CN101949619A - Lubricating oil and refrigerant separation device of refrigerating unit and operating method thereof - Google Patents
Lubricating oil and refrigerant separation device of refrigerating unit and operating method thereof Download PDFInfo
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- CN101949619A CN101949619A CN 201010274029 CN201010274029A CN101949619A CN 101949619 A CN101949619 A CN 101949619A CN 201010274029 CN201010274029 CN 201010274029 CN 201010274029 A CN201010274029 A CN 201010274029A CN 101949619 A CN101949619 A CN 101949619A
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Abstract
The invention discloses a lubricating oil and refrigerant separation device of a refrigerating unit and an operating method thereof. The lubricating oil and refrigerant separation device of the refrigerating unit comprises an evaporator, a condenser and a gear box of a compressor, wherein the gear box is connected with a motor, and the motor is communicated with the condenser through a pipeline. The separation device is characterized by also comprising a variable frequency electromagnetic pump, wherein the variable frequency electromagnetic pump is arranged on the pipeline between the gear box and the evaporator; the inlet of the variable frequency electromagnetic pump is provided with a filter, the outlet of the variable frequency electromagnetic pump is provided with a first branch and a second branch, the first branch is communicated with the gear box, the second branch is communicated with the motor, a first electromagnetic valve is arranged in the first branch, and a second electromagnetic valve is arranged in the second branch; the upper part of the gear box is provided with an oil-gas separator; and a one-way valve is arranged on the pipeline between the motor and the condenser. The separation device has the characteristics of flexible operation, high reliability, enforcement on oil return of the evaporator, capability of enforcing cooling of the motor during running in small difference between the condensation pressure and the evaporation pressure, and wide application range.
Description
Technical field
The present invention relates to lubricating oil and the refrigerant separator and the method for operating thereof of a kind of refrigeration unit, particularly a kind of refrigeration unit.
Background technology
Traditional refrigeration unit does not have the reply of pressure device when the less operating mode operation of condensing pressure and evaporating pressure difference, just utilize the power of injector as the evaporimeter oil return on the pipeline between evaporimeter and the gear-box, the high-pressure side of injector uses condenser gas or uses the hydraulic oil of oil pump.Have only a choke valve between condenser and the motor, no magnetic valve does not have check valve yet.
Refrigeration unit uses the gas ejector of condenser that the oil in the evaporimeter is recovered in the compressor, and utilizes the pressure reduction between condenser and the evaporimeter to be the power cool motors; But when refrigeration unit during in the less operating mode operation of condensing pressure and evaporating pressure difference, condenser pressure reduces, and injection power weakens, and the evaporimeter recirculating oil quantity reduces; Simultaneously, condenser pressure reduces, and also causes the liquid supply rate of cooling motor to reduce, and the motor cooling is not enough, will reduce the refrigeration unit operational reliability and the scope of application greatly like this.
In addition, the conventional motors type of cooling is when starting or stopping, because the pressure reduction between condenser and the evaporimeter is minimum, can't forces cooling to motor, thereby cause the motor internal temperature too high, influences the service life of motor.
Summary of the invention
Purpose of the present invention aims to provide a kind of simple and reasonable, flexible operation, cost of manufacture is low, reliability is high, the oil return of forced evaporation device, and can force when the less operation of condensing pressure and evaporating pressure difference that motor cools off, lubricating oil and the refrigerant separator and the method for operating thereof of refrigeration unit applied widely, to overcome weak point of the prior art.
Press the lubricating oil and the refrigerant separator of a kind of refrigeration unit of this purpose design, comprise evaporimeter, the gear-box of condenser and compressor, gear-box and motor join, motor is communicated with condenser by pipeline, its architectural feature is also to comprise the variable-frequency electromagnetic pump, the variable-frequency electromagnetic pump is arranged on the pipeline between gear-box and the evaporimeter, the inlet of variable-frequency electromagnetic pump is provided with filter, the variable-frequency electromagnetic pump discharge is provided with first branch road and second branch road, first branch road is communicated with gear-box, second branch road is communicated with motor, be provided with first magnetic valve in first branch road, be provided with second magnetic valve in second branch road, the top of gear-box is installed and is equipped with gs-oil separator, and the pipeline between motor and the condenser is provided with check valve.
Be provided with the 3rd magnetic valve between described check valve and the condenser.
Described variable-frequency electromagnetic pump is according to the different variable frequency adjustment of carrying out with the traffic demand of second branch road of first branch road.
The method of operating of a kind of lubricating oil of refrigeration unit and refrigerant separator, the mixture that it is characterized in that first branch road transmission lubricating oil and refrigerant is to gear-box, when the mixture of first branch road in gear-box by the heating of the lubricating oil in spiral case and the gear-box after, refrigerant becomes gas through behind the oil eliminator, get back to the air entry of compressor, directly get back to gear-box through separated lubricating oil, finish oil return; First branch road is provided with first magnetic valve that is used to control this first branch road, closes this first magnetic valve when refrigeration unit starts or stops process; Second branch road is provided with second magnetic valve that is used to control this second branch road, when refrigeration unit in condensing pressure and the less operating mode work of evaporating pressure difference, perhaps refrigeration unit is in when starting or stoping process, second magnetic valve is opened, the lubricating oil that the transmission evaporimeter is come and the mixture of refrigerant are forced cooling motor to motor; Check valve on the pipeline between condenser and the motor, in the time of can preventing that second magnetic valve from opening, the variable-frequency electromagnetic pump is transported to the mixture of lubricating oil in the evaporimeter and refrigerant in the condenser; Simultaneously the 3rd magnetic valve is in closed condition, and when treating that refrigeration unit breaks away from the less operating mode of condensing pressure and evaporating pressure difference, the 3rd magnetic valve is opened, and then with second closed electromagnetic valve, realizes switching.
When refrigeration unit operated in high evaporation pressure or low condensing pressure operating mode, conventional motor cooling means was to cool off for fluorine by the pressure differential of condenser side and motor side, just provides refrigerant to cool off.Because refrigeration unit is in condensing pressure and the less operating mode operation of evaporating pressure difference operation; its pressure differential is not enough to overcome the gravity of refrigerant and refrigerant at pipeline during along journey and local resistance loss; to cause motor cooling effect difference and cause that the motor winding temperature is overheated; finally cause causing the protection parking; influence the normal use of refrigeration unit, and influence the insulating properties and the life-span of motor winding.The present invention utilizes the variable-frequency electromagnetic pump from the lubricating oil of evaporimeter transporting low temperature liquid state and the mixture of refrigerant the stator and the rotor of motor to be forced the hydrojet protection.When refrigeration unit starts or stops; the variable-frequency electromagnetic pump is forced to force cooling from the mixture of the lubricating oil of evaporimeter transporting low temperature liquid state and refrigerant to motor; thereby shorten the blanking time that refrigeration unit is restarted greatly; can better meet the harsh requirement that requires behind the refrigeration unit hang-up in the industries such as petrochemical industry, metallurgy and medicine to restart immediately, and increase the number of starts of motor in the short time.
Refrigeration unit among the present invention operates in low pressure reduction operating mode following time, and the variable-frequency electromagnetic pump replaces nature pressure reduction road to force for the fluorine cooling, has enlarged refrigeration unit and has adapted to low-temperature cooling water operating condition scope.When the evaporating pressure of refrigeration unit and the pressure reduction between the condensing pressure were set up and reached certain numerical value, the variable-frequency electromagnetic pump stopped and switching to nature pressure reduction road supply fluorine to cool off automatically, to satisfy energy-conservation demand.
Electromagnetic pump among the present invention adopts the frequency conversion scheme, has solved the problem that motor cooling and lubricating oil separation flow have big difference.
Refrigeration unit among the present invention is when condensing pressure and the less operation of evaporating pressure difference, can rely on the variable-frequency electromagnetic pump to force the motor cooling, and when refrigeration unit starts or stops, forcing the motor cooling, can greatly improve the reliability and the range of operation of refrigeration unit.
In sum, the present invention has simple and reasonable, flexible operation, cost of manufacture is low, reliability is high, the oil return of forced evaporation device, and can force motor to cool off and advantage of wide range of application when condensing pressure and the less operation of evaporating pressure difference.
Description of drawings
Fig. 1 is one embodiment of the invention structural representation.
Among the figure: 1 is first magnetic valve, and 2 is second magnetic valve, and 3 is the variable-frequency electromagnetic pump, and 4 is filter, and 5 is check valve, and 6 is gs-oil separator, and 7 is gear-box, and 8 is motor, and 9 is evaporimeter, and 10 is condenser, and 11 is the 3rd magnetic valve.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 1, lubricating oil of this refrigeration unit and refrigerant separator, comprise evaporimeter 9, the gear-box 7 of condenser 10 and compressor, gear-box 7 joins with motor 8, motor 8 is communicated with condenser 10 by pipeline, variable-frequency electromagnetic pump 3 is arranged on the pipeline between gear-box 7 and the evaporimeter 9, the inlet of variable-frequency electromagnetic pump 3 is provided with filter 4,3 outlets of variable-frequency electromagnetic pump are provided with first branch road and second branch road, first branch road is communicated with gear-box 7, second branch road is communicated with motor 8, be provided with first magnetic valve 1 in first branch road, be provided with second magnetic valve 2 in second branch road, the top of gear-box 7 is installed and is equipped with gs-oil separator 6, and the pipeline between motor 8 and the condenser 10 is provided with check valve 5.Be provided with the 3rd magnetic valve 11 between check valve 5 and the condenser 10.Gear-box 7 in the present embodiment has the effect of fuel tank concurrently.
During work, the present invention uses variable-frequency electromagnetic pump 3 to extract the mixture cooling motor 8 of lubricating oil and refrigerant from evaporimeter 9, to be provided at low pressure reduction, it is the pressure differential between condensing pressure and the evaporating pressure, the necessary coolant quantity of motor 8 coolings during running, and provide when hanging down pressure reduction, the oil return demand of evaporimeter 9, and use the 3rd magnetic valve 11 and second magnetic valve 2 to realize the switching of pipeline between second branch road and condenser 10 and the motor 8 by control logic.Be embodied in: the mixture of first branch road transmission lubricating oil and refrigerant is to gear-box 7, when the mixture of first branch road in gear-box 7 by the heating of the lubricating oil in spiral case and the gear-box 7 after, refrigerant becomes gas through behind the oil eliminator 6, get back to the air entry of compressor, directly get back to gear-box 7 through separated lubricating oil, finish oil return; First branch road is provided with first magnetic valve 1 that is used to control this first branch road, closes this first magnetic valve 1 when refrigeration unit starts or stops process; Second branch road is provided with second magnetic valve 2 that is used to control this second branch road, when refrigeration unit in condensing pressure and the less operating mode work of evaporating pressure difference, perhaps refrigeration unit is in when starting or stoping process, second magnetic valve 2 is opened, the lubricating oil that transmission evaporimeter 9 is come and the mixture of refrigerant are forced cooling motor 8 to motor 8; Check valve 5 on the pipeline between condenser 10 and the motor 8, in the time of can preventing that second magnetic valve 2 from opening, variable-frequency electromagnetic pump 3 is transported to the mixture of lubricating oil in the evaporimeter 9 and refrigerant in the condenser 10; Simultaneously the 3rd magnetic valve 11 is in closed condition, and when treating that refrigeration unit breaks away from the less operating mode of condensing pressure and evaporating pressure difference, the 3rd magnetic valve 11 is opened, and then second magnetic valve 2 cuts out, and realizes switching.
In refrigeration unit, lubricating oil has been carried out the full automatic recovery that separates with the mixture of refrigerant, and to forcing the cooling matchmaker to cool off when hanging down pressure reduction with the motor of refrigerant cooling, stator and rotor to motor when refrigeration unit starts and stops force hydrojet to be cooled off.
After the present invention can pass through variable-frequency electromagnetic pump 3 adherence pressures with the mixture of lubricating oil in the evaporimeter and refrigerant, be transported in the gear-box of compressor, utilize the high-temperature exhaust air of spiral case and the heat of the lubricating oil behind the cooling bearing, the principle different with the boiling point of refrigerant according to lubricating oil separated.After the gaseous coolant of evaporation filtered by gs-oil separator 6 after separating, the air entry that is inhaled into compressor once more participated in kind of refrigeration cycle.
Claims (4)
1. the lubricating oil of a refrigeration unit and refrigerant separator, comprise evaporimeter (9), the gear-box (7) of condenser (10) and compressor, gear-box (7) joins with motor (8), motor (8) is communicated with condenser (10) by pipeline, it is characterized in that also comprising variable-frequency electromagnetic pump (3), variable-frequency electromagnetic pump (3) is arranged on the pipeline between gear-box (7) and the evaporimeter (9), the inlet of variable-frequency electromagnetic pump (3) is provided with filter (4), variable-frequency electromagnetic pump (3) outlet is provided with first branch road and second branch road, first branch road is communicated with gear-box (7), second branch road is communicated with motor (8), be provided with first magnetic valve (1) in first branch road, be provided with second magnetic valve (2) in second branch road, the top of gear-box (7) is installed and is equipped with gs-oil separator (6), and the pipeline between motor (8) and the condenser (10) is provided with check valve (5).
2. the lubricating oil of refrigeration unit according to claim 1 and refrigerant separator is characterized in that being provided with the 3rd magnetic valve (11) between described check valve (5) and the condenser (10).
3. the lubricating oil of refrigeration unit according to claim 1 and refrigerant separator is characterized in that described variable-frequency electromagnetic pump (3) is according to the different variable frequency adjustment of carrying out with the traffic demand of second branch road of first branch road.
4. the method for operating of the lubricating oil of a refrigeration unit according to claim 1 and refrigerant separator, the mixture that it is characterized in that first branch road transmission lubricating oil and refrigerant is to gear-box (7), when the mixture of first branch road in gear-box (7) by the heating of the lubricating oil in spiral case and the gear-box (7) after, after refrigerant becomes gas process oil eliminator (6), get back to the air entry of compressor, directly get back to gear-box (7) through separated lubricating oil, finish oil return; First branch road is provided with first magnetic valve (1) that is used to control this first branch road, when the refrigeration unit process of starting or stoping is closed this first magnetic valve (1); Second branch road is provided with second magnetic valve (2) that is used to control this second branch road, when refrigeration unit in condensing pressure and the less operating mode work of evaporating pressure difference, perhaps refrigeration unit is in the process of starting or stoping, second magnetic valve (2) is opened, the lubricating oil that transmission evaporimeter (9) is come and the mixture of refrigerant are forced cooling motor (8) to motor (8); Check valve (5) on the pipeline between condenser (10) and the motor (8), in the time of can preventing that second magnetic valve (2) from opening, variable-frequency electromagnetic pump (3) is transported to the mixture of lubricating oil in the evaporimeter (9) and refrigerant in the condenser (10); Simultaneously the 3rd magnetic valve (11) is in closed condition, and when treating that refrigeration unit breaks away from the less operating mode of condensing pressure and evaporating pressure difference, the 3rd magnetic valve (11) is opened, and then second magnetic valve (2) cuts out, and realizes switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010274029A CN101949619B (en) | 2010-08-31 | 2010-08-31 | Lubricating oil and refrigerant separation device of refrigerating unit and operating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010274029A CN101949619B (en) | 2010-08-31 | 2010-08-31 | Lubricating oil and refrigerant separation device of refrigerating unit and operating method thereof |
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| CN101949619A true CN101949619A (en) | 2011-01-19 |
| CN101949619B CN101949619B (en) | 2012-10-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104956164A (en) * | 2013-01-25 | 2015-09-30 | 特灵国际有限公司 | Refrigerant cooling and lubrication system with refrigereant source access from an evaporator |
| CN107196462A (en) * | 2017-07-17 | 2017-09-22 | 珠海格力电器股份有限公司 | Centrifugal refrigerating machines, central air-conditioning and dewing-proof method |
| CN111219900A (en) * | 2018-11-27 | 2020-06-02 | 斯凯孚公司 | Cooling system and method for operating a cooling system |
| US11029065B2 (en) | 2015-10-15 | 2021-06-08 | Carrier Corporation | Multi-stage oil batch boiling system |
| CN113162281A (en) * | 2021-03-02 | 2021-07-23 | 华中科技大学 | External rotor electric machine with cooling structure |
| US20220074633A1 (en) * | 2019-05-29 | 2022-03-10 | Carrier Corporation | Lubricant recovery system for heat exchange system and heat exchange system |
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| CN107196462A (en) * | 2017-07-17 | 2017-09-22 | 珠海格力电器股份有限公司 | Centrifugal refrigerating machines, central air-conditioning and dewing-proof method |
| CN107196462B (en) * | 2017-07-17 | 2024-01-19 | 珠海格力电器股份有限公司 | Centrifugal water chilling unit, central air conditioner and condensation prevention method |
| CN111219900A (en) * | 2018-11-27 | 2020-06-02 | 斯凯孚公司 | Cooling system and method for operating a cooling system |
| CN111219900B (en) * | 2018-11-27 | 2023-11-10 | 斯凯孚公司 | Cooling system and method for operating a cooling system |
| US20220074633A1 (en) * | 2019-05-29 | 2022-03-10 | Carrier Corporation | Lubricant recovery system for heat exchange system and heat exchange system |
| CN113162281A (en) * | 2021-03-02 | 2021-07-23 | 华中科技大学 | External rotor electric machine with cooling structure |
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| CN101949619B (en) | 2012-10-10 |
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Effective date of registration: 20131216 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: Midea Group Co., Ltd. Address before: 528300, Guangdong, Foshan Town, Shunde District, Beijiao Province, beautiful avenue, beautiful headquarters building, B28 science and technology management department Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
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Application publication date: 20110119 Assignee: Chongqing Midea General Refrigerating Equipment Co., Ltd. Assignor: Midea Group Co., Ltd. Contract record no.: 2014440000066 Denomination of invention: Lubricating oil and refrigerant separation device of refrigerating unit and operating method thereof Granted publication date: 20121010 License type: Exclusive License Record date: 20140226 |
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