CN212618989U - Negative pressure system - Google Patents

Abstract

The embodiment of the utility model discloses negative pressure system. This negative pressure system includes: an enclosure that can be deployed to form a cavity. The closed structure comprises an opening and closing mechanism which is used for communicating or isolating the cavity with the external space of the closed structure. The opening and closing mechanism comprises one or two opening and closing parts, at least one side edge of each opening and closing part is integrated with the sealing structure, and the other side edges of the opening and closing parts are sealed with the adjacent sealing structure or the other opening and closing part so as to isolate the cavity from the external space of the sealing structure; and a support device capable of deploying the enclosure. The closed structure can be unfolded to form a cavity, the cavity is communicated or isolated with an external space through the opening and closing mechanism, and when the opening and closing mechanism is closed, the cavity can be completely isolated from the external space, so that the diffusion of harmful substances is effectively prevented; the opening and closing part of the opening and closing mechanism can be sealed in a magnetic attraction mode or a mechanical connection mode, so that the overall sealing performance of the negative pressure system is improved.

Description

Negative pressure system

Technical Field

The utility model relates to a protection technology field especially relates to a 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. Traditional negative pressure system prevents through forming the negative pressure that harmful substance from leaking, because traditional negative pressure system generally is for building the structure temporarily, and its seal structure that the position is unnecessary that opens and shuts is unfavorable for negative pressure system's whole leakproofness.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a negative pressure system when preventing harmful substance along with air diffusion to solve the unnecessary seal structure in the position that opens and shuts of traditional negative pressure system, the relatively poor technical problem of whole leakproofness.

In order to achieve the above object, the utility model adopts the following technical means:

a negative pressure system, comprising:

the closed structure can be unfolded to form a cavity and comprises an opening and closing mechanism, the opening and closing mechanism is used for communicating or isolating the cavity with the external space of the closed structure, the opening and closing mechanism comprises one or two opening and closing parts, at least one side edge of each opening and closing part is integrated with the closed structure, and the rest side edges of the opening and closing parts are sealed with the closed structure or the other opening and closing part adjacent to the closed structure so as to isolate the cavity from the external space of the closed structure

A support device capable of deploying the enclosure;

the detection device is used for detecting the air pressure in the cavity; and

and the gas exchange device is used for exchanging the purified gas inside and outside the cavity so as to adjust the air pressure of the cavity to be lower than the air pressure outside the closed structure.

In some embodiments of the negative pressure system, the negative pressure system further comprises a cross beam having a drive mechanism for driving the opening and closing mechanism to open and close.

In some embodiments of the negative pressure system, the opening and closing mechanism includes two opening and closing portions, the opening and closing portions are flexible structures, and the driving mechanism can drive the two opening and closing portions to be folded away, so as to open the opening and closing mechanism.

In some embodiments of the negative pressure system, the opening and closing portion has a first side, a second side, a third side and a fourth side arranged along a circumferential direction of the opening and closing portion, the two first sides are arranged oppositely and are sealed with each other in a magnetic attraction manner or a mechanical connection manner, the second side is far away from the first side and is of an integral structure with the sealing structure, the third side is sealed with the sealing structure in a magnetic attraction manner or a mechanical connection manner, the fourth side is sealed with the sealing structure in a magnetic attraction manner or a mechanical connection manner, and at least one of the third side and the fourth side is connected with the sealing structure through the cross beam.

In some embodiments of the negative pressure system, the third side is connected to the closed structure through the cross beam, and one of the two first sides and the third and fourth sides are provided with a connecting strip disposed away from the cavity.

In some embodiments of the negative pressure system, the connecting strip is surface treated to reduce its sliding friction.

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 negative pressure system further includes a passive infrared sensor, and the passive infrared sensor is used for detecting whether a person is in a preset position or not so as to control the driving mechanism to drive the opening and closing mechanism to open and close.

In some embodiments of the negative pressure system, the gas exchange device comprises an air intake mechanism, an air exhaust mechanism, and a purification mechanism for purifying gas passing through the air intake mechanism and gas passing through the air exhaust mechanism;

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

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.

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

the negative pressure system adopts a closed structure, the closed structure can be unfolded to form a cavity, the cavity is communicated or isolated with an external space through the opening and closing mechanism, and when the opening and closing mechanism is closed, the cavity can be completely isolated from the external space, so that the diffusion of harmful substances is effectively prevented; the opening and closing part of the opening and closing mechanism can be sealed in a magnetic attraction mode or a mechanical connection mode, so that the overall sealing performance of the negative pressure system is improved.

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. 6.

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.

Figure 15 is a front view of an alternative embodiment of an open-close portion of a negative pressure system folded away from the fold.

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 opening and closing mechanism 110 includes two opening and closing portions 111, and the two opening and closing portions 111 are sealed by magnetic attraction or mechanical connection to isolate the cavity from the external space of the enclosure structure 100. A sealing structure is further arranged between the two opening and closing parts 111 to further ensure the isolation of the cavity from the external space when the cavity is closed. The magnetic attraction mode can be realized by arranging a magnetic strip at the position where the two opening and closing parts 111 contact, and the magnetic strip can be a strip structure with an electromagnet or a strip structure with a permanent magnet. The mechanical connection may be formed by providing a zipper structure at a position where the two opening/closing portions 111 are in contact to achieve the closing. It is understood that in other embodiments, the opening and closing mechanism 110 includes an opening and closing portion 111, at least one side of the opening and closing portion 111 is integrated with the enclosing structure 100, and the other sides are sealed with the adjacent enclosing structure 100 by magnetic attraction or mechanical connection to isolate the cavity from the external space of the enclosing 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. The opening and closing part 111 of the opening and closing mechanism 110 can be sealed in a magnetic attraction manner or a mechanical connection manner, so that the overall sealing performance of the negative pressure system 10 is improved.

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. The side subsection 140 in this embodiment also has a viewing window 141 made of transparent media.

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 should 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 can also be sealed by magnetic attraction or mechanical connection, 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 negative pressure system 10 further includes a cross beam 280, and the cross beam 280 has a driving mechanism for driving the opening and closing mechanism 110 to open and close. The driving mechanism can drive the two opening and closing parts 111 to be deviated from the folding state, so that the opening and closing mechanism 110 is opened to form a channel for entering and exiting the cavity. As shown in fig. 15, in one embodiment, the beam 280 includes two oppositely disposed push-pull rods 281, and each push-pull rod 281 is disposed on each opening and closing portion 111 in a one-to-one correspondence. The driving motor is a linear motor which controls the opening and closing of the opening and closing part 111 by controlling the expansion and contraction amount of the push-pull rod 281. Further, the negative pressure system 10 further includes a passive infrared sensor for detecting whether a person is in a preset position, so as to control the driving mechanism to drive the opening and closing mechanism 110 to open and close. A preset position is set at a certain position outside the negative pressure system 10, for example, a position close to the opening and closing mechanism 110, when the position has a person, the passive infrared sensor can detect that the person is present at the preset position, and send a signal to control the linear motor to open the opening and closing portion 111, and when the position has no person, the passive infrared sensor does not detect that the person is present at the preset position, and send a signal to control the linear motor to close the opening and closing portion 111.

Further, the portion 111 that opens and shuts has along first side, second side, third side and the fourth side of its circumference setting, and two first sides set up relatively, realize the closure through the mode of magnetism, and the second side is kept away from first side setting and is constructed as an organic whole with enclosed structure 100, and third side and fourth side are all sealed with enclosed structure 100 through the mode of magnetism, and the third side passes through crossbeam 280 and is connected with enclosed structure 100.

As shown in fig. 14, further, one of the two first sides and the third and fourth sides are provided with a connecting strip 1111 disposed far away from the cavity. Specifically, 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 cavity atmospheric pressure is less than the outside atmospheric pressure of enclosed construction 100, the connecting strip 1111 can adsorb on the gap between two first sides and the gap between the portion 111 that opens and shuts and the enclosed construction 100 is sealed, guarantees that the cavity is kept apart from external space, and the connecting strip 1111 passes through surface treatment in order to reduce its sliding friction power, and then reduces the portion 111 that opens and shuts and open the resistance. The connecting strips 1111 can be made of flexible materials and can deform under the action of air pressure, and sealing of gaps is further guaranteed.

Referring to fig. 1 to 14, further, the supporting device 200 can unfold the enclosure structure 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 cavity. The detection device can also detect the quality of gas in the cavity. Specifically, the detection device includes a first detection device and a second detection device 400, the first detection device is used for detecting the air pressure of the cavity, and the second detection device 400 is used for detecting the air quality of the cavity. The second detection device 400 includes one or more combinations of a particulate matter sensor, a formaldehyde sensor, and a TVOC sensor. The function of the negative pressure system 10 is added and the internal environment of the cavity can be adjusted through the detection result. In this embodiment, the particulate matter sensor is a PM0.3 particulate matter sensor or may be a particulate matter sensor capable of filtering any particle size of particles equal to or larger than PM0.1 and equal to or smaller than PM 2.5. The second detecting device 400 is disposed on the first supporting mechanism 220, and the closed structure 100 is disposed with a detecting hole 410 for the second detecting device 400 to pass through.

Further, the gas exchange device is used for exchanging the purified gas inside and outside the cavity so as to adjust the air pressure of the cavity to be lower than the air pressure outside the enclosure structure 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 cavity, and the air outlet mechanism is used for discharging air in the cavity so as to adjust the air pressure of the cavity to be lower than the air pressure outside the closed structure 100. If the second detecting device 400 detects that the gas quality is poor, the gas flow of the gas exchanging device can be increased to accelerate the exchange of the gas inside and outside the cavity, so that the gas quality inside the cavity can be improved.

Specifically, the venting mechanism is in communication with the cavity for regulating the air pressure of the cavity to be lower than the air pressure outside the enclosure 100. The air inlet mechanism comprises a first air inlet end 225, a first air outlet end 226 and a first channel located between 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, and air located in an external space of the closed structure 100 is driven by the first air driving unit 500 and 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 located between 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, and air located in the cavity is driven by the second air driving unit 600 and can be exhausted out of the cavity through the second channel. The purification mechanism is including setting up in the first air purification net of first passageway and setting up in the second air purification net of second passageway, and first air purification net and second air purification net are the HEPA filter screen, and wherein, the second air purification net still has the disinfection function of disinfecting to guarantee that exhaust gas is free of harmful substance. Further, the cavity is enabled to form negative pressure through the combined action of the air inlet mechanism and the air outlet mechanism.

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 cavity 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 cavity 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, 8 to 10, and 15, 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 280 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 280.

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 280 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. A negative pressure system, comprising:

the sealing structure can be unfolded to form a cavity and comprises an opening and closing mechanism, the opening and closing mechanism is used for communicating or isolating the cavity with or from the external space of the sealing structure, the opening and closing mechanism comprises one or two opening and closing parts, at least one side edge of each opening and closing part is integrated with the sealing structure, and the rest side edges of each opening and closing part are sealed with the adjacent sealing structure or the other opening and closing part so as to isolate the cavity from 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 in the cavity; and

and the gas exchange device is used for exchanging the purified gas inside and outside the cavity so as to adjust the air pressure of the cavity to be lower than the air pressure outside the closed structure.

2. The negative pressure system of claim 1, further comprising a cross beam having a drive mechanism for driving the opening and closing mechanism to open and close.

3. The negative pressure system as claimed in claim 2, wherein the opening and closing mechanism comprises two opening and closing portions, the opening and closing portions are flexible structures, and the driving mechanism can drive the two opening and closing portions to be folded away to open the opening and closing mechanism.

4. The negative pressure system of claim 3, wherein the opening/closing portion has a first side, a second side, a third side and a fourth side, the first sides are disposed opposite to each other and are sealed by magnetic attraction or mechanical connection, the second side is disposed away from the first side and is integrated with the sealing structure, the third side is sealed by magnetic attraction or mechanical connection, the fourth side is sealed by magnetic attraction or mechanical connection, and at least one of the third side and the fourth side is connected to the sealing structure through the cross beam.

5. The negative pressure system of claim 4, wherein the third side is connected to the enclosure by the cross-beam, and one of the two first sides and the third and fourth sides have a connecting strip disposed thereon that is distal from the cavity.

6. The negative-pressure system of claim 5, wherein the connecting strips are surface treated to reduce sliding friction thereof.

7. The negative pressure system of claim 6, wherein the opening and closing mechanism is a door structure for human ingress and egress.

8. The negative pressure system as claimed in claim 7, further comprising a passive infrared sensor for detecting whether a person is in a preset position to control the driving mechanism to drive the opening and closing mechanism to open and close.

9. The negative-pressure system according to any one of claims 1 to 8, wherein the gas exchange device comprises an air inlet mechanism, an air outlet 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 air outlet mechanism;

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

10. The negative-pressure system of claim 9, 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.

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