Magnetic levitation centrifugal heat pump system

Abstract

The present invention discloses a magnetic levitation centrifugal heat pump system, wherein the lower end of the evaporator is provided with an evaporator inlet for inputting liquid working fluid, and the upper end of the evaporator is symmetrically provided with an evaporator outlet for outputting gaseous working fluid; a compressor assembly is arranged above the evaporator, and the compressor assembly includes a first-stage compressor and a second-stage compressor arranged in a vertical direction and in series, and the volutes on both sides of the first-stage compressor are connected to the evaporator outlet; the height of the condenser is located between the first-stage compressor and the second-stage compressor, and the condenser is provided with a condenser inlet for the inflow of gaseous working fluid, and the condenser inlet is connected to the volutes on both sides of the second-stage compressor; the gaseous working fluid flows upward and is compressed by the first-stage compressor and the second-stage compressor, and then flows downward into the condenser, thereby heating the heating water flowing into the condenser. The magnetic levitation centrifugal heat pump system of the present invention adopts two-stage compressors with equal power to perform work, thereby ensuring the utilization rate and circulation efficiency of the working fluid, and does not require an additional air supply pipeline.

Description

Technical Field

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

[0002] Heat pumps, known for their cleanliness, environmental friendliness, energy efficiency, and high efficiency, have seen increasing adoption in large-scale central heating systems in recent years. However, existing heat pumps suffer from low refrigerant circulation efficiency, resulting in low energy efficiency. Therefore, improving refrigerant circulation efficiency is crucial for improving heat pump performance.

[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 existing technology, 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 medium, 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 levitation centrifugal heat pump system, comprising:

[0006] An evaporator, wherein the lower end of the evaporator is provided with an evaporator inlet for inputting liquid working medium, and the upper end of the evaporator is symmetrically provided with an evaporator outlet for outputting gaseous working medium;

[0007] A compressor assembly is disposed above the evaporator, comprising a primary compressor and a secondary compressor arranged in series in a vertical direction, wherein volutes on both sides of the primary compressor are connected to the evaporator outlet;

[0008] A condenser located on one side of the compressor assembly, the condenser being located between the primary compressor and the secondary compressor, the condenser being provided with a condenser inlet for inflow of the gaseous working medium, the condenser inlet being connected to the volutes on both sides of the secondary compressor;

[0009] The gaseous working medium flows upward and is compressed by the first-stage compressor and the second-stage compressor, and then flows downward into the condenser, and heats the heating water flowing into the condenser.

[0010] 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, adopts a first-stage compressor and a second-stage compressor to ensure that the compressors can perform work with equal power, thereby improving the working medium circulation efficiency and utilization rate.

[0011] Furthermore, in order to ensure that the gaseous working medium 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.

[0012] Furthermore, in order to avoid surge after shutdown, the third pipeline is connected to a first return pipeline for returning the gaseous working medium. The first return pipeline extends vertically downward and is connected to the return interface of the evaporator. A solenoid valve is provided on the first return pipeline.

[0013] 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.

[0014] 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.

[0015] Furthermore, 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.

[0016] Furthermore, in order to prevent the liquid working medium from remaining in the compressor, a second return line for returning the liquid working medium is connected below the first volute, and the second return line is connected to the evaporator.

[0017] 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.

[0018] 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, and 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.

[0019] Furthermore, in order to further heat the heating water, the lower pipe of the plate heat exchanger extends into the condenser and introduces low-temperature heating water in the condenser. After the heating water of the plate heat exchanger cools the working medium flowing through the plate heat exchanger, the heating water is discharged from the upper pipe.

[0020] 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.

[0021] 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, a liquid distribution plate is provided in the evaporator at the upper end of the evaporator inlet, and a heat exchange tube group for heating the liquid working medium is provided at the upper end of the liquid distribution plate, and an air distribution plate located below the evaporator outlet is provided above the heat exchange tube group.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The magnetic levitation centrifugal heat pump system of the present invention optimizes the position of the evaporator outlet in the shell side to ensure that the temperature of the gaseous working medium entering the first-stage compressor from the evaporator outlets on both sides is similar. The two-stage compressors connected in series ensure equal power of the two-stage compressors and optimize the utilization rate of the gaseous working medium entering the condenser.

[0024] 2. In the magnetic levitation centrifugal heat pump system of the present invention, the refrigerant flowing out of the condenser undergoes 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 together with the heating water inside it, realizes heating, improves the utilization rate of the refrigerant, and optimizes the heating effect of the heating water.

[0025] 3. The magnetic levitation centrifugal heat pump system of the present invention uses the first return line to return the high-pressure gaseous working medium remaining inside to the evaporator when the system is shut down, thereby preventing the working medium from remaining in the compressor assembly; when the system is just started, it prevents the liquid working medium generated after the gaseous working medium contacts the pipeline from remaining 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

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the magnetic levitation centrifugal heat pump system of the present invention;

[0028] Figure 2 for Figure 1 A front view (omitting some components not related to the present invention);

[0029] Figure 3 for Figure 1 (Parts not related to the present invention are omitted) rear view;

[0030] Figure 4 Schematic diagram of the structure of the evaporator;

[0031] Figure 5 is a cross-sectional view of the evaporator;

[0032] Figure 6 It is a cross-sectional view of the bell flange and the volute;

[0033] 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. First-stage compressor, 41. First volute, 5. Second-stage compressor, 51. Second volute, 6. First pipeline, 7. Second pipeline, 8. Third pipeline, 9. First return pipeline, 10. Second return pipeline, 11. Third return pipeline, 12. Flange, 121. Closing structure, 122. Spiral groove. DETAILED DESCRIPTION

[0034] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0035] 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the 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, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] like Figures 1 to 3 As shown, a magnetic levitation centrifugal heat pump system includes: an evaporator 1, a compressor assembly, a condenser 2 and a plate heat exchanger 3.

[0038] like Figure 4 As shown, the lower end of the evaporator 1 is provided with an evaporator inlet 101 for inputting liquid working fluid, and the upper end of the evaporator 1 is symmetrically provided with an evaporator outlet 102 for outputting gaseous working fluid. A liquid distribution plate 103 is provided in the evaporator 1 above the evaporator inlet 101. The liquid distribution plate 103 can ensure the uniform flow of the incoming liquid working fluid. The upper end of the liquid distribution plate 103 is provided with a heat exchange tube group 104 for heating the liquid working fluid. Above the heat exchange tube group 104 is an air distribution plate 105 located below the evaporator outlet 102. The air distribution plate 105 can ensure the uniform flow of the gaseous working fluid. The heat source for heating the working fluid 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.

[0039] Specifically, liquid working fluid enters evaporator 1 through evaporator inlet 101 and exchanges heat with heat exchange tube group 104. After becoming gaseous, the liquid working fluid flows out through evaporator outlets 102 on both sides. Evaporator outlets 102 are symmetrically arranged within the tube path of evaporator 1, with the reflux port 106 located in the center of the two evaporator outlets 102.

[0040] like Figure 4 and Figure 5 As shown, preferably, 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 shell is 600 mm, and the distance between the center of the right evaporator outlet 102 and the left side of the evaporator shell is 400 mm. 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 circulating water inlet is arranged side by side at the left end of the evaporator 1 and is led upward. Under this distance setting, the gaseous working medium entering the evaporator outlets 102 on both sides has a similar temperature and flow rate, ensuring that the gaseous working medium can be evenly diverted into the compressor assembly to avoid boiling of the gaseous working medium in local positions.

[0041] The compressor assembly is arranged above the evaporator 1 and includes a primary compressor 4 and a secondary compressor 5 arranged vertically and connected in series. 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.

[0042] Preferably, the first volutes 41 on both sides of the first-stage compressor 4 are connected to the evaporator outlet 102 through the first pipeline 6 extending downward, and the second volutes 51 on both sides of the second-stage compressor 5 are connected to the condenser inlet 21 through the second pipeline 7 extending downward. 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 proportions. The first pipeline 6 has the largest diameter, which can ensure that more gaseous working medium enters the first volute 41. The gaseous working medium compressed by the first-stage compressor enters the third pipeline 8. The relatively reduced diameter of the third pipeline 8 can ensure the flow rate of the gaseous working medium, and the same applies to the subsequent ones.

[0043] The diameter of the inlet of the first volute 41 is larger than the diameter of the outlet of the first volute 41, the diameter of the outlet of the first volute 41 is equal to the diameter of the inlet of the second volute 51, and the diameter of the inlet of the second volute 51 is larger than the diameter of the outlet of the second volute 51. This ensures that the first pipeline 6, the second pipeline 7, and the third pipeline 8 are each pipelines of equal diameter. Specifically, the third pipeline 8 is an S-shaped pipeline, which can reduce the resistance encountered by 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. Especially for the third pipeline 8, after the heating system is shut down, some gaseous working medium will remain inside the third pipeline 8. As the gaseous working medium cools down and forms liquid working medium, this part of the liquid working medium will flow back into the first volute 41, then enter the second return pipeline 10 and return to the evaporator 1, further preventing the liquid working medium from remaining in the compressor assembly.

[0044] Specifically, a first-stage compressor is used for illustration, such as Figure 6 As shown, the first volute 41 and the first pipeline 6 are connected by a flange 12. The flange 12 has a closing structure 121 inside. The closing structure 121 faces the first volute 41, and the gaseous working medium can be accelerated by the closing structure 121. At the same time, the end of the flange 12 facing the centrifuge impeller has a spiral groove 122. The spiral groove 122 can prevent the gaseous working medium from contacting the volute and condensing into liquid working medium and entering the centrifuge.

[0045] 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, and then enters the third pipeline 8 in the vertical direction. After flowing through the third pipeline 8, it enters the side of the second volute 51, and finally flows downward from the second pipeline 7 arranged in front and behind to the condenser 2. The gaseous working medium first flows upward to pass through the first compressor 4 and the second compressor 5 for compression, and then flows downward to enter the condenser 2. Since the condenser 2 is located lower than the second compressor 5, the gaseous working medium will not remain in the volute of the second compressor 5.

[0046] Preferably, both the first-stage compressor 4 and the second-stage compressor 5 adopt a centrifuge and volute combination structure. The two centrifuges have the same structure and are both magnetic levitation centrifuges. The built-in impellers of the single centrifuges are of the same size. Furthermore, the temperature and flow rate of the gaseous working medium flowing through both sides of the compressor are similar.

[0047] The condenser 2 is located on the side of the compressor assembly. The height of the condenser 2 is between the first-stage compressor 4 and the second-stage 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 second-stage compressor 5.

[0048] The gaseous working medium flows upward and is compressed by the primary compressor 4 and the secondary compressor 5 before flowing downward into the condenser 2, heating 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 the heating water. After the gaseous working medium cools down to a liquid state, it enters the plate heat exchanger 3. The heated heating water then flows out of the heating water outlet 24 to provide heating.

[0049] The lower end of the condenser 2 is connected to a condenser outlet 22 for outputting the condensed working medium. This condenser outlet 22 is connected to the working medium inlet 31 of the plate heat exchanger 3 via a pipeline. The working medium outlet 32 of the plate heat exchanger 3 is in communication with the evaporator inlet 101 via 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, some of the low-temperature heating water inside the condenser 2 enters the plate heat exchanger 3 through the lower pipeline 34. The low-temperature heating water entering the plate heat exchanger 3 exchanges heat with the liquid working medium flowing through the plate heat exchanger 3, further cooling the liquid working medium. This low-temperature heating water is then heated and heated up. The heated heating water is then used for heating along the upper pipeline 35.

[0050] 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.

[0051] 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 reusing the heating water for heating.

[0052] In other embodiments, the third pipeline 8 is connected to a first return pipeline 9 for returning 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 from the first return pipeline 9 to the evaporator 1. Since the heat pump system is shut down, a check valve is provided inside the third pipeline 8, and 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 prevent the gaseous working medium from becoming liquid working medium and remaining in the volute as the temperature drops.

[0053] In other embodiments, a second return line 10 for returning the liquid working medium is connected to the lower portion of 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 along the aforementioned path. Then, due to the relatively low temperature of the volute and the third line 8, a small amount of the gaseous working medium will inevitably condense into liquid working medium when the gaseous working medium contacts the volute and the third line 8. In order to avoid damage to the centrifuge due to residual liquid working medium, the liquid working medium is guided back to the evaporator 1 through the second return line 10, thereby avoiding waste of working medium while ensuring the safe operation of the compressor assembly.

[0054] 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 the 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.

[0055] 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 both sides of the compressor assembly are equal or similar by the symmetrically arranged evaporator outlets, and adopts a first-stage compressor and a second-stage compressor to ensure that the compressors can perform work with equal power, thereby improving the working fluid circulation efficiency and utilization rate.

[0056] The above description is intended to serve as a guide for the preferred embodiments of the present invention. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification and 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 first-stage compressor (4) and a second-stage compressor (5) arranged in a vertical direction and connected in series, the first volutes (41) on both sides of the first-stage compressor (4) being connected to the evaporator outlet (102), and the first-stage compressor (4) and the second-stage compressor (5) both being magnetically suspended centrifuges; A condenser (2) located on one side of the compressor assembly, the condenser (2) being located between the first-stage compressor (4) and the second-stage compressor (5), the condenser (2) being provided with a condenser (2) inlet for inflow of a gaseous working medium, the condenser (2) inlet being connected to volutes on both sides of the second-stage compressor (5); The gaseous working medium flows upward and is compressed by the first-stage compressor (4) and the second-stage compressor (5) before flowing downward into the condenser (2), thereby heating the heating water flowing into the condenser (2); The first volutes (41) on both sides of the first-stage compressor (4) are connected to the evaporator outlet (102) via a first pipeline (6) extending downward, the second volutes (51) on both sides of the second-stage 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; The outlet of the first volute (41) is arranged vertically, the outlet of the second volute (51) is arranged horizontally, the third pipeline (8) is an S-shaped pipeline, and a second return pipeline (10) for returning the liquid working medium is connected below the first volute (41), and the second return pipeline (10) is connected to the evaporator (1).

2. The magnetic levitation centrifugal heat pump system according to claim 1, 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) extends vertically downward and is connected to the return interface (106) of the evaporator (1). A solenoid valve is provided on the first return pipeline (9).

3. The magnetic levitation centrifugal heat pump system according to claim 2, 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).

4. The magnetic levitation centrifugal heat pump system according to claim 3, 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 close to the circulating water inlet and outlet of the evaporator (1), and the right side is far from the circulating water inlet and outlet of the evaporator (1).

5. The magnetic levitation centrifugal heat pump system according to claim 1, characterized in that: The first volute (41) is arranged vertically, and the second volute (51) is arranged horizontally.

6. 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.

7. The magnetic levitation centrifugal heat pump system according to any one of claims 1 to 6, characterized in that: The lower end of the condenser (2) is connected to a condenser outlet (22) for outputting the condensed working medium. A third reflux pipeline (11) is connected between the condenser outlet (22) and the evaporator (1). 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 communicated with the evaporator inlet (101) through an outlet pipeline (33).

8. The magnetic levitation centrifugal heat pump system according to claim 7, 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).

9. The magnetic levitation centrifugal heat pump system according to claim 8, 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 pipe (34).

10. 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), the upper end of the liquid distribution plate (103) is provided with a heat exchange tube group (104) for heating the liquid working medium, and the upper end of the heat exchange tube group (104) is provided with an air distribution plate (105) located below the evaporator outlet (102).

Images