Magnetic suspension centrifugal heat pump system

Abstract

The magnetic suspension centrifugal heat pump system is characterized in that an evaporator inlet for inputting a liquid working medium is formed in the lower end of an evaporator, and evaporator outlets for outputting a gaseous working medium are symmetrically formed in the upper end of the evaporator; the compressor assembly is arranged above the evaporator and comprises a first-stage compressor and a second-stage compressor which are arranged in the vertical direction and connected in series, and volutes on the two sides of the first-stage compressor are connected with an outlet of the evaporator. The condenser is located between the first-stage compressor and the second-stage compressor, a condenser inlet allowing a gaseous working medium to flow in is formed in the condenser, and the condenser inlet is connected with volutes on the two sides of the second-stage compressor; the gaseous working medium flows upwards, is compressed by the first-stage compressor and the second-stage compressor and then flows downwards into the condenser, and heating water flowing into the condenser is heated. According to the magnetic suspension centrifugal heat pump system, the two stages of compressors do work at equal power, the utilization rate and the circulation efficiency of a working medium are guaranteed, and an additional air supplementing pipeline is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of heating systems, and in particular to a magnetic suspension centrifugal heat pump system. Background Art

[0002] Heat pump units have the advantages of being clean, environmentally friendly, energy-saving and efficient. In recent years, they have been more and more widely used in large-scale central heating systems. In existing heat pump units, the circulation efficiency of the refrigerant is low, resulting in low operating energy efficiency of the heat pump unit. Therefore, how to improve the circulation efficiency of the refrigerant is the key to improving the performance of the heat pump unit.

[0003] Patent CN117515957A discloses a heat pump system, in which the flash assembly makes the air supply of the two compressors more reasonable, improves the utilization rate of the refrigerant, improves the circulation efficiency of the refrigerant, and thus improves the operating energy efficiency of the heat pump system. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problems of low refrigerant utilization and circulation efficiency in the prior art, the present invention provides a magnetic levitation centrifugal heat pump system, which adopts a two-stage compressor with equal power to do work, ensures the utilization rate and circulation efficiency of the working fluid, and does not require an additional air supply pipeline.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a magnetic suspension centrifugal heat pump system, comprising: An evaporator, wherein the lower end of the evaporator is provided with an evaporator inlet for inputting a liquid working medium, and the upper end of the evaporator is symmetrically provided with an evaporator outlet for outputting a gaseous working medium; A compressor assembly, the compressor assembly is arranged above the evaporator, the compressor assembly comprises a primary compressor and a secondary compressor arranged in a vertical direction and connected in series, and the volutes on both sides of the primary compressor are connected to the evaporator outlet; A condenser located on one side of the compressor assembly, the height of the condenser being between the primary compressor and the secondary compressor, the condenser being provided with a condenser inlet for the gaseous working medium to flow in, the condenser inlet being connected to the volutes on both sides of the secondary compressor; The gaseous working medium flows upward and is compressed by the primary compressor and the secondary compressor, and then flows downward into the condenser, and heats the heating water flowing into the condenser.

[0006] The magnetic levitation centrifugal heat pump system of the present invention ensures that the flow rate and temperature of the gaseous working medium entering the two sides of the compressor assembly are equal or similar by symmetrically arranged evaporator outlets, and adopts a first-stage compressor and a second-stage compressor to ensure that the compressors work with equal power, thereby improving the working medium circulation efficiency and utilization rate.

[0007] Furthermore, in order to ensure that the gaseous working fluid entering the compressor assembly can flow into the condenser evenly, the first volutes on both sides of the first-stage compressor are connected to the evaporator outlet through a first pipeline extending upward, and the second volutes on both sides of the second-stage compressor are connected to the condenser inlet through a second pipeline extending downward, and the first volute and the second volute on the same side are connected by a third pipeline arranged upward.

[0008] Furthermore, in order to avoid surge after shutdown, the third pipeline is connected to a first reflux pipeline for reflux of gaseous working medium, the first reflux pipeline extends vertically downward and is connected to the reflux interface of the evaporator, and a solenoid valve is provided on the first reflux pipeline.

[0009] Furthermore, in order to ensure that the temperature and flow rate of the gaseous working medium entering the evaporator outlets on both sides are the same, the evaporator outlets are symmetrically arranged in the tube path of the evaporator, and the reflux interface is located at the center of the two evaporator outlets.

[0010] Furthermore, the distance between the centers of the two evaporator outlets is 2000 mm, the distance between the center of the left evaporator outlet and the left side of the evaporator shell is 600 mm, and the distance between the center of the right evaporator outlet and the left side of the evaporator shell is 400 mm.

[0011] Further, in order to optimize the flow path of the gaseous working medium, the first volute is arranged vertically, and the second volute is arranged horizontally.

[0012] Furthermore, in order to prevent the liquid working medium from remaining in the compressor, a second reflux pipeline for reflux of the liquid working medium is connected below the first volute, and the second reflux pipeline is connected to the evaporator.

[0013] Furthermore, in order to connect the first compressor and the second compressor, the primary compressor is connected to the evaporator via a bracket, and the secondary compressor is connected to the condenser via a bracket.

[0014] Furthermore, in order to further utilize the heat of the liquid refrigerant flowing out of the condenser, the lower end of the condenser is connected to a condenser outlet for outputting the condensed working fluid, a third reflux pipeline is connected between the condenser outlet and the evaporator, the condenser outlet is connected to the working fluid inlet of the plate heat exchanger through a pipeline, and the working fluid outlet of the plate heat exchanger is connected to the evaporator inlet through an outlet pipeline.

[0015] Furthermore, in order to further heat the heating water, the lower pipe of the plate heat exchanger extends into the condenser and introduces the low-temperature heating water in the condenser. After the heating water of the plate heat exchanger cools the working fluid flowing through the plate heat exchanger, the heating water is discharged from the upper pipe.

[0016] Furthermore, the condenser is provided with a heating water inlet and a heating water outlet, and part of the low-temperature heating water flowing into the heating water inlet enters the plate heat exchanger from the lower pipeline.

[0017] Furthermore, in order to avoid boiling of the liquid working medium in the evaporator and ensure that the liquid working medium enters the first-stage compressor evenly, the evaporator is provided with a liquid distribution plate located at the upper end of the evaporator inlet, and the upper end of the liquid distribution plate is provided with a heat exchange tube group for heating the liquid working medium, and the heat exchange tube group is provided with an air distribution plate located below the evaporator outlet.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The magnetic levitation centrifugal heat pump system of the present invention optimizes the position of the evaporator outlet in the shell process to ensure that the temperature of the gaseous working fluid entering the first-stage compressor from the evaporator outlets on both sides is similar, and utilizes two-stage compressors in series to ensure equal power of the two-stage compressors, thereby optimizing the utilization rate of the gaseous working fluid entering the condenser.

[0019] 2. In the magnetic levitation centrifugal heat pump system of the present invention, the refrigerant flowing out of the condenser is subjected to secondary heat exchange through a plate heat exchanger, and the residual heat of the refrigerant is further used to heat the heating water. The heated heating water flows back to the condenser and the heating water inside it is used together to achieve heating, thereby improving the utilization rate of the refrigerant and optimizing the heating effect of the heating water.

[0020] 3. The magnetic levitation centrifugal heat pump system of the present invention uses the first return pipeline to return the high-pressure gaseous working medium remaining inside to the evaporator when the system is shut down, so as to avoid the working medium remaining in the compressor assembly; when the system is just started, it avoids the liquid working medium generated after the gaseous working medium contacts the pipeline and remains in the volute, thereby improving the circulation efficiency of the refrigerant and eliminating the need for an additional air supply pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the magnetic suspension centrifugal heat pump system of the present invention; Figure 2 for Figure 1 (Parts irrelevant to the present invention are omitted) front view; Figure 3 for Figure 1 (Parts irrelevant to the present invention are omitted) rear view; Figure 4 is a schematic diagram of the structure of the evaporator; Figure 5 is a cross-sectional view of the evaporator; Figure 6 It is a cross-sectional view of the bell flange and the volute; In the figure: 1. evaporator, 101. evaporator inlet, 102. evaporator outlet, 103. liquid distribution plate, 104. heat exchange tube group, 105. gas distribution plate, 106. reflux interface, 2. condenser, 21. condenser inlet, 22. condenser outlet, 23. heating water inlet, 24. heating water outlet, 3. plate heat exchanger, 31. working fluid inlet, 32. working fluid outlet, 33. outlet pipeline, 34. lower pipeline, 35. upper pipeline, 4. primary compressor, 41. first volute, 5. secondary compressor, 51. second volute, 6. first pipeline, 7. second pipeline, 8. third pipeline, 9. first reflux pipeline, 10. second reflux pipeline, 11. third reflux pipeline, 12. flange, 121. closing structure, 122. spiral groove. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figures 1 to 3 As shown, a magnetically suspended centrifugal heat pump system includes: an evaporator 1, a compressor assembly, a condenser 2 and a plate heat exchanger 3.

[0027] like Figure 4As shown, the lower end of the evaporator 1 is provided with an evaporator inlet 101 for inputting liquid working medium, and the upper end of the evaporator 1 is symmetrically provided with an evaporator outlet 102 for outputting gaseous working medium; a liquid distribution plate 103 located at the upper end of the evaporator inlet 101 is provided in the evaporator 1, and the liquid distribution plate 103 can ensure the uniform flow of the incoming liquid working medium. A heat exchange tube group 104 for heating the liquid working medium is provided at the upper end of the liquid distribution plate 103. An air distribution plate 105 located below the evaporator outlet 102 is provided above the heat exchange tube group 104, and the air distribution plate 105 can ensure the uniform flow of the gaseous working medium. The heat source for heating the working medium enters the heat exchange tube group 104 from the inlet on the left side of the evaporator 1, flows through the heat exchange tube group 104, and then flows out from the outlet on the left side of the evaporator 1.

[0028] Specifically, the liquid medium enters the evaporator 1 from the evaporator inlet 101 and exchanges heat with the heat exchange tube group 104. The liquid medium becomes a gaseous medium and flows out from the evaporator outlets 102 on both sides. The evaporator outlets 102 are symmetrically arranged in the tube path of the evaporator 1, and the reflux interface 106 is located at the center of the two evaporator outlets 102.

[0029] like Figure 4 and Figure 5 As shown, preferably, the distance between the centers of the two evaporator outlets 102 is 2000mm, the distance between the center of the left evaporator outlet 102 and the left side of the evaporator shell is 600mm, and the distance between the center of the right evaporator outlet 102 and the left side of the evaporator shell is 400mm. The left side is the side close to the circulating water inlet and outlet of the evaporator 1, and the right side is the side away from the circulating water inlet and outlet of the evaporator 1. In the present invention, the water inlet of the circulating water is arranged side by side at the left end of the evaporator 1 and is led upward. Under this distance setting, the temperature and flow rate of the gaseous working medium entering the evaporator outlets 102 on both sides are similar, ensuring that the gaseous working medium can be evenly diverted into the compressor assembly to avoid boiling of the gaseous working medium at a local position.

[0030] The compressor assembly is arranged above the evaporator 1 and includes a primary compressor 4 and a secondary compressor 5 arranged in series in a vertical direction. The volutes on both sides of the primary compressor 4 are connected to the evaporator outlet 102. The volute of the secondary compressor 5 is connected to the condenser 2.

[0031] Preferably, the first volutes 41 on both sides of the primary compressor 4 are connected to the evaporator outlet 102 through the first pipeline 6 extending upward, and the second volutes 51 on both sides of the secondary compressor 5 are connected to the condenser inlet 21 through the second pipeline 7 extending downward, and the first volutes 41 and the second volutes 51 on the same side are connected through the third pipeline 8 arranged upward. The diameters of the first pipeline 6, the third pipeline 8, and the second pipeline are reduced in equal differences. The first pipeline 6 has the largest diameter, which can ensure that more gaseous working fluid enters the first volute 41, and the gaseous working fluid compressed by the primary compressor enters the third pipeline 8. The relatively reduced diameter of the third pipeline 8 can ensure the flow rate of the gaseous working fluid, and the same applies to the subsequent process.

[0032] The caliber of the inlet of the first volute 41 is larger than the caliber of the outlet of the first volute 41, the caliber of the outlet of the first volute 41 is equal to the caliber of the inlet of the second volute 51, and the caliber of the inlet of the second volute 51 is larger than the caliber of the outlet of the second volute 51. In this way, it can be ensured that the first pipeline 6, the second pipeline 7, and the third pipeline 8 are each equal-diameter pipelines. Specifically, the third pipeline 8 is an S-shaped pipeline, which can reduce the resistance of the gaseous working medium in the third pipeline 8. The first pipeline 6 and the second pipeline 7 are arc-shaped pipelines, which can shorten the stroke of the gaseous working medium and save space at the same time. Especially for the third pipeline 8, after the heating system is shut down, there will be gaseous working medium remaining inside the third pipeline 8. As the gaseous working medium cools down to form liquid working medium, this part of the liquid working medium will flow back into the first volute 41, and then enter the second reflux pipeline 10 and return to the evaporator 1, further avoiding the liquid working medium from remaining in the compressor assembly.

[0033] Specifically, a first-stage compressor is used for explanation, such as Figure 6 As shown, the first volute 41 and the first pipeline 6 are connected by a flange 12, and a closing structure 121 is provided inside the flange 12, and the closing structure 121 faces the first volute 41, and the gaseous working medium can be accelerated through the closing structure 121. At the same time, the end of the flange 12 facing the impeller of the centrifuge has a spiral groove 122, and the spiral groove 122 can prevent the gaseous working medium from contacting the volute and condensing to form a liquid working medium and enter the centrifuge.

[0034] Specifically, the first volute 41 is arranged vertically, and the second volute 51 is arranged horizontally. The gaseous working medium enters the side of the first volute 41 from the first pipeline 6, flows through the first volute 41, enters the third pipeline 8 in the vertical direction, flows through the third pipeline 8, enters the side of the second volute 51, and finally flows downward from the second pipeline 7 arranged in front and behind into the condenser 2. The gaseous working medium first flows upward through the primary compressor 4 and the secondary compressor 5 for compression, and then flows downward into the condenser 2. Since the position of the condenser 2 is lower than the secondary compressor 5, the gaseous working medium will not remain in the volute of the secondary compressor 5.

[0035] Preferably, both the primary compressor 4 and the secondary compressor 5 adopt a combined structure of a centrifuge and a volute. The two centrifuges have the same structure and are both magnetic suspension centrifuges, and the built-in impeller size of a single centrifuge is consistent, and the temperature and flow rate of the gaseous working medium flowing through both sides of the compressor are similar.

[0036] The condenser 2 is located on the side of the compressor assembly. The height of the condenser 2 is between the primary compressor 4 and the secondary compressor 5. The condenser 2 is provided with a condenser inlet 21 for the gaseous working medium to flow in. The condenser inlet 21 is connected to the second volute 51 on both sides of the secondary compressor 5.

[0037] The gaseous working medium flows upward and is compressed by the primary compressor 4 and the secondary compressor 5, and then flows downward into the condenser 2, and heats the heating water flowing into the condenser 2. The condenser 2 is provided with a heating water inlet 23 and a heating water outlet 24. After the heating water enters the condenser 2, the gaseous working medium exchanges heat with it, and the gaseous working medium cools down to a liquid state and then enters the plate heat exchanger 3. The heated heating water flows out from the heating water outlet 24 for heating.

[0038] The lower end of the condenser 2 is connected to a condenser outlet 22 for outputting the condensed working medium. The condenser outlet 22 is connected to the working medium inlet 31 of the plate heat exchanger 3 through a pipeline. The working medium outlet 32 ​​of the plate heat exchanger 3 is connected to the evaporator inlet 101 through an outlet pipeline 33. Since the temperature of the liquid working medium entering the plate heat exchanger 3 is still relatively high, in order to avoid heat waste, part of the low-temperature heating water inside the condenser 2 will enter the plate heat exchanger 3 through the lower pipeline 34. The low-temperature heating water entering the plate heat exchanger 3 performs heat exchange with the liquid working medium flowing through the plate heat exchanger 3, and the liquid working medium is further cooled down, while this part of the low-temperature heating water is heated and then heated up. The heated heating water is used for heating along the upper pipeline 35.

[0039] In particular, the lower pipe 34 extends to a bottom position close to the heating water inlet 23, ensuring that the temperature of the heating water entering the lower pipe 34 is relatively low.

[0040] The liquid working medium is cooled for a second time in the plate heat exchanger 3, and the low-temperature heating water can be heated at the same time, thereby avoiding wasting the heat of the liquid working medium and utilizing the heating water for heating again.

[0041] In other embodiments, the third pipeline 8 is connected to a first return pipeline 9 for reflux of the gaseous working medium, and the first return pipeline 9 is provided with a control valve. The first return pipeline 9 extends vertically downward and is connected to the return interface 106 of the evaporator 1. When the heat pump system is in normal working condition, the control valve is closed, and the gaseous working medium will not flow back to the evaporator 1 from the first return pipeline 9. Since a check valve is provided inside the third pipeline 8 after the heat pump system is shut down, the pressure inside the third pipeline 8 is higher than the pressure of the evaporator 1. In order to avoid surge caused by the residual gaseous working medium, the control valve is opened, and the first return pipeline 9 guides the residual gaseous working medium back to the evaporator 1, and at the same time, it can also prevent the gaseous working medium from becoming a liquid working medium and remaining in the volute as the temperature decreases.

[0042] In other embodiments, a second return line 10 for returning the liquid working medium is connected below the first volute 41, and the second return line 10 is connected to the evaporator 1. When the heat pump system is just started, the gaseous working medium will enter the condenser 2 according to the aforementioned path, and then because the temperature of the volute and the third line 8 is relatively low, when the gaseous working medium contacts the volute and the third line 8, a small amount of the gaseous working medium will inevitably condense into liquid working medium. In order to avoid the residual liquid working medium from damaging the centrifuge, the above-mentioned liquid working medium is drained back to the evaporator 1 through the second return line 10, so as to avoid the waste of working medium and ensure the safe operation of the compressor assembly.

[0043] In other embodiments, since there will be liquid accumulation between the condenser outlet 22 and the pipe connected to it, in order to avoid the residue of this part of liquid working medium, a third reflux pipe 11 is connected between the condenser outlet 22 and the evaporator 1 to further improve the recovery rate of the liquid working medium.

[0044] In summary, the magnetic levitation centrifugal heat pump system of the present invention ensures that the flow rate and temperature of the gaseous working fluid entering the two sides of the compressor assembly are equal or similar by symmetrically arranged evaporator outlets, and adopts a first-stage compressor and a second-stage compressor to ensure that the compressors work with equal power, thereby improving the working fluid circulation efficiency and utilization rate.

[0045] The above description is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A magnetic levitation centrifugal heat pump system, characterized in that: include: An evaporator (1), wherein the lower end of the evaporator (1) is provided with an evaporator inlet (101) for inputting a liquid working medium, and the upper end of the evaporator (1) is symmetrically provided with an evaporator outlet (102) for outputting a gaseous working medium; A compressor assembly, the compressor assembly being arranged above the evaporator (1), the compressor assembly comprising a primary compressor (4) and a secondary compressor (5) arranged in a vertical direction and connected in series, the volutes on both sides of the primary compressor (4) being connected to the evaporator outlet (102); A condenser (2) located on one side of the compressor assembly, the condenser (2) being located at a height between the primary compressor (4) and the secondary compressor (5), the condenser (2) being provided with a condenser (2) inlet for a gaseous working medium to flow into, the condenser (2) inlet being connected to volutes on both sides of the secondary compressor (5); The gaseous working medium flows upward and is compressed by the first-stage compressor (4) and the second-stage compressor (5), and then flows downward into the condenser (2), thereby heating the heating water flowing into the condenser (2).

2. The magnetic levitation centrifugal heat pump system according to claim 1, characterized in that: The first volutes (41) on both sides of the primary compressor (4) are connected to the evaporator outlet (102) via a first pipeline (6) extending upward, the second volutes (51) on both sides of the secondary compressor (5) are connected to the condenser inlet (21) via a second pipeline (7) extending downward, and the first volute (41) and the second volute (51) on the same side are connected via a third pipeline (8) arranged upward.

3. The magnetic levitation centrifugal heat pump system according to claim 2, characterized in that: The third pipeline (8) is connected to a first return pipeline (9) for returning the gaseous working medium, the first return pipeline (9) extending vertically downward and connected to a return interface (106) of the evaporator (1), and a solenoid valve is provided on the first return pipeline (9).

4. The magnetic levitation centrifugal heat pump system according to claim 3, characterized in that: The evaporator outlets (102) are symmetrically arranged in the tube path of the evaporator (1), and the reflux interface (106) is located at the center of the two evaporator outlets (102).

5. The magnetic levitation centrifugal heat pump system according to claim 4, characterized in that: The distance between the centers of the two evaporator outlets (102) is 2000 mm, the distance between the center of the left evaporator outlet (102) and the left side of the evaporator (1) shell is 600 mm, and the distance between the center of the right evaporator outlet (102) and the left side of the evaporator (1) shell is 400 mm, the left side is a side close to the circulating water inlet and outlet of the evaporator (1), and the right side is a side away from the circulating water inlet and outlet of the evaporator (1).

6. The magnetic levitation centrifugal heat pump system according to claim 2, characterized in that: The first volute (41) is arranged vertically, and the second volute (51) is arranged horizontally.

7. The magnetic levitation centrifugal heat pump system according to claim 6, characterized in that: A second reflux pipeline (10) for reflux of liquid working medium is connected below the first volute (41), and the second reflux pipeline (10) is connected to the evaporator (1).

8. The magnetic levitation centrifugal heat pump system according to claim 1, characterized in that: The primary compressor (4) is connected to the evaporator (1) via a bracket, and the secondary compressor (5) is connected to the condenser (2) via a bracket.

9. The magnetic levitation centrifugal heat pump system according to any one of claims 1 to 8, characterized in that: The lower end of the condenser (2) is connected to a condenser outlet (22) for outputting condensed working fluid, a third reflux pipeline (11) is connected between the condenser outlet (22) and the evaporator (1), the condenser outlet (22) is connected to a working fluid inlet (31) of a plate heat exchanger (3) via a pipeline, and the working fluid outlet (32) of the plate heat exchanger (3) is connected to an evaporator inlet (101) via an outlet pipeline (33).

10. The magnetic levitation centrifugal heat pump system according to claim 9, characterized in that: The lower pipe (34) of the plate heat exchanger (3) extends into the condenser and introduces low-temperature heating water in the condenser. After the heating water in the plate heat exchanger (3) cools the working medium flowing through the plate heat exchanger (3), the heating water is discharged from the upper pipe (35).

11. The magnetic levitation centrifugal heat pump system according to claim 10, characterized in that: The condenser (2) is provided with a heating water inlet (23) and a heating water outlet (24), and part of the low-temperature heating water flowing into the heating water inlet (23) enters the plate heat exchanger (3) through the lower pipeline (34).

12. The magnetic levitation centrifugal heat pump system according to claim 1, characterized in that: The evaporator (1) is provided with a liquid distribution plate (103) located at the upper end of the evaporator inlet (101), a heat exchange tube group (104) for heating the liquid working medium is provided at the upper end of the liquid distribution plate (103), and an air distribution plate (105) located below the evaporator outlet (102) is provided above the heat exchange tube group (104).

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