Vibration reduction processing method, vibration reduction processing system, and range hood

Abstract

The present application relates to a kind of vibration reduction processing method, vibration reduction processing system and range hood, by obtaining the motor vibration acceleration value of motor body and the vibration acceleration value of each motor installation positioning hole on motor mounting bracket when range hood operates stably, vibration transmission coefficient under the current speed state of motor is obtained, when the motor body vibration acceleration value is less than the preset vibration acceleration threshold value corresponding to the current speed state of motor, motor speed is unchanged, otherwise, adjust motor operating voltage to make motor body vibration acceleration value less than the preset vibration acceleration threshold value, and when all vibration transmission coefficients are greater than the respective preset vibration transmission coefficient threshold value corresponding to the current speed of motor, it is judged that the vibration isolation effect of vibration isolation structure is normal;Otherwise, it is judged that the vibration isolation effect of vibration isolation structure is abnormal, to realize accurate judgment to the vibration isolation effect of vibration isolation structure, and corresponding measures are taken based on the judgment of the vibration isolation effect of vibration isolation structure, to eliminate abnormal sound.

Description

Technical Field

[0001] This invention relates to the field of range hoods, and more particularly to a vibration reduction method, a vibration reduction system, and a range hood. Background Technology

[0002] A range hood, also known as a cooking hood, is installed above the kitchen stove to quickly remove harmful cooking fumes and exhaust them outdoors. As people's living standards continue to improve, range hoods have become an indispensable household appliance in the kitchen.

[0003] The range hood contains a fan system, which includes a volute, a motor, and an impeller. The volute is mounted to the top and rear panel via a mounting bracket, and the volute also has a motor mounting bracket with mounting holes. The motor is mounted to the bracket using screws passing through these holes. The impeller is mounted on the motor shaft. The motor drives the impeller to rotate, creating negative pressure to draw away the cooking fumes. As airflow increases, the demands on the fume extraction efficiency of range hoods also rise. This leads to further improvements in motor performance. Under increased load, the motor's vibration can change abruptly due to the dynamic imbalance caused by the load, transmitting to the volute and the entire unit, resulting in abnormal noise.

[0004] To avoid abnormal noise caused by sudden changes in motor vibration, an elastic rubber structure is usually fixed between the motor and the motor mounting bracket using screws as a vibration isolation structure. This vibration isolation structure achieves a vibration reduction effect, thereby eliminating abnormal noise caused by sudden changes in motor vibration.

[0005] However, current vibration reduction solutions for the fan system inside range hoods are inadequate: if the vibration isolation structure is not designed properly, the motor vibration will be transmitted to the motor mounting bracket, volute and even the whole machine, causing the vibration to be continuously amplified and producing abnormal noise; in addition, sudden changes in motor vibration will also cause the vibration transmitted to the volute and other rear panels of the whole machine to exceed the standard, resulting in abnormal noise. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a vibration reduction method that can accurately judge the vibration isolation effect of the vibration isolation structure, in contrast to the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a vibration reduction system for implementing the vibration reduction method.

[0008] The third technical problem to be solved by the present invention is to provide a range hood that applies the above-mentioned vibration reduction system.

[0009] The technical solution adopted by this invention to solve the first technical problem is: a vibration reduction method, applicable to range hoods with a vibration isolation structure fixed between the motor and the motor mounting bracket, characterized in that the vibration reduction method includes:

[0010] Step 1: Obtain the current speed of the motor when the range hood is running stably, and the vibration acceleration value of the motor body at that current speed.

[0011] Step 2: Obtain the vibration acceleration value of each motor mounting positioning hole on the motor mounting bracket at the current motor speed.

[0012] Step 3: Based on the obtained vibration acceleration values ​​of the motor body and each positioning hole, calculate the vibration transmission coefficient of each motor mounting positioning hole under the current motor speed.

[0013] Step 4: Determine whether the obtained vibration acceleration value of the motor body is less than the preset vibration acceleration threshold corresponding to the current motor speed state.

[0014] When the vibration acceleration value of the motor body is less than the corresponding preset vibration acceleration threshold, the current speed of the motor is maintained; otherwise, the working voltage of the motor at the current speed is adjusted until the vibration acceleration value of the motor body after the working voltage adjustment is less than the preset vibration acceleration threshold corresponding to the current speed of the motor, and then proceed to step 5.

[0015] Step 5: Compare the vibration transmission coefficients of each motor mounting and positioning hole with their respective preset vibration transmission coefficient thresholds.

[0016] When all vibration transmission coefficients are greater than their respective preset vibration transmission coefficient thresholds, the vibration isolation effect of the vibration isolation structure is determined to be normal; otherwise, the vibration isolation effect of the vibration isolation structure is determined to be abnormal. Among them, each motor mounting positioning hole has a preset vibration transmission coefficient threshold for each motor speed state.

[0017] Improved, in the vibration reduction treatment method, when it is determined that the vibration isolation effect of the vibration isolation structure is abnormal, a handling operation corresponding to the abnormal vibration isolation effect is performed.

[0018] Furthermore, in the vibration reduction treatment method, the handling operation corresponding to abnormal vibration isolation effect includes the following steps:

[0019] Step a1: Select the motor mounting positioning holes whose vibration transmission coefficient obtained under the current speed state is not greater than their respective preset vibration transmission coefficient threshold, and take each selected motor mounting positioning hole as the target positioning hole.

[0020] Step a2: Under the current rotational speed, obtain the vibration acceleration value of any target positioning hole for a preset number of times;

[0021] Step a3: Under the current rotational speed, obtain the vibration acceleration value of the motor body for a preset number of times;

[0022] Step a4: Calculate the average vibration acceleration of the positioning hole and the average vibration acceleration of the motor body in the preset number of times for any target positioning hole;

[0023] Step a5: Based on the calculated average vibration acceleration of any target positioning hole and the average vibration acceleration of the motor body, calculate the vibration transmission coefficient of any target positioning hole under the current motor speed.

[0024] Step a6: Compare the calculated vibration transmission coefficient of any target positioning hole at the current motor speed with the preset vibration transmission coefficient threshold corresponding to the target positioning hole at the current speed.

[0025] When the vibration transmission coefficient is greater than the preset vibration transmission coefficient threshold, a prompt will be made to replace the vibration isolation structure corresponding to any target positioning hole position; otherwise, no prompt will be made to replace the vibration isolation structure corresponding to any target positioning hole position.

[0026] Alternatively, in the vibration reduction method, the current speed state is the current speed value of the motor or / and the speed range corresponding to the current speed value of the motor.

[0027] In a further improvement, in the vibration reduction method, in step 4, the adjustment of the operating voltage of the motor at the current speed is changed to a reduction in the operating voltage.

[0028] In a further improvement, in the vibration reduction treatment method, step 3 and step a5 use the same method to calculate the vibration transmission coefficient.

[0029] Furthermore, in the vibration reduction method, the vibration transmission coefficient at any motor speed is calculated as follows:

[0030]

[0031] Where P is the vibration transmission coefficient at any speed of the motor, and V a V represents the vibration acceleration value of the motor body at any motor speed. b V represents the vibration acceleration value of the motor mounting positioning hole at any motor speed. b >0.

[0032] The technical solution adopted by the present invention to solve the second technical problem is: a vibration reduction system for implementing the vibration reduction method, characterized in that it includes:

[0033] The motor speed acquisition device shall at least acquire the motor speed status when the range hood is running stably;

[0034] The motor vibration acceleration acquisition device collects the vibration acceleration value of the motor body at the corresponding speed state when the range hood is running stably;

[0035] At least one positioning hole vibration acceleration acquisition device is provided to acquire the vibration acceleration value of the corresponding motor mounting positioning hole on the motor mounting bracket at the corresponding speed state when the range hood is running stably;

[0036] The processor is connected to the motor speed acquisition device, the motor vibration acceleration acquisition device, and the vibration acceleration acquisition devices of each positioning hole, respectively. It processes the motor speed status acquired by the motor speed acquisition device, the vibration acceleration value acquired by the motor vibration acceleration acquisition device, and the vibration acceleration value acquired by each positioning hole vibration acceleration acquisition device, and determines whether the vibration isolation effect of the vibration isolation structure is normal or abnormal.

[0037] Furthermore, in this invention, the vibration reduction system also includes a vibration isolation structure replacement reminder device, which is connected to the processor.

[0038] The technical solution adopted by the present invention to solve the third technical problem is: a range hood, characterized in that it applies any of the vibration reduction treatment systems described in the present invention.

[0039] Compared with the prior art, the advantages of the present invention are as follows: The vibration reduction method of the present invention obtains the vibration acceleration value of the motor body at the current speed state corresponding to the stable operation of the range hood and the vibration acceleration value of each motor mounting positioning hole on the motor mounting bracket, thereby obtaining the vibration transmission coefficient at the current motor speed state. When the vibration acceleration value of the motor body is less than the preset vibration acceleration threshold corresponding to the current motor speed state, the motor speed is kept constant; otherwise, the operating voltage of the motor is adjusted so that the vibration acceleration value of the motor body is less than the preset vibration acceleration threshold. When all vibration transmission coefficients are greater than their respective preset vibration transmission coefficient thresholds at the current motor speed, the vibration isolation effect of the vibration isolation structure is determined to be normal; otherwise, the vibration isolation effect of the vibration isolation structure is determined to be abnormal, thereby achieving an accurate judgment on the vibration isolation effect of the vibration isolation structure.

[0040] Secondly, when the vibration reduction method of this invention accurately determines that the vibration isolation effect of the vibration isolation structure is abnormal, it prompts the replacement of the vibration isolation structure corresponding to the target positioning hole position, so as to eliminate the abnormal noise. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the vibration reduction treatment method in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the vibration reduction system in an embodiment of the present invention. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] This embodiment provides a vibration reduction method applicable to range hoods where a vibration isolation structure is fixed between the motor and the motor mounting bracket. Specifically, see... Figure 1 As shown, the vibration reduction method of this embodiment includes the following steps:

[0045] Step 1: Obtain the current speed state of the motor when the range hood is running stably, and the vibration acceleration value of the motor body at that current speed state; wherein, the current speed state here can be a speed range or a specific speed value; in this embodiment, it is assumed that the vibration acceleration value of the motor body at that current speed state is denoted as V. a ;

[0046] Step 2: Obtain the vibration acceleration value of each motor mounting positioning hole on the motor mounting bracket at the current motor speed; where, it is assumed that the vibration acceleration value of any motor mounting positioning hole at the current motor speed is V. b ;

[0047] Step 3: Based on the obtained vibration acceleration values ​​of the motor body and each positioning hole, calculate the vibration transmission coefficient of each motor mounting positioning hole at the current motor speed. For example, in this embodiment, the vibration transmission coefficient of any motor mounting positioning hole at the current motor speed is calculated as follows:

[0048]

[0049] Where P is the vibration transmission coefficient of the motor mounting hole at the current motor speed, and V a V represents the vibration acceleration value of the motor body at the current speed. b V represents the vibration acceleration value of the positioning hole for any motor mounting positioning hole at the current motor speed. b >0; Of course, if the motor mounting positioning hole is changed, the corresponding positioning hole vibration acceleration value will also change;

[0050] Assume the motor mounting bracket has N motor mounting holes, and the vibration acceleration value of the nth motor mounting hole at the current motor speed is denoted as V. b,n If 1 ≤ n ≤ N, then the vibration transmission coefficient of the nth motor mounting hole at the current motor speed is denoted as P. n ;in:

[0051]

[0052] Step 4: Determine whether the obtained vibration acceleration value of the motor body is less than the preset vibration acceleration threshold corresponding to the current motor speed state.

[0053] When the vibration acceleration value of the motor body is less than the corresponding preset vibration acceleration threshold, it means that the current vibration acceleration of the motor body is within the allowable vibration acceleration range, and the current speed of the motor is maintained; otherwise, it means that the current vibration acceleration of the motor body exceeds the allowable vibration acceleration range, and the operating voltage of the motor at the current speed is adjusted until the vibration acceleration value of the motor body after the operating voltage adjustment is less than the preset vibration acceleration threshold corresponding to the current speed of the motor, and then proceed to step 5; wherein, after adjusting the operating voltage of the motor, for example, here the adjustment is to reduce the operating voltage of the motor, it is necessary to re-acquire the vibration acceleration value of the motor body, so as to compare the newly acquired vibration acceleration value of the motor body with the previously existing preset vibration acceleration threshold for judgment;

[0054] Step 5: Compare the vibration transmission coefficients of each motor mounting and positioning hole with their respective preset vibration transmission coefficient thresholds.

[0055] When all vibration transmission coefficients are greater than their respective preset vibration transmission coefficient thresholds, the vibration isolation effect of the vibration isolation structure is determined to be normal; otherwise, the vibration isolation effect of the vibration isolation structure is determined to be abnormal. Each motor mounting hole corresponds to a preset vibration transmission coefficient threshold at each motor speed. For example:

[0056] For motor mounting hole 1, its vibration transmission coefficient at the current motor speed R1 is P. 1,R1 The preset vibration transmission coefficient threshold corresponding to the motor mounting positioning hole 1 at the current motor speed R1 is marked as P. 1,R1,th ;

[0057] For motor mounting hole 1, its vibration transmission coefficient at motor speed R2 is P. 1,R2 The preset vibration transmission coefficient threshold corresponding to the motor mounting positioning hole 1 at the motor speed R2 is marked as P. 1,R2,th ;

[0058] For the motor mounting hole m, its vibration transmission coefficient at the current motor speed R1 is P. m,R1 The preset vibration transmission coefficient threshold corresponding to the motor mounting positioning hole m at the current motor speed R1 is marked as P. m,R1,th ;2≤m≤N;

[0059] The same logic applies to the others, and will not be elaborated upon here.

[0060] In order to respond promptly to the vibration isolation effect of the vibration isolation structure, in the vibration reduction method of this embodiment, when it is determined that the vibration isolation effect of the vibration isolation structure is abnormal, a corresponding handling operation is performed. Specifically, the handling operation corresponding to the abnormal vibration isolation effect in this embodiment includes the following steps:

[0061] Step a1: Select the motor mounting positioning holes whose vibration transmission coefficient obtained under the current speed state is not greater than their respective preset vibration transmission coefficient threshold, and take each selected motor mounting positioning hole as the target positioning hole.

[0062] Step a2: Under the current rotational speed, obtain the vibration acceleration value of any target positioning hole for a preset number of times;

[0063] Step a3: Under the current rotational speed, obtain the vibration acceleration value of the motor body for a preset number of times;

[0064] Step a4: Calculate the average vibration acceleration of the positioning hole and the average vibration acceleration of the motor body in the preset number of times for any target positioning hole;

[0065] Step a5: Based on the calculated average vibration acceleration of any target positioning hole and the average vibration acceleration of the motor body, calculate the vibration transmission coefficient of any target positioning hole under the current motor speed.

[0066] For example, suppose that, after calculation, the average vibration acceleration of any target positioning hole in the preset number of times is denoted as... The average vibration acceleration of the motor body during this preset number of cycles is marked as follows: The vibration transmission coefficient of any target positioning hole under the current motor speed is denoted as P':

[0067]

[0068] Step a6: Compare the calculated vibration transmission coefficient of any target positioning hole at the current motor speed with the preset vibration transmission coefficient threshold corresponding to the target positioning hole at the current speed.

[0069] When the vibration transmission coefficient is greater than the preset vibration transmission coefficient threshold, a prompt will be made to replace the vibration isolation structure corresponding to any target positioning hole position; otherwise, no prompt will be made to replace the vibration isolation structure corresponding to any target positioning hole position.

[0070] This embodiment provides a vibration reduction system for implementing the above-described vibration reduction method. Specifically, see [link to documentation]. Figure 2 As shown, the vibration reduction system includes:

[0071] The motor speed acquisition device 1 acquires at least the motor speed status when the range hood is running stably;

[0072] Motor vibration acceleration acquisition device 2, acquires the vibration acceleration value of the motor body at the corresponding speed state when the range hood is running stably;

[0073] Multiple positioning hole vibration acceleration acquisition devices 3, each positioning hole vibration acceleration acquisition device 3 acquires the vibration acceleration value of the corresponding motor mounting positioning hole on the motor mounting bracket at the corresponding speed state when the range hood is running stably;

[0074] The processor 4 is connected to the motor speed acquisition device 1, the motor vibration acceleration acquisition device 2, and the vibration acceleration acquisition device 3 of each positioning hole, respectively. It processes the motor speed status acquired by the motor speed acquisition device 1, the vibration acceleration value acquired by the motor vibration acceleration acquisition device 2, and the vibration acceleration value acquired by each positioning hole vibration acceleration acquisition device 3, and determines whether the vibration isolation effect of the vibration isolation structure is normal or abnormal.

[0075] In addition, there is a vibration isolation structure replacement prompting device 5, which is connected to the processor 4. The vibration isolation structure replacement prompting device 5 is used to prompt the replacement of the vibration isolation structure corresponding to the target positioning hole position based on the abnormal judgment result of the processor 4 on the vibration isolation effect of the vibration isolation structure.

[0076] This embodiment also provides a range hood. The range hood includes a motor, a motor mounting bracket, and a vibration isolation structure fixed between the motor and the mounting bracket. The motor mounting bracket has motor mounting positioning holes required for fixing the motor. The range hood utilizes the aforementioned vibration reduction system.

[0077] Although preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vibration reduction method, applicable to range hoods where a vibration isolation structure is fixed between the motor and the motor mounting bracket, characterized in that, The vibration reduction method includes: Step 1: Obtain the current speed of the motor when the range hood is running stably, and the vibration acceleration value of the motor body at that current speed. Step 2: Obtain the vibration acceleration value of each motor mounting positioning hole on the motor mounting bracket at the current motor speed. Step 3: Based on the obtained vibration acceleration values ​​of the motor body and each positioning hole, calculate the vibration transmission coefficient of each motor mounting positioning hole under the current motor speed. Step 4: Determine whether the obtained vibration acceleration value of the motor body is less than the preset vibration acceleration threshold corresponding to the current motor speed state. When the vibration acceleration value of the motor body is less than the corresponding preset vibration acceleration threshold, the current speed of the motor is maintained; otherwise, the working voltage of the motor at the current speed is adjusted until the vibration acceleration value of the motor body after the working voltage adjustment is less than the preset vibration acceleration threshold corresponding to the current speed of the motor, and then proceed to step 5. Step 5: Compare the vibration transmission coefficients of each motor mounting and positioning hole with their respective preset vibration transmission coefficient thresholds. When all vibration transmission coefficients are greater than their respective preset vibration transmission coefficient thresholds, the vibration isolation effect of the vibration isolation structure is determined to be normal; otherwise, the vibration isolation effect of the vibration isolation structure is determined to be abnormal. Among them, each motor mounting positioning hole has a preset vibration transmission coefficient threshold for each motor speed state.

2. The vibration reduction method according to claim 1, characterized in that, Also includes: When it is determined that the vibration isolation effect of the vibration isolation structure is abnormal, the corresponding handling operation is performed.

3. The vibration reduction method according to claim 2, characterized in that, The handling procedures corresponding to abnormal vibration isolation effect include the following steps: Step a1: Select the motor mounting positioning holes whose vibration transmission coefficient obtained under the current speed state is not greater than their respective preset vibration transmission coefficient threshold, and take each selected motor mounting positioning hole as the target positioning hole. Step a2: Under the current rotational speed, obtain the vibration acceleration value of any target positioning hole for a preset number of times; Step a3: Under the current rotational speed, obtain the vibration acceleration value of the motor body for a preset number of times; Step a4: Calculate the average vibration acceleration of the positioning hole and the average vibration acceleration of the motor body in the preset number of times for any target positioning hole; Step a5: Based on the calculated average vibration acceleration of any target positioning hole and the average vibration acceleration of the motor body, calculate the vibration transmission coefficient of any target positioning hole under the current motor speed. Step a6: Compare the calculated vibration transmission coefficient of any target positioning hole at the current motor speed with the preset vibration transmission coefficient threshold corresponding to the target positioning hole at the current speed. When the vibration transmission coefficient is greater than the preset vibration transmission coefficient threshold, a prompt will be made to replace the vibration isolation structure corresponding to any target positioning hole position; otherwise, no prompt will be made to replace the vibration isolation structure corresponding to any target positioning hole position.

4. The vibration reduction method according to claim 1, characterized in that, The current speed state refers to the current motor speed value and / or the speed range corresponding to the current motor speed value.

5. The vibration reduction method according to claim 1, characterized in that, In step 4, adjusting the operating voltage of the motor at the current speed is to reduce the operating voltage.

6. The vibration reduction method according to claim 3, characterized in that, Step 3 and step a5 use the same method to calculate the vibration transmission coefficient.

7. The vibration reduction method according to claim 6, characterized in that, The vibration transmission coefficient at any motor speed is calculated as follows: Where P is the vibration transmission coefficient at any speed of the motor, and V a V represents the vibration acceleration value of the motor body at any motor speed. b V represents the vibration acceleration value of the motor mounting positioning hole at any motor speed. b >0.

8. A vibration reduction system for implementing the vibration reduction method of claim 1, characterized in that, include: The motor speed acquisition device (1) acquires at least the motor speed state corresponding to the stable operation of the range hood; Motor vibration acceleration acquisition device (2) acquires the vibration acceleration value of the motor body at the corresponding speed state when the range hood is running stably; At least one positioning hole vibration acceleration acquisition device (3) is used to acquire the vibration acceleration value of the corresponding motor mounting positioning hole on the motor mounting bracket at the corresponding speed state when the range hood is running stably; The processor (4) is connected to the motor speed acquisition device (1), the motor vibration acceleration acquisition device (2) and the vibration acceleration acquisition device (3) of each positioning hole respectively. It processes the motor speed status acquired by the motor speed acquisition device (1), the vibration acceleration value acquired by the motor vibration acceleration acquisition device (2) and the vibration acceleration value acquired by each positioning hole vibration acceleration acquisition device (3) to determine whether the vibration isolation effect of the vibration isolation structure is normal or abnormal.

9. The vibration reduction system according to claim 8, characterized in that, It also includes a vibration isolation structure replacement reminder device (5), which is connected to the processor (4).

10. A range hood, characterized in that, The vibration reduction system described in claim 8 or 9 is applied.

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