CN117028285A - Detection method and device for cross-flow fan of indoor unit, air conditioner and medium - Google Patents
Detection method and device for cross-flow fan of indoor unit, air conditioner and medium Download PDFInfo
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- CN117028285A CN117028285A CN202310848340.9A CN202310848340A CN117028285A CN 117028285 A CN117028285 A CN 117028285A CN 202310848340 A CN202310848340 A CN 202310848340A CN 117028285 A CN117028285 A CN 117028285A
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000003860 storage Methods 0.000 claims description 14
- 230000002159 abnormal effect Effects 0.000 abstract description 19
- 238000009825 accumulation Methods 0.000 abstract description 8
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 9
- 230000005484 gravity Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000356 contaminant Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/0563—Bearings cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0025—Cross-flow or tangential fans
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application relates to the technical field of air conditioners, and discloses a detection method for a cross-flow fan of an indoor unit, wherein the indoor unit comprises: a cross-flow fan provided with a rotation shaft; the bearing frame, its radial rubber ring that is provided with, rubber ring inner wall evenly is provided with a plurality of pressure sensor, and the pivot is fixed in the bearing frame and supports and lean on rubber ring inner wall setting, the method includes: under the condition that the cross-flow fan rotates at a constant speed, pressure values of positions where the pressure sensors are located are obtained; obtaining a pressure curve of the inner wall of the rubber ring according to the plurality of pressure values; and determining the balance state of the cross-flow fan according to the pressure curve. The application can rapidly detect the pollutant accumulation condition of the fan blade and accurately determine the abnormal source of the cross-flow fan. The application also discloses a detection device for the cross-flow fan of the indoor unit, an air conditioner and a medium.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a detection method and device for a cross-flow fan of an indoor unit, an air conditioner and a medium.
Background
At present, air conditioners are favored by consumers because of their diversified environmental conditioning functions. Along with the rapid development of science and technology, the accuracy and reliability of the environmental regulation of the air conditioner are also gradually improved. With the long-term use of the air conditioner, the blades of the cross-flow fan are damaged due to the action of an external wind source, condensed water or dust, so that the cross-flow fan is abnormal in rotation, even the air conditioner is caused to emit abnormal sound or vibrate abnormally, and the use experience of a user is affected.
The related art discloses a fan control method, comprising: monitoring whether the rotation of the blades of the fan is abnormal; if abnormal rotation exists in the fan blades, acquiring a decibel value of noise emitted by the fan, and judging whether the decibel value is larger than a first preset decibel threshold value or not; when the decibel value is larger than a first preset decibel threshold value, controlling the fan to rotate along the horizontal direction, and recording the decibel value of the noise of the fan at each yaw angle; and adjusting an air supply strategy of the fan according to the decibel value of the noise of the fan at each yaw angle so that the decibel value of the noise emitted by the fan is smaller than or equal to a first preset decibel threshold value. Thus, the noise problem caused by the interference of the external wind source during the operation of the fan is solved by the related technology, and the intelligence of the fan is improved.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
when the cross-flow fan is interfered by an external wind source, the fan blades can generate obvious shaking to cause larger noise, and the related technology can detect the noise generated by the external wind source. However, when the cross flow fan is free from the disturbance of the external wind source, if the thickness of the contaminant adhering to the fan blade is small, the mechanical load to the fan blade is small, and at this time, the noise decibel value of the cross flow fan is not significantly increased. Therefore, the related art cannot rapidly detect the accumulation of contaminants on the fan blades, and it is difficult to determine the abnormal source of the cross flow fan.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a detection method, a detection device, an air conditioner and a medium for an indoor unit cross-flow fan, so as to rapidly detect the pollutant accumulation condition of a fan blade and accurately determine the abnormal source of the cross-flow fan.
In some embodiments, an indoor unit includes: a cross-flow fan provided with a rotation shaft; the bearing frame, its radial rubber ring that is provided with, rubber ring inner wall evenly is provided with a plurality of pressure sensor, and the pivot is fixed in the bearing frame and supports and lean on rubber ring inner wall setting, the method includes: under the condition that the cross-flow fan rotates at a constant speed, pressure values of positions where the pressure sensors are located are obtained; obtaining a pressure curve of the inner wall of the rubber ring according to the plurality of pressure values; and determining the balance state of the cross-flow fan according to the pressure curve.
In some embodiments, the obtaining the pressure curve of the inner wall of the rubber ring according to the plurality of pressure values includes: obtaining pressure curves corresponding to the through-flow fans rotating for N circles along the circumferential direction, wherein N is more than 2; the determining the balance state of the cross-flow fan according to the pressure curve comprises the following steps: in the case where the pressure curve is parabolic and in an axisymmetric pattern, the cross-flow fan balance is determined.
In some embodiments, the determining the balance state of the cross-flow fan according to the pressure curve further includes: acquiring target positions corresponding to the peaks of the N pressure curves; and determining unbalance of the through-flow fan under the condition that the target position dynamically changes along the positions of the plurality of pressure sensors.
In some embodiments, after the target position dynamically changes along the positions of the plurality of pressure sensors, the method further includes: acquiring the distance between the target position and the reference position; determining the unbalance degree of the cross-flow fan according to the corresponding relation between the distance and the unbalance degree, wherein the distance is positively related to the unbalance degree; wherein, the reference position is the lowest point position of the inner wall of the rubber ring.
In some embodiments, an indoor unit includes: a cross-flow fan provided with a rotation shaft; the bearing frame, its radial rubber ring that is provided with, rubber ring inner wall evenly is provided with a plurality of position sensor, and the pivot is fixed in the bearing frame and supports the rubber ring inner wall setting, the method includes: under the condition that the cross-flow fan rotates at a constant speed, position values corresponding to a plurality of position sensors are obtained; obtaining a position curve of the inner wall of the rubber ring according to the plurality of position values; and determining the balance state of the cross-flow fan according to the position curve.
In some embodiments, the obtaining a position curve of the inner wall of the rubber ring according to the plurality of position values includes: acquiring position curves corresponding to M circles of circumferential rotations of the cross-flow fan, wherein M is more than 2; the determining the balance state of the cross-flow fan according to the position curve comprises the following steps: in the case where the M position curves are all disk cam patterns and the M position curves are all axisymmetric in the vertical direction, the cross flow fan balance is determined.
In some embodiments, the determining the balance state of the cross-flow fan according to the position curve further includes: under the condition that the M position curves are disc cam patterns, sequentially acquiring respective symmetry axes of the 1 st to M th position curves along a time sequence; and determining unbalance of the cross-flow fan under the condition that symmetry axes of the 1 st to M th position curves are changed along the radial direction of the rotating shaft.
In some embodiments, the determining the cross-flow fan imbalance includes: obtaining convex offset peaks of disc cam patterns of M position curves; the processor determines that the cross-flow fan is unbalanced if the M convex offset peaks are all greater than or equal to the offset reference value; wherein the bump offset peak represents the maximum value of the positional offset; the positional deviation represents the distance between the current position when the cross flow fan rotates and the current position when the cross flow fan is stationary. The current position represents the installation position of the arbitrary position sensor.
In some embodiments, the apparatus includes a processor and a memory storing program instructions configured to perform a method for detecting a cross-flow fan of an indoor unit as described above when the program instructions are executed.
In some embodiments, the air conditioner includes: an indoor unit comprising: a cross-flow fan provided with a rotation shaft; the bearing seat is radially provided with a rubber ring, the inner wall of the rubber ring is uniformly provided with a plurality of pressure sensors and a plurality of position sensors, and the rotating shaft is fixed on the bearing seat and is propped against the inner wall of the rubber ring; the detection device for the indoor unit cross-flow fan described above is mounted to the cross-flow fan.
In some embodiments, the storage medium stores program instructions that, when executed, perform a method for detecting a cross-flow fan of an indoor unit as described above.
The detection method, the detection device, the air conditioner and the medium for the cross-flow fan of the indoor unit provided by the embodiment of the disclosure can realize the following technical effects:
the cross flow fan is in a dynamic balance state in the rotating process, and when the cross flow fan is subjected to accumulation of pollutants such as condensed water or dust, the dynamic balance state is destroyed. At this time, the rotation state of the cross-flow fan is unbalanced, and pressure is generated on the inner wall of the rubber ring, so that the inner wall of the rubber ring is elastically deformed. Meanwhile, the pressure values of the cross-flow fan on different positions of the inner wall of the rubber ring are different due to the action of gravity when the cross-flow fan rotates at a uniform speed. Therefore, in the embodiment of the disclosure, the plurality of pressure sensors are uniformly arranged on the inner wall of the rubber ring, the pressure curve of the inner wall of the rubber ring is obtained according to the plurality of pressure values obtained when the wind speed main body rotates at a uniform speed, and the balance state of the cross-flow fan is determined according to the pressure curve. Thus, the embodiment of the disclosure can rapidly detect the unbalance condition of the cross-flow fan caused by the accumulation of pollutants on the blades of the cross-flow fan, and effectively improve the accuracy of detecting abnormal sources of the cross-flow fan.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic view of an exploded construction of a cross-flow fan and a bearing housing provided by an embodiment of the present disclosure;
FIG. 2 is a schematic view of the partial structure of the area A in FIG. 1 provided by an embodiment of the present disclosure;
FIG. 3 is a schematic view of a rubber ring according to an embodiment of the present disclosure;
FIG. 4 is a schematic illustration of pressure curves at equilibrium provided by embodiments of the present disclosure;
FIG. 5 is a schematic illustration of pressure curves under unbalanced conditions provided by embodiments of the present disclosure;
FIG. 6 is a schematic illustration of a position curve in an equilibrium state provided by an embodiment of the present disclosure;
FIG. 7 is a schematic illustration of a position profile in an out of balance condition provided by an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a detection method for a cross-flow fan of an indoor unit according to an embodiment of the disclosure;
fig. 9 is a schematic diagram of another detection method for a cross-flow fan of an indoor unit according to an embodiment of the disclosure;
fig. 10 is a schematic diagram of another detection method for a cross-flow fan of an indoor unit according to an embodiment of the disclosure;
fig. 11 is a schematic diagram of a detection device for a cross-flow fan of an indoor unit according to an embodiment of the disclosure;
fig. 12 is a schematic view of an air conditioner according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
With the long-term use of the air conditioner, the blades of the cross-flow fan are damaged due to the action of an external wind source, condensed water or dust, so that the cross-flow fan is abnormal in rotation, even the air conditioner is caused to emit abnormal sound or vibrate abnormally, and the use experience of a user is affected.
The related art discloses a fan control method, comprising: monitoring whether the rotation of the blades of the fan is abnormal; if abnormal rotation exists in the fan blades, acquiring a decibel value of noise emitted by the fan, and judging whether the decibel value is larger than a first preset decibel threshold value or not; when the decibel value is larger than a first preset decibel threshold value, controlling the fan to rotate along the horizontal direction, and recording the decibel value of the noise of the fan at each yaw angle; and adjusting an air supply strategy of the fan according to the decibel value of the noise of the fan at each yaw angle so that the decibel value of the noise emitted by the fan is smaller than or equal to a first preset decibel threshold value. Thus, the noise problem caused by the interference of the external wind source during the operation of the fan is solved by the related technology, and the intelligence of the fan is improved.
When the cross-flow fan is interfered by an external wind source, the fan blades can generate obvious shaking to cause larger noise, and the related technology can detect the noise generated by the external wind source. However, when the cross flow fan is free from the disturbance of the external wind source, if the thickness of the contaminant adhering to the fan blade is small, the mechanical load to the fan blade is small, and at this time, the noise decibel value of the cross flow fan is not significantly increased. Therefore, the related art cannot rapidly detect the accumulation of contaminants on the fan blades, and it is difficult to determine the abnormal source of the cross flow fan.
As shown in fig. 1 and 2, the indoor unit includes: a cross-flow fan 100 provided with a rotary shaft 100a. The bearing housing 200 is radially provided with a rubber ring 201. The inner wall of the rubber ring 201 is uniformly provided with a plurality of pressure sensors (not shown in the figure), and is uniformly provided with a plurality of position sensors (not shown in the figure). The rotating shaft 100a is fixed on the bearing seat 200 and abuts against the inner wall of the rubber ring 201.
Based on the above-mentioned cross-flow fan structure, referring to fig. 8, an embodiment of the disclosure provides a detection method for an indoor unit cross-flow fan, including:
and S01, under the condition that the cross-flow fan rotates at a constant speed, the processor obtains pressure values of positions where the plurality of pressure sensors are located.
S02, the processor obtains a pressure curve of the inner wall of the rubber ring according to the plurality of pressure values.
S03, the processor determines the balance state of the cross-flow fan according to the pressure curve.
By adopting the detection method for the cross-flow fan of the indoor unit, which is provided by the embodiment of the disclosure, the cross-flow fan is in a dynamic balance state in the rotating process, and when the cross-flow fan is accumulated by pollutants such as condensed water or dust, the dynamic balance state is destroyed. At this time, the rotation state of the cross-flow fan is unbalanced, and pressure is generated on the inner wall of the rubber ring, so that the inner wall of the rubber ring is elastically deformed. Meanwhile, the pressure values of the cross-flow fan on different positions of the inner wall of the rubber ring are different due to the action of gravity when the cross-flow fan rotates at a uniform speed. Therefore, in the embodiment of the disclosure, the plurality of pressure sensors are uniformly arranged on the inner wall of the rubber ring, the pressure curve of the inner wall of the rubber ring is obtained according to the plurality of pressure values obtained when the wind speed main body rotates at a uniform speed, and the balance state of the cross-flow fan is determined according to the pressure curve. Thus, the embodiment of the disclosure can rapidly detect the unbalance condition of the cross-flow fan caused by the accumulation of pollutants on the blades of the cross-flow fan, and effectively improve the accuracy of detecting abnormal sources of the cross-flow fan.
Fig. 4 shows the pressure curve in the equilibrium state. Referring to FIG. 4, the center of the rubber ring is shown as being along with the reference position n m The corresponding position is a first position n 1 In a first position n 1 The second positions n are sequentially and evenly distributed clockwise along the circumference of the inner wall of the rubber ring as the initial position 2 Third position n 3 Fourth position n 4 .. until the first position n is reached 1 . It should be noted that the distribution number of the pressure sensors may be 2 p . p is N+ and p is more than or equal to 2. The rubber ring provided in fig. 3 is sequentially and uniformly distributed with eight pressure sensors along the circumferential direction thereof. In a specific application, the number of distribution of the pressure sensors may not be specifically limited by the embodiments of the present disclosure.
As shown in fig. 3 and 4, the horizontal axis n represents the position of the rubber ring where the pressure sensor is provided. When the cross-flow fan is in a static state, the position of the lowest point of the inner wall of the rubber ring is the reference position n m . When the cross-flow fan rotates at a constant speed, if the cross-flow fan is in a balanced state, the reference position n m Will be subjected to gravity, resulting in n m The pressure value received is the largest. Correspondingly, in the pressure curve, reference position n m Corresponding to the pressure peak.
Fig. 5 shows a pressure curve in an unbalanced state. As shown in fig. 5, if the flow fan is in an unbalanced state, the center of gravity of the flow fan is changed, and the flow fan rotates at a constant speed from the rotation axis, and the center of gravity of the flow fan rotates around the rotation axis. Therefore, under the action of centrifugal force, the through-flow fan also rotates around the rotating shaft at the position point corresponding to the pressure peak value of the inner wall of the rubber ring. At this time, the pressure curve presented by the through-flow fan after the through-flow fan rotates for a circle number T changes in a wave shape.
Optionally, the processor obtains a pressure curve of the inner wall of the rubber ring, including:
the processor obtains the pressure curves corresponding to the through-flow fan rotating N circles along the circumferential direction, wherein N is more than 2.
The processor determines the balance state of the cross-flow fan according to the pressure curve, and comprises the following steps:
the processor determines the cross-flow fan balance in the case where the pressure curve is parabolic and axisymmetric.
Thus, due to the reference position n m Corresponds to the pressure peak value, and therefore, the position corresponding to the peak value of the obtained pressure curve is the reference position n m And when the cross-flow fan rotates in a single turn, the reference position n is anticlockwise m To the first position n 1 Corresponding pressure values and reference position n in clockwise direction m To the first position n 1 The corresponding pressure values are respectively equal. That is, when the cross-flow fan is balanced (i.e., in a dynamic balance state), the pressure curves corresponding to the N circles obtained by rotating the cross-flow fan in the circumferential direction N circles overlap each other, and the pressure curves are parabolic and have axisymmetric patterns. Therefore, the implementation of the method and the device can judge whether the cross-flow fan is balanced according to the shape presented by the pressure curve, and are beneficial to improving the accuracy of detecting abnormal sources of the cross-flow fan.
Optionally, the processor determines an equilibrium state of the cross-flow fan according to the pressure curve, including:
the processor determines the cross-flow fan balance in the case where the pressure curve is parabolic and axisymmetric.
The processor obtains target positions corresponding to the peaks of the N pressure curves.
The processor determines a cross-flow fan imbalance in the event that the target position dynamically varies along the locations of the plurality of pressure sensors.
Therefore, when the through-flow fan is unbalanced, the position point corresponding to the pressure value of the inner wall of the rubber ring rotates around the rotating shaft, and accordingly, the target position dynamically changes along the positions of the pressure sensors. Therefore, the embodiment of the disclosure can judge the unbalance condition of the cross-flow fan according to whether the target position is dynamically changed along the positions of the plurality of pressure sensors. Therefore, the unbalance condition of the cross-flow fan can be detected rapidly, and the accuracy of the detection of the abnormal source of the cross-flow fan is improved effectively.
Optionally, as shown in connection with fig. 9, the processor determines an equilibrium state of the cross-flow fan according to the pressure curve, including:
s11, the processor determines the balance of the cross-flow fan when the pressure curve is parabolic and is in an axisymmetric graph.
S12, the processor acquires target positions corresponding to the peaks of the N pressure curves.
S13, the processor determines unbalance of the cross-flow fan under the condition that the target position dynamically changes along the positions of the pressure sensors.
S14, the processor acquires the distance between the target position and the reference position.
S15, the processor determines the unbalance degree of the cross-flow fan according to the corresponding relation between the distance and the unbalance degree, and the distance and the unbalance degree are positively related.
Wherein, the reference position is the lowest point position of the inner wall of the rubber ring.
Thus, the farther the target position is from the reference position, the greater the pressure peak is affected by the degree of gravity deviation, and correspondingly, the greater the degree of imbalance. Thus, after the target position is determined to dynamically change along the positions of the plurality of pressure sensors, the imbalance degree of the cross-flow fan is determined according to the positive correlation relation between the distance and the imbalance degree, and the imbalance degree of the cross-flow fan is determined and meanwhile accurate judgment of the imbalance degree is achieved.
Fig. 6 shows a position curve in the equilibrium state. Referring to FIG. 6, the rubber ring is shown at its centerReference position n m The corresponding position is a first position n 1 In a first position n 1 The second positions n are sequentially and evenly distributed clockwise along the circumference of the inner wall of the rubber ring as the initial position 2 Third position n 3 Fourth position n 4 .. until the first position n is reached 1 . It should be noted that the distribution number of the position sensors may be 2 q . q is N+ and p is more than or equal to 2. In a specific application, the number of distributions of the position sensors in the embodiments of the present disclosure may not be particularly limited.
As shown in fig. 3 and 6, when the cross-flow fan is in a stationary state, the position of the lowest point of the inner wall of the rubber ring is the reference position n m . When the cross-flow fan rotates at a constant speed, if the cross-flow fan is in a balanced state, the reference position n m Will be subjected to gravity, resulting in n m The maximum pressure value is received, the reference position n m The corresponding positional offset is also the largest. Correspondingly, the position curve is in the shape of a cam disk and is axisymmetric along the vertical direction, and the reference position n m Corresponding to the offset peak. The positional deviation represents the distance between the current position when the cross flow fan rotates and the current position when the cross flow fan is stationary. The current position represents the installation position of the arbitrary position sensor.
Fig. 7 shows a pressure curve in an unbalanced state. As shown in fig. 7, if the flow fan is in an unbalanced state, the center of gravity of the flow fan is changed, and the flow fan is rotated at a constant speed from the rotation shaft, and the center of gravity of the flow fan is rotated around the rotation shaft. Therefore, under the action of centrifugal force, the through-flow fan also rotates around the rotating shaft at the position point corresponding to the convex offset peak value of the inner wall of the rubber ring. At this time, when the cross-flow fan rotates in the circumferential direction, the symmetry axes of the 1 st to the M-th position curves acquired along the time sequence change in the radial direction of the rotation axis. Wherein the bump offset peak represents the maximum value of the positional offset.
Based on the above-mentioned cross-flow fan structure, referring to fig. 10, an embodiment of the disclosure provides another detection method for an indoor unit cross-flow fan, including:
s21, under the condition that the cross-flow fan rotates at a constant speed, the processor obtains position values corresponding to the plurality of position sensors.
S22, the processor obtains a position curve of the inner wall of the rubber ring according to the plurality of position values.
S23, the processor determines the balance state of the cross-flow fan according to the position curve.
By adopting the detection method for the cross-flow fan of the indoor unit, which is provided by the embodiment of the disclosure, the cross-flow fan is in a dynamic balance state in the rotating process, and when the cross-flow fan is accumulated by pollutants such as condensed water or dust, the dynamic balance state is destroyed. At this time, the rotation state of the through-flow fan is unbalanced, and pressure is generated on the inner wall of the rubber ring, so that the inner wall of the rubber ring is elastically deformed, and deformation amounts of different positions of the inner wall of the rubber ring are different. Therefore, in the embodiment of the disclosure, a plurality of position sensors are uniformly arranged on the inner wall of the rubber ring, a position curve of the inner wall of the rubber ring is obtained according to a plurality of position values obtained when the wind speed main body rotates at a uniform speed, and the balance state of the cross-flow fan is determined according to the position curve. Thus, the embodiment of the disclosure can rapidly detect the unbalance condition of the cross-flow fan caused by the accumulation of pollutants on the blades of the cross-flow fan, and effectively improve the accuracy of detecting abnormal sources of the cross-flow fan.
Optionally, the processor obtains a position curve of the inner wall of the rubber ring according to the plurality of position values, including:
the processor acquires position curves corresponding to the circumferential rotation M circles of the cross-flow fan respectively, wherein M is more than 2.
The processor determines the balance state of the cross-flow fan according to the position curve, and comprises the following steps:
in the case where the M position curves are all cam disk patterns and the M position curves are all axisymmetric in the vertical direction, the processor determines the cross-flow fan balance.
Therefore, when the through-flow fan is balanced, the position curve is in the shape of the disc cam and is axisymmetric along the vertical direction, and therefore whether the through-flow fan is balanced or not is judged according to the shape of the M position curves and the axisymmetric direction, and the accuracy of detecting abnormal sources of the through-flow fan is improved.
Optionally, the processor determines the balance state of the cross-flow fan according to the position curve, and further includes:
under the condition that the M position curves are all disc cam patterns, the processor sequentially acquires symmetry axes of the 1 st to M th position curves along the time sequence.
The processor determines the imbalance of the cross-flow fan under the condition that the symmetry axes of the 1 st to M th position curves are changed along the radial direction of the rotating shaft.
Thus, when the cross-flow fan is unbalanced, the symmetry axes of the 1 st to the M th position curves are changed along the radial direction of the rotating shaft, so that the unbalance condition of the cross-flow fan can be judged according to the shape of the M position curves and the change condition of the symmetry axes along the rotating shaft. Therefore, the unbalance condition of the cross-flow fan can be detected rapidly, and the accuracy of the detection of the abnormal source of the cross-flow fan is improved effectively.
Optionally, as shown in connection with fig. 6, the processor determines a cross-flow fan imbalance, including:
the processor obtains the lobe shift peaks of the cam pattern of the M position curves.
In the case where the M boss offset peaks are all greater than or equal to the offset reference value, the processor determines that the cross-flow fan is out of balance.
Wherein the bump offset peak represents the maximum value of the positional offset. The positional deviation represents the distance between the current position when the cross flow fan rotates and the current position when the cross flow fan is stationary. The current position represents the installation position of the arbitrary position sensor.
Offset reference value = weight x offset threshold. Wherein the offset threshold value represents the distance D between the reference position and the lowest point of the cam pattern when the cross-flow fan is in a balanced state d . The weight is greater than or equal to 60% and less than 100%.
Thus, the cross-flow fan is swayed for a short time during the startup or shutdown stage. At this time, the position curve formed by the rotation of the cross-flow fan in the circumferential direction also forms a cam disk pattern, but the peak of the protrusion offset is small. And when the through-flow fan is unbalanced, the convex offset peak value of the cam disc graph of the position curve is larger. Therefore, according to the embodiment of the disclosure, the offset reference value is set according to the offset threshold value and the weight, and whether the cross-flow fan is unbalanced is determined according to the magnitude relation between the M protruding offset peak values and the offset reference value, so that the reliability of unbalance condition detection of the cross-flow fan is further improved, and the accuracy of abnormality source detection of the cross-flow fan is further improved.
Referring to fig. 11, an embodiment of the present disclosure provides a detection apparatus 300 for a cross-flow fan of an indoor unit, including a processor (processor) 400 and a memory (memory) 401. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 402 and a bus 403. The processor 400, the communication interface 402, and the memory 401 may communicate with each other via the bus 403. The communication interface 402 may be used for information transfer. The processor 400 may call the logic instructions in the memory 401 to perform the detection method for the indoor unit cross-flow fan of the above embodiment.
Further, the logic instructions in the memory 401 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 401 is a computer readable storage medium, and may be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 400 executes the program instructions/modules stored in the memory 401 to perform the functional application and the data processing, i.e., to implement the detection method for the indoor unit cross-flow fan in the above-described embodiment.
Memory 401 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. In addition, memory 401 may include high-speed random access memory, and may also include nonvolatile memory.
As shown in conjunction with fig. 12, an embodiment of the present disclosure provides an air conditioner 600, comprising: an indoor unit and the above-described detecting device 300 for an indoor unit cross-flow fan. The indoor unit comprises a cross-flow fan and a bearing seat. And a cross-flow fan provided with a rotation shaft. The bearing frame, its radial rubber ring that is provided with, rubber ring inner wall evenly is provided with a plurality of pressure sensor and evenly is provided with a plurality of position sensor, and the pivot is fixed in the bearing frame and supports the rubber ring inner wall setting. The detecting device 300 for the indoor unit cross flow fan is mounted to the cross flow fan. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the detection apparatus 300 for an indoor unit cross-flow fan may be adapted to a viable product body to achieve other viable embodiments.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described detection method for a cross-flow fan of an indoor unit.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A detection method for a cross-flow fan of an indoor unit, characterized in that the indoor unit comprises: a cross-flow fan provided with a rotation shaft; the bearing frame, its radial rubber ring that is provided with, rubber ring inner wall evenly is provided with a plurality of pressure sensor, and the pivot is fixed in the bearing frame and supports and lean on rubber ring inner wall setting, the method includes:
under the condition that the cross-flow fan rotates at a constant speed, pressure values of positions where the pressure sensors are located are obtained;
obtaining a pressure curve of the inner wall of the rubber ring according to the plurality of pressure values;
and determining the balance state of the cross-flow fan according to the pressure curve.
2. The method of claim 1, wherein obtaining a pressure curve of the inner wall of the rubber ring based on the plurality of pressure values comprises:
obtaining pressure curves corresponding to the through-flow fans rotating for N circles along the circumferential direction, wherein N is more than 2;
the determining the balance state of the cross-flow fan according to the pressure curve comprises the following steps:
in the case where the pressure curve is parabolic and in an axisymmetric pattern, the cross-flow fan balance is determined.
3. The method of claim 2, wherein determining the equilibrium state of the cross-flow fan based on the pressure profile further comprises:
acquiring target positions corresponding to the peaks of the N pressure curves;
and determining unbalance of the through-flow fan under the condition that the target position dynamically changes along the positions of the plurality of pressure sensors.
4. The method of claim 3, wherein after the target position dynamically changes along the positions of the plurality of pressure sensors, further comprising:
acquiring the distance between the target position and the reference position;
determining the unbalance degree of the cross-flow fan according to the corresponding relation between the distance and the unbalance degree, wherein the distance is positively related to the unbalance degree;
wherein, the reference position is the lowest point position of the inner wall of the rubber ring.
5. A detection method for a cross-flow fan of an indoor unit, characterized in that the indoor unit comprises: a cross-flow fan provided with a rotation shaft; the bearing frame, its radial rubber ring that is provided with, rubber ring inner wall evenly is provided with a plurality of position sensor, and the pivot is fixed in the bearing frame and supports the rubber ring inner wall setting, the method includes:
under the condition that the cross-flow fan rotates at a constant speed, position values corresponding to a plurality of position sensors are obtained;
obtaining a position curve of the inner wall of the rubber ring according to the plurality of position values;
and determining the balance state of the cross-flow fan according to the position curve.
6. The method of claim 5, wherein obtaining a location profile of the inner wall of the rubber ring based on the plurality of location values comprises:
acquiring position curves corresponding to M circles of circumferential rotations of the cross-flow fan, wherein M is more than 2;
the determining the balance state of the cross-flow fan according to the position curve comprises the following steps:
in the case where the M position curves are all disk cam patterns and the M position curves are all axisymmetric in the vertical direction, the cross flow fan balance is determined.
7. The method of claim 6, wherein determining the balance of the cross-flow fan based on the location profile further comprises:
under the condition that the M position curves are disc cam patterns, sequentially acquiring respective symmetry axes of the 1 st to M th position curves along a time sequence;
and determining unbalance of the cross-flow fan under the condition that symmetry axes of the 1 st to M th position curves are changed along the radial direction of the rotating shaft.
8. A detection apparatus for an indoor unit cross-flow fan, comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the detection method for an indoor unit cross-flow fan according to any one of claims 1 to 7 when the program instructions are executed.
9. An air conditioner, comprising:
an indoor unit comprising: a cross-flow fan provided with a rotation shaft; the bearing seat is radially provided with a rubber ring, the inner wall of the rubber ring is uniformly provided with a plurality of pressure sensors and a plurality of position sensors, and the rotating shaft is fixed on the bearing seat and is propped against the inner wall of the rubber ring;
the detecting device for a cross-flow fan of an indoor unit according to claim 8, mounted to the cross-flow fan.
10. A storage medium storing program instructions which, when executed, perform the method for detecting a cross-flow fan of an indoor unit according to any one of claims 1 to 7.
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| CN202310848340.9A CN117028285A (en) | 2023-07-11 | 2023-07-11 | Detection method and device for cross-flow fan of indoor unit, air conditioner and medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310848340.9A CN117028285A (en) | 2023-07-11 | 2023-07-11 | Detection method and device for cross-flow fan of indoor unit, air conditioner and medium |
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| CN202310848340.9A Pending CN117028285A (en) | 2023-07-11 | 2023-07-11 | Detection method and device for cross-flow fan of indoor unit, air conditioner and medium |
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