CN114412771B - Compressor overload test method and system - Google Patents
Compressor overload test method and system Download PDFInfo
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- CN114412771B CN114412771B CN202111494016.9A CN202111494016A CN114412771B CN 114412771 B CN114412771 B CN 114412771B CN 202111494016 A CN202111494016 A CN 202111494016A CN 114412771 B CN114412771 B CN 114412771B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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Abstract
The application relates to a compressor overload test method and system. The method comprises the following steps: acquiring working condition test parameters of the compressor, and adding the working condition test parameters into a current working condition test parameter data set; boosting the operation voltage to enable the compressor to operate at the updated operation voltage, specifically: the power supply voltage is regulated to the updated operating voltage, and then the current operating voltage is obtained; judging whether the current operating voltage is equal to the updated operating voltage, if not, regulating the power supply voltage to correct the operating voltage, and then re-executing the step of obtaining the current operating voltage until the current operating voltage is equal to the updated operating voltage; and judging whether the updated running voltage reaches the target test voltage, if so, judging the stability of the working condition based on the current working condition test parameter data set to obtain an overload test result. The scheme provided by the application can avoid the deviation of the working condition test parameters introduced in the voltage regulation process and ensure the reliability of the overload test result of the compressor.
Description
Technical Field
The application relates to the technical field of compressors, in particular to a compressor overload test method and system.
Background
At present, the frequency conversion technology of the refrigerator and the air conditioner has been widely applied, and the ultra-low frequency starting is adopted, so that the pollution to a power grid can be reduced, and the energy consumption can be reduced.
The variable frequency compressor is tested before leaving the factory, the variable frequency compressor is mainly tested by the whole machine after being installed into the whole machine, and the running condition of the compressor is detected after power-on running. According to the overload test system for the compressor in the industry, the tested Cheng Quancheng needs to be manually followed to process and record data, the test environment is bad, the labor intensity is high, subjective judgment errors are easily introduced in the manual judgment process, and the judgment of the test data is invalid.
In the related art, patent document with publication number CN101498297B discloses a continuous overload test system for a refrigeration compressor, which adjusts a contact voltage regulator by rotating a stepping motor, so that the compressor works at different working voltages, and then the continuous overload operation test is divided into three test stages according to the working voltages to collect exhaust pressure, suction temperature and compressor environmental chamber temperature, and the three stages are compared with preset values respectively to control working conditions and test overload for the compressor.
In the scheme, the working voltages of the three test stages are 1.06 times, 0.96 times and 0.85 times of rated voltage respectively, the working voltage adjusting process of the test stages is in jump type adjustment, the adjusting amplitude is large, the working condition of the compressor is influenced by the change of the power supply voltage, fluctuation occurs, the collected working condition test parameters generate deviation, and the deviation is derived from the change of the power supply voltage and is not caused by unstable running state of the compressor, so that the accuracy of the overload test result of the compressor is influenced; and jump adjustments can affect the accuracy of the voltage adjustment.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides a compressor overload test method and a system, which can avoid the deviation of working condition test parameters introduced in the voltage regulation process and ensure the reliability of the compressor overload test result.
The first aspect of the application provides a compressor overload test method, comprising the following steps:
acquiring working condition test parameters of the compressor, and adding the working condition test parameters into a current working condition test parameter data set;
boosting the operation voltage to enable the compressor to operate at the updated operation voltage, specifically: adjusting the power supply voltage to the updated operating voltage and then obtaining the current operating voltage; judging whether the current operating voltage is equal to the updated operating voltage, if not, adjusting the power supply voltage to the corrected operating voltage, and then re-executing the step of obtaining the current operating voltage until the current operating voltage is equal to the updated operating voltage; the corrected operating voltage is the ratio of the updated operating voltage to the current operating voltage after squaring; the updated operating voltage is the sum of the operating voltage and voltage regulation precision;
and judging whether the updated running voltage reaches a target test voltage, if so, judging the stability of the working condition based on the current working condition test parameter data set to obtain an overload test result.
In one embodiment, the operating condition test parameters include: suction pressure, discharge pressure, suction temperature, and ambient temperature; the working condition test parameter data set comprises: an intake pressure data set, an exhaust pressure data set, an intake temperature data set, and an ambient temperature data set;
the working condition stability judgment is carried out based on the current working condition test parameter data set to obtain an overload test result, and the method comprises the following steps:
and respectively carrying out working condition variability judgment, working condition consistency judgment and working condition consistency judgment based on the current working condition test parameter data set, and if one judgment result among the working condition variability judgment, the working condition consistency judgment and the working condition consistency judgment is unqualified, judging that the overload test result is unqualified.
In one embodiment, the determining of the operating condition variability, the determining of the operating condition compliance, and the determining of the operating condition compliance based on the current operating condition test parameter data set, respectively, includes:
judging whether the working condition test parameter data meet the working condition variability qualification conditions, if so, judging that the working condition variability judgment result is qualified; if not, the result of the working condition variability judgment is unqualified;
the working condition mutation qualification condition comprises: the range of the inspiratory pressure dataset is less than an inspiratory pressure range threshold, the range of the expiratory pressure dataset is less than an expiratory pressure range threshold, the range of the inspiratory temperature dataset is less than an inspiratory temperature range threshold, and the range of the ambient temperature dataset is less than an ambient temperature range threshold.
In one embodiment, the determining of the operating condition variability, the determining of the operating condition compliance, and the determining of the operating condition compliance are performed based on the current operating condition test parameter data set, respectively, where the determining of the operating condition compliance includes:
judging whether the current working condition test parameter data meets the working condition compliance qualification conditions, if so, judging that the working condition compliance judgment result is qualified; if not, the result of the condition conformity judgment is disqualification;
the working condition compliance qualification condition comprises: the error of each air suction pressure in the air suction pressure data set and the error of the preset air suction pressure are smaller than an air suction pressure error threshold, the error of each air discharge pressure in the air discharge pressure data set and the error of the preset air discharge pressure are smaller than an air discharge pressure error threshold, the error of each air suction temperature in the air suction temperature data set and the error of the preset air suction temperature are smaller than an air suction temperature error threshold, and the error of each ambient temperature in the ambient temperature data set and the error of the preset ambient temperature are smaller than an ambient temperature error threshold.
In one embodiment, the determining of the operating condition variability, the determining of the operating condition compliance, and the determining of the operating condition compliance are performed based on the current operating condition test parameter data set, respectively, where the determining of the operating condition compliance includes:
judging whether the working condition test parameter data meet the working condition consistency qualification conditions, if so, judging that the working condition consistency judgment result is qualified; if not, the result of the working condition consistency judgment is disqualification;
the condition consistency qualification condition comprises: the standard deviation of the inspiratory pressure dataset is less than an inspiratory pressure standard deviation threshold, the standard deviation of the expiratory pressure dataset is less than an expiratory pressure standard deviation threshold, the standard deviation of the inspiratory temperature dataset is less than an inspiratory temperature standard deviation threshold, and the standard deviation of the ambient temperature dataset is less than an ambient temperature standard deviation threshold.
In one embodiment, after the determining whether the current operating voltage is equal to the updated operating voltage, the method further includes:
and if the current running voltage is equal to the updated running voltage, controlling the compressor to run for a preset running time with the updated running voltage, and then executing the step of judging whether the updated running voltage reaches a target test voltage.
In one embodiment, the compressor overload test method further comprises:
acquiring a first operation current, a second operation current and a third operation current of the compressor;
judging whether the compressor is in a closed state or not based on the first operation current, the second operation current and the third operation current, and if so, controlling the compressor to stop; if not, executing the step of acquiring the first operation current, the second operation current and the third operation current of the compressor until the compressor is in a closed state or an overload test result is obtained;
and the acquisition moments of the first operation current, the second operation current and the third operation current are sequentially separated by one current scanning period.
In one embodiment, the determining whether the compressor is in a closed state based on the first operating current, the second operating current, and the third operating current includes:
calculating the absolute value of the difference value between the first operation current and the second operation current to obtain a first current change value;
calculating the absolute value of the difference value of the second operation current and the third operation current to obtain a second current change value;
and judging whether the absolute value of the difference value of the first current change value and the second current change value is larger than a current change value threshold value or not.
A second aspect of the present application provides a compressor overload test system for performing the compressor overload test method according to any one of the preceding claims, comprising:
the test device comprises a variable frequency power supply, test equipment, a memory and a processor;
the variable frequency power supply is used for providing operation voltage for the compressor;
the test equipment is connected with the memory and is used for acquiring working condition test parameters of the compressor and operating voltage of the compressor and sending the working condition test parameters and the operating voltage to the memory;
the variable frequency power supply, the testing equipment and the memory are respectively connected with the processor, the processor controls the variable frequency power supply to output different power supply voltages, controls the testing equipment to execute the actions of acquiring working condition testing parameters of the compressor and operating voltage of the compressor, and judges and obtains an overload testing result based on data in the memory.
The technical scheme provided by the application can comprise the following beneficial effects:
the application uses voltage regulation precision as gradient to step up the operation voltage of the compressor, and collects the working condition test parameters of the compressor under each different operation voltage to form a working condition test parameter data set of the compressor, and detects the operation condition stability of the compressor based on the working condition test parameter data set to obtain the overload test result.
In the process of adjusting the operating voltage, the power supply voltage is firstly adjusted to be the target operating voltage, namely the updated operating voltage, then the current operating voltage is detected, when the current operating voltage is detected to be inconsistent with the updated operating voltage, the current operating voltage is used as voltage adjustment feedback to correct the power supply voltage, and the current operating voltage is detected after the corrected operating voltage is used as the power supply voltage until the current operating voltage accords with the target operating voltage, namely the updated operating voltage. Through the automatic smooth feedback adjustment, the voltage is continuously close to the target test voltage by taking the voltage adjustment precision as a gradient every time, the smoothness of the operation voltage adjustment process is ensured, the current operation voltage and the updated operation voltage are compared during every time adjustment, the control is continuously compensated, the voltage is slowly and smoothly adjusted to be close to the target test voltage through closed loop feedback, the deviation of the working condition test parameters introduced during the voltage adjustment process is avoided, and the reliability of the overload test result of the compressor is influenced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a flow chart of a compressor overload test method according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a condition stability determination according to an embodiment of the present application;
FIG. 3 is a flow chart of a method of stuffy machine testing according to an embodiment of the present application;
fig. 4 is a schematic structural view of a compressor overload test system according to an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Example 1
In the scheme with the publication number of CN101498297B, the working voltage adjusting process is in jump type adjustment, the adjusting amplitude is large, the working condition of the compressor is influenced by the change of the power supply voltage, fluctuation is caused to the collected working condition test parameters, and the deviation is derived from the change of the power supply voltage and is not caused by the unstable running state of the compressor, so that the accuracy of the overload test result of the compressor is influenced; and jump adjustments can affect the accuracy of the voltage adjustment.
In view of the above problems, the embodiment of the application provides a compressor overload test method, which can ensure that the voltage is slowly and smoothly adjusted to be close to a target test voltage.
The following describes the technical scheme of the embodiment of the present application in detail with reference to the accompanying drawings.
Fig. 1 is a flow chart illustrating a compressor overload test method according to an embodiment of the present application.
Referring to fig. 1, a compressor overload test method includes:
101. acquiring working condition test parameters of the compressor, and adding the working condition test parameters into a current working condition test parameter data set;
in an embodiment of the present application, the working condition test parameters include: suction pressure, discharge pressure, suction temperature, and ambient temperature; accordingly, the working condition test parameter data set includes: an inhalation pressure data set, an exhaustion pressure data set, an inhalation temperature data set, and an ambient temperature data set.
In the embodiment of the application, the data set of the suction pressure is a data set consisting of the suction pressures acquired at different operating voltages; the exhaust pressure data set is a data set composed of exhaust pressures acquired at different operating voltages; the air suction temperature data set is a data set consisting of air suction temperatures acquired at different operating voltages; the ambient temperature data set is a data set consisting of ambient temperatures acquired at different operating voltages.
102. Boosting the operating voltage to enable the compressor to operate at the updated operating voltage;
in the embodiment of the present application, step 102 specifically includes:
the power supply voltage is regulated to the updated operating voltage, and then the current operating voltage is obtained;
judging whether the current operating voltage is equal to the updated operating voltage, if not, regulating the power supply voltage to correct the operating voltage, and then re-executing the step of obtaining the current operating voltage until the current operating voltage is equal to the updated operating voltage;
if yes, controlling the compressor to run for a preset running time period at the updated running voltage, and then executing step 103;
in the actual application process, the preset operation time length can be set according to the actual test requirement, which is not limited herein.
The correction operation voltage is the ratio of the updated operation voltage to the current operation voltage after squaring; the updated operating voltage is the sum of the operating voltage and the voltage regulation accuracy.
In step 102, it is assumed that the operation voltage is boosted, the compressor is operated with the updated operation voltage U1, and after the power supply voltage is adjusted to U1, the current operation voltage is detected as U2, at this time, if the current operation voltage U2 is not equal to the updated operation voltage U1, the power supply voltage is adjusted to the corrected operation voltage U3, and then the current operation voltage is obtained again until U2 is equal to U1, where u3= (u1≡2)/U2.
In the embodiment of the application, in the voltage regulation process, the operation voltage is stepped up with the voltage regulation precision, and supposing that in the embodiment of the application, the voltage regulation precision is DeltaU, when the operation voltage of the compressor is U in the first step up, the compressor operates with the voltage of U+DeltaU after the first step up, and operates with the voltage of U+2DeltaU after the second step up, and so on, until U+NDeltaU is greater than or equal to the target test voltage, and N is a positive integer.
103. Judging whether the updated running voltage reaches a target test voltage or not;
if yes, go to step 104.
In the embodiment of the present application, the target test voltage is preset by the user, and can be adjusted according to the actual test requirement, which is not limited herein.
In the embodiment of the application, when the updated operating voltage still does not reach the target test voltage, a new set of working condition test parameters are acquired when the compressor operates at the updated operating voltage, the new set of working condition test parameters are added into the current working condition test parameter data set, and after the updated operating voltage is boosted again, whether the updated operating voltage reaches the target test voltage is judged, so that a plurality of sets of working condition test parameters under different operating voltages are acquired, and the working condition test parameter data set is formed.
104. And carrying out working condition stability judgment based on the current working condition test parameter data set to obtain an overload test result.
In the embodiment of the application, the system needs to perform one or more of the judgment of the working condition variability, the judgment of the working condition consistency and the judgment of the working condition consistency on four groups of data of the air suction pressure data group, the air discharge pressure data group, the air suction temperature data group and the environment temperature data group.
According to the embodiment of the application, the operating voltage of the compressor is stepped up by taking the voltage regulation precision as a gradient, the working condition test parameters of the compressor are collected under each different operating voltage, a working condition test parameter data set of the compressor is formed, and the operating condition stability of the compressor is detected based on the working condition test parameter data set, so that an overload test result is obtained.
In the process of adjusting the operating voltage, firstly adjusting the power supply voltage to be the target operating voltage, namely the updated operating voltage, then detecting the current operating voltage, when detecting that the current operating voltage is inconsistent with the updated operating voltage, taking the current operating voltage as voltage adjustment feedback, correcting the power supply voltage, taking the corrected operating voltage as the power supply voltage, and then detecting the current operating voltage until the current operating voltage accords with the target operating voltage, namely the updated operating voltage. Through the automatic smooth feedback adjustment, the voltage is continuously close to the target test voltage by taking the voltage adjustment precision as a gradient every time, the smoothness of the operation voltage adjustment process is ensured, the current operation voltage and the updated operation voltage are compared during every time adjustment, the control is continuously compensated, the voltage is slowly and smoothly adjusted to be close to the target test voltage through closed loop feedback, the deviation of the working condition test parameters introduced during the voltage adjustment process is avoided, and the reliability of the overload test result of the compressor is influenced.
Example two
Based on the compressor overload test method in the first embodiment, the embodiment of the application respectively carries out the working condition variability determination, the working condition consistency determination and the working condition consistency determination based on the current working condition test parameter data set of the compressor, and if one of the working condition variability determination, the working condition consistency determination and the working condition consistency determination is failed, the overload test result of the compressor is failed.
The following describes the technical scheme of the embodiment of the present application in detail with reference to the accompanying drawings.
FIG. 2 is a flow chart illustrating a condition stability determination according to an embodiment of the present application.
Referring to fig. 2, a compressor overload test method includes:
201. carrying out working condition variability judgment based on the current working condition test parameter data set to obtain a working condition variability judgment result;
specific:
judging whether the working condition test parameter data meet the working condition variability qualification conditions, if so, judging that the working condition variability judgment result is qualified; if not, the result of the working condition variability judgment is unqualified;
wherein, the condition mutability qualification condition includes: the range of the inspiratory pressure dataset is less than an inspiratory pressure range threshold, the range of the expiratory pressure dataset is less than an expiratory pressure range threshold, the range of the inspiratory temperature dataset is less than an inspiratory temperature range threshold, and the range of the ambient temperature dataset is less than an ambient temperature range threshold.
In the embodiment of the present application, the suction pressure is taken as an example:
judging max [ P ] 1 ,P 2 ,……,P M ]-min[P 1 ,P 2 ,……,P M ]<Δ P If so, indicating that the range of the suction pressure data set is smaller than a suction pressure range threshold; wherein P is 1 ,P 2 ,……,P M Represents the suction pressure at different operating voltages, M is a positive integer, and delta P Represents the suction pressure limit threshold.
And by analogy, respectively judging the exhaust pressure data set, the air suction temperature data set and the environment temperature data set, and then obtaining the result of the working condition mutation judgment.
202. Carrying out working condition compliance judgment based on the current working condition test parameter data set to obtain a working condition compliance judgment result;
specific:
judging whether the working condition test parameter data meet the working condition compliance qualification conditions, if so, judging that the working condition compliance judgment result is qualified; if not, the result of the condition conformity judgment is disqualification;
wherein, the operating mode meets the qualification condition of the suitability, include: the error of each air suction pressure in the air suction pressure data set and the error of the preset air suction pressure are smaller than an air suction pressure error threshold, the error of each air discharge pressure in the air discharge pressure data set and the error of the preset air discharge pressure are smaller than an air discharge pressure error threshold, the error of each air suction temperature in the air suction temperature data set and the error of the preset air suction temperature are smaller than an air suction temperature error threshold, and the error of each ambient temperature in the ambient temperature data set and the error of the preset ambient temperature are smaller than an ambient temperature error threshold.
In the embodiment of the present application, the suction pressure is taken as an example:
judgingIf so, indicating that the error between each suction pressure in the suction pressure data set and the preset suction pressure is smaller than a suction pressure error threshold; wherein,P i represents suction pressure at different operating voltages, P Pre-preparation Representing a preset suction pressure, delta P Representing the inspiratory pressure error threshold.
And by analogy, respectively judging the exhaust pressure data set, the air suction temperature data set and the environment temperature data set, and then obtaining a result of judging the working condition compliance.
203. Carrying out working condition consistency judgment based on the current working condition test parameter data set to obtain a working condition consistency judgment result;
specific:
judging whether the working condition test parameter data meet the working condition consistency qualification conditions, if so, judging that the working condition consistency judgment result is qualified; if not, the result of the working condition consistency judgment is disqualification;
wherein, the qualified condition of operating mode uniformity includes: the standard deviation of the inspiratory pressure dataset is less than an inspiratory pressure standard deviation threshold, the standard deviation of the expiratory pressure dataset is less than an expiratory pressure standard deviation threshold, the standard deviation of the inspiratory temperature dataset is less than an inspiratory temperature standard deviation threshold, and the standard deviation of the ambient temperature dataset is less than an ambient temperature standard deviation threshold.
In the embodiment of the present application, the suction pressure is taken as an example:
judgingIf so, indicating that the standard deviation of the suction pressure data set is smaller than the suction pressure standard deviation threshold value; wherein (1)>Mean value of suction pressure, sigma, in suction pressure data set P Represents the inspiratory pressure standard deviation threshold.
And by analogy, respectively judging the exhaust pressure data set, the air suction temperature data set and the environment temperature data set, and then obtaining a result of judging the consistency of the working conditions.
204. And obtaining an overload test result according to the results of the working condition mutation judgment, the working condition consistency judgment and the working condition consistency judgment.
Judging whether the results of the working condition mutation judgment, the working condition consistency judgment and the working condition consistency judgment are all qualified, if so, the overload test result is qualified, and if not, the overload test result is unqualified.
It should be noted that, the execution timing of the steps 201, 202 and 203 is not strictly limited in the embodiment of the present application, that is, the steps 201, 201 and 203 may be executed in any order, or three steps may be executed in parallel.
It should be noted that, for different test requirements, the steps 201 to 203 may be simplified, for example, for a compressor with a higher requirement for consistency of working conditions during overload operation, the steps 203 may be reserved, and the steps 201 and 202 may be executed as optional steps, that is, in an actual application process, any of the steps 201 to 203 may be executed separately for different test requirements, and then the step 204 may be executed.
The embodiment of the application provides a compressor overload test method, which is used for respectively judging the working condition variability, the working condition consistency and the working condition consistency of four working condition test parameters of suction pressure, exhaust pressure, suction temperature and ambient temperature, and judging that the overload test result of a compressor is qualified only under the condition that all judgment results are qualified, so that the working condition test parameters can be ensured to operate in a normal range, the stability of the working condition test parameters is ensured, and the stability of the operation working condition of the compressor is ensured.
Example III
In the testing process, whether the compressor is closed or not needs to be monitored at any time, and the test is stopped in time, so that safety accidents caused by the closed compressor are avoided.
Aiming at the problems, the embodiment of the application provides a method for testing a distress machine.
FIG. 3 is a flow chart of a method for testing a stuffy machine according to an embodiment of the present application.
Referring to fig. 3, the method for testing the smoldering machine comprises the following steps:
301. acquiring a first operation current, a second operation current and a third operation current of the compressor;
in the embodiment of the application, the acquisition time of the first operation current, the second operation current and the third operation current are sequentially separated by a current scanning period, and the current scanning period can be set according to actual test requirements.
302. Judging whether the compressor is in a closed state based on the first operating current, the second operating current and the third operating current,
if yes, go to step 303;
if not, returning to the execution step 301 until the compressor is in a closed state or an overload test result is obtained.
Specific:
calculating the absolute value of the difference value between the first operation current and the second operation current to obtain a first current change value;
calculating the absolute value of the difference value of the second operation current and the third operation current to obtain a second current change value;
and judging whether the absolute value of the difference value of the first current change value and the second current change value is larger than a current change value threshold value or not.
303. And controlling the compressor to stop.
In the embodiment of the application, in the overload test process of the compressor, the compressor needs to be tested all the time, and the operation voltage of the compressor is continuously boosted in the overload test process, so that the operation current of the compressor is correspondingly boosted, when the absolute value of the difference value of the first current variation value and the second current variation value is larger than the current variation value threshold value, the compressor is in a closed state, the operation current of the compressor is rapidly boosted at the moment, and the compressor is easy to damage, therefore, the compressor needs to be controlled to stop in time, and correspondingly, when the overload test of the compressor is finished, the operation voltage of the compressor is not boosted any more, and at the moment, the compressor can be correspondingly stopped.
According to the embodiment of the application, through the method for testing the compressor, the running current of the compressor is scanned in real time, and whether the current change degree in 2 current scanning periods accords with the normal change degree is judged, so that whether the compressor has the compressor distress problem is determined, the state of the compressor in the overload testing process is monitored in real time, the damage to the compressor caused by the overload testing is prevented, and the safe performance of the overload testing is ensured.
Example IV
Corresponding to the embodiment of the application function implementation method, the application also provides a compressor overload test system and a corresponding embodiment.
Fig. 4 is a schematic structural view of a compressor overload test system according to an embodiment of the present application.
Referring to fig. 4, a compressor overload test system for performing the method of any one of embodiments one to three, comprising:
the test device comprises a variable frequency power supply, test equipment, a memory and a processor;
the variable frequency power supply is used for providing operation voltage for the compressor;
the test equipment is connected with the memory and is used for acquiring working condition test parameters of the compressor and operating voltage of the compressor and sending the working condition test parameters and the operating voltage to the memory;
the variable frequency power supply, the testing equipment and the memory are respectively connected with the processor, the processor controls the variable frequency power supply to output different power supply voltages, controls the testing equipment to execute the actions of acquiring working condition testing parameters of the compressor and operating voltage of the compressor, and judges and obtains an overload testing result based on data in the memory.
In an embodiment of the application, the processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), field-programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include various types of storage units, such as system memory, read Only Memory (ROM), and persistent storage. Wherein the ROM may store static data or instructions that are required by the processor or other modules of the computer. The persistent storage may be a readable and writable storage. The persistent storage may be a non-volatile memory device that does not lose stored instructions and data even after the computer is powered down. In some embodiments, the persistent storage device employs a mass storage device (e.g., magnetic or optical disk, flash memory) as the persistent storage device. In other embodiments, the persistent storage may be a removable storage device (e.g., diskette, optical drive). The system memory may be a read-write memory device or a volatile read-write memory device, such as dynamic random access memory. The system memory may store instructions and data that are required by some or all of the processors at runtime. Furthermore, the memory may comprise any combination of computer-readable storage media including various types of semiconductor memory chips (DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), magnetic disks, and/or optical disks may also be employed. In some embodiments, the memory may include a removable storage device that is readable and/or writable, such as a Compact Disc (CD), a read-only digital versatile disc (e.g., DVD-ROM, dual layer DVD-ROM), a read-only blu-ray disc, an ultra-dense disc, a flash memory card (e.g., SD card, min SD card, micro-SD card, etc.), a magnetic floppy disk, and the like. The computer readable storage medium does not contain a carrier wave or an instantaneous electronic signal transmitted by wireless or wired transmission.
The specific manner in which the respective modules perform the operations in the apparatus of the above embodiments has been described in detail in the embodiments related to the method, and will not be described in detail herein.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments. Those skilled in the art will also appreciate that the acts and modules referred to in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined and pruned according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided and pruned according to actual needs.
Furthermore, the method according to the application may also be implemented as a computer program or computer program product comprising computer program code instructions for performing part or all of the steps of the above-described method of the application.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the application herein may be implemented as electronic hardware, computer software, or combinations of both.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. 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). It should also be noted that 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. It will also be noted that 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.
The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. A compressor overload test method, comprising:
acquiring working condition test parameters of the compressor, and adding the working condition test parameters into a current working condition test parameter data set; the working condition test parameters comprise: suction pressure, discharge pressure, suction temperature, and ambient temperature; the working condition test parameter data set comprises: an intake pressure data set, an exhaust pressure data set, an intake temperature data set, and an ambient temperature data set;
boosting the operation voltage to enable the compressor to operate at the updated operation voltage, specifically: adjusting the power supply voltage to the updated operating voltage and then obtaining the current operating voltage; judging whether the current operating voltage is equal to the updated operating voltage, if not, adjusting the power supply voltage to the corrected operating voltage, and then re-executing the step of obtaining the current operating voltage until the current operating voltage is equal to the updated operating voltage; the corrected operating voltage is the ratio of the updated operating voltage to the current operating voltage after squaring; the updated operating voltage is the sum of the operating voltage and voltage regulation precision; each time of voltage regulation takes the voltage regulation precision as a gradient, the running voltage of the compressor is stepped up, and finally the target test voltage is reached;
judging whether the updated running voltage reaches a target test voltage or not, if so, judging the stability of the working condition based on the current working condition test parameter data set to obtain an overload test result; the working condition stability judgment is carried out based on the current working condition test parameter data set to obtain an overload test result, and the method comprises the following steps: judging the variability of the working condition based on the current working condition test parameter data set; wherein, operating mode variability judges, includes:
judging whether the working condition testing parameter data set meets the working condition variability qualification condition, if so, judging that the working condition variability is qualified; if not, the result of the working condition variability judgment is unqualified; the working condition mutation qualification condition comprises: the range of the inspiratory pressure dataset is less than an inspiratory pressure range threshold, the range of the expiratory pressure dataset is less than an expiratory pressure range threshold, the range of the inspiratory temperature dataset is less than an inspiratory temperature range threshold, and the range of the ambient temperature dataset is less than an ambient temperature range threshold.
2. The compressor overload test method according to claim 1, wherein the working condition stability determination is performed based on a current working condition test parameter data set to obtain an overload test result, further comprising: and carrying out working condition compliance judgment based on the current working condition test parameter data set, wherein the working condition compliance judgment comprises the following steps:
judging whether the current working condition testing parameter data set meets the working condition compliance qualification conditions, if so, judging that the working condition compliance judgment result is qualified; if not, the result of the condition conformity judgment is disqualification;
the working condition compliance qualification condition comprises: the error of each air suction pressure in the air suction pressure data set and the error of the preset air suction pressure are smaller than an air suction pressure error threshold, the error of each air discharge pressure in the air discharge pressure data set and the error of the preset air discharge pressure are smaller than an air discharge pressure error threshold, the error of each air suction temperature in the air suction temperature data set and the error of the preset air suction temperature are smaller than an air suction temperature error threshold, and the error of each ambient temperature in the ambient temperature data set and the error of the preset ambient temperature are smaller than an ambient temperature error threshold.
3. The compressor overload test method according to claim 2, wherein the working condition stability determination is performed based on the current working condition test parameter data set to obtain an overload test result, further comprising: and carrying out working condition consistency judgment based on the current working condition test parameter data set, wherein the working condition consistency judgment comprises the following steps:
judging whether the working condition test parameter data set meets the working condition consistency qualification condition, if so, judging that the working condition consistency judgment result is qualified; if not, the result of the working condition consistency judgment is disqualification;
the condition consistency qualification condition comprises: the standard deviation of the inspiratory pressure dataset is less than an inspiratory pressure standard deviation threshold, the standard deviation of the expiratory pressure dataset is less than an expiratory pressure standard deviation threshold, the standard deviation of the inspiratory temperature dataset is less than an inspiratory temperature standard deviation threshold, and the standard deviation of the ambient temperature dataset is less than an ambient temperature standard deviation threshold.
4. A compressor overload test method according to claim 3, wherein the overload test result is failed if a result of one of the condition variability determination, the condition compliance determination, and the condition compliance determination is failed.
5. The compressor overload test method of claim 1, wherein after determining whether the current operating voltage is equal to the updated operating voltage, further comprising:
and if the current running voltage is equal to the updated running voltage, controlling the compressor to run for a preset running time with the updated running voltage, and then executing the step of judging whether the updated running voltage reaches a target test voltage.
6. The compressor overload testing method of claim 1, further comprising:
acquiring a first operation current, a second operation current and a third operation current of the compressor;
judging whether the compressor is in a closed state or not based on the first operation current, the second operation current and the third operation current, and if so, controlling the compressor to stop; if not, executing the step of acquiring the first operation current, the second operation current and the third operation current of the compressor until the compressor is in a closed state or an overload test result is obtained;
and the acquisition moments of the first operation current, the second operation current and the third operation current are sequentially separated by one current scanning period.
7. The compressor overload test method of claim 6, wherein the determining whether the compressor is in a stuffy state based on the first operating current, the second operating current, and the third operating current includes:
calculating the absolute value of the difference value between the first operation current and the second operation current to obtain a first current change value;
calculating the absolute value of the difference value of the second operation current and the third operation current to obtain a second current change value;
and judging whether the absolute value of the difference value of the first current change value and the second current change value is larger than a current change value threshold value or not.
8. A compressor overload test system, configured to perform the compressor overload test method of any one of claims 1-7, comprising:
the test device comprises a variable frequency power supply, test equipment, a memory and a processor;
the variable frequency power supply is used for providing operation voltage for the compressor;
the test equipment is connected with the memory and is used for acquiring working condition test parameters of the compressor and operating voltage of the compressor and sending the working condition test parameters and the operating voltage to the memory;
the variable frequency power supply, the testing equipment and the memory are respectively connected with the processor, the processor controls the variable frequency power supply to output different power supply voltages, controls the testing equipment to execute the actions of acquiring working condition testing parameters of the compressor and operating voltage of the compressor, and judges and obtains an overload testing result based on data in the memory.
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