CN212987545U - Air inlet mechanism and negative pressure system - Google Patents

Abstract

The embodiment of the utility model discloses mechanism and negative pressure system admit air. This air inlet mechanism, including first inlet end, the first passageway of giving vent to anger end and intercommunication first inlet end and the first end of giving vent to anger, first gas drive unit and along the first passageway in the first passageway the gas flow direction set gradually first effect filter screen, well effect filter screen and high-efficient filter screen. Above-mentioned air inlet mechanism, the first air drive unit of having accomodate in first passageway and along the first passageway in the gaseous flow direction set gradually just imitate filter screen, well imitate filter screen and high-efficient filter screen, guaranteed the cleanliness factor of the gaseous behind the air inlet mechanism, avoid through the mechanism of admitting air to its gas supply in the cavity further worsen of gas quality.

Description

Air inlet mechanism and negative pressure system

Technical Field

The utility model relates to a protection technology field especially relates to an air intake mechanism and negative pressure system.

Background

The harmful substances are usually transmitted through the air, and in order to prevent the diffusion of the harmful substances, the harmful substances are generally isolated from the outside in an isolating manner. The conventional negative pressure system prevents the harmful material from leaking out by forming a negative pressure. Because the mechanism of admitting air for negative pressure system air feed lacks the filtering capability, can't guarantee the cleanness of admitting air, consequently, has the risk of further worsening the inside gas quality of negative pressure system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air intake mechanism and negative pressure system when preventing harmful substance along with air diffusion to solve traditional negative pressure system and can't carry out filterable technical problem to admitting air.

In order to achieve the above object, the present invention adopts the following technical means:

the utility model provides an air inlet mechanism, includes first inlet end, the first end and the intercommunication of giving vent to anger first inlet end with the first passageway of the end of giving vent to anger, first gas drive unit and edge are accepted in the first passageway just imitate filter screen, well effect filter screen and high-efficient filter screen that the gas flow direction set gradually in the first passageway.

In some embodiments of the air intake mechanism, the first channel further accommodates an ultraviolet lamp, and the ultraviolet lamp is used for sterilizing and disinfecting the gas in the first channel.

In order to achieve the above object, the present invention adopts the following technical means:

a negative pressure system, comprising:

the sealing structure can be unfolded to form a cavity and comprises an opening and closing mechanism, and the opening and closing mechanism is used for communicating or isolating the cavity with the external space of the sealing structure;

a support device capable of deploying the enclosure;

the detection device is used for detecting the air pressure inside the closed structure; and

the gas exchange device is used for purifying and exchanging the gas inside and outside the closed structure;

the gas exchange device comprises an exhaust mechanism, a purification mechanism and the gas inlet mechanism, wherein the purification mechanism is used for purifying the gas passing through the gas inlet mechanism and the gas passing through the exhaust mechanism, the purification mechanism comprises a first purification component and a second purification component, the first purification component is used for purifying the gas passing through the gas inlet mechanism, and the second purification component is used for purifying the gas passing through the exhaust mechanism;

the air inlet mechanism is used for introducing air into the closed structure, and the exhaust mechanism is used for exhausting the air in the closed structure so as to adjust the air pressure in the closed structure to be lower than the air pressure outside the closed structure.

In some embodiments of the negative pressure system, the opening and closing mechanism is a door structure for people to enter and exit.

In some embodiments of the negative pressure system, the support device comprises a plurality of support mechanisms;

the adjacent supporting mechanisms can be connected into a whole when being close to each other, and the adjacent supporting mechanisms can unfold the closed structure when being far away from each other.

In some embodiments of the negative pressure system, the support mechanism includes bodies, at least one of the bodies having the air intake mechanism disposed thereon, and at least one of the bodies having the air exhaust mechanism disposed thereon.

In some embodiments of the negative pressure system, at least one of the bodies is provided with an operation console, and the operation console controls the flow rate of the gas passing through the gas inlet mechanism and the flow rate of the gas passing through the gas outlet mechanism according to the gas pressure value detected by the detection device.

In some embodiments of the negative pressure system, a top of the supporting mechanism is provided with a telescopic rod, and the telescopic rod can be accommodated in the supporting mechanism.

In some embodiments of the negative pressure system, the negative pressure system further comprises a telescopic connecting frame for driving the adjacent support mechanism to approach and move away.

In some embodiments of the negative pressure system, the bottom of the support mechanism has a roller.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

above-mentioned air inlet mechanism, the first air drive unit of having accomodate in first passageway and along the first passageway in the gaseous flow direction set gradually just imitate filter screen, well imitate filter screen and high-efficient filter screen, guaranteed the cleanliness factor of the gaseous behind the air inlet mechanism, avoid through the mechanism of admitting air to its gas supply in the cavity further worsen of gas quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

FIG. 1 is a front view of a negative pressure system in one embodiment as it is deployed.

Fig. 2 is an axial view of the negative pressure system shown in fig. 1.

Fig. 3 is a top view of the negative pressure system shown in fig. 1.

Fig. 4 is an axial view of a closed structure in the negative pressure system shown in fig. 1.

Figure 5 is an axial view of the support assembly in one embodiment when retracted.

Fig. 6 is an enlarged view of the part a in fig. 5.

Fig. 7 is an enlarged view of the part B in fig. 5.

Fig. 8 is a schematic view showing the support device in the negative pressure system shown in fig. 1 being unfolded in the X direction.

Fig. 9 is a schematic view showing the support device in the negative pressure system shown in fig. 1 expanded in the Y direction.

FIG. 10 is a schematic view of the extension rod of the suction system shown in FIG. 1.

Fig. 11 is a schematic structural diagram of a first support mechanism in the negative pressure system shown in fig. 1.

Fig. 12 is a schematic structural diagram of a third supporting mechanism in the negative pressure system shown in fig. 1.

Fig. 13 is a schematic structural diagram of the first gas driving unit/the second gas driving unit in the negative pressure system shown in fig. 1.

Fig. 14 is a schematic view of the connection strip in the negative pressure system shown in fig. 1.

FIG. 15 is an axial view from a perspective of the internal structure of the body of the first support mechanism in one embodiment.

Fig. 16 is an axial view from another perspective of the internal structure of the body of the first support mechanism of fig. 15.

Fig. 17 is a front view of the internal structure of the body of the first support mechanism shown in fig. 15.

Fig. 18 is a cross-sectional view taken along line C-C of fig. 17.

Fig. 19 is a plan view of the internal structure of the body of the first support mechanism shown in fig. 15.

Fig. 20 is a horizontal sectional view of the first support mechanism in another embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides a negative pressure system 10 is used for preventing that harmful substance from propagating through the air, and harmful substance is including harmful gas, harmful liquid and the harmful solid particle that can be along with the airborne and mycoplasma and pathogen that can be along with the airborne, and harmful substance is still including the aerosol that contains mycoplasma and/or pathogen. Of course, in other embodiments of the present invention, the negative pressure system 10 can also be used to prevent harmful substances from being transmitted through other media, or other non-harmful substances from being transmitted, or applied to other situations requiring negative pressure, and is not limited herein.

Referring to fig. 1 to 14, a negative pressure system 10 according to the present invention will be described. A negative pressure system 10, comprising: an enclosure 100, a support 200, a detection device and a gas exchange device. The enclosure 100 is a flexible structure or a folding structure that can be composed of a plurality of splice plates, and the folding structure can be folded to reduce the volume for carrying, and has a certain space after being unfolded. Further, the enclosure structure 100 can be unfolded to form a cavity, and the enclosure structure 100 includes an opening and closing mechanism 110, and the opening and closing mechanism 110 is used for communicating or isolating the cavity with the external space of the enclosure structure 100. The negative pressure system 10 adopts the closed structure 100, the closed structure 100 can be unfolded to form a cavity, the cavity is communicated or isolated with an external space through the opening and closing mechanism 110, and when the opening and closing mechanism 110 is closed, the cavity can be completely isolated from the external space, so that the diffusion of harmful substances is effectively prevented.

Referring to fig. 1 to 4, the sealing structure 100 is a flexible structure, and the unfolded shape of the sealing structure 100 may be a rectangular parallelepiped, a cylinder, a semi-spherical body, or other shapes capable of forming a certain space. In this embodiment, the shape of the enclosing structure 100 is a rectangular parallelepiped. Specifically, the enclosure structure 100 includes a bottom section 120, a top section 130, and side sections 140, 120, 130 and 140 between the bottom section 120 and the top section 130 that are unfolded to form a cavity. In this embodiment, the opening and closing mechanism 110 includes two opening and closing portions 111, the two opening and closing portions 111 are closed in a magnetic attraction manner or a mechanical connection manner, and a sealing structure is further disposed between the two opening and closing portions 111 to ensure that the cavity is isolated from an external space when the opening and closing mechanism is closed. The side subsection 140 also has a viewing window 141 made of transparent medium.

In this embodiment, the opening and closing mechanism 110 is a door structure for people to get in and out, and the opening and closing portion 111 is a flexible structure, for example, the opening and closing portion 111 is a flexible curtain, and two opening and closing portions 111 are folded in a manner of deviating from each other to form a passage for getting in and out of the cavity. It can be understood that in other embodiments, the top of the opening/closing portion 111 and the side away from the other opening/closing portion 111 are integrally connected to the enclosing structure 100, the bottom of the opening/closing portion 111 is detachably connected to the enclosing structure 100, and the connection can be achieved by a magnetic attraction manner or a mechanical connection manner, and a sealing structure is disposed between the bottom of the opening/closing portion 111 and the enclosing structure 100 to ensure that the cavity is isolated from the external space when closed. That is, an L-shaped connecting seam is formed between adjacent opening/closing portions 111 and the bottom of the opening/closing portion 111, and the opening/closing portion 111 is lifted along the L-shaped connecting seam to enter and exit the cavity. When the opening and closing mechanism 110 is closed, the closed structure 100 is a full-sealed structure, and gas can only be exchanged through the gas exchange device, so that absolute isolation of harmful substances from the outside is ensured.

Further, the support device 200 is capable of deploying the enclosure 100. Specifically, the support device 200 includes a plurality of support mechanisms. Adjacent supporting mechanism can connect as an organic whole when being close to, and accessible magnetism is inhaled the mode or mechanical mode and is connected. The closure structure 100 can be deployed when adjacent support mechanisms are far apart. Furthermore, a telescopic rod is arranged at the top of the supporting mechanism and can be contained in the supporting mechanism. When the adjacent supporting mechanisms are far away from each other, the height of the supporting mechanisms cannot meet the requirement that when the closed structure 100 is expanded in the axial direction of the supporting mechanisms, the telescopic rods extend out of the supporting mechanisms and are locked to improve the height of the supporting mechanisms, the closed structure 100 is expanded into a final shape, and the closed structure 100 is connected with the supporting mechanisms and the telescopic rods through connecting pieces. The bottom of the support mechanism has rollers 210 to facilitate the approach and departure of adjacent support mechanisms. The roller 210 is provided with a locking portion that locks the roller 210 after the support mechanism has moved to a predetermined position, to prevent the support mechanism from moving. The presence of the roller 210 also facilitates the overall movement of the support device 200, and the enclosing structure 100 is a flexible structure, so that the overall portability of the negative pressure system 10 is enhanced when it is retracted.

In this embodiment, the supporting device 200 includes a first supporting mechanism 220, a second supporting mechanism 230, a third supporting mechanism 240 and a fourth supporting mechanism 250, the first supporting mechanism 220 and the second supporting mechanism 230 and the third supporting mechanism 240 and the fourth supporting mechanism 250 are connected by a magnetic element, an elastic element is wrapped around the magnetic element to reduce impact caused by collision during connection, and the first supporting mechanism 220 and the fourth supporting mechanism 250 and the second supporting mechanism 230 and the third supporting mechanism 240 are connected by a lock catch 260. The lock catch 260 includes a connection block 261 and a connection groove, the connection block 261 is rotatable with respect to the first/second supporting mechanisms 220/230, a connection protrusion 2611 is formed thereon to match the connection groove formed on the third/fourth supporting mechanisms 240/250, and the connection block 261 and the connection groove may be magnetically or mechanically connected. Further, the piece is inhaled to magnetism is electromagnetic, is provided with touch switch 270 on the strutting arrangement 200, can realize the outage and the circular telegram of the piece of magnetism through touch switch 270 to the magnetic attraction that the piece was inhaled to messenger disappears and forms. The elastic component is extruded and forms the elastic force after magnetic attraction forms, and when magnetic attraction disappears, under the effect of elastic force, first supporting mechanism 220 and second supporting mechanism 230 that link as an organic whole through hasp 260 and third supporting mechanism 240 and fourth supporting mechanism 250 that link as an organic whole through hasp 260 can bounce each other, conveniently expand as holistic first supporting mechanism 220 and second supporting mechanism 230 and third supporting mechanism 240 and fourth supporting mechanism 250 as a whole with the help of inertia. The piece is inhaled to magnetism produces touching touch switch 270 once after the magnetic attraction, and the magnetic attraction disappears, touches touch switch 270 once again, and the magnetic attraction produces again.

Further, the negative pressure system 10 further includes a telescopic connecting frame 300, and the connecting frame 300 is used for driving the adjacent supporting mechanism to approach and move away. The connecting frame 300 comprises a first connecting frame 310 connected between the second supporting mechanism 230 and the third supporting mechanism 240, a second connecting frame 320 connected between the third supporting mechanism 240 and the fourth supporting mechanism 250, and a third connecting frame 330 connected between the fourth supporting mechanism 250 and the first supporting mechanism 220, and through the arrangement of the three groups of connecting frames 300, the supporting mechanisms which are close to each other can be far away from each other, and the far direction and distance can be limited, so that the closed structure 100 can be unfolded. As described above, when the magnetic attraction force disappears, the first and second supporting mechanisms 220 and 230 integrated by the latch 260 and the third and fourth supporting mechanisms 240 and 250 integrated by the latch 260 can be elastically released from each other by the elastic force, and the second linking frame 320 is extended in the X direction in fig. 8 to unfold the first and second supporting mechanisms 220 and 230 and the third and fourth supporting mechanisms 240 and 250 as a whole. Thereafter, the latch 260 is opened, the first link 310 is extended in the Y direction of fig. 9 to unfold the second and third support mechanisms 230 and 240, the third link 330 is extended in the Y direction of fig. 9 to unfold the first and fourth support mechanisms 220 and 250, and finally, each support mechanism is locked by the roller 210. In this embodiment, the connecting frame 300 is formed by hinging a plurality of connecting rods 301 end to end, and the two connecting rods 301 at the ends are respectively connected to the corresponding supporting mechanisms.

Further, the detection device is used for detecting the air pressure inside the enclosure 100. Specifically, the detection device is used for detecting the air pressure of the cavity.

Further, the gas exchange device is used for exchanging the purified gas inside and outside the enclosure 100 so as to adjust the pressure inside the enclosure 100 to be lower than the pressure outside the enclosure 100. Furthermore, the gas exchange device is a fresh air device with a purification function, the gas exchange device comprises an air inlet mechanism, an exhaust mechanism and a purification mechanism, and the purification mechanism is used for purifying the gas passing through the air inlet mechanism and the gas passing through the exhaust mechanism. The air inlet mechanism is used for introducing air into the closed structure 100, and the air outlet mechanism is used for discharging air in the closed structure 100 so as to adjust the air pressure in the closed structure 100 to be lower than the air pressure outside the closed structure 100.

Specifically, the exhaust mechanism is communicated with the cavity and used for adjusting the air pressure of the cavity to be lower than the air pressure outside the cavity. The air inlet mechanism comprises a first air inlet end 225, a first air outlet end 226 and a first channel communicated with the first air inlet end 225 and the first air outlet end 226, a first air driving unit 500 is arranged on the first channel, the first air inlet end 225 is communicated with an input end 501 of the first air driving unit 500, the first air outlet end 226 is communicated with an output end 502 of the first air driving unit 500, air in the external space of the closed structure 100 is driven by the first air driving unit 500, and the air can enter the cavity through the first channel. The exhaust mechanism comprises a second air inlet end 243, a second air outlet end and a second channel communicated with the second air inlet end 243 and the second air outlet end, a second air driving unit 600 is arranged on the second channel, the second air inlet end 243 is communicated with an input end 601 of the second air driving unit 600, the second air outlet end is communicated with an output end 602 of the second air driving unit 600, air in the cavity is driven by the second air driving unit 600, and the air can be exhausted out of the cavity through the second channel. The purification mechanism comprises a first purification assembly and a second purification assembly, the first purification assembly is used for purifying gas passing through the air inlet mechanism, and the second purification assembly is used for purifying gas passing through the exhaust mechanism. Specifically, purify the mechanism including setting up in the first subassembly of purifying of first passageway and setting up in the second subassembly of purifying of second passageway, further, first subassembly of purifying includes first air purification net and is used for fixing the first connecting piece in first passageway with first air purification net, and the second subassembly of purifying includes second air purification net and is used for fixing the second connecting piece in the second passageway with second air purification net. The first air purification net and the second air purification net are HEPA filter screens, wherein the second air purification net also has a sterilization function to ensure that the exhaust gas is free of harmful substances. Further, the cavity is enabled to form negative pressure through the combined action of the air inlet mechanism and the air outlet mechanism.

As shown in fig. 14, further, a connection strip 1111 is provided at a detachable connection position of the opening and closing portion 111 and the connection position between the adjacent opening and closing portions 111, and the connection strip 1111 provided at the connection position between the adjacent opening and closing portions 111 is fixedly connected to one of the opening and closing portions 111. The connecting strip 1111 is located the circumference of the portion 111 that opens and shuts and keeps away from one side of cavity, because the atmospheric pressure in the cavity is less than the atmospheric pressure outside the cavity, connecting strip 1111 adsorbs in each junction, guarantees that the cavity keeps apart with external space, and the processing is done in order to reduce its sliding friction force on the connecting strip 1111 surface, and then reduces the portion 111 that opens and shuts and open the resistance. The connecting strip 1111 can be made of flexible materials and can deform under the action of air pressure, and the isolation of the cavity from the external space is further ensured.

Further, the supporting mechanism comprises bodies, at least one body is provided with an air inlet mechanism, and at least one body is provided with an exhaust mechanism. At least one body is provided with an operation console, and the operation console controls the gas flow passing through the gas inlet mechanism and the gas flow passing through the gas outlet mechanism according to the gas pressure value detected by the detection device.

Specifically, the first supporting mechanism 220 includes a first body 221, an air inlet mechanism is disposed in the first body 221, the first air outlet end 226 is communicated with the cavity, a roller 210 is disposed at the bottom of the first body 221, a first telescopic rod 222 capable of extending out of the top of the first body 221 is accommodated in the first body 221, an operation console is further disposed in the first body 221, the operation console includes a display screen 223, a processing unit, a receiving unit, a sending unit and a report generating unit, and the processing unit is used for controlling the air flow passing through the air inlet mechanism and the air flow passing through the air outlet mechanism according to the air pressure value detected by the first detecting device. The receiving unit is used for receiving external signals, such as control signals, to control the operation of the negative pressure system 10, data signals, including examination information of infected patients, and the like. The transmitting unit is used for transmitting signals such as operation information of the negative pressure system 10, monitoring data of an infected patient and the like to the outside. The report generation unit is used for generating and exporting a paper report from the report outlet 224 of the first body 221, wherein the paper report may include status information of the negative pressure system 10, monitoring data of an infectious patient, or an examination report of the infectious patient, etc. over a period of time. The display screen 223 is disposed on the top end of the first body 221, and is used for displaying the air pressure value detected by the first detection device, the air flow of the air intake mechanism and the air exhaust mechanism, the monitoring data of the infectious patient, or the inspection report of the infectious patient, and the display screen 223 has an interactive function. The gas quality inside the closed structure 100 detected by the second detection device 400 can be displayed in real time through the display screen 223, so that the gas quality inside the closed structure 100 can be known in real time.

In another embodiment, referring to fig. 11, 15 to 19, the air inlet mechanism includes a first air inlet end 225, a first air outlet end 226, and a first channel 227 communicating the first air inlet end 225 and the first air outlet end 226. The first channel 227 accommodates a first gas driving unit 228, and a primary filter 2271, a secondary filter 2272, and a high efficiency filter 2273, which are sequentially disposed along a gas flowing direction in the first channel 227. The first gas driving unit 228 can be disposed at any position, and the first gas driving unit 228 can be disposed before the primary filter 2271, or between the primary filter 2271 and the intermediate filter 2272, or between the intermediate filter 2272 and the high-efficiency filter 2273, or behind the high-efficiency filter 2273. The inner wall of the first channel 227 is provided with an insert for fixing a primary 2271, a medium 2272 and a high 2273. In this embodiment, the first gas driving unit 228 is disposed between the middle-effect filter screen 2272 and the high-effect filter screen 2273, and a first purifying assembly is disposed between the first gas driving unit 228 and the middle-effect filter screen 2272. The first purification assembly includes a first air purification screen 2274 and an ultraviolet lamp. The ultraviolet lamp is used for sterilizing and disinfecting the gas passing through the first air purification net 2274. The first air purification net 2274 is fixedly connected to the inner wall of the first passage 227. As shown in fig. 20, it can be understood that in other embodiments, the first gas driving unit 228 is disposed in front of the primary filter 2271, and the primary filter 2271, the intermediate filter 2272 and the high-efficiency filter 2273 are stacked together to form a filter 2275. Referring to fig. 15 to 19, the first supporting mechanism 220 includes a first body 221, and an air intake mechanism is disposed in the first body 221. The first gas inlet end 225 and the first gas outlet end 226 are located on the first body 221. The air intake mechanism further includes an inner housing 229 located within the first body 221. The first passage 227 forms a first through-hole 2291 and a second through-hole 2292 on the inner case 229. The primary filter screen 2271 is disposed adjacent to the first through hole 2291. The first air intake end 225 communicates with the first through hole 2291. The first outlet end 226 is in communication with the second through-hole 2292. Further, a mesh plate is provided on the first through hole 2291 for preliminary filtering before the gas enters the inner case 229 to remove impurities of a larger size, so as to improve the life of the primary filter screen 2271 and the first purification assembly. Further, the first air outlet end 226 is sleeved on the second through hole 2292. The first air outlet end 226 is communicated with the cavity, the bottom of the first body 221 is provided with a roller 210, the first body 221 is internally provided with a first telescopic rod 222 which can extend out of the top of the first body, the first body 221 is internally provided with an operation console, the operation console comprises a display screen 223, a processing unit, a receiving unit, a sending unit and a report generating unit, and the processing unit is used for controlling the air flow passing through the air inlet mechanism and the air flow passing through the air outlet mechanism according to the air pressure value detected by the first detection device. The receiving unit is used for receiving external signals, such as control signals, to control the operation of the negative pressure system 10, data signals, including examination information of infected patients, and the like. The transmitting unit is used for transmitting signals such as operation information of the negative pressure system 10, monitoring data of an infected patient and the like to the outside. The report generation unit is used for generating and exporting a paper report from the report outlet 224 of the first body 221, wherein the paper report may include status information of the negative pressure system 10, monitoring data of an infectious patient, or an examination report of the infectious patient, etc. over a period of time. The display screen 223 is disposed on the top end of the first body 221, and is used for displaying the air pressure value detected by the first detection device, the air flow of the air intake mechanism and the air exhaust mechanism, the monitoring data of the infectious patient, or the inspection report of the infectious patient, and the display screen 223 has an interactive function. The gas quality inside the closed structure 100 detected by the second detection device 400 can be displayed in real time through the display screen 223, so that the gas quality inside the closed structure 100 can be known in real time.

Further, the second supporting mechanism 230 includes a second body 231, the bottom of the second body 231 is provided with a roller 210, and the second body 231 accommodates a second telescopic rod 232 which can extend from the top thereof. The second body 231 is also formed with a storage groove 233 for storing articles. As shown in fig. 7, the touch switch 270 is disposed on the second body 231, and is a foot touch switch, on which a sliding prevention portion 271 is disposed and can rotate relative to the second body 231. As shown in fig. 1 to 3 and 8 to 10, the opening and closing mechanism 110 is disposed between the first supporting mechanism 220 and the second supporting mechanism 230. In order to drive the opening and closing mechanism 110 to open and close, a cross beam 400 is arranged between the first telescopic rod 222 and the second telescopic rod 232, and a driving mechanism for driving the opening and closing mechanism 110 to open and close is arranged on the cross beam 400.

Further, the third supporting mechanism 240 includes a third body 241, an air exhausting mechanism is disposed in the third body 241, a second air inlet 243 is communicated with the cavity, a roller 210 is disposed at the bottom of the third body 241, and a third telescopic rod 242 capable of extending out from the top of the third body 241 is accommodated in the third body 241. The first air outlet end 226 and the second air inlet end 243 are arranged diagonally, which is beneficial to rapid diffusion of air entering the cavity, for example, for a patient needing oxygen inhalation, air with higher oxygen content can be introduced from the first channel; when the cavity needs to be sterilized, sterilizing atmosphere can be introduced from the first channel; when the harmful substances in the cavity need to be removed or reacted, the corresponding atmosphere can be introduced from the first channel.

Further, the fourth supporting mechanism 250 includes a fourth body 251, and a backup battery may be disposed in the fourth body 251 to ensure that the negative pressure system 10 can still operate when the external power supply to the negative pressure system 10 is stopped. The fourth body 251 is provided at the bottom thereof with a roller 210, and the fourth body 251 accommodates a fourth telescopic rod 252 which can be extended from the top thereof.

When the supporting device 200 is contracted, the first supporting mechanism 220, the second supporting mechanism 230, the third supporting mechanism 240 and the fourth supporting mechanism 250 can surround to form an accommodating space 290, and the closed structure 100 can be accommodated in the accommodating space 290 after being contracted and the cross beam 400 is folded, so that the portability of the negative pressure system 10 when being contracted is improved.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (10)

1. The utility model provides an air inlet mechanism, its characterized in that, includes first inlet end, the first end and the intercommunication of giving vent to anger first inlet end with the first passageway of the end of giving vent to anger, it has first gas drive unit and edge to hold in the first passageway the first filter screen, well effect filter screen and the high-efficient filter screen that the gas flow direction set gradually in the first passageway.

2. The intake mechanism as claimed in claim 1, wherein the first channel further contains an ultraviolet lamp for sterilizing and disinfecting the gas in the first channel.

3. A negative pressure system, comprising:

the sealing structure can be unfolded to form a cavity and comprises an opening and closing mechanism, and the opening and closing mechanism is used for communicating or isolating the cavity with the external space of the sealing structure;

a support device capable of deploying the enclosure;

the detection device is used for detecting the air pressure inside the closed structure; and

the gas exchange device is used for purifying and exchanging the gas inside and outside the closed structure;

the gas exchange device includes an exhaust mechanism, a purification mechanism for purifying the gas passing through the intake mechanism and the gas passing through the exhaust mechanism, and the intake mechanism of claim 1 or 2, the purification mechanism including a first purification component for purifying the gas passing through the intake mechanism and a second purification component for purifying the gas passing through the exhaust mechanism;

the air inlet mechanism is used for introducing air into the closed structure, and the exhaust mechanism is used for exhausting the air in the closed structure so as to adjust the air pressure in the closed structure to be lower than the air pressure outside the closed structure.

4. The negative pressure system of claim 3, wherein the opening and closing mechanism is a door structure for human ingress and egress.

5. The negative-pressure system of claim 3, wherein the support device comprises a plurality of support mechanisms;

the adjacent supporting mechanisms can be connected into a whole when being close to each other, and the adjacent supporting mechanisms can unfold the closed structure when being far away from each other.

6. The negative pressure system of claim 5, wherein the support mechanism includes bodies, at least one of the bodies having the air intake mechanism disposed thereon and at least one of the bodies having the air exhaust mechanism disposed thereon.

7. The negative pressure system of claim 6, wherein at least one of the bodies has an operating console disposed thereon, the operating console controlling the flow of gas through the intake mechanism and the flow of gas through the exhaust mechanism based on the pressure value detected by the detection device.

8. The negative pressure system of claim 5, wherein a top portion of the support mechanism is provided with a retractable rod that can be received in the support mechanism.

9. The negative pressure system of claim 5, further comprising a telescoping linkage for driving adjacent support mechanisms toward and away from each other.

10. The negative pressure system of claim 9, wherein the bottom of the support mechanism has rollers.

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