Vacuum system of a low-temperature high-speed centrifuge

Abstract

This invention provides a vacuum system for a low-temperature high-speed centrifuge, applicable to the field of centrifuge vacuum technology. It includes a housing, a vacuum assembly, and a temperature control assembly. The housing contains a cavity, within which the centrifuge is fixed and operates. The vacuum assembly and the temperature control assembly are connected to the cavity. By connecting the cavity through the vacuum assembly, internal air is reduced, friction is decreased, resulting in advantages such as reduced air friction, lower temperature rise, reduced noise and energy consumption, and improved equipment stability and bearing reliability.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge vacuum technology, and in particular to a vacuum system for a low-temperature high-speed centrifuge. Background Technology

[0002] When operating at temperatures ranging from -20°C to 40°C, cryogenic high-speed centrifuges require a high vacuum environment of ≤150 mbar within the chamber to ensure equipment functionality. However, during high-speed rotor rotation, continuous friction occurs with residual air within the chamber, causing a rapid rise in internal temperature. This leads to significantly increased overall machine noise, abnormally increased motor power consumption, and excessive bearing load. This frictional effect not only directly weakens the long-term reliability of the bearings but may also induce strong resonance when the rotor linear velocity approaches the speed of sound, further exacerbating noise levels and equipment vibration, severely impacting the centrifuge's stability and lifespan. Although existing technologies commonly employ refrigeration to cool the chamber, these methods only partially alleviate the temperature rise problem and have extremely limited effectiveness in improving core defects such as friction-induced noise, increased energy consumption, and decreased bearing reliability. They cannot fundamentally eliminate the multiple negative impacts of air friction. Therefore, existing technologies are significantly inadequate in addressing the air friction-related defects in high-speed centrifuge operation.

[0003] Therefore, a vacuum system for a low-temperature high-speed centrifuge is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum system for a low-temperature high-speed centrifuge, which has the advantages of reducing air friction in the cavity, reducing temperature rise, noise and energy consumption, and improving equipment stability and bearing reliability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The vacuum system of the low-temperature high-speed centrifuge according to an embodiment of the present invention includes: a shell, a vacuum component, and a temperature control component. The shell has a cavity inside, the centrifuge is fixed in the cavity and operates therein, the vacuum component is connected to the cavity, and the temperature control component is connected to the cavity.

[0006] The vacuum system of the low-temperature high-speed centrifuge according to the present invention reduces internal air by connecting the cavity through the vacuum component, thereby reducing friction effect. It has the advantages of reducing air friction, reducing temperature rise, noise and energy consumption, and improving equipment stability and bearing reliability.

[0007] In addition, the vacuum system of the low-temperature high-speed centrifuge according to the above embodiments of this utility model may also have the following additional technical features: In some embodiments of this utility model, the vacuum assembly includes a vacuum pump, which is installed inside the housing and communicates with the interior of the cavity.

[0008] In some embodiments of this utility model, the vacuum assembly further includes a connecting pipe, one end of which is connected to the vacuum pump, and the other end of which is connected to the cavity.

[0009] In some embodiments of this utility model, the vacuum assembly further includes a switch element installed on the connecting pipeline, which connects or disconnects the vacuum pump and the cavity.

[0010] In some embodiments of this utility model, the vacuum assembly further includes a vacuum detection element, which is installed on the connecting pipe and communicates with the cavity. The vacuum detection element is electrically or communicatively connected to the switch element.

[0011] In some embodiments of this invention, the vacuum assembly further includes a filter element installed between the vacuum pump and the cavity.

[0012] In some embodiments of this utility model, a cover plate is also included. One end face of the cavity is provided with an opening, and a clearance opening is formed on the housing. The opening communicates with the external environment through the clearance opening, and the cover plate is detachably installed at the opening to seal the opening.

[0013] In some embodiments of this utility model, a first sealing element is further included, which is fixedly installed on the cover plate and seals the opening with the cover plate.

[0014] In some embodiments of this utility model, a second sealing member is further included. The second sealing member is installed at the opening and cooperates with the first sealing member to seal the opening.

[0015] In some embodiments of this utility model, the housing further includes a first locking member and a second locking member. The first locking member is installed on one end face of the cover plate near the cavity, and the second locking member is installed on the housing. The first locking member and the second locking member are configured to cooperate with each other.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the vacuum system structure of the low-temperature high-speed centrifuge according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the vacuum system structure of the low-temperature high-speed centrifuge according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the vacuum system structure of the low-temperature high-speed centrifuge according to an embodiment of the present invention. Figure 3 .

[0018] Figure Labels 1. Housing; 2. Vacuum assembly; 3. Temperature control assembly; 4. Chamber; 5. Vacuum pump; 6. Switch; 7. Vacuum detection component; 8. Filter; 9. Connecting pipe; 10. Cover plate; 11. Opening; 12. Clearance opening; 13. First seal; 14. Second seal; 15. First locking element; 16. Second locking element; 17. Through hole. Detailed Implementation

[0019] The vacuum system of a low-temperature high-speed centrifuge according to the present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0020] In the description of this specification, terms such as "one embodiment" or "some embodiments" mean that one or more embodiments of this specification include a particular feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0021] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] Traditional cryogenic high-speed centrifuges experience intense friction between the rotor and the air inside the centrifuge chamber during high-speed operation, leading to increased chamber temperature, increased overall noise, higher power consumption, and directly reduced bearing reliability. Despite refrigeration measures, the improvement in overall performance is limited, and significant noise and resonance are still generated near the speed of sound, further increasing motor power consumption and bearing load.

[0023] In response to this, the present invention proposes a vacuum system for a low-temperature high-speed centrifuge. The vacuum system of the low-temperature high-speed centrifuge according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0024] The vacuum system of the low-temperature high-speed centrifuge according to an embodiment of the present invention, such as Figure 1 , Figure 3 As shown, it includes: a housing 1, a vacuum assembly 2, and a temperature control assembly 3. The housing 1 has a cavity 4 inside, and the centrifuge is fixed and operates inside the cavity 4. The vacuum assembly 2 is connected to the cavity 4, and the temperature control assembly 3 is connected to the cavity 4.

[0025] Specifically, the housing 1 is designed as the external structure of the system, and its internal space is rationally divided. Inside the housing 1, one or more cavities 4 are provided. Each cavity 4 can be a separate sealed container or a single-piece molded enclosed area. The cavity 4 is designed to provide the centrifuge with an isolated working space, enabling it to operate in a controlled environment.

[0026] The centrifuge is fixed inside the cavity 4 for operation. The centrifuge can be fixed using various mechanical connection methods such as bolts, clips, or welding to ensure stability during high-speed operation. The centrifuge operates within the cavity 4, allowing its rotor to rotate in a relatively enclosed and adjustable environment.

[0027] The vacuum assembly 2 is configured to communicate with the cavity 4. This communication can be achieved through a pipe, channel, or direct interface. The function of the vacuum assembly 2 is to actively extract gas from inside the cavity 4 to reduce the gas pressure inside the cavity 4. For example, the vacuum assembly 2 can be a simple air extraction device that manually or electrically expels air from inside the cavity 4. In another implementation, the vacuum assembly 2 can be an integrated module with air extraction capabilities, connected to the cavity 4 through one or more ports to perform depressurization operations inside the cavity 4.

[0028] The temperature control component 3 is also configured to communicate with the cavity 4. This communication can be through direct heat exchange contact or through a piping system of circulating media. The function of the temperature control component 3 is to regulate and maintain the temperature inside the cavity 4. For example, the temperature control component 3 can be a simple cooling or heating unit that changes the temperature of the cavity 4 by directly contacting the outer wall or internal heat sink of the cavity 4. In another implementation, the temperature control component 3 can be a circulating system containing coolant or heating fluid that carries heat away from or transfers heat to the cavity 4 through pipes to achieve precise temperature control of the cavity 4.

[0029] This invention, by setting the cavity 4 inside the housing 1 and operating the centrifuge within it, combined with the vacuum component 2 to reduce the pressure in the cavity 4 and the temperature control component 3 to regulate the temperature of the cavity 4, effectively reduces the friction between the centrifuge rotor and the air. This significantly reduces the temperature rise of the cavity 4, overall machine noise, and motor power consumption during high-speed operation, while improving the operational reliability of the bearings and ensuring stable and efficient operation of the centrifuge under low-temperature, high-speed conditions.

[0030] In some embodiments of this utility model, such as Figure 1 , Figure 3 As shown, the vacuum assembly 2 includes a vacuum pump 5, which is installed inside the housing 1 and communicates with the interior of the cavity 4.

[0031] Specifically, the vacuum pump 5 is a device used to remove gas from a sealed space to reduce the pressure within the space. For example, a rotary vane vacuum pump 5 can be used, which uses a rotating rotor and vanes to expel gas from the inlet; or a diaphragm vacuum pump 5 can be used, which uses the reciprocating motion of a diaphragm to achieve gas suction and discharge, offering the advantage of no oil contamination. Furthermore, turbomolecular pumps or diffusion pumps can be selected depending on the required vacuum level. As the core component of the vacuum assembly 2, its main function is to provide continuous pumping capacity to quickly and effectively reduce the pressure inside the cavity 4.

[0032] Specifically, the vacuum pump 5 can be directly fixed to a base inside the housing 1, connected by bolts to ensure stability; alternatively, to further reduce the impact of vibration on the entire system, the vacuum pump 5 can be mounted on a separate vibration-damping bracket, which is then fixed inside the housing 1. This mounting method aims to achieve a high degree of system integration, reduce external space occupation, provide necessary physical protection for the vacuum pump 5, and help reduce operating noise.

[0033] The vacuum pump 5 is connected to the interior of the cavity 4, meaning there is a gas flow path between the air inlet of the vacuum pump 5 and the working cavity 4 of the centrifuge. For example, the air inlet of the vacuum pump 5 can be directly connected to the evacuation port on the cavity 4 via a sturdy metal pipe; alternatively, to accommodate possible installation deviations or vibrations, a flexible corrugated pipe can be used for connection to ensure airtightness and absorb vibrations. This connection method is crucial for achieving vacuuming of the cavity 4, ensuring that the vacuum pump 5 can effectively remove gas from the cavity 4, thereby establishing and maintaining the required vacuum environment.

[0034] Through the above technical solution, the vacuum pump 5 can efficiently remove air from the cavity 4, quickly establishing and maintaining the required vacuum level. The vacuum pump 5 is installed inside the housing 1, achieving a high degree of system integration, reducing external space occupation, and providing physical protection for the vacuum pump 5, thus enhancing the overall stability and reliability of the system. The direct communication between the vacuum pump 5 and the interior of the cavity 4 ensures a direct and efficient air extraction path, minimizing gas transmission losses and thereby improving the efficiency of vacuum creation. Efficient vacuuming significantly reduces friction between the centrifuge rotor and residual air in the cavity 4, lowering the temperature rise of the cavity 4, overall machine noise, power consumption, and bearing load, thereby improving the centrifuge's operating performance and bearing reliability.

[0035] In some embodiments of this utility model, such as Figure 2 , Figure 3 As shown, the vacuum assembly 2 also includes a switch 6, which is installed on the connecting pipe 9. The switch 6 connects or disconnects the vacuum pump 5 and the cavity 4.

[0036] The switch 6 is a device for controlling the opening or closing of a fluid passage. Specifically, the switch 6 can be an electric valve, such as a solenoid valve or an electric ball valve, which controls its opening or closing state by receiving an electrical signal. Alternatively, the switch 6 can be a pneumatic valve, driven by a pneumatic pressure signal. In some embodiments, the switch 6 can also be a manual valve, allowing manual operation to connect or disconnect the vacuum pump 5 and the cavity 4. The switch 6 is installed between the vacuum pump 5 and the cavity 4 to ensure effective isolation or connection between them, thereby precisely controlling the vacuum path. For example, the switch 6 can be directly installed between the inlet pipe of the vacuum pump 5 and the suction port of the cavity 4 via a threaded or flanged connection. Alternatively, the switch 6 can be connected in series between the vacuum pump 5 and the cavity 4 via the connecting pipe 9, ensuring it is located on the critical path of vacuum extraction. The switch 6 can connect or disconnect the vacuum pump 5 and the cavity 4, providing the function of controlling the connection state between the vacuum pump 5 and the cavity 4 as needed, and realizing precise management of vacuum extraction. When it is necessary to evacuate the cavity 4, the switch 6 is in the connected state, allowing the vacuum pump 5 to evacuate the cavity 4. When the cavity 4 reaches a preset vacuum level or the vacuum pump 5 needs to stop working, the switch 6 is in the disconnected state, isolating the vacuum pump 5 from the cavity 4 to maintain the vacuum level within the cavity 4.

[0037] Through the above technical solution, during the operation of the low-temperature high-speed centrifuge, when the vacuum level inside the chamber 4 reaches the required level, the switch 6 can disconnect the vacuum pump 5 from the chamber 4, allowing the vacuum pump 5 to stop working or enter standby mode, thereby significantly reducing the energy consumption of the vacuum system in maintaining vacuum. Simultaneously, through the control of the switch 6, the operating mode of the vacuum pump 5 can be flexibly adjusted according to different stages of centrifuge operation (such as startup, stable operation, and shutdown), improving the system's operational flexibility and automation. This helps extend the service life of the vacuum pump 5 and reduce the overall operating cost of the equipment, effectively solving the problems of increased energy consumption and inflexible operation caused by continuous operation of the vacuum pump 5.

[0038] In some embodiments of this utility model, such as Figure 2 , Figure 3 As shown, the vacuum assembly 2 also includes a vacuum detection element 7, which is installed on the connecting pipe 9 and communicates with the cavity 4. The vacuum detection element 7 is electrically or communicatively connected to the switch element 6.

[0039] Specifically, the vacuum detection element 7 is a device used to measure the gas pressure inside the cavity 4 in real time. It can be implemented using various technologies, such as a capacitive thin-film vacuum gauge, which reflects the vacuum level by measuring the capacitance change caused by the deformation of the thin film under different pressures; or a piezoresistive vacuum gauge, which reflects the vacuum level by measuring the resistance change of the piezoresistive element. The vacuum detection element 7 is connected to the cavity 4, ensuring that it can directly and accurately sense the vacuum level inside the cavity 4, avoiding interference from external environmental factors on the measurement results, thereby improving the real-time performance and reliability of the vacuum level data. An electrical or communication connection is established between the vacuum detection element 7 and the switch element 6. For example, analog or digital signals can be directly transmitted via cable, enabling the controller of the switch element 6 to receive vacuum level data in real time; or data interaction can be achieved through communication protocols such as RS485, CAN bus, and Ethernet, realizing efficient information transmission between the vacuum detection element 7 and the controller of the switch element 6.

[0040] Through the above technical solution, the vacuum detection element 7 can acquire the vacuum level information inside the cavity 4 in real time and accurately, and transmit it to the switching element 6. Based on the received vacuum level data, the switching element 6 can intelligently determine whether to start or stop the vacuum pump 5, or adjust its operating state, thereby achieving precise control of the vacuum level inside the cavity 4. This effectively solves the problem of untimely or inaccurate operation of the switching element 6 due to the lack of real-time detection in traditional solutions, ensuring that the vacuum system can dynamically maintain the required vacuum level, significantly improving the stability and operating efficiency of the low-temperature high-speed centrifuge vacuum system, while reducing energy consumption and extending equipment life.

[0041] In some embodiments of this utility model, such as Figure 1 , Figure 3 As shown, the vacuum assembly 2 also includes a filter element 8, which is installed between the vacuum pump 5 and the cavity 4.

[0042] Specifically, the filter element 8 is a device for removing solid particles, droplets, or other impurities from an airflow. The filter element 8 can be implemented in various ways. For example, the filter element 8 can employ a mechanical filtration principle, using porous filter media (such as filter paper, sintered metal, ceramic, or polymer membranes) to physically block and retain impurity particles. Alternatively, the filter element 8 can employ an adsorption filtration principle, using activated carbon or other adsorbents to adsorb harmful gases or small particles in the airflow. Or, the filter element 8 can employ an electrostatic filtration principle, using electrostatic charges to attract and capture charged particles in the airflow. The filter element 8 is installed between the vacuum pump 5 and the cavity 4. This location ensures that during the vacuum pump 5's evacuation of the cavity 4, all gas exiting the cavity 4 must pass through the filter element 8 before entering the vacuum pump 5, thereby effectively intercepting any impurities that may be carried in the gas. The filter element 8 can be directly integrated into the air inlet of the vacuum pump 5, forming an integrated structure. Alternatively, the filter element 8 can be a separate module connected between the air outlet of the cavity 4 and the air inlet of the vacuum pump 5 via the connecting pipe 9. Furthermore, the filter element 8 can be designed as a detachable structure for easy periodic replacement or cleaning to maintain its filtration efficiency.

[0043] Through the above technical solution, when the vacuum assembly 2 evacuates the cavity 4, the gas inside the cavity 4 passes through the filter element 8 before entering the vacuum pump 5. The filter element 8 effectively intercepts any solid particles, droplets, or other contaminants that may be present in the gas, preventing these impurities from entering the vacuum pump 5, thereby avoiding wear and damage to the vacuum pump 5 and extending its service life. Simultaneously, the filter element 8 also prevents the accumulation of impurities inside the vacuum pump 5, ensuring stable operation and efficient pumping capacity. Furthermore, the purification of the gas through the filter element 8 avoids secondary pollution of the internal environment of the cavity 4 by impurities, helping to maintain a high level of cleanliness and a stable vacuum inside the cavity 4, which is crucial for the working performance and accuracy of experimental results of the low-temperature high-speed centrifuge. Therefore, this solution significantly improves the reliability, stability, and ease of maintenance of the vacuum system.

[0044] In some embodiments of this utility model, such as Figure 3 As shown, the vacuum assembly 2 also includes a connecting pipe 9, one end of which is connected to the vacuum pump 5, and the other end of which is connected to the cavity 4.

[0045] The connecting pipe 9 is a component used to establish an airtight fluid channel between the vacuum pump 5 and the cavity 4. Its main function is to guide gas from the cavity 4 to the vacuum pump 5, thereby realizing the vacuuming process inside the cavity 4. The connecting pipe 9 can be made of various materials and structures. For example, it can be made of pressure-resistant and corrosion-resistant metal materials (such as stainless steel or copper alloys) to ensure long-term stable operation in a vacuum environment; or it can be made of polymer materials with good flexibility and sealing performance (such as Teflon or rubber) to facilitate installation and adapt to certain vibrations. In addition, the connecting pipe 9 can also be designed with a corrugated structure to further enhance its flexibility and vibration damping capabilities.

[0046] One end of the connecting pipe 9 is connected to the vacuum pump 5. This connection method is designed to ensure that the vacuum pump 5 can efficiently and leak-free extract gas from the connecting pipe 9. Specifically, one end of the connecting pipe 9 can be connected to the air inlet of the vacuum pump 5 in various ways. For example, a threaded connection can be used, achieving a tight fit through thread engagement and a sealing gasket; or a flange connection can be used, achieving a reliable seal through a flange, sealing ring, and fasteners; or a welded connection can be used to obtain extremely high airtightness and structural strength.

[0047] The other end of the connecting pipe 9 is connected to the cavity 4. This connection method is designed to ensure that the vacuum pumped by the vacuum pump 5 can directly and effectively act on the inside of the cavity 4, thereby quickly establishing and maintaining the vacuum environment of the cavity 4. The connection method between the other end of the connecting pipe 9 and the cavity 4 is also varied. For example, a threaded connection or flange connection similar to that of the vacuum pump 5 can be used to ensure airtightness at the interface with the cavity 4; alternatively, a conical sealing connection can be used, achieving self-sealing through conical surface fit and clamping force; or, an insertion connection can be used, sealing the interface of the cavity 4 with an O-ring or sealing rubber ring.

[0048] Through the above technical solution, this utility model provides a specific and reliable connection between the vacuum pump 5 and the cavity 4 by introducing the connecting pipe 9, effectively solving the problem of potentially unreliable connection methods leading to poor vacuum sealing. The connecting pipe 9, as a dedicated physical channel component, expands the structure of the vacuum assembly 2, avoiding the instability that may result from direct connection. One end of the connecting pipe 9 is connected to the vacuum pump 5, ensuring effective transmission of the pumping capacity of the vacuum pump 5 and avoiding energy loss; the other end of the connecting pipe 9 is connected to the cavity 4, ensuring that the vacuum can directly act on the interior of the cavity 4, significantly reducing the risk of leakage. Overall, this design enhances the sealing performance of the vacuum system, helping to maintain a more stable vacuum environment inside the cavity 4 during the operation of the low-temperature, high-speed centrifuge, thereby effectively reducing problems such as increased temperature in the cavity 4, increased noise, and increased power consumption caused by rotor-air friction, and ultimately improving system operating efficiency and bearing reliability.

[0049] In some embodiments of this utility model, such as Figure 1 , Figure 2 As shown, it also includes a cover plate 10. One end face of the cavity 4 is provided with an opening 11. An avoidance opening 12 is formed on the housing 1. The opening 11 communicates with the external environment through the avoidance opening 12. The cover plate 10 is detachably installed at the opening 11 to seal the opening 11.

[0050] Specifically, the cover plate 10 is a structural component used to cover and close the opening 11. It can be made of a metallic material, such as stainless steel or aluminum alloy, to provide sufficient strength and rigidity to withstand the internal and external pressure difference and to cooperate with the sealing element to form a reliable seal; or, the cover plate 10 can also be made of a polymeric material, such as engineering plastics or composite materials, to achieve lightweight and potentially provide better insulation performance, while ensuring its sealing function through structural design.

[0051] The cavity 4 has an opening 11 on one end face. This opening 11 is a channel for loading and unloading centrifugal rotors, samples, or for maintenance. It can be circular or rectangular, and its size and shape are designed according to the size of the centrifuge rotor and operational requirements. Its edges can be chamfered or reinforced to improve structural strength and facilitate the installation of seals. The housing 1 has a clearance opening 12, which is a structure on the housing 1 corresponding to the position of the opening 11 in the cavity 4. Its function is to provide a channel for the opening 11 in the cavity 4 to the external environment, so as to facilitate the installation and removal of the cover plate 10. The clearance opening 12 can be a hole directly drilled in the housing 1, with a size slightly larger than the opening 11 in the cavity 4 to ensure operating space; or the clearance opening 12 can be a structure formed in the housing 1 by casting or welding, and its inner wall can be precision machined to ensure the fitting accuracy with the cover plate 10. The opening 11 connects to the external environment through the clearance opening 12, meaning that when the cover plate 10 is not installed, there is a direct physical connection path between the interior of the cavity 4 and the external environment. The cover plate 10 is detachably installed at the opening 11 to seal the opening 11. The detachable installation can be achieved by means of bolts, clips, or quick-locking mechanisms, ensuring that the cover plate 10 can be easily installed and removed, while providing sufficient sealing pressure after installation. Sealing the opening 11 can be achieved by setting a sealing ring, such as an O-ring or lip seal, on the cover plate 10 or the edge of the opening 11. The sealing ring is compressed after the cover plate 10 is installed in place, forming an airtight connection.

[0052] By employing the above technical solution, before the low-temperature high-speed centrifuge operates, the cover plate 10 is detachably installed at the opening 11 of the cavity 4 and sealed, effectively isolating the interior of the cavity 4 from the external environment. This sealing action blocks the path of external air into the cavity 4 through the opening 11 of the cavity 4 and the clearance opening 12 of the housing 1. Combined with the vacuum assembly 2, after the cover plate 10 is sealed, the vacuum assembly 2 can efficiently evacuate the cavity 4, quickly reaching and maintaining the required vacuum level. Simultaneously, because the interior of the cavity 4 is isolated from the external environment, the temperature control assembly 3 can more stably and efficiently control the internal temperature of the cavity 4 precisely, reducing the influence of the external environment on the temperature of the cavity 4. By maintaining a high vacuum environment inside the cavity 4, the friction between the centrifugal rotor and air is significantly reduced, thereby effectively suppressing the temperature rise of the cavity 4, reducing the noise during operation, and reducing the power consumption of the motor. Furthermore, a stable vacuum and temperature environment also helps extend the service life of the bearings and improves the reliability of the equipment. The detachable installation method also ensures ease of operation, making it convenient for users to load and unload samples and maintain the equipment.

[0053] In some embodiments of this utility model, such as Figure 1 As shown, it also includes a first sealing element 13, which is fixedly installed on the cover plate 10 and seals the opening 11 with the cover plate 10.

[0054] The first seal 13 is an elastic or flexible component used to form an airtight or liquid-tight barrier between two contact surfaces. Specifically, the first seal 13 can take various forms, such as O-rings, rectangular rings, lip seals, etc., and its material can be an elastomer with good elasticity and low-temperature resistance, such as rubber, silicone, or fluororubber. Alternatively, the first seal 13 can also be a gasket made of cork, fiber, metal, or composite materials, which fills minute irregularities on the mating surfaces through compression deformation, thereby achieving a seal. The introduction of the first seal 13 aims to provide an additional sealing layer to enhance the overall sealing performance.

[0055] Fixed installation on the cover plate 10 means establishing a stable and immobile connection between the first sealing element 13 and the cover plate 10 to ensure the accuracy of its position and the continuity of its sealing effect during operation. Specifically, the first sealing element 13 can be firmly bonded to a specific position on the cover plate 10 using adhesive, or it can be embedded in a groove or recess on the cover plate 10, utilizing its own elasticity or snap-fit ​​structure for fixation. Alternatively, mechanical fastening methods can be used, such as using bolts or rivets to press or fix the first sealing element 13 onto the cover plate 10 to prevent displacement or loosening during use.

[0056] Sealing the opening 11 with the cover plate 10 means that the first sealing element 13 and the cover plate 10 work together to airtightly seal the opening 11 of the cavity 4. Specifically, the first sealing element 13 can be installed on the edge or inside of the cover plate 10. When the cover plate 10 is closed and engages with the opening 11, the first sealing element 13 is compressed and deformed, thereby forming a tight contact with the edge of the opening 11, filling the gap, and effectively preventing the entry of external air. This cooperative sealing mechanism ensures that a stable vacuum environment can be maintained inside the cavity 4 when the cover plate 10 is closed.

[0057] Through the above technical solution, the first sealing element 13 is introduced and fixedly installed on the cover plate 10. The first sealing element 13 and the cover plate 10 work together to seal the opening 11. This design ensures that when the cover plate 10 is closed, the first sealing element 13 can fit tightly against the edge of the opening 11, providing an additional sealing barrier and effectively compensating for any potential sealing issues with the cover plate 10 itself. Since the first sealing element 13 is firmly fixed to the cover plate 10, displacement or loosening during use is avoided, thus ensuring the stability and reliability of the sealing effect. This dual sealing mechanism effectively prevents external air from entering the cavity 4, maintaining a stable vacuum environment inside the cavity 4, thereby reducing friction between the centrifuge rotor and air, reducing temperature rise in the cavity 4, increased noise, and increased power consumption, and improving bearing reliability.

[0058] In some embodiments of this utility model, such as Figure 1 , Figure 3 As shown, it also includes a second seal 14, which is installed at the opening 11 and cooperates with the first seal 13 to seal the opening 11.

[0059] Specifically, the second sealing element 14 can be implemented in various forms. For example, it can be an elastic sealing ring, such as an O-ring, rectangular ring, or X-ring, made of elastic materials such as rubber, silicone, or fluororubber. It fills the tiny gaps between the mating surfaces through its own deformation under pressure, thereby achieving a seal. Alternatively, the second sealing element 14 can also be a metal sealing gasket, such as a gasket made of copper, aluminum, or stainless steel. It tightly fits the mating surfaces through the plastic or elastic deformation of the material, forming an effective sealing barrier.

[0060] The second seal 14 is installed at the opening 11, specifically in the area of ​​the opening 11 that connects the cavity 4 to the external environment. Specifically, the second seal 14 can be installed in a pre-set groove on the inner wall of the opening 11 to form a sealing fit with the edge of the cover plate 10. Alternatively, the second seal 14 can be installed on the outer edge plane of the opening 11, in close contact with the inner plane of the cover plate 10, thereby providing a seal when the cover plate 10 is closed.

[0061] Furthermore, the second seal 14 cooperates with the first seal 13 to seal the opening 11, jointly completing the sealing of the opening 11. This cooperation can take various forms. For example, the second seal 14 can form a series sealing structure with the first seal 13, that is, in the gas leakage path, the second seal 14 is located after or before the first seal 13, forming two independent sealing barriers. Even if one seal fails slightly, the other can still provide effective blocking. Alternatively, the second seal 14 can also form a parallel sealing structure with the first seal 13, that is, both provide sealing on different contact surfaces, sharing the sealing load, or providing protection against potential leakage paths in different directions, thereby significantly improving the overall reliability and stability of the seal.

[0062] Through the above technical solution, a second sealing element 14 is added to the original first sealing element 13, and it cooperates with the first sealing element 13 to seal the opening 11. This dual sealing structure significantly enhances the sealing effect at the opening 11, effectively solving the problem of insufficient sealing or reliability that may exist with a single seal. As an independent sealing element, the second sealing element 14 directly provides additional protection for potential leakage points, compensating for any gaps or wear defects that may exist in the first sealing element 13. Its synergistic effect with the first sealing element 13, by forming a series or parallel sealing barrier, increases the redundancy and tightness of the seal, thereby effectively preventing vacuum leakage. This ensures the long-term stable maintenance of the vacuum environment inside the cavity 4, significantly reduces the friction between the rotor and the residual air inside the cavity 4 when the centrifuge is running at high speed, thereby reducing the temperature rise of the cavity 4, the noise increase of the whole machine, and the power consumption, and improving the reliability of the bearings and the overall operating efficiency of the centrifuge.

[0063] In some embodiments of this utility model, such as Figure 3 As shown, the second sealing member 14 has a through hole 17 that mates with the connecting pipe 9, allowing the connecting pipe 9 to communicate with the interior of the cavity 4. By providing the through hole 17 on the second sealing member 14, the direct communication between the connecting pipe 9 and the cavity 4 is avoided, preventing damage to the integrity of the cavity 4 and improving the sealing performance of the cavity 4. Simultaneously, by providing the through hole 17 on the second sealing member 14 to mate with the connecting pipe 9, the second sealing member 14 can improve the sealing performance at the through hole 17, preventing the communication between the connecting pipe 9 and the interior of the cavity 4 from compromising the sealing performance of the cavity 4.

[0064] In some embodiments of this utility model, such as Figure 1As shown, the housing 1 also includes a first locking member 15 and a second locking member 16. The first locking member 15 is installed on one end face of the cover plate 10 near the cavity 4, and the second locking member 16 is installed on the housing 1. The first locking member 15 and the second locking member 16 are configured to cooperate with each other.

[0065] The first locking member 15 is a mechanical structure used to fix and lock the cover plate 10. Specifically, the first locking member 15 can be designed as a hook-shaped structure, with one end fixed to the cover plate 10 and the other end extending out to engage with the second locking member 16; alternatively, the first locking member 15 can also be a protrusion or pin formed on the cover plate 10 for insertion or engagement into a corresponding groove or hole in the second locking member 16. Furthermore, the first locking member 15 can also employ an eccentric wheel or cam mechanism, using rotation to press or release the second locking member 16. Its main function is to provide an interface for mechanical connection with the second locking member 16 on the housing 1, thereby achieving a secure fixation of the cover plate 10.

[0066] The second locking member 16 is a mechanical structure that cooperates with the first locking member 15 and is installed on the housing 1. Specifically, when the first locking member 15 is a hook-shaped structure, the second locking member 16 can be designed as a matching annular or rod-shaped structure for hooking; when the first locking member 15 is a protrusion or pin, the second locking member 16 can be designed as a matching groove, hole, or snap-fit ​​structure for receiving and fixing. Furthermore, when the first locking member 15 is an eccentric wheel or cam mechanism, the second locking member 16 can be designed as a cooperating pressure plate or limiting block for pressing or limiting the first locking member 15 when it rotates. Its main function is to provide a stable fixing point for the first locking member 15, jointly completing the locking of the cover plate 10.

[0067] The engagement of the first locking member 15 and the second locking member 16 refers to their interaction through a mechanical structure, thereby securing the cover plate 10. For example, the hook of the first locking member 15 can hook onto the ring of the second locking member 16, locking it manually or automatically; alternatively, the pin of the first locking member 15 can be inserted into the hole of the second locking member 16 and secured by rotation or a spring mechanism; or, the cam of the first locking member 15 can rotate, pressing the cover plate 10 against the housing 1, with the second locking member 16 providing a reaction force to achieve a tight seal. This engagement ensures that the cover plate 10 maintains its position and seal even under high-speed centrifuge operation and vacuum conditions.

[0068] Through the above technical solution, the cooperation of the first locking member 15 and the second locking member 16 allows the cover plate 10 to be firmly fixed at the opening 11 of the cavity 4. This effectively prevents the cover plate 10 from loosening or shifting when the centrifuge experiences severe vibrations during high-speed operation or when the vacuum pressure inside the cavity 4 changes, thereby ensuring the sealing integrity between the cover plate 10 and the opening 11 and preventing vacuum leakage. The stable maintenance of the vacuum environment allows the temperature control component 3 to more effectively cool the cavity 4, ensuring the stability of the low-temperature environment. Consequently, the friction between the rotor and the residual air inside the cavity 4 is significantly reduced, thereby reducing the temperature rise of the cavity 4, overall noise increase, and energy consumption. Simultaneously, the load on the bearings is also reduced, effectively improving their reliability. Overall, this solution significantly enhances the operational stability and reliability of the low-temperature high-speed centrifuge under harsh operating conditions.

[0069] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A vacuum system for a low-temperature high-speed centrifuge, characterized in that, include: The centrifuge comprises a housing, a vacuum assembly, and a temperature control assembly. The housing has an internal cavity into which the centrifuge is fixed and operates. The vacuum assembly and the temperature control assembly are connected to the cavity.

2. The vacuum system of the low-temperature high-speed centrifuge according to claim 1, characterized in that, The vacuum assembly includes a vacuum pump, which is installed inside the housing and communicates with the interior of the cavity.

3. The vacuum system of the low-temperature high-speed centrifuge according to claim 2, characterized in that, The vacuum assembly also includes a connecting pipe, one end of which is connected to the vacuum pump and the other end of which is connected to the cavity.

4. The vacuum system of the low-temperature high-speed centrifuge according to claim 3, characterized in that, The vacuum assembly also includes a switch, which is installed on the connecting pipe and connects or disconnects the vacuum pump and the cavity.

5. The vacuum system of the low-temperature high-speed centrifuge according to claim 4, characterized in that, The vacuum assembly also includes a vacuum detection element, which is installed on the connecting pipe and communicates with the cavity. The vacuum detection element is electrically or communicatively connected to the switch.

6. The vacuum system of the low-temperature high-speed centrifuge according to claim 2, characterized in that, The vacuum assembly also includes a filter element installed between the vacuum pump and the cavity.

7. The vacuum system of the low-temperature high-speed centrifuge according to claim 1, characterized in that, It also includes a cover plate, an opening on one end face of the cavity, a clearance opening formed on the housing, the opening communicating with the external environment through the clearance opening, and the cover plate being detachably installed at the opening to seal the opening.

8. The vacuum system of the low-temperature high-speed centrifuge according to claim 7, characterized in that, It also includes a first sealing element, which is fixedly installed on the cover plate and seals the opening with the cover plate.

9. The vacuum system of the low-temperature high-speed centrifuge according to claim 8, characterized in that, It also includes a second seal, which is installed at the opening and cooperates with the first seal to seal the opening.

10. The vacuum system of the low-temperature high-speed centrifuge according to claim 7, characterized in that, The housing further includes a first locking member and a second locking member. The first locking member is installed on one end face of the cover plate near the cavity, and the second locking member is installed on the housing. The first locking member and the second locking member are configured to cooperate with each other.

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