Centrifuge

Abstract

A centrifuge, comprising a housing (1), and a centrifugal chamber (2) and a fan (3) accommodated in an enclosed space defined by the housing. The housing comprises an upper cover (11), a bottom plate (12), a front shell (13), a rear plate (14), a first side plate (15), and a second side plate (16); a noise reduction layer covers the outer wall of the centrifugal chamber, and the fan is arranged between the centrifugal chamber and the rear plate; a first air inlet (151) and a first air outlet (161) are arranged relative to the fan, and under the action of the fan, air enters from the first air inlet and is discharged from the first air outlet so as to guide the direction of sound propagation. The noise reduction layer covers the outer wall of the centrifugal chamber, the fan is arranged between the centrifugal chamber and the rear plate, the first air inlet and the first air outlet are arranged relative to the fan, and air enters from the first air inlet and is discharged from the first air outlet, so that more sound in the enclosed space defined by the housing is propagated backwards and towards the first air outlet, thereby destroying the horn effect of sound present in the front of the centrifuge, and reducing the noise level.

Description

A centrifuge

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 3, 2023, with application number 202310968234.4 and invention name “A Centrifuge”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of centrifuges, and in particular to a centrifuge. Background Art

[0003] A centrifuge is an instrument used for separating biological samples and is widely used in life sciences, medicine, chemistry, environmental protection and other fields. The rotor is an important component of the centrifuge and is used to fix the test tube containing the biological sample to be centrifuged. When the rotor rotates at high speed in the centrifugal chamber, the friction with the air in the centrifugal chamber will generate a lot of heat and noise. In a centrifuge with a refrigeration system, the centrifugal chamber is a closed space, and a compressor refrigeration system or a semiconductor refrigeration module is used to freeze and cool the centrifugal chamber, resulting in a low noise level. In a centrifuge without a refrigeration system, the centrifugal chamber is a relatively open space, allowing air to enter to dissipate heat. Heat is dissipated outside the centrifugal chamber through a heat dissipation duct, resulting in a high noise level.

[0004] Existing centrifuges without refrigeration systems have a noise reduction layer covering the outer wall of the centrifugal chamber. However, the noise penetrating the noise reduction layer has an amplified horn effect in the direction of the front of the centrifuge, making the noise level still high. Technical issues

[0005] The embodiment of the present application provides a centrifuge, which aims to solve the problem of high noise level of centrifuges without a refrigeration system in the prior art. Technical Solutions

[0006] In a first aspect, a centrifuge is provided, comprising:

[0007] housing (1); and

[0008] A centrifugal chamber (2) and a fan (3) accommodated in the enclosed space of the housing (1);

[0009] The housing (1) includes an upper cover (11), a bottom plate (12), a front shell (13), a rear plate (14), a first side plate (15), and a second side plate (16); the outer wall of the centrifugal chamber (2) is covered with a noise reduction layer; and the fan (3) is arranged between the centrifugal chamber (2) and the rear plate (14);

[0010] A first air inlet (151) and a first air outlet (161) are provided relative to the fan (3); under the action of the fan (3), wind enters from the first air inlet (151) and is discharged from the first air outlet (161) to guide the direction of sound propagation. Beneficial effects

[0011] In the embodiment of the present application, a noise reduction layer is covered on the outer wall of the centrifugal chamber, a fan is arranged between the centrifugal chamber and the rear plate, and a first air inlet and a first air outlet are arranged relative to the fan. Air enters from the first air inlet and is discharged from the first air outlet, so that the sound in the space enclosed by the outer shell is transmitted more backward toward the first air outlet, thereby destroying the horn effect of the sound in the direction of the front of the centrifuge and reducing the noise level. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0013] FIG1 is a schematic diagram of a centrifuge provided in Example 1 of the present application;

[0014] FIG2 is a cross-sectional view of a centrifuge provided in Example 1 of the present application;

[0015] FIG3 is a schematic diagram of a centrifuge heat dissipation duct provided in Example 1 of the present application;

[0016] FIG4 is an exploded view of the centrifugal chamber and the noise reduction layer provided in Example 1 of the present application;

[0017] FIG5 is another exploded view of the centrifugal chamber and the noise reduction layer provided in Example 1 of the present application. Modes for Carrying Out the Invention

[0018] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0019] Centrifugation is a common and frequently performed operation in the laboratory. For biological samples that don't require precise constant temperature control, operators often choose centrifuges without refrigeration systems, which offer lower manufacturing costs. In centrifuges without refrigeration systems, the centrifuge chamber is open. When the rotor spins at high speeds, heat is dissipated through cooling ducts, and wind noise emanates from the centrifuge chamber. Due to the centrifuge's structure, a horn effect occurs from the centrifuge chamber toward the front of the centrifuge, amplifying the noise and resulting in a high noise level.

[0020] In the embodiment of the present application, a noise reduction layer is covered on the outer wall of the centrifugal chamber, a fan is arranged between the centrifugal chamber and the rear plate, and a first air inlet and a first air outlet are arranged relative to the fan. Air enters from the first air inlet and is discharged from the first air outlet, so that the sound in the space enclosed by the outer shell is transmitted more backward toward the first air outlet, thereby destroying the horn effect of the sound in the direction of the front of the centrifuge and reducing the noise level.

[0021] Example 1

[0022] Figure 1 is a schematic diagram of a centrifuge provided in Example 1 of the present application. Figure 2 is a cross-sectional view of a centrifuge provided in Example 1 of the present application. As shown in Figures 1 and 2, the centrifuge includes a housing 1, a centrifugal chamber 2, a fan 3, a rotor 4, and a motor 5.

[0023] The housing 1 comprises an upper cover 11, a bottom plate 12, a front housing 13, a rear plate 14, a first side plate 15, and a second side plate 16. The front housing 13 is located at the front of the centrifuge, facing the operator, and is equipped with a touch screen and buttons for operator interaction. The rear plate 14 is located at the rear of the centrifuge, opposite the front housing 13. The bottom plate 12 is located between the front housing 13 and the rear plate 14 and serves as the bottom of the centrifuge, carrying most of the components. The first and second side plates 15, 16 are located between the front housing 13 and the rear plate 14 and form the sides of the centrifuge. The upper cover 11 can pivot about an axis relative to the bottom plate 12, the front housing 13, the rear plate 14, the first and second side plates 15, 16. When closed, the housing 1 forms an enclosed space that houses the centrifugal chamber 2, the fan 3, the rotor 4, and the motor 5.

[0024] Since the front shell 13 is provided with a touch screen, buttons, etc., its airtightness is poorer than in other directions. In addition, for the sake of easy operation and aesthetics, the front shell 13 usually has a certain slope or arc surface, which results in a larger distance between the front shell 13 and the centrifugal chamber 2 and more space. When the noise centered on the centrifugal chamber 2 propagates toward the front shell 13, the centrifugal chamber 2 acts as the throat and the front shell 13 acts as the mouth, which easily forms a horn effect. The rear plate 14, the first side plate 15 and the second side plate 16 only need to be arranged vertically as close to the centrifugal chamber 2 as possible. The distance between these three surfaces and the centrifugal chamber 2 is relatively small, the space is small, and there is no horn effect.

[0025] In the embodiment of the present application, the upper cover 11 and the front shell 13 are made of plastic, which is easy to make an aesthetically pleasing shape. The bottom plate 12, the back plate 14, the first side plate 15 and the second side plate 16 are sheet metal and are fixed by screws or welding. In order to enhance the protection and fixation of the centrifugal chamber 2 and reduce the propagation of noise in the direction of the front shell 13, preferably, the outer shell 1 also includes a protective plate 17 arranged between the front shell 13 and the centrifugal chamber 2. The protective plate 17 is sheet metal and is arranged vertically as close to the centrifugal chamber 2 as possible. The centrifugal chamber 2 is accommodated in the enclosed space of the upper cover 11, the bottom plate 12, the protective plate 17, the back plate 14, the first side plate 15 and the second side plate 16.

[0026] The motor 5 comprises the drive unit and drive shaft. One end of the motor 5 is fixed to the base plate 12, while the other end extends through the bottom of the centrifugal chamber 2. When the rotor 4 is mounted on the motor 5, it is positioned within the centrifugal chamber 2. When the upper cover 11 is closed, a certain clearance is maintained between the top of the centrifugal chamber 2 and the upper cover 11.

[0027] In an embodiment of the present application, a second air inlet is provided at the rear end of the upper cover 11, and a second air outlet is provided around the bottom plate 12 supporting the motor 5, to form a heat dissipation duct. FIG3 is a schematic diagram of the heat dissipation duct of the centrifuge provided in Example 1 of the present application. As shown in FIG3 , air at room temperature enters from the upper cover 11 and is guided to the top of the rotor 4. When the motor 5 and the rotor 4 rotate at high speed, the air around the rotor 4 rises, and the air flows out from around the centrifugal chamber 2, and then flows downward through the motor 5 and is discharged from the second air outlet, completing the heat dissipation of the rotor 4 and the motor 5. The arrows in FIG3 show the direction of the wind flow.

[0028] In an embodiment of the present application, in order to reduce the outward radiation of noise generated by the friction between the rotor 4 and the air, a noise reduction layer is covered on the outer wall of the centrifugal chamber 2. Figure 4 is an exploded view of the centrifugal chamber and the noise reduction layer provided in Example 1 of the present application. Figure 5 is another exploded view of the centrifugal chamber and the noise reduction layer provided in Example 1 of the present application. As shown in Figures 4 and 5, the noise reduction layer includes a first layer 41 that absorbs sound and a second layer 42 that reflects sound. Preferably, the first layer 41 is arranged on the side of the second layer 42 that faces away from the outer wall of the centrifugal chamber 2, as shown in Figure 5; the second layer 42 is arranged on the side of the first layer 41 that faces away from the outer wall of the centrifugal chamber 2, as shown in Figure 4.

[0029] In this embodiment of the present application, the fan 3 is disposed between the centrifugal chamber 2 and the rear plate 14, with the first air inlet 151 and the first air outlet 161 disposed relative to the fan 3. Under the action of the fan 3, a negative pressure is formed in the space between the centrifugal chamber 2 and the rear plate 14. Air from outside the centrifuge enters through the first air inlet 151 and exits through the first air outlet 161. Some air from inside the centrifuge is also discharged through the first air outlet 161, thereby directing the direction of sound propagation. Preferably, the first air inlet 151 includes one or more micropores, and the first air outlet 161 includes one or more micropores, with shapes including but not limited to circular, elliptical, or other shapes. Excessively small micropores can result in unsmooth air flow, while oversized micropores can easily allow foreign matter to enter. A micropore diameter between 6 mm and 12 mm is suitable. Furthermore, the micropores can be arranged in one or more rows, with either a regular or irregular arrangement between the rows, to enhance noise attenuation.

[0030] As an embodiment of the present application, the first air outlet 161 is arranged on the second side panel 16 in the horizontal direction of the fan 3, and the first air inlet 151 is arranged on the first side panel 15 in the horizontal direction of the fan 3, so that the first air inlet 151, the fan 3 and the first air outlet 161 are basically or completely on the same horizontal line. Under the action of the fan 3 and the guidance of the wind, the noise centered on the centrifugal chamber 2 is more transmitted and discharged backwards toward the first air outlet 161, reducing the transmission of the noise centered on the centrifugal chamber 2 to the front shell 13. In addition, the first air inlet 151 is arranged on the first side panel 15 and the first air outlet 161 is arranged on the second side panel 16, so that the path of noise propagation is longer, which is conducive to noise attenuation. Through testing, under the same maximum operating conditions of the centrifuge, ensuring the speed and temperature rise, the noise drops by about 5dB.

[0031] As another embodiment of the present application, the first air inlet 151 can also be arranged in a vertical direction of the fan 3, that is, on the projection surface of the fan 3.

[0032] In the embodiment of the present application, a noise reduction layer is covered on the outer wall of the centrifugal chamber, a fan is arranged between the centrifugal chamber and the rear plate, and a first air inlet and a first air outlet are arranged relative to the fan. Air enters from the first air inlet and is discharged from the first air outlet, so that the sound in the space enclosed by the outer shell is propagated more backward toward the first air outlet, thereby changing the main propagation direction of the sound, destroying the horn effect of the sound in the direction in front of the centrifuge, and reducing the noise level.

[0033] Example 2

[0034] In the embodiment of the present application, the structure of the centrifuge is the same as that of the first embodiment, and the same components as those of the first embodiment use the same reference numerals as those of the first embodiment, including all the features described in the first embodiment, which will not be repeated here.

[0035] In the embodiment of the present application, some or all of the circuit components required for the centrifuge are arranged between the centrifugal chamber 2 and the rear plate 14, and the fan 3 can reduce noise while also dissipating heat from the circuit components.

[0036] In this embodiment of the present application, sound-absorbing cotton is provided between the rear panel 14 and the first side panel 15, and between the rear panel 14 and the second side panel 16. Sound-absorbing cotton can also be provided in the gaps between the upper cover 11, the bottom panel 12, the front shell 13, the rear panel 14, the first side panel 15, the second side panel 16, and the protective panel 17.

[0037] In the embodiment of the present application, a noise reduction layer is covered on the outer wall of the centrifugal chamber, a fan is arranged between the centrifugal chamber and the rear plate, and a first air inlet and a first air outlet are arranged relative to the fan. Air enters from the first air inlet and is discharged from the first air outlet, so that the sound in the space enclosed by the outer shell is transmitted more backward toward the first air outlet, thereby destroying the horn effect of the sound in the direction of the front of the centrifuge and reducing the noise level.

[0038] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A centrifuge, characterized in that: include: Housing (1); as well as A centrifugal chamber (2) and a fan (3) accommodated in the space enclosed by the housing (1); The housing (1) comprises an upper cover (11), a bottom plate (12), a front shell (13), a rear plate (14), a first side plate (15) and a second side plate (16); the outer wall of the centrifugal chamber (2) is covered with a noise reduction layer; and the fan (3) is arranged between the centrifugal chamber (2) and the rear plate (14); Wherein, a first air inlet (151) and a first air outlet (161) are arranged relative to the fan (3); under the action of the fan (3), wind enters from the first air inlet (151) and is discharged from the first air outlet (161) to guide the direction of sound propagation.

2. The centrifuge according to claim 1, characterized in that It also comprises a heat dissipation duct in which a second air inlet is arranged on the upper cover (11) and a second air outlet is arranged on the bottom plate (12).

3. The centrifuge according to claim 1, characterized in that The noise reduction layer comprises a first layer (41) for absorbing sound and a second layer (42) for reflecting sound.

4. The centrifuge according to claim 3, characterized in that The first layer (41) is arranged on a side of the second layer (42) facing away from the outer wall of the centrifugal chamber (2); or The second layer (42) is arranged on a side of the first layer (41) facing away from the outer wall of the centrifugal chamber (2).

5. The centrifuge according to claim 1, characterized in that: The first air outlet (161) is arranged on the second side plate (16) in the horizontal direction of the fan (3); The first air inlet (151) is arranged on the first side plate (15) in the horizontal direction of the fan (3), and / or the first air inlet (151) is arranged in the vertical direction of the fan (3).

6. The centrifuge according to claim 5, characterized in that The first air inlet (151) includes one or more holes, and the first air outlet (161) includes one or more holes.

7. The centrifuge according to claim 1, characterized in that The upper cover (11) and the front shell (13) are made of plastic material, and the bottom plate (12), the rear plate (14), the first side plate (15) and the second side plate (16) are made of sheet metal.

8. The centrifuge according to claim 7, characterized in that The housing (1) further comprises a protective plate (17) arranged between the front housing (13) and the centrifugal chamber (2); the protective plate (17) is made of sheet metal, and the centrifugal chamber (2) is accommodated in an enclosed space of the upper cover (11), the bottom plate (12), the protective plate (17), the rear plate (14), the first side plate (15) and the second side plate (16).

9. The centrifuge according to claim 1, characterized in that: Sound-absorbing cotton is arranged between the rear panel (14) and the first side panel (15), and between the rear panel (14) and the second side panel (16).

10. The centrifuge according to any one of claims 1 to 9, characterized in that: It also includes circuit components arranged between the centrifugal chamber (2) and the rear plate (14).

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