Anaesthetic mask capable of reducing water mist

Abstract

The utility model relates to an anaesthetic mask capable of reducing water mist, which relates to the technical field of anaesthetic appliances and comprises a mask main body, an air cushion ring arranged at the edge of the bottom of the mask main body and an air hole formed in the middle of the mask main body. A heating assembly for heating anesthetic gas is arranged on the connecting air cylinder, a gas circulation assembly is further arranged on the inner wall of the mask body and comprises a separation layer arranged on the inner wall of the mask body, and a circulation gap is formed between the separation layer and the mask body. In the gas circulation process, circulation gas is heated through the heating assembly, the gas temperature in the mask body is kept balanced, water mist in the mask can be eliminated through the heating assembly and the gas circulation assembly, and the situation that the sight of a doctor observing the state of a patient is blocked by the water mist is avoided.

Description

Technical Field

[0001] This application relates to the field of anesthesia equipment technology, and in particular to an anesthesia mask that can reduce water mist. Background Technology

[0002] An anesthesia mask is a medical device used in clinical anesthesia, emergency resuscitation, and other scenarios. It mainly establishes a temporary airway by covering the patient's mouth and nose to deliver anesthetic gases, oxygen, or other medical gases to the patient. The anesthesia mask mainly consists of the mask body and the connection interface. During the induction and maintenance phases of general anesthesia, the mask body delivers a mixture of volatile anesthetic drugs and oxygen into the patient's respiratory tract to quickly induce the patient into an anesthetic state or maintain the depth of anesthesia.

[0003] Currently, a patent application published on February 6, 2025, with publication number WO2025025376A1, provides an anesthesia mask, including a mask body. An air vent is located in the middle of the mask body, and an air cylinder is connected to the air vent. A return hole is located on the side wall of the air cylinder. Several overflow holes are distributed in the lower part of the mask body. An annular water collection groove is located on the inner wall of the mask body below the overflow holes. A return pipe communicating with the return hole is located at the outer opening of the overflow hole. A water vapor adsorption component is detachably fitted between the return hole and the return pipe. This solution enables gas circulation and dehumidification within the mask body, and the flowing gas can flow along the inner wall of the mask body, accelerating the airflow speed on the inner wall surface of the mask body, reducing the probability of water droplet formation, and preventing condensed water droplets from landing on the patient's face.

[0004] In related technologies, the temperature of the anesthetic gas introduced through the gas cylinder is usually close to room temperature, generally between 20°C and 30°C, while the temperature of exhaled air is usually close to body temperature (37°C). When warm exhaled air comes into direct contact with the cooler anesthetic gas, a significant temperature difference is created. This temperature difference causes moisture in the air to condense on the surface of the anesthetic mask, forming water mist. This is especially pronounced when the external environment is cold, making the water mist phenomenon more severe. Although existing equipment heats the gas internally, heat loss can still occur during gas transport through the pipes, making it impossible to accurately control the temperature inhaled into the body.

[0005] Therefore, it is necessary to propose an anesthesia mask that can reduce water mist to solve the above problems. Utility Model Content

[0006] This application provides an anesthesia mask that can reduce water mist, in order to improve the technical problem in the related art where the temperature difference between the temperature of the anesthetic gas and the temperature of human exhalation causes moisture in the air to condense on the surface of the anesthesia mask, forming water mist.

[0007] This application provides an anesthesia mask that reduces water mist, including a mask body, an air cushion located at the bottom edge of the mask body, an air hole in the middle of the mask body, a connecting air cylinder detachably mounted on the air hole, a heating component for heating anesthetic gas mounted on the connecting air cylinder, and a gas circulation component mounted on the inner wall of the mask body. The gas circulation component includes a partition layer mounted on the inner wall of the mask body, forming a circulation gap between the partition layer and the mask body. During gas flow, the circulating gas is heated by the heating component to maintain a balanced gas temperature inside the mask body.

[0008] The technical solutions described above in this application embodiment have at least the following technical effects: During the use of the anesthesia mask, by wearing the mask body on the patient's face, the air cushion ring achieves a seal between the mask body and the patient's face. When the anesthetic gas is delivered by the connecting air cylinder, the heating component on the connecting air cylinder preheats the incoming anesthetic gas to a temperature close to body temperature, reducing the temperature difference between the gas and the face and the inner wall of the mask. When the gas temperature is close to the temperature of the contact object, water vapor is difficult to reach the condensation conditions, reducing water mist generation from the source. At the same time, as the anesthetic gas is input from the connecting air cylinder, it drives the gas in the circulation gap to circulate. After the heated gas enters the mask, some of the gas will circulate in the gap. This circulation can make the gas temperature inside the mask more uniform, further inhibiting the condensation of water mist in a localized area.

[0009] In this embodiment, the heating assembly includes a medical heating element disposed inside the connecting air cylinder. A heat-conducting metal part is disposed on the inner wall of the connecting air cylinder at a position corresponding to the position of the medical heating element. A vent hole is provided in the middle of the metal part. The medical heating element is electrically connected to the anesthesia machine through the connecting air cylinder.

[0010] This technical solution integrates a heating element within the connecting cylinder, placing it in direct contact with the flowing anesthetic gas. This short heat transfer path allows for rapid heating of the gas to the target temperature, preventing low-temperature gas from entering the mask due to heating delays. Furthermore, the metal component on the inner wall of the connecting cylinder aligns with the heating element, and a vent hole in the center ensures unobstructed gas flow. The heat from the heating element is first transferred to the metal component, which then evenly distributes the heat across its entire surface into the flowing gas, preventing uneven heating caused by localized heating of the heating element and ensuring a stable gas temperature entering the mask.

[0011] In this embodiment, sealing rings are arranged in an array at the connection point between the outer wall of the connecting air cylinder and the mask body to limit the position of the connecting air cylinder and seal the connection between the connecting air cylinder and the anesthesia mask.

[0012] With this technical solution, slight deviations may occur when the anesthesia mask and the connecting air cylinder are connected due to installation force or minor deformation of components, and a single sealing ring may fail to seal due to localized poor fit. However, in the array design, multiple sealing rings can be fitted to contact surfaces at different locations. Even with slight deviations, the overall sealing performance can be ensured through multi-layered redundant sealing, reducing air leakage problems caused by installation errors.

[0013] In this embodiment, a first water-absorbing element is snapped between the connecting air cylinder and the partition layer.

[0014] With this technical solution, the first water-absorbing component can directly absorb these residual water vapors during the gas circulation process, preventing them from condensing into water mist on the inner wall of the mask or the surface of the separator layer, forming a dual guarantee of temperature control and anti-fogging + water absorption and defogging, making the anti-fogging effect more thorough.

[0015] In this embodiment, a second water-absorbing component is snapped onto the bottom edge of the mask body, and the other end of the second water-absorbing component is snapped onto the bottom edge of the partition layer. A snapping block is provided on the air cushion. The bottom edge of the mask body and the bottom edge of the partition layer are set on the air cushion through the snapping block. A connecting hole is provided on the snapping block so that the circulation gap is connected to the inner wall of the mask body.

[0016] With this technical solution, the second absorbent component is snapped between the bottom of the mask and the separator layer, which can directly absorb residual moisture and condensation in these areas, preventing moisture from condensing into water mist at the bottom edge of the mask. The snap-fit ​​block firmly connects the bottom edge of the mask, the bottom edge of the separator layer, and the air cushion ring, preventing the separator layer from shifting due to patient movement or slight deformation of the mask during use. If the separator layer shifts, it may compress or block the circulation gap, disrupting the gas circulation path and affecting temperature balance. The rigid fixing effect of the snap-fit ​​block ensures the stability of the shape and size of the circulation gap, ensuring that the heated gas can flow smoothly in the gap and maintain a uniform internal temperature of the mask.

[0017] In this embodiment, the connecting air cylinder is equipped with an indicator light that is electrically connected to the medical heating pad.

[0018] This technical solution allows medical staff to clearly see that the medical heating pad is powered on and in operation when the indicator light (e.g., red or green) illuminates. If the indicator light is off, it may indicate a heating pad malfunction, poor circuit contact, or an abnormal power supply to the anesthesia machine. Medical staff can quickly determine if the heating component is functioning correctly using the indicator light, preventing low-temperature gas from entering the mask due to heating failure, which could lead to water vapor, patient discomfort, and other problems, thus ensuring the safety of the treatment process. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of an anesthesia mask that can reduce water mist, provided in an embodiment of this application;

[0020] Figure 2 A cross-sectional structural schematic diagram of an anesthesia mask that can reduce water mist provided in an embodiment of this application;

[0021] Figure 3 A three-dimensional structural diagram of the connecting air cylinder provided in an embodiment of this application;

[0022] Figure 4 This is a cross-sectional structural diagram of the connecting air cylinder provided in an embodiment of this application.

[0023] The following are the labeling elements in the figure:

[0024] 1. Mask body; 11. Air cushion; 12. Air hole; 13. Connecting air cylinder; 14. Sealing ring; 2. Heating component; 21. Medical heating pad; 22. Metal part; 23. Vent hole; 3. Gas circulation component; 31. Separating layer; 32. Circulation gap; 33. First absorbent component; 34. Second absorbent component; 35. Clip block; 36. Connecting hole; 4. Indicator light. Detailed Implementation

[0025] In related technologies, the temperature of the anesthetic gas introduced through the gas cylinder is usually close to room temperature, generally between 20°C and 30°C, while the temperature of exhaled air is usually close to body temperature (37°C). When warm exhaled air comes into direct contact with the cooler anesthetic gas, a significant temperature difference is created. This temperature difference causes moisture in the air to condense on the surface of the anesthetic mask, forming water mist. This is especially pronounced when the external environment is cold, making the water mist phenomenon more severe. Although existing equipment heats the gas internally, heat loss can still occur during gas transport through the pipes, making it impossible to accurately control the temperature inhaled into the body.

[0026] Based on this, in order to improve the technical problem in the related technology that the temperature difference between the temperature of the anesthetic gas and the temperature of human exhalation causes moisture in the air to condense on the surface of the anesthetic mask and form water mist, the embodiments of this application provide the following solution.

[0027] Please refer to the following: Figures 1 to 4 This application provides an anesthesia mask that can reduce water mist. The anesthesia mask that can reduce water mist includes a mask body 1, an air cushion 11 disposed at the bottom edge of the mask body 1, an air hole 12 opened in the middle of the mask body 1, a connecting air cylinder 13 detachably disposed on the air hole 12, a heating component 2 for heating anesthetic gas disposed on the connecting air cylinder 13, and a gas circulation component 3 disposed on the inner wall of the mask body 1. The gas circulation component 3 includes a partition layer 31 disposed on the inner wall of the mask body 1, and a circulation gap 32 is formed between the partition layer 31 and the mask body 1. During the gas flow, the circulating gas is heated by the heating component 2 to maintain the gas temperature inside the mask body 1.

[0028] The anesthesia mask provided in this embodiment reduces water mist. During use, the mask body 1 is worn on the patient's face, and the air cushion 11 ensures a seal between the mask body 1 and the patient's face. When anesthetic gas is delivered by the connecting air cylinder 13, the heating component 2 on the connecting air cylinder 13 preheats the incoming anesthetic gas to a temperature close to body temperature, reducing the temperature difference between the gas and the face and the inner wall of the mask. When the gas temperature is close to the temperature of the contact object, water vapor is unlikely to condense, reducing water mist generation at the source. At the same time, as the anesthetic gas is input from the connecting air cylinder 13, it drives the gas in the circulation gap 32 to circulate. After the heated gas enters the mask, some of the gas circulates in the gap. This circulation makes the gas temperature inside the mask more uniform, further inhibiting the condensation of water mist in certain areas. This mask, through a combination strategy of "heating and temperature control + circulation and temperature uniformity," solves the core cause of water mist generation (temperature difference) at the physical level, ensuring the visibility and safety of medical operations while improving the patient's user experience.

[0029] In this embodiment, the heating component 2 includes a medical heating element 21 disposed inside the connecting air cylinder 13. A heat-conducting metal part 22 is disposed on the inner wall of the connecting air cylinder 13 at a position corresponding to the position of the medical heating element 21. A vent hole 23 is provided in the middle of the metal part 22. The medical heating element 21 is electrically connected to the anesthesia machine through the connecting air cylinder 13.

[0030] With this configuration, the heating element is built into the connecting cylinder 13, directly contacting the flowing anesthetic gas. The short heat transfer path allows for rapid heating of the gas to the target temperature. The heating element is equipped with a temperature sensor (such as a thermocouple or NTC thermistor) and a temperature control chip to monitor the temperature of the flowing gas and the heating element itself in real time. When the gas temperature is below the target value, the temperature control system immediately increases the heating element's power (by adjusting the current or voltage) to increase heat output; when it approaches the target temperature, the power is reduced to maintain a constant temperature. This prevents low-temperature gas from entering the mask due to heating delays. Furthermore, the metal part 22 on the inner wall of the connecting cylinder 13 corresponds to the heating element and has a vent 23 in the center to ensure unobstructed gas flow. The heat from the heating element is first transferred to the metal part 22, and then the metal part 22 distributes the heat evenly to the flowing gas through its entire surface, avoiding uneven heating of the gas due to local heating of the heating element, and ensuring that the temperature of the gas entering the mask is stable. At the same time, the anesthesia machine has an external temperature sensor and protection device for the medical heating element 21, which will cut off the power in time if the medical heating element 21 overheats or is damaged.

[0031] In this embodiment, sealing rings 14 are arranged in an array on the outer wall of the connecting air cylinder 13 at the connection point with the anesthesia mask, so as to limit the position of the connecting air cylinder 13 and seal the connection between the connecting air cylinder 13 and the anesthesia mask.

[0032] With this setup, the connection between the anesthesia mask and the connecting air cylinder 13 may experience slight deviations due to installation force or minor deformation of components, and a single sealing ring 14 may fail to seal due to localized poor fit. However, in the array design, multiple sealing rings 14 can be individually fitted to contact surfaces at different locations. Even with slight deviations, the overall sealing performance can be ensured through multi-layered redundant sealing, reducing air leakage problems caused by installation errors.

[0033] In this embodiment, a first water-absorbing element 33 is snapped between the connecting air cylinder 13 and the partition layer 31.

[0034] With this configuration, the first absorbent component 33, such as medical absorbent cotton or super absorbent resin, does not obstruct gas flow. During the gas circulation process, it absorbs water vapor and can directly absorb these residual water vapors, preventing them from condensing into water mist on the inner wall of the mask or the surface of the separator layer 31. This forms a dual guarantee of "temperature control and anti-fogging + water absorption and defogging", making the anti-fogging effect more thorough. The snap-fit ​​method facilitates the disassembly and replacement of the first absorbent component 33.

[0035] In this embodiment, a second absorbent component 34 is snapped onto the bottom edge of the anesthesia mask, and the other end of the second absorbent component 34 is snapped onto the bottom edge of the partition layer 31. A snapping block 35 is provided on the air cushion 11. The bottom edge of the anesthesia mask and the bottom edge of the partition layer 31 are set on the air cushion 11 through the snapping block 35. A connecting hole 36 is provided on the snapping block 35 so that the circulation gap 32 is connected to the inner wall of the mask body 1.

[0036] With this configuration, the second absorbent component 34 is snapped between the bottom of the mask and the partition layer 31, directly absorbing residual moisture and condensation in these areas. This prevents moisture from condensing into water mist at the bottom edge of the mask. The snap-fit ​​block 35 firmly connects the bottom edge of the mask, the bottom edge of the partition layer 31, and the air cushion 11, preventing the partition layer 31 from shifting due to patient movement or slight deformation of the mask during use. If the partition layer 31 shifts, it may compress or block the circulation gap 32, disrupting the gas circulation path and affecting temperature balance. The rigid fixing effect of the snap-fit ​​block 35 ensures the stability of the shape and size of the circulation gap 32, guaranteeing that the heated gas can flow smoothly in the gap and maintain a uniform temperature inside the mask. In this way, the first and second absorbent blocks together adsorb and dehumidify the circulating gas, forming a three-dimensional water absorption system of "upstream interception + downstream adsorption," further reducing the probability of water mist formation and making the anti-fog effect more comprehensive.

[0037] In this embodiment, the connecting air cylinder 13 is equipped with an indicator light 4 that is electrically connected to the medical heating pad 21.

[0038] With this setup, when indicator light 4 is lit (e.g., red or green), it clearly indicates to medical staff that "the medical heating pad 21 is powered on and has started working." If indicator light 4 is not lit, there may be problems such as a faulty heating pad, poor circuit contact, or abnormal power supply to the anesthesia machine. Medical staff can quickly determine whether the heating component 2 is operating normally through indicator light 4, avoiding the entry of low-temperature gas into the mask due to heating failure, which could lead to water vapor, patient discomfort, and other problems, thus ensuring the safety of the treatment process.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An anesthesia mask that reduces water mist, comprising a mask body (1), an air cushion (11) disposed at the bottom edge of the mask body (1), and an air hole (12) opened in the middle of the mask body (1), characterized in that: A connecting air cylinder (13) is detachably provided on the air hole (12). A heating component (2) for heating anesthetic gas is provided on the connecting air cylinder (13). A gas circulation component (3) is also provided on the inner wall of the mask body (1). The gas circulation component (3) includes a partition layer (31) provided on the inner wall of the mask body (1). A circulation gap (32) is formed between the partition layer (31) and the mask body (1). During the gas flow, the circulating gas is heated by the heating component (2) to maintain the gas temperature inside the mask body (1).

2. The anesthesia mask with reduced water mist according to claim 1, characterized in that: The heating assembly (2) includes a medical heating element (21) disposed inside a connecting air cylinder (13). A heat-conducting metal part (22) is disposed on the inner wall of the connecting air cylinder (13) at a position corresponding to the position of the medical heating element (21). A ventilation hole (23) is provided in the middle of the metal part (22). The medical heating element (21) is electrically connected to the anesthesia machine through the connecting air cylinder (13).

3. The anesthesia mask with reduced water mist according to claim 2, characterized in that: A sealing ring (14) is arranged in an array at the connection point between the outer wall of the connecting air cylinder (13) and the mask body (1) to limit the position of the connecting air cylinder (13) and seal the connection between the connecting air cylinder (13) and the mask body (1).

4. An anesthesia mask for reducing water mist according to claim 1, 2, or 3, characterized in that: A first water-absorbing element (33) is snapped between the connecting air cylinder (13) and the separating layer (31).

5. An anesthesia mask with reduced water mist according to claim 4, characterized in that: The bottom edge of the mask body (1) is fitted with a second water-absorbing component (34), and the other end of the second water-absorbing component (34) is fitted with the bottom edge of the partition layer (31). The air cushion (11) is provided with a snap-fit ​​block (35). The bottom edge of the mask body (1) and the bottom edge of the partition layer (31) are set on the air cushion (11) through the snap-fit ​​block (35). The snap-fit ​​block (35) is provided with a connection hole (36) so that the circulation gap (32) is connected to the inner wall of the mask body (1).

6. An anesthesia mask with reduced water mist according to claim 2, characterized in that: The connecting air cylinder (13) is equipped with an indicator light (4) that is electrically connected to the medical heating pad (21).

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