A waste heat recovery system for a chiller

Abstract

The present invention discloses a waste heat recovery system for a water chiller, which includes a housing. Inside the housing, there is a liquid storage tank for containing a heat exchange water body. In the middle of one side wall of the liquid storage tank, a heat conduction plate is fixedly installed. Inside the heat conduction plate, there is a driving mechanism for providing power. On the outer wall of one side of the housing, a cylinder is also fixedly installed. Inside the cylinder, there is a power generation mechanism that cooperates with the driving mechanism and is used for energy conversion. In the present invention, due to the uneven heating, the center of gravity of the rotating plate always deviates towards the inside of the heat conduction plate, and thus rotates continuously, converting the waste heat inside the heat exchange water into kinetic energy and completing the recovery. After the rotating shaft rotates, an induced current will be generated inside the induction coil to complete the energy recovery. Just electrically connect the two commutators to an electricity storage device to complete the storage of the current generated by the induction coil.

Description

Technical Field

[0001] The present invention relates to the technical field of chillers, and particularly to a waste heat recovery system for a chiller. Background Technique

[0002] In the refrigeration industry, there are two types: air-cooled chillers and water-cooled chillers. According to the compressor, they are further divided into screw chillers, scroll chillers, and centrifugal chillers. In terms of temperature control, there are low-temperature industrial chillers and normal-temperature chillers. The temperature of normal-temperature units is generally controlled within the range of 0°C to 35°C. The temperature control of low-temperature units is generally around 0°C to -100°C. Chillers are generally used in air-conditioning units and industrial cooling. When a chiller is operating, a large amount of heat is generated. Usually, this part of the heat is finally dissipated into the surrounding environment through the cooling water pipeline, so as to ensure the normal operation of the chiller. This part of the heat is called waste heat.

[0003] The existing patent (Publication No.: CN207540053U) is a waste heat recovery system for a chiller. The waste heat recovery system for a chiller includes a cooling water pipeline, and a heat exchanger, a circulation pump, and a cooling device are connected in series in the cooling water pipeline. The waste heat recovery system for a chiller further includes an air-conditioning heating pipeline, the inlet of the air-conditioning heating pipeline is connected to the upstream pipeline of the cooling device, and an air-conditioning heater for heat exchange with the cooling water in it is connected in series on the air-conditioning heating pipeline.

[0004] When this utility model works, an air-conditioning heating pipeline is connected to the cooling water pipeline. The hot water after heat exchange by the heat exchanger enters the air-conditioning heating pipeline to provide heat for the air-conditioning heating system. The recovered energy only circulates inside the water body, and the energy form is relatively single, thereby reducing the recovery efficiency.

[0005] Therefore, a waste heat recovery system for a chiller is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a waste heat recovery system for a chiller. Due to the uneven heating, the center of gravity of the rotating plate always deviates towards the inside of the heat conduction plate, and then rotates continuously, converting the waste heat inside the heat exchange water into kinetic energy and completing the recovery. After the rotating shaft rotates, an induced current will be generated inside the induction coil to complete the energy recovery. Just electrically connect the two commutators to the power storage device to complete the storage of the current generated by the induction coil, so as to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A waste heat recovery system for a water chiller, comprising a housing. Inside the housing, there is a liquid storage tank for containing a heat exchange water body. In the middle of one side wall of the liquid storage tank, a heat conduction plate is fixedly installed. Inside the heat conduction plate, there is a driving mechanism for providing power. On the outer wall of one side of the housing, a cylinder is also fixedly installed. Inside the cylinder, there is a power generation mechanism for converting energy, which cooperates with the driving mechanism. On one side wall of the housing, a device cavity is also opened. Inside the device cavity, there is a heat dissipation mechanism for cooling the driving mechanism and the power generation mechanism, which cooperates with the driving mechanism.

[0009] Preferably, the driving mechanism includes an arc-shaped groove opened in the middle of the heat conduction plate. Inside the arc-shaped groove, a rotating shaft is rotatably installed. On the outer edge of the rotating shaft inside the arc-shaped groove, a rotating plate is fixedly installed. Inside the rotating plate, a plurality of sliding cavities are equally spaced. Inside each sliding cavity, a sliding plug is slidably installed. Inside each sliding plug, a counterweight block is fixedly installed. Between each sliding plug and one side wall of the sliding cavity, evaporation liquid is filled.

[0010] First, the heat exchange water body is introduced into the inside of the liquid storage tank. Subsequently, the rotating plate on the side wall of the housing will absorb heat through the heat conduction plate and transfer it to the evaporation liquid inside the sliding cavity, causing the evaporation liquid to evaporate into gas after being heated and pushing the sliding plug and the counterweight block to move. Since only a part of the rotating plate is inserted into the heat conduction plate, the rotating plate will be partially heated. Therefore, only the evaporation liquid inside the area of the rotating plate that rotates into the heat conduction plate will be heated and evaporated into gas, causing the center of gravity of the rotating plate to shift towards the inside of the heat conduction plate. Subsequently, the rotating plate will rotate. When the heated area of the rotating plate rotates outside the heat conduction plate, it will no longer be heated, and its temperature will drop. Subsequently, the evaporation liquid will release the heat, then return to the liquid state again and drive the counterweight block to reset. At this time, the area of the rotating plate that rotates into the heat conduction plate will be heated again and drive the counterweight block to move, causing the center of gravity of the rotating plate to always deviate towards the inside of the heat conduction plate, and thus continue to rotate, converting the waste heat in the heat exchange water into kinetic energy and completing the recovery.

[0011] Preferably, heat insulation plates are fixedly installed between every two adjacent sliding cavities inside the rotating plate.

[0012] The setting of the heat insulation plates can make the heat transfer to the rotating plate through the heat conduction plate only transfer to the inside of the sliding cavity and cannot transfer to the rest of the heat conduction plate. Thus, the temperature difference between the two sides of the rotating plate changes greatly, effectively enhancing the change amount of the center of gravity, and further enhancing the rotation force of the rotating plate.

[0013] Preferably, the power generation mechanism includes a circular cavity opened inside the cylinder, a rotating rod is rotatably installed inside the circular cavity, one end of the rotating shaft passes through the device cavity and extends to the outside of the shell, and a reciprocating screw is fixedly installed inside the device cavity, and a groove is also opened inside the cylinder, one end of the rotating rod extends to the inside of the groove and is connected to one end of the rotating shaft through a transmission belt, an induction coil is fixedly installed on the outer edge of the rotating rod inside the circular cavity, and two magnets cooperating with the induction coil are symmetrically fixedly installed on the inner wall of the circular cavity.

[0014] After the shaft rotates, the transmission belt will drive the rotating rod inside the cylinder to rotate, and then drive the induction coil inside the circular cavity to cut the magnetic flux lines between the two magnets, thereby generating an induced current inside the induction coil, converting the kinetic energy of the shaft into electrical energy, thereby completing energy recovery.

[0015] Preferably, the heat dissipation mechanism includes a screw sleeve mounted on the outside of the reciprocating screw, a baffle is fixedly installed on the outside of the screw sleeve, air bags are fixedly installed between the two sides of the baffle and the two side walls of the device cavity, two one-way valves are fixedly installed at both ends of the two air bags inside the shell, a plurality of first nozzles are fixedly installed at equal intervals on the outside of the shell, a second nozzle is fixedly installed on one side wall of the circular cavity, the one-way valve on one side is connected with the plurality of first nozzles and the second nozzle, and the one-way valve on the other side is connected with the outside of the shell, and the side wall of the cylinder is also provided with an air outlet that cooperates with the second nozzle.

[0016] After the shaft rotates, the baffle will be driven to move back and forth inside the device cavity through the screw sleeve inside the device cavity, and then the baffle will squeeze the two airbags in turn, causing the two airbags to continuously shrink and expand, and then cooperate with the two one-way valves to draw the external gas into the interior of the airbags, and then spray it out through multiple first nozzles and second nozzles to dissipate heat to the external area of ​​the rotating plate located on the heat conduction plate and the interior of the circular cavity, so as to accelerate the cooling and heat dissipation of the area of ​​the rotating plate located outside the heat conduction plate, to ensure that the rotating plate has sufficient rotational torque, and to ensure that the internal temperature of the circular cavity will not be too high when generating electricity.

[0017] Preferably, two commutators electrically connected to the two ends of the induction coil are fixedly mounted on the inner wall of the circular cavity, and a power storage device is provided outside the shell, and the two commutators are electrically connected to the power storage device.

[0018] The current generated by the induction coil can be stored by simply electrically connecting the two commutators to the power storage device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Pass the heat-exchanged water body into the interior of the liquid storage tank. The uneven heating will cause the center of gravity of the rotating plate to always deviate towards the interior of the heat-conducting plate, and then continuously rotate, converting the remaining heat in the heat-exchanged water into kinetic energy and completing the recovery.

[0021] 2. After the rotating shaft rotates, an induced current will be generated inside the induction coil to complete the recovery of energy. Just electrically connect the two commutators to the power storage device to complete the storage of the current generated by the induction coil.

[0022] 3. After the rotating shaft rotates, it will pump the external gas into the interior of the airbag and then spray it out through multiple first nozzles and second nozzles to dissipate heat from the area outside the heat-conducting plate and the interior of the circular cavity of the rotating plate, so as to accelerate the cooling and heat dissipation of the area outside the heat-conducting plate of the rotating plate, ensure that the rotating plate has sufficient rotational torque, and ensure that the internal temperature of the circular cavity will not be too high when generating electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 is a schematic diagram of the structure of the present invention;

[0026] Figure 4 is a schematic diagram of the structure of the present invention;

[0027] Figure 5 is a schematic diagram of the structure of the present invention;

[0028] Figure 6 is a schematic diagram of the structure of the present invention.

[0029] In the figure: 1. Housing; 2. Liquid storage tank; 3. Heat-conducting plate; 4. Rotating plate; 5. Rotating shaft; 6. Heat-insulating plate; 7. Slide cavity; 8. Slide plug; 9. Counterweight; 10. Evaporating liquid; 11. Device cavity; 12. Reciprocating lead screw; 13. Lead screw sleeve; 14. Baffle; 15. Airbag; 16. Check valve; 17. First nozzle; 18. Cylinder; 19. Circular cavity; 20. Rotating rod; 21. Transmission belt; 22. Induction coil; 23. Magnet; 24. Second nozzle; 25. Air outlet. DETAILED DESCRIPTION OF THE INVENTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] Please refer to Figures 1 to 6 , the present invention provides a waste heat recovery system for a chiller, and the technical solution is as follows:

[0034] A waste heat recovery system for a chiller includes a housing 1. Inside the housing 1, there is a liquid storage tank 2 for containing a heat exchange water body. In the middle of one side wall of the liquid storage tank 2, a heat conducting plate 3 is fixedly installed. Inside the heat conducting plate 3, there is a driving mechanism for providing power. On the outer wall of one side of the housing 1, a cylinder 18 is also fixedly installed. Inside the cylinder 18, there is a power generation mechanism for converting energy and cooperating with the driving mechanism. On one side wall of the housing 1, a device cavity 11 is also opened. Inside the device cavity 11, there is a heat dissipation mechanism for cooling the driving mechanism and the power generation mechanism and cooperating with the driving mechanism.

[0035] As an implementation manner of the present invention, refer toFigure 3 and Figure 5 The driving mechanism includes an arc-shaped groove formed in the middle of the heat conducting plate 3. A rotating shaft 5 is rotatably installed inside the arc-shaped groove. A rotating plate 4 is fixedly installed on the outer edge of the rotating shaft 5 inside the arc-shaped groove. A plurality of sliding cavities 7 are equidistantly formed inside the rotating plate 4. A sliding plug 8 is slidably installed inside each sliding cavity 7. A counterweight 9 is fixedly installed inside each sliding plug 8. An evaporation liquid 10 is filled between each sliding plug 8 and one side wall of the sliding cavity 7.

[0036] First, the heat exchange water body is introduced into the inside of the liquid storage tank 2. Subsequently, the rotating plate 4 on the side wall of the housing 1 will absorb heat through the heat conducting plate 3 and transfer it to the evaporation liquid 10 inside the sliding cavity 7, causing the evaporation liquid 10 to evaporate into gas after being heated and push the sliding plug 8 and the counterweight 9 to move. Since only a part of the rotating plate 4 is inserted into the heat conducting plate 3, the rotating plate 4 will be partially heated. Then, only the evaporation liquid 10 inside the area of the rotating plate 4 that rotates into the heat conducting plate 3 will be heated and evaporated into gas, causing the center of gravity of the rotating plate 4 to shift towards the inside of the heat conducting plate 3. Subsequently, the rotating plate 4 will rotate. When the heated area of the rotating plate 4 rotates outside the heat conducting plate 3, it will no longer be heated, and its temperature will drop. Then, the evaporation liquid 10 will release the heat, then turn back into liquid and drive the counterweight 9 to reset. At this time, the area of the rotating plate 4 that rotates into the heat conducting plate 3 will be reheated and drive the counterweight 9 to move, causing the center of gravity of the rotating plate 4 to always deviate towards the inside of the heat conducting plate 3, and then continuously rotate, converting the waste heat inside the heat exchange water into kinetic energy and completing the recovery.

[0037] As an implementation manner of the present invention, referring to Figure 3 and Figure 5 heat insulation plates 6 are fixedly installed between every two adjacent sliding cavities 7 inside the rotating plate 4.

[0038] The setting of the heat insulation plates 6 can enable the heat to be transferred to the rotating plate 4 through the heat conducting plate 3 and only be transferred to the inside of the sliding cavity 7, and cannot be transferred to the rest of the heat conducting plate 3. Thus, the temperature difference between the two sides of the rotating plate 4 changes greatly, effectively enhancing the change amount of the center of gravity, and further enhancing the rotation force of the rotating plate 4.

[0039] As an implementation manner of the present invention, referring to Figure 2 、 Figure 4 and Figure 6, the power generation mechanism includes a circular cavity 19 opened inside the cylinder 18. A rotating rod 20 is rotatably installed inside the circular cavity 19. One end of the rotating shaft 5 penetrates through the device cavity 11 and extends to the outside of the housing 1, and a reciprocating lead screw 12 is fixedly installed inside the device cavity 11. A groove is also opened inside the cylinder 18. One end of the rotating rod 20 extends into the groove and is drivingly connected to one end of the rotating shaft 5 through a transmission belt 21. An induction coil 22 is fixedly installed on the outer edge of the rotating rod 20 inside the circular cavity 19. Two magnets 23 cooperating with the induction coil 22 are symmetrically and fixedly installed on the inner wall of the circular cavity 19.

[0040] After the rotating shaft 5 rotates, it will drive the rotating rod 20 inside the cylinder 18 to rotate through the transmission belt 21, and then drive the induction coil 22 inside the circular cavity 19 to cut the magnetic induction lines between the two magnets 23, thereby generating an induced current inside the induction coil 22, converting the kinetic energy of the rotating shaft 5 into electrical energy, and thus completing the energy recovery.

[0041] As an implementation manner of the present invention, refer to Figure 2 , Figure 4 and Figure 6 , the heat dissipation mechanism includes a lead screw sleeve 13 sleeved outside the reciprocating lead screw 12. A baffle 14 is fixedly installed outside the lead screw sleeve 13. Air bags 15 are fixedly installed between both sides of the baffle 14 and both side walls of the device cavity 11. Two one-way valves 16 are fixedly installed at both ends of the two air bags 15 inside the housing 1. A plurality of first nozzles 17 are fixedly installed at equal intervals outside the housing 1. A second nozzle 24 is fixedly installed on one side wall of the circular cavity 19. One side one-way valve 16 is communicated with the plurality of first nozzles 17 and the second nozzle 24, and the other side one-way valve 16 is communicated with the outside of the housing 1. An air outlet 25 cooperating with the second nozzle 24 is also opened on the side wall of the cylinder 18.

[0042] After the rotating shaft 5 rotates, it will drive the baffle 14 to reciprocate inside the device cavity 11 through the lead screw sleeve 13 inside the device cavity 11. Subsequently, the baffle 14 will alternately squeeze the two air bags 15, causing the two air bags 15 to continuously contract and expand, and then cooperate with the two one-way valves 16 to pump the external gas into the inside of the air bags 15 and spray it out through the plurality of first nozzles 17 and the second nozzle 24 to dissipate heat from the area where the rotating plate 4 is outside the heat conducting plate 3 and the inside of the circular cavity 19, so as to accelerate the cooling and heat dissipation of the area where the rotating plate 4 is outside the heat conducting plate 3, ensure that the rotating plate 4 has sufficient rotational torque, and ensure that the internal temperature of the circular cavity 19 will not be too high when generating electricity inside.

[0043] As an implementation manner of the present invention, refer to Figure 2, two commutators electrically connected to the two ends of the induction coil 22 are fixedly installed on the inner wall of the circular cavity 19, and a power storage device is provided outside the housing 1. Both commutators are electrically connected to the power storage device.

[0044] Just electrically connect the two commutators to the power storage device to complete the storage of the current generated by the induction coil 22.

[0045] Working principle: First, the heat exchange water body is introduced into the interior of the liquid storage tank 2. Subsequently, the rotating plate 4 on the side wall of the housing 1 will absorb heat through the heat conduction plate 3 and transfer it to the evaporation liquid 10 inside the sliding cavity 7, causing the evaporation liquid 10 to evaporate into a gas after being heated and push the sliding plug 8 and the counterweight 9 to move. Since only a part of the rotating plate 4 is inserted into the heat conduction plate 3, the rotating plate 4 will be partially heated. Therefore, only the evaporation liquid 10 inside the rotating plate 4 that rotates into the area of the heat conduction plate 3 will be heated and evaporated into a gas, causing the center of gravity of the rotating plate 4 to shift towards the inside of the heat conduction plate 3. Subsequently, the rotating plate 4 will rotate. When the heated area of the rotating plate 4 rotates outside the heat conduction plate 3, it will no longer be heated, and its temperature will drop. Subsequently, the evaporation liquid 10 will release heat, then return to a liquid state and drive the counterweight 9 to reset. At this time, the area inside the rotating plate 4 that rotates into the heat conduction plate 3 will be reheated and drive the counterweight 9 to move, causing the center of gravity of the rotating plate 4 to always deviate towards the inside of the heat conduction plate 3, and thus continue to rotate, converting the waste heat inside the heat exchange water into kinetic energy and completing the recovery. The setting of the heat insulation plate 6 can ensure that after the heat is transferred to the rotating plate 4 through the heat conduction plate 3, it can only be transferred to the inside of the sliding cavity 7 and cannot be transferred to the rest of the heat conduction plate 3. Thus, the temperature difference between the two sides of the rotating plate 4 changes greatly, effectively enhancing the change in the center of gravity and further enhancing the rotation force of the rotating plate 4. After the rotating shaft 5 rotates, it will drive the rotating rod 20 inside the cylinder 18 to rotate through the transmission belt 21, and then drive the induction coil 22 inside the circular cavity 19 to cut the magnetic induction lines between the two magnets 23, thereby generating an induced current inside the induction coil 22, converting the kinetic energy of the rotating shaft 5 into electrical energy, and thus completing the energy recovery. Just electrically connect the two commutators to the power storage device to complete the storage of the current generated by the induction coil 22. After the rotating shaft 5 rotates, it will drive the baffle 14 to reciprocate inside the device cavity 11 through the lead screw sleeve 13 inside the device cavity 11. Subsequently, the baffle 14 will alternately squeeze the two air bags 15, causing the two air bags 15 to continuously contract and expand. Then, in cooperation with the two one-way valves 16, the external gas will be pumped into the inside of the air bags 15 and sprayed out through the multiple first nozzles 17 and the second nozzle 24 to dissipate heat from the area outside the heat conduction plate 3 of the rotating plate 4 and the inside of the circular cavity 19, so as to accelerate the cooling and heat dissipation of the area outside the heat conduction plate 3 of the rotating plate 4, ensure that the rotating plate 4 has sufficient torque, and ensure that the temperature inside the circular cavity 19 will not be too high when generating electricity.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery system for a chiller, comprising a housing (1), characterized in that: A liquid storage tank (2) for containing heat exchange water is provided inside the shell (1), a heat conduction plate (3) is fixedly mounted in the middle of a side wall of the liquid storage tank (2), a driving mechanism for providing power is provided inside the heat conduction plate (3), a cylinder (18) is also fixedly mounted on an outer wall of one side of the shell (1), a power generation mechanism for converting energy in cooperation with the driving mechanism is provided inside the cylinder (18), a device cavity (11) is also provided on one side wall of the shell (1), a heat dissipation mechanism for cooling the driving mechanism and the power generation mechanism is provided inside the device cavity (11); The driving mechanism comprises an arc-shaped groove opened in the middle of the heat conducting plate (3), a rotating shaft (5) is rotatably installed inside the arc-shaped groove, a rotating plate (4) is fixedly installed on the outer edge of the rotating shaft (5) inside the arc-shaped groove, a plurality of sliding cavities (7) are opened at equal intervals inside the rotating plate (4), a sliding plug (8) is slidably installed inside each sliding cavity (7), a counterweight (9) is fixedly installed inside each sliding plug (8), and an evaporative liquid (10) is filled between each sliding plug (8) and a side wall of the sliding cavity (7); The heat dissipation mechanism comprises a screw sleeve (13) sleeved on the outside of a reciprocating screw (12); a baffle (14) is fixedly installed on the outside of the screw sleeve (13); air bags (15) are fixedly installed between the two sides of the baffle (14) and the two side walls of the device cavity (11); two one-way valves (16) are fixedly installed at both ends of the two air bags (15) inside the shell (1); a plurality of first nozzles (17) are fixedly installed at equal intervals on the outside of the shell (1); a second nozzle (24) is fixedly installed on one side wall of the circular cavity (19); the one-way valve (16) on one side is connected to the plurality of first nozzles (17) and the second nozzle (24); the one-way valve (16) on the other side is connected to the outside of the shell (1); and the side wall of the cylinder (18) is also provided with an air outlet (25) that cooperates with the second nozzle (24).

2. The waste heat recovery system of a water chiller according to claim 1, wherein: A heat insulation board (6) is fixedly installed between every two adjacent sliding cavities (7) inside the rotating plate (4).

3. The waste heat recovery system of a water chiller according to claim 1, wherein: The power generation mechanism comprises a circular cavity (19) opened inside a cylinder (18), a rotating rod (20) is rotatably installed inside the circular cavity (19), one end of the rotating shaft (5) passes through the device cavity (11) and extends to the outside of the shell (1), and a reciprocating screw (12) is fixedly installed inside the device cavity (11), a groove is also opened inside the cylinder (18), one end of the rotating rod (20) extends to the inside of the groove and is connected to one end of the rotating shaft (5) through a transmission belt (21), an induction coil (22) is fixedly installed on the outer edge of the rotating rod (20) inside the circular cavity (19), and two magnets (23) matching the induction coil (22) are symmetrically fixedly installed on the inner wall of the circular cavity (19).

4. The waste heat recovery system of a chiller according to claim 2, wherein: Two commutators electrically connected to the two ends of the induction coil (22) respectively are fixedly installed on the inner wall of the circular cavity (19), and a power storage device is arranged outside the housing (1). Both of the two commutators are electrically connected to the power storage device.

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