A negative pressure ward and biological laboratory ceiling system

Abstract

A negative pressure ward and biological laboratory ceiling system of the present invention comprises: a top plate and a bottom plate, a fixing block is arranged between the top plate and the bottom plate, a mounting groove is arranged on the fixing block, a ventilation pipe passes through the mounting groove, one end of a first connecting rod is connected to the top of the fixing block, the other end of the first connecting rod is connected to the first connecting plate, the first connecting plate is connected to the top plate by screws, one end of a second connecting rod is connected to the bottom end of the fixing block, the other end of the second connecting rod is connected to the second connecting plate, and the second connecting plate is connected to the bottom plate by screws. The purpose of the present invention is to provide an integrated, quick-installation, and easy-to-clean negative pressure ward and biological laboratory ceiling system.

Description

Technical Field

[0001] The invention belongs to the technical field of suspended ceilings, and in particular relates to a suspended ceiling system for a negative pressure ward and a biological laboratory. Background Art

[0002] Biological laboratories are places for conducting experiments related to biological sciences. As the requirements for quality control become more and more stringent, the demand for constant temperature and humidity environments is increasing, and the application areas are becoming wider and wider. Schools will have biological laboratories, and blood test laboratories in hospitals are also biological laboratories; wards are places for patients to be treated and cared for. Both biological laboratories and wards need to install exhaust ducts, fresh air systems, water, electricity, gas, etc. to meet the needs of daily activities. Biological laboratories and wards need to be suspended during the decoration process, and various pipes need to be laid. In the existing ceiling system, pipes are mostly laid separately, and the construction time is long, which cannot meet the needs of rapid assembly and construction of wards and laboratories. Summary of the invention

[0003] Therefore, the present invention aims to solve the problem that the construction time of the technical suspended ceiling is long and the assembly is inconvenient.

[0004] To this end, the technical solution adopted is that a negative pressure ward and biological laboratory ceiling system of the present invention includes: a top plate and a bottom plate, a fixing block is arranged between the top plate and the bottom plate, a mounting groove is arranged on the fixing block, a ventilation pipe passes through the mounting groove, one end of a first connecting rod is connected to the top end of the fixing block, the other end of the first connecting rod is connected to the first connecting plate, the first connecting plate is connected to the top plate by screws, one end of the second connecting rod is connected to the bottom end of the fixing block, the other end of the second connecting rod is connected to the second connecting plate, and the second connecting plate is connected to the bottom plate by screws.

[0005] Preferably, a first through hole is provided on the fixing block, and the water inlet pipe passes through the first through hole.

[0006] Preferably, a second through hole is provided on the fixing block, and the drain pipe passes through the second through hole.

[0007] Preferably, a third through hole is provided on the fixing block, and the wire tube passes through the third through hole.

[0008] Preferably, a fourth through hole is provided on the fixing block, and the fresh air duct passes through the fourth through hole.

[0009] Preferably, the ventilation pipe is provided with a negative pressure ventilation device, and the negative pressure ventilation device comprises: a box, a square table, a cylinder,

[0010] The cross section of the ventilation pipe is rectangular, a box is arranged on the outer wall of the ventilation pipe, a square platform is arranged in the box, a motor is arranged on the square platform, and the output shaft of the motor is arranged in a horizontal direction and connected to the first gear;

[0011] A fixing plate is arranged below the motor, the fixing plate is fixedly connected to the outer wall of the square table, the fixing plate is arranged on the first sliding groove extending in the length direction, the first sliding groove is arranged in the first sliding groove, the first sliding groove is arranged with a first slider, the first sliding groove can reciprocate along the first sliding groove, a tubular spring is arranged in the first sliding groove, one end of the tubular spring is connected to the right end of the first sliding groove, the other end of the tubular spring is connected to the inner wall of the first sliding groove, a clamping groove extending in the length direction is arranged on the inner wall of the first sliding groove, a clamping block is arranged on the side wall of the first sliding block, the clamping block is located in the clamping groove, a first rotating shaft is arranged on the first sliding block, one end of the first rotating shaft is rotatably connected to the first sliding block, a second gear is arranged at the other end of the first rotating shaft, and the first gear is meshed with the second gear;

[0012] A second rotating shaft is arranged below the first rotating shaft, one end of the second rotating shaft is rotatably connected to the outer wall of the square platform, a third gear is arranged on the second rotating shaft, the third gear is meshed with the second gear, the axis center of the first gear, the axis center of the second gear and the axis center of the third gear are on the same straight line, a vertical guide opening is arranged on the outer wall of the ventilation pipe, the other end of the second rotating shaft passes through the guide opening and extends into the ventilation pipe and is connected to the cylinder, and the cylinder is provided with a plurality of fan blades along the circumferential direction.

[0013] Preferably, a cleaning device is also included, and the cleaning device includes: a second slider, an eccentric block, an ultraviolet lamp, and bristles.

[0014] The left and right sides of the inner wall of the box body are respectively provided with second slide grooves, and the two sides of the square table are respectively provided with second sliders, and the second sliders can reciprocate up and down in the second slide grooves. The top of the square table is provided with a first spring, one end of the first spring is connected to the top of the square table, and the other end of the first spring is connected to the top of the inner wall of the box body. The bottom end of the square table is provided with a second spring, one end of the second spring is connected to the bottom end of the square table, and the other end of the second spring is connected to the bottom of the inner wall of the box body;

[0015] An eccentric block is arranged on the second rotating shaft, and the eccentric block is located in the cylinder. Ultraviolet lamps are arranged above and below the cylinder respectively, and the ultraviolet lamps are installed on the inner wall of the ventilation pipe. Bristles are arranged on one end of the fan blade away from the cylinder.

[0016] Preferably, a shell is provided on the outer wall of the square table, the first gear, the second gear and the third gear are all located in the shell, an axial hole is provided on the shell, the second rotating shaft passes through the axial hole, a horizontal infusion tube is provided under the shell, one end of the third connecting rod is connected to the outer wall of the shell, the other end of the third connecting rod is connected to the infusion tube, the infusion tube is perpendicular to the third connecting rod, a liquid storage tank and a pressure pump are respectively provided on the outer walls of the box body, one end of the connecting tube is connected to the liquid storage tank, the other end of the connecting tube is connected to the input port of the pressure pump, the output port of the pressure pump is connected to one end of a hose, the other end of the hose extends into the box body and is connected to one end of the infusion tube, the other end of the infusion tube passes through the guide port and is connected to the nozzle, and the nozzle faces the bristles.

[0017] Preferably, a liquid inlet pipe is provided on the outer wall of the liquid storage tank.

[0018] Preferably, a sealing cover is provided on the liquid inlet pipe, and the liquid inlet pipe is threadedly connected to the sealing cover.

[0019] The technical solution of the present invention has the following advantages: a negative pressure ward and biological laboratory ceiling system of the present invention comprises: a top plate and a bottom plate, a fixing block is arranged between the top plate and the bottom plate, a mounting groove is arranged on the fixing block, a ventilation pipe passes through the mounting groove, one end of a first connecting rod is connected to the top of the fixing block, the other end of the first connecting rod is connected to the first connecting plate, the first connecting plate is connected to the top plate by screws, one end of a second connecting rod is connected to the bottom end of the fixing block, the other end of the second connecting rod is connected to the second connecting plate, and the second connecting plate is connected to the bottom plate by screws. Since in the process of ceiling, the ventilation pipe, water inlet pipe, drainage pipe, wire pipe, fresh air pipe can be integrated on the fixing block, the top plate, the bottom plate and the fixing block can be assembled in advance, so that the ceiling system is modularized, and then the top plate 1 is fixed on the top of the ward and the biological laboratory, so as to quickly complete the installation of the ceiling system, reducing the time of on-site construction.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the installation structure of the box body in the present invention;

[0025] Figure 3 It is a structural schematic diagram of the negative pressure ventilation device in the present invention;

[0026] Figure 4 yes Figure 3 A in the enlarged view;

[0027] Figure 5 It is a structural schematic diagram of the fixing plate in the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the gear set in the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the cylinder in the present invention;

[0030] Figure 8 It is a structural schematic diagram of the second chute and the second slider in the present invention;

[0031] Fig. 9 It is a schematic diagram of the cleaning structure of the present invention;

[0032] Among them, 1-top plate, 2-bottom plate, 3-fixed block, 4-installation groove, 5-ventilation pipe, 6-first connecting rod, 7-first connecting plate, 8-second connecting rod, 9-second connecting plate, 10-first through hole, 11-water inlet pipe, 12-second through hole, 13-drain pipe, 14-third through hole, 15-wire tube, 16-fourth through hole, 17-fresh air duct, 18-box, 19-square table, 20-motor, 21-first gear, 22-fixed plate, 23-first slide groove, 24-first slider, 25-slot, 26-block, 2 7-first rotating shaft, 28-second gear, 29-second rotating shaft, 30-third gear, 31-guide port, 32-cylinder, 33-fan blade, 34-second slide groove, 35-second slider, 36-first spring, 37-second spring, 38-eccentric block, 39-ultraviolet lamp, 40-bristles, 41-shell, 42-axial hole, 43-infusion tube, 44-third connecting rod, 45-liquid storage tank, 46-pressure pump, 47-hose, 48-nozzle, 49-liquid inlet pipe, 50-sealing cover, 51-connecting tube, 52-tubular spring. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0034] The present invention provides a negative pressure ward and biological laboratory ceiling system, such as Figure 1 As shown, it includes: a top plate 1 and a bottom plate 2, a fixed block 3 is arranged between the top plate 1 and the bottom plate 2, a mounting groove 4 is arranged on the fixed block 3, a ventilation pipe 5 passes through the mounting groove 4, one end of a first connecting rod 6 is connected to the top of the fixed block 3, the other end of the first connecting rod 6 is connected to the first connecting plate 7, the first connecting plate 7 is connected to the top plate 1 by screws, one end of a second connecting rod 8 is connected to the bottom end of the fixed block 3, the other end of the second connecting rod 8 is connected to the second connecting plate 9, and the second connecting plate 9 is connected to the bottom plate 2 by screws. The air inlet end of the ventilation pipe 5 extends to the bottom end surface of the bottom plate 2, and the air outlet end of the ventilation pipe 5 extends to the outside, and the air in the laboratory is discharged to the outside atmosphere through the ventilation pipe 5. A first through hole 10 is arranged on the fixed block 3, and a water inlet pipe 11 passes through the first through hole 10. A second through hole 12 is arranged on the fixed block 3, and a drain pipe 13 passes through the second through hole 12. The fixing block 3 is provided with a third through hole 14, through which a wire tube 15 passes, and various cables are integrated in the wire tube 15. The fixing block 3 is provided with a fourth through hole 16, through which a fresh air duct 17 passes.

[0035] The working principle and beneficial technical effects of the above technical solution are as follows: during the process of ceiling installation, the ventilation pipe 5, the water inlet pipe 11, the drainage pipe 13, the wire pipe 15, and the fresh air pipe 17 can be integrated on the fixing block 3, and the top plate 1, the bottom plate 2 and the fixing block 3 can be assembled in advance, making the ceiling system modular, and then the top plate 1 is fixed on the top of the ward and the biological laboratory to quickly complete the installation of the ceiling system and reduce the time of on-site construction.

[0036] In one embodiment, Figure 2-7 As shown, the ventilation pipe 5 is provided with a negative pressure ventilation device, which includes: a box 18, a square table 19, a cylinder 32,

[0037] The cross section of the ventilation pipe 5 is rectangular, a box 18 is arranged on the outer wall of the ventilation pipe 5, a square platform 19 is arranged inside the box 18, a motor 20 is arranged on the square platform 19, and the output shaft of the motor 20 is arranged in a horizontal direction and connected to the first gear 21;

[0038] A fixing plate 22 is provided below the motor 20, and the fixing plate 22 is fixedly connected to the outer wall of the square platform 19, and a first slide groove 23 extending along the length direction is provided on the fixing plate 22, and a first slider 24 is provided in the first slide groove 23, and the first slider 24 can reciprocate along the first slide groove 23, and a tubular spring 52 is provided in the first slide groove 23, and one end of the tubular spring 52 is connected to the right end of the first slider 24, and the other end of the tubular spring 52 is connected to the inner wall of the first slide groove 23, and a clamping groove 25 extending along the length direction is provided on the inner wall of the first slide groove 23, and a clamping block 26 is provided on the side wall of the first slider 24, and the clamping block 26 is located in the clamping groove 25, and a first rotating shaft 27 is provided on the first slider 24, and one end of the first rotating shaft 27 is rotatably connected to the first slider 24, and a second gear 28 is provided at the other end of the first rotating shaft 27, and the first gear 21 is meshed with the second gear 28;

[0039] A second rotating shaft 29 is arranged below the first rotating shaft 27, and one end of the second rotating shaft 29 is rotatably connected to the outer wall of the square platform 19, and a third gear 30 is arranged on the second rotating shaft 29, and the third gear 30 is meshed with the second gear 28. The axis of the first gear 21, the axis of the second gear 28, and the axis of the third gear 30 are on the same straight line, and a vertical guide opening 31 is arranged on the outer wall of the ventilation pipe 5, and the other end of the second rotating shaft 29 passes through the guide opening 31 and extends into the ventilation pipe 5, and is connected to a cylinder 32, and the cylinder 32 is provided with a plurality of fan blades 33 along the circumferential direction.

[0040] The working principle and beneficial technical effects of the above technical solution are as follows: the motor 20 is started, and the output shaft of the motor 20 drives the first gear 21 to rotate clockwise, and the first gear 21 is meshed with the second gear 28 to drive the second gear 28 to rotate. When the first gear 21 rotates clockwise, a leftward force is applied to the first rotating shaft 27 of the second gear 28, and the first rotating shaft 27 applies a leftward force to the first slider 24. Since the first slider 24 cannot move to the left, at this time, the axis of the first gear 21, the axis of the second gear 28, and the axis of the third gear 30 are in a straight line. Through the meshing between the gears, the second gear 28 drives the third gear 30 and the second rotating shaft 29 to rotate clockwise, and the second rotating shaft 29 drives the cylinder 32 and the fan blades 33 clockwise. The needle rotates, so that the ventilation pipe 5 is in a negative pressure state near the outlet end, so that the air in the laboratory is discharged; when the first gear 21 rotates counterclockwise, it will apply a rightward force to the first rotating shaft 27 of the second gear 28, and the first slider 24 can move to the right along the first slide groove 23 and squeeze the tube-shaped spring 52, so that the first rotating shaft 27 and the second gear 28 move to the right, and the first gear 21 and the second gear 28 are disengaged and cannot provide power, and the fan blades 33 will stop rotating, thereby preventing the direction of rotation of the motor 20, resulting in backflow of air. When the first gear 21 rotates clockwise, under the elastic force of the tube-shaped spring 52, the second gear 28 will return to its initial position, driving the fan blades 33 to rotate to achieve a negative pressure state for ventilation.

[0041] In one embodiment, Figure 8-9 As shown, it also includes a cleaning device, which includes: a second slider 35, an eccentric block 38, an ultraviolet lamp 39, and a brush 40.

[0042] The left and right sides of the inner wall of the box body 18 are respectively provided with second slide grooves 34, and the two sides of the square platform 19 are respectively provided with second sliders 35, and the second sliders 35 can reciprocate up and down in the second slide grooves 34. The top of the square platform 19 is provided with a first spring 36, one end of the first spring 36 is connected to the top of the square platform 19, and the other end of the first spring 36 is connected to the top of the inner wall of the box body 18. The bottom end of the square platform 19 is provided with a second spring 37, one end of the second spring 37 is connected to the bottom end of the square platform 19, and the other end of the second spring 37 is connected to the bottom of the inner wall of the box body 18;

[0043] An eccentric block 38 is provided on the second rotating shaft 29, and the eccentric block 38 is located in the cylinder 32. Ultraviolet lamps 39 are respectively provided above and below the cylinder 32, and the ultraviolet lamps 39 are installed on the inner wall of the ventilation pipe 5. Bristles 40 are provided on the end of the fan blade 33 away from the cylinder 32.

[0044] The working principle and beneficial technical effects of the above technical solution: when the fan blade 33 rotates for ventilation, due to the presence of the eccentric block 38 in the cylinder 32, an eccentric force is generated, and the first spring 36 and the second spring 37 make the square table 19 in an elastically supported state. Under the action of the eccentric force, the square table 19 will reciprocate up and down, and the second slider 35 is stuck in the second slide groove 34, so that the square table 19 cannot move left and right and forward and backward. The square table 19 moves up and down more smoothly. The square table 19 reciprocates up and down, which correspondingly drives the fan blade 33 to reciprocate up and down, and increases the rotation speed of the fan blade 33. When the eccentric force generated by the eccentric block 38 is large enough, the fan blade 33 moves upward, and the bristles 40 on the fan blade 33 can contact the ultraviolet lamp, and at the same time drive the bristles 4 to rotate, and the bristles 4 clean the ultraviolet lamp. If the ultraviolet lamp does not need to be cleaned, the rotation speed of the fan blade 33 does not exceed the set value, and the bristles 4 will not contact the ultraviolet lamp 39. At this time, the fan blade 33 will only achieve ventilation, and the cleaning device is more intelligent. The ultraviolet lamp 39 can sterilize the gas in the ventilation pipe 5 .

[0045] In one embodiment, Fig. 9 As shown, a shell 41 is provided on the outer wall of the square platform 19, the first gear 21, the second gear 28, and the third gear 30 are all located in the shell 41, an axial hole 42 is provided on the shell 41, and the second rotating shaft 29 passes through the axial hole 42, and a horizontal infusion tube 43 is provided below the shell 41, one end of the third connecting rod 44 is connected to the outer wall of the shell 41, and the other end of the third connecting rod 44 is connected to the infusion tube 43, and the infusion tube 43 and the third connecting rod 44 are perpendicular to each other. A liquid storage tank 45 and a pressure pump 46 are respectively provided on the outer walls of the box body 18, and cleaning liquid is provided in the liquid storage tank 45. One end of a connecting pipe 51 is connected to the liquid storage tank 45, and the other end of the connecting pipe 51 is connected to the input port of the pressure pump 46. The output port of the pressure pump 46 is connected to one end of a hose 47, and the other end of the hose 47 extends into the box body 18 and is connected to one end of an infusion tube 43. The other end of the infusion tube 43 passes through the guide port 31 and is connected to a nozzle 48, and the nozzle 48 faces the bristles 40.

[0046] The working principle and beneficial technical effects of the above technical solution are as follows: in order to improve the cleaning effect, the pressure pump 46 is started, and the cleaning liquid in the liquid storage tank 45 can be transported to the liquid infusion tube 43 through the hose 47, and sprayed onto the bristles 4 through the nozzle 48, and the ultraviolet lamp 39 is scrubbed by the bristles 4, thereby improving the cleaning efficiency. In addition, since the square table 19 can reciprocate up and down, it will drive the liquid infusion tube 43 and the nozzle 48 to reciprocate up and down, thereby expanding the spraying range in the ventilation pipe 5. At the same time, since the nozzle 48 can keep synchronous reciprocating up and down with the fan blades 33, the cleaning liquid sprayed by the nozzle 48 can be sprinkled by the fan blades 33 to the entire space, and blown onto the inner wall of the ventilation pipe 5 under the action of the wind, thereby cleaning a large area in the ventilation pipe 5.

[0047] In one embodiment, Fig. 9 As shown, a liquid inlet pipe 49 is disposed on the outer wall of the liquid storage box 45 , a sealing cover 50 is disposed on the liquid inlet pipe 49 , and the liquid inlet pipe 49 is threadedly connected to the sealing cover 50 .

[0048] The working principle and beneficial technical effects of the above technical solution are as follows: by opening the sealing cover 50 , new cleaning liquid can be added to the liquid storage tank 45 through the liquid inlet pipe 49 .

[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A negative pressure ward and biological laboratory ceiling system, characterized in that: include: A top plate (1) and a bottom plate (2), a fixing block (3) is arranged between the top plate (1) and the bottom plate (2), a mounting groove (4) is arranged on the fixing block (3), a ventilation pipe (5) passes through the mounting groove (4), one end of a first connecting rod (6) is connected to the top of the fixing block (3), the other end of the first connecting rod (6) is connected to a first connecting plate (7), the first connecting plate (7) is connected to the top plate (1) by screws, one end of a second connecting rod (8) is connected to the bottom of the fixing block (3), the other end of the second connecting rod (8) is connected to a second connecting plate (9), and the second connecting plate (9) is connected to the bottom plate (2) by screws; The ventilation pipe (5) is provided with a negative pressure ventilation device, and the negative pressure ventilation device comprises: a box body (18), a square table (19), a cylinder (32), The cross section of the ventilation pipe (5) is rectangular, a box body (18) is arranged on the outer wall of the ventilation pipe (5), a square platform (19) is arranged inside the box body (18), a motor (20) is arranged on the square platform (19), and an output shaft of the motor (20) is arranged in a horizontal direction and connected to a first gear (21); A fixing plate (22) is arranged below the motor (20), the fixing plate (22) being fixedly connected to the outer wall of the square platform (19), the fixing plate (22) being arranged with a first slide groove (23) extending in the length direction, a first slider (24) being arranged in the first slide groove (23), the first slider (24) being capable of reciprocating along the first slide groove (23), a tubular spring (52) being arranged in the first slide groove (23), one end of the tubular spring (52) being connected to the right end of the first slider (24), and a first slider (24) being arranged in the first slide groove (23). The other end of the tubular spring (52) is connected to the inner wall of the first slide groove (23); the inner wall of the first slide groove (23) is provided with a slot (25) extending in the length direction; a block (26) is provided on the side wall of the first slider (24); the block (26) is located in the slot (25); the first slider (24) is provided with a first rotating shaft (27); one end of the first rotating shaft (27) is rotatably connected to the first slider (24); the other end of the first rotating shaft (27) is provided with a second gear (28); the first gear (21) is meshed with the second gear (28); A second rotating shaft (29) is provided below the first rotating shaft (27), one end of the second rotating shaft (29) is rotatably connected to the outer wall of the square platform (19), a third gear (30) is provided on the second rotating shaft (29), the third gear (30) is meshed with the second gear (28), the axis of the first gear (21), the axis of the second gear (28), and the axis of the third gear (30) are on the same straight line, a vertical guide opening (31) is provided on the outer wall of the ventilation pipe (5), the other end of the second rotating shaft (29) passes through the guide opening (31) and extends into the ventilation pipe (5), and is connected to a cylinder (32), and the cylinder (32) is provided with a plurality of fan blades (33) along the circumferential direction; The fixing block (3) is provided with a first through hole (10), and the water inlet pipe (11) passes through the first through hole (10).

2. A negative pressure ward and biological laboratory ceiling system according to claim 1, characterized in that: The fixing block (3) is provided with a second through hole (12), and the drainage pipe (13) passes through the second through hole (12).

3. A negative pressure ward and biological laboratory ceiling system according to claim 1, characterized in that: The fixing block (3) is provided with a third through hole (14), and the wire tube (15) passes through the third through hole (14).

4. A negative pressure ward and biological laboratory ceiling system according to claim 1, characterized in that: The fixing block (3) is provided with a fourth through hole (16), and the fresh air duct (17) passes through the fourth through hole (16).

5. A negative pressure ward and biological laboratory ceiling system according to claim 1, characterized in that: The cleaning device also includes a cleaning device, which includes: a second sliding block (35), an eccentric block (38), an ultraviolet lamp (39), and bristles (40). A second slide groove (34) is provided on the left and right sides of the inner wall of the box body (18), and a second slider (35) is provided on the two sides of the square platform (19), and the second slider (35) can reciprocate up and down in the second slide groove (34). A first spring (36) is provided at the top of the square platform (19), one end of the first spring (36) is connected to the top of the square platform (19), and the other end of the first spring (36) is connected to the top of the inner wall of the box body (18). A second spring (37) is provided at the bottom of the square platform (19), one end of the second spring (37) is connected to the bottom of the square platform (19), and the other end of the second spring (37) is connected to the bottom of the inner wall of the box body (18); An eccentric block (38) is arranged on the second rotating shaft (29), and the eccentric block (38) is located inside the cylinder (32). Ultraviolet lamps (39) are arranged above and below the cylinder (32), respectively, and the ultraviolet lamps (39) are mounted on the inner wall of the ventilation pipe (5). Bristles (40) are arranged on one end of the fan blade (33) away from the cylinder (32).

6. A negative pressure ward and biological laboratory ceiling system according to claim 5, characterized in that: A shell (41) is provided on the outer wall of the square platform (19); the first gear (21), the second gear (28), and the third gear (30) are all located in the shell (41); an axial hole (42) is provided on the shell (41); the second rotating shaft (29) passes through the axial hole (42); a horizontal infusion tube (43) is provided below the shell (41); one end of a third connecting rod (44) is connected to the outer wall of the shell (41); the other end of the third connecting rod (44) is connected to the infusion tube (43); the infusion tube (43) is connected to the third connecting rod (44); The rod (44) is perpendicular to the housing (18). A liquid storage tank (45) and a pressure pump (46) are respectively arranged on the outer wall of the housing (18). One end of a connecting pipe (51) is connected to the liquid storage tank (45). The other end of the connecting pipe (51) is connected to the input port of the pressure pump (46). The output port of the pressure pump (46) is connected to one end of a hose (47). The other end of the hose (47) extends into the housing (18) and is connected to one end of a liquid infusion tube (43). The other end of the liquid infusion tube (43) passes through the guide port (31) and is connected to a nozzle (48). The nozzle (48) faces the bristles (40).

7. A negative pressure ward and biological laboratory ceiling system according to claim 6, characterized in that: A liquid inlet pipe (49) is provided on the outer wall of the liquid storage box (45).

8. A negative pressure ward and biological laboratory ceiling system according to claim 7, characterized in that: A sealing cover (50) is provided on the liquid inlet pipe (49), and the liquid inlet pipe (49) is threadedly connected to the sealing cover (50).

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