Ventilation apparatus and pressure relief device

Abstract

The application discloses a ventilation device and a pressure relief device. The ventilation device comprises a main shell, a pressurizing device, a gas conveying device and the pressure relief device. The pressurizing device and the pressure relief device are arranged in the main shell, and the gas conveying device is arranged in communication with the pressurizing device through the pressure relief device. The pressure relief device comprises a pressure relief part and a gas guide part. The pressure relief part is provided with a pressure relief port for discharging gas. The gas guide part is provided with a gas guide channel, a first port and a second port. The first port is in communication with the second port through the gas guide channel, and the first port is in sealed communication with the pressure relief port. The second port is in communication with an external space of the main shell. The pressure relief port of the pressure relief part is arranged in communication with the external space of the main shell through the gas guide part. The gas (especially oxygen-containing gas) discharged by the pressure relief part can be guided out of the ventilation device through the gas guide part, so that an oxygen-rich environment is avoided in the device, and the safety hazards such as electric spark and fire of the ventilation device are eliminated, thereby providing a guarantee for the safety of the ventilation device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, in particular to a ventilation equipment and a pressure relief device. BACKGROUND

[0002] Inside the ventilation equipment such as ventilator, anesthesia machine, high flow respiratory therapy instrument and the like, in addition to electronic components, control panel, power supply and other electronic and electrical components, a pressure relief valve is usually arranged; when the air pressure of the equipment airway is too high due to equipment failure or other factors, the pressure relief valve can play a role in safe pressure relief. Since the air source of the ventilation equipment contains oxygen, while the pressure relief valve discharges the oxygen-containing gas, an oxygen-rich environment is also formed inside the equipment, which can easily cause electric sparks and even equipment fire, resulting in great safety hazards of the ventilation equipment. SUMMARY

[0003] The technical problem solved by the present application is to provide a ventilation equipment and a pressure relief device, which can guide the discharged oxygen-containing gas out of the equipment to ensure the safety of the equipment.

[0004] According to a first aspect, in one embodiment, a ventilation equipment is provided, comprising a main housing, a pressurizing device, a gas delivery device and a pressure relief device, the pressurizing device and the pressure relief device being arranged in the main housing, the gas delivery device being arranged in communication with the pressurizing device through the pressure relief device; wherein the pressure relief device comprises a pressure relief member and a gas guide member, the pressure relief member having a pressure relief port for discharging gas, the gas guide member having a gas guide channel, a first port and a second port, the first port being in communication with the second port through the gas guide channel, and the first port being in sealed communication with the pressure relief port, and the second port being in communication with an external space of the main housing.

[0005] In one embodiment, the gas guide member comprises:

[0006] a sealing cover having a cover space and an assembly port, the assembly port being arranged in communication with the cover space, one end of the pressure relief port being inserted into the cover space through the assembly port, so that the pressure relief port is located in the cover space; and

[0007] a gas guide tube having two opposite ends, the gas guide channel being formed in the gas guide tube, one end of the gas guide tube being connected with the sealing cover and being configured as the first port in communication with the cover space, and the other end of the gas guide tube being configured as the second port.

[0008] In one embodiment, the sealing cover comprises:

[0009] a cover cap portion being arranged in spaced relation with the pressure relief port; and

[0010] A surrounding wall part is arranged along the circumference of the cover part to form the cover space and the assembly port; at least a part of the surrounding wall part is sealed against the surface of the pressure relief member to seal the pressure relief port in the cover space.

[0011] In one embodiment, the sealing cover further comprises a plurality of supporting parts arranged in the cover space around the pressure relief member, the supporting parts being fixed with the cover part and / or the surrounding wall part to abut against the pressure relief member to maintain the first preset gap between the cover part and the pressure relief port.

[0012] In one embodiment, the cover part has a central region and a peripheral region, the peripheral region being distributed around the central region, the central region being connected to the surrounding wall part through the peripheral region; and the central region is arranged on the side of the peripheral region away from the pressure relief member and spaced from the pressure relief port.

[0013] In one embodiment, the sealing cover is provided with a lip part in the assembly port, the lip part being sealed against the end face edge of the end of the pressure relief member away from the pressure relief port to seal the pressure relief port in the cover space.

[0014] In one embodiment, the main machine housing is provided with a mounting member, the pressure relief member is fixed to the mounting member, and a sealing gap is formed between the end face of the end of the pressure relief member away from the pressure relief port and the mounting member, and the lip part is tightly fixed in the sealing gap.

[0015] In one embodiment, the sealing cover and the pressure relief member are both provided with fixing structures, the fixing structures of the sealing cover and the pressure relief member are arranged in position and matched, and the fixing structures are used to connect a locking member to enable the locking member to integrally fix the sealing cover and the pressure relief member to the main machine housing.

[0016] In one embodiment, the sealing cover and the air guide pipe are made of soft material into an integral structure.

[0017] In one embodiment, the main machine housing is provided with an exhaust port, and the second port is connected to the exhaust port in interference.

[0018] In one embodiment, the main machine housing has a support shell wall for facing the load, the support shell wall is provided with an exhaust port, the second port of the air guide member is in sealed communication with the exhaust port; the side of the support shell wall facing the load is provided with a support structure, the support structure is used to abut against the load to maintain the second preset gap between the exhaust port and the load.

[0019] According to a second aspect, in one embodiment there is provided a pressure relief device for being arranged in communication with a gas delivery channel of a ventilation apparatus to enable pressure relief of the gas delivery channel of the ventilation apparatus and to direct the released gas out of the ventilation apparatus; the pressure relief device comprising a pressure relief member having a pressure relief port for releasing gas, and a gas guiding member having a gas guiding channel, a first port and a second port, the first port being in communication with the second port through the gas guiding channel, and the first port being in sealing communication with the pressure relief port, and the second port being arranged for being in communication with an external space of the ventilation apparatus.

[0020] In one embodiment, the gas guiding member comprises:

[0021] a sealing cover having a cover space and an assembly port arranged in communication with the cover space, the pressure relief member having one end of the pressure relief port inserted into the cover space through the assembly port, such that the pressure relief port is located within the cover space; and

[0022] a gas guiding tube having opposite two ends, the gas guiding channel being formed within the gas guiding tube, one end of the gas guiding tube being connected with the sealing cover and being configured as the first port in communication with the cover space, and the other end of the gas guiding tube being configured as the second port.

[0023] In one embodiment, the sealing cover comprises:

[0024] a cover cap portion arranged opposite to the pressure relief port; and

[0025] a surrounding wall portion surrounding the cover cap portion to form the cover space and the assembly port, at least a portion of the surrounding wall portion being sealingly abutted against a surface of the pressure relief member to seal the pressure relief port within the cover space.

[0026] In one embodiment, the sealing cover further comprises a plurality of support portions arranged within the cover space around the pressure relief member, the support portions being fixed with the cover cap portion and / or the surrounding wall portion to hold the pressure relief member, such that a first predetermined gap is maintained between the cover cap portion and the pressure relief port.

[0027] In one embodiment, a lip portion is provided within the assembly port of the sealing cover, the lip portion being sealingly abutted against an end surface edge of the pressure relief member away from the pressure relief port to seal the pressure relief port within the cover space.

[0028] The ventilation device according to the above embodiment comprises a main housing, a pressurizing device, a gas delivery device and a pressure relief device, the pressurizing device and the pressure relief device are arranged in the main housing, and the gas delivery device is arranged in communication with the pressurizing device through the pressure relief device; the pressure relief device comprises a pressure relief member and a gas guide member, the pressure relief member has a pressure relief port for discharging gas, the gas guide member has a gas guide channel, a first port and a second port, the first port is in communication with the second port through the gas guide channel, the first port is in sealed communication with the pressure relief port, and the second port is in communication with an external space of the main housing. By arranging the pressure relief port of the pressure relief member in communication with the external space of the main housing through the gas guide member, the gas (especially the oxygen-containing gas) discharged by the pressure relief member can be guided out of the ventilation device by the gas guide member, thereby avoiding the formation of an oxygen-rich environment in the device, eliminating the safety hazards such as electric sparks and fires in the ventilation device, and providing protection for the safety of the ventilation device. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The structure assembly diagram of the partial part of the ventilation device of an embodiment.

[0030] Figure 2 The structure exploded view of the partial part of the ventilation device of an embodiment.

[0031] Figure 3 The structure arrangement diagram of the support structure in the ventilation device of an embodiment.

[0032] Figure 4 The structure exploded view of the pressure relief device in the ventilation device of an embodiment.

[0033] Figure 5 The structure cross-sectional view of the pressure relief device in the ventilation device of an embodiment.

[0034] Figure 6 The structure diagram of the gas guide member in the ventilation device of an embodiment.

[0035] In the drawings:

[0036] 10, pressure relief member; 10a, pressure relief port; 10b, second hole site; 20, gas guide member; 20a, second port; 21, sealing cover; 21a, cover part; A, central region; B, edge region; 21b, surrounding wall part; 21c, support part; 21d, lip part; 21e, first hole site; 22, gas guide tube; 30, mounting member; 40, exhaust port; 50, gas inlet connector; 60, proportional valve; 70, support shell wall; 80, support structure; 90, fastening member. DETAILED DESCRIPTION

[0037] The application will be described in further detail below with specific reference to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the application can be practiced without these specific details. In other instances, well-known structures have not been described in detail in order to avoid obscuring the application. In the following description, the terms "couple," "coupled," "connection," and "connected" are used interchangeably with respect to the connection between two elements, and are used to indicate either an indirect connection including an intervening element not necessarily directly connected thereto or a direct connection in which no intervening element is present.

[0038] In addition, features, operations, or characteristics described in the specification can be combined in any suitable manner in various embodiments. Also, various steps or acts in a method described in the specification can be performed in a different order from the order described unless otherwise specified or required by the circumstances. Thus, the order of the various steps or acts described in the specification is merely an example and is not meant to be restrictive, unless otherwise specified or required by the circumstances.

[0039] In this document, the terms "first", "second", etc. are used only to identify different objects described, and do not necessarily have any technical meaning. In this document, the terms "connected" and "coupled" are used only to indicate a connection or coupling between two elements, unless otherwise specified or required by the circumstances.

[0040] At present, in order to avoid the problem of electric spark, fire, etc. caused by the oxygen-rich environment in the ventilation equipment, the common method is to carry out electrical isolation, but the electrical isolation method is difficult to realize in the ventilation equipment with small volume and limited internal space (such as high-flow respiratory therapy instrument, etc.); at the same time, the electrical isolation method is not safe, when the pressure relief valve discharges oxygen-containing gas, an oxygen-rich environment will still be formed in the equipment, which cannot eliminate the safety hazards such as electric spark, fire, etc. easily caused by the ventilation equipment.

[0041] The ventilation equipment provided by the embodiments of the application can safely discharge the airway of the ventilation equipment when the airway pressure of the ventilation equipment reaches or exceeds the preset pressure through the pressure relief device, and discharge the discharged gas (especially oxygen-containing gas) to the outside of the equipment, so that the oxygen-rich environment is not formed in the ventilation equipment, thereby eliminating the safety hazards such as electric spark, fire, or fire, etc. easily caused by the ventilation equipment, and ensuring the safety of the ventilation equipment.

[0042] Please refer to Figures 1 to 6One embodiment provides a ventilation device, such as a breathing machine, an anesthesia machine, or a high flow respiratory therapy instrument, etc., which comprises a main machine housing, a pressurizing device, a pressure relief device, a gas delivery device, and other components as needed.

[0043] The pressure relief device is arranged in the main machine housing and comprises a pressure relief member 10 and a gas guide member 20; wherein the pressure relief member 10 is arranged between the gas delivery device and the pressurizing device, and can adopt a pressure relief valve (i.e., a safety valve) or other functional devices according to actual conditions; the pressure relief member 10 is provided with a pressure relief port 10a for achieving a safe pressure relief effect by discharging gas; the gas guide member 20 is used to communicate the pressure relief port 10a of the pressure relief member 10 with the external space of the ventilation device (specifically, the main machine housing), so as to avoid the gas (especially the oxygen-containing gas) discharged through the pressure relief port 10a from forming an oxygen-rich environment due to accumulation in the device.

[0044] It should be noted that, based on different types of pressure relief member 10, the pressure relief member 10 can also be provided with a gas inlet port for communicating with the gas delivery device and a gas outlet port for communicating with the pressurizing device; or the pressure relief member 10 is arranged on a gas flow channel formed between the gas delivery device and the pressurizing device, and is provided with a gas inlet port for communicating with the gas flow channel. Therefore, from a certain perspective, it can be understood that the gas delivery device is arranged in communication with the pressurizing device through the pressure relief member 10.

[0045] In this embodiment, the main machine housing, the pressurizing device, the gas delivery device, and related functional accessories can be selected and configured based on the functional type, structural layout, and other factors of the ventilation device, with reference to the prior art.

[0046] For example, please refer to Figures 1 to 3 The mounting member 30 and the gas outlet port 40 are arranged in the main machine housing; wherein the mounting member 30 can adopt a seat structure with an internal channel structure, which on the one hand provides structural support for the pressure relief device (specifically, the pressure relief member 10) and the gas delivery device, so that the pressure relief device and the gas delivery device can be assembled and fixed to the main machine housing; on the other hand, the pressure relief member 10 can establish a communication relationship with the gas delivery device and the pressurizing device through the internal channel structure of the mounting member 30. The gas outlet port 40 is arranged through the shell wall of the main machine housing, and the gas guide member 20 can communicate with the external space of the main machine housing through the gas outlet port 40, so that the gas discharged by the pressure relief member 10 is guided out to the outside of the ventilation device through the gas guide member 20 and the gas outlet port 40; of course, the gas outlet port 40 can be omitted, and one end of the gas guide member 20 can be extended to or exposed to the main machine housing, so as to realize communication with the external space of the device.

[0047] For example, please refer to Figures 1 to 3The pressurizing device is arranged in the main machine shell, which can mainly include a turbocharging module and the like; the gas feeding device is arranged on the main machine shell, which can mainly include a gas inlet joint 50 and the like. The gas inlet end of the turbocharging module and the gas inlet joint 50 are respectively in communication with the pressure relief member 10 through the mounting member 30. Of course, a proportional valve 60 or the like for adjusting the input amount of gas can be additionally arranged on the mounting member 30 or between the turbocharging module and the pressure relief member 10.

[0048] When the ventilation equipment is in use, the gas feeding device (for example, the gas inlet joint 50) is in communication with a gas source (for example, an oxygen cylinder, an oxygen supply center, an anesthesia vaporizer and the like), and the gas provided by the gas source is positively input, that is, input to the turbocharging module through the gas inlet joint 50, the mounting member 30, the pressure relief member 10, the proportional valve 60 and the like, and the gas is finally delivered to the patient for use after being pressurized by the turbocharging module.

[0049] When the airway pressure of the ventilation equipment is increased due to equipment failure, patient's own reasons and the like, the mixed gas of air and oxygen in the pressurizing device will be reversely backflowed and backflowed to the pressure relief device. When the pressure in the airway reaches or exceeds the preset pressure value of the pressure relief member 10, the pressure relief port 10a of the pressure relief member 10 is opened to achieve safe pressure relief by discharging the oxygen-containing gas, and the discharged oxygen-containing gas is guided out of the ventilation equipment through the gas guide member 20, so that the oxygen-rich environment in the equipment can be effectively avoided, the safety hazard of the ventilation equipment can be eliminated, and the safety of the ventilation equipment can be ensured. Compared with the electrical isolation method adopted by the existing ventilation equipment, the gas discharged by the pressure relief member 10 is directly guided out of the equipment through the gas guide member 20, which not only does not occupy a large structural space, but also is more secure.

[0050] In one embodiment, please refer to Figures 1 to 6 The gas guide member 20 includes a sealing cover 21 and a gas guide pipe 22; the sealing cover 21 is a single-end open sleeve structure, which has a cover space with a certain volume and an assembly port in communication with the cover space; one end (for example, the top end) of the pressure relief member 10 provided with the pressure relief port 10a is inserted into the cover space through the assembly port, so that the sealing cover 21 is arranged outside the pressure relief member 10.

[0051] The air guide pipe 22 is a tubular structure with a certain length and double-end opening. The air guide pipe 22 has an air guide channel formed therein. One end of the air guide pipe 22 or the air guide channel serves as the first port of the air guide piece 20 for air inlet, and the other end serves as the second port 20a of the air guide piece 20 for air outlet. The first port of the air guide pipe 22 is connected to the sealing cover 10, so that the air guide channel is in sealed communication with the cover space of the sealing cover 21 through the first port. The second port 20a is in sealed communication with the air outlet 40 arranged on the main shell, so that the pressure relief port 10a of the pressure relief piece 10 is in communication with the external space of the main shell through the air guide pipe 22.

[0052] Therefore, the oxygen-containing gas discharged by the pressure relief piece 10 is discharged into the cover space of the sealing cover 21, and then enters the air guide pipe 22 through the first port of the air guide pipe 22, and is finally discharged to the outside of the ventilation device.

[0053] In another embodiment, the air guide piece 20 can also have other structural forms, such as a single-pipe air guide pipe 22 formed by omitting the sealing cover 21, and the first port of the air guide pipe 22 is directly connected to the pressure relief port 10a of the pressure relief piece 10. For example, the air guide piece 20 is arranged with reference to the mounting piece 30, and a channel structure arranged in the air guide piece 20 is used as an air guide channel to guide the oxygen-containing gas discharged by the pressure relief piece 10 to the outside of the device.

[0054] In one embodiment, please refer to Figure 5 and Figure 6 The sealing cover 21 includes a cover cap portion 21a, a surrounding wall portion 21b, and a plurality of support portions 21c. The surrounding wall portion 21b is arranged along the circumference of the cover cap portion 21a to form a cover space and an assembly port of the sealing cover 21. The support portions 21c are arranged along the circumference of the cover cap portion 21a at the position where the cover cap portion 21a and the surrounding wall portion 21b meet or connect, and are fixed to the cover cap portion 21a and / or the surrounding wall portion 21b. Specifically, the support portions 21c are arranged in the cover space and are fixed to the cover cap portion 21a and / or the surrounding wall portion 21b.

[0055] After the pressure relief member 10 is inserted into the sealing cover 21 through the assembly port at one end provided with the pressure relief port 10a, at least part of the surrounding wall portion 21b can be made to abut or adhere to the circumferential surface of the pressure relief member 10 by means of gluing, ultrasonic welding, the material properties of the sealing cover 21 itself (such as elastic material), or other structural forms, so as to seal the pressure relief port 10a in the cover space. At the same time, the support portion 21c is used to hold the part of the pressure relief member 10 adjacent to the pressure relief port 10a, so as to achieve structural support for the cover cap portion 21a; on the one hand, the cover cap portion 21a and the pressure relief port 10a are spaced apart from each other, so as to ensure that a sufficient spacing distance (defined as a first preset gap for the sake of distinction and description) is maintained between the cover cap portion 21a and the pressure relief port 10a, so that the pressure relief member 10 can normally release gas through the pressure relief port 10a; on the other hand, the cover cap portion 21a can be effectively prevented from blocking the pressure relief port 10a due to collapse.

[0056] It should be noted that, in terms of the relative position of the first port of the gas guide pipe 22 and the sealing cover 21, when the sealing cover 21 is arranged outside the pressure relief member 10, the pressure relief member 10 should be prevented from blocking the first port of the gas guide pipe 22, so that the gas released into the cover space can enter the gas guide pipe 22; therefore, the first port of the gas guide pipe 22 can be arranged on the cover cap portion 21a, or on the part of the surrounding wall portion 21b that does not contact the pressure relief member 10.

[0057] In one embodiment, referring to Figure 5 and Figure 6 the cover cap portion 21a adopts a local convex structure, that is, the cover cap portion 21a is divided into a central region A and an edge region B; the central region A refers to the part of the cover cap portion 21a facing the pressure relief port 10a, and the edge region B refers to the part of the cover cap portion 21a distributed around the central region A or opposite the outer edge of the pressure relief port 10a; the central region A is connected to the surrounding wall portion 21b as a whole through the edge region B, and the central region A is provided on the side of the edge region B away from the pressure relief member 10.

[0058] In this way, the central region of the cover cap portion 21a facing the pressure relief member 10 is a concave structure, and the central region of the cover cap portion 21a away from the pressure relief member 10 corresponds to a convex structure, so that after the pressure relief member 10 is inserted into the sealing cover 10, the abutting relationship between the edge region B and / or the support portion 21c and the pressure relief member 10 can ensure that the central region A of the cover cap portion 21a and the pressure relief port 10a maintain the first preset gap, so as to allow the pressure relief port 10a to normally release gas and avoid increasing the gas resistance.

[0059] In some embodiments, the support portion 21c can be omitted, and the cover portion 21a itself has stable structural features to maintain a certain gap between the central region A and the pressure relief port 10a. Of course, in other embodiments, the cover portion 21a can also be configured in a planar manner, and the support portion 21c is provided or the depth of the sleeve between the pressure relief member 10 and the sealing cover 21 is controlled to ensure that the cover portion 21a has sufficient structural gap with the pressure relief port 10a.

[0060] In one embodiment, referring to Figure 5 and Figure 6 , the sealing cover 21 further comprises a lip portion 21d, which is protrudingly arranged in the assembly port of the sealing cover 21 along the circumference of the cover portion 21a. It can also be understood that the lip portion 21d is arranged at the end of the surrounding wall portion 21b away from the cover portion 21a and protrudes from the inner wall of the surrounding wall portion 21b. After the pressure relief member 10 or the end provided with the pressure relief port 10a is inserted into the sealing cover 21, the lip portion 21d can be used to fit the end surface of the end of the pressure relief member 10 away from the pressure relief port 10a. Then, when the sealing cover 21 (or the air guide member 20) and the pressure relief member 10 assembly are installed on the main machine shell (for example, fixedly installed on the mounting member 30), the lip portion 21d can be clamped between the pressure relief member 10 and the mounting member 30, thereby achieving the purpose of sealing the pressure relief port 10a in the cover space.

[0061] It should be noted that, from the perspective of the overall structure of the ventilation device, or from the perspective of the structural relationship between the pressure relief device and the main machine shell and other components, the end surface of the end of the pressure relief member 10 away from the pressure relief port 10a and the mounting member 30 form a structural gap, which can be understood as a sealing gap accommodating the lip portion 21d, and the lip portion 21d is tightly fixed in the sealing gap.

[0062] In addition, in the embodiment where the sealing cover 21 is provided with the lip portion 21d, the surrounding wall portion 21b can be arranged to be separated from or partially in contact with the surface of the pressure relief member 10, and only the lip portion 21d is used to fit the pressure relief port 10a in the cover space. Of course, the lip portion 21d can also be adhered or ultrasonically welded to the pressure relief member 10.

[0063] The sealing cover 21 and the pressure relief member 10 are both provided with fixing structures, and the fixing structures of the two are matched to enable the sealing cover 21 and the pressure relief member 10 to be assembled and fixed as a whole by means of the fixing structures, or both of them to be fixed in the main machine shell.

[0064] In one embodiment, referring to Figure 4A plurality of first hole positions 21e are arranged on the sealing cover 21, and the first hole positions 21e are arranged through the surrounding wall 21b along the length direction of the surrounding wall 21b, and the first hole positions 21e are used as the fixing structure or part of the fixing structure of the sealing cover 21; correspondingly, a plurality of second hole positions 10b are arranged on the pressure relief member 10, and the second hole positions 10b are used as the fixing structure or part of the fixing structure of the pressure relief member 10. When the sealing cover 21 is sleeved on the pressure relief member 10, the first hole positions 21e and the second hole positions 10b are coaxially opposite, and at this time, the locking member 90 such as a screw can be passed through the first hole positions 21e and the second hole positions 10b, and then the sealing cover 21 and the pressure relief member 10 are locked and fixed on the main shell, for example, the mounting member 30.

[0065] In this way, the combined assembly and installation steps of the pressure relief device can be effectively reduced. In specific implementation, the plurality of first hole positions 21e can be arranged at opposite corners of the sealing cover 21 or uniformly spaced around the sealing cover 21; correspondingly, the plurality of second hole positions 10b are one-to-one aligned with the plurality of first hole positions 21e; thereby facilitating the balanced and stable fixing of the sealing cover 21 and the pressure relief member 10 as a whole.

[0066] Of course, in some embodiments, the fixing structure can adopt other structural forms, for example, buckles and the like.

[0067] In one embodiment, the air guide member 20 is an integrally formed structure made of soft material, for example, integrally injection molded by using silica gel or the like; specifically, the sealing cover 21 and the air guide pipe 22 are an integrally formed structure made of soft material, so that the gas discharged by the pressure relief member 10 cannot leak from the air guide member 20 into the main shell. Meanwhile, in the embodiment in which the main shell is provided with the exhaust port 40, the second port 20a of the air guide pipe 22 can be connected with the exhaust port 40 in interference by relying on the elastic properties of the material, so as to quickly complete the combined assembly of the air guide pipe 22 and the main shell.

[0068] In other embodiments, the air guide member 20 can also adopt a split structure, that is, the sealing cover 21 and the air guide pipe 22 are fixed and combined as a whole in a detachable or non-detachable manner.

[0069] In one embodiment, please refer to Figures 1 to 3The host shell has a support shell wall 70 arranged to face the carrier (such as a table top or other object capable of placing or fixing the ventilation device), which can be a bottom portion or a side wall portion of the host shell, depending on the placement or installation form of the ventilation device. The exhaust port 40 is arranged through the support shell wall 70, and a support structure 80 is arranged on the side of the support shell wall 70 facing the carrier. The host shell or the ventilation device as a whole is in contact with the carrier through the support structure 80, so that a structural gap (defined as a second preset gap for the purpose of distinguishing and describing) is maintained between the exhaust port 40 and the carrier, to avoid the exhaust port 40 being blocked by the carrier, and thus the gas discharged by the air guide pipe 22 can be discharged to the outside of the ventilation device through the exhaust port 40 and the second preset gap.

[0070] In implementation, the support structure 80 can be a separate component such as a gasket added to the support shell wall 70, or a structural part formed on the support shell wall 70, such as a protruding structure.

[0071] Please refer to Figures 4 to 6 The application also provides a pressure relief device, which is the pressure relief device of the foregoing embodiments, i.e., the pressure relief device can be applied to the ventilation device as a component independent of the ventilation device. Specifically, the pressure relief device can be assembled in the gas delivery channel of an existing ventilation device, such as between the gas delivery device and the pressure increasing device of the ventilation device. The pressure relief component 10 is used to replace the pressure relief valve or other components of the existing ventilation device. By sealingly connecting the second port 20a of the air guide component 20 to the exhaust port of the ventilation device, or exposing the second port 20a of the air guide component 20 to the ventilation device, the existing ventilation device can be retrofitted, and the formation of an oxygen-rich environment inside the ventilation device can be avoided, ensuring the safety of the ventilation device.

[0072] Of course, the air guide component 20 in the pressure relief device can also be used as a separate component in the ventilation device. For example, the sealing cover 21 is configured according to the profile of the pressure relief valve or other components of the ventilation device. By sealingly arranging the sealing cover 21 outside the pressure relief valve of the ventilation device, and leading one end (i.e., the second port 20a) of the air guide pipe 22 out of the ventilation device or sealingly connecting it to the exhaust port of the ventilation device, the oxygen-containing gas discharged by the ventilation device can be guided to the outside of the device.

[0073] The above application of specific examples is used to illustrate the application, which is only used to help understand the application and does not limit the application. For those skilled in the art to which the application belongs, according to the idea of the application, a number of simple deductions, modifications or substitutions can be made.

Claims

1. A medical ventilation device, characterized in that, The device includes a main housing, a pressurizing device, a gas supply device, and a pressure relief device. The pressurizing device and the pressure relief device are disposed inside the main housing. The gas supply device is connected to the pressurizing device through the pressure relief device. The pressure relief device includes a pressure relief component and a gas guide component. The pressure relief component is connected between the gas supply device and the pressurizing device and has a pressure relief port for releasing gas. The gas guide component is used to guide the gas released by the pressure relief component to the external space of the main housing to avoid the formation of an oxygen-rich environment inside the main housing. The gas guide component has a gas guide channel, a first port, and a second port. The first port is connected to the second port through the gas guide channel and is sealed to the pressure relief port. The second port is connected to the external space of the main housing. The air guiding component includes a sealing cover and an air guiding pipe. The sealing cover has a housing space. The sealing cover is sealed on the outside of the pressure relief component so that the pressure relief port is located within the housing space. The air guiding pipe has two opposing ends, and the air guiding channel is formed inside the air guiding pipe. One end of the air guiding pipe is connected to the sealing cover and is configured as a first port that is sealed and communicates with the housing space. The other end of the air guiding pipe is configured as a second port.

2. The medical ventilation device as described in claim 1, characterized in that, The sealing cover also has an assembly port, which is connected to the cover space; the pressure relief component has one end with the pressure relief port inserted into the cover space through the assembly port, so that the pressure relief port is located within the cover space.

3. The medical ventilation device as described in claim 2, characterized in that, The sealing cover includes: A cover portion, which is spaced apart from and opposite to the pressure relief port; and The enclosure portion surrounds the cover portion circumferentially to form the cover space and the assembly port; at least a portion of the enclosure portion seals against the surface of the pressure relief component to seal the pressure relief port within the cover space.

4. The medical ventilation device as described in claim 3, characterized in that, The sealing cover also includes a plurality of support portions, which are arranged around the pressure relief member within the cover space. The support portions are fixed to the cover portion and / or the enclosure portion to abut against the pressure relief member, so that a first preset gap is maintained between the cover portion and the pressure relief port.

5. The medical ventilation device as described in claim 3, characterized in that, The cover has a central area and an edge area, the edge area is distributed around the central area, and the central area is connected to the enclosure through the edge area; and the central area is provided on the side of the edge area facing away from the pressure relief member, and is spaced apart from the pressure relief port.

6. The medical ventilation device as described in claim 2, characterized in that, The sealing cover has a lip inside the assembly port, which is sealed to the edge of the end face of the pressure relief component facing away from the pressure relief port, so as to seal the pressure relief port within the cover space.

7. The medical ventilation device as described in claim 6, characterized in that, The main unit housing is provided with an installation component. The pressure relief component is fixed to the installation component, and a sealing gap is formed between the end face of the pressure relief component facing away from the pressure relief port and the installation component. The lip part is pressed and fixed in the sealing gap.

8. The medical ventilation device as described in claim 2, characterized in that, Both the sealing cover and the pressure relief component are equipped with a fixing structure. The fixing structure of the sealing cover and the fixing structure of the pressure relief component are aligned and fitted together. The fixing structure is used to connect the locking component so that the locking component can fix the sealing cover and the pressure relief component together to the main unit housing.

9. The medical ventilation device as described in claim 2, characterized in that, The sealing cover and the air duct are integrally molded structures made of soft material.

10. The medical ventilation device as described in claim 9, characterized in that, The main housing is provided with an exhaust port, and the second port is interference-fitted to the exhaust port.

11. The medical ventilation device as described in claim 1, characterized in that, The main housing has a supporting shell wall for facing the load, and the supporting shell wall has a through exhaust port. The second port of the air guide is sealed and connected to the exhaust port. The side of the supporting shell wall facing the load has a supporting structure for abutting against the load so that a second preset gap is maintained between the exhaust port and the load.

12. A pressure relief device for medical ventilation equipment, characterized in that, The pressure relief device is configured to communicate with the gas delivery channel of the medical ventilation equipment to relieve pressure in the gas delivery channel and discharge the released gas to the outside of the medical ventilation equipment. The pressure relief device includes a pressure relief component and a gas guide component. The pressure relief component is configured to communicate with the gas delivery channel and has a pressure relief port for discharging gas. The gas guide component is configured to discharge the gas discharged by the pressure relief component to the external space of the medical ventilation equipment to avoid the formation of an oxygen-rich environment inside the medical ventilation equipment. The gas guide component has a gas guide channel, a first port, and a second port. The first port is connected to the second port through the gas guide channel and is sealed to the pressure relief port. The second port is configured to communicate with the external space of the medical ventilation equipment. The air guiding component includes a sealing cover and an air guiding pipe. The sealing cover has a cover space. The sealing cover is sealed on the outside of the pressure relief component so that the pressure relief port is located within the cover space. The air guiding pipe has two opposite ends, and the air guiding channel is formed inside the air guiding pipe. One end of the air duct is connected to the sealing cover and is configured as the first port that is in sealed communication with the space of the cover. The other end of the air duct is configured as the second port.

13. The pressure relief device as described in claim 12, characterized in that, The sealing cover also has an assembly port, which is connected to the cover space; the pressure relief component has one end with the pressure relief port inserted into the cover space through the assembly port, so that the pressure relief port is located within the cover space.

14. The pressure relief device as described in claim 13, characterized in that, The sealing cover includes: A cover portion, which is spaced apart from and opposite to the pressure relief port; and The enclosure portion surrounds the cover portion circumferentially to form the cover space and the assembly port; at least a portion of the enclosure portion seals against the surface of the pressure relief component to seal the pressure relief port within the cover space.

15. The pressure relief device as described in claim 14, characterized in that, The sealing cover also includes a plurality of support portions, which are arranged around the pressure relief member within the cover space. The support portions are fixed to the cover portion and / or the enclosure portion to abut against the pressure relief member, so that a first preset gap is maintained between the cover portion and the pressure relief port.

16. The pressure relief device as described in claim 13, characterized in that, The sealing cover has a lip inside the assembly port, which is sealed to the edge of the end face of the pressure relief component facing away from the pressure relief port, so as to seal the pressure relief port within the cover space.

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