CN103673398A - Compressor oil return system and oil return state detection method of compressor - Google Patents
Compressor oil return system and oil return state detection method of compressor Download PDFInfo
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- CN103673398A CN103673398A CN201210331060.2A CN201210331060A CN103673398A CN 103673398 A CN103673398 A CN 103673398A CN 201210331060 A CN201210331060 A CN 201210331060A CN 103673398 A CN103673398 A CN 103673398A
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- 239000003921 oil Substances 0.000 title claims abstract description 174
- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 239000010725 compressor oil Substances 0.000 title abstract description 9
- 230000008676 import Effects 0.000 claims abstract description 12
- 235000003642 hunger Nutrition 0.000 claims description 33
- 230000037351 starvation Effects 0.000 claims description 33
- 239000010687 lubricating oil Substances 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 4
- 238000010977 unit operation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The invention aims to provide a compressor oil return system and a compressor oil return state detection method, wherein the compressor oil return system comprises: a compressor having an air suction port and an air discharge port; the oil-gas separator is provided with an inlet, an outlet and an oil return port; the first end of the oil return pipeline is connected with an oil return port of the oil-gas separator; the air return pipeline is communicated with the second end of the oil return pipeline and then is connected with an air suction port of the compressor; the exhaust pipe way is connected between the import of oil and gas separator and the gas vent of compressor, and compressor oil return system still includes: the first throttling part is arranged on the oil return pipeline; the first temperature sensing component is arranged on the oil return pipeline, positioned between the first throttling component and the second end of the oil return pipeline and used for detecting a first temperature of the oil return pipeline; and the second temperature sensing device is used for acquiring the oil return temperature during oil shortage. The invention provides a simple and reliable compressor oil return system with low cost and an oil return state detection method of a compressor.
Description
Technical field
The present invention relates to Compressor Technology field, in particular to the oil return condition detection method of a kind of compressor return oil system and compressor.
Background technology
In the air-conditioning unit of prior art, compressor is constantly discharged to gas mixture in high-pressure system, if normally oil return of compressor assembly, compressor can very fast oil starvation causes compressor lubrication bad and lost efficacy.In prior art, general use capillary directly from system high pressure gs-oil separator or oil container, to get back to compressor air suction mouth to carry out repairing, because this kind of circuit cannot detect oil return state, so generally detect oil level at compressor oil sump installation float switch or oil level switch, but cost cost is too high.
Summary of the invention
The present invention aims to provide a kind of simple and reliable, compressor return oil system that cost is low and the oil return condition detection method of compressor.
To achieve these goals, according to an aspect of the present invention, provide a kind of compressor return oil system, having comprised: compressor, has had air entry and exhaust outlet; Gs-oil separator, has import, outlet and oil return opening; Return line, the first end of return line is connected with the oil return opening of gs-oil separator; Return line, with the air entry of compressor is connected after being communicated with the second end of return line; Gas exhaust piping, is connected between the import of gs-oil separator and the exhaust outlet of compressor, and compressor return oil system also comprises: first throttle parts, are arranged on return line; The first temperature sensing part, is arranged on return line and between the second end of first throttle parts and return line, for detection of the first temperature that goes out return line; The second temperature sensing device, the returning-oil temperature when obtaining oil starvation.
Further, the second temperature sensing device comprises: auxiliary piping, and the first end of auxiliary piping is communicated with gas exhaust piping, the second end is communicated with return line; Second section stream unit, is arranged on auxiliary piping; The second temperature sensing part, is arranged on auxiliary piping and between the second end of second section stream unit and auxiliary piping, the returning-oil temperature when obtaining oil starvation.
Further, the second temperature sensing device comprises: the 3rd temperature sensing part, be arranged on gas exhaust piping and between the exhaust outlet of compressor and the import of gs-oil separator, and the 3rd temperature sensing part is for detection of the delivery temperature of gas exhaust piping; High pressure detection part, is arranged on gas exhaust piping, and high pressure detection part is for detection of the condensing pressure of compressor; Low pressure detection part, is arranged in return line, and low pressure detection part is for detection of the evaporating pressure of compressor.
Further, also comprise the first controller, the first controller is electrically connected to the first temperature sensing part and the second temperature sensing part respectively.
Further, first throttle parts and second section stream unit are capillary.
According to a further aspect in the invention, provide a kind of oil return condition detection method of compressor, comprised the following steps: the returning-oil temperature when obtaining the first temperature sensing part and detecting the first temperature obtain and the second temperature sensing device and obtain the oil starvation drawing; Whether the difference between the returning-oil temperature while judging the first temperature and oil starvation falls into predetermined value scope; Whether the difference between the returning-oil temperature during according to the first temperature and oil starvation falls into the judged result of predetermined value scope, show that whether the oil return state of compressor is normal.
Further, whether the difference between the returning-oil temperature during according to the first temperature and oil starvation falls into the judged result of predetermined value scope, whether the oil return state that draws compressor normally comprises: when the first difference falls into preset range, judge that the oil return state in gs-oil separator with lubricating oil and compressor is for normal.
Further; whether the difference between the returning-oil temperature during according to the first temperature and oil starvation falls into the judged result of predetermined value scope; whether the oil return state that draws compressor normally also comprises: when the first difference is less than the minimum of a value of predetermined value scope, judge that compressor is in oil starvation state.
Further, when judging compressor in oil starvation state, alarm sends early warning signal.
After returning-oil temperature when further, obtaining the first temperature sensing part and detect the first temperature obtain and the second temperature sensing device and obtain the oil starvation drawing, also comprise: the environment temperature of obtaining unit operation; By environment temperature, obtain and draw ambient temperature range; Judge whether the first temperature falls into ambient temperature range; According to the first temperature, whether fall into the judged result of ambient temperature range, show whether the first temperature sensing part comes off or return line obstruction from return line.
Apply technical scheme of the present invention, compressor return oil system comprises: compressor, has air entry and exhaust outlet; Gs-oil separator, has import, outlet and oil return opening; Return line, the first end of return line is connected with the oil return opening of gs-oil separator; Return line, with the air entry of compressor is connected after being communicated with the second end of return line; Gas exhaust piping, is connected between the import of gs-oil separator and the exhaust outlet of compressor, and compressor return oil system also comprises: first throttle parts, are arranged on return line; The first temperature sensing part, is arranged on return line and between the second end of first throttle parts and return line, for detection of the first temperature that goes out return line; The second temperature sensing device, the returning-oil temperature when obtaining oil starvation.By the first temperature sensing part in system and the second temperature sensing part, measure after the relevant parameter in compressor assembly, thereby parameter is carried out mutually to the relatively oil return state of judgement compressor, owing to installing in compressor assembly, some temperature sensing devices that can measure temperature are set with respect to parts such as oil level switch of the prior art, to compare its cost low, and this compressor return oil system is simple and reliable.
Accompanying drawing explanation
The Figure of description that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the first embodiment of compressor return oil system of the present invention;
Fig. 2 shows the structural representation of the second embodiment of compressor return oil system of the present invention;
Fig. 3 shows the compressor oil return state judgement schematic diagram of the compressor return oil system of Fig. 1;
Fig. 4 shows the schematic flow sheet of embodiment of the oil return condition detection method of compressor of the present invention.
The specific embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
As shown in Figure 1, the first embodiment of compressor return oil system provided by the invention, compressor return oil system comprises compressor 10, gs-oil separator 20, return line 30, return line 40, gas exhaust piping 50, first throttle parts 31, the first temperature sensing part 32 and the second temperature sensing device, compressor 10 has air entry and exhaust outlet, gs-oil separator 20 has import, outlet and oil return opening, the first end of return line 30 is connected with the oil return opening of gs-oil separator 20, return line 40 is connected with the air entry of compressor 10 after being communicated with the second end of return line 30, gas exhaust piping 50 is connected between the import of gs-oil separator 20 and the exhaust outlet of compressor 10, first throttle parts 31 are arranged on return line 30, the first temperature sensing part 32 is arranged on return line 30 and between first throttle parts 31 and the second end of return line 30, for detection of the first temperature that goes out return line 30, returning-oil temperature when the second temperature sensing device is used for obtaining oil starvation.
Wherein, the second temperature sensing device comprises auxiliary piping 60, second section stream unit 61 and the second temperature sensing part 62, the first end of auxiliary piping 60 is communicated with gas exhaust piping 50, the second end is communicated with return line 40, second section stream unit 61 is arranged on auxiliary piping 60, the second temperature sensing part 62 is arranged on auxiliary piping 60 and between second section stream unit 61 and the second end of auxiliary piping 60, the returning-oil temperature of the second temperature sensing part 62 when obtaining oil starvation.
The present embodiment further preferably, also comprises the first controller, and the first controller is electrically connected to the first temperature sensing part 32 and the second temperature sensing part 62 respectively, and first throttle parts 31 and second section stream unit 61 are capillary.
By the first temperature sensing part in system and the second temperature sensing part, measure after the relevant parameter in compressor assembly, thereby parameter is carried out mutually to the relatively oil return state of judgement compressor, owing to installing in compressor assembly, some temperature sensing devices that can measure temperature are set with respect to parts such as oil level switch of the prior art, to compare its cost low, and this compressor return oil system is simple and reliable.
The operation principle of the first embodiment of compressor return oil system is as follows: compressor oil return state judgement schematic diagram is as shown in Figure 3 pressure-enthalpy chart, wherein, oil content state point is C place in Fig. 3, if gs-oil separator has oil and the compressor can oil return, the oil-out of gs-oil separator flows out lubricating oil, the temperature detecting is like this higher, and its temperature spot is the F point in Fig. 3; If the oil level of gs-oil separator is not enough, return line circulation steam state refrigerant, at refrigerant, after first throttle parts adiabatic expansion, the temperature detecting is like this lower, and its temperature spot is the D point in Fig. 3; When if not circulating appears in the return line of compressor, pipeline blockage for example, return line and environment temperature are approaching, therefore the first temperature detecting is close to environment temperature.
The present invention also provides the second embodiment of compressor return oil system, specifically referring to Fig. 2, compressor return oil system comprises compressor 10, gs-oil separator 20, return line 30, return line 40, gas exhaust piping 50, first throttle parts 31, the first temperature sensing part 32 and the second temperature sensing device, the connection of above-mentioned parts and position relationship are all identical with connection and the position relationship of the first embodiment, the difference of the compressor return oil system of the present embodiment and the first embodiment is, the second temperature sensing device comprises the 3rd temperature sensing part 51, high pressure detection part 52 and low pressure detection part 41, the 3rd temperature sensing part 51 is arranged on gas exhaust piping 50 and between the exhaust outlet of compressor 10 and the import of gs-oil separator 20, the 3rd temperature sensing part 51 is for detection of the delivery temperature of gas exhaust piping 50, low pressure detection part 41 is arranged in return line 40, low pressure detection part is for detection of the evaporating pressure of compressor, high pressure detection part 52 is arranged on gas exhaust piping 50, high pressure detection part 52 is for detection of the condensing pressure of compressor.
The embodiment of the present invention also provides a kind of oil return condition detection method of compressor, the oil return state of any compressor return oil system that the oil return condition detection method of this compressor can provide for detection of the above embodiment of the present invention, Fig. 4 is according to the schematic diagram of the oil return condition detection method of the compressor of the embodiment of the present invention, and the oil return condition detection method of compressor comprises the following steps:
Step S 1: the returning-oil temperature when obtaining the first temperature sensing part and detecting the first temperature obtain and the second temperature sensing device and obtain the oil starvation drawing;
Step S3: whether the difference between the returning-oil temperature while judging the first temperature and oil starvation falls into predetermined value scope;
Step S5: whether the difference between the returning-oil temperature during according to the first temperature and oil starvation falls into the judged result of predetermined value scope, show that whether the oil return state of compressor is normal.
Wherein, above-mentioned steps S5 specifically can comprise:
When the first difference falls into preset range, judge that the oil return state in gs-oil separator with lubricating oil and compressor is for normal;
When the first difference is less than the minimum of a value of predetermined value scope, judge that compressor is in oil starvation state; When judging compressor in oil starvation state, alarm sends early warning signal.When alarm sends early warning signal, compressor is shut down operation simultaneously, and equipment person need check that whether lubricating oil is enough, whether oil circuit stops up, and after confirmation no problem, power-off powers on and can remove fault, start again.
Predetermined value scope in the present embodiment for through great many of experiments record for judging the predetermined value scope of contrast, operated by rotary motion is between 3 ℃-10 ℃, wherein predetermined value is most preferably 5 ℃.Wherein, it should be noted that, the returning-oil temperature obtaining while drawing oil starvation by the second temperature sensing device comprises that in following three kinds of modes, any obtains, and is specially:
1, according to the temperature that in the first embodiment of compressor return oil system, the second temperature sensing part measures, the returning-oil temperature while calculating oil starvation from the relation table of measurement temperature-returning-oil temperature;
2,, according to the delivery temperature recording, condensing pressure and evaporating pressure in the second embodiment of compressor return oil system, by predetermined formula, calculate or returning-oil temperature when pressure-enthalpy chart checks in oil starvation;
3, the returning-oil temperature in the time of can calculating oil starvation according to the delivery temperature recording in the second embodiment of compressor return oil system by predetermined formula.
The present embodiment is further preferably, further comprising the steps of after step S1:
Obtain the environment temperature at the unit place of air-conditioning;
By environment temperature, obtain and draw ambient temperature range;
Judge whether the first temperature falls into ambient temperature range;
According to the first temperature, whether fall into the judged result of ambient temperature range, show in compressor return oil system, whether first throttle parts stop up or show that the first temperature sensing part comes off from return line.When judgement place first throttle parts stop up, warning device sends signal, and equipment person need clear up first throttle parts or whether maintenance the first temperature sensing part comes off, and confirms again to start shooting after no problem.Above-mentioned environment temperature is to record by being arranged on the conventional environment temperature-sensitive bag arranging in compressor return oil system.
Preferably, above-mentioned by environment temperature, obtain after the step that draws ambient temperature range further comprising the steps of:
Obtain the delivery temperature of gas exhaust piping;
Judge whether delivery temperature falls into ambient temperature range;
According to delivery temperature, whether fall into the judged result of ambient temperature range, show whether the 3rd temperature sensing part comes off.When judging the 3rd temperature sensing part and come off, warning device sends alarm signal, after equipment personnel need check and overhaul, confirms start again after no problem.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a compressor return oil system, comprising:
Compressor (10), has air entry and exhaust outlet;
Gs-oil separator (20), has import, outlet and oil return opening;
Return line (30), the first end of described return line (30) is connected with the oil return opening of described gs-oil separator (20);
Return line (40), with the air entry of described compressor (10) is connected after being communicated with the second end of described return line (30);
Gas exhaust piping (50), is connected between the import of described gs-oil separator (20) and the exhaust outlet of described compressor (10),
It is characterized in that, described compressor return oil system also comprises:
First throttle parts (31), are arranged on described return line (30);
The first temperature sensing part (32), being arranged on described return line (30) goes up and is positioned between described first throttle parts (31) and the second end of described return line (30), for detection of the first temperature that goes out described return line (30);
The second temperature sensing device, the returning-oil temperature when obtaining oil starvation.
2. compressor return oil system according to claim 1, it is characterized in that, described the second temperature sensing device comprises: auxiliary piping (60), and the first end of described auxiliary piping (60) is communicated with described gas exhaust piping (50), the second end is communicated with described return line (40);
Second section stream unit (61), is arranged on described auxiliary piping (60);
The second temperature sensing part (62), is arranged on described auxiliary piping (60) and goes up and be positioned between described second section stream unit (61) and the second end of described auxiliary piping (60), the returning-oil temperature when obtaining oil starvation.
3. compressor return oil system according to claim 1, is characterized in that, described the second temperature sensing device comprises:
The 3rd temperature sensing part (51), be arranged on described gas exhaust piping (50) and go up and be positioned between the exhaust outlet of described compressor (10) and the import of described gs-oil separator (20), described the 3rd temperature sensing part (51) is for detection of the delivery temperature of described gas exhaust piping (50);
High pressure detection part (52), is arranged on described gas exhaust piping (50) upper, and described high pressure detection part (52) is for detection of the condensing pressure of compressor;
Low pressure detection part (41), is arranged on described return line (40) upper, and described low pressure detection part (41) is for detection of the evaporating pressure of compressor.
4. compressor return oil system according to claim 2, is characterized in that, also comprises the first controller, and described the first controller is electrically connected to described the first temperature sensing part (32) and described the second temperature sensing part (62) respectively.
5. compressor return oil system according to claim 2, is characterized in that, described first throttle parts (31) and described second section stream unit (61) are capillary.
6. an oil return condition detection method for compressor, is characterized in that, comprises the following steps:
Returning-oil temperature when obtaining the first temperature sensing part and detecting the first temperature obtain and the second temperature sensing device and obtain the oil starvation drawing;
Whether the difference between the returning-oil temperature while judging described the first temperature and oil starvation falls into predetermined value scope;
Whether the difference between the returning-oil temperature during according to described the first temperature and oil starvation falls into the judged result of predetermined value scope, show that whether the oil return state of compressor is normal.
7. oil return condition detection method according to claim 6, is characterized in that, whether the difference between the returning-oil temperature during according to described the first temperature and oil starvation falls into the judged result of predetermined value scope, show whether the oil return state of compressor normally comprises:
When the first difference falls into described preset range, judge that the oil return state in gs-oil separator with lubricating oil and compressor is for normal.
8. oil return condition detection method according to claim 7; it is characterized in that; whether the difference between the returning-oil temperature during according to described the first temperature and oil starvation falls into the judged result of predetermined value scope, show whether the oil return state of compressor normally also comprises:
When the first difference is less than the minimum of a value of described predetermined value scope, judge that compressor is in oil starvation state.
9. oil return condition detection method according to claim 8, is characterized in that, when judging compressor in oil starvation state, alarm sends early warning signal.
10. oil return condition detection method according to claim 6, is characterized in that, after the returning-oil temperature when obtaining the first temperature sensing part and detecting the first temperature obtain and the second temperature sensing device and obtain the oil starvation drawing, also comprises:
Obtain the environment temperature of unit operation;
By environment temperature, obtain and draw ambient temperature range;
Judge whether described the first temperature falls into ambient temperature range;
According to described the first temperature, whether fall into the judged result of ambient temperature range, show whether the first temperature sensing part comes off or return line obstruction from return line.
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| CN201210331060.2A CN103673398B (en) | 2012-09-07 | 2012-09-07 | Compressor oil return system and oil return state detection method of compressor |
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| CN201210331060.2A CN103673398B (en) | 2012-09-07 | 2012-09-07 | Compressor oil return system and oil return state detection method of compressor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104748782A (en) * | 2015-04-09 | 2015-07-01 | 宁波奥克斯电气有限公司 | Judgment method for oil shortage of multi-connected unit |
| CN104949407A (en) * | 2015-06-12 | 2015-09-30 | 珠海格力电器股份有限公司 | Oil separator assembly, refrigeration system and control method of refrigeration system |
| CN105156317A (en) * | 2015-10-15 | 2015-12-16 | 珠海格力电器股份有限公司 | Compressor oil level detection device, air conditioning system and compressor oil level detection method |
| CN105444366A (en) * | 2015-12-31 | 2016-03-30 | 广东美的制冷设备有限公司 | Oil blockage detecting method and detecting device of air conditioning system and air conditioner |
| CN106338160A (en) * | 2015-07-08 | 2017-01-18 | 三菱电机株式会社 | Air-Conditioning Device |
| CN106440436A (en) * | 2016-11-17 | 2017-02-22 | 珠海格力电器股份有限公司 | Air conditioning system and compressor oil return structure thereof |
| CN109236626A (en) * | 2018-08-13 | 2019-01-18 | 珠海格力电器股份有限公司 | System and method for detecting dirty blockage of oil return pipeline of compressor and electric appliance product |
| CN110131840A (en) * | 2019-05-15 | 2019-08-16 | 宁波奥克斯电气股份有限公司 | A kind of convertible frequency air-conditioner method for controlling oil return and convertible frequency air-conditioner |
| CN113864993A (en) * | 2021-11-04 | 2021-12-31 | 宁波奥克斯电气股份有限公司 | A kind of control method of auxiliary oil return device of multi-line air conditioning system |
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| CN109236626A (en) * | 2018-08-13 | 2019-01-18 | 珠海格力电器股份有限公司 | System and method for detecting dirty blockage of oil return pipeline of compressor and electric appliance product |
| CN109236626B (en) * | 2018-08-13 | 2020-03-24 | 珠海格力电器股份有限公司 | System and method for detecting dirty blockage of oil return pipeline of compressor and electric appliance product |
| CN110131840A (en) * | 2019-05-15 | 2019-08-16 | 宁波奥克斯电气股份有限公司 | A kind of convertible frequency air-conditioner method for controlling oil return and convertible frequency air-conditioner |
| CN110131840B (en) * | 2019-05-15 | 2021-05-14 | 宁波奥克斯电气股份有限公司 | A frequency conversion air conditioner oil return control method and frequency conversion air conditioner |
| CN113864993A (en) * | 2021-11-04 | 2021-12-31 | 宁波奥克斯电气股份有限公司 | A kind of control method of auxiliary oil return device of multi-line air conditioning system |
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| CN103673398B (en) | 2015-12-16 |
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