All fresh air unit for positive control laboratory

Abstract

The invention discloses a full fresh air unit for a positive control laboratory, and relates to the technical field of fresh air units. Comprising a case, a self-cleaning filtering device, a first electric fan, a second electric fan, a condenser, an evaporator, a sterilization disinfector, a compressor and a filter, the first electric fan is used for driving a two-stage pressurization assembly to rotate reversely, air flows into a pressurization cavity, and the air is compressed in the pressurization cavity and guided into a filter screen piece through an air spraying pipe; the high-pressure gas mixed water mist flushes the filter screen sheet from inside to outside, so that dust on the filter screen sheet becomes clean under the impact and washing of the high-pressure gas-liquid mixture; the whole filter screen assembly is driven to rotate on the conical shell by utilizing a transmission plate on the two-stage pressurizing assembly, part of attached dust is thrown out under the action of centrifugal force, and then cleaning water on the dust is centrifugally spin-dried, so that the aims of cleaning the filter screen and centrifugally spin-drying are fulfilled. And dust in the sewage is filtered by using the annular filter screen, so that the purposes of filtering and recycling the cleaning sewage are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air units, and specifically to a new fresh air unit for a positive control laboratory. Background Art

[0002] A positive control laboratory is a laboratory used to set up positive controls in scientific experiments and research. A positive control is a sample known to produce an expected result, used to verify the feasibility and effectiveness of an experimental method. In a positive control laboratory, experiments are usually carried out using conditions known to produce specific experimental results or phenomena to ensure the correctness of the experimental process and the reliability of the experimental results. As a key place for high-risk experiments such as live bacteria operations, a positive control laboratory has strict requirements for a new fresh air unit, which can remove pollutants such as microorganisms and dust in the air and provide high-quality air for the laboratory. This is crucial for maintaining the stability of experimental materials and the accuracy of experimental results.

[0003] After long-term use of the current new fresh air unit, due to the blockage of the filter screen, the internal air flow will slow down and the air outlet efficiency will decrease. Especially at the fresh air inlet connected to the external air, when the external environment is poor, the filter screen assembly at the fresh air inlet will become blocked faster. The traditional solution often involves manually disassembling the filter screen for cleaning or replacement, which requires users to invite professional staff to come for maintenance, extremely inconvenient. Summary of the Invention

[0004] The purpose of the present invention is to provide a new fresh air unit for a positive control laboratory to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A new fresh air unit for a positive control laboratory, including a chassis, a condenser and an evaporator are installed in the chassis, a sterilizer and a compressor are installed in the chassis, a self-cleaning filter device is installed in the chassis, a first electric fan and a second electric fan are installed in the chassis, the first electric fan and the self-cleaning filter device are meshed and driven, and a filter is installed in the chassis; the self-cleaning filter device includes a cleaning housing and a spray washing assembly, the cleaning housing is installed on the chassis, a filter screen assembly is rotatably installed in the cleaning housing, a secondary pressurization assembly is rotatably installed on the cleaning housing, the spray washing assembly is installed on the cleaning housing, the spray washing assembly penetrates the filter screen assembly, and the spray washing assembly is rotatably connected to the filter screen assembly.

[0006] A control system is integrated in the chassis, and the control system is used to control the entire new fresh air unit.

[0007] The control system turns on the first electric fan and the second electric fan. The first electric fan and the second electric fan rotate forward. The rotation of the first electric fan drives the external air to flow through the self-cleaning filter device from the fresh air inlet. After being filtered by the self-cleaning filter device, the air enters the fresh air intake chamber. The air flows through the evaporator to the fresh air outlet chamber, and the sterilizer disinfects the air. The treated air flows out from the fresh air outlet. The second electric fan drives the indoor air to flow into the return air intake chamber from the return air inlet. The filter filters the passing air. The air flows through the condenser into the return air outlet chamber and then is discharged from the return air outlet. The condenser, evaporator and compressor cooperate with each other to intelligently control the air temperature, thus completing the air purification and temperature control in the laboratory.

[0008] Further, a cleaning chamber is formed between the cleaning housing and the filter assembly, and a pressurizing chamber is formed among the filter assembly, the secondary pressurizing assembly and the cleaning housing.

[0009] Further, a transmission column is installed at the bottom end of the first electric fan. A first inclined surface is provided on the transmission column, and a first bevel gear is provided on the first inclined surface. A transmission rod is rotatably installed on the chassis. A first bevel gear is installed at one end of the transmission rod, and a second bevel gear is installed at the other end of the transmission rod. The transmission column is meshed and driven with the first bevel gear through the first bevel gear, and the second bevel gear is meshed and driven with the secondary pressurizing assembly.

[0010] Further, the cleaning housing includes a cleaning cylinder. A conical shell is installed at the bottom end of the cleaning cylinder. Exhaust holes are provided on the conical shell. An electromagnetic ring is installed at the top end of the conical shell. An annular filter screen is installed on the cleaning cylinder. A drain pipe is installed at the bottom end of the cleaning cylinder. The secondary pressurizing assembly is rotatably installed at the bottom end of the conical shell, and the filter assembly is rotatably installed at the top end of the conical shell.

[0011] The discharged sewage and dust enter the cleaning chamber and fall onto the annular filter screen under the action of gravity. The annular filter screen filters the dust in the sewage. The filtered water falls to the bottom of the cleaning cylinder, is discharged from the drain pipe, and is recycled, so as to achieve the purpose of filtering and recycling the cleaning sewage.

[0012] Further, the secondary pressurizing assembly includes a pressurizing ring. The pressurizing ring is rotatably installed at the bottom end of the conical shell. A transmission plate is installed on the pressurizing ring. Fan blades are provided on the pressurizing ring. A second inclined surface is provided on the pressurizing ring, and a second bevel gear is provided on the second inclined surface. The pressurizing ring is meshed and driven with the second bevel gear through the second bevel gear.

[0013] When air passes through the self-cleaning filter device, the air penetrates into the filter mesh from the cleaning chamber. The filter mesh filters the air, and the dust in the air is blocked by the filter mesh. The filtered air enters the pressurizing chamber. When the first electric fan rotates, it drives the first bevel gear to rotate through the transmission column. The first bevel gear drives the transmission rod to rotate, the transmission rod drives the second bevel gear to rotate, the second bevel gear drives the headphone pressurizing component to rotate, and the fan blades on the secondary pressurizing component rotate. The rotation of the fan blades drives the air filtered by the filter mesh to accelerate downward. The accelerated flow of the air inside the filter mesh reduces the air pressure inside the filter mesh, and the air outside the filter mesh accelerates into the filter mesh under the action of the air pressure difference, improving the filtration efficiency. And when the dust attached to the filter mesh increases, the dust on the filter mesh hinders the air flow, and the air flow rate decreases. Under the action of the secondary pressurizing component, the air inside the filter mesh accelerates, and a negative pressure is generated inside and outside the filter mesh to offset the resistance of the dust.

[0014] Further, the filter mesh assembly includes a filter mesh support and a bottom turntable. Filter meshes are installed on the filter mesh support. A telescopic rod is installed at the bottom end of the filter mesh support. The telescopic rod penetrates through the bottom turntable and is installed with a support piece. A telescopic spring is installed between the support piece and the bottom turntable. A flexible telescopic pipe is installed between the filter mesh support and the bottom turntable. The bottom turntable is rotatably installed at the top end of the conical shell. The flexible telescopic pipe is made of a flexible and telescopic material. The bottom turntable, the conical shell and the secondary pressurizing component form a pressurizing chamber.

[0015] During the locking process of the filter mesh support, the telescopic rod is synchronously driven to descend. When self-locking is completed, the telescopic rod extends into the secondary pressurizing component. At this time, the bottom of the telescopic rod is aligned with the transmission plate. When the first electric fan drives the secondary pressurizing component to rotate in the reverse direction, the transmission plate on the secondary pressurizing component pushes the telescopic rod to rotate together. The telescopic rod drives the entire filter mesh assembly to rotate on the conical shell. The control system activates the spray cleaning component. The high-pressure water supply device inputs high-pressure water flow into the spray rod, and the high-pressure water flow sprays out from the spray head to form a water mist. When the secondary pressurizing component rotates in the reverse direction, it drives the air in the fresh air intake chamber to flow upward into the pressurizing chamber. Since the first electric valve is closed, the air pressure in the pressurizing chamber rises. The control system activates the second electric valve, and the air enters the spray pipe from the exhaust hole under the action of the pressure. The spray pipe conducts the high-pressure gas into the filter mesh. The high-pressure gas is mixed with the water mist to wash the filter mesh from the inside to the outside, making the dust on the filter mesh clean under the impact and washing of the high-pressure gas-liquid mixture. At the same time, the rotating filter mesh, under the action of centrifugal force, first throws off some of the attached dust and then centrifugally dries the cleaning water on it, thus achieving the purpose of cleaning the filter mesh and centrifugal drying.

[0016] Further, a fixed hook is installed at the bottom end of the filter mesh support. A locking groove is provided on the bottom turntable. A sliding hole is provided on the bottom turntable. A first electric valve is provided at the bottom end of the bottom turntable. A locking mechanism is slidably installed in the locking groove. The telescopic rod is slidably connected to the bottom turntable through the sliding hole. The fixed hook corresponds to the locking mechanism in position.

[0017] A monitoring element is arranged in the bottom turntable. When the fixing hook is engaged with the locking device, the monitoring element will send an electrical signal to the control system.

[0018] When the filter is blocked on a large scale, the external air pressure of the filter assembly is greater than the internal air pressure. Under the action of the pressure difference, the filter assembly is pressurized and drives the rotating ring to slide downward along the spray rod. The filter bracket drives the fixed hook to descend. When the fixed hook descends to the height of the locking block, it squeezes the locking block. After the locking block is compressed, it retracts in the direction of the locking rod. When the fixed hook descends and slides over the locking block, the locking block rebounds under the elastic force of the self-locking spring, and the locking block resists the slot on the fixed hook so that the fixed hook cannot rebound, thereby realizing automatic locking of the filter assembly. After the control system determines that the filter assembly is locked through the monitoring element, it shuts down the entire fresh air unit, then turns on the first electric fan in reverse, and closes the first electric valve at the bottom of the bottom turntable.

[0019] When the filter is dried, the control system energizes the electromagnetic ring, which generates magnetic force to adsorb the adsorption block. The adsorption block drives the locking block to retract through the locking rod, so that the locking block is separated from the fixed hook. After the fixed hook loses its constraint, the filter bracket drives the filter to rebound and reset under the action of the spring. After that, the control system drives other components to reset, thereby realizing self-cleaning of the filter assembly.

[0020] Furthermore, the locking mechanism includes a locking rod, which is slidably mounted on the bottom turntable, with an adsorption block mounted on one end of the locking rod and a locking block mounted on the other end of the locking rod, a self-locking spring mounted between the locking block and the bottom turntable, and the adsorption block and the electromagnetic ring are located in the same plane.

[0021] Furthermore, the spray assembly includes a spray rod, an air jet pipe, a rotating ring and a connecting plate, the connecting plate is installed on the chassis, a high-pressure water supply device is installed on the connecting plate, the spray rod is installed at the bottom of the high-pressure water supply device, the spray rod is connected to the inside of the high-pressure water supply device, a plurality of spray heads are installed on the spray rod, a first hole and a second hole are respectively provided on the rotating ring, one end of the air jet pipe is connected to the first hole, the other end of the air jet pipe is connected to the pressurization chamber through the exhaust hole, a second electric valve is provided at the end of the air jet pipe connected to the exhaust hole, the spray rod is movably connected to the rotating ring through the second hole, and the rotating ring is rotatably installed on the top of the filter bracket.

[0022] The high-pressure water supply device is used to provide high-pressure water flow into the spray rod.

[0023] Furthermore, a fresh air inlet, a fresh air outlet, a return air inlet and a return air outlet are respectively provided at the top of the chassis, and a fresh air intake cabin, a fresh air outlet cabin, a return air intake cabin and a return air outlet cabin are respectively provided inside the chassis, a self-cleaning filter device is located at the top of the fresh air intake cabin, a first electric fan and a sterilizer are located in the fresh air outlet cabin, a filter and a compressor are located in the return air intake cabin, a second electric fan is located in the return air outlet cabin, an evaporator is provided between the fresh air intake cabin and the fresh air outlet cabin, and a condenser is provided between the return air intake cabin and the return air outlet cabin.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The first electric fan is used to drive the secondary boost component to rotate. The fan blades on the secondary boost component rotate to drive the air to pass downward at an accelerated speed, so that the air pressure inside the filter is reduced. The air outside the filter is accelerated to flow into the filter under the action of the air pressure difference, thereby achieving the purpose of improving the air filtration efficiency. When the dust attached to the filter increases, the dust on the filter hinders the air circulation and the air flow rate decreases. Under the action of the secondary boost component, the negative pressure generated inside and outside the filter offsets the resistance of the dust, effectively avoiding the reduction of air filtration efficiency.

[0026] 2. Utilize the pressure difference generated when the filter is clogged to make the filter bracket automatically drive the fixed hook to descend, and the fixed hook squeezes the locking block. After the locking block is pressed, it retracts in the direction of the locking rod. When the fixed hook descends and slides over the locking block, the locking block rebounds under the elastic force of the self-locking spring, and the locking block presses against the slot on the fixed hook so that the fixed hook cannot rebound, thereby realizing the automatic locking of the filter assembly; then, by energizing the electromagnetic ring, the adsorption block is adsorbed, the locking block is separated from the fixed hook, and the filter bracket drives the filter to rebound and reset, thereby realizing the contact locking function.

[0027] 3. The first electric fan is used to drive the secondary boost assembly to rotate in the opposite direction, so that the air flows into the boost chamber. The air is compressed in the boost chamber and introduced into the filter mesh through the jet pipe. The high-pressure gas mixed with water mist washes the filter mesh from the inside out, so that the dust on the filter mesh becomes clean under the impact and washing of the high-pressure gas-liquid mixture; the transmission plate on the secondary boost assembly is used to drive the entire filter assembly to rotate on the conical shell. Under the action of centrifugal force, the rotating filter mesh first throws out part of the attached dust, and then centrifuges the clean water on it to dry it, thereby achieving the purpose of filter cleaning and centrifugal drying.

[0028] 4. Use an annular filter to filter the dust in the sewage. The filtered water falls into the bottom of the cleaning cylinder and is discharged and collected, thereby achieving the purpose of filtering and recycling the cleaning sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1Is the overall three-dimensional view of the brand-new wind turbine unit of the present invention;

[0030] Figure 2 Is the three-dimensional view of the brand-new wind turbine unit of the present invention;

[0031] Figure 3 Is the three-dimensional view of the self-cleaning filtration device and the first electric fan of the present invention;

[0032] Figure 4 Is the three-dimensional view of the cleaning outer shell of the present invention;

[0033] Figure 5 Is the three-dimensional view of the spray-washing assembly of the present invention;

[0034] Figure 6 Is the three-dimensional view of the filter screen assembly and the secondary pressurization assembly of the present invention;

[0035] Figure 7 Is the three-dimensional view of the bottom turntable of the present invention;

[0036] Figure 8 Is of the present invention Figure 7 Partial enlarged view of area A.

[0037] In the figure: 1, chassis; 2, self-cleaning filtration device; 3, first electric fan; 4, second electric fan; 5, condenser; 6, evaporator; 7, sterilizer; 8, compressor; 9, filter; 11, fresh air inlet; 12, fresh air outlet; 13, return air inlet; 14, return air outlet; 15, fresh air intake chamber; 16, fresh air outlet chamber; 17, return air intake chamber; 18, return air outlet chamber; 21, cleaning outer shell; 22, spray-washing assembly; 23, filter screen assembly; 24, secondary pressurization assembly; 25, pressurization chamber; 26, cleaning chamber; 31, transmission column; 32, transmission rod; 33, first bevel gear; 34, first inclined surface; 35, second bevel gear; 211, annular filter screen; 212, drain pipe; 213, cleaning cylinder; 214, exhaust hole; 215, electromagnetic ring; 216, conical shell; 221, high-pressure water supply device; 222, connecting plate; 223, air spraying pipe; 224, spraying rod; 225, spraying head; 226, rotating ring; 2261, first hole; 2262, second hole; 231, filter screen support; 232, filter screen sheet; 233, flexible telescopic pipe; 234, telescopic rod; 235, locking mechanism; 236, bottom turntable; 237, telescopic spring; 238, supporting piece; 239, fixing hook; 241, fan blade; 242, transmission plate; 243, second inclined surface; 244, pressurization ring; 2361, sliding hole; 2362, locking groove; 2351, locking block; 2352, adsorption block; 2353, locking rod; 2354, self-locking spring. Detailed implementation mode

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] As Figures 1-8 shown, the present invention provides a new fan unit technical solution for a positive control laboratory: including a chassis 1, a condenser 5 and an evaporator 6 are installed in the chassis 1, a sterilizer 7 and a compressor 8 are installed in the chassis 1, a self-cleaning filter device 2 is installed in the chassis 1, a first electric fan 3 and a second electric fan 4 are installed in the chassis 1, the first electric fan 3 is meshed and driven with the self-cleaning filter device 2, and a filter 9 is installed in the chassis 1; the self-cleaning filter device 2 includes a cleaning housing 21 and a spraying component 22, the cleaning housing 21 is installed on the chassis 1, a filter screen component 23 is rotatably installed in the cleaning housing 21, a secondary pressurizing component 24 is rotatably installed on the cleaning housing 21, the spraying component 22 is installed on the cleaning housing 21, the spraying component 22 penetrates through the filter screen component 23, and the spraying component 22 is rotatably connected to the filter screen component 23. A control system is integrated in the chassis 1, and the control system is used to control the entire new fan unit.

[0040] A cleaning chamber 26 is formed between the cleaning housing 21 and the filter screen component 23, and a pressurizing chamber 25 is formed among the filter screen component 23, the secondary pressurizing component 24 and the cleaning housing 21.

[0041] A transmission column 31 is installed at the bottom end of the first electric fan 3, a first inclined surface 34 is provided on the transmission column 31, a first bevel gear is provided on the first inclined surface 34, a transmission rod 32 is rotatably installed on the chassis 1, a first bevel gear 33 is installed at one end of the transmission rod 32, a second bevel gear 35 is installed at the other end of the transmission rod 32, the transmission column 31 is meshed and driven with the first bevel gear 33 through the first bevel gear, and the second bevel gear 35 is meshed and driven with the secondary pressurizing component 24.

[0042] The secondary pressurizing component 24 includes a pressurizing ring 244, the pressurizing ring 244 is rotatably installed at the bottom end of the conical shell 216, a transmission plate 242 is installed on the pressurizing ring 244, fan blades 241 are provided on the pressurizing ring 244, a second inclined surface 243 is provided on the pressurizing ring 244, a second bevel gear is provided on the second inclined surface 243, and the pressurizing ring 244 is meshed and driven with the second bevel gear 35 through the second bevel gear.

[0043] A fixing hook 239 is installed at the bottom end of the filter screen support 231. A locking groove 2362 is provided on the bottom turntable 236. A sliding hole 2361 is provided on the bottom turntable 236. A first electric valve is provided at the bottom end of the bottom turntable 236. A locking mechanism 235 is slidably installed in the locking groove 2362. The telescopic rod 234 is slidably connected to the bottom turntable 236 through the sliding hole 2361. The fixing hook 239 corresponds to the position of the locking mechanism 235.

[0044] A monitoring element is provided inside the bottom turntable 236. When the fixing hook 239 is engaged with the locking device, the monitoring element will send an electrical signal to the control system.

[0045] The filter screen assembly 23 includes a filter screen support 231 and a bottom turntable 236. A filter screen 232 is installed on the filter screen support 231. A telescopic rod 234 is installed at the bottom end of the filter screen support 231. The telescopic rod 234 passes through the bottom turntable 236 and is installed with a supporting piece 238. A telescopic spring 237 is installed between the supporting piece 238 and the bottom turntable 236. A flexible telescopic tube 233 is installed between the filter screen support 231 and the bottom turntable 236. The bottom turntable 236 is rotatably installed at the top end of the conical shell 216. The flexible telescopic tube 233 is made of a flexible and telescopic material. The bottom turntable 236, the conical shell 216 and the secondary pressurization assembly 24 form a pressurization chamber 25.

[0046] The cleaning housing 21 includes a cleaning cylinder 213. A conical shell 216 is installed at the bottom end of the cleaning cylinder 213. An exhaust hole 214 is provided on the conical shell 216. An electromagnetic ring 215 is installed at the top end of the conical shell 216. An annular filter screen 211 is installed on the cleaning cylinder 213. A drain pipe 212 is installed at the bottom end of the cleaning cylinder 213. A secondary pressurization assembly 24 is rotatably installed at the bottom end of the conical shell 216. A filter screen assembly 23 is rotatably installed at the top end of the conical shell 216.

[0047] The locking mechanism 235 includes a locking rod 2353. The locking rod 2353 is slidably installed on the bottom turntable 236. An adsorption block 2352 is installed at one end of the locking rod 2353. A lock block 2351 is installed at the other end of the locking rod 2353. A self-locking spring 2354 is installed between the lock block 2351 and the bottom turntable 236. The adsorption block 2352 and the electromagnetic ring 215 are located in the same plane.

[0048] The spray cleaning assembly 22 includes a spray rod 224, an air spray pipe 223, a rotating ring 226, and a connecting plate 222. The connecting plate 222 is installed on the chassis 1. A high-pressure water supply device 221 is installed on the connecting plate 222. The spray rod 224 is installed at the bottom end of the high-pressure water supply device 221. The spray rod 224 is internally connected to the high-pressure water supply device 221. A number of spray heads 225 are installed on the spray rod 224. The rotating ring 226 is respectively provided with a first hole 2261 and a second hole 2262. One end of the air spray pipe 223 is connected to the first hole 2261. The other end of the air spray pipe 223 is connected to the pressurizing chamber 25 through the exhaust hole 214. A second electric valve is provided at the end of the air spray pipe 223 connected to the exhaust hole 214. The spray rod 224 is movably connected to the rotating ring 226 through the second hole 2262. The rotating ring 226 is rotatably installed at the top end of the filter support 231.

[0049] The high-pressure water supply device 221 is used to supply high-pressure water flow into the spray rod 224.

[0050] A fresh air inlet 11, a fresh air outlet 12, a return air inlet 13, and a return air outlet 14 are respectively provided at the top end of the chassis 1. A fresh air intake chamber 15, a fresh air outlet chamber 16, a return air intake chamber 17, and a return air outlet chamber 18 are respectively provided inside the chassis 1. The self-cleaning filter device 2 is located at the top end of the fresh air intake chamber 15. The first electric fan 3 and the sterilizer 7 are located inside the fresh air outlet chamber 16. The filter 9 and the compressor 8 are located inside the return air intake chamber 17. The second electric fan 4 is located inside the return air outlet chamber 18. An evaporator 6 is provided between the fresh air intake chamber 15 and the fresh air outlet chamber 16. A condenser 5 is provided between the return air intake chamber 17 and the return air outlet chamber 18.

[0051] The working principle of the present invention: The control system turns on the first electric fan 3 and the second electric fan 4. The first electric fan 3 and the second electric fan 4 rotate forward. The rotation of the first electric fan 3 drives the external air to flow through the self-cleaning filter device 2 from the fresh air inlet 11. After being filtered by the self-cleaning filter device 2, the air enters the fresh air intake chamber 15. The air flows to the fresh air outlet through the evaporator 6. The sterilizer 7 disinfects the air. The treated air flows out from the fresh air outlet 12. The second electric fan 4 drives the indoor air to flow into the return air intake chamber 17 from the return air inlet 13. The filter 9 filters the passing air. The air flows into the return air outlet chamber 18 through the condenser 5 and then is discharged from the return air outlet 14. The condenser 5, the evaporator 6, and the compressor 8 cooperate with each other to intelligently control the air temperature, thereby completing the air purification and temperature control in the laboratory.

[0052] When the air passes through the self-cleaning filter device 2, the air passes through the clean chamber 26 into the filter sheet 232, the filter sheet 232 filters the air, and the dust in the air is blocked by the filter sheet 232. The filtered air enters the boost chamber 25, and the first electric fan 3 rotates through the transmission column 31 to drive the first bevel gear 33 to rotate, the first bevel gear 33 drives the transmission rod 32 to rotate, the transmission rod 32 drives the second bevel gear 35 to rotate, the second bevel gear 35 drives the earphone boost assembly to rotate, and the fan blade 241 on the secondary boost assembly 24 rotates, and the fan blade 241 rotates with The air filtered by the filter 232 is accelerated to pass downward, and the airflow inside the filter 232 is accelerated to flow, so that the air pressure inside the filter 232 is reduced. The air outside the filter 232 is accelerated to flow into the filter 232 under the action of the air pressure difference, thereby improving the filtration efficiency. When the dust attached to the filter 232 increases, the dust on the filter 232 hinders the air circulation, and the air flow rate decreases. Under the action of the secondary boost component 24, the air inside the filter 232 is accelerated to flow, and negative pressure is generated inside and outside the filter 232 to offset the resistance of the dust.

[0053] When the filter sheet 232 is blocked over a large area, the external air pressure of the filter assembly 23 is greater than the internal air pressure. Under the action of the pressure difference, the filter assembly 23 is pressurized and drives the rotating ring 226 to slide downward along the spray rod 224, and the filter bracket 231 drives the fixing hook 239 to descend. When the fixing hook 239 descends to the height of the locking block 2351, the locking block 2351 is squeezed. After the locking block 2351 is pressurized, it retracts in the direction of the locking rod 2353. When the fixing hook 239 descends and slides over the locking block 2351, the locking block 2351 rebounds under the elastic force of the self-locking spring 2354, and the locking block 2351 resists the card slot on the fixing hook 239 so that the fixing hook 239 cannot rebound, thereby realizing automatic locking of the filter assembly 23. After the control system determines through the monitoring element that the filter assembly 23 is locked, it turns off the entire fresh air unit, then turns on the first electric fan in the reverse direction, and closes the first electric valve at the bottom of the bottom turntable 236.

[0054] During the locking process of the filter screen support 231, the telescopic rod 234 is synchronously driven to descend. When self-locking is completed, the telescopic rod 234 extends into the secondary pressurization assembly 24. At this time, the bottom of the telescopic rod 234 is aligned with the transmission plate 242. When the first electric fan 3 drives the secondary pressurization assembly 24 to rotate in the reverse direction, the transmission plate 242 on the secondary pressurization assembly 24 pushes the telescopic rod 234 to rotate together. The telescopic rod 234 drives the entire filter screen assembly 23 to rotate on the conical shell 216. The control system activates the spray cleaning assembly 22, and the high-pressure water supply device 221 inputs high-pressure water flow into the spray rod 224. The high-pressure water flow sprays out from the spray head 225 to form a water mist. When the secondary pressurization assembly 24 rotates in the reverse direction, it drives the air in the fresh air intake chamber 15 to flow upward into the pressurization chamber 25. Since the first electric valve is closed, the air pressure in the pressurization chamber 25 rises. The control system activates the second electric valve, and the air enters the spray pipe 223 from the exhaust hole 214 under the action of pressure. The spray pipe 223 guides the high-pressure gas into the interior of the filter screen 232. The high-pressure gas mixes with the water mist and flushes the filter screen 232 from the inside to the outside, making the dust on the filter screen 232 clean under the impact and washing of the high-pressure gas-liquid mixture. At the same time, the rotating filter screen 232 under the action of centrifugal force first throws out some of the attached dust and then centrifugally dries the clean water on it, thus achieving the purpose of filter screen cleaning and centrifugal drying.

[0055] The discharged sewage and dust enter the cleaning chamber 26 and fall onto the annular filter screen 211 under the action of gravity. The annular filter screen 211 filters the dust in the sewage, and the filtered water falls to the bottom of the cleaning cylinder 213 and is discharged from the drain pipe 212 for recycling, thus achieving the purpose of filtering and recycling the cleaning sewage.

[0056] When the filter screen 232 is dried, the control system energizes the electromagnetic ring 215. After the electromagnetic ring 215 is energized, it generates a magnetic force to adsorb the adsorption block 2352. The adsorption block 2352 drives the lock block 2351 to retract through the locking rod 2353, so that the lock block 2351 is disengaged from the fixed hook 239. After the fixed hook 239 loses its restraint, under the action of the spring, the filter screen support 231 drives the filter screen 232 to rebound and reset. Then, the control system drives other components to reset, thus realizing the self-cleaning of the filter screen assembly 23.

[0057] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A brand-new air handling unit for a positive control laboratory, characterized in that: The described new fan unit includes a chassis (1), a condenser (5) and an evaporator (6) are installed inside the chassis (1), a sterilizer (7) and a compressor (8) are installed inside the chassis (1), a self-cleaning filter device (2) is installed inside the chassis (1), a first electric fan (3) and a second electric fan (4) are installed inside the chassis (1), the first electric fan (3) and the self-cleaning filter device (2) are meshed and driven, and a filter (9) is installed inside the chassis (1); the self-cleaning filter device (2) includes a cleaning housing (21) and a spray washing assembly (22), the cleaning housing (21) is installed on the chassis (1), a filter screen assembly (23) is rotatably installed inside the cleaning housing (21), a secondary pressurizing assembly (24) is rotatably installed on the cleaning housing (21), the spray washing assembly (22) is installed on the cleaning housing (21), the spray washing assembly (22) penetrates through the filter screen assembly (23), and the spray washing assembly (22) is rotatably connected to the filter screen assembly (23).

2. The new air blower unit for a positive control laboratory according to claim 1, characterized in that: A cleaning chamber (26) is formed between the cleaning housing (21) and the filter screen assembly (23), and a pressurizing chamber (25) is formed among the filter screen assembly (23), the secondary pressurizing assembly (24) and the cleaning housing (21).

3. The new fan unit for a positive control laboratory according to claim 2, characterized in that: A transmission column (31) is installed at the bottom end of the first electric fan (3), a first inclined surface (34) is provided on the transmission column (31), a first bevel gear is provided on the first inclined surface (34), a transmission rod (32) is rotatably installed on the chassis (1), a first bevel gear (33) is installed at one end of the transmission rod (32), a second bevel gear (35) is installed at the other end of the transmission rod (32), the transmission column (31) is meshed and driven with the first bevel gear (33) through the first bevel gear, and the second bevel gear (35) is meshed and driven with the secondary pressurizing assembly (24).

4. A novel air blower unit for a positive control laboratory according to claim 3, characterized in that: The cleaning housing (21) includes a cleaning cylinder (213), a conical shell (216) is installed at the bottom end of the cleaning cylinder (213), exhaust holes (214) are provided on the conical shell (216), an electromagnetic ring (215) is installed at the top end of the conical shell (216), an annular filter screen (211) is installed on the cleaning cylinder (213), a drain pipe (212) is installed at the bottom end of the cleaning cylinder (213), the secondary pressurizing assembly (24) is rotatably installed at the bottom end of the conical shell (216), and the filter screen assembly (23) is rotatably installed at the top end of the conical shell (216).

5. A new air handling unit for a positive control laboratory according to claim 4, characterized in that: The secondary pressurizing assembly (24) includes a pressurizing ring (244), the pressurizing ring (244) is rotatably installed at the bottom end of the conical shell (216), a transmission plate (242) is installed on the pressurizing ring (244), fan blades (241) are provided on the pressurizing ring (244), a second inclined surface (243) is provided on the pressurizing ring (244), a second bevel gear is provided on the second inclined surface (243), and the pressurizing ring (244) is meshed and driven with the second bevel gear (35) through the second bevel gear.

6. The new air blower unit for a positive control laboratory according to claim 5, characterized in that: The filter screen assembly (23) includes a filter screen support (231) and a bottom turntable (236). A filter screen sheet (232) is installed on the filter screen support (231). An expansion rod (234) is installed at the bottom end of the filter screen support (231). The expansion rod (234) penetrates through the bottom turntable (236) and is installed with a supporting piece (238). A telescopic spring (237) is installed between the supporting piece (238) and the bottom turntable (236). A flexible telescopic pipe (233) is installed between the filter screen support (231) and the bottom turntable (236). The bottom turntable (236) is rotatably installed at the top end of the conical shell (216). The flexible telescopic pipe (233) is made of a flexible and telescopic material. The bottom turntable (236), the conical shell (216) and the secondary pressurization assembly (24) form a pressurization chamber (25).

7. A novel air handling unit for a positive control laboratory according to claim 6, characterized in that: A fixed hook (239) is installed at the bottom end of the filter screen support (231). A locking groove (2362) is provided on the bottom turntable (236). A sliding hole (2361) is provided on the bottom turntable (236). A first electric valve is provided at the bottom end of the bottom turntable (236). A locking mechanism (235) is slidably installed in the locking groove (2362). The expansion rod (234) is slidably connected to the bottom turntable (236) through the sliding hole (2361). The fixed hook (239) corresponds to the position of the locking mechanism (235).

8. A novel air handling unit for a positive control laboratory according to claim 7, characterized in that: The locking mechanism (235) includes a locking rod (2353). The locking rod (2353) is slidably installed on the bottom turntable (236). An adsorption block (2352) is installed at one end of the locking rod (2353). A locking block (2351) is installed at the other end of the locking rod (2353). A self-locking spring (2354) is installed between the locking block (2351) and the bottom turntable (236). The adsorption block (2352) and the electromagnetic ring (215) are in the same plane.

9. The new air blower unit for a positive control laboratory according to claim 6, characterized in that: The spray washing assembly (22) includes a spray rod (224), a spray air pipe (223), a rotating ring (226) and a connecting plate (222). The connecting plate (222) is installed on the machine case (1). A high-pressure water supply device (221) is installed on the connecting plate (222). The spray rod (224) is installed at the bottom end of the high-pressure water supply device (221). The spray rod (224) is internally connected to the high-pressure water supply device (221). A number of spray heads (225) are installed on the spray rod (224). The rotating ring (226) is respectively provided with a first hole (2261) and a second hole (2262). One end of the spray air pipe (223) is connected to the first hole (2261). The other end of the spray air pipe (223) is communicated with the pressurization chamber (25) through an exhaust hole (214). A second electric valve is provided at the end of the spray air pipe (223) connected to the exhaust hole (214). The spray rod (224) is movably connected to the rotating ring (226) through the second hole (2262). The rotating ring (226) is rotatably installed at the top end of the filter screen support (231).

10. A novel air blower unit for a positive control laboratory according to claim 1, characterized in that: The top of the chassis (1) is respectively provided with a fresh air inlet (11), a fresh air outlet (12), a return air inlet (13) and a return air outlet (14). Inside the chassis (1), there are respectively provided a fresh air intake chamber (15), a fresh air outlet chamber (16), a return air intake chamber (17) and a return air outlet chamber (18). The self-cleaning filter device (2) is located at the top of the fresh air intake chamber (15). The first electric fan (3) and the sterilizer (7) are located inside the fresh air outlet chamber (16). The filter (9) and the compressor (8) are located inside the return air intake chamber (17). The second electric fan (4) is located inside the return air outlet chamber (18). An evaporator (6) is provided between the fresh air intake chamber (15) and the fresh air outlet chamber (16). A condenser (5) is provided between the return air intake chamber (17) and the return air outlet chamber (18).

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