A heating ventilation air conditioner waste heat recovery device

Abstract

The present application relates to a waste heat recovery device technical field, specifically to a kind of heating ventilation air conditioner waste heat recovery device, including air conditioner body, the discharge pipe of air conditioner body is equipped with cyclone dust collector, the lower end of cyclone dust collector is equipped with blowdown tank, the upper end of cyclone dust collector is fixedly connected with buffer tank, the outside of buffer tank is equipped with first motor, the inside lower position of buffer tank is equipped with filter heat exchange mechanism for intercepting airflow particulate matter, the inside upper position of buffer tank is equipped with air distribution flow mechanism for controlling hot gas flow, buffer tank inner wall heat exchange surface is synchronized to the low-grade heat energy recovery of airflow after multistage purification, and the clean waste heat airflow after purification can be directionally transported to mine shaft freezing prevention heating system, underground operation face and mine area ground building, replace traditional coal-fired, gas boiler to complete heating and domestic hot water preparation, realize safe and environmental energy conversion.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery devices, specifically a waste heat recovery device for heating, ventilation, and air conditioning systems. Background Technology

[0002] With the increasing demands for safe production and energy conservation in mines, higher requirements are being placed on the integration and efficiency of waste heat recovery from exhaust air (return air) and shaft anti-freezing heating systems in mines. As the core energy-saving unit of both the mine ventilation system and the shaft anti-freezing heating system, the waste heat recovery efficiency and operational stability of the mine exhaust air waste heat recovery device directly affect mine ventilation safety, heating security, and energy utilization efficiency. Traditional mine HVAC waste heat recovery technologies face the following technical bottlenecks.

[0003] In mining applications, exhaust air contains not only large-particle dust and condensation droplets, but also corrosive components, leading to pipe corrosion, scale buildup on heat exchange surfaces, and even affecting the normal operation of the mine's HVAC system and core heating components. Simultaneously, the filter components of existing waste heat recovery devices are prone to clogging due to pollutant accumulation, requiring frequent manual disassembly and cleaning, resulting in high maintenance costs and reduced system efficiency. Regarding flow regulation, traditional devices often employ fixed-path designs, failing to flexibly adjust waste heat airflow distribution according to different operating conditions such as shaft antifreeze, underground working face heating, and mine building heating, leading to low waste heat energy recovery and utilization rates. Existing waste heat recovery structures do not utilize the kinetic energy of the diverted airflow, resulting in energy waste. Furthermore, the complex mining environment allows water vapor in the exhaust air to condense on the inner walls of heat exchange pipes, causing corrosion and scale buildup, shortening equipment lifespan. Existing devices lack targeted anti-scaling and anti-corrosion mechanisms and long-term protection, making it difficult to meet long-term stable operation requirements. Therefore, we propose a waste heat recovery device for HVAC systems. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a waste heat recovery device for heating, ventilation and air conditioning.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a waste heat recovery device for HVAC, including an air conditioning unit, a cyclone dust collector installed on the exhaust pipe of the air conditioning unit, a sludge box installed at the lower end of the cyclone dust collector, a buffer tank fixedly connected to the upper end of the cyclone dust collector, a first motor installed on the outside of the buffer tank, a filter heat exchange mechanism for intercepting airflow particles installed at the lower inner side of the buffer tank, an air distribution flow mechanism for controlling the flow of hot air installed at the upper inner side of the buffer tank, an electromagnetic dust collection plate fixedly connected at the middle position of the inner side of the buffer tank, a heat exchange surface provided on the inner wall of the buffer tank, and a temperature and humidity sensor installed on the inner side of the buffer tank.

[0006] Preferably, the filtration heat exchange mechanism includes a cleaning component for cleaning the filter screen, and the filtration heat exchange mechanism also includes a gas separation component for diverting gas.

[0007] Preferably, the cleaning assembly includes a retaining ring rotatably connected to the inner wall of the buffer tank. A toothed ring is fixedly connected to the lower end of the retaining ring, and a first gear is meshed with the outer side of the toothed ring. One end of the first gear is fixedly connected to the output shaft of a first motor. A cross-shaped sweeping rod is fixedly connected to the inner wall of the retaining ring, and a rotating bearing is fixedly connected to the inner side of the cross-shaped sweeping rod. An electromagnetic dust collection plate passes through the outer side of the rotating bearing. An I-shaped rod is fixedly connected to the upper end of the rotating bearing, and two mutually symmetrical movable frames are slidably connected to the outer side of the I-shaped rod. A retaining tooth is provided at the lower end of the I-shaped rod.

[0008] Preferably, a second gear is rotatably connected to the inner side of the movable frame via a rotating shaft. The outer side of the second gear meshes with the teeth of the I-shaped rod. Both ends of the second gear are fixedly connected to a sweeping plate. The outer side of the sweeping plate is provided with a brush adapted to the filter holes. The inner wall of the movable frame is provided with two symmetrical rollers. The outer side of the rollers is slidably connected to the groove of the I-shaped rod. An industrial camera is installed at the lower end of the movable frame. A second motor is installed on one side of the movable frame. A third gear is fixedly connected to the output shaft of the second motor. The outer side of the third gear meshes with the second gear.

[0009] Preferably, the separation assembly includes a diversion tank fixedly connected to a buffer tank, an exhaust pipe fixedly connected to the outer side of the diversion tank, a cylinder installed at the upper end of the diversion tank, a pressure plate fixedly connected to the output shaft of the cylinder, a filter cartridge fixedly connected to the inner side of the diversion tank, the pressure plate slidingly connected to the inner wall of the filter cartridge, and the lower end of the diversion tank fixedly connected to a cyclone dust collector through a pipe.

[0010] Preferably, the lower end of the diversion tank is fixedly connected to two symmetrical U-shaped tubes. Hydraulic oil is provided inside the U-shaped tubes. A lifting rod is slidably connected to the inner side of the U-shaped tubes. The outer side of the lifting rod passes through the diversion tank. The upper end of the lifting rod is fixedly connected to a pressure plate. A lowering rod is slidably connected to the inner side of the U-shaped tubes. The outer side of the lowering rod passes through the diversion tank. A scraper is fixedly connected to the upper end of the lowering rod. The outer side of the scraper is slidably connected to the diversion tank. The inner wall of the scraper is slidably connected to the filter cartridge. A temperature-resistant and corrosion-resistant rubber sealing ring is provided at one end of the lifting rod and the lowering rod inside the U-shaped tube.

[0011] Preferably, the air distribution flow mechanism includes an air distribution regulating component for controlling the flow of waste heat air, and the air distribution flow mechanism also includes an anti-scaling coating component for maintaining the heat exchange surface.

[0012] Preferably, the air distribution regulating component includes at least two support plates fixedly connected to the buffer tank, a guide plate is fixedly connected to the lower end of the multiple support plates, a triangular plate is fixedly connected to multiple fulcrums of the guide plate, a guide cylinder is fixedly connected to the lower end of the guide plate, and multiple sets of guide grooves are opened below the upper triangular plate of the guide cylinder, and a square limiting groove is opened at the center of the guide groove.

[0013] Preferably, a dual-axis motor is installed inside the guide cylinder. The lower output shaft of the dual-axis motor is fixedly connected to a rotating cylinder. Multiple fixed rotating shafts are rotatably connected to the inside of the rotating cylinder. Rubber sealing plates are fixedly connected to the ends of the multiple fixed rotating shafts that are far apart from each other. The multiple rubber sealing plates together form a circle. The outer side of the rubber sealing plate is in contact with the buffer tank. The inner wall of the rubber sealing plate is in contact with the rotating cylinder. An arc-shaped clamp is fixedly connected to the ends of the multiple fixed rotating shafts that are close to each other. The inner wall of the arc-shaped clamp is in contact with the guide cylinder. Two mutually symmetrical guide rods are rotatably connected to the inside of the arc-shaped clamp. The guide rods are slidably connected to the inside of the groove formed between the guide plate and the guide cylinder.

[0014] Preferably, the anti-scaling coating assembly includes a storage tank fixedly connected to a support plate. The inner side of the storage tank stores a hydrophilic anti-scaling coating liquid. A perforated tube is rotatably connected to the inner side of the storage tank. A stirring rod is fixedly connected to the inner side of the storage tank and the outer side of the perforated tube. An inlet is provided on the outer side of the perforated tube. The lower end of the perforated tube is fixedly connected to the output shaft of the upper end of a dual-shaft motor via a coupling. A solenoid valve spray head is installed at the upper end of the storage tank. The lower end of the solenoid valve spray head is fixedly connected to the perforated tube. Multiple scrapers are fixedly connected to the outer side of the housing of the solenoid valve spray head. The outer side of the scrapers is slidably connected to the heat exchange surface of the buffer tank.

[0015] Compared with the prior art, the present invention provides a waste heat recovery device for HVAC systems, which has the following beneficial effects: 1. The cyclone dust collector initially separates large-diameter dust particles and condensed droplets through centrifugal separation. The electromagnetic dust collection plate discharges and adsorbs fine particulate matter in the airflow. The filter cartridge further traps particulate matter to complete deep purification. The heat exchange surface on the inner wall of the buffer tank simultaneously recovers low-grade heat energy from the multi-stage purified airflow. The purified clean waste heat airflow can be directionally transported to the mine shaft anti-freezing heating system, underground working face, and surface buildings in the mining area, replacing traditional coal-fired and gas-fired boilers to complete heating and domestic hot water preparation, achieving safe and environmentally friendly energy conversion. At the same time, the rubber sealing plate of the air distribution regulating component precisely controls the flow rate and path of the waste heat airflow by rotating the angle, adapting to the waste heat demand of different heating conditions such as shaft anti-freezing and mine heating, improving the efficiency of waste heat recovery and utilization, thereby realizing multi-stage purification and synergistic waste heat recovery, replacing traditional heating equipment to complete diversified clean heating.

[0016] 2. Through the integrated design of the filtration and heat exchange mechanism, air flow distribution mechanism, and buffer tank, airflow purification, waste heat recovery, flow control, heat exchange surface maintenance, and directional utilization of waste heat are integrated into a single equipment system. After the waste heat from the air conditioning return air is recovered by the buffer tank, the clean waste heat airflow can be directly delivered to each heat-using end through the exhaust pipe, eliminating the need for additional waste heat transfer and transportation equipment, thus achieving a seamless connection between "waste heat-recovery-utilization". At the same time, the kinetic energy of the upward airflow is transferred to the heat exchange area, realizing the secondary utilization of waste heat recovery energy, further improving the overall energy utilization rate. This integrated architecture simplifies system design, reduces one-time equipment investment, and improves energy utilization efficiency.

[0017] 3. The cleaning component uses a first motor to drive a cross-shaped sweeper to clean the electromagnetic dust collection plate in a circular motion. A second motor drives a moving frame to move linearly, precisely unclogging the filter holes. An industrial camera monitors the blockage status in real time and dynamically adjusts the speed of the first motor to match the cleaning intensity. The cylinder of the separation component, in conjunction with the U-shaped tube hydraulic transmission, achieves backflushing self-cleaning of the filter cartridge, preventing clogging of the filter components from all directions. At the same time, the electromagnetic valve spray head of the anti-scaling coating component sprays a hydrophilic anti-scaling coating onto the heat exchange surface of the buffer tank. The scraper removes residues from the heat exchange surface in real time, preventing condensation, scaling, and corrosion, and extending the service life of the heat exchange surface and core components. All cleaning and protection components operate automatically, reducing the frequency of manual inspection and disassembly maintenance. This achieves a multi-dimensional self-cleaning and long-term protection synergy, ensuring long-term stable and efficient operation of the equipment and significantly reducing operating and maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the separation mechanism and adjustment mechanism of the present invention; Figure 3 This is a cross-sectional schematic diagram of the overall structure of the separation mechanism of the present invention; Figure 4 This is a cross-sectional view of a portion of the cleaning component of the present invention. Figure 1 ; Figure 5 This is a cross-sectional view of a portion of the cleaning component of the present invention. Figure 2 ; Figure 6 This is a cross-sectional view of a portion of the cleaning component of the present invention. Figure 3 ; Figure 7 This is a cross-sectional schematic diagram of the overall structure of the separation component of the present invention; Figure 8 This is a schematic diagram of the overall structure of the adjustment mechanism of the present invention; Figure 9 This is a cross-sectional schematic diagram of the overall structure of the adjustment mechanism of the present invention; Figure 10This is a schematic diagram of the flow component structure of the present invention; Figure 11 This is a cross-sectional schematic diagram of a portion of the adjusting mechanism of the present invention; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of part A in the middle.

[0019] In the diagram: 1. Air conditioner body; 2. Cyclone dust collector; 3. Buffer tank; 4. First motor; 5. Filter heat exchange mechanism; 51. Cleaning assembly; 511. Snap ring; 512. Gear ring; 513. First gear; 514. Cross sweep bar; 515. Rotary bearing; 516. I-beam; 517. Moving frame; 518. Second gear; 519. Roller; 5110. Sweeping plate; 5111. Second motor; 5112. Third gear; 5113. Industrial camera; 52. Separation assembly; 521. Diverter tank; 522. Exhaust pipe; 523. Cylinder; 524. 525. Pressure plate; 526. Filter cartridge; 527. U-shaped tube; 528. Lifting rod; 529. Lowering rod; 6. Scraper; 6. Airflow distribution mechanism; 61. Air distribution adjustment assembly; 611. Support plate; 612. Guide plate; 613. Guide cylinder; 614. Dual-shaft motor; 615. Rotary drum; 616. Fixed rotating shaft; 617. Rubber sealing plate; 618. Arc-shaped clamping plate; 619. Guide rod; 62. Anti-scaling coating assembly; 621. Liquid storage tank; 622. Hollowed-out tube; 623. Stirring rod; 624. Solenoid valve spray head; 625. Scraper; 7. Electromagnetic dust collection plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] The following electrical components are all electrically connected via an external PLC controller.

[0022] Please see Figures 1-12 A waste heat recovery device for HVAC includes an air conditioning unit 1, a cyclone dust collector 2 installed on the exhaust pipe of the air conditioning unit 1, a sludge box installed at the lower end of the cyclone dust collector 2, a buffer tank 3 fixedly connected to the upper end of the cyclone dust collector 2, a first motor 4 installed on the outside of the buffer tank 3, a filter heat exchange mechanism 5 for intercepting airflow particles installed at the lower inner side of the buffer tank 3, an air distribution flow mechanism 6 for controlling the flow of hot air installed at the upper inner side of the buffer tank 3, an electromagnetic dust collection plate 7 fixedly connected at the middle position of the inner side of the buffer tank 3, a heat exchange surface provided on the inner wall of the buffer tank 3, and a temperature and humidity sensor installed on the inner side of the buffer tank 3.

[0023] In this embodiment, the filtration heat exchange mechanism 5 includes a cleaning component 51 for cleaning the filter screen, and the filtration heat exchange mechanism 5 also includes a gas separation component 52 for diverting gas.

[0024] Specifically, the filtration and heat exchange mechanism 5 dynamically cleans the electromagnetic dust collection plate 7 through the cleaning component 51 to prevent filter pore blockage, and at the same time, it uses the separation component 52 to divert and backwash the airflow for self-cleaning, thereby achieving the synergistic effect of airflow purification and waste heat recovery.

[0025] In this embodiment, the cleaning component 51 includes a retaining ring 511 rotatably connected to the inner wall of the buffer tank 3. A toothed ring 512 is fixedly connected to the lower end of the retaining ring 511. A first gear 513 is meshed with the outer side of the toothed ring 512. One end of the first gear 513 is fixedly connected to the output shaft of the first motor 4. A cross-shaped sweeping bar 514 is fixedly connected to the inner wall of the retaining ring 511. A rotating bearing 515 is fixedly connected to the inner side of the cross-shaped sweeping bar 514. An electromagnetic dust collection plate 7 passes through the outer side of the rotating bearing 515. An I-shaped rod 516 is fixedly connected to the upper end of the rotating bearing 515. Two mutually symmetrical movable frames 517 are slidably connected to the outer side of the I-shaped rod 516. A retaining tooth is provided at the lower end of the I-shaped rod 516.

[0026] Specifically, the retaining ring 511 is used to support the gear ring 512 and the cross-shaped sweeping rod 514, enabling them to revolve along the inner wall of the buffer tank 3; the gear ring 512 meshes with the first gear 513, converting the power of the first motor 4 into the rotational motion of the retaining ring 511; the first gear 513 acts as a transmission component, transmitting the output torque of the first motor 4; the cross-shaped sweeping rod 514 is used to perform a circumferential cleaning of the dust-facing surface of the electromagnetic dust collection plate 7; the rotating bearing 515 is used to connect the cross-shaped sweeping rod 514 and the I-shaped rod 516, preventing hard friction between the electromagnetic dust collection plate 7 and the I-shaped rod 516; the I-shaped rod 516 is used to support the moving frame 517, and through the retaining teeth, it engages with the second gear 518 to achieve linear movement of the moving frame 517; the moving frame 517 is used to install the second gear 518, the sweeping plate 5110, the roller 519, the industrial camera 5113, and the second motor 5111, achieving precise cleaning and status monitoring of the electromagnetic dust collection plate 7.

[0027] In this embodiment, the inner side of the movable frame 517 is rotatably connected to a second gear 518 via a rotating shaft. The outer side of the second gear 518 is meshed with the teeth of the I-shaped rod 516. Both ends of the second gear 518 are fixedly connected to a sweeping plate 5110. The outer side of the sweeping plate 5110 is provided with a brush adapted to the filter holes. The inner wall of the movable frame 517 is provided with two symmetrical rollers 519. The outer side of the rollers 519 is slidably connected to the groove of the I-shaped rod 516. An industrial camera 5113 is installed at the lower end of the movable frame 517. A second motor 5111 is installed on one side of the movable frame 517. The output shaft of the second motor 5111 is fixedly connected to a third gear 5112. The outer side of the third gear 5112 is meshed with the second gear 518.

[0028] Specifically, the second gear 518 meshes with the teeth of the I-shaped rod 516, converting the power of the second motor 5111 into the linear movement of the moving frame 517, while simultaneously driving the sweeping plate 5110 to rotate. The sweeping plate 5110 uses a brush to precisely unclog the filter holes of the electromagnetic dust collection plate 7, improving filtration efficiency. The roller 519 is used to reduce the resistance when the moving frame 517 moves along the I-shaped rod 516, ensuring smooth movement. The industrial camera 5113 is used to monitor the clogging status of the electromagnetic dust collection plate 7 in real time, providing a basis for adjusting the cleaning intensity. The second motor 5111, as a power source, drives the second gear 518 to rotate through the third gear 5112. The third gear 5112 is used to transmit the torque of the second motor 5111, driving the second gear 518 to operate.

[0029] In this embodiment, the separation component 52 includes a diversion tank 521 fixedly connected to the buffer tank 3. An exhaust pipe 522 is fixedly connected to the outside of the diversion tank 521. A cylinder 523 is installed at the upper end of the diversion tank 521. A pressure plate 524 is fixedly connected to the output shaft of the cylinder 523. A filter cartridge 525 is fixedly connected to the inside of the diversion tank 521. The pressure plate 524 is slidably connected to the inner wall of the filter cartridge 525. The lower end of the diversion tank 521 is fixedly connected to the cyclone dust collector 2 through a pipe.

[0030] Specifically, the diversion tank 521 is used to accommodate the filter cartridge 525 and realize airflow diversion; the exhaust pipe 522 is used to output the clean airflow purified by the filter cartridge 525; the cylinder 523 serves as a power source to drive the pressure plate 524 to move up and down; the pressure plate 524 is used to scrape off the dirt on the inner wall of the filter cartridge 525 and, together with the scraper 529, realize the backwashing and dust removal of the filter cartridge 525; the filter cartridge 525 is used to intercept particulate matter in the airflow again and improve the cleanliness of the airflow.

[0031] In this embodiment, two symmetrical U-shaped tubes 526 are fixedly connected to the lower end of the diversion tank 521. Hydraulic oil is provided inside the U-shaped tubes 526. A lifting rod 527 is slidably connected to the inner side of the U-shaped tubes 526. The outer side of the lifting rod 527 passes through the diversion tank 521. The upper end of the lifting rod 527 is fixedly connected to the pressure plate 524. A lowering rod 528 is slidably connected to the inner side of the U-shaped tubes 526. The outer side of the lowering rod 528 passes through the diversion tank 521. A scraper 529 is fixedly connected to the upper end of the lowering rod 528. The outer side of the scraper 529 is slidably connected to the diversion tank 521. The inner wall of the scraper 529 is slidably connected to the filter cartridge 525. A temperature-resistant and corrosion-resistant rubber sealing ring is provided at one end of the lifting rod 527 and the lowering rod 528 inside the U-shaped tube 526.

[0032] Specifically, the U-shaped tube 526 is used to contain hydraulic oil to realize hydraulic transmission between the pressure plate 524 and the scraper 529; the lifting rod 527 is used to convert the downward movement of the pressure plate 524 into pressure changes of the hydraulic oil in the U-shaped tube 526; the lowering rod 528 is used to drive the scraper 529 to move upward under the action of hydraulic oil pressure; the scraper 529 is used to cooperate with the pressure plate 524 to change the airflow path and realize the backwashing self-cleaning of the filter cartridge 525. The lifting rod 527 and the lowering rod 528 are equipped with a temperature-resistant and corrosion-resistant rubber sealing ring at one end inside the U-shaped tube 526 for sealing.

[0033] In this embodiment, the air distribution flow mechanism 6 includes an air distribution adjustment component 61 for controlling the flow of waste heat air, and the air distribution flow mechanism 6 also includes an anti-scaling coating component 62 for maintaining the heat exchange surface.

[0034] Specifically, the air distribution mechanism 6 precisely controls the flow rate and path of the waste heat airflow through the air distribution adjustment component 61 to optimize the waste heat recovery efficiency. At the same time, the heat exchange surface is sprayed and cleaned through the anti-scaling coating component 62 to extend the service life of the heat exchange surface.

[0035] In this embodiment, the air distribution adjustment component 61 includes at least two support plates 611 fixedly connected to the buffer tank 3. The lower ends of the multiple support plates 611 are fixedly connected to a guide plate 612. Triangular plates are fixedly connected to multiple fulcrums of the guide plate 612. A guide cylinder 613 is fixedly connected to the lower end of the guide plate 612. Multiple sets of guide grooves are opened below the upper triangular plate of the guide cylinder 613. A square limiting groove is opened at the center of the guide groove.

[0036] Specifically, the support plate 611 is used to support the guide plate 612 and the liquid storage tank 621 to ensure structural stability; the guide plate 612 is used to provide the sliding path of the guide rod 619 and to guide the guide rod 619 through the triangular plate; the guide cylinder 613 is used to install the dual-axis motor 614 and to limit the movement trajectory of the guide rod 619 through the guide groove and the square limiting groove, so as to realize the angle adjustment of the rubber sealing plate 617.

[0037] In this embodiment, a dual-axis motor 614 is installed on the inner side of the guide cylinder 613. The lower output shaft of the dual-axis motor 614 is fixedly connected to a rotating cylinder 615. Multiple fixed rotating shafts 616 are rotatably connected to the inner side of the rotating cylinder 615. Rubber sealing plates 617 are fixedly connected to the ends of the multiple fixed rotating shafts 616 that are far apart. The multiple rubber sealing plates 617 together form a circle. The outer side of the rubber sealing plate 617 is in contact with the buffer tank 3. The inner wall of the rubber sealing plate 617 is in contact with the rotating cylinder 615. Arc-shaped clamps 618 are fixedly connected to the ends of the multiple fixed rotating shafts 616 that are close to each other. The inner wall of the arc-shaped clamps 618 is in contact with the guide cylinder 613. Two mutually symmetrical guide rods 619 are rotatably connected to the inner side of the arc-shaped clamps 618. The guide rods 619 are slidably connected to the inner side of the groove formed between the guide plate 612 and the guide cylinder 613.

[0038] Specifically, the dual-axis motor 614 serves as the power source, simultaneously driving the rotating drum 615 and the hollow tube 622 to rotate; the rotating drum 615 is used to support the fixed rotating shaft 616 and the rubber sealing plate 617, realizing rotational motion; the fixed rotating shaft 616 is used to connect the rubber sealing plate 617 and the arc-shaped clamping plate 618 to transmit motion; the rubber sealing plate 617 is used to control the air intake flow and airflow path by rotating the angle, and the rubber material adapts to spatial changes to ensure the sealing effect; the arc-shaped clamping plate 618 is used to support the guide rod 619 and move along the guide cylinder 613, causing the fixed rotating shaft 616 to deflect; the guide rod 619 is used to slide in the guide groove, driving the fixed rotating shaft 616 and the rubber sealing plate 617 to rotate.

[0039] In this embodiment, the anti-scaling coating assembly 62 includes a storage tank 621 fixedly connected to the support plate 611. The inner side of the storage tank 621 stores a hydrophilic anti-scaling coating liquid. A perforated tube 622 is rotatably connected to the inner side of the storage tank 621. A stirring rod 623 is fixedly connected to the outer side of the perforated tube 622 inside the storage tank 621. An inlet is opened on the outer side of the perforated tube 622. The lower end of the perforated tube 622 is fixedly connected to the output shaft of the upper end of the dual-shaft motor 614 through a coupling. A solenoid valve spray head 624 is installed on the upper end of the storage tank 621. The lower end of the solenoid valve spray head 624 is fixedly connected to the perforated tube 622. Multiple scrapers 625 are fixedly connected to the outer side of the housing of the solenoid valve spray head 624. The outer side of the scrapers 625 is slidably connected to the heat exchange surface of the buffer tank 3.

[0040] Specifically, the storage tank 621 is used to store the hydrophilic anti-scaling coating liquid; the perforated tube 622 is used to transmit the power of the dual-shaft motor 614 to drive the stirring rod 623 and the solenoid valve spray head 624 to rotate, and to deliver the coating liquid through the liquid inlet; the stirring rod 623 is used to stir the coating liquid to prevent sedimentation; the solenoid valve spray head 624 is used to spray the hydrophilic anti-scaling coating onto the heat exchange surface to prevent condensation, scaling and corrosion; the scraper 625 is used to scrape off the residue on the inner wall of the buffer tank 3 to keep the heat exchange surface clean.

[0041] Working principle: During use, the air conditioner return air is discharged through the air conditioner body 1 to the cyclone dust collector 2. The cyclone dust collector 2 performs preliminary centrifugal separation to remove large-diameter dust and condensation droplets, realizing airflow pretreatment and avoiding subsequent scaling and clogging of the heat exchange surface, laying the foundation for efficient waste heat recovery. Then the airflow enters the buffer tank 3, and the electromagnetic dust collection plate 7 is activated to discharge and adsorb fine particulate matter in the airflow, further purifying the airflow. At this time, based on the feedback from the air pressure and temperature and humidity sensors, the cleaning component 51 is activated to ensure filtration and heat exchange efficiency. First, the first motor 4 is started to drive the first gear 513 to rotate. The first gear 513 meshes with the gear ring 512, causing the gear ring 512 to drive the retaining ring 511 to rotate stably along the inner wall of the buffer tank 3. The retaining ring 511 drives the cross sweeper 514 to move synchronously, so that the cross sweeper 514 can perform a comprehensive circumferential cleaning of the dust-facing surface of the electromagnetic dust collection plate 7. At the same time, the cross sweeper 514 drives the I-shaped rod 516 to rotate synchronously through the rotating bearing 515, avoiding hard friction between the electromagnetic dust collection plate 7 and the I-shaped rod 516 and ensuring smooth transmission. The second motor 5111 is started, and its output shaft drives the second gear 518 to rotate through the third gear 5112. The second gear 518 meshes with the teeth of the I-shaped rod 516, causing the moving frame 517 to move linearly along the I-shaped rod 516. The movement of the moving frame 517, in conjunction with the revolution of the I-shaped rod 516, allows the industrial camera 5113 carried by the moving frame 517 to monitor the clogging status of the electromagnetic dust collection plate 7 in real time, and dynamically adjust the operating speed of the first motor 4 accordingly to match the cleaning intensity. The roller 519 reduces the resistance when the moving frame 517 moves. When the second gear 518 rotates, it synchronously drives the sweeping plate 5110 to rotate, precisely unclogging the filter holes of the electromagnetic dust collection plate 7 and improving the filtration and heat exchange efficiency. The cleaned particles fall into the cyclone dust collector 2 and are discharged into the sewage box along with the larger particles, avoiding secondary pollution. After filtration and purification, part of the airflow enters the space of the separation component 52. The airflow then passes through the filter cartridge 525, where particulate matter is again trapped, forming a clean, low-dust airflow. This clean airflow can be directed and utilized according to the actual needs of the mine: On one hand, the clean airflow can be directly connected to the mine shaft anti-freeze heating system, exchanging heat with the fresh air in the shaft through heat exchange coils to prevent the shaft from freezing in winter, ensuring mine ventilation safety and replacing traditional coal / gas boiler heating; on the other hand, the clean airflow can be transported to the mine's underground working face as a source of heating or air conditioning, improving the temperature and humidity of the underground working environment. Simultaneously, part of the clean airflow can be diverted to the mine's surface building heating system and domestic hot water preparation system, transferring waste heat through heat exchange media to heat buildings such as mine office buildings and dormitories and prepare domestic hot water, achieving cascade utilization of waste heat. When the filtration effect of the filter cartridge 525 decreases, cylinder 52 is activated. 3. Its output shaft drives the pressure plate 524 to move downward, scraping off the dirt on the inner wall of the filter cartridge 525, allowing the dirt to fall through the pipe to the cyclone dust collector 2; when the pressure plate 524 moves downward, it drives the lifting rod 527 to move downward, and the lifting rod 527 presses down the hydraulic oil in the U-shaped tube 526, which drives the lowering rod 528 to move upward through the oil pressure, and the lowering rod 528 drives the scraper 529 to rise; the scraper 529 divides the space in the diversion tank 521 into two parts. The upward air is blocked by the pressure plate 524 and outputs to the outside of the filter cartridge 525, but is blocked by the scraper 529 and cannot be discharged from the exhaust pipe 522, so that the air enters the interior of the filter cartridge 525 from the outside, realizing backflushing and dust removal, so that particulate matter is completely removed and self-cleaning is achieved; after cleaning is completed, the separation component 52 is reset, so that the exhaust pipe 522 continues to discharge, and continues to deliver clean airflow to each energy / air-using end of the mine, ensuring the continuity of waste heat utilization; After being filtered by the electromagnetic dust collection plate 7, the main airflow flows upward through the buffer tank 3. The airflow makes full contact with the heat exchange surface of the inner wall of the buffer tank 3, achieving efficient recovery of waste heat from the return air and providing support for the core functions of energy-saving air conditioners and energy-saving heat exchange devices. The dual-shaft motor 614 is started, and its lower output shaft drives the rotating drum 615 to rotate. The rotating drum 615 drives the fixed rotating shaft 616 to rotate, and the fixed rotating shaft 616 drives the arc-shaped clamping plate 618 to move along the guide cylinder 613. The support plate 611 is used to support the guide plate 612 and the guide cylinder 613, fixing their positions. The rotating drum 615 drives the guide rod 619 to move along the groove between the guide plate 612 and the guide cylinder 613. The guide rod 619 first contacts the triangular plate, and then moves according to the triangular plate's guidance and direction. The limiting position of cylinder 613 causes guide rod 619 to drive fixed rotating shaft 616 to rotate and deflect, and drives rubber sealing plate 617 to move synchronously; arc-shaped clamp 618 continues to move to square limiting groove, at which point arc-shaped clamp 618 rotates 90 degrees from horizontal to vertical, and rubber sealing plate 617 simultaneously turns vertical, so that airflow enters the heat exchange zone in a straight upward direction. By controlling the rotation angle of rubber sealing plate 617, the air intake flow and airflow path are precisely controlled, adapting to the waste heat needs of different scenarios such as mine shaft antifreeze, working face heating, and building heating, and optimizing waste heat recovery efficiency; the rubber material design of rubber sealing plate 617 is used to adapt to spatial changes during rotation, ensuring sealing effect and avoiding airflow leakage that affects energy-saving effect; A small amount of dust particles still exist in the airflow. The upper output shaft of the dual-shaft motor 614 drives the perforated tube 622 to rotate inside the liquid storage tank 621. The perforated tube 622 drives the stirring rod 623 to stir the hydrophilic anti-scaling coating liquid in the liquid storage tank 621 to prevent the coating liquid from settling. The perforated tube 622 drives the solenoid valve spray head 624 to spray the gap between the rotating drum 615 and the buffer tank 3. The solenoid valve spray head 624 sprays the hydrophilic anti-scaling coating onto the heat exchange surface to prevent condensation, scaling, and corrosion, and to extend the service life of the heat exchange surface. The sprayed liquid flows downward, flushing against the upward-moving particles, accelerating the particles to fall off, and can also pass through the sprayed liquid. The body cleans the rubber sealing plate 617; the rubber sealing plate 617 can rotate, so both sides of the rubber sealing plate 617 can be cleaned to keep it clean and avoid affecting the air distribution and heat exchange effect; the casing of the solenoid valve spray head 624 drives the scraper 625 to scrape off the residue on the inner wall of the buffer tank 3, and keeps it clean under the blowing of the airflow, so that the dirt falls downward onto the rubber sealing plate 617. When the rubber sealing plate 617 rotates, the dirt falls to the bottom and is treated by the cleaning plate 5110; the kinetic energy of the upward airflow is transferred to the heat exchange area to realize the secondary utilization of waste heat recovery energy and further improve the energy-saving effect of the device.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for heating, ventilation, and air conditioning systems, comprising an air conditioning unit (1), characterized in that: The air conditioner body (1) is equipped with a cyclone dust collector (2) on its exhaust pipe. A sewage box is installed at the lower end of the cyclone dust collector (2). A buffer tank (3) is fixedly connected to the upper end of the cyclone dust collector (2). A first motor (4) is installed on the outside of the buffer tank (3). A filter heat exchange mechanism (5) for intercepting airflow particles is installed at the lower inner side of the buffer tank (3). An air distribution flow mechanism (6) for controlling the flow of hot air is installed at the upper inner side of the buffer tank (3). An electromagnetic dust collection plate (7) is fixedly connected to the middle inner side of the buffer tank (3). A heat exchange surface is provided on the inner wall of the buffer tank (3). A temperature and humidity sensor is installed on the inner side of the buffer tank (3).

2. The HVAC waste heat recovery device according to claim 1, characterized in that: The filtration heat exchange mechanism (5) includes a cleaning component (51) for cleaning the filter screen, and the filtration heat exchange mechanism (5) also includes a separation component (52) for diverting gas.

3. The HVAC waste heat recovery device according to claim 2, characterized in that: The cleaning assembly (51) includes a retaining ring (511) rotatably connected to the inner wall of the buffer tank (3). A toothed ring (512) is fixedly connected to the lower end of the retaining ring (511). A first gear (513) is meshed with the outer side of the toothed ring (512). One end of the first gear (513) is fixedly connected to the output shaft of the first motor (4). A cross-shaped sweeping rod (514) is fixedly connected to the inner wall of the retaining ring (511). A rotating bearing (515) is fixedly connected to the inner side of the cross-shaped sweeping rod (514). An electromagnetic dust collection plate (7) passes through the outer side of the rotating bearing (515). An I-shaped rod (516) is fixedly connected to the upper end of the rotating bearing (515). Two mutually symmetrical moving frames (517) are slidably connected to the outer side of the I-shaped rod (516). A retaining tooth is provided at the lower end of the I-shaped rod (516).

4. The HVAC waste heat recovery device according to claim 3, characterized in that: The inner side of the movable frame (517) is rotatably connected to a second gear (518) via a rotating shaft. The outer side of the second gear (518) is meshed with the teeth of the I-shaped rod (516). Both ends of the second gear (518) are fixedly connected to a sweeping plate (5110). The outer side of the sweeping plate (5110) is provided with a brush adapted to the filter hole. The inner wall of the movable frame (517) is provided with two symmetrical rollers (519). The outer side of the rollers (519) is slidably connected to the groove of the I-shaped rod (516). An industrial camera (5113) is installed at the lower end of the movable frame (517). A second motor (5111) is installed on one side of the movable frame (517). The output shaft of the second motor (5111) is fixedly connected to a third gear (5112). The outer side of the third gear (5112) is meshed with the second gear (518).

5. A waste heat recovery device for HVAC systems according to claim 2, characterized in that: The separation assembly (52) includes a diversion tank (521) fixedly connected to the buffer tank (3). An exhaust pipe (522) is fixedly connected to the outside of the diversion tank (521). A cylinder (523) is installed at the upper end of the diversion tank (521). A pressure plate (524) is fixedly connected to the output shaft of the cylinder (523). A filter cartridge (525) is fixedly connected to the inside of the diversion tank (521). The pressure plate (524) is slidably connected to the inner wall of the filter cartridge (525). The lower end of the diversion tank (521) is fixedly connected to the cyclone dust collector (2) through a pipe.

6. A waste heat recovery device for HVAC systems according to claim 5, characterized in that: The lower end of the diversion tank (521) is fixedly connected to two symmetrical U-shaped tubes (526). Hydraulic oil is provided inside the U-shaped tubes (526). A lifting rod (527) is slidably connected to the inner side of the U-shaped tubes (526). The outer side of the lifting rod (527) penetrates the diversion tank (521). The upper end of the lifting rod (527) is fixedly connected to the pressure plate (524). A lowering rod is slidably connected to the inner side of the U-shaped tubes (526). (528) The outer side of the pressure rod (528) penetrates the diversion tank (521). The upper end of the pressure rod (528) is fixedly connected to a scraper (529). The outer side of the scraper (529) is slidably connected to the diversion tank (521). The inner wall of the scraper (529) is slidably connected to the filter cartridge (525). One end of the lifting rod (527) and the pressure rod (528) inside the U-shaped tube (526) is provided with a temperature-resistant and corrosion-resistant rubber sealing ring.

7. The HVAC waste heat recovery device according to claim 1, characterized in that: The air distribution flow mechanism (6) includes an air distribution adjustment component (61) for controlling the flow of waste heat air, and the air distribution flow mechanism (6) also includes an anti-scaling coating component (62) for maintaining the heat exchange surface.

8. A waste heat recovery device for HVAC systems according to claim 7, characterized in that: The air distribution adjustment component (61) includes at least two support plates (611) fixedly connected to the buffer tank (3). The lower ends of the multiple support plates (611) are fixedly connected to a guide plate (612). Triangular plates are fixedly connected to multiple fulcrums of the guide plate (612). A guide cylinder (613) is fixedly connected to the lower end of the guide plate (612). Multiple sets of guide grooves are opened below the upper triangular plate of the guide cylinder (613). A square limiting groove is opened at the center of the guide groove.

9. A waste heat recovery device for HVAC systems according to claim 8, characterized in that: A dual-axis motor (614) is installed inside the guide cylinder (613). The lower output shaft of the dual-axis motor (614) is fixedly connected to a rotating cylinder (615). Multiple fixed rotating shafts (616) are rotatably connected to the inner side of the rotating cylinder (615). A rubber sealing plate (617) is fixedly connected to one end of each of the multiple fixed rotating shafts (616) that is far apart from each other. The multiple rubber sealing plates (617) together form a circle. The outer side of the rubber sealing plate (617) is in contact with the buffer tank (3). The inner wall of the rubber sealing plate (617) is in contact with the rotating cylinder (615), and an arc-shaped clamp (618) is fixedly connected to one end of each of the multiple fixed rotating shafts (616). The inner wall of the arc-shaped clamp (618) is in contact with the guide cylinder (613). Two mutually symmetrical guide rods (619) are rotatably connected to the inner side of the arc-shaped clamp (618). The guide rods (619) are slidably connected to the inner side of the groove formed between the guide plate (612) and the guide cylinder (613).

10. A waste heat recovery device for HVAC systems according to claim 7, characterized in that: The anti-scaling coating assembly (62) includes a storage tank (621) fixedly connected to a support plate (611). The inner side of the storage tank (621) stores a hydrophilic anti-scaling coating liquid. A perforated tube (622) is rotatably connected to the inner side of the storage tank (621). A stirring rod (623) is fixedly connected to the inside of the storage tank (621) outside the perforated tube (622). An inlet is provided on the outer side of the perforated tube (622). The lower end of 622) is fixedly connected to the output shaft of the upper end of the dual-shaft motor (614) via a coupling. The upper end of the liquid storage tank (621) is equipped with a solenoid valve spray head (624). The lower end of the solenoid valve spray head (624) is fixedly connected to the hollow tube (622). Multiple scrapers (625) are fixedly connected to the outer side of the housing of the solenoid valve spray head (624). The outer side of the scrapers (625) is slidably connected to the heat exchange surface of the buffer tank (3).

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