CN105042918A - Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof - Google Patents
Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof Download PDFInfo
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- CN105042918A CN105042918A CN201510295255.XA CN201510295255A CN105042918A CN 105042918 A CN105042918 A CN 105042918A CN 201510295255 A CN201510295255 A CN 201510295255A CN 105042918 A CN105042918 A CN 105042918A
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Abstract
The invention provides a parallel compressors unit capable of self-adaptively operating at low load. The parallel compressors unit comprises compressors, an oil separator, a condenser, a liquid storage device, a filter, a visual liquid lens, an expansion valve and an evaporator, which are connected in sequence in an end-to-end manner. The output end of the oil separator is connected with the input ends of the compressors through a hot gas bypass solenoid valve and a hot gas bypass valve and connected with the input end of the evaporator through an oil supply solenoid valve, and the output end of the filter is connected with the input ends of the compressors through a superheat-removing solenoid valve and a superheat-removing expansion valve. Meanwhile, the invention further provides an implementation method of the self-adaptive operation of the parallel compressors unit at low load. According to the parallel compressors unit and the implementation method thereof, by improving the structure of the parallel compressors unit, the frequent start and stop of one compressor is avoided when the cool storage load is reduced to be below the lowest regulation load, and the problems of temperature fluctuation and oil return of the evaporator are avoided. Meanwhile, a manual control mode is added, so that the parallel compressors unit is stable and saves energy.
Description
Technical field
The present invention relates to a kind of Parallel sets, particularly relate to a kind of Parallel sets and its implementation that can realize self-adapting operation when underload.
Background technology
When in the load of freezer is lower than Parallel sets, only last compressor surplus runs the cold produced, traditional Parallel sets relies on compressor self-energy to unload, to mate freezer load.
The shortcoming of this mode is:
One, when the load of freezer is low to moderate the minimum unloaded loads of last compressor itself in Parallel sets, compressor cannot continue unloading, low pressure can be caused too low, cause high frequent start and stop.
Two, the temperature fluctuation in freezer can be caused larger.
Three, refrigeration oil oil return difficulty in evaporimeter.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, there is provided a kind of can when underload the Parallel sets of self-adapting operation and its implementation, high frequent start and stop when avoiding freezer load to be reduced to below the minimum adjustment load of unit, the temperature fluctuation problem avoiding conventional unloading to cause, avoids the evaporimeter problem of oil return that conventional unloading causes.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of can when underload the Parallel sets of self-adapting operation, comprise some compressors, the output of described compressor connects oil eliminator, described oil eliminator connects condenser, described condenser connects reservoir, described reservoir connects filter, described filter connects expansion valve, described expansion valve connects evaporimeter, described evaporimeter connects the input of described compressor, the output of described oil eliminator is also connected with hot gas bypass solenoid valve, and described hot gas bypass solenoid valve connects hot gas bypass valve, and described hot gas bypass valve connects the input of described compressor; The output of described filter was also connected with thermoelectrical magnetic valve, described in went thermoelectrical magnetic valve connect removed thermal expansion valve, described in went thermal expansion valve to connect the input of described compressor; The output of described oil eliminator is also connected with and rushes solenoid, the described input rushing solenoid and connect described evaporimeter.
Further, also comprise PLC, described compressor, hot gas bypass solenoid valve, removed thermoelectrical magnetic valve and rushed solenoid and be all connected with described PLC, described PLC is connected with low pressure sensor.
Further, the output of described filter is provided with liquid-sighting glass.
Thisly the operation implementation method of the Parallel sets of self-adapting operation can be when underload:
A. a part of high temperature refrigerant gas is derived from the output of compressor, part of refrigerant liquid is derived from the output of filter, the two mixed cryogenic gas is sent into the input of compressor, thus the input pressure of constant compression machine, and the refrigerant gas temperature avoiding compressor to suck is too high and compressor exhaust temperature that is that cause is too high;
B. derive a part of high temperature refrigerant gas from the output of compressor, send into evaporimeter, help evaporimeter to complete the oil return of refrigeration oil.
The present invention a kind of can when underload the Parallel sets of self-adapting operation and its implementation, by improving the structure of Parallel sets, avoid high frequent start and stop when freezer load is reduced to below the minimum adjustment load of unit, avoid the temperature fluctuation problem that conventional unloading causes, avoid the evaporimeter problem of oil return that conventional unloading causes, add MANUAL CONTROL mode simultaneously, make Parallel sets more stable, energy-conservation.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of Parallel sets in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 1, a kind of can when underload the Parallel sets of self-adapting operation, comprise two compressors 1, the output of compressor 1 connects oil eliminator 2, and oil eliminator 2 connects condenser 3, and condenser 3 connects reservoir 4, reservoir 4 connects filter 5, filter 5 connects expansion valve 6, and expansion valve 6 connects evaporimeter 7, and evaporimeter 7 connects the input of compressor 1.
The output of oil eliminator 2 is also connected with hot gas bypass solenoid valve 8, hot gas bypass solenoid valve 8 connects hot gas bypass valve 81, hot gas bypass valve 81 connects the input of compressor 1, the output of filter 5 was also connected with thermoelectrical magnetic valve 9, go thermoelectrical magnetic valve 9 to connect and removed thermal expansion valve 91, go thermal expansion valve 91 to connect the input of compressor 1.
The output of oil eliminator 2 is also connected with and rushes solenoid 10, rushes the input that solenoid 10 connects evaporimeter 7, utilizes being blown into of refrigerant gas to help evaporimeter oil return.
Parallel sets also comprises PLC 11, compressor 1, hot gas bypass solenoid valve 8, removed thermoelectrical magnetic valve 9 and rushed solenoid 10 and be all connected with PLC 11, PLC 11 is connected with low pressure sensor 12, and PLC 11 is provided with automatic and manual two kinds of patterns.
The output of filter 5 is provided with liquid-sighting glass 51, and whether the refrigerant liquid being used for observing the outflow of filter output is qualified.
Operation principle: during parallel machine set operation, the refrigerant gas that compressor is discharged is first through oil eliminator, refrigerant liquid is become again through condenser condenses, store in reservoir, and then successively through filter and liquid-sighting glass, then by after expansion valve throttling, enter evaporimeter extracting medium heat and become gas, then get back to the arrival end of compressor, complete a kind of refrigeration cycle.When freezer load is in normal range (NR), hot gas bypass solenoid valve, hot gas bypass valve, rush solenoid, removed thermoelectrical magnetic valve and went thermal expansion valve all do not participate in run.
When freezer load is reduced to lower than last still when the minimum unloaded loads of the compressor run, low pressure sensor transmission low-voltage signal, PLC controls hot gas bypass solenoid valve and opens, high temperature refrigerant gas can flow to compressor input by hot gas bypass valve, and hot gas bypass valve regulates the flow of high temperature refrigerant gas according to the low pressure value of setting.In addition, went thermoelectrical magnetic valve also can open simultaneously, refrigerant liquid flow to thermal expansion valve through past overheated magnetic valve, low-temperature refrigerant liquid was become by going the throttling action of thermal expansion valve, this liquid and hot gas bypass valve flow through the high temperature refrigerant gas and vapor permeation come and enter compressor input, thus constant compression machine input pressure, and the refrigerant gas temperature avoiding compressor to suck is too high and compressor exhaust temperature that is that cause is too high.
When freezer underrun, rushing solenoid can open once at set intervals, then through closing after a period of time, these two times can set and regulate according to on-the-spot applicable cases, to reach best resultant effect.
This application can switch between automatic mode and manual mode.When conventional operation, freezer load just reduces once in a while, and so this invention controls according to the above logic automatically with whole Parallel sets; When freezer load is in lower for a long time, at this moment, have the mode that two kinds of judgement freezers have been in low load condition, one is that unit control system can carry out automatic decision freezer by the factor of the quantity of compressor run, running time and low pressure and is in low load condition, and two is that client judges voluntarily according to self applicable cases.When judged result out after, manual underload control model can be opened, now, force only to open a compressor, hot gas bypass solenoid valve and went thermoelectrical magnetic valve also positive opening, hot gas bypass valve and went thermal expansion valve Adaptive matching, avoids last compressor run caused when low pressure is gone up instantaneously or reduces and constantly adds and unload and frequent start-stop, the even moment start and stop of the second compressor, thus reach stable and energy-conservation double effects.
The present invention a kind of can when underload the Parallel sets of self-adapting operation and its implementation, by improving the structure of Parallel sets, avoid high frequent start and stop when freezer load is reduced to below the minimum adjustment load of unit, avoid the temperature fluctuation problem that conventional unloading causes, avoid the evaporimeter problem of oil return that conventional unloading causes, add MANUAL CONTROL mode simultaneously, make Parallel sets more stable, energy-conservation.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. one kind can when underload the Parallel sets of self-adapting operation, comprise some compressors, the output of described compressor connects oil eliminator, described oil eliminator connects condenser, and described condenser connects reservoir, and described reservoir connects filter, described filter connects expansion valve, described expansion valve connects evaporimeter, and described evaporimeter connects the input of described compressor, it is characterized in that:
The output of described oil eliminator is also connected with hot gas bypass solenoid valve, and described hot gas bypass solenoid valve connects hot gas bypass valve, and described hot gas bypass valve connects the input of described compressor;
The output of described filter was also connected with thermoelectrical magnetic valve, described in went thermoelectrical magnetic valve connect removed thermal expansion valve, described in went thermal expansion valve to connect the input of described compressor;
The output of described oil eliminator is also connected with and rushes solenoid, the described input rushing solenoid and connect described evaporimeter.
2. according to claim 1 a kind of can when underload the Parallel sets of self-adapting operation, it is characterized in that: also comprise PLC, described compressor, hot gas bypass solenoid valve, removed thermoelectrical magnetic valve and rushed solenoid and be all connected with described PLC, described PLC is connected with low pressure sensor.
3. according to claim 1 a kind of can when underload the Parallel sets of self-adapting operation, it is characterized in that: the output of described filter is provided with liquid-sighting glass.
4. according to claim arbitrary in claim 1-3 a kind of can when underload the operation implementation method of the Parallel sets of self-adapting operation, it is characterized in that:
A. a part of high temperature refrigerant gas is derived from the output of compressor, part of refrigerant liquid is derived from the output of filter, the two mixed cryogenic gas is sent into the input of compressor, thus the input pressure of constant compression machine, and the refrigerant gas temperature avoiding compressor to suck is too high and compressor exhaust temperature that is that cause is too high;
B. derive a part of high temperature refrigerant gas from the output of compressor, send into evaporimeter, help evaporimeter to complete the oil return of refrigeration oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510295255.XA CN105042918A (en) | 2015-06-02 | 2015-06-02 | Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof |
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| CN201510295255.XA CN105042918A (en) | 2015-06-02 | 2015-06-02 | Parallel compressors unit capable of self-adaptively operating at low load and implementation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444183A (en) * | 2018-05-30 | 2018-08-24 | 无锡海核装备科技有限公司 | A kind of accurate temperature controlling cold storage plant peculiar to vessel |
| CN113803859A (en) * | 2020-06-15 | 2021-12-17 | 重庆美的通用制冷设备有限公司 | Air conditioner, control method, control device, and computer-readable storage medium |
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| CN200952853Y (en) * | 2006-08-09 | 2007-09-26 | 王德元 | Parallel double compressor heat pump hot-water machine set |
| CN201909486U (en) * | 2010-12-13 | 2011-07-27 | 泰豪科技股份有限公司 | Air conditioner capable of performing low-load running of machine set by hot-gas bypass adjusting valve |
| CN202734366U (en) * | 2012-07-05 | 2013-02-13 | 泰豪科技股份有限公司 | Air conditioning unit running at low load |
| CN204084713U (en) * | 2014-09-27 | 2015-01-07 | 泰豪科技股份有限公司 | A kind of double-condenser Temperature and Humidity Control air conditioner |
| CN204240671U (en) * | 2014-10-11 | 2015-04-01 | 西克制冷（无锡）有限公司 | A kind of Parallel sets control system |
| CN204880838U (en) * | 2015-06-02 | 2015-12-16 | 西克制冷（无锡）有限公司 | Can be when low -load parallelly connected unit of self -adaptation operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1414324A (en) * | 2002-10-16 | 2003-04-30 | 广东科龙电器股份有限公司 | Twin compressor room air conditioner and its control method |
| CN200952853Y (en) * | 2006-08-09 | 2007-09-26 | 王德元 | Parallel double compressor heat pump hot-water machine set |
| CN201909486U (en) * | 2010-12-13 | 2011-07-27 | 泰豪科技股份有限公司 | Air conditioner capable of performing low-load running of machine set by hot-gas bypass adjusting valve |
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| CN204084713U (en) * | 2014-09-27 | 2015-01-07 | 泰豪科技股份有限公司 | A kind of double-condenser Temperature and Humidity Control air conditioner |
| CN204240671U (en) * | 2014-10-11 | 2015-04-01 | 西克制冷（无锡）有限公司 | A kind of Parallel sets control system |
| CN204880838U (en) * | 2015-06-02 | 2015-12-16 | 西克制冷（无锡）有限公司 | Can be when low -load parallelly connected unit of self -adaptation operation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108444183A (en) * | 2018-05-30 | 2018-08-24 | 无锡海核装备科技有限公司 | A kind of accurate temperature controlling cold storage plant peculiar to vessel |
| CN113803859A (en) * | 2020-06-15 | 2021-12-17 | 重庆美的通用制冷设备有限公司 | Air conditioner, control method, control device, and computer-readable storage medium |
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