CN114136616A

CN114136616A - Magnetic suspension compressor, bearing detection method and device thereof and air conditioner

Info

Publication number: CN114136616A
Application number: CN202111423866.XA
Authority: CN
Inventors: 杨斌; 林怀宇; 李田; 贺伟衡; 岳宝; 刘树清; 胡善德; 靳珂珂; 冉正云
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-04

Abstract

The invention provides a magnetic suspension compressor, a bearing detection method and a bearing detection device thereof and an air conditioner, wherein the bearing detection method of the magnetic suspension compressor comprises the following steps: acquiring a first direction to be calibrated; outputting a first pulse width modulation signal to a driving device of the bearing according to a first direction to be calibrated; acquiring the displacement of a bearing to obtain a first position curve group, wherein the first position curve group comprises a plurality of sampling points; determining the occupation ratio of the sampling points of which the displacement quantity meets the preset deviation condition in a plurality of sampling points; according to the comparison result of the ratio and the preset ratio threshold, the detection result of the first position curve group is determined, the bearing of the magnetic suspension compressor can be calibrated, the calibrated state is detected, the calibration result is ensured, in the process, automatic adjustment can be achieved under the condition that the suspension center of the bearing deviates, and the risk that the magnetic suspension compressor is damaged due to the fact that the suspension center of the bearing deviates is reduced.

Description

Magnetic suspension compressor, bearing detection method and device thereof and air conditioner

Technical Field

The invention relates to the technical field of control, in particular to a magnetic suspension compressor, a bearing detection method and device thereof and an air conditioner.

Background

The existing control method of the magnetic suspension compressor is mostly used for fault early warning and can not prevent the faults of the magnetic suspension compressor.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the present invention provides a bearing detection method for a magnetic levitation compressor.

In a second aspect of the present invention, a bearing detecting apparatus for a magnetic levitation compressor is provided.

A third aspect of the present invention is to provide one of the magnetic levitation compressors.

In a fourth aspect of the present invention, a second magnetic levitation compressor is provided.

A fifth aspect of the present invention is to provide an air conditioner.

A sixth aspect of the present invention is to provide a readable storage medium.

In view of the above, according to a first aspect of the present invention, there is provided a bearing detection method for a magnetic levitation compressor, comprising: acquiring a first direction to be calibrated; outputting a first pulse width modulation signal to a driving device of the bearing according to a first direction to be calibrated; acquiring the displacement of a bearing to obtain a first position curve group, wherein the first position curve group comprises a plurality of sampling points; determining the occupation ratio of the sampling points of which the displacement quantity meets the preset deviation condition in a plurality of sampling points; and determining the detection result of the first position curve group according to the comparison result of the ratio and a preset ratio threshold.

The technical scheme of the application provides a bearing detection method, which is used for a magnetic suspension compressor, and the bearing detection method of the magnetic suspension compressor can be used for calibrating the bearing of the magnetic suspension compressor, detecting the calibrated state and ensuring the calibration result.

The technical scheme of the application is realized on the basis of the following principle, specifically, for a selected first direction to be calibrated, the driving device is controlled to operate according to a first pulse width modulation signal corresponding to the first direction to be calibrated, so that the bearing of the magnetic suspension compressor is calibrated under the first pulse width modulation signal, and the displacement of the bearing is acquired, so that the offset which possibly occurs to the bearing at the selected first direction to be calibrated is acquired, and a first position curve group is formed.

Specifically, the displacement of the bearing is collected according to a set sampling frequency, and therefore, the collected first position curve group comprises a plurality of sampling points.

The method comprises the steps of determining sampling points of which the displacement amounts meet a preset deviation condition in a plurality of sampling points, counting the proportion of the sampling points meeting the condition in the plurality of sampling points, and comparing the proportion with a preset proportion threshold value to obtain a detection result of a first position curve group.

In the process, the magnetic suspension compressor can be controlled according to the detection result, so that the failure probability of the magnetic suspension compressor is reduced, and the service life of the magnetic suspension compressor is prolonged.

In one technical solution, the first direction to be calibrated is any one of directions to be calibrated set by a user.

In addition, the detection method of the magnetic suspension compressor provided by the application also has the following accessory technical characteristics.

In the above technical solution, the value of the preset ratio threshold is greater than 85% and less than or equal to 100%.

In one technical scheme, the preset occupancy threshold may be 88%, 90%, or 100%, and the specific value may be set according to an actual usage scenario of the magnetic levitation compressor.

In any of the above technical solutions, determining that the sampling point whose displacement satisfies the preset deviation condition is before the ratio of the plurality of sampling points, further includes: determining a displacement difference value between the displacement corresponding to the first sampling point and a preset displacement; determining the ratio of the displacement difference value to the preset displacement; and determining that the displacement corresponding to the first sampling point meets a preset deviation condition based on the ratio being smaller than a preset ratio, wherein the first sampling point is any one of the plurality of sampling points.

In this technical scheme, it is limited how to judge that the displacement volume that the sampling point corresponds satisfies the preset skew condition, specifically, select any sampling point in a plurality of sampling points as first sampling point, and calculate the displacement volume that first sampling point corresponds and the difference of presetting the displacement volume, in order to obtain the displacement difference, and further calculate the ratio of this displacement difference and presetting the displacement volume, if this ratio is less than and predetermines the ratio, then the displacement volume of the first sampling point of affirmation selection is in reasonable range, consequently, the displacement volume that first sampling point corresponds satisfies the preset skew condition.

And for the condition that the ratio exceeds the preset ratio, the deviation of the bearing suspension center in the first direction to be calibrated is determined to be serious, under the condition that the deviation exists, the magnetic suspension compressor is easy to collide with the protective bearing during operation, the bearing is bent and damaged, and finally the magnetic suspension compressor is in fault.

In one embodiment, the displacement of the first sampling point can be measured by a sensor, such as a sensor measuring the distance between the first sampling point and the bearing as the displacement of the first sampling point.

In any of the above technical solutions, whether the displacement amount corresponding to the first sampling point meets the preset deviation condition or not can be further characterized according to a comparison result between a ratio of the displacement amount corresponding to the first sampling point to the preset displacement amount and a preset numerical value.

Specifically, if the ratio of the displacement amount corresponding to the first sampling point to the preset displacement amount exceeds a preset numerical value, the displacement amount corresponding to the first sampling point is determined not to satisfy a preset deviation condition; if the ratio of the displacement corresponding to the first sampling point to the preset displacement does not exceed a preset value, the displacement corresponding to the first sampling point is determined to meet a preset deviation condition, wherein the preset value can be a value set before the magnetic suspension compressor leaves a factory.

In the technical scheme, a possible judgment scheme is provided to determine whether the displacement corresponding to the first sampling point meets a preset deviation condition so as to meet the requirement that the magnetic suspension compressor is suitable for different use scenes.

In any of the above technical solutions, determining a detection result of the first position curve group according to a comparison result between the duty ratio and a preset duty ratio threshold includes: determining that the first position curve group is qualified in detection based on the ratio not lower than a preset ratio threshold; and determining that the first position curve group is unqualified in detection based on the occupation ratio being lower than a preset occupation ratio threshold value.

In this solution, it is defined how to determine the detection result of the first set of position curves from the comparison between the duty ratio and the preset duty ratio threshold. If the calculated ratio is greater than or equal to the preset ratio threshold, the first position curve group is determined to be qualified for detection, and the ratio of sampling points of the displacement in the first position curve group within a reasonable range is higher according to the value range of the preset ratio threshold recorded above, and at the moment, the failure rate of the magnetic suspension compressor during operation is lower; on the contrary, when the occupation ratio is smaller than the preset occupation ratio threshold value, the lower the occupation ratio of the sampling points of the displacement in the first position curve group in a reasonable range is, at the moment, the higher the failure probability of the magnetic suspension compressor during operation is, and the user can know the calibration result of the magnetic suspension compressor and timely maintain the calibration result by outputting the detection result of the first position curve group, so that the reliability of the magnetic suspension compressor is improved, and meanwhile, the service life of the magnetic suspension compressor is prolonged.

In any of the above technical solutions, the value of the preset ratio is greater than 0% and less than 20%.

In the technical scheme, a value range of the preset ratio is specifically defined, wherein the value of the preset ratio can be 1%, 5%, 10% and the like, and the lower the value is, the lower the possibility that the displacement of the sampling point meets the preset deviation condition is, and correspondingly, the lower the probability that the first position curve group is qualified in detection is. Therefore, under the condition that the first position curve group is detected to be qualified, the lower the probability of failure during the operation of the magnetic suspension compressor is controlled, so that the reliability of the magnetic suspension compressor is improved, and meanwhile, the service life of the magnetic suspension compressor is prolonged.

In any of the above technical solutions, the number of times of detecting that the first position curve group is unqualified is greater than a preset number of times, and a prompt message is output.

In the technical scheme, if the first position curve group is detected for a plurality of times and unqualified, if the unqualified times exceed the preset times, the current calibration result of the magnetic suspension compressor is determined to be not good, the fault risk exists, and the user can maintain the magnetic suspension compressor in time by outputting the reminding information, so that the fault probability in the running process of the magnetic suspension compressor is reduced.

In any of the above technical solutions, the reminding information may be a sound information, such as a continuous beep sound, an intermittent beep sound, or a voice of bearing offset of the magnetic levitation compressor, so that a user can pay attention to a calibration result of the magnetic levitation compressor in time.

In any of the above technical solutions, the reminding information may be light information, such as controlling the light emitting diode to continuously emit red light, or controlling the light emitting diode to intermittently flash, so that a user can pay attention to the calibration result of the magnetic levitation compressor in time.

In any of the above technical solutions, the reminding information may be a combination of sound information and light information.

In any of the above technical solutions, when the first position curve group is detected to be unqualified, calling a stored value, wherein the value is used for representing the number of times that the first position curve group is detected to be unqualified, comparing the value with a preset number of times, and outputting a reminding message if the value is greater than or equal to the preset number of times; and if the numerical value is less than the preset times, adding 1 to the stored numerical value, and storing the changed numerical value so as to be called later.

In any of the above technical solutions, the number of times of the first position curve group being detected as being unqualified is smaller than a preset number of times, and the first pulse width modulation signal is adjusted to obtain an adjusted detection result of the first position curve group.

In the technical scheme, when the number of times of failure is lower than the preset number of times, the first pulse width modulation signal sent to the driving device is regulated, so that the magnetic suspension compressor is recalibrated according to the regulated first pulse width modulation signal.

By performing the calibration again, the influence of abnormal acquisition of data that may exist at the time of the last calibration on the calibration result can be eliminated.

For example, in the last calibration process, the sensor that the user acquires the displacement of the bearing is stuck, the acquired data value is high, and the actual condition of the bearing cannot be truly expressed by the output first position curve group.

In any of the above technical solutions, the adjusting of the first pwm signal sent to the driving device may be adjusting a duty ratio of the first pwm signal.

In any of the above technical solutions, the number of times of detecting the first position curve group as being unqualified is greater than or equal to a preset number of times, and the preset levitation position is used as the levitation position of the bearing.

In the technical scheme, for the condition that the first position curve group obtained after multiple times of calibration is still unqualified, the preset suspension position is used as the suspension position of the bearing, wherein the preset suspension position can be the position set by the magnetic suspension compressor when the magnetic suspension compressor leaves the factory, and the position set by the magnetic suspension compressor when the magnetic suspension compressor leaves the factory is used as the suspension position of the bearing, so that the magnetic suspension compressor is reset, the magnetic suspension compressor is ensured to operate according to the position set by the magnetic suspension compressor when the magnetic suspension compressor leaves the factory, and the operation reliability of the magnetic suspension compressor is ensured in the process.

In any of the above technical solutions, the detection is qualified based on the first position curve group, and the suspension position or the preset suspension position corresponding to the first position curve group is used as the suspension position of the bearing.

In the technical scheme, for the qualified calibration, the suspension position corresponding to the first position curve group can be used as the suspension position of the bearing, and the position set by the magnetic suspension compressor when the magnetic suspension compressor leaves the factory can be used as the suspension position of the bearing, so that the magnetic suspension compressor is reset, the magnetic suspension compressor is ensured to operate according to the position set when the magnetic suspension compressor leaves the factory, and the operation reliability of the magnetic suspension compressor is ensured in the process.

In any of the above technical solutions, after acquiring the displacement of the bearing and obtaining the first position curve group, the method further includes: determining detection results of all directions to be calibrated; and repeating the detection until the detection results of all the directions to be calibrated are obtained based on the fact that all the directions to be calibrated are not detected.

In the technical scheme, after the calibration of the first direction to be calibrated is finished, other directions to be calibrated need to be calibrated, in order to determine whether there is any direction which is not calibrated, the technical scheme of the application obtains detection results of all directions to be calibrated, and if there is a direction which is not calibrated, the directions which are not calibrated are calibrated until all directions to be calibrated are calibrated.

Through calibrating all directions to be calibrated, the risks possibly encountered during the operation of the magnetic suspension compressor can be comprehensively known, the situation that the calibration is not qualified is timely maintained, the probability of failure during the operation of magnetic suspension click operation with failure risks is reduced, and the operation reliability of the magnetic suspension compressor is improved.

In a second aspect of the present invention, there is provided a bearing detecting apparatus for a magnetic levitation compressor, comprising: the acquiring unit is used for acquiring a first direction to be calibrated; the control unit is used for outputting a first pulse width modulation signal to a driving device of the bearing according to a first direction to be calibrated; the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring the displacement of a bearing to obtain a first position curve group, and the first position curve group comprises a plurality of sampling points; the determining unit is used for determining the occupation ratio of the sampling points of which the displacement quantity meets the preset deviation condition in the plurality of sampling points; and determining the detection result of the first position curve group according to the comparison result of the ratio and a preset ratio threshold.

The technical scheme of the application provides a bearing detection device for a magnetic suspension compressor, and the bearing detection method of the magnetic suspension compressor can realize the calibration of the bearing of the magnetic suspension compressor, detect the state after the calibration and ensure the calibration result.

The technical scheme of the application is realized on the basis of the following principle, specifically, for a selected first direction to be calibrated, the driving device is controlled to operate according to a first pulse width modulation signal corresponding to the first direction to be calibrated, so that the magnetic suspension compressor is calibrated under the first pulse width modulation signal, and displacement of the bearing is acquired, so that offset which may occur to the bearing at the selected first direction to be calibrated is acquired, and a first position curve group is formed.

In any of the above technical solutions, the determining unit is further configured to determine that the sampling point whose displacement amount satisfies the preset deviation condition is before the ratio of the plurality of sampling points: determining a displacement difference value between the displacement corresponding to the first sampling point and a preset displacement; determining the ratio of the displacement difference value to the preset displacement; and determining that the displacement corresponding to the first sampling point meets a preset deviation condition based on the ratio being smaller than a preset ratio, wherein the first sampling point is any one of the plurality of sampling points.

In any of the above technical solutions, the determining unit is configured to include: determining that the first position curve group is qualified in detection based on the ratio not lower than a preset ratio threshold; and determining that the first position curve group is unqualified in detection based on the occupation ratio being lower than a preset occupation ratio threshold value.

In any of the above technical solutions, the determining unit is further configured to output the reminding information based on that the number of times that the first position curve group is detected to be unqualified is greater than a preset number of times.

In any of the above technical solutions, the determining unit is further configured to adjust the first pwm signal based on that the number of times that the first position curve group is detected to be unqualified is smaller than a preset number of times, so as to obtain an adjusted detection result of the first position curve group.

In any of the above technical solutions, the determining unit is further configured to detect, based on the first position curve group, that the number of times of failure is greater than or equal to a preset number of times, and use the preset levitation position as the levitation position of the bearing.

In any of the above technical solutions, the determining unit is further configured to determine that the first position curve group is qualified through detection, and use a levitation position or a preset levitation position corresponding to the first position curve group as a levitation position of the bearing.

In any of the above technical solutions, the determining unit is further configured to determine detection results of all directions to be calibrated; and repeating the detection until the detection results of all the directions to be calibrated are obtained based on the fact that all the directions to be calibrated are not detected.

In a third aspect of the present invention, there is provided a magnetic levitation compressor comprising: the bearing detection device of the magnetic suspension compressor is disclosed.

In a fourth aspect of the present invention, there is provided a magnetic levitation compressor comprising: a bearing; the protective bearing is sleeved on the bearing; the detection devices are arranged along the circumferential direction and/or the axial direction of the protective bearing and are used for acquiring the displacement of the bearing; and the control device is connected with at least one group of detection devices and is used for realizing the steps of the bearing detection method of the magnetic suspension compressor.

In a fifth aspect of the present invention, an air conditioner is provided, which comprises the above magnetic levitation compressor.

A sixth aspect of the present invention is to provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor, implement the steps of the bearing detection method of a magnetic levitation compressor as in any one of the above.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic flow diagram of a bearing detection method of a magnetic levitation compressor in an embodiment of the present invention;

fig. 2 is a schematic flow chart showing the ratio of the number of sampling points in which the amount of displacement satisfies the preset deviation condition among a plurality of sampling points in the embodiment of the present invention;

fig. 3 shows a schematic block diagram of a bearing detection arrangement of a magnetic levitation compressor in an embodiment of the present invention;

figure 4 shows a schematic block diagram of a magnetic levitation compressor in an embodiment of the present invention;

FIG. 5 shows one of the detection schematics of a magnetically levitated compressor in an embodiment of the present invention;

FIG. 6 shows a second schematic view of the detection of a magnetically levitated compressor in an embodiment of the present invention;

FIG. 7 shows a third schematic diagram of the detection of a magnetically levitated compressor in an embodiment of the present invention;

FIG. 8 shows a fourth inspection schematic of a magnetically levitated compressor in an embodiment of the present invention;

fig. 9 shows a schematic structural view of a magnetic levitation compressor in an embodiment of the present invention;

FIG. 10 shows the radial trajectory of the bearing as measured by probe 1, probe 2, probe 3 and probe 4 in an embodiment of the invention;

FIG. 11 shows the axial trajectory of the bearing as determined by the probe 9 of the present invention;

fig. 12 shows a flow chart of the bearing detection method of the magnetic levitation compressor of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 5 to 9 is:

bearing 502 protects bearing 504.

Detailed Description

So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Example one

As shown in fig. 1, according to a first aspect of the present invention, there is provided a bearing detecting method of a magnetic levitation compressor, comprising:

102, acquiring a first direction to be calibrated;

104, outputting a first pulse width modulation signal matched with a first direction to be calibrated to a driving device of the bearing;

step 106, acquiring the displacement of a bearing of the magnetic suspension compressor to obtain a first position curve group;

step 108, determining the proportion of the number of the sampling points of which the displacement meets the preset deviation condition in a plurality of sampling points;

and step 110, comparing the ratio with a preset ratio threshold value, and determining the detection result of the first position curve group according to the comparison result.

Wherein the first position curve group comprises a plurality of sampling points.

The embodiment of the application provides a bearing detection method, which is used for a magnetic suspension compressor, and by applying the bearing detection method of the magnetic suspension compressor, the bearing of the magnetic suspension compressor can be calibrated, the calibrated state is detected, and the calibration result is ensured.

The embodiment of the application is realized on the basis of the principle that, specifically, for a selected first direction to be calibrated, the driving device is controlled to operate according to a first pulse width modulation signal corresponding to the first direction to be calibrated, so that the magnetic suspension compressor is calibrated under the first pulse width modulation signal, and the displacement of the bearing is acquired so as to acquire the possible offset of the bearing at the selected first direction to be calibrated, so as to form a first position curve group.

In one embodiment, the first direction to be calibrated is any one of the directions to be calibrated set by the user.

Example two

In one embodiment, comparing the ratio with a preset ratio threshold and determining the detection result of the first position curve group according to the comparison result includes: if the occupancy ratio is higher than a preset occupancy ratio threshold, judging that the first position curve group detection is qualified; and if the occupation ratio is less than or equal to the preset occupation ratio threshold value, judging that the detection of the first position curve group is unqualified.

In this embodiment it is defined how the detection result of the first set of position curves is determined on the basis of the comparison between the duty ratio and a preset duty ratio threshold. If the calculated ratio is greater than or equal to the preset ratio threshold, the first position curve group is determined to be qualified for detection, and the ratio of sampling points of the displacement in the first position curve group within a reasonable range is higher according to the value range of the preset ratio threshold recorded above, and at the moment, the failure rate of the magnetic suspension compressor during operation is lower; on the contrary, when the occupation ratio is smaller than the preset occupation ratio threshold value, the lower the occupation ratio of the sampling points of the displacement in the first position curve group in a reasonable range is, at the moment, the higher the failure probability of the magnetic suspension compressor during operation is, and the user can know the calibration result of the magnetic suspension compressor and timely maintain the calibration result by outputting the detection result of the first position curve group, so that the reliability of the magnetic suspension compressor is improved, and meanwhile, the service life of the magnetic suspension compressor is prolonged.

In the above embodiment, any value of the preset duty threshold is greater than 85% and less than or equal to 100%.

In this embodiment, a possible value range of the preset percentage threshold is specifically defined, in one embodiment, the preset percentage threshold may be 88%, or 90%, or 100%, and a specific value thereof may be set according to an actual usage scenario of the magnetic levitation compressor.

EXAMPLE III

In any of the above embodiments, as shown in fig. 2, determining the proportion of the number of sampling points for which the displacement amount satisfies the preset deviation condition among the plurality of sampling points further includes:

step 202, selecting any one of the plurality of sampling points as a first sampling point, and calculating a displacement difference value between a displacement amount corresponding to the first sampling point and a preset displacement amount, wherein the preset displacement amount corresponds to the first sampling point;

step 204, calculating the ratio of the displacement difference value to a preset displacement;

in step 206, if the ratio is lower than the predetermined ratio, it is determined that the displacement corresponding to the first sampling point satisfies the predetermined deviation condition.

In this embodiment, how to determine that the displacement amount corresponding to the sampling point satisfies the preset deviation condition is defined, specifically, any one of the plurality of sampling points is selected as the first sampling point, and a difference between the displacement amount corresponding to the first sampling point and the preset displacement amount is calculated to obtain a displacement difference value, and a ratio of the displacement difference value to the preset displacement amount is further calculated.

In any of the above embodiments, whether the displacement amount corresponding to the first sampling point meets the preset deviation condition may be further characterized according to a comparison result between a ratio of the displacement amount corresponding to the first sampling point to the preset displacement amount and a preset numerical value.

In this embodiment, a possible determination scheme is proposed to determine whether the displacement corresponding to the first sampling point satisfies a preset deviation condition, so as to satisfy that the magnetic levitation compressor is suitable for different usage scenarios.

In any of the above embodiments, the value range of the predetermined ratio is (0%, 20%).

In this embodiment, a value range of the preset ratio is specifically defined, where the value of the preset ratio may be 1%, 5%, 10%, and the like, and the lower the value is, the lower the possibility that the displacement of the sampling point satisfies the preset deviation condition is, the lower the probability that the first position curve group is qualified in detection is. Therefore, under the condition that the first position curve group is detected to be qualified, the lower the probability of failure during the operation of the magnetic suspension compressor is controlled, so that the reliability of the magnetic suspension compressor is improved, and meanwhile, the service life of the magnetic suspension compressor is prolonged.

Example four

In any of the above embodiments, when the number of times that the detection result of the first position curve group is unqualified is greater than the preset number of times, the reminding information is output.

In this embodiment, if the first position curve group has a condition that the detection is not qualified for multiple times, if the number of times of the detection is greater than the preset number of times, the current calibration result of the magnetic levitation compressor is determined to be not good, and a fault risk exists.

In any of the above embodiments, the reminding message may be a sound message, such as a continuous beep sound, an intermittent beep sound, or a voice of bearing offset of the magnetic levitation compressor, so that the user can pay attention to the calibration result of the magnetic levitation compressor in time.

In any of the above embodiments, the reminding information may be light information, such as controlling the light emitting diode to continuously emit red light, or controlling the light emitting diode to intermittently flash, so that a user can pay attention to the calibration result of the magnetic levitation compressor in time.

In any of the above embodiments, the reminder information may be a combination of sound information and light information.

In any of the above embodiments, when the first position curve group is detected to be unqualified, calling a stored value, where the value is used to represent the number of times that the first position curve group is detected to be unqualified, comparing the value with a preset number of times, and if the value is greater than or equal to the preset number of times, outputting a prompt message; and if the numerical value is less than the preset times, adding 1 to the stored numerical value, and storing the changed numerical value so as to be called later.

In any of the above embodiments, when the number of times that the detection of the first position curve group is not qualified is smaller than the preset number of times, the first pwm signal is adjusted to obtain the adjusted detection result of the first position curve group.

In this embodiment, it is defined that, when the number of failures is lower than the preset number, the first pwm signal sent to the driving device is adjusted, so as to recalibrate the magnetic levitation compressor according to the adjusted first pwm signal.

In any of the above embodiments, adjusting the first pwm signal to be sent to the driving device may be adjusting a duty ratio of the first pwm signal.

In any of the embodiments described above, when the number of times that the detection result of the first position curve group is not qualified is greater than or equal to the preset number of times, the preset levitation position is used as the levitation position of the bearing.

In this embodiment, for the case that the first position curve group determined after the multiple calibrations is still not qualified, the preset levitation position is used as the levitation position of the bearing, where the preset levitation position may be a position set by the magnetic levitation compressor when the magnetic levitation compressor leaves the factory, and the position set by the magnetic levitation compressor when the magnetic levitation compressor leaves the factory is used as the levitation position of the bearing, so as to achieve the resetting of the magnetic levitation compressor, so as to ensure that the magnetic levitation compressor operates according to the position set when the magnetic levitation compressor leaves the factory, and in this process, the reliability of the operation of the magnetic levitation compressor is ensured.

In any of the embodiments described above, when the detection result of the first position curve group is qualified, the levitation position or the preset levitation position corresponding to the first position curve group is used as the levitation position of the bearing.

In this embodiment, for the case of qualified calibration, the levitation position corresponding to the first position curve group may be used as the levitation position of the bearing, or a position set by the magnetic levitation compressor when the magnetic levitation compressor is shipped from a factory may be used as the levitation position of the bearing, so as to achieve resetting of the magnetic levitation compressor, so as to ensure that the magnetic levitation compressor operates according to the position set when the magnetic levitation compressor is shipped from the factory, and in this process, the reliability of operation of the magnetic levitation compressor is ensured.

In any of the above embodiments, after acquiring the displacement of the bearing of the magnetic levitation compressor and obtaining the first position curve set, the method further includes: obtaining detection results of all directions to be calibrated; and under the condition that the uncalibrated direction exists in all the directions to be calibrated, repeatedly detecting until the detection results of all the directions to be calibrated are obtained.

In this embodiment, after the calibration of the first direction to be calibrated is finished, calibration of other directions to be calibrated is also required, in order to determine whether there is any direction that is not calibrated, in the embodiment of the present application, a detection result of all directions to be calibrated is obtained, and if there is a direction that is not calibrated, the directions that are not calibrated are calibrated until all the directions to be calibrated are calibrated.

EXAMPLE five

In one embodiment, as shown in fig. 3, there is provided a bearing detecting apparatus 300 of a magnetic levitation compressor, including: an obtaining unit 302, configured to obtain a first direction to be calibrated; a control unit 304, configured to output a first pulse width modulation signal matching the first direction to be calibrated to a driving apparatus of the bearing; the acquisition unit 306 is used for acquiring the displacement of a bearing of the magnetic suspension compressor to obtain a first position curve group, wherein the first position curve group comprises a plurality of sampling points; a determining unit 308 for determining a ratio of the number of sampling points for which the displacement amount satisfies a preset deviation condition among the plurality of sampling points; and comparing the ratio with a preset ratio threshold value, and determining the detection result of the first position curve group according to the comparison result.

The embodiment of the application provides a bearing detection device, which is used for a magnetic suspension compressor, and the bearing detection method of the magnetic suspension compressor can calibrate the bearing of the magnetic suspension compressor, detect the calibrated state and ensure the calibrated result.

In any of the above embodiments, determining a ratio of the number of sampling points for which the displacement amount satisfies the preset deviation condition among the plurality of sampling points, the determining unit 308 is further configured to: calculating a displacement difference value between a displacement corresponding to a first sampling point and a preset displacement, wherein the preset displacement corresponds to the first sampling point; calculating the ratio of the displacement difference value to a preset displacement; if the ratio is lower than the preset ratio, the displacement corresponding to the first sampling point is judged to meet the preset deviation condition.

In any of the above embodiments, the determining unit 308 is configured to include: if the occupancy ratio is higher than a preset occupancy ratio threshold, judging that the first position curve group detection is qualified; and if the occupation ratio is less than or equal to the preset occupation ratio threshold value, judging that the detection of the first position curve group is unqualified.

In any of the above embodiments, the determining unit 308 is further configured to adjust the first pwm signal to obtain an adjusted detection result of the first position curve group when the number of times that the detection of the first position curve group is failed is less than a preset number of times.

In any of the above embodiments, the determining unit 308 is further configured to use the preset levitation position as the levitation position of the bearing when the number of times that the detection result of the first position curve group is not qualified is greater than or equal to the preset number of times.

In any of the above embodiments, the determining unit 308 is further configured to, when the detection result of the first position curve group is qualified, use the levitation position or the preset levitation position corresponding to the first position curve group as the levitation position of the bearing.

In any of the above embodiments, the determining unit 308 is further configured to obtain detection results of all directions to be calibrated; and under the condition that the uncalibrated direction exists in all the directions to be calibrated, repeatedly detecting until the detection results of all the directions to be calibrated are obtained.

EXAMPLE six

In one embodiment, as shown in fig. 4, there is provided a magnetic levitation compressor 400 comprising: the bearing detection device 300 of the magnetic suspension compressor is described above.

The embodiment of the application provides a magnetic suspension compressor 400, wherein the magnetic suspension compressor 400 comprises the bearing detection device 300 of the magnetic suspension compressor, and the bearing detection device of the magnetic suspension compressor is applied to calibrate the bearing of the magnetic suspension compressor, detect the calibrated state and ensure the calibrated result.

The embodiments of the present application are based on the principle that, in particular, for a selected first direction to be calibrated, the drive device is controlled to operate in accordance with a signal corresponding to the first direction to be calibrated in order to calibrate the magnetic levitation compressor under the signal, and by detecting the displacement of the bearing, the offset that may occur in the bearing in the selected first direction to be calibrated is detected in order to form a first position curve set.

The method comprises the steps of determining sampling points of which the displacement amounts meet a preset deviation condition in a plurality of sampling points, counting the proportion of the sampling points meeting the condition in the plurality of sampling points, and comparing the proportion with a preset proportion threshold value to obtain a detection result.

EXAMPLE seven

In one embodiment, as shown in fig. 5, there is provided a magnetic levitation compressor including: a bearing 502; a protective bearing 504 sleeved on the bearing 502; at least one group of detection devices arranged along the circumferential direction and/or the axial direction of the protective bearing 504 and used for acquiring the displacement of the bearing 502; control means (not shown in the figures) connected to at least one set of detection means for carrying out the steps of the method for detecting the bearing 502 of a magnetic levitation compressor as described in any one of the preceding claims.

The embodiment of the application provides a magnetic suspension compressor, wherein the magnetic suspension compressor can calibrate a bearing of the magnetic suspension compressor, and detect the state after calibration, ensure the result of calibration, in this process, can realize automatic adjustment under the condition that skew appears in the bearing suspension center, reduce the magnetic suspension compressor because of the bearing suspension center appears the risk that the skew and damage.

The embodiments of the present application are based on the principle that, in particular, for a selected first direction to be calibrated, the drive device is controlled to operate in accordance with a signal corresponding to the first direction to be calibrated in order to calibrate the bearing of the magnetic levitation compressor under the signal, and by detecting the displacement of the bearing, the possible offset of the bearing in the selected first direction to be calibrated is detected in order to form a first position curve set.

Specifically, in the case where the number of the detecting means is two, the detecting means includes the probe 1, the probe 2, the probe 3, and the probe 4.

In one embodiment, in the case that the directions to be calibrated are the directions of the probe 1, the probe 2, the probe 3, and the probe 4, respectively, the directions of the probe 1, the probe 2, the probe 3, and the probe 4 are calibrated, respectively, as shown in fig. 5, a first position curve group is obtained in the direction corresponding to the probe 1; as shown in fig. 6, a second position curve group is obtained in the direction corresponding to the probe 2; as shown in fig. 7, a third position curve group is obtained in the direction corresponding to the probe 3; as shown in fig. 8, a fourth set of position curves is obtained in the direction corresponding to the probe 4.

In one embodiment, as shown in fig. 9, in the case that the protection bearing 504 is divided into a front protection bearing 504 and a rear protection bearing 504, the detection device further includes a probe 5, a probe 6, a probe 7, and a probe 8, and a probe 9 located in the axial direction of the bearing 502, in this case, each position curve group includes two degrees of freedom in the radial direction of the bearing 502 (where each degree of freedom is composed of two probes facing each other) and a degree of freedom in movement in the circumferential direction of the bearing 502.

Fig. 10 shows the radial trajectory of the bearing 502 measured by the probe 1, the probe 2, the probe 3 and the probe 4, and fig. 11 shows the axial trajectory of the bearing 502 measured by the probe 9.

Fig. 12 is a schematic flow chart illustrating a bearing detection method of a magnetic levitation compressor according to an embodiment of the present invention, and as shown in fig. 12, the bearing detection method of the magnetic levitation compressor includes:

step 1202, starting bearing calibration;

step 1204, changing a driving duty ratio of each driving device;

step 1206, calculating the maximum value and the minimum value of the displacement of each degree of freedom;

step 1208, judging whether the current angle is calibrated, if so, executing step 1210, and if not, executing step 1204;

step 1210, recording calibration data;

step 1212, determining whether all the angles are calibrated, if so, executing step 1214, and if not, executing step 1202;

step 1214, data diagnosis;

step 1216, determining whether the suspension position of the bearing needs to be adjusted, if yes, executing step 1218, and if no, executing step 1220;

step 1218, adjusting the suspension position;

and step 1220, adopting a factory suspension position.

In the embodiment, the bearing detection method of the magnetic suspension compressor can be used for calibrating the magnetic suspension compressor, detecting the calibrated state and ensuring the calibration result, and in the process, the bearing can be automatically adjusted under the condition that the bearing is deviated, so that the risk that the magnetic suspension compressor is damaged due to the deviation of the bearing is reduced.

Example eight

In one embodiment, an air conditioner is provided, and comprises the magnetic levitation compressor.

In this embodiment, the proposed air conditioner has the above-mentioned magnetic levitation compressor, so has all the beneficial technical effects of the above-mentioned magnetic levitation compressor.

The embodiment of the application provides an air conditioner, wherein, the air conditioner includes as above-mentioned magnetic suspension compressor, can realize calibrating the bearing of magnetic suspension compressor to the state after the calibration detects, ensures the result of calibration, and at this in-process, can realize automatic adjustment under the condition that skew appears in bearing suspension center, reduces the magnetic suspension compressor and appear the risk that the skew appears and damage because of the bearing suspension center.

Example nine

In one embodiment, a readable storage medium is provided, on which a program or instructions are stored, which when executed by a processor implement the steps of the bearing detection method of a magnetic levitation compressor as defined in any one of the above.

In the embodiment, the provided readable storage medium can calibrate the magnetic suspension compressor, detect the calibrated state and ensure the result of calibration, and in the process, the automatic adjustment can be realized under the condition that the suspension center of the bearing deviates, so that the risk that the magnetic suspension compressor is damaged due to the deviation of the suspension center of the bearing is reduced.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 present invention. In the present invention, 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bearing detection method of a magnetic suspension compressor is characterized by comprising the following steps:

acquiring a first direction to be calibrated;

outputting a first pulse width modulation signal to a driving device of the bearing according to the first direction to be calibrated;

acquiring the displacement of the bearing to obtain a first position curve group, wherein the first position curve group comprises a plurality of sampling points;

determining the occupation ratio of the sampling points of which the displacement quantity meets a preset deviation condition in the plurality of sampling points;

and determining the detection result of the first position curve group according to the comparison result of the ratio and a preset ratio threshold.

2. The method for detecting the bearing of the magnetic levitation compressor as recited in claim 1, wherein the preset duty threshold value is greater than 85% and less than or equal to 100%.

3. The method for detecting the bearing of the magnetic levitation compressor as recited in claim 1, wherein the step of determining that the displacement satisfies the preset deviation condition is performed before the ratio of the plurality of sampling points, further comprises:

determining a displacement difference value between the displacement corresponding to the first sampling point and a preset displacement;

determining the ratio of the displacement difference value to a preset displacement;

and determining that the displacement corresponding to the first sampling point meets a preset deviation condition based on the ratio being smaller than a preset ratio, wherein the first sampling point is any one of the plurality of sampling points.

4. The bearing detection method of a magnetic levitation compressor as recited in any one of claims 1 to 3, wherein determining the detection result of the first position curve group according to the comparison result of the ratio with a preset ratio threshold comprises:

determining that the first position curve group is qualified for detection based on the ratio not being lower than the preset ratio threshold;

and determining that the first position curve group is unqualified in detection based on the occupation ratio being lower than the preset occupation ratio threshold.

5. The method for detecting the bearing of the magnetic levitation compressor as recited in claim 3, wherein the value of the preset ratio is greater than 0% and less than 20%.

6. The bearing detection method of a magnetic levitation compressor as recited in claim 4,

and outputting reminding information when the times of detecting the first position curve group to be unqualified are larger than the preset times.

7. The bearing detection method of a magnetic levitation compressor as recited in claim 4,

and adjusting the first pulse width modulation signal based on the fact that the times of unqualified detection of the first position curve group are less than the preset times so as to obtain the adjusted detection result of the first position curve group.

8. The bearing detection method of a magnetic levitation compressor as recited in claim 4,

and the times of detecting the unqualified first position curve group are greater than or equal to the preset times, and the preset suspension position is used as the suspension position of the bearing.

9. The bearing detection method of a magnetic levitation compressor as recited in claim 4,

and based on the first position curve group, determining that the detection is qualified, and taking the suspension position corresponding to the first position curve group or a preset suspension position as the suspension position of the bearing.

10. The bearing detection method of the magnetic levitation compressor as recited in any one of claims 1 to 3, further comprising:

determining detection results of all directions to be calibrated;

and repeating the detection until the detection results of all the directions to be calibrated are obtained based on the fact that all the directions to be calibrated are not detected.

11. A bearing detection device of a magnetic suspension compressor is characterized by comprising:

the acquiring unit is used for acquiring a first direction to be calibrated;

the control unit is used for outputting a first pulse width modulation signal to a driving device of the bearing according to the first direction to be calibrated;

the device comprises a collecting unit, a processing unit and a control unit, wherein the collecting unit is used for collecting the displacement of the bearing to obtain a first position curve group, and the first position curve group comprises a plurality of sampling points;

a determination unit configured to determine a ratio of the sampling points at which the displacement amount satisfies a preset deviation condition to the plurality of sampling points; and

12. A magnetically levitated compressor, comprising:

bearing detection device of a magnetic levitation compressor as claimed in claim 11.

13. A magnetically levitated compressor, comprising:

a bearing;

the protective bearing is sleeved on the bearing;

the detection devices are arranged along the circumferential direction and/or the axial direction of the protection bearing and are used for acquiring the displacement of the bearing;

control means, connected to said at least one set of detection means, for carrying out the steps of the method for detecting the bearing of a magnetic levitation compressor as claimed in any one of claims 1 to 10.

14. An air conditioner, comprising:

the magnetic levitation compressor as recited in claim 13.

15. A readable storage medium on which a program or instructions are stored, characterized in that said program or instructions, when executed by a processor, carry out the steps of the bearing detection method of a magnetic levitation compressor as claimed in any one of claims 1 to 10.