Low-noise horizontal rotor high-speed refrigerated centrifuge

Abstract

The utility model discloses a low-noise horizontal rotor high-speed freezing centrifugal machine which comprises a centrifugal machine shell, a centrifugal inner cavity is formed in the inner side of the centrifugal machine shell, a coiled copper pipe connected with a freezing assembly is arranged on the inner side of the centrifugal inner cavity, and the inner side of the centrifugal machine shell is connected with a vacuum cutoff valve through a vacuum pipe. And the vacuum cutoff valve is communicated with a vacuum system through a guide pipe. The sealed centrifugal machine shell is adopted, the vacuum system vacuumizes the centrifugal inner cavity through the vacuum pipe, vibration of the whole machine can be effectively reduced, noise transmission can be weakened through the vacuum environment, and noise generated in the centrifugal process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, specifically a low-noise horizontal rotor high-speed refrigerated centrifuge. Background Technology

[0002] Centrifuges are core equipment in modern chemical, biomedical, and environmental engineering fields. They use the inertial force generated by high-speed rotation to separate substances of different densities into layers. Existing horizontal rotor high-speed centrifuges typically produce loud noise and vibration during high-speed centrifugation. To address this, we propose a low-noise horizontal rotor high-speed refrigerated centrifuge. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a low-noise horizontal rotor high-speed refrigerated centrifuge. The vacuum system evacuates the internal cavity of the centrifuge through vacuum tubes, which can effectively reduce the vibration of the whole machine. At the same time, the vacuum environment can weaken the transmission of noise and reduce the noise generated during the centrifugation process, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-noise horizontal rotor high-speed refrigerated centrifuge, including a centrifuge housing, an internal centrifuge cavity provided inside the centrifuge housing, a copper coil connected to the refrigeration component provided inside the internal centrifuge cavity, and a vacuum shut-off valve connected to the inside of the centrifuge housing via a vacuum tube, the vacuum shut-off valve being connected to the vacuum system via a conduit.

[0005] As a preferred technical solution of this utility model, a high-speed brushless motor is installed inside the centrifuge housing. A horizontal rotor body is installed on the output shaft of the high-speed brushless motor by a locking nut. Several hanging ears are evenly fixed around the periphery of the horizontal rotor body by screws, and a hanging basket is rotatably arranged between adjacent hanging ears.

[0006] As a preferred embodiment of this invention, a vibration sensor is provided on the lower side of the centrifuge casing.

[0007] As a preferred embodiment of this utility model, the refrigeration assembly includes a refrigeration compressor. The discharge port of the refrigeration compressor is connected to the inlet end of the copper tube of the refrigerant feed pipe. An inlet valve is installed on the refrigerant feed pipe. The return port of the refrigeration compressor is connected to the outlet end of the copper tube of the refrigerant return pipe. A return valve is installed on the refrigerant return pipe.

[0008] As a preferred embodiment of this invention, a radiator is installed on the heat dissipation surface of the refrigeration compressor.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by using a sealed centrifuge shell, the vacuum system evacuates the internal cavity of the centrifuge through a vacuum tube, which can effectively reduce the vibration of the whole machine. At the same time, the vacuum environment can reduce noise propagation and reduce the noise generated during the centrifugation process. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a partial explosion diagram of the present invention;

[0012] Figure 3 This is a schematic diagram of the structure of the high-speed brushless motor and horizontal rotor body of this utility model.

[0013] In the diagram: 1 Centrifuge housing, 2 High-speed brushless motor, 3 Locking nut, 4 Horizontal rotor body, 5 Hanging lug, 6 Hanging basket, 7 Centrifuge internal cavity, 8 Vibration sensor, 9 Refrigerant inlet pipe, 10 Refrigerant return pipe, 11 Inlet on / off valve, 12 Return off valve, 13 Refrigeration compressor, 14 Radiator, 15 Vacuum system, 16 Vacuum shut-off valve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3 This utility model provides a technical solution: a low-noise horizontal rotor high-speed refrigerated centrifuge, including a centrifuge housing 1. A vacuum shut-off valve 16 is connected to the inside of the centrifuge housing 1 via a vacuum tube. The vacuum shut-off valve 16 is connected to a vacuum system 15 via a conduit. The vacuum system 15 uses a vacuum pump commonly used in the prior art. The vacuum system 15 evacuates the internal cavity 7 of the centrifuge through the vacuum tube, which can effectively reduce the vibration of the entire machine. Simultaneously, the vacuum environment can weaken noise propagation and reduce the noise generated during centrifugation.

[0016] Specifically, the vacuum system 5 evacuates the inside of the centrifuge housing 1, enabling the internal cavity of the centrifuge to quickly reach -70Kpa to -85Kpa in 15 seconds (the vacuum pressure value is adjusted by a high-precision regulating valve, and the vacuum value is monitored by a PLC system); the vacuum shut-off valve 16 controls the vacuum breaking, effectively reducing the vibration of the whole machine.

[0017] The centrifuge housing 1 includes a sealed housing and a sealed cover. A sealing gasket is provided at the connection between the sealed housing and the sealed cover to improve the sealing performance of the centrifuge housing 1, reduce heat exchange, improve refrigeration efficiency, and prevent air from entering and causing increased noise during centrifugation.

[0018] In a preferred embodiment, an ultra-quiet high-speed brushless motor 2 is installed inside the centrifuge housing 1. A horizontal rotor body 4 is mounted on the output shaft of the high-speed brushless motor 2 via a locking nut 3. The horizontal rotor body 4 adopts a flying saucer-like design, which can better reduce wind resistance and noise during high-speed rotation. Several hanging ears 5 are evenly fixed around the periphery of the horizontal rotor body 4 with screws, and a hanging basket 6 is rotatably arranged between adjacent hanging ears 5. The hanging basket 6 adopts a cylindrical hanging ear 5 design, and in its free state, the hanging basket 6 is perpendicular to the horizontal rotor body 4 at 90°. After high-speed rotation, the hanging basket 6 is horizontal to the horizontal rotor body 4 at 180°. The vertical basket can be automatically loaded and unloaded with the help of a robotic arm. The hanging ears 5, made of high-performance engineering plastic, are connected to the horizontal rotor body 4 to better achieve weight reduction. Both the horizontal rotor body 4 and the hanging basket 6 are made of aerospace-grade ultra-strong alloy materials, which have high tensile strength, high weight, and are lightweight.

[0019] In a preferred embodiment, a high-precision vibration sensor 8 (with an accuracy of micrometer level <FS ±4%) is installed on the lower side of the centrifuge housing 1. The vibration sensor 8 monitors the vibration state of the whole machine after high-speed rotation. If the vibration exceeds the set value, an alarm will be triggered and the machine will stop. This is safe and reliable, and the noise can be controlled (≤65dB±1dB).

[0020] In a preferred embodiment, the centrifuge housing 1 has an internal centrifuge cavity 7 inside. A coiled copper tube connected to a refrigeration assembly is installed inside the internal centrifuge cavity 7. The refrigeration assembly includes a refrigeration compressor 13. The discharge port of the refrigeration compressor 13 is connected to the inlet end of the coiled copper tube via a refrigerant inlet pipe 9. An inlet on / off valve 11 is installed on the refrigerant inlet pipe 9. Environmentally friendly refrigerant is added to the refrigeration compressor 13. The refrigerant energy from the compressor's operation is conducted through the refrigerant inlet pipe 9 (copper tube) and the inlet on / off valve 11, transferring the refrigerant to the outer wall of the centrifuge's internal cavity for cooling. The cold air energy is conducted to the internal cavity of the centrifuge via air or metal, forming cooling (fast, stable, and reliable cooling). The return port of the refrigeration compressor 13 is connected to the outlet end of the coiled copper tube via a refrigerant return pipe 10. A return flow on / off valve 12 is installed on the refrigerant return pipe 10. The return flow on / off valve 12 controls the return of excess refrigerant to the compressor. Sealing gaskets are provided at the connections between the sealed housing and the refrigerant inlet pipe 9, the refrigerant return pipe 10, and the vacuum pipe.

[0021] The centrifuge chamber 7 is equipped with a high-precision temperature sensor to provide feedback on the ambient temperature of the centrifuge chamber. The temperature sensor detects the temperature inside the centrifuge shell 1 and transmits it to the PLC controller. The PLC controller automatically controls the opening and closing of the feed valve 11 and the return valve 12, as well as the opening size, to automatically control the temperature inside the centrifuge shell 1, so as to achieve precise control of the centrifuge chamber temperature within ±1° when the centrifuge is working at high speed.

[0022] In a preferred embodiment, a radiator 14 is installed on the heat dissipation surface of the refrigeration compressor 13. The radiator 14 is a conventional finned radiator with built-in heat pipes to improve heat dissipation efficiency. A cooling fan is also installed to improve airflow and further enhance heat dissipation. The cooling fan, refrigeration compressor 13, feed on / off valve 11, return flow off valve 12, temperature sensor, vibration sensor 8, high-speed brushless motor 2, vacuum pump, and vacuum shut-off valve 16 are all powered by an external power supply and controlled by an external PLC controller. The PLC controller is preferably a Siemens S7 series PLC controller, and the methods used by the PLC controller to control the above electronic components are all commonly used methods in the prior art.

[0023] The PLC controller, cooling fan, refrigeration compressor 13, feed on / off valve 11, return flow cut-off valve 12, temperature sensor, vibration sensor 8, high-speed brushless motor 2, vacuum pump and vacuum shut-off valve 16 used in this application are all commonly used electronic components in the prior art. Their specific structure, working principle, control method and circuit connection are all well known technologies and will not be described in detail here.

[0024] Optionally, this centrifuge can rotate at a high speed of 15000r / min and automatically position itself after stopping, and can effectively control the cooling temperature of the internal chamber of the centrifuge; the motor can automatically position itself at 360°±1° during each process, and the angle is controlled by a brushless motor and an algorithm, which adopts existing conventional control algorithms.

[0025] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-noise horizontal rotor high-speed refrigerated centrifuge, comprising a centrifuge housing (1), characterized in that: The centrifuge housing (1) has an internal centrifuge cavity (7) inside. The internal centrifuge cavity (7) is equipped with a copper coil connected to the refrigeration unit. The centrifuge housing (1) is connected to a vacuum shut-off valve (16) through a vacuum tube. The vacuum shut-off valve (16) is connected to the vacuum system (15) through a conduit.

2. The low-noise horizontal rotor high-speed refrigerated centrifuge according to claim 1, characterized in that: A high-speed brushless motor (2) is installed inside the centrifuge housing (1). A horizontal rotor body (4) is installed on the output shaft of the high-speed brushless motor (2) by a locking nut (3). Several hanging ears (5) are evenly fixed around the horizontal rotor body (4) by screws. A hanging basket (6) is rotatably arranged between adjacent hanging ears (5).

3. The low-noise horizontal rotor high-speed refrigerated centrifuge according to claim 1, characterized in that: A vibration sensor (8) is provided on the lower side of the centrifuge housing (1).

4. A low-noise horizontal rotor high-speed refrigerated centrifuge according to claim 1, characterized in that: The refrigeration assembly includes a refrigeration compressor (13). The outlet of the refrigeration compressor (13) is connected to the inlet end of the copper tube through a refrigerant inlet pipe (9). An inlet on / off valve (11) is installed on the refrigerant inlet pipe (9). The return port of the refrigeration compressor (13) is connected to the outlet end of the copper tube through a refrigerant return pipe (10). A return flow shut-off valve (12) is installed on the refrigerant return pipe (10).

5. A low-noise horizontal rotor high-speed refrigerated centrifuge according to claim 4, characterized in that: A radiator (14) is installed on the heat dissipation surface of the refrigeration compressor (13).

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