CN116292231A - Method and device for judging caliber of oil return hole and gas-liquid separator - Google Patents
Method and device for judging caliber of oil return hole and gas-liquid separator Download PDFInfo
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- CN116292231A CN116292231A CN202310246894.1A CN202310246894A CN116292231A CN 116292231 A CN116292231 A CN 116292231A CN 202310246894 A CN202310246894 A CN 202310246894A CN 116292231 A CN116292231 A CN 116292231A
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- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000003921 oil Substances 0.000 claims abstract description 297
- 238000003860 storage Methods 0.000 claims abstract description 18
- 239000010725 compressor oil Substances 0.000 claims abstract description 17
- 238000012797 qualification Methods 0.000 claims abstract description 16
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
- 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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- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The application relates to the technical field of intelligent air conditioners and discloses a method for judging the caliber of an oil return hole, which is applied to a gas-liquid separator of an air conditioner refrigerating system; the method comprises the following steps: under the condition that the air conditioner runs under preset conditions and the compressor is in a non-oil return stage, the exhaust temperature and the oil temperature of the compressor are obtained; and determining the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor. The method can determine the qualification condition of the caliber of the oil return hole through the exhaust temperature and the compressor oil temperature. Therefore, the air conditioner with the unqualified oil return hole caliber can be prevented from entering the market, and potential safety hazards of the air conditioner are eliminated. The application also discloses a device for judging the caliber of the oil return hole, a gas-liquid separator and a storage medium.
Description
Technical Field
The application relates to the technical field of intelligent air conditioners, and for example relates to a method and device for judging oil return hole caliber, a gas-liquid separator and a storage medium.
Background
The compressor is used as a core power component of an air conditioning system, and the size of the oil return hole caliber of the gas-liquid separator is important to the influence of the compressor. Too large or too small caliber of the oil return hole can lead to insufficient oil return of the compressor, further cause abrasion of the compressor and even cause potential safety hazard. The existing air conditioner control system has no obvious early warning about the abrasion caused by the lack of oil or the dilution of oil of the compressor, so that the problems of increased load of the compressor, cylinder clamping, carbonization of press oil and the like are caused.
The related art discloses a detection method of an oil return hole of a gas-liquid separator, which is applied to the technical field of air conditioners and comprises the following steps: injecting frozen oil into the gas-liquid separator to be tested, wherein the frozen oil covers an oil return hole of the gas-liquid separator to be tested, extracting the frozen oil in the gas-liquid separator to be tested by utilizing an air outlet pipe of the gas-liquid separator to be tested, detecting the flow rate when the frozen oil flows through the air outlet pipe of the gas-liquid separator to be tested, and judging whether the oil return hole of the gas-liquid separator to be tested is blocked or not based on the flow rate when the frozen oil is extracted from the air outlet pipe of the gas-liquid separator to be tested and the standard flow rate measured in advance, wherein the standard flow rate is the flow rate when the frozen oil is extracted from the air outlet pipe of the gas-liquid separator to be tested when the oil return hole of the gas-liquid separator to be tested is not blocked.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the related technology only detects the blocking condition of the oil return hole, and can not judge whether the caliber of the oil return hole is proper or not before the air conditioner leaves the factory, so that potential safety hazards exist in the air conditioner.
It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for judging the caliber of an oil return hole, a gas-liquid separator and a storage medium, so as to judge whether the caliber of the oil return hole meets the oil return requirement of a compressor or not, and further eliminate potential safety hazards of an air conditioner.
In some embodiments, the method comprises: under the condition that the compressor runs under preset conditions, the exhaust temperature and the oil temperature of the compressor are obtained; and determining the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the compressor oil temperature.
In some embodiments, the apparatus comprises: the oil return hole diameter judging device comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the method for judging the oil return hole diameter when the program instructions are executed.
In some embodiments, the gas-liquid separator comprises: a gas-liquid separator body; and the device for judging the caliber of the oil return hole is arranged on the gas-liquid separator body.
In some embodiments, the storage medium stores program instructions that, when executed, perform a method for determining oil gallery aperture as described above.
The method, the device, the gas-liquid separator and the storage medium for judging the caliber of the oil return hole provided by the embodiment of the disclosure can realize the following technical effects:
in the embodiment of the disclosure, the compressor is controlled to run under preset conditions, and the exhaust temperature and the oil temperature of the compressor are detected when the compressor is in a non-oil return stage. So as to judge whether the caliber of the oil return hole of the gas-liquid separator is proper. The oil amount of the compressor is abnormal due to the unsuitable caliber of the oil return hole, so that the exhaust temperature and the oil temperature of the compressor are abnormal. Therefore, the qualification condition of the caliber of the oil return hole can be determined through the exhaust temperature and the compressor oil temperature. Therefore, the air conditioner with the unqualified oil return hole caliber can be prevented from entering the market, and potential safety hazards of the air conditioner are eliminated.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a gas-liquid separator provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a method for determining the bore of an oil return hole according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for determining the bore of an oil return hole according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for determining the bore of an oil return hole according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of an apparatus for determining the bore of an oil return hole according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of another gas-liquid separator provided in an embodiment of the present disclosure.
Reference numerals:
20: an air outlet pipe; 30: an air inlet pipe; 40: an oil return hole; h: oil return hole height.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Referring to fig. 1, the gas-liquid separator separates refrigerant flowing back to the compressor from the evaporator into a gaseous refrigerant and a liquid refrigerant, and returns only the gaseous refrigerant to the compressor. Meanwhile, the separated liquid refrigerant is dissolved into oil, so that the oil needs to be returned to the compressor, the oil quantity in the compressor is ensured, and oil is supplied to a vortex part of the compressor. The gas-liquid separator includes a gas outlet pipe 20 and a gas inlet pipe 30. Wherein the air outlet pipe 20 is a U-shaped pipeline, and the lowest end of the air outlet pipe 20 is provided with an oil return hole 40. The liquid refrigerant having dissolved the oil returns to the compressor through the oil return hole 40.
The oil return hole is large, the oil return of the compressor is increased, but the liquid refrigerant flowing into the compressor is also increased. This causes the oil to be diluted (lubrication of the oil is reduced) and the scroll portion of the compressor to be abnormally worn, and the compressor may malfunction. The oil return hole is small, so that the liquid refrigerant flowing back to the compressor can be reduced, and meanwhile, the oil return is also reduced. This causes the compressor to be insufficiently supplied with oil, and abnormal wear occurs, resulting in malfunction of the compressor. Therefore, the caliber of the oil return hole needs to ensure that the oil quantity in the compressor is in a reasonable range.
In order to avoid potential safety hazards of an air conditioner, the embodiment of the disclosure judges whether the caliber of the oil return hole is proper or not before the air conditioner leaves a factory. Referring to fig. 1, an embodiment of the disclosure provides a method for determining an oil return hole caliber, including:
s101, when the air conditioner runs under preset conditions and the compressor is in a non-oil return stage, the processor acquires the exhaust temperature of the compressor and the oil temperature of the compressor;
s102, the processor determines the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor.
Here, in order to determine whether the oil return hole caliber of the designed gas-liquid separator is acceptable, the gas-liquid separator is installed in an air conditioner refrigerating system. The air conditioner is controlled to operate under a preset condition, and the preset condition refers to that the air conditioner operates for a period of time under a maximum load. The air conditioner operates at maximum load, and the amount of oil required for the compressor is maximized. In this case, if the oil return amount satisfies the compressor requirement, it can be determined that the oil return hole caliber of the gas-liquid separator is appropriate. Specifically, the discharge temperature of the compressor and the compressor oil temperature are obtained by detecting the temperature sensor while the compressor is in the non-oil return stage. And if the exhaust temperature of the compressor and the oil temperature of the compressor meet the requirements, indicating that the caliber of the oil return hole is qualified. If the exhaust temperature and the oil temperature of the compressor do not meet the requirements, the abnormal oil return of the compressor is indicated, and the abnormal operation parameters of the compressor are caused. At this time, it is determined that the oil return hole diameter is not acceptable.
In addition, the oil return stage is to recover the oil in the indoor unit and the refrigerant pipeline to the compressor. When the compressor returns oil, the compressor is controlled to raise the frequency, and the opening of the electronic expansion valve of the indoor unit and the opening of the electromagnetic valve of the outdoor unit are regulated to the maximum, so that the oil is quickly recovered to the gas-liquid separator. Therefore, when the compressor is in the oil return stage, the oil amount in the gas-liquid separator gradually increases, and the oil amount reaches the maximum value as the oil return stage is completed. In the oil return stage, oil is recovered to the gas-liquid separator, so that whether the oil supply amount of the gas-liquid separator to the compressor meets the requirement of the compressor cannot be accurately judged. Therefore, in the non-oil return stage, judgment is made on the discharge temperature and the compressor oil temperature. The non-oil return phase refers to a phase other than the oil return phase.
By adopting the method for judging the caliber of the oil return hole, which is provided by the embodiment of the disclosure, the compressor is controlled to run under the preset condition, and the exhaust temperature and the compressor oil temperature of the compressor are detected when the compressor is in the non-oil return stage. So as to judge whether the caliber of the oil return hole of the gas-liquid separator is proper. The oil amount of the compressor is abnormal due to the unsuitable caliber of the oil return hole, so that the exhaust temperature and the oil temperature of the compressor are abnormal. Therefore, the qualification condition of the caliber of the oil return hole can be determined through the exhaust temperature and the compressor oil temperature. Therefore, the air conditioner with the unqualified oil return hole caliber can be prevented from entering the market, and potential safety hazards of the air conditioner are eliminated.
Optionally, in step S101, the operation of the air conditioner under the preset condition includes:
and under the condition that the processor controls the air conditioner to operate in a refrigerating mode, and controls the compressor to operate at the highest frequency for a first time period, the air conditioner indoor unit operates at the maximum refrigerating capacity.
Here, the air conditioning operation cooling mode facilitates the circulation of the amount of oil in the refrigerant circulation circuit back to the compressor. After the air conditioner is stopped, the oil in the refrigerant circulation circuit is recovered to the indoor side, i.e., the indoor unit. If the heating mode is operated after the air conditioner is started, a large amount of oil is still stored in the indoor unit condenser. After the heat exchange of the condenser, the gaseous refrigerant is changed into a liquid refrigerant, and a large amount of oil exists in the liquid cold state. The gas-liquid separator sends the gaseous refrigerant to the compressor, while the oil is sent to the compressor with the gaseous refrigerant. At this time, less oil flows back to the compressor, and the oil in the liquid refrigerant needs to be returned to the compressor through the oil return hole. In this case, the oil amount of the compressor is required to be large, and therefore, whether the oil return hole diameter is acceptable cannot be determined more accurately. However, in the cooling mode, the indoor unit is an evaporator, and the refrigerant in the indoor unit changes from a liquid state to a gas state. That is, a large amount of oil in the indoor unit flows back to the compressor along with the gaseous refrigerant through the gas-liquid separator. In this case, the size of the oil return hole diameter is important for the oil return effect of the compressor. The oil supply requirement of the compressor on the oil return port is normal, so that the oil return port is helpful to judge whether the caliber of the oil return port is qualified.
Meanwhile, the compressor is controlled to operate at the highest frequency and the indoor unit is controlled to operate at the maximum refrigerating capacity. At this time, the amount of oil required for the compressor is the greatest, and the demand for oil supply and demand is the most stringent. If in this case the oil return hole caliber is able to meet the compressor oil return demand, the oil return hole caliber must be acceptable.
Optionally, the processor controls the air conditioner indoor unit to operate with the maximum refrigerating capacity, including:
when a plurality of indoor units of the air conditioner are provided, the processor controls all the indoor units to operate; and each indoor unit is controlled to operate according to the highest wind speed and the lowest temperature.
In the embodiment of the disclosure, the compressor is a scroll compressor and is mainly applied to a multi-split air conditioner. Therefore, in the multi-split air conditioner, controlling the indoor units to operate with the maximum refrigerating capacity comprises controlling all the indoor units to operate. And controls the indoor unit to operate according to the highest rotating speed and the lowest temperature. The minimum temperature is the minimum temperature allowed by the indoor unit under the test environment, such as 16 ℃. Thus, the recovery of the oil quantity in the refrigerant circulation loop is facilitated, and most of the oil is prevented from being stored in the refrigerant circulation loop. Further, in some embodiments, controlling the indoor unit to operate at the maximum cooling capacity includes operating more than a proportion of the indoor units, such as more than 50% of the indoor units.
Optionally, the processor determines the first time length by:
and the processor determines an oil return period corresponding to the current refrigeration load according to the corresponding relation between the refrigeration load and the oil return period, and takes the oil return period as a first duration.
Taking multi-split air conditioner as an example, the number of indoor units is more than 4, for example. If all the indoor units are started for refrigeration, the refrigeration load is 100%. If the three indoor units are started for refrigeration, the refrigeration load is 75%, and so on. The greater the refrigeration load, the longer the oil return period. The correspondence can be seen in table 1.
Table 1 correspondence table of load amount and oil return period
| Load amount | Oil return period (hours/h) |
| 100％ | A1 |
| 75％ | A2 |
| 50％ | A3 |
| 25％ | A4 |
Wherein A1 is greater than A2, A2 is greater than A3, and A3 is greater than A4. Alternatively, a1=2a2, a2=2a3, a3=2a4.
Thus, when the compressor is started to run for a first time period (namely before the compressor is started to return oil to the compressor), the exhaust temperature of the compressor and the oil temperature of the compressor are detected in real time so as to judge the qualification condition of the caliber of the oil return hole.
Optionally, the compressor is a low pressure cavity compressor; s102, determining the qualification condition of the caliber of the oil return hole by the processor according to the exhaust temperature and the oil temperature of the compressor, wherein the method comprises the following steps:
the processor determines that the oil return orifice aperture is acceptable in the event that the discharge temperature is greater than or equal to the first discharge temperature and less than or equal to the second discharge temperature, and the compressor oil temperature is greater than or equal to the current suction saturation temperature and less than or equal to the compressor oil temperature limit.
The working principle of the low-pressure cavity compressor is that the sucked low-temperature low-pressure gaseous refrigerant is directly sent into a closed cavity below the vortex plate and then compressed into high-temperature high-pressure refrigerant through the vortex plate. The high-temperature high-pressure refrigerant is directly discharged out of the compressor from the exhaust pipe above the vortex plate. In the process, the whole compressor shell is low in temperature, and the shell cavity (an exhaust port and an exhaust cavity) is low in pressure. In addition, the refrigerant and oil of the low pressure chamber compressor are separated; which uses an oil pump to forcibly supply oil. Therefore, the lubricating part can be quickly supplied with oil in time after starting, and the lubricating part is not influenced by pressure difference. The oil supply mode separates oil from high-temperature high-pressure gaseous refrigerant, so that the oil temperature is far lower than the exhaust temperature and higher than the suction temperature.
It is determined here whether the compressor oil temperature is greater than the current suction saturation temperature and less than or equal to the oil temperature limit value. The current inhalation saturation temperature is the current saturation temperature corresponding to the current inhalation pressure by detecting the current inhalation pressure and determining the corresponding relationship between the inhalation pressure and the saturation temperature. The oil temperature limit value refers to the limit temperature that the low pressure chamber compressor can withstand. Meanwhile, it is also necessary to determine whether the exhaust temperature of the compressor satisfies the corresponding condition. Wherein the exhaust temperature is a real-time exhaust temperature and the oil temperature is a real-time oil temperature. Specifically, the first exhaust temperature is increased based on a saturation temperature corresponding to the real-time exhaust temperature. The actual exhaust saturation temperature is Pd-t s The first temperature is DeltaT 1, and the first exhaust temperature Pd-T 1 ＝Pd-t s +Δt1. Wherein the value of DeltaT is 30-40 ℃, such as 35 ℃. Second exhaust temperature Pd-t 2 Is at the highest allowable discharge temperature Pd-t of the compressor h On the basis of subtracting the second temperature DeltaT 2, i.e. Pd-T 2 ＝Pd-t h Δt2. Wherein the value of DeltaT is 15-25 ℃, such as 20 ℃. And when the exhaust temperature and the oil temperature meet the conditions, determining that the aperture of the oil return orifice is qualified.
Optionally, the compressor is a high pressure cavity compressor; s102, determining the qualification condition of the caliber of the oil return hole by the processor according to the exhaust temperature and the oil temperature of the compressor, wherein the method comprises the following steps:
and under the condition that the exhaust temperature and the compressor oil temperature are both greater than or equal to the third exhaust temperature and less than or equal to the fourth exhaust temperature, the processor determines that the caliber of the oil return hole is qualified.
The working principle of the high-pressure cavity compressor is that the low-temperature low-pressure gaseous refrigerant is directly sent into the vortex plate for compression, and the high-temperature high-pressure refrigerant enters a closed cavity below the vortex plate and is then discharged from the exhaust port. In the process, the whole compressor shell is high-temperature, and the inside of the shell cavity (except the air suction port and the air suction cavity) is high-pressure. The high-pressure cavity compressor supplies oil to the bearing and the vortex plate by means of high-low pressure difference in the compressor. The oil and the refrigerant are not separated in the oil supply mode, so that the oil temperature is approximately equal to the exhaust temperature. Therefore, the oil temperature is also determined by the exhaust gas temperature parameter, that is, the oil temperature and the exhaust gas temperature are the same in determination condition. And the third exhaust temperature is increased based on the saturated temperature corresponding to the real-time exhaust temperature of the high-pressure cavity compressor according to the judgment parameters of the low-pressure cavity compressor. The actual exhaust saturation temperature was Pd-t' s The third temperature is DeltaT 3, and the third exhaust temperature Pd-T 3 ＝Pd-t’ s +Δt3. Wherein the value range of delta T3 is 30-40 ℃. Second exhaust temperature Pd-t 2 Is at the highest allowable exhaust temperature Pd-t 'of the high-pressure cavity compressor' h On the basis of (a) subtracting a fourth temperature DeltaT 4, i.e. Pd-T 4 ＝Pd-t’ h - Δt4. Wherein the value range of delta T is 15-25 ℃. And when the exhaust temperature and the oil temperature meet the conditions, determining that the aperture of the oil return orifice is qualified. In addition, the value of the first temperature may be the same as the value of the third temperature, and the value of the second temperature may be the same as the value of the fourth temperature.
Referring to fig. 3, another method for determining an oil return hole caliber according to an embodiment of the present disclosure includes:
s101, when the air conditioner is operated under preset conditions and the compressor is in a non-oil return stage, the processor acquires the exhaust temperature of the compressor and the oil temperature of the compressor.
S102, the processor determines the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor.
S203, under the condition that the caliber of the oil return hole is unqualified and the oil return stage of the compressor is completed, the processor acquires the oil level of the gas-liquid separator.
S204, when the oil level of the gas-liquid separator is higher than the oil return hole, and the duration is longer than the second duration, the processor determines that the caliber of the oil return hole is too small.
In the embodiment of the disclosure, after determining that the caliber of the oil return hole is unqualified, the air conditioner is controlled to keep the current operation parameters to continue to operate, so that the operation duration of the compressor is longer than the first duration. Thereby making the compressor enter an oil return stage and complete oil return, namely, recovering the oil in the indoor unit and the pipeline to the compressor. At this time, the amount of oil in the compressor is the largest. And detecting the oil level of the gas-liquid separator in real time, and judging whether the oil level is higher than the oil return hole. The height H of the oil return hole refers to the height from the center position of the oil return hole to the lowest end of the gas-liquid separator, and is shown in fig. 1. After the compressor finishes oil return, when the caliber of the oil return hole of the gas-liquid separator is qualified, the oil of the gas-liquid separator is sucked into the compressor. This results in the gas-liquid separator having an oil level less than or equal to the oil return height. Therefore, if the oil level of the gas-liquid separator is continuously higher than the oil return hole height in the second period, the oil return hole caliber of the gas-liquid separator is excessively small. Wherein the second time period takes 10-15 minutes. In addition, the qualified oil return hole caliber represents that the oil return hole caliber is in a preset range, the too small oil return hole caliber means that the oil return hole caliber is smaller than the minimum value of the preset range, and similarly, the too large oil return hole caliber means that the oil return hole caliber is larger than the maximum value of the preset range.
Referring to fig. 4, another method for determining an oil return hole caliber according to an embodiment of the present disclosure includes:
s101, when the air conditioner is operated under preset conditions and the compressor is in a non-oil return stage, the processor acquires the exhaust temperature of the compressor and the oil temperature of the compressor.
S102, the processor determines the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor.
S303, under the condition that the caliber of the oil return hole is determined to be unqualified and the oil return stage of the compressor is completed, the processor acquires the oil level position of the compressor.
And S304, under the condition that the oil level position of the compressor is lower than the lowest safe oil level position, the processor determines the disqualification condition of the oil return aperture according to the current exhaust temperature or the current oil level height of the gas-liquid separator.
In the embodiment of the disclosure, after determining that the caliber of the oil return hole is unqualified, the air conditioner is controlled to keep the current operation parameters to continue to operate, so that the operation duration of the compressor is longer than the first duration. Thereby making the compressor enter an oil return stage and complete oil return, namely, recovering the oil in the indoor unit and the pipeline to the compressor. At this time, the amount of oil in the compressor is the largest. And detecting the oil level height of the compressor in real time, wherein the oil level position of the compressor is higher than or equal to the lowest safe oil level position when the caliber of an oil return hole of the gas-liquid separator is qualified. The minimum safe oil level position refers to the position where the minimum oil amount does not cause wear of the compressor. Therefore, when the oil level position of the compressor is lower than the lowest safe oil level position, the oil return hole caliber is judged to be unqualified. And further judging whether the caliber of the oil return hole is too large or too small according to the current exhaust temperature of the compressor or the current oil level height of the gas-liquid separator.
Optionally, in step S304, the processor determines, according to the current exhaust temperature or the current oil level height of the gas-liquid separator, a failure condition of the oil return aperture, including:
under the condition that the current exhaust temperature is smaller than the fifth exhaust temperature, the processor determines that the caliber of the oil return hole is too large; or under the condition that the current oil level of the gas-liquid separator is higher than the oil return hole height and the duration is longer than the third duration, the processor determines that the caliber of the oil return hole is too small.
Here, the current exhaust temperature after the compressor returns oil is detected, and if the current exhaust temperature is smaller than the fifth exhaust temperature, the oil return hole caliber is too large. Wherein the fifth exhaust temperature Pd-t 5 Refers to the saturation temperature Pd-t corresponding to the current exhaust gas s "increase the first temperature on the basis of Pd-t 5 ＝Pd-t s "+Δt1. The liquid refrigerant flowing into the compressor becomes more due to the overlarge caliber of the oil return hole. Further, the exhaust temperature of the compressor is reduced, so that when the current exhaust temperature of the compressor is low, the caliber of the oil return hole of the gas-liquid separator is determined to be too large. In addition, whether the current oil level height of the gas-liquid separator is higher than the oil return hole height continuously for the third time can be judged, and if so, whether the caliber of the oil return hole is too small can be determined. Therefore, whether the caliber of the oil return hole is qualified or not can be determined, and whether the oil return hole is disqualified due to overlarge or undersize aperture can be judged.
The embodiment of the disclosure provides a device for judging the caliber of an oil return hole, which comprises an acquisition module and a determination module. The acquisition module is configured to acquire an exhaust temperature of the compressor and an oil temperature of the compressor when the air conditioner is operated under a preset condition and the compressor is in a non-oil return stage. The determining module is configured to determine the qualification condition of the oil return hole caliber according to the exhaust temperature and the compressor oil temperature.
By adopting the device for judging the caliber of the oil return hole, which is provided by the embodiment of the disclosure, the compressor is controlled to run under the preset condition, and when the compressor is in the non-oil return stage, the exhaust temperature of the compressor and the oil temperature of the compressor are detected. So as to judge whether the caliber of the oil return hole of the gas-liquid separator is proper. The oil amount of the compressor is abnormal due to the unsuitable caliber of the oil return hole, so that the exhaust temperature and the oil temperature of the compressor are abnormal. Therefore, the qualification condition of the caliber of the oil return hole can be determined through the exhaust temperature and the compressor oil temperature. Therefore, the air conditioner with the unqualified oil return hole caliber can be prevented from entering the market, and potential safety hazards of the air conditioner are eliminated.
Referring to fig. 5, an embodiment of the disclosure provides an apparatus 200 for determining an oil return hole caliber, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for determining the oil return hole caliber of the above embodiment.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the program instructions/modules stored in the memory 101 to perform the function application and the data processing, that is, to implement the method for determining the caliber of the oil return hole in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
As shown in connection with fig. 6, an embodiment of the present disclosure provides a gas-liquid separator 300, comprising: the gas-liquid separator body and the device 200 for judging the caliber of the oil return hole. The device 200 for determining the caliber of the oil return hole is mounted on the gas-liquid separator body. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the apparatus 200 for determining the bore of the oil return hole may be adapted to a viable product body to achieve other viable embodiments.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above method for determining an oil return hole caliber.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for judging the caliber of an oil return hole is applied to a gas-liquid separator of an air conditioner refrigerating system; characterized in that the method comprises:
under the condition that the air conditioner runs under preset conditions and the compressor is in a non-oil return stage, the exhaust temperature and the oil temperature of the compressor are obtained;
and determining the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor.
2. The method of claim 1, wherein the air conditioner operating at a preset condition comprises:
under the condition of an air conditioner operation refrigeration mode, controlling a compressor to operate at the highest frequency for a first time period; and controls the indoor unit of the air conditioner to operate at the maximum cooling capacity.
3. The method of claim 1, wherein the compressor is a low pressure cavity compressor; determining the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor, comprising the following steps:
and determining that the caliber of the oil return hole is qualified under the condition that the exhaust temperature is greater than or equal to the first exhaust temperature and less than or equal to the second exhaust temperature and the compressor oil temperature is greater than or equal to the current suction saturation temperature and less than or equal to the limit value of the compressor oil temperature.
4. The method of claim 1, wherein the compressor is a high pressure cavity compressor; determining the qualification condition of the caliber of the oil return hole according to the exhaust temperature and the oil temperature of the compressor, comprising the following steps:
and under the condition that the exhaust temperature and the compressor oil temperature are both greater than or equal to the third exhaust temperature and less than or equal to the fourth exhaust temperature, determining that the caliber of the oil return hole is qualified.
5. The method according to any one of claims 1 to 4, wherein in the case where it is determined that the oil return hole diameter is not acceptable, the method further comprises:
under the condition that the compressor finishes oil return, acquiring the oil level of the gas-liquid separator;
and determining that the caliber of the oil return hole is too small under the condition that the oil level of the gas-liquid separator is higher than the oil return hole and the duration is longer than the second duration.
6. The method according to any one of claims 1 to 4, wherein in the case where it is determined that the oil return hole diameter is not acceptable, the method further comprises:
under the condition that the compressor finishes oil return, acquiring the oil level position of the compressor;
and under the condition that the oil level position of the compressor is lower than the lowest safe oil level position, determining the disqualification condition of the caliber of the oil return hole according to the current exhaust temperature or the current oil level height of the gas-liquid separator.
7. The method of claim 6, wherein determining the failure condition of the oil gallery caliber based on the current exhaust gas temperature or the current oil level height of the gas-liquid separator comprises:
under the condition that the current exhaust temperature is smaller than the fifth exhaust temperature, determining that the caliber of the oil return hole is too large; or alternatively, the first and second heat exchangers may be,
and determining that the caliber of the oil return hole is too small under the condition that the current oil level of the gas-liquid separator is higher than the oil return hole and the duration is longer than the third duration.
8. An apparatus for determining an oil return bore diameter comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for determining an oil return bore diameter of any one of claims 1 to 7 when the program instructions are run.
9. A gas-liquid separator, comprising:
a gas-liquid separator body;
the apparatus for determining an oil return hole diameter according to claim 8, mounted to the gas-liquid separator body.
10. A storage medium storing program instructions which, when executed, perform the method for determining the bore diameter of an oil return hole as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310246894.1A CN116292231A (en) | 2023-03-15 | 2023-03-15 | Method and device for judging caliber of oil return hole and gas-liquid separator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310246894.1A CN116292231A (en) | 2023-03-15 | 2023-03-15 | Method and device for judging caliber of oil return hole and gas-liquid separator |
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| CN116292231A true CN116292231A (en) | 2023-06-23 |
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| CN202310246894.1A Pending CN116292231A (en) | 2023-03-15 | 2023-03-15 | Method and device for judging caliber of oil return hole and gas-liquid separator |
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| CN (1) | CN116292231A (en) |
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