A laminar flow bed

Abstract

The present invention provides a laminar flow bed, which comprises a bed frame, an air purification device, a bed board, disinfection columns, a circular isolation curtain and a driving device. The air purification device is arranged on the bed frame and can convey purified air downward. The bed board is arranged on the bed frame, and the bed board is located directly below the air purification device, and air outlet holes are formed therein. Four disinfection columns are arranged in parallel and are located at the four corners of the bed board. The circular isolation curtain is arranged around the four disinfection columns, and an openable and closable entrance is formed therein, and can form a closed space with the air purification device and the bed board. In the present invention, by arranging four disinfection columns between the air purification device and the bed board, and arranging the circular isolation curtain around the four disinfection columns, when the disinfection columns rotate to drive the circular isolation curtain to move, the disinfection columns disinfect the circular isolation curtain. During the disinfection process, the patient does not need to leave the laminar flow bed, and the patient will not come into contact with the outside air, which is beneficial to the patient's condition recovery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a laminar flow bed. Background Art

[0002] A laminar flow bed, also called a single-person aseptic chamber, is used to reduce the infection rate of susceptible populations and is widely used in departments such as hematology, oncology, pediatrics, and burn departments.

[0003] The laminar flow bed uses a protective curtain to block the internal and external air circulation. After long-term use, the protective curtain needs to be disinfected, and the protective curtain needs to be removed, which not only delays time, but also, if there are patients with long-term bedridden treatment on the laminar flow bed, the patients are exposed, which will also have a negative impact on the patients' conditions. And disinfecting the protective curtain manually on the laminar flow bed, since the main disinfection surface of the protective curtain, that is, the side facing the hospital bed, necessarily needs to enter the laminar flow bed. Even if the medical staff enter after disinfection, it is inevitable that external air will be brought in, affecting the patients' conditions. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a laminar flow bed, which can solve or at least alleviate one or more of the above problems and other problems existing in the prior art.

[0005] The present invention provides a laminar flow bed, comprising:

[0006] A bed frame;

[0007] An air purification device, arranged on the bed frame, capable of delivering purified air downward;

[0008] A bed board, arranged on the bed frame, below the air purification device, and having air outlet holes formed thereon;

[0009] Four disinfection columns, arranged in parallel, located at the four corners of the bed board, and arranged between the bed board and the air purification device;

[0010] A ring-shaped isolation curtain, arranged around the four disinfection columns, having an openable and closable entrance formed thereon, and capable of enclosing a sealed space with the air purification device and the bed board; and

[0011] A driving device, driving the ring-shaped isolation curtain to rotate around the four disinfection columns; the disinfection columns can disinfect the inner wall of the ring-shaped isolation curtain outside them.

[0012] Preferably, the driving device comprises:

[0013] A motor, located below the bed board, and connected to the lower ends of the disinfection columns;

[0014] There are four sprockets, which are coaxially connected to the lower ends of the corresponding disinfection columns respectively; and

[0015] The chain is connected with the four sprockets at the same time.

[0016] Preferably, the disinfection column has:

[0017] A cylindrical working section in contact with the annular isolation curtain;

[0018] Two pulley sections, connected to both ends of the cylindrical working section respectively; and

[0019] A cylindrical connecting section, two sections, respectively connected to one end of the pulley section away from the cylindrical working section, respectively passing through the bed board and the air purification device, one of the cylindrical connecting sections being connected to the motor;

[0020] The pulley sections on the upper and lower sides of the four cylindrical working sections are connected by belts; the annular isolation curtain is located between two of the belts, and the upper and lower ends of the annular isolation curtain are respectively connected to the belts on both sides.

[0021] Preferably, it also includes an infusion device, the cylindrical connecting section and the pulley section above the cylindrical working section are both provided with a first liquid hole passing through, the upper end of the cylindrical working section is provided with a second liquid hole along the radial direction, the second liquid hole is connected to the first liquid hole, and the infusion device is used to input disinfectant from the top to the first liquid hole.

[0022] Preferably, four cover plates are further included, the upper and lower ends of the cover plates are respectively connected to the air purification device and the bed board, and the cover plates are located on the inner sides of the corresponding cylindrical working sections.

[0023] Preferably, it also includes:

[0024] Two annular seals are sleeved on the four cylindrical connecting sections on the same side through openings, and can move closer to or away from the belt on the same side;

[0025] Two elastic annular sealing curtains, one end of which is connected to the outer edge of the annular sealing member on the same side away from the belt, and the other end of which can be connected to the air purification device or the bed board on the same side; and

[0026] The sealing device can drive the annular seal to move closer to or away from the belt on the same side by means of the rotation of the cylindrical connecting section.

[0027] Preferably, the sealing device comprises:

[0028] The first sleeves, eight in number, are sleeved on the corresponding cylindrical connecting sections and are connected to the air purification device or the bed board on the same side;

[0029] The second sleeves are provided corresponding to the first sleeves, sleeved on the first sleeves, and the inner walls thereof are threadedly connected to the outer walls of the first sleeves;

[0030] The bearings are provided corresponding to the second sleeves, and the inner rings are connected to the outer walls of the upper ends of the second sleeves;

[0031] The first connecting member has one end connected to the outer ring of the bearing and the other end connected to the annular seal; and

[0032] The sealing mechanism is provided corresponding to the second sleeve, and the rotation of the cylindrical connecting section drives the second sleeve to rotate in two different directions.

[0033] Preferably, the sealing mechanism includes:

[0034] The first driving ring, the inner wall of which is connected to the outer wall of the cylindrical connecting section;

[0035] The second driving ring is sleeved outside the second sleeve and is in clearance fit with the second sleeve;

[0036] The second connecting member has two ends respectively connected to the first driving ring and the second driving ring; and

[0037] The mating ring, the inner ring of which is connected to the outer wall of the second sleeve, and one mating block is connected to each of the upper and lower end faces thereof;

[0038] Elastically retractable wedge blocks are respectively provided on the opposite sides of the first driving ring and the second driving ring. Both of the two wedge blocks have inclined surfaces and vertical surfaces. The inclined directions of the inclined surfaces of the two wedge blocks are the same, and the inclined surfaces and vertical surfaces of the two wedge blocks can abut against the mating blocks on the same side.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] In the technology of the present invention, by arranging four disinfection columns between the air purification device and the bed board, and arranging the annular isolation curtain around the four disinfection columns, when the disinfection columns rotate to drive the annular isolation curtain to move, the disinfection columns disinfect the annular isolation curtain. During the disinfection process, the patient does not need to leave the laminar flow bed, and the patient will not contact the outside air, which is beneficial to the patient's condition recovery. Description of the Drawings

[0041] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0042] Figure 1 A perspective view of a laminar flow bed in an embodiment of the present invention;

[0043] Figure 2 For Figure 1 Another perspective view (without the annular isolation curtain);

[0044] Figure 3 For Figure 2 Another perspective view (without the support plate);

[0045] Figure 4 For Figure 2 Another perspective view (looking up);

[0046] Figure 5 For Figure 2 A perspective view of the disinfection column of

[0047] Figure 6 For Figure 2 Another perspective view (without the air purification device and the bed board);

[0048] Figure 7 For Figure 6 A sectional view of the AA plane of

[0049] Figure 8 For Figure 7 An enlarged view of part B of

[0050] Figure 9 For Figure 6 A perspective view of part C of

[0051] Reference numerals:

[0052] 10, bed frame; 11, bed board; 12, support plate;

[0053] 20, air purification device;

[0054] 30, disinfection column; 31, cylindrical working section; 32, pulley section; 33, cylindrical connection section; 34, belt; 35, first liquid passing hole; 36, second liquid passing hole;

[0055] 40, annular isolation curtain; 41, inlet;

[0056] 50, driving device; 51, motor; 52, sprocket; 53, chain;

[0057] 60. Cover plate;

[0058] 70. Annular seal; 71. Annular seal curtain;

[0059] 80. Sealing device; 81. First sleeve; 82. Second sleeve; 83. Bearing; 84. First connecting piece; 85. Sealing mechanism; 851. First driving ring; 852. Second driving ring; 853. Second connecting piece; 854. Fitting ring; 855. Fitting block; 856. Wedge block; 857. Spring; 858. Limiting plate. Detailed implementation manners

[0060] The embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0061] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present invention belongs.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention.

[0063] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present invention, "a plurality" means more than two, unless otherwise specifically defined.

[0064] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0066] See Figures 1 to 9 , this embodiment provides a laminar flow bed, including a bed frame 10, an air purification device, a bed board 11, a disinfection column 30, an annular isolation curtain 40 and a driving device 50.

[0067] The air purification device adopts the prior art and is arranged on the bed frame 10, and can convey purified air downward. The bed board 11 is arranged on the bed frame 10, and the bed board 11 is directly below the air purification device, and air outlet holes are formed therein. Four disinfection columns 30 are arranged in parallel, located at the four corners of the bed board 11, and are arranged between the bed board 11 and the air purification device, and the four disinfection columns 30 are all vertically arranged.

[0068] The annular isolation curtain 40 is arranged around the four disinfection columns 30, and an openable and closable entrance 41 is formed therein, and can form a closed space with the air purification device and the bed board 11. Specifically, the annular isolation curtain 40 can adopt a transparent material in the prior art. The specific setting of the openable and closable entrance 41 on the annular isolation curtain 40 is: a window allowing people to enter and exit is opened on one side of the annular isolation curtain 40, and a door curtain made of the same material as the annular isolation curtain 40 is further provided, and the door curtain is connected to the window by means of magic tape or magnetic attraction. The driving device 50 drives the annular isolation curtain 40 to rotate around the four disinfection columns 30. In addition, a hollow support plate 12 is provided above the bed board 11, and the support plate 12 is used for laying bedding, and the hollow support plate 12 can avoid water accumulation and wetting the bedding.

[0069] In this embodiment, the patient enters through the entrance 41 of the annular isolation curtain 40. The air purified by the air purification device 20 is blown out from above the patient and discharged through the air outlet holes (the air outlet holes are not shown in the figure) on the bed board 11. In the prior art, the lengths of hospitalization of patients who need to use a laminar flow bed vary. Patients who use a laminar flow bed for a long time should avoid excessive contact with the outside air. The curtain for isolating the inside and outside must be disinfected after being used for a period of time to avoid affecting the clean air inside. The curtain needs to be removed for disinfection, and the patient will be exposed to the outside air. In addition, the existing curtains are usually soft and wrinkled, and disinfection is not very convenient. The annular isolation curtain 40 of this laminar flow bed can be directly disinfected during the use of the patient, that is, the annular isolation curtain 40 is driven to rotate on the four disinfection columns 30 by the driving device 50, and the disinfection columns 30 can roll on the inner wall of the annular isolation curtain 40, so that the inner wall of the annular isolation curtain 40 is disinfected by the four disinfection columns 30. The outer wall of the disinfection column 30 can be provided with disinfectant solution. During the disinfection process, the patient will not be exposed to the outside air, which is beneficial to the patient's recovery from the illness.

[0070] In one embodiment, the driving device 50 includes a motor 51, a sprocket 52 and a chain 53.

[0071] The motor 51 is located below the bed board 11 and is connected to the lower end of the disinfection column 30. Specifically, each lower end of the disinfection columns 30 can be respectively connected to a motor 51, or one disinfection column 30 can be selected to be connected to a motor 51. There are four sprockets 52, and the four sprockets 52 are respectively coaxially connected to the lower ends of the corresponding disinfection columns 30. The chain 53 is connected to the four sprockets 52 at the same time.

[0072] In this embodiment, the motor 51 drives the disinfection column 30 to rotate, and the disinfection column 30 drives the other disinfection columns 30 to rotate through the chain 53. The annular isolation curtain 40 wound around the four disinfection columns 30 can be driven by the disinfection column 30 to move, and the disinfection column 30 can disinfect the passing annular isolation curtain 40.

[0073] In one embodiment, the disinfection column 30 has a cylindrical working section 31, a pulley section 32 and a cylindrical connection section 33.

[0074] The cylindrical working section 31 contacts the annular isolation curtain 40. There are two pulley sections 32, which are respectively connected to both ends of the cylindrical working section 31. There are two cylindrical connection sections 33, which are respectively connected to the ends of the pulley section 32 far from the cylindrical working section 31, and one of the cylindrical connection sections 33 is connected to the motor 51.

[0075] The pulley sections 32 on the upper and lower sides of the four cylindrical working sections 31 are respectively connected by belts 34; the annular isolation curtain 40 is located between the two belts 34, and the upper and lower ends of the annular isolation curtain 40 are respectively connected to the belts 34 on both sides and pass through the bed board 11 and the air purification device 20.

[0076] In this embodiment, the cylindrical connecting section 33 is respectively rotatably inserted on the bed board 11 or the air purification device 20, and the cylindrical connecting section 33 forms a dynamic seal with both the bed board 11 and the air purification device 20. The motor 51 drives the cylindrical connecting section 33, the pulley section 32 and the cylindrical working section 31 to rotate, and the cylindrical working section 31 drives the annular isolation curtain 40 to rotate and move. At the same time, during the process that the pulley section 32 drives the belt 34 to rotate and move, the belt 34 can also drive the annular isolation curtain 40 to rotate, so that the annular force isolation curtain can stably move around the disinfection column 30. Under the dual action of the cylindrical working section 31 and the belt 34, the annular isolation curtain 40 can be relatively flat, and the cylindrical working section 31 of the disinfection column 30 can effectively disinfect it.

[0077] In one embodiment, it further includes an infusion device. Through holes of the first liquid passing holes 35 are respectively formed in the cylindrical connecting section 33 and the pulley section 32 above the cylindrical working section 31, and a second liquid passing hole 36 along the radial direction is formed at the upper end of the cylindrical working section 31. The second liquid passing hole 36 is communicated with the first liquid passing hole 35, and the infusion device is used to input disinfectant liquid into the first liquid passing hole 35 from above. The infusion device is arranged in the air purification device 20.

[0078] In this embodiment, the infusion device adopts the existing technology and stores disinfectant liquid such as alcohol (harmless to the human body) therein. After the infusion device inputs the disinfectant liquid into the first liquid passing holes 35 of the cylindrical connecting section 33 and the pulley section 32, it flows horizontally through the second liquid passing hole 36 and then flows downward from the outer wall of the upper end of the cylindrical working section 31. During the rotation of the cylindrical working section 31, the disinfectant liquid is applied to the inner wall of the annular isolation curtain 40. In addition, a water-absorbing and water-storing substance such as sponge can be coated on the cylindrical working section 31, so that the entire cylindrical working section 31 remains moist, can continuously disinfect the annular isolation curtain 40, and can also make the entire inner wall of the annular isolation curtain 40 contact with the disinfectant liquid on the cylindrical working section 31. The connection mode of the upper and lower two belts 34 and the annular isolation curtain 40 enables the annular isolation curtain 40 to always remain flat and not wrinkled.

[0079] In one embodiment, it further includes four cover plates 60. The upper and lower ends of the cover plates 60 are respectively connected to the air purification device 20 and the bed board 11, and the cover plates 60 are located inside the corresponding cylindrical working sections 31.

[0080] In this embodiment, the cover plates 60 can cover the disinfection column 30. On the one hand, it is beautiful, and on the other hand, it can prevent the bedding on the bed from contacting the disinfection column 30. In addition, the cover plates 60 also play a connecting role and connect the air purification device 20 and the bed board 11.

[0081] In one embodiment, it further includes two annular seals 70, two annular seal curtains 71 and a sealing device 80.

[0082] The belt 34 drives the annular isolation curtain 40 to move around the disinfection column 30. The belt 34 should not interfere with the bed board 11 and the air purification device 20. If the laminar flow bed is to ensure the one-way flow of air inside, keeping it sealed is a better choice. The movement of the belt 34 will inevitably lead to poor sealing effect of the entire laminar flow bed. Therefore, the following settings are required:

[0083] The two annular seals 70 are sleeved on the four cylindrical connecting sections 33 on the same side through the openings, and can move closer to or away from the belt 34 on the same side.

[0084] One end of the two annular sealing curtains 71 is connected to the outer edge of one end of the annular sealing member 70 on the same side away from the belt 34, and the other end of the two annular sealing curtains 71 can be connected to the air purification device 20 or the bed board 11 on the same side. The two annular sealing curtains 71 are elastic and retractable. Specifically, the entire laminar bed is arranged from top to bottom as follows: the air purification device 20, the annular sealing curtain 71, the annular sealing member 70, the belt 34, the annular isolation curtain 40, the belt 34, the annular sealing member 70, the annular sealing curtain 71 and the bed board 11. The sealing device 80 can drive the annular sealing member 70 to move closer to or away from the belt 34 on the same side by the rotation of the cylindrical connecting section 33.

[0085] In this embodiment, the annular seal 70 can be driven to approach the belt 34 and then contact the belt 34 to achieve sealing by the rotation of the cylindrical connecting section 33, or the annular seal 70 can be driven to move away from the belt 34 so that there is a gap between the belt 34 and the annular seal 70, so that the belt 34 can move freely. By driving the annular seal 70 to move by the cylindrical connecting section 33, the setting of power devices such as the motor 51 can be reduced, and the noise can be reduced.

[0086] In one embodiment, the sealing device 80 includes a first sleeve 81 , a second sleeve 82 , a bearing 83 , a first connecting member 84 and a sealing mechanism 85 .

[0087] There are eight first sleeves 81, which are sleeved on the corresponding cylindrical connecting section 33 and connected to the air purification device 20 or the bed board 11 on the same side. The second sleeve 82 is arranged corresponding to the first sleeve 81, sleeved on the first sleeve 81, and its inner wall is threadedly connected to the outer wall of the first sleeve 81. The bearing 83 is arranged corresponding to the second sleeve 82, and the inner ring is connected to the outer wall of the upper end of the second sleeve 82. One end of the first connecting member 84 is connected to the outer ring of the bearing 83, and the other end of the first connecting member 84 is connected to the annular seal 70. The sealing mechanism 85 is arranged corresponding to the second sleeve 82, and the second sleeve 82 can be rotated in two different directions by the rotation of the cylindrical connecting section 33.

[0088] In this embodiment, the sealing mechanism 85 rotates with the help of the cylindrical connecting section 33, thereby driving the second sleeve 82 to rotate forward or reversely. Since the inner wall of the second sleeve 82 is threadedly connected to the first sleeve 81, the second sleeve 82 rotates to move up and down along the first sleeve 81. Then, the annular seal 70 is driven to move up and down through the bearing 83 and the first connecting member 84 (the annular seal 70 is close to or away from the belt 34).

[0089] The sealing mechanism 85 includes a first driving ring 851 , a second driving ring 852 , a second connecting member 853 and a matching ring 854 .

[0090] The inner wall of the first driving ring 851 is connected to the outer wall of the cylindrical connecting section 33. The second driving ring 852 is sleeved outside the second sleeve 82 and is loosely matched with the second sleeve 82. The two ends of the second connecting member 853 are respectively connected to the first driving ring 851 and the second driving ring 852. The inner ring of the matching ring 854 is connected to the outer wall of the second sleeve 82, and a matching block 855 is respectively connected to the upper and lower end faces thereof. On the opposite sides of the first driving ring 851 and the second driving ring 852, elastically retractable wedge blocks 856 are respectively provided. Both wedge blocks 856 have inclined surfaces and vertical surfaces. The inclined surfaces of the two wedge blocks 856 have the same inclination direction, and the inclined surfaces and vertical surfaces of the two wedge blocks 856 can be abutted against the matching blocks 855 on the same side. Specifically, the shape of the wedge block 856 is formed by connecting a rectangular parallelepiped and a triangular prism. A placement hole is provided on the opposite side of the first driving ring 851 and the second driving ring 852. The rectangular part of the wedge block 856 is inserted into the placement hole. A spring 857 is also provided in the placement hole. The two ends of the spring 857 are respectively connected to the end of the wedge block 856 and the bottom of the placement hole. The wedge block 856 can slide in and out of the placement hole. In addition, a limit plate 858 extending inward is provided at the opening of the placement hole. The overall cross-section of the rectangular part of the wedge block 856 is larger than the cross-section of the triangular prism. After the rectangular part of the wedge block 856 slides out, it abuts against the limit plate 858, so that the wedge block 856 can slide in the placement hole to a limited extent and will not be separated from the placement hole, and the elastic expansion and contraction of the wedge block 856 is also realized.

[0091] In this embodiment, the cylindrical connecting section 33 has two rotatable directions, tentatively defined as forward rotation (counterclockwise) and reverse rotation (clockwise). Figure 9, after the positive rotation of the cylindrical connecting section 33, the first driving ring 851 and the second driving ring 852 are driven to rotate positively at the same time. The vertical surface of the lower wedge block 856 abuts against the mating block 855 on the same side, thereby driving the second sleeve 82 to rotate positively and rise. As the second sleeve 82 rises, the lower mating block 855 rises and disengages from the wedge block 856 on the same side. At this time, the second sleeve 82 is no longer driven and thus remains stationary in place. During the rotation of the upper wedge block 856, its inclined surface abuts against the mating block 855 on the same side, causing the wedge block 856 itself to be compressed and rebound into the second driving ring 852, so that the second sleeve 82 remains stationary in place. That is to say, after the rotation of the cylindrical connecting section 33 only drives the second sleeve 82 to rise a certain distance, the second sleeve 82 remains in place, and the cylindrical connecting section 33 can still continue to rotate in the previous direction.

[0092] Similarly, after the reverse rotation of the cylindrical connecting section 33, the vertical surface of the upper wedge block 856 abuts against the upper mating block 855, thereby driving the second sleeve 82 to rotate reversely and move downward until the upper wedge block 856 disengages from the mating block 855 on the same side.

[0093] That is to say, during the process of the motor 51 driving the disinfection column 30 to rotate, the sealing mechanism 85 can be used to keep the annular seal 70 in a proper position, and the disinfection column 30 can continue to rotate to disinfect the annular isolation curtain 40. After disinfection is completed, the motor 51 can be reversed to drive the annular seal 70 to abut against the belt 34 again to form a seal.

[0094] In the description of the present invention, a large number of specific details are set forth. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. A laminar flow bed, characterized in that: include: Bed frame (10); An air purification device (20) is arranged on the bed frame (10) and can transport purified air downward; A bed board (11) is arranged on the bed frame (10) and is located below the air purification device (20), and is provided with an air outlet hole; Four disinfection columns (30) are arranged in parallel with each other and are located at the four corners of the bed board (11) and are arranged between the bed board (11) and the air purification device (20); an annular isolation curtain (40) arranged around the four disinfection columns (30), having an openable and closable entrance (41) formed thereon, and capable of forming a closed space together with the air purification device (20) and the bed board (11); and A driving device (50) drives the annular isolation curtain (40) to rotate around the four disinfection columns (30); the disinfection columns (30) can disinfect the inner wall of the annular isolation curtain (40) outside the disinfection columns; The driving device (50) comprises: A motor (51), located below the bed board (11) and connected to the lower end of the disinfection column (30); Four sprockets (52) are provided and are coaxially connected to the lower ends of the corresponding disinfection columns (30); and A chain (53) connected to the four sprockets (52); The disinfection column (30) has: A cylindrical working section (31) in contact with the annular isolation curtain (40); Two pulley sections (32) are respectively connected to two ends of the cylindrical working section (31); and Two cylindrical connecting sections (33), respectively connected to one end of the pulley section (32) away from the cylindrical working section (31), respectively passing through the bed board (11) and the air purification device (20), one of the cylindrical connecting sections (33) being connected to the motor (51); The pulley sections (32) on the upper and lower sides of the four cylindrical working sections (31) are connected by belts (34); the annular isolation curtain (40) is located between two of the belts (34), and the upper and lower ends of the annular isolation curtain (40) are respectively connected to the belts (34) on both sides; The laminar flow bed further comprises: Two annular sealing members (70) are sleeved on the four cylindrical connecting sections (33) on the same side through openings, and can move closer to the belt (34) on the same side or move away from the belt (34) on the same side; two elastic annular sealing curtains (71), one end of which is connected to the outer edge of one end of the annular sealing member (70) on the same side away from the belt (34), and the other end of which can be connected to the air purification device (20) or the bed board (11) on the same side; and A sealing device (80) can drive the annular sealing member (70) to move closer to or away from the belt (34) on the same side by means of the rotation of the cylindrical connecting section (33); It also includes an infusion device, wherein the cylindrical connecting section (33) above the cylindrical working section (31) and the pulley section (32) are both provided with a first liquid passage hole (35) extending therethrough, and the upper end of the cylindrical working section (31) is provided with a second liquid passage hole (36) along a radial direction, the second liquid passage hole (36) being in communication with the first liquid passage hole (35), and the infusion device is used to feed disinfectant from above to the first liquid passage hole (35); It also includes four cover plates (60), the upper and lower ends of the cover plates (60) being respectively connected to the air purification device (20) and the bed plate (11), and the cover plates (60) being located on the inner side of the corresponding cylindrical working sections (31); The sealing device (80) comprises: Eight first sleeves (81) are provided, sleeved on the corresponding cylindrical connecting sections (33), and connected to the air purification device (20) or the bed board (11) on the same side; A second sleeve (82), arranged corresponding to the first sleeve (81), sleeved on the first sleeve (81), and having an inner wall threadably connected to an outer wall of the first sleeve (81); A bearing (83) is arranged corresponding to the second sleeve (82), and the inner ring is connected to the outer wall of the upper end of the second sleeve (82); a first connecting member (84), one end of which is connected to the outer ring of the bearing (83), and the other end of which is connected to the annular sealing member (70); and a sealing mechanism (85) arranged corresponding to the second sleeve (82), and capable of driving the second sleeve (82) to rotate in two different directions by means of the rotation of the cylindrical connecting section (33); The sealing mechanism (85) comprises: A first driving ring (851), the inner wall of which is connected to the outer wall of the cylindrical connecting section (33); A second drive ring (852) is sleeved outside the second sleeve (82) and is clearance-matched with the second sleeve (82); a second connecting member (853), two ends of which are respectively connected to the first driving ring (851) and the second driving ring (852); and A matching ring (854), the inner ring of which is connected to the outer wall of the second sleeve (82), and the upper and lower end surfaces of which are respectively connected to a matching block (855); Elastically retractable wedge blocks (856) are respectively provided on opposite sides of the first drive ring (851) and the second drive ring (852); both of the two wedge blocks (856) have an inclined surface and a vertical surface; the inclined surfaces of the two wedge blocks (856) have the same inclination direction; and both the inclined surfaces and the vertical surfaces of the two wedge blocks (856) can abut against the matching block (855) on the same side.

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