CN102767926A - Capillary anti-blocking structural assembly of low-temperature refrigerator and controlling method for assembly - Google Patents
Capillary anti-blocking structural assembly of low-temperature refrigerator and controlling method for assembly Download PDFInfo
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- CN102767926A CN102767926A CN2012102279706A CN201210227970A CN102767926A CN 102767926 A CN102767926 A CN 102767926A CN 2012102279706 A CN2012102279706 A CN 2012102279706A CN 201210227970 A CN201210227970 A CN 201210227970A CN 102767926 A CN102767926 A CN 102767926A
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Abstract
The invention discloses a capillary anti-blocking structural assembly of a low-temperature refrigerator and a controlling method for the assembly. The assembly comprises a compressor, an oil return pipe, an oil separator, a condensation fan, a condenser, a drying filter, an electric control board, a capillary and an evaporator. The assembly is characterized in that two ends of the capillary are connected with electric heaters or integrally covers the electric heaters; temperatures of the inlet and outlet parts of the capillary are controlled in an electric heating mode; according to the capillary oil blockage and ice blockage forming principle, for preventing the capillary from being blocked and preventing the working performance of a refrigerating system from being affected at the same time, the capillary part is generally heated in the running process of the refrigerating system and at the stop stage of the compressor; according to types of a refrigerant and lubricating oil adopted by the refrigerating system, the temperatures of the heated parts are controlled, so that blockage is prevented, and the working medium of the system is prevented from being deteriorated by excessive heating; and the refrigerating performance of the low-temperature refrigerator is prevented from being affected by excessive heating.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, relate in particular to anti-blocking construction package of a kind of low temperature refrigerator capillary and control method thereof.
Background technology
The compressor that uses in the refrigeration product at present needs from lubricated, needs to add specific lubricating oil usually.And in the refrigeration system running, always have a spot of oil and participate in the circulation of refrigeration system.For low temperature refrigerator, especially adopt the low temperature level refrigeration system of multi-stage refrigerating circulation, the lubricating oil in the system is owing to the reduction of temperature, and viscosity increases and is difficult to flow.Gap in the refrigeration system operation; During compressor shutdown, because the pressure differential at capillary two ends fades away, the flow of refrigerant in the system stops; The effect that utilizes cold-producing medium and lubricating oil intersolubility that lubricating oil is taken back compressor disappears; Be prone to this moment lubricated congesting of oil take place and condense, may cause capillary to stop up, cause the system failure.
For low temperature refrigerator, because system is comparatively complicated, system pipeline is longer simultaneously, and the lubricating oil that is adopted is prone to absorb reasons such as moisture, and common intrasystem moisture content is difficult to effectively be controlled in the low scope.These micro-moistures, the formation ice crystal that under low temperature environment, can condense in the refrigeration system cyclic process, is prone to build up in the capillary end position, takes place thereby cause stopping up.
For the refrigerator that the stifled or stifled fault of ice of oil takes place, part can be risen again to normal temperature through refrigeration system, after treating that oil is stifled or ice is stifled and melting, starts the circulation of compressor restorable system once more, realizes normally refrigeration; And a part is difficult to melt because the tamper accumulation is too much, and the pressure differential that relies on compressor operating to produce merely can't be broken through tamper.For the refrigerator of this type of fault, then can only open refrigeration pipe system and carry out system's flushing, change device for drying and filtering etc., repair is complicated, and refrigerator is longer break period.
Traditional way has the following aspects.In the compressor air-discharging exit position oil eliminator is set, reduces the oil content in the cold-producing medium; In the capillary front portion device for drying and filtering is set, the moisture in the cold-producing medium is absorbed; Before the refrigeration pipe assembling pipeline is carried out special flushing, remove impurity in the pipeline or the like.Through above measure, improve the cleanliness factor in the refrigeration pipe, reduce oil-containing, moisture content in the refrigerant-cycle systems.For general refrigerator, this type of way can satisfy grease proofing stifled, the anti-icing stifled needs of refrigeration system preferably.
In addition; When solving, repairing the refrigerator refrigeration system fault that generation oil is stifled, ice is stifled; Also can see the method that passive means such as adopting system pipeline vibration, cold-producing medium pulsatile impact, capillary inlet place's heating are repaired, like Chinese patent 201110345852.0 disclosed a kind of PULSE HEATING anti-clogging refrigerators, it discloses and on the link of said capillary and device for drying and filtering, has been with electric heater; When capillary takes place to stop up; Utilize high temperature that the work of organic impurities such as greasy dirt heating back through the compressor pulsed is blown out impurity, eliminate and stop up, though this kind method can solve the capillary blocking problem; But it is the processing method after capillary stops up; Fundamentally do not prevent the generation of blockage problem, use in the electrically heated process at it and the temperature of electric heater is not controlled yet, may cause damage (for example causing deterioration of lubricant etc.) the refrigeration performance or the refrigeration plant of refrigeration plant.
Summary of the invention
The objective of the invention is to propose anti-blocking construction package of a kind of low temperature refrigerator capillary and control method; After compressor quits work; Temperature increase is to safe range when through automatically controlled plate control electric boiling plate capillary being heated; Just can improve the flowability of lubricating oil, eliminate the ice crystal that the minor amount of water branch produces, effectively prevent the generation of above plugging fault.
For reaching this purpose, the present invention adopts following technical scheme:
The anti-blocking construction package of a kind of low temperature refrigerator capillary; Comprise: through compressor, oil eliminator, condenser, device for drying and filtering, capillary, the evaporimeter of the connection of connecting line closed loop successively; Wherein also be provided with return line between compressor and the oil eliminator; Said condenser is provided with condensation fan, it is characterized in that, is provided with the electric heater that said capillary is heated.
As a preferred version of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary, said electric heater is arranged on said two ends capillaceous, perhaps, and the said capillary of the whole covering of said electric heater.Said capillary two ends are connected with electric heater or said capillary monolithic is coated with said electric heater.
A preferred version as the anti-blocking construction package of above-mentioned low temperature refrigerator capillary; Said low temperature refrigerator also comprises automatically controlled plate; Said electric heater is connected with automatically controlled plate, the switch that said electric orifice plate is used to control said electric heater with and operating temperature, working time.
As a preferred version of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary, electric heater adopts flexible electrical heater strip or electric heating sheets.
A preferred version as the anti-blocking construction package of above-mentioned low temperature refrigerator capillary; The capillary entrance end is provided with electric heater; Electrical heating wire or electric heating sheets swathe respectively in the joint portion of condensator outlet end and capillary entrance point, and the joint portion of capillary outlet end and evaporator end.
As a preferred version of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary, the length that swathes of electrical heating wire or electric heating sheets is 90 ~ 110mm.
As a preferred version of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary, the length that swathes of electrical heating wire or electric heating sheets is 100mm.
As a preferred version of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary, said capillary coiling forms discoid, and said capillary monolithic is coated with said electric heater, and said electric heater is used for capillary monolithic is heated.
The control method of the anti-blocking construction package of a kind of low temperature refrigerator capillary is characterized in that, comprises,
Step 1: the low temperature refrigerator start, electric heater is started working earlier, makes the capillary pipe end reach second design temperature;
Step 2: judge whether storing temperature reaches first design temperature in the case,, then move compressor system is freezed if do not reach first design temperature; After storage the temperature inside the box reached first preset temperature, compressor shutdown got into step 3;
Step 3: during compressor shutdown, judge whether the capillary end temperature reaches second design temperature, as do not reach second design temperature that then electric heater operation to the capillary end heating, makes the capillary pipe end reach second design temperature; After the capillary end temperature reached second preset temperature, electric heater stopped heating, got into step 4;
Step 4: during compressor shutdown, whether judges imports stopping signal, if the user imports stopping signal, then gets into step 5; If the user does not import stopping signal, rebound step 2 then;
Step 5: the whole outage of low temperature refrigerator, shutdown.
As a preferred version of the control method of the control method of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary,, the temperature of electric heater is controlled according to cold-producing medium and the lubricating oil type that refrigeration system adopted.
As a preferred version of the control method of the control method of the anti-blocking construction package of above-mentioned low temperature refrigerator capillary, the temperature that said electric heater provides is in the scope that does not influence low temperature refrigerator refrigeration performance and refrigeration device performance.
Beneficial effect of the present invention is: the present invention through adopting electrically heated mode, carries out temperature control to capillary through anti-blocking construction package of a kind of low temperature refrigerator capillary and control method are provided into and out of the position, and it is stifled or ice is stifled to avoid taking place oil; Stifled and the stifled principle that forms of ice when effectively the prevention capillary stops up, for avoiding that the refrigeration system service behaviour is impacted, normally in the refrigeration system running, in the compressor shutdown stage, heats above-mentioned capillary position according to capillary oil; Simultaneously,, the temperature at heating position is controlled, when realizing preventing obstruction to take place, avoided excessive heating to cause systematic working medium that defective generations such as rotten take place according to cold-producing medium and the lubricating oil type that refrigeration system adopted; Also to avoid excessive heating that the low temperature refrigerator refrigeration performance is produced considerable influence on the other hand.
Description of drawings
Fig. 1 is the structural representation of the anti-blocking low temperature refrigerator of capillary that provides of the specific embodiment of the invention 1;
Fig. 2 is the control flow chart of the anti-blocking low temperature refrigerator of capillary that provides of the specific embodiment of the invention 1.
Wherein:
1: compressor; 2: oil return pipe; 3: oil eliminator; 4: condensation fan; 5: condenser; 6: device for drying and filtering; 7: automatically controlled plate; 8: capillary; 9: electric heater; 10: evaporimeter.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and through the specific embodiment.
As shown in Figure 1; The anti-blocking construction package of a kind of low temperature refrigerator capillary; Comprise: compressor 1, oil eliminator 3, condenser 5, device for drying and filtering 6, capillary 8, evaporimeter 10 through connecting line closed loop successively connects, wherein also be provided with oil return pipe 2 between compressor and the oil eliminator, said condenser 5 is provided with condensation fan 4; Compressor 1 air exit position is provided with oil eliminator 3, is used for reducing the oil content of cold-producing medium; In capillary 8 front portions device for drying and filtering 6 is set, is used for the moisture of cold-producing medium is absorbed, wherein the two ends of capillary 8 also are connected with electric heater 9 or capillary 8 integral body are coated with electric heater.In this embodiment, the two ends of capillary 8 have swathed electric heater 9.
Said low temperature refrigerator also comprises automatically controlled plate 7, and electric heater 9 is connected with automatically controlled plate 7, the switch that automatically controlled plate 7 is used to control electric heater 9 with and operating temperature, working time; Control electric heater 9 after compressor 1 quits work, begin to control electric heater 9, whether the temperature that automatically controlled plate 7 detects capillaries 8 places reaches design temperature, if reach then electric heater 9 is not worked, if do not reach, electric heater 9 is started working; The design temperature of electric heater 9 is controlled the temperature at heating position according to cold-producing medium and lubricating oil type that refrigeration system adopted, when realizing preventing obstruction to take place, avoids excessive heating to cause systematic working medium that defective generations such as rotten take place; Also to avoid excessive heating that the low temperature refrigerator refrigeration performance is produced considerable influence (for example causing deterioration of lubricant etc.) on the other hand.
Electric heater 9 adopts flexible electrical heater strip or electric heating sheets; The entrance end of capillary 8 is provided with a heater 9; Electrical heating wire or electric heating sheets are wrapped in the joint portion of condenser 5 ports of export and capillary 8 entrance points respectively; And the joint portion of capillary 8 ports of export and evaporimeter 10 entrance points, wherein the length that swathes of electrical heating wire or electric heating sheets is 90 ~ 110mm, the length that swathes of electric heating sheets is 100mm in this embodiment.
In refrigeration plant capillary 8 often coil into discoid, so, can also heat the integral body of capillary 8 and prevent that capillary from stopping up except the mode of capillary 8 two ends heating.
No matter the condense obstruction that takes place still is that the micro-moisture ice crystal that takes place that condenses stops up for oil, and is all closely related with the temperature of environment of living in.So through these temperature that are prone to the generation blocking portion are increased in the safe temperature scope with capillary import and export end; Just can improve the flowability of lubricating oil; Eliminate the ice crystal that the minor amount of water branch produces; The effectively generation of the above plugging fault of prevention, thus the normal reliability of operation of low temperature refrigerator refrigeration system improved greatly.
As shown in Figure 2, a kind of low temperature refrigerator capillary anti-blocking control method comprises,
Step 1: the low temperature refrigerator start, electric heater is started working earlier, makes the capillary pipe end reach second design temperature;
Step 2: judge whether storing temperature reaches first design temperature in the case,, then move compressor system is freezed if do not reach first design temperature; After storage the temperature inside the box reached first preset temperature, compressor shutdown got into step 3;
Step 3: during compressor shutdown, judge whether the capillary end temperature reaches second design temperature, as do not reach second design temperature that then electric heater operation to the capillary end heating, makes the capillary pipe end reach second design temperature; After the capillary end temperature reached second preset temperature, electric heater stopped heating, got into step 4;
Step 4: during compressor shutdown, whether judges imports stopping signal, if the user imports stopping signal, then gets into step 5; If the user does not import stopping signal, rebound step 2 then;
Step 5: the whole outage of low temperature refrigerator, shutdown.
When realizing preventing to stop up generation, avoid excessive heating to cause systematic working medium that defective such as rotten takes place; Also to avoid excessive heating that the low temperature refrigerator refrigeration performance is produced considerable influence on the other hand; Need be according to cold-producing medium and the lubricating oil type that refrigeration system adopted; Temperature to electric heater 9 is controlled, and the temperature that electric heater 9 provides need be in the scope that does not influence low temperature refrigerator refrigeration performance and refrigeration device performance.Traditional oil eliminator, device for drying and filtering and refrigeration pipe process of washing of being provided with, the impurity that can effectively avoid greater particle size is for obstruction capillaceous.And for low temperature refrigerator, a big chunk reason that capillary takes place to stop up is that oil is stifled or ice is stifled.
The present invention be directed to the main formation reason that low temperature refrigerator generation capillary stops up, adopt electrically heated mode, capillary is carried out temperature control into and out of the position, it is stifled or ice is stifled to avoid taking place oil.Stifled and the stifled principle that forms of ice when effectively the prevention capillary stops up, for avoiding that the refrigeration system service behaviour is impacted, normally in the refrigeration system running, in the compressor shutdown stage, heats above-mentioned capillary position according to capillary oil.Simultaneously,, the temperature at heating position is controlled, when realizing preventing obstruction to take place, avoided excessive heating to cause systematic working medium that defective generations such as rotten take place according to cold-producing medium and the lubricating oil type that refrigeration system adopted; Also to avoid excessive heating that the low temperature refrigerator refrigeration performance is produced considerable influence on the other hand.
More than combine specific embodiment to describe know-why of the present invention.These are described just in order to explain principle of the present invention, and can not be interpreted as the restriction to protection domain of the present invention by any way.Based on the explanation here, those skilled in the art need not pay performing creative labour can associate other specific embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. the anti-blocking construction package of the capillary of a low temperature refrigerator; Comprise; Compressor, oil eliminator, condenser, device for drying and filtering, capillary, evaporimeter through connecting line closed loop successively connects wherein also are provided with oil return pipe between compressor and the oil eliminator, said condenser is provided with condensation fan; It is characterized in that, be provided with the electric heater that said capillary is heated.
2. assembly according to claim 1 is characterized in that, said electric heater is arranged on said two ends capillaceous, perhaps, and the said capillary of the whole covering of said electric heater.
3. assembly according to claim 1 is characterized in that said low temperature refrigerator also comprises automatically controlled plate, and said electric heater is connected with automatically controlled plate, the switch that said automatically controlled plate is used to control said electric heater with and operating temperature, working time.
4. assembly according to claim 2 is characterized in that, electric heater adopts flexible electrical heater strip or electric heating sheets.
5. assembly according to claim 3; It is characterized in that; The capillary entrance end is provided with electric heater, and electrical heating wire or electric heating sheets swathe respectively in the joint portion of condensator outlet end and capillary entrance point, and the joint portion of capillary outlet end and evaporator end.
6. assembly according to claim 4 is characterized in that, the length that swathes of electrical heating wire or electric heating sheets is 90 ~ 110mm.
7. assembly according to claim 3 is characterized in that, said capillary coiling forms discoid, and said capillary monolithic is coated with said electric heater, and said electric heater is used for capillary monolithic is heated.
8. the control method of the anti-blocking construction package of low temperature refrigerator capillary is characterized in that, comprise,
Step 1: the low temperature refrigerator start, electric heater is started working earlier, makes the capillary pipe end reach second design temperature;
Step 2: judge whether storing temperature reaches first design temperature in the case,, then move compressor system is freezed if do not reach first design temperature; After storage the temperature inside the box reached first preset temperature, compressor shutdown got into step 3;
Step 3: during compressor shutdown, judge whether the capillary end temperature reaches second design temperature, as do not reach second design temperature that then electric heater operation to the capillary end heating, makes the capillary pipe end reach second design temperature; After the capillary end temperature reached second preset temperature, electric heater stopped heating, got into step 4;
Step 4: during compressor shutdown, whether judges imports stopping signal, if the user imports stopping signal, then gets into step 5; If the user does not import stopping signal, rebound step 2 then;
Step 5: the whole outage of low temperature refrigerator, shutdown.
9. control method according to claim 8 is characterized in that, according to cold-producing medium and the lubricating oil type that refrigeration system adopted, the temperature of electric heater is controlled.
10. control method according to claim 8 is characterized in that, the temperature that said electric heater provides is in the scope that does not influence low temperature refrigerator refrigeration performance and refrigeration device performance.
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| CN104344617A (en) * | 2013-07-26 | 2015-02-11 | 中科美菱低温科技有限责任公司 | Self-washing mechanism for ultra-low temperature freezer |
| CN105365257A (en) * | 2015-12-08 | 2016-03-02 | 天津烽能科技有限公司 | Method for processing shut down and 'crash' of biomass compression forming device |
| CN105546641A (en) * | 2015-12-31 | 2016-05-04 | 广东美的制冷设备有限公司 | Air conditioning system, and processing method and device for oil blockage of air conditioning system |
| US9441866B2 (en) | 2013-09-04 | 2016-09-13 | Whirlpool Corporation | Variable expansion device with thermal choking for a refrigeration system |
| CN106670190A (en) * | 2016-10-31 | 2017-05-17 | 西安科技大学 | Automatic refrigerator refrigerating tube cleaning device and method |
| CN108106484A (en) * | 2018-01-30 | 2018-06-01 | 中国科学院理化技术研究所 | A kind of device and method for preventing cryogenic heat exchanger frozen plug |
| CN108266951A (en) * | 2018-01-02 | 2018-07-10 | 中科美菱低温科技股份有限公司 | A kind of method that ultralow temperature equipment ice blocks up intelligent diagnostics |
| CN109737654A (en) * | 2018-12-11 | 2019-05-10 | 珠海格力电器股份有限公司 | A kind of choke detecting method and the unit for being able to detect blocking |
| CN109945600A (en) * | 2019-03-06 | 2019-06-28 | 泉州台商投资区百亚网络科技有限公司 | A kind of semiconductor temperature-control micro vacuum freeze drier |
| CN113483477A (en) * | 2021-07-15 | 2021-10-08 | 青岛海尔空调器有限总公司 | Method for recovering and controlling oil stain in pipe of outdoor unit |
| CN113915891A (en) * | 2021-05-08 | 2022-01-11 | 海信（山东）冰箱有限公司 | Refrigerator and temperature control method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104344617A (en) * | 2013-07-26 | 2015-02-11 | 中科美菱低温科技有限责任公司 | Self-washing mechanism for ultra-low temperature freezer |
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| CN105365257A (en) * | 2015-12-08 | 2016-03-02 | 天津烽能科技有限公司 | Method for processing shut down and 'crash' of biomass compression forming device |
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| CN106670190A (en) * | 2016-10-31 | 2017-05-17 | 西安科技大学 | Automatic refrigerator refrigerating tube cleaning device and method |
| CN108266951A (en) * | 2018-01-02 | 2018-07-10 | 中科美菱低温科技股份有限公司 | A kind of method that ultralow temperature equipment ice blocks up intelligent diagnostics |
| CN108106484A (en) * | 2018-01-30 | 2018-06-01 | 中国科学院理化技术研究所 | A kind of device and method for preventing cryogenic heat exchanger frozen plug |
| CN109737654A (en) * | 2018-12-11 | 2019-05-10 | 珠海格力电器股份有限公司 | A kind of choke detecting method and the unit for being able to detect blocking |
| CN109737654B (en) * | 2018-12-11 | 2024-01-23 | 珠海格力电器股份有限公司 | Blocking detection method and unit capable of detecting blocking |
| CN109945600A (en) * | 2019-03-06 | 2019-06-28 | 泉州台商投资区百亚网络科技有限公司 | A kind of semiconductor temperature-control micro vacuum freeze drier |
| CN113915891A (en) * | 2021-05-08 | 2022-01-11 | 海信（山东）冰箱有限公司 | Refrigerator and temperature control method thereof |
| CN113483477A (en) * | 2021-07-15 | 2021-10-08 | 青岛海尔空调器有限总公司 | Method for recovering and controlling oil stain in pipe of outdoor unit |
| CN113483477B (en) * | 2021-07-15 | 2023-09-19 | 青岛海尔空调器有限总公司 | Method for recycling and controlling oil stain in pipe of outdoor unit |
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Application publication date: 20121107 |