Elevator ventilation system and method

Abstract

The invention discloses an elevator ventilation system, and belongs to the technical field of elevator equipment. The system comprises an elevator car, a top plate, a heat exchange box, an air blowing mechanism, a filter box, a suction fan and an air guide assembly. A cold air duct and a hot air duct are formed by arranging the semiconductor chilling plate and the refrigerating fins and the radiating fins which are distributed up and down, so that cooling and heat removal of air in the lift car are realized; cold air is sent into the heat exchange box through the cold air pipe after being purified by the external filter box, and is sent into the lift car through the blowing mechanism after being refrigerated; hot air is pumped out through the suction fan and discharged out of the elevator shaft through the hot air duct along the air guide path; and meanwhile, the system is provided with the liftable top plate and the turnover heat exchange assembly, so that overhaul and maintenance are facilitated. The system is compact in structure and efficient in operation and has good ventilation and temperature control functions, and the elevator taking comfort and the system maintainability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevators, and in particular relates to an elevator ventilation system and method. Background Art

[0002] In existing technology, elevators, as important vertical transportation tools in high-rise buildings, operate frequently and operate in enclosed spaces. This can lead to poor air circulation and high temperatures in the cabin, especially in hot summer weather. This can easily cause passengers to feel stuffy and uncomfortable, and may even cause safety hazards such as heatstroke. To address this, some elevator systems are equipped with basic ventilation devices or simple exhaust fans, but most only have air replacement functions, failing to achieve effective temperature control. The ventilation paths are limited, resulting in inadequate air circulation. Furthermore, most existing systems enclose the ventilation devices at the top of the elevator or inside the shaft, making them difficult to inspect and maintain, complex to operate, and inefficient to repair.

[0003] For example, some traditional elevators use a top-mounted forced air supply structure, drawing outside air into the car through a fan, but lack a temperature control unit. This results in the air temperature being too high even in hot environments, failing to improve riding comfort. Some systems have attempted to incorporate condensing devices, but due to their compact layout and fixed structure, they often struggle to achieve effective cooling due to short cooling air paths, uneven air volume, or low heat exchange efficiency. Furthermore, because ventilation and refrigeration systems are typically installed in a closed environment, system maintenance requires the disassembly of numerous structural components, resulting in a cumbersome inspection process and inconvenient manual operation, impacting the equipment's operational stability and economical maintenance. Summary of the Invention

[0004] In response to the problems existing in the prior art, the purpose of the present invention is to provide an elevator ventilation system and method, which can not only achieve effective replacement and cooling of the air in the car, but also perform ventilation docking when the car is stationary, thereby improving the utilization rate of cold air. At the same time, it has the characteristics of a detachable structure and convenient maintenance, so as to improve the elevator environment and enhance operational safety and system maintainability.

[0005] To achieve the above object, the present invention provides the following technical solutions: An elevator ventilation system includes an elevator car, a roof mounted on the top of the elevator car, a heat exchange box mounted on the roof, two left and right blower mechanisms mounted on the roof, a plurality of filter boxes mounted between floors, and an exhaust fan mounted on the inside of the elevator car near the bottom; The blower mechanism is connected to the cooling part of the heat exchange box, and blows air into the elevator car. The heat exchange box provides cold air to the blower mechanism. A cold air duct is fixed on the side of the elevator car facing the elevator door. The cold air duct is detachably connected to the heat exchange box and is connected to the filter box. A hot air duct is fixed on the side of the elevator car facing the elevator door. The hot air duct is connected to the heat dissipation part of the heat exchange box. The suction fan draws air into the inner side of the elevator car and sends the sucked hot air to the hot air duct through the air outlet and the air guide duct. The hot air duct sends the hot air to the heat exchange box, and the heat exchange box uses the air sent by the hot air duct to dissipate the heat to the outside. The top plate can be raised and lowered and installed on the inner side of the elevator car. Winches for raising and lowering the top plate are fixed on the left and right sides of the upper end of the elevator car. A rotating plate that can be rotated downward is installed in the middle of the top plate. When the rotating plate is rotated to a horizontal state, the position is locked and fixed by a locking mechanism. The heat exchange box and the blower mechanism are both installed on the rotating plate.

[0006] Furthermore, a semiconductor refrigeration plate is provided on the inner side of the heat exchange box, and heat dissipation fins and cooling fins are fixed on the upper and lower sides of the semiconductor refrigeration plate respectively. Hot air ducts and cold air ducts are provided in the middle parts of the heat dissipation fins and cooling fins respectively. The hot air duct and the cold air duct are connected to the hot air pipe and the cold air pipe respectively. Heat dissipation ports are provided on the left and right sides of the heat exchange box corresponding to the heat dissipation fins, and the left and right sides of the heat exchange box corresponding to the cooling fins are respectively connected to the air blowing mechanisms on both sides, and circular holes are provided on the rear side of the heat exchange box corresponding to the hot air duct and the cold air duct.

[0007] Furthermore, a second docking plate is fixed to the front end of the hot air pipe and the cold air pipe, and a rubber ring is fixed to the side of the second docking plate facing the circular hole, and the inner diameter of the rubber ring is larger than the diameter of the circular hole.

[0008] Furthermore, the blowing mechanism includes a blowing fan fixed on a rotating plate, a grid plate is provided on the lower side of the blowing fan, and an air supply pipe connected to the heat exchange box is provided on the upper side of the blowing fan, and the air supply pipe is fixedly connected to the blowing fan through a connecting plate.

[0009] Furthermore, a connecting pipe is fixed to the front side of the filter box, a first docking plate is fixed to the front end of the connecting pipe, and a cover facing the opening of the first docking plate is fixed to the rear end of the cold air pipe, and the inner diameter of the cover is larger than the diameter of the center hole of the first docking plate.

[0010] Furthermore, the rear opening of the filter box is set, and a filter plate is installed on the inner side of the filter box. A rotatable shielding plate is installed at the rear opening of the filter box. The shielding plate is locked and fixed when closed by a buckle plate, and the shielding plate is set in a grid shape.

[0011] Furthermore, guide plates are fixed on both sides of the top plate, and guide grooves are provided on the left and right side walls of the elevator car to guide the guide plates to move up and down. The top plate is set in a square frame shape, and the rotating plate is rotatably installed on the inner side of the top plate.

[0012] Furthermore, the locking mechanism includes a clearance opening on the rotating plate, a push plate is installed on the inner side of the clearance opening, an insert plate is fixed on the upper end of the push plate and moves forward and is inserted on the inner wall of the top plate, and a guide sleeve is fixed on the rotating plate to guide the movement of the insert plate.

[0013] Furthermore, sleeve holes are opened near both ends of the air duct, and the air duct is connected to the hot air duct and the air outlet through the two sleeve holes respectively. A plurality of evenly distributed mounting plates are fixed to the outside of the air duct.

[0014] A method for using an elevator ventilation system comprises the following steps: S1: During ventilation, the cooling side of the semiconductor refrigeration plate uses the cooling fins to cool the lower part of the heat exchange box, while the heating side uses the heat dissipation fins to dissipate heat to the upper part of the heat exchange box; S2: When the elevator car stops at a certain floor, the heat exchanger box is connected to the cold air duct and the connecting pipe. At this time, the outside air enters the cold air duct through the filter box and the connecting pipe. The cold air duct sends the air into the cold air duct in the heat exchanger box. The air in the cold air duct flows to the left and right and is blown into the elevator car through the air supply pipe and the blower fan to replenish fresh air. S3: The exhaust fan in the elevator car draws away the exhaust air in the elevator car and sends it to the hot air pipe through the air duct. The hot air pipe then sends the air to the heating part of the heat exchanger. The incoming air flows to the left and right sides through the hot air duct and is discharged into the elevator shaft through the heat dissipation port. Finally, it is discharged through the exhaust fan at the top of the elevator shaft, thus completing the ventilation and cooling of the elevator car. S4: When inspecting the heat exchanger box and the blower mechanism, the winding wire rope is paid out using a winch, and the top plate is lowered until it is convenient for maintenance personnel to carry out inspection work; S5: Then detent the push plates on the two locking mechanisms to move the two insert plates away from the top plate, thereby rotating the rotating plate downward, so that the heat exchange box and the blower mechanism are exposed to the maintenance personnel, so that maintenance operations can be carried out.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The elevator ventilation system provided by the present invention can effectively solve the existing problems of poor air circulation inside elevator cars and the poor elevator riding experience in high summer temperatures. By integrating semiconductor refrigeration chips and their corresponding cooling and heat dissipation fins inside the heat exchange box, combined with the rational distribution of cold and hot air ducts, the system allows filtered outside air to be introduced into the heat exchange module when the elevator is stationary. The blower mechanism then delivers cold air into the elevator car. At the same time, a suction fan is used to guide exhaust air from the car into the hot air duct for discharge. This allows for simultaneous cooling and ventilation during elevator operation, improving the fluidity and comfort of the air inside the elevator car.

[0016] The cold air intake structure and its docking design with the filter box provided by this invention effectively enable the automatic intake of outside air when the elevator is parked. By providing a cover and docking plate structure, coupled with a rubber ring seal, efficient communication is achieved between the cold air duct and the filter box, avoiding the unstable ventilation connection problem found in existing systems. Furthermore, by providing a filter plate and an openable baffle within the filter box, the incoming air undergoes multi-stage filtration, improving the cleanliness of the system's ventilation air.

[0017] The hot air exhaust duct structure provided by this invention efficiently exhausts exhaust air from the elevator car. By installing an air intake fan at the bottom of the car and combining it with an air duct, hot air duct, hot air duct, heat dissipation fins, and heat dissipation vents, hot air from the ventilation process is uniformly discharged into the elevator shaft and then exhausted by the exhaust fan. This effectively solves the problems of hot air stagnation, short exhaust paths, and low heat exchange efficiency in traditional elevators, and improves the heat dissipation capacity during the ventilation process.

[0018] The structurally accessible design provided by this invention fully addresses the low maintenance efficiency inherent in conventional elevator ventilation systems, often due to their enclosed structure and difficult assembly and disassembly. By incorporating a liftable top plate and a reversible rotating plate, the entire heat exchange system can be lowered into the elevator car through the coordinated action of a hoisting and locking mechanism. This allows maintenance personnel to inspect and maintain internal components without having to ascend, significantly improving both ease of inspection and system maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of an elevator car of the present invention; Figure 3 Schematic diagram of the heat exchange box of the present invention; Figure 4 It is an enlarged view of point A of the present invention; Figure 5 It is a schematic diagram of the structure of the hair dryer of the present invention; Figure 6This is a schematic diagram of the filter box and the cold air duct in cooperation with each other; Figure 7 is a schematic diagram of the filter box of the present invention; Figure 8 Schematic diagram of the top plate and the rotating plate of the present invention in the matching state Figure 9 Schematic diagram of the locking mechanism of the present invention; Figure 10 Schematic diagram of the air duct of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Elevator car; 2. Top plate; 21. Guide plate; 3. Hoist; 4. Blower mechanism; 41. Air supply pipe; 42. Connecting plate; 43. Blower fan; 44. Grid plate; 5. Heat exchanger; 51. Cover; 52. Heat dissipation fins; 53. Hot air duct; 54. Heat dissipation vent; 55. Cooling fins; 56. Cold air duct; 57. Semiconductor cooling fin; 6. Hot air duct; 7. Filter box; 71. Connecting pipe; 72. First docking plate; 73, shielding plate; 74, filter plate; 75, buckle plate; 8, cold air duct; 81, cover; 9, rotating plate; 91, mounting opening; 92, locking mechanism; 921, plug plate; 922, guide sleeve; 923, push plate; 924, clearance opening; 10, air duct; 101, sleeve hole; 102, mounting plate; 11, suction fan; 12, air outlet; 13, second docking plate; 14, rubber ring. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0022] like Figure 1 and Figure 2 As shown, an elevator ventilation system includes an elevator car 1, a top plate 2 mounted on the top of the elevator car 1, a heat exchange box 5 mounted on the top plate 2, two left and right blower mechanisms 4 mounted on the top plate 2, a plurality of filter boxes 7 mounted between each floor, and an intake fan 11 mounted on the inner side of the elevator car 1 near the bottom; The blower mechanism 4 is connected to the cooling part of the heat exchange box 5. A semiconductor refrigeration sheet 57 is installed inside the heat exchange box 5. A cooling fin 55 is installed below the refrigeration sheet. The cooling fin 55 is arranged in the cold air duct 56. The blower mechanism 4 includes an air supply pipe 41, a blower fan 43, a connecting plate 42 and a grid plate 44. One end of the air supply pipe 41 is connected to the cooling fin 55, and the other end is fixed to the blower fan 43 through the connecting plate 42. A grid plate 44 for guiding air is provided below the blower fan 43. The cold air is transported from the heat exchange box 5 to the blower fan 43 through the air supply pipe 41, and then blown by the blower fan 43 into the elevator car 1 to achieve cooling; A cold air duct 8 is fixed to the side of the elevator car 1 facing the elevator door. A cover 81 is provided at the rear end of the cold air duct 8. The cover 81 opens toward the first docking plate 72 of the filter box 7. The inner diameter of the cover 81 is larger than the diameter of the center hole of the first docking plate 72, and is used to achieve air guide docking and sealing. The front end of the cold air duct 8 is connected to the rear circular hole of the cold air duct 56 of the heat exchange box 5, achieving air duct penetration. The front side of the filter box 7 is fixedly connected to the first docking plate 72 via a connecting pipe 71. A shielding plate 73 is provided at the rear opening of the filter box 7. The shielding plate 73 is locked by a buckle plate 75 and has a grid structure. A filter plate 74 is provided inside the filter box 7 for purifying the air entering the cold air duct 8. The hot air circulation part includes a hot air pipe 6 installed on the door side of the elevator car 1. A second docking plate 13 is installed at the front end of the hot air pipe 6. The second docking plate 13 faces the circular hole of the hot air duct 53 on the rear side of the heat exchange box 5 and is provided with a rubber ring 14. The inner diameter of the rubber ring 14 is larger than the diameter of the circular hole for buffering and sealing. A suction fan 11 is provided at the bottom of the elevator car 1. The suction fan 11 is connected to the air duct 10 through the air outlet 12. The air duct 10 has sleeve holes 101 at both ends thereof connected and sealed to the air outlet 12 and the hot air duct 6. A plurality of mounting plates 102 are installed on the outer wall of the air duct 10 to ensure structural stability. The exhaust fan 11 sucks the exhaust gas in the car and sends it into the hot air pipe 6 through the air duct 10. The hot air pipe 6 sends the gas into the hot air duct 53 of the heat exchange box 5. The hot air duct 53 is surrounded by heat dissipation fins 52. After heat conduction by the fins, the hot air is discharged into the elevator shaft through the heat dissipation ports 54 set on both sides of the heat exchange box 5, and is further discharged by the exhaust fan at the top of the elevator shaft, realizing the car ventilation and heat dissipation functions.

[0023] like Figure 1 and Figure 8 As shown, the top plate 2 is installed on the inner side of the elevator car 1 in a liftable manner. A hoist 3 for driving the top plate 2 to move up and down is fixed on both the left and right sides of the upper end of the elevator car 1. The hoist 3 drives the top plate 2 to move up and down by winding a steel wire rope. The top plate 2 is configured as a square frame structure, and guide plates 21 are respectively installed on the left and right sides thereof. The guide plates 21 cooperate with the guide grooves provided on the inner side walls of the elevator car 1 for vertical guidance and limiting, ensuring that the lifting process of the top plate 2 is stable and smooth. A rotatable rotating plate 9 is installed in the middle of the top plate 2. The rotating plate 9 can rotate downward around a horizontal axis and is locked and fixed by a locking mechanism 92 when it is rotated to a horizontal state. The locking mechanism 92 includes a push plate 923, an inserting plate 921, a guide sleeve 922, and a clearance opening 924 provided on the rotating plate 9. The plug plate 921 is guided by the guide sleeve 922 and can be inserted into the socket on the inner wall of the top plate 2 to achieve positioning and locking. The push plate 923 is used to drive the plug plate 921 to complete the plugging and unplugging action, so that the rotating plate 9 remains stable or rotates to unlock. The heat exchange box 5 and the blower mechanism 4 are both installed on the lower side of the rotating plate 9. When the top plate 2 drops, the rotating plate 9 is flipped to present the entire ventilation system inside the elevator car 1, which is convenient for maintenance operations.

[0024] like Figure 3 As shown, a semiconductor refrigeration sheet 57 is provided on the inner side of the heat exchange box 5, and heat dissipation fins 52 and cooling fins 55 are fixed on the upper and lower sides of the semiconductor refrigeration sheet 57 respectively; The heat dissipation fins 52 are arranged on the upper side of the cooling fins 57 and around the outer periphery of the hot air duct 53 to absorb the heat carried by the gas in the hot air pipe 6 and quickly conduct it outwards; The cooling fins 55 are provided on the lower side of the cooling fins 57 and arranged on the periphery of the cold air duct 56 to cool the air flowing through the cold air duct 56; The hot air duct 53 and the cold air duct 56 are arranged in the middle part of the heat exchange box 5, and are connected to the hot air pipe 6 and the cold air pipe 8 respectively; The left and right sides of the heat exchange box 5 are symmetrically provided with a plurality of heat dissipation openings 54 at positions corresponding to the heat dissipation fins 52. The heat dissipation openings 54 are configured to discharge the air cooled by the heat dissipation fins 52. The left and right sides of the heat exchange box 5 are respectively connected to the blower mechanisms 4 at positions corresponding to the refrigeration fins 55, and the rear side of the heat exchange box 5 is provided with circular holes at positions corresponding to the hot air duct 53 and the cold air duct 56, which are used to connect with the hot air pipe 6 and the cold air pipe 8 through the second docking plate 13.

[0025] like Figure 4 As shown, the front ends of the hot air pipe 6 and the cold air pipe 8 are fixed with second docking plates 13, and the second docking plates 13 are respectively matched with the circular holes on the rear side of the heat exchange box 5; A rubber ring 14 is fixedly mounted on one side of the second docking plate 13 facing the circular hole. The rubber ring 14 is an annular structure with an inner diameter larger than the diameter of the corresponding circular hole. The rubber ring 14 is used to buffer the connection and improve air tightness to prevent cold and hot air leakage. When the top plate 2 rises and returns to the working state, the circular hole on the rear side of the heat exchange box 5 automatically connects with the second docking plate 13 on the hot air pipe 6 and the cold air pipe 8 and presses the rubber ring 14, thereby ensuring the complete ventilation and air exchange effect of the air duct system.

[0026] like Figure 5 As shown, the blower mechanism 4 includes a blower fan 43 fixed on the rotating plate 9. The blower fan 43 is arranged below the refrigeration part of the heat exchange box 5 and is used to send the cold air cooled by the refrigeration fins 55 into the elevator car 1; An air supply pipe 41 connected to the outlet of the cold air duct 56 of the heat exchange box 5 is provided on the upper side of the blowing fan 43. The air supply pipe 41 is sealed and fixedly connected to the blowing fan 43 through a connecting plate 42 to ensure that the cold air circulates without leakage. A grid plate 44 is installed on the lower side of the blowing fan 43. The grid plate 44 is a fixed protective structure and has a rectifying function. It can guide the flow of cold air and prevent foreign matter from entering the blowing fan impeller, thereby improving air supply efficiency and safety.

[0027] like Figure 6 As shown, a connecting pipe 71 is fixed to the front side of the filter box 7, and the connecting pipe 71 is used to introduce external air from the filter box 7 to the cold air pipe 8; A first docking plate 72 is provided at the front end of the connecting pipe 71. The first docking plate 72 is used to dock with the cover 81 at the rear end of the cold air pipe 8 to form a channel for the outside air to enter. The cover 81 is fixedly mounted on the rear end of the cold air duct 8, with its opening facing the first docking plate 72. The inner diameter of the cover 81 is larger than the diameter of the center hole of the first docking plate 72, and is used to achieve guiding positioning and sealing buffering during insertion, ensuring that air can smoothly enter the cold air duct 8 and enter the heat exchange box 5 through this path.

[0028] like Figure 7 As shown, the rear side of the filter box 7 is set as an opening structure for the outside air to enter; A filter plate 74 is installed inside the filter box 7. The filter plate 74 is made of high-efficiency air filter material, which can effectively block dust particles from entering the system and prevent the heat exchange system from being contaminated. A rotatable baffle 73 is installed at the rear opening of the filter box 7. The baffle 73 is set as a grid-like structure to initially block the entry of foreign matter and protect the internal filter components. The baffle 73 is locked and fixed when closed by a buckle plate 75 installed on its edge to ensure structural stability and easy opening and closing.

[0029] like Figure 8 As shown, guide plates 21 are fixed on both the left and right sides of the top plate 2, and the guide plates 21 cooperate with the guide grooves provided on the left and right inner walls of the elevator car 1; The guide groove is used to limit the vertical movement trajectory of the guide plate 21 to ensure that the top plate 2 moves smoothly and does not deviate during the lifting process; The top plate 2 is a square frame structure with a rotating plate 9 in the center area. The rotating plate 9 can be flipped downward around the horizontal axis. During maintenance, the ventilation structure can be unfolded downward through the unlocking device, which is convenient for operators to carry out maintenance in the car.

[0030] like Figure 9As shown, the locking mechanism 92 includes a clearance opening 924 provided on the rotating plate 9, a push plate 923 is provided inside the clearance opening 924, and an inserting plate 921 is fixed to the upper end of the push plate 923; The insert plate 921 is used to insert into the inner wall of the top plate 2 when the rotating plate 9 is rotated to the horizontal state, so as to lock and fix the rotating plate 9 to prevent the structure from sagging or vibration displacement; When the push plate 923 is subjected to manual force, it can be pushed in the horizontal direction to make the plug plate 921 withdraw from the insertion hole, thereby unlocking the rotating plate 9; A guide sleeve 922 is also fixed to the rotating plate 9. The guide sleeve 922 is used to guide the inserting plate 921 to move smoothly along a specified trajectory, ensuring that the locking structure operates accurately and reliably.

[0031] like Figure 10 As shown, the air duct 10 is provided with sleeve holes 101 near both ends, and the sleeve holes 101 are used to plug and seal the air duct 10 with the hot air duct 6 and the air outlet 12; A plurality of mounting plates 102 are evenly distributed on the outside of the air duct 10. The mounting plates 102 are fixed to the inner wall of the elevator car 1 by screw connection to enhance the stability and vibration resistance of the air duct 10 and prevent it from loosening or falling during operation. The air duct 10 acts as a connecting bridge in the overall ventilation cycle, guiding the exhaust gas output by the suction fan 11 to the heat exchange box 5 for heat dissipation, thereby ensuring smooth air renewal in the cabin.

[0032] A method for using an elevator ventilation system comprises the following steps: S1: During ventilation, the cooling side of the semiconductor refrigeration plate 57 is driven by the thermoelectric effect through electrical conduction, thereby realizing hot and cold zones inside the heat exchange box 5. The lower side of the refrigeration plate 57 is connected to the cooling fin 55, which is located outside the cold air duct 56. The cooling fins 55 are in full contact with the air by increasing the surface area, and quickly cool the cold air in the cold air duct 56; At the same time, the heating side dissipates heat through the heat dissipation fins 52 connected to its upper end. The heat dissipation fins 52 are arranged around the outside of the hot air duct 53. The hot air flowing in the hot air duct 53 exchanges heat with the heat dissipation fins 52, and conducts heat to the left and right sides of the heat exchange box 5; The air after heat dissipation is discharged into the elevator shaft through multiple heat dissipation ports 54 arranged at the left and right ends of the heat exchange box 5, and then forced out to the outside of the shaft through the exhaust fan at the upper end of the elevator shaft, thereby completing the basic heat and cold separation and preliminary exhaust process of the ventilation system.

[0033] S2: When the elevator car 1 stops at a certain floor, the cold air duct 8 fixed on one side of the elevator car 1 is automatically connected to the first docking plate 72 at the front end of the filter box 7 provided at the floor through the cover 81; After the connection is completed, the rear shielding plate 73 of the filter box 7 automatically opens under the action of wind pressure, allowing the external air to enter the interior of the cold air duct 8 through the shielding plate 73, the filter plate 74 and the connecting pipe 71; The filter plate 74 performs preliminary purification on the air to remove suspended particles and dust. The filtered air flows into the cold air pipe 8 through the cover 81 and then enters the cold air duct 56 inside the heat exchange box 5; The air flows left and right along both sides of the refrigeration fins 55 in the cold air duct 56 and is cooled. The cooled air enters the blowing fan 43 through the air supply pipes 41 on both sides. The blowing fan 43 rotates at high speed to send the cold air downward into the elevator car 1, thereby completing the purification, cooling and injection process of the external fresh air.

[0034] S3: After the suction fan 11 installed near the bottom of the elevator car 1 is turned on, the hot air and exhaust gas accumulated in the car 1 are forcibly sucked out, and the sucked gas flows into the air duct 10 through the air outlet 12; The two ends of the air duct 10 are connected to the hot air duct 6 and the air outlet 12 respectively through the sleeve holes 101. The mounting plate 102 provided on the outside of the air duct 10 fixes it to the inner wall of the elevator car 1 to ensure the structural stability of the air guide path; After the exhaust gas is sent into the hot air pipe 6 through the air duct 10, it is pushed into the hot air duct 53 of the heat exchange box 5 under the action of wind pressure; The gas carried by the hot air duct 53 exchanges heat around the arranged heat dissipation fins 52 when flowing through it. The heat is conducted to the heat dissipation ports 54 at the left and right ends of the heat exchange box 5 through the fins 52, and the hot air is discharged into the elevator shaft through the heat dissipation ports 54. Finally, the exhaust fan installed at the top of the elevator shaft is forced to discharge the hot air outside the elevator shaft, thus forming a complete air circulation and heat dissipation process inside the car.

[0035] S4: When inspecting the heat exchange box 5 and the blower mechanism 4, the winches 3 installed on the left and right sides of the upper end of the elevator car 1 are operated to pay out the wire. The wire rope wound by the winches 3 is slowly released under the action of the electric drive, causing the top plate 2 installed at the lower end of the wire rope to move vertically downward along the matching path between the guide groove and the guide plate 21; The top plate 2 is kept in a stable posture and descends under the restriction of the guide structure until it descends to a height position convenient for maintenance personnel to operate; At this time, the rotating plate 9 installed on the inner side of the top plate 2 is in a horizontal locked state, and subsequent structural flipping operations can be performed.

[0036] S5: The operator then manually detents the two push plates 923 on the locking mechanism 92, causing the push plates 923 to move horizontally along the guide sleeve 922, thereby driving the inserting plate 921 to exit the slot on the inner wall of the top plate 2, thereby unlocking the rotating plate 9; After unlocking, the rotating plate 9 rotates downward around its mounting axis, and the heat exchange box 5 and the two blower mechanisms 4 mounted on the rotating plate 9 are flipped over as a whole and presented inside the elevator car 1. Maintenance personnel can perform maintenance operations such as cleaning, replacing components, or troubleshooting the system inside the car. After the inspection is completed, the rotating plate 9 is flipped upward to return to the horizontal position, and the push plate 923 is pushed in the opposite direction to reinsert the inserting plate 921 into the slot of the top plate 2 to re-lock and fix the heat exchange module. The top plate 2 then rises along the guide groove and resets under the traction of the winch 3, so that the two circular holes opened on the rear side of the heat exchange box 5 are aligned with the second docking plate 13 at the front end of the hot air pipe 6 and the cold air pipe 8 again, and the rubber ring 14 forms a tight fit at the contact surface, realizing the re-sealing connection of the air duct system and ensuring that the ventilation system returns to normal ventilation and temperature control operation.

[0037] The working principle of the present invention is as follows: when the outdoor temperature is high in summer, the semiconductor refrigeration sheet 57 is activated to cool the refrigeration fins. When the elevator car 1 stops at a certain floor, the cover 81 on the cold air pipe 8 is aligned with the first docking plate 72 on the connecting pipe 71, so that the cold air pipe 8 and the connecting pipe 71 are connected. At this time, the blowing fan 43 works to allow the outside air to enter the inner side of the filter box 7 and be filtered by the filter plate 74. The filtered air then enters the inner side of the cold air duct 56 through the connecting pipe 71 and the cold air pipe 8. The air entering the cold air duct 56 flows to the left and right sides along the refrigeration fins 55 and is cooled. The cooled air is then sent into the elevator car 1 through the air supply pipe 41 and the blowing fan 43 for cooling and cooling. While cooling the elevator car 1, the suction fan 11 draws air from the elevator car 1 and sends it to the hot air pipe 6 through the air duct 10. The hot air pipe 6 then sends the air into the hot air duct 53 and flows to the left and right sides along the heat dissipation fins 52 and finally discharged into the elevator shaft through the heat dissipation port 54. Finally, the air is discharged outward through the exhaust fan at the upper end of the elevator shaft, thereby completing the ventilation and cooling of the elevator car 1. When the ventilation system needs to be inspected, the winch 3 is controlled to release the wire to lower the top plate 2, and then the push plate 923 is pushed to separate the plug plate 921 from the top plate. At this time, the rotating plate 9 is rotated downward to expose the ventilation system to the inside of the elevator car 1. At this time, the maintenance personnel can directly inspect the elevator car 1, making the inspection operation easier and more convenient. After the inspection is completed, the rotating plate 9 is rotated upward to a horizontal state, and the push plate 923 is pushed in the opposite direction so that the plug plate 921 is inserted into the top plate 2 for locking. At this time, the heat exchange box 5 is tightly attached to the second docking plate 13 on the hot air pipe 6 and the cold air pipe 8, as well as the rubber ring 14 on the second docking plate 13. At this time, the two circular holes opened on the rear side of the heat exchange box 5 are respectively connected to the hot air pipe 6 and the cold air pipe 8, thereby completing the ventilation docking of the ventilation system.

[0038] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An elevator ventilation system, comprising an elevator car (1), characterized in that: It also includes a top plate (2) installed on the top of the elevator car (1), a heat exchange box (5) installed on the top plate (2), two left and right blower mechanisms (4) installed on the top plate (2), a plurality of filter boxes (7) installed between each floor, and a suction fan (11) installed on the inner side of the elevator car (1) near the bottom; The blower mechanism (4) is connected to the cooling part of the heat exchange box (5), and the blower mechanism (4) blows air into the elevator car (1). The heat exchange box (5) provides cold air to the blower mechanism (4). A cold air pipe (8) is fixed on the side of the elevator car (1) facing the elevator door. The cold air pipe (8) is detachably connected to the heat exchange box (5), and the cold air pipe (8) is connected to the filter box (7). A hot air pipe (6) is fixed on the side of the elevator car (1) facing the elevator door, and the hot air pipe (6) is connected to the heat dissipation part of the heat exchange box (5). The suction fan (11) sucks air into the inner side of the elevator car (1), and the suction fan (11) sends the sucked hot air to the hot air pipe (6) through the air outlet (12) and the air guide pipe (10). The hot air pipe (6) sends the hot air to the heat exchange box (5), and the heat exchange box (5) uses the air sent by the hot air pipe (6) to dissipate the heat to the outside. The top plate (2) is installed on the inner side of the elevator car (1) in a liftable manner. A winch (3) for lifting and lowering the top plate (2) is fixed on both the left and right sides of the upper end of the elevator car (1). A rotating plate (9) that can be rotated downward is installed in the middle part of the top plate (2). When the rotating plate (9) is rotated to a horizontal state, the position is locked and fixed by a locking mechanism (92). The heat exchange box (5) and the blower mechanism (4) are both installed on the rotating plate (9).

2. An elevator ventilation system according to claim 1, characterized in that: A semiconductor refrigeration plate (57) is provided on the inner side of the heat exchange box (5), and heat dissipation fins (52) and cooling fins (55) are fixed on the upper and lower sides of the semiconductor refrigeration plate (57), respectively. A hot air duct (53) and a cold air duct (56) are provided in the middle of the heat dissipation fins (52) and the cooling fins (55), respectively. The hot air duct (53) and the cold air duct (56) are connected to the hot air pipe (6) and the cold air pipe (8), respectively. The left and right sides of the heat exchange box (5) are provided with heat dissipation ports (54) at positions corresponding to the heat dissipation fins (52), and the left and right sides of the heat exchange box (5) are connected to the blower mechanisms (4) on both sides at positions corresponding to the cooling fins (55), respectively. The rear side of the heat exchange box (5) is provided with circular holes at positions corresponding to the hot air duct (53) and the cold air duct (56).

3. The elevator ventilation system according to claim 2, characterized in that: A second docking plate (13) is fixed to the front ends of the hot air pipe (6) and the cold air pipe (8), and a rubber ring (14) is fixed to the side of the second docking plate (13) facing the circular hole, wherein the inner diameter of the rubber ring (14) is larger than the diameter of the circular hole.

4. The elevator ventilation system according to claim 2, characterized in that: The blowing mechanism (4) comprises a blowing fan (43) fixed on a rotating plate (9), a grid plate (44) is provided on the lower side of the blowing fan (43), and an air supply pipe (41) connected to the heat exchange box (5) is provided on the upper side of the blowing fan (43), and the air supply pipe (41) is fixedly connected to the blowing fan (43) via a connecting plate (42).

5. The elevator ventilation system according to claim 3, characterized in that: A connecting tube (71) is fixed to the front side of the filter box (7), a first docking plate (72) is fixed to the front end of the connecting tube (71), and a cover (81) facing the opening of the first docking plate (72) is fixed to the rear end of the cold air pipe (8), wherein the inner diameter of the cover (81) is larger than the diameter of the center hole of the first docking plate (72).

6. The elevator ventilation system according to claim 5, characterized in that: The filter box (7) is provided with a rear opening, and a filter plate (74) is installed on the inner side of the filter box (7). A rotatable shielding plate (73) is installed at the rear opening of the filter box (7). The shielding plate (73) is locked and fixed when closed by a buckle plate (75), and the shielding plate (73) is provided in a grid shape.

7. The elevator ventilation system according to claim 1, characterized in that: Guide plates (21) are fixed on both the left and right sides of the top plate (2), and guide grooves for guiding the guide plates (21) to move up and down are provided on both the left and right side walls of the elevator car (1). The top plate (2) is configured in a square frame shape, and the rotating plate (9) is rotatably mounted on the inner side of the top plate (2).

8. An elevator ventilation system according to claim 7, characterized in that: The locking mechanism (92) includes a clearance opening (924) formed on the rotating plate (9), a push plate (923) being installed on the inner side of the clearance opening (924), an inserting plate (921) being fixed on the upper end of the push plate (923) and moving forward and inserted on the inner side wall of the top plate (2), and a guide sleeve (922) being fixed on the rotating plate (9) for guiding the movement of the inserting plate (921).

9. The elevator ventilation system according to claim 1, characterized in that: The air guide duct (10) is provided with sleeve holes (101) near both ends, and the air guide duct (10) is connected to the hot air duct (6) and the air outlet (12) respectively through the two sleeve holes (101). A plurality of evenly distributed mounting plates (102) are fixed to the outside of the air guide duct (10).

10. The method for using an elevator ventilation system according to claim 1, characterized in that The following steps are involved: S1: During ventilation, the cooling side of the semiconductor refrigeration plate uses the cooling fins to cool the lower part of the heat exchange box, while the heating side uses the heat dissipation fins to dissipate heat to the upper part of the heat exchange box; S2: When the elevator car stops at a certain floor, the heat exchanger box is connected to the cold air duct and the connecting pipe. At this time, the outside air enters the cold air duct through the filter box and the connecting pipe. The cold air duct sends the air into the cold air duct in the heat exchanger box. The air in the cold air duct flows to the left and right and is blown into the elevator car through the air supply pipe and the blower fan to replenish fresh air. S3: The exhaust fan in the elevator car draws away the exhaust air in the elevator car and sends it to the hot air pipe through the air duct. The hot air pipe then sends the air to the heating part of the heat exchanger. The incoming air flows to the left and right sides through the hot air duct and is discharged into the elevator shaft through the heat dissipation port. Finally, it is discharged through the exhaust fan at the top of the elevator shaft, thus completing the ventilation and cooling of the elevator car. S4: When inspecting the heat exchanger box and the blower mechanism, the winding wire rope is paid out using a winch, and the top plate is lowered until it is convenient for maintenance personnel to carry out inspection work; S5: Then detent the push plates on the two locking mechanisms to move the two insert plates away from the top plate, thereby rotating the rotating plate downward, so that the heat exchange box and the blower mechanism are exposed to the maintenance personnel, so that maintenance operations can be carried out.

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