Phase change heat transfer direct drive type heat pump system

Abstract

The invention discloses a phase change heat transfer direct drive type heat pump system, and belongs to the technical field of heat pumps, a flash evaporation unit provides steam for a heat pump unit through a steam channel, the flash evaporation unit comprises a flash evaporation tank body, a liquid inlet pipe is arranged in the flash evaporation tank body, and a liquid outlet pipe is arranged in the flash evaporation tank body; the two sides of the liquid inlet pipe are connected with liquid collection pipelines located on the two sides of the liquid inlet pipe through a plurality of liquid separation heat exchange pipes arranged in parallel, and the liquid collection pipelines are connected with a plurality of liquid drainage units arranged on the inner wall of the flash tank body through a plurality of liquid separation pipes correspondingly. And the liquid discharging unit is used for discharging liquid into a space above the liquid level in the flash tank body and discharging liquid into a space below the liquid level in the flash tank body. According to the application, simultaneous flash evaporation on liquid and under liquid can be realized through the liquid drainage units, the flash evaporation efficiency is controlled by controlling the number of the liquid drainage units on the liquid and under the liquid, and the under-liquid flash evaporation efficiency is controlled by controlling the distance between the liquid drainage port of the under-liquid drainage unit and the liquid level, so that accurate control on the flash evaporation efficiency of slurry is realized; meanwhile, the liquid discharging unit can be matched with multi-power flash evaporation equipment, and the adaptability is wide.

Description

Technical Field

[0001] The invention belongs to the technical field of heat pumps, and in particular to a phase-change heat carrier direct-drive heat pump system. Background Art

[0002] Waste heat recovery and utilization is an important branch in the field of energy conservation and environmental protection. my country is rich in industrial waste heat resources, especially in coal-fired power generation, steel, nonferrous metals, chemicals, cement, building materials, petroleum and petrochemicals, light industry and other industries. Waste heat resources account for about 17% to 67% of their total fuel consumption, of which recyclable waste heat resources account for about 60% of the total waste heat resources, and there is great potential for waste heat utilization. Taking the thermal power industry as an example, coal-fired thermal power plants burn a large amount of coal during operation, and the heat energy generated is mainly used for power generation and heating, but there is still a large amount of waste heat discharged into the atmosphere with the flue gas after desulfurization. Because the flue gas contains a large amount of pollutants and impurities, and there are serious corrosion and clogging problems, it is impossible to use conventional closed absorption methods for heat exchange.

[0003] At present, the flash evaporation position of the slurry in the flash evaporation unit is generally selected to be above the liquid level of the flash tank and below the demister. The slurry is sprayed in this space and flashes violently in this space. The exhaust steam after flash evaporation carries more droplets, which increases the load of the demister, and the flash evaporation efficiency cannot be accurately controlled according to the system load. At the same time, the droplets intercepted by the demister will undergo a certain heat exchange with the exhaust steam during the falling process, thereby reducing the exhaust steam temperature and reducing the heat exchange effect. Summary of the invention

[0004] Purpose of the invention: To provide a phase change heat carrier direct drive heat pump system to solve the above problems existing in the prior art.

[0005] Technical solution: A phase change heat carrier direct-drive heat pump system, comprising: a flash unit, which provides steam to the heat pump unit through a steam channel, and the flash unit comprises: a flash tank body, a liquid inlet pipe is arranged in the flash tank body, both sides of the liquid inlet pipe are connected to the liquid collecting pipeline located on both sides of the liquid inlet pipe through a plurality of parallel liquid separation heat exchange pipes, the liquid collecting pipeline is respectively connected to a plurality of drainage units arranged on the inner wall of the flash tank body through a plurality of liquid separation pipes, and the drainage unit is used to drain liquid into the space above the liquid surface in the flash tank body and to drain liquid into the space below the liquid surface in the flash tank body.

[0006] Furthermore, a demister is provided in the flash unit, and the demister is located between the liquid drainage unit and the liquid separation heat exchange tube.

[0007] Furthermore, the liquid separation heat exchange tubes are arranged in a multi-layer rectangular array.

[0008] Further, the liquid discharging unit includes: a buoyancy worm gear reducer, one end of a hollow liquid conveying shaft on the buoyancy worm gear reducer is communicated with a liquid distribution pipe, and the other end of the hollow liquid conveying shaft is connected to a liquid discharging pipe through a liquid passing swing arm.

[0009] Further, the buoyancy worm gear reducer includes: a reducer housing, the hollow liquid conveying shaft is installed in the reducer housing through a bearing, a first gear is arranged on the hollow liquid conveying shaft, a driven shaft and a worm are rotatably arranged in the reducer housing, a second gear and a worm gear are arranged on the driven shaft, the first gear is in meshing transmission with the second gear, the worm gear is in meshing transmission with the worm, a buoyancy driving rack is inserted through the reducer housing, and the buoyancy driving rack is connected to the worm through a gear set.

[0010] Further, the buoyancy driving rack includes: a rack, the rack is inserted through the reducer housing, and a float and a counterweight are installed on the rack.

[0011] Further, a communication cavity is arranged in the reducer housing, one end of the hollow liquid conveying shaft is placed in the communication cavity, a flange for closing the communication cavity is arranged on the reducer housing, and the liquid distribution pipe is installed on the flange.

[0012] Further, a plurality of liquid discharging ports are arranged on the side wall of the liquid discharging pipe.

[0013] Further, a gravity pipe is sleeved on the liquid discharging pipe through a sealing bearing, the closed end of the gravity pipe is axially limited by a bolt, a plurality of horizontal liquid discharging ports are arranged on the gravity pipe, and gravity blocks are arranged on the gravity pipe.

[0014] Further, a liquid discharging pipe, a maintenance port and a liquid level gauge are arranged on the flash evaporation unit. Beneficial effects

[0015] In this application, the liquid discharging unit can achieve simultaneous flash evaporation above and below the liquid, and at the same time, the flash evaporation efficiency can be controlled by controlling the number of liquid discharging units above and below the liquid, and the flash evaporation efficiency below the liquid can be controlled by controlling the distance between the liquid discharging ports of the liquid discharging unit below the liquid from the liquid surface, so as to achieve precise control of the flash evaporation efficiency of the slurry. At the same time, the liquid discharging unit can be adapted to flash evaporation equipment with multiple powers, and has a wide adaptability.

[0016] In this application, liquid distribution is carried out in the flash evaporation tank body, and then multiple liquid discharging units are adapted. At the same time, the liquid distribution heat exchange pipe can heat up the flash evaporation waste steam passing through the demister to reach the saturation temperature, ensuring precise control of the output temperature of the flash evaporation waste steam.

[0017] The present application realizes the unidirectional driving of the rack to the drainage unit by means of a worm gear meshing transmission. The drainage unit cannot drive the rack in the reverse direction. At the same time, a gravity block is provided on the gravity tube to ensure that the horizontal liquid outlet always maintains a horizontal position and the drainage direction of the horizontal liquid outlet will not change due to the rotation of the liquid-passing swing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic structural diagram of the flash unit of the present invention; Figure 3 It is a schematic structural diagram of the liquid discharge unit of the present invention.

[0019] The reference numerals are: flash unit 1, flash tank 11, liquid inlet pipe 12, liquid separation heat exchange pipe 13, liquid collecting pipeline 14, liquid discharge unit 15, buoyancy worm gear reducer 151, reducer housing 1511, first gear 1512, driven shaft 1513, worm 1514, second gear 1515, worm wheel 1516, buoyancy drive rack 1517, rack 15171, float 1 5172, counterweight block 15173, gear set 1518, connecting chamber 1519, flange 1520, hollow infusion shaft 152, liquid passing swing arm 153, drain pipe 154, drain port 155, gravity pipe 156, horizontal liquid outlet 157, gravity block 158, liquid distribution pipe 16, demister 17, liquid outlet pipe 18, inspection port 19, liquid level meter 20, heat pump unit 2, steam channel 3. DETAILED DESCRIPTION

[0020] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0021] like Figures 1 to 3As shown, a phase change heat carrier direct drive heat pump system comprises: a flash unit 1, the flash unit 1 provides steam for the heat pump unit 2 through a steam channel 3, the flash unit 1 comprises: a flash tank 11, a liquid inlet pipe 12 is arranged in the flash tank 11, both sides of the liquid inlet pipe 12 are connected to the liquid collecting pipeline 14 located on both sides of the liquid inlet pipe 12 through a plurality of liquid separation heat exchange pipes 13 arranged in parallel, the liquid collecting pipeline 14 is respectively connected to a plurality of liquid discharge units 15 arranged on the inner wall of the flash tank 11 through a plurality of liquid separation pipes 16, the liquid discharge unit 15 is used to discharge liquid to the space above the liquid surface in the flash tank 11 and to discharge liquid to the space below the liquid surface in the flash tank 11. A demister 17 is arranged in the flash unit 1, and the demister 17 is located between the liquid discharge unit 15 and the liquid separation heat exchange pipe 13. The liquid separation heat exchange pipe 13 is arranged in a multi-layer rectangular array. The drainage unit 15 includes a buoyancy worm gear reducer 151 , one end of a hollow infusion shaft 152 on the buoyancy worm gear reducer 151 is connected to the liquid dispensing tube 16 , and the other end of the hollow infusion shaft 152 is connected to the drainage tube 154 via a liquid passing swing arm 153 . The buoyancy worm gear reducer 151 includes: a reducer housing 1511, the hollow infusion shaft 152 is installed in the reducer housing 1511 through a bearing, a first gear 1512 is arranged on the hollow infusion shaft 152, a driven shaft 1513 and a worm 1514 are rotatably arranged in the reducer housing 1511, a second gear 1515 and a worm wheel 1516 are arranged on the driven shaft 1513, the first gear 1512 is meshed with the second gear 1515 for transmission, the worm wheel 1516 is meshed with the worm 1514 for transmission, a buoyancy drive rack 1517 is inserted through the reducer housing 1511, and the buoyancy drive rack 1517 is connected to the worm 1514 through a gear set 1518. The buoyancy driven rack 1517 comprises: a rack 15171, the rack 15171 is inserted in the reducer housing 1511, and a float 15172 and a counterweight 15173 are installed on the rack 15171. A connecting cavity 1519 is arranged in the reducer housing 1511, one end of the hollow infusion shaft 152 is placed in the connecting cavity 1519, a flange 1520 for closing the connecting cavity 1519 is arranged on the reducer housing 1511, and the liquid dispensing tube 16 is installed on the flange 1520. A plurality of liquid discharge ports 155 are arranged on the side wall of the liquid discharge pipe 154. A gravity pipe 156 is arranged on the liquid discharge pipe 154 through a sealing bearing sleeve, and the closed end of the gravity pipe 156 is axially limited by a bolt, and a plurality of horizontal liquid outlets 157 are arranged on the gravity pipe 156, and a gravity block 158 is arranged on the gravity pipe 156. The flash unit 1 is provided with a liquid outlet pipe 18 , an inspection port 19 and a liquid level meter 20 .

[0022] Among them, the flash unit 1 is the key part of the whole heat pump system, providing steam for the heat pump unit 2 and playing a core role in the waste heat recovery process. It is mainly composed of flash tank 11, liquid inlet pipe 12, liquid separation heat exchange pipe 13, liquid collecting pipeline 14, liquid discharge unit 15, demister 17, liquid outlet pipe 18, inspection port 19 and liquid level meter 20 and other parts.

[0023] The flash tank 11, as the outer shell of the flash unit 1, provides a closed space for the internal flash process, ensuring that the slurry is flashed under a specific environment. It can withstand a certain pressure and temperature to ensure the safety and stability of the system. At the same time, the structural design of the tank also provides basic support for the installation and layout of other components, so that the entire flash unit 1 forms an organic whole.

[0024] The liquid inlet pipe 12 is responsible for introducing the slurry to be flashed into the flash tank 11. It is the channel for the slurry to enter the flash unit 1. The design of its position and pipe diameter affects the entry speed and flow distribution of the slurry. A reasonable design of the liquid inlet pipe 12 can make the slurry enter the subsequent liquid separation heat exchange pipe 13 evenly, providing good conditions for the subsequent flash process.

[0025] The liquid separation heat exchange tube 13 is arranged in a multi-layer rectangular array and has multiple functions. On the one hand, it evenly distributes the slurry in the liquid inlet pipe 12 to the liquid collecting pipeline 14, ensuring that the slurry is more evenly distributed in the flash tank, increasing the contact area between the slurry and the flash space, and facilitating the full progress of the flash process. On the other hand, it can also raise the temperature of the flash exhaust steam passing through the demister 17 to reach the saturation temperature. This process not only improves the quality of the flash exhaust steam, but also ensures the precise control of the flash exhaust steam temperature output, providing a guarantee for the efficient operation of the subsequent heat pump unit 2.

[0026] The liquid collecting pipeline 14 connects the liquid separation heat exchange pipe 13 and the liquid separation pipe 16, and plays the role of collecting and transporting the slurry. It gathers the slurry distributed by the liquid separation heat exchange pipe 13, and then transports it to each liquid discharge unit 15 through the liquid separation pipe 16, ensuring that the slurry can accurately reach the position required for flash evaporation, maintaining the continuity and stability of the flash evaporation process.

[0027] The drainage unit 15 is a key component for achieving precise control of the flash evaporation efficiency. It can drain liquid into the space above the liquid surface and the space below the liquid surface in the flash evaporation tank body 11. By controlling the number of the above-liquid and below-liquid drainage units 15, and the distance between the drainage port of the below-liquid drainage unit 15 and the liquid surface, precise adjustment of the slurry flash evaporation efficiency can be achieved. This design enables the drainage unit 15 to adapt to flash evaporation equipment of different powers and has a wide range of adaptability. In addition, the drainage unit 15 also includes a buoyancy worm gear reducer 151, a hollow infusion shaft 152, a liquid swing arm 153, a drainage pipe 154, a gravity pipe 156 and other sub-components, which work together to further enhance the function of the drainage unit 15.

[0028] The buoyancy worm gear reducer 151 is the core transmission component of the drainage unit 15, and is mainly composed of a reducer housing 1511, a first gear 1512, a driven shaft 1513, a worm 1514, a second gear 1515, a worm wheel 1516, a buoyancy drive rack 1517, and a gear set 1518. It uses the meshing transmission mode of the worm gear to realize the unidirectional drive of the rack to the drainage unit 15, prevent the drainage unit 15 from driving the rack in the reverse direction, and ensure the stability and reliability of the transmission. At the same time, through the movement of the buoyancy drive rack 1517, the operation of the entire drainage unit 15 is driven to realize the automatic control of the drainage function.

[0029] One end of the hollow infusion shaft 152 is connected to the liquid dispensing tube 16, and the other end is connected to the drainage tube 154 through the liquid swing arm 153. It is not only a channel for slurry delivery, but also realizes the rotation of the drainage tube 154 under the drive of the buoyancy worm gear reducer 151, thereby adjusting the direction and position of the drainage. The hollow design not only meets the needs of slurry delivery, but also reduces the weight of the shaft and reduces energy consumption.

[0030] The liquid-passing swing arm 153 connects the hollow infusion shaft 152 and the drainage tube 154. When the hollow infusion shaft 152 rotates, the drainage tube 154 is driven to swing, so that the drainage tube 154 can discharge liquid at different positions, which increases the flexibility and coverage of the discharge and helps to improve the flash evaporation efficiency.

[0031] A plurality of drain ports 155 are provided on the side wall of the drain pipe 154 for discharging the slurry into the corresponding space in the flash tank 11. The distribution and size of the drain ports 155 affect the discharge speed and flow rate of the slurry, and thus affect the flash evaporation efficiency. By reasonably designing the parameters of the drain ports 155, fine control of the flash evaporation process can be achieved.

[0032] The liquid discharge pipe 154 is provided with a gravity pipe 156 through a sealed bearing sleeve, and the closed end of the gravity pipe 156 is axially limited by a bolt, and a plurality of horizontal liquid outlets 157 are provided on the pipe, and a gravity block 158 is installed. The main function of the gravity pipe 156 is to ensure that the horizontal liquid outlet 157 always maintains a horizontal position, and the liquid discharge direction will not be changed due to the rotation of the liquid-passing swing arm 153. This design ensures that the slurry can be stably discharged from the horizontal liquid outlet 157, thereby improving the stability and uniformity of the flash evaporation.

[0033] The demister 17 is located between the liquid discharge unit 15 and the liquid separation heat exchange pipe 13, and is used to remove the liquid droplets carried in the flash steam. It effectively reduces the liquid drop content in the steam exhaust, reduces the load of the subsequent equipment, and improves the quality of the steam. At the same time, it reduces the heat exchange between the liquid droplets and the steam exhaust, avoids the reduction of the steam exhaust temperature, ensures the heat exchange effect, and improves the overall efficiency of the system.

[0034] The liquid outlet pipe 18 is used to discharge the treated liquid in the flash evaporation unit 1, maintain the liquid level in the flash evaporation tank 11 stable, and ensure the normal progress of the flash evaporation process. It is the channel for the liquid in the flash evaporation unit 1 to be discharged. The design of its pipe diameter and position needs to consider the flow rate and pressure of the liquid to ensure that the liquid can be discharged smoothly.

[0035] The inspection port 19 provides a passage for the staff to enter the flash tank 11 for equipment inspection, maintenance and repair. After the system has been running for a period of time, the internal parts can be inspected through the inspection port 19, and faults can be found and handled in time to ensure the long-term stable operation of the system.

[0036] The liquid level meter 20 is used to monitor the liquid level in the flash tank 11 in real time. Through the information fed back by the liquid level meter 20, the operator can adjust the liquid inlet and outlet in time to maintain the stability of the liquid level in the flash tank 11, and avoid the flash effect and the normal operation of the system affected by the liquid level being too high or too low.

[0037] The steam channel 3 connects the flash unit 1 and the heat pump unit 2, and is the channel for the steam generated by the flash unit 1 to be transported to the heat pump unit 2. It ensures that the steam can be smoothly transmitted from the flash unit 1 to the heat pump unit 2, provides a stable heat source for the heat pump unit 2, and is an important connecting component for realizing waste heat recovery. Its parameters such as pipe diameter, material and thermal insulation performance will affect the steam transmission efficiency and heat loss. Reasonable design of the steam channel 3 can improve the overall performance of the system.

[0038] Working process: Slurry input and distribution: The slurry to be processed enters the flash tank 11 through the liquid inlet pipe 12. Multiple liquid separation heat exchange tubes 13 arranged in parallel are connected on both sides of the liquid inlet pipe 12. These liquid separation heat exchange tubes 13 are arranged in a multi-layer rectangular array and can evenly disperse the slurry. When the slurry flows in the liquid separation heat exchange tubes 13, it conducts preliminary heat exchange with the surrounding environment to prepare for subsequent flash evaporation. Subsequently, the dispersed slurry flows into the liquid collection pipelines 14 located on both sides of the liquid inlet pipe 12. The liquid collection pipelines 14 play the role of gathering the slurry, and then the slurry is transported to multiple drainage units 15 through multiple liquid separation pipes 16.

[0039] Flash evaporation process: The drainage unit 15 is a key executive component of the flash evaporation process. The buoyancy worm gear reducer 151 in the drainage unit 15 starts working under the action of the buoyancy drive rack 1517. The buoyancy drive rack 1517 is equipped with a float 15172 and a counterweight 15173. When the liquid level in the flash evaporation tank 11 changes, the buoyancy of the float 15172 changes, driving the rack 15171 to move. The rack 15171 is connected to the worm 1514 through the gear set 1518, thereby driving the worm 1514 to rotate, and the hollow infusion shaft 152 is rotated through the transmission of the worm gear 1516 and the driven shaft 1513. One end of the hollow infusion shaft 152 is connected to the liquid distribution tube 16, and the other end is connected to the drainage tube 154 through the liquid swing arm 153. The rotation of the hollow infusion shaft 152 drives the drainage tube 154 to swing.

[0040] Flashing above liquid: the discharge pipe 154 changes with the liquid level, and the position of the discharge port 155 to the demister is always maintained, and the discharge port 155 discharges the slurry to the space above the liquid surface in the flash tank 11. The slurry flashes rapidly in this space, and turns into steam and rises.

[0041] Submerged flash evaporation: The liquid pipe 154 changes with the liquid level, and the position of the discharge port 155 to the liquid level is always maintained. The discharge pipes 154 of some discharge units 15 can also discharge the slurry to the space below the liquid level. The newly-incoming slurry exchanges heat with the slurry on the liquid surface, and the slurry on the liquid surface reaches the flash evaporation temperature, and then flash evaporation is performed to generate steam exhaust steam. By controlling the number of the above-liquid and submerged discharge units 15, and the distance between the discharge port of the submerged discharge unit 15 and the liquid level, the slurry flash evaporation efficiency can be precisely controlled.

[0042] Steam processing and transportation: The steam exhaust produced by flash evaporation contains droplets, which rise through the demister 17. The demister 17 is located between the drainage unit 15 and the liquid separation heat exchange tube 13, which can effectively intercept the droplets in the steam, reduce the moisture content in the steam, and improve the quality of the steam. The steam after demistering continues to rise and contacts the liquid separation heat exchange tube 13 arranged in a multi-layer rectangular array. The liquid separation heat exchange tube 13 heats the steam to reach the saturation temperature to ensure accurate control of the steam temperature output. Finally, the steam that meets the requirements is transported to the heat pump unit 2 through the steam channel 3.

[0043] Subsequent processing and system monitoring: During the flash process, the remaining liquid in the flash tank 11 is discharged through the liquid outlet pipe 18 to maintain the stability of the liquid level in the tank. The liquid level meter 20 monitors the liquid level height in the flash tank 11 in real time. Once the liquid level is abnormal, the operator can adjust the liquid inlet or outlet in time according to the information fed back by the liquid level meter. In addition, the system is equipped with an inspection port 19 to facilitate the staff to regularly inspect, maintain and repair the components inside the flash unit 1 to ensure the long-term stable operation of the system. The steam entering the heat pump unit 2 realizes heat transfer and lifting under the action of the heat pump, which is used to meet the heat needs of various industries or life, and completes the waste heat recovery process of the entire phase change heat carrier direct-drive heat pump system.

[0044] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A phase-change heat carrier direct-drive heat pump system, comprising: A flash unit (1), the flash unit (1) providing steam for a heat pump unit (2) via a steam channel (3), characterized in that the flash unit (1) comprises: a flash tank body (11), a liquid inlet pipe (12) being arranged in the flash tank body (11), both sides of the liquid inlet pipe (12) being connected to a liquid collecting pipeline (14) located on both sides of the liquid inlet pipe (12) via a plurality of liquid separation heat exchange pipes (13) arranged in parallel, the liquid collecting pipeline (14) being connected to a plurality of liquid discharge units (15) arranged on the inner wall of the flash tank body (11) via a plurality of liquid separation pipes (16), the liquid discharge units (15) being used to discharge liquid into a space above the liquid surface in the flash tank body (11) and to discharge liquid into a space below the liquid surface in the flash tank body (11).

2. The phase change heat carrier direct drive heat pump system according to claim 1, characterized in that: A demister (17) is provided in the flash unit (1), and the demister (17) is located between the liquid discharge unit (15) and the liquid separation heat exchange pipe (13).

3. The phase change heat carrier direct drive heat pump system according to claim 1, characterized in that: The liquid separation heat exchange tubes (13) are arranged in a multi-layer rectangular array.

4. The phase change heat carrier direct drive heat pump system according to claim 1, characterized in that: The liquid discharge unit (15) comprises a buoyancy worm gear reducer (151), one end of a hollow infusion shaft (152) on the buoyancy worm gear reducer (151) being connected to a liquid dispensing tube (16), and the other end of the hollow infusion shaft (152) being connected to a liquid discharge tube (154) via a liquid-passing swing arm (153).

5. The phase-change heat carrier direct-drive heat pump system according to claim 4, characterized in that: The buoyancy worm gear reducer (151) comprises: a reducer housing (1511), the hollow infusion shaft (152) being mounted in the reducer housing (1511) via a bearing, the hollow infusion shaft (152) being provided with a first gear (1512), a driven shaft (1513) and a worm (1514) being rotatably arranged in the reducer housing (1511), a second gear (1515) and a worm wheel (1516) being provided on the driven shaft (1513), the first gear (1512) meshingly transmitting with the second gear (1515), the worm wheel (1516) meshingly transmitting with the worm (1514), a buoyancy drive rack (1517) being inserted through the reducer housing (1511), and the buoyancy drive rack (1517) being connected to the worm (1514) via a gear set (1518).

6. The phase-change heat carrier direct-drive heat pump system according to claim 4, characterized in that: The buoyancy-driven rack (1517) comprises a rack (15171), the rack (15171) is inserted into the reducer housing (1511), and a float (15172) and a counterweight (15173) are mounted on the rack (15171).

7. The phase-change heat carrier direct-drive heat pump system according to claim 5, characterized in that: A connecting cavity (1519) is provided in the reducer housing (1511), one end of the hollow infusion shaft (152) is placed in the connecting cavity (1519), a flange (1520) for closing the connecting cavity (1519) is provided on the reducer housing (1511), and the liquid dispensing tube (16) is mounted on the flange (1520).

8. The phase-change heat carrier direct-drive heat pump system according to claim 4, characterized in that: A plurality of liquid discharge ports (155) are provided on the side wall of the liquid discharge pipe (154).

9. The phase-change heat carrier direct-drive heat pump system according to claim 8, characterized in that: A gravity tube (156) is mounted on the liquid discharge tube (154) via a sealed bearing sleeve; the closed end of the gravity tube (156) is axially limited by a bolt; a plurality of horizontal liquid outlets (157) are arranged on the gravity tube (156); and a gravity block (158) is arranged on the gravity tube (156).

10. The phase-change heat carrier direct-drive heat pump system according to claim 1, characterized in that: The flash unit (1) is provided with a liquid outlet pipe (18), an inspection port (19) and a liquid level meter (20).

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