Patient interface devices and ventilation therapy equipment

Abstract

The present invention relates to the field of ventilation therapy equipment, and discloses a patient interface device and ventilation therapy equipment. The patient interface device is used for ventilation therapy equipment, and includes a main body and a first moisture derivation member. The interior of the main body defines a gas chamber, and the gas chamber is used to communicate with the patient's mouth and / or nose. The first moisture derivation member is installed on the main body and includes a first part that communicates with the gas chamber and a second part located outside the main body. The first moisture derivation member is configured to absorb moisture in the gas chamber through the first part and conduct the moisture to the second part. The patient interface device of the present invention is capable of derivation of moisture in the gas chamber to the outside of the main body by arranging the first moisture derivation member on the main body, and automatically removing condensed water in the gas chamber, thereby improving the safety of ventilation therapy and reducing the labor intensity of medical staff.

Description

Technical Field

[0001] The present invention relates to the field of ventilation therapy equipment, and in particular to a patient interface device and a ventilation therapy equipment comprising the patient interface device. Background Art

[0002] Non-invasive positive pressure ventilation has been widely used in the treatment of diseases such as obstructive sleep apnea (OSA) and chronic obstructive pulmonary emphysema (COPD). It no longer requires a tube to be inserted into the patient's airway through surgery, but instead uses a blower to deliver a continuous pressure ventilation (CPAP) or variable pressure ventilation to the patient's airway through a tube and a patient interface device.

[0003] Patient interface devices in non-invasive ventilation therapy usually include nasal oxygen catheters and respiratory masks such as nasal masks, oronasal masks and full-face masks. Regardless of whether it is a nasal oxygen catheter or a respiratory mask, there is a gas chamber for connecting with the patient's mouth and / or nose to supply air to the patient. During the treatment process, since the gas inhaled and exhaled by the patient contains water vapor, the water vapor can easily condense in the gas chamber to produce condensed water, and too much condensed water can pose a potential threat to the patient.

[0004] Since the patient interface devices currently on the market do not have the function of automatically removing condensed water, medical staff need to actively intervene, which makes the use very inconvenient and also increases the labor intensity of medical staff. Therefore, it is necessary to propose a patient interface device that can automatically remove condensed water to improve the safety of ventilation treatment and reduce the labor intensity of medical staff. Summary of the invention

[0005] An object of the present invention is to provide a patient interface device and a ventilation therapy apparatus including the patient interface device to solve the above problems.

[0006] In order to achieve the above-mentioned objectives, on the one hand, the present invention provides a patient interface device for use in ventilation therapy equipment, the patient interface device comprising a main body and a first moisture derivation member, the interior of the main body defines a gas chamber, the gas chamber is used to communicate with the patient's mouth and / or nose, the first moisture derivation member is installed on the main body and comprises a first part communicating with the gas chamber and a second part located outside the main body, the first moisture derivation member is configured to absorb moisture in the gas chamber through the first part and conduct the moisture to the second part.

[0007] Optionally, the patient interface device comprises a headband for fixing the main body to the patient's head, and the first moisture deflector forms a part of the headband or forms the entire headband.

[0008] Optionally, the first moisture deflector comprises a fixedly stacked water-absorbing layer and a waterproof layer, and the waterproof layer is arranged close to a side of the headband for contacting the patient's head.

[0009] Optionally, the water-absorbing layer is made of fabric or water-absorbing dressing.

[0010] Optionally, the waterproof layer is made of plastic or rubber.

[0011] Optionally, the patient interface device is a nasal oxygen catheter, the main body includes a nasal connector and an adapter installed on the nasal connector, the first moisture derivation component is installed on the nasal connector, the gas chamber is defined by the first part, the nasal connector and the adapter, and the adapter can pass gas from a gas source into the gas chamber.

[0012] Optionally, the nasal connector includes a mounting structure for mounting the adapter, the mounting structure includes a accommodating cavity with a bottom opening and a top wall and a rear wall for defining the accommodating cavity, the first part is mounted on the inner surface of the rear wall, the adapter includes a shell with a top opening and a rear opening, the shell is sealed and mounted in the accommodating cavity through the bottom opening of the mounting structure, and the gas chamber is defined and formed by the shell, the top wall and the first part.

[0013] Optionally, the nasal connection piece includes a nasal plug for inserting into the nasal cavity, and the nasal plug is configured to extend upward from the top wall and communicate with the gas chamber.

[0014] Optionally, the nasal connector includes two connecting walls extending outward from the left and right ends of the rear wall respectively, and the connecting walls are provided with through holes along the extension direction thereof. The second part of the first moisture derivation member is configured to extend from one end of the first part through the two connecting walls and then be connected to the other end of the first part.

[0015] Another aspect of the present invention provides a ventilation therapy device, which includes a host as a gas source, a ventilation pipeline, and the patient interface device mentioned above, wherein the host is connected to the patient interface device via the ventilation pipeline.

[0016] Optionally, the ventilation therapy device includes a second moisture decompression component, which is installed in the ventilation duct and includes an in-tube part located in the ventilation duct and an out-tube part located outside the ventilation duct, and the second moisture decompression component is configured to absorb moisture in the ventilation duct through the in-tube part and conduct the moisture to the out-tube part.

[0017] Optionally, the ventilation circuit includes a first circuit and a second circuit connected to one end of the first circuit, the end of the first circuit facing away from the second circuit is connected to the patient interface device, the end of the second circuit facing away from the first circuit is connected to the host, the inner tube portion is connected to the inner wall of the first circuit, the outer tube portion is connected to the outer wall of the second circuit, and the second circuit is a heating circuit.

[0018] The patient interface device of the present invention is capable of discharging moisture in the gas chamber to the outside of the main body by arranging a first moisture outlet component on the main body, automatically removing condensed water in the gas chamber, thereby improving the safety of ventilation treatment and reducing the labor intensity of medical staff.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 is a schematic structural diagram of an embodiment of a patient interface device of the present invention, wherein the first moisture deflection member forms the entire headband;

[0022] Figure 2 yes Figure 1 Exploded diagram of

[0023] Figure 3 yes Figure 1 A schematic diagram of the first moisture outlet member;

[0024] Figure 4 yes Figure 2 A longitudinal sectional view of the invention, wherein the second portion of the first moisture outlet member is omitted;

[0025] Figure 5 yes Figure 1 A longitudinal sectional view of the invention, wherein the second portion of the first moisture outlet member is omitted;

[0026] Figure 6 is a schematic structural diagram of an embodiment of a ventilation therapy device in the present invention, wherein only a patient interface device and a ventilation circuit are shown;

[0027] Figure 7 yes Figure 6 A partial cross-sectional view of

[0028] Figure 8is a structural schematic diagram of another embodiment of the ventilation therapy device of the present invention, wherein only the patient interface device and the ventilation circuit are shown, the ventilation circuit is partially cut away and the second circuit is not fully shown;

[0029] Fig. 9 yes Figure 8 A partial enlarged view of the central ventilation pipeline.

[0030] Description of Reference Numerals

[0031] 10-main body, 101-gas chamber, 11-nasal connector, 111-top wall, 112-rear wall, 113-nasal plug, 114-connecting wall, 115-first flange, 116-second flange, 117-first fixing belt, 118-second fixing belt, 12-adapter, 121-shell, 122-top opening, 123-rear opening, 124-interface, 125-first groove, 126-second groove, 20-first moisture derivation part, 201-water absorption layer, 202-waterproof layer, 21-first part, 22-second part, 30-ventilation pipeline, 31-first pipeline, 32-second pipeline, 40-second moisture derivation part, 41-inner part of the tube, 42-outer part of the tube. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0033] In the present invention, unless otherwise stated, the directional words such as "upper, lower, top, bottom, left, right, back" generally refer to the position of the patient when using the device in a standing position. "Inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0034] On the one hand, the present invention provides a patient interface device for use in ventilation therapy equipment, wherein the patient interface device includes a main body 10 and a first moisture decompression component 20. The interior of the main body 10 defines a gas chamber 101, and the gas chamber 101 is used to communicate with the patient's mouth and / or nose. The first moisture decompression component 20 is installed on the main body 10 and includes a first part 21 that communicates with the gas chamber 101 and a second part 22 located outside the main body 10. The first moisture decompression component 20 is configured to absorb moisture in the gas chamber 101 through the first part 21 and conduct the moisture to the second part 22.

[0035] In the above, it should be noted that the first part 21 can communicate with the gas chamber 101 in a variety of ways. For example, the first part 21 can be directly placed in the gas chamber 101, or can be used as a part of the gas chamber 101. In addition, the first moisture outlet 20 is an integral part. The moisture in the gas chamber 101 can include water vapor in the gas inhaled by the patient, water vapor in the gas exhaled by the patient, and condensed water generated in the gas chamber 101.

[0036] When in use, the first part 21 of the first moisture outlet 20 absorbs moisture in the gas chamber 101 and diffuses the moisture to the second part 22. Since the second part 22 is located in the external environment of the main body 10 and the humidity of the external environment is low and relatively dry, the moisture in the second part 22 will continue to evaporate into the external environment.

[0037] The patient interface device of the present invention is capable of discharging moisture in the gas chamber 101 to the outside of the main body 10 by setting a first moisture outlet component 20 on the main body 10, automatically removing condensed water in the gas chamber 101, thereby improving the safety of ventilation treatment and reducing the labor intensity of medical staff.

[0038] In the present invention, the first moisture deflector 20 may be an additional component or may be attached to other components of the patient interface device. Since the patient interface device generally includes a headband for fixing the main body 10 to the patient's head, according to one embodiment of the present invention, the first moisture deflector 20 may form a part of the headband or the entire headband (see Figure 1-Figure 3 ).

[0039] Since the headband will contact the patient's head when the patient interface device is worn on the patient's head, in order to improve the patient's wearing comfort, the first moisture derivation member 20 may include a fixedly stacked water-absorbing layer 201 and a waterproof layer 202, and the waterproof layer 202 is arranged near the side of the headband that is used to contact the patient's head. It can be understood that the first moisture derivation member 20 with the waterproof layer 202 is suitable for the case where the first moisture derivation member 20 contacts the patient's head. In other embodiments, the first moisture derivation member 20 may only include the water-absorbing layer 201.

[0040] In the present invention, the waterproof layer 202 of the first moisture outlet 20 can be made of water-impermeable materials such as plastic or rubber. In order to improve the wearing comfort, the waterproof layer 202 is preferably made of softer materials such as silica gel. The water-absorbing layer 201 of the first moisture outlet 20 can be made of fabric or water-absorbing dressing, and the water-absorbing layer 201 can be a single-layer or multi-layer structure. In addition, when the first part 21 is used to define the gas chamber 101, the water-absorbing layer located in the first part 21 preferably has the characteristics of good water absorption but large air permeability resistance, so as to reduce the loss of gas for patient inhalation and improve the sealing of the gas chamber 101. In other words, the first part 21 and the second part 22 of the first moisture outlet 20 can be made of different materials.

[0041] In the present invention, the patient interface device may be a nasal oxygen catheter or a breathing mask such as a nasal mask, an oronasal mask, or a full-face mask, etc. The present invention is further described below by taking a nasal oxygen catheter as an example.

[0042] like Figure 1 The nasal oxygen catheter shown in the figure has a main body 10 including a nasal connector 11 and an adapter 12 installed on the nasal connector 11, a first moisture derivation component 20 installed on the nasal connector 11, a gas chamber 101 defined by the first portion 21, the nasal connector 11 and the adapter 12, and the adapter 12 can pass gas from a gas source into the gas chamber 101.

[0043] In the above, it can be understood that the nasal connector 11 is a part used to connect to the patient's nasal cavity; the air source is a device that produces pressurized air or breathable gas, for example, it can be a host in a ventilation therapy device. In addition, the nasal connector 11 can be made of a flexible material (such as silicone), and the adapter 12 can be made of a material harder than the nasal connector 11 (such as plastic) to support the nasal connector 11, so that the nasal connector 11 is not easily deformed while being comfortable to wear, thereby ensuring the ventilation volume of the nasal oxygen catheter and improving the reliability of nasal oxygen catheter ventilation.

[0044] Furthermore, if Figure 4 and Figure 5As shown, the nasal connection piece 11 may include a mounting structure for mounting the adapter 12, the mounting structure includes a receiving cavity with a bottom opening and a top wall 111 and a rear wall 112 for defining the receiving cavity, the first part 21 is mounted on the inner surface of the rear wall 112, the adapter 12 includes a shell 121 with a top opening 122 and a rear opening 123, the shell 121 is sealed and mounted in the receiving cavity through the bottom opening of the mounting structure, and the gas chamber 101 is defined and formed by the shell 121, the top wall 111 and the first part 21. In the above, it can be understood that the top wall 111 blocks the top opening 122 of the shell 121, and the first part 21 blocks the rear opening 123 of the shell 121.

[0045] In the above, the housing 121 is sealed and installed in the accommodating cavity, which means that there is no gap between the outer wall of the housing 121 and the top wall 111 and the rear wall 112 (see Figure 5 ). Furthermore, the housing 121 and the top wall 111 and the rear wall 112 can be connected by means of a matching structure of flanges and grooves, thereby improving assembly reliability and air tightness. Figure 4 and Figure 5 As shown, the top wall 111 is provided with a first flange 115 extending downward from the edge of the top wall 111, and the outer wall of the shell 121 is provided with a first groove 125 that matches the first flange 115; the rear wall 112 is provided with a second flange 116 extending forward from the inner surface of the rear wall 112, and the outer wall of the shell 121 is provided with a second groove 126 that matches the second flange 116. In addition, as Figure 5 As shown, a mounting groove for the first part 21 to be embedded may be defined between the second flange 116 and the top wall 111 .

[0046] In the present invention, when the first moisture outlet member 20 is formed as a headband, in order to strengthen the connection between the first moisture outlet member 20 and the nasal cavity connecting member 11, as shown in FIG. Figure 2 As shown, the nasal connection member 11 may include two connection walls 114 extending outward from the left and right ends of the rear wall 112, respectively, and the connection walls 114 are provided with through holes along the extension direction thereof, and the second portion 22 of the first moisture outlet member 20 is provided to extend from one end of the first portion 21 through the two connection walls 114 and then be connected to the other end of the first portion 21. It should be noted that during manufacturing, the first moisture outlet member 20 may be injection molded together with the nasal connection member 11.

[0047] In addition, if Figure 4 and Figure 5 As shown, the nasal connection member 11 may further include a nasal plug 113 for inserting into the nasal cavity, and the nasal plug 113 is configured to extend upward from the top wall 111 and communicate with the gas chamber 101. It can be understood that there are two nasal plugs 113.

[0048] In the present invention, Figure 1 As shown, the adapter 12 may also include an interface 124 for connecting to the ventilation pipeline 30 of the gas source, and the interface 124 is arranged on the housing 121 and communicates with the gas chamber 101. When in use, the gas from the gas source enters the gas chamber 101 through the ventilation pipeline 30 and the interface 124, and then enters the user's nasal cavity through the top opening 122 of the housing 121 and the nasal plug 113.

[0049] In addition, in order to improve the reliability of the assembly of the adapter 12 and the nasal connector 11 and further improve the airtightness of the nasal oxygen catheter, the nasal connector 11 may also include a fixing member for fixing the adapter 12 to the mounting structure.

[0050] The fixing member may be a fixing belt whose two ends are respectively connected to the top wall 111 and the rear wall 112 to form a space for the adapter 12 to pass through. Figure 1 and Figure 2 As shown, the fixing belt may include a fixing belt along the direction of insertion of the adapter 12 (i.e. Figure 2 The first fixing belt 117 and the second fixing belt 118 are spaced apart from each other (in the direction from left to right in the middle). The circumferential profile of the shell 121 can be set to gradually decrease along its insertion direction. Accordingly, the insertion space formed by the first fixing belt 117 is larger than the insertion space formed by the second fixing belt 118. In this way, when the adapter 12 is installed on the nasal connector 11, the right end of the shell 121 can easily pass through the first fixing belt 117 and then be inserted into the second fixing belt 118, and the assembly is very simple. In addition, in order to prevent the end of the adapter 12 that cooperates with the second fixing belt 118 from tilting up and causing gas leakage, the end of the second fixing belt 118 away from the first fixing belt 117 can be formed into a closed shape (see Figure 2 ). At this time, the adapter 12 can only be inserted and fixed from the left side of the first fixing belt 117, but cannot be inserted from the right side of the second fixing belt 118.

[0051] Another aspect of the present invention provides a ventilation therapy device, which includes the patient interface device described above.

[0052] In the present invention, the ventilation therapy equipment may be a ventilator, a high-flow therapy device, etc.

[0053] The ventilation therapy device may further include a host as an air source and a ventilation line 30, and the host may be connected to the patient interface device via the ventilation line 30. Specifically, when the patient interface device is a nasal oxygen catheter, one end of the ventilation line 30 may be connected to the air outlet of the host, and the other end of the ventilation line 30 may be connected to the interface 124 of the nasal oxygen catheter transfer connector 12.

[0054] In the present invention, the ventilation therapy device may further include a second moisture decompression component 40, which is installed on the ventilation duct 30 and includes an inner tube portion 41 located in the ventilation duct 30 and an outer tube portion 42 located outside the ventilation duct 30. The second moisture decompression component 40 is configured to absorb moisture in the ventilation duct 30 through the inner tube portion 41 and conduct the moisture to the outer tube portion 42.

[0055] When in use, the inner tube part 41 of the second moisture decompression component 40 absorbs moisture in the ventilation duct 30 and then diffuses and conducts the moisture to the outer tube part 42. Since the outer tube part 42 is located in the external environment of the ventilation duct 30 and the external environment has low humidity and is relatively dry, the moisture in the outer tube part 42 will continue to evaporate into the external environment.

[0056] In the present invention, by installing the second moisture outlet component 40 on the ventilation pipeline 30 , condensed water formed in the gas chamber 101 of the patient interface device can flow into the ventilation pipeline 30 and then be discharged by the second moisture outlet component 40 .

[0057] It should be noted that the second moisture decompression component 40 is a component similar to the first moisture decompression component 20, but since the second moisture decompression component 40 does not contact the patient's head, the second moisture decompression component 40 may only include a water-absorbing layer, which may be a single-layer or multi-layer structure made of fabric or water-absorbing dressing.

[0058] In some embodiments, in order to reduce the discomfort of the patient such as dry airway during use, the ventilation therapy device may further include a humidification device for heating and humidifying the gas, and the humidified gas may be delivered to the patient interface device through the ventilation line 30. In this case, the second moisture outlet 40 may also prevent the humidified gas from forming excessive condensed water in the ventilation line 30 and entering the patient's respiratory tract to cause potential risks.

[0059] According to an embodiment of the ventilation circuit 30 of the present invention, Figure 6 As shown, the ventilation pipeline 30 may include a first pipeline 31, and the second moisture decompression component 40 may be installed on the first pipeline 31, the inner portion 41 of the second moisture decompression component 40 is located in the first pipeline 31, and the outer portion 42 of the second moisture decompression component 40 is located outside the first pipeline 31.

[0060] Among them, for the installation of the second moisture outlet 40, as shown in Figure 7As shown, an opening can be provided on the tube wall of the first tube 31, the inner tube portion 41 is connected to the inner wall of the first tube 31, and the outer tube portion 42 is sealed and extends out of the first tube 31 through the opening. The inner tube portion 41 of the second moisture derivation member 40 can be fixed to the inner wall of the first tube 31 by bonding or hot-melt welding, and the outer tube portion 42 can be connected to the outer wall of the first tube 31, or not connected to the outer wall of the first tube 31. In order to improve the sealing performance of the first tube 31, the second moisture derivation member 40 is preferably formed as a whole with the first tube 31 by injection molding during manufacturing.

[0061] In the present invention, the second moisture outlet member 40 may have any shape. Figure 6 and Figure 7 In the illustrated embodiment, the second moisture decoupling member 40 may be in the shape of an elongated strip extending along the axial direction of the first pipeline 31 , and the outer portion 42 of the pipe is connected to the outer wall of the first pipeline 31 .

[0062] Furthermore, in order to improve the effect of extracting the moisture in the first pipeline 31 , the ventilation pipeline 30 may include a plurality of second moisture extracting members 40 , and the plurality of second moisture extracting members 40 may be arranged along the circumferential direction of the first pipeline 31 .

[0063] The above describes the case where the ventilation pipeline 30 includes one pipeline (i.e., the first pipeline 31). In other embodiments of the present invention, the ventilation pipeline 30 may be formed by connecting multiple pipelines. In this case, the second moisture derivation component 40 may be installed on each pipeline respectively, or the second moisture derivation component 40 may be installed on two adjacent pipelines.

[0064] Specifically, for example Figure 8 In the embodiment shown, the ventilation pipeline 30 may also include a second pipeline 32, which is connected to one end of the first pipeline 31, and the inner portion 41 of the second moisture derivation component 40 is connected to the inner wall of the first pipeline 31, and the outer portion 42 is connected to the outer wall of the second pipeline 32.

[0065] Furthermore, if Figure 8 and Fig. 9 As shown, the second pipeline 32 can be plugged into the first pipeline 31, and the outer portion 42 of the second moisture outlet 40 can extend to the outside of the second pipeline 32 through the plug-in gap between the first pipeline 31 and the second pipeline 32. In this case, the second moisture outlet 40 can be cylindrical, so that the outer peripheral surface of the inner portion 41 can be connected to the inner wall of the first pipeline 31, and the outer portion 42 can be directly sleeved on the outer wall of the second pipeline 32.

[0066] In the above, the second pipeline 32 can be a heating pipeline. In this case, since the outer tube portion 42 of the second moisture derivation member 40 contacts the outer wall of the second pipeline 32, the evaporation of the moisture in the outer tube portion 42 can be accelerated, thereby improving the moisture derivation effect. When in use, the end of the first pipeline 31 away from the second pipeline 32 can be connected to the patient interface device, and the end of the second pipeline 32 away from the first pipeline 31 can be connected to the host.

[0067] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0069] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A patient interface device for a ventilation therapy device, characterized in that: The patient interface device comprises a main body (10) and a first moisture derivation member (20); the main body (10) defines a gas chamber (101) inside, the gas chamber (101) is used to communicate with the patient's mouth and / or nose; the first moisture derivation member (20) is mounted on the main body (10) and comprises a first portion (21) communicating with the gas chamber (101) and a second portion (22) located outside the main body (10); the first moisture derivation member (20) is configured to absorb moisture in the gas chamber (101) through the first portion (21) and conduct the moisture to the second portion (22); The patient interface device comprises a headband, which is used to fix the main body (10) to the patient's head, and the first moisture deflector (20) forms a part of the headband or forms the entire headband.

2. The patient interface device according to claim 1, wherein: The first moisture dewatering member (20) comprises a fixedly stacked water-absorbing layer (201) and a waterproof layer (202), wherein the waterproof layer (202) is arranged close to a side of the headband for contacting the patient's head.

3. The patient interface device according to claim 2, wherein: The water-absorbing layer (201) is made of fabric or water-absorbing dressing, and / or The waterproof layer (202) is made of plastic or rubber.

4. The patient interface device according to any one of claims 1 to 3, characterized in that: The patient interface device is a nasal oxygen catheter, wherein the main body (10) comprises a nasal connection piece (11) and an adapter (12) mounted on the nasal connection piece (11), the first moisture derivation piece (20) being mounted on the nasal connection piece (11), the gas chamber (101) being defined and formed by the first part (21), the nasal connection piece (11) and the adapter (12), and the adapter (12) being capable of passing gas from a gas source into the gas chamber (101).

5. The patient interface device of claim 4, wherein: The nasal connection piece (11) comprises a mounting structure for mounting the adapter (12), the mounting structure comprising a receiving cavity having a bottom opening and a top wall (111) and a rear wall (112) for defining the receiving cavity, the first part (21) being mounted on the inner surface of the rear wall (112), the adapter (12) comprising a shell (121) having a top opening (122) and a rear opening (123), the shell (121) being sealed and mounted in the receiving cavity via the bottom opening of the mounting structure, and the gas chamber (101) being defined and formed by the shell (121), the top wall (111) and the first part (21).

6. The patient interface device of claim 5, wherein: The nasal cavity connection piece (11) comprises a nasal plug (113) for inserting into the nasal cavity, wherein the nasal plug (113) is arranged to extend upward from the top wall (111) and communicate with the gas chamber (101); and / or The nasal connection piece (11) comprises two connection walls (114) extending outward from the left and right ends of the rear wall (112), respectively, and the connection walls (114) are provided with through holes along the extension direction thereof. The second part (22) of the first moisture derivation piece (20) is arranged to extend from one end of the first part (21) through the two connection walls (114) and then be connected to the other end of the first part (21).

7. A ventilation therapy device, characterized in that: The ventilation therapy device comprises a host as a gas source, a ventilation circuit (30), and a patient interface device according to any one of claims 1 to 6, wherein the host is connected to the patient interface device via the ventilation circuit (30).

8. The ventilation therapy device according to claim 7, characterized in that The ventilation therapy device comprises a second moisture decompression component (40), which is installed on the ventilation pipeline (30) and comprises an in-tube portion (41) located in the ventilation pipeline (30) and an out-tube portion (42) located outside the ventilation pipeline (30), and the second moisture decompression component (40) is configured to absorb moisture in the ventilation pipeline (30) through the in-tube portion (41) and conduct the moisture to the out-tube portion (42).

9. The ventilation therapy device according to claim 8, characterized in that The ventilation pipeline (30) comprises a first pipeline (31) and a second pipeline (32) connected to one end of the first pipeline (31); the end of the first pipeline (31) facing away from the second pipeline (32) is connected to the patient interface device; the end of the second pipeline (32) facing away from the first pipeline (31) is connected to the host; the inner tube portion (41) is connected to the inner wall of the first pipeline (31); the outer tube portion (42) is connected to the outer wall of the second pipeline (32); and the second pipeline (32) is a heating pipeline.

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