Thermoelectric conversion device

Abstract

A thermoelectric conversion device, comprising a housing (10), a base (20), a Tesla turbine (30), a first magnet (40), a second magnet (50), a positive electrode connecting member (60), and a negative electrode connecting member (70). The housing (10) is provided with a heat conduction part (11), a high-pressure gas chamber (13) and a low-pressure liquid chamber (14) which are communicated with each other are formed in the housing (10), and a vaporization chamber (12) communicated with the high-pressure gas chamber (13) and the low-pressure liquid chamber (14) is formed between the bottom of the base (20) and the heat conduction part (11); the Tesla turbine (30) comprises a rotating shaft (31) connected to the housing (10) and / or the base (20), and an impeller (32) and pressure-boosting fan blades (37) sleeved on the rotating shaft (31); the impeller (32) comprises a plurality of conductive vanes (321) spaced apart in the axial direction of the rotating shaft (31).

Description

Thermoelectric conversion device Technical Field

[0001] The present application relates to the technical field of energy conversion equipment, and in particular to a thermoelectric conversion device. Background Art

[0002] In daily life and industrial production, a large amount of waste heat from production and life is discharged into the environment in large quantities. At the same time, in order to discharge heat energy, a large amount of resources and energy are also consumed. Effectively collecting and utilizing these low, scattered and small heat energies can greatly reduce energy waste. Technical issues

[0003] One of the purposes of the embodiments of the present application is to provide a thermoelectric conversion device. Technical Solutions

[0004] The technical solution adopted in the embodiment of the present application is to provide a thermoelectric conversion device, comprising:

[0005] A shell having a heat conducting portion; a high-pressure steam chamber and a low-pressure liquid chamber that are interconnected are formed in the shell;

[0006] A base is provided in the housing; a vaporization chamber is formed between the base and the heat conducting portion and is connected to the high-pressure vapor chamber and the low-pressure liquid chamber;

[0007] A Tesla turbine is disposed within the high-pressure steam chamber and on a side of the base facing away from the vaporization chamber; the Tesla turbine comprises a rotating shaft connected to the housing and / or the base, and an impeller and booster blades sleeved on the rotating shaft; the impeller comprises a plurality of conductive blades spaced axially along the rotating shaft, the inner edges of the blades being provided with openings; the outer edges of the booster blades extend to the inner circumferential sidewall of the housing;

[0008] a first magnet and a second magnet located on opposite sides of the impeller along the axial direction of the rotating shaft and having opposite magnetic poles; and

[0009] A positive connector and a negative connector are electrically connected to the impeller; one of the positive connector and the negative connector is electrically connected to the inner edge of the wheel blade, and the other is electrically connected to the outer edge of the wheel blade.

[0010] Optionally, the high-pressure steam chamber, the low-pressure liquid chamber and the vaporization chamber are pre-set to a vacuum state.

[0011] Optionally, the wheel pieces are parallel to each other and are straight circular discs or pot-shaped curved discs, and / or the outer edges of the wheel pieces are in a bent structure.

[0012] Optionally, the wheel is made of a conductive, lightweight, high-strength material, and a low-resistance conductive material is provided on the surface of the wheel.

[0013] Optionally, outer edges of two adjacent wheel plates are electrically connected, and the positive electrode connector or the negative electrode connector is electrically connected to the outer edge of one of the wheel plates.

[0014] Optionally, the Tesla turbine further includes a collector sheet, which is located on one side of the impeller along the axial direction of the rotating shaft and is sleeved on the rotating shaft. Conductive sheets are provided between the outer edge of the collector sheet and the outer edge of the adjacent wheel sheet, and between the outer edges of two adjacent wheel sheets. The inner edge of the collector sheet is electrically connected to the positive electrode connector or the negative electrode connector.

[0015] Optionally, the rotating shaft includes a conductive inner shaft layer and a conductive outer shaft layer which is sleeved on the inner shaft layer, an insulating layer is provided between the outer shaft layer and the inner shaft layer, one of the inner shaft layer and the outer shaft layer is electrically connected to the inner edge of each of the wheel plates, and the other is electrically connected to the inner edge of the collector plate, one of the positive electrode connector and the negative electrode connector is electrically connected to the inner shaft layer, and the other is electrically connected to the outer shaft layer.

[0016] Optionally, the thermoelectric conversion device also includes a first brush and a second brush electrically connected to the positive electrode connector and the negative electrode connector respectively, one of the first brush and the second brush is movably sleeved on the inner layer of the shaft and electrically connected to the inner layer of the shaft, and the other is movably sleeved on the outer layer of the shaft and electrically connected to the outer layer of the shaft.

[0017] Optionally, the thermoelectric conversion device also includes a plurality of capillary liquid-conducting vaporization structures arranged in the vaporization chamber, the plurality of capillary liquid-conducting vaporization structures are arranged on the heat-conducting part, and the plurality of capillary liquid-conducting vaporization structures are radially laid out around the central axis of the rotating shaft, and the capillary liquid-conducting vaporization structures are densely covered with a plurality of capillary holes.

[0018] Optionally, a spiral flow channel is formed between two adjacent blades of the impeller, and the spiral flow channel has a fluid inlet and a fluid outlet. The fluid inlet is located at the outer edge of the blade, and the fluid outlet is located at the inner edge of the blade and is connected to the through port.

[0019] Optionally, the pitch of the spiral flow channel decreases from the outer edge of the wheel blade to the center of the wheel blade.

[0020] Optionally, there are multiple spiral flow channels, and the multiple spiral flow channels are concentrically arranged. The fluid inlets of the multiple spiral flow channels are distributed at intervals along the outer circumferential edge of the wheel blade, and the fluid outlets of the multiple spiral flow channels are distributed at intervals along the inner circumferential edge of the wheel blade.

[0021] Optionally, the thermoelectric conversion device also includes a plurality of cylindrical rings arranged in the high-pressure steam chamber and located on the side of the base away from the vaporization chamber. The plurality of cylindrical rings are distributed and connected in sequence along the axial direction of the rotating shaft to divide the high-pressure steam chamber into a plurality of graded chambers. A flow channel is formed between the cylindrical ring and the inner circumferential side wall of the shell. The graded chamber closest to the base is connected to the low-pressure liquid chamber, and the graded chamber farthest from the base is connected to the vaporization chamber through the flow channel. There are multiple impellers, and the multiple impellers are distributed at intervals along the axis of the rotating shaft and are respectively located in the multiple graded chambers.

[0022] Optionally, the cross section of the flow channel decreases step by step in a direction away from the vaporization chamber.

[0023] Optionally, there are multiple boosting blades, which are spaced apart along the axial direction of the rotating shaft and are respectively located on one side of the multiple grading cavities close to the low-pressure liquid chamber. Beneficial effects

[0024] The beneficial effect of the thermoelectric conversion device provided by the embodiment of the present application is that, compared with the prior art, the refrigerant in the vaporization chamber absorbs heat from the external heat source through the heat conduction part and is converted from liquid to gas. After the impeller and the booster blades are connected to the external current through the positive and negative connectors as disc conductors, they are driven to rotate by cutting the magnetic lines of force between the first magnet and the second magnet, and the refrigerant vapor in the vaporization chamber is sucked into the high-pressure steam chamber, so that the high-pressure steam chamber is pressurized and rotates at high speed, driving the wheel to rotate and do work. After the high-energy vapor refrigerant loses its energy, it changes from vapor to liquid and flows through the port to the low-pressure liquid chamber, and is finally sent back to the vaporization chamber to enter a new cycle. When the power of the thermal steam is sufficient to drive the impeller to rotate, the external current is disconnected, and the positive and negative connectors are electrically connected to the electrical equipment or energy storage battery on the external circuit. The conductor wheel rotates in the magnetic field to generate electromotive force, which supplies power to the electrical equipment or stores it in the energy storage battery, thereby converting heat into electrical energy. The impeller in the device is both a fan blade for steam boosting, and a rotor driven by the internal energy of the steam to output power, and also a coil rotor, forming a motor structure or a generator structure with the first magnet and the second magnet, and conducting the inlet and outlet current through the shaft and the collector, so that the impeller integrates multiple functions, simplifies the structure, and reduces the size of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 is a vertical cross-sectional view of a thermoelectric conversion device provided in a first embodiment of the present application;

[0027] FIG2 is a schematic diagram of the three-dimensional structure of the wheel provided in the first embodiment of the present application;

[0028] FIG3 is a diagram showing the first state of use of the thermoelectric conversion device provided in an embodiment of the present application;

[0029] FIG4 is a second diagram of the thermoelectric conversion device in use according to an embodiment of the present application;

[0030] FIG5 is a schematic diagram of the three-dimensional structure of the capillary liquid vaporization structure provided in the first embodiment of the present application;

[0031] FIG6 is a vertical cross-sectional view of a thermoelectric conversion device provided in a second embodiment of the present application;

[0032] FIG7 is a schematic diagram of a top view of the wheel provided in the second embodiment of the present application;

[0033] FIG8 is a vertical cross-sectional view of a thermoelectric conversion device provided in the third embodiment of the present application.

[0034] Among them, the reference numerals in the figures are:

[0035] 10. Shell; 11. Heat conducting part; 12. Vaporization chamber; 13. High-pressure steam chamber; 131. Grading chamber; 14. Low-pressure liquid chamber; 15. Groove; 16. Flow channel; 20. Base; 22. Air cylinder; 223. Cylinder ring; 30. Tesla turbine; 31. Rotating shaft; 311. Inner layer of shaft; 312. Outer layer of shaft; 32. Impeller; 321. Blade; 322. Through hole; 323. First center hole; 33. Collector; 34. Conductive sheet; 35. Spiral flow channel; 351. Fluid inlet; 352. Fluid outlet; 36. Spiral wire; 37. Booster blade; 40. First magnet; 50. Second magnet; 60. Positive electrode connector; 70. Negative electrode connector; 80. First brush; 90. Second brush; 100. Cover; 110. Capillary liquid vaporization structure; 111. Capillary hole; 200. Heat source; 300. External circuit; 301. Power supply; 302. Energy storage battery. Modes for Carrying Out the Invention

[0036] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit this application.

[0037] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] Please refer to Figures 1 through 5 for a description of the thermoelectric conversion device provided in the first embodiment of this application. This device converts heat from a heat source 200 into electrical energy. This device is used to collect heat from low-power electronic devices, industrial waste heat, solar energy, and other sources, thereby improving energy utilization and reducing energy waste. Heat source 200 can be, but is not limited to, a server CPU or a photovoltaic panel in a solar thermal collector.

[0039] Referring to Figures 1 and 2, the thermoelectric conversion device includes a housing 10, a base 20, a Tesla turbine 30, a first magnet 40, a second magnet 50, a positive electrode connector 60, and a negative electrode connector 70. The housing 10 has a heat conducting portion 11; a high-pressure steam chamber 13 and a low-pressure liquid chamber 14 are formed in the housing 10 and are interconnected. The base 20 is disposed in the housing 10; a vaporization chamber 12 is formed between the bottom of the base 20 and the heat conducting portion 11 and is connected to the high-pressure steam chamber 13 and the low-pressure liquid chamber 14; the Tesla turbine 30 is disposed in the high-pressure steam chamber 13 and is located on the side of the base 20 away from the vaporization chamber 12; the Tesla turbine 30 includes a rotating shaft 31 connected to the housing 10 and / or the base 20, and an impeller 32 and a booster blade 37 sleeved on the rotating shaft 31; the impeller 32 and the booster blade 37 are sleeved on the impeller 32. 2 includes a plurality of conductive blades 321 spaced apart along the axial direction of the rotating shaft 31, with openings 322 formed on the inner edges of the blades 321; the outer edges of the booster blades 37 extend to the inner peripheral sidewall of the housing 10; the first magnet 40 and the second magnet 50 are located on opposite sides of the impeller 32 along the axial direction of the rotating shaft 31, with opposite magnetic poles; the positive connector 60 and the negative connector 70 are electrically connected to the impeller 32, and one of the positive connector 60 and the negative connector 70 is electrically connected to the inner edge of the blade 321, while the other is electrically connected to the outer edge of the blade 321.

[0040] Optionally, the impeller 32, the booster blades 37 and the shell 10 enclose a high-pressure steam chamber 13, the base 20 and the Tesla turbine 30 enclose a low-pressure liquid chamber 14, and the bottom of the base 20, the heat-conducting part 11 and part of the circumferential side wall of the shell 10 enclose a vaporization chamber 12.

[0041] The housing 10 is an insulator, and may be, but not limited to, a rectangular body, a cylinder, etc. In this embodiment, the housing 10 is a rectangular body.

[0042] Referring to Figure 1 , heat transfer portion 11 is configured to contact heat source 200 , and the refrigerant within vaporization chamber 12 absorbs heat from heat source 200 through heat transfer portion 11 . Since vaporization chamber 12 is connected to high-pressure vapor chamber 13 , which is connected to low-pressure liquid chamber 14 , and low-pressure liquid chamber 14 is connected to vaporization chamber 12 , it can be understood that the high-pressure vapor chamber 13 , low-pressure liquid chamber 14 , and vaporization chamber 12 are sequentially connected to form a refrigerant circulation loop. Specifically, at least part of the refrigerant in the vaporization chamber 12 absorbs heat from the heat source 200 through the heat conducting portion 11 and is converted from a low-temperature, low-pressure liquid state to a high-temperature, low-pressure vapor state. When the impeller 32 rotates, at least part of the refrigerant in the vaporization chamber 12 enters the high-pressure vapor chamber 13 under the rotational suction of the impeller 32 and the booster blades 37, and is converted from a high-temperature, low-pressure vapor state to a high-temperature, high-pressure vapor state. After the high-pressure vapor chamber 13 drives the Tesla turbine 30 and loses internal energy, at least part of the refrigerant is converted from a high-temperature, high-pressure vapor state to a low-temperature, low-pressure liquid state, flows to the low-pressure liquid chamber 14, and then flows to the vaporization chamber 12, entering a new cycle.

[0043] The base 20 and the housing 10 are coaxially arranged, and the rotating shaft 31 and the base 20 are coaxially arranged, that is, the rotating shaft 31 passes through the center of the base 20 .

[0044] Please refer to Figure 2. The impeller 321 is disc-shaped and has a first center hole 323 at its center. The impeller 321 is fixedly mounted on the rotating shaft 31 through the first center hole 323 and is coaxially arranged with the rotating shaft 31. When the impeller 32 rotates, the rotating shaft 31 is driven to rotate synchronously.

[0045] The plurality of impellers 321 are spaced apart along the axial direction of the rotating shaft 31 , which means that there is a gap between two adjacent impellers 321 in the axial direction of the rotating shaft 31 , and the gap is for the refrigerant to pass through.

[0046] The booster blades 37 are located on the side of the impeller 32 closest to the vaporization chamber 12. A third center hole is defined in the center of the booster blades 37. The booster blades 37 are fixedly mounted on the rotating shaft 31 through the third center hole. The booster blades 37 are coaxially disposed with the rotating shaft 31, allowing them to rotate synchronously with the rotating shaft 31. By mounting the booster blades 37 on the rotating shaft 31 and extending the outer edges of the booster blades 37 through the base 20 to the inner circumferential sidewalls of the housing 10, the booster blades 37 draw in gas to pressurize the high-pressure steam chamber 13 as they rotate synchronously with the rotating shaft 31.

[0047] Optionally, referring to Figures 3 and 4 , the positive connector 60 is electrically connected to the inner edge of the wheel 321, and the negative connector 70 is electrically connected to the outer edge of the wheel 321. Because the wheel 321 is conductive, when the positive connector 60 and the negative connector 70 are electrically connected to the external circuit 300, the wheel 321, the positive connector 60, the negative connector 70, and the external circuit 300 can form an electrical circuit. The external circuit 300 is provided with a power source 301, and the external circuit 300 is also provided with an energy storage battery 302 or an electrical device.

[0048] Because the first magnet 40 and the second magnet 50 are located on opposite sides of the impeller 32 along the axial direction of the rotating shaft 31, and the magnetic poles of the first magnet 40 and the second magnet 50 are opposite, when the positive connector 60 and the negative connector 70 are electrically connected to the external circuit 300, the first magnet 40 and the second magnet 50 form a pair of stators, and the impeller 32 functions as a rotor. Consequently, when the power supply 301 on the external circuit 300 supplies power to the impeller 32, electromagnetic induction causes the impeller 32 to rotate about the central axis of the rotating shaft 31, and the rotating shaft 31 rotates synchronously with the impeller 32. At this point, the impeller 32, the first magnet 40, and the second magnet 50 form a motor structure, as shown in FIG3 . When the impeller 32 rotates, it can drive the refrigerant in the vaporization chamber 12 into the high-pressure steam chamber 13. After the refrigerant enters the high-pressure steam chamber 13, the refrigerant forms a boundary layer along the surface of the impeller 321 and flows along a spiral path in the gap between two adjacent impellers 321. That is, the refrigerant forms a vortex in the high-pressure steam chamber 13 that rotates inward from the edge of the impeller 321. After flowing to the center of the impeller 321, the refrigerant flows downward through the port 322 and finally returns to the vaporization chamber 12 through the low-pressure liquid chamber 14.

[0049] It can be understood that after the refrigerant absorbs the heat of the heat source 200 through the heat conduction part 11 in the vaporization chamber 12, at least part of the refrigerant changes from a low-temperature, low-pressure liquid to a high-temperature, low-pressure vapor. The impeller 32 and the rotating shaft 31 rotate under the action of external electricity. The impeller 32 draws the refrigerant in the vaporization chamber 12 into the high-pressure vapor chamber 13, and causes the vapor refrigerant to rotate along the impeller 321, forming an inward rotating vortex. As the power of the heat source 200 increases, the increasing internal energy of the vapor refrigerant drives the impeller 321 to rotate through the viscosity of the molecules and the impeller 321. Finally, the refrigerant loses its internal energy and condenses from a vapor state to a liquid state, and flows to the vaporization chamber 12 through the port 322, and finally returns to the vaporization chamber 12, entering a new cycle.

[0050] When the power of the vaporized refrigerant is sufficient to drive the impeller 32 and the rotating shaft 31 to rotate, the power supply 301 of the external circuit 300 is disconnected, that is, the input of external power is disconnected, and the positive connector 60 and the negative connector 70 are electrically connected to the electrical equipment or energy storage battery 302 on the external circuit 300. Under the action of the magnetic field between the first magnet 40 and the second magnet 50, the rotating impeller 32 generates a voltage difference between the inner edge of the wheel 321 and the inner edge of the wheel 321, causing the wheel 321 to generate current. At this time, the impeller 32 and the first magnet 40 and the second magnet 50 form a generator structure. The current generated by the wheel 321 can power the electrical equipment on the external circuit 300, or be stored in the energy storage battery 302 on the external circuit 300, as shown in Figure 4.

[0051] It should be noted that the magnetic poles of the first magnet 40 and the second magnet 50 are opposite to each other, which means that the magnetic pole of one of the first magnet 40 and the second magnet 50 is the north pole and the magnetic pole of the other is the south pole. Alternatively, the magnetic pole of the first magnet 40 is the north pole and the magnetic pole of the second magnet 50 is the south pole.

[0052] Compared with the prior art, the thermoelectric conversion device provided by the present application is a device in which the refrigerant in the vaporization chamber 12 absorbs heat from the external heat source 200 through the heat conducting portion 11 and is converted from liquid to gas. After the impeller 32 and the booster blade 37 are connected to the external current through the positive connector 60 and the negative connector 70 as disc conductors, they are driven to rotate by cutting the magnetic lines of force between the first magnet 40 and the second magnet 50, and the refrigerant gas in the vaporization chamber 12 is sucked into the high-pressure steam chamber 13, so that the high-pressure steam chamber 13 is pressurized and rotates at high speed, driving the wheel 321 to rotate and do work. After the high-energy vapor refrigerant loses its energy, it changes from vapor to liquid and flows to the low-pressure liquid chamber 14 through the port 322, and is finally sent back to the vaporization chamber 12 to enter a new cycle. When the power of the hot steam is sufficient to drive the impeller 32 to rotate, the external current is disconnected, and the positive connector 60 and the negative connector 70 are electrically connected to the electrical equipment or energy storage battery 302 on the external circuit 300. The conductor wheel 321 rotates in the magnetic field to generate an electromotive force, which supplies power to the electrical equipment or stores it in the energy storage battery 302, thereby converting heat into electrical energy. The impeller 32 in the device is both a fan blade for boosting the gas pressure, and a rotor driven by the internal energy of the gas to output power, and also a coil rotor, forming a motor structure or a generator structure with the first magnet 40 and the second magnet 50, and conducting the incoming and outgoing current through the shaft and the collector 33, so that the impeller 32 integrates multiple functions into one, simplifies the structure, and reduces the size of the device.

[0053] The liquid refrigerant at a lower temperature can not only absorb the heat of the heat source 200, but also cool the thermoelectric conversion device itself. At the same time, the heat generated by the resistance and friction of the thermoelectric conversion device can vaporize the liquid refrigerant and convert it into the internal energy of the gaseous refrigerant, which is beneficial to improving energy utilization.

[0054] In one embodiment of the present application, the high-pressure steam chamber 13 , the low-pressure liquid chamber 14 , and the vaporization chamber 12 are all in a vacuum state.

[0055] In the above technical solution, the high-pressure steam chamber 13, the low-pressure liquid chamber 14 and the vaporization chamber 12 are all in a vacuum state. When the refrigerant flows in a circulation loop, the refrigerant can achieve high-efficiency gas-liquid two-phase conversion at a lower temperature, and a lower temperature heat source 200 can be utilized.

[0056] In one embodiment of the present application, referring to Figure 1 , the wheel pieces 321 are parallel flat discs or pot-shaped curved discs. Optionally, the outer edges of the wheel pieces 321 are bent.

[0057] When the impeller 321 has a pot-shaped curved surface, the impeller 321 can bend away from the vaporizer 12 or toward the vaporizer 12. The outer edge of the impeller 321 can be bent toward the vaporizer 12 or away from the vaporizer 12. This helps reduce the centrifugal force of the impeller 321 at high rotation speeds and improves the torsional strength of the impeller 321. Furthermore, it can achieve a longer viscous contact effect between the refrigerant molecules on the impeller 321 with a smaller diameter, thereby improving the efficiency of converting the internal energy of the refrigerant molecules into the kinetic energy of the Tesla turbine 30.

[0058] In one embodiment of the present application, the wheel 321 is made of a conductive, lightweight, and high-strength material.

[0059] Optionally, the material of the wheel blade 321 can be but not limited to carbon fiber, aviation aluminum, etc. By making the impeller 32 from conductive lightweight materials such as carbon fiber or aviation aluminum, the impeller 32 is lighter as a whole and easier to rotate.

[0060] In one embodiment of the present application, a low-resistance conductive material is provided on the surface of the wheel 321 .

[0061] Optionally, the surface of the wheel 321 is electroplated with a low-resistance material layer. The low-resistance material may be, but is not limited to, gold, silver, copper, or the like. Providing the low-resistance material layer on the surface of the wheel 321 serves as an electromotive force generating layer, thereby reducing the internal resistance of the wheel 321 when used as a rotor.

[0062] In one embodiment of the present application, outer edges of two adjacent wheel pieces 321 are electrically connected, and the positive electrode connector 60 or the negative electrode connector 70 is electrically connected to the outer edge of one of the wheel pieces 321 .

[0063] In the above technical solution, since the edges of two adjacent wheel pieces 321 are electrically connected, as long as one of the positive electrode connector 60 and the negative electrode connector 70 is electrically connected to the outer edge of one of the wheel pieces 321, it is possible to electrically connect each wheel piece 321 to the positive electrode connector 60 or the negative electrode connector 70, which is conducive to simplifying the structure.

[0064] In one embodiment of the present application, the Tesla turbine 30 also includes a collector plate 33, which is located on one side of the impeller 32 along the axial direction of the rotating shaft 31 and is sleeved on the rotating shaft 31. A conductive plate 34 is provided between the outer edge of the collector plate 33 and the outer edge of the adjacent wheel plate 321, and between the outer edges of two adjacent wheel plates 321. The inner edge of the collector plate 33 is electrically connected to the positive connector 60 or the negative connector 70.

[0065] Optionally, the collector plate 33 is disc-shaped, and a second center hole is provided in the center of the collector plate 33. The collector plate 33 is fixedly mounted on the rotating shaft 31 through the second center hole, and the collector plate 33 is coaxially arranged with the rotating shaft 31. The collector plate 33 can rotate synchronously with the rotating shaft 31. In the axial direction of the rotating shaft 31, the collector plate 33 and the adjacent wheel plate 321 are spaced apart.

[0066] The above technical solution is to arrange a conductive sheet 34 between the outer edge of the collector sheet 33 and the outer edge of the adjacent wheel sheet 321 and between the outer edges of two adjacent wheel sheets 321, so that the outer edge of the collector sheet 33 and the outer edge of the adjacent wheel sheet 321 are electrically connected through the conductive sheet 34, the outer edges of two adjacent wheel sheets 321 are electrically connected through the conductive sheet 34, and the inner edge of the collector sheet 33 is electrically connected to the positive electrode connector 60 or the negative electrode connector 70. Therefore, the outer edge of each wheel sheet 321 is electrically connected to the positive electrode connector 60 or the negative electrode connector 70 through the conductive sheet 34 and the collector sheet 33.

[0067] It should be noted that the inner edge of the collector plate 33 is not provided with an opening for the refrigerant to pass through. Specifically, the structure of the collector plate 33 is the same as that of the wheel plate 321. It can be understood that the collector plate 33 not only has the function of collecting electricity, but also has the function of the wheel plate 321.

[0068] In one embodiment of the present application, the rotating shaft 31 includes a conductive inner layer 311 and a conductive outer layer 312 which is sleeved on the inner layer 311. An insulating layer is provided between the outer layer 312 and the inner layer 311. One of the inner layer 311 and the outer layer 312 is electrically connected to the inner edge of each wheel 321, and the other is electrically connected to the inner edge of the collector 33. One of the positive electrode connector 60 and the negative electrode connector 70 is electrically connected to the inner layer 311, and the other is electrically connected to the outer layer 312.

[0069] Optionally, each wheel piece 321 is fixedly mounted on the inner layer 311 of the shaft through the first center hole 323, and the inner edge of each wheel piece 321 passes through the outer layer 312 of the shaft and contacts the inner layer 311 of the shaft to achieve electrical connection between the inner edge of the wheel piece 321 and the inner layer 311 of the shaft, wherein an insulating structure is provided between the inner edge of each wheel piece 321 and the outer layer 312 of the shaft, and the collector piece 33 is fixedly mounted on the outer layer 312 of the shaft through the second center hole, and the inner edge of the collector piece 33 contacts the fixed sleeve to achieve electrical connection between the inner edge of the collector piece 33 and the outer layer 312 of the shaft, as shown in Figures 1 and 6. Alternatively, each wheel piece 321 is fixedly mounted on the outer layer 312 of the shaft through the first center hole 323, and the inner edge of each wheel piece 321 contacts the outer layer 312 of the shaft to achieve electrical connection between the inner edge of the wheel piece 321 and the outer layer 312 of the shaft, and the collector piece 33 is fixedly mounted on the inner layer 311 of the shaft through the second center hole, and the inner edge of the collector piece 33 passes through the outer layer 312 and contacts the inner layer 311 of the shaft to achieve electrical connection between the inner edge of the collector piece 33 and the inner layer 311 of the shaft, wherein an insulating structure is provided between the inner edge of the collector piece 33 and the outer layer 312 of the shaft, as shown in Figure 8.

[0070] Optionally, the positive electrode connector 60 is electrically connected to the inner shaft layer 311 , and the negative electrode connector 70 is electrically connected to the outer shaft layer 312 . Alternatively, the positive electrode connector 60 is electrically connected to the outer shaft layer 312 , and the negative electrode connector 70 is electrically connected to the inner shaft layer 311 .

[0071] In the above technical solution, the positive electrode connector 60 is electrically connected to the inner edge of the wheel 321 through the inner shaft layer 311, and the negative electrode connector 70 is electrically connected to the outer edge of the wheel 321 through the outer shaft layer 312, the collector sheet 33, and the conductive sheet 34. Alternatively, the negative electrode connector 70 is electrically connected to the inner edge of the wheel 321 through the inner shaft layer 311, and the positive electrode connector 60 is electrically connected to the outer edge of the wheel 321 through the outer shaft layer 312, the collector sheet 33, and the conductive sheet 34. Alternatively, the positive electrode connector 60 is electrically connected to the outer edge of the wheel 321 through the inner shaft layer 311, the collector sheet 33, and the conductive sheet 34, and the negative electrode connector 70 is electrically connected to the inner edge of the wheel 321 through the outer shaft layer 312. Alternatively, the negative electrode connector 70 is electrically connected to the outer edge of the wheel 321 through the shaft inner layer 311, the current collector 33, and the conductive sheet 34, and the positive electrode connector 60 is electrically connected to the inner edge of the wheel 321 through the shaft outer layer 312. It is understood that the rotating shaft 31 also has a conductive function, so that the wheel 321 can be electrically connected to the positive electrode connector 60 and the negative electrode connector 70 through the rotating shaft 31, eliminating the need for additional conductive wires, which helps simplify the structure and reduce the size of the device.

[0072] In one embodiment of the present application, the thermoelectric conversion device also includes a first brush 80 and a second brush 90 that are electrically connected to the positive electrode connector 60 and the negative electrode connector 70 respectively. One of the first brush 80 and the second brush 90 is movably mounted on the inner layer 311 of the shaft and electrically connected to the inner layer 311 of the shaft, and the other is movably mounted on the outer layer 312 of the shaft and electrically connected to the outer layer 312 of the shaft.

[0073] Optionally, the first brush 80 is movably mounted on the shaft inner layer 311, allowing the shaft inner layer 311 to rotate relative to the first brush 80 about its own central axis, and the second brush 90 is movably mounted on the shaft outer layer 312, allowing the shaft outer layer 312 to rotate relative to the second brush 90 about its own central axis. Alternatively, the first brush 80 is movably mounted on the shaft outer layer 312, allowing the shaft outer layer 312 to rotate relative to the first brush 80 about its own central axis, and the second brush 90 is movably mounted on the shaft inner layer 311, allowing the shaft inner layer 311 to rotate relative to the second brush 90 about its own central axis. It is understood that the rotating shaft 31 is rotatable relative to the first brush 80 and the second brush 90 about its own central axis.

[0074] In the above technical solution, the positive electrode connector 60 is electrically connected to one of the inner layer 311 and the outer layer 312 of the shaft through the first brush 80, and the negative electrode connector 70 is electrically connected to the other of the inner layer 311 and the outer layer 312 of the shaft through the second brush 90. When the rotating shaft 31 rotates with the impeller 32, the first brush 80 and the second brush 90 remain stationary, that is, the positive electrode connector 60 and the negative electrode connector 70 remain stationary.

[0075] Optionally, the first brush 80 and the second brush 90 may be made of, but not limited to, nano-conductive materials.

[0076] In some embodiments of the present application, please refer to Figure 1. A groove 15 is provided on the bottom of the shell 10. The thermoelectric conversion device also includes a cover plate 100, which is sealed in the notch of the groove 15. The cover plate 100 is provided with a through hole for the positive connector 60 and the negative connector 70 to pass through. One end of the rotating shaft 31 extends into the groove 15. The first brush 80 and the second brush 90 are both located in the groove 15.

[0077] In some embodiments thereof, referring to FIG. 1 , the thermoelectric conversion device further comprises a wind tube 22 mounted on the base 20 , and both ends of the wind tube 22 along the rotating shaft 31 are open structures. The first magnet 40 is located in the wind tube 22 and is disposed on the base 20 , and the second magnet 50 is disposed on the inner wall of the shell 10 .

[0078] In some embodiments of the present application, one end of the rotating shaft 31 is rotatably connected to the base 20 , and the other end of the rotating shaft 31 is connected to the rotating shaft 31 of the shell 10 .

[0079] Optionally, one end of the rotating shaft 31 is rotatably connected to the base 20 through a bearing, and the other end of the rotating shaft 31 is connected to the rotating shaft 31 of the housing 10 through a bearing.

[0080] In one embodiment of the present application, referring to Figures 1 and 5, the thermoelectric conversion device further includes a plurality of capillary liquid conduction vaporization structures 110 disposed in the vaporization chamber 12. The plurality of capillary liquid conduction vaporization structures 110 are disposed on the heat conducting portion 11, and the plurality of capillary liquid conduction vaporization structures 110 are radially laid out around the central axis of the rotating shaft 31.

[0081] The capillary liquid conduction vaporization structure 110 is in thermal contact with the heat conduction part 11. Part of the heat on the heat source 200 is transferred to the capillary liquid conduction vaporization structure 110 through the heat conduction part 11. After the refrigerant in the low-pressure liquid chamber 14 flows into the vaporization chamber 12, part of the refrigerant enters the capillary liquid conduction vaporization structure 110 from one end of the capillary liquid conduction vaporization structure 110, and then is discharged from the other end of the capillary liquid conduction vaporization structure 110. When the refrigerant flows through the capillary liquid conduction vaporization structure 110, it can absorb the heat on the capillary liquid conduction vaporization structure 110 and vaporize.

[0082] In one embodiment of the present application, the capillary liquid vaporization structure 110 is densely distributed with a plurality of capillary holes 111 .

[0083] By forming a plurality of capillary holes 111 on the peripheral sidewalls of the plurality of capillary liquid-conducting vaporization structures 110 , the refrigerant vaporized in the capillary liquid-conducting vaporization structures 110 can be discharged from the capillary holes 111 in a timely manner.

[0084] Optionally, the capillary liquid vaporization structure 110 may be, but is not limited to, a thin copper tube.

[0085] Please refer to Figures 6 and 7 together, and the thermoelectric conversion device provided in the second embodiment of the present application will now be described. A spiral flow channel 35 is formed between two adjacent wheel blades 321. The spiral flow channel 35 has a fluid inlet 351 and a fluid outlet 352. The fluid inlet 351 is located at the outer edge of the wheel blade 321, and the fluid outlet 352 is located at the inner edge of the wheel blade 321.

[0086] A spiral wire 36 can be set between two adjacent impellers 321, and the spiral wire 36 is spiraled on the surface of the impeller 321 to form a spiral flow channel 35. The spiral flow channel 35 is set coaxially with the impeller 321. When the impeller 321 rotates, the refrigerant in the high-pressure steam chamber 13 is sucked into the low-pressure liquid chamber 14. The refrigerant enters the spiral flow channel 35 through the fluid inlet 351, and is then discharged from the fluid outlet 352, and then flows to the through port 322.

[0087] The above technical solution forms a spiral flow channel 35 between two adjacent impellers 321, and the refrigerant flows from the outer edge of the impeller 321 along the spiral flow channel 35 to the center of the impeller 321, so that the refrigerant travels a longer distance in the process of flowing from the outer edge of the impeller 321 to the center of the impeller 321, which is beneficial to increase the action time between the refrigerant and the surface of the impeller 321, so as to consume more internal energy of the gaseous refrigerant, and is beneficial to improve the cooling effect of the gaseous refrigerant.

[0088] Optionally, the spiral wire 36 is a conductor, so that two adjacent wheel pieces 321 can be electrically connected through the spiral wire 36, thereby omitting the conductive sheet 34, simplifying the structure and reducing costs.

[0089] In one embodiment of the present application, the pitch of the spiral flow channel 35 decreases from the outer edge of the wheel blade 321 to the center of the wheel blade 321 .

[0090] In the process of the refrigerant flowing from the outer edge of the impeller 321 along the spiral flow channel 35 to the center of the impeller 321, the internal energy of the refrigerant is gradually consumed, causing more and more gaseous refrigerant to condense into liquid refrigerant. After the refrigerant is converted from gas to liquid, the volume will become smaller, so that the spacing of the spiral flow channel 35 can be gradually reduced from the outer edge of the impeller 321 to the center of the impeller 321. By reducing the spacing of the spiral flow channel 35, the distance of the spiral flow channel 35 can be extended, which is beneficial to increase the action time of the gaseous refrigerant and the surface of the impeller 321, and is beneficial to improving the internal energy conversion efficiency of the refrigerant.

[0091] In one embodiment of the present application, there are multiple spiral flow channels 35, and the multiple spiral flow channels 35 are concentrically arranged. The fluid inlets 351 of the multiple spiral flow channels 35 are distributed at intervals along the outer circumferential edge of the wheel blade 321, and the fluid outlets 352 of the multiple spiral flow channels 35 are distributed at intervals along the inner circumferential edge of the wheel blade 321.

[0092] The above technical solution, by providing a plurality of concentric spiral flow channels 35, is beneficial to increasing the utilization area of ​​the wheel blade 321 when the refrigerant flows from the outer edge of the wheel blade 321 to the center of the wheel blade 321, improving the internal energy conversion efficiency of the refrigerant, and improving the energy utilization rate.

[0093] Please refer to Figure 8, and the thermoelectric conversion device provided in the third embodiment of the present application will now be described. The thermoelectric conversion device also includes a plurality of cylindrical rings 223 arranged in the high-pressure steam chamber 13 and located on the side of the base 20 away from the vaporization chamber 12. The plurality of cylindrical rings 223 are distributed and connected in sequence along the axial direction of the rotating shaft 31 to divide the high-pressure steam chamber 13 into a plurality of graded chambers 131. A 16 is formed between the cylindrical rings 223 and the inner peripheral side wall of the shell 10. The graded chamber 131 closest to the base 20 is connected to the vaporization chamber 12, and the graded chamber 131 farthest from the base 20 is connected to the vaporization chamber 12 through 16. There are multiple impellers 32, and the multiple impellers 32 are distributed at intervals along the axis of the rotating shaft 31 and are respectively located in the multiple graded chambers 131.

[0094] By distributing multiple impellers 32 at intervals along the axis of the rotating shaft 31 and positioning them within multiple grading chambers 131, a multi-stage impeller 32 is formed. As the impellers 32 rotate, the impeller 32 located in the grading chamber 131 farthest from the vaporizer 12 draws the refrigerant from the vaporizer 12. After passing through this impeller 32, the refrigerant flows to the impeller 32 in the next grading chamber 131, ultimately returning to the vaporizer 12 via the low-pressure liquid chamber 14. By employing multiple impellers 32, some of the gaseous refrigerant that cannot be liquefied after passing through the previous impeller 32 enters the next impeller 32 under the suction of the impeller 32, re-entering the cycle. This allows more refrigerant to be converted from gas to liquid, which helps increase the liquefaction of the gaseous refrigerant and improve the conversion efficiency of the internal energy of the gaseous refrigerant molecules, thereby improving energy utilization.

[0095] Optionally, there are three classification chambers 131 and three impellers 32, and the three impellers 32 are respectively located in the three classification chambers 131. Of course, the number of classification chambers 131 and impellers 32 can also be other numbers, which can be determined according to specific needs.

[0096] In one embodiment of the present application, the cross section of the flow channel 16 decreases step by step in a direction away from the vaporization chamber 12 .

[0097] Optionally, the diameters of the multiple grading cavities 131 decrease toward the vaporization chamber 12 , so that the cross section of the flow channel 16 decreases step by step toward away from the vaporization chamber 12 , and the diameters of the multiple impellers 32 decrease toward the vaporization chamber 12 .

[0098] Optionally, the shell 10 decreases in a direction approaching the vaporization chamber 12 , so that the cross section of the flow channel 16 decreases step by step in a direction away from the vaporization chamber 12 .

[0099] As the refrigerant in the high-pressure liquid chamber flows toward the low-pressure liquid chamber 14, the internal energy of the refrigerant is gradually consumed, causing more and more gaseous refrigerant to condense into liquid refrigerant. After the refrigerant is converted from gas to liquid, its volume will become smaller. Therefore, by reducing the diameter of the multiple graded cavities 131 toward the vaporization chamber 12, the refrigerant can more easily drive the impeller 32 to rotate.

[0100] A gap is formed between two adjacent cylindrical rings 223 for the booster blades 37 to move through, and the circumferential side walls of the cylindrical rings 223 are connected to the circumferential side walls of the housing 10 through connecting rods.

[0101] In one embodiment of the present application, there are multiple booster blades 37 , which are spaced apart along the axial direction of the rotating shaft 31 and are respectively located on one side of the multiple grading cavities 131 close to the low-pressure liquid chamber 14 .

[0102] Optionally, the number of the supercharging blades 37 is equal to the number of the impellers 32. When the number of the impellers 32 is three, the number of the supercharging blades 37 is also three. Of course, the number of the supercharging blades 37 can also be other numbers, which can be determined according to needs.

[0103] The thermoelectric conversion device provided in this application has at least the following beneficial effects:

[0104] 1. When the impeller 32 rotates, it drives the gaseous refrigerant to rotate. The gaseous refrigerant drives the wheel blade 321 to rotate and do work with its high internal energy. The gaseous refrigerant loses its internal energy and condenses into liquid refrigerant, entering a new cycle. When the power of the vaporized refrigerant is sufficient to drive the impeller 32 to rotate, the external power is disconnected, and the positive connector 60 and the negative connector 70 are electrically connected to the electrical equipment or energy storage battery 302 on the external circuit 300. The impeller 32 rotates to generate current to power the electrical equipment or store it in the energy storage battery 302, thereby realizing the conversion of heat into electrical energy, which is beneficial to improving energy utilization and reducing energy waste.

[0105] 2. Because the blades 321 of the impeller 32 are conductive and located between the first magnet 40 and the second magnet 50, the impeller 32 can also serve as a rotor, forming a motor structure or a generator structure with the first magnet 40 and the second magnet 50 without the need for additional conductive wires. This allows the impeller 32 to be multifunctional, simplifying the structure and reducing the size of the device.

[0106] 3. Since the Tesla turbine 30 also includes booster blades 37, the Tesla turbine 30 can also serve as an axial flow fan to draw the gaseous refrigerant from the vaporization chamber 12, thereby increasing the vacuum degree of the vaporization chamber 12, reducing the vaporization temperature of the refrigerant, and improving energy utilization efficiency.

[0107] 4. By utilizing the vacuum state, the refrigerant can achieve high-efficiency gas-liquid two-phase conversion at a lower temperature, and a lower temperature heat source 200 can be utilized.

[0108] 5. The liquid refrigerant at a relatively low temperature can not only absorb the heat from the heat source 200, but also cool the thermoelectric conversion device itself. At the same time, the heat generated by the resistance and friction of the thermoelectric conversion device can vaporize the liquid refrigerant and convert it into the internal energy of the gaseous refrigerant, which is beneficial to improving energy utilization.

[0109] 6. The electrical path structure formed by the rotating shaft 31, blades, conductive sheet 34, collector sheet 33, first brush 80, second brush 90, positive electrode connector 60, and negative electrode connector 70 can import and export electrical energy. The structure is simple and helps to reduce the size of the device.

[0110] 7. One of the first brush 80 and the second brush 90 is movably sleeved on the inner layer 311 of the shaft and electrically connected to the inner layer 311 of the shaft, and the other is movably sleeved on the outer layer 312 of the shaft and electrically connected to the outer layer 312 of the shaft, so that the brushes are maintenance-free and current can flow in and out while maintaining a vacuum seal.

[0111] 8. By making the wheel 321 into a pot-shaped curved surface and making the outer edge of the wheel 321 into a bent structure, it is beneficial to reduce the centrifugal force of the wheel 321 at high speed and improve the torsional strength of the wheel 321. At the same time, a longer viscous contact effect of the refrigerant molecules can be achieved on the wheel 321 with a smaller diameter, which is beneficial to improve the efficiency of converting the internal energy of the refrigerant molecules into kinetic energy.

[0112] 9. By providing a low-resistance conductive material on the surface of the wheel piece 321, the low-resistance conductive material can serve as an electromotive force generating layer, thereby reducing the internal resistance of the wheel piece 321 when it is used as a rotor.

[0113] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A thermoelectric conversion device, characterized in that: include: A shell having a heat conducting portion; a high-pressure steam chamber and a low-pressure liquid chamber which are interconnected are formed in the shell; A base disposed in the housing; A vaporization chamber connected to the high-pressure vapor chamber and the low-pressure liquid chamber is formed between the base and the heat-conducting portion; A Tesla turbine is arranged in the high-pressure steam chamber and located on the side of the base away from the vaporization chamber; the Tesla turbine comprises a rotating shaft connected to the housing and / or the base, and an impeller and a booster blade sleeved on the rotating shaft; the impeller comprises a plurality of conductive blades spaced apart along the axial direction of the rotating shaft, and the inner edge of the blade is provided with a through opening; the outer edge of the booster blade extends to the inner peripheral side wall of the housing; A first magnet and a second magnet respectively located at opposite sides of the impeller along the axial direction of the rotating shaft and having opposite magnetic poles; and A positive connector and a negative connector are electrically connected to the impeller; one of the positive connector and the negative connector is electrically connected to the inner edge of the wheel blade, and the other is electrically connected to the outer edge of the wheel blade.

2. The thermoelectric conversion device according to claim 1, characterized in that: The high-pressure steam chamber, the low-pressure liquid chamber and the vaporization chamber are set to a vacuum state in advance.

3. The thermoelectric conversion device according to claim 1, characterized in that: The wheel pieces are parallel to each other and are straight circular discs or pot-shaped curved discs, and / or the outer edges of the wheel pieces are in a bent structure.

4. The thermoelectric conversion device according to claim 1, characterized in that: The wheel piece is made of a conductive, lightweight and high-strength material, and a low-resistance conductive material is arranged on the surface of the wheel piece.

5. The thermoelectric conversion device according to any one of claims 1 to 4, characterized in that: The outer edges of two adjacent wheel sheets are electrically connected, and the positive electrode connector or the negative electrode connector is electrically connected to the outer edge of one of the wheel sheets.

6. The thermoelectric conversion device according to claim 5, characterized in that: The Tesla turbine also includes a collector sheet, which is located on one side of the impeller along the axial direction of the rotating shaft and is sleeved on the rotating shaft. Conductive sheets are provided between the outer edge of the collector sheet and the outer edge of the adjacent wheel sheet and between the outer edges of two adjacent wheel sheets. The inner edge of the collector sheet is electrically connected to the positive electrode connector or the negative electrode connector.

7. The thermoelectric conversion device according to claim 6, characterized in that: The rotating shaft includes a conductive inner shaft layer and a conductive outer shaft layer which is sleeved on the inner shaft layer, an insulating layer is provided between the outer shaft layer and the inner shaft layer, one of the inner shaft layer and the outer shaft layer is electrically connected to the inner edge of each of the wheel plates, and the other is electrically connected to the inner edge of the collector plate, one of the positive electrode connector and the negative electrode connector is electrically connected to the inner shaft layer, and the other is electrically connected to the outer shaft layer.

8. The thermoelectric conversion device according to claim 7, characterized in that: The thermoelectric conversion device also includes a first brush and a second brush electrically connected to the positive electrode connector and the negative electrode connector respectively, one of the first brush and the second brush is movably sleeved on the inner layer of the shaft and electrically connected to the inner layer of the shaft, and the other is movably sleeved on the outer layer of the shaft and electrically connected to the outer layer of the shaft.

9. The thermoelectric conversion device according to any one of claims 1 to 4, characterized in that: The thermoelectric conversion device also includes a plurality of capillary liquid-conducting vaporization structures disposed in the vaporization chamber. The plurality of capillary liquid-conducting vaporization structures are disposed on the heat-conducting portion, and the plurality of capillary liquid-conducting vaporization structures are radially laid out around the central axis of the rotating shaft. The capillary liquid-conducting vaporization structures are densely covered with a plurality of capillary holes.

10. The thermoelectric conversion device according to any one of claims 1 to 4, characterized in that: A spiral flow channel is formed between two adjacent wheel blades of the impeller. The spiral flow channel has a fluid inlet and a fluid outlet. The fluid inlet is located at the outer edge of the wheel blade, and the fluid outlet is located at the inner edge of the wheel blade and is connected to the through port.

11. The thermoelectric conversion device according to claim 10, characterized in that: The pitch of the spiral flow channel decreases from the outer edge of the wheel blade toward the center of the wheel blade.

12. The thermoelectric conversion device according to claim 10, characterized in that: There are multiple spiral flow channels, which are concentrically arranged. The fluid inlets of the multiple spiral flow channels are spaced apart along the outer circumferential edge of the wheel blade, and the fluid outlets of the multiple spiral flow channels are spaced apart along the inner circumferential edge of the wheel blade.

13. The thermoelectric conversion device according to any one of claims 1 to 4, characterized in that: It also includes a plurality of barrel rings arranged in the high-pressure steam chamber and located on the side of the base away from the vaporization chamber. The plurality of barrel rings are distributed and connected in sequence along the axial direction of the rotating shaft to divide the high-pressure steam chamber into a plurality of grading chambers. A flow channel is formed between the barrel ring and the inner peripheral side wall of the shell. The grading chamber closest to the base is connected to the low-pressure liquid chamber, and the grading chamber farthest from the base is connected to the vaporization chamber through the flow channel. There are a plurality of impellers, and the plurality of impellers are distributed at intervals along the axis of the rotating shaft and are respectively located in a plurality of grading chambers.

14. The thermoelectric conversion device according to claim 13, characterized in that: The cross section of the flow channel decreases step by step in a direction away from the vaporization chamber.

15. The thermoelectric conversion device according to claim 13, characterized in that: The number of the boosting blades is multiple, and the multiple boosting blades are distributed at intervals along the axial direction of the rotating shaft and are respectively located on one side of the multiple grading chambers close to the low-pressure liquid chamber.

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