Uniflow clean elevator car
Through the design of the clean roof module and the overhead bottom, combined with the flow adjustment and sealed door structure, the problems of insufficient cleanliness and inconvenient maintenance in the clean elevator car are solved, and a one-way flow clean elevator car with high cleanliness and convenient maintenance are achieved.
Patent Information
- Application Number
- CN202422156898.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The existing clean elevator car cannot form a one-way flow, resulting in insufficient cleanliness level and inconvenient maintenance.
It adopts a clean top module and an overhead bottom design, combined with a flow regulating valve and sealing door structure, forming a top-down, uniform one-way air flow, and achieving high cleanliness through return air circulation, simplifying maintenance and maintenance.
The cleanliness level is achieved to reach level 100 or above, and is convenient for maintenance and maintenance, prevent reverse pollution, and ensure high cleanliness of the car space.
Smart Images
Figure CN223047037U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clean elevators, in particular to a unidirectional flow clean elevator car. Background Art
[0002] When installing an elevator in a building with cleanliness class requirements, a clean elevator is usually required. The clean elevator provides a car space with a controlled concentration of airborne particles for transporting people or goods, and can reduce the pollution of the clean space during transportation to a certain extent.
[0003] Clean elevators usually adopt an air filtration unit (FFU) assembled on the car top to provide clean air for the car instead of a fan, and discharge the air through the car door gap, or through the air return opening arranged at the lower part of the car wall, and achieve the purpose of purifying the car space through air return circulation.
[0004] For the clean elevator car with an air filtration unit assembled on the car top, commercially available FFUs with limited specifications are usually adopted. However, the cross-sectional sizes of different cars are different, and lighting fixtures also need to be installed on the car top. Therefore, the full coverage rate of the filter on the car top is generally not high, and eddy currents will be formed below the area on the car top without filter coverage. At the same time, exhausting air through the car door gap or the air return opening at the lower part of the car wall will cause the air flow streamline to twist and turn in the middle and lower parts of the car, and form backflows and eddy currents at the car corners and the middle of the car bottom. In the backflow or eddy current area, suspended particles stay and cannot be discharged, affecting the cleanliness.
[0005] Therefore, the air flow pattern in the existing clean elevator car cannot form a unidirectional flow, and forming a unidirectional flow in the entire space cross-section is a necessary condition for creating a car with a cleanliness class of 100 or above. As a result, the existing clean elevators can only be applied to clean areas with a cleanliness class of 1000 or below, and are not suitable for high-grade clean areas with a cleanliness class of 100 or above.
[0006] In addition, the FFU of the existing clean elevator car is installed on the car top. When overhauling or replacing the filter, personnel need to enter the hoistway and climb onto the car top to lift the FFU for operation. Therefore, it can only be implemented by elevator installation and maintenance practitioners, and the overhaul and maintenance are very inconvenient. Summary of the Utility Model
[0007] The purpose of the utility model is to provide a unidirectional flow clean elevator car to solve the problems that the existing clean elevator car cannot generate unidirectional flow clean air and cannot create a car space with a high cleanliness class.
[0008] To achieve the above purpose, the utility model adopts the following technical scheme: A unidirectional flow clean elevator car, comprising:
[0009] A car body;
[0010] The clean car top module includes a primary air filter, a fan, a box body, a high-efficiency air filter and a car top plate. The box body is arranged on the top of the car body. At the bottom of the box body, there are arranged successively a high-efficiency air filter and a car top plate. At the top of the box body, there is a fan which is used to suck the air above the car top into the box body and form high-pressure air in the internal cavity of the box body. The primary air filter is arranged at the air suction inlet of the box body;
[0011] The overhead car bottom is arranged at the bottom of the car body. The overhead car bottom includes a car bottom plate, a car bottom frame and overhead supports. The car bottom plate is fixedly installed on the overhead supports. The car bottom plate is a hollowed-out plate body. The overhead supports are arranged inside the car bottom frame. The air passes through the car bottom plate and then enters the car bottom frame, and forms a static pressure area in the car bottom frame. The car bottom frame is connected to a return air duct through an air return opening on the side wall, and the return air duct communicates with the box body.
[0012] As a further description of the above technical solution:
[0013] A flow regulating valve is installed between the air return opening and the return air duct.
[0014] As a further description of the above technical solution:
[0015] The car body includes car wall plates, a door frame and a car door assembly. The car wall plates are arranged on the side of the car body. The door area of the car body is provided with a door frame, and the car door assembly is arranged at the door frame. The car door assembly includes a door machine, door panels and a door sill. The door machine is used to drive the door panels to slide open and close along the door sill.
[0016] As a further description of the above technical solution:
[0017] A clearance reducing strip is arranged between the door panel and the door frame.
[0018] As a further description of the above technical solution:
[0019] A clearance reducing plate is arranged at the bottom of the door panel, and a groove corresponding to the clearance reducing plate in position is arranged on the surface of the door sill. The clearance reducing plate extends into the groove.
[0020] As a further description of the above technical solution:
[0021] A "Z"-shaped rabbet structure is arranged between a pair of opposite door panels, and a rubber strip is arranged on the closing surface of the rabbet structure.
[0022] As a further description of the above technical solution:
[0023] Strip-shaped lamps are arranged inside the car body, and the strip-shaped lamps are arranged inside the right-angle sides of the car body.
[0024] As a further description of the above technical solution:
[0025] Arc strips are installed inside the right-angle sides of the car body.
[0026] As a further description of the above technical solution:
[0027] A circular airflow guide cover is arranged under the fan. The diameter of the airflow guide cover is larger than the diameter of the fan. The airflow guide cover is used to guide the airflow blown out by the fan to flow upward, and the airflow flows out into the box through the edge of the airflow guide cover.
[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0029] 1. In the utility model, the clean car top module uses a fan to filter the air outside the car through the primary air filter to remove the suspended particles and fibers with larger particle sizes, and then pumps it into the box to form relatively high-pressure air, and then passes through the high-efficiency air filter under the box to filter out the remaining harmful suspended particles to form clean air, and then passes through the car top plate into the car. The entire bottom surface of the clean car top module, except for the frame and the area where the door machine is installed, is used to lay the high-efficiency air filter, so that the clean air can evenly enter the car from almost the entire car top area.
[0030] 2. In the utility model, after the clean air enters the car, it is discharged into the overhead car bottom through the holes densely distributed on the entire car bottom plate, and then returns to the box of the clean car top module through the flow control valve and the return air duct respectively, and enters the car after being filtered again through the high-efficiency air filter, and the cycle continues. In the car, the clean air is sent in from the car top and discharged from the car bottom. The air flow streamlines in the horizontal cross section of the car are parallel to each other and basically maintain a straight line, achieving a one-way flow effect. If the interior of the car is polluted by suspended particles entering from the outside or dust particles are deposited on the car bottom after the elevator is stopped, they can also be quickly discharged from the car by the air flow.
[0031] 3. In the utility model, the gaps between the door panels and the door frames, and between the door panels and the door panels (in the case of multiple sliding doors) are reduced by gap reducing strips. The gaps between the door panels and the sill grooves are formed into a maze structure by gap reducing plates. The door panels are closed by a stop structure. Through the above-mentioned design for the door panels, the door gaps can be reduced or the resistance to airflow can be increased, thereby improving the airtightness of the car, increasing the positive pressure difference between the car and the shaft, and preventing reverse contamination. The air discharged into the overhead car bottom will first flow through the flow regulating valve before entering the return air duct. The flow regulating valve can adjust the air flow entering the return air duct, and then adjust the positive pressure difference inside the car relative to the outside of the car. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related accompanying drawings can be obtained based on these drawings without creative efforts.
[0033] Figure 1 It is a schematic structural diagram of a unidirectional flow clean elevator car.
[0034] Figure 2 It is a schematic structural diagram of a car body in a unidirectional flow clean elevator car.
[0035] Figure 3 It is a cross-sectional view of the clean car top module in a unidirectional flow clean elevator car from a side view angle.
[0036] Figure 4 It is a schematic structural diagram of the clean car top module in a unidirectional flow clean elevator car from a top view angle.
[0037] Figure 5 It is a schematic sectional view of the splicing of the car wall panels in a unidirectional flow clean elevator car.
[0038] Figure 6 It is Figure 9 The enlarged partial view at position B in
[0039] Figure 7 It is Figure 1 The enlarged partial view at position A in
[0040] Figure 8 It is Figure 9 The enlarged partial view at position C in
[0041] Figure 9 It is a developed schematic diagram of the car door assembly in a unidirectional flow clean elevator car.
[0042] Legend:
[0043] 1. Primary air filter; 2. Fan; 3. Box body; 4. High-efficiency air filter; 5. Car top plate; 6. Door machine; 7. Door panel; 8. Threshold; 9. Car floor; 10. Car bottom frame; 11. Overhead bracket; 12. Flow regulating valve; 13. Return air duct; 14. Car body; 15. Strip lamp; 16. Arc strip; 17. Arc tee; 18. Arc end; 19. Car wall panel; 20. Measurement port; 21. Electrical box; 22. Fastener; 23. Inlay strip; 24. Gap-reducing strip; 25. Stopping structure; 26. Gap-reducing plate; 27. Flange surface; 28. Door frame; 29. Return air opening; 30. Flexible return air duct; 211. Airflow guiding cover. Detailed implementation manners
[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.
[0045] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0046] Embodiment 1
[0047] Refer to Figure 1 , in the figure, a unidirectional flow clean elevator car provided by Embodiment 1 of the present utility model is shown, which includes a clean car top module, a car body 14, an overhead car bottom, and a return air duct 13.
[0048] The clean car top module includes a primary air filter 1, a fan 2, a box body 3, a high-efficiency air filter 4, a fastener 22, a car top plate 5, and an electrical box 21, as shown in Figure 3 and Figure 4 .
[0049] In addition to realizing the functions of an ordinary car top, the clean car top module can also provide clean air that meets a high cleanliness level and a specific air supply volume to the car body 14. When it works, the air above the car top is sucked into the box body 3 by the fan 2, and high-pressure air is formed in the inner cavity of the box body 3. During the suction process of the air, preliminary filtration is achieved through the primary air filter 1 at the air suction port of the clean car top module, filtering out suspended particles and fibers with larger particle sizes. After the high-pressure air is filtered by the high-efficiency air filter 4 to filter out the remaining harmful suspended particles, it passes through the car top plate 5 and enters the car.
[0050] A circular air flow guide cover 211 is arranged below the fan 2. The diameter of the air flow guide cover 211 is larger than the diameter of the fan 2. The air flow guide cover 211 is used to guide the air flow blown out by the fan 2 to flow upward, and the air flow flows out to the inside of the box body 3 through the edge of the air flow guide cover 211.
[0051] The airflow blown out by the fan 2 is guided by the airflow guide cover 211 and no longer blows directly to the high-efficiency air filter 4, but blows to the upper side and edge of the box body 3, increasing the pressure difference between the box body 3 and the car, thereby ensuring that the airflow passing through the high-efficiency air filter 4 is uniform, improving the uniformity of the airflow on the top surface of the car, and further forming a top-down, uniform, and mutually parallel unidirectional airflow streamline on the entire horizontal cross-sectional area of the car.
[0052] The overall air supply volume of the clean car top module is adjusted by the number and speed of the fans 2. The speed adjustment of the fans 2 can be achieved through the switch on the electrical box 21 or the adjustment signal provided by the elevator control system.
[0053] The high efficiency air filter 4 is tightly fitted with the flange surface 27 around the inside of the box body 3 through the fastener 22 to achieve buckling, and the car top plate 5 is connected to the bottom of the box body 3 through fasteners or buckles.
[0054] When checking the internal condition of the clean car top module or replacing the high efficiency air filter 4, the personnel can remove the car top plate 5 inside the car, and then loosen the fastener 22 to remove the high efficiency air filter 4, otherwise it can be reinstalled and reset.
[0055] The box body 3 adopts a hardtop design, and the upper surface can be used for personnel to stand and perform elevator maintenance work. If the plane size of the car is large, the interior of the box body can be divided into multiple cavities by partitions to increase the strength, and each cavity is separately equipped with a high-efficiency air filter 4, and the car top plate 5 can also be divided into multiple cavities according to the area size and then spliced and installed. Figure 3 and Figure 4 The example in the figure is a single-chamber dual-fan mode clean car top module.
[0056] The overhead car platform comprises a car platform plate 9, a car platform frame 10 and an overhead bracket 11. After the clean air in the car body 14 reaches the car platform, it passes through the holes on the car platform plate 9 and enters the car platform frame 10.
[0057] The car bottom frame is a rigid car base, consisting of a bottom and four walls. The bottom and four walls have a reinforcement structure to improve the structural strength. From the inside, its shape is equivalent to an uncovered rectangular box. The overhead bracket is assembled into a strip structure and erected inside this rectangular box, which is equivalent to the "keel" for laying the floor, and the car bottom plate is equivalent to the "floor". After the car bottom plate is covered, the rectangular box becomes a covered box. The space inside the box is the static pressure area except for the space occupied by the overhead bracket.
[0058] The car bottom frame 10 is a closed structure except for the return air port 29 on the side. After the air enters the car bottom frame 10, a static pressure area is formed. Driven by the static pressure, the air passes through the return air port 29 and enters the return air duct 13. Figure 1In the example, an air return opening 29 is provided at the rear side of the car bottom frame 10. The air return pipe 13 is connected to the air return opening 29, and its function is to transport the air in the car bottom frame 10 back to the clean car top module for further filtration and then send it into the car, forming a cycle.
[0059] The car floor 9 is of a hollow structure and can be a perforated plate or a grille plate. The car floor 9 is the bearing surface for passengers or goods in the car. It is laid on the overhead support 11. When the area of the car floor 9 is large, it can be installed in a way of multiple pieces splicing. The car floor 9 can be detached from the overhead support 11 for easy inspection and cleaning of the car bottom frame 10.
[0060] The number of air return pipes 13 can be set based on the required air return rate. The number of air return pipes 13 is the same as the number of air return openings 29. Figure 3 and Figure 4 The example in [X] shows a clean car top module configured with 2 air return pipes 13.
[0061] A section of flexible air return pipe 30 can be connected between the car section and the car top section of the air return pipe 13 to reduce the accuracy requirements for the docking of pipe sections during installation.
[0062] The car body 14 includes car wall panels 19, door frames 28 and car door assemblies. Among them, the car door assemblies include door machines 6, door panels 7 and door sills 8. The interior of the car body 14 is overall flat without protruding structures that block the air flow and generate eddy currents. There are small gaps between the door panels 7, between the door panels 7 and the door frames 28, and between the door panels 7 and the door sills 8. A small part of the clean air in the car body 14 can be discharged from the car through these gaps.
[0063] One or several measurement ports 20 can be provided in the upper middle part of the car body 14 to provide access positions for the probes of instruments for measuring temperature, humidity or differential pressure, etc., so as to obtain information such as temperature, humidity and differential pressure in the car for easy monitoring and automated control.
[0064] In the embodiment, the air flow direction in the car body 14 is as follows:
[0065] 1) The air in the hoistway is sucked by the clean car top module, filtered by the primary air filter 1 and the high-efficiency air filter 4 to form clean air, and then passes through the car top plate 5 and is sent into the car body 14;
[0066] 2) The clean air flows evenly from top to bottom in the car body 14. A small part is discharged from the car body 14 through the door gap, and most of it reaches the bottom of the car body 14 and then passes through the car floor 9 and enters the car bottom frame 10 to form a static pressure area;
[0067] 3) The air in the static pressure area passes through the air return opening 29 and enters the air return pipe 13;
[0068] 4) The air in the return air duct 13 is transported back to the clean car top module, and is filtered again by the high efficiency air filter 4 and then sent into the car body 14 through the car top plate 5.
[0069] So cycle, see Figure 1 .
[0070] The air supply area at the bottom of the clean car top module and the exhaust area at the top of the elevated car bottom account for a relatively high proportion compared to the horizontal cross-sectional area of the entire car, and can form uniform, parallel unidirectional air flow streamlines from top to bottom on the entire horizontal cross-sectional area of the car.
[0071] In general, the embodiment provides a unidirectional clean elevator car that can generate a uniform unidirectional clean air flow in the car, so that the space in the car can meet the cleanliness requirements of Class 100 and above, and important components can be disassembled from the inside of the car for easy inspection and maintenance. When there are contents in the car, such as when people are riding or cargo is loaded, although the airflow pattern of the unidirectional flow will be changed and a part of the exhaust holes on the car floor will be blocked, it will not affect the car to maintain the existing high cleanliness level. Even if the space in the car is contaminated by dust particles that may be attached to people or cargo, they can be discharged with the airflow, and when the car is in an empty state, the airflow pattern will return to the unidirectional flow state for self-cleaning.
[0072] Embodiment 2:
[0073] Reference Figure 2 The figure shows a one-way flow clean elevator car provided by Example 2 of the utility model. This embodiment makes the following improved technical solutions on the basis of the above embodiment: the car lighting adopts strip lamps 15, and its installation position is within the right angle edge of the connection between the car body 14 and the clean car top module.
[0074] The strip lamp 15 has a right triangle cross section, wherein the inclined surface is the light-emitting surface. When installed, the right angle direction is placed inside the right angle side of the car roof, and the inclined surface faces the inside of the car to provide lighting for the car.
[0075] The number and brightness of the strip lamps 15 can be adjusted according to the illumination requirements in the car. The strip lamps 15 can be arranged on the left and right sides of the car roof, the left and right sides of the car roof and the rear side, or on all four sides of the car roof.
[0076] The arc strips 16 are installed in the other right angle sides inside the car body 14, and the arc tees 17 are installed at the intersection of the three directions of the arc strips 16 for transition, and the ends of the arc strips 16 are installed with arc ends 18 for closing.
[0077] At the plane splicing position of the car wall panel 19, an insert strip 23 is inserted. The insert strip 23 has a T-shaped cross-section, and the two inner angles of the T shape are rounded. The arc radius is equal to or slightly smaller than the outer arc radius of the bent surface at the edge end face of the car wall panel, so that the overall surface is flat after the plane splicing of the car wall panel 19, without open acute-angle gaps, as shown in Figure 5 .
[0078] The shape and installation position of the strip-shaped lamp can avoid disturbing the air flow, and at the same time can fill the right-angle edges around the top of the car. Except for the position where the strip-shaped lamp is installed, the right-angle edges inside the car are filled with arc strips. The above design for the inner wall of the car can make the inner surface of the car smoother and rounder, reduce corners and sharp gaps, prevent dust accumulation and facilitate dust removal.
[0079] Through the above improvements, the present embodiment has the following advantages:
[0080] 1) The strip-shaped lamp 15 is installed inside the right-angle edges around the car top, avoiding the occupation of the air supply area by installing the lamp at the car top position, causing air outlet interference, thus avoiding the formation of eddy currents under the lamp body and affecting the quality of the unidirectional flow.
[0081] 2) The arc strip 16, arc tee 17 and arc end 18 are installed at the right-angle splicing positions inside the car body 14, and the insert strip 23 is installed at the plane splicing positions. Together with the strip-shaped lamp 15 installed inside the right-angle edges of the car top, the inner surface of the car body 14 becomes smoother and rounder, reducing the corners inside the car body 14 that are less than or equal to 90°, preventing dust particles from staying in the corners and gaps, and facilitating the self-cleaning and cleaning of the car.
[0082] Embodiment 3:
[0083] Referring to Figures 6 - 9 , the figure shows a unidirectional flow clean elevator car provided by the third embodiment of the present utility model. On the basis of the above embodiment, the following improved technical solutions are further made: A clearance-reducing strip 24 is installed at the gap between the door panel 7 and the door frame 28 and between the door panels 7 (in the case of multiple sliding doors) to reduce the gap. The clearance-reducing strip 24 is made of self-lubricating or elastic material, so that no harmful friction will occur during the sliding process of the door panel 7. Figure 6 The schematic diagram of the setting of the clearance-reducing strip 24 between the door panel 7 and the upright column of the door frame 28 is shown.
[0084] A clearance-reducing plate 26 is installed at the bottom of the door panel 7. The clearance-reducing plate 26 is located at the middle position of the door panel slider and extends to near the bottom of the groove of the sill 8. When the door panel 7 runs, the clearance-reducing plate 26 does not rub against the groove of the sill 8, but can form a labyrinth structure with the groove, so that the air increases the tortuous path when discharging from this position, as shown in Figure 7 .
[0085] At the closed position of the door panel 7, a rabbet structure 25 is adopted, which also increases the tortuous path when air is discharged from this position. In order to reduce the impact effect when the door panel 7 is closed and further increase the sealing performance of the closed surface, a rubber strip can also be arranged on the closed surface, see Figure 8 .
[0086] The function of the clearance-reducing strip 24 is to reduce the size of the door gap when the door panel 7 is closed, and the functions of the clearance-reducing plate 26 and the rabbet structure 25 are to increase the air flow resistance.
[0087] Through the above improvements, the present embodiment has the following advantages:
[0088] After the door panel 7 is closed, the airtightness of the car door is increased, the amount of air discharged from the inside of the car body 14 through the car door is reduced, which helps to improve the air return rate, increase the positive pressure difference of the car body 14 relative to the hoistway, and reduce the reverse pollution of air to the car body 14.
[0089] Embodiment 4:
[0090] Referring to Figure 1 , the figure shows a unidirectional flow clean elevator car provided in the fourth embodiment of the present invention. On the basis of the above embodiment, the following improved technical solutions are further made: A flow regulating valve 12 is installed between the air return port 29 and the air return pipe 13. The flow regulating valve 12 realizes the regulating function by changing the area through which the air flow passes, so as to regulate the air return rate and the positive pressure difference of the car body 14 relative to the hoistway.
[0091] When the area through which the air flow passes is reduced, the air flow rate through the air return pipe 13 is reduced, and the air flow rate discharged through the gap of the door panel 7 is increased, and the positive pressure difference of the car body 14 relative to the hoistway becomes larger;
[0092] When the area through which the air flow passes is increased, the air flow rate through the air return pipe 13 is increased, and the air flow rate discharged through the gap of the door panel 7 is reduced, and the positive pressure difference of the car body 14 relative to the hoistway becomes smaller.
[0093] The flow regulating valve 12 can be adjusted manually or electrically:
[0094] When manual adjustment is adopted, the adjustment lever of the flow regulating valve 12 can extend out of the air return port 29 towards the inside of the car bottom frame 10, and the personnel can open the car floor 9 near the air return port 29 in the car to contact the adjustment lever;
[0095] When electric adjustment is adopted, its control cable can be connected to the electrical box 21 and finally connected to the elevator operating system.
[0096] Through the above improvements, the present embodiment has the following advantages:
[0097] Increase the flexibility of regulating the return air rate of the car and the positive pressure difference outside the car. When the car has special requirements for the return air rate, especially the magnitude of the positive pressure difference outside the car, it can be flexibly adjusted. The principle of this device is simple and the operation is convenient.
[0098] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.
Claims
1. A one-way clean elevator car, characterized in that: include: Car body; A clean car top module, comprising a primary air filter, a fan, a box, a high-efficiency air filter and a car top plate, wherein the box is arranged on the top of the car body, the bottom of the box is provided with the high-efficiency air filter and the car top plate arranged in sequence, the top of the box is provided with a fan, the fan is used to suck the air above the car top into the box, and form high-pressure air in the inner cavity of the box, and the primary air filter is provided at the air intake port of the box; An overhead car platform is arranged at the bottom of the car body, the overhead car platform comprises a car platform plate, a car platform frame and an overhead bracket, the car platform plate is fixedly mounted on the overhead bracket, the car platform plate is a hollow plate body, the overhead bracket is arranged in the car platform frame, air enters the car platform frame after passing through the car platform plate, and the air forms a static pressure zone in the car platform frame, the car platform frame is connected to the return air duct through the return air port on the side wall, and the return air duct is connected to the box body; A flow regulating valve is installed between the return air port and the return air duct, and the flow regulating valve realizes the regulating function by changing the area through which the airflow passes, thereby adjusting the return air rate and the positive pressure difference in the car body relative to the hoistway; The car body comprises a car wall panel, a door frame and a car door assembly, the car wall panel is arranged on the side of the car body, the door area of the car body is arranged with the door frame, the car door assembly is arranged at the door frame, the car door assembly comprises a door machine, a door panel and a sill, and the door machine is used to drive the door panel to slide along the sill to open and close; The clean air flows evenly from top to bottom in the car body. After reaching the bottom of the car body, it passes through the car floor plate and enters the car floor frame to form a static pressure area. The air in the static pressure area passes through the return air port and enters the return air duct, forming a top-down, uniform, and parallel unidirectional airflow streamline on the entire horizontal cross-sectional area of the car.
2. A one-way flow clean elevator car according to claim 1, characterized in that: A gap reduction strip is arranged between the door panel and the door frame.
3. A one-way flow clean elevator car according to claim 1, characterized in that: A gap reducing plate is arranged at the bottom of the door panel, a groove corresponding to the position of the gap reducing plate is arranged on the surface of the sill, and the gap reducing plate extends into the groove.
4. A one-way flow clean elevator car according to claim 1, characterized in that: A "Z"-shaped stop structure is arranged between the door panels, and a rubber strip is arranged on the closing surface of the stop structure.
5. The one-way flow clean elevator car according to claim 1, characterized in that: The car body is provided with a strip lamp, and the strip lamp is arranged within the right-angled side of the car body.
6. A one-way flow clean elevator car according to claim 5, characterized in that: Arc bars are installed in the right-angled sides of the car body.
7. The one-way flow clean elevator car according to claim 1, characterized in that: A circular airflow guide cover is arranged below the fan. The diameter of the airflow guide cover is larger than the diameter of the fan. The airflow guide cover is used to guide the airflow blown out by the fan to flow upward, and the airflow flows out into the box through the edge of the airflow guide cover.