CN112728821B - Compressor ultralow-temperature safe operation control method, device, equipment and storage medium - Google Patents
Compressor ultralow-temperature safe operation control method, device, equipment and storage medium Download PDFInfo
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- CN112728821B CN112728821B CN201910974389.2A CN201910974389A CN112728821B CN 112728821 B CN112728821 B CN 112728821B CN 201910974389 A CN201910974389 A CN 201910974389A CN 112728821 B CN112728821 B CN 112728821B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The embodiment of the application discloses a compressor ultralow-temperature safe operation control method, device, equipment and storage medium. According to the embodiment of the application, the real-time suction pressure value and the real-time exhaust pressure value of the compressor are detected after the compressor is started by presetting the corresponding exhaust pressure threshold value under different suction pressures of the compressor, and the corresponding exhaust pressure threshold value is determined.
Description
Technical Field
The embodiment of the application relates to the technical field of compressors, in particular to a method, a device, equipment and a storage medium for controlling ultralow-temperature safe operation of a compressor.
Background
At present, with the development and progress of the energy-saving technology of the heat pump, the ambient temperature range of the heat pump is wider and wider. Particularly, after the enhanced vapor injection compressor is matched with the R410a refrigerant, the temperature range of stable operation of the compressor is expanded to be below 35 ℃ below zero, so that the heat pump can meet the use requirements under a wider range of environmental temperatures.
However, according to this operation characteristic of the heat pump, when it is operated in an ultra-low temperature environment, the suction pressure of the compressor is relatively small, and the discharge pressure is relatively high, so that a relatively large difference is formed between the discharge pressure and the suction pressure difference. Further, in the event of frost formation, the difference between the compressor suction pressure and discharge pressure may be greater. And the difference value between the exhaust pressure and the suction pressure of the compressor is too large, so that the compressor runs at super-mechanical strength, the problem of heat pump failure is caused, and the use experience of a user is influenced.
Disclosure of Invention
The embodiment of the application provides a method, a device, equipment and a storage medium for controlling the ultralow-temperature safe operation of a compressor, which can better adjust the difference value between the exhaust pressure and the suction pressure of the compressor and realize the ultralow-temperature safe operation control of the compressor.
In a first aspect, an embodiment of the present application provides a compressor ultralow temperature safe operation control method, including:
presetting exhaust pressure thresholds corresponding to different suction pressures of a compressor, wherein the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary value is a maximum exhaust pressure value allowed by safe operation of the compressor corresponding to the different suction pressures;
after the compressor is started, detecting a real-time suction pressure value and a real-time exhaust pressure value of the compressor, and determining a corresponding exhaust pressure threshold according to the real-time suction pressure value;
and comparing the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency adjustment stage of the compressor so as to reduce the difference between the suction pressure and the exhaust pressure.
Further, the comparing the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, performing frequency adjustment of the compressor by using a corresponding frequency adjustment mode according to a frequency modulation stage where the compressor is currently located includes:
when the compressor is in a stable frequency stage, if the real-time suction pressure value is greater than or equal to the sum of the corresponding discharge pressure threshold value and a first preset positive deviation value, controlling the compressor to perform frequency reduction at a first preset speed until the real-time suction pressure value is less than the difference between the corresponding discharge pressure threshold value and a first preset negative deviation value, and stopping frequency reduction.
Further, the comparing the real-time exhaust pressure value with the exhaust pressure threshold value, and when the real-time exhaust pressure value reaches the exhaust pressure threshold value, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, further includes:
and when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is greater than or equal to the sum of the corresponding exhaust pressure threshold and a second preset positive deviation value, controlling the compressor to reduce the frequency at a second preset rate until the real-time suction pressure value is less than the difference between the corresponding exhaust pressure threshold and a first preset negative deviation value, and stopping reducing the frequency.
Further, the comparing the real-time exhaust pressure value with the exhaust pressure threshold value, and when the real-time exhaust pressure value reaches the exhaust pressure threshold value, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, further includes:
and when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is greater than or equal to the sum of the corresponding exhaust pressure threshold and a third preset positive deviation value, controlling the compressor to reduce the frequency at a third preset rate until the real-time suction pressure value is less than the difference between the corresponding exhaust pressure threshold and a first preset negative deviation value, and stopping reducing the frequency.
Further, the comparing the real-time exhaust pressure value with the exhaust pressure threshold value, and when the real-time exhaust pressure value reaches the exhaust pressure threshold value, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, further includes:
and when the compressor is in the frequency increasing stage, if the real-time suction pressure value is greater than or equal to the difference between the corresponding exhaust pressure threshold and a first preset negative deviation value, controlling the compressor to stop increasing the frequency.
Further, before the preset exhaust pressure threshold corresponding to different suction pressures of the compressor, the method includes:
acquiring a corresponding exhaust pressure boundary value when the suction pressure changes in a compressor operation safety experiment, and generating a compressor operation safety block diagram based on different suction pressures and the corresponding exhaust pressure boundary values;
correspondingly, in the preset exhaust pressure thresholds corresponding to the different suction pressures of the compressor, the exhaust pressure thresholds corresponding to the different suction pressures of the compressor are preset according to the compressor operation safety diagram.
Further, after the frequency of the compressor is adjusted by using a corresponding frequency adjustment mode according to the current frequency adjustment stage of the compressor, the method further includes:
and if the real-time exhaust pressure value cannot be lower than the exhaust pressure threshold value through the frequency adjustment of the compressor, judging that the control is abnormal, and outputting an abnormal prompt.
In a second aspect, embodiments of the present application provide a compressor ultra-low temperature safe operation control device, including:
the setting module is used for presetting corresponding exhaust pressure thresholds of the compressor under different suction pressures, the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary values are maximum exhaust pressure values allowed by safe operation of the compressor under the corresponding different suction pressures;
the detection module is used for detecting a real-time suction pressure value and a real-time exhaust pressure value of the compressor after the compressor is started, and determining a corresponding exhaust pressure threshold according to the real-time suction pressure value;
and the adjusting module is used for comparing the real-time exhaust pressure value with the exhaust pressure threshold value, and when the real-time exhaust pressure value reaches the exhaust pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency modulation stage of the compressor so as to reduce the difference value between the suction pressure and the exhaust pressure.
In a third aspect, an embodiment of the present application provides an electronic device, including:
a memory and one or more processors;
the memory to store one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the compressor ultra-low temperature safe operation control method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a storage medium containing computer-executable instructions for performing the compressor ultra-low temperature safe operation control method according to the first aspect when the computer-executable instructions are executed by a computer processor.
According to the embodiment of the application, the real-time suction pressure value and the real-time exhaust pressure value of the compressor are detected after the compressor is started by presetting the corresponding exhaust pressure threshold value under different suction pressures of the compressor, and the corresponding exhaust pressure threshold value is determined.
Drawings
FIG. 1 is a flowchart illustrating a method for controlling ultra-low temperature safe operation of a compressor according to an embodiment of the present application;
FIG. 2 is a flowchart of a control method for ultra-low temperature safe operation of a compressor according to a second embodiment of the present application;
FIG. 3 is a schematic structural diagram of an ultralow temperature safe operation control device of a compressor according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present application are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but could have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, subprograms, and the like.
The application provides a compressor ultralow-temperature safe operation control method, which aims to realize the adjustment of the suction pressure and the exhaust pressure of a compressor through the frequency adjustment of the compressor, further reduce the difference between the real-time suction pressure and the real-time exhaust pressure of the compressor and avoid the condition that the compressor runs with ultra-mechanical strength. Under the condition of running of the existing heat pump in an ultralow temperature environment, the exhaust pressure of a compressor is relatively large, the suction pressure of the compressor is relatively small, and therefore a large difference is generated between the suction pressure and the exhaust pressure of the compressor, and the compressor bears stress with certain strength due to the difference. And, along with the difference between suction pressure and discharge pressure increases gradually, can make the stress that the compressor inside bore increase gradually, the compressor is super mechanical strength operation to the too big messenger of the compressor inside bore stress, can make the compressor wear and tear seriously and burn out, and then influence the work efficiency of compressor, even make the heat pump operation trouble appear. Therefore, the method for controlling the ultralow-temperature safe operation of the compressor in the embodiment of the application is provided to solve the problem that the difference between the suction pressure and the discharge pressure is too large under the ultralow-temperature operation condition of the compressor.
The first embodiment is as follows:
fig. 1 is a flowchart of a compressor ultra-low temperature safe operation control method according to an embodiment of the present disclosure, where the compressor ultra-low temperature safe operation control method provided in this embodiment may be executed by a compressor ultra-low temperature safe operation control device, the compressor ultra-low temperature safe operation control device may be implemented in a software and/or hardware manner, and the compressor ultra-low temperature safe operation control device may be formed by two or more physical entities or may be formed by one physical entity. Generally, the compressor ultra-low temperature safe operation control device may be a compressor main control device.
The following description will be given taking the compressor ultra-low temperature safe operation control apparatus as an example of an apparatus for performing the compressor ultra-low temperature safe operation control method. Referring to fig. 1, the method for controlling ultralow temperature safe operation of the compressor specifically includes:
s110, pre-setting corresponding exhaust pressure thresholds of the compressor under different suction pressures, wherein the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary value is a maximum exhaust pressure value allowed by safe operation of the compressor under the corresponding different suction pressures.
In order to realize the adjustment of the real-time suction pressure and the real-time discharge pressure of the compressor, the difference value between the suction pressure and the discharge pressure of the compressor is reduced. It is necessary to preset a discharge pressure threshold of the compressor at the corresponding suction pressure. I.e., the compressor is at any suction pressure, there will be a corresponding discharge pressure threshold. When the discharge pressure of the discharge port of the compressor is below the discharge pressure threshold value, the difference value between the suction pressure and the discharge pressure of the compressor is within the range allowed by the safe operation of the compressor. And once the discharge pressure of the compressor exceeds the discharge pressure threshold, the difference between the suction pressure and the discharge pressure of the compressor exceeds the allowable range of safe operation of the compressor, and the compressor can bear large stress when operating under the condition of the pressure difference, so that the compressor has the condition of ultra-mechanical strength operation. Therefore, it is necessary to set a discharge pressure threshold value for each suction pressure of the compressor in advance. In the embodiment of the present application, the suction pressure and the discharge pressure of the compressor may be collected according to air pressure sensors respectively disposed at an air inlet and an air outlet of the compressor. There are many ways to collect the suction pressure and the discharge pressure of the compressor, and the embodiment of the application is not limited fixedly.
Specifically, the exhaust pressure threshold is set according to information of an exhaust pressure boundary value, and the exhaust pressure boundary value is a maximum exhaust pressure value allowed by safe operation of the compressor corresponding to different suction pressures. In order to determine the corresponding discharge pressure boundary value at each suction pressure, a safety experiment for the operation of the compressor needs to be performed corresponding to each suction pressure. In the operation safety experiment of the compressor, the experiment is respectively carried out corresponding to each suction pressure value in a variable control mode, the exhaust pressure of the compressor is continuously adjusted under the condition that the suction pressure value is not changed, and when the exhaust pressure of the compressor reaches the maximum stress value which can be born by the safe operation of the compressor, the exhaust pressure value of the compressor at the moment is considered as an exhaust pressure boundary value under the corresponding suction pressure. Further, the exhaust pressure boundary value is set as an exhaust pressure threshold value corresponding to the intake pressure, or the exhaust pressure threshold value is set based on the exhaust pressure boundary value in consideration of the influence of measurement, calculation variation, or the like. Further, during the setting of the exhaust pressure threshold. The corresponding exhaust pressure boundary value is acquired when the suction pressure changes in the operation safety experiment of the compressor. And generating a compressor operation safety block diagram based on different suction pressures and corresponding discharge pressure boundary values. The compressor operation safety block diagram comprises corresponding exhaust pressure boundary values under different suction pressures, and the exhaust pressure threshold value is set based on the compressor operation safety block diagram when the exhaust pressure threshold value is set subsequently. When the compressor operates, the air suction pressure and the air discharge pressure are both in the interior of the block diagram, the compressor is safe to operate, and if the air discharge pressure value of the compressor exceeds the operation safety block diagram of the compressor under a certain air suction pressure, pressure adjustment is needed to avoid the overlarge difference value between the air suction pressure and the air discharge pressure of the compressor.
And S120, after the compressor is started, detecting a real-time suction pressure value and a real-time exhaust pressure value of the compressor, and determining a corresponding exhaust pressure threshold according to the real-time suction pressure value.
And when the compressor starts to work, the interface carries out safe control on the operation of the compressor in real time so that the discharge pressure of the compressor is operated in a safe range. When the compressor starts to operate, the real-time suction pressure value P of the air inlet of the compressor is detectedsAnd real-time discharge pressure value P of compressor discharge portd. Further based on the collected real-time suction pressure value PsComparing the compressor operation safety diagram to obtain the real-time suction pressure value PdCorresponding exhaust pressure threshold value Pdmax. Based on the determined real-time exhaust pressure value PdAnd comparing the exhaust pressure threshold value P obtained by the compressor operation safety block diagramdmaxThe two pressure values can be compared, and whether the current compressor exhaust pressure value exceeds the safe operation range of the compressor or not is judged.
S130, comparing the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor so as to reduce the difference between the suction pressure and the exhaust pressure.
When the compressor is designed, the mechanical strength and the friction clearance of the structure have the maximum threshold, the suction pressure of the compressor can be increased and the discharge pressure can be reduced by means of frequency reduction, and the difference value between the discharge pressure and the suction pressure can be reduced, so that the mechanical strength stress in the compressor is reduced. Therefore, in order to reduce the mechanical strength stress inside the compressor and avoid the compressor from operating beyond the mechanical strength, the frequency adjustment of the compressor is required.
Specifically, when the real-time exhaust pressure value is compared with the corresponding exhaust pressure threshold, the influence of the deviation factor on the exhaust pressure threshold needs to be considered. Moreover, it should be noted that, in the compressor at different frequency adjusting stages, the deviation of the discharge pressure threshold is also affected, so different deviation values need to be set corresponding to different frequency adjusting conditions of the compressor.
In addition, when the real-time exhaust pressure value reaches the exhaust pressure threshold value and the compressor performs frequency adjustment, different frequency adjustment rates need to be used for performing the frequency adjustment of the compressor corresponding to different frequency adjustment stages. Different frequency modulation rates are adopted, on one hand, the difference between the suction pressure and the discharge pressure of the compressor can be adjusted as soon as possible through frequency adjustment of the compressor, on the other hand, the frequency fluctuation of the compressor is relatively stable when the frequency adjustment is ensured, the exaggerated frequency fluctuation can not occur, and the influence on the operation of the compressor caused by the overlarge frequency fluctuation is avoided.
Illustratively, the compressor is operated in a steady frequency phase, at which time the discharge pressure threshold P is presetdmaxCorresponding to the first preset positive deviation value A, when the real-time exhaust pressure value P is detectedd≥Pdmax+ A indicates that the difference between the suction pressure and the discharge pressure of the compressor is too large due to too large discharge pressure value of the current compressor, and the pressure difference of the compressor needs to be adjusted. The compressor is controlled to perform down-conversion at a first preset rate S1 corresponding to the current frequency modulation stage. The first preset rate S1 is experimentally measured by making the discharge pressure value Pd≥ PdmaxAnd if the + A condition is satisfied, selecting different frequency reduction rates to perform the frequency reduction adjustment of the compressor, and finally selecting the most suitable frequency reduction rate as the first preset rate S1 in the frequency reduction adjustment process of the compressor.
When the compressor is in the stable frequency stage or the frequency reduction stage, the discharge pressure threshold P at the moment is presetdmaxCorresponding second preset positive deviation value B, when the real-time exhaust pressure value P is detectedd≥Pdmax+ B, it shows that the difference between the suction pressure and the discharge pressure of the compressor is too large due to too large discharge pressure value of the current compressor, and the adjustment of the pressure difference of the compressor is needed. The compressor is controlled to perform down-conversion at a second preset rate S2 corresponding to the current frequency modulation stage. The second preset rate S2 is determined experimentally by making the value of the discharge pressure Pd≥ PdmaxThe + B condition, selecting different frequency reduction rates to carry out the frequency reduction regulation of the compressor, and finally selectingThe most suitable down-conversion rate is used as the second preset rate S2 during the down-conversion process of the compressor.
When the compressor is in the stable frequency stage or the frequency reduction stage, the discharge pressure threshold P at the moment is presetdmaxCorresponding third preset positive deviation value C when detecting real-time exhaust pressure value Pd≥Pdmax+ C, it indicates that the current compressor discharge pressure value is too large, which results in too large difference between the compressor suction pressure and discharge pressure, and needs to adjust the compressor pressure difference. The compressor is controlled to perform down-conversion at a third preset rate S3 corresponding to the current frequency modulation stage. The third preset rate S3 is experimentally measured by making the discharge pressure value Pd≥ PdmaxAnd C, selecting different frequency reduction rates to perform compressor frequency reduction adjustment, and finally selecting the most suitable frequency reduction rate as a third preset rate S3 in the process of performing frequency reduction adjustment on the compressor. It will be understood that the discharge pressure value P is due to the fact that the compressor is in the same stable frequency phase or reduced frequency phasedAccording to different frequency reduction rates, frequency reduction is carried out according to different frequency reduction rates, so that the fluctuation of the compressor frequency under corresponding conditions is stable. Therefore, the first, second and third preset positive deviation values a, B and C are preset to correspond to different exhaust pressure values PdAnd detecting and adjusting the frequency.
It should be noted that, in the three different frequency stages, the compressor is subjected to frequency reduction, so that the real-time exhaust pressure value of the compressor is decreased, the real-time suction pressure is increased, and the difference between the real-time suction pressure and the real-time exhaust pressure of the compressor is further reduced. When the compressor real-time exhaust pressure value P is reduced by frequency reductiondIs less than or equal to exhaust pressure threshold value PdmaxWhen the corresponding first preset negative deviation value D is subtracted, the current real-time exhaust pressure value is controlled within a reasonable range, the compressor runs safely, and the condition of running beyond mechanical strength cannot occur. Also, the compressor will not be at the real-time discharge pressure value P in view of the detected and calculated deviationsdIs less than or equal to exhaust pressure threshold value PdmaxThe frequency reduction is stopped at all times, but the deviation is taken into accountObtaining a first predetermined negative deviation D when Pd≤PdmaxAnd D, stopping the frequency reduction.
In addition, in the process of performing compressor down-regulation, the discharge pressure of the compressor is reduced by down-regulation, so that the current frequency regulation stage of the compressor can jump to another frequency regulation stage for frequency regulation. Such as Pd≥PdmaxWhen the pressure is in the range of + A, the real-time exhaust pressure is reduced through frequency reduction regulation, and the real-time exhaust pressure value of the compressor is regulated to Pdmax+B≤Pd≤Pdmax+ A, then further according to the real-time exhaust pressure value Pd≥ Pdmax+ B, down-regulation is performed to reduce the real-time discharge pressure value P of the compressord. Analogizing until the real-time exhaust pressure value P of the compressordIs less than or equal to exhaust pressure threshold value PdmaxAnd stopping reducing the frequency when the corresponding first preset negative deviation value D is subtracted.
On the other hand, when the compressor is in the up-conversion stage, the discharge pressure threshold P at that time is presetdmaxCorresponding to the first preset negative deviation value D, when the real-time exhaust pressure value P is detectedd≥PdmaxAnd D, indicating that the current compressor discharge pressure value is too large, so that the difference between the suction pressure and the discharge pressure of the compressor is too large, and controlling the compressor to stop increasing the frequency. It should be noted that, since the deviation of the discharge pressure is a negative deviation value at the compressor up-frequency stage, the real-time discharge pressure value P is performeddWith exhaust pressure threshold PdmaxIn the comparison process, the exhaust pressure threshold value P needs to be compareddmaxThe corresponding first preset negative deviation value D is subtracted. After the frequency increase is stopped, if the compressor is in a stable frequency stage at this time, if it is detected that the real-time exhaust pressure value reaches the exhaust pressure threshold at this time, the frequency of the compressor is adjusted by referring to the stable frequency stage.
The method includes the steps that corresponding exhaust pressure thresholds of the compressor under different suction pressures are preset, after the compressor is started, a real-time suction pressure value and a real-time exhaust pressure value of the compressor are detected, the corresponding exhaust pressure threshold is determined, when the real-time exhaust pressure value reaches the exhaust pressure threshold, the frequency of the compressor is adjusted in a corresponding frequency adjusting mode according to a frequency modulation stage where the compressor is located at present, the difference between the suction pressure and the exhaust pressure of the compressor is reduced through the frequency adjustment of the compressor, the mechanical strength stress inside the compressor is reduced, the super-mechanical strength operation of the compressor is avoided, the heat pump fault is further avoided, and the user experience is optimized.
Example two:
on the basis of the above embodiments, fig. 2 is a flowchart of another compressor ultra-low temperature safe operation control method provided in the second embodiment of the present application. Referring to fig. 2, the method for controlling ultralow temperature safe operation of the compressor provided in this embodiment specifically includes:
s210, presetting corresponding exhaust pressure thresholds of the compressor under different suction pressures, wherein the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary values are maximum exhaust pressure values allowed by safe operation of the compressor under the corresponding different suction pressures;
s220, after the compressor is started, detecting a real-time suction pressure value and a real-time exhaust pressure value of the compressor, and determining a corresponding exhaust pressure threshold according to the real-time suction pressure value;
and S230, comparing the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency adjustment stage of the compressor so as to reduce the difference between the suction pressure and the exhaust pressure.
And S240, if the real-time exhaust pressure value cannot be lower than the exhaust pressure threshold value through the frequency adjustment of the compressor, determining that the control is abnormal, and outputting an abnormal prompt.
According to the embodiment of the application, after the frequency of the compressor is adjusted, the real-time suction pressure value and the real-time exhaust pressure value of the compressor are detected again, the corresponding exhaust pressure threshold value is determined according to the real-time suction pressure value, the real-time exhaust pressure value and the exhaust pressure threshold value are compared again, whether the current frequency adjustment of the compressor reduces the difference value between the suction pressure and the exhaust pressure of the compressor is determined, and the exhaust pressure of the compressor is enabled to be within the range allowed by the safe operation of the compressor. And if the real-time exhaust pressure value cannot be lower than the exhaust pressure threshold value through the frequency adjustment of the compressor, judging that the safe operation control of the compressor is abnormal, and outputting an abnormal prompt. The device is informed to relevant personnel to overhaul the device, and further damage of the device is avoided.
According to the scheme, after the frequency of the compressor is adjusted, whether the real-time exhaust pressure value is lower than the exhaust pressure threshold value or not is judged through judging whether the frequency of the compressor is adjusted, whether the safe operation control of the compressor is effective or not is determined, if the frequency is invalid, abnormal prompt of the safe operation of the compressor is output, related personnel are reminded to maintain in time, the compressor is prevented from being further damaged, the safe operation of equipment is guaranteed, and the use experience of a user is further optimized.
Example three:
on the basis of the above embodiments, fig. 3 is a schematic structural diagram of a compressor ultra-low temperature safe operation control device provided in the third embodiment of the present application. Referring to fig. 3, the ultralow temperature safe operation control device for a compressor provided in this embodiment specifically includes: a setting module 31, a detection module 32 and an adjustment module 33.
The setting module 31 is configured to preset exhaust pressure thresholds corresponding to different suction pressures of the compressor, where the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary value is a maximum exhaust pressure value allowed by safe operation of the compressor corresponding to the different suction pressures;
the detection module 32 is configured to detect a real-time suction pressure value and a real-time exhaust pressure value of the compressor after the compressor is started, and determine the corresponding exhaust pressure threshold according to the real-time suction pressure value;
and the adjusting module 33 is configured to compare the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, perform frequency adjustment on the compressor in a corresponding frequency adjustment manner according to a current frequency modulation stage of the compressor, so as to reduce a difference between the suction pressure and the exhaust pressure.
The method includes the steps that corresponding exhaust pressure thresholds of the compressor under different suction pressures are preset, after the compressor is started, a real-time suction pressure value and a real-time exhaust pressure value of the compressor are detected, the corresponding exhaust pressure threshold is determined, when the real-time exhaust pressure value reaches the exhaust pressure threshold, the frequency of the compressor is adjusted in a corresponding frequency adjusting mode according to a frequency modulation stage where the compressor is located at present, the difference between the suction pressure and the exhaust pressure of the compressor is reduced through the frequency adjustment of the compressor, the mechanical strength stress inside the compressor is reduced, the super-mechanical strength operation of the compressor is avoided, the heat pump fault is further avoided, and the user experience is optimized.
Specifically, the adjusting module includes a first adjusting unit, configured to, when the compressor is in a stable frequency stage, control the compressor to perform frequency reduction at a first preset rate if the real-time suction pressure value is greater than or equal to a sum of the corresponding discharge pressure threshold and a first preset positive deviation value, and stop the frequency reduction until the real-time suction pressure value is less than a difference between the corresponding discharge pressure threshold and the first preset negative deviation value.
Specifically, the adjusting module further includes a second adjusting unit, configured to, when the compressor is in a stable frequency stage or a frequency reduction stage, control the compressor to reduce the frequency at a second preset rate if the real-time suction pressure value is greater than or equal to a sum of the corresponding discharge pressure threshold and a second preset positive deviation value, until the real-time suction pressure value is less than a difference between the corresponding discharge pressure threshold and a first preset negative deviation value, and stop reducing the frequency.
Specifically, the adjusting module further includes a third adjusting unit, configured to, when the compressor is in a stable frequency stage or a frequency reduction stage, control the compressor to reduce the frequency at a third preset rate if the real-time suction pressure value is greater than or equal to a sum of the corresponding discharge pressure threshold and a third preset positive deviation value, until the real-time suction pressure value is less than a difference between the corresponding discharge pressure threshold and a first preset negative deviation value, and stop reducing the frequency.
Specifically, the adjusting module further includes a fourth adjusting unit, configured to control the compressor to stop raising the frequency if the real-time suction pressure value is greater than or equal to a difference between the corresponding discharge pressure threshold and the first preset negative deviation value when the compressor is in a frequency raising stage.
The system comprises a compressor, an acquisition module and a control module, wherein the acquisition module is used for acquiring a corresponding exhaust pressure boundary value when the suction pressure changes in the operation safety experiment of the compressor and generating a compressor operation safety block diagram based on different suction pressures and the corresponding exhaust pressure boundary values.
Specifically, the control device further comprises a prompting module, which is used for determining that the control is abnormal and outputting an abnormal prompt when the real-time exhaust pressure value cannot be made lower than the exhaust pressure threshold value through the frequency adjustment of the compressor.
The compressor ultralow-temperature safe operation control device provided by the third embodiment of the application can be used for executing the compressor ultralow-temperature safe operation control method provided by the first embodiment and the second embodiment, and has corresponding functions and beneficial effects.
Example four:
an embodiment of the present application provides an electronic device, and with reference to fig. 4, the electronic device includes: a processor 41, a memory 42, a communication module 43, an input device 44, and an output device 45. The number of processors in the electronic device may be one or more, and the number of memories in the electronic device may be one or more. The processor 41, the memory 42, the communication module 43, the input device 44 and the output device 45 of the electronic device may be connected by a bus or other means.
The memory 42 is used as a computer readable storage medium for storing software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the compressor ultra-low temperature safe operation control method according to any embodiment of the present application (e.g., a setting module, a detection module, and a regulation module in the compressor ultra-low temperature safe operation control device). The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory may further include memory remotely located from the processor, which may be connected to the device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The communication module 43 is used for data transmission.
The processor 41 executes various functional applications and data processing of the apparatus by operating software programs, instructions and modules stored in the memory, that is, implements the above-described compressor ultra-low temperature safe operation control method.
The input device 44 is operable to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the apparatus. The output device 45 may include a display device such as a display screen.
The electronic device provided by the embodiment can be used for executing the compressor ultralow-temperature safe operation control method provided by the first embodiment, and has corresponding functions and beneficial effects.
Example five:
embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a compressor ultra-low temperature safe operation control method, the compressor ultra-low temperature safe operation control method including: presetting exhaust pressure thresholds corresponding to different suction pressures of a compressor, wherein the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary value is a maximum exhaust pressure value allowed by safe operation of the compressor corresponding to the different suction pressures; after the compressor is started, detecting a real-time suction pressure value and a real-time exhaust pressure value of the compressor, and determining a corresponding exhaust pressure threshold according to the real-time suction pressure value; and comparing the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, performing frequency adjustment on the compressor in a corresponding frequency adjustment mode according to the current frequency adjustment stage of the compressor so as to reduce the difference between the suction pressure and the exhaust pressure.
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations, e.g., in different computer systems connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium provided in the embodiments of the present application contains computer-executable instructions, and the computer-executable instructions are not limited to the compressor ultra-low temperature safe operation control method described above, and may also perform related operations in the compressor ultra-low temperature safe operation control method provided in any embodiments of the present application.
The compressor ultra-low temperature safe operation control device, the storage medium and the electronic device provided in the above embodiments can execute the compressor ultra-low temperature safe operation control method provided in any embodiment of the present application, and reference may be made to the compressor ultra-low temperature safe operation control method provided in any embodiment of the present application without detailed technical details described in the above embodiments.
The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. The present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the claims.
Claims (5)
1. The compressor ultralow-temperature safe operation control method is characterized by comprising the following steps:
presetting exhaust pressure thresholds corresponding to different suction pressures of a compressor, wherein the exhaust pressure thresholds are set according to exhaust pressure boundary value information, and the exhaust pressure boundary value is a maximum exhaust pressure value allowed by safe operation of the compressor corresponding to the different suction pressures;
after the compressor is started, detecting a real-time suction pressure value and a real-time exhaust pressure value of the compressor, and determining a corresponding exhaust pressure threshold according to the real-time suction pressure value;
comparing the real-time exhaust pressure value with the exhaust pressure threshold, and when the real-time exhaust pressure value reaches the exhaust pressure threshold, performing compressor frequency adjustment in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor to reduce the difference between the suction pressure and the exhaust pressure;
when the compressor is in a stable frequency stage, if the real-time suction pressure value is greater than or equal to the sum of the corresponding discharge pressure threshold value and a first preset positive deviation value, controlling the compressor to perform frequency reduction at a first preset speed until the real-time suction pressure value is less than the difference between the corresponding discharge pressure threshold value and a first preset negative deviation value, and stopping frequency reduction;
when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is greater than or equal to the sum of the corresponding discharge pressure threshold and a second preset positive deviation value, controlling the compressor to reduce the frequency at a second preset rate until the real-time suction pressure value is less than the difference between the corresponding discharge pressure threshold and a first preset negative deviation value, and stopping reducing the frequency;
when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is greater than or equal to the sum of the corresponding discharge pressure threshold and a third preset positive deviation value, controlling the compressor to reduce the frequency at a third preset rate until the real-time suction pressure value is less than the difference between the corresponding discharge pressure threshold and a first preset negative deviation value, and stopping reducing the frequency;
and when the compressor is in the frequency increasing stage, if the real-time suction pressure value is greater than or equal to the difference between the corresponding exhaust pressure threshold and a first preset negative deviation value, controlling the compressor to stop increasing the frequency.
2. The ultralow temperature safe operation control method for the compressor as claimed in claim 1, wherein before the preset exhaust pressure threshold corresponding to different suction pressures of the compressor, the method comprises:
acquiring a corresponding exhaust pressure boundary value when the suction pressure changes in a compressor operation safety experiment, and generating a compressor operation safety block diagram based on different suction pressures and the corresponding exhaust pressure boundary values;
correspondingly, in the preset exhaust pressure thresholds corresponding to the different suction pressures of the compressor, the exhaust pressure thresholds corresponding to the different suction pressures of the compressor are preset according to the compressor operation safety diagram.
3. The compressor ultra-low temperature safe operation control method as claimed in any one of claims 1-2, further comprising, after performing the frequency adjustment of the compressor by using a corresponding frequency adjustment manner according to the current frequency modulation stage of the compressor, the following steps:
and if the real-time exhaust pressure value cannot be lower than the exhaust pressure threshold value through the frequency adjustment of the compressor, judging that the control is abnormal, and outputting an abnormal prompt.
4. An electronic device, comprising:
a memory and one or more processors;
the memory to store one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the compressor ultra-low temperature safe operation control method as set forth in any one of claims 1 to 3.
5. A storage medium containing computer-executable instructions for performing the compressor ultra-low temperature safe operation control method as set forth in any one of claims 1 to 3 when executed by a computer processor.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062496A (en) * | 2009-11-18 | 2011-05-18 | Lg电子株式会社 | Heat pump |
| CN104034078A (en) * | 2013-03-04 | 2014-09-10 | 住友重机械工业株式会社 | Cryogenic refrigeration apparatus and method of controlling cryogenic refrigeration apparatus |
| CN105444448A (en) * | 2015-12-23 | 2016-03-30 | 广东美的暖通设备有限公司 | Refrigeration system and control method thereof |
| CN106642806A (en) * | 2016-10-31 | 2017-05-10 | 珠海格力电器股份有限公司 | Control method for controlling operation of compressor and heat pump unit |
| WO2017101658A1 (en) * | 2015-12-14 | 2017-06-22 | 珠海格力电器股份有限公司 | Two-stage compression air conditioning system and air replenishment control method therefor |
| CN107588573A (en) * | 2017-09-04 | 2018-01-16 | 广东美的暖通设备有限公司 | Air-conditioning, compressor protection method, computer equipment and readable storage medium storing program for executing |
-
2019
- 2019-10-14 CN CN201910974389.2A patent/CN112728821B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062496A (en) * | 2009-11-18 | 2011-05-18 | Lg电子株式会社 | Heat pump |
| CN104034078A (en) * | 2013-03-04 | 2014-09-10 | 住友重机械工业株式会社 | Cryogenic refrigeration apparatus and method of controlling cryogenic refrigeration apparatus |
| WO2017101658A1 (en) * | 2015-12-14 | 2017-06-22 | 珠海格力电器股份有限公司 | Two-stage compression air conditioning system and air replenishment control method therefor |
| CN105444448A (en) * | 2015-12-23 | 2016-03-30 | 广东美的暖通设备有限公司 | Refrigeration system and control method thereof |
| CN106642806A (en) * | 2016-10-31 | 2017-05-10 | 珠海格力电器股份有限公司 | Control method for controlling operation of compressor and heat pump unit |
| CN107588573A (en) * | 2017-09-04 | 2018-01-16 | 广东美的暖通设备有限公司 | Air-conditioning, compressor protection method, computer equipment and readable storage medium storing program for executing |
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