Energy-saving type heating ventilation air conditioner waste heat recovery device

Abstract

The invention relates to the technical field of heating ventilation air conditioners, in particular to an energy-saving heating ventilation air conditioner waste heat recovery device which comprises a box body, a partition plate and a vertical plate are arranged in the box body, the vertical plate penetrates through the partition plate, the partition plate divides the interior of the box body into a first cavity and a second cavity, and a filter assembly, a flow guide frame and a first induced draft fan are arranged in the first cavity; a filtering assembly, a flow guide frame and a second induced draft fan are arranged in the second cavity, a heat recovery rotating wheel is arranged in the vertical plate, and a plurality of evenly-distributed partition plates are arranged on the surface of the heat recovery rotating wheel. The waste heat recovery device has the beneficial effects that waste heat discharged by the heating ventilation air conditioning system is recovered through the heat recovery rotating wheel which continuously rotates, the waste heat is transmitted to cold air entering the box body, meanwhile, the temperature of discharged gas is reduced, the utilization efficiency of energy is improved, energy consumption is reduced, and meanwhile, energy is saved. And the filtering assembly is arranged to filter air entering the first cavity and the second cavity, the air quality is guaranteed, and the using effect of the device is improved.

Description

Technical Field

[0001] The invention relates to the field of HVAC, and in particular to an energy-saving HVAC waste heat recovery device. Background Art

[0002] HVAC is a system or related equipment responsible for heating, ventilation and air conditioning. It is an indispensable device for heating in winter. HVAC usually uses a compressor to heat the air to produce warm air for heating.

[0003] After the HVAC is used, there is still waste heat and warm air in its pipes, which are usually discharged directly into the external environment. The discharge of this warm air into the environment not only causes the increase of the external temperature, which is not environmentally friendly, but also leads to the waste of energy in the warm air, which is not in line with the development concept of low-carbon and environmental protection.

[0004] To this end, the present invention proposes an energy-saving HVAC waste heat recovery device to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an energy-saving HVAC waste heat recovery device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an energy-saving HVAC waste heat recovery device, the energy-saving HVAC waste heat recovery device comprising: a box body, a partition and a vertical plate are arranged inside the box body, the vertical plate penetrates the partition, the partition divides the box body into a first chamber and a second chamber, a filter assembly, a guide frame and a first induced draft fan are arranged in the first chamber, and a filter assembly, a guide frame and a second induced draft fan are arranged in the second chamber;

[0007] A vertical plate, a heat recovery wheel is arranged inside the vertical plate, a plurality of evenly distributed partition plates are arranged on the surface of the heat recovery wheel, a penetration zone is formed between two adjacent partition plates, and a honeycomb-shaped penetration hole is opened on the surface of the penetration zone.

[0008] Preferably, the heat recovery wheel is formed of two upper and lower air channels by a partition, and the two air channels are respectively located in the first chamber and the second chamber, and air can pass through the honeycomb-shaped penetration holes. The heat recovery wheel is made of a metal with high thermal conductivity such as aluminum, and a first air outlet, a first air inlet, a second air outlet and a second air inlet are provided on the surface of the box body. The first air outlet and the first air inlet are both communicated with the first chamber, and the second air outlet and the second air inlet are both communicated with the second chamber.

[0009] Preferably, the surface of the vertical plate is hollowed out, the cross-section of the hollowed-out portion is circular, the heat recovery wheel is located in the hollowed-out portion, a sliding bar is provided on the inner wall of the hollowed-out portion of the vertical plate, a sliding groove is provided on the outer wall of the heat recovery wheel, and the sliding groove and the sliding bar are slidably connected.

[0010] Preferably, a rotating shaft is fixed at the center of the surface of the heat recovery wheel, both ends of the rotating shaft are rotatably connected to the partition, a driven sprocket is fixed on the surface of the rotating shaft, an inner cavity is opened on the surface of the partition, the rotating shaft and the driven sprocket are located in the inner cavity, and the inner cavity extends to the surface of the box.

[0011] Preferably, a motor and a transmission shaft are provided on the outside of the box body, the motor is fixed in a first seat frame, the first seat frame is fixed to the surface of the box body by bolts, the motor is located below the inner cavity, both ends of the transmission shaft are rotatably connected to the second seat frame, a first transmission sprocket and a second transmission sprocket are fixed on the transmission shaft, and a driving sprocket is fixed on the output end of the motor.

[0012] Preferably, the driving sprocket and the first transmission sprocket are connected by a first chain, the second transmission sprocket is located outside the inner cavity, the second transmission sprocket and the driven sprocket are connected by a second chain, a sealing plate is provided at the inner cavity, the sealing plate is in the shape of a square plate, a square groove is provided on the surface of the sealing plate, the second chain passes through the square groove, and the sealing plate is fixed to the surface of the box by bolts.

[0013] Preferably, the filter assembly includes a supporting plate, which is in the shape of a square plate, and the outer walls of the supporting plate respectively contact and slide with the outer wall of the partition and the inner wall of the box, a filter plate is arranged on the surface of the supporting plate, and the surface of the filter plate is provided with filter holes distributed in a matrix shape, a square plate is fixed at the end face of the supporting plate, a handle is fixed on the surface of the square plate, and rubber pads are fixed on the inner and outer surfaces of the handle.

[0014] Preferably, side ears are fixed on both sides of the square plate, a guide rod is fixed to one end of the side ear, a limit plate is fixed to the other end of the side ear, a chassis is fixed at the end of the guide rod, the cross-sectional diameter of the chassis is larger than the cross-sectional diameter of the guide rod, and a plurality of evenly distributed movable balls are arranged on the outer wall of the chassis.

[0015] Preferably, the box body and the partition are both provided with an inner groove, the outer wall of the box body is provided with a through hole, the through hole and the inner groove are communicated, the chassis is located in the inner groove, the outer wall of the chassis contacts and slides with the inner wall of the inner groove, the outer wall of the guide rod contacts and slides with the inner wall of the through hole, a plurality of evenly distributed ball grooves are provided on the inner wall of the inner groove, and the movable balls are located in the ball grooves and are arranged to roll.

[0016] Preferably, in the first chamber, the filter assembly is located next to the first air inlet, the first induced draft fan is located next to the filter assembly, and the guide frame is located between the vertical plate and the first induced draft fan; in the second chamber, the filter assembly is located next to the second air inlet, the vertical plate is located between the filter assembly and the guide frame, and the second induced draft fan is located between the guide frame and the second air inlet.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention proposes an energy-saving HVAC waste heat recovery device, which recovers the waste heat discharged by the HVAC system through the continuously rotating heat recovery wheel, and transfers the waste heat to the cold air entering the box, while reducing the exhaust gas temperature, thereby improving energy utilization efficiency, reducing energy consumption, and avoiding the temperature increase and energy waste caused by direct discharge of waste heat warm air into the external environment, which is in line with the development concept of low carbon and environmental protection. At the same time, by setting a filter assembly to filter the air entering the first chamber and the second chamber, the air quality is guaranteed and the use effect of the device is improved. At the same time, the filter assembly is convenient to be pulled out of the box, so that the filter plate in the filter assembly can be cleaned after multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a side view of the overall structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the box of the present invention;

[0022] Figure 4 for Figure 3 A magnified view of the structure at center;

[0023] Figure 5 It is a schematic diagram of the structure of the bearing plate of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the turntable of the present invention;

[0025] Figure 7 This is a detailed diagram of the box structure of the present invention;

[0026] Figure 8 for Figure 7 A magnified view of the structure at B in the middle;

[0027] Fig. 9 for Figure 7 A magnified view of the structure at C in the middle;

[0028] Fig.10 It is a schematic diagram of the vertical plate structure of the present invention.

[0029] In the figure: 1, box body; 2, first air outlet; 3, first air inlet; 4, second air outlet; 5, filter assembly; 6, second air inlet; 8, motor; 9, first seat frame; 10, first chain; 11, transmission shaft; 12, second seat frame; 13, first chamber; 14, second chamber; 15, partition; 16, inner chamber; 17, vertical plate; 18, dividing plate; 19, guide frame; 20, second transmission sprocket; 21, second induced draft fan; 22, first induced draft fan; 23, bearing plate; 24, filter plate ; 25. Guide rod; 26. Inner groove; 27. Ball groove; 29. ​​Slide bar; 30. Slide groove; 31. Chassis; 32. Movable ball; 33. Square plate; 34. Rubber pad; 35. Handle; 36. Side ear; 37. Limit plate; 38. Heat recovery wheel; 39. Penetration area; 40. Rotating shaft; 41. Driven sprocket; 42. Second chain; 43. Driving sprocket; 44. First transmission sprocket; 46. Closing plate; 47. Square groove; 48. Through groove; 49. Inner groove; 50. Lock plate; 51. Through hole. DETAILED DESCRIPTION

[0030] Example 1: Please refer to Figures 1 to 10 The present invention provides a technical solution: an energy-saving HVAC waste heat recovery device, comprising: a box body 1, a partition 15 and a vertical plate 17 are arranged inside the box body 1, the vertical plate 17 penetrates the partition 15, the partition 15 divides the inside of the box body 1 into a first chamber 13 and a second chamber 14, the first chamber 13 is provided with a filter assembly 5, a guide frame 19 and a first induced draft fan 22, the second chamber 14 is provided with a filter assembly 5, a guide frame 19 and a second induced draft fan 21, the vertical plate 17 is provided with a heat recovery wheel 38, the surface of the heat recovery wheel 38 is provided with a plurality of evenly distributed partition plates 15, and a penetration area 39 is formed between two adjacent partition plates 15, and the surface of the penetration area 39 is provided with honeycomb-shaped penetration holes;

[0031] The recovery wheel is formed of two upper and lower air passages by the partition 15. The two air passages are respectively located in the first chamber 13 and the second chamber 14. Air can pass through the honeycomb-shaped penetration holes. The heat recovery wheel 38 is made of a metal with high thermal conductivity such as aluminum. The surface of the box body 1 is provided with a first air outlet 2, a first air inlet 3, a second air outlet 4 and a second air inlet 6. The first air outlet 2 and the first air inlet 3 are both communicated with the first chamber 13, and the second air outlet 4 and the second air inlet 6 are both communicated with the second chamber 14;

[0032] When in use, the heat recovery wheel 38 is made of a metal with high thermal conductivity, such as aluminum. At the same time, the partition plates 15 evenly distributed on the surface and the honeycomb-shaped through-hole design are conducive to the transfer of heat and the circulation of air, and can efficiently transfer heat. The waste heat warm air discharged by the HVAC enters the first chamber 13 through the first air inlet 3, and after being filtered by the filter component 5, it is guided by the first induced draft fan 22 to pass through the through-holes of the heat recovery wheel 38. Due to the continuous rotation of the heat recovery wheel 38, the waste heat is transferred to the cold air entering the second chamber 14, while the exhaust gas temperature is reduced.

[0033] Embodiment 2: Based on Embodiment 1, the surface of the vertical plate 17 is hollowed out, the cross section of the hollowed out portion is circular, the heat recovery wheel 38 is located in the hollowed out portion, a slide bar 29 is provided on the inner wall of the hollowed out portion of the vertical plate 17, a slide groove 30 is provided on the outer wall of the heat recovery wheel 38, and the slide groove 30 and the slide bar 29 are slidably connected;

[0034] When in use, while the reheat recovery wheel 38 continues to rotate, the provided slide bar 29 will continue to slide and connect in the slide groove 30, thereby improving the smoothness and continuity of the rotation of the hot water recovery wheel;

[0035] A rotating shaft 40 is fixed at the center of the surface of the heat recovery wheel 38, and both ends of the rotating shaft 40 are rotatably connected to the partition 15. A driven sprocket 41 is fixed to the surface of the rotating shaft 40. An inner cavity 16 is opened on the surface of the partition 15. The rotating shaft 40 and the driven sprocket 41 are located in the inner cavity 16. The inner cavity 16 extends to the surface of the box body 1. A motor 8 and a transmission shaft 11 are arranged on the outside of the box body 1. The motor 8 is fixed in the first seat frame 9. The first seat frame 9 is fixed to the surface of the box body 1 by bolts. The motor 8 is located below the inner cavity 16. Both ends of the transmission shaft 11 are rotatably connected to the second seat frame 12. A first transmission sprocket 44 and a second transmission sprocket 20 are fixed on the transmission shaft 11. A driving sprocket 43 is fixed to the output end of the motor 8.

[0036] The driving sprocket 43 and the first transmission sprocket 44 are connected by the first chain 10, the second transmission sprocket 20 is located outside the inner cavity 16, the second transmission sprocket 20 and the driven sprocket 41 are connected by the second chain 42, and a sealing plate 46 is provided at the inner cavity 16. The sealing plate 46 is in the shape of a square plate, and a square groove 47 is opened on the surface of the sealing plate 46. The second chain 42 passes through the square groove 47, and the sealing plate 46 is fixed to the surface of the box body 1 by bolts.

[0037] When in use, the motor 8 drives the heat recovery wheel 38 to rotate through the transmission shaft 11 and the sprocket and chain, connects the first transmission sprocket 44 through the first chain 10, and then drives the transmission shaft 11 to rotate, and then connects the second transmission sprocket 20 and the driven sprocket 41 through the second chain 42. The driven sprocket 41 is fixed on the rotating shaft 40 of the heat recovery wheel 38, thereby driving the heat recovery wheel 38 to rotate.

[0038] Embodiment 3: On the basis of Embodiment 2, the filter assembly 5 includes a carrier plate 23, the carrier plate 23 is in the shape of a square plate, the outer wall of the carrier plate 23 contacts and slides with the outer wall of the partition plate 15 and the inner wall of the box body 1 respectively, a filter plate 24 is provided on the surface of the carrier plate 23, and the filter holes distributed in a matrix are opened on the surface of the filter plate 24, a square plate 33 is fixed at the end surface of the carrier plate 23, a handle 35 is fixed on the surface of the square plate 33, and a rubber pad 34 is fixed on the inner and outer surfaces of the handle 35;

[0039] When in use, the handle 35 is arranged outside the box body 1. By holding the handle 35 and pulling it, the carrying plate 23 and the filter plate 24 can be conveniently moved out of the box body 1, so as to facilitate cleaning of the filter plate 24. The fixed rubber pad 34 can provide a buffer when pulling or pushing the handle 35, thereby improving the stability during operation. By setting the filter assembly 5 to filter the air entering the chamber, the air quality is guaranteed and the use effect of the device is improved.

[0040] Side ears 36 are fixed on both sides of the square plate 33, a guide rod 25 is fixed to one end of the side ears 36, and a limit plate 37 is fixed to the other end of the side ears 36. A chassis 31 is fixed at the end of the guide rod 25. The cross-sectional diameter of the chassis 31 is larger than the cross-sectional diameter of the guide rod 25. A plurality of evenly distributed movable balls 32 are arranged on the outer wall of the chassis 31. The interior of the box body 1 and the partition 15 are both provided with inner grooves 26. A through hole 51 is arranged on the outer wall of the box body 1. The through hole 51 is communicated with the inner groove 26. The chassis 31 is located in the inner groove 26. The outer wall of the chassis 31 contacts and slides with the inner wall of the inner groove 26. The outer wall of the guide rod 25 contacts and slides with the inner wall of the through hole 51. A plurality of evenly distributed ball grooves 27 are arranged on the inner wall of the inner groove 26. The movable balls 32 are located in the ball grooves 27 and are arranged to roll.

[0041] During use, when the handle 35 is pulled, the guide rod 25 will continue to be slidably connected with the through hole 51, and at the same time, the movable ball 32 will continue to roll in the ball groove 27 and the chassis 31 will continue to slide in the inner groove 26, both of which provide guidance and support for the movement of the carrier plate 23, thereby improving the stability and smoothness of the movement of the carrier plate 23 and avoiding jamming. When the carrier plate 23 is pulled out of the outer side of the box body 1, the filter plate 24 will leak out at the same time, making it convenient for the operator to clean the filter plate 24.

[0042] Embodiment 4: On the basis of embodiment 3, a through groove 48 is provided on the outer wall of the box body 1, and the bearing plate 23 enters the interior of the box body 1 through the through groove 48. An inner groove 49 is provided at the periphery of the through groove 48, and a sealing gasket is laid in the inner groove 49. The square plate 33 is embedded in the inner groove 49. Two groups of through holes 51 are provided, and the two groups of through holes 51 are respectively located on the upper and lower sides of the inner groove 49. Locking plates 50 are fixed on both sides of the through holes 51. The side ears 36 are in contact with and tightly pressed against the surface of the box body 1. The limit plate 37 is located between the two groups of locking plates 50. Mounting holes are provided between the limit plate 37 and the locking plate 50, and stud bolts are provided in the mounting holes. The middle part of the guide frame 19 is hollowed out, and the four sides of the surface of one side of the guide frame 19 are chamfered. The chamfered surfaces of the guide frame 19 located in the first chamber 13 and the second chamber 14 are all facing the filter assembly 5 to guide the air flow inside the chamber.

[0043] Working principle: In actual use, the first air inlet 3 is used to connect the waste heat air of the HVAC, the first air outlet 2 is used to discharge the treated waste heat air to the outside, the second air inlet 6 is connected to the outside cold air, and the second air outlet 4 is used for the treated outside cold air to flow into the room, and the first induced draft fan 22 facilitates the air to flow from the first air inlet 3 to the first air outlet 2, and the second induced draft fan 21 facilitates the air to flow from the second air inlet 6 to the second air outlet 4, and the air entering the chamber will be filtered through the filter component 5, and by starting the motor 8, the output end of the motor 8 will drive the driving sprocket 43 to rotate, and then under the transmission action of the first chain 10, the first transmission sprocket 44, the transmission shaft 11 and the second transmission sprocket 20 will be driven to rotate continuously, and then under the transmission action of the second chain 42, the driven sprocket 41 and the rotating shaft 40 will be driven to rotate continuously, thereby driving the heat recovery wheel 38 to When the waste heat air passes through the penetration area 39 located in the first chamber 13, since the heat recovery wheel 38 is made of a metal with high thermal conductivity such as aluminum, it absorbs heat from the waste heat air, and the cooled waste heat air is discharged through the first air outlet 2. As the heat recovery wheel 38 rotates, the penetration area 39 after absorbing heat will rotate to the inside of the second chamber 14, and the cold air will absorb heat when passing through the penetration area 39 after absorbing heat, thereby heating the cold air. Subsequently, the heated cold air is discharged into the room through the second air outlet 4, and at the same time, the penetration area 39 after absorbing heat rotates to the first chamber 13 to continue absorbing heat. This cycle is repeated to transfer the waste heat to the cold air entering the box body 1, while reducing the temperature of the discharged gas, thereby improving the energy utilization efficiency, reducing energy consumption, and avoiding the temperature increase and energy waste caused by the direct discharge of waste heat warm air to the external environment, which is in line with the development concept of low-carbon and environmental protection.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving HVAC waste heat recovery device, characterized in that: The energy-saving HVAC waste heat recovery device comprises: a housing (1), wherein a partition (15) and a vertical plate (17) are arranged inside the housing (1), the vertical plate (17) passes through the partition (15), the partition (15) divides the interior of the housing (1) into a first chamber (13) and a second chamber (14), wherein a filter assembly (5), a guide frame (19) and a first induced draft fan (22) are arranged in the first chamber (13), and wherein a filter assembly (5), a guide frame (19) and a second induced draft fan (21) are arranged in the second chamber (14); A vertical plate (17) is provided inside the vertical plate (17) with a heat recovery wheel (38), a surface of the heat recovery wheel (38) is provided with a plurality of evenly distributed partition plates (15), a penetration area (39) is formed between two adjacent partition plates (15), and a surface of the penetration area (39) is provided with honeycomb-shaped penetration holes.

2. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: The heat recovery wheel (38) is formed of two upper and lower air passages by a partition (15), and the two air passages are respectively located in the first chamber (13) and the second chamber (14), and air can pass through the honeycomb-shaped penetration holes. The heat recovery wheel (38) is made of a metal with high thermal conductivity such as aluminum. The surface of the box body (1) is provided with a first air outlet (2), a first air inlet (3), a second air outlet (4) and a second air inlet (6). The first air outlet (2) and the first air inlet (3) are both communicated with the first chamber (13), and the second air outlet (4) and the second air inlet (6) are both communicated with the second chamber (14).

3. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: The surface of the vertical plate (17) is hollowed out, and the cross-section of the hollowed-out portion is circular. The heat recovery wheel (38) is located in the hollowed-out portion. A sliding bar (29) is provided on the inner wall of the hollowed-out portion of the vertical plate (17), and a sliding groove (30) is provided on the outer wall of the heat recovery wheel (38). The sliding groove (30) and the sliding bar (29) are slidably connected.

4. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: A rotating shaft (40) is fixed at the center of the surface of the heat recovery wheel (38), and both ends of the rotating shaft (40) are rotatably connected to the partition (15). A driven sprocket (41) is fixed to the surface of the rotating shaft (40), and an inner cavity (16) is opened on the surface of the partition (15). The rotating shaft (40) and the driven sprocket (41) are located in the inner cavity (16), and the inner cavity (16) extends to the surface of the box body (1).

5. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: A motor (8) and a transmission shaft (11) are arranged outside the box body (1); the motor (8) is fixed in a first seat frame (9); the first seat frame (9) is fixed to the surface of the box body (1) by bolts; the motor (8) is located below the inner cavity (16); both ends of the transmission shaft (11) are rotatably connected to a second seat frame (12); a first transmission sprocket (44) and a second transmission sprocket (20) are fixed on the transmission shaft (11); and a driving sprocket (43) is fixed on the output end of the motor (8).

6. The energy-saving HVAC waste heat recovery device according to claim 5, characterized in that: The driving sprocket (43) and the first transmission sprocket (44) are connected via a first chain (10); the second transmission sprocket (20) is located outside the inner cavity (16); the second transmission sprocket (20) and the driven sprocket (41) are connected via a second chain (42); a sealing plate (46) is provided at the inner cavity (16); the sealing plate (46) is in the shape of a square plate; a square groove (47) is provided on the surface of the sealing plate (46); the second chain (42) passes through the square groove (47); and the sealing plate (46) is fixed to the surface of the box body (1) via bolts.

7. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: The filter assembly (5) comprises a carrier plate (23), the carrier plate (23) is in the shape of a square plate, the outer wall of the carrier plate (23) contacts and slides with the outer wall of the partition plate (15) and the inner wall of the box body (1) respectively, a filter plate (24) is arranged on the surface of the carrier plate (23), the surface of the filter plate (24) is provided with filter holes distributed in a matrix shape, a square plate (33) is fixed at the end surface of the carrier plate (23), a handle (35) is fixed on the surface of the square plate (33), and rubber pads (34) are fixed on the inner and outer surfaces of the handle (35).

8. The energy-saving HVAC waste heat recovery device according to claim 7, characterized in that: Side ears (36) are fixed on both sides of the square plate (33), a guide rod (25) is fixed to one end of the side ear (36), a limit plate (37) is fixed to the other end of the side ear (36), a bottom plate (31) is fixed at the end of the guide rod (25), the cross-sectional diameter of the bottom plate (31) is larger than the cross-sectional diameter of the guide rod (25), and a plurality of evenly distributed movable balls (32) are arranged on the outer wall of the bottom plate (31).

9. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: The box body (1) and the partition plate (15) are both provided with an inner groove (26), the outer wall of the box body (1) is provided with a through hole (51), the through hole (51) and the inner groove (26) are communicated, the bottom plate (31) is located in the inner groove (26), the outer wall of the bottom plate (31) and the inner wall of the inner groove (26) contact and slide, the outer wall of the guide rod (25) and the inner wall of the through hole (51) contact and slide, the inner wall of the inner groove (26) is provided with a plurality of evenly distributed ball grooves (27), and the movable balls (32) are located in the ball grooves (27) and are arranged to roll.

10. The energy-saving HVAC waste heat recovery device according to claim 1, characterized in that: In the first chamber (13), the filter assembly (5) is located next to the first air inlet (3), the first induced draft fan (22) is located next to the filter assembly (5), and the guide frame (19) is located between the vertical plate (17) and the first induced draft fan (22); in the second chamber (14), the filter assembly (5) is located next to the second air inlet (6), the vertical plate (17) is located between the filter assembly (5) and the guide frame (19), and the second induced draft fan (21) is located between the guide frame (19) and the second air inlet (6).

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