CN113441288A - Centrifugal machine - Google Patents

Abstract

The application relates to the technical field of centrifugal separation, and discloses a centrifugal machine which comprises a shell, a motor, a rotor and a flow guide cover, wherein the shell is provided with a centrifugal cavity and a motor chamber, the top of the centrifugal cavity is open, the bottom of the centrifugal cavity is provided with a communication hole, and the motor chamber is communicated with the centrifugal cavity through the communication hole; the motor is fixed in the motor chamber, an output shaft end of the motor penetrates through the communicating hole to extend to the centrifugal cavity, and the motor enables the through hole to form an annular vent hole; the rotor is positioned in the centrifugal cavity and fixed on an output shaft of the motor; the air guide cover is sleeved on the motor and horizontally arranged between the bottom of the centrifugal cavity and the rotor. Wherein, the air guide sleeve and the bottom of the centrifugal cavity form an airflow channel. Use the centrifugal separator disclosed in this application, the air in the centrifugal chamber can carry out the air exchange with the environment at centrifugal separator place under the drive of the rotatory pressure differential that produces of rotor to the realization is to the cooling of rotor and motor.

Description

Centrifugal machine

Technical Field

The present application relates to the technical field of centrifuges, for example to a centrifuge.

Background

At present, a centrifuge is widely applied to the fields of colleges and universities, biochemistry, medical health, food safety, life science, agriculture and forestry science, animal husbandry science, biopharmaceutical science and the like, and is equipment for separating components in liquid and solid particles or a mixture of the liquid and the liquid by utilizing centrifugal force generated by high-speed rotation.

When the centrifuge rotates at a high speed, the rotor of the centrifuge can generate a large amount of heat by friction with air, so that the temperature of a centrifugal cavity is increased. Without cooling, it may cause the sample placed in the rotor to fail or be damaged. Some centrifuges are provided with a compressor refrigerating system to cool a centrifugal cavity, but the arrangement form has a complex structure and is expensive in overall cost. The normal temperature centrifuge generally cools the centrifugal cavity through air cooling. Because the rotor is in a high-speed rotation state when the centrifugal machine works, air is rapidly thrown to the periphery of the centrifugal cavity after contacting the rotor, so that the air density in the centrifugal cavity is uneven, and a state that the central air pressure is low and the peripheral air pressure is high is formed. In the existing centrifuge scheme, an air inlet is formed in a low-pressure area in the middle of a centrifugal cavity to suck external air into the centrifugal cavity, air outlets are formed in high-pressure areas around the centrifugal cavity to lead out high-pressure air, and air internal and external circulation is formed. Based on the air heat exchange, outside cold air is sucked into the centrifugal cavity, high-temperature neutralization is generated in the centrifugal cavity by friction with the rotor, and gas at the neutralization temperature is discharged from a peripheral high-pressure area to be cooled.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the centrifugal machine is limited by the structure of the centrifugal machine, the number of the air outlets formed in the high-pressure area is usually small, the hole diameter is small, air flows through the air outlets to generate squeaking, and noise greatly influences user experience; the air inlet of the centrifuge is arranged at the motor, and heat generated by the motor during operation is brought into the centrifugal cavity, so that good heat dissipation cannot be realized.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a centrifugal machine, which aims to solve the problem of how to better improve the heat dissipation effect of the centrifugal machine and reduce the running noise of the whole machine.

In some embodiments, the centrifuge comprises a housing, a motor, a rotor and a flow guide cover, wherein the housing is configured with a centrifugal cavity and a motor chamber, the top of the centrifugal cavity is open, the bottom of the centrifugal cavity is provided with a communication hole, and the motor chamber is communicated with the centrifugal cavity through the communication hole; the motor is fixed in the motor chamber, an output shaft end of the motor penetrates through the communicating hole to extend to the centrifugal cavity, and the motor enables the through hole to form an annular vent hole; the rotor is positioned in the centrifugal cavity and fixed on an output shaft of the motor; the air guide cover is sleeved on the motor and horizontally arranged between the bottom of the centrifugal cavity and the rotor. Wherein, the air guide sleeve and the bottom of the centrifugal cavity form an airflow channel.

The motor is arranged in the communicating hole in a penetrating mode, the communicating hole forms an annular vent hole, the annular vent hole is communicated with the centrifugal cavity and the motor chamber, and air pressure of the motor chamber is normal pressure. The air guide cover is sleeved on the motor and horizontally arranged between the bottom of the centrifugal cavity and the rotor, and an air flow channel is formed between the air guide cover and the bottom of the centrifugal cavity, so that the space in the centrifugal cavity is divided into a rotor cavity positioned above the air guide cover, an air guide cover positioned below the air guide cover and an air flow channel formed at the bottom of the centrifugal cavity by the air guide cover. When the rotor of the centrifuge rotates, the angular velocity of each part of the rotor is the same, the linear velocity close to the position of the rotating shaft is smaller than that of the position of the principle rotating shaft, and the air in the rotor cavity is thrown to the periphery of the rotor cavity under the impact of different parts of the rotor, so that the rotor cavity is in a state that the air around is dense and the air in the middle is thin, namely the air pressure around the rotor cavity is larger than the air in the middle. Meanwhile, the rotor rotates at high speed to generate impact and friction with air, and the temperature of the rotor and the air in the rotor cavity is increased. The air guide sleeve extends to a high-pressure area of the rotor cavity, so that an air flow channel formed at the bottom of the air guide sleeve and the bottom of the centrifugal cavity is communicated with the high-pressure area and the annular ventilation opening of the space where the rotor is located, and the annular ventilation opening is communicated with the normal-pressure motor chamber. Meanwhile, with the discharge of air in a high-pressure area, the middle of the space where the centrifugal cavity rotor is located becomes negative pressure, an air inlet communicated with the environment where the centrifugal machine is located can be arranged in the middle, the air in the environment where the centrifugal machine is located is sucked into the centrifugal cavity, and therefore air circulation is formed. And along with the circulation of air, the high temperature air in the centrifuge is constantly discharged, the normal atmospheric temperature air of the environment where the centrifuge is located is constantly supplemented to the centrifugal cavity, thereby the temperature in the centrifugal cavity is reduced by neutralization exchange, and further, the temperature of the rotor and the sample arranged on the rotor is also reduced, thereby ensuring the temperature safety of the sample.

In some embodiments, the pod includes a pod body and a plurality of flow deflectors secured to the pod body and extending from the pod body toward the airflow passageway, the plurality of flow deflectors and the pod body forming a plurality of airflow guide slots in the airflow passageway.

In some embodiments, the plurality of guide vanes are arc-shaped, the plurality of air flow guide grooves are vortex-shaped air flow guide grooves, and a rotation direction of the plurality of air flow guide grooves coincides with a rotation direction of the rotor.

In some embodiments, the raised height of each of the plurality of flow deflectors in the airflow passage increases gradually from the edge of the body toward the middle of the body.

In some embodiments, the pod further includes a non-return flange secured to an edge of the pod body and extending from the body toward the airflow passage, the non-return flange circumferentially surrounding the pod body along the body.

In some embodiments, a side of each of the plurality of flow deflectors adjacent to the body edge abuts against the non-return bead, and a height of a protrusion of the side of each of the flow deflectors adjacent to the body edge in the airflow channel is equal to a height of a protrusion of the non-return bead in the airflow channel.

In some embodiments, the centrifuge further comprises a dome mounting bracket, the dome mounting bracket comprises a mounting platform and a plurality of support columns, the mounting platform is provided with a mounting hole, and the mounting bracket is sleeved on the motor through the mounting hole and is positioned below the dome; one end of each support column in the plurality of support columns is connected to the mounting platform, the other end of each support column extends to the motor chamber and is fixed to the motor through a bolt, and the air guide sleeve is fixed to the mounting platform.

In some embodiments, the pod is bolted to the motor output shaft side end cap.

In some embodiments, the centrifuge further comprises: the air inlet channel is constructed on the shell, one end of the air inlet channel is communicated with the center of the top of the centrifugal cavity, and the other end of the air inlet channel is communicated with the environment of the centrifugal machine; and the exhaust port is arranged in the motor chamber and communicated with the environment where the motor chamber and the centrifugal machine are located.

In some embodiments, the centrifuge further includes a fan disposed at the air outlet, and the fan guides air from the motor chamber to the environment where the centrifuge is located.

The centrifuge that this disclosed embodiment provided can realize following technological effect:

the air guide cover is sleeved on the motor and horizontally arranged between the bottom of the centrifugal cavity and the rotor, and an air flow channel is formed between the air guide cover and the bottom of the centrifugal cavity, so that the space in the centrifugal cavity is divided into a rotor cavity positioned above the air guide cover, an air guide cover positioned below the air guide cover and an air flow channel formed at the bottom of the centrifugal cavity by the air guide cover. One end of the airflow channel is located in a high-pressure area of the rotor cavity, and the other end of the airflow channel is communicated with the normal-pressure motor chamber through the annular vent hole, so that air in the centrifugal cavity can be exchanged with air in the external environment under the driving of pressure difference by arranging the air guide sleeve, and the centrifugal cavity is effectively cooled in an energy-saving manner under the condition that a refrigerating device or a wind power driving device is not used. The motor is arranged in the communicating hole in a penetrating mode, the communicating hole forms an annular vent hole, the annular vent hole is communicated with the centrifugal cavity and the motor chamber, and air pressure of the motor chamber is normal pressure. The design of annular vent has made the centrifugal chamber have than great air outlet, has not only promoted the circulation of air because of having reduced the air-out resistance, because increased the air outlet effectively reduced the noise when the air-out moreover, has improved user experience. In addition, the annular ventilation opening is located at the motor, and after air entering the centrifugal cavity cools the centrifugal cavity, the motor can be cooled at the motor, so that the stability of the motor in operation is effectively guaranteed.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic cross-sectional structural view of a centrifuge provided in an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of another centrifuge provided in accordance with an embodiment of the present disclosure;

FIG. 3 is a schematic view of a partial structure of a centrifuge provided in an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a portion of another centrifuge according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a pod and pod mounting bracket of a centrifuge according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a flow guide cover of a centrifuge provided by an embodiment of the disclosure;

FIG. 7 is a schematic structural diagram of a flow guide cover of another centrifuge provided by an embodiment of the disclosure;

fig. 8 is a schematic structural diagram of a dome of another centrifuge provided in an embodiment of the present disclosure.

Reference numerals:

1: a housing; 11: a centrifugal chamber; 12: a motor chamber; 111: a rotor; 112: a pod; 121: a motor; 1121: a pod body; 1122: a flow deflector; 1123: the flange is turned over in a non-return way; 1221: mounting a platform; 1222: and (4) a support column.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

With reference to fig. 1 to 8, a centrifuge according to an embodiment of the present disclosure includes a casing 1, a motor 121, a rotor 111, and a wind deflector 112, where the casing 1 is configured with a centrifugal cavity 11 and a motor chamber 12, the top of the centrifugal cavity 11 is open, and the bottom of the centrifugal cavity is provided with a communication hole, and the motor chamber 12 is communicated with the centrifugal cavity 11 through the communication hole; the motor 121 is fixed in the motor chamber 12, an output shaft end of the motor 121 passes through the communicating hole and extends to the centrifugal cavity 11, and the motor 121 enables the communicating hole to form an annular vent hole; the rotor 111 is located in the centrifugal cavity 11 and fixed to the output shaft of the motor 121; the airflow guiding cover 112 is sleeved on the motor 121 and horizontally disposed between the bottom of the centrifugal cavity 11 and the rotor 111. Wherein, the air guide sleeve 112 and the bottom of the centrifugal cavity 11 form an air flow channel. In the embodiment of the present disclosure, the cross-sectional area of the motor 121 at the communicating hole at the bottom of the centrifugal chamber 11 is smaller than the area of the communicating hole, where the cross-sectional area is a cross-sectional area parallel to the plane of the bottom of the centrifugal chamber 11. Or the sectional area of the body of the motor 121 is smaller than that of the communication hole. Besides the function of penetrating the motor 121, the communication hole also forms an annular vent hole with the body of the motor 121 for exhausting air from the centrifugal cavity 11. The size of the annular vent hole, namely the distance between the motor body and the side wall of the vent hole, is different in different centrifuges, and the specific size can be obtained through limited experimental tests. In this embodiment, the casing 1 comprises a door for closing or opening the opening at the top end of the centrifugal chamber 11. An air inlet communicated with the environment where the centrifugal machine is located is arranged in the low-pressure area of the centrifugal cavity 11, so that air circulation in the centrifugal cavity 11 can be better realized. Alternatively, the air inlet can be arranged at the projection position of the shaft of the door cover motor 121, and the arrangement is simple and easy to realize. Optionally, the centrifuge includes a separately arranged air inlet pipeline, one end of which is communicated with the environment of the centrifuge, and the other end of which is located in the middle of the centrifugal cavity 11.

The motor 121 is arranged in the communicating hole in a penetrating way, so that the communicating hole forms an annular vent hole, the annular vent hole is communicated with the centrifugal cavity 11 and the motor chamber 12, and the air pressure of the motor chamber 12 is normal pressure. The air guide sleeve 112 is sleeved on the motor 121 and horizontally arranged between the bottom of the centrifugal cavity 11 and the rotor 111, and an air flow channel is formed between the air guide sleeve 112 and the bottom of the centrifugal cavity 11, so that the space in the centrifugal cavity 11 is divided into a rotor cavity located above the air guide sleeve 112 and an air flow channel formed between the air guide sleeve 112 located below the air guide sleeve 112 and the bottom of the centrifugal cavity 11 by the air guide sleeve 112. When the rotor 111 of the centrifuge rotates, the angular velocity of each part of the rotor 111 is the same, the linear velocity close to the position of the rotating shaft is smaller than the linear velocity far away from the position of the rotating shaft, and the air in the rotor cavity is thrown to the periphery of the rotor cavity under the impact of different parts of the rotor 111, so that the rotor cavity forms a state that the air around is dense and the air in the middle is thin, that is, the air pressure around the rotor cavity is larger than the air in the middle. At the same time, the rotor 111 rotates at high speed to generate impact and friction with air, and the temperature of the rotor 111 and the air in the rotor cavity is increased. The air guide sleeve 112 extends to the high-pressure area of the rotor cavity, so that the air flow channel formed by the air guide sleeve 112 and the bottom of the centrifugal cavity 11 conducts the high-pressure area of the space where the electrons are located and the annular ventilation opening, and the annular ventilation opening is communicated with the normal-pressure motor chamber 12, so that high-temperature air in the high-pressure area of the rotor cavity flows from the centrifugal cavity 11 to the motor chamber 12 under the driving of pressure difference, and is further discharged from the motor chamber 12. Meanwhile, with the discharge of air in the high-pressure area, the middle of the centrifugal cavity 11 becomes negative pressure, an air inlet communicated with the environment where the centrifugal machine is located can be arranged in the middle, and the air in the environment where the centrifugal machine is located is sucked into the centrifugal cavity 11, so that air circulation is formed. Along with the circulation of the air, the high-temperature air in the centrifuge is continuously discharged, the normal-temperature air in the environment where the centrifuge is located is continuously supplemented to the centrifugal cavity 11, the temperature in the centrifugal cavity 11 is neutralized and exchanged, and therefore the temperature is reduced, further, the temperature of the rotor 111 and the temperature of the sample arranged on the rotor 111 are also reduced, and therefore the temperature safety of the sample is guaranteed. The air guide sleeve 112 can enable air in the centrifugal cavity 11 to exchange heat under the driving of pressure difference, and the cooling of the centrifugal cavity 11 can be effectively realized in an energy-saving way under the condition of not using a refrigerating device or a wind power driving device. The design of the annular ventilation opening enables the centrifugal cavity 11 to have a larger air outlet, so that the air circulation is promoted due to the reduction of the air outlet resistance, and the noise generated when air is discharged is effectively reduced due to the increase of the air outlet, and the user experience is improved. In addition, the annular ventilation opening is located at the motor 121, and after the air entering the centrifugal cavity 11 cools the centrifugal cavity 11, the motor 121 can be cooled at the motor 121, so that the running stability of the motor 121 is effectively guaranteed.

Optionally, the air guide sleeve 112 includes an air guide sleeve body 1121 and a plurality of air guide vanes 1122, the plurality of air guide vanes 1122 are fixed to the air guide sleeve body 1121 and extend from the air guide sleeve body 1121 to the airflow channel, and the plurality of air guide vanes 1122 and the air guide sleeve body 1121 form a plurality of airflow guide slots in the airflow channel. The air guide sleeve 112 is disposed through the motor 121, and during operation of the motor 121, vibration generated by the motor 121 relative to the centrifugal chamber 11 is transmitted to the air guide sleeve 112. The flow deflectors 1122 of the shroud 112 also vibrate with respect to the centrifugal chamber 11. Therefore, the flow deflector 1122 extends from the nacelle body 1121 to the airflow path, and a vibration margin is left between the flow deflector and the bottom of the nacelle 112, so as to ensure the safety of the centrifuge operation process. The air flow guide grooves formed by the flow guide sheet 1122 and the flow guide cover body 1121 realize rectification of flowing air, reduce kinetic energy loss caused by the air in a turbulent state, and also reduce resistance of air flowing through the air flow passage. Optionally, the airflow guide grooves are a plurality of guide grooves radially radiating from the center of the air guide sleeve body 1121, and such an arrangement is simple, so that the air guide sleeve 112 is convenient to machine and form.

Alternatively, the plurality of flow deflectors 1122 have an arc shape, the plurality of air flow guide slots are vortex-shaped air flow guide slots, and the rotation direction of the plurality of air flow guide slots coincides with the rotation direction of the rotor 111. The air in the rotor cavity is not only in a dense periphery and sparse middle state under the impact of the rotor 111, but also rotates around the motor shaft under the rotation action of the rotor 111, and the rotation speed is far lower than that of the rotor. In this case, the plurality of air flow guide grooves are arranged to be a swirl air flow guide, and the swirl direction coincides with the rotation direction of the motor 121, that is, the rotation direction of the swirl air flow guide grooves coincides with the rotation direction of the high pressure zone air along the side wall of the rotor chamber. Thus, when the air in the high pressure area rotates to enter the airflow channel formed by the air guide sleeve 112 and the bottom of the centrifugal cavity 11, the turning angle of the airflow is smaller, the air in the high pressure area can enter the airflow channel more smoothly, and simultaneously, the noise generated when the air in the high pressure area flows through the annular ventilation hole is smaller.

Optionally, each of the plurality of baffles 1122 has a protrusion height in the airflow channel that gradually increases from the edge of the body toward the middle of the body. The arrangement of the baffle 1122 is wide near the edge of the air guide sleeve 112 and narrow near the middle of the air guide sleeve 112, and may be in the shape of a paddle, a triangle or a trapezoid, which can reduce the resistance when the air in the high pressure area of the rotor cavity enters the airflow channel formed by the air guide sleeve 112 and the bottom of the centrifugal cavity 11, and can make the air in the high pressure area of the rotor cavity enter the airflow channel more smoothly.

Optionally, the air guide sleeve 112 further includes a check flange 1123, the check flange 1123 is fixed to an edge of the air guide sleeve body 1121 and extends from the body to the air flow passage, and the check flange 1123 circumferentially surrounds the air guide sleeve body 1121. The stop flange forms the dome 112 into an inverted dish shape, and the check flange 1123 prevents air from the high pressure region of the rotor cavity from entering the air flow passage and then returning to the rotor cavity from the air flow passage. Specifically, on the one hand, the check bead 1123 increases the resistance of air from the airflow passage into the rotor cavity; even if air in the airflow channel forms turbulence, the air can only enter the motor chamber 12 from the annular vent hole and cannot pass through the blocking of the check flanging 1123 to enter the rotor cavity again; on the other hand, the initial velocity of air entering the air flow passage from the high pressure region of the rotor chamber is too fast and the check flange 1123 can stop it and prevent it from returning to the rotor chamber from another location. Optionally, the circumference of the end of the check flange 1123 extending to the air flow channel is smaller than the circumference of the check flange 1123 at the connection with the pod body 1121, so that the opening of the space formed by the check flange 1123 and the pod body 1121 is tightened, so that the check flange 1123 is integrally inclined from the edge of the pod 112 to the center of the pod 112, air can smoothly enter the air flow channel from the rotor cavity, when the air in the air flow channel forms a turbulent flow and flows to the check flange 1123, most of the air enters the space formed by the check flange 1123 and the pod body 1121 by the guiding action of the inclined check flange 1123 and does not return to the rotor cavity again, and thus, the check flange 1123 enables the pod 112 to achieve a better one-way guiding action.

Optionally, a side of each baffle 1122 of the plurality of baffles abuts the non-return flange 1123, and a height of a protrusion of the side of each baffle 1122 adjacent to the body edge in the airflow channel is equal to a height of a protrusion of the non-return flange 1123 in the airflow channel. In this way, the side of the plurality of baffles close to the non-return flange 1123 is flush with the non-return flange 1123, so that the resistance of the air in the rotor cavity entering the channel formed by the baffle housing 112 and the bottom of the centrifugal cavity 11 is reduced, and the air in the rotor cavity can enter the airflow channel along the non-return flange 1123 without resistance. Optionally, the pod body 1121, the non-return flange 1123, and the baffle 1122 are integrally formed, so that the baffle 1122 serves as a reinforcing rib of the non-return flange 1123 and the pod body 1121, and the overall structural strength of the pod 112 is improved.

Optionally, the centrifuge further includes a pod mounting bracket, the pod mounting bracket includes a mounting platform 1221 and a plurality of support columns 1222, the mounting platform 1221 is provided with a mounting hole, and the mounting bracket is sleeved on the motor 121 through the mounting hole and is located below the pod 112; each of the plurality of support posts 1222 has one end connected to the mounting platform 1221 and another end extending to the motor chamber 12 and bolted to the motor 121, wherein the pod 112 is secured to the mounting platform 1221. The plurality of support posts 1222 of the pod mounting bracket may be secured to the body of the motor 121, such as by welding, riveting, or bolting to the body of the motor 121 or the base of the motor 121. The pod 112 is fixed to the mounting platform 1221 so that the pod 112 is integrated with the motor 121, and relative vibration between the motor 121 and the pod 112 is reduced when the motor 121 vibrates, thereby preventing damage to the pod 112 or the motor 121. Optionally, the support post 1222 of the pod mounting bracket is adjustable in length. The different lengths of the support posts 1222 may allow the air guide sleeve 112 to be spaced from the bottom of the centrifugal chamber 11 differently, the support of the air guide sleeve 112 may allow the air guide sleeve 112 to be adapted to a centrifuge with different motors 121, thereby enhancing its adaptability, and the air guide sleeve mounting bracket with the adjustable length of the support posts 1222 may allow the ventilation capacity of the airflow channel formed by the air guide sleeve 112 and the bottom of the centrifugal chamber 11 to be adjusted, and if the air guide sleeve 112 is too far from or too close to the bottom of the centrifugal chamber 11, the distance may be changed by adjusting the length of the support of the air guide sleeve 112.

Alternatively, the pod 112 is fixed to an output shaft side end cover of the motor 121 by bolts. This arrangement is simple and easy to implement. Optionally, a rubber ring is lined between the air guide sleeve 112 and the end cover of the motor 121, so that the relative vibration between the air guide sleeve 112 and the motor 121 can be prevented from causing excessive noise or damaging the motor. Meanwhile, the distance between the air guide sleeve 112 and the end cover at the output shaft side of the motor 121 can be adjusted by changing the thickness of the rubber ring, and further, the ventilation capacity of an airflow channel formed by the air guide sleeve 112 and the bottom of the centrifugal cavity 11 is adjusted.

Optionally, the centrifuge further includes an air inlet channel configured in the casing 1, one end of the air inlet channel is communicated with the central position of the top of the centrifugal cavity 11, and the other end of the air inlet channel is communicated with the external environment of the centrifuge; and the exhaust port is arranged in the motor chamber 12 and communicated with the external environment where the motor chamber 12 and the centrifugal machine are located. When the rotor 111 of the centrifuge rotates, the rotor cavity forms a state that the air around is dense and the air in the middle is thin, namely the air pressure around the rotor cavity is higher than the air in the middle. At the same time, the rotor 111 rotates at high speed to generate impact and friction with air, and the temperature of the rotor 111 and the air in the rotor cavity is increased. The air guide sleeve 112 extends to the high-pressure area of the rotor cavity, so that the air flow channel formed by the air guide sleeve 112 and the bottom of the centrifugal cavity 11 conducts the high-pressure area of the space where the rotor is located and the annular ventilation opening, and the annular ventilation opening is communicated with the normal-pressure motor chamber 12, so that high-temperature air in the high-pressure area of the rotor cavity flows to the motor chamber 12 from the centrifugal cavity 11 under the driving of pressure difference, and is further discharged from the motor chamber 12. Meanwhile, with the discharge of air in the high-pressure area, the middle of the centrifugal cavity 11 becomes negative pressure, and the air in the environment where the centrifugal machine is located is sucked into the centrifugal cavity 11 through the air inlet channel, so that air circulation is formed. Along with the circulation of air, high-temperature air in the centrifuge is continuously discharged, normal-temperature air in the environment where the centrifuge is located is continuously supplemented to the centrifugal cavity 11, the temperature in the centrifugal cavity 11 is neutralized and exchanged, and therefore the temperature is reduced, further, the temperature of the rotor 111 and a sample arranged on the rotor is also reduced, and therefore the temperature safety of the sample is guaranteed.

Optionally, the centrifuge further includes a fan disposed at the exhaust port, and the wind guiding direction of the fan is from the motor room 12 to the environment where the centrifuge is located. In the case of no fan, the centrifuge can also circulate cold and hot air under the action of the air guide sleeve 112 to control the temperature of the rotor cavity within a desired range. The fan can be arranged to promote the better circulation of the cold and hot air in the centrifugal cavity 11. After the centrifuge rotates at a high speed, the air in the rotor cavity forms pressure difference, and the circulation of cold and hot air is realized under the driving of the pressure difference. Set up the fan and can begin to carry out air cycle in advance when rotor 111 does not rotate, improve cold and hot air exchange efficiency when rotor 111 rotates at a high speed, can start the fan and carry out better cooling to centrifugal chamber 11 when centrifuge has higher requirement to the control of temperature.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A centrifuge, comprising:

the centrifugal fan comprises a shell, a fan body and a fan blade, wherein the shell is provided with a centrifugal cavity and a motor chamber, the top of the centrifugal cavity is open, the bottom of the centrifugal cavity is provided with a communication hole, and the motor chamber is communicated with the centrifugal cavity through the communication hole;

the motor is fixed in the motor chamber, an output shaft end of the motor penetrates through the communicating hole to extend to the centrifugal cavity, and the motor enables the through hole to form an annular vent hole;

the rotor is positioned in the centrifugal cavity and is fixed on an output shaft of the motor;

a flow guide cover which is sleeved on the motor and horizontally arranged between the bottom of the centrifugal cavity and the rotor,

wherein, the air guide sleeve and the bottom of the centrifugal cavity form an airflow channel.

2. The centrifuge of claim 1, wherein the air guide sleeve comprises:

a pod body;

the guide vanes are fixed on the air guide sleeve body and extend from the air guide sleeve body to the air flow channel, and a plurality of air flow guide grooves are formed in the air flow channel by the guide vanes and the air guide sleeve body.

3. The centrifuge of claim 2,

the guide vanes are arc-shaped, the airflow guide grooves are vortex airflow guide grooves, and the rotating directions of the airflow guide grooves are consistent with the rotating direction of the rotor.

4. The centrifuge of claim 2,

the protruding height of each flow deflector in the airflow channel gradually increases from the edge of the body to the middle of the body.

5. The centrifuge of any of claims 2 to 4, wherein the air guide sleeve further comprises:

the non-return flanging is fixed on the edge of the air guide sleeve body and extends from the body to the airflow channel, and the non-return flanging is arranged around the air guide sleeve body along the circumferential direction of the body.

6. The centrifuge of claim 5,

one side of each flow deflector, which is close to the edge of the body, of each flow deflector abuts against the non-return flanging, and the protruding height of one side of each flow deflector, which is close to the edge of the body, in the airflow channel is equal to the protruding height of the non-return flanging in the airflow channel.

7. The centrifuge of claim 6, further comprising a pod mounting bracket, the pod mounting bracket comprising:

the mounting platform is sleeved on the motor and positioned below the air guide sleeve;

a plurality of support columns, one end of each support column is connected with the mounting platform, the other end of each support column extends to the motor chamber and is fixed on the motor through bolts,

wherein the pod is secured to the mounting platform.

8. The centrifuge of claim 6,

the air guide sleeve is fixed on the end cover of the output shaft side of the motor through a bolt.

9. The centrifuge of claim 7 or 8, further comprising:

the air inlet channel is constructed in the shell, one end of the air inlet channel is communicated with the centrifugal cavity, and the other end of the air inlet channel is communicated with the environment where the centrifugal machine is located;

and the exhaust port is arranged in the motor chamber and communicated with the environment where the motor chamber and the centrifugal machine are located.

10. The centrifuge of claim 9, further comprising:

and the fan is arranged at the exhaust port, and the wind guide direction of the fan is from the motor chamber to the environment where the centrifugal machine is located.

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