CN115164316A - Fresh air fan, fresh air system and control method - Google Patents
Fresh air fan, fresh air system and control method Download PDFInfo
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- CN115164316A CN115164316A CN202210791649.4A CN202210791649A CN115164316A CN 115164316 A CN115164316 A CN 115164316A CN 202210791649 A CN202210791649 A CN 202210791649A CN 115164316 A CN115164316 A CN 115164316A
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- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/003—Ventilation in combination with air cleaning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a fresh air fan, a fresh air system and a control method, relates to the field of fresh air fans, and solves the problem that the method for controlling the rotating speed of a shielding motor through a program has no universality when the noise of a unit is solved in the prior art. The fresh air fan comprises a unit shell, a motor, a vibration sensor and an audio detection sensor, wherein the motor is arranged in the unit shell, the vibration sensor is used for detecting the vibration frequency of the motor, the audio detection sensor is used for detecting the sound frequency of the unit shell, and the vibration frequency curve of the motor and the sound frequency curve of the unit shell have curvature differences. The fresh air fan can avoid resonance between the motor and the shell of the unit when in operation, so that the fresh air fan can keep stable operation, and abnormal noise generated when the fresh air fan operates can be eliminated; in addition, the vibration frequency curve of the motor and the sound frequency curve of the unit case have a difference in curvature, so that resonance between the motor and the unit case is avoided, and the motor has versatility.
Description
Technical Field
The invention relates to the technical field of new fans, in particular to a new fan, a new air system and a control method.
Background
The new fan needs to realize high-efficiency filtration, the resistance of the filter is large, and the fan part of the unit is often required to provide larger power. For fan components, a high-static-pressure high-rotation-speed motor is designed, and the motor is required to operate in a full-rotation-speed range, so that the motor and a unit shell can resonate at a certain operating frequency, and noise is caused.
In the prior art, a certain rotating speed of a shielded motor is controlled by a program, so that the motor runs in a jumping mode to avoid the frequency section, and resonance between the motor and a unit shell is avoided. However, the individual difference of the motor and the non-constant frequency of the unit shell make the method of shielding the rotation speed of the motor by program control not have universality when solving the noise of the unit.
Disclosure of Invention
One of the purposes of the present invention is to provide a new fan, which solves the technical problem that the method for controlling the rotation speed of the shield motor by a program has no universality when solving the noise of the unit in the prior art. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the fresh air fan comprises a unit shell, a motor, a vibration sensor and an audio detection sensor, wherein the motor is installed in the unit shell, the vibration sensor is used for detecting the vibration frequency of the motor, the audio detection sensor is used for detecting the sound frequency of the unit shell, and the vibration frequency curve of the motor and the sound frequency curve of the unit shell have curve difference.
According to a preferred embodiment, the fresh air fan further comprises a support, the support is fixed on the unit housing, an accommodating space is formed between the support and a bottom plate of the unit housing, the motor is fixed on the support, and at least one part of the motor is located in the accommodating space.
According to a preferred embodiment, the vibration sensor and the audio detection sensor are both disposed on the bracket, and the vibration sensor is configured to detect a vibration frequency of the bracket, and the audio detection sensor is configured to detect a sound frequency inside the unit case.
According to a preferred embodiment, the new fan further comprises a damper, and the damper is arranged between the bracket and the audio detection sensor.
According to a preferred embodiment, the bracket is of sheet metal construction and is provided with a reinforcement structure.
According to a preferred embodiment, the fresh air fan further comprises an electric control board, the electric control board is fixed on the unit housing and/or the bracket, the vibration sensor and the audio detection sensor are both connected with the electric control board, the electric control board is further connected with the motor, and the electric control board is used for controlling the rotating speed of the motor based on the detection results of the vibration sensor and the audio detection sensor, and enabling the vibration frequency curve of the motor and the sound frequency curve of the unit housing to have curvature difference.
The new fan provided by the invention at least has the following beneficial technical effects:
the fresh air fan comprises a unit shell, a motor, a vibration sensor and an audio detection sensor, wherein a vibration frequency curve of the motor and a sound frequency curve of the unit shell have curve difference, and the difference between the vibration frequency curve of the motor and the sound frequency curve of the unit shell indicates that the vibration frequency of the motor and the sound frequency of the unit shell are different, so that resonance between the motor and the unit shell can be avoided when the motor runs, the fresh air fan can stably run, and abnormal noise generated when the fresh air fan runs can be eliminated. On the other hand, the new fan avoids the resonance between the motor and the unit shell by enabling the vibration frequency curve of the motor and the sound frequency curve of the unit shell to have the curvature difference, is not influenced by the structure of the motor and the self frequency of the unit shell, has universality, and solves the technical problem that the method for shielding the rotating speed of the motor through program control in the prior art does not have the universality when the noise of the unit is solved.
The second purpose of the invention is to provide a fresh air system.
The fresh air system comprises the fresh air machine in any technical scheme.
The fresh air system provided by the invention at least has the following beneficial technical effects:
the fresh air system provided by the invention has the advantages that the fresh air fan with any technical scheme can avoid resonance generated by the motor and the unit shell during operation, so that the fresh air fan can keep stable operation, abnormal noise generated during operation of the fresh air fan can be eliminated, and the performance of the fresh air system can be improved. On the other hand, the fresh air system provided by the invention has the advantages that the fresh air machine in any technical scheme is adopted, so that the noise of the unit can be avoided being influenced by the self frequency of the motor structure and the unit shell, and the universality is realized.
The third purpose of the invention is to provide a control method of the fresh air machine.
The control method of the fresh air machine in any technical scheme of the invention comprises the following steps:
step 1: acquiring sound frequency of a unit shell, and acquiring vibration frequency of a motor;
step 2: judging whether the unit shell and the motor generate resonance;
and 3, step 3: when the unit shell and the motor generate resonance, the rotating speed of the motor is adjusted, and the vibration frequency curve of the motor and the sound frequency curve of the unit shell have a curvature difference.
According to a preferred embodiment, it is determined whether the unit case and the motor resonate or not by comparing the curvature of the vibration frequency curve of the motor and the curvature of the sound frequency curve of the unit case.
According to a preferred embodiment, when (a-b)/a < 10%, it is determined that the unit case resonates with the motor; when the (a-b)/a is larger than or equal to 10%, judging that the unit shell and the motor do not generate resonance; wherein a is the curvature of the vibration frequency curve of the motor; b is the curvature of the sound frequency curve of the unit housing.
According to a preferred embodiment, adjusting the rotational speed of the motor comprises the steps of:
step 31: controlling the motor to operate at the following rotating speed:
step 32: the motor rotates at a rotating speed Y 1 When the motor unit runs, whether the unit shell and the motor generate resonance is judged;
the motor rotates at a rotating speed Y 1 When the motor runs, the unit shell and the motor do not resonate, and the motor is controlled to be maintained at the rotating speed Y 1 Running;
wherein, Y 1 After the first adjustment, the actual rotating speed of the motor is adjusted; x 1 When the resonance is generated between the unit shell and the motor, the rotating speed of the motor is controlled; a is a coefficient, and the value of A is 1-10;
is 0 to 360 degrees.
According to a preferred embodiment, the motor is rotating at a speed Y 1 When the motor unit operates, the unit shell and the motor generate resonance, and the method further comprises the following steps:
step 33: controlling the motor to operate at the following rotating speed:
step 34: the motor rotates at a rotating speed Y 2 When the motor unit runs, whether the unit shell and the motor generate resonance is judged;
the motor rotates at a rotating speed Y 2 When the motor-driven generator set operates, the unit shell and the motor do not generate resonance, and the motor is controlled to be maintained at the rotating speed Y 2 Running;
the motor rotates at a rotating speed Y 2 When the motor-generator set operates, the motor-generator set shell and the motor generate resonance, and the rotating speed of the motor is continuously adjusted according to the methods of the step 33 and the step 34 until the motor-generator set shell and the motor do not generate resonance;
wherein, Y 2 After the second adjustment, the actual rotating speed of the motor is adjusted; x 2 Is Y 1 Is measured.
The control method of the fresh air machine provided by the invention at least has the following beneficial technical effects:
according to the control method of the fresh air fan, the vibration frequency of the motor is obtained by obtaining the sound frequency of the shell of the unit; judging whether the shell of the unit and the motor generate resonance; when the shell of the unit and the motor generate resonance, the rotating speed of the motor is adjusted, and the vibration frequency curve of the motor and the sound frequency curve of the shell of the unit have the scheme of difference in curvature, so that the motor can be prevented from generating resonance with the shell of the unit when in operation, the fresh air fan can be kept in stable operation, and abnormal noise generated when the fresh air fan operates can be eliminated. On the other hand, in the control method of the fresh air fan according to any technical scheme of the invention, when the unit casing and the motor resonate, the rotation speed of the motor is adjusted, and the vibration frequency curve of the motor and the sound frequency curve of the unit casing have different curvatures, so that the control method is free from the influence of the structure of the motor and the self frequency of the unit casing, has universality, and solves the technical problem that the method for shielding the rotation speed of the motor through program control has no universality when the unit noise is solved in the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first partial schematic view of a preferred embodiment of a new fan of the present invention;
FIG. 2 is a second partial schematic view of a preferred embodiment of a new fan of the present invention;
FIG. 3 is a flow chart of a preferred embodiment of a fresh air machine control method of the present invention;
FIG. 4 is a flow chart of a preferred embodiment of the present invention for regulating motor speed;
FIG. 5 is a schematic diagram of the vibration frequency curve of the motor and the sound frequency curve of the unit housing during operation of the new fan in accordance with the present invention;
fig. 6 is a graph showing the actual rotation speed of the motor during the operation of the new fan according to the present invention.
In the figure: 10. a unit housing; 101. a base plate; 102. a side plate; 20. a motor; 30. a vibration sensor; 40. an audio detection sensor; 50. a support; 501. a reinforcing structure; 60. a damper; 70. an electric control board; 80. a volute; 90. a fan blade.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The fresh air machine, the fresh air system and the control method of the invention are described in detail below with reference to the accompanying drawings 1 to 6 and the embodiments 1 to 3 of the specification.
Example 1
This embodiment will explain the new fan of the present invention in detail.
The new fan of the present embodiment includes a unit case 10, a motor 20, a vibration sensor 30, and an audio detection sensor 40, as shown in fig. 1 or fig. 2. Preferably, the motor 20 is installed in the set case 10, the vibration sensor 30 is used to detect the vibration frequency of the motor 20, the audio detection sensor 40 is used to detect the sound frequency of the set case 10, and the vibration frequency curve of the motor 20 and the sound frequency curve of the set case 10 have a curvature difference. More preferably, the unit housing 10 is a groove-shaped structure formed by a bottom plate 101 and a side plate 102, and components of the fresh air machine, such as the motor 20, the volute 80, the fan blades 90 and the like, are installed in the groove-shaped structure, as shown in fig. 1. The vibration sensor 30 and the audio detection sensor 40 may be products of the related art.
The curvature difference in this embodiment means that at the same time point, the slope of the vibration frequency curve of the motor 20 and the slope of the sound frequency curve of the unit case 10 have a difference; that is, at the same time point, the slope of the vibration frequency curve of the motor 20 is different from the slope of the sound frequency curve of the unit case 10; it can also mean that the difference between the slope of the vibration frequency curve of the motor 20 and the slope of the sound frequency curve of the unit case 10 at the same time is not less than a predetermined difference.
The fresh air fan of the embodiment comprises a unit shell 10, a motor 20, a vibration sensor 30 and an audio detection sensor 40, wherein a vibration frequency curve of the motor and an acoustic frequency curve of the unit shell have curve difference, and because the vibration frequency curve of the motor and the acoustic frequency curve of the unit shell have curve difference, the vibration frequency of the motor 20 is different from the acoustic frequency of the unit shell 10, resonance between the motor 20 and the unit shell 10 during operation can be avoided, so that the fresh air fan can stably operate, and abnormal noise during operation of the fresh air fan can be eliminated. On the other hand, the new fan of the embodiment avoids the resonance between the motor and the unit casing by making the vibration frequency curve of the motor and the sound frequency curve of the unit casing have curvature differences, is not affected by the structure of the motor and the self frequency of the unit casing, has universality, and solves the technical problem that the method for shielding the rotating speed of the motor through program control does not have universality when the unit noise is solved in the prior art.
According to a preferred embodiment, the fresh air machine further comprises a bracket 50, the bracket 50 is fixed on the unit housing 10, an accommodating space is formed between the bracket 50 and the bottom plate 101 of the unit housing 10, the motor 20 is fixed on the bracket 50, and at least a part of the motor 20 is located in the accommodating space, as shown in fig. 1 or fig. 2. Preferably, the vibration sensor 30 and the audio detection sensor 40 are both disposed on the bracket 50, and the vibration sensor 30 is used for detecting the vibration frequency of the bracket 50, and the audio detection sensor 40 is used for detecting the sound frequency inside the unit case 10. Preferably, a portion of the motor 20, the volute 80 and the fan blade 90 are located in the accommodating space. The new fan of the preferred technical scheme of this embodiment further includes a bracket 50, and the bracket 50 is fixed on the unit housing 10, so that the stability of the unit housing 10 can be enhanced; on the other hand, an accommodating space is formed between the bracket 50 and the bottom plate 101 of the unit housing 10, the motor 20 is fixed on the bracket 50, and at least a part of the motor 20 is located in the accommodating space, so that the mounting stability of the motor 20 can be enhanced.
According to a preferred embodiment, the fresh air machine further comprises a damper 60, the damper 60 being disposed between the bracket 50 and the audio detection sensor 40, as shown in fig. 2. The damper 60 may be a product of the prior art. The new fan of the preferred technical scheme of this embodiment still includes attenuator 60, and attenuator 60 sets up between support 50 and audio frequency detection sensor 40, through the effect of attenuator 60, can avoid on the vibration transmission of support 50 arrives audio frequency detection sensor 40, causes the inaccurate problem of audio frequency detection sensor 40 detection data.
According to a preferred embodiment, the bracket 50 is of sheet metal construction and the bracket 50 is provided with a reinforcing structure 501, as shown in fig. 1 or fig. 2. Preferably, the reinforcing structure 501 is a profiled structure provided on the bracket 50. According to the fresh air fan of the preferred technical scheme of the embodiment, the reinforcing structure 501 is arranged on the support 50, and the strength of the support 50 can be enhanced through the effect of the reinforcing structure 501, so that the motor 20 can be installed more firmly.
According to a preferred embodiment, the fresh air fan further comprises an electronic control board 70, the electronic control board 70 is fixed on the unit housing 10 and/or the bracket 50, the vibration sensor 30 and the audio detection sensor 40 are both connected to the electronic control board 70, the electronic control board 70 is also connected to the motor 20, and the electronic control board 70 is used for controlling the rotation speed of the motor 20 based on the detection results of the vibration sensor 30 and the audio detection sensor 40, and enabling the vibration frequency curve of the motor 20 and the sound frequency curve of the unit housing 10 to have curvature difference, as shown in fig. 1 or fig. 2. The fresh air machine of the preferred technical solution of this embodiment further includes an electronic control board 70, and the detection results of the vibration sensor 30 and the audio detection sensor 40 are sent to the electronic control board 70, and the electronic control board 70 determines whether the unit casing 10 and the motor 20 resonate by comparing the curvature of the vibration frequency curve of the motor 20 and the curvature of the sound frequency curve of the unit casing 10, and when the unit casing 10 and the motor 20 resonate, adjusts the rotation speed of the motor 20, and makes the vibration frequency curve of the motor 20 and the sound frequency curve of the unit casing 10 have a curvature difference, so as to prevent the motor 20 from resonating with the unit casing 10 when operating, and keep the fresh air machine operating steadily, and also eliminate abnormal noise when the fresh air machine operates.
Example 2
This embodiment will explain the fresh air system of the present invention in detail.
The new trend system of this embodiment includes the new fan of any one of embodiment 1 technical scheme. Preferably, the rest of the structure of the fresh air system can be the same as the prior art, and is not described herein again.
The fresh air system of this embodiment, owing to have any one of embodiment 1's new fan, can avoid motor 20 to produce resonance with unit casing 10 when moving to can make new fan keep the steady operation, but also can eliminate the unusual noise of new fan when moving, and then can improve the performance of fresh air system. On the other hand, the fresh air system of this embodiment, because of having the fresh air machine of any one of technical scheme in embodiment 1, when solving the unit noise, can not receive the influence of motor structure and unit casing own frequency, has the commonality.
Example 3
This embodiment describes a control method of the fresh air machine according to the present invention in detail.
Fig. 3 shows a flowchart of a control method of the fresh air machine according to any one of the embodiments 1. As shown in fig. 3, the method for controlling a fresh air machine according to any one of the embodiments 1 includes the following steps:
step 1: acquiring the sound frequency of the unit shell 10 and acquiring the vibration frequency of the motor 20;
step 2: judging whether the unit shell 10 and the motor 20 generate resonance;
and step 3: when the unit case 10 resonates with the motor 20, the rotational speed of the motor 20 is adjusted so that the vibration frequency curve of the motor 20 and the sound frequency curve of the unit case 10 have a difference in curvature.
In the control method of the fresh air machine according to any one of the technical solutions of embodiment 1, the vibration frequency of the motor 20 is obtained by obtaining the sound frequency of the unit casing 10; judging whether the unit shell 10 and the motor 20 generate resonance; when the unit shell 10 and the motor generate resonance, the rotating speed of the motor 20 is adjusted, and the vibration frequency curve of the motor 20 and the sound frequency curve of the unit shell 10 have a curvature difference scheme, so that the resonance between the motor 20 and the unit shell 10 during operation can be avoided, the fresh air fan can stably operate, and the abnormal noise during the operation of the fresh air fan can be eliminated. On the other hand, in the control method of the fresh air machine according to any of embodiment 1, when the unit casing 10 and the motor 20 resonate with each other, the rotation speed of the motor 20 is adjusted, and the vibration frequency curve of the motor 20 and the sound frequency curve of the unit casing 10 have a difference in curvature, so that the control method can be applied to a universal case without being affected by the motor structure and the own frequency of the unit casing 10, and solves the technical problem that the method of shielding the rotation speed of the motor by program control in the prior art does not have a universal case in solving the unit noise.
According to a preferred embodiment, it is determined whether the unit case 10 and the motor 20 resonate by comparing the curvature of the vibration frequency curve of the motor 20 and the curvature of the sound frequency curve of the unit case 10. The control method according to the preferred embodiment of the present invention determines whether the resonance between the unit casing 10 and the motor 20 occurs by comparing the curvature of the vibration frequency curve of the motor 20 with the curvature of the sound frequency curve of the unit casing 10 without being affected by the motor structure and the own frequency of the unit casing 10, and has universality, thereby solving the technical problem that the method for shielding the rotation speed of the motor through program control in the prior art does not have universality when solving the unit noise.
According to a preferred embodiment, when (a-b)/a < 10%, it is determined that the pack case 10 resonates with the motor 20; when the (a-b)/a is larger than or equal to 10%, judging that the unit shell 10 and the motor 20 do not generate resonance; where a is the curvature of the vibration frequency curve of the motor 20; b is the curvature of the sound frequency curve of the acoustically active unit housing 10. Specifically, when (a-b)/a is less than 10%, it is determined that the curvature of the vibration frequency curve of the motor 20 and the curvature of the sound frequency curve of the unit case 10 are not greatly different from each other, and it is determined that the unit case 10 and the motor 20 resonate; when (a-b)/a is greater than or equal to 10%, it is determined that the resonance between the unit case 10 and the motor 20 does not occur, indicating that the difference between the curvature of the vibration frequency curve of the motor 20 and the curvature of the sound frequency curve of the unit case 10 is large. It is understood that the criterion for determining whether the unit case 10 and the motor 20 resonate is not limited to this, and may be based on the remaining modifications of the above formula.
Fig. 4 shows a flow chart of a preferred embodiment for adjusting the rotational speed of the motor 20. As shown in fig. 4, adjusting the rotation speed of the motor 20 includes the steps of:
step 31: the motor 20 is controlled to operate at the following speeds:
step 32: motor 20 is rotating at speed Y 1 When the motor unit is operated, whether the machine unit shell 10 and the motor 20 generate resonance is judged.
Wherein, Y 1 The actual rotational speed of the motor 20 after the first adjustment; x 1 The rotating speed of the motor 20 when the resonance is generated between the unit shell 10 and the motor 20; a is a coefficient, and the value of A is 1-10;
is 0 to 360 degrees.
It can be appreciated that the motor 20 is not running at any speedIs limited to
Or other periodic functions, e.g.
Specifically, when the rotation speed of the motor 20 needs to be adjusted, the motor 20 is controlled according to
And if the resonance between the unit shell 10 and the motor 20 does not occur at the rotating speed, the control logic is exited, and the control motor 20 is maintained to operate at the rotating speed. Only one adjustment process is needed to prevent the resonance between the housing 10 and the motor 20.
With continued reference to FIG. 4, the motor 20 is operating at a rotational speed Y 1 In operation, the housing 10 and the motor 20 resonate, and the method further comprises the following steps:
step 33: the motor 20 is controlled to operate at the following speeds:
step 34: motor 20 is rotating at speed Y 2 When the motor unit is operated, whether the unit housing 10 and the motor 20 resonate or not is judged.
Wherein, Y 2 Actual rotational speed of the motor 20 after the second adjustment; x 2 Is Y 1 Is measured.
It will be appreciated that the operating speed of the motor 20 is not limited to
Or other periodic functions, e.g.
After the first adjustment, the housing 10 and the motor 20 still resonate, and a second adjustment is required. The second adjustment process is similar to the first adjustment process, and specifically, the motor 20 is controlled according to
And if the resonance between the unit shell 10 and the motor 20 does not occur at the rotating speed, the control logic is exited, and the control motor 20 is maintained to operate at the rotating speed. At the moment, the resonance between the unit shell 10 and the motor 20 can not be generated only by two adjusting processes; if the resonance is still generated between the unit housing 10 and the motor 20 after the second adjustment, the third adjustment and the fourth adjustment of … … are needed until the resonance is not generated between the unit housing 10 and the motor 20. The adjusting process of the third adjustment, the fourth adjustment, and even the nth adjustment (N is an integer greater than 4) is similar to the first adjustment and the second adjustment, and is not described herein again.
In the control scheme of the preferred technical solution of this embodiment, when performing the second adjustment, the motor 20 is controlled to operate at the following rotation speed:
X 2 selection of Y 1 The maximum value of (2) can ensure that the rotating speed of the motor 20 can enable the fan to have enough air output to solve the problem of filth blockage of the filter screen when the rotating speed of the motor 20 is adjusted to enable the unit shell 10 and the motor 20 not to generate resonance. Similarly, when the third adjustment, the fourth adjustment, or even the nth adjustment is performed, the maximum value of the rotation speed in the previous adjustment needs to be selected as a basis.
The following illustrates the adjustment of the rotational speed of the motor 20: starting a fresh air fan, and ensuring the output air quantity to be 600m based on the dirty gambling condition of a windshield and a filter screen set by a user 3 H, electricityThe machine 20 automatically adjusts the rotating speed to 730r/min; after running for several hours, along with the filter screen filth blockage condition, the motor 20 automatically increases the rotation speed to 750r/min, at this time, the electronic control board 70 detects that the vibration frequency curve of the motor 20 and the sound frequency curve of the unit housing 10 have similar curvatures, and judges that the unit housing 10 and the motor 20 resonate, and the vibration frequency curve of the motor 20 and the sound frequency curve of the unit housing 10 are as shown in the curves in delta t time in fig. 5; the motor 20 is controlled to operate at the following speeds:
is 0 to 360 degrees, namely the motor 20 periodically runs at 740 to 760 r/min; if the vibration frequency curve of the electric motor 20 and the sound frequency curve of the unit housing 10 still have similar curvatures in this rotational speed range, the electric motor 20 is controlled to operate at the following rotational speeds:
is 0-360 degrees, namely the motor 20 periodically runs at 750 r/min-770 r/min; until the difference between the vibration frequency curve of the motor 20 and the sound frequency curve of the unit case 10 exceeds a predetermined value, the motor 20 is controlled to operate at the rotation speed, the vibration frequency curve of the motor 20 and the sound frequency curve of the unit case 10 are shown as the curves after the time Δ t in fig. 5, and the actual rotation speed curve of the motor 20 is shown as fig. 6. After the fresh air fan continues to operate for a plurality of hours, the fresh air fan judges the actual required rotating speed of the motor 20 again based on the dirty gambling condition of the windshield and the filter screen set by the user, and when the unit shell 10 and the motor 20 do not resonate, the motor 20 operates at the normal required rotating speed; when the unit housing 10 and the motor 20 generate resonance, a rotation speed adjusting program is started.
The fresh air fan and the control method thereof are not limited to be used in a fresh air system, but also can be used in the field of air conditioners.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, the meaning of "plurality" or "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, and further, as used herein, connected may include wirelessly connected; the term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A fresh air machine comprising a unit housing (10), an electric motor (20), a vibration sensor (30) and an audio detection sensor (40), wherein the electric motor (20) is mounted within the unit housing (10), the vibration sensor (30) is configured to detect a vibration frequency of the electric motor (20), the audio detection sensor (40) is configured to detect a sound frequency of the unit housing (10), and a vibration frequency profile of the electric motor (20) and a sound frequency profile of the unit housing (10) have a curvature difference.
2. The new fan according to claim 1, characterized in that, the new fan further comprises a bracket (50), the bracket (50) is fixed on the unit housing (10), an accommodating space is provided between the bracket (50) and the bottom plate (101) of the unit housing (10), the motor (20) is fixed on the bracket (50), and at least a part of the motor (20) is located in the accommodating space.
3. The fresh air machine of claim 2 wherein the vibration sensor (30) and the audio detection sensor (40) are both disposed on the bracket (50), and the vibration sensor (30) is configured to detect a frequency of vibration of the bracket (50) and the audio detection sensor (40) is configured to detect a frequency of sound inside the crew housing (10).
4. The new fan according to claim 2, characterized in that it further comprises a damper (60), said damper (60) being arranged between said bracket (50) and said audio detection sensor (40).
5. The new fan according to claim 2, characterized in that the bracket (50) is of sheet metal construction and that a reinforcement structure (501) is provided on the bracket (50).
6. The fresh air machine according to any of claims 2 to 5, further comprising an electronic control board (70), the electronic control board (70) being fixed to the unit housing (10) and/or the bracket (50), the vibration sensor (30) and the audio detection sensor (40) both being connected to the electronic control board (70), the electronic control board (70) also being connected to the motor (20), and
the electric control board (70) is used for controlling the rotating speed of the motor (20) based on the detection results of the vibration sensor (30) and the audio detection sensor (40), and enabling the vibration frequency curve of the motor (20) and the sound frequency curve of the unit shell (10) to have curvature difference.
7. A fresh air system comprising the fresh air machine of any one of claims 1 to 6.
8. The control method of the fresh air machine according to any one of claims 1 to 6, characterized by comprising the steps of:
step 1: acquiring the sound frequency of the unit shell (10) and acquiring the vibration frequency of the motor (20);
step 2: judging whether the unit shell (10) and the motor (20) generate resonance or not;
and step 3: when the unit shell (10) and the motor (20) generate resonance, the rotating speed of the motor (20) is adjusted, and the vibration frequency curve of the motor (20) and the sound frequency curve of the unit shell (10) have curvature difference.
9. The fresh air machine control method according to claim 8, wherein it is determined whether the unit case (10) and the motor (20) resonate with each other by comparing a curvature of a vibration frequency curve of the motor (20) and a curvature of a sound frequency curve of the unit case (10).
10. The fresh air machine control method according to claim 9, wherein when (a-b)/a < 10%, it is determined that the unit case (10) resonates with the motor (20); when the ratio of (a-b)/a is larger than or equal to 10%, judging that the unit shell (10) and the motor (20) do not generate resonance;
wherein a is the curvature of the vibration frequency curve of the motor (20); b is the curvature of the sound frequency curve of the unit housing (10).
11. The fresh air machine control method according to claim 8, wherein adjusting the rotation speed of the motor (20) comprises the steps of:
step 31: controlling the motor (20) to operate at the following rotating speed:
step 32: the motor (20) is rotating at a rotating speed Y 1 When the motor unit operates, whether the unit shell (10) and the motor (20) resonate or not is judged;
the motor (20) is rotating at a rotating speed Y 1 When the motor set runs, the machine set shell (10) and the motor (20) do not generate resonance, and the motor (20) is controlled to be maintained at the rotating speed Y 1 Running;
wherein Y is 1 -the actual rotational speed of the motor (20) after the first adjustment; x 1 The rotating speed of the motor (20) when the unit shell (10) and the motor (20) generate resonance; a is a coefficient, and the value of A is 1-10;
is 0 to 360 degrees.
12. Method for controlling a fresh air machine according to claim 11, wherein the motor (20) is rotating at a speed Y 1 When in operation, the unit shell (10) and the motor (20) generate resonance, and the method further comprises the following steps:
step 33: controlling the motor (20) to operate at the following rotating speed:
step 34: the motor (20) is rotating at a rotating speed Y 2 When the motor unit operates, whether the unit shell (10) and the motor (20) resonate or not is judged;
the motor (20) is rotating at a rotating speed Y 2 When the motor set runs, the machine set shell (10) and the motor (20) do not generate resonance, and the motor (20) is controlled to be maintained at the rotating speed Y 2 Running;
the motor (20) is rotating at a rotating speed Y 2 When the motor unit is operated, the unit shell (10) and the motor (20) generate resonance, and the rotating speed of the motor (20) is continuously adjusted according to the method of the step 33 and the step 34 until the unit shell (10) and the motor (20) do not generate resonance;
wherein, Y 2 After the second adjustment, the actual rotating speed of the motor (20); x 2 Is Y 1 Is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210791649.4A CN115164316A (en) | 2022-07-05 | 2022-07-05 | Fresh air fan, fresh air system and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210791649.4A CN115164316A (en) | 2022-07-05 | 2022-07-05 | Fresh air fan, fresh air system and control method |
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| US10425720B1 (en) * | 2018-05-03 | 2019-09-24 | Chicony Electronics Co., Ltd. | Composite speaker module and speaker device |
| CN218001718U (en) * | 2022-07-05 | 2022-12-09 | 珠海格力电器股份有限公司 | New fan and new trend system |
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| JP2004142641A (en) * | 2002-10-25 | 2004-05-20 | Advics:Kk | Tire pneumatic pressure detection device |
| CN105737316A (en) * | 2016-05-03 | 2016-07-06 | 王成 | Fresh air host |
| JP2018193887A (en) * | 2017-05-15 | 2018-12-06 | 本田技研工業株式会社 | Vehicle and vehicular control method |
| US10425720B1 (en) * | 2018-05-03 | 2019-09-24 | Chicony Electronics Co., Ltd. | Composite speaker module and speaker device |
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