Methods for analyzing and handling abnormal noise from fume extraction devices, related media, and integrated stoves

Abstract

This invention relates to a method, medium, and integrated stove for analyzing and processing abnormal noise in a range hood. By collecting the current rotational speed and sound pressure signal at the air inlet during stable operation of the range hood, abnormal noise signals, peak amplitude values, and frequency values ​​at the air inlet are obtained. When the vibration amplitude of the motor body meets a first preset condition, the vibration amplitude and frequency values ​​of each preset vibration transmission path are acquired. When the vibration frequency of the motor body, the frequency values ​​of each preset vibration transmission path, and the abnormal noise frequency values ​​meet a second preset condition, candidate vibration transmission paths that meet the requirements are selected. If the difference in vibration amplitude between the candidate vibration transmission path and the motor body meets a preset resonance condition, the contribution of each candidate vibration transmission path to the abnormal noise signal is calculated. The vibration transmission path that contributes to the abnormal noise signal is selected, thus enabling the determination of the main areas generating abnormal noise within the range hood.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliances, and more particularly to a method for analyzing and processing abnormal noise in a fume extraction device, a medium, and an integrated stove. Background Technology

[0002] Range hoods are a common kitchen appliance that removes cooking fumes and purifies the air. As people's needs for kitchen appliances have increased, integrated cooktops (also known as eco-friendly cooktops or integrated eco-friendly cooktops) that combine the functions of a range hood, gas stove, disinfection cabinet, and storage cabinet have emerged. Integrated cooktops offer advantages such as space saving, effective fume extraction, energy efficiency, and environmental friendliness, making them increasingly popular among users.

[0003] Due to the spatial constraints of integrated cooktops, the dimensions of the range hood fan, the ductwork housing the fan, and the disinfection cabinet are mutually restrictive. To ensure the airflow and fume extraction effect of the integrated cooktop's range hood, the motor selection is generally a combination of AC and DC motors. This requires the fan to be compatible with different types of motors. Consequently, the range hood is prone to excessive structural vibration due to variations in motor excitation under different motor types, leading to abnormal noise.

[0004] Chinese invention patent application CN114992678A discloses a low-noise integrated range hood and cooktop, comprising a cooktop and a fume extraction assembly. The fume extraction assembly includes a fume extraction head and a volute connected to the fume extraction head to provide power for fume extraction. An impeller and a motor for driving the impeller to rotate and generate the power for fume extraction are disposed within the volute. An air inlet is provided at the top of the volute, corresponding to the impeller. An air inlet box is disposed above the air inlet, connected to the fume extraction head to receive fumes. The air inlet box is also connected to the air inlet at the top of the volute to guide fumes into the volute. The air inlet box extends laterally to below the cooktop. By extending the air inlet box laterally below the cooktop, the space around the cooktop is utilized, increasing the volume of the air inlet box, thereby increasing the air intake and simultaneously reducing noise.

[0005] However, the low-noise integrated range hood and stove disclosed in patent application CN114992678A has shortcomings: it cannot accurately determine the main areas where noise is generated within the fume extraction component, making it difficult to take countermeasures to eliminate the noise of the fume extraction component to the greatest extent. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a method for analyzing and processing abnormal noise in a fume extraction device, in contrast to the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a readable storage medium. This readable storage medium stores a computer program, which, when executed by a processor, implements the noise analysis and processing method for the fume extraction device described in any one of the claims.

[0008] The third technical problem to be solved by the present invention is to provide an integrated stove. The integrated stove includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the noise analysis and processing method for the fume extraction device described in any one of the claims.

[0009] The technical solution adopted by this invention to solve the first technical problem is: a method for analyzing and processing abnormal noise in a fume extraction device, characterized in that it includes:

[0010] Step 1: Collect the current speed of the fume extraction device and the sound pressure signal at its air inlet when it is running smoothly at the user-selected setting;

[0011] Step 2: Process the collected sound pressure signal at the air inlet to obtain the abnormal sound signal at the air inlet, and extract the peak value of the abnormal sound amplitude and the abnormal sound frequency value corresponding to the peak value of the abnormal sound amplitude.

[0012] Step 3: Obtain the vibration amplitude value and corresponding vibration frequency value of the motor body inside the current state of the range hood, and make a judgment based on the obtained vibration amplitude value of the motor body:

[0013] When the vibration amplitude of the motor body meets the first preset condition, proceed to step 4; otherwise, implement measures corresponding to the abnormal motor vibration excitation.

[0014] Step 4: Obtain the vibration amplitude and corresponding frequency values ​​of each preset vibration transmission path of the fume extraction device;

[0015] Step 5: Compare the obtained motor body vibration frequency value and the frequency values ​​of each preset vibration transmission path with the extracted abnormal sound frequencies.

[0016] If the three frequency values ​​meet the second preset condition, proceed to step 6; otherwise, proceed to step 1.

[0017] Step 6: Each preset vibration transmission path whose vibration amplitude value is greater than the obtained vibration amplitude value of the motor body is selected as a candidate vibration transmission path.

[0018] Step 7: Obtain the vibration amplitude difference between the vibration amplitude value of each candidate vibration transmission path and the vibration amplitude value of the motor body, and perform judgment processing on the obtained vibration amplitude difference:

[0019] If any vibration amplitude difference meets the preset resonance condition, proceed to step 8; otherwise, determine that the abnormal sound signal is caused by poor airflow.

[0020] Step 8: Calculate the contribution of each candidate vibration transmission path to the abnormal noise signal at the current rotational speed.

[0021] Step 9: Select candidate vibration transmission paths whose vibration transmission path contribution is greater than the preset vibration transmission path contribution threshold, and determine all selected candidate vibration transmission paths as vibration transmission paths that contribute to the abnormal sound signal.

[0022] Improvedly, in the method for analyzing and processing abnormal noise of the fume extraction device, the first preset condition is: the vibration amplitude value of the motor body is less than a preset vibration amplitude threshold.

[0023] In a further improvement, the second preset condition in the method for analyzing and processing abnormal noise in the fume extraction device is that the vibration frequency of the motor body and the frequency of each preset vibration transmission path are the same as the abnormal noise frequency.

[0024] Improvedly, in the method for analyzing and processing abnormal noise of the fume extraction device, the preset resonance condition is: the absolute value of the difference between the vibration amplitude difference and the preset vibration amplitude difference threshold is less than a preset multiple of the preset vibration amplitude difference threshold; wherein, the preset multiple is less than 1.

[0025] Further improvements are made to the noise analysis and processing method for the fume extraction device. In step 4, the vibration amplitude values ​​of the preset vibration transmission paths at each stage are calculated as follows:

[0026]

[0027] Where r is the current rotation speed corresponding to the stable operation of the fume extraction device, and A n (r) represents the nth preset vibration transmission path L on the fume extraction device at rotational speed r. j The vibration amplitude value, N is the total number of preset vibration transmission paths in the fume extraction device, I is the total number of connection points on the nth preset vibration transmission path, f n,i (r) is the vibration frequency at connection point i of the nth stage preset vibration transmission path on the fume extraction device at rotational speed r, X n,i (r) represents the vibration displacement at connection point i of the nth stage preset vibration transmission path on the fume extraction device at a rotational speed r.

[0028] Improvedly, in the above method for analyzing and processing abnormal noise in the fume extraction device, in step 8, the contribution of the candidate vibration transmission path to the abnormal noise signal at the current rotational speed is calculated as follows:

[0029]

[0030]

[0031] in, For the j-th alternative vibration transmission path L among all alternative vibration transmission paths j The contribution of vibration transmission paths to abnormal sound signals, where J is the total number of alternative vibration transmission path levels, and R... j (r) is the transfer function of the j-th level alternative vibration transmission path, F j F represents the pressure exerted on the j-th alternative vibration transmission path. j-1 The pressure output for the j-1th level alternative vibration transmission path.

[0032] In a further improvement, the method for analyzing and processing abnormal noise in the fume extraction device includes a three-level preset vibration transmission path. The first-level preset vibration transmission path is the transmission path formed between the motor and the motor mounting bracket, the second-level preset vibration transmission path is the transmission path formed between the motor mounting bracket and the rear cover of the volute, and the third-level preset vibration transmission path is the transmission path formed between the rear cover of the volute and the center of the top rear plate of the entire fume extraction device.

[0033] Improved, in the above method for analyzing and processing abnormal noise of the fume extraction device, after determining the vibration transmission path that contributes to the abnormal noise signal, the method further includes: adjusting the current rotation speed of the fume extraction device, and after the abnormal noise is eliminated, causing the motor of the fume extraction device to run at the rotation speed corresponding to the time when the abnormal noise was eliminated.

[0034] The technical solution adopted by the present invention to solve the second technical problem is: a readable storage medium storing a computer program thereon, characterized in that, when the computer program is executed by a processor, it implements the noise analysis and processing method of any of the oil fume extraction devices described in the present invention.

[0035] The technical solution adopted by the present invention to solve the third technical problem is: an integrated stove, characterized in that it includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the computer program, it implements the noise analysis and processing method of the fume extraction device described in any one of the claims.

[0036] Compared with the prior art, the advantages of the present invention are as follows: The abnormal noise analysis and processing method of the fume extraction device in this invention obtains the abnormal noise signal at the air inlet, the peak value of the abnormal noise amplitude, and the corresponding abnormal noise frequency value by collecting the current rotation speed of the fume extraction device during stable operation and the sound pressure signal at its air inlet. When the vibration amplitude value of the motor body in the fume extraction device meets the first preset condition, the vibration amplitude value and the corresponding frequency value of each preset vibration transmission path of the fume extraction device are then obtained. When the vibration frequency value of the motor body, the frequency values ​​of each preset vibration transmission path, and the extracted abnormal noise frequency value meet the second preset condition, the vibration amplitude value of the motor body is greater than the obtained motor body vibration amplitude value. Each preset vibration transmission path of the amplitude value is used as a candidate vibration transmission path. When the difference between the vibration amplitude value of the candidate vibration transmission path and the vibration amplitude value of the motor body meets the preset resonance condition, the vibration transmission path contribution of each candidate vibration transmission path to the abnormal noise signal is calculated. The candidate vibration transmission path whose vibration transmission path contribution is greater than the preset vibration transmission path contribution threshold is selected. All selected candidate vibration transmission paths are determined to be vibration transmission paths that contribute to the abnormal noise signal. This realizes the determination of the main area of ​​abnormal noise in the fume extraction device, which facilitates the implementation of noise reduction measures to eliminate the abnormal noise effect generated in the main area. Attached Figure Description

[0037] Figure 1 This is a flowchart illustrating the noise analysis and processing method of the fume extraction device in an embodiment of the present invention. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] This embodiment provides a method for analyzing and processing abnormal noise from a fume extraction device, wherein the fume extraction device is a structure or component that performs the function of extracting fumes. Specifically, see... Figure 1 As shown, the method for analyzing and processing abnormal noise from the fume extraction device in this embodiment includes the following steps 1 to 10:

[0040] Step 1: Collect the current rotation speed of the range hood and the sound pressure signal at its air inlet when it is running smoothly under the user-selected setting; wherein, the current rotation speed of the range hood when it is running smoothly under the user-selected setting is marked as r;

[0041] Step 2: Process the collected sound pressure signal at the air inlet to obtain the abnormal sound signal at the air inlet, and extract the peak value of the abnormal sound amplitude and the corresponding abnormal sound frequency value of the abnormal sound signal; wherein, the peak value of the abnormal sound amplitude is labeled as S(r), and the abnormal sound frequency value corresponding to the peak value S(r) is labeled as f. sIt should be noted that the extraction of the peak amplitude and corresponding frequency value of abnormal sound signals is a mature and conventional technique, which will not be elaborated here.

[0042] Step 3: Obtain the vibration amplitude value and corresponding vibration frequency value of the motor body inside the current state of the range hood; wherein, the vibration amplitude value of the motor body inside the current state of the range hood is marked as A. 电机,r The vibration amplitude value A of the motor body 电机,r The corresponding vibration frequency value is marked as f 电机,r ;

[0043] Step 4: Make a judgment based on the obtained vibration amplitude value of the motor body:

[0044] When the vibration amplitude value A of the motor body 电机,r If the first preset condition is met, proceed to step 5; otherwise, implement measures corresponding to the abnormal motor vibration excitation. For example, in this embodiment, the first preset condition is: the vibration amplitude value A of the motor body. 电机,r Less than the preset vibration amplitude threshold A 电机,th ;

[0045] Step 5: Obtain the vibration amplitude and corresponding frequency values ​​of each preset vibration transmission path of the fume extraction device; wherein, the total number of preset vibration transmission paths of the fume extraction device is marked as N, and the nth preset vibration transmission path is L. n The vibration amplitude value at the current rotational speed r is denoted as A. n,r Vibration amplitude value A n,r The corresponding frequency value is marked as f n,r , 1≤n≤N;

[0046] The calculation method for the vibration amplitude value of each preset vibration transmission path is as follows:

[0047]

[0048] Where r is the current rotation speed corresponding to the stable operation of the fume extraction device, and A n (r) represents the nth preset vibration transmission path L on the fume extraction device at rotational speed r. j The vibration amplitude value, N is the total number of preset vibration transmission paths in the fume extraction device, I is the total number of connection points on the nth preset vibration transmission path, f n,i (r) is the vibration frequency at connection point i of the nth stage preset vibration transmission path on the fume extraction device at rotational speed r, X n,i (r) represents the vibration displacement at connection point i of the nth preset vibration transmission path on the fume extraction device at rotational speed r;

[0049] For example, in this embodiment, the fume extraction device has three preset vibration transmission paths; wherein, the first preset vibration transmission path is the transmission path formed between the motor and the motor mounting bracket, the second preset vibration transmission path is the transmission path formed between the motor mounting bracket and the volute rear cover, and the third preset vibration transmission path is the transmission path formed between the volute rear cover and the center of the top rear plate of the entire fume extraction device.

[0050] Step 6: Compare the obtained motor body vibration frequency value and the frequency values ​​of each preset vibration transmission path with the extracted abnormal sound frequencies.

[0051] If the three frequency values ​​meet the second preset condition, proceed to step 7; otherwise, proceed to step 1.

[0052] For example, in this embodiment, the second preset condition is: the vibration frequency value f of the motor body. 电机,r and the frequency values ​​f of the preset vibration transmission paths at each level n,r All are related to the different frequency f s same;

[0053] Step 7: Each preset vibration transmission path whose vibration amplitude value is greater than the obtained vibration amplitude value of the motor body is taken as a candidate vibration transmission path; wherein, the total number of candidate vibration transmission paths is marked as J, 1≤J≤N;

[0054] Step 8: Obtain the vibration amplitude difference between the vibration amplitude value of each candidate vibration transmission path and the vibration amplitude value of the motor body, and perform judgment processing on the obtained vibration amplitude difference:

[0055] When any vibration amplitude difference ΔA n,电机 If the preset resonance condition is met, proceed to step 9; otherwise, determine that the abnormal noise signal is caused by poor airflow; wherein, the vibration amplitude value of the j-th level candidate vibration transmission path at the current rotational speed r is marked as A'. n,j , 1≤j≤J; vibration amplitude value A' of the alternative vibration transmission path n,j Vibration amplitude value A of the motor body 电机,r The difference in vibration amplitude between them is marked as △A n,电机 , △A n,电机 =A' n,j -A 电机,r ;

[0056] For example, in this embodiment, the preset resonance condition is set as: vibration amplitude difference ΔA n,电机 The difference between the preset vibration amplitude threshold △A th The absolute value of the difference between them, △A n,电机 -△A th Less than the preset vibration amplitude difference threshold △Ath The preset multiple α is then determined as the vibration amplitude difference △A. n,电机 The structure on the corresponding alternative vibration transmission path is at risk of resonance. The preset multiple α is less than 1. For example, α can be set to 10%. Of course, the preset multiple α can also be set to other values ​​as needed.

[0057] Step 9: Calculate the vibration transmission path contribution of each candidate vibration transmission path to the abnormal noise signal at the current rotational speed; where the vibration transmission path contribution of the j-th candidate vibration transmission path to the abnormal noise signal at the current rotational speed r is denoted as S. j (r);

[0058] It should be noted that, in this embodiment, the contribution of the alternative vibration transmission path to the abnormal noise signal at the current rotational speed is calculated as follows:

[0059]

[0060]

[0061] in, For the j-th alternative vibration transmission path L among all alternative vibration transmission paths j The contribution of vibration transmission paths to abnormal sound signals, where J is the total number of alternative vibration transmission path levels, and R... j (r) is the transfer function of the j-th level alternative vibration transmission path, F j F represents the pressure exerted on the j-th alternative vibration transmission path. j-1 The pressure output for the (j-1)th level alternative vibration transmission path; in this embodiment, the transfer function R j The functional form of (r) can be:

[0062]

[0063] Step 10: Select candidate vibration transmission paths whose vibration transmission path contribution is greater than the preset vibration transmission path contribution threshold, and determine all selected candidate vibration transmission paths as vibration transmission paths that contribute to the abnormal sound signal.

[0064] Based on the actual noise cancellation requirements, in the noise analysis and processing method of the range hood in this embodiment, after determining the vibration transmission path that contributes to the noise signal, the method further includes adjusting the current rotation speed of the range hood, and after the noise is cancelled, causing the motor of the range hood to run at the rotation speed corresponding to the time of noise cancellation. For example, the adjustment method for the current rotation speed of the range hood is as follows: That is, each adjustment to the motor speed is based on the current speed. Increase or decrease by a factor of several.

[0065] This embodiment provides a readable storage medium. The readable storage medium stores a computer program, which, when executed by a processor, implements the noise analysis and processing method for the fume extraction device in this embodiment.

[0066] This embodiment provides a range hood. The range hood includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for analyzing and processing abnormal noise from the fume extraction device in this embodiment.

[0067] 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 method for analyzing and processing abnormal noise in a fume extraction device, characterized in that, include: Step 1: Collect the current speed of the fume extraction device and the sound pressure signal at its air inlet when it is running smoothly at the user-selected setting; Step 2: Process the collected sound pressure signal at the air inlet to obtain the abnormal sound signal at the air inlet, and extract the peak value of the abnormal sound amplitude and the abnormal sound frequency value corresponding to the peak value of the abnormal sound amplitude. Step 3: Obtain the vibration amplitude value and corresponding vibration frequency value of the motor body inside the current state of the range hood, and make a judgment based on the obtained vibration amplitude value of the motor body: When the vibration amplitude of the motor body meets the first preset condition, proceed to step 4; otherwise, implement measures corresponding to the abnormal motor vibration excitation. Step 4: Obtain the vibration amplitude and corresponding frequency values ​​of each preset vibration transmission path of the fume extraction device; Step 5: Compare the obtained motor body vibration frequency value and the frequency values ​​of each preset vibration transmission path with the extracted abnormal sound frequencies. If the three frequency values ​​meet the second preset condition, proceed to step 6; otherwise, proceed to step 1. Step 6: Each preset vibration transmission path whose vibration amplitude value is greater than the obtained vibration amplitude value of the motor body is selected as a candidate vibration transmission path. Step 7: Obtain the vibration amplitude difference between the vibration amplitude value of each candidate vibration transmission path and the vibration amplitude value of the motor body, and perform judgment processing on the obtained vibration amplitude difference: If any vibration amplitude difference meets the preset resonance condition, proceed to step 8; otherwise, determine that the abnormal sound signal is caused by poor airflow. Step 8: Calculate the contribution of each candidate vibration transmission path to the abnormal noise signal at the current rotational speed. Step 9: Select candidate vibration transmission paths whose vibration transmission path contribution is greater than the preset vibration transmission path contribution threshold, and determine all selected candidate vibration transmission paths as vibration transmission paths that contribute to the abnormal sound signal.

2. The method for analyzing and processing abnormal noise in a fume extraction device according to claim 1, characterized in that, The first preset condition is that the vibration amplitude of the motor body is less than the preset vibration amplitude threshold.

3. The method for analyzing and processing abnormal noise in a fume extraction device according to claim 1, characterized in that, The second preset condition is that the vibration frequency of the motor body and the frequency of each preset vibration transmission path are the same as the different sound frequency.

4. The method for analyzing and processing abnormal noise in a fume extraction device according to claim 1, characterized in that, The preset resonance condition is: the absolute value of the difference between the vibration amplitude difference and the preset vibration amplitude difference threshold is less than a preset multiple of the preset vibration amplitude difference threshold; wherein, the preset multiple is less than 1.

5. The method for analyzing and processing abnormal noise in a fume extraction device according to claim 1, characterized in that, In step 4, the vibration amplitude values ​​of each preset vibration transmission path are calculated as follows: Where r is the current rotation speed corresponding to the stable operation of the fume extraction device, and A n (r) represents the nth preset vibration transmission path L on the fume extraction device at rotational speed r. j The vibration amplitude value, N is the total number of preset vibration transmission paths in the fume extraction device, I is the total number of connection points on the nth preset vibration transmission path, f n,i (r) is the vibration frequency at connection point i of the nth stage preset vibration transmission path on the fume extraction device at rotational speed r, X n,i (r) represents the vibration displacement at connection point i of the nth stage preset vibration transmission path on the fume extraction device at a rotational speed r.

6. The method for analyzing and processing abnormal noise in a fume extraction device according to claim 1, characterized in that, In step 8, the contribution of the candidate vibration transmission path to the abnormal noise signal at the current rotational speed is calculated as follows: in, For the j-th alternative vibration transmission path L among all alternative vibration transmission paths j The contribution of vibration transmission paths to abnormal sound signals, where J is the total number of alternative vibration transmission path levels, and R... j (r) is the transfer function of the j-th level alternative vibration transmission path, F j F represents the pressure exerted on the j-th alternative vibration transmission path. j-1 The pressure output for the j-1th level alternative vibration transmission path.

7. The method for analyzing and processing abnormal noise in a fume extraction device according to any one of claims 1 to 6, characterized in that, The fume extraction device has three preset vibration transmission paths; the first preset vibration transmission path is the transmission path formed between the motor and the motor mounting bracket, the second preset vibration transmission path is the transmission path formed between the motor mounting bracket and the volute rear cover, and the third preset vibration transmission path is the transmission path formed between the volute rear cover and the center of the top rear plate of the entire fume extraction device.

8. The method for analyzing and processing abnormal noise in a fume extraction device according to any one of claims 1 to 6, characterized in that, After determining the vibration transmission path that contributes to the abnormal noise signal, the method further includes: adjusting the current rotation speed of the range hood, and after the abnormal noise is eliminated, causing the motor of the range hood to run at the rotation speed corresponding to the time when the abnormal noise was eliminated.

9. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for analyzing and processing abnormal noise of the fume extraction device as described in any one of claims 1 to 8.

10. An integrated stove, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the noise analysis and processing method for the fume extraction device according to any one of claims 1 to 8.

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