CN1296694C - Method for real-time measuring refrigerant quality of compressor oil by level and sampling method - Google Patents
Method for real-time measuring refrigerant quality of compressor oil by level and sampling method Download PDFInfo
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- CN1296694C CN1296694C CNB2005100234490A CN200510023449A CN1296694C CN 1296694 C CN1296694 C CN 1296694C CN B2005100234490 A CNB2005100234490 A CN B2005100234490A CN 200510023449 A CN200510023449 A CN 200510023449A CN 1296694 C CN1296694 C CN 1296694C
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Abstract
The present invention relates to a method for measuring the refrigerant weight in compressor oil in real time by a liquid level method and a sampling method, which belongs to the technical field of refrigeration and air conditioning. The method comprises the following steps: a liquid level L of the mixture in a compressor is measured, and the volume V of the mixture of the oil and the refrigerant is determined; the oil density rho oil and the refrigerant density rho ref of the temperature T and the pressure P of the mixture are measured; the refrigerant concentration omega ref and the oil concentration omega oil of the mixture of the oil and the refrigerant are determined by sampling; the density rho of the mixture of the oil and the refrigerant is obtained by calculation according to a formula of rho=1/*ref/rho ref+*oil/rho oil; the weight M of the mixture of the oil and the refrigerant in the compressor is obtained by the calculation according to a formula of M=rho*V; the quality M ref of the refrigerant in the mixture of the oil and the refrigerant is obtained by the calculation according to a formula of M<ref>=M*omega ref. The present invention has high measurement accuracy, the refrigerant and the oil with the same weight as the sampling are filled in a system in real time, and the constant work performance of the compressor and the system is guaranteed.
Description
Technical field:
The present invention relates to a kind of method of measuring refrigerant quality in the compressor oil, particularly a kind ofly measure the method for refrigerant quality in the compressor oil in real time, belong to the Refrigeration ﹠ Air-Conditioning technical field with liquid level method and sampling method.
Background technology:
For vapor compression refrigeration system, inevitably dissolve certain cold-producing medium in the compressor oil, what of the cold-producing medium that dissolves in the oil all produce in various degree influence for the performance of system and compressor, determine that refrigerant quality that compressor dissolves in the oil under different operating modes is extremely important to the characteristic of the design of instructing air-condition heat exchanger and evaluation system.
Usually adopt solubility method to determine the quality of cold-producing medium in the compressor oil at present.Solubility method is to determine the solubleness of cold-producing medium in the potpourri according to existing oily refrigerant mixture cold-producing medium saturated solubility curve in oil under different temperatures and different pressures, and then utilizes in the compressor solubleness that the quality of oil multiply by cold-producing medium just can obtain the quality of the cold-producing medium in the compressor oil.Harms is at document " AccurateCharge Inventory Modeling for Unitary Air Conditioners " [Harms, Todd M. in the existing technology; Groll, Eckhard A.; Braun, James E.Source:HVAC and R Research, v9, n1, January, 2003, p55-78] in utilize solubility method to measure the quality of cold-producing medium in the compressor oil.Because the data that the temperature and pressure of solubleness and the cold-producing medium oil mixture of cold-producing medium in oil concerns have only the data of state of saturation, and the scope of temperature and pressure is restricted.Obtain enough data if desired, need a large amount of experiments.And the quality of the oil that adopts not is an oil quality actual in the compressor.Under different operating modes, the oil in the compressor is brought in the refrigeration system loop inevitably, causes the minimizing of oil quality in the compressor, and this situation is more obvious under the start operating mode.This method is not considered the minimizing that is brought to the oil quality in the refrigeration system.The oil quality that it adopts is the oil quality that compressor initially pours.
Summary of the invention:
For deficiency and the defective that overcomes prior art, the present invention proposes the quality of measuring the cold-producing medium in the compressor oil with the method for sampling method and the combination of liquid level method in real time, and inject the oil and the cold-producing medium of equal in quality respectively to compressor and system by oil and cold-producing medium injection device, the performance of maintenance compressor and system is constant.
The measuring system that measuring method of the present invention is used comprises three parts: measuring device part, oil injection apparatus part and cold-producing medium injection device part.
Measuring device part comprises liquid level gauge, stop valve, vacuum pump, day gentle sampling bucket.
Oil injection apparatus partly comprises balance, high pressure oil tank, high-pressure hose, stop valve, variable valve and retaining valve.
The cold-producing medium injection device partly comprises balance, high-pressure refrigerant jar, high-pressure hose, stop valve, variable valve and retaining valve.
Measuring method of the present invention may further comprise the steps:
1) determines oil and the liquid level L of refrigerant mixture and the relation curve between the volume V in the compressor;
2) according to the relation curve between liquid level and the volume, by measuring oil and the liquid level L acquisition oil of refrigerant mixture and the volume V of refrigerant mixture in the compressor;
3) record the oil and the temperature T and the pressure P of refrigerant mixture by temperature sensor and pressure transducer;
4) obtain oily density p according to oil and the rerum natura of cold-producing medium and the temperature T of being surveyed and pressure P
OilDensity p with cold-producing medium
Ref
5) concentration of cold-producing medium in oil and the refrigerant mixture is determined in sampling
Concentration with oil
6) density of calculating oil and refrigerant mixture
7) mass M=ρ * V of oil and refrigerant mixture in the calculating compressor;
8) quality of cold-producing medium in calculating oil and the refrigerant mixture
9) in system, injects cold-producing medium with the equal in quality of sampling by the cold-producing medium injection device;
10) by oil injection apparatus in compressor, inject with the sampling equal in quality oil;
The inventive method is owing to adopt the liquid level method and sampling method, can determine the concentration of cold-producing medium in the actual content of the oil in the compressor and the oil more exactly, so more accurate to the measurement of the refrigerant quality that contains in the compressor oil.And can replenish oil and cold-producing medium that sampling is extracted in real time, not influence the serviceability of compressor and system.
Description of drawings:
The measuring system structural representation that Fig. 1 uses for measuring method of the present invention.Among the figure, 1 is compressor, and 2 is gas-liquid separator, 3 is liquid level gauge, and 4 is vacuum pump, and 5 is the A1 stop valve, 6 is the B1 stop valve, and 7 is the C1 stop valve, and 8 is the A2 stop valve, 9 is the B2 stop valve, and 10 is the C2 stop valve, and 11 is the A3 stop valve, 12 is the B3 stop valve, and 13 is the C3 stop valve, and 14 are the sampling bucket, 15 is the A retaining valve, and 16 is the B retaining valve, and 17 is the A variable valve, 18 is the B variable valve, 19 is the high pressure oil tank, and 20 is refrigerant tank, and 21 is the A electronic scale, 22 is the B electronic scale, 23 is kapillary, and 24 is pressure transducer, and 25 is temperature sensor.
Specific implementation method:
Be further described below in conjunction with the concrete enforcement of accompanying drawing measuring method of the present invention.
As shown in Figure 1, the measuring system of measuring method use of the present invention comprises three parts.
Measuring device part is by liquid level gauge 3, A1 stop valve 5, and B1 stop valve 6, C1 stop valve 7, vacuum pump 4, kapillary 23 and sampling bucket 14 constitute.
Oil injection apparatus part is by A2 stop valve 8, B2 stop valve 9, and C2 stop valve 10, A retaining valve 15, A variable valve 17, high pressure oil tank 19, A electronic scale 21 and corresponding flexible pipe and pipeline constitute.
Cold-producing medium injection device part is by A3 stop valve 11, B3 stop valve 12, and C3 stop valve 13, B retaining valve 16, B variable valve 18, refrigerant tank 20, B electronic scale 22 and corresponding flexible pipe and pipeline constitute.
The concrete enforcement of measuring method of the present invention comprises the steps:
1) utilizes one to do the liquid level L and the volume V experiment of compressor, obtain the relation curve of liquid level and volume with the compressor of tested compressor 1 same structure and identical oil;
2) record the oil and the liquid level L of refrigerant mixture by liquid level gauge 3, utilize the relation curve of liquid level and volume to obtain the volume V of oily and refrigerant mixture in the compressor 1 then;
3) record the pressure P and the temperature T of oily refrigerant mixture by pressure transducer 24 and temperature sensor 25;
4) obtain oily density p according to oil and the rerum natura of cold-producing medium and the temperature T of being surveyed and pressure P
OilDensity p with cold-producing medium
Ref
5) determine concentration oily in oil and the refrigerant mixture by sampling
Concentration with cold-producing medium
Open A1 stop valve 5 and B1 stop valve 6, close C1 stop valve 7, utilize 4 pairs of sampling circuits of vacuum pump to vacuumize, close A1 stop valve 5 after exhausting vacuum, B1 stop valve 6 unloads down-sampling bucket 14 and utilizes electronic scale to weigh to be designated as W
1Again load onto sampling bucket 14, open A1 stop valve 5, B1 stop valve 6 vacuumizes once more, closes A1 stop valve 5 after vacuumizing end.Open the C1 stop valve 7 that is connected with compressor 1, utilize oil and refrigerant mixture in 14 pairs of compressors 1 of sampling bucket to sample, close A1 stop valve 5 after sampling finishes, B1 stop valve 6 unloads down-sampling bucket 14, utilizes electronic scale to weigh and is designated as W
2Slowly open the B1 stop valve 6 on the sampling bucket 14 then, discharge the cold-producing medium in the sampling bucket 14, when the reading of electronic scale no longer descended, the sampling bucket of remaining oil weighed was designated as W
3, the quality of the oil that sampling obtains is (W
3-W
1), the quality of the cold-producing medium that sampling obtains is (W
2-W
3).The gross mass of potpourri is (W
2-W
1).The concentration of cold-producing medium is in the potpourri
The concentration of oil is in the potpourri
6) according to the concentration of cold-producing medium in oil and the refrigerant mixture
Concentration with oil
And the density p of oil
OilDensity p with cold-producing medium
Ref, pass through formula
Calculate fuel-displaced and density p refrigerant mixture
7) pass through the mass M that formula M=ρ * V obtains oil and refrigerant mixture;
8) pass through formula
Obtain the mass M of cold-producing medium in oil and the refrigerant mixture
Ref
9) in refrigeration system, inject cold-producing medium: refrigerant tank 20 is placed on the B electronic scale 22., open A3 stop valve 11, B3 stop valve 12 and C3 stop valve 13.Slowly open B variable valve 18 then, to the inlet injection cold-producing medium of gas-liquid separator 2, the quality (W of the cold-producing medium of when the quality of injecting cold-producing medium and sampling, obtaining
2-W
3) when equating, close B variable valve 18, A3 stop valve 11, B3 stop valve 12 and C3 stop valve 13.
10) in compressor 1, inject oil: high pressure oil tank 19 is placed on the A electronic scale 21.Open A2 stop valve 8, B2 stop valve 9 and C2 stop valve 10.Slowly open A variable valve 17 then, inject oil, the quality (W of the oil of when the quality of injecting oil and sampling, obtaining to compressor 1
3-W
1) when equating, close A variable valve 17, A2 stop valve 8, B2 stop valve 9 and C2 stop valve 10.
Determine in the compressor concentration relationship of oil and refrigerant mixture by sampling method.Liquid level method and sampling method are in conjunction with obtaining oil and the gross mass of refrigerant mixture and the refrigerant quality in the compressor oil.The injection device of cold-producing medium and oil can replenish oil and the cold-producing medium that sampling is extracted again, does not influence the serviceability of compressor and system.
Claims (3)
1. measure the method for refrigerant quality in the compressor oil in real time with liquid level method and sampling method for one kind, it is characterized in that this method comprises the steps:
1) determines oil and the liquid level L of refrigerant mixture and the relation curve between the volume V in the compressor;
2), obtain the volume V of potpourri by the liquid level L of oil and refrigerant mixture in the measurement compressor according to the relation curve between liquid level and the volume:
3) record the oil and the temperature T and the pressure P of refrigerant mixture by temperature sensor and pressure transducer;
4) obtain oily density p according to oil and the rerum natura of cold-producing medium and the temperature T of being surveyed and pressure P
OilDensity p with cold-producing medium
Ref
5) concentration of cold-producing medium in oil and the refrigerant mixture is determined in sampling
Concentration with oil
6) density of calculating oil and refrigerant mixture
7) mass M=ρ * V of oil and refrigerant mixture in the calculating compressor;
8) quality of cold-producing medium in calculating oil and the refrigerant mixture
9) in refrigeration system, injects cold-producing medium with the equal in quality of sampling by the cold-producing medium injection device;
10) by oil injection apparatus in compressor, inject with the sampling equal in quality oil;
Described step 5 is determined the concentration of cold-producing medium in oil and the refrigerant mixture by sampling
Concentration with oil
Specific practice is: at first open A1 stop valve (5) and B1 stop valve (6), close C1 stop valve (7), utilize vacuum pump (4) that sampling circuit is vacuumized then, close A1 stop valve (5) after exhausting vacuum, B1 stop valve (6) unloads down-sampling bucket (14) and utilizes electronic scale to weigh to be designated as W
1Again load onto sampling bucket (14), open A1 stop valve (5), B1 stop valve (6) vacuumizes once more, close A1 stop valve (5) after vacuumizing end, open the C1 stop valve (7) that is connected with compressor (1), utilize sampling bucket (14) that oil and refrigerant mixture in the compressor (1) are sampled, close A1 stop valve (5) after sampling finishes, B1 stop valve (6) unloads down-sampling bucket (14) and utilizes electronic scale to weigh to be designated as W
2, slowly open the B1 stop valve (6) on the sampling bucket (14) then, discharge the cold-producing medium in the sampling bucket (14), when the reading of electronic scale no longer descended, the sampling bucket (14) of remaining oil weighed was designated as W
3, the quality of the oil that sampling obtains is (W
3-W
1), the quality of the cold-producing medium that sampling obtains is (W
2-W
3), the gross mass of potpourri is (W
2-W
1), the concentration of cold-producing medium is in the potpourri
The concentration of oil is in the potpourri
2. the method for measuring refrigerant quality in the compressor oil with liquid level method and sampling method in real time according to claim 1, it is characterized in that described step 9, the method of injecting cold-producing medium in refrigeration system is that refrigerant tank (20) is placed on the B electronic scale (22), open A3 stop valve (11), B3 stop valve (12) and C3 stop valve (13), slowly open B variable valve (18) then, inlet to gas-liquid separator (2) injects cold-producing medium, the quality (W of the cold-producing medium of obtaining when the quality of injecting cold-producing medium and sampling
2-W
3) when equating, close B variable valve (18), A3 stop valve (11), B3 stop valve (12) and C3 stop valve (13).
3. the method for measuring refrigerant quality in the compressor oil with liquid level method and sampling method in real time according to claim 1, it is characterized in that described step 10, the method of injecting oil in compressor (1) is that high pressure oil tank (19) is placed on the A electronic scale (21), open A2 stop valve (8), B2 stop valve (9) and C2 stop valve (10), slowly open A variable valve (17) then, inject oil, the quality (W of the oil of when the quality of injecting oil and sampling, obtaining to compressor (1)
3-W
1) when equating, close A variable valve (17), A2 stop valve (8), B2 stop valve (9) and C2 stop valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100234490A CN1296694C (en) | 2005-01-20 | 2005-01-20 | Method for real-time measuring refrigerant quality of compressor oil by level and sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100234490A CN1296694C (en) | 2005-01-20 | 2005-01-20 | Method for real-time measuring refrigerant quality of compressor oil by level and sampling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1645095A CN1645095A (en) | 2005-07-27 |
| CN1296694C true CN1296694C (en) | 2007-01-24 |
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|---|---|---|---|
| CNB2005100234490A Expired - Fee Related CN1296694C (en) | 2005-01-20 | 2005-01-20 | Method for real-time measuring refrigerant quality of compressor oil by level and sampling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2924416A1 (en) * | 2014-03-12 | 2015-09-30 | SKF Lubrication Systems Germany GmbH | Method and device for determining the pure lubricant content of a lubricant taken from a bearing assembly |
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| CN101685057B (en) * | 2008-09-27 | 2011-06-15 | 宝山钢铁股份有限公司 | Non-contact solution concentration detection method and device thereof |
| CN104634015B (en) * | 2013-11-14 | 2017-08-01 | 珠海格力电器股份有限公司 | The draw-out device and abstracting method of compressor lubricant oil |
| CN104677779B (en) * | 2013-11-28 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of method and measurement system for determining fluid density |
| CN105987860B (en) * | 2015-02-05 | 2019-07-12 | 上海海立电器有限公司 | Measure the method and device of refrigerant solubility in refrigerator oil |
| CN105181392B (en) * | 2015-08-17 | 2018-03-16 | 石家庄国祥运输设备有限公司 | The sampling frock and the methods of sampling of a kind of air-conditioner set refrigerant |
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| CN105717259A (en) * | 2016-03-08 | 2016-06-29 | 广东美的制冷设备有限公司 | Refrigerant distribution testing system and method |
| CN106288556B (en) * | 2016-08-09 | 2017-11-24 | 珠海格力电器股份有限公司 | A kind of acquisition device of oil content, acquisition methods and air-conditioning system |
| CN106404598A (en) * | 2016-08-30 | 2017-02-15 | 安徽华润金蟾药业股份有限公司 | Method for detecting ethanol concentration in cinobufagin ethanol precipitation process |
| KR102175816B1 (en) | 2017-07-31 | 2020-11-06 | 주식회사 엘지화학 | Quantitative analysis apparatus for oxygen produced from cell materials |
| CN111122249A (en) * | 2019-12-06 | 2020-05-08 | 合肥通用机械研究院有限公司 | High-precision full-automatic sampling device and method for measuring oil content of refrigerant |
| CN111473555A (en) * | 2020-05-09 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Refrigerating system, refrigerant filling method and device thereof and air conditioner |
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| JP2002267287A (en) * | 2001-03-08 | 2002-09-18 | Mitsubishi Electric Corp | Method for manufacturing product, and compressor technology information device |
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-
2005
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Patent Citations (4)
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|---|---|---|---|---|
| US6202433B1 (en) * | 1999-03-19 | 2001-03-20 | Spx Corporation | Protection system for refrigerant identification detector |
| JP2002267287A (en) * | 2001-03-08 | 2002-09-18 | Mitsubishi Electric Corp | Method for manufacturing product, and compressor technology information device |
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Cited By (1)
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| EP2924416A1 (en) * | 2014-03-12 | 2015-09-30 | SKF Lubrication Systems Germany GmbH | Method and device for determining the pure lubricant content of a lubricant taken from a bearing assembly |
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| CN1645095A (en) | 2005-07-27 |
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