Energy-saving refrigerating device based on water chilling unit

Abstract

The invention relates to the technical field of refrigeration of water chilling units, and discloses an energy-saving refrigeration device based on a water chilling unit, the energy-saving refrigeration device comprises a mounting base, a power motor is fixedly assembled on one side of the top of the mounting base, and a supporting vertical frame is fixedly assembled on the other side of the top of the mounting base. The centrifugal pressurizing wheel is divided into the pressurizing part and the guide part, and the inclined guide piece is arranged on the guide chassis. The key point is that the inclination direction of the radial pressurizing blades is opposite to the inclination direction of the inclined guide sheets, and when media are thrown out by the radial pressurizing blades at a high speed, strong homodromous rotational flow is generated. The inclined guide sheets which are inclined oppositely play excellent roles of stator racemization and flow field reconstruction, can smoothly receive a high-speed medium, efficiently convert redundant tangential kinetic energy into static pressure energy, greatly eliminate impact flow separation loss of interstage fluid, provide an optimal pre-rotation angle and a higher inlet initial speed for a next-stage impeller, and improve the flow separation efficiency of the impeller. And the overall efficiency of multi-stage pressurization is improved.

Description

Technical Field

[0001] This invention relates to the field of chiller refrigeration technology, specifically to an energy-saving refrigeration device based on a chiller unit. Background Technology

[0002] Centrifugal pressurization devices are widely used in energy-saving refrigeration systems such as chillers, primarily for the continuous pressurization and transport of fluid media. Existing multi-stage centrifugal pressurization equipment typically faces the following technical bottlenecks: In multi-stage pressurization processes, the medium discharged from the previous stage impeller has extremely high tangential velocity and radial kinetic energy. Existing equipment typically uses simple bends for interstage backflow, which causes strong vortices, flow separation, and impact losses when the fluid enters the next stage impeller. This not only fails to effectively convert kinetic energy into static pressure but also results in significant hydraulic / aerodynamic energy dissipation.

[0003] During continuous centrifugal pressurization, the medium generates a large amount of heat due to high-speed shear friction and compression effects. Traditional equipment often only uses water jacket cooling on the outside of the casing, which is inefficient and causes the internal fluid temperature to rise step by step, deviating from the ideal "isothermal pressurization" process and significantly increasing the power consumption of subsequent pressurization stages.

[0004] When the fluid, after being pressurized through multiple stages, is finally discharged into the medium outlet, the sudden change in the flow channel cross-section and direction can easily cause blockage and backflow resistance at the exhaust / discharge port, reducing the overall volumetric efficiency of the machine.

[0005] Therefore, there is an urgent need for an energy-saving refrigeration and pressurization device that can achieve efficient interstage flow field reconstruction, has in-situ interstage heat dissipation function, and smooth material discharge. Summary of the Invention

[0006] This invention provides an energy-saving refrigeration device based on a chiller unit, which solves the problems mentioned in the background art.

[0007] The present invention provides the following technical solution: an energy-saving refrigeration device based on a chiller unit, including a mounting base, a power motor fixedly mounted on one side of the top of the mounting base, a support frame fixedly mounted on the other side of the top of the mounting base, a cascaded pressure cylinder fixedly mounted on the top of the support frame, a centrifugal pressure wheel and a static heat dissipation seat provided in the inner cavity of the cascaded pressure cylinder, and the static heat dissipation seat being located between two sets of centrifugal pressure wheels.

[0008] As a preferred technical solution of the present invention: the cascaded pressurizing cylinder includes a cylindrical shell, the top of the cylindrical shell is respectively fixedly equipped with a medium outlet and a medium inlet, the top of the cylindrical shell is also provided with a coolant interface, and a rotary drive shaft is rotatably connected in the axial direction of the cylindrical shell.

[0009] As a preferred embodiment of the present invention: the centrifugal pressure wheel is fixedly assembled via a rotary drive shaft and rotates with the rotary drive shaft, the rotary drive shaft being fixedly assembled with the output shaft of the power motor.

[0010] As a preferred embodiment of the present invention: the centrifugal pressure wheel includes a pressure-applying part and a guide part; The pressurizing part includes an impeller base, an axial through hole is provided in the axial direction of the impeller base, an annular feed port is provided on the outer edge of the impeller base in the axial direction, an internal flow channel cavity is provided in the outer side wall direction of the impeller base, and the internal flow channel cavity communicates with the annular feed port. Radial pressurizing blades are arranged in annular arrangement in the through space between the internal flow channel cavity and the annular feed port. The guide unit includes a guide chassis, the side of the guide chassis near the radial pressurizing blade is covered with an integrally formed flow-concentrating coating layer, the side of the guide chassis away from the radial pressurizing blade is provided with oblique guide plates arranged in a ring along the axis, and the inner ring guide groove is opened on the inner side of the outer ring of the guide chassis.

[0011] As a preferred technical solution of the present invention: the pressurizing part further includes a sealing gasket, which is disposed between the rotary drive shaft and the axial through hole to seal the gap between the axial through hole and the rotary drive shaft; The radial pressure blades in the pressure section are tilted in the opposite direction to the inclined guide plates in the guide section.

[0012] As a preferred embodiment of the present invention: the static heat sink includes a limiting heat sink part and a limiting connection part; The limiting heat dissipation part includes a heat dissipation body, which includes a limiting partition and an outer edge cover for covering the outer edge of the centrifugal pressurizing wheel. The outer wall of the heat dissipation body is provided with an outer wall circulation hole. The limiting connection part includes a connecting assembly, which consists of a limiting partition and an outer edge cover.

[0013] As a preferred technical solution of the present invention: through holes are provided at the abutment of several limiting heat dissipation parts and limiting connection parts to form a liquid circulation channel; The inner cavity of the cylindrical shell is provided with a limiting groove, and the static heat sink is sleeved with the limiting groove in the inner cavity of the rotary drive shaft through the protruding part of the heat sink body.

[0014] As a preferred embodiment of the present invention: a terminal booster wheel is further provided at the end of a plurality of centrifugal pressurizing wheels, wherein the terminal booster wheel is an enlarged version of the pressurizing part in the centrifugal pressurizing wheel.

[0015] The present invention has the following beneficial effects: 1. This energy-saving refrigeration device based on a chiller unit divides the centrifugal pressurizing impeller into a "pressurizing section" and a "guiding section," and installs inclined guide vanes on the guide chassis. The key is that the inclination direction of the radial pressurizing blades is opposite to that of the inclined guide vanes. When the medium is thrown out at high speed by the radial pressurizing blades, it exhibits strong swirling flow in the same direction. The oppositely inclined guide vanes play an excellent role in "stator deswirl" and "flow field reconstruction," smoothly receiving high-speed media and efficiently converting excess tangential kinetic energy into static pressure energy. This greatly eliminates the impact and flow separation losses of interstage fluids, providing the next stage impeller with the optimal pre-swirl angle and a higher inlet initial velocity, thus improving the overall efficiency of multi-stage pressurization.

[0016] 2. This energy-saving refrigeration device based on a chiller unit has a "flow-concentrating coating layer" on the side of the guide chassis near the radial pressure blades, and an outer edge cover that fits against the outside of the inclined guide plate on the static heat sink. The flow-concentrating coating layer effectively seals the lateral open space of the radial pressure blades; the outer edge cover forms a rigid physical boundary on the outside, forcibly limiting the medium discharged from the inclined guide plate in three dimensions, blocking the radial escape and internal turbulent backflow of the high-pressure medium during the interstage transmission process, ensuring that the medium enters the next stage along the designed inner ring guide groove, and maximizing the volumetric efficiency of the device.

[0017] 3. This energy-saving refrigeration device based on a chiller unit embeds a static heat sink between two adjacent centrifugal pressurizing impellers and connects to the coolant interface through circulation holes on the outer wall to form a liquid circulation channel. The cooling medium is directly introduced into the core heat-generating area between stages. The static heat sink not only absorbs heat in situ from the high-temperature pressurization environment, but also directly radiates and cools the rotating centrifugal pressurizing impellers, promptly removing the heat generated by each stage of pressurization. This greatly reduces the specific volume of the medium, thereby proportionally reducing the mechanical drive work required by the subsequent impellers and achieving deep energy saving at the system level.

[0018] 4. This energy-saving refrigeration device based on a chiller unit adds an enlarged end pressure booster at the end of several centrifugal pressure boosters. After the medium leaves the last stage of centrifugal pressure boosters, the enlarged end pressure booster uses its larger wheel diameter and centrifugal torque to perform a final tangential and radial momentum compensation on the fluid, forcibly sorting the flow field at the discharge port, making the discharge vector direction of the medium highly consistent with the outlet direction of the medium, overcoming the back pressure resistance of the high-pressure fluid at the outlet of the casing, and ensuring the operational stability of the device under high flow conditions.

[0019] 5. The pressurization section of the energy-saving refrigeration device based on the chiller unit is equipped with a sealing gasket to seal the gap between the rotary drive shaft and the axial through hole. This structure effectively prevents high-pressure, potentially corrosive or temperature-different media from flowing axially to the power motor side, protecting the motor bearings and stator and rotor systems, and significantly extending the service life and maintenance-free period of the whole machine. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cascaded pressure cylinder structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the cascaded pressure cylinder of the present invention; Figure 4 This is a schematic diagram of the centrifugal pressure wheel structure of the present invention; Figure 5 This is a schematic diagram of the centrifugal pressure wheel and static heat sink structure of the present invention; Figure 6 This is a schematic diagram of the end-capacitor structure of the present invention; Figure 7 This is a schematic diagram showing the flow direction of the medium in the centrifugal pressurizing wheel of the present invention.

[0021] In the diagram: 1. Mounting base; 2. Power motor; 3. Support frame; 4. Cascaded pressure cylinder; 5. Centrifugal pressure wheel; 6. Static heat dissipation base; 7. End pressure booster wheel; 401. Cylindrical outer casing; 402. Medium outlet; 403. Medium inlet; 404. Rotary drive shaft; 405. Coolant inlet; 501. Impeller base; 502. Axial through hole; 503. Annular feed inlet; 504. Internal flow channel cavity; 505. Radial pressure blade; 506. Sealing gasket; 507. Guide base; 508. Condensation coating layer; 509. Inner ring guide groove; 510. Angled guide plate; 601. Heat dissipation body; 602. Limiting partition; 603. Connecting assembly; 604. Outer wall circulation hole; 605. Outer edge cover. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 - Figure 7 An energy-saving refrigeration device based on a chiller unit includes a mounting base 1. A power motor 2 is fixedly mounted on one side of the top of the mounting base 1, and a support frame 3 is fixedly mounted on the other side of the top of the mounting base 1. A cascaded pressure cylinder 4 is fixedly mounted on the top of the support frame 3. The inner cavity of the cascaded pressure cylinder 4 is provided with centrifugal pressure rollers 5 and a static heat dissipation seat 6. The static heat dissipation seat 6 is located between two sets of centrifugal pressure rollers 5.

[0024] In a preferred embodiment: the cascaded pressurizing cylinder 4 includes a cylindrical shell 401, the top of the cylindrical shell 401 is fixedly fitted with a medium outlet 402 and a medium inlet 403, the top of the cylindrical shell 401 is also provided with a coolant interface 405, and a rotary drive shaft 404 is rotatably connected in the axial direction of the cylindrical shell 401.

[0025] In a preferred embodiment: the centrifugal pressure wheel 5 is fixedly assembled via a rotary drive shaft 404 and rotates with the rotary drive shaft 404, which is fixedly assembled with the output shaft of the power motor 2.

[0026] In the above structure, the power motor 2 drives several centrifugal pressure rollers 5 to rotate in the inner cavity of the cascaded pressure cylinder 4 via the rotary drive shaft 404. The medium inlet 403 and the medium outlet 402 serve as the inlet and outlet for the medium to enter the inner cavity of the cascaded pressure cylinder 4. The medium is pressurized by the rotating centrifugal pressurizing wheel 5, and the pressurized medium and the centrifugal pressurizing wheel 5 are cooled by the static heat sink 6. The pressurized medium is guided by the centrifugal pressurizing wheel 5 to the inlet of the next stage centrifugal pressurizing wheel 5 for secondary pressurization, thereby realizing multi-stage pressurization. The multi-stage pressurized medium is discharged from the inner cavity of the cascade pressurizing cylinder 4 through the medium outlet 402.

[0027] In a preferred embodiment: the centrifugal pressure wheel 5 includes a pressure-applying part and a guide part; The pressurizing part includes an impeller base 501, an axial through hole 502 is provided in the axial direction of the impeller base 501, an annular feed inlet 503 is provided on the outer edge of the impeller base 501 in the axial direction, an internal flow channel cavity 504 is provided in the outer side wall direction of the impeller base 501, and the internal flow channel cavity 504 communicates with the annular feed inlet 503. Radial pressurizing blades 505 are arranged in annular arrangement in the through space of the internal flow channel cavity 504 and the annular feed inlet 503. The guide section includes a guide chassis 507. The guide chassis 507 is covered with an integrally formed flow-concentrating coating layer 508 on the side near the radial pressure blade 505. An inclined guide plate 510 is arranged in a ring along the axis on the side of the guide chassis 507 away from the radial pressure blade 505. An inner ring guide groove 509 is opened on the inner side of the outer ring of the guide chassis 507.

[0028] In a preferred embodiment: the pressurizing part further includes a sealing gasket 506, which is disposed between the rotary drive shaft 404 and the axial through hole 502 to seal the gap between the axial through hole 502 and the rotary drive shaft 404. The radial pressure blade 505 in the pressure section is inclined in the opposite direction to the inclined guide plate 510 in the guide section.

[0029] In the above structure, after entering the inner cavity of the cylindrical outer shell 401 through the medium inlet 403, it enters the inner cavity of the centrifugal pressure wheel 5 through the inlet of the first centrifugal pressure wheel 5; After the medium enters the space between the annular feed inlet 503 and the internal flow channel cavity 504 through the annular feed inlet 503, when the power motor 2 drives the centrifugal pressure wheel 5 to rotate through the rotary drive shaft 404, the medium is pushed by the radial pressure blade 505 to move towards the outer edge of the impeller base 501. During this process, the movement of the medium is accelerated. The radial pressure blade 505 is covered by the flow-concentrating coating layer 508, so that the accelerated medium moves through the flow-concentrating coating layer 508 and the inner annular guide groove 509 to the side of the guide base 507 near the inclined guide plate 510. The inclined guide plate 510 further pushes the medium, and in the state of further acceleration, the medium is moved to the annular feed inlet 503 of the second set of centrifugal pressure wheels 5, thereby increasing the flow rate of the medium entering the second set of annular feed inlets 503.

[0030] In a preferred embodiment: the static heat sink 6 includes a limiting heat sink part and a limiting connecting part; The limiting heat dissipation part includes a heat dissipation body 601, which includes a limiting partition 602 and an outer edge cover 605 for covering the outer edge of the centrifugal pressure wheel 5. The outer wall of the heat dissipation body 601 is provided with an outer wall circulation hole 604. The limiting connection part includes a connecting assembly 603, which is composed of a limiting partition 602 and an outer edge cover 605.

[0031] In a preferred embodiment: through holes are provided at the abutment of several limiting heat dissipation parts and limiting connecting parts to form a liquid circulation channel; A limiting groove is provided in the inner cavity of the cylindrical outer shell 401, and the static heat sink 6 is sleeved with the limiting groove in the inner cavity of the rotary drive shaft 404 through the protruding part of the heat sink body 601.

[0032] In the above structure, through holes are provided at the abutment of several limiting heat dissipation parts and limiting connection parts to form a liquid circulation channel, and several limiting heat dissipation parts and limiting connection parts are fixedly connected by bolts or other structures. A limiting groove is provided in the inner cavity of the cylindrical shell 401, and the static heat sink 6 is sleeved with the limiting groove in the inner cavity of the rotary drive shaft 404 through the protruding part of the heat sink body 601. The coolant interface 405 provided in the cylindrical shell 401 is connected to the circulation hole 604 on the outer wall through the limiting groove, so that the cooling medium enters the inner cavity of the static heat sink 6 through the coolant interface 405 to achieve the heat dissipation effect on the inner cavity of the cylindrical shell 401 and the centrifugal pressure wheel 5. The outer edge cover 605 is attached to the outer side of the inclined guide plate 510. The outer edge cover 605 isolates the space outside the inclined guide plate 510, so that when the medium is pushed by the inclined guide plate 510, the medium can be limited by the outer edge cover 605.

[0033] In a preferred embodiment, a terminal pressure wheel 7 is also provided at the end of a plurality of centrifugal pressure wheels 5, and the terminal pressure wheel 7 is an enlarged version of the pressure part in the centrifugal pressure wheel 5.

[0034] In the above structure, by adding a separate set of end pressure rollers 7, after the medium is discharged through the last set of centrifugal pressure rollers 5, it can be pressurized in the direction of the outer edge of the end pressure rollers 7, so that the discharge direction of the medium is relatively consistent with the discharge direction of the medium outlet 402, thereby reducing the resistance of the medium when it is discharged from the inner cavity of the cylindrical shell 401.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended technical solutions and their equivalents.

Claims

1. An energy-saving refrigeration device based on a chiller unit, comprising a mounting base (1), characterized in that: A power motor (2) is fixedly mounted on one side of the top of the mounting base (1), and a support frame (3) is fixedly mounted on the other side of the top of the mounting base (1). A cascaded pressure cylinder (4) is fixedly mounted on the top of the support frame (3). The inner cavity of the cascaded pressure cylinder (4) is provided with a centrifugal pressure wheel (5) and a static heat sink (6). The static heat sink (6) is located between the two sets of centrifugal pressure wheels (5) at intervals.

2. The energy-saving refrigeration device based on a chiller unit according to claim 1, characterized in that: The cascaded pressurizing cylinder (4) includes a cylindrical shell (401), on the top of which a medium outlet (402) and a medium inlet (403) are fixedly mounted respectively. A coolant interface (405) is also provided on the top of the cylindrical shell (401). A rotary drive shaft (404) is rotatably connected in the axial direction of the cylindrical shell (401).

3. The energy-saving refrigeration device based on a chiller unit according to claim 2, characterized in that: The centrifugal pressure wheel (5) is fixedly assembled via a rotary drive shaft (404) and rotates with the rotary drive shaft (404). The rotary drive shaft (404) is fixedly assembled with the output shaft of the power motor (2).

4. The energy-saving refrigeration device based on a chiller unit according to claim 1, characterized in that: The centrifugal pressurizing wheel (5) includes a pressurizing part and a guiding part; The pressurizing part includes an impeller base (501), an axial through hole (502) is provided in the axial direction of the impeller base (501), an annular feed inlet (503) is provided on the outer edge of the impeller base (501) in the axial direction, an internal flow channel cavity (504) is provided in the outer side wall direction of the impeller base (501), and the internal flow channel cavity (504) communicates with the annular feed inlet (503). Radial pressurizing blades (505) are arranged in annular arrangement in the through space between the internal flow channel cavity (504) and the annular feed inlet (503). The guide section includes a guide chassis (507), the guide chassis (507) is covered with an integrally formed flow-concentrating coating layer (508) on the side near the radial pressure blade (505), and oblique guide plates (510) are arranged in a ring along the axis on the side of the guide chassis (507) away from the radial pressure blade (505). An inner ring guide groove (509) is opened on the inner side of the outer ring of the guide chassis (507).

5. An energy-saving refrigeration device based on a chiller unit according to claim 4, characterized in that: The pressurizing part also includes a sealing gasket (506), which is disposed between the rotary drive shaft (404) and the axial through hole (502) to seal the gap between the axial through hole (502) and the rotary drive shaft (404); The radial pressure blade (505) in the pressure section is inclined in the opposite direction to the inclined guide plate (510) in the guide section.

6. The energy-saving refrigeration device based on a chiller unit according to claim 1, characterized in that: The static heat sink (6) includes a limiting heat sink part and a limiting connection part; The limiting heat dissipation part includes a heat dissipation body (601), the heat dissipation body (601) includes a limiting partition (602) and an outer edge cover (605) for covering the outer edge of the centrifugal pressurizing wheel (5), and the outer wall of the heat dissipation body (601) is provided with an outer wall circulation hole (604). The limiting connection part includes a connecting assembly (603), and the connecting assembly (603) consists of a limiting partition (602) and an outer edge cover (605).

7. An energy-saving refrigeration device based on a chiller unit according to claim 6, characterized in that: Several limiting heat dissipation parts and limiting connecting parts are provided with through holes at their contact points to form a liquid circulation channel; A limiting groove is provided in the inner cavity of the cylindrical outer shell (401), and the static heat sink (6) is sleeved with the limiting groove in the inner cavity of the rotary drive shaft (404) through the protruding part of the heat sink body (601).

8. An energy-saving refrigeration device based on a chiller unit according to claim 1, characterized in that: Several centrifugal pressurizing wheels (5) are also provided with end pressure boosting wheels (7) at their ends. The end pressure boosting wheels (7) are enlarged versions of the pressurizing parts in the centrifugal pressurizing wheels (5).

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