Then connect the suction tube and insert the suction tube into the patient's body. After the heating sleeve is installed on the pull rod barrel, the exhaust pipe has broken through the sealing film and extended into the heating sleeve. The outside air has entered the heating sleeve from the vent. The heating material at the vent has priority to contact with the air to react and generate heat. Therefore, in the process of connecting the suction tube and inserting the suction tube, the heating sleeve has heated the piston, thereby preheating the piston before suction. With the gradual entry of outside air and the repeated pulling and pulling of the piston to discharge the gas, other heating materials in the heating sleeve also gradually react and generate heat.

[0017] Preferably, as an improvement, a dovetail guide groove is opened axially on the outer wall of the pull rod barrel, the end of the guide groove is connected to a dovetail clamping groove opened along the circumference of the pull rod barrel, a slider capable of sliding in the guide groove and the clamping groove is fixed on the inner wall of the heating sleeve, the exhaust pipe is an L-shaped exhaust pipe, the exhaust pipe includes a radial section and an axial section, the radial section is connected to the side wall of the valve barrel, the axial end extends axially to one side of the pull rod barrel, and the vent is an arc hole arranged along the circumference of the heating sleeve.

[0018] Beneficial effects:

[0019] 1. By setting a dovetail guide groove and a clamping groove on the outer wall of the rod barrel, and fixing a matching slider on the inner wall of the heating sleeve, this unique structural design makes the installation of the heating sleeve more stable and reliable. During installation, the rod barrel is first moved axially along the guide groove to the clamping groove, and then rotated to make the slider clamp into the clamping groove to complete the fixing of the heating sleeve. The dovetail structure design can effectively prevent the heating sleeve from loosening or falling off due to external forces such as vibration and collision during use, ensuring that the heating sleeve always maintains a stable position in the working state.

[0020] 2. The vents are designed as arc-shaped holes along the circumference of the heating jacket. This improvement can further increase the area of ​​the vents and significantly increase the amount of outside air entering. Adequate air supply allows the heating material to fully contact the air, accelerates the oxidation reaction, and thus improves the heating efficiency and intensity of the heating jacket.

[0021] 3. With the guide groove and the clamping groove structure, after the exhaust pipe is inserted into the vent hole, it can also rotate along the vent hole. This feature not only ensures that the sealing film of the vent hole can be reliably squeezed and broken, but also makes the operation more flexible and convenient.

[0022] 4. The outside air enters the heating sleeve from the vent hole, so the outer wall of the heating sleeve can be made into a hard shell. On the one hand, it is convenient for storage and transportation, and it will not easily break accidentally and cause the heating material inside to leak; on the other hand, after the hard heating sleeve is put on the pull rod tube, it is convenient for the operator to hold the pull rod tube and push and pull the pull rod stably without affecting the normal operation of the pull rod.

[0023] Preferably, as an improvement, the heating material is a granular heating material, a cavity is isolated in the heating sleeve by an isolation net, the cavity is located at the vent and connected to the vent, and the mesh of the isolation net is smaller than the diameter of the heating material.

[0024] Beneficial effects:

[0025] 1. The cavity is set up through the isolation net to ensure that the exhaust pipe is smoothly inserted into the heating sleeve, and to prevent the heating material from entering the exhaust pipe and causing the exhaust pipe to be blocked during the insertion process. This design ensures that the gas in the pull rod tube can be stably discharged into the heating sleeve through the exhaust pipe, continuously promotes the contact between the heating material and the air, maintains the stable heating state of the heating sleeve, and thus ensures the normal operation of the sputum suction device in a low temperature environment.

[0026] 2. The granular heating material is effectively restricted by the isolation net, which reduces the risk of accidental contact between the heating material and the user or patient, and improves safety during use. At the same time, stable heating and unobstructed exhaust pipes also avoid potential safety hazards caused by poor gas discharge or local overheating, such as burns, equipment damage, etc., providing more reliable safety protection for users and patients.

[0027] Preferably, as an improvement, the cavity is connected to a spiral air passage, and the air passage is arranged along the circumference of the heating sleeve.

[0028] Beneficial effects:

[0029] 1. The outside air and the gas discharged from the exhaust pipe can diffuse from the cavity into the spiral air passage, further increasing the air intake into the heating jacket, providing more sufficient oxygen for the reaction of the heating material, thereby further promoting the heating reaction and enabling the heating jacket to generate heat more quickly and efficiently.

[0030] 2. The spiral air passage allows the gas to be more evenly distributed throughout the heating sleeve, fully and evenly contacting the heating material. This effectively improves the uniformity of the heating sleeve and avoids local overheating or overcooling. By uniformly heating, the rod barrel can be heated in an all-round and balanced manner, and the piston can be stably heated no matter where it is in the rod barrel.

[0031] 3. When the gas discharged from the exhaust pipe flows along the air duct, it can drive the outside air to flow in the air duct, thereby "inhaling" more outside air and making the heating material react more fully.

[0032] Preferably, as an improvement, the exhaust pipe is freely connected to a tapered acceleration air nozzle.

[0033] Beneficial effects:

[0034] 1. By setting the free end of the exhaust pipe as a conical accelerating air nozzle, the diameter of the exhaust pipe can be effectively reduced, thereby accelerating the airflow. The accelerated airflow can flow out more quickly and increase the stroke into the heating sleeve, ensuring that the airflow can smoothly penetrate into the heating sleeve. This not only helps to more fully promote the contact between the heating material and the air, accelerate the heating reaction, and improve the heating efficiency, but also enables the heating sleeve to reach and maintain a suitable heating temperature in a shorter time, providing a strong guarantee for the normal operation of the sputum suction device in a low temperature environment.

[0035] 2. The conical accelerating nozzle has a unique shape. Compared with the ordinary exhaust pipe port, it has a sharper end, which can more easily squeeze the sealing film at the vent hole when installing the heating jacket. This design makes the entire installation process more convenient and reliable, reduces installation failures or inconveniences caused by the difficulty of squeezing the sealing film, and improves the ease of use and stability of the equipment in actual use.

[0036] Preferably, as an improvement, the number of exhaust pipes, guide grooves and clamping grooves are all two and are symmetrically arranged with the pull rod tube as the center, and the number of cavities and vents is also two and matches the two exhaust pipes.

[0037] Beneficial effect: by setting up two groups of exhaust pipes and vents, the outside air and the gas exhausted from the pull rod tube can enter the heating jacket from two positions, further accelerating the heating rate.

[0038] Preferably, as an improvement, the heat-generating material comprises uniformly mixed iron particles, activated carbon particles, zircon particles and sodium chloride particles.

[0039] Beneficial effects: Iron powder reacts with oxygen in the air to generate heat. Activated carbon absorbs moisture in the air to provide the necessary moist environment for the iron particles to react. It also absorbs the gases produced during the reaction, making the heat-generating material more evenly distributed and avoiding uneven distribution due to gas accumulation. Zircon absorbs and stores heat when generating heat, and then releases it slowly, making the heating jacket generate heat more persistently and steadily. Sodium chloride particles are used to catalyze the reaction of iron particles to make the heat proceed quickly.

[0040] Preferably, as an improvement, the thickness of the inner wall of the heating jacket is smaller than the thickness of the outer wall.

[0041] Beneficial effect: In this way, the heat generated by the heating material can be better transferred to the pull rod tube, and sufficient structural strength is also provided to the outer wall of the heating sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention without installing a heating jacket.

[0043] Figure 2This is a schematic diagram of the structure of a heating jacket installed in Example 1 of the present invention.

[0044] Figure 3 This is a cross-sectional view of the heating jacket in Example 1 of the present invention.

[0045] Figure 4 It is a partial left view of embodiment 1 of the present invention.

[0046] Figure 5 This is a schematic diagram of the partial structure of the heating sleeve in Example 1 of the present invention after the outer shell is removed.

[0047] Figure 6 This is a schematic diagram of the partial structure of the heating sleeve in Example 2 of the present invention after the outer shell is removed.

[0048] Figure 7 Schematic diagram of the structure of the exhaust pipe in Example 3 of the present invention. DETAILED DESCRIPTION

[0049] The following is further described in detail through specific implementation methods:

[0050] The figure marks in the drawings of the specification include: suction tube 1, pipe joint 2, joint 3, valve cylinder 4, exhaust pipe 5, pull rod cylinder 6, guide groove 7, slot 71, pull rod 8, liquid storage bottle 9, heating sleeve 10, isolation net 11, heating material 12, piston 13, sealing ring 131, vent 14, sealing film 141, cavity 15, air duct 16, and accelerator nozzle 17.

[0051] Embodiment 1:

[0052] like Figure 1 As shown, a portable sputum suction device includes a transversely arranged valve cylinder 4, the bottom of the valve cylinder 4 is connected to a liquid storage bottle 9 and a one-way liquid inlet valve (not shown in the figure) is installed at the connection point for liquid to enter the liquid storage bottle 9. The left end of the valve cylinder 4 is connected to a joint 3 and a one-way air inlet valve (not shown in the figure) is installed at the connection point for air to enter the valve cylinder 4. The joint 3 is integrally formed with the valve cylinder 4, and the joint 3 is detachably connected to the sputum suction tube 1. The right end of the valve cylinder 4 is connected to a pull rod cylinder 6, which is combined with the pull rod cylinder 6. Figure 3 As shown, a piston 13 is slidably connected inside the pull rod cylinder 6, a sealing ring 131 is glued and fixed to the outer periphery of the piston 13, and the pull rod 8 is glued and fixed to the piston 13.

[0053] Combination Figure 2As shown, a heating sleeve 10 is detachably connected to the outside of the rod barrel 6, and the heating sleeve 10 is filled with a granular heating material 12 that self-heats when exposed to air, and the heating material 12 includes uniformly mixed iron particles, activated carbon particles, zircon particles and sodium chloride particles. The specific installation method of the heating sleeve 10 is that two dovetail-shaped guide grooves 7 along the axial direction are symmetrically opened on the outer wall of the rod barrel 6, and the left ends of the two guide grooves 7 are connected to a dovetail-shaped clamping groove 71 opened along the circumference of the rod barrel 6. A slider (not shown in the figure) that can slide in the guide groove 7 and the clamping groove 71 is glued and fixed to the inner wall of the heating sleeve 10, and the heating sleeve 10 can be fixed on the rod barrel 6 by sliding the slider from the guide groove 7 to the clamping groove 71.

[0054] Combination Figure 4 and Figure 5 As shown, the heating sleeve 10 is provided with an arc-shaped vent hole 14 arranged along the circumference of the heating sleeve 10, and a sealing film 141 is glued and sealed at the vent hole 14, and the sealing film 141 is made of a plastic film. A cavity 15 is isolated in the heating sleeve 10 by an isolation net 11, and the cavity 15 is connected to the vent hole 14. The mesh of the isolation net 11 is smaller than the diameter of the heating material 12. The right end of the valve cylinder 4 is connected to a hard L-shaped exhaust pipe 5, and a one-way exhaust valve is installed on the exhaust pipe 5. The exhaust pipe 5 includes a radial section and an axial section. The radial section is connected to the side wall of the top of the right end of the valve cylinder 4, and the axial section extends horizontally to the outside of the rod tube 6 and can extend into the vent hole 14. When the heating sleeve 10 is installed on the rod tube 6, the exhaust pipe 5 can squeeze through the sealing film 141 and extend into the vent hole 14. The width of the vent hole 14 is greater than the diameter of the exhaust pipe 5. The one-way valve in this embodiment adopts the one-way valve in the prior art, specifically a valve plate, which can only be opened in one direction.

[0055] A method of using a portable sputum suction device is as follows:

[0056] When this solution is used in the wild or in a non-low temperature environment where there is a lack of electricity or other requirements, there is no need to install the heating sleeve 10 and it can be used directly. When in use, install the sputum suction tube 1 on the joint 3, use the pipe joint 2 of the sputum suction tube 1 to connect with the joint 3 on the valve cylinder 4 (see the prior art), then place the sputum suction tube 1 into the patient's nasal cavity, oral cavity or airway incision, pull the pull rod 8 outward to drive the piston 13 to move, and a negative pressure is formed in the pull rod cylinder 6. At this time, the valve plate at the connection between the valve cylinder 4 and the sputum suction tube 1 opens toward the inside of the valve cylinder 4 under the action of negative pressure, and the sputum in the patient's body can be sucked into the valve cylinder 4 along the sputum suction tube 1. After the sputum enters the valve cylinder 4, the valve plate at the connection between the liquid storage bottle 9 and the valve cylinder 4 opens toward the inside of the liquid storage bottle 9 under the action of the gravity of the sputum, and the sputum flows into the liquid storage bottle 9 for collection. When the piston 13 is pushed back, the gas is first discharged from the exhaust pipe 5 at the top of the valve cylinder 4, and at this time, the valve plate at the connection between the sputum suction tube 1 and the valve cylinder 4 is pressed against the connection under the action of the airflow and cannot be opened, which can prevent the gas from flowing back into the sputum suction tube 1. Since the valve plate at the connection between the liquid storage bottle 9 and the valve cylinder 4 can only be opened in one direction toward the liquid storage bottle 9, the sputum in the liquid storage bottle 9 can be effectively prevented from leaking out.

[0057] When using this solution in a low-temperature outdoor environment, a heating sleeve 10 is required. When in use, after aligning the slider on the heating sleeve 10 with the guide groove 7, push the heating sleeve 10 from the right end of the rod barrel 6 to the left end until the slider slides to the left end of the guide groove 7, rotate the heating sleeve 10, and rotate the slider into the slot 71, thereby installing the heating sleeve 10 on the rod barrel 6. In the process of the heating sleeve 10 sliding to the left end of the guide groove 7, the exhaust pipe 5 squeezes the sealing film 141 and inserts into the vent 14. In the process of the heating sleeve 10 rotating, the exhaust pipe 5 slides in the vent 14, and the sealing film 141 on the vent 14 is completely torn off. After tearing, the outside air can enter the heating sleeve 10 from the vent 14 to react with the heating material 12 to generate heat. At the same time, when the piston 13 is pushed back into the rod barrel 6, the gas in the rod barrel 6 can also be discharged from the exhaust pipe 5 into the heating sleeve 10, increasing the amount of air entering the heating sleeve 10, which can effectively promote the reaction and heating of the heating material 12.

[0058] Embodiment 2:

[0059] Combination Figure 6 As shown, the difference between this embodiment and embodiment 1 is that the cavity 15 is connected with a spiral vent 16, and the vent 16 is arranged along the circumference of the heating sleeve 10. The vent 16 arranged along the circumference of the heating sleeve 10 can increase the amount of outside air entering, and the outside air and the gas discharged from the exhaust pipe 5 penetrate into the heating sleeve 10 and contact the heating material 12, further promoting the reaction of the heating material 12, while improving the reaction uniformity, thereby improving the heating uniformity.

[0060] Embodiment 3:

[0061] Combination Figure 7 As shown, the difference between this embodiment and embodiment 2 is that the exhaust pipe 5 is freely connected with a tapered accelerating air nozzle 17. The tapered accelerating air nozzle 17 reduces the area of ​​the air outlet, which can accelerate the airflow to a certain extent, so that it rushes into the heating sleeve 10 more quickly, so that the gas can diffuse into the heating sleeve 10 more quickly, and the reaction rate is improved. On the other hand, the tapered accelerating air nozzle 17 is sharper, which can ensure that the sealing film 141 is squeezed smoothly.

[0062] Embodiment 4:

[0063] The difference between this embodiment and the embodiment 1 is that the number of exhaust pipes 5, guide grooves 7 and clamping grooves 71 are all two and are symmetrically arranged with the rod barrel 6 as the center, and the number of cavities 15 and vents 14 is also two and matches the two exhaust pipes 5. The two sets of exhaust pipes 5, vents 14 and cavities 15 are provided so that the outside air and the gas in the rod barrel 6 can enter the heating sleeve 10 faster, further improving the heating rate.

[0064] Embodiment 5:

[0065] The difference between this embodiment and embodiment 1 is that the right end of the guide groove is provided with a flared shape, so that the space at the right end of the guide groove can be expanded, making it easier to align the slider with the guide groove.

[0066] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A portable sputum suction device, comprising a valve cylinder, a liquid storage bottle is connected to the bottom of the valve cylinder, and a one-way liquid inlet valve for liquid to flow into the liquid storage bottle is provided at the connection point, a joint is connected to one end of the valve cylinder, and a one-way air inlet valve for air to flow into the valve cylinder is provided at the connection point, the joint is detachably connected to a sputum suction tube, the other end of the valve cylinder is connected to a pull rod cylinder, a piston is slidably connected to the pull rod cylinder, a sealing ring is fixed to the outer periphery of the piston, and the piston is connected to a pull rod, characterized in that: A heating sleeve is detachably connected to the outside of the pull rod cylinder, and the heating sleeve is filled with heating material that self-heats when exposed to air. The valve cylinder is connected to a hard exhaust pipe, and a one-way exhaust valve is provided on the exhaust pipe. A vent hole is opened on the end of the heating sleeve facing the valve cylinder, and the vent hole is sealed with a sealing film. When the heating sleeve is installed on the pull rod cylinder, the exhaust pipe can squeeze through the sealing film and insert into the vent hole.

2. A portable sputum suction device according to claim 1, characterized in that: A dovetail guide groove is opened axially on the outer wall of the pull rod cylinder, and the end of the guide groove is connected to a dovetail clamping groove opened along the circumference of the pull rod cylinder. A slider that can slide in the guide groove and the clamping groove is fixed on the inner wall of the heating sleeve. The exhaust pipe is an L-shaped exhaust pipe, and the exhaust pipe includes a radial section and an axial section. The radial section is connected to the side wall of the valve cylinder, and the axial end extends axially to one side of the pull rod cylinder. The vent is an arc hole arranged along the circumference of the heating sleeve.

3. A portable sputum suction device according to claim 2, characterized in that: The heating material is a granular heating material. A cavity is isolated in the heating sleeve by an isolation net. The cavity is located at the vent and is connected to the vent. The mesh of the isolation net is smaller than the diameter of the heating material.

4. A portable sputum suction device according to claim 3, characterized in that: The cavity is connected with a spiral air passage, and the air passage is arranged along the circumference of the heating sleeve.

5. A portable sputum suction device according to claim 4, characterized in that: The exhaust pipe is freely connected to a tapered accelerator nozzle.

6. A portable sputum suction device according to claim 1, characterized in that: The number of exhaust pipes, guide grooves and clamping grooves is two and they are all symmetrically arranged with the pull rod tube as the center. The number of cavities and vents is also two and they match the two exhaust pipes.

7. The portable sputum suction device according to claim 1, characterized in that: The heat-generating material includes uniformly mixed iron particles, activated carbon particles, zircon particles and sodium chloride particles.

8. The portable sputum suction device according to claim 1, characterized in that: The thickness of the inner wall of the heating jacket is smaller than the thickness of the outer wall.

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