CN107288886A - A kind of low-pressure cavity compressor system and its oil level control method - Google Patents
A kind of low-pressure cavity compressor system and its oil level control method Download PDFInfo
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- CN107288886A CN107288886A CN201710457386.2A CN201710457386A CN107288886A CN 107288886 A CN107288886 A CN 107288886A CN 201710457386 A CN201710457386 A CN 201710457386A CN 107288886 A CN107288886 A CN 107288886A
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- Prior art keywords
- oil
- oil return
- low
- temperature
- temperature sensor
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Classifications
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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
- 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
- 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
- F04C28/28—Safety arrangements; Monitoring
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/19—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The application provides a kind of low-pressure cavity compressor system and its oil level control method, and the system includes low-pressure cavity compressor；The compression motor spindle or oil groove bottom are provided with the first temperature sensor, and the alert locations of the compressor oil level are provided with second temperature sensor, for detecting oil temperature or suction temperature；The performing module is electrically connected with first temperature sensor and second temperature sensor, for carrying out oil level judgement according to the temperature parameter of first temperature sensor and second temperature sensor detection, whether control system starts oil return measure and ensures oil level, system is run under good operating mode.
Description
Technical field
The application belongs to low-pressure cavity compressor systems technology field, more particularly to a kind of low-pressure cavity compressor system and its oil
Position control method.
Background technology
In refrigerated air-conditioning system running, because system loading changes violent, the improper, start-up course of control or is
System defrosting action etc., can cause excessive refrigerant to return to compressor, cause compressor lubricant oil to dilute, cause lubricating oil viscosity
Decline, cause compressor operation component lubrication bad, so as to cause the phenomenon of compressor failure.
Existing low pressure chamber oil groove compressor, usually not corresponding oil level safeguard measure, also without oil viscosity protection side
Case, in products application, judges whether unit is a large amount of with liquid, with the presence or absence of race oil typically by substantial amounts of experimental verification
Problem.When unit band liquid causes oil viscosity not enough, compressor longtime running is easy to wear, or even liquid hit phenomenon occurs；And machine
Group is run in the case where losing the operating mode of oil, then accelerates the abrasion of compressor, so as to influence using for whole system safe.
The content of the invention
In view of this, the application provides a kind of low-pressure cavity compressor system and its oil level control method.
According to the first aspect of the application there is provided a kind of low-pressure cavity compressor system, the system includes：
Low-pressure cavity compressor；
First temperature sensor, first temperature sensor is arranged at the low-pressure cavity compressor bottom or the bottom of oil groove
Portion, for detecting oil temperature；
Second temperature sensor, the second temperature sensor is arranged at the alert locations of the low-pressure cavity compressor oil level
On, for detecting corresponding temperature parameter；
Performing module, the performing module is electrically connected with first temperature sensor and second temperature sensor, is used for
Oil level judgement, control system are carried out according to the temperature parameter that first temperature sensor and the second temperature sensor are detected
Whether oil return measure is started.
Further, the second temperature sensor is used to detect oil temperature or suction temperature.
Further, the performing module includes：Judging unit, for the oil detected according to first temperature sensor
Warm T1The temperature T detected with the second temperature sensor2Size judge whether system oil level normal；
Execution unit, the execution unit is electrically connected with the judging unit, for the judgement according to the judging unit
Whether output control system starts oil return measure.
Further, described startup oil return measure specifically includes following steps：
Work as T1=T2When, judge that system oil level is normal, do not start oil return measure；
Work as T1＞ T2And continue t1Duration, then judge that system oil level is too low, starts oil return measure；
Start oil return measure t2Duration, when detecting T1=T2 again, continues oil return operation t2Terminate oil return after * 2 durations.
Further, as startup oil return measure t3After duration, detection is when being still unable to reach T1=T2, then stoppage protection,
Oil return time t3＞ oil return times t2。
According to the second aspect of the application there is provided a kind of oil level control method of low-pressure cavity compressor system, including it is following
Step：
Detect oil temperature T1；
Detect oil temperature T2；
Compare the oil temperature T1With the oil temperature T2Size,
Judge whether system oil level is normal according to comparative result；
Determined whether to start oil return measure according to judged result.
Further, it is described to judge whether system oil level is normal according to comparative result, determined whether to open according to judged result
Dynamic oil return measure, comprises the following steps：
As T1=T2, judge that system oil level is normal, do not start oil return measure；
As T1 ＞ T2 and lasting t1Duration, then judge that system oil level is too low, starts oil return measure；
The t1Preset duration is 120s.
Further, oil return measure t is started2After duration, T is detected again1=T2When, continue oil return operation t2* 2 durations
Terminate oil return.
Further, as startup oil return measure t3After duration, detection is still unable to reach T1=T2When, then stoppage protection, institute
State oil return time t3＞ oil return times t2；The t3Preset duration is 300s.
The technical scheme that embodiments herein is provided can include the following benefits：The application passes through in low pressure chamber chamber
The first temperature sensor is set on the bottom of compression motor spindle or oil groove, set on the alert locations of low-pressure cavity compressor oil level
Second temperature sensor, oil temperature or air-breathing temperature that the oil temperature detected using the first temperature sensor is detected with second temperature sensor
The comparison of degree, judges whether oil level is normal, and is made according to whether judged result control system starts oil return measure with ensureing oil level
System is run under good operating mode.
Brief description of the drawings
Fig. 1 is the low-pressure cavity compressor system structure diagram shown in the exemplary embodiment of the application one.
Fig. 2 is the low-pressure cavity compressor structural representation shown in the exemplary embodiment of the application one.
Fig. 3 is the oil level control method schematic diagram shown in the exemplary embodiment of the application one.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the application.
It is the purpose only merely for description specific embodiment in term used in this application, and is not intended to be limiting the application.
" one kind ", " described " and "the" of singulative used in the application and appended claims are also intended to including majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wrapped
It may be combined containing one or more associated any or all of project listed.
Fig. 1 is the low-pressure cavity compressor system structure diagram shown in the exemplary embodiment of the application one；Fig. 2 is the application
Low-pressure cavity compressor structural representation shown in one exemplary embodiment；Fig. 3 is the oil shown in the exemplary embodiment of the application one
Position control method schematic diagram.
Refer to shown in Fig. 1 to Fig. 3, a kind of low-pressure cavity compressor system of the application includes low-pressure cavity compressor 1, performs mould
Expansion valve 4 and four-way valve 5 are connected with block (not shown) described compressor circuit.Compressor 1 is provided with the first temperature sensor 2
And second temperature sensor 3.
Specifically, in one embodiment, first temperature sensor 2 is arranged at the bottom of the low-pressure cavity compressor 1
Or the bottom of oil groove, for detecting oil temperature T1。
Second temperature sensor 3, it is arranged at needed for the alert locations i.e. compressor of the oil level of low-pressure cavity compressor 1
On Safety oil bit line, for detecting oil temperature T2Or suction temperature T2；When oil level is on safety line, now the second temperature is passed
The temperature T that sensor 3 is detected2For oil temperature；As the temperature T that oil level is under safety line, and now the second temperature sensor 3 is detected2
For suction temperature.
The performing module is electrically connected with first temperature sensor 2 and the second temperature sensor 3, for basis
The temperature parameter that first temperature sensor 2 and second temperature sensor 3 are detected carries out oil level judgement, and whether control system opens
Dynamic oil return measure.
The performing module includes judging unit, execution unit, and the judging unit receives first temperature sensor 2
And the temperature data that the second temperature sensor 3 is detected；And the oil temperature T detected according to first temperature sensor 21With institute
State the temperature T of the detection of second temperature sensor 32Size, judge whether system oil level normal.
In the embodiment of the present application, the first described temperature sensor 2 and second temperature sensor 3 are examined in actual temperature
Can there is a deviation Δ t during survey, the maximum rated deviation of the first temperature sensor is Δ t1；Second temperature is passed
The maximum rated deviation of sensor is Δ t2.Preset and work as in the system | T1-T2 |≤Δ t1+ Δs t2 is accordingly to be regarded as described T1
=T2.Such as Δ t1With Δ t2When being ± 1 DEG C；As detection temperature T1With T2Meet | T1-T2| at≤2 DEG C, depending on described T1=
T2.Really, described Δ t1With Δ t2Different number ranges can be selected according to different system designs；The embodiment of the present application
Any restriction is not done in selection to the numerical value.
The execution unit is electrically connected with the judging unit, for controlling system according to the judged result of the judging unit
Whether system starts oil return measure.
Work as T1=T2When, judge that system oil level is normal, do not start oil return measure；
Work as T1＞ T2And continue t1Duration, judges that system oil level is under Safe Levels, starts oil return measure.Start back
Oily measure t2After duration, T is detected again1=T2When, continue oil return operation 2*t2Duration terminates oil return.
As startup oil return measure t3After duration, detection is still unable to reach T1=T2When, then stoppage protection.
In the present embodiment, the t1It is preset as 120s, the t3It is preset as 300s；Certain t1、t3Preset time according to
The difference of unit carries out the corresponding safe initial setting up of operation, and the application is not specifically limited to this.
During the use of compressor assembly, lubricating oil is got in the oil groove of low pressure chamber by eccentric pumping, supply
Rotary part, bearing etc., for lubricating, while also taking away a part of frictional heat, most of lubricating oil can be fallen with gravity,
Motor is touched again, is further overheated, bottom oil groove is finally fallen into, and under the operating mode of specified refrigeration, oil temperature compares suction temperature
High 15~30 DEG C or so, in the case of high pressure ratio, this difference is big, and in the case of low-pressure ratio, this difference is small, can reach
5 DEG C or so.
In the case of the degree of superheat is not controlled smoothly, absorbing gas belt liquid can cause oil overheating degree to be close to 0 DEG C, now
It is not easy to warning.In order to avoid the correct judgement that makes a difference of such case, the stable method of the control degree of superheat has in the application
Body is as follows：Suction superheat threshold value is set, the aperture of electric expansion valve is adjusted according to the degree of superheat.If suction superheat is more than target
Suction superheat, drives big expansion valve；If suction superheat is less than target suction superheat, expansion valve is turned down.When degree of superheat control
In the case of smoothly, during absorbing gas belt liquid, T1Close to T2, alarming effect is just without in fact, absorbing gas belt liquid, illustrates now
Pasta be also that comparison is high, system running environment is relatively preferable.
Expansion valve described in the present embodiment can be that electric expansion valve can also be heating power expansion valve.
In the present embodiment, mistake oily phenomenon occurs during compressor low-speed running, reason is that flow velocity is low, and air-flow carries oil
Ability reduce, cause lubricating oil return less than compressor；Pass through T1And T2Temperature relation come judge whether lose oil, work as judgement
System loses oil and ensures oil return by improving compressor rotary speed.The end condition of oil return is：T1=T2, and from start oil return program
To T1=T2Time be t2, then proceed to run 2*t2Oil return is terminated after time.I.e. after oil level has arrived home, after
Reforwarding row DT Doubling Time is to ensure this abundant oil return, it is to avoid the frequent oil return of system especially multiple on-line system.
Certainly, the unit operating mode that performing module can also be corresponding by recording oil level change, specifically includes compressor
Rotating speed, environment temperature, indoor temperature, pattern, the state of blower fan of operation etc..Unit is sent out by learning low oil level in the present embodiment
Carded sliver part, when being exposed to the same terms next time, using improving countermeasure.Described improving countermeasure is specially：1st, when detecting or sentence
When breaking to absorbing gas belt liquid, reduce the rotating speed of compressor or reduce the aperture of expansion valve；If the 2, system is under the occasion of defrosting switching,
Four-way valve is powered off in advance or power on operation, it is to avoid cause compressor band liquid because four-way valve switching time is unreasonable.
In the present embodiment, data record can be formed after unit study low oil level occurrence condition, in the process of unit operation
In can compare current working and the corresponding operating mode of alarming, if close, just provide corresponding improvement project：Compressor rotary speed is carried
Height, the specific numerical value that improves is 10% of compressor correspondence rotating speed under real-time working condition.
These are only the preferred embodiment of the application, not to limit the application, it is all in spirit herein and
Within principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of the application protection.
Claims (10)
1. a kind of low-pressure cavity compressor system, it is characterised in that the system includes：
Low-pressure cavity compressor；
First temperature sensor, first temperature sensor is arranged at the low-pressure cavity compressor bottom or the bottom of oil groove,
For detecting oil temperature；
Second temperature sensor, the second temperature sensor is arranged on the alert locations of the low-pressure cavity compressor oil level,
For detecting corresponding temperature parameter；
Performing module, the performing module is electrically connected with first temperature sensor and second temperature sensor, for basis
First temperature sensor and the temperature parameter of second temperature sensor detection carry out oil level judgement, and whether control system
Start oil return measure.
2. low-pressure cavity compressor system according to claim 1, it is characterised in that the second temperature sensor is used to examine
Survey oil temperature or suction temperature.
3. low-pressure cavity compressor system according to claim 2, it is characterised in that the performing module includes：Judge single
Member, for the oil temperature T detected according to first temperature sensor1The temperature T detected with the second temperature sensor2It is big
It is small to judge whether system oil level is normal；
Execution unit, the execution unit is electrically connected with the judging unit, for the judged result according to the judging unit
Whether control system starts oil return measure.
4. low-pressure cavity compressor system according to claim 3, it is characterised in that described startup oil return measure is specifically wrapped
Include following steps：
Work as T1=T2When, judge that system oil level is normal, do not start oil return measure；
Work as T1＞ T2And continue t1Duration, then judge that system oil level is too low, starts oil return measure；
Start oil return measure t2Duration, when detecting T1=T2 again, continues oil return operation t2Terminate oil return after * 2 durations.
5. low-pressure cavity compressor system according to claim 4, it is characterised in that as startup oil return measure t3After duration, inspection
Survey is when being still unable to reach T1=T2, then stoppage protection, oil return time t3＞ oil return times t2。
6. the oil level control method of the low-pressure cavity compressor system according to any one of claim 1 to 5, it is characterised in that
Comprise the following steps：
Detect oil temperature T1；
Detect oil temperature T2；
Compare the oil temperature T1With the oil temperature T2Size,
Judge whether system oil level is normal according to comparative result；
Determined whether to start oil return measure according to judged result.
7. the oil level control method of low-pressure cavity compressor system according to claim 6, it is characterised in that it is described according to than
Relatively result judges whether system oil level is normal, is determined whether to start oil return measure according to judged result, comprised the following steps：
As T1=T2, judge that system oil level is normal, do not start oil return measure；
As T1 ＞ T2 and lasting t1Duration, then judge that system oil level is too low, starts oil return measure；
The t1Preset duration is 120s.
8. the oil level control method of low-pressure cavity compressor system according to claim 7, it is characterised in that start oil return and arrange
Apply t2After duration, T is detected again1=T2When, continue oil return operation t2* 2 durations terminate oil return.
9. the oil level control method of low-pressure cavity compressor system according to claim 8, it is characterised in that when startup oil return
Measure t3After duration, detection is still unable to reach T1=T2When, then stoppage protection, oil return time t3＞ oil return times t2；Institute
State t3Preset duration is 300s.
10. the oil level control method of the low-pressure cavity compressor system according to claim any one of 7-9, it is characterised in that
It is described to start the rotating speed that oil return measure specifically refers to improve compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457386.2A CN107288886B (en) | 2017-06-16 | 2017-06-16 | Oil level control method for low-pressure cavity compressor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710457386.2A CN107288886B (en) | 2017-06-16 | 2017-06-16 | Oil level control method for low-pressure cavity compressor system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107288886A true CN107288886A (en) | 2017-10-24 |
| CN107288886B CN107288886B (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710457386.2A Active CN107288886B (en) | 2017-06-16 | 2017-06-16 | Oil level control method for low-pressure cavity compressor system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000388A (en) * | 2018-06-15 | 2018-12-14 | 重庆美的通用制冷设备有限公司 | Water cooler and its oil pump control method, device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003097443A (en) * | 2001-09-25 | 2003-04-03 | Mitsubishi Heavy Ind Ltd | Compressor and refrigeration unit |
| CN1696506A (en) * | 2004-05-13 | 2005-11-16 | 松下电器产业株式会社 | Hermetic compressor and refrigeration unit |
| KR20080065191A (en) * | 2007-01-08 | 2008-07-11 | 주식회사 대우일렉트로닉스 | Apparatus and method for recovering oil of compressor |
| JP2009250223A (en) * | 2008-04-11 | 2009-10-29 | Panasonic Corp | Hermetic compressor and refrigerating unit |
| CN205876661U (en) * | 2016-07-21 | 2017-01-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner |
-
2017
- 2017-06-16 CN CN201710457386.2A patent/CN107288886B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003097443A (en) * | 2001-09-25 | 2003-04-03 | Mitsubishi Heavy Ind Ltd | Compressor and refrigeration unit |
| CN1696506A (en) * | 2004-05-13 | 2005-11-16 | 松下电器产业株式会社 | Hermetic compressor and refrigeration unit |
| KR20080065191A (en) * | 2007-01-08 | 2008-07-11 | 주식회사 대우일렉트로닉스 | Apparatus and method for recovering oil of compressor |
| JP2009250223A (en) * | 2008-04-11 | 2009-10-29 | Panasonic Corp | Hermetic compressor and refrigerating unit |
| CN205876661U (en) * | 2016-07-21 | 2017-01-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000388A (en) * | 2018-06-15 | 2018-12-14 | 重庆美的通用制冷设备有限公司 | Water cooler and its oil pump control method, device |
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| Publication number | Publication date |
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| CN107288886B (en) | 2020-02-11 |
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