Vibration-absorbing structure and range hood comprising same

Abstract

The application discloses a vibration absorbing structure, a fan and an extractor hood comprising the same. The vibration absorbing structure is installed on a motor body to absorb vibration generated by the motor. The vibration absorbing structure comprises a plurality of vibration absorbing units arranged at intervals along the circumferential surface of the motor body. Each vibration absorbing unit comprises an elastic member and a counterweight. The elastic member is attached to the surface of the motor body, and the counterweight is connected to the end of the elastic member along the axial direction of the motor body. The first ratio of at least two vibration absorbing units is different, and the first ratio is the ratio of the length of the elastic member to the mass of the counterweight. The vibration absorbing structure and the fan and the extractor hood comprising the same reduce the vibration of the motor body from the source, effectively reduce the noise, effectively reduce the peak value of the multiple frequency vibration in the elastic vibration absorbing mode, avoid abnormal noise, and improve the sound experience effect.

Description

Technical Field

[0001] This invention relates to the technical field of household appliances, and particularly to a vibration-absorbing structure and a fan and range hood including the same. Background Technology

[0002] Range hood fans can generate significant vibration and noise under certain operating conditions, especially at 24th and 30th harmonic frequencies. Reducing the transmission of fan vibration to the mounting housing is one way to address this type of noise. A traditional solution is to add vibration damping pads between the fan body and the mounting housing. These pads are typically made of rubber and come in various shapes and hardnesses.

[0003] However, traditional vibration isolation pads only isolate vibrations and cannot directly reduce the vibration of the motor itself. Moreover, due to the complexity of the transmission path, some vibrations are transmitted to the rear end of the fan through the vibration isolation pads, and the vibrations are amplified. Traditional vibration isolation pad solutions cannot achieve a good noise reduction effect. Vibration isolation pads have limited effectiveness for the frequency or order of noise, and are not effective for multiple discrete vibration peak points. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of poor effect in reducing fan vibration in the prior art, and to provide a vibration absorption structure and a fan and range hood including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A vibration-absorbing structure is installed on a motor body to absorb vibrations generated by the motor. The vibration-absorbing structure includes a plurality of vibration-absorbing units spaced apart along the circumferential surface of the motor body. Each vibration-absorbing unit includes an elastic element and a counterweight. The elastic element is attached to the surface of the motor body, and the counterweight is connected to the end of the elastic element along the axial direction of the motor body. At least two of the vibration-absorbing units have a different first ratio, which is the ratio of the length of the elastic element to the mass of the counterweight.

[0007] In this solution, the vibration-absorbing structure directly absorbs the vibrations generated by the motor by attaching an elastic element to the surface of the motor body and connecting a counterweight to the end of the elastic element. This reduces the vibration of the motor body at its source, effectively reducing noise. At least two vibration-absorbing units employ different first ratios, enabling the structure to absorb at least two discrete vibrations of different frequencies. The elastic absorption effectively reduces the peak values ​​of vibrations at multiple frequencies, avoiding abnormal noise and improving the audio experience. The ratio of the length of the elastic element to the mass of the counterweight determines the vibration frequency; therefore, by adjusting the length of the elastic element and / or the mass of the counterweight, vibrations of different frequencies can be absorbed, thereby improving the absorption effect of multiple discrete frequency vibrations.

[0008] Preferably, the vibration-absorbing unit is an elastic strip, the elastic element is a flattened section of the strip, and the counterweight is a coiled section that extends along the axial direction of the flattened section and is wound into several turns; the first ratio of at least two of the strips is different.

[0009] In this design, the vibration-absorbing unit uses an elastic strip, which not only provides elasticity but also allows for flexible adjustment of the length of the flattened section and the mass of the coiled section to accommodate vibrations of different frequencies. The length of the flattened section can be adjusted by increasing or decreasing the number of turns in the coiled section, or by decreasing or increasing the overall length of the strip. Similarly, the mass of the coiled section can be adjusted by increasing or decreasing the number of turns, offering greater flexibility and adaptability.

[0010] Preferably, the plurality of said strips are divided into at least two groups of strips, and the first ratio of the strips in different groups is different; the flattened section of all said strips in the same group has the same length.

[0011] In this solution, by dividing several strips into at least two groups of strips with different first ratios, the vibration-absorbing structure can absorb vibrations of at least two different frequencies. All strips within the same group use flattened sections of the same length, making all strips of the vibration-absorbing structure have regular shapes and facilitating processing and manufacturing.

[0012] Preferably, the different groups of strips are arranged alternately.

[0013] In this scheme, different groups of rolls are alternately set up in a regular arrangement, so that the rolls of the same group are arranged in a regular order on the circumferential surface, which is conducive to absorbing vibration and reducing noise.

[0014] Preferably, the flattened sections of the strips in different groups have different lengths, while the curled sections have the same quality.

[0015] In this scheme, by using the same quality for the curled sections and different lengths for the flattened sections, the first ratio of different groups of rolls is made different.

[0016] Preferably, all the said strips have the same thickness, width, and number of turns of the said curled segment.

[0017] In this solution, the above settings result in a regular shape of the strip, which is easy to process; at the same time, the three factors (thickness, width, and number of turns) are the same, ensuring that the quality of the curled sections of different groups of strips is the same.

[0018] Preferably, all the strips have the same total length, width and thickness, and the number of turns of the curled section of the different strips is different; wherein, the total length of the strip is the sum of the length of the flattened section and the winding length of the curled section.

[0019] In this solution, the above-described configuration results in a regular shape for the strip, facilitating manufacturing. Within the same total strip length range, different initial ratios can be obtained by allocating the ratio between the length of the flattened section and the winding length of the coiled section, allowing the strip to adapt to different frequencies.

[0020] A fan includes a motor and a vibration-absorbing structure as described above, the vibration-absorbing structure being attached to the surface of the motor body.

[0021] In this solution, the fan reduces the vibration of the motor body from the source through the above-mentioned vibration absorption structure, effectively reducing noise. The elastic vibration absorption method effectively reduces the peak value of multiple frequency vibrations, avoids abnormal noise, and improves the sound experience.

[0022] Preferably, the fan further includes a fan housing, and the motor is mounted on the fan housing via vibration isolation pads.

[0023] In this solution, the fan uses the aforementioned vibration isolation pads to prevent the fan's vibration from being transmitted to the fan casing, further improving the fan's vibration reduction and noise reduction effects.

[0024] A range hood, the range hood comprising the fan as described above.

[0025] In this solution, the range hood reduces the vibration of the motor body at the source through the aforementioned fan, effectively reducing noise. The elastic vibration absorption method effectively reduces the peak value of multi-frequency vibration, avoids abnormal noise, and improves the sound experience.

[0026] The positive and progressive effects of this invention are as follows: the vibration absorption structure and the fan and range hood including it reduce the vibration of the motor body from the source through the above-mentioned vibration absorption structure, effectively reduce noise, and effectively reduce the peak value of multiple frequency vibrations by means of elastic vibration absorption, avoid abnormal noise, and improve the sound experience. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the vibration-absorbing structure of Embodiment 1 of the present invention.

[0028] Figure 2 This is a schematic diagram of the vibration absorption unit in Embodiment 1 of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the fan in Embodiment 1 of the present invention.

[0030] Figure 4 This is a schematic diagram of the range hood according to Embodiment 1 of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] Vibration Absorption Structure 1

[0033] Vibration Absorption Unit 2

[0034] Elastic element 3

[0035] Counterweight 4

[0036] Steel ring 5

[0037] Roll 6

[0038] First set of rolls, 61

[0039] Second set of rolls, 62

[0040] Flattened section 7

[0041] Curly section 8

[0042] Axial A of the motor body

[0043] Fan 9

[0044] Motor body 10

[0045] Fan casing 11

[0046] Vibration isolation pad 12

[0047] Range hood 13 Detailed Implementation

[0048] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0049] Example 1

[0050] This embodiment provides a vibration-absorbing structure 1, which is installed on the motor body 10 to absorb the vibration generated by the motor. This motor is used in the fan 9 of the range hood 13, specifically installed inside the fan housing 11. The motor drives the impeller (not shown in the figure) of the fan 9 to rotate, drawing away the smoke from the range hood 13.

[0051] like Figure 1-2 As shown, the vibration absorption structure 1 includes a plurality of vibration absorption units 2 spaced apart along the circumferential surface of the motor body 10. Each vibration absorption unit 2 includes an elastic element 3 and a counterweight 4. The elastic element 3 is attached to the surface of the motor body 10, and the counterweight 4 is connected to the end of the elastic element 3 along the axial direction of the motor body 10. At least two vibration absorption units 2 have different first ratios, which are the ratios of the length of the elastic element 3 to the mass of the counterweight 4.

[0052] Specifically, in this embodiment, the vibration-absorbing unit 2 is an elastic coil 6, which is a coil 6 made of elastic steel strip. The vibration-absorbing structure 1 includes a steel ring 5 and several coils 6 connected to the steel ring 5. The several coils 6 are spaced apart along the circumferential surface of the motor body 10. The elastic element 3 is a flattened section 7 of the coil 6, and the counterweight 4 is a coiled section 8 that extends the flattened section 7 along the axial direction of the motor body 10 and is wound into several turns. On the circumferential surface of the motor body 10, at least two coils 6 have different first ratios.

[0053] The vibration-absorbing structure 1, by attaching the elastic element 3 to the surface of the motor body 10 and connecting the counterweight 4 to the end of the elastic element 3, can directly absorb the vibration generated by the motor, reducing the vibration of the motor body 10 at its source and effectively reducing noise. At least two vibration-absorbing units 2 employ different first ratios, enabling the vibration-absorbing structure 1 to absorb at least two discrete vibrations of different frequencies. Through elastic vibration absorption, it effectively reduces the peak value of vibrations at multiple frequencies, avoiding abnormal noise and improving the sound experience. This is achieved according to the vibration frequency calculation formula. (The formula for calculating the vibration frequency is existing technology), k is the length of the elastic element 3, and m is the mass of the counterweight 4. It can be seen that the ratio of the length of the elastic element 3 to the mass of the counterweight 4 determines the vibration frequency. Therefore, by adjusting the length of the elastic element 3 and / or the mass of the counterweight 4, vibrations of different frequencies can be absorbed, thereby improving the absorption effect of multiple discrete frequency vibrations.

[0054] In other embodiments, the elastic element 3 can also be other components with elastic effects, and the counterweight 4 can also be other components of different sizes or with variable mass. For example, the counterweight 4 can be elastic spheres of different sizes attached to the end of the elastic element 3. However, unlike the vibration-absorbing unit 2 in this embodiment which uses an elastic coil 6, which not only has an elastic effect but also allows for flexible adjustment of the length of the flattened section 7 and the mass of the coiled section 8 according to the need to absorb vibrations of different frequencies, the length of the flattened section 7 can be adjusted by increasing or decreasing the number of turns of the coiled section 8, or by decreasing or increasing the overall length of the coil 6. Similarly, the mass of the coiled section 8 can be adjusted by increasing or decreasing the number of turns of the coiled section 8, resulting in better flexibility and adaptability.

[0055] In this embodiment, several coiled strips 6 are divided into at least two groups of coiled strips 6, with different first ratios between the different groups; all coiled strips 6 within the same group have the same length of flattened section 7. Specifically, in this embodiment, several coiled strips 6 in one loop are divided into two groups with unequal lengths of flattened section 7, namely the first group of coiled strips 61 and the second group of coiled strips 62. In the first group of coiled strips 61, the flattened section 7 of several coiled strips 6 has the same length but is shorter, and the coiled section 8 has more turns and a larger mass; in the second group of coiled strips 62, the flattened section 7 of several coiled strips 6 has the same length but is longer, and the coiled section 8 has fewer turns and a smaller mass, thus the two groups have different first ratios. In other embodiments, depending on the required vibration absorption frequency, all coiled strips 6 can also be divided into more groups to absorb three or more different vibration frequencies.

[0056] The vibration-absorbing structure 1 divides a plurality of coiled strips 6 into at least two groups of coiled strips 6 with different first ratios, enabling the vibration-absorbing structure 1 to absorb vibrations of at least two different frequencies. All coiled strips 6 within the same group use flattened sections 7 of the same length, making all coiled strips 6 of the vibration-absorbing structure 1 have regular shapes and are easy to process and manufacture.

[0057] In this design, different groups of coiled strips 6 are alternately arranged, specifically, the first group of coiled strips 61 and the second group of coiled strips 62 are alternately arranged. This alternating arrangement of the different groups of coiled strips 6, following a regular pattern, ensures that the coiled strips 6 of the same group are arranged in a regular sequence on the circumferential surface, which is beneficial for absorbing vibration and reducing noise. In other embodiments, depending on the required vibration absorption effect, the different groups of coiled strips 6 may not be alternately arranged. For example, depending on the specific location of the vibration source of the motor in the circumferential direction, multiple first or second groups of coiled strips 6 can be arranged continuously in certain areas.

[0058] There are several ways to form different first ratios among multiple groups of coils 6. For example, the flattened section 7 of different groups of coils 6 may have different lengths, while the mass of the coiled section 8 may be the same. In other embodiments, the flattened section 7 of all coils 6 in the circumferential direction may be the same, while the mass of the coiled section 8 may be different. In this case, the ratio between the length of the flattened section 7 and the mass of the coiled section 8 in different groups of coils 6 may also be different, which can also enable the vibration-absorbing structure 1 to absorb vibrations of different frequencies and magnitudes.

[0059] In other embodiments, to achieve the same quality, the thickness, width, and number of turns of all the coiled segments 8 in different groups of coiled segments 6 can be designed to be the same. This makes the coiled segments 6 have a regular shape and is easy to process. Having the same three factors (thickness, width, and number of turns) ensures that the quality of the coiled segments 8 in different groups of coiled segments 6 is the same. Because the flattened segments 7 of the two groups of coiled segments 6 are different in this embodiment, even if the coiled segments 8 of the two groups of coiled segments 6 have the same quality, different first ratios can still be achieved.

[0060] Since the quality of the curled segment 8 is related to the width, thickness, and number of turns of the strip 6, in other embodiments, the desired quality of the curled segment 8 can be obtained by adjusting the width, thickness, and number of turns of the strip 6.

[0061] In this embodiment, all the strips 6 have the same total length, width, and thickness. The number of turns in the curled section 8 differs between the two groups of strips 6; that is, the flattened section 7 of the first group of strips 61 is shorter, resulting in more turns in the curled section 8; while the flattened section 7 of the second group of strips 62 is longer, resulting in fewer turns in the curled section 8. However, the total length of both groups of strips 6 is the same, being the sum of the length of the flattened section 7 and the winding length of the curled section 8. This method results in a regular shape for the strips 6, facilitating manufacturing. Within the same total length range of the strips 6, different first ratios can be obtained by allocating the ratio between the length of the flattened section 7 and the winding length of the curled section 8, allowing the strips 6 to adapt to different frequencies.

[0062] When applying the vibration-absorbing structure 1 of this embodiment, the natural frequency of vibration absorption is usually determined by the peak frequency of the vibration spectrum of the range hood 13 in a certain working state. Based on the natural frequency f and the above formula, the appropriate length k of the elastic element 3 and the mass m of the counterweight 4 are selected. After determining the width, thickness, and material of the roll 6, the length of the roll 6 can be designed according to the magnitude of the vibration absorption frequency, and the roll is wound into a mass m. The length k of the flattened section 7 is determined by the remaining length.

[0063] Example 2

[0064] This embodiment provides a fan 9, such as Figure 3As shown, the fan 9 includes a motor and a vibration-absorbing structure 1 as described in Embodiment 1, which is attached to the surface of the motor body 10. Through the aforementioned vibration-absorbing structure 1, the fan 9 reduces the vibration of the motor body 10 at its source, effectively reducing noise. The elastic vibration absorption method effectively reduces the peak value of multiple frequency vibrations, avoiding abnormal noise and improving the sound experience.

[0065] Among them, such as Figure 3 As shown, the fan 9 also includes a fan housing 11, and the motor is mounted on the fan housing 11 via vibration isolation pads 12. Through the aforementioned vibration isolation pads 12, the fan 9 avoids transmitting vibrations from the fan 9 to the fan housing 11, further improving the vibration reduction and noise reduction effect of the fan 9.

[0066] Example 3

[0067] like Figure 4 As shown, this embodiment provides a range hood 13, which includes a fan 9 as in Embodiment 2. The range hood 13, through the aforementioned fan 9, reduces the vibration of the motor body 10 at the source, effectively reducing noise. It also effectively reduces the peak value of multi-frequency vibrations through elastic vibration absorption, avoiding abnormal noise and improving the sound experience.

[0068] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A vibration-absorbing structure, installed on the motor body, for absorbing vibrations generated by the motor, characterized in that, The vibration absorption structure includes a plurality of vibration absorption units spaced apart along the circumferential surface of the motor body. Each vibration absorption unit includes an elastic element and a counterweight. The elastic element is attached to the surface of the motor body, and the counterweight is connected to the end of the elastic element along the axial direction of the motor body. The vibration-absorbing unit is an elastic strip, the elastic element is the flattened section of the strip, and the counterweight is a coiled section that extends along the axial direction of the flattened section and is wound into several turns; at least two of the strips have different first ratios, and the first ratio is the ratio of the length of the flattened section to the mass of the coiled section.

2. The vibration-absorbing structure as described in claim 1, characterized in that, The plurality of said strips are divided into at least two groups of strips, and the first ratio of the strips in different groups is different; the flattened section of all said strips in the same group has the same length.

3. The vibration-absorbing structure as described in claim 2, characterized in that, The different groups of rolls are arranged alternately.

4. The vibration-absorbing structure as described in claim 2, characterized in that, Between different groups of the strips, the length of the flattened section is different, while the quality of the curled section is the same.

5. The vibration-absorbing structure as described in claim 4, characterized in that, All of the said strips have the same thickness, width, and number of turns of the said curled segment.

6. The vibration-absorbing structure as described in claim 1, characterized in that, All the strips have the same total length, width and thickness, but the number of turns of the curled section of the different strips is different; wherein, the total length of the strip is the sum of the length of the flattened section and the winding length of the curled section.

7. A fan, characterized in that, The fan includes a motor and a vibration-absorbing structure as described in any one of claims 1-6, the vibration-absorbing structure being attached to the surface of the motor body of the motor.

8. The fan as described in claim 7, characterized in that, The fan also includes a fan housing, and the motor is mounted on the fan housing via vibration isolation pads.

9. A range hood, characterized in that, The range hood includes the fan as described in claim 7 or 8.

Images