A magnetic levitation centrifugal heat pump unit

Abstract

This utility model discloses a magnetic levitation centrifugal heat pump unit, belonging to the technical field of heat pump units. It includes a centrifugal compressor. One side of the centrifugal compressor is connected to a hot water tank via a connecting pipe one. One side of the hot water tank is connected to an expansion valve via a connecting pipe two. One side of the expansion valve is connected to an evaporator via a connecting pipe three. One side of the evaporator is connected to a refrigerant tank via a connecting pipe four. One side of the refrigerant tank is connected to the centrifugal compressor via a connecting pipe five. This utility model uses a centrifugal compressor, which can greatly reduce the friction between the pump shaft and the pump casing under high-speed rotation, reduce the mechanical wear of the centrifugal compressor, improve its service life, increase its working efficiency, reduce its energy consumption, and thus reduce the operating cost of the heat pump unit.

Description

Technical Field

[0001] This utility model relates to the field of heat pump unit technology, specifically to a magnetic levitation centrifugal heat pump unit. Background Technology

[0002] A heat pump unit is a high-efficiency energy device that transfers heat from a low-temperature environment to a high-temperature environment based on the reverse Carnot cycle principle. It is widely used in heating, cooling, and hot water supply. During winter operation, the unit extracts heat from outdoor air, ground source, or water source, pressurizes and heats it through a compressor, and then releases it indoors, achieving efficient heating in low-temperature environments. In summer, the cycle reverses, expelling indoor heat to the outside, thus also providing cooling. Application scenarios include district heating, industrial waste heat recovery, and data center cooling, making it a key piece of equipment for building energy conservation and clean energy transformation, representing the future technological direction of energy utilization.

[0003] Centrifugal compressors compress gas using centrifugal force generated by the high-speed rotation of an impeller, offering high flow rates and wide adaptability to various operating conditions. A single centrifugal compressor can provide tens to hundreds of megawatts of cooling / heating output, meeting the needs of large-scale projects.

[0004] Centrifugal compressors can greatly enhance the refrigerant compression efficiency during the operation of heat pump units. However, due to the high speed of centrifugal compressors, mechanical friction and wear are serious problems, leading to increased energy consumption and shorter lifespan. Therefore, a heat pump unit that can reduce energy consumption is needed to improve the working efficiency of centrifugal compressors and reduce the operating cost of heat pump units. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a magnetic levitation centrifugal heat pump unit.

[0006] The technical solution of this utility model is: a magnetic levitation centrifugal heat pump unit, including a centrifugal compressor, a hot water tank connected to one side of the centrifugal compressor through a connecting pipe one, an expansion valve connected to one side of the hot water tank through a connecting pipe two, an evaporator connected to one side of the expansion valve through a connecting pipe three, a refrigerant tank connected to one side of the evaporator through a connecting pipe four, and a refrigerant tank connected to the centrifugal compressor through a connecting pipe five.

[0007] Furthermore, the centrifugal compressor includes a pump casing, a plurality of impellers are provided in the middle of the pump casing, a pump shaft is provided in the middle of the impellers, a motor for driving the pump shaft to rotate is provided at one end of the pump shaft, a plurality of magnetic grooves I are provided on both outer walls of the pump shaft, a strong magnet I is provided in each of the plurality of magnetic grooves I, a plurality of magnetic grooves II are provided on the outer side of the strong magnet I, a plurality of strong magnets II are provided in each of the plurality of magnetic grooves II, an air inlet I is provided at the bottom of the pump casing and connected to the connecting pipe V, and an air outlet I is provided at the top of the pump casing and connected to the hot water tank.

[0008] Explanation: A centrifugal compressor compresses a low-temperature gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The refrigerant then exchanges heat with the water in the water tank, heating the water in the hot water tank.

[0009] Furthermore, the evaporator includes an evaporation shell, an air inlet on one side of the evaporation shell, an air outlet on the other side of the evaporation shell, an exhaust fan at the air outlet, and a heat exchange tube inside the evaporation shell.

[0010] Explanation: The refrigerant in its lower gaseous state exchanges heat with the hot air through heat exchange tube 1 in the evaporator, thereby raising the temperature of the refrigerant.

[0011] Furthermore, the hot water tank includes a tank body, inside which is provided a heat exchange pipe second that is connected to the connecting pipe first, the other end of the heat exchange pipe second being connected to the connecting pipe second, the top of the tank body is provided with a water inlet, and the bottom of the tank body is provided with a water outlet.

[0012] Explanation: The heat of the high-temperature and high-pressure gaseous refrigerant is exchanged with the water in the hot water tank through heat exchange tube 2. As the temperature of the refrigerant decreases, the refrigerant liquefies into liquid refrigerant.

[0013] Furthermore, the refrigerant tank is equipped with a pressure gauge and a refrigerant charging port.

[0014] Instructions: Detect the refrigerant content in the refrigerant tank using a pressure gauge, and add refrigerant to the tank through the refrigerant adding interface.

[0015] The beneficial effects of this utility model are: This invention uses a centrifugal compressor, which can greatly reduce the friction between the pump shaft and the pump casing under high-speed rotation, reduce the mechanical wear of the centrifugal compressor, improve the service life of the centrifugal compressor, improve the working efficiency of the compressor, reduce the energy consumption of the compressor, and thus reduce the operating cost of the heat pump unit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the centrifugal compressor of this utility model.

[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0019] Among them, 1-centrifugal compressor, 2-connecting pipe one, 3-hot water tank, 4-connecting pipe two, 5-expansion valve, 6-connecting pipe three, 7-evaporator, 8-connecting pipe four, 9-refrigerant tank, 10-connecting pipe five, 11-pump casing, 12-impeller, 13-pump shaft, 14-motor, 15-magnetic slot one, 16-strong magnet one, 17-magnetic slot two, 18-strong magnet two, 111-air inlet one, 112-air outlet one, 71-evaporator shell, 72-air inlet two, 73-air outlet two, 74-exhaust fan, 75-heat exchange tube one, 31-box body, 32-heat exchange tube two, 33-water inlet, 34-water outlet, 91-pressure gauge, 92-refrigerant charging port. Detailed Implementation

[0020] Example 1: like Figure 1 As shown, a magnetic levitation centrifugal heat pump unit includes a centrifugal compressor 1. One side of the centrifugal compressor 1 is connected to a hot water tank 3 via a connecting pipe 2. One side of the hot water tank 3 is connected to an expansion valve 5 via a connecting pipe 4. One side of the expansion valve 5 is connected to an evaporator 7 via a connecting pipe 6. One side of the evaporator 7 is connected to a refrigerant tank 9 via a connecting pipe 8. One side of the refrigerant tank 9 is connected to the centrifugal compressor 1 via a connecting pipe 10.

[0021] like Figure 2 , Figure 3 As shown, the centrifugal compressor 1 includes a pump casing 11, with multiple impellers 12 in the middle of the pump casing 11, and a pump shaft 13 in the middle of the impellers 12. One end of the pump shaft 13 is equipped with a motor 14 for driving the pump shaft 13 to rotate. Multiple magnetic grooves 15 are provided on both outer walls of the pump shaft 13. Each magnetic groove 15 contains a strong magnet 16. Several magnetic grooves 17 are provided on the outer side of the strong magnet 16 on the pump casing 11. Each magnetic groove 17 contains a strong magnet 18. An air inlet 111 is provided at the bottom of the pump casing 11, which is connected to the connecting pipe 10. An air outlet 112 is provided at the top of the pump casing 11, which is connected to the hot water tank 3.

[0022] The centrifugal compressor 1 compresses the low-temperature gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, and the refrigerant exchanges heat with the water in the water tank 3 to heat the water in the hot water tank 3.

[0023] The evaporator 7 includes an evaporator shell 71, an air inlet 72 on one side of the evaporator shell 71, an air outlet 73 on the other side of the evaporator shell 71, an exhaust fan 74 at the air outlet 73, and a heat exchange tube 75 inside the evaporator shell 71.

[0024] The refrigerant in the lower gaseous state exchanges heat with the hot air through the heat exchange tube 75 in the evaporator 7, thereby raising the temperature of the refrigerant.

[0025] The hot water tank 3 includes a tank body 31. Inside the tank body 31, there is a heat exchange pipe 2 32 that is connected to the connecting pipe 2. The other end of the heat exchange pipe 2 32 is connected to the connecting pipe 4. The top of the tank body 31 is provided with a water inlet 33, and the bottom of the tank body 31 is provided with a water outlet 34.

[0026] The heat of the high-temperature, high-pressure gaseous refrigerant is exchanged with the water in the hot water tank 3 through heat exchange tube 2 32. As the temperature of the refrigerant decreases, the refrigerant liquefies into liquid refrigerant.

[0027] The refrigerant tank 9 is equipped with a pressure gauge 91 and a refrigerant charging port 92.

[0028] The refrigerant content in the refrigerant tank 9 is detected by the pressure gauge 91, and refrigerant is added to the refrigerant tank 9 through the refrigerant adding interface 92.

[0029] The working principle of the above embodiment 1: Motor 14 drives the pump shaft to rotate, which in turn drives impeller 12 to rotate, compressing the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure refrigerant. The high-temperature, high-pressure refrigerant enters the hot water tank 3 through connecting pipe 2 and exchanges heat with the cold water in the tank 3 through heat exchange pipe 32. During the heat exchange process, due to the high boiling point of the high-pressure refrigerant, as the refrigerant temperature decreases, it forms a high-pressure liquid refrigerant. This high-pressure liquid refrigerant passes through connecting pipe 4 and enters the expansion valve 5. Due to the decrease in refrigerant pressure, the boiling point of the refrigerant decreases, causing the liquid refrigerant to vaporize and absorb heat, forming a low-temperature liquid refrigerant. Low-temperature, low-pressure gaseous refrigerant enters the heat exchange tube 75 in the evaporator 7 through connecting pipe 36, causing the temperature of the hot air to drop while the temperature of the low-temperature, low-pressure gaseous refrigerant rises. Then, it enters the centrifugal compressor 1 through connecting pipe 48, refrigerant tank 9, and connecting pipe 510, forming a cycle. The hot water tank 1 is connected to a cold water source through water inlet 33, and the hot water tank 1 is connected to a hot water drain pipe through water outlet 34. The refrigerant content is monitored through pressure gauge 91, and refrigerant is added to the refrigerant tank 9 through refrigerant addition interface 92.

[0030] In the above embodiments, the motor 14, expansion valve 5, strong magnet 16, and strong magnet 2 18 are all commercially available products. As long as they can achieve the function of this utility model, they are acceptable. Those skilled in the art can choose to use them based on common sense, and no special limitations are made here.

Claims

1. A magnetically levitated centrifugal heat pump unit, characterized in that, The system includes a centrifugal compressor (1), one side of which is connected to a hot water tank (3) via a connecting pipe 1 (2), one side of which is connected to an expansion valve (5) via a connecting pipe 2 (4), one side of which is connected to an evaporator (7) via a connecting pipe 3 (6), one side of which is connected to a refrigerant tank (9) via a connecting pipe 4 (8), and one side of which is connected to the centrifugal compressor (1) via a connecting pipe 5 (10). The centrifugal compressor (1) includes a pump casing (11), a plurality of impellers (12) are provided in the middle of the pump casing (11), a pump shaft (13) is provided in the middle of the impellers (12), a motor (14) is provided at one end of the pump shaft (13) for driving the pump shaft (13) to rotate, a plurality of magnetic grooves (15) are provided on both sides of the outer wall of the pump shaft (13), a strong magnet (16) is provided in each of the plurality of magnetic grooves (15), a plurality of magnetic grooves (17) are provided on the outer side of the strong magnet (16) of the pump casing (11), a plurality of magnetic grooves (18) are provided in each of the plurality of magnetic grooves (17), an air inlet (111) is provided below the pump casing (11) and communicates with the connecting pipe (10), and an air outlet (112) is provided above the pump casing (11) and communicates with the hot water tank (3).

2. The magnetic levitation centrifugal heat pump unit as described in claim 1, characterized in that, The evaporator (7) includes an evaporating shell (71), an air inlet (72) is provided on one side of the evaporating shell (71), an air outlet (73) is provided on the other side of the evaporating shell (71), an exhaust fan (74) is provided at the air outlet (73), and a heat exchange tube (75) is provided inside the evaporating shell (71).

3. The magnetic levitation centrifugal heat pump unit as described in claim 1, characterized in that, The hot water tank (3) includes a tank body (31), inside which is provided a heat exchange pipe (32) connected to the connecting pipe (2), and the other end of the heat exchange pipe (32) is connected to the connecting pipe (4). The top of the tank body (31) is provided with a water inlet (33), and the bottom of the tank body (31) is provided with a water outlet (34).

4. A magnetic levitation centrifugal heat pump unit as described in claim 1, characterized in that, The refrigerant tank (9) is equipped with a pressure gauge (91) and a refrigerant adding interface (92).

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