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CN-116407716-B - Ventilation device, ventilation system, and ventilation method

CN116407716BCN 116407716 BCN116407716 BCN 116407716BCN-116407716-B

Abstract

The invention relates to a ventilation device, a ventilation system and a ventilation method, which are used for providing compensation gas so that the ventilation device can meet the ventilation requirement. The ventilation device comprises the ventilation catheter and the valve body arranged on the ventilation catheter, when the pressure in the ventilation catheter is smaller than the external pressure, namely, the phenomenon that the ventilation catheter is extruded somewhere is possibly shown, when the convergence section is opened, the communication section and the convergence section can form a second passage for providing compensation gas into the ventilation catheter, so that the compensation gas can be provided into the ventilation catheter through the second passage, and the gas can be simultaneously provided through the first passage and the second passage, so that the ventilation volume of the ventilation catheter is not reduced due to the extrusion of the ventilation catheter, and the requirement of meeting the ventilation volume is ensured.

Inventors

  • LIU LINA
  • ZHOU MINGZHAO
  • ZHUANG ZHI

Assignees

  • 天津怡和嘉业医疗科技有限公司

Dates

Publication Date
20260505
Application Date
20211231

Claims (16)

  1. 1. A venting device comprising a venting conduit and a valve body disposed on the venting conduit, the venting conduit forming a first passageway for providing gas to a user; The valve body comprises a communication section communicated with the outside and a convergence section connected with the communication section, and the convergence section is arranged in the ventilation catheter; Wherein the valve body is configured such that the converging section opens when the pressure in the airway tube is less than an external pressure such that the communicating section and the converging section form a second passageway that provides make-up gas into the airway tube and the converging section closes when the pressure in the airway tube is equal to or greater than the external pressure; An opening is formed at one end, close to the ventilation catheter, of the convergent section, the convergent section is configured to enable the opening to be in a normally closed state, when the pressure outside the ventilation catheter is higher than the pressure inside the ventilation catheter, the convergent section is acted by force from top to bottom, the convergent section deforms to enable the opening to be opened under the action of the pressure, and therefore the opening and the communication section form a second passage communicated, and external air enters a first passage of the ventilation catheter through the second passage; When the pressure outside the ventilation catheter is lower than or equal to the pressure inside, the bottom of the convergence section enables the opening to be in a normally closed state under the action of the pressure and the self-restoring force, so that the second passage is disconnected.
  2. 2. The ventilator according to claim 1, wherein the convergent section has an elliptical radial cross section, and the ratio n of the inner diameter d Long length of the convergent section in the direction of its major axis to the inner diameter d Short length in the direction of its minor axis is in the range of 20-100.
  3. 3. The ventilator according to claim 2, wherein the inside diameter d Short length of the convergent section in the direction of its minor axis is in the range of 0.1-1.5mm.
  4. 4. A ventilation device according to claim 3, wherein when the inner diameter d Long length of the convergent section in the direction of its major axis is determined based on the inner diameter d Short length of the convergent section in the direction of its minor axis and the ratio n, the value of the ratio n is close to the minimum value of its range if the value of the inner diameter d Short length is close to the maximum value of its range, and the value of the ratio n is close to the minimum value of its range if the value of the inner diameter d Short length is close to the minimum value of its range.
  5. 5. A ventilator according to claim 3, wherein the convergent section has an inner diameter d Short length in its minor axis direction of 0.1mm and the ratio n is 100, or The inner diameter d Short length of the convergent section in its short axis direction is 1.5mm and the ratio n is 20.
  6. 6. The vent apparatus of any one of claims 1-5, wherein the communication section has a hardness greater than the hardness of the converging section, or The wall thickness of the communicating section is greater than the wall thickness of the converging section.
  7. 7. The vent according to any one of claims 1 to 5, wherein the communication section is configured in a columnar structure, one end of the communication section is in an open structure, and the other end of the communication section is connected to the convergent section through a transition section.
  8. 8. The vent of claim 7, wherein the transition section is configured as a cone-like structure having a smooth profile.
  9. 9. The vent of claim 7, wherein the converging section is made of a material having elastic contractibility.
  10. 10. The vent apparatus of any one of claims 1-5, wherein the vent conduit comprises a main conduit for delivering gas, the valve body being disposed on a sidewall of the main conduit, Wherein the number of the valve bodies is at least two.
  11. 11. The vent apparatus of any one of claims 1-5, wherein the vent conduit is further provided with a first port for connection to a gas source, the valve body being disposed at the first port, Wherein the number of the valve bodies is at least one.
  12. 12. The vent apparatus of claim 11, wherein the valve body is symmetrically disposed about a center of the first port.
  13. 13. The vent apparatus of claim 12, wherein the valve body is disposed at equal angles in a circumferential direction of the first port.
  14. 14. The ventilation device according to any one of claims 1-5, wherein a second port for connection to a ventilation mask is further provided on the ventilation catheter, the valve body being provided at the second port, Wherein the number of the valve bodies is at least one.
  15. 15. A venting device as defined in any one of claims 1-5, wherein the valve body is integrally formed with the venting conduit or the valve body is mechanically connected to the venting conduit.
  16. 16. A ventilation system comprising the ventilation device of any one of claims 1-15, further comprising a gas source and a ventilation mask, the ventilation device being connected to the gas source and the ventilation mask, respectively.

Description

Ventilation device, ventilation system, and ventilation method Technical Field The invention relates to the technical field of ventilation systems, in particular to a ventilation device, a ventilation system and a ventilation method. Background Ventilation masks can provide ventilation gas to users, and are generally classified into four types, nasal masks that cover only the nose, oral masks that cover only the mouth, oral-nasal masks that cover both the mouth and nose (also known as full face masks), and nose-pad masks that are plugged into the nostrils. The face is worn by the mask system, and the mask system is positioned at a relatively comfortable position of the face through the head belt assembly, so that the comfort of wearing the mask system is ensured, and the conditioning, improving and treating functions of the mask system are better realized. The headgear assembly is the primary assembly that connects the mask system to the human head, and because of the large individual head differences, a better comfort, fit and adequate flexibility of the headgear assembly is required. Therefore, the reasonable structure of the head band assembly can enable most patients wearing the mask to obtain a use state with good comfort and sealing performance. In recent years, the headgear assembly used for the nose pad mask and the nose mask has evolved from traditional fabrics to ventilation, namely, the headgear assembly is changed from the functions of connecting and positioning a body to an air path transmission component of a mask system, and the headgear assembly has a part of ventilation function of the mask system, and the main stream is made of silica gel. The ventilation head bands are mostly double-sided head bands (a few single-sided ventilation or other asymmetric ventilation) and are connected with the air source generating device at the top part of the head, and the double-sided head bands are connected with the mask system to assist the single-sided rear head bands. However, when a user wearing the ventilation mask is in a sleeping state, the user can lie on his or her side (both sides are possible), and even can lie on his or her back, and the ventilation headband of the prior art cannot ensure that the ventilation headband can work normally in every posture. For example, in the case of a user lying on his side (recumbent), part of the air path may be put in compression. In order to ensure wearing comfort, the headband in contact with the skin of a user is made of softer materials, so that if the air path of the headband is in a compressed state, the ventilation amount is inevitably influenced, and the requirement of the ventilation amount cannot be met. Disclosure of Invention The invention provides a ventilation device, a ventilation system and a ventilation method, which are used for providing compensation gas so that the ventilation device can meet the ventilation requirement. The invention provides a ventilation device, comprising a ventilation catheter and a valve body arranged on the ventilation catheter, wherein the ventilation catheter forms a first passage for providing gas to a user; The valve body comprises a communication section communicated with the outside and a convergence section connected with the communication section, and the convergence section is arranged in the ventilation catheter; Wherein the valve body is configured such that the converging section opens when the pressure in the airway tube is less than an external pressure such that the communicating section and the converging section form a second passageway that provides make-up gas into the airway tube and the converging section closes when the pressure in the airway tube is equal to or greater than the external pressure. In one embodiment, the convergent section has an elliptical radial cross section, and the ratio n of the inner diameter d Long length of the convergent section in the major axis direction to the inner diameter d Short length in the minor axis direction is in the range of 20-100. In one embodiment, the inner diameter d Short length of the convergent section in the direction of its minor axis is in the range of 0.1-1.5mm. In one embodiment, when determining the inner diameter d Long length of the convergent section in the direction of the minor axis thereof according to the inner diameter d Short length of the convergent section in the direction of the minor axis thereof and the ratio n, if the value of the inner diameter d Short length is close to the maximum value in the range of the inner diameter d Short length , the value of the ratio n is close to the minimum value in the range of the inner diameter d Short length , and if the value of the inner diameter d Short length is close to the minimum value in the range of the inner diameter d Short length , the value of the ratio n is close to the minimum value in the range of the inner diameter d Long length . In one embodiment, the co