CN112664455A - Lubrication adjusting method and device for compressor, electronic equipment and storage medium - Google Patents

Lubrication adjusting method and device for compressor, electronic equipment and storage medium Download PDF

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Publication number
CN112664455A
CN112664455A CN201910980365.8A CN201910980365A CN112664455A CN 112664455 A CN112664455 A CN 112664455A CN 201910980365 A CN201910980365 A CN 201910980365A CN 112664455 A CN112664455 A CN 112664455A
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China
Prior art keywords
compressor
suction pressure
frequency
adjusting
real
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CN201910980365.8A
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Chinese (zh)
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CN112664455B (en
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刘志力
雷朋飞
吴思朗
叶景发
李操炫
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Guangdong PHNIX Eco Energy Solution Ltd
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Guangdong PHNIX Eco Energy Solution Ltd
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Priority to CN201910980365.8A priority Critical patent/CN112664455B/en
Priority to PCT/CN2019/124782 priority patent/WO2021072954A1/en
Publication of CN112664455A publication Critical patent/CN112664455A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the application discloses a method and a device for lubricating and adjusting a compressor, electronic equipment and a storage medium. According to the embodiment of the application, the suction pressure threshold value of the compressor is preset, the real-time suction pressure value of the compressor is detected after the compressor is started, and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, the frequency of the compressor is adjusted by adopting a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and the electronic expansion valve of the compressor is adjusted. By adopting the technical means, the real-time suction pressure value of the compressor can be improved, the real-time suction pressure of the compressor is improved, the refrigerant flow of the compressor can be increased, and then the refrigerant can bring back enough lubricating oil, so that the condition that the compressor breaks down or even burns down due to poor lubrication is avoided.

Description

Lubrication adjusting method and device for compressor, electronic equipment and storage medium
Technical Field
The embodiment of the application relates to the technical field of compressors, in particular to a lubricating and adjusting method and device of a compressor, electronic equipment and a storage medium.
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 the compressor capable of stably running 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 the operation characteristics of the heat pump, when the heat pump is operated in an ultra-low temperature environment, the suction pressure of the compressor is relatively low, and the refrigerant flow rate is relatively low. Further, in the case of frosting, the suction pressure of the compressor is reduced, and the refrigerant flow rate is further reduced. And under the condition that the refrigerant flow is less, then can't bring back sufficient lubricating oil for the compressor, lead to the compressor lubrication failure, and then lead to the problem of heat pump trouble, influence user's use and experience.
Disclosure of Invention
The embodiment of the application provides a lubricating and adjusting method and device for a compressor, electronic equipment and a storage medium, and can solve the problem that when the compressor runs at an ultralow temperature, the flow of a refrigerant is small, and realize operation control over the suction pressure of the compressor.
In a first aspect, an embodiment of the present application provides a lubrication adjustment method for a compressor, including:
presetting a suction pressure threshold of a compressor, wherein the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor;
after the compressor is started, detecting a real-time suction pressure value of the compressor, and comparing the detected real-time suction pressure value with a suction pressure threshold value;
and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and adjusting an electronic expansion valve of the compressor to improve the real-time suction pressure value.
Further, when the real-time suction pressure value is less than or equal to the suction pressure threshold value, adjusting the frequency of the compressor by adopting a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, and adjusting the electronic expansion valve of the compressor, the method comprises the following steps:
and when the compressor is in the frequency rising stage, if the real-time suction pressure value is less than or equal to the sum of the suction pressure threshold value and a first preset positive deviation value, controlling the compressor to stop raising the frequency, and adjusting the electronic expansion valve according to the superheat degree.
Further, when the real-time suction pressure value is less than or equal to the suction pressure threshold, adjusting the frequency of the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, and adjusting the electronic expansion valve of the compressor, the method further includes:
and when the compressor is in a stable frequency stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and a first preset negative deviation value, controlling the compressor to reduce the frequency at a first preset rate.
Further, when the real-time suction pressure value is less than or equal to the suction pressure threshold, adjusting the frequency of the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, and adjusting the electronic expansion valve of the compressor, the method 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 smaller than the difference between the suction pressure threshold and a second preset negative deviation value, controlling the compressor to reduce the frequency at a second preset speed.
Further, when the real-time suction pressure value is less than or equal to the suction pressure threshold, adjusting the frequency of the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, and adjusting the electronic expansion valve of the compressor, the method 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 smaller than the difference between the suction pressure threshold and a third preset negative deviation value, controlling the compressor to reduce the frequency at a third preset speed.
Further, when the real-time suction pressure value is less than or equal to the suction pressure threshold, adjusting the frequency of the compressor in a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, and adjusting the electronic expansion valve of the compressor, the method further includes:
and detecting the difference value between the current compressor exhaust temperature and the condensation temperature corresponding to the compressor exhaust pressure, controlling the electronic expansion valve to be opened at a corresponding speed and step by step at a corresponding frequency modulation stage when the difference value is greater than or equal to a preset threshold value, and stopping reducing the frequency and opening the valve until the real-time suction pressure value is greater than the sum of the suction pressure threshold value and a first preset positive deviation value.
Further, after adjusting the electronic expansion valve of the compressor by adopting a corresponding frequency adjustment mode according to the current frequency modulation stage of the compressor, the method further comprises the following steps:
and after the set time period, if the real-time suction pressure value is still less than or equal to the suction pressure threshold, judging that the control is abnormal, and outputting an abnormal prompt.
In a second aspect, an embodiment of the present application provides a lubrication adjustment device of a compressor, including:
the device comprises a setting module, a control module and a control module, wherein the setting module is used for presetting a suction pressure threshold of the compressor, and the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor;
the comparison module is used for detecting a real-time suction pressure value of the compressor after the compressor is started and comparing the detected real-time suction pressure value with the suction pressure threshold value;
and the adjusting module is used for adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency modulation stage of the compressor when the real-time suction pressure value is less than or equal to the suction pressure threshold value, and adjusting the electronic expansion valve of the compressor so as to improve the real-time suction pressure value.
In a third aspect, an embodiment of the present application provides an electronic device, including:
a memory and one or more processors;
the memory for storing 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 lubrication adjustment method for a compressor 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 method of lubrication conditioning of a compressor as described in the first aspect when executed by a computer processor.
According to the embodiment of the application, the suction pressure threshold value of the compressor is preset, the real-time suction pressure value of the compressor is detected after the compressor is started, and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, the frequency of the compressor is adjusted by adopting a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and the electronic expansion valve of the compressor is adjusted. By adopting the technical means, the real-time suction pressure value of the compressor can be improved, the real-time suction pressure of the compressor is improved, the refrigerant flow of the compressor can be increased, and then the refrigerant can bring back enough lubricating oil, so that the condition that the compressor breaks down or even burns down due to poor lubrication is avoided.
Drawings
FIG. 1 is a flow chart illustrating a method for regulating lubrication of a compressor according to an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating another method for regulating lubrication of a compressor according to a second embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a lubrication adjustment 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 may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The application provides a lubrication adjusting method of a compressor, aims at improving the suction pressure of the compressor through the suction pressure adjustment of the compressor, and increases the flow of a refrigerant entering the compressor through improving the suction pressure of the compressor. In the operation process of the existing compressor, due to the fact that no good lubrication adjustment is carried out, under the condition that the suction pressure of the compressor is too low, the condition that oil supply in the compressor is not smooth or oil return cannot be carried out during suction can be caused, and the compressor is poor in lubrication. Particularly, when the compressor operates in an ultra-low temperature environment, the suction pressure of the compressor is relatively low, and when frost forms, the suction pressure of the compressor is further reduced, so that poor lubrication of the compressor often occurs when the compressor operates in the ultra-low temperature environment. Therefore, the lubrication adjusting method of the compressor provided by the embodiment of the application is provided to solve the technical problem that poor lubrication is caused by too low suction pressure of the existing compressor.
The first embodiment is as follows:
fig. 1 is a flowchart illustrating a lubrication adjustment method of a compressor according to an embodiment of the present invention, where the lubrication adjustment method of the compressor provided in this embodiment may be performed by a lubrication adjustment device of the compressor, the lubrication adjustment device of the compressor may be implemented by software and/or hardware, and the lubrication adjustment device of the compressor may be formed by two or more physical entities or may be formed by one physical entity. Generally, the lubrication regulating device of the compressor may be a compressor main control device.
The following description will be given taking a lubrication adjusting apparatus of a compressor as an example of an apparatus for performing a lubrication adjusting method of a compressor. Referring to fig. 1, the lubrication adjusting method of the compressor specifically includes:
s110, presetting a suction pressure threshold of the compressor, wherein the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor.
In order to realize the adjustment of the real-time suction pressure of the compressor, the real-time suction pressure of the compressor is improved. A suction pressure threshold of the compressor needs to be preset to provide a comparison standard. The suction pressure threshold value of the compressor is the minimum suction pressure value allowed by the safe operation of the compressor, and the minimum suction pressure threshold value is determined according to the safe operation experiment of the compressor. A suction pressure boundary value, namely a minimum suction pressure value, of the compressor with normal lubrication is determined through actual experimental data, and the minimum suction pressure value is used as a suction pressure threshold value of the compressor. It can be understood that when the real-time suction pressure of the compressor is greater than the suction pressure threshold, it indicates that the current suction pressure of the compressor is normal, and the refrigerant can bring back a sufficient amount of lubricating oil; when the real-time suction pressure of the compressor is less than the suction pressure threshold, the suction pressure of the compressor needs to be adjusted to avoid the condition of poor lubrication of the compressor.
S120, after the compressor is started, detecting a real-time suction pressure value of the compressor, and comparing the detected real-time suction pressure value with the suction pressure threshold value.
Specifically, after the compressor is started, the lubrication regulating device of the compressor detects the real-time suction pressure value of the compressor in real time based on the suction pressure threshold, compares the detected real-time suction pressure value with the suction pressure threshold, and judges whether the real-time pressure value of the compressor is smaller than the suction pressure threshold of the compressor. It should be noted that, in the embodiment of the present application, the suction pressure of the compressor may be collected according to an air pressure sensor disposed at an air inlet of the compressor. There are many ways to collect the suction pressure of the compressor, and the embodiment of the present application is not limited.
Further, when the compressor is operated, the real-time suction pressure value P of the air inlet of the compressor is detectedsAnd extracting the compressor suction pressure threshold value PsminAnd comparing the two pressure values to judge whether the real-time suction pressure of the current compressor is too low. In addition, in the comparison process, the suction pressure threshold value P of the compressor under the condition of different frequency adjustment is consideredsminTherefore, the embodiment of the application considers the influence of the deviation of the suction pressure threshold value, sets different deviation values at different frequency adjusting stages, and compares the real-time suction pressure of the compressor with the sum of the suction pressure threshold value of the compressor and the corresponding deviation value during comparison, so that the comparison of the real-time exhaust pressure is more accurate, and the influence of the deviation on the suction pressure adjustment of the compressor is avoided.
And S130, when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and adjusting an electronic expansion valve of the compressor to improve the real-time suction pressure value.
Specifically, when the real-time suction pressure value of the compressor is compared with the suction pressure threshold value, if the real-time suction pressure value of the compressor is larger than the suction pressure threshold value, it is indicated that the suction pressure of the current compressor is normal, and the internal lubrication of the compressor is normal. If the real-time suction pressure value of the compressor is smaller than or equal to the suction pressure threshold value, it is indicated that the suction pressure of the current compressor is too small, the condition of poor lubrication caused by small refrigerant flow is easy to occur, and the suction pressure of the compressor needs to be adjusted. And when the real-time suction pressure value is less than or equal to the suction pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and adjusting the electronic expansion valve of the compressor. During the operation of the compressor, the suction pressure of the compressor can be adjusted through the adjustment of the operation frequency of the compressor. Similarly, the suction pressure of the compressor can be adjusted by adjusting the opening of the electronic expansion valve of the compressor. Specifically, the running frequency of the compressor is reduced, or the electronic expansion valve of the compressor is enlarged, so that the real-time suction pressure value of the compressor is improved, and further the lubrication inside the compressor is adjusted.
In addition, when the real-time suction pressure value is less than or equal to the suction pressure threshold value and the compressor performs frequency adjustment, different frequency adjustment rates are required to perform the frequency adjustment of the compressor corresponding to different frequency adjustment stages. The different frequency modulation rates are adopted on one hand to improve the real-time suction pressure of the compressor as soon as possible through frequency adjustment of the compressor, and on the other hand, the fluctuation of the frequency of the compressor is relatively stable during the frequency adjustment, and the phenomenon that the operation of the compressor is influenced due to overlarge frequency fluctuation is avoided.
Illustratively, when the compressor is in the frequency rising stage, if the real-time suction pressure value is less than or equal to the sum of the suction pressure threshold value and the first preset positive deviation value, the compressor is controlled to stop frequency rising, and the electronic expansion valve is adjusted according to the superheat degree. When the compressor is in a stable frequency stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and the first preset negative deviation value, the compressor is controlled to carry out frequency reduction at a first preset speed. And when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and the second preset negative deviation value, controlling the compressor to reduce the frequency at a second preset speed. And when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and a third preset negative deviation value, controlling the compressor to reduce the frequency at a third preset speed. And at each frequency modulation stage, the electronic expansion valve of the compressor is adjusted at the same time. And controlling the electronic expansion valve to be opened at a corresponding speed and step by detecting the difference between the current compressor exhaust temperature and the condensation temperature corresponding to the compressor exhaust pressure when the difference is greater than or equal to a preset threshold, and stopping reducing the frequency and opening the valve until the real-time suction pressure value is greater than the sum of the suction pressure threshold and a first preset positive deviation value.
For example, assume that the first predetermined positive deviation value a is 0.1, the first predetermined negative deviation value b is 0.1, the second predetermined negative deviation value c is 0.2, the third predetermined negative deviation value d is 0.3, and the compressor suction pressure threshold P is equal tosminIs 1. P is detected while the compressor is in the up-conversion stage, corresponding to the different frequency regulation stagess≤Psmin+ a, i.e. PsAnd when the frequency of the compressor is less than 1.1, stopping increasing the frequency of the compressor, controlling the electronic expansion valve to adjust according to the superheat degree, and adjusting the opening degree of the electronic expansion valve to enable the superheat degree of the compressor to reach a preset value. Thereby adjusting the suction pressure of the compressor.
Detecting P when the compressor is in a stable frequency phasesmin-c≤Ps＜PsminB, i.e. PsLess than 0.9 and greater than 0.8, and the compressor is controlled to down convert at the first preset speed S1. And detecting the difference value between the current compressor exhaust temperature and the condensation temperature corresponding to the compressor exhaust pressure, wherein when the difference value is more than or equal to Td(preset threshold), the electronic expansion valve is controlled to be opened at the speed E _ S1 and at the step E _ N1. And detecting the suction pressure of the compressor in real time until PsAnd if the frequency is larger than 1.1, stopping the frequency reduction and opening the valve. The threshold value corresponding to the difference value of the exhaust temperature of the compressor and the condensing temperature corresponding to the exhaust pressure of the compressor is set by setting the threshold value according to the temperature difference threshold value of the liquid return condition after the electronic expansion valve of the compressor is opened, so that the liquid return risk is avoided in the adjustment process of the electronic expansion valve.
P is detected when the compressor is in a stable frequency or down-conversion phasesmin-d≤Ps＜PsminC is PsLess than 0.8 and greater than 0.7, and the compressor is controlled to down convert at the second preset speed S2. And areAnd detecting the difference value between the current compressor exhaust temperature and the condensation temperature corresponding to the compressor exhaust pressure, wherein when the difference value is more than or equal to Td(preset threshold), the electronic expansion valve is controlled to be opened at the speed E _ S2 and at the step E _ N2. Up to PsAnd when the frequency is larger than 1.1, stopping down-conversion and opening the valve.
P is detected when the compressor is in a stable frequency or down-conversion phases＜PsminD, i.e. PsAnd when the frequency is less than 0.7, controlling the compressor to perform frequency reduction at a third preset speed S3. And detecting the difference value between the current compressor exhaust temperature and the condensation temperature corresponding to the compressor exhaust pressure, wherein when the difference value is more than or equal to Td(preset threshold), the electronic expansion valve is controlled to be opened at the speed E _ S3 and at the step E _ N3. Up to PsAnd when the frequency is larger than 1.1, stopping the frequency reduction and opening the valve.
It should be noted that, when the electronic expansion valve of the compressor performs opening degree adjustment, different speed and step adjustments are adopted according to different frequency adjustment stages. The method aims to minimize system pressure fluctuation in the process of adjusting the compressor and avoid abnormal use of the compressor caused by overlarge pressure fluctuation. The opening speed and the step of the electronic expansion valve are measured according to an actual experiment, and the optimal speed and step are measured by adjusting the electronic expansion valve of the compressor at different frequency modulation stages and are used as the preset speed and the opening step when the opening of the electronic expansion valve of the compressor is adjusted at the subsequent corresponding frequency modulation stage.
Finally, the suction pressure of the compressor is adjusted in different stages by adopting corresponding adjusting modes, so that the real-time suction pressure of the compressor is greater than the sum of the suction pressure threshold of the compressor and a first preset positive deviation value, and the current suction pressure can meet the requirement that the refrigerant brings back enough lubricating oil.
The suction pressure threshold value of the compressor is preset, the real-time suction pressure value of the compressor is detected after the compressor is started, and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, the frequency of the compressor is adjusted by adopting a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and the electronic expansion valve of the compressor is adjusted. By adopting the technical means, the real-time suction pressure value of the compressor can be improved, the real-time suction pressure of the compressor is improved, the refrigerant flow of the compressor can be increased, and then the refrigerant can bring back enough lubricating oil, so that the condition that the compressor breaks down or even burns down due to poor lubrication is avoided.
Example two:
on the basis of the above embodiments, fig. 2 is a flowchart of another lubrication adjusting method for a compressor according to a second embodiment of the present application. Referring to fig. 2, the method for adjusting lubrication of a compressor provided in this embodiment specifically includes:
s210, presetting a suction pressure threshold of the compressor, wherein the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor;
s220, after the compressor is started, detecting a real-time suction pressure value of the compressor, and comparing the detected real-time suction pressure value with the suction pressure threshold value;
s230, when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and adjusting an electronic expansion valve of the compressor to improve the real-time suction pressure value;
and S240, after a set time period, if the real-time air suction pressure value is still less than or equal to the air suction pressure threshold value, judging that the control is abnormal, and outputting an abnormal prompt.
According to the embodiment of the application, after the compressor adjusts the suction pressure, the suction pressure of the compressor is detected in real time, the real-time suction pressure value is compared with the suction pressure threshold value again, if the suction pressure value of the compressor cannot be improved no matter how the compressor is adjusted within the set time, the compressor is judged to be abnormal in suction pressure adjustment control, and an abnormal prompt is output. 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 compressor is used for adjusting the suction pressure, whether the real-time suction pressure value is larger than the suction pressure threshold value or not is judged through judging whether the suction pressure adjustment of the compressor is carried out, whether the suction pressure adjustment control of the compressor is effective or not is determined, if the suction pressure adjustment control is invalid, an abnormal prompt of the suction pressure adjustment control is output, related personnel are timely reminded to maintain, 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 foregoing embodiments, fig. 3 is a schematic structural diagram of a lubrication adjustment device of a compressor according to a third embodiment of the present application. Referring to fig. 3, the lubrication adjusting apparatus of a compressor provided in this embodiment specifically includes: the device comprises a setting module, a comparison module and an adjusting module.
The setting module 31 is configured to preset a suction pressure threshold of the compressor, where the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor;
the comparison module 32 is configured to detect a real-time suction pressure value of the compressor after the compressor is started, and compare the detected real-time suction pressure value with the suction pressure threshold;
the adjusting module 33 is configured to, when the real-time suction pressure value is less than or equal to the suction pressure threshold value, adjust the frequency of the compressor in a corresponding frequency adjustment manner according to a current frequency modulation stage of the compressor, and adjust the electronic expansion valve of the compressor to increase the real-time suction pressure value.
The suction pressure threshold value of the compressor is preset, the real-time suction pressure value of the compressor is detected after the compressor is started, and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, the frequency of the compressor is adjusted by adopting a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and the electronic expansion valve of the compressor is adjusted. By adopting the technical means, the real-time suction pressure value of the compressor can be improved, the real-time suction pressure of the compressor is improved, the refrigerant flow of the compressor can be increased, and then the refrigerant can bring back enough lubricating oil, so that the condition that the compressor breaks down or even burns down due to poor lubrication is avoided.
Specifically, the adjusting module comprises a first adjusting unit, and is configured to control the compressor to stop raising the frequency and adjust the electronic expansion valve according to the superheat degree if the real-time suction pressure value is less than or equal to the sum of the suction pressure threshold and a first preset positive deviation value when the compressor is in a frequency raising stage.
And the second adjusting unit is used for controlling the compressor to reduce the frequency according to a first preset speed if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and the first preset negative deviation value when the compressor is in a stable frequency stage.
And the third adjusting unit is used for controlling the compressor to carry out frequency reduction at a second preset speed if the real-time suction pressure value is smaller than the difference between the suction pressure threshold and a second preset negative deviation value when the compressor is in a stable frequency stage or a frequency reduction stage.
And the fourth adjusting unit is used for controlling the compressor to carry out frequency reduction according to a third preset speed if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and a third preset negative deviation value when the compressor is in a stable frequency stage or a frequency reduction stage.
And the fifth adjusting unit is used for detecting the difference value between the current compressor exhaust temperature and the condensing temperature corresponding to the compressor exhaust pressure, controlling the electronic expansion valve to be opened at a corresponding speed and step by step in a corresponding frequency modulation stage when the difference value is larger than or equal to a preset threshold value, and stopping reducing the frequency and opening the valve until the real-time suction pressure value is larger than the sum of the suction pressure threshold value and a first preset positive deviation value.
Specifically, the control device further comprises a prompting module, wherein the prompting module is used for judging that the control is abnormal and outputting an abnormal prompt if the real-time air suction pressure value is still smaller than or equal to the air suction pressure threshold value after a set time period.
The lubrication adjusting device of the compressor provided by the third embodiment of the present application can be used for executing the lubrication adjusting method of the compressor 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 a computer readable storage medium, and can be used for storing software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the lubrication adjustment method of the compressor according to any embodiment of the present application (for example, a setting module, a comparison module, and an adjustment module in the lubrication adjustment device of the compressor). 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 located remotely from the processor, and these remote memories may be connected to the device over 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 device by executing software programs, instructions and modules stored in the memory, that is, implements the lubrication regulation method of the compressor described above.
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 above can be used to execute the lubrication adjustment method of the compressor provided in the first and second embodiments above, and has corresponding functions and advantages.
Example five:
embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a lubrication regulation method of a compressor, the lubrication regulation method of the compressor including: presetting a suction pressure threshold of a compressor, wherein the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor; after the compressor is started, detecting a real-time suction pressure value of the compressor, and comparing the detected real-time suction pressure value with a suction pressure threshold value; and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and adjusting an electronic expansion valve of the compressor to improve the real-time suction pressure value.
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 lubrication regulation method of the compressor described above, and may also perform related operations in the lubrication regulation method of the compressor provided in any embodiments of the present application.
The lubrication adjusting device, the storage medium and the electronic device of the compressor provided in the above embodiments may perform the lubrication adjusting method of the compressor provided in any embodiment of the present application, and reference may be made to the lubrication adjusting method of the compressor 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 (10)

1. A lubrication adjustment method of a compressor, comprising:
presetting a suction pressure threshold of a compressor, wherein the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor;
after the compressor is started, detecting a real-time suction pressure value of the compressor, and comparing the detected real-time suction pressure value with a suction pressure threshold value;
and when the real-time suction pressure value is smaller than or equal to the suction pressure threshold value, adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency adjusting stage of the compressor, and adjusting an electronic expansion valve of the compressor to improve the real-time suction pressure value.
2. The method for adjusting the lubrication of a compressor according to claim 1, wherein when the real-time suction pressure value is less than or equal to the suction pressure threshold value, the method for adjusting the frequency of the compressor and adjusting the electronic expansion valve of the compressor by using a corresponding frequency adjustment manner according to the current frequency modulation stage of the compressor comprises:
and when the compressor is in the frequency rising stage, if the real-time suction pressure value is less than or equal to the sum of the suction pressure threshold value and a first preset positive deviation value, controlling the compressor to stop raising the frequency, and adjusting the electronic expansion valve according to the superheat degree.
3. The method for adjusting the lubrication of a compressor according to claim 2, wherein when the real-time suction pressure value is less than or equal to the suction pressure threshold value, the method for adjusting the frequency of the compressor and adjusting the electronic expansion valve of the compressor by using a corresponding frequency adjustment method according to the current frequency modulation stage of the compressor further comprises:
and when the compressor is in a stable frequency stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold value and a first preset negative deviation value, controlling the compressor to reduce the frequency at a first preset rate.
4. The method for adjusting the lubrication of a compressor according to claim 3, wherein when the real-time suction pressure value is less than or equal to the suction pressure threshold value, the method for adjusting the frequency of the compressor and adjusting the electronic expansion valve of the compressor by using a corresponding frequency adjustment method according to the current frequency modulation stage of the compressor further comprises:
and when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold and a second preset negative deviation value, controlling the compressor to reduce the frequency at a second preset speed.
5. The method for adjusting the lubrication of a compressor according to claim 4, wherein when the real-time suction pressure value is less than or equal to the suction pressure threshold value, the method for adjusting the frequency of the compressor and adjusting the electronic expansion valve of the compressor by using a corresponding frequency adjustment method according to the current frequency modulation stage of the compressor further comprises:
and when the compressor is in a stable frequency stage or a frequency reduction stage, if the real-time suction pressure value is smaller than the difference between the suction pressure threshold and a third preset negative deviation value, controlling the compressor to reduce the frequency at a third preset speed.
6. The method for adjusting the lubrication of a compressor according to any one of claims 3 to 5, wherein when the real-time suction pressure value is less than or equal to the suction pressure threshold value, the method for adjusting the frequency of the compressor and adjusting the electronic expansion valve of the compressor by using a corresponding frequency adjustment method according to the current frequency modulation stage of the compressor further comprises:
and detecting the difference value between the current compressor exhaust temperature and the condensation temperature corresponding to the compressor exhaust pressure, controlling the electronic expansion valve to be opened at a corresponding speed and step by step at a corresponding frequency modulation stage when the difference value is greater than or equal to a preset threshold value, and stopping reducing the frequency and opening the valve until the real-time suction pressure value is greater than the sum of the suction pressure threshold value and a first preset positive deviation value.
7. The method for adjusting the lubrication of a compressor according to claim 1, wherein after the frequency adjustment of the compressor is performed by using a corresponding frequency adjustment method according to a current frequency adjustment stage of the compressor, and the electronic expansion valve of the compressor is adjusted, the method further comprises:
and after the set time period, if the real-time suction pressure value is still less than or equal to the suction pressure threshold, judging that the control is abnormal, and outputting an abnormal prompt.
8. A lubrication adjustment device for a compressor, comprising:
the device comprises a setting module, a control module and a control module, wherein the setting module is used for presetting a suction pressure threshold of the compressor, and the suction pressure threshold is a minimum suction pressure value allowed by safe operation of the compressor;
the comparison module is used for detecting a real-time suction pressure value of the compressor after the compressor is started and comparing the detected real-time suction pressure value with the suction pressure threshold value;
and the adjusting module is used for adjusting the frequency of the compressor in a corresponding frequency adjusting mode according to the current frequency modulation stage of the compressor when the real-time suction pressure value is less than or equal to the suction pressure threshold value, and adjusting the electronic expansion valve of the compressor so as to improve the real-time suction pressure value.
9. An electronic device, comprising:
a memory and one or more processors;
the memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method of lubrication regulation for a compressor as recited in any one of claims 1-7.
10. A storage medium containing computer executable instructions for performing a method of lubrication conditioning of a compressor as claimed in any one of claims 1 to 7 when executed by a computer processor.
CN201910980365.8A 2019-10-15 2019-10-15 Lubrication adjusting method and device for compressor, electronic equipment and storage medium Active CN112664455B (en)

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