Medical heat and moisture exchanger

Abstract

The utility model relates to medical equipment technical field, concretely relates to a medical heat and moisture exchanger, including the casing, the casing top is equipped with the machine end interface, is equipped with the heat and moisture exchange layer in the casing, the casing bottom is equipped with the patient end interface, the lateral wall of patient end interface is connected with the dosing pipe, the piston is slidably connected in the dosing pipe, the dosing pipe is fixedly connected with the limiting ring in, is equipped with the spring between the piston and limiting ring, is set up in a plurality of through -holes on the piston, the one end of dosing pipe is connected with the adjusting pipe, and the one end of adjusting pipe is equipped with the sealing ring, the utility model discloses utilize the air pressure dynamic change of inspiration process, realize the automatic opening and closing control of through -hole, make the inspiration middle -term completely open and ensure that the atomized medicine high -efficient delivery, the through -hole is closed in advance at the end of inspiration to facilitate the patient absorption residual atomized medicine, like this can reduce the atomized medicine reflux situation when the patient exhales, thereby reduce heat and moisture exchanger blockage and atomized medicine waste situation, guarantee the treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a medical heat and moisture exchanger. Background Technology

[0002] Medical heat and moisture exchangers are key consumables in respiratory therapy. They heat and humidify inhaled air through built-in hygroscopic materials. However, in clinical use, when a nebulizer is connected to the breathing tubing, the patient exhales residual nebulized medication from the patient's respiratory tract and the tubing at the patient's end. This causes some of the nebulized medication to flow back into the heat and moisture exchanger. This medication deposits on the surface of the heat and moisture exchange layer, which not only wastes medical resources but also increases the ventilation resistance of the heat and moisture exchanger, seriously affecting the treatment effect. Therefore, the current technology still has shortcomings and deficiencies. Utility Model Content

[0003] This invention provides a medical heat and humidity exchanger to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a medical heat and humidity exchanger, including a shell, a machine end interface at the top of the shell, a heat and humidity exchange layer inside the shell, a patient end interface at the bottom of the shell, a drug delivery tube connected to the side wall of the patient end interface, the drug delivery tube being made of transparent material, a piston being slidably connected inside the drug delivery tube, a limiting ring fixedly connected inside the drug delivery tube and located inside the piston, a spring being provided between the piston and the limiting ring, and several through holes being opened along the axial direction on the piston; an adjusting tube is threadedly connected to the end of the drug delivery tube away from the patient end interface, and a sealing ring is provided at the end of the adjusting tube near the piston, which can seal the through holes when it abuts against the piston.

[0005] Preferably, the piston has a conical structure, and the angle of the piston's conical surface matches the inclination angle of the sealing ring's contact surface.

[0006] Preferably, the contact surface between the sealing ring and the piston is provided with sealing protrusions located on both sides of the through hole. The sealing protrusions are annular, and the piston is provided with grooves corresponding to the sealing protrusions.

[0007] Preferably, the outer wall of the regulating tube away from the dosing tube is provided with anti-slip texture.

[0008] Preferably, a telescopic rod is fixedly connected between the piston and the limiting ring, and a spring is sleeved on the telescopic rod.

[0009] Preferably, a sealing plug is provided at the end of the regulating tube away from the dosing tube.

[0010] The beneficial effects of this utility model are as follows: (1) By setting the linkage control of piston, spring and sealing ring, this utility model utilizes the dynamic change of air pressure during the inhalation process to realize the automatic opening and closing control of the through hole, so that the through hole is fully open in the middle of the inhalation to ensure efficient delivery of nebulized drugs, and the through hole is closed in advance at the end of the inhalation so that the patient can absorb the residual nebulized drugs. This can reduce the backflow of nebulized drugs when the patient exhales, thereby reducing the blockage of the heat and moisture exchanger and the waste of nebulized drugs, and ensuring the treatment effect; (2) The spring preload can be changed by rotating the adjustment tube, which can flexibly adapt to the differences in respiratory pressure threshold of patients of different ages, thereby expanding the applicable scenarios of the heat and moisture exchanger and meeting the needs of individualized treatment; (3) By setting the telescopic rod, the accuracy and stability of the piston axial movement can be ensured, reducing the sealing failure problem caused by piston tilt, thereby extending the service life of the heat and moisture exchanger. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0013] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0014] Figure 4 This is a schematic diagram of the structure of the regulating tube and sealing ring of this utility model;

[0015] Figure 5 This is a schematic diagram of the piston structure of this utility model.

[0016] Reference numerals: 1. Housing, 2. Machine end interface, 3. Heat and moisture exchange layer, 4. Patient end interface, 5. Drug delivery tube, 6. Piston, 7. Limiting ring, 8. Spring, 9. Through hole, 10. Adjusting tube, 11. Sealing ring, 12. Sealing protrusion, 13. Groove, 14. Anti-slip texture, 15. Telescopic rod, 16. Sealing plug. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] like Figure 1-5As shown, this utility model provides a medical heat and humidity exchanger, including a housing 1. The top of the housing 1 is provided with a machine end interface 2. The housing 1 is provided with a heat and humidity exchange layer 3 inside the housing 1. The bottom of the housing 1 is provided with a patient end interface 4. A drug delivery tube 5 is connected to the side wall of the patient end interface 4. The drug delivery tube 5 is made of transparent material. A piston 6 is slidably connected inside the drug delivery tube 5. A limiting ring 7 located inside the piston 6 is fixedly connected inside the drug delivery tube 5. A spring 8 is provided between the piston 6 and the limiting ring 7. Several through holes 9 are opened along the axial direction on the piston 6. The through holes 9 are evenly distributed around the circumference of the piston 6. In this embodiment, the number of through holes 9 is 6. An adjusting tube 10 is threadedly connected to the end of the drug delivery tube 5 away from the patient end interface 4. A sealing ring 11 is provided at the end of the adjusting tube 10 near the piston 6. When the sealing ring 11 abuts against the piston 6, it can seal the through holes 9.

[0019] Specifically, the position of piston 6 can be observed through the transparent dosing tube 5. Initially, spring 8 presses piston 6 against sealing ring 11, completely sealing the through hole 9. At this time, the internal pressure P0 of housing 1 is atmospheric pressure. During use, the regulating tube 10 is connected to the nebulized drug tubing. When the patient inhales, the internal pressure change of housing 1 occurs in three stages. First, in the initial stage of inhalation, the patient's inhalation causes the internal pressure of housing 1 to drop from P0 to P1. The thrust generated by the pressure difference is less than the preload force of spring 8, so spring 8 presses piston 6 against sealing ring 11, sealing the through hole 9 and preventing the nebulized drug from entering the respiratory tract. Then, in the middle stage of inhalation, the pressure drops from P1 to P2 and then rises back to P1. At this time, the thrust generated by the pressure difference is greater than the preload force of spring 8, causing piston 6 to move towards the limiting ring 7, thus sealing the through hole 9. With the perforation 9 fully exposed, the nebulized medication enters the respiratory tract through the regulating tube 10, the perforation 9, and the patient-end interface 4, facilitating absorption by the patient. Finally, at the end of inspiration, the pressure rises from P1 to P0. At this point, the elasticity of the spring 8 regains dominance, and the piston 6 resets, closing the perforation 9. Since the patient is still in the inspiratory phase, any residual nebulized medication in the patient's respiratory tract and patient-end tubing can be inhaled during inspiration, reducing the risk of reflux during expiration. Furthermore, rotating the regulating tube 10 moves the piston 6 towards the limiting ring 7, compressing the spring 8 and altering its preload. This allows for adaptation to differences in respiratory pressure thresholds among patients of different ages, expanding the applicability of the heat and moisture exchanger and meeting individualized treatment needs.

[0020] In some embodiments, the piston 6 has a conical structure, and the angle of the conical surface of the piston 6 matches the inclination angle of the contact surface of the sealing ring 11, thereby improving the sealing effect and effectively preventing leakage of atomized drugs.

[0021] In some embodiments, the contact surface between the sealing ring 11 and the piston 6 is provided with sealing protrusions 12 located on both sides of the through hole 9. The sealing protrusions 12 are annular, and the piston 6 is provided with grooves 13 corresponding to the sealing protrusions 12. Specifically, the sealing protrusions 12 and grooves 13 cooperate to improve the sealing performance of the sealing ring 11.

[0022] In some embodiments, the outer wall of the regulating tube 10 away from the dosing tube 5 is provided with anti-slip texture 14, which facilitates the rotation of the regulating tube 10.

[0023] In some embodiments, a telescopic rod 15 is fixedly connected between the piston 6 and the limiting ring 7, and a spring 8 is sleeved on the telescopic rod 15. Specifically, the telescopic rod 15 serves as a guide, ensuring the accuracy and stability of the axial movement of the piston 6, reducing the sealing failure problem caused by the misalignment of the piston 6, thereby extending the service life of the heat and humidity exchanger.

[0024] In some embodiments, a sealing plug 16 is provided at the end of the regulating tube 10 away from the drug delivery tube 5. Specifically, when the patient does not require nebulized drug treatment, the regulating tube 10 can be sealed by the sealing plug 16.

[0025] The above embodiments can be combined with each other.

[0026] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A medical heat and moisture exchanger comprising a housing, a machine end interface provided at a top of the housing, a heat and moisture exchange layer provided in the housing, and a patient end interface provided at a bottom of the housing, characterized in that: A drug delivery tube is connected to the side wall of the patient end interface. The drug delivery tube is made of transparent material. A piston is slidably connected inside the drug delivery tube. A limiting ring located inside the piston is fixedly connected inside the drug delivery tube. A spring is provided between the piston and the limiting ring. Several through holes are opened on the piston along the axial direction. The end of the dosing tube furthest from the patient's end is threaded with an adjustment tube. The end of the adjustment tube near the piston is equipped with a sealing ring, which can seal the through hole when it comes into contact with the piston.

2. A medical heat and moisture exchanger according to claim 1, characterized in that: The piston has a conical structure, and the angle of the piston's conical surface matches the inclination angle of the sealing ring's contact surface.

3. A medical heat and moisture exchanger according to claim 2, characterized in that: The sealing ring and the piston have sealing protrusions on their contact surfaces located on both sides of the through hole. The sealing protrusions are annular, and the piston has grooves corresponding to the sealing protrusions.

4. A medical heat and moisture exchanger according to claim 1, characterized in that: The outer wall of the regulating tube away from the dosing tube is provided with anti-slip texture.

5. A medical heat and moisture exchanger according to claim 1, characterized in that: A telescopic rod is fixedly connected between the piston and the limiting ring, and a spring is sleeved on the telescopic rod.

6. A medical heat and moisture exchanger according to claim 1, characterized in that: The end of the regulating tube furthest from the dosing tube is equipped with a sealing plug.

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